A cylinder structure of a master-slave hydraulic cylinder

Abstract

The utility model relates to the technical field of primary and secondary hydraulic cylinders, and particularly relates to a cylinder body structure of a primary and secondary hydraulic cylinder, which comprises a primary cylinder and a secondary cylinder slidably connected in the primary cylinder, and the primary cylinder is rotatably connected with an end cover at one end, further comprising a first threaded groove, which is arranged at one end of the outer surface of the primary cylinder, a fastening assembly is arranged at one end of the primary cylinder, the fastening assembly comprises a mounting cover movably arranged at one end of the primary cylinder, the mounting cover is rotatably connected with the first threaded groove, a quick rod is movably inserted into the mounting cover, and the outer surface of the mounting cover is provided with a second oil hole. In the utility model, the mounting cover rotatably connected with the end of the primary cylinder is disassembled, the end of the primary cylinder is exposed, the hexagonal hollow nut arranged at one end of the piston is screwed by means of the internal hex sleeve, the piston is disassembled from one end of the secondary cylinder, the piston is removed from the end of the primary cylinder, and the sealing ring of the piston is replaced, so that the disassembly difficulty during replacement of the sealing ring of the piston is reduced, and the equipment downtime during maintenance and replacement is reduced.

Description

Technical Field

[0001] This utility model relates to the field of master-slave hydraulic cylinder technology, specifically a cylinder body structure for a master-slave hydraulic cylinder. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy to perform linear reciprocating motion (or oscillating motion). It has a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device and has no transmission backlash, resulting in smooth movement. Therefore, it is widely used in the hydraulic systems of various machines. A master-slave hydraulic cylinder consists of a large hydraulic cylinder with a smaller hydraulic cylinder inside its piston rod; these two cylinders can be controlled independently.

[0003] In existing master-slave hydraulic cylinders, the quick rod (slave cylinder piston rod) is usually rigidly connected to the end flange of the master cylinder. Due to the structural constraints of the slave cylinder piston, the slave cylinder assembly process requires insertion and installation from the master cylinder. This means that when replacing the piston seal ring, the end cover of the master cylinder must be removed, the connection between the slave cylinder and the equipment must be disconnected, and the entire slave cylinder assembly must be pulled out of the master cylinder cavity. This disassembly process involves multiple disassembly operations, making it inconvenient to directly disassemble the quick rod and slave cylinder piston from the end of the master cylinder. Utility Model Content

[0004] The purpose of this utility model is to provide a cylinder body structure for a master-slave hydraulic cylinder to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A cylinder body structure for a master-slave hydraulic cylinder includes a master cylinder and a slave cylinder slidably connected inside the master cylinder. One end of the master cylinder is screwed onto an end cap. The cylinder also includes:

[0007] The No. 1 thread groove is located at one end of the outer surface of the mother cylinder;

[0008] A fastening assembly is provided at one end of the female cylinder. The fastening assembly includes a mounting cover movably provided at one end of the female cylinder. The mounting cover is screwed into a first threaded groove. A quick rod is movably inserted inside the mounting cover. A second oil hole is provided on the outer surface of the mounting cover.

[0009] Furthermore, a flange is fixedly installed at the other end of the outer surface of the mother cylinder, and an oil hole is provided on the outer surface of the mother cylinder on one side of the flange.

[0010] Furthermore, a second flange is fixedly installed at one end of the sub-cylinder, and a piston is screwed onto the other end of the outer surface of the sub-cylinder. The piston is in movable contact with the inner wall of the mother cylinder, and a hexagonal hollow nut is fixedly installed on one end of the piston.

[0011] Furthermore, the inner surface of the mounting cover is provided with a second threaded groove, and a fastening threaded sleeve is fixedly installed on the outer surface of the quick rod, the fastening threaded sleeve being screwed into the second threaded groove.

[0012] Furthermore, the quick rod slides through the mounting cover and the sub-cylinder, and a sealing ring is movably embedded in the inner surface of the mounting cover, with the inner wall of the sealing ring in movable contact with the quick rod.

[0013] Furthermore, the outer surface of the mounting cover is provided with a No. 3 threaded groove, and a bolt is screwed into the No. 3 threaded groove.

[0014] Preferably, a limiting hole is provided at one end of the outer surface of the mother cylinder, and the bolt passes through the No. 3 threaded groove and is movably inserted into the limiting hole.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. By tightening the fastening threaded sleeve, it and the quick rod connected to it are disassembled from inside the mounting cover. Then, tighten the mounting cover to remove it. At this time, one end of the female cylinder is exposed to the outside. Insert the internal hexagonal socket into the female cylinder from one end and tighten the hexagonal hollow nut to remove the piston from the outside of the female cylinder. Then, remove the piston from one end of the female cylinder. By exposing the end of the female cylinder, the piston can be disassembled from one end of the female cylinder and removed from the end of the female cylinder to replace the piston seal. This reduces the disassembly difficulty when replacing the piston seal and reduces equipment downtime during maintenance and replacement.

[0017] 2. After the cover is screwed on and tightened, tighten the bolt and insert one end of the bolt into the limiting hole to limit the cover and prevent it from rotating, thus improving the cover's stability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the vertical cross-sectional structure of the mother cylinder and the mounting cover in this utility model;

[0020] Figure 3 This is a schematic diagram of the overall disassembled structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the vertical cross-sectional structure of the fastening component in this utility model.

[0022] In the diagram: 1. Mother cylinder; 101. End cap; 102. Oil hole No. 1; 103. Flange No. 1; 104. Limiting hole; 105. Threaded groove No. 1; 2. Daughter cylinder; 201. Flange No. 2; 202. Piston; 203. Hexagonal hollow nut; 3. Fastening assembly; 301. Mounting cover; 302. Oil hole No. 2; 303. Threaded groove No. 2; 304. Fastening threaded sleeve; 305. Quick rod; 306. Sealing ring; 307. Bolt; 308. Threaded groove No. 3. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 In this embodiment of the present invention, a cylinder body structure of a master-slave hydraulic cylinder includes a master cylinder 1 and a slave cylinder 2 slidably connected inside the master cylinder 1. One end of the master cylinder 1 is screwed with an end cap 101, and a first flange 103 is fixedly installed at the other end of the outer surface of the master cylinder 1. The first flange 103 is connected to the required equipment by fasteners, allowing the master cylinder 1 to penetrate the surface to be installed. An oil hole 102 and a threaded groove 105 are provided on one side of the first flange 103 on the outer surface of the master cylinder 1. A fastening assembly 3 is located at one end of the outer surface of the mother cylinder 1. The fastening assembly 3 includes a mounting cover 301 movably located at one end of the mother cylinder 1. The mounting cover 301 is screwed into the first threaded groove 105. A quick rod 305 is movably inserted inside the mounting cover 301. The quick rod 305 is existing technology and will not be described in detail. A second oil hole 302 is provided on the outer surface of the mounting cover 301. The first oil hole 102 and the second oil hole 302 are connected to the oil tank of the hydraulic system.

[0025] Specifically, fastening component 3 seals one end of mother cylinder 1, and at the same time fixes quick rod 305 to one end of mother cylinder 1, so that quick rod 305 can be disassembled. Also, by removing the mounting cover 301, it is convenient to operate the piston 202 inside mother cylinder 1.

[0026] Example 1

[0027] like Figure 2As shown, in this embodiment, a second flange 201 is fixedly installed at one end of the sub-cylinder 2. The second flange 201 is used to connect the machine to be connected. A piston 202 is screwed onto the other end of the outer surface of the sub-cylinder 2, and the piston 202 is movably fitted against the inner wall of the mother cylinder 1. A hexagonal hollow nut 203 is fixedly installed on one end surface of the piston 202. The hexagonal hollow nut 203 makes it easy to disassemble and install the piston 202.

[0028] In this embodiment, the piston 202 is disassembled when the hexagonal hollow nut 203 is turned by screwing the piston 202 into the sub-cylinder 2.

[0029] like Figure 3 and Figure 4 As shown, in this embodiment, a second threaded groove 303 is provided on the inner surface of the mounting cover 301, and a fastening threaded sleeve 304 is fixedly installed on the outer surface of the quick rod 305. The fastening threaded sleeve 304 is screwed into the second threaded groove 303. The quick rod 305 slides through the mounting cover 301 and the sub-cylinder 2. A sealing ring 306 is movably embedded in the inner surface of the mounting cover 301, and the inner wall of the sealing ring 306 is movably fitted with the quick rod 305.

[0030] In practice, tighten the fastening threaded sleeve 304, and through its engagement with the second threaded groove 303, disassemble it and the quick rod 305 connected to it from inside the mounting cover 301. Then, tighten the mounting cover 301, and through its engagement with the first threaded groove 105, disassemble it. At this time, one end of the mother cylinder 1 is exposed to the outside. Insert the internal hexagonal sleeve into the mother cylinder 1 from one end of the mother cylinder 1, and tighten the hexagonal hollow nut 203 to disassemble the piston 202 from the outside of the daughter cylinder 2. Then, remove the piston 202 from one end of the mother cylinder 1. By exposing the end of the mother cylinder 1, the piston 202 is disassembled from one end of the daughter cylinder 2 and removed from the end of the mother cylinder 1. The sealing ring of the piston 202 is then replaced, reducing the disassembly difficulty when replacing the piston 202 sealing ring and reducing equipment downtime during maintenance and replacement.

[0031] Example 2

[0032] Based on Example 1, in order to compensate for the problem that the mounting cover 301 is prone to loosening after being screwed on, resulting in hydraulic oil leakage.

[0033] like Figure 4 As shown, in this embodiment, the outer surface of the mounting cover 301 is provided with a No. 3 threaded groove 308, and a bolt 307 is screwed into the No. 3 threaded groove 308; a limiting hole 104 is provided at one end of the outer surface of the mother cylinder 1, and the bolt 307 passes through the No. 3 threaded groove 308 and is movably inserted into the limiting hole 104.

[0034] In practice, after the mounting cover 301 is screwed and tightened, the bolt 307 is screwed into the limiting hole 104 through the engagement of the No. 3 threaded groove 308 and the bolt 307 to limit the mounting cover 301, prevent the mounting cover 301 from rotating, and improve the firmness of the mounting cover 301.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cylinder body structure of a master-slave hydraulic cylinder, comprising a master cylinder (1) and a slave cylinder (2) slidably connected inside the master cylinder (1), wherein one end of the master cylinder (1) is screwed with an end cap (101), characterized in that, Also includes: The first thread groove (105) is opened at one end of the outer surface of the mother cylinder (1); Fastening assembly (3) is provided at one end of the mother cylinder (1). The fastening assembly (3) includes a mounting cover (301) movably provided at one end of the mother cylinder (1). The mounting cover (301) is screwed into a first threaded groove (105). A quick rod (305) is movably inserted inside the mounting cover (301). A second oil hole (302) is provided on the outer surface of the mounting cover (301).

2. The cylinder body structure of the master-slave hydraulic cylinder according to claim 1, characterized in that, A flange (103) is fixedly installed at the other end of the outer surface of the mother cylinder (1), and an oil hole (102) is provided on the outer surface of the mother cylinder (1) on one side of the flange (103).

3. The cylinder body structure of the master-slave hydraulic cylinder according to claim 1, characterized in that, The sub-cylinder (2) is fixedly installed with a No. 2 flange (201) at one end, and a piston (202) is screwed onto the other end of the outer surface of the sub-cylinder (2). The piston (202) is in contact with the inner wall of the mother cylinder (1). A hexagonal hollow nut (203) is fixedly installed on one end of the piston (202).

4. The cylinder body structure of the master-slave hydraulic cylinder according to claim 1, characterized in that, The inner surface of the mounting cover (301) is provided with a second threaded groove (303), and a fastening threaded sleeve (304) is fixedly installed on the outer surface of the quick rod (305). The fastening threaded sleeve (304) is screwed into the second threaded groove (303).

5. The cylinder body structure of the master-slave hydraulic cylinder according to claim 1, characterized in that, The quick rod (305) slides through the mounting cover (301) and the sub-cylinder (2). A sealing ring (306) is movably embedded in the inner surface of the mounting cover (301), and the inner wall of the sealing ring (306) is movably fitted with the quick rod (305).

6. The cylinder body structure of the master-slave hydraulic cylinder according to claim 1, characterized in that, The outer surface of the mounting cover (301) is provided with a No. 3 threaded groove (308), and a bolt (307) is screwed into the No. 3 threaded groove (308).

7. The cylinder body structure of the master-slave hydraulic cylinder according to claim 6, characterized in that, A limiting hole (104) is provided at one end of the outer surface of the mother cylinder (1), and the bolt (307) is inserted into the limiting hole (104) through the No. 3 thread groove (308).

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