KR101776082B1 - Mixing shaft for agitator - Google Patents

Abstract

A mixing shaft for an agitator is disclosed. The mixing shaft for an agitator comprises: a shaft body; a first hub and a second hub which are detachable from both sides of the shaft body and are symmetrical with respect to a longitudinal axis which is an axial direction of the shaft body; and a plurality of blades protruding from the outer surface of the first and second hubs in a spiral form. The hubs in which the blades are formed can be attached to and detached from the shaft body, and thus a user can adjust the agitating degree by the viscosity and height of an agitating object, and can add or remove the hubs.

Description

[0001] MIXING SHAFT FOR AGITATOR [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixing shaft for an agitator, and more particularly, to a mixing shaft for an agitator for effectively stirring an object by a plurality of removable hubs and a plurality of blades formed on an outer surface of the hubs.

2. Description of the Related Art Generally, an agitator is a device for mixing a liquid-containing substance and the like. The mixing shaft is immersed in an agitating object, and then the agitating object is mixed by driving the motor. Specifically, the impeller attached to the mixing shaft rotates, a swirling flow is formed in the stirring object by the rotating impeller, and agitation is performed in the process of flowing the stirring object according to the swirling flow.

Here, a propeller-type impeller was used as a conventional stirrer. Since the impeller has a relatively large turning radius, when the size of the water tank or the like in which the stirring object is stored is smaller than the length of the impeller, the stirrer can not be used.

In addition, in the case of the conventional stirrer, the agitating property of the stirring object is determined according to the number of the impellers. Therefore, the number of impellers must be increased in order to mix the objects to be stirred. However, when the depth of the water tank in which the object to be stirred is stored is shallow, there is a problem that addition of the impeller is limited.

Further, in the case of a conventional stirrer, it is necessary to add an impeller to improve the agitating property of the stirring object. However, in general, since the impeller is welded to the mixing shaft, when the number of the impellers is increased or decreased, much effort and cost are consumed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an agitator for stirring an object to be agitated efficiently by allowing a plurality of blades to be formed and attaching a plurality of removable hubs to both sides of the mixing shaft, In order to provide a mixing shaft.

In order to achieve the above object, a mixing shaft for an agitator according to an embodiment of the present invention includes a shaft body, a first and a second shaft which are detachable from both sides of the shaft body, 2 hub, and a plurality of blades protruding spirally on an outer surface of each of the first and second hubs.

Also, the first and second hubs may have a larger diameter in one direction of the longitudinal axis.

Further, the first and second hubs may each include a magnet disposed in a groove and a groove formed at the same position on each of the facing surfaces.

And may further include third and fourth hubs symmetrical to the first and second hubs, respectively, with respect to the horizontal axis perpendicular to the vertical axis, and capable of closely contacting the first and second hubs, respectively.

The first group hub including the first through fourth hubs may further include a second group hub including the fifth through eighth hubs and a second group hub including the fourth through eighth hubs, And may be arranged sequentially with respect to the longitudinal axis.

The cross section of the shaft body in the direction perpendicular to the longitudinal axis may be a polygonal shape, and the cross-sectional shape of the first and second hubs facing each other may be a polygonal shape.

And an impeller coupled to the shaft body and formed in a direction perpendicular to the longitudinal axis.

Also, the impeller may be located either above or below the first and second hubs.

And a pressure sensor formed on one side of the shaft body and electrically connected to the processor through the shaft body.

According to at least one of the embodiments of the present invention, since the rotation radius of the hub due to the rotation of the mixing shaft is smaller than that of the conventional impeller, the agitation of the stirring object is performed regardless of the width of the water tank or the like can do. Further, since the hub in which the blades are formed can be detached from the shaft main body, the user can adjust the agitating property according to the viscosity, the height, etc. of the stirring object, and the hub can be easily replaced, added or removed.

Further scope of applicability of the present invention will become apparent from the following detailed description. It should be understood, however, that the detailed description and specific examples, such as the preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art.

1 is a cross-sectional view of an agitator according to an embodiment of the present invention,
Figures 2 to 10 illustrate various examples of shafts in accordance with one embodiment of the present invention,
11 to 14 are diagrams for explaining a method of controlling the rotation speed of the motor in accordance with the pressure sensor.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

The use of the terms "comprising" or "having" in this application is intended to specify the presence of stated features, integers, steps, operations, elements, parts, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

Even if there is no corresponding symbol in the specific drawing described in the present application, if there is a corresponding symbol in the previously described drawing, it can be described by indicating it.

1 is a cross-sectional view of an agitator according to an embodiment of the present invention. 1, the stirrer 100 includes a main body 10, a motor 20, a speed reducer 30, an output shaft 40, a drive shaft 50, a coupler 60, a mixing shaft 70, a processor Not shown). The mixing shaft 70 may include a shaft body 80, a hub 90, and the like.

A motor 20 may be disposed above the agitator main body 10. The motor 20 can receive rotational power from outside and generate rotational motion. And a speed reducer 30 coupled to the pinion of the motor 20 to increase the rotational force may be disposed below the motor 20. A driving shaft 50 may be connected to an end of the output shaft 40 of the speed reducer 30. A coupler 60 may be disposed at the distal end of the drive shaft 50 and the coupler 60 may connect the drive shaft 50 and the mixing shaft 70. Therefore, the rotational force generated in the motor 20 can be transmitted to the mixing shaft 70 through the drive shaft 50. [ A processor (not shown) may control the speed of the motor, as detailed in Figures 11-14.

The mixing shaft will be described in detail below.

2 to 3 show an example of a mixing shaft according to an embodiment of the present invention, in which the shaft body 80 has a circular section.

Referring to FIG. 2, the mixing shaft 70 may include a shaft body 80, a hub 90, and a plurality of blades 91. The hub 90 is attached to the outer surface of the shaft body 80 and is engageable with the shaft body 80. A plurality of blades 91 may be formed on the outer surface of the hub 90. Each of the plurality of blades 91 may be spirally formed and protrude outwardly of the hub 90. Therefore, when the mixing shaft 80 rotates in the object to be stirred, the hub 90 also rotates, so that stirring of the object to be stirred can be performed by the plurality of blades 91.

Referring to FIG. 3, the hub 90 may include a first hub 90-1 and a second hub 90-2. Since the transverse axial section of the shaft main body 80 is circular, the central portions of the transverse axial cross sections of the first and second hubs 90-1 and 90-2 may each have a semicircular shape.

Also, the facing surfaces of the first and second hubs 90-1 and 90-2 may be symmetrical with respect to the longitudinal axis. A groove 92 may be formed on one surface of the first hub 90-1 opposite to one surface of the second hub 90-2. A magnet 93 may be inserted and fixed to the groove 92. This is also the case with the second hub 90-2, and each of the grooves 92 has the same position when the first and second hubs 90-1 and 90-2 are opposed to each other, . Therefore, the first and second hubs 90-1 and 90-2 can be coupled to each other by the attraction force between the fixed magnets 93 embedded therein. Further, since the force greater than the attractive force between the magnets 93 is applied, the first and second hubs 90-1 and 90-2 may be separated from each other.

Further, each of the first and second hubs 90-1 and 90-2 may have a larger diameter in the vertical axis direction. That is, in the case of each of the first and second hubs 90-1 and 90-2, the diameter at the lower portion may be larger than the diameter at the upper portion.

2 to 3, the shaft main body 80 has a circular cross section, but the present invention is not limited thereto. Therefore, the shaft main body 80 may have an elliptical cross section.

3, the square-shaped groove 92 and the magnet 93 are shown, but the present invention is not limited thereto. Therefore, the groove may be a rectangular shape elongated in the longitudinal direction, and the magnet may have the same shape. In addition, the grooves may have a triangular shape corresponding to the facing surfaces of the first and second hubs 90-1 and 90-2, and the magnets may have the same shape. The coupling force of the first and second hubs 90-1 and 90-2 can be increased by the shape of the groove and the magnet so that even if the shaft body 80 rotates at a high speed, (90-1, 90-2) can be prevented from being separated by the centrifugal force.

2 to 3, a handle may be formed on the outer surfaces of the first and second hubs 90-1 and 90-2, respectively. Therefore, the user can easily separate the first and second hubs 90-1 and 90-2, and the first and second hubs 90-1 and 90-2 are disposed at desired positions of the shaft main body 80, Can be easily attached.

4 to 6 show another example of the mixing shaft according to an embodiment of the present invention, wherein the shaft body 180 has a rectangular cross section. Hereinafter, the description of the parts overlapping with the above description will be omitted.

Referring to FIG. 4, the shaft body 180 may be a square pillar. That is, the cross-section of the shaft body 180 in the transverse direction may be a square.

In this case, as shown in Fig. 5, the center portions of the first and second hubs 190-1 and 190-2 in the horizontal direction may each have a right angle. Fig. 6 is a top view of the shape in which the first and second hubs 190-1 and 190-2 are combined. Accordingly, when the first and second hubs 190-1 and 190-2 are coupled, a square hole 95 as shown in FIG. 6 can be formed. The cross section of the hole 95 formed by coupling the first and second hubs 190-1 and 190-2 may be the same as the cross section of the shaft body 180. [

Therefore, the first and second hubs 190-1 and 190-2 can be coupled to each other with the shaft body 180 as a center.

4 to 6, the shaft main body 180 has a rectangular cross section. However, the present invention is not limited thereto. Accordingly, the same description can be made in the case where the cross section of the shaft body 180 is pentagonal, hexagonal, or other polygonal.

By adopting such a shape of the mixing shaft, even if the shaft main body 180 rotates at a high speed, the first and second hubs 190-1 and 190-2 can be prevented from being separated by the centrifugal force.

7 to 10 show another example of a mixing shaft according to an embodiment of the present invention. Hereinafter, the description of the parts overlapping with the above description will be omitted.

Referring to FIG. 7, the mixing shaft 270 has four hubs coupled to one shaft body 80. That is, a first hub coupling body 290-1 to which the first and second hubs 90-1 and 90-2 are coupled, and a second hub coupling body (not shown) to which the third and fourth hubs 290-2 may be combined. The third and fourth hubs (not shown) may be the same as the first and second hubs 90-1 and 90-2 of FIG. 3 described above. In this case, the third and fourth hubs (not shown) are in close contact with the first and second hubs 90-1 and 90-2, respectively, and may be coupled by a magnet as described above.

In FIG. 7, the second hub coupling member 290-2 is coupled with the first hub coupling member 290-1 in a state where the second hub coupling member 290-2 is turned upside down. However, the present invention is not limited thereto. Therefore, the second hub coupling body 290-2 may be engaged with the first hub coupling body 290-1 without being turned upside down.

FIG. 8 shows a case in which the first and second hub assemblies 290-1 and 290-2 described in FIG. 7 are plural. 8, the first and second hub coupling members 290-1 and 290-2, the third and fourth hub coupling members 290-3 and 290-4, 5 and sixth hub couplings 290-5 and 290-6 may be disposed.

In addition, a predetermined distance D1 can be maintained between the second hub coupling body 290-2 and the third hub coupling body 290-3. This also applies to the distance D2 between the fourth hub coupling member 290-4 and the fifth hub coupling member 290-5. In this case, D1 and D2 may be the same distance, and in some cases, D1 and D2 may have a value of Zero, so that all of the hub assemblies may be adhered up and down.

Referring to FIG. 9, the mixing shaft 470 has a shape in which one shaft body 80 is coupled to the first and second hub assemblies 290-1 and 290-2, and one impeller 299 is combined. That is, one impeller 299 may be coupled to at least one of the upper and lower sides of the first and second hub assemblies 290-1 and 290-2. Therefore, in addition to the rotation of the first and second hub assemblies 290-1 and 290-2, the stirring of the stirring object can be performed by the rotation of the impeller 299. [

In this case, the impeller 299 may be coupled to the shaft body 80 in a conventional manner and may be coupled by a magnet as described above.

On the other hand, the blade direction of the impeller 299 may be opposite to the blade direction of the second hub coupling member 290-2. The counterclockwise direction (for example, clockwise) of the stirring object due to the rotation of the second hub coupling member 290-2 and the convection direction of the stirring object due to the rotation of the impeller 299 are opposite (for example, counterclockwise) . Therefore, the stirring property of the stirring object can be further improved.

Meanwhile, since the impeller 299 generally has a pair of propeller type shapes, the pair of impellers may be represented by one impeller.

FIG. 10 shows a case where a plurality of impellers 299-1 through 299-3 are included in the mixing shaft 370 illustrated in FIG. Referring to FIG. 10, the first to third impellers 299-1 to 299-3 may be disposed along one shaft body 80. In FIG. In this case, a first impeller 299-1 is provided between the second and third hub couplings 290-2 and 290-3, and a second impeller 299-1 is provided between the fourth and fifth hub couplers 290-4 and 290-5. The second impeller 299-2, and the third impeller 299-3 at the lower end of the sixth hub coupling body 290-6.

11 to 14 are diagrams for explaining a method of controlling the rotation speed of the motor in accordance with the pressure sensor. Hereinafter, the description of the parts overlapping with the above description will be omitted.

11 to 12, the position where the pressure sensor 96 is disposed will be described.

The pressure sensor 96 may be disposed at the distal end of the shaft body 80 as shown in FIG. 11 and may be disposed at one side of the shaft body 80 as shown in FIG. The pressure sensor 96 measures the pressure at the attached position, and is widely known as to its principle and kind.

13 to 14, the control of the rotational speed of the mixing shaft 770 will be described in accordance with the amount of the stirring object.

In Fig. 13, there is an object to be stirred corresponding to about half of the water tank, while in Fig. 14, there is an object to be stirred enough to almost fill the water tank. In this case, the pressure sensor 96 can sense the pressure when the height of the object to be stirred is H1, and the pressure when the height of the object to be stirred is H2. That is, P2 is larger than P1.

Here, the pressure sensor 96 may be electrically connected to the processor (not shown) through the shaft body 870 and the drive shaft (50 in FIG. 1). Accordingly, a signal corresponding to the magnitude of the pressure sensed by the pressure sensor 96 may be transmitted to a processor (not shown).

The processor (not shown) may then control the motor (20 in FIG. 1) to maintain the rotational speed V1 of the mixing shaft 770 corresponding to the size of the sensed P1. Similarly, a processor (not shown) may control the motor (20 in FIG. 1) to maintain the rotational speed V2 of the mixing shaft 870 corresponding to the size of the sensed P2.

The rotational speed of the mixing shafts 770 and 870 can be automatically controlled by the pressure sensor 96. [

The foregoing detailed description should not be construed in all aspects as limiting and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

100: stirrer 10: main body
20: Motor 30: Reducer
40: output shaft 50: drive shaft
60: Coupler 70: Mixing shaft
80: shaft body 90: hub

Claims (9)

1. A mixing shaft for a stirrer used in connection with a stirrer including a motor and a processor for controlling a rotation speed of the motor,
A shaft body;
First and second hubs detachably mounted on both sides of the shaft body and symmetrical with respect to a longitudinal axis of the shaft body;
Third and fourth hubs symmetrical to the first and second hubs, respectively, with respect to a horizontal axis perpendicular to the vertical axis, the fourth hub and the fourth hub being in close contact with the first and second hubs, respectively; And
And a plurality of blades formed in a spiral shape on outer surfaces of the first to fourth hubs, respectively. The method according to claim 1,
The first and second hubs
Wherein a diameter of the mixing shaft increases toward one direction of the longitudinal axis. The method according to claim 1,
The first and second hubs
A groove formed at the same position on each of opposing surfaces; And
And a magnet disposed in the groove and coupled to the mixing shaft. delete The method according to claim 1,
Further comprising fifth to eighth hubs of the same shape as the first to fourth hubs,
Wherein the first group hub including the first through fourth hubs is disposed sequentially with respect to the second group hub including the fifth through eighth hubs and the longitudinal axis. The method according to claim 1,
Wherein a cross section of the shaft body in a direction perpendicular to the longitudinal axis is a polygonal shape,
Wherein the shape of the cross section of the first and second hubs facing each other in the vertical direction is the shape of the polygonal shape. The method according to claim 1,
And an impeller coupled to the shaft body and formed in a direction perpendicular to the longitudinal axis. 8. The method of claim 7,
The impeller
Wherein the first and second hubs are located on either the upper side or the lower side of the first and second hubs. The method according to claim 1,
Further comprising a pressure sensor formed on one side of the shaft body and electrically connected to the processor through the shaft body.

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