WO2019105097A1 - Precise electric screwdriver - Google Patents
Precise electric screwdriver Download PDFInfo
- Publication number
- WO2019105097A1 WO2019105097A1 PCT/CN2018/104553 CN2018104553W WO2019105097A1 WO 2019105097 A1 WO2019105097 A1 WO 2019105097A1 CN 2018104553 W CN2018104553 W CN 2018104553W WO 2019105097 A1 WO2019105097 A1 WO 2019105097A1
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- WO
- WIPO (PCT)
- Prior art keywords
- housing
- electric screwdriver
- motor
- output shaft
- bearing housing
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/02—Construction of casings, bodies or handles
Definitions
- the invention relates to a screwdriver, in particular to a screwdriver for tightening and unscrewing a screw and a nut, and integrating the manual and the automatic.
- a screwdriver is a tool used to twist a screw to force it into place.
- the screwdriver is divided into a common screwdriver, a combination screwdriver, and an electric screwdriver.
- the electric screwdriver is generally a combined screwdriver.
- Electric screwdrivers as the name suggests, replace the manual installation and removal of screws with electric motors. Conventional small electric screwdrivers cannot be used manually without power. When used manually, the output shaft of the screwdriver is active and unlocked.
- a hand-in-one screwdriver is also used, which adopts a one-way valve to limit the position, and realizes the manual integration.
- the one-way valve has a large volume and a large outer diameter, so that the volume of the screwdriver product and The outer diameter is also large, which is not convenient to carry and store.
- the Chinese patent CN 201410339537.0 improves the technology of hand-integration and adopts a composite mechanism comprising an output shaft, a support frame, a bearing seat and a plurality of pins which cooperate with each other.
- the parts in the composite mechanism are relatively shaped, and the production cost is relatively large, especially the three-stage output shaft, which also leads to a longer overall length of the screwdriver; (2) the torque of the composite mechanism is small; 3) In the switching manual mode, the rotation of the output shaft has a long period of idle travel, and the user experience is not good; (4) the support frame and the housing are connected by sliding, if the two are close Contact will produce sliding friction, which will result in a loss of relatively large power. There will be noise when the screwdriver is used for a long time.
- the support frame will produce a certain sway when it is rotated, then: a, the user experience is not good, the feeling of hand tremor is serious; b, the whole batch of the screwdriver has been shaking for a long time, for the motor and the circuit
- the connection also has a relatively large hidden danger; c. Its single cylindrical outer casing also imposes high assembly requirements for the assembly of the internal mechanism; d, the noise generated by the motor can also be ignored.
- Chinese patent CN 201410339624.6 also discloses an electric screwdriver with the same composite output mechanism, and the same composite output mechanism has the above technical problems.
- the patent uses the integrated tubular casing of the original screwdriver and the motor casing to adopt the structure of the assembled casing, and is improved to adopt a mounting inner casing, which is assembled by the first one.
- the mounting shell and the second mounting shell are composed of a geared motor, a switch, a battery and a composite output mechanism.
- the structural form can achieve convenient and quick technical effects, but this also brings some problems: a. Due to the artificial addition of an inner casing, the cost will be greatly increased; b, the battery and other electrical components are connected by wires, and the wires need to be welded first and then placed in the installation.
- the object of the present invention is to solve the above technical problems and to provide an ultra-quiet precision electric screwdriver of better use and high stability.
- a precision electric screwdriver comprising a screwdriver bit and a casing, wherein the casing is provided with a motor, the screwdriver bit is located in front of the casing, and the screwdriver bit and the motor are provided for manual operation.
- a composite mechanism for automatic mode switching comprising:
- a bearing housing including a stepped inner cavity and fixed to the housing
- An output shaft interposed in the inner cavity of the bearing housing and having a distal end extending from a distal end of the bearing housing, the distal end of the output shaft having a hexagon socket for receiving the screwdriver bit,
- the proximal end of the output shaft is a step having a diameter larger than a distal end thereof, the step being matched with a stepped inner cavity of the bearing seat, the outer peripheral surface of the step being formed by a set of curved surfaces, the set of curved surfaces being spaced apart from each other The convex surface and the concave surface are connected,
- a rotating frame and a plurality of rollers disposed between the bearing housing and the output shaft the rotating frame cooperates with the roller to drive the output shaft to realize an automatic mode of the precision electric screwdriver, the roller will be
- the output shaft and the bearing housing are fixed to each other to realize the manual mode of the precision electric screwdriver.
- the rotating frame comprises a back plate and a plurality of extending arms extending vertically
- the backing plate is provided with a linking shaft hole that is opposite to the shaft of the motor, so that the rotating frame and the motor are arranged
- the shaft is coupled
- the extension arm extends between the proximal end of the output shaft and the bearing housing
- the inner diameter of the extension arm is equivalent to the outer diameter of the outer convex surface
- the roller is axially disposed on the rotation
- the diameter of the roller is larger than the outer convex surface The distance between the bearing seats and the maximum distance between the inner concave surface and the bearing housing.
- the roller in the automatic mode, the roller generates an oblique force in a rotational direction to the output shaft.
- the diameter of the roller is equal to the maximum distance between the concave surface and the bearing housing.
- a bracket is fixed in the housing, the motor is fixed inside the bracket, the composite output mechanism is located at a distal end of the bracket, and a battery is disposed at a proximal end of the bracket, and the bracket is also fixed There is a circuit board electrically connected to the positive and negative poles of the battery.
- the bracket comprises an annular body and two supporting pieces which are symmetric with each other and extend proximally along the axis of the bracket; the outer circumference of the annular body is provided with a protrusion for being inside the housing The grooves are matched to each other so that the two are radially fixed to each other; the distal end faces of the annular bodies cooperate with the projections in the housing to axially fix the two.
- the proximal end of the annular body of the bracket is further provided with an inward convex wall, and a wedge block disposed on the support piece cooperates to fix the motor axially inside the bracket.
- the flat surface of the motor cooperates with the inner surface of the leg to radially fix the motor to the bracket.
- the circuit board is fixed to the bracket by screws, and a first end thereof is located at a proximal end of the motor; and a second end of the circuit board includes positive and negative pole contacts of the battery, wherein a positive pole
- the contacts are in direct contact with the battery through the bayonet of the proximal end of the tab, and the negative contact is electrically coupled to the conductive barrel and/or the conductive spring at the proximal end of the battery.
- the housing is provided with two through holes, and two switch buttons respectively pass through the through holes to press the switch contacts of the circuit board, and the two ends of the switch buttons are respectively provided with barbs And for preventing the switch button from falling out of the through hole.
- an anti-friction pad is further disposed between the rotating frame and the bracket, and the anti-friction pad is sleeved outside the motor shaft of the motor.
- the bearing housing is fixed to the bracket by a shoulder.
- the housing is a cylindrical structure having a receiving space formed by the first housing and the second housing being fixed together by a snap mechanism.
- the bearing housing is fixed to the housing by a shoulder.
- an anti-friction pad is further disposed between the bearing seat and the housing, and the anti-friction pad is sleeved outside the motor shaft of the motor.
- the housing is further provided with a battery and a circuit board provided with a switch, the housing is provided with a switch button for controlling the switch, and a non-slip sleeve sleeved outside the housing; the shell
- the front end of the body is respectively provided with a front locking sleeve and a rear locking sleeve; the rear locking sleeve is disposed between the tail cover and the housing, the tail cover is screwed with the housing, and the front locking sleeve is inside LED light pipe and lampshade are provided.
- a sealing ring is disposed between the bearing housing and the output shaft for forming a closed space between the bearing housing and the proximal end of the output shaft.
- the distal end of the output shaft is flush with the distal end of the bearing housing.
- the distal end of the output shaft has a hexagon socket for receiving the screwdriver bit and has a magnet inside.
- the roller of the present invention generates an oblique thrust in the direction of rotation of the output shaft, so that the torque of the precision electric screwdriver of the present invention is increased;
- the output shaft of the present invention does not substantially generate a rotating idle stroke, and the user experience is good;
- the bracket is set, the electrical components in the housing can be installed and positioned on the mechanism first, and then the welding electrical connection is realized, so that the electrical connection is more reliable and simple, and there is no hidden danger of leakage and power failure;
- bracket setting can also be used directly as a welding fixture, no need to set aside;
- the distal end of the output shaft is flush with the distal end of the bearing housing, so that the mating length of the two is greatly increased, the stability of the transmission is improved, and the hand tremor feeling brought by the prior art is reduced, and the drop is achieved.
- the setting of the friction reducing pad can reduce the friction between the rotating frame and the housing, improve the driving efficiency and reduce the energy consumption
- the sealing ring on the outer side of the output shaft can form a closed space between the bearing seat and the proximal end of the output shaft, and the lubricating oil placed in the space can greatly increase the mute effect of the entire screwdriver.
- Figure 1 is a schematic exploded view of a preferred embodiment of the present invention
- Figure 2 is a front elevational view of a preferred embodiment of the present invention.
- Figure 3 is an enlarged view of a portion A of Figure 2;
- Figure 4 is an enlarged view of a portion B of Figure 1;
- Figure 5 is a cross-sectional view taken along line C-C of Figure 2;
- Figure 6 is a force diagram of a roller in an automatic mode in accordance with a preferred embodiment of the present invention.
- Figure 7 is a force diagram of a prior art roller in an automatic mode
- Figure 8 is a schematic exploded view of a second embodiment of the present invention.
- Figure 9 is a front elevational view of a second embodiment of the present invention.
- Figure 10 is an enlarged view of a portion D in Figure 9;
- Figure 11 is a schematic view showing the structure of a stent according to a second embodiment of the present invention.
- the present invention discloses a precision electric screwdriver, such as the preferred embodiment shown in Figures 1-5, including a screwdriver bit and housing 1.
- the screwdriver bit is located at a distal end of the housing 1.
- the "distal end” and “proximal end” are definitions for the user. The end farther from the user is the “distal end", and the end closer to the user is the “near end”.
- the housing 1 is a cylindrical structure having a receiving space formed by the first housing 101 and the second housing 102 fixed together by the locking mechanism 103, which is simple and convenient, and has higher reliability. .
- further ultrasonic welding, or other means of attachment that can be conceived by those skilled in the art, are possible.
- the housing 1 of the housing 1 is provided with a motor 2, a battery 7 and a circuit board 8 provided with a switch.
- the housing is provided with a switch button 9 for controlling the switch, and the circuit board 8 is provided by the switch button. 9 Start and drive the motor 7 forward or reverse.
- An anti-slip sleeve 10 is optionally sleeved on the outside of the housing for ergonomic design.
- the screwdriver bit is located in front of the casing 1, and a composite mechanism for realizing manual and automatic mode switching is disposed between the screwdriver bit and the motor 2.
- the composite mechanism includes:
- the bearing housing 3 including the stepped inner cavity, is fixed to the housing 1 by a shoulder 31 as shown in FIG. 3;
- An output shaft 4 is inserted through the inner cavity of the bearing housing 3 and has a distal end 41 extending from a distal end of the bearing housing 3, and a distal end 41 of the output shaft 4 has a receiving portion for receiving the screwdriver bit
- the inner end of the output shaft 4 is a step having a diameter larger than the distal end 41 thereof. The step is matched with the stepped inner cavity of the bearing housing 3 to prevent the output shaft 4 from being detached from the housing 1. Fall out axially;
- the rotating frame 5 includes a backing plate 52 and a plurality of extending arms 51 extending vertically, and the backing plate 52 is provided with a linkage shaft hole that is opposite to the crankshaft of the motor 2, and the motor 2 After the crankshaft is inserted into the linkage shaft hole, the rotating frame 5 can be driven to rotate together.
- the automatic and manual mode switching of the present invention is similar to the prior art, in which the rotating frame 5 cooperates with the roller 50 to drive the output shaft 4 to realize an automatic mode of the precision electric screwdriver, the roller 50 will output the output
- the shaft 4 and the bearing housing 3 are fixed to each other to realize the manual mode of the precision electric screwdriver.
- the present invention is characterized in that the outer peripheral surface of the step of the output shaft 4 is formed by a set of curved surfaces which are connected by mutually overlapping outer convex surfaces 43 and concave surfaces 44.
- An extension arm 51 of the rotating frame extends between the proximal end 42 of the output shaft and the bearing housing 3.
- the inner diameter of the extension arm 51 is equivalent to the outer diameter of the outer convex surface 43.
- the roller 50 is axially Between the back plate 52 of the rotating frame and the stepped inner cavity of the bearing housing 3, circumferentially disposed between the inner concave surface 44 and the bearing housing 3, and located between adjacent extending arms 51, The diameter of the roller 50 is larger than the distance between the outer convex surface 43 and the bearing housing 3 and is equivalent to the maximum distance between the inner concave surface 44 and the bearing housing 3.
- the roller 50 in the automatic mode, the roller 50 generates an oblique force D1 in the rotational direction of the output shaft 4.
- the roller 50 produces a vertical centripetal force D2 to the output shaft 4.
- F The driving force of the motor to the roller in the automatic mode
- N the reaction force of the bearing seat against the roller
- D1 the reaction force of the concave shaft facing the roller in the output shaft
- D2 the reaction of the output shaft plane of the prior art to the roller Force
- a1 the angle between the bearing seat and the reaction force of the roller and the axis
- b the angle between the reaction force of the output shaft arc facing the roller and the axis (visible in the figure)
- b1 the bearing seat to the roller
- the driving force D1>D2
- driving force arm L1>L2
- available from above M1>M2 which increases the torque of the precision electric screwdriver of the present invention, and the driving efficiency is greater than that of the prior art electric screwdriver.
- the diameter of the roller 50 can be selected to be substantially equal to the maximum distance between the concave surface 44 and the bearing housing 3.
- the output shaft does not substantially generate a rotational idle motion, and the user experience is good.
- the first is the automatic mode operation principle.
- the control switch button 9 drives the motor 2 to work, the shaft of the motor drives the rotating frame 5 to rotate, and the extension of the support frame 5
- the arm 51 drives the roller 50.
- the roller 50 is engaged with the concave surface 44 of the output shaft and drives the output shaft 4 to rotate.
- the extension arm 51 generates the force in FIG. 6 on the roller 50, and the force passes through the roller. 50 acts on the output shaft 4, and the output shaft 4 finally drives the screwdriver bit to rotate.
- an anti-friction pad 91 is further disposed between the bearing housing 3 and the housing 1, and the anti-friction pad 91 is sleeved outside the motor shaft of the motor 2, which can be reduced.
- the friction between the rotating frame and the housing improves driving efficiency and reduces energy consumption.
- the two-stage output shaft 4 is more convenient to manufacture, and the overall length of the precision electric screwdriver of the present invention can be shortened, the cost is reduced, and the connection mechanism with the bearing housing 3 is not required.
- the front end of the housing 1 is respectively provided with a front locking sleeve 11 and a rear locking sleeve 12.
- the rear locking sleeve 12 is disposed between the tail cover 13 and the housing 1 , and the tail cover 13 is screwed to the housing 1 .
- the front locking sleeve 11 is provided with an LED light tube 14 and a lamp cover 15 .
- the battery in the present invention may be a dry battery or a rechargeable battery.
- the housing 1 includes a charging circuit, and the tail cover 13 may be directly welded and integrated with the housing 1.
- FIG. 8 to 11 disclose a second embodiment of the present invention, which, like the prior art, includes a screwdriver bit and a housing 1 in the shape of a circular tube.
- the housing 1 is provided with a motor 2, the screwdriver
- a composite output mechanism for manual and automatic mode switching is provided between the head and the motor 2.
- a bracket 300 is fixed in the housing 1 , and the bracket may be made of metal or plastic.
- the specific structure is as shown in FIG. 11 , and the bracket 300 includes a ring body 3001 and Two struts 3002 symmetrical to each other and extending proximally along the axis of the bracket 300; the outer circumference of the annular body 3001 is provided with a protrusion 3003 for matching the groove 16 in the housing 1
- the tight fits are such that the two are radially fixed to each other; the distal end face 3004 of the annular body 3001 cooperates with the projections in the housing 1 to axially fix the two.
- the proximal end of the annular body 3001 of the bracket 300 is further provided with an inward convex wall 3005 (shown in FIG. 10), and the supporting piece 3002 is provided with a wedge block 3006, which cooperate with each other to the motor 2
- the motor shaft of the motor 2 is directed to the distal end and protrudes from a circular hole formed by the convex wall 3005.
- the motor 2 has a flat surface 21 that cooperates with the inner surface of the support piece 3002 to radially fix the motor to the bracket 300.
- the motor 2 can be placed between the convex wall 3005 of the bracket 300 and the wedge block 3006. Because of the radially extending structure of the support piece 3002, it has a certain elasticity and is suitable for mounting a motor.
- the support piece 3002 simply changes its shape to fit the motor.
- the composite output mechanism is located at the distal end of the bracket 300.
- the proximal end of the bracket 300 is provided with a battery 7.
- the circuit board 8 is also fixed in the bracket 300.
- the circuit board 8 can be a flexible circuit board or It is an ordinary printed circuit board.
- the circuit board 8 is electrically connected to the positive and negative poles of the battery 7.
- the battery 7 may be a common battery such as a dry battery 7 or an integrally charged lithium battery 7, a nickel hydrogen battery 7.
- the circuit board 8 is fixed to the bracket 300 by screws 22, and one end is located at the proximal end of the motor 2.
- One end of the circuit board 8 includes positive and negative two-pole contacts of the battery 7, wherein the positive contact contacts the battery 7 through the bayonet 3007 of the proximal end of the support 3002, and the negative contact is located at the
- the conductive tube 39 at the proximal end of the battery 7 and the conductive spring 38 are electrically connected.
- the conductive spring 38 is pressed by the tail cap 13.
- the other end of the circuit board 8 includes a metal piece conductor 85 extending distally and electrically connected to an LED lamp board 14, the LED light board 14 being snapped by the LED lamp cover 15 The distal end of the housing 1.
- the housing 1 is provided with two through holes 17 through which two switch buttons 9 are respectively pressed against the switch contacts 81 of the circuit board 8, and the two ends of the switch button 9 are respectively A barb 94 is provided for preventing the switch button 9 from falling out of the through hole 17.
- the switch button 9 is mounted on the housing 1 and the assembly fault tolerance is relatively high.
- the composite output mechanism of the present invention includes: a bearing housing 3, an output shaft 4, and a rotating frame 5 and a plurality of rollers disposed between the bearing housing 3 and the output shaft 4 50.
- the bearing housing 3 includes a stepped inner cavity and is fixed to the bracket 300.
- the bearing housing 3 is fixed to the bracket 300 by a shoulder 31.
- the output shaft 4 is inserted into the inner cavity of the bearing housing 3 and the distal end thereof is flush with the distal end of the bearing housing 3, so that the mating length of the two is greatly increased, and the stability of the transmission is improved.
- the hand-feeling sensation brought by the small prior art achieves the purpose of noise reduction.
- the distal end of the output shaft 4 has a hexagon socket for receiving the screwdriver bit and has a magnet 93 inside thereof, and the proximal end of the output shaft 4 is a step having a diameter larger than a distal end thereof, the step and the step
- the stepped inner cavity of the bearing housing 3 is matched, and the outer peripheral surface of the step is formed by a set of curved surfaces formed by connecting mutually convex outer and inner concave surfaces, and the rotating frame 5 is matched with the roller 50.
- the rotating frame 5 includes a backing plate 14 and a plurality of vertically extending plurality of extending arms 81.
- the backing plate 14 is provided with a linkage shaft hole that is opposite to the shaft of the motor 2, so that the rotation
- the frame 5 is coupled to the crankshaft of the motor, and the extension arm 81 extends between the proximal end of the output shaft and the bearing housing 3.
- the roller 50 is axially disposed on the back plate 14 and the bearing housing 3.
- the stepped inner chambers are circumferentially disposed between the output shaft 4 and the bearing housing 3 and between the adjacent extension arms 81.
- the automatic and manual mode switching of the present invention is similar to the prior art, in which the rotating frame 5 cooperates with the roller 50 to drive the output shaft 4 to realize an automatic mode of the precision electric screwdriver, the roller 50 will output the output
- the shaft 4 and the bearing housing 3 are fixed to each other to realize the manual mode of the precision electric screwdriver.
- the outer peripheral surface of the step of the output shaft 4 is formed by a set of curved surfaces which are connected by mutually convex outer and inner concave surfaces.
- the roller 50 generates an oblique force in the rotational direction of the output shaft 4, so that the torque in the automatic mode of the present invention is increased, and the driving efficiency is greater than that of the prior art electric screwdriver.
- the diameter of the roller 50 can be selected to be substantially equal to the maximum distance between the concave surface and the bearing housing 3, so that in the manual mode of the present invention, the output shaft does not substantially generate a rotating idle stroke, and the user experience is good.
- the switching of the manual and automatic modes of the present invention is substantially similar to the prior art and will not be described again.
- an anti-friction pad 91 is disposed between the rotating frame 5 and the bracket 300, and the anti-friction pad 91 is sleeved outside the motor shaft of the motor 2. This can reduce the friction between the bracket and the housing, improve driving efficiency and reduce energy consumption.
- the cylindrical outer shape structure of the output shaft 4 of the present invention is more compact and lower in cost.
- a sealing ring 92 is disposed between the bearing housing 3 and the output shaft 4, so that the bearing housing 3 and the proximal end of the output shaft 4 can form a closed space, and lubricating oil can be placed in the space, so that the friction reducing pad can be used.
- the effect of 91 is greatly enhanced, and the mute effect of the entire screwdriver is greatly increased.
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Abstract
A precise electric screwdriver, comprising a screwdriver bit and a housing (1). A motor (2) is provided in the housing (1); the screwdriver bit is positioned in front of the housing (1); a composite mechanism for implementing switching between manual and automatic modes is provided between the screwdriver bit and the motor (2); the proximal end (42) of an output shaft (4) of the composite mechanism is a step having a larger diameter than the distal end (41); the peripheral surface of the step is formed by a group of curved surfaces; the group of curved surfaces are formed by connecting outer convex surfaces (43) and inner concave surfaces (44) spaced from each other.
Description
本发明涉及一种螺丝批,尤其涉及一种用于拧紧和旋松螺丝、螺帽且集手动与自动于一体的螺丝批。The invention relates to a screwdriver, in particular to a screwdriver for tightening and unscrewing a screw and a nut, and integrating the manual and the automatic.
螺丝批是一种用来拧转螺丝钉以迫使其就位的工具,通常螺丝批分为普通螺丝批、组合型螺丝批和电动螺丝批,而电动螺丝批一般都是组合型螺丝批。电动螺丝批,顾名思义就是以电动马达代替人手安装和移除螺丝,而常规小电动螺丝批在没有电的情况下,一般无法进行手动使用,手动使用时,螺丝批输出轴是处于活动非锁定。A screwdriver is a tool used to twist a screw to force it into place. Usually, the screwdriver is divided into a common screwdriver, a combination screwdriver, and an electric screwdriver. The electric screwdriver is generally a combined screwdriver. Electric screwdrivers, as the name suggests, replace the manual installation and removal of screws with electric motors. Conventional small electric screwdrivers cannot be used manually without power. When used manually, the output shaft of the screwdriver is active and unlocked.
现有技术中,也涉及一种手自一体的螺丝批,采用单向阀进行限位,实现手自一体的,单向阀的体积大,外径也较大,使得螺丝批产品的体积及外径也较大,不方便携带及存储。中国专利CN 201410339537.0改进了手自一体的技术,采用了一种复合机构,该复合机构包括相互配合的输出轴、支撑架、轴承座和复数个销。但是:(1)该复合机构中各个零件相对异形,生产成本较大,尤其是三段式的输出轴,也导致螺丝批的整体长度较长;(2)该复合机构的扭矩较小;(3)该复合机构在切换手动模式中,输出轴的旋转会有较长一段的空行程,用户体验不佳;(4)支撑架与所述壳体之间由于是滑动连接,两者若紧密接触则会产生滑动摩擦,会损失比较大的功率,螺丝批使用时间长了还会有杂音。但是如果两者不接触,则支撑架在转动的时候会产生一定的晃动,则:a、用户体验不好,手颤的感觉严重;b、螺丝批整体晃动时间久了,对于电机及电路的连接也是具有比较大的隐患;c、其单一的圆筒形外壳对于内部机构的组装也是提出了很高的装配要求;d、电机产生的噪音也同样不容忽视。In the prior art, a hand-in-one screwdriver is also used, which adopts a one-way valve to limit the position, and realizes the manual integration. The one-way valve has a large volume and a large outer diameter, so that the volume of the screwdriver product and The outer diameter is also large, which is not convenient to carry and store. The Chinese patent CN 201410339537.0 improves the technology of hand-integration and adopts a composite mechanism comprising an output shaft, a support frame, a bearing seat and a plurality of pins which cooperate with each other. However: (1) the parts in the composite mechanism are relatively shaped, and the production cost is relatively large, especially the three-stage output shaft, which also leads to a longer overall length of the screwdriver; (2) the torque of the composite mechanism is small; 3) In the switching manual mode, the rotation of the output shaft has a long period of idle travel, and the user experience is not good; (4) the support frame and the housing are connected by sliding, if the two are close Contact will produce sliding friction, which will result in a loss of relatively large power. There will be noise when the screwdriver is used for a long time. However, if the two do not touch, the support frame will produce a certain sway when it is rotated, then: a, the user experience is not good, the feeling of hand tremor is serious; b, the whole batch of the screwdriver has been shaking for a long time, for the motor and the circuit The connection also has a relatively large hidden danger; c. Its single cylindrical outer casing also imposes high assembly requirements for the assembly of the internal mechanism; d, the noise generated by the motor can also be ignored.
中国专利CN 201410339624.6也揭示了一款采用同样复合输出机构的电动螺丝批,同样复合输出机构具有上述的技术问题。不同的是,该专利将原先螺丝批的电池舱壳采用一体式的管状壳体结合电机壳采用拼装壳体的结构,改进为采用一个安装内壳,该安装内壳由相互拼合的第一安装壳和第二安装壳组成,所述安装内壳内设有减速电机、开关、电池及复合输出机构,这样的结构形式 可以达到组装方便快捷的技术效果,但是这也会带来一些问题:a、由于人为的增加一个安装内壳,导致其成本会大大增加;b、电池与其他用电元件之间采用导线连接,在装配时需要先将导线焊接好,然后再置于所述安装内壳中,这样会产生一个问题,即装配时导线排布费时费力,很多情况下会产生压线导致装配不顺的问题,或者产生装配工人用力不慎会将导线与电池触点或者用电元件上的焊接点拉断的装配事故。这种情况在装配中是不允许的,其会导致产品不良率大大增加。Chinese patent CN 201410339624.6 also discloses an electric screwdriver with the same composite output mechanism, and the same composite output mechanism has the above technical problems. The difference is that the patent uses the integrated tubular casing of the original screwdriver and the motor casing to adopt the structure of the assembled casing, and is improved to adopt a mounting inner casing, which is assembled by the first one. The mounting shell and the second mounting shell are composed of a geared motor, a switch, a battery and a composite output mechanism. The structural form can achieve convenient and quick technical effects, but this also brings some problems: a. Due to the artificial addition of an inner casing, the cost will be greatly increased; b, the battery and other electrical components are connected by wires, and the wires need to be welded first and then placed in the installation. In the case, there is a problem that the wire arrangement is time-consuming and labor-intensive during assembly, and in many cases, the pressure line may cause the assembly to be unsatisfactory, or the assembly worker may inadvertently contact the wire with the battery or the electrical component. The assembly accident of the broken solder joint. This situation is not allowed in the assembly, which will lead to a significant increase in product defect rate.
发明内容Summary of the invention
本发明的目的在于解决上述技术问题,提供一种使用效果更佳、高稳定性的超静音精密电动螺丝批。The object of the present invention is to solve the above technical problems and to provide an ultra-quiet precision electric screwdriver of better use and high stability.
本发明是通过以下技术方案实现的:The invention is achieved by the following technical solutions:
一种精密电动螺丝批,包括螺丝批头和壳体,所述壳体内设有电机,所述螺丝批头位于所述壳体的前方,所述螺丝批头与电机之间设有用于实现手动及自动模式切换的复合机构,所述复合机构包括:A precision electric screwdriver, comprising a screwdriver bit and a casing, wherein the casing is provided with a motor, the screwdriver bit is located in front of the casing, and the screwdriver bit and the motor are provided for manual operation. And a composite mechanism for automatic mode switching, the composite mechanism comprising:
轴承座,包括一阶梯式内腔,且固定在所述壳体上,a bearing housing including a stepped inner cavity and fixed to the housing
输出轴,穿插设于所述轴承座的内腔且其远端从所述轴承座的远端伸出,所述输出轴的远端具有用于接收所述螺丝批头的内六角,所述输出轴的近端为直径大于其远端的台阶,所述台阶与所述轴承座的阶梯式内腔相匹配,所述台阶的外周面由一组曲面形成,所述一组曲面由相互间隔的外凸面和内凹面连接而成,An output shaft interposed in the inner cavity of the bearing housing and having a distal end extending from a distal end of the bearing housing, the distal end of the output shaft having a hexagon socket for receiving the screwdriver bit, The proximal end of the output shaft is a step having a diameter larger than a distal end thereof, the step being matched with a stepped inner cavity of the bearing seat, the outer peripheral surface of the step being formed by a set of curved surfaces, the set of curved surfaces being spaced apart from each other The convex surface and the concave surface are connected,
以及置于所述轴承座和输出轴之间的旋转架和复数个滚柱,所述旋转架配合滚柱驱动所述输出轴实现所述精密电动螺丝批的自动模式,所述滚柱将所述输出轴与轴承座相互固定实现所述精密电动螺丝批的手动模式。And a rotating frame and a plurality of rollers disposed between the bearing housing and the output shaft, the rotating frame cooperates with the roller to drive the output shaft to realize an automatic mode of the precision electric screwdriver, the roller will be The output shaft and the bearing housing are fixed to each other to realize the manual mode of the precision electric screwdriver.
优选的,所述旋转架包括背板和垂直延伸的复数个延伸臂,所述背板上设有与所述电机的机轴相对接的联动轴孔,以使所述旋转架与电机的机轴相联动,所述延伸臂伸入所述输出轴的近端与轴承座之间,所述延伸臂的内径与所述外凸面的外径相当,所述滚柱轴向设置于所述旋转架的背板与轴承座的阶梯式内腔之间,周向设置于所述内凹面与轴承座之间,且位于相邻延伸臂之间,所述滚柱的直径大于所述外凸面与轴承座之间的距离且与所述内凹面与轴承座之间 的最大距离相当。Preferably, the rotating frame comprises a back plate and a plurality of extending arms extending vertically, and the backing plate is provided with a linking shaft hole that is opposite to the shaft of the motor, so that the rotating frame and the motor are arranged The shaft is coupled, the extension arm extends between the proximal end of the output shaft and the bearing housing, the inner diameter of the extension arm is equivalent to the outer diameter of the outer convex surface, and the roller is axially disposed on the rotation Between the back plate of the frame and the stepped inner cavity of the bearing housing, circumferentially disposed between the inner concave surface and the bearing seat, and between the adjacent extending arms, the diameter of the roller is larger than the outer convex surface The distance between the bearing seats and the maximum distance between the inner concave surface and the bearing housing.
优选的,自动模式下,所述滚柱对所述输出轴产生转动方向的斜向力。Preferably, in the automatic mode, the roller generates an oblique force in a rotational direction to the output shaft.
优选的,所述滚柱的直径等于所述内凹面与轴承座之间的最大距离。Preferably, the diameter of the roller is equal to the maximum distance between the concave surface and the bearing housing.
优选的,所述壳体内固定有一支架,所述电机固定在所述支架内部,所述复合输出机构位于所述支架的远端,所述支架的近端设置有电池,所述支架内还固定有电路板,所述电路板与所述电池的正负两极电性连接。Preferably, a bracket is fixed in the housing, the motor is fixed inside the bracket, the composite output mechanism is located at a distal end of the bracket, and a battery is disposed at a proximal end of the bracket, and the bracket is also fixed There is a circuit board electrically connected to the positive and negative poles of the battery.
优选的,所述支架包括一圆环体和相互对称且沿所述支架轴线向近端延伸的两个支片;所述圆环体的外周上设置有凸起,用于与所述壳体内的凹槽相匹配紧配合,以使两者相互径向固定;所述圆环体的远端端面与所述壳体内的凸起相配合,以使两者相互轴向固定。Preferably, the bracket comprises an annular body and two supporting pieces which are symmetric with each other and extend proximally along the axis of the bracket; the outer circumference of the annular body is provided with a protrusion for being inside the housing The grooves are matched to each other so that the two are radially fixed to each other; the distal end faces of the annular bodies cooperate with the projections in the housing to axially fix the two.
优选的,所述支架的圆环体的近端还设置有向内的凸壁,与设置在所述支片上的楔形块,一起相互配合来将所述电机轴向固定于所述支架内部,所述电机的扁平表面与所述支片的内表面相互配合使所述电机与所述支架径向固定。Preferably, the proximal end of the annular body of the bracket is further provided with an inward convex wall, and a wedge block disposed on the support piece cooperates to fix the motor axially inside the bracket. The flat surface of the motor cooperates with the inner surface of the leg to radially fix the motor to the bracket.
优选的,所述电路板通过螺钉固定于所述支架上,且其第一端位于所述电机的近端;所述电路板的第二端包括所述电池的正负两极触点,其中正极触点穿过所述支片的近端的卡口直接与电池接触,负极触点与位于所述电池近端的导电筒和\或导电弹簧电性连接。Preferably, the circuit board is fixed to the bracket by screws, and a first end thereof is located at a proximal end of the motor; and a second end of the circuit board includes positive and negative pole contacts of the battery, wherein a positive pole The contacts are in direct contact with the battery through the bayonet of the proximal end of the tab, and the negative contact is electrically coupled to the conductive barrel and/or the conductive spring at the proximal end of the battery.
优选的,所述壳体上设置有两个通孔,分别有两个开关按键穿过所述通孔按压于所述电路板的开关触点,所述开关按键的两端分别设有倒刺,用于防止所述开关按键从所述通孔掉出。Preferably, the housing is provided with two through holes, and two switch buttons respectively pass through the through holes to press the switch contacts of the circuit board, and the two ends of the switch buttons are respectively provided with barbs And for preventing the switch button from falling out of the through hole.
优选的,所述旋转架与所述支架之间还设置有减摩垫,所述减摩垫套在所述电机的电机轴外。Preferably, an anti-friction pad is further disposed between the rotating frame and the bracket, and the anti-friction pad is sleeved outside the motor shaft of the motor.
优选的,所述轴承座通过凸肩固定于所述支架上。Preferably, the bearing housing is fixed to the bracket by a shoulder.
另一方案中,所述壳体为由第一壳体和第二壳体通过卡扣机构固定在一起形成的具有收容空间的圆筒状结构。In another aspect, the housing is a cylindrical structure having a receiving space formed by the first housing and the second housing being fixed together by a snap mechanism.
优选的,所述轴承座通过凸肩固定于所述壳体上。Preferably, the bearing housing is fixed to the housing by a shoulder.
优选的,所述轴承座与所述壳体之间还设置有减摩垫,所述减摩垫套在所述电机的电机轴外。Preferably, an anti-friction pad is further disposed between the bearing seat and the housing, and the anti-friction pad is sleeved outside the motor shaft of the motor.
优选的,所述壳体内还设有电池和设有开关的电路板,所述壳体上设有用 于控制所述开关的开关按键,以及套设在所述壳体外的防滑套;所述壳体的两端分别设置有前锁紧套和后锁紧套;所述后锁紧套设置在尾盖与壳体之间,所述尾盖与壳体螺纹连接,所述前锁紧套内设有LED光管及灯罩。Preferably, the housing is further provided with a battery and a circuit board provided with a switch, the housing is provided with a switch button for controlling the switch, and a non-slip sleeve sleeved outside the housing; the shell The front end of the body is respectively provided with a front locking sleeve and a rear locking sleeve; the rear locking sleeve is disposed between the tail cover and the housing, the tail cover is screwed with the housing, and the front locking sleeve is inside LED light pipe and lampshade are provided.
优选的,所述轴承座与所述输出轴之间设置有密封圈,用于将所述轴承座与输出轴的近端形成封闭空间。Preferably, a sealing ring is disposed between the bearing housing and the output shaft for forming a closed space between the bearing housing and the proximal end of the output shaft.
优选的,所述输出轴的远端与所述轴承座的远端平齐。Preferably, the distal end of the output shaft is flush with the distal end of the bearing housing.
优选的,所述输出轴的远端具有用于接收所述螺丝批头的内六角且其内部具有磁铁。Preferably, the distal end of the output shaft has a hexagon socket for receiving the screwdriver bit and has a magnet inside.
本发明的有益效果主要体现在:The beneficial effects of the present invention are mainly embodied in:
1、自动模式下,本发明的滚柱对输出轴产生其转动方向的斜向推力,使本发明的精密电动螺丝批扭矩增大;1. In the automatic mode, the roller of the present invention generates an oblique thrust in the direction of rotation of the output shaft, so that the torque of the precision electric screwdriver of the present invention is increased;
2、手动模式下,本发明的输出轴基本不会产生旋转的空行程,用户体验良好;2. In the manual mode, the output shaft of the present invention does not substantially generate a rotating idle stroke, and the user experience is good;
3、取消了输出轴的异形结构,使制造更方便,也使本发明的精密电动螺丝批的整体长度可以缩短,降低成本;3. The special-shaped structure of the output shaft is eliminated, which makes the manufacturing more convenient, and the overall length of the precision electric screwdriver of the invention can be shortened and the cost is reduced;
4、支架的设置,可以将壳体内的电气元件先都安装定位于此机构上,然后实现焊接电连接,这样电性连接更为可靠简单,不会产生漏电断电的隐患;4, the bracket is set, the electrical components in the housing can be installed and positioned on the mechanism first, and then the welding electrical connection is realized, so that the electrical connection is more reliable and simple, and there is no hidden danger of leakage and power failure;
5、支架的设置,也可以直接作为焊接的治具,不需要另设;5, the bracket setting, can also be used directly as a welding fixture, no need to set aside;
6、输出轴的远端与所述轴承座的远端平齐,导致两者的配合长度大大增加,提高了传动的稳定性,减小现有技术所带来的手颤感觉,达到了降噪的目的;6. The distal end of the output shaft is flush with the distal end of the bearing housing, so that the mating length of the two is greatly increased, the stability of the transmission is improved, and the hand tremor feeling brought by the prior art is reduced, and the drop is achieved. The purpose of noise;
7、输出轴的圆柱形外形结构,结构更为紧凑,成本更加低;7. The cylindrical shape structure of the output shaft is more compact and the cost is lower;
8、减摩垫的设置,可以降低旋转架与壳体间的摩擦力,提高驱动效率、降低能耗;8. The setting of the friction reducing pad can reduce the friction between the rotating frame and the housing, improve the driving efficiency and reduce the energy consumption;
9、输出轴外侧的密封圈设置,可以将轴承座与输出轴的近端形成封闭空间,置于该空间内的润滑油可以使整个螺丝批的静音效果大大增加。9. The sealing ring on the outer side of the output shaft can form a closed space between the bearing seat and the proximal end of the output shaft, and the lubricating oil placed in the space can greatly increase the mute effect of the entire screwdriver.
图1是本发明优选实施例的***示意图;Figure 1 is a schematic exploded view of a preferred embodiment of the present invention;
图2是本发明优选实施例的主视图;Figure 2 is a front elevational view of a preferred embodiment of the present invention;
图3是图2中A部分的放大图;Figure 3 is an enlarged view of a portion A of Figure 2;
图4是图1中B部分的放大图;Figure 4 is an enlarged view of a portion B of Figure 1;
图5是图2中沿C-C的剖视图;Figure 5 is a cross-sectional view taken along line C-C of Figure 2;
图6是本发明优选实施例在自动模式下的滚柱的施力图;Figure 6 is a force diagram of a roller in an automatic mode in accordance with a preferred embodiment of the present invention;
图7是现有技术在自动模式下的滚柱的施力图;Figure 7 is a force diagram of a prior art roller in an automatic mode;
图8是本发明第二实施例的***示意图;Figure 8 is a schematic exploded view of a second embodiment of the present invention;
图9是本发明第二实施例的主视图;Figure 9 is a front elevational view of a second embodiment of the present invention;
图10是图9中D部分的放大图;Figure 10 is an enlarged view of a portion D in Figure 9;
图11是本发明第二实施例的支架的结构示意图。Figure 11 is a schematic view showing the structure of a stent according to a second embodiment of the present invention.
为使本发明的上述目的、特征和有益效果能够更为明显易懂,下面结合附图对本发明的具体实施例做详细的说明。The above described objects, features, and advantages of the present invention will become more apparent from the detailed description of the embodiments.
本发明揭示了一种精密电动螺丝批,如图1至图5所示的优选实施例,包括螺丝批头和壳体1。所述螺丝批头位于所述壳体1的远端。本发明中“远端”、“近端”是针对使用者而言的定义,离使用者比较远的一端为“远端”,离使用者比较近的一端为“近端”。本实施例中,所述壳体1为由第一壳体101和第二壳体102通过卡扣机构103固定在一起形成的具有收容空间的圆筒状结构,简单方便,而且可靠性更高。当然,进一步的超声波焊接,或其他本领域技术人员能想到的固定方式都是可以的。The present invention discloses a precision electric screwdriver, such as the preferred embodiment shown in Figures 1-5, including a screwdriver bit and housing 1. The screwdriver bit is located at a distal end of the housing 1. In the present invention, the "distal end" and "proximal end" are definitions for the user. The end farther from the user is the "distal end", and the end closer to the user is the "near end". In this embodiment, the housing 1 is a cylindrical structure having a receiving space formed by the first housing 101 and the second housing 102 fixed together by the locking mechanism 103, which is simple and convenient, and has higher reliability. . Of course, further ultrasonic welding, or other means of attachment that can be conceived by those skilled in the art, are possible.
所述壳体1的收容空间内设有电机2、电池7和设有开关的电路板8,所述壳体上设有用于控制所述开关的开关按键9,电路板8由所述开关按键9启动并驱动电机7正转或者反转。所述壳体外根据需要可选择地套设有防滑套10,用以符合人体工学设计。The housing 1 of the housing 1 is provided with a motor 2, a battery 7 and a circuit board 8 provided with a switch. The housing is provided with a switch button 9 for controlling the switch, and the circuit board 8 is provided by the switch button. 9 Start and drive the motor 7 forward or reverse. An anti-slip sleeve 10 is optionally sleeved on the outside of the housing for ergonomic design.
所述螺丝批头位于所述壳体1的前方,所述螺丝批头与电机2之间设有用于实现手动及自动模式切换的复合机构。具体的,所述复合机构包括:The screwdriver bit is located in front of the casing 1, and a composite mechanism for realizing manual and automatic mode switching is disposed between the screwdriver bit and the motor 2. Specifically, the composite mechanism includes:
轴承座3,包括阶梯式内腔,结合图3所示,通过凸肩31固定在所述壳体1上;The bearing housing 3, including the stepped inner cavity, is fixed to the housing 1 by a shoulder 31 as shown in FIG. 3;
输出轴4,穿插设于所述轴承座3的内腔且其远端41从所述轴承座3的远端伸出,所述输出轴4的远端41具有用于接收所述螺丝批头的内六角,所述输出轴4的近端42为直径大于其远端41的台阶,所述台阶与所述轴承座3的阶 梯式内腔相匹配防止所述输出轴4从壳体1中轴向掉出;An output shaft 4 is inserted through the inner cavity of the bearing housing 3 and has a distal end 41 extending from a distal end of the bearing housing 3, and a distal end 41 of the output shaft 4 has a receiving portion for receiving the screwdriver bit The inner end of the output shaft 4 is a step having a diameter larger than the distal end 41 thereof. The step is matched with the stepped inner cavity of the bearing housing 3 to prevent the output shaft 4 from being detached from the housing 1. Fall out axially;
以及置于所述轴承座3和输出轴4之间的旋转架5和复数个滚柱50。And a rotating frame 5 and a plurality of rollers 50 disposed between the bearing housing 3 and the output shaft 4.
具体的,所述旋转架5包括背板52和垂直延伸的复数个延伸臂51,所述背板52上设有与所述电机2的机轴相对接的联动轴孔,所述电机2的机轴穿设于所述联动轴孔内后可驱动所述旋转架5一起旋转。Specifically, the rotating frame 5 includes a backing plate 52 and a plurality of extending arms 51 extending vertically, and the backing plate 52 is provided with a linkage shaft hole that is opposite to the crankshaft of the motor 2, and the motor 2 After the crankshaft is inserted into the linkage shaft hole, the rotating frame 5 can be driven to rotate together.
本发明的自动和手动模式的切换与现有技术类似,所述旋转架5配合滚柱50驱动所述输出轴4实现所述精密电动螺丝批的自动模式,所述滚柱50将所述输出轴4与轴承座3相互固定实现所述精密电动螺丝批的手动模式。The automatic and manual mode switching of the present invention is similar to the prior art, in which the rotating frame 5 cooperates with the roller 50 to drive the output shaft 4 to realize an automatic mode of the precision electric screwdriver, the roller 50 will output the output The shaft 4 and the bearing housing 3 are fixed to each other to realize the manual mode of the precision electric screwdriver.
本发明的特点在于:所述输出轴4的台阶的外周面由一组曲面形成,所述一组曲面由相互间隔的外凸面43和内凹面44连接而成。所述旋转架的延伸臂51伸入所述输出轴的近端42与轴承座3之间,所述延伸臂51的内径与所述外凸面43的外径相当,所述滚柱50轴向设置于所述旋转架的背板52与轴承座3的阶梯式内腔之间,周向设置于所述内凹面44与轴承座3之间,且位于相邻延伸臂51之间,所述滚柱50的直径大于所述外凸面43与轴承座3之间的距离且与所述内凹面44与轴承座3之间的最大距离相当。The present invention is characterized in that the outer peripheral surface of the step of the output shaft 4 is formed by a set of curved surfaces which are connected by mutually overlapping outer convex surfaces 43 and concave surfaces 44. An extension arm 51 of the rotating frame extends between the proximal end 42 of the output shaft and the bearing housing 3. The inner diameter of the extension arm 51 is equivalent to the outer diameter of the outer convex surface 43. The roller 50 is axially Between the back plate 52 of the rotating frame and the stepped inner cavity of the bearing housing 3, circumferentially disposed between the inner concave surface 44 and the bearing housing 3, and located between adjacent extending arms 51, The diameter of the roller 50 is larger than the distance between the outer convex surface 43 and the bearing housing 3 and is equivalent to the maximum distance between the inner concave surface 44 and the bearing housing 3.
结合图6和图7所示,本发明在自动模式下,所述滚柱50对所述输出轴4产生转动方向的斜向力D1。现有技术在自动模式下,所述滚柱50对所述输出轴4产生垂直向心力D2。这样,在驱动力F相同的条件下,本发明对内凹面44的驱动力D1=N*Cos b1+F*Sin c1,现有技术对输出轴的驱动力D2=N*Cos a1,其中F:自动模式下电机对滚柱的驱动力、N:轴承座对滚柱的反作用力、D1:输出轴内凹面对滚柱的反作用力、D2:现有技术输出轴平面对滚柱的反作用力、a1:轴承座对滚柱反作用力与轴心的夹角、b:输出轴圆弧面对滚柱的反作用力与轴心的夹角(图中可见)、b1:轴承座对滚柱反作用力在D1力作用方向的分力夹角、c1:电机驱动力与垂直方向的夹角、L1/L2:滚柱分别对输出轴作用力的力臂。结合附图可以看出,驱动力:D1>D2,驱动力臂:L1>L2,本发明对输出轴的驱动力矩:M1=D1*L1,现有技术对输出轴的驱动力矩:M2=D2*L2,由上可得,M1〉M2,使本发明的精密电动螺丝批扭矩增大,驱动效率大于现有技术的电动螺丝批。6 and 7, in the automatic mode, the roller 50 generates an oblique force D1 in the rotational direction of the output shaft 4. Prior Art In the automatic mode, the roller 50 produces a vertical centripetal force D2 to the output shaft 4. Thus, under the same driving force F, the driving force D1=N*Cos b1+F*Sin c1 of the concave surface 44 of the present invention, the driving force D2=N*Cos a1 of the prior art to the output shaft, wherein F : The driving force of the motor to the roller in the automatic mode, N: the reaction force of the bearing seat against the roller, D1: the reaction force of the concave shaft facing the roller in the output shaft, D2: the reaction of the output shaft plane of the prior art to the roller Force, a1: the angle between the bearing seat and the reaction force of the roller and the axis, b: the angle between the reaction force of the output shaft arc facing the roller and the axis (visible in the figure), b1: the bearing seat to the roller The angle of force of the reaction force in the direction of D1 force action, c1: the angle between the driving force of the motor and the vertical direction, L1/L2: the force arm of the roller respectively acting on the output shaft. As can be seen from the drawing, the driving force: D1>D2, driving force arm: L1>L2, the driving torque of the output shaft of the invention: M1=D1*L1, the driving torque of the prior art to the output shaft: M2=D2 *L2, available from above, M1>M2, which increases the torque of the precision electric screwdriver of the present invention, and the driving efficiency is greater than that of the prior art electric screwdriver.
优选的,所述滚柱50的直径可以选择大致等于所述内凹面44与轴承座3 之间的最大距离。这样在本发明的手动模式下,输出轴基本不会产生旋转的空行程,用户体验良好。Preferably, the diameter of the roller 50 can be selected to be substantially equal to the maximum distance between the concave surface 44 and the bearing housing 3. Thus, in the manual mode of the present invention, the output shaft does not substantially generate a rotational idle motion, and the user experience is good.
简单描述一下本发明的手动和自动模式的切换:Briefly describe the switching of the manual and automatic modes of the present invention:
首先是自动模式操作原理,通过控制开关按键9调节电机2的正反转来选择拧紧或移除螺钉,控制开关按键9驱动电机2工作,电机的轴带动旋转架5旋转,支撑架5的延伸臂51驱动滚柱50,滚柱50卡抵输出轴的内凹面44并带动输出轴4转动,具体的,延伸臂51对滚柱50产生图6中的作用力,该作用力再通过滚柱50作用于输出轴4,输出轴4最终带动螺丝批头旋转进行工作。The first is the automatic mode operation principle. By controlling the switch button 9 to adjust the forward and reverse rotation of the motor 2 to select to tighten or remove the screw, the control switch button 9 drives the motor 2 to work, the shaft of the motor drives the rotating frame 5 to rotate, and the extension of the support frame 5 The arm 51 drives the roller 50. The roller 50 is engaged with the concave surface 44 of the output shaft and drives the output shaft 4 to rotate. Specifically, the extension arm 51 generates the force in FIG. 6 on the roller 50, and the force passes through the roller. 50 acts on the output shaft 4, and the output shaft 4 finally drives the screwdriver bit to rotate.
其次是手动式操作原理,当电机不工作或在精细操作要求工况下,直接手动进行拧紧或移除螺钉,螺丝批头旋转螺钉时,螺丝批头对输出轴4产生反作用力,由于所述滚柱50的直径大致等于所述内凹面44与轴承座3之间的最大距离,所以输出轴4转动时,对滚柱50产生的反作用力传递至轴承座3,此时输出轴4、滚柱50及轴承座3相互卡抵相对固定,由于轴承座3与壳体1是固定的,所以输出轴4、滚柱50、轴承座3、壳体1和螺丝批头相对固定,此时螺丝批与普通螺丝批使用方法一致,并且由于大幅减小甚至不会产生输出轴4的空行程,用户体验良好。Followed by the manual operation principle, when the motor does not work or under the fine operation requirements, directly tighten or remove the screw. When the screwdriver bit rotates the screw, the screwdriver bit produces a reaction force to the output shaft 4 due to the The diameter of the roller 50 is substantially equal to the maximum distance between the concave surface 44 and the bearing housing 3, so when the output shaft 4 rotates, the reaction force generated on the roller 50 is transmitted to the bearing housing 3, and at this time, the output shaft 4, the roller The column 50 and the bearing block 3 are relatively fixed to each other. Since the bearing housing 3 and the housing 1 are fixed, the output shaft 4, the roller 50, the bearing housing 3, the housing 1 and the screwdriver bit are relatively fixed. The batch is consistent with the normal screwdriver usage method, and the user experience is good due to the drastic reduction or even the idle stroke of the output shaft 4.
如图1和图3所示,所述轴承座3与所述壳体1之间还设置有减摩垫91,所述减摩垫91套在所述电机2的电机轴外,这样可以降低旋转架与壳体间的摩擦力,提高驱动效率、降低能耗。两段式的输出轴4,制造更方便,也使本发明的精密电动螺丝批的整体长度可以缩短,降低成本,不需要另外设计与轴承座3之间的连接机构。As shown in FIG. 1 and FIG. 3, an anti-friction pad 91 is further disposed between the bearing housing 3 and the housing 1, and the anti-friction pad 91 is sleeved outside the motor shaft of the motor 2, which can be reduced. The friction between the rotating frame and the housing improves driving efficiency and reduces energy consumption. The two-stage output shaft 4 is more convenient to manufacture, and the overall length of the precision electric screwdriver of the present invention can be shortened, the cost is reduced, and the connection mechanism with the bearing housing 3 is not required.
本优选实施例中,所述壳体1的两端分别设置有前锁紧套11和后锁紧套12。所述后锁紧套12设置在尾盖13与壳体1之间,所述尾盖13与壳体1螺纹连接,所述前锁紧套11内设有LED光管14及灯罩15。这样的前后锁紧机构使本发明的整体可靠性更高。当然,本发明中的电池可以是干电池或者可充电电池,当采用可充电电池时,壳体1内包括一充电电路,此时尾盖13也可以直接与壳体1焊接与一体。In the preferred embodiment, the front end of the housing 1 is respectively provided with a front locking sleeve 11 and a rear locking sleeve 12. The rear locking sleeve 12 is disposed between the tail cover 13 and the housing 1 , and the tail cover 13 is screwed to the housing 1 . The front locking sleeve 11 is provided with an LED light tube 14 and a lamp cover 15 . Such front and rear locking mechanisms make the overall reliability of the present invention even higher. Of course, the battery in the present invention may be a dry battery or a rechargeable battery. When a rechargeable battery is used, the housing 1 includes a charging circuit, and the tail cover 13 may be directly welded and integrated with the housing 1.
图8至图11揭示了本发明的第二实施例,与现有技术一样,包括螺丝批头和呈圆管形的壳体1,所述壳体1内设置有电机2,所述螺丝批头与电机2之间 设有用于实现手动及自动模式切换的复合输出机构。8 to 11 disclose a second embodiment of the present invention, which, like the prior art, includes a screwdriver bit and a housing 1 in the shape of a circular tube. The housing 1 is provided with a motor 2, the screwdriver A composite output mechanism for manual and automatic mode switching is provided between the head and the motor 2.
本实施例中,所述壳体1内固定有一支架300,所述支架可以是金属的,也可以是塑料制成,具体结构如图11所示,所述支架300包括一圆环体3001和相互对称且沿所述支架300轴线向近端延伸的两个支片3002;所述圆环体3001的外周上设置有凸起3003,用于与所述壳体1内的凹槽16相匹配紧配合,以使两者相互径向固定;所述圆环体3001的远端端面3004与所述壳体1内的凸起相配合,以使两者相互轴向固定。In this embodiment, a bracket 300 is fixed in the housing 1 , and the bracket may be made of metal or plastic. The specific structure is as shown in FIG. 11 , and the bracket 300 includes a ring body 3001 and Two struts 3002 symmetrical to each other and extending proximally along the axis of the bracket 300; the outer circumference of the annular body 3001 is provided with a protrusion 3003 for matching the groove 16 in the housing 1 The tight fits are such that the two are radially fixed to each other; the distal end face 3004 of the annular body 3001 cooperates with the projections in the housing 1 to axially fix the two.
所述支架300的圆环体3001的近端还设置有向内的凸壁3005(图10中所示),所述支片3002上设置有楔形块3006,两者相互配合将所述电机2轴向固定于所述支架300内部,所述电机2的电机轴指向远端,且伸出于所述凸壁3005所形成的一个圆孔。所述电机2具有扁平表面21,其与所述支片3002的内表面相互配合使所述电机与所述支架300径向固定。这样,装配电机2时就非常简单,将所述电机2卡设在所述支架300的凸壁3005和楔形块3006之间即可。因为所述支片3002的径向延伸结构,导致其具有一定的弹性,适于安装电机。当然,如果电机的外形发生变化,所述支片3002也仅仅只需改变其形状适配所述电机即可。The proximal end of the annular body 3001 of the bracket 300 is further provided with an inward convex wall 3005 (shown in FIG. 10), and the supporting piece 3002 is provided with a wedge block 3006, which cooperate with each other to the motor 2 The motor shaft of the motor 2 is directed to the distal end and protrudes from a circular hole formed by the convex wall 3005. The motor 2 has a flat surface 21 that cooperates with the inner surface of the support piece 3002 to radially fix the motor to the bracket 300. Thus, it is very simple to assemble the motor 2, and the motor 2 can be placed between the convex wall 3005 of the bracket 300 and the wedge block 3006. Because of the radially extending structure of the support piece 3002, it has a certain elasticity and is suitable for mounting a motor. Of course, if the shape of the motor changes, the support piece 3002 simply changes its shape to fit the motor.
所述复合输出机构位于所述支架300的远端,所述支架300的近端设置有电池7,所述支架300内还固定有电路板8,该电路板8可以是柔性线路板,也可以是普通的印刷线路板。所述电路板8与所述电池7的正负两极电性连接。该电池7可以是干电池7或一体充电的锂电池7、镍氢电池7等常见电池。The composite output mechanism is located at the distal end of the bracket 300. The proximal end of the bracket 300 is provided with a battery 7. The circuit board 8 is also fixed in the bracket 300. The circuit board 8 can be a flexible circuit board or It is an ordinary printed circuit board. The circuit board 8 is electrically connected to the positive and negative poles of the battery 7. The battery 7 may be a common battery such as a dry battery 7 or an integrally charged lithium battery 7, a nickel hydrogen battery 7.
如图9所示,所述电路板8通过螺钉22固定于所述支架300上,且一端位于所述电机2的近端。所述电路板8的一端包括所述电池7的正负两极触点,其中正极触点穿过所述支片3002的近端的卡口3007直接与电池7接触,负极触点与位于所述电池7近端的导电筒39和\或导电弹簧38电性连接。所述导电弹簧38通过尾盖13压紧。As shown in FIG. 9, the circuit board 8 is fixed to the bracket 300 by screws 22, and one end is located at the proximal end of the motor 2. One end of the circuit board 8 includes positive and negative two-pole contacts of the battery 7, wherein the positive contact contacts the battery 7 through the bayonet 3007 of the proximal end of the support 3002, and the negative contact is located at the The conductive tube 39 at the proximal end of the battery 7 and the conductive spring 38 are electrically connected. The conductive spring 38 is pressed by the tail cap 13.
所述电路板8的另一端包括一个金属片导体85,所述金属片导体85向远端延伸并电连接于一LED灯板14,所述LED灯板14通过LED灯罩15卡接于所述壳体1的远端。The other end of the circuit board 8 includes a metal piece conductor 85 extending distally and electrically connected to an LED lamp board 14, the LED light board 14 being snapped by the LED lamp cover 15 The distal end of the housing 1.
所述壳体1上设置有两个通孔17,分别有两个开关按键9穿过所述通孔17 按压于所述电路板8的开关触点81,所述开关按键9的两端分别设有倒刺94,用于防止所述开关按键9从所述通孔17掉出。这样,所述开关按键9安装在所述壳体1上,装配的容错率比较高。The housing 1 is provided with two through holes 17 through which two switch buttons 9 are respectively pressed against the switch contacts 81 of the circuit board 8, and the two ends of the switch button 9 are respectively A barb 94 is provided for preventing the switch button 9 from falling out of the through hole 17. Thus, the switch button 9 is mounted on the housing 1 and the assembly fault tolerance is relatively high.
结合图8和图10所示,本发明中所述复合输出机构包括:轴承座3、输出轴4、以及置于所述轴承座3和输出轴4之间的旋转架5和复数个滚柱50。所述轴承座3包括一阶梯式内腔,且固定在所述支架300上。所述轴承座3通过凸肩31固定于所述支架300上。所述输出轴4穿插设于所述轴承座3的内腔且其远端与所述轴承座3的远端平齐,这样导致两者的配合长度大大增加,提高了传动的稳定性,减小现有技术所带来的手颤感觉,达到了降噪的目的。8 and 10, the composite output mechanism of the present invention includes: a bearing housing 3, an output shaft 4, and a rotating frame 5 and a plurality of rollers disposed between the bearing housing 3 and the output shaft 4 50. The bearing housing 3 includes a stepped inner cavity and is fixed to the bracket 300. The bearing housing 3 is fixed to the bracket 300 by a shoulder 31. The output shaft 4 is inserted into the inner cavity of the bearing housing 3 and the distal end thereof is flush with the distal end of the bearing housing 3, so that the mating length of the two is greatly increased, and the stability of the transmission is improved. The hand-feeling sensation brought by the small prior art achieves the purpose of noise reduction.
所述输出轴4的远端具有用于接收所述螺丝批头的内六角且其内部具有磁铁93,所述输出轴4的近端为直径大于其远端的台阶,所述台阶与所述轴承座3的阶梯式内腔相匹配,所述台阶的外周面由一组曲面形成,所述一组曲面由相互间隔的外凸面和内凹面连接而成,所述旋转架5配合滚柱50驱动所述输出轴4实现螺丝批的自动模式,所述滚柱50将所述输出轴4与轴承座3相互固定实现所述螺丝批的手动模式。The distal end of the output shaft 4 has a hexagon socket for receiving the screwdriver bit and has a magnet 93 inside thereof, and the proximal end of the output shaft 4 is a step having a diameter larger than a distal end thereof, the step and the step The stepped inner cavity of the bearing housing 3 is matched, and the outer peripheral surface of the step is formed by a set of curved surfaces formed by connecting mutually convex outer and inner concave surfaces, and the rotating frame 5 is matched with the roller 50. Driving the output shaft 4 to implement an automatic mode of the screwdriver, the roller 50 fixing the output shaft 4 and the bearing housing 3 to each other to implement a manual mode of the screwdriver.
具体的,所述旋转架5包括背板14和垂直延伸的复数个延伸臂81,所述背板14上设有与所述电机2的机轴相对接的联动轴孔,以使所述旋转架5与电机的机轴相联动,所述延伸臂81伸入所述输出轴的近端与轴承座3之间,所述滚柱50轴向设置于所述背板14与轴承座3的阶梯式内腔之间,周向设置于所述输出轴4与轴承座3之间,且位于相邻延伸臂81之间。Specifically, the rotating frame 5 includes a backing plate 14 and a plurality of vertically extending plurality of extending arms 81. The backing plate 14 is provided with a linkage shaft hole that is opposite to the shaft of the motor 2, so that the rotation The frame 5 is coupled to the crankshaft of the motor, and the extension arm 81 extends between the proximal end of the output shaft and the bearing housing 3. The roller 50 is axially disposed on the back plate 14 and the bearing housing 3. The stepped inner chambers are circumferentially disposed between the output shaft 4 and the bearing housing 3 and between the adjacent extension arms 81.
本发明的自动和手动模式的切换与现有技术类似,所述旋转架5配合滚柱50驱动所述输出轴4实现所述精密电动螺丝批的自动模式,所述滚柱50将所述输出轴4与轴承座3相互固定实现所述精密电动螺丝批的手动模式。所述输出轴4的台阶的外周面由一组曲面形成,所述一组曲面由相互间隔的外凸面和内凹面连接而成。本发明在自动模式下,所述滚柱50对所述输出轴4产生转动方向的斜向力,这样使本发明的自动模式下,扭矩增大,驱动效率大于现有技术的电动螺丝批。所述滚柱50的直径可以选择大致等于所述内凹面与轴承座3之间的最大距离,这样使本发明的手动模式下,输出轴基本不会产生旋转的空行程,用户体验良好。本发明的手动和自动模式的切换与现有技术大致类似,在 此不再赘述。The automatic and manual mode switching of the present invention is similar to the prior art, in which the rotating frame 5 cooperates with the roller 50 to drive the output shaft 4 to realize an automatic mode of the precision electric screwdriver, the roller 50 will output the output The shaft 4 and the bearing housing 3 are fixed to each other to realize the manual mode of the precision electric screwdriver. The outer peripheral surface of the step of the output shaft 4 is formed by a set of curved surfaces which are connected by mutually convex outer and inner concave surfaces. In the automatic mode, the roller 50 generates an oblique force in the rotational direction of the output shaft 4, so that the torque in the automatic mode of the present invention is increased, and the driving efficiency is greater than that of the prior art electric screwdriver. The diameter of the roller 50 can be selected to be substantially equal to the maximum distance between the concave surface and the bearing housing 3, so that in the manual mode of the present invention, the output shaft does not substantially generate a rotating idle stroke, and the user experience is good. The switching of the manual and automatic modes of the present invention is substantially similar to the prior art and will not be described again.
如图8和图10所示,所述旋转架5与所述支架300之间还设置有减摩垫91,所述减摩垫91套在所述电机2的电机轴外。这样可以降低支架与壳体间的摩擦力,提高驱动效率、降低能耗。本发明输出轴4的圆柱形外形结构,结构更为紧凑,成本更加低。As shown in FIG. 8 and FIG. 10, an anti-friction pad 91 is disposed between the rotating frame 5 and the bracket 300, and the anti-friction pad 91 is sleeved outside the motor shaft of the motor 2. This can reduce the friction between the bracket and the housing, improve driving efficiency and reduce energy consumption. The cylindrical outer shape structure of the output shaft 4 of the present invention is more compact and lower in cost.
所述轴承座3与所述输出轴4之间设置有密封圈92,可以将轴承座3与输出轴4的近端形成封闭空间,在该空间内可以放置润滑油,这样可以使减摩垫91的效果大大增强,整个螺丝批的静音效果大大增加。A sealing ring 92 is disposed between the bearing housing 3 and the output shaft 4, so that the bearing housing 3 and the proximal end of the output shaft 4 can form a closed space, and lubricating oil can be placed in the space, so that the friction reducing pad can be used. The effect of 91 is greatly enhanced, and the mute effect of the entire screwdriver is greatly increased.
为了让本发明螺丝批的静音效果更好,还可以在所述电机2的外周上包裹一层EVA消音棉。这样电机自身的噪声也会大大降低。这对于需要安静环境工作的工作者来讲帮助是非常大的。In order to make the silent effect of the screwdriver of the present invention better, it is also possible to wrap a layer of EVA muffler cotton on the outer circumference of the motor 2. In this way, the noise of the motor itself is greatly reduced. This is very helpful for workers who need to work in a quiet environment.
虽然本发明已以较佳实施例揭示如上,然其并非用以限定本发明,任何本领域技术人员,在不脱离本发明的精神和范围内,当可作些许的修改和完善,因此本发明的保护范围当以权利要求书所界定的为准。While the present invention has been described in its preferred embodiments, the present invention is not intended to be limited thereto, and the present invention may be modified and improved without departing from the spirit and scope of the invention. The scope of protection is defined by the terms of the claims.
Claims (18)
- 一种精密电动螺丝批,包括螺丝批头和壳体(1),所述壳体(1)内设有电机(2),所述螺丝批头位于所述壳体(1)的前方,所述螺丝批头与电机(2)之间设有用于实现手动及自动模式切换的复合机构,其特征在于:所述复合机构包括A precision electric screwdriver, comprising a screwdriver bit and a casing (1), wherein the casing (1) is provided with a motor (2), the screwdriver bit being located in front of the casing (1) A composite mechanism for realizing manual and automatic mode switching is provided between the screwdriver bit and the motor (2), wherein the composite mechanism comprises轴承座(3),包括一阶梯式内腔,且固定在所述壳体(1)上,a bearing housing (3) including a stepped inner cavity and fixed to the housing (1),输出轴(4),穿插设于所述轴承座(3)的内腔且其远端(41)从所述轴承座(3)的远端伸出,所述输出轴(4)的远端(41)具有用于接收所述螺丝批头的内六角,所述输出轴(4)的近端(42)为直径大于其远端(41)的台阶,所述台阶与所述轴承座(3)的阶梯式内腔相匹配,所述台阶的外周面由一组曲面形成,所述一组曲面由相互间隔的外凸面(43)和内凹面(44)连接而成,An output shaft (4) is inserted through the inner cavity of the bearing housing (3) and has a distal end (41) extending from a distal end of the bearing housing (3), a distal end of the output shaft (4) (41) having a hexagon socket for receiving the screwdriver bit, the proximal end (42) of the output shaft (4) being a step having a diameter larger than a distal end thereof (41), the step and the bearing seat ( 3) The stepped inner cavity is matched, the outer peripheral surface of the step is formed by a set of curved surfaces, and the set of curved surfaces are formed by connecting mutually convex outer convex surfaces (43) and inner concave surfaces (44).以及置于所述轴承座(3)和输出轴(4)之间的旋转架(5)和复数个滚柱(50),所述旋转架(5)配合滚柱(50)驱动所述输出轴(4)实现所述精密电动螺丝批的自动模式,所述滚柱(50)将所述输出轴(4)与轴承座(3)相互固定实现所述精密电动螺丝批的手动模式。And a rotating frame (5) and a plurality of rollers (50) disposed between the bearing housing (3) and the output shaft (4), the rotating frame (5) cooperates with the roller (50) to drive the output The shaft (4) implements an automatic mode of the precision electric screwdriver, and the roller (50) fixes the output shaft (4) and the bearing housing (3) to each other to realize a manual mode of the precision electric screwdriver.
- 如权利要求1所述的精密电动螺丝批,其特征在于,所述旋转架(5)包括背板(52)和垂直延伸的复数个延伸臂(51),所述背板(52)上设有与所述电机(2)的机轴相对接的联动轴孔,以使所述旋转架(5)与电机的机轴相联动,所述延伸臂(51)伸入所述输出轴的近端(42)与轴承座(3)之间,所述延伸臂(51)的内径与所述外凸面(43)的外径相当,所述滚柱(50)轴向设置于所述旋转架的背板(52)与轴承座(3)的阶梯式内腔之间,周向设置于所述内凹面(44)与轴承座(3)之间,且位于相邻延伸臂(51)之间,所述滚柱(50)的直径大于所述外凸面(43)与轴承座(3)之间的距离且与所述内凹面(44)与轴承座(3)之间的最大距离相当。A precision electric screwdriver according to claim 1, wherein said rotating frame (5) comprises a backing plate (52) and a plurality of vertically extending plurality of extending arms (51), said backing plate (52) being provided a linkage shaft hole that is opposite to the shaft of the motor (2) such that the rotating frame (5) is coupled to the shaft of the motor, and the extension arm (51) extends into the vicinity of the output shaft Between the end (42) and the bearing housing (3), an inner diameter of the extension arm (51) is equivalent to an outer diameter of the outer convex surface (43), and the roller (50) is axially disposed on the rotating frame Between the back plate (52) and the stepped inner cavity of the bearing housing (3), circumferentially disposed between the concave surface (44) and the bearing housing (3), and located in the adjacent extension arm (51) The diameter of the roller (50) is greater than the distance between the outer convex surface (43) and the bearing housing (3) and is equivalent to the maximum distance between the inner concave surface (44) and the bearing housing (3). .
- 如权利要求1所述的精密电动螺丝批,其特征在于,自动模式下,所述滚柱(50)对所述输出轴(4)产生转动方向的斜向力。The precision electric screwdriver according to claim 1, wherein in the automatic mode, the roller (50) generates an oblique force in a rotational direction to the output shaft (4).
- 如权利要求1所述的精密电动螺丝批,其特征在于,所述滚柱(50)的直径等于所述内凹面(44)与轴承座(3)之间的最大距离。The precision electric screwdriver of claim 1 wherein the diameter of the roller (50) is equal to the maximum distance between the inner concave surface (44) and the bearing housing (3).
- 如权利要求1至4任一所述的精密电动螺丝批,其特征在于,所述壳体(1)内固定有一支架(300),所述电机(2)固定在所述支架(300)内部,所 述复合输出机构位于所述支架(300)的远端,所述支架(300)的近端设置有电池(7),所述支架(300)内还固定有电路板(8),所述电路板(8)与所述电池(7)的正负两极电性连接。The precision electric screwdriver of any one of claims 1 to 4, wherein a bracket (300) is fixed in the housing (1), and the motor (2) is fixed inside the bracket (300). The composite output mechanism is located at a distal end of the bracket (300), a proximal end of the bracket (300) is provided with a battery (7), and a circuit board (8) is further fixed in the bracket (300). The circuit board (8) is electrically connected to the positive and negative poles of the battery (7).
- 如权利要求5所述的精密电动螺丝批,其特征在于,所述支架(300)包括一圆环体(3001)和相互对称且沿所述支架(300)轴线向近端延伸的两个支片(3002);所述圆环体(3001)的外周上设置有凸起(3003),用于与所述壳体(1)内的凹槽(16)相匹配紧配合,以使两者相互径向固定;所述圆环体(3001)的远端端面(3004)与所述壳体(1)内的凸起相配合,以使两者相互轴向固定。A precision electric screwdriver according to claim 5, wherein said bracket (300) comprises a torus (3001) and two branches that are symmetrical to each other and extend proximally along the axis of said bracket (300) a sheet (3002); a protrusion (3003) is disposed on an outer circumference of the torus (3001) for matching a groove (16) in the housing (1), so that the two The radial end faces (3004) of the annular body (3001) cooperate with the projections in the housing (1) to axially fix the two.
- 如权利要求6所述的精密电动螺丝批,其特征在于,所述支架(300)的圆环体(3001)的近端还设置有向内的凸壁(3005),与设置在所述支片(3002)上的楔形块(3006),一起相互配合来将所述电机(2)轴向固定于所述支架(300)内部,所述电机(2)的扁平表面(21)与所述支片(3002)的内表面相互配合使所述电机与所述支架(300)径向固定。The precision electric screwdriver according to claim 6, wherein the proximal end of the annular body (3001) of the bracket (300) is further provided with an inward convex wall (3005), and is disposed at the branch a wedge block (3006) on the sheet (3002) that cooperate to axially fix the motor (2) axially inside the bracket (300), the flat surface (21) of the motor (2) and the The inner surfaces of the segments (3002) cooperate to radially fix the motor to the bracket (300).
- 如权利要求7所述的精密电动螺丝批,其特征在于,所述电路板(8)通过螺钉(22)固定于所述支架(300)上,且其第一端位于所述电机(2)的近端;所述电路板(8)的第二端包括所述电池(7)的正负两极触点,其中正极触点穿过所述支片(3002)的近端的卡口(3007)直接与电池(7)接触,负极触点与位于所述电池(7)近端的导电筒(39)和\或导电弹簧(38)电性连接。The precision electric screwdriver according to claim 7, wherein said circuit board (8) is fixed to said bracket (300) by a screw (22), and the first end thereof is located at said motor (2) a proximal end of the circuit board (8) comprising positive and negative pole contacts of the battery (7), wherein the positive contact contacts the bayonet of the proximal end of the tab (3002) (3007) Directly in contact with the battery (7), the negative contact is electrically connected to a conductive tube (39) and/or a conductive spring (38) located at the proximal end of the battery (7).
- 如权利要求8所述的精密电动螺丝批,其特征在于,所述壳体(1)上设置有两个通孔(17),分别有两个开关按键(9)穿过所述通孔(17)按压于所述电路板(8)的开关触点(81),所述开关按键(9)的两端分别设有倒刺(94),用于防止所述开关按键(9)从所述通孔(17)掉出。The precision electric screwdriver according to claim 8, wherein the housing (1) is provided with two through holes (17) through which two switch buttons (9) respectively pass ( 17) pressing the switch contact (81) of the circuit board (8), the two ends of the switch button (9) are respectively provided with barbs (94) for preventing the switch button (9) from being The through hole (17) falls out.
- 如权利要求9所述的精密电动螺丝批,其特征在于,所述旋转架(5)与所述支架(300)之间还设置有减摩垫(91),所述减摩垫(91)套在所述电机(2)的电机轴外。The precision electric screwdriver according to claim 9, wherein an anti-friction pad (91) is further disposed between the rotating frame (5) and the bracket (300), and the friction reducing pad (91) Nested outside the motor shaft of the motor (2).
- 如权利要求10所述的精密电动螺丝批,其特征在于,所述轴承座(3)通过凸肩(31)固定于所述支架(300)上。A precision electric screwdriver according to claim 10, wherein said bearing housing (3) is fixed to said bracket (300) by a shoulder (31).
- 如权利要求1至4任一所述的精密电动螺丝批,其特征在于,所述壳 体(1)为由第一壳体(101)和第二壳体(102)通过卡扣机构(103)固定在一起形成的具有收容空间的圆筒状结构。A precision electric screwdriver according to any one of claims 1 to 4, wherein said housing (1) is passed through a latching mechanism (103) by a first housing (101) and a second housing (102) A cylindrical structure having a receiving space formed by being fixed together.
- 如权利要求12所述的精密电动螺丝批,其特征在于,所述轴承座(3)通过凸肩(31)固定于所述壳体(1)上。A precision electric screwdriver according to claim 12, wherein said bearing housing (3) is fixed to said housing (1) by a shoulder (31).
- 如权利要求13所述的精密电动螺丝批,其特征在于,所述轴承座(3)与所述壳体(1)之间还设置有减摩垫(91),所述减摩垫(91)套在所述电机(2)的电机轴外。The precision electric screwdriver according to claim 13, wherein an anti-friction pad (91) is further disposed between the bearing housing (3) and the housing (1), and the friction reducing pad (91) ) is sleeved outside the motor shaft of the motor (2).
- 如权利要求14所述的精密电动螺丝批,其特征在于,所述壳体内还设有电池(7)和设有开关的电路板(8),所述壳体上设有用于控制所述开关的开关按键(9),以及套设在所述壳体外的防滑套(10);所述壳体(1)的两端分别设置有前锁紧套(11)和后锁紧套(12);所述后锁紧套(12)设置在尾盖(13)与壳体(1)之间,所述尾盖(13)与壳体(1)螺纹连接,所述前锁紧套(11)内设有LED光管(14)及灯罩(15)。The precision electric screwdriver according to claim 14, wherein a battery (7) and a circuit board (8) provided with a switch are disposed in the housing, and the housing is provided with a switch for controlling the switch a switch button (9), and a non-slip sleeve (10) sleeved outside the casing; the two ends of the casing (1) are respectively provided with a front locking sleeve (11) and a rear locking sleeve (12) The rear locking sleeve (12) is disposed between the tail cover (13) and the housing (1), the tail cover (13) is screwed to the housing (1), and the front locking sleeve (11) ) There are LED light pipes (14) and lamp covers (15).
- 如权利要求1至4任一所述的精密电动螺丝批,其特征在于,所述轴承座(3)与所述输出轴(4)之间设置有密封圈(92),用于将所述轴承座(3)与输出轴(4)的近端形成封闭空间。A precision electric screwdriver according to any one of claims 1 to 4, characterized in that a seal ring (92) is provided between the bearing housing (3) and the output shaft (4) for The bearing housing (3) forms a closed space with the proximal end of the output shaft (4).
- 如权利要求1至4任一所述的精密电动螺丝批,其特征在于,所述输出轴(4)的远端与所述轴承座(3)的远端平齐。A precision electric screwdriver according to any one of claims 1 to 4, characterized in that the distal end of the output shaft (4) is flush with the distal end of the bearing block (3).
- 如权利要求1至4任一所述的精密电动螺丝批,其特征在于,所述输出轴(4)的远端具有用于接收所述螺丝批头的内六角且其内部具有磁铁(93)。A precision electric screwdriver according to any one of claims 1 to 4, wherein the distal end of the output shaft (4) has a hexagon socket for receiving the screwdriver bit and has a magnet (93) therein. .
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CN201711225511.3 | 2017-11-29 | ||
CN201711225511.3A CN107791188B (en) | 2017-11-29 | Precision electric screw driver | |
CN201810818477.9A CN108747942A (en) | 2018-07-24 | 2018-07-24 | High stability electric screwdriver |
CN201821178088.6U CN209466166U (en) | 2018-07-24 | 2018-07-24 | Super-silent electric screwdriver |
CN201821178088.6 | 2018-07-24 | ||
CN201810818477.9 | 2018-07-24 |
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WO2019105097A1 true WO2019105097A1 (en) | 2019-06-06 |
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EP4257298A1 (en) * | 2022-03-08 | 2023-10-11 | Black & Decker, Inc. | Power tool |
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