Novel double-side-cover hydraulic power-assisted recirculating ball steering gear assembly

Abstract

According to the novel double-side-cover hydraulic power-assisted circulating ball steering gear assembly, a steering screw assembly serves as a hydraulic control valve to control flowing of hydraulic oil; the steering nut assembly and the steering screw assembly are matched through a steel ball I to form a pin roller screw pair, the steering screw assembly and the valve body assembly are limited through an angular contact ball bearing composed of an outer ring and a steel ball II, and double tooth parts between the steering nut assembly and the steering arm shaft are meshed to form a rack-gear transmission pair. The left side cover assembly and the right side cover assembly are fixed on the steering arm shaft through the locking nut, the anti-attrition pad is arranged between the left side cover assembly and the right side cover assembly and the steering arm shaft, the locking nut is axially limited, and the steering arm shaft is assembled in the shell assembly. The problem that a traditional single-side-cover hydraulic power-assisted circulating ball steering gear is large in space boundary dimension is solved.

Description

Technical Field

[0001] The invention belongs to a steering gear assembly, in particular to a novel double-side cover hydraulic power-assisted circulating ball steering gear assembly. Background Art

[0002] At present, the structure of the whole vehicle tends to be more compact and lightweight. The conventional single-side cover hydraulic power-assisted circulating ball steering gear has many limitations due to the large size of the side cover and the heavy overall weight. We specially launch a new double-side cover hydraulic power-assisted circulating ball steering gear for commercial vehicles. It is based on the traditional single-side cover hydraulic power-assisted circulating ball steering gear. The diameters of the two transverse holes at the output end and the non-output end of the housing assembly are kept consistent, and the left and right side cover assemblies and locking nuts are used for limiting. The end faces of the parts at the output end and the non-output end of the steering gear assembly are not higher than the end faces of the transverse holes of the housing assembly. In this way, the external dimensions of the steering gear are significantly reduced without changing the output torque. At the same time, the adjustment bolts, housing side cover connecting bolts and dust seals / dust covers and other protective parts are reduced, making the structure simpler. Summary of the invention

[0003] The purpose of the invention is: The purpose of the patent of this invention is to provide a double-side cover hydraulic circulating ball steering gear suitable for commercial vehicles with a more compact structure and lightweight vehicle, which solves the problem of large spatial dimensions of traditional single-side cover hydraulic power-assisted circulating ball steering gear.

[0004] To achieve the above object, the technical solution of the present invention is: A novel double-side cover hydraulic power-assisted circulating ball steering gear assembly comprises a housing assembly, a steel ball I, a steering nut assembly, a bolt, a valve body assembly, an outer ring, a steel ball II, a steering screw assembly, a steering arm shaft, an O-ring I, a locking nut, a left cover assembly, a friction-reducing pad and a right cover assembly, and is characterized in that: the steering screw assembly serves as a hydraulic control valve to control the flow of hydraulic oil; the steering nut assembly and the steering screw assembly cooperate with the steel ball I to form a roller screw pair; the steering screw assembly and the valve body assembly are limited by an angular contact ball bearing composed of an outer ring and a steel ball II; the teeth on both sides of the steering nut assembly and the steering arm shaft mesh to form a rack-pinion transmission pair.

[0005] The left and right side cover assemblies are fixed on the steering arm shaft through locking nuts. A friction reducing pad is provided between the left and right side cover assemblies and the steering arm shaft, which is also axially limited by the locking nuts. The steering arm shaft is assembled in the housing assembly.

[0006] The left cover assembly, the right cover assembly and the housing assembly are sealed by O-rings.

[0007] The left cover assembly, the right cover assembly and the lock nut are sealed by O-rings.

[0008] The right side cover assembly and the steering arm shaft are sealed by a high-pressure sealing ring, a retaining ring and an O-ring.

[0009] The positive effects of the present invention are: The present invention eliminates the traditional bulky single-side cover and replaces it with a compact left cover assembly and a right cover assembly, which are all assembled inside the housing assembly and do not exceed the housing assembly in space, so that the spatial size of the steering gear assembly is significantly reduced, solving the problem of large spatial dimensions of the traditional single-side cover hydraulic power-assisted circulating ball steering gear; by rotating the locking nut during assembly to control the gap between the steering arm shaft and other parts, the adjustment bolts, the housing side cover connecting bolts and the dust seal / dust cover and other protective parts are eliminated, reducing the product procurement and production costs. The new double-side cover hydraulic power-assisted circulating ball steering gear assembly can significantly reduce the external structure, adjustment bolts, housing side cover connecting bolts and dust seal / dust cover without changing the output torque, which is very advantageous for the current compact design of automobile space, and has a significant effect on exerting the power of the automobile, improving the loading capacity, reducing fuel consumption, and reducing exhaust pollution. More importantly, it can reduce the cost of the steering gear without reducing the performance and safety of the steering gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the axial structure of the present invention; Figure 3 This is the structural diagram of the left cover assembly; Figure 4 This is the structural diagram of the right side cover assembly.

[0011] Figure 1 , Figure 2 , Figure 3 and Figure 4 In: 1. Housing assembly, 2. Steel ball Ⅰ, 3. Steering nut assembly, 4. Bolt, 5. Valve body assembly, 6. Outer ring, 7. Steel ball Ⅱ, 8. Steering screw assembly, 9. Steering arm shaft, 10. O-ring Ⅰ, 11. Lock nut, 12. Left cover assembly, 13. Friction reducing pad, 14. Right cover assembly, 15. O-ring Ⅱ, 16. Roller, 17. High-pressure sealing ring, 18. Retaining ring, 19. O-ring Ⅲ. DETAILED DESCRIPTION

[0012] The present invention will be further described below in conjunction with the accompanying drawings.

[0013] See also Figure 1-4The new double-side cover hydraulic power-assisted circulating ball steering gear assembly is mainly composed of a housing assembly 1, a steel ball Ⅰ2, a steering nut assembly 3, a bolt 4, a valve body assembly 5, an outer ring 6, a steel ball Ⅱ7, a steering screw assembly 8, a steering arm shaft 9, an O-ring Ⅰ10, a locking nut 11, a left cover assembly 12, a friction-reducing pad 13 and a right cover assembly 14. The valve body assembly 5 is fixed to the housing assembly 1 by bolts 4, the steering nut assembly 3 and the steering screw assembly 8 are matched to form a roller screw pair through the steel ball Ⅰ2, the steering screw assembly 8 and the valve body assembly 5 are limited by an angular contact ball bearing composed of an outer ring 6 and a steel ball Ⅱ7, the teeth of the steering nut assembly 3 and the steering arm shaft 9 are meshed to form a rack-gear transmission pair, the friction-reducing pad 13, the left cover assembly 12 and the right cover assembly 14 are assembled on the steering arm shaft 9 and installed in the housing assembly 1. The locking nut 11 is fixed in the housing assembly 1 by threads, and axially limits the friction reducing pad 13, the left cover assembly 12, the right cover assembly 14 and the steering arm shaft 9. The left cover assembly 12, the right cover assembly 14 and the housing assembly 1 are sealed by an O-ring I 10. The left cover assembly 12, the right cover assembly 14 and the locking nut 11 are sealed by an O-ring II 15. The right cover assembly 14 and the steering arm shaft 9 are sealed by a high-pressure sealing ring 17, a retaining ring 18 and an O-ring III 19.

[0014] This structural design adopts hydraulic power assistance, with the steering arm shaft 9 as the output unit, and the steering screw assembly 8 as the hydraulic control valve, and controls the flow of hydraulic oil through the internal oil circuit. The steering nut assembly 3 and the steering screw assembly 8 form a roller screw pair through the steel ball Ⅰ2. The teeth of the steering nut assembly 3 and the steering arm shaft 9 are meshed to form a rack-pinion transmission pair. The rack-pinion transmission pair rotates, pulling the rod system connected to the output end of the vehicle and the steering gear to move, thereby driving the wheel to steer.

Claims

1. A new type of double-side cover hydraulic power-assisted circulating ball steering gear assembly, including a housing assembly, a steel ball, a steering nut assembly, a bolt, a valve body assembly, an outer ring, a steering screw assembly, a steering arm shaft, an O-ring, and a locking nut, characterized in that: The steering screw assembly serves as a hydraulic control valve to control the flow of hydraulic oil; the steering nut assembly and the steering screw assembly form a roller screw pair through steel ball I, the steering screw assembly and the valve body assembly are limited by an angular contact ball bearing composed of an outer ring and steel ball II, and the teeth on both sides of the steering nut assembly and the steering arm shaft are meshed to form a rack-pinion transmission pair; the left and right side cover assemblies are fixed to the steering arm shaft through locking nuts, and a friction-reducing pad is provided between the left and right side cover assemblies and the steering arm shaft, which is axially limited by the locking nut inserted therein, and the steering arm shaft is assembled in the housing assembly.

2. According to claim 1, the novel double-side cover hydraulic power-assisted circulating ball steering gear assembly is characterized in that: The left cover assembly, the right cover assembly and the housing assembly are sealed by O-rings.

3. According to claim 2, the novel double-side cover hydraulic power-assisted circulating ball steering gear assembly is characterized in that: The left cover assembly, the right cover assembly and the lock nut are sealed by O-rings.

4. A novel double-side cover hydraulic power-assisted circulating ball steering gear assembly according to claims 1-3, characterized in that: The right side cover assembly and the steering arm shaft are sealed by a high-pressure sealing ring, a retaining ring and an O-ring.

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