CN219054211U

CN219054211U - Torque limiting wrench

Info

Publication number: CN219054211U
Application number: CN202223385814.0U
Authority: CN
Inventors: 陈铁东; 张亮
Original assignee: Suzhou Qingkesiyuan Technology Development Co ltd
Current assignee: Suzhou Qingkesiyuan Technology Development Co ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-05-23
Anticipated expiration: 2032-12-16

Abstract

The utility model provides a torque limiting wrench, and relates to a wrench used in a scene with high cleanliness requirement. The torque limiting wrench is convenient to use and various in functions, and work efficiency can be improved. The torque wrench comprises a locking head, wherein the locking head is movably connected with a handle, a first latch and a second latch are arranged on one side, which is contacted with a nut, of the locking head, a connecting surface is arranged on one side, which is contacted with the handle, of the locking head, the connecting surface is contacted with a thimble arranged in the handle, a spring is arranged at the other end of the thimble, the other end of the spring is fastened by a gland nut, an upper stop surface and a lower stop surface are respectively arranged on the upper side and the lower side of the connecting surface, the upper stop surface can be contacted with the upper end surface of the handle, and the lower stop surface can be contacted with the lower end surface of the handle.

Description

Torque limiting wrench

Technical Field

The utility model relates to the technical field of wrenches, in particular to a limited torque wrench.

Background

In the semiconductor industry, the sealing of joints and pipes is critical, so that the tightness requirements for screws and bolts are high, and the limited torque wrench can allow an operator to apply a specific torque value, on the one hand, to achieve the tightness requirements and, on the other hand, to prevent over-tightening from causing damage to the pipe body.

The existing limited torque wrench has single function, can only work under the set torque condition, and can apply a fixed torque value to the nut. In the actual tightening process, if the nut is initially tightened, another common wrench may need to be provided for assistance, which is complicated in operation process and is not beneficial to improving the working efficiency.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide the limited torque wrench which can improve the working efficiency, is convenient to use and has multiple functions.

The utility model relates to a torque wrench which comprises a locking head, wherein the locking head is movably connected with a handle, a first latch and a second latch are arranged on one side, which is contacted with a nut, of the locking head, a connecting surface is arranged on one side, which is contacted with the handle, of the locking head, a thimble is arranged in the handle, a spring is arranged at the other end of the thimble, the other end of the spring is fastened by a gland nut, an upper stop surface and a lower stop surface are respectively arranged on the upper side and the lower side of the connecting surface, the upper stop surface can be contacted with the upper end surface of the handle, and the lower stop surface can be contacted with the lower end surface of the handle.

The utility model defines a torque wrench wherein the angle formed by the first latch and the second latch and the center line of the mating surface of the nut is less than 180 degrees.

The utility model defines a torque wrench, wherein the connecting surface is a plane surface, an arc surface or a curved surface with a groove.

The utility model defines a torque wrench, wherein the locking head is movably connected with the handle through a connecting shaft, and the connecting shaft penetrates through the handle and is locked by using a clamping spring.

The utility model defines a torque wrench, wherein sealing rings are arranged on the end surfaces of two ends of the connecting shaft.

The utility model defines a torque wrench in which a sealing plug is mounted at the end of the handle.

The utility model defines a torque wrench wherein the gland nut is mounted inside the handle.

The limited torque wrench is different from the prior art in that the limited torque wrench is provided with two stop surfaces, so that the torque wrench can work under specific torque in the rotating process and can also be used as an ordinary wrench, and therefore, the nut can be initially tightened and finally tightened in the tightening process. The bayonet of the locking head is formed by a circumferential surface smaller than 1/2, and the bayonet is high in degree of freedom and convenient to use in the using process.

The torque limiting wrench of the present utility model is further described below with reference to the accompanying drawings.

Drawings

FIG. 1 is a front view of a torque wrench according to the present utility model;

FIG. 2 is a schematic view of the internal structure of the torque wrench of the present utility model;

FIG. 3 is a schematic diagram of the connection at A in FIG. 2;

FIG. 4 is a bottom view of the torque wrench of the present utility model;

FIG. 5 is a schematic view of the structure of the torque wrench of the present utility model illustrating the locking head in contact with the upper end surface of the handle;

FIG. 6 is a schematic view of the structure of the torque wrench of the present utility model illustrating the locking head in contact with the underside end surface of the handle;

FIG. 7 is a schematic view of the torque wrench of the present utility model in use;

the labels in the figures are: 1-a nut; 2-locking heads; 3-connecting shaft; 4-thimble; 5-a handle; 6-a spring; 7-capping the nut; 8, sealing plugs; 9-a sealing ring; 10-clamping springs; 11-specific linker.

Detailed Description

The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

As shown in fig. 1, 2 and 4, the torque wrench comprises a locking head 2, wherein the locking head 2 is movably connected with a handle 5 through a connecting shaft 3. The connecting shaft 3 passes through the handle 5 and locks the other end by using the clamp spring 10, and the end surfaces of the two ends are provided with sealing rings 9 to seal the metal piece. When in use, an operator holds the handle 5, and rotates the handle 5 to drive the nut 1 to rotate through the fastening fit between the locking head 2 and the nut 1.

One side of the locking head 2, which is contacted with the nut 1, is provided with a first latch and a second latch, and the first latch and the second latch are used for being matched with a tooth-shaped structure of the outer ring of the nut 1. The angle formed by connecting the circle centers of the matching surfaces of the first latch and the second latch and the nut 1 is smaller than 180 degrees, namely the circumferential range of the first latch and the second latch is smaller than half of the whole circumference, so that the locking head 2 is convenient to be engaged with the nut 1, and the locking head does not need to axially move from the first end to the second end of the specific nut 1.

The side of the locking head 2, which is contacted with the handle 5, is provided with a connecting surface. The connecting surface is contacted with the thimble 4 arranged in the handle 5. The other end of the thimble 4 is provided with a spring 6, and the thimble 4 and the locking head 2 are kept in contact by the spring 6 acting on the locking head 2 and rotate between a fastening position and a complete fastening position. The other end of the spring 6 is fastened by a gland nut 7, and the gland nut 7 is installed inside the handle 5. The end of the handle 5 is provided with a sealing plug 8 for sealing the structure inside the handle 5.

The connecting surface is contacted with the end surface of the thimble 4, and the elasticity of the spring 6 can be adjusted by rotating the length of the gland nut 7 to be screwed in, so that the torque can be adjusted. As shown in fig. 3, the connecting surface may be a plane surface or an arc surface, or may be processed with a groove to contact with the thimble 4.

The upper and lower sides of the connecting surface are respectively provided with an upper stop surface and a lower stop surface, when the locking head 2 rotates around the connecting shaft 3, the connecting surface is contacted with the thimble 4, as shown in fig. 5, when the upward rotation angle is overlarge, the upper stop surface on the locking head 2 is contacted with the upper side end surface of the handle 5, namely the surface B, so that the further upward rotation of the locking head 2 is limited; similarly, as shown in fig. 6, when the downward rotation angle is too large, the lower stop surface on the locking head 2 contacts the lower end surface of the handle 5, i.e., the C surface, to limit further downward rotation of the locking head 2. The locking head 2 can be rotated within a limited range by setting the position relation between the limiting surface and the end surface of the handle 5. The torque limiting wrench can be used as an ordinary wrench to initially tighten the nut 1 because the locking head 2 can rotate before reaching the limiting position.

As shown in fig. 7, when the torque wrench is used, the position of the gland nut 7 is firstly adjusted, namely the elastic force of the thimble 4 is compressed by the adjusting spring 6, so that the torque at the locking head 2 reaches a set value, then the first latch and the second latch on the locking head 2 are in butt joint with the nut 1, and then the handle 5 is rotated, so that the locking head 2 drives the nut 1 to rotate, and the set torque is installed on the specific joint 11.

The utility model limits the torque wrench to increase two stop surfaces, so that the torque wrench can work under specific torque in the rotating process and can also be used as an ordinary wrench, thereby ensuring that the nut 1 can be initially tightened and finally tightened in the tightening process. The bayonet of the locking head 2 is formed by a circumferential surface smaller than 1/2, and the bayonet is high in degree of freedom and convenient to use in the using process.

The torque wrench is limited to adopt a clean plastic structure at the part exposed outside the environment, so that pollution is avoided, and the requirements of clean rooms and the semiconductor industry are met; the metal part is sealed inside through the fluororubber sealing ring, so that the metal part is prevented from being contacted with the external environment.

While the utility model has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the utility model and are intended to be within the scope of the utility model as claimed.

Claims

1. A torque defining wrench, characterized by: including the latch head, latch head and handle swing joint, latch head and one side of nut contact are provided with first latch and second latch, and latch head and one side of handle contact are provided with the junction surface, and the junction surface contacts with the thimble that the handle inside set up, and the spring is installed to the other end of thimble, and gland nut fastening is used to the other end of spring, and the upper and lower both sides of junction surface are provided with backstop face and backstop face down respectively, go up the backstop face and can contact with the upside terminal surface of handle, and the backstop face can contact with the downside terminal surface of handle down.

2. The defined torque wrench of claim 1, wherein: and an angle formed by connecting the centers of the first latch and the second latch with the matching surface of the nut is smaller than 180 degrees.

3. The defined torque wrench of claim 1, wherein: the connecting surface is a plane, a cambered surface or a curved surface with a groove.

4. The defined torque wrench of claim 1, wherein: the locking head is movably connected with the handle through a connecting shaft, and the connecting shaft penetrates through the handle and is locked by using a clamp spring.

5. The defined torque wrench of claim 4, wherein: sealing rings are arranged on the end faces of the two ends of the connecting shaft.

6. The defined torque wrench of claim 1, wherein: and the tail end of the handle is provided with a sealing plug.

7. The defined torque wrench of claim 1, wherein: the gland nut is arranged in the handle.