High-efficiency high-reliability low-cost sealing apparatus for gas tightness detection of motorcycle fuel tank

Abstract

The invention, which belongs to the technical field of motorcycle manufacturing, discloses a high-efficiency high-reliability low-cost sealing apparatus for gas tightness detection of a motorcycle fuel tank. The sealing apparatus comprises a support plate; a hollow rubber gasket is arranged on the lower end surface of the support plate; a hollow elastic expansion unit is arranged in the rubber gasket in a sliding fit manner; and a pull rod is arranged in the elastic expansion unit in a sliding fit manner, wherein the pull rod has a taper shape with a small head and a large end. A central hole of the elastic expansion unit corresponds to the external circle of the pull rod; and a grabbing-claw-shaped bending part is arranged at the lower end of the elastic expansion unit in a peripheral direction. The upper end of the pull rod extends out of the elastic expansion unit and is in power connection with a tensile force device. When the pull rod moves up, the bending part of the elastic expansion unit is driven to be in contact with the opening of a fuel tank to form limiting; and the elastic expansion unit expands in a radial direction and the rubber gasket is compressed to form sealing.

Description

technical field [0001] The invention belongs to the technical field of motorcycle manufacturing, and relates to a sealing device for testing the airtightness of a motorcycle fuel tank. Background technique [0002] At present, the production of motorcycle fuel tanks adopts the process of welding first and then testing for air tightness. In order to ensure that the fuel tank meets the product requirements, each vent of the fuel tank must be sealed with a sealing device before testing can be carried out. The sealing devices usually used in the air tightness test of the fuel tank include manual cam sealing device, screw compression sealing device, quick clip compression sealing device, and mid-mounted cylinder compression sealing device. Among them: the manual cam sealing device uses manpower as the power source, and the cam is moved by the handle. It has a simple structure, low work efficiency, high labor intensity, and the cam is easy to wear; The sealing device that direct...

AI Technical Summary

Problems solved by technology

Among them: the manual cam sealing device uses manpower as the power source, and the cam is moved by the handle. It has a simple structure, low work efficiency, high labor intensity, and the cam is easy to wear; The sealing device that directly or indirectly seals the fuel tank port requires repeated tightening and loosening of the threaded rod, which has low work efficiency and is only used in single-piece and small-batch production; the quick-clamp compression sealing device is a quick-push clamp The sealing device for sealing the fuel tank port, the sealing device needs the relatively fixed position of the fuel tank and the quick push clamp, and the position of the sealing device must be adjusted when replacing the product, so it is only suitable for the air tightness test of a single product; the middle-mounted cylinder presses and seals The device is to install a cylinder above the fuel tank port, and use the pulling force of the cylinder to make the sealing block seal the fuel tank port. This sealing device also needs the position of the fuel tank and the cylinder to be relatively fixed. Because the fuel tank needs to bear the thrust of the cylinder, it is easy to deform the fuel tank port, resulting in Poor flatness

[0003] It can be seen that the commonly used sealing device for motorcycle fuel tank air tightness testing is labor-intensive and low in efficiency, and there is a problem of poor flatness caused by deformation of the fuel tank port. An efficient, reliable and low-cost sealing device is urgently needed device

Images