TWM615600U - Torque wrench - Google Patents

Abstract

This creation relates to a torque wrench, including: a barrel; a first member, including a shaft rotatably connected to the barrel and a working head exposed on the barrel, the shaft including a first Engaging portion; a second member, located inside the cylinder, including a second engaging portion, on a rotation path of the first member, the second engaging portion and the first engaging portion are relatively displaceably engaged An elastic mechanism, connected to the inside of the cylinder and including a plurality of elastic arms, the second member can radially stretch the plurality of elastic arms to abut against the plurality of elastic arms; wherein, when the second engaging portion When a torsion force received between the first engaging portion and the first engaging portion is greater than a torque setting value, the second member forcibly stretches the plurality of elastic arms and causes the second engaging portion and the first engaging portion to escape from the original engaging position.

Description

Torque wrench

This creation is about a torque wrench.

In general operations, sleeves are often used for disassembly and assembly of mechanical workpieces (such as screws, nuts, etc.). However, the torque value of the sleeve of the prior art is fixed and cannot be adjusted according to requirements, which makes it difficult for the user to control the force, which causes inconvenience in disassembly and assembly, and easily damages the workpiece.

Therefore, the torque wrench was born accordingly. The body of the conventional torque wrench is provided with a driving head at one end, and a torque component is provided in the body of the torque wrench to control the torque within a set value and avoid damaging the workpiece. However, the torque component of the conventional torque wrench can only provide a relatively limited torque control range, and the application range of disassembly and assembly is relatively limited. In addition, the spring of the torque setting mechanism of the conventional torque wrench (usually a coil spring) is normally subjected to great direct axial compression, and it is prone to elastic fatigue after a period of time, which seriously affects the accuracy of the torque setting.

Therefore, it is necessary to provide a novel and progressive torque wrench to solve the above-mentioned problems.

The main purpose of this creation is to provide a torque wrench that can avoid damage to the driven parts or workpieces, and the elastic parts of the torque setting mechanism are not easy to be elastically fatigued, and the torque setting value is extremely accurate.

In order to achieve the above-mentioned object, this creation provides a torque wrench, which includes: a barrel; a first member, including a shaft rotatably connected to the barrel and a working head exposed on the barrel, the rod The body includes a first engaging portion; a second member, which is arranged inside the cylinder, includes a second engaging portion, on a rotation path of the first member, the second engaging portion and the first engaging portion Relatively displaceable meshing; an elastic mechanism connected to the inside of the cylinder and including a plurality of elastic arms, the second member can radially stretch the plurality of elastic arms to abut against the plurality of elastic arms; wherein, when When a torsion force received between the second engaging portion and the first engaging portion is greater than a torque setting value, the second member forces the plurality of elastic arms and causes the second engaging portion to jump out of the first engaging portion Original engagement position.

The following examples are only used to illustrate the possible implementation of this creation, but they are not intended to limit the scope of protection of this creation.

Please refer to FIGS. 1 to 8, which show a preferred embodiment of this creation. The torque wrench 1 of this creation includes a cylinder 10, a first member 20, a second member 30 and an elastic mechanism 40.

The first member 20 includes a shaft 22 rotatably connected to the tube 10 and a working head 23 exposed on the tube. The shaft 22 includes a first engaging portion 21, wherein the rotatably includes a The shaft rotates or swings, and the barrel 10 serves as the handle body of the wrench and can be a single-piece or multi-piece structure. The second member 30 is disposed inside the cylinder 10, and the second member 30 includes a second engaging portion 31. On a rotation path of the first member 20, the second engaging portion 31 engages with the first The part 21 can be relatively displaceably engaged for transmission of torsion force. The elastic mechanism 40 is connected to the inside of the cylinder 10 and includes a plurality of elastic arms 41. The second member 30 can radially stretch the plurality of elastic arms 41 and abut against the plurality of elastic arms 41. Wherein, when a torsion force received between the second engaging portion 31 and the first engaging portion 21 is greater than a set value of torsion force, the second member 30 moves in a direction away from the first member 20 to force the plurality of elastics. The arm 41 allows the second engagement portion 31 and the first engagement portion 21 to escape from the original engagement position (from the position in FIG. 6 to the position in FIG. 8), thereby avoiding damage to the driven part or the workpiece, and The plurality of elastic arms 41 are not directly subjected to axial compression force and are easier to return to a low compression state, the plurality of elastic arms 41 are not easy to be elastically fatigued, and the torque setting value is extremely accurate.

In this embodiment, the first member 20 is a ratchet working piece, and the working head 23 is a ratchet head, which has different types or functions of disassembly, assembly, driving, and assembly tool heads.

In detail, the second member 30 further includes a tapered portion 32 that extends toward the elastic mechanism 40 and abuts between the plurality of elastic arms 41. The tapered portion 32 is conducive to stability and smoothness. By opposing the plural elastic arms 41, the effect of smooth and precise jumping torque value can be achieved. Of course, the tapered portion 32 can be configured in other structural types, such as a plurality of inclined guide grooves, inclined surfaces, arc surfaces, or any mechanism that can resist the plurality of elastic arms. The first engaging portion 21 is a pin provided on one end of the shaft 22, and the second engaging portion 31 is a roller provided on the tapered portion 32, with low friction, smooth operation and low loss. Of course, the first engaging portion 21 and the second engaging portion 31 can be a matching inclined surface, a curved surface, or any geometric shape that can be relatively displaced or detachably engaged.

Preferably, the elastic mechanism 40 is assembled to the cylinder 10 such that it can be axially adjusted relative to the cylinder 10. The elastic mechanism 40 includes a first base 42 and at least one first elastic member 43 disposed on the first base 42. The first base 42 is assembled on an inner wall of the cylinder 10, and the first base 42 can be screwed. It is connected or assembled on the inner wall of the cylinder 10 in other ways to facilitate rotation adjustment of the position of the first base body 42 and further adjust the abutment state of the plurality of elastic arms 41 and the second member 30. The elastic mechanism 40 further includes a second base 44 and at least one second elastic member 45 disposed on the second base 44. The second base 44 can be axially adjusted relative to the cylinder 10 (screw connection or other methods) Assembled on the inner wall, the first base 42 is located between the second member 30 and the second base 44, and the at least one second elastic member 45 abuts against the outer side of the plurality of elastic arms 41. The at least one second elastic member 45 and the second base 44 are relatively rotatably pin-connected to facilitate rotational adjustment of the position of the second base 44 and change the at least one second elastic member 45 to abut the plurality of elastic arms 41 The position and force applied to adjust the torque setting value of the torque wrench 1.

In this embodiment, the at least one first elastic member 43 is pin-connected to the first base 42 and includes the plurality of elastic arms 41, the first base 42 is further provided with a plurality of through slots 422, and the at least one second elastic member 45 passes through the plurality of through slots 422. The at least one second elastic member 45 includes a plurality of leaf springs 451, and the respective ends of the plurality of leaf springs 451 and the end of the at least one first elastic member 43 are arranged in a high and low position along an axial direction of the tube member 10. The different contact position relationships between the at least one first elastic member 43 and the plurality of leaf springs 451 can obtain a larger operating torque range. The first base 42 further includes a receiving groove 423, and a part of the at least one first elastic member 43 is radially constrained and disposed in the receiving groove 423.

In addition, in this embodiment, the second base 44 extends with an adjusting rod 441, and the adjusting rod 441 is connected to an adjusting member 50 that can rotate relative to the tube member 10; the tube member 10 is additionally provided with a window 101 and A torsion indicating portion 102 is provided, the adjusting rod 441 is provided with a threaded segment 442, an indicating piece 103 is relatively axially movably engaged with the threaded segment 442 and displayed in the window 101, the torsion indicating portion 102 and the indicating piece 103 is corresponding to indicate the set torque setting value.

1: Torque wrench 10: Tube 101: Windows 102: Torque indicator 103: indicator 20: The first component 21: The first meshing part 22: Shaft 23: working head 30: second member 31: The second meshing part 32: Cone 40: Elastic mechanism 41: elastic arm 42: The first substrate 422: piercing 423: Conveyor 43: The first elastic part 44: second substrate 441: adjustment lever 442: Spiral Segment 45: second elastic part 451: Leaf Spring 50: adjustment parts

Figure 1 is a perspective view of a preferred embodiment of the creation. Figure 2 is an exploded view of a preferred embodiment of the creation. Figure 3 is a cross-sectional view in the first direction of creating a preferred embodiment. Figure 4 is a cross-sectional view in the second direction of creating a preferred embodiment. Figure 5 is a cross-sectional view of a preferred embodiment created after it is separated from the original engagement position. Fig. 6 to Fig. 8 are partial enlarged views of Fig. 3 to Fig. 5 respectively.

1: Torque wrench

10: Tube

20: The first component

50: adjustment parts

Claims (10)

A torque wrench includes: a barrel; a first member, including a shaft rotatably connected to the barrel and a working head exposed on the barrel, the shaft includes a first engaging portion; A second member is arranged inside the cylinder, and includes a second engaging portion. On a rotation path of the first member, the second engaging portion is engaged with the first engaging portion in a relatively displaceable manner; an elastic force The mechanism is connected to the inside of the cylinder and includes a plurality of elastic arms, the second member can radially stretch the plurality of elastic arms to abut against the plurality of elastic arms; wherein, when the second engaging portion and the first When a torsion force received between a meshing part is greater than a torque setting value, the second member forces the plurality of elastic arms to make the second meshing part and the first meshing part jump out of the original meshing position. The torque wrench according to claim 1, wherein the first member is a ratchet working piece, and the working head is a ratchet head. The torque wrench according to claim 1, wherein the elastic mechanism is assembled to the cylindrical member so as to be axially adjustable relative to the cylindrical member. The torque wrench according to any one of claims 1 to 3, wherein the elastic mechanism includes a first base body and at least one first elastic member provided on the first base body, and the first base body is assembled to one of the cylinder members On the inner wall, the at least one first elastic member includes the plurality of elastic arms. The torque wrench according to claim 4, wherein the elastic mechanism further includes a second base body and at least one second elastic member provided on the second base body, the second base body being axially adjustable relative to the cylinder member Assembled on the inner wall, the first base is located between the second member and the second base, and the at least one second elastic member abuts against the outer side of the plurality of elastic arms. The torque wrench according to claim 5, wherein the first base body is provided with a plurality of through grooves, and the at least one second elastic member passes through the plurality of through grooves. The torque wrench according to claim 5, wherein the at least one second elastic member includes a plurality of leaf springs, and the respective ends of the plurality of leaf springs and the end of the at least one first elastic member are formed along an axial direction of the cylindrical member High and low misalignment configuration. The torque wrench according to claim 5, wherein the first base body includes a receiving groove, and a part of the at least one first elastic member is radially constrained and disposed in the receiving groove. The torque wrench according to claim 8, wherein the second base body extends with an adjusting rod connected to an adjusting member rotatable relative to the tube member, and the tube member is additionally provided with a window and a torque indicating portion, the The adjusting rod is provided with a screw segment, an indicator piece is relatively axially movably engaged with the screw segment and displayed in the window, and the torsion force indicator portion corresponds to the indicator piece. The torque wrench according to claim 4, wherein the first base is screwed to the inner wall of the cylinder; the at least one first elastic member is pinned to the first base; the second member further includes a cone, The tapered portion gradually extends toward the elastic mechanism and abuts between the plurality of elastic arms; the elastic mechanism further includes a second base body and at least one second elastic member provided on the second base body, the second base body Assembled on the inner wall with axial adjustment relative to the cylinder, the first base is located between the second member and the second base, and the at least one second elastic member abuts against the outer side of the plurality of elastic arms; the At least one second elastic member and the second base body are relatively rotatably pin-connected; the first base body is provided with a plurality of through grooves, and the at least one second elastic member passes through the plurality of through grooves; the at least one second elastic member It includes a plurality of leaf springs, and the respective ends of the plurality of leaf springs and the end of the at least one first elastic member are arranged in a high-low offset configuration along an axial direction of the cylindrical member; the first base body includes a A receiving groove, a part of the at least one first elastic member is radially constrained and provided in the receiving groove; the second base body extends with an adjusting rod connected to an adjusting member rotatable relative to the barrel member; the barrel There is a window and a torsion indicating part, the adjusting rod is provided with a screw segment, an indicating piece can be movably engaged with the screw segment and displayed in the window, and the torque indicating part is opposite to the indicating piece. correspond.

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