CN207256111U - Centrifugal big torsion electric wrench - Google Patents

Abstract

A kind of centrifugal big torsion electric wrench is the utility model is related to, including housing, drive motor, output shaft, impact block and working shaft, drive motor, output shaft, impact block are arranged in housing, working shaft is arranged on the front side of housing and rear end is equipped with passive impact portion.The utility model is provided with the active impulse member that can outwards get rid of under the action of the centrifugal force in the front portion of impact block, drive motor drives impact block to rotate by output shaft, and when drive motor rotating speed reaches a certain level, output shaft promotes impact block to move forward, at this time, the active impulse member of impact block front end is thrown out of and is engaged shock with the passive impact portion for the shaft rear end that works under the action of the centrifugal force, so as to provide larger torsion for electric wrench, when impact block increases to particular value in the load suffered by working shaft, impact block is subject to passive impact portion compressing power and then being moved rearwards backward, active impulse member is set to be separated with passive impact portion, in cycles, big torsion is constantly provided for electric wrench, it is easy to operate.

Description

Centrifugal big torsion electric wrench

Technical field

It the utility model is related to a kind of centrifugal big torsion electric wrench.

Background technology

Electric impact wrench is used as the installation of output shaft by the way that impact force produced by the hammer being driven in rotation is applied to Seat is so as to tighten bolt or nut.Existing electric impact wrench generally comprises drive motor, gear reduction and impact dress Put, which includes engaging by the active impulse member of the output shaft rotation driving of gear reduction, with active impulse member Passive impact block and be connected to passive impact block and rotating working shaft driven by passive impact block, active impulse member is in work Make selectively to be disengaged from and disengage with passive impact block when the load suffered by axis increases to particular value, so that in direction of rotation On intermittent impact is imposed to working shaft.

Application publication number is CN102458772A Chinese invention patent applications《Impact wrench》(application number： CN200980159697.4 a kind of structure) is disclosed, it possesses：Main shaft, its is cylindrical and is driven by motor to rotate；Peace Seat is filled, it is configured at the front in the rotation axis direction of main shaft, and its rotation axis is consistent with the axis of main shaft, and mounting base exists Front portion has hole and the first claw is provided with rear portion, and the squared shaft sections or screwdriver drill bit for being provided with the sleeve body tightened are inserted Enter the hole；Main ram, it is chimeric with the periphery of main shaft, and the second claw engaged with the first claw, main ram are provided with front portion It can be rotated and can moved in the axial direction centered on the rotation axis of the main shaft；Pair hammer, it has forms with main ram Rotating cylindrical portion is integratedly carried out, the inner space of main shaft through the inner space of the cylindrical portion and the cylindrical portion is accommodated with The main ram；Rotary impact mechanism, it is arranged between main shaft and the main ram, super when being acted between main shaft and the main ram When crossing the torque of setting, make main ram rotate and to the mounting base direction advance, and with making the second claw impact with The first claw engaging, so as to impact the first claw, and rotates about the axis mounting base；Core holding mechanism, it is so that secondary The rotation axis of the hammer state consistent with the rotation axis of main shaft keeps the rotation axis of the secondary hammer.Although above-mentioned spanner structure Possess impact function, but complicated integral structure, using conventional impact block structure, torsion is not big enough, has much room for improvement.

Utility model content

Technical problem to be solved in the utility model is the present situation for the prior art, there is provided a kind of conjunction simple in structure Reason, easy to operate centrifugal big torsion electric wrench.

Technical solution is used by the utility model solves above-mentioned technical problem：A kind of centrifugal big torsion electric wrench, Including

Housing；

Drive motor, in the housing；

Output shaft, is driven in the housing and by drive motor and rotated；

Impact block, what can be moved back and forth is arranged on front side of the output shaft and can be revolved with the rotation of output shaft around own axes Turn；

Working shaft, what can be rotated is arranged on front side of the housing, and the rear end of the working shaft is provided with passive impact portion；

It is characterized in that：Axially disposed mounting groove is offered on the periphery wall of the impact block, is set in the mounting groove It is equipped with outwards throw away and be engaged with passive impact portion under the rotating centrifugal force effect of impact block and hits so that working shaft revolves The active impulse member turned, being additionally provided with the impact block can be such that active impulse member remains with passive impact portion in separating The limit assembly of gesture.

In such scheme, the axial arranged connecting shaft of vertical impact block, the active are provided with the mounting groove Impulse member is arranged in mounting groove by what the connecting shaft can rotate, under the impact block rotary state, the active impulse member Front end is turned out around connecting shaft and shock is engaged with passive impact portion, and the impact block stops operating under state, the master The front end of dynamic impulse member, which inwardly rotates around connecting shaft and departs from passive impact portion, cancels shock.Using the structure, so as to actively rush Realization impact can outwards be thrown away and then provide larger torsion under the action of the centrifugal force by hitting part.

Preferably, the limit assembly includes the first spring and press part, vertical axial is provided with the impact block The mounting hole of arrangement, and the openend of the mounting hole is exposed in mounting groove, first spring is arranged in the mounting hole, described Press part is connected to the end of the first spring and offsets with the lower surface at active impulse member rear portion, so that active impulse member is protected all the time Hold the trend inwardly rotated around connecting shaft.The position of active impulse member is resetted using the structure, it is simple in structure, easy to fill Match somebody with somebody.

In order to make active impulse member and passive impact portion no-float, edge is offered on the periphery wall of the impact block front end Gap slot circumferentially, is assembled under completion status, and what the passive impact portion of the working shaft can rotate is inserted in the gap slot In, the front end of the active impulse member is stretched under impact block rotary state in the gap slot to be in contact with passive impact portion.

In the above embodiments, the electric wrench further includes gear reduction, and the drive motor is motor, should The input terminal of motor is connected with power supply, and the output terminal of the motor is connected with the input terminal of the gear reduction, described Output shaft is the output terminal of gear reduction.Using the structure, so that electric wrench flexible operation.

Preferably, the electric wrench further includes connecting rod and second spring, and front and rear perforation is offered on the output shaft Connecting hole, what the connecting rod can move back and forth be arranged in the connecting hole and front end is through the rear end of connecting hole and impact block Locking connection, the second spring are arranged between output shaft and connecting rod and prevent connecting rod from departing from output shaft.Using the structure, Can move back and forth impact block is arranged on front side of motor, easy to assembly.

For the ease of assembling, the rear portion of the connecting hole is formed with installing the extended cavity of second spring, the connection The rear end of bar has limited block, and the second spring is placed on the periphery of connecting rod and the front end face of front end and extended cavity offsets, Rear end offsets with limited block.

Preferably, the rear end of the impact block is offered from the follow-up slot extended forward, and the slot is opposite with two The plane of arrangement, the planar back portion are provided with the front end insertion that can supply output shaft and the resigning to match with the periphery wall of output shaft Groove, the output shaft front end offer the mating groove extended from front to back, and the side wall of the mating groove be configured to from front to back by Gradually stretch out and inclined-plane impact block to be promoted forward can be coordinated with respective planes.Using the structure, when electric wrench is run, Motor speed reaches a certain level, and inclined-plane can produce forward thrust to impact block, so that impact block moves forward, and then make The active impulse member being thrown out of is in contact with passive impact portion and forms protective effect to power delivery section.

For the ease of connection, the front end of the impact block has extended to form forward a connecting portion, corresponding, the working shaft Rear end be provided with for connecting portion insertion opening.

Compared with prior art, the utility model has the advantage of：The utility model is simple and reasonable for structure, in impact block Front portion be provided with the active impulse member that can outwards get rid of under the action of the centrifugal force, in use, drive motor is driven by output shaft Impact block rotates, and when drive motor rotating speed reaches a certain level, output shaft promotes impact block to move forward, at this time, impact The active impulse member of block front end is thrown out of and is engaged shock with the passive impact portion for the shaft rear end that works under the action of the centrifugal force, from And larger torsion is provided for electric wrench, when impact block increases to particular value in the load suffered by working shaft, impact block is subject to Passive impact portion compressing power and then being moved rearwards backward, makes active impulse member be separated with passive impact portion, in cycles, no Break and big torsion is provided for electric wrench, it is easy to operate.

Brief description of the drawings

Fig. 1 is the structure diagram of the utility model embodiment；

Fig. 2 is the phantom of Fig. 1；

Fig. 3 is the assembling structure exploded view of impact block and working shaft in the present embodiment；

Fig. 4 is the structure diagram of output shaft in Fig. 2.

Embodiment

The utility model is described in further detail below in conjunction with attached drawing embodiment.

As shown in figures 1-4, the centrifugal big torsion electric wrench of the present embodiment includes housing 1, drive motor 2, The gear deceleration Mechanism 3, output shaft 4, impact block 5 and working shaft 6.Above-mentioned drive motor 2, gear reduction 3, output shaft 4, impact block 5 are equal In housing 1, working shaft 6 is arranged on the front side of housing 1.

The drive motor 2 of the present embodiment is a motor, and the input terminal of the motor is connected with power supply, the output terminal of the motor with The input terminal connection of gear reduction 3, output shaft 4 are the output terminal of gear reduction 3.What impact block 5 can move back and forth It can be rotated with the rotation of output shaft 4 on output shaft 4 and around own axes, before what working shaft 6 can rotate is arranged on housing 1 Side, and the rear end of working shaft 6 is provided with passive impact portion 61.

Specifically, offering axially disposed mounting groove 51 on the periphery wall of impact block 5, it is provided with the mounting groove 51 It can outwards be thrown away under the effect of 5 rotating centrifugal force of impact block and shock is engaged with passive impact portion 61 so that working shaft 6 revolves The active impulse member 52 turned, be additionally provided with impact block 5 can make active impulse member 52 remain with passive impact portion 61 in point From the limit assembly 7 of trend.The axial arranged connecting shaft 53 of vertical impact block 5, active impulse member are provided with mounting groove 51 52 are arranged in mounting groove 51 by what the connecting shaft 53 can rotate.The anterior medial surface of active impulse member 52 is from back to front, upwards It is formed slopely as the first mating surface 521, the medial surface at 52 rear portion of active impulse member is formed with the second mating surface 522, and first matches somebody with somebody The fulcrum 523 for being formed to offset with the bottom surface of mounting groove 51 is seamlessly transitted between conjunction face 521, the second mating surface 522, second matches somebody with somebody Conjunction face 522 is arranged in obtuse angle with the first mating surface 521.Under 5 rotary state of impact block, the front end of active impulse member 52 is around connection Axis 53 is turned out and is engaged shock with passive impact portion 61, and impact block 5 stops operating under state, before active impulse member 52 End, which inwardly rotates around connecting shaft 53 and departs from passive impact portion 61, cancels shock.Limit assembly 7 includes the first spring 71 and compresses Part 72, the mounting hole 54 of vertical axial arrangement is provided with impact block 5, and the openend of the mounting hole 54 is exposed to mounting groove 51 Interior, the first spring 71 is arranged in the mounting hole 54, and the press part 72 in the present embodiment can simultaneously pass through opening for mounting hole 54 for hoodle Mouthful, press part 72 is connected to the end of the first spring 71 and can offset with the second mating surface 522 of active impulse member 52, so that main Dynamic impulse member 52 remains the trend inwardly rotated around connecting shaft 53.In the present embodiment, on the periphery wall of 5 front end of impact block Offer gap slot 55 circumferentially, assemble under completion status, what the passive impact portion 61 of working shaft 6 can rotate is inserted in In the gap slot 55, the front end of active impulse member 52 is stretched under 5 rotary state of impact block in the gap slot 55 to be impacted with passive Portion 61 is in contact.

Impact block 5 in the present embodiment is connected by connecting rod 81 and second spring 82 with output shaft 4.It is specifically, defeated The connecting hole 41 of front and rear perforation is offered on shaft 4, what connecting rod 81 can move back and forth is arranged in the connecting hole 41 simultaneously front end Locked and connected by threaded screw bore through the rear end of connecting hole 41 and impact block 5, second spring 82 is arranged on output shaft 4 and connecting rod Between 81.Formed with to install the extended cavity 42 of second spring 82, the rear end of connecting rod 81 has limit at the rear portion of connecting hole 41 Position block 811, second spring 82 is placed on the periphery of connecting rod 81 and front end and the front end face of extended cavity 42 offset, rear end with it is spacing Block 811 offsets, to prevent connecting rod 81 from departing from output shaft 4.

The front end of impact block 5 has extended to form forward a connecting portion 56, and the rear end of working shaft 6 is provided with to be inserted into for connecting portion 56 Opening 63.The rear end of impact block 5 is offered from the follow-up slot 57 extended forward, and the slot 57 is positioned opposite with two Plane 571,571 rear portion of plane are provided with the front end insertion that can supply output shaft 4 and the resigning to match with the periphery wall of output shaft 4 Groove 572,4 front end of output shaft offers the mating groove 43 extended from front to back, and the side wall of the mating groove 43 is configured to from forward direction The inclined-plane 431 that gradually stretches out afterwards and can coordinate with respective planes 571.Motor speed reaches a certain level, the meeting pair of inclined-plane 431 Impact block 5 produces forward thrust, so that impact block 5 moves forward.

Using the present embodiment electric wrench when, drive motor 2 drives impact block 5 by the output shaft 4 of gear reduction 3 Rotate, and when 2 rotating speed of drive motor reaches a certain level, output shaft 4 promotes impact block 5 to move forward, at this time, impact block 5 The active impulse member 52 of front end is thrown out of and is engaged with the passive impact portion 61 of 6 rear end of working shaft and hit under the action of the centrifugal force Hit, so that larger torsion is provided for electric wrench, when impact block 5 increases to particular value in the load suffered by working shaft 6, impact Block 5 is subject to passive impact portion 61 compressing power and then being moved rearwards backward, active impulse member 52 is taken off with passive 61 phase of impact portion From in cycles, constantly providing big torsion for electric wrench.

Claims (9)

1. a kind of centrifugal big torsion electric wrench, including

Housing (1)；

Drive motor (2), in the housing (1)；

Output shaft (4), is driven in the housing (1) and by drive motor (2) and rotated；

Impact block (5), can move back and forth be arranged on the output shaft (4) on front side of and can be with the rotation of output shaft (4) and around itself Axis rotates；

Working shaft (6), what can be rotated is arranged on front side of the housing (1), and the rear end of the working shaft (6) is provided with passive impact portion (61)；

It is characterized in that：Axially disposed mounting groove (51), the mounting groove are offered on the periphery wall of the impact block (5) (51) it is provided with outwards throw away and be engaged with passive impact portion (61) under the rotating centrifugal force effect of impact block (5) in and hits Hit so that the rotating active impulse member (52) of working shaft (6), active impulse member (52) can be made by being additionally provided with the impact block (5) Remain the limit assembly (7) in separation trend with passive impact portion (61).

2. centrifugal big torsion electric wrench according to claim 1, it is characterised in that：It is provided with the mounting groove (51) The axial arranged connecting shaft (53) of vertical impact block (5), the active impulse member (52) can be rotated by the connecting shaft (53) Be arranged on mounting groove (51) in, under impact block (5) rotary state, the front end of the active impulse member (52) is around connecting shaft (53) it is turned out and shock is engaged with passive impact portion (61), the impact block (5) stops operating under state, the active The front end of impulse member (52), which inwardly rotates around connecting shaft (53) and departs from passive impact portion (61), cancels shock.

3. centrifugal big torsion electric wrench according to claim 2, it is characterised in that：The limit assembly (7) includes First spring (71) and press part (72), the mounting hole (54) of vertical axial arrangement, and the installation are provided with the impact block (5) The openend in hole (54) is exposed in mounting groove (51), and first spring (71) is arranged in the mounting hole (54), described to compress Part (72) is connected to the end of the first spring (71) and offsets with the lower surface at active impulse member (52) rear portion, so as to actively impact Part (52) remains the trend inwardly rotated around connecting shaft (53).

4. centrifugal big torsion electric wrench according to claim 2, it is characterised in that：Outside impact block (5) front end Gap slot (55) circumferentially is offered on perisporium, is assembled under completion status, the passive impact portion of the working shaft (6) (61) what can be rotated is inserted in the gap slot (55), and the front end of the active impulse member (52) is in impact block (5) rotary state Under stretch into the gap slot (55) and be in contact with passive impact portion (61).

5. centrifugal big torsion electric wrench according to claim 1, it is characterised in that：Gear reduction (3) is further included, The drive motor (2) is motor, and the input terminal of the motor is connected with power supply, and the output terminal of the motor subtracts with the gear The input terminal of fast mechanism (3) is connected, and the output shaft (4) is the output terminal of gear reduction (3).

6. centrifugal big torsion electric wrench according to claim 5, it is characterised in that：Further include connecting rod (81) and second Spring (82), the connecting hole (41) of front and rear perforation is offered on the output shaft (4), what the connecting rod (81) can move back and forth It is arranged in the connecting hole (41) and front end to connect through connecting hole (41) and the rear end locking of impact block (5), second bullet Spring (82) is arranged between output shaft (4) and connecting rod (81) and prevents connecting rod (81) from departing from output shaft (4).

7. centrifugal big torsion electric wrench according to claim 6, it is characterised in that：The rear portion shape of the connecting hole (41) Into the extended cavity (42) for having to install second spring (82), the rear end of the connecting rod (81) has limited block (811), described Second spring (82) is placed on the periphery of connecting rod (81) and front end and the front end face of extended cavity (42) offset, rear end and limited block (811) offset.

8. centrifugal big torsion electric wrench according to claim 6, it is characterised in that：Open the rear end of the impact block (5) Equipped with the certainly follow-up slot (57) extended forward, and the slot (57) has two planes (571) positioned opposite, the plane (571) rear portion is provided with the front end insertion that can supply output shaft (4) and the recessing groove (572) to match with the periphery wall of output shaft (4), Output shaft (4) front end offers the mating groove (43) extended from front to back, and the side wall of the mating groove (43) is configured to certainly Gradually stretch out after forward direction and inclined-plane (431) impact block (5) to be promoted forward can be coordinated with respective planes (571).

9. the centrifugal big torsion electric wrench according to any claim in claim 1~8, it is characterised in that：It is described The front end of impact block (5) has extended to form forward a connecting portion (56), corresponding, and the rear end of the working shaft (6) is provided with for connecting The opening (63) of socket part (56) insertion.