Steering gear with wide turning angle

Abstract

The utility model relates to the technical field of steering gears, in particular to a wide-turning-angle steering gear which comprises a valve body, a valve element is arranged in the valve body, a valve sleeve is arranged in the valve element, a torsion spring body is installed on the outer wall of the valve element, a rotor is arranged in the valve body, a stator body is installed in the valve body, and a stator is installed in the stator body. An oil inlet is formed in the valve body, a filtering assembly is arranged in the oil inlet, a working groove communicated with the valve element is formed in the valve body, a first oil opening and a second oil opening are formed in the valve sleeve, and an oil return groove is formed in the inner wall of the valve body. Firstly, the torsion spring body is the cylindrical spiral torsion spring, the free turning angle is increased to 90 degrees, the flow speed is reduced, hydraulic flow impact vibration is greatly reduced, 1 / 2 of flow impact can be reduced to the maximum extent, meanwhile, a buffer valve, a shock absorber and an energy accumulator of a steering system can be omitted through the technology, and cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of steering gear technology, and in particular to a wide-angle steering gear. Background Technology

[0002] Hydraulic steering systems are non-road vehicle steering systems that can be used in construction machinery such as transfer machines, excavators, and mining trucks with speeds below 60 km / h.

[0003] Most ordinary full hydraulic steering systems on the market currently use leaf springs, with the valve core having a small free rotation angle relative to the valve sleeve, only about 20°. This type of steering system has a small opening degree and high flow rate in each part of the valve core and valve sleeve, resulting in sudden hydraulic oil supply and sensitive steering. However, it is prone to shock vibration in the steering mechanism, which can easily cause driver fatigue. In addition, there is no hydraulic oil filtration device, which leads to impurities in the hydraulic oil, thus affecting the service life of the steering system. Therefore, a steering system with a wide rotation angle is needed to meet people's needs. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] Given that most common fully hydraulic steering systems on the market currently use leaf springs and have a small free rotation angle relative to the valve sleeve (only 20°), the opening of each component of the valve core and valve sleeve is small, the flow rate is high, the hydraulic oil supply is sudden, the steering is sensitive, but it is easy to cause impact vibration of the steering mechanism, and the driver is prone to fatigue. At the same time, there is no hydraulic oil filtering device, which leads to impurities in the hydraulic oil, thus affecting the service life of the steering system. Therefore, a steering system with a wide rotation angle is needed to meet people's needs.

[0006] Therefore, the purpose of this invention is to provide a steering gear with a wide turning angle.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a wide-angle steering gear, including a valve body, a valve core is provided inside the valve body, and a valve sleeve is provided inside the valve core. A torsion spring body is installed on the outer wall of the valve core. A rotor is provided inside the valve body. A stator body is installed inside the valve body. An oil inlet is provided inside the valve body, and a filter assembly is provided inside the oil inlet. A working groove communicating with the valve core is provided inside the valve body. A first oil port and a second oil port are provided inside the valve sleeve. An oil return groove is provided on the inner wall of the valve body.

[0008] In a preferred embodiment of the wide-angle steering gear of this utility model, the first oil port and the second oil port are staggered in the circumferential direction, so that either the first oil port or the second oil port can cooperate with the working groove to form a working valve port, and the other can cooperate with the return oil groove to form a return oil valve port.

[0009] As a preferred embodiment of the wide-angle steering gear of this utility model, the torsion spring body is a cylindrical helical torsion spring, which can increase the free turning angle to 90°.

[0010] As a preferred embodiment of the wide-angle steering gear of this utility model, the filter assembly includes a mounting plate, one end of which is fitted with a filter tube, and the filter tube is threadedly connected to the oil inlet. The outer wall of the filter tube is fitted with external threads, and the inner wall of the filter tube is fitted with baffles.

[0011] As a preferred embodiment of the wide-angle steering gear of this utility model, the filter tube is provided with a first disc inside, and a connecting rod is installed on the side wall of one end of the first disc. A second disc is installed at the end of the connecting rod away from the first disc. Filter screens are installed inside both the second disc and the first disc. The second disc cooperates with the baffle.

[0012] In a preferred embodiment of the wide-angle steering gear of this utility model, the outer wall of the filter tube is fitted with an installation ring, and the inner wall of the installation ring is fitted with an internal thread, wherein the internal thread is threadedly connected to the external thread.

[0013] In a preferred embodiment of the wide-angle steering system of this utility model, a sealing gasket is installed on the inner wall of the mounting plate.

[0014] The wide-angle steering gear of this utility model has the following beneficial effects:

[0015] This invention firstly improves upon the design of the torsion spring body by using a cylindrical helical torsion spring, which allows for a free rotation angle of up to 90°, thereby reducing the flow velocity and significantly decreasing hydraulic flow impact vibration. This can reduce flow impact by up to 1 / 2. Furthermore, this technology eliminates the need for a steering system buffer valve, shock absorber, and accumulator, saving costs.

[0016] This invention firstly utilizes the design of a filter assembly and a filter screen to filter impurities in hydraulic oil, thus preventing impurities from entering and affecting the service life of the hydraulic oil. Simultaneously, a second disc cooperates with a baffle and is connected by internal and external threads, allowing the second disc to be inserted into the filter tube through the baffle. The first and second discs are installed and removed via an installation ring connected to the external thread, facilitating cleaning of the filter screen and improving its filtration efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0018] Figure 1 This is a schematic diagram of the main structure of a wide-angle steering gear;

[0019] Figure 2 A cross-sectional view of a wide-angle steering gear;

[0020] Figure 3 A schematic diagram showing the disassembled structure of the filter assembly of a wide-angle steering gear;

[0021] Figure 4 A schematic diagram of a cylindrical helical torsion spring structure for a wide-angle steering gear;

[0022] Figure 5 This is a schematic diagram of the main view filter assembly structure of a wide-angle steering gear;

[0023] Figure 6 This is a schematic diagram of the left-side structure of a wide-angle steering gear.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Valve body; 101. Oil inlet; 102. Working groove; 103. First oil port; 104. Second oil port; 105. Return oil groove; 2. Valve core; 3. Valve sleeve; 4. Cylindrical helical torsion spring; 5. Rotor; 6. Stator body; 7. Filter assembly; 701. Mounting plate; 7011. Sealing gasket; 702. Baffle; 703. Filter tube; 704. External thread; 705. First disc; 706. Connecting rod; 707. Second disc; 708. Filter screen; 709. Mounting ring; 7091. Internal thread. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0029] Example 1: Refer to Figures 1-6 This is the first embodiment of the present invention, which provides a wide-angle steering gear. It can achieve the characteristics of most common fully hydraulic steering gears currently on the market. These gears use leaf springs, and the valve core has a small free rotation angle relative to the valve sleeve, only about 20°. Such steering gears have small openings in the valve core and valve sleeve, high flow rates, sudden hydraulic oil supply, and sensitive steering, but are prone to shock vibrations in the steering mechanism, leading to driver fatigue. Furthermore, the lack of a hydraulic oil filter results in impurities in the hydraulic oil, affecting the service life of the steering gear. Therefore, a wide-angle steering gear is needed. The steering gear is designed to meet people's usage needs. It includes a valve body 1, a valve core 2 inside the valve body 1, a valve sleeve 3 inside the valve core 2, a torsion spring body 4 installed on the outer wall of the valve core 2, a rotor 5 inside the valve body 1, a stator body 6 inside the valve body 1, an oil inlet 101 inside the valve body 1, a filter assembly 7 inside the oil inlet 101, a working groove 102 connected to the valve core 2 inside the valve body 1, a first oil port 103 and a second oil port 104 inside the valve sleeve 3, and an oil return groove 105 on the inner wall of the valve body 1.

[0030] The first oil port 103 and the second oil port 104 are staggered in the circumferential direction, so that either the first oil port 103 or the second oil port 104 can cooperate with the working groove 102 to form a working valve port, and the other can cooperate with the return oil groove 105 to form a return oil valve port.

[0031] The main body 4 of the torsion spring is a cylindrical helical torsion spring, which can increase the free rotation angle to 90°.

[0032] The specific working principle is as follows: First, through the design of the torsion spring body 4, and by making the torsion spring body 4 a cylindrical helical torsion spring, the free rotation angle can be increased to 90°, the flow rate is reduced, and the hydraulic flow impact vibration is greatly reduced, which can reduce the flow impact by up to 1 / 2. At the same time, by adopting this technology, the steering system buffer valve, shock absorber and accumulator can be eliminated, saving costs.

[0033] Example 2: Refer to Figures 1-6 This is the first embodiment of the present invention. This embodiment provides a wide-angle steering gear, which can achieve the characteristics of most common fully hydraulic steering gears on the market. These steering gears use leaf springs, and the valve core has a small free rotation angle relative to the valve sleeve, with a small free rotation angle range of only 20°. In this type of steering gear, the opening degree of each link of the valve core and valve sleeve is small, the flow rate is high, the hydraulic oil supply is sudden, the steering is sensitive, and it is easy to cause impact vibration of the steering mechanism, which can easily cause driver fatigue. At the same time, there is no hydraulic oil filtration device, which leads to impurities in the hydraulic oil, thus affecting the service life of the steering gear. Therefore, a wide-angle steering gear is needed to meet people's needs. The filter assembly 7 includes a mounting plate 701, and a filter tube 703 is installed at one end of the mounting plate 701. The filter tube 703 is threaded to the oil inlet 101. The outer wall of the filter tube 703 is installed with external threads 704, and the inner wall of the filter tube 703 is installed with baffles 702.

[0034] The filter tube 703 has a first disc 705 inside, and a connecting rod 706 is installed on the side wall of one end of the first disc 705. A second disc 707 is installed on the end of the connecting rod 706 away from the first disc 705. Filter screens 708 are installed inside both the second disc 707 and the first disc 705. The second disc 707 cooperates with the baffle 702. The outer wall of the filter tube 703 is fitted with an installation ring 709, and the inner wall of the installation ring 709 is fitted with an internal thread 7091. The internal thread 7091 is threadedly connected to the external thread 704. A sealing gasket 7011 is installed on the inner wall of the installation disc 701.

[0035] The specific working principle is as follows: First, the filter assembly 7 is threadedly connected to the oil inlet 101 via the external thread 704, facilitating the installation and disassembly of the filter assembly 7 by the operator. Simultaneously, the design of the filter assembly 7 and the filter screen 708 allows for the filtration of impurities in the hydraulic oil, preventing impurities from entering and affecting its service life. Furthermore, the second disc 707 cooperates with the baffle 702 and is threadedly connected to the external thread 704 via the internal thread 7091, allowing the second disc 707 to be inserted into the filter tube 703 through the baffle 702. The first disc 705 and the second disc 707 are then installed and disassembled via the mounting ring 709 threaded to the external thread 704, facilitating the cleaning of the filter screen 708 and improving its filtration efficiency.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steering gear with a wide steering angle, characterized in that: The valve body (1) includes a valve core (2) inside the valve body (1) and a valve sleeve (3) inside the valve core (2). A torsion spring body (4) is installed on the outer wall of the valve core (2). A rotor (5) is installed inside the valve body (1). A stator body (6) is installed inside the valve body (1). An oil inlet (101) is opened inside the valve body (1), and a filter assembly (7) is installed inside the oil inlet (101). A working groove (102) communicating with the valve core (2) is opened inside the valve body (1). A first oil port (103) and a second oil port (104) are provided inside the valve sleeve (3). A return oil groove (105) is provided on the inner wall of the valve body (1).

2. A wide-angle steering gear as described in claim 1, characterized in that: The first oil port (103) and the second oil port (104) are staggered in the circumferential direction so that either the first oil port (103) or the second oil port (104) can cooperate with the working groove (102) to form a working valve port, and the other can cooperate with the return oil groove (105) to form a return oil valve port.

3. A wide-angle steering gear as described in claim 1, characterized in that: The main body (4) of the torsion spring is a cylindrical helical torsion spring, which can increase the free rotation angle to 90°.

4. A wide-angle steering gear as described in claim 1, characterized in that: The filter assembly (7) includes a mounting plate (701), one end of which is fitted with a filter tube (703), and the filter tube (703) is threadedly connected to the oil inlet (101). The outer wall of the filter tube (703) is fitted with an external thread (704), and the inner wall of the filter tube (703) is fitted with a baffle (702).

5. A wide-angle steering gear as described in claim 4, characterized in that: The filter tube (703) is provided with a first disc (705) inside, and a connecting rod (706) is installed on the side wall of one end of the first disc (705). A second disc (707) is installed at the end of the connecting rod (706) away from the first disc (705). A filter screen (708) is installed inside both the second disc (707) and the first disc (705). The second disc (707) cooperates with the baffle (702).

6. A wide-angle steering gear as described in claim 4, characterized in that: The outer wall of the filter tube (703) is fitted with an installation ring (709), and the inner wall of the installation ring (709) is fitted with an internal thread (7091), which is threadedly connected to the external thread (704).

7. A wide-angle steering gear as described in claim 4, characterized in that: A sealing gasket (7011) is installed on the inner wall of the mounting plate (701).

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