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Power transmission device

A power transmission device, hollow technology, applied to the transmission device, transmission device parts, gear transmission device, etc., can solve the problems of huge processing time, increased cost, and low material yield, so as to suppress the increase in cost and avoid damage Effect

Active Publication Date: 2010-12-29
SUMITOMO HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for example, when it is desired to manufacture the fitting surface 10B by cutting or the like, the cutting allowance of the (long and thin) cylindrical portion 10C becomes very large, resulting in a reduction in the yield of the material and a large processing time.
Combining forging and cutting, etc., will increase the workload when trying to cut the raw material into a certain shape
Moreover, when castings are used for molding, special molds must be designed and manufactured separately.
That is, when actually wanting to manufacture the center pipe 10 having the extended portion 10A, as a result, it is a fact that a considerable increase in cost is caused.

Method used

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Examples

Experimental program
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Embodiment Construction

[0023] Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.

[0024] figure 1 It is a cross-sectional view of a joint drive device (power transmission device) of a manipulator to which an embodiment of the present invention is applied. figure 2 is along figure 1 A cross-sectional view looking at line II-II.

[0025] The joint driving device 10 rotatably supports and drives a rotating member 14 constituting another part of the manipulator while being fixed to a base member 12 constituting a part of the manipulator (not shown in its entirety). In addition, when the joint drive device 10 is used for the joint drive of the second stage or later, the base member 12 corresponds to the movable member of the first stage. Therefore, at this time, the base member 12 itself is also movable, and the rotating member 14 is relatively rotated with respect to the (movable) base member 12 . In addition, the term so-called base member or ...

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PUM

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Abstract

The invention provides a power transmission device. An extension part is efficiently formed which can prevent damage of power cables or wires for control, and simultaneously the cost of the device is utmostly controlled to increase. The power transmission device (10) is provided with a hollow part (H1) penetrating through the whole device in a housing (20), a hollow second wheel carrier (flange)(48) which forms the end part of the hollow part (H1) by an inner peripheral face (48A) at its axial end part. An extension part (EP1) the inner diameter of which becomes larger with close to an open end is formed on the inner peripheral face (48A) of the second wheel carrier (48).

Description

technical field [0001] This application claims priority based on Japanese Patent Application No. 2009-146989 filed on June 19, 2009. The entire content of this application is used in this specification by reference. [0002] The present invention relates to a power transmission device provided with a hollow portion penetrating the entire device. Background technique [0003] In industrial machines such as manipulators and machine tools, a power transmission device having a hollow portion penetrating through the entire device is generally used. The hollow part is used to pass the power cable of the motor or the harness for control, etc. [0004] Patent Document 1 discloses an example in which a power transmission device including such a hollow portion is constituted by an eccentric swing-type speed reduction mechanism in which an external gear swings inside an internal gear. In this power transmission device, a central tube having a central hole penetrating the entire redu...

Claims

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Application Information

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IPC IPC(8): B25J17/00F16H1/32
CPCF16H1/32F16H2057/02069B25J19/0029F16H2001/323
Inventor 石川哲三为永淳
Owner SUMITOMO HEAVY IND LTD