Three-stage compression valve system of shock absorber

Abstract

The utility model discloses a three-stage compression valve system of a shock absorber, which comprises a three-stage compression valve system main body, the top end of the three-stage compression valve system main body is fixedly connected with a cleaning ring, a piston rod is embedded in the middle of the cleaning ring and the top end of the three-stage compression valve system main body, and the bottom end of the inner wall of the three-stage compression valve system main body is fixedly connected with a shock absorption table. Through the arrangement of a second limiting rod and a second spring, when the piston rod moves downwards along the interior of the three-stage compression valve system body, a buffer plate at the bottom of the piston rod makes contact with a damping table firstly; an annular second spring arranged between the periphery of the top end of the buffer plate and the piston rod can uniformly buffer impact force generated when the buffer plate makes contact with the damping table, and meanwhile, in the process that the buffer plate is stressed to extrude the second spring to move upwards, a second limiting rod can contract into a limiting groove; and the buffer plates are not prone to inclination in the process of extruding the second springs under stress, so that the multiple second springs can be buffered under stress, and the buffering performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring devices, in particular to a three-stage compression valve system of a shock absorber. Background Art

[0002] Hydraulic shock absorbers are widely used in automobile suspension systems. The principle is that when the frame and the axle make reciprocating relative motion and the piston moves back and forth in the cylinder of the shock absorber, the oil in the shock absorber housing repeatedly flows from the inner cavity through some narrow pores into another inner cavity. At this time, the friction between the liquid and the inner wall and the internal friction of the liquid molecules form a damping force on the vibration;

[0003] The existing application number is CN202120143114.7, which is a buffer structure of a compression valve system of an automobile shock absorber. A guide end is arranged on the edge of the buffer seat, and the guide end stabilizes the buffer rod axially according to the slide groove, and generates friction with the slide groove to share the impact force, thereby improving the vibration reduction effect. A first spring and a second spring are arranged to improve the effect of the compression valve system on offsetting the impact force;

[0004] During use, if there is no buffer structure at the bottom of the cone, the piston rod will directly generate impact force when it enters the vibration reduction chamber and contacts the bottom, which may cause damage. Utility Model Content

[0005] The main purpose of the utility model is to provide a three-stage compression valve system for a shock absorber, which can effectively solve the problem in the background technology that when the piston rod enters the shock absorbing chamber and contacts with the bottom, a direct impact force is generated, which is easy to damage the piston rod.

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

[0007] The three-stage compression valve system of the shock absorber comprises a three-stage compression valve system body, a cleaning ring is fixedly connected to the top of the three-stage compression valve system body, a piston rod is embedded in the cleaning ring and the middle of the top of the three-stage compression valve system body, a shock-absorbing platform is fixedly connected to the bottom end of the inner wall of the three-stage compression valve system body, a buffer groove arranged in an annular shape and equidistantly arranged at the top of the shock-absorbing platform is provided, a first limiting rod is embedded in the buffer groove, a first spring is provided between the first limiting rod and the buffer groove, and a shock-absorbing plate is fixedly connected to the top of the first limiting rod.

[0008] Preferably, a base is welded to the bottom end of the main body of the three-stage compression valve system, and an annular sealing ring is embedded in the bottom end of the base.

[0009] Preferably, a brush ring is embedded in the inner wall of the cleaning ring, and the cross section of the cleaning ring is truncated cone-shaped.

[0010] Preferably, a limiting groove is provided in the middle of the bottom end of the piston rod, a second limiting rod is embedded in the limiting groove, a buffer plate is fixedly connected to the bottom end of the second limiting rod, and second springs arranged in a ring shape and at equal distances are fixedly connected between the buffer plate and the piston rod.

[0011] Preferably, a rubber pad is nested at the top end of the second limiting rod.

[0012] Preferably, the buffer groove is provided with an exhaust groove on one side close to the inner wall of the three-stage compression valve system body, a movable shaft is movably connected to the top end of the inner wall of the exhaust groove, a sealing plate is fixedly connected to the bottom end of the movable shaft, and a limiting block is fixedly connected to the sealing plate on one side close to the inner wall of the three-stage compression valve system body.

[0013] Preferably, an iron sheet is embedded in one side of the sealing plate close to the limiting block, the limiting block has magnetic force, and a sealing sheet is fixedly connected to the bottom end of the sealing plate.

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

[0015] 1. The utility model is provided with a second limiting rod and a second spring. When the piston rod moves downward along the inside of the three-stage compression valve system body, the buffer plate at the bottom of the piston rod will first contact the shock-absorbing platform, and the annular second spring arranged around the top of the buffer plate and between the piston rod can evenly buffer the impact force generated when the buffer plate contacts the shock-absorbing platform. At the same time, when the buffer plate is forced to squeeze the second spring and moves upward, the second limiting rod will shrink into the limiting groove, so that the buffer plate is not easy to tilt when it is forced to squeeze the second spring, so that multiple second springs can be buffered by force, thereby improving the buffering performance.

[0016] 2. The utility model is provided with an exhaust groove. When the buffer plate is driven downward by the piston rod to contact and collide with the shock absorbing plate above the shock absorbing platform, the first limiting rod at the bottom of the shock absorbing plate will squeeze the first spring between the buffer groove for buffering. At the same time, when the first limiting rod penetrates into the buffer groove, it will squeeze the air inside the buffer groove, thereby further increasing the buffering and shock absorption efficiency. During the upward movement of the first limiting rod by the elastic force of the first spring, adsorption will be generated in the buffer groove, so that the sealing plate will flip through the movable axis to the side close to the first spring, so that air will enter the buffer groove. At the same time, when the air pressure value inside the buffer groove is sufficient, the sealing plate will flip downward through gravity and the movable axis and be adsorbed through the iron sheet and the limiting block to seal the exhaust groove. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2It is a schematic cross-sectional structure diagram of the main body of the three-stage compression valve system of the three-stage compression valve system of the shock absorber of the utility model;

[0019] Figure 3 The utility model is a three-stage compression valve system of the shock absorber Figure 2 A schematic diagram of the enlarged structure at point A;

[0020] Figure 4 It is a schematic diagram of the partial structure of the piston rod of the three-stage compression valve system of the shock absorber of the utility model;

[0021] Figure 5 It is a schematic diagram of the cleaning ring structure of the three-stage compression valve system of the shock absorber of the utility model;

[0022] Figure 6 The utility model is a schematic diagram of the base structure of the three-stage compression valve system of the shock absorber.

[0023] In the figure: 1. three-stage compression valve system body; 101. shock absorbing platform; 102. buffer groove; 103. first limit rod; 104. first spring; 105. shock absorbing plate; 2. cleaning ring; 201. brush ring; 3. piston rod; 301. limit groove; 302. buffer plate; 303. second limit rod; 304. second spring; 305. rubber pad; 4. exhaust groove; 401. limit block; 402. movable shaft; 403. sealing plate; 404. sealing sheet; 405. iron sheet; 5. base; 501. sealing ring. DETAILED DESCRIPTION

[0024] 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.

[0025] like Figure 1-6 As shown, the three-stage compression valve system of the shock absorber includes a three-stage compression valve system body 1, a cleaning ring 2 is fixedly connected to the top of the three-stage compression valve system body 1, a piston rod 3 is embedded in the cleaning ring 2 and the middle of the top of the three-stage compression valve system body 1, a shock-absorbing platform 101 is fixedly connected to the bottom end of the inner wall of the three-stage compression valve system body 1, and a buffer groove 102 arranged in an annular shape and equidistantly arranged at the top of the shock-absorbing platform 101 is opened, a first limiting rod 103 is embedded in the buffer groove 102, a first spring 104 is arranged between the first limiting rod 103 and the buffer groove 102, and a shock-absorbing plate 105 is fixedly connected to the top of the first limiting rod 103.

[0026] In this embodiment, a base 5 is welded to the bottom end of the three-stage compression valve body 1, and an annular sealing ring 501 is embedded in the bottom end of the base 5.

[0027] Specifically, when the three-stage compression valve system body 1 is fixed to the required position through the base 5, the sealing ring 501 will fit tightly to the fixed surface due to the extrusion between the base 5 and the contact surface, making it difficult for moisture to enter the gap between the base 5 and the fixed surface in humid seasons, thereby increasing the service life.

[0028] In this embodiment, a brush ring 201 is embedded in the inner wall of the cleaning ring 2, and the cross section of the cleaning ring 2 is in a truncated cone shape.

[0029] Specifically, since the piston rod 3 is exposed to the outside world, dust and impurities are easily attached to the outer surface of the piston rod 3. When the piston rod 3 enters the three-stage compression valve system body 1, the brush ring 201 inside the cleaning ring 2 will scrape and clean the outer side of the piston rod 3, making it difficult for dust and impurities to enter the three-stage compression valve system body 1, and the outer surface of the piston rod 3 is not easily attached to dust and impurities to cause corrosion damage.

[0030] In this embodiment, a limiting groove 301 is opened in the middle of the bottom end of the piston rod 3, and a second limiting rod 303 is embedded in the limiting groove 301. A buffer plate 302 is fixedly connected to the bottom end of the second limiting rod 303. A second spring 304 arranged in a ring shape and at equal distances is fixedly connected between the buffer plate 302 and the piston rod 3. A rubber pad 305 is nested at the top of the second limiting rod 303.

[0031] Specifically, when the piston rod 3 contacts the shock absorbing plate 105 above the shock absorbing platform 101 downward, the buffer plate 302 at the bottom of the piston rod 3 will first contact the shock absorbing plate 105, and the shock absorbing plate 105 will squeeze the second spring 304 to buffer the impact force between the piston rod 3 and the shock absorbing platform 101. At the same time, the buffer plate 302 squeezes the second spring 304 and moves up and down, so that the second limiting rod 303 will be stuck in the limiting groove 301 to limit the buffer plate 302, so that the buffer plate 302 is not easy to tilt, and the second spring 304 can be evenly buffered.

[0032] In the present embodiment, an exhaust groove 4 is provided on the side of the buffer groove 102 close to the inner wall of the three-stage compression valve system body 1, and a movable shaft 402 is movably connected to the top of the inner wall of the exhaust groove 4, and a sealing plate 403 is fixedly connected to the bottom end of the movable shaft 402. The bottom end of the inner wall of the exhaust groove 4 is located at the side of the sealing plate 403 close to the inner wall of the three-stage compression valve system body 1 and is fixedly connected to a limiting block 401. An iron sheet 405 is embedded on the side of the sealing plate 403 close to the limiting block 401, and the limiting block 401 has magnetic force. The bottom end of the sealing plate 403 is fixedly connected to a sealing sheet 404.

[0033] Working principle:

[0034] First, when the three-stage compression valve system body 1 is fixed to the required position through the base 5, the sealing ring 501 will fit closely to the fixed surface due to the extrusion between the base 5 and the contact surface, so that moisture is not easy to enter the gap between the base 5 and the fixed surface in humid seasons. Then, when the piston rod 3 enters the three-stage compression valve system body 1, the brush ring 201 inside the cleaning ring 2 will scrape and clean the outer side of the piston rod 3, so that dust and impurities are not easy to enter the three-stage compression valve system body 1. Finally, when the piston rod 3 contacts the shock-absorbing plate 105 above the shock-absorbing platform 101 downward, the buffer plate 302 at the bottom of the piston rod 3 will first contact the shock-absorbing plate 105, and the shock-absorbing plate 105 will squeeze the second spring 304 to buffer the impact force between the piston rod 3 and the shock-absorbing platform 101. At the same time, the buffer plate 302 squeezes the second spring 304 and moves up and down, so that the second limit rod 303 is inserted into the limit groove 301 to limit and support the buffer plate 302, so that the buffer plate 302 is not easy to tilt, and the second spring 304 can be evenly force-buffered.

[0035] 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 compression valve system for a shock absorber, comprising a three-stage compression valve system body (1), characterized in that: A cleaning ring (2) is fixedly connected to the top of the three-stage compression valve system body (1); a piston rod (3) is embedded in the cleaning ring (2) and the middle of the top of the three-stage compression valve system body (1); a shock-absorbing platform (101) is fixedly connected to the bottom end of the inner wall of the three-stage compression valve system body (1); a buffer groove (102) arranged in an annular shape and at equal distances is formed at the top of the shock-absorbing platform (101); a first limiting rod (103) is embedded in the buffer groove (102); a first spring (104) is arranged between the first limiting rod (103) and the buffer groove (102); and a shock-absorbing plate (105) is fixedly connected to the top of the first limiting rod (103).

2. The three-stage compression valve system of the shock absorber according to claim 1, characterized in that: A base (5) is welded to the bottom end of the three-stage compression valve system body (1), and an annular sealing ring (501) is embedded in the bottom end of the base (5).

3. The three-stage compression valve system of the shock absorber according to claim 1, characterized in that: A brush ring (201) is embedded in the inner wall of the cleaning ring (2); the cross section of the cleaning ring (2) is in the shape of a truncated cone.

4. The three-stage compression valve system of the shock absorber according to claim 1, characterized in that: A limiting groove (301) is provided in the middle of the bottom end of the piston rod (3), a second limiting rod (303) is embedded in the limiting groove (301), a buffer plate (302) is fixedly connected to the bottom end of the second limiting rod (303), and second springs (304) arranged in an annular shape and at equal distances are fixedly connected between the buffer plate (302) and the piston rod (3).

5. The three-stage compression valve system of the shock absorber according to claim 4, characterized in that: A rubber pad (305) is nested at the top end of the second limiting rod (303).

6. The three-stage compression valve system of the shock absorber according to claim 1, characterized in that: The buffer groove (102) is provided with an exhaust groove (4) on one side of the inner wall close to the three-stage compression valve system body (1); a movable shaft (402) is movably connected to the top end of the inner wall of the exhaust groove (4); a sealing plate (403) is fixedly connected to the bottom end of the movable shaft (402); and a limiting block (401) is fixedly connected to the bottom end of the inner wall of the exhaust groove (4) located on the side of the sealing plate (403) close to the inner wall of the three-stage compression valve system body (1).

7. The three-stage compression valve system of the shock absorber according to claim 6, characterized in that: An iron sheet (405) is embedded in one side of the sealing plate (403) close to the limiting block (401); the limiting block (401) has magnetic force; and a sealing sheet (404) is fixedly connected to the bottom end of the sealing plate (403).

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