Shock absorber and vehicle

Abstract

The invention relates to the related technical field of welding, and discloses a shock absorber and a vehicle. The shock absorber comprises a shock absorber barrel, a guider, a bottom valve assembly, a hollow piston rod, a piston valve assembly, a positioning rod working cylinder and a positioning rod, the positioning rod is connected with the bottom valve assembly, and a channel for oil liquid to flow is formed in the positioning rod; a lower one-way valve and an upper one-way valve are installed at the two ends of the channel respectively, the lower one-way valve is located at the position of the bottom valve assembly, a spiral groove is formed in the set position of the outer circle of the positioning rod, the positioning rod working cylinder and the positioning rod are coaxially arranged, the positioning rod working cylinder is arranged on the outer side of the positioning rod, and the positioning rod working cylinder can move along the axis of the positioning rod. The positioning rod working cylinder is connected with the hollow piston rod, the positioning rod plays a role in ensuring reliable and stable work of the shock absorber and also plays a role in adjusting damping force, the structure is simple, the cost is low, and the product performance that the service life of the shock absorber is prolonged is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field related to welding, and particularly to a shock absorber and a vehicle. Background Art

[0002] An automotive shock absorber is an important component for suppressing the oscillation when the spring rebounds after absorbing vibrations and the impact from the road surface. Its main function is to accelerate the vibration attenuation of the vehicle frame and body, thereby improving the ride comfort of the vehicle. With the development of new energy vehicles and the increasing requirements of consumers for vehicle performance, the performance and quality requirements for shock absorbers are also getting higher and higher. Currently, there are some problems with shock absorbers: when there is a large lateral force, the piston rings and oil seals on the piston will be eccentrically worn, resulting in a decrease in the concentricity when the shock absorber operates, and it is easy to cause abnormal wear of the oil seal lip and thus oil leakage. In addition, the current shock absorber also has a relatively complex structure for adjusting the damping effect, resulting in a high cost. In view of the above problems, this application is proposed. Summary of the Invention

[0003] The purpose of the present invention is to provide a shock absorber and a vehicle, which are used to overcome the problem that the current shock absorber is prone to eccentric wear when subjected to a large lateral force, improve the reliability of the shock absorber, and through a low-cost structural design, can effectively absorb and disperse vibration energy by adjusting the flow rate of hydraulic oil within a set stroke, providing a more stable driving experience.

[0004] The present invention is achieved through the following technical solutions.

[0005] A shock absorber and a vehicle of the present invention include a shock absorber cylinder, a guide, a bottom valve assembly, a hollow piston rod, a piston valve assembly, a positioning rod working cylinder, and a positioning rod. The positioning rod is connected to the bottom valve assembly, and the positioning rod has a channel for the flow of hydraulic fluid. A lower one-way valve and an upper one-way valve are respectively installed at both ends of the channel. The lower one-way valve is located at the position of the bottom valve assembly. A spiral groove is provided at a set position on the outer circumference of the positioning rod. The positioning rod working cylinder is coaxially arranged with the positioning rod and is provided outside the positioning rod. The positioning rod working cylinder can move along the axis of the positioning rod. The positioning rod working cylinder is connected to the hollow piston rod and the two move synchronously, and there is a gap between the positioning rod working cylinder and the hollow piston rod. A connection gap and a one-way plug are provided inside the positioning rod working cylinder between the positioning rod working cylinder and the hollow piston rod. In the working state, the hydraulic fluid enters the channel through the lower one-way valve and exits the channel through the upper one-way valve. Part of the hydraulic fluid enters the gap through the one-way plug and returns to the inside of the shock absorber cylinder, and part of the hydraulic fluid returns to the inside of the shock absorber cylinder through the spiral groove.

[0006] Further, the spiral groove is provided at the upper position of the positioning rod, so that when the shock absorber works to this stroke, the flow rate of the hydraulic fluid can be greatly reduced.

[0007] Furthermore, the positioning rod is provided with an oil through hole connected to the channel, and the oil through hole is arranged at the middle position of the positioning rod to facilitate the passage of oil and generate damping force.

[0008] Furthermore, the shock absorber cylinder includes an oil storage cylinder, an intermediate cylinder and a working cylinder which are arranged in sequence from the outside to the inside, the bottom valve assembly is arranged inside the oil storage cylinder, and an air storage bag is arranged between the intermediate cylinder and the working cylinder to achieve the effect of air storage and heat insulation.

[0009] Furthermore, the guide is provided with a dustproof oil seal, a step seal and a bushing which cooperate with the hollow piston rod, and the guide is provided with an inflation hole.

[0010] The bottom valve system of a traditional shock absorber has a complex structure and includes many valve plates. Nuts need to be tightened to lock the valve plates, and corresponding torque needs to be set and is complicated to detect. In the present solution, further, the bottom valve assembly includes a bottom cover, a limit valve plate and a bottom valve. The limit valve plate is provided with connected mounting holes and eccentric holes, and the positioning rod is provided with a limit slot. When the positioning rod is installed, it first passes through the eccentric hole and then moves the positioning rod into the mounting hole so that the wall of the mounting hole cooperates with the limit slot. There is no need for locking nuts and torque requirements, which is safe and reliable.

[0011] Furthermore, the spiral density distribution of the spiral groove is uniform or non-uniform, and shock absorbers with different damping effects can be designed by changing the spiral density distribution of the spiral groove.

[0012] Furthermore, a plurality of valve bodies are arranged in the spiral groove, and when the valve bodies are closed, corresponding positions of the spiral groove are blocked, so that the damping effect can be conveniently adjusted.

[0013] Furthermore, the valve body includes a hydraulic drive module and a stopper, the hydraulic drive module is connected to a pipeline, the pipeline is connected to a control module located outside the shock absorber cylinder, and the valve body is controlled by the control module.

[0014] A vehicle comprises the shock absorber mentioned above.

[0015] The beneficial effects of the present invention are as follows: by setting a positioning rod, the piston rod can reciprocate while ensuring concentricity, so that the concentricity of the shock absorber is better when it is actuated, and the occurrence of eccentric wear of the piston can be avoided under the support of a larger lateral force, thereby increasing the reliability of the product, reducing the probability of eccentric wear of the oil seal, and greatly reducing the occurrence of oil leakage caused by abnormal wear of sealing positions such as the oil seal lip due to eccentric wear.

[0016] By setting a spiral groove on the positioning rod, when the shock absorber works in this stroke, the oil flow can be greatly reduced, achieving the effect of adjusting the damping force, effectively absorbing and dispersing vibration energy, realizing precise control of the rebound stroke, reducing the impact peak value, thereby protecting the vehicle suspension system and body structure from damage, and providing a smoother driving experience. The oil also plays a role in lubricating the working cylinder of the positioning rod and the positioning rod.

[0017] The positioning rod not only ensures the reliable and stable operation of the shock absorber, but also plays the role of adjusting the damping force. Its structure is simple, the cost is low, and the product performance of the shock absorber's service life is improved.

[0018] In this solution, by setting several valve bodies in the spiral groove, personalized adjustment of the damping effect of the shock absorber at low cost is realized. Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] The present invention will be further described below in conjunction with the drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the overall structure of the shock absorber;

[0022] Figure 2 It is a cross-sectional view of the shock absorber;

[0023] Figure 3 It is a schematic diagram of the structures of the hollow piston rod, the guide, the bottom valve assembly, and the positioning rod;

[0024] Figure 4 It is a cross-sectional view of the hollow piston rod, the guide, the bottom valve assembly, and the positioning rod;

[0025] Figure 5 It is a schematic diagram of the structure of the positioning rod;

[0026] Figure 6 It is a cross-sectional view at the guide;

[0027] Figure 7 It is an exploded schematic diagram of the bottom valve assembly;

[0028] Figure 8 It is a schematic diagram of the structure of the positioning rod in Embodiment 5;

[0029] Figure 9It is a cross-sectional view at the position of the bottom valve assembly in Embodiment 5;

[0030] In the figure: oil storage cylinder 1, lifting ring 2, bracket 3, hollow piston rod 4, guide 6, bottom valve assembly 7, intermediate cylinder 8, working cylinder 9, positioning rod 10, positioning rod working cylinder 11, piston valve assembly 12, one-way plug 13, upper one-way valve 14, lower one-way valve 15, spiral groove 16, limit groove 17, air storage bag 18, oil passage hole 19, dust-proof oil seal 61, Step seal 62, bushing 64, inflation hole 66, bottom cover 71, limit valve plate 72, mounting hole 721, eccentric hole 722, bottom valve 73, oil guide pipe 74. Detailed implementation mode

[0031] Embodiment 1:

[0032] A shock absorber of the present invention, as Figures 1 - 7 , includes a shock absorber cylinder body, a guide 6, a bottom valve assembly 7, a hollow piston rod 4, a piston valve assembly 12, a positioning rod working cylinder 11 and a positioning rod 10.

[0033] In this embodiment, as Figure 2 , the shock absorber cylinder body includes an oil storage cylinder 1, an intermediate cylinder 8 and a working cylinder 9 which are arranged in sequence from outside to inside. The piston valve assembly 12 is located in the working cylinder 9 and is installed on the hollow piston rod 4. The outer end of the hollow piston rod 4 is connected to the lifting ring 2, and the bottom of the oil storage cylinder 1 is installed with the bracket 3.

[0034] As Figure 3 , Figure 6 , the guide 6 is provided with a dust-proof oil seal 61, a Step seal 62 and a bushing 64 that cooperate with the hollow piston rod 4. Two groups of Step seals 62 are provided. The structure of the Step seal can meet the requirements of large pressure. A dust-proof oil seal is provided at the upper end of the guide, which can improve the dust-proof effect of the shock absorber and ensure the service life of the shock absorber.

[0035] The positioning rod 10 is connected to the bottom valve assembly 7. The positioning rod 10 has a channel for the flow of oil liquid. The channel is open at the upper and lower ends of the positioning rod 10. A non-return lower one-way valve 15 that only allows oil to enter is installed on the lower side of the channel, and a non-return upper one-way valve 14 that only allows oil to exit is installed at the upper opening. The lower one-way valve 15 is located at the position of the bottom valve assembly 7. A spiral groove 16 is provided on the outer circle of the positioning rod 10. An oil passage hole 19 connected to the channel is provided on the positioning rod 10. The oil passage hole 19 is provided at the middle position of the positioning rod 10 to facilitate the passage of oil liquid and generate damping force.

[0036] In this embodiment, the spiral groove 16 is arranged at the upper position of the positioning rod 10, so that when the shock absorber works to this stroke, the oil flow can be greatly reduced. Therefore, the positioning rod 10 not only ensures the concentricity when the piston rod moves, reduces wear, but also adjusts the damping force through the setting of the spiral groove 16. The setting of the spiral groove 16 has the effect of adjusting the flow rate and pressure of the hydraulic oil. Its principle is similar to that of HRS, but the implementation process is different. It can effectively absorb and disperse vibration energy, achieve precise control of the rebound stroke, reduce the impact peak value, thereby protecting the vehicle suspension system and body structure from damage, and providing a smoother driving experience. The oil also plays a role in lubricating the working cylinder 11 of the positioning rod and the positioning rod 10.

[0037] Optionally, the spiral density distribution of the spiral groove 16 is set to be uniform or non-uniform. By changing the spiral density distribution of the spiral groove 16, shock absorbers with different damping effects can be designed. In other embodiments, the spiral groove 16 can also be arranged at other positions except the upper part, such as the middle part.

[0038] The working cylinder 11 of the positioning rod is coaxially arranged with the positioning rod 10 and is arranged outside the positioning rod 10. The working cylinder 11 of the positioning rod can move along the axis of the positioning rod 10. The working cylinder 11 of the positioning rod is connected to the hollow piston rod 4 through a one-way plug 13, and the two move synchronously. The internal channel of the hollow piston rod 4 is connected to the inside of the working cylinder 9. There is a gap between the inner wall of the internal channel of the working cylinder 11 of the positioning rod and the hollow piston rod 4. The one-way plug 13 connects the gap to the inside of the working cylinder 11 of the positioning rod, so that the oil inside the working cylinder 11 of the positioning rod can enter the gap through the one-way plug 13.

[0039] After adding the positioning rod 10, the piston rod can reciprocate while ensuring concentricity, and can avoid the occurrence of eccentric wear of the piston under the action of a large lateral force, increasing the reliability of the product. Moreover, when the shock absorber operates, the concentricity is good, reducing the probability of eccentric wear of the oil seal, and greatly reducing the occurrence of oil leakage caused by abnormal wear of the oil seal lip due to eccentric wear.

[0040] In the working state, the oil enters the channel through the bottom valve assembly 7 and the lower one-way valve 15, and is discharged from the channel through the upper one-way valve 14. Part of the oil enters the gap through the one-way plug 13 and returns to the inside of the shock absorber cylinder, and part of the oil returns to the inside of the shock absorber cylinder through the spiral groove 16.

[0041] After the hollow piston rod 4 and the working cylinder 11 of the positioning rod cooperate, the product can not only ensure the performance of the product and the safety of the driver and passengers under the set allowable stroke state, but also run more smoothly and smoothly through the settings of the spiral groove 16 and the oil through-hole 19 on the positioning rod 10 under the established stroke.

[0042] Due to the design of the hollow piston rod 4 cooperating with the positioning rod working cylinder 11, the machining requirements for the inner hole surface of the hollow piston rod 4 are significantly reduced, saving equipment costs. The positioning rod working cylinder 11 is a pipe drawing, which can be directly produced by a mold or directly purchased and can meet the fitting requirements. The process is more convenient. Therefore, the realization of the product is simpler, the complexity of the process requirements is reduced, and costs are saved.

[0043] Embodiment 2:

[0044] On the basis of Embodiment 1, in this embodiment, an air storage bag 18 is provided between the intermediate cylinder 8 and the working cylinder 9, which can play a heat insulation role. The air storage bag 18 is preferably made of an aluminum foil composite material, which can effectively separate the shock absorber oil and gas, avoiding the problem of air travel caused by the mixing of oil and gas during operation. The product can be used at various angles, ensuring the stability of the product. And the design of the aluminum foil can absorb part of the heat generated during actuation, extending the service life of the shock absorber and enhancing stability.

[0045] Embodiment 3:

[0046] On the basis of Embodiment 2, an inflation hole 66 is provided on the guide 6 for adjusting the gas pressure in the air storage bag 18, which facilitates the production process and improves production efficiency. In addition, by adjusting the gas pressure in the air storage bag 18, the volume of the air storage bag 18 can be adjusted, which plays an auxiliary role in adjusting the damping force parameters of the shock absorber.

[0047] An oil injection hole can be optionally provided to further facilitate production.

[0048] Embodiment 4:

[0049] On the basis of any of the above embodiments, in this embodiment, as Figure 7 , in this solution, the bottom valve assembly 7 is arranged inside the oil storage cylinder 1. Compared with the traditional shock absorber bottom valve, the bottom valve assembly 7 has no complex valve train structure. It is simple and convenient during assembly. The valve train structure of the traditional structure is complex and there are many valve plates. The current structure has fewer valve plates and good development effects. The traditional valve train also needs to tighten nuts to lock the valve plates, and corresponding torques need to be set and it is complex to detect. The current structure does not require a locking nut and torque requirements. As long as it passes through the limiting valve plate with an eccentric hole and then laterally pushes the limiting valve plate and then cooperates with the shape and position on the bottom cover at the bottom to achieve the effect of locking the valve plate, it is safe and reliable; and it has a self-checking error function. If the limiting valve plate is not assembled or not assembled in place during assembly, the product will be loose or unable to be normally assembled.

[0050] Specifically, the bottom valve assembly 7 includes a bottom cover 71, a limit valve plate 72, and a bottom valve 73. The limit valve plate 72 is provided with a plurality of valve holes, and also provided with a connected mounting hole 721 and an eccentric hole 722. The mounting hole 721 is arranged at the central position. The positioning rod 10 is provided with a limit groove 17. When the positioning rod 10 is installed, it first passes through the eccentric hole 722, and then the positioning rod 10 is moved into the mounting hole 721, so that the hole wall of the mounting hole 721 cooperates with the limit groove 17. Without the need for a lock nut and torque requirements, it is safe and reliable. The limit valve plate 72 is installed in the bottom cover 71, and then the bottom valve 73 is installed on the upper side of the limit valve plate 72. The bottom cover 71 is installed with a guide oil pipe 74 extending into the oil storage cylinder 1.

[0051] The oil storage cylinder 1 adopts an integrated design, which not only avoids waste of raw materials, but also enables better product consistency with precise mold positioning. Since it is integrally formed, the overall material of the outer cylinder is the same, and there is no need to press in the bottom cover or weld the bottom cover, saving manpower and equipment resources, and also ensuring the cleanliness of the product. Overall, the quality of the product and the production efficiency are improved.

[0052] Embodiment 5:

[0053] On the basis of any of the above embodiments, in this embodiment, as Figure 8 、 Figure 9 , in this embodiment, the spiral groove 16 is provided on the whole or most of the positioning rod 10. A plurality of valve bodies 20 are arranged in the spiral groove 16. When the valve body 20 is closed, it blocks the corresponding position of the spiral groove 16, adjusting the working stroke position where the oil flow rate is greatly reduced, so as to be able to conveniently adjust the damping effect and adapt to different driving requirements.

[0054] Specifically, the valve body 20 can adopt a plug valve, a baffle valve, a globe valve or other valve bodies that can block the spiral groove 16, and can be controlled electrically or hydraulically.

[0055] In this embodiment, the valve body 20 includes a hydraulic drive module and a stopper. The hydraulic drive module is embedded in the wall of the positioning rod 10. The hydraulic drive module drives the stopper to enter or exit the spiral groove 16. The hydraulic drive module is connected to the pipeline 21. The pipeline 21 extends in the internal channel of the positioning rod 10 and is connected to the control module 22 located outside the shock absorber cylinder. When multiple groups of valve bodies 20 are provided, corresponding control mechanisms for several valve bodies 20 are provided at the control module 22. The hydraulic drive module can be controlled to drive the stopper by injecting or discharging hydraulic oil at the control module 22, or a pump drive method can also be adopted.

[0056] The valve body 20 includes states such as fully open, fully closed, half open, and 1 / 4 open, realizing different adjustment effects of oil flow resistance, and further performing personalized adjustment on the damping effect of the shock absorber.

[0057] A vehicle, comprising a shock absorber in any of the above embodiments.

[0058] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A shock absorber, characterized in that: It includes a shock absorber cylinder body, a guide (6), a bottom valve assembly (7), a hollow piston rod (4), a piston valve assembly (12), a positioning rod working cylinder (11) and a positioning rod (10). The positioning rod (10) is connected to the bottom valve assembly (7). The positioning rod (10) has a channel for the flow of hydraulic fluid. One-way valves (15) and (14) are respectively installed at both ends of the channel. The lower one-way valve (15) is located at the position of the bottom valve assembly (7). A spiral groove (16) is provided on a part of the outer circumference of the positioning rod (10). The positioning rod working cylinder (11) is coaxially arranged with the positioning rod (10) and is arranged outside the positioning rod (10). The positioning rod working cylinder (11) can move along the axis of the positioning rod (10). The positioning rod working cylinder (11) is connected to the hollow piston rod (4), and the two move synchronously. There is a gap between the positioning rod working cylinder (11) and the hollow piston rod (4). A connection gap and a one-way plug (13) inside the positioning rod working cylinder (11) are provided between the positioning rod working cylinder (11) and the hollow piston rod (4). In the working state, the hydraulic fluid enters the channel through the lower one-way valve (15), discharges from the channel through the upper one-way valve (14), part of the hydraulic fluid enters the gap through the one-way plug (13) and returns to the inside of the shock absorber cylinder body, and part of the hydraulic fluid returns to the inside of the shock absorber cylinder body through the spiral groove (16).

2. The shock absorber according to claim 1, wherein: The spiral groove (16) is provided at the upper part of the positioning rod (10).

3. The shock absorber according to claim 2, characterized in that: An oil passage hole (19) connected to the channel is provided on the positioning rod (10).

4. The shock absorber according to claim 2, characterized in that: The shock absorber cylinder body includes an oil storage cylinder (1), an intermediate cylinder (8) and a working cylinder (9) arranged in sequence from outside to inside. The bottom valve assembly (7) is arranged inside the oil storage cylinder (1). An air storage bag (18) is provided between the intermediate cylinder (8) and the working cylinder (9).

5. The shock absorber according to claim 4, characterized in that: A dust-proof oil seal (61), a Struthers seal (62) and a bushing (64) that cooperate with the hollow piston rod (4) are provided on the guide (6). An inflation hole (66) is provided on the guide (6).

6. The shock absorber according to any one of claims 1-5, characterized in that: The bottom valve assembly (7) includes a bottom cover (71), a limit valve plate (72) and a bottom valve (73). A connected mounting hole (721) and an eccentric hole (722) are provided on the limit valve plate (72). A limit groove (17) is provided on the positioning rod (10). When the positioning rod (10) is installed, it first passes through the eccentric hole (722), and then the positioning rod (10) is moved into the mounting hole (721) so that the hole wall of the mounting hole (721) cooperates with the limit groove (17).

7. The shock absorber according to any one of claims 1-5, characterized in that: The spiral density distribution of the spiral groove (16) is set to be uniformly or non-uniformly distributed.

8. The shock absorber according to claim 1, wherein: A number of valve bodies (20) are provided in the spiral groove (16). When the valve bodies (20) are closed, the corresponding positions of the spiral groove (16) are blocked.

9. The shock absorber according to claim 8, characterized in that: The valve body (20) includes a hydraulic drive module and a stop block. The hydraulic drive module is connected to a pipeline (21), and the pipeline (21) is connected to a control module (22) located outside the shock absorber cylinder body.

10. A vehicle, characterized in that: It includes the shock absorber according to any one of claims 1-9.

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