CN215318379U

CN215318379U - Torque wrench

Info

Publication number: CN215318379U
Application number: CN202120880607.9U
Authority: CN
Inventors: 林钰清
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-06
Filing date: 2021-04-27
Publication date: 2021-12-28
Anticipated expiration: 2031-04-27
Also published as: DE102021110959B4; TW202218814A; TWI746254B; DE102021110959A1

Abstract

The utility model relates to a torque wrench, comprising: a barrel; the first component comprises a rod body which is rotatably connected in the barrel part and a working head which is exposed out of the barrel part, and the rod body comprises a first engaging part; a second member, arranged in the barrel part, including a second engaging part, on a rotation path of the first member, the second engaging part being engaged with the first engaging part in a relatively displaceable manner; the elastic mechanism is connected inside the barrel and comprises a plurality of elastic arms, and the second component can radially force the elastic arms to abut against the elastic arms; when the torsion force between the second engaging part and the first engaging part is greater than a torsion force set value, the second member forcibly expands the plurality of elastic arms and enables the second engaging part and the first engaging part to jump off the original engaging position.

Description

Torque wrench

Technical Field

The utility model relates to a torque wrench.

Background

The general operation is to use a sleeve to mount and dismount a workpiece (such as a screw, a nut, etc.) on a machine. However, the torque value of the sleeve in the prior art is fixed and cannot be adjusted according to requirements, so that the user is difficult to control the force, the sleeve is inconvenient to assemble and disassemble, and the workpiece is easily damaged.

Therefore, the torque wrench is generated accordingly. In the prior art, a driving head is arranged at one end of a body of the torque wrench, and a torque assembly is arranged in the body of the torque wrench to control the torque within a set value, so that a workpiece is prevented from being damaged. However, the torque assembly of the conventional torque wrench can only provide a limited torque control range, and the assembling and disassembling application range is limited. In addition, the spring (usually a ring spring) of the mechanism for setting torque of the conventional torque wrench is normally subjected to a great direct axial compression, and elastic fatigue is easily generated after a period of time, which seriously affects the accuracy of the torque setting value.

Therefore, there is a need for a new and improved torque wrench to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a torque wrench, which can prevent the driven member or the workpiece from being damaged, and the torque setting value is very accurate.

To achieve the above object, the present invention provides a torque wrench, comprising: a barrel; the first component comprises a rod body which is rotatably connected in the barrel part and a working head which is exposed out of the barrel part, and the rod body comprises a first engaging part; a second member, arranged in the barrel part, including a second engaging part, on a rotation path of the first member, the second engaging part being engaged with the first engaging part in a relatively displaceable manner; the elastic mechanism is connected inside the barrel and comprises a plurality of elastic arms, and the second component can radially force the elastic arms to abut against the elastic arms; when the torsion force between the second engaging part and the first engaging part is greater than a torsion force set value, the second member forcibly expands the plurality of elastic arms and enables the second engaging part and the first engaging part to jump off the original engaging position.

Preferably, the first member is a ratchet working member, and the working head is a ratchet head.

Preferably, the elastic mechanism is assembled to the barrel in an axially adjustable manner with respect to the barrel.

Preferably, the elastic mechanism includes a first base and at least one first elastic member disposed on the first base, the first base is assembled on an inner wall of the barrel, and the at least one first elastic member includes the plurality of elastic arms.

Preferably, the elastic mechanism further includes a second base and at least one second elastic element disposed on the second base, the second base is axially adjustably assembled to the inner wall relative to the barrel, the first base is located between the second member and the second base, and the at least one second elastic element abuts against the outer sides of the plurality of elastic arms.

Preferably, the first base has a plurality of through slots, and the at least one second elastic element passes through the plurality of through slots.

Preferably, the at least one second elastic member includes a plurality of leaf springs, and respective ends of the leaf springs and ends of the at least one first elastic member are disposed in a staggered manner along an axial direction of the barrel member.

Preferably, the first base includes a receiving groove, and a portion of the at least one first elastic member is radially limited in the receiving groove.

Preferably, as the above technical solution, the second base extends to form an adjusting rod, the adjusting rod is connected to an adjusting member capable of rotating relative to the barrel, the barrel is further provided with a window and a torsion indicating portion, the adjusting rod is provided with a screw segment, an indicating member is engaged with the screw segment in a relatively axially movable manner and is displayed in the window, and the torsion indicating portion corresponds to the indicating member.

Preferably, in the above aspect, the first base is screwed to an inner wall of the barrel; the at least one first elastic component is pinned on the first base body; the second component also comprises a taper part which extends towards the elastic mechanism in a tapering way and is abutted between the plurality of elastic arms; the elastic mechanism further comprises a second base body and at least one second elastic piece arranged on the second base body, the second base body can be assembled on the inner wall in an axially adjustable mode relative to the barrel part, the first base body is located between the second component and the second base body, and the at least one second elastic piece abuts against the outer side of the plurality of elastic arms; the at least one second elastic piece is in pin joint with the second base body in a relatively rotatable manner; the first base body is provided with a plurality of through grooves, and the at least one second elastic piece penetrates through the plurality of through grooves; the at least one second elastic member comprises a plurality of leaf springs, and the respective ends of the plurality of leaf springs and the ends of the at least one first elastic member are arranged in a staggered manner along an axial direction of the barrel member; the first base body comprises a containing groove, and a part of the at least one first elastic piece is radially arranged in the containing groove in a limiting way; the second base extends with an adjusting rod which is connected with an adjusting piece which can rotate relative to the cylinder piece; the barrel part is also provided with a window and a torsion indicating part, the adjusting rod is provided with a screw section, an indicating part can be meshed with the screw section in a relatively axial moving way and is displayed in the window, and the torsion indicating part corresponds to the indicating part.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the technical solutions in the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a perspective view of a preferred embodiment of the present invention.

Fig. 2 is an exploded view of a preferred embodiment of the present invention.

FIG. 3 is a first cross-sectional view of the present invention.

FIG. 4 is a second sectional view of the present invention.

FIG. 5 is a cross-sectional view of a preferred embodiment of the present invention after disengagement from the original engaged position.

Fig. 6 to 8 are partially enlarged views of fig. 3 to 5, respectively.

Wherein, 1, the torque wrench; 10, a barrel part; 101, a window; 102, a torsion indicating part; 103, an indicator; 20: a first member; 21, a first engaging part; 22, a shaft body; 23, a working head; 30: a second member; 31, a second engaging portion; 32, a cone part; 40, an elastic mechanism; 41, a spring arm; 42: a first substrate; 422, passing through the groove; 423, containing groove; 43 a first elastic member; 44: a second substrate; 441, an adjusting rod; 442, a spiral section; 45, a second elastic piece; 451 is a plate spring; and (50) adjusting parts.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1 to 8, which show a preferred embodiment of the present invention, the torque wrench 1 of the present invention includes a barrel 10, a first member 20, a second member 30 and a resilient mechanism 40.

The first member 20 comprises a shaft 22 rotatably connected to the barrel 10 and a working head 23 exposed from the barrel, the shaft 22 comprises a first engaging portion 21, wherein the rotation comprises pivoting or swinging, and the barrel 10 serves as a handle of the wrench and may be of one-piece or multi-piece construction. The second member 30 is disposed inside the barrel 10, the second member 30 includes a second engaging portion 31, and the second engaging portion 31 is engaged with the first engaging portion 21 in a relative displacement manner on a rotation path of the first member 20 for transmitting the torque. The resilient mechanism 40 is connected to the inside of the barrel 10 and includes a plurality of resilient arms 41, and the second member 30 can radially urge the plurality of resilient arms 41 against the plurality of resilient arms 41. When a torque force applied between the second engaging portion 31 and the first engaging portion 21 is greater than a torque force set value, the second member 30 moves in a direction away from the first member 20 to urge the plurality of resilient arms 41 to be expanded and to allow the second engaging portion 31 and the first engaging portion 21 to jump from the original engaging position (from the position of fig. 6 to the position of fig. 8), thereby preventing damage to the driven member or the workpiece, and the plurality of resilient arms 41 are not directly pressed axially to be easily restored to the low-compression state, the plurality of resilient arms 41 are not easily elastically fatigued, and the torque force set value is very accurate.

In the present embodiment, the first member 20 is a ratchet workpiece, and the working head 23 is a ratchet head, which can be assembled or disassembled with different types or functions.

In detail, the second member 30 further includes a cone portion 32, the cone portion 32 extends toward the resilient mechanism 40 and abuts between the plurality of elastic arms 41, the cone portion 32 is beneficial to stably and smoothly abut against the plurality of elastic arms 41, and the effect of smooth and precise tripping torque value can be achieved. However, the tapered portion 32 may be configured in other configurations, such as a plurality of inclined guide slots, an inclined surface, an arc surface or any mechanism capable of urging the plurality of resilient arms. The first engaging portion 21 is a pin member provided at one end of the shaft 22, and the second engaging portion 31 is a roller member provided at the tapered portion 32, and has small friction, smooth operation and low loss. However, the first engaging portion 21 and the second engaging portion 31 may be a matching inclined surface, an arc surface or any geometric shape capable of engaging with each other in a relatively displaceable or disengageable manner.

Preferably, the resilient means 40 is axially adjustably assembled to the cartridge 10 relative to the cartridge 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 or assembled on the inner wall of the cylinder 10 in other ways, so as to adjust the position of the first base 42, and further adjust the abutting 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 assembled on the inner wall in an axially adjustable manner (threaded or other manner) relative to the cylinder 10, 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 is pin-connected to the second base 44 in a relatively rotatable manner, so as to facilitate rotation adjustment of the position of the second base 44, change the position of the at least one second elastic member 45 abutting against the plurality of elastic arms 41 and apply force, and further adjust the torque setting value of the torque wrench 1.

In the embodiment, the at least one first elastic element 43 is pinned 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 element 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 ends of the at least one first elastic member 43 are disposed in a staggered manner along an axial direction of the barrel 10, so that a larger operation torque range can be obtained by different abutting position relationships between the at least one first elastic member 43 and the plurality of leaf springs 451. The first base 42 further includes a receiving groove 423, and a portion of the at least one first elastic element 43 is radially and limitedly disposed in the receiving groove 423.

In addition, in the present embodiment, an adjusting rod 441 extends from the second base 44, and the adjusting rod 441 is connected to an adjusting member 50 capable of rotating relative to the barrel 10; the barrel 10 further defines a window 101 and is provided with a torque indicating portion 102, the adjusting rod 441 defines a screw segment 442, an indicating member 103 is engaged with the screw segment 442 in a relatively movable manner in the axial direction and is displayed in the window 101, and the torque indicating portion 102 corresponds to the indicating member 103 for indicating a set torque setting value.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A torque wrench, comprising:

a barrel;

the first component comprises a rod body which is rotatably connected in the barrel part and a working head which is exposed out of the barrel part, and the rod body comprises a first engaging part;

a second member, arranged in the barrel part, including a second engaging part, on a rotation path of the first member, the second engaging part being engaged with the first engaging part in a relatively displaceable manner;

the elastic mechanism is connected inside the barrel and comprises a plurality of elastic arms, and the second component can radially force the elastic arms to abut against the elastic arms;

when the torsion force between the second engaging part and the first engaging part is greater than a torsion force set value, the second member forcibly expands the plurality of elastic arms and enables the second engaging part and the first engaging part to jump off the original engaging position.

2. The torque wrench of claim 1, wherein the first member is a ratchet workpiece and the working head is a ratchet head.

3. The torque wrench of claim 1, wherein the resilient mechanism is axially adjustably assembled to the barrel.

4. The torque wrench according to any one of claims 1 to 3, wherein the resilient mechanism includes a first base and at least one first resilient member disposed on the first base, the first base is assembled to an inner wall of the barrel, and the at least one first resilient member includes the plurality of resilient arms.

5. The torque wrench as claimed in claim 4, wherein the resilient mechanism further includes a second base and at least one second resilient member disposed on the second base, the second base being axially adjustably assembled to the inner wall relative to the barrel, the first base being disposed between the second member and the second base, the at least one second resilient member abutting against the outer sides of the plurality of resilient arms.

6. The torque wrench of claim 5, wherein the first base has a plurality of slots through which the at least one second resilient member passes.

7. The torque wrench according to claim 5, wherein the at least one second resilient member includes a plurality of leaf springs, respective ends of the plurality of leaf springs being offset from ends of the at least one first resilient member in an axial direction of the barrel member.

8. The torque wrench according to claim 4, wherein the first base includes a receiving slot, and a portion of the at least one first resilient member is radially captively disposed in the receiving slot.

9. The torque wrench as claimed in claim 8, wherein the resilient mechanism further includes a second base and at least one second resilient member disposed on the second base, the second base is axially adjustably assembled to the inner wall relative to the barrel, the first base is disposed between the second member and the second base, the at least one second resilient member abuts against the outer side of the plurality of resilient arms, the second base extends to form an adjustment rod, the adjustment rod is connected to an adjustment member capable of rotating relative to the barrel, the barrel further defines a window and defines a torque indicator, the adjustment rod defines a threaded segment, an indicator is axially movably engaged with the threaded segment and is displayed in the window, and the torque indicator corresponds to the indicator.

10. The torque wrench of claim 4, wherein the first base is threaded to an inner wall of the barrel member; the at least one first elastic component is pinned on the first base body; the second component also comprises a taper part which extends towards the elastic mechanism in a tapering way and is abutted between the plurality of elastic arms; the elastic mechanism further comprises a second base body and at least one second elastic piece arranged on the second base body, the second base body can be assembled on the inner wall in an axially adjustable mode relative to the barrel part, the first base body is located between the second component and the second base body, and the at least one second elastic piece abuts against the outer side of the plurality of elastic arms; the at least one second elastic piece is in pin joint with the second base body in a relatively rotatable manner; the first base body is provided with a plurality of through grooves, and the at least one second elastic piece penetrates through the plurality of through grooves; the at least one second elastic member comprises a plurality of leaf springs, and the respective ends of the plurality of leaf springs and the ends of the at least one first elastic member are arranged in a staggered manner along an axial direction of the barrel member; the first base body comprises a containing groove, and a part of the at least one first elastic piece is radially arranged in the containing groove in a limiting way; the second base extends with an adjusting rod which is connected with an adjusting piece which can rotate relative to the cylinder piece; the barrel part is also provided with a window and a torsion indicating part, the adjusting rod is provided with a screw section, an indicating part can be meshed with the screw section in a relatively axial moving way and is displayed in the window, and the torsion indicating part corresponds to the indicating part.