Torque wrench

Abstract

The utility model discloses a torque wrench which comprises a shell, a ratchet head, an adjusting portion and a handle sleeve, the ratchet head is connected with a lever, the ratchet head is a beryllium bronze head, the lever is a beryllium bronze lever, the lever is inserted into the shell and fixed in the shell through a lever pin, and the adjusting portion comprises a connecting rod, a sliding assembly, a compression spring and a screw assembly. The connecting rod is a beryllium bronze connecting rod, the compression spring is a beryllium bronze spring, the connecting rod is connected with the lever, and the compression spring is arranged between the sliding assembly and the screw assembly. The torque wrench is ingenious in design and high in practicability, the ratchet wheel head, the lever, the connecting rod and the compression spring are all made of beryllium bronze, and beryllium bronze has the characteristics of non-ferromagnetism and low spark generation and further has good thermal stability and high strength, so that the torque wrench is not prone to generating sparks and good in anti-explosion performance in the using process, and the torque wrench is suitable for popularization and application. The use safety of the torque wrench in flammable and explosive environments is improved, and meanwhile high precision, high stability and long service life of the wrench can be guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of wrench technology, specifically relating to a torque wrench. Background Technology

[0002] In numerous fields such as industrial production, equipment maintenance, aerospace, petrochemicals, and mining, torque wrenches are widely used as an important tool for tightening bolts, nuts, and other fasteners to ensure that the tightening torque of the connection meets design requirements, thereby guaranteeing the safety and reliability of the equipment. However, with the continuous development of industrial technology and increasingly stringent safety standards, the limitations of traditional torque wrenches in specific application scenarios are becoming increasingly apparent, especially when used in flammable and explosive environments, where their safety and reliability face severe challenges. Utility Model Content

[0003] The purpose of this utility model is to solve the above-mentioned technical problems existing in the prior art and provide a torque wrench with a clever and reasonable structural design and strong practicality. The ratchet head, lever, connecting rod, compression spring and other components are all made of beryllium bronze. Beryllium bronze has non-ferromagnetic and low spark generation characteristics, as well as good thermal stability and high strength, which makes the torque wrench less likely to generate sparks during use, with good explosion-proof performance, improving the safety of the torque wrench in flammable and explosive environments, while also ensuring the wrench's high precision, high stability and long service life.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A torque wrench includes a housing, a ratchet head, an adjusting part, and a handle sleeve. The ratchet head is connected to a lever, and the ratchet head is a beryllium bronze head. The lever is a beryllium bronze lever and is inserted into the housing. The lever is fixed in the housing by a lever pin. The adjusting part includes a connecting rod, a sliding assembly, a compression spring, and a screw assembly. The connecting rod is a beryllium bronze connecting rod, and the compression spring is a beryllium bronze spring. The connecting rod is connected to the lever, and the compression spring is located between the sliding assembly and the screw assembly.

[0006] Furthermore, the housing is made of aluminum bronze, and the handle sleeve is also made of aluminum bronze. The design is reasonable. Aluminum bronze has high strength and hardness, which improves the overall durability of the torque wrench. Aluminum bronze also has excellent wear resistance and corrosion resistance, which can extend the service life of the housing and handle sleeve.

[0007] Furthermore, the sliding assembly is made of beryllium bronze, and the screw assembly is made of beryllium bronze. All components of the sliding assembly and screw assembly are made of beryllium bronze, which improves the explosion-proof performance of the torque wrench and thus significantly improves the operational safety of the torque wrench.

[0008] Furthermore, the connecting rod is located inside the housing, with one end inserted into the lever. The connecting rod is fixed inside the lever by a connecting rod pin, which connects the connecting rod to the housing, ensuring connection stability and reliability. It is also easy to install and disassemble, facilitating practical operation.

[0009] Furthermore, the sliding assembly is located inside the housing and includes a connecting rod sleeve, a square hole insert, a block, and a sliding column. The side walls of the connecting rod sleeve and the sliding column are in contact with the inner side wall of the housing. The connecting rod sleeve is fitted onto the outside of the connecting rod and is fixed to the connecting rod by a connecting rod pin. The square hole insert is inserted into the end of the connecting rod away from the lever and connects to the block. The block connects to the sliding column, which is in contact with a compression spring. The dual design of the connecting rod sleeve and the sliding column provides precise guidance for the sliding assembly, reduces deviation during sliding, and improves the accuracy of the torque wrench. The connecting rod sleeve and the connecting rod are connected by a connecting rod pin, ensuring connection stability and reliability, and making installation and disassembly convenient and simple.

[0010] Furthermore, the screw assembly includes an adjusting screw and an adjusting nut. The adjusting screw is located inside the handle sleeve, with one end inserted into the housing. The adjusting nut is located inside the housing and is fixed inside the housing by an adjusting nut pin. The adjusting screw thread passes through the adjusting nut. Rotating the adjusting screw can achieve precise linear displacement, changing the length of the adjusting screw inserted into the housing, thereby changing the preload of the compression spring to meet different operational requirements.

[0011] Furthermore, the screw assembly also includes a flat spring washer, which is located at the end of the adjusting screw near the compression spring. The flat spring washer contacts the compression spring, and a steel ball is provided between the flat spring washer and the adjusting screw. Both the flat spring washer and the adjusting screw are provided with limiting holes, and the steel ball is rolled and limited within the limiting holes. The design of the steel ball can prevent the compression spring from rotating when the adjusting screw rotates.

[0012] Furthermore, the adjusting screw is equipped with a nut and a lock nut. The adjusting screw is fixed to the handle sleeve by the nut and lock nut. By rotating the handle sleeve, the handle sleeve drives the adjusting screw to rotate, which compresses and releases the pressure spring. Adjusting the spring pressure adjusts the torque. The nut and lock nut form a double fixation, ensuring the connection between the adjusting screw and the handle sleeve is firm and avoiding the risk of the adjusting screw falling off during rotation, thus ensuring the safety of the torque wrench.

[0013] Furthermore, the handle sleeve is installed on the end of the housing away from the ratchet head. The outer side of the handle sleeve is provided with anti-slip patterns. The handle sleeve is connected to the housing through a positioning sleeve. A positioning sleeve steel post and a return spring are provided between the positioning sleeve and the handle sleeve. A plugging back cover is inserted and installed at the end of the handle sleeve away from the housing. A plum blossom hole insert is provided inside the plugging back cover. The plum blossom hole insert abuts against the adjusting screw.

[0014] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0015] This utility model features a clever and reasonable structural design with strong practicality. Except for the shell and handle sleeve, which are made of aluminum bronze, other core components such as the ratchet head, lever, connecting rod, and compression spring are made of beryllium bronze. Beryllium bronze has non-ferromagnetic and low spark generation characteristics, as well as good thermal stability and high strength. This makes the torque wrench less prone to sparking during use, provides good explosion-proof performance, and improves the safety of the torque wrench in flammable and explosive environments. At the same time, it can also ensure the wrench's high precision, high stability, and long service life, significantly improving the wrench's performance. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings:

[0017] Figure 1 This is an exploded view of a torque wrench according to the present invention.

[0018] In the diagram: 1-Housing; 2-Ratchet head; 3-Handle sleeve; 4-Lever; 5-Lever pin; 6-Connecting rod; 7-Compression spring; 8-Connecting rod pin; 9-Connecting rod sliding sleeve; 10-Square hole insert; 11-Cube; 12-Sliding column; 13-Connecting rod sleeve pin; 14-Adjusting screw; 15-Adjusting nut; 16-Adjusting nut pin; 17-Nut; 18-Anti-loosening nut; 19-Flat spring washer; 20-Steel ball; 21-Spring washer; 22-Positioning sleeve; 23-Positioning sleeve steel column; 24-Reset spring; 25-Plug back cover; 26-Plum blossom hole insert; 27-Lever pin retaining ring; 28-O-ring. Detailed Implementation

[0019] like Figure 1 As shown, this utility model discloses a torque wrench, comprising a housing 1, a ratchet head 2, an adjusting part, and a handle sleeve 3. The ratchet head 2 is connected to a lever 4, which is made of beryllium bronze. The lever 4 is also made of beryllium bronze. The lever 4 is inserted into the housing 1 and fixed within the housing 1 by a lever pin 5. The lever pin 5 enables quick and precise positioning and installation of the lever 4 within the housing 1, ensuring connection stability and reliability. A lever pin retaining ring 27 is provided in the annular groove at the tail of the lever pin 5, further enhancing the fixing effect of the lever pin 5 and preventing it from loosening or falling off during wrench use. An O-ring 28 is fitted onto the lever 4, located between the housing 1 and the ratchet head 2, preventing direct hard contact between the ratchet head 2 and the housing 1, thus avoiding frictional damage.

[0020] The adjusting part includes a connecting rod 6, a sliding assembly, a compression spring 7, and a screw assembly. The connecting rod 6 is made of beryllium bronze, and the compression spring 7 is also made of beryllium bronze. The connecting rod 6 is connected to the lever 4, and the compression spring 7 is located between the sliding assembly and the screw assembly. The connecting rod 6 is located inside the housing 1, with one end inserted into the lever 4. The connecting rod 6 is fixed inside the lever 4 by a connecting rod pin 8. The connecting rod pin 8 connects the connecting rod 6 to the housing 1, ensuring connection stability and reliability, and facilitating easy installation and disassembly for practical operation.

[0021] The housing 1 is made of aluminum bronze, and the handle sleeve 3 is also made of aluminum bronze. The design is reasonable; aluminum bronze has high strength and hardness, improving the overall durability of the torque wrench. Aluminum bronze also has excellent wear resistance and corrosion resistance, extending the service life of the housing 1 and handle sleeve 3. The sliding assembly and screw assembly are both made of beryllium bronze, further improving the torque wrench's explosion-proof performance and significantly enhancing its operational safety.

[0022] The sliding assembly is located inside the housing 1. The sliding assembly includes a connecting rod sleeve 9, a square hole insert 10, a block 11, and a sliding column 12. The side walls of the connecting rod sleeve 9 and the sliding column 12 are in contact with the inner side wall of the housing 1. The connecting rod sleeve 9 is sleeved on the outside of the connecting rod 6 and is fixed to the connecting rod 6 by a connecting rod pin 13. The square hole insert 10 is inserted into the end of the connecting rod 6 away from the lever 4. The square hole insert 10 is connected to the block 11, and the block 11 is connected to the sliding column 12. The sliding column 12 is in contact with the compression spring 7. The dual design of the connecting rod sleeve 9 and the sliding column 12 can provide precise guidance for the sliding assembly, reduce deviations during the sliding process, and improve the accuracy of the torque wrench. The connecting rod sleeve 9 and the connecting rod 6 are connected by the connecting rod pin 13 to ensure connection stability and reliability, and installation and disassembly are convenient and simple.

[0023] The screw assembly includes an adjusting screw 14 and an adjusting nut 15. The adjusting screw 14 is located inside the handle sleeve 3, with one end inserted into the housing 1. The adjusting nut 15 is located inside the housing 1 and is fixed inside the housing 1 by an adjusting nut pin 16. The adjusting screw 14 is threaded through the adjusting nut 15. Rotating the adjusting screw 14 allows for precise linear displacement, changing the length of the adjusting screw 14 inserted into the housing 1, thereby changing the preload of the compression spring 7 to meet different operational requirements. The screw assembly also includes a flat spring washer 19, located at the end of the adjusting screw 14 near the compression spring 7. The flat spring washer 19 contacts the compression spring 7, and a steel ball 20 is positioned between the flat spring washer 19 and the adjusting screw 14. Both the flat spring washer 19 and the adjusting screw 14 have limiting holes, and the steel ball 20 is rolled and limited within the limiting holes. The design of the steel ball 20 prevents the compression spring 7 from rotating when the adjusting screw 14 rotates. The adjusting screw 14 is equipped with a nut 17 and a lock nut 18. The adjusting screw 14 is fixed to the handle sleeve 3 by the nut 17 and the lock nut 18. The lock nut 18 has a spring washer 21 on its side to prevent it from loosening. By rotating the handle sleeve 3, the adjusting screw 14 is rotated, which compresses and releases the pressure spring 7. The torque is adjusted by adjusting the pressure of the compression spring 7. The nut 17 and the lock nut 18 can form a double fixation to ensure the connection between the adjusting screw 14 and the handle sleeve 3, avoid the risk of the adjusting screw 14 falling off during rotation, and ensure the safety of the torque wrench.

[0024] The handle sleeve 3 is installed on the end of the housing 1 away from the ratchet head 2. The outer side of the handle sleeve 3 is provided with anti-slip pattern to increase the contact friction between the hand and the handle sleeve 3, avoid the torque wrench from going out of control due to hand slippage, reduce the risk of operation error, and improve the safety and stability of operation. The handle sleeve 3 is connected to the housing 1 through the positioning sleeve 22. The positioning sleeve 22 and the handle sleeve 3 are provided with a positioning sleeve steel column 23 and a return spring 24. The end of the handle sleeve 3 away from the housing 1 is inserted and installed with a plug back cover 25. The plug back cover 25 is provided with a plum blossom hole insert 26, which abuts against the adjusting screw 14.

[0025] This utility model features an ingenious and reasonable structural design with strong practicality. Except for the housing 1 and handle sleeve 3, which are made of aluminum bronze, other core components such as the ratchet head 2, lever 4, connecting rod 6, and compression spring 7 are all made of beryllium bronze. Beryllium bronze has non-ferromagnetic and low spark generation characteristics, as well as good thermal stability and high strength. This makes the torque wrench less prone to sparking during use, provides good explosion-proof performance, and improves the safety of the torque wrench in flammable and explosive environments. At the same time, it can also ensure the wrench's high precision, high stability, and long service life, significantly improving the wrench's performance.

[0026] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A torque wrench, comprising a housing, a ratchet head, an adjusting part, and a handle sleeve, characterized in that: The ratchet head is connected to a lever, the ratchet head is a beryllium bronze head, the lever is a beryllium bronze lever, the lever is inserted into the housing, and the lever is fixed in the housing by a lever pin; The adjusting part includes a connecting rod, a sliding assembly, a compression spring, and a screw assembly. The connecting rod is a beryllium bronze connecting rod, and the compression spring is a beryllium bronze spring. The connecting rod is connected to the lever, and the compression spring is located between the sliding assembly and the screw assembly.

2. A torque wrench according to claim 1, characterized in that: The housing is made of aluminum bronze, and the handle sleeve is made of aluminum bronze.

3. A torque wrench according to claim 1, characterized in that: The sliding component is a beryllium bronze sliding component.

4. A torque wrench according to claim 1, characterized in that: The screw assembly is a beryllium bronze screw assembly.

5. A torque wrench according to claim 1, characterized in that: The connecting rod is located inside the housing, one end of the connecting rod is inserted into the lever, and the connecting rod is fixed inside the lever by a connecting rod pin.

6. A torque wrench according to claim 1, characterized in that: The sliding assembly is disposed within the housing and includes a connecting rod sleeve, a square hole insert, a block, and a sliding column. The sidewalls of the connecting rod sleeve and the sliding column are in contact with the inner sidewall of the housing. The connecting rod sleeve is fitted onto the outside of the connecting rod and is fixed to the connecting rod by a connecting rod pin. The square hole insert is inserted into the end of the connecting rod away from the lever and is connected to the block. The block is connected to the sliding column, and the sliding column is in contact with the compression spring.

7. A torque wrench according to claim 1, characterized in that: The screw assembly includes an adjusting screw and an adjusting nut. The adjusting screw is located inside the handle sleeve, and one end of the adjusting screw is inserted into the housing. The adjusting nut is located inside the housing and is fixed inside the housing by an adjusting nut pin. The adjusting screw is threaded through the adjusting nut.

8. A torque wrench according to claim 7, characterized in that: The screw assembly also includes a flat spring washer, which is located at the end of the adjusting screw near the compression spring. The flat spring washer is in contact with the compression spring. A steel ball is provided between the flat spring washer and the adjusting screw. Both the flat spring washer and the adjusting screw are provided with limiting holes, and the steel ball is rolled and limited within the limiting holes.

9. A torque wrench according to claim 7, characterized in that: The adjusting screw is provided with a nut and a lock nut, and the adjusting screw is fixed to the handle sleeve by the nut and the lock nut.

10. A torque wrench according to claim 1, characterized in that: The handle sleeve is installed on the end of the housing away from the ratchet head. The handle sleeve is connected to the housing via a positioning sleeve. A plugging back cover is inserted into the end of the handle sleeve away from the housing.

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