CN212372069U

CN212372069U - Torque wrench

Info

Publication number: CN212372069U
Application number: CN202020808204.9U
Authority: CN
Inventors: 朱黎
Original assignee: Suzhou Inspur Intelligent Technology Co Ltd
Current assignee: Suzhou Inspur Intelligent Technology Co Ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2021-01-19
Anticipated expiration: 2030-05-15

Abstract

The utility model relates to a torque wrench, which comprises a handle and a wrench head, wherein a handle groove is arranged on the circumferential surface below the handle, a rotating shaft is connected in the handle groove, a rotating hole is arranged on the wrench head, and the wrench head is rotatably connected on the rotating shaft through the rotating hole; the front end of the wrench head is provided with a clamping groove for clamping a cable joint, and the clamping groove is a stepped groove; the rear end of the wrench head is connected with a moment limiting mechanism, the moment limiting mechanism comprises a moment ball and a compression spring connected with the moment ball, the inner side of the handle groove is provided with a spring hole, and one end of the compression spring, which is far away from the moment ball, is connected with the bottom of the spring hole; the rear end of the wrench head is provided with an arc-shaped groove, and the torque ball is in contact connection with the arc-shaped groove. The device can meet the screwing-up of the cable connector in a narrow space, the screwing-up torque value is accurate, and meanwhile, the device can adapt to the fastening of various common cable connectors.

Description

Torque wrench

Technical Field

The utility model relates to a fastening tool technical field specifically is a torque wrench.

Background

The torque wrench is an indispensable tool for daily life and test, an opening or a trepanning for clamping a bolt or a nut is usually arranged at one end or two ends of a handle part of the torque wrench, when the torque wrench is used, external force is applied to the handle part along the rotation direction of a thread, the bolt or the nut can be screwed, and the torque wrench which is easy to use and portable can achieve half the effort.

In the server industry, when signal testing is carried out, a torque wrench is used under most conditions and is used for connecting cables and various conversion heads with testing equipment. Moment spanner among the prior art is mostly a style of calligraphy, connects the environment that is denser, the space is narrow and small to the cable, and a style of calligraphy moment spanner is difficult to operate, wastes time and energy and the effect is relatively poor.

Disclosure of Invention

For overcoming the above-mentioned problem that exists among the prior art, the utility model provides a torque wrench can satisfy the tightening of cable interface in the narrower space, and screws up the torque value accuracy, can adapt to the fastening that multiple common cable connects simultaneously.

The utility model discloses a realize through following technical scheme:

a torque wrench comprises a handle and a wrench head, wherein a handle groove is formed in the circumferential surface below the handle, a rotating shaft is connected in the handle groove, a rotating hole is formed in the wrench head, and the wrench head is rotatably connected to the rotating shaft through the rotating hole; the wrench head is characterized in that a clamping groove used for clamping a cable connector is formed in the front end of the wrench head, and the rear end of the wrench head is connected with a torque limiting mechanism.

Preferably, the moment limiting mechanism comprises a moment ball and a compression spring connected with the moment ball, a spring hole is formed in the inner side of the handle groove, and one end, far away from the moment ball, of the compression spring is connected to the bottom of the spring hole; the rear end of the wrench head is provided with an arc-shaped groove, and the torque ball is in contact connection with the arc-shaped groove.

Preferably, the clamping groove is a stepped groove.

Preferably, the upper end of the handle is sleeved with an anti-slip sleeve, and anti-slip threads in the axial direction are arranged on the anti-slip sleeve.

Preferably, the material of the anti-slip sleeve is rubber.

One end of the compression spring, which is far away from the moment ball, is fixedly connected to the bottom of the spring hole through strong glue.

Preferably, the connection mode of the rotating shaft and the handle is threaded connection.

The utility model has the advantages that:

1. the wrench head is vertically connected to the handle, so that the handle can conveniently extend into the environment with dense cable connection and narrow space to perform joint screwing operation.

2. The wrench head is in contact with the torque ball connected with the compression spring, the spring hole is filled with the compression of the spring to limit the tightening torque, the tightening torque is accurate, the structure is simple, and the cost is lower.

3. The wrench head is provided with multi-step-shaped clamping grooves, so that the wrench head can adapt to the tightening operation of various cable interfaces.

4. The handle is sleeved with the anti-skidding sleeve made of rubber, so that the hand skidding influence on fastening operation is avoided, and the personal injury to operators caused by the electric leakage of equipment during operation is prevented.

5. The bottom of the handle is provided with a threaded hole, and the rotating shaft is arranged in a handle groove of the handle from the bottom of the handle through the threaded hole, so that the wrench head and parts in the handle groove can be conveniently dismounted and maintained.

Drawings

The present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view (exploded view) of the overall structure of the present invention.

Fig. 3 is a sectional view of the connection structure of the middle wrench head and the handle of the present invention.

In the figure, 1-handle, 11-handle groove, 12-rotating shaft, 13-spring hole, 2-wrench head, 21-clamping groove, 22-rotating hole, 23-arc groove, 3-torque ball, 4-compression spring and 5-anti-slip sleeve.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1 to 2, the torque wrench of the present invention includes a handle 1 and a wrench head 2, wherein a handle groove 11 is formed on a circumferential surface below the handle 1, a rotating shaft 12 is connected in the handle groove 11, and an axis of the rotating shaft 12 is parallel to an axis of the handle 1; the wrench head 2 is provided with a rotating hole 22, and the wrench head 2 is rotatably connected to the rotating shaft 12 through the rotating hole 22. The wrench head 2 can thus rotate around the axis of rotation 12, and can only swing within a certain angular range because the wrench head 2 is in the handle slot 11.

The draw-in groove 21 that is used for centre gripping cable joint is offered to 2 front ends of spanner head, and draw-in groove 21 is multistage stairstepping recess, and the opening of recess can adapt to the fastening of the cable joint of multiple specification, and draw-in groove 21 is 2 rank stairstepping recesses in this implementation, can adapt to two kinds of common SMA cable head sizes, and a thing is dual-purpose, reduces the trouble of searching for the instrument, and the practicality is stronger.

The rear end of the wrench head 2 is connected with a torque limiting mechanism which can prevent the interface from being broken by excessive force during tightening, so that a maximum torque needs to be limited. Moment limiting mechanism includes moment ball 3 and connects in the compression spring 4 of moment ball 3, and spring hole 13 has been seted up to handle groove 11 inboard, and the diameter of moment ball 3 is greater than the internal diameter of spring hole 13, and compression spring 4 keeps away from the one end fixed connection of moment ball 3 in the bottom of spring hole 13, and moment ball 3 has certain distance from spring hole 13 entry, avoids compression spring 4 to play the spring force effect. The rear end of the wrench head 2 is provided with an arc-shaped groove 23, when the connector is screwed down, the clamping groove 21 of the wrench head 2 is stressed, the arc-shaped groove 23 is in contact with the torque ball 3, the torque force is transmitted to the compression spring 4, the compression spring 4 gives a reaction force F to the arc-shaped groove 23, the magnitude of the reaction force F is related to the compression length delta X of the compression spring 4, and the relation between the reaction force F and the compression length delta X follows the following formula:

F＝K*ΔX

where K is the spring constant of the spring.

The maximum allowable torque is set to 50N in this embodiment, the maximum force acting on the compression spring 4 is obtained according to the magnitude of the moment arm, the maximum force is also the restoring force of the compression spring 4 according to the acting force and the reacting force, the compression length of the compression spring 4 is obtained according to the restoring force, and then the depth of the spring hole 13 is designed so that the compression spring 4 is just compressed into the spring hole 13 at the time of the maximum torque, and the torque ball 3 just contacts with the inlet of the spring hole 13.

The upper end cover of handle 1 is equipped with anti-skidding cover 5, sets up the anti-skidding line of axial direction on the anti-skidding cover 5, and the material of anti-skidding cover 5 is the rubber material, avoids the hand slip to influence the fastening operation, and equipment electric leakage causes bodily injury to operating personnel during the while prevents to operate.

During production and installation, the torque ball 3 is welded on the compression spring 4, and then one end of the compression spring 4 away from the torque ball 3 is coated with super glue, wherein the super glue is cyanoacrylate and is then bonded at the bottom of the spring hole 13; the upper and lower positions of the rotating shaft 12 are provided with threaded holes arranged on the handle 1, wherein the threaded hole at the coaxial position below the rotating shaft 12 is a through hole, so that the rotating shaft 12 can be conveniently inserted into and installed from the lower end of the handle 1; handle groove 11 is put into wrench head 2 for wrench head 2's commentaries on classics hole 22 aligns the screw hole of handle 1, then goes pivot 12 dress, makes wrench head 2 can realize the rotation of certain angle around pivot 12, and the groove 23 and the contact compression spring 4 of moment ball 3 of rear end.

When in use, the torque wrench is placed on the bolt of the cable to be twisted and clamped on the corresponding clamping groove 21 according to the size of the cable joint to be twisted; handle 1 is rotated for wait to twist cable and the better combination of test equipment, continue handle 1 rotates, until cable and test equipment zonulae occludens (reach the maximum moment power), moment ball 3 can compress spring 4 and get into in handle 1's the spring hole 13 after receiving the moment power effect this moment, and 3 collisions of moment ball are in the entrance of spring hole 13, and the vibration that the collision arouses reminds the operator to screw up and put in place, prevents to continue to exert oneself and excessively to screw up the damage joint.

In the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "vertical", "horizontal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of describing the present invention, but do not require the present invention to be constructed or operated in a specific orientation, and therefore, cannot be construed as limiting the present invention. The terms "connected" and "connected" in the present invention are to be understood in a broad sense, and may be connected or detachably connected, for example; the terms may be directly connected or indirectly connected through intermediate components, and specific meanings of the terms may be understood as specific conditions by those skilled in the art.

The foregoing is a preferred embodiment of the present invention, and the description of the specific embodiments is only for better understanding of the idea of the present invention. To those skilled in the art, many modifications and equivalents may be made in accordance with the principles of the present invention and are deemed to fall within the scope of the invention.

Claims

1. The utility model provides a moment spanner, includes handle (1) and wrench end (2), its characterized in that: a handle groove (11) is formed in the circumferential surface below the handle (1), a rotating shaft (12) is connected in the handle groove (11), a rotating hole (22) is formed in the wrench head (2), and the wrench head (2) is rotatably connected to the rotating shaft (12) through the rotating hole (22); the front end of the wrench head (2) is provided with a clamping groove (21) for clamping a cable connector, and the rear end of the wrench head (2) is connected with a torque limiting mechanism.

2. A torque wrench as claimed in claim 1, wherein: the moment limiting mechanism comprises a moment ball (3) and a compression spring (4) connected to the moment ball (3), a spring hole (13) is formed in the inner side of the handle groove (11), and one end, far away from the moment ball (3), of the compression spring (4) is connected to the bottom of the spring hole (13); the rear end of the wrench head (2) is provided with an arc-shaped groove (23), and the torque ball (3) is in contact connection with the arc-shaped groove (23).

3. A torque wrench as claimed in claim 2, wherein: the clamping groove (21) is a stepped groove.

4. A torque wrench as claimed in claim 3, wherein: the anti-skidding handle is characterized in that an anti-skidding sleeve (5) is sleeved at the upper end of the handle (1), and anti-skidding threads in the axial direction are arranged on the anti-skidding sleeve (5).

5. A torque wrench as claimed in claim 4, wherein: the anti-slip sleeve (5) is made of rubber.

6. A torque wrench as claimed in claim 5, wherein: one end of the compression spring (4) far away from the moment ball (3) is fixedly connected to the bottom of the spring hole (13) through super glue.

7. A torque wrench as claimed in claim 6, wherein: the rotating shaft (12) is connected with the handle (1) in a threaded manner.