A three-axis cylinder

Abstract

The utility model discloses a three -axis cylinder, including cylinder body and push board, is equipped with cylinder cavity, piston rod and piston piece on the cylinder body, still set up sealing ring group opposite piston rod on the cylinder body, and sealing ring group includes sealing sleeve, inner sealing rubber ring and outer sealing rubber ring, and inner sealing rubber ring and outer sealing rubber ring are equipped with respectively inlaying part and elastic let -alone groove, the three -axis cylinder of the utility model is based on three -axis setting and avoids lateral force influence simultaneously, sets up buffer air passage and forms exhaust back pressure through air passage change at the end of stroke, and the buffer piston piece, piston rod acts, and in order to satisfy the use of high air pressure and the completion of back pressure buffering, further adjusts the cavity air -tight sealing structure, and through the double -layered sealing ring of inside and outside constitutes high -sealing adaptation structure, reaches relatively has strong air -tight sealing and stroke buffering capacity, is applicable to the working condition process cylinder use under high load.

Description

Technical Field

[0001] This utility model relates to the field of cylinder technology, specifically to a three-axis cylinder. Background Technology

[0002] A cylinder is a pneumatic actuator that converts compressed air into mechanical energy, and it is widely used in the machinery industry as a power output device. In existing technology, cylinders typically have only one piston rod. However, the limited load-bearing capacity of a cylinder leads to unstable power output, especially under conditions where lateral forces may exist, failing to meet output requirements. Therefore, three-axis cylinders were developed, using a guide rod in conjunction with the piston rod to disperse lateral forces through the cooperation of three rods. However, when the load is large, such as for cylinders used on assembly lines to push heavy-load fixtures, a higher air pressure is required to convert the power. This results in higher sealing requirements for the cylinder itself, and the high-pressure thrust causes a large force when the cylinder pushes the fixture. Each push can cause collisions between fixtures, potentially leading to vibration and displacement of workpieces at nearby workstations, thus interfering with the processing accuracy of automated production lines. Utility Model Content

[0003] In view of the prior art, the purpose of this utility model is to provide a three-axis cylinder with relatively strong air sealing and stroke buffering capabilities, which can be used in high-load working conditions.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a three-axis cylinder, including a cylinder body and a push plate, the cylinder body is provided with a cylinder cavity, a piston rod and a piston component fixed on the piston rod, one end of the piston rod extending into the cylinder cavity is provided with a sealing retaining ring and a sealing ring assembly, the sealing ring assembly includes a sealing sleeve, an inner sealing rubber ring and an outer sealing rubber ring, the inner sealing rubber ring and the outer sealing rubber ring are respectively provided with an fitting part and an elastic relief groove, the two are fitted together and installed on the inner side of the sealing sleeve for air sealing between the piston rod and the sealing sleeve, and an O-ring is also provided on the outer side of the sealing sleeve for sealing the air seal between the cylinder body and the sealing sleeve.

[0005] As a further provision of the above scheme, the cylinder body is provided with a propulsion air passage and a retraction air passage on both sides of the piston movement stroke in the cylinder cavity. Both include an air port, a straight air passage and an oblique air passage connecting the air port and the cylinder cavity.

[0006] As a further provision of the above scheme, the cylinder body also includes a buffer air passage and a buffer pad. The buffer air passage and the buffer pad are located between the propulsion air passage and the retraction air passage, and are located near the propulsion air passage or the retraction air passage or on both sides according to the usage requirements. The buffer pad is set corresponding to the buffer air passage and is used to close the buffer air passage under the thrust of the piston rod driving the piston component.

[0007] As a further feature of the above scheme, the cylinder block is also provided with exhaust ports corresponding to the air ports, and the exhaust ports are also provided with air seal plugs and threaded caps for sealing the exhaust ports.

[0008] As a further feature of the above scheme, an air seal plate is provided on the other side of the cylinder cavity to close the opening at the end of the cylinder cavity. The sealing ring is also provided with a through hole for the piston rod. Both the air seal plate and the sealing ring are installed by limiting the position using a retaining ring with an inner ring groove and matching size on the cylinder body.

[0009] As a further feature of the above scheme, the two guide holes and the cylinder cavity on the cylinder body are arranged side by side, and the cylinder cavity is located between the two guide holes. A guide rod opposite to the guide hole is also fixed on the push plate. One end of the guide rod and the piston rod are fixed on the push plate, and the other end extends into the guide hole and the cylinder cavity, respectively.

[0010] Beneficial effects: This utility model of a three-axis cylinder, while avoiding the influence of lateral forces, features a multi-channel structure design that creates different stroke stages and effects within the cylinder cavity. This results in exhaust back pressure at the end of the stroke through changes in the air channels, buffering the movement of the piston and piston rod. Furthermore, to meet the requirements of high-pressure applications and back pressure buffering, the cavity air-sealing structure is further adjusted. A high-sealing adaptation structure is formed by inner and outer double sealing rings, achieving relatively strong air-sealing and stroke buffering capabilities. It is suitable for use in process cylinders under high-load conditions. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the three-axis front structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the three-axis back structure of this utility model.

[0013] Figure 3 This is a schematic diagram of the internal air passages in the cylinder block cross-section of this embodiment.

[0014] Figure 4 This is a schematic diagram of the sealing ring structure in this embodiment.

[0015] Reference numerals: 1. Cylinder block; 10. Propulsion air passage; 11. Retraction air passage; 12. Piston; 13. Cylinder chamber; 14. Guide hole; 15. Air seal plate; 16. Sealing retainer ring; 17. Through hole; 18. Opening; 19. Air port; 2. Push plate; 21. Guide rod; 22. Piston rod; 3. Sealing ring assembly; 30. Sealing sleeve; 31. Inner sealing ring; 32. Outer sealing ring; 33. O-ring; 36. Fitting part; 37. Elastic groove; 41. Air seal plug; 42. Threaded locking cap; 43. Exhaust port; 44. Straight air passage; 45. Angled air passage; 51. Inner ring groove; 52. Snap ring; 61. Buffer air passage; 62. Buffer pad plug. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other.

[0017] like Figures 1-4 The illustrated triaxial cylinder includes a cylinder body 1 and a push plate 2. The cylinder body 1 is provided with a cylinder cavity 13, a piston rod 22, and a piston component 12 fixed on the piston rod 22. One end of the piston rod 22 that extends into the cylinder cavity 13 is provided with a sealing retaining ring 16 and a sealing ring assembly 3. The sealing ring assembly 3 includes a sealing sleeve 30, an inner sealing rubber ring 31, and an outer sealing rubber ring 32. The inner sealing rubber ring 31 and the outer sealing rubber ring 32 are respectively provided with an fitting part 36 and an elastic relief groove 37. The two are fitted together and installed inside the sealing sleeve 30 for air sealing between the piston rod 22 and the sealing sleeve 30. An O-ring rubber ring 33 is also provided on the outside of the sealing sleeve 30 for sealing the air seal between the cylinder body 1 and the sealing sleeve 30.

[0018] As a further provision of the above scheme, the cylinder body 1 is provided with a propulsion air passage 10 and a retraction air passage 11 on both sides of the piston 12 in the cylinder cavity 13, respectively. Both include an air port 19, a straight air passage 44 and an oblique air passage 45 connecting the air port 19 and the cylinder cavity 13.

[0019] As a further provision of the above scheme, the cylinder body 1 also includes a buffer air passage 61 and a buffer plug 62. The buffer air passage 61 and the buffer plug 62 are located between the propulsion air passage 10 and the retraction air passage 11, and are located near the propulsion air passage 10 or the retraction air passage 11 or on both sides according to the usage requirements. The buffer plug 62 is set corresponding to the buffer air passage 61 and is used to close the buffer air passage 61 under the thrust of the piston rod 22 driving the piston component 12.

[0020] As a further provision of the above scheme, the cylinder body 1 is also provided with exhaust reserved ports 43 respectively corresponding to the air ports 19, and the exhaust reserved ports 43 are also provided with air seal plugs 41 and threaded lock caps 42 for sealing the exhaust reserved ports 43.

[0021] As described above, combined with Figure 3 In this utility model, the airflow channel is configured such that a propulsion airway 10 and a retraction airway 11, which are respectively connected to two air ports 19, are provided on the outer sides of the two ends of the piston 12's active stroke. It is worth noting that the air ports 19 are configured by drilling a straight airway 44 from the side to connect to the exhaust reserved port 43, and at the position of the air port 19 relative to the cylinder cavity 13, an oblique airway 45 is drilled from the oblique direction to connect the air port 19 and the cylinder cavity 13 to form an airway configuration. The overall structure of the cylinder body 1 is simple, easy to process, and convenient to produce.

[0022] As a further provision of the above scheme, an air seal plate 15 is provided on the other side of the cylinder cavity 13 to close the opening 18 at the end of the cylinder cavity 13. The sealing ring 16 is also provided with a through hole 17 for the piston rod 22. The air seal plate 15 and the sealing ring 16 are both installed by limiting the inner ring groove 51 and the matching snap ring 52 on the cylinder body 1.

[0023] As a further provision of the above scheme, the two guide holes 14 and the cylinder cavity 13 on the cylinder body 1 are arranged side by side, and the cylinder cavity 13 is located between the two guide holes 14. The push plate 2 is also fixed with a guide rod 21 opposite to the guide hole 14. One end of the guide rod 21 and the piston rod 22 are fixed on the push plate 2, and the other end extends into the guide hole 14 and the cylinder cavity 13 respectively.

[0024] Example refer to Figure 1 and Figure 2 The three-axis cylinder structure of this utility model, as shown, mainly includes a square cylinder body 1 and a push plate 2 that moves relative to the cylinder body 1. In use, the cylinder body 1 is fixed to the equipment via bolt holes. Then, the push plate 2 is installed and fixed facing the direction of tooling travel or the direction requiring pushing on the production line. Subsequently, air is supplied through the propulsion air passage 10 and retraction air passage 11 on the cylinder body 1 via an external pneumatic device, thereby enabling the piston 12 to move within the cylinder cavity 13 of the cylinder body 1 using pneumatic pressure. This drives the piston rod 22 and the push plate 2 to perform axial extension and retraction. Further, as... Figure 1 and Figure 2 As shown, a guide hole 14 is provided on each side of the cylinder body 1 relative to the cylinder cavity 13, and guide rods 21 are also provided side by side on both sides of the piston rod 22 fixedly connected to the push plate 2, extending into the guide hole 14. All three rods are fixed at one end on the push plate 2. The influence of lateral force on the piston rod 22 is solved by the setting of guide rods 21 and guide holes 14.

[0025] Furthermore, based on the requirement that the cylinder drives the push plate 2 to simultaneously drive the two guide rods 21 to perform axial extension and retraction, and based on the demand for high loads, such as Figure 3 and Figure 4 As shown, in this embodiment, the cylinder cavity 13 is further provided with a high-sealing sealing ring assembly 3 on the side of the relatively telescopic piston rod 22, including a sealing sleeve 30, an inner sealing ring 31, and an outer sealing ring 32, wherein the inner sealing ring 31 and the outer sealing ring 32 are as follows: Figure 4 As shown, each of the inner and outer sealing rings 31 and 32 has an elastic groove 37 and an expansion ring that fits the piston rod 22. During installation, the expansion ring is sleeved on the piston rod 22. Based on the elastic expansion and contraction of the materials of the inner and outer sealing rings 31 and 32, they are fastened to the piston rod 22. The piston rod 22 deforms towards the elastic groove 37 during its extension and retraction to ensure a seal. The fitting part 36 between the inner and outer sealing rings 31 and 32 includes a concave ring groove and a protruding ring, which are fitted together inside the sealing sleeve 30. On the side, and an annular groove is also provided in the inner ring of the sealing sleeve 30, which is aligned with the mating position of the inner sealing ring 31 and the outer sealing ring 32. Under the extension and retraction of the piston rod 22, the inner sealing ring 31 and the outer sealing ring 32 are dragged to produce a certain deformation, so that the inner sealing ring 31 and the outer sealing ring 32 can deform and fit against the outer side of the piston rod 22 and the inner side of the sealing sleeve 30. Furthermore, an O-ring rubber ring 33 is also provided on the outer side of the sealing sleeve 30 to seal the air seal between the cylinder body 1 and the sealing sleeve 30.

[0026] Furthermore, based on this embodiment, the three-axis cylinder is equipped with a high-pressure air source supply for high loads to drive the piston and push plate 2. Additionally, a buffer air passage 61 and a buffer pad 62 structure are provided on the cylinder. Figure 3As shown, in use, for example, when the push plate 2 is in the retracted state, the push plate 2 is located near the cylinder body 1, and the piston is located near the lower end of the cylinder cavity 13. Although the buffer pad 62 also has air passage slots, it is also pushed by air pressure to adhere to the piston 12, which is also located below it. At this time, the air source is reversed; the push air passage 10 receives air, and the retracted air passage 11 no longer supplies air. High-pressure airflow enters from the push air passage 10, pushing the piston 12 upwards and simultaneously moving the buffer pad 62. At this time, the cylinder is in the normal exhaust phase. The buffer air passage 61 and the retracted air passage 11 on the other side of the piston 12 are simultaneously exhausting air until the buffer pad 62 is pushed by the piston 12. After the buffer pad 62 moves to the upper position, its outer side blocks the buffer air passage 61, thus blocking the exhaust of the buffer air passage 61. With the retraction passage 11 left to exhaust, the cylinder enters the buffer stroke stage. The exhaust port diameter in the cylinder chamber 13 is reduced by more than half, so the airflow can only be exhausted from the retraction passage 11. Compared with the high-pressure airflow on the other side, the reaction force generates back pressure, which causes the piston 12 to generate a reverse buffer force, causing the piston 12, which was originally driven by high pressure, to decelerate. Then, based on the fact that the retraction passage 11 is still unobstructed, it slowly moves to the end, completing the process of the push plate 2 extending. Conversely, when the retraction passage 11 is inlet, the buffer pad 62 blocks the buffer passage 61. However, based on the airflow hole groove provided on the buffer pad 62, after the high-pressure gas passes through, it pushes the piston 12 to move. At the same time, based on the air pressure thrust, the buffer pad 62 also moves downward with the piston 12. This process contacts the closure of the buffer passage 61 and restores the original retracted state of the piston rod 22.

[0027] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of this utility model and its equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A three-axis cylinder, characterized in that: The cylinder includes a cylinder body (1) and a push plate (2). The cylinder body (1) is provided with a cylinder cavity (13), a piston rod (22) and a piston component (12) fixed on the piston rod (22). The piston rod (22) is provided with a sealing retaining ring (16) and a sealing ring group (3) at one end extending into the cylinder cavity (13). The sealing ring group (3) includes a sealing sleeve (30), an inner sealing rubber ring (31) and an outer sealing rubber ring (32). The inner sealing rubber ring (31) and the outer sealing rubber ring (32) are respectively provided with an fitting part (36) and an elastic groove (37). The two are fitted together and installed inside the sealing sleeve (30) for air sealing between the piston rod (22) and the sealing sleeve (30). An O-ring (33) is also provided on the outside of the sealing sleeve (30) for sealing the air seal between the cylinder body (1) and the sealing sleeve (30).

2. A three-axis cylinder according to claim 1, characterized in that: On the cylinder body (1), based on the movement stroke of the piston (12) in the cylinder cavity (13), a propulsion air passage (10) and a retraction air passage (11) are respectively provided on both sides. Both include an air port (19) opened on the cylinder body (1), a straight air passage (44), and an oblique air passage (45) connecting the air port (19) and the cylinder cavity (13).

3. A three-axis cylinder according to claim 2, characterized in that: The cylinder body (1) also includes a buffer air passage (61) and a buffer pad (62). The buffer air passage (61) and the buffer pad (62) are located between the propulsion air passage (10) and the retraction air passage (11), and are located near the propulsion air passage (10) or the retraction air passage (11) or on both sides according to the usage requirements. The buffer pad (62) is set corresponding to the buffer air passage (61) and is used to close the buffer air passage (61) under the thrust of the piston rod (22) driving the piston (12).

4. A three-axis cylinder according to claim 2, characterized in that: The cylinder body (1) is also provided with exhaust reserved ports (43) respectively corresponding to the air ports (19). The exhaust reserved ports (43) are also provided with air seal plugs (41) and threaded lock caps (42) for sealing the exhaust reserved ports (43).

5. A three-axis cylinder according to claim 1, characterized in that: On the other side of the cylinder cavity (13), an air seal plate (15) is provided to close the opening (18) at the end of the cylinder cavity (13). The sealing ring (16) is also provided with a through hole (17) for the piston rod (22). The air seal plate (15) and the sealing ring (16) are both installed by using an inner ring groove (51) on the cylinder body (1) and a matching snap ring (52) for limiting.

6. A three-axis cylinder according to claim 1, characterized in that: The cylinder body (1) has two guide holes (14) and a cylinder cavity (13) arranged side by side, with the cylinder cavity (13) located between the two guide holes (14). The push plate (2) also has a guide rod (21) fixed opposite to the guide hole (14). The guide rod (21) and the piston rod (22) are both fixed at one end on the push plate (2) and the other end extends into the guide hole (14) and the cylinder cavity (13) respectively.

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