TWI752758B - Resisting structure of ratchet wrench - Google Patents

Abstract

The present invention is a resisting structure of a ratchet wrench, which includes: a body; a ratchet, the outer peripheral ring of the ratchet is provided with a ratchet part, a locking member, the front end of which is provided with a locking tooth part, which can interact with the ratchet part of the ratchet wheel is engaged, and the rear end is provided with a reversing groove, both sides of the reversing groove are respectively provided with an arc surface; a reversing piece is located on the rear side of the latching piece, and the front end of the reversing piece is attached; there is a set of connecting parts opposite to the reversing groove at the rear end of the latching part, both ends of the set of connecting parts are respectively provided with an abutting part opposite to the arc surface; when the reversing part rotates the abutting part close to the arc surface, the abutment part and the arc face part have a gap; when the ratchet is to be retracted in the non-forced direction, the abutment part of the reversing member can limit the distance that the arc face part is pressed down, so that the angle of the ratchet wheel can be confirmed each time, and it is convenient to operate in a narrow range.

Description

Stopping structure of ratchet wrench

The present invention relates to a hand tool, in particular to a stop structure of a ratchet wrench which can ensure the idling angle.

Press, ratchet wrench is a hand tool that is often used to turn screws (bolts or nuts) or sockets, and can rotate screws at a small angle. As shown in FIG. 1 , a conventional ratchet wrench 10 is provided, which comprises a body 11 , a ratchet head 12 , a ratchet block 13 and a reversing member 14 . The body 11 is provided with an accommodating groove. 111. The ratchet head 12, the ratchet block 13 and the reversing member 14 are placed in sequence. The reversing member 14 can be forced to change the direction. The reversing member 14 has a pushing block 141 with an elastic force, the push block 141 can elastically press against the ratchet block 13, and by changing the direction of the reversing member 14, the elastic force position of the push block 141 can be changed, so that the ratchet block 13 can be in different The ratchet head 12 is engaged in position, and the rotation direction of the ratchet head 12 can be changed by changing the engaging position of the ratchet block 13, so that the ratchet head 12 can exert force in one direction, and can form idling in the other direction. In order to make the ratchet head 12 retract in the non-forced direction, there is a gap between the ratchet block 13 and the reversing member 14, so that the ratchet head 12 can press the ratchet block when it is retracted. 13 and the push block 141, so that the ratchet block 13 does not engage the ratchet head 12, and then, the The elastic force generated by the push block 141 will push the ratchet block 13 again, so that the angle of each rotation of the ratchet head 12 will be limited, that is, the angle of one tooth per idle rotation (for example, if the ratchet head 12 has 72 teeth, will go back 5 degrees each time).

In the conventional ratchet wrench, because there is a gap between the ratchet block 13 and the reversing member 14, when the ratchet block 13 is engaged with the ratchet head 12 and exerts force, when the ratchet block 13 is idling in the opposite direction, A large reaction force will be generated, so that the ratchet block 13 will push the push block 141 down, and because of the reaction force, the push block 141 will not have time to rebound, causing the ratchet head 12 to idle. The angle of the ratchet is greater than the angle of one tooth (that is, greater than 5 degrees), and the idling angle can be controlled only after the push block 141 pushes the ratchet block 13 again. Therefore, when the operation is to be performed in a very narrow space, the force application angle is often not as expected, thereby reducing the efficiency, or increasing the number of reciprocating rotations, resulting in trouble in use.

The present invention provides a stop structure of a ratchet wrench, which includes: a main body with an accommodating groove, an arc groove and a connecting groove, the arc groove is set between the connecting groove and the accommodating groove, and the accommodating groove is The groove is communicated with the arc groove and the connecting groove; a ratchet wheel has a working part in the center, which is pivoted in the accommodating groove, the ratchet wheel is provided with a ratchet tooth part on the outer peripheral ring, and the ratchet wheel can be inserted in the accommodating groove It rotates with its working part as the center; a catch piece is accommodated in the arc groove, the front end surface is provided with a catch tooth part to engage with the ratchet tooth part of the ratchet, and the rear end is also provided with a reversing slot, the reversing Two sides of the slot are respectively provided with an arc surface; a reversing piece is installed in the connecting slot and located in the On the rear side of the latching piece, the front end of the reversing piece is provided with a set of connecting parts opposite to the reversing grooves at the rear end of the latching piece; two ends of the set of connecting parts are respectively provided with an abutting part opposite to the arc surface; When the reversing member rotates the abutting portion to approach the arc surface portion, there is a gap between the abutting portion and the arc surface portion; the gap is 1 to 1.2 times the tooth height of the tooth portion; a toggle member has a top holding part and an elastic part; the toggle part is accommodated in the assembling part and elastically contacts the reversing groove with the rear end of the latching part.

In the stop structure of the ratchet wrench provided by the present invention, through the setting of the abutting portion of the reversing member, the distance that the latching member jumps away from the ratchet can be limited, so that the toggle member can instantly provide elastic force, In addition, the angle of each idling rotation of the ratchet can be determined, so that the user can rotate more reliably in a narrow range, and the operation efficiency of the ratchet can be improved.

10: Ratchet wrench

11: Tool body

111: Container

12: Ratchet head

13: Ratchet block

14: Reversing piece

141: push block

20: Ratchet Wrench

30: Ontology

31: Container

32: Arc groove

33: Slots

331: Perforation

332: Ring groove

34: Limit slot

341: Limit side

40: Ratchet

41: Work Department

42: Ratchet

50: Clips

51: Card teeth

52: Arc face

53: Reversing slot

60: Reversing piece

61: Assembly Department

611: Groove

62: Abutment

63: Card block

64: Positioning pieces

65: toggle lever

66: Positioning bumps

70: toggle

71: Top Holder

72: Elastic

80: cover plate

81: Through hole

82: Positioning hole

D: gap

Figure 1 is a three-dimensional external view of a conventional ratchet wrench.

FIG. 2 is a three-dimensional external view of a ratchet wrench according to a preferred embodiment of the present invention.

Figure 3 is an exploded view of the external appearance of the ratchet wrench.

Figure 4 is an exploded view of the other side of the ratchet wrench.

Fig. 5 is the external view of the combination of the limiting groove of the ratchet wrench and the block of the reversing member.

Figure 6 is a schematic diagram of the depressing of the latching member when the ratchet wrench is idling.

FIG. 7 is a schematic diagram of the combination of the ring groove at the bottom of the receiving groove of the ratchet wrench and the positioning protrusion of the reversing member.

Figure 8 is a schematic vertical cross-sectional view of the ratchet wrench.

Please refer to FIGS. 2 to 6 , the ratchet wrench 20 provided by a preferred embodiment of the present invention includes: a main body 30 , a receiving groove 31 , an arc groove 32 and a connecting groove 33 are recessed in sequence. , the arc slot 32 is set between the connecting slot 33 and the accommodating slot 31 , and the accommodating slot 31 is communicated with the arc slot 32 and the connecting slot 33 , and the connecting slot 33 is located away from the end face of the arc slot 32 There is a limiting groove 34, the left and right side walls of the limiting groove 34 respectively form a limiting side portion 341; the bottom of the connecting groove 33 is provided with a through hole 331, the circumference of the through hole 331 is concave with a ring groove 332 coaxially. A ratchet wheel 40 has a working part 41 in the center, which is pivoted in the accommodating groove 31 , and a ratchet tooth part 42 is provided on the outer peripheral ring of the ratchet wheel 40 , and the ratchet wheel 40 can use its working part in the accommodating groove 31 41 is the center of rotation; a latching member 50 is accommodated in the arc groove 32, and its front end surface is provided with a clamping tooth portion 51 to engage with the ratchet tooth portion 42 of the ratchet wheel 40, and the rear end is also provided with an arc surface portion 52, the A reversing slot 53 is recessed in the center of the arc surface portion 52; The assembling portion 61 is opposite to the reversing groove 53 at the rear end of the latching member 50 , the connecting portion 61 is a groove 611 , and an abutting portion 62 is formed on both sides of the assembling portion 61 . Top end face rear side and convex A blocking block 63 is provided, the blocking block 63 is accommodated in the limiting groove 34 and is displaced between the two limiting side portions 341 ; the reversing member 60 is provided with a positioning member 64 on the top end surface, which is It is composed of a spherical body and a spring; the bottom end of the reversing member 60 is provided with a toggle rod 65, and the toggle rod 65 passes through the through hole 331 and is located on the outside of the main body 30. Please refer to Sections 6 and 8 for details. In the figure, the reversing member 60 has a positioning protrusion 66 protruding from the bottom end thereof. The positioning protrusion 66 is disposed in the annular groove 332 so that the rotational position of the reversing member 60 can be restricted.

A toggle member 70 has a top holding portion 71 and an elastic member 72 ; the toggle member 70 is accommodated in the groove 611 of the assembly portion 61 and is connected to the reversing groove at the rear end of the latching member 50 53 elastic contact.

A cover plate 80 is provided with a through hole 81 and two positioning holes 82 therethrough; the cover plate 80 is covered on the top of the main body 30 so that the accommodating groove 31 , the arc groove 32 and the connecting groove 33 can be covered The working part 41 of the ratchet 40 passes through the through hole 81; the positioning member 64 on the top end surface of the reversing member 60 can be positioned in the positioning holes 82, which can produce a positioning effect.

During operation, please refer to FIGS. 5 and 7 , when the ratchet wrench 20 is operated, the direction of the reversing member 60 can be adjusted by turning the turning lever 65 from the outside of the main body 30 , because the locking block 63 will The position is changed in the limiting groove 34, and is limited by the limiting side portion 341, when the blocking block 63 abuts any of the limiting side portions 341, the positioning member 64 will also be located in one of the positioning holes. 82, so that the user can no longer move the toggle lever 65 to complete the switching of the operating direction, because the limiting slot 34 is connected to the accommodating slot 31. The connecting groove 33 and the arc groove 32 are set on the same processing plane, so they can be processed at the same time, which can reduce the process of processing the limit groove 34, and the limit groove 34 will be covered by the cover plate 80. , so it will not be exposed to the outside, and at the same time, the toggle lever 65 will not be affected by any protrusions when operating outside the main body 30, and it is easy to switch directions.

After the reversing member 60 is positioned, the abutting portion 62 will approach the position of the arc surface portion 52 of the locking member 50, and the gap D between the two is about 1~1.2 of the tooth height of the locking tooth portion 51. Therefore, please Referring to FIG. 7 , when the ratchet wheel 40 is about to rotate in the opposite direction to the force application direction, the ratchet wheel 40 will press against the latching member 50 , so that the latching member 50 is displaced toward the direction of the reversing member 60 , and When the toggle member 70 is pressed, the elastic member 72 of the toggle member 70 will be compressed. At this time, because the gap between the abutting portion 62 and the arc surface portion 52 is not large, the latching member 50 is pressed downward. The distance will be limited, and only the height of one tooth can be reached and cannot be pressed down. At this time, when the ratchet portion 42 of the ratchet wheel 40 rotates by one tooth, the toggle member 70 can immediately lock the catch member 50. Pushing in the direction of the ratchet 40, in this way, the idling angle of the ratchet 40 can be ensured, one tooth at a time can be idly rotated, so as to prevent the latching member 50 from being excessively squeezed in the direction of the reversing member 60, and can prevent the idling angle from being too large, affect operational performance.

In the ratchet wrench provided by the present invention, when the ratchet wants to push the latching member to move in the direction of the reversing member, the arc portion of the latching member will be restricted by the abutting portion of the reversing member, so that the latching member will be blocked. The jumping distance of the catch is limited, so that the toggle can instantly generate elastic restoring force to the catch, so that the ratchet can be The angle of the secondary idling can be determined, so that the user can rotate more reliably in a narrow range and improve the operation efficiency.

The above-mentioned embodiments are only intended to illustrate the technical means of the present invention and not to limit it, and all equivalent modifications of the present invention should be regarded as the protection scope of the present invention. The hand tool of the present invention has the first structure in this field, and has the enhancement of practical effect, and the application is filed according to the law.

30: Ontology

31: Container

32: Arc groove

33: Slots

332: Ring groove

34: Limit slot

341: Limit side

40: Ratchet

41: Work Department

42: Ratchet

50: Clips

51: Card teeth

52: Arc face

53: Reversing slot

60: Reversing piece

61: Assembly Department

62: Abutment

63: Card block

64: Positioning pieces

66: Positioning bumps

70: toggle

71: Top Holder

D: gap

Claims (4)

A stop structure of a torque wrench, comprising: a main body with a accommodating groove, an arc groove and a connecting groove, the arc groove is set between the connecting groove and the accommodating groove, and the accommodating groove is connected with the arc groove The groove communicates with the connecting groove; a ratchet wheel has a working part in the center, which is pivoted in the accommodating groove, and a ratchet tooth part is arranged on the outer peripheral ring of the ratchet wheel, and the ratchet wheel can use its working part in the accommodating groove. It rotates in the center; a catch piece is accommodated in the arc groove, its front end surface is provided with a catch tooth part to engage with the ratchet tooth part of the ratchet, and the rear end is also provided with a reversing slot, the two sides of the reversing slot are parallel to each other. An arc surface is respectively provided; a reversing piece is installed in the connecting slot and is located on the rear side of the latching piece, the front end of the reversing piece is provided with a set of connecting parts and a reversing slot at the rear end of the latching piece Opposite; two ends of the assembling portion are respectively provided with an abutting portion opposite to the arc surface portion; when the reversing member rotates the abutting portion to approach the arc surface portion, there is a gap between the abutting portion and the arc surface portion ; The clearance is 1 to 1.2 times the height of the teeth of the latching teeth; a toggle piece has a top holding part and an elastic piece; the toggle piece is accommodated in the assembly part and is connected with the latch The reversing groove at the rear end of the piece is in elastic contact. The stopping structure of a torque wrench according to claim 1, wherein a through hole is formed through the bottom of the receiving groove, and a toggle rod is arranged on the reversing member to pass through the through hole and located outside the body. The stop structure of a torque wrench as claimed in claim 2, wherein a ring groove is concavely formed on the periphery of the perforated ring, and a positioning protrusion is relatively convexly formed on the reversing member, and the positioning protrusion can be located in the ring groove. turn. The stop structure of a torque wrench as claimed in claim 1, further comprising a cover plate, the cover plate is provided with a through hole and two positioning holes; the cover plate is covered on the accommodating groove, the arc groove and the On the connecting groove; the working part of the ratchet passes through the through hole; the end face of the reversing piece is provided with a positioning piece, and the positioning piece can be positioned in the positioning holes.

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