Damping valve structure of automobile shock absorber

Abstract

The utility model discloses a damping valve structure of an automobile shock absorber, which comprises a steering knuckle, a fixed arm, a shock-absorbing seat and a mounting top tray, in the using process of the damping valve structure, a buffer spring directly connected with the bottom of the mounting top tray can reduce the stroke length of the mounting top tray when the mounting top tray is compressed, so that the shock-absorbing effect is improved. Excessive bumping of a driver and passengers in the back row caused by excessive reciprocating vibration of the mounting top tray is avoided, the normal driving feeling of a vehicle is guaranteed, meanwhile, a buffer spring can absorb energy and consume vibration, excessive loss of a damping seat area at the bottom of the mounting top tray is reduced, and the service life of the vehicle is prolonged. The flow choking blocks arranged on the inner wall of the buffering outer cavity at intervals can slow down the flow speed of hydraulic oil, compression of the hydraulic oil on filling gas is reduced, kinetic energy borne by the hydraulic oil part is consumed, the shock absorption seat part can absorb vibration transmitted by wheels to a larger extent on a long bumpy road section, the mechanical life of a buffering spring is prolonged, and the service life of the buffering spring is prolonged. And the service life of the automobile shock absorber damper is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile shock absorbers, in particular to a damping valve structure of an automobile shock absorber. Background Art

[0002] Shock absorbers are used to dampen the rebound oscillations caused by springs absorbing shock and to reduce road impact. They are widely used in automobiles to accelerate the attenuation of frame and body vibrations, improving ride smoothness. While shock-absorbing springs can filter out road vibrations when driving over uneven surfaces, the springs themselves still experience reciprocating motion, and shock absorbers are designed to dampen this spring bounce.

[0003] In a suspension system, vibrations are generated by impacts on elastic elements. To improve a vehicle's ride comfort, shock absorbers are installed in parallel with the elastic elements. To dampen vibrations, hydraulic shock absorbers are often used in automotive suspension systems. Their operating principle is that when the vehicle frame and axle experience relative motion due to vibration, the piston inside the shock absorber moves up and down, causing the oil in the shock absorber cavity to repeatedly flow from one cavity to another through different pores. Friction between the pore walls and the oil, as well as internal friction between the oil molecules, creates a damping force on the vibrations, converting the vehicle's vibration energy into heat energy, which is then absorbed by the shock absorber and dissipated into the atmosphere. For factors such as the oil channel cross-section and the pressure, the damping force increases or decreases with the relative speed between the frame and axle and is related to the oil's viscosity.

[0004] The shock absorber and elastic element bear the task of buffering shock and reducing vibration. If the damping force is too large, the suspension elasticity will deteriorate and even the shock absorber connection parts will be damaged. Therefore, it is necessary to adjust the contradiction between the elastic element and the shock absorber.

[0005] Publication No. CN208397199U discloses a shock absorber mounting structure for an automobile, comprising a piston rod, a cylinder, a return spring, an end shock absorber connector, a damping orifice, and an oil reservoir. The front shock absorber connector on the piston rod is connected to a fixed connecting plate via a fixed pin. A shock absorber spring is disposed on the outside of the cylinder. The upper and lower ends of the return spring are connected to spring retainer mounting holes on a first and second fixed sleeves, respectively, via return spring retainers. The end shock absorber connector is connected to a support plate via a shock absorber mounting base. A piston is disposed inside the damping orifice, and a compression valve is mounted at the bottom of the oil reservoir. This shock absorber mounting structure increases the spring's load-bearing area, making it less susceptible to damage. It also exerts a certain pulling force on the shock absorber spring, resolving the problem of jolting caused by repeated movement of the shock absorber spring. It offers excellent overall shock absorption, a rational structural design, and strong practicality.

[0006] However, the existing technology still has major deficiencies, such as:

[0007] In the above-mentioned device and the prior art, the shock-absorbing damper achieves the effect of energy absorption and shock absorption through dual buffering of internal oil and external buffer spring during use. However, the energy absorption and buffering through the oil part cannot bear a large energy absorption load. When encountering a long bumpy road section, the external buffer spring will cause frequent use to overheat and cause excessive loss, affecting the shock absorption effect of the shock-absorbing damper. Utility Model Content

[0008] The purpose of the utility model is to provide a damping valve structure of an automobile shock absorber to solve the problems raised in the above background technology.

[0009] To achieve the above-mentioned object, the present invention provides the following technical solution: a damping valve structure for an automobile shock absorber, comprising a steering knuckle, a fixed arm, a shock absorber seat, and a mounting top plate, wherein the fixed arm is mounted on the top of the steering knuckle, the shock absorber seat is disposed on the top of the fixed arm, a sliding rod is disposed on the top of the shock absorber seat, and the mounting top plate is disposed in the top area of ​​the sliding rod;

[0010] The shock absorber damping and buffering energy absorbing unit is arranged inside the shock absorber seat and is used to absorb and buffer the bumps and vibrations generated during the driving of the car, thereby reducing the mechanical loss of the shock absorber.

[0011] Preferably, the shock absorber damping buffer energy absorption unit includes an energy absorption part, the energy absorption part includes a piston head, the piston head is installed at the bottom of the sliding rod, the surface of the shock absorber seat is provided with a buffer inner cavity, the interior of the shock absorber seat is provided with a buffer outer cavity, the buffer inner cavity and the buffer outer cavity are connected, the buffer inner cavity and the buffer outer cavity connection area are provided with a connecting pipe, the internal interval of the buffer outer cavity is installed with a flow block, the surface of the flow block is provided with an arc shape, and the interior of the buffer outer cavity is also provided with a diversion column.

[0012] Preferably, the shock absorber damping and buffering energy absorption unit also includes a buffer part, the buffer part includes a rebound block, the rebound block is sleeved on the surface of the sliding rod near the piston head area, the rebound block is in active contact with the top of the buffer inner cavity, a limiting ring is installed on the outer surface of the shock absorber seat, a limiting block is provided on the top of the limiting ring, a buffer spring is installed on the top of the limiting block, the buffer spring is sleeved on the outer surface of the shock absorber seat, and one end of the buffer spring is in contact with the bottom of the mounting top plate.

[0013] Preferably, a dust cover is further provided on the top of the shock-absorbing seat, and the dust cover is sleeved on the surface of the sliding rod.

[0014] Preferably, a shock-absorbing and buffering transmission structure is provided at the bottom of the steering knuckle.

[0015] Preferably, the shock-absorbing and buffering transmission structure includes a mounting seat, which is mounted on the surface of the steering knuckle, a connecting rod arm is rotatably mounted on the mounting seat, the bottom of the connecting rod arm is connected to the movable end of the universal joint, a mounting frame is mounted on the bottom of the universal joint, a mounting shaft is mounted on the surface of the mounting frame, and a fixed seat is also mounted on the surface of the steering knuckle.

[0016] Preferably, the buffer inner cavity and the buffer outer cavity are filled with hydraulic oil, and the area above the hydraulic oil level in the buffer outer cavity is filled with helium gas or nitrogen gas.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. During use, the buffer spring directly connected to the bottom of the top plate will reduce the travel length of the top plate when it is compressed, preventing excessive reciprocating vibration of the top plate, which may cause excessive bumps for the driver and rear passengers, ensuring a normal driving experience. At the same time, the buffer spring will absorb the vibration energy, reducing excessive wear and tear in the shock absorber area at the bottom of the top plate, and extending the service life of the vehicle's shock absorber.

[0019] 2. When in use, the flow blocks arranged at intervals on the inner wall of the buffer outer cavity will slow down the flow rate of the hydraulic oil and reduce the compression of the filling gas by the hydraulic oil, thereby consuming the kinetic energy carried by the hydraulic oil. This allows the shock absorber seat to absorb the vibration transmitted by the wheel to a greater extent on long bumpy roads, thereby reducing the load on the buffer spring, improving the mechanical life of the buffer spring, and further improving the service life of the automobile shock absorber damping. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an overall schematic diagram of the device of the utility model;

[0021] Figure 2 This is a partial schematic diagram of the limiting ring and limiting block in the utility model;

[0022] Figure 3 This is a schematic diagram of the sliding rod portion of the utility model;

[0023] Figure 4 It is a partial schematic diagram of the buffer inner cavity and buffer outer cavity in the utility model.

[0024] In the figure: 1. Steering knuckle; 11. Fixed seat; 12. Mounting seat; 13. Connecting rod arm; 14. Universal joint; 2. Fixed arm; 3. Shock absorber seat; 31. Dust cover; 32. Buffer inner cavity; 321. Buffer outer cavity; 322. Flow block; 323. Diverter column; 33. Connecting pipe; 34. Piston head; 35. Sliding rod; 36. Rebound block; 4. Buffer spring; 5. Mounting top plate; 6. Mounting frame; 61. Mounting shaft; 7. Limiting ring; 71. Limiting block. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-4 , the utility model provides a technical solution:

[0027] Example 1: A damping valve structure for an automobile shock absorber includes a steering knuckle 1, a fixed arm 2, a shock absorber seat 3, and a mounting top plate 5. The fixed arm 2 is mounted on the top of the steering knuckle 1, the shock absorber seat 3 is disposed on the top of the fixed arm 2, a sliding rod 35 is disposed on the top of the shock absorber seat 3, and the mounting top plate 5 is disposed in the top area of ​​the sliding rod 35.

[0028] The shock absorber damping and buffering energy absorbing unit is arranged inside the shock absorber seat 3, and is used to absorb and buffer the bumps and vibrations generated during the driving of the car, thereby reducing the mechanical loss of the shock absorber.

[0029] The shock absorber damping and buffering energy absorption unit includes an energy absorption part, which includes a piston head 34. The piston head 34 is installed at the bottom of the slide rod 35. A buffer inner cavity 32 is provided on the surface of the shock absorber seat 3. A buffer outer cavity 321 is provided inside the shock absorber seat 3. The buffer inner cavity 32 and the buffer outer cavity 321 are connected. A connecting pipe 33 is provided in the connection area between the buffer inner cavity 32 and the buffer outer cavity 321. A flow blocking block 322 is installed in the internal interval of the buffer outer cavity 321. The surface of the flow blocking block 322 is set to an arc shape, and a diversion column 323 is also provided inside the buffer outer cavity 321.

[0030] The shock absorber damping and buffering energy absorption unit also includes a buffer part, which includes a rebound block 36. The rebound block 36 is sleeved on the surface of the slide rod 35 near the piston head 34. The rebound block 36 is in active contact with the top of the buffer inner cavity 32. A limiting ring 7 is installed on the outer surface of the shock absorber seat 3, and a limiting block 71 is set on the top of the limiting ring 7. A buffer spring 4 is installed on the top of the limiting block 71. The buffer spring 4 is sleeved on the outer surface of the shock absorber seat 3, and one end of the buffer spring 4 is in contact with the bottom of the mounting top plate 5.

[0031] A dust cover 31 is further provided on the top of the shock absorbing seat 3 , and the dust cover 31 is sleeved on the surface of the sliding rod 35 .

[0032] The buffer inner cavity 32 and the buffer outer cavity 321 are filled with hydraulic oil, and the area above the hydraulic oil level in the buffer outer cavity 321 is filled with helium gas or nitrogen gas.

[0033] In this embodiment, the hydraulic oil will first be diverted and buffered by the diverter column 323 located in the buffer outer cavity 321, and the diverted hydraulic oil will enter the buffer outer cavity 321. The baffle blocks 322 arranged at intervals on the inner wall of the buffer outer cavity 321 will slow down the flow rate of the hydraulic oil and reduce the compression of the filling gas by the hydraulic oil, so that the kinetic energy carried by the hydraulic oil can be consumed, so that the shock absorber seat 3 can absorb the vibration transmitted by the wheel to a greater extent on long bumpy roads, so as to reduce the load of the buffer spring 4, improve the mechanical life of the buffer spring 4, and further improve the service life of the automobile shock absorber damping.

[0034] A shock-absorbing and buffering transmission structure is provided at the bottom of the steering knuckle 1.

[0035] The shock-absorbing and buffering transmission structure includes a mounting seat 12, which is mounted on the surface of the steering knuckle 1. A connecting arm 13 is rotatably mounted on the mounting seat 12. The bottom of the connecting arm 13 is connected to the movable end of the universal joint 14. A mounting frame 6 is mounted on the bottom of the universal joint 14. A mounting shaft 61 is mounted on the surface of the mounting frame 6. A fixing seat 11 is also mounted on the surface of the steering knuckle 1.

[0036] In this embodiment, during the deflection process, the deflection generated by the universal joint 14 is transmitted to the mounting top plate 5 and the fixed arm 2 connected to the wheel. This structure can limit the excessive deflection of the wheel in the non-active state, avoid excessive impact of the wheel on the driving direction area on bumpy roads, and ensure the normal driving of the vehicle wheels;

[0037] Working principle: When using this device, the operator can install the shock absorber on the subframe through the mounting shaft 61, and then the operator can install the wheel part to the mounting top plate 5 area. Then, when the driver drives the vehicle and encounters a bumpy road section, the wheel will continuously deflect when it contacts the bumpy road section. During the deflection process, the deflection generated by the universal joint 14 will be transmitted to the mounting top plate 5 and the fixed arm 2 part connected to the wheel. This part of the structure can limit the excessive deflection of the wheel in a non-active state, avoid the excessive impact of the wheel on the driving direction area on the bumpy road section, and ensure the normal driving of the vehicle wheel.

[0038] When driving on a bumpy road, the wheel will vibrate violently when it contacts the bumpy road. The wheel will initially absorb the vibration and then transmit the vibration to the mounting top plate 5. The buffer spring 4 directly connected to the bottom of the mounting top plate 5 will reduce the stroke length of the mounting top plate 5 when the mounting top plate 5 is compressed, thereby avoiding excessive reciprocating vibration of the mounting top plate 5, which would cause excessive bumps to the driver and rear passengers, ensuring a normal driving experience of the vehicle. At the same time, the buffer spring 4 will absorb the vibration energy, reduce excessive wear and tear in the area of ​​the shock absorber seat 3 at the bottom of the mounting top plate 5, and extend the service life of the vehicle's shock absorber damping.

[0039] When the mounting top plate 5 is deformed, the mounting top plate 5 will compress the sliding rod 35 and move downward. When the sliding rod 35 moves downward, it will squeeze the hydraulic oil part at the bottom of the piston head 34 through the piston head 34 to flow. At this time, the hydraulic oil inside the buffer inner cavity 32 will quickly flow into the buffer outer cavity 321 through the connecting pipe 33. In the process of the hydraulic oil flowing into the buffer outer cavity 321, the hydraulic oil will first be diverted and buffered by the diverter column 323 located in the buffer outer cavity 321. The diverted hydraulic oil will enter the buffer outer cavity 321. The flow blocking blocks 322 arranged at intervals on the inner wall of the buffer outer cavity 321 will slow down the flow rate of the hydraulic oil and reduce the compression of the filling gas by the hydraulic oil, so that the kinetic energy carried by the hydraulic oil part can be consumed, so that the shock absorber seat 3 part can absorb the vibration transmitted by the wheel to the greatest extent on long bumpy roads, so as to reduce the load of the buffer spring 4, improve the mechanical life of the buffer spring 4, and further improve the service life of the automobile shock absorber damping.

[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A damping valve structure for an automobile shock absorber, characterized in that: The invention comprises a steering knuckle (1), a fixed arm (2), a shock absorbing seat (3) and a mounting top plate (5), wherein the fixed arm (2) is mounted on the top of the steering knuckle (1), the shock absorbing seat (3) is arranged on the top of the fixed arm (2), a sliding rod (35) is arranged on the top of the shock absorbing seat (3), and the mounting top plate (5) is arranged in the top area of ​​the sliding rod (35); A shock absorber damping and buffering energy absorbing unit is provided inside the shock absorber seat (3) and is used for absorbing and buffering the bumping vibration generated during the driving of the vehicle, thereby reducing the mechanical loss of the shock absorber.

2. The automobile shock absorber damping valve structure according to claim 1, characterized in that: The shock absorber damping and buffering energy absorption unit includes an energy absorption part, which includes a piston head (34). The piston head (34) is installed at the bottom of the slide rod (35). The surface of the shock absorber seat (3) is provided with a buffer inner cavity (32). The interior of the shock absorber seat (3) is provided with a buffer outer cavity (321). The buffer inner cavity (32) and the buffer outer cavity (321) are connected. A connecting pipe (33) is provided in the connection area between the buffer inner cavity (32) and the buffer outer cavity (321). A flow block (322) is installed at an interval inside the buffer outer cavity (321). The surface of the flow block (322) is set to be arc-shaped. A diversion column (323) is also provided inside the buffer outer cavity (321).

3. The automobile shock absorber damping valve structure according to claim 2, characterized in that: The shock absorber damping and buffering energy absorption unit also includes a buffer part, and the buffer part includes a rebound block (36). The rebound block (36) is sleeved on the surface of the slide rod (35) near the piston head (34). The rebound block (36) is in active contact with the top of the buffer inner cavity (32). A limiting ring (7) is installed on the outer surface of the shock absorber seat (3). A limiting block (71) is provided on the top of the limiting ring (7). A buffer spring (4) is installed on the top of the limiting block (71). The buffer spring (4) is sleeved on the outer surface of the shock absorber seat (3). One end of the buffer spring (4) is in contact with the bottom of the mounting top plate (5).

4. The automobile shock absorber damping valve structure according to claim 3, characterized in that: A dust cover (31) is also provided on the top of the shock-absorbing seat (3), and the dust cover (31) is sleeved on the surface of the sliding rod (35).

5. The automobile shock absorber damping valve structure according to claim 4, characterized in that: A shock-absorbing and buffering transmission structure is provided at the bottom of the steering knuckle (1).

6. The automobile shock absorber damping valve structure according to claim 1, characterized in that: The shock-absorbing and buffering transmission structure comprises a mounting seat (12), the mounting seat (12) being mounted on the surface of the steering knuckle (1), a connecting rod arm (13) being rotatably mounted on the mounting seat (12), the bottom of the connecting rod arm (13) being connected to the movable end of a universal joint (14), a mounting frame (6) being mounted on the bottom of the universal joint (14), a mounting shaft (61) being mounted on the surface of the mounting frame (6), and a fixing seat (11) being further mounted on the surface of the steering knuckle (1).

7. The automobile shock absorber damping valve structure according to claim 1, characterized in that: The buffer inner cavity (32) and the buffer outer cavity (321) are filled with hydraulic oil, and the hydraulic oil level inside the buffer outer cavity (321) is filled with helium gas or nitrogen gas.

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