CN111692016A

CN111692016A - Fuel supply system

Info

Publication number: CN111692016A
Application number: CN201910188989.6A
Authority: CN
Inventors: 徐小平; 钱光明; 叶秀峰
Original assignee: Huayi Electromechanical Co ltd
Current assignee: Huayi Electromechanical Co ltd
Priority date: 2019-03-13
Filing date: 2019-03-13
Publication date: 2020-09-22
Anticipated expiration: 2039-03-13
Also published as: CN111692016B

Abstract

A fuel supply system comprises a body, an air throttle shaft, a choke shaft and a shifting fork, wherein a membrane type oil switch and a flameout switch are installed on the body corresponding to the shifting fork, the shifting fork comprises a main body, a handle arranged on the main body, an installation platform, a choke dial and a switch dial, the main body is connected with the body through a shifting fork positioning rod, the choke dial is arranged corresponding to the choke shaft, an air throttle control arm is arranged on the installation platform corresponding to the air throttle shaft, the switch dial is arranged corresponding to the membrane type oil switch and the flameout switch, the shifting fork respectively has a starting position, an operating position, an idling position and a flameout position relative to the body, a starting gear hole, an operating gear hole, an idling gear hole and a flameout gear hole are respectively arranged on the main body corresponding to the starting gear hole, the operating position, the idling position and the flameout position, and a starting gear hole, an idling gear hole and a flameout gear hole are respectively arranged on the body corresponding to the starting gear hole, And the operation gear hole, the idling gear hole and the flameout gear hole are provided with limiting structures.

Description

Fuel supply system

Technical Field

The invention relates to a fuel supply system, in particular to a four-position integrated fuel supply system.

Background

In the fuel supply system in the prior art, the throttle shaft, the choke shaft, the membrane type oil switch and the flameout switch are respectively operated and controlled, the structure is relatively complex, the operation is complex, the convenience cannot meet the use requirement, and meanwhile, the reliability of the fuel supply system is not improved.

Disclosure of Invention

The invention aims to solve the technical problem of providing a four-in-one fuel supply system aiming at the defects in the prior art.

In order to achieve the above object, the present invention provides a fuel supply system, which includes a main body, and a throttle shaft, a choke shaft and a shift fork mounted on the main body, wherein the main body is mounted with a diaphragm oil switch and a choke switch corresponding to the shift fork, the shift fork includes a main body, and a handle, a mounting table, a choke dial and a switch dial arranged on the main body, the main body is connected to the main body through a shift fork positioning rod, the choke dial is arranged corresponding to the choke shaft, the mounting table is provided with a throttle lever corresponding to the throttle shaft, the switch dial is arranged corresponding to the diaphragm oil switch and the choke switch, the shift fork has a start position, an operating position, an idle position and a choke position relative to the main body, the main body has a start position, an operating position, an idle position and a choke position corresponding to the start position, the operating position, The idling position and the flameout position are respectively provided with a starting gear hole, an operating gear hole, an idling gear hole and a flameout gear hole, and the body is provided with a limiting structure corresponding to the starting gear hole, the operating gear hole, the idling gear hole and the flameout gear hole.

The fuel supply system is characterized in that the main body is a cylindrical structural part with a rotation center, the handle is arranged on one side of the main body and extends above the main body, the switch shifting piece is located at the bottom of the main body and close to one side of the handle, the mounting table is located on the upper portion of the main body and located on one side opposite to the handle, the choke valve shifting piece is arranged on the upper portion of the main body and located between the mounting table and the handle, the bottom of the main body is provided with a gear boss relative to the switch shifting piece, and the starting gear hole, the running gear hole, the idling gear hole and the flameout gear hole are sequentially arranged on the bottom surface of the gear boss.

In the above fuel supply system, the limiting structure includes a limiting hole, a spring and a limiting ball, the limiting hole, the spring and the limiting ball are disposed on the body, the spring and the limiting ball are both disposed in the limiting hole, two ends of the spring are respectively abutted against the inner wall of the limiting hole and the limiting ball, and the limiting ball has an ejecting position and a pressing position relative to the limiting hole.

The above fuel supply system, wherein the diaphragm type oil switch is provided corresponding to the oil inlet hole of the body, and the diaphragm type oil switch includes:

a diaphragm upper cover mounted on the body;

the diaphragm pressing block is arranged on the diaphragm upper cover and respectively provided with a pressing position and a resetting position relative to the diaphragm upper cover;

the diaphragm is arranged at the bottom end of the upper cover relative to the diaphragm pressing block and is abutted against the diaphragm pressing block through a diaphragm nut; and

and the oil needle is arranged on the diaphragm and is positioned on the opposite side of the diaphragm nut, and the oil needle has an open position and a closed position relative to the oil inlet hole respectively.

In the above fuel supply system, the oil needle is further provided with an oil needle spring, and the oil needle spring abuts against the outer walls of the membrane and the oil inlet hole respectively.

In the above fuel supply system, the diaphragm nut is further provided with a diaphragm spring, and the diaphragm spring abuts against the diaphragm and the diaphragm pressing block respectively.

In the fuel supply system, the throttle shaft includes a throttle shaft body, and a throttle rocker arm and a throttle stopper pin that are provided on the throttle shaft body, the throttle shaft body is provided with the throttle, and the throttle control arm abuts against the throttle stopper pin.

In the above fuel supply system, the throttle lever arm is further provided with a lever arm torsion spring.

The choke valve shaft comprises a choke valve shaft body, a choke valve rocker arm and a choke valve stop pin, the choke valve rocker arm and the choke valve stop pin are arranged on the choke valve shaft body, and the choke valve plectrum is abutted to the choke valve stop pin.

In the fuel supply system, the top of the shifting fork positioning rod is provided with the loosening nut.

The invention has the technical effects that:

the invention can realize a four-position component of a one-key control fuel supply system: the throttle shaft, the choke shaft, the membrane type oil switch and the flameout switch can be operated by one key, are simple and convenient, can be adjusted to an idling operation state before flameout, and are safe and reliable in performance and convenient to use.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 9 (with the oil switch closed);

FIG. 3 is a cross-sectional view A-A of FIG. 9 (oil switch open);

FIG. 4 is a schematic view of a fork assembly according to an embodiment of the present invention;

FIG. 5 is a schematic view of a throttle shaft according to an embodiment of the present invention;

FIG. 6 is a schematic view of a choke shaft according to an embodiment of the present invention;

FIG. 7 is a schematic view of a body limiting structure according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a diaphragm type oil switch according to an embodiment of the present invention;

FIG. 9 is a top view of an embodiment of the present invention (in an extinguished position);

FIG. 10 is a top view (actuated position) of an embodiment of the present invention;

FIG. 11 is a top view (operational position) of an embodiment of the present invention;

FIG. 12 is a top view (idle position) of an embodiment of the present invention.

Wherein the reference numerals

1 main body

11 position limiting structure

2 throttle shaft

21 throttle shaft body

22 throttle valve rocker arm

23 throttle stop pin

3 choke shaft

31 choke shaft body

32 choke valve rocker arm

33 choke stop pin

4 choke torsion spring

5-diaphragm type oil switch

51 oil needle

52 oil needle spring

53 diaphragm

54 diaphragm nut

55 diaphragm spring

56 diaphragm pressing block

57 diaphragm upper cover

6 flameout switch

7 flame-out switch support

8 shifting fork

81 main body

811 handle

812 mounting table

813 choke flap

814 switch shifting piece

815 shift boss

816 flameout shift hole

817 Idle gear hole

818 running gear hole

819 Start gear hole

82 throttle control arm

83 control arm torsion spring

84 shim

85 split retainer ring

9 shifting fork positioning rod

10 loosening nut

I starting position

II operating position

III Idle position

IV extinguishing position

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. 1 to 3, fig. 1 is a schematic perspective view illustrating an embodiment of the present invention, fig. 2 is a sectional view taken along line a-a of fig. 9 (oil switch closed), and fig. 3 is a sectional view taken along line a-a of fig. 9 (oil switch open). The fuel supply system comprises a body 1, a throttle shaft 2, a choke shaft 3 and a shifting fork 8, wherein the throttle shaft 2, the choke shaft 3 and the shifting fork 8 are arranged on the body 1, a diaphragm type oil switch 5 and a flameout switch 6 are arranged on the body 1 corresponding to the shifting fork 8, the flameout switch 6 is arranged on the body 1 through a flameout switch bracket 7, the shifting fork 8 comprises a main body 81, a handle 811 arranged on the main body 81, a mounting platform 812, a choke dial 813 and a switch dial 814, the main body 81 is connected with the body 1 through a shifting fork positioning rod 9, the choke dial 813 is arranged corresponding to the choke shaft 3, a throttle control arm 82 is arranged on the mounting platform 812 corresponding to the throttle shaft 2, the switch dial 814 is arranged corresponding to the diaphragm type oil switch 5 and the flameout switch 6, the shifting fork 8 respectively has a starting position I, a starting position II and a starting position II relative, The main body 81 is provided with a starting gear hole 819, an operating gear hole 818, an idling gear hole 817 and a flameout gear hole 816 corresponding to the starting position I, the operating position II, the idling position III and the flameout position IV respectively, and the body 1 is provided with a limiting structure 11 corresponding to the starting gear hole 819, the operating gear hole 818, the idling gear hole 817 and the flameout gear hole 816. An included angle D, B and an included angle C are respectively formed between the starting position i, the operating position ii, the idle position iii and the flameout position iv, or between the starting gear hole 819, the operating gear hole 818, the idle gear hole 817 and the flameout gear hole 816 (see fig. 9).

Referring to fig. 4, fig. 4 is a schematic structural view of a fork assembly according to an embodiment of the present invention. In this embodiment, the main body 81 is a cylindrical structure having a rotation center, the handle 811 is disposed on one side of the main body 81 and extends along an upper portion of the main body 81, the switch dial 814 is disposed at a bottom of the main body 81 and adjacent to one side of the handle 811, the mounting base 812 is disposed at an upper portion of the main body 81 and opposite to the handle 811, the choke dial 813 is disposed at an upper portion of the main body 81 and between the mounting base 812 and the handle 811, the bottom of the main body 81 is provided with a shift boss 815 opposite to the switch dial 814, and the start shift hole 819, the running shift hole 818, the idle shift hole 817, and the extinction shift hole 816 are sequentially disposed on a bottom surface of the shift boss 815. The top of the shifting fork positioning rod 9 is provided with a loosening nut 10.

Referring to fig. 7, fig. 7 is a schematic view of a limiting structure of the body according to an embodiment of the invention. The limiting structure 11 comprises a limiting hole, a spring and a limiting ball which are arranged on the body 1, the spring and the limiting ball are both installed in the limiting hole, two ends of the spring are respectively abutted against the inner wall of the limiting hole and the limiting ball, and the limiting ball is provided with an ejection position and a pressing-in position relative to the limiting hole. When the corresponding gear hole of the shifting fork 8 rotates to the position of the limiting hole, the limiting ball is ejected out under the action of the spring to enter the gear hole, and the shifting fork 8 is limited at the corresponding gear position. When the state of the engine needs to be adjusted, the shifting fork 8 is rotated to press the limiting ball into the limiting hole, the shifting fork 8 continues to rotate until the position of another gear hole corresponding to the corresponding state of the engine is reached, and the limiting ball enters the corresponding gear hole again to limit the shifting fork 8.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a diaphragm type oil switch according to an embodiment of the present invention. The membrane type oil switch 5 of the present embodiment corresponds to the oil inlet hole of the body 1, and the membrane type oil switch 5 includes: a membrane upper cover 57 mounted on the body 1; diaphragm pressing blocks 56 mounted on the diaphragm upper cover 57 and having a pressing position and a resetting position with respect to the diaphragm upper cover 57, respectively; a diaphragm 53 provided at the bottom end of the upper cover with respect to the diaphragm pressing block 56, and abutted against the diaphragm pressing block 56 through a diaphragm nut 54; and an oil needle 51 installed on the diaphragm 53 at a side opposite to the diaphragm nut 54, the oil needle 51 having an open position and a closed position with respect to the oil inlet hole, respectively. The oil needle 51 is further provided with an oil needle spring 52, and the oil needle spring 52 is respectively abutted against the diaphragm 53 and the outer wall of the oil inlet hole. The diaphragm nut 54 is further provided with a diaphragm spring 55, and the diaphragm spring 55 abuts against the diaphragm 53 and the diaphragm pressing block 56 respectively. When the switch shifting piece 814 on the shifting fork 8 acts on the diaphragm pressing block 56, the diaphragm pressing block 56 is stressed to move downwards to compress the diaphragm spring 55, the strong pressure of the diaphragm spring 55 is transmitted to the diaphragm 53, the diaphragm 53 drives the oil needle 51 to move downwards until the oil needle 51 is pressed against the oil inlet of the body 1, and at the moment, the oil inlet is blocked, and the gasoline oil way is cut off. When the diaphragm pressing block 56 is not stressed, the force of the diaphragm spring 55 acting on the diaphragm 53 disappears, the diaphragm 53 is restored to the original state, the oil needle 51 is pushed upwards under the action of the oil needle spring 52, the oil passage is opened, and at the moment, gasoline can enter the oil storage chamber of the body 1 from the oil passage for the engine to run.

Referring to fig. 5, fig. 5 is a schematic view of a throttle shaft according to an embodiment of the present invention. In the present embodiment, the throttle shaft 2 includes a throttle shaft body 21, and a throttle rocker arm 22 and a throttle bar pin 23 provided on the throttle shaft body 21, the throttle shaft body 21 is provided with a throttle, and the throttle control arm 82 abuts against the throttle bar pin 23. The throttle lever arm 82 is also provided with a lever arm torsion spring 83, and the lever arm torsion spring 83 is provided corresponding to the throttle lever arm 82 and is mounted on the mounting platform 812 via a spacer 83 and a circlip 85.

Referring to fig. 6, fig. 6 is a schematic structural view of a choke shaft according to an embodiment of the present invention. The choke shaft 3 comprises a choke shaft body 31, a choke rocker 32 and a choke stop pin 33, wherein the choke rocker 32 and the choke stop pin 33 are arranged on the choke shaft body 31, and the choke plectrum 813 is abutted to the choke stop pin 33.

Referring to fig. 9-12, fig. 9 is a top view of an embodiment of the present invention (deactivated position iv), fig. 10 is a top view of an embodiment of the present invention (activated position i), fig. 11 is a top view of an embodiment of the present invention (operating position ii), and fig. 12 is a top view of an embodiment of the present invention (idle position iii). When the engine is not in operation, the fork 8 is in the extinguishing position iv (fig. 9); when the engine needs to be started, the shifting fork 8 is firstly shifted to a starting position I (shown in a figure 10) so as to start the engine, the shifting fork 8 needs to be shifted to an operating position II (shown in a figure 11) after the engine is started, the normal high-speed operation of the engine is ensured, when the engine needs to be stopped, the shifting fork 8 is firstly shifted to an idling position III (shown in a figure 12) so as to control the engine to be in an idling low-speed operation state, and then the shifting fork 8 is shifted to a flameout position IV so as to stop the operation of the engine, so that the smooth operation of the engine in the flameout process can be ensured. If the engine is directly flamed out in a high-speed running state, the problems of blasting, shaking and the like easily occur to the engine, and the performance of the engine is influenced.

When the engine is shut down (see fig. 9), the switch shifting piece 814 on the shifting fork 8 pushes the flameout switch 6 to a flameout state, and presses the membrane type oil switch 5 downwards to a sealing state, namely the oil needle 51 is located at a closed position to seal the oil inlet hole (see fig. 2); the throttle lever arm 82 on the shift fork 8 shifts the throttle lock pin 23 to turn the throttle shaft 2 to the fully closed state (see fig. 2); at the moment, the choke shaft 3 is not related to the shifting fork 8, and the choke shaft 3 is in a full-open state under the action of the choke torsion spring 4. When the shifting fork 8 is in the flameout position IV, the flameout gear hole 816 is clamped on the limiting structure 11 of the body 1 (see fig. 7), so that the shifting fork 8 is prevented from moving.

When the engine is started (see fig. 10), the shifting fork 8 is not associated with the flameout switch 6, the diaphragm type oil switch 5 and the throttle shaft 2, the flameout switch 6 is restored to the free opening state, the diaphragm type oil switch 5 is in the opening oil supply state under the action of the diaphragm spring 55 and the oil needle spring 52 (see fig. 3), and the throttle shaft 2 is in the full opening position under the action of the engine pull rod; at this time, the choke dial 813 of the shift fork 8 shifts the choke pin 33 to turn the choke shaft 3 to the fully closed state, so as to ensure the start of the engine. When the shifting fork 8 is at the starting position I, the starting gear hole 819 is clamped on the limiting structure 11 of the body 1 to prevent the shifting fork 8 from moving.

When the engine runs (see fig. 11), the shifting fork 8 is not related to the flameout switch 6, the diaphragm type oil switch 5, the throttle shaft 2 and the choke shaft 3 at the moment, the flameout switch 6 is restored to be in a free opening state, the diaphragm type oil switch 5 is in an opening oil supply state (see fig. 3) under the action of the diaphragm spring 55 and the oil needle spring 52, the throttle shaft 2 is in a fully opening position under the action of an engine pull rod, and the choke shaft 3 is in a fully opening state under the action of the choke torsion spring 4, so that the normal operation of the engine is realized. When the shifting fork 8 is in the operating position II, the operating gear hole 818 is clamped on the limiting structure 11 of the body 1, so that the shifting fork 8 is prevented from moving.

When the engine is idling (see fig. 12), the shifting fork 8 is not associated with the flameout switch 6 and the membrane type oil switch 5, the flameout switch 6 is restored to the free opening state, and the membrane type oil switch 5 is in the opening state under the action of the membrane spring 55 and the oil needle spring 52 (see fig. 3); the throttle lever arm 82 on the shift fork 8 acts on the throttle catch pin 23 to place the throttle shaft 2 in the fully closed position, so that the fuel supply system operates at idle speed; at the moment, the choke shaft 3 is not related to the shifting fork 8, and the choke shaft 3 is in a full-open state under the action of the choke torsion spring 4. When the shifting fork 8 is at the starting position I, the starting gear hole 819 is clamped on the limiting structure 11 of the body 1 to prevent the shifting fork 8 from moving.

The invention can realize a four-position component of a one-key control fuel supply system through the shifting fork: throttle shaft, choke shaft, diaphragm type oil switch and flame-out switch. The one-key operation is simple and convenient, the engine can be adjusted to an idling operation state before flameout, the performance is safe and reliable, and the use by consumers is convenient. When the engine needs to be started, the shifting fork is shifted to a starting position, the choke valve is in a fully closed state, and the throttle valve, the membrane type oil switch and the flameout switch are in an open state, so that the starting requirement of the engine can be met; when the engine is started, the shifting fork is shifted to the running position, and at the moment, the throttle valve shaft, the choke valve shaft, the membrane type oil switch and the flameout switch are all in an open state, so that the normal running of the engine is realized; when the engine needs to stop running, the shifting fork is shifted to an idling position, the throttle valve shaft is in a fully-closed position, the choke valve shaft, the membrane type oil switch and the flameout switch are all in an open state, and the engine enters the idling running state before flameout, so that the phenomena of blasting and the like of the engine caused by direct flameout of the engine can be avoided, and the stability of the engine is improved; then the shifting fork is shifted to a flameout position, the membrane type oil switch and the flameout switch are closed, and the engine stops running.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A fuel supply system comprises a body, and a throttle shaft, a choke shaft and a shifting fork which are arranged on the body, and is characterized in that a membrane type oil switch and a flameout switch are arranged on the body corresponding to the shifting fork, the shifting fork comprises a main body and a handle, an installation platform, a choke dial and a switch dial which are arranged on the main body, the main body is connected with the body through a shifting fork positioning rod, the choke dial is arranged corresponding to the choke shaft, a throttle control arm is arranged on the installation platform corresponding to the throttle shaft, the switch dial is arranged corresponding to the membrane type oil switch and the flameout switch, the shifting fork is respectively provided with a starting position, a running position, an idling position and a flameout position corresponding to the starting position, the running position, the idling position and the flameout position, and a starting gear hole, The body is provided with a limiting structure corresponding to the starting gear hole, the running gear hole, the idling gear hole and the flameout gear hole.

2. A fuel supply system as set forth in claim 1, wherein said main body is a cylindrical structural member having a center of rotation, said handle is provided at one side of said main body and extends along an upper side of said main body, said switch dial is provided at a bottom of said main body near one side of said handle, said mounting table is provided at an upper portion of said main body at a side opposite to said handle, said choke dial is provided at an upper portion of said main body between said mounting table and said handle, said bottom of said main body is provided with a shift position boss with respect to said switch dial, and said start shift position hole, run shift position hole, idle shift position hole and extinction shift position hole are sequentially provided on a bottom surface of said shift position boss.

3. A fuel supply system according to claim 1 or 2, wherein the limiting structure includes a limiting hole, a spring and a limiting ball provided on the body, the spring and the limiting ball are both mounted in the limiting hole, both ends of the spring abut against an inner wall of the limiting hole and the limiting ball, respectively, and the limiting ball has an ejecting position and a pressing position with respect to the limiting hole, respectively.

4. A fuel supply system according to claim 1 or 2, wherein said diaphragm type oil switch is provided in correspondence with an oil inlet hole of said body, said diaphragm type oil switch comprising:

a diaphragm upper cover mounted on the body;

5. A fuel supply system as set forth in claim 4 wherein a fuel needle spring is further provided on said fuel needle, said fuel needle spring abutting against said diaphragm and an outer wall of said fuel inlet hole, respectively.

6. A fuel supply system as set forth in claim 4 wherein said diaphragm nut is further provided with a diaphragm spring which abuts against said diaphragm and said diaphragm pressing block, respectively.

7. A fuel supply system according to claim 1 or 2, wherein the throttle shaft includes a throttle shaft body on which the throttle valve is mounted, and a throttle rocker arm and a throttle fence pin that are provided on the throttle shaft body, the throttle control arm abutting against the throttle fence pin.

8. A fuel supply system as set forth in claim 7 wherein said throttle lever arm is further provided with a lever arm torsion spring.

9. The fuel supply system according to claim 1 or 2, wherein the choke shaft includes a choke shaft body, and a choke rocker arm and a choke pin provided on the choke shaft body, and the choke dial abuts against the choke pin.

10. A fuel supply system as claimed in claim 1 or claim 2, wherein a jam nut is mounted on the top of the fork positioning rod.