Air spring positioning anti-rotation structure and air spring

Abstract

The utility model discloses an air spring positioning anti-rotation structure and air spring, air spring positioning anti-rotation structure includes the air spring upper seat, piston seat, the bearing of being connected between the air spring upper seat and piston seat and makes the air spring upper seat and piston seat rotate and connect, the air cock of being installed on the piston seat, air spring positioning anti-rotation structure still includes the limiting hole of being located on the air spring upper seat, the inside end portion is matched with the air cock and can be inserted on the air cock with the outside end portion and the limiting hole cooperation and can be located in the limiting hole in the fixed pin, can make the air spring upper seat positioning, prevent the air spring upper seat from rotating to other angle when assembling, and when the fixed pin is taken down, other structure that cooperates with the fixed pin will not interfere with the suspension peripheral piece, and the plug-in is convenient and reliable, will not be abnormal and fall off, also will not cause air spring function to be damaged because of the leakage.

Description

Technical Field

[0001] This utility model belongs to the field of air spring accessories, and specifically relates to an air spring positioning and anti-rotation structure and an air spring. Background Technology

[0002] Currently, all vehicles with air suspension on the market are equipped with air springs, but the requirements for air springs vary between different vehicle models. In some models, during suspension movement, there is a significant torsion angle between the upper and lower seats of the air spring. To ensure that the air spring bladder's lifespan is not significantly shortened under torsional conditions, a load-bearing bearing is required between the upper seat (which mates with the vehicle's longitudinal beams) and the piston seat (where the bladder aligns). This bearing allows for free rotation at a certain angle before assembly into the vehicle, resulting in the upper and lower seats not perfectly aligning with the vehicle body and lower control arm during assembly. Currently, some air spring assembly processes use manual assistance, manually rotating the upper seat to align with the vehicle's longitudinal beams. However, for some fully automated air spring assembly processes, the upper seat locating pin may not align with the longitudinal beams. Therefore, a positioning and anti-rotation structure is needed to fix the position between the upper seat and the piston seat. Summary of the Invention

[0003] The purpose of this utility model is to provide an air spring positioning and anti-rotation structure, which can ensure accurate positioning between the air spring seat and the piston seat when the air spring is assembled into the vehicle, so as to meet the requirements of automated assembly of the vehicle.

[0004] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: an air spring positioning and anti-rotation structure, which includes an air spring upper seat, a piston seat, a bearing connecting the air spring upper seat and the piston seat to enable rotational connection between the air spring upper seat and the piston seat, and an air nozzle mounted on the piston seat. The air spring positioning and anti-rotation structure further includes a limiting hole provided on the air spring upper seat, and a fixing pin whose inner end matches the air nozzle and can be inserted into the air nozzle, and whose outer end matches the limiting hole and can be provided in the limiting hole. The fixing pin has at least a first position and a second position. When the fixing pin is in the first position, the inner end of the fixing pin is provided in the limiting hole and the outer end is inserted into the air nozzle. At this time, the rotational freedom of the air spring upper seat and the piston seat is restricted. When the fixing pin is in the second position, the fixing pin is disengaged from the limiting hole and the air nozzle. At this time, the air spring upper seat and the piston seat can rotate relative to each other.

[0005] In another embodiment, the limiting hole is provided on the outer peripheral surface of the upper seat of the air spring, which facilitates the installation and connection of the fixing pin.

[0006] In another embodiment, the limiting hole is a blind hole. The limiting hole can be through or non-through blind hole. When it is a blind hole, the limiting hole can prevent the outer end of the fixing pin from extending too deeply into the air nozzle.

[0007] In another embodiment, the air nozzle is cylindrical with a locking block on its outer circumference. The locking block has a limiting groove. When the fixing pin is in the first position, the middle part of the fixing pin is located inside the limiting groove. When the fixing pin is in the second position, the middle part of the fixing pin is located outside the limiting groove, which helps the fixing pin to more firmly limit the position of the upper seat of the air spring.

[0008] In another embodiment, a first sealing groove extending circumferentially and forming an annular shape is formed on the inner circumferential surface of the air nozzle, and a first sealing ring is provided in the first sealing groove. A plug extending from the outer end to the inner end is formed on the outer end of the fixing pin, and an annular groove is formed on the outer circumferential surface of the plug. When the fixing pin is in the first position, the first sealing ring is sleeved on the annular groove, which can prevent the force when the fixing pin plug is inserted into and pulled out of the air nozzle from being too large, and can prevent the fixing pin from accidentally falling off.

[0009] In another embodiment, the connector has a connecting hole that facilitates the injection molding of the fixing pin, which also reduces the molding difficulty of the annular groove.

[0010] In another embodiment, a second sealing groove adjacent to the first sealing groove is formed on the inner circumferential surface of the air nozzle, and a second sealing ring is provided in the second sealing groove. When the fixing pin is in the first position, the plug is inserted into the second sealing ring to ensure the air nozzle's sealing performance.

[0011] In another embodiment, the bearing includes an upper bearing seat fixed to the upper seat of the air spring, a lower bearing seat fixed to the piston seat, and a slip ring. A first sliding surface perpendicular to the piston seat axis is formed between the upper bearing seat and the lower bearing seat. A slide rail is provided between the first sliding surfaces. The slip ring is disposed in the slide rail and slides between the upper bearing seat and the lower bearing seat.

[0012] In another embodiment, the inner end and middle of the fixing pin are plate-shaped, which facilitates the alignment of the fixing pin with the air nozzle during installation.

[0013] This utility model also provides an air spring, which includes an anti-rotation structure, a main bladder, and a lower air spring seat. The anti-rotation structure is the aforementioned anti-rotation structure. The upper end of the main bladder is connected to the lower end of the piston seat, and the lower end of the main bladder is connected to the lower air spring seat.

[0014] The advantages of this utility model are: it can position the upper seat of the air spring, preventing it from rotating to other angles during assembly; when the fixing pin is removed, other structures that cooperate with the fixing pin will not interfere with the surrounding parts of the suspension; it is convenient and reliable to insert and remove, and will not fall off abnormally, nor will it damage the function of the air spring due to failure to remove; it has a simple structure, is quick and efficient to manufacture, and its low size requirements reduce manufacturing costs; it can be recycled and reused after cleaning. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3 for Figure 2 A partial view at point E in the middle;

[0018] Figure 4 This is a structural diagram of the fixing pin. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings:

[0020] The air spring includes an air spring positioning and anti-rotation structure A, a main spring cover B, and an air spring lower seat C. The upper end of the main spring cover B is connected to the lower end of the piston seat 2, and the lower end of the main spring cover B is connected to the air spring lower seat C.

[0021] The air spring positioning anti-rotation structure A includes an air spring upper seat 1, a piston seat 2, a bearing 3 connecting the air spring upper seat 1 and the piston seat 2 to allow them to rotate, an air nozzle 4 mounted on the piston seat 2, a limiting hole 6 on the air spring upper seat 1, and a fixing pin 5 whose inner end matches the air nozzle 4 and can be inserted into the air nozzle 4, and whose outer end matches the limiting hole 6 and can be located in the limiting hole 6. The fixing pin 5 has at least a first position and a second position. When the fixing pin 5 is in the first position, the inner end of the fixing pin 5 is located in the limiting hole 6 and the outer end is inserted into the air nozzle 4. At this time, the rotational freedom of the air spring upper seat 1 and the piston seat 2 is restricted. When the fixing pin 5 is in the second position, the fixing pin 5 is disengaged from the limiting hole 6 and the air nozzle 4. At this time, the air spring upper seat 1 and the piston seat 2 can rotate relative to each other.

[0022] The limiting hole 6 is located on the outer circumferential surface of the upper seat of the air spring 1 to facilitate the installation and connection of the fixing pin 5. The limiting hole 6 is a blind hole. The limiting hole 6 can be a through hole or a non-through blind hole. When it is a blind hole, the limiting hole 6 can prevent the outer end of the fixing pin 5 from extending too deeply into the air nozzle 4.

[0023] The air nozzle 4 is cylindrical, with a locking block 7 on its outer circumferential surface. A limiting groove 8 is formed on the locking block 7. When the fixing pin 5 is in the first position, the middle part of the fixing pin 5 is located within the limiting groove 8; when the fixing pin 5 is in the second position, the middle part of the fixing pin 5 is located outside the limiting groove 8, assisting the fixing pin 5 in more firmly limiting the position of the upper seat 1 of the air spring. A first sealing groove 9 extending circumferentially and forming an annular shape is formed on the inner circumferential surface of the air nozzle 4. A first sealing ring 10 is provided within the first sealing groove 9. A connector 11 extending from the outer end to the inner end is formed on the outer end of the fixing pin 5. An annular groove 12 is formed on the outer circumferential surface of the connector 11. When the fixing pin 5 is in the first position, the first sealing ring 10 is fitted onto the annular groove 12, ensuring that the force required to insert and remove the connector 11 of the fixing pin 5 from the air nozzle 4 is not excessive, and preventing the fixing pin 5 from accidentally falling off.

[0024] The connector 11 has a connecting hole 13 for easy injection molding of the fixing pin 5, which also reduces the molding difficulty of the annular groove 12.

[0025] A second sealing groove 14 adjacent to the first sealing groove 9 is provided on the inner circumferential surface of the air nozzle 4. A second sealing ring 15 is provided in the second sealing groove 14. When the fixing pin 5 is in the first position, the plug 11 passes through the second sealing ring 15 to ensure the airtightness of the air nozzle 4.

[0026] The bearing 3 includes an upper bearing seat 32 fixed to the upper seat 1 of the air spring, a lower bearing seat 31 fixed to the piston seat 2, and a slip ring 33. A first sliding surface perpendicular to the axis of the piston seat 2 is formed between the upper bearing seat 32 and the lower bearing seat 31. A slide 34 is provided between the first sliding surfaces. The slip ring 33 is located in the slide 34 and slides the upper bearing seat 32 and the lower bearing seat 31. The bearing 3 is a plane bearing 3 manufactured by Self-Lubricating Bearing 3 (Suzhou) Co., Ltd., with the model number SK 123.

[0027] The inner end and middle part of the fixing pin 5 are plate-shaped, which makes it easy to align the fixing pin 5 with the air nozzle 4 during installation.

[0028] During the manufacturing, transportation, and installation of the air spring, the rotational freedom between the upper seat 1 of the air spring and the piston seat 2 can be restricted by the fixing pin 5. After the air spring is installed on the automatic installation line, the fixing pin 5 is manually removed before connecting the air nozzle 4 to the air supply system. This prevents the fixing pin 5 from being missed, greatly improving the efficiency of production and installation and reducing the possibility of damage caused by the rotation of the upper seat 1 of the air spring during transportation.

[0029] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. An air spring positioning and anti-rotation structure, comprising an upper air spring seat, a piston seat, a bearing connecting the upper air spring seat and the piston seat to allow rotational connection between the upper air spring seat and the piston seat, and an air nozzle mounted on the piston seat, characterized in that: The air spring positioning and anti-rotation structure also includes a limiting hole on the upper seat of the air spring, and a fixing pin whose inner end matches the air nozzle and can be inserted into the air nozzle, and whose outer end matches the limiting hole and can be disposed in the limiting hole.

2. The air spring positioning and anti-rotation structure according to claim 1, characterized in that: The limiting hole is located on the outer circumferential surface of the upper seat of the air spring.

3. The air spring positioning and anti-rotation structure according to claim 1, characterized in that: The limiting hole is a blind hole.

4. The air spring positioning and anti-rotation structure according to claim 1, characterized in that: The air nozzle is cylindrical, with a locking block on its outer circumference. A limiting groove is formed on the locking block. When the fixing pin is in the first position, the middle part of the fixing pin is located inside the limiting groove; when the fixing pin is in the second position, the middle part of the fixing pin is located outside the limiting groove.

5. The air spring positioning and anti-rotation structure according to claim 1, characterized in that: The air nozzle has a first sealing groove extending circumferentially and forming an annular shape on its inner circumferential surface. A first sealing ring is provided in the first sealing groove. A plug is formed on the outer end of the fixing pin, extending from the outer end to the inner end. An annular groove is formed on the outer circumferential surface of the plug. When the fixing pin is in the first position, the first sealing ring is fitted onto the annular groove.

6. The air spring positioning and anti-rotation structure according to claim 5, characterized in that: The connector has a connecting hole for easy injection molding of the fixing pin.

7. The air spring positioning and anti-rotation structure according to claim 5, characterized in that: The inner circumferential surface of the air nozzle is provided with a second sealing groove adjacent to the first sealing groove, and a second sealing ring is provided in the second sealing groove.

8. The air spring positioning and anti-rotation structure according to claim 1, characterized in that: The bearing includes an upper bearing seat fixed to the upper seat of the air spring, a lower bearing seat fixed to the piston seat, and a slip ring. A first sliding surface perpendicular to the piston seat axis is formed between the upper bearing seat and the lower bearing seat. A slide rail is provided between the first sliding surface. The slip ring is disposed in the slide rail and slides between the upper bearing seat and the lower bearing seat.

9. The air spring positioning and anti-rotation structure according to claim 1, characterized in that: The inner end and middle part of the fixing pin are plate-shaped.

10. An air spring comprising an anti-rotation structure, a main spring cover, and a lower air spring seat, characterized in that: The anti-rotation structure is any one of the anti-rotation structures described in claims 1-9, the upper end of the main bladder is connected to the lower end of the piston seat, and the lower end of the main bladder is connected to the lower seat of the air spring.

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