Compact full-hydraulic steering gear with pressure-adjustable safety valve

Abstract

The utility model relates to the technical field of full-hydraulic steering gears, in particular to a compact full-hydraulic steering gear with a pressure-adjustable safety valve, which comprises a full-hydraulic steering gear main body, a valve sleeve main body is arranged in the full-hydraulic steering gear main body, and a steering rod main body is mounted in the valve sleeve main body. A mounting cover main body is arranged at one end of the full-hydraulic steering gear main body, a bolt main body which is in bolt mounting with the full-hydraulic steering gear main body is mounted in the mounting cover main body, and a safety valve pressure bin is formed in the full-hydraulic steering gear main body. Firstly, a piston rod is extruded to drive a piston plate to slide in a first hydraulic oil cylinder, and a hydraulic oil body enters a second hydraulic oil cylinder to extrude a third high-pressure spring body to deform, so that a sealing block can ascend and descend in a first pressure relief hole; therefore, the pressure is relieved through the first pressure relief hole and the second pressure relief hole.

Description

Technical Field

[0001] This utility model relates to the field of fully hydraulic steering technology, and in particular to a compact fully hydraulic steering system with adjustable safety valve pressure. Background Technology

[0002] A fully hydraulic steering system is a device that uses hydraulic oil as the power transmission medium. It is primarily used in the steering systems of automobiles and mainly consists of a hydraulic pump, hydraulic cylinders, hydraulic control valves, and an oil reservoir. Compared to traditional mechanical steering systems and electronic power steering systems, fully hydraulic steering systems offer higher transmission efficiency, lighter weight, and better handling stability. A fully hydraulic steering system with an adjustable safety valve pressure is a type of hydraulic steering system with an adjustable safety valve pressure function. It is mainly used in low-speed, heavy-duty vehicles such as construction machinery, mining machinery, and agricultural and forestry machinery. This type of steering system can adapt to different working conditions and load requirements by adjusting the safety valve pressure, thus improving the stability and reliability of the system.

[0003] Most compact full hydraulic steering systems with adjustable safety valve pressure on the market are prone to pressure build-up inside the safety valve during prolonged use. If this pressure is not released in time, the high internal pressure of the safety valve will affect the service life of the full hydraulic steering system. Therefore, a compact full hydraulic steering system with adjustable safety valve pressure is needed to meet people's usage 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 of the compact fully hydraulic steering gears on the market with adjustable safety valve pressure exist as described above or in the prior art, prolonged use can easily cause the internal pressure of the safety valve in the fully hydraulic steering gear to rise. If the pressure is not released in time, the high internal pressure of the safety valve will affect the service life of the fully hydraulic steering gear. Therefore, a compact fully hydraulic steering gear with adjustable safety valve pressure is needed to meet people's usage needs.

[0006] Therefore, the purpose of this invention is to provide a compact, fully hydraulic steering system with adjustable safety valve pressure.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a compact fully hydraulic steering gear with adjustable safety valve pressure, comprising a fully hydraulic steering gear body, a valve sleeve body inside the fully hydraulic steering gear body, and a steering rod body inside the valve sleeve body. One end of the fully hydraulic steering gear body is provided with a mounting cover body, and bolt bodies for bolting to the fully hydraulic steering gear body are installed inside the mounting cover body. A safety valve pressure chamber is opened inside the fully hydraulic steering gear body, and a pressure relief chamber is opened inside the fully hydraulic steering gear body. A first pressure relief hole is opened at the bottom of the pressure relief chamber, and the first pressure relief hole is connected to the safety valve pressure chamber. A second hydraulic cylinder is installed at the top inside the pressure relief chamber, an adjusting pressure relief block is provided inside the pressure relief chamber, and a hydraulic lifting assembly is installed at the top inside the pressure relief chamber.

[0008] As a preferred embodiment of the present invention, a compact fully hydraulic steering gear with adjustable safety valve pressure, wherein: the hydraulic lifting assembly includes a first hydraulic cylinder, the first hydraulic cylinder is fixedly installed at the top of the pressure relief chamber, the first hydraulic cylinder has a hydraulic oil body inside, a sealing plug body is provided at the bottom end of the first hydraulic cylinder, a first piston plate is provided inside the first hydraulic cylinder, and a piston rod penetrating the sealing plug body is installed at the bottom end of the first piston plate, and the bottom end of the piston rod is fixedly connected to the top end of the adjusting pressure relief block.

[0009] As a preferred embodiment of the present invention, a compact fully hydraulic steering gear with adjustable safety valve pressure, wherein: the interior of each of the second hydraulic cylinders is provided with a second piston plate, and a third high-pressure spring body is installed at one end of the second piston plate that is close to each other; and connecting pipes connected to the first hydraulic cylinder are installed on the side walls at both ends of the second hydraulic cylinder.

[0010] As a preferred embodiment of the present invention, a compact fully hydraulic steering gear with adjustable safety valve pressure is provided, wherein: a second pressure relief hole is provided at the top of the pressure relief chamber.

[0011] As a preferred embodiment of the present invention, a compact fully hydraulic steering gear with adjustable safety valve pressure, wherein: a sealing block is installed at the bottom end of the adjusting pressure relief block, and the sealing block cooperates with the first pressure relief hole; a second high-pressure spring body is installed at the top end of the sealing block, and the top end of the second high-pressure spring body is fixedly connected to the bottom end of the second hydraulic cylinder.

[0012] As a preferred embodiment of the present invention, a compact fully hydraulic steering gear with adjustable safety valve pressure, wherein: a sealing gasket is installed at the bottom end of the adjusting pressure relief block, and an arc-shaped sealing ring is installed at the bottom end of each sealing gasket.

[0013] As a preferred embodiment of the present invention, a compact fully hydraulic steering gear with adjustable safety valve pressure, wherein: the bottom of the pressure relief chamber is provided with a sealing groove, and the sealing groove and the arc-shaped sealing ring are mutually sealed.

[0014] The advantages of this compact, fully hydraulic steering system with adjustable safety valve pressure are as follows: Firstly, the design of the second and third high-pressure spring bodies allows the pressure inside the safety valve pressure chamber to compress the sealing block and deform the second high-pressure spring body when the pressure exceeds the deformation force it can withstand. Simultaneously, this pressure compresses the piston rod, causing a piston plate to slide inside the first hydraulic cylinder. Hydraulic oil then enters the second hydraulic cylinder, compressing the third high-pressure spring body and causing it to deform. This allows the sealing block to rise and fall within the first pressure relief hole, thereby releasing pressure through both the first and second pressure relief holes.

[0015] The advantages of this compact, fully hydraulic steering system with adjustable safety valve pressure are as follows: First, after the pressure inside the safety valve pressure chamber is released, the second and third high-pressure spring bodies elastically recover. The second high-pressure spring body drives the sealing block to seal with the first pressure relief hole. At the same time, the third high-pressure spring body elastically recovers and drives the second piston plate to squeeze the hydraulic oil inside the second hydraulic cylinder into the first hydraulic cylinder, and squeezes the piston rod to slide, thereby driving the sealing block to seal with the first pressure relief hole, thus improving the sealing effect. Attached Figure Description

[0016] 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:

[0017] Figure 1 This is a front view schematic diagram of a compact, fully hydraulic steering system with adjustable safety valve pressure.

[0018] Figure 2 This is a right-side structural schematic diagram of a compact, fully hydraulic steering system with adjustable safety valve pressure.

[0019] Figure 3 This is a schematic diagram of the internal structure of the safety valve pressure chamber of a compact, fully hydraulic steering gear with adjustable safety valve pressure.

[0020] Figure 4 A compact, fully hydraulic steering system with adjustable safety valve pressure. Figure 3 Enlarged structural diagram at point A in the middle.

[0021] Figure 5 This is a schematic diagram of the internal structure of the first hydraulic cylinder of a compact, fully hydraulic steering system with adjustable safety valve pressure.

[0022] Figure 6 This is a partial cross-sectional view of the safety valve pressure chamber of a compact, fully hydraulic steering gear with adjustable safety valve pressure.

[0023] Figure 7 This is a left-side structural schematic diagram of a compact, fully hydraulic steering system with adjustable safety valve pressure.

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

[0025] 1. Fully hydraulic steering gear body; 2. Valve sleeve body; 3. Steering rod body; 4. Mounting cover body; 5. Bolt body; 6. Safety valve pressure chamber; 7. Hydraulic lifting assembly; 701. First hydraulic cylinder; 702. First piston plate; 703. Sealing plug body; 704. Piston rod; 705. Hydraulic oil body; 8. Pressure relief chamber; 801. First pressure relief hole; 802. Sealing groove; 803. Second pressure relief hole; 804. Second hydraulic cylinder; 8041. Second piston plate; 8042. Third high-pressure spring body; 8043. Connecting pipe; 9. Adjustable pressure relief block; 901. Sealing block; 902. Second high-pressure spring body; 903. Arc-shaped sealing ring; 904. Sealing gasket. 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 1-7This is the first embodiment of the present invention, which provides a compact fully hydraulic steering gear with adjustable safety valve pressure. This embodiment addresses the common issue that most compact fully hydraulic steering gears with adjustable safety valve pressure on the market experience pressure build-up during prolonged use. If this pressure is not released promptly, the high internal pressure of the safety valve can negatively impact the lifespan of the fully hydraulic steering gear. Therefore, a compact fully hydraulic steering gear with adjustable safety valve pressure is needed to meet user needs. The first embodiment includes a fully hydraulic steering gear body 1, with a valve sleeve body 2 inside the body 1, and a steering rod installed inside the valve sleeve body 2. The main body 3, the full hydraulic steering gear main body 1, is provided with a mounting cover body 4 at one end, and the mounting cover body 4 is provided with bolt bodies 5 that are bolted to the full hydraulic steering gear main body 1. The full hydraulic steering gear main body 1 is provided with a safety valve pressure chamber 6 and a pressure relief chamber 8. The pressure relief chamber 8 is provided with a first pressure relief hole 801 at the bottom end. The first pressure relief hole 801 is connected to the safety valve pressure chamber 6. The pressure relief chamber 8 is provided with a second hydraulic cylinder 804 at the top inside. The pressure relief chamber 8 is provided with an adjusting pressure relief block 9. The pressure relief chamber 8 is provided with a hydraulic lifting assembly 7 at the top inside. The pressure relief chamber 8 is provided with a second pressure relief hole 803 at the top.

[0030] A sealing block 901 is installed at the bottom of the adjusting pressure relief block 9, and the sealing block 901 cooperates with the first pressure relief hole 801. A second high-pressure spring body 902 is installed at the top of the sealing block 901, and the top of the second high-pressure spring body 902 is fixedly connected to the bottom of the second hydraulic cylinder 804. A sealing gasket 904 is installed at the bottom of the adjusting pressure relief block 9, and an arc-shaped sealing ring 903 is installed at the bottom of each sealing gasket 904. Through the design of the sealing gasket 904, the sealing effect of the adjusting pressure relief block 9 on the first pressure relief hole 801 is better.

[0031] The bottom of the pressure relief chamber 8 is provided with a sealing groove 802, and the sealing groove 802 and the arc-shaped sealing ring 903 seal each other. The sealing groove 802 and the arc-shaped sealing ring 903 seal each other, so that the pressure relief block 9 and the first pressure relief hole 801 have a better sealing effect.

[0032] The specific working principle is as follows: First, through the design of the second high-pressure spring body 902, when the pressure inside the safety valve pressure chamber 6 exceeds the deformation force that the second high-pressure spring body 902 can withstand, the pressure inside the safety valve pressure chamber 6 squeezes the sealing block 901 and squeezes the second high-pressure spring body 902 to deform, so that the sealing block 901 can rise and fall inside the first pressure relief hole 801, thereby relieving pressure through the first pressure relief hole 801 and the second pressure relief hole 803. After the pressure relief is completed, the second high-pressure spring body 902 elastically recovers, so that the second high-pressure spring body 902 drives the sealing block 901 to seal with the first pressure relief hole 801, thereby improving the sealing effect.

[0033] Example 2: Refer to Figures 1-7 This is the first embodiment of the present invention. This embodiment provides a compact full hydraulic steering gear with adjustable safety valve pressure. It can realize the use of most compact full hydraulic steering gears with adjustable safety valve pressure on the market. During long-term use, the internal pressure of the safety valve of the full hydraulic steering gear is prone to rise. If the pressure is not released in time, the internal pressure of the safety valve will be high, which will affect the service life of the full hydraulic steering gear. Therefore, a compact full hydraulic steering gear with adjustable safety valve pressure is needed to meet people's needs. The hydraulic lifting component 7 includes a first hydraulic cylinder 701. The first hydraulic cylinder 701 is fixedly installed at the top of the pressure relief chamber 8. The first hydraulic cylinder 701 is provided with a hydraulic oil body 705. The bottom end of the first hydraulic cylinder 701 is provided with a sealing plug body 703. The first hydraulic cylinder 701 is provided with a first piston plate 702. The bottom end of the first piston plate 702 is installed with a piston rod 704 that penetrates the sealing plug body 703. The bottom end of the piston rod 704 is fixedly connected to the top end of the adjusting pressure relief block 9.

[0034] The second hydraulic cylinder 804 is equipped with a second piston plate 8041 inside, and a third high-pressure spring body 8042 is installed at one end of the second piston plate 8041 that is close to each other. The side walls at both ends of the second hydraulic cylinder 804 are equipped with connecting pipes 8043 that are connected to the first hydraulic cylinder 701. Through the design of the connecting pipes 8043, the hydraulic oil body 705 can enter the second hydraulic cylinder 804 through the connecting pipes 8043 and squeeze the second piston plate 8041 and the third high-pressure spring body 8042.

[0035] The specific working principle is as follows: When the pressure inside the safety valve pressure chamber 6 squeezes the sealing block 901 and causes it to rise and fall inside the first pressure relief hole 801, the sealing block 901 drives the adjusting pressure relief block 9 to squeeze the piston rod 704. This causes the piston rod 704 to drive the first piston plate 702 to slide inside the first hydraulic cylinder 701, and the hydraulic oil body 705 enters the second hydraulic cylinder 804. The hydraulic oil body 705 then squeezes the second piston plate 8041, and the second piston plate 8041 squeezes the third high-pressure spring body 8042, causing it to deform. This allows the sealing block 901 to move within the first... The pressure relief hole 801 rises and falls internally, thereby allowing pressure to be relieved through the first pressure relief hole 801 and the second pressure relief hole 803. At the same time, after the pressure inside the safety valve pressure chamber 6 is relieved, the third high-pressure spring body 8042 elastically recovers, causing the second piston plate 8041 to squeeze the hydraulic oil body 705 inside the second hydraulic cylinder 804 into the first hydraulic cylinder 701 and squeeze the piston rod 704 to slide, thereby causing the sealing block 901 to seal with the first pressure relief hole 801, thus improving the sealing effect.

[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 compact, fully hydraulic steering gear with adjustable safety valve pressure, characterized in that: include, The full hydraulic steering gear body (1) has a valve sleeve body (2) inside and a steering rod body (3) inside. One end of the full hydraulic steering gear body (1) has a mounting cover body (4), and the mounting cover body (4) has a bolt body (5) that is bolted to the full hydraulic steering gear body (1). The full hydraulic steering gear body (1) has a safety valve pressure chamber (6) inside and a pressure relief chamber (8) inside. The pressure relief chamber (8) has a first pressure relief hole (801) at the bottom end, which is connected to the safety valve pressure chamber (6). The pressure relief chamber (8) has a second hydraulic cylinder (804) installed at the top of the pressure relief chamber (8). The pressure relief chamber (8) has an adjusting pressure relief block (9) inside and a hydraulic lifting assembly (7) installed at the top of the pressure relief chamber (8).

2. A compact, fully hydraulic steering gear with adjustable safety valve pressure as described in claim 1, characterized in that: The hydraulic lifting assembly (7) includes a first hydraulic cylinder (701), which is fixedly installed at the top of the pressure relief chamber (8). The first hydraulic cylinder (701) is provided with a hydraulic oil body (705) inside. The bottom end of the first hydraulic cylinder (701) is provided with a sealing plug body (703). The first hydraulic cylinder (701) is provided with a first piston plate (702) inside. The bottom end of the first piston plate (702) is provided with a piston rod (704) that penetrates the sealing plug body (703). The bottom end of the piston rod (704) is fixedly connected to the top end of the adjusting pressure relief block (9).

3. A compact, fully hydraulic steering gear with adjustable safety valve pressure as described in claim 2, characterized in that: The second hydraulic cylinder (804) is equipped with a second piston plate (8041) inside, and a third high-pressure spring body (8042) is installed at one end of the second piston plate (8041) that is close to each other. The side walls at both ends of the second hydraulic cylinder (804) are equipped with connecting pipes (8043) that are connected to the first hydraulic cylinder (701).

4. A compact, fully hydraulic steering gear with adjustable safety valve pressure as described in claim 1, characterized in that: The pressure relief chamber (8) has a second pressure relief hole (803) at its top.

5. A compact, fully hydraulic steering gear with adjustable safety valve pressure as described in claim 1, characterized in that: The bottom end of the adjusting pressure relief block (9) is equipped with a sealing block (901), and the sealing block (901) cooperates with the first pressure relief hole (801). The top end of the sealing block (901) is equipped with a second high pressure spring body (902), and the top end of the second high pressure spring body (902) is fixedly connected to the bottom end of the second hydraulic cylinder (804).

6. A compact, fully hydraulic steering gear with adjustable safety valve pressure as described in claim 1, characterized in that: The bottom end of the regulating pressure relief block (9) is equipped with a sealing gasket (904), and the bottom end of the sealing gasket (904) is equipped with an arc-shaped sealing ring (903).

7. A compact, fully hydraulic steering gear with adjustable safety valve pressure as described in claim 1, characterized in that: The bottom of each pressure relief chamber (8) is provided with a sealing groove (802), and the sealing groove (802) and the arc-shaped sealing ring (903) are mutually sealed.

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