Heat dissipation motor end cover

Abstract

The utility model relates to the technical field of motors, and a heat dissipation motor end cover comprises an end cover body, the periphery of one end of the end cover body along the axis direction of the end cover body is connected with a mounting ring, the mounting ring is provided with a plurality of mounting holes, the plurality of mounting holes are circumferentially distributed around the axis of the end cover body at intervals, and the mounting holes are used for being in threaded connection with a motor shell after bolts pass through. A containing cavity is coaxially formed in the end, close to the mounting ring, of the end cover body, a communicating hole is coaxially formed in the cavity wall of the containing cavity and used for allowing a motor output shaft to penetrate through, and a plurality of cooling fins are connected to the outer wall of the end cover body and distributed at intervals in the circumferential direction of the end cover body. The cooling fins extend to the side wall of the end cover body from the surface of the side, away from the mounting ring, of the end cover body. The end cover body is provided with a plurality of heat dissipation fins, the contact area between the end cover body and external air is increased, the heat dissipation efficiency of the end cover body is improved, the heat dissipation efficiency of the motor is further improved, and the service life of the motor is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of electric motors, and in particular to a heat dissipation motor end cover. Background Technology

[0002] Motor end covers are housings located at both ends of a motor, primarily serving to protect the motor's internal core components. They are typically made of materials such as cast iron or aluminum alloy. They protect internal components from external influences, such as dust and foreign objects; provide a good seal to prevent liquid or gas exchange between the inside and outside of the motor, thus preventing internal corrosion; and also provide heat dissipation, keeping the motor's internal temperature within a safe range. During motor operation, resistive losses occur as current flows through the windings, and iron losses occur due to changes in magnetic flux within the iron core. These losses are ultimately converted into heat energy. If the end covers cannot quickly dissipate this heat, the motor temperature will rise, leading to reduced motor efficiency and increased noise. Utility Model Content

[0003] In order to improve the heat dissipation efficiency of the motor end cover and extend the service life of the motor, this application provides a heat dissipation motor end cover.

[0004] The heat dissipation motor end cover provided in this application adopts the following technical solution:

[0005] A heat dissipation motor end cover includes an end cover body. A mounting ring is connected to the outer periphery of one end of the end cover body along the axial direction of the end cover body. The mounting ring has a plurality of mounting holes, which are circumferentially spaced around the axis of the end cover body. The mounting holes are used for bolts to pass through and be threaded to the motor housing. A receiving cavity is coaxially provided at one end of the end cover body near the mounting ring. A communicating hole is coaxially provided in the cavity wall of the receiving cavity for the motor output shaft to pass through. A plurality of heat dissipation fins are connected to the outer wall of the end cover body. The heat dissipation fins are circumferentially spaced around the end cover body and extend from the surface of the end cover body away from the mounting ring to the side wall of the end cover body.

[0006] By adopting the above technical solution, the end cover body is provided with several heat dissipation fins, which increases the contact area between the end cover body and the outside air, improves the heat dissipation efficiency of the motor end cover, and thus improves the heat dissipation efficiency of the motor and extends the service life of the motor.

[0007] Preferably, the sidewall of the end cap body is tapered away from the mounting ring along the axis of the end cap body.

[0008] By adopting the above technical solution, the side wall of the end cover body is gradually tapered along the axis of the end cover body, which increases the contact area between the side wall of the end cover body and the outside air and improves the heat dissipation efficiency of the motor end cover.

[0009] Preferably, the end cap body has a communicating cavity, which is located on the side of the receiving cavity near the communicating hole. The cavity wall of the communicating cavity near the receiving cavity has a first connecting hole, which is connected to the receiving cavity. The cavity wall of the communicating cavity has a vent hole, which is connected to the outside.

[0010] By adopting the above technical solution, the end cover body is provided with a vent hole, a connecting cavity and a first connecting hole that are connected to the receiving cavity, which facilitates the exchange of high-temperature air inside the motor with low-temperature air outside, thereby improving the heat dissipation efficiency of the motor end cover.

[0011] Preferably, the device further includes a sealing plate, a thermal expansion block, and a first resetting member. The sealing plate is slidably embedded in the communicating cavity, and the sliding direction of the sealing plate is parallel to the axis of the end cap body. The sealing plate is provided with a second connecting hole, which is offset from the first connecting hole. The first resetting member is connected between the sealing plate and the end cap body. The first resetting member causes the sealing plate to tend to abut against the cavity wall of the communicating cavity near the receiving cavity. The thermal expansion block is embedded in the communicating cavity and is used to push the sealing plate to slide away from the receiving cavity.

[0012] By adopting the above technical solution, when the motor is not in use, the sealing plate abuts against the side wall of the connecting cavity near the receiving cavity under the action of the elastic force of the first reset member, thereby sealing the first connection hole, preventing external impurities from entering the motor, reducing the possibility of motor damage, and improving the service life of the motor. When the temperature inside the motor rises, the thermal expansion block expands due to heat, pushing the sealing plate to slide away from the receiving cavity, so that the air inside the receiving cavity can be connected to the outside air through the first connection hole, the second connection hole, and the vent hole, thereby realizing the exchange of hot air inside the motor with the outside air.

[0013] Preferably, the sealing plate is connected to a second protrusion on the side near the receiving cavity, the number of the second protrusions is the same as the number of the first connecting holes and they correspond one-to-one. The second protrusion is used to be embedded in the first connecting hole. The communicating cavity is connected to a first protrusion on the cavity wall near the receiving cavity, the number of the first protrusions is the same as the number of the second connecting holes and they correspond one-to-one. The first protrusion is used to be embedded in the second connecting hole.

[0014] By adopting the above technical solution, the first protrusion is used to be embedded in the second connecting hole, and the second protrusion is used to be embedded in the first connecting hole, so as to clean the first connecting hole and the second connecting hole, reduce the possibility of blockage of the first connecting hole and the second connecting hole, and improve the reliability of the motor end cover.

[0015] Preferably, the outer periphery of the first protrusion away from the receiving cavity is provided with a first chamfer, which is used to abut against the wall of the second connecting hole, and the outer periphery of the second protrusion away from the sealing plate is provided with a second chamfer, which is used to abut against the wall of the first connecting hole.

[0016] By adopting the above technical solution, the first chamfer is used to abut against the wall of the second connecting hole, and the second abutment is used to abut against the wall of the first connecting hole, which plays a guiding role for the first protrusion and the second protrusion, so that the first protrusion can be inserted into the second connecting hole and the second protrusion can be inserted into the first connecting hole.

[0017] Preferably, it also includes a fan, which is rotatably embedded in the receiving cavity, and the rotation axis of the fan coincides with the axis of the motor output shaft.

[0018] By adopting the above technical solution and setting a fan, the air in the receiving cavity is blown to the connecting cavity, which accelerates the air flow rate in the motor and improves the heat dissipation efficiency of the motor end cover.

[0019] Preferably, it further includes a connecting frame and a rotating seat. One end of the connecting frame is connected to the closed plate, and the rotating seat is rotatably connected to the end of the connecting frame away from the closed plate. The rotation axis of the rotating seat coincides with the axis of the motor output shaft. The rotating seat has a transmission groove on its inner side for inserting the motor output shaft. The rotating seat is circumferentially fixed to the motor output shaft. The rotating seat is located on the side of the fan away from the communicating cavity and is used to abut against the surface of the fan on the side away from the communicating cavity.

[0020] By adopting the above technical solution, the heated expansion block expands, pushing the sealing plate to slide, which in turn drives the connecting frame to slide, and then the rotating seat to slide. The rotating seat abuts against the fan, and the motor output shaft drives the rotating seat to rotate. The rotating seat drives the fan to rotate through friction, which in turn drives the fan blades to rotate, improving the heat dissipation efficiency of the motor end cover. Before the rotating seat abuts against the fan, the fan does not rotate, which helps to reduce the energy consumption of the diesel engine.

[0021] Preferably, it further includes a first friction block and a second friction block, the first friction block being connected to the side surface of the rotating seat near the connecting frame, and the second friction block being connected to the side surface of the fan away from the communicating cavity, the second friction block being used to abut against the first friction block.

[0022] By adopting the above technical solution, the first friction block and the second friction block abut against each other, increasing the friction between the rotating seat and the fan, ensuring close contact between the rotating seat and the fan, improving the stability and reliability of the fan rotation, reducing wear between the rotating seat and the fan, and increasing the service life of the motor end cover.

[0023] Preferably, the device further includes a rotating block, a counterweight, a contact block, and a second reset member. The rotating block is rotatably connected to the fan, and the rotation axis of the rotating block is parallel to the rotation of the fan. The counterweight is connected to one end of the rotating block, and the contact block is connected to the other end of the rotating block. The contact block is used to press against the outer wall of the rotating seat. The counterweight and the contact block are located on opposite sides of the rotation axis of the rotating block. The mass of the counterweight is greater than the mass of the contact block. When the fan is rotating, the counterweight tends to move away from the rotating seat. The second reset member is connected between the rotating block and the fan, and the second reset member causes the contact block to tend to move away from the rotating seat.

[0024] By adopting the above technical solution, when the rotating seat abuts against the fan, the rotating seat drives the fan to rotate. The mass of the counterweight is greater than the mass of the abutting block, so that the centrifugal force on the counterweight is greater than the centrifugal force on the abutting block. This causes the counterweight to move away from the rotating seat, driving the rotating block to rotate. This causes the other end of the rotating block to move closer to the rotating seat, so that the abutting block abuts against the outer wall of the rotating seat. When the temperature inside the motor drops, the thermal expansion block contracts, and the fan remains connected to the rotating seat through the abutting block.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The end cover body is provided with several heat dissipation fins, which increases the contact area between the end cover body and the outside air, improves the heat dissipation efficiency of the motor end cover, and thus improves the heat dissipation efficiency of the motor and extends the service life of the motor.

[0027] 2. When the motor is not in use, the sealing plate abuts against the side wall of the connecting cavity near the receiving cavity under the elastic force of the first reset member, thereby sealing the first connection hole, preventing external impurities from entering the motor, reducing the possibility of motor damage, and improving the service life of the motor. When the temperature inside the motor rises, the thermal expansion block expands due to heat, pushing the sealing plate to slide away from the receiving cavity, so that the air inside the receiving cavity can be connected to the outside air through the first connection hole, the second connection hole, and the vent hole, thereby realizing the exchange of hot air inside the motor with the outside air.

[0028] 3. The heated expansion block expands, pushing the sealing plate to slide, which in turn drives the connecting frame to slide, and then the rotating seat to slide. The rotating seat comes into contact with the fan, and the motor output shaft drives the rotating seat to rotate. The rotating seat drives the fan to rotate through friction, which in turn drives the fan blades to rotate, improving the heat dissipation efficiency of the motor end cover. Before the rotating seat comes into contact with the fan, the fan does not rotate, which helps to reduce the energy consumption of the diesel engine. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the heat dissipation motor end cover.

[0030] Figure 2This is a cross-sectional view of the end cover of the cooling motor.

[0031] Figure 3 yes Figure 2 Enlarged view at point A.

[0032] Figure 4 yes Figure 2 Enlarged view at point B.

[0033] Figure 5 This is a partial cross-sectional view of the sliding component and the heat dissipation component.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. End cap body; 11. Receiving cavity; 12. Mounting ring; 121. Mounting hole; 13. Communicating hole; 14. Heat dissipation fins; 15. Communicating cavity; 16. First connecting hole; 17. Vent hole; 18. First protrusion; 181. First chamfer; 19. Reinforcing rib; 110. Groove; 111. Receiving groove; 112. Sliding groove; 113. Second limiting groove;

[0036] 2. Sliding assembly; 21. Enclosed plate; 211. Second connecting hole; 212. Second protruding post; 2121. Second chamfer; 213. Insert; 22. Thermal expansion block; 23. First reset component; 24. Connecting frame; 241. Connecting post; 242. Connecting ring; 2421. First limiting groove; 25. Rotating seat; 251. Transmission groove; 252. First limiting block; 253. Ring groove; 26. First friction block;

[0037] 3. Heat dissipation assembly; 31. Fan; 311. Connecting cylinder; 3111. Mounting slot; 312. Fan blade; 313. Second limiting block; 314. Protruding ring; 3141. Rotating groove; 3142. Groove; 32. Second friction block; 33. Rotating block; 331. Rotating shaft; 332. Connecting plate; 333. Abutting plate; 34. Counterweight block; 35. Abutting block; 36. Second reset component. Detailed Implementation

[0038] The present application will be further described in detail below with reference to the accompanying drawings.

[0039] Reference Figure 1This application discloses a heat dissipation motor end cover, including an end cover body 1. A mounting ring 12 is coaxially fixedly connected to the outer circumference of one end of the end cover body 1 along its axial direction. The mounting ring 12 has a plurality of mounting holes 121 for bolts to pass through and threadedly connect to the motor housing. The mounting holes 121 are spaced apart circumferentially around the axis of the end cover body 1. In this embodiment, ten mounting holes 121 are provided, evenly distributed circumferentially around the axis of the end cover body 1. The sidewall of the end cover body 1 tapers away from the mounting ring 12 along its axial direction. A plurality of heat dissipation fins 14 are fixedly connected to the outer wall of the end cover body 1, spaced apart circumferentially around the axis of the end cover body 1. The heat dissipation fins 14 are divided into four groups, evenly distributed circumferentially around the axis of the end cover body 1. Each group has twelve heat dissipation fins, and the twelve heat dissipation fins in the same group are evenly distributed circumferentially around the axis of the end cover body 1. The heat dissipation fins 14 extend from the surface of the end cover body 1 away from the mounting ring 12 to the side wall of the end cover body 1, and the surface of the heat dissipation fins 14 away from the end cover body 1 is parallel to the outer wall of the end cover body 1. Four reinforcing ribs 19 are fixedly connected to the outer wall of the end cover body 1. These four reinforcing ribs 19 are evenly distributed circumferentially around the axis of the end cover body 1. A reinforcing rib 19 is provided between two adjacent sets of heat dissipation fins 14. The reinforcing ribs 19 extend from the mounting ring 12 to the surface of the end cover body 1 away from the mounting ring 12.

[0040] Reference Figure 1 and Figure 2 The end cap body 1 has a coaxial receiving cavity 11 near the mounting ring 12. A connecting hole 13 is coaxially provided at the bottom of the receiving cavity 11, connecting to the outside and allowing the motor output shaft to pass through. The end cap body 1 also has a connecting cavity 15, located on the side of the receiving cavity 11 near the connecting hole 13. The connecting cavity 15 is annular, and its axis coincides with the axis of the end cap body 1. A vent hole 17 is provided on the outer wall of the connecting cavity 15, connecting to the outside. Several vent holes 17 are provided, divided into four groups. Each group of vent holes 17 corresponds to one of four groups of heat dissipation fins 14. Each group has eleven vent holes 17, and a vent hole 17 is provided between two adjacent heat dissipation fins 14.

[0041] A heat dissipation motor end cover also includes a sliding assembly 2, which includes a sealing plate 21, a thermal expansion block 22, and a first reset member 23. The sealing plate 21 is slidably embedded in the connecting cavity 15, and the sliding direction of the sealing plate 21 is parallel to the axial direction of the end cover body 1. The sidewall of the sealing plate 21 is in contact with the cavity wall of the connecting cavity 15. The first reset member 23 is connected between the sealing plate 21 and the end cover body 1, and the first reset member 23 makes the sealing plate 21 tend to abut against the cavity wall of the connecting cavity 15 near the receiving cavity 11. In this embodiment, the first reset member 23 is a spring. One end of the first reset member 23 is connected to the surface of the sealing plate 21 away from the receiving cavity 11, and the other end of the first reset member 23 is connected to the cavity wall of the connecting cavity 15 away from the receiving cavity 11. There are six first reset members 23, which are evenly distributed circumferentially around the axis of the end cover body 1. Several grooves 110 are provided on the outer cavity wall of the connecting cavity 15, and the grooves 110 are spaced apart circumferentially around the axis of the end cover body 1. In this embodiment, four slots 110 are provided, and the four slots 110 are evenly distributed circumferentially around the axis of the end cover body 1. An insert 213 is fixedly connected to the outer wall of the sealing plate 21. The number of inserts 213 is the same as the number of slots 110 and corresponds one-to-one. The inserts 213 are slidably embedded in the slots 110, and the sidewalls of the inserts 213 are in contact with the groove wall of the slot 110. A receiving groove 111 is provided on the side of the slot 110 near the receiving cavity 11. The receiving groove 111 is annular and communicates with the four slots 110. A heated expansion block 22 is embedded in the receiving groove 111. The heated expansion block 22 is annular, with one end of the heated expansion block 22 near the receiving cavity 11 fixedly connected to the groove wall of the receiving groove 111 near the receiving cavity 11. The other end of the heated expansion block 22 abuts against the surface of the insert 213 near the receiving cavity 11. The heated expansion block 22 pushes the sealing plate 21 to slide away from the receiving cavity 11.

[0042] Reference Figure 3The connecting cavity 15 has several first connecting holes 16 on one side of its cavity wall near the receiving cavity 11. These first connecting holes 16 communicate with the receiving cavity 11, and their axes are parallel to the axis of the end cap body 1. The first connecting holes 16 are evenly distributed. The sealing plate 21 has several second connecting holes 211 that penetrate the sealing plate 21 along its sliding direction. The second connecting holes 211 are offset from the first connecting holes 16. Several second protrusions 212 are fixedly connected to the surface of the sealing plate 21 near the receiving cavity 11. The number of second protrusions 212 is the same as the number of first connecting holes 16 and they correspond one-to-one. The second protrusions 212 are used to embed into the first connecting holes 16. The outer wall of the second protrusion 212 fits against the wall of the first connecting hole 13. A second chamfer 2121 is provided on the outer periphery of the second protrusion 212 near the receiving cavity 11. The second chamfer 2121 abuts against the wall of the first connecting hole 16. A number of first protrusions 18 are fixedly connected to the cavity wall of the connecting cavity 15 near the receiving cavity 11. The number of first protrusions 18 is the same as the number of second connecting holes 211 and they correspond one-to-one. The first protrusions 18 are used to be embedded in the second connecting holes 211. The outer wall of the first protrusion 18 fits against the hole wall of the second connecting hole 13. The outer periphery of the first protrusion 18 away from the receiving cavity 11 is provided with a first chamfer 181. The first chamfer 181 is used to abut against the hole wall of the second connecting hole 211.

[0043] Reference Figure 2 and Figure 4The sliding assembly 2 also includes a connecting frame 24 and a rotating seat 25. The connecting frame 24 includes a connecting post 241 and a connecting ring 242. The length direction of the connecting post 241 is parallel to the axial direction of the end cap body 1. One end of the connecting post 241 is fixedly connected to the side surface of the sealing plate 21 near the receiving cavity 11. There are several connecting posts 241, which are circumferentially spaced around the axis of the end cap body 1. In this embodiment, there are six connecting posts 241. A groove 112 is provided on the side wall of the communicating cavity 15 near the receiving cavity 11. The number of grooves 112 is the same as the number of connecting posts 241 and they correspond one-to-one. The other end of the connecting post 241 passes through the groove 112 and extends into the receiving cavity 11. The side wall of the connecting post 241 is in contact with the groove wall of the groove 112. The connecting ring 242 is fixedly connected to the end of the connecting post 241 away from the sealing plate 21. The axis of the connecting ring 242 coincides with the axis of the end cap body 1. The rotating seat 25 is coaxially rotatably connected to the side surface of the connecting ring 242 away from the connecting post 241. The rotation axis of the rotating seat 25 coincides with the axis of the motor output shaft. A transmission groove 251 is provided on the inner side of the rotating seat 25 for the motor output shaft to be inserted. The rotating seat 25 and the motor output shaft are circumferentially fixed. A first limiting groove 2421 is provided on the side surface of the connecting ring 242 away from the connecting post 241. The first limiting groove 2421 is annular, and its axis coincides with the axis of the connecting ring 242. A first limiting block 252 is fixedly connected to one end of the rotating seat 25 near the connecting ring 242. The first limiting block 252 is rotatably embedded in the first limiting groove 2421, and its rotation axis coincides with the rotation axis of the rotating seat 25.

[0044] A heat dissipation motor end cover also includes a heat dissipation assembly 3, which includes a fan 31 and a second friction block 32. The fan 31 includes a connecting cylinder 311 and a fan blade 312. The connecting cylinder 311 is rotatably embedded in the receiving cavity 11, and the rotation axis of the connecting cylinder 311 coincides with the rotation axis of the rotating seat 25. The connecting cylinder 311 is located on the side of the rotating seat 25 near the communicating cavity 15. The end of the connecting cylinder 311 away from the rotating seat 25 is in contact with the bottom of the receiving cavity 11. The bottom of the receiving cavity 11 is provided with a second limiting groove 113, which is annular, and the axis of the second limiting groove 113 coincides with the axis of the end cover body 1. The end of the connecting cylinder 311 near the communicating cavity 15 is fixedly connected to the second limiting block 313, which is rotatably embedded in the second limiting groove 113, and the rotation axis of the second limiting block 313 coincides with the rotation axis of the connecting cylinder 311. Fan blades 312 are fixedly connected to the outer periphery of the connecting cylinder 311. Several fan blades 312 are provided, circumferentially spaced around the rotation axis of the connecting cylinder 311. In this embodiment, five fan blades 312 are provided, evenly distributed around the rotation axis of the connecting cylinder 311. The sliding assembly 2 also includes a first friction block 26. The outer wall of the rotating seat 25 is located outside the connecting ring 242. The first friction block 26 is coaxially fixedly connected to the surface of the rotating seat 25 near the connecting ring 242. The second friction block 32 is annular and surrounds the outer periphery of the connecting ring 242. A mounting groove 3111 is provided at the end of the connecting cylinder 311 away from the communicating cavity 15. The mounting groove 3111 communicates with the inner side of the connecting cylinder 311. The mounting groove 3111 is annular, and the first friction block 26 is embedded in the mounting groove 3111, abutting against the second friction block 32.

[0045] Reference Figure 4 and Figure 5 A convex ring 314 is coaxially fixedly connected to the end of the connecting cylinder 311 away from the connecting groove. Several rotating grooves 3141 are provided on the inner wall of the convex ring 314, and these grooves are circumferentially spaced around the axis of the convex ring 314. In this embodiment, there are six rotating grooves 3141, evenly distributed circumferentially around the axis of the convex ring 314. The heat dissipation assembly 3 also includes rotating blocks 33, the number of which is the same as the number of rotating grooves 3141 and corresponds one-to-one. Each rotating block 33 includes a rotating shaft 331, a connecting plate 332, and an abutment plate 333. The rotating shaft 331 is rotatably embedded in the rotating groove 3141, and the rotation axis of the rotating shaft 331 is parallel to but does not coincide with the rotation axis of the connecting cylinder 311. One end of the connecting plate 332 extends into the rotating groove 3141 and is fixedly connected to the outer wall of the rotating shaft 331. One end of the abutment plate 333 extends into the rotating groove 3141 and is fixedly connected to the outer wall of the rotating shaft 331. The abutment plate 333 and the connecting plate 332 are located on opposite sides of the axis of the rotating shaft 331. In this embodiment, the abutment plate 333 and the connecting plate 332 are perpendicular to each other.

[0046] The heat dissipation assembly 3 also includes a counterweight 34, an abutment block 35, and a second reset component 36. The number of counterweights 34, abutment blocks 35, and second reset components 36 is the same as the number of rotating blocks 33 and corresponds one-to-one. The counterweight 34 is fixedly connected to the end of the connecting plate 332 away from the rotating shaft 331, and the counterweight 34 is located on the side of the connecting plate 332 closer to the rotating seat 25. The abutment block 35 is fixedly connected to the end of the abutment plate 333 away from the rotating shaft 331, and the abutment block 35 is located on the side of the abutment plate 333 closer to the rotating seat 25. The mass of the counterweight 34 is greater than the mass of the abutment block 35. When the connecting cylinder 311 is rotating, the counterweight 34 tends to move away from the rotating seat 25, causing the abutment block 35 to tend to move closer to the rotating seat 25. A ring groove 253 is coaxially provided on the outer periphery of the rotating seat 25. The ring groove 253 is used for the insertion of the abutment plate 333 and the abutment block 35, and the groove wall of the ring groove 253 is used to abut against the groove wall of the abutment plate 333. A second reset member 36 is connected between the abutment plate 333 and the convex ring 314. The second reset member 36 causes the abutment block 35 to tend to move away from the rotating seat 25. In this embodiment, the reset member is a spring. A groove 3142 is provided on the groove wall of the rotating groove 3141. One end of the second reset member 36 is connected to the bottom of the groove 3142, and the other end of the second reset member 36 is connected to the side surface of the abutment plate 333 away from the rotating seat 25.

[0047] The implementation principle of a heat dissipation motor end cover according to an embodiment of this application is as follows: During assembly, the mounting ring 12 abuts against the motor housing, and the bolt passes through the mounting hole 121 and is threadedly connected to the motor housing to achieve relative fixation between the end cover body 1 and the motor housing. The motor output shaft passes through the transmission groove 251 and the connecting hole 13 and extends out of the end cover.

[0048] When the temperature inside the motor housing rises, the thermal expansion block 22 expands, pushing the insert 213 to slide, which in turn causes the sealing plate 21 to slide, causing the sealing plate 21 to separate from the cavity wall of the connecting cavity 15 near the receiving cavity 11. This allows the hot air inside the motor housing to exchange with the cooler air outside through the first connecting hole 13, the second connecting hole 13, and the vent hole 17.

[0049] If the temperature inside the motor housing drops, the sealing plate 21 slides close to the receiving cavity 11 under the action of the elastic force of the first reset member 23, the first protrusion 18 is embedded in the second connecting hole 211, and the second protrusion 212 is embedded in the first connecting hole 16.

[0050] If the temperature continues to rise, the first friction block 26 abuts against the second friction block 32, and the rotating shaft drives the fan 31 to rotate, accelerating the exchange of air in the accommodating cavity 11 with the outside air through the first connecting hole 13, the second connecting hole 13 and the vent hole 17. Under the action of centrifugal force, the counterweight block 34 moves away from the rotating shaft, pushing the rotating block 33 to rotate, so that the abutting plate 333 and the abutting block 35 are embedded in the annular groove 253, realizing that the fan 31 and the rotating seat 25 are relatively fixed along the axis, so that the fan 31 continues to rotate.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A heat dissipation motor end cover, characterized in that: The device includes an end cap body (1); an mounting ring (12) is connected to the outer periphery of one end of the end cap body (1) along the axial direction of the end cap body (1); the mounting ring (12) is provided with a plurality of mounting holes (121); the plurality of mounting holes (121) are circumferentially spaced around the axial direction of the end cap body (1); the mounting holes (121) are used for bolts to pass through and be threaded to the motor housing; a receiving cavity (11) is coaxially provided at one end of the end cap body (1) near the mounting ring (12); a connecting hole (13) is coaxially provided on the cavity wall of the receiving cavity (11); the connecting hole (13) is used for the motor output shaft to pass through; a plurality of heat dissipation fins (14) are connected to the outer wall of the end cap body (1); the plurality of heat dissipation fins (14) are circumferentially spaced around the end cap body (1); the heat dissipation fins (14) extend from the side surface of the end cap body (1) away from the mounting ring (12) to the side wall of the end cap body (1).

2. The heat dissipation motor end cover according to claim 1, characterized in that: The sidewall of the end cap body (1) is tapered along the axis of the end cap body (1) toward the side away from the mounting ring (12).

3. The heat dissipation motor end cover according to claim 1, characterized in that: The end cap body (1) is provided with a connecting cavity (15); the connecting cavity (15) is located on the side of the receiving cavity (11) near the connecting hole (13); the wall of the connecting cavity (15) near the receiving cavity (11) is provided with a first connecting hole (16); the first connecting hole (16) is connected to the receiving cavity (11); the wall of the connecting cavity (15) is provided with a vent hole (17); the vent hole (17) is connected to the outside.

4. The heat dissipation motor end cover according to claim 3, characterized in that: It also includes a sealing plate (21), a thermal expansion block (22), and a first reset member (23); the sealing plate (21) is slidably embedded in the communicating cavity (15); the sliding direction of the sealing plate (21) is parallel to the axis of the end cap body (1); the sealing plate (21) is provided with a second connecting hole (211); the second connecting hole (211) and the first connecting hole (16) are misaligned; the first reset member (23) is connected between the sealing plate (21) and the end cap body (1); the first reset member (23) makes the sealing plate (21) tend to abut against the cavity wall of the communicating cavity (15) near the receiving cavity (11); the thermal expansion block (22) is embedded in the communicating cavity (15); the thermal expansion block (22) is used to push the sealing plate (21) to slide away from the receiving cavity (11).

5. The heat dissipation motor end cover according to claim 4, characterized in that: The sealing plate (21) is connected to a second protrusion (212) on the side near the receiving cavity (11); the number of the second protrusions (212) is the same as the number of the first connecting holes (16) and they correspond one-to-one; the second protrusions (212) are used to be embedded in the first connecting holes (16); the communicating cavity (15) is connected to a first protrusion (18) on the side wall near the receiving cavity (11); the number of the first protrusions (18) is the same as the number of the second connecting holes (211) and they correspond one-to-one; the first protrusions (18) are used to be embedded in the second connecting holes (211).

6. The heat dissipation motor end cover according to claim 5, characterized in that: The outer periphery of the first protrusion (18) away from the receiving cavity (11) is provided with a first chamfer (181); the first chamfer (181) is used to abut against the wall of the second connecting hole (211); the outer periphery of the second protrusion (212) away from the sealing plate (21) is provided with a second chamfer (2121); the second chamfer (2121) is used to abut against the wall of the first connecting hole (16).

7. The heat dissipation motor end cover according to claim 4, characterized in that: It also includes a fan (31); the fan (31) is rotatably embedded in the receiving cavity (11); the rotation axis of the fan (31) coincides with the axis of the motor output shaft.

8. The heat dissipation motor end cover according to claim 7, characterized in that: It also includes a connecting frame (24) and a rotating seat (25); one end of the connecting frame (24) is connected to the closed plate (21); the rotating seat (25) is rotatably connected to the end of the connecting frame (24) away from the closed plate (21); the rotation axis of the rotating seat (25) coincides with the axis of the motor output shaft; a transmission groove (251) is provided on the inner side of the rotating seat (25); the transmission groove (251) is used for embedding the motor output shaft; the rotating seat (25) is circumferentially fixed to the motor output shaft; the rotating seat (25) is located on the side of the fan (31) away from the communicating cavity (15); the rotating seat (25) is used to abut against the side surface of the fan (31) away from the communicating cavity (15).

9. The heat dissipation motor end cover according to claim 8, characterized in that: It also includes a first friction block (26) and a second friction block (32); the first friction block (26) is connected to the side surface of the rotating seat (25) near the connecting frame (24); the second friction block (32) is connected to the side surface of the fan (31) away from the communicating cavity (15); the second friction block (32) is used to abut against the first friction block (26).

10. The heat dissipation motor end cover according to claim 8, characterized in that: It also includes a rotating block (33), a counterweight (34), an abutment block (35), and a second reset member (36); the rotating block (33) is rotatably connected to the fan (31); the rotation axis of the rotating block (33) is parallel to the rotation of the fan (31); the counterweight (34) is connected to one end of the rotating block (33); the abutment block (35) is connected to the other end of the rotating block (33); the abutment block (35) is used to press against the outer wall of the rotating seat (25); the counterweight (34) and the abutment block (35) are located on both sides of the rotation axis of the rotating block (33); the mass of the counterweight (34) is greater than the mass of the abutment block (35); when the fan (31) is rotating, the counterweight (34) tends to move away from the rotating seat (25); the second reset member (36) is connected between the rotating block (33) and the fan (31); the second reset member (36) makes the abutment block (35) tend to move away from the rotating seat (25).

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