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Horizontal articulated robot

a robot and horizontal technology, applied in the field of horizontal robots, can solve the problems of deteriorating responsiveness to movement and positioning precision, difficult to reduce the minimum radius rmin, and restricted miniaturization of the arm frame, so as to achieve the effect of reducing the increase in mass

Inactive Publication Date: 2012-11-08
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a horizontal articulated robot with a large mobility range and high responsiveness, while maintaining high positioning precision. The robot has a unique structure with a recessed portion in the first arm and a main shaft that enters into the recessed region of the first arm. The main shaft has a shorter minimum rotation radius than the first arm, which allows for a smaller movable range. The robot also includes a flexible connection system and a wiring duct for improved configuration flexibility and a better movable range.

Problems solved by technology

Accordingly, miniaturization of the arm frame is restricted, and it is thus difficult to reduce the minimum radius Rmin.
This can deteriorate responsiveness upon movement and positioning precision.

Method used

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Embodiment Construction

[0044]Embodiments of the invention will be described with reference to the drawings. Hereinafter, a horizontal articulated robot according to a first embodiment of the invention will be described in detail.

[0045]FIG. 1 shows a perspective structure of the horizontal articulated robot (a SCARA robot). FIG. 2 shows a top-surface structure of the SCARA robot.

[0046]As shown in FIG. 1, the SCARA robot includes a base 11 as a supporting member disposed on a floor or the like. At an upper end portion of the base 11 is provided a connection shaft 12 that rotatably supports a base end portion of a first arm 13, as a rotating member. The connection shaft 12 is formed in a cylindrical shape with an axial center C1 and is provided rotatably around the axial center C1 on the base 11. The connection shaft 12 is rotated forward or backward by a first motor M1 provided in the base 11. Thereby, the first arm 13 rotates around the axial center C1 of the connection shaft 12 rotated by the first motor ...

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Abstract

A horizontal articulated robot includes a base, a first arm provided rotatably around a first rotation axis on the base, a second arm provided rotatably around a second rotation axis on the first arm, the second rotation axis being parallel to the first rotation axis, and a main shaft provided in the second arm to be extended in a direction parallel to the second rotation axis. A distance between the second rotation axis and the main shaft is shorter than a length of a straight line connecting the first and the second rotation axes. Additionally, the first arm has a recessed portion formed so as to include a position on a rotation path where a rotation radius around the second rotation axis is equivalent to the distance between the second rotation axis and the main shaft.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of U.S. patent application Ser. No. 12 / 547,533 filed on Aug. 26, 2009, which claims priority to Japanese Patent Application No. 2008-223868 filed on Sep. 1, 2008, both of which are hereby expressly incorporated by reference herein in their entireties.BACKGROUND[0002]1. Technical Field[0003]The present invention relates to an industrial robot, and more particularly to a horizontal articulated robot having a plurality of horizontally rotating arms.[0004]2. Related Art[0005]Among industrial robots, there is known a SCARA robot (a horizontal articulated robot) with a plurality of arms sequentially connected by means of a horizontal articulation. FIG. 12 shows an example of a planar structure of a common SCARA robot having two arms.[0006]As shown in FIG. 12, the SCARA robot includes a base 51, a first arm 52 having a base end portion horizontally rotatably connected to a base 51, and a second arm 53 having a ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B25J18/00
CPCB25J9/044Y10T74/20311Y10T74/20305B25J18/005
Inventor ONO, MASATOSHIMEYERHOFF, CHRISTOPH
Owner SEIKO EPSON CORP
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