A diaphragm carburetor assembly

Abstract

The utility model relates to carburetor field discloses a diaphragm type carburetor assembly, including support clamping plate, support clamping plate inside fixedly connected with carburetor body, there is a certain gap between support clamping plate and carburetor body, support clamping plate one side surface is connected with filter mechanism, filter mechanism is detachably connected. In the utility model, the gap between support clamping plate and carburetor body improves the heat dissipation efficiency when carburetor works, controls fuel mixture flow through the centrifugal valve of its internal engine speed adjustment, and the filter mechanism utilizes the negative pressure generated by the carburetor, cooperates reset spring, and the vacuum at the throat pipe is transmitted to the diaphragm above through the pipeline, the diaphragm deforms downward to overcome the elastic force of reset spring, pushes the connecting rod and drives the cleaning needle to scrape downward, and conversely, the engine speed drops, and the reset spring pushes the cleaning needle to scrape upward, so reciprocating cleaning filter screen, and the filtering effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of carburetors, and more particularly to a diaphragm carburetor assembly. Background Technology

[0002] The diaphragm carburetor assembly is a collection of key carburetor components with an elastic diaphragm as the core control element. It dynamically adjusts the fuel intake volume by the elastic deformation of the diaphragm driven by the vacuum of the intake manifold, achieving a precise fuel-air ratio. During long-term use, fuel impurities and particulate matter in the air can easily adhere to the diaphragm surface, nozzle orifice, or throttle valve. If self-cleaning is not performed, it can lead to nozzle blockage, diaphragm sticking, or throttle valve adhesion, causing starting difficulties, reduced power, increased fuel consumption, and even excessive emissions. At the same time, the accumulation of contaminants may also damage the diaphragm elasticity and nozzle precision, shortening the life of the assembly and engine. Therefore, self-cleaning is a necessary measure to maintain its efficient operation and extend its service life.

[0003] Existing patent number CN222863512U discloses a diaphragm carburetor assembly, relating to the field of carburetors. It includes a carburetor body and a filter assembly disposed on one side of the carburetor body. The filter assembly includes a filter box with a top plate at its top. At least two filter screens are connected to the bottom of the top plate. A collection box is fixed to one side of the bottom of each filter screen. When the filter box is opened, the top plate can be lifted, causing the two filter screens to move upwards. As the filter screens move upwards, the side of the filter screens near the intake pipe comes into contact with and rubs against a sponge block, thereby cleaning the filter screens. Because of the collection box, falling dust and impurities are collected. Due to the low friction, the rotation of the rotating plate is not affected, thus automatically completing the cleaning and collection process.

[0004] In the process of realizing this application, the inventors discovered the following problems with the prior art: this structure requires operators to manually wash the filter screen repeatedly during cleaning, which is time-consuming and laborious.

[0005] Therefore, those skilled in the art have provided a diaphragm carburetor assembly to solve the problems mentioned in the background art. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a diaphragm carburetor assembly. This assembly has a simple and compact structure, low manufacturing cost, and can stabilize the carburetor's operating temperature within a suitable range by generating heat from the carburetor's operation and linking it with other mechanisms. Furthermore, it can autonomously control the opening and closing of the choke according to the operation progress. The filter mechanism achieves self-cleaning through the carburetor's own negative pressure and a reset spring, saving time.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a diaphragm carburetor assembly, including a support plate, a carburetor body fixedly connected inside the support plate, a certain gap between the support plate and the carburetor body, and a filter mechanism connected to one side surface of the support plate, the filter mechanism being detachably connected.

[0008] Furthermore, the support clamp includes a support frame, a nozzle is fixedly connected to the surface of the support frame, and idle air holes are fixedly connected to both sides of the support frame.

[0009] Furthermore, a storage box is fixedly connected to the lower surface of the support frame, a temperature display is fixedly connected to the surface of the support frame, and a fixing frame is fixedly connected to both inner surfaces of the support frame.

[0010] Furthermore, the carburetor body includes a housing, an air valve is fixedly connected to the upper surface of the housing, a rotary valve is connected to the upper surface of the air valve, a centrifuge tube valve core is connected to the upper surface of the housing, and a track is connected between the rotary valve and the surface of the centrifuge tube valve core.

[0011] Furthermore, a heat dissipation box is fixedly connected to the back of the housing, a heat dissipation vent is fixedly connected to the surface of the heat dissipation box, a filter screen is connected to the upper surface of the heat dissipation vent, a door hinge is fixedly connected to one side surface of the heat dissipation box, a windbreak door is fixedly connected to one side surface of the door hinge, a bimetallic strip assembly is connected to the upper surface of the door hinge, and a lever is fixedly connected to the surface of the bimetallic strip assembly.

[0012] Furthermore, the filtration mechanism includes a mounting base, a measuring hole fixedly connected to the surface of the mounting base, a filter screen connected inside the mounting base, and a pull plate fixedly connected to the upper surface of the filter screen.

[0013] Furthermore, a connecting rod is fixedly connected to the surface of the pull plate, an elastic cleaning needle is connected to one side of the connecting rod, and a return spring is fixedly connected to the lower surface inside the mounting base.

[0014] This utility model has the following beneficial effects: 1. The present invention proposes a diaphragm carburetor assembly, which supports the gap between the clamp and the carburetor body, and improves the heat dissipation efficiency of the carburetor during operation by cooperating with the heat dissipation box and heat dissipation port. At the same time, it utilizes the heat generated by the carburetor itself, resulting in higher heat transfer efficiency. It is linked with other components and controls the fuel mixing flow through the centrifugal valve that adjusts the engine speed inside, thereby automatically maintaining idle speed stability.

[0015] 2. The diaphragm carburetor assembly proposed in this utility model utilizes the negative pressure generated by the carburetor itself, in conjunction with a return spring. When the engine is running, the vacuum at the throat is transmitted to the top of the diaphragm through the pipeline. The diaphragm overcomes the elastic force of the return spring and deforms downward, pushing the connecting rod to drive the cleaning needle to scrape downward. Conversely, when the engine speed decreases, the return spring pushes the cleaning needle to scrape upward. This process is repeated to clean the filter screen, thereby improving the filtration effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the support clamp structure of this utility model; Figure 3 This is a schematic diagram of the carburetor body structure of this utility model; Figure 4 This is a schematic diagram of the filter mechanism of this utility model.

[0017] Legend: 1. Support plate; 2. Carburetor body; 3. Filter mechanism; 101. Support frame; 102. Nozzle; 103. Idle air port; 104. Storage tank; 105. Temperature display; 106. Fixture; 201. Housing; 202. Air valve; 203. Rotary valve; 204. Centrifugal tube valve core; 205. Track; 206. Radiator box; 207. Radiator vent; 208. Filter screen sleeve; 209. Door hinge; 210. Choke; 211. Bimetallic strip assembly; 212. Lever; 301. Mounting base; 302. Measuring hole; 303. Filter screen; 304. Pull plate; 305. Connecting rod; 306. Elastic cleaning needle; 307. Return spring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] refer to Figure 1 One embodiment of this utility model is a diaphragm carburetor assembly, including a support plate 1, a carburetor body 2 fixedly connected inside the support plate 1, a certain gap between the support plate 1 and the carburetor body 2, and a filter mechanism 3 connected to one side surface of the support plate 1, which is detachably connected.

[0020] Specifically, the support plate 1 serves as the load-bearing support structure for the carburetor assembly, used to fix the carburetor body 2 and provide installation support, providing installation space for the carburetor body 2 and the filter mechanism 3 and playing a role in heat conduction. The carburetor body 2, as the component that realizes the mixing of fuel and air, adjusts the fuel-air ratio through its internal structure and generates heat and negative pressure to link other components. The filter mechanism 3 is used to filter the air and fuel entering the carburetor to prevent impurities from affecting the carburetor performance, and its detachable design facilitates cleaning and maintenance.

[0021] refer to Figure 1-4 The support plate 1 includes a support frame 101, a nozzle 102 is fixedly connected to the surface of the support frame 101, and idle air holes 103 are fixedly connected to both sides of the support frame 101.

[0022] Specifically, the support frame 101 serves as the main structure of the support clamp 1, providing stable support and installation space. When the carburetor has no fuel to deliver, the fuel flow is adjusted by the nozzle 102 to fully mix with the air. The idle air hole 103 is used to provide the carburetor with an appropriate amount of air when the engine is idling, ensuring the stability of the idle speed.

[0023] refer to Figure 1-4 A storage box 104 is fixedly connected to the lower surface of the support frame 101, a temperature display 105 is fixedly connected to the surface of the support frame 101, and a fixing frame 106 is fixedly connected to the inner two sides of the support frame 101.

[0024] Specifically, the storage box 104 is used to store fuel to prevent it from affecting the normal operation of the carburetor, the temperature display 105 displays the working temperature of the carburetor in real time for easy monitoring by operators, and the mounting bracket 106 is used to further stabilize the structure of the carburetor body 2 and enhance overall stability.

[0025] refer to Figure 1-4 The carburetor body 2 includes a housing 201, an air valve 202 is fixedly connected to the upper surface of the housing 201, a rotary valve 203 is connected to the upper surface of the air valve 202, a centrifugal tube valve core 204 is connected to the upper surface of the housing 201, and a track 205 is connected between the surfaces of the rotary valve 203 and the centrifugal tube valve core 204.

[0026] Specifically, the housing 201 serves as the external structure of the carburetor body 2, protecting the internal components. The air valve 202 controls the intake and exhaust of air. The rotary valve 203 adjusts the flow and direction of air by rotation. The centrifugal tube valve core 204 regulates the fuel supply based on the centrifugal force generated by the engine speed. Specifically, the centrifugal blocks inside the centrifugal tube valve core 204 expand and contract due to fluctuations in engine speed. When the speed is too low, the centrifugal blocks contract, the valve core retracts, the idle speed channel opening increases, and the fuel flow increases. When the speed is too high, the centrifugal blocks open, the valve core advances, the channel opening decreases, and the fuel flow decreases. The carburetor itself controls the fuel flow. The track 205 links the rotary valve 203 and the centrifugal tube valve core 204, enabling them to work together and achieve the fuel-air ratio independently.

[0027] refer to Figure 1-4 A heat sink 206 is fixedly connected to the back of the housing 201. A heat sink 207 is fixedly connected to the surface of the heat sink 206. A filter screen 208 is connected to the upper surface of the heat sink 207. A door hinge 209 is fixedly connected to one side of the heat sink 206. A windbreak door 210 is fixedly connected to one side of the door hinge 209. A bimetallic strip assembly 211 is connected to the upper surface of the door hinge 209. A lever 212 is fixedly connected to the surface of the bimetallic strip assembly 211.

[0028] Specifically, the radiator box 206 is used to dissipate the heat generated during carburetor operation, preventing excessive temperature from affecting its performance. The radiator vent 207 serves as a heat dissipation channel. The filter screen 208 prevents dust and impurities from entering the radiator box 206 through the radiator vent 207 and can be easily disassembled and replaced. The door hinge 209 serves as the rotation shaft of the choke 210, allowing the choke 210 to rotate flexibly. The choke 210 is used to regulate the amount of air entering the carburetor. The bimetallic strip assembly 211 is made of copper-nickel-chromium alloy and deforms according to temperature changes, ensuring sufficient bending displacement when the temperature changes. It drives the choke 210 to rotate via the lever 212. Increasing the torque can overcome resistance and drive the choke 210 to rotate. When the temperature rises, the bimetallic strip assembly 211 bends due to heat, pushing the choke 210 to close via the lever 212, reducing air intake and lowering the combustion temperature. Conversely, it opens the choke 210, increasing the amount of air intake and improving combustion efficiency.

[0029] refer to Figure 1-4 The filter mechanism 3 includes a mounting base 301, a measuring hole 302 fixedly connected to the surface of the mounting base 301, a filter screen 303 connected inside the mounting base 301, and a pull plate 304 fixedly connected to the upper surface of the filter screen 303.

[0030] Specifically, the mounting base 301 serves as the main structure of the filter mechanism 3, providing mounting support for other components. The metering orifice 302 is used to control the ratio of fuel to air. The filter screen 303 filters the air and fuel entering the carburetor to prevent impurities from affecting the carburetor's performance. The pull plate 304 facilitates the disassembly and installation of the filter screen 303 by operators, making cleaning and maintenance convenient.

[0031] refer to Figure 1-4 A connecting rod 305 is fixedly connected to the surface of the pull plate 304, and an elastic cleaning needle 306 is connected to one side of the surface of the connecting rod 305. A return spring 307 is fixedly connected to the lower surface inside the mounting base 301.

[0032] Specifically, the connecting rod 305, as a component connecting the pull plate 304 and the elastic cleaning needle 306, plays the role of transmitting power. Under the negative pressure generated by the engine operation, the elastic cleaning needle 306 moves up and down with the connecting rod 305 to scrape and clean the filter screen 303, preventing impurities from clogging the filter screen 303. The return spring 307 is used to push the connecting rod 305 and the elastic cleaning needle 306 upward when the engine speed decreases and the negative pressure decreases, so as to achieve reciprocating cleaning without manual operation.

[0033] Working Principle: When the engine starts, the carburetor body 2 begins to work, generating a vacuum negative pressure at the throat. This negative pressure is transmitted to the filter mechanism 3 through the pipeline. Under the action of the negative pressure, the diaphragm overcomes the elastic force of the return spring 307 and deforms downward. The deformation of the diaphragm pushes the connecting rod 305 downward, and the connecting rod 305 drives the elastic cleaning needle 306 downward simultaneously. During the downward movement, the elastic cleaning needle 306 scrapes the surface of the filter screen 303, removing impurities attached to the filter screen 303. As the engine speed changes, the magnitude of the negative pressure also changes. When the engine speed increases, the negative pressure increases, the diaphragm continues to deform downward, and the elastic cleaning needle 306 continues to scrape the filter screen downward. Conversely, when the engine speed decreases, the return spring 307 pushes the diaphragm upward to return to its original position. The diaphragm drives the connecting rod 305 and the elastic cleaning needle 306 upward, and the elastic cleaning needle 306 scrapes the filter screen 303 again during the upward movement. The scraping cleaning process, which enables the elastic cleaning needle 306 to automatically clean the filter screen 303, saves time and manpower. The heat generated by the carburetor body 2 during operation is dissipated through the gap between the support plate 1 and the carburetor body 2, as well as the radiator box 206 and the radiator vent 207. The heat generated by the operation itself is used to control the fuel mixture flow through the internal engine speed regulating centrifugal tube valve core 204 in conjunction with the rotary valve 203. The centrifugal block inside the centrifugal tube valve core 204 expands and contracts due to fluctuations in engine speed. When the speed is too low, the centrifugal block contracts, the valve core retracts, the opening of the idle speed channel increases, and the fuel flow increases. When the speed is too high, the centrifugal block opens, the valve core advances, the channel opening decreases, and the fuel flow decreases, automatically maintaining idle speed stability. This also controls the expansion and contraction of the bimetallic strip assembly 211, controls the opening and closing of the choke 210, and controls the air flow to achieve the effect of controlling the carburetor's working state.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A diaphragm carburetor assembly, comprising a support plate (1), characterized in that: The carburetor body (2) is fixedly connected inside the support clamp (1). There is a gap between the support clamp (1) and the carburetor body (2). A filter mechanism (3) is connected to one side surface of the support clamp (1). The filter mechanism (3) is detachably connected.

2. The diaphragm carburetor assembly according to claim 1, characterized in that: The support clamp (1) includes a support frame (101), a nozzle (102) is fixedly connected to the surface of the support frame (101), and idle air holes (103) are fixedly connected to both sides of the support frame (101).

3. A diaphragm carburetor assembly according to claim 2, characterized in that: A storage box (104) is fixedly connected to the lower surface of the support frame (101), a temperature display (105) is fixedly connected to the surface of the support frame (101), and a fixing frame (106) is fixedly connected to the inner two sides of the support frame (101).

4. A diaphragm carburetor assembly according to claim 1, characterized in that: The carburetor body (2) includes a housing (201), an air valve (202) is fixedly connected to the upper surface of the housing (201), a rotary valve (203) is connected to the upper surface of the air valve (202), a centrifugal tube valve core (204) is connected to the upper surface of the housing (201), and a track (205) is connected between the rotary valve (203) and the surface of the centrifugal tube valve core (204).

5. A diaphragm carburetor assembly according to claim 4, characterized in that: A heat sink (206) is fixedly connected to the back of the housing (201). A heat sink (207) is fixedly connected to the surface of the heat sink (206). A filter screen (208) is connected to the upper surface of the heat sink (207). A door hinge (209) is fixedly connected to one side of the heat sink (206). A windbreak door (210) is fixedly connected to one side of the door hinge (209). A bimetallic strip assembly (211) is connected to the upper surface of the door hinge (209). A lever (212) is fixedly connected to the surface of the bimetallic strip assembly (211).

6. A diaphragm carburetor assembly according to claim 1, characterized in that: The filtration mechanism (3) includes a mounting base (301), a measuring hole (302) is fixedly connected to the surface of the mounting base (301), a filter screen (303) is connected inside the mounting base (301), and a pull plate (304) is fixedly connected to the upper surface of the filter screen (303).

7. A diaphragm carburetor assembly according to claim 6, characterized in that: A connecting rod (305) is fixedly connected to the surface of the pull plate (304), and an elastic cleaning needle (306) is connected to one side of the connecting rod (305). A reset spring (307) is fixedly connected to the lower surface inside the mounting base (301).

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