CN201521512U - Digital electro-hydraulic servo driving device adopting servo motor for direct drive - Google Patents
Digital electro-hydraulic servo driving device adopting servo motor for direct drive Download PDFInfo
- Publication number
- CN201521512U CN201521512U CN2009202214090U CN200920221409U CN201521512U CN 201521512 U CN201521512 U CN 201521512U CN 2009202214090 U CN2009202214090 U CN 2009202214090U CN 200920221409 U CN200920221409 U CN 200920221409U CN 201521512 U CN201521512 U CN 201521512U
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- worktable
- actuating motor
- driving device
- digital electro
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Abstract
The utility model relates to a digital electro-hydraulic servo driving device adopting a servo motor for direct drive, the structure is that two hydraulic output ends of a two-way hydraulic pump are connected with a workbench driving device, the workbench driving device is connected with a workbench, a first safety valve and a second safety valve are respectively arranged between the two hydraulic output ends of the two-way hydraulic pump in parallel connection, one hydraulic driving end of the workbench driving device is connected with a first hydraulic control one-way valve, the other hydraulic driving end is connected with a second hydraulic control one-way valve, the other ends of the two hydraulic control one-way valves are jointly connected with an oil-supplementing oil tank, a feedback optical grating is further arranged corresponding to the workbench, and a signal received by a signal input end of the servo motor is the signal amplified by the amplifier after comparing a control signal emitted by a control part with a position signal of the workbench fed back from the feedback optical grating by the comparator. The digital electro-hydraulic servo driving device has the advantages of short driving chain, small volume, light weight, small inertia, high driving precision, high driving rigidity, good dynamic quality, impulsive vibration resistance and low cost.
Description
Technical field
The utility model belongs to a kind of digital electro-hydraulic servo drive device, particularly relates to the digital electro-hydraulic servo drive device that the employing actuating motor of a kind of driving that is used for numerical control machine tool low-speed big rotational coordinates workpiece turntable or low-speed high-thrust rectilinear coordinates directly drives.
Background technique
Nearly 30 years, numerical control machine tool obtained fast-developing and has popularized in China, and the working motion of a numerical control machine tool is by to five-axis linkage machine tools five of two numerically controlled lathe and three numerical control milling machine, to the multiaxis development with complex function.Though being used for the rectilinear coordinates of numerical control machine tool, current existing linear electric motor drive, the rotational coordinates that has the high pulling torque torque motor to be used for numerical control machine tool directly drives, but because linear electric motor and torque motor cost an arm and a leg, shortcomings such as power of directly driving and moment deficiency can't be extensive use of.For straight line motion, the actuating motor that is to use that current employing is more passes through the driving of ball screw direct connection, when direct connection driving moment deficiency, when rotary inertia does not match, uses toothed belt or low back clearance precision gear speed reducer to slow down.For the continuous rotation and the calibration setting movement of work spindle that needs numerical controlization and cutter spindle, adopt actuating motor mostly and pass through the accurate speed reducer of large speed ratio to drive.When adopting the big retarding ratio speed reducer to drive, because the backlass and the driving error of speed reducer, greatly reduce transmission accuracy, while is owing to Transmitted chains is long, and reduced the rigidity of transmission, this will cause machine vibration, the efficient and the quality of influence processing, the life-span that also can reduce cutter and lathe.In addition, when linear drives power reaches tens tons, when the moment that rotation drives reached tens thousand of Nm, the mechanical reduction machine too greatly too remake and can't install, and inertia is too big on kinology, and the dynamic quality that causes motion is too low and can't use.
Summary of the invention
The digital electro-hydraulic servo drive device that the utility model directly drives for the employing actuating motor that solves the technical problem that exists in the known technology and provide a kind of driving that is used for numerical control machine tool low-speed big rotational coordinates workpiece turntable or low-speed high-thrust rectilinear coordinates.。
The technological scheme that the utility model is taked for the technical problem that exists in the solution known technology is: a kind of digital electro-hydraulic servo drive device that adopts actuating motor directly to drive, include worktable, also be provided with actuating motor and by the bidirectional hydraulic pump of driven by servomotor, two hydraulic pressure output terminals of described bidirectional hydraulic pump connect Working table driving device, described Working table driving device connects the action that worktable is used to drive worktable, between two hydraulic pressure output terminals of bidirectional hydraulic pump, first safety valve and second safety valve also have been arranged in parallel respectively, a hydraulic driving end of described Working table driving device connects first Pilot operated check valve, another hydraulic driving end connects second Pilot operated check valve, the other end of described first Pilot operated check valve is connected the repairing fuel tank jointly with the other end of second Pilot operated check valve, corresponding worktable also is provided with the feedback grating, the signal that signal input part received of described actuating motor is, control device branch control signal of sending and the position signal that feeds back the worktable that grating fed back after comparator compares, are carried out amplifying signal through amplifier again.
Described Working table driving device is to adopt two-way linear to drive oil hydraulic cylinder or employing oil hydraulic motor.
Described worktable is the worktable of two-way linear motion.
Described worktable is the two-way worktable that rotatablely moves.
Described first safety valve is opposite with the flow direction of second safety valve.
Described first Pilot operated check valve is opposite with the flow direction of second Pilot operated check valve.
Described feedback grating is the straight line type grating, or round grating.
Advantage and the good effect that the utlity model has are: the digital electro-hydraulic servo drive device that employing actuating motor of the present utility model directly drives has following characteristics:
1, Transmitted chains is short, and volume is little, and is in light weight, and inertia is little, the transmission accuracy height, and the transmission rigidity height, dynamic quality is good, anti shock and vibration, cost is lower;
2, with pure electric actuating motor and oil hydraulic pump and fluid pressure drive device combination, form digital high-torque high-thrust electro-hydraulic servo drive device, the control high rigidity high thrust high pulling torque convenient and hydraulic actuator of actuating motor is combined, improved the controllability of hydraulic actuator greatly, enlarged the using scope of fluid drive mechanism, be applicable to that numerical control machine tool low-speed big (1～100,000 Nm) rotational coordinates drives and the driving of low-speed high-thrust rectilinear coordinates;
3, compare with the electro-hydraulic servo drive device of traditional use electrohydraulic control, have higher transmission efficiency and the reliability of Geng Gao, energy-conservation and do not generate heat.
Description of drawings
Fig. 1 is the structural representation of first mode of execution of the present utility model;
Fig. 2 is the structural representation of second mode of execution of the present utility model.
Label among the figure is respectively:
The 1-worktable; The 2-actuating motor; 3-bidirectional hydraulic pump; The 4-Working table driving device; 5-feeds back grating; The 6-comparator; The 7-amplifier; 8-first safety valve; 9-second safety valve; 10-first Pilot operated check valve; 11-second Pilot operated check valve; 12-repairing fuel tank.
Embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. describes in detail of the present utility model as follows:
As Fig. 1, shown in Figure 2, the digital electro-hydraulic servo drive device that employing actuating motor of the present utility model directly drives, include worktable 1, the bidirectional hydraulic pump 3 that also is provided with actuating motor 2 and drives by actuating motor 2, two hydraulic pressure output terminals of described bidirectional hydraulic pump 3 connect Working table driving device 4, described Working table driving device 4 connects the action that worktable 1 is used to drive worktable 1, also be arranged in parallel first safety valve 8 and second safety valve 9 between two hydraulic pressure output terminals of bidirectional hydraulic pump 3 respectively, described first safety valve 8 is opposite with the flow direction of second safety valve 9.Described first safety valve 8 and second safety valve, 9 roles are in the anxious stopping time of actuating motor, play the effect of buffering step-down, reduce the damage that causes pipeline because of pressure pulse.A hydraulic driving end of described Working table driving device 4 connects first Pilot operated check valve 10, another hydraulic driving end connects second Pilot operated check valve 11, and the other end of described first Pilot operated check valve 10 is connected repairing fuel tank 12 jointly with the other end of second Pilot operated check valve 11.Described first Pilot operated check valve 10 is opposite with the flow direction of second Pilot operated check valve 11.Corresponding worktable 1 also is provided with feedback grating 5, the signal that signal input part received of described actuating motor 2 is, the position signal of the worktable 1 that the control signal that the control device branch is sent and feedback grating 5 are fed back carries out amplifying signal through amplifier 7 again after comparator 6 compares.
The digital electro-hydraulic servo drive device that employing actuating motor of the present utility model directly drives, all adopt actuating motor directly to drive the bidirectional hydraulic pump, thereby form the digital electric-hydraulic servopump, when electro-hydraulic servo pump and high thrust oil hydraulic cylinder formation high-thrust digital electro-hydraulic servo-cylinder, finish the low-speed high-thrust rectilinear coordinates with it and drive; When electro-hydraulic servo pump and high-torque hydraulic motor formation low-speed big digital electric hydraulic servo motor, can be used for the driving of low-speed big running shaft.
As shown in Figure 1, described Working table driving device 4 is the oil hydraulic cylinders that adopt two-way linear to drive, and described worktable 1 is the worktable of two-way linear motion, and described feedback grating 5 is the straight line type grating
As shown in Figure 2, described Working table driving device 4 is to adopt oil hydraulic motor, and described worktable 1 is the two-way worktable that rotatablely moves, and described feedback grating 5 is round grating.
The working procedure of the digital electro-hydraulic servo drive device that employing actuating motor of the present utility model directly drives is, when worktable is worked, the current mobile status signal b of the worktable of control command signal a that comparator at first sends computer and grating feedback compares, when the feedback mobile status signal b greater than the control command signal a that computer sent, actuating motor reverses; When the current mobile status signal b of worktable of feedback less than the control command signal a that computer sent, actuating motor carries out proper functioning; When the feedback the current mobile status signal b of worktable equal the control command signal a that computer sends, actuating motor quits work.
Claims (7)
1. digital electro-hydraulic servo drive device that adopts actuating motor directly to drive, include worktable (1), it is characterized in that: the bidirectional hydraulic pump (3) that also is provided with actuating motor (2) and drives by actuating motor (2), two hydraulic pressure output terminals of described bidirectional hydraulic pump (3) connect Working table driving device (4), described Working table driving device (4) connects the action that worktable (1) is used to drive worktable (1), first safety valve (8) and second safety valve (9) between two hydraulic pressure output terminals of bidirectional hydraulic pump (3), also have been arranged in parallel respectively, a hydraulic driving end of described Working table driving device (4) connects first Pilot operated check valve (10), another hydraulic driving end connects second Pilot operated check valve (11), the other end of described first Pilot operated check valve (10) is connected repairing fuel tank (12) jointly with the other end of second Pilot operated check valve (11), corresponding worktable (1) also is provided with feedback grating (5), the signal that signal input part received of described actuating motor (2) is, the position signal of the worktable (1) that the control signal that the control device branch is sent and feedback grating (5) are fed back carries out amplifying signal through amplifier (7) again after comparator (6) compares.
2. the digital electro-hydraulic servo drive device that employing actuating motor according to claim 1 directly drives is characterized in that: described Working table driving device (4) is to adopt two-way linear to drive oil hydraulic cylinder or employing oil hydraulic motor.
3. the digital electro-hydraulic servo drive device that employing actuating motor according to claim 1 directly drives is characterized in that: described worktable (1) is the worktable of two-way linear motion.
4. the digital electro-hydraulic servo drive device that employing actuating motor according to claim 1 directly drives is characterized in that: described worktable (1) is the two-way worktable that rotatablely moves.
5. the digital electro-hydraulic servo drive device that employing actuating motor according to claim 1 directly drives is characterized in that: described first safety valve (8) is opposite with the flow direction of second safety valve (9).
6. the digital electro-hydraulic servo drive device that employing actuating motor according to claim 1 directly drives is characterized in that: described first Pilot operated check valve (10) is opposite with the flow direction of second Pilot operated check valve (11).
7. the digital electro-hydraulic servo drive device that employing actuating motor according to claim 1 directly drives is characterized in that: described feedback grating (5) is the straight line type grating, or round grating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202214090U CN201521512U (en) | 2009-10-19 | 2009-10-19 | Digital electro-hydraulic servo driving device adopting servo motor for direct drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202214090U CN201521512U (en) | 2009-10-19 | 2009-10-19 | Digital electro-hydraulic servo driving device adopting servo motor for direct drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201521512U true CN201521512U (en) | 2010-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202214090U Expired - Fee Related CN201521512U (en) | 2009-10-19 | 2009-10-19 | Digital electro-hydraulic servo driving device adopting servo motor for direct drive |
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| CN (1) | CN201521512U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797658A (en) * | 2012-08-28 | 2012-11-28 | 路文忠 | Digital linear servo pump |
| CN104169046A (en) * | 2012-04-12 | 2014-11-26 | 住友重机械工业株式会社 | Surface grinder |
| CN108644160A (en) * | 2018-08-03 | 2018-10-12 | 西安科技大学 | A kind of overflow valve dynamic characteristic improvement device |
-
2009
- 2009-10-19 CN CN2009202214090U patent/CN201521512U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104169046A (en) * | 2012-04-12 | 2014-11-26 | 住友重机械工业株式会社 | Surface grinder |
| CN104169046B (en) * | 2012-04-12 | 2016-08-24 | 住友重机械工业株式会社 | Surface grinding machine |
| CN102797658A (en) * | 2012-08-28 | 2012-11-28 | 路文忠 | Digital linear servo pump |
| CN108644160A (en) * | 2018-08-03 | 2018-10-12 | 西安科技大学 | A kind of overflow valve dynamic characteristic improvement device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100707 Termination date: 20181019 |
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| CF01 | Termination of patent right due to non-payment of annual fee |