Large-stroke hydraulic cylinder

Abstract

The large-stroke hydraulic cylinder comprises a first cylinder cover, a first liquid pipe and a second liquid pipe are installed on the side face of the first cylinder cover, hydraulic cylinder mechanisms are connected to the two ends of the first cylinder cover through threads, and one end of each hydraulic cylinder mechanism is connected with a second cylinder cover through threads. A third liquid pipe and a fourth liquid pipe are installed on the second cylinder covers on the two sides correspondingly, sealing ring mechanisms are installed on the second cylinder covers on the two sides correspondingly, and the hydraulic cylinder mechanism penetrates through the sealing ring mechanisms and is connected with a connecting base. Compared with the prior art, the first liquid pipe, the second liquid pipe, the third liquid pipe and the fourth liquid pipe are arranged, the first liquid pipe and the fourth liquid pipe are matched to inject liquid into the hydraulic cylinder on one side, and the second liquid pipe and the third liquid pipe are matched to inject liquid into the liquid pipe on the other side. Operation of the hydraulic cylinder mechanisms at the two ends can be controlled synchronously or respectively, large-stroke driving can be conveniently, accurately and flexibly carried out, and the device is simple in structure and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a large-stroke hydraulic cylinder. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation. When using it to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap and the movement is smooth. Therefore, it is widely used in the hydraulic systems of various machines.

[0003] In actual use, in order to achieve long-stroke driving, the hydraulic cylinder needs to be adjusted in multiple stages, among which double-axis hydraulic cylinders are more widely used. However, the double-axis hydraulic cylinder has a complex structure and requires two different hydraulic oil media. It is very difficult to install and maintain, and there are certain shortcomings in its use. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a large-stroke hydraulic cylinder.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A long-stroke hydraulic cylinder comprises a first cylinder head, a first liquid pipe and a second liquid pipe are installed on the side of the first cylinder head, both ends of the first cylinder head are connected to a hydraulic cylinder mechanism through threads, one end of the hydraulic cylinder mechanism is connected to the second cylinder head through threads, a third liquid pipe and a fourth liquid pipe are installed on the second cylinder heads on both sides respectively, a sealing ring mechanism is installed on the second cylinder heads on both sides, and the hydraulic cylinder mechanism penetrates the sealing ring mechanism and is connected to a connecting seat;

[0007] The hydraulic cylinder mechanism includes an outer cylinder body connected to the two ends of a first cylinder cover by threads, the outer cylinder body is connected to the second cylinder cover by threads, the two ends of the outer cylinder body are fixedly sleeved with a first sealing sleeve, the inner cylinder body is fixed inside the outer cylinder body, the two ends of the inner cylinder body are fixed with limiting rings, the inner cylinder body is slidably connected with a piston, the two ends of the piston are sleeved with a second sealing sleeve, and the side of the piston is fixed with a piston rod.

[0008] Preferably, first mounting plates are fixed to both ends of the first cylinder cover, a second mounting plate is fixedly sleeved on the second cylinder cover, and threaded columns are mounted on the first mounting plate and the second mounting plate.

[0009] Preferably, the piston is located between two limiting rings, and the piston rod passes through the sealing ring mechanism and is connected to the connecting seat.

[0010] Preferably, the sealing ring mechanism comprises a sealing ring fixed on the second cylinder head, a first scraper ring and a second scraper ring are fixed at both ends of the sealing ring, and the sealing ring, the first scraper ring and the second scraper ring are all slidably connected to the piston rod.

[0011] Preferably, solenoid valves are installed inside the first liquid pipe, the second liquid pipe, the third liquid pipe and the fourth liquid pipe.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model provides a first liquid pipe, a second liquid pipe, a third liquid pipe and a fourth liquid pipe, and the first liquid pipe and the fourth liquid pipe cooperate to inject liquid into the hydraulic cylinder on one side, and the second liquid pipe and the third liquid pipe cooperate to inject liquid into the liquid pipe on the other side. In actual use, the operation of the hydraulic cylinder mechanisms at both ends can be controlled synchronously or separately, which is convenient for accurate and flexible long-stroke driving. The device has a simple structure and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a large-stroke hydraulic cylinder proposed by the utility model;

[0015] Figure 2 for Figure 1 A top cross-sectional view of

[0016] Figure 3 for Figure 1 Cross-sectional view of the hydraulic cylinder mechanism.

[0017] In the figure: 1 first cylinder head, 2 first liquid pipe, 3 second liquid pipe, 4 first mounting plate, 5 hydraulic cylinder mechanism, 51 outer cylinder body, 52 first sealing sleeve, 53 inner cylinder body, 54 limiting ring, 55 piston, 56 second sealing sleeve, 57 piston rod, 6 threaded column, 7 second cylinder head, 8 second mounting plate, 9 third liquid pipe, 10 sealing ring mechanism, 101 sealing ring, 102 first scraper ring, 103 second scraper ring, 11 connecting seat, 12 fourth liquid pipe. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Reference Figure 1-3A long-stroke hydraulic cylinder comprises a first cylinder head 1, a first liquid pipe 2 and a second liquid pipe 3 are installed on the side of the first cylinder head 1, both ends of the first cylinder head 1 are connected to a hydraulic cylinder mechanism 5 by threads, one end of the hydraulic cylinder mechanism 5 is connected to a second cylinder head 7 by threads, a third liquid pipe 9 and a fourth liquid pipe 12 are installed on the second cylinder heads 7 on both sides, a first mounting plate 4 is fixed on both ends of the first cylinder head 1, a second mounting plate 8 is fixedly sleeved on the second cylinder head 7, and the first mounting plate 4 and the second mounting plate 8 are installed There is a threaded column 6, and a sealing ring mechanism 10 is installed on the second cylinder head 7 on both sides. The hydraulic cylinder mechanism 5 passes through the sealing ring mechanism 10 and is connected to the connecting seat 11. The hydraulic cylinder mechanism 5 includes an outer cylinder body 51 connected to both ends of the first cylinder head 1 by threads. The outer cylinder body 51 is connected to the second cylinder head 7 by threads. Both ends of the outer cylinder body 51 are fixedly sleeved with a first sealing sleeve 52. The inner cylinder body 53 is fixed inside the outer cylinder body 51. The two ends of the inner cylinder body 53 are fixed with a limit ring 54. The inner sliding part of the inner cylinder body 53 The piston 55 is dynamically connected, and the two ends of the piston 55 are sleeved with a second sealing sleeve 56. A piston rod 57 is fixed on the side of the piston 55. The piston 55 is located between the two limit rings 54. The piston rod 57 penetrates the sealing ring mechanism 10 and is connected to the connecting seat 11. The sealing ring mechanism 10 includes a sealing ring 101 fixed on the second cylinder head 7. The two ends of the sealing ring 101 are fixed with a first scraper ring 102 and a second scraper ring 103. The sealing ring 101, the first scraper ring 102 and the second scraper ring 103 are all slidably connected to the piston rod 57. Solenoid valves are installed inside the first liquid pipe 2, the second liquid pipe 3, the third liquid pipe 9 and the fourth liquid pipe 12. By setting the first liquid pipe, the second liquid pipe, the third liquid pipe and the fourth liquid pipe, the first liquid pipe and the fourth liquid pipe cooperate to inject liquid into the hydraulic cylinder on one side, and the second liquid pipe and the third liquid pipe cooperate to inject liquid into the liquid pipe on the other side. In actual use, the operation of the hydraulic cylinder mechanisms at both ends can be controlled synchronously or separately, which is convenient and flexible to drive a large stroke. The device has a simple structure and is easy to use.

[0020] When in use, the first liquid pipe 2, the second liquid pipe 3, the third liquid pipe 9 and the fourth liquid pipe 12 are respectively connected to the hydraulic oil supply device, and the hydraulic cylinder mechanism 5 is filled with hydraulic oil. When in use, the hydraulic oil is injected through the first liquid pipe 2 and the second liquid pipe 3 at the same time, and the hydraulic oil is recovered through the third liquid pipe 9 and the fourth liquid pipe 12. After the hydraulic oil enters the first cylinder head 1, it enters the internal hydraulic oil of the hydraulic cylinder mechanism 5 on both sides to push the piston 55 and the piston rod 57 to move, so that the piston rods 57 on both sides are extended synchronously. In addition, it is also possible to choose to inject hydraulic oil through the first liquid pipe 2 and recover hydraulic oil through the third liquid pipe 9, inject hydraulic oil through the third liquid pipe 3 and recover hydraulic oil through the fourth liquid pipe 12, so as to realize the extension of the single-sided piston rod 57. In this process, the sealing ring mechanism 10 improves the sealing performance between the second cylinder head 7 and the piston rod 57, and at the same time, uses the first scraper ring 102 and the second scraper ring 103 to clean the piston rod 57. The device has a simple structure and is very convenient to use.

[0021] To sum up, compared with the prior art, the utility model sets the first liquid pipe, the second liquid pipe, the third liquid pipe and the fourth liquid pipe, and the first liquid pipe and the fourth liquid pipe cooperate to inject liquid into the hydraulic cylinder on one side, and the second liquid pipe and the third liquid pipe cooperate to inject liquid into the liquid pipe on the other side. In actual use, the operation of the hydraulic cylinder mechanisms at both ends can be controlled synchronously or separately, which is convenient for accurate and flexible large-stroke driving, and the device has a simple structure and is easy to use.

[0022] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A long-stroke hydraulic cylinder, comprising a first cylinder head (1), characterized in that: A first liquid pipe (2) and a second liquid pipe (3) are installed on the side of the first cylinder head (1); both ends of the first cylinder head (1) are connected to a hydraulic cylinder mechanism (5) through threads; one end of the hydraulic cylinder mechanism (5) is connected to a second cylinder head (7) through threads; a third liquid pipe (9) and a fourth liquid pipe (12) are installed on the second cylinder heads (7) on both sides, respectively; a sealing ring mechanism (10) is installed on the second cylinder heads (7) on both sides; the hydraulic cylinder mechanism (5) penetrates the sealing ring mechanism (10) and is connected to a connecting seat (11); The hydraulic cylinder mechanism (5) comprises an outer cylinder body (51) connected to both ends of a first cylinder cover (1) by threads, the outer cylinder body (51) being connected to a second cylinder cover (7) by threads, both ends of the outer cylinder body (51) being fixedly sleeved with a first sealing sleeve (52), an inner cylinder body (53) being fixed inside the outer cylinder body (51), both ends of the inner cylinder body (53) being fixed with a limit ring (54), a piston (55) being slidably connected inside the inner cylinder body (53), both ends of the piston (55) being sleeved with a second sealing sleeve (56), and a piston rod (57) being fixed to the side of the piston (55).

2. A long-stroke hydraulic cylinder according to claim 1, characterized in that: A first mounting plate (4) is fixed to both ends of the first cylinder cover (1), a second mounting plate (8) is fixedly sleeved on the second cylinder cover (7), and threaded columns (6) are mounted on the first mounting plate (4) and the second mounting plate (8).

3. A long-stroke hydraulic cylinder according to claim 1, characterized in that: The piston (55) is located between the two limiting rings (54), and the piston rod (57) passes through the sealing ring mechanism (10) and is connected to the connecting seat (11).

4. A long-stroke hydraulic cylinder according to claim 3, characterized in that: The sealing ring mechanism (10) comprises a sealing ring (101) fixed on the second cylinder head (7), a first scraper ring (102) and a second scraper ring (103) being fixed at both ends of the sealing ring (101), and the sealing ring (101), the first scraper ring (102) and the second scraper ring (103) are all slidably connected to the piston rod (57).

5. A long-stroke hydraulic cylinder according to claim 1, characterized in that: Solenoid valves are installed inside the first liquid pipe (2), the second liquid pipe (3), the third liquid pipe (9) and the fourth liquid pipe (12).

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