CN102653066A - Integrated transmission case for machine tool - Google Patents
Integrated transmission case for machine tool Download PDFInfo
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- CN102653066A CN102653066A CN2011100522027A CN201110052202A CN102653066A CN 102653066 A CN102653066 A CN 102653066A CN 2011100522027 A CN2011100522027 A CN 2011100522027A CN 201110052202 A CN201110052202 A CN 201110052202A CN 102653066 A CN102653066 A CN 102653066A
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Abstract
The invention discloses an integrated transmission case for a machine tool. The transmission case adopts two one-way transmissions in opposite directions, and rapid retrocession and slow feed of the machine tool can be realized by asimple structure, so that the integrated transmission case has the advantages of simple structure, low construction cost, low failure rate and low maintaining cost. Meanwhile, a torque clutch is arranged between a power system of the machine tool and an executive device of the machine tool so as to increase the torque of a transmission shaft when the machine tool is blocked in the feed motion, and finally, the toque clutch is tripped, the machine tool maintains a harmless clamping force and the motor cannot be blocked from rotating and being burnt down, at the same time, a control motor is controlled to reversely rotate and recess under the support of a control circuit. The device is a mechanical anti-rotating-blockage device having the advantages of simple structure, low construction cost, low failure rate and high security and reliability. Meanwhile, the transmission case and a planetary gear reduction gear can be integrally installed in the same transmission case body, so that the problem of single function of a mechanical transmission can be overcome and the whole transmission case can integrally complete mechanical outputs of forward and backward rotation at different speeds and meet the anti-rotating-blockage requirement.
Description
Technical field
The present invention relates to machine tool field, particularly a kind of lathe one transmission case.
Background technology
The general requirement of lathe retreated fast, and requires at a slow speed during feeding, retreats the efficient height to reach; The requirement that the feeding safety coefficient is high, at present lathe generally adopts a cover reduction gear box of rotating constant speed output, under the consistent situation of the motor speed of its connection; The rotating speed of its output is the same with torque, and in order to realize retreating fast and feeding at a slow speed, its speed governing generally adopts gear that motor speed governing system or clutch switch different speed ratios to realize retreating the friction speed with feeding; Said system exists the control system architecture complicated; Cost is high, and fault rate is high, shortcomings such as maintenance cost height.Its mechanical driving device function singleness simultaneously, requirement that can not integrated completion mechanical type rotating different rotating speeds output.In addition, plant equipment has a lot of functions to realize through transmission of torque, when load end overload or stuck; The motor of power stall is provided and generates heat even burn causing, the therefore general relay overcurrent protective device that adopts in time breaks off motor power; To reach the purpose of protection motor, in practical application, usually, overcurrent protection caused motor to burn because losing efficacy; Therefore, overcurrent protection can not be stopped the accident generation fully.In addition, some equipment need apply and keeps certain pressure to workpiece, and general at present the employing is advanced into workpiece with execution units such as briquetting or work piece holders earlier; After arriving the precalculated position, it is out of service to adopt sensor or travel switch to control motor, and then the base part of locked briquetting or anchor clamps; There are two defectives in this method; The one, can not accurately control pressure or chucking power to workpiece, increase pressure sensor control system and can increase cost greatly, the 2nd, when sensor and travel switch inefficacy; Still can cause the motor stall, possible defective work piece or motor.The controlled pressure that therefore, need increase more reliably, again can be more accurate or the transmission device of chucking power.Simultaneously, the general speed change gear that uses of lathe is common gear-box at present, and gear quantity is more, and device volume is bigger, and cost is higher.
Summary of the invention
For addressing the above problem, the object of the present invention is to provide a kind of simple in structurely, cost is lower, and fault rate is low, and volume is little, and maintenance cost is low, has the lathe one transmission case of the high mechanical type pinch resistant functionality of reliability simultaneously.
For achieving the above object, technical scheme of the present invention is: a kind of lathe one transmission case,
Comprise:
The non-constant speed output gear of transmission case body, planetary gear and rotating wheels;
The non-constant speed output gear of said rotating wheels are provided with the driving shaft of torque input and the driven axle of output torque, and retreat driving gear, feeding driving gear, retreat driven gear and feeding driven gear;
Said driving shaft and said planetary output shaft are in transmission connection, and the dynamical system of said planetary power shaft and said lathe is in transmission connection;
Between the actuating unit of said driven axle and said lathe, also be provided with torsion clutch; Said torsion clutch comprises power input shaft and power output shaft;
Saidly retreat driven gear and the feeding driven gear is coaxial is connected on the driven axle, the power input shaft of said driven axle and said torsion clutch is in transmission connection, and the power output shaft of said torsion clutch and the actuating unit of lathe are in transmission connection;
Said retreat driving gear, feeding driving gear and saidly retreat driven gear, the feeding driven gear is corresponding respectively is in transmission connection;
The said driving gear of retreating is provided with a direction and follows driving shaft and rotate synchronously the unidirectional transmission that another direction is then freely rotated around driving shaft; Said feeding driven gear is provided with a direction and follows the unidirectional transmission that another direction of the synchronous rotation of driven axle is then freely rotated around driven axle, and the servo-actuated of said two non-return devices and driving shaft or driven axle is in the opposite direction;
Said planetary gear, rotating non-constant speed output gear wheels and torsion clutch all are installed in the said transmission case body.
Preferably, said torsion clutch comprises power input shaft, power output shaft, moment of torsion output slide block, spring, connection ball and supporting seat;
Said power input shaft one end and said driven axle are in transmission connection;
Said power input shaft is arranged with said supporting seat, spring, moment of torsion output slide block and power output shaft successively from said driven axle one side direction opposite side; Said supporting seat is fixedly connected on the said power input shaft, and said moment of torsion output slide block and power output shaft slip cap are located on the said power input shaft;
Said moment of torsion output slide block and said power input shaft are provided with the helical groove of mutual coupling, are embedded with said connection ball in the said helical groove;
The one side that said moment of torsion output slide block and power output shaft are in contact with one another is equipped with projection;
An end and the said actuating unit away from said moment of torsion output slide block of said power output shaft are in transmission connection.
Preferably, the contact-making surface between the said projection is processed with circular arc chamfering.
Preferably, said retreat driving gear, feeding driving gear and saidly retreat driven gear, the corresponding respectively coupling of feeding driven gear is connected with a joggle.
Preferably, comprise also and retreat reduction box and feeding reduction box that the said driving gear, feeding driving gear retreated retreated reduction box and the corresponding coupling of feeding reduction box is connected with a joggle through said respectively with said driven gear, the feeding driven gear retreated.
Preferably, said unidirectional transmission is that a direction is followed driving shaft or driven axle and rotated unilateral bearing, one-way clutch or the ratchet that another direction is then freely rotated around driving shaft or driven axle synchronously.
Preferably, the gear ratio of said feeding driving gear and said feeding driven gear less than retreat driving gear with retreat driven gear gear ratio.
Preferably; Said planetary gear comprises sun gear, at least two planetary gears and planet carrier; Said sun gear is connected with said power shaft fixing coaxial, and said at least two planetary gears all are rotationally connected with on the said planet carrier, and said output shaft is fixedly connected on the rotating shaft of said planet carrier.
Preferably, be connected through bearing between said power output shaft and the said power input shaft.
Preferably, said lathe anti-pinch device also is provided with in order to detect the sensor of moment of torsion, moment of torsion output slide block corner or moment of torsion output slide position, and said sensor is electrically connected with said dynamical system.
Adopt the beneficial effect of present technique scheme to be: adopt two covers unidirectional transmission in the opposite direction, can retreat fast and feeding at a slow speed through the actuating unit of simple structure realization lathe, simple in structure, cost is low, and fault rate and maintenance cost are low.Simultaneously, in same transmission case body, between the actuating unit of the dynamical system of said lathe and said lathe, be provided with torsion clutch, make lathe when feeding is obstructed; Moment of torsion on the power transmission shaft increases, and torsion clutch is threaded off, and lathe is kept harmless chucking power; And motor can not burn by stall, cooperates this moment the counter-rotating of control circuit control motor to retreat, and this device is the anti-blocking rotary device of mechanical type; Simple in structure, cost is low, and fault rate is low and safe and reliable.Simultaneously said apparatus and planetary gear speed-reduction geared system are integrated and be installed in the same transmission case body; Overcome the problem of mechanical driving device function singleness, make whole transmission case can be integrated completion mechanical type rotating different rotating speeds output and prevent the requirement of stall.
Description of drawings
Fig. 1 is the sketch map of a kind of lathe one of the present invention transmission case;
Fig. 2 is the sketch map when torsion clutch links among the present invention;
Fig. 3 is the decomposing schematic representation of torsion clutch among the present invention.
The numeral corresponding component title represented among the figure with letter:
1. dynamical system 2. is retreated driving gear 3. driving shafts 4. feeding driving gears
5. retreat driven gear 6. driven axles 7. feeding driven gears 8. actuating units
9. transmission case body 10. external toothings 11. planetary gears 12. sun gears 13. planet carriers
14. torsion clutch 22. power input shafts 23. supporting seats 24. springs 25. connect ball
26. moment of torsion output slide block 27. power output shafts 29. projections
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further detailed explanation.
Embodiment 1,
Like Fig. 1, Fig. 2, shown in Figure 3, a kind of lathe one transmission case comprises:
A kind of lathe one transmission case comprises:
The non-constant speed output gear of transmission case body 9, planetary gear and rotating wheels;
The non-constant speed output gear of said rotating wheels are provided with the driving shaft 3 of torque input and the driven axle 6 of output torque, and retreat driving gear 2, feeding driving gear 4, retreat driven gear 5 and feeding driven gear 7;
Said driving shaft 3 is in transmission connection with said planetary output shaft, and the dynamical system 1 of said planetary power shaft and said lathe is in transmission connection; Said planetary gear comprises sun gear 12, two planetary gears 11 and planet carriers 13; Said sun gear 12 is connected with said power shaft fixing coaxial; Said two planetary gears 11 all are rotationally connected with on the said planet carrier 13, and said output shaft is fixedly connected on the rotating shaft of said planet carrier 13.
Between the actuating unit 8 of said driven axle 6 and said lathe, also be provided with torsion clutch 14; Said torsion clutch 14 comprises power input shaft 22 and power output shaft 27;
Saidly retreat driven gear 5 and feeding driven gear 7 coaxial being connected on the driven axle 6; Said driven axle 6 is in transmission connection with the power input shaft 22 of said torsion clutch 14, and the power output shaft 27 of said torsion clutch 14 is in transmission connection with the actuating unit 8 of lathe;
Said retreat driving gear 2, feeding driving gear 4 and saidly retreat driven gear 5, feeding driven gear 7 is corresponding respectively is in transmission connection;
The said driving gear 2 of retreating is provided with a direction and follows driving shaft 3 and rotate the unidirectional transmission that another directions are then freely rotated around driving shaft 3 synchronously; Said feeding driven gear 7 is provided with a direction and follows the unidirectional transmission that driven axle 6 synchronous another directions of rotation are then freely rotated around driven axle 6, and the servo-actuated of said two non-return devices and driving shaft 3 or driven axle 6 is in the opposite direction; Said retreat driving gear 2, feeding driving gear 4 and saidly retreat driven gear 5, the corresponding respectively coupling of feeding driven gear 7 is connected with a joggle.The gear ratio of said feeding driving gear 4 and said feeding driven gear 7 less than retreat driving gear 2 with retreat driven gear 5 gear ratio.
Above-mentioned unidirectional transmission is that a direction is followed driving shaft 3 or driven axle 6 and rotated unilateral bearing, one-way clutch or the ratchet that another directions are then freely rotated around driving shaft 3 or driven axle 6 synchronously.
Said planetary gear, rotating non-constant speed output gear wheels and torsion clutch 14 all are installed in the said transmission case body 9.
Said torsion clutch 14 comprises power input shaft 22, power output shaft 27, moment of torsion output slide block 26, spring 24, connects ball 25 and supporting seat 23;
Said power input shaft 22 1 ends and said driven axle 6 are in transmission connection;
Said power input shaft 22 is arranged with said supporting seat 23, spring 24, moment of torsion output slide block 26 and power output shaft 27 successively from said driven axle 6 one side direction opposite sides; Said supporting seat 23 is fixedly connected on the said power input shaft 22, and said moment of torsion output slide block 26 is located on the said power input shaft 22 with power output shaft 27 slip caps;
Said moment of torsion output slide block 26 and said power input shaft 22 are provided with the helical groove of mutual coupling, are embedded with said connection ball 25 in the said helical groove;
Said moment of torsion output slide block 26 is equipped with projection 29 with the one side that power output shaft 27 is in contact with one another;
An end and the said actuating unit 8 away from said moment of torsion output slide block 26 of said power output shaft 27 are in transmission connection.
Contact-making surface during said machine tool feed between the said projection 29 is processed with circular arc chamfering.
Its operation principle is when retreating, to start dynamical system 1; Drive sun gear 12 and rotate, sun gear 12 drives planetary gear 11 and rotates around sun gear 12, and planetary gear 11 drives planet carrier 13 and rotates; Planet carrier 13 drives driving shaft 3 and rotates, and driving shaft 3 drives retreats driving gear 2 rotations, and driving gear 2 drives are retreated driven gear 5 and rotated; Retreat driving gear 5 and drive driven axle 6 rotations, driven axle 6 drives torsion clutches 14 and rotates, and torsion clutch 14 drives lathe actuating units 8 and retreats fast; Feeding this moment driven gear 7 also rotates along with driven axle 6, and it drives feeding driving gear 4 and rotates, because the existence of unidirectional transmission; Feeding this moment driving gear 4 rotates freely around driving shaft 3, and does not have the transmission of moment and energy, is equivalent to the gear relevant with feeding and all has neither part nor lot in work.Otherwise, when feeding, dynamical system 1 counter-rotating; The planetary gear counter-rotating drives driving shaft 3 counter-rotatings, feeding this moment driving gear 4 and 7 work of feeding driven gear; Driving torsion clutch 14 rotates; Torsion clutch 14 drives 8 feedings of lathe actuating units because the gear ratio of feeding driving gear 4 and said feeding driven gear 7 less than retreat driving gear 2 with retreat driven gear 5 gear ratio, therefore realized that astern speed is greater than feed speed.Present embodiment has realized in an integral type transmission case, realizing the requirement of integrated completion mechanical type rotating different rotating speeds output.Omitted complicated electrical speed regulation control system.It is little to have volume, and cost is low, the reliability advantages of higher.
Wherein, the operation principle of torsion clutch 14 is, during inactive state; Moment of torsion output slide block 26 is under the effect of spring 24; Be on the moment of torsion output station, at this moment, connect ball 25 and be in bolt indentation near supporting seat 23 1 sides; The projection 29 of moment of torsion output slide block 26 and power output shaft 27 intersects nested, and moment of torsion output this moment slide block 26 and power output shaft 27 are owing to the existence of projection 29 can be rotated together.When lathe started the feeding switch, dynamical system 1 drove power input shaft 22 rotations through driving driven axle 6, owing to connect the effect of ball 25 and spring 24, moment of torsion output slide block 26 is followed rotation; Under the effect of projection 29, power output shaft 27 rotates and drives actuating unit 8 feedings, finishes up to the feeding process; If in the feeding process, meet with obstruction, reverse power output shaft 27 and the moment of torsion output slide block 26 of passing to of the resistance that lathe runs into is when resistance is enough big; Overcome the pressure of spring 24, force moment of torsion output slide block 26 and power output shaft 22 that relative motion takes place, under the effect that connects ball 25 and helical groove; Moment of torsion output slide block 26 connects ball 5 and finally is in helical groove near power output shaft 7 one sides, at this moment to supporting seat 23 1 side shiftings; The projection 29 of moment of torsion output slide block 26 and power output shaft 27 breaks away from each other, the action of lathe feed-disabling, and dynamical system 1 drive moment of torsion output slide block 26 is rotated further; When projection 29 turns to nested position, under the effect of spring 24, moment of torsion output slide block 26 is retracted original position; If this moment, obstacle was removed, then lathe continues to accomplish feed motion, if obstacle is not removed; Then the projection 29 of moment of torsion output slide block 26 and power output shaft 27 breaks away under the effect of resistance each other, goes round and begins again, and disappears up to resistance.
Adopt the beneficial effect of present technique scheme to be: adopt two covers unidirectional transmission in the opposite direction, can realize retreating fast and feeding at a slow speed of lathe through simple structure, simple in structure, cost is low, and fault rate and maintenance cost are low.Simultaneously, in same transmission case body, between the actuating unit of the dynamical system of said lathe and said lathe, be provided with torsion clutch, make lathe when feeding is obstructed; Moment of torsion on the power transmission shaft increases, and torsion clutch is threaded off, and lathe is kept harmless chucking power; And motor can not burn by stall, cooperates this moment the counter-rotating of control circuit control motor to retreat, and this device is the mechanical type anti-pinch device; Simple in structure, cost is low, fault rate and safe and reliable.Simultaneously said apparatus and planetary gear speed-reduction geared system are integrated and be installed in the same transmission case body; Overcome the problem of mechanical driving device function singleness, make whole transmission case can be integrated completion mechanical type rotating different rotating speeds output and prevent the requirement of stall.
Embodiment 2,
All the other are identical with embodiment 1, and difference is that said lathe anti-pinch device also is provided with in order to detect the sensor of moment of torsion, moment of torsion output slide block 6 corners or moment of torsion output slide block 6 positions, and said sensor is electrically connected with said dynamical system.When meeting with obstruction, sensor detects correlated variables, and 1 counter-rotating of control dynamical system is retreated actuating unit 8, is beneficial to remove fault.
Above-described only is preferred implementation of the present invention, should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the invention design, can also make some distortion and improvement, and these all belong to protection scope of the present invention.
Claims (10)
1. a lathe one transmission case is characterized in that, comprising:
The non-constant speed output gear of transmission case body, planetary gear and rotating wheels;
The non-constant speed output gear of said rotating wheels are provided with the driving shaft of torque input and the driven axle of output torque, and retreat driving gear, feeding driving gear, retreat driven gear and feeding driven gear;
Said driving shaft and said planetary output shaft are in transmission connection, and the dynamical system of said planetary power shaft and said lathe is in transmission connection;
Between the actuating unit of said driven axle and said lathe, also be provided with torsion clutch; Said torsion clutch comprises power input shaft and power output shaft;
Saidly retreat driven gear and the feeding driven gear is coaxial is connected on the driven axle, the power input shaft of said driven axle and said torsion clutch is in transmission connection, and the power output shaft of said torsion clutch and the actuating unit of lathe are in transmission connection;
Said retreat driving gear, feeding driving gear and saidly retreat driven gear, the feeding driven gear is corresponding respectively is in transmission connection;
The said driving gear of retreating is provided with a direction and follows driving shaft and rotate synchronously the unidirectional transmission that another direction is then freely rotated around driving shaft; Said feeding driven gear is provided with a direction and follows the unidirectional transmission that another direction of the synchronous rotation of driven axle is then freely rotated around driven axle, and the servo-actuated of said two non-return devices and driving shaft or driven axle is in the opposite direction;
Said planetary gear, rotating non-constant speed output gear wheels and torsion clutch all are installed in the said transmission case body.
2. lathe one transmission case according to claim 1 is characterized in that, said torsion clutch comprises power input shaft, power output shaft, moment of torsion output slide block, spring, connection ball and supporting seat;
Said power input shaft one end and said driven axle are in transmission connection;
Said power input shaft is arranged with said supporting seat, spring, moment of torsion output slide block and power output shaft successively from said driven axle one side direction opposite side; Said supporting seat is fixedly connected on the said power input shaft, and said moment of torsion output slide block and power output shaft slip cap are located on the said power input shaft;
Said moment of torsion output slide block and said power input shaft are provided with the helical groove of mutual coupling, are embedded with said connection ball in the said helical groove;
The one side that said moment of torsion output slide block and power output shaft are in contact with one another is equipped with projection;
An end and the said actuating unit away from said moment of torsion output slide block of said power output shaft are in transmission connection.
3. lathe one transmission case according to claim 2 is characterized in that the contact-making surface between the said projection is processed with circular arc chamfering.
4. lathe one transmission case according to claim 2 is characterized in that, said retreat driving gear, feeding driving gear and saidly retreat driven gear, the corresponding respectively coupling of feeding driven gear is connected with a joggle.
5. lathe one transmission case according to claim 2; It is characterized in that; Comprise also and retreat reduction box and feeding reduction box that the said driving gear, feeding driving gear retreated retreated reduction box and the corresponding coupling of feeding reduction box is connected with a joggle through said respectively with said driven gear, the feeding driven gear retreated.
6. according to the arbitrary described lathe one transmission case of claim 1 to 5; It is characterized in that said unidirectional transmission is that a direction is followed driving shaft or driven axle and rotated unilateral bearing, one-way clutch or the ratchet that another direction is then freely rotated around driving shaft or driven axle synchronously.
7. lathe one transmission case according to claim 6 is characterized in that, the gear ratio of said feeding driving gear and said feeding driven gear less than retreat driving gear with retreat driven gear gear ratio.
8. lathe one transmission case according to claim 6; It is characterized in that; Said planetary gear comprises sun gear, at least two planetary gears and planet carrier; Said sun gear is connected with said power shaft fixing coaxial, and said at least two planetary gears all are rotationally connected with on the said planet carrier, and said output shaft is fixedly connected on the rotating shaft of said planet carrier.
9. according to the arbitrary described lathe one transmission case of claim 2 to 5, it is characterized in that, be connected through bearing between said power output shaft and the said power input shaft.
10. lathe one transmission case according to claim 9 is characterized in that, said lathe anti-pinch device also is provided with in order to detect the sensor of moment of torsion, moment of torsion output slide block corner or moment of torsion output slide position, and said sensor is electrically connected with said dynamical system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100522027A CN102653066A (en) | 2011-03-04 | 2011-03-04 | Integrated transmission case for machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100522027A CN102653066A (en) | 2011-03-04 | 2011-03-04 | Integrated transmission case for machine tool |
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| Publication Number | Publication Date |
|---|---|
| CN102653066A true CN102653066A (en) | 2012-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100522027A Pending CN102653066A (en) | 2011-03-04 | 2011-03-04 | Integrated transmission case for machine tool |
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| CN (1) | CN102653066A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105798703A (en) * | 2016-06-07 | 2016-07-27 | 于法周 | Automatic fault detecting device for main transmission of lathe |
| CN104600901B (en) * | 2013-10-31 | 2017-08-18 | 北京精密机电控制设备研究所 | A kind of four remaining electromechanical coupling systems |
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| GB191315499A (en) * | 1913-03-07 | 1914-07-02 | Emile Peuch | Improvements in or relating to Apparatus for use as a Clutching, Coupling, or Locking Device and the like. |
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| CN202001564U (en) * | 2011-03-04 | 2011-10-05 | 张家港市九鼎机械有限公司 | Integrated transmission box of electrically operated gate |
| CN202070940U (en) * | 2011-03-04 | 2011-12-14 | 张家港市九鼎机械有限公司 | Integrated transmission case of machine tool |
| CN102654178A (en) * | 2011-03-04 | 2012-09-05 | 张家港市九鼎机械有限公司 | Integrated transmission case for electronically operated gate |
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- 2011-03-04 CN CN2011100522027A patent/CN102653066A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190901704A (en) * | 1909-01-23 | 1910-01-24 | Luis Wirtz | Improvements in Clutches. |
| GB191315499A (en) * | 1913-03-07 | 1914-07-02 | Emile Peuch | Improvements in or relating to Apparatus for use as a Clutching, Coupling, or Locking Device and the like. |
| CN2142929Y (en) * | 1992-11-25 | 1993-09-29 | 胶州市红旗工业锅炉配套设备厂 | Reducer for boiler |
| CN2198143Y (en) * | 1994-06-18 | 1995-05-24 | 巫东和 | Motor driving high and low speed regulator |
| CN2403613Y (en) * | 2000-01-03 | 2000-11-01 | 赵天云 | Varable-speed gear through motor front-back reversing to realize gear shifting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600901B (en) * | 2013-10-31 | 2017-08-18 | 北京精密机电控制设备研究所 | A kind of four remaining electromechanical coupling systems |
| CN105798703A (en) * | 2016-06-07 | 2016-07-27 | 于法周 | Automatic fault detecting device for main transmission of lathe |
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Application publication date: 20120905 |