JPS6032361Y2 - Starter operation mechanism of multiple carburetor - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a starter operating mechanism suitable for a multiple type carburetor, particularly a multiple type BS type carburetor.

The starter operating mechanism of a conventional multiple-load βS type carburetor, for example, as shown in FIG. A built-in spring 4 that constantly presses the plunger 3 in the fully closed direction to prevent the starter plunger 3 from jumping, and a built-in spring 4 that is disposed next to the mixing body 1 so as to be slidable in the horizontal direction in the drawing. A starter shaft 5 which is adapted to be held at a position corresponding to the fully closed or fully open position of the starter plunger 3 when a notch 5a or 5b provided at a predetermined portion of the starter shaft 5 engages with a locking piece 6; It is composed of a connecting piece 7, etc., which is fixed to the shaft 5 and whose tip engages with the end 3a of the starter plunger 3, and by sliding the starter shaft 5 in the left-right direction in the drawing, The starter plunger 3 is actuated, but since the built-in spring 4 constantly exerts a force pushing the starter plunger 3 in the fully closing direction, the change in the plunger closing force against the starter shaft loaf is caused by the third The result is a straight line a in the figure, which has the disadvantage that the starter operation load is extremely large and operation is difficult.

Further, as an improvement on this point, for example, as shown in FIG. When the starter plunger 3 is fully closed, the starter shaft 5 is moved to the overstroke position (notch 5a') on the left side of the drawing. is the locking piece 6
by moving the E-ring 8 to the position where it engages with the
The starter plunger 3 is moved to the left via the spring 9 and the connecting piece 7', and the spring 9 is compressed at this time, so that the starter plunger 3 is moved to the left by the spring 9.
When the starter plunger 3 is fully opened, the E-ring 8 and the connecting piece 7' are pressed by moving the starter shaft 5 to the right in the drawing.
The starter plunger 3 is carried through the starter plunger 3 so that the force that tries to close the starter plunger 3 becomes zero, and the change in the plunger closing force with respect to the starter shaft stroke is shown in Figure 3. In some cases, the operating load on the starter is significantly reduced because the line becomes like a broken line, but this is because the connecting piece 7' is slidably mounted on the starter shaft 5, which requires high machining accuracy. is required, and also has the disadvantage of requiring a large number of parts.

Furthermore, since the tip of the connecting piece 7' and the end 3a of the starter plunger 3 are simply engaged, there is also a drawback that rattling is likely to occur when the starter plunger 3 is fully opened.

In view of the above-mentioned problems, the present invention aims to provide a starter operating mechanism that not only greatly reduces the starter operating load but also has relatively rough machining accuracy and has a small number of parts. , based on the embodiment shown in FIG. 4, the same members as those in the conventional example are given the same reference numerals, and the tip 7 is the end 3a of the starter plunger 3.
The reference numeral 10 designates a leaf spring which is fixed to the connecting piece 7 and whose tip presses the stopper portion 3a' of the end 3a of the starter plunger 3 in the fully closing direction.

Since the starter operating mechanism according to the present invention is constructed as described above, if the starter shaft 5 is moved to the left in the drawing to the overstroke position, the starter plunger 3 will be moved to the left by the leaf spring 10. At this time, the leaf spring 10 is slightly bent to the right in the drawing, so that the starter plunger 3 is more strongly pressed in the fully closed direction by the leaf spring 10 in its fully closed position.

Also, if the starter shaft 5 is moved to the right in the drawing, the connecting piece 7 will stop the starter plunger 3 from being pulled out at the stopper 3a.
By pressing ' and moving it to the right, the plunger 3 is fully closed, and at this time, the force that tries to close the starter plunger 3 naturally becomes zero.

Therefore, in the case of this embodiment as well, the change in the plunger closing force with respect to the starter shaft stroke is as shown by the broken line in FIG. 3, so the starter operating load is significantly reduced.

Further, in this starter operating mechanism, since the connecting piece 7 is fixed to the starter shaft 5, special precision is not required in machining the connecting piece.

Furthermore, since the present starter operating mechanism can be constructed by simply adding the leaf spring 10 to the first conventional mechanism, the number of parts can be reduced and other conventional parts can be used as they are.

Further, when the starter plunger 3 is fully closed, the stopper portion 3a' of the starter plunger 3 is elastically held between the tip of the connecting piece 7 and the tip of the leaf spring 10, so that no looseness occurs.

As described above, the starter operating mechanism according to the present invention not only significantly reduces the starter operating load, but also has relatively rough machining accuracy, requires fewer parts, and is able to use other conventional parts. It has many advantages in reducing manufacturing costs, such as being able to be used as is.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the main part of a conventional starter operating mechanism, Fig. 2 is a sectional view of the main part of another conventional example, Fig. 3 is a graph showing changes in plunger closing force with respect to starter shaft stroke, and Fig. 4 1 is a sectional view of a main part of an embodiment of a starter operating mechanism according to the present invention. 1...Mixing body, 2...Starter fuel passage, 3...Starter plunger,
5... Starter shaft, 6... Locking piece, 7... Connection piece, 10... Leaf spring.

Claims (1)

[Scope of utility model registration request] In the starter operating mechanism of a multiple carburetor, a connection that is fixed to the starter shaft that slides between an overstroke position and a fully open position, and whose tip is slidably locked to the end of the starter plunger. one piece, the connecting piece is fixed to the connecting piece, and the tip thereof is disposed in a position where it comes into contact with the removal stopper at the end of the starter plunger, and when the starter shaft is slid to the fully closed position, the starter plunger is fixed to the connecting piece. a leaf spring that pushes the plunger to a fully closed position, and when the starter shaft is moved to the overstroke position in the fully closed direction, the starter plunger in the fully closed position is fully closed by the leaf spring. When the starter shaft is moved in the fully open direction, the tip of the connecting piece abuts the starter plunger's removal stop, and the starter plunger is moved in the fully open direction. A starter operation mechanism characterized by: