Large velocity ratio marine gearbox

Abstract

The invention discloses a large velocity ratio marine gearbox, which mainly comprises an input component, an ahead running shaft component, a reversing shaft component, an intermediate shaft component, an output component and a box body component, wherein the input shaft of the input component is provided with an input gear by shrinkage fit, the input gear meshes with an ahead running driving gear which is arranged at the ahead running shaft of the ahead running shaft component by shrinkage fit, the ahead running shaft of the ahead running shaft component is equipped with an ahead running clutch with an ahead running clutch shell gear; the reversing shaft component comprises a reversing shaft and a reversing clutch with a reversing clutch shell gear; the ahead running shaft and the reversing shaft are also respectively sleeved with an ahead running driving gear and a reversing driving gear connected with the ahead running clutch and the reversing clutch, and the above-mentioned ahead running driving gear and reversing driving gear respectively mesh with an intermediate transmission gear fixedly connected with the intermediate shaft of the intermediate shaft component; the intermediate shaft is fixedly connected with an intermediate driving gear meshed with the output gear which is arranged on the output shaft of the output component by shrinkage fit; the intermediate shaft is of a hollow shaft, and the hollow intermediate shaft is sleeved on the input shaft and supported by bearings. The large velocity ratio marine gearbox provided by the invention has the characteristics that gear meshing is improved effectively, assembly and maintenance are convenient, and net weight can be reduced by 20-30% according to different speed reduction ratios.

Description

technical field [0001] The invention relates to a gear transmission device with a large speed ratio, which is mainly suitable for marine gearboxes with reverse and forward clutch functions and a large reduction ratio (13-25:1), and belongs to the field of marine power transmission systems. Background technique [0002] At present, it is known from the relevant published technical information channels that there are mainly two types of transmission structures of marine gearboxes related to the present invention. One type of structure adopts two-stage deceleration when driving along, and three pairs of gears mesh when reversing. The total reduction ratio is large, so the single-stage reduction ratio is also large, the gear meshing quality is not good, and the overall volume and weight are large; the clutch is on the high-speed shaft. Although the clutch can be designed to be small, it is not easy to assemble and disassemble, especially the reduction ratio. If it exceeds 16:1, ...

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Problems solved by technology

[0002] At present, it is known from the relevant published technical information channels that there are mainly two types of transmission structures of marine gearboxes related to the present invention. One type of structure adopts two-stage deceleration when driving along, and three pairs of gears mesh when reversing. The total reduction ratio is large, so the single-stage reduction ratio is also large, the gear meshing quality is not good, and the overall volume and weight are large; the clutch is on the high-speed shaft. Although the clutch can be designed to be small, it is not easy to assemble and disassemble, especially the reduction ratio. More than 16:1, the transmission capacity decays rapidly; the clutch has a larger torque on the second stage, which greatly increases the product cost

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