JP6770734B2 - Rotor separation type stirrer - Google Patents

Description

The present invention relates to a stirrer including a rotor to which a stirrer blade is attached and a rotor drive unit for rotationally driving the rotor, and is a rotor separation type stirrer in which the rotor is detachably held from the rotor drive unit.

As an interior finish of a building, a sheet-like wall covering made of various materials, so-called wallpaper, is attached to the wall surface. Normally, in the construction of this wallpaper, glue is applied to the back surface of the wallpaper at the site, and the wallpaper is sequentially attached to the wall surface. Conventionally, a wallpaper gluing machine has been used to apply glue to wallpaper. This wallpaper gluing machine is equipped with multiple rolls and glue tubs inside the main body, and while sending out the wall covering material drawn from the rear of the main body forward with various internal rolls, the back surface of the wall covering material comes into contact with the gluing roll in the middle. The glue in the glue tub is applied by allowing the glue to be applied.

The glue applied to the wall covering material is also prepared on-site and supplied to the wallpaper gluing machine. Generally, the paste-like glue is dissolved in a medium such as water in a container and stirred to prepare an appropriate concentration. For stirring in the preparation of such glue, one end of a shaft having a stirring blade at the other end is tightened and attached to the chuck portion of the handheld electric drill, and the stirring is performed in the container by the shaft rotation drive of the electric drill. In many cases, a simple stirrer is used to stir the glue by rotating the blades.

In addition, as another conventional glue liquid preparation device, a rotating shaft with a stirring blade is projected on the bottom surface of the container that holds the glue material and water, and an electric motor is placed inside the base at the bottom of the container to provide gears. A stirring device for preparing glue by rotating a stirring blade of a rotating shaft via a belt or the like is already on the market. However, the shielding effect of the shielding O-ring and the rubber packing was remarkably reduced, and the glue liquid of the object to be agitated sometimes leaked from the shielded portion between the rotating shaft and the container.

Therefore, in order to make it possible to arrange the rotor that rotates mechanically and the rotor drive unit that drives the rotor with a partition wall or the like in between, the rotor and the rotor drive unit that drives the rotor are opposed to each other with a gap. We have proposed a stirrer in which the object to be agitated does not leak from the container and there is no concern about malfunction or noise due to the drive of the gear by arranging the electric device (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2007-89249

This stirrer rotates on a rotor holding portion having a rotating shaft that rotates the stirring blades on a turntable that rotates according to the displacement of the rotating magnetic field inside the tub material, and a rotating shaft of the turntable that faces the rotating shaft. A stirrer in which rotor drive units that generate a rotating magnetic field with a center are arranged facing each other with a gap outside the tub material, and a large number of rotor drive units are arranged in a substantially concentric circle facing the turntable. Since the energization of each of the coils is controlled to induce and control the rotating magnetic field, there is no noise in the rotor drive unit itself, and the stirrer does not have to worry about noise.

There is no problem if the rotation holding part is installed on the bottom of the tub without any gap, but the rotor holding part is a turntable in which the permanent magnets facing the coil group arranged concentrically are arranged concentrically. Therefore, when the gap between the coil group and the permanent magnet is not constant, cogging tends to occur, and vibration / noise may occur due to long-term use.

That is, when dust or hardened glue remains on the bottom surface of the tub material and a gap is generated between the bottom surface of the tub material and the rotation holding portion, a difference occurs in the gap between the coil group and the permanent magnet, and this difference causes a difference. , The rotation of the turntable becomes uneven. Moreover, even if the bottom surface of the tub is horizontal, the rotation axis cannot be kept vertical due to the gap. For this reason, the rotation of the rotating shaft is likely to be shaken, and cogging that pulsates finely depending on the rotation angle is likely to occur. Due to this cogging, vibration and noise may be generated due to long-term use.

An object of the present invention is to obtain a stirrer which has high water stopping property and high quietness, achieves further weight reduction, and is less likely to cause cogging even after long-term use.

The rotor-separated stirrer according to the first aspect of the present invention has a stirring container that holds an object to be agitated inside, a cylindrical cup-shaped insertion recess formed in the center of the bottom surface of the stirring container, and the same. A rotor portion that is detachably inserted into the insertion recess, a stirring blade connected to the upper end portion of the rotor portion, and a rotor portion rotating means that rotates the rotor portion are provided.
The rotor portion is configured by arranging and fixing a large number of magnetic materials in parallel around an axis in an intermediate portion separated from both upper and lower ends by a predetermined distance.
The rotor portion rotating means
A large number of coil portions arranged side by side on the outer side of the insertion recess so as to face a large number of magnetic materials of the rotor portion inserted into the insertion recess.
Ri Do and a guidance magnetic field control means for guidance control of the rotating magnetic field by controlling the energization of each of a number of coil portions,
The rotor portion is rotatably supported in the insertion recess by using only two bearings.
The two bearings are a bottom bearing and an opening bearing.
The bottom bearing is arranged near the bottom wall of the insertion recess, and the tip end portion of the rotor portion is fitted.
The opening bearing is arranged in the vicinity of the opening of the insertion recess, and is attached to the bearing holding portion of the rotor portion at a position above the insertion recess.
The bearing holding portion is provided with a flange portion having a size of closing the opening of the insertion recess to be inserted, and the flange portion is fitted into the opening of the insertion recess together with the rotor portion and is detachably fixed. It is characterized by being a thing.

Rotor separator stirrer according to the invention described in claim 2 is characterized in that the two bearing according to claim 1 is a resin-made sliding bearing.

In the rotor-separated stirrer according to the third aspect of the invention, four of the two sets of the stirring blades of the stirring blades of the first aspect are bent upward, and the two sets of the stirring blades are formed. It is characterized by being bent downward .

The present invention has an effect that it is possible to obtain a stirrer having high water stopping property and high quietness, and further achieving weight reduction.

It is explanatory drawing which shows the cross-sectional structure of one Example of the rotor separation type stirrer of this invention. It is explanatory drawing which shows the cross-sectional structure in the state which removed the rotor of the stirrer of FIG. It is explanatory drawing which shows the plane structure of the rotor separation type stirrer of FIG. It is explanatory drawing which shows the structure of the rotor of the rotor separation type stirrer of FIG. 1, FIG. a is a front view, FIG. b is a sectional view, and FIG. c is a plan view. It is explanatory drawing which shows the structure of the main part of FIG. 1, FIG. a is a front view, FIG. b is a sectional view, and FIG. c is a sectional view in a state where a rotor is removed.

In the present invention, a stirring container that holds an object to be agitated inside, a cylindrical cup-shaped insertion recess formed in the center of the bottom surface of the stirring container, and a rotor that is detachably inserted into the insertion recess. A portion, a stirring blade connected to an upper end portion of the rotor portion, and a rotor portion rotating means for rotating the rotor portion are provided.

The rotor portion of the present invention is configured by arranging and fixing a large number of magnetic materials in parallel around an axis in an intermediate portion separated from both upper and lower ends by a predetermined distance, and the rotor portion rotating means is inserted into the insertion recess. Induction to induce and control the rotating magnetic field by controlling the energization of each of the large number of coil parts and the large number of coil parts arranged side by side on the outside of the insertion recess facing the large number of magnetic materials of the worn rotor part. It consists of a magnetic field control means.

With this configuration, it is possible to obtain a stirrer which has high water stopping property and high quietness, achieves further weight reduction, and is less likely to cause cogging even after long-term use. That is, as the rotor portion rotating means for rotating the rotor portion, since the energization of each of a large number of coil portions is controlled to induce and control the rotating magnetic field, there is no rotating mechanism penetrating the stirring container. It has high water stopping property because there is no possibility that the material to be agitated leaks from the agitating container.

Further, since a large number of coil portions surround the rotor portion that is rotated by a rotating magnetic field, there is no gear, and an object to be agitated covers the rotor portion, it has high quietness. Further, the drive source is only the rotor portion and the coil portion surrounding the rotor portion, and since there is no gear as described above, further weight reduction is achieved.

Further, since the rotor portion of the present invention is inserted into the cylindrical cup-shaped insertion recess, it is well indicated in the longitudinal axis direction of the cylindrical cup-shaped insertion recess, so that the rotor portion rotates with respect to the rotation center of the rotor portion. It is unlikely that motion blurring will occur. More preferably, since the rotor portion is rotatably supported in the insertion recess by the two bearings, the rotation blur is less likely to occur.

Specifically, the rotor portion is supported by arranging a bottom bearing near the bottom wall of the cylindrical cup-shaped insertion recess and another opening bearing near the opening of the cylindrical cup-shaped insertion recess. By eliminating the blurring of the rotor, the rotation of the rotating shaft of the rotor is less likely to be shaken, there is no cogging that pulsates finely depending on the rotation angle, and vibration and noise are less likely to occur even after long-term use. ..

More specifically, when mounting the opening bearing, the structure does not hinder the removal of the rotor portion. Therefore, in the embodiment described later, the opening bearing is attached to the position above the insertion recess of the rotor portion together with the bearing holding portion, and the bearing holding portion is detachably attached together with the rotor portion from the opening of the insertion recess to remove the bearing. It has a structure that does not hinder. That is, the bearing holding portion is provided with a flange portion having a size for closing the insertion recess, a protrusion is formed on a part of the flange portion, and a groove matching the shape of the flange portion is formed above the insertion recess. It can be fitted together with the rotor part.

Examples of the bearing of the present invention include a rolling bearing, a plain bearing, and the like. However, when the stirrer of the present invention prepares an adhesive such as glue, the bearing is dried if it is a rolling bearing. Since the balls and roller shafts may solidify at that time, a slide bearing is more preferably selected, and a resin slide bearing is more preferably selected.

Further, more preferably, the stirring blade of the present invention may be any one capable of stirring the object to be agitated in the stirring container by the water flow generated by the rotation of the rotor portion. Since the rotor portion of the present invention is detachably inserted into a cylindrical cup-shaped insertion recess formed in the center of the bottom surface of the stirring container, it is more preferably inserted by rotating the rotor portion. Anything that generates a force in the insertion direction of the recess may be used.

FIG. 1 is an explanatory view showing a cross-sectional configuration of an embodiment of the rotor separation type stirrer of the present invention. FIG. 2 is an explanatory view showing a cross-sectional configuration in a state where the rotor of the stirrer of FIG. 1 is removed. FIG. 3 is an explanatory view showing a planar configuration of the rotor separation type stirrer of FIG. 4A and 4B are explanatory views showing a configuration of a rotor of the rotor separation type stirrer of FIG. 1, FIG. 4A is a front view, FIG. 4B is a cross-sectional view, and FIG. 4C is a plan view. 5A and 5B are explanatory views showing the configuration of a main part of FIG. 1, FIG. 5A is a front view, FIG. 5B is a sectional view, and FIG. C is a sectional view in a state where the rotor is removed.

As shown in FIGS. 1 to 3, the stirrer 10 of this embodiment can be moved by a bucket-shaped stirring container 11 that holds an object to be agitated inside and four casters 13 that support the stirring container 11 and are below. It consists of a base 12. A housing portion 20 having a cylindrical cup-shaped insertion recess 21 is formed in the central portion of the bottom surface of the stirring container 11. A rotor portion 30 to which a stirring blade 36 is connected to an upper end portion is detachably inserted into the insertion recess 21.

As shown in FIGS. 4 and 5, the rotor portion 30 is inserted into the insertion recess 21 of the housing portion 20 to form a brushless motor. That is, a large number of permanent magnets 31 are juxtaposed and fixed around the axis of the rotor portion 30 at intermediate portions separated from the upper and lower ends thereof by predetermined distances.

On the other hand, in the housing portion 20, a coil portion 23 in which a coil is wound around a core material is provided on the outside of the insertion recess 21 so as to face a large number of permanent magnets 31 of the rotor portion 30 inserted in the insertion recess 21. As an arrangement of three sets of three-phase electromagnets arranged side by side, the rotor portion 30 is rotated by switching the phase of the electromagnets while detecting the position of the rotor portion 30 from the outside of the insertion recess 21.

The induced magnetic field control unit 26 arranged inside the same base 12 controls the energization of each of a large number of coil units 25 to generate a rotating magnetic field to rotate the rotor unit 30 in the insertion recess 21. .. The rotor unit 30 and the induced magnetic field control unit 26 serve as rotor unit rotating means. In this case, it is also possible to perform high-frequency sine wave control for rotation control of the rotor unit 30. Further, the torque limit is applied to the control of the rotating magnetic field of the rotor unit 30 by the induced magnetic field control unit 26 so that the rotation can be reduced and the overload state can be eliminated when agitating with a large load is performed.

Specifically, since the rotor portion 30 is rotated by a rotating magnetic field from the outside of the insertion recess 21, the insertion recess 21 itself is manufactured of SUS316 having a small magnetic force loss and having a wall thickness of 1 mm. A neodymium magnet was used as the permanent magnet 31 of the rotor portion, and a SUS316 wall thickness of 0.5 mm, which was rust-proof and had little magnetic force loss, was manufactured to cover the entire surface. A gap of 0.5 mm was secured between the insertion recess 21 and the rotor portion 30.

As described above, since the rotor portion 30 is rotated by a rotating magnetic field in which the energization of each of the numerous coil portions 25 is controlled, there is no rotating mechanism penetrating the stirring container 11, so that the object to be agitated is agitated. There is no risk of leakage from the container 11.

Further, since a large number of coil portions 25 surround the rotor portion 30 rotated by a rotating magnetic field, there is no gear, and an object to be agitated covers the rotor portion 30, it has high noise reduction. Further, as the drive source, only the rotor portion 30 and the coil portion 25 surrounding the rotor portion 30 are used, and since there is no gear as described above, further weight reduction is achieved at the same time.

Further, as shown in FIG. 5b, the rotor portion 30 is supported by two bearings, a bottom bearing 22 and an opening bearing 32, when the rotor portion 30 is inserted into the insertion recess 21. That is, the bottom bearing 22 is arranged near the bottom wall of the insertion recess 21, and the opening bearing 32 is arranged near the opening of the insertion recess 21. The bottom bearing 22 is a cylindrical resin slide bearing in which the tip end portion of the rotor portion 30 is fitted even when the rotor portion 30 is taken in and out.

The opening bearing 32 is not directly arranged in the insertion recess 21, but is attached to the bearing holding portion 33 attached to the insertion recess 21 together with the rotor portion 30. The opening bearing 32 has a cylindrical shape with a brim whose upper surface is larger than the outer diameter of the cylinder, and is a sliding bearing made of resin similar to the bottom bearing 22. The opening bearing 32 is held by the bearing holding portion 33, and the enlarged upper end surface of the brim abuts on the rotating plate 37 holding the six stirring blades 36 of the rotor portion 30 to hinder the rotation of the stirring blade 36. It is configured not to.

The bearing holding portion 33 is provided with a flange portion 34 having a size for closing the opening of the insertion recess 21 to be inserted, and the protrusion 35 is formed in a part of the flange portion 34. On the other hand, a fitting groove 23 that matches the shape of the flange portion 34 is formed in the opening of the insertion recess 21, and the flange portion 34 of the bearing holding portion 33 is matched with the fitting groove 23 to match the rotor portion 30. It is fitted together and fixed detachably.

In the stirrer 10 of this embodiment, the bottom bearing 22 and the opening bearing 32 are supported in the insertion recess 21. For this reason, the rotation of the rotation shaft of the rotor portion 30 is less likely to be shaken, cogging that pulsates finely depending on the rotation angle does not occur, and vibration and noise are less likely to occur even after long-term use.

The stirring blade 36 connected to the rotor portion 30 was devised so that the rotation shaft did not rise due to the vortex flow during rotation of the stirring blade 36. That is, the stirring blade 36 connected to the rotor portion 30 generates a force in the insertion direction of the insertion recess 21 by the rotation of the rotor portion 30. That is, three sets of six stirring blades 36 are arranged symmetrically with respect to the center of rotation on the stirring blades 36. Of the three sets of stirring blades 36, four sets of two sets of stirring blades 36 are bent upward, and the other two sets of stirring blades 36 are bent downward.

The rotor portion 30 is rotated by the rotor portion 30 of the rotor portion rotating means and the induced magnetic field control unit 26, and the stirring blade 36 is rotated to generate a water flow, but the four pieces 2 bent upward. Since the set of stirring blades 36 are in contact with the object to be agitated more than the set of two stirring blades 36 bent downward, a force can be generated in the insertion direction of the insertion recess 21.

Further, the rotor portion 30 is assumed to be attached and detached in water, and there is a high possibility that a solution is contained in the insertion recess 21 when the rotor portion 30 is inserted. Therefore, the liquid to be agitated in the insertion recess 21 or A central tube that passes through a part of the central axis of the rotor portion 30 from the side hole 38 at the tip of the rotor portion 30 so as to secure a path of the central axis of the rotor in order to discharge a liquid such as wash water to the upper part. Communication paths 38, 39, 40 were formed through the path 39 to the central hole 40 penetrating the central axis of the rotating plate 37 of the stirring blade 36.

As described above, the stirrer of this embodiment has the following effects.
(1) Since the rotor part is rotated by an external rotating magnetic field, there is no need to seal the rotating shaft of the stirrer, and there is no concern about water leakage.
(2) Since the stirring blade is directly attached to the rotor part, there are few mechanical parts and it is unlikely to break down. Further, it is also possible to perform high-frequency sine wave control for rotation control of the rotor portion, and there is no mechanism or electrical vibration, and an effect of excellent quietness is obtained.
(3) A neodymium magnet can be used for the rotor to create a highly efficient, lightweight and compact structure.

10 ... Stirrer,
11 ... Stirring container,
12 ... Base,
13 ... Caster,
20 ... Housing part,
21 ... Insertion recess,
22 ... Bottom bearing,
23 ... Fitting groove,
25 ... Coil part,
26 ... Inductive magnetic field control unit,
30 ... Rotor part,
31 ... Permanent magnet,
32 ... Opening bearing,
33 ... Bearing holder,
34 ... Tsuba,
35 ... protrusion,
36 ... Stirring blade,
37 ... Rotating plate,
38 ... Side hole (communication route),
39 ... Central canal (communication route),
40 ... Central hole (communication path),

Claims (3)

A stirring container that holds the object to be agitated inside,
A cylindrical cup-shaped insertion recess formed in the center of the bottom surface of this stirring container,
The rotor part that is detachably inserted into this insertion recess,
The stirring blade connected to the upper end of this rotor part,
It is provided with a rotor portion rotating means for rotating the rotor portion.
The rotor portion is configured by arranging and fixing a large number of magnetic materials in parallel around an axis in an intermediate portion separated from both upper and lower ends by a predetermined distance.
The rotor portion rotating means
A large number of coil portions arranged side by side on the outer side of the insertion recess so as to face a large number of magnetic materials of the rotor portion inserted into the insertion recess.
Ri Do and a guidance magnetic field control means for guidance control of the rotating magnetic field by controlling the energization of each of a number of coil portions,
The rotor portion is rotatably supported in the insertion recess by using only two bearings.
The two bearings are a bottom bearing and an opening bearing.
The bottom bearing is arranged near the bottom wall of the insertion recess, and the tip end portion of the rotor portion is fitted.
The opening bearing is attached to a bearing holding portion attached to the insertion recess together with the rotor portion.
The bearing holding portion is provided with a flange portion having a size of closing the opening of the insertion recess to be attached, and the flange portion is fitted into the opening of the insertion recess together with the rotor portion and fixed to be detachably fixed. rotor separator stirrer, characterized in that. The rotor-separated agitator according to claim 1 , wherein the two bearings are resin sliding bearings. The rotor separation type according to claim 1, wherein four or two sets of the stirring blades of the stirring blades are bent upward, and two sets of the stirring blades are bent downward. mixer.

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