Integrated electro-hydraulic actuating mechanism

Abstract

An oil pump unit comprises an oil pump seat and an oil pump, one side of the oil pump seat is connected with an oil tank, the oil pump is located in the oil tank, the other side of the oil pump seat is connected with a motor, and an oil pump oil way hole and a first threading hole are formed in the oil pump seat; the oil cylinder unit comprises an oil cylinder seat and an oil cylinder, one side of the oil cylinder seat is connected with the electrical control box, and an oil cylinder oil way hole and a second threading hole are formed in the oil cylinder seat; the oil pump seat and the oil cylinder seat are fixed through bolts, so that the oil pump oil way hole is communicated with the oil cylinder oil way hole, and the first threading hole is communicated with the second threading hole; a piston rod in the oil cylinder is provided with a rack, a driven gear is arranged in the oil cylinder seat, the lower end of a gear shaft of the driven gear is connected with the valve rod, the upper end of the gear shaft of the driven gear is provided with a first bevel gear, and the first bevel gear is meshed with a second bevel gear arranged on the valve position indicating rod. The electro-hydraulic actuating mechanism is free of external oil pipes and cables, hydraulic connection is reduced, and the leakage risk is reduced; and vertical valve position indication is adopted, and the overall layout is optimized.

Description

Technical Field

[0001] The utility model belongs to the technical field of electro-hydraulic actuators, and in particular relates to an integrated electro-hydraulic actuator. Background Art

[0002] The electro-hydraulic actuator is a power unit integrated with a cylinder unit, an oil pump unit, an electrical unit, and a valve position indicating unit. It is a mechanism that converts electrical energy into hydraulic energy and realizes mechanical movement through hydraulic pressure. It has the advantages of large stroke, high sensitivity, and high control accuracy, and is widely used in various industrial valves.

[0003] At present, the cylinder unit, oil pump unit, electrical unit and valve position indicating unit of the traditional electro-hydraulic actuator need to respectively set the electrical part and the hydraulic oil circuit on the mounting plate, the cylinder unit and the oil pump unit need to be connected by an external oil pipe, and the oil pump unit and the electrical unit and the valve position indicating unit need to be connected by external cables. However, since the hydraulic connections between the cylinder unit, the oil pump unit and the mounting plate all require high-pressure seals, when the electro-hydraulic actuator is hit by the outside world, it is easy to cause the external cables to be damaged, causing the electro-hydraulic actuator to malfunction, and the external oil pipe to rupture, causing oil leakage; at the same time, the valve position indicating unit is usually installed separately on the mounting plate, resulting in a larger size of the electro-hydraulic actuator. Summary of the invention

[0004] The purpose of the utility model is to provide an integrated electro-hydraulic actuator to address the deficiencies of the prior art. The electro-hydraulic actuator has no external oil pipes or cables, adopts an integrated cylinder body, reduces hydraulic connections, and reduces the risk of leakage; at the same time, it adopts a vertical valve position indication to optimize the overall layout.

[0005] The purpose of the utility model is achieved in this way:

[0006] An integrated electro-hydraulic actuator comprises an oil pump unit and an oil cylinder unit, wherein the oil pump unit comprises an oil pump seat, an oil pump and a motor, one side of the oil pump seat is fixedly connected to an oil tank, the oil pump is located in the oil tank, the other side of the oil pump seat is fixedly connected to the motor, the motor shaft of the motor is connected to the oil pump shaft of the oil pump, an oil pump oil passage hole and a first threading hole are arranged in the oil pump seat; the cylinder unit comprises an oil cylinder seat and an oil cylinder, the oil cylinder seat and the oil cylinder are an integrated structure, one side of the oil cylinder seat is fixedly connected to an electrical control box, and an oil cylinder oil passage hole and a first threading hole are arranged in the oil cylinder seat The oil pump seat and the oil cylinder seat are fixedly connected by bolts, so that the oil pump oil passage hole is connected to the oil cylinder oil passage hole, the first threading hole is connected to the second threading hole, a rack is arranged on the piston rod in the oil cylinder cavity, a driven gear is arranged in the cavity of the oil cylinder seat, the driven gear is meshed with the rack, the lower end of the gear shaft of the driven gear is connected to the valve stem, and the upper end is arranged with a first bevel gear, the first bevel gear is meshed with the second bevel gear arranged on the valve position indicating rod, and the other side of the valve position indicating rod extends into the electrical control box to connect the valve position indicating block.

[0007] The gear shaft and the valve position indicating rod are arranged vertically.

[0008] The valve position indicating rod is supported in the oil cylinder seat through a bearing.

[0009] Equivalent oil connection ports are arranged on both sides of the oil cylinder, and quick-change joints are installed on the equivalent oil connection ports for manual operation with an external oil source in emergency situations.

[0010] An electrical interface is arranged on the side of the oil cylinder seat, and the electrical interface is communicated with the second threading hole.

[0011] The beneficial effects of the utility model are as follows: the integrated electro-hydraulic actuator of the utility model is adopted, and the electro-hydraulic actuator adopts an integrated design. There is no external oil pipe connection between the oil pump unit and the oil cylinder unit. The oil cylinder unit adopts an integrated cylinder body, which reduces external hydraulic connections and reduces the risk of oil leakage. There is no external cable connection between the motor and the electrical control box, which avoids damage to the cable due to external collision and improves the service life of the electro-hydraulic actuator. At the same time, a vertical valve position indicator is adopted and installed in the oil cylinder seat, which optimizes the overall layout and reduces the volume of the electro-hydraulic actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 for Figure 1 A cross-sectional view of

[0014] Figure 3 This is a schematic diagram of the structure of the oil pump unit of the utility model;

[0015] Figure 4 for Figure 3 A cross-sectional view of

[0016] Figure 5 This is a schematic diagram of the structure of the oil cylinder unit of the utility model;

[0017] Figure 6 for Figure 5 A cross-sectional view of

[0018] Figure 7 It is a first cross-sectional view of the oil cylinder unit and the electrical control box of the utility model;

[0019] Figure 8 It is a second cross-sectional view of the oil cylinder unit and the electrical control box of the utility model;

[0020] Fig. 9 It is a structural schematic diagram of the valve position indication of the utility model.

[0021] Explanation of the accompanying drawings: oil pump unit 1, oil pump seat 1a, oil pump oil circuit hole 1a-1, oil cylinder unit 2, oil cylinder seat 2a, oil cylinder oil circuit hole 2a-1, oil tank 3, oil pump 4, motor 5, oil cylinder 6, rack 6a, electrical control box 7, first oil circuit hole 8a, second oil circuit hole 8b, gear shaft 9a, driven gear 9a-1, first bevel gear 9a-2, valve position indicating rod 9b, second bevel gear 9b-1, valve position indicating block 9b-2, first threading hole 10a, second threading hole 10b, quick-change connector 11, electrical interface 12. Implementation

[0022] Further description is given below in conjunction with the accompanying drawings and specific implementation methods.

[0023] See also Figures 1 to 9 , an embodiment of an integrated electro-hydraulic actuator, comprising an oil pump unit 1 and an oil cylinder unit 2. The oil pump unit 1 comprises an oil pump seat 1a, an oil pump 4, and a motor 5. One side of the oil pump seat 1a is fixedly connected to the oil tank 3 by bolts, the oil pump 4 is located in the oil tank 3, and the other side of the oil pump seat 1a is fixedly connected to the motor 5 by bolts. The motor shaft of the motor 5 is connected to the oil pump shaft of the oil pump 4. An oil pump oil passage hole 1a-1 and a first threading hole 10a are provided in the oil pump seat 1a;

[0024] The cylinder unit 2 includes a cylinder seat 2a and a cylinder 6. The cylinder seat 2a and the cylinder 6 are an integrated structure. An electrical control box 7 is fixedly connected to one side of the cylinder seat 2a by bolts. A cylinder oil passage hole 2a-1 and a second threading hole 10b are provided in the cylinder seat 2a.

[0025] The oil pump seat 1a is fixedly connected with the oil cylinder seat 2a by bolts, so that the oil pump oil passage hole 1a-1 is connected with the oil cylinder oil passage hole 2a-1, and the first threading hole 10a is connected with the second threading hole 10b; the number of the oil pump oil passage hole 1a-1 and the oil cylinder oil passage hole 2a-1 are both two, one end of the oil pump oil passage hole 1a-1 is connected with the oil pump 4, and the oil cylinder oil passage hole 2a-1 includes a first oil passage hole 8a and a second oil passage hole 8b, and one end of the first oil passage hole 8a and the second oil passage hole 8b are respectively connected with the oil cylinder 6; the cable in the cavity of the electrical control box 7 enters the second threading hole 10b in the oil cylinder seat 2a, and then penetrates into the first threading hole 10a in the oil pump seat 1a to connect with the motor 5;

[0026] A rack 6a is arranged on the piston rod in the cavity of the oil cylinder 6, and a driven gear 9a-1 is arranged in the cavity of the oil cylinder seat 2a, the driven gear 9a-1 meshes with the rack 6a, the valve stem is connected to the lower end of the gear shaft 9a of the driven gear 9a-1, and a first bevel gear 9a-2 is arranged on the upper end, the first bevel gear 9a-2 meshes with the second bevel gear 9b-1 arranged on the valve position indicating rod 9b, the gear shaft 9a and the valve position indicating rod 9b are arranged vertically, the valve position indicating rod 9b is supported in the oil cylinder seat 2a through a bearing, and the other side extends into the electrical control box 7 to connect the valve position indicating block 9b-2;

[0027] Equivalent oil connection ports are provided on both sides of the oil cylinder 6, and quick-change connectors 11 are installed on the equivalent oil connection ports. In case of power failure or other emergency situations of the electro-hydraulic actuator, the ports can be used to connect to an external oil source to achieve emergency manual operation. An electrical interface 12 is provided on the side of the oil cylinder seat 6, and the electrical interface 12 is connected to the second threading hole 10b for connecting an external power supply and feedback signals.

[0028] The working principle of the utility model is as follows: when the electrical control box 7 receives an input signal, the control motor 5 drives the oil pump 4 to extract the oil in the oil tank 3, and the oil enters the oil pump oil path hole 1a-1 in the oil pump seat 1a, and flows into the oil cylinder oil path hole 2a-1 through the oil pump oil path hole 1a-1. The oil cylinder oil path hole 2a-1 includes a first oil path hole 8a and a second oil path hole 8b. The oil flows into one of the first oil path holes 8a and the second oil path hole 8b, and the oil is discharged back from the other oil path, respectively controlling the opening and closing of the valve. Closed, when oil flows into the first oil circuit hole 8a and enters the left end of the oil cylinder 6, the oil pushes the rack 6a to move rightward, and the oil at the right end of the oil cylinder 6 is discharged back through the second oil circuit hole 8b, and the rack 6a drives the driven gear 9a-1 to rotate, and the valve stem connected to the lower end of the gear shaft 9a of the driven gear 9a-1 rotates, and at the same time, the first bevel gear 9a-2 set at the upper end of the gear shaft 9a rotates, driving the valve position indicating rod 9b to rotate, and the valve position indicating block 9b-2 on the valve position indicating rod 9b displays the current valve rotation position.

[0029] There is no external oil pipe connection between the oil pump unit 1 and the oil cylinder unit 2 of the utility model. The oil cylinder unit 2 adopts an integrated cylinder body, which reduces the external hydraulic connection and reduces the risk of oil leakage. There is no external cable connection between the motor 5 and the electrical control box 7, which avoids damage to the cable due to external collision and improves the service life of the electro-hydraulic actuator. At the same time, a vertical valve position indicator is adopted and installed in the oil cylinder seat 2a, which optimizes the overall layout and reduces the volume of the electro-hydraulic actuator.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification made to the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. An integrated electro-hydraulic actuator, comprising an oil pump unit (1) and an oil cylinder unit (2), characterized in that: The oil pump unit (1) comprises an oil pump seat (1a), an oil pump (4), and a motor (5); one side of the oil pump seat (1a) is fixedly connected to an oil tank (3); the oil pump (4) is located in the oil tank (3); the other side of the oil pump seat (1a) is fixedly connected to the motor (5); the motor shaft of the motor (5) is connected to the oil pump shaft of the oil pump (4); an oil pump oil passage hole (1a-1) and a first threading hole (10a) are provided in the oil pump seat (1a); the oil cylinder unit (2) comprises an oil cylinder seat (2a) and an oil cylinder (6); the oil cylinder seat (2a) and the oil cylinder (6) are an integrated structure; one side of the oil cylinder seat (2a) is fixedly connected to an electrical control box (7); the oil cylinder seat (2a) is provided with an oil cylinder oil passage hole (2a-1) and a second threading hole (10b); the oil pump seat (1 a) is fixedly connected to the oil cylinder seat (2a) by bolts, so that the oil pump oil passage hole (1a-1) is connected to the oil cylinder oil passage hole (2a-1), and the first threading hole (10a) is connected to the second threading hole (10b); a rack (6a) is arranged on the piston rod in the oil cylinder (6) cavity, a driven gear (9a-1) is arranged in the cavity of the oil cylinder seat (2a), the driven gear (9a-1) is meshed with the rack (6a), the gear shaft (9a) of the driven gear (9a-1) is connected to the valve stem at the lower end, and a first bevel gear (9a-2) is arranged at the upper end, the first bevel gear (9a-2) is meshed with a second bevel gear (9b-1) arranged on the valve position indicating rod (9b), and the other side of the valve position indicating rod (9b) extends into the electrical control box (7) to connect to the valve position indicating block (9b-2).

2. The integrated electro-hydraulic actuator according to claim 1, characterized in that: The gear shaft (9a) and the valve position indicating rod (9b) are arranged perpendicularly.

3. An integrated electro-hydraulic actuator according to claim 1 or 2, characterized in that: The valve position indicating rod (9b) is supported in the oil cylinder seat (2a) via a bearing.

4. The integrated electro-hydraulic actuator according to claim 1, characterized in that: Equivalent oil connection ports are provided on both sides of the oil cylinder (6), and quick-change connectors (11) are installed on the equivalent oil connection ports for manual operation by connecting to an external oil source in an emergency.

5. The integrated electro-hydraulic actuator according to claim 1, characterized in that: An electrical interface (12) is provided on the side of the oil cylinder seat (2a), and the electrical interface (12) is in communication with the second threading hole (10b).

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