Carburetor with novel oil drainage structure
By adopting cylindrical protrusions and sealing ring design in the carburetor, the problem of insufficient sealing properties of the existing carburetor is solved, and a good sealing effect under low precision processing and low locking force is achieved.
Patent Information
- Application Number
- CN202422900057.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-11-27
AI Technical Summary
The switch rod projection of the existing carburetor oil discharge mechanism is conical and does not have a sealing ring, which leads to high requirements for processing accuracy and coaxiality, difficult to guarantee sealing, and oil leakage is prone to occur after multiple disassembly and assembly.
A cylindrical protrusion is adopted and equipped with a first sealing ring, combining the second boss and the second sealing ring, reducing the requirements for processing accuracy and coaxiality, increasing friction to ensure sealing and avoid oil leakage.
It achieves good sealing under low-precision processing and low locking force, and does not easily leak oil after multiple disassembly and assembly, which improves the sealing and reliability of the carburetor.
Smart Images
Figure CN223241531U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of carburetors, in particular to a carburetors with a novel oil discharge structure. Background Art
[0002] Existing carburetor oil drain mechanisms primarily use a protrusion at the front end of a switch lever to block the oil drain guide port, preventing fuel from flowing out or leaking. The protrusion on the switch lever is frusto-conical and lacks a sealing ring. This frusto-conical protrusion requires high machining precision and coaxiality to seal the oil drain guide port. Furthermore, a high tightening force is required during assembly to ensure a tight seal. Repeated disassembly and tightening can cause pits on the surface of the protrusion, compromising the seal and causing oil leaks. Utility Model Content
[0003] (1) Technical problems to be solved
[0004] The utility model provides a carburetor with a novel oil drain structure, which overcomes the disadvantages that the convex head of the switch rod of the existing oil drain mechanism is in the shape of a cone and is not equipped with a sealing ring. Therefore, the cone-shaped convex head requires higher processing accuracy and coaxiality requirements to achieve sealing of the oil drain guide port, and a larger locking force is required during the assembly process to ensure the sealing requirement. After disassembly and locking multiple times, pits will be formed on the surface of the convex head, which will also reduce the sealing requirement and cause oil leakage.
[0005] (1) Technical solution
[0006] In order to solve the above technical problems, the utility model provides a carburetor with a novel oil drain structure, including a carburetor body and an oil drain mechanism arranged in the carburetor body, the oil drain mechanism including a float chamber and an oil drain guide port, a guide cavity connected to the oil drain guide port is provided in the bottom shell of the carburetor body, a switch rod is provided in the guide cavity, a first boss is provided on the end of the switch rod facing the oil drain guide port, a convex head for blocking the oil drain guide port is provided on the side of the first boss close to the oil drain guide port, the convex head is cylindrical, a first sealing ring is provided on the end of the convex head close to the first boss, a second boss is provided on the outer periphery of the middle part of the switch rod, a second sealing ring is provided on the switch rod corresponding to the side of the second boss away from the oil drain guide port, and an oil drain port is provided at the bottom of the guide cavity.
[0007] Preferably, the size of the protrusion is adapted to the oil drain guide port.
[0008] Preferably, the lower end of the oil drain port is connected to an oil drain pipe.
[0009] Preferably, the first sealing ring is an O-ring.
[0010] Preferably, the second sealing ring is an O-ring.
[0011] (2) Beneficial effects
[0012] The utility model provides a carburetor with a novel oil drain structure, which is suitable for carburetors used in general-purpose small gasoline engines. It overcomes the shortcomings of existing oil drain mechanisms, such as the convex head of the switch rod being in a frustum shape and not being provided with a sealing ring. This requires high machining precision and coaxiality requirements for the frustum-shaped convex head to achieve sealing of the oil drain guide port, and a large locking force is required during the assembly process to ensure the required sealing. Furthermore, after multiple disassembly and locking, pits will form on the surface of the convex head, which will also reduce the required sealing and cause oil leakage. Compared with the existing technology, the utility model has the following advantages:
[0013] 1. By changing the shape of the switch rod protrusion, the protrusion shape is changed to a cylindrical shape and combined with the first sealing ring, the oil drain guide port can be easily sealed, and there is no need to have too high requirements on the processing accuracy and coaxiality of the protrusion. At the same time, there will be no hidden danger of oil leakage due to poor sealing after multiple disassembly and locking.
[0014] 2. The setting of the second boss and the second sealing ring can increase the friction force, ensure that the first sealing ring can block the oil drain guide port, and prevent the boss from falling out of the oil drain guide port due to external factors, thereby affecting the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural diagram of the present utility model.
[0016] Figure 2 This is a schematic diagram of the structure of the switch rod and the oil drain guide port in the prior art.
[0017] Figure 3 It is a side view of a switch lever in the prior art.
[0018] Figure 4 This is a schematic diagram of the structure of the switch rod and the oil drain guide port in the utility model.
[0019] Figure 5 It is a side view of the switch lever of the utility model.
[0020] The accompanying drawings are marked as follows: 1-carburetor body, 11-bottom shell, 12-float chamber, 13-oil drain guide port, 14-guide cavity, 15-switch rod, 151-boss, 152-first boss, 153-second boss, 16-oil drain port, 17-oil drain pipe, 18-first sealing ring, 19-second sealing ring. DETAILED DESCRIPTION
[0021] The present invention will be further described with reference to the accompanying drawings and embodiments.
[0022] like Figures 1 to 5 As shown, a carburetor with a novel oil drain structure according to the present invention comprises a carburetor body 1 and an oil drain mechanism disposed in the carburetor body 1, wherein the oil drain mechanism comprises a float chamber 12 and an oil drain guide port 13, a guide cavity 14 communicating with the oil drain guide port 13 is disposed in the bottom shell 11 of the carburetor body 1, a switch rod 15 is disposed in the guide cavity 14, and a first boss 152 is disposed on one end of the switch rod 15 facing the oil drain guide port 13, wherein the first boss 152 is disposed on the bottom shell 11 of the carburetor body 1 A convex head 151 for blocking the oil drain guide port 13 is provided on the side of 52 close to the oil drain guide port 13. The convex head 151 is cylindrical, and a first sealing ring 18 is sleeved on the end of the convex head 151 close to the first boss 152. A second boss 153 is provided on the outer periphery of the middle part of the switch rod 15. A second sealing ring 19 is sleeved on the switch rod 15 corresponding to the side of the second boss 153 away from the oil drain guide port 13. An oil drain port 16 is provided at the bottom of the guide cavity 14.
[0023] The size of the protrusion 151 is adapted to the oil drain guide port 13 , and the lower end of the oil drain port 16 is connected to the oil drain pipe 17 .
[0024] The first sealing ring 18 is an O-type sealing ring, and the second sealing ring 19 is an O-type sealing ring.
[0025] In practice, by changing the shape of the protrusion 151 of the switch lever 15 to a cylindrical shape and cooperating with the first sealing ring 18, the oil drain guide opening 13 can be easily sealed, without requiring high machining precision and coaxiality for the protrusion 151. The provision of the second boss 153 and the second sealing ring 19 increases friction, ensuring that the first sealing ring 18 can block the oil drain guide opening 13, preventing external factors from causing the protrusion 151 to fall out of the oil drain guide opening 13 and affecting the sealing performance. Matters not described in detail in this specification represent prior art known to those skilled in the art.
[0026] The above-described embodiments merely represent preferred embodiments of the present invention, and their descriptions are relatively specific and detailed. However, the present invention is not limited to these embodiments. It should be noted that any improvements made without departing from the spirit of the present invention are within the scope of protection of the present invention. Therefore, the scope of protection of this utility model patent shall be based on the appended claims.
Claims
1. A carburetor with a new oil discharge structure, characterized in that: The invention comprises a carburetor body (1) and an oil discharge mechanism arranged in the carburetor body (1), wherein the oil discharge mechanism comprises a float chamber (12) and an oil discharge guide port (13), a guide cavity (14) communicating with the oil discharge guide port (13) is provided in the bottom shell (11) of the carburetor body (1), a switch rod (15) is provided in the guide cavity (14), and a first boss (152) is provided on one end of the switch rod (15) facing the oil discharge guide port (13), and the first boss (152) is close to the oil discharge guide port (13). ) is provided on one side of the switch rod (15) for blocking the oil drain guide port (13), the convex head (151) is cylindrical, and a first sealing ring (18) is sleeved on one end of the convex head (151) close to the first boss (152), a second boss (153) is provided on the outer periphery of the middle part of the switch rod (15), and a second sealing ring (19) is sleeved on the switch rod (15) corresponding to the side of the second boss (153) away from the oil drain guide port (13), and an oil drain port (16) is provided at the bottom of the guide cavity (14).
2. A carburetor with a novel oil discharge structure according to claim 1, characterized in that: The size of the protrusion (151) is adapted to the oil discharge guide port (13).
3. A carburetor with a novel oil discharge structure according to claim 1, characterized in that: The lower end of the oil drain port (16) is connected to the oil drain pipe (17).
4. A carburetor with a novel oil discharge structure according to claim 1, characterized in that: The first sealing ring (18) is an O-type sealing ring.
5. The carburetor with a novel oil discharge structure according to claim 1, characterized in that: The second sealing ring (19) is an O-type sealing ring.