CN214380571U

CN214380571U - Motor stator coil bulging tool

Info

Publication number: CN214380571U
Application number: CN202120694800.3U
Authority: CN
Inventors: 王浩鹏
Original assignee: Dalian Dapeng Precision Molding Co ltd
Current assignee: Dalian Dapeng Precision Molding Co ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2021-10-08
Anticipated expiration: 2031-04-07

Abstract

The utility model discloses a motor stator coil bulging tool relates to motor stator tool technical field, including the support platform, support platform upper end fixed mounting has the work support, and work support left side fixed mounting has the cylinder, the upper end of work support is equipped with the slide bar, installs the slider on the slide bar, and the slider lower extreme is connected with the railcar, the railcar lower extreme is installed on the guide rail, the railcar left side is equipped with the core that expands, and core internally mounted that expands has the piece that expands, is equipped with the awl that expands in the middle of the core that expands, the core left side that expands is installed on the work support through the fixed plate. The utility model utilizes the expansion conical surface, the axial movement of the cylinder is changed into the uniform radial movement, and the spring is utilized to realize the automatic return of the expansion sheet, thereby greatly improving the efficiency, saving the manual labor force and reducing the rework rate; the expansion sheet can directly expand radially outwards in a movable manner, the insertion stroke is greatly shortened, the friction force is eliminated, and the rejection rate is greatly reduced.

Description

Motor stator coil bulging tool

Technical Field

The utility model relates to a motor stator technical field specifically is a motor stator coil bulging type tool.

Background

A coil wound by a lower enameled wire is arranged in a motor stator slot, and insulating paper is arranged at a narrow slit of the lower slot for blocking; in practice, due to the springback of the coil, the coil can expand along the narrow gap towards the inner hole of the stator, even the insulating paper can expand into the round surface of the inner hole of the stator, sometimes the coil cannot expand out temporarily, but the coil can expand out after a period of time, the gap between the stator and the rotor is only 0.3 mm, and the rotation of the rotor is influenced, so that the allowance is not allowed; in order to solve the problem, the method generally adopted is to perform a bulging treatment on a stator which is already provided with a coil and is fixed with the coil, and apply radial force to a coil conducting wire through a narrow slot of a lower wire so that the conducting wire generates permanent plasticity and is not bulged into the circular surface of an inner hole of the stator; firstly, a groove is formed, and the groove is manually pressed by the simplest narrow steel sheet, the efficiency of the method is very low, then the method develops simultaneous slope bulging, the shape of the main part of the bulging jig is shown in a figure II, the part is integrated and has no movable part, the number of bulging sheets corresponds to the number of grooves of the stator, and the bulging sheets have certain slopes; the last section is straight, the stator is inserted into the fixed position from the inner diameter of the stator, and the coil in the stator is unfolded little by utilizing the inclination of the expansion sheet; the efficiency is obviously improved, but the working principle of the expansion type expansion; the top end of the expansion piece directly generates friction with the coil enameled wire, so that the insulating property of the enameled wire is reduced; although this method is efficient, it is not the best method and the scrap rate is high, a significant loss for stators that have already been processed to this stage.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a motor stator coil bulging tool to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a motor stator coil bulging tool, includes the support platform, and support platform upper end fixed mounting has the work support, and work support left side fixed mounting has the cylinder, the upper end of work support is equipped with the slide bar, installs the slider on the slide bar, and the slider lower extreme is connected with the railcar, the railcar lower extreme is installed on the guide rail, the railcar left side is equipped with the core that expands, and the core internally mounted that expands has the piece that expands, is equipped with the awl that expands in the middle of the core that expands, the core left side that expands is passed through the fixed plate and is installed on the work support.

Further: the left side of the expansion cone is connected with the pressing plate through the connecting sleeve, the right side of the expansion core is fixedly provided with an end cover, the middle of the end cover is provided with a guide post, and the expansion cone is arranged on the guide post.

Preferably: and an axial spring is arranged at the head part of the right side of the expansion cone.

Preferably: and a graphite copper sleeve is arranged between the connecting sleeve and the guide post.

Preferably: the guide head is installed on the right side of the end cover and is made of nylon.

Preferably: radial springs are arranged at the contact positions of the front end and the rear end of the expansion piece and the expansion core.

Preferably: and the upper end of the fixed plate is provided with a positioning plate.

It should be noted that: the number of slots of the electronic stator is generally 36, although there are more; all the expansion pieces are changed into movable and radially expanded, the bottom of each expansion piece is made into an inclined plane which leans against an expansion cone, two end faces of each expansion piece are blocked, and the expansion pieces move radially along with the axial movement of the expansion cones; the power of the expansion sheet along the radial direction comes from a force which enables the expansion cone to axially move, the force is decomposed on the inclined planes of the expansion cone and the bottom surface of the expansion sheet, an expansion type force which becomes radial movement, and a force which becomes the force enabling the expansion sheet to axially move along the expansion cone, the force is blocked, the force generates pressure on the blocked surface of the end surface of the expansion sheet, the expansion sheet (the pressure and the radial force are perpendicular to each other) moves towards the radial direction and inevitably generates a friction force, both ends of the expansion sheet are blocked, the friction force can enable the expansion sheet to generate a torque, the central point of the torque is the front end of the inclined plane at the bottom of the expansion sheet, once the torque is too large, the pressure of the two structures which are bound by both ends of the expansion sheet is too large, the friction force generated during the radial movement is too large, and the structural damage can be generated when the pressure exceeds the pressure resistance limit of the material, therefore, the pressure strength between the front end face of the expansion piece and the constrained structure must be checked, and the structure of the expansion piece must be optimized within the rated pressure strength in the period so as to reduce the bending moment generated by the radial friction force to the minimum; if it is said that the required radial expansion force is represented by F2 and the axial force of the expansion cone is represented by F1/36 (for this reason the row of stators has 36 slots), then the ratio of F1/36 to F2 is equal to the tangent of the single angle of the expansion cone; in practice, the force required by radial bulging cannot be accurately obtained, neither calculation nor accurate measurement can be performed, and only approximate estimation can be performed, and the diameter of a cylinder for slope bulging is taken at the same time in the row; taking the air pressure of 0.4 MPa, calculating: 50 x 3.14 x 0.4=3140 newtons; f1/36=3140/36=87.22 newtons; the pressure value between the front end face of each expansion piece and the constraint structure is the pressure value, and in practice, the constraint structure is formed by two ends of a radial narrow slit on a barrel-shaped part, and because in the expansion process, a stator is sleeved on the constraint structure, the stator is called as an expansion core; when the contact area of the front end face of each expansion piece and the constraint mechanism is A =2 × 10.48=20.96 square millimeters, the pressure is the ratio of F1/36 to A; through calculation: 87.22/20.96=4.17 MPa, which is much lower than the rated stress of the quenched steel material, about 200 MPa; when the expansion sheet moves in the radial direction, the friction force generated under the pressure is the pressure multiplied by the friction coefficient, the maximum friction coefficient between the quenched steels is 0.1, and the calculation is as follows: 87.22 0.1=8.72 newtons, the bending moment produced by this force, in this case not exceeding 8.72 newtons, is negligible; through the above stress analysis, the radial expansion by the expansion cone expansion sheet can be realized.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model utilizes the expansion conical surface, the axial movement of the cylinder is changed into the uniform radial movement, and the spring is utilized to realize the automatic return of the expansion sheet, thereby greatly improving the efficiency, saving the manual labor force and reducing the rework rate; the expansion sheet can directly expand radially outwards in a movable manner, the insertion stroke is greatly shortened, the friction force is eliminated, and the rejection rate is greatly reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the expanding core structure;

FIG. 3 is a schematic view of an expansion core structure;

FIG. 4 is an enlarged schematic view at A;

fig. 5 is a partial enlarged view of the motor stator.

In the figure: 1. The device comprises a support platform, 2, a working support, 3, a cylinder, 4, a fixing plate, 5, an expansion cone, 6, an expansion sheet, 7, an expansion core, 8, a sliding block, 9, a sliding rod, 10, a rail car, 11, a guide rail, 12, a pressing plate, 13, a connecting sleeve, 14, a positioning plate, 15, an end cover, 16, a guide head, 17, a radial spring, 18, a guide column, 19, an axial spring, 20, a motor stator, 21, an enameled wire, 22 and insulating paper.

Detailed Description

The present invention will be described below based on embodiments with reference to the attached drawings in the embodiments of the present invention, but it should be noted that the present invention is not limited to these embodiments, and some specific details are described in detail below in the detailed description of the present invention, however, those skilled in the art can fully understand the present invention for the parts not described in detail.

Furthermore, those skilled in the art will appreciate that the drawings are provided for purposes of illustrating the objects, features, and advantages of the invention and are not necessarily drawn to scale.

Also, unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, the meaning of "includes but is not limited to".

Referring to fig. 1-5, the present invention provides a technical solution: including support platform 1, 1 upper end fixed mounting of support platform has

work support

2, and 2 left sides fixed mounting of work support have cylinder 3, the upper end of work support 2 is equipped with slide bar 9, installs slider 8 on

slide bar

9, and 8 lower extremes of slider are connected with railcar 10, railcar 10 lower extreme is installed on guide rail 11, railcar 10 left side is equipped with bloated

core

7, and 7 internally mounted of bloated core have bloated piece 6, are equipped with bloated awl 5 in the middle of the core 7 that expands, 7 left sides of bloated core are installed on work support 2 through fixed plate 4.

The expansion cone 5 is of a hollow structure, the left side of the expansion cone 5 is connected with the pressure plate 12 through the connecting sleeve 13, the right side of the expansion core 7 is fixedly provided with the end cover 15, the middle of the end cover 15 is provided with the guide post 18, and the expansion cone 5 is arranged on the guide post 18.

The right head of the expansion cone 5 is provided with an axial spring 19.

A graphite copper sleeve is arranged between the connecting sleeve 13 and the guide post 18.

The right side of the end cover 15 is provided with a guide head 16 made of nylon.

Radial springs 17 are arranged at the contact positions of the front end and the rear end of the expansion sheet 6 and the expansion core 7.

The upper end of the fixed plate 4 is provided with a positioning plate 14.

When using the utility model, firstly, the utility model will be used

Firstly, a motor stator 20 is arranged on a rail car 10, the rail car 10 moves to the left side, the motor stator 20 is sleeved on the outer side of an expansion core 7, a switch is started to enable the rear end of a cylinder 3 to send compressed air, a pressing plate 12 is pushed to drive an expansion cone 5 to move towards the right side, under the constraint of the expansion core 7, an inclined plane at the bottom of the expansion piece 6 is tightly attached to the surface of the expansion cone 5, so that the expansion piece 6 is radially expanded under the action of continuous movement, the upper surface of the expansion piece 6 is contacted with insulating paper 22, the resistance of an enameled wire 21 is overcome under the action of continuous transmitted force, deformation is started until the expansion piece 6 moves to a position required by design, expansion is completed, a reversing switch is started again, the cylinder 3 is reset, the large end of the expansion cone 5 loses axial force, an axial spring 19 rebounds, the expansion cone 5 retreats towards the large end, the inner inclined planes of 36 expansion pieces 6 lose radial support, and simultaneously rebounds around a radial spring 17 of 36 expansion pieces to enable the expansion pieces to retract towards the axis, meanwhile, the expansion sheet 6 is stably contracted into the inner surface of the expansion core under the constraint of a narrow slit arranged on the expansion core 7; at this time, the user pushes the rail car 10 by hand to take out the expanded motor stator 20; the expansion die is lifted by a crane and then a new die can be lifted for the next expansion operation.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a motor stator coil bulging tool, includes support platform (1), and support platform (1) upper end fixed mounting has work support (2), its characterized in that: work support (2) left side fixed mounting has cylinder (3), the upper end of work support (2) is equipped with slide bar (9), installs slider (8) on slide bar (9), and slider (8) lower extreme is connected with railcar (10), install on guide rail (11) railcar (10) lower extreme, railcar (10) left side is equipped with bloated core (7), and bloated core (7) internally mounted has bloated piece (6), is equipped with in the middle of bloated core (7) and expands awl (5), it installs on work support (2) through fixed plate (4) to expand core (7) left side.

2. The expanding jig for the stator coil of the motor as claimed in claim 1, wherein: expand awl (5) hollow structure, expand awl (5) left side and pass through adapter sleeve (13) and be connected with clamp plate (12), expand core (7) right side fixed mounting has end cover (15), installs guide post (18) in the middle of end cover (15) to expand awl (5) and install on guide post (18).

3. The expanding jig for the stator coil of the motor as claimed in claim 2, wherein: and an axial spring (19) is arranged at the head part of the right side of the expansion cone (5).

4. The expanding jig for the stator coil of the motor as claimed in claim 2, wherein: and a graphite copper sleeve is arranged between the connecting sleeve (13) and the guide post (18).

5. The expanding jig for the stator coil of the motor as claimed in claim 2, wherein: the right side of the end cover (15) is provided with a guide head (16) made of nylon.

6. The expanding jig for the stator coil of the motor as claimed in claim 1, wherein: radial springs (17) are arranged at the contact positions of the front end and the rear end of the expansion sheet (6) and the expansion core (7).

7. The expanding jig for the stator coil of the motor as claimed in claim 1, wherein: and a positioning plate (14) is arranged at the upper end of the fixing plate (4).