Passive hydraulic cushioning block

Abstract

The utility model provides a passive hydraulic buffer block, and the buffer block is as a whole convex structure, including buffer block inner chamber and buffer block overflow board, the buffer block inside is equipped with the buffer block inner chamber of central distribution along the axial direction, buffer block inner chamber sets up in the buffer block inside upper position, the buffer block overflow board is transversely embedded in the buffer block inside, and the buffer block inner chamber in the middle is divided into independent buffer block upper chamber and buffer block lower chamber, and buffer block upper chamber, buffer block lower chamber realize two -way intercommunication through the damping oil way, the damping backflow oil way on the buffer block overflow board, adopt the synergic buffering mechanism of oil liquid damping + elastic deformation, through the damping oil way and the damping backflow oil way design on the buffer block overflow board, make the differentiating damping effect of oil liquid under different working conditions, when the extreme great impact, strong damping high -efficient energy absorption, when the conventional small -scale vibration, gentle filter vibration, impact energy dissipation rate is greatly improved than pure rubber / polyurethane buffer block, and the transmission of impact to the vehicle body is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive suspension system components, and in particular to a passive hydraulic buffer block. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] In automotive suspension systems, the proper limitation of suspension travel and the effective absorption of impact loads are core elements for ensuring the service life of shock absorbers and improving vehicle ride comfort and driving safety. As a key component of the suspension system, the hydraulic buffer block's core function is to limit excessive suspension compression through its structural characteristics, while simultaneously absorbing impact loads transmitted from the road surface, thus optimizing the driving experience.

[0004] Currently, most mainstream suspension damping components are made of pure rubber or polyurethane, relying solely on their own elastic deformation to achieve basic damping functionality. However, these damping blocks have significant technical drawbacks: On the one hand, relying solely on elastic deformation to absorb impacts results in insufficient dissipation of impact energy when facing large impact loads from bumpy roads and potholes. Some of the impact is directly transmitted to the vehicle body, seriously affecting driving comfort.

[0005] On the other hand, the damping characteristics of rubber or polyurethane are fixed, resulting in poor adaptability to working conditions. They cannot dynamically adjust the buffering effect according to the impact intensity, and they are not thorough in filtering vibrations with small vibrations and have weak buffering power with large impacts, making it difficult to meet the usage needs of different driving scenarios. Utility Model Content

[0006] To address the technical shortcomings of existing pure rubber / polyurethane buffer blocks, such as weak impact absorption capacity, poor adaptability to working conditions, and high vibration transmission rate, this utility model provides a passive hydraulic buffer block. By optimizing the integrated structure of the chamber and oil passage, that is, the integrated layout of the upper and lower chambers of the buffer block with damping oil passages, damping and return oil passages, it can achieve efficient absorption of impact loads and dynamic adaptation to different working conditions, while improving structural durability and sealing reliability, thereby significantly improving vehicle ride comfort and driving safety.

[0007] This utility model provides a passive hydraulic buffer block. The buffer block has a convex structure and includes a buffer block cavity and a buffer block flow plate. The buffer block cavity is centrally located along the axial direction and is located at an upper position inside the buffer block. The buffer block flow plate is horizontally embedded in the buffer block cavity, dividing the central buffer block cavity into an independent upper buffer block cavity and a lower buffer block cavity. The upper and lower buffer blocks are bidirectionally connected through damping oil passages and damping return oil passages on the buffer block flow plate.

[0008] Furthermore, an oil injection plate is fixedly mounted on the top outer side of the buffer block, and the oil injection plate and the top of the buffer block adopt an integrated interlocking structure.

[0009] Furthermore, the oil injection plate has a reserved oil injection channel for injecting a fixed amount of hydraulic oil into the upper cavity of the buffer block.

[0010] Furthermore, the inner diameter of the upper cavity and the lower cavity of the buffer block are the same along the axial direction.

[0011] Furthermore, the damping oil channels are symmetrically arranged on both sides of the buffer block oil plate, so that when the suspension is subjected to extreme large-amplitude impact, the hydraulic oil in the lower cavity of the buffer block flows synchronously to the upper cavity of the buffer block through the symmetrically arranged damping oil channels.

[0012] Furthermore, the damping return oil passage is located in the middle of the buffer block oil plate, and its inner diameter is larger than that of the damping oil passage. It is used to allow the hydraulic oil in the upper cavity of the buffer block to flow back to the lower cavity of the buffer block quickly when the suspension rebounds.

[0013] Furthermore, the upper cavity of the buffer block is located directly above the flow plate, and the upper part of this area is an assembly section with a small top diameter of a convex structure.

[0014] Furthermore, the lower cavity of the buffer block is located directly below the flow plate, and its exterior is wrapped with a large-diameter assembly section with a convex structure at the bottom.

[0015] Furthermore, the buffer block is made of a material with elastic deformation capability.

[0016] Furthermore, the buffer block, buffer block flow plate, and oil injection plate are bonded together at high temperature to form an integrated structure.

[0017] The present invention has the following beneficial effects from one or more of the above technical solutions: 1. This utility model adopts a synergistic buffering mechanism of oil damping and elastic deformation. Through the design of damping oil channels and damping return oil channels on the buffer block flow plate, the oil produces differentiated damping effects under different working conditions. It provides strong damping and efficient energy absorption during extreme large-amplitude impacts, and gently filters vibrations during normal small-amplitude vibrations. The impact energy dissipation rate is significantly improved compared with pure rubber / polyurethane buffer blocks, which greatly reduces the transmission of impact to the vehicle body and significantly improves driving comfort.

[0018] 2. The buffer block adopts a convex structure as a whole, and the connection between the transition section and the assembly section is provided with an arc chamfer, which effectively disperses the force and reduces stress concentration.

[0019] 3. Due to the different positions and inner diameters of the damping oil passage and the damping return oil passage, dynamic adaptation to different impact intensities is achieved, which solves the technical problem that the overall damping characteristics of existing pure rubber / polyurethane buffer blocks are fixed and cannot take into account different working conditions.

[0020] Advantages of the present invention in additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0022] Figure 1 This is a cross-sectional structural diagram of the hydraulic buffer block of this utility model; Figure 2 This is a schematic diagram of the overall external structure of the buffer block of this utility model; Figure 3 This is a detailed structural drawing of the buffer block flow plate of this utility model; In the diagram: 1. Buffer block; 2. Inner cavity of buffer block; 3. Flow plate of buffer block; 4. Oil injection plate; 5. Upper cavity of buffer block; 6. Lower cavity of buffer block; 7. Damping oil passage; 8. Damping return oil passage; 9. Convex structure; 10. Top assembly section; 11. Bottom large diameter assembly section; 12. Oil injection channel. Detailed Implementation

[0023] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0024] It should be noted that the terminology used herein is for the purpose of describing specific implementations only and is not intended to limit the exemplary implementations of this utility model. Unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0025] like Figure 1 — Figure 3As shown, this embodiment provides a passive hydraulic buffer block. The buffer block 1 has an overall convex structure 9, including a buffer block cavity 2 and a buffer block flow plate 3. The buffer block cavity 2 is centrally distributed along the axial direction. The buffer block flow plate 3 is laterally embedded in the interior of the buffer block cavity. In this embodiment, the buffer block flow plate 3 is laterally embedded at the central height inside the buffer block cavity, which precisely divides the central buffer block cavity into an independent upper buffer block cavity 5 and a lower buffer block cavity 6. That is, the axis of the buffer block flow plate 3 is completely coincident with the central axis of the buffer block cavity, and there is no design that is biased to the upper or lower. The inner diameter of the upper buffer block cavity and the lower buffer block cavity is the same along the axial direction.

[0026] The inner cavity of the buffer block is located in the upper part of the buffer block. The buffer block flow plate can be made of high-strength stainless steel. The contact surface between the flow plate and the inner cavity of the buffer block is coated with an anti-corrosion coating. The two sides of the buffer block flow plate are symmetrically provided with damping oil channels, and the middle is provided with a damping return oil channel. The inner diameter of the damping oil channel is larger than that of the damping oil channel, so as to ensure the differentiated flow of oil under different working conditions.

[0027] The upper cavity 5 and the lower cavity 6 of the buffer block are bidirectionally connected through the damping oil passage 7 and the damping return oil passage 8 on the buffer block flow plate 3.

[0028] like Figure 1 As shown, an oil injection plate 4 is fixedly mounted on the top outer side of the buffer block. The oil injection plate 4 and the top of the buffer block adopt an integrated fitting structure. The fitting surface is precision machined and adapted. The oil injection plate, the buffer block, and the buffer block flow plate are bonded together by high temperature vulcanization to form an integral structure. The plate body of the oil injection plate has a reserved oil injection channel 12 for injecting a certain amount of hydraulic oil into the upper cavity of the buffer block. A conical guide structure can be provided at the port of the oil injection channel according to actual needs, and a smooth coating is provided on the inner wall. After injecting a certain amount of hydraulic oil, the oil injection channel is sealed.

[0029] like Figure 3 As shown, in the buffer block structure of this embodiment, the upper cavity of the buffer block is located directly above the flow plate. The upper part of this area is a top assembly section 10 with a small diameter convex structure, which is used to adapt to the assembly size of the oil injection plate and ensure the stable integration and fitting of the oil injection plate and the buffer block. The upper cavity of the buffer block is generally in the shape of a short cylinder, which is mainly used to receive the oil flowing in from the lower cavity when the suspension is compressed. The inner space of the small diameter assembly section at the top can just accommodate the upper cavity. After the oil injection plate is installed, it can be directly connected to the upper cavity for oil injection.

[0030] The lower cavity of the buffer block is located directly below the flow plate. Its exterior is wrapped by a large-diameter assembly section 11 with a convex structure at the bottom. This area has a large diameter and is used to connect and assemble with other components of the vehicle suspension system (such as shock absorbers, suspension arms, etc.). The larger diameter provides more assembly space and connection stability. The inner diameter of the lower cavity of the buffer block is the same as that of the inner cavity of the central buffer block. The whole is in the shape of a short cylinder to store a sufficient amount of hydraulic oil. When the suspension is compressed, the volume decreases to generate stable pressure, which pushes the oil through the damping oil passage to the upper cavity. At the same time, it receives the return oil during rebound.

[0031] Because the buffer block's internal cavity is centrally located, and the upper and lower cavities of the buffer block are horizontally separated into equal-diameter chambers by the flow plate, the flow of oil between the upper and lower cavities is entirely axial, eliminating turbulence caused by radial offset. When the suspension compresses, the bottom of the buffer block is squeezed by the suspension components, and the volume of the lower cavity of the buffer block decreases smoothly along the axial direction. Due to the central distribution and equal-diameter chambers, the hydraulic oil in the cavity can be evenly pressurized and flows vertically upward into the upper cavity through the damping oil channels on both sides of the flow plate, avoiding uneven oil flow caused by chamber offset. When the suspension rebounds, the volume of the lower cavity increases axially, and the oil in the upper cavity flows vertically downward through the damping return oil channel in the middle of the flow plate. The central layout also ensures the shortest return path and the least flow resistance, improving the buffer response speed.

[0032] In addition, the buffer block can be made of a material with elastic deformation capability, such as polyurethane. This type of material has excellent elastic deformation capability and recovery rate, and can work together with oil damping to absorb impact energy. In order to facilitate installation, the bottom of the buffer block in this embodiment is provided with a mounting hole with internal thread, and the thread surface is provided with a galvanized anti-rust coating, which can be used to fix it to the suspension system connector.

[0033] In this embodiment, the passive hydraulic buffer block dynamically buffers the vehicle's movement based on different suspension actions. The specific working process is as follows: Suspension Compression Condition: When a vehicle travels on bumpy roads, potholes, or speed bumps at high speed, the road surface protrusion causes the suspension to compress, and the end of the buffer block moves under pressure, resulting in a decrease in the volume of the lower chamber of the buffer block and an increase in pressure. At this time, the hydraulic oil in the lower chamber of the buffer block flows synchronously to the upper chamber of the buffer block through damping oil channels symmetrically arranged on both sides of the buffer block's flow plate. When the oil flows in the narrow-diameter damping oil channels, it generates strong viscous damping with the channel walls. The strong damping force directly offsets most of the impact load, preventing the impact from being transmitted to the vehicle body. At the same time, the high-elasticity material used in the buffer block body undergoes elastic deformation, further absorbing impact energy and significantly reducing the transmission of impact to the vehicle body, thus preventing passengers from feeling strong bumps.

[0034] Suspension rebound condition: When the vehicle travels to a road surface depression or the suspension recovers after compression, the large-diameter damping return oil passage can significantly shorten the return time. The originally compressed part of the buffer block resets under the action of elasticity, the volume of the lower cavity of the buffer block increases and the pressure decreases. At this time, the hydraulic oil in the upper cavity of the buffer block quickly returns to the lower cavity of the buffer block through the damping return oil passage set in the middle of the buffer block flow plate. Because the inner diameter of the damping return oil passage is larger and the oil return speed is fast, it can quickly prepare for the next impact buffer.

[0035] Normal small vibration conditions: When the vehicle is driving on a flat road and only experiences minor vibrations, the suspension only generates small compression / rebound. At this time, the oil does not need to pass through the high-resistance damping oil passage, but only flows gently through the large-diameter damping return oil passage. The large inner diameter reduces the flow resistance, and the damping force is centered on vibration filtering. At the same time, the elastic deformation of the buffer block body assists in the buffering, preventing vibration from being transmitted to the vehicle body. This solves the pain point of the existing technology of stiff / incomplete vibration filtering in small vibrations, and improves driving comfort.

[0036] This embodiment employs a synergistic buffering mechanism combining oil damping, elastic deformation, and layered internal cavity of the buffer block. Through the design of damping oil channels and damping return oil channels on the buffer block's flow plate, the oil produces differentiated damping effects under different operating conditions. During extreme large-amplitude impacts, it provides strong damping and efficient energy absorption, while during normal small-amplitude vibrations, it gently filters vibrations. The impact energy dissipation rate is significantly improved compared to pure rubber / polyurethane buffer blocks, greatly reducing the transmission of impacts to the vehicle body and significantly improving ride comfort.

[0037] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A passive hydraulic buffer block, characterized in that, The buffer block has a convex structure and includes a buffer block cavity and a buffer block flow plate. The buffer block cavity is centrally located along the axial direction and is located at the upper part of the buffer block. The buffer block flow plate is horizontally embedded in the buffer block and divides the central buffer block cavity into an independent upper buffer block cavity and a lower buffer block cavity. The upper and lower buffer blocks are bidirectionally connected through damping oil channels and damping return oil channels on the buffer block flow plate.

2. A passive hydraulic buffer block as described in claim 1, characterized in that, An oil injection plate is fixedly mounted on the top outer side of the buffer block, and the oil injection plate and the top of the buffer block adopt an integrated interlocking structure.

3. A passive hydraulic buffer block as described in claim 2, characterized in that, The oil injection plate has a reserved oil injection channel for injecting a fixed amount of hydraulic oil into the upper cavity of the buffer block.

4. A passive hydraulic buffer block as described in claim 1, characterized in that, The inner diameter of the upper cavity and the lower cavity of the buffer block are the same along the axial direction.

5. A passive hydraulic buffer block as described in claim 1, characterized in that, The damping oil channels are symmetrically arranged on both sides of the buffer block oil plate. When the suspension is subjected to extreme large-amplitude impacts, the hydraulic oil in the lower cavity of the buffer block flows synchronously to the upper cavity of the buffer block through the symmetrically arranged damping oil channels.

6. A passive hydraulic buffer block as described in claim 1, characterized in that, The damping return oil passage is located in the middle of the buffer block oil plate, and its inner diameter is larger than that of the damping oil passage. It is used to allow the hydraulic oil in the upper cavity of the buffer block to flow back to the lower cavity of the buffer block quickly when the suspension rebounds.

7. A passive hydraulic buffer block as described in claim 1, characterized in that, The upper cavity of the buffer block is located directly above the flow plate, and the upper part of the upper cavity of the buffer block is an assembly section with a small top diameter of a convex structure.

8. A passive hydraulic buffer block as described in claim 1, characterized in that, The lower cavity of the buffer block is located directly below the flow plate, and its exterior is wrapped by a large-diameter assembly section with a convex structure at the bottom.

9. A passive hydraulic buffer block as described in claim 1, characterized in that, The buffer block is made of a material with elastic deformation capability.

10. A passive hydraulic buffer block as described in claim 1, characterized in that, The buffer block, buffer block flow plate, and oil injection plate are bonded together at high temperature to form an integrated structure.

Images