Air suspension system and vehicle

Abstract

The present invention discloses an air suspension system and a vehicle, wherein the air suspension system includes a vehicle frame, two guide supports, two air springs, two leaf springs, a vehicle axle and two thrust rods, one end of each leaf spring is rotatably mounted on the lower end of the corresponding guide support along a transversely extending axis, and the other end is connected to the lower end of the corresponding air spring, the vehicle axle extends transversely and is arranged below two longitudinal beams, both ends of the vehicle axle can be rotatably mounted on the middle position of the corresponding leaf spring along the transversely extending axis, the two thrust rods are arranged at an angle, one end of the two thrust rods are rotatably mounted on the upper end of the middle part of the vehicle axle along the transversely extending axis, and the other ends are extended in the direction away from the air spring, and are respectively rotatably mounted on the opposite inner ends of the two longitudinal beams along the transversely extending axis. The technical solution of the present invention effectively solves the problem of high component failure rate caused by a single lateral force transmission path, and improves the service life of each component of the air suspension system.

Description

Technical Field

[0001] The invention relates to the technical field of air suspension, and in particular to an air suspension system and a vehicle. Background Art

[0002] In the composite rear air suspension system of commercial vehicles, the leaf spring as a guide and load-bearing element needs to be used in conjunction with the lateral thrust rod, where the front end of the guide leaf spring is fixedly connected to the guide arm support, and the rear section is fixedly connected to the lower support of the airbag, mainly transmitting the forces in the up and down and front and back directions, and the lateral thrust rod mainly transmits the lateral force. However, due to the structural characteristics of the system, the structure is applied to heavy-duty trucks, especially single-rear-axle trucks. Under certain working conditions such as steering or uneven roads, the lateral force transmitted to the axle through the lateral thrust rod is amplified due to the single transmission path, resulting in a high failure rate of components at both ends of the lateral thrust rod. Summary of the invention

[0003] The main purpose of the present invention is to provide an air suspension system, aiming to solve the problem of high failure rate of components at both ends of the existing lateral thrust rod.

[0004] To achieve the above object, the air suspension system proposed by the present invention comprises:

[0005] The vehicle frame includes two longitudinal beams which are arranged with a relative spacing in a transverse direction;

[0006] Two guide supports, upper ends of which are respectively connected to the side ends of the two longitudinal beams which are away from each other in the transverse direction;

[0007] Two air springs are respectively arranged at the lower sides of the two longitudinal beams;

[0008] Two leaf springs are arranged to extend in the longitudinal direction, one end of each leaf spring is rotatably mounted on the lower end of the corresponding guide support along an axis extending in the transverse direction, and the other end is connected to the lower end of the corresponding air spring;

[0009] an axle extending transversely and disposed below the two longitudinal beams, wherein both ends of the axle can be rotatably mounted along the transversely extending axis at the middle position of the corresponding leaf spring; and

[0010] The two thrust rods are arranged at an angle, and one end of the two thrust rods is rotatably installed along the transversely extending axis at the upper end of the middle part of the axle, and the other end of the two thrust rods extends in the direction away from the air spring, and is rotatably installed along the transversely extending axis at the opposite inner ends of the two longitudinal beams.

[0011] Optionally, the air suspension system further includes:

[0012] Two lower supports, mounted at both ends of the axle; and,

[0013] Two upper supports are provided on the leaf spring and are arranged corresponding to the lower supports;

[0014] Wherein, each of the lower supports and one of the corresponding upper supports are provided with a transversely penetrating axial hole, and the other is provided with a transversely extending rotating shaft, and the axial hole is cooperatively connected with the rotating shaft.

[0015] Optionally, each of the lower supports is provided with a groove which opens downward and passes through laterally, the groove is engaged with the axle, and the upper side of the lower support is provided with the rotating shaft;

[0016] The upper support comprises:

[0017] A backing plate is horizontally arranged at the lower side of the leaf spring, the backing plate is provided with a screw hole penetrating from top to bottom, a convex portion is protruding from the lower side of the backing plate, and the convex portion is provided with the shaft hole; and,

[0018] A U-shaped bolt passes through the screw hole and cooperates with the backing plate to clamp the leaf spring.

[0019] Optionally, two lateral ends of the lower support are provided with fixing holes extending vertically;

[0020] Matching holes are provided at both lateral ends of the rotating shaft corresponding to the fixing holes;

[0021] The rotating shaft passes through the fixing hole and the matching hole through a connecting piece so as to be fixed to the lower support.

[0022] Optionally, bosses are provided at two lateral ends of the lower support and are arranged toward the upper support, and the fixing holes are provided on the bosses.

[0023] Optionally, an escape groove is provided on the upper side surface of the lower support to escape the upper support rotatably connected to the rotating shaft.

[0024] Optionally, a protective pad is provided on the upper side of the leaf spring, and the protective pad is provided with a clamping slot. The U-shaped bolt includes two screw arms and a bent connecting portion connecting the two screw arms, and the bent connecting portion is clamped in the clamping slot.

[0025] Optionally, the air suspension system further includes two shock absorbers, which extend vertically and are disposed on the lower sides of the two longitudinal beams, and the lower end of each shock absorber is connected to an end of the corresponding leaf spring away from the guide support.

[0026] Optionally, each longitudinal beam is provided with a plurality of transversely penetrating mounting holes, and the upper end portion of each guide support and the corresponding thrust rod are mounted in the same mounting hole and are respectively located at opposite side ends of the longitudinal beam in the transverse direction.

[0027] The present invention further provides a vehicle, comprising an air suspension system, wherein the air suspension system comprises:

[0028] The vehicle frame includes two longitudinal beams which are arranged with a relative spacing in a transverse direction;

[0029] Two guide supports, upper ends of which are respectively connected to the side ends of the two longitudinal beams which are away from each other in the transverse direction;

[0030] Two air springs are respectively arranged at the lower sides of the two longitudinal beams;

[0031] Two leaf springs are arranged to extend in the longitudinal direction, one end of each leaf spring is rotatably mounted on the lower end of the corresponding guide support along an axis extending in the transverse direction, and the other end is connected to the lower end of the corresponding air spring;

[0032] A vehicle axle, extending transversely and disposed below the two longitudinal beams, both ends of the vehicle axle being rotatably mounted along the transversely extending axis to the middle position of the corresponding leaf spring; and,

[0033] The two thrust rods are arranged at an angle, and one end of the two thrust rods is rotatably installed along the transversely extending axis at the upper end of the middle part of the axle, and the other end of the two thrust rods extends in the direction away from the air spring, and is rotatably installed along the transversely extending axis at the opposite inner ends of the two longitudinal beams.

[0034] In the technical solution of the present invention, both ends of the axle can be rotatably installed along the transversely extending axis and are corresponding to the middle position of the leaf spring. The leaf spring and the axle can rotate relative to each other at a certain angle. The two thrust rods are arranged at an angle, and one end is rotatably installed along the transversely extending axis and is installed at the upper end of the middle part of the axle, and the other end is rotatably installed along the transversely extending axis and is correspondingly installed at the opposite inner ends of the two longitudinal beams. The movement trajectory of the two thrust rods after being connected to the axle will not cause movement interference problems. The transmission of lateral force can be transmitted by the two thrust rods, which effectively solves the problem of high component failure rate caused by the single lateral force transmission path, and improves the service life of each component of the air suspension system. The air suspension system is also suitable for heavy-duty trucks and has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0036] Figure 1It is a structural schematic diagram of an embodiment of an air suspension system of the present invention;

[0037] Figure 2 for Figure 1 Schematic diagram of the assembly structure of the upper support and the lower support;

[0038] Figure 3 for Figure 1 Structural diagram of the middle and lower support;

[0039] Figure 4 for Figure 1 Structural schematic diagram of the middle and upper support;

[0040] Figure 5 for Figure 1 A partial enlarged view of point A in the middle.

[0041] Description of Figure Numbers:

[0042] Label name Label name 100 Air suspension system 73 Fixing holes 1 Frame 74 Matching hole 11 Stringer 75 Boss 111 Mounting holes 76 Avoidance groove 2 Guide support 8 upper support 3 Air Springs 81 Shaft hole 4 Leaf Spring 82 Pad 41 Pads 821 Screw hole 411 Card slot 822 convex part 5 Axles 822a Reinforcement 6 Thrust rod 83 U-bolt 7 Lower support 831 Screw arm 71 Shaft 832 Bending connection 72 Grooves 9 Shock absorbers

[0043] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0046] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0047] In the composite rear air suspension system of commercial vehicles, the leaf spring as a guide and load-bearing element needs to be used in conjunction with the lateral thrust rod, where the front end of the guide leaf spring is fixedly connected to the guide arm support, and the rear section is fixedly connected to the lower support of the airbag, mainly transmitting the forces in the up and down and front and back directions, and the lateral thrust rod mainly transmits the lateral force. However, due to the structural characteristics of the system, the structure is applied to heavy-duty trucks, especially single-rear-axle trucks. Under certain working conditions such as steering or uneven roads, the lateral force transmitted to the axle through the lateral thrust rod is amplified due to the single transmission path, resulting in a high failure rate of components at both ends of the lateral thrust rod.

[0048] In view of this, the present invention proposes an air suspension system. Figures 1 to 5 An embodiment of the air suspension system provided by the present invention, in which the leaf spring and the axle can rotate relative to each other at a certain angle, can improve the related problems caused by the single transmission path of the lateral force through the V-type thrust rod, and can effectively solve the problem of high failure rate of components at both ends of the existing lateral thrust rod. The air suspension system will be described below in conjunction with specific drawings.

[0049] Reference Figures 1 to 5 The air suspension system 100 includes a vehicle frame 1, two guide supports 2, two air springs 3, two leaf springs 4, axles 5 and two thrust rods 6. The vehicle frame 1 includes two longitudinal beams 11 that are arranged with a relative spacing in the transverse direction. The upper ends of the two guide supports 2 are respectively connected to the side ends of the two longitudinal beams 11 that are separated from each other in the transverse direction. The two air springs 3 are arranged on the lower sides of the two longitudinal beams 11. The two leaf springs 4 are arranged to extend in the longitudinal direction. One end of each leaf spring 4 is rotatably mounted on the lower end of the corresponding guide support 2 along the axis extending in the transverse direction. , the other end is connected to the lower end of the corresponding air spring 3, the axle 5 extends laterally and is arranged below the two longitudinal beams 11, both ends of the axle 5 can be rotatably installed along the laterally extending axis at the middle position of the corresponding leaf spring 4, the two thrust rods 6 are arranged at an angle, one end of the two thrust rods 6 are rotatably installed along the laterally extending axis at the upper end of the middle part of the axle 5, and the other ends extend in the direction away from the air spring 3, and are respectively rotatably installed along the laterally extending axis at the opposite inner ends of the two longitudinal beams 11.

[0050] In the technical solution of the present invention, both ends of the axle 5 can be rotatably installed along the transversely extending axis at the middle position of the corresponding leaf spring 4, and the leaf spring 4 and the axle 5 can rotate relative to each other at a certain angle. The two thrust rods 6 are arranged at an angle, and one end is rotatably installed along the transversely extending axis at the upper end of the middle part of the axle 5, and the other end is rotatably installed along the transversely extending axis at the opposite inner ends of the two longitudinal beams 11. The movement trajectory of the two thrust rods 6 after being connected to the axle 5 will not cause movement interference problems. The transmission of lateral force can be transmitted by the two thrust rods 6, which effectively solves the problem of high component failure rate caused by the single lateral force transmission path, and improves the service life of each component of the air suspension system 100. The air suspension system 100 is also suitable for heavy-duty trucks and has high reliability.

[0051] In order to allow the axle 5 and the leaf spring 4 to rotate relative to each other, the air suspension system 100 also includes two lower supports 7 and two upper supports 8. The two lower supports 7 are installed at both ends of the axle 5, and the two upper supports 8 are provided on the leaf spring 4 and are arranged corresponding to each of the lower supports 7. Each of the lower supports 7 and the corresponding upper supports 8 is provided with a transversely penetrating shaft hole 81, and the other is provided with a transversely extending rotating shaft 71. The shaft hole 81 is matched and connected with the rotating shaft 71. The specific positions of the shaft hole 81 and the rotating shaft 71 are not limited. In one embodiment, the rotating shaft 71 is provided on the upper support 8, and the shaft hole 81 is provided on the lower support 7. In this embodiment, the rotating shaft 71 is provided on the lower support 7, and the shaft hole 81 is provided on the upper support 8. For specific arrangements, please refer to Figure 3 Each of the lower supports 7 is provided with a groove 72 that opens downward and passes through laterally. The groove 72 is engaged with the axle 5. The specific engagement between the groove 72 and the axle 5 is not limited. In one embodiment, it can be fixed by screws. In this embodiment, it is directly welded to the axle 5 at the groove 72. The groove 72 increases the welding area and ensures the reliability of the connection. The upper side of the lower support 7 is provided with the rotating shaft 71. The upper support 8 includes a pad 82 and a U-bolt 83. The pad 82 is horizontally arranged on the lower side of the leaf spring 4. The pad 82 is provided with a screw hole 821 that passes through from top to bottom. The lower side of the pad 82 is provided with a convex portion 822, and the convex portion 822 is provided with the shaft hole 81. The U-bolt 83 passes through the screw hole 821 and cooperates with the pad 82 to clamp the leaf spring 4. The air suspension system 100 eliminates the lower axle support of the traditional composite air suspension, and reduces the height distance between the axle 5 and the suspension connection structure through the U-bolt 83, thereby reducing the weight and cost of the components of the air suspension system 100.

[0052] Furthermore, a reinforcing rib 822a is provided on the side of the protrusion 822, and the reinforcing rib 822a extends obliquely from the side of the protrusion 822 toward the side of the pad 82, thereby improving the structural strength without affecting the rotation of the protrusion 822 relative to the shaft 71, thereby avoiding interference.

[0053] Please continue reading Figure 2 and Figure 3 The lower support 7 is provided with vertically extending fixing holes 73 at both lateral ends, and the rotating shaft 71 is provided with matching holes 74 at both lateral ends corresponding to the fixing holes 73. The rotating shaft 71 is fixed to the lower support 7 by passing through the fixing holes 73 and the matching holes 74 through a connecting member. The connecting member is not limited to a specific one. In the present embodiment, the connecting member includes a bolt to connect the rotating shaft 71 and the lower support 7.

[0054] In order to ensure the relative rotation between the upper support 8 and the lower support 7 and avoid interference between the components, the lower support 7 is provided with bosses 75 at both ends thereof and arranged toward the upper support 8, and the fixing hole 73 is arranged on the bosses 75. The distance between the rotating shaft 71 and the lower support 7 is raised to form an avoidance space to avoid the lower part of the upper support 8 from rotating.

[0055] Similarly, an escape groove 76 is provided on the upper side surface of the lower support 7 to escape the upper support 8 rotatably connected to the rotating shaft 71 .

[0056] It should be noted that the boss 75 and the avoidance groove 76 can be provided either alone or at the same time. Obviously, the technical effect brought by their simultaneous existence is the best.

[0057] In order to ensure the connection reliability between the upper support 8 and the leaf spring 4, the U-shaped bolt 83 passes through the screw hole 821 and cooperates with the pad 82 to clamp the leaf spring 4. When the U-shaped bolt 83 and the pad 82 clamp the leaf spring 4, the U-shaped bolt 83 may wear the leaf spring 4 due to force transmission and vibration. In this embodiment, a protective pad 41 is provided on the upper side of the leaf spring 4, and the protective pad 41 is provided with a clamping groove 411. The U-shaped bolt 83 includes two screw arms 831 and a bent connection part 832 connecting the two screw arms 831, and the bent connection part 832 is clamped in the clamping groove 411. It has a limiting and buffering effect on the leaf spring 4, and while strengthening the fixing reliability, it protects the leaf spring 4 and the U-shaped bolt 83 from relative movement and wear.

[0058] When the car is running, the frame 1 and the body vibrate due to movement. In order to improve the driving smoothness of the car, the air suspension system 100 also includes two shock absorbers 9. The two shock absorbers 9 extend vertically and are arranged on the lower sides of the two longitudinal beams 11. The lower end of each shock absorber 9 is connected to the end of the corresponding leaf spring 4 away from the guide support 2.

[0059] In order to further improve the lateral force transmission path, each longitudinal beam 11 is provided with a plurality of transversely penetrating mounting holes 111, and the upper end portion of each guide support 2 and the corresponding thrust rod 6 are installed in the same mounting hole 111, and are respectively located at the opposite side ends of the longitudinal beam 11 in the transverse direction. The lateral force can be transmitted by the two thrust rods 6, and since each guide support 2 and each thrust rod 6 share the same mounting hole 111, the lateral force transmission path is optimized, and there will be no interference due to the motion trajectory, thereby improving the reliability of the air suspension system 100 and reducing the maintenance cost.

[0060] The present invention further provides a vehicle, the vehicle comprising an air suspension system 100, the specific structure of the air suspension system 100 is referred to the above embodiments, and since the vehicle adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0061] It should be noted that, in the present invention, the specific structure of the vehicle is not limited. Specifically, the vehicle may be a heavy-duty truck.

[0062] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An air suspension system, characterized in that: include: The vehicle frame includes two longitudinal beams which are arranged with a relative spacing in a transverse direction; Two guide supports, upper ends of which are respectively connected to the side ends of the two longitudinal beams which are away from each other in the transverse direction; Two air springs are respectively arranged at the lower sides of the two longitudinal beams; Two leaf springs are arranged to extend in the longitudinal direction, one end of each leaf spring is rotatably mounted on the lower end of the corresponding guide support along an axis extending in the transverse direction, and the other end is connected to the lower end of the corresponding air spring; an axle extending transversely and disposed below the two longitudinal beams, wherein both ends of the axle can be rotatably mounted along the transversely extending axis at the middle position of the corresponding leaf spring; and Two thrust rods are arranged at an angle, one end of each of the two thrust rods is rotatably mounted on the upper end of the middle part of the axle along a transversely extending axis, and the other end of each of the two thrust rods extends in a direction away from the air spring and is rotatably mounted on the opposite inner ends of the two longitudinal beams along a transversely extending axis; The air suspension system further comprises: Two lower supports, mounted at both ends of the axle; and, Two upper supports are provided on the leaf spring and are arranged corresponding to the lower supports; Wherein, each of the lower supports and one of the corresponding upper supports are provided with a transversely penetrating axial hole, and the other is provided with a transversely extending rotating shaft, and the axial hole is cooperatively connected with the rotating shaft.

2. The air suspension system according to claim 1, characterized in that: Each of the lower supports is provided with a groove which opens downward and passes through laterally, the groove is clamped with the axle, and the upper side of the lower support is provided with the rotating shaft; The upper support comprises: A backing plate is horizontally arranged at the lower side of the leaf spring, the backing plate is provided with a screw hole penetrating from top to bottom, a convex portion is protruding from the lower side of the backing plate, and the convex portion is provided with the shaft hole; and, A U-shaped bolt passes through the screw hole and cooperates with the backing plate to clamp the leaf spring.

3. The air suspension system according to claim 2, characterized in that: The lower support is provided with vertically extending fixing holes at both lateral ends; Matching holes are provided at both lateral ends of the rotating shaft corresponding to the fixing holes; The rotating shaft passes through the fixing hole and the matching hole through a connecting piece so as to be fixed to the lower support.

4. The air suspension system according to claim 3, characterized in that: The lower support is provided with bosses at two lateral ends thereof and is arranged toward the upper support, and the fixing holes are arranged on the bosses.

5. The air suspension system according to claim 3, characterized in that: An escape groove is provided on the upper side surface of the lower support to escape the upper support rotatably connected to the rotating shaft.

6. The air suspension system according to claim 2, characterized in that: A protective pad is provided on the upper side of the leaf spring, and the protective pad is provided with a clamping slot. The U-shaped bolt includes two screw arms and a bent connecting portion connecting the two screw arms, and the bent connecting portion is clamped in the clamping slot.

7. The air suspension system according to claim 1, characterized in that: The air suspension system further comprises two shock absorbers, which extend vertically and are arranged at the lower sides of the two longitudinal beams, and the lower end of each shock absorber is connected to one end of the corresponding leaf spring away from the guide support.

8. The air suspension system according to claim 1, characterized in that: Each longitudinal beam is provided with a plurality of transversely penetrating mounting holes, and the upper end portion of each guide support and the corresponding thrust rod are mounted in the same mounting hole and are respectively located at opposite side ends of the longitudinal beam in the transverse direction.

9. A vehicle, characterized in that: Comprising an air suspension system as claimed in any one of claims 1 to 8.

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