Air spring and shock absorber combination shock absorbing device

Abstract

The utility model relates to air spring belt shock absorber body structure technical field for passenger car suspension, disclose a kind of air spring and shock absorber combination damping device, including shock absorber body and top seat, the shock absorber body includes cylinder barrel and the piston rod being arranged in cylinder barrel, top seat center has top seat hole, and top seat hole in top seat is equipped with top glue, and piston rod top end is connected with top glue by shock absorber nut;The cylinder barrel outside is equipped with torsion piston cylinder, and the lower part outer wall of cylinder barrel is protruded and has bearing support, and rotating bearing is fixed on bearing support, and the bottom of torsion piston cylinder is connected with rotating bearing corresponding;Sealing connection between torsion piston cylinder and top seat is equipped with the air spring skin bag of the utility model. The utility model can be self-adapting to cope with the big yaw and big torsion damping condition of vehicle when jolt, so that the yaw angle of combination damping device adaptation reaches more than 7 °, and torsion angle is more than 10 °, effectively protects air spring skin bag, and improves the service life of entire device.

Description

TECHNICAL FIELD

[0001] The utility model relates to air spring with shock absorber body structure technical field for passenger car suspension, especially to a kind of air spring and shock absorber combination shock absorber. BACKGROUND

[0002] Passenger car air spring with shock absorber body upper end is connected with vehicle body, lower end is connected with chassis support, and vehicle body height is adjusted by inflation or deflation, and vehicle body can be raised when passing rugged road, deceleration zone etc., ground clearance is increased, and passability is improved;Vehicle body is lowered when high-speed driving, gravity center is lowered, wind resistance is reduced, driving stability and fuel economy are improved, and it is also convenient to load and unload goods and get on and off vehicle, and it is important component of passenger car chassis suspension system.Air spring or shock absorber plays the role of absorbing and filtering bump and vibration from road, provides comfortable riding environment for people in vehicle, and can automatically adjust stiffness according to load change, and good damping effect can be maintained when empty and full.

[0003] With the improvement of people's living standards, rugged mountain road, beach, the requirement of off-road performance of vehicle is more and more demanding;Therefore, air spring and shock absorber combination appear, under the demand of improving off-road performance, how does vehicle shock absorber face the problem of large torsion and large yaw, it is the key link of improving off-road damping performance, and it is also the outstanding problem of shock absorber in industry.Existing air spring cannot bear large torsion and yaw angle, if it is in large torsion and yaw angle vehicle condition for a long time, fatigue performance of air spring bladder will be greatly affected, and the performance of air spring and shock absorber combination will be affected;How does air spring overcome the problem of large yaw and large torsion is the technical bottleneck of air spring in vehicle shock absorber, and it is not conducive to the popularization and application of air spring, which is the technical problem to be solved at present. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the technical problems pointed out in the background art, and provides an air spring and shock absorber combination shock absorber device, which can adaptively cope with large yaw and large torsion damping conditions when vehicle bumps.

[0005] The utility model aims at solving the technical problems pointed out in the background art, and provides an air spring and shock absorber combination shock absorber device, which can adaptively cope with large yaw and large torsion damping conditions when vehicle bumps.

[0006] An air spring and shock absorber combination shock absorber device, comprising shock absorber body and top seat, the shock absorber body comprises cylinder and piston rod arranged in the cylinder, the top seat has top seat hole in the center, the top seat hole is provided with top rubber, and the piston rod top end is connected with the top rubber through shock absorber nut;The cylinder is externally sleeved with torsion piston cylinder, the lower part of the cylinder is provided with bearing support on outer wall, the bearing support is fixedly connected with rotary bearing, and the bottom end of the torsion piston cylinder is connected with the rotary bearing correspondingly;Air spring bladder is sealingly connected between the torsion piston cylinder and the top seat.

[0007] In order to better realize the utility model, the buffer block for assisting the flexible support of the piston rod is arranged in the top seat hole of the top seat, the buffer limiting sleeve is arranged at the top end of the cylinder barrel, and the buffer block and the buffer limiting sleeve form a lifting buffer spacing.

[0008] Preferably, the rotating bearing comprises a bearing A and a bearing B which are rotationally connected with each other, the bearing A is connected and fixed with the inner cylinder wall of the lower end of the torsion piston barrel through the yawing torsion bushing, and the bearing B is connected and fixed with the bearing support.

[0009] Preferably, the yawing spacing space is formed between the outer wall of the buffer limiting sleeve and the inner wall of the top end of the torsion piston barrel.

[0010] Preferably, the protective cylinder is arranged on the torsion piston barrel through the connection of the protective cylinder connecting support, the movable space of the bladder is formed between the inner wall of the protective cylinder and the outer wall of the torsion piston barrel, the dust cover is arranged on the outer part of the torsion piston barrel, the bottom end of the dust cover is connected with the bearing support, and the top end of the dust cover is connected with the bottom end of the protective cylinder through the hoop clamping.

[0011] Preferably, the top end of the air spring bladder is clamped and fixed to the outer side wall of the lower end of the top seat through the clamping ring A, and the bottom end of the air spring bladder is clamped and fixed to the outer side wall of the upper end of the torsion piston barrel through the clamping ring B.

[0012] Preferably, the yawing torsion bushing comprises a metal sleeve framework, a rubber layer and a flange metal framework from inside to outside in sequence, the flange metal framework is connected and fixed with the inner cylinder wall of the lower end of the torsion piston barrel, and a plurality of sealing rings B are arranged between the flange metal framework and the inner wall of the torsion piston barrel.

[0013] Preferably, the metal sleeve framework is in dynamic contact with the cylinder barrel, the lower end of the metal sleeve framework has a notch, the lower part of the notch of the metal sleeve framework is provided with a check ring B, and the upper part of the notch of the metal sleeve framework is provided with a sealing ring C.

[0014] Preferably, the top end of the protective cylinder is outwardly turned to have a turned edge structure.

[0015] Preferably, the top cover is connected with the top seat hole of the top seat through the locking screw, and the top cover completely covers the shock absorber nut; the check ring A and the sealing ring A which are matched with the top cover are arranged in the top seat hole of the top seat.

[0016] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0017] The utility model can adaptively cope with the large yawing and large torsion damping of the vehicle in the bumping, so that the yawing angle of the combined damping device is more than 7°, the torsion angle is more than 10°, the air spring bladder is effectively protected, and the service life of the whole device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Figure 1 is a structural schematic diagram of the air spring and shock absorber combined shock absorbing device of the present application;

[0019] Figure 2 Figure 2 is a schematic diagram of the yaw working principle of the present application;

[0020] Figure 3 Figure 3 is a schematic diagram of the torsion working principle of the present application;

[0021] Figure 4 Figure 4 is a structural schematic diagram of the main structure of the shock absorber assembly of the present application;

[0022] Figure 5 Figure 5 is a structural schematic diagram of the yaw and torsion bushing of the present application;

[0023] Figure 6 Figure 6 is a structural schematic diagram of the protective tube of the present application.

[0024] In the drawings, the names corresponding to the reference signs in the drawings are:

[0025] 1 - locking screw, 2 - top cover, 3 - check ring A, 4 - sealing ring A, 5 - top seat, 6 - shock absorber nut, 7 - top rubber, 8 - pressure retaining valve, 9 - clamping ring A, 10 - buffer block, 11 - air spring bladder, 12 - inner pressure ring, 13 - protective tube, 131 - flange structure, 14 - torsion piston tube, 15 - clamping ring B, 16 - yaw and torsion bushing, 161 - metal sleeve skeleton, 162 - rubber layer, 163 - flange metal skeleton, 17 - sealing ring B, 18 - sealing ring C, 19 - check ring B, 20 - rotary bearing, 201 - bearing A, 202 - bearing B, 21 - dust cover, 22 - clamp, 23 - shock absorber body, 231 - bearing support, 232 - cylinder, 2321 - buffer limiting sleeve, 233 - piston rod. DETAILED DESCRIPTION

[0026] The present application will be further described in detail below in combination with the embodiments:

[0027] Embodiment

[0028] As Figure 1As shown in the figure, an air spring and shock absorber combined shock absorbing device includes a shock absorber body 23 and an air spring bag 11, the shock absorber body 23 includes a top seat 5, a torsion piston cylinder 14, a cylinder 232 and a piston rod 233 arranged in the cylinder 232 (the shock absorber body 23 of the utility model can adopt the existing mature shock absorber, the utility model only shows the main components of the shock absorber body 23, and some shock absorbers contain electromagnetic valves and other structures which are not structurally illustrated on the figure), the top seat 5 is provided with a top seat hole in the center, a top rubber 7 is mounted in the top seat hole of the top seat 5, a pressure maintaining valve 8 is preferably mounted on the top seat 5, the top end of the piston rod 233 is connected with the top rubber 7 through a shock absorber nut 6 (the top rubber 7 is a flexible structure, and the piston rod 233 can perform a yawing motion), and a buffer block 10 for assisting in flexibly supporting the piston rod 233 is further arranged in the top seat hole of the top seat 5 (the buffer block 10 is made of a flexible material, and when the piston rod 233 performs a yawing motion, the buffer block 10 performs adaptive flexible cooperation; the buffer block 10 of the utility model is composed of a body and a reinforcing ring, the body is made of PU material, and the reinforcing ring is made of aluminum alloy material). The torsion piston cylinder 14 is sleeved outside the cylinder 232, the outer wall of the middle and lower part of the cylinder 232 (i.e. the middle and lower part of the cylinder 232, which can also be the middle part or the lower part) is outwardly protruded to have a bearing seat 231 (the bearing seat 231 is designed with a 1mm groove for assembling a rotating bearing 20), and the rotating bearing 20 (made of polytetrafluoroethylene) is fixed on the bearing seat 231. The rotating bearing 20 includes two bearing parts which are rotatably connected with each other, one of the bearing parts is connected with the cylinder 232, and the other bearing part is connected with the torsion piston cylinder 14. Figure 2 As shown in the figure, the two bearing parts of the rotating bearing 20 are bearing A201 and bearing B202 respectively, the bearing A201 is fixedly connected with the inner cylinder wall of the lower end of the torsion piston cylinder 14 through a yawing torsion bushing 16, and the bearing B202 is fixedly connected with the bearing seat 231.

[0029] The air spring bag 11 is sealingly connected between the torsion piston cylinder 14 and the top seat 5 (the bag skin is made of NR+CR material, and the thickness of the bag skin is controlled to be about 3mm). Figure 1 As shown in the figure, the top end of the air spring bag 11 is fixed on the lower end of the outer side wall of the top seat 5 through a buckling ring A9, and the bottom end of the air spring bag 11 is fixed on the upper end of the outer side wall of the torsion piston cylinder 14 through a buckling ring B15. Preferably, a plurality of internal pressure rings 12 (the internal pressure rings 12 can be connected with the buffer block 10) are further arranged in the air spring bag 11 as internal supports.

[0030] The cylinder 232 is provided with a buffer limiting sleeve 2321 at the top end, and the buffer block 10 and the buffer limiting sleeve 2321 form a lifting buffer spacing. The outer wall of the buffer limiting sleeve 2321 and the inner wall of the top end of the torsion piston cylinder 14 form a yawing spacing space.

[0031] In some embodiments, the outer part of the torsion piston cylinder 14 is connected with the protective cylinder 13 through the protective cylinder connecting support (the protective cylinder 13 has a wall thickness of 2.5 mm, is made of 6061, has a tensile strength of ≥ 150 MPa, and a yield strength of ≥ 100 MPa), and preferably, the top end of the protective cylinder 13 is outwardly turned to have a turn-up structure 131 (the turn-up angle is adapted to the air spring bladder 11, and after the bladder is inflated, the turn-up angle is tangent to the inflated outer diameter, which has a large protective effect on the yaw and torsional fatigue of the bladder. In the working state, the size of the circular arc is tangent, so as to protect the yaw and torsion of the air spring bladder 11, and prevent sand and dust from entering the gap between the protective cylinder 13 and the air spring bladder 11, and prevent the air spring bladder 11 from being abraded). The inner wall of the protective cylinder 13 and the outer wall of the torsion piston cylinder 14 form a bladder moving space. The outer part of the torsion piston cylinder 14 is sleeved with a dust cover 21, the bottom end of the dust cover 21 is connected with a bearing support 231, and the top end of the dust cover 21 is tightly connected with the bottom end of the protective cylinder 13 through a clamp 22.

[0032] In some embodiments, as shown in Figure 5 , the yaw and torsion sleeve 16 is sequentially composed of a metal sleeve framework 161, a rubber layer 162 (the rubber material is natural rubber NR), and a flange metal framework 163 from inside to outside, the flange metal framework 163 is fixedly connected with the inner cylinder wall of the lower end of the torsion piston cylinder 14, and a plurality of sealing rings B17 are arranged between the flange metal framework 163 (the material of the flange metal framework 163 in the embodiment can be 6061#) and the inner wall of the torsion piston cylinder 14.

[0033] In some embodiments, as shown in Figure 1 , the metal sleeve framework 161 is in dynamic contact with the cylinder 232, the lower end of the metal sleeve framework 161 has a notch, the lower part of the notch of the metal sleeve framework 161 is provided with a check ring B19, and the upper part of the notch of the metal sleeve framework 161 is provided with a sealing ring C18. The top cover 2 is connected with the top seat hole of the top seat 5 through a locking screw 1, and the top cover 2 completely covers the shock absorber nut 6. The top seat hole of the top seat 5 is provided with a check ring A3 and a sealing ring A4 matched with the top cover 2.

[0034] In use, the bottom part (specifically, the cylinder 232) of the shock absorber body 23 is connected to the wheel connecting support (the wheel hub of the passenger car or vehicle is provided with the wheel connecting support) of the passenger car or vehicle, and the top cover or the top seat 5 is connected with the vehicle body. When the vehicle encounters rough road surfaces, speed bumps, etc., as shown in Figure 2 , the end of the piston rod 233 is eccentric in the center of the top rubber 7, and the piston rod 233, the cylinder 232, the air spring bladder 11 and other components are adaptively eccentric, so that the air spring bladder 11 and the shock absorber body 23 can adapt to the eccentric movement of the road bumps, and effectively protect the air spring bladder 11 and other components. As shown in Figure 3As shown, if the vehicle bounces and the wheel twists, the air spring bag 11 and the torsion piston cylinder 14 form an outer torsion unit, the cylinder 232 forms an inner torsion unit, the bearing A201 of the rotary bearing 20 is connected with the outer torsion unit, the bearing B202 of the rotary bearing 20 is connected with the inner torsion unit, the bearing A201 and the bearing B202 are rotationally matched (i.e. torsionally matched) with each other, thereby absorbing torsion forces of different degrees and effectively protecting the air spring bag 11 (the air spring is relatively small in relative torsion, the protection of the air spring assembly bag skin 11 is realized by torsion, and the service life of the air spring bag 11 is improved) and the shock absorber body 23.

[0035] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An air spring and shock absorber combination shock absorbing device, characterized by: The shock absorber body (23) includes a cylinder (232) and a piston rod (233) arranged in the cylinder (232), the top seat (5) has a top seat hole in the center, a top rubber (7) is mounted in the top seat hole of the top seat (5), the top end of the piston rod (233) is connected with the top rubber (7) through a shock absorber nut (6), the cylinder (232) is externally sleeved with a torsion piston cylinder (14), the outer wall of the lower part of the cylinder (232) is protruded with a bearing support (231), a rotating bearing (20) is fixed on the bearing support (231), the bottom end of the torsion piston cylinder (14) is connected with the rotating bearing (20) correspondingly, and the torsion piston cylinder (14) and the top seat (5) are sealingly connected with the air spring skin bag (11) therebetween.

2. The air spring and shock absorber combination shock absorbing device of claim 1, wherein: The top seat hole of the top seat (5) is further provided with a buffer block (10) for assisting the flexible support of the piston rod (233), the top end of the cylinder (232) is mounted with a buffer limiting sleeve (2321), and the buffer block (10) and the buffer limiting sleeve (2321) form a lifting buffer spacing.

3. The air spring and shock absorber combination shock absorbing device of claim 1, wherein: The rotating bearing (20) includes a bearing A (201) and a bearing B (202) which are rotatably connected with each other, the bearing A (201) is fixedly connected with the inner cylinder wall of the lower end of the torsion piston cylinder (14) through a deflection torsion sleeve (16), and the bearing B (202) is fixedly connected with the bearing support (231).

4. The air spring and shock absorber combination shock absorbing device of claim 2, wherein: The deflection spacing space is formed between the outer wall of the buffer limiting sleeve (2321) and the inner wall of the top end of the torsion piston cylinder (14).

5. The air spring and shock absorber combination shock absorbing device of claim 1, wherein: The outer part of the torsion piston cylinder (14) is connected with a protection cylinder (13) through a protection cylinder connecting support, the inner wall of the protection cylinder (13) and the outer wall of the torsion piston cylinder (14) form a skin bag movement space therebetween, a dust cover (21) is externally sleeved on the torsion piston cylinder (14), the bottom end of the dust cover (21) is connected with the bearing support (231), and the top end of the dust cover (21) is clampedly connected with the bottom end of the protection cylinder (13) through a clamp (22).

6. The air spring and shock absorber combination shock absorbing device of claim 1, wherein: The top end of the air spring skin bag (11) is fixedly buckled on the outer side wall of the lower end of the top seat (5) through a buckling ring A (9), and the bottom end of the air spring skin bag (11) is fixedly buckled on the outer side wall of the upper end of the torsion piston cylinder (14) through a buckling ring B (15).

7. The air spring and shock absorber combination shock absorbing device of claim 3, wherein: The deflection torsion sleeve (16) is sequentially composed of a metal sleeve framework (161), a rubber layer (162) and a flange metal framework (163) from inside to outside, the flange metal framework (163) is fixedly connected with the inner cylinder wall of the lower end of the torsion piston cylinder (14), and a plurality of sealing rings B (17) are arranged between the flange metal framework (163) and the inner wall of the torsion piston cylinder (14).

8. The air spring and shock absorber combination shock absorbing device of claim 7, wherein: The metal sleeve framework (161) is in dynamic contact with the cylinder (232), the lower end of the metal sleeve framework (161) has a notch, the lower part of the notch of the metal sleeve framework (161) is provided with a check ring B (19), and the upper part of the notch of the metal sleeve framework (161) is mounted with a sealing ring C (18).

9. The air spring and shock absorber combination shock absorbing device of claim 5, wherein: The top end of the protection cylinder (13) is outwardly turned with a turned edge structure (131).

10. The air spring and shock absorber combination shock absorbing device of claim 1, wherein: The top seat hole top of the top seat (5) is connected with a top cover (2) through a locking screw (1), the top cover (2) completely covers the shock absorber nut (6); the top seat hole of the top seat (5) is provided with a check ring A (3) and a sealing ring A (4) matched with the top cover (2).

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