JP2004023961A - Terminal connecting structure for stator coil of resolver stator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the fixation of a stator coil caused by the deformed part of a resin that is formed when a terminal line is heat-connected to a terminal by forming recesses at the foot of the terminal arranged at the circumference of a resolver stator. <P>SOLUTION: A terminal connecting structure for the stator coil of the resolver stator is configured such that the recesses (40) are formed around the foot (4a) of the terminal (4) in the circumference (25), thus preventing the fixation of the stator coil (1) caused by the deformed part (32) of the resin that is formed when the terminal line (1a) is heat-connected to the terminal (4). <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a terminal connection structure for a stator coil of a resolver stator, and more particularly, to forming a recess around a base of a terminal to prevent deformation of resin caused by heat of soldering or welding used when connecting the stator coil to the terminal. The present invention relates to a novel improvement for preventing the stator coil from being fixed.
[0002]
[Prior art]
As a conventional terminal connection structure of a stator coil of this type of resolver stator, for example, as shown in FIG. 5, a terminal mounting hole 30 formed in a peripheral portion 25 of a part of a ring-shaped insulating cap 21 is used. The terminal 4 is inserted and implanted in the.
An end wire 1a of the stator coil 1 is connected to the terminal 4 in a tangled manner. The end wire 1a and the terminal 4 are integrally connected by a heating connection means 31 by soldering (or welding). .
[0003]
[Problems to be solved by the invention]
Since the conventional terminal connection structure of the stator coil of the resolver stator is configured as described above, the following problems exist.
That is, when the terminal wire of the stator coil is connected to the terminal by soldering, not all of the wrapped portion by soldering is soldered to the terminal, but the lower portion is not slackened so as not to be integrated with the terminal. When a resolver is mounted on a vehicle or the like and used, the disconnection due to vibration or the like is absorbed by this slack to prevent it. However, when performing heat connection by soldering or welding, this heat As a result, the resin in the peripheral portion is melted and deformed, and the deformed portion 32 shown in FIG. 5 may solidify the sag 1b of the stator coil.
If the slack 1b is fixed, it cannot be absorbed when it receives vibration or the like, and the stator coil may be disconnected, which is a major obstacle in quality control.
[0004]
The present invention has been made to solve the above-described problems, and in particular, a recess is formed around the base of the terminal, and the heat generated by soldering or welding used when connecting the stator coil to the terminal is used. It is an object of the present invention to provide a stator coil terminal connection structure of a resolver stator that prevents fixing of a stator coil due to deformation of a resin.
[0005]
[Means for Solving the Problems]
The terminal connection structure of the stator coil of the resolver stator according to the present invention is configured such that the stator coil is formed on each magnetic pole tooth of the resolver stator by insert molding or via a ring-shaped insulating cap formed separately from the resolver stator. Winding, winding end wires of the stator coil around a plurality of terminals provided in terminal mounting holes in a peripheral portion of the annular insulating cap, and connecting the stator coil and the terminals integrally by soldering or welding. In the terminal connection structure of the stator coil of the resolver stator, a recess is formed around a root of the terminal on the peripheral edge, and the recess communicates with the terminal mounting hole. Configuration.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of a terminal connection structure of a stator coil of a resolver stator according to the present invention will be described with reference to the drawings. The same or equivalent parts as those in the conventional example will be described using the same reference numerals.
1 to 3, a rotor 1A is disposed inside and a pair of ring-shaped insulating caps 21 and 22 are attached to magnetic pole teeth 20 of a resolver stator 2 formed of an iron core. The stator coil 1 is connected in series to each magnetic pole tooth 20 via a connecting wire 23.
The ring-shaped insulating caps 21 and 22 may be formed integrally with the resolver stator 2 by insert molding, or may be injection-molded separately from the resolver stator 2 and provided on both surfaces of the resolver stator 2. I have.
[0007]
At a part of the peripheral edge 24 of the resolver stator 2, there is located a peripheral part 25 integrally formed in a part of one of the annular insulating caps 21 and 22 so as to protrude in the radial direction. The terminal 4 is erected on the peripheral portion 25.
The terminal 4 is integrally formed with the base 26 and has an L-shape (a linear shape is also possible) with the terminal 4 and the base 26. A lead 27 is connected to the base 26 and the terminal 4 is connected to the terminal 4. Are inserted through a terminal mounting hole 30 (shown in FIG. 4) of the peripheral portion 25 and protrude outward. Further, a concave portion 40 is formed around the root portion 4a of the terminal 4 on the peripheral edge portion 25, and the root portion 4a and the peripheral edge portion 25 are formed in a non-contact state by a space. The recess 40 communicates with the terminal mounting hole 30.
[0008]
On the back surface of the peripheral portion 25, the terminal 4 may be fixedly held by using an insulating mold 10 by varnish application or potting.
[0009]
An end line 1a (shown in FIG. 4), which is a portion near the end after winding the magnetic pole teeth 20 of the stator coil 1, is wound around the outer periphery of the terminal 4 a plurality of times as shown in FIG. The winding connection 5 is formed by the terminal 4 and the end wire 1a (referred to as "barrage" in the art).
[0010]
As shown in FIG. 4, the whole winding connection portion 5, that is, the whole terminal 4 is not integrated by the soldering or welding heating connection means 31, but is wound around the terminal 4. The end wire 1a and the terminal 4 are integrally connected and integrated except for a plurality of turns of the lower portion which is a part of the attached end wire 1a, and the remaining portion is not integrated with the terminal 4 and operates independently. A slack 1b, which is a possible free end line, is formed.
[0011]
Since the slack 1b is wound around the outer periphery of the terminal 4 a plurality of times, it has the same effect as a spring. When the stator coil 1 expands and contracts in the direction of arrow A due to expansion due to heat, or from outside. When the vibration in the direction indicated by the arrow A and the vibration in the direction indicated by the arrow B perpendicular to the above described direction are received by the vibration of the slack 1b, most of the slack can be absorbed by the spring and the slack action of the slack 1b. Can be prevented from being broken.
[0012]
When the end wire 1a is integrally connected to the terminal 4 by the above-described heating connection means 31, the heat around the terminal 4a of the terminal 4 may be melted and deformed by the heat at that time. The portion 32 does not rest on the slack 1b of the stator coil 1 as in the prior art and does not fix it. Since the deformed portion 32 enters the concave portion 40, the deformed portion 32 does not reach the slack 1b. The fixing of the slack 1b can be completely prevented. The shape of the concave portion 40 is not limited to the shape shown in FIG. 4, and other shapes such as a dish shape are also possible. The shape of the terminal 4 is not limited to the L-shape, but may be a linear shape or the like.
[0013]
【The invention's effect】
Since the terminal connection structure of the stator coil of the resolver stator according to the present invention is configured as described above, the following effects can be obtained.
That is, a concave portion is formed around the base of the terminal attached to the terminal attaching hole in the peripheral portion of the ring-shaped insulating cap, and when the end wire is connected to the terminal by heating, a part of the resin deformed by the heat becomes part of the stator coil. Without being fixed by the slack, the slack is always secured, the disconnection of the stator coil can be reliably prevented, and the reliability and the yield of the resolver can be improved.
[Brief description of the drawings]
FIG. 1 is a plan view showing a terminal connection structure of a stator coil of a resolver stator according to the present invention.
FIG. 2 is a sectional view of FIG.
FIG. 3 is an enlarged sectional view of a main part of FIG. 2;
FIG. 4 is an enlarged sectional view of a main part of FIG.
FIG. 5 is a sectional view showing a conventional configuration.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stator coil 1a End wire 1b Slack 2 Resolver stator 4 Terminal 4a Root part 21 Ring-shaped insulating cap 25 Peripheral part 30 Terminal mounting hole 31 Heating connection means 32 Deformation part 40 Recess

Claims (2)

The stator coil (1) is inserted into each magnetic pole tooth (20) of the resolver stator (2) through a ring-shaped insulating cap (21) formed by insert molding or formed separately from the resolver stator (2). And winding the end wire (1a) of the stator coil (1) around a plurality of terminals (4) provided in a terminal mounting hole (30) in a peripheral portion (25) of the ring-shaped insulating cap (21). In a terminal connection structure for a stator coil of a resolver stator, the stator coil (1) and the terminal (4) are integrally connected by soldering or welding. ), A concave portion (40) is formed around a root portion (4a) of the resolver stator. The terminal connection structure for a stator coil of a resolver stator according to claim 1, wherein the recess (40) communicates with the terminal mounting hole (30).

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