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Fuel tank

A technology for fuel tanks and tanks, which is applied in the direction of liquid fuel feeders, charging systems, containers, etc., which can solve the problems of fuel tank weight increase, etc., to suppress transmission vibration, improve light weight and durability, and improve durability Effect

Inactive Publication Date: 2008-06-04
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the general-purpose engine is sometimes in a state of rollover due to its severe operating environment. At this time, the fuel tank also has to resist a large impact force, and it is especially required that the flange joints of the upper and lower tank halves have no High intensity where a fuel leak occurs
In addition, conventionally, this requirement has been met by increasing the thickness of the steel plate used as the raw material of the tank body. However, the increase in the thickness of the steel plate leads to an increase in the weight of the fuel tank.

Method used

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Embodiment 1

[0054] First, in FIG. 1 , symbol E denotes a general-purpose four-stroke engine as a power source of various working machines. This engine E has a crankcase 2 supporting a crankshaft 1 arranged in the horizontal direction and a cylinder portion 3 protruding obliquely upward from the crankcase 2, and a fuel tank T supported by the crankcase 2 is arranged directly above the crankcase 2, and A carburetor 4 is installed on one side of the cylinder part 3, and an air cleaner 6 is connected to the carburetor 4 through the intake passage 5. The air cleaner 6 is arranged on the side of the fuel tank T in the cylinder. section 3 directly above.

[0055] As shown in Fig. 2, Fig. 3 and Fig. 6, the above-mentioned fuel tank T is composed of the following three parts: an upper tank half body 7 and a lower tank half body 8 which are respectively formed into a cup shape and face each other to define a fuel storage chamber 10; And a cup-shaped bottom support plate 9 covering the lower surfac...

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Abstract

A fuel tank formed by integrally forming flanges (7f, 8f) at the peripheral edge parts of bowl-like steel sheet-made upper tank half body (7) and lower tank half body (8), and overlappingly joining these flanges (7f, 8f), liquid-tight, to each other. These both flanges (7f, 8f) are fixedly caulked in a roll shape to form an annular thick wall joined part (12), and a pair of annular reinforcement ribs (7r, 8r) arranged continuously with both sides of the joined part (12) are formed on the upper and lower tank half bodies (7, 8). Thus, a sufficient strength can be imparted to the periphery of the joined part of the flanges without increasing the thickness of the steel sheet.

Description

technical field [0001] The present invention relates to a fuel tank in which flanges are integrally formed on respective peripheries of cup-shaped upper tank half and lower tank half made of steel plate, and the flanges are overlapped so as to be liquid-tight. In particular, it relates to the improvement of a fuel tank for a general-purpose engine suitable for loading in a working machine. Background technique [0002] In a related conventional fuel tank, welding (Patent Document 1) or caulking is used to join the flanges of the upper tank half body and the lower tank half body. [0003] Patent Document 1: Japanese Publication No. 57-22026 [0004] However, the general-purpose engine is sometimes in a state of rollover due to its severe operating environment. At this time, the fuel tank also has to resist a large impact force, and it is especially required that the flange joints of the upper and lower tank halves have no High intensity where fuel leaks occur. In addition,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D8/20B60K15/03F02M37/00
Inventor 坂本一弘齐藤照幸松原泰则
Owner HONDA MOTOR CO LTD