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Eccentric rotation drive device

A technology of eccentric pivoting drive and pivoting shaft, which is applied in the direction of electromechanical devices, rotating bearings, engines, etc., and can solve problems such as short lubrication life, easy damage, and large energy loss

Active Publication Date: 2015-07-01
ULVAC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Grease lubrication has a shorter lubrication life and poorer cooling performance than oil lubrication
[0008] In the eccentric pivot drive device described in Patent Document 2, the heavy moving plate slides against the supporting members provided around it, and the energy loss due to friction or its inertia is large.
Also, since the device converts the rotational motion of the rotating shaft (pivoting motion of the pivoting shaft) into the linear motion of the moving plate, a large load such as inertial force or impact force is applied to the moving plate, the supporting member, or the rotating shaft, thereby There is a problem with easily damaging these parts

Method used

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  • Eccentric rotation drive device
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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0045] figure 1 It is a schematic cross-sectional view showing the eccentric pivot drive device according to the first embodiment of the present invention. The eccentric pivot drive is used, for example, as a drive source for a pump (such as a vacuum pump), a compressor, or other devices.

[0046] The eccentric pivot driving device 100 includes a housing 10 , a rotor 11 disposed in the housing 10 , and a stator 12 disposed around the rotor 11 and mounted on the housing 10 .

[0047] The case 10 includes a main body 1 having a cylindrical appearance, and covers 2 and 3 attached to openings at both ends of the main body 1 .

[0048] The rotor 11 has a rotary shaft 6 and a rotor core 7 arranged around the rotary shaft 6 . The rotary shaft 6 is rotatably supported by a bearing 14 mounted on a bearing mounting portion 1 a of the main body 1 of the housing 10 . The stator 12 has coils 8 and a stator core 9 .

[0049] figure 2 It is a figure which viewed the rotation shaft 6 of...

no. 2 approach

[0064] image 3 It is a cross-sectional view showing the pivot shaft 33 according to the second embodiment of the present invention. In subsequent descriptions, simplify or omit descriptions related to figure 1 The same components as those included in the eccentric pivot drive device 100 of the embodiments shown in FIG.

[0065] The cross-sectional area of ​​the flow channel of the axial force flow channel 331a of the flow channel 331 provided on the pivot shaft 33 increases with distance from the accommodation area 19 (refer to figure 1 ) side of the end portion 33b side, the cross-sectional area of ​​the flow channel is formed to expand in a stepwise manner. That is, the axial force flow path 331a of the flow path 331 functions as an enlarged portion. For example, the axial force flow channel 331 a has a first flow channel 336 , a second flow channel 337 and a third flow channel 338 in ascending order of flow channel cross-sectional area. In addition, the axial force flo...

no. 3 approach

[0074] Figure 4 is a sectional view showing a pivot shaft according to a third embodiment of the present invention.

[0075] The axial force flow path 431a of the pivot shaft 43 is formed in a tapered shape that continuously expands as it gets away from the end portion 43b. The radial flow channel 431b extends from the axial force flow channel 431a. In the tapered shape of the axial force flow channel 431a, the line that distinguishes the wall surface of the flow channel 431a and the space is formed as Figure 4 Although shown in a curved shape as seen in cross-section, it may be straight.

[0076] The axial force flow path 431a configured in this way can increase the suction force of lubricating oil by increasing the centrifugal force as in the above-mentioned second embodiment. In addition, since the axial force flow passage 431a penetrates in the axial direction, lubricating oil can also be supplied to a machine of a driven device (not shown) connected to the output end...

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PUM

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Abstract

[Object] To provide an eccentric circling drive device that is capable of performing appropriate lubrication and cooling by means of a processing liquid while preventing energy loss and damage to members due to friction. [Solving Means] A circling shaft 13 of an eccentric circling drive device 100 includes therewithin a flow path 131 that causes the flow of a lubricating oil F. The flow path 131 includes a thrust flow path 131a formed along an axial direction and a radial flow path 131b that extends along a radial direction of the circling shaft 13 from the thrust flow path 131a. An end portion of the radial flow path 131b is connected to a bearing 15. With such a configuration of the flow path 131, the lubricating oil F can be introduced from the end portion 13b of the circling shaft 13 into the bearing 15 by means of the circling motion of the circling shaft 13.

Description

technical field [0001] The present invention relates to an eccentric pivot drive device suitable for fluid machines such as pumps and compressors. Background technique [0002] Eccentric pivot drives include mechanisms with an eccentric pivot axis, suitable for vacuum pumps such as scroll or piston pumps, or for other devices that perform pivot drives. [0003] The eccentric pivot drive device described in Patent Document 1 includes a pivot shaft that is eccentric within a rotating shaft attached to a rotor (for example, refer to paragraph 0006 of the specification of Patent Document 1). In addition, the eccentric pivot driving device further includes an Oldham ring serving as a mechanism for preventing the pivot shaft from rotating. [0004] In the eccentric pivot driving device described in Patent Document 2, a rectangular moving plate is mounted on the end of the pivot shaft disposed eccentrically within the rotation shaft, and the moving plate moves in one direction as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K5/173F16C35/02F16C35/063F16C35/067F16N7/14F16N7/36
CPCF16N7/366H02K7/083H02K7/075F16N2210/18F16C33/6666F16N2210/14H02K7/14F04B9/045F04B39/06H02K5/161F16C23/10F04B39/0246F04C29/0085F04C29/023F04C29/025F16C35/02F16C35/063F16C35/067H02K5/173
Inventor 菅家幸雄柴山浩司
Owner ULVAC INC