Wear-resistant hydraulic oil cylinder

Abstract

The utility model relates to an abrasion-resistant hydraulic oil cylinder which is provided with a cylinder barrel, a piston rod arranged in the cylinder barrel in a sliding mode and a piston fixedly arranged on the piston rod and arranged in the cylinder barrel in a sliding mode. A wear-resisting assembly is detachably arranged at an opening of the cylinder barrel and comprises a wear-resisting ring detachably arranged at the opening of the cylinder barrel and slidably connected with the piston rod and a lubricating ring fixedly arranged on the wear-resisting ring, and the inner ring wall of the wear-resisting ring and the inner ring wall of the lubricating ring are both tightly attached to the outer wall of the piston rod. The inner ring wall of the wear-resisting ring is provided with a plurality of wear-resisting grooves distributed circumferentially, the extending direction of the wear-resisting grooves is consistent with the sliding direction of the piston rod, and the outer wall of the piston rod is provided with a plurality of wear-resisting strips which correspond to the wear-resisting grooves one to one and can be in sliding fit with the wear-resisting grooves respectively. A lubricating layer capable of being tightly attached to the outer wall of the piston rod and the wear-resisting strips is arranged on the inner ring wall of the lubricating ring, the piston rod and the wear-resisting ring are in sliding connection through sliding fit of the wear-resisting strips and the wear-resisting grooves, friction can be reduced, and wear resistance is enhanced.

Description

Technical Field

[0001] The utility model relates to a wear-resistant hydraulic oil cylinder. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation. When it is used to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap and the motion is smooth. Therefore, it is widely used in the hydraulic systems of various machines. The output force of the hydraulic cylinder is proportional to the effective area of ​​the piston and the pressure difference on both sides. The hydraulic motor realizes continuous rotary motion, while the hydraulic cylinder realizes reciprocating motion.

[0003] The reciprocating motion of the hydraulic cylinder will cause wear on the inner wall of the cylinder, which will slowly form scratches. The degree of wear is also irregular and uneven, which will affect the working use of the hydraulic cylinder in the long run.

[0004] For this purpose, a hydraulic cylinder that is resistant to friction is required. Utility Model Content

[0005] The utility model aims to provide a wear-resistant hydraulic oil cylinder which can reduce the friction area and enhance the wear resistance.

[0006] The technical solution for achieving the purpose of the utility model is as follows: the utility model comprises a cylinder, a piston rod slidably arranged in the cylinder, and a piston fixedly arranged on the piston rod and slidably arranged in the cylinder; a wear-resistant component is detachably arranged at the opening of the cylinder, the wear-resistant component comprises a wear-resistant ring detachably arranged at the opening of the cylinder and slidably connected to the piston rod, and a lubricating ring fixedly arranged on the wear-resistant ring, the inner ring walls of the wear-resistant ring and the lubricating ring both fit tightly with the outer wall of the piston rod; a plurality of wear-resistant grooves distributed circumferentially with the ring center of the wear-resistant ring as the center are arranged on the inner ring wall of the wear-resistant ring, the extension direction of the wear-resistant grooves is consistent with the sliding direction of the piston rod, a plurality of wear-resistant strips corresponding to the wear-resistant grooves one by one and which can form a sliding fit respectively are arranged on the outer wall of the piston rod, a lubricating layer which can fit tightly with the outer wall of the piston rod and the wear-resistant strip is arranged on the inner ring wall of the lubricating ring, and the piston rod and the wear-resistant ring form a sliding connection through the sliding fit of the wear-resistant strip and the wear-resistant groove.

[0007] Furthermore, the wear-resistant ring includes a first half ring and a second half ring, and an extension plate is fixedly provided on the outer walls of the first half ring and the second half ring, and a plurality of first screw holes are provided on the extension plate, and a plurality of second screw holes corresponding to the first screw holes are provided on the cylinder barrel, and a first bolt that can form a threaded match with the first thread and the second screw hole is also provided, and the wear-resistant ring is detachably arranged on the cylinder barrel through the threaded match between the first bolt and the first screw hole on the extension plate and the second screw hole on the cylinder barrel; a clamping plate is rotatably provided at the end of both sides of the first half ring, and a through hole is provided on the clamping plate, and a threaded groove corresponding to the through hole is provided at the end of both sides of the second half ring after the clamping plate on the corresponding side is rotated, and a second bolt that can pass through the through hole and form a threaded match with the threaded groove is also provided, and the first half ring is detachably fixed to the second half ring through the threaded match between the second bolt and the threaded groove after the second bolt passes through the through hole.

[0008] Furthermore, the lubrication ring includes a third half ring fixedly arranged on the first half ring and a fourth half ring fixedly arranged on the second half ring, the third half ring and the fourth half ring are both hollow, the third half ring and the fourth half ring are respectively provided with filling tubes connected to the interior and used for filling lubricant into the interior, the inner ring walls of the third half ring and the fourth half ring are both provided with a plurality of fine holes connected to the interior, the lubrication layer on the inner ring wall of the third half ring is connected to the interior of the third half ring through the plurality of fine holes on the inner ring wall of the third half ring, and the lubrication layer on the inner ring wall of the fourth half ring is connected to the interior of the fourth half ring through the plurality of fine holes on the inner ring wall of the fourth half ring.

[0009] Furthermore, the first half ring and the second half ring are both provided with an extension plate extending into the interior of the cylinder and fitted with the outer wall of the piston rod, the wear-resistant groove on the first half ring extends to the extension plate located on the first half ring, and the wear-resistant groove on the second half ring extends to the extension plate located on the second half ring.

[0010] Furthermore, a sealing ring is provided at the opening of the cylinder barrel, and the sealing ring is located between the cylinder barrel, the wear-resistant ring and the extension plate.

[0011] Furthermore, a plurality of guide grooves are provided on the inner wall of the cylinder along the extension direction of the cylinder and with the axis of the cylinder as the center circumference. A guide block is provided on the piston which can form a sliding fit with the guide groove. The piston is slidably set inside the cylinder through the sliding fit between the guide block and the guide groove.

[0012] Furthermore, the wear-resistant grooves, the wear-resistant strips, the guide grooves, the guide blocks and the piston rod are all provided with wear-resistant coatings.

[0013] The utility model has positive effects: (1) the wear-resistant component of the utility model includes a wear-resistant ring which is detachably arranged at the opening of the cylinder and slidably connected to the piston rod, and a lubricating ring which is fixedly arranged on the wear-resistant ring. A plurality of wear-resistant grooves are arranged on the inner ring wall of the wear-resistant ring. A plurality of wear-resistant strips which correspond to the wear-resistant grooves one by one and can respectively form a sliding fit are arranged on the outer wall of the piston rod. The piston rod and the wear-resistant ring form a sliding connection through the sliding fit between the wear-resistant strips and the wear-resistant grooves. The friction between the piston rod and the sleeve is reduced by avoiding direct friction of the outer wall of the piston rod through the separate sliding between the wear-resistant strips and the wear-resistant grooves. At the same time, the wear-resistant coating on the wear-resistant grooves and the wear-resistant strips can enhance the friction resistance between the wear-resistant grooves and the wear-resistant strips, thereby extending the service life.

[0014] (2) The wear-resistant ring of the utility model comprises a first half ring and a second half ring, and an extension plate is fixedly provided on the outer wall of the first half ring and the second half ring. The wear-resistant ring is detachably arranged on the cylinder barrel through the threaded cooperation between the first bolt and the first screw hole on the extension plate and the second screw hole on the cylinder barrel. The first half ring and the second half ring can be removed from the cylinder barrel after use through the cooperation between the first bolt and the first screw hole and the second screw hole, so as to facilitate replacement, quickly and conveniently.

[0015] (3) The first half ring of the utility model is rotatably provided with a clamping plate, and the clamping plate is provided with a through hole. The second half ring is provided with a threaded groove corresponding to the through hole, and is also provided with a second bolt that can pass through the through hole and form a threaded match with the threaded groove. The first half ring is detachably fixed to the second half ring through the threaded match of the second bolt passing through the through hole and the threaded match of the threaded groove. Through the cooperation of the second bolt and the threaded hole, the first half ring and the second half ring are combined into a wear-resistant ring that is more stable, ensuring that when the piston rod slides, the first half ring and the second half ring will not spread out and affect use.

[0016] (4) The first half ring and the second half ring of the utility model are both provided with an extension plate extending into the interior of the cylinder and fittingly arranged with the outer wall of the piston rod. The wear-resistant groove on the first half ring extends to the extension plate located on the first half ring, and the wear-resistant groove on the second half ring extends to the extension plate located on the second half ring. The extension plate extends into the interior of the cylinder to increase the contact area between the piston rod and the wear-resistant ring, and the sliding stroke between the wear-resistant strip and the wear-resistant groove on the piston rod is also longer, making the sliding smoother.

[0017] (5) The lubricating ring of the utility model comprises a third half ring fixedly arranged on the first half ring and a fourth half ring fixedly arranged on the second half ring. The inner ring walls of the third half ring and the fourth half ring are provided with a plurality of fine holes connected with the interior. The lubricating layer is connected with the interior of the lubricating ring through the fine holes. The lubricating layer fits the outer wall of the piston rod and the wear-resistant strip. The lubricating layer can lubricate the outer wall of the piston rod and the wear-resistant strip, thereby reducing the wear caused by the reciprocating motion of the piston rod.

[0018] (6) The inner wall of the cylinder of the utility model is provided with a plurality of guide grooves which are arranged along the extension direction of the cylinder and are circumferentially centered on the axis of the cylinder. The piston is provided with a guide block which can form a sliding fit with the guide groove. The piston is slidably arranged inside the cylinder through the sliding fit between the guide block and the guide groove. The piston can guide the sliding through the fit between the guide block and the guide groove, so that the wear-resistant strip is always fit with the wear-resistant groove, while reducing the contact area between the outer wall of the piston and the inside of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to specific embodiments and in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a side sectional view of the utility model;

[0022] Figure 3 for Figure 2 A partial enlarged view of the middle part;

[0023] Figure 4 It is a top view of the wear-resistant component of the utility model. DETAILED DESCRIPTION

[0024] See Figures 1 to 4 The utility model comprises a cylinder 1, a piston rod 2 slidably arranged in the cylinder 1, and a piston 3 fixedly arranged on the piston rod 2 and slidably arranged in the cylinder 1; a wear-resistant component 4 is detachably arranged at the opening of the cylinder 1, and the wear-resistant component 4 comprises a wear-resistant ring 41 detachably arranged at the opening of the cylinder 1 and slidably connected with the piston rod 2, and a lubricating ring 42 fixedly arranged on the wear-resistant ring 41, and the inner ring walls of the wear-resistant ring 41 and the lubricating ring 42 are tightly fitted with the outer wall of the piston rod 2; the wear-resistant ring 4 The inner ring wall of 1 is provided with a plurality of wear-resistant grooves 5 distributed circumferentially with the ring center of the wear-resistant ring 41 as the center, and the extension direction of the wear-resistant grooves 5 is consistent with the sliding direction of the piston rod 2. The outer wall of the piston rod 2 is provided with a plurality of wear-resistant strips 21 corresponding to the wear-resistant grooves 5 one by one and can form a sliding fit respectively. The inner ring wall of the lubricating ring 42 is provided with a lubricating layer 6 that can closely fit the outer wall of the piston rod 2 and the wear-resistant strips 21. The piston rod 2 and the wear-resistant ring 41 form a sliding connection through the sliding fit between the wear-resistant strips 21 and the wear-resistant grooves 5.

[0025] The lubricating layer 6 can be made of a flexible material such as a sponge or a fine brush that can store lubricants.

[0026] The wear-resistant ring 41 includes a first half ring 411 and a second half ring 412. An extension plate 413 is fixedly provided on the outer walls of the first half ring 411 and the second half ring 412. The extension plate 413 is provided with a plurality of first screw holes. The cylinder barrel 1 is provided with a plurality of second screw holes corresponding to the first screw holes one by one. A first bolt 7 that can form a threaded match with the first thread and the second screw hole is also provided. The wear-resistant ring 41 is detachably arranged on the cylinder barrel 1 through the threaded match between the first bolt 7 and the first screw hole on the extension plate 413 and the second screw hole on the cylinder barrel 1; a clamping plate 4111 is rotatably provided at the ends of both sides of the first half ring 411, and a through hole is provided on the clamping plate 4111. A threaded groove that is corresponding to the through hole is provided at the ends of both sides of the second half ring 412 after the clamping plate 4111 on the corresponding side is rotated. A second bolt 8 that can pass through the through hole and form a threaded match with the threaded groove is also provided. The first half ring 411 is detachably fixed to the second half ring 412 through the threaded match between the second bolt 8 and the threaded groove after passing through the through hole.

[0027] The lubrication ring 42 includes a third half ring 421 fixedly arranged on the first half ring 411 and a fourth half ring 422 fixedly arranged on the second half ring 412. The third half ring 421 and the fourth half ring 422 are both hollow. The third half ring 421 and the fourth half ring 422 are respectively provided with a filling tube 9 connected to the interior and used for filling lubricant into the interior. The inner ring walls of the third half ring 421 and the fourth half ring 422 are both provided with a plurality of fine holes connected to the interior. The lubrication layer 6 on the inner ring wall of the third half ring 421 is connected to the interior of the third half ring 421 through the plurality of fine holes on the inner ring wall of the third half ring 421, and the lubrication layer 6 on the inner ring wall of the fourth half ring 422 is connected to the interior of the fourth half ring 422 through the plurality of fine holes on the inner ring wall of the fourth half ring 422.

[0028] The third half ring 421 and the fourth half ring 422 of the lubricating ring 42 can be tightly matched with the thread groove after the first half ring 411 and the second half ring 412 pass through the clamping plate 4111 through the second bolt 8.

[0029] The filling tube 9 is provided with a sealing cap for sealing or is directly connected to an external filling device.

[0030] The first half ring 411 and the second half ring 412 are both provided with an extension plate 414 extending into the interior of the cylinder 1 and fitted against the outer wall of the piston rod 2; the wear-resistant groove 5 on the first half ring 411 extends to the extension plate 414 located on the first half ring 411 , and the wear-resistant groove 5 on the second half ring 412 extends to the extension plate 414 located on the second half ring 412 .

[0031] A sealing ring 11 is provided at the opening of the cylinder barrel 1 , and the sealing ring 11 is located between the cylinder barrel 1 , the wear-resistant ring 41 and the extension plate 414 .

[0032] The inner wall of the cylinder 1 is provided with a plurality of guide grooves 12 which are arranged along the extension direction of the cylinder 1 and are circumferentially centered around the axis of the cylinder 1. The piston 3 is provided with a guide block 31 which can form a sliding fit with the guide groove 12. The piston 3 is slidably arranged inside the cylinder 1 through the sliding fit between the guide block 31 and the guide groove 12.

[0033] The wear-resistant groove 5 , the wear-resistant strip 21 , the guide groove 12 , the guide block 31 and the piston rod 2 are all provided with a wear-resistant coating.

[0034] The lubricating ring 42 is also provided with a sealing ring 1-0 for filling the gap between the lubricating ring 42 and the piston rod 2 and preventing dust from entering and oil leakage. The sealing ring 1-0 is located at the joint between the lubricating ring 42 and the piston rod 2 to prevent the oil inside the cylinder 1 from being brought out when the piston rod 2 slides.

[0035] The working principle of the utility model is as follows: the first half ring 411 and the second ring plate are detachably combined with the thread of the thread groove after the second bolt 8 passes through the through hole to form a wear-resistant ring 41; the wear-resistant ring 41 is detachably arranged on the cylinder barrel 1 through the thread of the first bolt 7, the first screw hole on the extension plate 413 and the second screw hole on the cylinder barrel 1; the inner ring wall of the wear-resistant ring 41 fits with the outer wall of the piston rod 2 and the wear-resistant groove 5 on the wear-resistant ring 41 forms a sliding fit with the wear-resistant strip 21 on the piston rod 2, and the lubricating ring 42 fixedly arranged on the wear-resistant ring 41 The inner ring wall is tightly fitted to the outer wall of the piston rod 2, and lubricant is filled into the interior of the lubricating ring 42 from the filling tube 9 on the lubricating ring 42. The lubricant flows from the pores to the lubricating layer 6, and the lubricating layer 6 lubricates the outer wall of the piston rod 2; the guide block 31 on the piston 3 in the cylinder 1 forms a sliding fit with the guide groove 12 in the cylinder 1, and the outer wall of the piston 3 is fitted with the inner wall of the cylinder 1; the piston rod 2 can reduce the friction with the cylinder 1 under the sliding fit between the wear-resistant strip 21 and the wear-resistant groove 5 and the sliding fit between the guide groove 12 and the guide block 31.

[0036] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is 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 wear-resistant hydraulic cylinder, comprising a cylinder barrel (1), a piston rod (2) slidably arranged in the cylinder barrel (1), and a piston (3) fixedly arranged on the piston rod (2) and slidably arranged in the cylinder barrel (1); characterized in that: The opening of the cylinder (1) is detachably provided with a wear-resistant assembly (4), the wear-resistant assembly (4) comprising a wear-resistant ring (41) detachably provided at the opening of the cylinder (1) and slidably connected to the piston rod (2), and a lubricating ring (42) fixedly provided on the wear-resistant ring (41), the inner ring walls of the wear-resistant ring (41) and the lubricating ring (42) both being tightly fitted with the outer wall of the piston rod (2); the inner ring wall of the wear-resistant ring (41) is provided with a plurality of circumferentially distributed around the center of the wear-resistant ring (41). A wear-resistant groove (5) is provided, wherein the extension direction of the wear-resistant groove (5) is consistent with the sliding direction of the piston rod (2); a plurality of wear-resistant strips (21) are provided on the outer wall of the piston rod (2) and correspond to the wear-resistant grooves (5) one by one and can respectively form a sliding fit; a lubricating layer (6) is provided on the inner ring wall of the lubricating ring (42) and can closely fit the outer wall of the piston rod (2) and the wear-resistant strips (21); the piston rod (2) and the wear-resistant ring (41) form a sliding connection through the sliding fit between the wear-resistant strips (21) and the wear-resistant grooves (5).

2. The wear-resistant hydraulic cylinder according to claim 1, characterized in that: The wear-resistant ring (41) comprises a first half ring (411) and a second half ring (412); an extension plate (413) is fixedly provided on the outer wall of each of the first half ring (411) and the second half ring (412); a plurality of first screw holes are provided on the extension plate (413); a plurality of second screw holes corresponding to the first screw holes are provided on the cylinder barrel (1); a first bolt (7) is provided which can form a threaded fit with the first thread and the second screw hole; the wear-resistant ring (41) is connected to the first screw hole on the extension plate (413) and the second screw hole on the cylinder barrel (1) through the first bolt (7) The first half ring (411) is rotatably provided with a clamping plate (4111) at the ends of both sides of the first half ring (411), and the clamping plate (4111) is provided with a through hole. The second half ring (412) is provided with a thread groove corresponding to the through hole after the clamping plate (4111) on the corresponding side is rotated, and a second bolt (8) is also provided to pass through the through hole and form a thread groove to form a thread. The first half ring (411) is detachably fixed to the second half ring (412) by the second bolt (8) passing through the through hole and the thread groove to form a thread.

3. The wear-resistant hydraulic cylinder according to claim 2, characterized in that: The lubricating ring (42) comprises a third half ring (421) fixedly arranged on the first half ring (411) and a fourth half ring (422) fixedly arranged on the second half ring (412); the third half ring (421) and the fourth half ring (422) are both hollow; the third half ring (421) and the fourth half ring (422) are respectively provided with a filling tube (9) which is connected to the interior and is used to fill the interior with lubricant; the inner ring walls of the third half ring (421) and the fourth half ring (422) are both provided with a plurality of fine holes connected to the interior; the lubricating layer (6) on the inner ring wall of the third half ring (421) is connected to the interior of the third half ring (421) through the plurality of fine holes on the inner ring wall of the third half ring (421); and the lubricating layer (6) on the inner ring wall of the fourth half ring (422) is connected to the interior of the fourth half ring (422) through the plurality of fine holes on the inner ring wall of the fourth half ring (422).

4. The wear-resistant hydraulic cylinder according to claim 2, characterized in that: The first half ring (411) and the second half ring (412) are both provided with an extension plate (414) extending into the interior of the cylinder (1) and being arranged in close contact with the outer wall of the piston rod (2); the wear-resistant groove (5) on the first half ring (411) extends to the extension plate (414) located on the first half ring (411); and the wear-resistant groove (5) on the second half ring (412) extends to the extension plate (414) located on the second half ring (412).

5. The wear-resistant hydraulic cylinder according to claim 4, characterized in that: A sealing ring (11) is provided at the opening of the cylinder barrel (1), and the sealing ring (11) is located between the cylinder barrel (1), the wear-resistant ring (41) and the extension plate (414).

6. The wear-resistant hydraulic cylinder according to claim 1, characterized in that: The inner wall of the cylinder (1) is provided with a plurality of guide grooves (12) which are arranged along the extension direction of the cylinder (1) and have the axis of the cylinder (1) as the central circumference. The piston (3) is provided with a guide block (31) which can form a sliding fit with the guide groove (12). The piston (3) is slidably arranged inside the cylinder (1) through the sliding fit between the guide block (31) and the guide groove (12).

7. The wear-resistant hydraulic cylinder according to claim 6, characterized in that: The wear-resistant groove (5), the wear-resistant strip (21), the guide groove (12), the guide block (31) and the piston rod (2) are all provided with a wear-resistant coating.

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