Oil cylinder

Abstract

The utility model discloses an oil cylinder and relates to the technical field of oil cylinders, the oil cylinder comprises an oil cylinder, a mounting block and a supporting rod, the mounting block is fixedly connected to the top of the oil cylinder, the oil cylinder is provided with a sealing structure, when a sealing ring needs to be replaced, a sealing cover is firstly taken out from the outer side of the mounting block, and a fixing bolt is rotated; when the lower end of the fixing bolt is separated from the threaded hole in the mounting hole, a spring can drive a connecting sliding rod to slide upwards, so that the connecting sliding rod drives a connecting block to slide upwards, and meanwhile, the connecting block can drive a guide sleeve to slide upwards; and upwards sliding the guide sleeve until the guide sleeve is separated from the piston rod, taking out the sealing ring from the outer side of the piston rod, and replacing the sealing ring.

Description

Technical Field

[0001] The utility model relates to the technical field of oil cylinders, in particular to an oil cylinder. Background Art

[0002] Large vertical cylinder is a hydraulic device used to produce linear motion. It is widely used in industry, construction, heavy machinery and equipment. Through the pressure of hydraulic oil, the piston moves in the cylinder body, driving the piston rod to achieve external mechanical connection and force transmission.

[0003] For example, a cylinder seal assembly with publication number CN220378606U includes a sealing assembly, a descaling assembly snap-fittedly arranged on the outer peripheral side of the sealing assembly, and a snap-fit ​​assembly rotatably arranged on the sealing assembly; the snap-fit ​​assembly is snap-fitted with the descaling assembly; the cylinder seal assembly solves the problem that the existing sealing ring can scrape off impurities on the piston rod while sealing, but if the impurities on the piston rod are scraped off by the sealing ring for a long time, the seal ring at the output end of the cylinder will wear faster, and then the seal ring at the output end of the cylinder will need to be replaced frequently, which is a very time-consuming and labor-intensive technical problem. The oil cylinder seal assembly can scrape off impurities such as dust and iron filings adhering to the outer wall of the piston rod, avoid scraping the sealing ring at the output end of the cylinder, reduce the wear of the sealing ring, extend the service life of the sealing ring, and reduce the frequency of replacing the sealing ring.

[0004] A cylinder sealing assembly in the above technical solution seals the cylinder and descales the piston rod by means of the clamping cooperation between the clamping assembly and the descaling assembly. During actual operation, the piston rod of the cylinder will periodically apply pressure to the sealing ring during movement, which may easily cause damage to the sealing ring. Therefore, the sealing ring needs to be replaced in time. Utility Model Content

[0005] The utility model aims to provide an oil cylinder to solve the problem that the piston rod of the oil cylinder in the above-mentioned background technology will periodically apply pressure to the sealing ring during movement, which may easily cause damage to the sealing ring, so the sealing ring needs to be replaced in time.

[0006] To achieve the above object, the utility model provides the following technical solution: an oil cylinder, comprising an oil cylinder, a mounting block, and a support rod, wherein the mounting block is fixedly connected to the top of the oil cylinder, and four support rods are fixedly connected between the four corners of the top of the oil cylinder and the bottom of the mounting block;

[0007] A piston rod is provided at the upper end of the oil cylinder, and the piston rod passes through the middle of the mounting block, and a sealing structure for sealing the piston rod is provided at the top of the mounting block and located on the outside of the piston rod, the sealing structure is provided with a guide sleeve, and four annularly distributed connecting blocks are fixedly connected to the outside of the guide sleeve, and a connecting slide rod is fixedly connected to the bottom of the connecting block, a threaded hole is provided inside the connecting block, and the threaded hole extends into the inside of the connecting slide rod until it passes through the inside of the connecting slide rod, and fixing bolts are threadedly connected inside the threaded holes inside the connecting block and the connecting slide rod.

[0008] Preferably, the inner side of the guide sleeve is slidably connected to the piston rod, and a damping ring with an annular structure is arranged on the outer side of the lower end of the connecting slide rod.

[0009] Preferably, a plurality of equidistant and annularly distributed fixing threaded holes are provided on the top of the mounting block, and fixing screws are threadedly connected inside the fixing threaded holes. A sealing cover is fixedly connected to the top of the oil cylinder, and the sealing cover is connected to the top of the oil cylinder via fixing screws.

[0010] Preferably, a mounting groove is provided in the middle of the top of the mounting block, and the mounting groove is distributed on the outside of the piston rod in an annular structure, a sealing ring is provided inside the mounting groove, and the top of the sealing ring fits with the bottom of the guide sleeve.

[0011] Preferably, an opening is provided on the top of the sealing cover, and a dustproof ring is fixedly connected inside the opening, and the inside of the dustproof ring is slidably connected to the piston rod, and a dust removal ring is fixedly connected to the top of the dustproof ring.

[0012] Preferably, four annular mounting holes are provided on the top of the mounting block, and the four mounting holes are slidably connected to four connecting slide bars, and the lower end of the connecting slide bar is a damping ring that fits the inner side of the mounting hole.

[0013] Preferably, a threaded hole is provided at the bottom of the mounting hole, and a fixing bolt passes through the threaded connection between the connecting block and the inside of the connecting slide rod and the bottom of the mounting hole, and a spring is fixedly connected between the inside of the mounting hole and the bottom of the connecting slide rod.

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

[0015] The oil cylinder is provided with a sealing structure. When the sealing ring needs to be replaced, the sealing cover is first taken out from the outside of the mounting block, and the fixing bolt is rotated to separate the fixing bolt from the threaded hole inside the mounting hole. When the lower end of the fixing bolt is separated from the threaded hole inside the mounting hole, the spring will drive the connecting slide rod to slide upward, so that the connecting slide rod drives the connecting block to slide upward, and at the same time, the connecting block will drive the guide sleeve to slide upward until the guide sleeve and the top of the sealing ring are separated from each other, and the guide sleeve is slid upward until the guide sleeve and the piston rod are separated from each other. At this time, the sealing ring is taken out from the outside of the piston rod and the sealing ring is replaced.

[0016] Furthermore, a dust ring is provided. During the up and down movement of the piston rod, the piston rod will move up and down inside the dust ring. The cross-section of the dust ring is set to a wedge-shaped structure. During the up and down movement of the piston rod, it slides on the inside of the dust ring at the same time, so that the dust ring can scrape off the dirt on the outside of the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the sealing cover of the utility model;

[0019] Figure 3 This is a schematic diagram of the explosion structure of the sealing cover of the utility model;

[0020] Figure 4 This is a schematic diagram of the explosion structure of the connection block of the utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the dustproof ring of the utility model;

[0022] Figure 6 This is a schematic diagram of the cross-sectional structure of the installation block of the utility model.

[0023] In the figure: 1. Cylinder; 2. Mounting block; 3. Support rod; 4. Fixing threaded hole; 5. Fixing screw; 6. Sealing cover; 7. Mounting hole; 8. Mounting groove; 9. Guide sleeve; 10. Connecting block; 11. Connecting slide rod; 12. Fixing bolt; 13. Sealing ring; 14. Dust ring; 15. Dust removal ring; 16. Spring; 17. Piston rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0025] In a further preferred embodiment of the present invention, Figure 1 - Figure 6As shown, an oil cylinder comprises an oil cylinder 1, a mounting block 2, and a support rod 3. The mounting block 2 is fixedly connected to the top of the oil cylinder 1, and four support rods 3 are fixedly connected between the four corners of the top of the oil cylinder 1 and the bottom of the mounting block 2; a piston rod 17 is arranged at the upper end of the oil cylinder 1, and the piston rod 17 passes through the middle of the mounting block 2, and a sealing structure for sealing the piston rod 17 is arranged at the top of the mounting block 2 and located outside the piston rod 17, the sealing structure is provided with a guide sleeve 9, and four annularly distributed connecting blocks 10 are fixedly connected to the outside of the guide sleeve 9, and a connecting slide rod 11 is fixedly connected to the bottom of the connecting block 10, a threaded hole is arranged inside the connecting block 10, and the threaded hole extends into the inside of the connecting slide rod 11 until it passes through the inside of the connecting slide rod 11, and the threaded holes inside the connecting block 10 and the connecting slide rod 11 are threadedly connected with fixing bolts 12; the inner side of the guide sleeve 9 is slidably connected to the piston rod 17, and the connecting slide rod 11 is arranged as a stepped column structure which is narrow at the top and wide at the bottom; a plurality of equidistant and annularly distributed fixing threaded holes 4 are arranged on the top of the mounting block 2, and the fixing bolts 12 are fixed to the bottom of the connecting block 10 ... A fixing screw 5 is connected to the inner thread of the groove hole 4, and a sealing cover 6 is fixedly connected to the top of the oil cylinder 1, and the sealing cover 6 is connected to the top of the oil cylinder 1 through the fixing screw 5; a mounting groove 8 is provided in the middle of the top of the mounting block 2, and the mounting groove 8 is distributed on the outside of the piston rod 17 in an annular structure, and a sealing ring 13 is provided inside the mounting groove 8, and the top of the sealing ring 13 fits with the bottom of the guide sleeve 9; an opening is provided on the top of the sealing cover 6, and a dust ring 14 is fixedly connected inside the opening, and the inside of the dust ring 14 slides with the piston rod 17 Dynamic connection, a dust ring 15 is fixedly connected to the top of the dust ring 14; four annular mounting holes 7 are arranged on the top of the mounting block 2, and the four mounting holes 7 are slidably connected to the four connecting slide bars 11, and the wider part of the lower end of the connecting slide bar 11 is engaged with the inside of the mounting hole 7; a threaded hole is arranged at the bottom of the mounting hole 7, and a fixing bolt 12 passes through the threaded connection between the connecting block 10 and the connecting slide bar 11 and the bottom of the mounting hole 7, and a spring 16 is fixedly connected between the inside of the mounting hole 7 and the bottom of the connecting slide bar 11.

[0026] The guide sleeve 9 applies pressure to the sealing ring 13, so that the sealing ring 13 is pressed between the bottom of the guide sleeve 9 and the mounting groove 8, thereby fixing the sealing ring 13 inside the mounting groove 8. Since the mounting groove 8 is located on the outside of the piston rod 17, the connection between the piston rod 17 and the mounting block 2 is sealed by squeezing the guide sleeve 9 and the sealing ring 13. When the sealing ring 13 needs to be replaced, first take out the sealing cover 6 from the outside of the mounting block 2, rotate the fixing bolt 12, so that the fixing bolt 12 is separated from the threaded hole inside the mounting hole 7. When the lower end of the fixing bolt 12 is separated from the threaded hole inside the mounting hole 7, the spring 16 will drive the connecting slide rod 11 to slide upward, so that the connecting slide rod 11 drives the connecting block 10 to slide upward, and at the same time, the connecting block 10 will drive the guide sleeve 9 to slide upward until the guide sleeve 9 and the top of the sealing ring 13 are separated from each other, slide the guide sleeve 9 upward until the guide sleeve 9 and the piston rod 17 are separated from each other, then take out the sealing ring 13 from the outside of the piston rod 17 and replace the sealing ring 13.

[0027] During the up and down movement of the piston rod 17, the piston rod 17 will move up and down inside the dust ring 14. The cross-section of the dust ring 15 is set to a wedge-shaped structure. During the up and down movement of the piston rod 17, it slides on the inside of the dust ring 15 at the same time, so that the dust ring 15 can scrape off the dirt on the outside of the piston rod 17.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oil cylinder, comprising an oil cylinder (1), a mounting block (2), and a support rod (3), wherein the mounting block (2) is fixedly connected to the top of the oil cylinder (1), and four support rods (3) are fixedly connected between the four corners of the top of the oil cylinder (1) and the bottom of the mounting block (2); Features: The upper end of the oil cylinder (1) is provided with a piston rod (17), and the piston rod (17) passes through the middle of the mounting block (2), and a sealing structure for sealing the piston rod (17) is provided at the top of the mounting block (2) and located outside the piston rod (17), the sealing structure is provided with a guide sleeve (9), and four annularly distributed connecting blocks (10) are fixedly connected to the outside of the guide sleeve (9), and a connecting slide rod (11) is fixedly connected to the bottom of the connecting block (10), a threaded hole is provided inside the connecting block (10), and the threaded hole extends into the inside of the connecting slide rod (11) until it passes through the inside of the connecting slide rod (11), and the threaded holes inside the connecting block (10) and the connecting slide rod (11) are threadedly connected to fixing bolts (12).

2. The oil cylinder according to claim 1, characterized in that: The inner side of the guide sleeve (9) is slidably connected to the piston rod (17), and the connecting slide rod (11) is configured as a stepped column structure that is narrow at the top and wide at the bottom.

3. The oil cylinder according to claim 1, characterized in that: The top of the mounting block (2) is provided with a plurality of equidistant and annularly distributed fixing threaded holes (4), and fixing screws (5) are internally threadedly connected to the fixing threaded holes (4). The top of the oil cylinder (1) is fixedly connected with a sealing cover (6), and the sealing cover (6) is connected to the top of the oil cylinder (1) via the fixing screws (5).

4. The oil cylinder according to claim 1, characterized in that: A mounting groove (8) is provided in the middle of the top of the mounting block (2), and the mounting groove (8) is distributed on the outside of the piston rod (17) in an annular structure. A sealing ring (13) is provided inside the mounting groove (8), and the top of the sealing ring (13) fits with the bottom of the guide sleeve (9).

5. The oil cylinder according to claim 3, characterized in that: The sealing cover (6) is provided with an opening at the top, and a dustproof ring (14) is fixedly connected inside the opening, and the inside of the dustproof ring (14) is slidably connected to the piston rod (17), and a dust removal ring (15) is fixedly connected to the top of the dustproof ring (14).

6. The oil cylinder according to claim 1, characterized in that: The top of the mounting block (2) is provided with four mounting holes (7) with annular interiors, and the interiors of the four mounting holes (7) are slidably connected to four connecting slide bars (11), and the wider portion of the lower end of the connecting slide bar (11) is engaged with the interior of the mounting holes (7).

7. The oil cylinder according to claim 6, characterized in that: A threaded hole is provided at the bottom of the mounting hole (7), and a fixing bolt (12) passes through the connection block (10) and the threaded connection between the inside of the connecting slide rod (11) and the bottom of the mounting hole (7), and a spring (16) is fixedly connected between the inside of the mounting hole (7) and the bottom of the connecting slide rod (11).

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