A carburettor

Abstract

The present application relates to carburetor, including carburetor body and choke, the choke is rotatably connected with the carburetor body through the pivot, the carburetor body is connected with the drive motor for driving the pivot rotation, the pivot is linked with first limit piece and second limit piece, the carburetor body is slidably connected with the first drive piece that is driven the pivot and drives the choke to close with first limit piece cooperation, the carburetor body is also slidably connected with the second drive piece that is driven the pivot and drives the choke to open with second limit piece cooperation, the carburetor body is provided with the operation mechanism of manually controlling the first drive piece and the second drive piece sliding, the present application solves the problem that the carburetor cannot automatically control the choke in the prior art and cannot be used.

Description

TECHNICAL FIELD

[0001] The present application relates to a carburetor. BACKGROUND

[0002] The carburetor is a commonly used part on a gasoline engine, and the carburetor is provided with a choke valve for controlling the air intake amount. When the engine starts, the opening angle of the choke valve is controlled to adjust the concentration of the mixed gas entering the cylinder of the engine, so as to improve the starting performance of the engine. After the engine starts successfully, the choke valve is fully opened to reduce the concentration of the mixed gas to the concentration in the running state, so as to make the engine run normally. With the popularization of electronic control technology, the opening and closing of the choke valve are gradually realized by using an electric drive mechanism to achieve automatic control. In some special cases, when the electric drive mechanism for controlling the opening and closing of the choke valve cannot normally control the choke valve due to power failure or electronic equipment failure, the carburetor cannot work normally, thereby affecting the normal use of the engine. SUMMARY

[0003] The purpose of the present application is to provide a carburetor to solve the problem that the carburetor cannot be automatically controlled in the prior art.

[0004] In order to achieve the above-mentioned purpose, the basic scheme of the present application provides a carburetor, comprising a carburetor body and a choke valve, the choke valve is rotatably connected with the carburetor body through a rotating shaft, a drive motor for driving the rotating shaft to rotate is connected to the carburetor body, a first limiting piece and a second limiting piece are connected to the rotating shaft in linkage, a first drive piece for driving the rotating shaft to close the choke valve in cooperation with the first limiting piece is slidably connected to the carburetor body, and a second drive piece for driving the rotating shaft to open the choke valve in cooperation with the second limiting piece is also slidably connected to the carburetor body, and an operating mechanism for manually controlling the sliding of the first drive piece and the second drive piece is arranged on the carburetor body.

[0005] The beneficial effects of the basic scheme are as follows: when the drive motor can drive the rotating shaft to open and close the choke valve, the drive motor is used for operation; when the drive motor cannot drive the choke valve to act, the first drive piece and the second drive piece are slid by using the manual control operating mechanism, the choke valve is closed by the cooperation of the first drive piece and the first limiting piece, and the choke valve is opened by the cooperation of the second drive piece and the second limiting piece, so as to realize the manual control of the choke valve, and the choke valve of the carburetor can be automatically controlled and manually controlled, thereby avoiding the situation that the carburetor cannot be normally used when the carburetor cannot be automatically controlled.

[0006] Further, the carburetor body comprises a support frame, and the first drive piece and / or the second drive piece are slidably connected with the support frame. By adopting such a structure, the manufacturing process is facilitated.

[0007] Further, the first limiting member and the second limiting member are distributed in an axial direction of the rotating shaft. With such an arrangement, the movement space required by the first limiting member and the second limiting member is staggered, thereby reducing the occurrence of mutual interference, and facilitating the reliability of operation.

[0008] Further, the first limiting member and the second limiting member are both fixedly connected with the rotating shaft. With such an arrangement, the structure is facilitated to be simpler, thereby reducing the manufacturing cost.

[0009] Further, the second driving member comprises a connecting portion in sliding cooperation with the carburetor body and a driving portion for cooperation with the second limiting member, the driving portion is connected with the connecting portion to form a pawl structure cooperating with the second limiting member, and the second limiting member has a combination portion in clutch cooperation with the driving portion. With such an arrangement, when the combination portion of the second limiting member is combined with the driving portion through the movement of the second driving member, the second driving member can drive the second limiting member to move, thereby realizing manual control; when the combination portion of the second limiting member is in a separated state from the driving portion, the second limiting member can move relatively with the second driving member, thereby reducing the interference of the second driving member to the second limiting member when the driving motor drives the rotating shaft to rotate.

[0010] Further, the driving portion is elastically connected with the connecting portion, so that the end of the driving portion in contact with the second limiting member can produce displacement in a direction perpendicular to the sliding direction of the connecting portion. With such an arrangement, the driving portion is facilitated to cooperate with the second limiting member under the action of elastic force, thereby facilitating the simplification of structure.

[0011] Further, the driving portion is a torsional spring. With such an arrangement, the structure is facilitated to be further simplified.

[0012] Further, the first driving member and the second driving member are fixedly connected. With such an arrangement, the structure is facilitated to be further simplified.

[0013] Further, a reset spring is arranged between the first driving member and / or the second driving member and the carburetor body. With such an arrangement, the first driving member and the second driving member can be reset through the reset spring after changing position under the action of the operating mechanism, thereby simplifying the structure and facilitating the operation.

[0014] Further, a guide rail is fixedly connected on the support frame, the first driving member and the second driving member are both slidingly sleeved on the guide rail, and the reset spring is sleeved on the guide rail. With such an arrangement, the sliding arrangement of the first driving member and the second driving member on the carburetor body is facilitated, thereby facilitating the manufacturing. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1Figure 1 is a schematic view of a carburetor according to an embodiment of the present application;

[0016] Figure 2 Figure 2 is a sectional view of the first driving member and the second driving member in the initial position;

[0017] Figure 3 Figure 3 is a sectional view of the first driving member driving the choke valve to the closed state;

[0018] Figure 4 Figure 4 is a schematic view of the first driving member driving the first limiting member; Figure 2 Figure 5 is a schematic view of the second driving member in the initial position;

[0019] Figure 5 Figure 6 is a schematic view of the first driving member driving the second limiting member; Figure 3 Figure 7 is a schematic view of the second driving member driving the second limiting member;

[0020] Figure 6 Figure 8 is a schematic view of the second driving member driving the second limiting member in the second embodiment of the present application;

[0021] Figure 7 Figure 9 is a schematic view of the second driving member in the initial position in the second embodiment of the present application;

[0022] Figure 8 Figure 10 is a schematic view of the first driving member driving the first limiting member in the second embodiment of the present application;

[0023] Figure 9 Figure 11 is a schematic view of the second driving member driving the second limiting member in the second embodiment of the present application. DETAILED DESCRIPTION

[0024] The present application will be further described in detail by the following embodiments:

[0025] The reference signs in the drawings of the present application include: carburetor body 1, choke valve 2, driving motor 3, rotating shaft 4, second limiting member 5, combining part 51, first limiting member 6, supporting frame 7, first driving member 8, pushing block part 81, second driving member 9, driving part 91, connecting part 92, operating mechanism 11, guide rail 12, and return spring 13.

[0026] Embodiment 1: substantially as shown in the drawings of the present application; Figures 1 to 6The carburetor includes a carburetor body 1 and a choke valve 2, the choke valve 2 is rotatably connected with the carburetor body 1 through a rotating shaft 4, the carburetor body 1 is connected with a driving motor 3 for driving the rotating shaft 4 to rotate, specifically, in order to facilitate manufacturing, the carburetor body 1 includes a detachable support frame 7, the driving motor 3 is installed on the support frame 7, the opening and closing of the choke valve 2 is realized by driving the rotating shaft 4 through the driving motor 3, thereby realizing the automatic control of the choke valve 2 of the carburetor. The rotating shaft 4 is connected with a first limiting piece 6 and a second limiting piece 5, in the embodiment, the first limiting piece 6 and the second limiting piece 5 are preferably fixedly connected on the rotating shaft 4, so that the first limiting piece 6 and the second limiting piece 5 form a cantilever structure extending along the radial direction of the rotating shaft 4, and the first limiting piece 6 and the second limiting piece 5 are distributed in the axial direction of the rotating shaft 4. In order to facilitate manufacturing, the first limiting piece 6 and the second limiting piece 5 are preferably integrally formed in the embodiment.

[0027] The carburetor body 1 is connected with a first driving piece 8 cooperating with the first limiting piece 6 to drive the rotating shaft 4 to drive the choke valve 2 to close, in the embodiment, the first driving piece 8 has a pushing block part 81 extending along the direction perpendicular to the sliding direction, when the pushing block part 81 contacts the first limiting piece 6 by moving the first driving piece 8, the first limiting piece 6 is pushed to rotate, thereby driving the rotating shaft 4 to rotate the choke valve 2, realizing the closing operation of the choke valve 2. In the embodiment, preferably, the sliding cooperation between the first driving piece 8 and the carburetor body 1 is realized by connecting and fixing a guide rail 12 on the support frame 7, and the first driving piece 8 is slidably sleeved on the guide rail 12 to realize the sliding cooperation between the first driving piece 8 and the carburetor body 1.

[0028] The carburetor body 1 is also slidably connected with the second driving member 9 cooperating with the second limiting member 5 to drive the rotating shaft 4 to open the choke valve 2. In the embodiment, the second driving member 9 includes a connecting portion 92 slidably connected with the carburetor body 1 and a driving portion 91 used to contact the second limiting member 5. The driving portion 91 is connected with the connecting portion 92 to form a ratchet structure cooperating with the second limiting member 5. The second limiting member 5 has a combination portion 51 in engagement with the driving portion 91. When the driving portion 91 is separated from the combination portion 51, the driving portion 91 cannot drive the second limiting member 5 to rotate through the combination portion 51, so that the second limiting member 5 and the second driving member 9 can relatively move. When the driving portion 91 is combined with the combination portion 51, the driving portion 91 can drive the second limiting member 5 to rotate through the combination portion 51, so as to realize the operation of the rotating shaft 4 driving the choke valve 2 to open. In the embodiment, the driving portion 91 and the connecting portion 92 are elastically connected to realize the reset of the driving portion 91 after the movement of the driving portion 91 in the direction perpendicular to the sliding direction of the connecting portion 92. Preferably, the displacement direction of the driving portion 91 under the elastic action is parallel to the axial direction of the rotating shaft 4. When the first driving member 8 drives the rotating shaft 4 to rotate through the first limiting member 6, the second limiting member 5 also rotates with the rotating shaft 4. At this time, the driving portion 91 contacts the second limiting member 5 and is deformed under the elastic action. For example, an inclined guide surface is arranged on the top of the second limiting member 5. The driving portion 91 first contacts the guide surface of the second limiting member 5, so that the driving portion 91 is deformed under the action of the guide surface. Thus, the second limiting member 5 and the second driving member 9 are prevented from interfering with each other when the driving portion 91 is separated from the combination portion 51. Thus, the driving portion 91 can realize the switching of the combination portion 51 from the separated state to the combined state in a small stroke range. For example, the torsional spring is used as the driving portion 91.

[0029] The connecting portion 92 comprises a pin shaft and a pin shaft mounting seat in this embodiment, the pin shaft mounting seat is integrally formed with the first driving member 8, the installation of the driving portion 91 is realized through the pin shaft, the pin shaft mounting seat slides along the guide rail 12 with the first driving member 8, so that the synchronous movement of the first driving member 8 and the second driving member 9 is realized, and thus the structure is simplified. Of course, the pin shaft mounting seat of the connecting portion 92 can also be separately connected with the guide rail 12 to slide, so that the connecting portion 92 is connected with the support frame 7 to slide through the guide rail 12, and thus the second driving member 9 is connected with the support frame 7 to slide. The carburetor body 1 is provided with an operating mechanism 11 for manually controlling the sliding of the first driving member 8 and the second driving member 9, the operating mechanism 11 is similar to the clutch wire structure in the prior art, one end of the operating mechanism 11 is connected and fixed with the first driving member 8, so that the sliding of the first driving member 8 and the second driving member 9 can be realized by manually pulling the operating mechanism 11. The carburetor body 1 is provided with a return spring 13 between the first driving member 8, the return spring 13 is opposite to the force direction of the operating mechanism 11, and in this embodiment, the return spring 13 is preferably sleeved on the guide rail 12.

[0030] The specific implementation process is as follows: without manually controlling the operating mechanism 11, the first driving member 8 and the second driving member 9 are in the initial position under the action of the return spring 13, at this time, the first driving member and the first limiting member, the second driving member and the second limiting member are in a separated state, so that the rotating shaft 4 can be driven to rotate by the driving motor 3 without being limited by the first driving member and the second driving member, so that the rotating shaft 4 drives the choke valve 2 to open and close, and thus the automatic control of the choke valve 2 is realized.

[0031] When the driving motor 3 cannot work normally, the choke valve 2 can be in any position at this time, the connecting portion 51 of the second limiting member 5 is in a separated state with the driving portion 91 of the second driving member 9. When the choke valve 2 needs to be closed to start the engine, the first driving member 8 and the second driving member 9 are moved by manually controlling the operating mechanism 11 (the direction shown by the arrow in the figure is the moving direction of the first driving member and the second driving member), so that the first driving member 8 drives the rotating shaft 4 to rotate by pushing the first limiting member 6 in the moving process, so that the rotating shaft 4 drives the choke valve 2 to close, and thus the starting operation of the engine is facilitated.

[0032] When the choke valve 2 needs to be partially opened (the opening angle of the choke valve is smaller than that in the fully opened state) for starting, the choke valve 2 is first brought to the closed state by the manual control operation mechanism 11, the reset spring 13 is compressed and deformed, and at the same time, the driving part 91 of the second driving member 9 and the combination part 51 of the second limiting member 5 are changed from the separated state to the combined state due to the relative movement between the second driving member 9 and the second limiting member 5. Then, the force applied by the operation mechanism 11 to the first driving member 8 and the second driving member 9 is reduced, the reset spring 13 pushes the first driving member 8 and the second driving member 9 to move towards the initial position, and the displacement of the first driving member 8 and the second driving member 9 is timely reflected on the control stroke (such as the movement distance of the pulling end of the existing technology) of the operation mechanism 11. During the movement of the second driving member 9 towards the initial position, the driving part 91 of the second driving member 9 drives the second limiting member 5 to rotate the shaft 4 through the combination part 51, so that the shaft 4 drives the choke valve 2 to rotate and open. The opening angle of the choke valve 2 can be controlled by controlling the control stroke of the operation mechanism 11, so as to realize the partial opening of the choke valve 2 for starting the engine.

[0033] When the choke valve 2 needs to be repeatedly opened and closed for starting, the choke valve 2 is closed by controlling the operation mechanism 11, and then the force applied by the operation mechanism 11 to the first driving member 8 and the second driving member 9 is reduced, so that the reset spring 13 pushes the first driving member 8 and the second driving member 9 to return to the initial position, thereby driving the second limiting member 5 to rotate the shaft 4 through the combination part 51, so that the shaft 4 drives the choke valve 2 to open. Then, the above operation is repeated, so as to realize the repeated opening and closing of the choke valve for starting the engine. By using the scheme, the carburetor has both automatic and manual control modes, so as to avoid the situation that the carburetor cannot be normally used in some special cases.

[0034] Embodiment 2: The difference from Embodiment 1 is only that, as shown in Figures 7 to 9 the driving part 91a of the second driving member 9 is a claw-shaped structure elastically connected with the connecting part, and the elastic claw-shaped structure is used to realize the engagement and disengagement with the combination part 51 of the second limiting member 5.

[0035] The above-mentioned is only an embodiment of the present application, and the well-known specific structures and characteristics in the scheme are not described in detail. It should be pointed out that, for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be regarded as the protection scope of the present application, and these will not affect the effect and practicality of the patent.

Claims

1. A carburetor, comprising a carburetor body and a choke, the choke being rotatably connected to the carburetor body via a rotating shaft, and a drive motor for driving the rotating shaft is connected to the carburetor body, characterized in that: The first limiting member and the second limiting member are arranged on the rotating shaft in linkage, the first limiting member and the second limiting member are distributed in axial direction of the rotating shaft, the carburetor body is slidably connected with the first limiting member to drive the rotating shaft to close the choke valve, the carburetor body is also slidably connected with the second limiting member to drive the rotating shaft to open the choke valve, the carburetor body is provided with an operating mechanism for manually controlling the sliding of the first driving member and the second driving member; the second driving member comprises a connecting portion and a driving portion for cooperating with the second limiting member, the connecting portion is fixedly connected with the first driving member, the driving portion is connected with the connecting portion to form a ratchet structure for cooperating with the second limiting member, the second limiting member has a combination portion for clutching cooperation with the driving portion, the driving portion is elastically connected with the connecting portion, so that the end of the driving portion in contact with the second limiting member can produce displacement along the sliding direction perpendicular to the connecting portion, the top of the second limiting member is provided with an inclined guide surface, the driving portion first contacts the guide surface of the second limiting member, so that the driving portion is deformed under the action of the guide surface.

2. The carburetor of claim 1, wherein: The carburetor body comprises a support frame, and the first driving member and / or the second driving member are slidably connected with the support frame.

3. The carburetor of claim 2, wherein: The first limiting member and the second limiting member are fixedly connected with the rotating shaft.

4. The carburetor of claim 3, wherein: The first limiting member and the second limiting member are integrally formed.

5. A carburettor according to any one of claims 2 to 4, wherein: The second driving member comprises a connecting portion and a driving portion for cooperating with the second limiting member, the connecting portion is slidably connected with the support frame, the driving portion is connected with the connecting portion to form a ratchet structure for cooperating with the second limiting member, and the second limiting member has a combination portion for clutching cooperation with the driving portion.

6. The carburettor of any one of claims 2 to 4, wherein: The driving portion is a torsion spring.

7. The carburetor of claim 5, wherein: The driving portion is a torsion spring.

8. The carburetor of any one of claims 2 to 4, wherein: A return spring is arranged between the first driving member and / or the second driving member and the carburetor body.

9. The carburetor of claim 5, wherein: A return spring is arranged between the first driving member and / or the second driving member and the carburetor body.

10. The carburetor of claim 8, wherein: A guide rail is fixedly connected to the support frame, the first driving member and the second driving member are slidably sleeved on the guide rail, and the return spring is sleeved on the guide rail.

11. The carburetor of claim 9, wherein: A guide rail is fixedly connected to the support frame, the first driving member and the second driving member are slidably sleeved on the guide rail, and the return spring is sleeved on the guide rail.

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