A bidirectional damper with a buffer structure

Abstract

This utility model discloses a bidirectional buffer structure shock absorber, relating to the field of automotive shock absorber technology. It solves the problem in existing shock absorbers that cannot effectively suppress the impact force generated when a vehicle rapidly passes over uneven road surfaces. A piston rod is slidably mounted inside a working cylinder, which is fixedly mounted inside an oil reservoir. A bottom valve system is provided at the bottom of the oil reservoir, and an oil seal and guide seat are provided at the top. The free end of the guide seat extends into the working cylinder and has a groove. A tension limiting ring is provided on the piston rod; as the piston rod extends, it causes the tension limiting ring to slide into the groove. A first buffer spring seat and a second buffer spring seat are axially sleeved inside the working cylinder, and a buffer spring is fixedly connected between the first and second buffer spring seats. The bidirectional buffer structure shock absorber provided in this utility model embodiment, when installed on a vehicle, improves the overall comfort, safety, service life, and performance of the vehicle through its bidirectional buffer structure.

Description

Technical Field

[0001] This utility model belongs to the field of automotive shock absorber technology, specifically, it relates to a bidirectional buffer structure shock absorber. Background Technology

[0002] In a car's suspension system, the shock absorber is a core component that ensures the vehicle's driving performance. Its main function is to suppress the oscillations after the springs absorb the shock and absorb the impact energy from the road surface, thereby attenuating the vibration of the frame and body and improving ride comfort.

[0003] Existing shock absorbers generally rely on internal valve systems to achieve damping force. For example, CN212616069U discloses an automotive shock absorber assembly. This structure, which relies on internal valve systems for damping force, has significant shortcomings: the damping force of the entire shock absorber changes linearly with its speed. In actual driving, when a vehicle quickly passes over potholes, the tires rapidly drop to their limit position; conversely, when the vehicle rapidly impacts a raised surface, the tires rapidly rise to their limit position. In these situations, the impact force from uneven surfaces on the shock absorber is enormous, and the damping force generated by the valve system alone is insufficient to effectively suppress the instantaneous impact. This not only causes a strong, instantaneous impact on the vehicle body, significantly reducing passenger comfort and posing safety hazards, but also easily generates noise. Furthermore, frequent, strong impacts shorten the shock absorber's lifespan and affect overall vehicle performance. Utility Model Content

[0004] The present invention provides a bidirectional buffer structure shock absorber that dynamically suppresses instantaneous impacts through the synergistic action of hydraulic buffering, spring buffering and damping force, thereby improving the comfort, safety, service life and overall performance of the vehicle.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model discloses a bidirectional buffer structure vibration damper, including an oil reservoir, a working cylinder, and a piston rod. The piston rod is slidably disposed within the working cylinder, and a piston valve system is provided at the bottom end of the piston rod. The working cylinder is fixedly disposed within the oil reservoir, and a bottom valve system is provided at the bottom end of the oil reservoir. An oil seal and a guide seat are provided at the top end of the oil reservoir. The free end of the guide seat extends into the working cylinder, and a groove is provided at the free end of the guide seat. A tension limiting and fixing ring is provided on the piston rod, which is matched with the groove. The groove and the tension limiting and fixing ring are opposite to each other. When the piston rod extends, it causes the tension limiting and fixing ring to slide into the groove. A first buffer spring seat and a second buffer spring seat are axially sleeved inside the working cylinder, and the first buffer spring seat and the second buffer spring seat are disposed between the piston valve system and the bottom valve system. A buffer spring is fixedly connected between the first buffer spring seat and the second buffer spring seat.

[0007] Furthermore, a first annular groove is provided around the outer wall of the piston rod, and a second annular groove is provided around the inner wall of the tension limiting and fixing ring. A retaining ring is engaged in the first annular groove, with a portion of the retaining ring engaged in the first annular groove and the other portion of the retaining ring engaged in the second annular groove.

[0008] Furthermore, the buffer spring is a compression spring.

[0009] Furthermore, there is a gap between the outer wall of the first buffer spring seat and the inner wall of the working cylinder.

[0010] The beneficial effects of this utility model are:

[0011] This application provides a bidirectional buffer structure shock absorber, installed on a vehicle for vehicle shock absorption. A groove is provided at the free end of the guide seat, and a tension limiting and fixing ring is provided on the piston rod to cooperate with the groove. During piston rod extension, the tension limiting and fixing ring slides into the groove, forming a hydraulic buffer structure on the recovery side. A first buffer spring seat, a second buffer spring seat, and a buffer spring fixedly connected between the first and second buffer spring seats are axially sleeved inside the working cylinder, forming a buffer spring structure on the compression side. When the vehicle quickly passes over a pothole and the tire is at its downward jump limit, the piston rod is at its extension limit, and the tension limiting and fixing ring slides into the groove at the free end of the guide seat. A variable throttling gap is formed between the tension limiting and fixing ring and the bottom of the groove. The tension limiting and fixing ring compresses the damping oil in the groove, and the damping oil in the variable throttling gap generates nonlinear hydraulic resistance, suppressing the impact force when the tire jumps, absorbing impact energy, and playing a buffering role. The faster the speed, the greater the resistance. When a vehicle rapidly impacts a raised surface, and the tires are at their upper limit of bounce, the piston rod is at its contraction limit, compressing the buffer spring. The compressed spring absorbs the impact energy, preventing metal-to-metal contact and effectively suppressing the impact generated when the tire bounces, thus providing a cushioning effect. In extreme conditions where the vehicle rapidly traverses potholes or raised surfaces, and the tires are at their lower and upper bounce limits, the hydraulic buffer structure and buffer spring structure intervene promptly, working synergistically to significantly reduce the instantaneous impact force on the vehicle body, significantly improving ride comfort and reducing safety risks caused by excessive impact. It effectively mitigates the impact force under extreme conditions, reducing damage to internal shock absorber components, thereby extending the shock absorber's lifespan and reducing maintenance and replacement costs. The elimination of the traditional internal rubber buffer block reduces the number of components and simplifies the shock absorber's structural design, achieving cost optimization while ensuring performance improvement. In summary, the bidirectional buffer structure shock absorber of this application, employing a hydraulic buffer structure and a buffer spring structure, improves the overall comfort, safety, lifespan, and performance of the vehicle. The bidirectional buffer structure shock absorber of this application is suitable for various types of vehicles and different driving conditions, and has strong versatility and market application prospects. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a cross-sectional view of a bidirectional buffer structure vibration damper provided in an embodiment of this utility model;

[0014] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0015] Figure label:

[0016] Piston rod 1, oil seal 2, guide seat 3, working cylinder 4, tension limit fixing ring 5, piston valve system 6, first buffer spring seat 7, buffer spring 8, second buffer spring seat 9, bottom valve system 10, oil reservoir 11. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1 , Figure 2 As shown, this embodiment provides a bidirectional buffer structure vibration damper, including an oil reservoir 11, a working cylinder 4, and a piston rod 1. The piston rod 1 is slidably disposed within the working cylinder 4. A piston valve system 6 is provided at the bottom end of the piston rod 1, and the piston valve system 6 is sleeved within the working cylinder 4. The working cylinder 4 is fixedly disposed within the oil reservoir 11. A bottom valve system 10 is provided at the bottom end of the oil reservoir 11. An oil seal 2 and a guide seat 3 are provided at the top end of the oil reservoir 11. The free end of the guide seat 3 extends into the working cylinder 4. The piston rod 1 has a groove, and a tension limiting and fixing ring 5 is provided to cooperate with the groove. The groove and the tension limiting and fixing ring 5 are opposite to each other. When the piston rod 1 extends, it causes the tension limiting and fixing ring 5 to slide into the groove. The working cylinder 4 is axially fitted with opposing first buffer spring seats 7 and second buffer spring seats 9. The first buffer spring seats 7 and the second buffer spring seats 9 are located between the piston valve system 6 and the bottom valve system 10. A buffer spring 8 is fixedly connected between the first buffer spring seats 7 and the second buffer spring seats 9. The oil seal 2, guide seat 3, working cylinder 4, and bottom valve system 10 are flanged and pressed onto the oil reservoir 11 using existing technology. The oil reservoir 11 is filled with damping oil and nitrogen, and the working cylinder 4 is filled with damping oil. The tension limiting and fixing ring 5 slides into the groove, and the outer side wall of the tension limiting and fixing ring 5 is clearance-fitted with the inner side wall of the groove. The free end of the guide seat 3 is the other end of the guide seat 3 that is fixed to the oil reservoir 11. The stiffness of the buffer spring can be selected according to the load requirements of different vehicle models.

[0020] A bidirectional buffer structure shock absorber based on the above structure is installed on a vehicle for vehicle shock absorption. A groove is provided at the free end of the guide seat 3, and a tension limiting and fixing ring 5 is provided on the piston rod 1 to cooperate with the groove. During the extension of the piston rod 1, the tension limiting and fixing ring 5 slides into the groove, forming a hydraulic buffer structure on the recovery side. A first buffer spring seat 7, a second buffer spring seat 9, and a buffer spring 8 fixedly connected between the first buffer spring seat 7 and the second buffer spring seat 9 are axially sleeved inside the working cylinder 4, forming a buffer spring structure on the compression side. When the vehicle quickly passes over a pothole and the tire is at its downward jump limit, the piston rod 1 is at its extension limit, and the tension limiting and fixing ring 5 slides into the groove at the free end of the guide seat 3. A variable throttling gap is formed between the tension limiting and fixing ring 5 and the bottom of the groove. The tension limiting and fixing ring 5 compresses the damping oil in the groove, and the damping oil in the variable throttling gap generates nonlinear hydraulic resistance, suppressing the impact force when the tire jumps, absorbing impact energy, and playing a buffering role. The faster the speed, the greater the resistance. When a vehicle rapidly impacts a raised road surface, and the tires are at their upper limit of bounce, the piston rod 1 is at its contraction limit, compressing the buffer spring 8. The compressed and deformed buffer spring 8 absorbs the impact energy, preventing hard metal-to-metal contact and effectively suppressing the impact generated when the tire bounces, thus providing a cushioning effect. Under extreme conditions where the vehicle rapidly passes over potholes or raised surfaces, and the tires are at their lower and upper bounce limits, the hydraulic buffer structure and buffer spring structure can intervene promptly and work synergistically to significantly reduce the instantaneous impact force on the vehicle body, significantly improving ride comfort and reducing safety risks caused by excessive impact. It effectively mitigates the impact force under extreme conditions, reducing damage to internal components of the shock absorber, thereby extending the shock absorber's service life and reducing maintenance and replacement costs. The elimination of the internal rubber buffer block in traditional shock absorbers reduces the number of components and simplifies the shock absorber's structural design, achieving cost optimization while ensuring performance improvement. In summary, the bidirectional buffer structure shock absorber of this application adopts a bidirectional buffer structure of hydraulic buffer and buffer spring, improving the overall comfort, safety, service life, and overall performance of the vehicle. The bidirectional buffer structure shock absorber of this application is suitable for various types of vehicles and different driving conditions, and has strong versatility and market application prospects.

[0021] As one possible implementation method, such as Figure 1 , Figure 2 As shown, a first annular groove is provided around the outer wall of the piston rod 1, and a second annular groove is provided around the inner wall of the tension limiting and fixing ring 5. A retaining ring is engaged in the first annular groove, with a part of the retaining ring engaged in the first annular groove and the other part of the retaining ring engaged in the second annular groove.

[0022] The tension limiting and fixing ring 5 is fitted onto the piston rod 1. The second annular groove of the tension limiting and fixing ring 5 is engaged with the retaining ring to axially limit the tension limiting and fixing ring 5. The tension limiting and fixing ring 5 is fixedly installed on the piston rod 1, which facilitates the installation and disassembly of the tension limiting and fixing ring 5 and facilitates subsequent maintenance and replacement.

[0023] As one possible implementation method, such as Figure 1 As shown, the buffer spring 8 is a compression spring.

[0024] A compression spring contracts and deforms under axial pressure, storing spring deformation energy. When the pressure disappears, the stored spring deformation energy is released, and the compression spring extends and returns to its original position.

[0025] As one possible implementation method, such as Figure 1 As shown, there is a gap between the outer wall of the first buffer spring seat 7 and the inner wall of the working cylinder 4.

[0026] The first buffer spring seat 7 is fitted inside the working cylinder 4 and is clearance-fitted with the working cylinder 4, which facilitates the reciprocating movement of the first buffer spring seat 7 inside the working cylinder 4.

[0027] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A bidirectional buffer structure vibration damper, comprising an oil reservoir (11), a working cylinder (4), and a piston rod (1), wherein the piston rod (1) is slidably disposed within the working cylinder (4), a piston valve system (6) is disposed at the bottom end of the piston rod (1), the working cylinder (4) is fixedly disposed within the oil reservoir (11), a bottom valve system (10) is disposed at the bottom end of the oil reservoir (11), and an oil seal (2) and a guide seat (3) are disposed at the top end of the oil reservoir (11), characterized in that, The free end of the guide seat (3) extends into the working cylinder (4). The free end of the guide seat (3) is provided with a groove. The piston rod (1) is provided with a tension limiting and fixing ring (5) that cooperates with the groove. The groove and the tension limiting and fixing ring (5) are arranged opposite to each other. When the piston rod (1) extends, it drives the tension limiting and fixing ring (5) to slide into the groove. The working cylinder (4) is axially sleeved with a first buffer spring seat (7) and a second buffer spring seat (9). The first buffer spring seat (7) and the second buffer spring seat (9) are arranged between the piston valve system (6) and the bottom valve system (10). A buffer spring (8) is fixedly connected between the first buffer spring seat (7) and the second buffer spring seat (9).

2. The bidirectional buffer structure vibration damper according to claim 1, characterized in that, A first annular groove is provided around the outer wall of the piston rod (1), and a second annular groove is provided around the inner wall of the tension limiting and fixing ring (5). A retaining ring is engaged in the first annular groove, with a part of the retaining ring engaged in the first annular groove and the other part of the retaining ring engaged in the second annular groove.

3. The bidirectional buffer structure vibration damper according to claim 1, characterized in that, The buffer spring (8) is a compression spring.

4. A bidirectional buffer structure vibration damper according to claim 1, characterized in that, There is a gap between the outer wall of the first buffer spring seat (7) and the inner wall of the working cylinder (4).

Images