Heat dissipation structure of magnetic powder clutch

Abstract

The utility model provides a heat dissipation structure of a magnetic powder clutch, and belongs to the technical field of clutches. The heat dissipation structure of the magnetic powder clutch comprises a magnetic powder clutch body, a fan cover is installed on the magnetic powder clutch body, a fan is arranged in the fan cover, the fan is rotationally connected with a shell of the magnetic powder clutch body, a coil is arranged on the shell of the magnetic powder clutch body and is in linkage with the magnetic powder clutch body, and the magnetic powder clutch body is arranged on the coil. A friction plate is arranged on an input shaft of the magnetic powder clutch body. The magnetic powder clutch has the advantages that the coil attracts the friction plate to enable the input shaft of the magnetic powder clutch body to be connected with the fan, the magnetic powder clutch body directly drives the fan to conduct air blowing and heat dissipation, and therefore the structure is simplified, the air volume can be guaranteed, and the service life is prolonged. When the magnetic powder clutch body is separated, the delay circuit is triggered to delay the disconnection of the shaft connection with the fan, so that the fan can continuously dissipate heat of the magnetic powder clutch body, the heat dissipation of the magnetic powder clutch body is ensured, and the energy consumption is also reduced.

Description

Technical Field

[0001] This application relates to the technical field of clutches, and more particularly, to a heat dissipation structure for a magnetic powder clutch. Background Art

[0002] During the use of a magnetic powder clutch, heat is generated. If this heat cannot be dissipated in time, high temperatures will occur, which will have a demagnetizing effect and weaken the magnetism of the magnetic powder.

[0003] In this regard, Chinese Patent Application No. CN202221777081.2 discloses a heat dissipation device for a magnetic powder clutch. This solution mainly forms an air flow in the housing through an extrusion block, and uses two one-way valves to allow external air flow to enter from one side and then flow out from the other side, thereby taking away heat and achieving the effect of heat dissipation.

[0004] However, during the process of implementing the technical solution in the embodiments of this application, the inventors found that the above technology has at least the following technical problems:

[0005] The extrusion block is driven by an independent motor and reciprocates through multiple movable structures, resulting in high costs and small air flow. Summary of the Utility Model

[0006] To make up for the above deficiencies, this application provides a heat dissipation structure for a magnetic powder clutch, aiming to improve the problems mentioned in the above background art.

[0007] An embodiment of this application provides a heat dissipation structure for a magnetic powder clutch, including a magnetic powder clutch body. A wind cover is installed on the magnetic powder clutch body. A fan is arranged inside the wind cover. The fan is rotatably connected to the outer shell of the magnetic powder clutch body. A coil is arranged on the outer shell of the magnetic powder clutch body and is linked with the magnetic powder clutch body. A friction plate is arranged on the input shaft of the magnetic powder clutch body. The friction plate is magnetically attracted to the coil. The friction plate is movably attached to the fan. A delay circuit is arranged on the coil.

[0008] In a specific implementation, the wind cover includes a rear cover and a middle cover. The rear cover and the middle cover are bolted together. An air outlet is provided at the center of the rear cover.

[0009] During the above implementation process, the fan sucks air from one end of the middle cover. The air flow passes between the outer shell of the magnetic powder clutch body and the middle cover, and then flows out from the air outlet at the center of the middle cover, so as to be able to fit the surface of the outer shell of the magnetic powder clutch body as much as possible and improve the heat dissipation effect.

[0010] In a specific implementation, the rear cover and the middle cover are clamped on the base of the magnetic powder clutch body.

[0011] In the above implementation process, the middle cover and the rear cover are combined on the powder magnetic clutch body and then fixed to the powder magnetic clutch body by bolt connection, which can also reduce the gap between them and the powder magnetic clutch body to ensure the air flow channel.

[0012] In a specific implementation, a shock pad is provided between the middle cover and the housing of the powder magnetic clutch body.

[0013] In the above implementation process, the shock pad is used to maintain the interval between the powder magnetic clutch body and the middle cover to ensure the air flow channel and can also reduce the vibration of the wind cover.

[0014] In a specific implementation, a protective net is flange-connected to the front end of the middle cover.

[0015] In the above implementation process, the protective net is used to protect the fan.

[0016] In a specific implementation, the friction plate includes an inner ring and an outer ring. The inner ring is installed on the input shaft of the powder magnetic clutch body. A shrapnel is provided between the inner ring and the outer ring. The outer ring is movably fitted to the end face of the fan, and the outer ring is magnetically attracted and connected to the coil.

[0017] In the above implementation process, the friction plate is fixed to the input shaft of the powder magnetic clutch body through the inner ring. When the coil is energized, it attracts the outer ring to move inward and fit to the end face of the fan, so that the fan is shaft-connected to the input shaft of the powder magnetic clutch body. In this embodiment, a wear-resistant plate is attached to the end face of the fan and fits and rubs against the friction plate.

[0018] In a specific implementation, the inner ring is pin-key connected to the input shaft of the powder magnetic clutch body, and a setscrew is screwed on the inner ring, and the setscrew abuts against the input shaft of the powder magnetic clutch body.

[0019] In the above implementation process, the inner ring is pin-connected to the input shaft of the powder magnetic clutch body to form circumferential fixation, and then the setscrew is abutted against the input shaft to form axial fixation, thereby fixing the friction plate to the input shaft.

[0020] In a specific implementation, heat dissipation fins are provided on the housing of the powder magnetic clutch body.

[0021] In the above implementation process, the air flow flows along the surface of the housing of the powder magnetic clutch body, and the heat dissipation area is increased through the heat dissipation fins to improve the heat dissipation effect.

[0022] Compared with the prior art, the beneficial effects of the present application are as follows: The coil is used to attract the friction plate to connect the input shaft of the magnetic powder clutch body with the fan hub. The magnetic powder clutch body is used to directly drive the fan for blowing and heat dissipation, thereby simplifying the structure and ensuring the air volume. When the magnetic powder clutch body is separated, the delay circuit is triggered to delay the disconnection of the shaft connection with the fan, so that the fan can continue to dissipate heat from the magnetic powder clutch body, thus ensuring the heat dissipation of the magnetic powder clutch body and reducing the energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 is a schematic diagram of the magnetic powder clutch heat dissipation structure provided by the embodiment of the present application;

[0025] Figure 2 is a schematic diagram of the connection relationship between the air hood and the magnetic powder clutch body provided by the embodiment of the present application;

[0026] Figure 3 is a schematic diagram of the connection relationship between the fan and the magnetic powder clutch body provided by the embodiment of the present application;

[0027] Figure 4 is a schematic diagram of the connection relationship between the friction plate and the magnetic powder clutch body provided by the embodiment of the present application.

[0028] In the figure: 10 - magnetic powder clutch body; 20 - air hood; 21 - rear hood; 22 - middle hood; 23 - shock pad; 24 - protective net; 30 - fan; 40 - coil; 50 - friction plate; 51 - inner ring; 52 - outer ring; 53 - elastic piece; 54 - setscrew; 60 - heat sink. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

[0030] Please refer to Figures 1-4, this application provides a heat dissipation structure for a magnetic powder clutch, which includes a magnetic powder clutch body 10. A wind cover 20 is installed on the magnetic powder clutch body 10. A fan 30 is arranged inside the wind cover 20. The fan 30 is rotationally connected to the outer shell of the magnetic powder clutch body 10. A coil 40 is arranged on the outer shell of the magnetic powder clutch body 10 and is linked with the magnetic powder clutch body 10. A friction plate 50 is arranged on the input shaft of the magnetic powder clutch body 10. The friction plate 50 is magnetically attracted and connected to the coil 40. The friction plate 50 is movably attached to the fan 30. A delay circuit is arranged on the coil 40. Among them, the friction plate 50 is attracted by the coil 40 to connect the input shaft of the magnetic powder clutch body 10 and the fan 30. The magnetic powder clutch body 10 directly drives the fan 30 to blow air for heat dissipation, thus simplifying the structure and ensuring the air volume. When the magnetic powder clutch body 10 is separated, the delay circuit is triggered to delay the disconnection of the shaft connection with the fan 30, so that the fan 30 can continue to dissipate heat from the magnetic powder clutch body 10, thus ensuring the heat dissipation of the magnetic powder clutch body 10 and reducing the energy consumption.

[0031] Please refer to Figures 1-4 , the wind cover 20 includes a rear cover 21 and a middle cover 22. The rear cover 21 and the middle cover 22 are bolted together. A ventilation opening is provided at the center of the rear cover 21. The fan 30 sucks air from one end of the middle cover 22. The air flow passes through the space between the outer shell of the magnetic powder clutch body 10 and the middle cover 22, and then flows out from the ventilation opening at the center of the middle cover 22, so as to be able to fit the surface of the outer shell of the magnetic powder clutch body 10 as much as possible and improve the heat dissipation effect.

[0032] Please refer to Figures 1-4 , the rear cover 21 and the middle cover 22 are clamped on the base of the magnetic powder clutch body 10. The middle cover 22 and the rear cover 21 are combined on the magnetic powder clutch body 10 and then bolted together, so as to be fixed on the magnetic powder clutch body 10, and the gap with the magnetic powder clutch body 10 can also be reduced to ensure the air flow channel.

[0033] Please refer to Figures 1-4 , a shock pad 23 is arranged between the middle cover 22 and the outer shell of the magnetic powder clutch body 10. The shock pad 23 is used to maintain the interval between the magnetic powder clutch body 10 and the middle cover 22, ensure the air flow channel, and can also reduce the vibration of the wind cover 20.

[0034] Please refer to Figures 1-4 , a protective net 24 is flange-connected to the front end of the middle cover 22. The protective net 24 is used to protect the fan 30.

[0035] Please refer to Figures 1-4, the friction plate 50 includes an inner ring 51 and an outer ring 52. The inner ring 51 is installed on the input shaft of the powder magnetic clutch body 10. A spring plate 53 is arranged between the inner ring 51 and the outer ring 52. The outer ring 52 is movably attached to the end face of the fan 30, and the outer ring 52 is magnetically attracted and connected to the coil 40. The friction plate 50 is fixed to the input shaft of the powder magnetic clutch body 10 through the inner ring 51. When the coil 40 is energized, it attracts the outer ring 52 to move inward and attach to the end face of the fan 30, so that the fan 30 is axially connected to the input shaft of the powder magnetic clutch body 10. In this embodiment, a wear-resistant plate is attached to the end face of the fan 30 and fits and rubs against the friction plate 50.

[0036] Please refer to Figures 1-4 , the inner ring 51 is connected to the input shaft of the powder magnetic clutch body 10 by a pin and key. A setscrew 54 is screwed on the inner ring 51, and the setscrew 54 abuts against the input shaft of the powder magnetic clutch body 10. The inner ring 51 is pin-connected to the input shaft of the powder magnetic clutch body 10 to form circumferential fixation, and then the setscrew 54 is abutted against the input shaft to form axial fixation, thereby fixing the friction plate 50 to the input shaft.

[0037] Please refer to Figures 1-4 , heat dissipation fins 60 are provided on the outer shell of the powder magnetic clutch body 10. The air flow flows along the surface of the outer shell of the powder magnetic clutch body 10, and the heat dissipation area is increased through the heat dissipation fins 60 to improve the heat dissipation effect.

[0038] The working principle of the heat dissipation structure of this magnetic powder clutch is as follows: When the input shaft and the output shaft of the magnetic powder clutch body 10 are connected, the heat generation of the magnetic powder clutch body 10 increases. When the control circuit of the magnetic powder clutch body 10 triggers the closure of the magnetic powder clutch body 10, it also simultaneously triggers the coil 40 to be energized, thereby triggering the fan 30 to rotate. The air flow is sucked in from the protective net 24 and flows between the housing of the magnetic powder clutch body 10 and the wind cover 20, and then is discharged from the air outlet at the center of the rear cover 21, achieving a heat dissipation effect. Since the magnetic powder will continue to be disturbed and rubbed for a period of time after the magnetic powder clutch body 10 is separated, resulting in continuous heat generation for a period of time, when the control circuit of the magnetic powder clutch body 10 controls the separation of the magnetic powder clutch body 10, it simultaneously triggers the delay circuit to work. The coil 40 continues to operate for a period of time within the delayed time period and then stops, so that the fan 30 continues to dissipate heat after the magnetic powder clutch body 10 is separated, thereby helping the magnetic powder clutch body 10 to reduce the temperature as soon as possible. Compared with the prior art where the fan 30 is fixedly connected to the input shaft, resulting in continuous rotation of the fan 30 and energy consumption, there will be an energy-saving effect. In summary, the coil 40 is used to attract the friction plate 50 to connect the input shaft of the magnetic powder clutch body 10 and the fan 30 to rotate, and the magnetic powder clutch body 10 directly drives the fan 30 to blow and dissipate heat, thereby simplifying the structure and ensuring the air volume. When the magnetic powder clutch body 10 is separated, the delay circuit is triggered to delay the disconnection of the shaft connection with the fan 30, so that the fan 30 can continue to dissipate heat from the magnetic powder clutch body 10, thereby ensuring the heat dissipation of the magnetic powder clutch body 10 and reducing the energy consumption.

[0039] The above are only the embodiments of the present application and are not used to limit the protection scope of the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, improvement, or equivalent replacement made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

Claims

1. A magnetic powder clutch heat dissipation structure, characterized in that: The invention comprises a magnetic powder clutch body (10), a wind cover (20) is installed on the magnetic powder clutch body (10), a fan (30) is arranged in the wind cover (20), the fan (30) is rotatably connected with the outer shell of the magnetic powder clutch body (10), a coil (40) is arranged on the outer shell of the magnetic powder clutch body (10) and is linked with the magnetic powder clutch body (10), a friction plate (50) is arranged on the input shaft of the magnetic powder clutch body (10), the friction plate (50) is magnetically connected with the coil (40), the friction plate (50) is movably fitted with the fan (30), and a delay circuit is arranged on the coil (40).

2. A magnetic powder clutch heat dissipation structure according to claim 1, characterized in that: The wind cover (20) comprises a rear cover (21) and a middle cover (22), wherein the rear cover (21) and the middle cover (22) are connected by bolts, and an air outlet is provided at the center of the rear cover (21).

3. A magnetic powder clutch heat dissipation structure according to claim 2, characterized in that: The rear cover (21) and the middle cover (22) are clamped on the base of the magnetic powder clutch body (10).

4. A magnetic powder clutch heat dissipation structure according to claim 3, characterized in that: A shock-absorbing pad (23) is provided between the middle cover (22) and the outer shell of the magnetic powder clutch body (10).

5. A magnetic powder clutch heat dissipation structure according to claim 4, characterized in that: The front end flange of the middle cover (22) is connected to a protection net (24).

6. A magnetic powder clutch heat dissipation structure according to claim 5, characterized in that: The friction plate (50) comprises an inner ring (51) and an outer ring (52); the inner ring (51) is mounted on the input shaft of the magnetic powder clutch body (10); a spring sheet (53) is provided between the inner ring (51) and the outer ring (52); the outer ring (52) is movably fitted with the end surface of the fan (30); and the outer ring (52) is magnetically connected to the coil (40).

7. A magnetic powder clutch heat dissipation structure according to claim 6, characterized in that: The inner ring (51) is key-connected to the input shaft of the magnetic powder clutch body (10); a top screw (54) is threaded onto the inner ring (51); and the top screw (54) is pressed against the input shaft of the magnetic powder clutch body (10).

8. A magnetic powder clutch heat dissipation structure according to claim 7, characterized in that: A heat sink (60) is provided on the outer shell of the magnetic powder clutch body (10).

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