Wear-resistant oil cylinder

Abstract

The utility model discloses a wear-resistant oil cylinder, which relates to the technical field of hydraulic oil cylinders and comprises a cylinder body, a piston rod is arranged at the top end of the cylinder body, an upper piston seat and a lower piston seat are arranged at the bottom end of the piston rod, and a piston sealing ring is arranged between the upper piston seat and the lower piston seat. The cylinder body is arranged, the piston rod is arranged in the cylinder body, the upper piston seat and the lower piston seat are arranged at the bottom end of the piston rod, the piston sealing ring is arranged between the upper piston seat and the lower piston seat, and the piston sealing ring is installed in the groove between the upper piston seat and the lower piston seat. The upper piston seat and the lower piston seat are connected through the spline shaft and the shaft sleeve, the spline shaft and the shaft sleeve are connected through the locking bolt, and the upper piston seat and the lower piston seat can be separated by removing the locking bolt, so that the piston sealing ring can be conveniently removed and replaced, and the piston sealing ring can be rapidly replaced when being abraded; the service life of the hydraulic oil cylinder is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinders, in particular to a wear-resistant 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. However, the piston seat inside many cylinders will slide against the inner wall of the cylinder repeatedly for a long time and cause friction when pushed back and forth by the liquid. Over time, the piston seat is easily worn out, reducing the service life of the hydraulic cylinder.

[0003] For example, a wear-resistant oil cylinder with publication number CN213928979U includes a cylinder head bolted to a cylinder barrel, a piston rod slidably connected to the cylinder head, and a piston seat installed at the bottom of the piston rod in the cylinder barrel, and at least two sets of auxiliary mechanisms for assisting the movement of the piston seat. The auxiliary mechanism is installed in the L-shaped installation groove preset in the cylinder barrel wall, and the auxiliary mechanism is slidably connected to the piston seat. The oil inlet below the piston seat is preset on the cylinder barrel. The wear-resistant oil cylinder improves the friction between the piston seat and the cylinder barrel by means of an auxiliary mechanism arranged in the cylinder head and capable of being connected to the cylinder barrel. The auxiliary mechanism includes a pushing device that can be slidably connected to the piston seat and separates the piston seat from the cylinder barrel by a slight distance, so as to assist in pushing the piston seat to move without affecting the normal movement of the piston seat.

[0004] In practical application, the above technical solution still cannot solve the problem that the friction loss between the piston seat and the inner wall of the oil cylinder affects the service life of the oil cylinder.

[0005] Therefore, it is necessary to invent a wear-resistant oil cylinder to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a wear-resistant oil cylinder to solve the problems raised in the above background technology.

[0007] The top end of the piston rod is provided with a piston rod, the bottom end of the piston rod is provided with an upper piston seat and a lower piston seat, and a piston sealing ring is provided between the upper piston seat and the lower piston seat, and a groove is provided on the side where the upper piston seat and the lower piston seat are close to each other, and the piston sealing ring is arranged inside the groove, and a spline shaft is fixedly provided in the middle part of the upper surface of the lower piston seat, and a shaft sleeve is fixedly provided in the middle part of the lower surface of the upper piston seat, and the shaft sleeve corresponds to the spline shaft, and a plurality of positioning holes are arranged around the upper surface of the upper piston seat, and a locking bolt is penetrated through the inside of the positioning hole, and a plurality of screw holes corresponding to the locking bolts are opened around the top end of the spline shaft, and a plurality of pressure blocks are arranged around the side where the upper piston seat and the lower piston seat are close to each other, and a plurality of pressure grooves corresponding to the pressure blocks are opened around the two ends of the piston sealing ring.

[0008] Preferably, the outer side wall of the piston sealing ring is provided with a plurality of deformation grooves of annular structure, and the cross-section of the deformation groove is arranged to be an isosceles trapezoidal structure.

[0009] Preferably, a mounting nut is fixedly provided in the middle of the upper surface of the upper piston seat, and the bottom end of the piston rod is movably arranged inside the mounting nut through a thread.

[0010] Preferably, a positioning sleeve is fixedly provided at the top end of the mounting nut, a positioning bolt is penetrated through a screw hole opened in the middle of the outer wall of the positioning sleeve, and one end of the positioning bolt is fitted with the bottom end of the outer wall of the piston rod.

[0011] Preferably, an end cover is provided at the top end of the cylinder body, and a plurality of arc-shaped grooves are arranged around the outer side wall of the end cover.

[0012] Preferably, a mounting seat with an annular structure is fixedly provided at the bottom end of the end cover, and the mounting seat is movably arranged on the top end of the cylinder body through threads.

[0013] Technical effects and advantages of the utility model:

[0014] 1. The utility model is provided with a cylinder body, a piston rod is provided inside the cylinder body, an upper piston seat and a lower piston seat are provided at the bottom end of the piston rod, a piston sealing ring is provided between the upper piston seat and the lower piston seat, and the piston sealing ring is installed in a groove between the upper piston seat and the lower piston seat, the upper piston seat and the lower piston seat are connected by a spline shaft and a sleeve, and the spline shaft and the sleeve are connected by a locking bolt, and the upper piston seat and the lower piston seat can be separated by removing the locking bolt, thereby facilitating the disassembly and replacement of the piston sealing ring, so that the piston sealing ring can be quickly replaced when it is worn, so as to improve the service life of the hydraulic cylinder;

[0015] 2. The utility model provides a piston sealing ring with a plurality of deformation grooves around the outer side of the piston sealing ring. When the piston sealing ring moves up and down in the cylinder body, it can be deformed to a certain extent along the deformation groove, thereby increasing the sealing effect between the piston sealing ring and the cylinder body. The deformed piston sealing ring expands outward, so that the piston sealing ring after partial wear can still play a sealing effect, thereby effectively improving the service life of the piston sealing ring and the hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a schematic cross-sectional view of the overall structure of the utility model.

[0018] Figure 3 It is a schematic diagram of the end cover structure of the utility model.

[0019] Figure 4 It is a schematic diagram of the structure of the upper piston seat and the lower piston seat of the utility model.

[0020] Figure 5 It is an exploded view of the upper piston seat and the lower piston structure of the utility model.

[0021] In the figure: 1. cylinder body; 2. piston rod; 3. upper piston seat; 4. lower piston seat; 5. piston sealing ring; 6. groove; 7. spline shaft; 8. bushing; 9. positioning hole; 10. locking bolt; 11. pressure block; 12. pressure groove; 13. deformation groove; 14. mounting nut; 15. positioning sleeve; 16. positioning bolt; 17. end cover; 18. mounting seat. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides Figure 1-5 A wear-resistant oil cylinder shown in the figure comprises a cylinder body 1, a piston rod 2 is arranged at the top end of the cylinder body 1, an upper piston seat 3 and a lower piston seat 4 are arranged at the bottom end of the piston rod 2, a piston sealing ring 5 is arranged between the upper piston seat 3 and the lower piston seat 4, a groove 6 is arranged on the side where the upper piston seat 3 and the lower piston seat 4 are close to each other, and the piston sealing ring 5 is arranged inside the groove 6;

[0024] Specifically, a spline shaft 7 is fixedly provided in the middle of the upper surface of the lower piston seat 4, a shaft sleeve 8 is fixedly provided in the middle of the lower surface of the upper piston seat 3, and the shaft sleeve 8 corresponds to the spline shaft 7, a plurality of positioning holes 9 are arranged around the upper surface of the upper piston seat 3, a locking bolt 10 is penetrated through the interior of the positioning hole 9, a plurality of screw holes corresponding to the locking bolt 10 are opened around the top end of the spline shaft 7, and the locking bolt 10 can realize the locking and fixing between the lower piston seat 4 and the upper piston seat 3;

[0025] More specifically, a plurality of pressure blocks 11 are arranged around the sides of the upper piston seat 3 and the lower piston seat 4 that are close to each other, and a plurality of pressure grooves 12 corresponding to the pressure blocks 11 are arranged around both ends of the piston sealing ring 5. The pressure blocks 11 cooperate with the pressure grooves 12 to improve the installation stability of the piston sealing ring 5. A plurality of deformation grooves 13 of annular structure are arranged on the outer wall of the piston sealing ring 5, and the cross-section of the deformation groove 13 is set to an isosceles trapezoidal structure. When the piston sealing ring 5 moves up and down in the cylinder body 1, it can be deformed to a certain extent along the deformation groove 13, thereby increasing the sealing effect between the piston sealing ring 5 and the cylinder body 1, and the deformed piston sealing ring 5 expands outward, so that the piston sealing ring 5 that is partially worn can still play a sealing effect;

[0026] In addition, a mounting nut 14 is fixedly provided in the middle of the upper surface of the upper piston seat 3, and the bottom end of the piston rod 2 is movably provided inside the mounting nut 14 through a thread, and a positioning sleeve 15 is fixedly provided at the top of the mounting nut 14, and a positioning bolt 16 is penetrated in a screw hole opened in the middle of the outer wall of the positioning sleeve 15, and one end of the positioning bolt 16 is fitted with the bottom end of the outer wall of the piston rod 2, and the positioning bolt 16 can limit the rotation of the piston rod 2 to ensure the stability of the installation of the piston rod 2;

[0027] Moreover, an end cover 17 is provided at the top of the cylinder body 1, and a plurality of arc grooves are arranged around the outer wall of the end cover 17. The arrangement of the arc grooves facilitates the rotation of the end cover 17. A mounting seat 18 with an annular structure is fixedly provided at the bottom end of the end cover 17, and the mounting seat 18 is movably arranged at the top of the cylinder body 1 through threads, and the mounting seat 18 can realize the installation of the end cover 17.

[0028] Working principle of this utility model:

[0029] When the device is in use, the cylinder body 1 can realize the injection and discharge of hydraulic oil through the hydraulic oil pipe at the bottom end thereof, and the hydraulic oil can push the piston rod 2 to move through the upper piston seat 3, the lower piston seat 4 and the piston sealing ring 5 to realize the driving of the hydraulic oil cylinder. During the process of the piston sealing ring 5 sliding up and down inside the cylinder body 1, it can be deformed to a certain extent along the deformation groove 13, thereby increasing the sealing effect between the piston sealing ring 5 and the cylinder body 1;

[0030] When the piston sealing ring 5 needs to be replaced, first rotate the end cover 17 to separate the end cover 17 from the cylinder body 1, then pull the upper piston seat 3 and the lower piston seat 4 out of the cylinder body 1 through the piston rod 2, and rotate to remove the locking bolt 10, so that the limit between the spline shaft 7 and the sleeve 8 is released. At this time, the limit between the upper piston seat 3 and the lower piston seat 4 is released, and the lower piston seat 4 can be removed downward. At this time, the limit of the piston sealing ring 5 is released, and the piston sealing ring 5 can be replaced. After the piston sealing ring 5 is replaced, repeat the above steps in reverse to complete the installation of the piston sealing ring 5.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A wear-resistant oil cylinder, comprising a cylinder body (1), characterized in that: The top end of the cylinder body (1) is provided with a piston rod (2), the bottom end of the piston rod (2) is provided with an upper piston seat (3) and a lower piston seat (4), a piston sealing ring (5) is provided between the upper piston seat (3) and the lower piston seat (4), a groove (6) is provided on the side where the upper piston seat (3) and the lower piston seat (4) are close to each other, and the piston sealing ring (5) is arranged inside the groove (6), a spline shaft (7) is fixedly provided in the middle of the upper surface of the lower piston seat (4), and a shaft is fixedly provided in the middle of the lower surface of the upper piston seat (3). A sleeve (8) is provided, and the sleeve (8) corresponds to the spline shaft (7); a plurality of positioning holes (9) are arranged around the upper surface of the upper piston seat (3); a locking bolt (10) is penetrated through the interior of the positioning hole (9); a plurality of screw holes corresponding to the locking bolt (10) are arranged around the top end of the spline shaft (7); a plurality of pressure blocks (11) are arranged around the sides of the upper piston seat (3) and the lower piston seat (4) close to each other; and a plurality of pressure grooves (12) corresponding to the pressure blocks (11) are arranged around the two ends of the piston sealing ring (5).

2. The wear-resistant oil cylinder according to claim 1, characterized in that: The outer side wall of the piston sealing ring (5) is provided with a plurality of deformation grooves (13) of annular structure, and the cross section of the deformation groove (13) is arranged to be an isosceles trapezoidal structure.

3. The wear-resistant oil cylinder according to claim 2, characterized in that: A mounting nut (14) is fixedly arranged in the middle of the upper surface of the upper piston seat (3), and the bottom end of the piston rod (2) is movably arranged inside the mounting nut (14) through a thread.

4. The wear-resistant oil cylinder according to claim 3, characterized in that: A positioning sleeve (15) is fixedly provided at the top end of the mounting nut (14), a positioning bolt (16) is penetrated through a screw hole provided in the middle of the outer wall of the positioning sleeve (15), and one end of the positioning bolt (16) is fitted with the bottom end of the outer wall of the piston rod (2).

5. The wear-resistant oil cylinder according to claim 4, characterized in that: An end cover (17) is arranged at the top end of the cylinder body (1), and a plurality of arc-shaped grooves are arranged around the outer side wall of the end cover (17).

6. The wear-resistant oil cylinder according to claim 5, characterized in that: A mounting seat (18) with an annular structure is fixedly provided at the bottom end of the end cover (17), and the mounting seat (18) is movably arranged on the top end of the cylinder body (1) through threads.

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