Electric actuator

Abstract

The utility model discloses an electric actuator which comprises a box body, a main shaft gear, a potentiometer circuit board and a gear box transmission assembly, the potentiometer circuit board is connected to the outer wall face of a box cover in a limiting mode, and when an actuating mechanism works, the main shaft gear rotates to drive a main shaft to move linearly and simultaneously drives an input gear meshed with the main shaft to rotate. Rotation of the input gear is sequentially transmitted to the output gear in a speed reduction mode through the gears and finally transmitted to the potentiometer hole of the circuit board through the output shaft of the output gear, so that linear movement displacement of the main shaft can be known, and accurate control is achieved. According to the utility model, the potentiometer circuit board is fixed on the outer wall surface of the box cover, so that the space of the box body can be fully utilized, and the electric actuator is compact in overall structure and small in occupied volume.

Description

Technical Field

[0001] The utility model relates to the technical field of stroke control, in particular to an actuator. Background Art

[0002] Electric actuator is a specific structure of actuator, which uses electricity as driving energy and works under the action of a certain driving energy and a certain control signal. Electric actuator contains various devices, such as position sensing device, torque sensing device, logic control device, PID control module, etc., all of which are installed in a compact box.

[0003] Therefore, the structural compactness of the electric actuator is a technical issue that the technicians in this field always pay attention to. Utility Model Content

[0004] The purpose of the utility model is to provide an electric actuator with a compact structure.

[0005] The utility model provides an electric actuator, comprising a box body, a main shaft gear, a potentiometer circuit board and a gear box transmission assembly, wherein the box body comprises a frame body with an opening and a box cover installed on the opening, the gear box transmission assembly and the main shaft gear are both arranged inside the main box body, the gear box transmission assembly comprises a gear box, the gear box has at least an input gear and an output gear inside, the input gear is meshed with the main shaft gear, the output shaft of the output gear comprises a connecting shaft section, the connecting shaft section passes through the gear box and the box cover and extends into the potentiometer hole of the potentiometer circuit board, and the potentiometer circuit board is limitedly connected to the outer wall surface of the box cover.

[0006] When the actuator is working, the main shaft gear rotates to drive the main shaft to move in a straight line, and at the same time drives the input gear meshing with it to rotate. The rotation of the input gear is successively decelerated and transmitted to the output gear through each gear, and finally transmitted to the potentiometer hole of the circuit board through the output shaft of the output gear, so that the linear movement displacement of the main shaft can be known, thereby achieving precise control. The utility model fixes the potentiometer circuit board to the outer wall surface of the box cover, which can make full use of the space of the box body, and realize the overall compact structure of the electric actuator and small occupied volume.

[0007] Optionally, the outer wall surface of the box cover is partially recessed to form a groove, the potentiometer circuit board is supported on the bottom wall of the groove, and a first through hole is provided on the bottom wall of the groove for the connecting shaft segment to pass through.

[0008] Optionally, the box cover and the potentiometer circuit board are connected and fixed via a snap-fit ​​structure.

[0009] Optionally, the bottom wall of the groove is provided with a first vertical plate and a second vertical plate opposite to each other, and the opposite surfaces of the first vertical plate and the second vertical plate are provided with raised buckles, and the potentiometer circuit board is confined between the buckles and the bottom wall of the groove.

[0010] Optionally, the box cover is limitedly connected to the potentiometer circuit board via a threaded component.

[0011] Optionally, one of the groove bottom wall and the potentiometer circuit board is provided with a limiting column, and the other is provided with a limiting hole cooperating with the limiting column. The number of the limiting columns is at least two, and the limiting column is installed in cooperation with the limiting hole to limit the circumferential rotation of the potentiometer circuit board.

[0012] Optionally, the output shaft of the output gear also includes a large diameter shaft section located outside the gear box, the connecting shaft section is connected to a side of the large diameter shaft section away from the gear box, and the large diameter shaft section is used for dynamic sealing with the inner wall of the box cover.

[0013] Optionally, the connecting shaft section is provided with an axial hole, and a side wall of the axial hole is provided with a longitudinally extending notch, and the axial hole is interference-fitted with a rotating shaft on the potentiometer circuit board.

[0014] Optionally, a second through hole is further provided on the box cover for allowing a rotating shaft connected to the main shaft gear to pass through.

[0015] Optionally, the box cover is fixedly connected to the frame by bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of an electric actuator in one embodiment of the utility model;

[0017] Figure 2 for Figure 1 Only the schematic diagram of the structure of the box cover, the gear box transmission assembly and the main shaft gear is shown;

[0018] Figure 3 for Figure 1 A partial enlarged schematic diagram of point B in the middle;

[0019] Figure 4 for Figure 1 A partial enlarged schematic diagram in the middle.

[0020] in Figures 1 to 4 middle:

[0021] 1 box body; 11 box cover; 111 second through hole; 112 mounting hole; 113 groove; 114 first vertical plate; 115 second vertical plate; 1141 buckle; 116 first through hole; 117 limiting column; 32 output shaft; 321 connecting shaft section; 12 frame body; 2 potentiometer circuit board; 2-1 notch; 2-2 limiting hole; 2-3 potentiometer hole; 3 gear box transmission assembly; 4 main shaft gear. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Please refer to Figures 1 to 4 , Figure 1 This is a structural schematic diagram of an electric actuator in one embodiment of the utility model; Figure 2 for Figure 1 Only the schematic diagram of the structure of the box cover, the gear box transmission assembly and the main shaft gear is shown; Figure 3 for Figure 1 A partial enlarged schematic diagram of point B in the middle; Figure 4 for Figure 1 A partial enlarged schematic diagram in the middle.

[0024] The utility model provides an electric actuator, which mainly comprises a box body 1, a main shaft gear 4, a potentiometer circuit board 2 and a gear box transmission component 3.

[0025] The housing 1 generally includes a frame 12 with an opening, the frame 12 encloses a cavity, and components such as the main shaft gear 4 and the gearbox transmission assembly 3 are installed inside the cavity, that is, the main shaft gear 4 and the gearbox transmission assembly 3 are installed inside the housing 1. The housing 1 also includes a cover 11, which is installed at the opening and is used to enclose a sealed cavity with the frame 12.

[0026] The gearbox transmission assembly 3 includes a gearbox and at least one transmission gear set, the transmission gear set includes an input gear and an output gear, and the transmission stages of the transmission gear set and the transmission ratio of each stage can be set according to the specific use environment. This article defines the first stage of the transmission gear assembly as the input gear and the last stage as the output gear.

[0027] Specifically, each gear can be installed inside the gearbox in the following manner, for example, the gearbox is fixed with a shaft, each gear is rotatably mounted on the corresponding mounting shaft, and the axial positioning of the gear can be limited by the inner walls on both sides of the gearbox. For example, the gearbox can include a first shell and a second shell, and the first shell and the second shell can be snap-fitted to facilitate disassembly and maintenance of the internal structure. The first shell and the second shell enclose a mounting space for the gear, wherein a mounting shaft is provided on the second shell, the input gear is rotatably mounted on the first mounting shaft, and the output gear is rotatably mounted on the second mounting shaft. The first shell, the second shell and the mounting shafts are not shown in the figure, but this does not hinder the understanding of the above technical solution of the present application by those skilled in the art.

[0028] In the present invention, the input gear meshes with the main shaft gear 4, and the output shaft of the output gear includes a connecting shaft section 321, which is located outside the gear box and passes through the box cover 11 to extend into the potentiometer hole 2-3 of the potentiometer circuit board 2. The potentiometer circuit board 2 of the present invention is limitedly connected to the outer wall surface of the box cover 11, and the potentiometer circuit board 2 is fixedly connected to the outer wall surface of the box cover 11 by means of clamping or bolts.

[0029] When the actuator is working, the main shaft gear 4 rotates to drive the main shaft to move in a straight line, and at the same time drives the input gear meshing with it to rotate. The rotation of the input gear is successively decelerated and transmitted to the output gear through each gear, and finally transmitted to the potentiometer hole of the circuit board through the output shaft 32 of the output gear, so that the linear movement displacement of the main shaft can be known, thereby achieving precise control. The utility model fixes the potentiometer circuit board 2 to the outer wall surface of the box cover 11, which can make full use of the space of the box body 1, and realize the overall structure of the electric actuator is compact and occupies less volume.

[0030] In a specific example, the connecting shaft section 321 is provided with an axial hole, and a peripheral wall of the axial hole is provided with a longitudinally extending notch, and the axial hole is interference-fitted with the rotating shaft on the potentiometer circuit board 2 .

[0031] The number of the notches may be one, two or more. The notches can improve the radial deformation capability of the axial hole, making it easier to assemble the axial hole with the rotating shaft.

[0032] In the present invention, the outer wall surface of the box cover 11 is partially recessed to form a groove 113, and the potentiometer circuit board 2 is supported on the bottom wall of the groove 113. The bottom wall of the groove is provided with a first through hole 116 for the connecting shaft section 321 to pass through. In this embodiment, the box cover 11 is provided with a groove 113, and the potentiometer circuit board 2 is arranged inside the groove 113, which can appropriately reduce the installation height of the potentiometer circuit board 2, and is conducive to improving the compactness of the overall structure while meeting the use strength.

[0033] In a specific embodiment, the box cover 11 and the potentiometer circuit board 2 are connected and fixed by a snap-fit ​​structure, and the bottom wall of the groove is provided with a first vertical plate 114 and a second vertical plate 115 opposite to each other. The opposite surfaces of the first vertical plate 114 and the second vertical plate 115 are provided with a raised snap-fit ​​1141, and the potentiometer circuit board 2 is confined between the snap-fit ​​1141 and the bottom wall of the groove.

[0034] Correspondingly, two sides of the potentiometer circuit board 2 have notches 2 - 1 , and the buckles are arranged at the positions of the notches 2 - 1 .

[0035] In a specific embodiment, one of the bottom wall of the groove and the potentiometer circuit board 2 is provided with a limiting post 117, and the other is provided with a limiting hole that cooperates with the limiting post 117. The number of the limiting posts 117 is at least two, and the limiting posts 117 are installed in cooperation with the limiting holes to limit the circumferential rotation of the potentiometer circuit board 2. Figure 3 It is shown that the box cover 11 is provided with two limit posts 117. Figure 4 Detailed implementation of setting the limiting hole 2 - 2 on the potentiometer circuit board 2 is shown in FIG. 1 . Of course, the limiting hole can also be set on the box cover 11 , and the limiting column 117 can be set on the potentiometer circuit board 2 .

[0036] In this embodiment, two limiting posts 117 are disposed at diagonal positions of the potentiometer circuit board 2 . The limiting posts 117 can limit the rotation of the potentiometer circuit board 2 in the circumferential direction, thereby improving the installation stability of the potentiometer circuit board 2 .

[0037] In a specific embodiment, the output shaft of the output gear also includes a large diameter shaft section located outside the gear box, and the connecting shaft section 321 is connected to the side of the large diameter shaft section away from the gear box, and the large diameter shaft section is used for dynamic sealing with the inner wall of the box cover 11.

[0038] In the above embodiments, the box cover 11 is further provided with a second through hole 111 for passing the rotating shaft connected to the main shaft gear 4. The box cover 11 may also be provided with a mounting hole 112 for mounting components such as bolts locked to the frame 12.

[0039] For other structures of electric actuators, please refer to other materials and will not be described in detail in this article.

[0040] The above is a detailed introduction to an electric actuator provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. An electric actuator, characterized in that: It includes a box body, a main shaft gear, a potentiometer circuit board and a gear box transmission assembly. The box body includes a frame body with an opening and a box cover installed on the opening. The gear box transmission assembly and the main shaft gear are both arranged inside the box body. The gear box transmission assembly includes a gear box. The gear box has at least an input gear and an output gear inside. The input gear is meshed with the main shaft gear. The output shaft of the output gear includes a connecting shaft section. The connecting shaft section passes through the gear box and the box cover and extends into the potentiometer hole of the potentiometer circuit board. The potentiometer circuit board is limitedly connected to the outer wall surface of the box cover.

2. The electric actuator according to claim 1, characterized in that: The outer wall surface of the box cover is partially recessed to form a groove, the potentiometer circuit board is supported on the bottom wall of the groove, and a first through hole is provided on the bottom wall of the groove for the connecting shaft section to pass through.

3. The electric actuator according to claim 2, characterized in that: The box cover and the potentiometer circuit board are connected and fixed via a snap-fit ​​structure.

4. The electric actuator according to claim 3, characterized in that: The bottom wall of the groove is provided with a first vertical plate and a second vertical plate opposite to each other, and the opposite surfaces of the first vertical plate and the second vertical plate are provided with protruding buckles, and the potentiometer circuit board is confined between the buckles and the bottom wall of the groove.

5. The electric actuator according to claim 2, characterized in that: The box cover is position-limitedly connected to the potentiometer circuit board via a threaded component.

6. The electric actuator according to any one of claims 2 to 5, characterized in that: One of the groove bottom wall and the potentiometer circuit board is provided with a limiting column, and the other is provided with a limiting hole matched with the limiting column. The number of the limiting columns is at least two, and the limiting columns are matched and installed in the limiting holes to limit the circumferential rotation of the potentiometer circuit board.

7. The electric actuator according to claim 1, characterized in that: The output shaft of the output gear also includes a large diameter shaft section located outside the gear box, the connecting shaft section is connected to the side of the large diameter shaft section away from the gear box, and the large diameter shaft section is used for dynamic sealing with the inner wall of the box cover.

8. The electric actuator according to any one of claims 1 to 5, characterized in that: The connecting shaft section is provided with an axial hole, and the side wall of the axial hole is provided with a longitudinally extending notch, and the axial hole is interference-fitted with the rotating shaft on the potentiometer circuit board.

9. The electric actuator according to any one of claims 1 to 5, characterized in that: The box cover is also provided with a second through hole for allowing the rotating shaft connected to the main shaft gear to pass through.

10. The electric actuator according to any one of claims 1 to 5, characterized in that: The box cover is fixedly connected to the frame body by bolts.

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