WO2009006756A1 - Équipement d'indexage à commande numérique avec dispositif de transmission à vis perfectionné - Google Patents

Équipement d'indexage à commande numérique avec dispositif de transmission à vis perfectionné Download PDF

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Publication number
WO2009006756A1
WO2009006756A1 PCT/CN2007/002106 CN2007002106W WO2009006756A1 WO 2009006756 A1 WO2009006756 A1 WO 2009006756A1 CN 2007002106 W CN2007002106 W CN 2007002106W WO 2009006756 A1 WO2009006756 A1 WO 2009006756A1
Authority
WO
WIPO (PCT)
Prior art keywords
worm
servo motor
shaft
base body
helical teeth
Prior art date
Application number
PCT/CN2007/002106
Other languages
English (en)
Chinese (zh)
Inventor
Zhengnan Wu
Original Assignee
Zhengnan Wu
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhengnan Wu filed Critical Zhengnan Wu
Priority to PCT/CN2007/002106 priority Critical patent/WO2009006756A1/fr
Publication of WO2009006756A1 publication Critical patent/WO2009006756A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
    • B23Q16/02—Indexing equipment
    • B23Q16/04—Indexing equipment having intermediate members, e.g. pawls, for locking the relatively movable parts in the indexed position
    • B23Q16/06—Rotary indexing
    • B23Q16/065—Rotary indexing with a continuous drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/54—Arrangements or details not restricted to group B23Q5/02 or group B23Q5/22 respectively, e.g. control handles
    • B23Q5/56—Preventing backlash
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/22—Toothed members; Worms for transmissions with crossing shafts, especially worms, worm-gears
    • F16H55/24—Special devices for taking up backlash

Definitions

  • the invention relates to a numerical control indexing device with an improved worm drive pair, which can easily adjust the backlash of the worm gear pair to an optimal state to obtain an optimal transmission effect.
  • the conventional numerical control indexing device includes a base body, an indexing plate body, a main shaft, a worm gear pair, a spindle locking mechanism, a servo motor, and a controller.
  • the main shaft and the worm are rotatably supported on the base body and the rotating shafts thereof are perpendicular to each other.
  • the indexing disc body is connected to the main shaft for clamping the workpiece to be processed, the worm wheel is fixedly mounted on the main shaft and meshed with the worm, and the worm is coupled to the servo motor.
  • the spindle locking mechanism includes a locking cylinder and a brake pad connected to the spindle.
  • the piston of the locking cylinder is in contact with the brake pad in the first position to limit the rotation of the spindle, and the second position is disengaged from the brake pad to allow the spindle to freely rotate.
  • the controller controls the servo motor to operate, drives the worm gear and worm wheel group to drive the spindle to rotate, and rotates the indexing disk to the required angle. Then the spindle locking mechanism acts to lock the spindle, and then the workpiece can be machining.
  • flank backlash tooth backlash
  • the flank backlash of the worm gear pair must be controlled to an ideal state. Because the backlash of the tooth surface is too large, it will generate a hollow motion, which will reduce the accuracy, which will cause the squeaking sound when rotating and adversely affect the processing effect; and the backlash of the tooth surface is too small or there is no backlash, which will cause poor lubrication, resulting in poor lubrication. The heat is stuck and the drive fails.
  • a worm gear pair capable of adjusting the backlash of the tooth surface has been proposed, for example, by using a double worm or a similar compensation mechanism to achieve the purpose of eliminating backlash, which is complicated in structure and difficult to adjust.
  • the complex pitch worm gear pair has a worm thread gradually increasing in thickness from one end to the other. Therefore, when the worm moves in the axial direction while meshing with the worm wheel, the backlash between the two can be adjusted to a desired degree.
  • the worm gear has two leads, one threaded surface of the worm thread has one lead and the other threaded surface has a slightly different lead. Its characteristics are that the number of meshing teeth is large, the transmission effect is accurate, and the backlash adjustment is easy. The disadvantages are complicated structure, difficult processing and high cost.
  • the Chinese utility model patent "CNC indexing device with combined worm” issued by the applicant and approved by the applicant is CN2897537, which is integrally coupled and rotatably supported on the substrate.
  • the two worms are arranged, and the helical teeth of the two worms are placed on both sides of the axial section of the worm gear perpendicular to the worm axis.
  • the two worms of the combined worm mesh with the worm gear from both sides, and can be adjusted to make the helical teeth close to or away from the worm wheel.
  • the outer flank of the tooth whereby the backlash can be easily adjusted to an optimum state for optimal engagement of each tooth.
  • An object of the present invention is to provide a numerically controlled indexing device having an improved worm drive pair and capable of easily adjusting the backlash of a worm worm gear pair to an optimum state in view of the deficiencies of the prior art.
  • the present invention provides a numerically controlled indexing device having an improved worm drive pair, comprising: a base body, a main shaft rotatably supported on the base body, a worm wheel mounted on the main shaft, and mounted on the A servo motor on a base body, further comprising: a worm shaft rotatably supported on the base body and drivingly coupled to the servo motor, and a worm that is axially movably fitted on the worm shaft
  • the worm has two axially symmetric helical teeth and the two segments The helical teeth are adjustably engaged with the outer tooth faces of the worm gear teeth from both sides of the axial direction.
  • both ends of the worm are detachably coupled to the worm shaft by a tightening ring and a coupling.
  • the end of the worm shaft is connected with a first transmission gear
  • the output shaft of the servo motor is connected with a second transmission gear
  • the first transmission gear meshes with the second transmission gear
  • the present invention is applied to a worm to form two axially symmetrical helical teeth, and after installation, the two helical teeth engage the worm gear from both sides.
  • the worm can be adjusted unilaterally so that the helical teeth are close to or away from the outer flank of the worm gear teeth, so that the backlash can be more easily adjusted to the optimum state for optimal engagement of each tooth.
  • the numerical control indexing device with combined worm provided by the invention has the advantages of simple structure, easy backlash adjustment, high transmission precision and strong practicability, and the two-stage helical teeth of the worm are integrally formed, and the manufacturing cost thereof is low.
  • Figure 1 is a front elevational view of a numerically controlled indexing device having a combined worm showing its external configuration.
  • Figure 2 is a plan view of Figure 1.
  • Figure 3 is a left side view of Figure 1.
  • Figure 4 is a cross-sectional view of Figure 3 showing the internal structure thereof.
  • Fig. 5 is a cross-sectional view of Fig. 1 showing the internal structure from the other direction. detailed description
  • a numerically controlled indexing device having a combined lever has a base body 1 in the form of a box having a rotatable indexing plate 2 and an indicator 3 in front of the base 1.
  • the front surface of the indexing disk 2 has a T-shaped groove 201 for clamping a workpiece.
  • the outer circumference of the indexing disc 2 has an angular value scale, which is indicated with The device 3 cooperates to indicate the rotation angle of the indexing disk 2.
  • An inlet port 101 for adding lubricating oil is disposed on a top surface of the base body 1, and an observation window 102 for indicating a lubricating oil surface inside the base body is provided on both sides of the base body 1, for use with a controller, a liquid/pneumatic driving device, and the like. Connected interface (not shown). On one side of the base body 1, there is an opening covered by a side cover 103, through which the worm adjustment can be performed.
  • the main body 1 is provided with a main shaft, a worm wheel, a worm mechanism, a servo motor, a transmission gear, a spindle locking mechanism, and an origin return mechanism.
  • the details are as follows:
  • the main shaft 4 is rotatably supported by the bearing housing 402 via a bearing 401.
  • the front end of the main shaft 4 is connected with an indexing plate holder 202, and the indexing plate body 2 is fixed to the indexing plate holder 202 to rotate with the spindle 4.
  • the spindle locking mechanism includes a lock cylinder mounted at a rear portion of the base body 1 near the main shaft 4, and a brake pad 801 fixed to a rear end of the main shaft 4.
  • the lock cylinder includes a cylinder block 802, a cylinder head 803, a piston 804, a return spring 805, and the like.
  • the worm gear 5 is fixedly mounted in the middle of the spindle 4 to drive the spindle 4 to rotate.
  • the worm mechanism includes a worm shaft 601 and a worm 602.
  • the worm shaft 601 and the worm 602 are coaxially fitted together and the two ends thereof are detachably coupled integrally by the pressing rings 603, 604 and the coupling 605.
  • the worm shaft 601 and the worm 602 are combined and rotatably supported on the bearing housing 608 by bearings 606, 607.
  • a transmission gear 609 is coupled to an end of the worm shaft 601.
  • the worm 602 has two axially symmetrical helical teeth.
  • the two helical teeth of the worm 602 are placed on both sides of the axial section a-a of the worm wheel 5 perpendicular to the worm axis, and the teeth of the worm gear 5 are meshed on both sides.
  • the outer tooth surface rotates to drive the worm wheel 5.
  • the side cover 103, servo motor 7 and associated fasteners can be removed, single side adjustment
  • the entire worm 602 has its helical teeth near or away from the outer flank of the worm 5 teeth, thereby adjusting the backlash to an optimum condition and optimally engaging each tooth.
  • the servo motor 7 is fixedly mounted on the motor support plate 701.
  • the output shaft of the servo motor 7 is connected with a transmission gear 702.
  • the transmission gear 702 meshes with the transmission gear 609 of the worm shaft 601, thereby driving the combined worm to rotate.
  • the home position returning mechanism includes an inductive ring 901 connected to the worm wheel 5 via the connecting base 904, and a micro switch 902 disposed adjacent to the inductive ring 901.
  • the induction ring 901 has a stop 903.
  • the microswitch 902 is electrically coupled to the controller.
  • the working principle is as follows: When the controller receives the reset command, the servo motor 7 drives the combined worm and the worm wheel 5 to rotate, and the induction ring 901 rotates accordingly, until the micro switch 902 touches the block 903, the micro switch The 902 feeds a signal to the controller to decelerate the servo motor 7 and stop the indexing disk 2 in the correct position.
  • the indicator 3 indicates the origin position of the scale value scale of the index body 2, which is generally the 0 degree angular scale position.
  • the present invention is used in a worm to form two axially symmetrical helical teeth, and after installation, the two helical teeth engage the worm gear from both sides.
  • the worm can be adjusted unilaterally so that the helical teeth are close to or away from the outer flank of the worm gear teeth, so that the backlash can be more easily adjusted to the optimum state, so that each tooth is optimally engaged.
  • the device provided by the invention has the advantages of simple structure, easy backlash adjustment, high transmission precision, low manufacturing cost and good industrial applicability.
  • the present invention has been described in detail by way of examples, but these descriptions are not to be construed as limiting the scope of the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gear Transmission (AREA)

Abstract

L'invention concerne un équipement d'indexage à commande numérique avec un dispositif de transmission à vis perfectionné, lequel équipement comprend un corps de base (1), un arbre principal (4) supporté à rotation sur le corps de base, une vis sans fin (5) se montant sur l'arbre principal, et un servo-moteur (7) s'installant dans le corps de base. L'équipement est caractérisé par le fait qu'il comprend en outre un arbre de vis (601) supporté à rotation sur le corps de base et relié au servo-moteur, et des manchons de vis (602) ajustés sur ledit arbre de vis. Lesdits manchons de vis ont deux sections de dents hélicoïdales disposées symétriquement dans la direction axiale, et lesdites deux sections de dents hélicoïdales peuvent être engagées de façon ajustable avec la surface extérieure des dents de ladite vis sans fin à partir de deux côtés axiaux. En raison du fait que deux sections de dents hélicoïdales sont formées sur les manchons de vis, on peut ajuster l'une d'elles pour la rapprocher ou l'éloigner de la surface extérieure des dents de ladite vis sans fin, et on peut ainsi ajuster visuellement le jeu d'engrènement d'une manière simple et amener chaque dent à atteindre le meilleur engagement. Cet équipement peut aisément ajuster le jeu d'engrènement et a une structure simple, une bonne précision de transmission, une aptitude au travail efficace et un coût de fabrication plus faible.
PCT/CN2007/002106 2007-07-09 2007-07-09 Équipement d'indexage à commande numérique avec dispositif de transmission à vis perfectionné WO2009006756A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/002106 WO2009006756A1 (fr) 2007-07-09 2007-07-09 Équipement d'indexage à commande numérique avec dispositif de transmission à vis perfectionné

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/002106 WO2009006756A1 (fr) 2007-07-09 2007-07-09 Équipement d'indexage à commande numérique avec dispositif de transmission à vis perfectionné

Publications (1)

Publication Number Publication Date
WO2009006756A1 true WO2009006756A1 (fr) 2009-01-15

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PCT/CN2007/002106 WO2009006756A1 (fr) 2007-07-09 2007-07-09 Équipement d'indexage à commande numérique avec dispositif de transmission à vis perfectionné

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WO (1) WO2009006756A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104339260A (zh) * 2014-10-17 2015-02-11 芜湖洪金机床有限公司 一种双节蜗杆分度头
CN109129009A (zh) * 2018-11-06 2019-01-04 南京众得利自动化机械有限公司 一种改变液动分度的快速分度装置
CN109176144A (zh) * 2018-11-14 2019-01-11 天津中嘉盛君精密机械有限公司 一种具有微调定位结构的分度盘
TWI692625B (zh) * 2019-05-10 2020-05-01 德川機械股份有限公司 測量背隙的方法、感測裝置及具有該感測裝置的分度盤裝置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2050504U (zh) * 1989-01-26 1990-01-03 齐锋 变齿厚圆柱齿轮蜗杆副
DE9010521U1 (fr) * 1990-07-12 1990-09-13 Steenbock, Carsten, 2000 Hamburg, De
EP0527121A1 (fr) * 1991-08-05 1993-02-10 IGM - ROBOTERSYSTEME Aktiengesellschaft Transmission pour entraînement d'une articulation notamment pour robot industriel
JPH05118409A (ja) * 1991-10-24 1993-05-14 Oki Electric Ind Co Ltd ウオームギヤ装置
US6386059B1 (en) * 2000-07-14 2002-05-14 Cone Drive Operations, Inc. Adjustable speed reducer assembly
CN2897537Y (zh) * 2006-04-05 2007-05-09 吴政男 具有组合式蜗杆的数控分度装置
CN1971094A (zh) * 2006-12-08 2007-05-30 宁新华 精密蜗轮蜗杆传动消隙装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2050504U (zh) * 1989-01-26 1990-01-03 齐锋 变齿厚圆柱齿轮蜗杆副
DE9010521U1 (fr) * 1990-07-12 1990-09-13 Steenbock, Carsten, 2000 Hamburg, De
EP0527121A1 (fr) * 1991-08-05 1993-02-10 IGM - ROBOTERSYSTEME Aktiengesellschaft Transmission pour entraînement d'une articulation notamment pour robot industriel
JPH05118409A (ja) * 1991-10-24 1993-05-14 Oki Electric Ind Co Ltd ウオームギヤ装置
US6386059B1 (en) * 2000-07-14 2002-05-14 Cone Drive Operations, Inc. Adjustable speed reducer assembly
CN2897537Y (zh) * 2006-04-05 2007-05-09 吴政男 具有组合式蜗杆的数控分度装置
CN1971094A (zh) * 2006-12-08 2007-05-30 宁新华 精密蜗轮蜗杆传动消隙装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104339260A (zh) * 2014-10-17 2015-02-11 芜湖洪金机床有限公司 一种双节蜗杆分度头
CN109129009A (zh) * 2018-11-06 2019-01-04 南京众得利自动化机械有限公司 一种改变液动分度的快速分度装置
CN109129009B (zh) * 2018-11-06 2024-03-22 南京众得利自动化机械有限公司 一种改变液动分度的快速分度装置
CN109176144A (zh) * 2018-11-14 2019-01-11 天津中嘉盛君精密机械有限公司 一种具有微调定位结构的分度盘
TWI692625B (zh) * 2019-05-10 2020-05-01 德川機械股份有限公司 測量背隙的方法、感測裝置及具有該感測裝置的分度盤裝置

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