JPH0284035A - Neck structure of bicycle generator case - Google Patents

Abstract

PURPOSE:To prevent direct application of load onto the neck section when a bearing is pressure inserted by pressure fitting the bearing axially to the case neck section and projecting ribs, which are subjected to the pressure fitting load of the bearing and deformed to support the bearing, from the inner circumferential face of the case neck section. CONSTITUTION:When a bearing 10 is pressure fitted, it contacts with a rib 12a and pressed in the axial direction and thereby the rib 12a deforms to absorb axial load being applied onto a spacer 12 and to fine adjust the pressure fitting position of the bearing 10. Consequently, the neck section 6 is protected from crack or whitening due to pressure fitting of the bearing 10 thus preventing the product reliably from being rejected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a neck structure of a case for supporting a rotating shaft that receives rotational force from the bicycle side in a bicycle generator.

[Prior Art and Problems to be Solved by the Invention] Generally, in this type of bicycle generator, the rotating shaft on which the beating roller on the generator side that makes rolling contact with the tire side of the bicycle is attached to the neck of the case. It is designed to be rotatably supported via a bearing. However, in the past, these devices had a structure in which the bearing was simply press-fitted into the arc-shaped inner circumferential surface of the case neck, so the load during press-fitting was applied directly to the case neck, resulting in cracks in the neck. One problem is that it turns white. And this phenomenon is
This is particularly noticeable when the case is molded using a synthetic resin material, and therefore some measure must be taken to cope with the press-fitting load.

[Means for Solving the Problems] In view of the above-mentioned circumstances, the present invention was devised for the purpose of providing a neck structure for a bicycle generator case that can eliminate these drawbacks. In a bicycle generator case in which a rotating shaft that rotates in response to rotational force from the case is rotatably supported in the neck of the case via a bearing, the bearing is press-fitted into the neck of the case in the axial direction. The case is characterized in that the inner circumferential surface of the neck of the case is provided with a protruding rib that deforms under pressure to support and hold the bearing.

According to the present invention, this configuration prevents the press-fitting load from directly acting on one neck portion when the bearing is press-fitted.

[Example] Next, in drawing 0, which describes an example of the present invention based on the drawings, 1 is a bicycle generator, and the bicycle generator 1 has a power generation mechanism section 2, which will be described later. The bicycle generator 1 case is constructed by arranging the rotating shaft and the raising/lowering axis of the raising/lowering mechanism part 3 in a parallel relationship with each other. It is comprised of an upper case 4 made of synthetic resin that houses both the folding mechanism part 3 and a lower case 5 made of synthetic resin to close the lower opening of the upper case 4. Here, the upper case 4 has a neck part 6 that supports the rotating shaft 9 of the first power generation mechanism part 2, a half body part 7 in which the power generation mechanism part 2 is housed, and a second body part 8 in which the tilting mechanism part 3 is housed. It is made up of.

The neck portion 6 has a rotating shaft 9 equipped with a pair of upper and lower oil-less bearings 1.
0, the inner diameter of the portion of the neck portion 6 into which the bearing 10 is inserted is slightly larger than the outer diameter of the bearing 10, Furthermore, the inner wall becomes lower toward the press-fitting start end of the bearing 10.

That is, a plurality of ribs 11 are formed protruding from each other at predetermined intervals in the circumferential direction, and are long in the vertical direction and are lower toward the upper and lower ends and have a mountain-like shape in a horizontal cross-sectional view. When the bearing 1o is press-fitted from each of the upper and lower ends of the neck portion 6, the bearing 1o is press-fitted with the rib 11 pressed and deformed in the outer radial direction, thereby receiving a load at the time of press-fitting.

It supports and holds the press-fitted bearing 1o. Furthermore, a plurality of spacers 12 protrude from the neck portion 6 and are positioned between adjacent ribs 11 to determine the press-fitting positions of the upper and lower bearings 10 . In other words, the press-fitted bearing 10
is positioned with its press-fitting end surface in contact with the upper and lower end surfaces of the spacer 12, and a rib 12a is also formed protruding from the bearing abutting surface of the spacer 12. When the bearing 10 is press-fitted, the bearing 10 contacts the rib 12a and presses it in the axial direction, and the rib 12a deforms in response to this, thereby absorbing the axial load that the spacer 12 receives, and The press-fitting position of the bearing 10 can be finely adjusted. Furthermore, a grease reservoir 1 for storing lubricating grease is provided in the gap formed by the adjacent spacer 12.
3 is formed. In FIG. 1, reference numeral 14 indicates a drive roller fixed to the tip of the rotating shaft 9 via a nut 14a, and 15 indicates a rubber cap that is placed over the drive roller 14.

On the other hand, a plurality of armatures 18, 18a are provided in the semicircular portion 7 in a radial cylindrical manner in the coil portion 17 in order to surround the magnet 16 fixed to the lower end of the rotating shaft 9.
The outer circumferential surface of the holder is designed to fit inside while sliding in contact with the holder.
- A guide boss 19 is provided protruding from the inner peripheral surface of the half body portion 7. When assembling the coil part 17, the coil part 17 is internally fitted into the half body part 7 so that the guide boss 19 is positioned between the armatures 18 and 18a. It is supposed to be done. And armature 18.18a assembled in this way
is configured to be held by the lower case 5 to prevent it from coming off.

Furthermore, the amphibious trunk 7.8 is separated from the amphibian trunk 7.8 by a partition 20, and the one-half trunk 7 and the other trunk 8 are electrically connected to each other by a conductive plate 21 that is removably fitted to the partition 20. Conductive.

That is, the conductive plate 21 has a substantially U-shape and is fitted to the partition wall 20, but one side 21a on the side of the -half body part 7 contacts the armature 18 on the side of the coil part 17, and also I on the body 8 side
One end portion of a coil bomb 22 constituting the raising/lowering mechanism section 3 is engaged with one side 21b formed in the L-shape.

Reference numeral 23 denotes a holder that is fixed to the bicycle body, and one end of the holder 23 has a bushing 26 that rotatably fits into a shaft hole formed in the lower case 5 and a body part. The cylindrical portions 23a rotatably fitted into the shaft supports 8a formed at 8 are fitted so that they cannot freely rotate, thereby forming a tilting shaft parallel to the rotation shaft 9. However, the coil bullet @22 is further interposed on this raising/lowering shaft, and the other end side of the coil bullet @22 is engaged with the holder 23. Electrically, the power generating mechanism section 2 is electrically connected to the raising/lowering mechanism section 3 through the conductive plate 21, specifically, the coil section 17° armature 18, the conductive plate 21, the coil elastic machine 22, and the holder 23. It is designed to be grounded to the bicycle body side via.

On the other hand, the lower case 5 covers the entire lower opening of the upper case from below, and the lower case 5 covers one half of the body 7.
The sides are shaped like an inverted truncated cone.

A drain hole 24 is formed in the lower bottom surface, and an output terminal portion 25 is formed at least on the tilting mechanism portion 3 side of the inclined surface. Furthermore, a pair of screw holes 25 and a shaft hole 27 into which the bushing 26 is rotatably fitted are formed on the side of the other body part 8 of the lower case 5. Screw 2 from screw hole 25 to case 4
By screwing in 8, it can be screwed together. In Figure 1, 29 is an output terminal assembled to the output terminal portion 25a, and 30 is a tilting lever 3.
1 is a twisting bullet machine.

In the embodiment of the present invention configured as described above, the rotating shaft 9 is rotatably supported on the case neck 6 via the bearing 10. However, when the bearing 10 is press-fitted into the neck 6, The bearing 10 is press-fitted into a rib 11 formed protruding from the neck portion 6 in a press-deformed state, and is held in place by the rib 11 . Therefore, the load in the radial direction acting on the neck 6 during press-fitting is:
The press-fitting load of the bearing 10 is substantially absorbed by the press-deformed rib 11, so that the press-fitting load of the bearing 10 is hardly applied to the neck 6, and as a result, the neck 6 may be cracked or white due to the press-fitting of the bearing 10. It is possible to prevent the product from becoming defective, and it is possible to reliably avoid product defects.

Moreover, since the rib 11 protrudes a little closer to the press-fitting start end, press-fitting the bearing 10 becomes easier.
This can greatly contribute to preventing problems such as cracks occurring due to excessive load being applied to the open end of the neck portion 6 during press-fitting.

Furthermore, the press-fitted bearing 10 is positioned in the axial direction by spacers 12, but since the gap formed between adjacent spacers 12 serves as a grease reservoir 13, conventionally It is now possible to permanently supply grease to the bearing 10, which was previously impossible.
In addition to the rust-preventing effect of the rotating shaft 9, smoother rotational movement of the rotating shaft 9 can be ensured over a long period of time. Ribs 1 protruding from the bearing contact surface of the spacer 12 for further positioning
2a absorbs the press-fitting load in the axial direction of the bearing 10 by suppressing deformation, so it effectively avoids an unreasonable load being applied to the spacer 12 part, and also adjusts the press-fitting position of the bearing 10 to the rib. It is convenient because the amount of deformation of 12a allows adjustment to the optimum position without causing play.

In addition, in this embodiment, the generator 1 does not use any metal, but has upper and lower cases 4 made of synthetic resin.
5, which significantly contributes to the weight reduction of the product, but as mentioned above, it is arranged in such a way that it has a parallel rotation axis and a tilting axis. The power generating mechanism section 2 and the raising/lowering mechanism section 3 are installed in parallel in an upper case 4 separated by a partition wall 22, and the one-wheel mechanism section 2.3 is electrically connected by a conductive plate 21. Therefore, these two types of structural parts 2.3 are in a state where it is possible to ground them from the power generation mechanism part 2 via the lifting mechanism part 3, and the integrated synthetic resin top There is an advantage that the case 4 can be housed compactly.

Therefore, the upper and lower cases 4 and 5 can be made of synthetic resin that is easy to process, and since the case itself only needs to be the upper and lower cases 4.5, it is possible to greatly reduce the number of parts, and each of these This has the advantage that parts can be easily assembled.

Furthermore, in this embodiment, the upper end of the raising and lowering shaft of the raising and lowering mechanism section 3 is supported by the upper case 4, and the lower end thereof is supported by the lower case 5, so that the coil bomb 22 can be stored. In the raising/lowering mechanism section 3 that must be assembled in
This is advantageous because it not only facilitates its installation, but also allows the stored force of the coil bomb 22 to be dispersed.

[Operations and Effects] In summary, since the present invention is constructed as described above, the case body of one generator is made of a conductive metal member, and the case housing the power generating mechanism part is made of a conductive metal member as in the conventional case. The structure can be simple and the assembly can be made extremely easy without having to search for a complicated and troublesome assembly such as riveting the case for the raising/lowering mechanism part to the case. Furthermore, the power generation mechanism section and the tilting mechanism section will be housed in each half body within the upper case molded from non-conductive synthetic resin material, but each half body will be electrically Since they are connected, grounding can be established from the power generating mechanism section via the raising/lowering mechanism section, and therefore, even if the entire case is made of synthetic resin, the generator can be constructed without any problems.

[Brief explanation of the drawing]

The drawings show an embodiment of the neck structure of a bicycle generator case according to the present invention, and FIG. 1 is an overall front view with a part of the bicycle generator cut away. Figure 2 is a front sectional view of the upper case, Figure 3 is x, y. Z is the AA sectional view, BB sectional view, and C in Fig. 2, respectively.
-C sectional view, Fig. 4 is a perspective view of the conductive plate, Fig. 5 is a bottom view of the upper case, Fig. 6 is a vertical sectional view of the holder, Fig. 7 is X, Y
, Z are the front view, top view, and right side view of the lower case, respectively.
FIG. 8 is a perspective view showing how the holder is assembled into the lower case. In the figure, 1 is a generator, 2 is a power generation mechanism section, 3 is a lifting mechanism section,
4 is an upper case, 5 is a lower case, 6 is a neck part, 7 is a half body part, 8 is another body part, 9 is a rotating shaft, 10 is a bearing, 11 is a rib, 12 is a spacer, 12a is a rib, 13 is the grease injection part. and

Claims (1)

[Claims] 1) A rotating shaft that rotates in response to rotational force from the bicycle side,
In a bicycle generator case that is rotatably supported on the case neck via a bearing, the bearing is press-fitted into the case neck in the axial direction and assembled, and the inner circumferential surface of the case neck is attached. The neck structure of a bicycle generator case is characterized by a protruding rib that deforms under pressure when receiving the press-fitting load of the bearing and supports and holds the bearing. 2) The neck structure of a bicycle generator case according to claim 1, wherein the rib is set so that the amount of protrusion of the rib becomes smaller toward the press-fitting start end of the bearing.