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Sealing structure

A sealing structure and oil seal technology, which is applied in the direction of engine sealing, manufacturing tools, transmission parts, etc., can solve the problems of longer axial length and larger axial size of peripheral components, and achieve the effect of shortening the axial length

Active Publication Date: 2011-10-26
SUMITOMO HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a tendency that the axial length of peripheral parts is likely to be further increased due to the relationship between the bent portion, the bearing space, and the arrangement positions of the bolts, etc.
Taking the example of the device of Patent Document 1 above, for example, from the bending start portion P1 of the first link member 4 to the bending start portion P2 of the second link member 6 (for the first link member 4 and the second link member The part required for the connection of the rod member 6) the axial dimension L2 tends to become larger

Method used

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Examples

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Embodiment Construction

[0018] An example of an embodiment of the present invention will be described in detail below based on the drawings.

[0019] figure 1 A geared motor to which the sealed structure according to the embodiment of the present invention is applied is shown. figure 2 It is an enlarged view of its main part.

[0020] The geared motor 20 is used to drive an unillustrated tool magazine, and includes a motor 24 , a pre-reducer (pre-reducer) 26 , and a final reducer 28 . As will be described in detail later, in this embodiment, the sealing structure of the present invention can be applied to the pre-reducer housing 27 of the pre-reducer 26 and the final reducer housing 30 corresponding to the output shaft of the final reducer 28 Seal the vicinity of the joint.

[0021] The pre-reducer 26 is a one-stage speed reducer having a pinion bevel gear 34 and a bevel gear 36 . The final reducer 28 is a reducer having a so-called internal meshing planetary gear structure, and has an input sh...

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Abstract

The present invention provides a sealing structure. The axial shortening of a device assembled with an oil seal at a state that the oil seal is configured. The sealing structure comprises the following components: a main speed reducer casing (first component) (30) which has a tubular part (30A) with a peripheral surface facing the outer space (first space) (Spo); two oil seals (50, 52) which are arranged at the inner periphery of the tubular part (30A) of the main speed reducer casing (30); a speed pre-reducer casing (second component) (27) which abuts against the inner periphery of the firstoil seal (50); and an inner pin component (third component) (46) which abuts against the inner periphery of the second oil seal (52) and the speed pre-reducer casing (27) and has one part facing the inner space (Spi) of the main speed reducer (28). The outer space (SPo) and the inner space (Spi) are sealed through the first oil seal and the second oil seal.

Description

technical field [0001] The present invention relates to sealing structures such as lubricants. Background technique [0002] Such as image 3 and Figure 4 As shown, for example, Patent Document 1 discloses a sealing structure in which a first oil seal 8 and a second oil seal 10 are arranged in parallel between the first link member 4 and the second link member 6 of the robot arm R. The first and second oil seals 8 and 10 are arranged with a certain gap SL, and the space including the gap is filled with vacuum grease 12 . A driven body 14 having a cylindrical portion 14A is connected and fixed to the second link member 6 . The cylindrical portion 14A of the receiving body 14 is used to ensure the component strength of the receiving body 14 itself and to secure a space for installing the bearing 16 . The bearing 16 is arranged between the cylindrical portion 14A of the receiver 14 and the first link member 4 , whereby the first link member 4 and the second link member 6 ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/06F16C33/72F16H57/02F16H57/023F16H57/029F16J15/32
CPCF16J15/002F16J15/54B25J19/00B25J9/06F16H57/04
Inventor 鹤身洋芳贺卓
Owner SUMITOMO HEAVY IND LTD
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