JPH08114164A - Starter - Google Patents

Abstract

PURPOSE: To prevent separation of a brush energizing member from a brush energizing member containing part after a brush energizing member is assembled to a brush energizing member containing part. CONSTITUTION: A brush energizing member containing part 111 molded integrally with an end frame 10 is arranged at an end frame 10. The brush energizing member containing part 111 has a recessed part. A brush energizing member 60 to press a brush 20, electrically connected to a battery, not shown, against the rectifier 51 of an armature 50 is disposed in the recessed part When the brush energizing member 60 is contained in the brush energizing member containing part 111, one end of the brush energizing member 60 is fixed to the brush energizing member containing part 111, whereby after the brush energizing member 60 is assembled to the brush energizing member containing part 111, separation of the brush energizing member 60 from the brush energizing member containing part 111 is prevented from occurring through reliable and simple constitution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a starter used for starting an internal combustion engine.

[0002]

2. Description of the Related Art In Japanese Utility Model Publication No. 63-30211, a cylindrical brush holder having a bottom is integrally molded inside an end frame made of plastic, and a brush is urged in the brush holder. There is disclosed a starter in which a brush spring and a brush are arranged, and the brush is in contact with a face type commutator. With this configuration, the brush holder can be molded integrally with the end frame by the synthetic resin molding process, and the assembling becomes easy.

[0003]

However, in the above-mentioned starter, after the brush spring is assembled to the brush retainer of the end frame, the brush spring freely moves within the brush retainer, and the brush spring is removed from the brush retainer. There is a risk that the brush may come off, and there is a problem that it hinders the assembly of the brush.

Therefore, the present invention has been made to solve the above problems, and after the brush urging member is accommodated in the brush urging member storage portion, the brush urging member is accommodated in the brush urging member storage portion. It is an object of the present invention to provide a starter capable of preventing the separation of the.

[0005]

In order to achieve the above object, according to claim 1, an armature having a commutator disposed on one end face of an armature core, and an abutting member for contacting the commutator with a battery and an electric machine. Connected to each other, a brush holder for holding the brush, a brush urging member for urging the brush toward the commutator, and a brush urging member housing for accommodating the brush urging member inside. An end frame having a portion, and one end of the brush urging member is fixed to the brush urging member housing portion.

According to a second aspect of the present invention, in addition to the starter according to the first aspect, a heat dissipation member is provided between the brush and the brush urging member.
According to a third aspect of the present invention, in contrast to the starter according to the second aspect, the heat-dissipating member is a good conductor that absorbs and dissipates heat. According to a fourth aspect, the starter according to the first aspect is characterized in that the brush biasing member is a coil spring.

According to a fifth aspect of the present invention, in addition to the starter according to the first aspect, the brush urging member accommodating portion is molded integrally with the end frame. According to a sixth aspect of the invention, in addition to the starter according to the first aspect, the brush urging member storage portion is formed separately from the end frame.

According to a seventh aspect of the present invention, in addition to the starter according to the fifth aspect, the brush biasing member accommodating portion has a cylindrical shape or a polygonal cylindrical shape, and is protruded from an inner peripheral surface of the end frame. The starter that does is adopted. According to an eighth aspect of the present invention, in addition to the starter according to the fifth aspect, the brush biasing member storage portion has a through hole that communicates with the outside of the end frame, and the position of the brush biasing member is regulated in the through hole. A starter is adopted in which a regulating member is arranged and the through hole is closed by the regulating member.

According to a ninth aspect of the present invention, in addition to the starter according to the sixth aspect, a convex portion is provided at one end of the brush biasing member housing portion, and a concave portion provided on the end frame is fitted into the convex portion. The starter is characterized by being worn. In claim 10, the starter according to claim 1,
The brush urging member employs a starter characterized by being a pair of permanent magnets.

According to an eleventh aspect of the present invention, in addition to the starter according to the first aspect, the brush biasing member has a truncated cone shape. Claim 12
With respect to the starter according to claim 1, the brush urging member storage portion has the inner diameter of the brush from the one end side of the brush urging member that contacts the inner circumference of the brush urging member storage portion. It has a frusto-conical shape that increases toward the other end that comes into contact with the commutator, and the inner diameter of one end side of the brush urging member storage portion located at one end side of the brush urging member is equal to that of the brush urging member. A starter featuring a smaller outer diameter is used.

[0011]

According to the present invention, in claim 1, when the brush urging member is accommodated in the brush urging member storage portion, one end of the brush urging member is fixed to the brush urging member storage portion. Therefore, after the brush urging member storage portion is assembled with the brush urging member, it is possible to reliably and easily prevent the brush urging member from coming off the brush urging member storage portion with a simple structure.

According to a second aspect of the present invention, in the starter having the structure of the first aspect, the heat-dissipating member is arranged between the brush and the brush urging member. Therefore, the heat generated by the brush when the armature rotates is dissipated. It is possible to reduce the heat transmission from the brush to the brush urging member storage portion and prevent the brush urging member storage portion from being deformed due to heat generation. According to the third aspect of the present invention, in contrast to the starter according to the first aspect, the heat-dissipating member is made of a good conductor that absorbs and dissipates heat, so that the heat capacity of the brush and the good conductor is increased, the temperature rise of the brush is suppressed, and heat is generated. Can be reduced.

According to a fourth aspect of the present invention, in the starter having the structure of the first aspect, since the brush urging member is the coil spring, one end of the coil spring and the inner circumference of the cylindrical storage portion surely contact each other, and The biasing member can be fixed securely. According to the fifth aspect, in the starter having the structure according to the first aspect, since the brush urging member storage portion is molded integrally with the end frame, the production can be facilitated.

According to a sixth aspect of the present invention, in the starter according to the first aspect, the brush biasing member storage portion is formed separately from the end frame, so that the brush can be easily assembled in the brush biasing member storage portion. Becomes According to the seventh aspect of the present invention, in contrast to the starter of the fifth aspect, the brush biasing member storage portion has a cylindrical shape or a polygonal tubular shape, and protrudes from the inner peripheral surface of the end frame, so that the space in the end frame is effective Can be used for.

According to an eighth aspect of the present invention, in addition to the starter according to the fifth aspect, the brush biasing member housing portion has a through hole communicating with the outside of the end frame, and the position of the brush biasing member is regulated in the through hole. Since the regulation member is arranged and the through hole is closed by the regulation member, the pressing force of the brush urging member can be arbitrarily set by changing the entire length of the regulation member.

According to a ninth aspect of the present invention, in addition to the starter according to the sixth aspect, a convex portion is provided at one end of the brush urging member housing portion, and the concave portion provided in the end frame is fitted into the convex portion. Therefore, the brush urging member storage portion can be freely selected according to the shape of the brush urging member, and a number of brush urging member storage portions can be set for one end frame.

In the tenth aspect of the present invention, in contrast to the starter of the first aspect, since the brush urging member is a pair of permanent magnets, the repulsive force of the magnetic force of the permanent magnets of each other is used to appropriately press the brush. Can be given. In the eleventh aspect, in addition to the starter having the structure of the first aspect, the brush urging member has a truncated cone shape, so that the brush urging member storage portion is the large diameter portion of the frustoconical shape of the brush urging member. In addition to being able to contact the inner circumference of the brush and securely fixing it, it does not contact the inner circumference of the brush urging member storage part except the large diameter part of the brush urging member, and the brush can be flexibly flexibly urged. The member can be pressed against the commutator.

According to a twelfth aspect of the present invention, in addition to the starter of the first aspect, the brush urging member housing portion has an inner diameter from one end side of the brush urging member that contacts the inner circumference of the brush urging member housing portion. The brush has a frustoconical shape that increases toward the other end that contacts the commutator, and the inner diameter of one end side of the brush biasing member storage portion located at one end side of the brush biasing member is outside the brush biasing member. Since the brush urging member is smaller than the diameter, the brush urging member does not get caught on the inner circumference of the brush urging member storage portion, and the brush urging member can be flexibly flexibly used as a commutator in the same manner as in claim 11. Can be pressed.

[0019]

EXAMPLE A first example will be described with reference to FIG. FIG.
FIG. 10 is a partial cross-sectional view of the starter showing the present embodiment.
Is an end frame of a starter made of resin (for example, phenol resin), has a bottomed tubular shape, and is open at one end. The brush 20 is provided on the opening surface 10a.
A brush holder 30 for holding the brush holder 30 is arranged, and the brush holder 30 has a field device 41 (for example, a permanent magnet) inside.
Between the one end surface 40a of the yoke 40 in which is arranged and the opening surface 10a of the end frame 10 by tightening a through bolt (not shown). 50 is an armature, 51 is an armature iron core, and this armature iron core 51
A face type commutator 52 is disposed on one end surface of the.
The armature 50 is provided with a rotation shaft (not shown),
The rear end of this rotary shaft is supported by a bearing (not shown) of the end frame 10.

The end frame 10 is provided with a brush urging member storage portion 11 made of resin (for example, phenol resin) molded integrally with the end frame 10, and this brush urging member storage portion 11 is provided. Is the recess 11
A brush urging member 60 having a and pressing the brush 20 electrically connected to a battery (not shown) to the commutator 52 of the armature 50 is provided in the recess.

The brush urging member 60 is a coil spring formed by spirally winding a small-diameter rod member, and the outer diameter of only the first winding of the tip of the brush urging member 60 is equal to the brush urging member housing portion 11. The inner diameter of the concave portion on the side opposite to the brush is set to be large. Therefore, the brush urging member 60 is fixed to the concave portion of the brush urging member housing portion 11 by the contact frictional force by press fitting.

The brush biasing member accommodating portion 11 has a cylindrical or polygonal cylindrical shape and projects from the inner peripheral surface of the end frame 10. Next, the operation of the above configuration will be described. When a switch of an internal combustion engine (not shown) is closed, the armature 50 is energized and energized via the brush 20 slidingly contacting the commutator 52, and a rotational force is generated. This rotational force is transmitted to the rotary shaft, and an internal combustion engine (not shown) is started.

The field device 41 of the yoke 40 may be a DC direct winding type field device. With the configuration of the first embodiment, one end of the brush urging member 60 comes into contact with the brush urging member storage portion 11 when the brush urging member 60 is stored in the brush urging member storage portion 11. Since the brush urging member 60 is assembled to the brush urging member storage portion 11, the brush urging member 60 can be reliably and easily removed from the brush urging member storage portion 11 after the brush urging member storage portion 11 is assembled. Can be prevented by configuration.

Further, since the brush urging member storage portion 11 has a cylindrical shape or a polygonal cylindrical shape and projects from the inner peripheral surface of the end frame 10, the space inside the end frame 10 can be effectively utilized. Furthermore, since the brush urging member storage portion 11 is integrally molded with the end frame 10, the production can be facilitated.

Other embodiments will be described with reference to FIGS. 2 to 10. FIG. 2 is a second embodiment and is a brush biasing member 60.
FIG. 3 is a partial cross-sectional view showing the brush urging member storage portion 11, wherein the brush urging member 60 has a truncated cone shape whose diameter increases from the side in contact with the brush 20 to the brush urging member storage portion 11 side. Further, the brush urging member storage portion 11 has an inner diameter from the one end side of the brush urging member 60 that comes into contact with the inner circumference of the brush urging member storage portion 11 from the brush 20.
Has an inner diameter that increases toward the other end that contacts the commutator 52, and the inner diameter on one end side of the brush urging member housing portion 11 located on one end side of the brush urging member 60 is equal to the brush urging member 60.
Is smaller than the outer diameter of.

With this structure, since the brush urging member 60 has a truncated cone shape, the brush urging member accommodating portion 11 has a large diameter in the frustoconical shape of the brush urging member 60. In addition to contacting with the inner periphery of the brush urging member 60 and reliably fixing it, the brush urging member 60 does not come into contact with the inner periphery of the brush urging member accommodating portion 11 except for the large-diameter portion, and the brush can be flexibly bent. The biasing member 60 can be pressed against the commutator 52.

Further, the inner diameter of the brush urging member storage portion 11 is from the one end side of the brush urging member 60 which contacts the inner circumference of the brush urging member storage portion 11 to the other end side of which the brush 20 contacts the commutator 52. The inner diameter on the one end side of the brush urging member housing portion 11 located on the one end side of the brush urging member 60 is smaller than the outer diameter of the brush urging member 60. The brush urging member storage portion 11 is not scratched on the inner circumference thereof, and the brush urging member 60
Since the brush 20 can be flexed freely, the brush 20 can be suitably pressed against the commutator 52.

FIG. 3 shows a third embodiment, in which the brush biasing member storage portion 11 is formed separately from the end frame 10, and the brush biasing member is housed in the recess 10a of the end frame 10 from the axial direction of the armature (not shown). The convex portion 11a of the member storage portion 11 is fitted. FIG. 4 shows a fourth embodiment, and like the third embodiment, the brush urging member storage portion 11 is provided.
Is formed as a separate body from the end frame 10 and is provided in the through hole 10a forming the recess of the end frame 10 from the axial direction of the armature (not shown) in the convex portion 1 of the brush biasing member storage portion 11.
1a is fitted.

FIG. 5 shows a fifth embodiment, and like the third embodiment, the brush urging member housing portion 11 is formed separately from the end frame 10, but the end frame 10 has The convex portion 11a of the brush urging member storage portion 11 is fitted in the concave portion 10a in the radial direction of the armature (not shown). The commutator corresponding to the brush 20 in this case is a cylindrical tubular commutator 52 provided on one end surface of the armature core 51 as shown in FIG. 8 described later.

FIG. 6 shows a sixth embodiment. Like the fifth embodiment, the brush urging member storage portion 11 is formed separately from the end frame 10. From the radial direction of the armature (not shown) in the through hole 10a forming the concave portion, the convex portion 11 of the brush urging member storage portion 11 is formed.
a is fitted. In addition, the brush 2 in this case
The commutator corresponding to 0 is a cylindrical tubular commutator 52 arranged on one end surface of an armature core 51 as shown in FIG. 8 described later.

With the construction as in the third to sixth embodiments, the brush urging member storage section 1 is constructed.
Since 1 is formed separately from the end frame 10, the brush 20 can be easily assembled in the brush urging member storage portion 11. Further, since the convex portion 11a is provided at one end of the brush urging member housing portion 11, and the concave portion 10a provided in the end frame 10 is fitted to this convex portion 11a, the shape of the brush urging member 60 is reduced. The brush urging member storage portion 11 can be freely selected according to the
However, a number of brush biasing member storage portions 11 can be set.

FIG. 7 shows a seventh embodiment, in which the brush urging member housing portion 11 has a through hole 10b communicating with the outside of the end frame 10, and the brush urging member 60 is located in the through hole 10b. A restricting member 70 for restricting is screwed to the end frame 10 from the axial direction of the armature 50, and the restricting member 70 closes the through hole 10b. Figure 8
It is an eighth embodiment, and a regulating member 70 for regulating the position of the brush urging member 60 is screwed from the radial direction of the armature 50 to the end frame 10 as compared with the seventh embodiment, and the regulating member 70 allows the through hole 10b to be formed. It is blocked.

With the construction as in the seventh or eighth embodiment, the brush urging member accommodating portion 1 is formed.
Reference numeral 1 denotes a through hole 10b communicating with the outside of the end frame 10, and a restricting member 70 for restricting the position of the brush urging member 60 is arranged in the through hole 10b.
Since the through hole 10b is closed by the
By changing the total length of 0, the pressing force of the brush urging member 60 can be arbitrarily set.

FIG. 9 shows a ninth embodiment. The brush urging member is composed of a pair of permanent magnets 80 and 81 whose surfaces facing each other are magnetized to have the same polarity.
0 is the brush urging member storage portion 11 of the end frame 10.
, And the other permanent magnet 81 is embedded in the non-magnetic body 90, and the brush 20 is pressed against a commutator (not shown) by the repulsive force of the magnetic force of the permanent magnets. . With this configuration,
It is possible to apply a suitable pressure to the brush 20 by utilizing the repulsive force of the magnetic force of the permanent magnets of each other.

FIG. 10 shows a brush 2 according to a tenth embodiment.
0 and the brush biasing member 60 having the truncated cone shape described in the present embodiment, a heat dissipation member 91 is disposed. The heat dissipation member 91 is a good conductor that absorbs and dissipates heat, and is, for example, a copper rod. With this configuration, when the armature rotates, the heat generated by the brush 20 is dissipated by the heat dissipating member 91, and the heat transfer from the brush 20 to the brush urging member housing 11 can be reduced, and the brush urging can be performed. It is possible to prevent deformation of the member storage portion 11 due to heat generation. Furthermore, since the heat-dissipating member 91 is made of a good conductor that absorbs and dissipates heat, the heat capacity of the brush 20 and the good conductor is increased, the temperature rise of the brush 20 can be suppressed, and heat transfer can be reduced.

FIG. 11 shows an eleventh embodiment, which is different from the first embodiment in that the recess of the brush urging member housing portion 11 has
A protruding portion 11 protruding in the direction of the brush 20 and having a cylindrical shape
When the brush urging member 60 is mounted in the brush urging member storage portion 11, the protrusion 11b guides the brush urging member 60 to facilitate the assembly. The brush urging member 60 to be assembled is a coil spring as in the first embodiment, but the outer diameter of this coil spring is the outer diameter of only the first turn at the tip like the coil spring of the first embodiment. Are not the same, but they are all the same, and the coil spring has a low spring constant, that is, a long free length. In this embodiment, one end of the inner periphery of the brush urging member 60 is fixed to the outer periphery of the protruding portion 11b which is a part of the brush urging member storage portion 11.

A chamfer 11d is provided in the concave portion of the brush urging member storage portion 11 so that the brush urging member 60 can be easily inserted into the concave portion of the brush urging member storage portion 11. FIG. 12 shows a twelfth embodiment, which is different from the eleventh embodiment in that the protrusion 11b has a conical shape, and the brush urging member 60 can be easily assembled.

[Brief description of drawings]

FIG. 1 is a partial sectional view of a starter showing a first embodiment.

FIG. 2 is a partial cross-sectional view showing a biasing member and a brush biasing member accommodating portion showing a second embodiment.

FIG. 3 is a partial sectional view of a starter showing a third embodiment.

FIG. 4 is a partial sectional view of a starter showing a fourth embodiment.

FIG. 5 is a partial sectional view of a starter showing a fifth embodiment.

FIG. 6 is a partial sectional view of a starter showing a sixth embodiment.

FIG. 7 is a partial sectional view of a starter showing a seventh embodiment.

FIG. 8 is a partial sectional view of a starter showing an eighth embodiment.

FIG. 9 is a partial sectional view of a starter showing a ninth embodiment.

FIG. 10 is a partial sectional view of a starter showing a tenth embodiment.

FIG. 11 is a partial sectional view of a starter showing an eleventh embodiment.

FIG. 12 is a partial sectional view of a starter showing a twelfth embodiment.

[Explanation of symbols]

 10 End Frame 10a Recess (Through Hole) 10b Through Hole 11 Brush Energizing Member Storage Part 11a Convex Part 20 Brush 30 Brush Holding Body 40 Yoke 50 Armature 52 Commutator 60 Brush Energizing Member 70 Restricting Member 80 Permanent Magnet 81 Permanent Magnet 91 Heat dissipation member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masanobu Masami, 1-1, Showa-cho, Kariya city, Aichi Prefecture Nihondenso Co., Ltd.

Claims (12)

[Claims] 1. An armature having a commutator disposed on one end surface of an armature core, a brush that is in contact with the commutator and is electrically connected to a battery, and a brush holder that holds the brush. A brush urging member that urges the brush toward the commutator side, and an end frame having a brush urging member housing portion that houses the brush urging member therein, one end of the brush urging member A starter fixed to the brush urging member storage portion. 2. The starter according to claim 1, further comprising a heat dissipation member disposed between the brush and the brush biasing member. 3. The starter according to claim 2, wherein the heat dissipation member is a good conductor that absorbs and dissipates heat. 4. The starter according to claim 1, wherein the brush biasing member is a coil spring. 5. The starter according to claim 1, wherein the brush biasing member accommodating portion is molded integrally with the end frame. 6. The starter according to claim 1, wherein the brush biasing member storage portion is formed separately from the end frame. 7. The starter according to claim 5, wherein the brush biasing member accommodating portion has a cylindrical shape or a polygonal cylindrical shape, and protrudes from an inner peripheral surface of the end frame. 8. The brush urging member accommodating portion has a through hole communicating with the outside of the end frame, and a restricting member for restricting the position of the brush urging member is disposed in the through hole. The starter according to claim 5, wherein the through hole is closed by the. 9. The brush urging member accommodating portion is provided at one end thereof with a convex portion, and the concave portion provided on the end frame is fitted into the convex portion.
The listed starter. 10. The starter according to claim 1, wherein the brush biasing member is a pair of permanent magnets. 11. The starter according to claim 1, wherein the brush biasing member has a truncated cone shape. 12. The brush urging member storage portion has an inner diameter that allows the brush to contact the commutator from one end side of the brush urging member that contacts the inner circumference of the brush urging member storage portion. It has a frusto-conical shape that increases toward the end side, and the inner diameter of one end side of the brush urging member storage portion located at one end side of the brush urging member is smaller than the outer diameter of the brush urging member. The starter according to claim 1, which is characterized in that: