Self-locking hydraulic oil cylinder

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, in particular to a self-locking hydraulic oil cylinder. According to the technical scheme, the hydraulic cylinder comprises a hydraulic cylinder body and a piston rod arranged at one end of the hydraulic cylinder body, and a scraping ring is further arranged at one end of the hydraulic cylinder body. According to the self-locking hydraulic oil cylinder, the scraping ring, the sliding block, the cleaning wiping sleeve, the transmission mechanism and other structures are matched, when the self-locking hydraulic oil cylinder is used, the motor drives the gear to drive the gear sleeve and the cleaning wiping sleeve to rotate, and the scraping ring scrapes impurities on the surface when the piston rod reciprocates. The abutting block pushes the sliding block to be opened through the inclined abutting face, and the inclined scraping face of the abutting block scrapes away sundries and particles left on the scraping ring. Through combination of rotary cleaning and mechanical scraping, particles retained on the scraping ring are actively removed and are prevented from serving as grinding materials to abrade the piston rod, the problem that local abrasion of the piston rod of the oil cylinder is aggravated due to particle retention is solved, the cleaning effect of the oil cylinder is improved, and the service life of the oil cylinder is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a self-locking hydraulic cylinder. Background Technology

[0002] Hydraulic cylinders are core actuators in hydraulic systems, primarily used to convert hydraulic energy (liquid pressure energy) into mechanical energy, enabling linear reciprocating motion or oscillation. They are widely used in engineering machinery, machine tools, automobiles, metallurgy, and shipbuilding. Self-locking hydraulic cylinders are special types of hydraulic cylinders with an automatic piston rod locking function. They can remain stationary at any stroke position without additional mechanical locking devices, preventing displacement caused by load weight, hydraulic system leakage, or external interference. Currently, self-locking hydraulic cylinders often feature a scraper ring installed on the outer end face of the front cylinder head. During piston rod reciprocating motion, this scraper ring removes surface debris particles, preventing contamination, reducing wear, and extending piston rod life. In existing technologies, when debris particles remain on the scraper ring, they are squeezed between the scraper ring's cutting edge and the piston rod surface. During piston rod reciprocating motion, the particles act like "abrasives," continuously scraping the piston rod surface during relative sliding. This causes localized contact stress concentration and grinding / cutting effects, gradually wearing away the piston rod surface material, forming scratches, pits, or even grooves, ultimately exacerbating localized wear. Utility Model Content

[0003] The purpose of this invention is to address the problem in the prior art where impurities trapped in the scraper ring are squeezed between the cutting edge and the piston rod, and act as abrasive scrapers on the surface during reciprocating motion, leading to increased local wear and scratches. This invention proposes a self-locking hydraulic cylinder.

[0004] The technical solution of this utility model is as follows: A self-locking hydraulic cylinder includes a hydraulic cylinder body and a piston rod disposed at one end of the hydraulic cylinder body. The hydraulic cylinder body is also provided with a scraper ring at one end. The cylinder also includes: a plurality of sliders arranged in a circumferential array on the piston rod; abutting blocks fixedly connected to the outer wall of the piston rod and abutting the sliders in an opening and closing motion; a cleaning mechanism disposed at one end of the hydraulic cylinder body near the piston rod; and a transmission mechanism installed at one end of the hydraulic cylinder body to drive the cleaning mechanism.

[0005] Optionally, the cleaning mechanism includes multiple support blocks fixedly connected to the outer wall of the piston rod in a circumferential array. Each support block has a fixedly connected insert rod at its bottom end. Each slider has a fixedly connected protrusion on its upper middle surface. Each insert rod has a slidably fitted insert block that fits into the protrusion at its bottom end. Each protrusion has a first spring inside it. One end of the first spring is fixedly connected to the inner wall of the protrusion, and the other end of the first spring is fixedly connected to the insert block.

[0006] Optionally, the insert block is provided with a second spring inside, one end of the second spring is fixedly connected to the insert rod, and the other end of the second spring is fixedly connected to the inside of the insert block.

[0007] Optionally, the transmission mechanism includes a support frame fixedly connected to one end of the hydraulic cylinder body, a motor fixedly connected to the support frame, a gear fixedly connected to the output shaft of the motor, the end of the gear away from the motor being rotatably connected to the end of the hydraulic cylinder body, and a support sleeve fixedly connected to one end of the hydraulic cylinder body, and a gear sleeve rotatably connected to the support sleeve and meshing with the gear.

[0008] Optionally, a cleaning wiper is provided inside the gear sleeve.

[0009] Optionally, the abutment block is provided with an inclined abutment surface, and the slider is provided with an inclined scraping surface.

[0010] Optionally, the cleaning sleeve is made of polyvinyl alcohol sponge.

[0011] In summary, this application includes at least one of the following beneficial technical effects:

[0012] This invention utilizes the cooperation of a scraper ring, slider, cleaning sleeve, and transmission mechanism. When using a self-locking hydraulic cylinder, the motor drives the gear to rotate the gear sleeve and cleaning sleeve. As the piston rod reciprocates, the scraper ring removes surface debris. The abutment pushes the slider open via its inclined surface, and its inclined scraping surface removes debris particles retained on the scraper ring. This method combines rotational cleaning with mechanical scraping to actively remove retained particles from the scraper ring, preventing them from acting as abrasives and wearing down the piston rod. This solves the problem of accelerated localized wear on the piston rod caused by particle retention, improving the cleaning effect and service life of the hydraulic cylinder. Attached Figure Description

[0013] Figure 1 A structural schematic diagram of a self-locking hydraulic cylinder according to this utility model is provided;

[0014] Figure 2 for Figure 1 Partial structural diagram;

[0015] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure;

[0016] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0017] Reference numerals in the attached drawings: 1. Hydraulic cylinder body; 11. Piston rod; 12. Scraper ring; 13. Support sleeve; 14. Gear sleeve; 15. Cleaning wipe sleeve; 16. Support frame; 17. Motor; 18. Gear; 2. Abutment block; 21. Inclined abutment surface; 3. Slider block; 31. Inclined scraping surface; 32. Protrusion; 33. Insertion block; 34. First spring; 35. Second spring; 4. Support block; 41. Insertion rod. Detailed Implementation

[0018] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0019] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0020] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example

[0025] like Figures 1 to 4 As shown, this utility model proposes a self-locking hydraulic cylinder, including a hydraulic cylinder body 1 and a piston rod 11 disposed at one end of the hydraulic cylinder body 1. A scraper ring 12 is also provided at one end of the hydraulic cylinder body 1. The scraper ring 12 is installed at one end of the hydraulic cylinder body 1 and scrapes away debris particles from its surface during the reciprocating motion of the piston rod, preventing contaminants from entering the cylinder. Multiple sliders 3 are arranged in a circumferential array on the piston rod 11. When opened, the sliders 3 scrape away debris particles retained on the scraper ring 12 through an inclined scraping surface 31, preventing particle retention and wear on the piston rod. Multiple abutment blocks 2 are fixedly connected to the outer wall of the piston rod 11, which abut against the sliders 3 to move in an opening motion. The abutment blocks 2 are fixed to the outer wall of the piston rod 11, and through the cooperation of the inclined abutment surface 21 and the inclined scraping surface 31 of the sliders 3, push the sliders 3 to move in an opening motion. The abutment block 2 is provided with an inclined abutment surface 21. The inclined abutment surface 21 is used as the inclined surface of the abutment block 2. When it comes into contact with the slider 3, it generates a horizontal component force, forcing the slider 3 to open outward to expand the cleaning range. The slider 3 is provided with an inclined scraping surface 31. The inclined scraping surface 31 is the inclined working surface of the slider 3. When it comes into contact with the scraping ring 12, it forms an effective scraping angle, improving the efficiency of debris removal.

[0026] Among them, such as Figures 1 to 3As shown, a cleaning mechanism is provided near the piston rod 11 at one end of the hydraulic cylinder body 1. The cleaning mechanism includes multiple support blocks 4 arranged in a circumferential array and fixedly connected to the outer wall of the piston rod 11. Each support block 4 has a fixedly connected insertion rod 41 at its bottom end. The insertion rod 41 is fixed to the bottom end of the support block 4 and inserted into the insertion block 33. Through sliding cooperation with the protrusion 32 and the insertion block 33, it guides the opening and resetting movement of the slider 3. Each slider 3 has a fixedly connected protrusion 32 on its upper middle surface. Each insertion rod 41 has a slidably fitted insertion block 33 that engages with the protrusion 32 at its bottom end. The insertion block 33 is slidably fitted onto the bottom end of the insertion rod 41 and engages with the protrusion 32. It is connected to the insertion rod 41 by a second spring 35 to buffer the impact of movement and maintain the position of the slider 3. A first spring 34 is provided inside the protrusion 32. The first spring 34 is installed inside the protrusion 32, with one end connected to the inner wall of the protrusion and the other end connected to the insertion block 33, providing elastic force to ensure the slider 3 tightly adheres to the scraper ring 12. One end of the first spring 34 is fixedly connected to the inner wall of the protrusion 32, and the other end of the first spring 34 is fixedly connected to the insert block 33.

[0027] In addition, such as Figure 3 As shown, a second spring 35 is provided inside the insert block 33. The second spring 35 is located inside the insert block 33, with one end connected to the insert rod 41 and the other end connected to the inner wall of the insert block 33, enhancing the connection stability between the slider 3 and the insert rod 41 and adapting to the reciprocating motion of the piston rod. One end of the second spring 35 is fixedly connected to the insert rod 41, and the other end of the second spring 35 is fixedly connected to the inside of the insert block 33.

[0028] It is worth noting that, such as Figures 2 to 4 As shown, a transmission mechanism for driving the cleaning mechanism is installed at one end of the hydraulic cylinder body 1. The transmission mechanism includes a support frame 16 fixedly connected to one end of the hydraulic cylinder body 1, a motor 17 fixedly connected to the support frame 16, and a gear 18 fixedly connected to the output shaft of the motor 17. The end of the gear 18 away from the motor 17 is rotatably connected to the end of the hydraulic cylinder body 1. A support sleeve 13 is also fixedly connected to one end of the hydraulic cylinder body 1. The support sleeve 13 is fixed to the end of the hydraulic cylinder body 1, supports the gear sleeve 14, and provides a pivot point for rotation, ensuring stable operation of the transmission mechanism. A gear sleeve 14 is rotatably connected to the support sleeve 13 and meshes with the gear 18. The gear sleeve 14 and the gear 18 mesh and rotate under the drive of the transmission mechanism, driving the cleaning wipe sleeve 15 to rotate synchronously to clean the piston. The cleaning wipe sleeve 15 is movably attached inside the gear sleeve 14. The cleaning wipe sleeve 15 is made of polyvinyl alcohol sponge and fits against the surface of the piston rod. By rotating, it adsorbs the debris particles scraped by the scraper ring 12, enhancing the cleaning effect. Furthermore, its outer wall is equipped with double-sided adhesive, allowing it to be attached to the inner wall of the gear sleeve 14, and can be removed for cleaning or replacement after a long period of time. The cleaning sleeve 15 is made of polyvinyl alcohol sponge.

[0029] In this embodiment, when using a self-locking hydraulic cylinder, starting the motor 17 causes its output shaft to drive the gear 18 to rotate. Since the gear 18 meshes with the gear sleeve 14, the gear sleeve 14 rotates, thereby driving the cleaning wiping sleeve 15 to rotate. Simultaneously, the piston rod 11 reciprocates during operation, and the scraping ring 12 scrapes away debris particles from the surface of the piston rod 11. Meanwhile, the inclined abutment surface 21 of the abutment block 2 abuts against the slider 3, and then the support block 4 also drives the insertion rod 41 to simultaneously insert into the insertion block 33. Until the inclined abutment surface 21 forcefully abuts against the slider 3, multiple sliding blocks 3 will open, allowing the inclined scraping surface 31 of the slider 3 to scrape away dust and dirt from the scraping ring 12. Through the cooperation of these components, piston rod wear caused by debris particle retention can be effectively reduced, improving cleaning efficiency and cylinder lifespan.

[0030] The preferred embodiments of this utility model described above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A self-locking hydraulic cylinder, comprising a hydraulic cylinder body (1) and a piston rod (11) disposed at one end of the hydraulic cylinder body (1), wherein a scraper ring (12) is further provided at one end of the hydraulic cylinder body (1), characterized in that, Also includes: Multiple sliders (3) are arranged in a circular array on the piston rod (11); Abutting block (2) is fixedly connected to the outer wall of the piston rod (11) and abutting slider (3) moves in an opening motion. A cleaning mechanism is located at one end of the hydraulic cylinder body (1) near the piston rod (11); The cleaning mechanism includes multiple support blocks (4) fixedly connected to the outer wall of the piston rod (11) in a circular array. Each support block (4) has a fixed rod (41) at its bottom end. Each slider (3) has a fixed protrusion (32) on its upper middle surface. Each rod (41) has a sliding insert (33) that fits into the protrusion (32) at its bottom end. Each protrusion (32) has a first spring (34) inside it. One end of the first spring (34) is fixedly connected to the inner wall of the protrusion (32), and the other end of the first spring (34) is fixedly connected to the insert (33). A transmission mechanism installed at one end of the hydraulic cylinder body (1) to drive the cleaning mechanism; The transmission mechanism includes a support frame (16) fixedly connected to one end of the hydraulic cylinder body (1), a motor (17) fixedly connected to the support frame (16), a gear (18) fixedly connected to the output shaft of the motor (17), the end of the gear (18) away from the motor (17) being rotatably connected to the end of the hydraulic cylinder body (1), and a support sleeve (13) fixedly connected to one end of the hydraulic cylinder body (1), a gear sleeve (14) rotatably connected to the support sleeve (13) and meshing with the gear (18).

2. A self-locking hydraulic cylinder according to claim 1, characterized in that, The insert (33) is provided with a second spring (35) inside. One end of the second spring (35) is fixedly connected to the insert rod (41), and the other end of the second spring (35) is fixedly connected to the inside of the insert (33).

3. The self-locking hydraulic cylinder according to claim 1, wherein The gear sleeve (14) is movably fitted with a cleaning wipe sleeve (15).

4. The self-locking hydraulic cylinder according to claim 1, wherein The abutment block (2) is provided with an inclined abutment surface (21), and the slider (3) is provided with an inclined scraping surface (31).

5. A self-locking hydraulic cylinder according to claim 3, characterized in that The cleaning sleeve (15) is made of polyvinyl alcohol sponge.

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