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Motor with eccentric part and pump device using the same

A technology of eccentric parts and motors, applied in electromechanical devices, pumps, multi-cylinder pumps, etc., can solve problems such as high cost

Inactive Publication Date: 2006-10-11
BOSCH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the machining of such shafts, high costs are bound to result

Method used

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  • Motor with eccentric part and pump device using the same
  • Motor with eccentric part and pump device using the same
  • Motor with eccentric part and pump device using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The present invention is basically a motor having a specific eccentric portion, but those skilled in the art can understand it as a pump device using a motor as a driving source.

[0029] Reference figure 1 As shown in FIG. 2, the DC motor 10 has a motor housing 12 that divides a cylindrical inner space. The height of the motor housing 12 is approximately half the size of its diameter. The motor housing 12 includes a housing main body 121 with a U-shaped cross section and an end plate 122 blocking one end of the housing main body 121. At the center of the end plate 122, there is an outwardly expanding flange portion 122f. In addition, the center part of the housing main body 121 also has a receiving portion 121r formed by pressing. In order to reduce the size of the motor 10, the receiving portion 121r and the other parts of the housing main body 121 have the same height (that is, on the same plane). The insides of the receiving portion 121r and the flange portion 122f ser...

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PUM

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Abstract

In the present invention, the rotating shaft (30) itself is not eccentric, but the whole including the ball bearing (50) has an eccentric structure. Therefore, instead of cutting the rotating shaft (30) side, an eccentric portion is obtained by coupling an eccentric ball bearing (50) to the shaft portion of the straight rotating shaft (30). That is, the eccentric portion includes: a shaft portion having the same axis as that of the rotating shaft (30); and an eccentric ball bearing (50) coupled to the shaft portion. As an eccentric ball bearing, it is preferably eccentric on the inner side with a small diameter. The eccentric ball bearing (50) includes an inner ring (52) eccentric with respect to the axis of the rotating shaft (30), an outer ring (54) surrounding the outer side of the inner ring (52), and supported on these outer rings (54). ) and the ball (55) between the inner ring (52).

Description

Technical field [0001] The present invention relates to a motor having an eccentric portion, which includes a rotating shaft having an axis and supporting an armature and a commutator, and an eccentric portion formed on the rotating shaft eccentrically with respect to the axis, and the eccentric portion is used to drive an external device , For example, the output part of the pump in the hydraulic brake system of an automobile. In addition, the present invention also relates to a pump device using the motor. Background technique [0002] Since such a motor or pump device is mounted on an automobile, miniaturization and reduction of vibration and operating noise are pursued. [0003] Research on the eccentric part of the motor has found that until now, an eccentric shaft part is formed on a part of the rotating shaft by machining, and a needle bearing or a ball bearing is coupled to the outer circumference of the eccentric shaft part. Needle roller bearings can withstand higher lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K7/14B60T8/40F04B1/04F04B9/04F16C19/50F16C33/58H02K7/00H02K7/08
CPCB60T8/4022B60T8/4031F04B1/0413F04B9/042F16C3/04F16C19/50F16C33/58H02K7/003H02K7/083H02K7/14H02K7/075H02K7/08
Inventor 小山牧朗笃浩明齐藤学
Owner BOSCH CORP