An annular hydraulic cylinder

Abstract

The present invention discloses an annular hydraulic cylinder, comprising a hydraulic cylinder body, a hydraulic drive block fixedly connected therein, a circular sealing groove formed on the upper end surface of the hydraulic drive block, an oil chamber formed on the bottom surface of the sealing groove, a partition fixedly connected therein, an oil inlet and an oil return port formed on either side of the partition, a piston block movably connected therein, a sealing plate fixedly connected to the upper end of the piston block, a movable plate fixedly connected to the upper end surface of the sealing plate, the movable plate fixedly connected to the bottom of a connecting bearing, a threaded pipe fixedly connected to the inner side of the connecting bearing, a push rod threadedly connected to the inner side of the threaded pipe, the hydraulic cylinder body fixedly connected to a cylinder head, a through hole formed in the middle of the cylinder head, and the push rod passing through the through hole and out of the hydraulic cylinder body. The present invention has the advantages of stable operation and convenient use, and is mainly used in machinery manufacturing.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical manufacturing, in particular to an annular hydraulic cylinder. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, producing linear reciprocating (or oscillating) motion. It features a simple structure and reliable operation. Using it to achieve reciprocating motion eliminates the need for a reduction gear, eliminates transmission backlash, and provides smooth motion. Therefore, it is widely used in the hydraulic systems of various machines.

[0003] In the prior art, a hydraulic cylinder is usually composed of a cylinder barrel and a piston rod. High-pressure hydraulic oil flows into the cylinder barrel, and the pressure inside the cylinder barrel increases, thereby pushing up the piston rod. However, the existing hydraulic rod will leak oil after being used for a long time, thereby affecting the stability of the hydraulic cylinder. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention aims to provide an annular hydraulic cylinder with stable operation.

[0005] and a control panel that is located adjacent to the hydraulic cylinder to which the handle is attached. The cam is fixedly provided with a toothed plate, and the toothed plate is fixedly provided with a toothed plate, and the toothed plate is fixedly provided with a toothed plate, and the toothed plate is fixedly provided with a toothed plate, and the toothed plate is fixedly provided with a toothed plate, and the toothed plate is fixedly provided with a toothed plate,

[0006] A plurality of sealing strips are embedded and connected on the contact surface between the sealing plate and the sealing groove, and a sealing strip is embedded and connected on the contact surface between the upper end of the partition plate and the sealing plate.

[0007] A plurality of rubber seals are embedded and connected on the contact surface between the piston block and the oil chamber, and the rubber seals are arranged along the longitudinal section of the oil chamber.

[0008] A flange is welded to the outer side surface of the upper end of the hydraulic cylinder body, and screw holes are provided on the outer edge of the cylinder cover opposite to the flange, and screws are threadedly connected to the inner surface of the screw holes.

[0009] The upper end surface of the push rod is engaged with a rotating bearing, the inner side of the rotating bearing is fixedly connected with a connecting rod, and the upper end of the connecting rod is fixedly connected with a push block.

[0010] A plane bearing is fixedly connected between the movable plate and the mounting plate.

[0011] The plane bearing includes a shaft seat, a shaft ring, balls, and a ball protection frame. The shaft seat is fixedly connected to the upper end surface of the movable plate, and the shaft ring is fixedly connected to the lower end surface of the mounting plate. The shaft seat and the shaft ring are arranged opposite to each other and a ball groove is opened on the opposite surface. A plurality of balls are slidably connected in the ball groove, and the plurality of balls are fixedly connected in the ball protection frame.

[0012] A limiting groove is provided on the outer side wall of the guide rod, and a limiting block is fixedly connected to the inner side wall of the guide hole. The limiting block is slidably connected in the limiting groove.

[0013] The beneficial effects of the present invention are as follows: the device is moved through the piston block by the internal pressure of the liquid oil. The oil entering the oil inlet pushes the piston block to move in one direction, and the oil entering the oil return port pushes the piston block to move in the opposite direction, thereby driving the forward and reverse rotation of the threaded tube. The forward and reverse rotation of the threaded tube drives the push rod to move up and down. Since the up and down movement of the push rod is achieved by the rotation of the thread, it has the advantage of stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention;

[0015] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the A1 part.

[0016] In the figure: 1 hydraulic cylinder body, 2 support sleeve, 3 hydraulic drive block, 4 oil chamber, 5 partition, 6 oil inlet, 7 oil return port, 8 piston block, 9 sealing plate, 10 movable plate, 11 connecting bearing, 12 mounting plate, 13 threaded pipe, 14 push rod, 15 fixed block, 16 cylinder head, 17 guide rod, 18 guide hole, 19 shaft seat, 20 shaft ring, 21 ball, 22 limit groove, 23 limit block. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0018] Example 1

[0019] See also Figure 1-2, an annular hydraulic cylinder includes a hydraulic cylinder body 1, the hydraulic cylinder body 1 is a barrel-shaped structure, the hydraulic cylinder body 1 is fixedly connected to a support sleeve 2, the bottom of the support sleeve 2 is fixedly connected to the bottom of the inner cavity of the hydraulic cylinder body 1, the outer side of the support sleeve 2 is in contact with the inner side of the inner cavity of the hydraulic cylinder body 1, and the upper end face of the support sleeve 2 is fixedly connected to a hydraulic drive block 3. The hydraulic drive block 3 is a circular ring structure, and its outer diameter and inner diameter are the same as the outer diameter and inner diameter of the support sleeve 2. A circular ring-shaped sealing groove is provided on the upper end surface of the hydraulic drive block 3, and an oil chamber 4 is provided on the bottom surface of the groove of the sealing groove. A partition plate 5 is fixedly connected in the oil chamber 4, and an oil inlet 6 and an oil return port 7 are respectively provided on both sides of the partition plate 5. The oil inlet 6 and the oil return port 7 are evenly arranged on the outer side of the hydraulic cylinder body 1, and a piston block 8 is movably connected in the oil chamber 4. The upper end of the piston block 8 is fixedly connected to a sealing plate 9, and the sealing plate 9 is movably connected to the sealing groove Inside, the upper end face of the sealing plate 9 is fixedly connected with a movable plate 10, which is fixedly connected to the bottom of the connecting bearing 11. The upper end of the connecting bearing 11 is fixedly connected with a mounting plate 12. The outer edge of the mounting plate 12 is fixedly connected to the inner side wall of the inner cavity of the hydraulic cylinder body 1. The inner side of the connecting bearing 11 is fixedly connected with a threaded tube 13. The inner thread of the threaded tube 13 is connected with a push rod 14. The upper end of the mounting plate 12 is fixedly connected with a fixing block 15. The fixing block 15 has a circular structure and the outer side surface is in contact with the inner side surface of the hydraulic cylinder cavity. The upper end surface of the fixing block 15 is fixedly connected with a cylinder cover 16. The lower bottom surface of the cylinder cover 16 is also fixedly connected to the upper end face of the hydraulic cylinder body 1. A through hole is provided in the middle of the cylinder cover 16. The push rod 14 passes through the through hole to pass through the hydraulic cylinder body 1. The center of the bottom of the inner cavity of the hydraulic cylinder body 1 is fixedly connected with a guide rod 17. A guide hole 18 is provided at the bottom of the push rod 14. The guide rod 17 is slidably connected to the inside of the guide hole 18.

[0020] Example 2

[0021] In the present invention, a plurality of sealing strips are engaged and connected on the contact surface between the sealing plate 9 and the sealing groove, and a sealing strip is engaged and connected on the contact surface between the upper end of the partition plate 5 and the sealing plate 9 .

[0022] A plurality of rubber seals are engaged and connected on the contact surface between the piston block 8 and the oil chamber 4 , and the rubber seals are arranged along the longitudinal section of the oil chamber 4 .

[0023] A flange is welded to the outer side surface of the upper end of the hydraulic cylinder body 1 , and screw holes are provided on the outer edge of the cylinder cover 16 opposite to the flange, and screws are threadedly connected to the inner surface of the screw holes.

[0024] The upper end surface of the push rod 14 is engaged with a rotating bearing, the inner side of the rotating bearing is fixedly connected to a connecting rod, and the upper end of the connecting rod is fixedly connected to a push block.

[0025] A plane bearing is fixedly connected between the movable plate 10 and the mounting plate 12 .

[0026] The plane bearing includes a shaft seat 19, a shaft ring 20, a ball 21, and a ball protection frame. The shaft seat 19 is fixedly connected to the upper end surface of the movable plate 10, and the shaft ring 20 is fixedly connected to the lower end surface of the mounting plate 12. The shaft seat 19 and the shaft ring 20 are arranged opposite to each other and a ball 21 groove is opened on the opposite surface. A plurality of balls 21 are slidably connected in the ball 21 groove, and the plurality of balls 21 are fixedly connected in the ball protection frame.

[0027] A limiting groove 22 is provided on the outer wall of the guide rod 17 , and a limiting block 23 is fixedly connected to the inner wall of the guide hole 18 . The limiting block 23 is slidably connected in the limiting groove 22 .

[0028] Example 3

[0029] The working principle of the present invention is: when in use, the liquid oil is injected from the oil inlet 6 and drawn out from the oil return port 7 through the hydraulic pump, thereby pushing the piston block 8 to slide in the oil chamber 4 through the hydraulic pressure, and the piston block 8 drives the sealing plate 9 to rotate in the sealing groove, thereby driving the movable plate 10 to rotate, and the movable plate 10 is fixedly connected to the inner shaft of the connecting bearing 11, thereby driving the inner shaft of the connecting bearing 11 to rotate, and the inner shaft of the connecting bearing 11 drives the threaded tube 13 to rotate, and the threaded tube 13 is rotated to make the push rod 14 move up and down, thereby realizing the upward and downward movement of the push rod 14.

[0030] Example 4

[0031] This device is activated by the internal pressure of the liquid oil through the piston block 8. The oil entering the oil inlet 6 pushes the piston block 8 to move in one direction, and the oil entering the oil return port 7 pushes the piston block 8 to move in the opposite direction, thereby driving the forward and reverse rotation of the threaded tube 13. The forward and reverse rotation of the threaded tube 13 drives the push rod 14 to move up and down. Since the up and down movement of the push rod 14 is achieved by the rotation of the thread, it has the advantage of stable operation.

[0032] Example 5

[0033] In the present invention, the connecting bearing 11 includes an inner shaft and an outer shaft. The bottom of the inner shaft is fixedly connected to the movable plate 10, and the top of the outer shaft is fixedly connected to the mounting plate 12. When the movable plate 10 rotates, it drives the inner shaft to rotate, while the outer shaft is fixed to the mounting plate 12 and its position cannot be changed. Therefore, the threaded tube 13 drives the top rod 14 to move up and down through the rotation of the inner shaft.

[0034] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0035] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An annular hydraulic cylinder, comprising a hydraulic cylinder body (1), characterized in that: The hydraulic cylinder body (1) is a barrel-shaped structure. A support sleeve (2) is fixedly connected to the inside of the hydraulic cylinder body (1) for supporting and fixing the hydraulic drive block (3). The bottom of the support sleeve (2) is fixedly connected to the bottom of the inner cavity of the hydraulic cylinder body (1). The outer side surface of the support sleeve (2) fits the inner side surface of the inner cavity of the hydraulic cylinder body (1). The upper end surface of the support sleeve (2) is fixedly connected to the hydraulic drive block (3). The hydraulic drive block (3) is an annular structure, and its outer diameter and inner diameter are the same as the outer diameter and inner diameter of the support sleeve (2). The upper end surface of the hydraulic drive block (3) is provided with an annular sealing groove. An oil chamber (4) is provided on the bottom surface of the groove of the sealing groove for sealing the oil chamber (4). A partition (5) is fixedly connected in the oil chamber (4). An oil inlet (6) and an oil return port (7) are respectively provided on both sides of the partition (5). The oil inlet (6) and the oil return port (7) are evenly arranged on the outer side of the hydraulic cylinder body (1). A piston block (8) is movably connected in the oil chamber (4). The piston block (8) is pushed to move in the oil chamber (4) by the internal oil pressure of the oil inlet (6) and the oil return port (7). A sealing plate (9) is fixedly connected to the upper end of the piston block (8). The sealing plate (9) is movably connected in the sealing groove for The sealing oil chamber (4) ensures that the oil pressure pushes the piston block (8), the upper end surface of the sealing plate (9) is fixedly connected to a movable plate (10), the movable plate (10) is fixedly connected to the bottom of the connecting bearing (11), the upper end of the connecting bearing (11) is fixedly connected to a mounting plate (12), the outer edge of the mounting plate (12) is fixedly connected to the inner wall of the inner cavity of the hydraulic cylinder (1), the inner side of the connecting bearing (11) is fixedly connected to a threaded pipe (13), the inner thread of the threaded pipe (13) is connected to a push rod (14), which is used to drive the push rod (14) to move up and down, and the upper end of the mounting plate (12) is fixedly connected to a fixed block (1 5), the fixed block (15) is annular in structure and the outer side surface is in contact with the inner side surface of the hydraulic cylinder cavity, the upper end surface of the fixed block (15) is fixedly connected to the cylinder cover (16), the lower bottom surface of the cylinder cover (16) is also fixedly connected to the upper end surface of the hydraulic cylinder body (1) for sealing the hydraulic cylinder body (1), a through hole is provided in the middle of the cylinder cover (16), the push rod (14) passes through the hydraulic cylinder body (1) through the through hole, the center of the bottom of the inner cavity of the hydraulic cylinder body (1) is fixedly connected to a guide rod (17), the bottom of the push rod (14) is provided with a guide hole (18), and the guide rod (17) is slidably connected inside the guide hole (18).

2. The annular hydraulic cylinder according to claim 1, characterized in that: A plurality of sealing strips are embedded and connected on the contact surface between the sealing plate (9) and the sealing groove, and a sealing strip is embedded and connected on the contact surface between the upper end of the partition plate (5) and the sealing plate (9), for enhancing the sealing performance inside the oil chamber (4).

3. The annular hydraulic cylinder according to claim 1, characterized in that: A plurality of rubber seals are engaged and connected on the contact surface between the piston block (8) and the oil chamber (4). The rubber seals are arranged along the longitudinal section of the oil chamber (4) and are used to enhance the sealing performance of the piston block (8) and prevent oil from entering the other end from one end of the piston block (8).

4. The annular hydraulic cylinder according to claim 1, characterized in that: A flange is welded to the outer side surface of the upper end of the hydraulic cylinder body (1), and screw holes are provided on the outer edge of the cylinder cover (16) opposite to the flange, with screws being threadedly connected to the inner threads of the screw holes for fixing the cylinder cover (16).

5. The annular hydraulic cylinder according to claim 1, characterized in that: The upper end surface of the push rod (14) is engaged with a rotary bearing, the inner side of the rotary bearing is fixedly connected to a connecting rod, and the upper end of the connecting rod is fixedly connected to a push block.

6. The annular hydraulic cylinder according to claim 1, characterized in that: A plane bearing is fixedly connected between the movable plate (10) and the mounting plate (12).

7. The annular hydraulic cylinder according to claim 6, characterized in that: The plane bearing includes a shaft seat (19), a shaft ring (20), a ball (21), and a ball protection frame, wherein the shaft seat (19) is fixedly connected to the upper end surface of the movable plate (10), and the shaft ring (20) is fixedly connected to the lower end surface of the mounting plate (12). The shaft seat (19) and the shaft ring (20) are arranged opposite to each other and a ball (21) groove is provided on the opposite surface. A plurality of balls (21) are slidably connected in the ball (21) groove. The plurality of balls (21) are fixedly connected in the ball protection frame and are used to increase the downward pressure on the movable plate (10), thereby strengthening the contact connection between the sealing plate (9) and the sealing groove, and enhancing the sealing inside the oil chamber (4).

8. The annular hydraulic cylinder according to claim 1, characterized in that: A limiting groove (22) is provided on the outer wall of the guide rod (17), and a limiting block (23) is fixedly connected to the inner wall of the guide hole (18). The limiting block (23) is slidably connected in the limiting groove (22) to prevent the push rod (14) from rotating following the threaded tube (13), thereby ensuring that the threaded tube (13) can drive the push rod (14) to move.

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