Flat washer with good anti-loosening effect

Abstract

The utility model discloses a flat washer with a good anti-loosening effect, belongs to the technical field of anti-loosening flat washers, solves the problem that the nut fastening process is strenuous due to the fact that strip-shaped lines of an existing device always hinder the nut fastening process, and comprises a flat washer body. Rectangular grooves are symmetrically formed in the top face and the bottom face of the flat washer body, an upper non-slip mat is fixedly installed on the bottom face of the rectangular groove located in the top face of the flat washer body, the thickness of the upper non-slip mat is gradually increased from one side to the other side, and an arc-shaped groove is formed in the thick side wall of the upper non-slip mat. The lower non-slip mat which is the same as the upper non-slip mat in structure and opposite to the upper non-slip mat in installation direction is fixedly installed on the top face of the rectangular groove located in the bottom face of the flat washer body, the top face of the upper non-slip mat is extruded through the nut, then the arc-shaped groove can sink downwards, and then the contact area and friction force between the nut and the top face of the upper non-slip mat are slowly increased. And the situation that the nut fastening process is labor-consuming all the time is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-loosening flat washers, in particular to a flat washer with good anti-loosening effect. Background Art

[0002] Flat washers are a type of fasteners in the shape of a flat ring. Flat washers are mainly used to pad between nuts and bolts. They can increase the contact area of ​​the bolt and nut connection and prevent scratches on the workpiece when the bolt and nut are tightened.

[0003] After searching, the application with patent number CN202020023643.9 discloses a friction type anti-loosening flat washer, including a flat washer body, an upper stripe pattern, a lower stripe pattern and a central circular through hole, wherein the upper part of the flat washer body is provided with an upper stripe pattern, the lower part of the flat washer body is provided with a lower stripe pattern, and the middle part of the flat washer body is provided with a central circular through hole;

[0004] Although the friction type anti-loosening flat washer increases the friction by adding stripes of a certain depth on the upper and lower surfaces of the flat washer, so that the flat washer also has an anti-loosening function, the stripes of the friction type anti-loosening flat washer will always hinder the process of tightening the nut, making the process of tightening the nut more laborious.

[0005] Therefore, we propose a flat washer with good anti-loosening effect. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a flat washer with good anti-loosening effect, which solves the problem that the stripe pattern of the prior device always hinders the process of tightening the nut, making the process of tightening the nut more laborious.

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a flat washer with good anti-loosening effect, comprising a flat washer body, the top and bottom surfaces of the flat washer body are symmetrically provided with rectangular grooves, an upper anti-slip pad is fixedly installed on the bottom surface of the rectangular groove on the top surface, the thickness of the upper anti-slip pad gradually becomes thicker from one side to the other side, an arc-shaped groove is provided on the thicker side wall of the upper anti-slip pad, and a lower anti-slip pad with the same structure as the upper anti-slip pad and installed in the opposite direction is fixedly installed on the top surface of the rectangular groove on the bottom surface of the flat washer body.

[0008] Preferably, there are 8 rectangular grooves in total and they are symmetrically distributed on the top and bottom surfaces of the flat washer body. The upper anti-slip pad and the lower anti-slip pad are both made of soft rubber. The process of rotating the nut in the direction in which the anti-slip pad becomes thicker is the tightening process. When tightening the nut, the upper anti-slip pad made of soft rubber will be squeezed by the nut, and then deformed and filled in the gap between the nut and the flat washer body, so as to increase the friction between the contact surface of the flat washer body and the nut.

[0009] Preferably, five upper anti-skid pads distributed in an array and connected end to end are fixedly installed on the bottom surface of the rectangular groove located on the top surface of the flat washer body, and five lower anti-skid pads distributed in an array and connected end to end are fixedly installed on the top surface of the rectangular groove located on the bottom surface of the flat washer body, wherein the upper anti-skid pads can increase the friction between the flat washer body and the nut, and the lower anti-skid pads can increase the friction between the nut and the connected parts.

[0010] Preferably, a circular through hole is penetrated through the top surface of the flat washer body, and rubber rings made of soft rubber material are fixedly installed at both ends of the circular through hole, wherein the flat washer body is conveniently sleeved on the outside of the bolt through the circular through hole, and when the nut squeezes the rubber ring, the rubber ring will deform toward the inside of the circular through hole, so that the rubber ring can fill the gap between the circular through hole and the bolt, thereby increasing the friction between the circular through hole and the bolt, and avoiding relative movement between the flat washer body and the bolt.

[0011] Preferably, half of the rubber ring is located inside the circular through hole, and the other side of the rubber ring is located outside the circular through hole, wherein the rubber ring is convenient for contacting with the nut.

[0012] Preferably, the side wall of the flat washer body is provided with four exhaust holes distributed in an array and connected to the circular through hole, wherein when the rubber ring is filled in the gap between the circular through hole and the bolt, the air inside the circular through hole is easily discharged through the exhaust holes, making it easier for the rubber ring to fill the gap between the circular through hole and the bolt, so as to reduce the resistance when tightening the nut.

[0013] The utility model provides a flat washer with good anti-loosening effect. It has the following beneficial effects:

[0014] 1. The flat washer with good anti-loosening effect squeezes the top surface of the upper anti-skid pad through the nut, and then the arc-shaped groove will be concave downward, and the side wall of the arc-shaped groove will contact the top surface of the upper anti-skid pad in front of it, and then slowly increase the contact area between the nut and the top surface of the upper anti-skid pad, so that the friction force on the nut during the tightening process is gradually increased, avoiding the situation that the process of tightening the nut is always laborious. At the same time, the lower anti-skid pad will also fill between the flat washer body and the connected parts. When the nut is vibrated, the contact area between the upper anti-skid pad and the nut is increased, so that the nut is difficult to rotate. Similarly, the flat washer body is also difficult to rotate under the action of the friction between the lower anti-skid pad and the connected parts, thereby achieving the purpose of preventing the nut from loosening, and solving the problem that the stripe pattern of the existing device always hinders the process of tightening the nut, resulting in a relatively laborious process of tightening the nut;

[0015] 2. The flat washer with good anti-loosening effect can squeeze the rubber ring downward during the tightening process of the nut. The rubber ring will fill the gap between the circular through hole and the bolt, which can further increase the friction between the circular through hole and the bolt, and can avoid relative rotation between the flat washer body and the bolt, which is beneficial to increase the stability of the flat washer body and can avoid the loosening of the nut due to relative rotation between the flat washer body and the bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a side view structural schematic diagram of the utility model;

[0018] Figure 3 This is a schematic diagram of the split structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the upper anti-slip pad of the utility model.

[0020] In the figure: 1, flat washer body; 11, circular through hole; 12, exhaust hole; 13, rectangular groove; 2, upper anti-skid pad; 21, arc groove; 3, rubber ring; 4, lower anti-skid pad. DETAILED DESCRIPTION

[0021] 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.

[0022] Example 1: Figure 1-4As shown: it includes a flat washer body 1, and rectangular grooves 13 are symmetrically opened on the top and bottom surfaces of the flat washer body 1. An upper anti-skid pad 2 is fixedly installed on the bottom surface of the rectangular groove 13 located on the top surface. The thickness of the upper anti-skid pad 2 gradually becomes thicker from one side to the other side. The thicker side wall of the upper anti-skid pad 2 is opened with an arc groove 21. A lower anti-skid pad 4 with the same structure as the upper anti-skid pad 2 and the opposite installation direction is fixedly installed on the top surface of the rectangular groove 13 located on the bottom surface of the flat washer body 1. There are 8 rectangular grooves 13 in total and they are symmetrically distributed on the top and bottom surfaces of the flat washer body 1. The materials of the upper anti-skid pad 2 and the lower anti-skid pad 4 are both soft rubber. Five upper anti-skid pads 2 distributed in an array and connected end to end are fixedly installed on the bottom surface of the rectangular groove 13 located on the top surface of the flat washer body 1. The rectangular groove 1 The top surface of the flat washer 3 is fixedly installed with 5 lower anti-skid pads 4 distributed in an array and connected end to end. The top surface of the upper anti-skid pad 2 is squeezed by the nut, and then the arc groove 21 will be concave downward, and the side wall of the arc groove 21 will contact the top surface of the upper anti-skid pad 2 in front of it, and then slowly increase the contact area between the nut and the top surface of the upper anti-skid pad 2, so that the friction force received by the nut during the tightening process can be gradually increased, avoiding the situation that the process of tightening the nut is always laborious. At the same time, the lower anti-skid pad 4 will also fill between the flat washer body 1 and the connected parts. When the nut is vibrated, the contact area between the upper anti-skid pad 2 and the nut is increased, so the nut is difficult to rotate. Similarly, the flat washer body 1 is also difficult to rotate under the action of the friction between the lower anti-skid pad 4 and the connected parts, thereby achieving the purpose of preventing the nut from loosening;

[0023] Example 2: Figure 1-3 As shown: a circular through hole 11 is formed through the top surface of the flat washer body 1, and rubber rings 3 made of soft rubber are fixedly installed at both ends of the circular through hole 11, half of the rubber ring 3 is located inside the circular through hole 11, and the other side of the rubber ring 3 is located outside the circular through hole 11, and the side wall of the flat washer body 1 is provided with four exhaust holes 12 distributed in an array and connected to the circular through hole 11. By squeezing the rubber ring 3 downward during the tightening of the nut, the rubber ring 3 will fill the gap between the circular through hole 11 and the bolt, and the air inside the circular through hole 11 can be discharged through the exhaust hole 12, so that the rubber ring 3 can fill the gap between the circular through hole 11 and the bolt, so as to reduce the resistance when tightening the nut, further increase the friction between the circular through hole 11 and the bolt, avoid relative rotation between the flat washer body 1 and the bolt, and help increase the stability of the flat washer body 1, and avoid the loosening of the nut due to relative rotation between the flat washer body 1 and the bolt.

[0024] The working principle and use process of the utility model are as follows: when using the flat washer with good anti-loosening effect, the flat washer body 1 is sleeved on the outside of the bolt, while keeping the upper anti-skid pad 2 in contact with the nut, and then the nut is tightened in the direction in which the upper anti-skid pad 2 becomes thicker. During the tightening process of the nut, the upper anti-skid pad 2 will be squeezed and deformed by the nut, and then the arc-shaped groove 21 will be concave downward, and the side wall of the arc-shaped groove 21 will contact the top surface of the upper anti-skid pad 2 in front of it, thereby increasing the contact area between the nut and the top surface of the upper anti-skid pad 2, and at the same time, the lower The anti-skid pad 4 will also be filled between the flat washer body 1 and the connected parts. When the nut is vibrated, the contact area between the upper anti-skid pad 2 and the nut increases, so the nut is difficult to rotate. Similarly, the flat washer body 1 is also difficult to rotate due to the friction between the lower anti-skid pad 4 and the connected parts. The rubber ring 3 will be filled in the gap between the circular through hole 11 and the bolt, which can increase the friction between the circular through hole 11 and the bolt, avoid relative movement between the flat washer body 1 and the bolt, and achieve the purpose of preventing the nut from loosening.

[0025] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0026] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A flat washer with good anti-loosening effect, characterized in that: The flat washer body (1) comprises a flat washer body (1), wherein the top and bottom surfaces of the flat washer body (1) are symmetrically provided with rectangular grooves (13), an upper anti-skid pad (2) is fixedly mounted on the bottom surface of the rectangular groove (13) on the top surface, the thickness of the upper anti-skid pad (2) gradually increases from one side to the other side, an arc-shaped groove (21) is provided on the thicker side wall of the upper anti-skid pad (2), and a lower anti-skid pad (4) having the same structure as the upper anti-skid pad (2) and installed in the opposite direction is fixedly mounted on the top surface of the rectangular groove (13) on the bottom surface of the flat washer body (1).

2. A flat washer with good anti-loosening effect according to claim 1, characterized in that: A total of eight rectangular grooves (13) are provided and are symmetrically distributed on the top surface and the bottom surface of the flat washer body (1); the upper anti-slip pad (2) and the lower anti-slip pad (4) are both made of soft rubber.

3. A flat washer with good anti-loosening effect according to claim 1, characterized in that: Five upper anti-skid pads (2) distributed in an array and connected end to end are fixedly installed on the bottom surface of the rectangular groove (13) located on the top surface of the flat washer body (1), and five lower anti-skid pads (4) distributed in an array and connected end to end are fixedly installed on the top surface of the rectangular groove (13) located on the bottom surface of the flat washer body (1).

4. A flat washer with good anti-loosening effect according to claim 1, characterized in that: A circular through hole (11) is formed through the top surface of the flat washer body (1), and rubber rings (3) made of soft rubber are fixedly mounted at both ends of the circular through hole (11).

5. A flat washer with good anti-loosening effect according to claim 4, characterized in that: One half of the rubber ring (3) is located inside the circular through hole (11), and the other side of the rubber ring (3) is located outside the circular through hole (11).

6. A flat washer with good anti-loosening effect according to claim 1, characterized in that: The side wall of the flat gasket body (1) is provided with four exhaust holes (12) distributed in an array and connected to the circular through hole (11).

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