JP2583247Y2 - Starter - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a starter for starting an engine, and more particularly, to a center line connecting the centers of two mounting holes formed in a mounting flange with the center of gravity of the starter due to offset of a motor or the like. The improvement of the reduction type starter which is offset.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 4 and 5, when a starter 1 is mounted on a vehicle body with two bolts 2, the starter 1 is mounted in a spigot hole of a spigot portion 3 for determining a mounting position of the starter 1. In general, the formation positions of the bolt holes 5 and 5 formed in the flange portion 4 are set to 180 ° positions with the spigot holes interposed therebetween.

Further, even when the formation position of the bolt hole 5 cannot be set at the 180.degree. Position, as shown in FIGS. The two sides of the two bolt holes 5 and 5 of the flange portion 4 divided by the center line L1 are formed as equal as possible, and a dimension R on the left side of the center line L1 is formed as shown in FIG.
1 and the right side dimension R2 are designed to have a shape with the smallest possible difference. This is because the load applied to the mounting flange portion 4 due to vibration during operation is well-balanced.

[0004]

However, in recent starters, reduction type starters incorporating a speed reduction mechanism have been frequently used in order to achieve light weight, compactness and high efficiency. That is, as shown in FIG. 4, FIG. 5 and FIG. 7, the reduction type starter 1 is often such that the motor 6 is largely offset from the center of the pinion gear or the center of the spigot, so that the center of gravity G of the starter 1 is It will be located far from the center or the center of the spigot. However, since the shape of the mounting flange portion 4 of the starter 1 is designed based on a conventional concept, the center of gravity G of the starter 1 is further shifted from the center of the pinion gear or the center of the spigot.

For this reason, as shown in FIG. 6, the load applied to the mounting flange portion 4 by the vibration is the peak M of the load distribution on the center of gravity side.
A large difference D2 occurs between 1 and the peak M2 of the load distribution on the opposite side. As a result, a large unbalanced state occurs, and fretting is likely to occur in the mounting flange portion 4, and a defect such as razor is likely to occur in the spigot portion. In severe cases, the flange portion may be chipped or cracked. .

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional problems, and has a mounting flange portion formed by taking the center of gravity of a starter into consideration. It is an object of the present invention to provide an improved load distribution applied to a mounting flange portion in a vibration state. The gist of the invention is that two centers of gravity of a starter are formed in the mounting flange portion by a motor offset or the like. A reduction type starter offset with respect to a center line connecting the centers of the mounting flanges, wherein the flange width around the spigot portion on the starter center of gravity side of the mounting flange portion is formed larger than the flange width around the spigot portion on the opposite side. It is a featured starter.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments shown in FIGS. 1 to 3. In the drawings, reference numeral 11 denotes a reduction type starter according to the present invention,
And a housing 13 such as a pinion gear mounted on the drive shaft side of the motor 12, a spigot portion 14 continuous with the housing 13, and a mounting flange portion 15 formed around the upper end of the spigot portion 14. I have.

[0008] Reference numerals 16 and 16 denote bolt mounting holes formed in the mounting flange portion 15 and sandwich the spigot portion 14 therebetween.
The center line F connecting the centers of the mounting holes 16 and 16 is displaced from the center O of the spigot portion 14 toward the motor 12, that is, in the direction of the center of gravity G of the starter 11. 17A is a flange portion of the mounting flange portion 15 around the spigot portion 14 on the side of the center of gravity G. Is formed.

By adopting the above-described configuration, the load distribution generated by the vibration at the mounting flange portion 15 of the starter 11 can be reduced as shown in FIG. The difference D1 between the peaks M1 and M2 of the load distribution generated on both sides of the center line F connecting the centers of the holes 16 and 16 is small. This difference D1 is larger than the difference D2 between the peaks M1 and M2 in comparison with the load distribution generated by vibration in the conventional mounting flange shown in FIG. 6, and the starter 11 according to the present invention. It can be seen that is mounted quite well.

[0010]

As described above, the starter according to the present invention is a reduction type starter in which the center of gravity of the starter is offset with respect to the center line connecting the centers of the two mounting holes formed in the mounting flange due to the offset of the motor or the like. Since the flange width around the spigot portion on the center of gravity side of the starter of the mounting flange portion is formed larger than the flange width around the spigot portion on the opposite side, the load distribution of the mounting flange portion in a vibrating state Is improved, the starter can be mounted in a well-balanced manner, and the durability is improved.

[Brief description of the drawings]

FIG. 1 is a plan view of a starter according to the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a distribution diagram of a load generated by vibration at a mounting flange portion.

FIG. 4 is a plan view of a conventional starter.

FIG. 5 is a front view of the starter.

FIG. 6 is a distribution diagram of a load generated by vibration at a mounting flange portion of the starter.

FIG. 7 is a plan view of a conventional different starter.

FIG. 8 is an explanatory plan view of a mounting flange portion of a conventional starter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Starter 12 Motor 13 Housing 14 Flange part 15 Mounting flange part 16 Mounting hole 17A Flange part around the spigot part on the center of gravity side H1 Width of the same flange part 17B Flange part around the spigot part opposite to the center of gravity H2 Width of the same flange part F Center line connecting the centers of the two mounting holes O Center of the spigot G Center of gravity

Claims (1)

(57) [Scope of request for utility model registration] 1. A reduction type starter in which the center of gravity of a starter is offset with respect to a center line connecting the centers of two mounting holes formed in a mounting flange portion by an offset of a motor or the like, wherein the starter gravity side of the mounting flange portion. Wherein the flange width around the spigot portion is larger than the flange width around the opposite spigot portion.