Explosion-proof servo motor

Abstract

The invention discloses an explosion-proof servo motor, and relates to the technical field of explosion-proof servo motors, the explosion-proof servo motor comprises a shell and a servo driver arranged in the shell, and the shell is provided with a rear end cover; the fan blades are fixed to a motor shaft of the servo driver, the purpose of dissipating heat in the servo driver and the shell through the fan blades is achieved, a filter screen plate is arranged on the shell, a cleaning unit matched with the filter screen plate is arranged in the shell, and dust at the filter screen plate is cleaned through the cleaning unit; the junction box is arranged on the servo driver, a groove used for bearing the junction box is formed in the shell, a junction pipe is fixed to the junction box, and a pressing piece is arranged on the junction pipe; according to the invention, the shaft body and the scraper blade are driven to stably rotate through a meshing transmission mechanism of the toothed ring and the straight gear, the filter screen plate is continuously cleaned, dust accumulation and blockage are avoided, the influence on heat dissipation of the servo driver is prevented, a good heat dissipation effect of the servo driver is ensured, and the reliability is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of explosion-proof servo motors, in particular to an explosion-proof servo motor. Background Art

[0002] An explosion-proof servo motor is a motor specially designed for use in hazardous environments. It can operate safely in explosive gas environments. This motor is specially designed and treated to prevent internal or external sparks from causing explosions, thereby ensuring the safety of equipment and personnel. The main features of an explosion-proof servo motor include its explosion-proof structure and explosion-proof grade. Common explosion-proof grades include explosion-proof type and increased safety type. These motors usually use special explosion-proof materials and sealing measures to ensure safe operation in explosive environments. In addition, explosion-proof servo motors are usually marked with corresponding explosion-proof signs to indicate their explosion-proof grades and applicable explosive environments.

[0003] The application fields of explosion-proof servo motors are very wide, mainly including chemical plants, oil refineries, coal mines and other places where flammable and explosive substances such as combustible gas, steam or dust exist. Due to its ability to operate stably in dangerous environments, explosion-proof servo motors play an important role in these fields to ensure the safety and smooth progress of production.

[0004] Chinese Patent Publication No. (CN113364191B) "discloses an explosion-proof servo motor, including a shell, a front end cover is provided at the front end of the shell, a rear end cover is provided at the rear end of the shell, a rotating shaft, a rotor winding and a stator are provided in the shell, two ends of the rotating shaft are rotatably penetrated on the front end cover and the rear end cover respectively, a cover shell is installed on the rear end cover, an explosion-proof mechanism is installed on the shell, the explosion-proof mechanism includes a first explosion-proof component and a second explosion-proof component, the first explosion-proof component is fixedly installed on the shell, the second explosion-proof component is installed on the first explosion-proof component, and a closure is installed between the first explosion-proof component and the second explosion-proof component, which is used to solve the problem that when an explosion occurs inside the servo motor, the flame of the explosion cannot be extinguished in time and ignites external combustible gas, or the combustible gas and dust outside the motor explode, which may cause the combustible gas or dust inside the motor to explode." Although the above patent document can solve the problem of explosion of combustible gas or dust inside the motor, it cannot ensure the heat dissipation performance of the servo motor under long-term use.

[0005] The existing explosion-proof servo motors use a casing that can withstand the internal explosion pressure to prevent the explosion from spreading outward. However, due to factors such as dust during the long-term use of the explosion-proof servo motor, the air outlet of the casing is easily clogged by dust, thereby affecting the normal heat dissipation performance of the explosion-proof servo motor and affecting the normal use performance of the explosion-proof servo motor. For this reason, we propose an explosion-proof servo motor. Summary of the invention

[0006] The purpose of the present invention is to provide an explosion-proof servo motor to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: an explosion-proof servo motor, comprising a housing and a servo driver arranged in the housing, wherein a rear end cover is arranged on the housing;

[0008] Also includes:

[0009] The fan blades are fixed on the shaft of the servo drive, and the purpose of the fan blades is to dissipate heat from the servo drive and the housing. A filter plate is provided on the housing, and a cleaning unit matching the filter plate is provided in the housing, and the cleaning unit is used to clean the dust on the filter plate;

[0010] A junction box is arranged on the servo drive, and a groove for supporting the junction box is provided on the housing, a wiring tube is fixed on the junction box, and a clamping piece is arranged on the wiring tube, and the clamping piece is used to clamp the power line;

[0011] The mounting assembly is arranged on the outer shell and is used for disassembling and assembling the rear end cover and the outer shell.

[0012] Preferably, the cleaning unit comprises:

[0013] A connecting frame fixed to the shaft of the servo driver, a toothed ring is fixed on the connecting frame, a support plate is fixed in the housing, a shaft body is rotatably connected to the support plate, and a spur gear meshing with the toothed ring is fixed on one end of the shaft body;

[0014] The scraper is fixed to one end of the shaft, and the scraper is in contact with the filter plate. The dust and impurities on the filter plate are cleaned by rotating the scraper.

[0015] Preferably, the pressing member comprises:

[0016] An installation groove is provided, which is connected to the installation groove on the wiring tube, and a bracket is fixed on the wiring tube, a screw rod is rotatably connected to the bracket through a screw hole, a knob is fixed on one end of the screw rod, and a pressure ring is rotatably connected to the other end of the screw rod;

[0017] A connecting block is fixed on the wiring tube, and a guide rod is fixed on the connecting block for the pressure ring to slide through, and a rubber block is fixed on one side wall of the pressure ring close to the wiring tube.

[0018] Preferably, the installation assembly includes:

[0019] A mounting seat is fixed on the housing, and a mounting rod for mounting the rear end cover is fixed on the mounting seat, and an additional mounting seat is fixed on the housing, and a small hole for the mounting rod to pass through is opened on the additional mounting seat;

[0020] The mounting plate is fixed to the mounting plate on the rear end cover. A through hole is provided on the mounting plate for the mounting rod to pass through, and a threaded groove is provided on the mounting rod. The rear end cover and the shell are fixed by connecting a nut a with the threaded groove.

[0021] Preferably, a positioning post is fixed on the filter plate, and a positioning hole engaged with the positioning post is provided on the shell, a cross plug plate is fixed on the positioning post, and a slot matched with the cross plug plate is provided on the shell.

[0022] Preferably, a rubber protective ring is fixed on the wiring tube, a limiting block is fixed at one end of the guide rod, and the diameter of the limiting block is larger than the diameter of the guide rod.

[0023] Preferably, a base is fixed on the shell, a reserved hole is opened on the base, and an anti-slip gasket is fixed on the base.

[0024] Preferably, a circular groove is formed on the rear end cover, and a grille circular plate is arranged in the circular groove, and the central axis of the grille circular plate is arranged in a colinear relationship with the central axis of the filter plate.

[0025] Preferably, a connecting seat is fixed on the rear end cover, and a threaded rod is fixed on the connecting seat. A mounting hole for the threaded rod to pass through is opened on the grille circular plate. A nut b is threadedly connected to the threaded rod, and the grille circular plate is fixed by the nut b.

[0026] Preferably, the diameter of the rear end cover is larger than the diameter of the outer shell, and the thickness of the outer shell is larger than the thickness of the rear end cover, the base cross section is T-shaped, a rubber sealing ring a is fixed on the outer shell, and a rubber sealing ring b in contact with the rubber sealing ring a is fixed on the rear end cover.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The present invention can effectively drive the shaft and the scraper to rotate continuously and stably through the meshing transmission mechanism of the toothed ring and the spur gear. This continuous rotation enables the scraper to continuously and evenly clean the filter screen, which can effectively avoid the dust accumulation and clogging problems caused by long-term use of the filter screen, and can effectively prevent the influence of dust accumulation on the heat dissipation of the servo drive, thereby not only ensuring that the servo drive has a good heat dissipation effect during use, but also ensuring the heat dissipation performance under long-term working conditions. This good heat dissipation performance further improves the stability and service life of the servo drive, and has higher reliability.

[0029] (2) The present invention passes the power cord through a specially designed wiring tube and ensures that the power cord correctly passes through the internal channel of the wiring tube, and then accurately connects the end of the power cord to the wiring terminal in the junction box. After the connection is completed, the operator only needs to simply turn the knob to easily achieve a secure clamping and accurate positioning of the power cord, which not only greatly improves the efficiency of the wiring work and makes the entire process faster and more convenient, but also effectively avoids the problem of power cord falling off or short circuit caused by unstable installation, which not only ensures the safe operation of the electrical equipment, but also reduces the extra time and cost caused by fault repair.

[0030] (3) The present invention rotates the nut b in sequence and continuously performs this action until the nut b is completely separated from the threaded rod, thereby completely releasing the limiting effect on the grille circular plate. In this way, the grille circular plate can be easily removed to facilitate subsequent maintenance and repair work. After the grille circular plate is removed, it is not only convenient to maintain the grille circular plate itself, but also greatly improves the convenience of maintaining the interior of the rear end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the back view structure of the present invention;

[0033] Figure 3 It is a schematic diagram of the overall side section structure of the present invention;

[0034] Figure 4 It is a structural schematic diagram of the filter plate in the present invention;

[0035] Figure 5 It is a schematic diagram of the top view structure of the present invention;

[0036] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0037] Figure 7 This is a schematic diagram of the explosion structure at the grid circular plate in the present invention;

[0038] Figure 8 for Figure 7 Enlarged view of point B in the middle;

[0039] Fig. 9 It is a schematic diagram of the structure of the toothed ring and the spur gear in the present invention;

[0040] Fig.10 for Fig. 9 Enlarged view of point C in the middle;

[0041] Fig.11It is a structural schematic diagram of the cleaning unit in the present invention;

[0042] Fig.12 It is a schematic diagram of the explosion structure of the installation component in the present invention;

[0043] Fig.13 It is a schematic diagram of the explosion structure at the filter plate in the present invention;

[0044] Fig.14 for Fig.13 A magnified schematic diagram of the structure of the middle D region;

[0045] Fig.15 It is a schematic diagram of the side section structure of the outer shell in the present invention.

[0046] In the figure: 1, housing; 2, servo drive; 3, rear end cover; 4, fan blade; 5, filter plate; 6, cleaning unit; 601, connecting frame; 602, toothed ring; 603, support plate; 604, shaft; 605, spur gear; 606, scraper; 7, junction box; 8, groove; 9, wiring tube; 10, clamping piece; 101, mounting groove; 102, bracket; 103, screw hole; 104, screw rod; 105, knob; 106, pressure ring; 107, connecting block; 108, guide rod; 109, rubber block; 11, installation assembly; 1101, installation Seat; 1102, mounting rod; 1103, additional seat; 1104, small hole; 1105, additional plate; 1106, through hole; 1107, threaded groove; 1108, nut a; 12, positioning column; 13, positioning hole; 14, cross plug plate; 15, slot; 16, rubber protection ring; 17, limit block; 18, base; 19, reserved hole; 20, anti-slip gasket; 21, round groove; 22, grille round plate; 23, connecting seat; 24, threaded rod; 25, mounting hole; 26, nut b; 27, rubber sealing ring a; 28, rubber sealing ring b. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Example 1

[0049] See also Figure 1-Figure 15An explosion-proof servo motor shown in the figure includes a shell 1 and a servo driver 2 arranged in the shell 1, a rear end cover 3 is arranged on the shell 1, the shell 1 is made of stainless steel, stainless steel has extremely strong corrosion resistance, especially in a humid, acidic or alkaline environment, it can resist oxidation, corrosion and rust, and also includes fan blades 4, the fan blades 4 fixed on the shaft of the servo driver 2, the fan blades 4 are used to dissipate heat for the servo driver 2 and the shell 1, a filter plate 5 is arranged on the shell 1, the filter plate 5 is made of metal material, and the shape of the filter plate 5 is circular, which is more in line with the shape of the overall device, and a cleaning unit 6 matched with the filter plate 5 is arranged in the shell 1, and the cleaning unit 6 is used to clean dust from the filter plate 5.

[0050] It should be noted that the servo driver 2 is mainly composed of two parts: a power board and a control board. The power board is responsible for driving the motor, while the control board is the control core of the system. The power board includes a power drive unit and a switching power supply unit. The power drive unit is used to drive the motor, while the switching power supply unit provides digital and analog power supplies for the entire servo system. The control board outputs pulse width modulation or pulse frequency modulation signals through an algorithm to control the output power of the inverter, thereby realizing control of the AC servo motor. The servo driver 2 here is a conventional setting in this field, so it will not be described in detail here.

[0051] The junction box 7 is arranged on the servo driver 2, and a groove 8 for supporting the junction box 7 is opened on the outer shell 1. The junction box 7 extends to the outside of the outer shell 1 through the groove 8, and is used to connect the power line to drive the servo driver 2 to work. A wiring tube 9 is fixed on the junction box 7, and a clamping piece 10 is arranged on the wiring tube 9, which is used to clamp the power line.

[0052] It should be noted that the junction box 7 mainly includes a junction box 7 base 18, a junction box 7 cover, a sealing element and a waterproof component. The junction box 7 base 18 is provided with an incoming line terminal and an outgoing line terminal. The side end of the base 18 is also connected to a waterproof component for enhancing the waterproof performance. The junction box 7 base 18 is sealed and connected to the servo driver 2 through a sealing element at the bottom, and is connected to the junction box 7 cover through a sealing element at the top, and is connected to the waterproof component at the side through a sealing element, thereby forming an overall structure with a simple structure and fewer connection links, which effectively reduces the possibility of leakage. This is a conventional setting in the field, so it will not be described in detail here.

[0053] The mounting component 11 is arranged on the shell 1, and is used for disassembling and assembling the rear end cover 3 and the shell 1. A base 18 is fixed on the shell 1. The optimal number of bases 18 is two, and the two bases 18 are symmetrically distributed and fixed on the shell 1, so as to form a supporting effect on the shell 1. A reserved hole 19 is opened on the base 18. Through the setting of the pre-designed reserved hole 19, in the actual use process in the later stage, the device can be easily fixed firmly to the predetermined use position with bolts. In addition, an anti-skid gasket 20 is also installed on the base 18. The anti-skid gasket 20 itself has certain elastic properties. In the process of installing and fixing the base 18, the anti-skid gasket 20 can provide the necessary pre-tightening force to ensure the stability and safety of the device. At the same time, the anti-skid gasket 20 also has excellent anti-skid performance, which can effectively prevent the device from slipping or displacement during use, thereby further improving the overall safety and reliability of use.

[0054] Among them, the diameter of the rear end cover 3 is larger than the diameter of the outer shell 1. By utilizing the size settings of the rear end cover 3 and the outer shell 1, the rear end cover 3 can be more smoothly inserted into the surface of the outer shell 1 for installation, and the thickness of the outer shell 1 is larger than the thickness of the rear end cover 3. By increasing the thickness of the outer shell 1, the explosion-proof strength of the outer shell 1 can be significantly improved. The cross-section of the base 18 is set in a T shape. By utilizing the setting of the shape of the base 18, a relatively stable supporting effect can be formed for the device. A rubber sealing ring a27 is fixed on the outer shell 1, and a rubber sealing ring b28 in contact with the rubber sealing ring a27 is fixed on the rear end cover 3. In the process of plugging the rear end cover 3 with the outer shell 1, the rubber sealing ring b28 on the rear end cover 3 will be in close contact and fit with the rubber sealing ring a27 on the outer shell 1. The close contact and fit can significantly improve the connection sealing performance between the outer shell 1 and the rear end cover 3, thereby effectively preventing the leakage of liquid or gas and ensuring the sealing and reliability of the equipment.

[0055] In the present solution, when the servo driver 2 is used for work, the power cord is electrically connected to the junction box 7 and passed through the wiring tube 9, and the power cord in the wiring tube 9 is compressed by the clamping member 10 to prevent the power cord from being short-circuited due to displacement during use. The servo driver 2 is operated, and its shaft rotates synchronously with it, driving the cleaning unit to operate synchronously, thereby continuously cleaning the filter plate 5 to achieve the purpose of cleaning and preventing blockage. When the rear end cover 3 needs to be removed for maintenance, each nut a1108 is rotated in turn until the nut a1108 is separated from the thread groove 1107, and then the limit on the rear end cover 3 is released, and the rear end cover 3 can be separated from the outer shell 1.

[0056] Further Figure 3 , Fig.10 , Fig.11 , Fig.13 and Fig.15 As shown, it is worth specifically explaining that the cleaning unit 6 includes a connecting frame 601, which is fixed on the shaft of the servo drive 2. The cross-sectional shape of the connecting frame 601 is concave, and the connecting frame 601 is fixed to the shaft by a connecting ring to ensure that the connecting frame 601 can run synchronously with the shaft of the servo drive 2, and a toothed ring 602 is fixed on the connecting frame 601, and the central axis of the toothed ring 602 is colinear with the central axis of the shaft of the servo drive 2. A support plate 603 is fixed in the outer shell 1, and the optimal number of support plates 603 is three, and the three support plates 603 are equidistantly distributed and fixed on the inner wall of the outer shell 1, and a shaft body 604 is rotatably connected to the support plate 603. Similarly, the number of shaft bodies 604 is also set to three, and a spur gear 605 meshing with the toothed ring 602 is fixed at one end of the shaft body 604.

[0057] The scraper 606 is fixed to one end of the shaft 604, and three shaft scrapers 606 are fixed to one end of each rotating shaft, and the angle between each scraper 606 is 120°, and each scraper 606 is in a non-contact state, so as to prevent the scraper 606 from contacting and causing jamming during operation, and the scraper 606 is in contact with the filter plate 5, and the filter plate 5 is fixed with a positioning column 12, and the positioning column 12 is set in a cylindrical shape, and the number of the positioning column 12 is There are four positioning posts 12 which are symmetrically arranged at four corners, and the outer shell 1 is provided with positioning holes 13 which engage with the positioning posts 12. A cross plug plate 14 is fixed on the positioning posts 12. The cross plug plate 14 is made of a deformable material. When the cross plug plate 14 is plugged into the slot 15, the filter plate 5 can be fixed to the outer shell 1 very compactly. The outer shell 1 is provided with a slot 15 which is compatible with the cross plug plate 14. The dust and impurities on the filter plate 5 can be cleaned by rotating the scraper 606.

[0058] It should be noted that, by using the connecting frame 601 to rotate synchronously with the shaft of the servo driver 2, the connecting frame 601 is used to drive the toothed ring 602 to rotate, and the meshing transmission mechanism of the toothed ring 602 and the spur gear 605 can effectively drive the rotating shaft and the scraper 606 to rotate continuously, so that the scraper 606 can continuously clean the filter screen 5. In this way, the dust accumulation and blockage caused by long-term use of the filter screen 5 can be effectively avoided, thereby preventing the situation of affecting the heat dissipation of the servo driver 2. It not only ensures that the servo driver 2 has a good heat dissipation effect during use, but also ensures the heat dissipation performance under long-term working conditions, further improving the stability and service life of the servo driver 2.

[0059] In this solution, when the servo driver 2 is used for operation, its working principle is as follows:

[0060] First, the servo driver 2 is driven to make the fan blades 4 operate synchronously, and the heat in the housing 1 is discharged by forced convection, thereby maintaining the normal working temperature of the servo driver 2;

[0061] Secondly, when the servo driver 2 is in operation, the connecting frame 601 rotates synchronously with its shaft, driving the toothed ring 602 to rotate synchronously, and utilizing the meshing transmission effect between the toothed ring 602 and the spur gear 605, the rotating shaft rotates after receiving force, and then drives the shaft body 604 to rotate synchronously and continuously, so that the scraper 606 scrapes and cleans the surface of the filter plate 5, thereby achieving the purpose of cleaning the filter plate 5;

[0062] Then, when the filter plate 5 needs to be disassembled, the nut a1108 is rotated in sequence by using a tool until the nut a1108 is separated from the thread groove 1107 on the mounting rod 1102, and then the limiting state of the rear end cover 3 is released, and the rear end cover 3 can be pulled out and separated from the housing 1;

[0063] Finally, the filter plate 5 is pulled until the cross plug plate 14 is separated from the slot 15, thereby completing the disassembly of the filter plate 5.

[0064] Embodiment 2:

[0065] Based on Example 1, Figure 3 , Figure 6 , Figure 7 and Fig. 9 As shown, it is worth specifically explaining that the clamping member 10 includes a mounting groove 101, which is opened with the mounting groove 101 on the wiring tube 9. The mounting groove 101 is opened at the middle position of the wiring tube 9, and a bracket 102 is fixed on the wiring tube 9. The bracket 102 is concave in shape, and the angle between the bracket 102 and the wiring tube 9 is right angled. A screw rod 104 is rotatably connected to the bracket 102 through a screw hole 103, and a knob 105 is fixed to one end of the screw rod 104. When the knob 105 is rotated, the threaded transmission between the threaded rod 24 and the screw hole 103 performs a spiral movement, and the other end of the screw rod 104 is rotatably connected to a pressure ring 106, and the pressure ring 106 is semicircular in shape, so that it has stronger stability when the power cord is compressed and positioned.

[0066] A connecting block 107 is fixed to the connecting block 107 on the wiring tube 9, and a guide rod 108 is fixed on the connecting block 107 for the pressure ring 106 to slide through. Two connecting blocks 107 and two guide rods 108 are provided, and a rubber block 109 is fixed to a side wall of the pressure ring 106 close to the wiring tube 9. The rubber block 109 is arranged in an arc shape to ensure that when the electrical clamping is positioned, the rubber block 109 first contacts with the power line, so that the power line clamping and positioning work can be completed more tightly.

[0067] It should be noted that when the device needs to be connected to electricity for use, after passing the power cord through the wiring tube 9 and connecting the power cord to the wiring terminals in the wiring box 7, the power cord can be clamped and positioned stably and quickly by simply turning the knob 105. This not only improves the wiring efficiency, but also avoids the situation where the power cord falls off and short-circuits due to unstable installation.

[0068] In this solution, when the servo driver 2 is used for operation, the working principle of the power cord is as follows:

[0069] First, the power supply wiring work is completed by passing the power supply line through the wiring tube 9 and connecting the wiring terminal to the wiring terminal in the wiring box 7;

[0070] Secondly, the power cord needs to be pressed and positioned. By turning the knob 105, the screw rod 104 is rotated synchronously. The threaded transmission between the screw rod 104 and the screw hole 103 is used to generate a pressure and push force on the pressure ring 106. When the pressure ring 106 is subjected to the force, it moves linearly along the surface of the guide rod 108.

[0071] Then, during the movement of the pressing ring 106, the rubber block 109 contacts the power line in advance, thereby squeezing the power line, thereby pressing the power line tightly between the wiring tube 9 and the pressing ring 106, and then completing the work of pressing and positioning the power line.

[0072] Embodiment 3:

[0073] This embodiment further describes other embodiments. Figure 1 , Figure 2 , Figure 5 , Figure 7 , Fig.12 and Fig.15 As shown, it is worth explaining in detail that the mounting assembly 11 includes a mounting seat 1101, the optimal number of mounting seats 1101 is four, and the four mounting seats 1101 are fixed at four diagonal points of the outer shell 1, and the angles between each mounting seat 1101 are right angles, the mounting seat 1101 fixed on the outer shell 1, and the mounting seat 1101 is fixed with a mounting rod 1102 for installing the rear end cover 3, and an additional mounting seat 1103 is fixed on the outer shell 1, and the additional mounting seat 1103 is provided with a small hole 1104 for the mounting rod 1102 to pass through.

[0074] The mounting plate 1105 is fixed to the mounting plate 1105 on the rear end cover 3. The mounting plate 1105 is provided with a through hole 1106 for the mounting rod 1102 to pass through. The aperture value of the through hole 1106 provided on the mounting plate 1105 is consistent with the aperture value of the small hole 1104 provided on the mounting seat 1103, and the mounting rod 1102 is provided with a threaded groove 1107, which is connected to the threaded groove 1107 through a nut a1108 to fix the rear end cover 3 and the outer shell 1.

[0075] It should be noted that, by rotating each nut a1108 one by one in turn, the nut a1108 and the thread groove 1107 are gradually separated through the threaded transmission action between the nut a1108 and the thread groove 1107, until the nut a1108 is completely separated from the thread groove 1107, thereby completely releasing the limiting effect between the rear end cover 3 and the outer shell 1. In this way, the connection between the rear end cover 3 and the outer shell 1 is completely released, and the rear end cover 3 can be easily removed from the outer shell 1. Compared with the traditional installation method, the device can achieve a higher degree of fit when installing the rear end cover 3 on the outer shell 1, ensuring a close combination between the two, thereby significantly improving the overall sealing performance.

[0076] Specifically, a connecting seat 23 is fixed on the rear end cover 3, and there are two connecting seats 23. The two connecting seats 23 are symmetrically distributed and fixed on the inner wall of the rear end cover 3, and a threaded rod 24 is fixed on the connecting seat 23. A mounting hole 25 for the threaded rod 24 to pass through is opened on the grille circular plate 22. A nut b26 is threadedly connected to the threaded rod 24, and the grille circular plate 22 is fixed by the nut b26.

[0077] When the grille circular plate 22 needs to be disassembled, the nut b26 is gradually rotated in sequence until the nut b26 is separated from the threaded rod 24, thereby releasing the limit on the grille circular plate 22 and removing the grille circular plate 22, making it convenient to maintain and repair the grille circular plate 22 after disassembly, and also convenient to maintain the rear end cover 3.

[0078] The servo driver 2 can be purchased from the market and equipped with a separate power supply, which is a mature technology in this field and has been fully disclosed, so it will not be repeated in the specification.

[0079] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0080] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof servo motor, comprising: A housing (1) and a servo driver (2) arranged in the housing (1), wherein a rear end cover (3) is arranged on the housing (1); It is characterized by further comprising: A fan blade (4) fixed on the shaft of the servo driver (2), the fan blade (4) is used to dissipate heat from the servo driver (2) and the housing (1), a filter plate (5) is provided on the housing (1), and a cleaning unit (6) matched with the filter plate (5) is provided in the housing (1), and the cleaning unit (6) is used to clean dust from the filter plate (5); A junction box (7) is arranged on the servo driver (2), and a recess (8) for supporting the junction box (7) is provided on the housing (1), a junction tube (9) is fixed on the junction box (7), and a pressing piece (10) is provided on the junction tube (9), and the pressing piece (10) is used to press the power line; A mounting assembly (11) is arranged on the housing (1) and is used for mounting and dismounting the rear end cover (3) and the housing (1).

2. The explosion-proof servo motor according to claim 1, characterized in that: The cleaning unit (6) comprises: A connecting frame (601) is fixed to the connecting frame (601) on the shaft of the servo driver (2), and a toothed ring (602) is fixed on the connecting frame (601), a supporting plate (603) is fixed in the housing (1), a shaft (604) is rotatably connected to the supporting plate (603), and a spur gear (605) meshingly connected to the toothed ring (602) is fixed on one end of the shaft (604); The scraper (606) is fixed to one end of the shaft (604), and the scraper (606) is in contact with the filter plate (5). The dust and impurities on the filter plate (5) are cleaned by the rotation of the scraper (606).

3. The explosion-proof servo motor according to claim 1, characterized in that: The pressing member (10) comprises: The mounting groove (101) is provided with the mounting groove (101) on the wiring tube (9), and a bracket (102) is fixed on the wiring tube (9), a screw rod (104) is rotatably connected to the bracket (102) through a screw hole (103), a knob (105) is fixed to one end of the screw rod (104), and a pressure ring (106) is rotatably connected to the other end of the screw rod (104); A connecting block (107) is fixed to the connecting block (107) on the wiring tube (9), and a guide rod (108) is fixed on the connecting block (107) for the pressure ring (106) to slide through, and a rubber block (109) is fixed on a side wall of the pressure ring (106) close to the wiring tube (9).

4. The explosion-proof servo motor according to claim 1, characterized in that: The installation component (11) comprises: A mounting seat (1101) fixed to the mounting seat (1101) on the housing (1), and a mounting rod (1102) for mounting the rear end cover (3) is fixed on the mounting seat (1101); an additional mounting seat (1103) is fixed on the housing (1), and a small hole (1104) is provided on the additional mounting seat (1103) for the mounting rod (1102) to pass through; The mounting plate (1105) is fixed to the mounting plate (1105) on the rear end cover (3); the mounting plate (1105) is provided with a through hole (1106) for the mounting rod (1102) to pass through; and the mounting rod (1102) is provided with a threaded groove (1107) which is connected to the threaded groove (1107) by a nut a (1108) to fix the rear end cover (3) and the housing (1).

5. The explosion-proof servo motor according to claim 1, characterized in that: A positioning post (12) is fixed on the filter plate (5), and a positioning hole (13) engaged with the positioning post (12) is provided on the housing (1), a cross plug plate (14) is fixed on the positioning post (12), and a slot (15) matched with the cross plug plate (14) is provided on the housing (1).

6. The explosion-proof servo motor according to claim 3, characterized in that: A rubber protective ring (16) is fixed on the wiring tube (9), and a limiting block (17) is fixed on one end of the guide rod (108), and the diameter of the limiting block (17) is larger than the diameter of the guide rod (108).

7. The explosion-proof servo motor according to claim 1, characterized in that: A base (18) is fixed on the housing (1), a reserved hole (19) is opened on the base (18), and an anti-slip pad (20) is fixed on the base (18).

8. The explosion-proof servo motor according to claim 1, characterized in that: The rear end cover (3) is provided with a circular groove (21), and a grille circular plate (22) is arranged in the circular groove (21). The central axis of the grille circular plate (22) is arranged in a colinear manner with the central axis of the filter plate (5).

9. The explosion-proof servo motor according to claim 1, characterized in that: A connecting seat (23) is fixed on the rear end cover (3), and a threaded rod (24) is fixed on the connecting seat (23); a mounting hole (25) for the threaded rod (24) to pass through is provided on the grille circular plate (22); a nut b (26) is threadedly connected to the threaded rod (24), and the grille circular plate (22) is fixed by the nut b (26).

10. The explosion-proof servo motor according to claim 1, characterized in that: The diameter of the rear end cover (3) is greater than the diameter of the outer shell (1), and the thickness of the outer shell (1) is greater than the thickness of the rear end cover (3). The cross section of the base (18) is arranged in a T shape. A rubber sealing ring a (27) is fixed on the outer shell (1), and a rubber sealing ring b (28) in contact with the rubber sealing ring a (27) is fixed on the rear end cover (3).

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