Improved hydraulic oil cylinder

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, and discloses an improved hydraulic oil cylinder which comprises a dust removal ring rotationally sleeved on the outer wall of a piston rod and rotationally connected with the top of an upper cylinder cover, and a plurality of dust scraping pieces, one end of each dust scraping piece is fixedly connected with the bottom of the dust removal ring, and the bottoms of the dust scraping pieces are attached to the top of the upper cylinder cover. According to the dust removal device, after the driving block rotates along with the driving disc, the driving block pushes the transmission column to move, so that the dust removal ring rotates along the central axis of the dust removal ring, and dust and hydraulic oil accumulated on the top of the upper cylinder cover can be scraped through the dust scraping sheet; dust attached to the upper cylinder cover and hydraulic oil are prevented from being attached to the outer wall of the piston rod, entering the cylinder barrel, being mixed with the hydraulic oil and being accumulated to form large-particle impurities, the situation that the hydraulic oil is blocked during transmission is avoided, and the adverse effect on normal work of the hydraulic cylinder is reduced.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to an improved hydraulic cylinder. Background Technology

[0002] A hydraulic cylinder is an actuator that converts hydraulic energy into mechanical energy to achieve linear reciprocating motion or oscillating motion. It has a simple structure, reliable operation, and is widely used in the hydraulic systems of various machines.

[0003] A hydraulic cylinder consists of a cylinder barrel, cylinder head, piston, piston rod, sealing device, and buffer device. The cylinder head is composed of an upper cylinder head and a lower cylinder head. The top of the piston rod passes through the upper cylinder head and extends to the top of the upper cylinder head. Since the piston rod is directly exposed to the external environment, a dust scraper ring is installed inside the upper cylinder head to clean the external dust of the piston rod, preventing the piston rod from moving into the cylinder barrel and causing excessive impurities in the hydraulic oil, which could lead to blockage during hydraulic oil transmission.

[0004] Currently, when the piston rod moves out of the cylinder, a small amount of hydraulic oil adheres to its outer wall. When the piston rod moves into the cylinder, some of the hydraulic oil remaining on the outer wall is scraped off by the dust scraper ring along with the dust. The scraped-off dust mixes with the hydraulic oil and remains on the top of the upper cylinder head. At the same time, because hydraulic oil has a certain viscosity, dust around the upper cylinder head is easily adsorbed onto the outside of the hydraulic oil. Over time, this leads to a large accumulation of dust on the upper cylinder head. As the dust is soaked in the hydraulic oil for a long time, it becomes soft and re-adheres to the outer wall of the piston rod. It then enters the cylinder with the piston rod and mixes with the hydraulic oil inside the cylinder. Over time, this accumulates inside the hydraulic oil, forming larger particles of impurities. This causes blockages in the hydraulic oil transmission, thus adversely affecting the normal operation of the hydraulic cylinder. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides an improved hydraulic cylinder, which aims to solve the problems in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an improved hydraulic cylinder, comprising:

[0007] Hydraulic cylinder body.

[0008] The dust removal ring is rotatably sleeved on the outer wall of the piston rod and rotatably connected to the top of the upper cylinder head.

[0009] Multiple dust scrapers are fixedly connected at one end to the bottom of the dust removal ring, and the bottom of the multiple dust scrapers fits against the top of the upper cylinder head.

[0010] The drive column is fixedly connected at one end to the top of the dust removal ring.

[0011] The transmission roller is rotatably mounted on the top of the upper cylinder head. The outer wall of the transmission roller and the outer wall of the piston rod are in contact with each other. A drive disc is fixedly mounted on one end of the transmission roller. A drive block for moving the transmission column is fixedly mounted on the edge of the drive disc away from the transmission roller. The two sides of the drive block are inclined towards the drive disc.

[0012] As a further description of the above technical solution:

[0013] The outer wall of the dust removal ring has multiple arc-shaped grooves distributed in a ring shape. A support block is rotatably installed in the inner cavity of the arc-shaped groove. The end of the support block near the opening of the arc-shaped groove is fixedly connected to the top of the upper cylinder head.

[0014] As a further description of the above technical solution:

[0015] A top pressure spring is fixedly installed on one side of the support block, and the other end of the top pressure spring is fixedly connected to the inner wall of the arc-shaped groove.

[0016] As a further description of the above technical solution:

[0017] The dust scraper blades are angled away from the upper cylinder head, and the bottom of the dust scraper blades is designed with a conical structure.

[0018] As a further description of the above technical solution:

[0019] Both ends of the transmission roller are fixedly mounted with rotating shafts. One end of the drive disc is fixedly connected to the end of one of the rotating shafts away from the transmission roller. The outer walls of the two rotating shafts are rotatably fitted with brackets, and the other end of the brackets is fixedly connected to the top of the upper cylinder head.

[0020] As a further description of the above technical solution:

[0021] A rubber ring is fixedly fitted to the outer wall of the transmission roller. The outer wall of the rubber ring has anti-slip grooves distributed in a ring, and the outer wall of the rubber ring and the outer wall of the piston rod fit together.

[0022] This utility model has the following beneficial effects:

[0023] In this invention, when the drive block rotates together with the drive disc, the drive block pushes the transmission column to move, thereby causing the dust removal ring to rotate along its own central axis. This allows the dust scraper to remove the dust and hydraulic oil accumulated on the top of the upper cylinder head, preventing the dust and hydraulic oil adhering to the upper cylinder head from adhering to the outer wall of the piston rod and entering the cylinder to mix with the hydraulic oil and accumulate to form larger particles of impurities. This avoids blockage during hydraulic oil transmission and reduces the adverse effects on the normal operation of the hydraulic cylinder. Attached Figure Description

[0024] Figure 1This is a perspective view of the present utility model;

[0025] Figure 2 This is an assembly drawing of the dust removal ring and dust scraper of this utility model;

[0026] Figure 3 This utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0027] Figure 4 This utility model Figure 1 Enlarged view of the structure at point B;

[0028] Figure 5 This is an assembly drawing of the drive block and transmission column of this utility model.

[0029] Legend:

[0030] 1. Hydraulic cylinder body; 2. Bracket; 3. Dust removal ring; 4. Rotating shaft; 5. Dust scraper; 6. Support block; 7. Top pressure spring; 8. Rubber ring; 9. Transmission roller; 10. Drive disc; 11. Drive block; 12. Transmission column. Detailed Implementation

[0031] 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.

[0032] Reference Figure 1-5 One embodiment of this utility model provides: an improved hydraulic cylinder, comprising:

[0033] The hydraulic cylinder body 1 consists of a cylinder barrel, cylinder head, piston, piston rod, sealing device, and buffer device. When hydraulic oil enters from the oil inlet and acts on one end of the piston, it pushes the piston to move in the axial direction, thereby driving the components connected to the piston rod to move. When hydraulic oil enters from the oil inlet at the other end, the piston will move in the opposite direction. In this way, the hydraulic cylinder can achieve linear reciprocating motion, which is existing technology and will not be elaborated on here.

[0034] The dust removal ring 3 is rotatably sleeved on the outer wall of the piston rod and rotatably connected to the top of the upper cylinder head. The inner diameter of the dust removal ring 3 is larger than the diameter of the piston rod. The top of the piston rod passes through the dust removal ring 3 and extends to the top of the dust removal ring 3, so as to avoid the inner wall of the dust removal ring 3 from sticking to the outer wall of the piston rod, which would cause wear and damage to the piston rod.

[0035] Multiple dust scraper blades 5 are fixedly connected at one end to the bottom of the dust removal ring 3, and the bottom of the multiple dust scraper blades 5 is in contact with the top of the upper cylinder head. When the dust removal ring 3 is rotated, the multiple dust scraper blades 5 rotate accordingly, thereby scraping away the dust and hydraulic oil accumulated on the top of the upper cylinder head, and allowing the scraped dust and hydraulic oil to adhere to the outer wall of the dust scraper blades 5.

[0036] The dust scraper 5 is made of rubber material, which can improve the plastic deformation ability of the dust scraper 5 and reduce the strength of the dust scraper 5, preventing excessive wear of the upper cylinder head caused by the dust scraper 5 as it rotates with the dust removal ring 3, thus protecting the upper cylinder head.

[0037] One end of the drive column 12 is fixedly connected to the top of the dust removal ring 3, and pushing the drive column 12 can make the dust removal ring 3 rotate.

[0038] The transmission roller 9 is rotatably mounted on the top of the upper cylinder head. The outer wall of the transmission roller 9 and the outer wall of the piston rod are in contact with each other, and a drive disc 10 is fixedly mounted on one end of the transmission roller 9. When the piston rod moves upward, the transmission roller 9 rotates along the tangential direction of the piston rod movement. At this time, the drive disc 10 rotates together with the transmission roller 9. When the piston rod moves downward, the drive disc 10 rotates in the opposite direction with the transmission roller 9.

[0039] A drive block 11 for moving the transmission column 12 is fixedly installed at the edge of the drive disc 10 away from the transmission roller 9. The two sides of the drive block 11 are inclined towards the drive disc 10. When the drive disc 10 rotates repeatedly, the drive block 11 rotates with the drive disc 10 until the inclined side wall of the drive block 11 and the outer wall of the transmission column 12 are in contact. As the drive block 11 rotates continuously, the transmission column 12 slides along the inclined side wall of the drive block 11 and pushes the transmission column 12 to move away from the drive disc 10, so that the dust removal ring 3 rotates along its own central axis. The dust scraper 5 can then scrape off the dust and hydraulic oil accumulated on the top of the cylinder head, preventing the dust and hydraulic oil attached to the cylinder head from adhering to the outer wall of the piston rod and entering the cylinder to mix with the hydraulic oil and accumulate to form large particles of impurities. This avoids blockage during hydraulic oil transmission and reduces the adverse effects on the normal operation of the hydraulic cylinder.

[0040] The top of the upper cylinder head is equipped with multiple drive rollers 9 arranged in a ring, and the top of the dust removal ring 3 is equipped with multiple drive columns 12 arranged in a ring. The multiple drive columns 12 and multiple drive rollers 9 are staggered. When the piston rod moves up and down, the multiple drive rollers 9 rotate simultaneously, thereby driving the multiple drive columns 12 simultaneously through multiple drive blocks 11, which improves the smoothness of the rotation of the dust removal ring 3.

[0041] The outer wall of the dust removal ring 3 has multiple arc-shaped grooves distributed in a ring. A support block 6 is rotatably installed in the inner cavity of the arc-shaped groove. One end of the support block 6 near the opening of the arc-shaped groove is fixedly connected to the top of the upper cylinder head. When the dust removal ring 3 rotates, it rotates relative to the arc-shaped groove and the support block 6. At the same time, the support block 6 supports the dust removal ring 3 from different positions, increasing the stress points of the dust removal ring 3 and preventing the dust removal ring 3 from shifting or shaking when rotating, thus improving the stability of the dust removal ring 3 rotation.

[0042] A top pressure spring 7 is fixedly installed on one side of the support block 6. The other end of the top pressure spring 7 is fixedly connected to the inner wall of the arc groove. When the inclined side wall of the drive block 11 is in contact with the outer wall of the transmission column 12 and the dust removal ring 3 rotates, the top pressure spring 7 is compressed by the pressure of the inner wall of the arc groove. When the inclined side wall of the drive block 11 is separated from the outer wall of the transmission column 12, the external force on the top pressure spring 7 disappears, allowing the top pressure spring 7 to extend and the dust removal ring 3 to rotate in the opposite direction until it is reset. This is beneficial for the inclined side wall of the drive block 11 to push the transmission column 12 to move for a second time, which is beneficial for realizing the repeated rotation of the dust removal ring 3.

[0043] The dust scraper blade 5 is tilted away from the upper cylinder head. When the dust scraper blade 5 scrapes away the dust and hydraulic oil attached to the top of the upper cylinder head, a large amount of dust and lubricating oil will adhere to the outer wall of the dust scraper blade 5. As the dust removal ring 3 rotates continuously, the dust and hydraulic oil accumulated on the side wall of the dust scraper blade 5 gradually increase. As a result, the dust and hydraulic oil at the bottom push the dust and hydraulic oil at the top of the dust scraper blade 5 to move. At this time, the hydraulic oil and dust at the top move along the outer wall of the dust scraper blade 5, so that the dust on the outer wall of the dust scraper blade 5 is continuously separated from the outer wall of the dust scraper blade 5 and transferred to the area directly below the dust removal ring 3. This prevents a large amount of dust and hydraulic oil from accumulating on the outer wall of the dust scraper blade 5 and at the bottom of the dust removal ring 3, which would have an adverse effect on the normal cleaning of dust and hydraulic oil.

[0044] The bottom of the dust scraper 5 is designed with a conical structure, which can effectively reduce the contact area between the bottom of the dust scraper 5 and the top of the upper cylinder head, effectively reduce the friction between the dust scraper 5 and the upper cylinder head when the dust removal ring 3 rotates, and improve the smoothness of the repeated rotation of the dust removal ring 3.

[0045] Both ends of the transmission roller 9 are fixedly mounted with rotating shafts 4. One end of the drive disk 10 is fixedly connected to one of the rotating shafts 4 away from the transmission roller 9. When the transmission roller 9 rotates, the two rotating shafts 4 rotate accordingly, and at this time, the drive disk 10 rotates together.

[0046] The outer walls of the two rotating shafts 4 are rotatably fitted with brackets 2. The other end of the brackets 2 is fixedly connected to the top of the upper cylinder head. The brackets 2 can support the rotating shafts 4, allowing the transmission rollers 9 and the drive disc 10 to rotate around the central axis of the two rotating shafts 4, and limiting the rotation trajectory of the transmission rollers 9 and the drive disc 10.

[0047] A rubber ring 8 is fixedly sleeved on the outer wall of the transmission roller 9. When the outer wall of the rubber ring 8 and the outer wall of the piston rod are in contact, the rubber ring 8 is deformed under force, thereby increasing the contact area between the outer wall of the rubber ring 8 and the outer wall of the piston rod and improving the friction between the rubber ring 8 and the outer wall of the piston rod.

[0048] The outer wall of the rubber ring 8 has anti-slip grooves distributed in a ring, and the outer wall of the rubber ring 8 and the outer wall of the piston rod fit together to prevent slippage between the outer wall of the rubber ring 8 and the outer wall of the piston rod, which is conducive to the continuous rotation of the transmission roller 9.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An improved hydraulic cylinder, characterized in that: include Hydraulic cylinder body (1); Dust removal ring (3) is rotatably sleeved on the outer wall of the piston rod and rotatably connected to the top of the upper cylinder head; Multiple dust scrapers (5) are fixedly connected at one end to the bottom of the dust removal ring (3), and the bottom of the multiple dust scrapers (5) is in contact with the top of the upper cylinder head; One end of the transmission column (12) is fixedly connected to the top of the dust removal ring (3); A transmission roller (9) is rotatably mounted on the top of the upper cylinder head. The outer wall of the transmission roller (9) and the outer wall of the piston rod are in contact with each other. A drive disk (10) is fixedly mounted on one end of the transmission roller (9). A drive block (11) for moving the transmission column (12) is fixedly mounted on the edge of the drive disk (10) away from the transmission roller (9). The two sides of the drive block (11) are inclined in the direction close to the drive disk (10).

2. An improved hydraulic cylinder according to claim 1, characterized in that: The outer wall of the dust removal ring (3) is provided with multiple arc-shaped grooves in a ring shape. A support block (6) is rotatably installed in the inner cavity of the arc-shaped groove. The end of the support block (6) near the opening of the arc-shaped groove is fixedly connected to the top of the upper cylinder head.

3. An improved hydraulic cylinder according to claim 2, characterized in that: A top pressure spring (7) is fixedly installed on one side of the support block (6), and the other end of the top pressure spring (7) is fixedly connected to the inner wall of the arc groove.

4. An improved hydraulic cylinder according to claim 1, characterized in that: The dust scraper (5) is inclined away from the upper cylinder head, and the bottom of the dust scraper (5) is set as a conical structure.

5. An improved hydraulic cylinder according to claim 1, characterized in that: Both ends of the transmission roller (9) are fixedly installed with rotating shafts (4). One end of the drive disc (10) and one end of one of the rotating shafts (4) away from the transmission roller (9) are fixedly connected. The outer walls of the two rotating shafts (4) are rotatably sleeved with brackets (2). The other end of the brackets (2) is fixedly connected to the top of the upper cylinder head.

6. An improved hydraulic cylinder according to claim 1, characterized in that: The outer wall of the transmission roller (9) is fixedly fitted with a rubber ring (8). The outer wall of the rubber ring (8) is provided with anti-slip grooves in a ring shape, and the outer wall of the rubber ring (8) and the outer wall of the piston rod are in close contact with each other.

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