Double-piston hydraulic cylinder

Abstract

The utility model discloses a double-piston hydraulic cylinder, which belongs to the technical field of hydraulic oil cylinders and comprises a cylinder body, a piston rod is arranged in the cylinder body, a right piston is arranged on the right side of the outer side wall of the piston rod, a left piston is arranged on the left side of the outer side wall of the piston rod, and a gland is fixedly connected to the left side of the left piston. An oil inlet is integrally formed in the right side of the upper surface of the cylinder body; through a positioning circular ring, an extrusion cavity, an insertion ring, an insertion groove and a related control structure, a unique connection mode between the left piston and the cylinder body is achieved, when the left piston needs to be disassembled, a pull plate is pulled, a sliding plate is driven by a connecting rod to overcome the elastic force of a first spring to move, an inclined plate is disengaged from a clamping groove of the insertion ring, and the left piston is disassembled. In this way, the left piston can be easily pulled out of the positioning circular ring, a user can conveniently replace or maintain the internal piston, and the maintenance difficulty and time cost are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a double-piston 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] The existing double-piston hydraulic cylinder has a high friction coefficient and poor lubrication effect, which easily causes serious wear of the piston and cylinder body and requires frequent replacement. At the same time, the existing double-piston hydraulic cylinder is inconvenient to disassemble and replace the piston inside it, which is time-consuming and labor-intensive, thereby reducing work efficiency. Utility Model Content

[0004] Purpose of the utility model: The purpose of the utility model is to provide a solution to the problem that the existing double-piston hydraulic cylinder is inconvenient for the later maintenance of the internal piston.

[0005] Technical solution: A double-piston hydraulic cylinder includes a cylinder body, a piston rod is provided inside the cylinder body, a right piston is provided on the right side of the outer wall of the piston rod, a left piston is provided on the left side of the outer wall of the piston rod, a pressure cover is fixedly connected to the left side of the left piston, an oil inlet is integrally formed on the right side of the upper surface of the cylinder body, and an exhaust port is integrally formed on the left side of the upper surface of the cylinder body.

[0006] The lockhole that is formed on the upper part of the two said outer walls is formed on the upper part of the second rim of the second rim of the second rim is fixed with a lock hole, and the lockhole that is formed on the lower part of the second rim of the second rim is fixed with a lock hole.

[0007] Furthermore, a mounting plate is fixedly connected to the right end of the cylinder body, and a through-type mounting circular hole is opened on the upper surface of the mounting plate.

[0008] Furthermore, the left end of the piston rod extends to the left side of the cylinder body and is fixedly connected to a U-shaped connecting piece, and penetrating bolt holes are provided above and below the inner side wall of the U-shaped connecting piece.

[0009] Furthermore, the outer side wall of the right piston is provided with two U-shaped sealing rings, the outer side wall of the left piston is provided with multiple O-rings, and the inner side wall of the left piston is provided with a U-shaped ring.

[0010] Furthermore, an airbag is fixedly connected to the inner wall of the cylinder body and located on the outside of the pressure cover, an annular piston plate is slidably connected to the inside of the extrusion chamber and located to the right of the two oblique plates, an air delivery groove is opened between the inside of the extrusion chamber and the airbag, and a plurality of springs are fixedly connected to the left side of the annular piston plate and the left side of the inside of the extrusion chamber.

[0011] Furthermore, a groove is provided on the outer side wall of the piston rod and located on the right side of the right piston, a key is fixedly connected to the inside of the groove, and a shaft baffle is fixedly connected to the outer side wall of the key.

[0012] Beneficial effects:

[0013] The positioning ring, extrusion chamber, plug-in ring, plug-in groove and related control structure realize a unique connection between the left piston and the cylinder body. When the left piston needs to be removed, the pull plate is pulled, and the sliding plate is driven by the connecting rod to overcome the elastic force of the spring 1 and move, so that the oblique plate is disengaged from the slot of the plug-in ring. In this way, the left piston can be easily extracted from the positioning ring, which is convenient for users to replace or repair the internal piston, greatly reducing the difficulty and time cost of maintenance.

[0014] The airbag on the inner wall of the cylinder is connected to the extrusion chamber through an air delivery groove. When pressure shock or vibration occurs during the operation of the hydraulic cylinder, the movement of the annular piston plate in the extrusion chamber can adjust the gas pressure in the airbag, play a buffering and protective role, and extend the service life of the hydraulic cylinder. At the same time, spring 2 can assist the annular piston plate in resetting to ensure the repeatability of the buffering function. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the overall front cross-sectional structure of the utility model;

[0017] Figure 3 This utility model Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0018] Figure 4 This utility model Figure 2Schematic diagram of the enlarged structure at point B in the middle.

[0019] In the figure: 1. Cylinder body; 2. Piston rod; 3. Right piston; 4. Left piston; 5. Gland; 6. Oil inlet; 7. Positioning ring; 8. Extrusion chamber; 9. Plug ring; 10. Plug slot; 11. Control box; 12. Sliding plate; 13. Oblique plate; 14. Slot; 15. Spring 1; 16. Mounting plate; 17. Mounting hole; 18. U-shaped connector; 19. Bolt hole; 20. U-shaped sealing ring; 21. O-ring; 22. U-shaped ring; 23. Airbag; 24. Annular piston plate; 25. Air delivery groove; 26. Spring 2; 27. Pull plate; 28. Connecting rod; 29. ​​Groove; 30. Key; 31. Shaft baffle; 32. Exhaust port. DETAILED DESCRIPTION

[0020] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1

[0022] like Figure 1 and Figure 2 As shown, a double-piston hydraulic cylinder is provided, including a cylinder body 1, a piston rod 2 is provided inside the cylinder body 1, a right piston 3 is provided on the right side of the outer wall of the piston rod 2, a left piston 4 is provided on the left side of the outer wall of the piston rod 2, a gland 5 is fixedly connected to the left side of the left piston 4, an oil inlet 6 is integrally formed on the right side of the upper surface of the cylinder body 1, and an exhaust port 32 is integrally formed on the left side of the upper surface of the cylinder body 1;

[0023] When the hydraulic oil enters the interior of the cylinder body 1 from the right oil inlet 6, the hydraulic oil fills the chamber inside the cylinder body 1 under the action of pressure. Due to the pressure of the hydraulic oil acting on the right piston 3, the right piston 3 is pushed to the left, and the piston rod 2 is driven to move to the left. At the same time, the left piston 4 is fixed by the provided pressure cover 5 to prevent axial movement of the left piston 4 during operation. The provision of the pressure cover 5 and the left piston 4 can also prevent foreign matter from entering the interior of the cylinder body 1, avoiding wear on the interior of the cylinder body 1. The airflow generated by the sliding of the left piston 4 is discharged to the outside through the provided exhaust port 32. At the same time, the airflow can also be transported to other transmission devices through devices such as hoses for linkage cooperation, thereby increasing the practicality of the device.

[0024] like Figure 1 As shown, the right end of the cylinder body 1 is fixedly connected to a mounting plate 16, and a through-type mounting circular hole 17 is opened on the upper surface of the mounting plate 16;

[0025] The mounting circular holes 17 provided above the mounting plate 16 can be used to fix the hydraulic cylinder to an external device or a bracket by means of bolts, thereby achieving quick installation.

[0026] like Figure 1 As shown, the left end of the piston rod 2 extends to the left side of the cylinder body 1 and is fixedly connected to a U-shaped connector 18. Through-type bolt holes 19 are opened above and below the inner side wall of the U-shaped connector 18;

[0027] The U-shaped connector 18 and the bolt hole 19 can be used to fix the connection to an external working device. The piston rod 2 is fixed to the external working device by connectors such as bolts, thereby providing a flexible connection method.

[0028] like Figure 2 As shown, the outer side wall of the right piston 3 is provided with two U-shaped sealing rings 20, the outer side wall of the left piston 4 is provided with multiple O-rings 21, and the inner side wall of the left piston 4 is provided with a U-shaped ring 22;

[0029] The U-shaped sealing ring 20 can achieve a two-way sealing effect. When the hydraulic oil in the cylinder body 1 pushes the right piston 3 to move left or right, the U-shaped sealing ring 20 can effectively prevent the hydraulic oil from leaking to the other side from the gap between the right piston 3 and the cylinder body 1. The U-shaped ring 22 can ensure sealing while also helping the piston rod 2 to move smoothly in the cylinder body 1.

[0030] As shown in the figure and Figure 3 As shown, a positioning ring 7 is fixedly connected to the left side of the outer wall of the cylinder body 1, and an extrusion chamber 8 is integrally formed inside the positioning ring 7. A plug-in ring 9 is fixedly connected to the right side of the pressure cover 5. A through-type plug-in groove 10 is opened on the left side of the interior of the extrusion chamber 8, and the right side of the plug-in ring 9 passes through the plug-in groove 10. A control box 11 is fixedly connected to the upper and lower outer wall of the positioning ring 7. The interiors of the two control boxes 11 are slidably connected with sliding plates 12. The lower surfaces of the two sliding plates 12 are fixedly connected with oblique plates 13. The outer wall of the plug-in ring 9 is integrally formed with a card groove 14. The opposite ends of the two oblique plates 13 extend to the inside of the card groove 14. The opposite sides of the two sliding plates 12 are fixedly connected to the interiors of the two control boxes 11 with multiple springs 15. The opposite sides of the two control boxes 11 are provided with pull plates 27. The opposite sides of the two pull plates 27 are fixedly connected with multiple connecting rods 28. The ends of the multiple connecting rods 28 away from the two pull plates 27 are respectively fixedly connected between the two sliding plates 12;

[0031] When the pressing cover 5 is pushed, the two oblique plates 13 are engaged with the inner part of the card groove 14 by the rebound of the multiple springs 15, thereby fixing the pressing cover 5 and the left piston 4. The device is sealed by the pressing cover 5 and the left piston 4 to prevent dust and other impurities from contaminating the interior of the cylinder 1, thereby improving the service life of the device.

[0032] like Figure 2 As shown, an airbag 23 is fixedly connected to the inner wall of the cylinder body 1 and located on the outside of the gland 5. An annular piston plate 24 is slidably connected to the inside of the extrusion chamber 8 and located to the right of the two oblique plates 13. An air delivery groove 25 is opened between the inside of the extrusion chamber 8 and the airbag 23. A plurality of springs 26 are fixedly connected to the left side of the annular piston plate 24 and the left side of the inside of the extrusion chamber 8.

[0033] When the gland 5 and the left piston 4 are installed, the insertion of the plug-in ring 9 will also drive the annular piston plate 24 to slide to the right inside the extrusion chamber 8, thereby transporting the airflow inside the extrusion chamber 8 to the interior of the airbag 23 through the provided air delivery groove 25, and the airbag 23 will collide with it, so that the airbag 23 can be in close contact with the outer wall of the gland 5, further improving the sealing performance of the cylinder body 1.

[0034] like Figure 4 As shown, a groove 29 is provided on the outer wall of the piston rod 2 and on the right side of the right piston 3. A key 30 is fixedly connected to the interior of the groove 29, and a shaft stopper 31 is fixedly connected to the outer wall of the key 30.

[0035] The latch key 30 and the shaft baffle 31 can firmly connect the right piston 3 to the outside of the piston rod 2 to prevent the device from sliding or detaching relative to each other, thereby extending the service life of the hydraulic cylinder and reducing the maintenance costs caused by loose or damaged components.

[0036] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A double-piston hydraulic cylinder comprising a cylinder body (1), characterized in that: A piston rod (2) is provided inside the cylinder body (1), a right piston (3) is provided on the right side of the outer wall of the piston rod (2), a left piston (4) is provided on the left side of the outer wall of the piston rod (2), a pressure cover (5) is fixedly connected to the left side of the left piston (4), an oil inlet (6) is integrally formed on the right side of the upper surface of the cylinder body (1), and an exhaust port (32) is integrally formed on the left side of the upper surface of the cylinder body (1).

2. The dual-piston hydraulic cylinder according to claim 1, characterized in that: The left side of the outer wall of the cylinder body (1) is fixedly connected with a positioning ring (7), and an extrusion cavity (8) is integrally formed inside the positioning ring (7). The right side of the pressure cover (5) is fixedly connected with a plug-in ring (9), and a through-type plug-in groove (10) is provided on the left side of the inner side of the extrusion cavity (8). The right side of the plug-in ring (9) passes through the plug-in groove (10). The upper and lower sides of the outer wall of the positioning ring (7) are fixedly connected with a control box (11), and the interiors of the two control boxes (11) are slidably connected with a sliding plate (12), and the lower surfaces of the two sliding plates (12) are fixedly connected with an oblique plate. (13), the outer wall of the plug-in ring (9) is integrally formed with a card slot (14), the opposite ends of the two oblique plates (13) extend to the inside of the card slot (14), the opposite sides of the two sliding plates (12) are fixedly connected to the inside of the two control boxes (11) by a plurality of springs (15), the opposite sides of the two control boxes (11) are provided with a pull plate (27), the opposite sides of the two pull plates (27) are fixedly connected with a plurality of connecting rods (28), and the ends of the plurality of connecting rods (28) away from the two pull plates (27) are fixedly connected between the two sliding plates (12).

3. The dual-piston hydraulic cylinder according to claim 1, characterized in that: The right end of the cylinder body (1) is fixedly connected to a mounting plate (16), and a through-type mounting circular hole (17) is provided on the upper surface of the mounting plate (16).

4. The dual-piston hydraulic cylinder according to claim 1, characterized in that: The left end of the piston rod (2) extends to the left side of the cylinder body (1) and is fixedly connected to a U-shaped connecting piece (18). Through-type bolt holes (19) are provided above and below the inner side wall of the U-shaped connecting piece (18).

5. The dual-piston hydraulic cylinder according to claim 1, characterized in that: The outer side wall of the right piston (3) is provided with two U-shaped sealing rings (20), the outer side wall of the left piston (4) is provided with a plurality of O-rings (21), and the inner side wall of the left piston (4) is provided with a U-shaped ring (22).

6. The dual-piston hydraulic cylinder according to claim 2, characterized in that: An air bag (23) is fixedly connected to the inner wall of the cylinder body (1) and located on the outer side of the pressure cover (5); an annular piston plate (24) is slidably connected to the inside of the extrusion chamber (8) and located to the right of the two oblique plates (13); an air delivery groove (25) is provided between the inside of the extrusion chamber (8) and the air bag (23); and a plurality of springs (26) are fixedly connected to the left side of the annular piston plate (24) and the left side of the inside of the extrusion chamber (8).

7. The dual-piston hydraulic cylinder according to claim 1, characterized in that: A groove (29) is provided on the outer wall of the piston rod (2) and on the right side of the right piston (3). A key (30) is fixedly connected inside the groove (29), and a shaft baffle (31) is fixedly connected to the outer wall of the key (30).

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