CN111502904A

CN111502904A - Oil distribution mechanism of radial plunger hydraulic motor

Info

Publication number: CN111502904A
Application number: CN202010420410.7A
Authority: CN
Inventors: 何作勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2020-08-07

Abstract

The invention relates to the technical field of hydraulic motors and discloses an oil distribution mechanism of a radial plunger hydraulic motor. This radial plunger hydraulic motor's joins in marriage oily mechanism, circulation route through control valve control hydraulic oil, the connected state of control valve corresponds with the rotation state of output shaft through the bent axle simultaneously, the realization is to the control of plunger and hydraulic oil, the more stable high efficiency of operation, secondly the plunger directly communicates with oil pocket A or oil pocket B, the resistance that hydraulic oil flows is littleer, consequently, the efficiency of doing work of hydraulic oil is higher, rated power is down, the requirement to hydraulic oil pressure has been reduced, the running cost is reduced, there is not the change of flow area simultaneously, the noise that hydraulic oil flows is littleer, whole also more stable, on the other hand, the cooperation of depression bar and control valve, also littleer to the requirement of progress.

Description

Oil distribution mechanism of radial plunger hydraulic motor

Technical Field

The invention relates to the technical field of hydraulic motors, in particular to an oil distribution mechanism of a radial plunger hydraulic motor.

Background

The oil distribution mode of the hydraulic motor has two modes of shaft oil distribution and end oil distribution, wherein in the mode of shaft oil distribution, gaps which cannot be eliminated exist between an oil inlet cavity and an oil return cavity, the volume leakage is more, and the shaft is eccentric in a rear cover after being subjected to unbalanced hydraulic radial force action, so that the leakage amount can be further increased, in order to reduce the volume leakage, the oil distribution gap needs to be reduced, but because the oil distribution shaft is longer, the oil distribution shaft is sensitive to temperature change and is easy to generate thermal shock, the oil distribution shaft is blocked, and therefore the end oil distribution has the tendency of replacing the shaft oil distribution.

Referring to fig. 6, in a common end oil distribution structure, an oil distribution disc rotates along with a shaft, channels facing different directions in the oil distribution disc sequentially circulate and are communicated with a hydraulic oil channel of a casing, and then an oil inlet/outlet chamber A, B is sequentially communicated with the hydraulic oil of the casing, so as to realize supply and discharge of primary hydraulic oil.

Secondly, the passageway of the oil structure is joined in marriage to current terminal surface comprises a plurality of apertures, on the one hand, under the prerequisite of same flow area, the hole number is more, the fluid resistance is big, therefore, the porous circulation that constitutes can further increase the resistance, reduce hydraulic efficiency, simultaneously, because rotation and cooperation relation, the fluid area in every hole is continuous change, in the condition of little flow area, the fluid is fast, the erosive power to joining in marriage the food tray is big more, also can reduce the life who joins in marriage the oil structure, on the other hand, also improve the requirement to assembly and cooperation precision, can further reduce efficiency if the precision is lower.

Disclosure of Invention

Aiming at the defects of the background technology, the invention provides the technical scheme of the oil distribution mechanism of the radial plunger hydraulic motor, which has the advantages of stable operation, high efficiency and the like and solves the problems in the background technology.

The invention provides the following technical scheme: the oil distribution mechanism comprises a shell, an oil cavity A and an oil cavity B, wherein an oil way is arranged in the shell, the shell is communicated with a plunger, the oil cavity A and the oil cavity B are communicated with a hydraulic device, the inner wall of the shell is movably connected with a pressing sheet capable of moving in the radial direction, the pressing sheet is movably connected with a crankshaft, the pressing sheet is movably connected with a pressing rod, the pressing rod is movably connected with a control valve, and the control valve can be switched to be communicated with the oil cavity A and the plunger or the oil cavity B and.

Preferably, an amplifying lever is arranged between the control valve and the pressure lever, one end of the amplifying lever is hinged with the shell, the other end of the amplifying lever is in transmission connection with the control valve, and the pressure lever jacks up the amplifying lever.

Preferably, the preforming comprises the crisscross arc of two dog teeth, the arc is articulated with the inner wall of preforming, and two arcs are spacing each other towards one side of axis, the protruding can promote the preforming rotation of bent axle, the inboard of depression bar is equipped with the semicylinder with the preforming is coaxial, the middle part of depression bar and preforming is tangent.

Preferably, the position where the pressing sheet is hinged with the shell is provided with a limiting device with the largest rotating angle, the pressing sheet is tangent to the inner wall of the shell at the hinged position, and the diameter of the pressing sheet is gradually reduced from the hinged position to the middle.

Preferably, the inner wall of the shell is movably connected with the pressing sheet through a mounting ring, and the protrusion of the crankshaft is attached to the inner wall of the mounting ring.

The invention has the following beneficial effects:

1. this radial plunger hydraulic motor's oil distribution mechanism controls the circulation route of hydraulic oil through the control valve, corresponds the connected state of control valve and the rotation state of output shaft (the flexible state of plunger promptly) through the bent axle simultaneously, realizes the control to plunger and hydraulic oil, and at this in-process, it is vice less to join in marriage oily structure friction, and whole is less to the consumption of energy, and secondly, the wearing and tearing that the friction produced also can not produce adverse effect to the normal operating of joining in marriage oily structure, and the operation is more stable.

2. This radial plunger hydraulic motor's oil distribution mechanism, the plunger directly communicates with oil pocket A or oil pocket B, for porous channel, hydraulic oil flow's resistance is littleer, consequently, hydraulic oil's work efficiency is higher, under the rated power, reduced the requirement to hydraulic oil pressure, reduce the running cost, do not have the change of flow area simultaneously, the noise that hydraulic oil flows is littleer, whole also more stable, on the other hand, the cooperation of depression bar and control valve, the requirement to the progress is also littleer.

Drawings

FIG. 1 is a schematic view of the present invention with the oil chamber B in communication and the oil chamber A closed;

FIG. 2 is a schematic perspective view of the present invention;

FIG. 3 is a schematic view of the present invention with the oil chamber A open and the oil chamber B closed;

FIG. 4 is a schematic diagram of a control structure according to the present invention;

FIG. 5 is a schematic view of the fit structure of the wafer of the present invention;

fig. 6 is a schematic diagram of a conventional oil distribution structure.

In the figure: 1. a housing; 2. an oil cavity A; 3. an oil chamber B; 4. a crankshaft; 5. tabletting; 6. a pressure lever; 7. a control valve; 8. an amplifying lever; 9. and (7) installing a ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, an oil distribution mechanism of a radial plunger hydraulic motor comprises a housing 1 with an oil passage therein for communicating a plunger, and an oil chamber a2 and an oil chamber B3 for communicating a hydraulic device, wherein the inner wall of the housing 1 is movably connected with a pressing plate 5 capable of moving radially, the pressing plate 5 is movably connected with a crankshaft 4, the crankshaft 4 and the pressing plate 5 are coaxial, the crankshaft 4 is in transmission connection with an output shaft of the motor, the crankshaft 4 rotates to intermittently trigger the pressing plate 5 to move, the pressing plate 5 is movably connected with a pressing rod 6, the pressing rod 6 is movably connected with a control valve 7, the control valve 7 can switch and communicate the oil chamber a2 and the plunger oil passage or the oil chamber B3 and the plunger oil passage, the oil distribution structure composed of the oil chamber a2, the oil chamber B3, the crankshaft 4, the pressing plate 5, the pressing rod 6 and the control valve 7 is at least two groups, and, ensuring continuous rotation of the rotor.

Wherein, an amplifying lever 8 is arranged between the control valve 7 and the pressure lever 6, the amplifying lever 8 amplifies the radial movement of the pressure lever 6, so that the pressure lever 6 moves in a small range, namely, the opening state of the control valve 7 can be controlled, on one hand, the control progress of the control valve 7 is improved, the control valve 7 is prevented from being positioned at the middle position, the function can not be realized, on the other hand, the displacement of the pressure lever 6 is small, the rotation resistance and the noise of the crankshaft 4 can also be reduced, one end of the amplifying lever 8 is hinged with the shell 1, the other end of the amplifying lever 8 is in transmission connection with the control valve 7, the control valve 7 consists of two valves, the communication of an oil cavity A2 and an oil cavity B3 is respectively controlled, the amplifying lever 8 is connected with the two valves through an upper connecting rod and a lower connecting rod, meanwhile, an inclined plane or a limiting block is arranged between the, the upper valve is closed, namely the oil chamber B3 is closed, the oil chamber A2 is communicated, otherwise, the oil chamber A2 is closed, the oil chamber B3 is communicated, the pressure lever 6 jacks up the amplifying lever 8, the radial movement of the pressure lever 6 controls the angle change of the amplifying lever 8, the opening state of the control valve 7 is controlled, and an elastic device is arranged between the amplifying lever 8 and the shell 1 to press the amplifying lever 8 downwards so as to reset the amplifying lever 8.

Wherein, preforming 5 comprises two crisscross arcs of dog tooth for 5 symmetries of preforming, the same effect of shape is realized to 4 arbitrary direction rotatory homoenergetic of bent axle, the arc is articulated with preforming 5's inner wall, and two arcs are spacing each other towards one side of axis, make two arc synchronous motion, depression bar 6's inboard is equipped with the semi-cylinder with the same axial of preforming 5, depression bar 6 and preforming 5's middle part is tangent, when preforming 5 removes, preforming 5 takes place to slide with depression bar 6, drive depression bar 6 radial movement.

Wherein, preforming 5 and 1 articulated position of casing are equipped with the stop device of present maximum corner, avoid 6 inclination of depression bar too big and bent axle 4 contacts, and articulated position preforming 5 is tangent with 1 inner wall of casing, avoid the radian sudden change to produce the striking, the noise is sent out, diameter from articulated position to the middle part of preforming 5 reduces gradually, preforming 5 is unsettled relatively, in order to avoid taking place to interfere, preforming 5 rotates in order to realize with bent axle 4's cooperation, the gradual change does benefit to the noise that reduces friction simultaneously.

Wherein, the inner wall of casing 1 passes through

collar

9 and 5 swing joint of preforming, and the lateral wall of collar 9 passes through bolt and 1 fixed connection of casing, and collar 9 is narrower relatively, does benefit to the installation of preforming 5 and depression bar 6, also reduces casing 1's the processing degree of difficulty simultaneously, and bent axle 4's outstanding and 9 inner wall laminating of collar are injectd bent axle 4, reduce the wearing and tearing that eccentric produced, avoid radially rocking the control accuracy that reduces control valve 7 simultaneously.

The working principle and the working process of the invention are as follows:

when oil enters the oil cavity A2 and oil exits the oil cavity B3, because the strokes of the two oil distribution structures are different, after hydraulic oil enters the oil cavity A2, one oil cavity A2 is always in a communicated state with the plunger to push the output shaft to transmit, so that the crankshaft 4 is driven to rotate, the crankshaft 4 rotates to trigger the pressing sheet 5 and the pressing rod 6 to move, the communicated state of the control valve 7 is changed, the oil cavity A2 in the oil distribution structure of the original plunger is disconnected from the plunger to be communicated, the oil cavity B3 is communicated with the plunger to discharge oil, the oil cavity A2 in the other oil distribution structure is communicated with the plunger to push the plunger to move, so that the output shaft rotates to drive the crankshaft 4 to rotate, the communicated state of the control valve 7 is changed, and the output shaft is.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a radial plunger hydraulic motor's oil distribution mechanism, establishes the oil circuit in order to communicate casing (1) of plunger and intercommunication hydraulic means's oil pocket A (2) and oil pocket B (3) including, its characterized in that: the inner wall swing joint of casing (1) has radially movable's preforming (5), preforming (5) swing joint has bent axle (4), preforming (5) swing joint has depression bar (6), depression bar (6) swing joint has control valve (7), changeable intercommunication oil pocket A (2) of control valve (7) and plunger oil circuit or oil pocket B (3) and plunger oil circuit.

2. The oil distribution mechanism of a radial piston hydraulic motor according to claim 1, characterized in that: an amplifying lever (8) is arranged between the control valve (7) and the pressure lever (6), one end of the amplifying lever (8) is hinged to the shell (1), the other end of the amplifying lever (8) is in transmission connection with the control valve (7), and the pressure lever (6) jacks up the amplifying lever (8).

3. The oil distribution mechanism of a radial piston hydraulic motor according to claim 1, characterized in that: preforming (5) comprise the crisscross arc of two dog teeth, the arc is articulated with the inner wall of preforming (5), and two arcs are spacing each other towards one side of axis, protruding can promote preforming (5) rotation of bent axle (4), the inboard of depression bar (6) is equipped with the semicircle post with the axial with preforming (5), the middle part of depression bar (6) and preforming (5) is tangent.

4. The oil distribution mechanism of a radial piston hydraulic motor according to claim 3, characterized in that: the hinge joint position of the pressing sheet (5) and the shell (1) is provided with a limiting device of the current maximum corner, the hinge joint position of the pressing sheet (5) is tangent to the inner wall of the shell (1), and the diameter of the pressing sheet (5) is gradually reduced from the hinge joint position to the middle.

5. The oil distribution mechanism of a radial piston hydraulic motor according to claim 3, characterized in that: the inner wall of the shell (1) is movably connected with the pressing sheet (5) through a mounting ring (9), and the protrusion of the crankshaft (4) is attached to the inner wall of the mounting ring (9).