Spiral swing hydraulic device capable of achieving mechanical locking at any angle

Abstract

The utility model discloses a spiral swinging hydraulic device capable of being mechanically locked at any angle, which comprises a cylinder barrel, a spiral output shaft, a front end cover, a rear end cover, a piston, a disc spring and a thrust ring, the spiral output shaft is arranged in the cylinder barrel, the two ends of the spiral output shaft penetrate through the front end cover and the rear end cover respectively, the spiral output shaft further penetrates through the piston, the thrust ring and the disc spring, the spiral output shaft is provided with a piston connecting part and a boss connecting part, and a piston protruding ring protruding outwards is arranged in the middle of the piston and is connected with the inner wall of the cylinder barrel in a sealed mode. The cylinder barrel is provided with a right-handed rotation oil inlet and a left-handed rotation oil inlet which are respectively communicated with the right-handed rotation oil inlet area and the left-handed rotation oil inlet area; the disc spring is arranged between the rear end cover and the thrust ring, and the thrust ring is movably connected with the cylinder barrel without rotation. In the using process, the gear shaft can be stably stopped at a certain position for a long time and can be effectively locked, and work is safe and reliable.

Description

Technical Field

[0001] This utility model relates to the field of spiral swing cylinder technology, specifically a spiral swing hydraulic device with arbitrary angle mechanical locking. Background Technology

[0002] A helical oscillating cylinder is a special type of hydraulic cylinder that achieves rotary motion through a large helical helix angle helical pair. It belongs to the category of compact hydraulic actuators. The device adopts a double helical tooth meshing structure between the helical output shaft and the piston. The piston is driven by hydraulic pressure to generate helical compound motion, converting linear motion into rotary output of the helical output shaft. When the piston is under the action of hydraulic pressure in the rotating sleeve, the piston moves linearly along the helical output shaft and rotates at the same time. The helical output shaft with the output shaft also rotates simultaneously, thus realizing the oscillating motion. Depending on the working requirements, sometimes it is necessary for the helical oscillating cylinder to maintain its position unchanged after rotating to a certain position or for a certain period of time after the helical oscillating cylinder stops working. In this case, in order to prevent the helical oscillating cylinder from displaced under the action of external forces, gravity, or other forces, it is necessary to lock the helical oscillating cylinder. The combination of hydraulic circuit and mechanical self-locking can effectively lock the oscillating position of the helical oscillating cylinder. Summary of the Invention

[0003] The purpose of this utility model is to provide a helical swing hydraulic device with arbitrary angle mechanical locking, which achieves locking of the swing position of the helical swing cylinder through the cooperation of oil circuit and disc spring. To achieve the above objective, this utility model provides the following technical solution: A helical swing hydraulic device with arbitrary angle mechanical locking, including a cylinder, a helical output shaft, a front end cover, a rear end cover, a piston, and also including a disc spring and a thrust ring; the cylinder has a front end cover and a rear end cover respectively at both ends, which are sealed to the inner wall of the cylinder; the helical output shaft is located inside the cylinder and passes through the front end cover and the rear end cover respectively at both ends; the helical output shaft also passes through the piston, the thrust ring, and the disc spring; a sealing ring is provided at the connection between the helical output shaft and the front end cover, the rear end cover, the piston, and the thrust ring; the helical output shaft has a piston connecting part and a boss connecting part; the piston connecting part is connected to the inner side of the piston; the boss connecting part is sealed to the inner wall of the cylinder; the piston has an outwardly protruding piston ring in the middle, which is sealed to the inner wall of the cylinder. A right-hand oil inlet area is provided between the piston ring and the front end cover, and a left-hand oil inlet area is provided between the piston ring and the connecting part of the spiral output shaft boss. The cylinder is provided with a right-hand oil inlet and a left-hand oil inlet that are respectively connected to the right-hand oil inlet area and the left-hand oil inlet area. The disc spring is located between the rear end cover and the thrust ring. One side of the thrust ring is in close contact with the disc spring, and the other side is connected to the connecting part of the spiral output shaft boss through a toothed groove and a toothed engagement. Sealing rings are provided between the thrust ring and the inner wall of the cylinder and the outer surface of the spiral output shaft, respectively. A gap is provided between the two corresponding sides of the thrust ring and the connecting part of the spiral output shaft boss to form a sealing cavity. The cylinder is provided with a locking oil inlet and outlet that are connected to the sealing cavity. The thrust ring and the cylinder are connected in a non-rotating moving connection.This design for a helical oscillating cylinder improves upon the design by adding a boss connection to the helical output shaft and incorporating a thrust ring and disc spring to lock the oscillation position. When the helical output shaft needs to oscillate, pressurized oil is first injected through the locking inlet / outlet. Since the piston remains stationary, the helical output shaft also remains stationary. The pressurized oil enters the sealing cavity at one end of the thrust ring, pushing the thrust ring to compress the disc spring, disengaging the thrust ring from the teeth and grooves on the boss connection of the helical output shaft. Then, pressurized oil is injected into the right-hand or left-hand inlet area through the right-hand or left-hand inlet, causing the piston to move along the thread of the piston connection on the helical output shaft and rotate the shaft to the right or left. After pressurized oil is injected into the right-hand or left-hand inlet area, oil is discharged from the other side through the right-hand or left-hand inlet. When the helical output shaft rotates to a specified angle or returns to its original position, to maintain the helical position... As the output shaft rotates, the thrust ring moves under the force of the disc spring and discharges the oil from the sealing cavity of the thrust ring through the locked inlet and outlet oil ports. This restores the connection between the thrust ring and the toothed grooves and protrusions on the boss connection of the spiral output shaft. Since the thrust ring and the cylinder are connected without rotation, the spiral output shaft cannot rotate, thus achieving the goal of locking the swing position of the spiral swing cylinder. The sealing cavity at one end of the thrust ring is the gap between the two sides of the boss connection of the thrust ring and the spiral output shaft that are close to each other, that is, the toothed groove and protrusion mating connection. The top of the protrusion and the bottom of the toothed groove are not tightly fitted but leave a gap to form a sealing cavity. In the structure of this sealing cavity, sealing connections are set between the boss connection of the spiral output shaft and the cylinder, between the cylinder and the thrust ring, and between the thrust ring and the spiral output shaft, thus forming the sealing cavity at one end of the thrust ring. The sealing cavity normally contains a small amount of hydraulic oil, which generates pressure on the thrust ring when pressure oil is continuously injected. As a further preferred embodiment of this technical solution, the right-hand oil inlet, left-hand oil inlet, and locking oil inlet / outlet are respectively connected to a hydraulic device. The piston-driven spiral output shaft structure of this solution is a commonly used existing technology, but the locking structure is a feature of this solution used to limit the rotational angle of the spiral output shaft. In conjunction with the hydraulic device, this allows the thrust ring to unlock or lock the spiral output shaft. As a further preferred embodiment of this technical solution, the outer side of the thrust ring has an inwardly recessed sealing groove on one side and an outwardly protruding gear ring on the other side. The inner wall of the cylinder has a sealing inner wall that mates with the sealing groove and a gear groove that mates with the gear ring. In this solution, the outer side of the thrust ring and the smooth portion of the cylinder inner wall (sealing inner wall) and the spiral output shaft are all sealed together. Simultaneously, the outer side of the thrust ring also has a protruding gear ring. Multiple gears on the gear ring mate with multiple gear grooves on the cylinder inner wall, allowing the thrust ring to move linearly along the gear grooves without relative rotation with the cylinder. As a further preferred embodiment of this technical solution, the front end cover, rear end cover, and the sealing connection with the cylinder inner wall are each provided with two sealing rings.The two sealing rings in this design are used to enhance the sealing effect. As a further preferred embodiment of this technical solution, a base is provided at the bottom of the cylinder. This base is used for connecting the cylinder to other equipment or structures. This utility model has the following advantages: Through the cooperation of the oil circuit and disc spring, the swing position of the helical swing cylinder is locked; during use, the gear shaft can be stably stopped at a certain position for a long time and can be effectively locked, ensuring safe and reliable operation. It is a space-saving mechanical locking hydraulic device for a helical swing cylinder. Attached Figure Description

[0004] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0005] Figure 2 This is a schematic diagram of the external structure of the spiral output shaft of this utility model;

[0006] Figure 3 This is a side view of the thrust ring structure of this utility model;

[0007] Figure 4 This is a schematic diagram of the end face structure of the thrust ring near the boss connection part of this utility model;

[0008] Figure 5 This is a schematic cross-sectional view of the connection between the cylinder barrel and the thrust ring of this utility model.

[0009] Figure 6 This is a schematic diagram of the sealing cavity of this utility model.

[0010] In the diagram: 1. Cylinder; 2. Screw output shaft; 3. Front end cover; 4. Rear end cover; 5. Piston; 6. Disc spring; 7. Thrust ring; 8. Right-hand oil inlet area; 9. Left-hand oil inlet area; 10. Sealing cavity; 11. Right-hand oil inlet; 12. Left-hand oil inlet; 13. Locking inlet / outlet; 14. Sealing inner wall; 15. Gear groove; 16. Base; 21. Piston connection; 22. Boss connection; 71. Sealing ring groove; 72. Gear ring; 73. Raised tooth. Detailed Implementation

[0011] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0012] like Figures 1-6 As shown, this utility model provides the following technical solution:

[0013] A hydraulically adjustable helical swing device with arbitrary angle mechanical locking includes a cylinder 1, a helical output shaft 2, a front end cover 3, a rear end cover 4, and a piston 5, as well as a disc spring 6 and a thrust ring 7. The cylinder 1 has a front end cover 3 and a rear end cover 4 at both ends, which are sealed to the inner wall of the cylinder 1. The helical output shaft 2 is located inside the cylinder 1 and passes through the front end cover 3 and the rear end cover 4 at both ends. The helical output shaft 2 also passes through the piston 5, the thrust ring 7, and the disc spring 6. A sealing ring is provided at the connection between the helical output shaft 2 and the front end cover 3, the rear end cover 4, the piston 5, and the thrust ring 7. The helical output shaft 2 has a piston connecting part 21 and a boss connecting part 22. The piston connecting part 21 is connected to the inner side of the piston 5, and the boss connecting part 22 is sealed to the inner wall of the cylinder 1. The piston 5 has an outwardly protruding piston ring 51 in the middle, which is sealed to the inner wall of the cylinder 1. A right-hand oil inlet area 8 is provided between the piston ring 51 and the front end cover 3, and a left-hand oil inlet area 9 is provided between the piston ring 51 and the boss connection part 22 of the spiral output shaft 2. The cylinder 1 is provided with a right-hand oil inlet 11 and a left-hand oil inlet 12 that are respectively connected to the right-hand oil inlet area 8 and the left-hand oil inlet area 9. The disc spring 6 is provided between the rear end cover 4 and the thrust ring 7. One side of the thrust ring 7 is close to the disc spring 6, and the other side is connected to the boss connection part 22 of the spiral output shaft 2 through a tooth groove and a tooth engagement. A sealing ring is provided between the thrust ring 7 and the inner wall of the cylinder 1 and the outer surface of the spiral output shaft 2. A gap is provided between the two corresponding sides of the thrust ring 7 and the boss connection part 22 of the spiral output shaft 2 to form a sealing cavity 10. The cylinder 1 is provided with a locking oil inlet and outlet port 13 that is connected to the sealing cavity. The thrust ring 7 and the cylinder 1 are connected by a non-rotating movable connection.

[0014] The right-hand oil inlet 11, the left-hand oil inlet 12, and the locking oil inlet / outlet 13 are respectively connected to the hydraulic device.

[0015] The thrust ring 7 has an inwardly recessed sealing groove 71 on one side of its outer surface and an outwardly protruding gear ring 72 on the other side. The inner wall of the cylinder 1 has a sealing inner wall 14 that mates with the sealing groove 71 and a gear groove 15 that mates with the gear ring 72. A sealing ring is provided in the sealing groove 71. The thrust ring 7 has multiple protruding teeth 73 on its end face near the boss connection part 22.

[0016] Two sealing rings are provided at the sealing connection between the front cover 3, the rear cover 4 and the inner wall of the cylinder 1.

[0017] The bottom of cylinder 1 is provided with a base 16.

[0018] The specific working process of this utility model is as follows: When it is necessary for the spiral output shaft 2 to swing, pressurized oil is first injected into the sealing cavity 10 on the side of the thrust ring 7 through the locking oil inlet / outlet 13. Since the piston 5 is not moving at this time, the spiral output shaft 2 is also not moving. After the pressurized oil enters, it pushes the thrust ring 7 to move and compress the disc spring 6, so that the thrust ring 7 is disengaged from the tooth groove and protrusion on the boss connection part 22 of the spiral output shaft 2. Then, pressurized oil is injected into the right-hand oil inlet 8 or the left-hand oil inlet 9 through the right-hand oil inlet 11 or the left-hand oil inlet 12, so that the piston 5 begins to move along the thread of the piston connection part 21 on the spiral output shaft 2 and drives the spiral output shaft 2 to rotate right or left. After the pressurized oil is injected into the 9th chamber, the oil inlet 9 on the other side, or the oil inlet 8 on the right side, discharges oil outward through the oil inlet 11 on the right side or the oil inlet 12 on the left side. When the spiral output shaft 2 rotates to the specified angle or returns to its original position, in order to maintain the angular position of the spiral output shaft 2 and reduce the pressure of the locking oil inlet / outlet 13, the thrust ring 7 moves under the elastic force of the disc spring 6 and discharges the oil in the sealing cavity 10 of the thrust ring 7 from the locking oil inlet / outlet 13, so that the tooth groove and tooth on the boss connection part 22 of the thrust ring 7 are reconnected. Since the thrust ring 7 and the cylinder 1 are connected without rotation, the spiral output shaft 2 cannot rotate, thus achieving the goal of locking the swing position of the spiral output shaft 2.

[0019] When the helical swing cylinder needs to rotate to the right at an angle α, oil is first supplied through the locking inlet / outlet oil port 13. This compresses the disc spring 6 by the thrust ring 7, causing the axial convex teeth on the side of the thrust ring 7 to disengage from the tooth groove of the helical output shaft 2. Then, the oil pipe of the helical swing cylinder is activated (the side of the piston 5 near the boss connection part 22 is the return oil chamber, and the other side of the piston 5 away from the boss connection part 22 is the inlet oil chamber). The inlet oil pipe supplies oil to the inlet oil chamber, and the oil in the return oil chamber returns to the oil tank from the outlet oil pipe, causing the helical output shaft 2 to rotate from 0° to the required angle α. After the required angle α is reached, the pressure of the locking inlet / outlet oil port 13 is reduced. Under the thrust of the disc spring 6, the axial convex teeth on the side of the thrust ring 7 close with the tooth groove of the helical output shaft 2. The rotation of the helical output shaft 2 is prevented by the meshing of the gear ring 72 and gear groove 15 between the thrust ring 7 and the cylinder 1.

[0020] When the helical swing cylinder needs to rotate to the left by an angle α, the steps are the same as those for rotating to the right. However, the difference is that the piston 5 side near the boss connection part 22 is the oil inlet chamber, and the piston side away from the boss connection part 22 is the oil return chamber.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A helical oscillating hydraulic device with arbitrary angle mechanical locking, comprising a cylinder, a helical output shaft, a front end cover, a rear end cover, and a piston, characterized in that: It also includes disc springs and thrust rings; The cylinder is provided with a front end cover and a rear end cover at both ends, which are sealed to the inner wall of the cylinder. The spiral output shaft is located inside the cylinder and passes through the front end cover and the rear end cover at both ends. The spiral output shaft also passes through the piston, the thrust ring, and the disc spring. A sealing ring is provided at the connection between the spiral output shaft and the front end cover, the rear end cover, the piston, and the thrust ring. The spiral output shaft is provided with a piston connecting part and a boss connecting part. The piston connecting part is connected to the inner side of the piston, and the boss connecting part is sealed to the inner wall of the cylinder. The piston has an outwardly protruding piston ring in the middle and is sealed to the inner wall of the cylinder. There is a right-hand oil inlet area between the piston ring and the front end cover, and a left-hand oil inlet area between the piston ring and the connecting part of the spiral output shaft boss. The cylinder has a right-hand oil inlet and a left-hand oil inlet that are respectively connected to the right-hand oil inlet area and the left-hand oil inlet area. The disc spring is located between the rear end cover and the thrust ring. One side of the thrust ring is in close contact with the disc spring, and the other side is connected to the screw output shaft boss through a toothed groove and a toothed engagement. Sealing rings are provided between the thrust ring and the inner wall of the cylinder and the outer surface of the screw output shaft, respectively. A gap is provided between the two corresponding sides of the thrust ring and the screw output shaft boss to form a sealing cavity. The cylinder is provided with a locking oil inlet and outlet port that communicates with the sealing cavity. The thrust ring and the cylinder are connected in a non-rotating moving connection.

2. The helical swing hydraulic device with arbitrary angle mechanical locking according to claim 1, characterized in that: The right-hand oil inlet, left-hand oil inlet, and locking oil inlet / outlet are respectively connected to the hydraulic device.

3. The helical swing hydraulic device with arbitrary angle mechanical locking according to claim 1, characterized in that: The thrust ring has an inwardly recessed sealing groove on one side and an outwardly protruding gear ring on the other side. The cylinder inner wall has a sealing inner wall that mates with the sealing groove and a gear groove that mates with the gear ring.

4. The helical swing hydraulic device with arbitrary angle mechanical locking according to claim 1, characterized in that: The front cover, rear cover and cylinder inner wall are respectively provided with two sealing rings at the sealing connection.

5. The helical swing hydraulic device with arbitrary angle mechanical locking according to claim 1, characterized in that: The cylinder has a base at its bottom.

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