CN206099594U - Drag cup has casing of brush motor - Google Patents

Abstract

The utility model discloses a drag cup has casing of brush motor, the casing includes cylindric lateral wall and discoid front end wall, front end wall is inboard protrudingly to be equipped with one and to extend to the tubulose bearing frame in the casing cavity, the cylindric lateral wall of casing mills the outsourcing wall that approaches to become to be used for fixed end cover at casing rear end opening part, outsourcing the thickness of the wall is less than the cylindric side the thickness of the wall of casing, be connected through annular step between the cylindric lateral wall of casing and the outsourcing wall, annular step is located the plane of perpendicular to casing axial lead, form a cyclic annular inclined plane between annular step and the outsourcing wall, the beneficial effects of the utility model reside in that, the casing of this motor is prepared through the machine tooling method, and the precision is higher, is provided with cyclic annular inclined plane at the rear end of casing opening part, can adapt to the end cover of a broad coverage error, be provided with the tubulose bearing frame in the casing, both ends are provided with two bearing rooms around the bearing frame to increased the axial power of droing of bearing, the concentricity of rotor pivot also improves greatly.

Description

A kind of casing of drag cup brush motor

Technical field

This utility model belongs to technical field of motors, specifically refers to a kind of casing of drag cup brush motor.

Background technology

DC hollow cup brush motor is widely used in steering wheel, and Fig. 1 is the casing of current existing DC hollow cup motor Component cross-sectional schematic, the case component of existing DC hollow cup motor includes cylinder-shaped bearing 23, casing 2 and iron core 21, Cylinder-shaped bearing 23 is pressed directly into the top of casing 2, and bearing 23 is smaller with the frictional force of the contact portion of casing 2, lacks stop It is spacing so that the peel force of bearing 23 is less, typically only can reach 10kg or so, it is difficult to meet the demand of user；Simultaneously after casing 2 End cap (not shown) is generally fitted with end opening, therefore is provided with installation step, but because end cap is generally moulding, Prepared by Shooting Technique, due to due to processing technique, the scale error of end cap is bigger than the scale error of metal chassis very Many, when mounted, the conjugation for being likely to result in assembling is inconsistent, and the big end cap of error may easily loosen in metal chassis, It is easy to fall off；The rotating shaft of existing hollow-cup motor simultaneously is typically fixed by two bearings, and one of bearing is fixed on casing Front end, another bearing is fixed on end cap, this structure, because the error of end cap is larger, also easily causes the rotating shaft of rotor Concentricity is reduced, and so as to the abrasion of the rotating shaft of increasing, reduces precision.

Utility model content

This utility model is in order to overcome the deficiency of prior art, it is proposed that a kind of higher drag cup brush motor of precision Casing.

This utility model is to solve above-mentioned technical problem by following technical proposals.

A kind of casing of drag cup brush motor, the casing is cup-shaped and with a hollow cavity, and casing includes cylinder Shape side wall and discoid front bulkhead, the front bulkhead center of the casing is provided with rotating shaft punched out, and casing rear end is in open-like shape, described Casing front bulkhead inner side is convexly equipped with a tubulose bearing block extended in casing hollow cavity, the front end of the tubulose bearing block and Rear end respectively sets one for installing the bearing chamber of bearing, and the milling at casing rear end opening of the cylindrical lateral wall of casing is thin into for solid The outer containment wall of fixed end lid, the thickness of outer containment wall less than casing cylindrical lateral wall thickness, casing cylindrical lateral wall and outer containment wall it Between connected by circular step, the circular step is located normal in the plane of case axis line, circular step and outer containment wall Between form an annular chamfer, magnet steel installation step, the front end are additionally provided between the tubulose bearing block and casing front bulkhead Circular array is evenly distributed with the screw hole of multiple insertion front bulkheads on wall.

As a kind of improvement of the present utility model, in the tubulose bearing block front end bearing chamber and rear end bearing are communicated with The rotating shaft accommodating hole of room, the fore bearing room and rear bearing chamber are size identical cylindrical cavity, the fore bearing room and Afterwards the internal diameter of bearing chamber is more than the internal diameter of rotating shaft accommodating hole.

Used as a kind of improvement of the present utility model, the external diameter of the cylindrical lateral wall of casing is 17mm.

Used as a kind of improvement of the present utility model, the length of the cylindrical lateral wall of casing is 18mm.

Used as a kind of improvement of the present utility model, the thickness of the cylindrical lateral wall of casing is 1～3mm.

Used as a kind of improvement of the present utility model, the thickness of the outer containment wall of casing is 0.5～1mm.

As it is of the present utility model it is a kind of improve, cylindrical lateral wall, discoid front bulkhead and the homogeneous body of tubulose bearing block into Type.

The beneficial effects of the utility model are that this casing is prepared by machine-tooled method, and precision is higher, after casing Annular chamfer is provided with end opening, during installation, the annular chamfer gos deep into a side wall of casing to end cap carries out lateral compression, The end cap larger for scale error, remain to extruding fix, end cap is secured firmly in casing, therefore, it is possible to adapt to one compared with The end cap of wide scope error；Simultaneously tubulose bearing block is provided with casing, the rear and front end of bearing block is provided with two bearing chambers, Can bearing be carried out axially trapping it is spacing, so as to increase the axial peel force of bearing, the concentric locating precision of rotor shaft Also greatly improve.

Description of the drawings

Fig. 1 is the structural representation of prior art.

Fig. 2 is structural representation of the present utility model.

Specific embodiment

This utility model preferred embodiment is given below in conjunction with the accompanying drawings, to describe the technical solution of the utility model in detail.

Such as Fig. 2, a kind of embodiment of the casing of drag cup brush motor, including casing 1, the casing 1 is cup-shaped and has There is a hollow cavity 10, casing includes integrally formed cylindrical lateral wall 13 and discoid front bulkhead 14, the cylindric side of casing The external diameter of wall is 17cm, and length is 18cm, and the center of front bulkhead 14 of the casing 1 is provided with rotating shaft punched out 11, and casing rear end is in Open-like shape, the inner side of 1 front bulkhead of the casing 14 is convexly equipped with a tubulose bearing block 12 extended in casing hollow cavity 10, described The front-end and back-end of tubulose bearing block 12 respectively set a bearing chamber 120 for installing bearing, the company of being provided with tubulose bearing block 12 Logical front end bearing chamber 120 and the rotating shaft accommodating hole of rear end bearing room 120, the fore bearing room 120 and rear bearing chamber 120 are greatly 120 internal diameters of little identical cylindrical cavity, the fore bearing room 120 and rear bearing chamber are more than the internal diameter of rotating shaft accommodating hole, because This its junction defines the installation step positioned to bearing, increased the breakaway force of bearing；The cylindrical lateral wall of casing 1 13 at casing rear end opening milling it is thin into for fixing the outer containment wall 131 of end cap, the thickness of outer containment wall 131 is cylindric less than casing The thickness of side wall 13, wherein, the thickness of outer containment wall 131 is 0.5mm, and the thickness of cylindrical lateral wall 13 is 2.5mm, and casing is cylindric Connected by circular step 133 between side wall 13 and outer containment wall 131, the circular step 133 is located normal to case axis line Plane in, form an annular chamfer 132 between circular step 133 and outer containment wall 131, end cap is arranged on casing rear end opening Place, the side wall of end cap is fixed by the extruding of annular chamfer 132, between the tubulose bearing block 12 and casing front bulkhead 14 also Magnet steel installation step 15 is provided with, for being fixedly mounted on the magnet steel in the outside of tubulose bearing block 12, on the front bulkhead 14 in a ring Array is evenly distributed with the screw hole 140 of multiple insertion front bulkheads 14, for motor to be integrally attached to into other parts.

Although the foregoing describing specific embodiment of the present utility model, it will be appreciated by those of skill in the art that These are merely illustrative of, and protection domain of the present utility model is defined by the appended claims.Those skilled in the art Member can make numerous variations to these embodiments or repair on the premise of without departing substantially from principle of the present utility model and essence Change, but these changes and modification each fall within protection domain of the present utility model.

Claims (7)

1. a kind of casing of drag cup brush motor, it is characterised in that the casing is cup-shaped and with a hollow cavity, casing Including cylindrical lateral wall and discoid front bulkhead, the front bulkhead center of the casing is provided with rotating shaft punched out, and casing rear end is in spacious Mouth shape, the casing front bulkhead inner side is convexly equipped with a tubulose bearing block extended in casing hollow cavity, the tubulose bearing The front-end and back-end of seat respectively set a bearing chamber for installing bearing, cylindrical lateral wall milling at casing rear end opening of casing It is thin into for fixing the outer containment wall of end cap, the thickness of outer containment wall less than casing cylindrical lateral wall thickness, casing cylindrical lateral wall It is connected by circular step between outer containment wall, the circular step is located normal in the plane of case axis line, ring-type platform An annular chamfer is formed between rank and outer containment wall, between the tubulose bearing block and casing front bulkhead magnet steel erecting bed is additionally provided with Rank, circular array is evenly distributed with the screw hole of multiple insertion front bulkheads on the front bulkhead.

2. the casing of drag cup brush motor according to claim 1, it is characterised in that be provided with the tubulose bearing block Connection front end bearing chamber and the rotating shaft accommodating hole of rear end bearing room, the fore bearing room and rear bearing chamber are size identical circle Internal diameter of the internal diameter of cylindrical cavity, the fore bearing room and rear bearing chamber more than rotating shaft accommodating hole.

3. the casing of drag cup brush motor according to claim 2, it is characterised in that the cylindrical lateral wall of casing it is outer Footpath is 17mm.

4. the casing of drag cup brush motor according to claim 3, it is characterised in that the length of the cylindrical lateral wall of casing Spend for 18mm.

5. the casing of drag cup brush motor according to claim 4, it is characterised in that the thickness of the cylindrical lateral wall of casing Spend for 1～3mm.

6. the casing of drag cup brush motor according to claim 5, it is characterised in that the thickness of the outer containment wall of casing is 0.5～1mm.

7. the casing of drag cup brush motor according to claim 6, it is characterised in that cylindrical lateral wall, it is discoid before End wall and tubulose bearing block are homogeneous body formed.