Stop valve capable of reducing force of push rod

Abstract

A stop valve capable of reducing push rod force is characterized in that one end of a push rod is arranged in a sheath, the other end of the push rod is a larger end sleeved at the upper end of a piston hole below a first step surface, the upper end of a piston rod abuts against the lower portion of the other end of the push rod, and a sleeve is sleeved at the position, corresponding to a second connector, of the piston hole; flat second sealing rings are respectively arranged at the upper and lower ends of the sleeve; the piston rod penetrates through the second sealing rings and is in sliding sealing with the inner sides of the second sealing rings. The utility model has the advantages of improving the product quality, reducing the push rod force, reducing the wear degree of the push rod and prolonging the product life.

Description

Technical Field

[0001] The invention relates to a stop valve for reducing push rod force. Background Art

[0002] The combination of the stop valve and the two-position five-way valve is used for gear shifting in the transmission. The ventilation function of the stop valve provides the air source for the normal operation of the two-position five-way valve. If the stop valve function fails, the two-position five-way valve will inevitably fail to work. Therefore, the stop valve plays a decisive role in the gear shift valve.

[0003] The existing gearbox has a large shifting force, which easily causes wear of the push rod and other components in the stop valve. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to provide a stop valve with reduced push rod force.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a stop valve that reduces the push rod force, comprising a valve body, a sleeve, a push rod, a piston rod and a return spring, a piston hole is provided in the valve body, the right side of the piston hole is communicated with the first interface, the left side of the piston hole is communicated with the second interface, a return spring installation cavity is provided at the bottom of the piston hole, the return spring installation cavity is lower than the first interface, the second interface is higher than the first interface, a piston rod is provided in the piston hole, a concave is provided at the lower end of the piston rod, a return spring is provided between the concave and the return spring installation cavity, a push rod cavity is provided at the upper end of the piston hole, the push rod cavity and the piston hole are communicated, connecting holes are provided on both sides of the piston rod, the connecting hole is connected to the concave, and the connecting hole and the concave are connected to the piston rod When resetting, the second interface and the first interface are connected, and there is a first step surface between the push rod cavity and the piston hole. A first recess is provided at the push rod cavity near the upper end of the first step surface, and a first sealing ring is sleeved in the first recess. A sleeve is sleeved in the push rod cavity divided from the first recess, and one end of the push rod is provided in the sleeve. The other end of the push rod is the larger end sleeved on the upper end of the piston hole under the first step surface. The upper end of the piston rod is against the bottom of the other end of the push rod, and a sleeve is sleeved at the piston hole corresponding to the second interface. A circle of third recess is provided on the outside of the sleeve corresponding to the second interface surface, and a number of through holes are provided on the third recess. Flat second sealing rings are respectively provided at the upper and lower ends of the sleeve, and the piston rod passes through the second sealing ring and slides and seals with the inner side of the second sealing ring.

[0006] Furthermore, the piston hole is provided with a second step surface, a third step surface and a fourth step surface from top to bottom, the second step surface is provided with a sleeve, the lower end of the sleeve passes through the second step surface and rests on the second sealing ring at the upper end of the sleeve, and the upper end of the sleeve is provided with an outer edge covering the second step surface; a gasket is provided below the second sealing ring at the lower end of the sleeve, and the second sealing ring at the lower end of the sleeve rests on the gasket to cover the gasket on the third step surface, and the fourth step surface is provided above the reset spring mounting cavity, and the inner side of the fourth step surface is a downward-shrinking inclined surface.

[0007] Furthermore, the piston rod diameter is reduced to 75% of the existing diameter.

[0008] Furthermore, the piston hole corresponding to the second interface is flat and has no concave.

[0009] The beneficial effects of the present invention are: improving product quality, reducing push rod force, reducing push rod wear, and extending product life. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is the structural diagram of this patent. DETAILED DESCRIPTION

[0011] The following is a combination of the embodiments of the present invention Figure 1 , the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0012] Example 1 reference Figure 1 , a stop valve that reduces the push rod force, includes a valve body 1, a sleeve 2, a push rod 3, a piston rod 4 and a return spring 5, a piston hole 6 is provided in the valve body, the right side of the piston hole 6 is connected to the first interface 7, and the left side of the piston hole 6 is connected to the second interface 8, a return spring installation cavity 9 is provided at the bottom of the piston hole 6, the return spring installation cavity 9 is lower than the first interface 7, and the second interface 8 is higher than the first interface 7, a piston rod 4 is provided in the piston hole 6, a concave 11 is provided at the lower end of the piston rod 4, a return spring 5 is provided between the concave 11 and the return spring installation cavity 9, a push rod cavity 12 is provided at the upper end of the piston hole 6, the push rod cavity 12 is connected to the piston hole 6, and connecting holes 13 are provided on both sides of the piston rod 4, the connecting hole 13 is connected to the concave 11, and the connecting hole 13 is connected to the concave 11 when the piston rod is reset. The second interface 8 and the first interface 7 are connected, and there is a first step surface 14 between the push rod cavity 12 and the piston hole 6. The push rod cavity 12 is provided with a first recess 15 near the upper end of the first step surface. A first sealing ring 16 is sleeved in the first recess. A sleeve 2 is sleeved in the push rod cavity above the first recess. One end of the push rod is provided in the sleeve 2. The other end of the push rod is the larger end sleeved on the upper end of the piston hole under the first step surface. The upper end of the piston rod is against the bottom of the other end of the push rod. A sleeve 17 is sleeved at the piston hole corresponding to the second interface. A circle of third recess 18 is provided on the outside of the sleeve corresponding to the second interface surface. A number of through holes 19 are provided on the third recess 18. Flat second sealing rings 20 and 21 are respectively provided at the upper and lower ends of the sleeve. The piston rod passes through the second sealing ring and slides and seals with the inner side of the second sealing ring.

[0013] A stop valve that reduces the force of a push rod, wherein the piston hole is provided with a second step surface 22, a third step surface 23 and a fourth step surface 24 from top to bottom, the second step surface is provided with a sleeve 10, the lower end of the sleeve passes through the second step surface and abuts against the second sealing ring 20 at the upper end of the sleeve, and the upper end of the sleeve is provided with an outer edge covering the second step surface; a gasket is provided below the second sealing ring 21 at the lower end of the sleeve, the second sealing ring at the lower end of the sleeve abuts on the gasket to cover the gasket on the third step surface, the fourth step surface is provided above the reset spring installation cavity, and the inner side of the fourth step surface is a downward-contracting inclined surface 25.

[0014] A stop valve with reduced push rod force and a piston rod diameter reduced to 75% of the existing diameter.

[0015] A stop valve for reducing push rod force, wherein the piston hole corresponding to the second interface is flat and has no concave.

[0016] A stop valve with reduced push rod force improves product quality, reduces push rod force, reduces push rod wear, and extends product life.

[0017] A stop valve that reduces the force of a push rod, wherein the upper end of a second step surface is provided with a second recess 25, and the outer edge is embedded in the second recess.

[0018] A stop valve with reduced push rod force, wherein the upper end of the push rod protrudes from the valve body in a normal state.

[0019] A stop valve for reducing push rod force, wherein a connecting hole is connected to a through hole.

[0020] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A stop valve for reducing push rod force, comprising a valve body, a sheath, a push rod, a piston rod and a return spring, characterized in that: A piston hole is provided in the valve body, the right side of the piston hole is communicated with the first interface, the left side of the piston hole is communicated with the second interface, a reset spring installation cavity is provided at the bottom of the piston hole, the reset spring installation cavity is lower than the first interface, and the second interface is higher than the first interface, a piston rod is provided in the piston hole, a concave is provided at the lower end of the piston rod, a reset spring is provided between the concave and the reset spring installation cavity, a push rod cavity is provided at the upper end of the piston hole, the push rod cavity and the piston hole are communicated, connecting holes are provided on both sides of the piston rod, the connecting hole is communicated with the concave, and the connecting hole and the concave are connected to the second interface and the first interface when the piston rod is reset, and there is a first The step surface is transitional, and a first recess is provided in the push rod cavity near the upper end of the first step surface. A first sealing ring is sleeved in the first recess, and a sleeve is sleeved in the push rod cavity above the first recess. One end of the push rod is provided in the sleeve, and the other end of the push rod is the larger end sleeved on the upper end of the piston hole under the first step surface. The upper end of the piston rod is against the bottom of the other end of the push rod, and a sleeve is sleeved at the second interface corresponding to the piston hole. A circle of third recess is provided on the outer side of the sleeve corresponding to the second interface surface, and a number of through holes are provided on the third recess. A flat second sealing ring is provided at the upper and lower ends of the sleeve respectively, and the piston rod passes through the second sealing ring and slides and seals with the inner side of the second sealing ring.

2. A stop valve for reducing push rod force according to claim 1, characterized in that: The piston hole is provided with a second step surface, a third step surface and a fourth step surface from top to bottom. The second step surface is provided with a sleeve body. The lower end of the sleeve body passes through the second step surface and rests on the second sealing ring at the upper end of the sleeve. The upper end of the sleeve body is provided with an outer edge covering the second step surface; a gasket is provided below the second sealing ring at the lower end of the sleeve, and the second sealing ring at the lower end of the sleeve rests on the gasket to cover the gasket on the third step surface. The fourth step surface is provided above the reset spring mounting cavity, and the inner side of the fourth step surface is a downward-contracting inclined surface.

3. The stop valve for reducing push rod force according to claim 1, characterized in that: The piston rod diameter is reduced to 75% of the existing diameter.

4. A stop valve for reducing push rod force according to claim 1, characterized in that: The piston hole corresponding to the second interface is flat and has no concave.

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