Air spring with multiple bearings and automobile suspension

Abstract

The air spring comprises a bearing installation seat and a lower installation seat, the lower installation seat is arranged at the bottom of the bearing installation seat, an automobile body installation seat is arranged outside the bearing installation seat, a first bearing is arranged at the top of the bearing installation seat, and a second bearing is arranged between the bearing installation seat and the automobile body installation seat. According to the air spring with the multiple bearings, the design requirement for bearing lateral force and torsional force of the air spring is met, and the sealing performance is reliable.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of automobile suspension, specifically, the utility model relates to an air spring with multiple bearings and automobile suspension. BACKGROUND

[0002] In the development process of the automobile industry, people's pursuit of comfort and intelligence is increasingly high. Under this trend, traditional metal coil springs are gradually replaced by air springs. Air springs, with the elasticity of compressed air, exhibit ideal nonlinear elastic characteristics, can greatly improve the ride comfort, optimize the vehicle handling performance, and better meet the advanced needs of the current automobile industry.

[0003] The Macpherson suspension system is an independent suspension system widely used in the front wheels of automobiles, mainly composed of a coil spring, a shock absorber, a lower control arm, a shock absorber combined with the spring, a column, etc., and the lower control arm has various forms. The Macpherson suspension layout is compact and has limited space, and the air spring assembled therein must withstand great lateral force and torsional force. The design of traditional air springs has limitations and cannot meet such stringent performance requirements.

[0004] 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, both ends of the air bag are sleeved on the outer walls of the piston and the end cover, and the three form a sealed chamber; it also comprises a bearing for bearing torsional force and 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 simultaneously abuts against the bearing seat and the piston. The air spring cannot solve the above-mentioned technical problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at the deficiencies of the prior art, and provides an air spring with multiple bearings and automobile suspension that meets the design requirements of bearing lateral force and torsional force and has reliable sealing performance.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0007] The air spring with multiple bearings comprises a bearing mounting seat and a lower mounting seat, the lower mounting seat is arranged at the bottom of the bearing mounting seat, the bearing mounting seat is externally provided with a vehicle body mounting seat, the top of the bearing mounting seat is provided with a first bearing, and the second bearing is arranged between the bearing mounting seat and the vehicle body mounting seat.

[0008] The bottom of the bearing mounting seat is provided with a limiting groove, the top of the lower mounting seat is provided with a limiting boss, and the limiting boss is in interference fit with the limiting groove.

[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 shock absorber piston rod top end extends into the bearing mounting seat and is connected with the top rubber block with a locking nut, the lower mounting seat is connected with the piston bottom with a dust cover, the lower mounting seat and the piston top are provided with a capsule skin, and the capsule skin two ends are provided with buckling rings.

[0010] The bearing mounting seat is provided with a top rubber block and a sealing cover, the top of the top rubber block is in abutment with the sealing cover, a buffer block is sleeved on the shock absorber piston rod, and the bottom of the bearing mounting seat is provided with a clamping protrusion, the clamping protrusion is clamped with the bottom of the buffer block.

[0011] The sealing cover is in a cross-section of a Chinese character structure, a reinforcing plate is sleeved in the middle of the sealing cover, and the end of the reinforcing plate is in contact with the end of the sealing cover; the bearing mounting seat is also provided with a check ring, and the check ring is in abutment with the end of the reinforcing plate.

[0012] The sealing cover is provided with a first mounting groove, the first mounting groove is provided with a first sealing ring, and the first sealing ring is located between the inside of the sealing cover and the bearing mounting seat; the bearing mounting seat is provided with a second mounting groove, the second mounting groove is provided with a second sealing ring, and the second sealing ring is located between the inside of the bearing mounting seat and the lower mounting seat.

[0013] The shock absorber outer cylinder is sleeved with a third sealing ring and a gasket, the shock absorber outer cylinder is welded and fixed with a tray outside, the third sealing ring, the gasket and the tray are sequentially arranged, the inside of the piston is in abutment with the end of the tray, and the two sides of the gasket are in abutment with the third sealing ring and the tray respectively.

[0014] The inside 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.

[0015] The automobile suspension includes the air spring with multiple bearings.

[0016] The technical effect of the air spring with multiple bearings is as follows: the air spring with multiple bearings is provided with two bearings on the upper and lower sides of the bearing mounting seat, the relative rotation of the bearing mounting seat and the vehicle body mounting seat or the vehicle body is allowed, the design requirements that the air spring needs to bear lateral force and torsional force are met, the torsional failure of the capsule skin is avoided, the service life of the air spring is improved, the bearing mounting seat and the lower mounting seat are limited from radial torsion through the interference fit of the limiting recess and the limiting boss, and the air spring is provided with multiple sealing rings and has reliable sealing performance. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present specification includes the following drawings, and the shown contents are as follows:

[0018] Figure 1 It is a cross-sectional schematic view of the air spring with multiple bearings.

[0019] Figure 2 is a partial sectional view schematic diagram of the air spring with multiple bearings of the utility model;

[0020] Figure 3 is a partial sectional view schematic diagram of the air spring with multiple bearings of the utility model;

[0021] Figure 4 is a cooperation schematic diagram of the limiting boss and the limiting groove of the utility model;

[0022] Figure 5 is a sectional view schematic diagram of the sealing cover and the reinforcing plate of the utility model.

[0023] Marked in the figure: 1, bearing mounting seat, 2, lower mounting seat, 3, vehicle body mounting seat, 4, first bearing, 5, second bearing, 6, piston, 7, shock absorber outer cylinder, 8, shock absorber piston rod, 9, top rubber block, 10, buffer block, 11, first sealing ring, 12, second sealing ring, 13, third sealing ring, 14, fourth sealing ring, 15, dust cover, 16, capsule skin, 17, buckling ring, 18, limiting boss, 19, limiting groove, 20, sealing cover, 21, reinforcing plate, 22, check ring, 23, gasket, 24, tray, 25, working cavity, 26, pressure retaining valve, 27, first mounting groove, 28, locking nut, 29, clamping protrusion, 30, second mounting groove. DETAILED DESCRIPTION

[0024] The specific embodiments of the utility model are further explained in detail below by describing the embodiments with reference to the drawings, 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 to help its implementation.

[0025] As Figure 1 shown, the air spring with multiple bearings includes bearing mounting seat 1 and lower mounting seat 2, lower mounting seat 2 is arranged at the bottom of bearing mounting seat 1, bearing mounting seat 1 is externally provided with vehicle body mounting seat 3, bearing mounting seat 1 is provided with first bearing 4 at the top, and second bearing 5 is arranged between bearing mounting seat 1 and vehicle body mounting seat 3. Vehicle body mounting seat 3 is arranged between bearing mounting seat 1 and lower mounting seat 2, which is used to be connected with the vehicle body; first bearing 4 is arranged between bearing mounting seat 1 and the vehicle body, which allows relative rotation between bearing mounting seat 1 and the vehicle body and bears axial force, lateral force and torsional force; second bearing 5 is arranged between bearing mounting seat 1 and vehicle body mounting seat 3, which allows relative rotation between bearing mounting seat and vehicle body mounting seat 3 and bears axial force and torsional force, avoids torsional failure of capsule skin 16 and improves the service life of the air spring.

[0026] 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 chamber; the bearing assembly comprises, from top to bottom, a first bearing 4, a bearing mounting seat 1, a second bearing 5 and a vehicle body mounting seat 3; the spring assembly comprises a top rubber assembly and a buffer block 10, and the top rubber assembly and the buffer block 10 are both mounted in the bearing mounting seat 1.

[0027] As shown in Figure 4 , the bottom of the bearing mounting seat 1 is provided with a limiting groove 19, and the top of the lower mounting seat 2 is provided with a limiting boss 18, and the limiting boss 18 and the limiting groove 19 are in interference fit. The above structure limits the radial torsion between the bearing mounting seat 1 and the lower mounting seat 2 through the interference fit between the limiting groove 19 and the limiting boss 18.

[0028] As shown in Figures 1 to 3 , the air spring shock absorber with multiple bearings comprises a shock absorber outer cylinder 7 and a shock absorber piston rod 8, the top end of the shock absorber piston rod 8 extends into the bearing mounting seat 1 and is connected with the top rubber block 9 through a locking nut 28, a dust cover 15 is connected between the lower mounting seat 2 and the bottom of the piston 6, a bladder skin 16 is arranged between the lower mounting seat 2 and the top of the piston 6, and the bladder skin 16 is provided with a buckling ring 17 at both ends. One end of the dust cover 15 is sleeved on the lower mounting seat 2, and the other end is sleeved on the piston 6; one end of the bladder skin 16 is fixed on the lower mounting seat 2 through the buckling ring 17, so as to realize the sealed connection between the lower mounting seat 2 and the bladder skin 16, the other end of the bladder skin 16 is fixed on the piston 6 through the buckling ring 17, so as to realize the sealed connection between the piston 6 and the bladder skin 16; the bladder skin 16 fixed on the end of the lower mounting seat 2 has a relatively large diameter, and the change in diameter between the free state and the inflated state is not obvious, the bladder skin 16 fixed on the end of the piston 6 has a small diameter and is folded along the piston 6.

[0029] As shown in Figure 2 , the bearing mounting seat 1 is provided with a top rubber block 9 and a sealing cover 20, the top of the top rubber block 9 abuts against the sealing cover 20, a buffer block 10 is sleeved on the shock absorber piston rod 8, the bottom of the bearing mounting seat 1 is provided with a clamping protrusion 29, and the clamping protrusion 29 is clamped with the bottom of the buffer block 10. The top rubber block 9 is fixedly connected with the shock absorber piston rod 8 through the locking nut 28, and the clamping protrusion 29 is in the shape of an inverted hook, so as to firmly connect the buffer block 10 with the bearing mounting seat 1. When the vehicle runs on uneven road surface, the top rubber block 9 can buffer the impact between the vehicle body and the vehicle body, reduce the tire noise generated by the tire and the ground friction, reduce the spread of noise, and improve the comfort of driving and riding. The buffer block 10 can limit the movement limit position of the shock absorber piston rod, avoid the impact between the shock absorber and the working chamber 25, 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.

[0030] AsFigure 5 As shown, the sealing cover 20 is in the shape of a Chinese character, and a reinforcing plate 21 is sleeved in the middle of the sealing cover 20, and the end of the reinforcing plate 21 is in contact with the end of the sealing cover 20. A retaining ring 22 is further arranged in the bearing mounting seat 1, and the end of the retaining ring 22 is in contact with the end of the reinforcing plate 21. The upper end of the sealing cover 20 is further provided with a reinforcing plate 21. The upper end of the reinforcing plate 21 is provided with a retaining ring 22 of the sealing cover 20, which is used to fix the sealing cover 20 and the reinforcing plate 21. The sealing cover 20 is sealed and connected with the bearing mounting seat 1 through the first sealing ring 11. The middle of the reinforcing plate 21 is provided with a hole which is matched with the protruding part in the middle of the sealing cover 20. The end of the reinforcing plate 21 is in contact with the end of the sealing cover 20. The retaining ring 22 limits the reinforcing plate 21, thereby improving the installation stability and the sealing stability of the sealing cover 20.

[0031] As shown in Figure 1 and Figure 2 , the sealing cover 20 is provided with a first mounting groove 27, and the first mounting groove 27 is provided with a first sealing ring 11. The first sealing ring 11 is located between the sealing cover 20 and the inner side of the bearing mounting seat 1. The bearing mounting seat 1 is provided with a second mounting groove 30, and the second mounting groove 30 is provided with a second sealing ring 12. The second sealing ring 12 is located between the bearing mounting seat 1 and the inner side of the lower mounting seat 2. The bearing mounting seat 1 and the lower mounting seat 2 are sealed and connected through the second sealing ring 12. The lower mounting seat 2 is in contact with the bearing mounting seat 1 in the axial direction.

[0032] As shown in Figure 3 , the shock absorber outer cylinder 7 is sleeved with a third sealing ring 13 and a gasket 23. The shock absorber outer cylinder 7 is welded and fixed with a tray 24. The third sealing ring 13, the gasket 23 and the tray 24 are arranged in sequence. The inner side of the piston 6 is in contact with the end of the tray 24. The two sides of the gasket 23 are in contact with the third sealing ring 13 and the tray 24 respectively. The piston gasket 23 is sleeved on the shock absorber outer cylinder 7 and is in contact with the shock absorber tray 24. The third sealing ring 13 is sleeved on the shock absorber outer cylinder 7 and is in contact with the piston gasket 23. The piston 6 is sleeved on the shock absorber outer cylinder 7 and is in contact with the piston gasket 23, thereby realizing the sealed connection between the piston 6 and the shock absorber outer cylinder 7.

[0033] As shown in Figure 3 , the piston 6 is provided with a pressure maintaining valve 26. The bottom end of the pressure maintaining valve 26 extends out of the piston 6. The fourth sealing ring 14 is arranged between the pressure maintaining valve 26 and the piston 6. When the air spring pipeline is disconnected or leaks, the pressure maintaining valve 26 can ensure that a certain air pressure is maintained in the air spring, thereby avoiding the situation that the vehicle is unstable due to the instantaneous loss of air pressure. The pressure maintaining valve 26 can also be connected to the end of the lower mounting seat 2, without specific limitation.

[0034] The automobile suspension includes the air spring with multiple bearings described above.

[0035] The installation method of the air spring with multiple bearings includes the following steps:

[0036] Step 1, install the shock absorber and piston 6, and install the bumper block 10 on the shock absorber piston rod 8;

[0037] Step 2, install the first bearing 4, the second bearing 5 and the vehicle body mounting seat 3 in sequence outside the bearing mounting seat 1, and match the limiting boss 18 with the limiting groove 19 to seal and connect the lower mounting seat 2 with the bearing mounting seat 1;

[0038] Step 3, connect the bumper block 10 with the bearing mounting seat 1, extend the shock absorber piston rod 8 into the bearing mounting seat 1 and fix it with the locking nut 28, and seal the middle part of the bearing mounting seat 1 with the sealing cover 20 and the reinforcing plate 21;

[0039] Step 4, lock the ends of the capsule skin 16 with the clamping ring 17, and fix the two ends of the dust cover 15 by clamping;

[0040] Step 5, connect the vehicle body through the vehicle body mounting seat 3.

[0041] The specific installation method is: the pressure retaining valve 26 is fixed with the piston 6 in advance, the shock absorber and the piston 6 are sealed and connected in sequence by using the third sealing ring 13, the gasket 26 and the tray 27, the bottom of the bearing mounting seat 1 is connected and fixed with the bumper block 19, the first bearing 4 and the second bearing 5 are installed on the upper and lower sides of the bearing mounting seat 1 respectively, then the lower mounting seat 2 is installed, and the radial torsion of the bearing mounting seat 1 and the lower mounting seat 2 is limited by the cooperation of the limiting boss 18 and the limiting groove 19, the bearing mounting seat 1 and the lower mounting seat 2 are sealed and connected by using the sealing ring, the shock absorber piston rod 17 is connected with the bearing mounting seat 1, and the sealing cover 20 is installed to seal the bearing mounting seat 1, the two ends of the capsule skin 16 are respectively pressed on the lower mounting seat 2 and the piston 6 by using two clamping rings 17, and the two ends of the dust cover 15 are respectively clamped and fixed on the lower mounting seat 2 and the piston 6, after the above components are installed, detection and inflation operation are carried out, and after ensuring that the air spring performance is normal, the vehicle body is connected with the vehicle body through the vehicle body mounting seat 3

[0042] The above installation method is simple and easy to operate, and does not increase the use of connecting parts in the operation process, which is conducive to improving the assembly efficiency, so that the entire system can be designed more compact in the radial dimension, thereby adapting to complex or narrow installation areas, fully utilizing the axial space, and achieving the relative rotation purpose of the bearing mounting seat 1 and the vehicle body and the vehicle body mounting seat 3.

[0043] The air spring with multiple bearings allows the relative rotation of the bearing mounting seat 1 and the vehicle body and the vehicle body mounting seat 3, meets the design requirements of the air spring needing to bear lateral force and torsional force, avoids the torsional failure of the bladder skin 16, improves the service life of the air spring, the bearing mounting seat 1 and the lower mounting seat 2 are limited in the radial torsion therebetween through the interference fit of the limiting recess 19 and the limiting boss 18, the air spring is provided with multiple sealing rings and has reliable sealing performance.

[0044] The utility model has been described exemplarily above in combination with the drawings. Apparently, the specific implementation of the utility model is not limited by the above-mentioned mode. As long as various non-essential improvements are made by adopting 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 of which are within the protection scope of the utility model.

Claims

1. An air spring with multiple bearings, characterized in that: Including bearing mounting seat (1) and lower mounting seat (2), the lower mounting seat (2) is provided at the bottom of bearing mounting seat (1), the outer part of bearing mounting seat (1) is provided with vehicle body mounting seat (3), the top of bearing mounting seat (1) is provided with first bearing (4), and the second bearing (5) is arranged between bearing mounting seat (1) and vehicle body mounting seat (3).

2. The multi-bearing air spring of claim 1, wherein: The bottom of bearing mounting seat (1) is provided with limiting groove (19), and the top of lower mounting seat (2) is provided with limiting boss (18), and the limiting boss (18) is in interference fit with limiting groove (19).

3. The multi-bearing air spring of claim 1 or 2, wherein: It also includes piston (6) and shock absorber, the shock absorber includes shock absorber outer cylinder (7) and shock absorber piston rod (8), the top end of shock absorber piston rod (8) extends into bearing mounting seat (1) and is connected with locking nut (28) with top rubber block (9), dust cover (15) is connected between lower mounting seat (2) and the bottom of piston (6), and bag skin (16) is arranged between the top of lower mounting seat (2) and piston (6), and the both ends of bag skin (16) are provided with buckling ring (17).

4. The multi-bearing air spring of claim 3, wherein: The top of top rubber block (9) is in abutment with sealing cover (20), the shock absorber piston rod (8) is provided with buffer block (10), the bottom of bearing mounting seat (1) is provided with clamping protrusion (29), and the bottom of buffer block (10) is clamped with clamping protrusion (29).

5. The multi-bearing air spring of claim 4, wherein: The cross section of sealing cover (20) is a few Chinese characters structure, the middle part of sealing cover (20) is provided with reinforcing plate (21), and the end of reinforcing plate (21) is in contact with the end of sealing cover (20); the bearing mounting seat (1) is also provided with retaining ring (22), and the end of retaining ring (22) is in abutement with reinforcing plate (21).

6. The multi-bearing air spring of claim 5, wherein: The first mounting groove (27) is provided on the sealing cover (20), the first sealing ring (11) is arranged in the first mounting groove (27), and the first sealing ring (11) is located between the inside of sealing cover (20) and bearing mounting seat (1); the second mounting groove (30) is arranged in the bearing mounting seat (1), the second sealing ring (12) is arranged in the second mounting groove (30), and the second sealing ring (12) is located between the inside of bearing mounting seat (1) and lower mounting seat (2).

7. The multi-bearing air spring of claim 6, wherein: The third sealing ring (13) and gasket (23) are arranged on the shock absorber outer cylinder (7), the tray (24) is welded and fixed on the outside of shock absorber outer cylinder (7), the third sealing ring (13), gasket (23) and tray (24) are sequentially arranged, the end of tray (24) is in abutement with the inside of piston (6), and the both sides of gasket (23) are in abutement with third sealing ring (13) and tray (24) respectively.

8. The multi-bearing air spring of claim 3, wherein: The inside of piston (6) is provided with pressure retaining valve (26), the bottom end of pressure retaining valve (26) extends out of piston (6), and the fourth sealing ring (14) is arranged between pressure retaining valve (26) and piston (6).

9. An automotive suspension characterized by: The air spring with multiple bearings in any one of claims 1-8 is provided.

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