A hydraulic cylinder with self-cleaning function and capable of cooling down

Abstract

The present invention discloses a hydraulic oil cylinder with self-cleaning function and capable of cooling down, which specifically relates to the technical field of oil cylinders, including a hydraulic oil cylinder and a cleaning mechanism. When the piston rod of the hydraulic oil cylinder moves, the cleaning mechanism is synchronously driven to move, so that the cleaning mechanism cleans the surface of the cylinder body of the hydraulic oil cylinder; a lump removal mechanism is arranged on the piston rod of the hydraulic oil cylinder, and the lump removal mechanism is used to clean the lump on the surface of the piston rod of the hydraulic oil cylinder. When the piston rod of the hydraulic oil cylinder is extended or retracted, the cleaning mechanism is driven to slide on the cylinder body of the hydraulic oil cylinder. During the sliding process, the sliding sleeve can scrape off the dirt attached to the surface of the cylinder body to avoid poor heat dissipation of the cylinder body. In addition, when the piston rod is extended or retracted, the arc-shaped scraper block can scrape off foreign matter and lumps on the surface of the piston rod to avoid affecting the surface of the piston rod, and also avoid damaging the sealing ring on the hydraulic oil cylinder.

Description

Technical Field

[0001] The present invention relates to the technical field of oil cylinders, and more particularly to a hydraulic oil cylinder with a self-cleaning function and capable of cooling down. Background Art

[0002] The actuators on construction machinery and equipment are generally driven by hydraulic cylinders, such as excavators and other equipment. The hydraulic cylinders on these construction machinery and equipment are usually installed outside and exposed. During construction, the surface of the hydraulic cylinder is easily contaminated with mud and dirt. Especially when dirt adheres to the surface of the piston rod of the hydraulic cylinder, the cooling effect of the piston rod is affected. In addition, the dirt adhered to the surface of the piston rod clumps and hardens. When the piston rod contracts, the dirt clumps will damage the sealing ring on the hydraulic cylinder. In addition, when the hard block adheres to the sealing ring, it will scratch the surface of the piston rod, which will affect the sealing performance of the piston rod. Summary of the invention

[0003] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a hydraulic cylinder with a self-cleaning function and a coolable temperature. The technical problem to be solved by the present invention is that after the hydraulic cylinder on the engineering equipment in the prior art is adhered to dirt, its own cooling performance is affected, and the piston rod surface and the sealing ring are easily affected.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A hydraulic oil cylinder with self-cleaning function and capable of cooling down, comprising a hydraulic oil cylinder, and further comprising:

[0006] A cleaning mechanism installed on the cylinder body of the hydraulic oil cylinder, when the piston rod of the hydraulic oil cylinder moves, the cleaning mechanism is synchronously driven to move, so that the cleaning mechanism cleans the cylinder body surface of the hydraulic oil cylinder;

[0007] A lump removing mechanism is arranged on the piston rod of the hydraulic oil cylinder, and the lump removing mechanism is used to remove the lump on the surface of the piston rod of the hydraulic oil cylinder.

[0008] Furthermore, the cleaning mechanism comprises:

[0009] A sliding sleeve sleeved on the cylinder body of the hydraulic oil cylinder, wherein the sliding sleeve slides freely on the cylinder body of the hydraulic oil cylinder;

[0010] A mounting sleeve coaxially fixed to the sliding sleeve, wherein the mounting sleeve is coaxially provided with an annular mounting groove;

[0011] A cooling water bag is installed in the annular installation groove, wherein a heat-conducting medium is stored in the cooling water bag, and the cooling water bag is in contact with the cylinder body surface of the hydraulic oil cylinder.

[0012] Furthermore, a conical sleeve is commonly connected between the mounting sleeve and the sliding sleeve, the outer diameter of the conical sleeve increases gradually in the direction away from the sliding sleeve, and a plurality of strip slits are arranged in an axial array on the periphery of the mounting sleeve, and the strip slits pass through the annular mounting groove.

[0013] Furthermore, a fixing ring is fixedly sleeved on the piston rod of the hydraulic cylinder, a first ear plate is fixedly connected to the periphery of the fixing ring, a pull rod is vertically fixed to the first ear plate, a second ear plate is fixedly connected to the periphery of the sliding sleeve, and one end of the pull rod away from the first ear plate is fixed to the second ear plate.

[0014] Furthermore, the agglomeration removal mechanism comprises:

[0015] A connecting plate connected to the end of the hydraulic cylinder, wherein the connecting plate is provided with a through hole for the piston rod of the hydraulic cylinder to freely pass through;

[0016] A fixing sleeve fixedly connected to the connecting plate, wherein the inner hole diameter of the fixing sleeve is larger than the outer diameter of the piston rod of the hydraulic cylinder;

[0017] A plurality of arc-shaped scraping blocks are installed in the fixing sleeve in an axial array along the fixing sleeve.

[0018] Furthermore, the agglomeration removing mechanism further comprises a grinding unit, and the grinding unit is used for grinding the inner arc surface of the arc-shaped scraper block.

[0019] Furthermore, the grinding unit comprises:

[0020] A driving structure disposed on the fixed sleeve, the driving structure being used to drive the plurality of arc-shaped scrapers to move in a direction away from the piston rod;

[0021] A grinding sleeve is connected to the fixing ring, and a plurality of grinding parts are fixedly connected to the periphery of one end of the grinding sleeve facing the fixing sleeve.

[0022] Furthermore, the driving structure comprises:

[0023] A driving ring slidably sleeved on the fixing sleeve, wherein a plurality of fixing plates are fixedly connected to one end surface of the driving ring facing the fixing ring;

[0024] A connecting post fixedly connected to the outer curved surface of the arc-shaped scraper block, the connecting post passing through the fixing sleeve and sliding freely;

[0025] A sliding pin is inserted through the end of the connecting column away from the arc-shaped scraper block, and a sliding groove for the sliding pin to be inserted is provided on the fixed plate, and the sliding groove includes an oblique groove and a straight groove in a direction away from the driving ring, and the sliding pin slides freely in the oblique groove and the straight groove;

[0026] A first spring wound around the fixing sleeve, wherein two ends of the first spring in an elastic force direction elastically press against the driving ring and the connecting plate respectively;

[0027] A fixing block is fixedly connected to the first ear plate, and the fixing block is used in conjunction with the fixing plate.

[0028] Furthermore, a rotating cover is rotatably connected to the fixed ring, and the rotating cover is coaxially sleeved on the grinding sleeve. The grinding sleeve rotates freely on the piston rod, and a cleaning ring is sleeved on the grinding sleeve. The cleaning ring slides freely on the grinding sleeve and can freely penetrate into the fixed sleeve. A volute spring is installed in the fixed ring, and the volute spring is sleeved on the grinding sleeve, and the two ends of the volute spring are respectively fixed to the grinding sleeve and the inner wall of the fixed ring, and a ball is rotatably embedded in the periphery of the rotating cover, and a spiral groove for the ball to engage is opened on the inner wall of the fixed sleeve.

[0029] Furthermore, a second spring is wound around the grinding sleeve, and two ends of the second spring in the elastic force direction elastically press against the rotating cover and the cleaning ring respectively.

[0030] Technical effects and advantages of the present invention:

[0031] When the piston rod of the hydraulic cylinder is extended or retracted, the cleaning mechanism is driven to slide on the cylinder body of the hydraulic cylinder. During the sliding process, the sliding sleeve can scrape off the dirt attached to the surface of the cylinder body to avoid poor heat dissipation of the cylinder body. In addition, when the piston rod is extended or retracted, the arc-shaped scraper block can scrape off foreign matter and lumps on the surface of the piston rod to avoid affecting the surface of the piston rod and damaging the sealing ring on the hydraulic cylinder. When the sliding sleeve slides on the cylinder body, the heat-conducting medium in the cooling water bag can absorb the heat on the surface of the cylinder body, thereby assisting in cooling and dissipating the heat of the cylinder body.

[0032] By providing the grinding sleeve, when the piston rod retracts, the grinding part will contact the inner arc surface of the arc scraper block and grind the inner arc surface of the arc scraper block. In addition, the ball rolls in the spiral groove, thereby driving the grinding part to rotate, so that the grinding part performs rotational grinding on the inner arc surface of the arc scraper block, thereby avoiding burrs on the inner arc surface of the arc scraper block, thereby damaging the surface of the piston rod.

[0033] By setting the cleaning ring, when the grinding sleeve rotates, the cleaning ring can clean the surface of the arc scraper block, thereby reducing foreign matter adhering to the surface of the arc scraper block, thereby affecting the cleaning effect of the arc scraper block on the piston rod surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1It is a structural schematic diagram of a hydraulic oil cylinder with self-cleaning function and capable of cooling down in the present invention;

[0035] Figure 2 for Figure 1 Schematic diagram of the upward viewing angle;

[0036] Figure 3 for Figure 1 A schematic cross-sectional view of a part of the structure;

[0037] Figure 4 It is a schematic diagram of the structure after the fixing sleeve, the connecting plate and the fixing ring are assembled in the present invention;

[0038] Figure 5 for Figure 4 A schematic cross-sectional view of some structures;

[0039] Figure 6 It is a schematic diagram of the structure after the fixed ring, the rotating cover and the grinding set are assembled in the present invention;

[0040] Figure 7 for Figure 6 Schematic diagram of the explosion decomposition of the structure in the middle;

[0041] Figure 8 It is a schematic diagram of the structure after the connection plate, the fixing sleeve and the arc-shaped scraper block are assembled in the present invention;

[0042] Fig. 9 for Figure 8 A magnified schematic diagram of the local structure at point A;

[0043] Fig.10 It is a schematic diagram of the structure after the sliding sleeve, the mounting sleeve and the tapered sleeve are assembled in the present invention.

[0044] The accompanying drawings are marked as follows: 1. hydraulic cylinder; 2. mounting sleeve; 3. strip seam; 4. pull rod; 5. sliding sleeve; 6. connecting plate; 7. driving ring; 8. fixing ring; 9. cooling water bag; 10. first spring; 11. second spring; 12. rotating cover; 13. spiral groove; 14. grinding part; 15. grinding sleeve; 16. cleaning ring; 17. scroll spring; 18. fixing sleeve; 19. fixing plate; 20. arc scraper block; 21. connecting column; 22. sliding pin; 23. inclined groove; 24. straight groove; 25. annular mounting groove; 26. fixing block; 27. ball; 28. spiral groove. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] like Figure 1-Figure 10 As shown, the present embodiment discloses: a hydraulic oil cylinder with self-cleaning function and capable of cooling, comprising a hydraulic oil cylinder 1, one end of which is mounted on engineering machinery equipment, a piston rod of the hydraulic oil cylinder 1 is connected to an actuator of the engineering machinery equipment, a sliding sleeve 5 is slidably sleeved on the cylinder body of the hydraulic oil cylinder 1, the sliding sleeve 5 slides freely on the cylinder body of the hydraulic oil cylinder 1, a mounting sleeve 2 is coaxially fixedly connected to the sliding sleeve 5, an annular mounting groove 25 is coaxially provided on the mounting sleeve 2, and an annular cooling water bag 9 is installed in the annular mounting groove 25, a heat-conducting medium such as water, alcohol, etc. is stored in the cooling water bag 9, and the surface of the cooling water bag 9 is in contact with the surface of the cylinder body, so that when the sliding sleeve 5 slides back and forth on the cylinder body of the hydraulic oil cylinder 1, the cooling water bag 9 can absorb the heat on the surface of the cylinder body, and has the effect of dissipating heat and cooling the cylinder body, and when the sliding sleeve 5 slides, the mouth edge of the sliding sleeve 5 can scrape off foreign matter and dirt attached to the cylinder body, so that the heat dissipation of the cylinder body will not be greatly affected;

[0047] A conical sleeve is commonly connected between the mounting sleeve 2 and the sliding sleeve 5, and the outer diameter of the conical sleeve increases in sequence in the direction away from the sliding sleeve 5. A plurality of strip slits 3 are arranged in an array along the axial direction of the periphery of the mounting sleeve 2, and the strip slits 3 penetrate the annular mounting groove 25. By providing the strip slits 3, the mounting sleeve 2 has the deformation ability of elastic expansion and elastic contraction, so that when the pressure of the heat-conducting medium in the cooling water bag 9 is relatively large, the mounting sleeve 2 can be elastically expanded, thereby avoiding the cooling water bag 9 from being greatly deformed;

[0048] In addition, a fixing ring 8 is fixedly sleeved on the piston rod of the hydraulic oil cylinder 1, a first ear plate is fixedly connected to the periphery of the fixing ring 8, a pull rod 4 is vertically fixedly connected to the first ear plate, a second ear plate is fixedly connected to the periphery of the sliding sleeve 5, and one end of the pull rod 4 away from the first ear plate is fixedly connected to the second ear plate, so that when the piston rod of the hydraulic oil cylinder 1 is extended and retracted, the fixing ring 8 will be driven to move, and when the fixing ring 8 moves, the pull rod 4 will be driven to move, so that the pull rod 4 pulls the second ear plate to move, and then the sliding sleeve 5 can be driven to slide on the cylinder body, so as to achieve the purpose of cleaning the surface of the cylinder body with the movement of the piston rod;

[0049] The other end of the hydraulic cylinder 1 is screwed to a connecting plate 6, and a through hole is provided on the connecting plate 6 for the piston rod of the hydraulic cylinder 1 to pass freely. A fixing sleeve 18 is fixedly connected to the connecting plate 6, and the inner hole diameter of the fixing sleeve 18 is larger than the outer diameter of the piston rod of the hydraulic cylinder 1. Four arc-shaped scraper blocks 20 are arranged in the fixing sleeve 18, and the arc-shaped scraper blocks 20 are arranged in an axial array along the fixing sleeve 18, so that the four arc-shaped scraper blocks 20 can be spliced ​​into a ring structure after being pressed against each other. A connecting column 21 is fixedly connected to the outer arc surface of the arc-shaped scraper block 20, and the connecting column 21 passes through the fixing sleeve 18 and slides freely. A driving ring 7 is slidably sleeved on the fixing sleeve 18, and the driving ring 7 is slidably sleeved on the fixing sleeve 18. The ring 7 can slide freely on the fixed sleeve 18. A plurality of fixed plates 19 are fixedly connected to one end face of the driving ring 7 facing the fixed ring 8. A sliding pin 22 is penetrated on the end of the connecting column 21 away from the arc-shaped scraper block 20. A sliding groove for the sliding pin 22 to be inserted is provided on the fixed plate 19. The sliding groove includes an oblique groove 23 and a straight groove 24 in the direction away from the driving ring 7. The sliding pin 22 slides freely in the oblique groove 23 and the straight groove 24. A first spring 10 is wound around the fixed sleeve 18. The two ends of the first spring 10 in the elastic force direction elastically press against the driving ring 7 and the connecting plate 6 respectively. A fixing block 26 is fixedly connected to the first ear plate. The fixing block 26 is used in conjunction with the fixing plate 19.

[0050] During the extension process of the piston rod of the hydraulic cylinder 1, the elastic resisting force generated by the first spring 10 on the driving ring 7 drives the driving ring 7 to move in the extension direction of the piston rod, thereby causing the sliding pin 22 to slide from the straight groove 24 to the inclined groove 23, so that the sliding pin 22 can drive the arc scraper block 20 to move in the direction close to the piston rod until the four arc scraper blocks 20 are spliced ​​into a ring shape, so that the four arc scraper blocks 20 hold the piston rod. In addition, when the piston rod retracts, it simultaneously drives the fixing ring 8 to move in the direction of the cylinder body of the hydraulic cylinder 1. After moving to the fixed position, the end of the fixing block 26 will abut against the fixing plate 19, so that the fixing plate 19 overcomes the elastic resisting force of the first spring 10 and moves in the direction of the cylinder body of the hydraulic cylinder 1, so that the sliding pin 22 slides from the inclined groove 23 to the straight groove 24, and causes the arc scraper block 20 to move in the direction away from the piston rod, thereby causing the arc scraper block 20 to separate and break away from the contact state with the surface of the piston rod;

[0051] A blind hole-shaped mounting groove is coaxially provided on one side of the fixing ring 8 facing the fixing sleeve 18. A grinding sleeve 15 is rotatably sleeved on the piston rod of the hydraulic cylinder 1. The grinding sleeve 15 can rotate freely on the piston rod. In addition, four grinding parts 14 are fixedly connected to the periphery of one end of the grinding sleeve 15 facing the fixing sleeve 18. A volute spring 17 is sleeved around one end of the grinding sleeve 15 located in the mounting groove. The two ends of the volute spring 17 are respectively fixedly connected to the grinding sleeve 15 and the inner wall of the fixing ring 8. A rotating cover 12 is rotatably connected to the fixing ring 8. The rotating cover 12 is coaxially sleeved on the grinding sleeve 15, and the grinding sleeve 15 rotates freely on the piston rod. A cleaning ring 16 is sleeved on the grinding sleeve 15, and the cleaning ring 16 slides freely on the grinding sleeve 15 and can freely penetrate into the fixed sleeve 18. The periphery of the rotating cover 12 is rotatably embedded with a ball 27, and the inner wall of the fixed sleeve 18 is provided with a spiral groove 13 for the ball 27 to engage. The grinding sleeve 15 is sleeved with a second spring 11, and the two ends of the second spring 11 in the elastic force direction elastically press against the rotating cover 12 and the cleaning ring 16 respectively;

[0052] When the piston rod retracts, the second spring 11 elastically resists the cleaning ring 16, so that the end face of the cleaning ring 16 will gradually approach the arc scraper 20. When the piston rod retracts to the fixed position, the ball 27 will be stuck in the spiral groove 13 and make the ball 27 roll in the spiral groove 13. When rolling, the grinding sleeve 15 will be driven to rotate. At the same time, the grinding part 14 on the grinding sleeve 15 is stuck between the arc scraper 20 and the piston rod. At this time, the sliding pin 22 slides from the inclined groove 23 to the straight groove 24, and the radial movement trend of the arc scraper 20 along the piston rod stops. At the same time, the grinding part 14 contacts the inner arc surface of the arc scraper 20. With the rotation of the grinding sleeve 15, the grinding part 14 can rotate and grind the inner arc surface of the arc scraper 20, and the cleaning ring 16 can wipe the end face of the arc scraper 20 facing the fixed ring 8. In addition, in this embodiment, the cleaning ring 16 is configured to be keyed to the grinding sleeve 15.

[0053] The working principle of the present invention is as follows: when the piston rod of the hydraulic cylinder 1 is extended and retracted, it synchronously drives the fixed ring 8 to move, and when the fixed ring 8 moves, it synchronously drives the first ear plate and the pull rod 4 to move, so that the pull rod 4 can drive the second ear plate and the sliding sleeve 5 to move, and when the sliding sleeve 5 slides on the cylinder body of the hydraulic cylinder 1, the edge of the mouth of the sliding sleeve 5 can scrape off foreign matter and dirt attached to the cylinder body, so that the heat dissipation of the cylinder body will not be greatly affected;

[0054] During the extension process of the piston rod of the hydraulic cylinder 1, the elastic resisting force generated by the first spring 10 on the driving ring 7 drives the driving ring 7 to move in the extension direction of the piston rod, thereby causing the sliding pin 22 to slide from the straight groove 24 to the inclined groove 23, so that the sliding pin 22 can drive the arc scraper block 20 to move in the direction close to the piston rod until the four arc scraper blocks 20 are spliced ​​into a ring shape, so that the four arc scraper blocks 20 hold the piston rod. In addition, when the piston rod retracts, it simultaneously drives the fixing ring 8 to move in the direction of the cylinder body of the hydraulic cylinder 1. After moving to the fixed position, the end of the fixing block 26 will abut against the fixing plate 19, so that the fixing plate 19 overcomes the elastic resisting force of the first spring 10 and moves in the direction of the cylinder body of the hydraulic cylinder 1, so that the sliding pin 22 slides from the inclined groove 23 to the straight groove 24, and causes the arc scraper block 20 to move in the direction away from the piston rod, thereby causing the arc scraper block 20 to separate and break away from the contact state with the surface of the piston rod;

[0055] When the piston rod retracts, the second spring 11 elastically resists the cleaning ring 16, so that the end face of the cleaning ring 16 will gradually approach the arc scraper 20. When the piston rod retracts to a fixed position, the ball 27 will be stuck in the spiral groove 13 and make the ball 27 roll in the spiral groove 13. When rolling, the grinding sleeve 15 will be driven to rotate. At the same time, the grinding part 14 on the grinding sleeve 15 is stuck between the arc scraper 20 and the piston rod. At this time, the sliding pin 22 slides from the inclined groove 23 to the straight groove 24, and the radial movement trend of the arc scraper 20 along the piston rod stops. At the same time, the grinding part 14 contacts the inner arc surface of the arc scraper 20. With the rotation of the grinding sleeve 15, the grinding part 14 can rotate and grind the inner arc surface of the arc scraper 20, and the cleaning ring 16 can wipe the end face of the arc scraper 20 facing the fixed ring 8.

[0056] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0057] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0058] Finally: The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic cylinder with self-cleaning function and temperature reduction capability, comprising a hydraulic cylinder (1), characterized in that: Also includes: A cleaning mechanism is installed on the cylinder body of the hydraulic cylinder (1). When the piston rod of the hydraulic cylinder (1) moves, the cleaning mechanism is synchronously driven to move, so that the cleaning mechanism cleans the cylinder body surface of the hydraulic cylinder (1). The cleaning mechanism comprises: A sliding sleeve (5) sleeved on the cylinder body of the hydraulic cylinder (1), wherein the sliding sleeve (5) slides freely on the cylinder body of the hydraulic cylinder (1); A mounting sleeve (2) coaxially fixed to the sliding sleeve (5), wherein an annular mounting groove (25) is coaxially formed on the mounting sleeve (2); A cooling water bag (9) installed in the annular installation groove (25), wherein a heat-conducting medium is stored in the cooling water bag (9), and the cooling water bag (9) is in contact with the cylinder body surface of the hydraulic cylinder (1); A lump removal mechanism is provided on the piston rod of the hydraulic cylinder (1), the lump removal mechanism is used to remove the lump on the surface of the piston rod of the hydraulic cylinder (1), and the lump removal mechanism comprises: A connecting plate (6) connected to the end of the hydraulic cylinder (1), the connecting plate (6) being provided with a through hole for the piston rod of the hydraulic cylinder (1) to freely pass through; A fixing sleeve (18) fixedly connected to the connecting plate (6), wherein the inner hole diameter of the fixing sleeve (18) is larger than the outer diameter of the piston rod of the hydraulic cylinder (1); A plurality of arc-shaped scrapers (20) installed in the fixing sleeve (18) in an array along the axial direction of the fixing sleeve (18); A fixing ring (8) is fixedly sleeved on the piston rod of the hydraulic cylinder (1), a first ear plate is fixedly connected to the periphery of the fixing ring (8), a pull rod (4) is vertically fixedly connected to the first ear plate, a second ear plate is fixedly connected to the periphery of the sliding sleeve (5), and an end of the pull rod (4) away from the first ear plate is fixedly connected to the second ear plate; The agglomeration removal mechanism further comprises a grinding unit, wherein the grinding unit is used to grind the inner arc surface of the arc-shaped scraper block (20), and the grinding unit comprises: a driving structure provided on the fixed sleeve (18), the driving structure being used to drive the plurality of arc-shaped scrapers (20) to move in a direction away from the piston rod; A grinding sleeve (15) connected to the fixing ring (8), wherein a plurality of grinding portions (14) are fixedly connected to a periphery of one end of the grinding sleeve (15) facing the fixing sleeve (18); The driving structure comprises: A driving ring (7) slidably sleeved on the fixing sleeve (18), wherein a plurality of fixing plates (19) are fixedly connected to one end surface of the driving ring (7) facing the fixing ring (8); A connecting post (21) fixedly connected to the outer arc surface of the arc-shaped scraper block (20), wherein the connecting post (21) passes through the fixing sleeve (18) and slides freely; A sliding pin (22) is inserted through the end of the connecting column (21) away from the arc-shaped scraper block (20), and the fixed plate (19) is provided with a sliding groove for the sliding pin (22) to be inserted into, and the sliding groove includes an oblique groove (23) and a straight groove (24) in a direction away from the driving ring (7), and the sliding pin (22) slides freely in the oblique groove (23) and the straight groove (24); A first spring (10) wound around the fixing sleeve (18), wherein two ends of the first spring (10) in the elastic force direction elastically press against the driving ring (7) and the connecting plate (6) respectively; a fixing block (26) fixedly connected to the first ear plate, the fixing block (26) being used in conjunction with the fixing plate (19); A rotating cover (12) is rotatably connected to the fixing ring (8), the rotating cover (12) is coaxially sleeved on the grinding sleeve (15), the grinding sleeve (15) is freely rotatable on the piston rod, a cleaning ring (16) is sleeved on the grinding sleeve (15), the cleaning ring (16) is freely slidable on the grinding sleeve (15) and can freely penetrate into the fixing sleeve (18), a volute spring (17) is installed in the fixing ring (8), the volute spring (17) is sleeved on the grinding sleeve (15), and two ends of the volute spring (17) are respectively fixed to the grinding sleeve (15) and the inner wall of the fixing ring (8), a ball (27) is rotatably embedded on the periphery of the rotating cover (12), and a spiral groove (13) for the ball (27) to engage is provided on the inner wall of the fixing sleeve (18).

2. The temperature-reducing hydraulic cylinder with self-cleaning function according to claim 1, characterized in that: A conical sleeve is commonly connected between the mounting sleeve (2) and the sliding sleeve (5), the outer diameter of the conical sleeve gradually increasing in a direction away from the sliding sleeve (5), a plurality of strip slits (3) are arranged in an array along the axial direction of the periphery of the mounting sleeve (2), and the strip slits (3) penetrate the annular mounting groove (25).

3. The temperature-reducing hydraulic cylinder with self-cleaning function according to claim 1, characterized in that: A second spring (11) is wound around the grinding sleeve (15), and two ends of the second spring (11) in the elastic force direction elastically press against the rotating cover (12) and the cleaning ring (16) respectively.

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