Reinforced air spring and composite shock absorber

Abstract

The reinforced air spring and composite shock absorber comprises an air spring assembly and a shock absorber assembly, the air spring assembly comprises an upper cover body, a lower seat body and a bag skin made of an elastic material, and the two tail ends of the bag skin are fastened to the peripheral edges of the upper cover body and the lower seat body; a sealed elastic cavity is formed among the upper cover body, the lower seat body and the bag skin; and a spiral concave part is arranged on the peripheral edge of the bag skin. According to the reinforced air spring and the composite shock absorber, the design and application of the elastic element and the damping element are combined, the bearing capacity is improved, and the shock absorption effect is enhanced.

Description

Technical Field

[0001] The invention relates to the field of vehicle suspension systems, in particular to a reinforced air spring and a composite shock absorber. Background Art

[0002] In existing vehicle suspension systems, air springs are widely used because they can provide adjustable stiffness and good comfort. However, traditional air springs often face problems such as insufficient load-bearing capacity and poor durability under high loads or complex road conditions. At the same time, existing composite shock absorber designs are mostly independent components with complex structures, high maintenance costs, and poor performance under some extreme conditions.

[0003] In addition, with the development of the automobile industry, users' requirements for driving comfort, vehicle stability and safety are constantly increasing, which further promotes the development of air spring and shock absorber combination systems. However, the existing combination systems on the market still have technical bottlenecks such as insufficient design optimization, difficulty in balancing high strength and comfort, and inconvenient adjustment. Therefore, designing a reinforced air spring and composite shock absorber that has both high load-bearing capacity and excellent shock absorption effect has become an urgent problem to be solved in the current suspension system technology field. Summary of the invention

[0004] In order to overcome the above-mentioned problems, the present invention provides a reinforced air spring and a composite shock absorber, which combine the design and application of elastic elements and damping elements to improve the bearing capacity and enhance the shock absorption effect.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a reinforced air spring and a composite shock absorber, including an air spring assembly, the air spring assembly including an upper cover body, a lower seat body and a bladder skin made of elastic material, the two ends of the bladder skin are fastened to the periphery of the upper cover body and the lower seat body, and a sealed elastic cavity is formed between the upper cover body, the lower seat body and the bladder skin;

[0006] The circumference of the bag skin is provided with a spiral concave portion;

[0007] The air spring assembly also includes a coil spring, the pitch of which is adapted to the spiral recessed portion on the periphery of the bag skin, and the coil spring is embedded in the spiral recessed portion to form an integrated structure, and an elastic compression cavity is formed between each pitch.

[0008] Preferably, the upper cover body is provided with an air nozzle, which can inflate or deflate the elastic cavity and adjust the air pressure / elastic force in the elastic cavity.

[0009] Preferably, the coil spring and the bladder skin are vulcanized into an integral structure, and the coil spring is embedded in the bladder skin.

[0010] Preferably, the upper cover body and the lower seat body are provided with tapered connection ports around their peripheries.

[0011] Preferably, the air spring assembly further comprises a piston rod having a guiding function, wherein the upper end of the piston rod is fixedly connected to the upper cover body, and the lower end of the piston rod penetrates into the lower seat body, so that the upper cover body can maintain a coaxial center with the lower seat body when the upper cover body moves.

[0012] Preferably, the lower seat has an extended cavity that enables the bottom of the piston rod to move up and down.

[0013] The present invention also provides a composite shock absorber, comprising the above-mentioned reinforced air spring and a shock absorber assembly, wherein the shock absorber assembly comprises:

[0014] A liquid storage cylinder is installed at the bottom of the lower seat body;

[0015] The working cylinder is installed in the liquid storage cylinder, and the inner cavity of the liquid storage cylinder is divided into a working cavity located in the middle and a liquid storage cavity located at the periphery. The piston rod is inserted into the working cylinder, and a piston valve assembly is arranged at the bottom of the piston rod;

[0016] The compression valve assembly is arranged at the bottom of the working cylinder and connects the bottom of the working cylinder with the liquid storage cylinder;

[0017] The guide seat is arranged on the upper part of the working cylinder, connecting the upper part of the working cylinder and the liquid storage cylinder. The piston rod is inserted into the guide seat, moves up and down in the guide seat, and is sealed between the guide seat.

[0018] Preferably, the compression valve assembly is provided with an oil damping hole, and when the oil is compressed, it flows into the liquid storage chamber through the oil damping hole to play a damping role.

[0019] Preferably, a lower hanging ring is provided at the bottom of the shock absorber assembly, and an upper hanging ring is provided at the upper part of the air spring assembly.

[0020] Preferably, a limiting ring and a buffer rubber pad are provided in the middle of the portion where the piston rod extends into the working cylinder, which have buffering and limiting functions.

[0021] The beneficial effects of the present invention are: a reinforced air spring and composite shock absorber, by vulcanizing the coil spring and the air spring into an integrated structure, and combining the composite shock absorber, the design and application of the elastic element and the damping element in the vehicle shock absorption technology are integrated, and the balance between high load capacity, excellent shock absorption performance and compact structure is successfully achieved. The system is not only suitable for high loads and complex road conditions, but also can be dynamically adjusted according to real-time road conditions and user needs to improve the vehicle's handling, comfort and safety.

[0022] Through the adjustment of air spring pressure and composite shock absorber and modular design, the present invention has good scalability and maintenance convenience, which can not only significantly improve the load-bearing capacity and shock absorption performance of the suspension system, but also has high durability and environmental adaptability, and is particularly suitable for vehicle suspension systems under high loads and complex road conditions. The overall design enhances the durability, environmental adaptability and personalized functions of the system, providing an innovative solution for vehicle suspension systems, and has significant market application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a schematic diagram of the overall structure of the reinforced air spring of the present invention;

[0025] Figure 2 It is a simplified structural schematic diagram of the reinforced air spring described in the present invention;

[0026] Figure 3 is a schematic diagram of the overall structure of the composite shock absorber of the present invention;

[0027] Figure 4 It is a schematic diagram of the upper suspension ring installation structure of the composite shock absorber of the present invention;

[0028] Figure 5 It is a schematic diagram of the guide seat structure of the composite shock absorber of the present invention;

[0029] Figure 6 The figure is a schematic diagram of the structure of the piston valve assembly of the composite shock absorber described in the present invention.

[0030] Description of the drawings: 101, upper lifting ring, 102, connecting rod, 103, nut, 104, flat gasket, 105, O-ring, 106, upper cover body, 107, air nozzle, 108, bladder skin, 109, coil spring, 110, piston rod, 111, lower seat, 112, liquid storage cylinder, 113, retaining ring, 114, oil seal, 116, guide seat, 117, working cylinder, 118, buffer rubber pad, 119, limit ring, 120, piston valve assembly, 122, oil damping hole, 123, compression valve assembly, 124, liquid storage cylinder base, 125, lower lifting ring. DETAILED DESCRIPTION

[0031] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0032] Example 1

[0033] like Figure 1The reinforced air spring shown is an air spring assembly, which is composed of a coil spring 109 embedded in the air spring assembly. The high-strength coil spring 109 and the rubber bladder skin 108 are vulcanized into one piece to form a reinforced air spring, which combines the advantages of both and provides a more flexible and optimized suspension system.

[0034] The air spring assembly includes an upper cover 106, a lower seat 111, and a bladder skin 108 made of elastic material, the two ends of which are fastened to the periphery of the upper cover 106 and the lower seat 111, and a sealed elastic cavity is formed between the upper cover 106, the lower seat 111, and the bladder skin 108. The two ends of the bladder skin 108 can be fastened to the periphery of the upper cover 106 and the lower seat 111 by means of other fastening devices.

[0035] See also Figure 2 In this embodiment, a spiral recess is provided on the periphery of the bladder skin 108, and the pitch of the coil spring 109 is adapted to the spiral recess on the periphery of the bladder skin 108, and is embedded in the spiral recess to form an integrated structure, and an elastic compression cavity is formed between each pitch.

[0036] See also Figure 1 , 2 , the upper cover 106 is provided with an air nozzle 107, which can inflate or deflate the elastic cavity and adjust the air pressure / rigidity in the elastic cavity. When the vehicle is unloaded, a large load-bearing capacity is not required, and the elastic cavity can be filled with low-pressure air. At this time, the composite shock absorber has a soft stiffness, which can absorb small vibrations well and provide a more comfortable riding experience. When the vehicle is fully loaded or overloaded, a large load-bearing capacity is required, and the elastic cavity can be filled with high-pressure air. At this time, the composite shock absorber has a hard stiffness. Because the spiral spring 109 provides additional support, this way of sharing pressure enables the two springs to share the load more evenly, which not only improves the load-bearing capacity, but also reduces the wear of the system, thereby improving the durability of the entire suspension system. Through the collaborative work of the two, the vehicle can maintain better controllability and stability under complex driving conditions, such as sharp turns, bumpy roads or high-speed driving. This dual load-bearing mechanism enables the suspension system to cope with abnormal load conditions, ensuring that it remains safe and stable under extreme conditions (such as emergency braking, off-road, etc.).

[0037] By adjusting the air pressure of the air spring, dynamic adjustment of the spring stiffness and shock absorber damping characteristics is achieved, meeting the higher requirements of modern vehicles for comfort, handling and safety.

[0038] See also Figure 1 , 2 The coil spring 109 and the bladder skin 108 are vulcanized into an integral structure, and the coil spring 109 is embedded in the bladder skin 108 .

[0039] In this embodiment, the pitch of the spiral recessed portion around the coil spring 109 / bladder skin 108 gradually increases from top to bottom.

[0040] See also Figure 2 The upper cover body 106 and the lower seat body 111 are provided with a conical connection port around their peripheries. The rubber bag skin 108 is squeezed and sealed with the connection port.

[0041] In one embodiment, the air spring assembly also includes a piston rod 110, which has a guiding function. The upper end of the piston rod 110 is fixedly connected to the upper cover body 106, and the lower end penetrates into the lower seat body 111, so that the upper cover body 106 can maintain a coaxial center with the lower seat body 111 when moving.

[0042] In one embodiment, see Figure 1 The lower seat 111 has an extended cavity that enables the bottom of the piston rod 110 to move up and down.

[0043] The reinforced air spring in this embodiment combines the coil spring and the air spring by vulcanization and combines them with the composite shock absorber. This unique design achieves the following invention contents: first, the overall strength and load-bearing capacity of the air spring are improved, so that it can better cope with high loads and complex working conditions; second, the synergy of the coil spring and the air spring is utilized to optimize the shock absorption effect and effectively reduce the vibration transmission.

[0044] Example 2

[0045] like Figure 3 As shown, the composite shock absorber is composed of the reinforced air spring and the shock absorber assembly in Example 1. The reinforced air spring is combined with the composite shock absorber to further enhance the shock absorption performance and adapt to a wider range of application scenarios and more demanding use conditions; fourth, it ensures the stability and reliability of the entire system during operation and extends its service life; fifth, through innovative structural design and material combination, it provides a new solution for the field of shock absorption technology and promotes the development and progress of the industry. The content of this invention covers innovations and improvements in many aspects such as structural optimization, performance improvement, and application expansion of reinforced air springs and composite shock absorbers.

[0046] The shock absorber assembly includes a liquid storage cylinder 112 , a working cylinder 117 , a compression valve assembly 123 , and a guide seat 116 .

[0047] The liquid storage cylinder 112 is installed at the bottom of the lower seat body 111 and fixed to the bottom of the lower seat body 111.

[0048] In this embodiment, the working cylinder 117 is installed in the liquid storage cylinder 112, and the inner cavity of the liquid storage cylinder 112 is divided into a working chamber located in the middle and an annular liquid storage chamber located at the periphery. The piston rod 110 of the reinforced air spring is inserted into the working cylinder 117 to form a piston rod 110 structure, and a piston valve assembly 120 is arranged at the bottom of the piston rod 110.

[0049] See also Figure 6 The compression valve assembly 123 is arranged at the bottom of the working cylinder 117, connecting the bottom of the working cylinder 117 and the liquid storage cylinder 112; the compression valve assembly 123 is provided with an oil damping hole 122, and when the oil 122 is compressed, it flows into the liquid storage cavity through the oil damping hole 122 to play a damping role.

[0050] See also Figure 5 The guide seat 116 is arranged on the upper part of the working cylinder 117, connecting the upper part of the working cylinder 117 with the liquid storage cylinder 112. The piston rod 110 is inserted into the guide seat 116, moves up and down in the guide seat 116, and is sealed with the guide seat 116. Among them, there is an O-ring 105 between the guide seat 116 and the side wall of the liquid storage cylinder 112; a retaining ring 113 is arranged on the upper part of the guide seat 116; a concave cavity is formed on the upper part of the guide seat 116, and an oil seal 114 is installed in the concave cavity, and the oil seal 114 is tightly sleeved on the piston rod 110; to ensure the sliding and sealing performance of the piston rod 110.

[0051] See also Figure 5 The piston rod 110 has a limiting ring 119 and a buffer rubber pad 118, which play a buffering and limiting role to prevent the piston rod 110 from being over-stretched.

[0052] Among them, a lower hanging ring 125 is arranged at the bottom of the shock absorber assembly, and an upper hanging ring 101 is arranged at the upper part of the air spring assembly.

[0053] In this embodiment, see Figure 4 The upper part of the piston rod 110 passes through the upper cover 106, and the upper ring 101 is installed on the upper end of the piston rod 110 through the connecting rod 102. Specifically, an O-ring 105 is provided between the upper cover 106 and the piston rod 110 for sealing;

[0054] In the present invention, the upper lifting ring 101 is welded to the connecting rod 102 and combined with the piston rod 110 through a threaded connection.

[0055] In the present invention, the portion of the piston rod 110 that passes through the upper cover body 106 is a stud structure, which is limited and locked on the upper part of the upper cover body 106 by the nut 103 and the flat washer 104 respectively, and the upper part of the piston rod 110 has an annular step groove, and the flat washer 104 can be attached to the upper part of the upper cover body 106 and the annular step groove, so that the installation is more stable and reliable.

[0056] See also Figure 3 The piston valve assembly 120 is fixed to the piston rod 110 through the nut 103, and the piston rod 110 moves up and down to push the piston valve assembly 120 to compress the oil.

[0057] In this embodiment, see Figure 3 , 6 The bottom of the liquid storage cylinder 112 has a liquid storage cylinder base 124 that is concave downward, and the compression valve assembly 123 is arranged on the liquid storage cylinder base 124. The lower hanging ring 125 is welded on the liquid storage cylinder base 124.

[0058] The reinforced air spring and composite shock absorber of the present invention have the following multiple beneficial effects:

[0059] 1. Wide adjustment range: In the present invention, the air spring has adjustable stiffness and height, and the suspension characteristics of the vehicle can be adjusted according to the load and driving conditions. The coil spring provides fixed mechanical support and can provide basic elasticity when the air spring is not inflated or the air pressure is low. Combined with the shock absorber, the suspension system provides a wide adjustment range from soft to hard without sacrificing comfort, adapting to various driving needs.

[0060] 2. Excellent ride comfort: In the present invention, the air spring can absorb small vibrations well by adjusting the air pressure, providing a more comfortable ride experience; the spiral spring provides additional support under a larger impact force (such as a bumpy road), preventing the air spring from being over-compressed, thereby protecting the suspension system and the vehicle body. The shock absorber absorbs both small vibrations and larger impact forces, making the ride more stable and comfortable.

[0061] 3. Improve vehicle stability: In the present invention, the air spring can adjust the height and hardness according to the change of vehicle load, ensuring that the vehicle remains stable under different load conditions; the coil spring provides continuous support force, which helps to reduce the body roll when changing lanes or turning quickly, and improves the vehicle's handling and safety. And combined with the shock absorber, the vehicle can maintain good stability and handling under different loads and driving conditions.

[0062] 4. Increase system redundancy: In the present invention, the air spring may not be able to provide sufficient support force when the air spring fails (such as air leakage). The coil spring, as a redundant system, can still provide basic elastic support when the air spring fails, ensuring that the vehicle can continue to drive safely. This redundant design improves the reliability and safety of the entire suspension system, especially in long-distance driving or harsh environments.

[0063] 5. Superposition of load-bearing capacity: When the coil spring and air spring are working, their load-bearing capacity can be superimposed, which means that the combined system can handle a larger load without requiring a single spring to bear too much pressure. This is particularly suitable for use under heavy load conditions (such as transporting heavy objects or a full vehicle load).

[0064] 6. Improved durability and life: In the present invention, the coil spring provides a solid basic support, while the air spring reduces the impact load by adjustment. Combined with the shock absorber, the durability of the entire suspension system is significantly improved, the wear and tear in daily use is reduced, and the service life is extended.

[0065] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A reinforced air spring and composite shock absorber, characterized in that: The air spring assembly includes an upper cover, a lower seat, and a bladder skin made of elastic material, the two ends of the bladder skin are fastened to the periphery of the upper cover and the lower seat, and a sealed elastic cavity is formed between the upper cover, the lower seat, and the bladder skin; The circumference of the bag skin is provided with a spiral concave portion; The air spring assembly also includes a coil spring, the pitch of which is adapted to the spiral recessed portion on the periphery of the bag skin, and the coil spring is embedded in the spiral recessed portion to form an integrated structure, and an elastic compression cavity is formed between each pitch.

2. A composite sleeve-type air spring according to claim 1, characterized in that: The upper cover body is provided with an air nozzle, which can inflate or deflate the elastic cavity and adjust the air pressure / elastic force in the elastic cavity.

3. A composite sleeve-type air spring according to claim 2, characterized in that: The coil spring and the bladder skin are vulcanized into an integrated structure, and the coil spring is embedded in the bladder skin.

4. A composite sleeve-type air spring according to claim 3, characterized in that: The upper cover body and the lower seat body are provided with tapered connection ports at their peripheries.

5. A composite sleeve-type air spring according to claim 4, characterized in that: The air spring assembly also includes a piston rod, which has a guiding function. The upper end of the piston rod is fixedly connected to the upper cover body, and the lower end penetrates into the lower seat body, so that the upper cover body can maintain a coaxial center with the lower seat body when moving.

6. A composite sleeve-type air spring according to claim 5, characterized in that: The lower seat body has an extended cavity which enables the bottom of the piston rod to move up and down.

7. A composite shock absorber, characterized in that: The invention comprises a reinforced air spring and a shock absorber assembly as claimed in any one of claims 1 to 5; the shock absorber assembly comprises: A liquid storage cylinder is installed at the bottom of the lower seat body; The working cylinder is installed in the liquid storage cylinder, and the inner cavity of the liquid storage cylinder is divided into a working cavity located in the middle and a liquid storage cavity located at the periphery. The piston rod is inserted into the working cylinder, and a piston valve assembly is arranged at the bottom of the piston rod; The compression valve assembly is arranged at the bottom of the working cylinder and connects the bottom of the working cylinder with the liquid storage cylinder; The guide seat is arranged on the upper part of the working cylinder, connecting the upper part of the working cylinder and the liquid storage cylinder. The piston rod is inserted into the guide seat, moves up and down in the guide seat, and is sealed between the guide seat.

8. The composite sleeve air spring according to claim 7, characterized in that: The compression valve assembly is provided with an oil damping hole, and when the oil is compressed, it flows into the liquid storage cavity through the oil damping hole.

9. A composite sleeve-type air spring according to claim 8, characterized in that: A lower hanging ring is arranged at the bottom of the shock absorber assembly, and an upper hanging ring is arranged at the upper part of the air spring assembly.

10. The composite sleeve type air spring according to claim 8, characterized in that: A limiting ring and a buffer rubber pad are arranged in the middle of the part where the piston rod extends into the working cylinder, which have buffering and limiting functions.

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