An adjustable electric actuator against overload

Abstract

The present invention discloses a regulating electric actuator with overload protection, which relates to the field of electromechanical control technology. The actuator includes a main body shell: including a mounting block provided on the main body shell; an output mechanism includes an output rod passing through the mounting block and slidably connected to the inner wall of the mounting block. A moving rack is fixedly installed on the surface of the output rod, and the moving rack meshes with a rotating gear. The rotating gear is rotatably connected to the inner wall of the mounting block. A linkage worm gear is coaxially and fixedly installed on the surface of the rotating gear. The linkage worm gear forms a worm and worm gear transmission with a rotating worm. The rotating worm is rotatably connected to the inner wall of the mounting block; a driving mechanism is used to drive the output rod to move horizontally; a backpressure mechanism cooperates with a pneumatic mechanism to stop the output rod from moving horizontally; through the combined action of the backpressure mechanism and the pneumatic mechanism, the driving action of the driving mechanism on the output mechanism is disconnected. At this time, the forward driving action of the driving mechanism becomes idling, so as to achieve the purpose of preventing overload and protecting the electric actuator.

Description

Technical Field

[0001] The present invention relates to the technical field of mechatronic control, and in particular to a regulating electric actuator with overload protection. Background Art

[0002] At present, with the development of science and technology, mechatronic control can be seen everywhere in people's lives. The convenience of using some devices has been increased through mechatronic control technology. The most common device using mechatronic control is the electric actuator. Instructions are sent to the motor through sensors, and then the movement of the output end of the electric actuator is completed through mechanical transmission, thereby completing the restriction of another component.

[0003] When using an electric controller currently, it may occur that when the electric actuator is moving, due to the abnormal misalignment of the restricted end, the movement of the output end of the electric actuator is restricted, resulting in overload operation of the output end. At this time, the internal motor of the electric actuator will be overheated and damaged due to overload. Currently, the existing overload protection devices on the market all protect the electric actuator through sensors. The sensitivity of such devices is unstable and the service life is not long, and false feedback is likely to occur.

[0004] Based on this, the present invention designs a regulating electric actuator with overload protection to solve the above problems. Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to provide a regulating electric actuator with overload protection, aiming to solve the technical problems existing in the prior art mentioned in the background art.

[0006] The embodiments of the present invention are implemented as follows. A regulating electric actuator with overload protection, the actuator includes:

[0007] Main body shell: including a mounting block provided on the main body shell;

[0008] Output mechanism: including an output rod passing through the mounting block and slidingly connected to the inner wall of the mounting block. A moving rack is fixedly installed on the surface of the output rod. The moving rack meshes with a rotating gear. The rotating gear is rotatably connected to the inner wall of the mounting block. A linkage turbine is coaxially and fixedly installed on the surface of the rotating gear. The linkage turbine forms a worm and worm gear transmission with a rotating worm. The rotating worm is rotatably connected to the inner wall of the mounting block;

[0009] Drive mechanism: used to drive the output rod to move horizontally;

[0010] Backpressure mechanism: makes the output rod stop moving horizontally by cooperating with the pneumatic mechanism.

[0011] Further, the driving mechanism includes a driving motor fixedly installed on the inner wall of the mounting block. The output end of the driving motor penetrates through the mounting block and is rotatably connected to the mounting block. A first bevel gear set is fixedly installed at the output end of the driving motor. A first arc gear is fixedly installed at the other end of the first bevel gear set. A support rod penetrates through the interiors of both the first bevel gear set and the first arc gear and is coaxially rotatably connected to the support rod. The first arc gear meshes with a second arc gear. A support rod penetrates through the interior of the second arc gear and is slidably connected to the support rod. The inner wall of the second arc gear is slidably connected to a second bevel gear set. The second bevel gear set is coaxially rotatably connected to the surface of the support rod. The support rod is fixedly installed on the inner wall of the mounting block. The other end of the second bevel gear set is coaxially fixedly connected to a rotating worm.

[0012] Furthermore, the backpressure mechanism includes a backpressure rod slidably connected to the inner wall of the output rod. The surface of the backpressure rod is connected to the inner wall of the output rod through a backpressure spring.

[0013] Furthermore, the pneumatic mechanism includes a pressure cylinder fixedly connected to the surface of the output rod. A pressure piston is slidably connected inside the pressure cylinder. The pressure piston is fixedly installed on the surface of the backpressure rod. The other end of the pressure cylinder is connected to a moving hose. The end of the moving hose away from the pressure cylinder is connected to a connecting pipe. The connecting pipe is fixedly installed on the inner wall of the mounting block. The end of the connecting pipe away from the moving hose is connected to a pressurized cylinder. And the pressure cylinder, the moving hose, the connecting pipe, and the pressurized cylinder are internally connected. A pressurized piston is slidably connected inside the pressurized cylinder. A linkage block is fixedly installed on the surface of the pressurized piston. The end of the linkage block away from the pressurized piston is rotatably connected to the second arc gear through a rotating ring. The inner wall of the second arc gear is connected to the second bevel gear set through a return spring.

[0014] Furthermore, the actuator further includes an adjustment mechanism. The adjustment mechanism includes an adjustment cylinder coaxially fixedly installed on the surface of the second arc gear. A rotating gear ring is rotatably installed on the inner wall of the adjustment cylinder. A driving gear that cooperates with the rotating gear ring is fixedly installed on the surface of the first bevel gear set. Two rotating lead screws penetrate through the interior of the rotating gear ring and are rotatably connected to the two rotating lead screws. A lead screw gear is coaxially fixedly installed on the surface of each rotating lead screw. Both lead screw gears mesh with a fixed gear ring. The fixed gear ring is fixedly installed on the inner wall of the adjustment cylinder. The rotating lead screw forms a screw pair drive with the L-shaped slider. The L-shaped slider is slidably connected to the rotating gear ring. A thrust rod is fixedly installed on the surface of the L-shaped slider. A limit block that cooperates with the thrust rod is fixedly installed on the surface of the adjustment cylinder.

[0015] Furthermore, a rigid rubber is fixedly installed on the surface of the backpressure rod.

[0016] Furthermore, a rigid rubber is fixedly installed on the contact surface of the limit block with the thrust rod.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. Through the combined action of the backpressure mechanism and the pneumatic mechanism, the present invention disconnects the transmission action of the driving mechanism on the output mechanism. At this time, the forward transmission action of the driving mechanism becomes idling, so as to achieve the purpose of preventing overload and protecting the electric actuator.

[0019] 2. The present invention drives the output rod to move in the reverse direction for resetting through the reverse rotation of the second arc gear, so that the output rod returns to the initial state, thus achieving automatic and precise resetting, without affecting the position of the output rod, and ensuring the normal use of the electric actuator in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a regulating electric actuator with overload protection provided by an embodiment of the present invention;

[0021] Figure 2 It is a schematic sectional view structure diagram of the present invention;

[0022] Figure 3 It is a schematic sectional view structure diagram of another perspective of a regulating electric actuator with overload protection of the present invention;

[0023] Figure 4 For the present invention Figure 3 The enlarged structural diagram at position A;

[0024] Figure 5 It is a schematic sectional view structure diagram of yet another perspective of a regulating electric actuator with overload protection of the present invention;

[0025] Figure 6 For the present invention Figure 5 The enlarged structural diagram at position B;

[0026] Figure 7 For the present invention Figure 6 The enlarged structural diagram at position C;

[0027] Figure 8 It is a schematic structural diagram of the installation position of the rotating worm of the present invention;

[0028] Figure 9 For the present invention Figure 8 The enlarged structural diagram at position D.

[0029] In the accompanying drawings: 1. Main body shell; 101. Mounting block; 2. Output mechanism; 201. Output rod; 202. Moving rack; 203. Rotating gear; 204. Linkage turbine; 205. Rotating worm; 3. Driving mechanism; 301. Driving motor; 302. First bevel gear set; 303. First arc gear; 304. Second arc gear; 305. Second bevel gear set; 306. Support rod; 4. Backpressure mechanism; 401. Backpressure rod; 402. Backpressure spring; 5. Pneumatic mechanism; 501. Pressure piston; 502. Pressure cylinder; 503. Moving hose; 504. Connecting pipe; 505. Compressed air cylinder; 506. Compressed piston; 507. Linkage block; 508. Return spring; 6. Adjusting mechanism; 601. Adjusting cylinder; 602. Rotating gear ring; 603. Driving gear; 604. Rotating lead screw; 605. Lead screw gear; 606. Fixed gear ring; 607. L-shaped slider; 608. Thrust rod; 609. Limit block. Detailed implementation manners

[0030] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] It can be understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but unless otherwise specified, these elements are not limited by these terms. These terms are only used to distinguish the first element from another element.

[0032] As Figure 1 and Figure 2 shown, in one embodiment, a regulating electric actuator with overload protection is proposed. The actuator includes:

[0033] Main body shell 1: including a mounting block 101 provided on the main body shell 1;

[0034] Output mechanism 2: including an output rod 201 passing through the mounting block 101 and slidingly connected to the inner wall of the mounting block 101. A moving rack 202 is fixedly installed on the surface of the output rod 201. The moving rack 202 meshes with a rotating gear 203. The rotating gear 203 is rotatably connected to the inner wall of the mounting block 101. A linkage turbine 204 is coaxially and fixedly installed on the surface of the rotating gear 203. The linkage turbine 204 forms a worm and worm gear transmission with a rotating worm 205. The rotating worm 205 is rotatably connected to the inner wall of the mounting block 101;

[0035] Driving mechanism 3: used to drive the output rod 201 to move horizontally;

[0036] Back-pressure mechanism 4: The output rod 201 is stopped from moving laterally by cooperating with the pneumatic mechanism 5.

[0037] In the actual application of the embodiment of the present invention, when the electric actuator receives an external feedback signal, such as Figure 2 As shown, at this time, the driving worm 205 is driven to rotate by the action of the driving mechanism 3. The rotation of the driving worm 205 drives the rotating gear 203 to rotate through the transmission of the worm and worm gear, and then drives the output rod 201 to move laterally through the meshing of the gear and rack. At this time, when the external mating parts are misaligned, due to the reaction force of the external parts, the back-pressure mechanism 4 moves in the reverse direction. At this time, through the combined action of the back-pressure mechanism 4 and the pneumatic mechanism 5, the driving action of the driving mechanism 3 on the output mechanism 2 is disconnected. At this time, the forward driving action of the driving mechanism 3 becomes idling, so as to achieve the purpose of preventing overload and protecting the electric actuator.

[0038] Such as Figure 2 、 Figure 5 And Figure 6 As shown, as a preferred embodiment of the present invention, the driving mechanism 3 includes a driving motor 301 fixedly installed on the inner wall of the mounting block 101. The output end of the driving motor 301 penetrates through the mounting block 101 and is rotatably connected to the mounting block 101. A first bevel gear set 302 is fixedly installed at the output end of the driving motor 301. The other end of the first bevel gear set 302 is fixedly installed with a first arc gear 303. A support rod 306 penetrates through the inside of the first bevel gear set 302 and the first arc gear 303 and is coaxially rotatably connected to the support rod 306. The first arc gear 303 meshes with the second arc gear 304. A support rod 306 penetrates through the inside of the second arc gear 304 and is slidably connected to the support rod 306. The inner wall of the second arc gear 304 is slidably connected to the second bevel gear set 305. The second bevel gear set 305 is coaxially rotatably connected to the surface of the support rod 306. The support rod 306 is fixedly installed on the inner wall of the mounting block 101. The other end of the second bevel gear set 305 is coaxially fixedly connected to the driving worm 205.

[0039] In the actual application of the embodiment of the present invention, when the electric actuator is working, at this time, the driving motor 301 is operated by an external feedback signal, such as Figure 2 As shown, the driving motor 301 drives the first bevel gear set 302 to rotate, such as Figure 6As shown in the figure, the second arc-shaped gear 304 is driven to rotate through the coaxial transmission and meshing action of the gears. The rotation of the second arc-shaped gear 304 drives the rotating worm 205 to rotate through the action of the second bevel gear set 305, thereby driving the output rod 201 to move horizontally. When an abnormality occurs, the first arc-shaped gear 303 and the second arc-shaped gear 304 are disengaged through the action of the back-pressure mechanism 4 and the pneumatic mechanism 5, so as to achieve the purpose of preventing overload.

[0040] As Figure 3 and Figure 4 shown, as another preferred embodiment of the present invention, the back-pressure mechanism 4 includes a back-pressure rod 401 slidably connected to the inner wall of the output rod 201, and the surface of the back-pressure rod 401 is connected to the inner wall of the output rod 201 through a back-pressure spring 402.

[0041] In the actual application of the embodiment of the present invention, when the output rod 201 moves horizontally, when the external parts are misaligned, the back-pressure rod 401 contacts the external parts at this time. As the output rod 201 continues to move, under the reaction of the external parts, as Figure 3 and Figure 4 shown, from Figure 4 the front view direction, the back-pressure rod 401 moves to the left, and then the first arc-shaped gear 303 and the second arc-shaped gear 304 are disengaged through cooperation with the pneumatic mechanism 5, achieving the purpose of preventing overload.

[0042] As Figure 3 and Figure 6 shown, as another preferred embodiment of the present invention, the pneumatic mechanism 5 includes a pressure air cylinder 502 fixedly connected to the surface of the output rod 201. A pressure piston 501 is slidably connected inside the pressure air cylinder 502. The pressure piston 501 is fixedly installed on the surface of the back-pressure rod 401. The other end of the pressure air cylinder 502 is connected to a moving hose 503. The end of the moving hose 503 away from the pressure air cylinder 502 is connected to a connecting pipe 504. The connecting pipe 504 is fixedly installed on the inner wall of the mounting block 101. The end of the connecting pipe 504 away from the moving hose 503 is connected to a pressure-receiving air cylinder 505. And the pressure air cylinder 502, the moving hose 503, the connecting pipe 504 and the pressure-receiving air cylinder 505 are internally connected. A pressure-receiving piston 506 is slidably connected inside the pressure-receiving air cylinder 505. A linkage block 507 is fixedly installed on the surface of the pressure-receiving piston 506. The end of the linkage block 507 away from the pressure-receiving piston 506 is rotatably connected to the second arc-shaped gear 304 through a rotating ring. The inner wall of the second arc-shaped gear 304 is connected to the second bevel gear set 305 through a return spring 508.

[0043] In the actual application of the embodiment of the present invention, when the back-pressure rod 401 moves to the left, as Figure 3 shown, from Figure 3Looking from the front view direction, at this time, it drives the pressure piston 501 to move leftward to squeeze the air in the pressure cylinder 502, and enters the pressure-receiving cylinder 505 through the air flow transmission action of the moving hose 503 and the connecting pipe 504. It should be noted here that since the output rod 201 will drive the pressure cylinder 502 to move synchronously during movement, the moving hose 503 is set as a flexible hose. When the pressure cylinder 502 moves, it changes the appearance stretching state of the moving hose 503, thereby avoiding changes in the internal air volume and affecting the air flow transmission effect. As Figure 6 shown, looking from Figure 6 the front view direction, at this time, the air flow drives the pressure-receiving piston 506 to move rightward, and then drives the second arc gear 304 to move rightward through the linkage block 507. The second arc gear 304 moves rightward and disengages from the first arc gear 303, achieving the purpose of overload prevention.

[0044] As Figure 7 、 Figure 8 and Figure 9 shown, as another preferred embodiment of the present invention, the actuator further includes an adjustment mechanism 6. The adjustment mechanism 6 includes an adjustment cylinder 601 coaxially and fixedly installed on the surface of the second arc gear 304. A rotating gear ring 602 is rotatably installed on the inner wall of the adjustment cylinder 601. A driving gear 603 that cooperates with the rotating gear ring 602 is fixedly installed on the surface of the first bevel gear set 302. Two rotating lead screws 604 penetrate through the inside of the rotating gear ring 602 and are rotatably connected to the two rotating lead screws 604. A lead screw gear 605 is coaxially and fixedly installed on the surface of each rotating lead screw 604. Both lead screw gears 605 are engaged with a fixed gear ring 606. The fixed gear ring 606 is fixedly installed on the inner wall of the adjustment cylinder 601. The rotating lead screw 604 forms a screw pair transmission with the L-shaped slider 607. The L-shaped slider 607 is slidably connected to the rotating gear ring 602. A thrust rod 608 is fixedly installed on the surface of the L-shaped slider 607. A limit block 609 that cooperates with the thrust rod 608 is fixedly installed on the surface of the adjustment cylinder 601.

[0045] In the actual application of the embodiment of the present invention, when the first arc gear 303 disengages from the second arc gear 304, as Figure 7 shown, looking from Figure 7Viewed from the front, the movement of the second arc-shaped gear 304 drives the adjusting cylinder 601 to move to the right at this time, so that the rotating gear ring 602 meshes with the driving gear 603. At this time, the continuous rotation of the first arc-shaped gear 303 drives the driving gear 603 to rotate. Through the meshing action of the gear and the gear ring, the rotating gear ring 602 is driven to rotate synchronously. The rotation of the rotating gear ring 602 drives the rotating lead screw 604 to revolve. Due to the meshing action between the rotating lead screw 604 and the lead screw gear 605, the lead screw gear 605 drives the rotating lead screw 604 to rotate self when revolving. It should be noted here that since the linkage turbine 204 and the rotating worm 205 are worm and worm gear transmissions, this way of transmitting the movement of the mechanism can achieve self-locking on the one hand, and on the other hand, the friction of the worm and worm gear transmission is relatively large. Therefore, the resistance of the worm and worm gear is greater than the resistance of the gear meshing transmission. Therefore, when the lead screw gear 605 rotates, the friction force of its transmission is not enough to drive the adjusting cylinder 601 to rotate, so as to realize the rationality of the mechanism movement through the intervention of the friction force. At this time, the rotating lead screw 604 drives the L-shaped slider 607 to move to the left through the screw pair transmission, so that the thrust rod 608 and the limit block 609 cannot be in contact, so as to record the remaining distance of the motor rotation through the movement of the thrust rod 608. When the lateral movement of the second arc-shaped gear 304 triggers the alarm feedback, the external staff resets at this time, and the motor starts to reverse. At this time, the reverse rotation of the first bevel gear set 302 drives the rotating gear ring 602 to reverse, and then the reverse rotation of the rotating lead screw 604 makes the L-shaped slider 607 move to the right. When the motor finishes moving the distance where the first arc-shaped gear 303 and the second arc-shaped gear 304 are disengaged, the thrust rod 608 returns to the initial position, as Figure 9 shown. The thrust rod 608 contacts the limit block 609 through the revolving action of the rotating gear ring 602. At this time, the thrust rod 608 drives the limit block 609 to rotate synchronously, and then drives the second arc-shaped gear 304 to reverse synchronously through the adjusting cylinder 601. And because the rotating gear ring 602 rotates synchronously with the adjusting cylinder 601, the rotating lead screw 604 no longer rotates self. At this time, the reverse rotation of the second arc-shaped gear 304 drives the output rod 201 to move in the reverse direction for resetting, so that the output rod 201 returns to the initial state, so as to achieve automatic and accurate resetting, without affecting the position of the output rod 201, and ensuring the normal use of the electric actuator in the later stage.

[0046] As Figure 2 shown, as another preferred embodiment of the present invention, a rigid rubber is fixedly installed on the surface of the back pressure rod 401.

[0047] When the embodiment of the present invention is actually applied, as Figure 2 shown, through the rigid rubber provided on the back pressure rod 401, it is avoided that when the back pressure rod 401 contacts with external parts in the later stage, the parts are scratched.

[0048] As shown Figure 9 As another preferred embodiment of the present invention, a hard rubber is fixedly installed on the contact surface of the limit block 609 that contacts the thrust rod 608.

[0049] In practical application of the embodiment of the present invention, through the hard rubber provided on the limit block 609, when the limit block 609 makes hard contact with the thrust rod 608, extrusion loss of the limit block 609 can be avoided, and the service life of the electric actuator can be increased.

[0050] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0051] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

[0052] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjustable electric actuator against overload, characterized in that The actuator comprises: A main body housing (1), which includes a mounting block (101) provided on the main body housing (1); An output mechanism (2), which includes an output rod (201) passing through the mounting block (101) and slidingly connected to the inner wall of the mounting block (101). A moving rack (202) is fixedly installed on the surface of the output rod (201). The moving rack (202) meshes with a rotating gear (203). The rotating gear (203) is rotatably connected to the inner wall of the mounting block (101). A linkage worm gear (204) is coaxially and fixedly installed on the surface of the rotating gear (203). The linkage worm gear (204) forms a worm and worm gear transmission with a rotating worm (205). The rotating worm (205) is rotatably connected to the inner wall of the mounting block (101); A driving mechanism (3) for driving the output rod (201) to move transversely; A backpressure mechanism (4) which, in cooperation with a pneumatic mechanism (5), causes the output rod (201) to stop moving transversely; The backpressure mechanism (4) includes a backpressure rod (401) slidingly connected to the inner wall of the output rod (201). The surface of the backpressure rod (401) is connected to the inner wall of the output rod (201) through a backpressure spring (402); The pneumatic mechanism (5) includes a pressure air cylinder (502) fixedly connected to the surface of the output rod (201). A pressure piston (501) is slidably connected inside the pressure air cylinder (502). The pressure piston (501) is fixedly installed on the surface of the backpressure rod (401). The other end of the pressure air cylinder (502) is connected to a moving hose (503). The end of the moving hose (503) away from the pressure air cylinder (502) is connected to a connecting pipe (504). The connecting pipe (504) is fixedly installed on the inner wall of the mounting block (101). The end of the connecting pipe (504) away from the moving hose (503) is connected to a pressurized air cylinder (505). The pressure air cylinder (502), the moving hose (503), the connecting pipe (504) and the pressurized air cylinder (505) are internally connected. A pressurized piston (506) is slidably connected inside the pressurized air cylinder (505). A linkage block (507) is fixedly installed on the surface of the pressurized piston (506). The end of the linkage block (507) away from the pressurized piston (506) is rotatably connected to a second arc-shaped gear (304) through a rotating ring. The inner wall of the second arc-shaped gear (304) is connected to a second bevel gear set (305) through a return spring (508).

2. The adjustable electric actuator against overload according to claim 1, characterized in that, The driving mechanism (3) includes a driving motor (301) fixedly installed on the inner wall of the mounting block (101). The output end of the driving motor (301) penetrates the mounting block (101) and is rotatably connected to the mounting block (101). A first bevel gear set (302) is fixedly installed at the output end of the driving motor (301). A first arc gear (303) is fixedly installed at the other end of the first bevel gear set (302). A support rod (306) penetrates through the interior of both the first bevel gear set (302) and the first arc gear (303) and is coaxially rotatably connected to the support rod (306). The first arc gear (303) meshes with the second arc gear (304). A support rod (306) penetrates through the interior of the second arc gear (304) and is slidably connected to the support rod (306). The inner wall of the second arc gear (304) is slidably connected to a second bevel gear set (305). The second bevel gear set (305) is coaxially rotatably connected to the surface of the support rod (306). The support rod (306) is fixedly installed on the inner wall of the mounting block (101). The other end of the second bevel gear set (305) is coaxially fixedly connected to the rotating worm (205).

3. The adjustable electric actuator for overload prevention according to claim 2, characterized in that, The actuator further includes an adjusting mechanism (6). The adjusting mechanism (6) includes an adjusting cylinder (601) coaxially fixedly installed on the surface of the second arc gear (304). A rotating gear ring (602) is rotatably installed on the inner wall of the adjusting cylinder (601). A driving gear (603) that cooperates with the rotating gear ring (602) is fixedly installed on the surface of the first bevel gear set (302). Two rotating lead screws (604) penetrate through the interior of the rotating gear ring (602) and are rotatably connected to the two rotating lead screws (604). A lead screw gear (605) is coaxially fixedly installed on the surface of each rotating lead screw (604). Both of the two lead screw gears (605) mesh with a fixed gear ring (606). The fixed gear ring (606) is fixedly installed on the inner wall of the adjusting cylinder (601). The rotating lead screw (604) forms a screw pair transmission with the L-shaped slider (607). The L-shaped slider (607) is slidably connected to the rotating gear ring (602). A thrust rod (608) is fixedly installed on the surface of the L-shaped slider (607). A limiting block (609) that cooperates with the thrust rod (608) is fixedly installed on the surface of the adjusting cylinder (601).

4. The adjustable electric actuator for overload prevention according to claim 1, characterized in that, A rigid rubber is fixedly installed on the surface of the back pressure rod (401).

5. The adjustable electric actuator against overload according to claim 3, characterized in that, A rigid rubber is fixedly installed on the contact surface of the limiting block (609) that contacts the thrust rod (608).

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