JPH04340360A - Cooler of linear motor for automatic conveyer - Google Patents

Abstract

PURPOSE:To cool the armature winding of a linear motor for an automatic conveyer efficiently. CONSTITUTION:A linear motor for an automatic conveyer is composed of a stator 4 which is extended linearly and has an armature core 2 and an armature winding 3 and a carrier 7 which is constructed so as to be able to travel. Protrusions 10 which protrude from the bent parts 7a of both the sides of the carrier 7 toward the armature winding 3 are provided. Along with the travel of the carrier 7, the air inside the carrier 7 is stirred by the protrusions 10 to cool the armature winding 3.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for a linear motor that drives an automatic conveyance device for conveyance and handling in a machining line or the like.

0002

2. Description of the Related Art Automatic conveyance devices for conveying or handling parts are used in automobile production factories and the like. The automatic conveyance device includes a stator equipped with a stator core and an armature winding developed in a straight line along a line for conveying parts, and a traveling element configured to be able to travel and equipped with a movable side core facing the stator. It is equipped with a linear motor (linear synchronous motor or linear induction motor) consisting of and transports parts. Furthermore, the traveler is equipped with an arm, which is moved up and down by a servo motor, and a hand is provided at the tip of the arm, and the hand is operated using compressed air to handle parts.

FIG. 3 is a longitudinal sectional view of a conventional linear motor. The linear motor is movably supported via wheels 9 on a stator 4 consisting of a stator core 2 and an armature winding 3 fixed to a loader rail 1, and on rails 6 fixed on both sides of the loader rail 1. and a carrier 7 to which a moving side iron core 8 facing the armature winding 3 is attached. A certain gap exists between the stator 4 and the carrier 7. When a two-phase or three-phase alternating current is passed through the armature winding 3, a traveling magnetic field is generated. In the case of a linear synchronous motor, the carrier 7 is caused to travel by electromagnetic force between the traveling magnetic field generated by the armature winding 3 and the moving side iron core 8, which is a permanent magnet attached to the carrier 7. In the case of a linear induction motor, the magnetic flux generated from the armature winding 3 is transferred to the moving iron core 8 of the carrier 7.
An eddy current is generated to cause the carrier 7 to travel.

Conventionally, in the case of a self-propelled conveyor device using a single-sided linear induction motor, a large number of stators of unit size are arranged at regular intervals, and power is supplied to the armature winding only when moving a pallet. Therefore, cooling of the armature winding was not considered.

[0005]

[Problems to be Solved by the Invention] When a linear motor is applied to an automatic conveyance device, since current flows through the armature winding over the entire conveyance length, it is necessary to cool the armature winding.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cooling device that effectively cools the armature winding of a linear motor for an automatic transport device.

[0007]

[Means for solving the problem] A stator that includes a stator core and an armature winding, is developed in a straight line, and is fixed to a loader rail, and a carrier that is configured to be able to run opposite to the stator. The above object is achieved by providing a linear motor for an automatic conveyance device comprising a protrusion extending from the bent portions on both sides of the carrier toward the armature winding.

In the cooling device for a linear motor for an automatic conveyance device according to claim 1, the armature winding is molded with resin, the protrusion is fixed to two orthogonal surfaces of the bent portion of the carrier, and the tip If the portion is cut out, it is suitable for cooling the armature winding.

Furthermore, in the cooling device for a linear motor for an automatic transport device according to claim 1, protective covers are fixed to both sides of the loader rail so as to cover winding ends on both sides of the armature winding. It is suitable for cooling the armature winding if an opening is provided in the surface of the protective cover opposite to the projection fixed to the armature.

0010

[Operation] According to the present invention, protrusions are provided that protrude toward the armature winding from the bent portions on both sides of the carrier of a linear motor for an automatic transport device, and when the carrier moves, the air inside the carrier is agitated by the protrusions. The air cools the winding ends of the armature winding.

In addition, when the armature winding is protected by covering it with a protective cover, the protrusions extending toward the armature winding from the bent portions on both sides of the carrier prevent air from flowing out when the carrier moves. The agitated air is blown toward the armature winding through the opening in the protective cover to cool the winding ends of the armature winding.

0012

【Example】

Embodiment 1 FIG. 1 is a longitudinal sectional view of a linear motor for an automatic conveyance device equipped with a cooling device according to a first embodiment of the present invention. In FIG. 1, the same parts as in FIG. 3 are given the same numbers. A linear motor for an automatic transport device is equipped with a stator core 2 and an armature winding 3, is developed in a straight line, and is capable of running opposite to a stator 4 fixed to a loader rail 1. It is composed of a carrier 7. Insert the armature winding 3 into the slot of the stator core 2, and
It is molded with resin 5 to protect it. The cooling device according to the first embodiment of the present invention is provided with protrusions 10 extending toward the armature winding 3 from the bent portions 7a on both sides of the carrier 7. The protrusion 10 is made of iron and is fixed to two orthogonal surfaces of the bent portion 7a of the carrier 7 by welding or bolting, and has a notched tip. When the carrier 7 moves, the air inside the carrier 7 is stirred by the protrusion 10, and the air cools the end of the armature winding 3 as shown by the arrow.

Embodiment 2 FIG. 2 is a longitudinal sectional view of a linear motor for an automatic conveyance device equipped with a cooling device according to a second embodiment of the present invention. In FIG. 2, the same parts as in FIG. 1 are given the same symbols. A cooling device according to a second embodiment of the present invention includes protective covers 11 fixed to both sides of a loader rail 1 so as to cover winding ends on both sides of an armature winding 3 to protect the armature winding. An opening 11a is provided in the surface of the protective cover 11 facing the protrusion 10 fixed to the carrier 7. When the carrier 7 moves, the air inside the carrier 7 is stirred by the protrusion 10, and the air flows from the opening 11a to the protective cover 11 as shown by the arrow.
and cools the armature 3.

[0014]

According to the present invention, protrusions are provided that extend toward the armature winding from the bent portions on both sides of a linear motor for an automatic conveyance device, and when the carrier moves, the air inside the carrier is agitated by the protrusions. The air effectively cools the winding ends of the armature winding.

[0015] When the armature winding is protected by covering it with a protective cover, the air is agitated when the carrier moves due to the projections extending toward the armature winding from the bent portions on both sides of the carrier. Air is blown toward the armature winding through the opening in the protective cover to effectively cool the winding ends of the armature winding.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a linear motor for an automatic conveyance device equipped with a protection device according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a linear motor for an automatic conveyance device equipped with a protection device according to a second embodiment of the invention.

FIG. 3 is a longitudinal cross-sectional view of a conventional linear motor for an automatic conveyance device.

[Explanation of symbols]

2 Stator core 3 Armature winding 4 Stator 5 Resin 7 Career 7a　Bending section 8 Moving side iron core 10 Protrusion 11 Protective cover 11a Opening

Claims (3)

[Claims] Claim 1: An automatic motor vehicle consisting of a stator that includes an armature core and an armature winding, is developed in a straight line, and is fixed to a loader rail, and a carrier that is configured to be movable in opposition to the stator. 1. A cooling device for a linear motor for an automatic conveyance device, characterized in that the linear motor for an automatic conveyance device is provided with protrusions extending from bent portions on both sides of the carrier toward the armature winding. 2. A cooling device for a linear motor for an automatic transport device according to claim 1, wherein the armature winding is molded with resin, the protrusion is fixed to two perpendicular surfaces of the bent portion of the carrier, and A cooling device for a linear motor for an automatic conveyance device, characterized by having a cutout section. 3. The cooling device for a linear motor for an automatic transport device according to claim 1, further comprising protective covers fixed to both sides of the loader rail so as to cover winding ends on both sides of the armature winding, and the carrier 1. A cooling device for a linear motor for an automatic conveyance device, characterized in that an opening is provided in a surface of the protective cover that faces a protrusion fixed to the surface of the protective cover.