JP2617665B2 - Connection structure of throttle cable of carburetor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for connecting a throttle cable of a carburetor for connecting a throttle cable to a throttle valve.

[0002]

2. Description of the Related Art Generally, a throttle valve of a carburetor is
It is operated by a cable connected to the valve (for example, see Japanese Utility Model Publication No. 3-18685). An example of the connecting structure of this cable and the throttle valve is shown in FIG.
Shown in

In FIG. 6, the intake passage 1 shown by a broken line is
As is well known, the inside of the vaporizer body 4 is moved up and down
What I <br/> a cylindrical throttle valve 2 which moves in the axial direction of the body, the opening is adjusted. The lower end of the throttle valve 2 is engaged with the end 3b of the inner cable 3a of the throttle cable 3, and the throttle valve 2 is operated by pulling the throttle cable 3. A jet needle 6 inserted into a needle jet 5 is fixed to the throttle valve 2.
The jet needle 6 is positioned on the throttle valve 2 by an E ring 7 and is fixed by a retainer 8 so as not to come out upward. A throttle spring 10 formed of a compression coil spring is provided between the retainer 8 and the cap 9. Reference numeral 13 is an orifice for adjusting the amount of fuel supplied.

In order to attach the throttle cable 3 to the throttle valve 2, the cap 9 is removed and the throttle valve 2 is taken out.
The end 3b of a is hooked on the throttle valve 2, and then the throttle valve 2 and the like are attached to the carburetor body 4.

[0005]

[Problems to be Solved by the Invention] However, in this way,
From inside the carburetor body 4, small parts 2, 6, 7, 8,
Take out 10, that is, disassemble a part of the vaporizer,
Engaging the end portion 3b of the inner cable 3a and the throttle valve 2 is troublesome in the attachment and detachment work, and the parts such as the E ring 7 and the retainer 8 in the carburetor body 4 are extremely small. Parts may be lost. Therefore, it is not easy to attach and detach the throttle cable.

In view of the above, there has been conventionally proposed a connection structure which facilitates attachment and detachment of a throttle cable (for example, see Japanese Utility Model Publication No. 2-41336). FIG. 7 shows an example of this mounting structure.

In FIG. 7, a throttle valve 2 has
The operating rod 11 is fixed.
Of the carburetor body 4.
The end 3a of the inner cable 3a is attached to the engagement end 11a.
b is engaged outside the carburetor body 4, so that when the throttle cable 3 is attached and detached,
There is no need to disassemble the throttle valve 2 and the like. Therefore, the work of attachment and detachment becomes easy.

However, in this prior art, the U-shaped mounting stay 12 is projected from the carburetor body 4 and the outer 3c of the throttle cable 3 is fixed to the mounting stay 12. Therefore, since the mounting stay 12 needs to be provided, it is inevitable that the entire vaporizer becomes large,
Also, the appearance is unsightly.

That is, the end 3b of the throttle cable 3
When the above is engaged in the carburetor body 4, the mounting and dismounting work becomes troublesome, while when engaged outside the carburetor body 4, the entire carburetor becomes large.
The present invention has been made in view of the above conventional problems,
An object of the present invention is to provide a throttle cable connecting structure that facilitates attachment and detachment work of the throttle cable and does not cause an increase in size of the entire carburetor.

[0010]

In order to achieve the above object, the present invention provides a carburetor body with an operating member for mounting a throttle cable, and by operating this operating member, the throttle valve in the radial direction. An engagement member which moves linearly to engage and disengage an end of the throttle cable is provided inside the throttle valve, and a first member for urging the engagement member in a direction for engaging the end of the throttle cable is provided. A spring is provided inside the throttle valve .

[0011]

According to the present invention, since the engagement member engaging and disengaging from the end of the throttle cable is provided inside the throttle valve , there is no need to provide a mounting stay. By operating the operation member provided on the carburetor body, the end of the throttle cable is disengaged from the engagement member, so that the operation member can be operated from the outside of the carburetor, and therefore, the work of attaching and detaching becomes easy. .

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment. In FIG. 1, a holder 20 is fixed to the bottom of the throttle valve 2 with screws 21. In this holder 20,
The storage hole 22 is formed in the radial direction R of the throttle valve 2 and in a direction perpendicular to the direction in which the intake passage 1 extends in FIG. As shown in FIG. 1, an engagement member 30 that is guided by the storage hole 22 and slides linearly is stored in the storage hole 22.

A throttle valve 2 is provided in the storage hole 22.
Through holes 2a face each other and communicate with each other. The storage hole 22
Is connected to the through hole 4a of the carburetor body 4 via the through hole 2a of the throttle valve 2 at the fully closed position (idling state) of the throttle valve 2 shown in FIG.

In the storage hole 22, the engaging member 30 is slid in the direction of the through hole 4a , that is, as described later.
A compression coil spring (first spring) 23 that constantly presses the end portion 3b of the toll cable 3 in the engaging direction is provided. On the other hand, the through hole 4 of the vaporizer body 4
The distal end portion 44 of the operation member 40 is slidably inserted into a. The operation member 40 is constantly urged outward by the spring force of the return spring 42.
Is projected outside the carburetor body 4, while the operating member 40 is prevented from falling out of the through hole 4 a by the washer 43. The operation member 40 is used for attaching the throttle cable 3 and, as will be described later, by operating the operation member, the engagement member 30 is operated.
Is disengaged from the end 3b of the throttle cable 3.

The holder 20 has a first cable insertion hole 24 formed in an upper portion thereof. The first cable insertion hole 24 is arranged immediately below the cable fixing hole 9a of the cap 9 and has a larger diameter than the end portion 3b of the inner cable 3a. On the other hand, the engaging member 30 includes
A second cable insertion hole 31 adjacent to the first cable insertion hole 24 is formed. The second cable insertion hole 31 is larger in diameter than the end 3b of the inner cable 3a. As shown in FIG. 3, when the operating member 40 is pushed, the engaging member 30 is pushed by the distal end portion 44. The holder 20 comes into contact with the positioning portion 25 of the holder 20, and matches the first cable insertion hole 24. On the other hand, as shown in FIG. 1, the engaging member 30 always sandwiches the inner cable 3 a inserted through the second cable insertion hole 31 between the inner cable 3 a and the first cable insertion hole 24 of the holder 20. And the cable end 3b
Is designed to prevent it from slipping upward. In addition, the diameter of the first cable insertion hole 24 becomes larger as going upward, thereby facilitating insertion of the cable end 3b.

The other structure is the same as that of the conventional example shown in FIG. 6, and the same or corresponding portions are denoted by the same reference characters and detailed description and illustration thereof will be omitted.

Next, a method of mounting the throttle cable 3 shown in FIG. 1 will be described. First, throttle cable 3
Is not attached, the throttle valve 2 is lowered and fully closed (idling state). In this state, the storage hole 22 of the holder 20 faces the through hole 4a of the carburetor body 4. In this state, when the operation unit 41 of the operation member 40 is pushed inward from outside by a finger, the second cable insertion hole 31 of the engagement member 30 Of the cable insertion hole 24 of FIG. Thereafter, the throttle cable 3 shown in FIG. 3 is inserted through the cable insertion holes 24 and 31.
After this insertion, when the hand is released from the operation member 40, the engaging member 30 moves to the right and the cable end 3b engages with the engaging member 30, as shown in FIG. This completes the mounting work. The removing method is the same as the above-mentioned attaching method, and the description thereof is omitted.

As described above, according to this connection structure, the throttle cable 3 can be attached to the throttle valve 2 by operating the operating member 40 provided on the carburetor body 4 from outside the carburetor body 4. It is not necessary to disassemble small parts such as the throttle valve 2. Therefore, it is possible to save the labor of disassembling, there is no fear of losing a small part, and therefore the attaching and detaching work becomes easy.

On the other hand, since the engaging member 30 that engages with the end 3b of the throttle cable 3 is provided inside the throttle valve 2 , the mounting stay projects greatly from the carburetor body 4 unlike the conventional case. Nor. Therefore, the carburetor is not likely to be upsized, and the appearance is improved.

FIG. 5 shows a second embodiment. In this figure, the throttle valve 2 has a storage hole 22 of a holder 20.
A slit 2b is formed at a position facing the slit. The storage hole 22 communicates with the through hole 4a of the carburetor body 4 via the slit 2b. The slotted part 2b
Is provided in parallel with the axial direction S of the throttle valve 2.
4 have invaded. Therefore, in this embodiment, since the operation stroke of the operation member 40 is shortened, the operation portion 41
The amount of protrusion D of is smaller than that in the embodiment of FIG. In addition,
The other configuration of the second embodiment is the same as that of the first embodiment, and the same or corresponding portions are denoted by the same reference numerals and description thereof will be omitted.

In each of the above embodiments, the end 44 of the operating member 40 is inserted through the through hole 4a of the carburetor body 4, and the engaging member 30 is operated from outside the carburetor body 4. However, according to the present invention, it is not always necessary to provide the through-hole 4a in the carburetor body 4;
0 is made of a magnetic material, and the operating member made of a magnet is brought close to the outside of the carburetor body 4 so that the engaging member 30
May be operated.

[0022]

As described above, according to the present invention, the engagement member that engages with and disengages from the end of the throttle cable is switched .
Since the engagement between the engaging member and the end of the throttle cable can be released by operating the carburetor body from outside the carburetor valve , the attachment and detachment of the throttle cable is easy, and the carburetor is provided. There is no fear that the whole will be enlarged, and the appearance will be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a connection structure of a throttle cable of a carburetor according to a first embodiment of the present invention.

FIG. 2 is a plan sectional view of the same.

FIG. 3 is a longitudinal sectional view of a connection structure of a throttle cable of a carburetor, showing a mounting and removing method.

FIG. 4 is a plan sectional view of the same.

FIG. 5 is a vertical cross-sectional view of a throttle cable connecting structure of a carburetor showing a second embodiment.

FIG. 6 is a longitudinal sectional view of a connection structure of a throttle cable of a carburetor showing a conventional example.

FIG. 7 is a longitudinal sectional view of a connection structure of a throttle cable of a carburetor showing another conventional example.

[Explanation of symbols]

2 ... Throttle valve, 3 ... Throttle cable, 3b
... end portions, 4 ... vaporizer body, 30 ... engaging member, 40 ... operating member

Claims (1)

(57) [Claims] 1. A throttle cable is provided in a carburetor body.
In the structure for connecting the throttle cable of the carburetor that connects the cylinder to the cylindrical throttle valve that moves in the axial direction , the carburetor body is provided with an operating member for mounting the throttle cable, and by operating this operating member, the throttle valve An engaging member that moves linearly in the radial direction of the throttle cable to engage and disengage with the end of the throttle cable is provided inside the throttle valve . The first spring that urges the above-mentioned throttle valve
A structure for connecting the throttle cable of a carburetor, which is provided inside the valve .