Linkage rod type hydraulic motor

Abstract

A connecting rod hydraulic motor, which is improved on the basis of the original housing, oil distributor, rotating shaft and plunger-connecting rod assembly, that is, the rotating shaft is in the shape of a straight shaft and placed eccentrically in the housing, and at the same time The rotating shaft is also fitted with a rotor and a turret that is located outside the rotor and is supported in the casing by a second set of roller bearings. A plurality of plunger cavities are opened on the circumferential surface of the rotor to accommodate the corresponding ball-jointed columns. The turret is fixed with a rotating sleeve concentric with the casing, and the outer surface of the other end of each connecting rod is in contact with the inner surface of the rotating sleeve respectively. A plurality of flow passages are provided so that the oil distribution hole on the oil distributor communicates with the corresponding plunger cavity. Because the second group of roller bearings is far away from the center of the rotating shaft, it has sufficient installation space and better heat dissipation performance, so that the present invention can choose roller bearings with larger specifications, so that it has both higher starting torque and It has the characteristics of strong bearing capacity, reliable operation 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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