CN201818748U - Anti-backlash transmission case for linear motion on rack - Google Patents

Anti-backlash transmission case for linear motion on rack Download PDF

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Publication number
CN201818748U
CN201818748U CN201020541314XU CN201020541314U CN201818748U CN 201818748 U CN201818748 U CN 201818748U CN 201020541314X U CN201020541314X U CN 201020541314XU CN 201020541314 U CN201020541314 U CN 201020541314U CN 201818748 U CN201818748 U CN 201818748U
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China
Prior art keywords
gear
transmission case
worm
input shaft
power input
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Expired - Fee Related
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CN201020541314XU
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Chinese (zh)
Inventor
杜明乾
杨建民
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杜明乾
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Priority to CN201020541314XU priority Critical patent/CN201818748U/en
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Publication of CN201818748U publication Critical patent/CN201818748U/en
Anticipated expiration legal-status Critical
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Abstract

The utility model discloses an anti-backlash transmission case for linear motion on a rack, and belongs to the technical field of machining equipment. The anti-backlash transmission case mainly comprises a power input shaft, a first power output shaft and a second power output shaft, which are rotationally mounted on a transmission case body, wherein the first power output shaft is in transmission connection with the power input shaft through a first gear pair, the second power output shaft is in transmission connection with the power input shaft through a second gear pair, the first gear pair comprises a first worm gear and a first worm, the second gear pair comprises a second worm gear and a second worm, the second worm gear is fixedly mounted on the second power output shaft, the second worm is mounted on the power input shaft in a sliding manner through a spline, and elastic devices are clamped and pressed on two sides of the second worm respectively. The anti-backlash transmission case is simple in structure, and can not only overcome the impacts of the gear transmission case on transmission precision during the gear-rack transmission, but also reduce production and manufacturing costs.

Description

Be used for straight-line gap eliminating transmission case on the tooth bar
Technical field
The utility model relates to the machining equipment technical field, relates in particular to the straight-line gap eliminating transmission case on the tooth bar that is used for that a kind of lathe uses.
Background technique
In field of machining, the application of large size machine tool more and more widely, and is also more and more higher to the requirement on machining accuracy of large size machine tool.Large size machine tool adopt ball screw structure or gear ﹠ rack structure to realize the transmission of long stroke usually, these two kinds of kinds of drive respectively have pluses and minuses, the ball screw transmission need overcome the deformation effect that action of gravity produces screw mandrel, and the gear rack transmission need overcome the influence of gear to transmission accuracy.On stroke surpasses 6 meters large size machine tool, gear rack transmission application more relatively.
In transmission process, the existence owing to machining error or assembly error makes to have backlash between pitch wheel and tooth bar, therefore the machining accuracy that can produce the transmission noise and influence lathe.Influence on the problem of transmission accuracy at the solution gear, the normal bidentate wheel-tooth bar drive mechanism crack that disappears of adopting, to guarantee transmission accuracy, bidentate wheel-tooth bar drive mechanism is because rely on two groups of helical gear pair transmissions that rotation direction is opposite, a power input shaft and two ptos are installed on transmission case body, and between power input shaft and each root pto, also be provided with a middle transition axle, be in transmission connection by helical gear pair between power input shaft and the middle transition axle, be in transmission connection by gear pair between pto and the middle transition axle, its complex structure, the manufacturing cost height.
The model utility content
Technical problem to be solved in the utility model is: a kind of straight-line gap eliminating transmission case on the tooth bar that is used for is provided, and simple in structure, gear has reduced manufacturing cost again to the influence of transmission accuracy in the time of can either overcoming the gear rack transmission.
For solving the problems of the technologies described above, the technical solution of the utility model is: be used for straight-line gap eliminating transmission case on the tooth bar, comprise transmission case body; Power input shaft, described power input shaft rotates and is installed on the described transmission case body; Be used to connect first pto of first gear that meshes with described tooth bar, described first pto rotates and is installed on the described transmission case body, and described first pto and power input shaft are in transmission connection by first gear pair; Be used to connect second pto of second gear that meshes with described tooth bar, described second pto rotates and is installed on the described transmission case body, and described second pto and power input shaft are in transmission connection by second gear pair; Described second gear pair comprises second worm gear, and described second worm gear is fixedly installed on described second pto; Second worm screw, described second worm screw is slidingly mounted on the described power input shaft by spline, and the both sides of described second worm screw all are clamped with elastic device.
As a kind of improvement, described first gear pair comprises first worm gear, and described first worm gear is fixedly installed on described first pto; First worm screw, described first worm screw is fixedly installed on the described power input shaft.
As further improvement, described elastic device comprises one group of belleville spring of combining.
As further improvement, a free end of described one group of belleville spring leans on the end face of described second worm screw, and another free end relies on the nut that matches with described power input shaft.
After having adopted technique scheme, the beneficial effects of the utility model are: since transmission case body on be rotatablely equipped with power input shaft and with first pto and second pto that power input shaft is in transmission connection, make transmission case to move at the driving lower edge of power plant rack linear; Because second worm screw is slidingly mounted on the power input shaft by spline, the both sides of second worm screw all are clamped with elastic device, make second gear on second pto keep engagement with tooth bar constantly, and when first wheel and rack does not mesh, elastic device is given second worm screw, one pretightening force, makes second worm drive, second worm gear rotate, and drives second gear to transmission case activation force in a flash, therefore lathe is operated steadily, machining accuracy is guaranteed; Compare with helical gear pair transmission backlash eliminating equipment commonly used, adopt two cover worm and gear transmission gap-eliminating structures to obtain simplifying, saved material, reduced the manufacturing cost.
Because two groups of belleville springs lean respectively at the both sides of second worm screw and the end face of two nuts, can realize pretightening force by adjusting nut to second worm screw, when not meshing to be implemented in first wheel and rack, the engagement of second wheel and rack drives transmission case and continues motion.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the utility model embodiment's a structural representation;
Fig. 2 is the cross-sectional schematic of A-A among Fig. 1;
Among the figure: 1, transmission case body, 2, power input shaft, 3, first pto, 4, first worm screw, 5, first worm gear, 6, second pto, 7, second worm screw, 8, second worm gear, 9, belleville spring, 10, nut, 11, tooth bar, 12, first gear, 13, second gear.
Embodiment
As depicted in figs. 1 and 2, a kind ofly be used for straight-line gap eliminating transmission case on the tooth bar, mainly comprise transmission case body 1, power input shaft 2, first pto 3, second pto 6.Wherein, described power input shaft 2 rotates and is installed on the described transmission case body 1; Described first pto 3 rotates and is installed on the described transmission case body 1, is used to connect first gear 12 that meshes with described tooth bar 11, and described first pto 3 is in transmission connection by first gear pair with power input shaft 2; Described second pto 6 rotates and is installed on the described transmission case body 1, be used to connect second gear 13 that meshes with described tooth bar 11, described second pto 6 is in transmission connection by second gear pair with power input shaft 2, and second pto 6 parallels with the axis of first pto 3.Described first gear pair comprises first worm gear 5 and first worm screw 4, and described first worm gear 5 is fixedly installed on described first pto 3, and described first worm screw 4 is fixedly installed on the described power input shaft 2.Described second gear pair comprises second worm gear 8 and second worm screw 7, described second worm gear 8 is fixedly installed on described second pto 6, described second worm screw 7 is slidingly mounted on the described power input shaft 2 by spline, and the both sides of described second worm screw 7 all are clamped with elastic device.Described elastic device comprises one group of belleville spring of combining 9, and its compound mode adopts two adjacent belleville springs 9 pairing use relatively.A free end of described one group of belleville spring 9 leans on the end face of described second worm screw 7, another free end relies on the nut 10 that matches with described power input shaft 2, can realize pretightening force by adjusting nut 10 to second worm screw 7, when not meshing with tooth bar 11 to be implemented in first gear 12, second gear 13 and tooth bar 11 engagements drive transmission case and continue motion.
Its working principle is as follows:
During assembling, adjust nut 10, two groups of belleville springs 9 are compressed in advance, give second worm screw, 7 one pretightening forces.In the lathe working procedure, power passes to first gear 12 and second gear 13 by power input shaft 2 by first transmission shaft and second transmission shaft, drive transmission case body 1 straight line motion on tooth bar 11, according to theoretical value, first gear 12 and second gear 13 mesh with tooth bar 11 simultaneously in the walking process, and first gear 12 or second gear 13 all can have about 1.5 teeth and tooth bar 11 engagements, steadily transmission.But owing to the existence of machining error and assembly error, add the wearing and tearing of the flank of tooth, first gear 12 and tooth bar 11 out of mesh situations will occur, therefore the gap occurs, influence machining accuracy.At this moment, because second worm screw 7 is slidingly mounted on the power input shaft 2 by spline, the both sides of second worm screw 7 all are clamped with belleville spring 9, make second worm gear 8 drive second gear 13 in the rotation that does not constantly stop, second gear 13 meshes together with tooth bar 11 constantly, eliminated because of first gear 12 does not mesh the gap that produces with tooth bar 11, eliminated the transmission noise, improved the machining accuracy of lathe.
In transmission process, when the space width of the space width on the tooth bar 11 and first gear 12 and second gear 13 is unequal, second worm screw 7 can compress a wherein side belleville spring 9, so second gear 13 will turn over an angle, automatically compensate unequal space width, make stable drive, further improved the machining accuracy of lathe.
The utility model is not limited to above-mentioned concrete mode of execution, and those of ordinary skill in the art is from above-mentioned design, and without performing creative labour, all conversion of having done all drop within the protection domain of the present utility model.

Claims (4)

1. be used for straight-line gap eliminating transmission case on the tooth bar, comprise
Transmission case body;
Power input shaft, described power input shaft rotates and is installed on the described transmission case body;
Be used to connect first pto of first gear that meshes with described tooth bar, described first pto rotates and is installed on the described transmission case body, and described first pto and power input shaft are in transmission connection by first gear pair;
Be used to connect second pto of second gear that meshes with described tooth bar, described second pto rotates and is installed on the described transmission case body, and described second pto and power input shaft are in transmission connection by second gear pair; It is characterized in that:
Described second gear pair comprises
Second worm gear, described second worm gear are fixedly installed on described second pto;
Second worm screw, described second worm screw is slidingly mounted on the described power input shaft by spline, and the both sides of described second worm screw all are clamped with elastic device.
2. as claimed in claim 1ly be used for straight-line gap eliminating transmission case on the tooth bar, it is characterized in that: described first gear pair comprises
First worm gear, described first worm gear are fixedly installed on described first pto;
First worm screw, described first worm screw is fixedly installed on the described power input shaft.
3. as claimed in claim 2ly be used for straight-line gap eliminating transmission case on the tooth bar, it is characterized in that: described elastic device comprises one group of belleville spring of combining.
4. as claimed in claim 3ly be used for straight-line gap eliminating transmission case on the tooth bar, it is characterized in that: a free end of described one group of belleville spring leans on the end face of described second worm screw, and another free end relies on the nut that matches with described power input shaft.
CN201020541314XU 2010-09-19 2010-09-19 Anti-backlash transmission case for linear motion on rack Expired - Fee Related CN201818748U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201020541314XU CN201818748U (en) 2010-09-19 2010-09-19 Anti-backlash transmission case for linear motion on rack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201020541314XU CN201818748U (en) 2010-09-19 2010-09-19 Anti-backlash transmission case for linear motion on rack

Publications (1)

Publication Number Publication Date
CN201818748U true CN201818748U (en) 2011-05-04

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102330800A (en) * 2011-05-18 2012-01-25 张其明 Transmission of spiral wheel
CN102676184A (en) * 2012-05-08 2012-09-19 吴小杰 Horizontal braking torque self-increased cycloid-rack coke pushing device
CN102676182A (en) * 2012-05-08 2012-09-19 吴小杰 Horizontal braking torque self-increased cycloid-rack coke pushing device
CN102676186A (en) * 2012-05-08 2012-09-19 吴小杰 Horizontal braking torque self-increased less differential-rack coke pushing device
CN102676185A (en) * 2012-05-08 2012-09-19 吴小杰 Horizontal braking moment self-energizing cycloid-rack pushing device
CN102676183A (en) * 2012-05-08 2012-09-19 吴小杰 Self-incrementing cycloidal-gear coke pushing device of horizontal type braking moment
CN102699399A (en) * 2012-05-28 2012-10-03 南通京鼎机械科技有限公司 Programmable planomiller cylindrical surface spiral groove milling auxiliary system
CN103121631A (en) * 2011-11-18 2013-05-29 吴小杰 Permanent-magnet and constant-braking outer cylinder inner cycloidal reduction winch
CN103121632A (en) * 2011-11-18 2013-05-29 吴小杰 Permanent-magnet and constant-braking outer cylinder small-tooth-difference reduction winch
CN103121630A (en) * 2011-11-18 2013-05-29 吴小杰 Permanent-magnet and constant-braking outer cylinder cycloidal reduction winch
CN103374373A (en) * 2012-04-25 2013-10-30 吴小杰 Horizontal involute few tooth difference-rack driven coke pushing device
CN103374359A (en) * 2012-04-25 2013-10-30 吴小杰 Horizontal cycloid-rack driven coke pushing device
CN103387838A (en) * 2012-05-08 2013-11-13 吴小杰 Horizontal braking torque self-increased few tooth difference-gear rack coke-pushing device
CN103742600A (en) * 2013-12-13 2014-04-23 中国航空工业集团公司北京航空精密机械研究所 Large-load speed reducing and gap removing mechanism with plane secondary enveloping ring worm gear pairs
CN105414995A (en) * 2015-12-30 2016-03-23 沈机集团昆明机床股份有限公司 Transmission device, driving system adopting same as well as rotating table
CN107183992A (en) * 2017-05-18 2017-09-22 张渝 A kind of all surface seal structures of cabinet

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102330800A (en) * 2011-05-18 2012-01-25 张其明 Transmission of spiral wheel
CN103121631B (en) * 2011-11-18 2016-04-13 吴小杰 Permanent magnetism perseverance braking urceolus inner cycloid reducer winch
CN103121632B (en) * 2011-11-18 2015-09-02 陈伟 Permanent magnetism perseverance braking urceolus few teeth difference deceleration winch
CN103121630A (en) * 2011-11-18 2013-05-29 吴小杰 Permanent-magnet and constant-braking outer cylinder cycloidal reduction winch
CN103121631A (en) * 2011-11-18 2013-05-29 吴小杰 Permanent-magnet and constant-braking outer cylinder inner cycloidal reduction winch
CN103121632A (en) * 2011-11-18 2013-05-29 吴小杰 Permanent-magnet and constant-braking outer cylinder small-tooth-difference reduction winch
CN103374373B (en) * 2012-04-25 2015-07-29 陈伟 Horizontal involute less tooth difference-rack drives coke pusher
CN103374359B (en) * 2012-04-25 2014-09-17 吴小杰 Horizontal cycloid-rack driven coke pushing device
CN103374359A (en) * 2012-04-25 2013-10-30 吴小杰 Horizontal cycloid-rack driven coke pushing device
CN103374373A (en) * 2012-04-25 2013-10-30 吴小杰 Horizontal involute few tooth difference-rack driven coke pushing device
CN102676182B (en) * 2012-05-08 2013-10-16 吴小杰 Horizontal braking torque self-increased cycloid-rack coke pushing device
CN102676185B (en) * 2012-05-08 2013-10-16 吴小杰 Horizontal braking moment self-energizing cycloid-rack pushing device
CN102676184B (en) * 2012-05-08 2013-10-16 吴小杰 Horizontal braking torque self-increased cycloid-rack coke pushing device
CN102676184A (en) * 2012-05-08 2012-09-19 吴小杰 Horizontal braking torque self-increased cycloid-rack coke pushing device
CN102676183A (en) * 2012-05-08 2012-09-19 吴小杰 Self-incrementing cycloidal-gear coke pushing device of horizontal type braking moment
CN103387838A (en) * 2012-05-08 2013-11-13 吴小杰 Horizontal braking torque self-increased few tooth difference-gear rack coke-pushing device
CN102676183B (en) * 2012-05-08 2014-03-12 吴小杰 Self-incrementing cycloidal-gear coke pushing device of horizontal type braking moment
CN102676182A (en) * 2012-05-08 2012-09-19 吴小杰 Horizontal braking torque self-increased cycloid-rack coke pushing device
CN102676186B (en) * 2012-05-08 2014-07-30 吴小杰 Horizontal braking torque self-increased less differential-rack coke pushing device
CN102676185A (en) * 2012-05-08 2012-09-19 吴小杰 Horizontal braking moment self-energizing cycloid-rack pushing device
CN103387838B (en) * 2012-05-08 2014-09-17 吴小杰 Horizontal braking torque self-increased few tooth difference-gear rack coke-pushing device
CN102676186A (en) * 2012-05-08 2012-09-19 吴小杰 Horizontal braking torque self-increased less differential-rack coke pushing device
CN102699399A (en) * 2012-05-28 2012-10-03 南通京鼎机械科技有限公司 Programmable planomiller cylindrical surface spiral groove milling auxiliary system
CN103742600A (en) * 2013-12-13 2014-04-23 中国航空工业集团公司北京航空精密机械研究所 Large-load speed reducing and gap removing mechanism with plane secondary enveloping ring worm gear pairs
CN105414995A (en) * 2015-12-30 2016-03-23 沈机集团昆明机床股份有限公司 Transmission device, driving system adopting same as well as rotating table
CN107183992A (en) * 2017-05-18 2017-09-22 张渝 A kind of all surface seal structures of cabinet

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110504

Termination date: 20160919

CF01 Termination of patent right due to non-payment of annual fee