CN207830250U - A kind of digital hydraulic speed change operating valve - Google Patents
A kind of digital hydraulic speed change operating valve Download PDFInfo
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- CN207830250U CN207830250U CN201721564079.6U CN201721564079U CN207830250U CN 207830250 U CN207830250 U CN 207830250U CN 201721564079 U CN201721564079 U CN 201721564079U CN 207830250 U CN207830250 U CN 207830250U
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- servo motor
- speed change
- spool
- change operating
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Abstract
The utility model discloses a kind of digital hydraulic speed change operating valves, are applied to engineering machine loading machine, the loading machine is configured with the speed probe for measuring wheel of loading machine rotating speed；Including driving device, valve body, spool and PLC logic programming controllers；The utility model has the beneficial effects that：Speed change operating valve is connect with PLC controller and velocity sensor, realizes the function of automatically switching gear, fast response time, commutation is precisely；Applied to the labor intensity that can substantially reduce operator on loading machine, and the loading machine equipped with the utility model is of less demanding for the technology of operator.
Description
Technical field
The utility model is related to a kind of hydraulic valves, are specifically related to a kind of digital hydraulic speed change operating valve, belong to loading machine and change
Retaining device field.
Background technology
For loading machine in spading operation, bucket front-end comes from two direction active forces, a loading being horizontally oriented
Machine travel power, a loading machine digging force being vertically oriented.Loading machine tractive force is provided by loader transmission system.Turn up
Power is provided by hydraulic system of working.It is a cyclic process to load machine operation：It is inserted into material heap, spading is (full to scraper bowl shovel
Bucket), it exits material heap and proceeds to target emptying point, lift, discharging.During entire work cycle, transmission system of wheel loader is complete
Cheng Fahui important function.Loading machine largely uses power shifting twin turbines speed changer at present, its two forward gear of offer, and one
A retroversion gear, a neutral gear, shift are completed by a Mechanical course speed change operating valve.In two forward gears, I gear is
Maximum drawbar pull is provided, II gear is to provide peak efficiency.Therefore, during loading machine use, when kept off with I, what
Shi Houyong II is kept off, and is judged completely by operator.It is influenced by operator's human factor, shift will consume energy not in time, and shift is too early
Operating efficiency is affected again.It especially can not achieve according to load self shifter, there is very big limitation.
Speed change operating valve is all to push valve by manually used in the first two latter loading machine of current planetary power shifting
Core movement achievees the purpose that shift, this speed change operating valve bring problems with to loader drive employee：
1, larger working strength is brought to driver.Because when loading machine operation, when spading, needs loading machine maximum to lead
Gravitation, so it to be switched to I gear work, and when walking, efficiency is improved again, to be often switched to II gear work, each time
It manipulates speed change gear and needs 20N steering forces.So it is very that driver, which will continually manipulate speed change gear to switch its labor intensity,
Big.
2, driver's operation qualification is required high.Loading machine needs driver to want ripe in spading operation and walking
Practice support and hold loading condition, when this is switched to I gear, and when this is switched to II gear, therefore operating efficiency and driver
Qualification has prodigious relationship.
3, it consumes energy.It when driver works long hours, inevitably feels exhausted, when operation, the switching gear judgement time increases
Or it is too fast, operating efficiency is low, therefore produces the time that loading machine flogs a dead horse.
4, it can not achieve automated job.
Therefore it provides a kind of speed change operating valve of self shifter according to actual needs becomes a urgent problem needed to be solved.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of digital hydraulic speed change operating valve, including driving dress
It sets, valve body, spool and PLC logic programming controllers, the interior through-hole having through valve body both ends of valve body, spool are threaded through in through-hole
And through-hole is stretched out at both ends；There are I grade of oil input channel and I grade of back oil road, II grade of oil input channel and II grade of back oil road and R grades of oil inlets on valve body
Road and R grades of back oil roads；On valve body have pressure oil passage, driving device drive spool only along through-hole axial movement, I grade into
Oil duct and I grade of back oil road, II grade of oil input channel and II grade of back oil road, R gear oil input channels and R gear back oil roads and pressure oil passage are convertible
Connection；PLC logic programming controllers connect driving device, and PLC logic programming controllers are connect with speed probe.
The utility model has the beneficial effects that：Drive control is carried out to driving device by PLC logic programming controllers, when
After driving device obtains the digital signal that PLC logic programming controllers are sent out, driving device driving, and then drive spool axial direction position
It moves, makes pressure oil passage oil input channel connection corresponding with required gear, other gear oil input channels are connected to back oil road, and then make vehicle
Achieve the purpose that shift.
Further, driving device is servo motor, which further includes nut, stop pin and watch
Take motor cabinet；Servo motor is connected to the side of valve body axial direction by servo motor seat；Nut is installed on inside servo motor seat,
The output shaft of servo motor is keyed with nut one end；The inside of the nut other end passes through nut inner thread screw thread with spool one end
Connection；The one end of spool far from servo motor is axially arranged with sliding slot along it, and valve body is equipped with pin hole corresponding with runner position, prevents
Plunger of shipping and reselling on another market is inserted into sliding slot through pin hole and is slidably connected with it；Servo motor is fixedly connected on servo motor seat one end, watches
The other end for taking motor cabinet is bolted in the side of valve body axial direction.The utility model uses the beneficial effect of above-mentioned further scheme
Fruit is：When servo motor drives, the output shaft of servo motor can directly drive nut rotation；Nut is threadedly coupled with spool,
By preventing spool with nut rotation in insertion sliding slot and by being slidably connected with it stop pin plunger so that nut turns
Spool generates axial displacement when dynamic.
Further, nut has the annular opening slot of inside axis direction recess close to the position at its both ends, and close
Servo motor one end is first annular open slot, is the second annular opening slot close to valve body one end；In first annular opening
First thrust ball bearing is installed in slot, the second thrust ball bearing is installed in the second annular opening slot；First annular opening
Compatible hole baffle ring, hole gear are installed in slot on the corresponding servo motor seat endoporus of the first thrust ball bearing of installation
Circle is between servo motor and the first thrust ball bearing；Hole baffle ring is close in first thrust ball bearing one end end face, and second pushes away
The end face of power ball bearing one end is adjacent to servo motor seat, it is therefore an objective to prevent nut from moving axially.The utility model is using above-mentioned
Further the advantageous effect of scheme is：By the position at nut both ends, annular opening slot and the installed thrust in open slot are set
Ball bearing and hole baffle ring so that nut end face and hole are substantially reduced with the friction between baffle ring, between nut end face and valve body,
Thereby reduce the mesh power of servo motor and the mechanical wear of nut.
Further, the one end of valve body far from servo motor is installed with screw plug.The screw plug defines the maximum of spool
Displacement and oil leak.
Further, there are gaps between the first thrust ball bearing, the second thrust ball bearing and the inner wall of servo motor seat；
The design can ensure that thrust ball bearing does not generate radial frictional force.
The utility model has the beneficial effects that：Speed change operating valve is connect with PLC controller and velocity sensor, is realized certainly
The function of dynamic switching gear, fast response time, commutation are accurate；It is strong applied to the labour that can substantially reduce operator on loading machine
Degree, and the loading machine equipped with the utility model is of less demanding for the technology of operator.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of digital hydraulic speed change operating valve of the utility model.
Wherein, 1- servo motors, the first thrust ball bearings of 2-, 3- nuts, the second thrust ball bearings of 4-, 5- servo motors
Seat, 6- valve bodies, 7- spools, 8- sliding slots, 9- stop pins, 10- screw plugs, 11- pressure oil passages, 12- spool screw rods, in 13- nuts
Screw thread, I grade of oil input channel of 14-, II grade of oil input channel of 15-, 16-R grades of oil input channels, I grade of back oil road of 171-, II grade of back oil road of 172-,
173-R grades of back oil roads, the first annular open slots of 18-, 19- the second annular opening slots, 20- pin holes, the holes 21- baffle ring.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
It clearly and completely describes, the described embodiments are only a part of the embodiments of the utility model, rather than whole implementation
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
As shown in Figure 1, the utility model embodiment discloses a kind of digital hydraulic speed change operating valve, including driving device,
Valve body 6, spool 7 and PLC logic programming controllers, the interior through-hole having through 6 both ends of valve body of valve body 6, spool 7 are threaded through through-hole
Through-hole is stretched out at interior and both ends；There is I grade of oil input channel 14 and I grade of back oil road, 171, II grades of oil input channels 15 and II grade of oil return on spool 7
Road 172 and R grades of oil input channels 16 and R grades of back oil roads 173；There is pressure oil passage 11, driving device to drive spool 7 only on spool 7
Along the axial movement of through-hole, I grade of oil input channel, 14, II grades of oil input channels 15 and and R grades of oil input channels 16 converted with pressure oil passage 11
Connection；PLC logic programming controllers connect driving device, and PLC logic programming controllers are connect with speed probe.
Driving device is servo motor 1, further includes nut 3, stop pin 9 and servo motor seat 5；Servo motor 1 is by watching
It takes motor cabinet 5 and is connected to the axial side of valve body 6；Nut 3 is installed on inside servo motor seat 5, the output shaft of servo motor 1
It is keyed with the inside of 3 one end of nut；The inside of 3 other end of nut is threadedly coupled with 7 one end of spool by nut inner thread 13；
The one end of spool 7 far from servo motor 1 is axially arranged with sliding slot 8 along it, and valve body 6 is equipped with pin hole 20 corresponding with 8 position of sliding slot,
9 plunger of stop pin is inserted into sliding slot 8 through pin hole 20 and is slidably connected with it；Servo motor 1 is fixedly connected on servo motor seat 5
The other end of one end, servo motor seat 5 is bolted in the axial side of valve body 6.
Nut 3 has the annular opening slot of inside axis direction recess close to the position at its both ends, and close to servo motor 1
One end is first annular open slot 18, is the second annular opening slot 19 close to 6 one end of valve body；In first annular open slot 18
First thrust ball bearing 2 is inside installed, the second thrust ball bearing 4 is installed in the second annular opening slot 19；It is first annular to open
Installation 2 corresponding servo motor seat endoporus of the first thrust ball bearing is equipped with compatible hole baffle ring 21, Kong Yong in mouth slot
Baffle ring 21 is located between servo motor 1 and the first thrust ball bearing 2；It is close to hole baffle ring in first thrust ball bearing, 2 one end end face
21, the end face and servo motor seat 5 of 4 one end of the second thrust ball bearing are adjacent to；Peace is fixed in the one end of valve body 6 far from servo motor 1
Equipped with screw plug 10；There are gaps between the inner wall of servo motor seat 5 for first thrust ball bearing 2, the second thrust ball bearing 4；
The output shaft of servo motor 1 is keyed with nut 3.
The specific work process of the utility model is as follows：In neutral gear position, PLC does not control signal to servo motor,
Spool is in the positions Fig. 1, and servo motor 1 obtains PLC controller and sends out control position pulse digital signal to servo-driver, watches
It takes driver control servo motor 1 to rotate counterclockwise, nut 3 is driven to be rotated counterclockwise without axial movement, be inserted into and slide in stop pin 9
Under the action of slot 8, force slidingtype spool 7 that cannot rotate counterclockwise, therefore, 3 rotation of nut rotated counterclockwise pulls sliding
Formula spool 7 moves in a straight line, and is watched when slidingtype spool 7 is controlled with encoder feedback to servo-driver in place, in servo motor 1
The shutdown of motor 1 is taken, at this point, I gear 14 oil inlet of oil input channel, completes to I gear shift process, when the rotating speed of speed probe feedback
When increasing to a certain setting value, PLC sends out control P-pulse to servo-driver again, servo drive control servo motor 1 after
Continuous rotation counterclockwise, band encoder feedback gives servo-driver control servomotor 1 to shut down in servo motor 1, at this point, II keep off into
15 oil inlet of oil duct completes the upshift process from I gear to II gear.When the rotating speed of speed probe feedback is reduced to, downshift is a certain to be set
When definite value, PLC sends out control position pulse signal to servo-driver, and servo-driver control servomotor 1 rotates clockwise,
Band encoder feedback drives device to servo in servo motor 1, and servo-driver control servomotor 1 is shut down, at this point, I gear oil input channel
14 oil inlets complete the downshift process from II gear to I gear.When oil inlet passage 14 and drainback passage 171, oil inlet passage 15 and oil return
When channel 172, oil inlet passage 16 are all communicated with drainback passage 173, spool 7 is in middle position at this time, i.e. gear change is in sky
Gear.Fig. 1 is exactly to be in neutral gear position.
In neutral gear position, gear is converted to reversing gear manually by driver, PLC sends out control position pulse signal to watching
It takes drive control servo motor 1 to rotate clockwise, 3 rotation of nut pushes slidingtype spool 7 to move in a straight line, when slidingtype spool
7 in place, and band encoder feedback gives servo-driver control servomotor 1 to shut down in servo motor 1, at this point, R grades of oil input channels 16 into
Oil completes R gear shift processes.
In actual work, driver can first manually convert gear to one grade, then greater engine throttle, then by described
Digital hydraulic speed change operating valve is according to vehicle wheel rotational speed self shifter.
The utility model has the beneficial effects that：Speed change operating valve is connect with PLC controller and velocity sensor, is realized certainly
The function of dynamic switching gear, fast response time, commutation are accurate；It is strong applied to the labour that can substantially reduce operator on loading machine
Degree, and the loading machine equipped with the utility model is of less demanding for the technology of operator.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all in this practicality
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (10)
1. a kind of digital hydraulic speed change operating valve is applied to engineering machinery-loading machine, which is configured with loads for measuring
The speed probe of locomotive wheel speed；It is characterised in that it includes driving device, valve body (6), spool (7) and PLC logical program controls
Device processed, the interior through-hole having through valve body (6) both ends of the valve body (6), the spool (7) is threaded through in the through-hole and both ends
Stretch out the through-hole；Have on the spool (7) I grade of oil input channel (14) and I grade of back oil road (171), II grade of oil input channel (15) and
II grade of back oil road (172)；There is pressure oil passage (11), the driving device to drive the spool (7) only on the spool (7)
Along the axial movement of the through-hole, I grade of oil input channel (14) and I grade of back oil road (171), II grade of oil input channel (15) and II grade
Back oil road (172), I grade of oil input channel (14) and II grade of oil input channel (15) are switched by spool (7) to be connected to pressure oil passage (11)；
The PLC logic programming controllers connect the driving device；The PLC logic programming controllers connect the revolution speed sensing
Device.
2. a kind of digital hydraulic speed change operating valve according to claim 1, which is characterized in that further include R grades of oil input channels (16)
With R grades of back oil roads (173), the R grades of oil input channel (16) is connected to by the way that spool (7) is mobile with pressure oil passage (11).
3. a kind of digital hydraulic speed change operating valve according to claim 1 or claim 2, which is characterized in that the driving device is to watch
Motor (1) is taken, the digital hydraulic speed change operating valve further includes nut (3), stop pin (9) and servo motor seat (5)；It is described to watch
Take the side that motor (1) is connected to the valve body (6) axial direction by servo motor seat (5)；The nut (3) is installed on described watch
Motor cabinet (5) inside is taken, is fixedly connected on the inside of the output shaft of the servo motor (1) and one end of the nut (3)；The spiral shell
The internal thread (13) of female (3) other end is connect with the spool (7) one end external screw thread；The spool (7) is far from servo motor (1)
One end be axially arranged with sliding slot (8) along it, the valve body (6) is equipped with pin hole (20) corresponding with the sliding slot (8) position, institute
Stop pin (9) plunger is stated to be inserted into sliding slot (8) through the pin hole (20) and be slidably connected with it.
4. a kind of digital hydraulic speed change operating valve according to claim 3, which is characterized in that the servo motor (1) is solid
Surely it is connected to the servo motor seat (5) one end, the other end of the servo motor seat (5) is bolted in the valve body (6)
Axial side.
5. a kind of digital hydraulic speed change operating valve according to claim 3, which is characterized in that the nut (3) is close to it
The position at both ends has the annular opening slot of inside axis direction recess, and is first annular close to servo motor (1) one end
Open slot (18) is the second annular opening slot (19) close to valve body (6) one end；The peace in the first annular open slot (18)
Equipped with the first thrust ball bearing (2), the second thrust ball bearing (4) is installed in the second annular opening slot (19).
6. a kind of digital hydraulic speed change operating valve according to claim 5, which is characterized in that the servo motor seat (5)
Equipped with hole corresponding with the first thrust ball bearing (2) with baffle ring (21) on endoporus, the hole is located at the servo with baffle ring (21)
Between motor (1) and first thrust ball bearing (2).
7. a kind of digital hydraulic speed change operating valve according to claim 6, which is characterized in that first thrust ball bearing
(2) hole baffle ring (21) is close in one end end face, and the end face and servo motor seat (5) of described second thrust ball bearing (4) one end are pasted
Tightly.
8. a kind of digital hydraulic speed change operating valve according to claim 7, which is characterized in that the valve body (6) is separate to be watched
The one end for taking motor (1) is installed with screw plug (10).
9. a kind of digital hydraulic speed change operating valve according to claim 7, which is characterized in that first thrust ball bearing
(2), the second thrust ball bearing (4), there are gaps between the inner wall of the servo motor seat (5).
10. a kind of digital hydraulic speed change operating valve according to claim 3, which is characterized in that the servo motor (1)
Output shaft is keyed with the nut (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721564079.6U CN207830250U (en) | 2017-11-21 | 2017-11-21 | A kind of digital hydraulic speed change operating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721564079.6U CN207830250U (en) | 2017-11-21 | 2017-11-21 | A kind of digital hydraulic speed change operating valve |
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| Publication Number | Publication Date |
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| CN207830250U true CN207830250U (en) | 2018-09-07 |
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ID=63386544
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721564079.6U Active CN207830250U (en) | 2017-11-21 | 2017-11-21 | A kind of digital hydraulic speed change operating valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107869490A (en) * | 2017-11-21 | 2018-04-03 | 黎明液压有限公司 | A kind of digital hydraulic speed change operating valve |
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2017
- 2017-11-21 CN CN201721564079.6U patent/CN207830250U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107869490A (en) * | 2017-11-21 | 2018-04-03 | 黎明液压有限公司 | A kind of digital hydraulic speed change operating valve |
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