DRIVE GUIDE APPARATUS

• US 20100060087A1
• Filed: 03/26/2008
• Published: 03/11/2010
• Est. Priority Date: 03/30/2007
• Status: Active Grant

• Current Assignee: THK Company Limited
• Original Assignee: THK Company Limited
• Inventors: Aso, Toshiyuki, Unno, Akihiro
• Granted Patent: US 9,088,201 B2
• Time in Patent Office: Days
• US Class Current: 310/12.290
• CPC Class Codes: H02K 41/02 Linear motors; Sectional motors
• CPC Class Codes: H02K 9/227 Heat sinks

Abstract

A drive guide device capable of effectively releasing heat produced by a mover. The drive guide device has a movement unit 100 moved by a linear motor while being guided by a rail 230. The movement unit 100 has the mover 140 to which electricity is conducted to produce a magnetic field, a table 110 placed on the mover 140 on the opposite side of a base 210 to which the rail 230 is fixed, a heat sink 130 having heat radiation fins for releasing heat produced by the mover 140 and placed between the mover 140 and the table 110, and a heat transmission route for transmitting heat, which cannot be released by the heat sink 130, to the table 110. The table 110 is made from a material having a low thermal expansion coefficient.

Claims

1. A drive guide apparatus having a movement unit which moves by being guided along a guide, by a linear motor,

the movement unit comprising:

a movable element for generating a magnetic field when energized, and

a table provided on the side opposite to a base to which the guide is fixed, of the movable element, and

the apparatus having, between the movable element and the table, a radiating structure for radiating heat generated by the movable element,

wherein a heat transmission route for transmitting heat which cannot be released in the radiating structure to the table is provided, and

the table is made of a material having a low thermal expansion coefficient.

2. The drive guide apparatus according to claim 1, wherein the radiating structure is constructed by a heat sink having a plurality of fins provided between the table and the movable element.

3. The drive guide apparatus according to claim 2, wherein the heat sink is fixed to the under face of the table, and

the heat transmission route is formed so as to pass a part where the heat sink is fixed.

4. The drive guide apparatus according to claim 1, wherein a thermal expansion coefficient of the table is 10.0×

(10−

6/K) or less.

5. The drive guide apparatus according to claim 1, wherein a black surface process is performed on the table.

6. The drive guide apparatus according to claim 2, wherein in the heat sink,

walls are formed in three places;

both ends in the width direction and a center portion,

the top face of each of the walls is fixed to the under face of the table, and

a plurality of fins shorter than the walls are provided between the walls in parallel with the walls.