Front axle assembly for drive-by-wire chassis of unmanned charging vehicle

Abstract

The utility model discloses a front axle assembly for a drive-by-wire chassis of an unmanned charging vehicle. The front axle assembly comprises an axle tube assembly, an oil tube fixing support, a knuckle assembly, a brake, a drive-by-wire steering engine, a steel plate spring mounting seat and a drive-by-wire steering engine mounting seat, wherein the steel plate spring mounting seat and the drive-by-wire steering engine mounting seat are fixed on the axle tube assembly; and the brake is arranged on the steering knuckle assembly. According to the unmanned drive-by-wire chassis front axle for the charging vehicle, the structure of the unmanned drive-by-wire chassis front axle for the charging vehicle is optimized, the drive-by-wire steering engine mounting seat and the axle tube assembly are fixed together, so that the mechanism is more compact, and the space utilization rate of the vehicle is increased. The steer-by-wire mounting seat is fixedly connected to the axle tube assembly, and when the steer-by-wire mounting seat is mounted, the steer-by-wire mounting seat and the axle jump together, so that the influence of wheel jump and different loads on the toe-in angle of the front wheel is counteracted.

Description

Technical Field

[0001] The utility model belongs to the technical field of wire-controlled chassis, and particularly relates to a front axle assembly for a wire-controlled chassis of an unmanned charging vehicle. Background Art

[0002] Currently, most front axle assemblies of wire-controlled chassis adopt the method of fixing the wire-controlled steering machine on the vehicle frame and connecting the mechanical steering machine through traditional double cross universal joints, ensuring the reliability of the connection. However, this design has significant drawbacks. Specifically, the double cross universal joints will cause energy loss when transmitting the steering torque, and at the same time, it prolongs the torque transmission path, thereby affecting the response speed of the steering system and limiting the agility of vehicle control.

[0003] Another common design of the front axle assembly of wire-controlled chassis is to firmly install the electric recirculating ball steering system on the vehicle frame and connect it to the front axle steering trapezoid arm through a steering tie rod, ensuring the stability of the connection. However, when the vehicle is in motion or the load changes, the displacement of the leaf spring will inevitably affect the position of the steering cross tie rod, thereby changing the front wheel toe angle, which poses a challenge to the straight-line stability during vehicle driving and affects the driving smoothness and passenger comfort. Description of the Drawings

[0004] Figure 1 It is a schematic diagram of a front axle assembly for a wire-controlled chassis of an unmanned charging vehicle according to the utility model;

[0005] Figure 2 It is an assembly schematic diagram of a front axle assembly for a wire-controlled chassis of an unmanned charging vehicle according to the utility model;

[0006] Figure 3 It is a schematic diagram of a front axle steering knuckle assembly for a wire-controlled chassis of an unmanned charging vehicle according to the utility model;

[0007] Figure 4 It is an exploded structural schematic diagram of a front axle steering knuckle assembly for a wire-controlled chassis of an unmanned charging vehicle according to the utility model;

[0008] Figure 5 It is a cross-sectional view of the connection structure between a front axle steering knuckle assembly for a wire-controlled chassis of an unmanned charging vehicle and a wire-controlled steering ball head according to the utility model.

[0009] Reference numerals: 1. Bridge tube assembly; 2. Oil pipe fixing bracket; 3. Steering knuckle assembly; 4. Brake; 5. Wire-controlled steering machine; 6. Leaf spring mounting seat; 7. Wire-controlled steering machine mounting seat; 8. Fixed pin; 9. Main pin shaft; 10. Bearing; 11. Copper bushing; 12. Grease nipple; 13. Dust cover plate; 14. Support shaft; 15. Steering knuckle arm; 16. Steering ball head; 17. Axle hole. Summary of the Utility Model

[0010] In order to increase the space utilization of the vehicle, offset the impact of wheel bounce and different loads on the front wheel toe angle, and improve the steering response speed and steering control accuracy of the charging vehicle, the utility model provides a front axle assembly for the wire-controlled chassis of an unmanned charging vehicle, including a bridge tube assembly, an oil pipe fixing bracket, a steering knuckle assembly, a brake, a wire-controlled steering machine, a leaf spring mounting seat fixed on the bridge tube assembly, and a wire-controlled steering machine mounting seat; the brake is installed on the steering knuckle assembly.

[0011] Furthermore, the oil pipe fixing bracket is fixed on the steering knuckle assembly, and the steering knuckle assembly also includes a fixing pin, a kingpin shaft, a bearing, a copper sleeve, a grease nipple and a dust cover. The brake support shaft and the steering knuckle arm are also integrated by an integrated molding method. The steering knuckle assembly is connected to the axle assembly through the kingpin shaft pin.

[0012] Furthermore, the steering knuckle assembly is connected to the wire-controlled steering gear through a steering ball head, ensuring that the left and right steering knuckle assemblies can work together to achieve steering when steering.

[0013] The utility model improves the connection mode of the wire-controlled steering gear and the bridge tube assembly. The mechanism layout is made more compact, the space utilization rate of the vehicle is increased, the transmission path of the steering torque is reduced, and the response speed of the vehicle's steering system is improved; at the same time, the number of parts is reduced, thereby reducing the processing cost. The wire-controlled steering gear is fixed to the wire-controlled steering gear mounting seat and moves together with the bridge tube assembly, thereby offsetting the impact of wheel bounce and different loads on the front wheel toe angle, reducing the loss of force transmission caused by bounce steering, and improving the steering response time and the accuracy of the steering angle.

[0014] The utility model ensures the consistency of the unmanned driving system of the unmanned vehicle in controlling the chassis, reduces the control difficulty, and improves the control accuracy, thereby improving the driving stability and safety of the unmanned vehicle as a whole. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0016] like Figures 1-4As shown in the figure, a front axle assembly for a steer-by-wire chassis of an unmanned charging vehicle includes a bridge tube assembly 1, an oil pipe fixing bracket 2, a steering knuckle assembly 3, a steer-by-wire steering machine 5; a brake 4 fixed on the steering knuckle assembly 3; a leaf spring mounting seat 6 and a steer-by-wire steering machine mounting seat 7 fixed on the bridge tube assembly 1; the steer-by-wire steering machine 5 is fixed on the steer-by-wire steering machine mounting seat 7 and integrated with the bridge tube assembly 1. The bridge tube assembly 1 is the main structure of the front axle and is made of high-strength lightweight materials to provide sufficient load-bearing capacity and structural stiffness.

[0017] Preferably, the steering knuckle assembly 3 is connected to the axle assembly 4 through a kingpin 9 via a shaft hole 17.

[0018] Preferably, the steering knuckle assembly 3 is connected to the steer-by-wire steering machine 5 through a steering ball joint 16 to ensure that the steering knuckle assemblies 3 on both the left and right sides can achieve linkage together during steering to realize steering.

[0019] The oil pipe fixing bracket 2 is fixed on the steering knuckle assembly 3 and is used to fix hydraulic components such as oil pipes to ensure the stable operation of the hydraulic system. The steering knuckle assembly 3 further includes a fixing pin 8, a kingpin 9, a bearing 10, a copper bushing 11, a grease nipple 12, and a dust cover 13; the steering knuckle assembly 3 integrates a brake support shaft 14 and a steering knuckle arm 15 through an integrated molding method. The grease nipple 12 is used for lubricating oil filling; the dust cover 13 prevents dust and debris from entering key components.

[0020] During installation, the copper bushing 11 is press-fitted on the steering knuckle assembly 3 to play a role in rotational lubrication and reduce the rotational resistance; then the oil pipe fixing bracket 2, the grease nipple 12, and the dust cover 13 are fixed on the steering knuckle assembly 3; the kingpin 9 connects the bearing 10 with the steering knuckle assembly 3, and finally is fixed through the fixing pin 8. The steer-by-wire steering machine 5 is installed on the steer-by-wire steering machine mounting seat 7 and integrated with the bridge tube assembly 1. Finally, the brake 4 and other necessary electrical and hydraulic connectors are installed.

[0021] The steering knuckle assembly 3 integrates a brake support shaft 14 and a steering knuckle arm 15 through an integrated molding method. Through the integrated molding method, the consistency of parts during processing is ensured, and at the same time, the strength of the steering knuckle assembly is ensured. The steering knuckle assembly 3 is an integrated assembly. The installation and fixation of parts are reduced, and at the same time, no other parts are installed, reducing the tolerance impact brought by the installation of parts, ensuring the installation accuracy and position accuracy of parts. Greatly improving the processing qualification rate of the steering knuckle assembly 3, and at the same time greatly reducing the installation times of parts, thereby reducing the processing cost and improving the market competitiveness of the steer-by-wire chassis equipped with this front axle assembly.

[0022] The steer-by-wire steering gear 5 is fixed to the steer-by-wire steering gear mounting seat 7 and moves together with the axle tube assembly 1. Thus, it is ensured that the relative positions of the steer-by-wire steering gear 5 and the steering knuckle assembly 3 will not change with the wheel bounce caused by uneven road surfaces or the body height change caused by different vehicle load weights, thereby offsetting the change in the wheel toe angle caused by the change in the relative positions of the steer-by-wire steering gear 5 and the steering knuckle assembly 3, ensuring the consistency of the chassis steering trapezoid. As a result, the vehicle has the same straight-line driving performance and steering performance under different load conditions, ensuring the consistency of the chassis control of the driverless vehicle's driverless system, reducing the control difficulty, improving the control accuracy, and thus enhancing the driving stability and safety of the entire driverless vehicle.

[0023] Although the embodiments of the present invention have been described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A front axle assembly for a wire-controlled chassis of an unmanned charging vehicle, characterized in that: The invention comprises a bridge tube assembly (1), an oil pipe fixing bracket (2), a steering knuckle assembly (3), a brake (4), a wire-controlled steering gear (5), a leaf spring mounting seat (6) fixed on the bridge tube assembly (1), and a wire-controlled steering gear mounting seat (7); the brake (4) is mounted on the steering knuckle assembly (3).

2. The front axle assembly for the wire-controlled chassis of an unmanned charging vehicle according to claim 1 is characterized in that: The oil pipe fixing bracket (2) is fixed on the steering knuckle assembly (3), and the steering knuckle assembly (3) further comprises a fixing pin (8), a kingpin shaft (9), a bearing (10), a copper sleeve (11), a grease nipple (12), and a dust cover plate (13).

3. The front axle assembly for the wire-controlled chassis of an unmanned charging vehicle according to claim 1 is characterized in that: The steering knuckle assembly (3) is also integrated with a brake support shaft (14) and a steering knuckle arm (15) by means of integrated molding.

4. The front axle assembly for the wire-controlled chassis of an unmanned charging vehicle according to claim 1 is characterized in that: The steering knuckle assembly (3) is connected to the wire-controlled steering machine (5) via a steering ball head (16), ensuring that the left and right steering knuckle assemblies (3) can be linked together during steering.

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