A hydraulic control based self-adaptable switching support mode oil cylinder

Abstract

The application aims to provide a hydraulic control based oil cylinder capable of self-adaptable switching support mode, belonging to the technical field of mechanical manufacturing, comprising a hollow cylinder body, a piston rod two is sleeved in the cylinder body, a piston rod one is sleeved in the piston rod two, an end cover is arranged at the bottom of the cylinder body, a support disc is arranged at the bottom of the piston rod two, one end of the piston rod one penetrates through the support disc and is connected with a support wheel, one end of the piston rod two in the cylinder body is connected with a piston two, one end of the piston rod one in the piston rod two is connected with a piston one, a spring one is arranged in the piston rod two, one end of the spring one is fixedly connected with the piston two, and the other end is fixedly connected with the piston one, a spring two is arranged at the top end of the inner side of the cylinder body, the top end of the spring two is fixedly connected with the cylinder body, an oil inlet one and an oil inlet two are arranged at the upper end and the lower end of one side of the cylinder body, and an oil inlet three is arranged at the upper end of one side of the piston rod two. The application realizes automatic switching of two modes of moving and fixed support through control of spring force and hydraulic force.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of mechanical manufacturing, and particularly relates to an oil cylinder capable of self-adaptingly switching support modes based on hydraulic control. BACKGROUND

[0002] The coal roadway of a coal mine tunneling working face using an H-shaped belt frame to transport coal or coal gangue has the characteristics of small space, great difficulty in production auxiliary material management, and high labor operation intensity of workers. In order to reduce the labor operation intensity of workers and uniformly and centrally manage production auxiliary materials, a portable lifting machine for the coal roadway riding H-shaped belt frame is designed according to the small space characteristics of the coal roadway. The fixed support and flexible movement of the bottom plate of the lifting machine are achieved by manually replacing the support oil cylinder, which is of great workload and low work efficiency. SUMMARY

[0003] The application aims to provide an oil cylinder capable of self-adaptingly switching support modes based on hydraulic control. The spring force and hydraulic control are applied to enable one oil cylinder to automatically switch two modes, realize automatic switching of the two modes of the movable and fixed support of the portable lifting machine for the coal roadway riding H-shaped belt frame, and improve the work efficiency by avoiding manual replacement of the support oil cylinder mode in combination with the portable lifting machine for the coal roadway riding H-shaped belt frame.

[0004] The application adopts the following technical scheme:

[0005] An oil cylinder capable of self-adaptingly switching support modes based on hydraulic control comprises a hollow cylinder body, a hollow piston rod two is sleeved in the cylinder body, a piston rod one is sleeved in the piston rod two, an end cover is arranged at the bottom of the cylinder body, a support disc is arranged at the bottom of the piston rod two, one end of the piston rod one penetrates through the support disc and is connected with a support wheel, one end of the piston rod two in the cylinder body is connected with a piston two, one end of the piston rod one in the piston rod two is connected with a piston one, a spring one is arranged in the piston rod two, one end of the spring one is fixedly connected with the piston two, and the other end is fixedly connected with the piston one, a spring two is arranged at the inner top end of the cylinder body, the top end of the spring two is fixedly connected with the cylinder body, an oil channel one and an oil channel two are arranged at the upper end and the lower end of one side of the cylinder body respectively, and an oil channel three is arranged at the upper end of one side of the piston rod two.

[0006] Further, the axes of the cylinder body, the piston rod one and the piston rod two are located on the same straight line.

[0007] Further, the outer diameter of the piston one matches the inner diameter of the piston rod two.

[0008] Further, the outer diameter of the piston two matches the inner diameter of the cylinder body.

[0009] Further, a sealing ring one is arranged on the end cover.

[0010] Further, the piston one is provided with a sealing ring two.

[0011] Further, the piston two is provided with a sealing ring three.

[0012] Further, the support disc is provided with a groove.

[0013] The beneficial effects of the present application are as follows:

[0014] 1. The present application can realize automatic switching of two modes of moving and fixed support through spring force and hydraulic force control.

[0015] 2. The present application is combined with a portable lifting machine of a riding H-shaped belt frame to avoid manual replacement of support oil cylinder mode and improve work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the present application;

[0017] Figure 2 is a connection schematic diagram of the support wheel of the present application;

[0018] Figure 3 is a support disc ground operation principle diagram of the present application;

[0019] Figure 4 is a support wheel ground operation principle diagram of the present application;

[0020] Wherein: 1 - support wheel; 2 - piston rod one; 3 - support disc; 4 - piston rod two; 5 - sealing ring one; 6 - end cover; 7 - cylinder body; 8 - piston one; 9 - sealing ring two; 10 - spring one; 11 - sealing ring three; 12 - piston two; 13 - spring two; 14 - oil channel one; 15 - oil channel two; 16 - oil channel three. DETAILED DESCRIPTION

[0021] The present application is further described in conjunction with the drawings.

[0022] The present application is further described in conjunction with the drawings.

[0023] The upper end of the piston rod 2 is fixedly installed with the piston 8; the support disc 3 is fixedly installed with the lower end of the piston rod 2; the piston rod 2 is coaxially installed with the cylinder body 7, and forms a sealed cavity 1 together with the sealing ring 5 and the end cover 6; the piston 8 forms a sealed cavity 2 together with the piston rod 2 and the sealing ring 9; the upper end of the spring 10 is fixedly connected with the lower end of the piston 12, and the lower end of the spring 10 is fixedly connected with the upper end of the piston 8, and is in a stretched state under normal circumstances; the piston 12 forms a sealed cavity 3 together with the cylinder body 7 and the sealing ring 3; the upper end of the spring 13 is fixedly connected with the cylinder body 7, and is in a non-stretching state under normal circumstances; the support wheel 1 is assembled with the lower end of the piston rod 2, and the support wheel 1 can freely rotate around the central axis and rotate flexibly. The outer surface of the piston rod 2 can be used as the piston rod of the cylinder body 7, and the inner surface of the piston rod 2 is used as the cavity of the piston 8; the outer diameter of the piston 8 and the inner diameter of the piston rod 2 are coaxial, and the sealing effect of the sealing ring 9 is required to be good, so as to ensure the sealing effect of the sealed cavity 2; the outer diameter of the piston 12 and the inner diameter of the cylinder body 7 are coaxial, and the sealing effect of the sealing ring 3 is required to be good, so as to ensure the sealing effect of the sealed cavity 3; the inner diameter of the end cover 6 and the outer diameter of the piston rod 2 are coaxial, and the sealing effect of the sealing ring 1 is required to be good, so as to ensure the sealing effect of the sealed cavity 1; the support disc 3 is provided with a groove inside, so that the support wheel 1 can be completely placed in the groove inside the support disc 3 when being retracted; the upper end and the lower end of the cylinder body 7 are respectively provided with an oil channel 14 and an oil channel 15; the upper end of the piston rod 2 is provided with an oil channel 16; the oil channel 16 can be provided with a plurality of small-diameter oil channels around the piston rod 2 without affecting the stroke of the piston 8.

[0024] In combination Figure 3 , when the support disc 3 supports the ground, the oil channel 14 enters the pressure oil, the piston 12 moves downward, the spring 13 is in a free state, the oil channel 15 and the oil channel 16 are in a back pressure state or a leading pressure state, the spring 10 is in a free state after contraction, the piston 8 moves upward, the support wheel 1 returns to the groove inside the support disc 3, and the support disc 3 supports the ground. Figure 2

[0025] In combination Figure 4 ​When the hydraulic cylinder based on hydraulic control and capable of self-adaptable switching support mode supports the ground by the support wheel 1, the oil channel two 15 and the oil channel three 16 enter the pressure oil, the piston two 12 moves upwards and slowly compresses the spring two 13, when the force of the compressed spring two 13 on the upper surface of the piston two 12 is equal to the hydraulic pressure on the lower surface of the piston two 12, the piston one 8 moves downwards, the support wheel 1 is stretched out from the lower surface of the support disc 3 under the driving of the piston rod one 2 and moves downwards, and the spring one 10 is stretched, when the tension of the spring one 10 on the upper surface of the piston one 8 is equal to the hydraulic pressure on the upper surface of the piston one 8 and the support force of the ground on the support wheel 1, the support wheel 1 supports the ground. At the same time, the support wheel 1 can rotate in the state of being stretched.

Claims

1. A hydraulic cylinder with adaptively switchable support modes based on hydraulic control, characterized in that: The cylinder includes a hollow cylinder body (7), inside which is a hollow piston rod two (4), inside which is a piston rod one (2), an end cap (6) is provided at the bottom of the cylinder body (7), a support plate (3) is provided at the bottom of the piston rod two (4), one end of the piston rod one (2) passes through the support plate (3) and is connected to a support wheel (1), one end of the piston rod two (4) located inside the cylinder body (7) is connected to a piston two (12), and one end of the piston rod one (2) located inside the piston rod two (4) is connected to a piston two (12). A piston is connected to a piston (8), and a spring (10) is provided inside the piston rod (4). One end of the spring (10) is fixedly connected to the piston (2) and the other end is fixedly connected to the piston (8). A spring (2) is provided at the top of the inner side of the cylinder (7). The top of the spring (2) is fixedly connected to the cylinder (7). An oil passage (14) and an oil passage (2) are provided at the upper and lower ends of one side of the cylinder (7), respectively. An oil passage (3) is provided at the upper end of one side of the piston rod (4).

2. The hydraulic cylinder with adaptive switchable support mode based on hydraulic control according to claim 1, characterized in that: The axes of the cylinder (7), piston rod one (2) and piston rod two (4) are located on the same straight line.

3. A hydraulic cylinder with adaptive switchable support mode based on hydraulic control according to claim 1, characterized in that: The outer diameter of piston one (8) matches the inner diameter of piston rod two (4).

4. A hydraulic cylinder with adaptive switchable support mode based on hydraulic control according to claim 1, characterized in that: The outer diameter of the piston (12) matches the inner diameter of the cylinder (7).

5. A hydraulic cylinder with adaptive switchable support mode based on hydraulic control according to claim 1, characterized in that: The end cap (6) is provided with a sealing ring (5).

6. A hydraulic cylinder with adaptive switchable support mode based on hydraulic control according to claim 1, characterized in that: The piston (8) is provided with a sealing ring (9).

7. A hydraulic cylinder with adaptive switchable support mode based on hydraulic control according to claim 1, characterized in that: The piston 2 (12) is provided with a sealing ring 3 (11).

8. A hydraulic cylinder with adaptive switchable support mode based on hydraulic control according to claim 1, characterized in that: The support plate (3) has a groove inside.

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