High-sealing-performance multi-stage hydraulic oil cylinder

Abstract

The utility model relates to the technical field of multi-stage hydraulic oil cylinders, in particular to a high-sealing-performance multi-stage hydraulic oil cylinder which is characterized in that an upper end limiting ring and a lower end limiting ring are arranged on the surface of a hydraulic oil cylinder body, a limiting inner groove is formed between the upper end limiting ring and the lower end limiting ring, and a chassis is fixed to the lower end of the hydraulic oil cylinder body. The first lantern ring is rotationally connected to the connecting column, a second lantern ring is arranged beside the first lantern ring, the second lantern ring is rotationally connected to the connecting column, side square blocks are arranged on the surfaces of the first lantern ring and the second lantern ring, and side supporting rods are arranged in the side square blocks; the hydraulic oil cylinder has the beneficial effects that an upper end limiting ring, a lower end limiting ring, a first lantern ring, a second lantern ring, a side square block, a connecting rod, a side supporting rod and a supporting base are arranged, a hydraulic oil cylinder body is effectively supported, the hydraulic oil cylinder is prevented from shaking in the using process, meanwhile, a threaded rod and a hexagonal nut are used, and the using effect is good. And the first lantern ring and the second lantern ring are convenient to mount and dismount, so that the device is convenient to overhaul and maintain.

Description

Technical Field

[0001] The utility model relates to the field of multi-stage hydraulic oil cylinders, in particular to a high-sealing multi-stage hydraulic oil cylinder. Background Art

[0002] Telescopic hydraulic cylinder is also called multi-stage hydraulic cylinder. It is composed of two or more stages of piston cylinders. It is mainly composed of cylinder head, cylinder barrel, sleeve, piston and other parts. There are oil inlet and outlet ports A and B at both ends of the cylinder barrel.

[0003] When oil enters port A and returns to port B, the first-stage piston with a larger effective area is pushed to move first, and then the second-stage piston with a smaller effective area is pushed to move. Because the flow entering port A remains unchanged, the piston with a larger effective area has a low movement speed and a large thrust, and vice versa. The movement speed is high and the thrust is small. If oil enters port B and returns to port A, the second-stage piston will retreat to the end point first, and then the first-stage piston will retreat.

[0004] In the prior art, the multi-stage cylinder has the characteristics of long stroke and small installation position. However, due to the long stroke, it is easy to shake or even tip over during the operation, which poses certain safety hazards. Therefore, the utility model provides a high-sealing multi-stage hydraulic cylinder to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a high-sealing multi-stage hydraulic cylinder to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-sealing multi-stage hydraulic cylinder, the high-sealing multi-stage hydraulic cylinder comprising: a hydraulic cylinder body, the surface of the hydraulic cylinder body is provided with an upper limit ring and a lower limit ring, a limit inner groove is formed between the upper limit ring and the lower limit ring, and a chassis is fixed to the lower end of the hydraulic cylinder body.

[0007] A first ring is rotatably connected to a connecting column, a second ring is arranged beside the first ring, and the second ring is rotatably connected to the connecting column, side blocks are arranged on the surfaces of the first ring and the second ring, side support rods are arranged in the side blocks, and a support base is fixed to the bottom of the side support rods.

[0008] Preferably, the upper limit ring and the lower limit ring are both fixed to the surface of the hydraulic cylinder body, and the upper limit ring is located directly above the lower limit ring.

[0009] Preferably, a first rubber pad is laid inside the upper limit ring, and a second rubber pad is laid inside the lower limit ring. The end faces of the upper limit ring and the lower limit ring are both provided with connecting holes, and a threaded rod is provided in the connecting hole. Buffer washers and hexagonal nuts are provided at both ends of the threaded rod.

[0010] Preferably, the upper limit ring and the lower limit ring are both semicircular, and four groups of side blocks are provided, and the four groups of side blocks are evenly distributed on the surface of the upper limit ring and the lower limit ring.

[0011] Preferably, a connecting rod is fixed to the upper end of the side support rod, and the connecting rod is fixedly connected to the side block.

[0012] Preferably, threaded mounting holes are provided on the surface of the support base, and three groups of threaded mounting holes are provided. The three groups of threaded mounting holes are evenly distributed on the surface of the support base.

[0013] Preferably, the first ring and the second ring are located in the limiting inner groove.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model proposes a high-sealing multi-stage hydraulic cylinder, which utilizes an upper limit ring, a lower limit ring, a first set of rings, a second set of rings, a side block, a connecting rod, a side support rod and a supporting base to achieve effective support for the hydraulic cylinder body and prevent the hydraulic cylinder from shaking during use. At the same time, the threaded rod and the hexagonal nut are utilized to facilitate installation and disassembly of the first set of rings and the second set of rings, so as to facilitate inspection and maintenance of the device, thus avoiding the characteristics of the multi-stage cylinder having a long stroke and a small installation position. However, due to the long stroke, it is easy to shake or even tip over during the action, which poses a certain safety hazard. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a side view of the structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the upper limit ring and the lower limit ring of the structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the first set of rings and the second set of rings of the utility model structure.

[0020] In the figure: 1, hydraulic cylinder body; 2, first set of rings; 3, connecting rod; 4, side support rod; 5, threaded mounting hole; 6, support base; 7, chassis; 8, second set of rings; 9, upper end limit ring; 10, side block; 11, connecting column; 12, lower end limit ring; 13, limit inner groove; 14, first rubber pad;

[0021] 15. Second rubber pad; 16. Connecting hole; 17. Threaded rod; 18. Buffer washer; 19. Hexagonal nut. DETAILED DESCRIPTION

[0022] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment 1

[0024] See also Figure 1-Figure 4 The utility model provides a technical solution: a high-sealing multi-stage hydraulic cylinder, the high-sealing multi-stage hydraulic cylinder comprising: a hydraulic cylinder body 1, an upper limit ring 9 and a lower limit ring 12 are arranged on the surface of the hydraulic cylinder body 1, a limit inner groove 13 is formed between the upper limit ring 9 and the lower limit ring 12, and a chassis 7 is fixed to the lower end of the hydraulic cylinder body 1;

[0025] A first ring 2, the first ring 2 is rotatably connected to the connecting column 11, a second ring 8 is provided next to the first ring 2, the second ring 8 is rotatably connected to the connecting column 11, the surfaces of the first ring 2 and the second ring 8 are provided with side blocks 10, a side support rod 4 is provided in the side block 10, and a support base 6 is fixed to the bottom of the side support rod 4;

[0026] When in use, the upper limit ring 9, the lower limit ring 12, the first ring 2, the second ring 8, the side block 10, the connecting rod 3, the side support rod 4 and the support base 6 are used to effectively support the hydraulic cylinder body 1 to prevent the hydraulic cylinder from shaking during use. At the same time, the threaded rod 17 and the hexagonal nut 19 are used to facilitate the installation and disassembly of the first ring 2 and the second ring 8, which facilitates the inspection and maintenance of the device.

[0027] Embodiment 2

[0028] On the basis of the first embodiment, the upper stop ring 9 and the lower stop ring 12 are both fixed to the surface of the hydraulic cylinder body 1, the upper stop ring 9 is located directly above the lower stop ring 12, and the end faces of the upper stop ring 9 and the lower stop ring 12 are both provided with a connecting hole 16, a threaded rod 17 is provided in the connecting hole 16, and buffer washers 18 and hexagonal nuts 19 are provided at both ends of the threaded rod 17;

[0029] The upper limit ring 9 and the lower limit ring 12 are both semicircular, and the side blocks 10 are provided with four groups, and the four groups of side blocks 10 are evenly distributed on the surface of the upper limit ring and the lower limit ring. The upper end of the side support rod 4 is fixed with a connecting rod 3, and the connecting rod 3 is fixedly connected to the side block 10. The surface of the support base 6 is provided with a threaded mounting hole 5, and the threaded mounting hole 5 is provided with three groups, and the three groups of threaded mounting holes 5 are evenly distributed on the surface of the support base 6;

[0030] When in use, first install the first collar 2 and the second collar 8 in the limiting inner groove 13, and tighten the first collar 2 and the second collar 8 through the threaded rod 17 and the hexagonal nut 19, so that the first collar 2 and the second collar 8 are tightly installed in the limiting inner groove 13, and then use the threaded mounting hole 5 and the mounting rod to fix the support base 6 to the construction ground. The four sets of side support rods 4 and the support base 6 are evenly distributed around the hydraulic cylinder body 1, thereby providing effective support to prevent the hydraulic cylinder body 1 from shaking;

[0031] At the same time, under the restriction of the upper limit ring 9 and the lower limit ring 12, the first ring 2 and the second ring 8 are prevented from slipping. The provided chassis 7 can increase the contact area between the bottom of the hydraulic cylinder and the ground, thereby improving stability. By removing the hexagonal nut 19 and the threaded rod 17, that is, removing the first ring 2 and the second ring 8, the device can be easily inspected and maintained, and the operation is convenient.

[0032] Embodiment 3

[0033] On the basis of the second embodiment, a first rubber pad 14 is laid inside the upper stop ring 9, and a second rubber pad 15 is laid inside the lower stop ring 12;

[0034] When in use, the first rubber pad 14 and the second rubber pad 15 can prevent the first ring 2 and the second ring 8 from directly contacting the hydraulic cylinder, thereby protecting the hydraulic cylinder, and can also provide buffering and improve stability.

[0035] In actual use, first install the first collar 2 and the second collar 8 in the limiting inner groove 13, and tighten the first collar 2 and the second collar 8 through the threaded rod 17 and the hexagonal nut 19, so that the first collar 2 and the second collar 8 are tightly installed in the limiting inner groove 13, and then use the threaded mounting hole 5 and the mounting rod to fix the support base 6 to the construction ground. The four sets of lateral support rods 4 and the support base 6 are evenly distributed around the hydraulic cylinder body 1, thereby providing effective support to prevent the hydraulic cylinder body 1 from shaking. At the same time, the upper limit Under the restriction of the positioning ring 9 and the lower end limiting ring 12, the first ring 2 and the second ring 8 are prevented from slipping. The provided chassis 7 can increase the contact area between the bottom of the hydraulic cylinder and the ground and improve the stability. By removing the hexagonal nut 19 and the threaded rod 17, that is, removing the first ring 2 and the second ring 8, it is convenient to inspect and maintain the device, and the operation is convenient. This avoids the characteristics of the multi-stage cylinder with a long stroke and a small installation position. However, due to the long stroke, it is easy to shake or even tip over during the action, which poses a certain safety hazard.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-sealing multi-stage hydraulic cylinder, characterized in that: The multi-stage hydraulic cylinder with high sealing performance comprises: a hydraulic cylinder body (1), an upper limit ring (9) and a lower limit ring (12) are arranged on the surface of the hydraulic cylinder body (1), a limit inner groove (13) is formed between the upper limit ring (9) and the lower limit ring (12), and a chassis (7) is fixed to the lower end of the hydraulic cylinder body (1); A first sleeve ring (2) is rotatably connected to a connecting column (11), a second sleeve ring (8) is arranged beside the first sleeve ring (2), the second sleeve ring (8) is rotatably connected to the connecting column (11), side blocks (10) are arranged on the surfaces of the first sleeve ring (2) and the second sleeve ring (8), a side support rod (4) is arranged inside the side block (10), and a support base (6) is fixed to the bottom of the side support rod (4).

2. A high-sealing multi-stage hydraulic cylinder according to claim 1, characterized in that: The upper end limiting ring (9) and the lower end limiting ring (12) are both fixed to the surface of the hydraulic cylinder body (1), and the upper end limiting ring (9) is located directly above the lower end limiting ring (12).

3. A high-sealing multi-stage hydraulic cylinder according to claim 2, characterized in that: A first rubber pad (14) is laid inside the upper end limiting ring (9), and a second rubber pad (15) is laid inside the lower end limiting ring (12). The end faces of the upper end limiting ring (9) and the lower end limiting ring (12) are both provided with connecting holes (16), a threaded rod (17) is arranged in the connecting hole (16), and buffer washers (18) and hexagonal nuts (19) are arranged at both ends of the threaded rod (17).

4. The high-sealing multi-stage hydraulic cylinder according to claim 1, characterized in that: The upper limit ring (9) and the lower limit ring (12) are both semicircular, and four groups of side blocks (10) are provided. The four groups of side blocks (10) are evenly distributed on the surface of the upper limit ring and the lower limit ring.

5. The high-sealing multi-stage hydraulic cylinder according to claim 1, characterized in that: A connecting rod (3) is fixed to the upper end of the lateral support rod (4), and the connecting rod (3) is fixedly connected to the lateral block (10).

6. The high-sealing multi-stage hydraulic cylinder according to claim 1, characterized in that: The surface of the support base (6) is provided with threaded mounting holes (5), and the threaded mounting holes (5) are provided in three groups, and the three groups of threaded mounting holes (5) are evenly distributed on the surface of the support base (6).

7. The high-sealing multi-stage hydraulic cylinder according to claim 1, characterized in that: The first sleeve ring (2) and the second sleeve ring (8) are located in the limiting inner groove (13).

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