JP2001193495A - Intake air quantity control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate assembling work by preventing axial dislocation of a washer. SOLUTION: In an intake air quantity control device, such that a distance collar 30A is interposed between an inner ring provided on a wheel bearing between an intake air passage body 13 and a valve shaft 17, and that a throttle lever is energized in the direction of closing a throttle valve and a lever collar 32 is energized in a direction of closing to the throttle lever by a return spring surrounding the cylindrical lever collar 32 surrounding the distance collar, and that a relative sliding motion between the throttle lever and the lever collar is ensured by a synthetic resin washer, an inner circumference of a washer 37 is retained on the outer circumference of the distance collar 30A by a washer- retaining device 38. The washer 27 is thereby arranged nearly coaxially with the valve shaft 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a valve shaft to which a throttle valve is fixedly attached, at least one end of which protrudes from an intake passage body. A distance collar is sandwiched between the throttle lever and the throttle lever, and an operation force from an input lever fixed to a cylindrical lever collar surrounding the distance collar is transmitted to the throttle lever via an operation force transmission spring. The distance collar is surrounded by a coil-shaped return spring that exerts a spring force for urging the throttle lever toward the closing side of the throttle valve and a spring force for bringing the lever collar close to the throttle lever, and the relative sliding of the throttle lever and the lever collar. Synthetic resin washer to secure throttle lever and distor One of the scalar and to the intake air amount control system sandwiched between lever color.

[0002]

2. Description of the Related Art Conventionally, such an intake amount control device is constructed as shown in FIG. 5, in which a throttle lever 19 is fixed to one end of a valve shaft to which a throttle valve 14 is fixed, and an inner race 28a of a ball bearing 28 is fixed. And throttle lever 1
9, a distance collar 30 is held between the outer end of a lever collar 32 surrounding the distance collar 30 and the throttle lever 19, and a ring-shaped washer 37 is sandwiched as shown by a chain line. ing.

[0003]

However, in the prior art described above, when the distance collar 30, the throttle lever 19, the lever collar 32 including the input lever 20, the washer 37 and the return spring 36 are assembled, a solid line in FIG. As shown, the washer 37 tends to come off the outer periphery of the distance collar 30. This is the return spring 36
When assembling while pressing the throttle lever 19 against the intake passage body 13 against the spring force of the above, the ring-shaped washer 37 is pushed toward the throttle lever 19 by the lever collar 32 by the spring force of the return spring 36. The distance collar 30 and the throttle lever 1 while preventing the washer 37 from being axially displaced.
9, lever collar 32, washer 37 and return spring 3
It is difficult to assemble 6.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an intake air amount control device that prevents a washer shaft from being displaced and facilitates an assembling operation.

[0005]

In order to achieve the above object, the present invention is directed to an intake passage body forming an intake passage, an annular step facing outward, and a central portion of the step. A valve shaft protruding from the intake passage body at one end and projecting at least the one end from the intake passage body, and a valve shaft rotatably supported by the intake passage body; and an opening degree of the intake passage can be controlled. A butterfly-type throttle valve fixed to the valve shaft, a ball bearing provided between the intake passage body and the valve shaft, and an inner end abutting against an outer surface of an inner ring provided in the ball bearing to surround the valve shaft. A cylindrical distance collar, a throttle lever fastened to a screw shaft of the valve shaft and abutting against an outer end of the distance collar, and a limited range of the throttle lever. A cylindrical lever collar surrounding the distance collar so as to enable relative rotation of the distance collar; and an input lever fixed to the lever collar so as to be capable of inputting an operation force and arranged on the inner side of the throttle lever. An operating force transmitting spring for transmitting an operating force from the input lever to the throttle lever, a spring force for urging the throttle lever to close the throttle valve, and a direction in which the lever collar approaches the throttle lever. A coil-shaped return spring that exerts a spring force for urging the lever collar and surrounds the lever collar, and one of the throttle lever and the distance collar to ensure relative sliding of the throttle lever and the distance collar; Arranged almost coaxially with the valve shaft between the lever collars And a washer holding means for holding the inner periphery of the washer on the outer periphery of the distance collar and disposing the washer substantially coaxially with the valve shaft. It is characterized by.

According to such a configuration, when the distance collar, the throttle lever, the lever collar including the input lever, the washer, and the return spring are assembled, it is possible to prevent the washer from being displaced in the axis. It is possible to prevent the axial displacement of the washer from occurring and to facilitate the assembling operation.

[0007] The invention according to claim 2 provides the above-described claim 1.
In addition to the configuration of the invention described above, the washer holding unit includes:
A flange that projects radially outward from the outer end of the distance collar and abuts against the inner surface of the throttle lever, the washer formed in a ring shape surrounding the outer periphery of the distance collar includes an inner surface of the flange and It is characterized by being sandwiched between the outer end surfaces of the lever collar, and according to such a configuration, in a state where the washer is mounted on the outer periphery of the distance collar, even if the washer is pushed by the lever collar on which the spring force of the return spring acts. The washer does not come off the outer periphery of the distance collar merely by abutting against the flange portion, thereby preventing the washer from being displaced in the axis and facilitating the assembling work.

According to a third aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the washer holding means is formed in a ring shape surrounding the outer periphery of the distance collar, and has an outer end surface of the lever collar. A cylindrical portion integrally connected to an inner periphery of the washer sandwiched between inner surfaces of the throttle lever and extending to a side opposite to the throttle lever; and an inner periphery of an outer end portion of the lever collar so that the cylindrical portion can be inserted. Characterized by comprising a recess provided in the
According to this configuration, the lever collar on which the spring force of the return spring acts by inserting the distance collar into the lever collar with the cylindrical part inserted into the concave portion on the inner periphery of the outer end of the lever collar and performing assembly Even when the washer is pressed, the cylindrical portion integral with the washer is held around the outer periphery of the distance collar, so that the washer does not come off the outer periphery of the distance collar, and the shaft is prevented from being displaced. Attachment work can be facilitated.

According to a fourth aspect of the present invention, in addition to the configuration of the third aspect of the present invention, the cylindrical portion is lightly press-fitted into the concave portion. Since the assembly can be performed while being temporarily fixed to the collar, the assembling operation is further simplified.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on embodiments of the present invention shown in the accompanying drawings.

FIGS. 1 to 3 show a first embodiment of the present invention. FIG. 1 is an overall plan view of an intake air amount control device, FIG. 2 is a side view of FIG. FIG. 3 is a sectional view taken along line 3-3 of FIG.

Referring first to FIGS. 1 and 2, this intake air amount control device is for a V-type two-cylinder engine mounted on a motorcycle, for example, and has a first and a second engine individually corresponding to each cylinder of the engine. 2 throttle body 11A, 1
1B.

The first and second throttle bodies 11A, 11A,
11B are intake passage bodies 1 forming intake passages 12 connected to intake ports of respective cylinders in the engine.
3, a butterfly type throttle valve 14 which is capable of controlling the opening degree of the intake passages 12 is rotatably supported, and extends in a direction perpendicular to the rotation axis of each throttle valve 14. It is arranged so as to form a pair at two places spaced apart from each other.

The intake passage bodies 13 of both throttle bodies 11A, 11B have the same shape, and the two intake passage bodies 13 provided in the two intake passage bodies 13 respectively.
Are set symmetrically with respect to a center C between the two intake passages 12... Set on a straight line L passing through the axis of. The two intake passage bodies 13 are arranged at an interval in a direction parallel to the rotation axis of the throttle valves 14, and a pair of connecting members 15 both of which form a substantially right-angled quadrilateral. , 16 and their connecting members 15, 1
Reference numeral 6 denotes a flat plate parallel to the straight line L.

Each of the throttle valves 14 is fixed to a valve shaft 17 rotatably supported by the intake passage body 13. The valve shaft 17 protrudes from the intake passage body 13 of the first throttle body 11A. A throttle lever 19 is secured to one end of the valve shaft 17 and a throttle drum 18 is secured to one end of a valve shaft 17 protruding from the intake passage body 13 of the second throttle body 11B. Moreover, the throttle lever 1 is attached to the valve shaft 17 on the first throttle body 11A side.
An input lever 20 capable of relative rotation within a limited range of 9 is mounted, and the input lever 20 and the throttle drum 18 are connected via an interlocking member 21. By rotating the throttle drum 18 with a throttle wire (not shown), both valve shafts 17 rotate in conjunction with each other, and the opening of each throttle valve 14 is controlled in conjunction with each other. An opening sensor S for detecting the opening of the throttle valve 14 is attached to the intake passage body 13 of the second throttle body 11B, and is opened at the other end of the valve shaft 17 on the side opposite to the throttle drum 18. The degree sensor S is connected.

On both sides of the intake passage bodies 13 in each of the throttle bodies 11A and 11B, fuel is injected into each of the intake passages 12 downstream of the throttle valves 14 provided in the throttle bodies 11A and 11B. A pair of fuel injection valves V, V are respectively mounted so that the axes are arranged in a plane orthogonal to the axis of the valve shafts 17.

Each of the fuel injection valves V is sandwiched between an intake passage body 13 and a valve support member 23 attached to the intake passage body 13. Valve support member 2
Reference numeral 3 denotes a pair of valve support members 23, 23 having a fuel passage communicating with the rear ends of the fuel injection valves V, V and fastened to the intake passage body 13 for each throttle body 11A, 11B.
Are generally U-shaped pipes 24, 2 communicating with the fuel passage.
4 are connected to each other, and both ends of a substantially U-shaped pipe 25 communicating with the fuel passage are provided on valve support members 23 for mounting the fuel injection valves V on the first and second throttle bodies 11A and 11B. Are linked. A fuel inflow joint 26 for connecting to a fuel supply pump (not shown) is attached to a valve support member 23 for attaching the fuel injection valve V to the second throttle body 11B, and the fuel injection valve V is attached to the first throttle body 11A. A regulator 27 for returning surplus fuel to a fuel tank (not shown) is connected to the valve support member 23 for attaching the valve.

In FIG. 3, the first throttle body 11
One end of the valve shaft 17 on the A side is a ball bearing 2
8 protrudes outward from the intake passage body 13 with the valve shaft 8 interposed between the intake shaft body 13 and the valve shaft 17.
A ball bearing 29 is interposed between the other end of the body and the intake passage body 13. Moreover, a step 17a facing outward is formed at one end of the valve shaft 17, and the step 1
A screw shaft portion 17b projecting outward from the center of 7a is integrally provided.

The intake passage body 1 at one end of the valve shaft 17
3 is surrounded by a cylindrical distance collar 30A whose inner end is in contact with the outer surface of the inner ring 28a in the ball bearing 28, and the throttle lever 19 is in contact with the outer end of the distance collar 30A. You. The screw shaft portion 17b of the valve shaft 17 is inserted through the center of the throttle lever 19, and the nut 31 screwed to the screw shaft portion 17b is tightened, so that the distance of the throttle lever 19 is increased. The screw shaft 1 is held between the outer end of the collar 30A and the nut 31.
7b, the distance collar 30A is connected to the inner race 28a of the ball bearing 28 and the throttle lever 1
9 and rotates together with the throttle lever 19.

The distance collar 30A is surrounded by a cylindrical lever collar 32A.
Is fixed to the outer periphery of the lever collar 32A. The input lever 20 is provided with a connecting pin 33 having an axis parallel to the valve shaft 17, and the interlocking member 21 is connected to the connecting pin 33. That is, the operating force input to the throttle drum 18 of the second throttle body 11B is input to the input lever 20 via the interlocking member 21.

Input lever 20 and throttle lever 1
9 includes opposed plate portions 2 which are opposed to each other in the circumferential direction of the valve shaft 17.
0a, 19a are provided, and one end is provided at the input plate portion 19a.
Is fixedly inserted into the opposing plate portion 20a, and the shaft 3
The other end of 4 can be engaged with the outer surface of the opposing plate portion 20a. A coil-shaped operating force transmitting spring 35 surrounding the shaft 33 is contracted between the two opposed plate portions 19a, 20a. The input lever 20, that is, the lever collar 32A is provided with respect to the throttle lever 19 and the distance collar 30A. The operating force transmitting spring 35 transmits the operating force from the input lever 20 to the throttle lever 19.

The distance collar 32A is surrounded by a coil-shaped return spring 36. One end of the return spring 36 is in contact with the input lever 20 and is engaged with the throttle lever 19, and the other end of the return spring 36 is , Is brought into contact with the intake passage body 13 and is engaged with the intake passage body 13. The return spring 36 exerts a spring force for urging the throttle lever 19 to close the throttle valve 14 and a spring force for urging the lever collar 32A in a direction in which the lever collar 32A approaches the throttle lever 19.

The relative sliding between the throttle lever 19 and the lever collar 32A is ensured by a synthetic resin washer 37. The washer 37 is formed of a synthetic resin in a ring shape and is substantially coaxial with the valve shaft 17. Placed in

The collar 38 as washer holding means for holding the inner periphery of the washer 37 on the outer periphery of the distance collar 30A and for arranging the washer 37 substantially coaxially with the valve shaft 17 is provided by a distance collar. 30A is provided integrally with an outer end of the throttle lever 38 so as to project radially outward from the outer end.
9, the washer 37 is sandwiched between the inner surface of the flange portion 38 and the outer end surface of the lever collar 32A.

Next, the operation of the first embodiment will be described. The inner surface of the flange 38 which projects radially outward from the outer end of the distance collar 30A and contacts the inner surface of the throttle lever 19, and the outer surface of the lever collar 32A A ring-shaped washer 37 is sandwiched between the ends. Therefore, when the washer 37 is attached to the outer periphery of the distance collar 30A, the lever collar 3 on which the spring force of the return spring 36 acts.
Even if the washer 37 is pushed by 2A, the washer 3
7 is a distance collar 30 just contacting the collar 38.
It does not come off the outer periphery of A.

Therefore, when assembling the distance collar 30A, the throttle lever 19, the lever collar 32A including the input lever 20, the washer 37 and the return spring 36 to the intake passage body 13, the axial deviation of the washer 37 is prevented. Is possible, and it is possible to prevent the axial deviation of the washer 37 from occurring, thereby facilitating the assembling work.

FIG. 4 shows a second embodiment of the present invention, in which parts corresponding to those in the first embodiment are denoted by the same reference numerals.

A protruding portion of one end of the valve shaft 17 from the intake passage body 13 is connected to an inner race 28 of the ball bearing 28.
a, which is surrounded by a cylindrical distance collar 30B having an inner end in contact with the outer surface of the distance collar 30B.
The distance collar 30A is surrounded by a cylindrical lever collar 32B that can rotate relative to B in a limited range.

The relative sliding of the throttle lever 19 and the lever collar 32B is formed in a ring shape surrounding the outer periphery of the distance collar 30B, and is made of a synthetic resin sandwiched between the outer end surface of the lever collar 32B and the inner surface of the throttle lever 19. The washer 37 is secured by a washer 37. The washer holding means 39 for holding the inner periphery of the washer 37 on the outer periphery of the distance collar 30B and disposing the washer 37 substantially coaxially with the valve shaft 17 is provided by the washer 37. 3
A cylindrical portion 40 which is integrally connected to the inner periphery of the cylinder 7 and extends on the opposite side to the throttle lever 19; and a concave portion 41 provided on the inner periphery of an outer end portion of the lever collar 32B so that the cylindrical portion 40 can be inserted. The cylindrical portion 40 is lightly pressed into the concave portion 41.

According to the second embodiment, the lever collar 3
By inserting the distance collar 30B into the lever collar 32B with the cylindrical portion 40 inserted into the concave portion 41 on the inner periphery of the outer end of the 2B and assembling, the lever collar 32B on which the spring force of the return spring 36 acts. Even when the washer 37 is pushed, the cylindrical portion 40 integral with the washer 37 is held on the outer periphery of the distance collar 30B, so that the washer 37 does not come off the outer periphery of the distance collar 30B, and the axis of the washer 37 is shifted. Can be prevented, and the assembling operation can be facilitated.

Moreover, since the cylindrical portion 40 is lightly press-fitted into the concave portion 41, the assembling operation can be performed with the washer 37 temporarily fixed to the lever collar 32B, and the assembling operation can be further facilitated.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the appended claims. It is possible.

[0033]

As described above, according to the present invention, when assembling the distance collar, the throttle lever, the lever collar having the input lever, the washer, and the return spring, the washer is not required. It is possible to prevent the occurrence of the axial deviation, and to prevent the axial deviation of the washer from occurring, thereby facilitating the assembling work.

According to the invention described in claim 4, the assembling work can be further facilitated.

[Brief description of the drawings]

FIG. 1 is an overall plan view of an intake air amount control device.

FIG. 2 is a side view of FIG.

FIG. 3 is a sectional view taken along line 3-3 of FIG. 2;

FIG. 4 is a sectional view corresponding to FIG. 3 of a second embodiment.

FIG. 5 is a sectional view corresponding to FIG. 3 of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 ... Intake passage 13 ... Intake passage body 14 ... Throttle valve 17 ... Valve shaft 17a ... Step 17b ... Screw shaft 19 ... Throttle lever 20 ... Input lever 28 ... ball bearing 28a ... inner ring of ball bearing 30A, 30B ... distance collar 32A, 32B ... lever collar 35 ... operating force transmission spring 36 ... return spring 37 ... washer Reference numeral 38 denotes a flange portion as a washer holding unit 39... A washer holding unit 40... A cylindrical portion 41.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Setsuo Otsuki 1971 Kakuta Jiryu, Kakuda City, Miyagi Prefecture F-term in Keihin Kakuda Development Center Co., Ltd. 3G065 AA04 BA01 CA00 GA46 HA03 HA12 HA15 HA21 HA22

Claims (4)

[Claims] 1. An intake passage body (13) forming an intake passage (12), an annular step (17a) facing outward, and a screw shaft (1) projecting from the center of the step (17a).
7b) on one end side and a valve shaft (17) rotatably supported by the intake passage body (13) with at least one end protruding from the intake passage body (13).
And a butterfly type throttle valve (14) fixed to the valve shaft (17) so as to control the opening degree of the intake passage (12), and between the intake passage body (13) and the valve shaft (17). A ball bearing (28) provided;
A cylindrical distance collar (30A, 30B) surrounding the valve shaft (17) with its inner end in contact with the outer surface of an inner ring (28a) provided in the ball bearing (28); A throttle lever (19) fastened to the screw shaft portion (17b) and in contact with an outer end of the distance collar (30A, 30B);
9) and a cylindrical lever collar (32A, 32B) surrounding the distance collars (30A, 30B) to enable relative rotation within a limited range, and an lever force (32A) capable of inputting an operation force. , 32B) and an input lever (20) disposed inside the throttle lever (19), and the input lever (2).
0) to the throttle lever (19), an operating force transmitting spring (35), a spring force for urging the throttle lever (19) to close the throttle valve (14), and Lever collar (32A, 3
2B) exerts a spring force for urging the lever collars (32A, 32B) in a direction in which the lever collars (32A, 32B) approach the throttle lever (19), and a coiled return spring (36) surrounding the lever collars (32A, 32B). ), The throttle lever (19) and the lever collar (32A, 3).
2B) to ensure relative sliding of the throttle lever (19) and the distance collars (30A, 30B).
And a synthetic resin washer (37) disposed between the lever collars (32A, 32B) and substantially coaxially with the valve shaft (17), wherein the washer (37) ) Includes washer holding means (38, 39) for holding the washer (37) substantially coaxially with the valve shaft (17) while holding the inner circumference of the distance collar (30A, 30B) at the outer circumference. An intake air amount control device characterized by the following. 2. The collar (38), which extends radially outward from the outer end of the distance collar (30A) and abuts against the inner surface of the throttle lever (19), comprises a washer holding means. The washer (3) formed in a ring shape surrounding the outer periphery of 30A).
7. The intake air amount control device according to claim 1, wherein 7) is sandwiched between an inner surface of the flange portion (38) and an outer end surface of the lever collar (32A). 3. The washer holding means (39) is formed in a ring shape surrounding the outer circumference of the distance collar (30B), and is provided between the outer end face of the lever collar (32B) and the inner face of the throttle lever (19). And a cylindrical portion (4) which is integrally connected to the inner periphery of the washer (37) and extends to the opposite side to the throttle lever (19).
0) and a concave portion (4) provided on the inner periphery of the outer end of the lever collar (32B) so that the cylindrical portion (40) can be inserted.
2. The intake air amount control device according to claim 1, wherein the intake air amount control device comprises: 4. The cylindrical portion (40) is provided with the concave portion (41).
4. The intake air amount control device according to claim 3, wherein the intake amount control device is lightly press-fitted.