Full-hydraulic steering system

Abstract

A full-hydraulic steering system belongs to the technical field of automobile manufacturing and comprises a steering column assembly, a steering telescopic shaft, a steering transition shaft support assembly and a full-hydraulic steering gear which are sequentially connected, the steering transition shaft support assembly is fixedly arranged on a frame, and the steering telescopic shaft is added between the steering column assembly and the full-hydraulic steering gear. Extra acting force applied by a steering column to the transition shaft due to machining errors of cab mounting holes is eliminated, the problem that a steering wheel rotates or is heavy in steering is solved, the steering transition shaft support assembly is fixedly arranged on the frame, the steering transition shaft support assembly and the full-hydraulic steering gear can be split off line, operation is more convenient, and the steering efficiency is improved. In addition, the full-hydraulic steering gear does not need to be lifted along with a cab, the length of the steering hose can be conveniently controlled, the position of the steering hose can be conveniently arranged, cost is reduced, and the attractiveness of arrangement of the steering hose is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile manufacturing, in particular to a full hydraulic steering system. Background Art

[0002] At present, the steering systems used in low-speed tractors include two types: mechanical and full hydraulic. The full hydraulic steering system is a system that realizes vehicle steering by converting hydraulic energy into mechanical energy, and has the advantages of high stability, flexible operation, high steering accuracy, and maintenance-free or low maintenance.

[0003] For the existing steering system for low-speed tractors (publication number CN204415494U), the steering column is fixed on the instrument panel, the transition shaft sleeve is fixed on the upper surface of the cab floor, the full hydraulic steering gear is fixed on the lower surface of the cab floor, the lower end of the steering column is connected to the upper end of the transition shaft through a universal joint, and the lower end of the steering transition shaft is connected to the full hydraulic steering gear.

[0004] For the existing full hydraulic steering system, due to certain machining errors in the mounting holes on the cab, when the bolts of the steering column and the transition shaft sleeve are tightened, it is easy for the steering column to exert an additional force on the steering transition shaft, resulting in the splines of the transition shaft and the input end of the full hydraulic steering gear being non-coaxial, and problems such as the steering wheel rotating by itself or heavy steering occurring; in addition, the full hydraulic steering gear is installed at the lower surface position of the cab floor, and two workers are required to operate together when installing or removing it, which is time-consuming and laborious and affects work efficiency; moreover, the full hydraulic steering gear is arranged at the lower surface of the cab floor, and when the cab is lifted, the full hydraulic steering gear also moves together, and the steering hose connected to the steering gear needs to be increased in length to meet the lifting requirements. The steering hose is too long, which is not easy to fix and affects the appearance of the chassis. Summary of the Utility Model

[0005] In order to solve the technical problems in the above background art that in the existing full hydraulic steering system, the splines of the transition shaft and the input end of the full hydraulic steering gear are prone to being non-coaxial, resulting in steering wheel self-rotation or heaviness, and the assembly efficiency of the full hydraulic steering gear is low, the utility model provides a full hydraulic steering system.

[0006] The technical solution of the utility model is as follows:

[0007] The utility model provides a full-hydraulic steering system, which includes a steering column assembly fixedly arranged on the instrument panel. The lower end of the steering column assembly is connected with a transition shaft bracket assembly through a steering telescopic shaft. The steering transition shaft bracket assembly is fixedly arranged on the vehicle frame. A full-hydraulic steering gear is fixedly connected below the steering transition shaft bracket assembly. The input end of the full-hydraulic steering gear is connected with the transition shaft of the steering transition shaft bracket assembly. A steering telescopic shaft is added between the steering column assembly and the full-hydraulic steering gear, eliminating the additional force exerted by the steering column on the transition shaft due to the machining error of the cab mounting hole, solving the problems of the steering wheel rotating by itself or the steering being heavy. The steering transition shaft bracket assembly is fixedly arranged on the vehicle frame, and the full-hydraulic steering gear is fixedly arranged on the longitudinal beam of the vehicle frame through the steering transition shaft bracket assembly. Compared with the original structure of the cab bottom assembly method, the steering transition shaft bracket assembly and the full-hydraulic steering gear can be sub-assembled offline, which is more convenient for operation, can reduce one worker, save labor, and improve the assembly efficiency. In addition, the full-hydraulic steering gear does not need to be lifted with the cab, which is convenient for controlling the length of the steering hose and arranging its position, reducing the cost and improving the aesthetics of the steering hose layout.

[0008] Preferably, the steering column assembly includes a steering column, and the steering column is fixedly installed on the mounting seat through an adjusting assembly. The mounting seat is fixedly installed on the instrument panel, and the steering column can be adjusted in the front-back, up-down directions according to requirements to improve the comfort of the driver.

[0009] Preferably, the lower end of the steering column is connected with the steering telescopic shaft through a first universal joint, and the lower end of the steering telescopic shaft is connected with the transition shaft on the steering transition shaft bracket assembly through a second universal joint, avoiding interference between the steering column, the steering telescopic shaft and the steering transition shaft bracket assembly.

[0010] Preferably, the steering transition shaft bracket assembly includes a bracket and a vertically arranged transition shaft. The bracket is fixedly arranged on the vehicle frame, and the transition shaft is rotatably arranged on the bracket, which is convenient for the installation of the bracket and the connection between the transition shaft and the full-hydraulic steering gear.

[0011] Preferably, the bracket includes a horizontal mounting surface and a vertical mounting surface. The horizontal mounting surface and the vertical mounting surface are fixedly connected through an inclined connecting part. The transition shaft is rotatably arranged on the horizontal mounting surface, and the full-hydraulic steering gear is fixedly arranged below the horizontal mounting surface. The vertical mounting surface is fixedly connected with the vehicle frame, which is convenient for fixing and adjusting the position of the full-hydraulic steering gear.

[0012] Preferably, a bushing is fixedly arranged on the horizontal mounting surface, and the transition shaft is rotatably arranged in the bushing through a bearing. The transition shaft is limited by a shaft retaining ring and a hole retaining ring to ensure the limitation of the transition shaft.

[0013] Preferably, the upper end of the transition shaft is connected to the lower end of the steering telescopic shaft through a second universal joint. The lower end of the transition shaft passes through the horizontal mounting surface and is spline-connected to the input end of the full-hydraulic steering gear, facilitating the connection between the transition shaft and the full-hydraulic steering gear.

[0014] Preferably, the upper surface of the full-hydraulic steering gear is provided with an input end, and several oil inlet and outlet ports are opened on the side surface of the full-hydraulic steering gear, facilitating the connection between the full-hydraulic steering gear and the transition shaft and the steering oil pipe, as well as the layout of their positions.

[0015] Preferably, the oil inlet and outlet ports are connected to the steering hose through pipe joints. The position of the full-hydraulic steering gear is fixed and does not need to be lifted with the cab anymore, facilitating the control of the length of the steering hose and its position layout, reducing costs, and improving the aesthetics of the steering hose layout.

[0016] Preferably, the oil inlet and outlet ports are connected to the steering steel pipe through pipe joints. Compared with the hose, the steering steel pipe not only saves costs but also is easy to arrange and is more neat and beautiful.

[0017] It can be seen from the above technical solutions that the advantages of the present utility model are as follows:

[0018] 1. A steering telescopic shaft and a steering transition shaft support assembly are added between the steering column assembly and the full-hydraulic steering gear, eliminating the additional force exerted by the steering column on the transition shaft due to the machining error of the cab mounting hole, solving the problems of self-rotation of the steering wheel or heavy steering. The steering transition shaft support assembly is fixedly arranged on the frame, and the full-hydraulic steering gear is fixedly arranged on the longitudinal beam of the frame through the steering transition shaft support assembly. The steering transition shaft support assembly and the full-hydraulic steering gear can be sub-assembled offline, which is more convenient for operation, can reduce one worker, save labor, and improve the assembly efficiency. In addition, the full-hydraulic steering gear does not need to be lifted with the cab anymore, facilitating the control of the length of the steering hose and its position layout, reducing costs, and improving the aesthetics of the steering hose layout.

[0019] 2. The position of the full-hydraulic steering gear is fixed, and at the same time, the steering hose connected to the full-hydraulic steering gear is replaced with a steering steel pipe, which not only saves costs but also is easy to arrange and is more neat and beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic structural diagram of a full-hydraulic steering system according to one or more embodiments of the present utility model;

[0022] Figure 2 This is a schematic structural view of a steering column assembly according to one or more embodiments of the present utility model;

[0023] Figure 3 This is a schematic structural view of a telescopic steering shaft according to one or more embodiments of the present utility model;

[0024] Figure 4 This is a schematic structural view of a steering intermediate shaft bracket assembly according to one or more embodiments of the present utility model;

[0025] Figure 5 This is a schematic structural view of a full hydraulic steering gear according to one or more embodiments of the present utility model;

[0026] The components represented by the reference numerals in the figures are:

[0027] 1. Steering column assembly; 2. First universal joint; 3. Telescopic steering shaft; 4. Steering intermediate shaft bracket assembly; 5. Full hydraulic steering gear; 6. Steering steel pipe; 7. Pipe joint; 8. Steering column; 9. Connection end; 10. Mounting seat; 11. First mounting hole; 12. Adjusting handle; 13. Second universal joint; 14. Bracket; 15. Intermediate shaft; 16. Bush; 17. Second mounting hole; 18. Input end; 19. Third mounting hole; 20. Oil inlet and outlet. Detailed implementation manners

[0028] In order to make the objectives, features, and advantages of the present utility model more obvious and understandable, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the specific embodiments. Obviously, the embodiments described below are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in this patent, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this patent.

[0029] In a typical embodiment of the present utility model, as Figures 1-5 shown, a full hydraulic steering system is proposed, including: a steering column assembly 1, a telescopic steering shaft 3, a steering intermediate shaft bracket assembly 4, and a full hydraulic steering gear 5. The steering column assembly 1 is connected to the telescopic steering shaft 3 through a first universal joint, the telescopic steering shaft 3 is connected to the steering intermediate shaft bracket assembly 4 through a second universal joint 13, the steering intermediate shaft bracket assembly 4 is connected to the full hydraulic steering gear 5, and a telescopic steering shaft 3 is added between the steering column assembly 1 and the full hydraulic steering gear 5, eliminating the additional force exerted by the steering column 8 on the intermediate shaft 15 due to the machining error of the cab mounting hole, and solving the problems of self-rotation of the steering wheel or heavy steering.

[0030] It should be noted that the steering telescopic shaft 3 is a telescopic structure. The steering telescopic shaft 3 is an existing structure, and its specific structure will not be elaborated here.

[0031] As Figure 1 shown, the steering column assembly 1 is fixedly arranged on the instrument panel of the cab, the steering intermediate shaft bracket assembly 4 is fixedly arranged on the longitudinal beam of the frame, and the full hydraulic steering gear 5 is fixedly arranged on the longitudinal beam of the frame through the steering intermediate shaft bracket assembly 4. Compared with the original structure of assembling at the bottom of the cab, the steering intermediate shaft bracket assembly 4 and the full hydraulic steering gear 5 can be sub-assembled offline, which is more convenient for operation, can reduce one worker, save labor, and improve the assembly efficiency. In addition, the full hydraulic steering gear 5 does not need to be lifted with the cab, which is convenient for controlling the length of the steering hose and arranging its position, reduces costs, and improves the aesthetics of the steering hose layout.

[0032] The steering column assembly 1 is an adjustable structure. As Figure 2 shown, the steering column assembly 1 includes a steering column 8 and a mounting seat 10. The steering column 8 is fixedly installed on the mounting seat 10 through an adjusting component. The adjusting component is provided with an adjusting handle 12, and the tightness between the adjusting component and the steering column 8 can be controlled through the adjusting handle 12, so as to realize the adjustment of the steering column 8 in the front-back and up-down directions, improve the comfort of the driver. A number of first mounting holes 11 are opened on the mounting seat 10 to be fixedly installed on the instrument panel of the cab through bolts.

[0033] The lower end of the steering column 8 is a connecting end 9, and the connecting end 9 is connected to the steering telescopic shaft 3 through a first universal joint 2. As Figure 3 shown, the lower end of the steering telescopic shaft 3 is connected with a second universal joint 13, and the steering telescopic shaft 3 is connected to the intermediate shaft 15 on the steering intermediate shaft bracket assembly 4 through the second universal joint 13. Adding the steering telescopic shaft 3 between the steering column assembly 1 and the full hydraulic steering gear 5 eliminates the additional force exerted by the steering column 8 on the intermediate shaft 15 due to the machining error of the cab mounting hole, solves the problems of steering wheel self-rotation or heavy steering, and is convenient for arranging the position of the steering intermediate shaft bracket assembly 4.

[0034] As Figure 4 shown, the steering intermediate shaft bracket assembly 4 includes a bracket 14 and an intermediate shaft 15. The bracket 14 includes a horizontal mounting surface and a vertical mounting surface. A number of second mounting holes 17 are opened on both the horizontal mounting surface and the vertical mounting surface. The horizontal mounting surface and the vertical mounting surface are fixedly connected together through an inclined connecting part.

[0035] The transition shaft 15 is rotatably arranged on the horizontal mounting surface of the bracket 14. Specifically, a bushing 16 is fixedly arranged on the horizontal mounting surface of the bracket 14 by welding. The transition shaft 15 is rotatably arranged in the bushing 16 through a bearing and is limited by a shaft retaining ring and a hole retaining ring. The transition shaft 15 is vertically arranged. The upper end of the transition shaft 15 is connected to the lower end of the steering telescopic shaft 3 through a second universal joint 13. The lower end of the transition shaft 15 passes through the horizontal mounting surface of the bracket 14 and is connected to the input end 18 of the full hydraulic steering gear 5.

[0036] As Figure 5 shown, the upper surface of the full hydraulic steering gear 5 is provided with a third mounting hole 19 and an input end 18. The third mounting hole 19 corresponds to the second mounting hole 17 on the horizontal mounting surface of the bracket 14 one by one. The full hydraulic steering gear 5 is fixedly arranged at the bottom of the horizontal mounting surface of the bracket 14 through bolts. The transition shaft 15 is coaxially arranged with the input end 18 and is connected through a spline.

[0037] A plurality of oil inlet and outlet ports 20 are formed on the side surface of the full hydraulic steering gear 5. The oil inlet and outlet ports 20 are connected to the steering hose through a pipe joint 7. As Figure 1 shown, in this embodiment, the steering hose is replaced by a steering steel pipe 6. Since the position of the full hydraulic steering gear 5 is fixed and there is no need to lift it with the cab anymore, compared with the hose, the steering steel pipe 6 not only saves costs, but also is convenient for layout and is more neat and beautiful.

[0038] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A full hydraulic steering system, comprising: The steering column assembly (1) fixedly arranged on the instrument panel is characterized in that the lower end of the steering column assembly (1) is connected to the steering transition shaft support assembly (4) through a steering telescopic shaft (3), the steering transition shaft support assembly (4) is fixedly arranged on the vehicle frame, a full hydraulic steering gear (5) is fixedly connected below the steering transition shaft support assembly (4), and the input end (18) of the full hydraulic steering gear (5) is connected to the transition shaft (15) of the steering transition shaft support assembly.

2. The full hydraulic steering system according to claim 1, characterized in that, The steering column assembly (1) includes a steering column (8), and the steering column (8) is fixedly installed on a mounting seat (10) through an adjusting component, and the mounting seat (10) is fixedly installed on the instrument panel.

3. The full hydraulic steering system according to claim 2, characterized in that, The lower end of the steering column (8) is connected to the steering telescopic shaft (3) through a first universal joint (2), and the lower end of the steering telescopic shaft (3) is connected to the transition shaft (15) on the steering transition shaft support assembly (4) through a second universal joint (13).

4. The full hydraulic steering system according to claim 1, wherein The steering transition shaft support assembly (4) includes a support (14) and a vertically arranged transition shaft (15), the support (14) is fixedly arranged on the vehicle frame, and the transition shaft (15) is rotatably arranged on the support (14).

5. The full hydraulic steering system according to claim 4, wherein, The support (14) includes a horizontal mounting surface and a vertical mounting surface, the horizontal mounting surface and the vertical mounting surface are fixedly connected through an inclined connecting part, the transition shaft (15) is rotatably arranged on the horizontal mounting surface, the full hydraulic steering gear (5) is fixedly arranged below the horizontal mounting surface, and the vertical mounting surface is fixedly connected to the vehicle frame.

6. The full hydraulic steering system according to claim 5, characterized in that A bushing (16) is fixedly arranged on the horizontal mounting surface, the transition shaft (15) is rotatably arranged in the bushing (16) through a bearing, and the transition shaft (15) is limited by a shaft retaining ring and a hole retaining ring.

7. The full hydraulic steering system according to claim 4, characterized in that, The upper end of the transition shaft (15) is connected to the lower end of the steering telescopic shaft (3) through a second universal joint (13), and the lower end of the transition shaft (15) passes through the horizontal mounting surface and is splined to the input end (18) of the full hydraulic steering gear (5).

8. The full hydraulic steering system according to claim 1, characterized in that, The upper surface of the full hydraulic steering gear (5) is provided with an input end (18), and a plurality of oil inlet and outlet ports (20) are opened on the side surface of the full hydraulic steering gear (5).

9. The full-hydraulic steering system according to claim 8, wherein, The oil inlet and outlet ports (20) are connected to the steering hose through a pipe joint (7).

10. The full hydraulic steering system according to claim 8, wherein, The oil inlet and outlet ports (20) are connected to the steering steel pipe (6) through a pipe joint (7).

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