Three-stage rebuilt valve system of shock absorber

Abstract

The utility model discloses a three-stage rebuilt valve system of a shock absorber. The three-stage rebuilt valve system of the shock absorber comprises a three-stage rebuilt valve system body, a lower screw rod is fixedly connected to the bottom end of the three-stage rebuilt valve system body, a sleeve is fixedly connected to the top end of the three-stage rebuilt valve system body, a gasket is arranged above the sleeve, an upper screw rod is welded to the top end of the gasket, and a piston rod is welded to the middle of the bottom end of the gasket. The piston rod extends into the sleeve. Through the arrangement of the sealing ring, when the piston rod does piston motion in the sleeve, the sealing ring can be tightly attached to the outer side of the piston rod outwards all the time through the elastic force of the third spring, so that a gap is not prone to being formed between the piston rod and the sealing ring when the piston rod does piston motion up and down; meanwhile, the groove in the side, close to the piston rod, of the sealing ring can store lubricating oil or grease, friction force between the piston rod and the sealing ring is greatly reduced, and the sealing ring is not prone to being abraded or damaged to cause leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, in particular to a three-level recovery valve system of a shock absorber. Background Art

[0002] The term "shock absorber" is a common term in the automobile chassis industry. A car shock absorber is actually a vibration damper. Shock absorbers are not only used in suspension in cars, but also in other places. For example, they are used in the cab, seats, steering wheels, etc. They can also be used as buffers on vehicle bumpers. The piston in the shock absorber moves up and down, and the oil in the shock absorber cavity repeatedly flows from one cavity to another through different pores. At this time, the friction between the pore wall and the oil and the internal friction between the oil molecules form a damping force on the vibration, so that the vibration energy of the car is converted into oil heat energy, which is then absorbed by the shock absorber and dissipated into the atmosphere;

[0003] The existing application number is CN202123290924.4, which is a novel restoring valve structure shock absorber, wherein the diameter of the restoring valve plate distributed in a stepped manner gradually decreases from top to bottom, and the additional restoring valve plate has a wider adjustable range and a more stable force value than the existing valve system;

[0004] During the use of the three-stage restoring valve system of the shock absorber, the frequent piston movement of the piston rod can easily cause the sealing ring between the piston rod and the piston sleeve to wear and create a gap, which can easily lead to the entry of foreign dust and impurities into the piston sleeve or the leakage of lubricating oil in the piston sleeve. Once the piston rod is impacted with a strong force, it can easily cause an impact force between the bottom of the piston rod and the piston sleeve, causing damage to the piston sleeve and wear and tear of the bottom of the piston rod. Utility Model Content

[0005] The main purpose of the utility model is to provide a three-stage restoring valve system for a shock absorber, which can effectively solve the problems of easy wear of the sealing ring and the impact force between the bottom of the piston rod and the piston sleeve in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The three-stage restoring valve system of the shock absorber includes a three-stage restoring valve system body, the bottom end of which is fixedly connected to a lower screw, the top end of which is fixedly connected to a sleeve, a gasket is arranged above the sleeve, an upper screw is welded to the top end of the gasket, a piston rod is welded to the middle part of the bottom end of the gasket, the piston rod extends into the sleeve, and a first spring is wound around the outside of the piston rod and the sleeve.

[0008] Preferably, a sealing ring is embedded above the inner wall of the sleeve, and third springs arranged in an annular shape and at equal distances are fixedly connected between the sealing ring and the inner wall of the sleeve.

[0009] Preferably, the cross section of the sealing ring is shaped like an inverted frustum at a side away from the inner wall of the sleeve.

[0010] Preferably, a groove is provided in the middle of the sealing ring away from the inner wall of the sleeve.

[0011] Preferably, a shock-absorbing plate is embedded in the inner bottom end of the sleeve, and a shock-absorbing bent plate is fixedly connected between the bottom end of the shock-absorbing plate and the bottom end of the inner wall of the sleeve.

[0012] Preferably, a second spring is fixedly connected to the gap between the shock-absorbing bent plate and the bottom surface of the inner wall of the sleeve, and a plurality of rubber columns are fixedly connected to the top end of the shock-absorbing plate.

[0013] Preferably, a ventilation hole is provided at the top of the three-stage recovery valve system body on the outer side of the sleeve, a storage groove is provided inside the three-stage recovery valve system body, and sound-absorbing cotton is embedded inside the storage groove, and the cross-section of the sound-absorbing cotton is wavy.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The utility model is provided with a sealing ring. When the piston rod moves in the sleeve, the sealing ring will always closely fit the outer side of the piston rod through the elastic force of the third spring, so that it is not easy to have a gap between the piston rod and the sealing ring when the piston rod moves up and down. At the same time, the groove of the sealing ring close to the side of the piston rod can store lubricating oil or butter, thereby greatly reducing the friction between the piston rod and the sealing ring, making it difficult for the sealing ring to be worn and damaged to cause leakage.

[0016] 2. The utility model is provided with a shock-absorbing plate. When the shock-absorbing force of the piston rod through the first spring and the sleeve exceeds the bearing force of the first spring, the bottom of the piston rod will contact the shock-absorbing plate, and the shock-absorbing plate can buffer the impact force of the piston rod on the lower part of the sleeve by squeezing the shock-absorbing bent plate between the piston rod and the sleeve. At the same time, the shock-absorbing bent plate will squeeze the second spring during the deformation process, and the elastic force of the second spring can play a rebound effect on the deformed shock-absorbing bent plate, so that the shock-absorbing bent plate in conjunction with the second spring can greatly reduce the impact force of the piston rod on the inside of the sleeve, thereby improving the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A diagram of a three-stage restoring valve system of a shock absorber of the utility model;

[0018] Figure 2 It is a schematic diagram of the partial structure of the gasket of the three-stage restoring valve system of the shock absorber of the utility model;

[0019] Figure 3It is a schematic diagram of the sleeve structure of the three-stage restoring valve system of the shock absorber of the utility model;

[0020] Figure 4 It is a schematic cross-sectional structure diagram of the main body of the three-stage restoring valve system of the three-stage restoring valve system of the shock absorber of the utility model;

[0021] Figure 5 The utility model is a schematic diagram of the sleeve cross-sectional structure of the three-stage restoring valve system of the shock absorber.

[0022] In the figure: 1. three-stage recovery valve system body; 101. lower screw; 102. air vent; 103. first spring; 2. gasket; 201. piston rod; 202. upper screw; 3. sleeve; 301. sealing ring; 302. third spring; 303. groove; 304. shock-absorbing plate; 305. rubber column; 306. shock-absorbing bent plate; 307. second spring; 4. storage slot; 401. sound-absorbing cotton. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] like Figure 1-5 As shown, the three-stage restoring valve system of the shock absorber includes a three-stage restoring valve system body 1, the bottom end of the three-stage restoring valve system body 1 is fixedly connected with a lower screw 101, the top end of the three-stage restoring valve system body 1 is fixedly connected with a sleeve 3, a gasket 2 is arranged above the sleeve 3, an upper screw 202 is welded to the top end of the gasket 2, a piston rod 201 is welded to the middle part of the bottom end of the gasket 2, the piston rod 201 extends into the sleeve 3, and a first spring 103 is wound around the outside of the piston rod 201 and the sleeve 3.

[0025] Specifically, when the sleeve 3 and the piston rod 201 are buffered and shock-absorbed by the first spring 103, the diameter of the gasket 2 is longer than the diameter of the first spring 103, so that the top of the first spring 103 can be evenly contacted and supported by the gasket 2, thereby increasing the shock-absorbing property of the first spring 103 between the piston rod 201 and the sleeve 3.

[0026] In this embodiment, a sealing ring 301 is embedded above the inner wall of the sleeve 3, and a third spring 302 arranged in an annular shape and at equal distances is fixedly connected between the sealing ring 301 and the inner wall of the sleeve 3. The cross section of the sealing ring 301 on the side away from the inner wall of the sleeve 3 is in the shape of a truncated cone that is tilted away from the inner wall of the sleeve 3, and a groove 303 is provided in the middle of the side of the sealing ring 301 away from the inner wall of the sleeve 3;

[0027] Specifically, when the piston rod 201 performs piston movement inside the sleeve 3, the sealing ring 301 arranged on the inner wall of the sleeve 3 will always fit tightly to the outer side of the piston rod 201 outwardly through the elastic force of the third spring 302, so that it is not easy to have a gap between the piston rod 201 and the sealing ring 301, thereby reducing the entry of dust and impurities into the sleeve 3 and reducing the leakage of shock absorber oil in the sleeve 3. In addition, the frustum of one side of the sealing ring 301 allows the piston rod 201 to become tighter during the contact process with the sealing ring 301 when the piston rod 201 is inserted into the sleeve 3, so that the sealing ring 301 is not easily damaged at the bottom of the piston rod 201. The groove 303 opened on the sealing ring 301 can store lubricating oil or butter, thereby greatly reducing the friction between the sealing ring 301 and the piston rod 201, making the sealing ring 301 not easy to be damaged, thereby increasing the service life.

[0028] In this embodiment, a shock-absorbing plate 304 is embedded in the inner bottom end of the sleeve 3, a shock-absorbing bent plate 306 is fixedly connected between the bottom end of the shock-absorbing plate 304 and the bottom end of the inner wall of the sleeve 3, a second spring 307 is fixedly connected to the gap between the shock-absorbing bent plate 306 and the bottom surface of the inner wall of the sleeve 3, and a plurality of rubber columns 305 are fixedly connected to the top of the shock-absorbing plate 304.

[0029] Specifically, when the piston rod 201 strikes downwardly against the inside of the sleeve 3 during the shock absorption process, the bottom of the piston rod 201 can contact the shock absorption plate 304 in the sleeve 3, and the shock absorption plate 304 can squeeze the shock absorption bent plate 306 to deform and buffer the impact force on the piston rod 201, so that the piston rod 201 is not easy to cause damage to the sleeve 3 when performing piston movement. At the same time, the shock absorption bent plate 306 can squeeze the second spring 307 during the deformation process, and the elastic force of the second spring 307 can further buffer the impact force between the shock absorption plate 304 and the piston rod 201, thereby further increasing the shock resistance of the piston rod 201. At the same time, the rubber column 305 above the shock absorption plate 304 can increase the shock absorption of the piston rod 201 on the shock absorption plate 304.

[0030] In this embodiment, a vent hole 102 is provided at the top of the three-stage recovery valve system body 1 on the outer side of the sleeve 3, and a storage groove 4 is provided inside the three-stage recovery valve system body 1. Sound-absorbing cotton 401 is embedded inside the storage groove 4, and the cross-section of the sound-absorbing cotton 401 is wavy.

[0031] Specifically, due to the piston movement of the piston rod 201 in the sleeve 3 and the squeezing of the first spring 103, a certain amount of noise will be generated, and the noise can enter the storage tank 4 through the air hole 102 and be absorbed by the sound-absorbing cotton 401, making it difficult to generate noise during use. At the same time, the wavy shape of the sound-absorbing cotton 401 can increase the contact surface with the noise, thereby increasing the adsorption of noise.

[0032] Working principle:

[0033] First, when the piston rod 201 performs piston movement inside the sleeve 3, the sealing ring 301 arranged on the inner wall of the sleeve 3 will always be tightly fitted to the outer side of the piston rod 201 outwards through the elastic force of the third spring 302, so that there is no gap between the piston rod 201 and the sealing ring 301. Then, the truncated cone shape on one side of the sealing ring 301 allows the piston rod 201 to change from wide to tight during the contact process with the sealing ring 301 when it is inserted into the sleeve 3, so that the sealing ring 301 is not easily damaged at the bottom of the piston rod 201. The groove 303 opened on the sealing ring 301 can store lubricating oil or butter, thereby greatly reducing the friction between the sealing ring 301 and the piston rod 201. Then, when the piston rod 201 hits downward into the inside of the sleeve 3 during the shock absorption process, The bottom of the piston rod 201 can contact the shock-absorbing plate 304 in the sleeve 3, and the shock-absorbing plate 304 can squeeze the shock-absorbing bent plate 306 to deform and buffer the impact force on the piston rod 201, so that the piston rod 201 is not easy to cause damage to the sleeve 3 when the piston rod 201 moves as a piston. At the same time, the shock-absorbing bent plate 306 can squeeze the second spring 307 during the deformation process, and the elastic force of the second spring 307 can further buffer the impact force between the shock-absorbing plate 304 and the piston rod 201. Finally, the piston rod 201 will generate certain noise when the piston moves in the sleeve 3 and squeezes the first spring 103, and the noise can enter the storage tank 4 through the air vent 102 and be absorbed by the sound-absorbing cotton 401, so that it is not easy to generate noise during use.

[0034] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A three-stage restoring valve system for a shock absorber, comprising a three-stage restoring valve system body (1), characterized in that: The bottom end of the three-stage reset valve system body (1) is fixedly connected to a lower screw rod (101), the top end of the three-stage reset valve system body (1) is fixedly connected to a sleeve (3), a gasket (2) is arranged above the sleeve (3), an upper screw rod (202) is welded to the top end of the gasket (2), a piston rod (201) is welded to the middle part of the bottom end of the gasket (2), the piston rod (201) extends into the sleeve (3), and a first spring (103) is wound around the outside of the piston rod (201) and the sleeve (3).

2. The three-stage restoring valve system of the shock absorber according to claim 1, characterized in that: A sealing ring (301) is embedded above the inner wall of the sleeve (3), and third springs (302) arranged in an annular shape and at equal distances are fixedly connected between the sealing ring (301) and the inner wall of the sleeve (3).

3. The three-stage restoring valve system of the shock absorber according to claim 2, characterized in that: The cross section of the sealing ring (301) on the side away from the inner wall of the sleeve (3) is in the shape of a truncated cone that is tilted away from the inner wall of the sleeve (3).

4. The three-stage restoring valve system of the shock absorber according to claim 2, characterized in that: A groove (303) is provided in the middle of a side of the sealing ring (301) away from the inner wall of the sleeve (3).

5. The three-stage restoring valve system of the shock absorber according to claim 1, characterized in that: A shock absorbing plate (304) is embedded in the inner bottom end of the sleeve (3), and a shock absorbing bent plate (306) is fixedly connected between the bottom end of the shock absorbing plate (304) and the bottom end of the inner wall of the sleeve (3).

6. The three-stage restoring valve system of the shock absorber according to claim 5, characterized in that: A second spring (307) is fixedly connected to the gap between the shock-absorbing bent plate (306) and the bottom surface of the inner wall of the sleeve (3), and a plurality of rubber columns (305) are fixedly connected to the top of the shock-absorbing plate (304).

7. The three-stage restoring valve system of the shock absorber according to claim 1, characterized in that: The top end of the three-stage recovery valve system body (1) is located on the outer side of the sleeve (3) and is provided with an air vent (102). The interior of the three-stage recovery valve system body (1) is provided with a storage groove (4). Sound-absorbing cotton (401) is embedded in the interior of the storage groove (4). The cross section of the sound-absorbing cotton (401) is wavy.

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