CN103883708A - Gear rack transmission mechanism and gap elimination device for gear rack transmission mechanism - Google Patents
Gear rack transmission mechanism and gap elimination device for gear rack transmission mechanism Download PDFInfo
- Publication number
- CN103883708A CN103883708A CN201410116110.4A CN201410116110A CN103883708A CN 103883708 A CN103883708 A CN 103883708A CN 201410116110 A CN201410116110 A CN 201410116110A CN 103883708 A CN103883708 A CN 103883708A
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- CN
- China
- Prior art keywords
- sliding component
- rack
- guide rod
- gear
- nut
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
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Classifications
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- 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
- F16H55/26—Racks
- F16H55/28—Special devices for taking up backlash
- F16H55/283—Special devices for taking up backlash using pressure yokes
- F16H55/286—Special devices for taking up backlash using pressure yokes with asymmetric layout of the yoke
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- 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
- F16H55/26—Racks
- F16H55/28—Special devices for taking up backlash
- F16H2055/281—Cylindrical or half-cylindrical bushings around the rack, e.g. using special wedges to reduce play
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a gear rack transmission mechanism and a gap elimination device for the gear rack transmission mechanism. The gap elimination device comprises an installation base and a base, wherein the base is in running fit with the installation base and is provided with a gear. A guiding rod is arranged on the installation base. A sliding component used for drawing the installation base to enable the gear to the tightly attached to a rack is arranged on the guiding rod in sliding-fit mode. A driving mechanism used for driving the sliding component is further arranged on the guiding rod. A gap between the gear and the rack can be eliminated by driving the gear to move towards the rack, and the consumed manpower and material resources are less. The sliding component and the base respectively use a rotation pin shaft as a pivot. Compared with the base, the torque of the sliding component is larger, and therefore the base can be driven to move only by exerting smaller force on the sliding component. A belleville spring is arranged between a nut and the sliding component, screwing force exerted on the nut is firstly converted into tensioning force of the belleville spring, then the tensioning force is exerted on the sliding component, no damage is caused to the sliding component, and it is ensured that the gear and the rack can stably run.
Description
Technical field
The present invention relates to a kind of machine tool, the rack and pinion drive mechanism that is specifically related to a kind of rack and pinion drive mechanism backlash eliminating equipment and contains this backlash eliminating equipment.
Background technique
In numerical control machine tool servo feed drives, often adopt ball-screw nut driving mechanism, drive apart from servo feed for long, select rack and pinion drive mechanism.Gear rack transmission is applied very extensive in the transmission device of lathe, and its Main Function has: change moving direction, deceleration, increase moment of torsion etc.
But there is certain gap in rack and pinion engagement, in the time of reversing motion, also can there is backlass, this will affect transmission accuracy.In order to guarantee transmission accuracy and the stable working of NC machine tool feed system, must eliminate as far as possible the drive gap between gear rack.But there is certain error in gear rack and corresponding fixed pedestal, directly clamping can not make the engagement of gear rack reach required degree in reality processing and assembly process.And also there are certain wearing and tearing in gear rack, causes rack meshing clearance to change in the course of the work.
Dual-Servo Motor gear clearance elimination driving mode control technique is ripe at present, and still, this gap mode that disappears need to configure two cover actuating motor and drivers thereof, controls more complicated, and cost is high.In rack and pinion drive mechanism, add spring mechanism to realize the automatic adjustment in gear rack gap in addition, but its stability and reliability are lower.
The Chinese patent literature that is 200920353428.9 as application number discloses a kind of rack driving side gap adjusting device, supports the use with gear.This device comprises tooth bar and support, tooth bar is rack-mount and engage with gear, one side level of support protrudes out step, this step has orthogonal attachment face and supporting surface, attachment face is horizontal, on attachment face, offer screw, on tooth bar, offer and screw adjustment hole one to one, one end of one elastic element is fixed on supporting surface, the other end and tooth bar are conflicted, engage with screw one end of one adjusting screw, and the other end is arranged in adjustment hole and in adjustment hole and can flatly slides, and when wheel and rack engagement, adjustment hole slides along adjusting screw.Utilize the elasticity of elastic element to realize adjustment hole relative adjustment screw and there is adjustable distance, make wheel and rack when engagement active force each other can reach transient equiliblium, automatically adjusting gear tooth bar centre distance, makes tooth bar be close to gear engagement, reaches the object that regulates sideshake.
The deficiency of this device is, structure too complex, and manufacturing, assembling regulate difficulty too large; And this device is to eliminate gap between gear rack by mobile rack, and in most transmission systems, the length of tooth bar (taking up room) and intensity are all larger, should use very difficult.
Summary of the invention
The invention provides a kind of rack and pinion drive mechanism backlash eliminating equipment, this apparatus structure compactness, adjusts simply stable drive.
A kind of rack and pinion drive mechanism backlash eliminating equipment, comprise fitting seat and be rotatably assorted with fitting seat and fill cogged pedestal, described fitting seat is provided with guide rod, on this guide rod, be slidably matched be useful on traction fitting seat make gear be adjacent to the sliding component of tooth bar, on described guide rod, be also provided with the driving mechanism for driving sliding component.
As preferably, between fitting seat and pedestal, be rotatably assorted by revolution bearing pin.In the time that driving mechanism drives sliding component to slide along guide rod, sliding component is drawing the pedestal wraparound axial fitting seat direction motion of shipping and reselling on another market, gear just moves to tooth bar with pedestal, and wheel and rack contacts and apply certain load to tooth bar, thereby eliminates the gap existing between gear rack.And sliding component and pedestal are all take revolution bearing pin as fulcrum, but compared with pedestal, the moment of sliding component is larger, and therefore driving mechanism only need apply less power to sliding component, just can order about base motion, uses manpower and material resources sparingly.
The present invention moves to eliminate gap between the two by ordering about gear to tooth bar, and because of the volume of most gear rack transmission system middle gears or to occupy space all relatively little than tooth bar, therefore the spent manpower and materials of carrier wheel are all less.
In the present invention, described sliding component be fixedly connected with pedestal and with the pilot hole of guide rod Spielpassung.Sliding component can be tabular or shaft-like, and guide rod is through this pilot hole, and described driving mechanism is positioned at the side of sliding component away from fitting seat.Gap between guide rod and pilot hole has determined the displacement distance of sliding component on guide rod.
Driving mechanism various informative, in the present invention, described guide rod is with outside thread, and described driving mechanism is and the nut of guide rod screw-thread fit.Can order about sliding component and move by screwing in simply or screw out nut, thereby adjust the gap of gear rack.
Between described nut and sliding component, be provided with resilient snubber.So can be not directly by screwing in nut applied pressure, moment is delivered on sliding component, but slowly transmits by resilient snubber, both avoided high-intensity sliding component to cause any damage, also can guarantee that gear rack still can smooth running in the time of adjusting gap.
As preferably, described elasticity resilient snubber is the belleville spring being set on guide rod, and the two ends of belleville spring act on mutually with sliding component and nut respectively.The power that screws being applied on nut first changes the tension force of belleville spring into, and then is applied on sliding component, gentleer steady.Can regulate its tension force by the compress variation of controlling belleville spring, thereby meticulous adjusting gear is applied to the load on tooth bar.
As preferably, between described guide rod and belleville spring, be provided with lining.Lining is conducive to eliminate the wearing and tearing that belleville spring produces between belleville spring and guide rod by compression time, reduces the friction between guide rod and belleville spring, extension fixture working life.
For making apparatus structure more compact, to be convenient to install, one end of described lining is with the flanging offseting with sliding component, and the other end is slidably fitted with the stop collar matching with nut, and the two ends of belleville spring connect with flanging and stop collar respectively.Lining, stop collar are as a whole by connecting into of belleville spring, when installation, the lining with belleville spring and stop collar are directly enclosed within on guide rod.
Flanging and stop collar are also conducive to eliminate the wearing and tearing that belleville spring causes sliding component and nut by compression time, further extension fixture working life.
As preferably, on described guide rod, be also arranged with the pad between nut and stop collar, pad acts on mutually with lining and nut respectively.Pad is conducive to limit the screw-in degree of nut, prevents belleville spring distortion excessively.
The present invention also provides a kind of rack and pinion drive mechanism that contains described backlash eliminating equipment, the pedestal that comprises fitting seat and be rotatably assorted with fitting seat, actuating motor, speed reducer and the gear of interlock are successively housed on pedestal, on gear, be engaged with tooth bar, described fitting seat is provided with guide rod, on this guide rod, be slidably matched be useful on traction fitting seat make gear be adjacent to the sliding component of tooth bar, on described guide rod, be also provided with the driving mechanism for driving sliding component.
When need to adjust between gear rack gap time, need to be applied to the size of the pressure on sliding component according to lever principle calculating belleville spring, and this pressure is converted to the compress variation of belleville spring, thus nut is screwed in to the distance identical with amount of deformation to guide rod.
Compared with prior art, beneficial effect of the present invention is:
(1) the present invention is provided with the pedestal that can do with fitting seat relative movement, and gear is arranged on pedestal, move to eliminate gap between the two by ordering about gear to tooth bar, compared with mobile rack, the spent manpower and materials of carrier wheel are all less, should use more easy;
(2) on pedestal of the present invention, be fixed with sliding component, sliding component and pedestal are all take revolution bearing pin as fulcrum, and compared with pedestal, the moment of sliding component is larger, therefore only need apply less power to sliding component, just can order about base motion;
(3) the present invention is provided with belleville spring between nut and sliding component, the power that screws on nut of being applied to first changes the tension force of belleville spring into, and then be applied on sliding component, both avoided high-intensity sliding component to cause any damage, also can guarantee regulating when gap the gear rack still can smooth running;
(4) the present invention can regulate its tension force by the amount of deformation of controlling belleville spring, thereby meticulous adjusting gear is applied to the load on tooth bar;
(5) the present invention arranges lining between belleville spring and guide rod, and lining is conducive to eliminate the wearing and tearing that belleville spring produces between belleville spring and guide rod by compression time, reduces the friction between guide rod and belleville spring, extension fixture working life;
(6) lining of the present invention and stop collar are as a whole by connecting into of belleville spring, when installation, lining with belleville spring and stop collar is directly enclosed within on guide rod, the flanging of lining and stop collar are also conducive to eliminate the wearing and tearing that belleville spring causes sliding component and nut by compression time, further extension fixture working life;
(7) on guide rod of the present invention, be also arranged with the pad between nut and stop collar, pad acts on mutually with lining and nut respectively, is conducive to limit the screw-in degree of nut, prevents belleville spring distortion excessively.
Accompanying drawing explanation
Fig. 1 is the Facad structure schematic diagram of a kind of rack and pinion drive mechanism of the present invention;
Fig. 2 is the top surface structure schematic diagram of a kind of rack and pinion drive mechanism of the present invention;
Fig. 3 is the structural representation of a kind of rack and pinion drive mechanism backlash eliminating equipment of the present invention;
Fig. 4 is the enlarged view of A part in Fig. 3;
Fig. 5 is that specification (butterfly spring endoporus aperture) is 16 butterfly spring tension force and compress variation graph of a relation;
Wherein, 1: pedestal, 2: actuating motor, 3: speed reducer, 4: gear, 5: rack fixing seat, 6: tooth bar, 7: fitting seat, 8: fixed base, 9: revolution bearing pin, 10: guide rod, 11: sliding component, 12: pilot hole, 13: lining, 14: flanging, 15: stop collar, 16: belleville spring, 17: nut, 18: pad.
Embodiment
As shown in Figure 1 and Figure 2, a kind of rack and pinion drive mechanism of the present invention, comprises pedestal 1, and actuating motor 2, speed reducer 3 and the gear 4 of interlock is successively installed on pedestal 1, and gear 4 is meshed with the tooth bar 6 being arranged on rack fixing seat 5.
In rack and pinion drive mechanism of the present invention, be provided with backlash eliminating equipment, this backlash eliminating equipment comprises fitting seat 7, fitting seat 7 is arranged on fixed base 8 by bolt, and pedestal 1 is rotatably assorted with fitting seat 7 by revolution bearing pin 9, is convenient to fitting seat 7 wraparounds and ships and resell on another market axle 9 to pedestal 1 direction motion.
As shown in Figure 3, Figure 4, fitting seat 7 is provided with guide rod 10, is fixedly connected with tabular sliding component 11 on pedestal 1, sliding component 11 with the pilot hole 12 of guide rod 10 Spielpassung.In the time that sliding component 11 moves along guide rod 10, sliding component 11 is also drawing the fitting seat 7 wraparounds axle 9 of shipping and reselling on another market and is moving, and orders about gear 4 and is adjacent to tooth bar 6.Gap between guide rod 10 and pilot hole 12 has determined the displacement distance of sliding component 11 on guide rod 10.
A side at sliding component 11 away from fitting seat 7, on guide rod 10, be arranged with lining 13, one end of lining 13 is with the flanging 14 offseting with sliding component 11, and the other end is slidably fitted with stop collar 15, and between the flanging 14 of lining 13 and stop collar 15, butt has one group of belleville spring 16.Compression belleville spring 16 can make it to produce certain tension force, and this tension force can order about sliding component 11 and move.The inside tension force of belleville spring 16 and the relation of compress variation are as shown in Figure 5.
Between stop collar 15 and nut 17, on guide rod 10, be also arranged with pad 18.Pad 18, for limiting the screw-in degree of nut 17, prevents belleville spring 16 distortion excessively.Distance between pad 18 and lining 13 ends (away from one end of sliding component 11) is the deformation allowance of belleville spring 16.
When need to adjust between gear 4 and tooth bar 6 gap time, need to be applied to the size of the pressure on sliding component 11 according to lever principle calculating belleville spring 16, and this pressure is converted to the compress variation of belleville spring 16, thus nut 17 is screwed in to the distance identical with amount of deformation to guide rod 10.
Claims (9)
1. a rack and pinion drive mechanism backlash eliminating equipment, it is characterized in that, comprise fitting seat and be rotatably assorted with fitting seat and fill cogged pedestal, described fitting seat is provided with guide rod, on this guide rod, be slidably matched be useful on traction fitting seat make gear be adjacent to the sliding component of tooth bar, on described guide rod, be also provided with the driving mechanism for driving sliding component.
2. rack and pinion drive mechanism backlash eliminating equipment as claimed in claim 1, is characterized in that, described sliding component be fixedly connected with pedestal and with the pilot hole of guide rod Spielpassung.
3. rack and pinion drive mechanism backlash eliminating equipment as claimed in claim 1, is characterized in that, described guide rod is with outside thread, and described driving mechanism is and the nut of guide rod screw-thread fit.
4. rack and pinion drive mechanism backlash eliminating equipment as claimed in claim 3, is characterized in that, between described nut and sliding component, is provided with resilient snubber.
5. rack and pinion drive mechanism backlash eliminating equipment as claimed in claim 4, is characterized in that, described resilient snubber is the belleville spring being set on guide rod, and the two ends of belleville spring act on mutually with sliding component and nut respectively.
6. rack and pinion drive mechanism backlash eliminating equipment as claimed in claim 5, is characterized in that, between described guide rod and belleville spring, is provided with lining.
7. rack and pinion drive mechanism backlash eliminating equipment as claimed in claim 6, it is characterized in that, one end of described lining is with the flanging offseting with sliding component, and the other end is slidably fitted with the stop collar matching with nut, and the two ends of belleville spring connect with flanging and stop collar respectively.
8. rack and pinion drive mechanism backlash eliminating equipment as claimed in claim 7, is characterized in that, is also arranged with the pad between nut and stop collar on described guide rod, and pad acts on mutually with lining and nut respectively.
9. a rack and pinion drive mechanism, it is characterized in that, the pedestal that comprises fitting seat and be rotatably assorted with fitting seat, actuating motor, speed reducer and the gear of interlock are successively housed on pedestal, on gear, be engaged with tooth bar, described fitting seat is provided with guide rod, on this guide rod, be slidably matched be useful on traction fitting seat make gear be adjacent to the sliding component of tooth bar, on described guide rod, be also provided with the driving mechanism for driving sliding component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410116110.4A CN103883708A (en) | 2014-03-26 | 2014-03-26 | Gear rack transmission mechanism and gap elimination device for gear rack transmission mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410116110.4A CN103883708A (en) | 2014-03-26 | 2014-03-26 | Gear rack transmission mechanism and gap elimination device for gear rack transmission mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103883708A true CN103883708A (en) | 2014-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410116110.4A Pending CN103883708A (en) | 2014-03-26 | 2014-03-26 | Gear rack transmission mechanism and gap elimination device for gear rack transmission mechanism |
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| CN (1) | CN103883708A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107956863A (en) * | 2016-10-14 | 2018-04-24 | 昆山金吉品机器有限公司 | The adjusting device for backlash of dual output transmission mechanism |
| CN109780191A (en) * | 2019-03-18 | 2019-05-21 | 北京电影学院 | A kind of gear pair driving mechanism and the photography mechanical arm containing it |
| CN110745442A (en) * | 2019-11-07 | 2020-02-04 | 上海速锐信息技术有限公司 | Synchronous vertical lifting system for stereoscopic warehouse |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3200502A (en) * | 1963-05-30 | 1965-08-17 | Meyer Hans | Comparator |
| GB1182719A (en) * | 1968-01-12 | 1970-03-04 | Burman & Sons Ltd | Rack and Pinion Steering Mechanism |
| US3505895A (en) * | 1967-03-15 | 1970-04-14 | Citroen Sa Andre | Rack-and-pinion steering systems |
| FR2525785A1 (en) * | 1982-04-21 | 1983-10-28 | Snecma | Split rack assembly for play-free pinion drive - uses spring-loaded sliding rack housed in main rack to maintain teeth in contact with pinion |
| EP0102511A1 (en) * | 1982-09-08 | 1984-03-14 | International Business Machines Corporation | Linear actuator of the rack and pinion type and method of minimizing friction and wear therein |
| DE8908735U1 (en) * | 1988-07-28 | 1989-08-31 | Oerlikon-Contraves AG, Zürich | Gear for moving an object in two mutually perpendicular directions |
| JP2004332745A (en) * | 2003-04-30 | 2004-11-25 | Sanyo Electric Co Ltd | Backlash preventive means for rack gear, and disk player having the means |
| CN101487526A (en) * | 2008-01-14 | 2009-07-22 | 崴立机电股份有限公司 | Backlash elimination structure of transmission mechanism |
| WO2010052412A1 (en) * | 2008-11-06 | 2010-05-14 | Jtekt Europe | Off-centred pusher device for steering an automobile |
| JP2010210062A (en) * | 2009-03-12 | 2010-09-24 | Jtekt Corp | Rack shaft supporting device and vehicular steering device |
-
2014
- 2014-03-26 CN CN201410116110.4A patent/CN103883708A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3200502A (en) * | 1963-05-30 | 1965-08-17 | Meyer Hans | Comparator |
| US3505895A (en) * | 1967-03-15 | 1970-04-14 | Citroen Sa Andre | Rack-and-pinion steering systems |
| GB1182719A (en) * | 1968-01-12 | 1970-03-04 | Burman & Sons Ltd | Rack and Pinion Steering Mechanism |
| FR2525785A1 (en) * | 1982-04-21 | 1983-10-28 | Snecma | Split rack assembly for play-free pinion drive - uses spring-loaded sliding rack housed in main rack to maintain teeth in contact with pinion |
| EP0102511A1 (en) * | 1982-09-08 | 1984-03-14 | International Business Machines Corporation | Linear actuator of the rack and pinion type and method of minimizing friction and wear therein |
| DE8908735U1 (en) * | 1988-07-28 | 1989-08-31 | Oerlikon-Contraves AG, Zürich | Gear for moving an object in two mutually perpendicular directions |
| JP2004332745A (en) * | 2003-04-30 | 2004-11-25 | Sanyo Electric Co Ltd | Backlash preventive means for rack gear, and disk player having the means |
| CN101487526A (en) * | 2008-01-14 | 2009-07-22 | 崴立机电股份有限公司 | Backlash elimination structure of transmission mechanism |
| WO2010052412A1 (en) * | 2008-11-06 | 2010-05-14 | Jtekt Europe | Off-centred pusher device for steering an automobile |
| JP2010210062A (en) * | 2009-03-12 | 2010-09-24 | Jtekt Corp | Rack shaft supporting device and vehicular steering device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107956863A (en) * | 2016-10-14 | 2018-04-24 | 昆山金吉品机器有限公司 | The adjusting device for backlash of dual output transmission mechanism |
| CN107956863B (en) * | 2016-10-14 | 2023-06-30 | 昆山金吉品机器有限公司 | Backlash adjusting device of double-output transmission mechanism |
| CN109780191A (en) * | 2019-03-18 | 2019-05-21 | 北京电影学院 | A kind of gear pair driving mechanism and the photography mechanical arm containing it |
| CN110745442A (en) * | 2019-11-07 | 2020-02-04 | 上海速锐信息技术有限公司 | Synchronous vertical lifting system for stereoscopic warehouse |
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Application publication date: 20140625 |
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