CN209425376U - Percussion tool - Google Patents

Abstract

The utility model provides a kind of percussion tool.Even if anvil block is lost, front end will not be separated.Impact wrench (1) includes brushless motor (12), the anvil block (4) of the hammer body (37) and the shaft-like hit along direction of rotation by hammer body (37) that are rotated under the action of brushless motor (12), anvil block (4) includes the cylindrical base end part of shape (46) and the front end (47) with the continuous shape of base end part (46) in rib tubular, and have across base end part (46) and front end (47) along the axle center hole (53) of the axis direction formation of anvil block (4), inserted with pin (55) in axle center hole (53).

Description

Percussion tool

Technical field

The utility model relates to the percussion tools such as impact wrench, impact driver.

Background technique

As percussion tools such as impact wrench, there is known such a percussion tools comprising motor, the drive with motor It moves and the main shaft rotated and the striking mechanism with the hammer body in conjunction with spindle cam, striking mechanism is contained in hammer body shell It is interior, engage hammer body (referring for example to patent document 1) in the anvil block of hammer body housing forward end with being pivotally supported.Here, turn when anvil block When square increases, intermittent rotation hitting power (impact) for being converted to hammer body of main shaft can be acted on anvil block, thus Fastening/disassembly of bolt, screw is carried out using sleeve (socket), screwdriver head for being installed on anvil block etc..

Patent document

Patent document 1: Japanese Unexamined Patent Publication 2018-1314 bulletin

Utility model content

In such percussion tool, such as when carrying out the fastening of bolt, nut using the sleeve for being installed on anvil block, if There is biggish torque along torsional direction effect, then may result in anvil block and lose and separate its front end together with sleeve.

Therefore, the utility model aim is to provide a kind of percussion tool, even if anvil block is lost, front end will not It separates.

To achieve the goals above, utility model described in technical solution 1 is a kind of percussion tool, the percussion tool packet It includes: motor；Hammer body rotates under the action of motor；And the anvil block of shaft-like, the strike along direction of rotation by hammer body, It is characterized in that, anvil block includes the cylindrical base end part of shape and the front end with the continuous shape of base end part in rib tubular Portion, and there is the hole formed in the axial direction in anvil block across base end part and front end, inserted with pin in hole.

Utility model described in technical solution 2 is based on the structure of technical solution 1, which is characterized in that hole is formed in anvil The axle center of seat.

Utility model described in technical solution 3 is based on the structure of technical solution 1, which is characterized in that in front end shape At the through hole having for preventing the sleeve of installation from falling off, the through hole is along the direction shape orthogonal with the axis direction of anvil block Clip the position that through hole is centrosymmetric centered on the axle center by anvil block at, hole and be equipped with a pair, in each hole respectively inserted with Pin.

Utility model described in technical solution 4 is sold based on the structure of any one of technical solution 1~3 by intensity height It is formed in the material of the intensity of anvil block.

Utility model described in technical solution 5 is based on the structure of any one of technical solution 1~4, which is characterized in that In base end part side, the escapement of pin is equipped between hole and pin.

Utility model described in technical solution 6 is based on the structure of technical solution 5, which is characterized in that escapement is It is coated at the elastomer of the inner surface of pin and extruded hole.

Utility model described in technical solution 7 is based on the structure of technical solution 5, which is characterized in that escapement is At least part of pin is pressed into obtained from hole.

Utility model described in technical solution 8 is based on the structure of any one of technical solution 5~7, which is characterized in that Pin is equipped with the holding section engaged with the end face of front end.

To achieve the goals above, utility model described in technical solution 9 is a kind of percussion tool, the percussion tool packet It includes: motor；Hammer body rotates under the action of motor；And the anvil block of shaft-like, the strike along direction of rotation by hammer body, It is characterized in that, the percussion tool includes separating anti-locking mechanism, the anti-locking mechanism of the separation prevents anvil block from work when anvil block is lost Has main body separation.

To achieve the goals above, utility model described in technical solution 10 is a kind of percussion tool, the percussion tool packet It includes: motor；Hammer body rotates under the action of motor；And the anvil block of shaft-like, the strike along direction of rotation by hammer body, It is characterized in that, anvil block includes the cylindrical base end part of shape and the front end with the continuous shape of base end part in rib tubular Portion, and there is the hole formed in the axial direction in anvil block across base end part and front end, it is equipped in the inside in hole across cardinal extremity The coupling member extended in the axial direction to portion and front end, also, in the end and front end of the base end part side of coupling member The end of side is greater than the wide diameter portion of the diameter in hole integrally provided with diameter respectively.

Utility model described in technical solution 11 is based on the structure of technical solution 10, which is characterized in that in front end It is formed with the through hole for preventing the sleeve of installation from falling off, the through hole is along the direction shape orthogonal with the axis direction of anvil block At being formed as the ring-type coaxial with through hole, the internal diameter and ring-type of through hole in through hole set on the wide diameter portion of front end side Wide diameter portion internal diameter it is identical.It should be noted that " identical " here also may include a little error.

Utility model described in technical solution 12 is based on the structure of technical solution 11, which is characterized in that in order to prevent The locking pin that sleeve falls off and passes through from through hole penetrates through cricoid wide diameter portion.

Utility model described in technical solution 13 is based on the structure of technical solution 11 or 12, which is characterized in that connection Component is wire rod, and cricoid wide diameter portion is the O-ring seal locking for the end of wire rod.

Utility model described in technical solution 14 is based on the structure of technical solution 11 or 12, which is characterized in that connection Component is wire rod, and cricoid wide diameter portion is formed by the end of bent wire.

Based on the structure of any one of technical solution 10~14, feature exists utility model described in technical solution 15 In being formed in base end part has bottom outlet with what hole was coaxially connected to, and the wide diameter portion set on base end part side is to have in bottom outlet and connecting The steel ball of structural member connection.

According to the utility model, since there are pins, the anti-locking mechanism of separation, coupling member, even if anvil block is lost, Its front end will not separate.Therefore, it can prevent sleeve from separating from tool body.

Detailed description of the invention

Fig. 1 is the perspective view of impact wrench.

Fig. 2 is the main view of impact wrench.

Fig. 3 is the central longitudinal section view of impact wrench.

Fig. 4 is the enlarged drawing of main part.

Fig. 5 A~Fig. 5 E is the explanatory diagram for being mounted with the anvil block of sleeve, and Fig. 5 A indicates that side view, Fig. 5 B indicate main view, figure 5C indicates that A-A cross-sectional view, Fig. 5 D indicate that anvil block loses the cross-sectional view of state, and Fig. 5 E indicates the section view for the modification for increasing pin Figure.

Fig. 6 A, Fig. 6 B are the explanatory diagrams of the modification for the anvil block for being only pressed into the front end of pin, and Fig. 6 A indicates longitudinal section view, figure 6B indicates that anvil block loses the cross-sectional view of state.

Fig. 7 A, Fig. 7 B are by the explanatory diagram of the modification of the anvil block of entire pin indentation, and Fig. 7 A indicates longitudinal section view, Fig. 7 B table Show that anvil block loses the cross-sectional view of state.

Fig. 8 A~Fig. 8 C is the explanatory diagram that the modification of sleeve is mounted on the anvil block for having bottom outlet, and Fig. 8 A indicates side View, Fig. 8 B indicate that B-B cross-sectional view, Fig. 8 C indicate that anvil block loses the cross-sectional view of state.

Fig. 9 A, Fig. 9 B are the explanatory diagram that the front end of pin has only been pressed into the modification with the anvil block for having bottom outlet, Fig. 9 A table Show that longitudinal section view, Fig. 9 B indicate that anvil block loses the cross-sectional view of state.

Figure 10 A, Figure 10 B are the explanatory diagrams that entire pin has been pressed into the modification with the anvil block for having bottom outlet, and Figure 10 A is indicated Longitudinal section view, Figure 10 B indicate that anvil block loses the cross-sectional view of state.

Figure 11 is the partial front elevation view of the impact wrench of the anvil block with the modification for being equipped with 2 pins.

Figure 12 is the enlarged drawing of the main part of the impact wrench of the anvil block with the modification for being equipped with 2 pins.

Figure 13 A~Figure 13 D is the explanatory diagram that sleeve is mounted on the anvil block of modification for being equipped with 2 pins, and Figure 13 A is indicated Side view, Figure 13 B indicate that main view, Figure 13 C indicate that C-C cross-sectional view, Figure 13 D indicate that anvil block loses the cross-sectional view of state.

Figure 14 A, Figure 14 B are the explanatory diagrams of the modification of the anvil block for the front end indentation for only selling 2, and Figure 14 A indicates vertical profile View, Figure 14 B indicate that anvil block loses the cross-sectional view of state.

Figure 15 A, Figure 15 B are the explanatory diagram that the modification of anvil block of 2 pins is inserted in a manner of movable fit, Figure 15 A Indicate that longitudinal section view, Figure 15 B indicate that anvil block loses the cross-sectional view of state.

Figure 16 A~Figure 16 C is the explanatory diagram for having used the modification of anvil block of wire rod, and Figure 16 A indicates longitudinal section view, figure 16B indicates that D-D cross-sectional view, Figure 16 C indicate E-E cross-sectional view.

Figure 17 is the portion the A enlarged drawing of Figure 16 A.

Figure 18 A~Figure 18 C is the explanatory diagram that sleeve is mounted on the anvil block for the modification for having used wire rod, Figure 18 A table Show that longitudinal section view, Figure 18 B indicate that F-F cross-sectional view, Figure 18 C indicate G-G cross-sectional view.

Figure 19 is the portion the B enlarged drawing of Figure 18 A.

Figure 20 A~Figure 20 C is the explanatory diagram for having used another modification of anvil block of wire rod, and Figure 20 A indicates longitudinal section view, Figure 20 B indicates that H-H cross-sectional view, Figure 20 C indicate I-I cross-sectional view.

Figure 21 is the portion the C enlarged drawing of Figure 20 A.

Description of symbols

1: impact wrench；2: main part；3: handle；4: anvil block；6: battery pack；7: main body cover；8: hammer body shell；12: Brushless motor；13: main shaft；14: striking mechanism；22: rotary shaft；37: hammer body；43: bearing portion；46: base end part；47: front end； 48: arm；53: axle center hole；53a: rear end part；55: pin；56: head；57: ring spring；60: sleeve；67: locking pin； 82: hole；82a: rear end part；83: through hole；90: wire rod；91: steel ball；92:O type sealing ring；95: wide diameter portion；P, P1, P2: Lose position.

Specific embodiment

Hereinafter, being based on Detailed description of the invention the embodiments of the present invention.

Fig. 1 is the perspective view of an example of percussion tool, i.e. impact wrench, and Fig. 2 is main view, and Fig. 3 is central vertical profile View.The impact wrench 1 has is formed down handle 3, side observation in T word on the main part 2 extended along the longitudinal direction The tool body of shape protrudes anvil block 4 from the front end of main part 2 forwards.In the battery installation section 5 for being set to 3 lower end of handle The battery pack 6 for accommodating multiple rechargeable batteries as power supply is installed.

The shell of main part 2 includes being extended the plastic main body cover 7 for having handle 3 and assembling in lower part In the metal hammer body shell 8 of the receiving striking mechanism 14 in 7 front of main body cover.Main body cover 7 is by utilizing left and right directions Screw 9,9 ... assemble pair of right and left one side of something shell 7a, 7b and formed.Outside the main body in shell 7, kept at 8 rear of hammer body shell There is a gear casing 10 of closing 8 rear end of hammer body shell, gear casing 10 is by being provided projectingly on the inner surface of each half of shell 7a, 7b On holding rib 11 kept.

As also shown in Figure 4, brushless motor 12, main shaft 13, striking mechanism 14 are configured in order from rear in main part 2 With anvil block 4, brushless motor 12 is contained in main body cover 7, and main shaft 13, striking mechanism 14 and anvil block 4 are contained in hammer body shell 8 In.

Firstly, brushless motor 12 be include stator 15 and its inside rotor 16 inner-rotor type motor, stator 15 includes: The stator core 17 of tubular, is formed by muti-piece stacked steel plate；Preceding insulating component 18 and rear insulating component 19, it is fixed to be respectively arranged on The end face axially back and forth of sub- iron core 17；And coil 20,20 ..., it is wound in across preceding insulating component 18, rear insulating component 19 Stator core 17.The sensor circuit board for being equipped with rotation detecting element (illustration omitted) is installed on preceding insulating component 18 21, the position for the permanent magnet 24 that rotation detecting element detection is set on rotor 16 simultaneously exports rotation detection signal.

Rotor 16 includes: rotary shaft 22, is located at the axle center of rotor；Substantially cylindric rotor core 23 is laminated more Block steel plate forms, and is configured at around rotary shaft 22；And the permanent magnet 24,24 ... of plate, it is fixed on rotor core 23 It is internal.The rear axle of rotary shaft 22 is supported on the bearing 25 for being maintained at 7 rear portion of main body cover, and front end is pivotally supported in being kept The formation of bearing 26 on gear casing 10, rotary shaft 22 has the front end of pinion gear 27 prominent to the front of gear casing 10.

The position in 25 front of bearing in rotary shaft 22 is equipped with centrifugal fan 28, the main body in 28 outside of centrifugal fan The left and right side of shell 7 is formed with the multiple exhaust outlets 29,29 ... circumferentially arranged, the main body in 21 outside of sensor circuit board The left and right side of shell 7 is formed with the multiple air inlets 30,30 ... arranged along the longitudinal direction.

Main shaft 13 is provided integrally with the planet carrier portion 31 for keeping planetary gear 32,32 ... at rear portion, is formed centrally in rear axle There is bottom outlet 33, the pinion gear 27 for the rotary shaft 22 being projected into bottom outlet 33 is engaged with planetary gear 32.In hammer body shell 8 The ring gear 34 engaged with planetary gear 32 is maintained between aft end interior surface and gear casing 10.In hammer body shell 8, main shaft 13 rear end is pivotally supported by the bearing 35 for being held in gear casing 10.Recess portion 36 is formed in the front end axle center of main shaft 13.

Striking mechanism 14 includes being coated at the hammer body 37 of 13 front of main shaft and forwards to the spiral of the hammer body 37 force Spring 38.Hammer body 37 has a pair of of pawl (not shown) in front surface, and hammer body 37 utilizes and the outer cam slot set on its inner peripheral surface 39 and set on 13 outer peripheral surface of main shaft the ball 41,41 chimeric simultaneously of inside cam path 40 and block in a rotational direction with main shaft 13 It closes.Helical spring 38 is coated at main shaft 13, and front end is inserted into the annular groove 42 of 37 rear surface of hammer body, and its rear end with The front surface in planet carrier portion 31 abuts, and exerts a force to the advanced position to hammer body 37 under normal conditions.

Hammer body shell 8 is in the taper tubular more and more tapering towards front, and it is identical to be formed with inner peripheral surface diameter in front end The bearing portion 43 of path, is cased with bolster 44 outside the front end of bearing portion 43.

Anvil block 4 is made of iron, is in shaft-like, comprising: the cylindrical base end part 46 of shape utilizes bearing shell 45 and main shaft 13 Coaxial ground axle suspension is in bearing portion 43；And shape is in the front end 47 of rib tubular (being square tubular here), with cardinal extremity Portion 46 is coaxial and continuously protrudes forwards, and periphery four sides carries out chamfering, for installing aftermentioned sleeve 60.In base end part 46 Rear end is formed with a pair of of the arm 48,48 engaged in a rotational direction with the pawl of hammer body 37, and in the rear axle of base end part 46 It is formed centrally the protrusion 49 chimeric with the recess portion 36 of main shaft 13.Bearing shell 45 is retained from the aft end interior surface of bearing portion 43 backward Side is prominent, and housing has the gasket 50 supported for the front side to arm 48,48 in its back-end.

In addition, annular groove 51 is formed in the front end periphery of front end 47, in annular groove 51 also as shown in Fig. 5 A~Fig. 5 E Spring arch clasp 52 is cased with outside upper, spring arch clasp 52 squeezes the inner surface of sleeve 60 and applies anticreep resistance to sleeve 60.

In addition, being formed with the axle center hole 53 of the circular in cross-section in the hole as the utility model, axis in the axle center of anvil block 4 Heart hole 53 is passed through front end 47 from the front surface of front end 47 and is rearward extended, and the diameter of the opening portion 54 of front-surface side compared with Greatly, in the substantially length range in the axle center hole 53 in a manner of movable fit inserted with as separating the transversal of anti-locking mechanism The rounded pin 55 in face, pin 55 have the head 56 of major diameter as the holding section chimeric with opening portion 54.In the rear end of pin 55 The ring spring 57 as escapement (elastomer) is cased with outside portion, ring spring 57 with the inner surface of axle center hole 53 by abutting Carry out anti-shotpin 55 to fall off.The pin 55 is made of iron as anvil block 4.

The sleeve 60 for being installed on front end 47 is cylindrical in shape, comprising: large-diameter portion 61, offering can be with hex bolts etc. The chimeric front observation in head is in the hexagonal hole 62 of regular hexagon；And small diameter portion 63, coaxially link with large-diameter portion 61, shape Observe square square hole 64 in the chimeric front in the front end Cheng Youyu 47.It is not shown that energy housing is formed on small diameter portion 63 O-ring seal groove 65, hole 66 orthogonal with the axis vertical take-off of small diameter portion 63 is formed through on the position of groove 65. The rear end of the axle center hole 53 and pin 55 that are installed in the state of front end 47 is located at the front surface of the arm 48 than anvil block 4 on the front Position, and be positioned at the rear end position rearward than sleeve 60.

On the other hand, it is equipped with trigger switch 70 on the top of handle 3, and is equipped with the forward and reverse switch bar 72 of brushless motor 12, The trigger 71 of trigger switch 70 protrudes forwards.The part for being located at 71 top of trigger of shell 7 is formed with extended outside the main body Portion 73, extended portion 73 cover the lower surface of hammer body shell 8, and are projected into the position than trigger 71 on the front, in extended portion 73 Front end be equipped with the lighting unit 74 with LED75 that is irradiated to the front of anvil block 4.

Accommodate controller 76 and terminal board 78 in battery installation section 5, controller 76 includes equipped with being used to control nothing The terminal electricity of the battery pack 6 of the control circuit board 77 of switch element, the microcomputer of brush motor 12 etc., terminal board 78 and installation Connection.In addition, being equipped with switch panel 79 in battery installation section 5, switch panel 79 is electrically connected with control circuit board 77, is had and is beaten Hit power switch bar and display lamp etc..In addition, being screwed front observation in U-shaped in the left side of battery installation section 5 One end of hook 80.

In the impact wrench 1 constituted as described above, when push operation trigger 71, trigger switch 70 is connected, nothing Brush motor 12 is driven under the power supply effect of battery pack 6.That is, the microcomputer of control circuit board 77 is obtained by sensor The rotation detection signal of the position of the permanent magnet 24 of the expressions rotor 16 of the rotation detecting element output of circuit board 21 and obtain turn The rotation status of son 16, the ON/OFF of each switch element is controlled according to the rotation status of acquisition, electric current is made to flow successively through stator 15 Each coil 20 and make rotor 16 rotate.Therefore, rotary shaft 22 rotates and the planetary gear 32 in planet carrier portion 31 is made to carry out planet Movement, thus makes main shaft 13 be rotated in deceleration, then rotates hammer body 37 by ball 41, and therefore, the anvil block 4 engaged with hammer body 37 revolves Then bolt etc. can be fastened using sleeve 60.In addition, if Operation switch panel 79 and trigger lamp in ON state Switch 70 is connected and lights LED75, to be irradiated to the front of sleeve 60.

When the torque of anvil block 4 is increased with the progress of fastening, hammer body 37 overcomes the effect of helical spring 38 and one side It rolls ball 41 rearward along inside cam path 40 to retreat on one side, when pawl and the disengaging of arm 48, hammer body 37 is in spiral bullet It rolls ball 41 forwards along inside cam path 40, to advance while rotating, makes pawl and arm Portion 48 engages once again and anvil block 4 is made to generate rotation hitting power (impact).It, can be into one by being intermittently iteratively produced the impact Step is fastened.

Then, even if anvil block 4 is made position P of the anvil block 4 as shown in figure 5d in front end 47 by biggish torque Place loses, and the pin 55 being inserted in axle center hole 53 in a manner of movable fit also can be from losing, because pin 55 is not easily susceptible to turn round Turning stress.Therefore, the part of front end 47 lost will not separate under the action of pin 55 and be maintained at together with sleeve 60 Original position can prevent the part lost and sleeve 60 from falling.In particular, the head 56 of pin 55 is relatively large in diameter, therefore logical It crosses head 56 and can effectively prevent the front end portion lost with the engaging of opening portion 54 and separate.

In this way, anvil block 4 includes the cylindrical base end part 46 and and base of shape according to the impact wrench 1 of aforesaid way The continuous shape in end 46 is in the front end 47 of rib tubular, and has across base end part 46 and 47 ground of front end the edge in anvil block 4 The axle center hole 53 that axis direction is formed, inserted with pin 55 in axle center hole 53, therefore, even if anvil block 4 is lost, due to pin 55 Presence, front end 47 will not separate, therefore can prevent sleeve 60 from separating and falling from main part 2.

In particular, axle center hole 53 to be formed in the axle center of anvil block 4 here, therefore pin 55 can be configured and be not easily susceptible to turn round The position of turning stress, to reduce the risk that pin 55 is lost.

In addition, in 46 side of base end part therefore the escapement between axle center hole 53 and pin 55 equipped with pin 55 can hinder Pin 55 is detached from from base end part 46 when only front end 47 is lost, to be reliably prevented the separation of front end 47.

In addition, escapement uses the ring spring for being coated at pin 55 and being squeezed the inner surface of axle center hole 53 57, therefore can simply carry out the anticreep of pin 55.

Moreover, pin 55 is equipped with the head 56 engaged with the end face of front end 47, therefore the pin 55 for having carried out anticreep can be utilized It is effectively prevented the separation of front end 47.

It should be noted that the rear end of axle center hole 53 and pin 55 can also rearward extend to arm as shown in figure 5e Position at 48 front surface.This point is also the same in modification below.In addition, the elastomer as escapement It, can also be using O-ring seal etc. other than ring spring.

Wherein, the escapement of pin 55 is not limited to ring spring 57, can also be as shown in Fig. 6 A, Fig. 6 B, using general The internal diameter of the only rear end part 53a of axle center hole 53 be made into and pin 55 roughly same outer diameter, so that the rear end of pin 55 is pressed into Construction in rear end part 53a.

It, can also as shown in Figure 7 A, 7 B, using will be in the overall length of axle center hole 53 in addition, as escapement Diameter be made into and pin 55 roughly same outer diameter, so that entire pin 55 to be pressed into the construction in axle center hole 53.In this case, whole A pin 55 all carries out anticreep, thus the opening portion 54 of major diameter, head 56 there is no need to.But due to pin 55 is whole all can be by To distorting stress, therefore in order to avoid pin 55 and front end 47 are lost simultaneously, though they be all it is iron, also opposite to improve pin 55 intensity.

In this way, escapement uses when at least part of pin 55 is pressed into the form in axle center hole 53, it also can be simple Ground carries out the anticreep of pin 55.

In addition, can further decrease pin 55 if forming pin 55 with the material that intensity is higher than anvil block 4 and anvil block 4 is rolled over together The risk of damage.Wherein, pin is not limited to use as anvil block iron, can also be with other materials such as the resin of apparatus flexible, alloy Material is to be made.

In addition to this, the shape of anvil block 4 is also not necessarily limited to aforesaid way, such as shown in Fig. 8 A~Fig. 8 C, when in anvil block 4 Rear axle be formed centrally for main shaft 13 front end insertion before have bottom outlet 58 when, axle center hole 53 can be formed through to preceding have Until bottom outlet 58 is connected to, and the pin 55 with ring spring 57 is inserted into a manner of movable fit.It can also be utilized using the construction Pin 55 prevents sleeve 60 from falling.

In addition, in the case where the construction, it can also be as shown in Fig. 9 A, Fig. 9 B by the rear end part of axle center hole 53 The internal diameter of 53a is made into and the diameter of pin 55 is roughly the same and carry out local indentation, or will be whole as shown in Figure 10 A, Figure 10 B The internal diameter of a axle center hole 53 is made into and the diameter of pin 55 is roughly the same and carry out whole indentation to constitute escapement.

Moreover, the diameter expectation of pin 55 is set as the width of the chamfered part of front end 47 in aforesaid way, each modification 25% or less (width H shown in Fig. 4).Because if more than the value, then the defect part of front end 47 is excessive, front end 47 Effective sectional area reduces, and will lead to strength reduction.In addition, the distorting stress for acting on pin 55 can also become larger when torque becomes larger, Even if therefore in the range below 25%, it is also desirable in setting as torque becomes larger and reduce the ratio of the diameter of pin 55.

On the other hand, pin 55 is not limited to 1, can also be equipped with 2.Figure 11,12 show such a example, impact The structure of spanner 1 itself is roughly the same with foregoing manner, therefore omits repeated explanation.

Here anvil block 4 is formed centrally in rear axle as Fig. 8 A~Fig. 8 C and inserts for the protrusion 81 for being set to 13 front end of main shaft There is bottom outlet 58 before entering.Also as shown in Figure 13 A~Figure 13 D, at the center up and down centered on axis of the front end of anvil block 4 47 A pair of holes 82,82 is formed on symmetrical position, the rear end in hole 82,82 is formed to than preceding there is the front end of bottom outlet 58 slightly by front Position.Part between the hole 82,82 of front end 47 is formed through through hole 83, through hole 83 and the sleeve 60 of installation Orthogonal hole 66 is penetrated through for anticreep pin together.Moreover, entire indentation is fixed with pin 55 made of iron respectively in each hole 82, pin 55 Diameter is roughly the same with the internal diameter in hole 82, and intensity is higher than anvil block 4.

It is set hole 82,82 is clipped through hole 83 on the position being centrosymmetric centered on the axle center of anvil block 4 in this way Have a pair, and in the case where being inserted into each hole 82 pin 55 be respectively also it is the same, even if anvil block 4 is led to anvil by larger torque Seat 4 is lost at the position P of front end 47 like that as illustrated in figure 13d, and pin 55,55 also can be from deforming and losing.Therefore, The part of front end 47 lost will not separate under the action of pin 55,55 of indentation, can be maintained at together with sleeve 60 Original position can prevent it from falling.

In such a situation it is preferred that the intensity of pin 55,55 is made to be higher than anvil block 4.

It should be noted that whole indentation is also not necessarily limited in the case where pin 55 has 2, it can also be such as Figure 14 A, Figure 14 B Roughly same outer diameter and carries out local indentation for the shown diameter and pin 55 for like that, only making the rear end part 82a in each hole 82, and makes Head 56 engages with the opening portion 84 of major diameter.

In addition it is also possible to which entire pin 55 is inserted into hole 82 in a manner of movable fit as shown in Figure 15 A, Figure 15 B In, and make the inner surface of 57 extruded hole 82 of the ring spring for being coated at 55 rear end of pin to realize anticreep.

In addition, the length of pin 55 can also be lengthened further, 82 He of hole if the rear end of anvil block 4 is without before there is bottom outlet 58 The quantity of pin 55 also can be set to 3 or more and be configured on concentric circles.

On the other hand, it to prevent sleeve from falling the pin being not limited to using circular in cross-section, can also be in using cross section Rectangular, polygon, flat component etc. prevent component as the separation for separating anti-locking mechanism, even if lose so as to anvil block It will not be separated from tool body.In such a case it is possible to consider with separation prevent component be fixed from the periphery of anvil block and It avoids anvil block from separating, or will prevent component from linking with separation between anvil block and shell (also including hammer body shell, bolster) Come and anvil block is avoided to separate.

Moreover, in the case where having bottom outlet 58 and through hole 83 before anvil block 4 has as Figure 11, Figure 12, in addition to being equipped with 2 Pin above-mentioned modification except, it is also contemplated that this modification shown in Figure 16 A~Figure 16 C.

Here, axle center hole 53 is set at the axle center of anvil block 4, wire rod of the insertion as coupling member into the axle center hole 53 90.The rear end of wire rod 90 is fixed by caulking to be set to before have the steel ball 91 as wide diameter portion in bottom outlet 58, the diameter of steel ball 91 is big In the diameter of axle center hole 53.On the other hand, in the front of axle center hole 53, coaxially configured with as wide diameter portion in through hole 83 O-ring seal 92, O-ring seal 92 be formed as diameter be greater than axle center hole 53 diameter, the front end of wire rod 90 is in through hole 83 The interior locking O-ring seal 92 of perforation.The front end of wire rod 90 after penetrating through locking O-ring seal 92 is turned back into axle center hole 53, at To be inserted in the folded-back part 93 in axle center hole 53 along the middle part of wire rod 90.As shown in figure 17, it is formed in through hole 83 The retention groove 94 of O-ring seal 92 is kept in the front of axle center hole 53, retention groove 94 is formed as cyclic annular, is held in retention groove 94 O-ring seal 92 internal diameter it is identical as the internal diameter of through hole 83.As long as the internal diameter of the O-ring seal 92 can supply aftermentioned locking pin 67 perforations, therefore can also have little bit different with the internal diameter of through hole 83.

Therefore, as shown in Figure 18 A~Figure 18 C, as long as being fitted into sleeve 60 to the front end of anvil block 4 47, and by locking pin 67 It is inserted in orthogonal hole 66 and through hole 83 simultaneously, then O-ring seal 68 is coated in groove 65, civilian dress has got well sleeve 60.This When, as also shown in Figure 19, in through hole 83, locking pin 67 penetrates through O-ring seal 92, therefore using O-ring seal 92 and prevents Out of stock 67 prevent the front end of wire rod 90 to deviate from rearward.In addition, preventing the rear end of wire rod 90 forwards using steel ball 91 Side abjection.Therefore, because there are the wire rods 90 that front and back end has carried out anticreep, therefore, even if front end 47 is for example than O-shaped sealing Circle 92 is lost at position (position P1 shown in Figure 18 A) rearward, and front end 47 will not separate, sleeve 60 It will not separate.Further, since prevent sleeve 60 to separate using the locking pin 67 of perforation O-ring seal 92, therefore, even if It is lost at the position (position P2 shown in Figure 18 B) of through hole 83, front end 47 will not separate.

In this way, the modification according to shown in Figure 16 A~Figure 16 C, in the inside of axle center hole 53, across base end part 46 and front end 47 ground are equipped with the coupling member (wire rod 90) extended along the axis direction of anvil block 4, and at the end of 46 side of the base end part of wire rod 90 The end of 47 side of portion and front end is integrally formed with wide diameter portion (steel ball 91, O-shaped sealing of the diameter greater than the diameter of axle center hole 53 respectively 92) circle, therefore, even if anvil block 4 is lost, also can avoid front end 47 from separating using the presence of wire rod 90.Therefore, It can prevent sleeve 60 from separating and falling from main part 2.

In particular, the internal diameter for the O-ring seal 92 being disposed through in hole 83 in 47 side of front end is set as and is penetrated through here The internal diameter in hole 83 is identical, therefore, even if setting O-ring seal 92, can also penetrate locking pin 67 without barrier.

Further, since locking pin 67 penetrates through O-ring seal 92, therefore the abjection of wire rod 90 can be prevented (anti-using locking pin 67 Only sleeve 60 is separated and is fallen).

In addition, coupling member uses wire rod 90, cricoid wide diameter portion uses the O-ring seal of locking 90 end of wire rod 92, thus, it is possible to simply prevent front end 47 from separating and falling.

Moreover, the wide diameter portion for being set to 46 side of base end part, which uses, preceding the steel ball 91 linked in bottom outlet 58 with wire rod 90, Thus, it is possible to simply by the anticreep for preceding having bottom outlet 58 to carry out wire rod 90.

It should be noted that the wide diameter portion of 47 side of front end uses O-ring seal, but unlimited in above-mentioned modification In this, made of metal also can be set, the ring body of resin carrys out locking wire rod.In addition it is also possible to such as Figure 20 A~Figure 20 C, Tu21Suo Show like that, the front end looped-shaped bending of wire rod 90 is formed into wide diameter portion 95, which is maintained in retention groove 94 simultaneously Folded-back part 93 is inserted into axle center hole 53 and realizes anticreep.

In this way, as long as the end of bent wire 90 forms cricoid wide diameter portion 95, it will be able to simply carry out anticreep.

On the other hand, the wide diameter portion of base end part side can also be using other components such as pins other than steel ball, can also not Using other components by the rear end looped-shaped bending of wire rod, hook-shaped form wide diameter portion.

In addition, hole is not limited to the case where being set to anvil block axle center, eccentric position can also be set to and utilize coupling member and expansion Diameter portion realizes anticreep, and multiple holes can also be arranged and coupling member and wide diameter portion is respectively set.It should be noted that more being equipped with When a hole, such as it is also contemplated that clip axle center setting pair of right and left hole, a wire rod is penetrated into a pair of holes, and make wire rod Front takes a round to form wide diameter portion along the retention groove of through hole.

Wherein, coupling member is not limited to wire rod, can also be using made of metal, pin of resin etc..In this case expanding Portion can also be formed as with the independent component of coupling member, or be integrally formed therewith.

In addition to this, it is the tool of brushless type, without using battery pack and using exchange that percussion tool, which is also possible to motor not, The tool of power supply, percussion tool are not limited to impact wrench, and impact driver, the angular impact that anvil block is arranged at a right angle with main shaft are pulled Hand, angular impact driver etc. can also use the utility model.Such as in impact driver, in order to be inserted into installation screwdriver head, It is contemplated that configuring 1 or 2 pin in the radial outside for being set to the mounting hole in anvil block axle center.

Claims (15)

1. a kind of percussion tool, the percussion tool include:

Motor；

Hammer body rotates under the action of the motor；And

The anvil block of shaft-like, the strike along direction of rotation by the hammer body,

It is characterized in that,

The anvil block includes the cylindrical base end part of shape and the front end with the continuous shape of the base end part in rib tubular Portion, and there is the hole formed in the axial direction in the anvil block across the base end part and the front end,

Inserted with pin in the hole.

2. percussion tool according to claim 1, which is characterized in that

The hole is formed in the axle center of the anvil block.

3. percussion tool according to claim 1, which is characterized in that

Be formed with the through hole that falls off of sleeve for preventing installation in the front end, the through hole along with the anvil block The orthogonal direction of axis direction is formed, and the hole is clipped the through hole and is centrosymmetric centered on the axle center of the anvil block Position be equipped with a pair, respectively inserted with the pin in each hole.

4. percussion tool described in any one of claim 1 to 3, which is characterized in that

The material for the intensity that the pin is higher than the anvil block by intensity is formed.

5. percussion tool described in any one of claim 1 to 3, which is characterized in that

In the base end part side, the escapement of the pin is equipped between the hole and the pin.

6. percussion tool according to claim 5, which is characterized in that

The escapement is the elastomer for the inner surface for being coated at the pin and squeezing the hole.

7. percussion tool according to claim 5, which is characterized in that

The escapement is that at least part of the pin is pressed into obtained from the hole.

8. percussion tool according to claim 5, which is characterized in that

The pin is equipped with the holding section engaged with the end face of the front end.

9. a kind of percussion tool, the percussion tool include:

Motor；

Hammer body rotates under the action of the motor；And

The anvil block of shaft-like, the strike along direction of rotation by the hammer body,

It is characterized in that,

The percussion tool includes separating anti-locking mechanism, and the anti-locking mechanism of the separation prevents the anvil block from work when the anvil block is lost Has main body separation.

10. a kind of percussion tool, the percussion tool include:

Motor；

Hammer body rotates under the action of the motor；And

The anvil block of shaft-like, the strike along direction of rotation by the hammer body,

It is characterized in that,

The anvil block includes the cylindrical base end part of shape and the front end with the continuous shape of the base end part in rib tubular Portion, and there is the hole formed in the axial direction in the anvil block across the base end part and the front end,

It is equipped with the coupling member across the base end part and the front end extended along the axis direction in the inside in the hole, Also, in the end of the base end part side of the coupling member and the end of the front end side respectively integrally provided with diameter Greater than the wide diameter portion of the diameter in the hole.

11. percussion tool according to claim 10, which is characterized in that

Be formed with the through hole that falls off of sleeve for preventing installation in the front end, the through hole along with the anvil block The orthogonal direction of axis direction is formed, and the wide diameter portion set on the front end side is formed as passing through with this in the through hole The coaxial ring-type of through-hole, the internal diameter of the through hole are identical with the internal diameter of the cricoid wide diameter portion.

12. percussion tool according to claim 11, which is characterized in that

The locking pin that the sleeve falls off and passes through from the through hole in order to prevent penetrates through the cricoid wide diameter portion.

13. percussion tool according to claim 11 or 12, which is characterized in that

The coupling member is wire rod, and the cricoid wide diameter portion is the O-ring seal locking for the end of the wire rod.

14. percussion tool according to claim 11 or 12, which is characterized in that

The coupling member is wire rod, and the cricoid wide diameter portion is formed by being bent the end of the wire rod.

15. percussion tool according to claim 10, which is characterized in that

Being formed in the base end part has bottom outlet with what the hole was coaxially connected to, the wide diameter portion set on the base end part side For in the steel ball having in bottom outlet with coupling member connection.