Rotary machine of inner rotor type

Details Rotary machine of inner rotor type Rotary machine of inner rotor type

1998-02-23

1999-10-19

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310 89, 310 91, 384512, 384613, 384615, 360 9908, 360 9907, 360 9912, H02K 516, F16C 1930, G11B 1702

Patent

active

059694491

ABSTRACT:
A miniature inner rotor type of rotary machine having a high durability and anti-vibration property, includes a double row bearing apparatus (2) and comprises a stepped shaft (10). The shaft has a larger diameter shaft portion (10a) around which an inner rolling contact recess (11a) is formed and a reduced diameter shaft portion (10b), a first outer race (12), first balls (13) interposed between the large diameter shaft portion and the first outer race, and a ball bearing (17) comprising an inner race (14) to be fitted over the reduced diameter shaft portion (10b), a second outer race (15), and second balls (16) to be interposed between the inner race (14) and the second outer race (15). The machine further comprises a housing (1) which includes a cylindrical central housing (5) having a stator (4) mounted on an inner side thereof, a lid part (6) having at a central portion thereof a cylindrical central boss (8), and a bottom part (7) having at a central portion thereof a cylindrical central boss (9), wherein each of the first and second races (12,15) are fitted into the respective bosses (8) and (9), a top end of the larger diameter shaft portion of said stepped shaft (10) extends through the central boss (8) of the lid (6) to protrude out the housing (1), and a rotor (3) is fixedly secured to the larger diameter shaft portion of said stepped shaft (10). The central boss (9) of bottom part (7) has a bottom portion with a reduced diameter (9a), and a compressed ring shape preload spring (18) is interposed between an upper surface of the reduced diameter portion (9a) and a lower end of the second outer race (15).

REFERENCES:
patent: 4713704 (1987-12-01), Voll et al.
patent: 5128571 (1992-07-01), Itsu
patent: 5606475 (1997-02-01), Ishizuka
patent: 5723926 (1998-03-01), Obara et al.
patent: 5820273 (1998-10-01), Obara
patent: 5826989 (1998-10-01), Obara et al.

Affiliated with

Also associated with

Rating

Rotary machine of inner rotor type does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rotary machine of inner rotor type, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary machine of inner rotor type will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2059989