JPH04129864U - Sliding valve type vaporizer - Google Patents

Abstract

(57) [Summary] [Purpose] When replacing the piston valve, idle adjustment,
In addition, in the case of twin carburetors, there is no need for synchronization adjustment. [Configuration] Free lever 32 is connected to throttle shaft 21
Attached so that it can rotate relative to the The connecting lever to which the piston valve is connected and the engaging member 31 are integrally fixed to the throttle shaft 21. From the position where the piston valve is in the fully open position and the free lever 32 contacts the stopper 41, the connecting lever and the engaging member 31 can further rotate. The coupling lever is therefore free to rotate to a position where the piston valve can be removed.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is applicable to sliding valve type carburetors installed in engines such as racing cars. related.

0002

[Conventional technology]

In conventional sliding valve type carburetors, the piston valve is connected to the throttle shaft. Connected via a bar, and the connecting lever is integrally attached to the throttle shaft with a screw. Fixed. Also, the throttle wire lever connected to the throttle wire is attached to the throttle shaft in such a way that it cannot be easily disassembled. Therefore, the rotation of the throttle shaft is restricted when the piston valve is in the fully open position. ing. Therefore, replace the piston valve with one that meets the engine operating conditions. When replacing the piston valve, first remove the screw from the carburetor body. Loosening allows the connecting lever to rotate freely relative to the throttle shaft. Then rotate the connecting lever to open the space above the piston valve. It is necessary.

0003

[Problem that the idea aims to solve]

When re-securing the connecting lever after replacing the piston valve, If the relative position of the throttle shaft deviates from the state before replacement, the eye The dollar opening does not reach the specified size. Therefore, in such exchange work, always In addition, it is necessary to adjust the idle opening degree, which makes the replacement work complicated. Especially in the case of twin carburetors, the synchronization between each carburetor must be readjusted. , this requires a special adjustment device, which is not commercially available. Therefore, tuning is difficult. In view of the above problems, this invention has been developed to adjust the idle when replacing the piston valve. or to provide a sliding valve type carburetor that does not require synchronization adjustment. It is something that was given.

0004

[Means to solve the problem]

The vaporizer according to the present invention changes the flow area of the air passage formed in the vaporizer body. A piston valve that is attached to the main body of the carburetor, and a slot that is rotatably supported around the axis of the carburetor body. A piston valve that is integrally fixed to this throttle shaft and a piston valve that is integrally fixed to this throttle shaft. A connecting lever that is connected to the throttle shaft, and an engaging part that is integrally fixed to the throttle shaft. It is connected to the valve opening/closing mechanism and can rotate relative to the throttle shaft. A free lever that is attached and can be engaged with an engaging member, and a piston valve. The piston valve is equipped with a stopper that locks the free lever in the fully open position of the piston valve. By operating the valve opening/closing mechanism, the free lever, engaging member, and slot The free lever is displaced via the free shaft and the connecting lever, and the connecting lever is From the position where the piston valve is locked to the topper, the direction in which the piston valve opens the air passage and It is characterized by being able to rotate in the same direction.

[0005]

【Example】

The present invention will be explained below with reference to the illustrated embodiments. 1, 2, and 3 schematically show the structure of a sliding valve type carburetor according to an embodiment of the present invention. This is what is shown. In this example, the present invention is applied to a twin carburetor, In FIG. 2 two vaporizers are shown.

[0006] The air passage 12 formed in the carburetor body 11 has an air passage movable in a direction perpendicular to the air passage 12. A piston valve 13 is provided which is capable of operating. This piston valve 13 is the carburetor main body 1 It is slidably supported by a wall surface formed in 1 and can be moved vertically in FIG. By positioning the air passage 12, the flow area of the air passage 12 is changed. piston valve 13 A float chamber 14 is provided below, and the fuel stored in this float chamber 14 is The fuel is directed through the fuel passage 15 to the air passage 12. Fuel passing through fuel passage 15 The flow rate of is regulated by a needle valve 16. Needle valve 16 is a piston It is integrally fixed to the piston valve 13 and protrudes downward from the piston valve 13. and inserted into the fuel passage 15.

[0007] The carburetor body 11 also includes a throttle shaft, as shown in FIGS. 1 and 4. A foot 21 is rotatably supported around an axis, and a throttle shaft 21 is connected to the throttle shaft 21. The lever 22 is integrally fixed by a lever set screw 23. Sunawa In other words, the connecting lever 22 can swing freely around the axis of the throttle shaft 21. Ru. A pin is connected to the swinging end of the connecting lever 22 via a plate 24 and a connector 25. A stone valve 13 is connected. The plate 24 is connected to the connecting lever 22 by a pin 26. and is also connected to the protrusion 29 of the connector 25 by a pin 27. Linking A spring 28 is provided between the lever 22 and the connector 25, and a spring 28 is provided between the lever 22 and the connector 25. Generation of backlash between the bars 22 is prevented.

[0008] The throttle shaft 21 is connected to two adjacent carburetors as shown in FIG. I am a connoisseur. That is, the throttle shaft 21 protrudes to the outside of the carburetor main body 11. and is also supported by the other carburetor body.

[0009] An engaging member 31 is provided on the protruding portion of the throttle shaft 21 from the carburetor main body 11. are integrally fixed, and a free lever 32 is provided adjacent to this engaging member 31. I get kicked. Free lever 32 can rotate relative to throttle shaft 21 can be attached to.

0010 As shown in FIG. 3, the engaging member 31 has first and second parts extending in opposite directions. It has two arms 33 and 34. Above the first arm 33 is an idle set station. A screw 35 is provided, and as is conventionally known, the first arm 33 is located at the idle position. By locking the tip 36 of the set screw 35, the piston valve 13 The idle opening degree is determined. On the other hand, the second arm 34 has a free lever 32. The free lever can be engaged via the throttle wire 37, as described below. 32 is rotated clockwise in FIG. 34, the engagement member 31, throttle shaft 21 and connection The lever 22 rotates and the piston valve 13 and needle valve 16 are displaced. It will be done. Note that the engaging member 31 is operated by a spring 39 fitted to the throttle shaft 21. direction in which the idle set screw 35 is always engaged (i.e. idle operation direction).

[0011] The free lever 32 is connected to an accelerator pedal (not shown) via a throttle wire 37. Connected to Daru. In other words, the throttle wire 37 and the accelerator pedal are This constitutes a valve opening/closing mechanism that opens and closes the valve 13. As shown in FIGS. 2 and 5, the free lever 32 has a A protruding portion 38 is formed. This protrusion 38 is located in the assembled state of the carburetor. is engaged with the engaging member 31 at all times, and therefore the flap is engaged with the engaging member 31 during engine operation. The lever 32 and the engagement member 31 operate integrally.

0012 As shown in FIGS. 3 and 6, a stopper 4 is provided above the free lever 32. 1, and the free lever 32 has a protrusion 42 that can be engaged with the stopper 41. is formed. In these figures, the throttle wire 37 is pulled upwards. As a result, the free lever 32 rotates clockwise, and this rotation is caused by the protrusion 42 sliding. It is regulated by the position where it is locked to the topper 41. This position is piston valve 1 3 is the fully open position.

[0013] The operation of the device of this embodiment will be explained. As shown in FIG. 3, the throttle wire 37 is normally connected by a spring (not shown). By being pulled upward, the free lever 32 is biased clockwise, and the engaging member 31. In the idling state, the engagement member 31 is connected to the spring 39 (FIG. 2). , and is locked to the idle set screw 35. Here, the accelerator pedal When the lever is depressed and the throttle wire 37 is pulled, the free lever 32 and The engaging member 31 is rotated clockwise against the elastic force of the spring 39. As a result, the throttle shaft 21 and the connecting lever 22 are rotated in the opposite direction in FIG. It rotates clockwise, and the piston valve 13 and needle valve 16 are displaced upward. . As a result, the amount of fuel supplied to the air passage 12 is controlled. Free lever 32 is rotatable to a position where it abuts against the stopper 41, and in this position the piston The valve 13 becomes fully open.

[0014] When replacing the piston valve 13 and needle valve 16, first 3 (FIG. 4), the connector 25 is released from the piston valve 13. Next, as shown in FIG. 7, the connecting lever 22 is rotated counterclockwise. this At this time, the free lever 32 is in the position where it locks with the stopper 41 as shown in FIG. Although it stops, the throttle shaft 21 and free lever 32 are relatively rotatable. Therefore, the connection lever 22, throttle shaft 21 and engagement member 31 are Furthermore, it can be rotated counterclockwise in FIG. In other words, the connecting lever 22 The air valve 13 is rotatable in the same direction as the direction in which the air passage 12 is opened. did Therefore, the connecting lever 22 has the connector 25, plate 24, etc. connected to the piston valve. The piston valve 1 can be rotated to a position where the upper part of the piston valve 13 is opened. 3 and the needle valve 16 are easily removed from the carburetor body 11.

[0015] Once the piston valve 13 and needle valve 16 have been replaced, the above-mentioned operations will be performed. Rotate the connecting lever 22 clockwise in FIG. 25 is fixed to the piston valve 13. As a result, the piston valve 13 and knee The assembly of the dollar valve 16 is completed. In such a replacement work, the throttle shaft 21 and the connecting lever 22 must be mutually connected. Assembling the piston valve 13 and needle valve 16 is easy since there is no need to remove each other. There is no need to perform idle or tune adjustments after the Therefore, the piston valve The work of replacing the lubricant 13 and the like is very simple and can be completed in a short time.

[0016] Note that the connecting lever 22 is connected to the throttle shaft 21 through a lever set screw. It may be fixed by a member other than the queue 23.

[0017]

[Effect of the idea]

As described above, according to the present invention, idle adjustment or There is no need to perform tuning adjustment, which simplifies the replacement work. can get.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a sliding valve type carburetor according to an embodiment of the present invention.

FIG. 2 is a partially cutaway plan view showing the vaporizer of FIG. 1;

FIG. 3 is a side view showing the carburetor of FIG. 1 as seen from the free lever side.

FIG. 4 is a plan view showing the configuration around the connection lever.

FIG. 5 is a plan view showing a free lever and an engaging member.

FIG. 6 is a side view showing a free lever and an engaging member.

FIG. 7 is a sectional view showing a state in which the connector is removed from the piston valve.

[Explanation of symbols]

11 Vaporizer body 12 Air passage 13 Piston valve 21 Throttle shaft 22 Connection lever 31 Engagement member 32 Free lever 41 Stopper

Claims (1)

[Scope of utility model registration request] Claim 1: A piston valve that changes the flow area of an air passage formed in a carburetor body, a throttle shaft rotatably supported by the carburetor body around an axis, and a piston valve integrally attached to the throttle shaft. a connecting lever that is fixed and to which the piston valve is connected; an engaging member that is integrally fixed to the throttle shaft; and an engaging member that is connected to a valve opening/closing mechanism and is attached to be rotatable relative to the throttle shaft. The piston valve is provided with a free lever that can be engaged with the engaging member, and a stopper that is engaged with the free lever when the piston valve is in a fully open position, and the piston valve is configured to operate the free lever by operating the valve opening/closing mechanism. , the engaging member, the throttle shaft, and the connecting lever, and the connecting lever further rotates from the position where the free lever is locked to the stopper in the same direction as the direction in which the piston valve opens the air passage. A sliding valve type vaporizer characterized in that: