Multi-rotation valve electric actuator locking device

Abstract

The invention discloses a multi-turn valve electric actuator locking device which comprises a multi-turn valve electric actuator, an output shaft is rotationally connected to the top face of the multi-turn valve electric actuator, and a hand wheel and a locking unit are fixedly installed at the end, away from the multi-turn valve electric actuator, of the output shaft. The locking unit is arranged above the multi-rotation valve electric actuator and comprises a clamping ring and a clamping block, the clamping block used for moving oppositely can be connected with the outer wall of the clamping ring in a clamping mode so as to lock an output shaft fixedly installed in the clamping ring, and the auxiliary unit is arranged on the inner side of the locking unit and used for locking the output shaft fixedly installed in the clamping ring. The auxiliary unit comprises a first anti-slip ring and a second anti-slip ring and is used for preventing the output shaft from rotating and assisting in locking the output shaft under the limitation of the first anti-slip ring and the second anti-slip ring which are mutually staggered and extruded, the anti-loosening unit is arranged on the outer side of the locking unit, and the anti-loosening unit comprises a pressing block, a spring and a pressing plate.

Description

Technical Field

[0001] The present invention relates to the technical field of locking of multi-rotary valve electric actuators, and in particular to a locking device for a multi-rotary valve electric actuator. Background Art

[0002] A multi-turn valve electric actuator is a mechatronic drive device that uses electricity as its power source and drives the valve core to complete multiple rotations through internal motors, reduction mechanisms and other transmission components, thereby realizing the valve opening, closing or adjustment functions. The multi-turn valve electric actuator locking device is a mechanical or mechatronic component installed on the multi-turn valve electric actuator to lock the position of its output shaft or transmission components when the actuator is shut down or under specific working conditions, preventing the valve from rotating unexpectedly due to external forces, thereby ensuring the stability of the valve opening and closing state and the safe operation of the system.

[0003] When using existing multi-turn valve electric actuators, it is inconvenient to lock the output shaft, causing the valve to rotate due to external force, which in turn causes the valve opening to shift, fluid control to be inaccurate, and even causes industrial production safety hazards.

[0004] Therefore, a multi-rotation valve electric actuator locking device is needed to solve the above problems. Summary of the Invention

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0006] In view of the above-mentioned problems of the locking device of the electric actuator of a multi-rotation valve, the present invention is proposed.

[0007] Therefore, the purpose of the present invention is to provide a multi-turn valve electric actuator locking device, which is used to solve the problem that "the existing multi-turn valve electric actuator is inconvenient to lock the output shaft when in use, causing the valve to rotate due to external force, and then causing the valve opening to shift, fluid control to be inaccurate, and even causing industrial production safety hazards."

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a locking device for a multi-rotation valve electric actuator, comprising: A multi-turn valve electric actuator, wherein the top surface of the multi-turn valve electric actuator is rotatably connected to an output shaft, and a handwheel is fixedly mounted on one end of the output shaft away from the multi-turn valve electric actuator; Locking unit, locking unit is placed on the multi-rotation valve electric actuator, the locking unit includes a collar and a block, the block can be connected to the outer wall of the collar for the opposite movement, so as to lock the output shaft fixedly installed in the collar; Auxiliary unit, the auxiliary unit is placed in the locking unit, the auxiliary unit includes a first anti-skid ring and a second anti-skid ring, which can avoid the rotation of the output shaft under the limitation of the first anti-skid ring and the second anti-skid ring, and can assist the locking of the output shaft; Anti-loose unit, the anti-loose unit is placed outside the locking unit, the anti-loose unit includes a pressing block, a spring and a pressing plate, which can be pressed by the pressing plate under the elastic action of the spring, and the pressing block can exert downward pressure on the slip ring to avoid the rotation of the screw caused by vibration, thereby making it difficult to lock the output shaft. Under the limitation of the locking unit and the auxiliary unit, the output shaft can be locked, and under the limitation of the anti-loose unit, the screw in the locking unit can be prevented from being misaligned due to vibration, so as to assist the limitation of the locking unit.

[0009] As a preferred scheme of the locking device of the multi-rotation valve electric actuator, the locking unit includes a collar fixedly installed on the outer wall of the output shaft, a fixed block is fixedly installed on the top surface of the multi-rotation valve electric actuator, and a first sliding rod is slidably arranged in the fixed block.

[0010] As a preferred scheme of the locking device of the multi-rotation valve electric actuator, the locking unit includes a collar fixedly installed on the outer wall of the output shaft, a fixed block is fixedly installed on the top surface of the multi-rotation valve electric actuator, and a first sliding rod is slidably arranged in the fixed block.

[0011] As a preferred scheme of the locking device of the multi-rotation valve electric actuator, the locking unit includes a collar fixedly installed on the outer wall of the output shaft, a fixed block is fixedly installed on the top surface of the multi-rotation valve electric actuator, and a first sliding rod is slidably arranged in the fixed block.

[0012] As a preferred scheme of the locking device of the multi-rotation valve electric actuator, the locking unit includes a collar fixedly installed on the outer wall of the output shaft, a fixed block is fixedly installed on the top surface of the multi-rotation valve electric actuator, and a first sliding rod is slidably arranged in the fixed block.

[0013] As a preferred solution of the locking device of a multi-rotation valve electric actuator described in the present invention, the auxiliary unit includes a first rubber ring fixedly installed on the bottom of the slip ring, a first anti-slip ring is fixedly installed on the bottom of the first rubber ring, a fixing ring is fixedly installed on the outer wall of the output shaft, a second rubber ring is fixedly installed on the top surface of the fixing ring, and a second anti-slip ring is fixedly installed on the top surface of the second rubber ring.

[0014] As a preferred solution of the locking device of a multi-rotation valve electric actuator described in the present invention, wherein: the interior of the first rubber ring is slidingly arranged with the outer wall of the output shaft, and the first anti-slip ring and the second anti-slip ring are provided with anti-slip strips on the side away from the first rubber ring and the second rubber ring. Under the restriction of the anti-slip strips, the first rubber ring drives the first anti-slip ring to contact and squeeze with the second rubber ring and the second anti-slip ring, thereby assisting in locking the output shaft.

[0015] As a preferred solution of the locking device of a multi-rotation valve electric actuator described in the present invention, the anti-loosening unit includes a pressure block fixedly installed on the outer wall of the slip ring, a limit frame is slidingly provided on the outer wall of the pressure block, a second slide rod is slidingly provided inside the limit frame, a spring is sleeved on the outer wall of the second slide rod, and a pressure plate is fixedly installed on the end of the second slide rod.

[0016] As a preferred solution of the locking device of a multi-rotation valve electric actuator described in the present invention, wherein: one end of the second slide rod is fixedly installed on the top surface of the pressure plate, and the second slide rod is fixedly installed on the inner side of the limit frame at one end away from the pressure plate. Under the elastic action of the second slide rod, the pressure plate can be pushed, and the pressure plate applies a downward thrust to the pressure block and the slip ring to prevent vibration from driving the screw to rotate and causing the slip ring to move upward.

[0017] As a preferred solution of the multi-rotation valve electric actuator locking device described in the present invention, the outer wall of the pressure plate is slidingly arranged with the inner side of the limit frame, and the pressure plate is arranged parallel to the pressure block. Under the restriction of the pressure plate, the screw can be prevented from rotating.

[0018] The beneficial effects of the present invention are as follows: after the output shaft has completed its rotation, the screw is rotated. Since the bottom end of the screw is rotationally connected to the top surface of the actuator and the slip ring is slidingly matched with the outer wall of the output shaft, the screw will drive the sleeve block and the slip ring to move downward. Under the constraint of the connecting plate, the downward-moving slip ring pushes the clamping block through the connecting bar and the connecting plate, so that the first slide bar on the clamping block slides in the fixed block. Finally, the two clamping blocks move toward each other and engage with the clamping ring of the output shaft, thereby locking the output shaft. When the slip ring moves downward, it drives the first rubber ring to move downward synchronously, so that the first anti-slip ring contacts and squeezes the second anti-slip ring. Under the constraints of the two rubber rings and the staggered design of the two anti-slip rings, the output shaft can be locked and prevented from rotating. After the clamping block is engaged with the clamping ring, in order to prevent the screw from rotating incorrectly and the slip ring from moving up due to vibration, the spring will push the pressure plate to make the second slide bar slide in the limit frame. The pressure plate applies a downward thrust to the slip ring through the pressure block, increasing the resistance to the screw rotation, preventing it from rotating and driving the slip ring to move up. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort. Among them: Figure 1 The figure is a schematic diagram of the main structure of a locking device for a multi-rotation valve electric actuator according to the present invention.

[0020] Figure 2 The present invention is a schematic structural diagram of a locking unit, an auxiliary unit and an anti-loosening unit of a locking device for an electric actuator of a multi-rotation valve.

[0021] Figure 3 The figure is a structural schematic diagram of a locking unit of a locking device for an electric actuator of a multi-rotation valve according to the present invention.

[0022] Figure 4 This is a schematic diagram of the exploded structure of a locking unit of a locking device for a multi-rotary valve electric actuator of the present invention.

[0023] Figure 5 The figure is a structural schematic diagram of an auxiliary unit of a locking device for an electric actuator of a multi-rotation valve according to the present invention.

[0024] Figure 6 The figure is a schematic cross-sectional structural diagram of an auxiliary unit of a locking device for an electric actuator of a multi-rotation valve according to the present invention.

[0025] Figure 7 The figure is a structural schematic diagram of an anti-loosening unit of a locking device for an electric actuator of a multi-rotation valve according to the present invention.

[0026] Figure 8 This is a schematic diagram of the explosion structure of an anti-loosening unit of a locking device for an electric actuator of a multi-rotary valve of the present invention.

[0027] Description of the drawings: 100, multi-turn valve electric actuator; 101, output shaft; 102, handwheel; 200, locking unit; 300, auxiliary unit; 400, anti-loosening unit; 201, clamping ring; 202, fixing block; 203, first slide bar; 204, clamping block; 205, connecting plate; 206, connecting bar; 207, slip ring; 208, sleeve block; 209, screw; 301, first rubber ring; 302, first anti-slip ring; 303, fixing ring; 304, second rubber ring; 305, second anti-slip ring; 401, pressure block; 402, limit frame; 403, second slide bar; 404, spring; 405, pressure plate. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0031] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing the embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0032] Example 1 Reference Figure 1 and Figure 2 , which is the first embodiment of the present invention, provides a locking device for a multi-rotation valve electric actuator, comprising: A multi-rotary valve electric actuator 100, the top surface of which is rotatably connected to an output shaft 101, and a handwheel 102 is fixedly mounted on one end of the output shaft 101 away from the multi-rotary valve electric actuator 100; The locking unit 200 is placed above the multi-turn valve electric actuator 100. The locking unit 200 includes a clamping ring 201 and a clamping block 204. The clamping block 204, which is used for opposite movement, can clamp the outer wall of the clamping ring 201 to lock the output shaft 101 fixedly installed inside the clamping ring 201. The auxiliary unit 300 is placed inside the locking unit 200. The auxiliary unit 300 includes a first anti-slip ring 302 and a second anti-slip ring 305. The auxiliary unit 300 is used to prevent the output shaft 101 from rotating under the restriction of the two sets of first anti-slip rings 302 and second anti-slip rings 305 that are intertwined and squeezed with each other, thereby assisting in locking the output shaft 101. The anti-loosening unit 400 is placed on the outside of the locking unit 200. The anti-loosening unit 400 includes a pressure block 401, a spring 404 and a pressure plate 405. Under the elastic action of the spring 404, the pressure block 401 can be pressed by the pressure plate 405. The pressure block 401 applies downward pressure to the slip ring 207 to prevent the screw 209 from rotating due to vibration, thereby making it inconvenient to lock the output shaft 101.

[0033] When in use, the output shaft 101 can be locked under the restriction of the locking unit 200 and the auxiliary unit 300. Under the restriction of the anti-loosening unit 400, the screw 209 in the locking unit 200 can be prevented from misrotating due to vibration, thereby assisting in restricting the locking unit 200.

[0034] Example 2 Reference Figure 3 and Figure 4 , which is the second embodiment of the present invention. Different from the previous embodiment, this embodiment is further optimized based on the above embodiment, specifically as follows: The locking unit 200 includes a clamping ring 201 fixedly mounted on the outer wall of the output shaft 101, a fixed block 202 fixedly mounted on the top surface of the multi-turn valve electric actuator 100, a first slide rod 203 slidingly arranged inside the fixed block 202, a clamping block 204 fixedly mounted on the end of the first slide rod 203, a connecting plate 205 hingedly connected to the side of the clamping block 204 close to the first slide rod 203, a connecting bar 206 hingedly connected to the end of the connecting plate 205 away from the clamping block 204, a slip ring 207 fixedly mounted on the end of the connecting bar 206, a sleeve block 208 fixedly mounted on the outer wall of the slip ring 207, and a screw 209 sleeved inside the sleeve block 208.

[0035] Among them, the clamping block 204 is clamped with the clamping ring 201. There are two clamping blocks 204, which are symmetrically distributed with respect to the center of the output shaft 101. Under the restriction of the two clamping blocks 204 moving in opposite directions, they can be clamped with the outer wall of the clamping ring 201 to lock the output shaft 101.

[0036] Among them, the interior of the slip ring 207 is slidingly arranged with the outer wall of the output shaft 101, and the end of the screw 209 is rotatably connected to the top surface of the multi-turn valve electric actuator 100. Under the sliding restriction of the slip ring 207 and the output shaft 101, the rotating screw 209 drives the slip ring 207 to slide on the outer wall of the output shaft 101.

[0037] During use, after the output shaft 101 has completed its rotation, the screw 209 is rotated. Since the bottom end of the screw 209 is rotationally connected to the top surface of the multi-turn valve electric actuator 100, and the interior of the slip ring 207 is slidingly arranged with the outer wall of the output shaft 101, under its restriction, the rotating screw 209 drives the sleeve block 208 and the slip ring 207 to move downward. Since the end of the connecting plate 205 is hinged to the connecting bar 206 and the block 204, under its restriction, the downward moving slip ring 207 cooperates with the connecting bar 206 to push the block 204 through the connecting plate 205. The first sliding rod 203 fixedly installed on the side of the connecting plate 205 of the block 204 slides inside the fixed block 202, so that the two blocks 204 can move stably in opposite directions and engage with the clamping ring 201 fixedly installed on the outer wall of the output shaft 101 to lock the output shaft 101.

[0038] Example 3 Reference Figure 5 and Figure 6 , which is the third embodiment of the present invention. Different from the previous embodiment, this embodiment is further optimized based on the above embodiment, specifically as follows: The auxiliary unit 300 includes a first rubber ring 301 fixedly mounted on the bottom of the slip ring 207, a first anti-slip ring 302 fixedly mounted on the bottom of the first rubber ring 301, a fixed ring 303 fixedly mounted on the outer wall of the output shaft 101, a second rubber ring 304 fixedly mounted on the top surface of the fixed ring 303, and a second anti-slip ring 305 fixedly mounted on the top surface of the second rubber ring 304.

[0039] Among them, the interior of the first rubber ring 301 is slidingly arranged with the outer wall of the output shaft 101, and the first anti-slip ring 302 and the second anti-slip ring 305 are provided with anti-slip strips on the side away from the first rubber ring 301 and the second rubber ring 304. Under the restriction of the anti-slip strips, the first rubber ring 301 drives the first anti-slip ring 302 to contact and squeeze the second rubber ring 304 and the second anti-slip ring 305, thereby assisting in locking the output shaft 101.

[0040] During use, when the slip ring 207 moves downward, it drives the first rubber ring 301 to move downward, causing the first anti-slip ring 302 to contact and squeeze the second anti-slip ring 305. Under the restriction of the first rubber ring 301 and the second rubber ring 304, the output shaft 101 is auxiliary locked. Since the first anti-slip ring 302 and the second anti-slip ring 305 are staggered, the output shaft 101 can be prevented from rotating under their restriction.

[0041] Example 4 Reference Figure 7 and Figure 8 , which is the fourth embodiment of the present invention. Different from the previous embodiment, this embodiment is further optimized based on the above embodiment, specifically as follows: The anti-loosening unit 400 includes a pressure block 401 fixedly mounted on the outer wall of the slip ring 207, a limit frame 402 is slidingly arranged on the outer wall of the pressure block 401, a second slide rod 403 is slidingly arranged inside the limit frame 402, a spring 404 is sleeved on the outer wall of the second slide rod 403, and a pressure plate 405 is fixedly mounted on the end of the second slide rod 403.

[0042] Among them, one end of the second slide rod 403 is fixedly installed on the top surface of the pressure plate 405, and the end of the second slide rod 403 away from the pressure plate 405 is fixedly installed on the inner side of the limit frame 402. Under the elastic action of the second slide rod 403, the pressure plate 405 can be pushed, and the pressure plate 405 applies a downward thrust to the pressure block 401 and the slip ring 207 to prevent vibration from driving the screw 209 to rotate and causing the slip ring 207 to move upward.

[0043] The outer wall of the pressing plate 405 is slidably arranged with the inner side of the limiting frame 402 , and the pressing plate 405 is arranged parallel to the pressing block 401 . Under the restriction of the pressing plate 405 , the screw rod 209 can be prevented from rotating.

[0044] During use, when the slip ring 207 moves downward, the two clamping blocks 204 move in opposite directions and engage with the clamping ring 201. Under its restriction, it is necessary to avoid the screw 209 from rotating incorrectly due to the vibration environment, causing the slip ring 207 to move upward. At this time, under the elastic action of the spring 404, the pressure plate 405 can be pushed to make the second slide bar 403 slide inside the limit frame 402. The pressure plate 405 applies a downward thrust to the slip ring 207 through the pressure block 401. At this time, the rotation of the screw 209 is limited by resistance, preventing it from rotating and driving the slip ring 207 to move upward.

[0045] It is worth noting that the entire device is controlled by a controller. Since the controller is a commonly used device and belongs to existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0046] It should be understood that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, the development effort will be a routine task of design, fabrication, and production without undue experimentation.

[0047] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced, without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A locking device for a multi-turn valve electric actuator, characterized in that: include: A multi-rotation valve electric actuator (100), wherein the top surface of the multi-rotation valve electric actuator (100) is rotatably connected to an output shaft (101), and a hand wheel (102) is fixedly mounted on one end of the output shaft (101) away from the multi-rotation valve electric actuator (100); A locking unit (200), the locking unit (200) being placed above the multi-rotation valve electric actuator (100), the locking unit (200) comprising a clamping ring (201) and a clamping block (204), the clamping block (204) being adapted for opposite movement and capable of clamping against an outer wall of the clamping ring (201) to lock an output shaft (101) fixedly mounted inside the clamping ring (201); An auxiliary unit (300), the auxiliary unit (300) is placed inside the locking unit (200), and the auxiliary unit (300) includes a first anti-slip ring (302) and a second anti-slip ring (305), and is used to prevent the output shaft (101) from rotating under the restriction of the two sets of the first anti-slip ring (302) and the second anti-slip ring (305) that are interlaced and squeezed with each other, thereby assisting in locking the output shaft (101); An anti-loosening unit (400) is placed outside the locking unit (200). The anti-loosening unit (400) includes a pressure block (401), a spring (404) and a pressure plate (405). Under the elastic action of the spring (404), the pressure block (401) can be pressed by the pressure plate (405). The pressure block (401) applies downward pressure to the slip ring (207) to prevent the screw (209) from rotating due to vibration, thereby making it inconvenient to lock the output shaft (101).

2. The locking device for a multi-rotation valve electric actuator according to claim 1, characterized in that: A locking unit (200) includes a clamping ring (201) fixedly mounted on the outer wall of the output shaft (101), a fixing block (202) fixedly mounted on the top surface of the multi-turn valve electric actuator (100), a first sliding rod (203) slidably arranged inside the fixing block (202), and a clamping block (204) fixedly mounted on the end of the first sliding rod (203).

3. The locking device for a multi-rotation valve electric actuator according to claim 2, characterized in that: The clamping block (204) is hingedly connected to a connecting plate (205) on one side close to the first sliding rod (203), and the connecting plate (205) is hingedly connected to a connecting bar (206) on one end away from the clamping block (204). A slip ring (207) is fixedly installed on the end of the connecting bar (206), and a sleeve block (208) is fixedly installed on the outer wall of the slip ring (207). A screw rod (209) is sleeved inside the sleeve block (208).

4. The locking device for a multi-rotation valve electric actuator according to claim 2, characterized in that: The clamping block (204) is clamped with the clamping ring (201), and there are two clamping blocks (204) symmetrically distributed around the center of the output shaft (101).

5. The locking device for a multi-rotation valve electric actuator according to claim 3, characterized in that: The interior of the slip ring (207) is slidably arranged with the outer wall of the output shaft (101), and the end of the screw (209) is rotatably connected to the top surface of the multi-rotation valve electric actuator (100).

6. The locking device for a multi-rotation valve electric actuator according to claim 1, characterized in that: An auxiliary unit (300) includes a first rubber ring (301) fixedly mounted on the bottom of the slip ring (207), a first anti-slip ring (302) fixedly mounted on the bottom of the first rubber ring (301), a fixed ring (303) fixedly mounted on the outer wall of the output shaft (101), a second rubber ring (304) fixedly mounted on the top surface of the fixed ring (303), and a second anti-slip ring (305) fixedly mounted on the top surface of the second rubber ring (304).

7. The locking device for a multi-rotation valve electric actuator according to claim 6, characterized in that: The interior of the first rubber ring (301) is slidably arranged with the outer wall of the output shaft (101), and the first anti-slip ring (302) and the second anti-slip ring (305) are provided with anti-slip strips on the side away from the first rubber ring (301) and the second rubber ring (304).

8. The locking device for a multi-rotation valve electric actuator according to claim 1, characterized in that: An anti-loosening unit (400) includes a pressure block (401) fixedly mounted on the outer wall of a slip ring (207), a limit frame (402) being slidably provided on the outer wall of the pressure block (401), a second slide rod (403) being slidably provided inside the limit frame (402), a spring (404) being sleeved on the outer wall of the second slide rod (403), and a pressure plate (405) being fixedly mounted on the end of the second slide rod (403).

9. The locking device for a multi-rotation valve electric actuator according to claim 8, characterized in that: One end of the second slide bar (403) is fixedly mounted on the top surface of the pressing plate (405), and one end of the second slide bar (403) away from the pressing plate (405) is fixedly mounted on the inner side of the limiting frame (402).

10. The locking device for a multi-rotation valve electric actuator according to claim 8, characterized in that: The outer wall of the pressing plate (405) is slidably arranged with the inner side of the limiting frame (402), and the pressing plate (405) is arranged parallel to the pressing block (401).

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