Linkage rod type hydraulic motor

Abstract

A link-type oil hydraulic motor is improved on the basis of the original shell, the shaft-distribution-oil ware, the rotating shaft, and the plunger piston-link assembly, etc., namely that the rotating shaft is shaped into direct-axis and is eccentrically arranged in the shell. At the same time, rotors and turrets which are arranged outside the rotors and borne in the shell by the second group of the roller bearings are also suited on the rotating shaft. Pluralities of plunger piston cavities are opened on the circumference interface of the rotors to hold relative plunger pistons and links which are connected by a spherical hinge. A rotor assembly which is concentrically arranged with the shell is fixed on the turret. The exterior of the other end of the links contacts with the interior of the turret respectively. In addition, a plurality of flow passages which make the oil distributing hole get through relative plunger piston cavities are arranged on the rotating shaft. Since the second group of the roller bearings is far away from the center of the rotating shaft, enough installation space and good heat dispersion can be gained. The choice of roller bearing in large specification of the present invention provides high starting torque and the characters of strong bearing ability, credible work and long service life.

Description

technical field [0001] The invention relates to a hydraulic motor, in particular to a connecting rod hydraulic motor. Background technique [0002] A radial crankshaft connecting rod hydraulic motor with hydrostatically balanced sliding bearings includes a housing consisting of a cover and housing, an oil distributor with multiple oil distribution holes, a plunger cylinder, a plunger-connecting rod assembly and a crankshaft, Among them, the oil distributor is divided into plane oil distribution structure and shaft oil distribution structure. The crankshaft is supported in the housing and the cover through bearings. One end of the crankshaft rotates synchronously with the oil distribution plate in the plane oil distribution structure or the oil distribution shaft in the shaft oil distribution structure through a double-headed key, and the other end is used to drive the load; The plunger cylinders are distributed in odd numbers, and they are evenly arranged radially on the ra...

AI Technical Summary

Problems solved by technology

But in the process of use, it is found that the use of this rolling friction structure can better overcome the disadvantages of the radial crankshaft connecting rod hydraulic motor using static pressure balance sliding bearings, but it also brings the following problems: Since the crankshaft, bearing sleeve and roller are in the center of the hydraulic motor, and the plunger and connecting rod are distributed on the circumference of the crankshaft, the radial dimension of the rolling bearing unit cannot be increased arbitrarily, and can only be limited within a certain range. within, thus limiting the load carrying capacity of the rolling bearing unit

Furthermore, the shaft flow distribution structure of the existing crankshaft-connecting rod hydraulic motor, its oil passage structure and oil distribution structure are distributed along the axial direction, as edited by Lei Tianjue, published by Beijing Institute of Technology Press in December 1998 The shaft oil distribution structure disclosed on pages 505 to 507 and Figure 12.4-3 of the "New Hydraulic Engineering Handbook" of "New Hydraulic Engineering Handbook", thus causing the defect that the axial size of the oil distributor is too large

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