CN201422063Y

CN201422063Y - Expansion-sleeve-type cast aluminum dummy shaft

Info

Publication number: CN201422063Y
Application number: CN2009200408759U
Authority: CN
Inventors: 刘小东
Original assignee: Wuxi Zhongda Motors Co Ltd
Current assignee: Wuxi Zhongda Motors Co Ltd
Priority date: 2009-04-20
Filing date: 2009-04-20
Publication date: 2010-03-10
Anticipated expiration: 2019-04-20

Abstract

The utility model relates to an expansion-sleeve-type cast aluminum dummy shaft, which is characterized in that a mandrel is arranged on a shaft seat, wherein an expansion sleeve is sleeved outside the mandrel, the outer surface of the expansion sleeve is provided with an outer key slot along the axial direction, a positioning key is arranged inside the key slot, a rotor iron core is sleeved outside the expansion sleeve, the side wall of a mounting inner hole of the rotor iron core is provided with an inner key slot along the axial direction, the outer end of the positioning key is plugged inside the inner key slot, a press plate which is used for pressing the rotor iron core is sleeved on the mandrel, and a tightening nut which facilitates the tightly press of the press plate against therotor iron core is connected with the mandrel in a threading way, and is characterized in that the mandrel which is sleeved in the expansion sleeve is of a cone body, a liner plate which is used for pressing the end surface of the expansion sleeve is sleeved on the mandrel, and a wedged plate is arranged on the mandrel above the liner plate. With the expansion-sleeve-type cast aluminum dummy shaft, not only the inner diameter of the iron core can be expanded, the regularity of the shaft hole of the cast aluminum rotor can be improved, and the metal processing procedure can be reduced, but alsothe shaft can be very convenient to withdraw after the rotor is cast with aluminum because of the cooperation between the mandrel and three sleeve conical surfaces, thereby saving labor and time.

Description

Expansion sleeve type cast-aluminum dummy shaft

Technical field

The dummy shaft that the utility model uses when relating to casting aluminum rotor process rotor punching lamination, specifically a kind of expansion sleeve type cast-aluminum dummy shaft.

Background technology

The vibration of threephase asynchronous and noise are the rigid quality index during the motor same industry is at war with.In order to solve vibration problem, need make each link from motor and take measures to be controlled.The casting aluminum rotor axle of electromechanics trade generally adopts solid shafting, only with true axle some differences is arranged on tolerance, punching and dummy shaft matched in clearance during owing to lamination, and after cast-aluminum rotor was cast, inside and outside footpath was more uneven.This certainly will influence the vibration of motor.Improve the cast-aluminum dummy shaft precision if adopt, tolerance can be brought the problem of two aspects near the method for true axle: one is the lamination difficulty, reduces production efficiency; Two for moving back axle difficulty, and the stressed increase of sliver causes bar failure when moving back spool, causes scrapping of cast-aluminum rotor.Join the vehicle motor axle if adopt processing cast-aluminum rotor axis hole, also there is following problem in the actual mechanical process: after the processing of (1), cast-aluminum rotor axis hole, between punching and the punching smear metal is arranged, easy to clean not, for the segmented cast-aluminum rotor that radial ducts is arranged, if the iron filings cleaning that enters in the air duct is unclean, there is hidden danger in operation to motor safety; (2), wayward through the rotor core axis hole behavior tolerance of metalworking.

The punching when lamination of original dummy shaft is that the sub-fraction sub-fraction is overlapped on dummy shaft, and is not only time-consuming, and dummy shaft very easily weares and teares, and needs behind the cast aluminium to knock and it could be backed off; The matched in clearance of punching and dummy shaft, after cast-aluminum rotor was cast, inside and outside footpath was more uneven.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of expansion sleeve type cast-aluminum dummy shaft that improves regularity, minimizing metalworking operation, minimizing motor vibration problems, the reduction motor manufacturing cost of cast-aluminum rotor axis hole and improve the motor workmanship is provided.

The technical scheme that provides according to the utility model, described expansion sleeve type cast-aluminum dummy shaft, be included in the mandrel that is provided with on the axle bed, outside mandrel, be set with expansion set, the expansion set outer surface axially offers outside keyway along it, be plugged with positioning key in the keyway, outside expansion set, be set with rotor core, rotor core is installed the endoporus sidewall and is axially offered internal keyway along it, described positioning key outer end is plugged in the internal keyway, on mandrel, be socketed with the pressing plate that is used to press rotor core, on mandrel, be bolted with and make pressing plate hold out against the clamp nut of rotor core, it is characterized in that: the one section mandrel that is socketed with expansion set is a cone, is set with the backing plate that is pressed against the expansion set end face on mandrel, is provided with clapboard on the mandrel above the backing plate.

The utility model is owing to be cone match, and expansion set is little more a lot of than rotor inner hole, can directly put expansion set with putting neat rotor punching.Save the lamination time.The utility model neat internal diameter unshakable in one's determination that not only can expand improves the regularity of cast-aluminum rotor axis hole, reduces the metalworking operation; And because moving back axle, mandrel and three lobes cover cone match go out very convenient, laborsaving saving time behind the casting aluminum rotor.

Description of drawings

Fig. 1 is an overall structure schematic diagram of the present utility model.

Embodiment

The utility model is described in further detail below in conjunction with concrete drawings and Examples.

As shown in the figure: the utility model mainly is made up of axle bed 1, expansion set 2, positioning key 3, rotor core 4, mandrel 5, backing plate 6, clapboard 7, pressing plate 8 and clamp nut 9 etc.

This expansion sleeve type cast-aluminum dummy shaft, be included in axle bed 1 and be provided with mandrel 5, outside mandrel 5, be set with expansion set 2, expansion set 2 outer surfaces axially offer outside keyway along it, be plugged with positioning key 3 in the keyway, outside expansion set 2, be set with rotor core 4, rotor core 4 is installed the endoporus sidewall and is axially offered internal keyway along it, described positioning key 3 outer ends are plugged in the internal keyway, on mandrel 5, be socketed with the pressing plate 8 that is used to press rotor core 4, on mandrel 5, be bolted with and make pressing plate 8 hold out against the clamp nut 9 of rotor core 4, the one section mandrel 5 that is socketed with expansion set 2 is cone, and the endoporus of expansion set 2 is the coniform installation endoporus adaptive with the cone of mandrel 5, is set with the backing plate 6 that is pressed against expansion set 2 end faces on mandrel 5, is provided with clapboard 7 on the mandrel above the backing plate 65.

The utility model is placed on mandrel 5 and expansion set 2 on the axle bed 1 earlier, puts backing plate 6, by putting positioning key 3 well, rotor core 4 is put expansion set 2 along positioning key on expansion set 2, twitches mandrel 5, and expansion set 2 is launched, and neat rotor core 4 internal diameters that expand insert clapboard 7.Put pressing plate 8, go up press then and press rotor core 4, its length is met the demands, back fastening nut 9, whole rotor core just press-fits and finishes.Put inferior integral body into Cast Aluminum Dies at last and carry out cast aluminium, after rotor core 4 cast aluminiums finish, unclamp clamp nut 9, take away pressing plate 8, unclamp clapboard 7, mandrel 5 has also just and then shunk with expansion set 2, just can withdraw from the dummy shaft device easily.

When designing, the axle bed of this novel expansion sleeve type cast-aluminum dummy shaft structure considered the generalization of frock, satisfied under the prerequisite of design strength that the cast aluminium axle bed adopts original structure, so that general with Cast Aluminum Dies.This novel expansion sleeve type cast-aluminum dummy shaft structure had both guaranteed the regularity of cast-aluminum rotor axis hole, can cancel cast-aluminum rotor axis hole manufacturing procedure again, and the cast-aluminum rotor quality fundamentally is enhanced, and has improved production efficiency greatly.

Claims

1, a kind of expansion sleeve type cast-aluminum dummy shaft, be included in axle bed (1) and be provided with mandrel (5), outside mandrel (5), be set with expansion set (2), expansion set (2) outer surface axially offers outside keyway along it, be plugged with positioning key (3) in the keyway, outside expansion set (2), be set with rotor core (4), rotor core (4) is installed the endoporus sidewall and is axially offered internal keyway along it, described positioning key (3) outer end is plugged in the internal keyway, on mandrel (5), be socketed with the pressing plate (8) that is used to press rotor core (4), on mandrel (5), be bolted with and make pressing plate (8) hold out against the clamp nut (9) of rotor core (4), it is characterized in that: the one section mandrel (5) that is socketed with expansion set (2) is a cone, on mandrel (5), be set with the backing plate (6) that is pressed against expansion set (2) end face, on the mandrel (5) of backing plate (6) top, be provided with clapboard (7).