An improved valve sleeve structure for a low-noise fully hydraulic steering system

Abstract

This utility model discloses an improved valve sleeve structure for a low-noise fully hydraulic steering gear, comprising a valve core and a valve sleeve connected to each other; the valve sleeve has an annular opening and a slender groove; the valve core adopts a segmented arc structure on its circumference. This utility model features simple structure, small size, strong practicality, and stable quality and performance, improving the steering efficiency and performance of the hydraulic steering gear, reducing noise, and extending its overall lifespan.

Description

Technical Field

[0001] This utility model relates to the field of fully hydraulic steering systems, and in particular to an improved valve sleeve structure for a low-noise fully hydraulic steering system. Background Technology

[0002] In the entire hydraulic steering system, the precision of the two key components, valve core and valve sleeve, has always been a matter of concern within the industry. The inner hole of the valve sleeve requires honing or grinding, while the outer circle of the valve core is centerless ground or double-topped outer circle ground. The fit clearance between the two is between 0.007 and 0.011. However, simply meeting this requirement is far from sufficient to meet market demands. This is because, while ensuring a relative seal between the two components, it is also necessary to prevent hydraulic oil from generating fluid impact during hydraulic steering, which often produces noise and reduces the lifespan of the entire machine.

[0003] Therefore, it is necessary to develop new valve sleeve improvement structures to overcome the above problems. Utility Model Content

[0004] Purpose of the utility model: In view of the shortcomings and defects of the existing technology, this utility model provides an improved valve sleeve structure for a low-noise fully hydraulic steering gear. It features simple structure, small size, strong practicality, and stable quality and performance, thereby improving the steering efficiency of the hydraulic steering gear, enhancing steering performance, reducing noise, and extending the overall service life.

[0005] Technical solution: The present invention relates to an improved valve sleeve structure for a low-noise fully hydraulic steering gear, characterized in that: it includes a valve core and a valve sleeve connected to each other; the valve sleeve has an annular opening and a slender groove; the valve core has a segmented arc structure on its circumference.

[0006] The valve core is located inside the valve sleeve.

[0007] The elongated groove is formed in the inner hole of the valve sleeve.

[0008] The width of the elongated groove is 0.7 mm.

[0009] The valve core is a circumferentially distributed arc structure.

[0010] The valve sleeve employs a progressive throttling structure.

[0011] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention has the characteristics of simple structure, small size, strong practicality and stable quality performance, improves the reversing efficiency of hydraulic steering gear, improves steering performance, reduces noise and extends the overall service life. Attached Figure Description

[0012] Figure 1This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention;

[0014] Figure 3 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 4 This is a schematic diagram of the valve sleeve of this utility model;

[0016] Figure 5 This is a schematic diagram of the valve core structure of this utility model;

[0017] Figure 6 This is a schematic diagram of the cross-sectional structure of the valve core of this utility model;

[0018] In the diagram, 1 represents the valve core; 2 represents the valve sleeve. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] This utility model discloses an improved valve sleeve structure for a low-noise fully hydraulic steering gear, comprising a valve core 1 and a valve sleeve 2 connected to each other. The valve sleeve 2 has an annular opening and a long, narrow groove. The valve core 1 has a segmented arc structure on its circumference. The valve core 1 is located inside the valve sleeve 2. The long, narrow groove is formed in the inner hole of the valve sleeve 2. The width of the long, narrow groove is 0.7 mm. The valve core 1 has a uniformly distributed arc structure on its circumference. The valve sleeve 2 employs a progressively throttling structure.

[0021] This invention, based on the original steering gear's valve core and valve sleeve assembly, employs an annular opening on the valve sleeve to increase flow rate, gradually throttling it into a slender groove. The valve core utilizes a segmented arc structure distributed circumferentially, achieving the same effect of gradually releasing flow rate during steering. The key improvements are the machining of a 0.7mm slender groove in the valve sleeve's inner bore and the evenly distributed arc structure on the circumference of the valve core.

[0022] The combination of these two components results in a significant performance improvement: both the valve core and valve sleeve feature unique designs. The valve sleeve provides gradual throttling, eliminating hydraulic shock and enhancing steering feel. The valve core has a rounded distribution, ensuring a smooth and noiseless flow of fluid. Both components offer a smooth transition in steering feel throughout the entire process, thus avoiding additional pressure and addressing the issue of heavy steering.

[0023] This improved valve sleeve structure for a low-noise, fully hydraulic steering gear is primarily based on its proportional throttling characteristics, resulting in a relatively stable flow rate. Its advantages include stable performance, zero noise, and no issues with steering feel such as heavy steering, while also addressing the efficiency problem of hydraulic steering. This invention features a simple structure, small size, high practicality, and stable quality and performance, improving the reversing efficiency of the hydraulic steering gear, enhancing steering performance, reducing noise, and extending its overall lifespan.

Claims

1. An improved valve sleeve structure for a low-noise fully hydraulic steering gear, characterized in that: It includes a valve core (1) and a valve sleeve (2) connected to each other; the valve sleeve (2) has an annular opening and a long, narrow groove; the valve core (1) has a segmented arc structure on the circumference; the valve core (1) is located inside the valve sleeve (2); the long, narrow groove is opened in the inner hole of the valve sleeve (2); the width of the long, narrow groove is 0.7 mm; the valve core (1) has a uniformly distributed arc structure on the circumference; the valve sleeve (2) has a gradually throttling structure.

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