Pre-tightening nut

Abstract

The utility model provides a pre-tightening nut, which relates to the technical field of nuts, and comprises a nut body, the bottom of the nut body is fixedly connected with a circular sleeve, and the inner surface wall of the circular sleeve is provided with a bearing. In the utility model, the circular sleeve with larger inner diameter and the anti-falling ring are additionally arranged at the bottom of the nut body to accommodate the annular rubber ring and the conical rubber ring with the inner diameter consistent with the inner diameter of the mounting hole in the surface of the nut body, so that when the nut body is mounted, the annular rubber ring and the conical rubber ring can generate larger friction force with the surface of a screw rod; due to the design of the bearing, when the nut body rotates and moves downwards, only extrusion force is generated on the annular rubber ring and the conical rubber ring, then the rubber rings are compressed after being extruded, the compressed annular rubber ring and the compressed conical rubber ring can generate pressure towards the periphery, and therefore the pre-tightening force of the nut body is improved, the loosening phenomenon is prevented, and the service life of the nut body is prolonged. Equipment faults are avoided, and potential safety hazards are eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of nuts, in particular to a pre-tightening nut. Background Art

[0002] A nut is a part that is screwed together with a bolt or screw to fasten things together. It is a component that all manufacturing machines must use. It is divided into several types according to the material, including carbon steel, stainless steel, and non-ferrous metals.

[0003] In mechanical equipment, the tightening of bolts is the key to ensure the normal operation of the equipment. However, when mechanical equipment vibrates during operation, conventional nuts tend to loosen and shift, resulting in loose connections, which can easily cause equipment failure and pose certain safety hazards. Therefore, in response to the above problems, we propose a new type of pre-tightened nut. Summary of the invention

[0004] The purpose of the utility model is to solve the problem in the prior art that when mechanical equipment vibrates during operation, conventional nuts tend to loosen and shift, resulting in loose connections, easily causing equipment failure, and posing certain safety hazards, and to propose a pre-tightening nut.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a pre-tightening nut, comprising a nut body, a circular sleeve fixedly connected to the bottom of the nut body, a bearing installed on the inner surface wall of the circular sleeve, an annular rubber ring placed on the inner top of the circular sleeve, a conical rubber ring connected to the bottom of the annular rubber ring, an arc angle is provided near the inner edge of the bottom of the conical rubber ring, the outer surface of the annular rubber ring is fitted with the inner surface wall of the bearing, an anti-slip ring is fixedly connected to the bottom of the circular sleeve, the top of the anti-slip ring is fitted with the bottom of the conical rubber ring, and an auxiliary mechanism is provided on the top of the nut body.

[0006] Preferably, a mounting hole is provided at the top center of the nut body, and a through hole is provided between the top and bottom of the circular sleeve.

[0007] Preferably, the inner diameter of the through hole is larger than the inner diameter of the mounting hole, and the inner diameters of the annular rubber ring and the conical rubber ring are consistent with the inner diameter of the mounting hole.

[0008] Preferably, a plurality of insertion holes are equidistantly formed on the top of the nut body near the edge, and a magnetic sheet is bonded and connected to the inner bottom of the insertion hole.

[0009] Preferably, the auxiliary mechanism comprises a connecting cover, and a plurality of positioning columns are fixedly connected to the bottom of the connecting cover at equal intervals near the edge.

[0010] Preferably, the positioning column and the insertion hole are plug-connected, and the bottom end and the magnetic sheet are magnetically connected.

[0011] Preferably, a butterfly-shaped piece is symmetrically fixedly connected to the top of the connection cover near the edge.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are:

[0013] 1. In the utility model, a circular sleeve with a larger inner diameter and an anti-slip ring are added at the bottom of the nut body to accommodate an annular rubber ring and a conical rubber ring whose inner diameters are consistent with the inner diameters of the mounting holes on the surface of the nut body. Therefore, when the nut body is installed, the annular rubber ring and the conical rubber ring will generate a large friction force with the surface of the screw, and the design of the bearing makes it possible for the nut body to rotate and move downward, only to generate an extrusion force on the annular rubber ring and the conical rubber ring, thereby causing the rubber ring to be compressed after being squeezed. The compressed annular rubber ring and the conical rubber ring will generate pressure around them, thereby increasing the pre-tightening force of the nut body, preventing loosening, avoiding equipment failure, and eliminating safety hazards.

[0014] 2. In the utility model, when the nut body is rotated for installation, the positioning column at the bottom of the connecting cover can be inserted into the socket at the top of the nut body. At this time, the magnetic sheet inside the socket will adsorb the positioning column so that the connecting cover is adsorbed on the top of the nut body. Then, the nut body can be easily rotated by the butterfly piece without using tools. In addition, the auxiliary mechanism is easy to disassemble and assemble and can be recycled. The design structure is simple and the convenience of use is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of a pre-tightening nut is provided for the utility model;

[0016] Figure 2 A cross-sectional view of a pre-tightening nut is provided for the utility model;

[0017] Figure 3 The utility model provides a schematic diagram of the nut body structure of a pre-tightening nut;

[0018] Figure 4 The utility model provides a schematic diagram of a circular sleeve structure of a pre-tightening nut.

[0019] Legend: 1. Nut body; 11. Socket; 12. Magnetic plate; 13. Mounting hole; 2. Auxiliary mechanism; 201. Connecting cover; 202. Positioning column; 203. Butterfly plate; 3. Round sleeve; 31. Bearing; 32. Anti-slip ring; 33. Through hole; 34. Annular rubber ring; 35. Conical rubber ring; 36. Arc angle. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0022] Embodiment 1, as Figure 1-Figure 4 As shown, the utility model provides a pre-tightening nut, including a nut body 1, a circular sleeve 3 is fixedly connected to the bottom of the nut body 1, a bearing 31 is installed on the inner surface wall of the circular sleeve 3, an annular rubber ring 34 is placed on the inner top of the circular sleeve 3, a conical rubber ring 35 is connected to the bottom of the annular rubber ring 34, an arc angle 36 is provided at the bottom of the conical rubber ring 35 near the inner edge, the outer surface of the annular rubber ring 34 is in contact with the inner surface wall of the bearing 31, an anti-slip ring 32 is fixedly connected to the bottom of the circular sleeve 3, the top of the anti-slip ring 32 is in contact with the bottom of the conical rubber ring 35, an auxiliary mechanism 2 is provided on the top of the nut body 1, a mounting hole 13 is opened at the top center of the nut body 1, a through hole 33 is provided between the top and the bottom of the circular sleeve 3, the inner diameter of the through hole 33 is larger than the inner diameter of the mounting hole 13, and the inner diameters of the annular rubber ring 34 and the conical rubber ring 35 are consistent with the inner diameter of the mounting hole 13.

[0023] The effect achieved by the entire embodiment 1 is that, when in use, the anti-slip ring 32 and the circular sleeve 3 at the bottom of the nut body 1 are sleeved on the outside of the screw, and then the nut body 1 is pressed down and rotated using a special tool. At this time, under the action of the threads of the mounting hole 13 and the surface of the screw, the nut body 1 will be threadedly connected with the screw, thereby playing a fixing role. During the process of the nut body 1 rotating and moving downward on the surface of the screw, the inner walls of the conical rubber ring 35 and the annular rubber ring 34 and the surface of the screw generate friction, and the conical rubber ring 35 and the annular rubber ring 34 form a rotational connection relationship between the bearing 31 and the circular sleeve 3. Therefore, the conical rubber ring 35 and the annular rubber ring 34 will not be affected during the rotation of the nut body 1 and the circular sleeve 3, but the conical rubber ring 35 and the annular rubber ring 3 will be affected when the nut body 1 and the circular sleeve 3 move downward. The conical rubber ring 34 causes an extrusion pressure. After being extruded, the conical rubber ring 35 and the annular rubber ring 34 will be deformed and located near the top of the circular sleeve 3. When the nut body 1 is installed, the compressed annular rubber ring 34 and the conical rubber ring 35 will generate pressure to the surrounding areas, thereby increasing the pre-tightening force of the nut body 1, preventing loosening, avoiding equipment failure, and eliminating safety hazards. The bottom thickness of the conical rubber ring 35 designed at the bottom of the annular rubber ring 34 is less than the thickness at the top. Therefore, the bottom strength of the conical rubber ring 35 is relatively small, and it is more likely to deform or even roll over, thereby effectively increasing the friction between the conical rubber ring 35 and the annular rubber ring 34 and the screw. The arc angle 36 designed at the bottom of the conical rubber ring 35 is mainly used to facilitate the conical rubber ring 35 to be inserted into the outside of the threaded rod.

[0024] Embodiment 2, as Figure 1-Figure 4 As shown, a plurality of insertion holes 11 are equidistantly provided at the top near the edge of the nut body 1, a magnetic sheet 12 is bonded to the inner bottom of the insertion hole 11, the auxiliary mechanism 2 comprises a connecting cover 201, a plurality of positioning posts 202 are equidistantly fixedly connected to the bottom near the edge of the connecting cover 201, the positioning posts 202 are plug-connected to the insertion hole 11 and the bottom ends are magnetically connected to the magnetic sheet 12, a butterfly sheet 203 is symmetrically fixedly connected to the top of the connecting cover 201 near the edge.

[0025] The effect achieved by the entire embodiment 2 is that when the nut body 1 is rotated for installation, the positioning column 202 at the bottom of the connecting cover 201 can be inserted into the socket 11 at the top of the nut body 1. At this time, the magnetic sheet 12 inside the socket 11 will adsorb the positioning column 202 so that the connecting cover 201 is adsorbed on the top of the nut body 1, and then the nut body 1 can be easily rotated without using tools through the butterfly piece 203. In addition, the auxiliary mechanism 2 is easy to disassemble and assemble and can be recycled. The design structure is simple and the convenience of use is improved.

[0026] Working principle: When in use, the anti-slip ring 32 and the circular sleeve 3 at the bottom of the nut body 1 are placed on the outside of the screw, and then the nut body 1 is pressed down and rotated using a special tool. At this time, under the action of the threads of the mounting hole 13 and the surface of the screw, the nut body 1 will be threadedly connected with the screw, thereby playing a fixing role. During the process of the nut body 1 rotating and moving downward on the surface of the screw, the inner walls of the conical rubber ring 35 and the annular rubber ring 34 and the surface of the screw generate friction, and the conical rubber ring 35 and the annular rubber ring 34 form a rotational connection relationship between the bearing 31 and the circular sleeve 3. Therefore, the conical rubber ring 35 and the annular rubber ring 34 will not be affected during the rotation of the nut body 1 and the circular sleeve 3, but the conical rubber ring 35 and the annular rubber ring 34 will be squeezed when the nut body 1 and the circular sleeve 3 move downward. The rubber ring 35 and the annular rubber ring 34 will be deformed and located near the top of the circular sleeve 3. When the nut body 1 is installed, the compressed annular rubber ring 34 and the conical rubber ring 35 will generate pressure to the surrounding areas, thereby increasing the pre-tightening force of the nut body 1, preventing loosening, avoiding equipment failure, and eliminating safety hazards. In addition, when rotating the nut body 1 for installation, the positioning column 202 at the bottom of the connecting cover 201 can be inserted into the socket 11 at the top of the nut body 1. At this time, the magnetic sheet 12 inside the socket 11 will adsorb the positioning column 202 so that the connecting cover 201 is adsorbed on the top of the nut body 1, and then the nut body 1 can be easily rotated without using tools through the butterfly sheet 203. In addition, the auxiliary mechanism 2 is easy to disassemble and assemble, and can be recycled. The design structure is simple and the convenience of use is improved.

[0027] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A pre-tightening nut, comprising a nut body (1), characterized in that: A circular sleeve (3) is fixedly connected to the bottom of the nut body (1), a bearing (31) is installed on the inner surface wall of the circular sleeve (3), an annular rubber ring (34) is placed on the inner top of the circular sleeve (3), a conical rubber ring (35) is connected to the bottom of the annular rubber ring (34), an arc angle (36) is provided at the bottom of the conical rubber ring (35) near the inner edge, the outer surface of the annular rubber ring (34) is in contact with the inner surface wall of the bearing (31), an anti-slip ring (32) is fixedly connected to the bottom of the circular sleeve (3), the top of the anti-slip ring (32) is in contact with the bottom of the conical rubber ring (35), and an auxiliary mechanism (2) is provided on the top of the nut body (1).

2. The pre-tightening nut according to claim 1, characterized in that: A mounting hole (13) is provided at the center of the top of the nut body (1), and a through hole (33) is provided between the top and bottom of the circular sleeve (3).

3. The pre-tightening nut according to claim 2, characterized in that: The inner diameter of the through hole (33) is greater than the inner diameter of the mounting hole (13), and the inner diameters of the annular rubber ring (34) and the conical rubber ring (35) are consistent with the inner diameter of the mounting hole (13).

4. The pre-tightening nut according to claim 3, characterized in that: A plurality of insertion holes (11) are equidistantly provided at the top of the nut body (1) near the edge, and a magnetic sheet (12) is bonded to the inner bottom of the insertion hole (11).

5. The pre-tightening nut according to claim 4, characterized in that: The auxiliary mechanism (2) comprises a connection cover (201), and a plurality of positioning columns (202) are fixedly connected to the bottom of the connection cover (201) near the edge at equal distances.

6. The pre-tightening nut according to claim 5, characterized in that: The positioning column (202) and the insertion hole (11) are connected in an inserting manner, and the bottom end and the magnetic sheet (12) are connected in a magnetic attraction manner.

7. The pre-tightening nut according to claim 6, characterized in that: A butterfly-shaped piece (203) is symmetrically fixedly connected to the top of the connection cover (201) near the edge.

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