JPH0439423Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to an ignition advance device for vehicles, and in particular, the cover surrounding the end of the crankshaft is made as small as possible,
The present invention relates to a vehicle ignition advance device that reduces the size and weight of a crankcase.

[Prior Art] Ignition signal devices are used in place of interrupters in contact type ignition devices such as distributors. This ignition signal device is equipped with an ignition position generator on the rotating side of the engine and an ignition detector consisting of a pick-up coil on the stationary side, and detects changes in the electromotive force of the signal detector caused by the ignition position generator. It is used as a signal.

[Problems to be solved by the invention] By the way, in the conventional mounting device for the starting clutch mechanism and the ignition advance mechanism in Utility Model Publication No. 59-33902, the starting clutch mechanism and the ignition advance mechanism are attached to the end of the crankshaft. and were fastened together with bolts. As a result, the width of the engine becomes large, which is disadvantageous in that a large installation space is required.

In addition, in cases where an ignition position generator made of a plate-shaped body is attached to the outside of the ring gear of the crankshaft, and a signal detector is attached to the crankcase side, the plate-shaped body and the ring gear are formed to have approximately the same diameter. As a result, when the signal detector is provided outside the outer circumferential surface of the plate-shaped body, the enclosing cover becomes large, making it impossible to save installation space and increasing material costs.

[Purpose of the invention] Therefore, in order to eliminate the above-mentioned inconvenience, the purpose of this invention is to install a one-way starter clutch with a small diameter and a ring gear for a starter with a large diameter on the outer periphery of one end of the crankshaft from one end side. An ignition position generator made of a plate-shaped body is provided on the outer surface of the starter clutch, and a signal detector is provided on the inner surface of the cover surrounding one end of the crankshaft on the outer periphery of the starter clutch at a position corresponding to the outer surface of the ring gear. By installing the present invention, it is possible to realize an ignition advance device for a vehicle, which can reduce the size and weight of the crankcase by making the cover smaller, and can reduce costs.

[Means for Solving the Problems] To achieve this purpose, this invention provides an ignition system that obtains an ignition signal using an ignition position generator provided on the rotating side of the engine and a signal detector provided on the stationary side of the engine. In the advance angle device, a one-way starter clutch with a smaller diameter and a starter ring gear with a larger diameter of a self-starter are sequentially installed on the outer periphery of one end of the crankshaft, and a plate-shaped body is provided on the outer surface of the starter clutch. The present invention is characterized in that an ignition position generator is provided, and a signal detector is mounted on the inner surface of a cover surrounding one end of the crankshaft on the outer periphery of the starter clutch at a position corresponding to the outer surface of the ring gear.

[Function] By configuring as described above, the cover that surrounds the end of the crankshaft can be made smaller, which reduces the width of the engine after the cover is attached, contributing to miniaturization and weight reduction, as well as saving space for installing the engine. savings.

[Example] Hereinafter, an example of this invention will be described in detail based on the drawings.

FIG. 1 shows a first embodiment of this invention. In FIG. 1, 2 is an engine, 4 is a crankcase, and 6 is a crankshaft. As is clear from FIG. 1, a one-way starter clutch 8 with a small diameter and a starter ring gear 22 with a large diameter of a self-starter (not shown) are sequentially attached to the outer periphery of one end 6a of the crankshaft 6 from the one end 6a side. , an ignition position generator 10 made of a plate-like member is provided on the outer surface 8A of the starter clutch 8. At this time,
The starter clutch 8 and the ignition position generator 10 are fixed to each other by a fixing member 14 such as a rivet via an auxiliary member 12, and the outer circumferential surface of the ignition position generator 10 is provided with an uneven shape so that the ignition position generator 10 can be fixed to the ignition position generator 10 by changing the electromotive force. Formed to extract the ignition signal.

Further, a signal detector 18 made of a pick-up coil is mounted on the inner surface 16B of the cover 16, which surrounds the end 6a of the crankshaft 6 on the outer periphery of the one-way starter clutch 8 and at a position corresponding to the outer surface of the ring gear 22. However, the structure is such that the ignition signal can be extracted without changing the shape of the outer surface 16A of the cover 16, particularly the end surface portion. Note that the reference numeral 20 is a pin for positioning the ignition position generator 10 and the auxiliary member 12.

Next, the effect will be explained.

First, the ignition position generator 10 is mounted on the outer surface 8A of the starter clutch 8, and the signal detector 18 is mounted on the inner surface 16B of the cover 16. Then, the cover 16 is attached to the crankcase 4 so as to surround one end 6a of the crankshaft 6.

Then, when the engine 2 is started, the one-way starter clutch 8 is rotated by the starter motor (not shown), the crankshaft 6 is also rotated, and the ignition position generator 10 attached to the starter clutch 8 is also rotated. Ru. Then, the ignition position generator 10 and the signal detector 1 provided on the cover 16
The ignition signal is taken out by 8.

As a result, the ignition position generator and signal detector can be installed inside the cover without changing the outer shape of the cover, and the width of the engine can be made smaller than before, making the engine more compact. It also contributes to saving installation space.

Furthermore, since the engine is slim, the degree of freedom in mounting is increased, and the ease of mounting can also be improved.

FIG. 2 shows a second embodiment of this invention. In this second embodiment, parts that perform the same functions as those in the first embodiment described above are given the same reference numerals and will be explained.

The feature of this second embodiment is that the signal detector 18 is mounted on the inner surface 16B of the cover 16, and the signal detector 18 is mounted at a position corresponding to the outer surface 22A of the starter ring gear 22 and in the one-way starter. It is attached to the outer circumference of clutch 8.

That is, a large-diameter starter ring gear 22, a small-diameter one-way starter clutch 8, and a small-diameter ignition position generator 10 are sequentially attached to the circumferential surface of one end 6a of the crankshaft 6, and the one-way starter clutch 8 and ignition position generator 10 are installed in sequence. When the signal detector 18 is located on the outer periphery of the generator 10, it is provided in a position corresponding to the outer surface 22A of the ring gear 22.

This allows the cover to be made smaller than in the past, making it possible to downsize the crankcase, contributing to weight reduction and cost reduction.

Further, wiring of the lead wires of the signal detector becomes easy and handling becomes simple.

Note that this invention is not limited to the above-mentioned first and second embodiments, and can be modified in various ways.

For example, in the first embodiment of this invention, it was explained that a fixing device such as a rivet was used to fix the ignition position generator made of a plate to the outer surface of the starter clutch. Other fasteners can also be used.

[Effects of the invention] As explained in detail above, according to this invention, a one-way starter clutch with a smaller diameter and a starter ring gear with a larger diameter of a self-starter are sequentially provided on the outer periphery of one end of the crankshaft from the one end side. An ignition position generator made of a plate-shaped body is installed on the outer surface of the starter clutch, and a signal detector is installed on the inner surface of the cover that surrounds one end of the crankshaft on the outer periphery of the starter clutch at a position corresponding to the outer surface of the ring gear. The cover can be made smaller than before, the crankcase can be made smaller and lighter, and costs can be reduced. Further, the mounting space for the engine can be saved, the degree of freedom in mounting is increased, and the ease of mounting can be improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of an ignition advance device showing a first embodiment of this invention. FIG. 2 is a schematic cross-sectional view of an ignition advance device showing a second embodiment of this invention. In the figure, 2 is the engine, 4 is the crankcase, 6 is the crankshaft, 8 is the starter clutch, 1
0 is an ignition position generator, 14 is a fixture, 16 is a cover, and 18 is a signal detector.

Claims (1)

[Scope of utility model registration request] In an ignition advance device that obtains an ignition signal using an ignition position generator installed on the rotating side of the engine and a signal detector installed on the stationary side, a one-way starter with a small diameter is placed on the outer periphery of one end of the crankshaft. A clutch and a starter ring gear with a large diameter of the self-starter are sequentially provided, and an ignition position generator made of a plate is provided on the outer surface of the starter clutch, and the ignition position generator is provided at a position corresponding to the outer surface of the ring gear and on the outer periphery of the starter clutch. An ignition advance device for a vehicle, characterized in that a signal detector is attached to an inner surface of a cover surrounding one end of the crankshaft.