CN201190780Y - Gap-eliminating mechanism gear rack drive - Google Patents
Gap-eliminating mechanism gear rack drive Download PDFInfo
- Publication number
- CN201190780Y CN201190780Y CNU2008200342884U CN200820034288U CN201190780Y CN 201190780 Y CN201190780 Y CN 201190780Y CN U2008200342884 U CNU2008200342884 U CN U2008200342884U CN 200820034288 U CN200820034288 U CN 200820034288U CN 201190780 Y CN201190780 Y CN 201190780Y
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- gear
- helical gear
- shaft
- spring
- helical
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- Expired - Fee Related
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Abstract
The utility model provides a gap eliminator for gears and racks, wherein a motor inputs motion into a first gear shaft via a helical gear couple provided with a gap elimination correction gasket, the axle end of the first gear shaft is provided with an end face bearing, a bearing support sleeve, a disc spring, a spring support shaft, an adjusting cover adjusting the spring and a correction gasket, the first gear shaft is further provided with an another helical gear couple having same tooth number, modulus and pressure angle for transferring motion to another two gear shafts, the two gear shafts respectively drive a helical gear of same tooth number, modulus and pressure angle and a gear couple meshed with the rack and provided with same geometry parameters. The gap eliminator has simple structure, adjustment and use, and can effectively eliminate the gear clearance at the positive and negative motions of the rack.
Description
Technical field
The utility model belongs to the mechanical transmission field, is specifically related to a kind of gear rack anti-backlash mechanism, is the special-purpose regulating mechanism that has the transmission of kinematic accuracy and load request to design for some long distances.This mechanism can adjust automatically to the gap that the gear rack wearing and tearing are produced in the course of the work, thereby guarantees the accuracy of gear rack transmitting movement.
Background material
In the transmission of mechanical transmission middle gear tooth bar is a kind of comparatively common transmission of movement mode.But this transmission is gapped, and this is unallowed to the kinematic accuracy working machine tool that has certain requirements.And the higher common mechanism ball guide screw nat of transmission accuracy is subjected to the restriction of stroke, is unsuitable for the transmission of long distance.In order to adapt to the requirement of long range accuracy transmission, need be to the gear rack kinematic pair crack that disappears, eliminate in existing gap to the gear rack kinematic pair several different methods, but these mechanisms are all complicated generally speaking, and cost is higher.How to design a kind of simple in structure, with low cost and to have the length of good kinematic accuracy and load performance be the starting point that we carry out this work apart from the gear rack kinematic pair of kinematic pair mechanism----band anti-backlash mechanism.
The model utility content
Clearance eliminating mechanism when technical problem to be solved in the utility model provides a kind of gear rack transmission, this mechanism structure is simple, cost is lower and can eliminate automatically because the gap that the gear rack wearing and tearing produce, thereby guarantees the precision of transmitting movement.
Clearance eliminating mechanism during gear rack transmission described in the utility model comprises:
First helical gear that links to each other with motor output shaft;
Mesh simultaneously with first helical gear, and be installed in second helical gear and the 3rd helical gear on first gear shaft side by side, two helical gear gear parameters are identical, are provided with the correction pad of adjustable thickness between the two;
One side shaft end of first gear shaft is equipped with the axial displacement anti-backlash mechanism, and a pair of number of teeth, modulus, pressure angle are housed on the opposite side side by side equate, and opposite the 4th helical gear and the 5th helical gear of rotation direction;
The 4th helical gear and the 5th helical gear respectively with the 6th helical gear that is installed in second gear shaft and the 7th helical gear engagement that is installed in the 3rd gear shaft, the 6th helical gear and the 7th helical gear number of teeth, modulus, pressure angle equate, and rotation direction is opposite;
First spur gear and second spur gear that are meshed with tooth bar simultaneously also are housed respectively on the output terminal of second gear shaft and the 3rd gear shaft.
Above-mentioned axial displacement anti-backlash mechanism comprises end face bearing, bearing supporting sleeve, belleville spring, spring-loaded axle, adjusts the end cap of spring and revises pad, the end face Bearing Installation is at axle head, the end face bearing inner race is bearing in an end of bearing supporting sleeve, the coaxial mounting spring supporting axle of the bearing supporting sleeve the other end, belleville spring is enclosed within on the spring-loaded axle, the one end is against bearing supporting sleeve side, and the other end is compressed by end cap, revises pad and is installed in the end cap inboard.
During the utility model work, motor will move through first helical gear that meshes with a pair of helical gear and be input on first gear shaft, and this revises pad to the crack that disappears is housed between the helical gear.Axle head at first gear shaft is provided with by end face bearing, bearing supporting sleeve, belleville spring, spring-loaded axle, adjusts the end cap of spring and revise the axial displacement anti-backlash mechanism that pad is formed.In addition, the other a pair of number of teeth, modulus, the pressure angle that also comprise transmitting movement on first gear shaft are equal fully, the helical gear that rotation direction is opposite, it is equal fully that this drives two numbers of teeth, modulus, pressure angle respectively to gear, the helical gear that rotation direction is opposite, with transmission of power on second gear shaft and the 3rd gear shaft.Afterwards, second gear shaft and the 3rd gear shaft mesh by the identical straight-tooth wheel and rack of a pair of geometric parameter that is installed in output terminal respectively more simultaneously.This cover mechanism structure is simple, adjusts easy to usely, can effectively eliminate the backlash when tooth bar is positive and negative to move.
The axial force that the utility model utilizes the belleville spring compression to produce makes first gear shaft drive helical gear and produces axial displacement, thereby eliminates the gap of helical gear flank engagement.And that the opposite helical gear rotation of two rotation directions that is installed in first gear shaft drives geometric parameter simultaneously is identical, and with the counter-rotation of tooth bar meshed gears, and then the backlash when having eliminated the positive and negative motion of tooth bar.
The utility model has overcome the original interstice and has eliminated complexity of mechanism, and the cost of production problem of higher.Adopt anti-backlash mechanism of the present utility model simple in structure, adjust easy to usely, can effectively eliminate the tooth bar backlash in positive and negative when motion.
Description of drawings
Fig. 1 structural representation of the present utility model,
Fig. 2 is the A-A sectional view of Fig. 1.
Embodiment
The utility model is described in further detail below in conjunction with attached soil figure.
As shown in Figures 1 and 2, the clearance eliminating mechanism during a kind of gear rack transmission, it comprises that mainly the gear rack of the crack transmission that disappears, the belleville spring that is used to eliminate the gap adjust structure and adjust pad.Motor 1 will move through first helical gear 2 and pass to second helical gear 3 and the 3rd helical gear 5 simultaneously, second helical gear 3 is identical with the gear parameter of the 3rd helical gear 5, revise pad 4 by adjusting, make the axial displacement that produces trace between these two gears and first helical gear 2, thereby the back lash between them is eliminated.Motion is input on first gear shaft 6, is provided with the end cap 12 and the correction pad 11 of end face bearing 7, bearing supporting sleeve 8, belleville spring 10, spring-loaded axle 9, adjustment spring at the axle head of first gear shaft 6.End face bearing 7 is revised pad 11 generation microdisplacements by adjusting, under the effect of belleville spring 10, be pressed in the axle head of first gear shaft 6, the displacement that makes first gear shaft 6 produce trace, at this moment the other a pair of number of teeth on first gear shaft 6, modulus, pressure angle equates, the 4th helical gear 13 that rotation direction is opposite and the 5th helical gear 14 also produce the displacement of trace, thereby a pair of number of teeth that will mesh simultaneously with the 4th helical gear 13 and the 5th helical gear 14, modulus, pressure angle equates, the 6th helical gear 16 that rotation direction is opposite and the back lash between the 7th helical gear 17 eliminate, will drive a pair of geometric parameter equates fully on second gear shaft 15 and the 3rd gear shaft 18 first spur gear 19 and 20 rotations of second spur gear so simultaneously, this meshes with tooth bar simultaneously to gear, eliminates up to the gap with the positive and negative both direction between gear and the tooth bar.When equipment is installed initial debugging, first spur gear, 19 1 sides are adjusted to tooth bar 21 contact, second spur gear 20 then is that an opposite side contacts with tooth bar 21 simultaneously, afterwards with the 7th helical gear 17 on the gear shaft 18 by the tensioner cover locking on gear shaft 18, with the 6th helical gear 16 on the gear shaft 15 by the tensioner cover locking on wheel shaft 15, locate between each rotating component like this.Can guarantee that so at work motor positive and inverse all has a spur gear directly to contact with tooth bar, thereby eliminate the backlash of gear rack transmission.The utility model adjust to revise pad 4 by being provided with, based on the axial displacement anti-backlash mechanism of belleville spring 10 and the project organization of two spur gears, to tooth bar, the rack drives worktable can be realized the motion of degree of precision with the gapless transmission of movement of the moving handle of motor.If wearing and tearing are arranged, can guarantee no gap engagement between the first spur gear gear 19 and the second spur gear gear 20 and the tooth bar 21 after gear rack motion a period of time, thereby realize that no gap therebetween moves by further adjustment correction pad 11.
Claims (2)
1, the clearance eliminating mechanism during a kind of gear rack transmission is characterized in that it comprises:
First helical gear (2) that links to each other with motor (1) output shaft;
Mesh simultaneously with first helical gear (2), and be installed in second helical gear (3) and the 3rd helical gear (5) on first gear shaft (6) side by side, two helical gear gear parameters are identical, are provided with the correction pad (4) of adjustable thickness between the two;
One side shaft end of first gear shaft (6) is equipped with the axial displacement anti-backlash mechanism, and a pair of number of teeth, modulus, pressure angle are housed on the opposite side side by side equate, and opposite the 4th helical gear (13) and the 5th helical gear (14) of rotation direction;
The 4th helical gear (13) and the 5th helical gear (14) respectively with the 6th helical gear (16) that is installed in second gear shaft (15) and the 7th helical gear (17) engagement that is installed in the 3rd gear shaft (18), the number of teeth of the 6th helical gear (16) and the 7th helical gear (17), modulus, pressure angle equate, and rotation direction is opposite;
First spur gear (19) and second spur gear (20) that are meshed with tooth bar (21) simultaneously also are housed respectively on the output terminal of second gear shaft (15) and the 3rd gear shaft (18).
2, clearance eliminating mechanism during gear rack transmission according to claim 1, it is characterized in that described axial displacement anti-backlash mechanism comprises end face bearing (7), bearing supporting sleeve (8), belleville spring (10), spring-loaded axle (9), adjust the end cap (12) of spring and revise pad (11), end face bearing (7) is installed in axle head, end face bearing (7) inner ring is bearing in an end of bearing supporting sleeve (8), the coaxial mounting spring supporting axle of bearing supporting sleeve (8) the other end (9), belleville spring (10) is enclosed within on the spring-loaded axle (9), the one end is against bearing supporting sleeve (8) side, the other end is compressed by end cap (12), revises pad (11) and is installed in end cap (12) inboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200342884U CN201190780Y (en) | 2008-04-22 | 2008-04-22 | Gap-eliminating mechanism gear rack drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200342884U CN201190780Y (en) | 2008-04-22 | 2008-04-22 | Gap-eliminating mechanism gear rack drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201190780Y true CN201190780Y (en) | 2009-02-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200342884U Expired - Fee Related CN201190780Y (en) | 2008-04-22 | 2008-04-22 | Gap-eliminating mechanism gear rack drive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201190780Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100545487C (en) * | 2008-04-22 | 2009-09-30 | 南京数控机床有限公司 | Clearance eliminating mechanism during a kind of mechanical transmission |
| CN103128747A (en) * | 2011-11-30 | 2013-06-05 | 鸿富锦精密工业（深圳）有限公司 | Robot arm part and gear clearance adjusting mechanism used by same |
| CN106694312A (en) * | 2017-02-28 | 2017-05-24 | 贾建胜 | Sealing ring lubricating device for household water purifier production |
| CN108488370A (en) * | 2018-06-26 | 2018-09-04 | 江苏国茂减速机股份有限公司 | It is a kind of can dynamic control gear backlash device |
| CN108679183A (en) * | 2018-08-09 | 2018-10-19 | 山东省青东智能科技有限公司 | Rack-and-pinion walking mechanism gearbox |
-
2008
- 2008-04-22 CN CNU2008200342884U patent/CN201190780Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100545487C (en) * | 2008-04-22 | 2009-09-30 | 南京数控机床有限公司 | Clearance eliminating mechanism during a kind of mechanical transmission |
| CN103128747A (en) * | 2011-11-30 | 2013-06-05 | 鸿富锦精密工业（深圳）有限公司 | Robot arm part and gear clearance adjusting mechanism used by same |
| CN103128747B (en) * | 2011-11-30 | 2015-12-16 | 鸿富锦精密工业（深圳）有限公司 | The gear clearance guiding mechanism of robot arm and use thereof |
| CN106694312A (en) * | 2017-02-28 | 2017-05-24 | 贾建胜 | Sealing ring lubricating device for household water purifier production |
| CN108488370A (en) * | 2018-06-26 | 2018-09-04 | 江苏国茂减速机股份有限公司 | It is a kind of can dynamic control gear backlash device |
| CN108679183A (en) * | 2018-08-09 | 2018-10-19 | 山东省青东智能科技有限公司 | Rack-and-pinion walking mechanism gearbox |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090204 |