Novel differential oil cylinder

Abstract

The novel differential oil cylinder comprises an oil cylinder body, an oil cylinder front cover is fixedly installed at one end of the oil cylinder body through a first hexagon socket cap screw, an oil cylinder rear cover is fixedly installed at the other end of the oil cylinder body through a second hexagon socket cap screw, a first oil inlet and outlet is formed in one side of the oil cylinder rear cover, and a second oil inlet and outlet is formed in the other side of the oil cylinder rear cover. A second oil inlet and outlet is formed in one side of the oil cylinder front cover, and the first oil inlet and outlet and the second oil inlet and outlet are both of a logic valve structure. According to the differential oil cylinder, a straight-through type oil inlet and outlet formed in the end of a conventional differential oil cylinder is changed into a logic valve type oil inlet and outlet structure formed in the rear cover of the oil cylinder, the oil passing mode of the differential oil cylinder is changed, and the reliability and stability of the differential oil cylinder during adjustment can be effectively improved; by means of the sealing assembly arranged at the oil inlet and outlet, when an oil pipe is connected with the oil inlet and outlet, the sealing performance of the connecting position is effectively improved, and therefore the stability of oil way operation is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of differential cylinder technology and relates to a novel differential cylinder. Background Technology

[0002] A differential hydraulic cylinder is a single-piston rod hydraulic cylinder that uses the effective area difference between the two ends of the hydraulic cylinder to achieve rapid transmission. Through differential connection, the piston moves at high speed under the pressure difference on both sides. There are many types of differential cylinders, including piston-type differential cylinders, plunger-type differential cylinders, and swing-type differential cylinders.

[0003] For piston-type differential hydraulic cylinders, according to Figure 5 and Figure 6 As shown, the inlet and outlet ports of a traditional piston-type differential cylinder are located at the end of the differential cylinder, and the inlet and outlet ports are of a straight-through type. This type of differential cylinder has a long oil passage, and the straight-through inlet and outlet ports affect the stability of hydraulic oil flow, thereby affecting the stability and reliability of differential cylinder operation. Summary of the Invention

[0004] The purpose of this invention is to provide a novel differential hydraulic cylinder to solve the problems mentioned in the background art.

[0005] The objective of this invention can be achieved through the following technical solution: A novel differential hydraulic cylinder includes a cylinder, one end of which is fixedly mounted with a front cover by a first hexagon socket head cap screw, and the other end of which is fixedly mounted with a rear cover by a second hexagon socket head cap screw. A first oil inlet / outlet is provided on one side of the rear cover, and a second oil inlet / outlet is provided on one side of the front cover. Both the first and second oil inlet / outlet are logic valve structures, and oil port sealing components are fixedly provided at the top of both the first and second oil inlet / outlet. The purpose of this design is to change the oil inlet / outlet location from the traditional end of the differential hydraulic cylinder to the rear cover, thereby altering the oil inlet method and effectively improving the stability of oil inlet / outlet operation by setting the inlet / outlet to a logic valve structure, thus enhancing the operational stability of the differential hydraulic cylinder.

[0006] In the aforementioned novel differential cylinder, a second pressure oil chamber is provided inside the cylinder, and a piston is nested inside the second pressure oil chamber. Two first sealing rings are fitted onto the surface of the piston, and a piston rod is fixedly connected to one end of the piston. The piston rod is interlocked with the center of the cylinder front cover. The purpose of this arrangement is to improve the sealing performance at the connection between the piston and the cylinder through the sealing rings fitted onto the piston surface.

[0007] In the aforementioned novel differential cylinder, a differential cylinder is fixedly connected to the other end of the piston. A differential cylinder is also fixedly located at the center of one end of the cylinder's rear cover. A first pressure oil chamber is formed inside the differential cylinder, which extends through the rear cover into the first pressure oil chamber. This arrangement aims to achieve movement between the differential rod and the differential cylinder.

[0008] In the aforementioned novel differential cylinder, the second pressure oil chamber is connected to the second inlet / outlet, and the first pressure oil chamber is connected to the first inlet / outlet. This arrangement aims to achieve the retractable piston rod by connecting the first and second inlet / outlet to the first and second pressure oil chambers respectively, through which hydraulic oil within the pressure oil chambers drives the piston's movement.

[0009] In the aforementioned novel differential cylinder, an air chamber is formed between the piston and the cylinder rear cover, and an exhaust port communicating with the air chamber is provided on the top side of the cylinder rear cover. This design allows for rapid gas discharge during the operation of the differential cylinder.

[0010] In the aforementioned novel differential cylinder, the oil port sealing assembly includes a retaining ring. The top ends of both the first and second oil inlets / outlets are fixedly fitted with retaining rings. An oil pipe is sleeved and connected to the center of the retaining ring. Multiple annular grooves are formed at the ends of the oil pipes. Annular grooves are formed at the tops of both the first and second oil inlets / outlets. A liftable annular block is nested inside the annular groove. Multiple annular pressure rings, matching the size of the annular grooves, are fixedly fixed at equal intervals at the top of the annular blocks. These annular pressure rings are pressed into the annular grooves. This design effectively seals the connection between the oil pipe and the oil inlet / outlet, improving the stability of the hydraulic circuit operation.

[0011] In the aforementioned novel differential cylinder, a sealing ring with a size matching the outer diameter of a fixing ring is fixedly provided on the surface of one end of the oil pipe. A fixing bolt is threadedly connected between the sealing ring and the fixing ring, and multiple second sealing rings are sleeved and connected at the nesting point between the oil pipe and the fixing ring. The purpose of this arrangement is to further improve the sealing performance at the connection point through the sleeved second sealing rings.

[0012] In the aforementioned novel differential cylinder, cavities are formed on both sides of the fixed ring. Each cavity has a connecting oil passage at its bottom corner that communicates with the bottom of the annular groove. A pressure plate, matching the size of each cavity, is nested inside each cavity. The ends of two fixing bolts extend into the cavity and abut against the center of the pressure plate's top. This arrangement aims to push the pressure plate downwards by screwing in the fixing bolts. This downward movement of the pressure plate facilitates the introduction of sealing oil into the annular groove. The oil in the annular groove then pushes the annular block upwards, pressing the annular pressure ring at the top of the annular block into the annular groove.

[0013] In the aforementioned novel differential cylinder, a convex fixing post is fixedly provided at the center of the bottom of the two cavities. A return spring is nested and connected to the top of the convex fixing post. The bottom end of the return spring is fixedly connected to the top of the convex fixing post, and the top end of the return spring is fixedly connected to the center of the bottom end of the pressure plate. The purpose of this arrangement is to enable the pressure plate to be lifted in the initial state through the cooperation of the convex post and the return spring.

[0014] Compared with the prior art, the advantages of the novel differential cylinder of the present invention are as follows:

[0015] 1. By changing the oil supply method of the conventional differential cylinder from a straight-through oil inlet / outlet port at the end of the differential cylinder to a logic valve-type oil inlet / outlet port at the rear cover of the cylinder, the reliability and stability of the differential cylinder during adjustment can be effectively improved.

[0016] 2. By installing sealing components at the oil inlet and outlet, the sealing performance at the connection point is effectively improved when the oil pipe is connected to the oil inlet and outlet, thereby ensuring the stability of the oil circuit operation. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural schematic diagram of a novel differential hydraulic cylinder according to the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the first oil inlet / outlet of a novel differential cylinder according to the present invention.

[0019] Figure 3 This is a cross-sectional structural diagram of the oil port sealing assembly of a novel differential cylinder according to the present invention.

[0020] Figure 4 This is a schematic diagram of the annular block structure of a novel differential cylinder according to the present invention.

[0021] Figure 5 This is a cross-sectional structural diagram of a traditional differential hydraulic cylinder.

[0022] Figure 6This is a schematic diagram of the inlet and outlet structure of a traditional differential hydraulic cylinder.

[0023] In the diagram, 1. Piston rod; 2. Cylinder front cover; 3. First hexagon socket head cap screw; 4. Cylinder; 5. Piston; 6. Second hexagon socket head cap screw; 7. Cylinder rear cover; 8. Differential rod; 9. Differential cylinder; 10. First pressure oil chamber; 11. First oil inlet / outlet; 12. Exhaust port; 13. Air chamber; 14. Second pressure oil chamber; 15. Second oil inlet / outlet; 16. First sealing ring; 17. Oil port sealing assembly; 18. Oil pipe; 19. Sealing ring; 20. Fixing bolt; 21. Cavity; 22. Pressure plate; 23. Convex fixing post; 24. Return spring; 25. Annular groove; 26. Connecting oil passage; 27. Annular block; 28. Annular pressure ring; 29. ​​Annular pressure groove; 30. Second sealing ring; 31. Fixing ring. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] Example 1

[0026] Please refer to Figures 1-4. This invention discloses a novel differential hydraulic cylinder, comprising a hydraulic cylinder 4. One end of the hydraulic cylinder 4 is fixedly mounted with a front cover 2 by a first hexagon socket head cap screw 3, and the other end of the hydraulic cylinder 4 is fixedly mounted with a rear cover 7 by a second hexagon socket head cap screw 6. A first oil inlet / outlet 11 is provided on one side of the rear cover 7, and a second oil inlet / outlet 15 is provided on one side of the front cover 2. Both the first oil inlet / outlet 11 and the second oil inlet / outlet 15 are logic valve structures, and an oil port sealing assembly 17 is fixedly provided on the top of both the first oil inlet / outlet 11 and the second oil inlet / outlet 15.

[0027] Specifically, by changing the structure of the first oil inlet / outlet 11 and the second oil inlet / outlet 15 to a logic valve structure, the stability of oil inlet and outlet is improved. At the same time, the traditional position of the first oil inlet / outlet 11 is set at the rear cover 7 of the cylinder, shortening the oil circuit and further improving the reliability of the differential cylinder operation.

[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this invention discloses a novel differential cylinder. The cylinder 4 has a second pressure oil chamber 14 inside, and a piston 5 is nested inside the second pressure oil chamber 14. Two first sealing rings 16 are fitted onto the surface of the piston 5. A piston rod 1 is fixedly connected to one end of the piston 5, and the piston rod 1 is inserted into the center of the cylinder front cover 2. A differential cylinder 9 is fixedly connected to the other end of the piston 5. A differential cylinder 9 is fixedly located at the center of one end of the cylinder rear cover 7. A first pressure oil chamber 10 is opened inside the differential cylinder 9, extending through the cylinder rear cover 7 into the first pressure oil chamber 10. The second pressure oil chamber 14 communicates with a second inlet / outlet port 15, and the first pressure oil chamber 10 communicates with a first inlet / outlet port 11.

[0029] Specifically, through the cooperation of the first pressure oil chamber 10 and the second pressure oil chamber 14, the hydraulic oil inside the pressure oil chamber flows through the pipeline, thereby pushing the piston 5 to move inside the oil cylinder 4, and the movement of the piston 5 drives the extension and retraction of the piston rod 1.

[0030] An air chamber 13 is formed between the piston 5 and the cylinder rear cover 7, and an exhaust port 12 communicating with the air chamber 13 is opened on the top side of the cylinder rear cover 7.

[0031] Specifically, through the exhaust port 12, the differential lever 8 can quickly expel the gas inside the oil cylinder 4 during its movement, preventing gas from mixing into the hydraulic oil and affecting the stability of the oil circuit operation.

[0032] Example 2

[0033] like Figure 1 , Figure 3 and Figure 4As shown, this invention discloses a novel differential hydraulic cylinder. The oil port sealing assembly 17 includes a fixing ring 31. The top ends of both the first oil inlet / outlet 11 and the second oil inlet / outlet 15 are fixedly provided with fixing rings 31. An oil pipe 18 is sleeved and connected to the center of the fixing ring 31. Multiple annular grooves 29 are formed at the ends of the oil pipe 18. Annular grooves 25 are formed at the tops of both the first and second oil inlet / outlet 11 and the second oil inlet / outlet 15. A liftable annular block 27 is nested inside the annular groove 25. Multiple annular pressure rings 28, whose dimensions are adapted to the annular grooves 29, are fixedly fixed at equal intervals at the top of the annular block 27. The multiple annular pressure rings 28 are pressed into the annular grooves 29. Inside the 9, a sealing ring 19 with a size matching the outer diameter of the fixing ring 31 is fixedly provided on the surface of one end of the oil pipe 18. A fixing bolt 20 is threadedly connected between the sealing ring 19 and the fixing ring 31. Multiple second sealing rings 30 are sleeved and connected at the nesting point between the oil pipe 18 and the fixing ring 31. A cavity 21 is opened on both sides inside the fixing ring 31. A connecting oil passage 26 communicating with the bottom corner of the two cavities 21 is opened. A pressure plate 22 with a size matching the cavity 21 is nested inside the two cavities 21. The ends of the two fixing bolts 20 extend into the cavity 21 and abut against the center of the top of the pressure plate 22.

[0034] A convex fixing post 23 is fixedly provided at the center of the bottom of the two cavities 21. A reset spring 24 is nested and connected to the top of the convex fixing post 23. The bottom end of the reset spring 24 is fixedly connected to the top of the convex fixing post 23, and the top end of the reset spring 24 is fixedly connected to the center of the bottom end of the pressure plate 22.

[0035] Specifically, when connecting the oil pipe 18 to the fixing ring 31 at the top of the inlet and outlet, first insert the end of the oil pipe 18 into the inside of the fixing ring 31 until the bottom end of the sealing ring 19 contacts the top end of the fixing ring 31. Then, manually rotate the fixing bolts 20 on both sides of the top end of the sealing ring 19. The fixing bolts 20 are screwed into the inside of the fixing ring 31, and the end of the fixing bolt 20 extends into the inside of the cavity 21 and contacts the top end of the pressure plate 22. Continue to screw the fixing bolts 20 in, and the pressure plate 22 is pushed down by the fixing bolts 20. The pressure plate 22 pushes the sealing oil at the bottom of the cavity 21 to flow from the connecting oil passage 26 into the inside of the annular groove 25. The filling of the sealing oil at the bottom of the annular groove 25 squeezes the annular block 27 to move up. As the annular block 27 moves up, the annular pressure ring 28 provided at the top of the annular block 27 is pressed into the annular pressure groove 29 opened at the end of the oil pipe 18, thereby achieving a seal between the oil pipe 18 and the inlet and outlet, and improving the stability of the differential cylinder during the oil supply process.

[0036] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A novel differential hydraulic cylinder, comprising a cylinder (4), characterized in that, One end of the cylinder (4) is fixedly mounted with a cylinder front cover (2) by a first internal hexagonal head screw (3), and the other end of the cylinder (4) is fixedly mounted with a cylinder rear cover (7) by a second internal hexagonal head screw (6). A first oil inlet / outlet (11) is provided on one side of the cylinder rear cover (7), and a second oil inlet / outlet (15) is provided on one side of the cylinder front cover (2). Both the first oil inlet / outlet (11) and the second oil inlet / outlet (15) are logic valve structures, and oil port sealing components (17) are fixedly provided on the top of both the first oil inlet / outlet (11) and the second oil inlet / outlet (15).

2. The novel differential cylinder according to claim 1, characterized in that, The cylinder (4) has a second pressure oil chamber (14) inside, and a piston (5) is nested inside the second pressure oil chamber (14). Two first sealing rings (16) are sleeved on the surface of the piston (5). A piston rod (1) is fixedly connected to one end of the piston (5), and the piston rod (1) is inserted and connected to the center of the cylinder front cover (2).

3. A novel differential cylinder according to claim 2, characterized in that, The other end of the piston (5) is fixedly connected to a differential cylinder (9). A differential cylinder (9) is fixedly provided at the center of one end of the cylinder rear cover (7). A first pressure oil chamber (10) is opened inside the differential cylinder (9). The differential cylinder (9) extends through the cylinder rear cover (7) to the inside of the first pressure oil chamber (10).

4. A novel differential cylinder according to claim 3, characterized in that, The second pressure oil chamber (14) is connected to the second inlet / outlet (15), and the first pressure oil chamber (10) is connected to the first inlet / outlet (11).

5. A novel differential cylinder according to claim 3, characterized in that, An air chamber (13) is formed between the piston (5) and the cylinder rear cover (7), and an exhaust port (12) communicating with the air chamber (13) is opened on the top side of the cylinder rear cover (7).

6. A novel differential cylinder according to claim 1, characterized in that, The oil port sealing assembly (17) includes a fixing ring (31). The top ends of the first oil inlet / outlet (11) and the second oil inlet / outlet (15) are both fixedly provided with a fixing ring (31). An oil pipe (18) is sleeved and connected at the center of the fixing ring (31). The end of the oil pipe (18) is provided with multiple annular pressure grooves (29). The top of the first oil inlet / outlet (11) and the second oil inlet / outlet (15) are both provided with annular grooves (25). An adjustable annular block (27) is nested inside the annular groove (25). Multiple annular pressure rings (28) that are adapted to the size of the annular pressure groove (29) are fixedly provided at equal intervals at the top of the annular block (27). The multiple annular pressure rings (28) are pressed into the annular pressure groove (29).

7. A novel differential cylinder according to claim 6, characterized in that, A sealing ring (19) with a size matching the outer diameter of a fixing ring (31) is fixedly provided on the surface of one end of the oil pipe (18). A fixing bolt (20) is threadedly connected between the sealing ring (19) and the fixing ring (31), and multiple second sealing rings (30) are sleeved and connected at the nesting point between the oil pipe (18) and the fixing ring (31).

8. A novel differential cylinder according to claim 7, characterized in that, The fixing ring (31) has cavities (21) on both sides inside. The bottom corners of the two cavities (21) have oil passages (26) that communicate with the bottom of the annular groove (25). The interior of the two cavities (21) is nested with pressure plates (22) that are adapted to the size of the cavity (21). The ends of the two fixing bolts (20) extend into the interior of the cavity (21) and abut against the center of the top of the pressure plate (22).

9. A novel differential cylinder according to claim 8, characterized in that, A convex fixing post (23) is fixedly provided at the center of the bottom of the two cavities (21). A reset spring (24) is nested and connected to the top of the convex fixing post (23). The bottom end of the reset spring (24) is fixedly connected to the top of the convex fixing post (23), and the top end of the reset spring (24) is fixedly connected to the center of the bottom end of the pressure plate (22).

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