Anti-loosening and stopping device for pin shaft

Abstract

The utility model provides an anti-loosing and stopping device for a pin shaft, which belongs to the field of mechanical equipment and comprises the pin shaft, two tensioning sleeves, a shaft hole and two screws, the pin shaft penetrates through the shaft hole, the two tensioning sleeves are respectively arranged on the outer sides of two ends of the pin shaft, and the two screws are respectively arranged at two ends of the pin shaft. After the screw and the threaded hole of the pin shaft are tightened, the tensioning sleeve and the pin shaft extrude each other, and the tensioning sleeve is expanded and keeps extruding the shaft hole, so that the tensioning sleeve, the shaft hole and the diameter of the pin shaft are kept in a tensioning state, huge tensioning force is generated, and the anti-loosening and locking effects are achieved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical equipment, in particular to a loosening prevention and stopping device for a pin shaft. Background Technique

[0002] At present, the installation method of the pin shaft is mainly that the pin shaft passes through the shaft hole, and there must be a certain fitting clearance. Then, the pin shaft is prevented from rotating by a clamping block. As Figure 1 and Figure 2 shown, after the pin shaft ① passes through the shaft hole ③, the clamping plate ② is used to clamp and prevent it from rotating; it is used in various mechanical equipment. However, there is a certain fitting clearance between the pin shaft and the shaft hole diameter. During the working process, due to frequent activities and harsh working conditions, the pin shaft rotates under force continuously, which will impact the shaft hole wall. After long-term impact, the shaft hole will be worn larger or deformed, resulting in the pin shaft becoming looser and looser. After the shaft hole becomes larger, the entire workpiece will be scrapped. Therefore, a loosening prevention and stopping device for the pin shaft is needed. Content of the Utility Model

[0003] The purpose of the utility model is to provide a loosening prevention and stopping device for a pin shaft, and solve the technical problem that the existing pin shaft rotates under force during the working process and causes loosening. The loosening prevention and stopping device for the pin shaft provided by the utility model can ensure that the diameters of the pin shaft and the shaft hole are in a tension state, which can not only prevent loosening but also prevent the pin shaft from rotating.

[0004] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0005] A loosening prevention and stopping device for a pin shaft includes a pin shaft, two tension sleeves, a shaft hole and two screws. The pin shaft is arranged through the shaft hole, the two tension sleeves are respectively arranged on the outer sides of both ends of the pin shaft, and the two screws are respectively arranged at both ends of the pin shaft.

[0006] Further, both ends of the pin shaft are respectively arranged as conical structures.

[0007] Further, threaded holes are respectively arranged inside both ends of the pin shaft, and the screws are screwed tightly with the threaded holes of the pin shaft.

[0008] Further, a gasket is arranged between the screw and the pin shaft.

[0009] Further, the tension sleeve is sleeved on the pin shaft, and the tension sleeve is arranged inside the shaft hole.

[0010] Further, the inner hole of the tension sleeve is arranged as a conical structure.

[0011] Further, a tension sleeve notch 7 is arranged on the tension sleeve.

[0012] Due to the adoption of the above technical scheme, the utility model has the following beneficial effects:

[0013] After the screw is tightened with the threaded hole of the pin shaft, the tension sleeve and the pin shaft are mutually extruded. The tension sleeve is expanded and keeps pressing the shaft hole. Thus, the tension sleeve is in a tension state with the shaft hole and the diameter of the pin shaft, generating a huge tension force, so as to achieve the effects of anti-loosening and anti-rotation. Description of the Drawings

[0014] Figure 1 is a schematic diagram of the installation of a traditional pin shaft;

[0015] Figure 2 is a cross-sectional view of the installation of a traditional pin shaft;

[0016] Figure 3 is a cross-sectional view of the anti-loosening and anti-rotation device of the pin shaft of the present utility model;

[0017] Figure 4 is a disassembled schematic diagram of the anti-loosening and anti-rotation device of the pin shaft of the present utility model;

[0018] Figure 5 is a cross-sectional view of the wear-resistant pin shaft of the present utility model;

[0019] Figure 6 is a schematic diagram of the tension sleeve of the present utility model.

[0020] In the drawings, 1 - pin shaft, 2 - tension sleeve, 3 - shaft hole, 4 - gasket, 5 - screw, 6 - threaded hole, 7 - tension sleeve notch. Detailed Description of the Preferred Embodiments

[0021] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the following preferred embodiments are given with reference to the drawings for further detailed description of the present utility model. However, it should be noted that many details listed in the specification are only for enabling the reader to have a thorough understanding of one or more aspects of the present utility model, and these aspects of the present utility model can be implemented even without these specific details.

[0022] As Figure 3-4 shown, an anti-loosening and anti-rotation device for a pin shaft includes a pin shaft 1, two tension sleeves 2, a shaft hole 3 and two screws 5. The pin shaft 1 is arranged through the shaft hole 3, and the two tension sleeves 2 are respectively arranged on the outer sides of both ends of the pin shaft 1, and the two screws 5 are respectively arranged at both ends of the pin shaft 1. After the screw 5 is tightened on the pin shaft 1 in the present utility model, a huge tension force is generated between the tension sleeve 2, the shaft hole 3 and the pin shaft 1, so as to achieve the effects of anti-loosening and anti-rotation.

[0023] As Figure 3 and Figure 5As shown, both ends of the pin shaft 1 are respectively provided with a conical structure, and screw holes 6 are respectively arranged inside both ends of the pin shaft 1. The screw 5 is tightly arranged with the screw hole 6 of the pin shaft 1, and a gasket 4 is arranged between the screw 5 and the pin shaft 1. After the screw is tightened with the screw hole of the pin shaft in the utility model, the tension sleeve and the pin shaft are mutually extruded, the tension sleeve is expanded and keeps extruding the shaft hole, so that a huge tension force is generated between the tension sleeve and the shaft hole and the pin shaft, thus achieving the effects of anti-loosening and anti-rotation.

[0024] As Figure 3 and Figure 6 shown, the tension sleeve 2 is sleeved on the pin shaft 1, and the tension sleeve 2 is arranged inside the shaft hole 3. The inner hole of the tension sleeve 2 is provided with a conical structure, so that after the tension sleeve 2 is sleeved on both ends of the pin shaft 1, the outer diameters of both ends of the pin shaft 1 are the same as the outer diameter of the middle part of the pin shaft 1, and a tension sleeve notch 7 is arranged on the tension sleeve 2.

[0025] The anti-loosening and anti-rotation device of the pin shaft of the utility model is used for various mechanical equipment, and this device can ensure that the diameters of the pin shaft and the shaft hole are in a tension state, which can not only prevent loosening but also prevent the pin shaft from rotating.

[0026] Installation process

[0027] After the pin shaft 1 passes through the shaft hole 3, the tension sleeve 2 is respectively sleeved on the outer sides of both ends of the pin shaft 1, gaskets 4 are placed at both ends of the pin shaft 1, and by tightening the screw 5 with the screw hole 6 of the pin shaft 1, after the screw 5 is tightened, during the working process, the tension sleeve 2 and the pin shaft 1 are mutually extruded, the tension sleeve 2 is expanded and keeps extruding the shaft hole 3, so that the contact surface between the tension sleeve 2 and the shaft hole 3 is increased, and the outer diameter of the tension sleeve 2 also becomes larger accordingly. Then the tension sleeve 2 and the shaft hole 3 and the pin shaft 1 diameters are in a tension state, generating a huge tension force, thus achieving the effects of anti-loosening and anti-rotation.

[0028] The above is only the preferred embodiment of the utility model. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the utility model, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the utility model.

Claims

1. A pin anti-loosening and stopping device, characterized in that: The invention comprises a pin shaft (1), two tension sleeves (2), an axial hole (3) and two screws (5); the pin shaft (1) is arranged through the axial hole (3); the two tension sleeves (2) are respectively arranged on the outer sides of the two ends of the pin shaft (1); and the two screws (5) are respectively arranged on the two ends of the pin shaft (1).

2. The anti-loosening and stopping device of a pin shaft according to claim 1, characterized in that: Both ends of the pin shaft (1) are respectively arranged as conical structures.

3. The anti-loosening and stopping device of a pin shaft according to claim 1, characterized in that: Screw holes (6) are respectively arranged inside the two ends of the pin shaft (1), and the screws (5) are screwed and arranged with the screw holes (6) of the pin shaft (1).

4. The anti-loosening and stopping device for a pin shaft according to claim 1, characterized in that: A gasket (4) is arranged between the screw (5) and the pin shaft (1).

5. The anti-loosening and stopping device of a pin shaft according to claim 1, characterized in that: The tension sleeve (2) is sleeved on the pin shaft (1), and the tension sleeve (2) is arranged in the shaft hole (3).

6. The anti-loosening and stopping device for a pin shaft according to claim 1, characterized in that: The inner hole of the tension sleeve (2) is arranged to be a conical structure.

7. The anti-loosening and stopping device for a pin shaft according to claim 1, characterized in that: The tension sleeve (2) is provided with a tension sleeve notch (7).

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