Air spring upper support structure and air spring

Abstract

The utility model discloses an air spring upper support structure and an air spring, the air spring upper support structure comprises an upper shell and a framework, the upper shell wraps the outer side wall of the framework in the radial direction, and the framework forms an upper cavity used for placing a lining; compared with the prior art that an upper shell is arranged on a framework in an injection molding mode, the inner side wall and the outer side wall of the framework are wrapped, so that the upper shell is connected with a buffer block on the lower portion, the upper shell bears impact force of the buffer block on the lower portion in the using process, and the upper shell is prone to cracking, air leakage and failure due to impact. According to the air spring upper support structure and the air spring, the upper shell is formed on the outer side wall of the framework and cannot bear impact of a buffer block on the lower portion, the service life of the air spring can be prolonged, and meanwhile the influence on air tightness detection can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile manufacturing, in particular to an air spring upper support structure and an air spring. Background Art

[0002] The air spring is a suspension element in the automobile suspension system. The air spring plays the role of supporting, buffering, adjusting and adapting to various uses in the automobile suspension system. It is one of the important components of modern automobile suspension technology. The upper support of the air spring, as an important component of the air spring, has an important impact on the overall performance of the air spring. In the prior art, the upper shell of the upper support of the air spring is generally injection molded on the skeleton. When in use, the upper shell will be impacted by the lower buffer block, resulting in rupture and leakage, which affects the service life of the air spring. At the same time, because the upper shell covers the inner and outer side walls of the skeleton, only skeleton-free bushings can be used, which makes the radial stiffness low and affects the results of the air tightness test.

[0003] Therefore, it is urgently necessary to develop an air spring upper support structure and an air spring. Compared with the existing technology, the air spring will not be impacted by the buffer block during use, which can avoid the occurrence of impact rupture of the upper shell, extend the service life of the air spring, and reduce the impact on air tightness detection. Summary of the invention

[0004] In view of this, the purpose of the utility model is to provide an air spring upper support structure and an air spring, which, compared with the prior art, will not be impacted by the buffer block during use, thereby avoiding the occurrence of impact rupture of the upper shell, extending the service life of the air spring, and reducing the impact on air tightness detection.

[0005] The utility model discloses an upper support structure of an air spring, comprising an upper shell and a frame, wherein the upper shell is radially wrapped around the outer side wall of the frame, and the frame forms an upper chamber for placing a bushing; the upper shell is formed on the outer side wall of the frame, so that when the upper shell is in use, it is not affected by the movement of the piston at the bottom, thus avoiding the occurrence of impact rupture and extending the service life of the air spring.

[0006] Furthermore, it also includes a lower shell, which forms a lower chamber. The lower shell is arranged at the lower part of the frame and the upper shell, and the lower shell can be assembled into one body with the frame and the upper shell.

[0007] Furthermore, the upper shell is provided with a connecting portion, which extends downward into the lower chamber and is attached to the circumferential side wall of the frame at a lower position; the connecting portion is attached to the axial side wall of the frame, so that the shell on the wall is affected by the movement of the piston.

[0008] Furthermore, the skeleton includes a first section, the outer wall of the first section is stepped, the bottom surface of the stepped shape is located in the lower chamber, and a gap is formed between the first section and the connecting part; by setting the skeleton in a stepped shape, the components inside the upper chamber can be limited in multiple directions.

[0009] Furthermore, it also includes a sealing assembly, which is arranged in the gap and includes a sealing ring I, a sealing ring retaining ring and a retaining ring arranged in sequence from top to bottom in the vertical direction, the sealing ring retaining ring and the sealing ring I are arranged on the inner side of the connecting part to form a seal between the skeleton and the side wall of the upper shell, and the retaining ring is arranged between the sealing ring retaining ring and the lower shell to form a seal between the skeleton and the lower chamber; the sealing assembly is arranged to seal the upper shell, the skeleton and the lower shell to avoid leakage and meet the use requirements of the air spring.

[0010] Furthermore, it also includes a sealing cover body, which is arranged above the upper chamber and is used to seal the upper chamber; the sealing cover body is arranged to seal the upper chamber, which can limit the components inside the upper chamber and meet the sealing requirements when the air spring is used.

[0011] Furthermore, it also includes a sealing ring II. The outer wall of the sealing cover body is formed with a sealing groove. The sealing ring II is arranged in the sealing groove and abuts against the inner wall of the upper chamber. The sealing ring II is arranged to further seal the upper chamber, which can meet the sealing requirements when the air spring is used.

[0012] Furthermore, it also includes a buffer block, which is arranged at the same rotation center as the bushing and is located in the lower chamber; the buffer block can play a role in buffering and vibration reduction.

[0013] Furthermore, a bushing frame is arranged outside the bushing; compared with the prior art, the bushing frame is arranged outside the bushing, which can prevent the bushing from displacement and affecting the air tightness detection at the sealing ring II.

[0014] The utility model discloses an air spring, which comprises the air spring upper support structure.

[0015] Beneficial effects of the utility model: compared with the prior art, the air spring upper support structure and the air spring of the utility model have an upper shell formed on the outer side wall of the skeleton, thereby avoiding the impact of the buffer block during use, reducing the probability of rupture of the upper shell, and extending the service life of the air spring. At the same time, the bushing can be selected with a skeleton bushing to reduce the impact on air tightness detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 It is a structural schematic diagram of an upper support of an air spring in the prior art;

[0018] Figure 2 It is a structural schematic diagram of the utility model;

[0019] The above drawings contain the following reference numerals:

[0020] 1. Upper shell; 101. Connecting part; 2. Lower shell; 3. Buffer block; 4. Retaining ring; 5. Sealing ring retaining ring; 6. Sealing ring I; 7. Sealing ring II; 8. Sealing cover; 9. Bushing; 10. Frame. DETAILED DESCRIPTION

[0021] Figure 1 It is a structural schematic diagram of the upper support of the air spring in the prior art. Figure 2 It is a schematic diagram of the structure of the utility model, such as Figure 1-2 As shown: an air spring upper support structure of this embodiment includes an upper shell 1 and a skeleton 10, wherein the upper shell 1 is radially wrapped around the outer side wall of the skeleton 10, and the skeleton 10 forms an upper chamber for placing a bushing 9; the skeleton 10 is made of metal material, which can ensure the structural strength of the upper support, support and protect the air spring, and keep the upper support in a stable shape and size, the upper shell 1 is injection molded on the outer side wall of the skeleton 10, the bushing 9 is an elastic member, which can be made of rubber, and plays a role in buffering and vibration reduction, the bushing 9 is suitable for connecting with one end of the piston rod, and the piston rod 9 passes through a The buffer block 3 is connected to the bushing 9. During the operation of the vehicle, the piston rod will move up and down, driving the bushing 9 connected to the piston rod to move. The bushing 9 will undergo elastic deformation in the upper chamber. In this structure, the bushing 9 can be selected to have a skeleton bushing 9, so as to avoid displacement of the bushing 9 and affect the result of the air tightness test. At the same time, compared with the prior art, it can avoid the upper shell 1 from being impacted and causing the upper shell 1 to rupture, thereby extending the service life of the air spring. At the same time, it can reduce the influence of the piston rod movement on the upper shell 1, thereby reducing the thickness of the bearing surface of the buffer block 3 and increasing the axial setting space of the air spring.

[0022] In the prior art, the upper shell of the air spring upper support is generally injection molded on the skeleton. When in use, the upper shell will be impacted by the lower buffer block, resulting in rupture and leakage, which affects the service life of the air spring. At the same time, since the upper shell covers the inner and outer walls of the skeleton, only skeleton-free bushings can be used, which makes the radial stiffness lower and affects the results of the air tightness test. Compared with the prior art, the upper shell of the air spring upper support structure and the air spring of the utility model are formed on the outer wall of the skeleton, thereby avoiding the impact of the buffer block when in use, reducing the probability of rupture of the upper shell, and extending the service life of the air spring. At the same time, the bushing is selected with a skeleton bushing to reduce the impact on the air tightness test.

[0023] In this embodiment, a lower shell 2 is also included, wherein the lower shell 2 forms a lower chamber, and the lower shell 2 is arranged at the lower part of the skeleton 10 and the upper shell 1, and the lower shell 2, the skeleton 10 and the upper shell 1 can be assembled into one body; the lower shell 2 is made of plastic, and the lower shell 2 forms a lower chamber, and the skeleton 10 is partially located in the lower chamber. The lower shell 2, the skeleton 10 and the upper shell 1 can be injection molded, or the lower shell 2 and the upper shell 1 are bonded to form a seal.

[0024] In this embodiment, the upper shell 1 is provided with a connecting portion 101, which extends downward into the lower chamber and is attached to the circumferential side wall of the lower position of the skeleton 10; the connecting portion 101 is attached to the circumferential side wall of the skeleton 10, thereby preventing the upper shell 1 from being affected by the movement of the piston.

[0025] In this embodiment, the skeleton 10 includes a first section, the outer wall of the first section is stepped, the bottom surface of the step is located in the lower chamber, and a gap is formed between the first section and the connecting portion 101; the first section of the skeleton 10 is set to be stepped, and the inner wall of the upper chamber is also stepped, which can improve the multi-directional limiting of the bushing 9 and components inside the upper chamber, and improve the stability of the internal structure of the air spring.

[0026] In this embodiment, a sealing assembly is also included, which is arranged in the gap and includes a sealing ring Ⅰ6, a sealing ring retaining ring 5 and a retaining ring 4 which are arranged in sequence from top to bottom in the vertical direction. The sealing ring retaining ring 4 and the sealing ring Ⅰ6 are arranged on the inner side of the connecting portion 101 to form a seal between the skeleton 10 and the side wall of the upper shell 1. The retaining ring 4 is arranged between the sealing ring retaining ring 5 and the lower shell 2 to form a seal between the skeleton 10 and the lower chamber. The sealing assembly is arranged in the gap, and the vertical direction is relative to the up and down direction of the vehicle, so that a seal can be formed between the skeleton 10, the upper shell 1 and the lower shell 2.

[0027] In this embodiment, a sealing cover body 8 is also included, and the sealing cover body 8 is arranged above the upper chamber to form a seal for the upper chamber; the sealing cover body 8 is arranged to seal the upper chamber, and when in use, the sleeve 9 can be pre-pressed to cause the sleeve 9 to deform and rebound after pre-pressing.

[0028] In this embodiment, a sealing ring II7 is also included. The outer wall of the sealing cover body 8 is formed with a sealing groove. The sealing ring II7 is arranged in the sealing groove and abuts against the inner wall of the upper chamber. A sealing groove is defined between the outer wall of the sealing cover body 8 and the inner wall of the upper chamber. The sealing ring II7 is arranged in the sealing groove, which can form a seal on the upper chamber, thereby ensuring the sealing performance of the air spring.

[0029] In this embodiment, a buffer block 3 is also included. The buffer block 3 and the bushing 9 are arranged at the same rotation center and are located in the lower chamber; the rotation center means that the buffer block 3 and the bushing 9 are designed and installed around the same rotation center, and the buffer block 3 is a rubber buffer block. The lower part of the rubber buffer block is curved to improve the buffering effect. At the same time, the piston rod passes through the buffer block 3, extends into the bushing 9, and is connected to the vibration-damping connecting piece (not shown in the figure) arranged in the upper chamber.

[0030] In this embodiment, a bushing frame is provided outside the bushing 9; in this structure, a bushing frame is provided outside the bushing 9, which can prevent the bushing 9 from affecting the air tightness detection at the sealing ring II 7 when it is deformed.

[0031] The utility model discloses an air spring, which comprises the air spring upper support structure.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An air spring upper support structure, characterized in that: The utility model comprises an upper shell and a frame. The upper shell is radially wrapped around the outer side wall of the frame. The frame forms an upper chamber for accommodating a bushing.

2. The air spring upper support structure according to claim 1, characterized in that: It also includes a lower shell, which is formed with a lower chamber. The lower shell is arranged at the lower part of the frame and the upper shell, and the lower shell can be assembled into one body with the frame and the upper shell.

3. The air spring upper support structure according to claim 2, characterized in that: The upper shell is provided with a connecting portion, which extends downward into the lower chamber and is attached to the circumferential side wall of the frame at a lower position.

4. The air spring upper support structure according to claim 3, characterized in that: The skeleton includes a first section, an outer wall of the first section is in a step shape, a bottom surface of the step shape is located in the lower chamber, and a gap is formed between the first section and the connecting portion.

5. The air spring upper support structure according to claim 4, characterized in that: It also includes a sealing assembly, which is arranged in the gap and includes a sealing ring I, a sealing ring retaining ring and a retaining ring arranged in sequence from top to bottom in the vertical direction. The sealing ring retaining ring and sealing ring I are arranged on the inner side of the connecting part to form a seal between the skeleton and the side wall of the upper shell. The retaining ring is arranged between the sealing ring retaining ring and the lower shell to form a seal between the skeleton and the lower chamber.

6. The air spring upper support structure according to claim 1, characterized in that: It also includes a sealing cover body, which is arranged above the upper chamber and is used to seal the upper chamber.

7. The air spring upper support structure according to claim 6, characterized in that: It also includes a sealing ring II. The outer wall of the sealing cover body is formed with a sealing groove. The sealing ring II is arranged in the sealing groove and abuts against the inner wall of the upper chamber.

8. The air spring upper support structure according to claim 2, characterized in that: It also includes a buffer block, which is arranged at the same rotation center as the bushing and is located in the lower chamber.

9. The air spring upper support structure according to claim 1, characterized in that: A bushing frame is arranged outside the bushing.

10. An air spring, characterized in that: The invention comprises the air spring upper support structure as described in any one of claims 1 to 9.

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