TWI724902B - Ratchet wrench with electric assistance - Google Patents

Abstract

A ratchet wrench with electric assistance includes a wrench body, a ratchet device, a pawl device, and a switch device. The switch device is configured for selectively engaging the pawl device with the ratchet device, so that the ratchet wrench is operated in a clockwise or counterclockwise direction. During the directional switching process, the switch device selectively engages the first gear and the second gear with the transmission gear of the power device, such that the power device transmits the power to the ratchet device for controlling the clockwise or counterclockwise rotation of the ratchet device, achieving the ratchet wrench with an electric assistance function.

Description

Ratchet wrench with electric assist

The invention relates to a ratchet wrench, in particular to a ratchet wrench with electric assist.

Press, the common ratchet wrench can use the switch to control the clockwise or counterclockwise turning operation of the wrench, so as to be suitable for small spaces or specific work areas.

However, the conventional ratchet wrench uses a manual method to turn the fastener, but before the fastener is locked, due to the light load state, it may happen that the fastener rotates synchronously with the ratchet wrench and cannot be locked into the fixed place. , And cause work inconvenience.

In order to solve the above-mentioned problems, the present invention discloses a ratchet wrench with electric assist, which has the effect of electric assist in the clockwise and counterclockwise processes, such as when under a light load state, to facilitate screw operation.

To achieve the above objective, an embodiment of the present invention provides a ratchet wrench with electric assist, which includes a wrench body, a ratchet device, a ratchet device, a power device, a gear device, and a switching device. The wrench body has a grip end and a head end, the head end has a accommodating groove; the ratchet device is rotatably arranged in the accommodating groove along a first axis, the ratchet device has a ring tooth; the ratchet device is arranged in the accommodating groove, and Selectively mesh with the ring teeth; the power device is arranged on the wrench body, the power device has a transmission shaft that is driven to rotate by electric power, the transmission shaft is provided with a transmission gear along a second axis direction, the second axis is perpendicular to the first axis; the gear device It is arranged in the accommodating groove along a third axis and is displaced relative to the wrench body between a first position and a second position. The third axis is parallel to the first axis. The gear device has a first gear, a second gear, and An actuating shaft penetrating the first gear and the second gear, the actuating shaft can drive the first gear and the second gear to selectively mesh with the transmission gear to transmit power to the ring teeth; the switching device is rotatably arranged on the wrench body and interacts with The actuating shaft is connected and can drive the actuating shaft to move relative to the wrench body along the third axis. When in the first position, the first gear disengages from the transmission gear, and the second gear meshes with the transmission gear, so that the transmission gear drives the ring teeth to rotate through the second gear , So that the ratchet device can rotate in a clockwise direction. When in the second position, the second gear is separated from the transmission gear, and the first gear meshes with the transmission gear, so that the transmission gear drives the ring teeth to rotate through the first gear, so that the ratchet device can Turn in the counterclockwise direction.

As a result, the ratchet wrench of the present invention has manual and electric driving functions, and has a large torque to drive the fastener during manual operation. When the fastener is under light load, the electric mode can be used to drive the ratchet device by electric power. And drive the fasteners to perform screwing operations.

The exemplary embodiments of the present invention are described in detail below with reference to the drawings, and are not intended to limit the technical principles of the present invention to specific disclosed embodiments, and the scope of the present invention is only limited by the scope of the patent application, covering alternatives, modifications and Equivalent.

Please refer to Figures 1 to 11, the present invention is an electrically assisted ratchet wrench 100, 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 accommodating groove 13. Among them, in the embodiment of the present invention, the wrench body 10 includes a rod body 14 and a cover body 15, the rod body 14 and the cover body 15 are combined with each other so that the aforementioned parts are arranged between the two. The accommodating groove 13 is disposed between the rod body 14 and the cover 15. The accommodating groove 13 includes a first groove 131 and a second groove 132 that partially overlap and communicate with each other. The two ends of the first groove 131 are respectively connected with a first groove 131 and a second groove 132. A first through hole 141 and a second through hole 151 are provided. The first through hole 141 is provided on the rod body 14, and the second through hole 151 is provided on the cover body 15. In addition, the rod body 14 is provided with a long groove 142 along the length direction to communicate with the accommodating groove 13. The rod body 14 is provided with a mounting hole 16 on one side of the first through hole 141 to communicate with the second groove 132, and the grip end 11 has a开关孔17。 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 outer periphery of the ratchet device 20 has a ring tooth 21. In the embodiment of the present invention, the ratchet device 20 is provided with a fixing portion 22 extending out of the second through hole 151 at one end. The fixing portion 22 is a square head for connecting a sleeve. The sleeve is used for connecting a fastener, and the ratchet The other end of the device 20 exposes the first through hole 141.

The ratchet device 30 is disposed in the second groove 132 of the accommodating groove 13 and selectively engages 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 block 31 and the second ratchet block 32 are pivoted together in the second slot 132, and each spring 33 abuts against the first ratchet block 31, the second ratchet block 32, and the second slot 132, respectively. The inner wall makes the first ratchet block 31 and the second ratchet block 32 face the ring teeth 21 normally.

The power device 40 is disposed on the wrench body 10 and located between the rod body 14 and the cover body 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 groove 142. The transmission shaft 41 is provided with a transmission gear 42 along a second axis L2 direction and faces the second groove 132. The transmission gear 42 is a bevel gear, and the second axis L2 is perpendicular to the first axis L1. The motor 43 is connected to the transmission shaft 41 in a direction different from the direction of the transmission gear 42. In another embodiment, the motor 43 and the transmission shaft 41 are power connected by a coupling 46. The switch 44 is disposed at the grip end 11 and protrudes from the switch hole 17, the battery 45 is disposed behind the motor 43, and the battery 45 is electrically connected to the motor 43 and the switch 44. In this way, the switch 44 is operated to start the motor 43, so that the transmission shaft 41 is driven to rotate by electric power, and the transmission gear 42 is rotated. In addition, in another embodiment, two support members 47 are further included, which are respectively provided at both ends of the long groove 142 to support the transmission shaft 41.

The gear device 50 is disposed in the second groove 132 of the accommodating groove 13 along a third axis L3, and is displaced relative to the wrench body 10 between a first position and a second position. The axis L1 is parallel, 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. In the embodiment of the present invention, it further includes a pushing member 54 and a transmitting member 55. Please refer to FIG. 3 and FIG. 5, the actuating shaft 53 has a connecting end 531, an abutting end 532 and a locking portion 533. 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 groove 18 and is supported by an elastic member 56. The cross-section of the spring groove 18 and the abutting end 532 is non-circular so that they will not rotate relative to each other. The locking portion 533 is non-circular, and the pushing member 54 has a non-circular locking hole 54a that is adapted to the locking portion 533 so that the two will not rotate relative to each other. In addition, the pushing member 54 is arranged on the side of the first gear 51 away from the second gear 52, that is, the first gear 51 is located between the pushing member 54 and the second gear 52, and the transmitting member 55 is sleeved on the actuating shaft 53 It is located between the first gear 51 and the second gear 52. As the moving shaft 53 is displaced, the operating shaft 53 can drive the first gear 51 and the second gear 52 to selectively mesh with the transmission gear 42 to transmit power to the ring teeth 21. In the embodiment of the present invention, the first gear 51 has a first helical tooth 511 and a first outer ring tooth 512, and the second gear 52 has a second helical tooth 521 and a second outer ring tooth 522.

The top surface of the pushing member 54 has a first joining portion 541, a second joining portion 542, and an inclined surface 543 connected between the first joining portion 541 and the second joining portion 542. In the embodiment of the present invention, there are two first coupling portions 541 and are convex, the second coupling portions 542 are two and concave, and there are two inclined surfaces 543, and the three are formed around the third axis L3. Annular arrangement, as shown in Figure 4 and Figure 5.

The switching device 60 is rotatably arranged on the wrench body 10 and connected to the connecting end 531 of the actuating shaft 53. The switching device 60 can switch between the forward rotation position and the reverse rotation position, so that the ratchet wrench 100 can be rotated clockwise or counterclockwise. Operation. The switching device 60 can drive the actuating shaft 53 to move relative to the wrench body 10 along the third axis L3. The elastic member 56 is arranged between the wrench body 10 and the actuating shaft 53 so that the pushing member 54 has a normal state toward the switching device 60. As shown in FIG. 6, when in the first position, the first gear 51 is disengaged from the transmission gear 42, the second gear 52 is engaged with the transmission gear 42, and the second helical tooth 521 is engaged with the transmission gear 42, and the second outer ring tooth 522 is engaged In the ring teeth 21, so that the transmission gear 42 drives the ring teeth 21 to rotate via the second gear 52, so that the ratchet device 20 can rotate counterclockwise as shown in FIG. 8; as shown in FIG. 9, when in the second position , The second gear 52 is separated from the transmission gear 42, the first gear 51 is meshed with the transmission gear 42, and the first helical tooth 511 is meshed with the transmission gear 42, the first outer ring tooth 512 is meshed with the ring tooth 21, so that the transmission gear 42 passes through the first The gear 51 drives the ring teeth 21 to rotate, so that the ratchet device 20 can rotate in a clockwise direction as shown in FIG. 11.

In the embodiment of the present invention, as shown in FIGS. 2, 4, and 5, the switching device 60 is rotatably disposed in the mounting hole 16, and the mounting hole 16 is coaxial with the third axis L3. The switching device 60 has a stop plate 60a, and the stop plate 60a is located inside the mounting hole 16 to form a stop so that the switching device 60 will not fall out. The bottom surface of the stop plate 60a is provided with a direction control portion 61. The periphery of the direction control portion 61 includes a pushing surface 611 and two side surfaces 612. The pushing surface 611 is selectively supported by the first ratchet block 31 or the second ratchet block 32. Make the first ratchet block 31 or the second ratchet block 32 not mesh with the ring teeth 21, as shown in FIGS. 8 and 11. In addition, the switching device 60 has an operating portion 62 that extends from the side of the stop plate 60a, and the center of the steering portion 61 has a connecting hole 63 for the connecting end 531 of the actuating shaft 53 to pass through and connect.

The pushing member 54 is fastened between the actuating shaft 53 and the switching device 60, so that the pushing member 54 can be displaced with the reversing and rotating of the switching device 60. In the first position as shown in FIG. 6, the second gear 52 meshes with the transmission gear 42. When the first position is changed to the second position, the pusher 54 prompts the actuating shaft 53 to link the first gear 51 toward the transmission gear 42. For meshing, the transmission member 55 is pushed by the first gear 51 and pushes the second gear 52 away from the transmission gear 42 so that the second gear 52 is disengaged from the transmission gear 42 without meshing, as shown in FIG. 9.

Further, as shown in FIGS. 3 to 6, the front side of the direction control portion 61 of the switching device 60 has a first coupling portion 541, a second coupling portion 542, and an inclined portion 543 of the pusher 54 that engage with each other in a concave and convex shape. The connecting portion 64, the second connecting portion 65 and the inclined surface 66. The first coupling portion 64 of the direction control portion 61 has two and is convex, the second coupling portion 65 is two and is concave, the inclined surface 66 has two, and the three are ring-shaped around the third axis L3 Arrange settings. Wherein, in the first position, the first coupling portion 64 of the switching device 60 is coupled to the second coupling portion 542 of the pushing member 54, and the second coupling portion 65 of the switching device 60 is coupled to the first coupling portion of the pushing member 54 541, and the inclined surfaces 66 and 543 of the two abut each other, as shown in FIG. 7; when the first position is changed to the second position, the first coupling portion 64 of the switching device 60 is along the inclined surface of the pusher 54 543 is displaced to the first coupling portion 541 of the pushing member 54 as shown in FIG. 10 to promote the pushing member 54 to produce a displacement action on the third axis L3, so as to drive the first gear 51 to mesh with the transmission gear 42 and the first gear. The purpose of separating the two gears 52 from the transmission gear 42 is shown in FIG. 6.

Please refer to Figure 8 and in conjunction with Figures 6 and 7, the switching device 60 can be switched to the reverse rotation position, so that the pushing surface 611 of the control portion 61 pushes the first ratchet block 31 apart so that it does not engage with the ring teeth 21 is engaged, and the second ratchet block 32 is engaged with the ring teeth 21. In this way, the ratchet device 20 can be rotated counterclockwise, and the wrench can be operated in a clockwise direction. At this time, as shown in Figures 6 and 7, the system is in the first position. A position, that is, the switching device 60 and the pusher 54 are in a concave-convex engagement state, so that the first gear 51 does not mesh with the transmission gear 42, and the second gear 52 meshes between the transmission gear 42 and the ring teeth 21, so that the transmission gear 42 passes through The second gear 52 drives the ring teeth 21, so that the ratchet device 20 is rotated counterclockwise by the power transmitted by the transmission shaft 41.

Please refer to Figure 11 and in conjunction with Figures 9 and 10, the switching device 60 can be switched to the forward rotation position, so that the pushing surface 611 of the control portion 61 pushes the second ratchet block 32 away, so that it does not engage with the ring teeth 21 is engaged, and the first ratchet block 31 is engaged with the ring teeth 21. In this way, the ratchet device 20 can be rotated clockwise, and the wrench can be operated in reverse. At this time, as shown in Figures 9 and 10, the system is in the first position. The second position, that is, due to the rotating operation of the switching device 60, the first coupling portion 64 of the switching device 60 is displaced along the slope portion 543 of the pushing member 54 to the first coupling portion 541 of the pushing member 54 so as to push the pushing member 54 Move toward the cover 15 on the third axis L3 to allow the first gear 51 to move toward the transmission gear 42 to mesh with it, and at the same time push the transmission member 55 to disengage the second gear 52 from the transmission gear 42, so that the transmission gear 42 passes through the first The gear 51 drives the ring teeth 21, so that the ratchet device 20 is rotated clockwise by the power transmitted by the transmission shaft 41.

Thereby, the first axis L1 of the present invention is the rotation axis of the driving sleeve, so that when operating with high torque, the worker can directly use the first axis L1 as the rotation axis to turn the wrench body 10 forward or backward. The operation of rotating the sleeve; when the fastener is in a light load state, if the fastener is operated with a large torque at this time, the fastener will rotate synchronously with the ratchet wrench 100 and cannot be operated. Therefore, the staff can use the electric motor of the present invention Mode, so that the ratchet device 20 is driven by electric power to drive the fasteners to perform screwing operations.

Although the present invention is described in a preferred embodiment, those skilled in the art can make various changes without departing from the spirit and scope of the present invention. The above-mentioned embodiments are only used to illustrate the present invention, and are not used to limit the scope of the present invention. All modifications or changes made without violating the spirit of the present invention belong to the scope of the patent application of the present invention.

100: Ratchet wrench 10: Wrench body 11: Grip end 12: head end 13: accommodating slot 131: first slot 132: second slot 14: Rod body 141: First Piercing 142: Long Groove 15: Lid 151: Second Piercing 16: mounting hole 17: switch hole 18: spring groove 20: Ratchet device 21: Ring tooth 22: Cage part 30: Ratchet device 31: The first ratchet block 32: second ratchet block 33: Spring 40: Power Plant 41: drive shaft 42: Transmission gear 43: Motor 44: switch 45: battery 46: Coupling 47: Support 50: Gear device 51: The first gear 511: first oblique tooth 512: First outer ring tooth 52: second gear 521: second oblique tooth 522: second outer ring tooth 53: Actuating shaft 531: link end 532: Conflict 533: Card Fixing Department 54: pusher 541: first joint 542: second joint 543: oblique face 55: Passing Pieces 56: Elastic 60: Switching device 60a: stop plate 61: Control Department 611: push surface 612: side 62: Operation Department 63: connecting hole 64: The first joint 65: second joint 66: oblique face L1: first axis L L2: second axis L L3: third axis L 54a: card hole

[Figure 1] is a schematic diagram of the appearance of the ratchet wrench with electric assist of the present invention. [Figure 2] is an exploded view of the structure of the ratchet wrench with electric assist of the present invention. [Figure 3] is a schematic diagram of the structure of the switching device of the ratchet wrench with electric assist of the present invention. [Figure 4] is a schematic diagram of the structure of the gear device of the ratchet wrench with electric assist of the present invention. [Fig. 5] is a schematic cross-sectional view taken along the line 5-5 of Fig. 1 of the present invention. [Figure 6] is a partial cross-sectional schematic diagram of the ratchet wrench with electric assist of the present invention, showing that the gear device is in the first position, and the second gear is meshed with the transmission gear. [Fig. 7] is a schematic diagram of the combined state of the switching device and the pushing member of the present invention. When shown in the first position, the switching device and the pushing member are in a concave-convex mating state. [Figure 8] is a schematic cross-sectional view of the ratchet wrench with electric assist of the present invention from another perspective, showing that the ratchet wrench can be operated in a counterclockwise direction. [Figure 9] is a partial cross-sectional schematic diagram of the ratchet wrench with electric assist of the present invention, showing that the gear device is in the second position, and the first gear is meshed with the transmission gear. [Figure 10] is a schematic diagram of the combined state of the switching device and the pusher of the present invention. When shown in the second position, the first coupling part of the switching device abuts against the first coupling of the pushing element. [Figure 11] is a schematic cross-sectional view of the ratchet wrench with electric assist of the present invention from another perspective, showing that the ratchet wrench can be operated in a clockwise direction.

10: Wrench body

13: accommodating slot

14: Rod body

141: First Piercing

15: Lid

151: Second Piercing

16: mounting hole

17: switch hole

18: spring groove

20: Ratchet device

21: Ring tooth

22: Cage part

30: Ratchet device

31: The first ratchet block

32: second ratchet block

33: Spring

40: Power Plant

41: drive shaft

42: Transmission gear

43: Motor

44: switch

45: battery

46: Coupling

47: Support

50: Gear device

51: The first gear

52: second gear

53: Actuating shaft

54: pusher

55: Passing Pieces

56: Elastic

60: Switching device

61: Control Department

62: Operation Department

L1: first axis

L3: third axis

Claims (10)

A ratchet wrench with electric assistance, comprising: a wrench body with a handle end and a head end, the head end has a containing groove; a ratchet device, which is rotatably arranged in the container along a first axis A groove, the ratchet device has a ring tooth; a ratchet device is arranged in the accommodating groove and selectively meshed with the ring tooth; a power device is arranged on the wrench body, the power device has a transmission The shaft is driven by electric power to rotate, the transmission shaft is provided with a transmission gear along a second axis, the second axis is perpendicular to the first axis; a gear device is arranged along a third axis in the accommodating groove and in a Displacement relative to the wrench body between a first position and a second position, the third axis is parallel to the first axis, and the gear device has a first gear, a second gear, and a penetrating through the first gear and the An actuating shaft of the second gear, the actuating shaft can drive the first gear and the second gear to selectively mesh with the transmission gear to transmit power to the ring teeth; and a switching device that is rotatably arranged on the wrench The main body is connected to the actuating shaft and can drive the actuating shaft to move relative to the wrench body along the third axis. When in the first position, the first gear is separated from the transmission gear, and the second gear is engaged with the transmission Gear, the transmission gear drives the ring gear to rotate through the second gear, so that the ratchet device can rotate in a counterclockwise direction. When in the second position, the second gear is separated from the transmission gear, and the first gear The transmission gear is meshed so that the transmission gear drives the ring gear to rotate via the first gear, so that the ratchet device can rotate in a clockwise direction. The electric-assisted ratchet wrench according to claim 1, further comprising a pusher, which is fixedly arranged between the actuating shaft and the switching device, and the pusher can rotate with the switching device. When the first position is in the first position, the second gear meshes with the transmission gear. When the first position is changed to the second position, the pusher causes the actuating shaft to move the first gear toward the transmission gear. It meshes and makes the second gear disengage from the transmission gear. The ratchet wrench with electric assist according to claim 2, wherein a transmission member is provided between the first gear and the second gear, and the transmission member is sleeved on the actuating shaft, and when in the second position, the The transmission member is pushed by the first gear and pushes the second gear away from the transmission gear. The ratchet wrench with electric assist according to claim 2, wherein the bottom surface of the pushing member and the switching device respectively have a first joint part, a second joint part and a first joint part connected to the first joint part and the bottom surface of the switching device. The inclined surface between the coupling portion and the second coupling portion. When in the first position, the first coupling portion of the switching device is engaged with the second coupling portion of the pushing member, and the second coupling portion of the switching device is engaged At the first joining portion of the pushing member and the inclined surfaces of the two abut against each other, when the first position is changed to the second position, the first joining portion of the switching device is along the inclined surface of the pushing member The part is displaced to the first coupling part of the pushing member to promote the pushing member to produce displacement action. The ratchet wrench with electric assist according to claim 4, wherein the first coupling portion, the second coupling portion, and the inclined portion of the pushing member and the switching device are each two , And arranged in an annular arrangement around the third axis. The electric-assisted ratchet wrench according to claim 2 further includes an elastic member disposed between the wrench body and the actuating shaft, so that the pushing member has a normal state toward the switching device. The ratchet wrench with electric assist according to claim 6, wherein the actuating shaft has a connecting end and an oppositely arranged abutting end, and there is a non-circular locking between the connecting end and the abutting end Part, the pushing member has a non-circular hole to fit the locking part. The ratchet wrench with electric assist according to claim 7, wherein the accommodating groove is provided with a spring groove, the connecting end is connected to the switching device, and the elastic member is provided in the spring groove and is supported on the abutting end The switching device has a connecting hole for the connecting end to pass through, and the cross section of the spring groove and the abutting end is non-circular. The ratchet wrench with electric assist according to claim 2, wherein the transmission gear is a bevel gear, the first gear has a first helical tooth and a first outer ring tooth, and the second gear has a second helical tooth Teeth and a second outer ring tooth, in the first position, the second helical tooth meshes with the transmission gear, the second outer ring tooth meshes with the ring tooth; in the second position, the first helical tooth meshes In the transmission gear, the first outer ring tooth meshes with the ring tooth. The ratchet wrench with electric assist according to claim 9, wherein the wrench body has a mounting hole arranged coaxially with the third axis and communicating with the accommodating groove, the switching device is rotatably arranged in the mounting hole, the The ratchet device has a first ratchet block and a second ratchet block pivoted in the accommodating groove and normally faces the ring tooth, the switching device has a direction control portion, and the peripheral edge of the direction control portion includes A pushing surface which selectively supports the first ratchet block or the second ratchet block so that the first ratchet block or the second ratchet block does not engage with the ring teeth; the wrench The main body includes a rod body and a cover body. The accommodating groove and the power device are arranged between the rod body and the cover body. The power device includes a motor, a switch and a battery. The switch protrudes from the handle. The handle is electrically connected to the motor, the motor power is connected to the transmission shaft, and the battery is electrically connected to the motor and the switch.

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