Rolling-friction tilt cylinder hydraulic motor

Abstract

The invention discloses a rolling-friction tilt cylinder hydraulic motor comprising a housing, a rear cover hermetically connected with the housing, an oil passing disk fixedly mounted on the rear cover, a crankshaft, a bearing sleeve, tilt cylinders and hollow plungers, wherein the crankshaft, the bearing sleeves, the tilt cylinders and the hollow plungers are mounted in an accommodating space formed after the housing is connected with the rear cover; both ends of the crankshaft are respectively supported on the housing and the rear cover respectively through roller bearings; the bearing sleeve supports on an eccentric crankshaft segment of the crankshaft through a roller; one end, located on the rear cover, of the crankshaft is connected with an oil distribution disk through a universal joint pin; the number of the tilt cylinders is odd, both ends of each tilt cylinder are respectively supported on the housing and the rear cover respectively through inner ring-free needle bearings, and a cylinder body of each tilt cylinder is internally slidingly connected with one hollow plunger; each hollow plunger is hinged on the bearing sleeve through a spherical surface. The both ends of each tilt cylinder are supported by the inner ring-free needle bearings, so that the torque-starting efficiency and the mechanical efficiency are improved due to rolling friction, and cooperative abrasion of the both ends of each tilt cylinder is reduced so as to ensure a parallelism error of the tilt cylinders and the crankshaft.

Description

technical field [0001] The invention relates to a hydraulic motor, in particular to a rolling friction swing cylinder hydraulic motor. Background technique [0002] As the main component of the high torque hydraulic system, the quality of the radial piston hydraulic motor directly affects the mechanical working efficiency under actual working conditions. It can work stably and reliably at a very low speed, and can be directly connected with the working mechanism that needs low-level operation, which simplifies the structure of the whole machine, and also has the advantages of high efficiency and long life. It is used in hydraulic systems of light industrial machinery, construction machinery, mining machinery, lifting and transportation machinery, ship deck machinery and agricultural machinery. [0003] The swing cylinder hydraulic motor is a kind of radial piston motor. It not only has the advantages of the radial piston motor, but also has its own characteristics in struct...

AI Technical Summary

Problems solved by technology

[0004] An existing swing cylinder hydraulic motor includes a housing, a rear cover sealedly connected with the housing, an oil pan fixedly installed on the rear cover, and a crankshaft installed in the accommodation space after the housing and the rear cover are connected. , oil distribution plate, swing cylinder and hollow plunger. One of the crankshaft is connected with an oil distribution plate that rotates with it. The swing cylinder is supported on the housing through a rigid bushing. When using this structure to install the swing cylinder, the starting torque, The mechanical efficiency is relatively low, and the matching wear at both ends of the swing cylinder is relatively large, which easily causes an increase in the parallelism error between the swing cylinder and the crankshaft

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