TWI703016B - Over-reverse proof ratchet wrench - Google Patents

Abstract

An over-reverse proof ratchet wrench includes a wrench body, a ratchet member, two pawl , a reversing device, a limitation structure, and a seal member. The ratchet body has a head portion having a housing space and a flat outer lateral side. The ratchet member, pawl , and reversing device are disposed in the housing space. The seal member seals the housing space. Therein, the limitation structure is disposed between the reversing device and the pawl , so as to limit the rotation margin of the reversing device during the direction reversing operation of the reversing device. Therefore, the reversing device is prevented from over-reversing or over-switching, so as to ensure the engagement between the ratchet member and the pawl .

Description

Ratchet wrench capable of preventing excessive reversing

The invention relates to a ratchet wrench, in particular to a ratchet wrench capable of preventing excessive reversing.

Please refer to Taiwan Patent No. M518610, which discloses a ratchet wrench structure, which includes a body, a ratchet, two teeth, two elastic elements, a control group and a cover. The ratchet wheel is pivoted in the first cavity of the body, the two teeth are respectively accommodated in the second cavity of the body, and one end of the two elastic elements springs against the wall of the second accommodation, and the other end springs against each A side of the tooth; in addition, the control group includes a control member, a toggle button and a fixed rod. One end of the control member is provided with a second pivot and is pivoted to the first pivot of the body, and the toggle is fitted The control piece is protruded outside the body, and the fixed rod is penetrated through the dial button to be screwed on the control piece, and the end is sleeved on the cover. In this way, the user can operate the toggle button to move to the right or left to control the abutment state of the control member and each tooth, so as to switch the forward and reverse directions of the ratchet wrench.

However, the aforementioned patent has stop surfaces on both sides of the first pivot part of the main body, so that the dial button can rotate between the two stop surfaces, so as to limit the swing of the dial button through the stop surfaces, so that the control member is not Excessive driving of the gears makes the gears swing beyond the expected range, which affects the meshing effect of the gears and the ratchet; however, the area enclosed by the two stop surfaces is extra punched, which increases the cost of the ratchet wrench, and the appearance is also Not beautiful.

In order to solve the above-mentioned problems, the present invention discloses a ratchet wrench capable of preventing excessive reversing, wherein a limit structure is provided between the reversing device and the ratchet block, and the reversing device can be restricted when the reversing device performs the reversing operation. The rotation amplitude is so that the reversing device will not cause excessive commutation or overcutting.

In order to achieve the above objective, an embodiment of the present invention provides a ratchet wrench capable of preventing excessive reversing. The ratchet wrench includes: a wrench body having a head, the head includes an accommodating space and an outer side surface, and the outer side surface is a It has a flat surface and has a through hole connected to the accommodating space; a ratchet piece is rotatably arranged in the accommodating space along a first rotation axis, and the outer periphery of the ratchet piece is provided with a ring tooth; two ratchet blocks are They are respectively pivoted in the accommodating space, and the two ratchet blocks each have a tooth part corresponding to the ring teeth; the reversing device is rotatably arranged in the accommodating space along a second rotation axis parallel to the first rotation axis, The direction device has a control portion and a drive portion connected to the control portion. The control portion is exposed outside the through hole and can swing relative to the outer side surface, so that the drive portion can rotate relative to the accommodating space to control the The ratchet block is engaged with the ratchet piece or relatively disengages the ratchet piece; a limit structure is provided between the driving part and the two ratchet blocks, which can limit the rotation of the driving part when the reversing device performs a reversing operation Amplitude; and a closing member is used to close the accommodating space.

Thereby, the limiting structure of the present invention can limit the rotation range of the reversing device, so that the reversing device will not be over-reversed, and avoid affecting the meshing relationship between the ratchet piece and the ratchet block; therefore, the present invention does not require Any stop structure is provided on the outer side of the wrench body to reduce the processing cost, and at the same time, the outer side of the wrench body can achieve a complete plane shape, which increases the aesthetics.

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 4, the present invention is a first embodiment of a ratchet wrench 100 capable of preventing excessive reversing, which includes a wrench body 10, a ratchet member 20, two ratchet blocks 30, a change The direction device 40, a limiting structure 50 and a closing member 60.

The wrench body 10 includes a head 11 and a gripping portion 12 extending from the head 11. The head 11 has an accommodating space 13 and an outer side surface 14. The accommodating space 13 is open in a direction different from the outer side surface 14 and is closed by a closing member 60. The outer side surface 14 is a flat surface and has a perforation 141 and a through hole 142 is connected to the accommodation space 13. In the embodiment of the present invention, the accommodating space 13 has a first accommodating groove 131 in an arc shape and a second accommodating groove 132 arranged to overlap and communicate with each other, the through hole 141 is connected to the first accommodating groove 131, and the through hole 142 is connected to the Two storage tank 132. In addition, the wall surface of the second receiving groove 132 different from the first receiving groove 131 is provided with two pivoting grooves 133.

The ratchet member 20 is rotated along a first rotation axis L1 and disposed in the first receiving slot 131 of the accommodating space 13. A ring tooth 21 is provided on the outer periphery of the ratchet member 20. In the embodiment of the present invention, the ratcheting member 20 is provided with a socket 22 at one end for connecting the sleeve, and the other end is provided with a release part 23. By pressing the release part 23, the snap ball 221 of the socket 22 can be removed. Into or protruding to be detachably fastened to the sleeve. When the ratchet member 20 is installed in the wrench body 10, the release portion 23 is exposed from the perforation 141 to expose the outer side surface 14, and the socket 22 is exposed by the closing member 60. Further, the closing member 60 has a through hole 61 for the socket 22 to pass through.

The ratchet blocks 30 are pivotally disposed in the second receiving grooves 132 of the accommodating space 13, and each ratchet block 30 has a pivot portion 31 and a tooth portion 32, and the tooth portion 32 corresponds to the ring The tooth 21 and the pivot portion 31 are different from the tooth portion 32 and are pivoted in the pivot groove 133 so that the ratchet block 30 can generate a swinging movement in the second receiving groove 132. In addition, each ratchet block 30 has an inner side 33.

The reversing device 40 rotates along a second rotation axis L2 parallel to the first rotation axis L1 and is disposed in the second receiving slot 132 of the accommodating space 13. The reversing device 40 has a control portion 41 and a drive portion 42 connected to the control portion 41. The control portion 41 can be operatively exposed outside the through hole 142 and can swing relative to the outer side surface 14, so that the drive portion 42 can The rotation relative to the accommodating space 13 is used to control the ratchet block 30 to engage with the ratchet element 20 or relatively disengage the ratchet element 20. In this embodiment, the driving portion 42 is generally triangular in shape and is opposed to the inner side 33 of the ratchet block 30. The outer periphery of the driving portion 42 includes a pushing surface 421 and two connecting surfaces 422. The connecting surface 422 is connected to the pushing surface. On both sides of the supporting surface 421, during the reversing operation, the driving portion 42 presses the supporting surface 421 against one of the ratchet blocks 30, so that the ratchet block 30 is disengaged from the ratchet member 20, and one of the connecting surfaces 422 It is adjacent to the other ratchet block 30, and the tooth portion 32 of the ratchet block 30 engages with the ring teeth 21 of the ratchet 20, so that the ratchet 20 can only rotate in one direction.

The limiting structure 50 is arranged between the driving portion 42 and the two ratchet blocks 30, and can limit the rotation range of the driving portion 42 when the reversing device 40 performs a reversing operation. In this embodiment, the limiting structure 50 includes a first stopping portion 51 and a second stopping portion 52, the driving portion 42 has a first stopping portion 51, and the ratchet block 30 has a second stopping portion 52. When the direction is changed, the first stop portion 51 can have a stop relationship with the second stop portion 52. In this embodiment, the first stopper 51 is provided between the pushing surface 421 and the connecting surface 422, and the second stopper 52 is two and protrudes from the inner side 33 of the ratchet block 30.

Wherein, two second stop portions 52 are provided on the inner sides 33 of the two ratchet blocks 30, and the length of each second stop portion 52 on the inner side 33 is less than half of the length of the inner side 33 and is close to The tooth portion 32 enables the second stop portion 52 to have a stop relationship with the first stop portion 51 when changing directions. The second stopper 52 and the ratchet block 30 are integrally formed. In other embodiments, the second stopper 52 may also be locked or combined with the ratchet block 30.

As shown in FIG. 4, it is a schematic diagram of the state of the reversing device 40 in the first embodiment of the present invention when reversing. When the manipulation portion 41 of the reversing device 40 is turned to the right in the figure, the ratchet block 30 on the right is pressed by the pushing surface 421 of the driving portion 42 to cause the tooth portion 32 to disengage from the ratchet 20 The ratchet block 30 on the left is adjacent to the connecting surface 422 on the left side of the driving part 42 so that the ratchet member 20 can only rotate counterclockwise. Wherein, the two second stop portions 52 of the limiting structure 50 are respectively protruded on the inner side 33 of the ratchet block 30 and close to the tooth portion 32, so that when the reversing device 40 is reversing operation, the first The stop part 51 stops at the second stop part 52 and limits the rotation range of the driving part 42, so that the reversing device 40 will not be over-reversed, and avoid affecting the meshing of the ratchet member 20 and the ratchet block 30 Relationship; thereby, the reversing device 40 and the ratchet block 30 are positioned under the stop, so there is no need to provide any stop structure on the outside of the wrench body 10, so the outer side 14 of the wrench body 10 can reach a complete plane Shape, reduce processing cost and increase aesthetics.

In addition, the present invention further includes two elastic bodies 70, which are compression springs. The elastic body 70 abuts against the two ratchet blocks 30 and the inner wall of the second receiving groove 132 of the accommodating space 13 respectively to provide elastic force to the ratchet block 30.

As shown in FIG. 5, it is a schematic diagram of the state of the second embodiment of the present invention. In the second embodiment, the same component symbols as those in the first embodiment represent the same components, structures, and functions, so they will not be repeated. In this embodiment, the first stop portion 51 of the limiting structure 50 is protruded from the pushing surface 421 of the driving portion 42 of the reversing device 40, the limiting structure 50 has a recess 53 in the ratchet block 30, and the second The stop portion 52 is provided at one end of the recess 53 to enable the first stop portion 51 and the second stop portion 52 to have a stop relationship when changing directions. Among them, the first stop portion 51 and the driving portion 42 are integrally formed. Thereby, in this embodiment, when the reversing device 40 is reversing operation, the first stop portion 51 is stopped at the second stop portion 52 and the rotation range of the driving portion 42 is restricted, so that the reversing device 40 does not Excessive commutation occurs to ensure the meshing relationship between the ratchet member 20 and the ratchet block 30.

Although the present invention is described in a preferred embodiment, those skilled in the art can make various changes in various forms 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. Any modification or change that does not violate the spirit of the present invention falls within the scope of the patent application of the present invention.

100: Ratchet wrench

11: head

13: accommodation space

132: second container

14: Outer side

142: Through hole

21: Ring tooth

221: card beads

30: ratchet block

32: Teeth

40: Reversing device

42: Drive

422: connection surface

51: The first stop

53: sunken

61: Through hole

L1: the first axis of rotation

10: Wrench body

12: Grip

131: first container

133: pivot slot

141: Piercing

20: ratchet

22: Socket

23: release part

31: Pivot

33: inner side

41: Control Department

421: Push to Face

50: limit structure

52: second stop

60: closure

70: elastomer

L2: second axis of rotation

[Fig. 1] is the first embodiment of the ratchet wrench capable of preventing excessive reversing of the present invention, showing the appearance of the ratchet wrench. [Figure 2] is the first embodiment of the ratchet wrench capable of preventing excessive reversing of the present invention, showing the structure exploded view of the ratchet wrench. [Figure 3] is a schematic diagram of the ratchet block of the first embodiment of the ratchet wrench capable of preventing excessive reversing of the present invention. [Figure 4] The reversing device of the first embodiment of the present invention is switched to the right position, showing that the ratchet block on the left is engaged with the ratchet, and the reversing device and the ratchet block form a stop and restrict the reversing device The amplitude of rotation. [Figure 5] is the second embodiment of the present invention, showing that the reversing device is switched to the right position, the ratchet block on the left is engaged with the ratchet, and the reversing device and the ratchet block form a stop and restrict the reversing device The amplitude of rotation.

10: Wrench body

11: head

12: Grip

13: accommodation space

131: first container

132: second container

133: pivot slot

20: ratchet

21: Ring tooth

22: Socket

221: card beads

30: ratchet block

31: Pivot

32: Teeth

33: inner side

40: Reversing device

41: Control Department

42: Drive

421: Push to Face

422: connection surface

51: The first stop

52: second stop

50: limit structure

70: elastomer

L1: the first axis of rotation

L2: second axis of rotation

Claims (6)

A ratchet wrench capable of preventing excessive reversing, comprising: a wrench body with a head, the head including an accommodating space and an outer side surface, the outer side surface is a flat surface and has a through hole connected to the A accommodating space; a ratcheting piece is rotatably arranged in the accommodating space along a first rotation axis, and the outer periphery of the ratcheting piece is provided with a ring tooth; two ratcheting blocks are respectively pivoted on the The two ratchet blocks each have a tooth portion corresponding to the ring tooth, and the ratchet block has an inner side; a reversing device is along a line parallel to the first rotation axis The second rotation axis is rotatably arranged in the accommodating space. The reversing device has a control portion and a driving portion connected to the control portion. The control portion is exposed outside the through hole and can generate a swing relative to the outer side surface. The driving part can rotate relative to the accommodating space, so as to control the ratchet block to engage with the ratchet or relatively disengage the ratchet, wherein the outer periphery of the driving part includes a Pushing surface and two connecting surfaces; a limit structure, which is arranged between the driving part and the two ratchet blocks, can limit the rotation range of the driving part when the reversing device performs a reversing operation, wherein, The limiting structure includes a first stopping portion and a second stopping portion, the driving portion has the first stopping portion, and the first stopping portion is provided on the pushing surface and the Between the connecting surfaces, the ratchet block has the second stopper, and there are two second stoppers protruding from the inner side. When changing direction, The first stopper portion can have a stopper relationship with the second stopper portion; and a closing element is used to seal the accommodating space. The ratchet wrench capable of preventing excessive reversing as described in claim 1, wherein the second stopper and the ratchet block are integrally formed. The ratchet wrench capable of preventing excessive reversing as described in claim 2, wherein the length of the second stopper on the inner side is less than half of the length of the inner side and is close to The teeth. The ratchet wrench capable of preventing excessive reversing as described in claim 2 or 3 further includes two elastic bodies. The accommodating space includes a first receiving groove and a second receiving groove arranged in communication with each other. The first rotation axis is rotatably disposed in the first cavity, the reversing device is rotatably disposed in the second cavity along the second rotation axis, and the two elastic bodies respectively abut against the two ratchet blocks and the second cavity. The inner wall of the trough. The ratchet wrench capable of preventing excessive reversal as described in claim 4, wherein the first pocket and the second pocket are arc-shaped and overlapped and communicated, and the second pocket is different from the first pocket Two pivotal grooves are provided on the wall surface of the, for the two ratchet blocks to be pivoted on the end edges of the teeth. According to claim 5, the ratchet wrench capable of preventing excessive reversing, wherein the ratcheting member has a socket exposing the closing member; the closing member has a through hole for the socket to pass through.

Images