Final transmission structure and bulldozer

Abstract

The invention relates to the technical field of bulldozers and particularly relates to a final transmission structure and a bulldozer. The final transmission structure comprises a brake unit and a transmission system, wherein the transmission system comprises a first-grade speed reducing unit, a second-grade speed reducing unit and a third-grade speed reducing unit; the first-grade speed reducing unit comprises two grades of straight tooth speed reducing structures; the second-grade speed reducing unit comprises a first planet row structure; the third-grade speed reducing unit comprises a second planet row structure; and the brake unit is connected with a transmission end of a motor. The invention further relates to the bulldozer. The bulldozer comprises an engine for providing power output, a shaft coupler and a pump connected with the motor; the shaft coupler is connected with the engine and the pump respectively; and the motor is connected with the final transmission structure. The brake unit, the first-grade speed reducing unit, the second-grade speed reducing unit and the third-grade speed reducing unit are used as a large module and the large module is fixedly connected with a main rack of the bulldozer, so that the bulldozer is convenient to dismount and maintain; and a relatively large transmission ratio can be realized and the transmission torque is stable, and the final transmission structure is economical and practical and is safe and reliable.

Description

technical field [0001] The invention relates to the technical field of bulldozers, in particular to a final drive structure and a bulldozer. Background technique [0002] There are two forms of bulldozer final drive: one is a two-stage spur gear final drive, and the other is a planetary gear final drive. The former is a traditional two-stage straight-tooth reduction structure, which is simple in structure, large in size, unbalanced in components, and cannot be modularized, making maintenance inconvenient. The latter planetary gear final drive generally adopts a two-stage deceleration structure at present, one is a straight tooth deceleration structure, and the other is a planetary row structure to increase the reduction ratio. The planetary row structure is located on the outside of the gear block and inside the gear block. Structure, the characteristic of this structure is that the gear modulus can be designed smaller, the structure size is small, the parts are balanced, a...

AI Technical Summary

Problems solved by technology

Although the patent "a bulldozer final drive structure (patent number: ZL201420384862.4)" has one-stage spur teeth and one-stage planetary gear transmission, it does not have a brake unit, and the planetary row is located inside the gear block, which cannot meet the requirements of high-horsepower hydrostatic pressure. Drive Bulldozer Requirements

Although the patent "two-stage planetary gear device for wheeled tractor final drive (patent number: ZL201520578489.0)" is a two-stage planetary gear reduction device, it has no brake, the input and output power are coaxial, and there is no one-stage spur gear to transmit power

Although the patent "a two-stage planetary final transmission assembly (patent number: ZL02142618.X)" is also a two-stage planetary gear reduction device and has a brake unit, the speed of the sun gear of the two planetary gears is the same, and the brake brakes the planet on the right The ring gear of the left planetary row and the ring gear of the left planetary row output power, and there is no first-stage straight tooth reduction structure, but this article is a three-stage reduction mechanism with a large reduction ratio, and the brake brakes the first-stage driving wheel. The first planetary row The rotation speed of the planet carrier and the sun gear of the second planet row are the same, but the structure is different

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