KR102617322B1 - A boss unit for a fan having a hub buffer coupling part - Google Patents

Abstract

The fan boss unit with the hub buffer coupling according to the present invention has a shaft coupling hole coupled to the drive shaft of the motor formed in the longitudinal direction, a shaft coupling boss member with a first coupling portion formed, and a shaft coupling boss member coaxial with the central axis of the shaft coupling boss member. It is located in and a through hole into which the shaft coupling boss member is inserted is formed, a second coupling part is formed on the inner peripheral surface of the through hole to increase the coupling force with the first coupling part, and a third coupling part is coupled to the hub of the fan at the edge. a fan coupling boss member, a first buffer coupling portion including a buffer member coupled to a first coupling portion of the shaft coupling boss member and a second coupling portion of the fan coupling boss member, and the fan coupling boss member. It is installed on the third coupling part and the hub and has a hub buffering coupling part to reduce shock and vibration generated by the rotational load of the drive shaft and blower fan.

Description

Boss unit for a fan having a hub buffer coupling part {A boss unit for a fan having a hub buffer coupling part}

The present invention relates to a boss unit, and more specifically, to a boss unit for a fan that is mounted on a fan, provides coupling force with a drive shaft to rotate the fan, and has a hub buffer coupling portion for transmitting the rotational force of the drive shaft to the fan.

In general, fans are used for cooling or blowing by causing air flow, and are made of synthetic resin or metal. These fans are widely applied to experimental equipment such as thermohygrostats that require precision, durability, or heat resistance, as well as automobiles, industrial equipment, industrial facilities, refrigerators, and air conditioners. They are combined with a drive shaft in the center to transmit rotational force. ) is installed, and wings are installed radially on the outer peripheral surface of the hub to generate air flow.

The boss installed on the hub of the fan absorbs the rotational force of the drive shaft, the shock caused by the rotational torque of the drive shaft when the rotational force is transmitted, and the vibration caused by the load acting on the fan, and reduces noise.

Republic of Korea Patent Publication No. 10-2010-0030182 discloses a fan boss unit and its manufacturing method. The posted fan boss unit is filled between a first boss member coupled to the drive shaft of the motor, a second boss member insert molded into the wing portion including the rotary blade, and the first and second boss members. It interconnects the second boss members and includes a buffer member formed of an elastic material capable of absorbing shock caused by the rotational force of the motor.

As described above, the conventional fan boss unit can absorb shock due to rotation by installing a buffer member between the first and second boss members, but the buffer member coupled to the first boss member is made of a heterogeneous material, so it is relatively Cohesion is not good. Therefore, there is a problem in that the first boss member and the buffer member are separated by the continuous impact force for driving the fan.

In particular, the fan boss unit has a problem in which the second boss member and the insert molding portion of the hub are separated or damaged due to vibration and impact due to rotational torque in the rotational direction and fatigue due to axial thrust in the axial direction when the second boss member and the insert molding portion of the hub are rotated by the drive shaft. There is. Separation of the insert molding part of the wing and the second boss member is the main cause of vibration and noise.

The present applicant has registered the fan boss unit under Republic of Korea Patent No. 10-1985679.

And in Republic of Korea Patent Publication No. 2012-0012665, an anti-vibration boss is posted. The posted anti-vibration boss includes a protrusion that protrudes in an inclined direction and extends downward on a first boss member in which a hollow is formed to allow the rotation axis of the motor to be inserted, and a second boss member supported by the anti-vibration member.

The vibration-proof boss can improve the coupling force with the wing, but cannot fundamentally solve the problems caused by separation from the hub, vibration, and noise as described above.

In particular, the vibration isolation member installed between the first boss member and the second boss member is made of an elastic material for the purpose of alleviating shock and attenuating vibration, and as the wing rotates, it continues to generate shock and external force in the circumferential and axial directions. Because of this effect, after use for a certain period of time, the vibration isolation member, the first boss member, and the second boss member are spaced apart, causing slip, and the joint area between the second boss member and the hub is separated, causing noise. there is.

Republic of Korea Patent Publication No. 10-2010-0030182 Republic of Korea Patent No. 10-1985679 Republic of Korea Public Patent No. 2012-0012665

The present invention is intended to solve the problems described above, and is a hub buffer that is combined with a drive shaft and can reduce noise generation by absorbing vibration and shock transmitted from the drive shaft to the shaft coupling boss member and hub in multiple stages when rotating force is transmitted. The purpose is to provide a boss unit for a fan having a coupling portion.

Another object of the present invention is to improve the combined bearing capacity by expanding the combined area of the buffer member, the shaft-coupled boss member, and the fan-coupled boss member, and to improve the stabilization of the roundness and balance of the fan boss-coupled member with respect to the shaft-coupled boss member. The aim is to provide a boss unit for a fan having a hub buffer coupling unit.

In order to achieve the above object, the fan boss unit with the hub buffer coupling part of the present invention includes a shaft coupling boss member in which a shaft coupling hole coupled to the drive shaft of the motor is formed in the longitudinal direction and a first coupling portion is formed,

It is located on the same axis as the central axis of the shaft-coupling boss member, and a through hole into which the shaft-coupling boss member is inserted is formed. A second coupling portion is formed on the inner peripheral surface of the through hole to increase the coupling force with the first coupling portion, and is formed on the edge portion. A fan coupling boss member including a third coupling portion coupled to the hub of the fan,

A first buffer coupling portion coupled to the first coupling portion of the shaft coupling boss member and including a buffer member coupled to a second coupling portion of the fan coupling boss member;

It is characterized by having a hub buffering coupling part installed on the third coupling part of the fan coupling boss member and the hub to reduce shock and vibration generated by the rotational load of the drive shaft and blowing fan.

In the present invention, the third coupling portion has a dovetail-shaped grip groove formed on the edge of the fan coupling boss member, and the hub buffer coupling portion has a material on the outer peripheral surface of the third coupling portion that is softer than the material of the fan coupling boss member and the hub. It includes a coating layer formed by coating the resin. The material forming the coating layer is made of silicon.

The boss unit for a fan having a hub buffer coupling portion according to the present invention reduces rotational torque, impact force due to the load applied to the fan, vibration, and vibration and noise due to thrust in the axial direction of the fan when transmitting the rotational force of the drive shaft of the motor to the fan. It can be reduced. In particular, it is possible to prevent the shaft-coupled boss portion, the fan-coupled boss member, and the buffer member from being separated due to a load in the axial direction of the fan when the motor drive shaft rotates.

1 is a perspective view showing a fan boss unit having a hub buffer coupling portion according to the present invention installed on a fan;
Figure 2 is a partially cut perspective view of the boss unit for a fan having a hub buffer coupling portion according to the present invention;
Figure 3 is a partially cut perspective view showing another embodiment of the boss unit for a fan having a hub buffer coupling portion according to the present invention;
Figure 4 is an exploded perspective view showing another embodiment of the boss unit for a fan having a hub buffer coupling portion according to the present invention;
Figure 5 is a cross-sectional view of the fan boss unit having the hub buffer coupling shown in Figure 4;
Figure 6 is an exploded perspective view showing another embodiment of a boss unit for a fan having a hub buffer coupling portion according to the present invention;
Figure 7 is a cross-sectional view of the boss unit for a fan having the hub buffer coupling shown in Figure 6.

The present invention shows an embodiment of a boss unit for a fan having a hub buffer coupling portion in FIGS. 1 to 3.

Referring to the drawing, the boss unit 10 for a fan having a hub buffer coupling portion according to the present invention is the hub 110 of the fan 100 for blowing, that is, the rotation center of the hub 110 with wings 120 formed on the outer peripheral surface. It is combined to transmit rotational force to the fan and reduce vibration and noise. The fan 100 may be a sirocco fan, an axial fan, etc., but is not limited thereto.

The fan boss unit 10 having the hub buffer coupling portion has a shaft coupling hole 21 coupled to the drive shaft 210 of the motor 200 formed on the central axis, and is coupled to a buffer member 40 to be described later on the outer peripheral surface. An shaft-coupled boss member (20) having a first coupling portion (25) forming a first buffer coupling portion, and a shaft-coupled boss member (20) located coaxially with the central axis of the shaft-coupled boss member (20). A through hole 31 into which is inserted is formed, a second coupling portion 32 is formed on the inner peripheral surface of the through hole 31, and a third coupling portion 35 coupled to the hub 110 is formed along the outer edge. It is provided with a formed fan coupling boss member (30).

In addition, the fan boss unit 10 having a hub buffer coupling portion is a buffer member that couples the first coupling portion 25 of the shaft coupling boss member 20 and the second coupling portion 32 of the fan boss member 30. It is installed at the coupling portion of the first buffer coupling portion 40 including (41), the third coupling portion 35 of the fan boss member 30, and the hub 110, and is moved by the rotational load of the blowing fan. It is provided with a second buffer coupling portion 60 to reduce the generated shock and vibration.

The fan boss unit 10 having a hub buffer coupling portion according to the present invention configured as described above will be described in more detail for each component as follows.

The shaft coupling boss member 20 of the fan boss unit 10 having the hub buffer coupling portion is formed in a cylindrical shape with a central shaft coupling hole 21 as shown in Figures 1 and 2, and has a first coupling on the outer peripheral surface. A portion 25 is formed, and the first coupling portion 25 has a coupling portion 26 formed stepwise on the outer peripheral surface. The binding portion 26 is penetrated in the axial direction up and down to form a plurality of binding holes 27 spaced apart from each other, and the binding hole 27 is formed by cutting a portion of the outer peripheral surface of the binding portion 26 on one side. A cut hole 28 is formed to open a portion of the binding hole to communicate with the outside, and a plurality of peripheral grooves 29 cut in the circumferential direction are formed at regular intervals on the outer peripheral surface of the binding portion 26 to form multiple layers. do. At this time, the plurality of binding holes 27, cut holes 28, and peripheral grooves 29 are formed to communicate with each other. That is, the binding hole 27 provided in the binding portion 26 is formed by hole processing in the axial direction, and the peripheral groove 29 provided on the outer peripheral surface of the binding portion 26 has a predetermined depth. It is formed by cutting and processing.

Figure 3 shows another example of the shaft-coupled boss member according to the present invention. Referring to the drawing, the shaft coupling boss member 70 is provided with a main body portion 75 having a shaft coupling hole 71 into which the drive shaft 210 of the motor for driving in the axial direction is coupled, and its outer peripheral surface is formed in the axial direction. That is, dovetail-shaped support grooves 72 are formed in a direction parallel to the direction in which the shaft coupling hole 71 is formed. And peripheral grooves 73 connecting the support grooves 72 to each other are formed on the outer peripheral surface of the main body portion 75 to a predetermined depth. The formation depth of the peripheral groove 72 and the formation depth of the support groove 72 are formed at the same depth and communicate with each other.

The shaft-coupling boss member 70 is not limited to the above-described embodiments, and can be any structure that can be combined with the drive shaft of the motor and the buffer member.

The fan coupling boss member 30 is made of a plate-shaped member as shown in FIGS. 2 and 3, and can transmit the rotational force of the shaft coupling boss member 20 to the hub 110 of the fan 100. It includes a second coupling portion 32 that is coupled to the buffer member 41 supported on the shaft coupling boss member 20 and a third coupling portion 35 that is insert molded on the hub 110 side of the fan 100. do.

This fan coupling boss member 30 has a through hole 31 formed in the center of the disk-shaped member, which is larger than the diameter of the fan coupling boss member 30 and smaller than the outer diameter of the buffer member 41. And the second coupling portion 32 including the inner peripheral surface of the through hole 31 is provided with coupling holes 33 formed at a predetermined distance from the edge of the through hole 31.

As shown in Figures 4 and 5, the second coupling portion 32 protrudes from the inner peripheral surface of the through hole 31 and protrudes toward the cut hole 28 or support hole 72 of the shaft coupling boss member 20. A protruding coupling support protrusion 34 may be formed, and as shown in FIGS. 6 and 7, the inner peripheral surface of the through hole 31 and the area adjacent thereto may be formed with a curved portion 37 curved downward. there is. And coupling holes 38 are formed in the curved portion 37 formed in the shaft coupling boss member 20.

Meanwhile, the first buffer coupling portion 40 is formed by insert molding the first coupling portion 25 of the shaft coupling boss member 20 into the buffer member 41, as shown in FIGS. 2 to 7. As such, a buffer member is installed in the binding hole 27, the cut hole 28, and the peripheral hole 29 of the first coupling portion 25 of the shaft coupling booth member 20 installed in the central axis direction of the left buffer member 41. The synthetic resin or synthetic rubber resin forming (40) is filled to increase the bonding force between the buffer member (40) and the first coupling portion (25).

As shown in FIG. 3, when the shaft-coupled boss member 20 has a support groove 72 and a peripheral groove 73 formed in the longitudinal and circumferential directions, a buffer member 41 is placed between them when insert molding into the buffer member. ) is filled to increase the bonding force between the shaft-coupled boss member 20 and the buffer member 41.

In particular, as shown in FIG. 5, a coupling support protrusion 34 extending to the cut hole 28 is formed on the first coupling portion 25 forming the first buffer coupling portion 40, so that the rotation of the drive shaft Damage to the buffer member due to the rotational torque and initial load acting on the fan can be prevented, and the rotational force by the drive shaft can be increased.

And as shown in FIG. 7, when a curved portion 37 curved in the axial direction is formed in the first coupling portion 25 of the fan boss coupling member 20 constituting the first buffer coupling portion 40, the curved portion Since the coupling hole 78 is formed in (37), the support force for the buffer member 41 can be increased when insert molding the buffer member 41. In particular, the curved portion 41 can lower the center of coupling with the buffer member 41, thereby improving coupling stability.

Meanwhile, the hub buffer coupling portion 60 may be formed by insert molding on the third coupling portion 35 of the fan boss coupling member 30 supported by the buffer member 41 and the hub 110 of the fan 100. As such, the outer peripheral surface of the third coupling portion 35 of the fan boss coupling member 30 includes a buffer coating layer 61 coated with an elastic resin softer than the material of the fan boss coupling member 30. The material forming the buffer coating layer 61 may be made of silicone, synthetic rubber, soft natural rubber, or soft synthetic resin.

The buffer coating layer 61 is coated on the outer peripheral surface of the third coupling portion 35, but is not limited to this, and may be installed on the side of the hub coupled to the third coupling portion 35 of the hub of the blowing fan. In order to increase the bonding force when insert molding the buffer coating layer 61 on the hub 110 side of the fan 100, it is preferable to form protrusions or irregularities on the surface of the buffer coating layer 61.

The third coupling portion 35 has support protrusions 36 formed at predetermined intervals on the outer peripheral surface to increase the supporting force of the buffer coating layer 61. However, in order to increase the supporting force of the buffer coating layer 61, the third coupling portion Coating layer support holes (not shown) may be formed at predetermined intervals (35). The diameter of the coating layer support hole is preferably formed to be relatively smaller than the diameter of the coupling hole 33, and the groove between the support protrusions 36 is formed in the shape of a dovetail, so that insert molding with the hub 110 is possible. The coupling force can be increased, and since the buffer coating layer is also formed along the outer peripheral surface of the first coupling portion 35, the support force for the hub can be increased.

The boss unit 10 for a fan having a hub buffer coupling portion according to the present invention configured as described above is installed on the hub 110 of the fan 100 and becomes the drive shaft 201 of the motor 200. As the drive shaft 201 of the motuck and the shaft coupling hole 21 of the shaft coupling boss member 20 rotate, the rotational force of the drive shaft 201 is transmitted to the hub 110 of the fan 100 through the boss unit 10. As it is transmitted, it rotates the fan and generates airflow.

In this process, when the motor 200 is driven, the rotational torque of the drive shaft 201 and the impact force applied by the rotational load acting on the fan 100 connect the shaft coupling boss member 30 and the first coupling portion 25. A hub buffer coupling that is primarily absorbed by the first buffer coupling part 40 and the buffer member 41, and couples the hub 11 with the second coupling part 25 of the fan coupling boss member 41. It is absorbed in multiple stages by the unit 60, thereby reducing the vibration and noise of the fan 100.

To explain this in more detail, the first buffer coupling portion into which the first coupling portion 24 of the shaft coupling boss member 30 is insert molded is the coupling hole 27 and the cut hole 28 of the first coupling portion 25. ) and one side of the synthetic resin or synthetic high part forming the buffer member 41 is accommodated in the peripheral groove 29 and is not exposed to the outside, and the other side of the buffer member 41 is the second side of the fan coupling boss material 30. Since the second arm total coupling portion 60 is formed by insert molding the coupling portion 32, vibration and noise caused by the rotating torque applied by the shaft coupling boss member 30 and the load of the fan can be reduced.

That is, as the drive shaft 201 of the motor rotates, the buffer member 41 expands along the rotation direction, and contracts in the reverse direction of rotation due to a repulsive effect, thereby generating the initial rotation torque and the reverse direction of rotation of the fan. It absorbs the energy of the acting load. In this process, the buffer member 41 coupled to the first coupling portion 25 of the shaft boss coupling member 20 is partially supported by the binding hole 27, and the portion supported by the binding hole 27 is the cut hole. It is connected through (28) and supported by the peripheral holes (29), so it is possible to prevent the buffer member (40) from slipping or being separated from the shaft boss coupling member (20).

As described above, in a state where the primary buffering is achieved by the first buffer coupling portion 40, the rotational force of the drive shaft 201 is generated by the buffer member 41, the fan coupling boss member 30, and the hub buffer coupling portion 60. It is transmitted to the hub 110 of the fan 100 through the hub buffer coupling portion 60, and a buffer coating layer 61 is formed on the outer peripheral surface of the third coupling portion 35 that is insert molded with the hub 110. Therefore, the impact force at the beginning of driving can be prevented from being transmitted to the hub 110 by the buffer coating layer 61.

In particular, since the material of the fan coupling boss member 30 is made of metal and the hub 110 is made of synthetic resin, they may be separated by impact force. The third coupling portion of the fan coupling boss member 30 ( 35) Since a buffer coating layer is formed, separation phenomenon can be prevented by absorbing impact force. However, even if the hub 110 and the third coupling part are separated, the generation of noise can be reduced because the buffer coating layer 61 is installed between them.

On the other hand, when a large driving load is applied to the fan 100 or the strength of the load is repeated, the reaction force and thrust acting in the opposite direction of the rotation direction acting on the blades 120 of the fan 100 are generated by the hub 110. Vibration depending on the strength of the load is primarily absorbed by the buffer coating layer of the hub buffer coupling portion 60, and as the buffer member 41 expands and contracts in the rotation direction, vibration is secondarily absorbed.

As described above, in the boss coupling unit for a fan having a hub buffer coupling unit according to an embodiment of the present invention, the drive shaft 201 of the motor 200 and the buffer member 41 are firmly coupled to each other through the shaft coupling boss member 20. In addition, the buffer member 41 and the fan 100 are firmly coupled through the fan coupling boss member 20 to alleviate shock or vibration generated by the rotational force provided by the motor 200 and the fan 100. It maintains a firm connection even while rotating, preventing slip or breakage due to forces acting in the circumferential and axial directions.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those skilled in the art will understand that various modifications and other equivalent embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the attached registered claims.

Claims (5)

A shaft-coupling boss member in which a shaft-coupling hole coupled to the drive shaft of the motor is formed in the longitudinal direction and a first coupling portion is formed,
It is located on the same axis as the central axis of the shaft-coupling boss member, and a through hole into which the shaft-coupling boss member is inserted is formed. A second coupling portion is formed on the inner peripheral surface of the through hole to increase the coupling force with the first coupling portion, and is formed on the edge portion. A fan coupling boss member including a third coupling portion coupled to the hub of the fan,
A first buffer coupling portion coupled to the first coupling portion of the shaft coupling boss member and including a buffer member coupled to a second coupling portion of the fan coupling boss member;
It is provided with a third coupling part of the fan coupling boss member and a hub buffer coupling part installed on the hub to reduce shock and vibration generated by the rotational load of the drive shaft and blower fan,
A fan boss unit with a hub buffer coupling portion, characterized in that a coupling support protrusion is formed on the inner peripheral surface of the through hole of the fan coupling boss member to be inserted into a cut hole or support groove formed in the first coupling portion of the shaft coupling boss member. According to clause 1,
The fan boss unit having a hub buffer coupling portion, characterized in that the hub buffer coupling portion includes a coating layer formed by coating the outer peripheral surface of the third coupling portion with a resin softer than the material of the fan coupling boss member and the hub. According to clause 2,
A fan boss unit with a hub buffer coupling portion, wherein the coating layer is made of synthetic resin or silicon. delete According to clause 1,
A fan boss unit with a hub buffer coupling, characterized in that a curved portion curved toward the lower side of the shaft coupling boss member is formed at the second coupling portion of the fan coupling boss member.

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