A motor heat dissipation device and a stepping motor using the same

Abstract

The application discloses a motor heat dissipation device and a stepping motor applying the same, and relates to the technical field of motors. The motor heat dissipation device comprises a heat dissipation assembly, the heat dissipation assembly comprises a heat dissipation cylinder, the heat dissipation cylinder is used for sleeving outside a motor, the heat dissipation cylinder is provided with a water passing cavity, and an inner wall of the heat dissipation cylinder is provided with a water passing groove; the heat dissipation assembly further comprises a water inlet pipe and a water outlet pipe, the water inlet pipe is communicated with the water passing cavity, and the water outlet pipe penetrates through the heat dissipation cylinder; a sealing assembly is arranged, the sealing assembly comprises a sliding plate which is slidably arranged in the water passing cavity, the sliding plate is used for opening or closing the water passing groove; a poking assembly is arranged, the poking assembly comprises a poking ring, the poking ring is arranged outside the heat dissipation cylinder, the sliding plate is connected with the poking ring, and the poking ring is used for moving the sliding plate. The application can improve the heat dissipation efficiency of the motor and reduce the overheat of the motor.

Description

Technical Field

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

[0002] A stepper motor is a type of electric motor that converts electrical pulse signals into corresponding angular or linear displacement. For each input pulse signal, the rotor rotates by an angle or moves forward one step. The output angular or linear displacement is proportional to the number of input pulses, and the rotational speed is proportional to the pulse frequency.

[0003] In related technologies, stepper motors generally include a stator, rotor, housing, and output shaft. Stepper motors can generate heat when connected to a load or operating for extended periods. Heat dissipation and cooling of stepper motors typically rely on heat exchange between the housing and the air, or by adding a heat dissipation medium and transferring heat to that medium.

[0004] However, in related technologies, if the stepper motor directly exchanges heat with the air, the heat transfer speed is slow, the heat dissipation efficiency is low, and it is easy for heat dissipation to be untimely. If the stepper motor transfers heat to the heat dissipation medium, the heat dissipation medium will heat up after a period of time, causing the heat dissipation effect to gradually deteriorate. If the stepper motor cannot dissipate heat in time, it can easily affect the dynamic response of the stepper motor, reduce the running accuracy and stability, and even reduce the service life of the stepper motor. Summary of the Invention

[0005] In order to improve the heat dissipation efficiency of the motor and reduce the occurrence of overheating, this application provides a motor heat dissipation device and a stepper motor using the device.

[0006] This application provides a motor heat dissipation device and a stepper motor using the device, adopting the following technical solution:

[0007] A motor cooling device, comprising:

[0008] A heat dissipation assembly includes a heat dissipation cylinder for being fitted onto the outside of a motor; the heat dissipation cylinder has a water passage cavity and a water passage groove on its inner wall; the heat dissipation assembly also includes an inlet pipe and an outlet pipe, the inlet pipe being connected to the water passage cavity and the outlet pipe passing through the heat dissipation cylinder;

[0009] A sealing assembly, the sealing assembly including a sliding plate slidably disposed within the water passage cavity, the sliding plate being used to open or close the water passage groove;

[0010] A toggle assembly, comprising a toggle ring disposed outside the heat sink cylinder, and the slide plate connected to the toggle ring, the toggle ring being used to move the slide plate.

[0011] By adopting the above technical solution, water is introduced into the inlet pipe and flows into the water passage chamber. When the actuating ring moves the sliding plate to open the water passage groove, the water flows into the space between the heat sink and the motor housing. The water eventually gathers and is discharged from the outlet pipe, which can absorb the heat of the motor and improve the heat dissipation efficiency.

[0012] Optionally, the slide plate is arranged along the length direction of the heat dissipation cylinder, and the slide plate has multiple notches along its length direction; multiple water channels are provided, and the positions of the multiple notches correspond to the positions of the multiple water channels.

[0013] By adopting the above technical solution, when the slide moves to connect multiple missing pipes with multiple water channels, water can flow downwards simultaneously to evenly enter between the heat sink and the motor housing, thereby improving the heat dissipation efficiency of the motor.

[0014] Optionally, the sealing assembly further includes:

[0015] A guide rail is provided on the inner wall of the water passage cavity, and the slide plate is slidably disposed on the guide rail;

[0016] A reset element is disposed within the water passage cavity, and the reset element resets the slide plate.

[0017] By adopting the above technical solution, when the actuating ring moves the slide plate, the slide plate slides along the guide rail. At this time, the slide plate can open the water channel, and water flows into the space between the heat sink and the motor housing. When the actuating ring does not move the slide plate, the reset component resets the slide plate. At this time, the slide plate closes the water channel, and the water flow stops flowing into the space between the heat sink and the motor housing, which can save water consumption.

[0018] Optionally, the reset element includes:

[0019] A baffle block is disposed on the inner wall of the water passage cavity;

[0020] A guide rod, one end of which passes through the slide plate and the other end of which is connected to the stop block;

[0021] A spring, which is sleeved on the guide rod.

[0022] By adopting the above technical solution, when the actuating ring moves the slide plate, the guide rod can guide the sliding direction of the slide plate. The slide plate slides along the guide rail and compresses the spring. At this time, the slide plate opens the water channel to allow water to flow into the space between the heat sink and the motor housing for heat dissipation. When the actuating ring does not move the slide plate, the spring causes the slide plate to return to its original position. At this time, the slide plate closes the water channel to reduce water consumption.

[0023] Optionally, the toggle assembly further includes:

[0024] A toggle plate, which is used to be sleeved on the output shaft of the motor;

[0025] A trigger is provided, which is disposed between the toggle ring and the toggle plate, and the toggle plate moves the toggle ring via the trigger.

[0026] By adopting the above technical solution, when the output shaft of the motor rotates, it drives the actuating plate to rotate, thereby driving the actuating ring to move through the trigger, which in turn drives the sliding plate to slide, so as to control the opening and closing of the water channel, allowing water to intermittently enter between the heat sink and the motor housing.

[0027] Optionally, the trigger includes:

[0028] The first convex ball is disposed on the side of the actuating ring near the actuating plate;

[0029] The second convex ball is disposed on the side of the toggle plate near the toggle ring, and the position of the second convex ball corresponds to that of the first convex ball.

[0030] By adopting the above technical solution, when the actuating plate rotates, the first convex ball can contact the second convex ball, thereby pushing the actuating ring to move. The actuating ring drives the sliding plate to slide to control the water flow to intermittently enter between the heat sink and the motor housing.

[0031] Optionally, the heat dissipation component includes a first heat dissipation fin, which is disposed on the inner wall of the heat dissipation cylinder.

[0032] By adopting the above technical solution, when water flows from the water channel into the space between the heat sink and the motor housing, the water can enter between the adjacent first heat sink fins, which can increase the heat dissipation area and improve the heat exchange efficiency.

[0033] Optionally, the first heat dissipation fin is hollow and communicates with the water passage cavity.

[0034] By adopting the above technical solution, since the first heat dissipation fin is connected to the water passage cavity, water flows into the interior of the first heat dissipation fin, and the first heat dissipation fin can exchange heat with the water flow in a timely manner after absorbing the heat of the motor housing.

[0035] Secondly, this application also provides a stepper motor using the above-mentioned motor heat dissipation device, including a second heat dissipation fin, the second heat dissipation fin being connected to the motor housing; the second heat dissipation fin cooperates with the first heat dissipation fin, and the second heat dissipation fin and the first heat dissipation fin are alternately arranged.

[0036] By adopting the above technical solution, since the first heat dissipation fins and the second heat dissipation fins are arranged alternately, the heat of the motor is transferred to the second heat dissipation fins and can be exchanged with the adjacent first heat dissipation fins; the water flowing in from the water channel can wet the space between the adjacent first heat dissipation fins and the second heat dissipation fins, which can also improve the heat dissipation efficiency.

[0037] Optionally, from the outside of the heat sink towards the inside of the heat sink, the cross-sectional area of ​​the first heat sink fin gradually increases, while the cross-sectional area of ​​the second heat sink fin gradually decreases.

[0038] By adopting the above technical solution, the contact surfaces of the first heat dissipation fin and the second heat dissipation fin are inclined, which can increase the contact area and thus improve the heat dissipation efficiency; at the same time, it is also beneficial to the stability of the heat dissipation cylinder after it is fitted onto the motor housing, reducing the vibration caused by the motor running and the heat dissipation cylinder.

[0039] In summary, this application includes at least one of the following beneficial effects:

[0040] 1. The rotation of the motor output shaft drives the actuating plate to rotate, thereby causing the slide plate to slide, which in turn controls the water flow to intermittently enter the space between the heat sink and the motor housing through the water channel, so as to improve the heat dissipation efficiency through water cooling.

[0041] 2. The contact surfaces of the first and second heat dissipation fins are inclined to increase the heat dissipation area;

[0042] 3. The water flow can wet the adjacent first and second heat dissipation fins, and can remove the heat from the motor in time. Attached Figure Description

[0043] Figure 1 This is an overall schematic diagram of the motor heat dissipation device in Embodiment 1 of this application;

[0044] Figure 2 This is a schematic diagram of removing the outer wall of the heat sink in Embodiment 1 of this application;

[0045] Figure 3 This is an exploded schematic diagram of the motor cooling device in Embodiment 1 of this application;

[0046] Figure 4 yes Figure 3 An enlarged schematic diagram of part A in the middle;

[0047] Figure 5 This is a schematic diagram illustrating the sealing assembly in Embodiment 1 of this application;

[0048] Figure 6 This is an exploded view of the sealing assembly in Embodiment 1 of this application;

[0049] Figure 7 yes Figure 6 Enlarged schematic diagram of part B in the middle;

[0050] Figure 8 This is an exploded schematic diagram of the motor cooling device in Embodiment 1 of this application;

[0051] Figure 9 This is an exploded view of the toggle assembly shown in Embodiment 1 of this application;

[0052] Figure 10 This is an exploded view of the toggle assembly shown in Embodiment 1 of this application;

[0053] Figure 11 This is an overall schematic diagram of the stepper motor in Embodiment 2 of this application;

[0054] Figure 12 This is a cross-sectional schematic diagram of the stepper motor in Embodiment 2 of this application.

[0055] Explanation of reference numerals in the attached drawings: 1. Heat dissipation assembly; 11. Heat dissipation cylinder; 111. Water passage cavity; 112. Water passage groove; 12. First heat dissipation fin; 13. Water inlet pipe; 14. Water outlet pipe; 2. Sealing assembly; 21. Guide rail; 211. First limiting plate; 212. Second limiting plate; 22. Slide plate; 221. Notch; 23. Reset component; 231. Stop block; 232. Guide rod; 233. Spring; 24. Water-blocking ring; 3. Actuating assembly; 31. Actuating ring; 32. Actuating plate; 33. Trigger; 331. First convex ball; 332. Second convex ball; 34. Through rod; 4. Stepper motor; 41. Second heat dissipation fin; 42. Abutment ring. Detailed Implementation

[0056] The following is in conjunction with the appendix Figure 1-12 This application will be described in further detail.

[0057] Example 1:

[0058] This application discloses a motor cooling device in Embodiment 1.

[0059] refer to Figure 1 and Figure 2 The motor cooling device includes a heat dissipation component 1, a sealing component 2, and an actuating component 3. The heat dissipation component 1 is located outside the motor housing, the sealing component 2 is located on the heat dissipation component 1, and the sealing component 2 can be circulated with water to remove the heat from the motor; the actuating component 3 is located on the heat dissipation component 1, and the actuating component 3 can control the intermittent flow of water through the sealing component 2.

[0060] refer to Figure 1 and Figure 2The heat dissipation assembly 1 includes a heat dissipation cylinder 11, which is cylindrical and its shape is adapted to the shape of the motor housing. The heat dissipation cylinder 11 is fitted onto the motor housing. The heat dissipation cylinder 11 has a hollow interior with a water passage cavity 111. One end of the heat dissipation cylinder 11 is connected to a water inlet pipe 13, and the other end of the heat dissipation cylinder 11 is connected to a water outlet pipe 14. The water inlet pipe 13 is connected to the water passage cavity 111, and the gap between the motor housing and the heat dissipation cylinder 11 is connected to the water outlet pipe 14.

[0061] In this embodiment, the water inlet pipe 13 is located at the end of the heat sink 11 near the motor output shaft, and the water outlet pipe 14 is located at the end of the heat sink 11 away from the motor output shaft. In other embodiments of this application, the water inlet pipe 13 may also be located at the end of the heat sink 11 away from the motor output shaft, and the water outlet pipe 14 may be located at the other end of the heat sink 11.

[0062] refer to Figure 3 The heat dissipation assembly 1 also includes first heat dissipation fins 12, which are fixedly connected to the inner wall of the heat dissipation cylinder 11. Multiple first heat dissipation fins 12 are spaced apart along the circumferential inner wall of the heat dissipation cylinder 11, and are arranged along the length of the heat dissipation cylinder 11. The cross-section of the first heat dissipation fins 12 is trapezoidal, that is, the cross-sectional area of ​​the first heat dissipation fins 12 gradually increases from the outside of the heat dissipation cylinder 11 toward the inside of the heat dissipation cylinder 11.

[0063] In this embodiment, the first heat dissipation fin 12 is solid. In other embodiments of this application, the first heat dissipation fin 12 is hollow and communicates with the water passage cavity 111, which can further improve the heat exchange efficiency between the heat dissipation cylinder 11 and the motor housing.

[0064] refer to Figure 4 The inner wall of the heat sink 11 is provided with water channels 112. Multiple water channels 112 are arranged along the length of the heat sink 11. The water channels 112 are connected to the water cavity 111 and are located between adjacent first heat sink fins 12. When water flows through the water cavity 111, the water flows from the water channels 112 into the space between adjacent first heat sink fins 12, thereby carrying away the heat from the motor.

[0065] refer to Figure 5 and Figure 6 The sealing assembly 2 includes a guide rail 21, which includes a first limiting plate 211 and a second limiting plate 212. The first limiting plate 211 is fixedly connected to the inner wall of the water passage cavity 111 and is arranged along the length of the heat dissipation cylinder 11. The second limiting plate 212 is fixedly connected to the first limiting plate 211. The two first limiting plates 211 are spaced apart, and the two second limiting plates 212 are arranged opposite each other, thus forming a set of guide rails 21. In this embodiment, multiple sets of guide rails 21 are arranged along the circumferential wall of the heat dissipation cylinder 11.

[0066] refer to Figure 6 The sealing assembly 2 includes a sliding plate 22, which is slidably disposed within the guide rail 21. Two first limiting plates 211 restrict the horizontal movement of the sliding plate 22, and two second limiting plates 212 restrict the vertical movement of the sliding plate 22, thereby allowing the sliding plate 22 to move along the length of the guide rail 21. The sliding plate 22 has multiple notches 221 spaced apart along its length, the positions of which correspond to the positions of the water channel 112. When the sliding plate 22 slides, it can block or open the water channel 112, thereby controlling the flow of water between the heat sink 11 and the motor housing.

[0067] refer to Figure 7 The sealing assembly 2 also includes a reset component 23, which includes a stop block 231, a spring 233, and a guide rod 232. The stop block 231 is fixedly connected to the inner wall of the water passage cavity 111. One end of the guide rod 232 passes through the slide plate 22, and the other end of the guide rod 232 is fixedly connected to the stop block 231. The spring 233 is sleeved on the guide rod 232, with one end of the spring 233 fixedly connected to the slide plate 22 and the other end of the spring 233 fixedly connected to the stop block 231.

[0068] refer to Figure 8 The sealing assembly 2 also includes a water-blocking ring 24, which is fixedly connected to one end of the heat sink 11 near the motor output shaft. After the heat sink 11 is fitted onto the motor, it can reduce the leakage of water from the side of the heat sink 11 near the motor output shaft.

[0069] refer to Figure 6 and Figure 8 The actuating assembly 3 includes an actuating ring 31, which is disposed at one end of the heat sink 11 near the motor output shaft, and there is a gap between the actuating ring 31 and the end wall of the heat sink 11. The sealing assembly 2 also includes a through rod 34, one end of which is fixedly connected to the slide plate 22, and the other end of which passes through the water baffle ring 24 and is fixedly connected to the actuating ring 31.

[0070] refer to Figure 9 The actuating assembly 3 includes an actuating plate 32, which is sleeved and fixedly connected to the output shaft of the motor, with a gap between the actuating plate 32 and the actuating ring 31. In other embodiments, a flange can be fixedly connected to the motor output shaft, and the actuating plate 32 can be detachably connected to the flange, thereby facilitating the installation and removal of the heat sink 11 and the actuating plate 32.

[0071] refer to Figure 9 and Figure 10The actuating assembly 3 also includes a trigger 33, which includes a first convex ball 331 and a second convex ball 332. The first convex ball 331 is fixedly connected to the side of the actuating ring 31 near the actuating plate 32, and the second convex ball 332 is fixedly connected to the side of the actuating plate 32 near the actuating ring 31. The positions of the first convex ball 331 and the second convex ball 332 are adapted to each other, that is, when the actuating plate 32 rotates, the second convex ball 332 can intermittently actuate the first convex ball 331, so that the actuating ring 31 can move.

[0072] In this embodiment, the spring force of spring 233 should be relatively small so that the trigger 33 can actuate the slide plate 22 with a small force, thereby reducing the impact on motor rotation. In other embodiments of this application, multiple first convex balls 331 and second convex balls 332 can be provided to reduce the time interval of intermittent water flow.

[0073] The implementation principle of the motor heat dissipation device in Embodiment 1 of this application is as follows: When the motor output shaft rotates, the first convex ball 331 can intermittently trigger the second convex ball 332, thereby enabling the slide plate 22 to slide intermittently to open or close the water channel 112. Water flows from the water channel 111 into the space between adjacent first heat dissipation fins 12 to carry away heat, and finally the water flows out from the outlet pipe 14.

[0074] Example 2:

[0075] Embodiment 2 of this application also discloses a stepper motor that applies the device of Embodiment 1.

[0076] refer to Figure 11 and Figure 12 The stepper motor 4 includes second heat dissipation fins 41, which are fixedly connected to the outer wall of the stepper motor 4. Multiple second heat dissipation fins 41 are spaced apart and arranged along the length of the stepper motor 4. The cross-section of the second heat dissipation fins 41 is an inverted trapezoid, meaning that the cross-sectional area of ​​the second heat dissipation fins 41 gradually decreases from the outside of the stepper motor 4 towards the inside. The shape of the second heat dissipation fins 41 matches the shape of the first heat dissipation fins 12, and the first heat dissipation fins 12 and the second heat dissipation fins 41 are alternately arranged.

[0077] refer to Figure 12 The stepper motor 4 also includes an abutment ring 42, which is fixedly connected to the end of the stepper motor 4 away from the output shaft. When the heat sink 11 is fitted onto the housing of the stepper motor 4, the heat sink 11 abuts against the abutment ring 42, and the abutment ring 42 can be fixedly connected to the heat sink 11 by bolts.

[0078] It is worth noting that there is a gap between the second heat dissipation fin 41 and the abutment ring 42, and the water outlet pipe 14 is connected to this gap so that the water flow can converge and be discharged from the water outlet pipe 14.

[0079] The implementation principle of a stepper motor using a motor cooling device in Embodiment 2 of this application is as follows: when water flows from the water channel 112 into the space between the adjacent first cooling fin 12 and the second cooling fin 41, it can carry away the heat of the stepper motor 4, and the water flow eventually gathers and is discharged from the outlet pipe 14.

[0080] 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 motor cooling device, characterized in that: include: The heat dissipation assembly (1) includes a heat dissipation cylinder (11) for being fitted onto the outside of the motor; the heat dissipation cylinder (11) has a water passage cavity (111) and a water passage groove (112) on its inner wall; the heat dissipation assembly (1) also includes an inlet pipe (13) and an outlet pipe (14), the inlet pipe (13) being connected to the water passage cavity (111) and the outlet pipe (14) passing through the heat dissipation cylinder (11). The sealing assembly (2) includes a sliding plate (22) slidably disposed in the water passage cavity (111), the sliding plate (22) being used to open or close the water passage groove (112). A toggle assembly (3) includes a toggle ring (31) disposed outside the heat sink (11), and the slide plate (22) is connected to the toggle ring (31). The toggle ring (31) is used to move the slide plate (22). The toggle assembly (3) also includes: A toggle plate (32) is used to be sleeved on the motor output shaft; A trigger (33) is disposed between the toggle ring (31) and the toggle plate (32), and the toggle plate (32) moves the toggle ring (31) through the trigger (33); The trigger (33) includes: The first convex ball (331) is disposed on the side of the actuating ring (31) near the actuating plate (32); The second convex ball (332) is disposed on the side of the toggle plate (32) near the toggle ring (31), and the position of the second convex ball (332) corresponds to that of the first convex ball (331).

2. The motor cooling device according to claim 1, characterized in that: The slide plate (22) is arranged along the length direction of the heat sink (11), and the slide plate (22) has multiple notches (221) along its length direction; the water channel (112) has multiple notches, and the multiple notches (221) correspond to the positions of the multiple water channels (112).

3. The motor cooling device according to claim 1, characterized in that: The sealing assembly (2) further includes: The guide rail (21) is disposed on the inner wall of the water passage cavity (111), and the slide plate (22) is slidably disposed on the guide rail (21); The reset member (23) is disposed in the water passage cavity (111) and the reset member (23) resets the slide plate (22).

4. The motor cooling device according to claim 3, characterized in that: The reset component (23) includes: A baffle (231) is disposed on the inner wall of the water passage cavity (111); A guide rod (232) is provided, one end of which is inserted through the slide plate (22), and the other end of which is connected to the stop block (231); Spring (233), which is sleeved on the guide rod (232).

5. The motor cooling device according to claim 1, characterized in that: The heat dissipation assembly (1) includes a first heat dissipation fin (12), which is disposed on the inner wall of the heat dissipation cylinder (11).

6. The motor cooling device according to claim 5, characterized in that: The first heat dissipation fin (12) is hollow and is connected to the water passage cavity (111).

7. A stepper motor, using the motor cooling device as described in any one of claims 1-6, characterized in that: It includes a second heat dissipation fin (41), which is used to connect to the motor housing; the second heat dissipation fin (41) cooperates with the first heat dissipation fin (12), and the second heat dissipation fin (41) and the first heat dissipation fin (12) are alternately arranged.

8. A stepper motor according to claim 7, characterized in that: From the outside of the heat sink (11) toward the inside of the heat sink (11), the cross-sectional area of ​​the first heat sink fin (12) gradually increases, and the cross-sectional area of ​​the second heat sink fin (41) gradually decreases.

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