Height adjusting oil cylinder with piston rod and coal dust scraping function

Abstract

The utility model discloses a height adjusting oil cylinder with a piston rod coal dust scraping function, which relates to the technical field of hydraulic oil cylinders and comprises a cylinder barrel, a guide sleeve is fixedly mounted at the top end of the cylinder barrel, the piston rod is slidably sleeved in the guide sleeve along the vertical direction, and the top end of the piston rod upwards extends out of the guide sleeve. The lower end of the piston rod extends into the cylinder barrel and is sleeved with a piston; an inner concave cavity is formed in the upper portion of the guide sleeve, a dustproof ring matched with the piston rod is arranged in the inner concave cavity, and the piston rod above the guide sleeve is movably sleeved with a dust removal assembly. According to the height adjusting oil cylinder with the piston rod and the coal dust scraping function, the dustproof ring and the dust removal assembly are arranged in a matched mode, so that coal dust can be scraped, the service life of the dustproof ring is prolonged, in addition, when the dustproof effect of the dust removal assembly is reduced, the dust removal assembly can be reused only by unscrewing a screw barrel and replacing a cotton strip, the disassembly and assembly difficulty and time are saved, and the working efficiency is improved. And economic loss caused by shutdown and production halt is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinders, in particular to a height-adjusting oil cylinder with a piston rod coal dust scraping function. Background Art

[0002] During the use of the oil cylinder, the extended piston rod will inevitably be contaminated with foreign debris. The tiny particles of these debris will adhere to the surface of the piston rod and enter the cylinder when the piston rod retreats into the cylinder body, contaminating the hydraulic oil. At the same time, these debris particles will also cause wear on the surface of the piston rod. Therefore, a scraper ring is provided at the front end cover of the oil cylinder to scrape off the debris on the surface of the piston rod.

[0003] In the Chinese utility model patent application number: CN202120992535.7, there is disclosed a cylinder piston rod assembled scraping structure, which includes a front cylinder cover outer end surface arranged on the cylinder, the piston rod of the cylinder and the front cylinder cover slidingly cooperate, the front end of the front cylinder cover has an inner concave cavity, the inner concave cavity is provided with a guide ring slidingly cooperated with the piston rod, and a lip seal ring is provided between the inner side of the guide ring and the piston rod. The cylinder piston rod assembled scraping structure uses a scraping ring to scrape off the debris particles attached to the surface of the piston rod, thereby preventing the debris from entering the cylinder and causing wear on the piston rod. However, the scraping ring can only scrape off the granular debris, and the powdery debris on the piston rod can only be scraped off by the dust ring, which is easy to damage the dust ring, thereby reducing the service life of the entire cylinder; in addition, when the dust ring is damaged, it is necessary to dismantle the cylinder and the cylinder guide sleeve, piston and other components to replace it accordingly, which is not only labor-consuming and time-consuming, but also causes the whole equipment to be shut down for a long time, affecting the production progress.

[0004] Therefore, it is necessary to propose a height-adjusting oil cylinder with a piston rod coal dust scraping function to solve the above problems. Utility Model Content

[0005] Technical problem to be solved: The purpose of the utility model is to provide a height-adjustable oil cylinder with a piston rod coal dust scraping function, so as to solve the problem that the existing oil cylinder piston rod assembled scraping structure proposed in the above background technology can only scrape granular debris, and the powdery debris on the piston rod can only be scraped off by the dust ring, which can easily damage the dust ring and reduce the service life of the entire oil cylinder; in addition, in order to replace the damaged dust ring, it is necessary to dismantle the oil cylinder and the cylinder guide sleeve, piston and other components for the corresponding replacement, which is not only labor-intensive and time-consuming, but also causes a long shutdown of the entire equipment, affecting the production progress.

[0006] Technical solution: To achieve the above purpose, the utility model is implemented through the following technical solution: a height-adjusting oil cylinder with a piston rod coal dust scraping function, comprising a cylinder barrel, a guide sleeve is fixedly installed on the top of the cylinder barrel, a piston rod is vertically slidably sleeved in the guide sleeve, the top of the piston rod extends upward out of the guide sleeve, the lower end of the piston rod extends into the cylinder barrel and is sleeved with a piston; an inner concave cavity is opened on the upper part of the guide sleeve, a dust ring adapted to the piston rod is arranged in the inner concave cavity, and a movable sleeve is sleeved on the piston rod above the guide sleeve There is a dust removal component; the dust removal component includes a threaded tube, a screw barrel and a dust scraper ring which are arranged in sequence from bottom to top along the vertical direction, the threaded tube and the screw barrel are threadedly connected, the dust scraper ring is a conical ring with a small upper end and a large lower end, and the lower end of the dust scraper ring is fixedly connected to the screw barrel; the bottom of the threaded tube is fixedly connected to the guide sleeve, and a clamping group is fixedly installed on the top of the threaded tube, the clamping group includes a plurality of arc-shaped clamping plates evenly distributed along the circumference of the threaded tube, an annular cavity is left between the clamping group and the piston rod, and a cotton strip is spirally wound on the piston rod in the cavity.

[0007] Preferably, the scraper ring is fixedly connected to the barrel by welding, and the inner wall of the upper end of the scraper ring is close to the piston rod but does not contact the piston rod.

[0008] Preferably, the threaded tube is fixedly connected to the guide sleeve by welding, and the inner wall of the threaded tube is close to the piston rod but does not contact the piston rod.

[0009] Preferably, a connecting ring is sleeved on the bottom of the threaded tube, a plurality of bolt holes are evenly opened on the connecting ring along the circumference, bolts are matched and installed in the bolt holes, and the connecting ring is fixedly connected to the guide sleeve by the bolts.

[0010] The utility model discloses a kind of oil cylinder with the function of scraping coal dust of piston rod, and the oil cylinder with the function of scraping coal dust of piston rod has unique structure and is easy to use. When the oil cylinder is working, more coal dust will be absorbed on the piston rod. When the piston rod contracts, the conical scraper ring can scrape off the large particles of coal dust. In addition, when the screw barrel is threadedly connected with the threaded pipe, the clamping plate produces elastic deformation under the action of the inner wall of the scraper ring, and bends inward at the same time, squeezing the cotton strip in the annular cavity, so that the cotton strip and the piston rod are tightly together, thereby scraping off the powdered coal dust on the piston rod. Through the coordinated arrangement of the dustproof ring and the dust removal assembly, the coal dust can be scraped off, and the service life of the dustproof ring is improved. In addition, when the dustproof effect of the dust removal assembly is reduced, it is only necessary to unscrew the screw barrel and replace the cotton strip to reuse it. It not only saves the difficulty and time of disassembly and assembly, but also avoids the economic losses caused by shutdown. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a front view schematic diagram of the structure of the utility model;

[0012] Figure 2 It is a cross-sectional schematic diagram of the structure of the utility model;

[0013] Figure 3 For this utility model Figure 2 A magnified schematic diagram of the structure of area A in the middle.

[0014] In the figure: 1. Cylinder; 2. Piston rod; 3. Piston; 4. Guide sleeve; 5. Dust ring; 6. Connecting ring; 7. Threaded tube; 8. Clamping plate; 9. Cotton strip; 10. Screw barrel; 11. Dust scraper ring. DETAILED DESCRIPTION

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Embodiment 1: Embodiment 1 provides a height-adjustable oil cylinder with a piston rod coal dust scraping function, which is directly improved on the existing oil cylinder piston rod assembled scraping structure, and has a unique structure. Please refer to Figure 1-3 As shown, it includes a cylinder 1, a guide sleeve 4 is fixedly installed on the top of the cylinder 1, a piston rod 2 is vertically slidably sleeved in the guide sleeve 4, the top of the piston rod 2 extends upward from the guide sleeve 4, the lower end of the piston rod 2 extends into the cylinder 1 and is sleeved with a piston 3; an inner concave cavity is opened on the upper part of the guide sleeve 4, a dust ring 5 adapted to the piston rod 2 is arranged in the inner concave cavity, and a dust removal component is movably sleeved on the piston rod 2 above the guide sleeve 4.

[0017] The dust removal assembly includes a threaded tube 7, a screw barrel 10 and a scraper ring 11 which are arranged in sequence from bottom to top along the vertical direction. The threaded tube 7 and the screw barrel 10 are threadedly connected. The scraper ring 11 is a conical ring with a small upper end and a large lower end, and the lower end of the scraper ring 11 is fixedly connected to the screw barrel 10. There are various ways to fix the scraper ring 11 and the screw barrel 10, for example: the scraper ring 11 is fixedly connected to the screw barrel 10 by welding, and the inner wall of the upper end of the scraper ring 11 is close to the piston rod 2 but does not contact the piston rod 2; the bottom of the threaded tube 7 is fixedly connected to the guide sleeve 4, and a clamping group is fixedly installed on the top of the threaded tube 7. The clamping group includes a plurality of arc-shaped clamping plates 8 evenly distributed along the circumference of the threaded tube 7, and an annular cavity is left between the clamping group and the piston rod 2, and a cotton strip 9 is spirally wound on the piston rod 2 in the cavity.

[0018] During operation, the screw barrel 10 is threadedly connected to the threaded tube 7, and the clamping plate 8 produces elastic deformation under the action of the inner wall of the scraper ring 11, and bends inward at the same time, squeezing the cotton strips 9 in the annular cavity, so that the cotton strips 9 are tightly attached to the piston rod 2; there are many ways to fix the threaded tube 7 and the guide sleeve 4, for example: the threaded tube 7 and the guide sleeve 4 are fixedly connected by welding, the inner wall of the threaded tube 7 is close to the piston rod 2 but does not contact the piston rod 2, and there are many ways to fix the threaded tube 7 and the clamping group, for example: a connecting tube is welded on the top of the threaded tube 7, the outer diameter of the connecting tube is smaller than the inner diameter of the threaded tube 7, and the inner diameter of the connecting tube is larger than the inner diameter of the threaded tube 7, and a plurality of vertical grooves are evenly opened on the top of the connecting tube along the circumference, and the plurality of grooves evenly divide the upper part of the connecting tube into a plurality of arc plates.

[0019] When we use the cylinder, since more coal dust will be absorbed by the piston rod 2 when the cylinder is working, the conical scraper ring 11 can scrape off large particles of coal dust when the piston rod 2 contracts. In addition, when the screw barrel 10 is threadedly connected to the threaded tube 7, the clamping plate 8 produces elastic deformation under the action of the inner wall of the scraper ring 11, and bends inward at the same time, squeezing the cotton strip 9 in the annular cavity, so that the cotton strip 9 and the piston rod 2 are tightly together, thereby scraping off the powdered coal dust on the piston rod 2.

[0020] Embodiment 2: Embodiment 2 is different from Embodiment 1 in that Figure 2-3 As shown, a connecting ring 6 is mounted on the bottom of the threaded tube 7, and a plurality of bolt holes are evenly arranged along the circumference of the connecting ring 6. Bolts are matched and installed in the bolt holes. The connecting ring 6 is fixedly connected to the guide sleeve 4 by bolts. By using bolt connection, the threaded tube 7 is easily replaced.

[0021] 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 height-adjusting oil cylinder with a piston rod having a coal dust scraping function, comprising a cylinder barrel (1), characterized in that: A guide sleeve (4) is fixedly mounted on the top of the cylinder (1), a piston rod (2) is slidably mounted in the guide sleeve (4) in a vertical direction, the top of the piston rod (2) extends upward out of the guide sleeve (4), the lower end of the piston rod (2) extends into the cylinder (1) and is mounted with a piston (3); an inner concave cavity is formed at the top of the guide sleeve (4), a dust ring (5) adapted to the piston rod (2) is arranged in the inner concave cavity, and a dust removal assembly is movably mounted on the piston rod (2) above the guide sleeve (4); the dust removal assembly comprises a threaded tube (7), a threaded tube (8) and a dust removal assembly (9) which are arranged in sequence from bottom to top in the vertical direction; The screw barrel (10) and the scraper ring (11) are threadedly connected. The scraper ring (11) is a conical ring with a small upper end and a large lower end, and the lower end of the scraper ring (11) is fixedly connected to the screw barrel (10). The bottom of the threaded tube (7) is fixedly connected to the guide sleeve (4), and a clamping group is fixedly installed on the top of the threaded tube (7). The clamping group includes a plurality of arc-shaped clamping plates (8) evenly distributed along the circumference of the threaded tube (7). An annular cavity is left between the clamping group and the piston rod (2), and a cotton strip (9) is spirally wound on the piston rod (2) in the cavity.

2. The oil cylinder with a piston rod coal dust scraping function according to claim 1, characterized in that: The scraper ring (11) is fixedly connected to the screw barrel (10) by welding, and the inner wall of the upper end of the scraper ring (11) is close to the piston rod (2) but does not contact the piston rod (2).

3. The oil cylinder with a piston rod coal dust scraping function according to claim 1, characterized in that: The threaded tube (7) and the guide sleeve (4) are fixedly connected by welding, and the inner wall of the threaded tube (7) is close to the piston rod (2) but does not contact the piston rod (2).

4. The oil cylinder with a piston rod coal dust scraping function according to claim 1, characterized in that: The bottom of the threaded tube (7) is sleeved with a connecting ring (6), a plurality of bolt holes are evenly arranged along the circumference of the connecting ring (6), bolts are matched and installed in the bolt holes, and the connecting ring (6) is fixedly connected to the guide sleeve (4) by the bolts.

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