Lock bolt

Abstract

The utility model provides a lock bolt which comprises a screw rod, a nut and a fastener, the nut is in threaded connection with the screw rod, the fastener is arranged on one side of the nut far away from a screw cap of the screw rod, a fixing cavity convenient for embedding the fastener is arranged on the side wall of the nut, and the external size of the fastener is slightly larger than the size of the fixing cavity. The internal size of the fastening piece is matched with the outer diameter of threads of the screw rod, and a plurality of teeth are arranged in the fastening piece. According to the lock bolt provided by the utility model, a gasket is replaced by the fastener, the fastener is clamped into the fixing cavity of the nut, the fastener is in interference fit with the fixing cavity and is connected with the nut into a whole, and the threads on the screw rod are engaged by the teeth in the fastener, so that the nut is prevented from loosening on the screw rod.

Description

Technical Field

[0001] The utility model relates to the technical field of connecting bolts, in particular to an anti-loosening bolt. Background Art

[0002] The anti-loosening performance of bolts has always been an important research indicator in the bolt field. Bolts are usually composed of screws, nuts and washers. Washers provide elastic force to tighten the nuts to prevent them from loosening. However, when the bolts are in a vibrating environment, the nuts may still loosen, causing the nuts to rotate out of the bolts, resulting in equipment failure. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in order to overcome the deficiency in the prior art that when the bolt is in a vibrating environment, the nut may still become loose, so that the nut rotates out of the bolt, thereby causing equipment failure, the utility model provides an anti-loosening bolt.

[0004] The utility model adopts the following technical solution to solve the technical problem: an anti-loosening bolt, comprising a screw rod, a nut and a fastener, wherein the nut is threadedly connected to the screw rod, the fastener is arranged on a side of the nut away from the screw rod nut, a fixing cavity is arranged on the side wall of the nut for facilitating the embedding of the fastener, the outer dimension of the fastener is slightly larger than the dimension of the fixing cavity, the inner dimension of the fastener is adapted to the outer diameter of the screw rod thread, and a plurality of teeth are arranged inside the fastener.

[0005] The screw is passed through the connecting holes of two or more parts to be connected, and the connecting parts are fixed by the cooperation of the nut and the screw; the fastener is moved along the screw to the opening of the fixing cavity. Since the size of the fastener is slightly larger than the size of the fixing cavity, it is necessary to use pliers or a hammer to clamp the fastener into the fixing cavity. After the fastener is clamped into the fixing cavity, the outer side and the fixing cavity have an interference fit, and the inner side holds the screw through the teeth. The teeth are deformed and locked with the screw threads to prevent the nut from loosening.

[0006] Furthermore, in order to facilitate the fastener to be inserted into the fixing cavity, the fastener is an elastic member, and the fastener is in the form of a ring with a notch.

[0007] Furthermore, in order to facilitate the fastener to be inserted into the fixing cavity, the fastener is an elastic member, and the fastener is in a U-shape with an opening.

[0008] Furthermore, in order to facilitate the fastener to be inserted into the fixing cavity, the fastener is provided with a chamfer that matches the fixing cavity.

[0009] Furthermore, in order to prevent the fastener from rotating axially in the fixing cavity, a plurality of grooves are provided on the side wall of the fixing cavity, and a protrusion cooperating with the grooves is provided on the side wall of the fastener.

[0010] Furthermore, a hook groove is provided at the end of the fastener notch. When removing the nut, a tool such as a screwdriver hook is inserted into the groove to tilt the fastener out of the fixing cavity, thereby facilitating the removal of the nut from the screw rod.

[0011] The beneficial effect of the utility model is that the utility model provides an anti-loosening bolt, which adopts a fastener instead of a gasket, and the fastener is stuck in the fixing cavity of the nut. The fastener and the fixing cavity are connected to the nut as a whole through interference fit, and the threads on the screw rod are bitten by the teeth in the fastener to prevent the nut from loosening on the screw rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 is a structural schematic diagram of embodiment 1;

[0014] Figure 2 is a schematic structural diagram of the fastener in the first embodiment;

[0015] Figure 3 is a structural diagram of Embodiment 2;

[0016] Figure 4 It is a schematic diagram of the fastener structure in the second embodiment.

[0017] In the figure: 1, screw, 2, nut, 21, fixing cavity, 22, groove, 3, fastener, 31, teeth, 32, hook groove, 33, protrusion. DETAILED DESCRIPTION

[0018] Now the utility model is described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the utility model in a schematic manner, so it only shows the components related to the utility model.

[0019] Embodiment 1:

[0020] like Figure 1 , 2 As shown, a locking bolt of the utility model comprises a screw rod 1, a nut 2 and a fastener 3, wherein the nut 2 is threadedly connected to the screw rod 1, the fastener 3 is arranged on a side of the nut 2 away from the nut cap of the screw rod 1, a fixing cavity 21 is provided on the side wall of the nut 2 for facilitating the embedding of the fastener 3, the outer dimension of the fastener 3 is slightly larger than the dimension of the fixing cavity 21, the inner dimension of the fastener 3 is adapted to the outer diameter of the thread of the screw rod 1, and a plurality of teeth 31 are provided inside the fastener 3.

[0021] The fastener 3 is an elastic member, and is in the form of a ring with a notch. A hook groove 32 is provided at the end of the notch of the fastener 3.

[0022] The fastener 3 is provided with a chamfer that matches the fixing cavity 21 .

[0023] A plurality of grooves 22 are provided on the side wall of the fixing cavity 21 , and a protrusion 33 matching with the grooves 22 is provided on the side wall of the fastener 3 .

[0024] Working process:

[0025] The screw rod 1 passes through the connection holes of two or more parts to be connected, and the nut 2 cooperates with the screw rod 1 to fix the connecting parts. The fastener 3 is moved along the screw rod 1 to the opening of the fixing cavity 21, and the fastener 3 is clamped into the fixing cavity 21 with a vise. After the fastener 3 is inserted into the fixing cavity 21, the outer side is interference-fitted with the fixing cavity 21, and the protrusion 33 cooperates with the groove 22 to prevent the fastener 3 and the nut 2 from rotating axially. The inner side is tightly held on the screw rod 1 by the teeth 31, and the teeth 31 are deformed and locked with the screw rod 1 thread to prevent the nut 2 from loosening. The hardness of the fastener 3 is less than that of the screw rod 1, so when the teeth 31 cooperate with the screw rod 1 thread, the teeth 31 are deformed, and the screw rod 1 thread will not be worn. As a disposable consumable, the fastener 3 ensures that the nut 2 and the screw rod 1 will not loosen each time it is used.

[0026] Embodiment 2:

[0027] like Figure 3 , 4 As shown, the difference between this embodiment and the first embodiment is that the fastener 3 is an elastic member, and the fastener 3 is in a U-shape with an opening.

[0028] Directions and references (e.g., up, down, left, right, etc.) in the present invention may only be used to assist in the description of features in the accompanying drawings. Therefore, the following detailed description is not to be taken in a limiting sense, and the scope of the subject matter claimed is limited only by the attached claims and their equivalents.

[0029] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the scope of the utility model through the above description. The technical scope of this utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A lock - preventing bolt, characterized in that: It includes a screw rod (1), a nut (2) and a fastener (3). The nut (2) is in threaded connection with the screw rod (1). The fastener (3) is arranged on the side of the nut (2) away from the nut of the screw rod (1). A fixing cavity (21) for facilitating the installation of the fastener (3) is provided on the side wall of the nut (2). The external dimension of the fastener (3) is slightly larger than the dimension of the fixing cavity (21). The internal dimension of the fastener (3) is adapted to the external thread diameter of the screw rod (1). A plurality of teeth (31) are provided inside the fastener (3).

2. The lock - preventing bolt according to claim 1, characterized in that: The fastener (3) is an elastic member, and the fastener (3) is in the form of a ring with a notch.

3. The anti-loosening bolt according to claim 1, wherein: The fastener (3) is an elastic member, and the fastener (3) is in the form of a U shape with an opening.

4. A lock - preventing bolt according to any one of claims 1 - 3, characterized in that: A guide angle for cooperating with the fixing cavity (21) is provided on the fastener (3).

5. The locknut bolt according to claim 4, characterized in that: A plurality of grooves (22) are provided on the side wall of the fixing cavity (21), and protrusions (33) for cooperating with the grooves (22) are provided on the side wall of the fastener (3).

6. The lock - preventing bolt according to claim 2, characterized in that: A hook groove (32) is provided at the end of the notch of the fastener (3).

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