JP3861174B2 - Coupling tuning device in multiple throttle body - Google Patents

Description

[0001]
[Industrial application fields]
TECHNICAL FIELD The present invention relates to a fuel injection device that injects fuel boosted by a fuel pump to an engine via a fuel injection valve, and in particular, a throttle valve in which an intake passage passes through and the intake passage crosses the intake passage. In a multiple throttle body in which a single throttle body that is controlled to open and close by a throttle valve attached to a shaft is arranged on the side, the throttle valve shafts are connected to each other and attached to each throttle valve shaft. The present invention relates to a connection tuning device for tuning a throttle valve.
[0002]
[Prior art]
A first example of a connection tuning device in a conventional multiple throttle body is shown in FIG. The throttle body T1 on one side is formed with a one-side intake passage 1A penetrating through the inside, and the one-side intake passage 1A is a one-side throttle valve that is rotatably supported across the one-side intake passage 1A. Opening / closing is controlled by the first throttle valve 3A attached to the shaft 2A. The one side throttle valve shaft 2A protrudes from the one side end T1a of the one side throttle body T1 toward the other side (right side in FIG. 2). Screwed and fixed. That is, the driven lever 4 is fixedly arranged at one end of the one-side throttle valve shaft 2A. The other side throttle body T2 is drilled through the other side intake passage 1B, and the other side intake passage 1B is rotatably supported across the other side intake passage 1B. Opening / closing is controlled by the second throttle valve 3B attached to the shaft 2C. The other side throttle valve shaft 2C protrudes from the other side end T2b of the other side throttle body T2 toward the one side (left side in FIG. 2). Screwed and fixed. That is, the main drum 5 is fixed to the other end of the other throttle valve shaft 2C. The main drum 5 has a thick wall, and an end insertion hole 5A for inserting and arranging 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 are formed on the outer periphery of the main driving drum 5. The The reason why the main drum 5 is thick is that it is necessary to provide the end insertion hole 5A and the wire guide groove 5B. The longitudinal axis of the one side throttle valve shaft 2A and the other side throttle valve shaft 2C are arranged on the same core 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 opposed to each other with a slight gap. FIG. 3 shows a second conventional example. The configuration of the main drum is different from the first conventional example of FIG. Only the differences will be described. The main drum 6 includes a plate member 6A and a drum member 6B. 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, for example, of 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. The The drum member 6B is firmly coupled to the plate-like member 6A by coupling means such as welding coupling, caulking coupling, adhesive coupling, and screw tightening coupling. The main driving drum 6 is screwed and fixed via a nut N onto the locking step 2D of the other throttle valve shaft 2C.
[0003]
In the first and second conventional examples, the end member fixedly disposed at the end portion of the accelerator wire is inserted and disposed in the end insertion holes 5A and 6C of the main drums 5 and 6, and the accelerator wire is disposed in the wire guide groove. Guide placement is provided in 5B and 6D. Thus, when the driver operates the accelerator wire, the operating force is transmitted to the main drums 5 and 6 through the end member, and the main drums 5 and 6 rotate according to the operation of the accelerator wire. According to the rotation of the main driving drums 5 and 6, the other throttle valve shaft 2C rotates synchronously with the main driving drums 5 and 6, and the second throttle valve 3B is connected to the other intake passage 1B on the other throttle body T2. Open and close. On the other hand, the rotation of the main driving drums 5 and 6 is transmitted to the driven lever 4 via a connection tuning device (not shown) disposed between the main driving drums 5 and 6 and the driven lever 4, and the driven lever 4 is transmitted to the main driving drum 5. , 6 rotate 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, the first throttle valve 3A and the second throttle valve 3B can be controlled to be opened and closed synchronously by driving the main drums 5 and 6.
[0004]
[Problems to be solved by the invention]
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, and the degree of freedom of mounting in various engines is increased. Is difficult. This is because the main drum 5 has a thickness A, and a nut N including a washer is disposed on the other side surface 5C of the main drum 5.
[0005]
Further, according to the second conventional example, the thick part of the main drum 6 is a plate-like member 6A having a thickness B, which corresponds to the difference (A−B) between the thickness A and the thickness B. Thus, the center pitch P2 can be reduced. However, since it is necessary to fix and arrange the drum member 6B with respect to the plate-like member 6A, the number of parts and the number of assembling steps increase, resulting in an increase in manufacturing cost.
[0006]
The present invention has been made in view of the above problems, and in a multiple throttle body, the center pitch of each adjacent throttle body can be reduced at low cost, and a multiple throttle with a high degree of freedom for mounting on various engines. It is an object of the present invention to provide a connection tuning device in a body.
[0007]
[Means for solving the problems]
In order to achieve the above object, the connection tuning device in the multiple throttle body according to the present invention has a first intake passage that is attached to a first throttle valve shaft that passes through the first intake passage and traverses the first intake passage. A throttle body on one side whose one side intake passage is opened and closed by a throttle valve;
The other side intake body is opened and closed by the second throttle valve attached to the other side throttle valve shaft passing through the other side intake path and crossing the other side intake path. Placed next to
The one side throttle valve shaft and the other side throttle valve shaft are arranged concentrically, and a driven lever is screwed and arranged at one end of the one side throttle valve shaft, and a main drum is screwed to the other end of the other side throttle valve shaft. Further, in the coupled tuning device in the multiple throttle body, the rotation of the main drum is transmitted to the driven lever via the coupled tuning device, and the first throttle valve and the second throttle valve are controlled to open and close synchronously.
At one end of the one-side throttle valve shaft, a driven lever made of a plate material with a female thread formed in the bent portion is screwed with a nut,
The main driving drum arranged at the other end of the other side throttle valve shaft is formed in a thick shape, and on its outer peripheral portion, an end insertion hole, a wire guide groove connected to the end insertion hole,
And a bent portion having a screw insertion groove that opens toward one side, and a bottomed concave portion having a bottom portion from the other side surface toward the one side surface is recessed, and the main drum is disposed on the bottom portion. A screw member that is screwed to the other end of the other throttle valve shaft with a nut arranged at the same time and screwed to the female screw of the driven lever is inserted into the screw insertion groove of the driven drum, and the driven lever is further folded. A spring is provided between the bent portion and the bent portion of the main drum .
[0008]
[Action]
According to the present invention, the nut that is screwed to the other end of the other throttle valve shaft is disposed in the bottomed recess that is recessed from the other side surface of the main drum toward the one side surface. Since the other end of the valve shaft is screwed , the center pitch of the adjacent throttle bodies can be reduced corresponding to the thickness of the bottomed recess. In addition, the drum portion having the wire end insertion hole and the wire guide groove can be integrally formed with the main drum by injection molding, lathe processing, etc., and the manufacturing cost is not increased.
[0009]
【Example】
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. In addition, the same code | symbol is used about the same structure part as a prior art example, and description is abbreviate | omitted. Reference numeral 7 denotes a driven lever made of a plate material disposed via a collar 20 on a locking step 2B formed on one end side of the one-side throttle valve shaft 2A. A bent portion 7A that is bent toward is formed, and a female screw 7B is formed in the bent portion 7A. The driven lever 7 is screwed and fixed toward the locking step 7B with a nut N via a washer.
[0010]
Reference numeral 9 denotes a thick main driving drum disposed via a collar 21 on a locking step 2D formed on the other end side of the other throttle valve shaft 2C. Are formed with an end insertion hole 9A and a wire guide groove 9B similar to those of the first conventional example, and further a bent portion 9C is formed toward one side (left side in the figure). The bent portion 9 </ b> C corresponds to the bent portion 7 </ b> A of the driven lever 7. The bent portion 9C is formed with a screw insertion groove 9D that opens toward one side. The bending portion 9C provided with the end insertion hole 9A, the wire guide groove 9B, and the screw insertion groove 9D is formed integrally with the main drum 9, for example, injection molding of synthetic resin, aluminum or the like, forging, cutting, etc. Formed by. And the bottomed recessed part 9H which has the bottom part 9G toward the one side surface 9F from the other side surface 9E of this main driving drum 9 is recessedly provided. In this example, the thickness B of the bottom 9G is the same as the thickness B of the plate member 6A of the second conventional example.
[0011]
The one side throttle valve shaft 2A and the other side throttle valve shaft 2C are the same in a state where the one side end T1a of the throttle body T1 on one side and the other side end T2b of the throttle body T2 on the other side are arranged to face each other. The opposite end portions of the throttle valve shafts 2A and 2C are disposed with a small gap S as in the conventional example of FIG.
[0012]
In the above state, the main drum 9 is disposed on the locking step 2D of the other throttle valve shaft 2C, and the main drum 9 is screwed and fixed with a nut N disposed on the bottom 9G via a washer. Is done. On the other hand, in this state, the bent portion 7A of the driven lever 7 and the bent portion 9C of the main drive lever 9 are arranged to face each other and are screwed to the female screw 7B of the bent portion 7A of the driven lever 7. The screw member 10 is inserted into the screw insertion groove 9D of the main drive lever 9, and the flange portion 10A of the screw member 10 is brought into contact with and locked on the bent portion. Reference numeral 11 denotes a lot nut for fixing the position of the screw member 10 after adjusting the screw, and reference numeral 12 denotes a spring stretched between the bent portions 9C and 7A. Accordingly, the connection tuning device R is constituted by the bent portions 9C and 7A, the spring 12, and the screw member 10.
[0013]
Here, when the driver operates the accelerator, the accelerator wire is displaced, and this displacement is transmitted to the main drum 9 through the end insertion hole 9A, and the main drum 9 rotates in accordance with the accelerator operation. That is, the rotation of the main driving drum 9 in the valve opening direction is transmitted to the bent portion 7A of the driven lever 7 via the bent portion 9C and the spring 12, and gives the driven lever 7 rotation in the valve opening direction. The rotation of the main drum 9 in the valve closing direction is transmitted to the bent portion 9C, the flange portion 10A of the screw member 10, the screw member 10, and the bent portion 7A of the driven lever 7. Giving rotation. Thus, the second throttle valve 3B of the throttle body T2 on the other side and the first throttle valve 3A of the throttle body T1 on the other side are synchronized with each other.
[0014]
On the other hand, when the screw member 10 is rotated, the relative rotation angle between the driven lever 7 and the main driving drum 9 can be changed, thereby opening the throttle valve between the second throttle valve 3B and the first throttle valve 3A. The degree can be tuned.
[0015]
Here, in the present invention, the center pitch P of the adjacent throttle bodies T1, T2 can be effectively reduced. That is, the nut N for fixing the main drum 9 on the locking step 2D of the other throttle valve shaft 2C is disposed on the bottom 9G of the bottomed recess 9H provided on the other side surface 9E of the main drum 9. . If it demonstrates further by FIG. 4 simplified, the bottom part 9G which has the thickness B will be arrange | positioned on the latching step part 2D, and the nut N will be screwed and arrange | positioned on this bottom part 9G. According to the above, the center pitch P3 between the throttle bodies T1 and T2 in the present invention can be reduced to at least the center pitch P2 similar to that of the second conventional example, as compared with the first conventional example ( The center pitch can be reduced corresponding to the difference of (A−B). Further, as described above, when the main drum 9 is provided with the bottomed recess 9H having the bottom 9G, the end insertion groove 9A, the wire guide groove 9B, and the bent portion 9C are integrated at the same time when the main drum 9 is formed. Thus, the increase in the manufacturing cost of the main drum 9 can be suppressed without causing an increase in the number of parts and an increase in assembly man-hours.
[0016]
【The invention's effect】
As described above, according to the connection tuning device for a multiple throttle body according to the present invention, the nut for screwing the main drum to the other end of the other throttle valve shaft is recessed from the other side of the main drum toward the one side. Since it is arranged in the provided bottomed recess, the center pitch between the adjacent throttle bodies can be reduced corresponding to the thickness B of the bottom of the bottomed recess. In addition, since the end insertion groove and the wire guide groove bent part are integrally formed in the main drum, as in the first example of the prior art, it is possible to suppress an increase in the manufacturing cost of the main drum, which is economically effective. It will be. Furthermore, since the nut on the main drum side is accommodated in the bottomed recess, the nut can no longer be seen from the outside, and the appearance can be clearly 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 of an essential part showing 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 an essential part showing a first example of a conventional multiple throttle body.
FIG. 3 is a longitudinal sectional view of an essential part showing a second example of a conventional multiple throttle body.
FIG. 4 is a longitudinal sectional view of an essential part of a multiple throttle body according to the present invention.
[Explanation of symbols]
T1, T2 Multiple throttle body 7 Driven lever N Nut 9 Main drum 9E Other side 9D of main drum 9H One side 9D of main drum

Claims (1)

A throttle body on one side whose one side intake path is opened and closed by a first throttle valve attached to a one side throttle valve shaft passing through the inside and passing through the one side intake path;
The other side intake body is opened and closed by the second throttle valve attached to the other side throttle valve shaft passing through the other side intake path and crossing the other side intake path. Placed next to
The one side throttle valve shaft and the other side throttle valve shaft are arranged concentrically, and a driven lever is screwed and arranged at one end of the one side throttle valve shaft, and a main drum is screwed to the other end of the other side throttle valve shaft. Further, in the coupled tuning device in the multiple throttle body, the rotation of the main drum is transmitted to the driven lever via the coupled tuning device, and the first throttle valve and the second throttle valve are controlled to open and close synchronously.
At one end of the one-side throttle valve shaft 2A, a driven lever 7 made of a plate material in which a female screw 7B is formed in the bent portion 7A is screwed with a nut N,
The main driving drum 9 disposed at the other end of the other side throttle valve shaft 2C is formed in a thick shape, and on its outer peripheral portion, an end insertion hole 9A, a wire guide groove 9B connected to the end insertion hole 9A,
A bent portion 9C having a screw insertion groove 9D that opens toward one side;
Are formed integrally, and a bottomed recess 9H having a bottom portion 9G is formed from the other side surface 9E toward the one side surface 9F, and the main drum is connected to the other side throttle valve shaft by a nut N disposed on the bottom portion 9G. A screw member 10 that is screwed to the other end side of 2C and screwed to the female screw 7B of the driven lever 7 is inserted into the screw insertion groove 9D of the main driving drum 9, and is further connected to the bent portion 7A of the driven lever 7 and the main driving. A connection tuning device in a multiple throttle body , wherein a spring 12 is contracted between the bent portion 9C of the drum 9 and the spring 9 is bent .

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