Multi-bearing air spring and automobile suspension

Abstract

The air spring comprises an upper bearing seat and a lower bearing seat, the lower bearing seat is fixedly connected to the outer portion of the upper bearing seat, the upper bearing seat comprises an extension platform, the extension platform is located at the top of the upper bearing seat, and an automobile body installation seat is arranged between the extension platform and the lower bearing seat. A first bearing is arranged between the extension platform and the vehicle body installation seat, a second bearing is arranged between the lower bearing seat and the vehicle body installation seat, and the outer side and the inner side of the vehicle body installation seat are connected with the first bearing and the second bearing respectively.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of automobile suspension, specifically, the utility model relates to a multi-bearing air spring and automobile suspension. BACKGROUND

[0002] The Macpherson suspension system is a kind of independent suspension system widely used in automobile front wheels, and it becomes the mainstream choice of automobile design with the advantages of small space occupation and simple structure;The core components of the Macpherson suspension include shock absorber, spring and lower control arm, wherein the spring as the key element of support and buffer directly affects the comfort, handling and stability of the vehicle. Because the Macpherson suspension structure is compact, the air spring needs to bear large lateral force and torsional force in the Macpherson suspension, and the traditional air spring design is difficult to meet the performance requirements, the bladder skin is easy to fail due to torsion, which affects the normal work of the air spring.

[0003] The utility model patent with publication number CN 215334122U discloses an air spring on December 28, 2021, which comprises a piston, an air bag, an end cover, the two ends of the air bag are respectively sleeved on the outer wall of the piston and the end cover, and the three form a sealed chamber;It also includes: a bearing for bearing torsional force, a bearing seat for connecting the vehicle body;The bearing seat is connected with the piston;The bearing is arranged between the bearing seat and the piston, and abuts against the bearing seat and the piston. The air spring cannot solve the above-mentioned technical problems. UTILITY MODEL CONTENTS

[0004] The utility model aims at the shortage of prior art, and provides a multi-bearing air spring and automobile suspension which can avoid torsional failure of the bladder skin and long-term reliable operation of the bearing.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0006] The multi-bearing air spring comprises an upper bearing seat and a lower bearing seat, the lower bearing seat is fixedly connected outside the upper bearing seat, the upper bearing seat comprises an extension platform, the extension platform is located at the top of the upper bearing seat, a vehicle body mounting seat is arranged between the extension platform and the lower bearing seat, a first bearing is arranged between the extension platform and the vehicle body mounting seat, a second bearing is arranged between the lower bearing seat and the vehicle body mounting seat, and the outer side and the inner side of the vehicle body mounting seat are connected with the first bearing and the second bearing respectively.

[0007] The outer side of the upper bearing seat is provided with a retainer groove, the retainer groove is provided with a first retainer, and the first retainer abuts against the lower bearing seat.

[0008] The end of the extension platform is provided with a flange, the flange is located outside the end of the first bearing, the bottom of the vehicle body mounting seat is provided with a protrusion, and the protrusion is located outside the end of the second bearing.

[0009] It also includes a piston and a shock absorber, the shock absorber includes a shock absorber outer cylinder and a shock absorber piston rod, the top end of the shock absorber piston rod extends into the upper bearing seat and is connected with the top rubber block with a locking nut, the lower mounting seat is connected with the bottom of the piston with a dust cover, the upper bearing seat and the piston top are provided with a capsule skin, and the capsule skin is provided with a buckling ring at both ends.

[0010] The upper bearing seat is provided with a top rubber block and a sealing cover, the top of the top rubber block abuts against the sealing cover, a buffer block is sleeved on the shock absorber piston rod, and the bottom of the upper bearing seat is provided with a clamping block which is clamped with the bottom of the buffer block.

[0011] The upper bearing seat is also provided with a reinforcing plate, and the end of the reinforcing plate is in contact with the end of the sealing cover; the upper bearing seat is also provided with a second check ring, and the second check ring abuts against the end of the reinforcing plate.

[0012] The sealing cover and the inner side of the upper bearing seat are provided with a first sealing ring; the inner side of the upper bearing seat and the lower mounting seat is provided with a second sealing ring.

[0013] The third sealing ring, the gasket and the tray are sequentially arranged, the inner side of the piston abuts against the end of the tray, and the two sides of the gasket abut against the third sealing ring and the tray respectively; the inner part of the piston is provided with a pressure maintaining valve, the bottom end of the pressure maintaining valve extends out of the piston, and the fourth sealing ring is arranged between the pressure maintaining valve and the piston.

[0014] The automobile suspension includes the multi-bearing air spring.

[0015] The technical effect of the utility model is: the multi-bearing air spring of the utility model, two bearings are respectively designed on both sides of the vehicle body mounting seat, the torsion between the upper bearing seat, the vehicle body mounting seat and the lower bearing seat is borne, the torsion failure of the capsule skin is avoided, the service life of the air spring is improved, the anti-torsion design requirement of the air spring is met, the upper bearing seat with the extension platform and the lower bearing seat with the protrusion are designed, the bearing structure is reliably protected, the bearing operation is reliable for a long time, and multiple sealing elements are arranged, so that the air spring has reliable sealing performance. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present specification includes the following drawings, and the shown contents are respectively:

[0017] Figure 1 It is the sectional view schematic drawing of the multi-bearing air spring of the utility model;

[0018] Figure 2 It is the partial sectional view schematic drawing of the multi-bearing air spring of the utility model;

[0019] Figure 3 is a partial sectional view of the multi-bearing air spring of the utility model.

[0020] In the figure, marked: 1, the upper bearing seat; 2, the lower bearing seat; 3, the vehicle body mounting seat; 4, the first bearing; 5, the second bearing; 6, the extension platform; 7, the flanging; 8, the lower mounting seat; 9, the first check ring; 10, the protrusion; 11, the first sealing ring; 12, the second sealing ring; 13, the third sealing ring; 14, the fourth sealing ring; 15, the check ring groove; 16, the shock absorber outer tube; 17, the shock absorber piston rod; 18, the top rubber block; 19, the buffer block; 20, the dust cover; 21, the capsule skin; 22, the buckling ring; 23, the sealing cover; 24, the reinforcing plate; 25, the second check ring; 26, the gasket; 27, the tray; 28, the piston; 29, the pressure retaining valve; 30, the working cavity; 31, the locking nut; 32, the clamping block. DETAILED DESCRIPTION

[0021] The specific embodiments of the utility model are further described in detail below by comparing with the drawings and the description of the embodiments, the purpose is to help the technical personnel in the field to have more complete, accurate and in-depth understanding of the inventive concept and technical scheme of the utility model, and help its implementation.

[0022] As Figures 1 to 3 shown, the multi-bearing air spring includes the upper bearing seat 1 and the lower bearing seat 2, and the lower bearing seat 2 is fixedly connected outside the upper bearing seat 1, the upper bearing seat 1 includes the extension platform 6, the extension platform 6 is located at the top of the upper bearing seat 1, the vehicle body mounting seat 3 is arranged between the extension platform 6 and the lower bearing seat 2, the first bearing 4 is arranged between the extension platform 6 and the vehicle body mounting seat 3, the second bearing 5 is arranged between the lower bearing seat 2 and the vehicle body mounting seat 3, and the outer side and the inner side of the vehicle body mounting seat 3 are connected with the first bearing 4 and the second bearing 5 respectively.

[0023] The vehicle body mounting seat 3 is used for fixed connection with the vehicle. The bearing structure is additionally arranged at the vehicle body mounting seat 3 at the top of the air spring. The torsion generated between the air spring and the vehicle body mounting seat 3 during the working process of the air spring is borne by two bearings, so that the torsion failure of the air spring bag skin 21 is avoided. The upper bearing seat 1 is fixedly connected with the lower bearing seat 2 through the first retainer 9, that is, the first bearing 4 and the second bearing 5 cannot relatively deviate in the axial direction, so that the reliable bearing torsion performance is ensured. The inner side of the extension platform 6 provides a connection position for the first bearing 4, and the first bearing 4 is installed inside the upper bearing seat 1 after installation, and reliable protection is achieved. The first bearing 4 is located between the upper bearing seat 1 and the vehicle body mounting seat 3, and is used for bearing the axial force and the torsion force. The second bearing 5 is installed between the vehicle body mounting seat 3 and the lower bearing seat 2, and is used for bearing the axial force, the lateral force and the torsion force, so that the torsion failure of the bag skin 21 is avoided, and the service life of the air spring is improved. The end section of the vehicle body mounting seat 3 is a stepped structure, the inner and outer sides of which are reliably contacted and connected, and the rigid connection with the air spring assembly is avoided through the two bearings. The stability is higher, the relative rotation of the upper bearing seat 1, the lower bearing seat 2 and the vehicle body is allowed, and the anti-torsion performance of the air spring is improved.

[0024] As shown in Figure 2 , the outer side of the upper bearing seat 1 is provided with a retainer groove 15, and the retainer groove 15 is provided with a first retainer 9, and the first retainer 9 abuts against the lower bearing seat 2. The upper bearing seat 1 is provided with a retainer groove 15, and the lower bearing seat 2 is limited and fixed with the upper bearing seat 1 through the first retainer 9, so that the normal and reliable rotation function of the bearing is ensured. The installation height between the upper bearing seat 1 and the lower bearing seat 2 can be adjusted by adjusting the axial height of the retainer groove 15 or adjusting the size of the first retainer 9, so that the application range is wide.

[0025] As shown in Figure 2 , the end of the extension platform 6 is provided with a flange 7, the flange 7 is located outside the end of the first bearing 4, and the bottom of the vehicle body mounting seat 3 is provided with a protrusion 10, and the protrusion 10 is located outside the end of the second bearing 5. The flange 7 and the protrusion 10 have shielding and protection effects on the first bearing 5 and the second bearing 5, which can prevent dust and particles in the external environment from entering the inside of the bearing and affecting the normal operation of the bearing. The flange 7 and the protrusion 10 are annularly distributed and uniformly protect the internal bearings.

[0026] As shown in Figure 1As shown, the multi-bearing air spring further comprises a piston 28 and a shock absorber, the shock absorber comprising a shock absorber outer cylinder 16 and a shock absorber piston rod 17, the top end of the shock absorber piston rod 17 extending into the upper bearing seat 1 and being connected with a locking nut 31 with the top rubber block 18, a dust cover 20 being connected between the lower mounting seat 8 and the bottom of the piston 28, a bladder skin 21 being arranged between the lower mounting seat 8 and the top of the piston 28, and the bladder skin 21 being provided with a buckling ring 22 at both ends. The piston 28 is sleeved on the top of the shock absorber outer cylinder 16, which provides a bottom connection point for the bladder skin 21 and the dust cover 20, and the dust cover 20 is sleeved on the lower mounting seat 8 and the piston 28 at both ends respectively; the bladder skin 21 is sealed and connected with the piston 28 and the lower mounting seat 8 at both ends through the buckling ring 22 respectively, wherein the bladder skin 21 fixed at the end of the lower mounting seat 8 has a relatively large diameter, and the diameter change between the free state and the inflated state is not obvious, and the bladder skin 21 fixed at the end of the piston 28 has a smaller diameter and is folded along the piston 28.

[0027] As shown in the figure, Figure 2 The upper bearing seat 1 is provided with a top rubber block 18 and a sealing cover 23, the top of the top rubber block 18 abutting against the sealing cover 23, a buffer block 19 being sleeved on the shock absorber piston rod 17, and the bottom of the upper bearing seat 1 being provided with a clamping block 32 clamped with the bottom of the buffer block 19. The top rubber block 18 is fixedly connected with the shock absorber piston rod 17 through the locking nut 31, and the clamping block 32 is in the shape of an inverted hook, which can firmly connect the buffer block 19 with the upper bearing seat 1. When the vehicle runs on uneven road surface, the top rubber block 18 can buffer the impact between the vehicle body and the tire, reduce the tire noise generated by the friction between the tire and the ground, reduce the spread of noise, and improve the comfort of driving and riding. The buffer block 19 can limit the movement limit position of the shock absorber piston rod 17, avoid the impact between the shock absorber and the air chamber of the working chamber 30, prevent the damage of the shock absorber and the internal parts, absorb the compression impact force caused by the wheel jumping process, improve the driving stability, and enhance the driving comfort.

[0028] As shown in the figure, Figure 2 The upper bearing seat 1 is further provided with a reinforcing plate 24, the end of the reinforcing plate 24 being in contact with the end of the sealing cover 23; and the upper bearing seat 1 is further provided with a second retaining ring 25, the second retaining ring 25 abutting against the end of the reinforcing plate 24. The second retaining ring 25 fixes the sealing cover 23 and the reinforcing plate 24; the sealing cover 23 is sealed and connected with the upper bearing seat 1 through the first sealing ring 11, the reinforcing plate 24 is adapted with the middle part protrusion 10 of the sealing cover 23 through the hole in the middle part of the reinforcing plate 24, the end of the reinforcing plate 24 is in contact with the end of the sealing cover 23, and the second retaining ring 25 limits the reinforcing plate 24 to improve the installation stability and the sealing stability of the sealing cover 23.

[0029] As shown in the figure, Figure 2As shown, a first sealing ring 11 is provided between the sealing cover 23 and the inner side of the upper bearing seat 1; a second sealing ring 12 is provided between the upper bearing seat 1 and the inner side of the lower mounting seat 8. The upper bearing seat 1 and the lower mounting seat 8 are sealed together by the second sealing ring 12, and the lower mounting seat 8 abuts against the upper bearing seat 1 axially upward.

[0030] like Figure 3 As shown, a third sealing ring 13 and a gasket 26 are fitted onto the outer cylinder 16 of the shock absorber. A tray 27 is welded and fixed to the outside of the outer cylinder 16. The third sealing ring 13, gasket 26, and tray 27 are arranged sequentially. The inner side of the piston 28 abuts against the end of the tray 27, and the two sides of the gasket 26 abut against the third sealing ring 13 and the tray 27, respectively. The gasket 26 is fitted onto the outer cylinder 16 of the shock absorber and abuts against the shock absorber tray 27. The third sealing ring 13 is fitted onto the outer cylinder 16 of the shock absorber and abuts against the gasket 26. The piston 28 is fitted onto the outer cylinder 16 of the shock absorber and abuts against the tray 27 and the gasket 26, thus achieving a sealed connection between the piston 28 and the outer cylinder 16 of the shock absorber.

[0031] like Figure 3 As shown, a pressure-holding valve 29 is installed inside the piston 28, with its bottom end extending out of the piston 28. A fourth sealing ring 14 is provided between the pressure-holding valve 29 and the piston 28. A fourth sealing ring 14 is also provided on the outside of the pressure-holding valve 29, thus forming a sealed connection with the piston 28. The pressure-holding valve 29 can also be connected to the lower mounting base 8 as needed. In the event of a disconnection or leak in the air spring line, it ensures that a certain air pressure is maintained inside the air spring, preventing vehicle instability due to a sudden loss of air pressure.

[0032] Automotive suspension, including the aforementioned multi-bearing air springs.

[0033] The method for installing this multi-bearing air spring includes the following steps:

[0034] Step 1: Install the shock absorber and piston 28, and install the buffer block 19 on the shock absorber piston rod 17;

[0035] Step 2: Install the first bearing 4, the body mounting seat 3, the second bearing 5, the lower bearing seat 2, the first retaining ring 9, and the lower mounting seat 8 in sequence on the outside of the upper bearing seat 1;

[0036] Step 3: Connect the buffer block 19 to the upper bearing seat 1, insert the shock absorber piston rod 17 into the upper bearing seat 1 and fix it with the lock nut 31, and seal the middle part of the upper bearing seat 1 with the sealing cover 23 and the reinforcing plate 24.

[0037] Step 4: Use the clamping ring 22 to lock both ends of the bladder skin 21 and secure both ends of the dust cover 20.

[0038] Step 5: Connect to the vehicle body via the vehicle mounting bracket 3.

[0039] The specific installation method is as follows: the pressure maintaining valve 29 is fixed with the piston 28 in advance, the shock absorber and the piston 28 are sealed and connected by using the third sealing ring 13, the gasket 26 and the tray 27 in sequence, the upper bearing seat 1 bottom is connected and fixed with the buffer block 19; the first bearing 4, the vehicle body mounting seat 3, the second bearing 5 and the lower bearing seat 2 are installed from top to bottom on the outer side of the upper bearing seat 1 in sequence, then the above components are fixed by using the first blocking ring 9 to form a limit, the upper bearing seat 1 and the lower mounting seat 8 are sealed and connected by using a sealing ring, the upper bearing seat 1 is connected with the shock absorber piston rod 17, and the sealing cover 23 is installed to seal the upper bearing seat 1; the two buckle rings 22 are used to press the two end corrugated segments of the bladder skin 21 on the lower mounting seat 8 and the piston 28 respectively, the dust cover 20 is clamped and fixed on the lower mounting seat 8 and the piston 28 respectively, after the above components are installed, detection and inflation operation are carried out, and after it is ensured that the air spring has normal performance, the vehicle body mounting seat 3 can be connected with the vehicle body.

[0040] The above installation method adopts an axial installation mode, is simple and easy to operate, has low difficulty, is beneficial to improving assembly efficiency, makes the whole system more compact in the radial dimension, is suitable for complex or narrow installation areas, can fully utilize axial space, and avoids the use of radial installation due to the excessive radial dimension of individual components.

[0041] The air spring comprises a bearing assembly, a spring assembly and a shock absorber, the bearing assembly and the spring assembly are constrained in the axial direction by the shock absorber, and the bearing assembly, the spring assembly and the shock absorber form a working cavity 30.

[0042] The multi-bearing air spring is provided with two bearings on both sides of the vehicle body mounting seat 3, can bear the torsion between the upper bearing seat 1, the vehicle body mounting seat 3 and the lower bearing seat 2, avoids torsion failure of the bladder skin 21, improves the service life of the air spring, meets the anti-torsion design requirement of the air spring, and is provided with the upper bearing seat 1 with an extension platform 6 and the lower bearing seat 2 with a protrusion 10, which reliably protects the bearing structure and makes the bearing run reliably for a long time, and is provided with multiple sealing elements, so that the air spring has reliable sealing performance.

[0043] The utility model is described exemplarily above in combination with the drawings. Apparently, the utility model is not limited to the above-mentioned mode. As long as various non-essential improvements are made by using the method concept and technical scheme of the utility model, or the above-mentioned concept and technical scheme of the utility model are directly applied to other occasions without improvement, all fall within the protection scope of the utility model.

Claims

1. A multi-bearing air spring, characterized by: The application relates to a bearing seat for a vehicle body, which comprises an upper bearing seat (1) and a lower bearing seat (2), wherein the lower bearing seat (2) is fixedly connected to the outside of the upper bearing seat (1), the upper bearing seat (1) comprises an extension platform (6) arranged on the top of the upper bearing seat (1), a vehicle body mounting seat (3) is arranged between the extension platform (6) and the lower bearing seat (2), a first bearing (4) is arranged between the extension platform (6) and the vehicle body mounting seat (3), a second bearing (5) is arranged between the lower bearing seat (2) and the vehicle body mounting seat (3), and the outer side and the inner side of the vehicle body mounting seat (3) are connected with the first bearing (4) and the second bearing (5) respectively.

2. The multi-bearing air spring of claim 1, wherein: The outer side of the upper bearing seat (1) is provided with a check ring groove (15), the check ring groove (15) is provided with a first check ring (9), and the first check ring (9) is in abutment with the lower bearing seat (2).

3. The multi-bearing air spring of claim 2, wherein: The end of the extension platform (6) is provided with a turn-up (7), the turn-up (7) is arranged on the outer side of the end of the first bearing (4), the bottom of the vehicle body mounting seat (3) is provided with a protrusion (10), and the protrusion (10) is arranged on the outer side of the end of the second bearing (5).

4. The multi-bearing air spring of claim 3, wherein: The application further comprises a piston (28) and a shock absorber, the shock absorber comprises a shock absorber outer cylinder (16) and a shock absorber piston rod (17), the top end of the shock absorber piston rod (17) extends into the upper bearing seat (1) and is connected with a locking nut (31) and a top rubber block (18), a dust cover (20) is arranged between the lower mounting seat (8) and the bottom of the piston (28), a capsule skin (21) is arranged between the lower mounting seat (8) and the top of the piston (28), and the two ends of the capsule skin (21) are provided with buckling rings (22).

5. The multi-bearing air spring of claim 4, wherein: The upper bearing seat (1) is internally provided with the top rubber block (18) and a sealing cover (23), the top of the top rubber block (18) is in abutment with the sealing cover (23), a buffer block (19) is arranged on the shock absorber piston rod (17), the bottom of the upper bearing seat (1) is provided with a clamping block (32), and the clamping block (32) is clamped with the bottom of the buffer block (19).

6. The multi-bearing air spring of claim 5, wherein: The upper bearing seat (1) is further internally provided with a reinforcing plate (24), the end of the reinforcing plate (24) is in contact with the end of the sealing cover (23); and the upper bearing seat (1) is further internally provided with a second check ring (25), the second check ring (25) is in abutment with the end of the reinforcing plate (24).

7. The multi-bearing air spring of claim 6, wherein: A first sealing ring (11) is arranged between the sealing cover (23) and the inner side of the upper bearing seat (1); and a second sealing ring (12) is arranged between the upper bearing seat (1) and the inner side of the lower mounting seat (8).

8. The multi-bearing air spring of any of claims 4-7, wherein: A third sealing ring (13) and a gasket (26) are arranged on the shock absorber outer cylinder (16), a tray (27) is welded and fixed to the outside of the shock absorber outer cylinder (16), the third sealing ring (13), the gasket (26) and the tray (27) are sequentially arranged, the inner side of the piston (28) is in abutment with the end of the tray (27), the two sides of the gasket (26) are respectively in abutment with the third sealing ring (13) and the tray (27); a pressure maintaining valve (29) is arranged in the piston (28), the bottom end of the pressure maintaining valve (29) extends out of the piston (28), a fourth sealing ring (14) is arranged between the pressure maintaining valve (29) and the piston (28).

9. An automotive suspension characterized by: An air spring comprising the multi-bearing of any one of claims 1-8.

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