Anti-locked-rotor and anti-explosion electric actuating mechanism

Abstract

The invention discloses an anti-locked-rotor and anti-explosion electric actuating mechanism, and relates to the technical field of anti-explosion electric actuators, the anti-locked-rotor and anti-explosion electric actuating mechanism comprises a push rod component and a push rod capable of stretching up and down, a microswitch is arranged on one side of the push rod, and the microswitch comprises an upper limit switch and a lower limit switch which are respectively arranged on the side surface of the push rod; the push rod part is connected with a gear box assembly with a spiral gear, and the gear box assembly drives the push rod part to move; the gear box assembly is connected with a motor part for providing power for the spiral gear; the motor component is connected with a driver assembly and controls operation of the motor component, the problems that multiple sections of gears of a speed reducer part in an electric actuating mechanism are meshed, the structure is complex, damage is prone to occurring, and noise is large are solved, the using conditions of explosive occasions are met, and the problems that an electric actuator in the existing market cannot achieve abnormal induction and cannot achieve abnormal operation due to the fact that a brush motor is adopted can be solved. And locked-rotor automatic protection is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of explosion-proof electric actuators, and in particular to an anti-jamming explosion-proof electric actuator. Background Art

[0002] The control actuators for emergency start doors and windows have high protection requirements, especially explosion-proof performance. The existing technologies mostly use brush structures, which may cause sparks when turning, and cannot meet the requirements for use in explosion-proof occasions. In addition, they have a short lifespan and require regular maintenance. Existing electric actuators mostly use 4 or 5 sets of gear reduction and are formed by metal processing. Not only do they have the problem of sparks when meshing at high speeds, they are not suitable for use in explosion-proof occasions, and the processing costs are high.

[0003] For example, there is a Chinese patent with publication number CN218829457U, which involves a new type of oil-immersed explosion-proof electric push rod, including a power mechanism, a transmission mechanism and a push rod mechanism. The power cord of the power mechanism is connected by an explosion-proof gland, the power mechanism adopts a miniature explosion-proof motor, the inner cavity of the transmission mechanism and the inner cavity of the push rod mechanism are connected through an oil guide cavity, the inner cavity of the transmission mechanism and the inner cavity of the push rod mechanism are both provided with lubricating oil, the installation joint method is changeable, the electrical explosion-proof can also suppress mechanical sparks, the impact resistance is good, and the new type of explosion-proof electric push rod device is easy to maintain. However, the Chinese patent with publication number CN218829457U adopts lubricating oil to achieve explosion-proof. It is true that lubricating oil can reduce the friction of gears and reduce noise. However, the use of lubricating oil will also bring new problems. Industrial lubricating oil is expensive and difficult to maintain. Not only does it need to be replaced and inspected regularly to ensure the normal operation of the equipment, but industrial lubricating oil is harmful to the human body and is not suitable for long-term contact. Improper handling of waste lubricating oil will also cause environmental pollution. Summary of the invention

[0004] In order to solve the problem that electric actuators are difficult to meet explosion-proof requirements, the present invention proposes an anti-jam explosion-proof electric actuator, which solves the problems of multi-section gear meshing, complex structure, easy damage and high noise in the reducer part of the electric actuator, meets the use conditions in explosive occasions, and can also solve the problem that electric actuators in the existing market use brushed motors that cannot achieve abnormal sensing and autonomous jam protection.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an anti-blocking and explosion-proof electric actuator, It includes a push rod component, which has a push rod that can be extended up and down. A micro switch is provided on one side of the push rod. The micro switch includes an upper limit switch and a lower limit switch respectively arranged on the side of the push rod; the push rod component is connected to a gear box assembly with a helical gear, and the gear box assembly drives the push rod component to move; the gear box assembly is connected to a motor component that provides power for the helical gear; the motor component is connected to a driver assembly to control the operation of the motor component.

[0006] In this technical solution, a sparkless PMSM high-efficiency motor is used to replace the brush motor. The motor adopts a brushless commutation structure, has a long life and high efficiency, so that the operation of the actuator is efficient and reliable. The reducer part of the explosion-proof electric actuator adopts a helical gear structure made of high-strength POM500, which replaces the existing multi-group gear reduction structure. It has the characteristics of simple structure, low processing cost and reliable operation. An anti-stall program is set in the control drive to prevent the motor from being in an overload state under abnormal circumstances, causing damage to the actuator and operating equipment.

[0007] Preferably, the helical gear includes a second gear and a first gear having a helical gear portion, a worm gear portion is connected to the outer side of one end of the helical gear portion, and the worm gear portion is coaxially connected to the helical gear portion.

[0008] Preferably, the motor component includes a rotating shaft, and the outer surface of one end of the rotating shaft is provided with helical teeth, the helical teeth are meshed with the worm wheel part of the first gear and transmit in one direction, and the helical teeth drive the first gear to rotate.

[0009] Preferably, the second gear meshes with the first gear, a fixing piece is provided in the center of the second gear to prevent the screw and the second gear from rotating relative to each other axially, the push rod component is provided with a screw, one end of the screw is connected to the fixing piece, and the second gear and the screw rotate coaxially and synchronously.

[0010] Preferably, the first gear and the second gear are integrally formed from high-strength non-metallic material.

[0011] Preferably, the outer surface of the screw rod is connected with a push rod connector, and the push rod connector is fixedly connected with a push rod. When the push rod is fully pushed out, an upper limit switch is triggered, and when the push rod is fully retracted, a lower limit switch is triggered.

[0012] Preferably, the driver assembly comprises a driver provided with a driving board, the driver is connected to a motor lead wire, the motor lead wire is connected to an explosion-proof connector, and a control chip is provided on the driving board.

[0013] Preferably, the driving board includes at least two XOR gates, an input pin of the first XOR gate is connected to the lower limit switch, an input pin of the second XOR gate is connected to the upper limit switch, and the output end of the first XOR gate is connected to an input end of the second XOR gate.

[0014] Preferably, the driving board is provided with a connector element, and the connector element is connected to a power source.

[0015] Preferably, the driver comprises a controller, and the controller adopts PWM speed regulation and is controlled by a position signal.

[0016] The beneficial effects of the present invention are: 1) It adopts a design that meets explosion-proof requirements and can be used in explosion-proof situations; 2) The worm gear structure is formed by one-piece injection molding, which has a simple structure and reliable operation; 3) It realizes autonomous anti-jamming to prevent damage to the actuator and load equipment; 4) Precise control, able to meet the needs of high-precision and high-requirement occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an anti-jamming and explosion-proof electric actuator of the present invention.

[0018] Figure 2 It is an exploded diagram of an anti-jamming and explosion-proof electric actuator of the present invention.

[0019] Figure markings: drive assembly 1; drive 1-1; drive base 1-1-1; drive cover 1-1-2; drive plate 1-1-3; motor lead wire 1-2; explosion-proof connector 1-3; motor component 2; oil seal 2-1; first bearing 2-2; O-ring 2-3; front end cover 2-4; rotating shaft 2-5; stator core 2-6; second bearing 2-7; housing 2-8; nameplate 2-8-1; warning label 2-8-2; push rod component 3; push rod 3-1; push rod cover plate 3-2; push rod housing 3-3; micro switch 3-4; screw 3-5; push rod connector 3-6; plane bearing 3-7; gear box assembly 4; gear box upper cover 4-1; gear box lower cover 4-2; first gear 4-3; second gear 4-4. DETAILED DESCRIPTION

[0020] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation method described herein is only an optimal embodiment of the present invention, which is only used to explain the present invention and does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] Example 1 This embodiment provides an anti-blocking explosion-proof electric actuator, which is mainly used for emergency start-up of doors and windows in the energy storage industry under explosion-proof occasions, including a driver component 1, a motor component 2, a push rod component 3 and a gear box component 4. Figure 1 It adopts a design that meets explosion-proof requirements and can be used in explosion-proof occasions such as energy storage, coal mining, and dust processing.

[0022] Most of the electric actuators in the prior art are of brush structure, which may produce sparks when turning, and cannot meet the requirements of use in explosion-proof occasions. At the same time, they also have many disadvantages such as short life and need for regular maintenance.

[0023] The present invention adopts a self-designed permanent magnet synchronous motor to replace the brushless motor in the prior art as the power motor. The structure of the motor component 2 is referenced to Figure 1 It avoids the problem of sparks when the brush structure is turned. It is safe and reliable, has high precision, can meet the explosion-proof requirements, and has a small size and strong overload capacity.

[0024] The motor components include a cylindrical casing 2-8 and a rotating shaft 2-5 located at the center of the casing. A stator core 2-6 is provided on the outer periphery of the rotating shaft. The stator core is also inside the casing. On the outer periphery of the rotating shaft, one end of the stator core is connected to a front end cover 2-4, which adopts a wide stop fit. One end of the rotating shaft is connected to a first bearing 2-2, and the other end is connected to a second bearing 2-7. The first bearing is connected to an oil seal 2-1. A plurality of grooves are provided on the outer periphery of the front end cover, and O-rings 2-3 are provided in the grooves to play a sealing role and prevent water and dust.

[0025] In this embodiment, the casing is integrally formed, and is also provided with a nameplate 2-8-1 for identification, and a warning label 2-8-2. The warning label can be pasted on the outside of the casing or nailed on the casing to serve as a warning to prevent accidents.

[0026] The overall design adopts a high protection IP67 mechanism, the motor part adopts an integrated die-casting process, and the front cover adopts a wide stop to meet the dual needs of explosion-proof and protection. Waterproof O-rings or waterproof glue are used in each connection part, and an O-ring design is also added to the push rod part to meet the protection requirements.

[0027] The outer surface of one end of the rotating shaft is provided with helical teeth to form a worm structure, which is connected to the gear box assembly.

[0028] The gearbox assembly 4 consists of a gearbox upper cover 4-1, a gearbox lower cover 4-2 and two helical gears. The two helical gears are a first gear 4-3 and a second gear 4-4. The second gear meshes with the first gear and is arranged in a space enclosed by the gearbox upper cover and the gearbox lower cover.

[0029] Among them, the first gear is formed by a helical gear part and a worm wheel part coaxially connected. The tooth surface of the worm wheel part is a spiral concave surface. The worm structure formed by the helical teeth of the worm wheel part and one end of the rotating shaft cooperates for transmission. When the worm rotates, the worm wheel part will be driven to rotate, thereby realizing power transmission and achieving the effect of the rotating shaft driving the first gear to rotate.

[0030] Due to the structural characteristics of the worm gear transmission, it can achieve a larger transmission ratio and achieve a good deceleration effect.

[0031] It is worth noting that the transmission between the helical teeth and the worm wheel is a one-way transmission. The worm is the active part of the transmission, and the worm wheel is the driven part. It has a self-locking function during the transmission process. Only when the helical teeth rotate, the worm wheel will be driven to rotate, and vice versa.

[0032] The spiral shape of the worm wheel tooth surface causes the torque generated by the worm to be decomposed into two components: axial force and radial force. Among them, the radial force will generate a moment along the spiral tooth surface of the worm wheel that tends to separate the worm wheel from the worm.

[0033] When an external force causes the worm wheel to rotate, the torque generated by the radial force of the worm will cause the worm wheel to produce a reverse torque, thereby offsetting the external force and making the worm wheel unable to rotate freely, achieving a self-locking effect.

[0034] The one-way transmission of the helical teeth and worm gear can effectively avoid load reversal or loss of control, improve the stability and safety of the transmission, and protect the safe operation of the motor.

[0035] The push rod component 3 includes a screw 3-5. A fixing piece is provided in the center of the second gear to prevent the screw and the second gear from rotating relative to each other axially. One end of the screw is connected to the fixing piece, and the second gear drives the screw to rotate coaxially and synchronously.

[0036] The helical gear is difficult to be injection molded due to its special shape and structure. To solve this problem, a special mold with a special flow channel and parting surface can be specially designed. In this embodiment, the helical gear is made of high-strength POM500 material.

[0037] The gearbox assembly of the present invention replaces the existing multi-group gear reduction structure with helical gears, and has the characteristics of simple structure, low processing cost and reliable operation. It solves the problems of multi-section gear meshing, complex structure, easy damage and high noise in the reducer part of the electric actuator.

[0038] The gearbox assembly of this embodiment only needs two helical gears to achieve deceleration and transmission, effectively avoiding the complex structure of traditional electric actuators using 4 or 5 groups of gear deceleration. The first gear and the second gear are both integrally formed from high-strength non-metallic materials, and will not generate sparks when rotating, which can meet explosion-proof requirements and effectively avoid the problem of metal gears easily generating sparks when meshing. In addition, the use of non-metallic helical gears has lower costs.

[0039] The push rod component includes a push rod cover plate 3-2 and a push rod housing 3-3. A micro switch 3-4 is also provided on one side of the push rod in the push rod housing. The micro switch includes an upper limit switch and a lower limit switch. The upper limit switch is triggered when the push rod 3-1 is extended to the maximum limit, and the lower limit switch is triggered when the push rod is fully retracted. The push rod and the screw are connected by a push rod connector 3-6. A plane bearing 3-7 is connected to the side of the screw close to the gear box assembly.

[0040] The push rod housing is fixedly connected to the gear box upper cover of the gear box assembly, the push rod cover is connected to one end of the push rod housing, the screw rotates in the push rod housing, a through hole is provided on the push rod cover, and the push rod connecting machine drives the push rod to pass through the through hole and move up and down in the push rod housing.

[0041] like Figure 2 As shown, the outer surface of the screw is connected to a push rod connector 3-6, which can be regarded as a nut that matches the screw. The inner surface of the push rod connector is provided with a thread that matches the thread of the screw. The outer surface of the push rod connector is also provided with a connecting piece for fixed connection with the push rod 3-1.

[0042] In this embodiment, the connecting piece on the outer surface of the push rod connector is also threaded, and the inner surface of the push rod is provided with a thread matching the threaded piece, and the two are fixedly connected together by the thread.

[0043] The transmission process is described in detail below.

[0044] After the motor is turned on, the shaft of the drive motor component rotates, and the shaft transmits power to the first gear. The first gear drives the second gear to rotate, and the second gear causes the screw connected to it to rotate synchronously. The rotation of the screw causes the push rod connector on the screw to move up and down, thereby realizing the extension and retraction of the push rod.

[0045] The driver assembly 1 includes a driver 1-1, a motor lead wire 1-2 and an explosion-proof connector 1-3. Both ends of the driver are connected to the motor lead wires, and the motor lead wires are connected to the explosion-proof connectors. One of the explosion-proof connectors is connected to the motor component to realize the driver's driving control of the motor.

[0046] The driver is composed of a driving base 1-1-1, a driving cover 1-1-2 and a driving plate 1-1-3 arranged between the driving base and the driving cover.

[0047] The permanent magnet synchronous motor of this embodiment adopts a brushless commutation structure, which can convert rotational motion into linear motion. The motor housing and the lead access device both adopt an explosion-proof structural design, thereby achieving the explosion-proof structural requirements.

[0048] The present invention is also equipped with a high-precision controlled PWM type controller, adopts a position signal control mode, and has the advantages of precise positioning and strong anti-interference ability.

[0049] Due to the nonlinear and multivariable characteristics of permanent magnet synchronous motors, their control is difficult and the control algorithm is complex. Traditional vector control methods often cannot meet the requirements.

[0050] This embodiment uses a method combining a non-inductive field oriented control loop and a phase-locked loop to control the permanent magnet synchronous motor. The sliding mode observer (SMO) estimates the speed of the motor and estimates the precise position and rotation speed of the rotor in real time.

[0051] The controller includes a current loop and a speed loop dual closed loop. The current loop is regulated by a PI controller. The current sampling mode adopts a dual resistor sampling mode. The sampled current is amplified and filtered, and then transformed by Clark and Park to finally obtain the feedback Id and Iq to form a closed-loop control.

[0052] The speed loop also uses a PI controller to implement feedback regulation. The speed sampling of the motor is estimated by the sliding mode observer, and the output of the speed loop PI controller is the input of the current loop PI controller.

[0053] In this embodiment, an anti-blocking explosion-proof electric actuator is applied to the control actuator of the shutter of the energy storage cabinet, which is used to open and close the shutter. When the motor is at the lower limit switch, the shutter is in a closed state and can only respond to the upper computer's window opening command. When the motor runs to the upper limit switch, the motor automatically stops running and can only respond to the upper computer's window closing command. The control logic is realized on the basis of hardware through the analog speed control input interface of the motor and the motor steering control input interface and logic circuits such as AND or OR gates.

[0054] The specific hardware circuit design is explained in detail below.

[0055] The driver board is provided with a control chip. In the present embodiment, the control chip may be a motor driver integrated chip of model FT8132Q. The circuit design is performed with the control chip as the core to realize sensorless FOC.

[0056] The driving board is also provided with a connector, which is connected to a power supply. The connector may be a pin header. In the present embodiment, the connector uses a three-row pin header, which is connected to the power supply through a resistor, so as to facilitate flexible replacement of the power supply.

[0057] The driving board includes at least two XOR gates, at least one input pin of the first XOR gate is connected to the lower limit switch, at least one input pin of the second XOR gate is connected to the upper limit switch, and the output end of the first XOR gate is connected to an input end of the second XOR gate.

[0058] Specifically, the motor steering control input interface controls the movement direction of the push rod through the logic level, and the limit switch is connected to the analog speed control input interface, and the push rod is controlled to be pushed out or retracted through the logic results of the two interfaces.

[0059] In this embodiment, the first XOR gate is a single-channel dual-input XOR gate, and the second XOR gate is a single-channel three-input XOR gate.

[0060] The first XOR gate of this embodiment uses a single-channel dual-input XOR gate of the SN74AHC1G86DBVR model, and the second XOR gate uses a single-channel three-input XOR gate of the SN74LVC1G0832DBVR model.

[0061] It should be noted that in some other implementations, other types of XOR gates may also be selected to still achieve the same technical effect.

[0062] The first input pins of the first XOR gate and the second XOR gate are both DIR pins, which control the direction of the push rod's movement through logic levels. When DIR is 1, the push rod's movement direction is upward, and when DIR is 0, the push rod's movement direction is downward.

[0063] In this embodiment, the limit switch 5V pull-up normally open contact, when not triggered, the pin reads a high level, when triggered it reads a low level, a high level indicates a normal or safe state, a low level indicates an abnormal or action state, the logic becomes 0 when closed in place, and the logic is 1 when open out of place.

[0064] The second input pin of the first XOR gate is connected to the lower limit switch, that is, when the push rod reaches the upper limit, the second input pin of the first XOR gate obtains a logic low level input, and the second input pin of the second XOR gate is connected to the upper limit switch, when the push rod reaches the lower limit, the second input pin of the second XOR gate obtains a logic low level input.

[0065] The output of the first XOR gate is the XOR of the two input pins, that is, Y=A'•B+A•B'. The third input pin of the second XOR gate is connected to the output of the first XOR gate. The output of the second XOR gate is the input of the first input pin, the result of the AND operation of the second input pin, and the input of the third input pin, performed an OR operation, that is, Y=(A•B)+C. The second XOR gate performs Boolean operations based on the logic inputs of the two XOR gates to obtain the following 6 different situations.

[0066] In the first case, DIR is 1, the upper limit switch is 0, and the lower limit switch is 1. At this time, the push rod is at the upper limit, the control direction is upward, DIR XOR lower limit gets the first XOR gate output is FALSE, DIR and the upper limit result is FALSE, DIR and the upper limit result is ORed with the first XOR gate output to get the second XOR gate result is FALSE, the motor running state is shutdown, and the push rod reaches the upper limit and stops moving upward.

[0067] In the second case, DIR is 0, the upper limit switch is 0, and the lower limit switch is 1. At this time, the push rod is at the upper limit, and the control direction is downward. The DIR XOR lower limit obtains the first XOR gate output as TRUE, and the result of DIR and the upper limit is FALSE. The result of DIR and the upper limit is ORed with the output of the first XOR gate to obtain the result of the second XOR gate as TRUE. The motor running state is the push rod retracting, and the push rod starts to retract from the upper limit.

[0068] In the third case, DIR is 0, the upper limit switch is 1, and the lower limit switch is 1. At this time, the push rod is located between the upper limit and the lower limit, and the control direction is downward. The DIR XOR lower limit obtains the first XOR gate output as TRUE, and the result of DIR and the upper limit is FALSE. The result of DIR and the upper limit is ORed with the output of the first XOR gate to obtain the result of the second XOR gate as TRUE. The motor running state is that the push rod is retracted, and the push rod continues to retract after leaving the upper limit.

[0069] In the fourth case, DIR is 0, the upper limit switch is 1, and the lower limit switch is 0. At this time, the push rod is at the lower limit, and the control direction is downward. The DIR XOR lower limit obtains the first XOR gate output as FALSE, and the result of DIR and the upper limit is FALSE. The result of DIR and the upper limit is ORed with the output of the first XOR gate to obtain the result of the second XOR gate as FALSE. The motor running state is shutdown, and the push rod reaches the lower limit and stops moving downward.

[0070] In the fifth case, DIR is 1, the upper limit switch is 1, and the lower limit switch is 0. At this time, the push rod is at the lower limit, and the control direction is upward. The DIR XOR lower limit obtains the first XOR gate output as TRUE, and the result of DIR and the upper limit is TRUE. The result of DIR and the upper limit is ORed with the output of the first XOR gate to obtain the result of the second XOR gate as TRUE. The motor running state is push rod push out, and the push rod starts to push out from the lower limit.

[0071] In the sixth case, DIR is 1, the upper limit switch is 1, and the lower limit switch is 1. At this time, the push rod is located between the upper limit and the lower limit, and the control direction is upward. The DIR XOR lower limit obtains the first XOR gate output as FALSE, and the result of DIR and the upper limit is TRUE. The result of DIR and the upper limit is ORed with the output of the first XOR gate to obtain the result of the second XOR gate as TRUE. The motor running state is push rod push out, and the push rod continues to push out after leaving the lower limit.

[0072] The anti-jam and explosion-proof electric actuator of the present embodiment realizes the motor motion control logic through a combination of logic circuits, and has a faster response speed.

[0073] The control method of sliding mode observer plus phase-locked loop has a fast response speed. Due to the characteristics of the sliding mode, the sliding mode controller has the characteristics of fast response, which can enable the system to quickly reach the desired state, and does not require accurate motor models and states, and has good adaptability.

[0074] The sliding mode observer is insensitive to system parameter changes and disturbances, and is highly robust to system parameter uncertainties and external disturbances, enabling the system to maintain the microphone mode under the influence of uncertainty and disturbances.

[0075] Compared with some complex control methods, sliding mode control is relatively simple, easy to implement and apply, making the entire drive physical implementation simple and reducing the implementation cost.

[0076] The dynamic sliding mode control of the present invention can effectively suppress the chattering phenomenon of the conventional sliding mode controller while maintaining the original advantages of the sliding mode control, and has the characteristics of fast response speed and strong ability to resist external interference.

[0077] The drive can automatically detect stalls based on the results of the observer, achieving autonomous stall prevention and preventing damage to the actuator and load equipment.

[0078] The anti-jam and explosion-proof electric actuator of the present invention adopts a permanent magnet synchronous motor as the power of the electric actuator, and is externally connected to an independently designed control circuit. The circuit and motor parts both adopt a structural design that meets the explosion-proof requirements. The use of this structure effectively avoids the use of a brush structure in existing electric actuators, which has the phenomenon of sparks when turning and cannot meet the requirements for use in explosion-proof occasions. It can meet the requirements for use in explosion-proof occasions.

[0079] At the same time, it adopts an injection-molded spiral gear structure with a simple structure, reliable operation and low cost. It effectively avoids the problems of traditional electric actuators that mostly use 4 or 5 sets of gear reduction and metal processing, sparks during high-speed meshing, are not suitable for use in explosion-proof occasions and have high processing costs. The independently designed controller hardware structure has precise control and can meet the needs of high-precision and high-requirement occasions.

[0080] The anti-jamming explosion-proof electric actuator of the present invention abandons the conventional IP54 protection level adopted in the prior art and adopts a new structural design, which can meet the protection requirements of IP67 and can meet the occasions with high protection requirements.

Claims

1. An anti-blocking and explosion-proof electric actuator, characterized in that: It includes a push rod component, which has a push rod that can be extended up and down. A micro switch is provided on one side of the push rod. The micro switch includes an upper limit switch and a lower limit switch respectively arranged on the side of the push rod; the push rod component is connected to a gear box assembly with a helical gear, and the gear box assembly drives the push rod component to move; the gear box assembly is connected to a motor component that provides power for the helical gear; the motor component is connected to a driver assembly to control the operation of the motor component.

2. The anti-blocking and explosion-proof electric actuator according to claim 1, characterized in that: The helical gear includes a second gear and a first gear having a helical gear portion. A worm gear portion is connected to the outer side of one end of the helical gear portion. The worm gear portion is coaxially connected to the helical gear portion.

3. The anti-blocking and explosion-proof electric actuator according to claim 2 is characterized in that: The motor component includes a rotating shaft, and the outer surface of one end of the rotating shaft is provided with helical teeth, the helical teeth are meshed with the worm wheel part of the first gear and transmit in one direction, and the helical teeth drive the first gear to rotate.

4. The anti-blocking and explosion-proof electric actuator according to claim 2, characterized in that: The push rod component is provided with a screw, the second gear is meshed with the first gear, a fixing piece is provided in the center of the second gear to prevent the screw and the second gear from rotating relative to each other axially, one end of the screw is connected in the fixing piece, and the second gear and the screw rotate coaxially and synchronously.

5. The anti-blocking and explosion-proof electric actuator according to claim 2, characterized in that: The first gear and the second gear are both integrally formed from high-strength non-metallic material.

6. The anti-blocking and explosion-proof electric actuator according to claim 4, characterized in that: The outer surface of the screw rod is connected with a push rod connector, and the push rod connector is fixedly connected with a push rod. When the push rod is fully pushed out, the upper limit switch is triggered, and when the push rod is fully retracted, the lower limit switch is triggered.

7. The anti-blocking and explosion-proof electric actuator according to claim 1, characterized in that: The driver assembly comprises a driver provided with a driving board, the driver is connected with a motor lead wire, the motor lead wire is connected with an explosion-proof connector, and a control chip is provided on the driving board.

8. The anti-blocking and explosion-proof electric actuator according to claim 7, characterized in that: The driving board includes at least two XOR gates, an input pin of the first XOR gate is connected to the lower limit switch, an input pin of the second XOR gate is connected to the upper limit switch, and the output end of the first XOR gate is connected to an input end of the second XOR gate.

9. The anti-blocking and explosion-proof electric actuator according to claim 7 or 8, characterized in that: The driving board is provided with a connector element, and the connector element is connected to a power source.

10. The anti-blocking and explosion-proof electric actuator according to any one of claims 1 to 8, characterized in that: The driver comprises a controller, and the controller adopts PWM speed regulation and is controlled by a position signal.

Images