Oil way cut-off device for operating valve of gearbox of loading machine

Abstract

The utility model discloses a loader gearbox operating valve oil way cut-off device. The left side of a transition connector is locked and installed on an operating valve in a sealed mode through a combined gasket, and the right side of the transition connector is provided with a cut-off valve seat through a first sealing ring and a locking nut. The right end of the cut-off valve seat is provided with a cut-off valve cover and is sealed by a second sealing ring, the cut-off valve seat is provided with an oil inlet and a second oil return hole, and the cut-off valve cover is provided with a first oil return hole; the left end of the piston rod is installed in the cut-off valve seat through a third sealing ring, the right end of the piston rod is installed in the cut-off valve cover through a piston sealing ring, a spring is installed on the right end face of the piston rod, the other side of the spring abuts against the inner side face of the cut-off valve cover, the left end face of the piston rod abuts against a cut-off rod, and the cut-off rod is installed in the operating valve. The device is simple and compact in structure, low in manufacturing and maintenance cost and safe and reliable in operation, a gear oil way can be rapidly cut off when an emergency occurs in the working process of the loading machine, the whole machine is free of power output and rapidly stops, and safety accidents are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of a loader gearbox assembly, in particular to an oil circuit cutting device for a loader gearbox control valve. Background Art

[0002] The loader gearbox control valve is a control element used in the hydraulic system, which is mainly used to control the pressure, flow direction and flow of the pressure oil in the hydraulic system, so as to achieve the speed change of the loader in different gears. In an emergency, a device is needed to quickly cut off the gear oil circuit, so that the whole machine has no power output and stops quickly to avoid safety accidents. However, the control valves in the prior art generally do not have an emergency oil circuit cut-off device. Summary of the invention

[0003] The utility model aims to solve the above defects and provide a loader gearbox control valve oil circuit cut-off device which has a simple and compact structure, low manufacturing and maintenance costs, and safe and reliable operation, so that when an emergency occurs during the operation of the loader, the gear oil circuit can be quickly cut off, so that the whole machine has no power output and stops quickly to avoid safety accidents.

[0004] In order to achieve the above purpose, the utility model loader gearbox control valve oil circuit cut-off device comprises a control valve 1, a combination gasket 2, a transition joint 3, a sealing ring 1 4, a locking nut 5, a cut-off valve seat 7, a sealing ring 2 8, a piston sealing ring 9, a piston rod 10, a spring 11, a cut-off valve cover 12, a sealing ring 3 15 and a cut-off rod 16; the left side of the transition joint 3 is locked and sealed on the control valve 1 through the combination gasket 2, and the right side of the transition joint 3 is installed with the cut-off valve seat 7 through the sealing ring 1 4 and the locking nut 5; the right end of the cut-off valve seat 7 is installed with a cut-off valve seat 7. The cut-off valve cover 12 is sealed with a sealing ring 8, the cut-off valve seat 7 is provided with an oil inlet 6 and a second oil return hole 14, and the cut-off valve cover 12 is provided with an oil return hole 13; the left end of the piston rod 10 is installed in the cut-off valve seat 7 through a sealing ring 15, and the right end of the piston rod 10 is installed in the cut-off valve cover 12 through a piston sealing ring 9. A spring 11 is installed on the right end face of the piston rod 10, and the other side of the spring 11 is pressed against the inner side face of the cut-off valve cover 12. The left end face of the piston rod 10 is against the cut-off rod 16, and the cut-off rod 16 is installed in the control valve 1.

[0005] The above-mentioned loader gearbox control valve oil circuit cut-off device has the following technical characteristics and beneficial effects:

[0006] 1. The arrangement of the piston rod 10 and the cut-off rod 16 can realize the rapid cut-off of the control valve oil circuit, so that the whole machine has no power output and can stop quickly, which greatly improves the safety of the equipment;

[0007] 2. The setting of the oil hole 13 and the oil return hole 2 14 allows the oil leaking from the piston seal ring 9 and the seal ring 3 15 to be quickly discharged, so that the piston rod 10 can move back and forth smoothly, thus ensuring the stability of the cut-off function of the control valve;

[0008] 3. The structure is simple and compact, the production and maintenance costs are low, and it is safe and reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The utility model is a main sectional structural diagram of a loader gearbox control valve oil circuit cutting device.

[0010] Figure numerals: control valve 1, combination gasket 2, transition joint 3, sealing ring 1 4, locking nut 5, oil inlet 6, cut-off valve seat 7, sealing ring 2 8, piston sealing ring 9, piston rod 10, spring 11, cut-off valve cover 12, oil return hole 1 13, oil return hole 2 14, sealing ring 3 15, cut-off rod 16. DETAILED DESCRIPTION

[0011] The specific implementation of the loader gearbox control valve oil circuit cut-off device of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0012] Figure 1 As shown, the utility model loader gearbox control valve oil circuit cut-off device comprises a control valve 1, a combination gasket 2, a transition joint 3, a sealing ring 1 4, a locking nut 5, a cut-off valve seat 7, a sealing ring 2 8, a piston sealing ring 9, a piston rod 10, a spring 11, a cut-off valve cover 12, a sealing ring 3 15 and a cut-off rod 16; the left side of the transition joint 3 is locked and sealed on the control valve 1 through the combination gasket 2, and the right side of the transition joint 3 is installed with the cut-off valve seat 7 through the sealing ring 1 4 and the locking nut 5; the right end of the cut-off valve seat 7 is installed with the cut-off valve cover 12 and sealed with the sealing ring 2 8, the cut-off valve seat 7 is provided with an oil inlet 6 and an oil return hole 2 14, the cut-off valve cover 12 is provided with an oil return hole 13, and the settings of the oil return hole 13 and the oil return hole 2 14 can make the oil return hole 13 and the oil return hole 2 14 from the oil return hole 13 to the oil return hole 13. The oil leaking from the piston seal ring 9 and the seal ring three 15 can be quickly discharged, so that the piston rod 10 can move back and forth smoothly, which well ensures the stability of the control valve cut-off function; the left end of the piston rod 10 is installed in the cut-off valve seat 7 through the seal ring three 15, and the right end of the piston rod 10 is installed in the cut-off valve cover 12 through the piston seal ring 9. The right end face of the piston rod 10 is installed with a spring 11, and the other side of the spring 11 is pressed against the inner side of the cut-off valve cover 12. The left end face of the piston rod 10 is against the cut-off rod 16, and the cut-off rod 16 is installed in the control valve 1; the setting of the piston rod 10 and the cut-off rod 16 can realize the rapid cutting of the control valve oil circuit, so that the whole machine has no power output and can stop quickly, which greatly improves the safety of the equipment.

[0013] By adopting the above-mentioned loader gearbox control valve oil circuit cutting device, the loader can quickly cut off the gear oil circuit in an emergency situation, so that the whole machine has no power output and can stop quickly, avoiding the occurrence of safety accidents and greatly improving the safety of the equipment.

Claims

1. A loader gearbox control valve oil circuit cut-off device, characterized by: It comprises a control valve (1), a combined gasket (2), a transition joint (3), a sealing ring 1 (4), a locking nut (5), a cut-off valve seat (7), a sealing ring 2 (8), a piston sealing ring (9), a piston rod (10), a spring (11), a cut-off valve cover (12), a sealing ring 3 (15) and a cut-off rod (16); the left side of the transition joint (3) is installed on the control valve (1) through the combined gasket (2) for locking and sealing, and the right side of the transition joint (3) is installed on the cut-off valve seat (7) through the sealing ring 1 (4) and the locking nut (5); the right end of the cut-off valve seat (7) is installed with the cut-off valve cover (12) and the sealing ring 2 is used to seal the cut-off valve seat (7). (8) seal, the cut-off valve seat (7) is provided with an oil inlet (6) and a second oil return hole (14), and the cut-off valve cover (12) is provided with an oil return hole (13); the left end of the piston rod (10) is installed in the cut-off valve seat (7) through a third sealing ring (15), and the right end of the piston rod (10) is installed in the cut-off valve cover (12) through a piston sealing ring (9), a spring (11) is installed on the right end surface of the piston rod (10), and the other side of the spring (11) is pressed against the inner side surface of the cut-off valve cover (12), and the left end surface of the piston rod (10) is pressed against the cut-off rod (16), and the cut-off rod (16) is installed in the control valve (1).

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