Arm structure of human-type robot

Details Arm structure of human-type robot Arm structure of human-type robot

2001-11-16

2003-06-17

Cuchlinski, Jr., William A. (Department: 3661)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Robot control

C700S246000, C700S247000, C700S249000, C700S250000, C700S251000, C700S253000, C700S259000, C700S262000, C700S264000, C318S568100, C318S568120, C318S568200, C901S001000, C901S009000, C901S046000, C901S047000, C901S048000, C701S023000

Reexamination Certificate

active

06580970

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an arm structure of a human-type robot, and particularly to an arm structure designed so that when an elbow joint connecting an upper arm portion and a lower arm portion to each other is bent, an object is prevented from being sandwiched between a lower end of the upper arm portion and an upper end of the lower arm portion.
2. Description of the Related Art
There is an animal-type robot capable of walking by four legs, which is known from Japanese Patent Application Laid-open No.2000-218589, wherein each of the four legs is divided into an upper leg portion and a lower leg portion, which are connected to each other by a substantially cylindrical joint, so that they can be bent.
In the above known robot, an axis of the joint is disposed substantially at the center of the width of the upper and lower leg portions as viewed in a direction of the axis of the joint. For this reason, when the upper and lower leg portions are bent into V-shape, there is a possibility that a foreign matter is sandwiched between the upper and lower arm portions in the vicinity of the joint, whereby a smooth operation of the joint may be hindered.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to prevent a foreign matter from being sandwiched between the upper and lower arm portions at a location corresponding to the elbow joint of the human-type robot to hinder the smooth operation of the joint.
To achieve the above object, according to the present invention, there is provided an arm structure of a human-type robot in which an upper arm portion and a lower arm portion are connected to each other by a substantially cylindrical elbow joint so that they can be bent, the upper and lower arm portions having a width larger than the diameter of the elbow joint as viewed in a direction of an axis of the elbow joint, and being bendable in a limited range between an extended position in which they are extended into a substantially straight line and a bent position in which they are bent in one direction from the extended position, wherein the position of the axis of the elbow joint is offset in the one direction from the center of the width of the upper and lower arm portions, and a lower end of the upper arm portion and an upper end of the lower arm portion, which are connected to the elbow joint, are decreased in width toward the elbow joint on a side opposite from the one direction.
With the above arrangement, the position of the axis of the substantially cylindrical elbow joint is offset in the one direction from the center of the width of the upper and lower arm portions (in a direction of bending of the upper and lower arm portions from the extended position to the bent position). Therefore, when the upper and lower arm portions are bent in the one direction from the extended position to the bent position, it is difficult for a gap, into which a foreign matter may enter, to be defined between the upper and lower arm portions in the vicinity of the joint. Thus, it is possible to reliably prevent the foreign matter from being sandwiched between the upper and lower arm portions in the vicinity of the joint. In addition, the widths of the lower end of the upper arm portion and an upper end of the lower arm portion, which are connected to the elbow joint, are decreased toward the elbow joint on the side opposite from the one direction. Therefore, when the upper and lower arm portions are bent in the one direction from the bent position to the extended position, it is difficult for a gap, into which a foreign matter may enter, to be defined between the upper and lower arm portions in the vicinity of the joint. Thus, it is possible to reliably prevent the foreign matter from being sandwiched between the upper and lower arm portions in the vicinity of the joint.
The above and other objects, features and advantages of the invention will become apparent from the following description of the preferred embodiment taken in conjunction with the accompanying drawings.


REFERENCES:
patent: 2553830 (1951-05-01), Motis
patent: 4626164 (1986-12-01), Chang
patent: 5369346 (1994-11-01), Takahashi et al.
patent: 5378969 (1995-01-01), Haikawa
patent: 5402050 (1995-03-01), Ozawa
patent: 5404086 (1995-04-01), Takenaka et al.
patent: 5416393 (1995-05-01), Gomi et al.
patent: 5581166 (1996-12-01), Eismann et al.
patent: 5594644 (1997-01-01), Hasegawa et al.
patent: 5697256 (1997-12-01), Matteo
patent: 5737217 (1998-04-01), Nishikawa et al.
patent: 5872893 (1999-02-01), Takenaka et al.
patent: 6021363 (2000-02-01), Nishikawa et al.
patent: 6243623 (2001-06-01), Takenaka et al.
patent: 2228598 (1974-01-01), None
patent: 0 661 614 (1994-12-01), None
patent: 1 060 383 (2000-11-01), None
patent: 1 103 450 (2000-11-01), None
patent: 2000-218589 (2000-08-01), None
Nicholls, Bipedal dynamic walking in robotics, 1998, Internet, pp. 1-74.*
Hirai et al. The development of Honda humanoid robot, 1998, IEEE, pp. 1321-1326.*
Hwang et al., Motion planning of eye, hand and body of humanoid robot, 1997, IEEE, pp. 231-236.*
Atkenson et al., Using humanoid robot to study human behavior, 2000, Internet, pp. 46-56.*
Adams et al., Humanoid Robotis: A new king of tool, 2000, Internet, pp. 20-31.
Ishiguro et al., Robotive: A robot generates episode chanins of our daily file, Apr. 2001, Internet, pp. 1-6.
Price et al., A lightweight plastic robotic humanoid, 2000, Internet/IEEE, pp. 1571-1576.
Konno et al., Development of a light-weight biped humanoid robot, IEEE, 2000, pp. 1565-1570.
Konno et al., Development of a humanoid robot Saika, 1997, Intelligent Robots and Systems, pp. 805-810.
Aramaki et al., Development of autonomous mobile humanoid robot, 1999, IEEE, pp. 529-534.
Hirai et al., Current and future perspectie of honda humanoid robot, 1997, IEEE, pp. 500-508.
Dasgupta et al., Making feasible walking motion of humanoid robots from human motion capture data, 1999, IEEE, pp. 1044-1049.

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