Fan brake structure

Abstract

The present application provides a fan brake structure, which comprises a fan, a brake structure, and a elastic component. The fan has a frame and a fan wheel. The frame vertically sets an axle cylinder. The fan wheel vertically sets an axle and is pivoted in the axle cylinder. The free end of the axle has a split groove. The brake structure is set at the bottom of the axle cylinder and has a brake plate and an electromagnet. One end of the brake plate protrudes a brake pin. The other end of the brake plate sets a magnetic element. The elastic component is abutted between the brake plate and the electromagnet. When the fan is powered off, the electromagnet is powered to generate a magnetic pole and the magnetic element generates a repulsive force. The brake plate is moved to the direction of the axle. The brake pin enters the split groove to generate resistance brake. The fan achieves the function of reducing the inertia running time to achieve the fan brake.

Description

TECHNICAL FIELD

[0001] The present application relates to a fan brake structure, in particular to a fan brake structure with repeated brake action and high sharing. BACKGROUND

[0002] Many products generate heat energy when in use. The heat energy accumulated in the products can affect the operation of the products, and can cause the products to operate poorly and decrease efficiency. Therefore, it is necessary to install a heat dissipation device in the products. Generally, a fan is used as the heat dissipation device. When the temperature in the product reaches a set high temperature, the fan is started to discharge hot air to reduce the overall internal temperature of the product. When the internal temperature of the product decreases to a set low temperature, the fan is stopped to reduce energy consumption. However, even if the fan is powered off, the original rotating speed of the fan can make the fan run for a period of time before it completely stops.

[0003] Therefore, in order to reduce the duration of the inertial operation of the fan after the fan is powered off, a fan brake is developed. The existing fan brake has the following forms: in the first form, when the fan is to be braked, a software control logic circuit is used to make the fan become a normally open state. The magnetic field generated by the rotating fan blades resists the magnetic field of the magnetic tape to generate resistance, so that the fan reduces the duration of the inertial operation after the fan is powered off. In the second form, when the fan is to be braked, after the fan is powered off, the electromotive force generated by the inertial operation of the fan blades is conducted to a hardware brake circuit to drive a logic circuit to make the fan become a normally open state. The magnetic field generated by the rotating fan blades resists the magnetic field of the magnetic tape to generate resistance, so that the fan reduces the duration of the inertial operation after the fan is powered off.

[0004] Therefore, the existing fan brake technology must use an additional software control logic circuit or design a hardware brake circuit to drive a logic circuit to make the magnetic field generated by the rotating fan blades resist the magnetic field of the magnetic tape to generate resistance, so that the fan reduces the duration of the inertial operation after the fan is powered off, and then achieves the fan brake effect. However, if the general fan is to be equipped with a fan brake, an additional brake circuit is needed to achieve the brake effect. The printed circuit board is already densely printed with various lines, so that the brake circuit or the driving logic circuit cannot be installed on the original designed circuit board, and the manufacturer must redesign the circuit board to add this function, so that the sharing of the fan brake is poor. SUMMARY

[0005] The main purpose of the present application is to provide a fan brake structure that can achieve sharing.

[0006] To achieve the above purpose, the technical solution adopted by the present application is:

[0007] A fan brake structure, characterized in that it comprises:

[0008] A fan, having a frame, a fan wheel and a stator, the frame vertically has a shaft cylinder, the stator is sleeved with the outside of the shaft cylinder and corresponds to the fan wheel, the fan wheel vertically has a shaft, one end of the shaft is pivoted in the shaft cylinder, the other end of the shaft has a free end, and the free end has a section groove;

[0009] A brake structure, having a recharge module and a shell, the brake structure is arranged at the bottom of the shaft cylinder, the shell of the brake structure has a brake plate and an electromagnet, one end of the brake plate protrudes a brake pin, the other end of the brake plate is provided with a magnetic piece, the recharge module has an electrical connection part and a power storage component, and the electrical connection part is electrically connected with the fan;

[0010] An elastic component, abutting between the brake plate and the electromagnet.

[0011] The fan brake structure, wherein: the brake pin of the brake structure and the section groove of the fan correspond to each other in concave-convex matching, the power storage component of the recharge module of the brake structure is a capacitor, a battery or a storage battery, and the elastic component is a compression spring or a conical spring.

[0012] The fan brake structure, wherein: the shape of the brake plate and the shape of the internal space of the shell are non-circular, avoiding the brake plate from rotating radially when moving axially in the shell.

[0013] The fan brake structure, wherein: one side of the fan is provided with a plurality of static blades, one end of the plurality of static blades is connected with the frame, and the other end is connected with the shaft cylinder.

[0014] The fan brake structure, wherein: the magnetic piece is a permanent magnet.

[0015] A fan brake structure, characterized in that it comprises:

[0016] A fan, having a frame, a fan wheel and a stator, the frame vertically has a shaft cylinder, the stator is sleeved with the outside of the shaft cylinder and corresponds to the fan wheel, the fan wheel vertically has a shaft, one end of the shaft is pivoted in the shaft cylinder, the other end of the shaft has a free end, and the free end has a section groove;

[0017] A brake structure, having a recharge module and a shell, the brake structure is arranged at the bottom of the shaft cylinder, the shell of the brake structure has a brake plate and an electromagnet, one end of the brake plate protrudes a brake pin, the other end of the brake plate is provided with a magnetic piece, the recharge module has an electrical connection part and a power storage component, and the electrical connection part is electrically connected with the fan;

[0018] An elastic component, abutting between the brake plate and the electromagnet.

[0019] The fan brake structure, wherein: the brake pin of the brake structure and the profile groove of the fan correspond to each other in concave-convex matching, the storage assembly of the recharge module of the brake structure is a capacitor or a storage battery or a storage battery, and the elastic element is a compression spring or a conical spring.

[0020] The fan brake structure, wherein: the shape of the brake plate and the internal space of the shell part is non-circular, avoiding the radial rotation of the brake plate when moving axially in the shell part.

[0021] The fan brake structure, wherein: one side of the fan is provided with a plurality of vanes, one end of the plurality of vanes is connected to the frame body, and the other end is connected to the shaft cylinder.

[0022] The fan brake structure, wherein: the magnetic member is a permanent magnet.

[0023] When the general state and the electromagnet is in an unpowered state, the magnetic member on one side of the brake plate will attract the brake plate and the electromagnet, so that the elastic assembly in the middle is compressed. Since the magnetic force of the magnetic member and the electromagnet is greater than the elastic force of the elastic assembly, the brake plate and the brake pin on the other side of the brake plate are away from the profile groove at the bottom of the shaft, so that the fan can rotate smoothly.

[0024] When the fan fails, the recharge module recharges electricity to the electromagnet, so that the electromagnet is powered to generate a magnetic pole, thereby generating a reverse magnetic force. The reverse magnetic force changes the magnetic member originally attracted to the electromagnet from simple attraction to repulsion of the same pole, and at the same time, the brake plate of the magnetic member is repelled in the direction of the shaft by the elastic force of the elastic assembly and the elastic force released through the elastic assembly. Since the brake pin is provided on the brake plate and corresponds to the profile groove at the free end of the shaft, when the brake plate moves in the direction of the shaft, the brake pin on the brake plate will directly enter the profile groove at the free end of the shaft to engage the fan, so that the fan reduces the inertia running time after power failure to achieve the fan brake effect. The present application can be applied to general fans, and only the profile groove at the free end of the shaft of the general fan is needed to install the brake structure of the present application, so as to achieve the advantage of sharing the fan brake of the existing fan. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The cross-sectional schematic view of the first embodiment of the present application.

[0026] Figure 2 The partial cross-sectional schematic view of the fan normal running mode of the first embodiment of the present application.

[0027] Figure 3 The partial cross-sectional schematic view of the brake pin actuation of the first embodiment of the present application.

[0028] Figure 4A cross-sectional view of the second embodiment of the present application.

[0029] Figure 5 A cross-sectional view of the second embodiment of the present application.

[0030] Figure 6 A cross-sectional view of the second embodiment of the present application.

[0031] Figure 7 A cross-sectional view of the second embodiment of the present application.

[0032] Reference signs: fan 1; frame 2; shaft cylinder 21; static blade 22; fan wheel 3; shaft 31; cross-sectional groove 311; stator 4; brake structure 5; shell 50; brake plate 51; brake pin 511; magnetic member 512; electromagnet 52; recharge module 53; electrical connection 531; power storage assembly 532; elastic assembly 6. DETAILED DESCRIPTION

[0033] The above objects of the present application and the characteristics in structure and function will be described with reference to the preferred embodiments of the present application shown in the accompanying drawings.

[0034] Please refer to Figures 1 to 7 A cross-sectional view of the second embodiment of the present application.

[0035] Please refer to Figure 1 A cross-sectional view of the second embodiment of the present application.

[0036] The fan 1 is provided with a frame 2, a fan wheel 3, and a stator 4. The frame 2 is provided with a shaft cylinder 21. The stator 4 is provided outside the shaft cylinder 21 and corresponds to the fan wheel 3. The fan wheel 3 is provided with a shaft 31. One end of the shaft 31 is pivoted in the shaft cylinder 21. The other end of the shaft 31 is provided with a free end. The free end is provided with a cross-sectional groove 311.

[0037] Preferably, the frame 2 is provided with a plurality of static blades 22. One end of each static blade 22 is connected to the frame 2. The other end of each static blade 22 is connected to the shaft cylinder 21.

[0038] Referring to Figure 7 The brake structure 5 has a recharge module 53 and a housing 50, and is arranged at the bottom of the shaft cylinder 21. The housing 50 of the brake structure 5 is provided with a brake plate 51 and an electromagnet 52. One end of the brake plate 51 protrudes a brake pin 511, and the other end of the brake plate 51 is provided with a magnetic element 512. The brake pin 511 corresponds to the position of the cross groove 311 of the free end of the shaft 31. The recharge module 53 has an electrical connection part 531 and an electricity storage component 532. The electrical connection part 531 is electrically connected to the fan 1.

[0039] The elastic component 6 is in abutment between the brake plate 51 and the electromagnet 52.

[0040] Preferably, the brake pin 511 and the cross groove 311 are a convex-concave corresponding fit, and can also be reversely arranged and are not limited.

[0041] Preferably, the brake pin 511 and the cross groove 311 are geometrically corresponding clamping (such as the brake pin 511 is rectangular, polygonal, triangular, and the corresponding cross groove is the same shape).

[0042] Preferably, the elastic component 6 is a compression spring or a conical spring.

[0043] Preferably, the magnetic element 512 is a permanent magnet.

[0044] Preferably, the internal space shape of the housing 50 of the brake structure 5 and the outer shape of the brake plate 51 are non-circular and correspondingly arranged (such as the brake plate 51 is rectangular, polygonal, triangular, and the internal space of the housing 50 of the brake structure 5 is the same shape), so as to avoid the brake plate 51 from rotating radially when moving axially in the housing 50.

[0045] The electrical connection part 531 can be a pin socket, a flat cable, a wire, or an electrical contact, and the electricity storage component 532 can be a capacitor, a battery, or a storage battery, which serves as a component for storing and releasing electricity. Therefore, when the fan 1 is normally powered and operates, the electricity storage component 532 stores electricity through the electrical connection part 531 and the fan 1, and releases the stored electricity to the electromagnet 52 when power is cut off.

[0046] Referring to Figure 2 When the fan 1 is in a normal operating state, the electromagnet 52 is in an unpowered state. Figure 1 , Figure 2The dashed line word on the electromagnet 52 is the magnetic pole after energization, the magnetic part 512 on one side of the brake plate 51 will attract the brake plate 51 and the electromagnet 52, so that the elastic component 6 between the brake plate 51 and the electromagnet 52 is compressed, and because the magnetic force of the magnetic part 512 is greater than the elastic force of the elastic component 6, the brake plate 51 and the brake pin 511 on the other side of the brake plate 51 are away from the cross groove 311 of the free end of the shaft 31, so that the fan 1 can rotate smoothly.

[0047] Please refer to Figure 3 When the fan 1 fails, the charging module 53 charges electricity to the electromagnet 52 (such as the instantaneous power supply of the power storage component 532), so that the electromagnet 52 is instantaneously energized to generate a magnetic pole. The electromagnet 52 generates an instantaneous reverse magnetic force, which changes the magnetic part 512 originally attracted to the electromagnet 52 from simple attraction to repulsion of the same pole, and at the same time, the elastic component 6 is elastically released to make the brake plate 51 of the magnetic part 512 advance in the direction of the shaft 31. Because the brake plate 51 is provided with the brake pin 511 and corresponds to the cross groove 311 of the free end of the shaft 31, when the brake plate 51 moves in the direction of the shaft 31, the brake pin 511 on the brake plate 51 will directly enter the cross groove 311 of the free end of the shaft 31 to engage the fan 1, so that the fan 1 reduces or avoids the inertia running time after power off to achieve the fan brake function. The present application is used when the fan 1 fails to avoid the failed fan 1 from being disturbed by the surrounding airflow to rotate, so as to avoid the rotation of the failed fan 1 to make the airflow turbulent. Therefore, the present application is a one-time trigger use, and the present application can be applied to general fans, and only the cross groove of the free end of the shaft of the general fan is needed to install the brake structure 5 of the present application, so as to achieve the advantage of sharing the fan brake for existing fans.

[0048] Please refer to Figure 4 It is a cross-sectional schematic view of the second embodiment of the present application, as shown in the figure, the partial structure of the present embodiment is the same as the first embodiment described above, so it will not be repeated here, and the difference between the present embodiment and the first embodiment described above is that the elastic component 6 is in contact between the top end of the shell 50 and the brake plate 51.

[0049] Please refer to Figure 5 , Figure 6 When the fan 1 is running, the electromagnet 52 is in an unenergized state Figure 4 , Figure 5 The dashed line word on the electromagnet 52 is the magnetic pole after energization, the magnetic part 512 on the other side of the brake plate 51 will attract the brake plate 51 and the electromagnet 52, so that the elastic component 6 between the brake plate 51 and the electromagnet 52 is compressed, and because the magnetic force of the magnetic part 512 is greater than the elastic force of the elastic component 6, the brake plate 51 and the brake pin 511 on the other side of the brake plate 51 are away from the cross groove 311 of the free end of the shaft 31, so that the fan 1 can rotate smoothly.

[0050] When the fan 1 is powered off or does not receive a control signal, the power storage assembly 532 stably supplies power to the electromagnet 52, so that the electromagnet 52 is stably powered to generate a magnetic pole. The electromagnet 52 generates a stable reverse magnetic force, which repels the magnetic piece 512 on one side of the brake plate 51. Thus, the brake plate 51 moves towards the shaft 31 due to the repulsive force between the magnetic piece 512 and the electromagnet 52 being greater than the elastic force of the elastic assembly 6. Since the other side of the brake plate 51 is provided with a brake pin 511 and corresponds to the profile groove 311 of the free end of the shaft 31, when the brake plate 51 moves towards the shaft 31, the brake pin 511 on the brake plate 51 enters the profile groove 311 of the free end of the shaft 31 to be clamped to generate resistance. Thus, the fan 1 is powered off to reduce or completely avoid the inertia running time to achieve the fan braking effect. The brake structure 5 of the present application can be applied to general fans, and only needs to be installed on the free end of the shaft of a general fan to form a profile groove. Thus, the brake structure 5 of the present application can be shared with existing fans to achieve the advantage of sharing. Since the electromagnet 52 generates a magnetic pole through stable power supply, the repulsive force can be eliminated or temporarily eliminated by interrupting the power supply of the electromagnet 52 or temporarily interrupting the power supply of the electromagnet 52. Thus, the elastic force of the elastic assembly 6 can push the brake plate 51 away from the shaft 31, so that the brake plate 51 can achieve flexible braking.

Claims

1. A fan brake structure, characterized by comprising: It comprises: a fan with a frame, a fan wheel and a stator, the frame vertically sets an axle cylinder, the stator is sleeved with the outside of the axle cylinder and corresponds with the fan wheel, the fan wheel vertically sets an axle core, one end of the axle core is pivoted in the axle cylinder, the other end of the axle core has a free end, the free end has a section groove; a brake structure with a recharge module and a shell, the brake structure is set at the bottom of the axle cylinder, the shell of the brake structure has a brake plate and an electromagnet inside, one end of the brake plate protrudes a brake pin, the other end of the brake plate is provided with a magnetic piece, the recharge module has an electrical connection part and a power storage component, and the electrical connection part is electrically connected with the fan; a spring component is abutted between the brake plate and the electromagnet.

2. The fan brake structure of claim 1, wherein: The brake pin of the brake structure and the section groove of the fan correspond with each other in concave-convex matching, the power storage component of the recharge module of the brake structure is a capacitor, a storage battery or a battery, and the spring component is a compression spring.

3. The fan brake structure of claim 2, wherein: The compression spring is a conical spring.

4. The fan brake structure of claim 1, wherein: The shape of the brake plate and the internal space of the shell is non-circular, which avoids radial rotation of the brake plate when moving axially in the shell.

5. The fan brake structure of claim 1, wherein: One side of the fan is provided with a plurality of vanes, one end of the plurality of vanes is connected with the frame, and the other end is connected with the axle cylinder.

6. The fan brake structure of claim 1, wherein: The magnetic piece is a permanent magnet.

7. A fan brake structure, characterized by comprising: It comprises: a fan with a frame, a fan wheel and a stator, the frame vertically sets an axle cylinder, the stator is sleeved with the outside of the axle cylinder and corresponds with the fan wheel, the fan wheel vertically sets an axle core, one end of the axle core is pivoted in the axle cylinder, the other end of the axle core has a free end, the free end has a section groove; a brake structure with a recharge module and a shell, the brake structure is set at the bottom of the axle cylinder, the shell of the brake structure has a brake plate and an electromagnet inside, one end of the brake plate protrudes a brake pin, the other end of the brake plate is provided with a magnetic piece, the recharge module has an electrical connection part and a power storage component, and the electrical connection part is electrically connected with the fan; a spring component is abutted between the brake plate and the electromagnet.

8. The fan brake structure of claim 7, wherein: The brake pin of the brake structure and the section groove of the fan correspond with each other in concave-convex matching, the power storage component of the recharge module of the brake structure is a capacitor, a storage battery or a battery, and the spring component is a compression spring.

9. The fan brake structure of claim 8, wherein: The compression spring is a conical spring.

10. The fan brake structure of claim 7, wherein: The shape of the brake plate and the internal space of the shell is non-circular, which avoids radial rotation of the brake plate when moving axially in the shell.

11. The fan brake structure of claim 7, wherein: One side of the fan is provided with a plurality of vanes, one end of the plurality of vanes is connected with the frame, and the other end is connected with the axle cylinder.

12. The fan brake structure of claim 7, wherein: The magnetic piece is a permanent magnet.

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