High-stability hydraulic oil cylinder

Abstract

The utility model discloses a high-stability hydraulic oil cylinder, and belongs to the field of hydraulic oil cylinders, the high-stability hydraulic oil cylinder comprises a cylinder body, the top of the cylinder body is fixedly connected with a connecting ring, the top of the connecting ring is fixedly provided with a butt joint ring through a bolt, the inner wall of the butt joint ring is slidably connected with a piston rod, and the bottom of the piston rod is fixedly connected with a connecting rod; a piston sleeve and a rubber buffer pad are fixedly assembled on the outer edge of the connecting rod, a first rotating ring is fixedly assembled on the top of the piston rod, an end cover is fixedly assembled at the bottom of the cylinder body, and an oil inlet hole is formed in the inner wall of the end cover; the connecting disc is connected with an installation object through cooperation of the through holes and bolts, then rotation is conducted through the ball bearings, the smoothness of the device during rotation can be guaranteed, compared with traditional rotating connection, the stability and the smoothness are higher, abnormal sound is not prone to being generated during rotation, and the service life of the device is prolonged. And meanwhile, a rod body for mounting an object can be directly inserted into the circular hole and the inner wall position of the ball bearing, so that the practicability of the device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulic cylinders, and in particular to a hydraulic cylinder with high stability. Background Art

[0002] Hydraulic cylinders are widely used in engineering machinery. They are the actuators in hydraulic transmission systems. Their function is to convert hydraulic energy into mechanical energy. The input of hydraulic cylinders is the flow rate and pressure of the fluid, and the output is the linear motion speed and force. They have a simple structure and reliable operation. When using them to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the movement is smooth.

[0003] In the patent with the published authorization announcement number CN214742441U, the hydraulic cylinder comprises a cylinder barrel, a piston rod is movably installed inside the cylinder barrel, one end of the piston rod is fixedly connected to a fixed ring platform, the fixed ring platform comprises a first ring platform, a second ring platform and an arc rod, the arc rod is arranged between the first ring platform and the second ring platform and is fixedly connected, a positioning groove is opened on the surface of the arc rod, a piston is clamped on the surface of the arc rod, a positioning convex ridge is fixedly connected to the inner wall of the piston, a guide sleeve is fixedly installed at one end inside the cylinder barrel, a sealing ring is fixedly installed inside the guide sleeve, a positioning block is fixedly installed between the cylinder barrel and the guide sleeve, a dust ring is fixedly installed at one end inside the guide sleeve, and a metal ceramic coating is fixedly connected to the inner wall of the guide sleeve. The utility model has a simple structure and a novel design, can effectively improve the stability of the hydraulic cylinder, and effectively prevent dust and other particles from entering the circular barrel plug, thereby effectively extending the service life.

[0004] When the above device is implemented, it is not convenient to rotate and connect with the connected object. Since the device may be in a tilted state after actual installation and operation, it will need to be rotated and connected between the installed objects. The inability to easily rotate and connect will result in insufficient stability and smoothness during rotation, resulting in abnormal noise and greater friction. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides a high-stability hydraulic cylinder, which overcomes the deficiencies of the prior art and aims to solve the problems in the background technology.

[0006] In order to achieve the above-mentioned objectives, the present application adopts the following technical scheme: a high-stability hydraulic cylinder, comprising a cylinder body, a connecting ring fixedly connected to the top of the cylinder body, a docking ring fixedly installed on the top of the connecting ring by bolts, a piston rod slidably connected to the inner wall of the docking ring, a connecting rod fixedly connected to the bottom of the piston rod, a piston sleeve and a rubber buffer pad fixedly installed on the outer edge of the connecting rod, a rotating ring 1 fixedly installed on the top of the piston rod, an end cover fixedly installed on the bottom of the cylinder body, an oil inlet hole provided on the inner wall of the end cover, a rotating ring 2 fixedly installed on the bottom of the end cover, ball bearings fixedly installed on the inner walls of the rotating ring 2 and the rotating ring 1, the inner ring of the ball bearing fixedly connected to a connecting disk, and a through hole provided on the inner wall of the connecting disk.

[0007] As a preferred embodiment, a lubrication hole 1 is opened on the outer side of the docking ring, the lubrication hole 1 is communicated with the inner cavity of the cylinder body, and a one-way valve is fixedly mounted on the inner wall of the lubrication hole 1.

[0008] By adopting the above technical solution, the lubricating oil can be injected into the inner cavity of the cylinder through the lubrication hole 1, and then contact the moving piston sleeve and rubber buffer pad to ensure its smoothness during movement, and the one-way valve is used to ensure that it will not flow back.

[0009] As a preferred embodiment, the rubber buffer pad is arranged above the piston sleeve, the outer diameters of the piston sleeve and the rubber buffer pad are matched with the inner wall diameter of the cylinder body, and the piston sleeve and the rubber buffer pad are slidably connected to the inner wall position of the cylinder body.

[0010] By adopting the above technical solution, when the hydraulic oil is pressed into the cylinder body, pressure will be generated. This pressure acts on the piston sleeve, thereby pushing the piston rod to move in a straight line. When the piston rod runs to the extreme position, the rubber buffer pad will collide with the inner wall of the connecting ring, thereby reducing the impact force and noise.

[0011] As a preferred implementation, a lubrication hole 2 is opened on the inner wall of the rotating ring 2, and a one-way valve is fixedly installed on the inner wall of the oil inlet hole and the lubrication hole 2.

[0012] By adopting the above technical solution, the lubricating oil can be injected into the inner cavity of the rotating ring 2 through the lubrication hole 2 to lubricate the ball bearing, thereby ensuring the smoothness of the balls and inner rings in the inner cavity of the ball bearing during rotation. The one-way valve can ensure that the lubricating oil and the hydraulic oil injected into the inner cavity of the oil inlet hole will not flow back, thereby ensuring the sealing performance.

[0013] As a preferred embodiment, connecting plates are fixedly mounted on both sides of the two ball bearings, and a circular hole is opened inside the connecting plate, and the diameter of the circular hole corresponds to the position of the inner ring of the ball bearing and the shape is adapted thereto.

[0014] By adopting the above technical solution, the two connecting plates can be connected to the installation object, and then the connecting plates drive the ball bearings to rotate to ensure the smoothness of the device during rotation. Compared with traditional rotating connections, the stability and smoothness are higher, and it is not easy to produce abnormal noise during rotation.

[0015] As a preferred embodiment, the outer diameter of the piston rod is matched with the inner wall diameter of the docking ring, the top of the docking ring is sharp, the number of the bolts is several, and the several bolts are distributed in a ring shape on the inner wall of the connecting ring and the docking ring.

[0016] By adopting the above technical solution, it is ensured that the piston rod will not interfere with each other when sliding on the inner wall of the docking ring, ensuring that it can move stably, and the connecting ring and the docking ring can be stably connected by using a plurality of bolts to ensure that they will not be easily detached.

[0017] Beneficial effects of this application:

[0018] 1. This high-stability hydraulic cylinder connects the connecting plate to the installation object through the through-hole matching bolts, and then rotates using the ball bearing, which can ensure the smoothness of the device during rotation. Compared with the traditional rotating connection, it has higher stability and smoothness, and is not prone to abnormal noise during rotation. At the same time, the rod body of the installation object can be directly inserted into the inner wall position of the round hole and the ball bearing, which improves the practicality of the device.

[0019] 2. This kind of high-stability hydraulic cylinder generates pressure when the hydraulic oil is pressed into the cylinder body through the oil inlet hole. This pressure acts on the piston sleeve, thereby pushing the piston rod to move in a straight line. When the piston rod runs to the limit position, the rubber buffer pad will collide with the inner wall of the connecting ring, thereby reducing the impact force and noise. At the same time, the lubrication hole 2 can be used to inject lubricating oil into the inner cavity of the rotating ring 2 to lubricate the ball bearing, thereby ensuring the smoothness of the balls and inner rings in the inner cavity of the ball bearing during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of this application;

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of this application;

[0022] Figure 3 This is a schematic diagram of the expanded structure of this application;

[0023] Figure 4 This is a schematic diagram of the ball bearing structure of the present application.

[0024] Numbers in the figure: 1. Cylinder body; 2. Connecting ring; 3. Docking ring; 4. Bolt; 5. Lubrication hole 1; 6. Piston rod; 7. Connecting rod; 8. Piston sleeve; 9. Rubber buffer pad; 10. Rotating ring 1; 11. End cover; 12. Oil inlet hole; 13. Rotating ring 2; 14. Lubrication hole 2; 15. Ball bearing; 16. Connecting plate; 17. Through hole. DETAILED DESCRIPTION

[0025] The following will provide a clear and complete description of the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0026] Reference Figure 1-4 A high-stability hydraulic cylinder comprises a cylinder body 1, a connecting ring 2 is fixedly connected to the top of the cylinder body 1, a docking ring 3 is fixedly installed on the top of the connecting ring 2 by bolts 4, a piston rod 6 is slidably connected to the inner wall of the docking ring 3, a connecting rod 7 is fixedly connected to the bottom of the piston rod 6, a piston sleeve 8 and a rubber buffer pad 9 are fixedly assembled on the outer edge of the connecting rod 7, a rotating ring 10 is fixedly assembled on the top of the piston rod 6, an end cover 11 is fixedly assembled on the bottom of the cylinder body 1, an oil inlet hole 12 is opened on the inner wall of the end cover 11, a rotating ring 2 13 is fixedly assembled on the bottom of the end cover 11, ball bearings 15 are fixedly installed on the inner walls of the rotating ring 2 13 and the rotating ring 10, the inner ring of the ball bearing 15 is fixedly connected to a connecting disk 16, and a through hole 17 is opened on the inner wall of the connecting disk 16.

[0027] See also Figure 1 and Figure 3 A lubrication hole 5 is provided on the outer side of the docking ring 3, and the lubrication hole 5 is communicated with the inner cavity of the cylinder body 1. A one-way valve is fixedly installed on the inner wall of the lubrication hole 5, so that the lubricating oil can be injected into the inner cavity of the cylinder body 1 through the lubrication hole 5, and then contact the moving piston sleeve 8 and the rubber buffer pad 9 to ensure its smoothness during movement, and the one-way valve is used to ensure that it will not flow back.

[0028] See also Figure 2 and Figure 3 The rubber buffer pad 9 is arranged above the piston sleeve 8. The outer diameters of the piston sleeve 8 and the rubber buffer pad 9 are adapted to the inner wall diameter of the cylinder body 1. The piston sleeve 8 and the rubber buffer pad 9 are slidably connected to the inner wall of the cylinder body 1, so that when the hydraulic oil is pressed into the cylinder body 1, pressure is generated. This pressure acts on the piston sleeve 8, thereby pushing the piston rod 6 to move in a straight line. When the piston rod 6 runs to the limit position, the rubber buffer pad 9 collides with the inner wall of the connecting ring 2, thereby reducing the impact force and noise.

[0029] See also Figure 3 and Figure 4A lubrication hole 14 is provided on the inner wall of the rotating ring 13, and a one-way valve is fixedly installed on the inner walls of the oil inlet hole 12 and the lubrication hole 14, so that the lubrication hole 14 can be used to inject lubricating oil into the inner cavity of the rotating ring 13 to lubricate the ball bearing 15, thereby ensuring the smoothness of the balls and inner rings in the inner cavity of the ball bearing 15 during rotation, and the one-way valve can ensure that the lubricating oil and the hydraulic oil injected into the inner cavity of the oil inlet hole 12 will not flow back, thereby ensuring the sealing performance.

[0030] See also Figure 4 , connecting plates 16 are fixedly assembled on both sides of the two ball bearings 15, and a circular hole is opened inside the connecting plate 16, and the aperture of the circular hole corresponds to the position of the inner ring of the ball bearing 15 and the shape is suitable, so that the two connecting plates 16 can be connected to the installation object, and then the connecting plates 16 drive the ball bearings 15 to rotate to ensure the smoothness of the device during rotation. Compared with traditional rotating connections, the stability and smoothness are higher, and it is not easy to produce abnormal noise during rotation.

[0031] See also Figure 2 and Figure 3 The outer diameter of the piston rod 6 is matched with the inner wall diameter of the docking ring 3, the top of the docking ring 3 is sharp, the number of bolts 4 is several, and the several bolts 4 are distributed in a ring shape on the inner wall positions of the connecting ring 2 and the docking ring 3, so that it can be ensured that the piston rod 6 will not interfere with each other when sliding on the inner wall position of the docking ring 3, ensuring that it can move stably, and the connecting ring 2 and the docking ring 3 can be stably connected by using several bolts 4 to ensure that they will not be easily detached.

[0032] Working principle: When using the device, first, when the hydraulic oil is pressed into the cylinder body 1 through the oil inlet hole 12, pressure will be generated. This pressure acts on the piston sleeve 8, thereby pushing the piston rod 6 to make a linear motion. When the piston rod 6 runs to the limit position, the rubber buffer pad 9 will collide with the inner wall of the connecting ring 2, thereby reducing the impact force and noise. When the device needs to be installed, first, the connecting plate 16 can be connected to the installation object through the through hole 17 and the bolt 4, and then the ball bearing 15 is used for rotation, which can ensure the smoothness of the device during rotation. Compared with the traditional rotating connection, the stability and smoothness are higher, and it is not easy to produce abnormal noise during rotation. At the same time, the rod body of the installation object can be directly inserted into the round hole and the inner wall position of the ball bearing 15, which improves the practicality of the device.

[0033] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and utility model concept of the present application, which should be covered by the protection scope of the present application.

Claims

1. A high-stability hydraulic cylinder, comprising a cylinder body (1), characterized in that: The top of the cylinder body (1) is fixedly connected to a connecting ring (2), the top of the connecting ring (2) is fixedly mounted with a docking ring (3) via bolts (4), the inner wall of the docking ring (3) is slidably connected to a piston rod (6), the bottom of the piston rod (6) is fixedly connected to a connecting rod (7), the outer edge of the connecting rod (7) is fixedly mounted with a piston sleeve (8) and a rubber buffer pad (9), the top of the piston rod (6) is fixedly mounted with a rotating ring 1 (10), the bottom of the cylinder body (1) is fixedly mounted with an end cover (11), the inner wall of the end cover (11) is provided with an oil inlet hole (12), the bottom of the end cover (11) is fixedly mounted with a rotating ring 2 (13), the inner walls of the rotating ring 2 (13) and the rotating ring 1 (10) are both fixedly mounted with ball bearings (15), the inner ring of the ball bearing (15) is fixedly connected to a connecting disk (16), the inner wall of the connecting disk (16) is provided with a through hole (17).

2. A high-stability hydraulic cylinder according to claim 1, characterized in that: A lubrication hole (5) is provided on the outer side of the docking ring (3), the lubrication hole (5) being in communication with the inner cavity of the cylinder body (1), and a one-way valve is fixedly mounted on the inner wall of the lubrication hole (5).

3. A high-stability hydraulic cylinder according to claim 1, characterized in that: The rubber buffer pad (9) is arranged above the piston sleeve (8); the outer diameters of the piston sleeve (8) and the rubber buffer pad (9) are both matched to the inner wall diameter of the cylinder body (1); and the piston sleeve (8) and the rubber buffer pad (9) are slidably connected to the inner wall of the cylinder body (1).

4. A high-stability hydraulic cylinder according to claim 1, characterized in that: The inner wall of the second rotating ring (13) is provided with a second lubrication hole (14), and the inner walls of the oil inlet hole (12) and the second lubrication hole (14) are fixedly mounted with a one-way valve.

5. A high-stability hydraulic cylinder according to claim 1, characterized in that: A connecting plate (16) is fixedly mounted on both sides of the two ball bearings (15), and a circular hole is provided inside the connecting plate (16), and the diameter of the circular hole corresponds to the position of the inner ring of the ball bearing (15) and the shape is adapted thereto.

6. A high-stability hydraulic cylinder according to claim 1, characterized in that: The outer diameter of the piston rod (6) is matched to the inner wall diameter of the docking ring (3); the top of the docking ring (3) is sharp; the number of the bolts (4) is several, and the several bolts (4) are distributed in a ring shape on the inner wall positions of the connecting ring (2) and the docking ring (3).

Images