Mechanical anti-loosening device

Abstract

The utility model provides a mechanical locking device which comprises a bolt and a gasket, the bolt comprises a nut and a screw rod, the gasket comprises a gasket front face and a gasket back face, a plurality of one-way tooth-shaped non-return protrusions are arranged on the gasket back face, and a plurality of non-return pressing teeth protruding out of the gasket face are arranged on the inner circle edge of the gasket front face. The anti-loosening and anti-falling bolt is suitable for a non-nut fixing scene, the non-return structures on the bolt and the gasket are matched with each other, the bolt is prevented from loosening in the reverse direction, the anti-loosening and anti-falling effect is achieved, and compared with the prior art, the anti-loosening and anti-falling bolt is simple and novel in structure, low in cost and high in practicability. No special installation tool is needed, operation is easy, convenient and rapid, the locking effect is high in vibration resistance, and practicability is very outstanding.

Description

Technical Field

[0001] This utility model relates to fastener technology, specifically a mechanical anti-loosening device. Background Technology

[0002] Fasteners are a common type of mechanical structure. They come in a wide variety of shapes and properties and can be found in various mechanical equipment and everyday items.

[0003] Threaded structures are a common type of connector and fastener. To prevent them from loosening due to vibration, various methods have been adopted in existing technologies, such as adding a special self-locking structure for nuts, adding retaining rings and pins, etc. The disadvantages of these methods are that they add multiple components, making the structure complex. Some also require special installation tools, making the operation cumbersome and inconvenient to use. Utility Model Content

[0004] The purpose of this invention is to overcome the defects of existing technologies and provide a mechanical anti-loosening device with a novel structure and excellent application effect.

[0005] This utility model is achieved through the following technology: a mechanical anti-loosening device, including a bolt and a washer. The bolt includes a nut and a screw. The washer includes a front side and a back side. The back side of the washer is provided with a plurality of one-way toothed anti-return protrusions. The inner edge of the front side of the washer is provided with a plurality of anti-return pressure teeth protruding from the washer surface. The anti-return pressure teeth are inclined from bottom to top towards the inner axis. The screw is provided with an anti-return groove, which corresponds to the anti-return pressure teeth.

[0006] Furthermore, the check groove on the screw is provided at least from the beginning of the screw at the root of the nut, and the longitudinal length of the check groove on the screw is not less than the height of the check pressure tooth.

[0007] Furthermore, the anti-reverse pressure teeth are conical protrusions or curved tooth-like plates that tilt inwards from the bottom to the center of the inner circular axis.

[0008] Furthermore, the plurality of unidirectional toothed check valve protrusions are arranged in a ring on the back of the gasket.

[0009] Furthermore, the anti-return protrusion is unidirectional ratchet-shaped.

[0010] This utility model's anti-loosening structure consists of a bolt and a washer, suitable for nutless fixing scenarios, mostly involving blind hole fixing on a substrate, where the fixing object is tapped into the substrate. Both the bolt and washer of this utility model are designed with a check valve. The back of the washer has a one-way toothed check valve protrusion. "One-way" specifically refers to the teeth being on the side opposite to the bolt tightening direction. When the bolt and washer tighten the fixing object onto the substrate, after tightening, the back of the washer fits tightly against the fixing object, and the one-way toothed check valve protrusion "locks" onto the surface of the fixing object, preventing reverse sliding; this is the "check valve" function. The gasket has check teeth on its front side, which are inclined inwards towards the inner axis. Correspondingly, there are check grooves on the screw. When the fixing object is tightened onto the fixing base, during the tightening process, on the one hand, the check protrusion on the back of the gasket is tightly engaged with the fixing object, preventing the gasket from rotating or sliding. On the other hand, as the pressure on the bolt head (nut) increases, the inclined check teeth on the front of the gasket are flattened by the nut, and the check teeth are pressed and extended inwards (towards the screw). One of its protrusions slides into the check groove on the screw and locks in place, thus preventing the bolt from loosening in the opposite direction and achieving the effect of preventing loosening and detachment. If it is necessary to loosen the bolt, simply rotate the bolt in the opposite direction with a tool. The reverse torque will overcome the torque of the check teeth, allowing for easy disassembly.

[0011] Compared with existing technologies, this utility model has a simple and novel structure, requires no special installation tools, is easy and quick to operate, has a high vibration resistance in locking effect, and is highly practical. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a bolt structure in this utility model.

[0013] Figure 2 This is a schematic diagram of one structure of the gasket in this utility model.

[0014] Figure 3 yes Figure 2 A schematic diagram of the structure on the back of the A-side gasket.

[0015] Figure 4 yes Figure 2 BB cross-sectional view.

[0016] Figure 5 This is a schematic diagram of another structure of the gasket in this utility model.

[0017] Figure 6 yes Figure 5 A schematic diagram of the structure on the back of the C-direction gasket.

[0018] Figure 7 yes Figure 5 DD sectional view.

[0019] Figure 8This is a schematic diagram of a combination of bolts and washers in this utility model.

[0020] Figure 9 This is a schematic diagram of one usage state of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Fix the substrate.

[0023] 2. Washer, 201. Front side of washer, 202. Back side of washer, 203. Check valve protrusion, 204. Check valve teeth.

[0024] 3 bolts, 301 nuts, 302 screws, 303 check grooves.

[0025] 4. Fixed objects.

[0026] The present invention will now be explained in detail with reference to the accompanying drawings and embodiments. Detailed Implementation

[0027] See Figure 1 , Figure 8 The figure shows the bolt 3 of the mechanical anti-loosening device of this application. The bolt 3 includes a nut 301 and a screw 302. A check groove 303 is provided longitudinally on the screw 302. There is one check groove in one longitudinal row on the screw, two check grooves in two longitudinal rows, etc.

[0028] The structure of gasket 2 in this application is shown in [reference]. Figures 2 to 7 The structural feature of gasket 2 is that it has several one-way toothed check valve protrusions 203 on its back surface 202, and several check valve teeth 204 protruding from the gasket surface at the inner edge of the front surface 201. The check valve teeth 204 are inclined, tilting from bottom to top towards the inner axis. (Here's an explanation: the front and back surfaces of the gasket refer to the side of the gasket that contacts the nut as the front surface and the other side as the back surface; from bottom to top, "up" means closer to the nut, and vice versa.) The structure of the check valve teeth 204 can be arbitrarily designed. For example, Figures 2 to 4 As shown, the check valve tooth 204 can be a conical protrusion, and the conical protrusion of the check valve tooth 204 is inclined inward from bottom to top; for example, Figures 5 to 7 As shown, the check tooth 204 can also be a curved toothed shape. The curved toothed check tooth 204 is also inclined inwards from bottom to top. The check protrusion 203 on the back of the washer 202 has a one-way toothed structure. "One-way" means that the teeth are set on the side opposite to the bolt tightening direction. That is, during use, when the bolt is tightened, the toothed check protrusion 203 on the back of the washer 202 clamps onto the surface of the underlying fixed object in the opposite direction of tightening, preventing the washer from sliding in the opposite direction. See also... Figure 3 , Figure 4 , Figure 6 , Figure 7 As shown, the check valve protrusions 203 are distributed on the back side 202 of the gasket, and the number is arbitrary. In order to achieve a better check valve effect, they can be distributed in a ring on the back side 202 of the gasket as shown in the figure. The shape of the check valve protrusions 203 can be ratchet-shaped.

[0029] The check groove 303 on the screw 302 corresponds to the check tooth 204 on the front side 201 of the gasket. See [reference needed] Figure 8 As shown, during use, when the bolt 3 is tightened, the nut 301 gradually approaches the front side 201 of the washer. As the pressure of the nut 301 increases, the upward-sloping check tooth 204 is flattened by the nut 301. The check tooth 204 is pressed and extends inward (towards the screw 302) until one of its protrusions slides into the check groove 303 on the screw 302 and locks in place, thereby preventing the bolt 3 from loosening in the opposite direction and achieving the effect of preventing loosening and detachment.

[0030] The number of check grooves 303 on the screw 302 and the number of check teeth 204 on the front side 201 of the washer can be set arbitrarily. For example, 2 check grooves 303 correspond to 5 check teeth 204, 5 check grooves 303 correspond to 3 check teeth 204, 5 check grooves 303 correspond to 5 check teeth 204, and so on.

[0031] To achieve a better anti-return effect, the anti-return groove 303 should preferably be set from the beginning of the screw 302 at the root of the nut 301. The length of the anti-return groove 303 on the screw 302 (referring to the longitudinal length on the screw 302) should not be less than the height of the anti-return pressure tooth 204. The length of the anti-return groove 303 can also be the same as the length of the bolt 3, and can be set arbitrarily.

[0032] Briefly describe the usage of this utility model. This utility model is applicable to scenarios where there is no nut for fixing, which mostly involve fixing with blind holes in the substrate. For example... Figure 9 As shown, the fixing object 4 is tapped and fixed on the fixing base 1. As the bolt 3 is tightened, during the tightening process, the anti-return protrusion 203 on the back side 202 of the washer gradually and tightly engages with the fixing object 4, preventing the washer 2 from rotating or sliding in the reverse direction. The pressure of the nut 301 continuously increases, and the inclined anti-return teeth 204 on the front side 201 of the washer are gradually flattened by the nut 301. The anti-return teeth 204 extend inward at an inward angle, and one of their protrusions slides into the anti-return groove 303 on the screw 302 and locks in place (see...). Figure 8 As shown in the diagram, this prevents bolt 3 from loosening in the opposite direction, achieving an anti-loosening and anti-detachment effect. To loosen the bolt, simply rotate it in the opposite direction with a tool; the reverse torque will overcome the anti-reverse clamping torque, allowing for smooth disassembly. This application requires no special tools during operation; any commonly used bolt removal tool will suffice. It is simple, quick, and provides a high vibration-resistant locking effect.

Claims

1. A mechanical anti-loosening device, comprising a bolt (3) and a washer (2), wherein the bolt (3) includes a nut (301) and a threaded rod (302), and the washer (2) includes a washer front (201) and a washer back (202), characterized in that, The back side (202) of the gasket is provided with several unidirectional toothed check protrusions (203), and the inner edge of the front side (201) of the gasket is provided with several check pressure teeth (204) protruding from the gasket surface. The check pressure teeth (204) are inclined from bottom to top towards the inner axis. The screw (302) is provided with a check groove (303), which corresponds to the check pressure teeth (204).

2. A mechanical anti-unscrewing device according to claim 1, characterized in that The check groove (303) is provided at least from the beginning of the screw (302) at the root of the nut (301), and the length of the check groove (303) on the screw (302) is not less than the height of the check pressure tooth (204).

3. A mechanical anti-unscrewing device according to claim 1, characterized in that The anti-return pressure tooth (204) is a conical protrusion that is inclined from bottom to top towards the inner center of the circular axis.

4. A mechanical anti-unscrewing device according to claim 1, characterized in that The anti-return pressure tooth (204) is a curved tooth-shaped piece that is inclined from bottom to top towards the inner axis.

5. A mechanical anti-unscrewing device according to claim 1, characterized in that The plurality of unidirectional toothed check valve protrusions (203) are distributed in a ring on the back side (202) of the gasket.

6. A mechanical anti-loosening device according to claim 1 or 5, characterized in that The anti-return protrusion (203) is unidirectional ratchet-shaped.

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