Telescopic hydraulic motor

Abstract

This utility model relates to a retractable hydraulic motor, which includes a fluid delivery valve assembly and a cylinder assembly connected to the fluid delivery valve assembly; the fluid delivery valve assembly includes a valve assembly housing; the valve assembly housing includes a hydraulically controlled directional valve A and a hydraulically controlled directional valve B connected by pipelines; the hydraulically controlled directional valve B controls the switching of the hydraulically controlled directional valve A; an oil inlet and an oil outlet are provided on the valve assembly housing; the oil inlet is respectively connected to the oil inlet pipeline A and the P1 port of the hydraulically controlled directional valve A; this utility model has a reasonable design, compact structure and is easy to use.

Description

Technical Field

[0001] This utility model relates to a retractable hydraulic motor. Background Technology

[0002] A conventional hydraulic motor consists of a cylinder and a piston, and it has a hydraulically operated directional valve component for automatic reversing when the piston reaches the top. The piston is driven by the cylinder to move back and forth.

[0003] The current piston can reciprocate in the cylinder, but when the piston gets stuck near the end of the cylinder, it needs to be completely disassembled and repaired, which is both time-consuming and cumbersome. In addition, the oil plug does not move flexibly, and the valve body space cannot be fully utilized.

[0004] Therefore, how to provide a standard directional valve structure with a directional motor piston direction that allows for easy directional switching without disassembling the motor has become an urgent technical problem to be solved; how to achieve replaceability and realize economic, efficient, and durable effects has also become an urgent technical problem to be solved. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a retractable hydraulic motor.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0007] To increase durability, a retractable hydraulic motor includes a fluid delivery valve assembly and a cylinder assembly connected to the fluid delivery valve assembly;

[0008] The fluid delivery valve assembly includes a valve assembly housing;

[0009] The valve assembly housing includes hydraulically controlled directional valve A and hydraulically controlled directional valve B connected by pipelines;

[0010] Hydraulic directional valve B controls the switching of hydraulic directional valve A;

[0011] An oil inlet and an oil outlet are provided on the valve assembly housing;

[0012] The oil inlet ports are respectively connected to oil inlet pipe A and P1 port of hydraulic control directional valve A;

[0013] The oil outlet is connected to port Q1 of hydraulic directional valve A and port Q2 of hydraulic directional valve B via an oil outlet pipeline.

[0014] As a further improvement to the above technical solution:

[0015] To achieve fixed support, the fluid delivery valve assembly and cylinder assembly are equipped with a frame.

[0016] The hydraulic cylinder assembly includes a housing mounted on a frame; the housing includes a lower cylinder body, a piston cylinder, and an upper cylinder body that are interconnected.

[0017] A piston assembly is provided in the piston cylinder; a piston rod is provided on the piston assembly;

[0018] The rodless chamber is connected to an oil replenishment branch; a check valve is installed on the oil replenishment branch; the outer wall of the check valve is threaded to the housing.

[0019] The rodless cavity is connected to the throttling branch; a throttling valve is installed on the throttling branch.

[0020] For ease of maintenance, this utility model adopts a multi-channel configuration. The oil passage connected to the housing has a plug, and the oil outlet A2 of the hydraulic control directional valve B is connected to the hydraulic control terminal C1 of the hydraulic control directional valve A through a connecting pipeline.

[0021] This utility model achieves automatic reversing by realizing dual hydraulic control and clever cooperation, providing stable power and a long stroke. The oil outlet A1 of the hydraulic control reversing valve A is connected to the rod chamber of the oil cylinder assembly through the first output branch.

[0022] The P2 port of the hydraulic control directional valve B is connected to its own hydraulic control terminal C2.

[0023] The pressure end B2 of the hydraulic directional valve B is connected to the rod chamber of the cylinder assembly through the feedback oil circuit B;

[0024] The oil inlet line A is divided into two paths. One path connects to the P2 port of the hydraulic directional valve B and to the rod chamber of the cylinder assembly through the oil inlet line B. The other path passes through the throttle valve on the throttle branch.

[0025] The throttling branch has two outputs: one connected to the pressure end B1 of the hydraulic directional valve A, and the other connected to the rodless chamber of the cylinder assembly.

[0026] This utility model features a hydraulically driven, automatically reversing motor that provides stable power, a longer stroke, and greater flexibility. It is more suitable for use in specific operating conditions, such as various fluid conveying equipment; it also solves the problems of difficult replacement and maintenance currently found in the market.

[0027] This utility model is reasonably designed, low in cost, sturdy and durable, safe and reliable, simple to operate, time-saving and labor-saving, cost-saving, compact in structure and easy to use. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the fluid delivery valve assembly of this utility model.

[0029] Figure 2 This is a schematic diagram of the first output branch structure of this utility model.

[0030] Figure 3 This is a hydraulic schematic diagram of this utility model.

[0031] Figure 4This is a schematic diagram of the fluid delivery valve assembly structure of this utility model.

[0032] Figure 5 This is a schematic diagram of the throttle valve structure of this utility model.

[0033] The components are as follows: 1. Frame; 2. Lower cylinder body; 3. Fluid delivery valve group; 4. Cylinder assembly; 5. Upper cylinder body; 6. Piston cylinder; 7. Piston component; 8. Check valve; 9. Piston rod; 10. Throttle valve; 11. Hydraulic directional valve A; 12. Hydraulic directional valve B; 13. Oil inlet; 14. Oil outlet; 15. Rodless chamber; 16. Rod chamber; 17. Oil inlet line A; 18. First output branch; 19. Oil inlet line B; 20. Feedback oil line B; 21. Connecting line; 22. Oil outlet line. Detailed Implementation

[0034] like Figure 1-5 As shown, the retractable hydraulic motor of this embodiment includes a fluid delivery valve assembly 3 and a cylinder assembly 4 connected to the fluid delivery valve assembly 3.

[0035] The fluid delivery valve assembly 3 includes a valve assembly housing;

[0036] The valve assembly housing includes hydraulically controlled directional valve A11 and hydraulically controlled directional valve B12 connected by pipelines;

[0037] Hydraulic directional valve B12 controls the switching of hydraulic directional valve A11;

[0038] An oil inlet 13 and an oil outlet 14 are provided on the valve assembly housing;

[0039] The oil inlet port 13 is connected to the oil inlet pipe A17 and the P1 port of the hydraulic control directional valve A11 respectively;

[0040] The oil outlet 14 is connected to the Q1 port of the hydraulic directional valve A11 and the Q2 port of the hydraulic directional valve B12 via the oil outlet pipeline 22.

[0041] The fluid delivery valve assembly 3 and the cylinder assembly 4 are equipped with a frame 1.

[0042] The hydraulic cylinder assembly 4 includes a housing mounted on the frame 1; the housing includes a lower cylinder 2, a piston cylinder 6, and an upper cylinder 5 connected to each other.

[0043] A piston component 7 is provided in the piston cylinder 6; a piston rod 9 is provided on the piston component 7;

[0044] The rodless chamber 15 is connected to an oil replenishment branch; a one-way valve 8 is installed on the oil replenishment branch; the outer wall of the one-way valve 8 is threadedly connected to the housing.

[0045] The rodless cavity 15 is connected to the throttling branch; a throttling valve 10 is installed on the throttling branch.

[0046] The oil outlet A2 of the hydraulic directional valve B12 is connected to the hydraulic control terminal C1 of the hydraulic directional valve A11 via connecting pipe 21. The oil outlet A1 of the hydraulic directional valve A11 is connected to the rod chamber 16 of the cylinder assembly 4 via the first output branch 18. The P2 port of the hydraulic directional valve B12 is connected to its own hydraulic control terminal C2.

[0047] The pressure end B2 of the hydraulic directional valve B12 is connected to the rod chamber 16 of the cylinder assembly 4 through the feedback oil circuit B20; the oil inlet line A17 is divided into two paths, one path is connected to the P2 port of the hydraulic directional valve B12 and connected to the rod chamber 16 of the cylinder assembly 4 through the oil inlet line B19; the other path is connected to the throttle valve 10 on the throttle branch.

[0048] The throttling branch throttling valve 10 outputs two paths: one path is connected to the pressure end B1 of the hydraulic control directional valve A11, and the other path is connected to the rodless chamber 15 of the cylinder assembly 4.

[0049] Using the frame 1 as a carrier, the linear motion of the hydraulic cylinder assembly 4 is controlled by the fluid delivery valve group 3; wherein, the lower cylinder body 2, the upper cylinder body 5, the piston cylinder 6, and the piston component 7 are set separately, which is convenient for disassembly and assembly.

[0050] The rodless cavity 15 is above the rod cavity 16.

[0051] The working principle of this utility model is as follows: When the downward movement occurs, the oil enters the B1 end through the oil inlet pipe A17 to achieve pressure triggering.

[0052] The hydraulic directional valve A11 moves downward, supplying oil through the first output branch 18 and opening the check valve 8 for a large flow of oil; the piston rod 9 moves downward, compressing the rod chamber 16, and the oil is fed back to the B2 end through the feedback oil circuit B20, and circulated through the oil inlet pipe B19.

[0053] High-pressure oil enters through the oil inlet 13 to replenish the oil; the hydraulic control directional valve B12 is connected to the oil outlet 14 through the O2 hole in the connecting pipeline 21.

[0054] When upward movement is required, as shown in the schematic diagram, the high-pressure oil in the oil inlet 13 enters the rod chamber 16, and the oil is fed back to the B2 end through the feedback oil circuit B20. The hydraulic control directional valve B12 moves to the right, connecting O2 to the oil inlet 13, and the connecting pipeline 21 controls the hydraulic control directional valve A11 to move upward.

[0055] The rodless chamber 15 is compressed and discharged through the hydraulically controlled directional valve A11.

[0056] This invention achieves automatic control through a hydraulic valve, and by setting a pressure threshold, it ensures smooth movement of the piston rod and reduces vibration.

[0057] When the piston moves upward, hydraulic oil is discharged to reduce back pressure. When it moves downward, a closed circuit is used to ensure that the piston rod has backup pressure, resulting in smooth movement.

[0058] This utility model is described in detail for the purpose of making the disclosure clearer, and the prior art will not be listed one by one.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. It is obvious to those skilled in the art that multiple technical solutions of this utility model can be combined. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. All technical contents not described in detail in this utility model are publicly known technologies.

Claims

1. A retractable hydraulic motor, characterized in that: Includes a fluid delivery valve assembly (3) and a hydraulic cylinder assembly (4) connected to the fluid delivery valve assembly (3); The fluid delivery valve assembly (3) includes a valve assembly housing; The valve assembly housing includes hydraulically controlled directional valve A (11) and hydraulically controlled directional valve B (12) connected by pipelines; Hydraulic directional valve B(12) controls the switching of hydraulic directional valve A(11); An oil inlet (13) and an oil outlet (14) are provided on the valve assembly housing; The oil inlet (13) is connected to the oil inlet pipe A (17) and the P1 port of the hydraulic control directional valve A (11) respectively; The oil outlet (14) is connected to the Q1 port of hydraulic control directional valve A (11) and the Q2 port of hydraulic control directional valve B (12) through the oil outlet pipeline (22).

2. The retractable hydraulic motor according to claim 1, characterized in that: The fluid delivery valve assembly (3) and the cylinder assembly (4) are equipped with a frame (1).

3. The retractable hydraulic motor according to claim 2, characterized in that: The hydraulic cylinder assembly (4) includes a housing mounted on the frame (1); the housing includes a lower cylinder body (2), a piston cylinder (6), and an upper cylinder body (5) connected to each other; A piston component (7) is provided in the piston cylinder (6); a piston rod (9) is provided on the piston component (7); The rodless chamber (15) is connected to an oil replenishment branch; a check valve (8) is installed on the oil replenishment branch; the outer wall of the check valve (8) is threaded to the housing; The rodless cavity (15) is connected to the throttling branch; a throttling valve (10) is installed on the throttling branch.

4. The retractable hydraulic motor according to any one of claims 1-3, characterized in that: The oil outlet A2 of the hydraulic directional valve B (12) is connected to the hydraulic control terminal C1 of the hydraulic directional valve A (11) via the connecting pipe (21).

5. The retractable hydraulic motor according to claim 4, characterized in that: The oil outlet A1 of the hydraulic directional valve A (11) is connected to the rod chamber (16) of the cylinder assembly (4) through the first output branch (18).

6. The retractable hydraulic motor according to claim 5, characterized in that: The P2 port of the hydraulic control directional valve B(12) is connected to its own hydraulic control terminal C2.

7. The retractable hydraulic motor according to claim 6, characterized in that: The pressure end B2 of the hydraulic directional valve B (12) is connected to the rod chamber (16) of the cylinder assembly (4) through the feedback oil circuit B (20); The oil inlet line A (17) is divided into two paths. One path connects to the P2 port of the hydraulic control directional valve B (12) and to the rod chamber (16) of the cylinder assembly (4) through the oil inlet line B (19); the other path goes through the throttle valve (10) on the throttle branch.

8. The retractable hydraulic motor according to claim 7, characterized in that: The throttling branch throttling valve (10) outputs two paths: one path is connected to the pressure end B1 of the hydraulic control directional valve A (11), and the other path is connected to the rodless chamber (15) of the cylinder assembly (4).

9. The retractable hydraulic motor according to claim 8, characterized in that: The rodless cavity (15) is above the rod cavity (16).

10. The retractable hydraulic motor according to claim 8, characterized in that: An oil plug is installed on the valve assembly housing.

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