Oil pressure type shock absorber bottom valve

Abstract

The utility model relates to the technical field of shock absorber bottom valves, and discloses an oil pressure type shock absorber bottom valve which comprises a shock absorber outer barrel, an oil cylinder is arranged on the inner side of the shock absorber outer barrel, a bottom valve body is fixedly installed on the bottom side of the inner side of the shock absorber outer barrel, and a guider is arranged between the upper end of the oil cylinder and the shock absorber outer barrel. Hydraulic oil enters the inner side of the oil overflow cavity and pushes the extrusion plate to move, then resistance is increased for buffering, the buffer valve is pressed to move when the hydraulic oil is pushed to the oil groove, then the adjusting base is pushed to be clamped with the buffer base, the connecting rod is driven to pull the second choke valve to move, and therefore the hydraulic oil conveniently enters the oil groove; and in the moving process of the first choke valve and the buffer valve, through the action of a reset spring and a buffer spring, resistance is generated in the pushing process of the piston body, part of pressure is decomposed preferentially, and then the buffer effect is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of shock absorber bottom valves, specifically a hydraulic shock absorber bottom valve. Background Technology

[0002] Hydraulic damping is a common vibration reduction method in the automotive industry. A piston is installed in the automotive shock absorber, and a shock absorber outer cylinder is fitted outside the piston. An oil chamber is formed between the piston shell and the shock absorber outer cylinder. Both the oil chamber and the piston shell are filled with hydraulic oil. A bottom valve is installed at the bottom of the piston shell. The piston rod and the shock absorber outer cylinder are respectively installed on the vehicle body and wheel assembly. When the car vibrates up and down during driving, the piston reciprocates in the piston cylinder.

[0003] According to the search, Chinese patent document, publication number CN213628652U, discloses a hydraulic shock absorber bottom valve. By setting an elastic element, during the compression process of the hydraulic shock absorber, the elastic element first provides the hydraulic oil with a "first stage" compression force value in the bottom valve, and then the valve plate provides the hydraulic oil with a "second stage" compression force value. Due to the transition of the tower spring, the connection between the damping force value provided by the piston and the damping force value provided by the valve plate in the hydraulic shock absorber is more gradual. For passengers in the car, this improves the riding experience and comfort when the car is subjected to slight bumps. When the hydraulic shock absorber returns to its original state, the hydraulic oil flows upward from the bottom of the valve seat channel. At this time, it can flow directly through the valve seat channel and the valve cap channel through the bottom valve of the hydraulic shock absorber without overcoming any restoring force value. Therefore, it achieves the effect of rapid oil replenishment and improves the safety of the car when encountering larger bumps. However, during use, although the wave spring can drive the compression valve body to move and reset, it can be under pressure for a long time, which can easily reduce the recovery effect of the compression valve body. This can affect the valve opening and closing, reduce the buffering effect and the flow rate of the hydraulic oil, thus reducing the overall service life. Furthermore, the buffering protection of the piston is greatly reduced, which can easily lead to increased piston friction and damage. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a hydraulic shock absorber bottom valve, which has the advantages of high-efficiency buffering effect, improved service life, and effective buffering protection for the piston, thereby avoiding severe piston wear, thus solving the above-mentioned technical problems.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic shock absorber bottom valve, comprising a shock absorber outer cylinder, an oil cylinder disposed on the inner side of the shock absorber outer cylinder, a bottom valve body fixedly installed on the bottom side of the inner side of the shock absorber outer cylinder, a guide disposed between the upper end of the oil cylinder and the shock absorber outer cylinder, a piston rod disposed on the inner side of the guide and the shock absorber outer cylinder, a piston seat fixedly installed at the top end of the piston rod, an oil overflow chamber disposed between the shock absorber outer cylinder and the oil cylinder, a first flow-blocking valve and a second flow-blocking valve disposed on the inner side of the bottom valve body, a buffer valve movably mounted on the top side of the bottom valve body, a buffer base and an adjusting seat disposed on the inner side of the bottom valve body, and an oil groove opened on the top side of the bottom valve body.

[0008] Preferably, a guide cylinder is fixedly installed on the outer side of the shock absorber outer cylinder, a guide plate is fixedly installed on the outer side of the piston seat, a total of four guide plates are provided, and a piston body is fixedly installed at the bottom end of the piston rod.

[0009] With the above technical solution, the four guide plates can move inside the guide cylinder, which helps to improve the stability during buffering and shock absorption, while also improving the uniformity and guiding effect of the shock absorber body, making it more stable during use.

[0010] Preferably, a squeezing plate is movably installed on the inner side of the oil overflow chamber, a fixing column is fixedly installed on the top side of the squeezing plate, and a squeezing spring is fixedly installed between the fixing column and the oil cylinder. The fixing column and the squeezing spring are a set, and a total of four sets are provided. The squeezing plate has a circular structure.

[0011] Through the above technical solution, under the action of the extrusion plate and the extrusion spring, it is beneficial to improve the return effect when the hydraulic oil returns, thereby increasing the reset rate of the piston body, improving the buffer quality, and reducing resistance during buffering, thus improving the buffering efficiency.

[0012] Preferably, a return spring is fixedly installed between the side of the first flow-blocking valve away from the second flow-blocking valve and the bottom valve body. A movable seat is provided at the end of the second flow-blocking valve away from the first flow-blocking valve. A connecting rod is movably installed on the inner side of the movable seat through a bearing. An adjusting seat and the movable seat are connected at the end of the connecting rod away from the second flow-blocking valve. The first flow-blocking valve, the second flow-blocking valve and the oil tank are a group, and a total of four groups are provided.

[0013] Through the above technical solution, during buffering and shock absorption, the hydraulic oil pushes the first flow control valve to slide, and then the hydraulic oil enters the inner side of the overflow chamber and pushes the extrusion plate to move, thereby increasing the resistance for buffering. At the same time as the hydraulic oil is pushed towards the oil tank, the buffer valve is pressed and moves, thereby pushing the adjusting seat to engage with the buffer base, driving the connecting rod to pull the second flow control valve to move, thus facilitating the hydraulic oil to enter the oil tank, improving the hydraulic oil flow efficiency, and thus improving the buffering rate.

[0014] Preferably, a buffer rod and a buffer cylinder are fixedly installed between the buffer valve and the bottom valve body, respectively. The buffer rod is movably installed inside the buffer cylinder, and a buffer spring is fixedly installed between the buffer rod and the buffer cylinder. The buffer rod and the buffer cylinder form a set, and a total of four sets are provided.

[0015] With the above technical solution, when the piston body contacts the buffer valve, the buffer spring buffers the impact, and the positioning groove and rubber seat squeeze and engage, which can effectively reduce the impact force between the piston body and the buffer valve, thereby reducing the impact and improving the service life of the piston body.

[0016] Preferably, the bottom side of the adjusting seat is provided with a positioning groove, the buffer base has a concave structure, and a rubber seat is fixedly installed on the inner side of the buffer base. The size and shape of the rubber seat match the positioning groove, and a limit spring is fixedly installed between the adjusting seat and the buffer base.

[0017] Through the above technical solution, under the action of the limit spring, the impact when the piston body contacts the buffer valve can be effectively reduced, while the stability when the adjusting seat moves can be improved. Furthermore, under the action of the rubber seat, the buffering effect and resistance elasticity can be further improved, thus increasing the overall service life.

[0018] Compared with the prior art, this utility model provides a hydraulic shock absorber bottom valve, which has the following characteristics:

[0019] Beneficial effects:

[0020] 1. This utility model uses hydraulic oil to enter the inner side of the overflow chamber and push the extrusion plate to move, thereby increasing the resistance for buffering. At the same time as the hydraulic oil is pushed towards the oil tank, the buffer valve is pressed and moves, which in turn pushes the adjusting seat to engage with the buffer base, driving the connecting rod to pull the second flow control valve to move, thereby facilitating the entry of hydraulic oil into the oil tank, improving the hydraulic oil flow efficiency, and thus improving the buffering rate. Moreover, during the movement of the first flow control valve and the buffer valve, the action of the return spring and the buffer spring helps to generate resistance during the piston body's push, preferentially decomposing part of the pressure, thereby improving the buffering effect.

[0021] 2. When the piston body contacts the buffer valve, the present invention uses a buffer spring for buffering, and the positioning groove and rubber seat squeeze and engage, which can effectively reduce the impact force between the piston body and the buffer valve, thereby reducing the impact and improving the service life of the piston body. The combination of multiple sets of reset springs, buffer springs and limit springs can improve the pressure resistance of the bottom valve body, thereby simultaneously dispersing the pressure and improving the service life and years. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0023] Figure 2 This is a front view cross-sectional structural diagram of the outer cylinder of the shock absorber of this utility model;

[0024] Figure 3 This is a three-dimensional structural diagram of the bottom valve body of this utility model;

[0025] Figure 4 This utility model Figure 2 Enlarged structural diagram at point A in the diagram;

[0026] Figure 5 This utility model Figure 2 A magnified structural diagram at point B in the diagram.

[0027] The components are as follows: 1. Shock absorber outer cylinder; 2. Oil cylinder; 3. Bottom valve body; 4. Guide; 5. Piston rod; 6. Piston seat; 7. Overflow chamber; 8. No. 1 flow control valve; 9. No. 2 flow control valve; 10. Buffer valve; 11. Buffer base; 12. Adjusting seat; 13. Oil tank; 101. Guide cylinder; 601. Guide plate; 501. Piston body; 701. Extrusion plate; 702. Fixed column; 801. Return spring; 901. Movable seat; 902. Connecting rod; 1001. Buffer cylinder; 1002. Buffer rod; 1101. Rubber seat; 1102. Limit spring; 1201. Positioning groove. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1:

[0030] like Figure 1-5 As shown, the present invention provides a hydraulic shock absorber bottom valve, including a shock absorber outer cylinder 1, an oil cylinder 2 disposed inside the shock absorber outer cylinder 1, a bottom valve body 3 fixedly installed on the bottom side of the inner side of the shock absorber outer cylinder 1, a guide 4 disposed between the upper end of the oil cylinder 2 and the shock absorber outer cylinder 1, a piston rod 5 disposed between the guide 4 and the inner side of the shock absorber outer cylinder 1, a piston seat 6 fixedly installed at the top of the piston rod 5, an overflow chamber 7 disposed between the shock absorber outer cylinder 1 and the oil cylinder 2, a first flow-blocking valve 8 and a second flow-blocking valve 9 disposed inside the bottom valve body 3, a buffer valve 10 movably installed on the top side of the bottom valve body 3, a buffer base 11 and an adjusting seat 12 disposed inside the bottom valve body 3 respectively, and an oil groove 13 opened on the top side of the bottom valve body 3.

[0031] Specifically, a guide cylinder 101 is fixedly installed on the outer side of the outer cylinder 1 of the shock absorber, and a guide plate 601 is fixedly installed on the outer side of the piston seat 6. A total of four guide plates 601 are provided, and the piston body 501 is fixedly installed at the bottom end of the piston rod 5. The advantage is that the movement of the four guide plates 601 within the guide cylinder 101 improves stability during shock absorption and damping, while also enhancing the uniformity and guiding effect of the shock absorber body, resulting in smoother operation.

[0032] Specifically, a squeeze plate 701 is movably installed inside the oil overflow chamber 7, and a fixing post 702 is fixedly installed on the top side of the squeeze plate 701. A compression spring is fixedly installed between the fixing post 702 and the oil cylinder 2. The fixing post 702 and the compression spring form a group, and a total of four groups are provided. The squeeze plate 701 has a circular structure. The advantage is that the action of the squeeze plate 701 and the compression spring facilitates the return flow of hydraulic oil, thereby increasing the reset rate of the piston body 501, improving the buffering quality, and reducing resistance during buffering, thus improving the buffering efficiency.

[0033] Specifically, a return spring 801 is fixedly installed between the side of the first flow control valve 8 away from the second flow control valve 9 and the bottom valve body 3. A movable seat 901 is provided at the end of the second flow control valve 9 away from the first flow control valve 8. A connecting rod 902 is movably installed on the inner side of the movable seat 901 through a bearing. The end of the connecting rod 902 away from the second flow control valve 9 is connected to the adjusting seat 12 and the movable seat 901. The first flow control valve 8, the second flow control valve 9, and the oil tank 13 form a group, and a total of four groups are provided. The advantage is that the first flow control valve 8 is pushed to slide by hydraulic oil, and then the hydraulic oil enters the inner side of the overflow chamber 7 and pushes the extrusion plate 701 to move, thereby increasing the resistance for buffering. At the same time as the hydraulic oil pushes towards the oil tank 13, the buffer valve 10 is pressed and moves, thereby pushing the adjusting seat 12 to engage with the buffer base 11, driving the connecting rod 902 to pull the second flow control valve 9 to move, thus facilitating the entry of hydraulic oil into the oil tank 13, improving the hydraulic oil flow efficiency, and thus improving the buffering rate.

[0034] Example 2:

[0035] like Figure 1-5 As shown, as an improvement on the previous embodiment, specifically, a buffer rod 1002 and a buffer cylinder 1001 are fixedly installed between the buffer valve 10 and the bottom valve body 3, respectively. The buffer rod 1002 is movably installed inside the buffer cylinder 1001, and a buffer spring is fixedly installed between the buffer rod 1002 and the buffer cylinder 1001. The buffer rod 1002 and the buffer cylinder 1001 form a group, and a total of four groups are provided. The advantage is that the buffer spring provides buffering, and the positioning groove 1201 and the rubber seat 1101 squeeze and engage, which can effectively reduce the impact force between the piston body 501 and the buffer valve 10, thereby reducing the impact and improving the service life of the piston body 501.

[0036] Specifically, the bottom side of the adjusting seat 12 has a positioning groove 1201, the buffer base 11 has a concave structure, and a rubber seat 1101 is fixedly installed on the inner side of the buffer base 11. The size and shape of the rubber seat 1101 match the positioning groove 1201. A limit spring 1102 is fixedly installed between the adjusting seat 12 and the buffer base 11. The advantage is that the limit spring 1102 can effectively reduce the impact when the piston body 501 contacts the buffer valve 10, while improving the stability of the adjusting seat 12 during movement. Furthermore, under the action of the rubber seat 1101, it is beneficial to further improve the buffering effect and resistance elasticity, thereby increasing the overall service life.

[0037] In operation, the piston body 501 moves inside the cylinder 2, squeezing the hydraulic oil inside the cylinder 2. As the pressure increases, the hydraulic oil is pushed towards the oil sump 13, which in turn pushes the first flow control valve 8 to slide. Subsequently, the hydraulic oil enters the overflow chamber 7 and pushes the squeezing plate 701 to move, thereby increasing the resistance for buffering. While the hydraulic oil is pushed towards the oil sump 13, the buffer valve 10 is pressed and moves, which in turn pushes the adjusting seat 12 to engage with the buffer base 11, driving the connecting rod 902 to pull the second flow control valve 9 to move. This facilitates the entry of hydraulic oil into the oil sump 13, improves the hydraulic oil flow efficiency, and thus improves the buffering rate. Moreover, during the movement of the first flow control valve 8 and the buffer valve 10, the action of the return spring 801 and the buffer spring helps to ensure that the piston body 501 moves smoothly. During the pushing process, resistance is generated, which first decomposes part of the pressure, thereby improving the buffering effect. Then, when the piston body 501 contacts the buffer valve 10, it is buffered by the buffer spring, and squeezed and locked by the positioning groove 1201 and the rubber seat 1101, which can effectively reduce the impact force between the piston body 501 and the buffer valve 10, thereby reducing the impact and improving the service life of the piston body 501. The combination of multiple sets of return springs 801, buffer springs and limit springs 1102 can improve the pressure resistance of the bottom valve body 3, thereby decomposing the pressure and improving the service life and years. Furthermore, under the action of the extrusion plate 701 and the extrusion spring, it is beneficial to improve the return effect when the hydraulic oil returns, thereby increasing the return rate of the piston body 501 and improving the buffering quality.

[0038] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oil pressure shock absorber bottom valve comprising a shock absorber outer tube (1), characterized by: The inner side of the shock absorber outer cylinder (1) is provided with an oil cylinder (2), the bottom side of the inner side of the shock absorber outer cylinder (1) is fixedly installed with a bottom valve body (3), the upper end of the oil cylinder (2) and the shock absorber outer cylinder (1) are provided with a guide (4), the guide (4) and the inner side of the shock absorber outer cylinder (1) are provided with a piston rod (5), the top end of the piston rod (5) is fixedly installed with a piston seat (6), the shock absorber outer cylinder (1) and the oil cylinder (2) are provided with an oil overflow cavity (7), the inner side of the bottom valve body (3) is provided with a first flow valve (8) and a second flow valve (9), the top side of the bottom valve body (3) is movably installed with a buffer valve (10), the inner side of the bottom valve body (3) is respectively provided with a buffer base (11) and an adjusting seat (12), and the top side of the bottom valve body (3) is provided with an oil groove (13).

2. An oil pressure shock absorber bottom valve according to claim 1, characterized in that: The outer side of the shock absorber outer cylinder (1) is fixedly installed with a guide cylinder (101), the outer side of the piston seat (6) is fixedly installed with a guide plate (601), the guide plate (601) is provided with four guide plates in total, and the bottom end of the piston rod (5) is fixedly installed with a piston body (501).

3. The oil pressure shock absorber bottom valve according to claim 1, characterized by: The inner side of the oil overflow cavity (7) is movably installed with an extrusion plate (701), the top side of the extrusion plate (701) is fixedly installed with a fixed column (702), the fixed column (702) and the oil cylinder (2) are fixedly installed with an extrusion spring, the fixed column (702) and the extrusion spring are a group, and four groups are provided in total, and the extrusion plate (701) is of a circular structure.

4. The oil pressure shock absorber bottom valve according to claim 1, characterized by: The side, away from the second flow valve (9), of the first flow valve (8) and the bottom valve body (3) are fixedly installed with a reset spring (801), one end, away from the first flow valve (8), of the second flow valve (9) is provided with a movable seat (901), the inner side of the movable seat (901) is movably installed with a connecting rod (902) through a bearing, one end, away from the second flow valve (9), of the connecting rod (902) is connected with the adjusting seat (12) and the movable seat (901), the first flow valve (8), the second flow valve (9) and the oil groove (13) are a group, and four groups are provided in total.

5. The oil hydraulic shock absorber bottom valve according to claim 1, characterized by: The buffer valve (10) and the bottom valve body (3) are respectively fixedly installed with a buffer rod (1002) and a buffer cylinder (1001), the buffer rod (1002) is movably installed on the inner side of the buffer cylinder (1001), the buffer rod (1002) and the buffer cylinder (1001) are fixedly installed with a buffer spring, the buffer rod (1002) and the buffer cylinder (1001) are a group, and four groups are provided in total.

6. The oil hydraulic shock absorber bottom valve according to claim 1, characterized by: The bottom side of the adjusting seat (12) is provided with a positioning groove (1201), the buffer base (11) is of a concave structure, the inner side of the buffer base (11) is fixedly installed with a rubber seat (1101), the size and shape of the rubber seat (1101) are matched with the positioning groove (1201), and the adjusting seat (12) and the buffer base (11) are fixedly installed with a limiting spring (1102).

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