JPS6026822A - One-way clutch - Google Patents

Abstract

PURPOSE:To facilitate molding and manufacture of the captioned clutch together with reduction of its cost, by forming the clutch body of a one-way clutch, used for the engine of a motorcycle, into two divisions consisting of a housing part and a plate part. CONSTITUTION:A one-way clutch 43 attached coaxially on a crankshaft 36 has the main body of a clutch consisting of, for example, a housing part 45 made of synthetic resin and a plate part 46 made of a plate. The hub part 48 of a starting gear can be put inside a circular opening part 47 at the center of the housing part 45, with free rotation. And also three concave parts 49 are formed at the equal intervals in the direction of a circumference, facing the opening part 47, a roller 50 is accommodated in each concave part 49 with free rotation, and each roller is pressed by a pushing rod 52 energized by a spring. On the other hand, the plate part 46 is formed with a tongue part 56 having an inner face inclining in the direction of rotation of the hub part 48 inserted into each concave part 49, and the plate part 46 is fixed to one side of the housing part 45 by a screw 54.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a one-sided clutch that is installed in, for example, the engine of a motorcycle.

As shown in Fig. 1 and Fig. 2 as a one-sided clutch of this scale, a boss portion 4 of a starting gear 3 is rotatably fitted into the center of a clutch body 2 that rotates integrally with the crankshaft l. A f31110 part 5 is provided, and a plurality of four parts 6 are provided on the inner peripheral surface of this opening 5, and a cam 17 formed on the M surface of each turning part 6 and a boss part 4 (between the peripheral surface) are provided. A roller 8 which is rotatably clamped in is housed in the roller 8, and this roller 8 is pressed by a spring 9 and a cap 10 in a tangential direction to the boss portion 4 to the circumferential surface, thereby starting the starting gear 3. A device that only allows power transmission from the side is known.

However, in the current specification one-sided clutch, the clutch body 2 is formed by cutting out the round bar-shaped button 1 side, so broaching is required to form the recess 6 and cam surface 7, and the nub ring Drilling is required to form the hole 17 that accommodates the hole 9. Therefore, the types of machining and the number of man-hours increase, resulting in cost) (t+).Furthermore, the entire clutch body 2, even the parts that do not require great mechanical strength, are made of metal. Overall, the quality was excessive, and there was still room for improvement not only in terms of cost but also in terms of weight.

The present invention was made based on these circumstances, and
The object of the present invention is to provide a one-way clutch that can reduce special machining, be easily manufactured, and not have excessive quality overall, and realize cost reduction and weight reduction.

That is, in order to achieve the above object, the present invention has a clutch main body having a two-part structure consisting of a housing part into which the one-rotation part O is rotatably fitted, and a plate part which is rotated integrally with the rotating shaft. A recessed portion for accommodating the rolling element is provided in the plate portion, and a tongue piece portion that enters the recessed portion and sandwiches the I11 moving element between the rotating portion side and the circumferential surface of the rotating portion is integrally formed by bending. It is characterized by

Side, bottom 1, one example of the present invention, "Nukuta Jl", [
An explanation will be given based on FIGS. 3 to 8 in which the invention is applied to a two-wheel motor vehicle.

In the figure, 21 is an arene, and this frame 21 pivotally supported the front wheel 22. It is bent greatly downward between the control fork 23 and the seat 24, and this 1g portion has a footrest plate 2.
5 is installed. In addition, pipe number 26t1 in Figure 1
A leg shield 110 is provided, and 27 indicates a cover that extends under the seat 24.

The rear part of the frame 21 is raised upward, and the front end of an engine unit 29 is pivotally supported at the lower part of this raised part 28. engine unit 29
The engine 30 is configured as an integral rigid body with a transmission case 32 that extends rearward from one end of the crankcase 31 of the engine 30, and a rear wheel 33 is attached to the rear end of the transmission case 32. is supported.

The piston 3 in the cylinder 34 is inside the crankcase 3z.
A crankshaft 36 that is rotationally driven by
A belt transmission 37 is attached. Further, a starting gear 39 is attached to the crankshaft 36 via a bearing 38, and this starting gear 39 meshes with a pinion gear 41 of a starting motor 4I via an intermediate gear 40. It is connected to the crankshaft 36 via 43. This one-way clutch 43 only allows power to be transmitted from the starter motor 41 toward the crankshaft 36, so when the starter motor 41 is operated, its rotation is decelerated and transmitted to the crankshaft 36, thereby starting the engine.

Details of the one-way clutch 43 are shown in FIGS. 5 to 8.

That is, 44 is the clutch body, and the crankshaft 36
It is coaxially attached to the top. This clutch body 4
4 has a two-part structure consisting of, for example, a housing part 45 made of synthetic resin and a plate part 46 made of sheet metal. The housing part 45 is molded into an annular shape having a constant thickness, and the boss part 48 of the starting gear 39, which constitutes the width of the rotating part, is located in a circular opening 47 opened at the center of the housing part 45. It is currently fitted. There is a gap of 1'ijl in the circumferential direction on the inner circumferential surface of the opening 47, and there is a gap of 3 (If, l, 0).
Recesses 49 . . . are formed, and each recess 49 . A roller 50 having a cylindrical shape, for example, as a roller W11 is accommodated in the recess 49 so as to be freely rotatable in the direction around the axis. In addition, in the tree implementation 511, as shown in FIG.
The roller 5 is narrowed slightly smaller than the diameter r of the roller 5.
Measures are taken to prevent the 0 from falling out of the recess 49.

Further, the housing part 45 has - of each recess 49...
Mounting grooves 51 (51) are integrally formed on the inner surface of the side, and these mounting grooves 51 are also opened on one side of the housing part 45 for die cutting, as shown in FIG. Pressure rods 52 are accommodated in the mounting grooves 51 so as to be able to protrude and retract into the recesses 49 . is biased in the direction of rotation.

On the other hand, the plate part 46 is fastened to one side of the housing part 45 via a screw 54, and a through hole 55 opened in the center is spline-engaged with the crankshaft 36. It is designed to rotate together with the The plate portion 46 is connected to the recessed portion 49.
and covers one side opening of the mounting groove 51, and this recess 4
9, and press the roller 5o into the mounting a'451.
2 J6 and spring 53 are accommodated and held respectively.

On the outer periphery of the plate portion 46, tongue portions 56 facing into the old capital 49 are integrally bent and formed by pressing at positions corresponding to the respective turning portions 49. The tongue piece part 5G is each turn part 49
A roller 50 is rotatably sandwiched between the boss portion 48 and the circumferential surface of the tongue portion 56.
The upper ie boss portion 48 is inclined so as to move closer to the circumferential surface as the upper ie boss portion 48 moves in the direction of rotation.

In such a one-way clutch 43, when the starting gear 39 is rotated in the direction of the arrow by the operation of the starter motor 41, the roller 50 is firmly engaged between the boss portion 48 and the tongue portion 56. So.

The rotation of the boss portion 48 passes through the roller 50 to the plate portion 46.
from the plate portion 46 to the crankshaft 36. Then, when the plate portion 46 is rotated together with the crank 1'+t+s 6 when the engine 30 is started, the tongue portion 56 rotates before the roller 50, so that the tongue portion 56 and the boss portion 48 are rotated. The supporting pressure of the roller 5 ( ) between the plate part 4 and the
6 will roll over against the boss portion 48, and no dynamic nozzle transmission will take place.

According to the one-turn clutch 43 having such a configuration, power is transmitted through the boss portion 48. through the roller 50 and the tongue portion 56 of the plate portion 46, so that the housing portion 45 simply passes through the roller 50. The function of holding the pressing rod 52 and the spring 53 can be limited. Therefore, since the housing part 45 does not require a large mechanical strength, it can be molded using synthetic resin material, aluminum, or the like. In addition, since the plate portion 46 is also a press-molded product, there is no need for several types of machining as in the past, and therefore the number of processing steps can be reduced, making it possible to reduce costs.

Furthermore, by adopting a two-part structure consisting of the clutch body 44f2', the eight housing portion 45 and the plate portion 46, each can be constructed from materials suitable for their functions, and therefore the overall quality is not excessive.

In this respect as well, it contributes to cost reduction and also enables weight reduction.

Further, in this embodiment, since the recess 49 and the mounting groove 51 are opened on one side of the housing part 45, the housing part 45
At the same time when forming the mold in Step 5, the recess 49 and the mounting! ,T7J?
j 51 can also be formed.

There is an advantage that -Ir='l is contributed by reducing the number of work steps.

In the above-mentioned embodiment, the housing part and the plate part are fixed by screwing f=J, but for example, if the housing part is made of synthetic resin, a protrusion is formed on one side of the housing part. R45T is installed in one piece, and the plate part is provided with a through hole that allows the first projection to be inserted, and after fitting this protrusion into the hole, it is pressed and pressed, so-called heat caulking. The housing part and plate part ′?
It may be fixed.

According to the present invention described in detail above, the clap-wood ear 1 has a two-part structure of a housing part and a plate part, so that
It can be said that the housing is simply transferred to 13 (/(,) and has only the function of 1'. Therefore, molding with resin, aluminum, etc. is required, and manufacturing is therefore easy. , with exceptional i: 4 Ire processing and processing man-hours are also small and σj, making it possible to reduce costs.

In addition, since the housing part and the plate part can be made from Tf (1"4) according to their respective functions, there is no excessive quality of the whole product, which also contributes to cost reduction and weight reduction. There are also advantages that can be realized.

[Brief explanation of the drawing]

Figures 1 and 2 are sectional views of a conventional example, Figures 3 to 8 show an embodiment of the present invention, Figure 3 is a side view of a motorcycle, and Figure 4 is a sectional view of an engine. Figure 5 is a front view of the one-way clutch. Figure 6 is a sectional view taken along the line ■-■ in Figure 5, and Figure 7 is a cross-sectional view of the
A cross-sectional view taken along the line ■-■ in the figure, and FIG. 8 is a cross-sectional view of the housing portion. 36... Rotating shaft (crankshaft), 44... Clutch body, 45... Housing part, 46... Plate part, 47... Opening part, 48... Rotating member (boss part),
49... recess, 50... rolling element (roller), 56...
・・Tanzabu section. Applicant's representative Patent attorney Takeshi Suzue 1 Figure 2 Procedural amendments, 1 I, 9.1h, y'% Commissioner of the Patent Office Manabu Shiga L; No. 58-132596 "2 Title of the invention One-way lunch 3 Relationship with the case of the person making the amendment Patent applicant (AO7") Yamaha Motor Co., Ltd. "1st generation" 111
Person (i) Assistant's Nu-1 Drawing 7, Contents of amendment (1) In the 9th line of the description, the phrase [pinion gear 4 of starter motor 41] was replaced with "pinion gear 4 of starter motor 41". 4
1 pinion gear 42”. (21 drawing medium temperature 4 is 1. 51g1-Fig. 6 and 7
[Correct the 9th sword 1<71 of the sword 11.]

Claims (1)

[Claims] An opening is provided in the center of the clutch body that rotates together with the rotating shaft, a rotating member is rotatably fitted into the 1iF1 opening, and four parts are formed on the inner circumferential surface of the opening,
In this recess, it is rotatably sandwiched between the inner surface of the recess and the circumferential surface of the rotating part.
The Q'x moving body is rotated around the circumferential surface of the rotating member, and as the clutch main body rotates, the rolling elements move toward the outer surface of the rotating member (when pressed against the circumferential surface, the clutch main body and the rotating part In the one-sided clutch that operates the two on one side, the clutch body has a two-part structure consisting of a housing part into which the rotating member is rotatably fitted, and a plate part which rotates integrally with the rotating shaft, In addition to forming the recessed portion in the housing portion, the plate portion is integrally bent and molded with a tongue portion that enters the recessed portion of the housing portion and sandwiches the rolling element with the circumferential surface of the rotary portion. A latte with a one-way rotation.