Self-locking blind hole nut

Abstract

The utility model discloses a self-locking blind hole nut which comprises a nut body, a pressing block is arranged at the position, close to the bottom, of the center in the nut body, a first spring is fixedly connected to the bottom of the pressing block, and second hinge frames are fixedly connected to the positions, close to the bottom, of the two sides in the nut body. Prying rods are hinged to the opposite sides of the two second hinge frames correspondingly, and first hinge frames are fixedly connected to the two sides of the bottom of the pressing block correspondingly. According to the self-locking blind hole nut, through the design of a pressing block, a first spring, prying rods, a first hinge frame, a second hinge frame, a locking block, a sliding groove, a sliding block and a second spring, when a bolt is screwed into a nut body, the bottom of the bolt can press the pressing block to move downwards, and the action immediately triggers the pressing block to press the two prying rods to move relatively through the first hinge frame; the movement of the prizing rod further pushes the two locking blocks to move relatively along the sliding grooves, so that the locking grooves in the two locking blocks tightly clamp threads on the bolt.

Description

TECHNICAL FIELD

[0001] The utility model relates to blind hole nut technical field, concretely is a self -locking blind hole nut. BACKGROUND

[0002] Blind hole nut, also known as blind nut, is a kind of nut with special structure, its main feature is that the central part is hollow, and the bottom is designed with small column for clamping. This kind of nut can be installed through internal thread and bolt or screw cooperation in the area that cannot be reached or space limited, and the tail is cut off to form a blind hole through cutting or bending process, so it is unnecessary to be fixed on the opposite side. Blind hole nut is widely used in the fields of automobile, electronic equipment, robot, ship, elevator and the like.

[0003] The existing blind hole nut has a significant defect in design, that is, they lack reliable bolt locking function, although blind hole nut can provide connection solution in space limited occasion, but its locking mechanism is often not stable enough, cannot ensure that the bolt will not loosen when used for a long time or subjected to vibration, impact and other external forces, and this deficiency can lead to instability between connecting pieces, and even cause safety accidents. Therefore, we propose a self-locking blind hole nut. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a self-locking blind hole nut to solve the problem that the existing blind hole nut cannot ensure that the bolt will not loosen when used for a long time or subjected to vibration, impact and other external forces in the above background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: a self-locking blind hole nut, comprising a nut body, a pressing block is arranged at the bottom of the inner center of the nut body, a first spring is fixedly connected to the bottom of the pressing block, second hinge frames are fixedly connected to both sides of the nut body at the bottom, pry levers are hingedly connected to the opposite sides of the two second hinge frames, first hinge frames are fixedly connected to both sides of the bottom of the pressing block, locking blocks are arranged at the opposite ends of the two pry levers, sliding blocks are fixedly connected to one side of the top of the locking blocks, sliding grooves are formed in the inner wall of the nut body and correspond to the upper ends of the two sliding blocks, and second springs are fixedly connected to one side of the inner wall of the sliding grooves.

[0006] Compared with the prior art, the utility model has the advantages of:

[0007] The self-locking blind hole nut, through the design of the pressing block, the first spring, the prying rod, the first hinged frame, the second hinged frame, the locking block, the sliding groove, the sliding block and the second spring, when the bolt is screwed into the nut body, the bottom of the bolt presses the pressing block to move downwards, which triggers the pressing block to press the two prying rods to move relatively through the first hinged frame, the movement of the prying rods further pushes the two locking blocks to move relatively along the sliding groove, so that the locking grooves on the two locking blocks tightly clamp the threads on the bolt, not only realizing the automatic locking of the blind hole nut on the bolt, but also significantly improving the stability and safety of the connection, even in harsh environments such as vibration or impact, the stability of the connection can be maintained. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is a structural schematic view of the utility model;

[0009] Figure 2 It is a structural schematic view of the utility model Figure 1 It is a partial enlarged view of A in the utility model;

[0010] Figure 3 It is a structural perspective view of the locking block of the utility model;

[0011] Figure 4 It is a structural front view of the utility model.

[0012] In the drawing: 1, nut body; 2, nut head; 3, screw groove; 4, pressing block; 5, first spring; 6, prying rod; 7, first hinged frame; 8, second hinged frame; 9, locking block; 10, locking groove; 11, sliding groove; 12, sliding block; 13, second spring. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0014] Please refer to Figures 1-4The utility model provides a technical scheme: A self-locking blind hole nut, including nut body 1, the bottom position of the center in nut body 1 is provided with pressure block 4, the bottom fixedly connected with first spring 5 of pressure block 4, the bottom position of both sides in nut body 1 is fixedly connected with second hinged frame 8, the opposite side of two second hinged frames 8 is all hinged with pry lever 6, the both sides of pressure block 4 bottom are all fixedly connected with first hinged frame 7, the opposite end of two pry levers 6 is all provided with locking block 9, the top side fixedly connected with sliding block 12 of locking block 9, the upper end of the inner wall of nut body 1 is all provided with slide groove 11 with two sliding blocks 12 respectively, the inner wall of slide groove 11 is fixedly connected with second spring 13 on one side.

[0015] The upper end of nut body 1 is fixedly connected with nut head 2, and the inner wall of nut body 1 is provided with screw groove 3, and the whole blind hole nut is formed.

[0016] The number of first spring 5 is four, and the bottom of four first springs 5 is fixedly connected with the inner bottom of nut body 1, provides upward elastic force, so that pressure block 4 can restore to the initial position when not being subjected to external force, provides power for the reset of pry lever 6 and locking block 9.

[0017] One end of two pry levers 6 is hinged with the opposite side of two first hinged frames 7 respectively, so that pressure block 4 can drive pry lever 6 to rotate when being pressed down, to move locking block 9.

[0018] Two locking blocks 9 are symmetrically arranged, and locking groove 10 is formed in the opposite side of two locking blocks 9, the thread of bolt is clamped through locking groove 10, and the automatic locking function of blind hole nut is realized.

[0019] The upper end of sliding block 12 extends to the inside of slide groove 11 and is slidably connected with the inner wall of slide groove 11, one end of second spring 13 is fixedly connected with one side of sliding block 12, and the action is to provide reset elastic force, so that locking block 9 can restore to the initial position when not being subjected to external force, the opening state of locking groove 10 is kept, and the rotation of bolt is facilitated.

[0020] Working principle: when the bolt is screwed into the screw groove 3 of the nut body 1, the bottom of the bolt first contacts the pressing block 4, and as the bolt continues to screw in, the pressing block 4 is subjected to downward pressure and compresses the four first springs 5 at the bottom of the pressing block 4. The elastic force of the four springs will make the pressing block 4 return to the initial position when it is not subjected to external force, but at this moment, they are compressed and store energy. The downward movement of the pressing block 4 simultaneously drives the first hinged frame 7 on both sides of its bottom. Since the first hinged frame 7 is hingedly connected to one end of the prying rod 6, the downward movement of the pressing block 4 will make the prying rod 6 rotate around the second hinged frame 8. This rotation in turn pushes the locking block 9 to move inward along the sliding groove 11. The movement of the locking block 9 is achieved by the sliding of the sliding block 12 in the sliding groove 11. One side of the sliding block 12 is fixedly connected with the second spring 13. When the locking block 9 is pushed by the prying rod 6, they will compress the second spring 13 and move inward until the locking slot 10 contacts and clamps the threads of the bolt. Once the locking slot 10 clamps the threads of the bolt, the locking block 9 will tightly clamp the bolt due to the restoring force of the second spring 13 and the elastic force of the first spring 5, realizing the automatic locking function of the blind hole nut. This design ensures that the nut can maintain stable connection with the bolt even in harsh environments such as vibration or impact.

[0021] In summary: the self-locking blind hole nut, through the design of the pressing block 4, the first spring 5, the prying rod 6, the first hinged frame 7, the second hinged frame 8, the locking block 9, the sliding groove 11, the sliding block 12 and the second spring 13, when the bolt is screwed into the nut body 1, the bottom of the bolt will press the pressing block 4 to move downward, which in turn triggers the pressing block 4 to press the two prying rods 6 to move relatively through the first hinged frame 7. The movement of the prying rod 6 further pushes the two locking blocks 9 to move relatively along the sliding groove 11, making the locking slots 10 on the two locking blocks 9 tightly clamp the threads on the bolt, not only realizing the automatic locking of the blind hole nut on the bolt, but also significantly improving the stability and safety of the connection. Even in harsh environments such as vibration or impact, the stability of the connection can be maintained.

[0022] It should be noted that in this text, relational terms such as first and second are used only to distinguish one entity or action from another, and do not necessarily require or imply any such actual relationship or order between the entities or actions. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0023] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-locking blind nut comprising a nut body (1), characterized in that: The nut body (1) is provided with a pressing block (4) in the center of the bottom, the bottom of the pressing block (4) is fixedly connected with a first spring (5), both sides of the nut body (1) are fixedly connected with a second hinged frame (8) at the bottom, the opposite side of the two second hinged frames (8) is hingedly connected with a prying rod (6), the bottom of the pressing block (4) is fixedly connected with a first hinged frame (7), the opposite end of the two prying rods (6) is provided with a locking block (9), one side of the top of the locking block (9) is fixedly connected with a sliding block (12), the inner wall of the nut body (1) is provided with a sliding groove (11) corresponding to the upper end of the two sliding blocks (12), one side of the inner wall of the sliding groove (11) is fixedly connected with a second spring (13).

2. A self-locking blind nut according to claim 1, characterized in that: The upper end of the nut body (1) is fixedly connected with a nut head (2), and the inner wall of the nut body (1) is provided with a screw groove (3).

3. A self-locking blind nut according to claim 1, wherein: The number of the first spring (5) is four, and the bottom of the four first springs (5) is fixedly connected with the inner bottom of the nut body (1).

4. The self-locking blind-nut of claim 1, wherein: One end of the two prying rods (6) is hingedly connected with the opposite side of the two first hinged frames (7) respectively.

5. The self-locking blind-nut of claim 1, wherein: The two locking blocks (9) are symmetrically arranged, and the opposite side of the two locking blocks (9) is provided with a locking groove (10).

6. A self-locking blind-nut according to claim 1, wherein: The upper end of the sliding block (12) extends to the inside of the sliding groove (11) and is slidably connected with the inner wall of the sliding groove (11), and one side of the second spring (13) is fixedly connected with the sliding block (12).

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