CN210343526U - Semi-automatic choke valve and fuel supply system with same - Google Patents

Abstract

The utility model provides a semi-automatic choke valve and have its fuel feed system, this fuel feed system include the body and install choke valve and shift fork on the body, the shift fork with the choke valve is connected, and its choke valve is semi-automatic choke valve, and this semi-automatic choke valve includes the choke valve axle and installs the epaxial choke flap of choke valve, the choke valve axle includes axis body, choke valve rocking arm and torsional spring, the one end of axis body is installed on the choke valve rocking arm, the axis body is close to choke valve rocking arm department installs the spacer pin, the both ends difference joint of torsional spring is in the choke valve rocking arm with on the spacer pin, be provided with the flap mounting groove on the axis body, the choke flap is installed in the flap mounting groove. The utility model discloses can close when the choke valve starts at the engine, open certain aperture with the choke valve automatically, avoid appearing the engine start problem because of fuel concentration is too high, improve the stability that the engine started.

Description

Semi-automatic choke valve and fuel supply system with same

Technical Field

The utility model relates to a fuel feed system, especially a semi-automatic choke valve and have its fuel feed system.

Background

Referring to fig. 1, fig. 1 is a schematic diagram of a prior art fuel delivery system. As shown in fig. 1, the choke shaft 10 is a whole, the choke plate 20 is mounted on the choke shaft 10, and the fork 30 rotates the choke shaft 10 to fully open and fully close the choke plate 20. When the choke flap 20 is fully closed, the choke flap 20 cannot be opened by itself under the condition that the shifting fork 30 is not moved, the air inlet amount is relatively small, the fuel concentration in the mixing chamber is relatively high at the moment, and the engine is difficult to start due to the fact that the fuel concentration in the mixing chamber is relatively high and the engine is not diluted by more air, so that the engine is easy to be blocked, exploded and the like, and the performance of the engine is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to the above-mentioned defect of prior art, provide a semi-automatic choke valve and have its fuel feed system, can open certain aperture with the choke valve automatically when the engine closes the choke flap and starts.

In order to achieve the above object, the utility model provides a semi-automatic choke valve installs on fuel supply system's body, wherein, semi-automatic choke valve includes the choke valve axle and installs the epaxial choke flap of choke valve, the choke valve axle includes axis body, choke valve rocking arm and torsional spring, the one end of axis body is installed on the choke valve rocking arm, the axis body is close to choke valve rocking arm department installs the spacer pin, the both ends difference joint of torsional spring is in the choke valve rocking arm with on the spacer pin, be provided with the flap mounting groove on the axis body, the choke valve flap is installed in the flap mounting groove.

The semi-automatic choke valve comprises a rocker arm main body, a mounting hole is formed in the middle of the rocker arm main body, a limiting groove is formed in the rocker arm main body and located on one side of the mounting hole, and one end of a limiting pin is located in the limiting groove.

In the semi-automatic choke valve, the limiting groove is an arc-shaped groove, and the arc center line of the arc-shaped groove is coaxial with the axis of the mounting hole.

The semi-automatic choke valve is characterized in that a shifting fork sliding groove is further formed in the rocker arm main body, and the shifting fork sliding groove is located on one side of the limiting groove and penetrates through the rocker arm main body.

The semi-automatic choke valve is characterized in that a split retainer ring mounting groove is formed in the top end of the shaft body, and the shaft body is mounted in the mounting hole and connected through the split retainer ring in a clamping mode.

In the semi-automatic choke valve, the shaft body is provided with a threaded hole corresponding to the door sheet mounting groove, and the choke door sheet is mounted on the shaft body in a locking manner through the screw.

In the semi-automatic choke valve, the two threaded holes are vertically symmetrically arranged, and the axes of the two threaded holes are parallel to each other and are located in the same plane as the axis of the shaft body.

In the semi-automatic choke valve, the door sheet mounting groove is located on one side of the shaft body and is close to the lower portion of the shaft body.

In the semi-automatic choke valve, the limit pin is press-fitted in the limit pin mounting hole of the shaft body.

In order to better realize the above-mentioned purpose, the utility model also provides a fuel supply system, include the body and install choke valve and shift fork on the body, the shift fork with the choke valve is connected, wherein, the choke valve is foretell semi-automatic choke valve.

The technical effects of the utility model reside in that:

the utility model discloses receive the effect of engine suction in the start-up process, certain angle is opened by oneself to the choke flap of former full cut-off, can mix with fuel in more air suction mixing chambers, dilutes fuel in order can not too high because of fuel concentration when the engine starts, appear starting difficulties, start stifled machine and phenomenon such as blasting, improved the stability that the engine started.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

Drawings

FIG. 1 is a schematic diagram of a prior art fuel delivery system;

fig. 2 is a schematic structural diagram of a fuel supply system according to an embodiment of the present invention;

FIG. 3 is a schematic view of the fuel delivery system of FIG. 2 with the choke valve half open;

fig. 4 is a schematic structural view of a choke shaft according to an embodiment of the present invention;

FIG. 5 is a bottom view of the structure of FIG. 4;

FIG. 6 is a schematic view of the inverted structure of FIG. 4;

fig. 7 is a schematic structural view of a choke rocker arm according to an embodiment of the present invention;

FIG. 8 is a schematic view of the structure of FIG. 7 in another direction;

fig. 9 is a schematic view of a shaft structure according to an embodiment of the present invention;

fig. 10 is a schematic view of a shifting fork according to an embodiment of the present invention.

Wherein the reference numerals

Prior Art

10 choke shaft

20 choke flap

30 shifting fork

The utility model discloses

1 main body

2 Shifting fork

21 handle

22 mounting body

23 stop pin

3 choke shaft

31 choke valve rocker arm

311 Rocker arm body

312 mounting hole

313 limiting groove

314 shifting fork chute

32 torsion spring

33 limiting pin

34 axle body

341 axle body

342 door sheet mounting groove

343 screw hole

344 spacer pin mounting hole

345 split retainer ring mounting groove

35 split retainer ring

4 choke flap

5 screw

Detailed Description

The following describes the structural and operational principles of the present invention in detail with reference to the accompanying drawings:

referring to fig. 2 and 3, fig. 2 is a schematic structural diagram of a fuel supply system according to an embodiment of the present invention, and fig. 3 is a schematic half-open view of a choke valve of the fuel supply system of fig. 2. The utility model discloses a fuel supply system, include body 1 and install choke valve and shift fork 2 on the body 1, shift fork 2 with the choke valve is connected. The choke valve is a semi-automatic choke valve, and when the engine is started by closing the choke valve sheet 4, the choke valve sheet 4 is automatically opened to a certain opening degree. In the starting process, the semi-automatic choke valve is acted by the suction force of the engine, the original fully-closed choke valve sheet 4 (shown in figure 2) is automatically opened by a certain angle (shown in figure 3), so that more air is sucked into the mixing chamber to be mixed with fuel, and the fuel is diluted, so that the phenomena of difficult starting, stuffer starting, blasting and the like caused by overhigh fuel concentration can be avoided when the engine is started. The composition, structure, mutual position relation, connection relation and function of other parts of the fuel supply system are mature prior art, so that the detailed description is omitted, and the detailed description is only given below for the semi-automatic choke valve of the utility model.

Referring to fig. 4-6, fig. 4 is a schematic structural view of a choke shaft 3 according to an embodiment of the present invention, fig. 5 is a schematic structural view of the choke shaft in a bottom direction of fig. 4, and fig. 6 is a schematic structural view of the choke shaft in an inverted direction of fig. 4. The utility model discloses a semi-automatic choke valve includes choke shaft 3 and installs choke flap 4 on the choke shaft 3, choke shaft 3 includes axis body 34, choke rocking arm 31 and torsional spring 32, the one end of axis body 34 is installed on the choke rocking arm 31, axis body 34 is close to choke rocking arm 31 department installs spacer pin 33, torsional spring 32's both ends difference joint is in choke rocking arm 31 with on the spacer pin 33, be provided with flap mounting groove 342 on the axis body 34, choke flap 4 is installed in flap mounting groove 342.

Referring to fig. 7 and 8, fig. 7 is a schematic structural view of a choke rocker arm according to an embodiment of the present invention, and fig. 8 is a schematic structural view in another direction of fig. 7. In this embodiment, the choke rocker arm 31 includes a rocker arm main body 311, a mounting hole 312 is disposed in the middle of the rocker arm main body 311, a limiting groove 313 is disposed on the rocker arm main body 311, the limiting groove 313 is located on one side of the mounting hole 312, and one end of the limiting pin 33 is located in the limiting groove 313. The limiting groove 313 is preferably an arc-shaped groove, and the arc center line of the arc-shaped groove is arranged coaxially with the axis of the mounting hole 312. The rocker arm main body 311 is further provided with a shifting fork sliding groove 314, and the shifting fork sliding groove 314 is located on one side of the limiting groove 313 and penetrates through the rocker arm main body 311.

Referring to fig. 9, fig. 9 is a schematic view of a shaft body structure according to an embodiment of the present invention. The top end of the shaft body 341 of the shaft body 34 is provided with a split washer mounting groove 345, and the shaft body 34 is mounted in the mounting hole 312 and is clamped and connected by a split washer 35. The shaft body 341 is provided with a threaded hole 343 corresponding to the vane mounting groove 342, and the choke vane 4 is tightly mounted in the vane mounting groove 342 by a screw 5. The two threaded holes 343 are vertically and symmetrically arranged, and the axes of the two threaded holes 343 are parallel to each other and are located in the same plane as the axis of the shaft 34. The flap mounting groove 342 is located at one side of the shaft body 341 and is disposed near a lower portion of the shaft body 341. The stopper pin 33 is press-fitted into the stopper pin mounting hole 344.

Referring to fig. 10, fig. 10 is a schematic diagram of a shifting fork according to an embodiment of the present invention. The fork 2 includes a mounting body 22, and a handle 21 and a stopper pin 23 integrally connected to the mounting body 22. The shifting fork 2 is arranged on the body 1, and the stop pin 23 on the shifting fork 2 is arranged in the shifting fork sliding groove 314 of the choke valve rocker arm 31. The handle 21 of the shifting fork 2 is rotated, and the choke valve shaft 3 is driven to rotate through the stop pin 23, so that the full opening and full closing of the choke valve piece 4 are switched. The shifting fork 2 can be operated manually usually, and the opening and closing of the choke valve are adjusted by controlling the choke valve shaft 3 from full opening to full closing, and when the shifting fork 2 is not moved, the choke valve shaft 3 is not moved. The utility model discloses a semi-automatic choke valve can be under the circumstances of full cut-off choke valve piece 4, during the start-up engine, need not rotate shift fork 2, leans on the suction effect of engine to open certain angle with choke valve piece 4 is automatic to improve the startability and the stability of engine.

The choke shaft 3 of the embodiment of the present invention is installed on the installation hole 312 of the choke rocker arm 31, and the split washer 35 is clamped on the split washer installation groove 345 of the choke shaft 3; the limit pin 33 is pressed on the limit pin mounting hole 344 on the shaft body 34; the torsion spring 32 is sleeved on the choke shaft 3, one end of the torsion spring is clamped on the choke rocker 31, and the other end of the torsion spring is clamped on the limiting pin 33; the wind-resistant door leaf 4 is arranged on the door leaf mounting groove 342 and is locked by the screw 5.

The utility model discloses can be when starting under the condition that the engine closes choke flap 4, open certain aperture with the choke valve automatically. The choke valve piece 4 receives the effect of engine suction in the start-up process, engine suction is inhaled choke valve piece 4 inwards, choke valve piece 4 of former full cut-off drives axis body 34, the spacer pin 33 of pressure equipment on axis body 34 and the split ring 35 of card on axis body 34 rotate together, open certain angle by oneself, more air inhales the mixing chamber and mixes with fuel, dilute fuel so that can not appear starting difficulty because of fuel concentration is too high when the engine starts, phenomenon such as start stifle machine and blasting, improve the stability that the engine started.

Naturally, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and it is intended that all such changes and modifications be considered as within the scope of the appended claims.

Claims (10)

1. The utility model provides a semi-automatic choke valve, installs on fuel supply system's body, a serial communication port, semi-automatic choke valve includes the choke valve axle and installs the epaxial choke flap of choke valve, the choke valve axle includes axis body, choke valve rocking arm and torsional spring, the one end of axis body is installed on the choke valve rocking arm, the axis body is close to choke valve rocking arm department installs the spacer pin, the both ends difference joint of torsional spring is in the choke valve rocking arm with on the spacer pin, be provided with the flap mounting groove on the axis body, the choke flap is installed in the flap mounting groove.

2. The semi-automatic choke of claim 1, wherein the choke rocker arm includes a rocker arm body, a mounting hole is formed in a middle portion of the rocker arm body, a limiting groove is formed in the rocker arm body, the limiting groove is located on one side of the mounting hole, and one end of the limiting pin is located in the limiting groove.

3. The semi-automatic choke of claim 2, wherein the limiting groove is an arc-shaped groove, and the arc center line of the arc-shaped groove is coaxial with the axis of the mounting hole.

4. The semi-automatic choke valve according to claim 2 or 3, characterized in that a shifting fork sliding groove is further provided on the rocker arm main body, the shifting fork sliding groove is located at one side of the limiting groove and penetrates through the rocker arm main body.

5. The semi-automatic choke of claim 4, wherein a split washer mounting groove is provided at a top end of the shaft body, and the shaft body is mounted in the mounting hole and snap-coupled by the split washer.

6. The semi-automatic choke of claim 4, wherein a threaded hole is provided in the shaft body corresponding to the flap mounting groove, and the choke flap is mounted on the shaft body by locking with a screw.

7. The semi-automatic choke valve according to claim 6, wherein the threaded holes are two in a vertically symmetrical arrangement, and the axes of the two threaded holes are parallel to each other and in the same plane as the axis of the shaft body.

8. The semi-automatic choke of claim 7, wherein the flap mounting groove is located at one side of the shaft body and is located near a lower portion of the shaft body.

9. The semi-automatic choke of claim 4, wherein the limit pin is press-fitted into the limit pin mounting hole of the shaft body.

10. A fuel supply system comprising a body and a choke valve and a fork mounted on the body, the fork being connected to the choke valve, characterised in that the choke valve is a semi-automatic choke valve according to any one of claims 1 to 9.

Images