An electric machine

Abstract

The application relates to a motor, which comprises a motor body, a rotating shaft and a plurality of heat dissipation fins, the rotating shaft is rotationally connected on the motor body, characterized in that a plurality of mounting strips are arranged on the motor body along the circumferential direction of the motor body, the plurality of mounting strips correspond to the plurality of heat dissipation fins respectively, and the heat dissipation fins are detachably connected on the corresponding mounting strips. When the heat dissipation fins are damaged by external force impact, the corresponding heat dissipation fins can be dismounted by an operator, and new undamaged heat dissipation fins are replaced, if there is no replaceable heat dissipation fin, the corresponding mounting strip can also be without the heat dissipation fin, and the problem that the damaged heat dissipation fin is easy to scratch the operator can be solved.

Description

Technical Field

[0001] This application relates to the field of electric motors, and more particularly to an electric motor. Background Technology

[0002] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction.

[0003] The invention patent with announcement number CN108832753A discloses a motor housing, including an integrally formed motor housing, a mounting base plate, and a storage compartment. The mounting base plate is located below the motor housing, and inclined reinforcing ribs are provided between the mounting base plate and the outer wall of the motor housing. Each of the four corners of the mounting base plate is provided with a first fixing bolt hole. A rectangular groove for placing a buffer rubber sheet is provided in the middle of the lower surface of the mounting base plate. The storage compartment is located above the motor housing, and guide posts are provided at the four corners of the inner wall of the storage compartment. The guide posts are provided with a second fixing bolt hole for screwing in fixing bolts to fix a storage compartment cover for covering the storage compartment. Several horizontally distributed heat dissipation fins are provided on the outer walls on both sides of the motor housing.

[0004] The above-mentioned technical solutions have the following defects: After the heat dissipation fins are damaged, there will be a break on the heat dissipation fins. When the operator moves the motor, the break can easily scratch the operator, which poses a safety hazard. Summary of the Invention

[0005] To address the issue of damaged heat dissipation fins easily scratching operators, this application provides an electric motor.

[0006] The electric motor provided in this application adopts the following technical solution: An electric motor includes a motor body, a rotating shaft, and multiple heat dissipation fins, wherein the rotating shaft is rotatably connected to the motor body, characterized in that: multiple mounting strips are provided on the motor body along the circumferential direction of the motor body, the multiple mounting strips respectively correspond to multiple heat dissipation fins, and the heat dissipation fins are detachably connected to the corresponding mounting strips.

[0007] By adopting the above technical solution, when the heat dissipation fins are damaged by external impact, the operator can remove the corresponding heat dissipation fins and replace them with new, undamaged heat dissipation fins. If there are no replaceable heat dissipation fins, the corresponding mounting strip can be left uninstalled, which can improve the problem that damaged heat dissipation fins can easily scratch the operator.

[0008] Preferably, the device further includes multiple driving devices. Multiple rotating rods are provided on the motor body along its circumferential direction. These rotating rods are rotatably connected to the motor body in a rotation direction parallel to the rotating shaft. Multiple mounting strips correspond to multiple rotating rods and are fixed to their respective rotating rods. The length direction of the heat dissipation fins is parallel to the axial direction of the corresponding rotating rod. The multiple rotating rods are divided into multiple groups of two, with two rotating rods in each group arranged adjacent to each other. The driving devices are used to drive the rotating rods to rotate. When the rotating rods in the same group rotate in opposite directions, the sides of the two heat dissipation fins corresponding to the same group of rotating rods that are facing each other either touch or move away from each other.

[0009] By adopting the above technical solution, the driving device can drive the rotating rod to rotate. When the two heat dissipation fins rotate to their opposite sides and come into contact with each other, it can be regarded as the two heat dissipation fins becoming one. The thickness of the heat dissipation fins increases, and they are subjected to force together, thereby improving the structural strength of the two heat dissipation fins. When the two heat dissipation fins rotate in a direction away from each other, the heat dissipation fins increase the contact area with the air, thereby achieving a better heat dissipation effect.

[0010] Preferably, the driving device includes a driving component, multiple torsion springs, multiple movable plates, and multiple thermal expansion and contraction blocks. The multiple torsion springs correspond to multiple rotating rods respectively. The torsion springs are mounted on the rotating rods and are used to drive two rotating rods in the same group to rotate in the direction where the two heat dissipation fins approach each other. The multiple movable plates correspond to multiple rotating rods respectively. The movable plates are fixed on the corresponding rotating rods and movably connected to the motor body. The two movable plates on the same group of rotating rods are arranged crosswise. The thermal expansion and contraction blocks are slidably connected to the motor body along an axis perpendicular to the rotating shaft. The driving component is used to drive multiple thermal expansion and contraction blocks to slide. The multiple thermal expansion and contraction blocks correspond to multiple sets of rotating rods. The thermal expansion and contraction blocks are located between two movable plates. The thermal expansion and contraction blocks are located on the side away from the corresponding rotating rod at the intersection of the two movable plates. When the motor shaft rotates, the driving component drives the thermal expansion and contraction blocks to move towards the intersection of the two movable plates. At the same time, when the motor temperature is higher than the rated value, the thermal expansion and contraction blocks are used to abut against the two movable plates and drive the two heat dissipation fins to rotate towards the side away from each other. When the shaft stops rotating, the driving component drives the thermal expansion and contraction blocks to move away from the intersection of the two movable plates. The thermal expansion and contraction blocks never contact the two movable plates.

[0011] By adopting the above technical solution, the driving component one is used to control the position of the thermal expansion and contraction block. Since the two movable plates are arranged in a cross pattern, the closer the thermal expansion and contraction block is to the intersection of the two movable plates, the smaller the distance between the two movable plates. After the thermal expansion and contraction block expands due to heat, it is easier to push the two movable plates to move, so that the corresponding two heat dissipation fins rotate toward the side away from each other, thereby improving the heat dissipation effect of the motor. When the driving component one drives the thermal expansion and contraction block to the intersection of the two movable plates away from each other, the distance between the two movable plates increases. At this time, no matter how the thermal expansion and contraction block expands, it will not contact the two movable plates. The two heat dissipation fins also automatically rotate to abut against each other under the action of the torsion spring, thereby increasing the structural strength of the heat dissipation fins. When the motor shaft rotates, it means that the motor has started to work. The motor will generate heat. At this time, the thermal expansion and contraction block controls whether the two heat dissipation fins open and the degree of opening according to the temperature of the motor, thereby achieving a good heat dissipation effect on the motor.

[0012] Preferably, the driving component includes multiple first push rods, multiple first springs, multiple centrifugal rods, multiple second springs, a turntable, and a deformable ring sleeve. The turntable is coaxially fixedly connected to the motor body. An annular groove is formed inside the motor body. The turntable is rotatably connected inside the annular groove. A gap is left between the outer wall of the turntable and the inner wall of the annular groove. Multiple grooves with length directions perpendicular to the axis of rotation are sequentially formed on the outer wall of the turntable along the circumferential direction of the turntable. Multiple centrifugal rods correspond to multiple grooves respectively. The centrifugal rods are slidably connected to the corresponding grooves along the length direction parallel to the corresponding groove. Multiple first springs correspond to multiple grooves respectively. The two ends of the first springs are fixed to the bottom wall of the corresponding groove and the corresponding centrifugal rod respectively. The end of the centrifugal rod away from the bottom wall of the groove is fixed to the circumferential inner wall of the ring sleeve. The ring sleeve is located within the gap. Multiple first push rods correspond to multiple thermal expansion and contraction blocks. The first push rods are slidably connected to the motor body along the sliding direction parallel to the thermal expansion and contraction blocks. One end of the first push rod is fixed to the corresponding thermal expansion and contraction block, and the other end of the first push rod extends into the gap and is used to abut against the circumferential outer wall of the ring. Multiple second springs correspond to the respective thermal expansion and contraction blocks. The second springs drive the corresponding thermal expansion and contraction blocks to always move towards one side of the ring so that the first push rod abuts against the ring.

[0013] By adopting the above technical solution, when the motor shaft rotates, it drives the turntable to rotate as well. The centrifugal rod on the turntable is subjected to centrifugal force and moves towards the ring sleeve, thereby expanding the ring sleeve and increasing its diameter. The first push rod abutting against the ring sleeve will also move away from the ring sleeve, thereby driving the thermal expansion and contraction block to move towards the intersection of the two movable plates. At this time, the thermal expansion and contraction block can push the two movable plates by its own thermal expansion. When the motor stops running, the shaft will also stop rotating with the turntable. Under the action of the first spring, the centrifugal rod moves towards the bottom wall of the settling tank, the diameter of the ring sleeve decreases, and the first push rod abutting against the ring sleeve will also move towards the ring sleeve under the action of the second spring, thereby driving the thermal expansion and contraction block to move away from the intersection of the two movable plates. At this time, the thermal expansion and contraction block cannot push the two movable plates by its own thermal expansion.

[0014] Preferably, it also includes a locking device, which is used to lock the position of multiple rotating rods when the sides of two heat dissipation fins corresponding to the same set of rotating rods are in contact with each other.

[0015] By adopting the above technical solution, since the rotating rod will rotate, the operator's force on the heat sink fins may overcome the elastic force of the torsion spring and drive the heat sink fins to rotate. In order to improve the connection strength between the heat sink fins and the motor body, a locking device is needed to lock the position of the rotating rod so that the heat sink fins are stably fixed on the motor body.

[0016] Preferably, the locking device includes multiple sets of locking components, which are spaced apart from multiple sets of rotating rods. Each locking component includes two locking rods, two third springs, and a second driving component. The two locking rods correspond to two adjacent rotating rods. A locking groove is formed on the outer wall of each rotating rod. The locking rod is slidably connected to the motor body along a direction perpendicular to the axis of the corresponding rotating rod. When the two heat dissipation fins of the same set of rotating rods are in contact with each other on their opposite sides, the end of the locking rod is facing the corresponding locking groove. The two third springs correspond to two locking rods respectively. The third springs always drive the locking rods to move toward the end away from the locking groove. When the rotating shaft stops rotating, the second driving component drives the two locking rods to move toward the locking groove and insert into it. When the rotating shaft rotates, the second driving component does not affect the movement of the locking rods, and the locking rods disengage from the corresponding locking grooves.

[0017] By adopting the above technical solution, when the shaft stops rotating, the motor stops running. At this time, the two heat dissipation fins in the same group are in contact with each other, and the driving component 2 drives the locking rod to lock the rod, which strengthens the stability of the connection between the heat dissipation fins and the motor body. At the same time, it keeps the two heat dissipation fins in the same group in abutting state, which enhances the structural strength of the heat dissipation fins. When the shaft rotates, the motor is running normally. At this time, the locking rod disengages from the locking groove and no longer locks the rod. The driving device can control the rotation of the rod to achieve a better heat dissipation effect.

[0018] Preferably, the second driving component includes a second push rod, a stop block, and a fourth spring. The stop block is located between the two locking rods and is slidably connected to the motor body along an axis perpendicular to the rotating shaft. The two locking rods are symmetrically arranged relative to the stop block. The stop block has a first inclined surface on each side facing the two locking rods. The locking rod has a second inclined surface on one side facing the stop block that matches the first inclined surface. The distance from the rotating shaft between the ends of the first inclined surfaces that are far apart and the ends that are close to each other gradually decreases. One end of the second push rod is fixed to the abutment block and slidably connected to the motor body along the sliding direction parallel to the abutment block. The other end of the second push rod extends into the gap. The fourth spring is set on the abutment block and drives the abutment block to always move toward the ring sleeve side. The end of the second push rod always abuts against the ring sleeve.

[0019] By adopting the above technical solution, when the rotating shaft rotates, the diameter of the ring sleeve increases. The ring sleeve drives the second push rod and the abutment block to overcome the elastic force of the fourth spring and push them away from the rotating shaft. At this time, the position of the first inclined surface of the abutment block changes. Under the action of the third spring, the locking rod always abuts against the first inclined surface. The two first inclined surfaces and the two locking rods will form two abutment points. The distance between the two abutment points will gradually decrease. At this time, the locking rod will gradually move away from the locking groove and out of the locking groove, thereby unlocking the rotating rod.

[0020] Preferably, a gear is coaxially fixedly connected to the rotating rod, and two gears on the same set of rotating rods are meshed with each other.

[0021] By adopting the above technical solution, the meshing of the two gears enables the two rotating rods to rotate synchronously. When the two heat dissipation fins of the same group are in contact, it can ensure that the two locking rods are aligned with the two locking slots, thus better locking the rotating rods.

[0022] In summary, this application includes at least one of the following beneficial technical effects: By setting up mounting strips and removable heat dissipation fins on the mounting strips, when the heat dissipation fins are damaged by external impact, the operator can remove the corresponding heat dissipation fins and replace them with new, undamaged heat dissipation fins. If there are no replaceable heat dissipation fins, the corresponding mounting strip can be left uninstalled, which can improve the problem that damaged heat dissipation fins can easily scratch the operator. By setting up a drive device, the drive device can drive the rotating rod to rotate. When the two heat dissipation fins rotate to their opposite sides and touch each other, the structural strength of the two heat dissipation fins is improved. When the two heat dissipation fins rotate in a direction away from each other, the heat dissipation fins increase their contact area with the air, thereby achieving a better heat dissipation effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure when the two heat dissipation fins are attached to each other in an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the overall structure when the two heat dissipation fins of this application are opened.

[0025] Figure 3 It is along Figure 1 A cross-sectional view along line AA in the middle.

[0026] Figure 4 yes Figure 3 Enlarged view of point B in the middle.

[0027] Figure 5 yes Figure 2 Enlarged view of point C in the middle.

[0028] Figure 6 It is along Figure 2 A cross-sectional view of the DD line.

[0029] Figure 7 yes Figure 6 Enlarged view of point E in the middle.

[0030] Figure 8 It is along Figure 1 A cross-sectional view of the FF line.

[0031] Figure 9 yes Figure 8 A magnified view of point G in the middle.

[0032] Explanation of reference numerals in the attached drawings: 1. Motor body; 11. Shaft; 12. Heat dissipation fins; 13. End cover; 14. Heat dissipation fins; 141. Mounting block; 142. Bolt; 15. Rotating rod; 151. Mounting strip; 152. Locking groove; 161. Rotating groove; 162. Movable groove; 163. Annular groove; 1631. Clearance; 164. Triangular block; 165. Limiting groove; 166. First groove; 2. Drive device; 21. Movable piece; 211. Connecting piece; 212. Pushing piece; 213. 1. Guide plate; 22. Thermal expansion and contraction block; 3. Drive component one; 31. First push rod; 32. First spring; 33. Centrifugal rod; 34. Second spring; 35. Turntable; 351. Settling groove; 36. Ring sleeve; 4. Locking device; 41. Locking component; 411. Locking rod; 4111. Limiting block; 4112. Second inclined surface; 412. Third spring; 42. Drive component two; 421. Second push rod; 422. Abutment block; 4221. First inclined surface; 423. Fourth spring. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0034] This application discloses an electric motor.

[0035] Reference Figure 1 , Figure 2 This embodiment of the motor includes a stator, a rotor, a motor body 1, a shaft 11, heat dissipation blades 12, an end cover 13, and multiple heat dissipation fins 14. The shaft 11 is rotatably connected to the motor body 1, and the axis of the shaft 11 is parallel to the length direction of the motor body 1. The stator is fixedly mounted on the motor body 1 and has coils wound on it. The rotor is mounted on the motor body 1 via the shaft 11. The rotor has silicon steel plates and also has coils. When both are in operation, current flows into the stator and rotor under the action of the coils, generating a magnetic field on the silicon steel plates, which drives the rotor to rotate. One end of the shaft 11 extends out of the motor body 1 and is fixedly connected to the heat dissipation blades 12. The end cover 13 is fixed to the end of the motor body 1 near the heat dissipation blades 12 and surrounds the heat dissipation blades 12.

[0036] Reference Figure 3 , Figure 4 Multiple sets of rotating rods 15 are rotatably connected to the motor body 1 along its circumferential direction. Each set of rotating rods 15 includes two rotating rods 15, and the rotation axis of the rotating rods 15 is parallel to the axis of the rotating shaft 11. To increase the contact area between the rotating rods 15 and the motor body 1, multiple rotating grooves 161 matching the rotating rods 15 are sequentially formed on the outer wall of the motor body 1 along its circumferential direction. The rotating rods 15 are rotatably connected in the corresponding rotating grooves 161, and most of the circumferential outer wall of the rotating rods 15 is attached to the circumferential inner wall of the rotating grooves 161.

[0037] Reference Figure 4 , Figure 5 A mounting strip 151 is fixed to the rotating rod 15. The mounting strip 151 is located on the outer wall of the motor body 1, and its length direction is parallel to the length direction of the rotating rod 15. Multiple heat dissipation fins 14 correspond to multiple mounting strips 151, and the heat dissipation fins 14 are detachably connected to the corresponding mounting strips 151. Mounting blocks 141 are fixed to both ends of the heat dissipation fins 14 along their length direction. Bolts 142 are connected to the mounting blocks 141, and one end of the bolts 142 passes through the mounting blocks 141 and is threaded onto the corresponding mounting strips 151. When the heat dissipation fins 14 are fixed to the mounting strips 151, the length direction of the heat dissipation fins 14 is parallel to the length direction of the mounting strips 151. Alternatively, inserts can be provided on the heat dissipation fins 14, and slots can be opened on the mounting strips 151. The heat dissipation fins 14 are fixed to the mounting strips 151 by inserting the inserts into the slots. The rotating rod 15, mounting strips 151, and heat dissipation fins 14 are all made of copper or aluminum alloy, which can achieve good heat dissipation.

[0038] Reference Figure 3 , Figure 4 The motor body 1 is equipped with a drive device 2, which drives the rotating rod 15 to rotate. Gears (not shown in the figure) are coaxially fixedly connected to the rotating rod 15, and two gears on the same set of rotating rods 15 are meshed together. (Refer to...) Figure 2 , Figure 4 When the same set of rotating rods 15 rotates in opposite directions, the two heat dissipation fins 14 corresponding to the same set of rotating rods 15 will either be in contact with each other or move away from each other on their opposite sides.

[0039] Reference Figure 3 , Figure 4 The driving device 2 can drive the rotating rod 15 to rotate. When the two heat dissipation fins 14 rotate to their opposite sides touching, it can be considered that the two heat dissipation fins 14 are combined into one. The thickness of the heat dissipation fins 14 increases, and they are subjected to force together, thereby improving the structural strength of the two heat dissipation fins 14; see reference. Figure 6 , Figure 7 When the two heat dissipation fins 14 rotate in a direction away from each other, the heat dissipation fins 14 increase the contact area with the air, thereby achieving a better heat dissipation effect.

[0040] Reference Figure 3 , Figure 4The drive device 2 includes a drive component 3, multiple torsion springs, multiple movable plates 21, and multiple thermal expansion and contraction blocks 22. The multiple torsion springs correspond to multiple rotating rods 15 respectively. The torsion springs are coaxially arranged on the corresponding rotating rods 15 and are used to drive two rotating rods 15 in the same group to rotate in the direction that the two heat dissipation fins 14 approach each other. When there is no external force, the two heat dissipation fins 14 in the same group are fitted together. At this time, the width direction of the heat dissipation fins 14 is perpendicular to the outer wall of the motor body 1.

[0041] Reference Figure 3 , Figure 4 Multiple movable plates 21 correspond to multiple rotating rods 15. Each movable plate 21 is fixed to its corresponding rotating rod 15 and movably connected within the motor body 1. Two movable plates 21 on the same set of rotating rods 15 are arranged intersectingly. Each movable plate 21 includes a connecting plate 211, a pushing plate 212, and a guide plate 213. The two ends of the pushing plate 212 along its length are fixed to one end of the connecting plate 211 and the guide plate 213 along their respective lengths. The end of the connecting plate 211 furthest from the pushing plate 212 is fixed to the corresponding rotating rod 15. The mounting strip 151 and the connection points of the connecting plate 211 with the rotating shaft 11 are located on opposite sides of the axis of the rotating shaft 11. When two heat dissipation fins 14 in the same group are in contact with each other, the two mounting strips 151 are arranged intersectingly, and the lengths of the two pushing plates 212 are parallel to each other and parallel to the width direction of the corresponding rotating rod 15. The distance between the two guide plates 213 gradually increases from the end closer to the pushing plate 212 to the end furthest from the pushing plate 212. Regardless of the location of the thermal expansion and contraction block 22 or how it expands, the ends of the two guide plates 213 that are far apart from each other are always located on both sides of the corresponding thermal expansion and contraction block 22.

[0042] Reference Figure 3 , Figure 4 The thermal expansion and contraction block 22 can be a nylon block or a heat-sensitive plastic. The thermal expansion and contraction block 22 is slidably connected within the motor body 1 along an axis perpendicular to the rotating shaft 11. Multiple thermal expansion and contraction blocks 22 correspond to multiple sets of rotating rods 15. The thermal expansion and contraction block 22 is located between two movable pieces 21 connected to the corresponding rotating rod 15, and is located on the side away from the corresponding rotating rod 15 at the intersection of two mounting strips 151. The driving component 3 is used to drive the multiple thermal expansion and contraction blocks 22 to slide. Multiple movable slots 162 are provided within the motor body 1. These slots correspond to multiple sets of movable pieces 21 and multiple thermal expansion and contraction blocks 22, and the movable pieces 21 and thermal expansion and contraction blocks 22 are movably connected within their respective movable slots 162.

[0043] Reference Figure 6 , Figure 7When the motor shaft 11 rotates, the drive component 3 drives the thermal expansion and contraction block 22 to move directly opposite the two push plates 212. Simultaneously, when the motor temperature exceeds the rated value (the temperature at which the motor operates normally, such as in high-temperature environments where the motor temperature may exceed the rated value), the thermal expansion and contraction block 22 abuts against the two push plates 212 and drives the two heat dissipation fins 14 to rotate towards opposite sides. (Refer to...) Figure 3 , Figure 4 When the rotating shaft 11 stops rotating, the driving component 3 drives the thermal expansion and contraction block 22 to move to the side of the guide plate 213 away from the pushing plate 212, and the thermal expansion and contraction block 22 never contacts the two moving plates 21.

[0044] Reference Figure 3 , Figure 4 When the driving component 3 drives the thermal expansion and contraction block 22 to move to the side of the guide plate 213 away from the pushing plate 212, no matter how the thermal expansion and contraction block 22 expands, it will not contact the two movable plates 21. The two heat dissipation fins 14 will also automatically rotate to abut against each other under the action of the torsion spring, thereby increasing the structural strength of the heat dissipation fins 14.

[0045] Reference Figure 6 , Figure 7 When the motor shaft 11 rotates, it indicates that the motor has started working. The motor generates heat during operation. At this time, the thermal expansion and contraction block 22 controls whether and to what extent the two heat dissipation fins 14 open according to the motor temperature, thus achieving a good heat dissipation effect on the motor. (Refer to...) Figure 3 , Figure 4 When the motor shaft 11 stops rotating, it means that the motor has stopped working. Under normal circumstances, the motor will no longer generate heat. At this time, it is not necessary to improve the heat dissipation effect of the motor. Instead, the two heat dissipation fins 14 should be made to fit together to improve the structural strength of the heat dissipation fins 14. Since the motor will be moved when it stops working, it is more important to improve the structural strength of the heat dissipation fins 14 to protect them.

[0046] Reference Figure 3 , Figure 4The drive component 3 includes multiple first push rods 31, multiple first springs 32, multiple centrifugal rods 33, multiple second springs 34, a turntable 35, and a deformable ring sleeve 36. The turntable 35 is coaxially fixedly connected to the motor body 1. An annular groove 163 is provided on the inner wall of the motor body 1. The turntable 35 is rotatably connected in the annular groove 163. A gap 1631 is left between the outer wall of the turntable 35 and the inner wall of the annular groove 163. Multiple sinks 351 are evenly provided on the outer wall of the turntable 35 along the circumferential direction of the turntable 35. The length direction of the sinks 351 is perpendicular to the axis of the rotating shaft 11. Centrifugal rods 33 are slidably connected in the sinks 351 along the length direction of the sinks 351. Multiple first springs 32 correspond to multiple sinks 351 respectively. The two ends of the first springs 32 are fixed to the bottom wall of the corresponding sink 351 and the corresponding centrifugal rods 33 respectively. The end of the centrifugal rods 33 away from the bottom wall of the sink 351 is fixed to the circumferential inner wall of the ring 36. The ring 36 surrounds the turntable 35 and the multiple centrifugal rods 33. The ring 36 is completely located within the gap 1631.

[0047] Reference Figure 3 , Figure 4 Multiple first push rods 31 correspond to multiple thermal expansion and contraction blocks 22. One end of the first push rod 31 is fixed to the corresponding thermal expansion and contraction block 22, and the other end of the first push rod 31 extends into the gap 1631 and abuts against the circumferential outer wall of the ring 36. The first push rod 31 is slidably connected to the motor body 1 along a sliding direction parallel to the corresponding thermal expansion and contraction block 22. A triangular block 164 is fixed in the movable slot 162. The triangular block 164 is located between two connecting pieces 211. When the two heat dissipation fins 14 of the same group rotate to abut against each other, the two connecting pieces 211 will abut against the inclined side walls on both sides of the triangular block 164. Multiple second springs 34 correspond to the corresponding thermal expansion and contraction blocks 22. The two ends of the second springs 34 abut against the triangular block 164 and the side of the thermal expansion and contraction block 22 facing each other. The second springs 34 are always in a compressed state. The second springs 34 drive the corresponding thermal expansion and contraction blocks 22 to always move towards the ring 36 so that the first push rod 31 abuts against the ring 36.

[0048] Reference Figure 6 , Figure 7 When the motor shaft 11 rotates, it drives the turntable 35 to rotate as well. The centrifugal rod 33 on the turntable 35 is subjected to centrifugal force and moves towards the ring 36, thereby expanding the ring 36 and increasing its diameter. The first push rod 31, which is abutting against the ring 36, also moves away from the ring 36, thereby driving the thermal expansion and contraction block 22 towards the intersection of the two movable plates 21. At this time, the thermal expansion and contraction block 22 can push the two movable plates 21 by its own thermal expansion. (Refer to...) Figure 3 , Figure 4When the motor stops running, the rotating shaft 11 will also stop rotating along with the turntable 35. The centrifugal rod 33 moves toward the bottom wall of the settling tank 351 under the action of the first spring 32. The diameter of the ring sleeve 36 becomes smaller, and the first push rod 31, which abuts against the ring sleeve 36, will also move toward the ring sleeve 36 under the action of the second spring 34. This will cause the thermal expansion and contraction block 22 to move toward the side away from the intersection of the two movable pieces 21. At this time, the thermal expansion and contraction block 22 cannot push the two movable pieces 21 by its own thermal expansion.

[0049] Reference Figure 8 , Figure 9 The motor body 1 is equipped with a locking device 4. When the two heat dissipation fins 14 corresponding to the same set of rotating rods 15 are in contact with each other on their opposite sides, the locking device 4 is used to lock the position of multiple rotating rods 15.

[0050] Reference Figure 8 , Figure 9 The locking device 4 includes multiple sets of locking components 41, which are spaced apart from each other with multiple sets of rotating rods 15. Each locking component 41 includes two locking rods 411, two third springs 412, and a driving component 42. When some locking components 41 do not have adjacent rotating rods 15, there is only one locking rod 411 and one third spring 412 in the locking component 41. Taking two sets of rotating rods 15 on each of the adjacent sides of the locking member 41 as an example, the two locking rods 411 correspond to the two adjacent rotating rods 15 respectively. The locking rods 411 are slidably connected in the motor body 1 along the direction perpendicular to the axis of the corresponding rotating rod 15. The distance between the two locking rods 411 and the rotating shaft 11 gradually increases from the end that is close to the other end to the end that is far away from the other end. The outer wall of the rotating rod 15 is provided with a locking groove 152 for the end of the locking rod 411 to be inserted. When the two heat dissipation fins 14 corresponding to the same set of rotating rods 15 are in contact with each other on their opposite sides, the end of the locking rod 411 is in contact with the corresponding locking groove 152.

[0051] Reference Figure 8 , Figure 9A limiting block 4111 is fixed on the outer wall of the locking rod 411. Multiple limiting grooves 165 are provided inside the motor body 1. The multiple limiting grooves 165 correspond to multiple limiting blocks 4111 respectively. The limiting blocks 4111 are slidably connected to the limiting grooves 165 along the sliding direction parallel to the corresponding locking rod 411. Two third springs 412 correspond to two locking rods 411 respectively. The two ends of the third springs 412 are fixedly connected to the side of the limiting block 4111 away from the corresponding locking groove 152 and the side of the limiting groove 165 away from the corresponding locking groove 152 respectively. The third springs 412 always drive the locking rod 411 to move toward the end away from the locking groove 152. When the rotating shaft 11 stops rotating, the second driving component 42 drives the two locking rods 411 to move toward the locking groove 152 and insert into the locking groove 152. When the rotating shaft 11 rotates, the second driving component 42 does not affect the movement of the locking rods 411. At this time, the locking rods 411 automatically disengage from the corresponding locking grooves 152.

[0052] Reference Figure 8 , Figure 9 When the shaft 11 stops rotating, the motor stops running. At this time, the two heat dissipation fins 14 in the same group are in contact with each other. The driving component 2 42 drives the locking rod 411 to insert into the locking groove 152 to lock the rotating rod 15, which strengthens the stability of the connection between the heat dissipation fins 14 and the motor body 1, and at the same time keeps the two heat dissipation fins 14 in the same group in abutting state, which enhances the structural strength of the heat dissipation fins 14. When the shaft 11 rotates, the motor is running normally. At this time, the locking rod 411 disengages from the locking groove 152 and no longer locks the rotating rod 15. The driving device 2 can control the rotation of the rotating rod 15 to achieve a better heat dissipation effect.

[0053] Reference Figure 8 , Figure 9The driving component 42 includes a second push rod 421, an abutment block 422, and a fourth spring 423. Multiple first grooves 166 are sequentially formed along the circumferential direction inside the motor body 1. Each of the multiple first grooves 166 corresponds to a multiple abutment blocks 422. The abutment blocks 422 are located between two locking rods 411 and are slidably connected within the corresponding first groove 166 along an axis perpendicular to the rotating shaft 11. The two locking rods 411 are symmetrically arranged relative to the abutment blocks 422. First inclined surfaces 4221 are formed on both sides of the abutment blocks 422 facing the two locking rods 411. The distance from the rotating shaft 11 to the ends of the first inclined surfaces 4221 that are far apart to those that are close together gradually decreases. A second inclined surface 4112 matching the first inclined surface 4221 is formed on one side of the locking rod 411 facing the abutment block 422. The fourth spring 423 is located within the corresponding first groove 166. Both ends of the fourth spring 423 abut against the side of the first groove 166 away from the rotating shaft 11 and the side of the abutment block 422 away from the rotating shaft 11, respectively. The fourth spring 423 is always in a compressed state. Under the combined action of the third spring 412 and the fourth spring 423, the ends of the two locking rods 411 always abut against the abutment block 422, and the two first inclined surfaces 4221 always fit against the two second inclined surfaces 4112.

[0054] Reference Figure 8 , Figure 9 One end of the second push rod 421 is fixed on the abutment block 422. The second push rod 421 is slidably connected in the motor body 1 along the sliding direction parallel to the corresponding abutment block 422. The other end of the second push rod 421 extends into the gap 1631 and always abuts against the ring 36.

[0055] Reference Figure 8 , Figure 9 When the rotating shaft 11 rotates, the diameter of the ring 36 increases. The ring 36 drives the second push rod 421 and the abutment block 422 to overcome the elastic force of the fourth spring 423 and push them away from the rotating shaft 11. At this time, the position of the first inclined surface 4221 of the abutment block 422 changes. The locking rod 411 is always abutted on the first inclined surface 4221 under the action of the third spring 412. The two first inclined surfaces 4221 and the two locking rods 411 will form two abutment points. The distance between the two abutment points will gradually decrease. At this time, the locking rod 411 will gradually move away from the locking groove 152 and move out of the locking groove 152, thereby unlocking the rotating rod 15.

[0056] The implementation principle of the motor in this embodiment is as follows: When the heat dissipation fin 14 is damaged by an external impact, the operator can remove the corresponding heat dissipation fin 14 and replace it with a new, undamaged heat dissipation fin 14. If there is no replaceable heat dissipation fin 14, the corresponding mounting strip 151 can be left unmounted, which can improve the problem of damaged heat dissipation fins 14 easily scratching the operator. At the same time, when the motor starts, the heat dissipation fins 14 selectively open according to the motor temperature to improve the motor's heat dissipation effect. When the motor stops running, the locking device 4 locks the rotating rod 15, and the two heat dissipation fins 14 in the same group are fixed to the motor body 1 and abut against each other, which can enhance the structural strength of the heat dissipation fins 14.

[0057] 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. An electric machine comprising an electric machine body (1), a rotating shaft (11) and a plurality of heat dissipation fins (14), the rotating shaft (11) being rotatably connected to the electric machine body (1), characterized in that: The motor body (1) is provided with a plurality of mounting strips (151) along the circumferential direction of the motor body (1), and the plurality of mounting strips (151) correspond to a plurality of heat dissipation fins (14), and the heat dissipation fins (14) are detachably connected to the corresponding mounting strips (151). It also includes multiple drive devices (2). Multiple rotating rods (15) are provided on the motor body (1) along the circumferential direction of the motor body (1). The rotating rods (15) are rotatably connected to the motor body (1). The rotation axis of the rotating rods (15) is parallel to the axis of the rotating shaft (11). Multiple mounting strips (151) correspond to multiple rotating rods (15). The mounting strips (151) are fixed on the corresponding rotating rods (15). The length direction of the heat dissipation fins (14) is parallel to the axis of the corresponding rotating rods (15). The multiple rotating rods (15) are divided into multiple groups in pairs. The two rotating rods (15) in each group are arranged adjacent to each other. The drive device (2) is used to drive the rotating rods (15) to rotate. When the rotating rods (15) in the same group rotate in opposite directions, the two heat dissipation fins (14) corresponding to the rotating rods (15) in the same group are either in contact with each other or far apart. The drive device (2) includes a drive component (3), multiple torsion springs, multiple movable plates (21), and multiple thermal expansion and contraction blocks (22). The multiple torsion springs correspond to multiple rotating rods (15). The torsion springs are set on the rotating rods (15) and are used to drive two rotating rods (15) in the same group to rotate in the direction that the two heat dissipation fins (14) approach each other. The multiple movable plates (21) correspond to multiple rotating rods (15). The movable plates (21) are fixed on the corresponding rotating rods (15) and movably connected in the motor body (1). The two movable plates (21) on the same group of rotating rods (15) are arranged crosswise. The thermal expansion and contraction block (22) is slidably connected in the motor body (1) along the axis perpendicular to the rotating shaft (11). The driving component (3) is used to drive multiple thermal expansion and contraction blocks (22) to slide. The multiple thermal expansion and contraction blocks (22) correspond to multiple sets of rotating rods (15). The thermal expansion and contraction block (22) is located between two movable plates (21). The thermal expansion and contraction block (22) is located on the side away from the corresponding rotating rod (15) at the intersection of the two movable plates (21). When the motor shaft (11) rotates, the driving component (3) 3) Drive the thermal expansion and contraction block (22) to move toward the intersection of the two corresponding movable plates (21). At the same time, when the motor temperature is higher than the rated value, the thermal expansion and contraction block (22) is used to abut against the two movable plates (21) and drive the two heat dissipation fins (14) to rotate toward the side away from each other. When the rotating shaft (11) stops rotating, the driving component (3) drives the thermal expansion and contraction block (22) to move toward the intersection away from the two movable plates (21). The thermal expansion and contraction block (22) never contacts the two movable plates (21).

2. The motor according to claim 1, characterized in that: The drive component (3) includes multiple first push rods (31), multiple first springs (32), multiple centrifugal rods (33), multiple second springs (34), a turntable (35), and a deformable ring (36). The turntable (35) is coaxially fixedly connected to the rotating shaft (11). An annular groove (163) is provided inside the motor body (1). The turntable (35) is rotatably connected in the annular groove (163). A gap (1631) is left between the outer wall of the turntable (35) and the inner wall of the annular groove (163). Multiple springs perpendicular to the rotation direction are sequentially opened on the outer wall of the turntable (35) along the circumferential direction of the turntable (35). A settling trough (351) is located along the axis of shaft (11). Multiple centrifugal rods (33) correspond to multiple settling troughs (351) respectively. The centrifugal rods (33) are slidably connected to the corresponding settling troughs (351) along the length direction parallel to the corresponding settling troughs (351). Multiple first springs (32) correspond to multiple settling troughs (351) respectively. The two ends of the first springs (32) are fixed to the bottom wall of the corresponding settling trough (351) and the corresponding centrifugal rods (33) respectively. The end of the centrifugal rod (33) away from the bottom wall of the settling trough (351) is fixed to the circumferential inner wall of the ring (36). The ring (36) is located in the gap (1631). Multiple first push rods (31) correspond to multiple thermal expansion and contraction blocks (22) respectively. The first push rods (31) are slidably connected to the motor body (1) along the sliding direction parallel to the thermal expansion and contraction blocks (22). One end of the first push rod (31) is fixed on the corresponding thermal expansion and contraction block (22). The other end of the first push rod (31) extends into the gap (1631) and is used to abut against the circumferential outer wall of the ring sleeve (36). Multiple second springs (34) correspond to multiple thermal expansion and contraction blocks (22) respectively. The second springs (34) drive the corresponding thermal expansion and contraction blocks (22) to always move toward the ring sleeve (36) so that the first push rods (31) abut against the ring sleeve (36).

3. The motor according to claim 2, characterized in that: It also includes a locking device (4), which is used to lock the position of multiple rotating rods (15) when the two heat dissipation fins (14) corresponding to the same set of rotating rods (15) are in contact with each other on their opposite sides.

4. The motor according to claim 3, characterized in that: The locking device (4) includes multiple sets of locking components (41), which are spaced apart from each other with multiple sets of rotating rods (15). Each locking component (41) includes two locking rods (411), two third springs (412), and a second driving component (42). The two locking rods (411) correspond to two adjacent rotating rods (15). A locking groove (152) is provided on the outer wall of each rotating rod (15). The locking rod (411) is slidably connected in the motor body (1) along a direction perpendicular to the axis of the corresponding rotating rod (15). When the two heat dissipation fins (14) corresponding to the same set of rotating rods (15) are in contact with each other on their opposite sides, the locking mechanism is activated. The end of the locking rod (411) is directly opposite the corresponding locking groove (152). Two third springs (412) are respectively corresponding to the two locking rods (411). The third springs (412) always drive the locking rods (411) to move toward the end away from the locking groove (152). When the rotating shaft (11) stops rotating, the second driving member (42) is used to drive the two locking rods (411) to move toward the side of the locking groove (152) and insert into the locking groove (152). When the rotating shaft (11) rotates, the second driving member (42) does not affect the movement of the locking rods (411), and the locking rods (411) disengage from the corresponding locking groove (152).

5. The motor according to claim 4, characterized in that: The second driving component (42) includes a second push rod (421), an abutment block (422) and a fourth spring (423). The abutment block (422) is located between two locking rods (411) and is slidably connected in the motor body (1) along the axis perpendicular to the rotating shaft (11). The two locking rods (411) are symmetrically arranged relative to the abutment block (422). The abutment block (422) has a first inclined surface (4221) on each side facing the two locking rods (411). The locking rod (411) has a second inclined surface (4112) matching the first inclined surface (4221) on one side facing the abutment block (422). The distance from the first inclined surface (4221) to the rotating shaft (11) gradually decreases from the end that is far away from each other to the end that is close to each other. One end of the second push rod (421) is fixed on the abutment block (422) and slidably connected in the motor body (1) along the sliding direction parallel to the abutment block (422). The other end of the second push rod (421) extends into the gap (1631). The fourth spring (423) is set on the abutment block (422) and drives the abutment block (422) to always move toward the ring sleeve (36). The end of the second push rod (421) always abuts against the ring sleeve (36).

6. The motor according to claim 4, characterized in that: Gears are coaxially fixedly connected to the rotating rod (15), and two gears on the same set of rotating rods (15) mesh with each other.

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