JP3570582B2 - Automotive starter and method of mounting the same - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a starter for an automobile and a method for mounting the same.
[0002]
[Prior art]
A conventional method for mounting a starter for a vehicle will be described with reference to FIG.
The outer surface 101 of the side wall 100 of the internal combustion engine (engine) body is a flattened starter mounting surface, and the side wall 100 is provided with a starter fitting hole 2a close to the ring gear 1a. The starter 200 has a mounting frame 5a integrally assembled with the starter motor 4a, and a column-shaped hollow portion (fitting projection) 60a formed on the mounting frame 5a is fitted into a starter fitting hole 2a of the side wall 100. Has been inserted. Thereafter, in order to enable the pinion 3a and the ring gear 1a to mesh with each other, the mounting bolt 9a is inserted into the mounting hole 8a of the flange portion 7a protruding from the mounting frame 5a. Be concluded.
[0003]
As described above, in the conventional automobile starter, a mounting frame (also referred to as a starter housing) having a shape corresponding to a starter fitting hole or a mounting bolt hole opened in a side wall of an engine block or a clutch housing is fixed to the side wall. are doing.
The conventional mounting frame is a cast part having a complicated shape, and it is necessary to prevent the mounting frame from bending or deforming due to engine vibration, driving of the starter, engagement of the pinion and the ring gear, and the like. It is made of metal such as iron or aluminum with high strength and heavy weight.
[0004]
[Problems to be solved by the invention]
However, since the space for installing the starter in the engine room is different for each vehicle type, the relative positional relationship between the starter fitting hole and the mounting bolt hole and the shaft from the starter mounting surface on the side wall to the ring gear are adjusted accordingly. Conventionally, in most cases, it has been necessary to newly prepare a mounting frame (starter housing) every time the type of engine changes, because the directional distance and the like vary. The preparation and manufacture of such various types of mounting frames have been a major problem in terms of the complexity of the manufacturing process.
[0005]
Further, since the weight of the mounting frame is large, it has been difficult to reduce the weight of the automobile starter. In a conventional automobile starter, the mounting frame, which is a metal casting, is formed by cutting the outer peripheral surface fitted into the starter fitting hole or the surface abutting against the mounting surface 200 of the side wall 100 to ensure accuracy. Normal. However, performing such precision cutting work one by one has been a major problem in terms of complexity of the manufacturing process and increase in cost. Further, with the recent increase in the size and rotation of the starter motor, it has become more important to improve the cooling performance of the starter motor.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a first object of the present invention is to provide a starter for a vehicle and a method for mounting the starter, which does not require a change of a mounting frame irrespective of a model change of an engine. A second object of the present invention is to provide a starter for an automobile and a method of mounting the same, which can reduce the weight of the mounting frame while suppressing the bending and deformation of the mounting frame. It is a third object of the present invention to provide a starter for a vehicle and a method for mounting the same, which can simplify the manufacturing process of the mounting frame while avoiding the play. It is a fourth object of the present invention to provide a starter for an automobile capable of improving the cooling property of a starter motor and a method of mounting the same.
[0007]
Means for Solving the Problems and Effects of the Invention
According to a first configuration of the present invention, a yoke is provided between a starter housing also serving as a front bracket and an end frame also serving as a rear bracket to form a stationary magnetic path of a motor unit. A starter motor having an outer peripheral surface of the yoke tightly fitted in a starter fitting hole opened in a side wall of the clutch housing (including a clutch housing); and a mounting fixed to the outer peripheral surface of the yoke while being fastened to a mounting bolt hole of the engine. An automotive starter comprising a stay and a stay. According to this configuration, the following operation and effect can be obtained.
[0008]
First, since the yoke of the starter motor is tightly fitted to the starter fitting hole opened in the side wall of the engine (inlay fitting), the starter for the vehicle is held so that the starter for the vehicle cannot be displaced in the radial direction. The mounting frame (starter housing) of the starter does not need to have a function as a base member for fixing the entire starter to the side wall of the engine, and the weight and strength of the mounting frame can be remarkably reduced as compared with the related art. In addition, since the yoke has a constant diameter, it can be freely displaced in the axial direction to a desired position according to the engine model and engine room design. In other words, it is possible to cope with a change in the distance between the ring gear and the mounting surface of the side wall of the engine. Further, heat generated by the starter motor can be directly transmitted from the yoke to the side wall of the engine (or clutch housing) through the starter fitting hole, and the cooling performance of the starter motor is improved.
[0009]
Further, in this configuration, since the outer peripheral surface of the yoke and the outer surface of the side wall are fixed and fastened by the mounting stay so as not to be displaceable in the axial direction, the positioning and fixing of the yoke are easy, and the starter for the vehicle with respect to the side wall is also provided. Of the relative position in the axial direction can be easily realized.
Further, it is possible to save the trouble of forming the starter fitting hole and the mounting surface in the mounting frame by cutting.
[0010]
According to a second configuration of the present invention, in the method of mounting a starter for an automobile according to the first configuration, the relative position between the side wall and the yoke is adjusted by changing a shape of the mounting stay. I have.
For example, if the position of the mounting bolt holes on the mounting stay or the thickness of the mounting stay is adjusted, the position of the mounting bolt holes on the side wall is changed, or even if the distance between the outside surface of the side wall and the ring gear changes, the A starter can be attached.
[0011]
According to a third configuration of the present invention, in the method of mounting the automotive starter according to the first configuration, the relative position between the side wall and the yoke is adjusted by changing a fixing position of the mounting stay with respect to the yoke. It is characterized by:
For example, if the position of the mounting bolt hole for fixing the mounting stay to the yoke is changed, even if the distance between the outer surface of the side wall and the ring gear changes, the starter for an automobile can be mounted.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Preferred embodiments of the present invention will be described based on the following examples.
[0013]
【Example】
(Example 1)
Hereinafter, a starter for a vehicle and a method of mounting the same according to the present invention will be described with reference to FIGS.
Reference numeral 1 denotes an automobile starter, which includes a motor section (starter motor) 10, a starter mechanism section 11, and a magnet switch section 12.
[0014]
The motor unit 10 is a DC motor and is housed in a yoke 13. The yoke 13 has a cylindrical shape made of soft iron and forms a stationary magnetic path, and a mounting bolt hole 16 is formed on the outer peripheral surface of the yoke 13. The starter mechanism 11 is fixed to the front end surface of the yoke 13 and also serves as a front bracket, a speed reduction mechanism (not shown) housed in the starter housing 14, and the speed reduction mechanism. And a pinion 15 driven by the motor unit 10. Although the starter mechanism 11 actually has a more complicated mechanism, the structure and operation of the starter mechanism 11 are not the gist but are well-known, so that further illustration and description are omitted. 6 is a ring gear. The magnet switch section 12 includes an end frame 15 fixed to a rear end surface of the yoke 13 and also serving as a rear bracket, and a magnet switch (not shown) housed in the end frame 15. Since the structure and operation of the magnet switch itself are well known, further description is omitted. 7 is a terminal.
[0015]
Reference numeral 2 denotes a side wall of the engine, which has a starter fitting hole 20 and a pair of mounting bolt holes 21 around the starter fitting hole 20.
Reference numeral 3 denotes two mounting stays, each of which is formed of an L-shaped (angle) plate made of steel. As shown in FIG. 3, the mounting stay 3 has a pair of mounting bolt through holes 31 and 32. Reference numeral 33 denotes a flat first mounting surface of the mounting stay 3, which is in close contact with the outer side surface (mounting surface) 22 of the side wall. Reference numeral 34 denotes a second mounting surface of the mounting stay 3 having a partial cylindrical surface, which is in close contact with the outer peripheral surface of the yoke 13.
[0016]
Reference numeral 4 denotes a first mounting bolt, which passes through the mounting bolt through hole 31 of the mounting stay 3 and is fastened to the mounting bolt hole 22 of the side wall 2. Reference numeral 5 denotes a second mounting bolt, which passes through the mounting bolt through hole 32 of the mounting stay 3 and is fastened to the mounting bolt hole 16 on the outer peripheral surface of the yoke 13.
Thus, the automobile starter 1 is fixed to the side wall 1 of the engine.
[0017]
(Operation and effect of the embodiment)
If the thickness of the mounting stay 3 is changed, a change in the distance between the ring gear 6 and the side wall 2 can be absorbed. Even if the position of the mounting bolt hole 16 of the yoke 13 is changed, the same operation and effect can be obtained. Further, since the center of gravity of the automobile starter 1 in the axial direction is located in the yoke 13, the vibration of the automobile starter, particularly the motor section thereof, is reduced.
[0018]
(Modification)
Although the starter having the structure in which the motor unit 10 and the magnet switch unit 12 are arranged in tandem in the axial direction has been described, the arrangement position of the magnet switch unit 12 can be changed if it does not hinder the fixation to the side wall 2 of the automotive starter. is there.
In addition, various shapes can be used as the shape of the mounting stay 3, and in order to fix the mounting stay 3 to the yoke 13, in addition to the above-described bolt fixing, various known fixing methods such as caulking and press-fit welding can be applied. is there.
[0019]
Although the starter housing 14 is formed of an aluminum casting in the above embodiment, the starter housing 14 can be formed by resin molding or the like since the applied load can be greatly reduced.
(Example 2)
Another embodiment will be described with reference to FIG.
In this embodiment, an eccentric ring 8 is fitted to the yoke 13 by, for example, press fitting, and the eccentric ring 8 is tightly fitted to the starter fitting hole 2 in the side wall of the engine. Therefore, the eccentric ring 8 is a component included in the yoke according to the present invention or a component included in the side wall 2 of the engine.
[0020]
This makes it possible to displace the starter 1 for a vehicle in a direction perpendicular to the axial direction.
(Example 3)
Another embodiment will be described with reference to FIG.
In this embodiment, the mounting stay 9 has a flange shape having a boss portion 90 fitted to the yoke 13 and a flange portion 91 formed at one end of the boss portion 90, and is fixed to the yoke 13 by resistance welding or caulking. Things. By doing so, the mounting stay 9 can be formed as a single member, and the mounting process is simplified.
[Brief description of the drawings]
FIG. 1 is a side view showing a mounting structure of an automobile starter according to the present invention.
FIG. 2 is a front view of the automotive starter of FIG. 1;
3A is an axial sectional view of the mounting stay 3 of FIG. 1, and FIG. 3B is a front view thereof.
FIG. 4 is a front view showing a mounting structure of a starter for a vehicle according to a second embodiment.
FIG. 5 is a front view showing a mounting structure of an automotive starter according to a third embodiment.
FIG. 6 is a front view showing a mounting structure of a conventional automobile starter.
[Explanation of symbols]
1 is an automobile starter, 2 is an engine side wall, 13 is a yoke, 20 is a starter fitting hole, 21 is a mounting bolt hole formed in the side wall 2, and 3 is a mounting stay.

Claims (3)

A yoke is provided between a starter housing also serving as a front bracket and an end frame also serving as a rear bracket and forms a stationary magnetic path of a motor section. The yoke is provided in a starter fitting hole opened in a side wall of the engine . A starter for an automobile, comprising: a starter motor having an outer peripheral surface tightly attached; and a mounting stay fastened to a mounting bolt hole of the engine and fixed to an outer peripheral surface of the yoke. 2. The method according to claim 1, wherein a relative position between the side wall and the yoke is adjusted by changing a shape of the mounting stay. 2. The method according to claim 1, wherein a relative position between the side wall and the yoke is adjusted by changing a fixing position of the mounting stay with respect to the yoke.

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