Swing cylinder

Abstract

The utility model provides a swing oil cylinder, including oil cylinder body, the inner shaft of oil cylinder body built -in and the intermediate sleeve of activity in the inner shaft, the outer peripheral wall of inner shaft is equipped with the first gear ring, the inner peripheral wall of intermediate sleeve is equipped with the first gear ring of first gear ring interlock, the outer peripheral wall of intermediate sleeve is equipped with the second gear ring, the inner peripheral wall of oil cylinder body is equipped with the second gear ring of second gear ring interlock, the intermediate sleeve is in the oil cylinder body, and the intermediate sleeve divides oil cylinder body into first oil chamber and second oil chamber, one end of intermediate sleeve is equipped with the contact, and the contact sets up the guide ring inward, and one end of oil cylinder body is equipped with at least one limit piece, and the piston rod is equipped on the limit piece, and the guide head matched with guide ring is equipped on the piston rod, and the guide head is in the guide ring, when the intermediate sleeve swings and displaces with the pressure change of first oil chamber and second oil chamber, the guide head is always located in the guide ring, ensures the piston rod steady movement, avoids the deviation.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinders, and in particular to a swing hydraulic cylinder. Background Technology

[0002] A oscillating cylinder, as a special hydraulic actuator, primarily functions to achieve reciprocating oscillating motion. Specifically, while a piston-type actuator converts the linear motion of a piston into oscillation of a rotating shaft via a mechanical structure such as a rack and pinion, a oscillating cylinder provides efficient oscillating power within a limited space through the input and output of hydraulic oil.

[0003] The function of a swing cylinder is to achieve swing motion in a confined space, transmit power and torque, and achieve precise angle adjustment through hydraulic system control. It offers smooth transmission, high load-bearing capacity, and simplifies the structure and reduces the size and weight of equipment compared to electric motors and mechanical transmissions. It is used in fields such as engineering machinery, industrial automation, shipbuilding, and aerospace.

[0004] Although existing swing cylinders are widely used, in actual operation, especially when subjected to large loads or high-speed swing, they are prone to swing instability and decreased accuracy, which affects work efficiency. In severe cases, the valve core cannot be corrected, leading to the scrapping of the cylinder.

[0005] To address this issue, a swing cylinder is proposed. Utility Model Content

[0006] In order to overcome the shortcomings of existing technologies where high-speed oscillation is prone to instability, this utility model provides an oscillating hydraulic cylinder.

[0007] This utility model is achieved using the following technical solution:

[0008] A swing cylinder includes a cylinder body, an inner shaft built into the cylinder body, and an intermediate sleeve movable on the inner shaft. The outer peripheral wall of the inner shaft is provided with a first toothed ring, the inner peripheral wall of the intermediate sleeve is provided with a first toothed ring that meshes with the first toothed ring, the outer peripheral wall of the intermediate sleeve is provided with a second toothed ring, and the inner peripheral wall of the cylinder body is provided with a second toothed ring that meshes with the second toothed ring. The intermediate sleeve is movable within the cylinder body and divides the cylinder body into a first oil chamber and a second oil chamber.

[0009] One end of the intermediate sleeve is provided with a contact, and a guide ring is provided inward from the contact. One end of the cylinder body is provided with at least one limiting member, and a piston rod is provided on the limiting member. A guide head matching the guide ring is provided on the piston rod, and the guide head moves within the guide ring.

[0010] As a preferred embodiment of this utility model, multiple damping springs are evenly distributed on the limiting member, and the multiple damping springs are connected to a contact plate, with the contact plate and the contact being a matching structure.

[0011] As a preferred embodiment of this utility model, the cylinder body is provided with an installation port inside, one end of the inner shaft is provided with a connector that matches the installation port, and the end of the inner shaft away from the connector is provided with a cover, which is fixed to the cylinder body by bolts.

[0012] As a preferred embodiment of this utility model, the mounting port is equipped with a first bearing, which is located in the first oil chamber, and the inner wall of the cylinder body is provided with a second bearing, which is located in the second oil chamber.

[0013] As a preferred embodiment of this utility model, the cylinder body is provided with a first oil port, which communicates with the first oil chamber, and the cylinder body is provided with a second oil port, which communicates with the second oil chamber.

[0014] As a preferred embodiment of this utility model, a first annular opening is provided on the outer peripheral wall of the intermediate sleeve, and a second annular opening is provided on the inner peripheral wall of the intermediate sleeve. A first sealing ring is built into the first annular opening, and a second sealing ring is built into the second annular opening.

[0015] As a preferred embodiment of this utility model, the cylinder body is provided with a third ring opening near the inner end of the cover, and a third sealing rubber ring is built into the third ring opening.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. By providing a guide ring on the intermediate sleeve, when the oil pressure in the first oil chamber increases and the pressure in the second oil chamber decreases, the first gear ring and the second gear ring mesh with the first gear ring and the second gear ring respectively to realize the swing of the intermediate sleeve. At the same time as the intermediate sleeve swings, the guide ring will slide on the guide head on the piston rod to ensure stability and prevent the intermediate sleeve from deviating during the swing.

[0018] 2. When the pressure in the first oil chamber decreases and the pressure in the second oil chamber increases, the gear ring and gear ring mesh in opposite directions, the intermediate sleeve swings in the opposite direction, and the guide ring continues to slide along the guide head to ensure accurate swing. When the peak value is reached, the contact at the end of the intermediate sleeve contacts the contact plate, the damping spring is compressed, and the impact force is reduced. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of the present invention;

[0020] Figure 2 This is an exploded sectional view of the present invention;

[0021] Figure 3 This is a sectional view of the cylinder body of this utility model;

[0022] Figure 4 This is a structural diagram of the inner shaft of this utility model;

[0023] Figure 5 This is a structural diagram of the intermediate sleeve of this utility model;

[0024] Figure 6 This is a cross-sectional view of the first and second oil chambers of this utility model;

[0025] In the diagram: 1. Cylinder body; 11. First oil chamber; 12. Second oil chamber; 13. First oil port; 14. Second oil port; 15. Mounting port; 16. First bearing; 17. Second gear ring; 2. Cover; 21. Bolt; 3. Inner shaft; 31. First gear ring; 32. Connecting joint; 33. Second bearing; 4. Intermediate sleeve; 41. First gear ring; 42. Contact; 43. Guide ring; 44. Second gear ring; 5. Limiting component; 51. Damping spring; 52. Contact plate; 53. Piston rod; 54. Guide head; 6. First ring opening; 61. First sealing ring; 62. Second ring opening; 63. Second sealing ring; 64. Third ring opening; 65. Third sealing ring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0027] Example:

[0028] Please see Figures 1-6 A swing cylinder includes a cylinder body 1, an inner shaft 3 built into the cylinder body 1, and an intermediate sleeve 4 movable on the inner shaft 3. The outer peripheral wall of the inner shaft 3 is provided with a first toothed ring 31, the inner peripheral wall of the intermediate sleeve 4 is provided with a first toothed ring 41 that meshes with the first toothed ring 31, the outer peripheral wall of the intermediate sleeve 4 is provided with a second toothed ring 44, and the inner peripheral wall of the cylinder body 1 is provided with a second toothed ring 17 that meshes with the second toothed ring 44. The intermediate sleeve 4 is movable inside the cylinder body 1 and divides the cylinder body 1 into a first oil chamber 11 and a second oil chamber 12.

[0029] In this embodiment, the cylinder body 1 has an inner shaft 3 built inside, one end of which is connected to an external device. A first gear ring 31 is provided on the inner and outer peripheral walls, and a first gear ring 41 is provided on the inner peripheral wall of the intermediate sleeve 4, meshing with the first gear ring 31 to achieve smooth sliding of the intermediate sleeve 4 on the inner shaft 3. A second gear ring 44 is provided on the outer peripheral wall of the intermediate sleeve 4, and a second gear ring 17 is provided on the inner peripheral wall of the cylinder body 1 near the middle position. The second gear ring 44 meshes with the second gear ring 17 to ensure that the intermediate sleeve 4... The cylinder body 1 operates stably. The inner shaft 3 is connected to the intermediate sleeve 4 through the first gear ring 31. The intermediate sleeve 4 is fixed to the cylinder body 1 through the second gear ring 44. The intermediate sleeve 4 is located inside the cylinder body 1. The first gear ring 31 and the second gear ring 44 mesh with the first gear ring 41 and the second gear ring 17 respectively to achieve swing motion. The intermediate sleeve 4 divides the oil chamber inside the cylinder body 1 into the first oil chamber 11 and the second oil chamber 12. The first oil chamber 11 and the second oil chamber 12 are independent of each other and are separated by the intermediate sleeve 4.

[0030] One end of the intermediate sleeve 4 is provided with a contact 42, and a guide ring 43 is provided inwardly on the contact 42. One end of the cylinder body 1 is provided with at least one limiting member 5, and a piston rod 53 is provided on the limiting member 5. A guide head 54 matching the guide ring 43 is provided on the piston rod 53, and the guide head 54 moves within the guide ring 43.

[0031] In this embodiment, a contact 42 is provided at one end of the intermediate sleeve 4, and a guide ring 43 extends from the contact 42 into the intermediate sleeve 4. At least one limiting member 5 is provided at one end of the cylinder body 1, and the limiting member 5 and the contact 42 are located in the same oil chamber. A piston rod 53 is installed on the limiting member 5, and a guide head 54 is provided at the front end of the piston rod 53. The guide head 54 and the guide ring 43 are in sliding fit, and the guide head 54 at the front end of the piston rod 53 extends into the guide ring 43. When the intermediate sleeve 4 swings and displaces due to the pressure change of the first oil chamber 11 and the second oil chamber 12, the guide head 54 is always located in the guide ring 43 to ensure the stable movement of the piston rod 53 and avoid deviation.

[0032] Specifically, multiple damping springs 51 are evenly distributed on the limiting member 5, and the multiple damping springs 51 are connected to a contact plate 52. The contact plate 52 and the contact 42 are a matching structure.

[0033] In this embodiment, multiple damping springs 51 are evenly distributed on the limiting member 5. The multiple damping springs 51 are connected to the contact plate 52. When the swing displacement of the intermediate sleeve 4 reaches the peak value, the contact 42 contacts the contact plate 52, and the damping springs 51 are compressed to reduce the impact force brought by the intermediate sleeve 4.

[0034] Specifically, the cylinder body 1 has an installation port 15 inside, and one end of the inner shaft 3 is provided with a connector 32 that matches the installation port 15. The end of the inner shaft 3 away from the connector 32 is provided with a cover 2, and the cover 2 is fixed to the cylinder body 1 by bolts 21.

[0035] In this embodiment, the cylinder body 1 has an inwardly opening installation port 15 at one end, and an inner shaft 3 has a connector 32 at one end. The connector 32 and the installation port 15 are in an assembly relationship. The inner shaft 3 has a cover 2 at the other end, and a bolt 21 is provided on the cover 2. The bolt 21 is used to fix the cover 2.

[0036] Specifically, the mounting port 15 has a first bearing 16 built in, and the first bearing 16 is located in the first oil chamber 11. The inner wall of the cylinder body 1 is provided with a second bearing 33, and the second bearing 33 is located in the second oil chamber 12.

[0037] In this embodiment, the mounting port 15 houses a first bearing 16, and the cylinder body 1 houses a second bearing 33. The first bearing 16 is located in the first oil chamber 11, and the second bearing 33 is located in the second oil chamber 12. The first bearing 16 and the second bearing 33 respectively support the two ends of the inner shaft 3.

[0038] Specifically, the cylinder body 1 is provided with a first oil port 13, which communicates with the first oil chamber 11, and the cylinder body 1 is provided with a second oil port 14, which communicates with the second oil chamber 12.

[0039] In this embodiment, the cylinder body 1 is provided with a first oil port 13 and a second oil port 14. The first oil port 13 and the second oil port 14 are independent of each other. The first oil port 13 passes through the cylinder body 1 and is connected to the first oil chamber 11, and the second oil port 14 passes through the cylinder body 1 and is connected to the second oil chamber 12.

[0040] Specifically, a first annular opening 6 is provided on the outer peripheral wall of the intermediate sleeve 4, and a second annular opening 62 is provided on the inner peripheral wall of the intermediate sleeve 4. A first sealing ring 61 is built into the first annular opening 6, and a second sealing ring 63 is built into the second annular opening 62.

[0041] In this embodiment, a first annular opening 6 is provided on the outer peripheral wall of the intermediate sleeve 4, and a first sealing ring 61 is built in it. A second annular opening 62 is provided on the inner peripheral wall, and a second sealing ring 63 is built in it. The first sealing ring 61 and the second sealing ring 63 are used to ensure the sealing between the first oil chamber 11 and the second oil chamber 12 to prevent oil leakage.

[0042] Specifically, the cylinder body 1 has a third annular opening 64 at one inner end near the cover 2, and a third sealing ring 65 is built into the third annular opening 64.

[0043] In this embodiment, a third annular opening 64 is provided inside the cylinder body 1. The third annular opening 64 is located near the end of the cover 2. A third sealing ring 65 is built into the third annular opening 64 to prevent oil leakage from the second oil chamber 12.

[0044] The principle of this utility model is as follows: the inner shaft 3 is connected to the intermediate sleeve 4 through the first gear ring 31, and the intermediate sleeve 4 is fixed to the cylinder body 1 through the second gear ring 44. When the oil in the second oil chamber 12 enters, the intermediate sleeve 4 swings and drives the inner shaft 3 to rotate. The oil pressure in the first oil chamber 11 pushes the intermediate sleeve 4 to swing. When the intermediate sleeve 4 swings, the first gear ring 41 meshes with the first gear ring 31, and the second gear ring 17 meshes with the second gear ring 44. The swing angle of the intermediate sleeve 4 precisely controls the rotation of the inner shaft 3. When the intermediate sleeve 4 rotates, the guide head 54 is always located inside the guide ring 43, ensuring the stable movement of the piston rod 53 and avoiding deviation, thus achieving efficient and stable operation.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A swing cylinder, comprising a cylinder body (1), an inner shaft (3) built into the cylinder body (1), and an intermediate sleeve (4) movable on the inner shaft (3), characterized in that: The inner shaft (3) has a first toothed ring (31) on its outer peripheral wall, the intermediate sleeve (4) has a first toothed ring (41) that meshes with the first toothed ring (31) on its inner peripheral wall, the intermediate sleeve (4) has a second toothed ring (44) on its outer peripheral wall, the cylinder body (1) has a second toothed ring (17) that meshes with the second toothed ring (44) on its inner peripheral wall, the intermediate sleeve (4) moves within the cylinder body (1), and the intermediate sleeve (4) divides the cylinder body (1) into a first oil chamber (11) and a second oil chamber (12); One end of the intermediate sleeve (4) is provided with a contact (42), and a guide ring (43) is provided inward on the contact (42). One end of the cylinder body (1) is provided with at least one limiting member (5), and a piston rod (53) is provided on the limiting member (5). A guide head (54) matching the guide ring (43) is provided on the piston rod (53), and the guide head (54) moves within the guide ring (43).

2. The swing cylinder according to claim 1, characterized in that: Multiple damping springs (51) are evenly distributed on the limiting member (5), and the multiple damping springs (51) are connected to a contact plate (52). The contact plate (52) and the contact (42) are a matching structure.

3. A swing cylinder according to claim 2, characterized in that: The cylinder body (1) has an installation port (15) inside. One end of the inner shaft (3) is provided with a connector (32) that matches the installation port (15). The end of the inner shaft (3) away from the connector (32) is provided with a cover (2). The cover (2) is fixed to the cylinder body (1) by bolts (21).

4. A swing cylinder according to claim 3, characterized in that: The mounting port (15) has a first bearing (16) inside, and the first bearing (16) is located in the first oil chamber (11). The inner wall of the cylinder body (1) is provided with a second bearing (33), and the second bearing (33) is located in the second oil chamber (12).

5. A swing cylinder according to claim 4, characterized in that: The cylinder body (1) is provided with a first oil port (13), which is connected to the first oil chamber (11). The cylinder body (1) is provided with a second oil port (14), which is connected to the second oil chamber (12).

6. A swing cylinder according to claim 5, characterized in that: The intermediate sleeve (4) has a first annular opening (6) on its outer peripheral wall and a second annular opening (62) on its inner peripheral wall. The first annular opening (6) contains a first sealing ring (61) and the second annular opening (62) contains a second sealing ring (63).

7. A swing cylinder according to claim 1, characterized in that: The cylinder body (1) has a third ring opening (64) at one inner end near the cover (2), and a third sealing ring (65) is built into the third ring opening (64).

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