JPS6353192A - Pedal for bicycle - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a bicycle pedal, and more specifically, to an attempt to improve the structure of the bearing portion thereof.

[Prior Art] In conventional bicycle pedals, a pedal shaft is inserted into a synthetic resin pedal body, and a ball bearing using steel balls is interposed between the pedal shaft and the pedal body to ensure smooth movement of the pedal body. I was trying to make it rotate.

[Problems to be Solved by the Invention] According to the above-mentioned prior art, (a) ball bearings are expensive, which causes high costs, and (b) a large number of steel balls are arranged in a cup-shaped bearing for one ton. After fixing the bearing with grease, etc., the bearing was inserted into the pedal body, which resulted in a double assembly process and poor work efficiency. There was a problem.

[Measures to solve the problem] Therefore, the present invention includes a pedal body 1 made of a synthetic resin bag.

A pedal shaft 2 that rotatably supports the pedal body 1, a sliding body 4 that screws into a threaded portion 3 formed at the tip of the pedal shaft 2, a pedal body 1, a pedal shaft 2, and a pedal body 1.
The pedal body 1 has a shaft hole 6 in the center through which the pedal #112 is inserted, and a shaft hole 6 at both ends of the shaft hole 6. On the other hand, the pedal shaft 2 has a stepped portion 8 with a diameter larger than that of the shaft hole 6 on the opposite side of the threaded portion 3. Concave arcuate surfaces 9a are formed on the surfaces of the portion 8 and the sliding contact body 4 that face each other.

9b, and the bearings 5a, 5b are cup-shaped to be fitted into the O-receiving recesses 7a, 7b, and have through holes 10a, 10b in the center through which the pedal shaft 2 is inserted. Around the pedal shaft 2 and the sliding contact body 4, round bar-shaped protrusions 11, 11, etc. with rounded tips are arranged in parallel in a ring shape, and the whole is integrally molded of synthetic resin. The projections 1 of the bearings 5a, 5b are formed on the concave arcuate surfaces 9a, 9b.
A bicycle pedal A is constructed by slidingly contacting each other.

[Protrusions 11, 11 of the working bearings 5a, 5b and the pedal shaft 2
Since the concave arc-shaped surfaces 9a and 9b of the sliding body 4 rub against each other in point contact, the frictional resistance is reduced and the pedal body 1 rotates smoothly.

[Example Embodiments of the present invention will be described below based on the drawings.

The pedal body 1 is formed of a synthetic resin into the shape of a rectangular parallelepiped frame with a hollow center, and a cylindrical portion is provided at the center, and a shaft hole 6 is bored inside. Bearing accommodation recesses 7a+7b having a larger diameter than this are formed at both ends of the shaft hole 6. In addition, there are anti-slip protrusions 1 on both sides of the pedal body 1.
a, 1a, . . . are provided protrudingly.

On the other hand, the pedal @2 has a base portion 2a that is larger in diameter than the shaft hole 6 and smaller in diameter than the bearing accommodation recess 7a, and a narrow diameter portion 2 that is inserted into the shaft hole 6.
b, and a threaded portion 3 at the tip thereof, and a nut-shaped sliding member 4 is screwed into the threaded portion 3. Then, concave arcuate surfaces 9a and 9b are formed on the mutually facing surfaces of the step portion 8 formed by the base portion 2a and the narrow diameter portion 2b of the pedal shaft 2 and the sliding body 4, respectively. Note that the threaded portion 2c on the base 2a side is for connecting to a gear crank (not shown) of a bicycle.

Further, the bearings 5a and 5b are cup-shaped, and their outer shape corresponds to the bearing accommodating recess 7a of the pedal body 1.

7b, and is press-fitted into the bearing housing recesses 7d, 7b. Through holes 10a, 10b are formed in the center for the pedal shaft 2 to pass through, and the through holes 10a, 10b are formed in the center.
a, round bar-shaped projection 11 with a rounded tip around 10b.
11... are arranged in parallel at regular intervals in a ring shape.

The bearings 5a, 51) are integrally molded of nylon, polyacetal, or a highly wear-resistant synthetic resin mixed with a glass region @1 if necessary. Note that this bearing 5a
, 5b are divided into two parts by forming notches 12, 12, .

Therefore, when assembling the bicycle pedal A of the present invention, first, the bearing housing recesses 7a and 7b of the pedal body 1 are assembled.
The bearings 5a and 5b are press-fitted.

Then, the pedal shaft 2 is inserted into the shaft hole 6 from the bearing housing recess 7a side. Next, the sliding body 4 is screwed onto the threaded portion 3 of the pedal shaft 2 that protrudes into the bearing housing recess 7b and tightened, so that the sliding body 4 and the concave arcuate surfaces 9a, 9 of the pedal shaft 2 are tightened.
b is brought into sliding contact with the protrusions 11, 11, . . . of the bearings 5a, 5b. At this time, if the tightening force of the sliding contact body 4 is too strong, the rotation of the pedal body 1 becomes heavy, and if it is too weak, it causes play in the same rotation.

It is necessary to adjust the strength to an intermediate level. In addition.

In addition to the sliding body 4, a washer 13° nut 14 is attached to the threaded portion 3 of the pedal shaft 2, and these are for preventing the sliding body 4 from loosening. In addition, the bearing housing recess 7b
A cap 15 is fitted on the holder.

[Effects of the Invention] As explained above, according to the present invention, since the pedal shaft and the like are supported by the protrusions of the bearing in a point contact manner, the frictional resistance between the two is reduced. It is possible to rotate the pedal body smoothly with light friction. Therefore, there are effects such as contributing to cost reduction, simplifying the pedal assembly work, and reducing the weight of the pedal.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an exploded perspective view, FIG. 2 is a vertical cross-sectional view of an assembled state, and FIG. 3 is a perspective view of a bearing. l...Pedal body, 2...Pedal shaft, 3...
・Threaded portion, 4... Sliding body, 5a, 5b... Bearing, 6... Shaft hole, 7a, 7b... Bearing housing recess,
8...Stepped portion, 9a, 9b...Concave arcuate surface, 10
a, 10b...through hole, 11.11...protrusion, A...bicycle pedal. Patent Applicant Rimi Kanigyo Co., Ltd. Kyu 2 ZuzuΔ Kuku 3 Figure

Claims (1)

[Claims] A pedal body made of synthetic resin, a pedal shaft that rotatably supports the pedal body, a sliding body that screws into a threaded portion formed at the tip of the pedal shaft, the pedal body, the pedal shaft, and the pedal body. The pedal body has a shaft hole in the center through which the pedal shaft is inserted, and bearings with a larger diameter are provided at both ends of the shaft hole. On the other hand, the pedal shaft has a stepped portion having a diameter larger than that of the shaft hole on the opposite side of the threaded portion, and a concave arc-shaped surface is formed on the mutually facing surfaces of the stepped portion and the sliding contact body. The bearing has a cup shape that is fitted into the bearing housing recess, and has a through hole in the center through which the pedal shaft is inserted, and a round bar-shaped projection with a rounded tip is formed around the through hole. 1. A bicycle pedal, characterized in that a plurality of bearings are arranged side by side in an annular shape, the whole is formed by integral molding of synthetic resin, and the protrusions of the bearing are brought into sliding contact with the concave arc-shaped surfaces of the pedal shaft and the sliding contact body, respectively.