Hydraulic bidirectional lock

Abstract

The utility model relates to a hydraulic bidirectional lock. The technical problem to be solved by the utility model is to provide a hydraulic two-way lock. According to the technical scheme, the two-way lock valve comprises a two-way lock valve body, a pilot valve element assembly and a one-way valve assembly, the one-way valve assembly comprises an inner valve seat, a one-way valve sleeve, a valve element and a valve element reset assembly, the pilot valve element assembly comprises an ejector rod, and the valve element reset assembly comprises a valve element reset spring, a protection plate and a connecting pin. A valve sleeve guide groove and a valve sleeve connecting hole are formed in the one-way valve sleeve, a valve sleeve inner flange is arranged in the valve sleeve guide groove, and a spring limiting groove is formed in the valve element. The hydraulic two-way lock has the advantages that the protection plate is introduced, the stress structure of the spring is optimized, excessive extrusion and fatigue damage of the valve element reset spring are reduced, and the service life of a product is remarkably prolonged; and through the connecting structure of the inner valve seat and the sealing gasket, the sealing performance of the butt joint of the valve element and the inner valve seat is remarkably improved.

Description

Technical Field

[0001] This utility model relates to a hydraulic two-way lock. Background Technology

[0002] Hydraulic two-way locks are mainly used to lock the position of hydraulic cylinders, preventing accidental movement due to external forces. They typically consist of a two-way lock valve body, a pilot valve core assembly, and a check valve assembly. In traditional hydraulic two-way locks, when the pilot valve core's push rod pushes the check valve core, the check valve core's return spring is easily over-compressed due to factors such as changes in hydraulic pressure. This over-compression can lead to plastic deformation or fatigue fracture of the return spring, directly affecting the valve core's reset function. This results in unstable sealing at the valve core-inner valve seat connection, a shorter lifespan for the return spring, increased maintenance costs, and the need for frequent replacement, impacting the normal operation of the two-way lock. Improvements and optimizations are proposed to address these issues. Utility Model Content

[0003] To solve the above problems, the technical problem to be solved by this utility model is to provide a hydraulic two-way lock.

[0004] The technical solution adopted by this utility model of hydraulic bidirectional lock is as follows: It includes a bidirectional lock valve body, a pilot valve core assembly disposed within the bidirectional lock valve body, and one-way valve assemblies disposed at both ends of the pilot valve core assembly. The one-way valve assembly comprises an inner valve seat, a one-way valve sleeve, a valve core, and a valve core reset assembly. The pilot valve core assembly includes push rods at both ends that drive the valve core to move. The valve core reset assembly includes a valve core reset spring, a protective plate, and a connecting pin. The one-way valve sleeve is provided with a valve sleeve guide groove for the movement of the valve core and a valve sleeve connector perpendicularly communicating with the valve sleeve guide groove. The valve sleeve guide groove has an inner flange, the valve core has a spring limiting groove, the protective plate includes a central part and a mounting part fixed in the spring limiting groove, the central part of the protective plate has a waist-shaped protective opening at one end away from the mounting part, the connecting pin connects the valve sleeve connecting hole and the waist-shaped protective opening together, the valve core reset spring is sleeved on the central part of the protective plate, one end of which abuts against the inner flange of the valve sleeve and the other end is placed in the spring limiting groove.

[0005] The one-way valve assembly further includes a sealing gasket, the inner valve seat includes an inner valve seat body and an inner valve seat mating end, the valve core end is provided with a valve core positioning groove corresponding to the inner valve seat mating end, the one-way valve sleeve end is connected to the inner valve seat body, and the one-way valve sleeve is provided with a sealing gasket first limiting groove for limiting the sealing gasket.

[0006] The bottom of the spring limiting groove is provided with a valve core mating groove corresponding to the protective plate mounting part, and the valve core mating groove is provided with a valve core threaded hole for fixing the protective plate mounting part.

[0007] One end of the waist-shaped protective opening is provided with a protective plate through hole that communicates with the waist-shaped protective opening and is used for the connecting pin to pass through. The connecting pin is provided with a connecting pin limiting groove for moving on the waist-shaped protective opening.

[0008] The inner valve seat has a recessed groove on the outer wall of the mating end, and the sealing gasket has a sealing gasket reinforcement part that is sleeved on the recessed groove of the inner valve seat.

[0009] The advantages of this utility model hydraulic two-way lock are: the introduction of a protective plate and the optimization of the spring force structure reduce the excessive compression and fatigue damage of the valve core return spring, significantly improving the service life of the product; the connection structure of the inner valve seat and the sealing gasket significantly improves the sealing performance at the joint between the valve core and the inner valve seat. Attached Figure Description

[0010] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0011] Figure 1 This is a half-sectional view of the hydraulic two-way lock of this utility model;

[0012] Figure 2 This is a half-sectional view of the pilot valve core assembly of this utility model;

[0013] Figure 3 This is a half-sectional view of the valve sleeve of the one-way valve of this utility model;

[0014] Figure 4 This is a cross-sectional view of the valve core reset assembly of this utility model;

[0015] Figure 5 This is a half-sectional view of the valve core of this utility model;

[0016] Figure 6 This is a schematic diagram of the structure of the protective plate of this utility model;

[0017] Figure 7 This is a half-sectional view of the inner valve seat of this utility model;

[0018] Figure 8 This is a half-sectional view of the sealing gasket of this utility model;

[0019] Figure 9 This is a schematic diagram of the connecting pin of this utility model;

[0020] Figure 10 This is a half-sectional view of the valve sleeve of the one-way valve of this utility model. Detailed Implementation

[0021] like Figure 1-10 As shown, the hydraulic bidirectional lock of this utility model includes a bidirectional lock valve body 1, a pilot valve core assembly 2 disposed within the bidirectional lock valve body 1, and a one-way valve assembly 3 disposed at both ends of the pilot valve core assembly 2. The one-way valve assembly 3 includes an inner valve seat 11, a one-way valve sleeve 12, a valve core 13, and a valve core reset assembly 14. The pilot valve core assembly 2 includes push rods 6 at both ends that drive the valve core 13 to move. The valve core reset assembly 14 includes a valve core reset spring 17, a protective plate 18, and a connecting pin 19. The one-way valve sleeve 12 is provided with a valve sleeve guide groove 21 for moving the valve core 13 and a valve sleeve connecting hole 23 perpendicularly communicating with the valve sleeve guide groove 21. The valve sleeve guide groove 21 is provided with an inner valve sleeve retaining edge 22. The valve core 13 is provided with a spring limiting groove 26. The protective plate 18 includes a protective plate central section 27 and a protective plate mounting section 28 fixed in the spring limiting groove 26. The protective plate central section 27 has a waist-shaped protective opening 29 at one end away from the protective plate mounting section 28. The connecting pin 19 connects the valve sleeve connecting hole 23 and the waist-shaped protective opening 29 together. The valve core return spring 17 is sleeved on the protective plate central section 27, with one end abutting against the inner flange 22 of the valve sleeve and the other end placed in the spring limiting groove 26. By introducing the protective plate 18 and the waist-shaped protective opening 29, the movement range of the valve core 13 is limited, thereby preventing the valve core return spring 17 from being excessively squeezed and fatigued, thus protecting the valve core return spring and significantly improving the service life of the product.

[0022] The one-way valve assembly 3 further includes a sealing gasket 15. The inner valve seat 11 includes an inner valve seat body 31 and an inner valve seat mating end 32. The valve core 13 has a valve core positioning groove 34 at its end corresponding to the inner valve seat mating end 32. The end of the one-way valve sleeve 12 is connected to the inner valve seat body 31. The one-way valve sleeve 12 has a sealing gasket first limiting groove 24 for limiting the sealing gasket 15, thereby improving the sealing performance at the connection between the valve core 13 and the inner valve seat 11.

[0023] The bottom of the spring limiting groove 26 is provided with a valve core mating groove 38 corresponding to the protective plate mounting part 28. The valve core mating groove 38 is provided with a valve core threaded hole 39 for fixing the protective plate mounting part 28, so that the connection is tighter and more secure.

[0024] One end of the waist-shaped protective opening 29 is provided with a protective plate through hole 41 that communicates with the waist-shaped protective opening 29 and is used for the connecting pin 19 to pass through. The connecting pin 19 is provided with a connecting pin limiting groove 42 for moving on the waist-shaped protective opening 29, which effectively prevents the protective plate 18 from shifting up and down during the movement and improves the stability and reliability of the overall operation.

[0025] The inner valve seat mating end 32 has an inner valve seat recess 33 on its outer wall, and the sealing gasket 15 has a sealing gasket reinforcement part 37 sleeved on the inner valve seat recess 33, which further slows down the liquid flow at the connection, has a better liquid blocking effect, and further improves the sealing performance of the connection.

[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model are included within the protection scope of the present utility model.

Claims

1. A hydraulic bidirectional lock comprising a bidirectional lock valve body (1), a pilot spool assembly (2) arranged in the bidirectional lock valve body (1), a check valve assembly (3) arranged at both ends of the pilot spool assembly (2), characterized in that: The one-way valve assembly (3) comprises an inner valve seat (11), a one-way valve sleeve (12), a valve core (13) and a valve core reset assembly (14), the pilot valve core assembly (2) comprises a top rod (6) for moving the valve core (13), the valve core reset assembly (14) comprises a valve core reset spring (17), a protection plate (18) and a connecting pin (19), the one-way valve sleeve (12) is provided with a sleeve guide groove (21) for moving the valve core (13) and a sleeve connecting hole (23) vertically communicating with the sleeve guide groove (21), the sleeve guide groove (21) is provided with a sleeve inner stop (22), the valve core (13) is provided with a spring limiting groove (26), the protection plate (18) comprises a protection plate middle connecting part (27) and a protection plate mounting part (28) fixed in the spring limiting groove (26), the protection plate middle connecting part (27) is provided with a waist-shaped protection opening (29) at an end away from the protection plate mounting part (28), the connecting pin (19) connects the sleeve connecting hole (23) and the waist-shaped protection opening (29) together, the valve core reset spring (17) is sleeved on the protection plate middle connecting part (27), one end of the valve core reset spring (17) abuts against the sleeve inner stop (22) and the other end of the valve core reset spring (17) is arranged in the spring limiting groove (26).

2. The hydraulic bidirectional lock of claim 1, wherein: The one-way valve assembly (3) further comprises a sealing gasket (15), the inner valve seat (11) comprises an inner valve seat body (31) and an inner valve seat butt joint end (32), the valve core (13) is provided with a valve core positioning groove (34) corresponding to the inner valve seat butt joint end (32), the one-way valve sleeve (12) is in butt joint with the inner valve seat body (31), the one-way valve sleeve (12) is provided with a sealing gasket first limiting groove (24) for limiting the sealing gasket (15).

3. The hydraulic bidirectional lock of claim 1, wherein: The bottom of the spring limiting groove (26) is provided with a valve core butt joint groove (38) corresponding to the protection plate mounting part (28), the valve core butt joint groove (38) is provided with a valve core threaded hole (39) for fixing the protection plate mounting part (28).

4. The hydraulic bidirectional lock of claim 1, wherein: One end of the waist-shaped protection opening (29) is provided with a protection plate penetrating hole (41) communicating with the waist-shaped protection opening (29) and used for penetrating the connecting pin (19), the connecting pin (19) is provided with a connecting pin limiting groove (42) for moving on the waist-shaped protection opening (29).

5. The hydraulic bidirectional lock of claim 2, wherein: The outer wall of the inner valve seat butt joint end (32) is provided with an inner valve seat sinking groove (33), the sealing gasket (15) is provided with a sealing gasket reinforcing part (37) sleeved on the inner valve seat sinking groove (33).

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