CN108909400B - Oil cavity interconnected double-stage vibration isolation balanced suspension - Google Patents

Abstract

The invention belongs to the technical field of automotive suspensions, and particularly relates to a double-stage vibration isolation balanced suspension with interconnected oil cavities, which comprises a frame and two double-stage vibration dampers, wherein the two double-stage vibration dampers are oppositely arranged and are connected with the frame, each double-stage vibration damper comprises a balance swing frame and an oil cylinder, the middle part of the balance swing frame is rotationally connected with the frame, the two ends of the balance swing frame are respectively connected with the frame through the oil cylinders, the two ends of the oil cylinder are respectively hinged with the frame and the balance swing frame, two ends of the balance swing frame are respectively hinged with swing arms, a damper is arranged between each swing arm and each balance swing frame, and the two ends of each damper are respectively hinged with each swing arm and each balance swing frame. The swing arm, the balance swing frame and the structure between the swing arm and the balance swing frame form a first-stage vibration isolation suspension system, the balance swing frame, the frame and the structure between the balance swing frame and the balance swing frame form a second-stage vibration isolation suspension system, the vibration isolation suspension system has lower vibration transmission rate and larger suspension stroke, the ground-tire system vibration can be filtered more fully, and better vibration isolation effects are provided for upper parts such as carriages.

Description

A Two-Stage Vibration Isolation Balanced Suspension with Interconnected Oil Cavities

technical field

The invention belongs to the technical field of automobile suspensions, and in particular relates to a two-stage vibration-isolation balance suspension with interconnected oil chambers.

Background technique

Suspension is the basic guarantee for the comfort, safety and smoothness of the car, and has an important impact on the dynamic quality of the car. Due to the heavy load and complex working conditions of commercial vehicles (especially special commercial vehicles), the suspension system is required to have strong bearing capacity and vibration isolation capacity at the same time. In addition, with the increasingly stringent international environmental protection regulations, new indicators have been put forward for the vibration and noise levels and comfort of commercial vehicles. Therefore, it is necessary to develop a new type of vibration isolation suspension suitable for commercial vehicles.

There are many types of commercial vehicle suspension structures in the prior art. like:

Chinese patent CN201610997987 discloses a balance suspension of a cargo vehicle. In the suspension structure, two ends of a leaf spring assembly are used to connect adjacent axles, causing the leaf spring assembly to bear a large load. Therefore, this type of suspension is generally stiff, and the comfort under small load conditions is poor.

Chinese patent CN20160073560 discloses a multifunctional suspension interconnection system for oil and gas vehicles. The system realizes the interconnection of all oil cylinders on adjacent two axles by connecting the oil cylinders on each wheel of two adjacent axles, ensuring that each wheel has a better Grounding performance, so that the anti-rolling and anti-pitching ability of the suspension is enhanced, but the oil circuit of this system is more complicated. Once a certain oil cylinder is damaged, it will cause the failure of the entire suspension, and the reliability is low.

Chinese patent CN201410130637 discloses a hydraulically interconnected torsion-reducing rear suspension. On the basis of the independent suspension, this suspension adds a pair of interconnected oil cylinders and a balance bar to realize the interconnection of adjacent wheels on the same side. This kind of suspension can take into account comfort and load sharing, but there are many structural load components, and the longitudinal dimension is large, so it is not compact enough.

Chinese patent CN201410818816 discloses the leaf spring cross-type balanced suspension. On the basis of the leaf spring balanced suspension, the leaf springs are cross-installed to save the longitudinal space and make the wheelbase of the rear axle more compact. Some structural fixing devices of the suspension are too low, which greatly affects the passability of the vehicle and is also easy to damage the suspension.

Contents of the invention

In view of the above technical problems, the present invention provides a two-stage vibration isolation balanced suspension with interconnected oil chambers, which has high vibration isolation efficiency, large suspension stroke, good passability, simple structure and high reliability.

The technical scheme adopted in the present invention is:

A double-stage vibration-isolation balance suspension with interconnected oil chambers, including a vehicle frame and a double-stage shock absorber, two double-stage shock absorbers are provided, and the two double-stage shock absorbers are arranged oppositely, and both of them are connected to the vehicle The two-stage shock absorber includes a balance pendulum and an oil cylinder, the middle part of the balance pendulum is connected to the frame in rotation, the two ends of the balance pendulum are respectively connected to the vehicle frame through the oil cylinder, and the two ends of the oil cylinder are respectively connected to the vehicle It is hinged with the balance pendulum frame, and the two ends of the balance pendulum frame are respectively hinged with a swing arm, and a damper is arranged between the swing arm and the balance pendulum frame, and the two ends of the damper are respectively hinged with the swing arm and the balance pendulum frame.

It also includes a stabilizing shaft, the stabilizing shaft is arranged on the vehicle frame, the middle part of the balance pendulum is rotationally connected with the vehicle frame through the stabilizing shaft, and the middle part of the balance pendulum is rotationally coupled with one end of the stabilizing shaft.

A connecting plate is arranged on the stabilizing shaft, and the stabilizing shaft is connected with the vehicle frame through the connecting plate.

A bearing assembly is provided at the rotating joint between the balance pendulum frame and the stabilizing shaft.

The bearing assembly includes a sealing disc 1, a roller bearing and a top disc arranged on the stable shaft in sequence from the inside to the outside. There are two roller bearings, and a bearing positioning ring is arranged between the two roller bearings. The end of the stabilizing shaft is connected with the top plate through threads.

The two oil cylinders are communicated through an oil pipe, and a damping valve is arranged on the oil pipe.

The balance swing frame is provided with a damping valve mounting frame and a connecting oil pipe bracket.

The swing arm is hinged to the balance swing frame through the swing arm bracket, one end of the swing arm bracket is fixedly connected to the balance swing frame, and the other end is hinged to the swing arm.

The swing arm bracket is provided with a support plate, and the support plate is provided with a connection hole connected with the balance pendulum frame.

The damper adopts a coil spring damper.

Compared with the prior art, the present invention has the beneficial effects of:

The swing arm and the balance pendulum and the structure between them constitute the first-level vibration isolation suspension system, and the balance pendulum and the frame and the structure between the two constitute the second-level vibration isolation suspension system, thus forming a double-level vibration isolation system. system. It has a low vibration transmission rate and a large suspension stroke, which can more fully filter the vibration of the ground-tire system, provide better vibration isolation effect on the body parts such as the car, and have good passability.

At the same time, it has multi-stiffness-variable damping characteristics, and can adapt to a wider range of loads. The first-stage vibration isolation system has low stiffness and large damping characteristics, and plays a major role in no-load or light-load conditions. The independence of the two wheels on the same side is high, which can improve the comfort and grip of the suspension; the second-stage The vibration isolation system has the characteristics of large stiffness and variable damping, and it works under heavy load or abrupt road conditions. At the same time, it compensates for the convection of the oil cylinder, produces variable damping energy consumption, reduces the independence of the two wheels, and balances the axle load.

The invention has the advantages of light weight, simple structure and oil circuit, strong reliability, high vibration isolation efficiency and large suspension stroke, and is suitable for precision instrument transport vehicles and commercial vehicles with strong off-road requirements.

Description of drawings

Fig. 1 is the overall structural representation of the present invention;

Fig. 2 is a schematic structural view of the stabilizing shaft of the present invention;

Fig. 3 is the structural representation of oil cylinder of the present invention;

Fig. 4 is a structural schematic diagram 1 of the balance swing frame of the present invention;

Fig. 5 is a structural schematic diagram II of the balance pendulum of the present invention;

Fig. 6 is a schematic structural view of the bearing assembly of the present invention;

Fig. 7 is a schematic diagram of the structure of the swing arm of the present invention;

Fig. 8 is a schematic structural diagram of the swing arm bracket of the present invention;

Fig. 9 is a schematic diagram of the second structure of the bearing assembly of the present invention;

Fig. 10 is a schematic diagram of the oil circuit connection of the oil cylinder of the present invention;

Fig. 11 is a structural schematic diagram of the damping valve mounting frame of the present invention;

Among them: 1 is the frame, 2 is the balance pendulum, 3 is the oil cylinder, 4 is the swing arm, 5 is the damper, 6 is the stabilizing shaft, 7 is the connecting plate, 8 is the sealing plate 1, 9 is the roller bearing, 10 is the top plate, 11 is the bearing positioning ring, 12 is the oil pipe, 13 is the damping valve, 14 is the damping valve installation frame, 15 is the bracket connecting the oil pipe, 16 is the swing arm bracket, 17 is the support plate, 18 is the wheel connecting shaft, 19 20 is a bearing outer end cover, 21 is a bearing inner end cover, and 22 is a connecting shaft.

Detailed ways

The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figure 1, a two-stage vibration isolation balance suspension with interconnected oil chambers includes a vehicle frame 1 and a two-stage shock absorber. There are two two-stage shock absorbers, and the two two-stage shock absorbers are arranged oppositely. , and are connected with the longitudinal beam of vehicle frame 1. The two-stage shock absorber includes a balance pendulum 2, the middle part of the balance pendulum 2 is rotationally connected (hinged) with the vehicle frame 1, the two ends of the balance pendulum 2 are respectively connected with the vehicle frame 1 through the oil cylinder 3, and the two ends of the oil cylinder 3 are connected with the vehicle frame 1 respectively. Frame 1 and balance pendulum 2 are hinged. The balance swing frame 2, the vehicle frame 1 and the two oil cylinders 3 constitute a second-stage vibration-isolation suspension system.

As shown in Figure 7 and Figure 1, the two ends of the balance pendulum 2 are respectively hinged with a swing arm 4, and a damper 5 is arranged between the swing arm 4 and the balance pendulum 2, and the two ends of the damper 5 are respectively connected to the swing arm 4 and the balance pendulum 2. The balance pendulum 2 is hinged, and the balance pendulum 2, two swing arms 4 and two dampers 5 constitute a first-stage vibration-isolation suspension system. One end of the swing arm 4 is hinged with the balance pendulum 2, and the other end of the swing arm 4 is rotationally connected with the wheel. Specifically, it can be realized by setting a wheel connecting shaft 18 thereon, and the wheel is rotationally coupled with the wheel connecting shaft 18 . As mentioned above, the two oil cylinders 3 are located on the upper surface of the balance pendulum 2 , and the two swing arms 4 and the two dampers 5 are located on the lower surface of the balance pendulum 2 .

As shown in Figures 3 and 10, the oil cylinder 3 is filled with hydraulic damping oil, and the oil cylinder 3 located at the left and right ends of the balance pendulum 2 is connected through a hose (oil pipe 12), and a damping valve 13 is connected to the hose. The damping valve 13 is used to control the communication damping between the two oil cylinders 3 . When the balance pendulum 2 rotates, the oil cylinders 3 on both sides are respectively compressed or stretched, and the damping fluid in the oil cylinders 3 in the compressed state enters into the oil cylinder 3 in the extended state through the hose and the damping valve 13 .

As shown in FIGS. 4 and 11 , the damping valve 13 can be installed in the damping valve installation frame 14 provided on the upper side of the balance pendulum 2 , and the balance pendulum 2 is provided with a connecting oil pipe bracket 15 for fixing the hose. The damping valve 13 has variable damping characteristics, and the damping valve 13 has a large damping force when the load is small, and the degree of interconnection of the oil cylinders 3 on both sides is very low, ensuring that the second-stage vibration-isolation suspension system has a relatively large overall rigidity and Support performance; under the condition of large eccentric load, there is a small damping force, and the degree of interconnection between the two oil cylinders 3 is relatively high to achieve compensation. The stiffness of the second-stage vibration isolation suspension system becomes smaller and the stroke becomes larger. On the one hand, large eccentric loads are realized The lower two wheels are independent, and the damping dissipation effect of the compensation cylinder 3 can also be activated to increase the vibration suppression capability.

The damping valve 13 can adopt the structure in the prior art, and the damping valve mounting frame 14 can adopt the structure shown in Figure 11, or can be adjusted according to the specific structure of the damping valve 13. Just play a fixed role. The connecting tubing support 15 can be realized by using a common bushing, the side wall of the bushing is fixed on the balance pendulum 2, and the hose can pass through the bushing.

working principle:

Under low load conditions, the first-stage vibration-isolation suspension system has small stiffness and large damping characteristics, large suspension travel, high vibration dissipation capacity, and the vibration force transmitted to the second-stage vibration-isolation suspension system is small. Due to the independent setting of the two swing arms 4, the independence of the two wheels is good, and the gripping ability and comfort of the suspension are good; the damping valve 13 of the second-stage vibration isolation suspension system has a large damping effect, and the left and right oil cylinders 3 The convective resistance of the damping fluid is large, resulting in the rigidity of the second-stage vibration isolation suspension system, the suspension stroke is small, the support strength is high, and the stability and passability are good.

Under heavy load conditions, the first-stage vibration-isolation suspension system exhibits large stiffness and large damping characteristics due to large deformation, and the vibration force transmitted to the second-stage vibration-isolation suspension system is relatively large; at this time, the second-stage vibration-isolation suspension system The damping force of the damping valve 13 of the suspension system decreases, and the damping fluid of the left and right cylinders 3 convects, that is, the damping fluid of the compression cylinder 3 enters the stretching cylinder 3 through the connecting hose and the damping valve 13. The load is balanced between the two wheels. On the other hand, the damping fluid passes through the damping valve 13 to generate a large damping and dissipation effect, thereby realizing secondary vibration isolation.

As shown in FIGS. 2 and 4 , the balance pendulum 2 in the two double-stage shock absorbers can be directly connected to the vehicle frame 1 in rotation, and of course it can also be realized through the stabilizing shaft 6 . Through the stabilizing shaft 6, while realizing the connection, it can play a lateral stabilizing effect. The specific connection is as follows: the stabilizing shaft 6 is arranged on the vehicle frame 1, and the two ends of the stabilizing shaft 6 are respectively connected to the two balance pendulum frames 2 in rotation, and the middle part of the balance pendulum frame 2 is provided with a corresponding central hole 19.

In order to facilitate the connection, a connecting plate 7 can be provided on the stabilizing shaft 6 , and the stabilizing shaft 6 can be connected with the vehicle frame 1 through the connecting plate 7 . Two or more connecting plates 7 can be provided, and the connecting plates 7 are connected with the vehicle frame 1 through bolts, and the connecting plates 7 are provided with corresponding bolt holes. The specific position of the connecting plate 7 can be adjusted according to actual conditions.

As shown in FIG. 6 , in order to reduce friction, a bearing assembly may be provided at the place where the balance pendulum 2 is rotationally coupled with the stabilizing shaft 6 (the center hole 19 ). The bearing assembly can adopt the structure in the prior art, or can adopt:

The bearing assembly includes a sealing disc-8, a roller bearing 9 and a top disc 10 (which can also be replaced by a suitable type of circlip) which are sequentially arranged on the stable shaft 6 from the inside to the outside, and there are two roller bearings 9. A bearing locating ring 11 is arranged between the two roller bearings 9 to position the bearings and ensure that the bearings and lubricating grease have sufficient space for movement and storage. The end of the stabilizing shaft 6 is connected with the top plate 10 through threads, the end of the stabilizing shaft 6 is provided with external threads, and the top plate 10 is provided with internal threads. The roller bearing 9 can adopt a tapered roller bearing.

The balance pendulum 2 is connected to the stabilizing shaft 6 through the tapered roller bearing 9 at the center hole, the inner ring of the bearing is connected to the stabilizing shaft 6, and the outer ring of the bearing is connected to the center hole of the balance pendulum 2; The top plate 10 is used to fix and seal the bearing (here, a suitable type of circlip can also be used to elastically position the bearing, and an appropriate sealing mechanism is designed at the outer end cover 20 of the bearing to seal the connection), and the sealing plate provided on the inner side - 8 is used for sealing (this sealing disc can also be removed here, and a suitable sealing ring is added at the bearing inner end cover 21); the two ends of the connection are provided with bearing end covers (including bearing outer end cover 20 and bearing inner end cover 21 ), the bearing outer end cover 20 can be connected with the balance pendulum frame 2 through connecting screws, and the balance pendulum frame 2 is provided with corresponding end cover threaded holes.

As shown in Figures 8 and 9, the swing arm 4 can be directly hinged with the balance swing frame 2, or can be hinged with the balance swing frame 2 through the swing arm bracket 16, and one end of the swing arm bracket 16 is fixedly connected with the balance swing frame 2, and the swing arm The other end of the bracket 16 is hinged to the swing arm 4 . Setting the swing arm bracket 16 can increase the angle between the swing arm 4 and the balance swing frame 2, that is, the swing range can be increased.

The swing arm 4 can be articulated with the swing arm bracket 16 through the connecting shaft 22, the connecting shaft 22 is provided with a bearing assembly 2, and the friction force is reduced by the bearing assembly 2, which specifically includes a pair of cylinders installed in the coupling holes of the swing arm bracket 16 For the roller bearings, two sealing discs are arranged on the outer sides of the two cylindrical roller bearings. The inner ring of the cylindrical roller bearing is connected with the connecting shaft 22, and the outer ring is connected with the 16 coupling holes of the swing arm bracket. The swing arm 4 can be connected with both ends of the connecting shaft 22 by using a connecting hoop.

As shown in Figure 5, the swing arm bracket 16 can be directly welded on the balance pendulum frame 2, or can be connected with the balance pendulum frame 2 by screws, and a support plate 17 is provided on it. The through hole that frame 2 is connected, and the balance pendulum frame 2 is provided with corresponding connection hole. The damper 5 can adopt a common structure in the prior art, preferably a coil spring damper. The present invention is applicable to the non-driven parallel shafts of commercial vehicles, such as parallel double shafts and the like.

Only the preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above-mentioned embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various modifications can also be made without departing from the gist of the present invention. Various changes should be included within the protection scope of the present invention.

Claims (10)

1. A two-stage vibration-isolation balance suspension with interconnected oil chambers, characterized in that it includes a vehicle frame (1) and a two-stage shock absorber, and the two-stage shock absorber is provided with two, two double-stage shock absorbers The vibrators are set opposite to each other and are connected to the frame (1). The two-stage shock absorber includes a balance pendulum (2) and an oil cylinder (3). The middle part of the balance pendulum (2) is connected to the The two ends of the balance swing frame (2) are respectively connected with the frame (1) through the oil cylinder (3), and the two ends of the oil cylinder (3) are respectively hinged with the frame (1) and the balance swing frame (2). A swing arm (4) is hinged at both ends of the balance pendulum (2), and a damper (5) is provided between the swing arm (4) and the balance pendulum (2), and the two ends of the damper (5) are respectively It is hinged with the swing arm (4) and the balance swing frame (2). 2. A two-stage vibration-isolation balance suspension with interconnected oil chambers according to claim 1, characterized in that it also includes a stabilizing shaft (6), and the stabilizing shaft (6) is arranged on the vehicle frame (1) , the middle part of the balance pendulum (2) is rotatably connected with the vehicle frame (1) through the stabilizing shaft (6), and the middle part of the balance pendulum (2) is rotatably connected with one end of the stabilizing shaft (6). 3. A two-stage vibration-isolation balance suspension with interconnected oil chambers according to claim 2, characterized in that: a connecting plate (7) is provided on the stabilizing shaft (6), and the stabilizing shaft (6) passes through the connecting plate ( 7) Connect with the frame (1). 4. The double-stage vibration-isolation balance suspension with interconnected oil chambers according to claim 2, characterized in that: a bearing assembly is provided at the rotational connection between the balance pendulum (2) and the stabilizing shaft (6). 5. A two-stage vibration-isolation balance suspension with interconnected oil chambers according to claim 4, characterized in that: said bearing assembly includes sealing discs ( 8), the roller bearing (9) and the top plate (10), there are two roller bearings (9), and a bearing positioning ring (11) is arranged between the two roller bearings (9), and the stable The end of the shaft (6) is connected with the top plate (10) by threads. 6. A two-stage vibration-isolation balance suspension with interconnected oil chambers according to claim 1, characterized in that: the two oil cylinders (3) are connected through oil pipes (12), and the oil pipes (12) are provided with Damping valve (13). 7. A two-stage vibration-isolation balance suspension with interconnected oil chambers according to claim 6, characterized in that: the balance pendulum (2) is provided with a damping valve mounting frame (14) and a connecting oil pipe bracket ( 15). 8. The double-stage vibration-isolation balance suspension with interconnected oil chambers according to claim 1, characterized in that: the swing arm (4) is hinged to the balance swing frame (2) through the swing arm bracket (16), One end of the swing arm bracket (16) is fixedly connected to the balance swing frame (2), and the other end is hinged to the swing arm (4). 9. A two-stage vibration-isolation balance suspension with interconnected oil chambers according to claim 8, characterized in that: the swing arm support (16) is provided with a support plate (17), and the support plate (17 ) is provided with a connection hole connected with the balance pendulum (2). 10. The two-stage vibration-isolation balance suspension with interconnected oil chambers according to claim 1, characterized in that: the damper (5) is a coil spring damper.