Steering system with rubber balanced suspension

Abstract

The invention discloses a steering system with a rubber balanced suspension. The steering system comprises two sets of rubber single-side assembly bodies arranged in parallel and a driving device connected between the two sets of rubber single-side assembly bodies. A main pin shaft is fixedly arranged on the top face of the rubber single-side assembly body, two ends of the driving device are respectively connected with a steering rocker arm, one end of each steering rocker arm is hinged to the driving device, and the other end of each steering rocker arm is fixedly connected with the upper end of the main pin shaft. When the driving device drives the steering rocker arms at the two ends of the driving device to rotate in the same direction, the two sets of rubber single-side assembly bodies are driven by the main pin shafts to rotate in the same direction. Rear wheel steering can be achieved, the turning diameter is reduced, and the maneuverability of the automobile crane is improved.

Description

Technical Field

[0001] The invention belongs to the field of wheeled lifting machinery, and in particular relates to a steering system with a rubber balancing suspension. Background Art

[0002] Suspension is a general term for all force transmission connection devices between the vehicle frame and the axle. The main function of the suspension is to transfer the vertical reaction force, longitudinal reaction force and lateral reaction force of the road surface on the wheels and the torque formed by these reaction forces to the frame to ensure the normal driving of the vehicle. The commonly used suspension forms for domestic commercial vehicles and engineering vehicles are leaf spring suspension and rubber suspension. The rubber suspension has the characteristics of light weight, low noise, maintenance-free and variable stiffness, so that the deviation frequency of the whole vehicle of the truck crane does not change much when it is loaded or not, which is conducive to improving the smoothness of the whole vehicle, and is widely used in the rear suspension of truck cranes.

[0003] like Figure 1 As shown, the existing rubber balance suspension system 100 is a component connecting the axle 200 and the frame 300, and is rigidly connected to the axle 200 and the frame 300 through fasteners, transmitting the force and torque input by the axle, and playing a role of connecting the upper and lower parts. When one side of the axle is impacted, it will be transmitted to the same side of the other axle through the rubber balance suspension system, thereby playing a role of balancing the force on the axle.

[0004] The Chinese utility model patent with publication number CN219191852U discloses a rubber suspension, in which a rubber balance suspension 1 is used as a rear suspension, connecting a vehicle frame and a vehicle axle. Due to limited layout space, the steering mechanism cannot be arranged on the vehicle axle, and the rear wheel is rigidly connected to the vehicle axle, so the rear wheel cannot turn. As a result, the turning diameter of a long-wheelbase truck crane becomes larger. In order to reduce the minimum turning diameter of the truck crane, the inner and outer wheel turning angles of the front wheels must be increased, which will increase the tire resistance torque and increase the tire wear.

[0005] In summary, the existing rubber balance suspension is rigidly connected to the frame through fasteners, only the front wheels have the steering function, and the rear wheels cannot be steered, the turning diameter of the truck crane becomes larger, and the maneuverability becomes worse. Summary of the invention

[0006] Purpose of the invention: The purpose of the present invention is to provide a steering system with a rubber balancing suspension, which can realize rear wheel steering, reduce the turning diameter, and improve the maneuverability of the truck crane.

[0007] Technical solution: A steering system with a rubber balanced suspension of the present invention comprises two groups of rubber single-sided assemblies arranged in parallel and a driving device connected between the two groups of rubber single-sided assemblies; a kingpin shaft is fixedly arranged on the top surface of the rubber single-sided assembly, and a steering rocker arm is respectively connected to both ends of the driving device, one end of the steering rocker arm is hingedly connected to the driving device, and the other end thereof is fixedly connected to the upper end of the kingpin shaft; when the driving device drives the steering rocker arms at both ends thereof to rotate in the same direction, the two groups of rubber single-sided assemblies are driven to rotate in the same direction through the kingpin shaft.

[0008] By using the drive device to push the rubber suspension single-side assembly to steer, the rear axle is then steered in the opposite direction to the front axle, achieving low-speed steering and reducing the turning diameter.

[0009] Furthermore, a circle of first grooves is opened on the outer side of the kingpin shaft along the circumferential direction, a suspension fixing support is sleeved on the kingpin shaft, a circle of second grooves corresponding to the first grooves is opened on the inner wall of the suspension fixing support, and the first grooves and the second grooves have the same size; a fastener installation groove for installing a fastener is opened on the outer wall of the suspension fixing support, and the fastener installation groove is connected with the second groove; the fastener cooperates with the first groove on the outer side of the kingpin shaft, and the fastener is used to prevent the kingpin shaft from moving up and down, so that the kingpin shaft can only perform rotational movement.

[0010] Furthermore, the upper end of the kingpin shaft is processed into a polygon and has an interference fit with the steering rocker arm, so that the kingpin shaft can rotate along with the steering rocker arm.

[0011] Furthermore, the suspension fixing support is fixedly connected to the vehicle frame to achieve the installation of the entire steering system.

[0012] Furthermore, two ends of the bottom of the rubber single-sided assembly are connected to the axle through rubber ball joints, so as to realize the installation connection between the rubber single-sided assembly and the axle.

[0013] Furthermore, positioning holes are respectively provided at two ends of the top surface of the rubber single-sided assembly for cooperating with positioning pins installed on the frame to achieve installation connection between the rubber single-sided assembly and the frame.

[0014] Furthermore, the driving device adopts a hydraulic cylinder, which drives the steering rocker arm to rotate through the extension and retraction of the hydraulic cylinder, thereby providing driving force for the steering rocker arm.

[0015] Furthermore, there are two hydraulic cylinders, which are coaxially arranged, and adjacent ends of the two hydraulic cylinders are mounted on a fixed plate, thereby achieving the installation and fixation of the hydraulic cylinders.

[0016] Furthermore, two groups of V-shaped thrust rods are arranged between the two groups of rubber single-sided assemblies, and the V-mouth ends of the two groups of V-shaped thrust rods are opposite to each other. The tip of one group of V-shaped thrust rods is connected to the front axle through a ball head, and the tip of the other group of V-shaped thrust rods is connected to the rear axle through a ball head. The V-shaped thrust rods mainly bear the longitudinal force and lateral force of the whole vehicle.

[0017] Furthermore, the maximum deflection angle of the ball head is ≤14°. Since the maximum turning angle of the axle is limited by the deflection angle of the ball head, the maximum turning angle of the axle is ≤ the maximum deflection angle of the ball head.

[0018] Beneficial effects: Compared with the prior art, the significant technical effects of the present invention are as follows:

[0019] When the driving device drives the steering rocker arms at both ends to rotate in the same direction, the two sets of rubber single-sided assemblies are driven to rotate in the same direction through the kingpin shaft, and then the rear axle is steered to achieve the axial steering of the rear wheels. Since the steering of the rear axle is opposite to that of the front axle, the turning diameter can be reduced and the car's passability can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the installation of a rubber balanced suspension system in the prior art;

[0021] Figure 2 A schematic structural diagram of a steering system with a rubber balancing suspension disclosed in an embodiment of the present invention;

[0022] Figure 3 for Figure 2 Schematic diagram of the structure of the middle rubber unilateral assembly;

[0023] Figure 4 for Figure 2 A partial enlarged view of the middle rubber unilateral assembly;

[0024] Figure 5 for Figure 4 Longitudinal section view of . DETAILED DESCRIPTION

[0025] The technical solution of the present invention is described in detail below in conjunction with specific implementation methods and the accompanying drawings of the specification.

[0026] like Figure 2-5 As shown, the steering system with rubber balanced suspension of the present invention involves the following components: a rubber single-sided assembly 1, a positioning pin 2, a fixing plate 3, a driving device 4, a steering rocker arm 5, a suspension fixing support 6, a V-shaped thrust rod 7, and a fastener 8.

[0027] There are two groups of rubber single-sided assemblies 1, which are arranged in parallel. A driving device 4 is connected between the two groups of rubber single-sided assemblies 1. A kingpin shaft 9 is fixedly arranged on the top surface of the rubber single-sided assembly 1. A steering rocker arm 5 is connected to both ends of the driving device, one end of the steering rocker arm 5 is hingedly connected to the driving device 4, and the other end is fixedly connected to the upper end of the kingpin shaft 9. When the driving device 4 drives the steering rocker arms 5 at both ends to rotate in the same direction, the two groups of rubber single-sided assemblies 1 are driven to rotate in the same direction through the kingpin shaft 9. The two ends of the bottom of the rubber single-sided assembly 1 are connected to the axle through a rubber ball joint. Positioning holes are respectively provided at both ends of the top surface of the rubber single-sided assembly 1 for matching with the positioning pin 2 fixedly installed on the frame. When the positioning hole and the positioning pin 2 are assembled, the rubber single-sided assembly 1 is fixedly connected to the frame, and at this time, the rubber single-sided assembly 1 cannot rotate. The positioning pin 2 can be driven by the hydraulic pressure of the hydraulic cylinder to perform telescopic movement on the frame, and the positioning pin 2 can move in the direction of the positioning pin axis on the frame through the hydraulic cylinder. Two groups of V-shaped thrust rods 7 are arranged between the two groups of rubber single-sided assemblies 1, and the V-mouth ends of the two groups of V-shaped thrust rods 7 are opposite to each other. The tip of one group of V-shaped thrust rods 7 is connected to the front axle through a ball head, and the tip of the other group of V-shaped thrust rods 7 is connected to the rear axle through a ball head.

[0028] In this embodiment, the driving device 4 adopts a hydraulic cylinder, and the steering rocker arm 5 is driven to rotate by the extension and contraction of the hydraulic cylinder. There are two hydraulic cylinders, which are coaxially arranged, and the adjacent ends of the two hydraulic cylinders are installed on the fixed plate 3.

[0029] The upper end of the kingpin shaft 9 is processed into a polygon and has an interference fit with the steering rocker arm 5; in this embodiment, the upper end of the kingpin shaft 9 is processed into a hexagon, and the steering rocker arm 5 also has a hexagonal opening.

[0030] like Figure 3-5 As shown, a circle of first grooves is provided in the circumferential direction on the outer side of the kingpin shaft 9, and a suspension fixing support 6 is sleeved on the kingpin shaft 9. A circle of second grooves corresponding to the first grooves is provided on the inner wall of the suspension fixing support 6, and the first grooves and the second grooves have the same size; in this embodiment, the first groove and the second grooves enclose a ring. The suspension fixing support 6 is fixedly connected to the frame to realize the installation and positioning of the entire steering system; in this embodiment, the suspension fixing support 6 is welded to the frame. The fastener installation groove provided on the outer wall of the suspension fixing support 6 is used to install the fastener 8, and the fastener installation groove is connected to the second groove. The fastener 8 is transitionally matched with the first groove on the outer side of the kingpin shaft 9. When the fastener 8 is inserted into the first groove, the fastener 8 can prevent the kingpin shaft 9 from moving up and down, so that the kingpin shaft 9 can only perform circumferential rotation. The fastener 8 connects the suspension fixing support 6, the frame and the kingpin shaft 9 together.

[0031] In the present invention, the suspension fixed support 6 is fixedly connected to the vehicle frame, one end of the rubber single-side assembly 1 is connected to the suspension fixed support 6 through the kingpin shaft 9, and the other end is connected to the vehicle axle through the rubber ball joint. The entire system realizes the load-bearing function of the suspension through the rubber single-side assembly 1, and the hydraulic cylinder drives the steering rocker arm 5 to rotate. The steering rocker arm 5 is connected to the suspension fixed support 6 through the kingpin shaft 9, so that the vehicle axle is driven to realize the steering function through the rubber single-side assembly 1. The hydraulic cylinder is used to push the rubber suspension single-side assembly to steer, and then the rear axle is steered, which is opposite to the steering of the front axle, so as to realize the purpose of low-speed steering and reducing the turning diameter.

[0032] When rear wheel steering is not required, the rubber unilateral assembly 1 is fixed to the vehicle frame through the kingpin shaft 9 and two locating pins 2, wherein the two locating pins 2 are clearance-matched with the rubber unilateral assembly 1, and the kingpin shaft 9 is clearance-matched with the suspension fixed support 6. When the hydraulic cylinder is not working, it will retract, and the rubber unilateral assembly 1 will not rotate at this time. Therefore, the rotation of the rubber unilateral assembly 1 on both sides is restricted by locking the hydraulic cylinders 4 on both sides, and the rear wheel cannot perform axle steering at this time.

[0033] When the rear axle needs to be steered, the frame controls the locating pin 2 to retract, and the locating pin 2 is separated from the locating hole on the top surface of the rubber single-sided assembly 1. At this time, the rubber single-sided assembly 1 is only connected to the frame through the kingpin shaft 9. The hydraulic cylinder 4 pushes the steering rocker arm 5 to rotate. Since the steering rocker arm 5 and the kingpin shaft 9 have an interference fit, the steering rocker arm 5 drives the rubber single-sided assembly 1 to rotate, and the rubber single-sided assemblies 1 on both sides turn in the same direction, thereby driving the axle to steer. Since the movement directions of the two ends of the bottom of the rubber single-sided assembly 1 are opposite, the movement directions of the rear axle and the front axle are opposite, which leads to the opposite direction of the rear wheel and the front wheel turning angle, thereby achieving the purpose of reducing the turning diameter.

[0034] In the present invention, the maximum deflection angle of the ball head connecting the V-shaped thrust rod 7 and the axle is ≤14°. The maximum rotation angle of the axle of this mechanism is limited by the deflection angle of the ball head of the thrust rod 7, so the maximum rotation angle of the axle is ≤ the maximum deflection angle of the ball head of the thrust rod 7.

Claims

1. A steering system with a rubber balanced suspension, characterized in that: It comprises two sets of rubber single-side assemblies (1) arranged in parallel and a driving device (4) connected between the two sets of rubber single-side assemblies (1); A kingpin shaft (9) is fixedly arranged on the top surface of the rubber single-sided assembly (1); two ends of the driving device (4) are respectively connected to a steering rocker arm (5); one end of the steering rocker arm (5) is hingedly connected to the driving device (4), and the other end thereof is fixedly connected to the upper end of the kingpin shaft (9); When the driving device (4) drives the steering rocker arms (5) at both ends thereof to rotate in the same direction, the two groups of rubber single-side assemblies (1) are driven to rotate in the same direction through the kingpin shaft (9).

2. The steering system with rubber balance suspension according to claim 1, characterized in that: The outer side of the kingpin shaft (9) is provided with a circle of first grooves along the circumferential direction, the kingpin shaft (9) is sleeved with a suspension fixing support (6), and the inner wall of the suspension fixing support (6) is provided with a circle of second grooves corresponding to the first grooves, and the first grooves and the second grooves have the same size; The outer wall of the suspension fixing support (6) is provided with a fastener installation groove for installing a fastener (8), and the fastener installation groove is connected to the second groove; The fastener (8) cooperates with the first groove on the outer side of the main pin shaft (9), and the fastener (8) is used to prevent the main pin shaft (9) from moving up and down.

3. The steering system with rubber balanced suspension according to claim 1, characterized in that: The upper end of the kingpin shaft (9) is processed into a polygon and has an interference fit with the steering rocker arm (5).

4. The steering system with rubber balance suspension according to claim 1, characterized in that: The suspension fixing support (6) is fixedly connected to the vehicle frame.

5. The steering system with rubber balance suspension according to claim 1, characterized in that: The two ends of the bottom of the rubber single-sided assembly (1) are connected to the axle via rubber ball joints.

6. The steering system with rubber balance suspension according to claim 1, characterized in that: Positioning holes are respectively provided at both ends of the top surface of the rubber single-sided assembly (1) for cooperating with positioning pins (2) installed on the vehicle frame.

7. The steering system with rubber balance suspension according to claim 1, characterized in that: The driving device (4) adopts a hydraulic cylinder, and the steering rocker arm (5) is driven to rotate by the extension and retraction of the hydraulic cylinder.

8. The steering system with rubber balance suspension according to claim 7, characterized in that: There are two hydraulic cylinders, which are coaxially arranged, and adjacent ends of the two hydraulic cylinders are mounted on a fixed plate (3).

9. The steering system with rubber balance suspension according to claim 1, characterized in that: Two groups of V-shaped thrust rods (7) are arranged between the two groups of rubber single-sided assemblies (1), the V-mouth ends of the two groups of V-shaped thrust rods (7) are opposite to each other, the tip of one group of V-shaped thrust rods (7) is connected to the front axle through a ball head, and the tip of the other group of V-shaped thrust rods (7) is connected to the rear axle through a ball head.

10. The steering system with rubber balance suspension according to claim 9, characterized in that: The maximum deflection angle of the ball head is ≤14°.

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