CN212635570U - Electric auxiliary ratchet wrench - Google Patents

Abstract

The utility model discloses an electronic supplementary ratchet spanner, including the spanner body, this internal auto-change over device, gear, power device, ratchet and the ratchet of being equipped with of spanner, thereby power device pass through gear and ratchet transmission and be connected and provide the rotatory power of ratchet, ratchet is connected with the ratchet cooperation and is connected a direction of rotation in order to restrict ratchet, the last card that is used for connecting the fastener portion that is connected with of ratchet, auto-change over device on be equipped with ratchet complex accuse to the portion in order to control ratchet and ratchet's cooperation direction, and still be equipped with on the auto-change over device with gear complex steering portion in order to control gear's power take off direction. The structure is characterized in that the direction of the ratchet wheel device and the direction of the gear device are simultaneously controlled through one switching device, so that the aim of completing reversing operation by one-time operation is fulfilled.

Description

Electric auxiliary ratchet wrench

Technical Field

The utility model relates to a ratchet wrench, especially a ratchet wrench with electronic assistance.

Background

In the prior art, ratchet wrenches are mainly used for providing controllability in the rotation direction, namely locking by ratchets in the output direction, and canceling the ratchet effect in the opposite direction so as to achieve the purpose of idling. Since the wrench has two output directions according to the purpose of use, the ratchet wrench generally has a reversing structure. Further, when it is necessary to provide electric assist, the electric output direction of the ratchet wrench needs to be changed according to the change of the output direction of the ratchet wrench. The existing solution is to adapt the output direction of the ratchet wheel by controlling the output direction of the motor, and the mode has higher requirements on the motor and a circuit, thereby causing higher failure rate. There is also a second solution to achieve output in two directions by two sets of transmission devices, which is bulky and may require two controls to control the ratchet and the transmission device separately, which is cumbersome to use.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides an electronic supplementary ratchet spanner with electronic supplementary output, and compact structure, control is convenient.

In order to achieve the above object, the utility model discloses an electronic supplementary ratchet spanner, including the spanner body, this internal auto-change over device, gear, power device, ratchet and ratchet of being equipped with of spanner, thereby power device pass through gear and ratchet transmission and be connected and provide the rotatory power of ratchet, ratchet is connected with the ratchet cooperation and is connected a direction of rotation with restriction ratchet, the last card that is used for connecting the fastener of being connected with of ratchet, auto-change over device on be equipped with ratchet complex accuse to the portion in order to control ratchet and ratchet's cooperation direction, and still be equipped with on the auto-change over device with gear complex turn to the power take off direction of portion in order to control gear. The structure is characterized in that the direction of the ratchet wheel device and the direction of the gear device are simultaneously controlled through one switching device, so that the aim of completing reversing operation by one-time operation is fulfilled.

The further scheme is as follows:

the ratchet wheel device comprises ring teeth arranged on the outer circumference, the ratchet wheel device is matched with the ring teeth, and the gear device is in transmission fit with the ring teeth; the ring gear is used as the output structure at the tail end, so that the output of the whole ratchet wrench is ensured.

The ratchet device comprises a first ratchet block and a second ratchet block, and only one of the two ratchet blocks can be matched with the ratchet device in any state, so that the change of the locking direction on the ratchet device is realized.

The direction control part on the switching device is a pushing body which comprises a side pushing surface, and the side pushing surface can only be matched and connected with one of the two ratchet blocks on the ratchet device in any state, so that the ratchet blocks are selectively controlled to be matched with the ratchet device; the steering part comprises a first combining part, a second combining part and a first inclined plane part connecting the first combining part and the second combining part, and the first combining part is lower than the second combining part, so that a concave-convex effect is formed between the first combining part and the second combining part; the direction control part is a mechanism for controlling the ratchet device on the switching device, and controls the first ratchet block or the second ratchet block to be in contact with the ring teeth through the change of the relative position between the lateral pushing surface and the two ratchet blocks so as to realize locking. The turning part is a mechanism for controlling the output direction of the motor on the switching device, realizes the change of two states through a first combining part and a second combining part which are arranged in a concave-convex mode, and further is matched with the gear device.

The gear device comprises an actuating shaft, a first gear and a second gear which are arranged on the actuating shaft, and a pushing piece, wherein the pushing piece is matched with the switching device and is provided with a third combining part and a fourth combining part which are matched with the steering part; the gear device comprises two gears, the two gears represent two rotation directions of the two ratchet wrenches respectively, and the two gears are driven to transversely move through the matching change of the pushing piece in the steering part, so that the selective transmission matching of the first gear and the second gear is realized.

The power device comprises a transmission shaft, and the transmission shaft can only transmit power to the ratchet wheel device through one of the first gear and the second gear in any state. When the first gear and the second gear move transversely, the first gear and the second gear are selectively matched with the transmission shaft, and the change of the output direction from the motor transmission to the ratchet wheel device is realized.

The further scheme is as follows: the bottom of the first ratchet block on the ratchet device is a cylindrical pin arranged in a cylindrical groove in the wrench body, so that the first ratchet block can rotate by taking the cylindrical pin as an axis, a spring is arranged between the outer side of the first ratchet block and the inner wall of the wrench body, the inner side of the first ratchet block is connected with the side pushing surface in a matched mode, and the top of the first ratchet block is a ratchet matched with the ratchet device. The one-way locking function of the ratchet block is realized through the arrangement of the spring, the resilience force is provided when the ratchet block is selectively controlled, and the work of the ratchet block is ensured.

The further scheme is as follows: the switching device comprises a baffle disc arranged in a mounting hole of the wrench body and an operating part arranged outside the wrench body on one side of the baffle disc, and the direction control part and the steering part are both arranged in the wrench body on the other side of the baffle disc; the projection surface of the pushing body on the blocking disc is of a fan-shaped structure, the side surface of the pushing body is a side pushing surface, and the projection surface of the steering part on the blocking disc is also of a fan-shaped structure. The combination of the two fan-shaped structures can effectively combine the two control mechanisms on the baffle disc of the switching device, and the size of the switching device is reduced.

The further proposal is that the two steering parts are symmetrically arranged on the baffle disc, and the fan-shaped inner diameter of the pushing body is larger than the fan-shaped outer diameter of the steering parts; a connecting hole is arranged at the circle center of the sector of the steering part, and one end of the actuating shaft is arranged in the connecting hole. The control effect of the steering part can be ensured by the symmetrically arranged steering parts, and the matching stability of the gear device and the switching device can be ensured by the arrangement of the connecting holes, so that the switching effect is ensured.

The further scheme is as follows: the gear device is used as an actuating shaft, an elastic piece is arranged between one end of the actuating shaft and the inner wall of the wrench body, the other end of the actuating shaft is close to the switching device, a pushing piece, a first gear, a transmission piece and a second gear are sequentially sleeved on the actuating shaft from one end close to the switching device, and the pushing piece is connected with a clamping portion on the actuating shaft in a matched mode through a flat key. The actuating shaft is sleeved with a related structure, so that the influence of the rotation of the gear on the actuating shaft can be avoided, and the output efficiency is improved. The transmission piece can ensure the relative position of the two gears and transmit transverse motion between the two gears. The elastic part can ensure that the two gears have the situation close to the switching device and provide the variable reducing force of the switching device. The pushing piece is matched with the clamping part through the flat key, so that the pushing piece is prevented from slipping on the actuating shaft when being acted by the steering part, and the switching effect is guaranteed.

The further scheme is as follows: the first gear and the second gear are both provided with a helical tooth surface, the helical tooth surfaces of the two gears are arranged oppositely, and the transmission shaft is in transmission fit with the first gear or the second gear through a helical gear arranged at the top end of the transmission shaft. The power output in two directions is realized by respectively matching the oppositely arranged helical tooth surfaces with the helical gears of the transmission shaft.

The further scheme is as follows: the first ratchet block and the second ratchet block are symmetrically arranged, the gear device is arranged in a space between the first ratchet block and the second ratchet block, and the pushing body extends into the space between the first ratchet block and the second ratchet block; the transmission shaft extends into a space between the first ratchet block and the second ratchet block from bottom to top.

The further scheme is as follows: the wrench body comprises a rod body and a cover body, the power device is arranged in the wrench body and comprises a motor and a battery, and the output end of the motor is connected with the transmission shaft.

Compared with the prior art, the utility model discloses an electronic supplementary ratchet spanner through reasonable mechanism design, concentrates the conversion of ratchet direction and the conversion of electronic output direction with switching device on, the operation of convenient switching. Meanwhile, the switching device is small in size and can be accommodated in the wrench body, so that the purpose that the large-torque driving and rotating fastener is achieved when the manual operation is performed is finally achieved, and when the fastener is in a light-load state, the electric mode can be utilized, so that the ratchet wheel device is driven by electric power to drive the fastener to perform the screwing operation is achieved.

Drawings

Fig. 1 is an external view of the power-assisted ratchet wrench of the present invention.

Fig. 2 is an exploded view of the power-assisted ratchet wrench of the present invention.

Fig. 3 is a schematic structural view of the switching device of the electric-assisted ratchet wrench of the present invention.

Fig. 4 is a schematic structural view of the gear device of the power-assisted ratchet wrench of the present invention.

Fig. 5 is a cross-sectional view taken along line 5-5 of fig. 1 according to the present invention.

Fig. 6 is a schematic partial sectional view of the power-assisted ratchet wrench of the present invention, showing the gear device in the first position and the second gear engaged with the transmission gear.

Fig. 7 is a schematic view of the combination state of the switching device and the pushing member of the present invention, which is shown in the first position, wherein the switching device and the pushing member are in concave-convex fit.

Fig. 8 is a schematic cross-sectional view of another embodiment of the power assisted ratchet wrench of the present invention, showing the ratchet wrench being operable in a counterclockwise direction.

Fig. 9 is a schematic partial cross-sectional view of the power-assisted ratchet wrench of the present invention, showing the gear assembly in the second position with the first gear engaged with the drive gear.

Fig. 10 is a schematic view of the connection state of the switching device and the pushing member of the present invention, showing that when the switching device is in the second position, the first connection portion of the switching device abuts against the first connection portion of the pushing member.

Fig. 11 is a schematic cross-sectional view of another embodiment of the power assisted ratchet wrench of the present invention, showing the ratchet wrench being operable in a clockwise direction.

In the figure:

100 ratchet wrench 10 wrench body

11, a handle end 12 and a head end

13 accommodating groove 131 first groove

132 second groove 14 rod

141 first through hole 142 elongated slot

15 cover 151 second through hole

16 mounting hole 17 switch hole

18: spring groove 20: ratchet gear

21 ring teeth 22 fastening part

30 ratchet device 31 first ratchet block

311 cylindrical pin

32 second ratchet block 33 spring

40: power device 41: transmission shaft

42 transmission gear 43 motor

44 switch 45 battery

46 coupling member 47 support member

50 gear device 51 first gear

511 a first helical tooth 512 a first external ring tooth

52 second gear 521 second helical teeth

522 second external ring gear 53 actuating shaft

531 connecting end 532 abutting end

533 a locking part 54a pushing piece

541, third combination part 542, fourth combination part

543 second inclined plane part 55, transmission piece

56 elastic piece 60 switching device

60a, a blocking disc 61 and a direction control part

611 pushing body 612 side

62 operating part 63 connecting hole

64 first joining part 65 second joining part

66 first inclined plane portion L1 first axis L

66 first inclined plane portion L1 first axis L

L2 second Axis L L3 third Axis L

54a clamping hole

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Example 1.

Referring to fig. 1 to 11, the present invention relates to a ratchet wrench 100 with electric assist, which includes a wrench body 10, a ratchet device 20, a ratchet device 30, a power device 40, a gear device 50 and a switching device 60.

The wrench body 10 has a handle end 11 and a head end 12, and the head end 12 has a receiving groove 13. The wrench body 10 includes a rod 14 and a cover 15, and the rod 14 and the cover 15 are combined with each other to allow the above components to be disposed therebetween. The accommodating groove 13 is disposed between the rod 14 and the cover 15, the accommodating groove 13 includes a first groove 131 and a second groove 132 partially overlapped and communicated with each other, two ends of the first groove 131 are respectively communicated with a first through hole 141 and a second through hole 151, the first through hole 141 is disposed on the rod 14, and the second through hole 151 is disposed on the cover 15. In addition, the rod 14 has a long slot 142 along the length direction and is communicated with the receiving slot 13, the rod 14 has a mounting hole 16 at one side of the first through hole 141 and is communicated with the second slot 132, and the handle end 11 has a switch hole 17. The accommodating groove 13 is further provided with a spring groove 18, and the spring groove 18 is disposed on the cover 15.

The ratchet device 20 is rotatably disposed in the first groove 131 of the accommodating groove 13 along a first axis L1, and the ratchet device 20 has a ring gear 21 on an outer periphery thereof. In the embodiment of the present invention, the ratchet device 20 has a fastening portion 22 extending out of the second through hole 151 at one end, the fastening portion 22 is a square head for connecting the sleeve, the sleeve is used for connecting the fastening member, and the other end of the ratchet device 20 exposes the first through hole 141.

The ratchet device 30 is disposed in the second groove 132 of the receiving groove 13 and selectively engaged with the ring teeth 21. In the embodiment of the present invention, the ratchet device 30 has a first ratchet block 31, a second ratchet block 32 and two springs 33. The first ratchet piece 31 and the second ratchet piece 32 are pivoted to the second groove 132, and each spring 33 is respectively abutted against the inner walls of the first ratchet piece 31, the second ratchet piece 32 and the second groove 132, so that the first ratchet piece 31 and the second ratchet piece 32 are normally facing the ring gear 21.

The power device 40 is disposed on the wrench body 10 and located between the rod 14 and the cover 15. The power device 40 includes a transmission shaft 41, a transmission gear 42, a motor 43, a switch 44 and a battery 45. The transmission shaft 41 is disposed in the long slot 142, and the transmission shaft 41 is disposed along a second axis L2 and faces the second slot 132, wherein the transmission gear 42 is a helical gear, and the second axis L2 is perpendicular to the first axis L1. The motor 43 and the direction of the transmission gear 42 transmit power through the transmission shaft 41. In another embodiment, the motor 43 is coupled to the transmission shaft 41 by a coupling 46. The switch 44 is arranged at the handle end 11 and is protruded out of the switch hole 17, the battery 45 is arranged behind the motor 43, and the battery 45 is electrically connected with the motor 43 and the switch 44. Thus, the switch 44 is operated to start the motor 43, so as to rotate the transmission shaft 41 under the driving of the electric power, and to rotate the transmission gear 42. In addition, in another embodiment, two supporting members 47 are further included, which are respectively disposed at two ends of the long slot 142 for supporting the transmission shaft 41.

The gear device 50 is disposed in the second slot 132 of the accommodating slot 13 along a third axis L3 and is movable between a first position and a second position relative to the wrench body 10, the third axis L3 is parallel to the first axis L1, and the gear device 50 has a first gear 51, a second gear 52 and an actuating shaft 53 extending through the first gear 51 and the second gear 52. Also includes a pushing member 54 and a transmission member 55. Referring to fig. 3 and 5, the actuating shaft 53 has a connecting end 531, an abutting end 532 and a locking portion 533, and the locking portion 533 is disposed between the connecting end 531 and the abutting end 532. The abutting end 532 of the actuating shaft 53 is disposed in the spring slot 18 and is abutted by an elastic member 56, wherein the spring slot 18 and the abutting end 532 have non-circular cross-sections so that they do not rotate relatively. The locking portion 533 is non-circular, and the pushing member 54 has a non-circular locking hole 54a to fit into the locking portion 533 so that the two are not rotated relatively. In addition, the pushing element 54 is disposed on one side of the first gear 51 and away from the second gear 52, that is, the first gear 51 is disposed between the pushing element 54 and the second gear 52, and the transmission element 55 is sleeved on the actuating shaft 53 and disposed between the first gear 51 and the second gear 52. When the actuating shaft 53 is displaced, the actuating shaft 53 can drive the first gear 51 and the second gear 52 to selectively mesh with the transmission gear 42 for transmitting power to the ring gear 21. In the embodiment of the present invention, the first gear 51 has a first helical tooth 511 and a first external ring tooth 512, and the second gear 52 has a second helical tooth 521 and a second external ring tooth 522. The top surface of the pushing member 54 has a third combining portion 541, a fourth combining portion 542, and a second inclined surface portion 543 connected between the third combining portion 541 and the fourth combining portion 542. In the embodiment of the present invention, the third engaging portions 541 are two and convex, the fourth engaging portions 542 are two and concave, and the second inclined portions 543 are two, and the three are annularly arranged around the third axis L3, as shown in fig. 4 and 5.

The switching device 60 is rotatably installed on the wrench body 10 and linked with the connecting end 531 of the actuating shaft 53, and the switching device 60 can switch between the forward rotation position and the reverse rotation position to operate the ratchet wrench 100 clockwise or counterclockwise. The switching device 60 can drive the actuating shaft 53 to displace along the third axis L3 relative to the wrench body 10, and the elastic element 56 is disposed between the wrench body 10 and the actuating shaft 53, so that the pushing element 54 has a normal state facing the switching device 60. When in the first position, as shown in fig. 6, the first gear 51 is disengaged from the transmission gear 42, the second gear 52 is engaged with the transmission gear 42, the second helical tooth 521 is engaged with the transmission gear 42, and the second external ring tooth 522 is engaged with the ring tooth 21, so that the transmission gear 42 drives the ring tooth 21 to rotate via the second gear 52, so that the ratchet device 20 can rotate in the counterclockwise direction as shown in fig. 8; when in the second position, as shown in fig. 9, the second gear 52 is disengaged from the transmission gear 42, the first gear 51 is engaged with the transmission gear 42, the first helical teeth 511 are engaged with the transmission gear 42, and the first external ring teeth 512 are engaged with the ring teeth 21, so that the transmission gear 42 drives the ring teeth 21 to rotate via the first gear 51, so that the ratchet device 20 can rotate in the clockwise direction as shown in fig. 11.

In the embodiment of the present invention, as shown in fig. 2, 4 and 5, the switching device 60 is rotatably disposed in the mounting hole 16, and the mounting hole 16 and the third axis L3 are coaxial. The switching device 60 has a stopper 60a, and the stopper 60a is located inside the mounting hole 16 to form a stopper so that the switching device 60 is not removed. The bottom surface of the retaining disc 60a is provided with a direction control portion 61, the periphery of the direction control portion 61 includes a pushing body 611 and two side surfaces 612, in embodiment 1 of the present invention, the connecting arc surface between the two side surfaces 612 on the pushing body 611 is a main side pushing surface, and the side pushing surface selectively pushes against the first ratchet piece 31 or the second ratchet piece 32, so that the first ratchet piece 31 or the second ratchet piece 32 is not engaged with the ring gear 21, as shown in fig. 8 and 11. In addition, the switching device 60 has an operation portion 62 extending from a side of the block disc 60a, and the center of the direction control portion 61 has a connection hole 63 for the connection end 531 of the operation shaft 53 to pass through.

The pushing member 54 is clamped between the actuating shaft 53 and the switching device 60, so that the pushing member 54 can generate displacement along with the reversing rotation of the switching device 60. When the first position is changed to the second position as shown in fig. 6, the second gear 52 engages with the transmission gear 42, the pushing member 54 urges the actuating shaft 53 to drive the first gear 51 to engage in the direction of the transmission gear 42, and the transmission member 55 is pushed by the first gear 51 to push the second gear 52 away from the transmission gear 42, so that the second gear 52 is disengaged from the transmission gear 42, as shown in fig. 9.

As shown in fig. 3 to 6, the front side of the direction control portion 61 of the switching device 60 includes a first coupling portion 64, a second coupling portion 65, and a first inclined surface portion 66, which are engaged with the third coupling portion 541, the fourth coupling portion 542, and the second inclined surface portion 543 of the pusher 54 in a concave-convex manner. The steering control portion 61 has two convex first coupling portions 64, two concave second coupling portions 65, and two first inclined surface portions 66, which are arranged annularly around the third axis L3. In the first position, the first combining portion 64 of the switching device 60 is engaged with the fourth combining portion 542 of the pushing member 54, the second combining portion 65 of the switching device 60 is engaged with the first combining portion 541 of the pushing member 54, and the first inclined surface portion 66 and the second inclined surface portion 543 of the two are abutted with each other, as shown in fig. 7; when the first position is changed to the second position, the first combining portion 64 of the switching device 60 moves along the second inclined surface portion 543 of the pushing element 54 to the third combining portion 541 of the pushing element 54, as shown in fig. 10, so as to cause the pushing element 54 to move on the third axis L3, thereby achieving the purpose of driving the first gear 51 to engage with the transmission gear 42 and the second gear 52 to disengage from the transmission gear 42, as shown in fig. 6.

Referring to fig. 8 and fig. 6 and 7, the switching device 60 can be switched to the reverse rotation position, so that the pushing body 611 of the direction control portion 61 pushes the first ratchet block 31 open and does not engage with the ring gear 21, the second ratchet block 32 engages with the ring gear 21, and thus the ratchet device 20 can be in the counterclockwise rotation state, so that the wrench can be operated in the forward rotation state, at this time, as shown in fig. 6 and 7, the first position is the first position, that is, the switching device 60 and the pushing member 54 are in the concave-convex engagement state, so that the first gear 51 is not engaged with the transmission gear 42, and the second gear 52 is engaged between the transmission gear 42 and the ring gear 21, so that the transmission gear 42 drives the ring gear 21 through the second gear 52, and the ratchet device 20 is driven by the power transmitted by the transmission shaft 41 to rotate counterclockwise.

Referring to fig. 11 and fig. 9 and 10, the switching device 60 can be switched to the forward rotation position, such that the pushing body 611 of the direction control portion 61 pushes the second ratchet block 32 to be away from the ring gear 21, the first ratchet block 31 is engaged with the ring gear 21, and thus the ratchet device 20 can rotate clockwise, such that the wrench can rotate in the reverse direction, and at this time, as shown in fig. 9 and 10, the second position is shown, i.e. the switching device 60 rotates, such that the first engaging portion 64 of the switching device 60 moves along the inclined surface portion of the pushing member 54 to the third engaging portion 541 of the pushing member 54, and the pushing member 54 is pushed towards the cover 15 along the third axis L3, such that the first gear 51 moves towards the transmission gear 42 to be engaged therewith, and the transmission member 55 is pushed to disengage the second gear 52 from the transmission gear 42, such that the transmission gear 42 drives the ring gear 21 via the first gear 51, the ratchet device 20 is driven by the power transmitted by the transmission shaft 41 to rotate clockwise.

Therefore, the first axis L1 of the present invention is the rotation axis for driving the sleeve, so that when the large torque operation is performed, the worker can directly pull the wrench body 10 forward or backward to pull the sleeve by using the first axis L1 as the rotation axis; and when the fastener is in the light load state, if operate with big torsion this moment, will make the fastener rotate along with ratchet spanner 100 is synchronous, and can't carry out the operation, consequently the staff is usable the utility model discloses an electric mode to ratchet 20 is driven and drives the fastener by power, and carries out the spiral shell operation.

Claims (9)

1. An electric auxiliary ratchet wrench comprises a wrench body, wherein a switching device, a gear device, a power device, a ratchet device and a ratchet device are arranged in the wrench body, and the electric auxiliary ratchet wrench is characterized in that the power device is in transmission connection with the ratchet device through the gear device so as to provide power for rotation of the ratchet device, the ratchet device is in matched connection with the ratchet device so as to limit one rotation direction of the ratchet device, a clamping part used for connecting a fastening piece is connected onto the ratchet device, a direction control part matched with the ratchet device is arranged on the switching device so as to control the matching direction of the ratchet device and the ratchet device, and a direction turning part matched with the gear device is further arranged on the switching device so as to control the power output direction of the gear device.

2. The power-assisted ratchet wrench of claim 1, wherein:

the ratchet wheel device comprises ring teeth arranged on the outer circumference, the ratchet wheel device is matched with the ring teeth, and the gear device is in transmission fit with the ring teeth;

the ratchet device comprises a first ratchet block and a second ratchet block, and only one of the two ratchet blocks can be matched with the ratchet device in any state;

the direction control part on the switching device is a pushing body which comprises a side pushing surface, and the side pushing surface can only be matched and connected with one of the two ratchet blocks on the ratchet device in any state, so that the ratchet blocks are selectively controlled to be matched with the ratchet device; the turning part comprises a first combining part, a second combining part and a first inclined plane part connecting the first combining part and the second combining part, and the first combining part is lower than the second combining part, so that a concave-convex effect is formed between the first combining part and the second combining part,

the gear device comprises an actuating shaft, a first gear and a second gear which are arranged on the actuating shaft, and a pushing piece, wherein the pushing piece is matched with the switching device and is provided with a third combining part and a fourth combining part which are matched with the steering part;

the power device comprises a transmission shaft, and the transmission shaft can only transmit power to the ratchet wheel device through one of the first gear and the second gear in any state.

3. The power-assisted ratchet wrench as claimed in claim 2, wherein the ratchet device includes a first ratchet piece having a bottom portion provided with a cylindrical pin and disposed in a cylindrical groove of the wrench body such that the first ratchet piece can rotate about the cylindrical pin, a spring is disposed between an outer side of the first ratchet piece and an inner wall of the wrench body, an inner side of the first ratchet piece is engaged with the side pushing surface, and a top portion of the first ratchet piece is a ratchet engaged with the ratchet device.

4. The power-assisted ratchet wrench as claimed in claim 2, wherein the switching means includes a stopper plate disposed in the mounting hole of the wrench body, and an operating portion disposed outside the wrench body on one side of the stopper plate, wherein the direction control portion and the direction turning portion are both disposed inside the wrench body on the other side of the stopper plate; the projection surface of the pushing body on the blocking disc is of a fan-shaped structure, the side surface of the pushing body is a side pushing surface, and the projection surface of the steering part on the blocking disc is also of a fan-shaped structure.

5. The power-assisted ratchet wrench of claim 4, wherein the two turning portions are symmetrically disposed on the stopper, and the inner diameter of the sector of the pushing body is larger than the outer diameter of the sector of the turning portions; a connecting hole is arranged at the circle center of the sector of the steering part, and one end of the actuating shaft is arranged in the connecting hole.

6. The power-assisted ratchet wrench as claimed in claim 2, wherein the gear mechanism is an actuating shaft, an elastic member is disposed between one end of the actuating shaft and the inner wall of the wrench body, the other end of the actuating shaft is close to the switching device, the actuating shaft is sleeved with the pushing member, the first gear, the transmission member and the second gear in sequence from the end close to the switching device, and the pushing member is connected with the locking portion of the actuating shaft through a flat key in a matching manner.

7. The power-assisted ratchet wrench of claim 5, wherein the first gear and the second gear each have a beveled tooth surface, and the two shafts are in driving engagement with the first gear or the second gear via a bevel gear disposed at a top end of the shafts.

8. The power-assisted ratchet wrench of claim 2, wherein the first ratchet block and the second ratchet block are symmetrically disposed, the gear device is disposed in a space between the first ratchet block and the second ratchet block, and the pushing body extends into the space between the first ratchet block and the second ratchet block; the transmission shaft extends into a space between the first ratchet block and the second ratchet block from bottom to top.

9. The power-assisted ratchet wrench as claimed in claim 2, wherein the wrench body comprises a rod and a cover, the power unit is disposed in the wrench body and includes a motor and a battery, and an output end of the motor is connected to the transmission shaft.

Images