Dual rod hydraulic drive synchronous cylinder

Abstract

This application relates to a dual-rod hydraulically driven synchronous cylinder, belonging to the field of synchronous cylinder technology. It includes a hydraulic motor and a cylinder body. The key feature is that a right-angle reducer is provided on one side of the hydraulic motor. One end of the right-angle reducer is connected to a transmission assembly, and the other end is fixedly connected to a sleeve. A commutator is provided at the end of the transmission assembly and the sleeve furthest from the right-angle reducer. The commutators are located within their respective cylinder bodies. A T-shaped lead screw is provided within the cylinder body, and a piston assembly is sleeved on the outside of the T-shaped lead screw. When the T-shaped lead screw rotates, the piston assembly synchronously extends and retracts in a linear reciprocating motion. This application features a large output push-pull force, achieving synchronous extension and retraction on both sides, and bidirectional equal-force and equal-speed push-pull.

Description

Technical Field

[0001] This application relates to the field of drive synchronization cylinder technology, and in particular to a double-rod hydraulic drive synchronization cylinder. Background Technology

[0002] In modern industry, linear actuators, as core actuators for realizing linear reciprocating motion, play a crucial role in numerous pieces of equipment. As industrial equipment develops towards higher precision, energy efficiency, and compactness, researchers are advancing the study of linear actuators towards deeper levels of technology, such as bilateral synchronous extension and retraction, and bidirectional equal-force and equal-speed push-pull.

[0003] Existing single-rod linear actuators typically lack dual-side synchronous drive capability. Some schemes employ independent drive units to achieve dual-side drive, which suffer from issues such as susceptibility to control signal or load fluctuations, operational stuttering, and off-center loading, making them unsuitable for the needs of compact equipment.

[0004] Currently, electrically controlled linear actuators have shown significant advantages in many fields. However, in engineering machinery applications requiring high synchronization stability and low speed and heavy load, some electrically driven linear actuator solutions are limited by the output torque of the drive unit and cannot simultaneously meet the bidirectional output requirements of large thrust and large tension. Traditional hydraulic cylinder synchronization solutions driven directly by pressure oil also suffer from problems such as reliance on flow distribution control, easy leakage, and insufficient synchronization stability. Summary of the Invention

[0005] To address the issues of operational stalling and uneven loading in existing technologies, and to meet the dual-side synchronous drive requirements of high synchronization stability and high thrust and tension in low-speed heavy-load engineering machinery scenarios, this application provides a dual-rod hydraulic drive synchronous cylinder.

[0006] This application provides a dual-rod hydraulically driven synchronous cylinder, which adopts the following technical solution: A dual-rod hydraulically driven synchronous cylinder includes a hydraulic motor and a cylinder body. The hydraulic motor has a right-angle reducer on one side, with a transmission assembly connected to one end of the reducer and a sleeve fixedly connected to the other end. A commutator is provided at the end of both the transmission assembly and the sleeve furthest from the right-angle reducer. The commutators are located within the corresponding cylinder bodies. A T-shaped lead screw is provided within the cylinder body, and a piston assembly is sleeved on the outside of the T-shaped lead screw. When the T-shaped lead screw rotates, the piston assembly synchronously extends and retracts, performing a linear reciprocating motion.

[0007] By adopting the above technical solution, the right-angle reducer, transmission assembly, commutator, and cylinder block operate coaxially and synchronously. The hydraulic motor provides power to drive the right-angle reducer to rotate. The right-angle reducer transmits power synchronously to the commutators on both sides. The commutators on both sides synchronously drive the T-shaped lead screw to rotate. The T-shaped lead screw and the piston assembly are connected by threaded transmission, enabling the piston assembly to achieve synchronous extension and retraction, and bidirectional equal force and equal speed push and pull linear motion.

[0008] Optionally, the right-angle reducer includes a housing, with output shafts at both ends of the housing, one end of which extends out of the housing.

[0009] By adopting the above technical solution, the right-angle reducer includes a housing, and output shafts are provided at both ends of the housing. The right-angle reducer is connected to other structures through the output shafts to transmit power and drive the other structures to rotate.

[0010] Optionally, the transmission assembly includes a connecting rod, with couplings at both ends. One end of the connecting rod is connected to the output shaft via a coupling, and the other end is connected to the corresponding side commutator via a coupling.

[0011] By adopting the above technical solution, one end of the connecting rod is connected to the output shaft of the right-angle reducer via a coupling, and the other end is connected to the corresponding side commutator via a coupling. The power of the right-angle reducer is transmitted to the connecting rod, the output shaft drives the connecting rod to rotate, and the connecting rod drives the corresponding side commutator to rotate, continuing to transmit power.

[0012] Optionally, the piston assembly includes a piston that is threadedly engaged with a T-shaped lead screw. A piston rod is provided on one side of the piston, and the piston and piston rod are fixedly connected. The piston is located inside the cylinder, and the piston rod is partially located inside the cylinder. A connector is provided at the end of the piston rod away from the piston.

[0013] By adopting the above technical solution, the piston and piston rod are fixedly connected by threads, and the piston and piston rod move synchronously as a whole. The piston rod part is located in the cylinder body. When the T-shaped screw rotates, the T-shaped screw drives the piston, and the piston drives the piston rod. The piston rod extends or retracts into the cylinder body to make linear reciprocating motion.

[0014] Optionally, the commutator is provided with a bearing block on the side near the T-screw, and the commutator is connected to the T-screw on the corresponding side for transmission.

[0015] By adopting the above technical solution, the commutator is connected to the T-shaped lead screw on the corresponding side. The commutator drives the T-shaped lead screw to rotate and transmits power to the T-shaped lead screw. The bearing block fixes the position of the commutator and the T-shaped lead screw so that they do not deviate during rotation.

[0016] Optionally, the output shaft of the housing near the end of the sleeve passes through the sleeve and is connected to the corresponding side commutator for transmission.

[0017] By adopting the above technical solution, the output shaft of the housing near the sleeve end is connected to the corresponding commutator. The right-angle reducer transmits power to the commutator, and the output shaft drives the commutator to rotate. The sleeve fixes the position of the right-angle reducer and the commutator, ensuring that the commutator does not shift position from the right-angle reducer when rotating.

[0018] In summary, this application includes at least one of the following beneficial technical effects: This application uses a single hydraulic motor for drive. The hydraulic motor has a large output torque, which can meet the needs of large thrust and large pulling force in low-speed heavy-duty engineering machinery scenarios. This application uses a T-shaped lead screw inside the cylinder to drive the piston, and the piston drives the two sides of the piston rod to mechanically synchronize, with small synchronization error, no off-center load, and no jamming; This application features an integrated coaxial structure. With the assistance of structures such as sleeves and protective covers, the right-angle reducer is coaxial and synchronized with the connecting rod and commutator, eliminating the need for complex algorithms for dual-cylinder synchronization and reducing maintenance costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 yes Figure 1 Side view; Figure 3 It is along Figure 2 Schematic diagram of the cross section of line AA; Figure 4 yes Figure 3 Enlarged diagram of part B.

[0020] Explanation of reference numerals in the attached drawings: 1. Hydraulic motor; 2. Cylinder block; 3. Right-angle reducer; 4. Sleeve; 5. Commutator; 6. T-screw; 7. Housing; 8. Output shaft; 9. Connecting rod; 10. Coupling; 11. Piston; 12. Piston rod; 13. Connector; 14. Bearing block; 15. Drive shaft; 16. Bearing seat; 17. Protective cover. Detailed Implementation

[0021] The present application will be further described in detail below with reference to all the accompanying drawings.

[0022] This application discloses a dual-rod hydraulically driven synchronous cylinder.

[0023] Reference Figure 1 , Figure 3 and Figure 4A dual-output hydraulically driven synchronous cylinder includes a hydraulic motor 1 and a cylinder body 2. The hydraulic motor 1 is the power source of the entire device, driven by hydraulic oil to generate rotational power and output high torque. The hydraulic motor 1 is located above a right-angle reducer 3. The hydraulic motor 1 has a drive shaft 15, which is directly inserted into the right-angle reducer 3. The right-angle reducer 3 contains a bearing housing 16 to support the hydraulic motor 1 and ensure that the two rotate coaxially. The right-angle reducer 3 includes a housing 7, inside which is installed a pair of meshing bevel gears responsible for changing the power of the hydraulic motor 1 from vertical rotation to horizontal rotation, thus reducing the power and converting it into a low-speed, high-torque output suitable for the T-type lead screw 6. Output shafts 8 are provided at both ends of the housing 7, and the power is transmitted to the output shafts 8, driving them to rotate. One end of the output shaft 8 extends out of the housing 7.

[0024] Reference Figure 1 and Figure 3 The right-angle reducer 3 is driven by a connecting rod 9 at one end and fixedly connected to a sleeve 4 at the other end. Both ends of the connecting rod 9 are equipped with couplings 10, and a protective cover 17 is provided on the outside of the connecting rod 9. The protective cover 17 protects the connecting rod 9 and ensures that the connecting rod 9 does not deviate when rotating. One end of the connecting rod 9 is driven by the output shaft 8 through the coupling 10. The output shaft 8 transmits power to the connecting rod 9, causing the connecting rod 9 to rotate. The other end of the connecting rod 9 is driven by the corresponding commutator 5 through the coupling 10. The connecting rod 9 transmits power to the commutator 5 on that side, causing the commutator 5 to rotate. The output shaft 8 of the housing 7 near the sleeve 4 passes through the sleeve 4 and is driven by the corresponding commutator 5. The sleeve 4 serves to fix the position of the right-angle reducer 3 and the corresponding commutator 5, ensuring that the rotation of the commutator 5 on that side is synchronized with that of the connecting rod 9. Thus, the commutator 5 on the sleeve 4 side and the commutator 5 on the connecting rod 9 side rotate synchronously, coaxially, with equal force and speed, resulting in a compact and stable structure.

[0025] Reference Figure 1 and Figure 3 The commutator 5 is located in the corresponding cylinder 2, that is, the two commutator 5 are located in the two cylinder 2. The cylinder 2 is equipped with a T-shaped lead screw 6. The commutator 5 is equipped with a bearing block 14 on the side near the T-shaped lead screw 6. The commutator 5 is connected to the corresponding T-shaped lead screw 6 for transmission. The bearing block 14 plays the role of fixing the position of the commutator 5 and the T-shaped lead screw 6, so that the T-shaped lead screw 6 can rotate in place without deviation. A driven bevel gear is installed inside the commutator 5. One end of the T-shaped lead screw 6 is rigidly connected to the driven bevel gear. The driven bevel gear drives the T-shaped lead screw 6 to rotate synchronously. The commutator 5 transmits power to the T-shaped lead screw 6.

[0026] Reference Figure 1 and Figure 3A piston 11 is fitted on the outer side of the T-shaped lead screw 6. The inner wall of the piston 11 is threaded, and the thread meshes with the T-shaped lead screw 6. The piston 11 and the T-shaped lead screw 6 are connected by threaded transmission. The piston 11 is restricted by the inner wall of the cylinder 2 and cannot rotate with the T-shaped lead screw 6. A piston rod 12 is provided on one side of the piston 11. The piston 11 and the piston rod 12 are threadedly fixedly connected. The piston 11 is located inside the cylinder 2, and part of the piston rod 12 is located inside the cylinder 2. A connector 13 is provided at the end of the piston rod 12 away from the piston 11. When the T-shaped lead screw 6 rotates, the piston 11 moves linearly along the axis of the T-shaped lead screw 6. The piston 11 then drives the piston rod 12 to move synchronously in a linear reciprocating motion to realize power output.

[0027] The implementation principle of a dual-outlet hydraulically driven synchronous cylinder in this application embodiment is as follows: This application uses a hydraulic motor 1 to provide rotational power and output a large push-pull force. The torque is transmitted through a right-angle reducer 3, connecting rod 9, and commutator 5 to drive the T-shaped lead screw 6 to rotate. The rotational motion of the T-shaped lead screw 6 is converted into the linear reciprocating motion of the piston 11 and piston rod 12, realizing the effect of synchronous extension and contraction on both sides and equal push-pull force and equal speed in both directions. With the assistance of the sleeve 4, protective cover 17 and other structures, the two cylinders are integrated and coaxial, with a compact structure, reduced installation space, and low maintenance cost. The piston 11 and piston rod 12 are mechanically synchronized, with no off-center load, no jamming, and high synchronization stability.

[0028] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A double rod hydraulic drive synchronous cylinder comprising a hydraulic motor (1) and a cylinder body (2), characterized in that: The hydraulic motor (1) is provided with a right-angle reducer (3) on one side. One end of the right-angle reducer (3) is connected to a transmission assembly, and the other end is fixedly connected to a sleeve (4). The transmission assembly and the sleeve (4) are both provided with a commutator (5) at the end away from the right-angle reducer (3). The commutator (5) is located in the corresponding cylinder (2). The cylinder (2) is provided with a T-shaped lead screw (6). A piston assembly is sleeved on the outside of the T-shaped lead screw (6). When the T-shaped lead screw (6) rotates, the piston assembly synchronously extends and retracts to make linear reciprocating motion.

2. A dual rod hydraulic drive synchronous cylinder according to claim 1, characterized in that: The right-angle reducer (3) includes a housing (7), and output shafts (8) are provided at both ends of the housing (7), with one end of the output shaft (8) extending out of the housing (7).

3. A dual rod hydraulic drive synchronous cylinder according to claim 2, characterized in that: The transmission assembly includes a connecting rod (9), with couplings (10) at both ends of the connecting rod (9). One end of the connecting rod (9) is connected to the output shaft (8) via the coupling (10), and the other end is connected to the corresponding side commutator (5) via the coupling (10).

4. The dual rod hydraulic drive synchronous cylinder of claim 1, wherein: The piston assembly includes a piston (11), which is threadedly engaged with a T-shaped lead screw (6). A piston rod (12) is provided on one side of the piston (11), and the piston (11) and piston rod (12) are fixedly connected. The piston (11) is located inside the cylinder (2), and part of the piston rod (12) is located inside the cylinder (2). A connector (13) is provided at the end of the piston rod (12) away from the piston (11).

5. The dual rod hydraulic drive synchronous cylinder of claim 1, wherein: The commutator (5) has a bearing block (14) on the side near the T-shaped lead screw (6), and the commutator (5) is connected to the T-shaped lead screw (6) on the corresponding side for transmission.

6. A dual rod hydraulic drive synchronous cylinder according to claim 2, characterized in that: The output shaft (8) of the housing (7) near the end of the sleeve (4) passes through the sleeve (4) and is connected to the corresponding side commutator (5) for transmission.

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