JP6852913B2 - Resolver stator structure with positioning function - Google Patents

Description

The present invention relates to a resolver stator structure having a positioning function, and in particular, other members such as a pedestal and a front lid are easily and surely attached to a resolver through a positioning through hole formed in a stator cover member in which a stator core is insert-molded. That is.

When this type of resolver R, which has been conventionally used, is attached to a motor case, for example, the configuration disclosed in FIG. 2 of Patent Document 1 can be mentioned as FIG.
That is, in FIG. 8, what is indicated by reference numeral R is a resolver, and the first resin case 36 of the resolver R is configured to have a U-shaped cross section, and one end 36a of the first resin case 36 has a first resin case 36a. The two resin cases 34 are integrally formed to form the coupler portion 37a.

A plurality of terminals 38 to 40 and 41 to 43 are planted in the coupler portion 37a, and a stator core 33 of the resolver R is provided inside the coupler portion 37a.
The coil 35 wound around the stator core 33 provided via a well-known potting agent 53 is connected to terminals 38 to 40 and 41 to 43 planted in the coupler portion 37a.

The front lid 5 of the brushless motor M is provided in the recess 52a on the mounting side 52 of the first resin case 36, and the fitting protrusion 5A of the front lid 5 is fitted in the recess 52a. The front lid 5 is strongly connected to the resolver R.
Inside the stator core 33, a resolver rotor 32 provided on the rotating shaft 8 of the brushless motor M is rotatably installed inside.

Further, wherein the projection B of the peripheral edge of the front lid 5, a screw 54 which is screwed into the rim R ₁ resolver R is screwed through the collar 50.
Therefore, the resolver R can be integrally attached to the front lid 5 of the brushless motor M.

Japanese Unexamined Patent Publication No. 2012-21249

Since the conventional resolver stator structure is configured as described above, the following problems exist.
That is, the resolver R and the front lid 5 of the brushless motor M are fitted with the fitting protrusion 5A in the recess 52a, and the resolver R and the front lid 5 are screwed together by the screw 54. Since the coupling accuracy and the thermal expansion coefficient are different between the coupling portion of the screw 54 and the coupling portion, it is difficult to maintain the coupling state as designed due to a large change with time, and it is also difficult to obtain a highly accurate resolver motor. ..

The present invention has been made to solve the above problems, and in particular, secures other members such as a pedestal and a front lid through a positioning through hole formed in a stator cover member in which a stator core is insert-molded. It is an object of the present invention to provide a resolver stator structure having a positioning function to be attached to a resolver.

The resolver stator structure having a positioning function according to the present invention includes a stator core having a plurality of protruding magnetic poles protruding inward at intervals of a predetermined angle, a stator cover member in which the stator core is installed inside by integral molding, and the stator cover member. A plurality of positioning through holes formed on one surface or one surface and the other surface, the stator one surface or the stator one surface and the stator other surface of the stator core are directly exposed to the outside air, and are located outside the stator core. each positioning through-holes formed in the stator cover member, when installing the other member having a plurality of positioning projections made from the pedestal or the front cover on the stator cover member functions as positioning of the other member, the positioning through holes, in a plan view, consists of rectangular, Ru configuration der previous SL positioning projection is engaged with the positioning holes.

The resolver stator structure having the positioning function according to the present invention can have the following effects.
That is, a stator core having a plurality of protruding magnetic poles protruding inward at intervals of a predetermined angle, a stator cover member in which the stator core is integrally formed, and one surface of the stator or one surface of the stator and the other surface of the stator of the stator cover member. The stator cover is formed on the stator cover so as to have one surface or one surface of the stator and the other surface of the stator directly exposed to the outside air, and a plurality of positioning through holes located outside the stator core. each positioning through hole when attaching the other member having a plurality of positioning projections made from the pedestal or the front cover on the stator cover member functions as positioning of the other member, formed in the stator cover member of the stator core and integral Since the protrusion of the other member is engaged with the positioning through hole, a reliable connection between the resolver and the other member can be obtained. The positioning through hole has a square shape when viewed in a plane .
By pre-Symbol positioning projection is made of the configuration engaged with the positioning holes, and a resolver and another member, for example, can be performed alignment zero automatically. Further, since the other member has a configuration of a pedestal or a front lid of the motor, it is possible to easily and surely connect an electronic device other than the motor .

It is a perspective view which shows the stator core of the resolver stator structure by embodiment of this invention. It is a back view which shows the resolver stator structure which insert-molded the stator core of FIG. 1 into a stator cover member. It is an enlarged plan view of the main part of FIG. It is a perspective view which shows the other member (the front lid, pedestal, front lid, etc. of a motor) attached to the resolver stator structure of FIG. It is a perspective view which shows the state which connected the stator core of FIG. 1 and the other member of FIG. It is a perspective view which shows the state which attached the other member to the resolver stator structure after completion by embodiment of this invention. It is a perspective view which shows the state which provided the surface cover on the surface in the state of FIG. It is sectional drawing which shows the conventional resolver stator.

In the resolver stator structure having a positioning function according to the present invention, other members such as a pedestal and a front lid can be easily and surely attached to the resolver stator structure through positioning through holes formed in a stator cover member integrally molded with a stator core. Is something that can be done.

Hereinafter, a preferred embodiment of the resolver stator structure having the positioning function according to the present invention will be described together with the drawings.
The same or equivalent parts as those of the conventional example will be described with the same reference numerals.
In FIG. 1, what is indicated by reference numeral 33 is a stator core 33 having a plurality of protruding magnetic poles 33A protruding inward at intervals of predetermined angles, and each of the protruding magnetic poles 33A has a well-known exciting winding and output winding. A stator winding 35 made of wire is wound around.

The stator core 33 is set in a mold cavity (not shown) of an injection molding machine (not shown), and a resin material is injected into the cavity in a molten state from an injection nozzle (not shown) of the injection molding machine.
In this case, an integral mold is also possible, but a well-known overmold that molds almost all of the mold is preferable.
Next, when the mold cavity is compacted, the mold is closed, and the mold is opened after a predetermined time, the resolver stator structure 110 shown in FIG. 2 is obtained with the stator core 33 of FIG. 1 being insert-molded.

As shown in FIG. 2, the stator winding 35 is usually wound around each protruding magnetic pole 33A by a well-known automatic winding machine (not shown) after the insert molding of the stator core 33 is completed. Therefore, the winding of the stator winding 35 described in the above paragraph [0013] is performed at this stage as a step.

Three tubular collars 201 are provided on the peripheral edge of the stator cover member 200 into which the stator core 33 is insert-molded. Inside the three tubular collars 201, the stator core 33 is provided inside the stator cover member 200 by insert molding so as to be coaxial with the axis P.
As shown in FIGS. 6 and 7, a terminal pin holding portion 37a having a plurality of terminal pins 203 extends integrally along the radial direction r at the position of the straight portion 202 on the outer circumference of the stator cover member 200. Has been done.

At the outer position of the stator core 33 provided inside the stator cover member 200, a square (or square or the like) positioning through hole 100 is formed as an example.
Since the positioning through hole 100 has a through shape, the stator one surface 33a of the stator core 33 can be seen from the one surface 200A side which is the back side of the stator cover member 200.
As shown in FIG. 3, in the positioning through hole 100, one surface 33a of the stator is exposed to the outside up to half of the positioning through hole 100, and the rest is the through hole 100A. Further, only one surface of the stator 33a, or one surface of the stator (33a) and the other surface of the stator (33b) are directly exposed to the outside air.

A plurality of protrusions 300 are formed on the outer peripheral portion of the stator cover member 200, and a tubular collar 201 is insert-molded on each protrusion 300.
When attaching another member 5 such as a front lid or a pedestal of a motor to each of the positioning through holes 100, first, a bolt (not shown) is screwed into each of the tubular collars 201, which is not shown. The resolver stator structure 110 is fixedly attached to the mating member.

After that, the other member 5 is attached to the resolver stator structure 110 by engaging the positioning projection 301 (see FIG. 4) having the wall 100B of the other member 5 into the positioning through hole 100. Then, with the other member 5 mounted on the stator cover member 200, the other member 5 can be a part of, for example, an engine part of an automobile or the like.

FIG. 7 shows the resolver stator structure 110 shown in FIG. 2 upside down, and the other surface 200B in FIG. 2 as the front side.
In this case, as is clear from FIG. 7, another member 5 is located at the lower portion, and a plurality of terminal pins 203 are integrally molded along the axial center P direction inside the terminal pin holding portion 37a. There is.
A motor or the like (not shown) provided on the other member 5 can be used as a resolver stator (not shown) by being connected to the other member 5.
FIG. 7 shows the other side 200B side, which is the front side of the resolver stator structure 110.
That is, in the actual assembly, the stator winding 35 shown in FIG. 1 is wound, and when the stator core 33 is positioned in a mold (not shown) via a core and molded by overmold molding, the resolver shown in FIG. 2 is formed. The stator structure 110 is obtained.
The stator winding 35 is then wound around each protruding magnetic pole 33A by an automatic winding machine (not shown) to be in the state shown in FIG. 2, and is entwined with the terminal pin 203.
Next, each positioning projection 301 of the other member 5 of FIG. 4 is inserted and engaged with each positioning through hole 100 shown in FIG. 2, so that the back side of the resolver stator structure 110 is as shown in FIG. It is mounted on one side 200A.
The relationship between the other member 5 and the stator core 33 at this time is as shown in FIG. 5 when they are shown so as to be offset from each other.

In the resolver stator structure having a positioning function according to the present invention, a mounting attachment such as a motor is mounted through the positioning through hole by using a positioning through hole on one surface of the resolver stator structure in which the stator core is overmolded. Compared with the conventional structure in which the resolver is positioned and fixed by a plate-shaped member, both the assembly and the structure are simplified and the accuracy is improved.

5 Other members 33 Stator core 33A Protruding magnetic pole 33a One side of stator 33b Other side of stator 35 Stator winding 37a Terminal pin holding part 100 Through hole for positioning 100A Through hole
100B wall 110 resolver stator structure 200 stator cover member 200A one surface (back side)
200B other side (front side)
201 Cylindrical collar 202 Straight line part 203 Terminal pin 300 Protrusion 301 Positioning protrusion r Radial direction

Claims (1)

A stator core (33) having a plurality of protruding magnetic poles (33A) protruding inward at intervals of a predetermined angle, a stator cover member (200) in which the stator core (33) is installed inside by integral molding, and the stator cover member. It is formed on one surface (200A) or one surface (200A) and the other surface (200B) of the (200), and the stator one surface (33a) or the stator one surface (33a) and the stator other surface (33B) of the stator core (33) are directly connected to each other. It is provided with a plurality of positioning through holes (100) that are exposed to the outside air and are located outside the stator core (33).
Each of the positioning through holes (100) formed in the stator cover member (200) is an other member (5) having a plurality of positioning protrusions (301) formed of a pedestal or a front lid in the stator cover member (200). When installing, it functions as a positioning for the other member (5) .
The positioning through hole (100) has a rectangular shape when viewed in a plane.
A resolver stator structure having a positioning function in which the positioning protrusion (301) is engaged with the positioning through hole (100).

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