Steering control valve capable of being quickly disassembled and conveniently maintained

Abstract

The steering control valve comprises a steering screw rod, a valve body and an input shaft, and is characterized in that the right side end of the steering screw rod protrudes outwards along the circumference, an arc contact face is arranged at the right side end of the protruding position, the right side end of the steering screw rod is arranged in the valve body, and the right side end of the steering screw rod is connected with the valve body. The right side end of the valve body is in threaded connection with an upper cover, the input shaft is rotatably connected in the steering screw and the upper cover, the right side end of the upper cover is further in threaded connection with a locknut, a torsion bar is fixed to the left side end of the input shaft, the left side end of the steering screw is connected with a cylindrical pin, and the cylindrical pin penetrates through the steering screw and then is relatively and fixedly connected with the torsion bar. When a predelivery test is not qualified or a fault occurs after sale, disassembly and maintenance are more convenient and faster, and the novel high-voltage switch cabinet is firmer and more durable.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic steering systems, in particular to a steering control valve which can be quickly disassembled and easily maintained, and is used for a steering control valve of a steering gear. Background Art

[0002] There are various types of steering control valves, such as one-way valves, hydraulic one-way valves, reversing valves, travel deceleration valves, filling valves, shuttle valves, etc. The force-balanced steering control valves on the market generally use adjusting nuts to adjust the gap, and the adjusting nuts or gaskets are inside the steering gear housing. Therefore, a steering control valve with patent number CN201920946962.4 has appeared on the market. Its adjusting gasket is located between the valve cover and the valve body, and the valve body and the valve cover are connected to each other. When the power steering assembly fails the factory test or fails after sales, it is necessary to unscrew the valve cover first and then use other tools to take out the adjusting gasket. It is impossible to achieve quick disassembly and assembly, and the valve cover and the valve body are only threadedly connected, without a locking mechanism, which will cause safety hazards after long-term use. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a steering control valve which can be quickly disassembled and easily repaired. When the steering control valve fails the factory test or has a fault after sale, the valve can be disassembled and repaired more conveniently and quickly and is more firm and durable.

[0004] In order to solve the above problems, the utility model adopts the following technical solutions:

[0005] A steering control valve that can be quickly disassembled for easy maintenance comprises a steering screw, a valve body and an input shaft, wherein the right end of the steering screw protrudes outward along the circumference, and a circular arc contact surface is provided on the right end of the protrusion, the right end of the steering screw is built into the valve body, and an upper cover is threadedly connected to the right end of the valve body, the input shaft is rotatably connected to the steering screw and the upper cover, and a locking nut is also threadedly connected to the right end of the upper cover, a torsion bar is fixed to the left end of the input shaft, and a cylindrical pin is connected to the left end of the steering screw, and the cylindrical pin penetrates the steering screw and is relatively fixedly connected to the torsion bar.

[0006] A further technical solution is that a lower sealing ring, a thrust bearing gasket, a flat thrust bearing with a retainer, a middle sealing ring, a thrust ball bearing with a retainer, and a thrust ball bearing gasket are placed between the steering screw and the valve body. They are conventional seals and bearing components, which are connected through a transmission support of the thrust ball bearing with a retainer and the thrust ball bearing gasket, effectively reducing the wear on the upper cover and ensuring the accuracy of the upper cover for adjusting the steering valve and the parameters of the entire machine.

[0007] A further technical solution is that the thrust ball bearing with a retaining frame is circumferentially close to the arc contact surface at the right end of the steering screw. Since the thrust ball in the thrust ball bearing is round, it contacts the arc contact surface at the right end of the steering screw, thereby achieving a load-bearing effect when the steering screw rotates.

[0008] A further technical solution is that an O-ring 1 is placed between the steering screw and the valve body and on one side of the lower sealing ring, and an O-ring 2 is placed between the steering screw and the valve body and on one side of the middle sealing ring, which play a good sealing and gasket role.

[0009] A further technical solution is that an upper sealing ring and an O-ring three are placed between the steering screw and the upper cover to play a good sealing and gasket role.

[0010] A further technical solution is that an O-ring 4 is placed between the upper cover and the steering screw to perform a good sealing and gasket role.

[0011] A further technical solution is that a dust seal and an oil seal are placed between the input shaft and the upper cover to achieve a better sealing and dustproof effect.

[0012] A further technical solution is that a needle bearing, an O-ring five and a shaft sealing ring are provided between the input shaft and the steering screw. The O-ring five and the shaft sealing ring play a sealing role, and the needle bearing realizes a rotatable connection between the input shaft and the steering screw.

[0013] A further technical solution is that an O-ring 6 is placed on the outer circumferential side of the valve body to play a good sealing and gasket role.

[0014] The beneficial effects of the utility model are as follows: the utility model is a steering control valve which can be quickly disassembled and easily maintained, the right side end of the valve body being threadedly connected to an upper cover, and the right side end of the upper cover being also threadedly connected to a loosening nut, the valve body being locked and fixed by tightening the loosening nut and contacting with the right side end face of the valve body, making the locking more firm and durable, and a quick disassembly and installation structure being realized by loosening and tightening the loosening nut and the upper cover, the entire disassembly and installation structure being located at the steering screw and the right side end of the valve body, making disassembly and assembly more convenient, without the need to use other tools, the steering control valve can be suitable for vehicles with steering systems having a pressure of more than 17MPa, and is convenient for the return inspection and repair of a steering gear assembly that fails the factory test or fails after sales. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a structural schematic diagram of a steering control valve that can be quickly disassembled and easily maintained according to the utility model;

[0017] Figure 2 This is a cross-sectional view of a steering screw in a steering control valve that can be quickly disassembled for easy maintenance according to the utility model;

[0018] Figure 3 This is a cross-sectional view of an upper cover in a steering control valve that can be quickly disassembled for easy maintenance according to the utility model;

[0019] Figure 4 The utility model is a cross-sectional view of a valve body in a steering control valve which can be quickly disassembled for convenient maintenance.

[0020] Figure 1-4 In: 1-steering screw, 2-lower sealing ring, 3-O-ring one, 4-thrust bearing gasket, 5-flat thrust bearing with cage, 6-middle sealing ring, 7-O-ring two, 8-thrust ball bearing with cage, 9-thrust ball bearing gasket, 10-upper sealing ring, 11-O-ring three, 12-O-ring four, 13-upper cover, 14-locking nut, 15-input shaft, 16-dust seal, 17-oil seal, 18-needle bearing, 19-O-ring five, 20-shaft sealing ring, 21-O-ring six, 22-valve body, 23-torsion bar, 24-cylindrical pin, 25-arc contact surface. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0022] See also Figures 1 to 4As shown, a steering control valve that can be quickly disassembled for easy maintenance includes a steering screw 1, a valve body 22 and an input shaft 15. The right end of the steering screw 1 protrudes outward along the circumference, and a circular arc contact surface 25 is provided on the right end of the protrusion. The right end of the steering screw 1 is built into the valve body 22, and the right end of the valve body 22 is threadedly connected to an upper cover 13. The input shaft 15 is rotatably connected to the steering screw 1 and the upper cover 13. The right end of the upper cover 13 is also threadedly connected to a locking nut 14. A torsion bar 23 is fixed to the left end of the input shaft 15, and a cylindrical pin 24 is connected to the left end of the steering screw 1. The cylindrical pin 24 penetrates the steering screw 1 and is relatively fixedly connected to the torsion bar 23.

[0023] A lower sealing ring 2, a thrust bearing gasket 4, a plane thrust bearing with a cage 5, a middle sealing ring 6, a thrust ball bearing with a cage 8, and a thrust ball bearing gasket 9 are also placed between the steering screw 1 and the valve body 22. They are conventional sealing and bearing parts. The thrust ball bearing 8 with a cage and the thrust ball bearing gasket 9 are connected by transmission support, which effectively reduces the wear on the upper cover 13 and ensures the accuracy of the upper cover 13 for adjusting the steering valve and the parameters of the whole machine. The thrust ball bearing 8 with a cage is closely attached to the arc contact surface 25 at the right end of the steering screw 1 along the circumference. Since the thrust ball in the thrust ball bearing 8 is round, it contacts the arc contact surface 25 at the right end of the steering screw 1, so that the steering screw 1 can play a bearing effect when rotating. An O-ring 1 3 is placed between the steering screw 1 and the valve body 22 and on one side of the lower sealing ring 2. An O-ring 2 7 is placed between the steering screw 1 and the valve body 22 and on one side of the middle sealing ring 6, which play a good role of sealing and gasket. An upper sealing ring 10 and an O-ring 3 11 are placed between the steering screw 1 and the upper cover 13, which play a good role of sealing and gasket. An O-ring 4 12 is placed between the upper cover 13 and the steering screw 1, which play a good role of sealing and gasket. A dust seal 16 and an oil seal 17 are placed between the input shaft 15 and the upper cover 13, which play a better sealing and dustproof effect. A needle bearing 18, an O-ring 5 19 and a shaft sealing ring 20 are also provided between the input shaft 15 and the steering screw 1. The O-ring 5 19 and the shaft sealing ring 20 play a sealing role, and the needle bearing 18 realizes a rotatable connection between the input shaft 15 and the steering screw 1. An O-ring 6 21 is also placed on the outer circumference of the valve body 22 to provide a good seal and gasket effect.

[0024] In this embodiment, during installation, the input shaft 15 is first installed into the right side end of the steering screw 1, and then the steering screw 1 is passed through the valve body 22, so that the circumferential protrusion of the steering screw 1 is against the inner wall of the left side end of the valve body 22, and then the upper cover 13 is screwed on the right side end of the valve body 22 through threads, so that the thrust ball bearing 8 is closely abutted against the arc contact surface 25 of the right side end of the steering screw 1 along the circumference. After tightening, there is still a small section of the right side end of the upper cover 13, and the anti-loosening nut 14 is used to tighten it again to lock the entire upper cover 13. During operation, the input shaft 15 starts to drive the torsion bar 23 on the left side end of the input shaft 15 to rotate together. The torsion bar 23 is relatively fixedly connected to the left side end of the steering screw 1 through the cylindrical pin 24, thereby driving the steering screw 1 to rotate, and the steering screw 1 realizes the rotation of the right side end of the steering screw 1 in the valve body 22 and the upper cover 13 through the plane thrust bearing 5 with a retainer and the thrust ball bearing 8 with a retainer.

[0025] When the factory test fails or a fault occurs after sale, it is only necessary to unscrew the anti-loosening nut 14 and then unscrew the upper cover 13, so that the steering screw 1 together with the input shaft 15 can be taken out to replace the internal parts, making disassembly and maintenance more convenient and quick.

[0026] The above is only a specific implementation of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present utility model.

Claims

1. A steering control valve that can be quickly disassembled and easily maintained, comprising a steering screw, a valve body and an input shaft, characterized in that: The right end of the steering screw protrudes outward along the circumference, and an arc contact surface is provided on the right end of the protrusion. The right end of the steering screw is built into the valve body, and the right end of the valve body is threadedly connected to an upper cover. The input shaft is rotatably connected in the steering screw and the upper cover, and a lock nut is also threadedly connected to the right end of the upper cover. A torsion bar is fixed to the left end of the input shaft, and a cylindrical pin is connected to the left end of the steering screw, and the cylindrical pin passes through the steering screw and is relatively fixedly connected to the torsion bar.

2. A steering control valve for quick disassembly and easy maintenance according to claim 1, characterized in that: A lower sealing ring, a thrust bearing gasket, a plane thrust bearing with a retainer, a middle sealing ring, a thrust ball bearing with a retainer, and a thrust ball bearing gasket are also placed between the steering screw and the valve body.

3. The steering control valve for quick disassembly and easy maintenance according to claim 2, characterized in that: The thrust ball bearing with a retainer is closely attached to the arc contact surface of the right end of the steering screw along the circumference.

4. The steering control valve for quick disassembly and easy maintenance according to claim 1, characterized in that: An O-ring 1 is placed between the steering screw and the valve body and on one side of the lower sealing ring, and an O-ring 2 is placed between the steering screw and the valve body and on one side of the middle sealing ring.

5. The steering control valve for quick disassembly and easy maintenance according to claim 1, characterized in that: An upper sealing ring and an O-ring three are also placed between the steering screw and the upper cover.

6. The steering control valve for quick disassembly and easy maintenance according to claim 1, characterized in that: An O-ring four is also placed between the upper cover and the steering screw.

7. The steering control valve for quick disassembly and easy maintenance according to claim 1, characterized in that: A dust seal and an oil seal are also placed between the input shaft and the upper cover.

8. The steering control valve for quick disassembly and easy maintenance according to claim 1, characterized in that: A needle bearing, an O-ring and a shaft sealing ring are also arranged between the input shaft and the steering screw.

9. The steering control valve for quick disassembly and easy maintenance according to claim 1, characterized in that: An O-ring 6 is also placed on the outer circumferential side of the valve body.

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