Tensioning apparatus for scraper plate material delivering system, and scraper plate material delivering system and paving machine thereof

Abstract

The invention relates to a tensioning apparatus for a scraper plate material delivering system. The tensioning apparatus comprises a guide support; a tensioning thread sleeve, which is perpendicular to the length direction of the guide support; a tensioning screw, which is in screw-thread fit with the tensioning thread sleeve; and tensioning wheels, which are arranged on two sides of the guide support. The tensioning thread sleeve is axially limited on the guide support and matches with the unthreaded hole of the guide support in a loose fit mode. The head of the tensioning screw is abutted onthe rear end beam of a vehicle frame. The guide support is slidingly arranged on the support seat of the vehicle frame. The bottom of the guide support is provided with a guide slide block. Two sidesof the guide slide block are in loose fit with lateral surfaces of the support seat of the vehicle frame. By adopting a structure having a single screw and a single guide slide block, the problem that the tensioning screw of a rear-mounted tensioning apparatus is too long and is difficult to disassemble is solved; at the same time, the problem that the tensioning screw is easily deformed under the action of alternating bending stress is also solved; the adaptability of the tensioning apparatus is effectively improved, and the material delivering efficiency of the scraper plate material delivering system is improved.

Description

technical field [0001] The invention belongs to the technical field of road surface construction equipment, and in particular relates to a tensioning device for a scraper conveying system, a scraper conveying system and a paver thereof. Background technique [0002] Paver is a commonly used pavement construction equipment, mainly used for paving various materials on the road base and surface. The scraper conveying system is the key component to ensure the flow of materials during the paver construction process. It is mainly composed of scraper driving device, scraper conveyor chain, scraper tensioning device, scraper bottom plate and guard plate assembly. The tensioning mechanism of the scraper conveyor system plays the role of tensioning and guiding the scraper conveyor chain. [0003] The scraper tensioning device is an important part of the scraper conveying system, and there are screw-type tensioning devices and cylinder-type tensioning devices. The screw type tensioni...

AI Technical Summary

Problems solved by technology

Among them, the patents CN204212031U and CN202245121U are front-mounted twin-screw and double-guide block tensioning devices, and their structures are as follows: figure 1 As shown, the tensioning screw A and the side guide block B and the middle guide block C are arranged left and right. This structure has good stability and is easy to operate in tension. The disadvantage is that the tensioning screw A is exposed to the outside of the frame, and it is easy to adhere to asphalt, which is difficult to clean. And for the processing accuracy requirement of vehicle frame is high; Patent CN102837935A has announced a kind of post-mounted twin-screw rod double-guide block tensioning device, and its structure is as follows figure 2 As shown, the double guide block guides the double screw tension support, and the structural stability is good. The tension screw A is arranged under the front cover to ensure the cleanliness of the screw, and the machining accuracy of the frame is considered. After the screw is close to the frame An adjustment nut block E is installed at the end beam, but the tension screw A needs to be inserted into the rear end beam 601 of the frame after passing through the hole of the tension shaft D. The length of the tension screw A is too long. A large operating space is reserved between the front end beam 602 of the frame, otherwise it is difficult to disassemble the screw rod on the vehicle, and the double nut block acts at the same time to support, thread tension and gap adjustment. The processing accuracy is high, and the installation requirements high

The tensioning device with double-screw and double-guide block structure has a reliable and stable structure. The disadvantage is that it requires high processing precision for the frame, and the tension of the two tensioning screws is inconsistent, resulting in different tensions on the left and right scraper chains, resulting in front and rear sprockets. The offset aggravates the wear between the guide block and the side plate 604 of the frame, the chain and the sprocket, and the size of the middle guide block is limited by the size of the middle chain guard cannot be the narrowest, which affects the conveying efficiency of the scraper conveyor system , which intensifies the accumulation of the mixture near the middle guard plate and the longitudinal band segregation

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