CN210343527U - Fuel supply system and semi-automatic choke valve thereof - Google Patents
Fuel supply system and semi-automatic choke valve thereof Download PDFInfo
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- CN210343527U CN210343527U CN201920775594.1U CN201920775594U CN210343527U CN 210343527 U CN210343527 U CN 210343527U CN 201920775594 U CN201920775594 U CN 201920775594U CN 210343527 U CN210343527 U CN 210343527U
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- choke valve
- choke
- shaft
- semi
- rocker arm
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Abstract
A fuel oil supply system and semi-automatic choke valve thereof, the fuel oil supply system comprises a body, a choke valve and a shifting fork, wherein the choke valve and the shifting fork are arranged on the body; the choke valve rocker arm is arranged on the shaft sleeve, and a limit groove is arranged on the choke valve rocker arm; the shaft body is arranged in the shaft sleeve, the top end of the shaft body is provided with a limiting boss matched with the limiting groove, and the limiting boss is abutted against the limiting groove; the torsion spring is arranged on the shaft body, one end of the torsion spring is clamped on the limiting boss, and the other end of the torsion spring abuts against the limiting groove; the choke valve rocker arm rotates to drive the shaft body to rotate synchronously. The utility model discloses can open certain aperture with the choke valve automatically when the engine starts, improve the stability of starting.
Description
Technical Field
The utility model relates to a fuel feed system, especially a can open the fuel feed system of certain aperture with the choke valve automatically when the engine starts and semi-automatic choke valve thereof.
Background
Referring to fig. 1, fig. 1 is a schematic diagram of a prior art fuel supply system. As shown in fig. 1, the choke shaft 30 installed on the body 10 is a whole, the choke flap 40 is installed on the choke shaft 30, and the shift fork 20 drives the choke shaft 30 to rotate so as to realize full opening and full closing of the choke flap 40. When the choke flap 40 is fully closed, under the condition that the shifting fork is not moved, the choke flap 40 cannot be opened by oneself, the air inlet amount is less, the fuel concentration in the mixing chamber is higher at the moment, and because no more air is diluted, the bad phenomena such as stuffiness and blasting are easy to occur when the engine is started, the starting difficulty and the like occur, 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 problem of prior art, provide a can open the fuel feeding system of certain aperture with the choke valve automatically when the engine starts and semi-automatic choke valve thereof.
In order to achieve the purpose, the utility model provides a semi-automatic choke valve, which is arranged on a body of a fuel supply system, wherein the semi-automatic choke valve comprises a choke valve shaft and a choke valve sheet arranged on the choke valve shaft, the choke valve shaft comprises a shaft body, a shaft sleeve, a choke valve rocker arm and a torsion spring, and the shaft sleeve is arranged on the body; the choke valve rocker arm is arranged on the shaft sleeve, and a limit groove is formed in the choke valve rocker arm; the shaft body is arranged in the shaft sleeve, a limiting boss matched with the limiting groove is arranged at the top end of the shaft body, and the limiting boss abuts against the limiting groove; the torsion spring is arranged on the shaft body, one end of the torsion spring is clamped on the limiting boss, and the other end of the torsion spring abuts against the limiting groove; the choke valve rocker arm rotates to drive the shaft body to rotate synchronously.
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, the limiting groove is formed in the rocker arm main body, the limiting groove is located in one side of the mounting hole and communicated with the mounting hole, and the limiting groove is provided with a first limiting surface and a second limiting surface which are arranged oppositely.
In the semi-automatic choke valve, an intersection line of the first limiting surface and the second limiting surface and an axis of the mounting hole are located on the same straight line.
In the semi-automatic choke valve, the rocker arm main body is further provided with a stop pin sliding groove, and the stop pin sliding groove is located on one side of the limiting groove and penetrates through the rocker arm main body.
The semi-automatic choke valve comprises a shaft body, wherein a choke valve sheet mounting groove is formed in the shaft body, the choke valve sheet mounting groove is a through groove penetrating through the shaft body, and the choke valve sheet is inserted into the choke valve sheet mounting groove.
In the semi-automatic choke valve, the center line of the through groove is located on the axis of the shaft body.
In the semi-automatic choke valve, the choke flap mounting groove is arranged close to the lower part of the shaft body.
In the semi-automatic choke valve, the limiting boss is located at the top end of the shaft body and extends outwards along the direction perpendicular to the axis of the shaft body, and the limiting boss is provided with a boss first limiting surface and a boss second limiting surface which are arranged oppositely.
In the semi-automatic choke valve, an intersection line of the first boss limiting surface and the second boss limiting surface is located on the same straight line with the axis 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 utility model has the beneficial effects that:
the utility model discloses can open certain aperture with the choke valve automatically when the engine starts, mix with fuel in more air suction mixing chambers, dilute fuel in order can not too high because of fuel concentration when the engine starts, appear starting difficulties, start phenomena such as vexed machine and 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 view of a fuel supply system according to an embodiment of the present invention (fully closed choke valve);
FIG. 3 is a schematic view of the choke valve of FIG. 2 shown in an open position;
FIG. 4 is a cross-sectional view of the choke shaft of FIG. 2;
fig. 5 is a schematic structural view of a choke rocker arm according to an embodiment of the present invention;
fig. 6 is a schematic view of a shaft sleeve structure according to an embodiment of the present invention;
fig. 7 is a schematic view of a shaft structure according to an embodiment of the present invention;
fig. 8 is a schematic structural view of a choke plate according to an embodiment of the present invention;
fig. 9 is a schematic view of a shifting fork according to an embodiment of the present invention.
Wherein the reference numerals
Prior Art
10 main body
20 shifting fork
30 choke shaft
40 choke flap
The utility model discloses
1 main body
2 Shifting fork
21 handle
22 fork body
23 stop pin
3 choke shaft
31 choke valve rocker arm
311 Rocker arm body
312 mounting hole
313 limiting groove
3131 first limit surface
3132 second limit surface
314 stop pin chute
32 torsion spring
33 shaft sleeve
331 axle sleeve main body
332 axle sleeve hole
34 axle body
341 axle body
342 choke flap mounting groove
343 spacing boss
3431 first limit surface of boss
3432 second limit surface of boss
4 choke flap
Detailed Description
The invention will be described in detail with reference to the following drawings, which are provided for illustration purposes and the like:
referring to fig. 2 to 3, fig. 2 is a schematic structural view (choke valve fully closed) of a fuel supply system according to an embodiment of the present invention, and fig. 3 is a schematic structural view of the choke valve of fig. 2 when the choke valve is opened at a certain angle. 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, and this choke valve is semi-automatic choke valve, can close when choke flap 4 starts in the engine, opens certain aperture with choke flap 4 is automatic. 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, fig. 4 is a schematic sectional view of the choke shaft of fig. 2. The utility model discloses a semi-automatic choke valve, including choke shaft 3 and installing choke flap 4 on choke shaft 3, choke shaft 3 includes axis body 34, axle sleeve 33, choke rocking arm 31 and torsional spring 32, axle sleeve 33 is installed on body 1; the choke valve rocker arm 31 is mounted on the shaft sleeve 33, and a limit groove 313 is formed in the choke valve rocker arm 31; the shaft body 34 is installed in the shaft sleeve 33, a limit boss 343 matched with the limit groove 313 is arranged at the top end of the shaft body 34, and the limit boss 343 abuts against the limit groove 313; the torsion spring 32 is mounted on the shaft body 34, one end of the torsion spring 32 is clamped on the limit boss 343, and the other end of the torsion spring 32 abuts against the limit groove 313; the choke rocker arm 31 rotates to drive the shaft body 34 to rotate synchronously.
Referring to fig. 5, fig. 5 is a schematic structural view of a choke rocker arm according to an embodiment of the present invention. The choke rocker arm 31 includes a rocker arm body 311, a mounting hole 312 is provided in the middle of the rocker arm body 311, a limiting groove 313 is provided on the rocker arm body 311, the limiting groove 313 is located on one side of the mounting hole 312 and is communicated with the mounting hole 312, and the limiting groove 313 has a first limiting surface 3131 and a second limiting surface 3132 which are oppositely disposed, respectively. Preferably, an intersection line of the first and second limiting surfaces 3131 and 3132 is located on the same straight line with an axis of the mounting hole 312. The rocker arm main body 311 is further provided with a stop pin sliding groove 314, and the stop pin 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. 6, fig. 6 is a schematic view of a shaft sleeve structure according to an embodiment of the present invention. The shaft sleeve 33 includes a shaft sleeve main body 331 and a shaft sleeve hole 332 disposed on the shaft sleeve main body 331, the shaft sleeve hole 332 is a through hole, and the shaft sleeve hole 332 is disposed coaxially with the shaft sleeve main body 331.
Referring to fig. 7 and 8, fig. 7 is a schematic view of an axis structure according to an embodiment of the present invention, and fig. 8 is a schematic view of a choke plate according to an embodiment of the present invention. The shaft body 34 includes a shaft main body 341, and a choke flap mounting groove 342 and a stopper boss 343 provided on the shaft main body 341. The limiting boss 343 of this embodiment is located at the top end of the shaft main body 341 and extends outward along the direction perpendicular to the axis of the shaft body 34, and the limiting boss 343 has a boss first limiting surface 3431 and a boss second limiting surface 3432 which are disposed opposite to each other. Preferably, an intersection line of the boss first limiting surface 3431 and the boss second limiting surface 3432 is located on the same straight line with the axis of the shaft body 34. The shaft body 34 is provided with a choke flap mounting groove 342, the choke flap mounting groove 342 is a through groove penetrating through the shaft body 341, the choke flap 4 is inserted into the choke flap mounting groove 342, and preferably, the center line of the through groove is located on the axis of the shaft body 34. The choke flap installation groove 342 is preferably provided near a lower portion of the shaft main body 341.
Referring to fig. 9, fig. 9 is a schematic diagram of a shifting fork according to an embodiment of the present invention. The fork 2 includes a fork body 22, and a handle 21 and a stopper pin 23 integrally connected to the fork body 22. The shift fork main body 22 is mounted on the body 1, and the stop pin 23 of the shift fork 2 is mounted in the stop pin sliding groove 314 of the choke rocker arm 31. The handle 21 of the shifting fork 2 is rotated, and the choke valve rocker arm 31 is driven through the stop pin 23 so as to drive the choke valve shaft 3 to rotate, so that the full opening and full closing of the choke valve piece 4 are switched. The fork 2 is usually operated manually, and the opening and closing of the choke valve are adjusted by controlling the choke valve shaft 3 from full opening to full closing. The utility model discloses a semi-automatic choke valve can be under the condition of 4 full cuts-offs of choke valve piece, during the start-up engine, need not rotate shift fork 2, lean 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 shaft sleeve 33 is sleeved on the mounting hole 312 of the choke valve rocker arm 31, and the shaft sleeve main body 331 is pressed on the body 1; the torsion spring 32 is sleeved on the shaft main body 341 of the choke shaft 3, and one end of the torsion spring 32 is hooked on the limit boss 343 of the shaft body 34; then, the shaft body 34 sleeved with the torsion spring 32 is sleeved in the shaft sleeve hole 332 of the shaft sleeve 33, at the moment, under the action force of the torsion spring 32, the first boss limiting surface 3431 of the shaft body 34 is always abutted against the first limiting surface 3131 of the choke valve rocker arm 31, and the shaft body 34 rotates along with the rotation of the choke valve rocker arm 31; the choke flap 4 is inserted into the choke flap mounting groove 342 of the shaft body 34, and the rotation from full opening to full closing of the choke flap 4 is realized along with the rotation of the shaft body 34; the shift fork 2 is installed on the body 1, and the stop pin 23 on the shift fork 2 is placed in the stop pin sliding groove 314 of the choke rocker arm 31. The handle 21 of the shifting fork 2 is rotated, the choke valve rocker arm 31 is driven to rotate through the stop pin 23, the shaft body 34 is driven to rotate, and therefore the choke valve sheet 4 rotates along with the choke valve, and full opening and full closing of the choke valve are switched. Since the shaft body 34 and the choke plate 4 are independent of each other in this structure and can rotate freely, the shaft body 34 abuts against the first stopper surface 3131 of the choke rocker arm 31 by the torsion spring 32. When the engine is started, suction is formed in the engine cavity, the choke flap 4 in the fully closed state can be automatically opened at a certain angle under the action of the suction force, 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, starting blasting and the like caused by overhigh fuel concentration can be avoided when the engine is started.
The utility model discloses in the starting process, receive the effect of engine suction, certain angle is opened by oneself to the choke flap of former full cut-off, makes more air suction mix indoor and fuel mixture, dilutes fuel, can not appear starting the difficulty, starting phenomenons such as blasting because of fuel concentration is too high when the engine starts, has improved 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. A semi-automatic choke valve is installed on a body of a fuel supply system and is characterized in that the semi-automatic choke valve comprises a choke valve shaft and a choke valve sheet installed on the choke valve shaft, the choke valve shaft comprises a shaft body, a shaft sleeve, a choke valve rocker arm and a torsion spring, and the shaft sleeve is installed on the body; the choke valve rocker arm is arranged on the shaft sleeve, and a limit groove is formed in the choke valve rocker arm; the shaft body is arranged in the shaft sleeve, a limiting boss matched with the limiting groove is arranged at the top end of the shaft body, and the limiting boss abuts against the limiting groove; the torsion spring is arranged on the shaft body, one end of the torsion spring is clamped on the limiting boss, and the other end of the torsion spring abuts against the limiting groove; the choke valve rocker arm rotates to drive the shaft body to rotate synchronously.
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, the limiting groove is formed in the rocker arm body, the limiting groove is located on one side of the mounting hole and is communicated with the mounting hole, and the limiting groove has a first limiting surface and a second limiting surface which are oppositely arranged.
3. The semi-automatic choke of claim 2, wherein the intersection of the first stop surface and the second stop surface is aligned with the axis of the mounting hole.
4. The semi-automatic choke valve according to claim 2 or 3, characterized in that a stop pin sliding groove is further provided on the rocker arm main body, the stop pin 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 choke plate mounting slot is provided on the shaft body, the choke plate mounting slot being a through slot extending through the shaft body, the choke plate being inserted in the choke plate mounting slot.
6. The semi-automatic choke of claim 5, wherein a centerline of the through slot is located on an axis of the shaft body.
7. The semi-automatic choke of claim 6, wherein the choke flap mounting slot is disposed proximate a lower portion of the shaft body.
8. The semi-automatic choke of claim 5, wherein the stop boss is located at the top end of the shaft body and extends outwardly in a direction perpendicular to the axis of the shaft body, the stop boss having a first stop surface and a second stop surface opposite the first stop surface.
9. The semi-automatic choke of claim 4, wherein the intersection of the first stop surface of the boss and the second stop surface of the boss is aligned with the axis of the shaft.
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920775594.1U CN210343527U (en) | 2019-05-27 | 2019-05-27 | Fuel supply system and semi-automatic choke valve thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920775594.1U CN210343527U (en) | 2019-05-27 | 2019-05-27 | Fuel supply system and semi-automatic choke valve thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210343527U true CN210343527U (en) | 2020-04-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920775594.1U Active CN210343527U (en) | 2019-05-27 | 2019-05-27 | Fuel supply system and semi-automatic choke valve thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210343527U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111997788A (en) * | 2019-05-27 | 2020-11-27 | 华益机电有限公司 | Fuel supply system and semi-automatic choke valve thereof |
-
2019
- 2019-05-27 CN CN201920775594.1U patent/CN210343527U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111997788A (en) * | 2019-05-27 | 2020-11-27 | 华益机电有限公司 | Fuel supply system and semi-automatic choke valve thereof |
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