TWI788117B - torque wrench - Google Patents

Abstract

The present invention is applicable to the technical field of torque wrench, and provides a torque wrench, which includes a steel pipe, and also includes: an adjustment part, the adjustment part includes a slider body arranged in the steel pipe, and the slider body includes a first body and a second body. Main body, the side wall of the second main body is in contact with the inner wall of the steel pipe, the first main body is installed inside the second main body, a steel ball is installed between the first main body and the second main body, and the steel ball is fixed to the second main body by a spring Between the first main body and the second main body; the working part, the working part includes a driving head arranged at one end of the steel pipe, and the driving head is connected to the main body of the slider through a connecting assembly in conflict; and a handle for the user to hold A control part, a torsion spring matched with the control part is installed inside the steel pipe, and one end of the torsion spring is in contact with the first main body. The invention can effectively control wear, and solves the problem of poor precision after the steel pipe is worn due to force friction.

Description

torque wrench

The invention belongs to the technical field of torque wrench, in particular to a torque wrench.

Torque wrench is also called torque wrench and torque wrench. It can be divided into electric, pneumatic and manual in terms of power source. There are three types of manual torque wrenches common in the industry: preset torque wrench, digital display (electronic) torque wrench, dial torque wrench (also called pointer type). Each type of wrench has its own characteristics and is used in different occasions. For example, the preset torque wrench is mainly used for fastening the preset value of the bolt, the digital display (electronic) torque wrench and the dial torque wrench Wrenches are generally used for torque testing. Generally speaking, the use of torque wrench mainly lies in the precise control of bolt force value.

In the existing torque wrench, the slide block directly rubs against the steel pipe, which will lead to high friction resistance and affect the precision of the product. Another type is that the steel ball is in contact with the steel pipe, the steel ball is directly stressed on the steel pipe, and the hardness of the steel pipe directly affects the product accuracy. The accuracy of these two torsion springs will fluctuate with use, and the use effect is poor.

The purpose of the embodiments of the present invention is to provide a torque wrench, aiming to solve the problem that the slider of the existing torque wrench directly rubs against the steel pipe, resulting in high frictional resistance and affecting the accuracy of the product. And to solve the problem of contact between the steel ball and the steel pipe, the steel ball is directly stressed on the steel pipe, and the hardness of the steel pipe directly affects the product A question of precision. The accuracy of the torsion springs of the aforementioned two types of torque wrenches will fluctuate with use, and the use effect will be poor.

The embodiment of the present invention is realized in this way, a torque wrench includes a steel pipe, and further includes: an adjustment part, the adjustment part includes a slider main body arranged in the steel pipe, the slider main body includes a first main body and a second main body, The side wall of the second body is in contact with the inner wall of the steel pipe, the first body is installed inside the second body, a steel ball is installed between the first body and the second body, and the steel ball is fixed to the first body by a spring Between the second body and the second body; the working part, the working part includes a driving head arranged at one end of the steel pipe, and the driving head is connected to the slider main body through a connecting assembly; and a control part for the user to hold A torsion spring matched with the control part is installed inside the steel pipe, and one end of the torsion spring is in contact with the first main body.

In one embodiment, the connection assembly includes a dowel rod that is rotatably connected to the driving head, the dowel rod is inserted into the steel pipe, the dowel rod is installed in the steel pipe through a transmission pin, and the dowel rod is close to One end of the slider main body is provided with a collision block, and the slider main body is provided with a driving block cooperating with the collision block.

In one embodiment, the control part includes a handle body sheathed on the end of the steel pipe away from the driving head, an adjustment screw is installed inside the handle body, and the adjustment screw passes through the end of the steel pipe and is inserted into the steel pipe, and One end of the adjusting screw located inside the steel pipe is in contact with the torsion spring.

In one embodiment, the first body and the second body are engaged by a snap spring.

In one embodiment, the material of the first body and the second body is high hardness alloy.

In one embodiment, the steel ball is a high hardness steel ball.

In one embodiment, the outer wall of the handle body is embossed.

In a torque wrench provided by an embodiment of the present invention, in the process of force transmission, there is rolling friction between the first body and the second body, and the rolling friction force is smaller than the sliding friction between the second body and the steel pipe, so the first body Parallel sliding, the second body is in a fixed state, which can effectively control wear, It solves the problem that the precision becomes worse after the steel pipe is subjected to friction and wear.

1: handle body

2: steel pipe

3: dowel rod

4: Drive head

5: Adjusting screw

6: torsion spring

7: The first subject

8: Second subject

9: Spring

10: circlip

11: steel ball

12: Drive block

13: Collision block

14: Transmission pin

15: Slider body

Fig. 1 is a schematic structural view of a torque wrench provided by an embodiment of the present invention; Fig. 2 is a cross-sectional view of a torque wrench provided by an embodiment of the present invention.

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. The specific implementation manners of the present invention are illustrated below in conjunction with the drawings.

As shown in Figures 1 to 2, a torque wrench provided by an embodiment of the present invention includes a steel pipe 2, and also includes: an adjustment part, the adjustment part includes a slider main body 15 arranged in the steel pipe 2, and the slider The main body 15 includes a first main body 7 and a second main body 8, the side wall of the second main body 8 is in contact with the inner wall of the steel pipe 2, the first main body 7 is installed inside the second main body 8, the first main body 7 and the second main body A steel ball 11 is installed between the two main bodies 8, and the steel ball 11 is fixed between the first main body 7 and the second main body 8 by a spring 9; the working part, the working part includes a driving head 4 arranged at one end of the steel pipe 2, And the drive head 4 is connected with the slider main body 15 through the connecting assembly; and the control part for the user to hold, the inside of the steel pipe 2 is equipped with a torsion spring 6 that cooperates with the control part, and the torsion force One end of the spring 6 is in contact with the first main body 7. The control part includes a handle main body 1 sleeved on the end of the steel pipe 2 away from the driving head 4. An adjusting screw is installed inside the handle main body 1. 5, and the adjustment screw 5 penetrates the end of the steel pipe 2 and is inserted into the steel pipe 2 , and one end of the adjustment screw 5 inside the steel pipe 2 is in contact with the torsion spring 6 .

In the embodiment of the present invention, the first main body 7 and the second main body 8 are engaged by a snap spring 10 . The connection assembly includes a dowel 3 that is rotatably connected to the drive head 4, the dowel 3 is inserted into the steel pipe 2, the dowel 3 is installed in the steel pipe 2 through a transmission pin 14, the dowel 3 A collision block 13 is provided near one end of the slider main body 15, and a driving block 12 cooperating with the collision block 13 is provided on the slider main body 15. The outer wall of the handle main body 1 is embossed, which is convenient for users to hold. The principle of using the torque wrench is to adjust the torque through the rotation of the handle main body 1. The handle main body 1 can compress the torsion spring 6 by adjusting the screw rod 5 to output a constant torque; The power of the drive head 4 is applied by the sleeve on the screws and nuts. The transmission process of the force of the torque wrench: the torque of the torsion spring 6 is transmitted to the slider body 15, the force of the slider body 15 is correspondingly transmitted to the driving block 12, the force of the driving block 12 is transmitted to the collision block 13, and the collision The power of the block 13 is transmitted to the dowel 3, and finally output to the drive head 4. Wherein the dowel 3 has a degree of freedom in one direction and can rotate around the transmission pin 14, and the degree of freedom is limited by the space of the steel pipe 2. The driving block 12 has a degree of freedom. When the force reaches the set torque of the torsion spring 6, the torsion spring 6 will be compressed, and the driving block 12 will rotate, thereby driving the dowel bar 3 to rotate around the transmission pin 14, and the collision block 13 will instantly It will slip, and the collision block 13 will collide with the steel pipe 2 to make a noise. After the pressure is released, the torsion spring 6 returns to its original position, and the dowel bar 3 returns to its original position, and the entire torque release process is completed. The power transmission of the slider main body 15 is mainly completed by the first main body 7, and the contact between the first main body 7 and the second main body 8 is sliding friction through the steel ball 11, and the steel ball 11 is limited and fixed by the spring 9, and the steel ball 11 does not It will slide out of the track formed by the cooperation of the first body 7 and the second body 8; after the first body 7, the spring 9, and the steel ball 11 are assembled, they will penetrate into the second body 8 and be connected by the snap spring 10 to form a whole.

As shown in FIG. 2 , as a preferred embodiment of the present invention, the material of the first body 7 and the second body 8 is a high-hardness alloy. The steel ball 11 is a high hardness steel ball. It can effectively control wear and ensure product accuracy.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. All simple modifications, changes or equivalent replacements made within the spirit and principles of the present invention should be included in the protection scope of the present invention. within.

1: handle body

2: steel pipe

3: dowel rod

4: Drive head

5: Adjusting screw

6: torsion spring

7: The first subject

8: Second subject

9: Spring

10: circlip

11: steel ball

12: Drive block

13: Collision block

14: Transmission pin

15: Slider body

Claims (7)

A torque wrench, comprising a steel pipe, characterized in that it also includes: an adjustment part, the adjustment part includes a slider main body arranged in the steel pipe, the slider main body includes a first main body and a second main body, the first The side walls of the two main bodies are in contact with the inner wall of the steel pipe, the first main body is installed inside the second main body, a steel ball is installed between the first main body and the second main body, and the steel ball is fixed on the steel pipe by a spring Between the first body and the second body; the working part, the working part includes a driving head arranged at one end of the steel pipe, and the driving head is connected to the slider main body through a connecting assembly; and for supplying The control part held by the user, a torsion spring matched with the control part is installed inside the steel pipe, and one end of the torsion spring is in contact with the first main body. The torque wrench according to claim 1, wherein the connection assembly includes a dowel rod connected to the driving head, the dowel rod is inserted into the steel pipe, and the dowel rod is installed on the In the steel pipe, a collision block is provided on the end of the dowel bar close to the slider main body, and a driving block that cooperates with the collision block is provided on the slider main body. The torque wrench according to claim 1, wherein the control part includes a handle body sheathed on the end of the steel pipe away from the driving head, an adjustment screw is installed inside the handle body, and the adjustment screw runs through the The end of the steel pipe is inserted into the inside of the steel pipe, and one end of the adjusting screw located inside the steel pipe is in contact with the torsion spring. The torque wrench according to claim 1, wherein the first body and the second body are engaged by a snap spring. The torque wrench according to claim 1, wherein the material of the first body and the second body is a high-hardness alloy. The torque wrench according to claim 1, wherein the steel ball is a high-hardness steel ball. The torque wrench according to claim 3, wherein the outer wall of the handle body is embossed.

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