An explosion-proof servo motor

Abstract

The invention discloses an explosion-proof servo motor, which relates to the technical field of explosion-proof servo motors. The motor comprises a shell and a servo driver arranged in the shell, wherein a rear end cover is provided on the shell; the motor further comprises fan blades fixed on the servo driver shaft, for the purpose of dissipating heat to the servo driver and the shell through the fan blades; a filter plate is provided on the shell, and a cleaning unit matched with the filter plate is provided in the shell, for cleaning dust on the filter plate through the cleaning unit; a junction box is provided on the servo driver, and a groove for supporting the junction box is provided on the shell, a junction tube is fixed on the junction box, and a pressing member is provided on the junction tube; the invention drives the shaft body and the scraper to rotate stably through the meshing transmission mechanism of the toothed ring and the spur gear, continuously cleans the filter plate, avoids dust accumulation and blockage, prevents influence on the heat dissipation of the servo driver, ensures good heat dissipation effect of the servo driver, and enhances reliability.

Description

Technical Field

[0001] The present 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 designed specifically for use in hazardous environments. It can operate safely in explosive gas environments. This motor is specially designed and treated to prevent explosions caused by internal or external sparks, 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 symbols to indicate their explosion-proof grade and applicable explosive environment.

[0003] Explosion-proof servo motors have a wide range of applications, mainly in chemical plants, oil refineries, coal mines, and other places where flammable and explosive substances such as combustible gas, steam, or dust exist. Due to their ability to operate stably in hazardous environments, explosion-proof servo motors play an important role in these fields, ensuring the safety and smooth progress of production.

[0004] Chinese Patent Publication No. (CN113364191B) "discloses an explosion-proof servo motor, comprising a housing, a front end cover being provided at the front end of the housing, a rear end cover being provided at the rear end of the housing, a rotating shaft, a rotor winding and a stator being provided in the housing, and both ends of the rotating shaft being rotatably passed through the front end cover and the rear end cover respectively, a cover being installed on the rear end cover, and an explosion-proof mechanism being installed on the housing, the explosion-proof mechanism comprising a first explosion-proof component and a second explosion-proof component, the first explosion-proof component being fixedly installed on the housing, the second explosion-proof component being installed on the first explosion-proof component, and a sealing member being installed between the first explosion-proof component and the second explosion-proof component, to solve the problem that when an explosion occurs inside the servo motor, the flame of the explosion may not be extinguished in time and ignite external flammable gas, or flammable gas or dust outside the motor may explode, thereby possibly causing the flammable gas or dust inside the motor to explode." Although the above patent document can solve the problem of explosion of flammable 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 prevent the explosion from spreading outward by using a casing that can withstand the internal explosion pressure. However, due to factors such as dust in the long-term operation 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 performance of the explosion-proof servo motor. For this reason, we propose an explosion-proof servo motor. Summary of the Invention

[0006] The object 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. The fan blades are used to dissipate heat from the servo drive and the housing. A filter plate is provided on the housing, and a cleaning unit that cooperates with the filter plate is provided in the housing. The cleaning unit is used to clean the dust on the filter plate.

[0010] A junction box is provided 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 pressing piece is provided on the wiring tube for pressing the power line;

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

[0012] Preferably, the cleaning unit comprises:

[0013] A connecting frame fixed to the servo drive shaft, with a gear ring fixed on the connecting frame, a support plate fixed in the housing, a shaft body rotatably connected to the support plate, and a spur gear meshing with the gear ring 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 includes:

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

[0017] A connecting block is fixed on the wiring tube, and a guide rod for the pressure ring to slide through is fixed on the connecting block, 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 base is fixed to the housing, and a mounting rod for mounting the rear end cover is fixed to the mounting base. An additional mounting base is fixed to the housing, and a small hole is opened on the additional mounting base for the mounting rod to pass through;

[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 the 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 adapted to the cross plug plate is provided on the shell.

[0022] Preferably, a rubber protective ring is fixed on the wiring tube, and 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 provided on the rear end cover, and a grid circular plate is provided in the circular groove, and the central axis of the grid circular plate is collinear 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 cross section of the base 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 clean the filter screen continuously and evenly, effectively avoiding the dust accumulation and clogging problems caused by long-term use of the filter screen, and effectively preventing the influence of dust accumulation on the heat dissipation of the servo driver, thereby not only ensuring that the servo driver 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 driver, 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. This 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 the 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 step by step, and continues 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 disassembled to facilitate subsequent maintenance and renovation work. After the grille circular plate is disassembled, 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 This is a schematic diagram of the back structure of the present invention;

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

[0034] Figure 4 This is a structural 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 of the present invention;

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

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

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

[0041] Figure 11This is a structural diagram of the cleaning unit in the present invention;

[0042] Figure 12 This is a schematic diagram of the explosion structure of the installation component in the present invention;

[0043] Figure 13 This is a schematic diagram of the explosion structure at the filter plate in the present invention;

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

[0045] Figure 15 It is a schematic diagram of the side sectional structure of the shell in the present invention.

[0046] In the figure: 1. Housing; 2. Servo drive; 3. Rear cover; 4. Fan blade; 5. Filter plate; 6. Cleaning unit; 601. Connecting frame; 602. Gear ring; 603. Support plate; 604. Shaft; 605. Spur gear; 606. Scraper; 7. Junction box; 8. Groove; 9. Wiring tube; 10. Pressing piece; 101. Mounting slot; 102. Bracket; 103. Screw hole; 104. Screw; 105. Knob; 106. Pressing ring; 107. Connecting block; 108. Guide rod; 109. Rubber block; 11. Mounting assembly; 1101. Mounting 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 clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0048] Example 1

[0049] See also Figures 1-15The 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 provided on the shell 1. The shell 1 is made of stainless steel. Stainless steel has extremely strong corrosion resistance, especially in humid, acidic or alkaline environments. It can resist oxidation, corrosion and rust. It also includes fan blades 4, which are 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 provided on the shell 1. The filter plate 5 is made of metal and has a circular shape, which is more in line with the shape of the overall device. A cleaning unit 6 that cooperates with the filter plate 5 is provided in the shell 1. The cleaning unit 6 is used to clean dust on 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 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 housing 1. The junction box 7 extends to the outside of the housing 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 provided 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 bottom of the junction box 7 base 18 is sealed with the servo driver 2 through a sealing element, and the top is connected to the junction box 7 cover through a sealing element. The side end is connected to the waterproof component through a sealing element, thereby forming an overall structure with a simple structure and fewer connection links, effectively reducing the possibility of leakage. This is a conventional setting in the field, so it will not be described in detail here.

[0053] The mounting assembly 11 is arranged on the shell 1, and is used for disassembling and assembling the rear end cover 3 and the shell 1 through the mounting assembly 11. 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, thereby forming a supporting effect on the shell 1. Reserved holes 19 are opened on the base 18. Through the setting of the pre-designed reserved holes 19, the device can be easily fixed firmly to the predetermined use position with bolts during the actual use in the later stage. In addition, an anti-slip gasket 20 is also installed on the base 18. The anti-slip gasket 20 itself has certain elastic properties. During the installation and fixing of the base 18, the anti-slip gasket 20 can provide the necessary pre-tightening force to ensure the stability and safety of the device. At the same time, the anti-slip gasket 20 also has excellent anti-slip performance, which can effectively prevent the device from slipping or displacing 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 together 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 this solution, when the servo driver 2 is used to work, the power cord is electrically connected to the junction box 7 and passed through the wiring tube 9. 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 as Figure 3 、 Figure 10 、 Figure 11 、 Figure 13 and Figure 15 As shown, it is worth mentioning 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 and the shaft are fixed by a connecting ring to ensure that the connecting frame 601 can run synchronously with the shaft of the servo drive 2, and a gear ring 602 is fixed on the connecting frame 601, and the central axis of the gear ring 602 is collinear 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. 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 gear 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. Three shaft scrapers 606 are fixed to one end of each shaft. The angle between each scraper 606 is 120 degrees, and each scraper 606 is in a non-contact state, thereby preventing the scraper 606 from contacting and causing a jam during operation. The scraper 606 contacts the filter plate 5. The filter plate 5 is fixed with a positioning column 12. The positioning column 12 is set in a cylindrical shape, and the number of the positioning column 12 is set. There are four positioning posts 12, and the four positioning posts 12 are symmetrically arranged at the four corners. The outer shell 1 is provided with positioning holes 13 that engage with the positioning posts 12. A cross plug plate 14 is fixed on the positioning post 12. The cross plug plate 14 is made of 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 that is compatible with the cross plug plate 14. The dust and impurities on the filter plate 5 are 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 gear ring 602 to rotate, and the meshing transmission mechanism of the gear 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 plate 5. In this way, the dust accumulation and blockage problems caused by long-term use of the filter plate 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 drives the fan blades 4 to operate synchronously, and the heat in the housing 1 is discharged by forced convection, thereby maintaining the normal operating 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 gear ring 602 to rotate synchronously. The meshing transmission between the gear ring 602 and the spur gear 605 causes the shaft to rotate 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 limit 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 plate 14 is separated from the slot 15 , thereby completing the disassembly of the filter plate 5 .

[0064] Example 2:

[0065] On the basis of Example 1, according to Figure 3 、 Figure 6 、 Figure 7 and Figure 9 As shown, it is worth mentioning that the clamping member 10 includes a mounting groove 101, which is provided on the wiring tube 9. The mounting groove 101 is provided 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 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, which is semicircular in shape, so that it has stronger stability when the power cord is compressed and positioned.

[0066] The 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. There are two connecting blocks 107 and two guide rods 108, and a rubber block 109 is fixed to the 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 the power line, thereby being able to more firmly complete the clamping and positioning of the power line.

[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, it is only necessary to turn the knob 105 to achieve a stable and rapid completion of the clamping and positioning of the power cord, which not only improves the efficiency of wiring work, 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 is completed by passing the power line through the wiring tube 9 and connecting the terminal to the terminal in the junction box 7;

[0070] Secondly, the power cord needs to be pressed and positioned. By turning the knob 105, the screw 104 rotates synchronously. The threaded transmission between the screw 104 and the screw hole 103 generates a pressure-pushing 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 comes into contact with 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 power line pressing and positioning work.

[0072] Example 3:

[0073] This embodiment further illustrates other embodiments. Figure 1 、 Figure 2 、 Figure 5 、 Figure 7 、 Figure 12 and Figure 15 As shown, it is worth mentioning 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 on the four diagonal points of the outer shell 1, and the angles between each mounting seat 1101 are right angles, the mounting seat 1101 is fixed on the outer shell 1, and a mounting rod 1102 for installing the rear end cover 3 is fixed on the mounting seat 1101, and an additional mounting seat 1103 is fixed on the outer shell 1, and a small hole 1104 is provided on the additional mounting seat 1103 for allowing 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. A through hole 1106 is provided on the mounting plate 1105 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 a threaded groove 1107 is provided on the mounting rod 1102, which is fixed to the rear end cover 3 and the outer shell 1 through a nut a1108 connected to the threaded groove 1107.

[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 thread 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, this 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 restriction on the grille circular plate 22 and removing the grille circular plate 22. This facilitates maintenance and repair of the grille circular plate 22 after disassembly, and also facilitates maintenance inside the rear end cover 3.

[0078] The servo driver 2 can be purchased from the market and equipped with a separate power supply. It 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 document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0080] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the 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) disposed within the housing (1); a rear end cover (3) is disposed on the housing (1); It is characterized by further comprising: The fan blade (4) is fixed on the shaft of the servo driver (2), and is used to dissipate heat from the servo driver (2) and the housing (1) through the fan blade (4). The housing (1) is provided with a filter plate (5), and the housing (1) is provided with a cleaning unit (6) that matches the filter plate (5). The cleaning unit (6) is used to clean dust from the filter plate (5), and the cleaning unit (6) includes: 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 support plate (603) is fixed in the housing (1), a shaft (604) is rotatably connected to the support plate (603), and a spur gear (605) meshing with the toothed ring (602) is fixed at one end of the shaft (604); A scraper (606) is fixed to one end of the shaft (604), and the scraper (606) is in contact with the filter plate (5). The scraper (606) rotates to clean dust and impurities on the filter plate (5); A junction box (7) is provided on the servo driver (2), and a groove (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 member (10) is provided on the junction tube (9), and the pressing member (10) is used to press the power line; A mounting assembly (11) is provided on the housing (1) and is used for assembling and disassembling the rear end cover (3) and the housing (1).

2. The explosion-proof servo motor according to claim 1, characterized in that: The pressing member (10) comprises: A mounting groove (101) is provided 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).

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

4. 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 insert (14) is fixed on the positioning post (12), and a slot (15) adapted to the cross insert (14) is provided on the housing (1).

5. The explosion-proof servo motor according to claim 2, 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).

6. 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 gasket (20) is fixed on the base (18).

7. 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 grid circular plate (22) is provided in the circular groove (21). The central axis of the grid circular plate (22) is collinear with the central axis of the filter plate (5).

8. 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).

9. 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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