CN104612927B - Center hydraulic pump and drive mechanism thereof - Google Patents
Center hydraulic pump and drive mechanism thereof Download PDFInfo
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- CN104612927B CN104612927B CN201410831661.9A CN201410831661A CN104612927B CN 104612927 B CN104612927 B CN 104612927B CN 201410831661 A CN201410831661 A CN 201410831661A CN 104612927 B CN104612927 B CN 104612927B
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Abstract
A drive mechanism for a center hydraulic pump comprises a one-way drive motor, a transmission assembly and a piston. A motor shaft of the one-way drive motor is sleeved with first screw rods, first transmission gears are meshed with the first screw rods, second screw rods are sleeved with the first transmission gears, so that the first transmission gears and the second screw rods rotate coaxially, second transmission gears are meshed with the second screw rods, and therefore a two-stage gear/screw rod linkage structure is formed. Due to the fact that the two-stage gear/screw rod linkage structure is adopted, and the one-way drive motor is adopted as a power source, the whole drive mechanism is in the irreversible state under any condition, and the risk that due to the fact that recoil is caused by too high internal pressure, mechanical parts move reversely, and other related systems break down is effectively avoided. Meanwhile, the invention provides a center hydraulic pump with the drive mechanism.
Description
Technical field
The present invention relates to hydraulic pressure pump technical field, more particularly to a kind of central hydraulic pump and its drive mechanism.
Background technology
Hydraulic pump is the dynamical element of hydraulic system, is to drive by drive mechanism, sucks fluid from hydraulic oil container, is formed
Pressure oil is discharged, and delivers to a kind of element of executive component (such as hydraulic component).
Traditional drive mechanism easily causes recoil and reverses because hydraulic system internal pressure is too high, leads to component of machine
Drive in the wrong direction and cause other interconnected system collapses.
Content of the invention
Based on this it is necessary to be directed to the problems referred to above, provide a kind of central hydraulic pump that can prevent from reversing and its driving machine
Structure.
A kind of drive mechanism for central hydraulic pump, described central hydraulic pump has a low-pressure reservoir and a hydraulic oil
Case, this drive mechanism includes:
Unidirectional drive motor, has a motor shaft；
Transmission component, including the first screw rod, the first travelling gear, the second screw rod and the second travelling gear, described first spiral shell
On the motor shaft of described unidirectional drive motor, described first travelling gear is meshed rod set with described first screw rod, described
First travelling gear is sheathed on described second screw rod, so that described first travelling gear is rotated with described second screw coaxial,
Described second travelling gear is meshed with described second screw rod；And
Piston, can reciprocatingly move in low-pressure reservoir with the rotation of described second travelling gear, thus will be described low
In hydraulic oil press-in pressure-oil tank in force feed case.
Wherein in an embodiment, the motor shaft of described unidirectional drive motor is hex-shaped shaft.
Wherein in an embodiment, also include fixed support, described fixed support is used for supporting described unidirectional drive electricity
Machine, the first screw rod and the second screw rod, described fixed support has two half supports cooperating, and each described half support all has
There is circular arc side, matching in two circular arc sides, so that described fixed support is fastened on the lateral wall of described low-pressure reservoir.
Wherein in an embodiment, also include piston rod part, described piston rod part includes piston driving and turns
Disk and piston rod, the quantity of described piston driving rotating disk is two, passes through rotating disk pin between two described piston driving rotating disks
Connect, described piston driving rotating disk is additionally provided with turntable shaft, described piston driving rotating disk is arranged at institute by described turntable shaft
State in low-pressure reservoir, described turntable shaft stretches out in described low-pressure reservoir, described second travelling gear is sheathed on described turntable shaft,
One end of described piston rod is arranged on described rotating disk pin, and the other end is connected with described piston.
Wherein in an embodiment, described piston rod part also includes connecting rod base, and described connecting rod base is arranged at
On described piston, described connecting rod base is used for connecting described piston rod and described piston.
Wherein in an embodiment, the top of described piston is further opened with escape groove, described piston driving rotating disk, described
Piston rod and described connecting rod base are contained in described escape groove.
Wherein in an embodiment, the bottom of described piston is formed with poly- pressure pelvic cavity, and the bottom terminal ends of described piston are also
Offer drain recess.
Wherein in an embodiment, the low pressure oil that the diameter of described drain recess is equal in described low-pressure reservoir feeds back hole
Diameter.
Wherein in an embodiment, the side wall of described piston offers cannelure, described cannelure is arranged with close
Seal ring.
A kind of central hydraulic pump, comprising:
Support base；
Pressure-oil tank, is arranged on described support base, the side wall of described pressure-oil tank offers multiple spaced
High pressure oil outlet, the top of described pressure-oil tank offers first through hole；
Low-pressure reservoir, has first end and the second end, and described first end is inserted in described high pressure by described first through hole
In fuel tank, the end of described first end offers the second through hole, is additionally provided with dividing plate, described dividing plate is located in described low-pressure reservoir
Between described first end and described second end, described dividing plate offers third through-hole, the side wall of described low-pressure reservoir opens up
Multiple spaced low pressure oil are had to feed back hole；And
The drive mechanism for central hydraulic pump as described in any of the above one.
The above-mentioned drive mechanism for central hydraulic pump at least has the advantage that
On the motor shaft of unidirectional drive motor, the first travelling gear is meshed first screw sleeve with the first screw rod, the
One travelling gear is sheathed on the second screw rod so that the first travelling gear and the second screw coaxial rotate, the second travelling gear with
Second screw rod is meshed, thus forming two-stage gear/screw rod linkage structure.Due to using two-stage gear/screw rod linkage structure, and
And power source is unidirectional drive motor, so in any case, whole drive mechanism, all in irreversible state, effectively prevents
Cause recoil because internal pressure is too high, lead to component of machine to drive in the wrong direction and cause the danger of other interconnected systems collapse.
Above-mentioned central hydraulic pump, because applying above-mentioned drive mechanism, also has under any circumstance, whole driving
Mechanism, all in irreversible state, effectively prevent and causes recoil because internal pressure is too high, leads to component of machine to drive in the wrong direction and makes
Become the danger of other interconnected systems collapse.
Brief description
Fig. 1 is the assembling schematic diagram of the central hydraulic pump in an embodiment；
Fig. 2 is the decomposing schematic representation of central hydraulic pump shown in Fig. 1；
Fig. 3 is the decomposing schematic representation of Fig. 2 mesohigh fuel tank, low-pressure reservoir and switch module；
Fig. 4 is the partial sectional view after Fig. 3 assembling；
Fig. 5 is the assembling schematic diagram of Fig. 3 mesolow fuel tank and switch module；
Fig. 6 is the decomposing schematic representation of pressure regulation reversal valve in Fig. 1；
Fig. 7 is the structural representation of closure in Fig. 6；
Fig. 8 is the structural representation of valve element in Fig. 6；
Fig. 9 is the structural representation of valve pocket housing in Fig. 6；
Figure 10 is the structural representation of hydraulic tube connecting assembly in Fig. 1；
Figure 11 is the assembling schematic diagram of drive mechanism and low-pressure reservoir in Fig. 1；
Figure 12 is the decomposing schematic representation of Figure 11；
Figure 13 is the structural representation of closing cap in Figure 11；
Figure 14 is the decomposing schematic representation of Figure 11 mesolow fuel tank and piston rod part；
Figure 15 is the structural representation of piston driving rotating disk in Figure 14；
Figure 16 is the structural representation of piston in Figure 14.
Specific embodiment
Understandable for enabling the above objects, features and advantages of the present invention to become apparent from, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.Elaborate a lot of details in order to fully understand this in the following description
Bright.But the present invention can be much to implement different from alternate manner described here, and those skilled in the art can be not
Similar improvement is done, therefore the present invention is not embodied as being limited by following public in the case of running counter to intension of the present invention.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or can also there is element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or may be simultaneously present centering elements.Term as used herein " vertical ", " level ", " left ",
For illustrative purposes only, being not offered as is unique embodiment for " right " and similar statement.
Unless otherwise defined, all of technology used herein and scientific terminology and the technical field belonging to the present invention
The implication that technical staff is generally understood that is identical.The term being used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body is it is not intended that in limiting the present invention.Term as used herein " and/or " include one or more phases
The arbitrary and all of combination of the Listed Items closing.
Refer to Fig. 1 and Fig. 2, be the central hydraulic pump 10 in an embodiment, can achieve central hydraulic pump 10 phase
To independent control multiple hydraulic component (not shown).This central hydraulic pump 10 includes support base 110, pressure-oil tank 200, low pressure
Fuel tank 300, switch module 400, multiple pressure regulation reversal valve 500, hydraulic tube connecting assembly 600 and drive mechanism 700.
The generally circular structure of support base 110, support base 110 has been mainly used in supporting and fixation.Pressure-oil tank 200
It is arranged on support base 110 with pressure regulation reversal valve 500.Specifically, (figure is not can to open up accepting groove at the middle part of support base 110
Mark), pressure-oil tank 200 and pressure regulation reversal valve 500 are arranged in accepting groove (figure is not marked).It is further opened with support base 110 positioning
Hole 111, is arranged in location hole 111 by external fastening and for central hydraulic pump 10 to be fixed on external object (such as chassis)
On.External fastening can be the securing member such as screw or bolt, such as hex screw.
Specific in present embodiment, also including cover lid 120, cover lid 120 and cover on support base 110, cover covers 120 and props up
Support seat 110 is collectively forming a receiving space 130.Pressure-oil tank 200, low-pressure reservoir 300, switch module 400, multiple pressure regulation commutation
Valve 500 and drive mechanism 700 are all contained in this receiving space 130.It is provided with projection 121, support base on the end face of cover lid 120
110 edge surface offers the hole 112 matching with projection 121, and cover lid 120 is firmly covered on support base 110.
See also Fig. 3 and Fig. 4, pressure-oil tank 200 is arranged on support base 110.Pressure-oil tank 200 is an entirety
Stamping forming structure, higher pressure can be born in inside.Offer multiple spaced on the side wall of pressure-oil tank 200
High pressure oil outlet 210, the hydraulic oil in pressure-oil tank 200 is exported by high pressure oil outlet 210.The top of pressure-oil tank 200 is also opened
It is provided with first through hole 220, first through hole 220 supplies one end insertion of low-pressure reservoir 300, is additionally provided with female thread in first through hole 220.
Multiple radiating grooves 230, multiple radiating groove 230 interval settings are additionally provided with the outer surface of pressure-oil tank 200.Arrange dissipates
Hot groove 230 can increase area of dissipation, improves the radiating efficiency of pressure-oil tank 200.Specifically, each high pressure oil outlet 210
Between two neighboring radiating groove 230, the outer surface 240 that pressure-oil tank 200 offers high pressure oil outlet 210 is plane,
To be identical with hydraulic tube connecting assembly 600.
See also Fig. 5, low-pressure reservoir 300 is substantially cylindrical in shape structure.The material of the medial wall of low-pressure reservoir 300 is permissible
For steel, there is wear-resisting characteristic naturally it is also possible to have the material of wear-resisting property for other.The enclosure material of low-pressure reservoir 300
Can be aluminium alloy, to facilitate low-pressure reservoir 300 to radiate.Low-pressure reservoir 300 has first end 310 and the second end 320, first end
310 are inserted in pressure-oil tank 200 by first through hole 220.Low-pressure reservoir 300 is inserted in the first end in pressure-oil tank 200
310 side wall is provided with external screw thread, and external screw thread is screwed with the female thread of setting in the first through hole 220 of pressure-oil tank 200, real
Existing pressure-oil tank 200 is screwed with low-pressure reservoir 300, and assembling is simple and low-pressure reservoir 300 is difficult to take off from pressure-oil tank 200
From.The end of first end 310 offers the second through hole 311, and the hydraulic oil in low-pressure reservoir 300 is entered by the second through hole 311
In pressure-oil tank 200.Be additionally provided with dividing plate 330 in low-pressure reservoir 300, dividing plate 330 be located at first end 310 and the second end 320 it
Between, dividing plate 330 offers third through-hole (figure is not marked), is controlled the closure or openness of third through-hole by switch module 400.
Feed back hole 340 specific in present embodiment, the side wall of low-pressure reservoir 300 offering low pressure oil.Low pressure oil is returned
The quantity in defeated hole 340 is multiple, and what multiple low pressure oil feedback holes 340 were spaced is distributed in side wall.Low-pressure reservoir 300 offers low pressure
The outer surface 350 that oil feeds back hole 340 is plane, to be identical with hydraulic tube connecting assembly 600.Specifically, can also pass through
Feed back conduit 360 connection hydraulic tube connecting assembly 600 and low pressure oil feeds back hole 340, the one end feeding back conduit 360 is returned with low pressure oil
Defeated hole 340 connects, and the other end is connected with hydraulic tube connecting assembly 600.
It is pyramidal structure specific to the first end 310 that in present embodiment, low-pressure reservoir 300 inserts pressure-oil tank 200, shape
Become similar to funnel shaped, be conducive to guiding the hydraulic oil in low-pressure reservoir 300 smoothly and evenly into pressure-oil tank 200.
Ledge structure 370 is also formed with the outer surface of low-pressure reservoir 300, ledge structure 370 is abutted with the top of pressure-oil tank 200,
Low-pressure reservoir 300 is prevented to be entirely insertable pressure-oil tank 200.
See also Figure 13, the end at the second end 320 of low-pressure reservoir 300 is additionally provided with closing cap 380, seal closure
Lid 380 is used for forming a collecting chamber (not shown) with low-pressure reservoir 300.Specifically, spiral shell can be opened up on closing cap 380
Pit (not shown), opens up screwed hole 321 in the end at the second end 320 of low-pressure reservoir 300, then passes through trip bolt 390
Closing cap 380 is covered on the second end 320 of low-pressure reservoir 300.First semicircle is further opened with the end face of closing cap 380
Axis hole 381, the end at the second end 320 is further opened with the second semicircle axis hole 322, the first semicircle axis hole 381 and the second semicircle axis hole
322 match forms circular shaft hole.Specifically, radiating can also be arranged on the lateral wall of closing cap 380 and low-pressure reservoir 300
Groove (figure is not marked), with increasing heat radiation area, improves radiating efficiency.
See also Fig. 5, switch module 400 includes the isolation plunger tip 420 of elasticity setting, isolation plunger tip 420 can be opened
Open or close third through-hole.Specifically, switch module 400 includes coil tension spring 410, isolation plunger tip 420 and positioning volution 430.
One end of coil tension spring 410 is arranged at the first end 310 of low-pressure reservoir 300 and on the hole wall of the second through hole 311.Specifically
Ground, coil tension spring 410 can be fixedly installed on the hole wall of the second through hole 311.For example, the second through hole 311 of low-pressure reservoir 300
Hole wall extend in the hole, form positioning convex ring, coil tension spring 410 is fixedly installed on positioning convex ring.Positioning volution 430 is arranged
On the hole wall of third through-hole (figure is not marked), the effect of positioning volution 430 is upward stroke and the locking terminating isolation plunger tip 420
Isolation plunger tip 420.Certainly, in other embodiments it is also possible to omit positioning volution 430.
Isolation plunger tip 420 is arranged at the other end of coil tension spring 410 and can be turned on and off third through-hole (figure is not marked).Low
When oil in force feed case 300 is pressed into pressure-oil tank 200, hydraulic oil produces contention effect to isolation plunger tip 420, isolates plunger tip
420 force coil tension spring 410 to be compressed, and third through-hole (figure is not marked) is unlocked, and hydraulic oil is successively via third through-hole and second
Through hole 311 enters in pressure-oil tank 200 from low-pressure reservoir 300.After in hydraulic oil is completely into pressure-oil tank 200, hydraulic oil
The powerful static pressure in low-pressure reservoir 300 of static pressure in case 200, isolation plunger tip 420 is in coil tension spring 410 and hydraulic oil
Under the collective effect power of the hydraulic oil in case 200, recover to close third through-hole, the hydraulic oil within pressure-oil tank 200 cannot return
Stream enters in low-pressure reservoir 300.
See also Fig. 6 to Fig. 9, multiple pressure regulation reversal valves 500 are arranged at intervals on support base 110.Specifically, each
Pressure regulation reversal valve 500 includes motor 510, closure 520, valve element 530 and valve pocket housing 540.Motor 510 is high precisely servo electricity
Machine, motor 510 actuatable valve core 530 rotates in valve pocket housing 540.Closure 520 is covered on valve pocket housing 540, sealing
Lid 520 forms a confined space with valve pocket housing 540, and valve element 530 is contained in this confined space.Specifically, closure 520 leads to
Cross fastening screw 550 to be covered on valve pocket housing 540.For example, it is possible to screwed hole 521 be opened up on closure 520, in valve pocket shell
Screwed hole 541 is opened up on body 540, then fastening screw 550 is arranged in successively in two screwed holes and can cover closure 520
On valve pocket housing 540.
Specifically, ladder 542 can also be arranged on valve pocket housing 540, the one of valve pocket housing 540 faced by closure 520
Face arranges boss 523, and boss 523 is abutted against with ladder 542, to prevent closure 520 from excessively stretching in valve pocket housing 540.Rank
Offer draw-in groove 543 on the side wall of ladder 542, the side wall of boss 523 is provided with buckle 524, buckle 524 snaps in draw-in groove 543.
Draw-in groove 543 includes guiding groove 5431 and lock slots 5432, guiding groove 5431 and the angled setting of lock slots 5432, such as this enforcement
Arrange for right angle in mode.It is, of course, also possible to setting at an acute angle, prevent buckle 524 from deviating from easily to clasp buckle 524.Buckle
524 enter in lock slots 5432 via guiding groove 5431 to lock to boss 523.
The first passage 531 being interconnected and second channel 532 offered on the side wall of valve element 530, first passage 531 and
Second channel 532 passes through for hydraulic oil, and first passage 531 and second channel 532 are in l type structure.Also open on the side wall of valve element 530
It is provided with locating slot 533, locating slot 533 and first passage 531 and second channel 532 interval setting, that is, locating slot 533 and first is logical
Road 531 and the second through hole are not connection.The positioning plunger tip 536 of flexible setting is housed in locating slot 533.Specifically, receive
Have locating ring 534, retaining spring 535 and positioning plunger tip 536, the two ends of retaining spring 535 are connected to positioning plunger tip 536
On locating ring 534, locating ring 534 is fixedly installed on the bottom of locating slot 533.Certainly, in other embodiments, acceptable
Omit locating ring 534, directly retaining spring 535 is arranged at the bottom of locating slot 533.Locating slot 533 on valve element 530 is single
To closed circuit, even if so retaining spring 535 is not enough to compression positioning plunger tip 536, also cannot flow again after hydraulic oil arrival is closed circuit
?.
The high input voltage mouth of pipe 544, the High voltage output mouth of pipe 545 are arranged at intervals with the side wall of valve pocket housing 540 and reduce pressure back
The defeated mouth of pipe 546.The high input voltage mouth of pipe 544 is connected with high pressure oil outlet 210, for example can directly with high pressure oil outlet 210 phase
Connection.The High voltage output mouth of pipe 545 is used for being connected with hydraulic component, for example, can pass through hydraulic tube connecting assembly 600 and hydraulic pressure
Device is connected.Decompression is fed back the mouth of pipe 546 and is connected with low pressure oil feedback hole 340.Hydraulic tube connecting assembly for example can be passed through
600 feed back hole 340 with low pressure oil is connected.Stroke draw-in groove 547 is further opened with the medial wall of valve pocket housing 540, positions plunger tip
536 cocker enter in stroke draw-in groove 547.
When central hydraulic pump 10 is in running order, hydraulic oil is pressed in pressure-oil tank 200 from low-pressure reservoir 300,
And then enter pressure regulation reversal valve 500 from the high pressure oil outlet 210 of pressure-oil tank 200 via the high input voltage mouth of pipe 544, then by high pressure
In the output mouth of pipe 545 input hydraulic pressure device.When there being the sensor on a certain hydraulic component link to return beyond bound numerical value,
The valve element 530 of the pressure regulation reversal valve 500 that motor 510 driving is connected with this hydraulic component rotates, so that valve element 530 is with respect to tune
The whole high input voltage mouth of pipe 544, the High voltage output mouth of pipe 545 or decompression feed back the position of the mouth of pipe 546, and then adjust the stream of hydraulic oil
To, and the pressure regulation reversal valve 500 on other hydraulic component link is unaffected.
For example, when the sensor feedback of the hydraulic component on a certain link needs to pressurize, then motor 510 orders about and this hydraulic pressure
The valve element 530 of the pressure regulation reversal valve 500 that device is connected rotates, and makes the first passage 531 of valve element 530 and the height of valve pocket housing 540
The pressure input mouth of pipe 544 docks, and second channel 532 is docked with the High voltage output mouth of pipe 545, so that hydraulic oil is constantly from hydraulic oil
Hydraulic press is entered via the high input voltage mouth of pipe 544, second channel 532, first passage 531 and the High voltage output mouth of pipe 545 in case 200
In part.Now, decompression feeds back the mouth of pipe 546 and is positioned plunger tip 536 closing is in closed mode.
When the sensor feedback of the hydraulic component on a certain link needs to reduce pressure, then motor 510 orders about this pressure regulation reversal valve
500 valve element 530 rotates, and so that the second channel 532 of valve element 530 is docked with the High voltage output mouth of pipe 545 of valve pocket housing 540, the
One passage 531 with decompression feed back the mouth of pipe 546 dock, hydraulic oil in the presence of low-pressure reservoir 300, via height from hydraulic component
The pressure output mouth of pipe 545, second channel 532, first passage 531 and decompression feed back the mouth of pipe 546 and are inhaled into after low-pressure reservoir 300 again
Sub-distribution again made by press-in pressure-oil tank 200.Now, in the stroke draw-in groove 547 of valve pocket housing 540, high pressure is defeated for positioning plunger tip 536
Enter the mouth of pipe 544 to be closed by the lateral wall of valve element 530, locking is in closed mode.
When locomotive needs to berth static, motor 510 can rotate valve element 530 to making the high input voltage mouth of pipe 544, high pressure defeated
Outlet spout 545 and decompression feed back the state that the mouth of pipe 546 is closing.For example, positioning plunger tip 536 is right with the High voltage output mouth of pipe 545
Connect, to stop hydraulic oil from entering in hydraulic component.First passage 531 feeds back the mouth of pipe 546 with decompression and docks, second channel 532 with
Stroke draw-in groove 547 docks.The High voltage output mouth of pipe 545 is docked with the solid side walls of valve element 530.
In practical application, the numerical signal that meeting be transmitted according to the sensor on the link of hydraulic component, controlled motor is made
The reaction action of Millisecond, thus adjusting spool 530 rotates in valve pocket housing 540, reach stepless speed regulation, regulation, connect or
The purpose closed, accurately controls flow and the direction of every road hydraulic oil.
See also Figure 10, also include multiple hydraulic tube connecting assemblies 600, hydraulic tube connecting assembly 600 can be used for
Connect the High voltage output mouth of pipe 545 of each pressure regulation reversal valve 500 and each hydraulic component, for connecting the low of low-pressure reservoir 300
Force feed feeds back hole 340 and feeds back the mouth of pipe 546 it is of course also possible to be used for being connected high pressure oil outlet with the decompression of pressure regulation reversal valve 500
210 with the high input voltage mouth of pipe 544.
Each hydraulic tube connecting assembly 600 includes bent sub 610, nut 620, center tap 630 and emptying and adds liquid screw
640.Bent sub 610 is in substantially l type structure, and the two ends of bent sub 610 are provided with nut 620.Nut 620 is embedded activity
Fastener, knot that can be undone by a pull is in the two ends of bent sub 610, and can do 360 ° of rotations, is used for screwing the convergence parts such as center tap 630 and hydraulic pipe
Point.Emptying adds liquid screw 640 and is arranged at 610 jiaos of crooks of bent sub, for hydraulic tube connecting assembly 600 is carried out overhauling, carried out
Air emptying, add the maintenance measure such as hydraulic oil it is ensured that the normal operation of hydraulic component.
Above-mentioned pressure-oil tank 200, low-pressure reservoir 300, switch module 400 and pressure regulation reversal valve 500 can form hydraulic oil
Blood circulation.Hydraulic pressure oil circulating system can also include hydraulic tube connecting assembly 600.Hydraulic pressure oil circulating system makes each road hydraulic pressure
The hydraulic oil of device feeds back the mouth of pipe 546 through decompression and is back in low-pressure reservoir 300, more unified press-in pressure-oil tank 200 again
Middle work circulation continues distribution, realizes a hydraulic pressure oil circulating system and can correspond to multiple hydraulic components on different links,
Not only contribute to optimized Structure Design, also improve the integrated level of hydraulic pressure oil circulating system.
See also Figure 11 to Figure 16, drive mechanism 700 is mainly central hydraulic pump 10 and provides power, orders about piston
740 reciprocatingly move along along low-pressure reservoir 300, thus by the hydraulic oil press-in pressure-oil tank 200 in low-pressure reservoir 300.Drive
Motivation structure 700 includes power source, transmission component 720, piston rod part 730 and piston 740.Specific in present embodiment,
Power source can be unidirectional drive motor 710, and unidirectional drive motor 710, under regulated power supply, can make low turn of high pulling torque, constant speed rotation
Turn.The motor shaft 711 of unidirectional drive motor 710 can be hex-shaped shaft, and it is unidirectional that unidirectional drive motor 710 drives hex-shaped shaft to make
Rotate.
Specifically, drive mechanism 700 passes through transmission component 720 and piston rod part 730 orders about piston 740 along low pressure oil
Reciprocatingly move in case 300.Transmission component 720 includes the first screw rod 721, the first travelling gear 722, the second screw rod 723 and
Two travelling gears 724.First screw rod 721 is sheathed on the motor shaft 711 of unidirectional drive motor 710, and the first screw rod 721 is and electricity
The supporting screw rod of arbor 711.First screw rod 721 is cored screw, and cored screw is sheathed on motor shaft 711.Specifically, also may be used
To arrange set screw 7211 in the end of the first screw rod 721, the first screw rod 721 is firmly sheathed on motor shaft 711.
First travelling gear 722 is meshed with the first screw rod 721, and the first travelling gear 722 is sheathed on the second screw rod 723, so that the
One travelling gear 722 is rotated coaxially with the second screw rod 723, and the second travelling gear 724 is meshed with the second screw rod 723, forms two
Level gear/screw rod linkage structure.
Because drive mechanism 700 adopts two-stage gear/screw rod linkage structure, and power source is unidirectional drive motor 710,
So in any case, whole drive mechanism 700, all in irreversible state, effectively prevent and causes because internal pressure is too high
Recoil, leads to component of machine to drive in the wrong direction and causes the danger of other interconnected systems collapse.Specifically, positioning screw cap can also be set
7221, to prevent the first travelling gear 722 from coming off from the second screw rod 723.
Specifically, fixed support 725 can also be set, fixed support 725 be used for supporting power source, the first screw rod 721,
Two screw rod 723 grade parts.Fixed support 725 has two half supports 7251 cooperating, and each half support 7251 all has
There is circular arc side 7252, match in two circular arc sides 7252, make fixed support 725 be fastened on the outer of low-pressure reservoir 300
On the wall of side.Open up screwed hole 7253 by half support 7251 wherein, be arranged in screwed hole using threaded fastener 7254
In 7253, unidirectional drive motor 710 is arranged on fixed support 725.Second screw rod 723 is arranged on fixed support 725,
And it is respectively provided with thread bush 7231 in the end of the second screw rod 723, the second screw rod 723 is firmly arranged in fixed support
On 725.
Piston rod part 730 includes piston driving rotating disk 731, piston rod 732 and connecting rod base 733.Piston drives
The quantity of rotating disk 731 is two, is connected by rotating disk pin 7311 between two piston driving rotating disks 731.Each piston drives and turns
Multiple through holes are offered on disk 731, rotating disk pin 7311 is disposed therein in two relative through holes and drives to connect two pistons
Rotating disk 731.Turntable shaft 7312 is also set up on each piston driving rotating disk 731, turntable shaft 7312 stretches out in low-pressure reservoir 300.Tool
Body ground, turntable shaft 7312 passes through the first half circular shafts on the second semicircle axis hole 322 in low-pressure reservoir 300 and closing cap 380
The circular shaft hole that hole 381 is formed stretches out in low-pressure reservoir 300.Second travelling gear 724 is sheathed on turntable shaft 7312 and stretches out in low pressure
One end of fuel tank 300.
One end of piston rod 732 is arranged on rotating disk pin 7311, and the other end is connected with piston 740.Connecting rod base 733 sets
It is placed on piston 740.Specific in present embodiment, the other end of piston rod 732 passes through connecting rod base 733 and piston 740
Connect.One end of piston rod 732 offers through hole, and rotating disk pin 7311 is arranged in through hole, so that piston rod 732 is with piston
The rotation of driving rotating disk 731 and move.The other end of piston rod 732 offers through hole, and connecting rod base 733 is formed with two
The lug at interval, is opened up through hole on lug, is then arranged in successively with connecting-rod bolts (female) by connecting-rod bolts (male)
Match after through hole on the through hole and lug of piston rod, you can piston rod 732 is connected with connecting rod base 733.
The bottom of piston 740 is formed with poly- pressure pelvic cavity 741, and the hydraulic oil in low-pressure reservoir 300 is in the work of poly- pressure pelvic cavity 741
Isolate plunger tip 420 with lower compression.The bottom terminal ends of piston 740 are further opened with drain recess 742, when piston 740 is in low-pressure reservoir
When moving upwards in 300, a vacuum low-pressure area in low-pressure reservoir 300, can be formed, decompression feeds back the hydraulic oil of the mouth of pipe 546 from work
It is drawn in low-pressure reservoir 300 by vacuum low-pressure area in the drain recess 742 of plug.Specifically, the quantity of drain recess 742 can
Think multiple, the bottom terminal ends being distributed in piston 740 at multiple drain recess 742 intervals.The diameter of drain recess 742 can wait
Feed back the diameter in hole 340 in low pressure oil, so that when piston 740 just moves to low-pressure reservoir 300 upward stroke terminal surface, hydraulic pressure
Oil just enters in low-pressure reservoir 300 from drain recess 742.
When piston 740 moves downward, drain recess 742 from the perpendicular tangent plane incision of the medial wall of low-pressure reservoir 300, this
When hydraulic oil cannot be back to decompression feed back the mouth of pipe 546 in.Under the poly- pressure pelvic cavity 740 centripetal force effect of piston base, uniformly
Hydraulic oil is advanced downwardly by ground.Because unidirectional drive motor 710 drives the moment producing after piston 740 to be more than low-pressure reservoir 300
Pressure within inside and pressure-oil tank 200, makes hydraulic oil force isolation plunger tip 420 compressing coil tension spring 410 by force backward
Indentation, makes hydraulic oil be able to enter in pressure-oil tank 200 via the second through hole 311 from third through-hole.
It is further opened with cannelure 743 on the side wall of piston 740.The quantity of cannelure 743 is multiple, multiple cannelures 743
Axially spaced-apart setting along piston 740.The purpose of setting cannelure 743 is for sheathed sealing ring, and sealing ring is used for ensureing to live
Sealing between plug 740 and low-pressure reservoir 300.The top of piston 740 is further opened with escape groove 744, piston driving rotating disk
731st, piston rod 732 and connecting rod base 733 are all contained in escape groove 744.When piston driving rotating disk 731 drives piston rod
732 when moving along a curved path, and piston 740 makees linear reciprocal movement in the presence of piston rod 732.Piston 740 moves to low pressure
During upper end (i.e. second end) of fuel tank 300, the escape groove 744 on the top of piston 740 can allow piston driving rotating disk 731 pass through from
And proceed next do action.
Above-mentioned central hydraulic pump 10 at least has the advantage that
Unidirectional drive motor 710 orders about piston 740 and moves up, and the hydraulic oil in hydraulic component passes through pressure regulation reversal valve
500 are back in low-pressure reservoir 300；Unidirectional drive motor 710 orders about piston 740 and moves down, the hydraulic pressure in low-pressure reservoir 300
Oil forces isolation plunger tip 420 compression coil tension spring 410, and the hydraulic oil in low-pressure reservoir 300 passes through third through-hole and the second through hole
311 enter in pressure-oil tank 200, and now the pressure in pressure-oil tank 200 is more than the pressure of low-pressure reservoir 300, isolates plunger tip 420
Closing third through-hole, the hydraulic oil in pressure-oil tank 200 passes through in pressure regulation reversal valve 500 input hydraulic pressure device.Pressure-oil tank 200
Side wall on offer multiple spaced high pressure oil outlets 210, the side wall of low-pressure reservoir 300 offers multiple intervals and sets
The low pressure oil put feeds back hole 340, is additionally provided with multiple pressure regulation reversal valves 500, the high input voltage mouth of pipe of each pressure regulation reversal valve 500
544 are connected with high pressure oil outlet 210, and the High voltage output mouth of pipe 545 is connected with hydraulic component, decompression feed back the mouth of pipe 546 with low
Force feed feeds back hole 340 and is connected, and each pressure regulation reversal valve 500 corresponds to a hydraulic component, is needed according to different hydraulic components
Pressure is different, and motor orders about valve element 530 and rotates in valve pocket housing 540, changes first passage 531 and second channel 532 and valve
The high input voltage mouth of pipe 544 in set of shells 540, the High voltage output mouth of pipe 545 and decompression feed back the mouth of pipe 546 relative position it is allowed to
Or stop hydraulic oil from pressure-oil tank 200 input hydraulic pressure device, hydraulic oil is back to low-pressure reservoir 300 from hydraulic component
In, thus realizing the hydraulic component action of the multiple difference in functionalitys of control that can be relatively independent using a central hydraulic pump 10,
Reduce installation and debugging, repair and maintenance difficulty simultaneously, also improve effectiveness, the safety and use the longevity of long term device operation
Life.
Specific in present embodiment, this central hydraulic pump 10 can be applicable in digital locomotive, central hydraulic pump 10 low
Open up 12 low pressure oil altogether on force feed case 300 and feed back hole 340, pressure-oil tank 200 opens up 12 high pressure oil outlets 210 altogether, if
Put 12 pressure regulation reversal valves 500, to form 12 single channel, packet respectively controls 16 separate hydraulic components.
Wherein the 1st～8 tunnel is single channel single control, for 8 hydraulic components of diverse location in independent control suspension.The
9 tunnels are single channel group control, and for the synchronous operation of 2 hydraulic components of control machine cabin door, it is opening/closing to carry out car door on demand, angle
The functions such as regulation.10th tunnel is single channel group control, for controlling 2 hydraulic component synchronous operations on driver's seat safeguard protection hurdle, enters
The pressure function of safety protection to driver for the row.
11st tunnel is single channel group control, for controlling the synchronous operation of 2 hydraulic components of locomotive brake, except various energy
Reclaim the deceleration implementing to be unable to and be outside one's consideration and carry out brake hard brake function on demand.12nd tunnel is single channel group control, for controlling car
The synchronous operation of 2 hydraulic components of thick stick is protected in head front end, carries out the automatic control changeable of locomotive entering angle.Certainly, practical operation
In, can be different with functional requirement according to vehicle, increase or decrease single channel setting, become with saving parts with reducing car load power consumption
This.
Embodiment described above only have expressed the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformation can also be made and improve, these broadly fall into the guarantor of the present invention
Shield scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (10)
1. a kind of drive mechanism for central hydraulic pump, described central hydraulic pump has a low-pressure reservoir and a pressure-oil tank,
It is characterized in that, this drive mechanism includes:
Unidirectional drive motor, has a motor shaft；
Transmission component, including the first screw rod, the first travelling gear, the second screw rod and the second travelling gear, described first screw sleeve
On the motor shaft of described unidirectional drive motor, described first travelling gear is meshed with described first screw rod, and described first
Travelling gear is sheathed on described second screw rod, so that described first travelling gear is rotated with described second screw coaxial, described
Second travelling gear is meshed with described second screw rod；And
Piston, can reciprocatingly move in low-pressure reservoir with the rotation of described second travelling gear, thus by described low pressure oil
In hydraulic oil press-in pressure-oil tank in case.
2. the drive mechanism for central hydraulic pump according to claim 1 is it is characterised in that described unidirectional drive motor
Motor shaft be hex-shaped shaft.
3. the drive mechanism for central hydraulic pump according to claim 1 is it is characterised in that also include fixed support,
Described fixed support is used for supporting described unidirectional drive motor, the first screw rod and the second screw rod, and described fixed support has two
Half support cooperating, each described half support all has circular arc side, and matching in two circular arc sides, makes described solid
Fixed rack is fastened on the lateral wall of described low-pressure reservoir.
4. the drive mechanism for central hydraulic pump according to claim 1 is it is characterised in that also include piston connecting rod unit
Part, described piston rod part includes piston driving rotating disk and piston rod, and the quantity of described piston driving rotating disk is two, and two
Pass through rotating disk pin connection between individual described piston driving rotating disk, described piston driving rotating disk is additionally provided with turntable shaft, described work
Plug driving rotating disk is arranged in described low-pressure reservoir by described turntable shaft, and described turntable shaft stretches out in described low-pressure reservoir, institute
State the second travelling gear to be sheathed on described turntable shaft, one end of described piston rod is arranged on described rotating disk pin, the other end
It is connected with described piston.
5. the drive mechanism for central hydraulic pump according to claim 4 is it is characterised in that described piston rod part
Also include connecting rod base, described connecting rod base is arranged on described piston, described connecting rod base is used for connecting described piston rod
And described piston.
6. the drive mechanism for central hydraulic pump according to claim 5 it is characterised in that the top of described piston also
Offer escape groove, described piston driving rotating disk, described piston rod and described connecting rod base are contained in described escape groove.
7. the drive mechanism for central hydraulic pump according to claim 1 is it is characterised in that the bottom shape of described piston
Cheng Youju presses pelvic cavity, and the bottom terminal ends of described piston are further opened with drain recess.
8. the drive mechanism for central hydraulic pump according to claim 7 it is characterised in that described drain recess straight
The low pressure oil that footpath is equal in described low-pressure reservoir feeds back the diameter in hole.
9. the drive mechanism for central hydraulic pump according to claim 1 is it is characterised in that the side wall of described piston
Offer cannelure, described cannelure is arranged with sealing ring.
10. a kind of central hydraulic pump is it is characterised in that include:
Support base；
Pressure-oil tank, is arranged on described support base, and the side wall of described pressure-oil tank offers multiple spaced high pressure
Oil outlet, the top of described pressure-oil tank offers first through hole；
Low-pressure reservoir, has first end and the second end, and described first end is inserted in described pressure-oil tank by described first through hole
Interior, the end of described first end offers the second through hole, is additionally provided with dividing plate in described low-pressure reservoir, and described dividing plate is located at described
Between first end and described second end, described dividing plate offers third through-hole, the side wall of described low-pressure reservoir offers many
Individual spaced low pressure oil feeds back hole；And
It is used for the drive mechanism of central hydraulic pump as in one of claimed in any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410831661.9A CN104612927B (en) | 2014-12-26 | 2014-12-26 | Center hydraulic pump and drive mechanism thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410831661.9A CN104612927B (en) | 2014-12-26 | 2014-12-26 | Center hydraulic pump and drive mechanism thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104612927A CN104612927A (en) | 2015-05-13 |
| CN104612927B true CN104612927B (en) | 2017-01-18 |
Family
ID=53147532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410831661.9A Expired - Fee Related CN104612927B (en) | 2014-12-26 | 2014-12-26 | Center hydraulic pump and drive mechanism thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104612927B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3644067A (en) * | 1970-05-25 | 1972-02-22 | Sperry Rand Corp | Power transmission |
| CN2200580Y (en) * | 1994-05-21 | 1995-06-14 | 田宝云 | Hydraulic transmission bicycle |
| WO1999017021A1 (en) * | 1997-09-29 | 1999-04-08 | S.A.I. Societa' Apparecchiature Idrauliche S.P.A. | Hydraulic machine with radial pistons and variable displacement |
| JP5228000B2 (en) * | 2010-05-26 | 2013-07-03 | 日立建機株式会社 | Hybrid construction machine |
| CN203939795U (en) * | 2014-05-23 | 2014-11-12 | 中国石油化工股份有限公司 | Hydraulic power unit |
-
2014
- 2014-12-26 CN CN201410831661.9A patent/CN104612927B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN104612927A (en) | 2015-05-13 |
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