Compact electric actuator

Abstract

The utility model discloses a compact electric actuator, its characterized in that: a compact electric actuator, including upper casing, lower casing, fixed motor on the lower casing, install motor gear on the motor shaft, with the meshing intermediate gear of motor gear, fixed on the worm of intermediate gear center hole, with the meshing worm wheel of worm, install the output shaft on the worm wheel, install cam A and cam B on the output shaft, install the output shaft fixing plate on the lower casing, install micro -switch A and micro -switch B on the output shaft fixing plate.

Description

Technical fields:

[0001] This utility model belongs to the field of electric actuators, specifically to rotary electric actuators. Background technology:

[0002] Existing electric actuators have the following drawbacks: 1. Existing electric actuators have a large mechanical structure that occupies a lot of space, resulting in a large overall size that cannot be installed in small spaces and is also costly. 2. Existing electric actuators require opening the upper casing for wiring, which involves a large amount of work and is complex to operate. Utility model content:

[0003] The purpose of this invention is to provide a compact electric actuator that is simple in structure, low in cost, and easy to operate, overcoming the shortcomings and deficiencies of existing ordinary electric actuators.

[0004] To achieve the above objectives, the present invention provides a compact electric actuator, comprising an upper housing, a lower housing, a motor fixed to the lower housing, a motor gear mounted on the motor shaft, an intermediate gear meshing with the motor gear, a worm gear fixed to the intermediate gear, a worm wheel meshing with the worm gear, an output shaft mounted on the worm wheel, cams A and B mounted on the output shaft, an output shaft fixing plate mounted on the lower housing, and microswitches A and B mounted on the output shaft fixing plate. The lower housing has a recessed platform A and a recessed platform B. A bolt hole A penetrating the inner cavity of the lower housing is provided at the bottom of recessed platform A, and a bolt hole B penetrating the inner cavity of the lower housing is provided at the bottom of recessed platform B. An O-ring seal A is installed in recessed platform A, and an O-ring seal B is installed in recessed platform B. A positioning bolt A is installed in bolt hole A, and a positioning bolt B is installed in bolt hole B. The worm wheel has a fan-shaped structure. The lower housing includes a junction box.

[0005] The following effects can be achieved according to this utility model:

[0006] When the electric actuator is powered on, the motor drives the motor gear, intermediate gear, worm gear, worm wheel, output shaft, cam A, and cam B to rotate. During forward rotation, when the output shaft rotates beyond the set position, the worm wheel contacts the positioning bolt B, achieving a mechanical limit. During reverse rotation, when the output shaft rotates beyond the set position, the worm wheel contacts the positioning bolt A, achieving a mechanical limit. The lower housing has a junction box; wiring can be done directly through the junction box without opening the upper housing.

[0007] This invention saves installation space by using a fan-shaped structure for limiting the movement of the worm gear. The junction box in the lower housing improves ease of operation. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of the present utility model.

[0009] Figure 2 This is an exploded view of the structure of this utility model.

[0010] Figure 3 This is an external view of the worm gear in the structure of this utility model.

[0011] Figure 4 This is an external view of the lower shell in the structure of this utility model.

[0012] Figure 5 This is a structural appearance drawing of the present utility model.

[0013] exist Figure 1 In the diagram, 1 is the motor, 2 is the motor mounting plate, 3 is the intermediate gear, 4 is the motor gear, 5 is the bearing cover, 6 is the worm oil seal, 7 is the worm wheel, 8 is the output shaft, 9 is the lower housing, 10 is the output shaft mounting plate, 11 is cam A, 12 is cam B, 13 is micro switch A, 14 is micro switch B, and 15 is the worm.

[0014] exist Figure 2 In the diagram, 1 is the motor, 2 is the motor mounting plate, 3 is the intermediate gear, 4 is the motor gear, 5 is the bearing cover, 6 is the worm gear oil seal, 7 is the worm wheel, 8 is the output shaft, 9 is the lower housing, 10 is the output shaft mounting plate, 11 is cam A, 12 is cam B, 13 is micro switch A, 14 is micro switch B, 15 is the worm, 16 is the upper bearing of the output shaft, 17 is the front bearing of the worm, 18 is the O-ring seal A, 19 is the positioning bolt A, 20 is the O-ring seal B, 21 is the positioning bolt B, 22 is the output shaft oil seal, 23 is the lower bearing of the output shaft, 24 is the rear bearing of the worm, 25 is the worm mounting plate, and 26 is the upper housing.

[0015] Figure 3 This is a diagram of the worm gear.

[0016] exist Figure 4 In the diagram, 9-1 is recessed platform A, 9-2 is bolt hole A, 9-3 is recessed platform B, 9-4 is bolt hole B, and 9-5 is junction box.

[0017] Figure 5 This is an appearance drawing of the electric actuator of this utility model. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings:

[0019] This utility model discloses a compact electric actuator, including an upper housing 26, a lower housing 9, a motor 1 fixed on the lower housing, a motor gear 4 mounted on the motor shaft, an intermediate gear 3 meshing with the motor gear, a worm gear 15 fixed on the intermediate gear, a worm wheel 7 meshing with the worm gear, an output shaft 8 mounted on the worm wheel, cams A11 and B12 mounted on the output shaft, an output shaft fixing plate 10 mounted on the lower housing, and micro switches A13 and B14 mounted on the output shaft fixing plate. The lower housing has a recessed platform A9-1 and a recessed platform B9-3. A bolt hole A9-2 penetrating the inner cavity of the lower housing is provided at the bottom of recessed platform A, and a bolt hole B9-4 penetrating the inner cavity of the lower housing is provided at the bottom of recessed platform B. An O-ring A18 is installed in recessed platform A, and an O-ring B20 is installed in recessed platform B. A positioning bolt A19 is installed in bolt hole A, and a positioning bolt B21 is installed in bolt hole B. The worm wheel has a fan-shaped structure. The lower housing has a junction box 9-5.

[0020] When the motor (1) is rotating forward (clockwise), Figure 2 The middle arrow indicates the direction), driving the motor gear (4) to rotate clockwise. Figure 2 The middle arrow indicates the direction, and the middle gear (3) and worm (15) rotate counterclockwise. Figure 2 The middle arrow indicates the direction, and the worm gear (7), output shaft (8), and cam B (12) rotate clockwise. Figure 2 (The middle arrow indicates the direction). After running to the set position, cam B(12) triggers microswitch B(14) to cut off the power to motor (1) and stop running. When manually operated to rotate the output shaft (8) clockwise ( Figure 2 When the direction (indicated by the middle arrow) exceeds the set position, the worm gear (7) touches the positioning bolt B (21) to achieve mechanical limit.

[0021] When the motor (1) rotates in the reverse direction (counterclockwise), Figure 2 The middle arrow indicates the opposite direction, driving the motor gear (4) to rotate counterclockwise. Figure 2 The middle arrow indicates the opposite direction, and the middle gear (3) and worm (15) rotate clockwise. Figure 2 The middle arrow indicates the opposite direction, and the worm gear (7), output shaft (8), and cam A (11) rotate counterclockwise. Figure 2 (The middle arrow indicates the opposite direction). After running to the set position, cam A (11) triggers micro switch A (13) to cut off the power to motor (1) and stop running. When manually operated to rotate the output shaft (8) counterclockwise ( Figure 2 When the worm gear (7) exceeds the set position (the middle arrow indicates the opposite direction), it touches the positioning bolt A (19) to achieve mechanical limit.

[0022] The lower housing (9) is equipped with a junction box (9-5). When wiring, there is no need to open the upper housing (26). Wiring can be done directly in the junction box (9-5), which is convenient.

Claims

1. A compact electric actuator, characterized in that: Includes an upper housing (26), a lower housing (9), a motor (1) fixed on the lower housing, a motor gear (4) mounted on the motor shaft, an intermediate gear (3) meshing with the motor gear, a worm (15) fixed on the intermediate gear, a worm wheel (7) meshing with the worm, an output shaft (8) mounted on the worm wheel, cam A (11) and cam B (12) mounted on the output shaft, an output shaft fixing plate (10) mounted on the lower housing, and microswitches A (13) and B (14) mounted on the output shaft fixing plate.

2. The compact electric actuator according to claim 1, characterized in that: The worm gear (7) is designed as a fan-shaped structure.

3. The compact electric actuator according to claim 1, characterized in that: The lower housing (9) is provided with a recessed platform A (9-1) and a recessed platform B (9-3). A bolt hole A (9-2) penetrating the inner cavity of the lower housing (9) is provided at the bottom of the recessed platform A (9-1), and a bolt hole B (9-4) penetrating the inner cavity of the lower housing (9) is provided at the bottom of the recessed platform B (9-3).

4. The compact electric actuator according to claim 1, characterized in that: The lower housing (9) is equipped with a junction box (9-5).

5. The compact electric actuator according to claim 1, characterized in that: O-ring A (18) is installed in recessed platform A (9-1), O-ring B (20) is installed in recessed platform B (9-3), positioning bolt A (19) is installed in bolt hole A (9-2), and positioning bolt B (21) is installed in bolt hole B (9-4).

6. The compact electric actuator according to claim 1, characterized in that: When the motor (1) is running in the forward direction, when the output shaft (8) rotates beyond the set position, the worm gear (7) touches the positioning bolt B (21) to achieve mechanical limit.

7. The compact electric actuator according to claim 1, characterized in that: When the motor (1) is running in reverse, when the output shaft (8) rotates beyond the set position, the worm gear (7) touches the positioning bolt A (19) to achieve mechanical limit.

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