WO2019024941A1 - 打磨工具及其主体部和打磨部 - Google Patents

打磨工具及其主体部和打磨部 Download PDF

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Publication number
WO2019024941A1
WO2019024941A1 PCT/CN2018/099070 CN2018099070W WO2019024941A1 WO 2019024941 A1 WO2019024941 A1 WO 2019024941A1 CN 2018099070 W CN2018099070 W CN 2018099070W WO 2019024941 A1 WO2019024941 A1 WO 2019024941A1
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WIPO (PCT)
Prior art keywords
axis
connector
sanding
housing
connecting member
Prior art date
Application number
PCT/CN2018/099070
Other languages
English (en)
French (fr)
Inventor
孙益民
钱富
张士松
钟红风
毋宏兵
吉绍山
梅杰
Original Assignee
苏州宝时得电动工具有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201710661162.3A external-priority patent/CN109382735B/zh
Application filed by 苏州宝时得电动工具有限公司 filed Critical 苏州宝时得电动工具有限公司
Priority to US16/635,843 priority Critical patent/US20200338686A1/en
Priority to CN201880048478.8A priority patent/CN110944794B/zh
Priority to CN202110048358.1A priority patent/CN113043133B/zh
Publication of WO2019024941A1 publication Critical patent/WO2019024941A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028—Angle tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/005—Auxiliary devices used in connection with portable grinding machines, e.g. holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor

Definitions

  • the present invention relates to a hand-held power tool, and more particularly to a sander having a floor replacement structure.
  • the existing sanding machine includes a round sand machine and a flat sand machine, wherein the output shaft of the round sand machine drives the grinding bottom plate to perform round sand movement, that is, orbital and rotation orbital motion, for grinding a relatively large amount of material, for example, For rough grinding.
  • round sand movement that is, orbital and rotation orbital motion
  • the spinning motion of the sanding plate of the flat sand is limited, so that the sanding plate is oscillated and is suitable for grinding a small amount of material, for example for fine machining or finishing.
  • the shape of the different bottom plates can also be adapted to different operating conditions.
  • the rectangular sand floor can be used for the grinding of conventional operating conditions; and the triangular sand floor is obviously more advantageous when grinding the working surface in the corner area; there is also a shaped bottom plate with a finger shape, which is more suitable for the grinding area. Small work surface.
  • the convenience of sanding machines that can adapt to a variety of operating conditions has made them widely favored in the market.
  • the various operating conditions here include the need for fine grinding and rough grinding operating conditions, or different bottom plate shapes to meet the operating conditions of different sanding areas.
  • a sander capable of adapting to various operating conditions becomes a multifunctional sander.
  • replacing the base plate is a common way to achieve multiple functions.
  • the bottom plate has no swinging foot limitation, and the orbital movement of the revolution and the rotation is performed; when the sanding bottom plate and the sander main body are installed, the bottom plate is only under the restriction of the swinging foot, and only the revolving motion is performed. Orbital movement.
  • the replacement of the bottom plate of different shapes through the bottom plate naturally enables the multifunctional sander to meet the operating conditions of different sanding areas.
  • a base plate replacement structure is disclosed in the Chinese patent application CN103506923A and the US Pat. No. 8,821,220 B2.
  • the bottom plate includes a base body for mounting sandpaper and an input assembly that is driven by the motor within the base body and rotatable relative to the base body.
  • the axial locking of the bottom plate and the main body along the motor shaft is realized by a connecting mechanism, and the connecting mechanism comprises a special-shaped locking wire located at the main body and a card slot corresponding to the special-shaped locking wire on the bottom plate, because the locking wire and the card slot of the connecting mechanism are not Rotating, the body portion and the bottom plate are realized by a torque transmitting mechanism.
  • the bottom plate body and the input assembly are all moving during operation, so the bottom plate also needs to include a fixed base for setting the card slot. Therefore, in addition to the need to provide a bearing between the floor body and the input assembly, the base plate and the input are required. Bearings are also required between the components to enable the input assembly to move relative to the base body, which replaces the structure, making the base plate structure complicated and costly.
  • the invention provides a sanding tool with simple and convenient bottom plate replacement structure.
  • a sanding tool comprising: a main body portion including a housing, a motor disposed in the housing, and an output assembly driven by the motor; and a grinding portion
  • the sanding portion is detachably coupled to the body portion, the sanding portion includes a body, and an input assembly that rotates relative to the body about a first axis of rotation; the body portion further includes an activity relative to the housing a first connecting member, the input assembly comprising a second connecting member, and an eccentric member eccentrically disposed with respect to the first axis of rotation, the body being coupled to the eccentric member, the first connecting member being operable Moving relative to the second connector to mate the first connector and the second connector, such that the output assembly is capable of driving the input assembly to rotate about a first axis of rotation to drive the Body movement.
  • the sharpening portion is inseparable from the main body portion in the axial direction.
  • the sanding tool further includes a locking mechanism that enables the second connector to be fixed relative to the housing.
  • the locking mechanism includes a first locking member movable relative to the housing in a locked position and a released position and a second locking member disposed in a non-rotatable relationship with the second connecting member when in the locked position
  • the first locking member is mated with the second locking member, the second connecting member is fixed relative to the housing; when in the releasing position, the first locking member and the second locking member are mutually Separating, the second connector is rotatable relative to the housing.
  • the first locking member is located at the main body portion, and the second locking member is located at the sharpening portion.
  • the first connector includes a first support portion
  • the second connector includes a second support portion for mating with the first support portion
  • a hollow shaft is disposed outside the first connecting member, the hollow shaft is fixedly disposed with respect to the output assembly, and a first supporting portion is disposed at an end of the hollow shaft adjacent to the sharpening portion, the second connection
  • the member includes a second support portion for mating with the first support portion.
  • the second support portion is provided as a groove, and an outer diameter of the first support portion matches an inner diameter of the recess.
  • a central axis of the first support portion is collinear with the first axis of rotation.
  • the first connecting member is provided with a first mating portion
  • the second connecting member includes a second mating portion for mating with the first mating portion
  • the first mating portion is provided with an external thread
  • the second mating portion is provided as a mounting hole
  • the mounting hole is provided with an internal thread that is matched with the external thread
  • a central axis of the first mating portion is collinear with the first axis of rotation.
  • the output assembly includes an output portion, the input assembly including an input portion for mating with the output portion, the output being coupled when the first connector and the second connector are mated A portion is coupled to the input portion to transmit rotational motion of the motor to the input assembly.
  • the input portion includes a plurality of second ratchet teeth distributed circumferentially
  • the output portion includes a plurality of first ratchet teeth that are meshed with the second ratchet teeth.
  • the axis of rotation of the first connector is collinear with the first axis of rotation.
  • the main body portion includes an elastic swinging foot fixedly disposed with respect to the housing, and the sanding portion is provided with a limiting leg that is coupled to the elastic swinging foot.
  • the output assembly includes a first drive wheel driven by a motor, and a second drive wheel driven by the first drive wheel, and an axis of rotation of the first drive wheel and an axis of rotation of the second drive wheel Parallel and spaced settings.
  • the sanding tool further comprises a second fan fixedly disposed opposite the second drive wheel, and a first fan disposed coaxially with the motor and located at an end of the motor near the sanding portion.
  • the housing is provided with at least one air inlet and at least one air outlet, the air inlet is located at an end of the motor away from the polishing portion, and the air outlet is disposed adjacent to the second fan, and the external airflow And entering the housing from the air inlet through the air inlet, flowing through the motor, and flowing out from the second air outlet under the action of the second fan.
  • the technical solution is adopted in the invention, so that the structure of the polishing portion is simple, and the disassembly and assembly between the polishing portion and the main body portion is convenient.
  • the present invention also provides a main body portion for easily disassembling and polishing the sanding portion.
  • a technical solution provided by the present invention is: a main body portion of a sanding tool for connecting with a sanding portion of a detachable sanding tool, the body portion comprising: a casing; a motor housed in the casing, Providing rotational power; an output assembly rotatable relative to the housing under driving of the motor; the body portion further comprising a first connecting member movably disposed on the housing, the first connecting member Cooperating with the sharpening portion and being rotatable relative to the housing under the driving of the output assembly.
  • the first connecting member comprises a first mating portion, and the first mating portion is provided with an external thread.
  • the body portion further includes a hollow shaft sleeved on the first connector, the first connector being operatively movable relative to the hollow shaft.
  • the output assembly includes an output portion that is fixedly coupled to the hollow shaft.
  • the main body portion further includes a locking mechanism having a locked state and an unlocked state, the locking mechanism being capable of preventing the hollow shaft from rotating relative to the housing when in the locked state, when being in an unlocked state
  • the hollow shaft is rotatable relative to the housing.
  • the main body portion further includes an operating mechanism including an operating member capable of controlling the switching of the locking mechanism in the locked state and the unlocked state.
  • the operating member is switchable between a first position and a second position, the operating member at least partially extending out of the housing when in the first position, and the operating member is not in the second position Beyond the outer contour of the housing.
  • the locking mechanism when the operating member is switched to the first position, the locking mechanism is switched to the locked state, and when the operating member is switched to the second position, the locking mechanism is switched to the unlocked state.
  • the locking mechanism includes a first locking member fixedly disposed with respect to the hollow shaft, a second locking member movably disposed relative to the housing, and a first elastic member located between the housing and the second locking member
  • the first elastic member is in a released state
  • the first locking member and the second locking member are mated with each other;
  • the operating member abuts the second locking member to bring the elastic member into a compressed state, and the first locking member and the second locking member are separated from each other.
  • the first connector comprises a transmission element, the operating member operatively driving the movement of the first connector by the transmission element.
  • the operating mechanism further includes a base rotatable relative to the housing about a second axis of rotation, the operating member being pivotable relative to the base between the first operational position and the second operational position, The operating member is separated from the transmission member when the operating member is in the first operating position, and the operating member is coupled to the transmission member when the operating member is in the second operating position, thereby being capable of driving the first
  • the connector rotates about the second axis of rotation.
  • the output assembly includes an output portion rotatable about a third axis of rotation, the output portion including a plurality of ratchet teeth circumferentially distributed about the third axis of rotation.
  • the third axis of rotation is parallel and spaced apart from the axis of the motor.
  • the housing is provided with a grip handle extending at an angle to the motor axis, and the axis of the motor and the grip handle are respectively located on opposite sides of the third rotation axis.
  • the output assembly includes an output shaft that is coaxially and fixedly coupled to the first connector.
  • the body portion further comprises two pairs of limit legs respectively disposed diagonally.
  • the present invention also provides a sharpening portion that facilitates mating with the body portion of the sharpening tool.
  • a sharpening portion of a sanding tool for detachably mating with a main body portion of a sanding tool, the sanding portion comprising: a body; an input assembly at least partially received in the body
  • the input assembly is rotatable relative to the body about a first axis of rotation, the input assembly comprising an eccentric element, the eccentric element being eccentrically disposed relative to the first axis of rotation, the body being coupled to the eccentric element
  • the input assembly further includes a second connector that is fixedly disposed opposite the eccentric member, the second connector being engageable with the body portion.
  • the body includes a cover sleeve sleeved on an outer side of the second connector, and a plate-shaped body axially fixed to the cover body and located under the cover body, the plate-shaped body being used for mounting a grinding component,
  • the second connecting member includes a second mating portion and a second supporting portion connected to the second mating portion.
  • the second mating portion is provided as a mounting hole extending in a direction of a rotation axis
  • the second supporting portion is provided as a groove extending in a direction of a rotation axis
  • a lower end of the mounting hole is opposite to the groove The lower end is closer to the plate-like body.
  • the second connector includes a mounting hole extending in a direction of the first axis of rotation, the mounting hole having an internal thread.
  • the second connecting member further includes a groove extending in a direction of the first rotation axis, the groove being in communication with the mounting hole.
  • the outer diameter of the groove is larger than the outer diameter of the mounting hole.
  • the ratio of the axial dimension to the outer diameter dimension of the second support portion is between 0.33-1.7.
  • a central axis of the groove is collinear with a central axis of the mounting hole and the first axis of rotation.
  • the input assembly further includes an input for transmitting torque, the input being fixedly disposed relative to the second connector.
  • the output portion includes a plurality of ratchet teeth circumferentially distributed about the first axis of rotation.
  • the input assembly further includes a balance block, a central axis of the eccentric element being located on one side of the first axis of rotation, the balance block being located on the other side of the first axis of rotation opposite the central axis .
  • the weight is located at an end of the eccentric element away from the input.
  • the body includes a cover sleeve sleeved on an outer side of the second connector member and a plate-shaped body axially fixed to the cover body, the plate-shaped body being used for mounting a sanding component, the plate-shaped body Can be set to a circle, rectangle or irregular shape.
  • Fig. 1 is a schematic view showing the operating member in a closed state in the first embodiment of the present invention.
  • FIG. 2 is a schematic view showing the structure of a joint portion between a main body portion and a sharpening portion in the first embodiment of the present invention.
  • Figure 3 is a partial enlarged view of a portion A of Figure 1.
  • Fig. 4 is a schematic view showing the operating member in an open state in the first embodiment of the present invention.
  • Figure 5 is a partial enlarged view of a portion C of Figure 1.
  • Fig. 6 is a schematic view showing the input unit abutting against the large end surface in the first embodiment of the present invention.
  • Figure 7 is a partial enlarged view of a portion B of Figure 1 of the present invention.
  • Fig. 8 is a schematic view showing the inner air passage of the sanding tool in the first embodiment of the present invention.
  • Fig. 9 is a view showing the positional relationship between the sharpening portion and the elastic member in the first embodiment of the present invention.
  • Figure 10 is a schematic view showing the structure of a limiting mechanism in the first embodiment of the present invention.
  • Figure 11 is a cross-sectional view showing the position where the limiting post and the limiting hole are mated in the first embodiment of the present invention.
  • FIG. 12 is a schematic structural view of a position limiting mechanism according to another embodiment of the present invention.
  • Figure 13 is a schematic illustration of a sharpening portion of the present invention mated with a stop mechanism of another embodiment.
  • Fig. 14 is a partial cross-sectional view showing the position limiting mechanism of the embodiment of the present invention mated with the sharpening portion.
  • Figure 15 is a schematic view showing the internal structure of a sanding tool in a first embodiment of the present invention.
  • Figure 16 is a schematic view of a locking mechanism in the first embodiment of the present invention.
  • Figure 17 is a schematic illustration of the operating mechanism of the operating member of the present invention in the closed state.
  • Figure 18 is a schematic illustration of the operating mechanism of the operating member of the present invention in an operational state.
  • Fig. 19 is a schematic view showing the external wind direction of the sharpening tool in the first embodiment of the present invention.
  • Figure 20 is a schematic view showing the external wind direction of the sharpening tool in the second embodiment of the present invention.
  • Figure 21 is a schematic view showing the inner air passage of the sanding tool in the second embodiment of the present invention.
  • Fig. 22 is a cross-sectional view showing a state in which the main body portion of the sharpening tool and the sharpening portion are not joined in the second embodiment of the present invention.
  • Fig. 23 is a cross-sectional view showing a state in which a main body portion of a sharpening tool and a sharpening portion are mated in a second embodiment of the present invention.
  • Figure 24 is a partial enlarged view of a portion D of Figure 22.
  • Figure 25 is a schematic view showing the structure of a locking mechanism in a second embodiment of the present invention.
  • Fig. 26 is a view showing the structure of the sanding tool in the third embodiment of the present invention when the locking mechanism is in the locked state.
  • Figure 27 is a schematic view showing the structure of the polishing tool in the third embodiment of the present invention when the locking mechanism is in the unlocked state.
  • Fig. 28 is a view showing a state in which the main body portion of the middle sharpening tool and the sharpening portion are not mated in the fourth embodiment of the present invention.
  • Figure 29 is a cross-sectional view taken along line F-F of Figure 28.
  • Figure 30 is a cross-sectional view showing the lock mechanism in an unlocked state in a fifth embodiment of the present invention.
  • Figure 31 is a cross-sectional view showing the lock mechanism in a locked state in the fifth embodiment of the present invention.
  • Figure 32 is a cross-sectional view showing the operating member of the sixth embodiment of the present invention disconnected from the first connecting member.
  • Figure 33 is a cross-sectional view showing the operation member connected to the first connecting member in the sixth embodiment of the present invention.
  • reference numeral 10 denotes a total exemplary hand tool.
  • the sander 10 is specifically described as an exemplary hand-held power tool, the sander 10 includes a main body portion 11 and a sharpening portion 12, and the main body portion 11 includes a housing 110, a motor 112 located in the housing 110, and a motor 112 drives the rotating output assembly 113.
  • the sharpening portion 12 includes a body 120 and an input assembly 121 located within the body 120.
  • a side of the body 120 facing the surface to be machined can be equipped with a sanding component (such as sandpaper), and the input component 121 can be rotated relative to the body 120 under the driving of the output component 113. To drive the body 120 to work.
  • a sanding component such as sandpaper
  • the main body portion 11 further includes a first connecting member 114
  • the sharpening portion 12 includes a second connecting member 122 that cooperates with the first connecting member 114.
  • the connecting member 114 and the second connecting member 122 are coupled to connect the sharpening portion 12 and the main body portion 11 in an axially inseparable manner along the motor 112
  • the first connecting member 114 and the second connecting member 122 can be input.
  • the components 121 rotate together.
  • the first connecting piece 114 and the second connecting piece 122 are connected by screwing.
  • the output assembly 113 includes a first driving wheel 1131 disposed coaxially with the motor 112 and driven to rotate by the motor 112, and a first driving wheel 1131 and having an axis of rotation spaced from the axis of rotation of the first driving wheel 1131.
  • the two driving wheels 1132 in order to reduce the noise and vibration of the first driving wheel 1131 and the second driving wheel 1132 during torque transmission, preferably, the first driving wheel 1131 and the second driving wheel 1132 are driven by a belt. Power transmission.
  • the main body portion 11 in order to achieve better support for the second driving wheel 1132, the main body portion 11 further includes a connecting shaft 115 disposed in the housing 110, and the second driving wheel 1132 is sleeved outside the connecting shaft 115 for connecting.
  • the shaft 115 effects support of the second drive wheel 1132.
  • the second driving wheel 1132 is fixedly sleeved on the outer side of the connecting shaft 115 to drive the connecting shaft 115 to rotate, and the connecting shaft 115 is rotatably disposed on the housing 110 through the supporting bearing 116.
  • the connecting shaft 115 can also be disposed to be fixedly coupled to the housing 110, that is, non-rotatably fixed to the housing 110, while the second driving wheel 1132 is disposed to be rotatable and coupled to the shaft 115. The connection is made to support the second drive wheel 1132 through the connecting shaft 115.
  • the output assembly 113 further includes an output portion 1133 that is fixedly coupled to the second drive wheel 1132, the input assembly 121 including an input portion 1210 that mates with the output portion 1133.
  • the output portion 1133 and the input portion 1210 are provided as end face ratchets.
  • the output portion 1133 and the input portion 1210 may also be provided in other forms capable of transmitting torque, such as a flat structure. .
  • the output assembly 113 transmits torque to the input assembly 121 to drive the input assembly 121 to rotate relative to the body 120.
  • the output portion 1133 can also be disposed outside the connecting shaft 115, the second driving wheel 1132 is rotated by the driving connecting shaft 115, and then the output shaft 1133 is driven by the connecting shaft 115 to rotate, that is,
  • the connecting shaft 115 serves as a part of the output unit 113 as a drive shaft for driving the output unit 1133.
  • the input assembly 121 is at least partially disposed in the axial direction as an eccentric element 124, the central axis X1 of the eccentric element 124 being spaced from the axis of rotation X0 of the input assembly 121, ie, the central axis X1 of the eccentric element 124 and its axis of rotation X0 There is an eccentric distance e between them.
  • the body 120 includes a plate-like body 1202 for mounting sandpaper and a cover 1201 fixedly coupled to the plate-shaped body 1202.
  • the cover 1201 is disposed on the outer side of the eccentric member 124 by a mounting bearing 123 to drive the body through the rotation of the eccentric member 124. 120 sports.
  • the input assembly 121 further includes a weight 12 with the central axis of the eccentric element located at the input assembly One side of the rotation axis X0, the weight 1211 is located on the other side of the first rotation axis X0 opposite to the center axis.
  • the balance block 1211 is disposed in the bottom plate, so that different sanding portions (such as a round sanding portion or a sanding portion) can have independent weights 1211 to achieve an optimal damping effect. It can be understood that the weight 1211 can be disposed below the mounting bearing 123 or above the mounting bearing 123, which can also be located below the mounting bearing 123 and below the mounting bearing.
  • the first connecting member 114 includes a first mating portion 1141 for connecting with the second connecting member 122 , preferably first
  • the mating portion 1141 is provided with an external thread 1140.
  • the second connecting member 122 includes a second mating portion 1221 that is coupled to the first mating portion 1141.
  • the second mating portion 1221 is configured to receive the first mating portion.
  • the mounting hole of the portion 1141 is provided with an internal thread 1220 that is engaged with the external thread 1140 on at least a portion of the inner circumferential surface of the mounting hole.
  • the connecting shaft 115 is a hollow shaft
  • the first connecting member 114 is at least partially located in the hollow shaft 115.
  • the upper end of the first connecting member 114 is provided with a flange. 1142.
  • the second connecting member 122 in order to ensure the coaxiality of the main body portion 11 and the sharpening portion 12, that is, the coaxiality between the first connecting member 114 or the connecting shaft 115 and the rotation axis of the input assembly 121 to lower the sander 10 In the vibration during operation, the second connecting member 122 further includes a supporting portion 1222.
  • the second supporting portion 1222 is disposed as a groove extending in the direction of the rotation axis, and is formed below the connecting shaft 115. It is substantially the same as the outer diameter of the groove for extending into the first support portion 1152 in the groove.
  • the connecting shaft 115 extends to the length L1 of the mounting hole, that is, the axial dimension of the first supporting portion 1152 is L1, and L1 is between 4 mm and 30 mm, preferably, L1 is between 11.25 mm and 13.75 mm, more preferably Ground, L1 is 12.5mm.
  • the first support portion 1152 and the second support portion 1222 (groove) are matched by a small gap, that is, the outer diameter of the first support portion 1152 and the outer diameter of the second support portion 1222 (groove) are substantially Similarly, hereinafter referred to as the mating diameter D1, the mating diameter D1 is between 7 mm and 12 mm, preferably, the mating diameter D1 is between 8.55 mm and 10.45 mm, and more preferably, the mating diameter D1 is 9.5 mm.
  • the mating diameter D1 is a certain value, the greater the mating length L1, the better the mating effect, that is, the better the coaxiality.
  • the longer the L1 the higher the height of the whole machine.
  • the main body portion 11 is provided with an abutting end surface abutting the upper end surface of the input assembly 121.
  • the diameter D2 of the abutting end face is larger than D1.
  • the abutting end surface is an end surface of the second driving wheel 1132 that abuts the input component 121.
  • the abutting end surface may also be fixedly connected with the second driving wheel 1132 and input.
  • the end face of the component 121 abuts.
  • the ratio of the mating length L1 to the mating diameter D1 is as small as 0.33, which can ensure that the matching length L1 is short when D1 is a certain value, of course, Understandably, under the premise of ensuring the large end face of D2, the larger the value of L1/D1, the more favorable the stability of coaxiality. .
  • the sharpening portion 12 may be a round sanding portion as shown in FIGS. 1, 2, and 8, and a sanding portion as shown in FIGS. 9, 13, and 15, wherein the plate of the round sand bottom plate
  • the body 1202 has a circular shape, and the plate-shaped body 1202 of the sand-blasting bottom plate has a rectangular shape. The operator can alternately match the round sanding portion or the sand-sanding portion with the main body portion 11 according to different grinding requirements.
  • the body 120 of the round sanding portion is revolved while grinding, and at the same time, the body 120 is rotated by the eccentric element 124 due to the mounting of the bearing 123, that is, the orbital movement of the round sand bottom plate for rotation and revolution, therefore, when When the operator needs to remove a large amount of grinding material, the round sand bottom plate can be attached to the main body portion 11.
  • the sand-grinding portion may be a sanding body having a plate-shaped body of 1/4 sand size, or a plate-shaped body of which is a 1/3-sized sanding portion, and it is necessary to explain that 1/1 is described herein.
  • the sand bottom plate and the 1/4 bottom plate refer to the plate-shaped body 1202 of the sand-sand polishing portion corresponding to or substantially the same as the three-part or four-division size of the sandpaper specification (size 228 mm ⁇ 280 mm) well known in the art.
  • the sand sanding portion fixes the sandpaper to the plate-shaped body 1202 through an elastic clamping member, and the round sand bottom plate fixes the sandpaper to the plate-shaped body by means of felt or the like.
  • the sand bottom plate can also fix the sand paper by means of felt or the like.
  • the plate-shaped body 1202 of the slab bottom plate (1/3 sand bottom plate and 1/4 bottom plate) is rectangular, and if the plate-shaped body 1202 of the slate assembly is rotated and rotated under the action of the input assembly 121 In this case, the four corners of the rectangular plate-shaped body 1201 that rotates at a high speed are liable to be dangerous, so the sander 10 further includes a limiting mechanism 117 for limiting the rotation of the sand floor.
  • the limiting structure 117 includes a limiting substrate 1170, and a limiting leg 1171 disposed on the limiting substrate 1170.
  • each of the limiting legs 1171 includes a plurality of flexible columns, preferably The number of flexible columns is an even number, and more preferably, the number of flexible columns is 4 or 6.
  • the limiting mechanism 117 is located in the main body portion 11, so that it is not necessary to respectively set each of the sand plates or other sanding bottom plates that need to limit their rotation to the limiting structure.
  • the upper end of the limiting leg 1171 is detachably fixed to the housing 110, so that the limiting leg 1171 can be replaced after being damaged by long-term deformation.
  • the upper end of the limiting leg 1171 is connected to the casing by screws, so that the limiting leg 1171 can be stably fixed to the casing 110, and is not easily detached from the casing 110.
  • the upper end of the limiting mechanism 117 is not covered by the outer side of the housing 110, and the lower end of the limiting mechanism 117 is blocked by the limiting substrate 1170.
  • the tool such as the screwdriver or the like cannot protrude into the inside of the housing 110, making the mounting of the limiting mechanism 117 difficult.
  • the plurality of flexible posts of each of the limiting legs 1171 are surrounded by hollow through holes and the through holes penetrate the limiting substrate 1170 so that the operator can screw the screws through the through holes from below the substrate 1170.
  • a limiting post 1172 is disposed on a side of the limiting substrate 1170 facing away from the limiting leg 1171, and the body 120 of the sanding sanding portion is provided with a limiting hole 1203 matched with the limiting post 1172 to limit the sand.
  • the bottom plate is rotated.
  • a resilient member 900 is further disposed between the limiting hole 1203 and the limiting post 1172. Referring to FIG.
  • the elastic member 900 includes a first elastic member 901 between the substrate 1170 and the opening of the limiting hole 1203 for isolating the vibration of the limiting hole 1203 and the limiting mechanism 117 in the up and down direction, that is, isolating the body 120.
  • the elastic member 900 further includes a second elastic member 902 between the limiting post 1172 and the sidewall of the limiting hole 1203 for isolating the radial displacement of the limiting post 1172 and the limiting hole 1203, that is, isolating the body 120. Radial vibration between the limit mechanism 117 and the limit mechanism 117. Referring to FIG.
  • the sanding portion 12 of the sander 10 can be various (such as a round sanding portion or a sanding portion), it is necessary to provide a sanding portion of the limiting mechanism 117, in addition to the above. It is said that the plate-shaped body is 1/3 sand shape and 1/4 sand floor, and another polishing part (also called rat sand) whose plate-like body is approximately iron-like. When four elastic members are arranged on each of the sand bottom plates, a larger number of elastic members are required, which is costly. In addition, since the cooperation between the elastic members 900 and the limiting holes 12 is mostly an interference fit, the elasticity is It is difficult to mount the component 900, and therefore, the more the elastic component 900 is mounted, the more difficult it is to assemble.
  • the present invention further provides a limiting mechanism 117 ′ of another structure.
  • the limiting structure 117 ′ includes a limiting substrate 1170 ′, which is disposed on The limiting legs 1171' on the limiting substrate 1170', each of the limiting legs 1171' includes a plurality of flexible columns, and the limiting mechanism 117' is detachably fixed to the housing 110 of the main body portion 11 by screws or the like, each of which The plurality of flexible columns of the limiting legs 1171' are surrounded by hollow through holes and the through holes penetrate the limiting substrate 1170'.
  • the limiting post 1172' is disposed in the sanding portion, and the plurality of flexible columns of the limiting leg 1171' are surrounded by hollow through holes as the limiting holes 1203. ', and the elastic member 900' is disposed at one end of the hollow through hole near the limiting substrate 1170'.
  • the elastic member 900' in this embodiment includes a first elastic member 901' between the body 120 and the opening of the limiting hole 1203' to isolate the body 120 and
  • the elastic mechanism 900' further includes a second elastic member 902' between the limiting post 1172' and the side wall of the limiting hole 1203' to isolate the limiting post 1172' and the limit
  • the bit hole 1203' vibrates in the radial direction, that is, isolates the radial vibration between the body 120 and the limiting mechanism 117'.
  • the first connecting member 114 is required to be rotated relative to the second connecting member 122, but by the above-described structure of the main body portion 11 and the sharpening portion 12.
  • the external thread 1140 of the first mating portion 1141 interacts with the internal thread 1220 of the second mating portion 1221 to cause the input assembly 121 to rotate together, the input assembly 121
  • the input unit 1210 and the output unit 1133 further drive the output assembly 113 and the connecting shaft 115 to rotate together, so that the relative rotation between the threaded rod 1140 and the mounting hole cannot be achieved, and the external thread 1140 of the first mating portion 1141 is coupled with the second mating portion.
  • the internal thread 1220 of the portion 1221 cannot be tightened or loosened.
  • the sander 10 of the present invention further includes a locking mechanism 118 that enables circumferential locking of the input assembly 121 to effect the first connector 114 relative to the second connector 122.
  • the locking mechanism 118 is disposed on the main body portion 11.
  • the locking mechanism 118 has a locked state and an unlocked state.
  • the locking mechanism 118 circumferentially locks the input component 121, that is, the input component 121 cannot
  • the housing 110 is rotated.
  • the locking mechanism 118 releases the circumferential locking of the input assembly 121, that is, the input assembly 121 is rotatable relative to the housing 110.
  • the locking mechanism 118 locks the input member 121 in the circumferential direction by adopting a circumferential locking of the connecting shaft 115.
  • the locking mechanism 118 includes a first locking member 1181 that is movable but non-rotatable relative to the housing 110 and a second locking member 1182 that is fixedly coupled or integrally disposed with the connecting shaft 115, wherein the first locking member 1181 can be in the first position and Moving between the second positions, when the first locking member 1181 is in the first position, the first locking member 1181 is mated with the second locking member 1182, that is, the locking mechanism 118 is in the locked state, and the connecting shaft 115 is circumferentially locked.
  • the second driving wheel 1132 is fixedly disposed on the outer side of the connecting shaft 115 to drive the connecting shaft 115 to rotate, that is, the connection between the connecting shaft 115 and the output assembly 113 is a non-rotatable connection. Therefore, when the connecting shaft 115 is locked, the output assembly 113 is also locked, and the circumferential direction cannot be rotated. In addition, since the output component 113 and the input component 121 are kneaded or transmitted by ratcheting, that is, the output component 113 and the input component 121 are not rotatable in the circumferential direction, when the connecting shaft 115 is locked, the input component 121 is also The first connector 114 is operatively locked relative to the second connector 122.
  • the first locking member 1181 When the first locking member 1181 is in the second position, the first locking member 1181 is separated from the second locking member 1182, that is, the locking mechanism 118 is in the unlocked state, and the locking mechanism 118 releases the circumferential locking of the connecting shaft 115, and the connecting shaft 115 is connected. It is possible to rotate relative to the housing 110.
  • the first locking member 1181 is a locking block provided with a flat square hole 1810
  • the second locking member 1182 is a flat square shaft portion having a peripheral shape corresponding to the flat square hole, wherein the first locking member 1181 can be along the connecting shaft 115
  • the axial direction moves between the first position and the second position.
  • the flat square hole 1810 of the locking block is mated with the eccentric shaft portion, and the input assembly 121 is circumferentially locked, see FIG. As shown in FIG.
  • the first locking member 1181 when the first locking member 1181 is moved downward from the first position to the second position, the flat hole of the first locking member 1181 is separated from the flat shaft portion and sleeved on the outer side of the connecting shaft 115 due to the flatness.
  • the smallest hole diameter of the square hole is larger than the outer diameter of the connecting shaft 115, and therefore, the connecting shaft 115 is freely rotatable in the circumferential direction.
  • the first locking member 1181 can also be provided as a locking block provided with other shaped holes, such as a diamond, a triangle, a hexagon, or other irregular pattern, and the second locking member 1182 is disposed to be shaped differently from the above.
  • the shaped shaft segment corresponding to the shape of the hole will not be described here.
  • the body portion 11 further includes an operating mechanism 119 that includes an operator for holding
  • the operating member 1190 and the base 1191 are pivotally disposed on the base 1191 by a pivot shaft to switch between the first operating position and the second operating position.
  • the pivot shaft includes a first pivot shaft 1901 fixed to the operating member 1190 and a second pivot shaft 1911 fixed to the base 1191.
  • the base 1191 is provided with a first sliding slot 1912 for rotating the first pivot shaft 1901.
  • the operating member 1190 is provided with a second chute (not shown) for moving the second pivoting shaft 1911.
  • the operating member 1190 can be switched between a first position in the closed state (see FIGS. 1 and 17) and a second position in the open state, requiring explanation.
  • the operating member at least partially protrudes from the housing when in the first position, and the operating member does not extend beyond the outer contour of the housing when in the second position, that is, when in the first position.
  • the operating member 1190 is substantially at the same horizontal line as the grip handle 111. In the second position, the operating member 1190 is placed at an angle with the grip handle 111.
  • the operating mechanism 119 also includes an abutment 1904 between the operating member 1190 and the first locking member 1181.
  • the locking mechanism 118 further includes a first resilient member 1905 located below the first locking member 1181.
  • the operating member 1190 presses the abutting member 1904 downward, while the abutting member 1904 further presses the first elastic member 1905 through the first locking member 1181, thus, the first elasticity The element 1905 is compressed, and the first locking member 1181 is located at the lower second position.
  • the connecting shaft 115 can be rotated by the motor 112 together with the input assembly 121 after the power switch 1120 is activated; when the operating member 1190 is driven from the figure When the closed state shown in FIG.
  • the first elastic member 1905 (not shown)
  • the abutting member 1904 and the first locking member 1181 are moved upward by the first elastic member 1905 to
  • the first locking member 1181 is moved upward to the first position, and therefore, the flat hole 1810 of the locking block is mated with the partial axis portion, and the connecting shaft 115 is circumferentially locked, that is, the input member 121 is circumferentially locked.
  • the sanding machine 10 has a simple structure.
  • the operating member 1190 can also be used to drive the first connecting member 114 to rotate, when the operating member 1190 is opened. After the state, when the operating member, that is, the operating member 1190 is in the first operating position, the operating member 1190 is still unable to drive the first connecting member 114 to rotate, when the operating member 1190 is rotated from the first operating position about the pivot axis to the first In the two operating positions, the operating member 1190 can drive the first link 114 to rotate about its axis (ie, the axis of the input assembly 121).
  • the first connecting member is provided with a transmission component.
  • the transmission component is a second lug 1401 disposed on the first connecting component 114
  • the operating component includes The first lug 1903 corresponding to the second lug 1401, when the operating member 1190 is in the second operating state, the first lug 1903 is mated with the second lug 1401, so that the operating member 1190 can drive the base 1191 and the first
  • the connectors 114 are rotated together with respect to the housing 110 such that the sharpening portion 12 can be coupled or separated from the body portion 11.
  • the main body portion 11 further includes a grip handle 111 for gripping, and a recess 1110 for bending a finger when gripping is provided below the grip handle 111.
  • the power supply unit is a battery pack 13 in the embodiment, and the battery pack 13 is detachably connected to the housing 110. It can be understood that in other embodiments, the power supply unit can also adopt an AC power supply unit.
  • the sander 10 further includes two cooling portions, and a dust guiding portion 63.
  • the two cooling portions are respectively a first cooling portion 61 and a second cooling portion 62, two cooling portions and a dust guiding portion.
  • the portions respectively include a fan disposed in the housing 110, and an air inlet and an air outlet, that is, the first cooling portion 61 includes a first fan 610 (see FIG. 4), a first air inlet 611 and a first air outlet 612, and a second portion.
  • the cooling portion 62 includes a second fan 620, a second air inlet 621 and a second air outlet 622.
  • the dust guiding portion 63 includes a third fan 630, a third air inlet 631 and a third air outlet 632.
  • the first fan 610 is located at a centrifugal fan of the motor 112 away from the end of the sharpening portion 12, and the first air inlet 611 is located at one end of the motor near the sharpening portion 12 and one end away from the sharpening portion 12, that is, the first air inlet 611 is along the axis of the motor 113. distributed.
  • the first air outlet 612 is located in a region corresponding to the first fan 610, that is, between the upper and lower air inlets of the motor 113.
  • the first fan 610 is located above the stator and the rotor in the motor 112, and the stator and rotor flowing from the first air inlet 611 near the end of the sanding portion 12 and flowing through the motor under the action of the first fan 610 After that, the airflow from the first air outlet 612 flows out from the first air inlet which is away from the end of the sanding portion 12, flows through the commutator in the motor 112 (located above the fan), and then flows out from the first air outlet 612. Therefore, the first cooling portion 61 can carry away the heat generated by the motor 112 to achieve cooling of the motor 112.
  • the second fan 620 is fixedly coupled to the second driving wheel 1132 and driven to rotate by the second driving wheel 1132, and the second fan 620 is located below the second driving wheel 1132 to cool the second driving wheel 113 and located at the second a driving belt or the like between the driving wheel 1131 and the second driving wheel 1132, the second air inlet 621 and the second air outlet 622 are located on the housing 110 corresponding to the second fan 620 in the housing 110, and preferably, The second air inlet 621 and the second air outlet 622 are disposed in the upper and lower directions on the casing 110 of the region corresponding to the second fan 620.
  • the third fan 630 is located above the sanding portion 12 and is disposed adjacent to the upper end portion of the sanding portion 12.
  • the third fan 630 and the second fan 620 share the same hub, in other words, the upper portion of the hub is The second fan 620 and the lower side of the hub are the third fan 630.
  • the third air inlet is located at a side of the plate-shaped body 120 facing the sandpaper and the sandpaper, and the third air outlet 632 is a dust collecting outlet that communicates with the third fan 630 to generate debris generated by the sanding portion 12 during the grinding process. The dust is blown through the third fan 630 to the dust bag or the dust box.
  • a sanding machine 10' (hereinafter referred to as a second embodiment) of another structure of the present invention is identical in structure to the sanding machine 10 described above, and includes a main body portion 11' and a sanding portion 12'.
  • the body portion 11' includes a housing 110', a motor 112' located within the housing 110', and an output assembly 113' that is rotated by the motor 112'.
  • the sharpening portion 12' includes a body 120' and an input member 121' located in the body, a side of the body 120' facing the surface to be processed can be mounted with a sanding member (such as sandpaper), and the input member 121' can be driven by the output member 113' Rotating relative to the body 120' to drive the body 120' to operate.
  • the main body portion 11' further includes a first connecting member 114', and the sharpening portion 12 includes a second connecting member 122 that cooperates with the first connecting member 114'.
  • the first connector 114' is rotatable together with the second connector 122' under the drive of the motor 112'.
  • the first connecting member 114' and the second connecting member 122' are connected by means of screwing, that is, the first A connecting member 114' is provided with a first mating portion 1141', and the second connecting member 122' is provided with a second mating portion 1221' that cooperates with the first mating portion 1141'.
  • the first mating portion 1141' is provided with an external thread 1140'.
  • the second mating portion 1221' is provided as a mounting hole capable of receiving the 1141' of the first mating portion, at least part of the inner circumference of the mounting hole
  • the face is provided with an internal thread 1220' that mates with the external thread 1140'.
  • the output assembly 113' in this embodiment includes a first drive wheel 1131' disposed coaxially with the motor 112' and driven to rotate by the motor 112' and driven by the first drive wheel 1131' and rotating with the axis of rotation and the first drive wheel 1131'
  • the second drive wheel 1132' is disposed at an axial interval, and the second drive wheel 1132' supports a hollow connecting shaft 115' rotatably disposed in the housing 110'.
  • the present embodiment is mainly different from the structure of the sander 10 of the above-described embodiment in that the rotation axis of the input member 121' in this embodiment is located between the axis of the motor 112' and the battery pack 13'. Since the motor 112' and the battery pack 13' in the sander 10' are relatively heavy relative to other parts in the whole machine, the center of gravity of the whole machine is located between the motor 112' and the battery pack 13', so that the center of gravity of the whole machine It can be close to the grip handle 111' and close to the rotation axis of the input assembly 121', so that the grip is convenient and the output of the whole machine is relatively stable.
  • the main body portion 11' of the sander 10' needs to be provided with a limiting mechanism.
  • the limiting mechanism In order to reduce the vibration of the whole machine during operation, the limiting mechanism usually includes Multiple limit feet.
  • the rotation axis of the input member 121 since the rotation axis of the input member 121 is located on the side of the motor 112 away from the grip handle 111, the length of the whole machine may increase due to the limit leg, and in this embodiment, due to the rotation of the input member 121'
  • the axis is located on the side of the motor 112' near the grip handle 111', so that the limiting mechanism or the limiting leg moves integrally toward the battery pack 13', which is beneficial to the reduction of the length of the whole machine.
  • the cooling of the motor 112 is completely completed by the first cooling portion 61, and the large fan 620 of the second cooling portion is not utilized, and therefore, the cooling effect of the motor 112 is poor.
  • the present embodiment provides another cooling structure different from the above embodiment.
  • the cooling portion of the sander 10' of the present embodiment includes a first cooling portion (not shown) for cooling the motor 112' and a second driving wheel 1132' for cooling and the connection portion.
  • the first cooling portion includes a first fan 610', and the first fan 610' is located below the stator of the motor 112' and the portion where the rotor is located.
  • the second fan 620' is located below the second drive wheel 1132'.
  • the second fan 620' and the first fan 610' are placed in a vertically displaced manner, that is, the first fan 610' and the second fan 620'.
  • the second fan 620' is located below the first fan 610' in the height direction.
  • the first cooling portion and the second cooling portion share the same air inlet 630' and the air outlet 640'.
  • At least a portion of the air inlet 630' is located above the stator and the rotor of the motor 112', and at least a portion of the air outlet 640'
  • the second fan 620' is capable of guiding the airflow flowing through the first fan 610' from the air outlet 640 so that the airflow can stably enter from the air inlet 630'.
  • the housing 110' is moved by the motor 112' to the first fan 610 and then led out of the housing 110' by the second fan 620', that is, the first cooling of the cooling motor 112' is used in this embodiment.
  • the portion is connected to the second cooling portion for cooling the second driving wheel 1132'.
  • the path of the cooling air path enters from the air inlet 630' and enters from the upper end of the motor 112' (away from the end of the sanding portion 12').
  • the inside of the motor 112' flows out from the lower end of the motor 112' (near one end of the sharpening portion 12'), and then flows out from the air outlet 640' after being guided by the second fan 620'. Thereby, cooling of the motor 112', the second drive wheel 1132', the belt, and the like is achieved.
  • the present embodiment further provides a locking mechanism 118' different from the locking mechanism 118 of the above embodiment.
  • the second locking member 1182' in this embodiment is a flange fixed to the outside of the connecting shaft 115'. a body, wherein the flange body is provided with a stop groove 1810'.
  • the first locking member 1181' is an axially movable stop block. When the stop block moves axially upward to the first position, the stop block is at least partially It is located in the stop groove 1810' to limit the circumferential rotation of the connecting shaft 115'. When the stop block moves axially downward to the second position, the stop block is separated from the stop groove 1810', and the connecting shaft 115' can be freely Turn.
  • the direction of movement of the stop block can also be in other directions, such as radial or other angles with the axial direction, and details are not described herein again.
  • the switching of the locking mechanism 118' between the locked state and the unlocked state by the present embodiment is also realized by the operating member 1190'. Referring to FIG. 24, when the operating member 1190' is in the closed state, the operating member 1190' is axially abutted with the first locking member 1181' (stop block), and the first locking member 1181' compresses the first elastic member 1905' downward.
  • the first locking member 1181' is located at the lower second position, the first locking member 1181' is separated from the second locking member 1182', the locking mechanism 118' is in the unlocked state; when the operating member 1190' is switched from the closed state to the open state At this time, the second locking member 1182' is moved upward to the first position by the first elastic member 1905', the stopper is separated from the stopper groove 1810', and the locking mechanism 118' is in the locked state.
  • a sanding machine 10" (hereinafter referred to as a third embodiment) of another structure of the present invention, which includes a main body portion 11" and a sharpening portion 12", and the main body portion 11" includes a housing 110", A motor 112" located within the housing 110" and an output assembly 113" that is rotated by the motor 112".
  • the sharpening portion 12" includes a body 120" and an input assembly 121" within the body 120", the body 120" facing the surface being machined
  • One side can be equipped with a sanding component (such as sandpaper), and the input component 121" can be rotated relative to the body 120" under the driving of the output component 113" to drive the body 120" to work.
  • the main body portion 11" further includes a first connecting member 114", and the sharpening portion 12" includes a second joint that cooperates with the first connecting member 114" Piece 122", wherein the first connector 114" is rotatable with the second connector 122" under the drive of the motor 112".
  • the first connecting piece 114" and the second connecting piece 122" are connected by screwing.
  • the output assembly 113" includes an output shaft 1135" that is fixedly coupled to the motor 112" and that is rotationally driven by the motor.
  • the first connector 114" includes an external thread 1140" having its outer circumference, and the first connector 114" is fixedly coupled to the output shaft 1135" to coaxially drive the first link 114" to rotate.
  • the first connector 114" is integrally formed with the output shaft 1135".
  • the first connecting piece 114" includes a first mating portion below it for connection with the second connecting member 122".
  • the first mating portion 1141" is provided with an external thread 1140
  • the second connecting member 122 "including the second mating portion 1221” that is mated with the first mating portion 1141" preferably, the second mating portion 1221" is provided as a mounting hole capable of accommodating the 1141" of the first mating portion, the mounting hole At least a portion of the inner circumferential surface is provided with an internal thread 1220" that is engaged with the external thread 1140". Therefore, in the present embodiment, the motor 112" will transmit the rotational motion to the first connecting member 114" through the output shaft 1135".
  • the first connecting member 114" rotates the input assembly 121" relative to the plate-like body 120" by the threaded structure, thereby driving the plate-like body 120" to perform the grinding work, in other words, the first connecting member 114" in the present embodiment.
  • the mating of the thread 1140 with the internal thread 1220" of the mounting hole enables both the axial connection of the body portion 11" and the sharpening portion 12" and the torque transfer between the body portion 11" and the sharpening portion 12".
  • the present embodiment also provides a locking mechanism 118" different from the above-described embodiment, the locking mechanism 118" enabling circumferential locking of the input assembly 121" to achieve the first connector 114" relative to the second connector 122"
  • the locking mechanism 118" is disposed on the main body portion 11"
  • the locking mechanism 181" has a locked state and an unlocked state, and when the locking mechanism 118" is in the locked state, the locking mechanism 118" circumferentially enters the input member 121"
  • the locking that is, the input assembly 121" is not rotatable relative to the housing 110".
  • the locking mechanism 118" When the locking mechanism 118" is in the unlocked state, the locking mechanism 118" releases the circumferential locking of the input assembly 121", ie, the input assembly 121" Rotation is performed relative to the housing 110".
  • the locking mechanism 118" includes a first locking member 1181" that is movable relative to the housing 110" and a second locking member 1182" that is fixedly coupled or integrally disposed with the input member 121".
  • the second locking member 1182" is located at the input.
  • the assembly 121" is remote from one end of the plate-like body 1202" and is exposed outside the body 120" to facilitate mating with the first locking member 1181".
  • the first locking member 1181" is movable between the first position and the second position in the axial direction, see FIG. 26, when the first locking member 1181" is in the lower first position, the first locking member 1181 "matching with the second locking member 1182", that is, the locking mechanism 118" is in the locked state, the input member 121" is locked in the circumferential direction; see Fig. 27, when the first locking member 1181" moves upward and is in the second position above When the first locking member 1181" is separated from the second locking member 1182", that is, the locking mechanism 118" is in the unlocked state, the locking mechanism 118" releases the circumferential locking of the input member 121", and the input member 121" can be opposite to the housing The body 110" is rotated.
  • the present embodiment further includes an operating member 1190" for operating the locking mechanism 118" to enable the first locking member 1181" to move between the first position and the second position, the operating member 1190" being between the open state and the closed state Switching, referring to FIG. 26, when the operating member 1190" is in the closed state, the operating member 1190" axially abuts against the first locking member 1181", and the first locking member 1181" axially presses against the first elastic member 1905" Therefore, the first locking member 1181" is located at the lower first position, and the input member 121" is circumferentially locked; see Fig.
  • the operating member 1190" in this embodiment is not capable of driving the movement of the first connecting member 114", and the first connecting member 114" of the threaded rod is locked in the circumferential direction of the input member 121". Movement, this embodiment is mainly achieved by the rotation of the motor 112" by the external tool 1000".
  • the upper end of the motor 112" is provided with a 1121" flat square shaft section fixedly coupled to the motor 112", which rotates the flat shaft section by an external tool and further causes the threaded rod 1140" to rotate relative to the threaded hole 1220".
  • a sanding machine 20 (hereinafter referred to as a fourth embodiment) of another structure of the present invention, which includes a main body portion 21 and a sharpening portion 22, and the main body portion 21 includes a housing 210 located inside the housing 210. Motor 212 and an output assembly 213 that is rotated by motor 212.
  • the sharpening portion 22 includes a body 220 and an input assembly 221 located in the body 220. A side of the body 220 facing the surface to be machined can be equipped with a sanding component (such as sandpaper), and the input component 221 can be rotated relative to the body 220 under the driving of the output component 213. To drive the body 220 to work.
  • the main body portion 21 further includes a first connecting member 214
  • the sharpening portion 22 includes a second connecting member 222 that cooperates with the first connecting member 214, wherein the first portion
  • the connector 214 is rotatable with the second connector 222 under the drive of the motor 212.
  • the first connecting member 214 and the second connecting member 222 are connected by screwing.
  • the output assembly 213 includes an output shaft 2135 that is fixedly coupled to the motor 212 and that is coaxially driven to rotate by the motor 212, and an output portion 2133 that is fixedly coupled to the output shaft 2135.
  • the input assembly 221 includes an input portion 2210 that mates with the output portion 2133.
  • the output shaft 2135 is a hollow shaft that axially penetrates the motor 212.
  • the first connecting member 214 is provided with an external thread at one end adjacent to the input member 221. And the first connector 214 is at least partially in the hollow shaft.
  • the embodiment further includes a locking structure for locking the input assembly 221, the locking mechanism 218 includes a second locking member 2182 fixedly coupled to the output shaft 2135, and an axially movable but non-rotatable first locking member disposed on the housing 210 2181.
  • the first locking member 2181 is a locking block provided with a square hole or other shaped hole
  • the second locking member 1182 has a peripheral shape corresponding to the flat square hole or other irregular hole, which is substantially the same as the first embodiment described above.
  • the flat square shaft section, the principle of this part has been introduced in the above first embodiment, and will not be described again here.
  • the sander 20 of the present embodiment further includes an operating member mechanism 219.
  • the action and principle of operation of the operating member mechanism 219 are substantially the same as those of the first and second embodiments described above, and will not be described herein.
  • a sanding machine 30 (hereinafter referred to as a fifth embodiment) of another structure of the present invention, which includes a main body portion 31 and a sharpening portion 32.
  • the main body portion 31 includes a housing 310 located inside the housing 310.
  • Motor 312 and output assembly 313 that is rotated by motor 312.
  • the sharpening portion 32 includes a body 320 and an input assembly 321 located in the body 320.
  • a side of the body 320 facing the surface to be machined can be equipped with a sanding component (such as sandpaper), and the input component 321 can be rotated relative to the body 320 under the driving of the output component 313. To drive the body 320 to work.
  • the main body portion 31 further includes a first connecting member 314, and the input assembly 321 includes a second connecting member 322 that cooperates with the first connecting member 314, wherein the first The connector 314 is rotatable with the second connector 322 under the drive of the motor 312.
  • the second connecting member 322 in this embodiment is not fixedly disposed with other components of the input component, that is, it is not fixedly disposed with the eccentric component in the input component 321 , and the second connecting component 322 can be opposite to the second connecting component 322 .
  • the eccentric element rotates.
  • the operable connecting member in this embodiment is the second connecting member 322, and the operator can only operate the second connecting member 322 after uncovering the sandpaper from under the sharpening portion 32, preferably, in order to make the first connecting member
  • the connection between the 314 and the second connecting member 322 is reliable and stable, and the first connecting member 314 and the second connecting member 322 are connected by screwing.
  • the first connecting member 314 is provided with an external thread 3140 near one end of the input member 321
  • the first connecting member 314 is provided with a concave threaded hole 3141 near one end of the second connecting member, and the second connecting member 322 is threaded.
  • the output assembly 313 includes an output shaft 3135 that is fixedly coupled to the motor 312 and coaxially driven by the motor 312.
  • the output shaft 3135 is fixedly coupled to the first connector 314, and the first connector 314 passes the input member 321 through the screw 3220. Fixed with the first connector 314 such that the output shaft 3135 transmits torque to the input assembly 321.
  • the output assembly 313 may further include an output portion 3133 fixedly coupled to the output shaft 3135.
  • the input assembly 312 includes an input portion 3210 that cooperates with the output portion 3133. It can be understood that when the output assembly 313 does not include the output portion 3133 described above and/or the input assembly 321 does not include the input portion 3210 described above, the input assembly 321 may rotate together under the action of the screw 3220 when the screw 3220 is tightened. Thereby, the body 320 is caused to move together, and therefore, the body 320 may interfere with the tool for inserting the screw 3220 from the lower opening 3203 of the body.
  • the diameter of the screw portion of the screw 3220 is small, the reliability and durability at the time of torque transmission are poor, and the reliability of the torque transmission can be ensured by providing the above-described output portion 3133 and the input portion 3210.
  • FIG. 32-33 illustrate a sander 40 of another configuration of the present invention, including a body portion 41 and a sharpening portion 42, the body portion 41 including a housing 410, a motor 412 located within the housing 410, and a motor 412 for rotation.
  • the sharpening portion 42 includes a body 420 and an input assembly 421 located within the body 420.
  • a side of the body 420 facing the surface to be machined can be mounted with a sanding component (such as sandpaper), and the input component 421 can be rotated relative to the body 420 by the output component 413.
  • a sanding component such as sandpaper
  • the main body portion 41 further includes a first connecting member 414
  • the input assembly 421 includes a second connecting member 422 that cooperates with the first connecting member 414, wherein A connector 414 can be rotated with the second connector 422 under the drive of the motor 412.
  • the first connecting member 414 and the second connecting member 422 are connected by screwing.
  • the first connecting member 414 is provided with an external thread 4140 near one end of the second connecting member 422.
  • the second connecting member 422 is provided as a mounting hole.
  • the mounting hole is provided with an internal thread 4220 that cooperates with the external thread 4140.
  • the middle output assembly 413 includes a first drive wheel 4131 that is fixedly coupled to the motor 412 and that is coaxially driven to rotate by the motor 412, and a second drive wheel 4132 that is driven to rotate by the first drive wheel 4131, and is fixedly coupled to the second drive wheel 4132 and
  • the output shaft 4135 is coaxially driven with the second driving wheel 4132.
  • the output shaft 4135 is fixedly connected or integrally provided with the first connecting member 414 to transmit the output torque to the first connecting member 414.
  • the first connecting member 414 further The torque is transmitted to the input member 421 provided with the internal thread 4220 by the screw structure to drive the input assembly 421 to rotate, that is, as in the third embodiment described above, the engagement of the threaded rod 4140 with the mounting hole achieves both the main body portion 41 and The axial coupling action of the sharpening portion 42 in turn enables torque transfer between the body portion 41 and the sharpening portion 42.
  • the embodiment further provides another operating mechanism 419 for driving the first connecting member 414 for rotation.
  • the operating mechanism includes an operating member 4190, a second elastic member 4191 and a pivoting shaft 4192, and the operating member 4190 is pivoted. Rotation of the rotating shaft 4192 enables connection or disconnection of the operating member 4190 with the first connecting member 414.
  • 32 is a view showing a state in which the operating member 4190 is disconnected from the first connecting member 414
  • FIG. 33 is a view showing a state in which the operating member 4190 is connected to the first connecting member 414.
  • FIGS. 32 and 33 of the present embodiment do not show the locking mechanism.
  • the setting can be set with reference to the setting mode of the other embodiments described above.
  • the locking of the first connecting member or the second connecting member may be performed in other manners, such as by inserting a slot in the housing or the body through the insertion slot of the external stop member. Internally, thereby achieving circumferential locking of the first connector or the second connector.
  • the present invention is not limited to the embodiments in the foregoing embodiments, and the structures between the different embodiments that have been shown may be combined with each other, and those skilled in the art may make other changes under the enlightenment of the technical essence of the present invention, but The functions achieved by the same or similar to the present invention are intended to be covered by the scope of the present invention.

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Abstract

一种打磨工具，包括：主体部（11），主体部（11）包括壳体（110）、马达（112）、以及由马达（112）驱动旋转的输出组件（113）；以及打磨部（12），打磨部（12）可拆卸地连接至主体部（11），打磨部（12）包括本体（120）、以及相对于本体（120）旋转的输入组件（121）；主体部（11）还包括第一连接件（114），输入组件（121）包括第二连接件（122），第一连接件（114）可操作地相对于第二连接件（122）运动以使两者配接，从而使得输出组件（113）能够驱动输入组件（121）以带动本体（120）运动。打磨工具的结构简单，操作方便。还公开了一种打磨工具的主体部和一种打磨工具的打磨部。

Description

打磨工具及其主体部和打磨部 技术领域
本发明涉及一种手持式动力工具，尤其是具有底板更换结构的砂光机。
背景技术
现有的砂光机包括圆砂机和平板砂等，其中圆砂机的输出轴驱动打磨底板作圆砂运动，即做公转加自转的轨道运动，用于磨削较大量的材料,例如用于粗磨。平板砂的打磨底板的自转运动被限制，因此，打磨底板进行摆动，适用于磨削较小量的材料，例如用于精细加工或精加工。
当打磨底板做摆动时，不同的底板形状也可以适应不同的操作工况。如长方形的板砂底板可用于常规的操作工况的打磨；而三角形的板砂底板在打磨边角区域的工作面时显然更具有优势；还有带有手指形状的异形底板，更适合打磨区域狭小的工作面。
能够适应多种操作工况的砂光机给用户带来的便利使其在市场中受到广泛的青睐。此处的多种操作工况包括精磨和粗磨的操作工况需求，或者不同底板形状能满足不同打磨区域的操作工况。以下将能够适应多种操作工况的砂光机成为多功能砂光机。
在多功能砂光机中，为了获得多种功能，更换底板是一种常见的方式。圆砂底板与砂光机主机安装时，底板没有摆动脚的限制，做公转加自转的轨道运动；板砂底板与砂光机主机安装时，底板在摆动脚的限制下，做只有公转运动的轨道运动。不同形状的底板通过底板更换结构自然能够使多功能砂光机满足不同打磨区域的操作工况。
中国专利申请CN103506923A和美国专利US8821220B2揭示了一种底板更换结构。底板包括用于安装砂纸的底板本体和位于底板本体内由马达驱动且能够相对于底板本体转动的输入组件。底板与主体沿马达轴轴向锁定是通过连接机构来实现，连接机构包括位于主体的一个异形锁定钢丝以及位于底板上与异形锁定钢丝对应的卡槽，由于连接机构的锁定钢丝和卡槽是不旋转的，主体部和底板之间通过扭矩传递机构来实现。但底板本体和输入组件在工作时都是运动的，所以底板还需要包括一个用于设置卡槽的固定的基体，因此，底板中除了地板本体和输入组件之间需要设置轴承外，基体和输入组 件之间也需要设置轴承以使得输入组件能够相对于基体运动，该种底板更换结构，使得底板结构复杂、且成本高。
基于现有技术的现状，有必要对多功能砂光机的底板更换结构进行改进，以克服现有技术中存在的问题。
发明内容
本发明提供一种底板更换结构简单、方便的打磨工具。
本发明提供的一个技术方案是：一种打磨工具，包括：主体部，所述主体部包括壳体、设置于所述壳体内的马达，以及由所述马达驱动旋转的输出组件；以及打磨部，所述打磨部可拆卸地连接至所述主体部，所述打磨部包括本体、以及相对于所述本体绕第一旋转轴线旋转的输入组件；所述主体部还包括相对所述壳体活动设置的第一连接件，所述输入组件包括第二连接件，以及相对所述第一旋转轴线偏心设置的偏心元件，所述本体与所述偏心元件相连接，所述第一连接件可操作地相对于所述第二连接件运动以使所述第一连接件和所述第二连接件配接，从而使得所述输出组件能够驱动所述输入组件绕第一旋转轴线旋转以带动所述本体运动。
优选地，当所述第一连接件和第二连接件配接，所述打磨部沿轴向与所述主体部不可分离。
优选地，所述打磨工具还包括锁定机构，所述锁定机构能够使所述第二连接件相对所述壳体固定。
优选地，所述锁定机构包括相对于所述壳体能够在锁定位置和释放位置运动的第一锁定件以及与所述第二连接件不可相对转动设置的第二锁定件，当位于锁定位置时，所述第一锁定件与所述第二锁定件配接，所述第二连接件相对所述壳体固定；当位于释放位置时，所述第一锁定件与所述第二锁定件相互分离，所述第二连接件能够相对所述壳体转动。
优选地，所述第一锁定件位于所述主体部，所述第二锁定件位于所述打磨部。
优选地，所述第一连接件包括第一支撑部，所述第二连接件包括用于与所述第一支撑部配接的第二支撑部。
优选地，所述第一连接件外侧设置有空心轴，所述空心轴相对所述输出组件固定设置，所述空心轴靠近所述打磨部的一端设置有第一支撑部，所述第二连接件包括用于与所述第一支撑部配接的第二支撑部。
优选地，所述第二支撑部设置为凹槽，所述第一支撑部的外径与所述凹 槽的内径相匹配。
优选地，所述第一支撑部的中心轴线与所述第一旋转轴线共线设置。
优选地，所述第一连接件上设置有第一配接部，所述第二连接件包括用于与所述第一配接部配接的第二配接部。
优选地，所述第一配接部上设置有外螺纹，所述第二配接部设置成安装孔，所述安装孔内设置有与所述外螺纹配接的内螺纹。
优选地，所述第一配接部的中心轴线与所述第一旋转轴线共线设置。
优选地，所述输出组件包括输出部，所述输入组件包括用以与所述输出部配接的输入部，当所述第一连接件和所述第二连接件配接时，所述输出部与所述输入部配接以将所述马达的旋转运动传递至所述输入组件。
优选地，所述输入部包括若干个绕周向分布的第二棘齿，所述输出部包括若干个与所述第二棘齿啮合传动的第一棘齿。
优选地，所述第一连接件的旋转轴线与所述第一旋转轴线共线设置。
优选地，所述主体部包括相对所述壳体固定设置的弹性摆动脚，所述打磨部设置有与所述弹性摆动脚配接的限位脚。
优选地，所述输出组件包括由马达驱动的第一驱动轮，以及由第一驱动轮驱动的第二驱动轮，且所述第一驱动轮的旋转轴线与所述第二驱动轮的旋转轴线平行并间隔设置。
优选地，所述打磨工具还包括与所述第二驱动轮相对固定设置的第二风扇，以及与所述马达同轴设置且位于所述马达靠近打磨部一端的第一风扇。
优选地，所述壳体上设置有至少一个进风口和至少一个出风口，所述进风口位于所述马达远离所述打磨部的一端，所述出风口靠近所述第二风扇设置，外部气流在所述第一风扇的作用下从所述进风口进入壳体后流经所述马达，并在所述第二风扇的作用下从所述第二出风口流出。
本发明中采用了该技术方案，使得打磨部结构简单、且打磨部与主体部之间的拆装方便。
本发明还提供了一种方便拆装打磨部的主体部。
本发明提供的一个技术方案是：一种打磨工具的主体部，用于与可拆卸的打磨工具的打磨部连接，所述主体部包括：壳体；收容于所述壳体的马达，用以提供旋转动力；输出组件，能够在所述马达的驱动下相对于所述壳体旋转；所述主体部还包括活动的设置于所述壳体的第一连接件，所述第一连接件用于与所述打磨部配接并且能够在所述输出组件的驱动下相对所述壳体旋 转。
优选地，所述第一连接件包括第一配接部，所述第一配接部上设置有外螺纹。
优选地，所述主体部还包括套设于所述第一连接件的空心轴，所述第一连接件可操作地相对于所述空心轴运动。
优选地，所述输出组件包括输出部，所述输出部与所述空心轴固定连接连接。
优选地，所述主体部还包括锁定机构，所述锁定机构具有锁定状态和解锁状态，当位于锁定状态时，所述锁定机构能够阻止所述空心轴相对所述壳体转动，当位于解锁状态时，所述空心轴能够相对于所述壳体转动。
优选地，所述主体部还包括操作机构，所述操作机构包括能够控制锁定机构在锁定状态和解锁状态切换的操作件。
优选地，所述操作件能够在第一位置和第二位置之间转换，位于第一位置时，所述操作件至少部分伸出所述壳体，位于第二位置时，所述操作件不超出所述壳体的外轮廓。
优选地，当所述操作件切换至第一位置时，所述锁定机构切换至锁定状态，当所述操作件切换至第二位置时，所述锁定机构切换至解锁状态。
优选地，所述锁定机构包括相对所述空心轴固定设置的第一锁定件，相对所述壳体活动设置的第二锁定件，以及位于壳体和第二锁定件之间的第一弹性件；当所述操作件位于第一位置时，所述第一弹性件处于释放状态，所述第一锁定件与所述第二锁定件相互配接；当所述操作件处于第二位置时，所述操作件抵接所述第二锁定件以使所述弹性元件处于压缩状态，所述第一锁定件与所述第二锁定件相互分离。
优选地，所述第一连接件包括传动元件，所述操作件通过所述传动元件可操作地驱动所述第一连接件运动。
优选地，所述操作机构还包括相对壳体能够绕第二旋转轴线旋转的基座，所述操作件能够相对所述基座在所述第一操作位置和第二操作位置之间枢转，当所述操作件处于第一操作位置时，所述操作件与传动元件分离，当所述操作件处于第二操作位置时，所述操作件与传动元件配接，从而能够驱动所述第一连接件绕所述第二旋转轴线旋转。
优选地，所述输出组件包括输出部，所述输出部能够绕第三旋转轴线旋转，所述输出部包括若干个绕所述第三转轴线周向分布的棘齿。
优选地，所述第三旋转轴线与所述马达的轴线平行且间隔设置。
优选地，所述壳体上设置与所述马达轴线呈一定角度延伸的握持手柄，所述马达的轴线与所述握持手柄分别位于所述第三旋转轴线相对的两侧。
优选地，所述输出组件包括输出轴，所述输出轴与所述第一连接件同轴设置并且固定连接。
优选地，所述主体部还包括两对分别呈对角设置的限位脚。
本发明还提供方便与打磨工具的主体部配接的打磨部。
本发明提供的一个技术方案是：一种打磨工具的打磨部，用于可拆卸地与打磨工具的主体部配接，所述打磨部包括：本体；至少部分收容于所述本体中的输入组件；所述输入组件能够相对所述本体绕第一旋转轴线旋转，所述输入组件包括偏心元件，所述偏心元件相对所述第一旋转轴线偏心设置，所述本体与所述偏心元件相连接，所述输入组件还包括与所述偏心元件相对固定设置的第二连接件，所述第二连接件能够与所述主体部配接。
优选地，所述本体包括套设于所述第二连接件外侧的罩体以及与所述罩体轴向固定且位于罩体下方的板状本体，所述板状本体用以安装打磨元件，所述第二连接件包括第二配接部以及与第二配接部连接的第二支撑部。
优选地，所述第二配接部设置成沿旋转轴线方向延伸的安装孔，所述第二支撑部设置成沿旋转轴线方向延伸的凹槽，所述安装孔的下端相对于所述凹槽的下端更靠近所述板状本体。
优选地，所述第二连接件包括沿第一旋转轴线方向延伸的安装孔，所述安装孔具有内螺纹。
优选地，所述第二连接件还包括沿第一旋转轴线方向延伸的凹槽，所述凹槽与所述安装孔连通。
优选地，所述凹槽的外径大于所述安装孔的外径。
优选地，所述第二支撑部的轴向尺寸和外径尺寸的比值在0.33-1.7之间。
优选地，所述凹槽的中心轴线与所述安装孔的中心轴线与所述第一旋转轴线共线。
优选地，所述输入组件还包括用于传递扭矩的输入部，所述输入部相对于所述第二连接件固定设置。
优选地，所述输出部包括若干个绕第一旋转轴线周向分布的棘齿。
优选地，输入组件还包括平衡块，所述偏心元件的中心轴线位于所述第一旋转轴线的一侧，所述平衡块位于与所述中心轴线相对的所述第一旋转轴 线的另一侧。
优选地，所述平衡块位于所述偏心元件远离所述输入部的一端。
优选地，所述本体包括套设于所述第二连接件外侧的罩体以及与所述罩体轴向固定的板状本体，所述板状本体用以安装打磨元件，所述板状本体可设置成圆形、矩形或不规则形状。
附图说明
图1是本发明第一实施方式中操作件处于闭合状态的示意图。
图2是本发明第一实施方式中主体部与打磨部配接处的结构示意图。
图3是图1中A部分的局部放大图。
图4是本发明第一实施方式中操作件处于打开状态的示意图。
图5是图1中C部分的局部放大图。
图6是本发明第一实施方式中输入组件与大端面抵接的示意图。
图7是本发明图1中B部分的局部放大图。
图8是本发明第一实施方式中打磨工具内部风道走向示意图。
图9是本发明第一实施方式中打磨部与弹性元件的位置关系示意图。
图10是本发明第一实施方式中限位机构的结构示意图。
图11是本发明第一实施方式中限位柱与限位孔配接位置的剖视图。
图12是本发明另一实施方式的限位机构的结构示意图。
图13是本发明与另一实施方式的限位机构配接的打磨部的示意图。
图14是本发明另一实施方式的限位机构与打磨部配接后的局部剖视图。
图15是本发明第一实施方式中打磨工具内部结构示意图。
图16是本发明第一实施方式中锁定机构的示意图。
图17是本发明操作件在闭合状态时操作机构的示意图。
图18是本发明操作件在操作状态时操作机构的示意图。
图19是本发明第一实施方式中打磨工具外部风向的示意图。
图20是本发明第二实施方式中打磨工具外部风向的示意图。
图21是本发明第二实施方式中打磨工具内部风道走向示意图。
图22是本发明第二实施方式中打磨工具的主体部与打磨部未配接状态剖视图。
图23是本发明第二实施方式中打磨工具的主体部与打磨部配接状态剖视图。
图24是图22中D部分的局部放大图。
图25是本发明第二实施方式中锁定机构的结构示意图。
图26是本发明第三实施方式的打磨工具中锁定机构处于锁定状态时的结构示意图。
图27是本发明是本发明第三实施方式的打磨工具中锁定机构处于解锁状态时的结构示意图。
图28是本发明是本发明第四实施方式中中打磨工具的主体部与打磨部未配接状态。
图29是图28中F-F方向的剖面视图。
图30是本发明第五实施方式中锁定机构处于解锁状态剖视图。
图31是本发明第五实施方式中锁定机构处于锁定状态剖视图。
图32是本发明第六实施方式操作件与第一连接件断开的剖视图。
图33是本发明第六实施方式中操作件与第一连接件连接的剖视图。
具体实施方式
下面将参考附图更加全面地描述一些示例性的实施例。在所有附图中相同的附图标记代表相同的部件。
参见图1-图3，附图标记10表示总的示例性手持工具。下文中具体以砂光机10作为示例性手持式动力工具进行说明，砂光机10包括主体部11以及打磨部12，主体部11包括壳体110、位于壳体110内的马达112以及由马达112驱动旋转的输出组件113。打磨部12包括本体120以及位于本体120内的输入组件121，本体120面向被加工表面的一侧能够安装打磨元件(如砂纸)，输入组件121能够在输出组件113的驱动下相对于本体120旋转，以带动本体120进行工作。为实现打磨部12与主体部11沿马达112轴向不可分离的连接，主体部11还包括第一连接件114，打磨部12包括与第一连接件114配合的第二连接件122，当第一连接件114和第二连接件122配接以使所述打磨部12和所述主体部11沿马达112轴向不可分离地连接时，第一连接件114和第二连接件122能够随输入组件121一起旋转。为使得第一连接件114和第二连接件122连接可靠、稳定，优选地，第一连接件114和第二连接件122通过螺纹连接的方式实现连接。
本实施例中，输出组件113包括与马达112同轴设置且由马达112驱动旋转的第一驱动轮1131以及由第一驱动轮1131驱动且旋转轴线与第一驱动轮1131旋转轴线间隔设置的第二驱动轮1132，为了减小第一驱动轮1131和第二驱动轮1132在扭矩传递时的噪音和震动，优选地，第一驱动轮1131和 第二驱动轮1132之间通过传动带传动的方式进行动力传递。本实施例中，为实现对第二驱动轮1132进行更好的支撑，主体部11还包括设置于壳体110内的连接轴115，第二驱动轮1132套设于连接轴115外侧以通过连接轴115实现对第二驱动轮1132的支撑。本实施例中，第二驱动轮1132固定的套设于连接轴115的外侧以带动连接轴115转动，连接轴115通过支撑轴承116可转动的设置于壳体110。可以理解地，在其它实施例中，连接轴115也可以设置为与壳体110固定连接，即不可转动的固定于壳体110，同时，第二驱动轮1132设置成可转动的与连接轴115进行连接，以通过连接轴115实现对第二驱动轮1132的支撑。为了实现将输出组件113的输出扭矩传递至输入组件121，优选地，输出组件113还包括与第二驱动轮1132固定连接的输出部1133，输入组件121包括与输出部1133配合的输入部1210。在其中一种实施方式中，输出部1133和输入部1210设置为端面棘齿，在其他实施方式中，输出部1133和输入部1210还可以设置成为能够传递扭矩的其他形式，如扁方结构等。通过输出部1133与输入部1210的配合，输出组件113将扭矩转传递至输入组件121以带动输入组件121相对于本体120转动。
可以理解地，在其他实施例中，输出部1133还可以设置在连接轴115的外侧，第二驱动轮1132通过驱动连接轴115转动，然后再由连接轴115驱动输出部1133进行转动，也即连接轴115作为输出组件113的一部分，作为驱动输出部1133的驱动轴。
继续参见图1，输入组件121沿轴向至少部分设置成偏心元件124，偏心元件124的中心轴线X1与输入组件121的旋转轴线X0间隔设置，也即偏心元件124的中心轴线X1与其旋转轴线X0之间存在偏心距离e。本体120包括用于安装砂纸的板状本体1202以及与板状本体1202固定连接的罩体1201，其中罩体1201通过安装轴承123设置于偏心元件124的外侧，以通过偏心元件124的转动带动本体120运动。可以理解地，由于偏心元件124的旋转轴线X0(也即输入组件的旋转轴线X0)与偏心元件124的中心轴线X1间隔设置，也即偏心元件124相对于其旋转轴线X0质量呈不对称分布，所以偏心元件124在旋转时容易晃动，为了补偿偏心元件124相对于其旋转轴线X0的在旋转时质量不平衡，输入组件121还包括平衡块1211，所述偏心元件的中心轴线位于所述输入组件的旋转轴线X0的一侧，所述平衡块1211位于与所述中心轴线相对的所述第一旋转轴线X0的另一侧。。可以理解的是，不同的打磨部12，如圆砂打磨部或板砂打磨部，由于各自工况的不同，圆砂 打磨部或板砂打磨部的偏心距离e也不同。因此，补偿不同打磨部的偏心元件124所需的平衡块1211的质量也不同。本实施通过将平衡块1211设置于底板内，使得不同的打磨部(如圆砂打磨部或板砂打磨部)能够有各自独立的平衡块1211，以达到最佳减震效果。可以理解地，平衡块1211可以设置于安装轴承123的下方，也可以位于安装轴承123的上方，其也可以既位于安装轴承123的下方又位于安装轴承的下方。
参见图1、图2、图5和图6，本实施例中，第一连接件114包括位于其下方的用于与第二连接件122连接的第一配接部1141，优选地，第一配接部1141设置有外螺纹1140，第二连接件122包括与第一配接部1141配接的第二配接部1221，优选地，第二配接部1221设置为能够收容第一配接部的1141的安装孔，安装孔的至少部分内周面设有与所述外螺纹1140配接的内螺纹1220。本实施例中，连接轴115为空心轴，第一连接件114至少部分位于空心轴115内，为防止第一连接件114从空心轴内掉落，第一连接件114的上端设有突缘1142。本实施例中，为保证主体部11和打磨部12的同轴度，也即第一连接件114或连接轴115和输入组件121的旋转轴线之间的同轴度以降低砂光机10在工作时的震动，所述第二连接件122还包括支撑部1222，优选地，第二支撑部1222所述第二支撑部1222设置成沿旋转轴线方向延伸的凹槽，连接轴115的下方形成与凹槽外径基本相同以用于伸入凹槽内的第一支撑部1152。连接轴115延伸至安装孔的长度L1，也即第一支撑部1152的轴向尺寸为L1，且L1在4mm-30mm之间，优选地，L1在11.25mm-13.75mm之间，更为优选地，L1为12.5mm。第一支撑部1152和和第二支撑部1222(凹槽)之间为小间隙配接，也即第一支撑部1152的外径尺寸与第二支撑部1222(凹槽)的外径尺寸基本相同，以下简称配接直径D1，配接直径D1在7mm至12mm之间，优选地，配接直径D1在8.55mm至10.45mm之间，更为优选地，配接直径D1为9.5mm。
可以理解地，当配接直径D1为某一特定值时，配接长度L1越大则配接效果越好，也即同轴度会越好。但L1越长，则整机高度越高。参见图6，本实施例中，为了使得配接长度较小时，整机的同轴度依然能得到很好的得到保证，主体部11设有与输入组件121的上端面抵接的抵接端面，且抵接端面的直径D2大于D1。本实施例中，抵接端面为第二驱动轮1132与输入组件121相抵接的端面，可以理解地在其它实施例中，抵接端面也可以为与第二驱动轮1132固定连接的并与输入组件121相抵接的端面。本实施例中，通过 采用大端面抵接，配接长度L1与配接直径D1的比值做小到0.33，其可以保证D1为某一特定值时，将配接长度L1做短，当然，可以理解地，在保证D2大端面前提下，L1/D1的值越大，越有利于同轴度的稳定性。。
本实施例中，打磨部12可以为如图1、图2以及图8示出的圆砂打磨部以及如图9、图13以及图15所示的板砂打磨部，其中圆砂底板的板状本体1202呈圆形，板砂底板的板状本体1202呈矩形，操作者可根据不同的打磨需求，择一地将圆砂打磨部或板砂打磨部与主体部11进行配接。圆砂打磨部的本体120在打磨时既进行公转，同时，本体120因为安装轴承123，会在偏心元件124的作用下进行自转，也即圆砂底板进行自转和公转的轨道运动，因此，当操作者需要去除大量的磨削材料时，可将圆砂底板安装至主体部11。本实施例中，板砂打磨部可以为其板状本体为1/4砂大小的打磨部，或其板状本体为1/3大小的打磨部，需要说明的是此处所述的1/3砂底板以及1/4底板指的是板砂打磨部的板状本体1202与业界所熟知的砂纸规格(尺寸228mm×280mm)的3等分或4等分大小相对应或基本相同。其中，板砂打磨部通过弹性夹持件将砂纸固定于板状本体1202，圆砂底板通过毛毡等方式将砂纸固定于板状本体。当然可以理解地，板砂底板也可以采用毛毡等方式将砂纸固定。
需要说明的是，板砂底板(1/3砂底板以及1/4底板)的板状本体1202成矩形，若板砂组件的板状本体1202在输入组件121的作用下既进行公转又进行自转时，其中，高速自转的矩形板状本体1201的四个角易造成危险，所以砂光机10还包括用于限制板砂底板进行自转的限位机构117。
参见图9-图14，限位结构117包括限位基板1170，设置于限位基板1170上的限位脚1171，本实施例中，每一个限位脚1171包括多根挠性柱，优选地，挠性柱的数量为偶数，更为优选地，挠性柱的数量为4或6。本实施例中，限位机构117位于上述主体部11，这样不需要将每一个板砂或其他需要限制其自转的打磨底板分别设置限位结构。限位脚1171的上端可拆卸的固定于壳体110，以使得限位脚1171因长期受力变形而破损后能够进行更换。优选地，限位脚1171的上端通过螺钉与机壳相连，以使得限位脚1171能够稳定的固定于壳体110，不容易从壳体110中自动脱落。参见图2，由于限位机构117的上端被壳体110覆盖，也即限位脚1171的上端并非裸漏于壳体110的外部，另外，限位机构117的下端被限位基板1170挡住，致使螺丝批等工具无法伸入壳体110内部，使得限位机构117的安装困难。本实施中，每一 个限位脚1171的多个挠性柱围设成中空的通孔且通孔贯通限位基板1170，以使得操作者能够通过从基板1170的下方通过通孔将螺钉拧入。限位基板1170背离限位脚1171的一侧面上设有限位柱1172，且上述的板砂打磨部的本体120上上设有与限位柱1172配接的限位孔1203，以限制板砂底板进行自转，优选地，限位孔1203和限位柱1172之间还设有弹性元件900。参见图11，弹性元件900包括位于基板1170和限位孔1203的开口之间的第一弹性件901，用于隔离限位孔1203和限位机构117沿上下方向的震动，也即隔离本体120和限位机构117之间沿上下方向或轴向的震动。弹性元件900还包括位于限位柱1172和限位孔1203的侧壁之间的第二弹性元件902，用于隔离限位柱1172和限位孔1203沿径向的震动，也即隔离本体120和限位机构117之间径向上的震动。参见图9，本实施例中，由于砂光机10的打磨部12可以为多种(如圆砂打磨部或板砂打磨部)，需要设置限位机构117的板砂打磨部，除了上述所说板状本体为1/3砂形状和1/4砂底板外，还包括另一种其板状本体近似呈熨斗状的打磨部(也称之为老鼠砂)。当每个板砂底板上均设有4个弹性元件时，则需要较多数量的弹性元件，成本较高，另外由于弹性元件900和限位孔12之间的配合多为过盈配合，弹性元件900安装比较困难，因此，弹性元件900安装的数量越多，装配也较为困难。
参见图12-图14，本发明还提供了另一种结构的限位机构117’，与上述实施例中限位机构117相同的是，限位结构117’包括限位基板1170’，设置于限位基板1170’上的限位脚1171’，每一个限位脚1171’包括多根挠性柱，限位机构117’通过螺钉等可拆卸的固定于主体部11的壳体110，每一个限位脚1171’的多个挠性柱围设成中空的通孔且通孔贯通限位基板1170’。与上述实施例中不同的是，在该实施例中，限位柱1172’设置于板砂打磨部，限位脚1171’的多个挠性柱围设成的中空通孔为限位孔1203’，且弹性元件900’设置于中空通孔靠近限位基板1170’的一端。参见图14，与上述实施例中的弹性元件900结构类似，该实施例中弹性元件900’包括位于本体120和限位孔1203’的开口之间的第一弹性件901’以隔离本体120和限位机构117’沿上下方向的震动；弹性元件900’还包括位于限位柱1172’和限位孔1203’的侧壁之间的第二弹性元件902’以隔离限位柱1172’和限位孔1203’沿径向的震动，也即隔离本体120和限位机构117’之间径向上的震动。
参见图1，当打磨部12连接至主体部11或与主体部11分离时，需实现第一连接件114相对于第二连接件122转动，但通过上述对主体部11和打磨 部12的结构描述可知，当第一连接件114在操作下转动时，第一配接部1141的外螺纹1140与第二配接部1221的内螺纹1220相互作用，会使得输入组件121一起转动，输入组件121通过输入部1210以及输出部1133进一步带动输出组件113以及连接轴115一起转动，从而无法实现螺纹杆1140和安装孔之间的相对转动，第一配接部1141的外螺纹1140与第二配接部1221的内螺纹1220无法旋紧或松开。参见图1、图15和图16，本发明砂光机10还包括锁定机构118，锁定机构118能够实现对输入组件121的周向锁定以实现第一连接件114相对于第二连接件122进行转动。优选地，锁定机构118设置于主体部11，锁定机构118具有锁定状态和解锁状态，当锁定机构118处于锁定状态时，锁定机构118对输入组件121进行周向锁定，也即输入组件121不能够相对壳体110进行转动，当锁定机构118处于解锁状态时，锁定机构118解除对输入组件121的周向锁定，也即输入组件121能够相对于壳体110进行转动。
参见图1和图16，本实施例中，为了方便对输入组件121的锁定，锁定机构118通过采用对连接轴115进行周向锁定的方式以周向锁定输入组件121。锁定机构118包括相对于壳体110可活动但不可转动的第一锁定件1181以及与连接轴115固定连接或一体设置的第二锁定件1182，其中，第一锁定件1181能够在第一位置和第二位置之间移动，当第一锁定件1181位于第一位置时，第一锁定件1181与第二锁定件1182配接，也即锁定机构118处于锁定状态，连接轴115被周向锁定。本实施例中通过上述的描述可知，由于第二驱动轮1132固定的套设于连接轴115的外侧以带动连接轴115转动，也即连接轴115与输出组件113之间为不可相对转动的连接，因此连接轴115锁定时，输出组件113也会随之被锁定，周向不能旋转。此外，由于输出组件113和输入组件121之间通过棘齿捏合或传递扭矩，也即输出组件113和输入组件121在周向上不可相对转动，因此，当连接轴115锁定后，输入组件121也会被被周向锁定，因此，第一连接件114可操作地相对于所述第二连接件122转动。当第一锁定件1181位于第二位置时，第一锁定件1181与第二锁定件1182分离，也即锁定机构118处于解锁状态，锁定机构118解除对连接轴115的周向锁定，连接轴115能够相对于壳体110进行转动。
优选地，第一锁定件1181为设置有扁方孔1810的锁定块，第二锁定件1182为外周形状与扁方孔对应的扁方轴段，其中第一锁定件1181能够沿连接轴115的轴向在第一位置和第二位置之间移动。参见图4所示，当第一锁 定件1181由下方的第二位置向上运动至第一位置时，锁定块的扁方孔1810与偏方轴段配接，输入组件121周向被锁定，参见图3所示，当第一锁定件1181由第一位置向下运动至第二位置时，第一锁定件1181的扁方孔脱离扁方轴段，并套设在连接轴115的外侧，由于扁方孔的最小处的孔径大于连接轴115的外径，因此，连接轴115在圆周方向上能够自由转动。可以理解地，第一锁定件1181还可设置为设有其他异形孔的锁定块，如菱形、三角形、六边形或其他不规则的图形，第二锁定件件1182则设置为与上述的异形孔形状相对应的异形轴段，此处不再赘述。
优选地，参见图17-图18，为了方便操作第一连接件114以将打磨部12安装至主体部11，主体部11还包括操作机构119，操作机构119包括用于供操作者握持的操作件1190和基座1191，操作件1190通过枢转轴可枢转的设置于基座1191以在第一操作位置和第二操作位置之间切换。优选地，枢转轴包括固定于操作件1190的第一枢转轴1901和固定于基座1191的第二枢转轴1911，基座1191上设有供第一枢转轴1901转动的第一滑槽1912，操作件1190上设有供第二枢转轴1911运动的第二滑槽(图中未示出)。
参见图1、图3、图4、图17以及图18所示，操作件1190能够在闭合状态的第一位置(参见图1和图17)以及打开状态的第二位置之间切换，需要说明的是，位于第一位置时，所述操作件至少部分伸出所述壳体，位于第二位置时，所述操作件不超出所述壳体的外轮廓，也即处于第一位置时，操作件1190的与握持手柄111基本位于同一水平线上，第二位置时，操作件1190的与握持手柄111之间呈角度放置。操作机构119还包括位于操作件1190以及第一锁定件1181之间的抵接1904，锁定机构118还包括位于第一锁定件1181下方的第一弹性元件1905。参见图3，当操作件1190处于闭合状态时，操作件1190向下方抵压抵接件1904，同时抵接件1904通过第一锁定件1181进一步抵压第一弹性元件1905，因此，第一弹性元件1905被压缩，第一锁定件1181位于下方的第二位置，此时，连接轴115在电源开关1120启动后能够随输入组件121一起在马达112的驱动下进行转动；当操作件1190从图17所示闭合状态在第一弹性元件1905的作用下运动至打开状态时(图中未示出)，抵接件1904以及第一锁定件1181在第一弹性元件1905的作用下向上移动，至使第一锁定件1181向上移动至上述第一位置，因此，锁定块的扁方孔1810与偏方轴段配接，连接轴115被周向锁定，也即输入组件121周向被锁定。
本实施中，为方便对第一连接件114的操作，同时使得砂光机10结构简单，本实施中，操作件1190还能够用于带动第一连接件114进行旋转，当操作件1190位于打开状态后，操作件也即操作件1190处于第一操作位置时，操作件1190仍不能够带动所述第一连接件114进行转动，当操作件1190由第一操作位置绕枢转轴线旋转至第二操作位置时，操作件1190能够带动第一连接件114绕其轴线(也即输入组件121的轴线)进行转动。本实施例中，第一连接件上设有传动元件，参见图3和图4，本实施例中，传动元件为设置于第一连接件114上的第二凸耳1401，操作件包括与第二凸耳1401对应的第一凸耳1903，当操作件1190处于第二操作状态时，第一凸耳1903与第二凸耳1401配接，以使得操作件1190能够带动基座1191以及第一连接件114一起相对于壳体110进行转动，从而使得打磨部12能够与主体部11进行连接或分离。
参见图4，为方便握持，主体部11还包括供握持的握持手柄111，握持手柄111的下方设有供握持时手指弯曲伸入的凹槽1110。另外握持手柄111以及凹槽1110于远离马达的一端设有供电单元，优选地，本实施例中供电单元为电池包13，电池包13可拆卸的与壳体110进行连接。可以理解地，在其他实施例中供电单元还可以采用交流供电单元。
参见图19，砂光机10还包括两个冷却部，以及一个导尘部63，两个冷却部分别为分别为第一冷却部61和第二冷却部62，两个冷却部和一个导尘部分别包括设置在壳体110内的风扇，以及进风口和出风口，即第一冷却部61包括第一风扇610(见图4)，第一进风口611和第一出风口612，第二冷却部62包括第二风扇620，第二进风口621和第二出风口622，导尘部63包括第三风扇630，第三进风口631和第三出风口632。第一风扇610位于马达112远离打磨部12的一端的离心风扇，第一进风口611位于马达靠近打磨部12的一端以及远离打磨部12的一端，也即第一进风口611沿马达113轴线方向分布。第一出风口612在与第一风扇610对应区域内，也即位于马达113上、下两进风口之间。本实施例中，优选地，第一风扇610位于马达112中定子和转子的上方，从靠近打磨部12一端的第一进风口611进入的在第一风扇610的作用下流经马达的定子、转子部分，后从第一出风口612流出，从远离打磨部12一端的第一进风口进风后流经马达112中的换向器(位于风扇的上方)后从第一出风口612流出。因此，第一冷却部61能够将马达112产生的热量带走以实现对马达112的冷却。本实施例中，第二风扇620与第 二驱动轮1132固定连接并由第二驱动轮1132驱动旋转，且第二风扇620位于第二驱动轮1132下方的以冷却第二驱动轮113以及位于第一驱动轮1131和第二驱动轮1132之间的传动传动带等，第二进风口621和第二出风口622位于壳体110上与壳体110内的第二风扇620对应区域，且优选地，第二进风口621和第二出风口622在与第二风扇620对应区域的壳体110上沿上、下方向设置。第三风扇630位于打磨部12的上方且紧邻打磨部12的上端部分设置，优选地，如图4所示，第三风扇630与第二风扇620共用同一轮毂，换句话说轮毂的上方为第二风扇620、轮毂的下方为第三风扇630。第三进风口位于631位于板状本体120面向砂纸的一侧面以及砂纸上，第三出风口632为与第三风扇630连通的集尘出口以将打磨部12在打磨过程中产生的碎屑、灰尘经第三风扇630吹送至集尘袋或集尘盒内。
参见图20-图23，为本发明另一结构的砂光机10’(以下简称第二个实施例)，同上述的砂光机10结构相同，其包括主体部11’以及打磨部12’，主体部11’包括壳体110’，位于壳体110’内的马达112’以及由马达112’驱动旋转的输出组件113’。打磨部12’包括本体120’以及位于本体内的输入组件121’，本体120’面向被加工表面的一侧能够安装打磨元件(如砂纸)，输入组件121’能够在输出组件113’的驱动下相对于本体120’旋转，以带动本体120’进行工作。为了实现打磨部12’与主体部11沿马达轴向不可分离的连接，主体部11’还包括第一连接件114’，打磨部12包括与第一连接件114’配合的第二连接件122’，其中，第一连接件114’能够在马达112’的驱动下同第二连接件122’一起旋转。优选地，为了使得第一连接件114’和第二连接件122’连接可靠以及稳定，优选地，第一连接件114’和第二连接件122’通过螺纹连接的方式实现连接，也即第一连接件114’设有第一配接部1141’，第二连接件122’上设有与第一配接部1141’配合的第二配接部1221’。优选地，第一配接部1141’设置有外螺纹1140’，优选地，第二配接部1221’设置为能够收容第一配接部的1141’的安装孔，安装孔的至少部分内周面设有与所述外螺纹1140’配接的内螺纹1220’。本实施例中输出组件113’包括与马达112’同轴设置且由马达112’驱动旋转的第一驱动轮1131’以及由第一驱动轮1131’驱动且旋转轴线与第一驱动轮1131’旋转轴线间隔设置的第二驱动轮1132’，对于第二驱动轮1132’支撑采用可转动设置于壳体110’内的空心的连接轴115’。本实施例与上述的实施例的砂光机10结构主要不同的是，本实施例中输入组件121’的旋转轴线位于马达112’轴线与电池包13’之间。由于砂光机10’中马达112’以及 电池包13’相对于整机中的其他部分均较重，因此，整机的重心位于马达112’以及电池包13’之间，这样整机的重心既能够靠近握持手柄111’，又能够靠近输入组件121’的旋转轴线，使得握持方便的同时，整机的输出也较为稳定。另外，通过对上述实施例的描述可知，为配接板砂底板，砂光机10’的主体部11’需要设置限位机构，为了减小整机在工作时的震动，限位机构通常包括多个限位脚。在上述实施例中，由于输入组件121的旋转轴线位于马达112远离握持手柄111一侧，这样整机的长度会因为限位脚而增长，而本实施例中，由于输入组件121’的旋转轴线位于马达112’靠近握持手柄111’的一侧，这样限位机构或限位脚则会整体向靠近电池包13’方向移动，有利于整机长度的减小。
在上述的实施例中，马达112的冷却完全由第一冷却部61完成，没有利用到第二冷却部的大风扇620，因此，马达112冷却效果差。为了达到对马达112较好的冷却效果，本实施例提供了另一种与上述实施例不同的冷却结构。参见图20和图21，本实施中砂光机10’的冷却部包括用于冷却马达112’的第一冷却部(图中未标出)和用于冷却第二驱动轮1132’以及连接第一驱动轮1131’和第二驱动轮1132’的传动带的第二冷却部(图中未标出)。第一冷却部包括第一风扇610’，第一风扇610’位于马达112’的定子以及转子所在部位的下方。第二风扇620’位于第二驱动轮1132’的下方。本实施例中，为了减小砂光机10’在水平方向的长度，第二风扇620’与第一风扇610’采用上下错位的放置方式，也即第一风扇610’和第二风扇620’不在同一水平高度，优选地，第二风扇620’在高度方向上位于第一风扇610’的下方。本实施例中，第一冷却部和第二冷却部共用相同的进风口630’以及出风口640’，至少部分进风口630’位于马达112’的定子和转子的上方，至少部分出风口640’位于第二风扇620’所对应区域的壳体110’上，第二风扇620’能够将流经第一风扇610’处的气流从出风口640导出，这样气流会稳定的从进风口630’进入壳体110’内，并经马达112’运动至第一风扇610处，然后由第二风扇620’导出壳体110’外，也即，本实施例将用于冷却马达112’的第一冷却部和主要用于冷却第二驱动轮1132’的第二冷却部连通，冷却风路的路径由进风口630’进入后从马达112’的上端(远离打磨部12’的一端)进入，流经马达112’内部，从马达112’的下端(靠近打磨部12’的一端)流出，然后经过第二风扇620’的导流后，从出风口640’流出。从而实现对马达112’、第二驱动轮1132’以及传动带等的的冷却。
本实施例还提供了一种与上述实施例的锁定机构118不同锁定机构118’参见图24和图25，本实施例中的第二锁定件1182’为固定于连接轴115’外侧的突缘本体，其中突缘本体上设有止挡槽1810’，第一锁定件1181’为可轴向移动的止挡块，当止挡块轴向向上运动至第一位置时，止挡块至少部分位于止挡槽1810’内以限制连接轴115’进行周向转动，当止挡块轴向向下运动至第二位置时，止挡块与止挡槽1810’分离，连接轴115’能够自由转动。当然可以理解地，在其他实施例中，止挡块的运动方向还可以沿其他方向如径向或与轴向呈其他角度的方向，此处不再赘述。另外，同上述的实施例相同，本实施例对锁定机构118’在锁定状态和解锁状态之间的切换也是通过操作件1190’来实现的。参见图24，当操作件1190’处于闭合状态时，操作件1190’与第一锁定件1181’(止挡块)轴向抵接，第一锁定件1181’向下方压缩第一弹性元件1905’，因此第一锁定件1181’位于下方的第二位置，第一锁定件1181’与第二锁定件1182’分离，锁定机构118’处于解锁状态；当操作件1190’由闭合状态切换至打开状态时，第二锁定件1182’在第一弹性元件1905’的作用下向上运动至第一位置，止挡块与止挡槽1810’分离，锁定机构118’处于锁定状态。
图26-图27为本发明另一结构的的砂光机10”(以下简称第三个实施例)，其包括主体部11”以及打磨部12”，主体部11”包括壳体110”，位于壳体110”内的马达112”以及由马达112”驱动旋转的输出组件113”。打磨部12”包括本体120”以及位于本体120”内的输入组件121”，本体120”面向被加工表面的一侧能够安装打磨元件(如砂纸)，输入组件121”能够在输出组件113”的驱动下相对于本体120”旋转，以带动本体120”进行工作。为了实现打磨部12”与主体部11”沿马达轴向不可分离的连接，主体部11”还包括第一连接件114”，打磨部12”包括与第一连接件114”配合的第二连接件122”，其中第一连接件114”能够在马达112”的驱动下同第二连接件122”一起旋转。优选地，为了使得第一连接件114”和第二连接件122”连接可靠、稳定，优选地，第一连接件114”和第二连接件122”通过螺纹连接的方式实现连接。本实施例中，输出组件113”包括与马达112”固定连接且由马达同轴驱动旋转的输出轴1135”。第一连接件114”包括设其外周的外螺纹1140”，且第一连接件114”与输出轴1135”固定连接以同轴地驱动第一连接件114”转动。优选地，第一连接件114”与输出轴1135”一体成型。第一连接件114”包括位于其下方的用于与第二连接件122”连接 的第一配接部，优选地，第一配接部1141”设置有外螺纹1140”，第二连接件122”包括与第一配接部1141”配接的第二配接部1221”，优选地，第二配接部1221”设置为能够收容第一配接部的1141”的安装孔，安装孔的至少部分内周面设有与所述外螺纹1140”配接的内螺纹1220”。因此，本实施例中，马达112”将通过输出轴1135”将旋转运动传递给第一连接件114”，第一连接件114”通过螺纹结构带动输入组件121”相对于板状本体120”转动，从而带动板状本体120”进行打磨工作，换句话说本实施例中的第一连接件114”的外螺纹1140与安装孔的内螺纹1220”的配接既实现主体部11”与打磨部12”的轴向连接作用又能够实现主体部11”与打磨部12”之间的扭矩传递。
本实施例还提供了一种不同于上述实施例的锁定机构118”，锁定机构118”能够实现对输入组件121”的周向锁定以实现第一连接件114”相对于第二连接件122”进行转动。优选地，锁定机构118”设置于主体部11”，锁定机构181”具有锁定状态和解锁状态，当锁定机构118”处于锁定状态时，锁定机构118”对输入组件121”进行周向锁定，也即输入组件121”不能够相对壳体110”进行转动，当锁定机构118”处于解锁状态时，锁定机构118”解除对输入组件121”的周向锁定，也即输入组件121”能够相对于壳体110”进行转动。锁定机构118”包括相对于壳体110”可活动的第一锁定件1181”以及与输入组件121”固定连接或一体设置的第二锁定件1182”，优选地，第二锁定件1182”位于输入组件121”远离板状本体1202”的一端，且裸露于本体120”外以方便与第一锁定件1181”配接。优选地，第一锁定件1181”能够在沿轴向在第一位置和第二位置之间移动，参见图26，当第一锁定件1181”位于下方的第一位置时，第一锁定件1181”与第二锁定件1182”配接，也即锁定机构118”处于锁定状态，输入组件121”被周向锁定；参见图27，当第一锁定件1181”向上运动且位于上方的第二位置时，第一锁定件1181”与第二锁定件1182”分离，也即锁定机构118”处于解锁状态，锁定机构118”解除对输入组件121”的周向锁定，输入组件121”能够相对于壳体110”进行转动。本实施例，还包括用于操作锁定机构118”以使第一锁定件1181”能够在第一位置和第二位置运动的操作件1190”，操作件1190”能够在打开状态和闭合状态之间切换，参见图26当操作件1190”处于闭合状态时，操作件1190”轴向向下抵接第一锁定件1181”，第一锁定件1181”轴向向下抵压第一弹性元件1905”，因此，第一锁定件1181”位 于下方的第一位置，输入组件121”被周向锁定；参见图27，当操作件1190”处于打开状态时，第一锁定件1181”在第一弹性元件1905”作用下轴向向上运动至第二位置，锁定机构118”解除对输入组件121”的周向锁定。与上述实施例不同的是，本实施例中的操作件1190”并不能够带动第一连接件114”的运动，对于螺纹杆第一连接件114”在输入组件121”的周向锁定后的运动，本实施例主要通过外部工具1000”带动马达112”的转动来实现的。优选地，马达112”的上端设有与马达112”固定连接的1121”扁方轴段，通过外部工具带动扁方轴段转动，并进一步使得螺纹杆1140”相对于螺纹孔1220”转动。
图28-图29为本发明另一结构的砂光机20(以下简称第四个实施例)，其包括主体部21以及打磨部22，主体部21包括壳体210，位于壳体210内的马达212以及由马达212驱动旋转的输出组件213。打磨部22包括本体220以及位于本体220内的输入组件221，本体220面向被加工表面的一侧能够安装打磨元件(如砂纸)，输入组件221能够在输出组件213的驱动下相对于本体220旋转，以带动本体220进行工作。为了实现打磨部22与主体部21沿马达轴向不可分离的连接，主体部21还包括第一连接件214，打磨部22包括与第一连接件214配合的第二连接件222，其中第一连接件214能够在马达212的驱动下同第二连接件222一起旋转。优选地，为了使得第一连接件214和第二连接件222连接可靠、稳定，第一连接件214和第二连接件222通过螺纹连接的方式实现连接。本实施例中输出组件213包括与马达212固定连接且由马达212同轴驱动旋转的输出轴2135以及与输出轴2135固定连接的输出部2133。输入组件221包括与输出部2133配合的输入部2210。本实施例中输出轴2135为轴向贯通马达212的空心轴，与上述描述的第一个实施例以及第二个实施例相同，第一连接件214于靠近输入组件221的一端设置有外螺纹，且第一连接件214至少部分空心轴内。本实施例还包括用于锁定输入组件221的锁定结构，锁定机构218包括与输出轴2135固定连接的第二锁定件2182以及可轴向移动但不可转动的设置于壳体210的第一锁定件2181。与上述的描述的第一个实施例基本相同，第一锁定件2181为设置有扁方孔或其他异形孔的锁定块，第二锁定件1182为外周形状与扁方孔或其他异形孔对应的扁方轴段，该部分的原理上述第一个实施例已进行介绍，此处不再赘述。本实施例的砂光机20还包括操作件机构219，对于操作件机构219的作用以及工作原理与上述的第一个以及第二个实施例的作用和原理基本相 同，此处不再赘述。
图30-图31为本发明另一结构的砂光机30(以下简称第五个实施例)，其包括主体部31以及打磨部32，主体部31包括壳体310，位于壳体310内的马达312以及由马达312驱动旋转的输出组件313。打磨部32包括本体320以及位于本体320内的输入组件321，本体320面向被加工表面的一侧能够安装打磨元件(如砂纸)，输入组件321能够在输出组件313的驱动下相对于本体320旋转，以带动本体320进行工作。为了实现打磨部32与主体部31沿马达轴向不可分离的连接，主体部31还包括第一连接件314，输入组件321包括与第一连接件314配合的第二连接件322，其中第一连接件314能够在马达312的驱动下同第二连接件322一起旋转。但需要说明的是，本实施例中的第二连接件322并非与输入组件的其它元件固定设置，也即其并非与输入组件321内的偏心元件固定设置的，第二连接件322能够相对于偏心元件转动。也即本实施例中的可操作的连接件为第二连接件322，操作者只能从打磨部32的下方在揭开砂纸后操作第二连接件322，优选地，为了使得第一连接件314和第二连接件322连接可靠、稳定，第一连接件314和第二连接件322通过螺纹连接的方式实现连接。优选地，第一连接件314靠近输入组件321的一端设置有外螺纹3140，且第一连接件314靠近第二连接件的一端设置有内凹的螺纹孔3141，第二连接件322为与螺纹孔3141连接的螺钉3220。本实施例中输出组件313包括与马达312固定连接且由马达312同轴驱动的输出轴3135，输出轴3135与上述第一连接件314固定连接，第一连接件314通过螺钉3220将输入组件321与第一连接件314固定，从而使输出轴3135将扭矩传递至输入组件321。
本实施例中，输出组件313还可以进一步包括与输出轴3135固定连接的输出部3133，输入组件312包括与输出部3133配合作用的输入部3210。可以理解的是，当输出组件313未包括上述的输出部3133和/或输入组件321未包括上述的输入部3210，在旋紧螺钉3220时，输入组件321可能会在螺钉3220的作用下一起旋转，从而致使本体320跟着一起运动，因此，本体320可能会与从本体下方开口3203伸入用以拧螺钉3220的工具产生干涉。
另外，由于螺钉3220螺纹段的直径较小，扭矩传递时可靠性以及耐用性差，通过设置上述的输出部3133以及输入部3210，还能够保证扭矩传递的可靠性。
图32-图33为本发明另一结构的砂光机40，其包括主体部41以及打磨 部42，主体部41包括壳体410，位于壳体410内的马达412以及由马达412驱动旋转的输出组件413。打磨部42包括本体420以及位于本体420内的输入组件421，本体420面向被加工表面的一侧能够安装打磨元件(如砂纸)，输入组件421能够在输出组件413的驱动下相对于本体420旋转，以带动本体420进行工作。为了实现打磨部42与主体部41沿马达412轴向不可分离的连接，主体部41还包括第一连接件414，输入组件421包括与第一连接件414配合的第二连接件422，其中第一连接件414能够在马达412的驱动下同第二连接件422一起旋转。优选地，为了使得第一连接件414和第二连接件422连接可靠、稳定，第一连接件414和第二连接件422通过螺纹连接的方式实现连接。优选地，第一连接件414靠近第二连接件422的一端设置外螺纹4140，第二连接件422设置为安装孔，安装孔内设有与外螺纹4140配合的内螺纹4220，为本实施例中输出组件413包括与马达412固定连接且由马达412同轴驱动旋转的第一驱动轮4131、由第一驱动轮4131驱动旋转的第二驱动轮4132，以及与第二驱动轮4132固定连接且与第二驱动轮4132同轴驱动的输出轴4135，本实施例中输出轴4135与第一连接件414固定连接或一体设置以将输出扭矩传递给第一连接件414，第一连接件414进一步通过螺纹结构将扭矩传递给设置有内螺纹4220的输入组件421以带动输入组件421转动，也即与上述的第三个实施例相同，螺纹杆4140与安装孔的配接既实现主体部41与打磨部42的轴向连接作用又能够实现主体部41与打磨部42之间的扭矩传递。另外，本实施例还提供了另一种操作机构419，用于带动第一连接件414进行转动，操作机构包括操作件4190，第二弹性元件4191以及枢转轴4192，通过将操作件4190绕枢转轴4192旋转能够实现操作件4190与第一连接件414的连接或断开。图32示出了操作件4190与第一连接件414断开的状态图，图33示出了操作件4190与第一连接件414连接的状态图。
需要说明的是，本实施例中第一连接件414相对于第二连接件422的转动同样需要对应的锁定机构，本实施例的图32和图33并未示出锁定机构，对于锁定机构的设置可以参照上述其他实施例的设置方式进行设置。另外，本发明所有实施例中对第一连接件或第二连接件的锁定，还可以采用其他方式，如通过在壳体或本体上开设一个槽孔，通过外部的止挡元件的***槽孔内，从而实现对第一连接件或第二连接件的周向锁定。本发明并不局限于前述实施例中的实施方式，已经示出的不同实施例之间的结构可以相互组合， 本领域技术人员在本发明技术精髓的启示下还可能做出其他变更，但只要其实现的功能与本发明相同或相似均应涵盖于本发明的保护范围内。

Claims (25)

  1. 一种打磨工具，包括：主体部，所述主体部包括壳体、设置于所述壳体内的马达，以及由所述马达驱动旋转的输出组件；以及
    打磨部，所述打磨部可拆卸地连接至所述主体部，所述打磨部包括本体、以及相对于所述本体绕第一旋转轴线旋转的输入组件；
    其特征在于：所述主体部还包括相对所述壳体活动设置的第一连接件，所述输入组件包括第二连接件，以及相对所述第一旋转轴线偏心设置的偏心元件，所述本体与所述偏心元件相连接，所述第一连接件可操作地相对于所述第二连接件运动以使所述第一连接件和所述第二连接件配接，从而使得所述输出组件能够驱动所述输入组件绕第一旋转轴线旋转以带动所述本体运动。
  2. 如权利要求1所述的打磨工具，其特征在于：当所述第一连接件和第二连接件配接，所述打磨部沿轴向与所述主体部不可分离。
  3. 如权利要求2所述的打磨工具，其特征在于：所述打磨工具还包括锁定机构，所述锁定机构能够使所述第二连接件相对所述壳体固定。
  4. 如权利要求2所述的打磨工具，其特征在于：所述第一连接件包括第一支撑部，所述第二连接件包括用于与所述第一支撑部配接的第二支撑部，所述第一支撑部的中心轴线与所述第一旋转轴线共线设置。
  5. 如权利要求2所述的打磨工具，其特征在于：所述输出组件包括输出部，所述输入组件包括用以与所述输出部配接的输入部，当所述第一连接件和所述第二连接件配接时，所述输出部与所述输入部配接以将所述马达的旋转运动传递至所述输入组件。
  6. 如权利要求1所述的打磨工具，其特征在于：所述第一连接件上设置有第一配接部，所述第二连接件包括用于与所述第一配接部配接的第二配接部，所述第一配接部的中心轴线与所述第一旋转轴线共线设置。
  7. 如权利要求1所述的打磨工具，其特征在于：所述第一连接件上设置有设置有外螺纹，所述第二连接件设置成安装孔，所述安装孔内设置有与所述外螺纹配接的内螺纹。
  8. 如权利要求1所述的打磨工具，其特征在于：所述第一连接件的中心轴线与所述第一旋转轴线共线设置。
  9. 如权利要求1所述的的打磨工具，其特征在于：所述主体部包括相对所述壳体固定设置的弹性摆动脚，所述打磨部设置有与所述弹性摆动脚配接 的限位脚。
  10. 一种打磨工具的主体部，用于与可拆卸的打磨工具的打磨部连接，所述主体部包括：
    壳体；
    收容于所述壳体的马达，用以提供旋转动力；
    输出组件，能够在所述马达的驱动下相对于所述壳体旋转；
    其特征在于：所述主体部还包括活动的设置于所述壳体的第一连接件，所述第一连接件用于与所述打磨部配接并且能够在所述输出组件的驱动下相对所述壳体旋转。
  11. 如权利要求10所述的主体部，其特征在于：所述第一连接件包括第一配接部，所述第一配接部上设置有外螺纹。
  12. 如权利要求10所述的主体部，其特征在于：所述主体部还包括套设于所述第一连接件的空心轴，所述第一连接件可操作地相对于所述空心轴运动。
  13. 如权利要求12所述的主体部，其特征在于：所述输出组件包括输出部，所述输出部与所述空心轴固定连接连接。
  14. 如权利要求13所述的主体部，其特征在于：所述主体部还包括锁定机构，所述锁定机构具有锁定状态和解锁状态，当位于锁定状态时，所述锁定机构能够阻止所述空心轴相对所述壳体转动，当位于解锁状态时，所述空心轴能够相对于所述壳体转动。
  15. 如权利要求14所述的主体部，其特征在于：所述主体部还包括操作机构，所述操作机构包括能够控制锁定机构在锁定状态和解锁状态切换的操作件。
  16. 如权利要求15所述的主体部，其特征在于：所述操作件能够在第一位置和第二位置之间转换，位于第一位置时，所述操作件至少部分伸出所述壳体，位于第二位置时，所述操作件不超出所述壳体的外轮廓。
  17. 如权利要求10所述的主体部，其特征在于：所述输出组件包括输出部，所述输出部能够绕第三旋转轴线旋转，所述输出部包括若干个绕所述第三转轴线周向分布的棘齿。
  18. 如权利要求17所述的主体部，其特征在于：所述第三旋转轴线与所述马达的轴线平行且间隔设置。
  19. 如权利要求18所述的主体部，其特征在于：所述壳体上设置与所述 马达轴线呈一定角度延伸的握持手柄，所述马达的轴线与所述握持手柄分别位于所述第三旋转轴线相对的两侧。
  20. 一种打磨工具的打磨部，用于可拆卸地与打磨工具的主体部配接，
    所述打磨部包括：
    本体；
    至少部分收容于所述本体中的输入组件；
    其特征在于：所述输入组件能够相对所述本体绕第一旋转轴线旋转，所述输入组件包括偏心元件，所述偏心元件相对所述第一旋转轴线偏心设置，所述本体与所述偏心元件相连接，所述输入组件还包括与所述偏心元件相对固定设置的第二连接件，所述第二连接件能够与所述主体部配接。
  21. 如权利要求20所述的打磨部，其特征在于：所述本体包括套设于所述第二连接件外侧的罩体以及与所述罩体轴向固定且位于罩体下方的板状本体，所述板状本体用以安装打磨元件，所述第二连接件包括第二配接部以及与第二配接部连接的第二支撑部。
  22. 如权利要求21所述的打磨部，其特征在于：所述第二配接部设置成沿旋转轴线方向延伸的安装孔，所述第二支撑部设置成沿旋转轴线方向延伸的凹槽，所述安装孔的下端相对于所述凹槽的下端更靠近所述板状本体。
  23. 如权利要求20所述的打磨部，其特征在于：所述第二连接件包括沿第一旋转轴线方向延伸的安装孔，所述安装孔具有内螺纹。
  24. 如权利要求23所述的打磨部，其特征在于：所述第二连接件还包括沿第一旋转轴线方向延伸的凹槽，所述凹槽与所述安装孔连通，所述凹槽的外径大于所述安装孔的外径。
  25. 如权利要求20所述的打磨部，其特征在于：所述本体包括套设于所述第二连接件外侧的罩体以及与所述罩体轴向固定的板状本体，所述板状本体用以安装打磨元件，所述板状本体可设置成圆形、矩形或不规则形状。
PCT/CN2018/099070 2017-08-04 2018-08-06 打磨工具及其主体部和打磨部 WO2019024941A1 (zh)

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