JP2000097055A - Connection synchronizing device in multiple throttle body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a center pitch of adjacent throttle bodies by disposing a nut threaded to other side of a driving drum and to other end of a throttle value stem in a concave portion having a bottom provided on the other side surface of the driving drum in a multiple throttle bodies in which a plurality of single throttle bodies are laterally disposed. SOLUTION: In a device in which one side end T1a of a throttle body T1 and the other side end T2b of a throttle body T2 are disposed opposed to each other, respective throttle valve stems 2A, 2C are coaxially disposed at a slight space S at opposed ends. A driving drum 9 is disposed on an engaging step portion 2D of the throttle valve stem 2C. The driving drum 9 is tightened using a nut N disposed in a concave portion 9H having a bottom on the dege surface thereof. A bent portion 7A of a driven lever 7 and a bent portion 9C of a driving lever 9 are disposed opposed to each other and both levers 7, 9 are interlocked by penetrating a screw member 10 screwed into a female screw 7B of the bent portion 7A through a screw-inserting groove 9D of the driven lever 7 and tightening the screw member 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel injection device for supplying fuel pressurized by a fuel pump to an engine via a fuel injection valve. In a multiple throttle body in which a plurality of single throttle bodies controlled to be opened and closed by a throttle valve attached to a throttle valve shaft traversing an intake path are arranged side by side,
The present invention relates to a connection tuning device for connecting each throttle valve shaft and tuning a throttle valve attached to each throttle valve shaft.

[0002]

2. Description of the Related Art FIG. 2 shows a first example of a connection tuning device in a conventional multiple throttle body. The one-side throttle body T1 is provided with a one-side intake passage 1A penetrating therethrough, and the one-side intake passage 1A is rotatably supported across the one-side intake passage 1A. Opening / closing is controlled by a first throttle valve 3A attached to the shaft 2A. One side throttle valve shaft 2A
Extends from one end T1a of one throttle body T1 toward the other side (to the right in FIG. 2), and the driven lever 4 is screwed and fixed by a nut N with a locking step 2B. You. That is, the driven lever 4 is fixedly arranged at one end of the one-side throttle valve shaft 2A. Throttle body T2 on the other side
The other side intake passage 1B penetrates the inside, and this other side intake passage 1B is attached to the other side throttle valve shaft 2C rotatably supported across the other side intake passage 1B. Second throttle valve 3
Opening / closing is controlled by B. The other throttle valve shaft 2C protrudes from the other end T2b of the other throttle body T2 toward one side (left side in FIG. 2), and the driving drum 5 is connected to the locking step 2D by a nut N. It is fixed by screwing. That is,
The driving drum 5 is fixed to the other end of the other-side throttle valve shaft 2C.
The driving drum 5 has a thick-walled shape, and an outer periphery thereof is formed with an end insertion hole 5A for inserting and disposing a cylindrical end member fixedly disposed at the end of the accelerator wire, and a wire guide groove 5B connected to the end insertion hole 5A. You. The reason why the driving drum 5 is made thick is that it is necessary to provide the end insertion hole 5A and the wire guide groove 5B. The longitudinal axes of the one-side throttle valve shaft 2A and the other-side throttle valve shaft 2C are arranged on the same line, and the right end surface of the one-side throttle valve shaft 2A and the left end surface of the other-side throttle valve shaft 2C Are arranged facing each other with a small gap. FIG. 3 shows a second conventional example. The configuration of the driving drum is different from that of the first conventional example shown in FIG. Only the differences will be described. The driving drum 6 includes a plate member 6A and a drum member 6B, and the plate member 6A
Has a simple plate shape, and a metal plate material is formed by press punching. The drum member 6B is formed in a thick ring shape by using, for example, a synthetic resin material, an aluminum material, or the like, and has an end insertion hole 6C and a wire guide groove 6D connected to the end insertion hole 6C as in the first conventional example. You. The drum member 6B is welded to the plate member 6A,
It is firmly connected by a connecting means such as a caulking connection, an adhesive connection, and a screw connection. And such a driving drum 6
Is screwed and fixed via a nut N onto a locking step 2D of the other throttle valve shaft 2C.

In the first and second prior art examples, an end member fixedly arranged at the end of the accelerator wire is inserted and arranged in end insertion holes 5A, 6C of the driving drums 5, 6, and the accelerator wire is connected. The guide is arranged in the wire guide grooves 5B and 6D. When the driver operates the accelerator wire, the operating force is transmitted to the driving drums 5 and 6 via the end members, and the driving drums 5 and 6 rotate according to the operation of the accelerator wire. According to the rotation of the driving drums 5 and 6, the other-side throttle valve shaft 2C is
The second throttle valve 3B rotates in synchronization with the driving drums 5 and 6, and opens and closes the other intake passage 1B of the other throttle body T2. On the other hand, the rotation of the driven drums 5 and 6 is transmitted to the driven lever 4 via a connection tuning device (not shown) disposed between the driven drums 5 and 6 and the driven lever 4, and the driven lever 4 , 6 and synchronously. According to the rotation of the driven lever 4, the one-side throttle valve shaft 2A rotates synchronously with the driven lever 4, and the first throttle valve 3A opens and closes the one-side intake passage 1A of the one-side throttle body T1. According to the above,
By driving the driving drums 5, 6, the first throttle valve 3A and the second throttle valve 3B can be synchronously opened and closed.

[0004]

According to the first conventional example, the center pitch P1 between the throttle body T1 on one side and the throttle body T2 on the other side cannot be made sufficiently small, so that various types of engines can be used. It is difficult to increase the degree of freedom of mounting on a vehicle. This is because the driving drum 5 has a thickness of A and the nut N including the washer is disposed on the other side surface 5C of the driving drum 5.

According to the second conventional example, the driving drum 6
By using the thick portion as the plate-shaped member 6A having the thickness B, the center pitch P2 can be reduced corresponding to the difference (A−B) between the thickness A and the thickness B. However, since it is necessary to fix and arrange the drum member 6B to the plate-like member 6A, the number of parts and the number of assembling steps increase, which leads to an increase in manufacturing cost, which is not preferable.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and in a multiple throttle body, the center pitch of each adjacent throttle body can be reduced at a low cost, and the degree of freedom of mounting on various engines is high. An object of the present invention is to provide a connection tuning device in a multiple throttle body.

[0007]

According to the present invention, there is provided a connecting and tuning device for a multiple throttle body according to the present invention.
An intake passage penetrates the inside, and a multiple throttle body in which a plurality of single throttle bodies, which are opened and closed by a throttle valve attached to a throttle valve shaft that crosses the intake passage, is arranged on a side. A driven lever screwed with a nut to one end of a throttle valve shaft protruding toward the other side from one end of the throttle body adjacent to the other, and the other side of the throttle body on the other side From the end, a thick main driving drum which is screwed with a nut to the other end of the other throttle valve shaft protruding toward one side, and a wire guide groove continuous with the end insertion hole is provided on the outer periphery thereof. A coupling tuning device that transmits the rotation of the driven drum to the driven lever and adjusts a relative rotation angle between the driven lever and the driven drum by rotating an adjustment screw screwed to the driven lever, and At the other end of the other throttle valve shaft The Chakusuru nut toward the one side than the other side surface of the main drive drum, characterized in that disposed in a bottomed recess is recessed.

[0008]

According to the present invention, the nut for screwing the driving drum to the other end of the throttle valve shaft on the other side is arranged in the bottomed concave portion recessed from the other side of the driving drum toward one side. The center pitch of the adjacent throttle body can be reduced corresponding to the thickness of the bottomed concave portion. In addition, the drum part with wire end insertion hole and wire guide groove is injection molded,
It can be formed integrally with the driving drum by lathing or the like, and does not increase the manufacturing cost.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a connection tuning apparatus for a multiple throttle body according to the present invention will be described below with reference to FIG. The same components as those of the conventional example are denoted by the same reference numerals, and description thereof will be omitted. Reference numeral 7 denotes a driven lever made of a plate material disposed on a locking step 2B formed at one end of the one-side throttle valve shaft 2A via a collar 20, and an outer peripheral portion of the driven lever 7 is provided on the other side. Is formed, and a female screw 7B is formed in the bent portion 7A. The driven lever 7 is screwed and fixed to the locking step 7B with a nut N via a washer.

Reference numeral 9 denotes a thick-walled driving drum disposed via a collar 21 on a locking step 2D formed on the other end of the other-side throttle valve shaft 2C. An end insertion hole 9A and a wire guide groove 9B similar to those of the first conventional example are formed in the outer peripheral portion, and a bent portion 9C is formed toward one side (left side in the figure). The bent portion 9C corresponds to the bent portion 7A of the driven lever 7. A screw insertion groove 9D that opens toward one side is formed in the bent portion 9C. The bent portion 9C having the end insertion hole 9A, the wire guide groove 9B and the screw insertion groove 9D is formed integrally with the driving drum 9, and is formed by injection molding, forging, cutting, or the like of synthetic resin, aluminum, or the like. Formed by Then, a bottomed recess 9H having a bottom 9G is recessed from the other side surface 9E of the driving drum 9 to the one side surface 9F. In this example, the thickness B of the bottom 9G is determined by the thickness B of the plate member 6A of the second conventional example.
And the same dimensions.

Then, one end T1a of one throttle body T1 and the other end T1 of the other throttle body T2.
2b and the one-side throttle valve shaft 2A
The other throttle valve shaft 2C is arranged concentrically, and the opposite ends of the throttle valve shafts 2A and 2C are arranged with a small gap S as in the conventional example of FIG.

In the above state, the driving drum 9 is disposed on the locking step 2D of the other throttle valve shaft 2C, and the driving drum 9 is connected to the bottom 9G by a nut N disposed via a washer. It is fixed by screwing. On the other hand, in such a state, the bent portion 7A of the driven lever 7 and the bent portion 9C of the driving lever 9 are arranged to face each other.
The screw member 10 screwed into the female screw 7B of the bent portion 7A is inserted into the screw insertion groove 9D of the driving lever 9, and the flange portion 10A of the screw member 10 abuts on the bent portion and is locked. Is done. Reference numeral 11 denotes a lot nut for fixing the position of the screw member 10 after the screw member 10 is screwed and adjusted.
Is a spring stretched between the bent portions 9C and 7A.
Therefore, the connection tuning device R is constituted by the bent portions 9C and 7A, the spring 12, and the screw member 10.

Here, when the driver operates the accelerator,
The accelerator wire is displaced, and this displacement corresponds to the end insertion hole 9.
A is transmitted to the driving drum 9 via A, and the driving drum 9 rotates according to an accelerator operation. That is, the driving drum 9
Is transmitted to the bent portion 7A of the driven lever 7 via the bent portion 9C and the spring 12, and imparts rotation to the driven lever 7 in the valve opening direction. The rotation of the driving drum 9 in the valve closing direction is controlled by the bent portion 9C and the flange 10 of the screw member 10.
A, the screw member 10, and the bent portion 7A of the driven lever 7 transmit the rotation to the driven lever 7 in the valve closing direction. Thus, the second throttle valve 3B of the other throttle body T2,
The first throttle valve 3A of one throttle body T1 is synchronously linked.

On the other hand, when the screw member 10 is rotated, the relative rotation angle between the driven lever 7 and the driven drum 9 can be changed, whereby the second throttle valve 3B
And the first throttle valve 3A can synchronize the throttle valve opening.

Here, in the present invention, the center pitch P of each of the adjacent throttle bodies T1, T2 can be effectively reduced. That is, the driving drum 9 is connected to the other throttle valve shaft 2.
This is because the nut N to be fixed on the locking step 2D of C is disposed on the bottom 9G of the bottomed recess 9H provided on the other side surface 9E of the driving drum 9. 4, the bottom portion 9G having the thickness B is provided on the locking step portion 2D.
Is arranged, and a nut N is screwed on the bottom 9G. According to the above description, the center pitch P3 between the throttle bodies T1 and T2 in the present invention is at least the second.
The center pitch can be reduced to the same center pitch P2 as that of the conventional example, and the center pitch can be reduced corresponding to the difference of (AB) as compared with the first conventional example. Further, as described above, according to the provision of the bottomed concave portion 9H having the bottom portion 9G in the driving drum 9, the end insertion groove 9A, the wire guide groove 9B, and the bent portion 9C are simultaneously integrated when the driving drum 9 is formed. Thus, it is possible to suppress the increase in the manufacturing cost of the driving drum 9 without increasing the number of parts and the number of assembling steps.

[0016]

As described above, according to the connecting / tuning device in the multiple throttle body according to the present invention, the nut for screwing the driving drum to the other end of the other throttle valve shaft is provided on one side of the other side of the driving drum. Since it is arranged in the bottomed recessed portion that is recessed toward the side, the center pitch between both adjacent throttle bodies can be reduced corresponding to the thickness B of the bottom of the bottomed recessed portion. Further, the end insertion groove and the wire guide groove bending portion are integrally formed in the driving drum as in the first example of the prior art, so that it is possible to suppress an increase in the manufacturing cost of the driving drum. It becomes. Furthermore, since the nut on the driving drum side is accommodated in the recess with the bottom, the nut is not visible from the outside, and the appearance can be neatly organized, which is particularly preferable as a multiple throttle body for a motorcycle.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a main part of an embodiment of a connection tuning device in a multiple throttle body according to the present invention.

FIG. 2 is a longitudinal sectional view of a main part showing a first example of a conventional multiple throttle body.

FIG. 3 is a longitudinal sectional view of a main part showing a second example of a conventional multiple throttle body.

FIG. 4 is a longitudinal sectional view of a main part of a multiple throttle body according to the present invention.

[Explanation of symbols]

 T1, T2 Multiple throttle body 7 Follower lever N Nut 9 Driving drum 9E Other side of driving drum 9F One side of driving drum 9H Concave bottom

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[Procedure amendment]

[Submission date] November 16, 1998 (1998.11.
16)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG. 2

FIG.

FIG. 3

FIG. 4

Claims (1)

[Claims] An intake passage 1 penetrates the inside, and a single throttle body T whose opening and closing is controlled by a throttle valve 3 attached to a throttle valve shaft 2 traversing the intake passage 1 has a side. A plurality of throttle bodies disposed on one side and one end of a one-side throttle valve shaft 2A protruding toward the other side from one side end T1a of one side of the throttle body T1 adjacent to one side are screwed with a nut N. And the other end of the other throttle valve shaft 2C protruding toward one side from the other end T2b of the other throttle body T2 and the other end of the throttle body T2 with a nut N, and end-inserted into the outer periphery thereof. A thick driving drum 9 having a wire guide groove 9B continuous with the hole 9A is transmitted. The rotation of the driving drum 9 is transmitted to the driven lever 7, and the screw member 10 screwed to the driven lever 7 is rotated. As a result, the driven lever 7 and the driven drum 9 And a nut N for screwing the driving drum to the other end of the other throttle valve shaft 2C from the other side 9E of the driving drum 9 toward one side 9F. A coupling tuning device for a multiple throttle body, wherein the coupling tuning device is disposed in a recessed bottomed recess 9H.