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Power transmission apparatus

A technology of power transmission device and motor, applied in the direction of transmission device, gear transmission device, electromechanical device, etc., can solve the problems of weight increase and power transmission device volume increase, and achieve the effect of size reduction

Inactive Publication Date: 2019-05-14
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 problem that the volume of the power transmission device increases, especially the length in the axial direction increases, resulting in an increase in its weight.

Method used

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  • Power transmission apparatus
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Embodiment Construction

[0012] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0013] figure 1 It is a sectional view showing the power transmission device according to the embodiment of the present invention. figure 2 yes means figure 1 The front view of the stator core and rotor. In this specification, the direction along the central axis O1 of the rotor shaft 11 and the input shaft 41 is defined as the axial direction, and the direction perpendicular to the central axis O1 is defined as the radial direction. The direction is defined as circumferential.

[0014] The power transmission device 1 of the present embodiment is a gear motor in which a motor 10 and a reduction gear 40 are connected to form a unit.

[0015] The motor 10 includes a rotor 12 driven to rotate, a rotor shaft 11 integrated with the rotor 12 , and a stator 15 having a coil 13 and a stator core 14 . Furthermore, the motor 10 further includes a motor frame 17 co...

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PUM

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Abstract

The invention aims to provide a light power transmission apparatus, which is shortened in the axial direction. The power transmission device (1) comprises a motor which includes a stator (15) around which a coil (13) is wound, a motor frame (17) which covers the stator (15), and a cover (18) which covers an axial end portion of the motor frame (17). In addition, the cover (18) is formed of a non-conductive material, and a shortest creeping distance between a coil end (13a) of the coil (13) and the cover (18) is shorter than 6.3 mm.

Description

[0001] This application claims priority based on Japanese Patent Application No. 2017-212330 filed on November 2, 2017. The entire contents of this Japanese application are incorporated herein by reference. technical field [0002] The invention relates to a power transmission device. Background technique [0003] FIG. 11 of Patent Document 1 discloses a power transmission device including a motor having a stator around which a coil is wound, a motor frame covering the outer peripheral side of the stator, and a cover covering an end portion of the stator in the axial direction. body. [0004] Patent Document 1: Japanese Patent Application Laid-Open No. 07-248046 [0005] In the motor of the conventional power transmission device, it is necessary to provide a relatively large creepage distance between the coil and the cover to secure sufficient insulation for the coil. Therefore, there is a problem that the increase in the volume of the power transmission device, especiall...

Claims

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Application Information

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IPC IPC(8): H02K1/18H02K5/02H02K5/08H02K7/116
CPCH02K5/02H02K5/08H02K3/38H02K3/30H02K7/116H02K2213/03H02K11/215H02K5/22Y02T10/64F16H1/32H02K15/14
Inventor 守谷幸次田村光扩
Owner SUMITOMO HEAVY IND LTD
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