A rocker arm lifting cylinder

Abstract

This utility model relates to the field of hydraulic cylinder technology, specifically to a rocker arm lifting cylinder, including a cylinder body with a cavity inside. A piston rod is disposed within the cavity, and a piston is disposed at the bottom of the piston rod. The piston and piston rod are mounted together by a first screw. A piston seal is also provided on the outer wall of the piston. A guide sleeve is provided at the end of the cylinder body, and a first positioning groove is provided on the guide sleeve. A second positioning groove is provided on the inner wall of the cylinder body. A first positioning block is disposed in the first positioning groove, and the first positioning block is connected to the guide sleeve by a second screw. A third positioning groove is provided on the first positioning block, and a second positioning block is fitted between the second and third positioning grooves. Several ribs are provided on the outer wall of the cylinder body. This utility model improves the stability and reliability of the cylinder operation, prevents cylinder body deformation, and extends the service life of the cylinder.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a rocker arm lifting cylinder. Background Technology

[0002] In the fields of engineering machinery and industrial automation, the rocker arm lifting cylinder is the core hydraulic actuator that drives the lifting of the boom or platform, and its performance directly affects the stability, load-bearing capacity and service life of the equipment.

[0003] Traditional lifting cylinders typically rely on threads or flanges to fix the guide sleeve. However, under high-frequency vibration, large lateral loads, or harsh working conditions, they are prone to loosening, leading to piston rod wear, seal failure, or even hydraulic oil leakage. Furthermore, when the cylinder body is subjected to asymmetrical loads, it is prone to deformation due to bending moment or torque, affecting the stability of the cylinder in use. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a rocker arm lifting cylinder, which improves the stability and reliability of cylinder operation, prevents cylinder deformation, and extends the service life of the cylinder.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: a rocker arm lifting cylinder includes a cylinder body, a cavity is formed inside the cylinder body, a piston rod is provided inside the cavity, a piston is provided at the bottom of the piston rod, the piston and the piston rod are installed by a first screw, a piston seal is also provided on the outer wall of the piston, a guide sleeve is also provided at the end of the cylinder body, a first positioning groove is formed on the guide sleeve, a second positioning groove is formed on the inner wall of the cylinder body, a first positioning block is provided in the first positioning groove, the first positioning block is connected to the guide sleeve by a second screw, a third positioning groove is formed on the first positioning block, a second positioning block is connected between the second positioning groove and the third positioning groove, and a plurality of ribs are provided on the outer wall of the cylinder body.

[0006] As a further embodiment of this utility model: a first sealing ring is provided between the piston and the piston rod, and a second sealing ring is provided between the guide sleeve and the inner wall of the cylinder.

[0007] As a further improvement of this utility model, the inner wall of the guide sleeve is provided with several guide rings.

[0008] As a further improvement of this utility model, the inner wall of the guide sleeve is also provided with a dustproof ring.

[0009] As a further embodiment of this utility model: the ribs are arranged radially along the cylinder body, and the ribs include a first rib, a second rib, and a third rib. The included angle between the second rib and the third rib along the cylinder body axis is 90°, and the included angle between the first rib and the second and third ribs along the cylinder body axis is 135°.

[0010] As a further embodiment of this utility model: the first rib is provided with a mounting base, and both the first rib and the mounting base are provided with mounting holes, in which screws are screwed.

[0011] As a further improvement of this utility model, a pin hole is provided at the end of the piston rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. By setting the first positioning block and the second positioning block, this utility model prevents the guide sleeve from loosening under high-frequency vibration, reduces the wear of the piston rod, and improves the stability and reliability of the cylinder operation.

[0014] 2. By setting ribs at specific angles, this utility model improves the stability of the cylinder body, prevents cylinder deformation, and extends the service life of the hydraulic cylinder. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the rocker arm lifting cylinder of this utility model.

[0016] Figure 2 This is a front sectional view of the rocker arm lifting cylinder of this utility model;

[0017] Figure 3 This is a top view of the rocker arm lifting cylinder of this utility model.

[0018] Figure 4 This is a side view of the rocker arm lifting cylinder of this utility model.

[0019] In the diagram: 1. Cylinder body; 2. Cavity; 3. Piston rod; 4. Piston; 5. First screw; 6. Piston seal; 7. Guide sleeve; 8. First positioning groove; 9. Second positioning groove; 10. First positioning block; 11. Second screw; 12. Third positioning groove; 13. Second positioning block; 14. Rib; 141. First rib; 142. Second rib; 143. Third rib; 15. First sealing ring; 16. Second sealing ring; 17. Guide ring; 18. Dustproof ring; 19. Mounting base; 20. Mounting hole; 21. Pin hole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] refer to Figures 1 to 4 A rocker arm lifting cylinder includes a cylinder body 1, a cavity 2 inside the cylinder body 1, a piston rod 3 inside the cavity 2, a piston 4 at the bottom of the piston rod 3, the piston 4 and the piston rod 3 being installed by a first screw 5, a piston seal 6 on the outer wall of the piston 4, a guide sleeve 7 at the end of the cylinder body 1, a first positioning groove 8 on the guide sleeve 7, a second positioning groove 9 on the inner wall of the cylinder body 1, a first positioning block 10 in the first positioning groove 8, the first positioning block 10 being connected to the guide sleeve 7 by a second screw 11, a third positioning groove 12 on the first positioning block 10, a second positioning block 13 being connected between the second positioning groove 9 and the third positioning groove 12, and a plurality of ribs 14 on the outer wall of the cylinder body 1.

[0022] A first sealing ring 15 is provided between the piston 4 and the piston rod 3, and a second sealing ring 16 is provided between the guide sleeve 7 and the inner wall of the cylinder 1.

[0023] The inner wall of the guide sleeve 7 is provided with several guide rings 17.

[0024] The inner wall of the guide sleeve 7 is also equipped with a dustproof ring 18.

[0025] Ribs 14 are arranged radially along the cylinder body 1. Ribs 14 include a first rib 141, a second rib 142 and a third rib 143. The included angle between the second rib 142 and the third rib 143 along the axis of the cylinder body 1 is 90°. The included angle between the first rib 141 and the second rib 142 and the third rib 143 along the axis of the cylinder body 1 is 135°.

[0026] The first rib 141 is provided with a mounting base 19. Both the first rib 141 and the mounting base 19 are provided with mounting holes 20, and screws are screwed into the mounting holes 20.

[0027] A pin hole 21 is provided at the end of the piston rod 3.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A rocker arm lifting cylinder, comprising a cylinder body (1), wherein a cavity (2) is provided inside the cylinder body (1), a piston rod (3) is provided inside the cavity (2), a piston (4) is provided at the bottom of the piston rod (3), the piston (4) and the piston rod (3) are installed by a first screw (5), and a piston seal (6) is provided on the outer wall of the piston (4), characterized in that: The cylinder body (1) is also provided with a guide sleeve (7) at its end. A first positioning groove (8) is provided on the guide sleeve (7). A second positioning groove (9) is provided on the inner wall of the cylinder body (1). A first positioning block (10) is provided in the first positioning groove (8). The first positioning block (10) is connected to the guide sleeve (7) by a second screw (11). A third positioning groove (12) is provided on the first positioning block (10). A second positioning block (13) is connected between the second positioning groove (9) and the third positioning groove (12). A number of ribs (14) are provided on the outer wall of the cylinder body (1).

2. The rocker arm lifting cylinder according to claim 1, characterized in that: A first sealing ring (15) is provided between the piston (4) and the piston rod (3), and a second sealing ring (16) is provided between the guide sleeve (7) and the inner wall of the cylinder (1).

3. The rocker arm lifting cylinder according to claim 2, characterized in that: The inner wall of the guide sleeve (7) is provided with several guide rings (17).

4. The rocker arm lifting cylinder according to claim 3, characterized in that: The inner wall of the guide sleeve (7) is also provided with a dustproof ring (18).

5. The rocker arm lifting cylinder according to claim 4, characterized in that: The ribs (14) are arranged radially along the cylinder body (1). The ribs (14) include a first rib (141), a second rib (142) and a third rib (143). The angle between the second rib (142) and the third rib (143) along the axis of the cylinder body (1) is 90°. The angle between the first rib (141) and the second rib (142) and the third rib (143) along the axis of the cylinder body (1) is 135°.

6. The rocker arm lifting cylinder according to claim 5, characterized in that: The first rib (141) is provided with a mounting seat (19), and both the first rib (141) and the mounting seat (19) are provided with mounting holes (20), and screws are screwed into the mounting holes (20).

7. The rocker arm lifting cylinder according to claim 6, characterized in that: The piston rod (3) has a pin hole (21) at its end.

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