Linear travel switch type electric actuator

Abstract

The utility model relates to the technical field of actuators, in particular to a linear travel switch type electric actuator, which comprises a shell, a motor, a speed reducing structure and an actuating mechanism, the motor and the speed reducing structure are both assembled in the shell, one end of the actuating mechanism is assembled in the shell and is in transmission connection with the speed reducing structure, and the other end of the actuating mechanism penetrates out of the shell. The linear stroke actuator is used for controlling opening and closing of the valve; the executing mechanism comprises an executing part, a limiting assembly and an executing shaft, the executing part is assembled in the shell and is in transmission connection with the speed reducing structure, the executing shaft is assembled on the executing part, and the limiting assembly is assembled at the position of the executing part and is used for controlling the linear stroke of the executing shaft. The utility model aims to provide a linear stroke control valve which is simple in structure, high in control precision and convenient to maintain after long-term use when the linear stroke control valve is opened and closed.

Description

Technical Field

[0001] The utility model relates to the technical field of actuators, in particular to a linear travel switch type electric actuator. Background Art

[0002] The most common definition of an actuator is: a drive device that can provide linear or rotary motion, which uses some kind of drive energy and works under some kind of control signal. The actuator uses liquid, gas, electricity or other energy and converts it into a drive action through a motor, cylinder or other device. The basic actuator is used to drive the valve to a fully open or fully closed position. The actuator used for the control valve can accurately move the valve to any position.

[0003] Existing electric actuators generally use reed positioning and double micro switches for positioning. Some electric actuators also use torque structures for position limiting. However, when using reed positioning, there is a problem of poor control accuracy; when using double micro switches for positioning, there are generally problems of high space layout requirements and high failure rate; when using torque structures for position limiting, there are generally more complex structures, more troublesome during assembly, and difficult to maintain after problems occur. Therefore, it is necessary to develop an electric actuator with high control accuracy and simple structure. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a linear stroke switch type electric actuator, which not only has a simple structure but also has high control accuracy when the linear stroke controls the opening and closing of the valve, and is easy to maintain after long-term use.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] The linear stroke switch type electric actuator comprises a housing, a motor, a reduction structure and an actuator, wherein the motor and the reduction structure are both assembled in the housing, one end of the actuator is assembled in the housing and is transmission-connected with the reduction structure, and the other end passes through the housing, and is used for the linear stroke actuator to control the opening and closing of the valve;

[0007] The actuator includes an actuator, a limit assembly and an actuator shaft. The actuator is assembled in a housing and is transmission-connected to a reduction structure. The actuator shaft is assembled on the actuator. The limit assembly is assembled at the actuator to control the linear travel of the actuator shaft.

[0008] Furthermore, the actuator includes a driving gear and a transmission shaft. The driving gear is rotatably assembled in the shell and is transmission-connected to the reduction structure. The transmission shaft is fixedly assembled in the middle of the driving gear. The limit assembly is assembled on the transmission shaft and is used to control the linear stroke of the actuator shaft. One end of the actuator shaft is screwed on the transmission shaft, and the other end passes through the shell.

[0009] According to the above technical means, the operation of the limit assembly can be controlled through the cooperation between the driving gear and the transmission shaft, thereby controlling the linear travel of the actuator shaft.

[0010] Furthermore, the execution shaft comprises a transmission plate and an execution part, the transmission plate is screwed on the transmission shaft, and the execution part is sleeved on the transmission shaft and fixedly connected to the transmission plate.

[0011] According to the above technical means, it is convenient to assemble the shaft and the practicability is strong.

[0012] Furthermore, the limiting assembly includes a first mounting seat, a second mounting seat and a limiting structure, the first mounting seat is fixedly assembled in the shell, the limiting structure is assembled on the actuator, and the second mounting seat is assembled on the first mounting seat.

[0013] According to the above technical means, through the mutual cooperation of the first mounting seat, the second mounting seat and the limiting structure, on the one hand, it is convenient to install the limiting structure; on the other hand, it is beneficial to seal the actuator shaft.

[0014] Furthermore, the limiting structure includes a rotating plate, a first touch portion and a second touch portion, the rotating plate is fixedly mounted on the actuator, and the first touch portion and the second touch portion are respectively fixedly mounted on both sides of the rotating plate to control the moving distance of the actuator shaft.

[0015] According to the above technical means, by rotating the rotating plate, when the first touch part is working, it can control the linear movement of the actuator shaft to close the valve; when the second touch part is working, it can control the linear movement of the actuator shaft to open the valve. The entire stroke distance is larger, which is conducive to opening and closing valves of different specifications.

[0016] Furthermore, the first touch part includes a first touch block, a sliding seat, a limit rod and a first touch switch, the first touch block is fixedly assembled on the upper part of the rotating plate, the sliding seat is fixedly assembled on the inner wall of the first mounting seat, the first touch switch is assembled on the sliding seat and corresponds to the first touch block, the limit rod is assembled on the sliding seat and is slidably connected with the actuator shaft.

[0017] According to the above technical means, on the one hand, the valve can be closed; on the other hand, the actuator shaft can be moved linearly.

[0018] Furthermore, the second touch part includes a second touch block, a second touch switch and a stopper, the stopper is fixedly assembled in the first mounting seat, the second touch block is fixedly assembled at the lower part of the rotating plate, and the second touch switch is assembled on the stopper and corresponds to the second touch block.

[0019] According to the above technical means, the actuator shaft can be lowered to open the valve.

[0020] Furthermore, the deceleration structure includes a first mounting plate, a second mounting plate, a third mounting plate and a gear set. The first mounting plate is assembled in the shell and fixedly connected to the motor. The gear set and the actuator are assembled between the second mounting plate and the third mounting plate. The gear set and the actuator are transmission connected.

[0021] According to the above technical means, the installation of the deceleration structure and the actuator is facilitated, and it is beneficial to improve the movement accuracy of the motor output shaft.

[0022] Furthermore, the gear set includes a main gear, a sub-gear and a ring gear, the main gear is fixedly mounted on the output shaft of the motor, the ring gear is rotatably mounted between the second mounting plate and the third mounting plate, the sub-gear is meshed between the main gear and the ring gear, and the outer side of the ring gear is transmission-connected to the actuator.

[0023] According to the above technical means, the transmission of the motor is made more precise through the mutual cooperation of the main gear, the secondary gear and the ring gear.

[0024] Furthermore, a controller is fixedly mounted on the first mounting plate, an indicator light is mounted on the housing, and the controller is electrically connected to the motor, the indicator light and the actuator.

[0025] According to the above technical means, on the one hand, accurate control of the motor can be achieved, and on the other hand, it is helpful to observe the working status of the actuator axis and facilitate subsequent maintenance.

[0026] The present application adopting the above scheme has the following beneficial effects:

[0027] 1. By adopting the actuator, limit assembly and actuator shaft to form the actuator mechanism, on the one hand, it can control the opening and closing of the valve by the linear stroke electric actuator with high precision; on the other hand, it has a simple structure, is easy to maintain in the later stage, and has strong practicality.

[0028] 2. By setting the limiting structure as a rotating plate, a first touch part and a second touch part, on the one hand, the movement of the actuator shaft can be controlled, thereby controlling the opening and closing of the valve; on the other hand, the linear motion of the actuator shaft can be achieved, and the structure is simple.

[0029] 3. The indicator light cooperates with the actuator shaft to indicate the opening and closing of the valve, so that the working status of the electric actuator can be intuitively understood, which is beneficial to subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0031] Figure 1It is a structural schematic diagram of a linear travel switch type electric actuator in an embodiment of the present application;

[0032] Figure 2 It is a schematic cross-sectional view of the linear travel switch type electric actuator in the embodiment of the present application;

[0033] Figure 3 This is a schematic diagram of the internal structure of the embodiment of the present application without the housing;

[0034] Figure 4 is a schematic diagram of the structure in which the gear set and the driving gear are meshed in an embodiment of the present application;

[0035] Figure 5 It is a schematic diagram of the split structure of the actuator in the embodiment of the present application;

[0036] Figure 6 It is a schematic diagram of a partial assembly structure of a rotating plate in an embodiment of the present application;

[0037] Figure 7 It is a schematic diagram of a partial assembly structure at the second mounting seat in an embodiment of the present application;

[0038] Description of main symbols and components:

[0039] 1. Shell; 11. Upper shell; 12. Lower shell; 13. Indicator light; 2. Motor; 3. Speed ​​reduction structure; 31. First mounting plate; 311. Controller; 32. Second mounting plate; 321. Positioning column; 33. Third mounting plate; 34. Gear set; 341. Main gear; 342. Sub gear; 343. Ring gear; 4. Actuator; 41. Driving gear; 42. Transmission shaft; 43. Actuator shaft; 431. Transmission plate; 432. Actuator; 433. Groove; 44. First mounting seat; 45. Second mounting seat; 451. Sliding seat; 452. Limit rod; 453. First touch switch; 46. Rotating plate; 47. First touch block; 48. Second touch block; 481. Stop block; 482. Second touch switch. DETAILED DESCRIPTION

[0040] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are only for exemplary descriptions, and they are only schematic diagrams, not physical diagrams, and cannot be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures in the figures and their descriptions may be omitted.

[0041] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the figure. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. In the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0042] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0043] like Figure 1-7 As shown, the embodiment of the present application discloses a linear travel switch type electric actuator, including a housing 1, a motor 2, a reduction structure 3 and an actuator 4. The motor 2 and the reduction structure 3 are both assembled in the housing 1 to provide power and transmission. One end of the actuator 4 is assembled in the housing 1 and is transmission-connected to the reduction structure 3, and the other end passes through the housing 1 to realize the opening and closing of the valve by the linear travel actuator.

[0044] Through the cooperation of the motor 2, the reduction structure 3 and the actuator 4, on the one hand, the opening and closing of the valve can be controlled by linear stroke; on the other hand, the control accuracy is high, and the structure is simple, which is convenient for maintenance after long-term use and has strong practicality.

[0045] In some embodiments, Figure 1-2 As shown, the housing 1 includes an upper housing 11 and a lower housing 12. The upper housing 11 and the lower housing 12 are detachably fixedly connected by bolts. In order to enhance the sealing between the upper housing 11 and the lower housing 12, a sealing strip can be provided at the lower housing 12. The end of the actuator 4 passes through the upper housing 11 to realize the opening and closing control of the valve.

[0046] In this embodiment, the upper shell 11 and the lower shell 12 can be formed by plastic injection molding, or by integral die casting using alloy materials, such as aluminum alloy materials, magnesium aluminum alloys, and the like.

[0047] In some embodiments, Figure 2-4As shown, the speed reduction structure 3 includes a first mounting plate 31, a second mounting plate 32, a third mounting plate 33 and a gear set 34. The first mounting plate 31 is assembled in the housing 1 and fixedly connected to the motor 2, and is used to provide a mounting base for the motor 2. The gear set 34 and the actuator 4 are both assembled between the second mounting plate 32 and the third mounting plate 33. The gear set 34 and the actuator are connected in a transmission manner, so that when the motor 2 is working, the actuator 4 can be driven to work through the gear set 34, thereby realizing the opening and closing of the valve.

[0048] In this embodiment, a controller 311 is fixedly mounted on the first mounting plate 31, and the controller 311 is electrically connected to the motor 2 and the actuator 4 to control the working state of the motor 2. In actual use, the controller 311 can also be connected to the motor 2 via a data line. The controller 311 can be a PLC controller, or a microcomputer controller, and can also be selected according to actual conditions.

[0049] In this embodiment, if Figure 4 As shown, the gear set 34 includes a main gear 341, a sub gear 342 and a ring gear 343. The main gear 341 is fixedly assembled on the output shaft of the motor 2 through a spline. The ring gear 343 is rotatably assembled between the second mounting plate 32 and the third mounting plate 33, and the sub gear 342 is meshed between the main gear 341 and the ring gear 343. The sub gear 342 is provided in three numbers, and the three sub gears 342 are arranged at equal angles between the main gear 341 and the inner side of the ring gear 343 to form a planetary gear, so that when the main gear 341 rotates, it can drive the ring gear 343 to rotate through the sub gear 342. The outer side of the ring gear 343 is provided with teeth, and the number of teeth on the inner side of the ring gear 343 is the same as that on the outer side, so that when the ring gear 343 rotates, it can keep synchronously driving the actuator 4 to move.

[0050] In this embodiment, the second mounting plate 32 and the third mounting plate 33 are fixed by bolts during assembly, so that the gear ring 343 is stably installed. The first mounting plate 31 and the second mounting plate 32 are then fixed by bolts to install the reduction mechanism 3, the actuator 4 and the motor 2 stably, making assembly more convenient.

[0051] In some embodiments, Figure 2-3 and Figure 5-7 As shown, the actuator 4 includes an actuator, a limit assembly and an actuator shaft 43. The actuator is assembled between the second mounting plate 32 and the third mounting plate 33, and partially passes through the third mounting plate 33, and is also connected to the reduction structure 3 in transmission, so that when the motor 2 is working, it can drive the actuator to work through the gear set 34. The actuator shaft 43 is assembled on the actuator, so that when the actuator is working, it can drive the actuator shaft 43 to move. The limit assembly is assembled at the actuator to control the linear travel of the actuator shaft 43.

[0052] In this embodiment, if Figure 3 As shown, the actuator includes a driving gear 41 and a transmission shaft 42. The driving gear 41 is rotatably mounted between the second mounting plate 32 and the third mounting plate 33, and meshes with the teeth on the outer side of the gear ring 343. One end of the transmission shaft 42 is fixedly mounted in the middle of the driving gear 41, so that when the driving gear 41 rotates, it can drive the transmission shaft 42 to rotate. The limit assembly is assembled at the transmission shaft 42 to control the linear stroke of the actuator shaft 43. One end of the actuator shaft 43 is screwed to the transmission shaft 42, and the other end passes through the upper housing 11, thereby realizing the opening and closing of the valve.

[0053] In this embodiment, the second mounting plate 32 is provided with a positioning column 321 in the middle of the driving gear 41, and the lower end of the positioning column 321 is recessed in the middle of the upper end of the driving gear 41, which is conducive to the positioning and installation of the driving gear 41. A bearing is installed at the assembly point of the third mounting plate 33 and the transmission shaft 42, so that the driving gear 41 and the transmission shaft 42 can rotate more smoothly.

[0054] In this embodiment, if Figure 5 As shown, the middle part of the transmission shaft 42 has an external thread, the side of the transmission shaft 42 close to the bearing is a polished rod, and the free end of the transmission shaft 42 is also a polished rod, which is convenient for the assembly of the execution shaft 43 and also limits the maximum moving distance of the execution shaft 43. The execution shaft 43 includes a transmission plate 431 and an execution part 432. The transmission plate 431 is screwed on the transmission shaft 42, and the execution part 432 is sleeved on the transmission shaft 42 and fixedly connected with the transmission plate 431 by bolts, which is convenient for the assembly of the execution shaft 43 and has strong practicality.

[0055] In some embodiments, Figure 5 As shown, the limiting assembly includes a first mounting seat 44, a second mounting seat 45 and a limiting structure. The first mounting seat 44 is fixedly assembled on the third mounting plate 33 by bolts, the limiting structure is assembled on the transmission shaft 42, the second mounting seat 45 is assembled on the first mounting seat 44 by bolts, and the lower end of the execution shaft 43 is located in the second mounting seat 45, which is convenient for the installation of the limiting structure on the one hand, and is conducive to the sealing of the execution shaft 43 on the other hand.

[0056] In this embodiment, the limiting structure includes a rotating plate 46, a first actuating portion, and a second actuating portion. The rotating plate 46 is fixedly assembled on the polished rod of the transmission shaft 42 close to the bearing side through a spline, so that when the transmission shaft 42 rotates, the rotating plate 46 can be synchronously driven to rotate. The first actuating portion and the second actuating portion are respectively fixedly assembled on the upper and lower sides of the rotating plate 46, and are used to control the moving distance of the actuator shaft 43, thereby controlling the opening and closing range of the valve.

[0057] When the rotating plate 46 rotates and the first touch part works, the linear movement of the actuator shaft 43 can be controlled to close the valve; when the second touch part works, the linear movement of the actuator shaft 43 can be controlled to open the valve. The entire stroke distance is larger, which is conducive to opening and closing valves of different specifications.

[0058] In this embodiment, if Figure 5-7 As shown, the first touch part includes a first touch block 47, a sliding seat 451, a limit rod 452 and a first touch switch 453. The first touch block 47 is fixedly mounted on the upper part of the rotating plate 46, the sliding seat 451 is fixedly mounted on the inner wall of the first mounting seat 44 by bolts, the first touch switch 453 is mounted on the sliding seat 451 and corresponds to the first touch block 47. When the rotating plate 46 rotates, the first touch block 47 is driven to rotate and contact the first touch switch 453. The first touch switch 453 is electrically connected to the controller 311. When the first touch switch 453 is connected to the first touch block 47, the first touch switch 453 sends a signal to the controller 311, and the controller 311 controls the output shaft of the motor 2 to stop rotating, thereby closing the valve. The limit rod 452 is mounted on the sliding seat 451 and is slidably connected to the execution shaft 43, so as to enable the execution shaft 43 to move linearly along the transmission shaft 42.

[0059] In this embodiment, the end face of the first touch block 47 is arc-shaped with a height difference, the limit rod 452 slides out of the sliding seat 451, one end of the limit rod 452 is located at the bottom of the end face of the first touch block 47, and the other end is located in the groove 433 of the actuator 432, so that when the first touch block 47 rotates, on the one hand, it can realize the control of the stroke of the actuator 432; on the other hand, it can make the limit rod 452 move with the movement of the actuator 432, keep the limit of the actuator 432, and ensure the linear movement of the actuator 432. And the first touch switch 453 is assembled on the sliding seat 451, which saves installation space and is also easy to install.

[0060] In some other embodiments, the first touch switch 453 can also be set as a photoelectric detection switch. When the first touch block 47 moves to the position of the photoelectric detection switch, the photoelectric detection switch detects the first touch block 47 and sends a signal to the controller 311, so that the controller 311 controls the operation of the motor 2. Of course, multiple photoelectric detection switches can be set to detect different positions of the first touch block 47, so as to control the closing amplitude of the valve by the actuator 432 to adapt to different application scenarios.

[0061] In this embodiment, if Figure 5-6As shown, the second touch part includes a second touch block 48, a second touch switch 482 and a stopper 481. The stopper 481 is fixedly mounted in the first mounting seat 44, the second touch block 48 is fixedly mounted at the lower part of the rotating plate 46, and the second touch switch 482 is mounted on the stopper 481 and corresponds to the second touch block 48. When the rotating plate 46 rotates in the reverse direction, the second touch block 48 can be driven to contact the second touch switch 482, and the second touch switch 482 is electrically connected to the control line, so that the controller 311 controls the output shaft of the motor 2 to stop rotating, thereby realizing the opening of the valve.

[0062] In this embodiment, the end surface of the second touch block 48 is arc-shaped with a height difference, and the stopper 481 has a receiving space, so that the second touch block 48 can enter the receiving space when rotating. In actual situations, the second touch block 48 can also be a vertical long block that can contact the second touch switch 482.

[0063] In this embodiment, the arc directions of the first actuating block 47 and the second actuating block 48 are opposite, so that when the actuator 432 controls the opening and closing of the valve, they will not affect each other.

[0064] In some other embodiments, the second touch switch 482 can also be set as a photoelectric detection switch, and the control method is the same as the control method of the first touch switch 453. Of course, multiple photoelectric detection switches can be set here to detect different positions of the second touch block 48, so as to control the opening range of the valve by the actuator 432 to adapt to different application scenarios.

[0065] In this embodiment, if Figure 1 As shown, an indicator light 13 is installed on the upper shell 11. The indicator light 13 is set to two, one to indicate the opening of the valve and the other to indicate the closing of the valve. The two indicator lights 13 are electrically connected to the controller 311, which is conducive to observing the working status of the actuator shaft 43 and facilitating later maintenance.

[0066] The above is a detailed introduction to the linear travel switch type electric actuator provided by the present application. The description of the specific embodiment is only used to help understand the method and its core idea of ​​the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present utility model.

[0067] It should be noted that the phrases "one embodiment", "embodiment", "some optional embodiments", "exemplary embodiments", "some embodiments", etc. mentioned in the specification indicate that the described embodiment may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0068] The above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model. The technology, shape, and structure that are not described in detail in the utility model are all well-known technologies.

Claims

1. Linear travel switch type electric actuator, characterized in that: The invention comprises a housing (1), a motor (2), a reduction structure (3) and an actuator (4), wherein the motor (2) and the reduction structure (3) are both assembled in the housing (1); one end of the actuator (4) is assembled in the housing (1) and is transmission-connected to the reduction structure (3); the other end of the actuator (4) passes through the housing (1) and is used for a linear actuator to control the opening and closing of a valve; The actuator (4) comprises an actuator, a limit assembly and an actuator shaft (43); the actuator is assembled in a housing (1) and is transmission-connected to a reduction structure (3); the actuator shaft (43) is assembled on the actuator; the limit assembly is assembled at the actuator and is used to control the linear travel of the actuator shaft (43).

2. The linear travel switch type electric actuator according to claim 1, characterized in that: The actuator comprises a driving gear (41) and a transmission shaft (42); the driving gear (41) is rotatably mounted in the housing (1) and is transmission-connected to the reduction structure (3); the transmission shaft (42) is fixedly mounted in the middle of the driving gear (41); the limit assembly is mounted on the transmission shaft (42) and is used to control the linear travel of the actuator shaft (43); one end of the actuator shaft (43) is screwed onto the transmission shaft (42), and the other end passes through the housing (1).

3. The linear travel switch type electric actuator according to claim 2, characterized in that: The execution shaft (43) comprises a transmission plate (431) and an execution part (432); the transmission plate (431) is screwed onto the transmission shaft (42); the execution part (432) is sleeved onto the transmission shaft (42) and fixedly connected to the transmission plate (431).

4. The linear travel switch type electric actuator according to claim 1, characterized in that: The limiting assembly comprises a first mounting seat (44), a second mounting seat (45) and a limiting structure, wherein the first mounting seat (44) is fixedly mounted in the housing (1), the limiting structure is mounted on the actuator, and the second mounting seat (45) is mounted on the first mounting seat (44).

5. The linear travel switch type electric actuator according to claim 4 is characterized in that: The limiting structure comprises a rotating plate (46), a first touch portion and a second touch portion, wherein the rotating plate (46) is fixedly mounted on the actuator, and the first touch portion and the second touch portion are respectively fixedly mounted on both sides of the rotating plate (46) for controlling the moving distance of the actuator shaft (43).

6. The linear travel switch type electric actuator according to claim 5, characterized in that: The first touch part comprises a first touch block (47), a sliding seat (451), a limit rod (452) and a first touch switch (453); the first touch block (47) is fixedly mounted on the upper part of the rotating plate (46); the sliding seat (451) is fixedly mounted on the inner wall of the first mounting seat (44); the first touch switch (453) is mounted on the sliding seat (451) and corresponds to the first touch block (47); the limit rod (452) is mounted on the sliding seat (451) and is slidably connected to the execution shaft (43).

7. The linear travel switch type electric actuator according to claim 5, characterized in that: The second touch part comprises a second touch block (48), a second touch switch (482) and a stop block (481); the stop block (481) is fixedly mounted in the first mounting seat (44); the second touch block (48) is fixedly mounted on the lower part of the rotating plate (46); the second touch switch (482) is mounted on the stop block (481) and corresponds to the second touch block (48).

8. The linear travel switch type electric actuator according to claim 1, characterized in that: The deceleration structure (3) comprises a first mounting plate (31), a second mounting plate (32), a third mounting plate (33) and a gear set (34); the first mounting plate (31) is mounted in the housing (1) and fixedly connected to the motor (2); the gear set (34) and the actuator are both mounted between the second mounting plate (32) and the third mounting plate (33); and the gear set (34) and the actuator are transmission-connected.

9. The linear travel switch type electric actuator according to claim 8, characterized in that: The gear set (34) comprises a main gear (341), a sub-gear (342) and a ring gear (343); the main gear (341) is fixedly mounted on the output shaft of the motor (2); the ring gear (343) is rotatably mounted between the second mounting plate (32) and the third mounting plate (33); the sub-gear (342) is meshed between the main gear (341) and the ring gear (343); and the outer side of the ring gear (343) is transmission-connected to the actuator.

10. The linear travel switch type electric actuator according to claim 8, characterized in that: A controller (311) is fixedly mounted on the first mounting plate (31), an indicator light (13) is mounted on the housing (1), and the controller (311) is electrically connected to the motor (2), the indicator light (13) and the actuator (4).

Images