TWI834385B - Torque and non-torque dual mode switching structure of hand tools - Google Patents

Abstract

A torque and non-torque dual-mode switching structure of a hand tool. The hand tool is a hand tool with adjustable torque. The hand tool is provided with a switching structure. Through the switching structure, the hand tool can be set to a torque mode or a non-torque mode. In the torque mode, when the hand tool operates the screw joint and the tightening degree reaches the preset torque value, the working head of the hand tool can swing at an angle to remind the operator to stop applying force. In the non-torque mode, the working head of the hand tool is fixed and cannot swing. It can be used to tighten fasteners that do not require tightening torque control, and can also be used to loosen fasteners.

Description

Torque and non-torque dual mode switching structure of hand tools

The present invention relates to the field of hand tools, and more specifically, to a dual-mode switching structure between torsion and non-torsion of a wrench.

The torque wrench has the function of setting the torque. When the force applied by the wrench when turning the bolt or nut exceeds the set torque value, a tripping structure in the wrench will cause a tripping action, resulting in vibration and sound. The user will know that the force applied by the wrench has reached the set value. value.

A typical adjustable torque wrench includes a tubular body, one end of which is connected to a working head, and the other end of which is provided with a handle. A torque setting member is provided on the outside of the tubular body. The torque setting member is connected to an axial push rod assembly in the tubular body. The axial push rod assembly is controlled by the torque setting member to perform linear reciprocating displacement, thereby compressing or Loosen a torque adjustment component that is pushed against it, and the torque adjustment component pushes an extension rod that the working head penetrates into the tubular body, thereby adjusting the torque value of the working head. The related structures of torque adjustment and setting can be found in previous patents such as TWM267020 and TWI318917. When the working head operates screws, bolts and other threaded parts, and the tightening degree has reached the preset torque value, the wrench body will produce a swing angle relative to the working head, and a prompt sound will be emitted inside the wrench body, and the operator can stop Keep working hard.

Torque wrenches are usually used for threaded locking parts (such as bolts, screws, nuts, etc.) that require precise control of tightening. However, torque wrenches cannot be used to disassemble threaded locking parts, so it is necessary to Prepare a separate fixed wrench to loosen the screw locking hardware.

In order to solve the problem that the torque wrench cannot be used as a fixed wrench, the present invention proposes a torque and non-torque dual mode switching structure provided on the torque wrench.

Technical features and effects of the present invention:

A torsion and non-torsion dual-mode switching structure of a hand tool. The hand tool is a hand tool with adjustable torque. The first end of an extension rod is integrally connected to a working head of the hand tool, and the extension rod extends into the hand tool. A first end of a tubular body of the tool, a pivot connecting the extension rod and the first end of the tubular body, the diameter of the extension rod being smaller than the inner diameter of the tubular body; the extension rod is provided on the tubular body Under the control of a torque adjustment component, the extension rod can swing in the tubular body around the pivot axis; it is characterized in that: the hand tool is provided with a switching structure, and the switching structure includes:

Two stoppers are respectively provided in the two wall holes of the tubular body. The two stoppers can reciprocally slide in the two wall holes, and the direction of the reciprocating sliding is parallel to the swing direction of the extension rod;

A switching member is sleeved on the outside of the first end of the tubular body and is reciprocally rotatable; the inner wall of the switching member is provided with two limit grooves, and the two ends of the pivot extend into the two limit grooves respectively. in the groove; the limit groove extends an arc length along the reciprocating rotation direction of the switching member; the inner wall of the switching member is provided with two relief grooves, and the positions of the two relief grooves correspond to the two stop blocks; the two relief grooves are along the edges of the two relief grooves. Extending an arc length along the reciprocating rotation direction of the switching member, the relief groove includes a sloped surface;

Rotate the switching member so that the two relief grooves are relative to the two stoppers, the extension rod can swing within the tubular body, and the two stoppers are pushed into the two relief grooves. The hand tool is in torque mode;

Rotate the switching member, the slope surface pushes the stopper, and the two stoppers clamp the extension rod. The extension rod cannot swing within the tubular body, and the hand tool is in a non-torque mode.

10: Tubular body

11:First end

13: Wall hole

14:The first bead groove

15:Second bead groove

16:Torque setting piece

20:Working head

21: handle

30:Switch structure

31:Extension rod

311:Pivot hole

32:Pivot

33:Block

331: Arc concave surface

332: Fillet arc convex surface

34:Switching piece

341:First limit ring

342: Second limit ring

35: Limit hole

36:Limit group

361:Screw

362:Spring

363: Ball

37: Switch mark

371:Indicator

372:Torque mark

373: Non-torque sign

40:Limit slot

41: concession slot

42:stop surface

43: Slope surface

[Fig. 1] One of the three-dimensional appearance of the hand tool of the present invention.

[Figure 2] The second three-dimensional appearance view of the hand tool of the present invention.

[Figure 3] An exploded perspective view of the switching structure of the present invention.

[Fig. 4] A plan view of the switching structure of the present invention in the non-torque mode.

[Fig. 5] is a cross-sectional view of Fig. 4.

[Fig. 6] is a cross-sectional view taken along line VI-VI in Fig. 5.

[Fig. 7] is a cross-sectional view taken along line VII-VII in Fig. 4.

[Fig. 8] A plan view of the switching structure of the present invention in torsion mode.

[Fig. 9] is a cross-sectional view of Fig. 8.

[Fig. 10] is a cross-sectional view taken along line X-X in Fig. 9.

[Fig. 11] is a cross-sectional view taken along line VI-VI in Fig. 9.

[Fig. 12] is a schematic cross-sectional view of the switching structure of the present invention in the torsion mode.

[Fig. 13] is a cross-sectional view taken along line XIII-XIII in Fig. 12.

[Fig. 14] Continuation of Fig. 13 is a schematic diagram describing another actuation state.

In order to facilitate the explanation of the central idea of the present invention expressed in the above summary column, specific embodiments are hereby expressed. Various objects in the embodiments are drawn according to proportions, sizes, deformations or displacements suitable for illustration, rather than according to the proportions of actual components, and are explained first. In the following description, identical and symmetrically arranged components are represented by the same numbers. say below The use of directional terms in the description is based on the direction of view and cannot be interpreted as a restriction on this creation. The terms "first," "second," and "third" are used to describe elements only and are not to be construed as indicating or implying relative importance or order.

As shown in Figures 1 and 2, the present invention is based on a hand tool with adjustable torque, and is provided with a torsion and non-torsion dual mode switching structure on the hand tool. In the illustration, the hand tool is a socket wrench as an example, but it is not limited to this.

The structure and technology related to the torque setting and adjustment of the hand tool have been described in the prior art, and are not the technical features of the present invention, so they will not be described in detail here.

The hand tool includes a tubular body 10. The first end 11 of the tubular body 10 is connected to a working head 20. The second end of the tubular body 10 is provided with a handle 21. A torque setting member 16 is provided on the outside of the tubular body 10. The torque setting member 16 is located adjacent to the handle 21. The torque setting member 16 controls a torque control component (not shown) in the tubular body 10. The torque control component Adjust and control the torque value of the working head 20 . The torque control assembly is prior art and has been generally described in the prior art column. The torque control component can be mechanical or electronic, which is not limited in the present invention.

As shown in FIGS. 1 to 7 , the technical feature of the present invention is that the hand tool is provided with a switching structure 30 , and the switching structure 30 is used to control the hand tool into a torque mode or a non-torque mode. The switching structure 30 is located adjacent to the working head 20 .

The switching structure 30 includes an extension rod 31 , a pivot 32 , two blocks 33 , a switching member 34 , a limiting group 36 , and a switching mark 37 .

The first end of the extension rod 31 is integrally connected with the working head 20 , and the extension rod 31 extends into the first end 11 of the tubular body 10 . A pivot hole 311 is provided radially through the extension rod 31 and the tubular body 10 , and the pivot shaft 32 is set in the pivot hole 311 . The diameter of the extension rod 31 is smaller than the The inner diameter of the tubular body 10 allows the extension rod 31 to swing left and right in the tubular body 10 around the pivot 32 (as shown in Figure 12), so that the working head 20 and the tubular body 10 form a commonly known swing ( Shake head type connection. The second end of the extension rod 31 is connected to the aforementioned conventional torque control assembly.

The tube wall of the tubular body 10 is provided with a wall hole 13 at a position corresponding to the extending rod 31 . The outline shape and size of the wall hole 13 are consistent with the outline shape and size of the two stoppers 33 . , the two stoppers 33 are respectively disposed in the two wall holes 13 , and the two stoppers 33 can move back and forth in the two wall holes 13 . The surface of the two stoppers 33 relative to the extension rod 31 is an arc concave surface 331, and the surface different from the arc concave surface is a rounded arc convex surface 332. The curvature of the concave arc surface 331 is consistent with the contour curvature of the extension rod 31 .

The switching member 34 is a pipe sleeve structure, and is sleeved on the outside of the first end 11 of the tubular body 10 in a diameter-fitting and reciprocatingly rotatable manner. The extension rod 31 and the tubular body 10 are respectively provided with a first limiting ring 341 and a second limiting ring 342 to respectively limit the two ends of the switching member 34 so that there is no risk of separation from the tubular body 10 . The inner wall of the switching member 34 is provided with two limiting grooves 40, and both ends of the pivot shaft 32 extend into the two limiting grooves 40 respectively. The limiting groove 40 extends an arc length along the reciprocating rotation direction of the switching member 34 to limit the reciprocating rotation angle of the switching member 34 . The inner wall of the switching member 34 is provided with two relief grooves 41 , and the positions of the two relief grooves 41 correspond to the two stop blocks 33 . The relief groove 41 extends along an arc length along the reciprocating rotation direction and rotation angle of the switching member 34. The two ends of the arc length are respectively a stop surface 42 and a slope surface 43.

The limiting group 36 is provided in a limiting hole 35 in the tube wall of the switching member 34 and includes a screw 361 locked from the outside to the inside, a spring 362 contacted by the screw 361, and a spring 362 contacted by the spring 362. A ball reaches 363. The outer wall of the first end 11 of the tubular body 10 is provided with a first bead groove 14 and a second bead groove 15 along the annular direction. When the switching member 34 rotates back and forth, part of the ball 363 can sink into the third One bead groove 14 or the second bead groove 15.

The switching mark 37 is provided on the outer wall of the switching member 34 and the outer wall of the tubular body 10 at a position that is easily visible to the naked eye of the user. The switching mark 37 includes an indicator 371, a torque mark 372 (graphic or text), and a non-torque mark 373 (graphic or text). When the switching member 34 is rotated, the indicator 371 points to the torque mark 372, and part of the ball 363 sinks into the first ball groove 14, indicating that the hand tool is in the torque mode. When the switching member 34 is rotated, the indicator 371 points to the non-torque mark 373, and part of the ball 363 sinks into the second ball groove 15, indicating that the hand tool is in the non-torque mode.

As shown in FIGS. 4 to 7 , by rotating the switching member 34 and pointing the indicator 371 to the non-torque mark 373 , the hand tool is in the non-torque mode. In the non-torque mode, part of the ball 363 sinks into the second ball groove 15, and the switching member 34 rotates so that the sloped surface 43 contacts the rounded arc convex surface 332 of the stopper 33, and the sloped surface 43 pushes the two The stopper 33 moves toward the center of the tubular body 10 along the wall hole 13 until the two stoppers 33 sandwich the extension rod 31 with the arc concave surface 331 . The extension rod 31 is sandwiched and restricted by the two stoppers 33 at the center of the tubular body 10, and the extension rod 31 is restricted by the two stops 33 and cannot swing within the tubular body 10. The tubular body 10 is connected to the tubular body 10. The working head 20 is in a fixed relationship, and the torque exerted by the user on the hand tool will be transferred to fasteners such as bolts and nuts, which can be used to tighten or loosen the fasteners.

As shown in FIGS. 8 to 13 , by rotating the switching member 34 and pointing the indicator 371 to the torque mark 372 , the hand tool is in the torque mode. In the torque mode, part of the ball 363 sinks into the first ball groove 14, and the switching member 34 rotates to make the two relief grooves 41 relative to the two stops 33. The torque control assembly (commonly known as the torque control assembly) inside the tubular body 10 technology) to control the torque of the working head 20. When the hand tool operates screws 361, bolts and other threaded parts, and the tightening degree has reached the preset torque value, the tubular body 10 will generate a swing angle relative to the working head 20, so that the extension rod 31 is in the tubular Book When the body 10 swings, the stopper 33 relative to the swing direction is pushed into the corresponding relief groove 41 , and the stopper 33 has no binding force on the extension rod 31 .

As shown in FIG. 14 , in the torsion mode, the swing of the working head 20 and the extension rod 31 can push both the blocks 33 into the relief groove 41 .

10: Tubular body

16:Torque setting piece

20:Working head

21: handle

30:Switch structure

34:Switching piece

36:Limit group

Claims (4)

A torsion and non-torsion dual-mode switching structure of a hand tool. The hand tool is a hand tool with adjustable torque. The first end of an extension rod is integrally connected to a working head of the hand tool, and the extension rod extends into the hand tool. A first end of a tubular body of the tool, a pivot connecting the extension rod and the first end of the tubular body, the diameter of the extension rod being smaller than the inner diameter of the tubular body; the extension rod is provided on the tubular body Under the control of a torque adjustment component, the extension rod can swing in the tubular body around the pivot axis; it is characterized by: The hand tool is provided with a switching structure, which includes: Two stoppers are respectively provided in the two wall holes of the tubular body. The two stoppers can reciprocally slide in the two wall holes, and the direction of the reciprocating sliding is parallel to the swing direction of the extension rod; A switching member is sleeved on the outside of the first end of the tubular body and is reciprocally rotatable; the inner wall of the switching member is provided with two limit grooves, and the two ends of the pivot extend into the two limit grooves respectively. in the groove; the limit groove extends an arc length along the reciprocating rotation direction of the switching member; the inner wall of the switching member is provided with two relief grooves, and the positions of the two relief grooves correspond to the two stop blocks; the two relief grooves are along the edges of the two relief grooves. Extending an arc length along the reciprocating rotation direction of the switching member, the relief groove includes a sloped surface; Rotate the switching member so that the two relief grooves are relative to the two stoppers, the extension rod can swing within the tubular body, and the two stoppers are pushed into the two relief grooves. The hand tool is in torque mode; When the switching member is rotated, the slope surface pushes the stopper, and the two stoppers clamp the extension rod. The extension rod cannot swing within the tubular body, and the hand tool is in a non-torque mode. The torque and non-torsion dual mode switching structure of the hand tool as described in claim 1, wherein the surface of the stopper relative to the extension rod is set as a concave arc, and the surface of the stopper relative to the relief groove is a rounded arc. convex surface. The torque and non-torque dual-mode switching structure of the hand tool described in claim 1 further includes a switching mark, which is provided on the outer wall of the switching piece and the outer wall of the tubular body; the switching mark includes an indicator and a torque mark. , and a non-torque flag. The torque and non-torsion dual-mode switching structure of the hand tool as described in claim 3 further includes a limiting group radially provided in a limiting hole in the tube wall of the switching member; the limiting group includes a A screw is locked inside, a spring is contacted by the screw, and a ball is contacted by the spring; the outer wall of the first end of the tubular body is provided with a first ball groove and a second ball groove along the annular direction. Ball groove; when the indicator points to the torque mark, part of the ball falls into the first ball groove; when the indicator points to the non-torque mark, part of the ball falls into the second ball groove.

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