Double-stroke double-force cylinder

Abstract

The utility model discloses a double-stroke double-force cylinder which comprises a rear cylinder cover, a rear shell, a first middle section connecting cover, a second middle section connecting cover, a front cylinder cover, a front shell and a middle shell, and a pull rod is fixedly connected between the rear cylinder cover and the front cylinder cover. A tail rod is fixedly connected to the middle of one end of the rear cylinder cover, a stroke control piston and a first double-force piston are installed in the rear shell, a second double-force piston is slidably connected to the inner wall of the middle shell, a third double-force piston is slidably connected to the inner wall of the front shell, and a cavity is formed in the middle of the third double-force piston. The inner wall of the cavity is in sliding connection with a small-stroke piston; an output shaft is fixedly connected to the middle of the first force multiplying piston. Through cooperation of the first double-force piston, the second double-force piston, the third double-force piston and the small-stroke piston with the output shaft, the double-force cylinder can achieve two-stroke operation, the output force is increased, the installation space is reduced under the condition that two-stroke control is needed, and the size of equipment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of booster cylinders, in particular to a double-stroke booster cylinder. Background Art

[0002] The booster cylinder uses the same pressure source, and its output force is several times that of the same cylinder. With large output force and the combination of multiple pistons, the output force increases multiplicatively, making it suitable for oil-free operation occasions with short stroke and high output force.

[0003] However, an ordinary booster cylinder has two cavities, one for air intake and one for exhaust. The solenoid valve is used to switch the air intake and exhaust to make the cylinder extend and retract. However, the cylinder has only one stroke. In the case of two-stroke control required, two cylinders need to be installed, which will increase the installation space and the volume of the equipment. Content of the Utility Model

[0004] The purpose of the utility model is to provide a double-stroke booster cylinder, which can enable the booster cylinder to achieve two-stroke operation, increase the output force, reduce the installation space in the case of two-stroke control required, and reduce the volume of the equipment.

[0005] To achieve the above object, a double-stroke double-acting cylinder is provided, which includes a rear cylinder head, a rear housing, a first middle connecting cover, a second middle connecting cover, a front cylinder head, a front housing and a middle housing. The rear cylinder head is fixedly connected to one end of the rear housing. The first middle connecting cover is fixedly connected to one end of the rear housing and is far from the rear cylinder head. The middle housing is fixedly connected to the end of the first middle connecting cover far from the rear housing. The second middle connecting cover is fixedly connected to the end of the middle housing far from the first middle connecting cover. The front housing is fixedly connected to the end of the second middle connecting cover far from the middle housing. The front cylinder head is fixedly connected to the end of the front housing far from the second middle connecting cover. A pull rod is fixedly connected between the rear cylinder head and the front cylinder head, and the pull rod is located outside the rear housing, the front housing and the middle housing. A tail rod is fixedly connected to the middle of one end of the rear cylinder head, and the tail rod penetrates through the rear cylinder head and extends into the rear housing. A stroke control piston and a first double-acting piston are installed in the rear housing, and the outer ends of the stroke control piston and the first double-acting piston are respectively slidably connected to the inner wall of the rear housing. One end of the tail rod penetrates through the stroke control piston and is slidably connected to the stroke control piston, and the tail rod extends into the first double-acting piston. The middle of the end of the first double-acting piston facing the stroke control piston extends into the stroke control piston, and the first double-acting piston is slidably connected to the stroke control piston. A second double-acting piston is slidably connected to the inner wall of the middle housing. A third double-acting piston is slidably connected to the inner wall of the front housing. A chamber is provided in the middle of the third double-acting piston, and the chamber penetrates through the end of the third double-acting piston far from the front cylinder head. A small-stroke piston is slidably connected to the inner wall of the chamber. A output shaft is fixedly connected to the middle of the first double-acting piston, and the end of the output shaft far from the front cylinder head penetrates through the middle of the first double-acting piston. One end of the tail rod is located in the middle of the output shaft and extends into the output shaft, and the tail rod is slidably connected to the inner wall of the output shaft. The end of the output shaft far from the rear cylinder head sequentially penetrates through the middle of the first middle connecting cover, the second double-acting piston, the second middle connecting cover, the small-stroke piston, the third double-acting piston and the front cylinder head, and the output shaft is respectively slidably connected to the first middle connecting cover, the second middle connecting cover, the third double-acting piston and the front cylinder head. The output shaft is respectively fixedly connected to the second double-acting piston and the small-stroke piston. It can enable the double-acting cylinder to achieve two-stage stroke operation, increase the output force, reduce the installation space in the case of two-stage stroke control, and reduce the volume of the equipment.

[0006] According to the double-stroke double-acting cylinder described above, sealing rings one are respectively fixedly connected to the outer ends of the first double-acting piston, the second double-acting piston and the third double-acting piston, and the first double-acting piston, the second double-acting piston and the third double-acting piston respectively penetrate through the middle of the sealing rings one. The sealing rings one are respectively in interference fit with the inner walls of the rear housing, the middle housing and the front housing. It is used to ensure the sealing between the double-acting piston and the double-acting cylinder housing.

[0007] According to the double-stroke double-acting cylinder described above, a fourth sealing ring is fixedly connected to the middle of the outer end of the stroke control piston, and the stroke control piston penetrates through the middle of the fourth sealing ring. The outer end of the fourth sealing ring is in interference fit with the rear housing. This is used to increase the sealing performance between the stroke control piston and the rear housing and ensure the output force of the double-acting cylinder.

[0008] According to the double-stroke double-acting cylinder described above, third sealing rings are respectively provided between the rear cylinder head and the rear housing, and between the front cylinder head and the front housing. This is used to ensure the sealing performance of the double-acting cylinder housing and prevent gas leakage inside the double-acting cylinder.

[0009] According to the double-stroke double-acting cylinder described above, a second sealing ring is fixedly connected to the middle of the outer end of the small-stroke piston, and the small-stroke control piston penetrates through the middle of the second sealing ring. The outer end of the second sealing ring is in interference fit with the side wall of the chamber. This is used to increase the sealing performance between the small-stroke control piston and the double-acting piston.

[0010] According to the double-stroke double-acting cylinder described above, the output shaft is hollow inside, and an opening is provided in the middle of the end of the output shaft far away from the front cylinder head, and the opening is communicated with the inside of the output shaft. The outer end of the output shaft is equidistantly provided with three pairs of connection holes, and the connection holes are communicated with the hollow inside of the output shaft. The three pairs of connection holes are respectively communicated with the inside of the rear housing, the inside of the middle housing, and the chamber. This is used to connect the spaces in the double-acting cylinder and enable the double-acting cylinder to operate in two strokes.

[0011] According to the double-stroke double-acting cylinder described above, a limiting structure is fixedly connected to the end of the tail rod located inside the output shaft, and the limiting structure is slidably connected to the inner wall of the output shaft. This is used to limit the movement of the stroke control piston.

[0012] According to the double-stroke double-acting cylinder described above, air supply pipes are respectively provided at the outer ends of the front cylinder head and the rear cylinder head, and the other ends of the air supply pipes of the front cylinder head and the rear cylinder head are respectively communicated with the inside of the front housing and the rear housing. This is used to input or extract gas into the double-acting cylinder and change the working state of the double-acting cylinder.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: Through the cooperation of the first double-acting piston, the second double-acting piston, the third double-acting piston, the small-stroke piston and the output shaft, the double-acting cylinder can realize two-stroke operation, increase the output force, reduce the installation space in the case of two-stroke control required, and reduce the volume of the equipment.

[0014] The additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0016] Figure 1 This is a three-dimensional view of the double-stroke double-acting cylinder of the present utility model;

[0017] Figure 2 This is a cross-sectional view of the double-stroke double-acting cylinder of the present utility model;

[0018] Figure 3 This is a cross-sectional view of the double-stroke double-acting cylinder of the present utility model.

[0019] In the figure: 1. Rear cylinder head; 2. Rear housing; 3. Tie rod; 4. Middle section connection cover one; 5. Middle section connection cover two; 6. Front cylinder head; 7. Output shaft; 8. Front housing; 9. Middle housing; 10. Tail rod; 11. Stroke control piston; 12. Double-acting piston one; 13. Double-acting piston two; 14. Small-stroke piston; 15. Double-acting piston three; 16. Seal ring one; 17. Seal ring two; 18. Seal ring three; 19. Chamber; 20. Seal ring four. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figures 1-3, the present utility model provides a technical solution: a double-stroke doubled force cylinder, which includes a rear cylinder head 1, a rear housing 2, a middle section connecting cover one 4, a middle section connecting cover two 5, a front cylinder head 6, a front housing 8 and a middle housing 9. The rear cylinder head 1 is fixedly connected to one end of the rear housing 2. The middle section connecting cover one 4 is fixedly connected to one end of the rear housing 2, and the middle section connecting cover one 4 is far from the rear cylinder head 1. The middle housing 9 is fixedly connected to the end of the middle section connecting cover one 4 far from the rear housing 2. The middle section connecting cover two 5 is fixedly connected to the end of the middle housing 9 far from the middle section connecting cover one 4. The front housing 8 is fixedly connected to the end of the middle section connecting cover two 5 far from the middle housing 9. The front cylinder head 6 is fixedly connected to the end of the front housing 8 far from the middle section connecting cover two 5. Air delivery pipelines are respectively arranged on the outer sides of the front cylinder head 6 and the rear cylinder head 1, and the other ends of the air delivery pipelines of the front cylinder head 6 and the rear cylinder head 1 are respectively communicated with the interiors of the front housing 8 and the rear housing 2, for inputting or extracting gas into the doubled force cylinder to change the working state of the doubled force cylinder. A pull rod 3 is fixedly connected between the rear cylinder head 1 and the front cylinder head 6, and the pull rod 3 is located outside the rear housing 2, the front housing 8 and the middle housing 9. Sealing rings three 18 are respectively arranged between the rear cylinder head 1 and the rear housing 2, and between the front cylinder head 6 and the front housing 8, for ensuring the sealing of the outer shell of the doubled force cylinder and avoiding the leakage of the gas inside the doubled force cylinder. A tail rod 10 is fixedly connected to the middle of one end of the rear cylinder head 1, and the tail rod 10 penetrates through the rear cylinder head 1 and extends into the rear housing 2. A stroke control piston 11 and a doubled force piston one 12 are installed in the rear housing 2, and the outer sides of the stroke control piston 11 and the doubled force piston one 12 are respectively slidably connected to the inner wall of the rear housing 2. A sealing ring four 20 is fixedly connected to the middle of the outer side of the stroke control piston 11, and the stroke control piston 11 penetrates through the middle of the sealing ring four 20. The outer side of the sealing ring four 20 is in interference fit with the rear housing 2, for increasing the sealing between the stroke control piston 11 and the rear housing 2 and ensuring the output force of the doubled force cylinder. One end of the tail rod 10 penetrates through the stroke control piston 11 and is slidably connected to the stroke control piston 11, and the tail rod 10 extends into the doubled force piston one 12. The middle of the end of the doubled force piston one 12 facing the stroke control piston 11 extends into the stroke control piston 11, and the doubled force piston one 12 is slidably connected to the stroke control piston 11. A doubled force piston two 13 is slidably connected to the inner wall of the middle housing 9, and a doubled force piston three 15 is slidably connected to the inner wall of the front housing 8. Sealing rings one 16 are respectively fixedly connected to the outer sides of the doubled force piston one 12, the doubled force piston two 13 and the doubled force piston three 15, and the doubled force piston one 12, the doubled force piston two 13 and the doubled force piston three 15 respectively penetrate through the middle of the sealing rings one 16. The sealing rings one 16 are respectively in interference fit with the inner walls of the rear housing 2, the middle housing 9 and the front housing 8, for ensuring the sealing between the doubled force pistons and the housing of the doubled force cylinder.The middle part of the triple-acting piston 15 is provided with a chamber 19, and the chamber 19 penetrates through one end of the triple-acting piston away from the front cylinder head 6. A small-stroke piston 14 is slidably connected to the inner wall of the chamber 19. In the middle of the outer end of the small-stroke piston 14, a second sealing ring 17 is fixedly connected. And the small-stroke control piston 11 penetrates through the middle of the second sealing ring 17. The outer end of the second sealing ring 17 is in interference fit with the side wall of the chamber 19, which is used to increase the sealing performance between the small-stroke control piston 11 and the triple-acting piston. In the middle of the first triple-acting piston 12, an output shaft 7 is fixedly connected. And one end of the output shaft 7 away from the front cylinder head 6 penetrates through the middle of the first triple-acting piston 12. One end of the tail rod 10 is located in the middle of the output shaft 7 and extends into the output shaft 7. And the tail rod 10 is slidably connected to the inner wall of the output shaft 7. One end of the tail rod 10 located inside the output shaft 7 is fixedly connected with a limiting structure, and the limiting structure is slidably connected to the inner wall of the output shaft 7, which is used to limit the movement of the stroke control piston 11. One end of the output shaft 7 away from the rear cylinder head 1 sequentially penetrates through the middle parts of the middle section connecting cover one 4, the second triple-acting piston 13, the middle section connecting cover two 5, the small-stroke piston 14, the triple-acting piston three 15 and the front cylinder head 6. And the output shaft 7 is slidably connected to the middle section connecting cover one 4, the middle section connecting cover two 5, the triple-acting piston three 15 and the front cylinder head 6 respectively. The output shaft 7 is fixedly connected to the second triple-acting piston 13 and the small-stroke piston 14 respectively. The inside of the output shaft 7 is hollow. And in the middle of one end of the output shaft 7 away from the front cylinder head 6, there is an opening, and the opening is communicated with the inside of the output shaft 7. On the outer side end of the output shaft 7, three pairs of connecting holes are equidistantly arranged, and the connecting holes are communicated with the hollow inside of the output shaft 7. The three pairs of connecting holes are respectively communicated with the inside of the rear housing 2, the inside of the middle housing 9 and the chamber 19, which is used to connect the spaces in the triple-acting cylinder, so that the triple-acting cylinder runs in two strokes.

[0022] Working principle: When in use, the gas enters through the gas pipeline of the rear cylinder head 1. The gas pushes the stroke control piston 11 and the first triple-acting piston 12 to move forward. The output shaft 7 on the first triple-acting piston 12 moves forward and extends out of the triple-acting cylinder accordingly. The output shaft 7 drives the second triple-acting piston 13 and the small-stroke piston 14 to move forward. The small-stroke piston 14 compresses the gas in the chamber 19, pushing the triple-acting piston three 15 to move forward. So that the gas between the triple-acting piston three 15 and the front cylinder head 6 is discharged through the gas pipeline on the front cylinder head 6. The gas between the first triple-acting piston 12 and the middle section connecting cover one 4, and the gas between the second triple-acting piston 13 and the middle section connecting cover two 5 enter the output shaft 7 through the connecting holes and then enter the chamber 19. The air pressure in the chamber 19 further increases and improves the forward thrust of the triple-acting piston three 15. The gas between the triple-acting piston three 15 and the front cylinder head 6 leaves the triple-acting cylinder through the gas pipeline, realizing the two-stroke operation of the triple-acting cylinder and increasing the output force.

[0023] The above has described the embodiments of the present invention in detail with reference to the drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of the present invention.

Claims

1. Double-stroke double-acting cylinder, comprising a rear cylinder head (1), a rear housing (2), a middle connecting cover one (4), a middle connecting cover two (5), a front cylinder head (6), a front housing (8) and a middle housing (9), characterized in that, The rear cylinder head (1) is fixedly connected to one end of the rear housing (2). The middle connecting cover one (4) is fixedly connected to one end of the rear housing (2), and the middle connecting cover one (4) is away from the rear cylinder head (1). The middle housing (9) is fixedly connected to the end of the middle connecting cover one (4) away from the rear housing (2). The middle connecting cover two (5) is fixedly connected to the end of the middle housing (9) away from the middle connecting cover one (4). The front housing (8) is fixedly connected to the end of the middle connecting cover two (5) away from the middle housing (9). The front cylinder head (6) is fixedly connected to the end of the front housing (8) away from the middle connecting cover two (5). A pull rod (3) is fixedly connected between the rear cylinder head (1) and the front cylinder head (6), and the pull rod (3) is located outside the rear housing (2), the front housing (8) and the middle housing (9). A tail rod (10) is fixedly connected to the middle of one end of the rear cylinder head (1), and the tail rod (10) penetrates through the rear cylinder head (1) and extends into the rear housing (2). A stroke control piston (11) and a first force multiplying piston (12) are installed in the rear housing (2), and the outer ends of the stroke control piston (11) and the first force multiplying piston (12) are respectively slidably connected to the inner wall of the rear housing (2). One end of the tail rod (10) penetrates through the stroke control piston (11) and is slidably connected to the stroke control piston (11), and the tail rod (10) extends into the first force multiplying piston (12). The middle of the end of the first force multiplying piston (12) facing the stroke control piston (11) extends into the stroke control piston (11), and the first force multiplying piston (12) is slidably connected to the stroke control piston (11). A second force multiplying piston (13) is slidably connected to the inner wall of the middle housing (9). A third force multiplying piston (15) is slidably connected to the inner wall of the front housing (8). A chamber (19) is provided in the middle of the third force multiplying piston (15), and the chamber (19) penetrates through the end of the third force multiplying piston away from the front cylinder head (6). A small stroke piston (14) is slidably connected to the inner wall of the chamber (19). An output shaft (7) is fixedly connected to the middle of the first force multiplying piston (12), and the end of the output shaft (7) away from the front cylinder head (6) penetrates through the middle of the first force multiplying piston (12). One end of the tail rod (10) is located in the middle of the output shaft (7) and extends into the output shaft (7), and the tail rod (10) is slidably connected to the inner wall of the output shaft (7). The end of the output shaft (7) away from the rear cylinder head (1) sequentially penetrates through the middle of the middle connecting cover one (4), the second force multiplying piston (13), the middle connecting cover two (5), the small stroke piston (14), the third force multiplying piston (15) and the front cylinder head (6), and the output shaft (7) is respectively slidably connected to the middle connecting cover one (4), the middle connecting cover two (5), the third force multiplying piston (15) and the front cylinder head (6). The output shaft (7) is respectively fixedly connected to the second force multiplying piston (13) and the small stroke piston (14).

2. The double-stroke double-acting cylinder according to claim 1, wherein: Sealing rings one (16) are respectively fixedly connected to the outer ends of the first power piston (12), the second power piston (13) and the third power piston (15), and the first power piston (12), the second power piston (13) and the third power piston (15) respectively penetrate through the middle parts of the sealing rings one (16). The sealing rings one (16) are in interference fit with the inner walls of the rear housing (2), the middle housing (9) and the front housing (8).

3. The double-stroke double-acting cylinder according to claim 1, wherein: A sealing ring four (20) is fixedly connected to the middle part of the outer end of the stroke control piston (11), and the stroke control piston (11) penetrates through the middle part of the sealing ring four (20). The outer end of the sealing ring four (20) is in interference fit with the rear housing (2).

4. The double-stroke double-acting cylinder according to claim 1, characterized in that: Sealing rings three (18) are respectively provided between the rear cylinder head (1) and the rear housing (2), and between the front cylinder head (6) and the front housing (8).

5. The double-stroke double-acting cylinder according to claim 1, characterized in that: A sealing ring two (17) is fixedly connected to the middle part of the outer end of the small stroke piston (14), and the small stroke control piston (11) penetrates through the middle part of the sealing ring two (17). The outer end of the sealing ring two (17) is in interference fit with the side wall of the chamber (19).

6. The double-stroke double-acting cylinder according to claim 1, wherein: The output shaft (7) is hollow inside, and an opening is provided in the middle of one end of the output shaft (7) away from the front cylinder head (6), and the opening is communicated with the inside of the output shaft (7). Three pairs of connecting holes are equidistantly provided on the outer side end of the output shaft (7), and the connecting holes are communicated with the hollow inside of the output shaft (7). The three pairs of connecting holes are respectively communicated with the inside of the rear housing (2), the inside of the middle housing (9) and the chamber (19).

7. The double-stroke double-acting cylinder according to claim 1, wherein: A limiting structure is fixedly connected to one end of the tail rod (10) located inside the output shaft (7), and the limiting structure is slidably connected to the inner wall of the output shaft (7).

8. The double-stroke double-acting cylinder according to claim 1, characterized in that, Gas transmission pipelines are respectively provided on the outer side ends of the front cylinder head (6) and the rear cylinder head (1), and the other ends of the gas transmission pipelines of the front cylinder head (6) and the rear cylinder head (1) are respectively communicated with the inside of the front housing (8) and the rear housing (2).

Images