Vibration isolation block and air spring

Abstract

The vibration isolation block comprises a rubber sleeve and a metal framework, the rubber sleeve is fixedly connected to the outer side of the metal framework in a sleeved mode, chamfers are formed at the top and the bottom of the rubber sleeve in the Z direction, and the free ends, located at the two chamfers, of the rubber sleeve can move towards or away from the middle of the rubber sleeve. The chamfer is used for extending the distance between the top or the bottom of the rubber sleeve and the metal framework. According to the vibration isolation block, the chamfers are formed at the top and the bottom of the rubber sleeve, so that the distance between the top or the bottom of the rubber sleeve and the metal framework is prolonged, a space is reserved for movement of the free end of the rubber sleeve, namely extrusion of the rubber sleeve, the rubber sleeve is prevented from being pressed and sheared, and therefore the use durability of the vibration isolation block is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air spring vibration isolation blocks for vehicles, and more specifically to a vibration isolation block and an air spring. Background Art

[0002] With the continuous development of the automobile industry, users want to have larger vehicle space, higher driving comfort and handling stability. The passive vibration damping suspension structure used in the original McPherson suspension cannot meet the above consumer needs. Air suspension has become an inevitable market choice to replace the original passive shock absorber.

[0003] Air springs have the advantages of large load-bearing capacity, variable stiffness and small space occupation, and are increasingly used in mid-to-high-end and new energy vehicles.

[0004] As an important component connecting the air spring body and the shock absorber, the vibration isolation block has the functions of vibration isolation, position limiting, and some products also have sealing functions. New energy vehicles have put forward more stringent requirements on the vibration isolation block due to the increase in comfort requirements and the increase in the weight of the body itself. Under the premise of bearing large loads, it is also necessary to meet the end customers' demand for vibration isolation effects. With the increase in vibration isolation requirements, the dynamic-static ratio of the rubber material itself needs to be reduced, which will have a greater impact on the durability of the product and reduce the overall service life of the air spring.

[0005] The existing technology mostly adopts small planes and point-shaped hard limit methods to increase the durability life. Although the durability life is improved, the static load curve of the product is bound to be shortened, and the hard inflection point is advanced, resulting in partial loss of the vibration reduction function, affecting the comfort of the whole vehicle. The existing patent announcement number is CN214404461U, which discloses an air spring top rubber sealing structure, including: a piston rod, a bushing and a top seat assembly sleeved on the piston rod, the top seat assembly is provided with a seat hole for assembly with the piston rod, the bushing includes an inner metal frame, rubber and an outer metal frame bonded together, the inner metal frame is pressed against the shoulder of the piston rod, and the outer metal frame is limited in the seat hole of the top seat assembly by a hole elastic retaining ring, and the rubber is used to compensate for the displacement generated when the piston rod and the top seat assembly move relative to each other to achieve dynamic sealing. The utility model designs a bushing between the piston rod and the top seat assembly to reliably seal the high-pressure gas in the air spring, and compensates for the displacement generated when the piston rod and the top seat assembly move relative to each other through the rubber in the bushing, thereby ensuring the dynamic sealing effect of the air spring, making the pressures on the upper and lower surfaces of the top rubber assembly both normal pressure, solving the problem that the top rubber is affected by the fixed outward pre-pressure, and improving the isolation performance of the top rubber against high-frequency vibration.

[0006] But it still has the following problems:

[0007] (1) The colloid extrusion space on the vibration isolation block is limited, which easily causes the rubber to be compressed and sheared, resulting in a decrease in the service life of the vibration isolation block;

[0008] (2) It is not convenient to release vertical pressure, which affects the service life of the empty spring. Utility Model Content

[0009] The technical problem to be solved by the utility model is how to improve the service durability of the vibration isolation block.

[0010] The utility model solves the above technical problems through the following technical means: a vibration isolation block, which includes a rubber sleeve and a metal frame, a rubber sleeve is fixedly sleeved on the outer side of the metal frame, and the rubber sleeve is chamfered at the top and bottom of the Z direction. The free ends of the rubber sleeve located at the two chamfers can move toward or away from the middle of the rubber sleeve, and the chamfers are used to extend the distance between the top or bottom of the rubber sleeve and the metal frame.

[0011] By forming chamfers at the top and bottom of the rubber sleeve, the distance between the top or bottom of the rubber sleeve and the metal frame is extended, and space is reserved for the free end movement of the rubber sleeve, i.e., the extrusion of the rubber sleeve, thereby preventing the rubber sleeve from being compressed and sheared, thereby improving the durability of the vibration isolation block.

[0012] As a preferred technical solution, the end of the chamfer facing the metal frame is bonded and fixed to the metal frame and extends along the top or bottom of the metal frame toward the axial direction of the metal frame, and the end of the chamfer facing away from the metal frame extends along the Z direction away from the metal frame.

[0013] As a preferred technical solution, an annular groove is formed on the outer side of the rubber sleeve.

[0014] As a preferred technical solution, the chamfer includes a first chamfer and a second chamfer, the chamfer range of the first chamfer is R15-R30, and the chamfer range of the second chamfer is R5-R18.

[0015] As a preferred technical solution, the chamfer includes a first chamfer and a second chamfer, the chamfer of the first chamfer is R20, and the chamfer of the second chamfer is R7.

[0016] As a preferred technical solution, the bottom of the metal frame forms a bearing plane, and the bearing plane is a horizontal plane.

[0017] As a preferred technical solution, the metal frame is bonded and fixed to the rubber sleeve by an adhesive.

[0018] As a preferred technical solution, the metal skeleton is forged from carbon structural steel.

[0019] An air spring includes a vibration isolation block, a shock absorber and a locking nut. The metal frame is provided with a through hole for the shock absorber to pass through. The top of the metal frame is rotatably connected with a locking nut. One end of the shock absorber passes through the metal frame and is screwed and connected to the locking nut.

[0020] As a preferred technical solution, it also includes a sealing cover and an upper cover plate. The top of the upper cover plate is provided with a groove that is compatible with the vibration isolation block. The vibration isolation block is embedded in the groove. The top of the rubber sleeve is fixedly connected with a sealing cover. One end of the sealing cover connected to the rubber sleeve extends into the groove. A C-shaped retaining spring is embedded in the groove.

[0021] The advantages of the utility model are:

[0022] (1) In the utility model, chamfers are formed on the top and bottom of the rubber sleeve to extend the distance between the top or bottom of the rubber sleeve and the metal frame, thereby reserving space for the free end of the rubber sleeve to move, i.e., for the extrusion of the rubber sleeve, thereby preventing the rubber sleeve from being compressed and sheared, thereby improving the durability of the vibration isolation block.

[0023] (2) In the present invention, a bearing plane is formed at the bottom of the metal frame, and the bearing plane is set as a horizontal plane. Forging is adopted to ensure that the metal frame is less deformed when subjected to a large load, thereby increasing the bearing area.

[0024] (3) In the present invention, a groove is provided on the circumferential outer wall of the rubber sleeve to facilitate the release of vertical pressure, thereby increasing the durability of the rubber sleeve and thus increasing the service life of the vibration isolation block. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of the vibration isolation block provided in Example 1 of the utility model;

[0026] Figure 2 A schematic diagram of rubber chamfering provided in Example 1 of the utility model;

[0027] Figure 3 A schematic diagram of a static load curve provided in Example 1 of the utility model;

[0028] Figure 4 A schematic diagram of the force on the upper air chamber provided in Example 2 of the utility model;

[0029] Figure 5 A schematic diagram of the structure of a shock absorber provided in Example 2 of the utility model;

[0030] Figure 6 A schematic diagram of the sealing cover structure provided in Example 2 of the utility model;

[0031] Figure numbers: 1, locking nut; 2, vibration isolation block; 21, rubber sleeve; 22, adhesive; 23, metal frame; 231, bearing plane; 3, shock absorber; 4, sealing cover; 5, C-type retaining spring; R1, first chamfer; R2, second chamfer; R3, groove. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Example 1

[0034] See also Figure 1 A vibration isolation block includes a rubber sleeve 21, an adhesive 22, and a metal frame 23. The rubber sleeve 21 is sleeved and fixed on the outer side of the metal frame 23. The rubber sleeve 21 is formed with chamfers at the top and bottom of the rubber sleeve 21Z direction. The free ends of the rubber sleeve 21 located at the two chamfers can move toward or away from the middle of the rubber sleeve 21. The chamfers are used to extend the distance between the top or bottom of the rubber sleeve 21 and the metal frame 23. It should be noted that in this embodiment, the free end of the rubber sleeve 21 is to the top and bottom of the rubber sleeve 21 that is not fixed to the metal frame 23. Since the rubber has elasticity, it can move relative to the fixed ends of the rubber sleeve 21 and the metal frame 23. The metal frame 23 is bonded and fixed to the rubber sleeve 21 by the adhesive 22.

[0035] See also Figure 1 The end of the chamfer facing the metal frame 23 is bonded and fixed to the metal frame 23 and extends along the top or bottom of the metal frame 23 toward the axial direction of the metal frame 23, and the end of the chamfer facing away from the metal frame 23 extends along the Z direction away from the metal frame 23, thereby improving the connection strength between the rubber sleeve 21 and the metal frame 23.

[0036] See also Figure 2 The chamfers include a first chamfer R1 and a second chamfer R2. The chamfer range of the first chamfer R1 is R15-R30. In this embodiment, R20 is taken as an example, but it is not limited to this. The chamfer range of the second chamfer R2 is R5-R18. In this embodiment, R7 is taken as an example, but it is not limited to this. The circumferential outer wall of the rubber sleeve 21 is formed with an annular groove R3, which can facilitate the release of vertical pressure, improve the durability of the rubber sleeve 21, and thus improve the service life of the vibration isolation block 2. The groove R3 is generally located in the middle of the rubber sleeve 21.

[0037] See also Figure 1A bearing plane 231 is formed at the bottom of the metal frame 23, and the bearing plane 231 is a horizontal plane. At the same time, the metal frame 23 is forged by carbon structural steel to ensure that the metal frame 23 is less deformed when subjected to a large load, thereby increasing the bearing area.

[0038] Example 2

[0039] See also Figure 4 , Figure 5 , Figure 6 The difference between this embodiment and embodiment 1 is that an air spring including the vibration isolation block 2 in embodiment 1 is provided, including a locking nut 1, a vibration isolation block 2, a shock absorber 3, a sealing cover 4, a C-shaped retaining spring 5, and an upper cover plate. A through hole for the shock absorber 3 to pass through is opened on the metal skeleton 23, and the locking nut 1 is rotatably connected to the top of the metal skeleton 23. One end of the shock absorber 3 passes through the metal skeleton 23 and is screwed and connected to the locking nut 1, thereby realizing the connection between the shock absorber 3 and the vibration isolation block 2. A groove adapted to the vibration isolation block 2 is opened on the top of the upper cover plate, and the vibration isolation block 2 is embedded in the groove. A sealing cover 4 is fixedly connected to the top of the rubber sleeve 21, and one end of the sealing cover 4 connected to the rubber sleeve 21 extends into the groove. A C-shaped retaining spring 5 is embedded in the groove to fix the vibration isolation block 2 and limit its X / Y / Z directions.

[0040] It should be noted that the metal skeleton 23 is subjected to surface treatments such as shot peening, silicon ceramicization, primer spraying, and surface glue spraying, and then the rubber is vulcanized onto the metal skeleton 23 to form a rubber sleeve 21. The vibration isolation block 2 needs to be extruded and assembled, and the air chamber mating surface is plastic. In order to increase the life of the air chamber, a design without an outer tube is adopted. Figure 4 Where F1 is the supporting force of the airbag and the shock absorber 3, and F2 is the bearing pressure of the vehicle body.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vibration isolation block (2), comprising a rubber sleeve (21) and a metal frame (23), characterized in that: A rubber sleeve (21) is sleeved and fixed on the outside of the metal frame (23); the rubber sleeve (21) is formed with chamfers at the top and bottom in the Z direction; the free ends of the rubber sleeve (21) located at the two chamfers can move toward or away from the middle of the rubber sleeve (21); the chamfers are used to extend the distance between the top or bottom of the rubber sleeve (21) and the metal frame (23).

2. A vibration isolation block according to claim 1, characterized in that: The end of the chamfer facing the metal frame (23) is bonded and fixed to the metal frame (23) and extends along the top or bottom of the metal frame (23) towards the axial direction of the metal frame (23), and the end of the chamfer facing away from the metal frame (23) extends along the Z direction away from the metal frame (23).

3. A vibration isolation block according to claim 1, characterized in that: An annular groove (R3) is formed on the outer side of the rubber sleeve (21).

4. A vibration isolation block according to claim 1, characterized in that: The chamfers include a first chamfer (R1) and a second chamfer (R2), the chamfer range of the first chamfer (R1) is R15-R30, and the chamfer range of the second chamfer (R2) is R5-R18.

5. The vibration isolation block according to claim 1, characterized in that: The chamfer includes a first chamfer (R1) and a second chamfer (R2), the chamfer of the first chamfer (R1) is R20, and the chamfer of the second chamfer (R2) is R7.

6. The vibration isolation block according to claim 1, characterized in that: The bottom of the metal frame (23) forms a bearing plane (231), and the bearing plane (231) is a horizontal plane.

7. The vibration isolation block according to claim 1, characterized in that: The metal frame (23) is bonded and fixed to the rubber sleeve (21) by means of an adhesive (22).

8. The vibration isolation block according to claim 1, characterized in that: The metal frame (23) is forged from carbon structural steel.

9. An air spring comprising a vibration isolation block according to any one of claims 1 to 8, characterized in that: It also includes a shock absorber (3) and a locking nut (1); the metal frame (23) is provided with a through hole through which the shock absorber (3) can pass; the top of the metal frame (23) is rotatably connected with the locking nut (1); one end of the shock absorber (3) passing through the metal frame (23) is screwed and connected to the locking nut (1).

10. An air spring according to claim 9, characterized in that: It also comprises a sealing cover (4) and an upper cover plate, wherein a groove matching the vibration isolation block (2) is formed at the top of the upper cover plate, the vibration isolation block (2) is embedded in the groove, the sealing cover (4) is fixedly connected to the top of the rubber sleeve (21), one end of the sealing cover (4) connected to the rubber sleeve (21) extends into the groove, and a C-shaped retaining spring (5) is embedded in the groove.

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