Maintainable tensioning device for engineering machinery crawler belt

Abstract

The invention relates to a maintainable tensioning device for an engineering machinery crawler belt, relates to the technical field of engineering machinery crawler belts, solves a problem that the tensioning device is easy to damage; the device comprises a support, a connecting rod, an end cover, a spring, a spring box body, an oil cylinder and a piston, the spring is arranged in the spring box body, the oil cylinder is arranged in the spring, and an oil injector is arranged at one end of the oil cylinder. A piston is arranged in the oil cylinder, one end of the connecting rod is connected with the piston, the other end of the connecting rod is connected with the support through a bolt, the end cover is arranged at an outlet, extending out of the spring box body, of the connecting rod, abush is arranged on the cylindrical face of an inner hole of the end cover, a dustproof ring is arranged on the outer side of the bush, and a cover plate is arranged on the outer side of the end cover. When a guide wheel walks up and down, axial load is transmitted between the connecting rod and the piston, and problems of eccentric wear and oil leakage of the sealing ring caused by lateral load are solved; the contact ends of the pull rod and the piston are matched spherical surfaces with the same size, and the influence of lateral loads is eliminated through spherical surface matching.

Description

technical field [0001] The invention relates to a construction machinery crawler, in particular to a maintainable tensioning device for the construction machinery crawler. Background technique [0002] The crawler-type traveling mechanism is composed of a chassis frame, crawler tracks, rollers, supporting sprockets, driving wheels, guide wheels and tensioning devices. It has the characteristics of high grounding specific pressure and good passability, and is widely used in construction machinery walking systems. Wherein, the front end of the tensioning device is connected with the guide wheel, and the rear end is connected with the chassis frame. When the guide wheel is subjected to impact load during walking, or foreign objects such as sand and gravel are involved between the sprocket and the track, the tensioning device is compressed by force, so that the guide wheel produces an elastic stroke, which acts as a buffer and prevents the track from being overloaded and damaged...

AI Technical Summary

Problems solved by technology

The inside of the bushing is coated with grease, which can form an oil film for lubrication and protection. During long-term use, because it cannot be maintained with oil injection, the lubrication between the tie rod and the bushing is insufficient, causing damage to the bushing

The existing dust-proof ring structure is in the form of a single lip, and the dust-proof effect is poor. Especially in the harsh working conditions of dust and humid weather, the dust-proof effect of the single-lip structure is poor, and it cannot effectively prevent dust from entering the tensioning device, causing Corrosion of internal tie rods, damaged bushings, failure of tensioner seals

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