Multi-stage hydraulic oil cylinder with scraping self-lubricating mechanism

Abstract

The utility model discloses a multistage hydraulic oil cylinder with a scraping self-lubricating mechanism, which comprises a hydraulic barrel body, a first shaft body is slidably mounted on the outer surface of the hydraulic barrel body, a second shaft body is slidably mounted on the outer surface of the first shaft body, a first buckle head is fixedly arranged on the outer surface of the hydraulic barrel body, and a second buckle head is fixedly arranged on the outer surface of the second shaft body. The outer surface of the sealing rubber sheet is attached to the outer surface of the first buckle head and the outer surface of the second buckle head. According to the multi-stage hydraulic oil cylinder with the scraping self-lubricating mechanism, when the multi-stage hydraulic oil cylinder is used, the first shaft body and the second shaft body can move, and at the moment, sealing rubber sheets limited and fixed by a first buckle hoop and a second buckle hoop can scrape the outer surfaces of the first shaft body and the second shaft body; dust and impurities on the outer surfaces of the first shaft body and the second shaft body cannot enter a seal in the multi-stage hydraulic oil cylinder, the abrasion and leakage probability of the multi-stage hydraulic oil cylinder in use is reduced, and the service life of the multi-stage hydraulic oil cylinder is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of multi-stage hydraulic cylinder technology, specifically a multi-stage hydraulic cylinder equipped with a scraping self-lubricating mechanism. Background Technology

[0002] A hydraulic cylinder is a device that converts hydraulic energy into mechanical energy. It is an actuator in a hydraulic system. A hydraulic cylinder generally consists of components such as a cylinder barrel, cylinder head, piston, piston rod, and sealing device. Different hydraulic cylinders are selected according to different working requirements. Common hydraulic cylinders include single-acting cylinders, double-acting cylinders, piston cylinders, and multi-stage hydraulic cylinders. Among them, a multi-stage hydraulic cylinder is a hydraulic actuator that realizes multiple actions within a single cylinder. Compared with traditional single-stage cylinders, multi-stage hydraulic cylinders can provide greater stroke and output without increasing the overall cylinder length. However, during the use of a hydraulic cylinder, dust and impurities inevitably adhere to the outer surface of the piston rod. These dust and impurities inevitably enter the sealing device of the cylinder as the piston rod moves, resulting in accelerated wear between the piston rod and the sealing device. Over time, this will cause the hydraulic oil inside the hydraulic cylinder to leak out. Utility Model Content

[0003] The purpose of this invention is to provide a multi-stage hydraulic cylinder with a scraping self-lubricating mechanism to solve the problem mentioned in the background art that dust and impurities will enter the seal between the piston rod and the cylinder body, thus aggravating wear.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage hydraulic cylinder with a scraping self-lubricating mechanism, comprising a hydraulic cylinder body, a first shaft body slidably mounted on the outer surface of the hydraulic cylinder body, the first shaft body and the hydraulic cylinder body being concentrically designed, a second shaft body slidably mounted on the outer surface of the first shaft body, the second shaft body and the first shaft body being concentrically designed, a first buckle head fixedly provided on the outer surface of the hydraulic cylinder body, a second buckle head fixedly provided on the outer surface of one end of the first shaft body, and a lifting lug threadedly mounted on the outer surface of the hydraulic cylinder body.

[0005] Preferably, a scraping mechanism is provided between the first buckle head, the second buckle head and the first shaft body, the second shaft body, the scraping mechanism including: a first buckle, the first buckle being respectively engaged and installed on the outer surfaces of the first buckle head and the second buckle head, and the second buckle head and the outer surfaces of the first buckle head being respectively engaged and installed with second buckles, the inner surfaces of the first buckle and the second buckle are fitted with sealing rubber sheets, and the outer surfaces of the sealing rubber sheets are respectively fitted with the outer surfaces of the first shaft body and the second shaft body, and the outer surfaces of the sealing rubber sheets are respectively fitted with the outer surfaces of the first buckle head and the second buckle head.

[0006] By adopting the above technical solution, the sealing rubber sheet can be restricted to the outer surface of the first and second shafts through the first and second clamps, so that dust and impurities on the outer surface of the first and second shafts will not enter the interior of the hydraulic cylinder after long-term use. The sealing rubber sheet can scrape off the dust and impurities on the outer surface of the first and second shafts, so that the sealing device inside the hydraulic cylinder will not wear faster due to the entry of dust and impurities, thus improving the service life of the multi-stage hydraulic cylinder.

[0007] Preferably, a fastening mechanism is provided between the first and second clamps and the hydraulic cylinder body. When the sealing rubber sheet is damaged by the fastening mechanism, it can be easily replaced without removing the first and second shafts from the hydraulic cylinder body.

[0008] By adopting the above technical solution, the sealing rubber sheet can be easily replaced, ensuring that the sealing rubber sheet remains effective at all times.

[0009] Preferably, the fastening mechanism includes: a first card, the first card being fixedly installed on the outer surface of one end of the first buckle, a second card being fixedly installed on the outer surface of one end of the second buckle, and the second card engaging with the first card; the outer surfaces of one end of the first buckle and the second buckle are respectively penetrated by a bolt group, and the outer surfaces of the second buckle and the first buckle are respectively in contact with the outer surfaces of the first buckle head and the second buckle head.

[0010] By adopting the above technical solution, the first and second buckles can be engaged with each other through the engagement of the first and second cards. The first and second buckles can be fastened together by the bolt group and can be fixed to the outer surfaces of the first and second buckle heads respectively. This facilitates the assembly and fixing of the first and second buckles, as well as their disassembly, and makes it easy to fix and restrict the sealing rubber sheet.

[0011] Preferably, an injection communication mechanism is provided between the second clamp, the first buckle head and the second buckle head, so that oil can be injected into the space between the first shaft body, the second shaft body and the sealing rubber sheet through the injection communication mechanism, so as to facilitate the lubrication of the first shaft body and the second shaft body.

[0012] By adopting the above technical solution, oil can be easily injected into the inner side of the sealing rubber sheet. The sealing rubber sheet can restrict the injected lubricating oil between the first shaft, the second shaft and the first and second snap heads, which facilitates the lubrication of the first shaft and the second shaft.

[0013] Preferably, the injection communication mechanism includes: an oil injection head, which is threadedly installed on the outer surface of the second clamp, and the outer surfaces of the first and second clamps are respectively provided with channels, and the channels are connected to one end of the oil injection head, and the channels are located in the gap of the sealing rubber sheet.

[0014] Using the above technical solution, lubricating oil can be injected through the grease injection head, and the lubricating oil can move through the channel, allowing the oil to pass through and enter the gaps of the sealing rubber sheet.

[0015] Preferably, a sponge ring is provided on the side of the sealing rubber sheet near the hydraulic cylinder, and the sponge ring and the sealing rubber sheet are concentrically designed. The outer surface of the sponge ring is respectively attached to the outer surface of the first shaft and the second shaft, and the sponge ring is attached to one end of the channel.

[0016] By adopting the above technical solution, the injected lubricating oil can be absorbed by the sponge ring, and the sponge ring can evenly distribute the lubricating oil, so that the sponge ring full of lubricating oil can more fully lubricate the first shaft and the second shaft.

[0017] Preferably, the outer surface of the hydraulic cylinder is provided with a marking groove, and the marking groove is aligned with the contact points of the first and second clamps. The outer surface of the second shaft is threaded with a universal ball joint connector, and cylinders are fixedly installed on both outer surfaces of the hydraulic cylinder.

[0018] Using the above technical solution, the positions of the first and second clamps can be positioned by the marking groove, so that after the first and second clamps are combined and fixed, the second clamp can be accurately connected to the channel. The universal ball connector can facilitate the connection of the device with multi-stage hydraulic cylinders, and the cylinder on the outer surface of the hydraulic tank can be used to install multi-stage hydraulic cylinders.

[0019] Compared with the prior art, the beneficial effects of this utility model are: the multi-stage hydraulic cylinder equipped with a scraping self-lubricating mechanism:

[0020] 1. When the multi-stage hydraulic cylinder is in use, the first shaft and the second shaft will move. At this time, the sealing rubber sheet, which is restricted and fixed by the first and second clamps, will scrape the outer surfaces of the first and second shafts, so that dust and impurities on the outer surfaces of the first and second shafts will not enter the seal inside the multi-stage hydraulic cylinder, thereby reducing the probability of wear and leakage during use and extending the service life of the multi-stage hydraulic cylinder.

[0021] 2. By engaging the first and second clips, the first and second clips can be fastened together and fixed. The first and second clips are then connected by a bolt group, allowing them to be securely fixed to the outer surfaces of the first and second clip heads. This enables the sealing rubber sheet to be quickly fixed without disassembling the hydraulic cylinder, the first shaft, and the second shaft, and allows for quick replacement of the sealing rubber sheet if it is damaged.

[0022] 3. During use, lubricating oil can be injected into the gaps of the sealing rubber sheet through the grease fitting. The lubricating oil can be injected through the grease fitting and moved through the channel, allowing it to be sprayed outwards and absorbed by the sponge ring. The lubricated sponge ring can then contact the outer surfaces of the first and second shafts, ensuring that the first and second shafts are evenly lubricated and that the lubricating oil is fully utilized. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the hydraulic barrel body and lifting lugs of this utility model;

[0024] Figure 2 This is a three-dimensional structural diagram of the first and second shafts of this utility model;

[0025] Figure 3 This is a three-dimensional structural diagram of the marking groove and the universal ball connector of this utility model;

[0026] Figure 4 This is a cross-sectional perspective view of the second buckle and sealing rubber sheet of this utility model.

[0027] Figure 5 This is a cross-sectional exploded three-dimensional structural diagram of the second buckle head and sealing rubber sheet of this utility model;

[0028] Figure 6 This utility model Figure 4 Enlarged structural diagram at point A in the middle;

[0029] Figure 7 This utility model Figure 5 Enlarged structural diagram at point B.

[0030] In the diagram: 1. Hydraulic tank body; 2. Lifting lug; 3. First shaft; 4. Second shaft; 5. First buckle head; 6. Second buckle head; 7. Channel; 8. First clamp; 9. Second clamp; 10. First clip; 11. Second clip; 12. Bolt assembly; 13. Oil injection head; 14. Sealing rubber sheet; 15. Marking groove; 16. Universal ball joint connector; 17. Sponge ring. 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] Please see Figure 1-7 This utility model provides a technical solution: a multi-stage hydraulic cylinder with a scraping self-lubricating mechanism, including a hydraulic barrel 1, a first shaft 3 slidably mounted on the outer surface of the hydraulic barrel 1, and the first shaft 3 and the hydraulic barrel 1 are concentrically designed, a second shaft 4 slidably mounted on the outer surface of the first shaft 3, and the second shaft 4 and the first shaft 3 are concentrically designed, a first buckle head 5 is fixedly provided on the outer surface of the hydraulic barrel 1, a second buckle head 6 is fixedly provided on the outer surface of one end of the first shaft 3, and a lifting lug 2 is threadedly installed on the outer surface of the hydraulic barrel 1.

[0033] The hydraulic cylinder 1 can be lifted by the lifting lug 2, which facilitates the movement, adjustment and installation of the multi-stage hydraulic cylinders.

[0034] A scraping mechanism is provided between the first buckle head 5, the second buckle head 6 and the first shaft body 3 and the second shaft body 4. The scraping mechanism includes: a first buckle 8, which is respectively snapped onto the outer surface of the first buckle head 5 and the second buckle head 6, and a second buckle 9 is respectively snapped onto the outer surface of the second buckle head 6 and the first buckle head 5. A sealing rubber sheet 14 is fitted inside the first buckle 8 and the second buckle 9, and the outer surface of the sealing rubber sheet 14 is respectively fitted onto the outer surface of the first shaft body 3 and the second shaft body 4. The outer surface of the sealing rubber sheet 14 is also fitted onto the outer surface of the first buckle head 5 and the second buckle head 6.

[0035] When the multi-stage hydraulic cylinder is in use, dust and impurities will inevitably adhere to the outer surfaces of the first shaft 3 and the second shaft 4. When the first shaft 3 and the second shaft 4 shrink, the dust on the outer surfaces will be scraped off by the sealing rubber sheet 14, so that the dust and impurities cannot be brought into the interior of the multi-stage hydraulic cylinder, thereby reducing the wear between the first shaft 3, the second shaft 4 and the hydraulic cylinder body 1 caused by dust and impurities, and improving the service life of the multi-stage hydraulic cylinder.

[0036] A fastening mechanism is provided between the first clamp 8 and the second clamp 9 and the hydraulic barrel 1. When the sealing rubber sheet 14 is damaged by the fastening mechanism, it can be easily replaced without removing the first shaft 3 and the second shaft 4 from the hydraulic barrel 1.

[0037] The sealing rubber sheet 14 can be fixed and restricted to the outer surfaces of the first snap head 5 and the second snap head 6 by means of the first snap 8 and the second snap 9.

[0038] The fastening mechanism includes: a first card 10, which is fixedly installed on the outer surface of one end of the first buckle 8; a second card 11 is fixedly installed on the outer surface of one end of the second buckle 9, and the second card 11 engages with the first card 10; the outer surfaces of one end of the first buckle 8 and the second buckle 9 are respectively penetrated by bolt group 12, and the outer surfaces of the second buckle 9 and the first buckle 8 respectively fit against the outer surfaces of the first buckle head 5 and the second buckle head 6.

[0039] The first clip 10 and the second clip 11 can be engaged with each other to connect the first clip 8 and the second clip 9. The bolt group 12 can connect the other end of the first clip 8 and the second clip 9, so that the first clip 8 and the second clip 9 can be fixed by the bolt group 12. The first clip 8 and the second clip 9 can be fixed to the outer surface of the first clip head 5 and the second clip head 6, so that the sealing rubber sheet 14 can be quickly installed and fixed, and can be easily replaced after the sealing rubber sheet 14 is worn.

[0040] An injection communication mechanism is provided between the second clamp 9, the first snap head 5, and the second snap head 6. The injection communication mechanism allows oil to be injected between the first shaft 3, the second shaft 4, and the sealing rubber sheet 14, facilitating lubrication of the first shaft 3 and the second shaft 4. The injection communication mechanism includes an oil injection head 13, which is threaded onto the outer surface of the second clamp 9. The outer surfaces of the first snap head 5 and the second snap head 6 are respectively provided with channels 7, and the channels 7 are connected to one end of the oil injection head 13. The channels 7 are located in the gap of the sealing rubber sheet 14.

[0041] When in use, lubricating oil can be injected through the grease injection head 13, so that the lubricating oil can enter the inner side of the sealing rubber sheet 14 through the channel 7, and the lubricating oil can be stored between the first snap head 5, the second snap head 6 and the sealing rubber sheet 14, so that the lubricating oil can lubricate as the first shaft 3 and the second shaft 4 move.

[0042] A sponge ring 17 is provided on the side of the sealing rubber sheet 14 near the hydraulic barrel 1, and the sponge ring 17 and the sealing rubber sheet 14 are concentrically designed. The outer surface of the sponge ring 17 is in contact with the outer surface of the first shaft 3 and the second shaft 4 respectively, and the sponge ring 17 is in contact with one end of the channel 7.

[0043] After the lubricating oil is injected into the inner side of the sealing rubber sheet 14, the lubricating oil will soak the sponge ring 17, so that the sponge ring 17 can evenly lubricate the outer surfaces of the first shaft 3 and the second shaft 4 after being soaked in lubricating oil. The lubricating oil can be fully absorbed by the sponge ring 17, maximizing the utilization of the lubricating oil and fully lubricating the outer surfaces of the first shaft 3 and the second shaft 4.

[0044] The outer surface of the hydraulic barrel 1 is provided with a marking groove 15, and the marking groove 15 is aligned with the contact points of the first clamp 8 and the second clamp 9. The outer surface of the second shaft 4 is threaded with a universal ball connector 16, and cylinders are fixedly installed on both outer surfaces of the hydraulic barrel 1.

[0045] The marking groove 15 allows the first clamp 8 and the second clamp 9 to be aligned with the marking groove 15 during installation, ensuring accurate docking between the channel 7 and the oil injection head 13. The cylinders on both sides of the hydraulic tank 1 can accommodate the installation of multi-stage hydraulic cylinders, while the universal ball joint 16 can reduce swaying when connecting and using multi-stage hydraulic cylinders, thus reducing the probability of deformation when the first shaft 3 and the second shaft 4 move.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage hydraulic cylinder equipped with a scraping self-lubricating mechanism, comprising a hydraulic cylinder (1), wherein a first shaft (3) is slidably mounted on the outer surface of the hydraulic cylinder (1), and the first shaft (3) and the hydraulic cylinder (1) are concentrically designed; a second shaft (4) is slidably mounted on the outer surface of the first shaft (3), and the second shaft (4) and the first shaft (3) are concentrically designed; a first buckle head (5) is fixedly provided on the outer surface of the hydraulic cylinder (1); a second buckle head (6) is fixedly provided on the outer surface of one end of the first shaft (3); and a lifting lug (2) is threadedly installed on the outer surface of the hydraulic cylinder (1), characterized in that: A scraping mechanism is provided between the first buckle head (5), the second buckle head (6) and the first shaft body (3) and the second shaft body (4). The scraping mechanism includes: a first buckle (8), which is respectively snapped onto the outer surface of the first buckle head (5) and the second buckle head (6), and a second buckle (9) is respectively snapped onto the outer surface of the second buckle head (6) and the first buckle head (5). A sealing rubber sheet (14) is fitted inside the first buckle (8) and the second buckle (9), and the outer surface of the sealing rubber sheet (14) is respectively fitted onto the outer surface of the first shaft body (3) and the second shaft body (4). The outer surface of the sealing rubber sheet (14) is respectively fitted onto the outer surface of the first buckle head (5) and the second buckle head (6).

2. A multi-stage hydraulic cylinder with a scraping self-lubricating mechanism according to claim 1, characterized in that: The first clamp (8) and the second clamp (9) are provided with a fastening mechanism between them and the hydraulic barrel (1). When the sealing rubber sheet (14) is damaged by the fastening mechanism, it is not necessary to remove the first shaft (3) and the second shaft (4) from the hydraulic barrel (1) for easy replacement.

3. A multi-stage hydraulic cylinder with a scraping self-lubricating mechanism according to claim 2, characterized in that: The fastening mechanism includes: a first card (10), which is fixedly installed on the outer surface of one end of the first buckle (8), and a second card (11) is fixedly installed on the outer surface of one end of the second buckle (9), and the second card (11) engages with the first card (10). The outer surfaces of one end of the first buckle (8) and the second buckle (9) are respectively penetrated by a bolt group (12), and the outer surfaces of the second buckle (9) and the first buckle (8) are respectively attached to the outer surfaces of the first buckle head (5) and the second buckle head (6).

4. A multi-stage hydraulic cylinder with a scraping self-lubricating mechanism according to claim 1, characterized in that: An injection communication mechanism is provided between the second buckle (9), the first buckle head (5) and the second buckle head (6). Through the injection communication mechanism, oil can be injected between the first shaft (3), the second shaft (4) and the sealing rubber sheet (14) to facilitate lubrication of the first shaft (3) and the second shaft (4).

5. A multi-stage hydraulic cylinder with a scraping self-lubricating mechanism according to claim 4, characterized in that: The injection communication mechanism includes an oil injection head (13), which is threadedly installed on the outer surface of the second clamp (9). The outer surfaces of the first snap head (5) and the second snap head (6) are respectively provided with channels (7), and the channels (7) are connected to one end of the oil injection head (13). The channels (7) are located in the gap of the sealing rubber sheet (14).

6. A multi-stage hydraulic cylinder with a scraping self-lubricating mechanism according to claim 1, characterized in that: A sponge ring (17) is provided on the side of the sealing rubber sheet (14) near the hydraulic barrel (1), and the sponge ring (17) and the sealing rubber sheet (14) are concentrically designed. The outer surface of the sponge ring (17) is in contact with the outer surface of the first shaft (3) and the second shaft (4) respectively, and the sponge ring (17) is in contact with one end of the channel (7).

7. A multi-stage hydraulic cylinder with a scraping self-lubricating mechanism according to claim 1, characterized in that: The outer surface of the hydraulic barrel (1) is provided with a marking groove (15), and the marking groove (15) is aligned with the contact points of the first buckle (8) and the second buckle (9). The outer surface of the second shaft (4) is threaded with a universal ball connector (16), and cylinders are fixedly installed on both outer surfaces of the hydraulic barrel (1).

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