JPS58174149A - Connecting device of compound carburetor - Google Patents

Abstract

PURPOSE:To decrease members for use while form a carburetor in common construction and obtain light weight or the like, by integrally forming plural sets of connection bosses butted with point ends mutually in oppositely facing sides of the neighboring carburetors and securing these connection bosses to each other with screw members. CONSTITUTION:The first and second carburetors C1, C2 are arranged in such a manner that their intake path center lines O1, O2 are mutually twisted at a prescribed angle with an optional straight line crossing at a right angle with said both center lines as a twisted center line A. Two sets of connection bosses 51, 52 mutually butted with point ends are protrusively provided to oppositely facing sides of both carburetor main units 11, 12. Here the two sets of the bosses 51, 52 are arranged in a symmetrical relation as viewed from the direction of the line A with respect to an angle theta formed by the lines O1, O2, that is, a bisector B of the angle theta. Screw members 10 of machine screws, bolts, etc. inserted into through holes 8 of said boss 51 are screwed and tightened to a screw hole 9 of the boss 52 to mutually secure each set of the bosses 51, 52.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connecting device for integrally connecting at least one pair of adjacent carburetors in a multiple carburetor of the type arranged in such a manner that the two carburetors are connected together.

Conventionally, a common multiple carburetor connection device bridges the carburetors with a highly rigid connection plate in order to increase the connection rigidity between the carburetors, and each carburetor and the connection plate are fixed at multiple locations with screw members. are doing. When such a connecting device is applied to the above-mentioned type of multiple carburetor, it is necessary to use a connecting plate that has a complicated shape and is heavy, resulting in an increase in cost and weight of the multiple carburetor.

Therefore, the present invention integrally molds a plurality of sets of connecting bosses whose tips abut each other on opposing surfaces of adjacent carburetors, and presses these connecting bosses to fix each other with screw members, thereby eliminating the need for conventional connecting members. It is an object of the present invention to provide a connecting device for multiple carburetors of the aforementioned type that is lightweight, has high connection rigidity, and is inexpensive, by reducing the number of screw members used and standardizing the structure of each carburetor. do.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In FIG. 1, E is a V-type internal combustion engine mounted on a motorcycle, and has a front cylinder Ef and a rear cylinder E arranged in a V-shape. However, a multiple carburetor C is arranged in a V-shaped space between them.

The multiple carburetor C is a first carburetor C attached to the bowl cylinder E.
1, and a second carburetor C2 mounted on the a section cylinder ELF. They are arranged in the following relationship in relation to the V-shaped arrangement of E.

That is, as shown in FIGS. 2 to 4, the first and second
The carburetor C1s'l has their intake tract center line 01*01
are arranged so as to be twisted at a predetermined angle with respect to each other, with an arbitrary straight line orthogonal to the rain center line as the twist center line A.

The first and second carburetors C1eC each have an intake path of 2s.
=2t carburetor body 1. ．． 1. , float chamber body L- connected to the lower surface of these carburetor bodies 11, 12
3* and 1 both carburetor bodies 11.1. A pair of positioning bosses 4 whose tips abut each other are provided on opposite sides of the
1-41 and 2 sets of connected noodle shooting bosses 5. ,5. ;5. ,5
□ is provided protrudingly. At that time, the positioning boss 4s-4* is
The center of the defined airway when viewed from the direction of the torsion center line A
It is arranged on the bisector B of the angle formed by I sot, that is, the torsion angle θ, and two sets of connecting bosses 5. ．． 5°55ts51 is arranged symmetrically with respect to the bisector B. These bosses are integrally molded onto the corresponding carburetor body.

Positioning boss 4. -4* positioning holes 61.
6t are provided, and one knock bottle T is fitted into these holes K. On the other hand, the connection boss 5 of the first carburetor C1. There are through holes 8, 8 in the connecting boss 51 of the second carburetor C, and the connecting boss 5 of the first carburetor C1. and connection boss 5 of second carburetor C8. are provided with screw holes 9, 9 that communicate with the through holes 8, 8, respectively, and a screw inserted into each through hole 8,
By screwing and tightening the screw member 10 such as a bolt into the screw hole 9, each set of connection bosses S, -5t; 5s -5m
are fixed to each other. Thus, the first and second carburetors C1eC with the first and second gases 4 and the connecting bosses 5s=5
The structure of * will be standardized.

Carburetor body C, t *C111C is the intake path 2t-
Throttle valve within 2s 11. ．． 11. Valve shaft 121,1 supporting
2. are rotatably supported, respectively, and an opening/closing pulley 15 to which a valve opening wire 13 and a valve closing wire 14 are connected is fixed to the outer end of the valve shaft 12m of the first carburetor C8.

Both wires 13 and 14 are pulled alternately by rotation of a throttle grip (not shown) of the motorcycle.

Valve shafts 121, 12 of both party converters C1mC2. is interlocking device 1
6. This interlocking device 16 includes a third lever 17* fixed to the inner end of the valve shaft 121 of the first carburetor C1.
, second and third levers 17*-17g each rotatably supported on the outer periphery of the positioning boss 4ty4t via synthetic resin collars 18□, 1B, and a valve shaft 12219 of the second carburetor C1. , the first link 2 connected via
0. and the third and fourth levers 17. ．． 17. Bin joint between 19. , 194, the second link 2 is connected via
02, and the second and third levers 17. ．． 17. a second lever 171;
The first link 20□ and the second lever 17t constitute a parallel link mechanism, and the third lever IT.

Second link 20. and fourth lever 17. constitutes a reversing linkage.

As shown in FIG. 5, the tuning device 21 includes a second lever 17. The U-shaped connecting arm 22 and the third lever 17. and a single-shaped connecting arm 23 formed integrally with the U-shaped connecting arm 22 and inserted into the U-shaped connecting arm 22. The adjusting screw 24 and the spring 25 compressed within the arm 22 sandwich the second and second levers 17x to 17s in the rotating direction.

Further, on the valve shafts '2z and 12t, a valve closing spring 2G made of a torsion coil spring biases the throttle valve 11zr1* in the closing direction.
, 262 are connected to each other.

By adjusting the adjusting screw 24 forward and backward with respect to the single-shaped connecting arm 23, the second and third levers 17. .

17s is adjusted, thereby controlling the throttle valves 111, 11 . of the first and second carburetors c, ect. The opening degree can be synchronized.

Figures 1 to 4 show the throttle valve 11. ．． 11. This shows the state in which the valve is closed to the idle opening degree. From this state, if the valve opening wire 13 is pulled and the opening/closing pulley 15 is rotated in the direction of arrow R in Fig. 3, the valve shaft 12° will rotate with it. first
Directly open the throttle valve 11° of the carburetor C1. Further, the valve shaft 12. The above rotation of the lever 17. -1st link 2
01. Second lever 171, tuning device 21, third lever 1
7. , the second carburetor C1 valve stem 12 through the second link 20 and the fourth lever 174! is transmitted to the throttle valve 11. of the second carburetor C8. will also be released at the same time.

On the contrary, if the valve closing wire 14 is pulled, both throttle valves 1
1. , 11. It is clear from the above action that the two are closed at the same time.

As described above, according to the present invention, a pair of adjacent carburetors are in a twisted relationship with each other with their intake duct center lines twisted around an arbitrary straight line orthogonal to the rain center line. In a multiple carburetor arranged in this way, a plurality of sets of connecting bosses whose tips abut each other are integrally molded on the opposing surfaces of both the carburetors, and a screw member pushed through one boss of each set is connected to the other boss. Since the two carburetors are screwed together, it is possible to connect the two carburetors without using a separate connection plate from the carburetor as in the past, simplifying the connection structure and reducing the overall weight of the multiple carburetor. can be achieved.

In addition, since the connecting bosses are integrally molded with the corresponding carburetors, the rigidity of the roots of each 'boss is particularly high, and as a result, the rigidity of the connection between the two converters can be increased. Since the members are simply fixed between the connecting bosses, one piece is sufficient for each set of bosses, and the number of members used is extremely small compared to conventional ones that use connecting plates, so assembly work can be performed easily. can.

Furthermore, the plurality of sets of connection bosses are connected to each other at an angle formed by the center lines of the intake paths of both the carburetors when viewed from the direction of the torsion center line.
Since they are arranged in a symmetrical relationship with respect to the equal dividing line, it is possible to achieve commonality in the structure of each carburetor.Therefore, it is possible to achieve commonality of the structure of each carburetor, so that two carburetors of the same structure with connecting bosses can be matched by matching their connecting bosses. By combining them, a multiple carburetor can be obtained, and together with the omission of the connecting plate, the multiple carburetor can be provided at a low cost.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a side view of an internal combustion engine equipped with multiple carburetors connected by the coupling device of the present invention, and FIG. 2 is a side view of an internal combustion engine equipped with multiple carburetors connected by the coupling device of the present invention. Front view of the intergas converter, Figure 3 is the same as ■-■ in Figures 2 and 4.
A line sectional view, FIG. 4 is a front view of the multiple carburetor mainly showing the throttle valve interlocking device, and FIG. 5 is a view taken in the direction of arrow V in FIG. 3. A... Torsion center line, B... Bisector line, C... Multiple carburetor, C,, C,... 1st. 2nd vaporizer, 01,0
゜...Intake tract center line, θ...Torsion angle, 5. 5.・
...Connection boss, 8...Through hole, S...Screw (10.
・Screw members. Patent Applicant: Honda Motor Co., Ltd. Procedural Amendment (
Method) 1. Display of the case 1981 Patent Application No. 56334 2 Name of the invention Multiple carburetor coupling device 3, person making the amendment Relationship to the case Patent applicant name (532) Honda Motor Co., Ltd. 4, representative
Administrator 〒104 5, Date of amendment order

Claims (1)

[Claims] In a multiple carburetor, at least one pair of adjacent carburetors are arranged such that their intake duct center lines are in a twisted relationship with each other with an arbitrary straight line orthogonal to the rain center line as the torsion center line. A plurality of sets of connecting bosses whose tips abut each other are integrally molded on the opposing surfaces of the vaporizer, and these plurality of bosses are arranged at an angle equal to the angle formed by the defined airway centerline when viewed from the direction of the torsion centerline. A connecting device for multiple carburetors, which is arranged in a symmetrical relationship with respect to a dividing line, and in which a screw member inserted through one boss of each set is screwed and tightened to the other boss.