Two-stage limiting and buffering structure of automotive suspension

Abstract

The utility model discloses a two-stage limiting and buffering structure of an automotive suspension, and belongs to the technical field of automobiles. The limiting and buffering structure solves the problems that in the prior art, a limiting and buffering structure on an automobile suspension is poor in nonlinear gradual change rigidity performance, and a single limiting and buffering block is insufficient in rigidity. The utility model relates to a vehicle-mounted limiting and buffering device, which mainly comprises a first spring seat and a second spring seat, a spring is arranged between the first spring seat and the second spring seat, the first spring seat is connected with a vehicle frame, and the second spring seat is connected with a vehicle axle, the vehicle-mounted limiting and buffering device is characterized by further comprising a primary limiting and buffering assembly and a secondary limiting and buffering assembly, the first-stage limiting and buffering assembly comprises a first limiting and buffering block, the first limiting and buffering block is installed in the spring through a first installation base, the second-stage limiting assembly comprises a second limiting and buffering block, the second limiting and buffering block is installed in the spring through a second installation base, and the first limiting and buffering block and the second limiting and buffering block are oppositely arranged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile, concretely speaking, especially relates to a two-stage limiting and buffering structure of automobile suspension. BACKGROUND

[0002] The limiting and buffering structure can limit the upward jumping position of the suspension under high load impact, avoid excessive vertical displacement of the suspension, prevent the suspension moving parts from colliding with the surrounding parts, and protect the suspension and other parts. The limiting and buffering structure can also mitigate the impact during the upward jumping of the suspension, improve the stiffness of the suspension under large load displacement impact, and make the stiffness of the suspension gradually change, avoiding sudden changes in the stiffness of the suspension and improving the comfort of the vehicle under high load vertical impact.

[0003] The limiting and buffering structure on the automobile suspension generally includes a limiting and buffering block. The reasonable stiffness of the limiting and buffering block is very important for the limiting and buffering structure. The initial stiffness of the limiting and buffering block cannot be too large when it is compressed. Otherwise, when the limiting and buffering block is compressed slightly under medium impact load of the suspension, the stiffness of the suspension will change too much, the vibration isolation and buffering effect will be poor, and the driver will feel poor comfort. When the compression amount of the limiting and buffering block is large, it needs to have high stiffness to play a limiting role and avoid collision between the limiting and buffering block mounting seat and the axle. If the stiffness of the limiting and buffering block is small when the compression amount is large, the limiting and buffering block is easy to be compressed to the limit position. In this way, the limiting and buffering block mounting seat is easy to directly contact with the spring mounting seat below, which will cause the driver to feel a large impact load and a large collision contact noise. Therefore, the limiting and buffering structure on the automobile suspension needs to have strong nonlinear and gradually changing stiffness to meet the performance requirements of the vehicle.

[0004] The current many automobile suspensions on the limiting buffer structure are only a piece of rubber material limiting buffer block, and the limiting buffer block is installed in the coil spring of the suspension through the limiting buffer block mounting seat. For example, the patent with the patent number CN207875315U and the name of suspension buffer limiting device, only one limiting buffer block of rubber material is installed in the coil spring of the suspension to play a limiting buffer role. The limiting buffer structure needs to have reasonable nonlinear gradient stiffness to ensure that the suspension has reasonable nonlinear gradient stiffness. The stiffness cannot change too much when the limiting buffer structure is compressed slightly, and the rate of stiffness rise cannot be too fast when it is compressed greatly. Since the limiting buffer block in the current limiting buffer structure is installed in the coil spring, the volume of the limiting buffer block is often small, which further causes the stiffness of the limiting buffer block to be unable to be controlled in a reasonable nonlinear manner, and further causes the suspension stiffness to be unable to form a very reasonable nonlinear stiffness change. The stiffness of the limiting buffer block is insufficient when the suspension is compressed greatly, and the nonlinear stiffness of the suspension is poor. For example, when the limiting buffer block on the current limiting buffer structure is compressed to the limit position, the stiffness of the limiting buffer block is limited due to the small volume of the limiting buffer block, the nonlinear gradient stiffness is weak, the limiting buffer block mounting seat is prone to "iron-to-iron" state with the mounting seat on the lower side of the spring, and then a sudden impact load is generated, which affects the structural strength of the vehicle. At the same time, the impact load is also transmitted to the cab, causing the driver to feel a large impact and a large impact noise, which affects the comfort of the vehicle. At the same time, the limiting buffer block itself is also prone to premature damage. SUMMARY

[0005] The utility model aims at providing a kind of automobile suspension two-stage limiting buffer structure, to overcome the nonlinear gradient stiffness performance poor and the problem of insufficient stiffness of single limiting buffer block in the limiting buffer structure of prior art on automobile suspension.

[0006] The utility model is implemented by the following technical scheme, a kind of automobile suspension two-stage limiting buffer structure, including first spring seat and second spring seat, the first spring seat and second spring seat between installation have spring, the first spring seat connects frame, second spring seat connects axle, it is characterized by further including primary limiting buffer component and secondary limiting buffer component, the primary limiting buffer component includes first limiting buffer block, first limiting buffer block is installed in spring by first mounting seat, the secondary limiting buffer component includes second limiting buffer block, second limiting buffer block is installed in spring by second mounting seat, the first limiting buffer block and second limiting buffer block are oppositely arranged.

[0007] Further, the stiffness of the first limiting buffer block and the second limiting buffer block is different.

[0008] Further, the first limiting buffer block is on the side of the second limiting buffer block close to the first spring seat, and the rigidity of the first limiting buffer block is less than the rigidity of the second limiting buffer block.

[0009] Further, the first mounting seat and the second mounting seat are made of metal.

[0010] Further, the first mounting seat is provided with a mounting cavity on the side close to the first limiting buffer block, a plurality of limiting holes are arranged in the mounting cavity in the circumferential direction, a clamping claw is arranged in each limiting hole and extends inward, the outer end of the clamping claw is connected with the first mounting seat, and an annular groove is arranged on the side of the first limiting buffer block close to the first mounting seat.

[0011] Further, the bottom of the mounting cavity is provided with a trumpet mouth.

[0012] Further, the first limiting buffer block is made of polyurethane.

[0013] Further, the second limiting buffer block is made of rubber, the second limiting buffer block is vulcanization connected with the second mounting seat, the second mounting seat comprises an upper cover and a bottom plate, and the second limiting buffer block is between the upper cover and the bottom plate.

[0014] Further, the first mounting seat is fixedly connected with the first support through welding, the first support is fixedly connected with the vehicle frame through welding, the bottom plate is fixedly connected with the second support through a bolt and a nut, and the second support is fixedly connected with the axle through welding.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model adopts two-stage limiting buffer structure, through setting first limiting buffer block and second limiting buffer block, and making the rigidity of first limiting buffer block and second limiting buffer block different, when first limiting buffer block and second limiting buffer block are compressed together, the rigidity of first limiting buffer block and second limiting buffer block can be connected in series, when the suspension is subjected to greater load, the nonlinear degree of suspension rigidity increases, the suspension rigidity has reasonable nonlinear change, through adjusting the cooperation between the rigidity of first limiting buffer block and second limiting buffer block, the rigidity curve with good nonlinear degree can be generated, the impact feeling can be reduced, the comfort is improved, compared with the case that the current suspension limiting buffer structure only sets one limiting buffer block, the nonlinear gradually changing rigidity performance of the current suspension limiting buffer structure and the problem of insufficient rigidity of single limiting buffer block can be effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structure schematic diagram of the utility model;

[0018] Figure 2Is the schematic diagram of the utility model when not installing spring;

[0019] Figure 3 Is the sectional view of the utility model;

[0020] Figure 4 Is the schematic diagram of the first limit buffer block of the utility model;

[0021] Figure 5 Is the schematic diagram of the two-stage limit buffer assembly of the utility model.

[0022] In the figure: 1, first spring seat;2, second spring seat;3, spring;4, first limit buffer block;5, first mounting seat;6, second limit buffer block;7, second mounting seat;8, installation cavity;9, limit hole;10, claw;11, annular groove;12, horn mouth;13, upper cover;14, bottom plate;15, first support;16, second support;17, axle. DETAILED DESCRIPTION

[0023] In order to make the personnel in the technical field better understand the technical scheme in the utility model, the technical scheme in the embodiment of the utility model will be described clearly and completely below in combination with the drawings in the embodiment of the utility model. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the utility model.

[0024] A two-stage limit buffer structure of automobile suspension, comprising a first spring seat 1 and a second spring seat 2, a spring 3 is installed between the first spring seat 1 and the second spring seat 2, the spring 3 is a spiral spring, the first spring seat 1 is connected with a vehicle frame, and the second spring seat 2 is connected with an axle 17.

[0025] Further comprising a first limit buffer assembly and a second limit buffer assembly, the first limit buffer assembly comprises a first limit buffer block 4, the first limit buffer block 4 is installed in the spring 3 through a first mounting seat 5, the second limit buffer assembly comprises a second limit buffer block 6, the second limit buffer block 6 is installed in the spring 3 through a second mounting seat 7, and the first limit buffer block 4 and the second limit buffer block 6 are oppositely arranged. In the utility model, the first mounting seat 5 and the second mounting seat 7 are both made of metal material, specifically, the first mounting seat 5 and the second mounting seat 7 can both be made of steel material.

[0026] The first limiting buffer block 4 and the second limiting buffer block 6 are both installed in the spring 3, when the spring 3 on the automobile suspension is compressed to a certain degree, the first limiting buffer block 4 in the spring 3 will contact the second limiting buffer block 6, and the first limiting buffer block 4 and the second limiting buffer block 6 are compressed to play a limiting buffering role. The utility model is equipped with two-stage limiting buffering structure, namely, a first limiting buffering assembly and a second limiting buffering assembly are respectively arranged, the first limiting buffering assembly and the second limiting buffering assembly both respectively include a limiting buffer block, the structure that the current limiting buffering structure on the automobile suspension only has a limiting buffer block is changed, the utility model discloses two limiting buffer blocks are arranged in the spring 3, the rigidity of the limiting buffering structure can be effectively improved, and meanwhile the nonlinear gradually changing rigidity performance of the limiting buffering structure is also improved.

[0027] The rigidity of the first limiting buffer block 4 and the second limiting buffer block 6 is different. The utility model further improves the nonlinear gradually changing rigidity performance of the limiting buffering structure by setting the first limiting buffer block 4 and the second limiting buffer block 6 to different rigidity.

[0028] When the first limiting buffer block 4 is on the side of the second limiting buffer block 6 close to the first spring seat 1, that is, the first limiting buffer block 4 is on the upside of the second limiting buffer block 6, the rigidity of the first limiting buffer block 4 can be greater than that of the second limiting buffer block 6, or the rigidity of the first limiting buffer block 4 can be less than that of the second limiting buffer block 6, in the utility model, the rigidity of the first limiting buffer block 4 on the upside is preferably less than that of the second limiting buffer block 6 on the downside. When the rigidity of the first limiting buffer block 4 on the upside is small, and the rigidity of the second limiting buffer block 6 on the downside is large, the rigidity of the first limiting buffer block 4 changes relatively gently when the first limiting buffer block 4 is compressed slightly, and the vehicle comfort is improved. Since the rigidity of the second limiting buffer block 6 is greater than that of the first limiting buffer block 4, and the second limiting buffer block 6 is arranged opposite to the first limiting buffer block 4, the rigidity of the limiting buffering structure can be effectively improved by the two limiting buffer blocks relative to one limiting buffer block, the suspension rigidity can be reasonably nonlinearly changed under a large impact, the situation that the limiting buffer block mounting seat easily collides with the spring 3 mounting seat on the downside can be avoided due to insufficient rigidity of the limiting buffer block, the gradually changing rigidity performance of the suspension under a large load impact is improved, the purpose of reducing impact force, improving structural reliability, prolonging vehicle service life and improving vehicle comfort is achieved, and the problems of poor nonlinear gradually changing rigidity performance and insufficient rigidity of a single limiting buffer block existing in the current limiting buffering structure of the automobile suspension are well solved.

[0029] The first mounting base 5 is provided with a mounting cavity 8 on the side close to the first limiting buffer block 4, a plurality of limiting holes 9 are arranged in the mounting cavity 8 and are spaced apart in the circumferential direction, a clamping jaw 10 is arranged in each limiting hole 9 and extends inwardly, the outer end of the clamping jaw 10 is connected with the first mounting base 5, an annular groove 11 is arranged on the side of the first limiting buffer block 4 close to the first mounting base 5, and the clamping jaw 10 can be clamped into the annular groove 11. At this time, the material of the first limiting buffer block 4 is polyurethane.

[0030] The mounting cavity 8 and the clamping jaw 10 are arranged, so that the first limiting buffer block 4 can be detachably connected on the first mounting base 5, and the installation and dismounting of the first limiting buffer block 4 are facilitated. When installing, the first limiting buffer block 4 only needs to be pushed into the mounting cavity 8, and the clamping jaw 10 in the limiting hole 9 is clamped into the annular groove 11 of the first limiting buffer block 4, and the two sides of the annular groove 11 are tapered surfaces. When the first limiting buffer block 4 needs to be removed, the position corresponding to the limiting hole 9 of the first limiting buffer block 4 is first pressed downward, and then the first limiting buffer block 4 is pulled downward. The clamping jaw 10 can be formed by bending.

[0031] The bottom of the mounting cavity 8 is provided with a flared opening 12. The flared opening 12 is arranged, so that the first limiting buffer block 4 can be conveniently inserted into the mounting cavity 8.

[0032] The second limiting buffer block 6 is made of rubber material, the second limiting buffer block 6 is vulcanization connected with the second mounting base 7, the second mounting base 7 comprises an upper cover 13 and a bottom plate 14, and the second limiting buffer block 6 is arranged between the upper cover 13 and the bottom plate 14.

[0033] In the utility model, when the first limiting buffer block 4 is made of polyurethane material and the second limiting buffer block 6 is made of rubber material, the rigidity of the first limiting buffer block 4 can be made to be less than that of the second limiting buffer block 6.

[0034] In the utility model, the second limiting buffer block 6 is arranged between the upper cover 13 and the bottom plate 14, so that the second mounting base 7 can protect the second limiting buffer block 6 to a certain extent and prolong the service life of the second limiting buffer block 6.

[0035] The first mounting base 5 is fixedly connected with a first support 15 through welding, the first support 15 is fixedly connected with a vehicle frame through welding, the bottom plate 14 is fixedly connected with a second support 16 through a bolt and a nut, and the second support 16 is fixedly connected with an axle 17 through welding. When the first limiting buffer block 4 is made of polyurethane material and the second limiting buffer block 6 is made of rubber material, the first limiting buffer block 4 is preferably arranged on the upper side of the second limiting buffer block 6, and the rigidity of the first limiting buffer block 4 is less than that of the second limiting buffer block 6. The bottom plate 14 is connected with the second support 16 through a bolt and a nut, so that the second limiting buffer block 6 can be conveniently replaced, and the maintenance convenience is improved.

[0036] The working principle of the utility model:

[0037] When the bridge of the suspension is subjected to a certain vertical impact, the axle 17 moves upward together with the second limiting buffer block 6, the second mounting seat 7, the second support 16, the second spring seat 2 and the second limiting buffer block 6, and the spring 3 is compressed, when moving a certain distance, the cover plate of the second mounting seat 7 will first contact the first limiting buffer block 4, due to the elastic effect of the first limiting buffer block 4 and the second limiting buffer block 6, and the rigidity of the first limiting buffer block 4 is smaller, so the impact force can be reduced, the comfort of the vehicle is improved, and because the rigidity of the second limiting buffer block 6 is much larger than that of the first limiting buffer block 4, the compression amount of the second limiting buffer block 6 is smaller.

[0038] When the vertical impact is further increased, the second limiting buffer block 6 and the first limiting buffer block 4 are continuously compressed, at this time, the second limiting buffer block 6 will be further compressed, due to the compression of the second limiting buffer block 6, the increase amplitude of the suspension rigidity appears nonlinear change, which can further reduce the impact force, improve the comfort of the vehicle, and prevent the limiting buffer block from being compressed to the bottom due to the insufficient rigidity of the limiting buffer block.

[0039] When the first limiting buffer block 4 and the second limiting buffer block 6 are continuously compressed to the limit position due to the large impact load of the suspension, the bottom of the first mounting seat 5 contacts the upper cover 13 of the second mounting seat 7 at this time, and the upper cover 13 of the second mounting seat 7 contacts the second support 16, because the contact between the first mounting seat 5 and the upper cover 13 and the contact between the upper cover 13 and the second support 16 are all metal-to-metal contact, the rigidity is large, which can cope with the case of large load, and can protect the suspension.

Claims

1. A two-stage limiting and buffering structure of an automobile suspension, comprising a first spring seat (1) and a second spring seat (2), a spring (3) being installed between the first spring seat (1) and the second spring seat (2), the first spring seat (1) being connected to a vehicle frame, and the second spring seat (2) being connected to an axle (17), characterized in that, It also includes a primary limit buffer assembly and a secondary limit buffer assembly. The primary limit buffer assembly includes a first limit buffer block (4), which is mounted in the spring (3) via a first mounting base (5). The secondary limit buffer assembly includes a second limit buffer block (6), which is mounted in the spring (3) via a second mounting base (7). The first limit buffer block (4) and the second limit buffer block (6) are arranged opposite to each other.

2. The two-stage limiting and buffering structure of an automobile suspension according to claim 1, characterized in that, The first limiting buffer block (4) and the second limiting buffer block (6) have different stiffnesses.

3. The two-stage limiting and buffering structure of an automobile suspension according to claim 2, characterized in that, The first limiting buffer block (4) is located on the side of the second limiting buffer block (6) close to the first spring seat (1), and the stiffness of the first limiting buffer block (4) is less than that of the second limiting buffer block (6).

4. The two-stage limiting and buffering structure of an automobile suspension according to claim 1, characterized in that, Both the first mounting base (5) and the second mounting base (7) are made of metal.

5. The two-stage limiting and buffering structure of a vehicle suspension according to claim 1, characterized in that, The first mounting base (5) has a mounting cavity (8) on the side near the first limiting buffer block (4). Multiple limiting holes (9) are opened at intervals along the circumferential direction in the mounting cavity (8). The limiting holes (9) are provided with inwardly extending claws (10). The outer end of the claws (10) is connected to the first mounting base (5). The first limiting buffer block (4) has an annular groove (11) on the side near the first mounting base (5). The claws (10) can be inserted into the annular groove (11).

6. The two-stage limiting and cushioning structure for automobile suspension according to claim 5, characterized in that, The bottom of the mounting cavity (8) is provided with a flared opening (12).

7. The two-stage limiting and buffering structure of an automobile suspension according to claim 5, characterized in that, The first limiting buffer block (4) is made of polyurethane.

8. The two-stage limiting and buffering structure of an automobile suspension according to claim 5, characterized in that, The second limiting buffer block (6) is made of rubber. The second limiting buffer block (6) is vulcanized to the second mounting base (7). The second mounting base (7) includes an upper cover (13) and a bottom plate (14). The second limiting buffer block (6) is located between the upper cover (13) and the bottom plate (14).

9. The two-stage limiting and cushioning structure for automobile suspension according to claim 8, characterized in that, The first mounting base (5) is fixedly connected to the first bracket (15) by welding. The first bracket (15) is fixedly connected to the vehicle frame by welding. The base plate (14) is fixedly connected to the second bracket (16) by bolts and nuts. The second bracket (16) is fixedly connected to the axle (17) by welding.

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