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Reducer

A reduction device, bolt technology, applied in transmission parts, belts/chains/gears, mechanical equipment, etc., can solve problems such as leakage of motors, entry, etc., and achieve the effect of reducing the possibility

Active Publication Date: 2017-04-26
SUMITOMO HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the speed reduction device 911 having the input shaft 913 having the above-mentioned structure, there is a problem that the lubricant in the speed reduction device 911 for lubricating the pinion gear 925 and the like on the side opposite to the motor of the input shaft 913 may pass through The bolt insertion hole 929 enters the inside of the input shaft 913, and leaks to the motor side

Method used

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Examples

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Embodiment Construction

[0018] Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.

[0019] figure 1 It is an overall cross-sectional view showing the structure of a reduction gear transmission according to an example of an embodiment of the present invention. and, figure 2 yes figure 1 An enlarged cross-sectional view near the input shaft of image 3 Viewed from the motor side figure 1 Side view of the reduction gear.

[0020] The speed reduction device 10 has an eccentric swing type speed reduction mechanism 11 called a distribution type, and is used to drive joints of a manipulator (not shown).

[0021] In the reduction gear transmission 10 according to this embodiment, the power of the motor 13 is input through a so-called connecting shaft type input shaft 12 . The structure of the periphery of the input shaft 12 will be described in detail later.

[0022] The input shaft 12 is provided with a pinion gear 18 that...

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Abstract

The invention provides a speed reducer which reduces the probability of leak of a lubricant in the speed reducer from the inside of an input shaft to a motor side. The speed reducer (10) comprises an input shaft (12). The input shaft (12) is provided with a motor shaft insertion hole (12B) at the motor side end (12A) and provided with a pinion (18) engaged with a distribution gear (16) at the end (12D) of the side opposite the motor. The speed reducer (10) comprises a bolt insertion hole (12G) penetrating from the end face (12F) of the input shaft toward the motor shaft insertion hole; the bolt insertion hole comprises a large-diameter portion (12G1) for holding the head (80A) of a connecting bolt (80) and a small-diameter portion (12G2) used for insertion of the shaft (80B) of the connecting bolt. The chamfering amount (Hch1) of a first chamfer portion (CH1) of the large-diameter portion is greater than the chamfering amount (Hch2) of a second chamfer portion (CH2) of the small-diameter portion. A sealing gasket (90) is arranged between the head of the connecting bolt and the bottom surface (12G1a) of the large-diameter portion.

Description

[0001] This application claims priority based on Japanese Patent Application No. 2013-245485 filed on November 27, 2013. All the content of this Japanese application is incorporated in this specification by reference. technical field [0002] The invention relates to a reduction gear. Background technique [0003] For example, in Patent Document 1, it is disclosed that there is a Figure 5 The reduction gear unit shown is used in conjunction with a motor. The input shaft 913 of the reduction gear 911 has a motor shaft insertion hole 919 into which the motor shaft 917 is inserted in an end surface 915A of the one end portion 915 . Furthermore, a pinion 925 that meshes with a gear 923 of the reduction gear 911 is provided on the outer periphery 921B of the other end portion 921 . Further, an end surface 921A of the other end portion 921 has a bolt insertion hole 929 into which a fastening bolt 927 for fastening to the motor shaft 917 is inserted. [0004] and, if Figure 5 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H57/029
CPCF16H57/029
Inventor 西部慎一石川哲三
Owner SUMITOMO HEAVY IND LTD
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