Vibration isolation block and air spring

Abstract

The invention discloses a vibration isolation block and an air spring. The vibration isolation block comprises an upper vibration isolation block structure and a lower vibration isolation block structure which are arranged in a split mode. The upper vibration isolation block structure comprises an upper inner framework and an upper outer framework, an upper mounting hole is formed in the middle of the upper inner framework, and the upper inner framework is sleeved with the upper outer framework; the lower vibration isolation block structure comprises a lower inner framework, rubber and a lower outer framework, a lower mounting hole is formed in the middle of the lower inner framework, the rubber sleeves the outer side of the lower inner framework, and the lower outer framework sleeves the outer side of the rubber. The split type vibration isolation block has the advantages that the upper vibration isolation block structure and the lower vibration isolation block structure which are arranged in a split mode are assembled with the air inlet base, stress concentration is prevented, the borne radial rigidity and axial rigidity are decoupled and do not affect each other, the design is simple, the performance of the vibration isolation block is made to be in the best state, rubber is prevented from cracking after being durable, and the service life of the vibration isolation block is prolonged. The service life of the vibration isolation block is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of air springs, and in particular to a vibration isolation block and an air spring. Background Art

[0002] Air spring is a kind of suspension element in the automobile suspension system. It plays the role of supporting, buffering, adjusting and adapting to various purposes in the automobile suspension system. It is one of the important components of modern automobile suspension technology, and the vibration isolation block is one of the main parts of the air spring. During the movement of the whole vehicle with air spring, the vibration isolation block can support the shock absorber piston rod, and together with the shock absorber, suppress the vibration of the sprung mass and isolate the vibration and noise transmitted by the unsprung mass.

[0003] At present, the vibration isolation block is mainly composed of a frame and rubber. For example, the Chinese invention patent document with publication number CN117889176A discloses a vibration isolation block sealing structure, an air spring and a vibration isolation block assembly method. Similarly, the vibration isolation block in the patent is mainly composed of an inner core, rubber and a non-metallic outer frame to form an integrated structure. During the movement, the vibration isolation block will vibrate up and down, yaw and twist. The outer ring of the vibration isolation block and the upper air chamber are not tightly matched, which can easily lead to air leakage in the air spring. In addition, the stress concentration at the inner core will cause the rubber to crack after durability, affecting the service life of the vibration isolation block. Summary of the invention

[0004] The technical problem to be solved by the present invention is how to prevent stress concentration and decouple axial and radial stiffness control, thereby increasing the service life of the vibration isolation block.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A vibration isolation block comprises an upper vibration isolation block structure and a lower vibration isolation block structure which are arranged in a split manner;

[0007] The upper vibration isolation block structure includes an upper inner frame and an upper outer frame, the middle portion of the upper inner frame is provided with an upper mounting hole, and the upper outer frame is sleeved on the outer side of the upper inner frame;

[0008] The lower vibration isolation block structure comprises a lower inner frame, rubber and a lower outer frame, a lower mounting hole is arranged in the middle of the lower inner frame, the rubber sleeve is arranged on the outer side of the lower inner frame, and the lower outer frame sleeve is arranged on the outer side of the rubber.

[0009] The split upper and lower vibration isolation block structures are assembled with the air intake seat to prevent stress concentration and decouple the radial stiffness and axial stiffness so that they do not affect each other. The design is simple, which can bring the performance of the vibration isolation block to the best state, prevent the rubber from cracking after durability, and increase the service life of the vibration isolation block. The upper vibration isolation block has a simple structure and shape, consisting only of an upper inner frame and an upper outer frame, does not require vulcanization, has a low processing cost, and is easy to assemble.

[0010] Preferably, an annular groove is formed on the inner wall of the upper outer frame, and the upper inner frame is clamped on the annular groove.

[0011] Preferably, the annular groove is coated with grease.

[0012] Preferably, the central axes of the upper mounting hole and the lower mounting hole are the same central axis.

[0013] Preferably, the outer wall of the lower outer frame is also sleeved with an O-ring.

[0014] Preferably, the lower inner frame, rubber and lower outer frame are integrally formed structural parts.

[0015] Preferably, the rubber is connected to the lower inner frame and the lower outer frame respectively by vulcanization.

[0016] Preferably, the upper inner frame is made of steel, and the upper outer frame is made of foamed polyurethane.

[0017] Preferably, the lower inner frame and the lower outer frame are made of nylon-66.

[0018] Preferably, the present invention further discloses an air spring, comprising a vibration isolation block;

[0019] An air intake seat, wherein a mounting groove is provided in the middle of the top of the air intake seat, the upper vibration isolation block structure is arranged at the top of the mounting groove, and the lower vibration isolation block structure is arranged at the bottom of the mounting groove;

[0020] A shock absorber, one end of which passes through the air intake seat, the lower mounting hole and the upper mounting hole in sequence, and a nut is connected to the end of the shock absorber passing through the upper mounting hole;

[0021] The cover plate is fixed on the top of the air intake seat and abuts against the top of the upper outer frame.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The split upper and lower vibration isolation block structures are assembled with the air intake seat to prevent stress concentration and decouple the radial stiffness and axial stiffness so that they do not affect each other. The design is simple, which can bring the performance of the vibration isolation block to the best state, prevent the rubber from cracking after durability, and increase the service life of the vibration isolation block. The upper vibration isolation block has a simple structure and shape, consisting only of an upper inner frame and an upper outer frame, does not require vulcanization, has a low processing cost, and is easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of a vibration isolation block according to an embodiment of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of an air spring according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to facilitate those skilled in the art to understand the technical solution of the present invention, the technical solution of the present invention is further described in conjunction with the accompanying drawings of the specification.

[0027] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically limited.

[0029] See also Figure 1 This embodiment discloses a vibration isolation block, including an upper vibration isolation block structure 1 and a lower vibration isolation block structure 2 which are separately arranged.

[0030] The upper vibration isolation block structure 1 includes an upper inner frame 11 and an upper outer frame 12. An upper mounting hole 111 is provided in the middle of the upper inner frame 11. The upper outer frame 12 is sleeved on the outer side of the upper inner frame 11. Specifically, in this embodiment, an annular groove 121 is provided on the inner wall of the upper outer frame 12, and the upper inner frame 11 is clamped on the annular groove 121.

[0031] Furthermore, the annular groove 121 is coated with grease to facilitate the upper inner skeleton 11 to be clamped on the annular groove 121 and facilitate the installation of the upper inner skeleton 11.

[0032] Furthermore, the upper inner frame 11 is made of steel, and the upper outer frame 12 is made of foamed polyurethane.

[0033] The lower vibration isolation block structure 2 includes a lower inner frame 21 , a rubber 22 and a lower outer frame 23 . A lower mounting hole 211 is provided in the middle of the lower inner frame 21 . The rubber 22 is sleeved on the outer side of the lower inner frame 21 , and the lower outer frame 23 is sleeved on the outer side of the rubber 22 .

[0034] Furthermore, the lower inner frame 21, the rubber 22 and the lower outer frame 23 are an integrally formed structure. In this embodiment, the rubber 22 is connected to the lower inner frame 21 and the lower outer frame 23 by vulcanization to form an integrally formed structure.

[0035] Furthermore, an O-ring 24 is sleeved on the outer wall of the lower outer frame 23 .

[0036] Furthermore, the material of the lower inner frame 21 and the lower outer frame 23 is nylon-66.

[0037] Furthermore, the central axis of the upper mounting hole 111 and the lower mounting hole 211 is the same central axis, ensuring that the upper inner frame 11 and the lower inner frame 21 are sleeved on the shock absorber in the air spring.

[0038] See also Figure 2 The present invention also provides an air spring, comprising the above-mentioned vibration isolation block, air intake seat 3, shock absorber 4 and cover plate 5.

[0039] A mounting groove (not marked in the figure) is provided in the middle of the top of the air intake seat 3, the upper vibration isolation block structure 1 is arranged at the top of the mounting groove of the air intake seat 3, and the lower vibration isolation block structure 2 is arranged at the bottom of the mounting groove of the air intake seat 3;

[0040] The shock absorber 4, one end of which passes through the air intake seat 3, the lower mounting hole 211 and the upper mounting hole 111 in sequence, and the end of the shock absorber 4 passing through the upper mounting hole 111 is connected with a nut.

[0041] The cover plate 5 is fixed on the top of the air inlet seat 3 and abuts against the top of the upper outer frame 12 .

[0042] The installation process of this embodiment is as follows: first, the integrally formed lower vibration isolation block structure 2 is assembled and fixed with the air intake seat 3, so that the O-ring 24 sleeved on the outer wall of the lower outer frame 23 is in close contact with the inner wall at the bottom of the mounting groove of the air intake seat 3, and the lower inner frame 21 is sleeved on the shock absorber 4; at the same time, a layer of grease is applied in the annular groove 121 on the inner wall of the upper outer frame 12, and the upper inner frame 11 is clamped on the annular groove 121, so that the upper inner frame 11 and the upper outer frame 12 are assembled to form the upper vibration isolation block structure 1, and then the upper vibration isolation block structure 1 is installed into the top of the mounting groove of the air intake seat 3, and The upper inner frame 11 is set on the shock absorber 4, and the upper vibration isolation block structure 1 and the lower vibration isolation block structure 2 are fixed on the shock absorber 4 by nuts. By locking the nuts, the bottom surface of the upper inner frame 11 of the upper vibration isolation block structure 1 abuts against the top surface of the lower inner frame 21, and because the material of the upper outer frame 12 is foamed polyurethane, the upper outer frame 12 can fit tightly with the installation groove of the air intake seat 3 after the nuts are locked, meeting the sealing requirements of the upper end of the air spring, and finally, the cover plate 5 abuts against the top of the upper outer frame 12 and is fixed to the top of the air intake seat 3, and the vibration isolation block is installed on the shock absorber 4 and the air intake seat 3.

[0043] In summary, the present invention assembles the upper vibration isolation block structure 1 and the lower vibration isolation block structure 2 with the air intake seat 3 by means of a split arrangement, thereby preventing stress concentration and decoupling the radial stiffness and axial stiffness so that they do not affect each other. The design is simple, so that the performance of the vibration isolation block can be brought into an optimal state, and the rubber is prevented from cracking after durability, thereby increasing the service life of the vibration isolation block. In addition, the upper vibration isolation block structure 1 has a simple structural shape, consisting only of an upper inner skeleton 11 and an upper outer skeleton 12, and does not require vulcanization, has a low processing cost, and is easy to assemble. In addition, the upper vibration isolation block structure 1 is tightly matched with the inner side of the air intake seat 3 to meet the sealing requirements of the upper end of the air spring.

[0044] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

[0045] The embodiments described above only represent implementation methods of the invention. The protection scope of the present invention is not limited to the embodiments described above. For those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A vibration isolation block, characterized in that: It includes an upper vibration isolation block structure and a lower vibration isolation block structure which are arranged in a split manner; The upper vibration isolation block structure includes an upper inner frame and an upper outer frame, the middle portion of the upper inner frame is provided with an upper mounting hole, and the upper outer frame is sleeved on the outer side of the upper inner frame; The lower vibration isolation block structure comprises a lower inner frame, rubber and a lower outer frame, a lower mounting hole is arranged in the middle of the lower inner frame, the rubber sleeve is arranged on the outer side of the lower inner frame, and the lower outer frame sleeve is arranged on the outer side of the rubber.

2. A vibration isolation block according to claim 1, characterized in that: An annular groove is formed on the inner wall of the upper outer frame, and the upper inner frame is clamped on the annular groove.

3. A vibration isolation block according to claim 2, characterized in that: The annular groove is coated with lubricating grease.

4. The vibration isolation block according to claim 1, characterized in that: The central axes of the upper mounting hole and the lower mounting hole are the same central axis.

5. The vibration isolation block according to claim 1, characterized in that: The outer wall of the lower outer frame is also sleeved with an O-type sealing ring.

6. The vibration isolation block according to claim 1, characterized in that: The lower inner frame, rubber and lower outer frame are integrally formed structural parts.

7. The vibration isolation block according to claim 6, characterized in that: The rubber is connected to the lower inner frame and the lower outer frame respectively through vulcanization.

8. The vibration isolation block according to claim 1, characterized in that: The material of the upper inner frame is steel, and the material of the upper outer frame is foamed polyurethane.

9. The vibration isolation block according to claim 1, characterized in that: The material of the lower inner frame and the lower outer frame is nylon-66.

10. An air spring, characterized in that: The vibration isolation block according to any one of claims 1 to 9 further comprises: An air intake seat, wherein a mounting groove is provided in the middle of the top of the air intake seat, the upper vibration isolation block structure is arranged at the top of the mounting groove, and the lower vibration isolation block structure is arranged at the bottom of the mounting groove; A shock absorber, one end of which passes through the air intake seat, the lower mounting hole and the upper mounting hole in sequence, and a nut is connected to the end of the shock absorber passing through the upper mounting hole; The cover plate is fixed on the top of the air intake seat and abuts against the top of the upper outer frame.

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