JP2021164193A - Cooling unit of linear motor, linear motor, and manufacturing method of the linear motor - Google Patents

Abstract

To provide a technique capable of reducing a manufacturing cost of a cooling unit of a linear motor.SOLUTION: A cooling unit of a linear motor, is a cooling unit for cooling a coil so as to be adhered to the coil structuring the linear motor, comprising: a first flat member; and a second flat member 22 paralleled to the first flat member. Projections 20d and 20e projected toward the second flat member 22 are formed on a face of the first flat member opposite to the second flat member 22. A flow channel 30 is formed between the first flat member and the second flat member 22. The projections 20d and 20e are jointed to the second flat member 22 in the flow channel 30. In a cross section orthogonal to a direction where the first flat member and the second flat member 22 are arranged in paralleled and passing the flow channel 30, the projections 20d and 20e are provided in an island shape.SELECTED DRAWING: Figure 6

Description

The present invention relates to a linear motor cooling unit, a linear motor, and a method for manufacturing a linear motor cooling unit.

As a cooling unit for cooling the coil of a linear motor, a cooling unit having a flat plate-shaped cooling portion through which a refrigerant flows is known. For example, conventionally, a cooling unit of a linear motor has been proposed in which four cooling units are connected in a box shape to surround a coil and cool a coil that generates heat (Patent Document 1).

Japanese Unexamined Patent Publication No. 2011-200098

The present invention has been made in such a situation, and one of the exemplary objects of the embodiment is to provide a technique capable of reducing the manufacturing cost of a cooling unit of a linear motor.

In order to solve the above problems, the cooling unit of the linear motor according to the present invention is a cooling unit for cooling the coil in close contact with the coil constituting the linear motor, and the first flat plate member and the first flat plate member are used. A second flat plate member arranged in parallel with the first flat plate member is provided. A protrusion protruding toward the second flat plate member is formed on the surface of the first flat plate member facing the second flat plate member, and a flow path is formed between the first flat plate member and the second flat plate member. , It is joined to the second flat plate member in the flow path, the first flat plate member and the second flat plate member are orthogonal to each other in the direction in which they are arranged side by side, and the protrusions are provided in an island shape in the cross section passing through the flow path. There is.

Another aspect of the present invention is a linear motor. This linear motor includes the cooling unit of the above-mentioned linear motor, and the cooling unit holds the coils on both sides between the coils arranged so as to face each other.

Another aspect of the present invention is a method of manufacturing a cooling unit of a linear motor. This method is a method of manufacturing a cooling unit for cooling the coil in close contact with the coil constituting the linear motor, and the cooling unit is arranged side by side on the first flat plate member and the first flat plate member. 2 includes a flat plate member. In this manufacturing method, a step of forming a protrusion on the surface of a first flat plate member facing the second flat plate member by drawing, a step of forming a second flat plate member, and a first flat plate member and a second flat plate member are provided. , The process of arranging them side by side so that a flow path is formed between them and joining the outer periphery by welding, and joining the protrusion of the first flat plate member protruding into the flow path and the second flat plate member by spot welding. Including the process of welding.

It should be noted that any combination of the above components and those in which the components and expressions of the present invention are mutually replaced between methods, devices, systems and the like are also effective as aspects of the present invention.

According to the present invention, the manufacturing cost of the cooling unit of the linear motor can be reduced.

It is a perspective view which shows the cooling unit of the linear motor which concerns on embodiment. It is a perspective view of the flat plate cooling part of FIG. It is an exploded perspective view of the flat plate cooling part of FIG. It is a side view which looked at the flat plate cooling part of FIG. 1 from the 1st flat plate member side. FIG. 4 is a cross-sectional view taken along the line AA of FIG. FIG. 5 is a cross-sectional view taken along the line BB of FIG. It is a manufacturing process diagram which shows the process of manufacturing a cooling unit. 8 (a) to 8 (c) are cross-sectional views of the flat plate cooling portion according to the modified example.

Hereinafter, the same or equivalent components, members, and processes shown in the drawings shall be designated by the same reference numerals, and redundant description will be omitted as appropriate. In addition, the dimensions of the members in each drawing are shown enlarged or reduced as appropriate for easy understanding. In addition, some of the members that are not important for explaining the embodiment in each drawing are omitted and displayed.

FIG. 1 is a perspective view showing a linear motor 2 in which the cooling unit 10 according to the embodiment is used. The linear motor 2 includes a plurality of rectangular plate-shaped coils 4 arranged side by side in a predetermined direction, a plurality of N-pole magnets and a plurality of S-pole magnets which are alternately arranged side by side and face the coils 4. (Not shown) and. In the present embodiment, the cooling unit 10 is interposed between the coils 4 facing each other (that is, arranged in two rows) and holds the coils 4 on both sides. When the coil 4 is energized, an electromagnetic force is generated between the N-pole magnet and the S-pole magnet, and the electromagnetic force causes the coil 4 to move relative to the magnet together with the cooling unit 10.

The cooling unit 10 cools the coil 4 and suppresses the temperature rise thereof. The cooling unit 10 includes a flat plate cooling unit 12 for holding the coil 4, an inflow unit 14 provided on one end side of the coils 4 in the parallel arrangement direction, and an outflow unit 16 provided on the other end side.

2 to 5 show the flat plate cooling unit 12. FIG. 2 is a perspective view of the flat plate cooling unit 12. FIG. 3 is an exploded perspective view of the flat plate cooling unit 12. FIG. 4 is a side view of the flat plate cooling unit 12 as viewed from the first flat plate member 20 side. FIG. 5 is a cross-sectional view taken along the line AA of FIG.

The flat plate cooling unit 12 includes a first flat plate member 20, a second flat plate member 22, and a frame member 24. The first flat plate member 20, the second flat plate member 22, and the frame member 24 are made of metal such as SUS.

The first flat plate member 20 is a rectangular flat plate. The second flat plate member 22 is a rectangular flat plate having the same size as the first flat plate member 20. The frame member 24 is a frame member having substantially the same outer peripheral shape as the first flat plate member 20 and the second flat plate member 22. The frame member 24 can also be regarded as a flat plate member having one large opening 24a. The first flat plate member 20, the frame member 24, and the second flat plate member 22 are laminated in this order, and the entire outer periphery is joined as described later. Inside the flat plate cooling unit 12, the surface 20a of the first flat plate member 20 facing the second flat plate member 22, the surface 22a of the second flat plate member 22 facing the first flat plate member 20, and the opening 24a of the frame member 24 A flow path 30 surrounded by the peripheral surface 24b of the above is formed.

A circular inflow port 20b penetrating the flat plate surface is formed on one end side in the longitudinal direction (left side in FIG. 4) and one end side in the lateral direction (upper side in FIG. 4) of the first flat plate member 20. There is. Further, a circular outlet 20c penetrating the flat plate surface is formed on the other end side of the first flat plate member 20 in the longitudinal direction (right side in FIG. 4) and one end side in the lateral direction. The inflow port 20b and the outflow port 20c are located inside the opening 24a in a side view, respectively. Therefore, the inflow port 20b and the outflow port 20c communicate with the flow path 30, respectively. For example, a refrigerant such as cooling water flows through the flow path 30. The inflow port and the outflow port may be formed on the second flat plate member 22.

On the surface 20a of the first flat plate member 20, a plurality of protrusions 20d and 20e protruding toward the second flat plate member 22 side are formed inside the opening 24a in a side view. On the surface 22a of the second flat plate member 22, a plurality of protrusions 22d and 22e protruding toward the first flat plate member 20 side are formed inside the opening 24a in a side view. The plurality of protrusions 20d and 20e and the plurality of protrusions 22d and 22e are provided symmetrically with respect to the frame member 24. Each of the plurality of protrusions 20d, 20e, 22d, 22e enters the opening 24a (that is, the flow path 30), and the corresponding (opposing) protrusions are joined to each other. In the present embodiment, the plurality of protrusions 20d, 20e, 22d, 22e, are formed by drawing. Therefore, when the flat plate member is viewed from the back, a recess is formed at a position corresponding to the protrusion.

The plurality of protrusions 20d and 22d are lined up in a line, respectively. The flow path 30 is divided into a first divided flow path 32a and a second divided flow path 32b by a plurality of protrusions 20d and 22d. That is, the plurality of protrusions 20d and 22d form a partition wall 36 that divides the flow path 30 into the divided flow paths. The flow path 30 may be divided into three or more divided flow paths by the plurality of protrusions 20d and 22d.

The plurality of protrusions 20e and 22e are provided in the flow path 30, and in the illustrated example, in the first divided flow path 32a. By joining the protrusions 20e and 22e in the flow path, it is possible to prevent the first flat plate member 20 and the second flat plate member 22 from being deformed by the pressure of the refrigerant flowing in the flow path 30. That is, the strength of the flat plate cooling unit 12 can be improved.

FIG. 6 is a cross-sectional view taken along the line BB of FIG. FIG. 6 is a cross section in which the first flat plate member 20 and the second flat plate member 22 are orthogonal to each other in the direction in which they are arranged side by side and pass through the flow path 30. In the cross section of FIG. 6, the plurality of protrusions 20d, 20e, 22d, 22e are provided in an island shape. Since the island-shaped protrusions 20d and 22d form the partition wall 36, the partition wall 36 is intermittent along the dividing flow paths 32a and 32b.

Returning to FIG. 1, the inflow portion 14 is formed in a rectangular parallelepiped shape. The inflow portion 14 is formed with an inflow port 14a having one end open on the upper surface and the other end open on the side surface. The inflow port 14a communicates with the inflow port 20b of the first flat plate member 20. That is, the inflow portion 14 and the flow path 30 of the flat plate cooling portion 12 communicate with each other.

The outflow portion 16 is formed in a rectangular parallelepiped shape like the inflow portion 14. Similar to the inflow section 14, the outflow section 16 is formed with an outflow port 16a having one end open on the upper surface and the other end open on the side surface. The outlet 16a communicates with the outlet 20c of the first flat plate member 20. That is, the outflow portion 16 and the flow path 30 of the flat plate cooling portion 12 communicate with each other.

When the refrigerant flows into the inflow port 14a of the inflow section 14, the refrigerant flows into the flat plate cooling section 12 through the inflow port 20b, flows through the first divided flow path 32a and the second divided flow path 32b, and passes through the outflow port 20c. It flows out from the flat plate cooling unit 12 and flows out from the outflow port 16a of the outflow unit 16.

The above is the basic configuration of the cooling unit 10. Next, a method of manufacturing the cooling unit 10 will be described.

FIG. 7 is a manufacturing process diagram showing a process of manufacturing the cooling unit 10. The step of manufacturing the cooling unit 10 includes a forming step 102, a flat plate cooling unit assembling step 104, and an overall assembling step 106.

The forming step 102 includes a first flat plate member forming step 110 for forming the first flat plate member 20, a second flat plate member forming step 112 for forming the second flat plate member 22, and a frame member forming step 114 for forming the frame member 24. The inflow portion forming step 116 for forming the inflow portion 14 and the outflow portion forming step 118 for forming the outflow portion 16 are included. In each step, a known processing technique may be used.

The first flat plate member forming step 110 includes a drawing process 120 for forming protrusions 20d and 20e by drawing. The second flat plate member forming step 112 includes a drawing process 122 for forming the protrusions 22d and 22e by drawing.

The flat plate cooling unit assembling step 104 includes an outer peripheral welding step 130 and a protrusion welding step 132. In the outer peripheral welding step 130, the frame member 24 is sandwiched between the first flat plate member 20 and the second flat plate member 22, and the entire outer periphery thereof is joined and sealed by welding. In the protrusion welding step 132, the corresponding protrusions of the first flat plate member 20 and the second flat plate member 22 are joined by spot welding.

In the overall assembly step 106, the cooling unit 10 is assembled using the flat plate cooling unit 12 and other members that have undergone the flat plate cooling unit assembly step 104.

The manufacturing process diagram of FIG. 7 is merely an example, and other processes may be added, some processes may be changed or deleted, or the order of the processes may be changed.

The above is the manufacturing method of the cooling unit 10. Next, the effects of the present embodiment will be described.

When the flow path is formed by a non-island-shaped protrusion, for example, a protrusion connected to the peripheral surface 24b of the opening 24a of the frame member 24, the flow path that can be formed is limited. On the other hand, in the present embodiment, since the divided flow paths are formed by the protrusions 20d and 22d provided in an island shape, the divided flow paths that can be formed are not particularly limited, and the divided flow paths can be freely formed. As a result, the refrigerant can be distributed throughout the flow path 30, and the cooling performance of the cooling unit 10 can be improved. Further, when forming a plurality of divided flow paths, the divided flow paths may be divided from the middle of the flow path 30, so that one inflow port and one outflow port to the flat plate cooling unit 12 are sufficient. Therefore, the inflow unit is sufficient. The shape of the 14 and the outflow portion 16 can be simplified, and as a result, the manufacturing cost of the cooling unit 10 can be reduced.

Further, in the present embodiment, the island-shaped protrusions 20e and the protrusions 22e are joined in the flow path. As a result, it is possible to prevent the first flat plate member 20 and the second flat plate member 22 from being deformed by the pressure of the refrigerant flowing in the flow path 30. That is, the strength of the flat plate cooling unit 12 can be improved. Since the protrusions 20e and 22e are island-shaped, the influence of providing them on the flow of the refrigerant can be suppressed to a small extent.

Further, according to the present embodiment, since the protrusions are formed by drawing, for example, a flat plate member having protrusions can be formed at a lower cost than in the case of forming a flat plate member together with the protrusions by casting. Further, when the protrusion is formed by drawing, a recess is formed on the back side of the protrusion. That is, an embossed protrusion is formed. In this case, the protrusions are as thin as the rest of the flat plate member. In other words, the protrusions are formed relatively thin. As a result, the protrusions can be easily and surely joined by spot welding.

Further, according to the present embodiment, the corresponding protrusions of the first flat plate member 20 and the second flat plate member 22 are joined to each other. That is, protrusions are formed on both the first flat plate member 20 and the second flat plate member 22. These protrusions are particularly formed by drawing. Therefore, both the first flat plate member 20 and the second flat plate member 22 have embossed protrusions, that is, embossed portions, and the strength of both the first flat plate member 20 and the second flat plate member 22 is improved.

Further, conventionally, since the flat plate cooling unit 12 is assembled by using heat diffusion joining, which is a relatively high cost joining method, the manufacturing cost of the cooling unit 10 is relatively high. According to this embodiment, since the flat plate cooling unit 12 is assembled by welding, which is a relatively low-cost joining method, the manufacturing cost of the cooling unit 10 can be reduced.

The cooling unit according to the embodiment has been described above. This embodiment is an example, and it is understood by those skilled in the art that various modifications are possible for each of these components and combinations of each processing process, and that such modifications are also within the scope of the present invention. be. A modified example is shown below.

(Modification example 1)
In the embodiment, the case where the flat plate cooling unit 12 is composed of three members, the first flat plate member 20, the second flat plate member 22, and the frame member 24, has been described, but the present invention is not limited to this. For example, the flat plate cooling unit 12 may be composed of two members, a first flat plate member and a second flat plate member. In this case, the first flat plate member 20 and the frame member 24 of the embodiment may be combined to form the first flat plate member. Alternatively, a combination of the second flat plate member 22 and the frame member 24 may be formed as the second flat plate member.

(Modification 2)
In the embodiment, the case where the protrusion formed on the surface 20a of the first flat plate member 20 and the protrusion formed on the surface 22a of the second flat plate member 22 are joined has been described, but the present invention is not limited thereto. 8 (a) to 8 (c) are cross-sectional views of the flat plate cooling unit 12 according to the modified example. 8 (a) to 8 (c) all correspond to FIG. In FIG. 8A, the protrusions 20d and 20e of the first flat plate member 20 and the surface 22a (that is, the flat surface) of the second flat plate member 22 are joined. In FIG. 8B, the protrusions 22d and 22e of the second flat plate member 22 and the surface 20a (that is, the flat surface) of the first flat plate member 20 are joined. In FIG. 8C, the protrusion 20d of the first flat plate member 20 and the surface 22a of the second flat plate member 22 are joined, and the protrusion 22e of the second flat plate member 22 and the surface 20a of the first flat plate member 20 are joined. ing.

For example, the protrusion may be provided only on the surface 20a of the first flat plate member 20, and the protrusion may not be provided on the surface 22a of the second flat plate member 22. Further, for example, the protrusion may be provided only on the surface 22a of the second flat plate member 22, and the protrusion may not be provided on the surface 22a of the first flat plate member 20. In these cases, only one of the first flat plate member 20 and the second flat plate member 22 needs to be drawn, so that the manufacturing cost can be reduced.

(Modification example 3)
In the embodiment, the case where the cooling unit 10 is interposed between the opposing coils 4 and holds the coils 4 on both sides has been described, but the present invention is not limited to this. The cooling unit 10 may include two flat plate cooling units 12 and hold the coil 4 with the coil 4 in which the two flat plate cooling units 12 are lined up in a row.

Any combination of the embodiments and modifications described above is also useful as an embodiment of the present invention. The new embodiments resulting from the combination have the effects of the combined embodiments and variants.

4 coil, 10 cooling unit, 12 flat plate cooling part, 20 1st flat plate member, 20d, 20e protrusion, 22 2nd flat plate member, 22d, 22e protrusion, 30 flow path.

Claims (6)

A cooling unit for cooling the coil in close contact with the coil that constitutes the linear motor.
The first flat plate member and
A second flat plate member juxtaposed with the first flat plate member and
With
On the surface of the first flat plate member facing the second flat plate member, a protrusion protruding toward the second flat plate member is formed.
A flow path is formed between the first flat plate member and the second flat plate member.
The protrusion is joined to the second flat plate member in the flow path, and is joined to the second flat plate member.
A linear motor characterized in that the protrusions are provided in an island shape in a cross section that is orthogonal to the direction in which the first flat plate member and the second flat plate member are arranged side by side and passes through the flow path. Cooling unit. The protrusion constitutes a partition wall that divides the flow path into a plurality of divided flow paths.
The cooling unit for a linear motor according to claim 1, wherein the partition wall is provided intermittently along the divided flow path. A protrusion protruding toward the first flat plate member is formed on the surface of the second flat plate member that fits the first flat plate member.
The cooling unit for a linear motor according to claim 1 or 2, wherein the protrusion of the first flat plate member and the protrusion of the second flat plate member are joined. Further including a frame member sandwiched between the first flat plate member and the second flat plate member,
The cooling unit for a linear motor according to any one of claims 1 to 3, wherein the protrusion of the first flat plate member enters the opening of the frame member. The linear motor cooling unit according to any one of claims 1 to 4 is provided.
The cooling unit is a linear motor characterized in that the coils on both sides are held between the coils arranged so as to face each other. It is a method of manufacturing a cooling unit for cooling the coil in close contact with the coil constituting the linear motor.
The cooling unit includes a first flat plate member and a second flat plate member juxtaposed with the first flat plate member.
This manufacturing method is
A step of forming a protrusion on the surface of the first flat plate member facing the second flat plate member by drawing processing, and
The step of forming the second flat plate member and
A step of arranging the first flat plate member and the second flat plate member side by side so as to form a flow path between them, and joining the outer periphery by welding.
A method for manufacturing a cooling unit of a linear motor, which comprises a step of joining the protrusion of the first flat plate member protruding into the flow path and the second flat plate member by spot welding.

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