Self-locking nut

Abstract

The utility model relates to the technical field of nuts, in particular to a self-locking nut. According to the technical scheme, the device comprises a button fork, an inner nut and a protective sleeve, insertion openings are formed in the two sides of the upper end face of the protective sleeve, positioning holes are formed in the outer side of the protective sleeve in an annular array mode, positioning rods are inserted into the positioning holes, the inner nut is rotationally installed in the protective sleeve, and pressing openings are formed in the two sides of the upper end face of the inner nut. A pressing rod is fixed to the outer end of the button fork, a handle is fixed to the middle of one side of the button fork, the outer side of the upper end of a positioning rod is sleeved with a rubber sleeve, the rubber sleeve is located in a positioning hole, a limiting ring is fixed to the inner side of a protection sleeve, a limiting groove is formed in the outer side of an inner nut, and the limiting ring is located in the limiting groove. The utility model has the advantages of external protection, guarantee of service life, positioning deviation prevention, and guarantee of stable fixation.

Description

Technical Field

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

[0002] Locking nuts are widely used in machinery and other industries. Their working principle is to use the friction between the nut and the bolt for self-locking. However, the reliability of this self-locking will be reduced under dynamic loads. In some important occasions, we will take some anti-loosening measures to ensure the reliability of nut locking.

[0003] The existing locking nut is locked directly by friction, and the outer part of the nut has no protective structure, which is easy to be corroded and damaged, thus shortening the service life; and the existing locking nut is locked by friction, which is easy to loosen, thus shortening the fixing quality. Utility Model Content

[0004] The purpose of the utility model is to provide a self-locking nut with external protection, ensuring the service life and positioning anti-deviation, ensuring stable fixation, and solving the problems in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a self-locking nut, comprising a button fork, an inner nut and a protective sleeve, wherein both sides of the upper end surface of the protective sleeve are provided with sockets, a circular array of positioning holes is provided on the outer side of the protective sleeve, and a positioning rod is inserted into the positioning hole, the inner nut is rotatably installed inside the protective sleeve, both sides of the upper end surface of the inner nut are provided with pressure openings, a pressure rod is fixed to the outer end of the button fork, and a handle is fixed in the middle of one side of the button fork.

[0006] When using a self-locking nut in the technical solution, during installation, the inner nut on the inner side of the protective sleeve is connected to the top of the screw rod, and then the protective sleeve is rotated to make its socket connect with the pressure mouth. Then the staff holds the handle to insert the pressure rod at the outer end of the button fork from the socket into the pressure mouth, and then rotates the button fork to drive the inner nut and the protective sleeve to rotate synchronously. At this time, the inner nut thread is installed on the screw rod, and the top of the screw passes through the rod mouth. After the installation is completed, the inner nut fits in the fixed position, and then the button fork is removed, and the protective sleeve is manually rotated to make its positioning hole connect with the hole on the installation panel. Then the positioning rod is passed through the positioning hole and the lower end is connected into the hole to complete the connection and positioning.

[0007] Preferably, a rubber sleeve is sleeved on the outer side of the upper end of the positioning rod, and the rubber sleeve is located inside the positioning hole. The rubber sleeve generates resistance at the position where the positioning rod is connected to the positioning hole, which is convenient for assembly.

[0008] Preferably, the positions of the socket and the pressure port correspond to each other, and the pressure rod passes through the socket and is plugged into the corresponding pressure port. The socket and the pressure port are connected in series through the pressure rod.

[0009] Preferably, a limiting ring is fixed on the inner side of the protective sleeve, a limiting groove is provided on the outer side of the inner nut, and the limiting ring is located in the limiting groove. The limiting ring cooperates with the limiting groove to enable the inner nut to be rotatably installed in the protective sleeve.

[0010] Preferably, the button fork is designed to be arc-shaped, and the button fork corresponds to the center of the inner nut. The button fork is adapted to the center of the inner nut, which facilitates manual rotation.

[0011] Preferably, the protective sleeve is made of stainless steel, and the height of the protective sleeve matches the height of the inner nut. The material is rust-proof to ensure external protection performance.

[0012] Preferably, the outer side of the handle is sleeved with an anti-slip sleeve, and the length of the handle is ergonomically designed. The protective sleeve increases resistance and facilitates manual operation.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: during installation, the inner nut on the inner side of the protective sleeve is connected to the top of the screw rod, and then the protective sleeve is rotated to make its socket connect with the pressure mouth. Then the staff holds the handle to insert the pressure rod at the outer end of the button fork from the socket to the pressure mouth, and then rotates the button fork to drive the inner nut and the protective sleeve to rotate synchronously. At this time, the inner nut is threadedly installed on the screw rod, and the top of the screw passes through the rod mouth. After installation is completed, the inner nut fits in the fixed position, and then the button fork is removed, and the protective sleeve is manually rotated to make its positioning hole connect with the hole on the installation panel. Then the positioning rod is passed through the positioning hole and the lower end thread is installed in the hole to complete the connection and positioning. The device has a simple structure and is easy to operate. The internal inner nut is protected by the protective sleeve to avoid oxidation and rusting due to exposure to the air, thereby ensuring its service life. At the same time, after the protective sleeve is connected to the installation panel through the positioning rod, the protective sleeve is positioned and cannot be deflected or displaced longitudinally outward, and the inner nut threaded connection cannot be displaced longitudinally, thereby achieving multiple locking and ensuring the stability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the protective cover of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the inner nut of the utility model;

[0017] Figure 4 This is a schematic diagram of the button fork structure of the utility model.

[0018] In the figure: 1. handle; 2. button fork; 3. inner nut; 4. protective cover; 5. positioning rod; 6. rod mouth; 7. positioning hole; 8. socket; 9. limiting groove; 10. pressure mouth; 11. pressure rod. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Embodiment 1

[0021] See also Figures 1 to 4 The utility model provides an embodiment: a self-locking nut, comprising a button fork 2, an inner nut 3 and a protective sleeve 4, both sides of the upper end surface of the protective sleeve 4 are provided with sockets 8, the outer annular array of the protective sleeve 4 is provided with positioning holes 7, and a positioning rod 5 is inserted in the positioning hole 7, the upper end outer side of the positioning rod 5 is sleeved with a rubber sleeve, and the rubber sleeve is located inside the positioning hole 7, and the rubber sleeve is used to generate resistance at the position where the positioning rod 5 connects to the positioning hole 7, which is convenient for assembly, the socket 8 corresponds to the position of the pressure port 10, and the pressure rod 11 passes through the socket 8 and is inserted into the corresponding pressure port 10, and the socket 8 and the pressure port 10 are connected in series through the pressure rod 11, a limiting ring is fixed on the inner side of the protective sleeve 4, a limiting groove 9 is provided on the outer side of the inner nut 3, and the limiting ring is located in the limiting groove 9, and the limiting ring cooperates with the limiting groove 9 to make the inner nut 3 rotatably installed in the protective sleeve 4.

[0022] Embodiment 2

[0023] See also Figures 1 to 4 The utility model provides an embodiment: a self-locking nut, comprising a torsion fork 2, an inner nut 3 and a protective sleeve 4, the inner nut 3 is rotatably mounted inside the protective sleeve 4, and pressure openings 10 are provided on both sides of the upper end surface of the inner nut 3, a pressure rod 11 is fixed to the outer end of the torsion fork 2, and a handle 1 is fixed to the middle of one side of the torsion fork 2, the torsion fork 2 is designed in an arc shape, and the torsion fork 2 corresponds to the center of the circle of the inner nut 3, and the torsion fork 2 is adapted to the center of the circle of the inner nut 3, so that manual rotation operation is convenient, the protective sleeve 4 is composed of stainless steel material, the height of the protective sleeve 4 is adapted to the height of the inner nut 3, and rust prevention is achieved through the material to ensure external protection performance, the outer side of the handle 1 is sleeved with an anti-slip sleeve, the length of the handle 1 is ergonomically designed, and the protective sleeve increases resistance, which is convenient for manual operation.

[0024] During operation of the utility model, during installation, the inner nut 3 on the inner side of the protective sleeve 4 is docked with the top of the screw rod, and then the protective sleeve 4 is rotated to make its socket 8 dock with the pressure port 10. Then the staff holds the handle 1 to insert the pressure rod 11 at the outer end of the button fork 2 from the socket 8 to the pressure port 10, and then rotates the button fork 2 to drive the inner nut 3 and the protective sleeve 4 to rotate synchronously. At this time, the inner nut 3 is threadedly installed on the screw rod, and the top of the screw passes through the rod mouth 6. After the installation is completed, the inner nut 3 fits in the fixed position, and then the button fork 2 is removed, and the protective sleeve 4 is manually rotated to dock its positioning hole 7 with the hole on the installation panel. Then the positioning rod 5 is passed through the positioning hole 7 and the lower end is threadedly installed in the hole to complete the connection and positioning.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-locking nut, comprising a torsion fork (2), an inner nut (3) and a protective sleeve (4), characterized in that: The upper end surface of the protective sleeve (4) is provided with sockets (8) on both sides, the outer side of the protective sleeve (4) is provided with positioning holes (7) in an annular array, and positioning rods (5) are inserted into the positioning holes (7), the inner nut (3) is rotatably mounted inside the protective sleeve (4), the upper end surface of the inner nut (3) is provided with pressure holes (10) on both sides, the outer end of the button fork (2) is fixed with a pressure rod (11), and a handle (1) is fixed in the middle of one side of the button fork (2).

2. A self-locking nut according to claim 1, characterized in that: A rubber sleeve is sleeved on the outer side of the upper end of the positioning rod (5), and the rubber sleeve is located inside the positioning hole (7).

3. A self-locking nut according to claim 1, characterized in that: The positions of the socket (8) and the pressure port (10) correspond to each other, and the pressure rod (11) passes through the socket (8) and is inserted into the corresponding pressure port (10).

4. A self-locking nut according to claim 1, characterized in that: A limiting ring is fixed on the inner side of the protective sleeve (4), a limiting groove (9) is provided on the outer side of the inner nut (3), and the limiting ring is located in the limiting groove (9).

5. The self-locking nut according to claim 1, characterized in that: The button fork (2) is designed to be arc-shaped, and the button fork (2) corresponds to the center of the inner nut (3).

6. A self-locking nut according to claim 5, characterized in that: The protective sleeve (4) is made of stainless steel, and the height of the protective sleeve (4) is matched with the height of the inner nut (3).

7. The self-locking nut according to claim 1, characterized in that: The outer side of the handle (1) is sleeved with an anti-slip sleeve, and the length of the handle (1) is ergonomically designed.

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