阅读说明：本技术 马达用定子的输送托盘 (Conveying tray of stator for motor ) 是由 藤原谦二 冈本吉弘 乾慎太郎 于 2020-11-12 设计创作，主要内容包括：本发明提供一种马达用定子的输送托盘(1),其使马达用定子搭载于输送机来进行输送,所述马达用定子具备：将多张环状的电磁钢板进行层叠而形成的芯部、以及被卷绕于以规定间隔形成于该芯部的内周部的多个插槽的线圈,在生产线上制造马达用定子时,能抑制模塑成型中的热损失并实现加热时间的缩短,并且也能实现模塑成型后的冷却时间的缩短。具备由输送机移送的平板状的主体(2),在主体(2)的中央部以沿着上下方向贯通的方式开设有开孔(21),并且,在主体(2)的位于开孔(21)的外侧位置的上表面(2a),以在开孔(21)的周向上隔开间隔的方式,设置有：在从开孔(21)的中心通过的放射方向的直线上延伸的多个隔热材料(3)。(The invention provides a conveying tray (1) of a stator for a motor, which carries the stator for the motor on a conveyor for conveying, wherein the stator for the motor comprises: a stator for a motor, which is manufactured on a production line, is provided with a core formed by laminating a plurality of annular electromagnetic steel sheets and a coil wound in a plurality of slots formed at predetermined intervals in the inner peripheral portion of the core, wherein the heating time can be shortened while suppressing heat loss during molding, and the cooling time after molding can also be shortened. The flat plate-shaped main body (2) is conveyed by a conveyor, a hole (21) is formed in the central part of the main body (2) in a mode of penetrating along the vertical direction, and an upper surface (2a) of the main body (2) positioned at the outer side position of the hole (21) is provided with intervals in the circumferential direction of the hole (21): and a plurality of heat insulating materials (3) extending on a straight line in the radial direction passing through the center of the opening (21).)

1. A motor stator conveying tray, which carries a motor stator on a conveyor for conveying, wherein the motor stator comprises: a core portion formed by laminating a plurality of annular electromagnetic steel sheets, and a coil wound in a plurality of slots formed at predetermined intervals in an inner peripheral portion of the core portion,

it is characterized in that the preparation method is characterized in that,

the motor stator conveyance tray includes: a flat plate-like body placed on the conveyor,

the central part of the main body is provided with a hole in a mode of penetrating along the vertical direction, and the upper surface of the main body at the outer side position of the hole is provided with a mode of spacing in the circumferential direction of the hole: a plurality of heat insulating materials extending on a straight line passing through the center of the opening in the radial direction.

2. The conveying tray of a stator for a motor according to claim 1,

the heat insulating material is disposed at equal intervals in the circumferential direction of the opening.

Technical Field

The present invention relates to a motor stator transport tray that carries a motor stator on a conveyor and transports the motor stator, wherein the motor stator includes: the coil includes a core portion formed by laminating a plurality of annular electromagnetic steel sheets, and a coil wound in a plurality of slots formed at predetermined intervals in an inner peripheral portion of the core portion.

Background

Conventionally, when a workpiece is manufactured as a product by sequentially performing processing, machining, and the like on a production line, a conveying tray is used to carry the workpiece on a conveyor and convey the workpiece. Various types of such a conveyance tray are known (for example, see patent document 1).

Further, the stator for a motor includes: a core portion formed by laminating a plurality of annular electromagnetic steel sheets, and coils wound in a plurality of slots formed at predetermined intervals in an inner peripheral portion of the core portion, wherein the stator for the motor is manufactured by performing processes in batches, and the present situation is that: the stator for the motor has not been manufactured on a production line. The stator for the motor is manufactured by molding as follows: and a molding process in which an insulating resin is injected at least into a gap between the core portion and the coil in a state in which the core portion is fitted into the cylindrical frame and the injection mold is inserted into the core portion, and the insulating resin is cured to mold the core portion. However, when the stator for the motor is molded, there are: the structure of the molding equipment is complex, and the molding time is long. The causes of these problems are considered to be: the stator for the motor cannot be manufactured by a production line.

Therefore, the present applicant is engaged in research and development to solve the above problems. In this process, the following problems have been found with respect to a transport tray that transports a motor stator by mounting the motor stator on a conveyor. That is, since the injection mold is placed on the transfer tray at the time of molding, heat for heating the motor stator is transmitted to the transfer tray through the injection mold, causing heat loss. As a result, it takes time to heat the motor stator to an appropriate temperature. Further, the conveying tray is also heated by heat generated when the motor stator is heated, and therefore, it takes time to cool the motor stator after molding.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2018-1390

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a motor stator conveyance tray capable of reducing heating time while suppressing heat loss during molding and reducing cooling time after molding when manufacturing a motor stator on a production line.

In order to solve the above problem, the present invention relates to a motor stator conveyance tray that conveys a motor stator mounted on a conveyor, the motor stator including: a core portion formed by laminating a plurality of annular electromagnetic steel plates, and a coil wound in a plurality of slots formed at predetermined intervals in an inner peripheral portion of the core portion, wherein the motor stator transport tray includes: a flat plate-like body placed on a conveyor, wherein a hole is formed in a central portion of the body so as to penetrate vertically, and an upper surface of the body located outside the hole is provided with: a plurality of heat insulating materials extending on a straight line passing through the center of the opening in the radial direction.

According to the invention, when the injection mould is loaded on the conveying tray, a plurality of heat insulation materials are clamped and arranged: the injection mold and the main body of the transfer tray. The heat insulating material can suppress: in the case where heat for heating the motor stator during molding is transmitted to the main body of the conveyance tray by the injection mold, it is possible to suppress: heat loss during molding. Accordingly, it is possible to realize: the heating time in molding is shortened. Further, when cooling is performed after molding, a refrigerant such as air can be circulated through the opening of the main body of the conveyance tray, and therefore, it is possible to realize: shortening the cooling time. Further, since the heat insulating material is not provided on the entire upper surface of the conveyance tray, the material cost required for manufacturing the heat insulating material can be reduced, which contributes to cost reduction of the conveyance tray.

In the present invention, it is preferable that the heat insulating material is disposed at equal intervals in a circumferential direction of the opening. Accordingly, the total weight of the motor stator and the injection mold can be equally divided by the respective heat insulating materials, and the state of placing the motor stator and the injection mold on the transfer tray becomes stable.

Drawings

Fig. 1(a) is a plan view showing an embodiment of a motor stator conveyance tray according to the present invention. (b) Is a sectional view taken along line A-A of the motor stator transport tray shown in (a).

Fig. 2 is a sectional view showing a state in which a motor stator is mounted on the conveyance tray of the motor stator shown in fig. 1(a) and (b) by an injection mold.

Description of the reference numerals

1 … conveying tray; 2 … a main body; 2a … upper surface; 21 … opening holes; 3 … heat insulating material; 5 … stator for motor; 51 … a core; 51a … slot; 52 … coil.

Detailed Description

Referring to fig. 1(a) and (b), a conveying tray 1 of a motor stator according to the present embodiment will be described. The conveyance tray 1 includes: a flat plate-like body 2 placed on a conveyor not shown. The body 2 is made of aluminum and has a planar shape of 12-sided polygon. An opening 21 is formed in the center of the main body 2 so as to penetrate in the vertical direction. The planar shape of the opening 21 is circular. Further, on an upper surface 2a of the body 2 located outside the opening 21, there are provided, at intervals in the circumferential direction: and a plurality of heat insulating materials 3 extending in a straight line in a radial direction passing through the center of the opening 21. The heat insulating material 3 is an epoxy glass mat, and the planar shape is a rectangle. Specifically, the heat insulating material 3 extends on a straight line connecting the center of the opening 21 and the midpoint of one side located at the outer peripheral edge position of the main body 2, and is disposed at intervals. That is, a total of 6 heat insulating materials 3 are arranged at equal intervals in the circumferential direction of the opening 21 on the upper surface 2a of the main body 2 located outside the opening 21. The heat insulating material 3 is fastened to the main body 2 by bolts and nuts. A part of a positioning portion, which will be described later, of an injection mold placed on the conveying tray 1 during molding is positioned: the portion of the upper surface 2a of the body 2, and the portion of the upper surface 2a is at: the heat insulating material 3 is located between one end edge on the side of the opening 21 and the outer peripheral edge of the opening 21.

In the transport tray 1, a pair of handles 4 and 4 are provided so as to face each other on the outer peripheral end portion of the upper surface 2a of the main body 2 and the portion where the heat insulator 3 is not provided. The handles 4, 4 are fastened to the main body 2 by bolts and nuts. Further, in the handles 4 and 4, the portion 41 that is suspended by a hook or the like provided in a suspension device such as a swing arm crane is located: the motor stator is not in contact with the handles 4 and 4 when the motor stator is placed on the transport tray 1 or removed from the transport tray 1 at a position outside the outer peripheral edge of the main body 2.

The conveying tray 1 is mounted on a conveyor and conveys a motor stator, but the conveying tray 1 also conveys an injection mold during molding. The conveyance state at this time will be described with reference to fig. 2. The motor stator 5 includes: a core 51 formed by laminating a plurality of annular electromagnetic steel sheets, a coil 52 wound in a plurality of slots 51a formed at predetermined intervals in the inner peripheral portion of the core 51, and a cylindrical frame 53. The core 51 is embedded in the frame 53 by shrink fit or the like.

The injection mold 6 is a hollow mold made of aluminum or the like, and includes: a long cylindrical body portion 61, and a flange portion 62 extending outward from one end in the longitudinal direction of the body portion 61. When the motor stator 5 is placed on the conveyance tray 1, the injection mold 6 is arranged such that the main body portion 61 faces upward and the flange portion 62 is horizontal. Then, the body portion 61 of the injection mold 6 is inserted into the core portion 51, and one end in the longitudinal direction of the frame 53 is placed on the flange portion 62 of the injection mold 6. In this state, the injection mold 6 is placed on the heat insulating material 3 of the conveyance tray 1, and the motor stator 5 is also placed on the conveyance tray 1.

Here, a positioning portion 63 is provided in a protruding manner at one end of the main body portion 61 of the injection mold 6 on the flange portion 62 side. The positioning portion 63 protrudes radially inward of the body portion 61, is bent downward of the flange portion 62, and is provided over the entire circumference of the inner circumferential edge of the body portion 61. In such a positioning portion 63, when the injection mold 6 is placed on the heat insulating material 3 of the transfer tray 1, a part of the positioning portion 63 is located: the remaining portion of the upper surface 2a of the main body 2 between the end edge on the side of the opening 21 of the heat insulating material 3 and the outer peripheral edge of the opening 21 is loosely fitted into the inner peripheral edge portion of the opening 21 of the main body 2. The position of the injection mold 6 and the motor stator 5 on the conveyance tray 1 is determined by the positioning and the loose fitting of the positioning portion 63. Further, since the heat insulating materials 3 are arranged at equal intervals in the circumferential direction of the opening 21, the total weight of the motor stator 5 and the injection mold 6 can be equally divided and received by the heat insulating materials 3, and the state of placing the motor stator 5 and the injection mold 6 on the transport tray 1 is stabilized. Further, the positioning portion 63 may not be provided over the entire inner peripheral edge of the body portion 61, but may be provided in an arc shape in plural numbers at intervals along the circumferential direction of the body portion 61.

The motor stator 5 placed on the conveying tray 1 together with the injection mold 6 is mounted on the conveyor, and is sequentially conveyed to: the molding is performed by a preheating station, a resin injection station, a resin curing station, and a cooling station provided from the upstream side to the downstream side of the production line. In the preheating station, an ac current is supplied to the coil 52 from an ac power supply, and the coil 52 generates heat during the power supply, and the heat at that time is conducted to the core 51 and the frame 53, and the body 61 and the flange 62 of the injection mold 6. As described above, since the injection mold 6 is placed on the heat insulator 3 of the transfer tray 1, the heat insulator 3 is interposed between the injection mold 6 and the main body 2 of the transfer tray 1. By interposing the heat insulator 3, it is possible to suppress: in the case where the heat for heating the motor stator 5 at the time of molding is transmitted to the main body 2 of the conveying tray 1 through the injection mold 6, it is possible to suppress: heat loss during preheating.

After preheating, once the transfer tray 1 is transferred to the resin injection station, the molten insulating resin is injected and filled into: and cavities 7a and 7b located between the frame 53 of the motor stator 5 and the injection mold 6 and formed at upper and lower end portions in the longitudinal direction of the main body 61. At this time, the resin is also injected into: a gap between the core 51 and the coil 52, a gap between the coils 52, or the like. After the filling of the insulating resin is completed, the conveyance tray 1 is conveyed to the resin curing station. In the resin curing station, the same heating process as in the preheating station is performed, and the motor stator 5 is heated together with the injection mold 6 to: the temperature at which the insulating resin is cured. When heating is performed in the resin curing station, heat loss can be suppressed as in the case of the above-described preheating. Accordingly, since the heating time can be shortened even in the resin curing station, it is possible to shorten: the total heating time taken when the stator 5 for the motor is molded.

When the insulating resin is cured and the conveyance tray 1 is conveyed to the cooling station, a refrigerant such as air is blown toward the frame 53 from the outside of the frame 53. Further, since the body portion 61 of the injection mold 6 is hollow and the opening 21 is formed in the body 2 of the conveyance tray 1, the refrigerant such as air can be caused to flow through the hollow portion 6a of the body portion 61 and the opening 21. That is, the refrigerant such as air can be made to flow from the hollow portion 6a toward the hole 21, or from the hole 21 toward the hollow portion 6 a. In this way, the motor stator 5 can be cooled not only from the outside but also from the inside, and therefore, the cooling time can be shortened.

In the transfer tray 1, the heat insulator 3 is not provided on the entire upper surface 2a, but is provided along the radial direction passing through the center of the opening 21, so that the material cost required for manufacturing the heat insulator 3 can be reduced, which contributes to cost reduction of the transfer tray 1.

The present invention has been described above with respect to one embodiment, but the present invention is not limited to the above embodiment. For example, the planar shape of the main body 2 and the openings 21 of the transport tray 1 may be arbitrary, and the planar shape and the number of the heat insulating materials 3 provided on the upper surface 2a of the main body 2 may be arbitrary. The material of the main body 2 and the heat insulator 3 is not particularly limited. Further, the main body portion 61 inserted into the core portion 51 in the injection mold 6 may be solid. In this case, the refrigerant such as air sent from the opening 21 cools the bottom of the main body portion 61, and the heat insulating material 3 forms a gap between the main body 2 of the conveying tray 1 and the flange portion 62, so that the refrigerant such as air can flow through the gap to cool the flange portion 62, thereby cooling the injection mold 6.