JPH0660655B2 - Mounting structure for cables in mobile units - Google Patents

Description

Detailed Description of the Invention A. OBJECT OF THE INVENTION (1) Field of Industrial Application This invention relates to a cable mounting structure in a moving body that is moved by pulling / pulling back cables, and is particularly applied to a throttle valve structure in a piston valve type carburetor. And a preferred cable mounting structure.

(2) Related Art A typical example of an actuating member that is moved by pulling / pulling back a cable is a carburetor having a sliding throttle valve used as a fuel supply device for an internal combustion engine in a motorcycle.

FIG. 13 shows the general structure of the throttle valve portion of this carburetor. In the figure, a is a throttle valve, which is slidably guided by a guide tube b formed in the carburetor body. Open and close the intake passage c. Reference numeral d denotes a return spring, which is interposed between a cap e screwed on the upper portion of the guide cylinder b and a throttle valve a, and urges the throttle valve a downward, that is, in the return direction. f
Is a needle valve mounted at the center of the throttle valve a.

Further, g is an operation cable for pulling up the throttle valve a upward, a so-called throttle cable, and a slit h for mounting the cable g is provided vertically on the side surface of the throttle valve a. That is, after the cable g is mounted in the slit h, the end portion i at the end of the cable g is engaged with the lower bottom portion of the throttle valve a. Therefore, due to this structure, the end portion i of the cable g is the throttle valve a. It is eccentric from the center of.

Furthermore, in the work of mounting the cable g, it is necessary to remove the cap e and the return spring d that have been assembled in advance, which is troublesome.

Therefore, the applicant of the present invention first mentioned that the actual exploitation of Sho 61-58.
No. 665 proposed a new configuration.

However, even in the prior art, although the eccentricity has been solved, there still remains a troublesome problem with respect to the time and effort for mounting the cable.

(3) Problems to be Solved by the Invention The present invention has been made in view of the above-mentioned actual circumstances, and while paying attention to the eccentricity of the cable, eliminates the trouble of installing the cable, thereby improving the work efficiency. It is an object of the present invention to provide a mounting structure for flexible cables.

B. Configuration of the Invention (1) Means for Solving the Problems According to the present invention, the end portion having a substantially small columnar shape having a diameter larger than the diameter of the cable is attached to the unend of the cable, In the cable mounting structure in the moving body that is moved by pulling and pulling back the cables,
The moving body main body has a cylindrical hollow portion therein, and the cylindrical hollow portion of the moving body main body comprises a. A cylinder having a base portion fitted in the cylindrical hollow portion, a first inclined surface that slides in the outer diameter direction on the upper surface is formed on the upper surface, and has a substantially semi-cylindrical cross section with a cutting surface in the axial direction. A body having a cylindrical upper part for receiving the cable of the cables and having a width not enough to receive the end part, and having a groove formed therein, and the end part through the step part following the cable groove. The 1st that the accommodation room is formed
A member, b. A guide member that is incorporated in the first member and that corresponds to the cut surface of the first member and that has a second inclined surface that slides down in the inner diameter direction on the upper surface at a position lower than the first radial inclined surface is provided. A second member, c. And a cylindrical third member fitted to the upper cylindrical portion of the first member.

(2) Action Prior to mounting the cable, the first member and the second member are engagedly assembled in the inside of the moving body, and the third member is loosely fitted on the first member. There is.

In this state, the cable is inserted into the main body of the moving body with its end portion first. The end portion of the cable first slides down by tilting its posture in the outer diameter direction by the inclined surface of the first member, and then slides down in the inner diameter direction by the inclined surface of the second member. And the second member holds the closed space.

After that, by pulling the cable in the pull-back direction, the third member fits into the outer periphery of the first member, and as a result, a closed space is substantially formed, and the withdrawal of the end portion of the cable is prevented.

(3) Example An example of a cable mounting structure according to the present invention will be described with reference to the drawings.

1 to 7 show the application to a carburetor equipped with a cable-operated sliding throttle valve as one embodiment. That is, FIG. 1 is an overall sectional view showing the internal structure of the vaporizer,
2 to 7 show the partial structure thereof, particularly the structure of the throttle valve.

Referring to FIG. 1, in the carburetor C, an intake passage 2 penetrating in a horizontal direction is formed in a carburetor body 1, and an upper portion of the carburetor body 1 is orthogonal to the intake passage 2. A throttle valve guide cylinder 3 having a sliding guide hole 3a therein is formed in a protruding shape, and a cap 4 is screwed onto the upper portion of the throttle valve guide cylinder 3.

A float container 6 forming a float chamber 5 is installed below the vaporizer body 1 and the vaporizer body 1
A cylindrical portion 7 corresponding to the float chamber 6 is provided so as to open to the intake passage 2 and to communicate with the inside of the float chamber 5, and a columnar portion 7 is provided so as to project. Mainly inside the holes 7a and 7b. A fuel nozzle 8A, a main fuel jet 8B, and a low speed fuel jet 8C are assembled. In addition to this, necessary members such as a float valve including a float 9 are installed in the float chamber 5, but illustrations other than the float 9 are omitted.

The throttle valve guide cylinder 3 is actuated by pulling up the throttle cable 11 having the end portion 10 at the end, is urged downward by the return spring 12, and the needle valve 13 is hung from the lower end surface thereof. A throttle valve 14 is installed in the intake passage 2 so that it can freely move in and out. The needle valve 13 is inserted into the main fuel nozzle 8A with its center aligned.

The throttle valve 14 moves up and down to change the opening area of the intake passage 2 and adjust the opening of the needle valve 13 accordingly.
Adjust the fuel discharge rate. The throttle cable 11
The other end of is linked to the throttle grip. Reference numeral 58 is a rubber cover.

The throttle cable 11 has both flexibility and rigidity,
The end portion 10 fixed to the end has a cylindrical shape having a larger diameter than the cable 11 and has a large rigidity. The lower end surface of the end portion 10 is chamfered at the edge to facilitate smooth mounting. Although not shown in FIG. 1, a guide groove 3b is vertically provided in the inner surface 3a of the throttle valve guide cylinder 3 in a vertical direction so as to receive a throttle guide described later (see FIG. 8).

2 to 4 show the throttle valve 14 taken out. The throttle cable 11 and the end portion 10 are not shown in the figure.

As shown in the drawing, the throttle valve 14 includes a bottomed cylindrical throttle valve body 15 and a first member 16, a second member 17 and a third member 18 mounted in the throttle valve body 15. The cable holder 19 is included as a main component.

The throttle valve main body 15 has a right cylindrical shape and has a solid support portion 21 at a lower portion thereof. The support portion 21 has a circular hole 22 formed in the center thereof and two arc-shaped portions near the outer periphery. Engagement groove 2
3 are provided so as to face each other, and the needle valve 13 is provided in the circular hole 22.
Is inserted and arranged, and the engaging leg of the first member of the cable holder 19 described later fits into the engaging groove 23. The needle valve 13 has a groove 13a formed on the outer periphery of its head.
A U-shaped clip 24 is attached so as to fit into 3a. A vertical groove 25 having a constant width is formed in the cylindrical portion above the throttle valve body 15.

The outer surface 15a of the throttle valve body 15 is brought into sliding contact with the sliding guide hole 3a of the throttle valve guide cylinder 3 of the carburetor body 1, and is vertically moved without wobbling in the axial direction. 15b is a throttle valve body 1
5 is an idle screw contact surface that is formed obliquely on the outer surface of the solid part 21 of FIG. Reference numeral 15c is a cutaway formed obliquely on the lower surface of the throttle valve body 15 toward the upstream side of the intake passage 2 (see FIG. 1).

The cable holder 19 includes a first member 16, a so-called cable stopper, a second member 17, a so-called spring seat member, and a third member 1.
8 A so-called withdrawal prevention cylinder, which is integrally assembled and fixedly mounted in the upper hollow cylinder portion of the throttle valve body 15.

FIG. 5 shows the cable holder 19 in an exploded manner. 6 and 7 show the respective members.

As shown in FIGS. 5 and 6, the first member, that is, the cable stopper 16, includes an upper small cylindrical portion 27, a lower large cylindrical portion 28, and a lower end flange portion 29. The cylindrical portion 28 is cut with a surface 30 that is eccentric and parallel to the central axis of the cylinder, and the flange portion 29 forms an annular body. Reference numeral 31 is a tapered surface that changes the outer diameter from the small cylindrical portion 27 to the large cylindrical portion 28, and is used for the convenience of mounting the return spring 12. Reference numeral 32 denotes an engagement leg vertically provided from a lower end surface of the flange portion 29, which includes a vertical portion 32a and the vertical portion 32a.
And a horizontal portion 32b that extends horizontally with a curvature from the lower end.

In the small cylindrical portion 27, a U-shaped cable groove 33 that is opened toward the cut surface 30 along the central axis is formed so as to penetrate vertically in the upper portion of the small cylindrical portion 27. A cylindrical chamber, that is, an end portion accommodating chamber 34 that communicates and opens toward the large-diameter cut surface 30 is formed. Step portion 35 between the cable groove 33 and the end portion accommodation chamber 34
Constitutes an engagement surface of the so-called end portion 10. Further, a groove 36 is circumferentially provided on the outer circumference of the small cylindrical portion 27.

Then, on the upper surface of the small cylindrical portion 27, a first inclined surface 38 that is inclined toward the cut surface 30 is formed. In this embodiment, the inclined surface 38 is the upper surface 27 of the small cylindrical portion 27.
Although a is left a little, it is not limited to this mode, and the point is determined by the slope of the inclined surface 38.

In the small cylindrical portion 27, the groove width a of the cable groove 33 is set to a width sufficient to receive the thickness of the cable 11, and the opening width b of the end portion accommodation chamber 34 to the cut surface 30 is set to the end portion 1.
It is slightly larger than the diameter of 0.

In the large cylindrical portion 28, the step portion 4 from the end portion accommodation chamber 34
A larger-diameter clip accommodating chamber 41 is formed through 0.

The flange portion 29 has an annular shape, and its inner hole is continuous with the clip accommodating chamber 41 of the large cylindrical portion 28. The inner hole is the projecting circular portion 21 of the support portion 21 of the throttle valve body 15.
a Insert. The outer diameter of the throttle valve body 15 is a diameter that is fitted and inserted into the inner diameter of the upper cylinder portion of the throttle valve body 15.

Flange portion 2 facing the cut surface 30 of the cylindrical portion 27, 28
A cutout recess 42 is formed on the outer side of 9. An engaging projection of a second member 17, which will be described later, is fitted into the notch recess 42.

The second member, that is, the spring seat member 17, includes the spring seat annular portion 44.
Mainly of the spring seat circular ring portion 44, and a guide member 45 rising upward toward the inner diameter from the spring seat circular ring portion 44, and further, the spring seat circular ring portion 4
4, a throttle guide 46 protruding in the outer diameter direction and an engaging projection 47 engaging with the cable stopper 16 are integrally formed. The spring seat member 17 is molded of hard synthetic resin.

More specifically, the upper surface 44a of the spring seat ring portion 44 forms a spring seat surface on which the return spring 12 is seated, the inner diameter surface of which is fitted to the outer side of the large cylindrical portion 28 of the cable stopper 16, and the outer diameter surface of which is the outer diameter surface. It is fitted and inserted into the throttle valve body 15.

The guide member 45 is arranged so as to face the opening of the cable stopper 16 at a fixed position where the spring seat member 17 is assembled. That is, the guide member 45 has a predetermined thickness,
The top surface has the width and the cut surface 3 of the cable stopper 16
A second inclined surface 49 that is inclined toward 0 is formed. The inclined surface 49 has a flat surface in the illustrated example, but may be formed as a concave surface. In this way, the guide member 45 is attached to the spring seat annular portion 4
4 protrudes toward the center, but a lower end thereof forms a collar portion 50. The collar 50 is fixed at the fixed position and the cable stopper 1
It is flush with the stepped portion 40 of 6 and serves as a holding surface for the clip 23.

The throttle guide 46 has a width that can be inserted into the vertical groove 25 of the throttle valve main body 15 and further in the outer diameter direction.
Of the throttle valve guide cylinder 3 is fitted into the above-mentioned guide groove 3b.

The engagement protrusion 47 is the flange portion 29 of the cable stopper 16.
It is elastically and tightly fitted into the notch recess 42 formed in the. The engaging projection 47 has a function of determining a fixed position where the cable stopper 16 and the spring seat member 17 are assembled, and in this embodiment, the engaging projection 47 is integrated with the throttle guide 46 at the same position in the circumferential direction. However, the positions may be different from each other. In that case, it goes without saying that the engagement protrusion 47 corresponds to the notch recess 42.

The third member, that is, the extraction preventing cylinder 18, has an inner diameter equal to the outer diameter of the small cylindrical portion 27 of the cable stopper 16 and an outer diameter equal to the outer diameter of the large cylindrical portion 28 of the cable stopper 16. Further, on the inner surface, a projection 52 is provided in the circumferential direction so as to be fitted into the groove 36 of the cable stopper 16 with a plastic fit. The ridges 52 may be continuous or discontinuous.

The throttle valve 14 including the above members is assembled in the throttle valve guide cylinder 3 of the carburetor C in the state shown in FIG. 8 (temporary assembled state).

In this state, the throttle cable 11 is not attached at the end.

In the figure, the return spring 12 is fitted between the inner surface of the throttle valve body 15 and the outer surface of the cable holder 19, and
The lower end is seated on the spring seat surface 47a of the spring seat member 17, and the cap 4 has a central hole 5 in the center which is large enough to pass the end portion 10 of the throttle cable 11.
5 has been opened. Further, although the cap 4 is a screw type in the present embodiment, it may be a fitting type.
The upper end thereof is in contact with an annular groove 56 formed on the inner surface of the cap 4. Needless to say, the return spring 12 has a function of pushing down the throttle valve 14 by its urging force, but also has a function of preventing the first member 16 and the second member 17 from coming off. Reference numeral 57 denotes a sealing material, which is interposed on the mating surface between the guide cylinder 3 and the cap 4 to maintain liquid tightness.

Hereinafter, one mode of the assembling procedure centering on the throttle valve 14 in the carburetor C of the present embodiment will be described.

That is, in the manufacturing and assembling process of the carburetor, the needle valve 13 is attached to the valve body 15 of the sliding throttle valve 14, and then
The first member, that is, the cable stopper 16 is assembled to the valve body 15. That is, when the engaging leg 32 of the cable stopper 16 is inserted into the engaging groove 23 of the valve body 15 and the cable stopper 16 stops on the upper surface of the solid portion 21 of the valve body 15, the cable stopper 16 is stopped at the stop position. Rotate until. After that, the second member, that is, the spring seat member 17 is attached to the throttle guide 46 of the throttle valve body 15 in the longitudinal groove 25.
Is inserted as a guide, and the engaging projection 47 is fitted into the notch recess 42 of the cable stopper 16. As a result, the valve body 15, the first member 16 and the second member 17
Rotation between persons is prevented and positioned. At the same time, the clip 23 is held. Next, the third member, that is, the pull-out preventing cylinder 18 is lightly fitted on the upper portion of the cable stopper 16.

The throttle valve 14 is incorporated in the throttle valve guide cylinder 3 of the carburetor C. At this time, the throttle guide 46 of the spring seat member 17
Is engaged with a guide groove 3b vertically provided on the inner surface 3a of the guide cylinder 3, and the attitude of the throttle valve 14 is maintained and incorporated. Further, since the center of the throttle valve main body 15 is held by the inner surface 3a of the guide cylinder 3, the needle valve 13 fixed at the center is held.
Are accurately loaded into the main fuel nozzle 8A.

Then, the lower end of the return spring 12 is seated on the spring seat surface 44a of the spring seat member 17, and the upper end of the return spring 12 is fitted into the annular groove 56 of the cap 4 so that the cap 4 is guided.
Screw into.

In this way, the temporary assembly in the manufacturing process of the carburetor C is completed.

The carburetor C is assembled to the motorcycle body, and then the throttle cable is attached according to the following procedure.

9 to 12 show this operation procedure.

After attaching the cover 58 to the throttle cable 11,
The end portion 10 of the cable 11 is exposed from the inlet portion of the cap 4 to the holder 19 through the central hole 55. The tip of the end portion 10 is in contact with the first inclined surface 38 (see FIG. 9).

When the cable 11 is further pushed in, the end portion 10 is guided in the first inclined surface 38 in the outer diameter direction and slides down, and reaches the second inclined surface 49 through the void space (see FIG. 10).

Then, the end portion 10 is guided along the second inclined surface 49 in the inner diameter direction and slides down to return to the posture and reaches the end portion accommodation space 34. At this point, the cable 11 is received in the cable groove 33 (see FIG. 11).

In this state, the cable 11 is fully pulled up.
As a guide, the length is equivalent to the stroke. First, the upper end of the withdrawal prevention cylinder 18 abuts the inner surface of the cap 4, and the holder 19 is further pulled up to fit the withdrawal prevention cylinder 18 into the small cylindrical portion 27 of the cable stopper 16. The groove 36 is fitted. At the same time, the upper end of the throttle valve body 15 also contacts the inner surface of the cap 4, and the pulling up of the cable 11 is stopped (see FIG. 12).

As a result, the pull-out prevention cylinder 18 becomes the cable stopper 16
The space facing the cable groove 33 at the upper portion of the cable stopper 16 is reduced, and the end portion 10 is not detached.

Thus, according to this embodiment, the throttle cable 1
No need to remove the cap 4 of the carburetor C and to take out the return spring 12 and the throttle valve 14 when mounting the cable 1, and the cable 11 can be mounted in the assembled state. Therefore, the throttle valve 14 of the carburetor C can be mounted. The work of attaching the cable 11 to the cable becomes efficient. Furthermore, the invasion of foreign matter due to the removal of the cap 4 is prevented, which contributes to the improvement of the product yield. At the same time, the cable 11 is arranged at the center of the cable holder 19 and by extension the throttle valve 14, and there is no eccentricity.

In the above embodiment, the second inclined surface 4 of the guide member 45
It can be easily inferred that the end portion 10 can be easily and reliably dropped by forming the concave portion 9 in the center.

The present invention is not limited to the above embodiments, and various design changes can be made within the scope of the basic technical idea as long as the essential requirements of the present invention are satisfied. That is, the following aspects are included in the technical scope of the present invention.

Although the throttle valve main body 15 has the bottomed support portion 21 in the embodiment, the support portion 21 may be omitted and the lower portion of the first member 16 may be used as the bottom portion. In this case, the hollow throttle valve body 1
5 and the first member 16 have an engaging relationship so as to be held in a predetermined posture.

The cutout recess 46 of the first member 16 may be provided on another side surface. In that case, it goes without saying that the engagement protrusion 47 of the second member 17 is formed at a position corresponding to the engagement protrusion 47.

C. Advantageous Effects of Invention According to the present invention, in mounting a cable on a moving body,
The mounting work can be performed without removing the moving body from the housing body that houses the moving body, and the work is easy, and the working efficiency can be significantly improved. Also,
The cable is accurately and robustly mounted inside the mobile body, providing a reliable mounting structure.

[Brief description of drawings]

The drawings show an embodiment of a mounting structure for cables of the present invention,
1 is an overall sectional view showing the application of the embodiment to a carburetor having a sliding throttle valve, FIG. 2 (a) is an enlarged sectional view showing the throttle valve in FIG. 1, and FIG. Is a cross-sectional view taken along the line AA of (a), (c) is a cross-sectional view taken along the line BB of (a), and FIG.
FIG. 4 (a) is a plan view, FIG. 4 is a sectional view taken along line IV-IV of FIG. 2 (a),
Fig. 5 is an exploded view of the cable holder, Fig. 6 (a) is a plan view of the first member 16 in Fig. 5, and (b) is Fig. 5 VI.
-VI line sectional view, FIG. 7 is a plan view of the second member 17 in FIG. 5, FIG. 8 is a temporary assembly state diagram of the throttle valve, and FIGS. 9 to 12 are diagrams showing a cable mounting procedure. is there. FIG. 13 shows the structure of a conventional sliding throttle valve. 10 ... End part, 11 ... Cable (throttle cable), 14 ... Moving body (throttle valve), 15 ... Moving body (throttle valve body), 16 ... First member, 17 ... Second member , 18 ... Third member, 30 ... Cut surface, 33 ... Cable groove, 34 ... End portion accommodation chamber, 35 ... Step portion, 38
...... First inclined surface, 49 ...... Second inclined surface

Claims (1)

[Claims] 1. A cable in a moving body in which an end portion of a substantially cylindrical shape having a diameter larger than that of the cable is attached to an end of the cable, and a moving operation is performed by pulling / pulling back the cable. In a mounting structure of the same type, the moving body main body has a cylindrical hollow portion therein, and the cylindrical hollow portion of the moving body main body comprises a. A first slanted surface that slides in the outer diameter direction is formed on the upper surface of the base portion that is fitted in the cylindrical hollow portion, and has a substantially semi-cylindrical cross section with a cutting surface cut along the axial direction. Has a cylindrical body, the cylindrical upper portion of which receives a cable of the cables, and is provided with a cable groove having a width that does not receive an end portion, and a step portion is formed following the cable groove. A first member having an end portion accommodation chamber formed therethrough; b. A guide member that is incorporated in the first member, faces the cutting surface of the first member, and has a second inclined surface that slides down in the inner diameter direction on the upper surface at a position lower than the first diameter inclined surface. A second member, c. A cylindrical third member fitted to the upper cylindrical portion of the first member, and a mounting structure for cables and the like.