CN207454169U - A kind of linkage rod type hydraulic motor of anti-down oil suction - Google Patents

A kind of linkage rod type hydraulic motor of anti-down oil suction Download PDF

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Publication number
CN207454169U
CN207454169U CN201721482046.7U CN201721482046U CN207454169U CN 207454169 U CN207454169 U CN 207454169U CN 201721482046 U CN201721482046 U CN 201721482046U CN 207454169 U CN207454169 U CN 207454169U
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oil
hydraulic motor
logical
plunger
auxiliary
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CN201721482046.7U
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周莉刚
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NINGBO OUYI HYDRAULICS CO Ltd
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NINGBO OUYI HYDRAULICS CO Ltd
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Abstract

The utility model is related to a kind of linkage rod type hydraulic motors of anti-down oil suction, include housing, logical food tray, oil distribution casing, plunger connecting rod component and bent axle, oil inlet and oil return opening are provided on wherein logical food tray, it is characterized in that logical food tray is equipped with the first auxiliary oil way for connecting the oil inlet and oil return opening, control mouth is equipped in first auxiliary oil way, and the check valve for coordinating with control mouth and tapping pressure oil only being permitted to flow to from oil return opening oil inlet in hydraulic motor stop motion is installed.When hydraulic motor shuts down, the hydraulic fluid pressure of oil return opening is more than the hydraulic fluid pressure of oil inlet, at this moment check valve is opened, the hydraulic oil of oil return opening is made to enter oil inlet, so as to compensate for the required hydraulic oil of rotation occurred due to inertia, the generation of suck-back oil phenomenon can be effectively prevented, so as to avoid the generation of cavitation, it is ensured that hydraulic motor can work stably in a long term.

Description

A kind of linkage rod type hydraulic motor of anti-down oil suction
Technical field
The utility model is related to a kind of hydraulic motors, refer specifically to a kind of linkage rod type hydraulic motor of anti-down oil suction.
Background technology
Linkage rod type hydraulic motor is a kind of Hydraulic Elements by hydraulic energy transfer for mechanical energy, it includes housing, logical oil Disk, oil distribution casing, plunger-link assembly and bent axle, wherein, oil inlet and oil return opening are provided on logical food tray, plunger-link assembly is Odd number is radially evenly distributed on the circumference of bent axle respectively, and the plunger in plunger-link assembly passes through ball-and-socket and connecting rod The connection of bulb phase flexural pivot, the cylindrical surface of connecting rod bottom is connected with the eccentric wheel of bent axle, and bent axle is supported on housing by bearing With in capping, one end of bent axle is connected with oil distribution casing, the other end then be used for band dynamic load.In use, when oil inlet is passed through high pressure When oily, oil return opening is connected with oil return box, and pressure oil flows at the oil inlet of logical food tray, through oil distribution casing, the in vivo oil circuit of shell Plunger head is acted on, the hydraulic coupling of the pressure oil resolves into an effect that eccentric wheel center is directed toward along link centerline Power, the tangential force of the active force generate torque to the pivot of bent axle, bent axle are made to be rotated around bent axle pivot, realizes hydraulic pressure The purpose of mechanical energy can be converted into.
In the above-mentioned course of work, when the extraneous switching valve for supplying to flow back in road changes to middle position, oil inlet is closed, at this moment liquid For pressure motor since inertia is rotated further, hydraulic motor oil return returns to fuel tank by oil return opening, at this time at the oil inlet of hydraulic motor Vacuum chamber can be formed, this strand of vacuum power can cause between the bulb of connecting rod and the ball-and-socket of plunger, connecting rod bottom cylindrical surface and bent axle Eccentric wheel between disengage, so as to draw the hydraulic oil in housing cavity, if drain mast is not inserted under pasta at this time, once Fluid in housing cavity is sucked, and air will enter the oil inlet of hydraulic motor.When so starting hydraulic motor next time, Entire hydraulic system can be mixed into air, ultimately result in cavitation erosion.Furthermore it is unlubricated between the ball-and-socket of plunger and the bulb of connecting rod, two Contact surface between person is prone to wear out, and also easily causes leakage, influences the mechanical efficiency and volumetric efficiency of complete machine.
Utility model content
Technical problem to be solved in the utility model is the present situation for the prior art, and providing a kind of can prevent that cavitation erosion is existing As the linkage rod type hydraulic motor of the anti-down oil suction of generation.
Technical solution is used by the utility model solves above-mentioned technical problem:A kind of connecting-rod type hydraulic of anti-down oil suction Motor includes housing, logical food tray, oil distribution casing, plunger-link assembly and bent axle, wherein being provided with oil inlet on the logical food tray And oil return opening, the plunger-link assembly are odd number, are radially evenly distributed on respectively on the circumference of bent axle, the column Plunger in plug-link assembly is connected by the bulb phase flexural pivot of ball-and-socket and connecting rod, is characterized in that:The logical food tray, which is equipped with, to be connected Lead to the first auxiliary oil way of the oil inlet and oil return opening, control mouth is equipped in first auxiliary oil way, and is equipped with and controls The check valve that donsole coordinates and tapping pressure oil is only permitted to flow to oil inlet from oil return opening in hydraulic motor stop motion.
For the ease of processing and assembling, in said program, it is further preferred that, the one of first auxiliary oil way Through the side wall for leading to food tray, one end aperture of first auxiliary oil way is more than the other end aperture of the first auxiliary oil way, and will at end The one end of first auxiliary oil way is designed to threaded hole, and the check valve includes steel ball, is connected in the threaded hole Logical whelk nail and positioned at logical whelk nail steel ball between logical lubricating pad piece, the logical lubricating pad on piece be equipped with deviate from center Through hole, the steel ball can lead between lubricating pad piece and control mouth and move at this.
It in above-mentioned preferred embodiment, preferably carries, gasket is equipped between the logical lubricating pad piece and logical whelk nail, to prevent letting out Leakage.The through hole of the logical lubricating pad on piece can have multiple simultaneously, it is ensured that the smooth flow of hydraulic oil when check valve is opened.
In the above embodiments, it is further improved to be, the second auxiliary oil way is provided on the plunger, second auxiliary The top surface of plunger is run through in the upper end of oil circuit, and the ball-and-socket of plunger is run through in the lower end of second auxiliary oil way.So as to hydraulic motor work post In the process, pressure oil can be made to enter in the friction pair between bulb and ball-and-socket, to extend the service life of the two, and be conducive to Improve the mechanical efficiency and volumetric efficiency of complete machine.
In order to further improve said effect, it is preferred that the lower end of second auxiliary oil way adjacent to ball-and-socket and bulb it Between friction pair midpoint.The second auxiliary oil way can be designed with a plurality of simultaneously, and concentric uniform is distributed.It can also be described second Groove is also provided on plunger ball-and-socket at auxiliary oil way lower end.
Compared with prior art, since the utility model is additionally arranged the first auxiliary oil way and check valve, and when motor is unidirectional During normal operation, since the hydraulic fluid pressure of oil inlet is more than the hydraulic fluid pressure of oil return opening, closed check valve, the liquid of oil inlet Pressure oil will not be directly entered oil return opening, and when shutting down, the hydraulic fluid pressure of oil return opening is more than the hydraulic oil of oil inlet Pressure, at this moment check valve opening, makes the hydraulic oil of oil return opening enter oil inlet, so as to compensate for the rotation occurred due to inertia Required hydraulic oil can be effectively prevented the generation of suck-back oil phenomenon, so as to avoid the generation of cavitation, it is ensured that liquid Pressure motor can work stably in a long term.
Description of the drawings
Fig. 1 is the partial sectional view of the utility model embodiment;
Fig. 2 is the enlarged drawing at oil distribution casing section view in Fig. 1;
Fig. 3 is the top view of plunger in Fig. 1.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing embodiment.
As shown in Figure 1 to Figure 3, linkage rod type hydraulic motor includes housing 1, logical food tray 2, oil distribution casing, plunger-link assembly And bent axle, wherein be provided with oil inlet A and oil return opening B on logical food tray 2, the plunger-link assembly is odd number, in the present embodiment Elect five as, be radially evenly distributed on respectively on the circumference of bent axle, the plunger 3 in plunger-link assembly by ball-and-socket with The bulb phase flexural pivot connection of connecting rod 4, the cylindrical surface of 4 bottom of connecting rod are connected with the eccentric wheel of bent axle, and bent axle is supported by bearing In housing 1 and capping, one end of bent axle is connected with oil distribution casing, and the other end is then used for band dynamic load, i.e. housing 1, oil distribution casing, company Bar 4 and crankshaft structure and operation principle are the prior art, and explanation is no longer developed in details herein.
In the present embodiment, the first auxiliary of connection oil inlet A and oil return opening B is mainly had additional on above-mentioned logical food tray 2 Oil circuit 21 is equipped with control mouth in first auxiliary oil way 21, and be equipped with control mouth coordinate and in hydraulic motor stop motion When only tapping pressure oil is permitted to flow to the check valve 5 of oil inlet A from oil return opening B.For the ease of installing and processing, it is preferred that this first The side wall of logical food tray 2 is run through in one end of auxiliary oil way 21, and one end aperture of first auxiliary oil way 21 is more than the first auxiliary oil way 21 other end aperture, and the one end of first auxiliary oil way is designed to threaded hole, and carried out with plug 6 and sealing ring 7 Closure, and check valve uses such as lower structure:Include steel ball 51, the logical whelk being connected in threaded hole nail 52 and positioned at logical oil Logical lubricating pad piece 53 between screw and steel ball, logical lubricating pad piece 53 is equipped with the through hole at the center that deviates from, in order to ensure check valve 5 is opened The smooth outflow of hydraulic oil when opening, the via design have multiple.Steel ball 51 can lead between lubricating pad piece 53 and control mouth and move at this. Simultaneously in order to have preferable sealing effect, lead between lubricating pad piece 53 and logical whelk nail 52 and be equipped with gasket 54.
It is further improved to be in the present embodiment, the second auxiliary oil way 31 is provided on plunger 3, second auxiliary oil way The top surface of plunger 3 is run through in 31 upper end, and the ball-and-socket of plunger is run through in the lower end of second auxiliary oil way 31.So in hydraulic motor work During work, pressure oil can be entered in the friction pair between bulb and ball-and-socket, can prevent the abrasion of the two, and also acts as drop Low oil temperature, the effect for reducing noise.In order to further improve said effect, it is preferred that the lower end of second auxiliary oil way 31 Neighbouring friction pair midpoint between ball-and-socket and bulb, and second auxiliary oil way 31 has a plurality of, and the present embodiment is concentric uniform Distribution four, refers to Fig. 3.Simultaneously in order to store more fluid, on the plunger ball-and-socket at the second auxiliary oil way lower end Also it is provided with groove 32.

Claims (8)

1. a kind of linkage rod type hydraulic motor of anti-down oil suction includes housing, logical food tray, oil distribution casing, plunger-link assembly and song Axis, wherein being provided with oil inlet and oil return opening on the logical food tray, the plunger-link assembly is odd number, respectively radially It is evenly distributed on the circumference of bent axle, the plunger in the plunger-link assembly is connected by the bulb phase flexural pivot of ball-and-socket and connecting rod It connects, is characterized in that:The logical food tray is equipped with the first auxiliary oil way for connecting the oil inlet and oil return opening, in first auxiliary Control mouth is equipped in oil circuit, and is equipped with and is coordinated with control mouth and tapping pressure oil is only permitted in hydraulic motor stop motion from oil return Mouth flows to the check valve of oil inlet.
2. the linkage rod type hydraulic motor of anti-down oil suction according to claim 1, it is characterised in that:The first auxiliary oil The side wall of logical food tray is run through in the one end on road, and one end aperture of first auxiliary oil way is more than another stomidium of the first auxiliary oil way Footpath, and the one end of first auxiliary oil way is designed to threaded hole, the check valve includes steel ball, is connected to the spiral shell Logical whelk nail in pit and the logical lubricating pad piece between logical whelk nail and steel ball, the logical lubricating pad on piece are equipped with and deviate from The through hole at center, the steel ball can lead between lubricating pad piece and control mouth and move at this.
3. the linkage rod type hydraulic motor of anti-down oil suction according to claim 2, it is characterised in that:The logical lubricating pad piece and Gasket is equipped between logical whelk nail.
4. the linkage rod type hydraulic motor of anti-down oil suction according to claim 2, it is characterised in that:The logical lubricating pad on piece Through hole have it is multiple.
5. the linkage rod type hydraulic motor of the anti-down oil suction according to Claims 1-4 any claim, it is characterised in that: The second auxiliary oil way is provided on the plunger, the top surface of plunger is run through in the upper end of second auxiliary oil way, the second auxiliary oil The ball-and-socket of plunger is run through in the lower end on road.
6. the linkage rod type hydraulic motor of anti-down oil suction according to claim 5, it is characterised in that:Second auxiliary oil way Friction pair midpoint of the lower end between ball-and-socket and bulb.
7. the linkage rod type hydraulic motor of anti-down oil suction according to claim 5, it is characterised in that:Second auxiliary oil way Have it is a plurality of, and concentric uniform be distributed.
8. the linkage rod type hydraulic motor of anti-down oil suction according to claim 5, it is characterised in that:Second auxiliary oil way Groove is also provided on plunger ball-and-socket at lower end.
CN201721482046.7U 2017-11-08 2017-11-08 A kind of linkage rod type hydraulic motor of anti-down oil suction Active CN207454169U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721482046.7U CN207454169U (en) 2017-11-08 2017-11-08 A kind of linkage rod type hydraulic motor of anti-down oil suction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721482046.7U CN207454169U (en) 2017-11-08 2017-11-08 A kind of linkage rod type hydraulic motor of anti-down oil suction

Publications (1)

Publication Number Publication Date
CN207454169U true CN207454169U (en) 2018-06-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201721482046.7U Active CN207454169U (en) 2017-11-08 2017-11-08 A kind of linkage rod type hydraulic motor of anti-down oil suction

Country Status (1)

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CN (1) CN207454169U (en)

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