JPS6316991A - industrial robot - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an industrial robot.

BACKGROUND OF THE INVENTION In recent years, the demand for industrial robots has increased rapidly. The conventional industrial robot mentioned above will be explained below with reference to the drawings.

FIG. 3 is an overall configuration diagram of an industrial robot, which is said to be a horizontal articulated robot or a scalar type robot.

1 is a base on which the industrial robot body is fixed. 2
is a first joint portion that is attached to the base 1 and drives the joint of the first axis. 3 is a first arm rotatably attached to the first joint portion 2; Reference numeral 4 denotes a second joint portion that is attached to the first arm 3 and drives the joint of the second axis. 6 is a second arm rotatably attached to the second joint portion 4. A third joint 6 is attached to the second arm 6, includes a shaft 7 that moves up and down, and drives a third shaft.

8 is a motor that drives the first joint 2; 9 is a motor that drives the second joint 4; and 1o is a motor that drives the third joint 6.

With the above-described configuration, plane positioning is performed by the first joint part 2 and second joint part 4, and vertical positioning is performed by the third joint part 6.

Problems to be Solved by the Invention However, when an industrial robot with the above-mentioned configuration is made to continuously perform one operation, the motors 31, -7 8.9.10 generate heat. In the motors 9 and 10, air flows around the motors due to the rotation of the first arm 3, which has a heat dissipation effect. However, the first joint 2 to which the motor 8 is attached
Since the motor 8 is fixed, there is no air flow and there is a problem in that the heat radiation of the motor 8 is small.

In view of the above-mentioned problems, the present invention provides an industrial robot that has a motor heat dissipation effect.

Means for Solving the Problems In order to solve the above problems, the industrial robot of the present invention is provided with a chimney-shaped cover having ventilation holes around the outer periphery of the motor.

Function: The present invention provides a ventilated chimney-like cover around the outer periphery of the motor, thereby raising the air around the motor by convection, thereby enhancing the heat dissipation effect of the motor.

EXAMPLE An industrial robot according to an example of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first joint of an industrial robot according to an embodiment. 8 is a motor for driving the joint. 11 is
A rotation angle detector that detects the rotation angle of the motor 8.
A rotary encoder is used in the embodiment. Reference numeral 12 denotes a speed reducer that reduces the rotational output of the motor 8, and a harmonic drive is used in the embodiment. Reference numeral 13 denotes a bracket to which the motor 8 and the reduction gear 12 are attached, and is fixedly attached to the base 1. 14 is a drive shaft that transmits the output of the reducer 12 to the first arm 3 and is rotatably received by the bracket 13. Reference numeral 15 denotes a position detector for detecting the turning position of the 17th arm 3, which is connected to the drive shaft 14 via a coupling 16, and is fixedly attached to the bracket 13 via a flange 17.

Reference numeral 18 denotes a cover fixedly attached to the bracket 13 and provided with one ventilation hole 19 (see FIG. 2).

As described above, according to this embodiment, when the industrial robot is operated continuously, the temperature of the motor 8 rises, but the temperature of the motor 8 increases.

Since the covered cover 18 has a chimney shape, the motor 8
The surrounding hot air rises. Furthermore, the ventilation holes in the cover 18 facilitate the rise of air.

In this way, even if the motor 8 generates heat, by providing the chimney-shaped cover 18 with ventilation holes, the air around the motor 8 rises, thereby increasing the heat dissipation effect of the motor 8. According to this experiment, it was clear that there was a difference of 5°C to 10°C between when the cover 18 was provided and when it was not provided.

Effects of the Invention As described above, the present invention improves the heat dissipation effect of the motor by providing a chimney-shaped cover with ventilation holes on the motor of an industrial robot, and further protects the motor and rotation angle detector. It is possible to provide an industrial robot that also provides other effects.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a first joint of an industrial robot according to an embodiment of the present invention, FIG. 2 is a perspective view of a cover, and FIG. 3 is a front view of the industrial robot. 6, X-7・ 18...Cover, 19...Vent hole. Name of agent: Patent attorney Toshio Nakao and 1 other person18
-m-Cover Figure 3

Claims (1)

[Claims] A joint consisting of a motor that drives the joint, a rotation angle detector that detects the rotation angle of the motor, a reducer that reduces the rotation of the motor, and a position detector that rotates in conjunction with the output rotation of the reducer. An industrial robot equipped with a chimney-shaped cover provided with a ventilation hole around the outer periphery of the motor so as to dissipate heat.