Distribution valve structure capable of preventing cutting and leakage

Abstract

The utility model discloses an anti-cutting and anti-leakage distribution valve structure which comprises a valve body in clearance fit with a distribution valve hole in an oil pump body, the oil pump body is provided with a plurality of oil inlet holes and pressure relief holes which are communicated with the distribution valve hole, the tail end of the valve body is provided with a connecting end connected with a reversing piece, and the tail of the valve body is provided with a V-shaped groove communicated with the pressure relief holes. The valve body is provided with a first sealing part located in the distribution valve hole between the V-shaped groove and the connecting end, the first sealing part is sequentially connected with an O-shaped ring and a positioning pad in the direction facing the connecting end, and the oil pump body is connected with a positioning ring sleeve which extends into the first sealing part and abuts against the positioning pad through a bolt. According to the oil pump, the O-shaped ring can be prevented from being cut and losing efficacy, high-pressure impact on the O-shaped ring can be avoided during reversing pressure relief, hydraulic oil is prevented from leaking outwards, the positioning ring sleeve can effectively and accurately limit and fix the positioning pad and the O-shaped ring, and the risk that reversing cannot be achieved due to corrosion and adhesion of the oil pump body and the distribution valve is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of distribution valves, in particular to a distribution valve structure that is resistant to cutting and leakage. Background Art

[0002] The tilting system for heavy-duty truck cabs is used to raise and lower the cab during engine compartment maintenance. The hydraulic system consists of an oil pump, cylinder, and connecting pipes. The oil pump is the power source of the hydraulic system, and the pump's output pressure drives the cylinder to raise and lower the cab. The hydraulic pump's distribution valve controls the flow and direction of the hydraulic oil.

[0003] However, there are some problems with the existing distribution valve in use: 1. The axial sealing method of the existing distribution valve is an O-ring interference squeeze seal. During assembly, the entire distribution valve and O-ring pass through the distribution valve hole of the oil pump. However, there are oil holes intertwined horizontally and vertically in the distribution valve hole of the oil pump. When the distribution valve passes through the intertwined oil holes, there is a risk that the oil holes will cut the O-ring. If the O-ring is cut, it will cause the seal to fail and affect the performance of the oil pump; 2. The distribution valve and the distribution valve hole of the oil pump are clearance-fitted. When the oil pump is working, there will be a layer of about 0.0 0.5mm high-pressure oil film forms a radial oil film seal; when the distribution valve is reversed, the instantaneous pressure relief of the high-pressure oil film will form a high-pressure impact on the axial O-ring seal, resulting in a slight leakage of hydraulic oil. Although this situation has no effect on the function of the oil pump, the leaked hydraulic oil will be contaminated with dust and form sludge on the outer surface of the oil pump, affecting the appearance; 3. The distribution valve is made of 40Cr and the pump body is made of QT450. The oil pump is used in a relatively harsh environment. It is exposed to the air for a long time and is prone to rust after being exposed to wind and rain, which causes the distribution valve to rust and get stuck, making it unable to reverse, resulting in oil pump failure. Utility Model Content

[0004] In order to solve the technical problems in the prior art that the O-ring of the distribution valve is at risk of being cut, the instantaneous pressure relief of the high-pressure oil film may cause slight leakage of hydraulic oil, and the distribution valve may corrode and get stuck, resulting in oil pump failure, the present utility model provides the following technical solutions.

[0005] The utility model discloses a distribution valve structure that is resistant to cutting and leakage, including a valve body that is gap-matched with a distribution valve hole in an oil pump body, the oil pump body is provided with a plurality of oil inlet holes and pressure relief holes that are connected with the distribution valve hole, the tail end of the valve body is provided with a connecting end connected with a reversing member, the tail part of the valve body is provided with a V-shaped groove that is connected with the pressure relief hole, the valve body is provided with a first sealing portion located in the distribution valve hole between the V-shaped groove and the connecting end, the first sealing portion is connected with an O-ring and a positioning pad in sequence toward the direction of the connecting end, and the oil pump body is connected with a positioning ring sleeve that extends into the first sealing portion and presses against the positioning pad through bolts.

[0006] As a further technical solution, the valve body is provided with a second sealing portion located between the first sealing portion and the connecting end, and the second sealing portion is connected to a sealing ring tightly pressed against the positioning ring sleeve.

[0007] As a further technical solution, the positioning ring sleeve is made of nylon composite material.

[0008] As a further technical solution, the positioning pad is made of rigid material.

[0009] As a further technical solution, the outer diameter of the first sealing portion is smaller than the outer diameter of the valve body.

[0010] As a further technical solution, the outer diameter of the second sealing portion is smaller than the outer diameter of the first sealing portion.

[0011] The beneficial effects of the present invention are as follows: the present invention adjusts the tail structure of the distribution valve, the outer diameters of the first sealing part and the second sealing part are both smaller than the outer diameter of the valve body, and the O-ring can be assembled from the direction of the connection end after the distribution valve is assembled to the distribution valve hole. This assembly method can avoid the oil path holes interwoven in the distribution valve hole, and prevent the O-ring from being cut and rendered ineffective. A V-groove is provided at the tail of the return oil path of the distribution valve, and when the distribution valve is reversed and pressure is relieved, the high-pressure oil can be quickly relieved to the oil tank through the V-groove, avoiding high-pressure impact on the O-ring, thereby solving the risk of hydraulic oil leakage. A positioning ring sleeve is provided on the outside of the distribution valve hole between the distribution valve and the oil pump body, which can effectively position the positioning pad and the O-ring, and the positioning ring sleeve is made of nylon composite material, which can avoid the risk of being unable to reverse due to rust and adhesion of the oil pump body and the distribution valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic plan view of the structure of the utility model's anti-cutting and anti-leakage dispensing valve;

[0013] Figure 2 This is a cross-sectional view of the assembly plane of the utility model's anti-cutting and anti-leakage dispensing valve structure;

[0014] In the figure: 1-oil pump body; 101-oil inlet hole; 102-pressure relief hole; 2-valve body; 201-first sealing part; 202-second sealing part; 3-connecting end; 4-V-groove; 5-O-ring; 6-positioning pad; 7-positioning ring sleeve; 8-bolt; 9-sealing ring; 10-reversing member. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other unless there is a conflict.

[0016] In the description of this utility model, it should be understood that the terms "upper" and "lower" are based on the orientation or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc. are used solely for descriptive purposes and should not be construed to indicate or imply relative importance or implicitly specify the quantity of the technical features referred to. In the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0017] like Figure 1 and Figure 2 As shown, the present invention provides a cut-proof and leak-proof distribution valve structure, comprising a valve body 2 that is clearance-matched with a distribution valve hole within an oil pump body 1. The oil pump body 1 is provided with a plurality of oil inlet holes 101 and pressure relief holes 102 that communicate with the distribution valve hole. The rear end of the valve body 2 is provided with a connection end 3 that connects to a reversing member 10. Manual or electric operation of the reversing member 10 rotates the valve body 2 within the distribution valve hole of the oil pump body 1, controlling the flow and reversing of the hydraulic oil. It should be noted that any connection methods or structures not explicitly described in this embodiment utilize existing technologies and will not be further described.

[0018] In a preferred embodiment, the tail of the valve body 2 is provided with a V-shaped groove 4 that is connected to the pressure relief hole 102, wherein the tail refers to the direction of the valve body 2 close to the reversing member 10. When the distribution valve is reversed and the pressure is relieved, the V-shaped groove 4 on the right side of the O-ring 5 can quickly relieve pressure to the pressure relief hole 102, avoiding the impact of high-pressure hydraulic oil on the O-ring 5 and preventing hydraulic oil from leaking out. The valve body 2 is provided with a first sealing portion 201 located in the distribution valve hole between the V-shaped groove 4 and the connecting end 3. The first sealing portion 201 is used to seal between the outside of the valve body 2 and the distribution valve hole of the oil pump body 1. The outer diameter of the first sealing portion 201 is smaller than the outer diameter of the valve body 2. The first sealing portion 201 is connected to the O-ring 5 and the positioning pad 6 in sequence toward the connecting end 3. The O-ring 5 is a commonly used O-ring and is assembled at the rightmost end of the first sealing portion 201. The positioning pad 6 is a circular pad made of rigid material and is used to assist in the assembly of the O-ring 5.

[0019] When assembling, do not assemble the O-ring 5 first, and first remove the valve body 2 from the Figure 2 Push it into the distribution valve hole in the direction B shown in the figure, and then Figure 2 Direction A, as shown, assembles the O-ring 5 into the rightmost end of the first sealing portion 201, thus avoiding the risk of the O-ring 5 being cut when passing through the oil inlet hole 101 and the pressure relief hole 102. A positioning washer 6 assists in the assembly of the O-ring 5. By pushing the positioning washer 6, the O-ring 5 is pushed into the rightmost end of the first sealing portion 201 with an interference fit.

[0020] In a preferred embodiment, the oil pump body 1 is provided with multiple threaded holes surrounding the outer side of the distribution valve hole. These threaded holes are connected to retaining rings 7 via bolts 8. The retaining rings 7 have an L-shaped longitudinal cross-section, with one side extending into the distribution valve hole of the oil pump body 1 and the other side covering the outer side of the distribution valve hole. The retaining rings 7 are made of a nylon composite material, which offers high strength, high wear resistance, and self-lubrication. This prevents the risk of rust and adhesion between the oil pump body 1 and the distribution valve, which could prevent reversing.

[0021] The positioning sleeve 7 can extend into the first sealing portion 201 and abut against the positioning gasket 6. This allows the positioning gasket 6 and the O-ring 5 to be fixed in place, preventing axial movement of the positioning gasket 6 and the O-ring 5 and ensuring the sealing of the distribution valve. The valve body 2 is provided with a second sealing portion 202 located between the first sealing portion 201 and the connecting end 3. The outer diameter of the second sealing portion 202 is smaller than that of the first sealing portion 201. The second sealing portion 202 is connected to a sealing ring 9 that abuts against the positioning sleeve 7. The sealing ring 9 further improves the sealing performance of the valve body 2 and prevents the adverse effects of harsh environments on the valve body 2.

[0022] The preferred specific implementation methods and embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above implementation methods and embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes or equivalent substitutions can be made without departing from the concept of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments that fall within the scope of the claims of this application belong to the scope of protection of the present invention.

Claims

1. A cutting and leak-proof distribution valve structure, comprising a valve body (2) that is clearance-matched with a distribution valve hole in an oil pump body (1), the oil pump body (1) being provided with a plurality of oil inlet holes (101) and pressure relief holes (102) that are in communication with the distribution valve hole, the tail end of the valve body (2) being provided with a connection end (3) that is connected to a reversing member (10), and characterized in that: The tail of the valve body (2) is provided with a V-shaped groove (4) communicating with the pressure relief hole (102); the valve body (2) is provided with a first sealing portion (201) located in the distribution valve hole between the V-shaped groove (4) and the connecting end (3); the first sealing portion (201) is connected to an O-ring (5) and a positioning pad (6) in sequence in a direction toward the connecting end (3); the oil pump body (1) is connected to a positioning ring sleeve (7) extending into the first sealing portion (201) and pressed against the positioning pad (6) via a bolt (8).

2. The anti-cutting and anti-leakage dispensing valve structure according to claim 1, characterized in that: The valve body (2) is provided with a second sealing portion (202) located between the first sealing portion (201) and the connecting end (3), and the second sealing portion (202) is connected to a sealing ring (9) that is tightly pressed against the positioning ring sleeve (7).

3. The anti-cutting and anti-leakage dispensing valve structure according to claim 1, characterized in that: The positioning ring sleeve (7) is made of nylon composite material.

4. The anti-cutting and anti-leakage dispensing valve structure according to claim 1, characterized in that: The positioning pad (6) is made of a rigid material.

5. The anti-cutting and anti-leakage dispensing valve structure according to claim 1, characterized in that: The outer diameter of the first sealing portion (201) is smaller than the outer diameter of the valve body (2).

6. The anti-cutting and anti-leakage dispensing valve structure according to claim 2, characterized in that: The outer diameter of the second sealing portion (202) is smaller than the outer diameter of the first sealing portion (201).

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