Compression locking type bolt and nut

Abstract

The utility model relates to the technical field of bolts and nuts, in particular to a compression locking type bolt and nut which comprises a bolt, a first nut and a second nut, the first nut and the second nut are arranged outside the bolt in a sleeved mode, and the bolt is in threaded fit with the first nut and the second nut. A groove part and movable grooves located in the two sides of the groove part are formed in the top of the interior of the second nut, and locking assemblies are arranged in the movable grooves. The protruding part of the first nut is inserted into the groove part of the second nut, elastic force acts on the locking rod through the locking spring, one end of the locking rod can be inserted into the locking hole of the protruding part, rotation of the first nut can be limited, and the second nut is prevented from loosening.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts and nuts, in particular to a compression-preventing bolt and nut. Background Art

[0002] Bolts and nuts are commonly used connection and fixing structures in mechanical parts and daily life. However, the existing bolts and nuts will loosen on their own due to vibration and other reasons during use. In order to ensure the safety of equipment installation, a compression-type anti-loosening bolt and nut can be used.

[0003] In the prior art, a self-locking double-nut anti-loosening bolt structure with a publication number of CN216407446U includes a forward threaded section, a reverse threaded section, a non-threaded transition section, a forward nut, a reverse nut, and a concave pad. The forward threaded section is located at the head of the structure, the reverse threaded section is located at the tail of the structure, the non-threaded transition section is located between the forward threaded section and the reverse threaded section, the forward nut and the reverse nut are respectively arranged on the forward threaded section and the reverse threaded section, the concave pad is arranged on the non-threaded transition section, and the forward nut and the concave pad, as well as the reverse nut and the concave pad, are tightly fitted. When the bolt tends to loosen, the forward nut will have a tendency to rotate outward in the opposite direction, thereby squeezing the concave pad to deform it, and the reverse nut is driven to rotate in the opposite direction by the rebound force and friction force of the concave pad. The reverse rotation will generate a tightening trend due to the reverse rotation, and will be transmitted to the forward nut again through the concave pad, thereby achieving the purpose of self-locking and effectively limiting further loosening of the bolt.

[0004] Generally, the anti-loosening bolt structure adopts two nuts, which rotate in opposite directions. It is easy to be restricted by the special setting of the bolt. The thread on the bolt adopts a bidirectional method, which has a relatively poor versatility. To solve this problem, we propose a compression anti-loosening bolt nut. Summary of the Invention

[0005] The purpose of the utility model is to provide a compression-preventing bolt and nut to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A compression-locking and anti-loosening bolt and nut, comprising:

[0008] A bolt, and a first nut and a second nut sleeved on the outside of the bolt, wherein the bolt is threadably engaged with the first nut and the second nut;

[0009] A groove portion and movable grooves on both sides of the groove portion are provided at the top of the second nut, and a locking assembly is provided inside the movable groove.

[0010] Preferably, the raised portion of the first nut is cylindrical.

[0011] Preferably, locking holes are provided on both sides of the raised portion.

[0012] Preferably, the raised portion of the first nut is matched with the groove portion of the second nut.

[0013] Preferably, the locking assembly includes a locking rod, and the locking rod is fixedly connected to a push block.

[0014] Preferably, one end of the locking rod is connected to a locking spring.

[0015] Preferably, one end of the locking rod is elastically connected to the second nut via a locking spring, and the other end corresponds to the locking hole and is partially adapted thereto.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The utility model inserts the raised portion of the first nut into the groove portion of the second nut, and applies elastic force to the locking rod through the locking spring. One end of the locking rod can be inserted into the locking hole of the raised portion, which can be used to limit the rotation of the first nut and prevent the second nut from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the connection structure between the locking rod and the locking spring of the utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the second nut of the present invention.

[0022] In the picture:

[0023] Bolt 1,

[0024] First nut 2, raised portion 21, locking hole 22,

[0025] The second nut 3 , the groove portion 31 , the movable groove 32 , the locking rod 33 , the push block 34 , and the locking spring 35 . DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1-4 , a compression-locking and anti-loosening bolt and nut, comprising:

[0028] A bolt 1, and a first nut 2 and a second nut 3 sleeved on the outside of the bolt 1, wherein the bolt 1 is threadedly engaged with the first nut 2 and the second nut 3, and the raised portion 21 of the first nut 2 is cylindrical;

[0029] A groove portion 31 and movable grooves 32 on both sides of the groove portion 31 are formed at the top of the second nut 3 . A locking assembly is provided inside the movable groove 32 .

[0030] In this embodiment, by rotating the first nut 2 on the bolt 1, the raised portion 21 of the first nut 2 can be inserted into the groove portion 31 of the second nut 3, and the first nut 2 can be pressed against the second nut 3, and the first nut 2 can be connected to the second nut 3 through a locking assembly to limit the positions of the first nut 2 and the second nut 3.

[0031] Preferably, locking holes 22 are provided on both sides of the protrusion 21, the protrusion 21 of the first nut 2 is adapted to the groove portion 31 of the second nut 3, and the locking assembly includes a locking rod 33, the locking rod 33 is fixedly connected to the push block 34, one end of the locking rod 33 is connected to the locking spring 35, one end of the locking rod 33 is elastically connected to the second nut 3 through the locking spring 35, and the other end corresponds to the locking hole 22 and is partially adapted.

[0032] In this embodiment, the raised portion 21 of the first nut 2 is inserted into the groove portion 31 of the second nut 3, and the locking spring 35 applies elastic force to the locking rod 33. One end of the locking rod 33 can be inserted into the locking hole 22 of the raised portion 21, which can be used to limit the rotation of the first nut 2 and prevent the second nut 3 from loosening.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A compression-locking bolt and nut, characterized in that: include: A bolt (1), and a first nut (2) and a second nut (3) sleeved on the outside of the bolt (1), wherein the bolt (1) is threadably engaged with the first nut (2) and the second nut (3); A groove portion (31) and movable grooves (32) are provided at the top of the interior of the second nut (3), and a locking assembly is provided inside the movable groove (32).

2. A compression-locking bolt and nut according to claim 1, characterized in that: The raised portion (21) of the first nut (2) is cylindrical.

3. A compression-locking bolt and nut according to claim 2, characterized in that: Locking holes (22) are provided on both sides of the raised portion (21).

4. A compression-locking bolt and nut according to claim 3, characterized in that: The raised portion (21) of the first nut (2) is adapted to the recessed portion (31) of the second nut (3).

5. The compression-locking and anti-loosening bolt and nut according to claim 1, characterized in that: The locking assembly comprises a locking rod (33), and the locking rod (33) is fixedly connected to a push block (34).

6. The compression-locking and anti-loosening bolt and nut according to claim 5, characterized in that: One end of the locking rod (33) is connected to a locking spring (35).

7. The compression-locking and anti-loosening bolt and nut according to claim 6, characterized in that: One end of the locking rod (33) is elastically connected to the second nut (3) via a locking spring (35), and the other end corresponds to the locking hole (22) and is partially adapted thereto.

Images