CN2410810Y

CN2410810Y - Axle assembly for micro motor

Info

Publication number: CN2410810Y
Application number: CN 99257693
Authority: CN
Inventors: 李茂碷
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-12-24
Filing date: 1999-12-24
Publication date: 2000-12-13
Anticipated expiration: 2009-12-24

Abstract

The utility model relates to a mandrel assembly of a novel minisize electric machine. The utility model mainly comprises elements of a mandrel (3), a bearing (4), etc., wherein, the bearing (4) is formed by the method that a bearing outer ring (42) and a steel ball group (41) are combined, and the mandrel (3) is sheathed with the inner part of the bearing (4). Because the steel ball group of the bearing (4) is directly contacted with the mandrel according to the structure, and the utility model is not provided with inner ring elements, and therefore, the combination between the mandrel and the bearing is easier, and cost is low.

Description

A kind of arbor assembly of novel micromachine

The utility model relates to electrical category, particularly a kind of arbor assembly of novel micromachine.

Progress along with society, computer enters common people house, especially the common radiator fan on the notebook computer CPU, as shown in Figure 4, the structure of this radiator fan includes pedestal, the coil that disposes on the pedestal, has the fan body of axle and the magnet of the corresponding above-mentioned coil of fan body, because the inner space of notebook computer is limited, therefore relative the dwindling of volume of radiator fan, especially be furnished with two miniature bearings in the groove at pedestal center, this bearing provides as the axle of supporting the said fans body and is placed on wherein, makes fan body be utilized bearing high speed rotating under minimum coefficient of friction; The combination of this axle and bearing, its the best is to be appropriate close-fitting assembled state between axle and bearing inner ring, if assembled state is excessive closely cooperating, then miniature bearing causes damage easily in assembling process, if assembled state is loose fit, then skid easily between axle and bearing inner ring and cause abnormal rotation, especially in the occasion of high speed rotating, to produce noise will be inevitably because of contact-making surface skids, and therefore, above-mentioned axle is very high with the requirement on machining accuracy that bearing makes up, interior annular aperture as bearing is 1.5mm, so the processing of small-bore be very uppity under high-precision requirement, and processing cost is also very high, other is the person, under the uppity situation of bearing inner ring aperture precision, under combination between axle and bearing such as tension or the loosening state, all can cause all shortcomings.

The purpose of this utility model is exactly all shortcomings that the arbor assembly at above-mentioned common micromachine exists, and a kind of arbor assembly of novel micromachine is provided, guarantee between axle and bearing combination easily and cost low and do not produce noise.

Technical conceive of the present utility model:

According to the purpose of this utility model, a kind of arbor assembly of novel micromachine is provided, its structure consists predominantly of elements such as axle and bearing, and its middle (center) bearing is to be combined to form by outer race and steel ball group, and axle is to be set in the bearing; The steel ball group of bearing be directly contact with axle and do not have in the ring element, so between axle and bearing the combination be easier to and also cost also low; Because the steel ball group of bearing is directly to contact with axle, just forming is the some contact between the two, so axle does not produce noise when high speed rotating in addition.

Accompanying drawings structure of the present utility model and embodiment:

Fig. 1 is a cross-sectional schematic of the present utility model.

Fig. 2 is a schematic top plan view of the present utility model.

Fig. 3 is a block position enlarged diagram between axle of the present utility model and bearing.

Fig. 4 is the cross-sectional schematic of common radiator fan.

(1) be that pedestal, (11) are that fan body, (21) for magnet, (22) for flabellum, (3) for axle, (31) for annular groove, (4) be bearing, (41) for steel ball group, (42) for outer race, (43) for capping, (6) be clasp for recessed access slot, (131) for embedded hole, (2) for combination section, (13) for coil, (12).

Shown in accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3, the utility model be by pedestal (1), body (2), Axle (3), bearing (4), steel ball (5) and clasp (6) etc. consist of, wherein in the central authorities of pedestal (1) The position is formed with a cylinder shape combination section (12) to upper process, the outer peripheral edges of (12) configuration in the combination section Coil (11) is arranged, and the lower end of (12) is formed with groove (13) in the combination section, in the bottom of groove (13) The heart is provided with an embedded hole (131), and chimeric in this embedded hole (131) forming section projection state is arranged Support steel ball (5); Be provided with a fan body (2) in the top of pedestal (1), in the week of fan body (2) The inboard of edge is provided with the magnet (21) of corresponding above-mentioned coil (11), in the outside of fan body (2) periphery Be provided with flabellum (22), by the effect of magnet (21) and coil (11), make fan body (2) be able to Axle (3) is that center of rotation rotates, and reaches heat radiation to computer with flabellum (22); Bearing (4) be by Bearing outer shroud (42) and one group of above steel ball group (41) are combined to form, outside bearing outer shroud (42) The footpath is the internal diameter of corresponding base combination section (12), so bearing outer shroud (42) is placed on base combination Section (12) and locating, and steel ball group (41) is directly to contact with axle (3), can obtain littler friction Coefficient, the upper and lower end of perisporium is provided with annular groove and is embedded with capping (43) in bearing (4) outer shroud (42), This capping (43) gets so that steel ball group (41) is located in the scope of bearing (4); Axle (3) is set in In the bearing (4) and supported by bearing (4), form suitable inclined-plane at the bottom periphery of axle (3) (32), the top of (32) is formed with ring-type groove (31) on the inclined-plane; C type clasp (6) is to be positioned at combination Between the bottom of section (12) and the bearing (4), the block position of C type clasp (6) is corresponding axle (3) Ring-type groove (31), and the internal diameter of C type clasp (6) is slightly less than the external diameter of axle (3).

Embodiment of the present utility model:

At first C type clasp (6) is positioned in the combination section (12), bearing (4) is combined in the place, location of combination section (12) again, then C type clasp (6) is with bearing (4) packing and location; Axle (3) is placed in the bearing (4), because the internal diameter of C type clasp (6) is less than the external diameter of axle (3), and the bottom periphery of axle (3) is to form inclined-plane (32), when therefore stressing on axle (3) with axial force, the bottom of this axle (3) can reach the location that contacts with above-mentioned support steel ball (5) by C type clasp (6); Behind axle (3) integrated positioning, because its annular groove (3 1) is corresponding C type clasp (6), so the position of axle (3) is limited and can break away from bearing (4) upward; Finish axle (3) and bearing (4) after the combination of base combination portion (12), the upper end of axle (3) is the top that extends combination section (12), fan body (2) capable of being combined in axle (3) the upper end and finish the combination operation of radiator fan, by the effect of magnet (21) with coil (1), it is that center of rotation is rotated that fan body (2) is able to axle (3), the rotation of axle (3) is by the steel ball group (41) of bearing (4) and supports steel ball (5) to support, steel ball group (41) and steel ball (5) all are to be with axle (3) to contact, and just axle (3) is able to high speed rotating under minimum coefficient of friction.

Claims

1, a kind of arbor assembly of novel micromachine, it is made of pedestal (1), body (2), axle (3), bearing (4), steel ball (5) and clasp (6) etc., it is characterized in that being provided with a cylindric combination section (12) to upper process at the central part of pedestal (1), the outer peripheral edges of (12) dispose coil (11) in the combination section, the lower end of (12) is provided with groove (13) in the combination section, bottom centre at groove (13) is provided with an embedded hole (131), and chimeric in embedded hole (131) steel ball (5) is arranged; Be provided with a fan body (2) in the top of pedestal (1), be provided with the magnet (21) of corresponding above-mentioned coil (11) in the inboard of the periphery of fan body (2), be provided with flabellum (22) in the outside of fan body (2) periphery; Bearing (4) is to be combined to form by outer race (42) and one group of above steel ball group (41); Axle (3) is set in the bearing (4) and is supported by steel ball group (41), forms suitable inclined-plane (32) at the bottom periphery of axle (3), and the top of (32) is formed with ring-type groove (31) on the inclined-plane; C type clasp (6) is to be positioned between the bottom and bearing (4) of combination section (12), and the block position of C type clasp (6) is the ring-type groove (31) of corresponding axle (3), and the internal diameter of clasp (6) is the external diameter that is slightly less than axle (3).