Wedge-shaped anti-loose gasket

Abstract

The utility model discloses a wedge-shaped anti-loose gasket, which relates to the field of gaskets and comprises a fixing screw and an upper gasket arranged on the outer side of the fixing screw. The lower gasket is mounted at the bottom of the upper gasket; according to the wedge-shaped anti-loose gasket, a screw is fixed through tension between the lower gasket cam and the upper gasket cam instead of friction force, and the cam dip angle of the lower gasket cam and the upper gasket cam is larger than the thread pitch of a screw thread. After fastening, the lower gasket cam and the upper gasket cam change the mode that a traditional gasket mainly achieves looseness prevention through friction force through an embedded structure, the double effects of looseness prevention and tightening are achieved through tension between the two gaskets, and the lower gasket cam and the upper gasket cam can generate a wedge-shaped effect below a thread head or a nut. The clamping force of the connecting piece is still kept under strong vibration, the clamping force is better than that of a fastener which comes from a lock by means of friction force, and the fastening piece can be disassembled only by screwing an upper gasket cam to exceed a lower gasket cam to apply force in a bolt during disassembly.

Description

Technical Field

[0001] The utility model relates to a gasket technology, in particular to a wedge-shaped anti-loosening gasket. Background Art

[0002] The functions of gaskets mainly include the following:

[0003] Filling gaps: When there are unevenness or gaps between two connected parts, shims can fill these gaps to ensure a tight connection.

[0004] Prevent water leakage: Gaskets can form an effective seal at the connection point to prevent liquid or gas leakage and maintain the normal operation of the system.

[0005] Reduce friction: Gaskets can act as a buffer and reduce friction, extending the service life of the equipment.

[0006] Adjust thickness: By selecting spacers of different thicknesses and materials, the gap or pressure between connected parts can be adjusted to achieve precise adjustment.

[0007] In general, gaskets play a very important role in mechanical equipment, pipeline connections, automobile engines and other fields, ensuring the normal operation of the equipment and the stability of the connection.

[0008] A Chinese utility model patent with publication number CN220470457U discloses a gasket, which fixes a bolt through the deformation gap of an extrusion part. The bolt is tightened downward and gradually approaches the extrusion part, driving the extrusion part to deform. The extrusion part deforms toward both sides, which can tighten the bolt and enhance the locking effect. A first top block is provided to cooperate with the locking of the bolt, which can be driven downward to tighten the product surface so that the first top block cooperates with the anti-slip support foot to form a support and enhance the support strength, but it is not convenient for the installation and disassembly of the fixing bolt in a small space.

[0009] A Chinese utility model patent with publication number CN217502248U discloses a split anti-loosening gasket. The split anti-loosening gasket is achieved by arranging a first gasket and a second gasket into two identical halves symmetrical about the axis center. When installing, if many gaskets are placed together, there is no need to distinguish between the first gasket and the second gasket. Two halves of the gaskets can be randomly taken to form a circular gasket body. The installation requires manual alignment of the gaskets. When working in a small space, the construction worker's hands block the gasket installation line of sight, resulting in the gasket end not being aligned before the bolt is tightened, increasing the probability of the bolt loosening.

[0010] When existing gaskets are used, conventional bolt anti-loosening methods generally include adding flat washers, spring washers, double nuts to prevent loosening, and threading steel wires and folding small iron sheets to prevent the fixing bolts from loosening. However, in high-load vibration situations, the anti-loosening performance of flat washers, spring washers, and double nuts is unreliable, and threading steel wires to prevent loosening bolts requires holes to be opened, and folding small iron sheets to prevent loosening is not convenient for disassembly. Traditional bolt anti-loosening gaskets essentially still rely on friction to pre-tighten bolt connections. Utility Model Content

[0011] The utility model aims to provide a wedge-shaped anti-loosening gasket to solve the above-mentioned deficiencies in the prior art.

[0012] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a wedge-shaped anti-loosening gasket includes a fixing screw and also includes:

[0013] Upper gasket, which is installed on the outside of the fixing screw;

[0014] The lower gasket is installed on the bottom of the upper gasket.

[0015] The fixing screw provides a pressing force for the upper gasket and the lower gasket, the upper gasket and the lower gasket are clamped with each other, and the inclination angle of the connection between the upper gasket and the lower gasket is greater than the thread pitch of the fixing screw.

[0016] Furthermore, the fixing screw comprises:

[0017] The screw head, which is mounted on top of the set screw;

[0018] The screw rod is fixedly installed at the middle part of the bottom of the screw head.

[0019] The screw head has a uniform external geometric shape, which is convenient for disassembly using tools. A thread is provided at the bottom of the screw rod, and the thread extends from the bottom of the screw rod to the top of the screw rod. The screw head and the screw rod are both made of metal materials that are not easily deformed.

[0020] Furthermore, the upper gasket includes:

[0021] An upper washer, which is sleeved on the outer side of the screw;

[0022] Upper radial serrations, which are fixedly mounted on the top of the upper washer;

[0023] The upper washer cam is fixedly mounted on the bottom of the upper washer.

[0024] The upper washer is made of a wear-resistant and high-toughness metal material. The material of the upper washer is uniform. A through hole is opened in the middle of the upper washer. The side wall of the through hole opened in the middle of the upper washer is smooth. The teeth of the upper radial serrations are oriented in the tightening direction of the bolt. When the fixing screws are tightened, the teeth of the upper radial serrations will not hinder the tightening of the screw head, reducing the friction between the bottom of the screw head and the upper radial serrations, and can apply greater fixing force when the fixing screws are tightened. The serrations of the upper washer cam are oriented in the tightening direction of the bolt, and the wheel pitch of the upper washer cam is much larger than the tooth pitch of the serrations.

[0025] Furthermore, the lower gasket comprises:

[0026] A lower washer is sleeved on the outside of the screw and is located at the bottom of the upper washer;

[0027] A lower washer cam, which is fixedly mounted on the top of the lower washer;

[0028] The lower radial serrations are fixedly mounted on the bottom of the lower gasket.

[0029] Furthermore, the bottom of the upper washer cam is clamped with the top of the lower washer cam.

[0030] Furthermore, the inclination angle of the lower washer cam is greater than the thread pitch of the bolt.

[0031] The lower washer is made of a wear-resistant and high-toughness metal material. The material of the lower washer is uniform. A through hole is opened in the middle of the lower washer. The side wall of the through hole opened in the middle of the lower washer is smooth. The bottom of the lower radial serration is connected to the top of the fixed object. The direction of the sawtooth of the lower radial serration is opposite to the tightening direction of the bolt. When the fixing screw is tightened, the sawtooth of the lower radial serration will not hinder the rotation direction of the screw head, and the friction between the lower radial serration and the lower fixed object is reduced when the screw head is tightened. When the fixing screw is tightened, the adhesion between the upper gasket and the lower gasket is increased, and the adhesion between the lower radial serration and the surface of the fixed object is increased. The sawtooth direction of the cam of the lower washer is opposite to the tightening direction of the bolt. The wheel pitch of the cam of the lower washer is much larger than the tooth pitch of the lower radial serration. The sawtooth density and the sawtooth size of the lower radial serration can be selected according to the smoothness of the surface of the fixed object. The wheel pitch of the cam of the lower washer is the same as the wheel pitch of the cam of the upper washer. The direction of the cam of the lower washer and the cam of the upper washer are opposite. The cam of the lower washer and the cam of the upper washer can fit tightly under the pressure of the fixing screw.

[0032] Compared with the prior art, the wedge-shaped anti-loosening gasket provided by the utility model has the following advantages:

[0033] 1. The screws are fixed by the tension between the lower washer cam and the upper washer cam instead of friction. The cam inclination angle of the lower washer cam and the upper washer cam is greater than the pitch of the screw thread. After tightening, the lower washer cam and the upper washer cam change the traditional washers' anti-loosening method mainly through friction through the embedded structure, and use the tension between the two washers to achieve the dual effects of anti-loosening and tightening. The lower washer cam and the upper washer cam will produce a wedge effect under the thread head or nut, and still maintain the clamping force of the connector under strong vibration, which is better than fasteners that rely on friction to lock. When disassembling, just twist the upper washer cam to exceed the force applied to the bolt by the lower washer cam to disassemble.

[0034] Second, just place the inner beveled surfaces of the two washers opposite to each other and place them between the nut and the connecting material. After the nut is tightened, the radial convex surface on the outer side of the anti-loosening washer is in a bite state with the contact surfaces at both ends. The slope angle of the inner beveled surface of the washer is greater than the thread angle of the bolt. When the bolt is stretched due to mechanical vibration, the nut will rotate and loosen. Since the friction force of the outer radial convex surface of the anti-loosening washer is greater than the friction force between the inner beveled surfaces, in this state, only the inner beveled surfaces are allowed to move relative to each other, which will then generate a certain lifting tension.

[0035] 3. When the bolt shrinks, the beveled tooth surface of the washer will cause the nut to return to its original position, thereby achieving the effect of preventing loosening and tightening. When the connecting material is non-metallic material, a metal plate can be fixed on the connecting material and the anti-loosening washer can be used. There is no need to use a torque wrench when installing the anti-loosening washer. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0037] Figure 1 The overall structural diagram provided for the embodiment of the utility model;

[0038] Figure 2 A first schematic diagram of an upper gasket and a lower gasket provided in an embodiment of the utility model;

[0039] Figure 3 A cross-sectional view of an upper gasket and a lower gasket provided in an embodiment of the utility model;

[0040] Figure 4 A second schematic diagram of the upper gasket and the lower gasket provided in an embodiment of the utility model.

[0041] Description of reference numerals:

[0042] 1. Fixing screw; 2. Upper gasket; 3. Lower gasket; 11. Screw head; 12. Screw rod; 21. Upper washer; 22. Upper radial serrations; 23. Upper washer cam; 31. Lower washer; 32. Lower radial serrations; 33. Lower washer cam. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0044] Embodiment 1:

[0045] See also Figure 1-Figure 4 , a wedge-shaped locking gasket, including a fixing screw 1, and also including:

[0046] An upper gasket 2, which is installed on the outside of the fixing screw 1;

[0047] The lower gasket 3 is installed on the bottom of the upper gasket 2.

[0048] The specific implementation is as follows: the fixing screw 1 provides a pressing force for the upper gasket 2 and the lower gasket 3 , the upper gasket 2 and the lower gasket 3 are clamped together, and the inclination angle at the connection between the upper gasket 2 and the lower gasket 3 is greater than the thread pitch of the fixing screw 1 .

[0049] The fixing screw 1 includes:

[0050] A screw head 11, which is mounted on the top of the fixing screw 1;

[0051] The screw rod 12 is fixedly mounted at the middle of the bottom of the screw head 11 .

[0052] The specific implementation is as follows: the screw head 11 is an externally uniform geometric shape, which is convenient for disassembly using tools. A thread is provided at the bottom of the screw rod 12, and the thread extends from the bottom of the screw rod 12 to the top of the screw rod 12. The screw head 11 and the screw rod 12 are both made of metal materials that are not easily deformed.

[0053] The upper gasket 2 comprises:

[0054] An upper washer 21, which is sleeved on the outer side of the screw rod 12;

[0055] Upper radial serrations 22, which are fixedly mounted on the top of the upper washer 21;

[0056] The upper washer cam 23 is fixedly mounted on the bottom of the upper washer 21 .

[0057] The specific implementation is as follows: the top of the upper washer 21 has a radial convex surface, the upper washer 21 is made of a wear-resistant and tough metal material, the upper washer 21 has a uniform material, a through hole is provided in the middle of the upper washer 21, the side wall of the through hole provided in the middle of the upper washer 21 is smooth, the sawtooth direction of the upper radial serrations 22 is in the bolt tightening direction, when the fixing screw 1 is tightened, the sawtooth of the upper radial serrations 22 will not hinder the tightening of the screw head 11, and the friction between the bottom of the screw head 11 and the upper radial serrations 22 is reduced, so that a greater fixing force can be applied when the fixing screw 1 is tightened, the bottom of the upper washer cam 23 is a bevel tooth surface, the sawtooth direction of the bottom of the upper washer cam 23 is in the bolt tightening direction, and the wheelbase of the upper washer cam 23 is much larger than the sawtooth pitch of the upper radial serrations 22.

[0058] The lower gasket 3 comprises:

[0059] A lower washer 31 is sleeved on the outside of the screw rod 12 and is located at the bottom of the upper washer 2;

[0060] A lower washer cam 33, which is fixedly mounted on the top of the lower washer 31;

[0061] The lower radial serrations 32 are fixedly mounted on the bottom of the lower gasket 31 .

[0062] The bottom of the upper washer cam 23 is engaged with the top of the lower washer cam 33 .

[0063] The inclination angle of the lower washer cam 33 is greater than the pitch of the bolt thread.

[0064] The specific implementation is as follows: the top of the lower washer 31 has a radial convex surface, which is made of a wear-resistant and tough metal material. The material of the lower washer 31 is uniform, and a through hole is opened in the middle of the lower washer 31. The side wall of the through hole opened in the middle of the lower washer 31 is smooth, and the bottom of the lower radial serrations 32 is a bevel tooth surface. The bottom of the lower radial serrations 32 is connected to the top of the fixed object, and the serrations of the lower radial serrations 32 are in the opposite direction of the bolt tightening direction. When the fixing screw 1 is tightened, the serrations of the lower radial serrations 32 will not hinder the rotation direction of the screw head 11, reducing the friction between the lower radial serrations 32 and the lower fixed object when the screw head 11 is tightened. When the set screw 1 is tightened, the adhesion force between the upper gasket 2 and the lower gasket 3 increases, and at the same time, the adhesion force between the lower radial serrations 32 and the surface of the fixed object is increased. The sawtooth direction of the lower washer cam 33 is opposite to the tightening direction of the bolt. The wheel spacing of the lower washer cam 33 is much larger than the sawtooth pitch of the lower radial serrations 32. The sawtooth density and sawtooth size of the lower radial serrations 32 can be selected according to the smoothness of the surface of the fixed object. The wheel spacing of the lower washer cam 33 is the same as the wheel spacing of the upper washer cam 23. The lower washer cam 33 and the upper washer cam 23 are in opposite directions. The lower washer cam 33 and the upper washer cam 23 can fit tightly under the pressure of the fixing screw 1.

[0065] Working principle: When in use, the fixing screw 1 is fixed by relying on the tension of the lower washer cam 33 and the upper washer cam 23. The cam inclination angle of the lower washer cam 33 and the upper washer cam 23 is greater than the pitch of the thread of the screw 12. After tightening, the lower washer cam 33 and the upper washer cam 23 will produce a wedge effect under the screw head 11 or the nut. In high-load vibration situations, the fixing screw 1 can be lowered and still remain tightened. When disassembling, just turn the fixing screw 1 until the upper washer cam 23 exceeds the lower washer cam 33 to apply the force in the fixing screw 1, and then it can be disassembled.

[0066] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A wedge-shaped locking gasket, comprising a fixing screw (1), characterized in that: Also includes: An upper gasket (2) mounted on the outside of the fixing screw (1); A lower gasket (3) mounted on the bottom of the upper gasket (2); The fixing screw (1) comprises: A screw head (11) mounted on the top of the fixing screw (1); A screw rod (12) fixedly mounted at the middle of the bottom of the screw head (11); The upper gasket (2) comprises: An upper washer (21) sleeved on the outside of the screw rod (12); An upper radial serration (22) fixedly mounted on the top of the upper washer (21); An upper washer cam (23) fixedly mounted on the bottom of the upper washer (21); The lower gasket (3) comprises: A lower washer (31) is sleeved on the outside of the screw rod (12), and the lower washer (31) is located at the bottom of the upper gasket (2); a lower washer cam (33) is fixedly installed on the top of the lower washer (31); A lower radial sawtooth (32) fixedly mounted on the bottom of the lower gasket (31); The bottom of the upper washer cam (23) is clamped with the top of the lower washer cam (33); The inclination angle of the lower washer cam (33) is greater than the thread pitch of the bolt.

Images