TWM634605U - Fan brake structure - Google Patents

Abstract

A fan brake structure, comprising: a fan, a brake device; the fan has a frame, a fan wheel and a stator, the frame is vertically provided with a shaft, and the fan wheel system is vertically provided with an axis pivoted on the aforementioned shaft Inside the cylinder, the stator is sleeved on the outside of the shaft cylinder and corresponds to the fan wheel. One end of the shaft center has a first restricting part; the braking device is located at the bottom of the shaft cylinder and has a driving part and a braking part. And an elastic part, the elastic part supports one end of the brake part, the other end of the brake part has a convex body, the driving part has a spiral track, and the convex body corresponds to the spiral track when the driving part rotates. Move, so that the braking member can carry out the linear reciprocating motion of lifting the first limiting part of the axis to lock the brake or falling away from the first limiting part of the axis to release the brake, so as to achieve the braking or release the braking effect.

Description

Fan brake structure

This creation relates to a fan brake structure, especially a fan brake structure with better braking effect and power saving.

In many consumer products, it is a trend to use fans as cooling tools. When the temperature of the electronic product is too high, the fan will start to reduce the overall temperature of the electronic product to achieve the purpose of heat dissipation. When the temperature of the electronic product drops to a certain value, the fan will stop operating. Therefore, traditionally, in order to prevent the entire electronic product from being burned due to excessive temperature, a heat dissipation fan is usually installed therein for protection. In order to cope with the heat dissipation of components with faster and faster computing speeds, the fan speed requirements will be higher and higher. Therefore, after the fan is powered off during high-speed operation, the fan will continue to run for a period of time due to inertia before it stops completely. Press, the existing braking technology of DC fans is mainly implemented by circuit boards, and there are three types: the first is the power-on brake, which can be realized by software programs. Bridge type (H-Bridge), make the two lower arm MOS transistors normally open, so that the plurality of blades of the fan will generate a magnetic field when they are running, and resist the magnetic field of the magnetic tape to generate resistance to achieve the braking effect. The second is the power-off brake, which is realized by hardware. When the fan is powered off, the electromotive force generated by the inertial operation of the fan blade is provided to the fan inner motor in the hardware to drive the brake circuit, so that the two lower arm MOS transistors Normally open, let the magnetic field generated by the plurality of blades of the fan rotate, and the magnetic field of the magnetic tape to resist each other to generate resistance and achieve the braking effect. The third method is the solenoid valve control brake mechanism. The fan power supply directly supplies power to the solenoid valve. When the fan is running normally, the solenoid valve is normally open. Only when the fan is powered off, the solenoid valve loses its function and then achieves the braking effect. This method makes the solenoid valve need to use electricity for a long time. Therefore, the existing fan braking technology must be designed to add an additional braking circuit on the original circuit board of the fan or install a microprocessor with a braking mode function to have a braking effect. However, braking through the aforementioned circuit braking method can only wait for the still running The plurality of fan blades stop rotating slowly, and it is impossible to speed up the fan blades to stop rotating in a short time or immediately, that is, it is impossible to shorten the time between the power loss of the circuit brake structure and the complete stop, and then turn on the fan to run and dissipate heat. Reduce work efficiency, and when it is not completely stopped, it is very easy to produce shaking and self-rotation, thereby increasing the occurrence of work hazards. Secondly, on the original circuit board of the fan, there are already some components with existing functions and the connecting lines between them, which will make it impossible to directly add the brake circuit on the original circuit board, so that the industry must use a new circuit board to re-modify. The brake circuit can only be added to the original design on the circuit board, which not only increases the cost of use, but also makes the above-mentioned method of the existing fan brake less common.

In order to effectively solve the above-mentioned problems, one purpose of this invention is to provide a fan brake structure, through which the first and second brake modules in a brake device can be mutually interlocked and pushed when a fan is powered off, so that the first brake module Lock the brake relative to the axis or release the brake effect by separating. Another purpose of this invention is to provide a fan brake structure, which can improve work efficiency and reduce the occurrence of work hazards. Another purpose of this creation is to provide a fan brake structure that only consumes electricity during the brake switching process, reduces electricity consumption, reduces use costs, and conforms to energy-saving development. For reaching above-mentioned purpose, this creation system provides a kind of fan braking structure, comprises: a fan, a braking device; An axle center is pivotally arranged in the axle tube, the stator is sheathed outside the axle barrel and corresponds to the fan wheel, one end of the axle center has a first restricting part; the braking device is arranged at the bottom of the axle barrel It is electrically connected to a circuit board and has a driving part, a braking part and an elastic part. The elastic part supports one end of the braking part. The other end of the braking part has a convex body. The driving part has a spiral track. When the driving part rotates, the convex body moves corresponding to the helical track, so that the brake part rises and clamps the first restricting part of the shaft to lock and brake or descends and is pushed away from the first part of the shaft by the push of the elastic part. The linear reciprocating movement of the limit part to release the brake achieves the function of repeatedly actuating the brake or releasing the brake. With the above structure, when the fan fails, the convex body slides corresponding to the helical track through the rotation of the driving member, so that the brake member rises and the first restricting part clamped on the shaft is locked to produce a braking effect. Or the brake part is affected by the rebound force of the elastic part and falls away from the first limiting part of the axis to release the brake resistance and restore the normal operation of the fan. In this way, the purpose of performing repeated braking or canceling the braking function in real time and obtaining a better braking effect is achieved, and the purpose of using electricity is only required during the switching process of the braking.

The above-mentioned purpose of this creation and its structural and functional characteristics will be described according to the embodiments of the accompanying drawings. Please refer to Figure 1, which is a combined three-dimensional partial cross-sectional schematic diagram of the fan brake structure of this creation; Figure 2A is a partial enlarged schematic diagram of Figure 1 of the fan brake structure of this creation; Figure 2B is the brake in Figure 2A of the fan brake structure of this creation Exploded view of the device; Figure 2C is a three-dimensional view of the driving part of the fan brake structure in Figure 2A; Figure 3 is a schematic diagram of the fan brake structure of this creation (1); Figure 4 is a schematic diagram of the fan brake structure of this creation (two). As shown in FIGS. 1 , 2A to 2C , the invention discloses a fan brake structure 100 including a fan 1 and a brake device 2 . The fan 1 at least includes a frame body 11, a fan wheel 13 and a stator 15; wherein, a hollow shaft tube 12 is vertically provided at the center of one side of the frame body 11, and the shaft tube 12 has a first An opening 121 and a second opening 122, the first opening 121 is opened on the upper end of the shaft cylinder 12 and opposite to the fan wheel 13, and the first opening 121 communicates with the second opening 122, the second opening 122 It is provided at the bottom end of the shaft cylinder 12 (as shown in FIG. 3 ), and at least one bearing 14 is sleeved on the inner side of the shaft cylinder 12 . The aforementioned fan wheel 13 is contained in the frame body 11, and the fan wheel 13 has an axis 131, a hub 132, and a plurality of blades 133 are formed on the outer peripheral side of the hub 132, and one end of the axis 131 is connected to Vertically arranged at the center of the inner side of the hub 132, the other end of the shaft 131 (i.e. the free end of the shaft 131) passes through the bearing 14 and pivots with the bearing 14 and runs through the second shaft opposite to the shaft 12. At the opening 122, there is a first restricting portion 134 on the free end of the shaft 131. In this embodiment, the first restricting portion 134 is recessed inwardly from the end of the free end of the shaft 131. a groove. The aforementioned stator 15 is sleeved on the outside of the shaft cylinder 12 and corresponds to the fan wheel 13 . The brake device 2 is located at the bottom of the shaft tube 12 and is electrically connected to a circuit board 4. The brake device 2 includes a base frame 21, a first brake module 22 and a second brake module 23; wherein The base frame 21 is arranged on the bottom end of the shaft cylinder 12 and docked at the second opening 122, the first braking module 22 and the second braking module 23 are arranged in sequence from top to bottom In the base frame 21, one side (i.e. the upper side) of the first braking module 22 corresponds to the free end of the axis 131 in the shaft cylinder 12, and the other side (i.e. the lower side) of the first braking module 22 is ) can be in contact with the second braking module 23. The circuit board 4 is arranged under the second brake module 23 and has an electrical connection part 41 and an electrical storage element 42, wherein the electrical connection part 41 is for example a pin socket or a cable or an electrical wire or Contacts, etc., the storage element 42 is preferably a capacitor as an element for storing and releasing energy. Therefore, the power storage element 42 is used to store power with a predetermined amount of power when the power is normally supplied, and release the stored power to the braking device 2 when the power is off. Specifically, as shown in Figures 2A to 2C, the aforementioned first braking module 22 is provided with a braking member 221 and an elastic member 224; the braking member 221 has a lower surface 2211 and an upper surface 2212, and the lower surface 2211 and The upper surface 2212 is respectively provided with a convex body 222 and a second restricting portion 223. In this embodiment, the convex body 222 of the braking member 221 is a longitudinal convex body extending downward from the lower surface 2211, so as to be in contact with Opposite to the second braking module 23, the second restricting portion 223 of the braking member 221 is a longitudinal clamping block extending upward from the upper surface 2212, for connecting with the first free end opposite to the shaft center 131. The restricting parts 134 (grooves) are embedded (inserted) into each other or separated from each other. The aforementioned elastic member 224 is located in the base frame 21 and sleeved on the periphery of the second restricting portion 223 (blocking block) and is located on the upper surface 2212 of the braking member 221. In this embodiment, the elastic member 224 is It is a conical helical spring and has a first brake elastic part 2241 and a second brake elastic part 2242. The first brake elastic part 2241 is fixed in contact with an upper end of the base frame 21. The two braking elastic parts 2242 are in contact with the upper surface 2212 of the braking member 221 and are normally expanded toward the second braking module 23 to push against the braking member 221, so that the convex body 222 of the braking member 221 is in contact with the braking member 221. The second braking module 23 is in contact. Further, in order to limit that the braking member 221 of the aforementioned first braking module 22 can only move linearly in the up and down direction relative to the base frame 21, so that the braking member 221 can be raised or moved in the base frame. The second restricting portion 223 (such as a clamping block) is lowered so that the first restricting portion 134 (such as a groove) at the free end of the shaft 131 can be engaged with or separated from each other. In this embodiment, the base frame 21 is provided with a through hole 211 for receiving the stopper 221 , and the stopper 221 has an outer peripheral side 225 matching the through hole 211 . Moreover, the through-hole portion 211 of the base frame 21 and the outer peripheral side 225 of the stopper 221 are geometric shapes such as a rectangle, a rectangle, a polygon, or other shapes that cooperate with each other, so that the stopper 221 is restricted in the through-hole. The inside of the hole portion 242 reciprocates linearly up and down relative to the base frame 21 . Moreover, in order to achieve the purpose that the first restricting portion 134 on the free end of the shaft 131 and the second restricting portion 223 on the braking member 221 can be separated from each other or engaged with each other. The engaging structure of the first restricting part 134 and the second restricting part 223 can also adopt, for example: a structure of a concave hole (tenon) and a tenon (hole), or a concave hole (bump) and a bump (Concave hole) phase configuration structure, or other structural design, and does not limit the geometric shape of its phase configuration, including but not limited to this. Specifically, as shown in Figures 2A to 2C, the aforesaid second brake module 23 is provided with a power part 231 and a drive part 232, and the power part 231 is an electric motor with a rotor, or other electric power tools are connected through the electric motor. The connection part 41 is electrically connected to the circuit board 4; in this embodiment, the motor of the power part 231 is preferably a motor. The aforesaid drive member 232 is a cam and is arranged on the upper side of the rotor of the power member 231 (motor/motor) in a shaft connection. When the power member 231 (motor/motor) drives the rotor to rotate, the drive member 232 can be rotated synchronously, and the drive member 232 There is a spiral track A on the top side surface of the top surface, and the spiral track A is provided with a first top control area 2321 and a second top control area 2322, and the first top control area 2321 and the second top control area 2322 are connected A helicoid a is formed. Further, in this embodiment, the first top-making area 2321 and the second top-making area 2322 are designed with different heights from each other, for example, as shown in Figure 2C, the first top-making area 2321 is set as the upper area, and the The second top control area 2322 is set as the lower area, so that the helicoid a is designed as an inclined helicoid; so when the rotor of the power part 231 drives the driving part 232 to reciprocate in a first position L (toward the left as shown in Fig. 2C ) and a second position R (toward the right as shown in Fig. 2C), so that the convex body 222 of the lower surface 2211 of the braking member 221 is respectively connected to the first top control area 2321 or the corresponding driving member 232 The second topping area 2322 is in contact. In more detail, when the brake device 2 is rotated toward the first position L by the driving member 232, the protrusion 222 moves to the first top control area (upper area) and is pushed upward, so that the The stopper 221 moves upward relative to the base frame 21 , so that the second restricting portion 223 fits (inserts) into the first restricting portion 134 and compresses the elastic member 224 (as shown in FIG. 4 ). If the driving member 232 rotates toward the second position R, the convex body 222 moves to the second top control area 2322 (lower area), so that the elastic member 224 is relaxed and provides an expansion elastic force Push the braking member 221 to move downward toward the driving member 232 of the second braking module 23, so that the second restricting part 223 is relatively separated from the first restricting part 134 (as shown in FIG. separated state. In practice, with the above structure, as shown in FIG. 3, under normal operating conditions, the fan 1 is powered normally through the circuit board 4, and the driving member 232 of the second braking module 23 is controlled by the second top. The region 2322 (lower region) is in contact with the convex body 222 of the lower surface 2211 of the braking member 221 opposite to the first braking module 22. At this time, the elastic member 224 is in a relaxed state and provides an expansion elastic force, and at the same time the braking The upper surface 2212 of the member 221 is pushed by the expansion elastic force of the elastic member 224, so that the brake member 221 moves downward relative to the direction of the driving member 232 in the through hole portion 242 of the base frame 21, and makes the brake member The convex body 222 on the lower surface 2211 of the 221 is in contact with the second restraining area 2322 (lower area) of the driving member 232, so that the second restricting portion 223 (blocking block) on the upper surface 2212 of the braking member 221 is in contact with the The first restricting portion 134 (groove) at the free end of the shaft 131 is separated without a braking effect, and the fan 1 is running normally. Furthermore, as shown in Figure 4, when the fan 1 fails to detect a signal (such as a speed signal (FG: Frequency Generation) or a rotation detection signal (RD: Rotation Detection), the fan 1 is in a power-off state At this time, the power storage element 42 of the circuit board 4 releases the power to the rotor of the power part 231 to rotate, and then drives the driving part 232 of the second brake module 23 toward the first position L direction (towards the left as shown in Fig. 2C ) is rotated, the protrusion 222 on the lower surface 2211 of the braking member 221 moves from the second top control area 2322 (lower area) to the first top control area 2321 (upper area) along the helicoid a and form a state of being pushed upwards, so that the brake member 221 is restricted by the sliding structure 24 relative to the through hole 42 of the base frame 21 and moves upwards, and at the same time, the upper surface 2212 of the brake member 221 is pressed against The elastic member 224 makes the elastic member 224 in a compressed state, and makes the second restricting portion 223 (blocking block) on the upper surface 2212 of the braking member 221 and the first restricting portion on the free end opposite to the shaft center 131 134 (groove) are fitted and clamped to achieve the effect of braking. At this time, utilize the second limiting portion 223 (blocking block) of the braking member 221 and the first limiting portion 134 (concave block) relative to the axis 131 Groove) phase fitting card is made locking brake, can also prevent aforementioned fan wheel 13 back winds from blowing reverse, to have the effect that prevents from producing reverse braking force. Also, as shown in FIG. 3, when the fan 1 returns from power-off to power-on, the power member 231 obtains power from the circuit board 4 and rotates to drive the driving member 232 toward the second position R (as shown in FIG. 2C ). When it rotates to the right side), the protrusion 222 of the lower surface 2211 of the stopper 221 moves from the first top control area 2321 (upper region) to the second top control area 2322 ( lower region) and forms a non-pushed state, and the elastic member 224 changes from compression to relaxation and expansion and provides an expansion elastic force to push the upper surface 2212 of the stopper 221, and at the same time, the stopper 221 is moved due to the sliding structure 24 It is restricted to move downward relative to the through hole portion 42 of the base frame 21 and toward the driving member 232 of the second braking module 23, so that the second restricting portion 223 on the upper surface 2212 of the braking member 221 is opposite to the The first restricting portion 134 on the free end of the shaft 131 is separated to release the locking brake and resume the operation of the fan. Therefore, through the design of the fan brake structure of this invention, when the fan 1 is powered off and fails, when the driving member 232 of the aforementioned second braking module 23 of the present invention is used to rotate toward the first position L, the driving member 232 will use its Push the protrusion 222 on the lower surface 2211 of the brake part 221 of the first brake module 22 upwards on the first top control area 2321 (upper region), so that the brake part 221 moves up in the base frame 21, And the second restricting portion 223 on the upper surface 2212 of the braking member 221 is engaged and locked with the first restricting portion 134 opposite to the free end of the axis 131, thereby generating braking resistance, so that the stalling effect of the fan wheel 13 can be accelerated. And the fan braking structure of the present invention is faster and faster than the braking of the conventional braking circuit. In addition, when the driving member 232 is rotated toward the second position R, the driving member 232 is loosened relative to the convex body 222 with the second top restraining area 2322 (lower area) on it, and the braking member 221 is controlled by the The tension of the elastic member 224 is released so that the second restricting portion 223 is separated from the first restricting portion 134 corresponding to the free end of the shaft 131 and released without braking resistance. At this time, the fan can operate normally again. Therefore, when the driving part is rotated in the present invention, the protrusion of the brake part slides corresponding to the spiral track, so that the brake part rises in the base frame and the second restricting part clamps the first axis of the shaft. One restricting part locks the brake, or makes the brake part descend in the base frame so that the second restricting part is detached from the first restricting part of the axis and unlocked to form a linear reciprocating motion, which can quickly obtain the brake or release the brake function, and Power consumption is only required during the brake switching process, which reduces power consumption and lowers the cost of use. Moreover, since the fan brake structure of this invention is a peripheral device, it has good commonality and is suitable for fans of various series.

100: Fan brake structure 1: fan 11: frame 12: Shaft barrel 121: First opening 122: second opening 13: fan wheel 131: axis 132: hub 133: blade 134: First Restricted Department 14: Bearing 15: Stator 2: brake device 21: pedestal 211: Through hole 22: The first brake module 221: brake parts 2211: lower surface 2212: upper surface 222: convex body 223: Second Restricted Department 224: Elastic parts 2241: The first brake bullet 2242: The second brake bullet 225: Peripheral side 23: The second brake module 231: power parts 232: Driver A: spiral track 2321: The first top control area 2322: The second top control area a: Helicoid L: first position R: second position 4: Circuit board 41: Electrical connection parts 42: Electricity storage element

Figure 1 is a combined three-dimensional partial cross-sectional schematic diagram of the fan brake structure of this creation; Figure 2A is a partially enlarged schematic diagram of Figure 1 of the fan brake structure of this creation; Figure 2B is an exploded view of the brake device in Figure 2A of the fan brake structure of this creation; Figure 2C is a three-dimensional view of the driving part in Figure 2A of the fan brake structure of this creation; Figure 3 is a schematic diagram of the action of the fan brake structure of this creation (1); Figure 4 is a schematic diagram (2) of the operation of the fan brake structure of this creation.

131: axis

134: First Restricted Department

2: brake device

21: pedestal

22: The first brake module

221: brake parts

2211: lower surface

2212: upper surface

222: convex body

223: Second Restricted Department

224: Elastic parts

2241: The first brake bullet

2242: The second brake bullet

23: The second brake module

231: power parts

232: Driver

Claims (10)

A fan braking structure, comprising: a fan with a frame body, a fan wheel and a stator, the frame body is vertically provided with a shaft tube, the fan wheel is vertically provided with an axis and pivotally arranged in the shaft tube, the stator Sleeved on the outside of the shaft tube and corresponding to the fan wheel, one end of the shaft center has a first restricting part; and A braking device, located at the bottom of the shaft tube and electrically connected to a circuit board, the braking device has a driving part, a braking part and an elastic part, the elastic part supports one end of the braking part, and the other end of the braking part has A convex body, the driving part has a helical track, when the driving part rotates, the convex body moves corresponding to the helical track, so that the brake part can go up and lock the first restricting part of the axis to lock and brake or go down And the linear reciprocating motion of the brake is released by pushing against the first limiting part of the axis through the pushing of the elastic member. The fan brake structure as described in claim 1, wherein the braking device has a power part and a base frame, the base frame is arranged at the bottom end of the shaft cylinder, the power part is arranged at a bottom of the base frame and is pivoted The driving part is electrically connected to the circuit board to drive the driving part to rotate. The braking part is arranged in the base frame and has a lower surface and an upper surface. The lower surface and the upper surface respectively have the convex body and a first Two restricting parts, and the second restricting part is locked or separated from the first restricting part. The elastic member is arranged in the base frame and has a first braking elastic part and a second braking elastic part. The first brake elastic part is fixed on an upper end of the base frame, and the second brake elastic part is arranged on the upper surface of the brake part and expands and pushes toward the driving part under normal conditions, so that the protrusion of the brake part contact with the driver. The fan brake structure as described in claim 2, wherein the shaft has a free end that passes through the shaft tube, the first restricting part is recessed from the end of the free end to form a groove, and the second restricting part is A clamping block is formed outwardly from the upper surface of the braking member, so that the second restricting portion can be inserted into the first restricting portion, and the braking member moves up and down in a straight line relative to the base frame, so that the The second restricting part is relative to the first restricting part or is separated from the first restricting part. The fan brake structure as described in claim 3, wherein the power part of the brake device is a motor with a rotor, the driving part is arranged on the upper side of the power part, and the spiral track is located on the other side surface of the driving part. There is a first top control area and a second top control area, and the first top control area and the second top control area have different heights and are connected to form a helical surface. The fan brake structure as described in Claim 4, wherein the rotor of the power component drives the drive component to rotate toward a first position, and the convex body of the brake component moves to the first top relative to the helical surface of the drive component. The control area is pushed up, and the braking member is restricted to move upward relative to the base frame, so that the second restricting portion is fitted with the first restricting portion and compresses the elastic member. The fan brake structure as described in Claim 4, wherein the rotor of the power component drives the drive component to rotate toward a second position, and the convex body of the brake component moves to the second top through the helical surface of the drive component. and the braking member is not pushed, so that the elastic member is loosened and an elastic force is provided to push the braking member to move downward toward the driving member, so that the second restricting part is separated from the first restricting part . The fan braking structure according to claim 2, wherein the circuit board has an electric storage element, and when the fan is powered off, the electric storage element releases electric energy to the power part of the braking device to drive the driving part to rotate toward a first position , make the convex body of the braking member move along the spiral track to a first top control area, and drive the braking member to move toward the axis and interlock with the first restricting portion to generate a locking braking effect, wherein The electric storage element is a capacitor. The fan brake structure as claimed in claim 2 or 7, wherein the power part of the brake device is driven to rotate to a second position through the driving part when the fan is energized and running, so that the protrusion moves along the spiral track to A second top control area, and drives the brake member to move away from the first restricting portion of the shaft without braking effect. The fan brake structure as described in claim 3, wherein a through hole is provided in the base frame, the braking member has an outer peripheral side matching the through hole, and the through hole and the outer peripheral side are geometric shapes that cooperate with each other . The fan brake structure according to claim 1, wherein the elastic member is a conical coil spring.

Images