Multipurpose permanent magnet motor for semi-direct drive

Abstract

The invention relates to the technical field of permanent magnet motor structures, in particular to a multipurpose semi-direct-drive permanent magnet motor which comprises a permanent magnet unit, the permanent magnet unit comprises a motor shell, a front end cover is welded to the left side of the motor shell, side plate sets are arranged on the two sides of the motor shell, and a base is connected to the bottom end of the motor shell. A heat dissipation assembly is fixed to the inner wall of the motor shell and comprises a water-cooled frequency converter fixedly installed on the left side of the top end of the motor shell, and a water outlet is formed in the right side of the top end of the motor shell. The base plate is fixedly connected with the motor shell through bolts, so that the outer protection cylinder can be attached to the inner wall of the motor shell, the two sides of the annular pipe are in butt joint with the water-cooling frequency converter and the water outlet through butt joint pipes correspondingly, the annular pipe is arranged on the inner wall of the outer protection cylinder, the annular pipe forms an annular channel, cooling water can flow in the annular channel for circulation heat dissipation, and circulation accessories are integrally and freely disassembled and assembled; circulating accessories can be replaced conveniently, and the influence on the use performance of the permanent magnet motor caused by damage of the ring pipe or blockage of the inner hole is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of permanent magnet motor structures, and in particular to a multi-purpose semi-direct drive permanent magnet motor. Background Art

[0002] The solutions commonly used in the current fields of belt conveyors, internal mixers, grinders, etc. are: A. high-speed asynchronous motor acceleration and reduction gearbox; B. direct-drive motor. Among them, the asynchronous motor, also known as the induction motor, is an AC motor that generates electromagnetic torque by the interaction between the air gap rotating magnetic field and the rotor winding induced current, thereby realizing the conversion of electromechanical energy into mechanical energy. The direct-drive motor is the product of the development of servo technology. In addition to continuing the characteristics of the servo motor, it is widely used in various industries because of its unique characteristics such as low speed, high torque, simple structure, reduced mechanical loss, low noise, and low maintenance.

[0003] In the two schemes, air cooling and water cooling are generally used in the motor. The cooling effect of the air-cooled motor is average. The water cooling pipe of the motor is covered on the inner shell wall after casting. Since the motor shell is connected by bolts, dust and other debris can easily enter the motor through the gap of the shell. Under the adsorption of magnetic force, it is wet and sticky to the outer wall of the water cooling pipe, increasing the overall thickness and affecting the heat dissipation effect. At the same time, the particulate matter contained in the dust enters between the stator and the rotor, increasing the wear degree. The fixed design of the water cooling pipe makes it difficult to replace it after the water pipe is worn or blocked, affecting the performance of the motor. Therefore, a multi-purpose semi-direct drive permanent magnet motor is needed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A multi-purpose semi-direct drive permanent magnet motor comprises a permanent magnet unit, wherein the permanent magnet unit comprises a motor housing, a front end cover is welded on the left side of the motor housing, side plate groups are arranged on both sides of the motor housing, a base is connected to the bottom end of the motor housing, a heat dissipation component is fixed to the inner wall of the motor housing, the heat dissipation component comprises a water-cooled frequency converter fixedly mounted on the left side of the top end of the motor housing, a water outlet is installed on the right side of the top end of the motor housing, a circulation accessory is fixedly mounted on the inner wall of the motor housing, an electrical component is installed at the center position of the circulation accessory, the electrical component comprises a shaft cylinder, a rotor is connected to the surface of the shaft cylinder, a stator is sleeved and mounted on the outer side of the rotor, a spline sleeve rod is connected to the left side of the shaft cylinder, the spline sleeve rod and the shaft adopt a split structure, and are assembled together after the spline sleeve rod is frozen by liquid nitrogen, thereby reducing the processing difficulty of the shaft and shortening the axial length of the permanent magnet unit.

[0007] Preferably, a bearing cover is connected to the left side of the inner wall of the motor housing by bolts, and a lubrication accessory is provided on the inner side of the bearing cover. The lubrication accessory includes a ring cover, and a ball is embedded in the inner wall of the ring cover through a guide groove. The bearing cover and the motor housing are disassembled and assembled separately, which makes it convenient to disassemble the bearing cover and then perform maintenance operations on the internal components of the motor housing.

[0008] Preferably, an oil inlet pipe is connected to the top of the ball, and the oil inlet pipe is an L-shaped structure. The oil inlet pipe passes through the interior of the front end cover through a through hole, and a pipe cover is inserted into the end of the oil inlet pipe through a threaded hole. The rotation of the shaft cylinder can drive the ball to rotate. After the lubricating medium falls, it can be smeared on the surface of the ball and the shaft cylinder, further reducing the friction of the shaft cylinder rotation. The synchronous lubrication operation of the shaft cylinder and the ball can be performed without stopping the machine for oiling.

[0009] Preferably, the side plate group includes a side buckle plate, which is embedded in the side of the motor housing through a groove, and a through hole is opened on the surface of the side buckle plate. A screw is inserted through the through hole on the side of the motor housing, and the screw passes through the through holes of the motor housing and the side buckle plate. A nut is threadedly sleeved on the end of the screw, and the nut is rotated on the bottom end surface of the screw to disengage the nut and pull out the screw, which makes it convenient for the staff to pull out the side buckle plate and remove it from the side of the motor housing.

[0010] Preferably, a positioning block is connected at the center position of the bottom end of the side clip plate, and the positioning block is embedded in the opening of the motor housing through a groove. A placement groove adapted to the circulation accessory is provided at the top of the side clip plate. When the positioning block is embedded in the groove of the motor housing, the side clip plate can be conveniently positioned to avoid displacement of the side clip plate during installation.

[0011] Preferably, an annular groove is provided on the side of the side buckle plate, and a rubber ring is embedded in the inner wall of the annular groove. The outer side of the rubber ring is in contact with the inner wall of the motor housing. The inner side of the side buckle plate is provided with an inner concave surface that matches the circulation accessory. The annular groove of the side buckle plate is sleeved with a docking rubber ring, which can make the rubber ring contact with the inner wall of the motor housing to avoid gaps when the side buckle plate is docked with the motor housing.

[0012] Preferably, the circulation accessories include an outer casing, the top four corners of the outer casing are connected with pads, and the pads are fixed to the inner wall of the motor casing. The outer casing is fixed to the inner wall of the motor casing by bolts, which makes it convenient for staff to disassemble and assemble the outer casing.

[0013] Preferably, an annular tube is arranged around the inner wall of the pad, and the annular tube is cast in a square structure. Two butt pipes are symmetrically connected to the left and right sides of the annular tube, and the butt pipes are respectively connected to the water-cooled inverter and the water outlet through pipes. When the square structure design of the annular tube increases the circulation area of ​​the coolant, expands the heat exchange area, and improves the heat exchange effect.

[0014] Preferably, a protective component is provided on the inner wall of the front end cover, and the protective component includes a mesh disk, and two clamping blocks are symmetrically connected at the upper and lower ends of the mesh disk, and the clamping blocks are clamped on the inner wall of the front end cover through L-shaped arc grooves. A handle is connected to the surface of the mesh disk, and the clamping block is moved and embedded in the L-shaped arc groove of the front end cover. After the clamping block is embedded, it is rotated and locked to ensure the stability of the mesh disk installation.

[0015] The present invention has at least the following beneficial effects:

[0016] 1. By setting up a permanent magnet unit and a heat dissipation component, an independent disassembly and assembly design of the ring pipe is realized. Compared with the traditional structure, the pad in this device is connected and fixed to the motor housing by bolts, so that the outer casing can be close to the inner wall of the motor housing. The two sides of the ring pipe are respectively connected to the water-cooled inverter and the water outlet through the docking pipe. The ring pipe is arranged on the inner wall of the outer casing to form a loop, which allows the cooling water to flow in the loop for circulation and heat dissipation. The circulation accessories can be freely disassembled and assembled as a whole, which is convenient for replacing the circulation accessories, avoiding damage to the ring pipe or blockage of the inner hole to affect the performance of the permanent magnet motor.

[0017] 2. By setting up a permanent magnet unit and electrical components, the amount of dust entering the permanent magnet unit is reduced. This device enhances the overall strength of the machine body through one-piece casting between the motor housing and the front cover, reduces the overall docking structure, and can effectively reduce the probability of dust entering the machine body. At the same time, a freely detachable mesh disk is provided on the inner wall of the front cover to further improve the dust interception effect and reduce the probability of the ring tube heat exchange being affected.

[0018] 3. By setting lubrication accessories, the shaft barrel and the ball are lubricated at the same time. This device reduces the length of the semi-direct drive motor to the maximum extent by eliminating the structure of the traditional bearing outer cover, making it more convenient to pick up, place and move. At the same time, an oil inlet pipe is set at the top of the ring cover. The lubricating oil is pre-stored in the oil inlet pipe, so that the lubricating oil can enter the ring cover and wrap the outside of the ball. When the ball is rotated by the friction of the shaft barrel, the lubricating medium carried on the surface of the ball can be applied to the surface of the shaft barrel. The synchronous lubrication operation of the shaft barrel and the ball can be oiled without stopping the machine, reducing maintenance requirements and ensuring the performance of the permanent magnet unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the external structure of a multi-purpose semi-direct drive permanent magnet motor proposed by the present invention;

[0021] Figure 2 This is a schematic diagram of the external disassembled structure of a multi-purpose semi-direct drive permanent magnet motor proposed by the present invention;

[0022] Figure 3 This is a schematic diagram of the internal disassembled structure of a motor housing in a multi-purpose semi-direct drive permanent magnet motor proposed by the present invention;

[0023] Figure 4 This is a schematic diagram of the partial disassembly structure of the side plate group in a multi-purpose semi-direct drive permanent magnet motor proposed by the present invention;

[0024] Figure 5 This is a three-dimensional disassembled structural schematic diagram of a lubricating accessory in a multi-purpose semi-direct drive permanent magnet motor proposed by the present invention;

[0025] Figure 6 It is a schematic diagram of the partial disassembly structure of lubricating accessories and electrical components in a multi-purpose semi-direct drive permanent magnet motor proposed by the present invention;

[0026] Figure 7 This is a schematic diagram of the internal disassembled structure of a circulating accessory in a multi-purpose semi-direct drive permanent magnet motor proposed by the present invention.

[0027] In the figure: 1. permanent magnet unit; 11. motor housing; 12. front end cover; 13. side plate assembly; 131. side buckle plate; 132. rubber ring; 133. screw; 134. nut; 135. positioning block; 14. base; 15. bearing cover; 2. protection component; 21. mesh disk; 22. block; 23. handle; 3. lubrication accessories; 31. ring cover; 32. ball bearing; 33. oil inlet pipe; 34. pipe cover; 4. electrical components; 41. shaft cylinder; 42. spline sleeve rod; 43. rotor; 44. stator; 5. heat dissipation component; 51. water-cooled inverter; 52. circulation accessories; 521. outer casing; 522. pad; 523. ring pipe; 524. butt pipe; 53. water outlet. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution 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 embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] Reference Figure 1-7A multi-purpose semi-direct drive permanent magnet motor includes a permanent magnet unit 1, which includes a motor housing 11, a front end cover 12 is welded on the left side of the motor housing 11, side plate groups 13 are arranged on both sides of the motor housing 11, a base 14 is connected to the bottom end of the motor housing 11, a heat dissipation component 5 is fixed to the inner wall of the motor housing 11, the heat dissipation component 5 includes a water-cooled inverter 51 fixedly installed on the left side of the top of the motor housing 11, a water outlet 53 is installed on the right side of the top of the motor housing 11, a circulation accessory 52 is fixedly installed on the inner wall of the motor housing 11, an electrical component 4 is installed at the center position of the circulation accessory 52, the electrical component 4 includes a shaft cylinder 41, a rotor 43 is connected to the surface of the shaft cylinder 41, a stator 44 is sleeved on the outer side of the rotor 43, and a spline sleeve rod 42 is connected to the left side of the shaft cylinder 41.

[0030] The left side of the inner wall of the motor housing 11 is butted with a bearing cover 15 by bolts, and a lubricating accessory 3 is arranged inside the bearing cover 15. The lubricating accessory 3 includes a ring cover 31, and a ball 32 is embedded in the inner wall of the ring cover 31 through a guide groove.

[0031] The top of the ball 32 is connected to an oil inlet pipe 33, and the oil inlet pipe 33 is an L-shaped structure. The oil inlet pipe 33 passes through the interior of the front end cover 12 through a through hole, and a pipe cover 34 is inserted into the end of the oil inlet pipe 33 through a threaded hole.

[0032] The side plate group 13 includes a side clip plate 131, which is embedded in the side of the motor housing 11 through a groove. A through hole is opened on the surface of the side clip plate 131. A screw 133 is inserted through the through hole on the side of the motor housing 11, and the screw 133 passes through the through hole of the motor housing 11 and the side clip plate 131. A nut 134 is threadedly sleeved on the end of the screw 133.

[0033] A positioning block 135 is connected to the center of the bottom end of the side buckle plate 131 , and the positioning block 135 is embedded in the opening of the motor housing 11 through a groove. A placement groove adapted to the circulation accessory 52 is opened at the top end of the side buckle plate 131 .

[0034] An annular groove is formed on the side of the side buckle plate 131 , and a rubber ring 132 is inserted into the inner wall of the annular groove. The outer side of the rubber ring 132 is in contact with the inner wall of the motor housing 11 , and an inner concave surface adapted to the circulation accessory 52 is formed on the inner side of the side buckle plate 131 .

[0035] The circulation accessory 52 includes an outer casing 521 . The top four corners of the outer casing 521 are connected with pads 522 , and the pads 522 are fixed to the inner wall of the motor housing 11 .

[0036] An annular tube 523 is arranged around the inner wall of the pad 522. The annular tube 523 is cast in a square structure. Two butt-joint tubes 524 are symmetrically connected to the left and right sides of the annular tube 523. The butt-joint tubes 524 are respectively connected to the water-cooled inverter 51 and the water outlet 53 through pipelines.

[0037] A protective component 2 is provided on the inner wall of the front end cover 12, and the protective component 2 includes a mesh disk 21, and two clamping blocks 22 are symmetrically connected at the upper and lower ends of the mesh disk 21, and the clamping blocks 22 are clamped on the inner wall of the front end cover 12 through L-shaped arc grooves, and a handle 23 is connected to the surface of the mesh disk 21.

[0038] The ring pipe 523 is cast in a square structure, and the cooling water space is particularly large. The heat generated by the operation of the permanent magnet unit 1 can be quickly taken away through large-area water absorption. The permanent magnet unit 1 can be used as a semi-direct drive motor in conjunction with a reducer and an outlet box, and can be used as a semi-direct drive frequency conversion integrated machine in conjunction with a reducer and a frequency converter. By eliminating the structure of the traditional bearing outer cover, the length of the semi-direct drive motor is minimized, making it more convenient to pick up, place and move.

[0039] The spline sleeve 42 and the shaft adopt a split structure, which is assembled together after the spline sleeve 42 is frozen by liquid nitrogen, thereby reducing the difficulty of shaft processing and shortening the axial length of the permanent magnet unit 1. By installing the heat dissipation component 5 on the inner wall of the motor housing 11, the heat dissipation component 5 can be designed in a split manner, which is convenient for disassembly and assembly of the accessories of the heat dissipation component 5. The bearing cover 15 and the motor housing 11 adopt a split disassembly and assembly method, which can facilitate the disassembly of the bearing cover 15 and then the internal components of the motor housing 11 can be inspected and repaired. At the same time, the ball 32 is embedded in the ring cover 31 so that the ball 32 contacts the shaft cylinder 41. When the shaft cylinder 41 rotates, the ball 32 can be driven to rotate. Different from the traditional structure, the friction force when the shaft cylinder 41 rotates can be reduced, and the shaft core of the shaft cylinder 41 can be positioned at the same time.

[0040] The lubricating medium can be built into the oil inlet pipe 33 by connecting the ring cover 31. At this time, the rotation of the shaft cylinder 41 can drive the ball 32 to rotate. After the lubricating medium falls, it can be smeared on the surface of the ball 32 and the shaft cylinder 41 to further reduce the friction of the shaft cylinder 41. The synchronous lubrication operation of the shaft cylinder 41 and the ball 32 can be lubricated without stopping the machine, reducing the maintenance requirements. The nut 134 rotates on the bottom surface of the screw rod 133, and then the nut 134 is disengaged, and the screw 133 is pulled out, which can be conveniently The staff can pull out the side clip plate 131 from the side of the motor housing 11, which is beneficial for the staff to inspect the electrical components in the motor housing 11. When the side clip plates 131 are installed on both sides of the motor housing 11, the placement grooves of the side clip plates 131 can be guided and placed by the pads 522, so that the side clip plates 131 can be quickly fitted and docked on the outside of the motor housing 11. When the positioning block 135 is embedded in the groove of the motor housing 11, the side clip plates 131 can be conveniently positioned to avoid displacement of the side clip plates 131 during installation.

[0041] The concave surface design of the rubber ring 132 can facilitate the rubber ring 132 to fit on the outside of the circulation accessory 52, thereby providing protection for the circulation accessory 52. ​​At the same time, the annular groove of the side buckle plate 131 is provided with a docking rubber ring 132, which can make the rubber ring 132 contact the inner wall of the motor housing 11, avoiding the side buckle plate 131 from generating a gap when docking with the motor housing 11, so that the side buckle plate 131 can form an integrated structure with the motor housing 11. The outer casing 521 is fixed to the inner wall of the motor housing 11 by bolts, which can facilitate the staff to disassemble and assemble the outer casing 521, and facilitate the staff to disassemble and assemble the circulation accessory 52 as a whole.

[0042] The square structure design of the annular tube 523 can increase the circulation area of ​​the coolant, expand the heat exchange area, and improve the heat exchange effect. The two ends of the annular tube 523 can be connected to the pipes of the water-cooled inverter 51 and the water outlet 53 respectively through the docking tube 524, so that liquid circulation operation can be realized under the operation of the water-cooled inverter 51. By placing the net disk 21 inside the front cover 12, the block 22 can be moved and embedded in the L-shaped arc groove of the front cover 12. After the block 22 is embedded, it is rotated and locked to ensure the stability of the installation of the net disk 21. At the same time, the design of the handle 23 can facilitate the staff to hold the handle 23 to plug and unplug the net disk 21, thereby ensuring the convenience of disassembly and assembly of the net disk 21.

[0043] An inverter mounting plate can be provided directly on the motor housing 11, and the water-cooled inverter 51 can be replaced according to the installation requirements. When the end user needs a semi-direct-drive reduction-type inverter all-in-one machine, the requirement can be met by directly assembling the water-cooling plate and the inverter. When the end user only needs a semi-direct-drive reduction-type motor, the requirement can be met by directly assembling the outlet box. The machine base has strong versatility.

[0044] Working principle: According to the attached Figure 1 With attached Figure 2 As shown, during use, a water-cooled inverter 51 can be arranged on the left side of the top of the motor housing 11, and a water outlet 53 is provided on the right side of the top of the motor housing 11. The bottom end of the interface between the water-cooled inverter 51 and the water outlet 53 is fixedly docked with the docking pipe 524, which can facilitate the water circulation heat exchange operation of the coolant in the annular pipe 523. At the same time, the pad 522 can be fixed to the inner wall of the motor housing 11. When inspecting the inside of the motor housing 11, the nut 134 can be rotated to separate from the surface of the screw 133. At this time, the screw 133 can be pulled out of the side buckle plate 131 and the side of the motor housing 11. At this time, the side buckle plate 131 can be taken out to inspect the inside of the motor housing 11;

[0045] Secondly, according to the attached Figure 2As shown, when dust accumulates on the surface of the mesh disk 21 and needs to be stacked, the handle 23 can be pinched and twisted, and the handle 23 can drive the mesh disk 21 to rotate, so that the mesh disk 21 drives the handle 23 to disengage from the slot of the front cover 12. At this time, the handle 23 can be pulled outward, and then the mesh disk 21 can be controlled to be disengaged from the front cover 12 for replacement. During the use of the permanent magnet unit 1, the pipe cover 34 can be removed to allow the lubricating medium to be injected from the oil inlet pipe 33, and the lubricating medium rotates through the ball 32 and the shaft cylinder 41, so as to facilitate simultaneous lubrication.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A multi-purpose semi-direct drive permanent magnet motor, comprising a permanent magnet unit (1), characterized in that: The permanent magnet unit (1) comprises a motor housing (11), a front end cover (12) is welded on the left side of the motor housing (11), side plate groups (13) are arranged on both sides of the motor housing (11), the bottom end of the motor housing (11) is connected to a base (14), a heat dissipation component (5) is fixed to the inner wall of the motor housing (11), the heat dissipation component (5) comprises a water-cooled frequency converter (51) fixedly mounted on the left side of the top end of the motor housing (11), a water outlet (53) is installed on the right side of the top end of the motor housing (11), a circulation accessory (52) is fixedly mounted on the inner wall of the motor housing (11), an electrical component (4) is installed at the center position inside the circulation accessory (52), the electrical component (4) comprises a shaft cylinder (41), a rotor (43) is connected to the surface of the shaft cylinder (41), a stator (44) is sleeved and mounted on the outer side of the rotor (43), and a spline sleeve rod (42) is connected to the left side of the shaft cylinder (41).

2. A multi-purpose semi-direct drive permanent magnet motor according to claim 1, characterized in that: A bearing cover (15) is butt-jointed to the left side of the inner wall of the motor housing (11) via bolts, and a lubricating accessory (3) is arranged on the inner side of the bearing cover (15). The lubricating accessory (3) comprises a ring cover (31), and a ball bearing (32) is embedded in the inner wall of the ring cover (31) via a guide groove.

3. A multi-purpose semi-direct drive permanent magnet motor according to claim 2, characterized in that: The top end of the ball (32) is connected to an oil inlet pipe (33), and the oil inlet pipe (33) is in an L-shaped structure. The oil inlet pipe (33) passes through the interior of the front end cover (12) through a through hole, and a pipe cover (34) is inserted into the end of the oil inlet pipe (33) through a threaded hole.

4. A multi-purpose semi-direct drive permanent magnet motor according to claim 1, characterized in that: The side plate group (13) comprises a side buckle plate (131), the side buckle plate (131) is embedded in the side of the motor housing (11) through a groove, a through hole is opened on the surface of the side buckle plate (131), a screw rod (133) is inserted through the through hole on the side of the motor housing (11), and the screw rod (133) passes through the through hole of the motor housing (11) and the side buckle plate (131), and a nut (134) is threadedly sleeved on the end of the screw rod (133).

5. A multi-purpose semi-direct drive permanent magnet motor according to claim 4, characterized in that: A positioning block (135) is connected to the center of the bottom end of the side buckle plate (131), and the positioning block (135) is embedded in the opening of the motor housing (11) through a groove. A placement groove adapted to the circulation accessory (52) is provided at the top end of the side buckle plate (131).

6. A multi-purpose semi-direct drive permanent magnet motor according to claim 5, characterized in that: The side buckle plate (131) is provided with an annular groove on its side, and a rubber ring (132) is inserted into the inner wall of the annular groove. The outer side of the rubber ring (132) is in contact with the inner wall of the motor housing (11), and the inner side of the side buckle plate (131) is provided with an inner concave surface adapted to the circulation accessory (52).

7. A multi-purpose semi-direct drive permanent magnet motor according to claim 1, characterized in that: The circulation accessory (52) comprises an outer casing (521), and pads (522) are connected to the four corners of the top end of the outer casing (521), and the pads (522) are fixed to the inner wall of the motor housing (11).

8. A multi-purpose semi-direct drive permanent magnet motor according to claim 7, characterized in that: An annular tube (523) is arranged around the inner wall of the pad (522), and the annular tube (523) is cast in a square structure. Two butt-joint tubes (524) are symmetrically connected to the left and right sides of the annular tube (523), and the butt-joint tubes (524) are respectively connected to the water-cooled frequency converter (51) and the water outlet (53) through pipelines.

9. A multi-purpose semi-direct drive permanent magnet motor according to claim 1, characterized in that: The inner wall of the front end cover (12) is provided with a protection component (2), the protection component (2) comprises a mesh disk (21), two clamping blocks (22) are symmetrically connected to the upper and lower ends of the mesh disk (21), and the clamping blocks (22) are clamped on the inner wall of the front end cover (12) through L-shaped arc grooves, and a handle (23) is connected to the surface of the mesh disk (21).

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