CN201057631Y

CN201057631Y - Structure of large load motor iron core and key of rotating shaft for transmitting torque

Info

Publication number: CN201057631Y
Application number: CNU2007200693975U
Authority: CN
Inventors: 应伟航; 王斌
Original assignee: Shanghai Electric Group Shanghai Electric Machinery Co Ltd
Current assignee: Shanghai Electric Group Shanghai Electric Machinery Co Ltd
Priority date: 2007-04-27
Filing date: 2007-04-27
Publication date: 2008-05-07
Anticipated expiration: 2017-04-27

Abstract

The utility model discloses a key structure of a torque transferring between a large load motor iron core and a rotary shaft, which comprises at least one pair of keyways of 180 degrees oppositely in the inner circle of the iron core, a plurality of welding ribs uniformly distributed on the peripheral surface of the motor rotary shaft. A keyway corresponding to the iron core keyway arranged at the external circle of the welding rib and a key nested between the two keyways, the key is formed by a pair of oblique keys with same structure in parallel, one side face of each oblique key is an oblique plane, while another side face is a ladder shape, namely a right-angle shaped concave is provided at the lower-middle part, the pair of oblique keys are respectively matched with the opposite keyway walls of the iron core and the welding rib through the ladder shaped side face, and the opposite oblique planes are combined in complementary inclination. By adopting the key structure of the torque transferring between the large load motor iron core and the rotary shaft, the utility model can satisfy the mechanical strength of over three times load of the motor; in addition, the utility model has convenient assembly and easier batch production.

Description

The structure of the key of large load motor iron core and rotating shaft transmitting torque

Technical field

The utility model relates to a kind of structure of axle key, relates in particular to the structure of the key of a kind of large load motor iron core and rotating shaft transmitting torque.

Background technology

Key is mainly used to realize the circumferentially fixing with transmitting torque of axle and parts on shaft (as gear, belt wheel); The axial restraint that can also realize parts on shaft that has is to transmit axial force; What have then can constitute axially moving connection so that part slides on axle.In motor, axle is a machine shaft, and parts on shaft then is an armature core.In metallurgy industry, motor need drag main mill, crimping machine, punching and shearing machine even load, and these loads mostly are the impact load, and mostly is the S9 duty of Fraquent start, and this just needs motor to have than higher overload capacity.The mechanical strength that requirement can be born the above nominal load of twice as rotor portion, and environment is abominable, wishes rotor portion reliable in structure, durable.At present, the motor product generally adopts rotor core heating after heat to be set on the axle, comes transmitting torque by the magnitude of interference, sees Fig. 1, and the key 3 ' between axle 1 and the iron core be a feather key, mainly is that hot jacket unshakable in one's determination plays the location to axle 1 time and leads.This method requires the axle external diameter to join car according to the rotor punching internal diameter, rotor punching can not be produced synchronously with axle, and rotor core needs hot jacket, increased the requirement to apparatus and process, occurs rotor core and axle sometimes and produce sliding phenomenon in actual motion.

Summary of the invention

The purpose of this utility model is to solve the problems referred to above that prior art exists, and the structure of the key of a kind of large load motor iron core and rotating shaft transmitting torque is provided, and the structure transmitting torque of this key is reliable, can satisfy the mechanical strength of three times of loads of motor overload.

The purpose of this utility model is achieved by following technical scheme: the structure of the key of a kind of large load motor iron core and rotating shaft transmitting torque, comprise that interior circle unshakable in one's determination is provided with a pair of relative 180 ° keyway at least, the some weldering muscle that are laid with on the machine shaft outer peripheral face, weldering muscle cylindrical be provided with the corresponding keyway of keyway unshakable in one's determination and be embedded key in both keyways, wherein, described key is formed side by side by the identical taper key of a pair of structure, a side of each taper key is an inclined-plane, the another side is a stairstepping, promptly has a rectangular-shaped depression in the middle and lower part of this side, described a pair of taper key cooperates by stepped side and relative keyway wall unshakable in one's determination and the weldering muscle separately, and to be form with the gradient complementation combine on their relative inclined-planes.

The structure of the above-mentioned large load motor iron core and the key of rotating shaft transmitting torque, wherein, two relative depressions of described a pair of taper key are antisymmetry settings, its depression bottom surface is relative with a side switch cell wall unshakable in one's determination and the weldering muscle respectively, and the depression height H is greater than the degree of depth M of its relative keyway, the height of described a pair of taper key is L, wherein L-H＜M.

The structure of the above-mentioned large load motor iron core and the key of rotating shaft transmitting torque, wherein, the gradient on each inclined-plane of described a pair of taper key is 1: 90～1: 110.

The structure of the above-mentioned large load motor iron core and the key of rotating shaft transmitting torque, wherein, the bottom surface of the depression on the another side of described a pair of taper key is 1.5～2.5mm far from the distance h of side, place.

The structure of the above-mentioned large load motor iron core and the key of rotating shaft transmitting torque, wherein, described keyway is preferably two pairs, to adapt to the rotating of motor.

Adopt the structure of the key of large load motor iron core of the present utility model and rotating shaft transmitting torque, can satisfy the mechanical strength of three times of loads of motor overload, and easy to assembly, be easy to produce in enormous quantities.

Description of drawings

Provide embodiment of the present utility model below in conjunction with accompanying drawing:

Fig. 1 is the sectional view of the large load motor rotating shaft of routine.

Fig. 2 is the schematic diagram of structure of the key of a kind of large load motor iron core of the present utility model and rotating shaft transmitting torque;

Fig. 3 is the enlarged drawing of A among Fig. 2;

Fig. 4 is the vertical view of taper key in the structure of key of a kind of large load motor iron core of the present utility model and rotating shaft transmitting torque.

Embodiment

See also Fig. 2, the structure of the key of a kind of large load motor iron core of the present utility model and rotating shaft transmitting torque, comprise unshakable in one's determination in circle be provided with at least that the some weldering muscle 2, weldering muscle 2 cylindricals that are laid with on a pair of relative 180 ° keyway (not shown), machine shaft 1 outer peripheral face are provided with the corresponding keyway 20 of keyway unshakable in one's determination and be embedded key 3 in both keyways.

As motor is single turning to, and arranges on weldering muscle 2 cylindricals of rotating shaft 1 that then a pair of relative position is 180 ° a keyway 20, also is provided with a pair of on the interior circle unshakable in one's determination and weldering muscle 2 corresponding keyways.Require to have rotating as motor, then arrange two pairs of keyways 20 on weldering muscle 2 cylindricals of rotating shaft 1, every pair of relative position also is 180 °, and two pairs and weldering muscle 2 corresponding keyways also are set on the interior circle unshakable in one's determination, bear the single moment that turns to separately for every pair, guarantee the reliable running of machine shaft part.

Key 3 is formed side by side by the

identical taper key

31,32 of a pair of structure, and a side 310,320 of each

key

31,32 is an inclined-plane, and the gradient on each inclined-plane is 1: 90～1: 110; Another side 311,321 is a stairstepping, promptly has a rectangular-

shaped depression

3110,3210 in the middle and lower part of this side, and the bottom surface of depression is 1.5～2.5mm far from the distance h of side, place.This to taper

key

31,32 separately by relative keyway 20 cooperations of stepped side 311,321 with unshakable in one's determination and weldering muscle 2, and their relative inclined-planes the 310, the 320th, (the seeing Fig. 3, Fig. 4) that combines with the form of gradient complementation.This is to two relative depressions the 3110, the 3210th of

taper key

31,32, and antisymmetry is provided with, its depression bottom surface is relative with a side switch cell wall of weldering muscle 3 with unshakable in one's determination 1 respectively, and the depression height H is greater than the degree of depth M of its relative keyway, and this height to

key

31,32 is L, wherein L-H＜M.

The technical solution of the utility model need not to be set to axle by rotor core heating after heat and upward and by the magnitude of interference comes transmitting torque.Because the position of key of the present utility model in keyway is special, key 3 (working face) on one side cooperates with unshakable in one's determination or weldering muscle 2 keyways, then leave 1.5～2.5mm gap with weldering muscle 2 or keyway unshakable in one's determination on one side, pressure on the working face is along the tangential direction effect of axle, very big torque can be transmitted, the mechanical strength of three times of loads of motor overload can be satisfied.Pair of keys can only be transmitted the torque of a direction, when transmitting two-way torque, and must be with two pairs of keys that are mutually 180 ° of angles.

Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, the utility model can also change and more mode, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model variation, the modification of the above embodiment.

Claims

1. the structure of the key of large load motor iron core and rotating shaft transmitting torque, comprise that interior circle unshakable in one's determination is provided with a pair of relative 180 ° keyway at least, the some weldering muscle that are laid with on the machine shaft outer peripheral face, weldering muscle cylindrical be provided with the corresponding keyway of keyway unshakable in one's determination and be embedded key in both keyways, it is characterized in that, described key is formed side by side by the identical taper key of a pair of structure, a side of each taper key is an inclined-plane, the another side is a stairstepping, promptly has a rectangular-shaped depression in the middle and lower part of this side, described a pair of taper key cooperates by stepped side and relative keyway wall unshakable in one's determination and the weldering muscle separately, and to be form with the gradient complementation combine on their relative inclined-planes.

2. the structure of the key of large load motor iron core according to claim 1 and rotating shaft transmitting torque, it is characterized in that, two relative depressions of described a pair of taper key are antisymmetry settings, its depression bottom surface is relative with a side switch cell wall unshakable in one's determination and the weldering muscle respectively, and the depression height H is greater than the degree of depth M of its relative keyway, the height of described a pair of taper key is L, wherein L-H＜M.

3. the structure of the key of large load motor iron core according to claim 1 and 2 and rotating shaft transmitting torque is characterized in that, the gradient on each inclined-plane of described a pair of taper key is 1: 90～1: 110.

4. the structure of the key of large load motor iron core according to claim 1 and rotating shaft transmitting torque is characterized in that, the bottom surface of the depression on the another side of described a pair of taper key is 1.5～2.5mm far from the distance h of side, place.

5. the structure of the key of large load motor iron core according to claim 1 and rotating shaft transmitting torque is characterized in that, described keyway is preferably two pairs, to adapt to the rotating of motor.