JPH0533752A - Ignition device fitting construction of motorcycle - Google Patents

Abstract

PURPOSE:To support an ignition coil integrated type plug cap with a shroud in simple and cheap constitution. CONSTITUTION:This ignition device fitting construction of a motorcycle is provided with a cooling fan 18 fitted to the crankshaft 16 of an engine 11, and divided two pieces of shrouds 9a, 9b fixed to an engine so as to cover its circumference. Further it is provided with an air intake port 10 formed on the one divided shroud 9a and an ignition coil integrated type plug cap 25 fitted on the shroud 9a. Furthermore, it is provided with an exhaust port 20 and an ignition plug inserting hole 21 formed on the other divided shroud 9b, and a damper member 24 arranged between both divided shrouds 9a, 9b and supporting the ignition coil integrated type plug cap 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a motorcycle,
The present invention relates to a mounting structure of an ignition device including an ignition coil integrated plug cap.

[0002]

2. Description of the Related Art An ignition device in which an ignition coil and a plug cap are integrally formed and a high tension cord is unnecessary is conventionally known. For example, in JP-A-62-51760, an ignition coil integrated plug cap in which an ignition coil and a plug cap are integrally formed in a case is attached to an engine ignition plug,
The case is supported and fixed to the shroud that covers the cylinder head of the engine directly or through an elastic member.

[0003]

In recent years, the shroud that covers the cylinder head of the engine is made of resin in order to reduce the weight and noise, and in order to prevent noise, the ignition coil integrated plug cap is directly attached to the shroud. Instead, a method of supporting while floating via an elastic member such as rubber is often adopted. However,
Since the vibration around the engine is particularly large, there is a problem that the rigidity of the ignition plug peripheral part of the shroud is increased and the plug cap comes off unless it is securely fixed with bolts, etc. Due to functionalization, the space around the engine is becoming narrower, and especially on the shroud head surface, it is difficult to insert tools such as a screwdriver or wrench for maintenance, and it is extremely difficult to fix the plug cap with bolts. ing. In order to solve this, it is conceivable to provide a stay on the ignition coil integrated plug cap and extend it to provide a mounting portion at a place where tools can be easily used, such as the engine side surface,
Since the vibration of the engine is large, a stay with considerably high rigidity is required. As described above, when it is attempted to fix the ignition coil integrated plug cap to the shroud, a high rigidity is required on the shroud and, in some cases, on the ignition coil side, resulting in an increase in cost.

The present invention solves the above problems and provides a mounting structure for an ignition device in a motorcycle which allows a shroud to support an ignition coil integrated plug cap with a simple and inexpensive structure. With the goal.

[0005]

To this end, the mounting structure of the ignition device in the motorcycle according to the present invention has a cooling fan 18 mounted on the crankshaft 16 of the engine 11.
And a divided shroud 9a, 9b that is fixed so as to cover the periphery of the engine 11 and is divided into two. Ignition coil integrated plug cap 25, and exhaust port 20 and spark plug insertion hole 21 formed in the other divided shroud 9b.
And a damper member 24 that is disposed between the split shrouds 9a and 9b and that supports the ignition coil integrated plug cap 25. It should be noted that the numbers added to the above configuration are for comparison with the drawings, and the configuration of the present invention is not limited thereby.

[0006]

In the present invention, for example, as shown in FIG.
With the split shroud 9b mounted on the engine 11 and the ignition plug 17 protruding from the ignition plug insertion hole 21, the split shroud 9b is fixed to the engine 11, and the ignition coil integrated plug cap 25 is attached to the split shroud 9a. The split shroud 9a is fixed to the split shroud 9b and the engine 11 so that the spark plug 17 is inserted into the plug cap 26. In the present invention, since the shroud is divided and the integral case is attached to the highly rigid shroud 9a fixed to the side surface of the engine, the plug cap 26 and the ignition plug 17 can be easily positioned, and the weight can be reduced. Since the ignition coil 30 having a large size is supported by the damper member 24, it is possible to absorb vibration and prevent the plug cap 26 from coming off.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 4 is a side view of a motorcycle to which the present invention is applied, where 1 is a head pipe, 2 is a front fork, 3 is a front wheel, 5 is a main frame, 6 is a seat, 7 is a rear wheel, and 8 is a rear wheel. Is a muffler, 9 is a shroud for covering the cylinder head of the engine according to the present invention, and an intake port 10 for taking in cooling air to the engine is formed. In addition,
The present invention is not limited to the scooter type shown.

FIGS. 1, 2 and 3 show an embodiment of a mounting structure for an ignition device in a motorcycle according to the present invention. FIG. 1 is a sectional view, FIG. 2 is a perspective view of a shroud and a case in FIG. 3 is an exploded perspective view of the component parts in FIG. 1.

In FIG. 1, 11 is an engine, 12 is a cylinder head, 13 is a cylinder block, 14 is a piston, 15 is a connecting rod, 16 is a crankshaft, and a spark plug 17 is attached to the cylinder head 12, and a crankshaft is provided. A cooling fan 18 is attached to 16. The shroud 9 that covers the engine 11
It consists of split shrouds 9a and 9b divided into two,
It is fixed to the engine 11 via a seal member 19 such as rubber. A cooling fan 18 is provided on one of the divided shrouds 9a.
An intake port 10 is formed so as to be opposed to the cooling fan 1, an exhaust port 20 and a spark plug insertion hole 21 are formed in the other divided shroud 9b, and the cooling fan 1 is linked with the crankshaft 16.
Rotate 8 and let the air flow as shown by the arrow in the figure, so that the engine 11
Is cooling. A damper member 24 made of rubber or the like is fixed to the upper part of the divided shroud 9b.

As shown in FIG. 2, a vertical support flange 22 having a groove portion 22a is formed on the upper portion of the divided shroud 9a.
And a horizontal support plate 23 are integrally formed. By inserting the locking portion 27a of the coil case 27 into the groove portion 22a, the coil case 27 is supported by the support flange 22.
And is fixed to the support plate 23. The ignition coil integrated plug cap 25 has a plug cap 26 and a coil case 27 that are integrally formed. As shown in FIG. 1, a resistor 28 and a connector 29 are inserted into the plug cap 26 from below. Then, the ignition coil 30 is provided in the coil case 27.
Is inserted, and the high voltage side terminal 31 is brought into contact with the head of the resistor 28. The ignition coil 30 includes the iron core 3
2, primary coil 33, secondary coil 34 and low voltage side terminal 3
Have 5. The elastic member 3 is provided below the plug cap 26.
6 is fixed. The elastic member 36 includes a tongue piece 36a that is press-fitted into the insertion hole 21, a tongue piece 36b that abuts on the split shroud 9b, and a fitting portion 36c that fits the ignition plug 17.
Have.

A method of mounting the ignition device of the present invention having the above-described structure will be described. First, as shown in FIG. 3, the divided shroud 9b is covered with the engine 11 so that the ignition plug 17 is projected from the ignition plug insertion hole 21. In this state, the divided shroud 9b is fixed to the engine 11. Next, with the ignition coil integrated plug cap 25 attached to the split shroud 9a, the split shroud 9a is fixed to the split shroud 9b and the side surface of the engine 11 so that the spark plug 17 is inserted into the plug cap 26. In the present invention, since the shroud is divided and the ignition coil integrated plug cap 25 is attached to the highly rigid split shroud 9a fixed to the engine, the positioning of the plug cap 26 and the ignition plug 17 is easy. In addition, since the ignition coil 30 having a large weight is supported by the damper member 24, it is possible to absorb the vibration and the plug cap 26
Can be prevented from coming off. Further, the spark plug 17 can be replaced by simply removing one of the divided shrouds 9a.

[0013]

As described above, according to the present invention, since the integral type case is attached to the highly rigid shroud fixed to the side surface of the engine, the positioning of the plug cap and the ignition plug is easy, Moreover, since the ignition coil, which is heavy in weight, is supported by the damper member, it is possible to absorb vibration and prevent the plug cap from coming off, and the spark plug can be replaced by simply removing one of the split shrouds. Therefore, the ignition coil integrated plug cap can be supported by the shroud with a simple and inexpensive structure.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a mounting structure for an ignition device in a motorcycle according to the present invention.

FIG. 2 is a perspective view of a shroud and a case in FIG.

FIG. 3 is an exploded perspective view of components shown in FIG.

FIG. 4 is a side view of a motorcycle to which the present invention is applied.

[Explanation of symbols]

9 ... Shroud, 9a, 9b ... Split shroud, 10 ...
Intake port, 11 ... Engine, 16 ... Crank shuff, 17
... spark plug, 18 ... cooling fan, 20 ... exhaust port, 2
DESCRIPTION OF SYMBOLS 1 ... Ignition plug insertion hole, 24 ... Damper member, 25 ... Ignition coil integrated plug cap, 26 ... Plug cap, 27 ... Coil case, 30 ... Ignition coil.

Claims (1)

Claim: What is claimed is: 1. A cooling fan attached to a crankshaft of an engine, a split shroud fixed to cover the periphery of the engine and divided into two, and one split shroud. An intake port, an ignition coil integrated plug cap attached to one split shroud, an exhaust port and an ignition plug insertion hole formed in the other split shroud, and the ignition coil disposed between the split shrouds. A mounting structure for an ignition device in a motorcycle, comprising: a damper member supporting an integrated plug cap.