CN202371114U - Transmission gap regulation mechanism for double-gear output speed reducer - Google Patents
Transmission gap regulation mechanism for double-gear output speed reducer Download PDFInfo
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- CN202371114U CN202371114U CN2011205476410U CN201120547641U CN202371114U CN 202371114 U CN202371114 U CN 202371114U CN 2011205476410 U CN2011205476410 U CN 2011205476410U CN 201120547641 U CN201120547641 U CN 201120547641U CN 202371114 U CN202371114 U CN 202371114U
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- speed reducer
- output speed
- regulating mechanism
- bearing
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Abstract
The utility model discloses a transmission gap regulation mechanism for a double-gear output speed reducer. The transmission gap regulation mechanism comprises an input shaft provided with an input gear, a drive gear configured on the input shaft, a pair of intermediate gears meshed with the drive gear, output gears meshed with the intermediate gears, and a rack meshed with the output gears, the modules and numbers of teeth of the intermediate gears are the same, the rotating directions of the intermediate gears are opposite, and the intermediate gears are oblique gears configured on the two sides of the input shaft; correspondingly, one output gear is tightly pressed on the left toothed surface of the rack and the other one of the output gears is tightly pressed on the right toothed surface of the rack. According to the transmission gap regulation mechanism for the double-gear output speed reducer, the transmission gap can be eliminated.
Description
Technical field
The utility model relates to a kind of drive gap regulating mechanism of speed reducer, is mainly used in the transmission accuracy adjustment of power unit in the lathe transmission.
Background technique
In the numerical control machine tool, power unit adopts ball screw or pinion and rack transmission more, because ball screw constitutes support beam structure more, support stiffness is poor, if stroke is longer, is easy to generate deflection deformation.Therefore, although the transmission accuracy of ball screw is taken all factors into consideration support stiffness greater than pinion and rack, on large-scale, heavy type numerical control lathe, then generally adopt pinion and rack to carry out transmission, especially stroke surpasses the situation of 6m.
Pinion and rack is than ball screw, and its transmission accuracy is poor slightly, but on bearing capacity, than ball screw very big advantage is arranged.Therefore, if the transmission accuracy problem is able to solve, the application prospect of gear rack can be better.
The rack and pinion drive mechanism that is applied at present on the lathe is the rack and pinion drive mechanism of individual gears, because of export structure is simple, uses more extensive.The transmission accuracy of this type of driving mechanism is in the adjustment in teeth directional gap.Known adjusting method is to adopt roll flute, forms so-called no gap transmission, to reduce the backlass of Transmitted chains.But difficulty of processing is big, and because the gap is too small, influences effective formation of lubricant film, and the transmission environment is more abominable, and working life is short, and the speed reducer of the pinion and rack output of comprehensive individual gears effect aspect the backlass of eliminating transmission is not ideal.
Summary of the invention
Therefore, the purpose of the utility model is, takes the advantage of the simple in structure and suitable long stroke transmission of pinion and rack, proposes a kind of bidentate wheel output speed reducer drive gap regulating mechanism that can eliminate drive gap.
The technological scheme that the utility model adopts is:
A kind of bidentate wheel of the utility model output speed reducer drive gap regulating mechanism; Comprise one have the input shaft of importing gear, be configured in actuation gear on this input shaft, with the intermediate gear of this actuation gear engagement and with the output gear of this intermediate gear engagement; And with the tooth bar of this output gear engagement; Said intermediate gear has a pair of, for modulus and the number of teeth equate but rotation direction is opposite, and is configured in the helical gear of the both sides of said input shaft; Accordingly, an output gear is pressed on the left flank of tooth of tooth bar, and another output gear is pressed on the right flank of tooth of tooth bar.
According to the bidentate wheel output speed reducer drive gap regulating mechanism of said structure, adopt the structure of diclinic gear output, corresponding to input shaft, for satisfying engagement, need be configured to said actuation gear is an opposite gear of a pair of rotation direction or a herringbone gear.
Above-mentioned bidentate wheel output speed reducer drive gap regulating mechanism, said output gear is a helical gear, correspondingly; Said tooth bar is a helical rack, so, and when the adjusting play; Make input shaft axially produce displacement, the driving that makes actuation gear produce two different direction can be known according to helical gear principle; Can eliminate the drive gap of self in view of the above, and then be transferred to output gear, make two output gears to different direction rotations; Thereby left output wheel is pressed on left on the tooth bar flank of tooth, and right output wheel is pressed on to the right on the tooth bar flank of tooth, reaches the purpose of eliminating backlass.
Further be described as, under the working state, because the relation of rotational characteristic; Two output gears must have an idle running, a driving, but this does not influence the realization of driving and the adjustment of backlass; Be that mainly two output gears all are pressed on the tooth bar flank of tooth, can realize instant switching-over.
Above-mentioned bidentate wheel output speed reducer drive gap regulating mechanism, said actuation gear is the opposite gear of a pair of rotation direction.
Above-mentioned bidentate wheel output speed reducer drive gap regulating mechanism when said actuation gear is a pair of, splits at said input gear in axial both sides.
Above-mentioned bidentate wheel output speed reducer drive gap regulating mechanism, the bearing pack that is disposed at said input shaft contains a thrust-bearing.
Above-mentioned bidentate wheel output speed reducer drive gap regulating mechanism, said thrust-bearing is that an axial adjustable end cap is given axially locating.
Above-mentioned bidentate wheel output speed reducer drive gap regulating mechanism is provided with one group of dish spring that engages with said thrust-bearing in the said axially adjustable end cap.
Above-mentioned bidentate wheel output speed reducer drive gap regulating mechanism, said axially adjustable end cap is an outside thread nut, is threaded in the thrust-bearing corresponding end seat hole.
Above-mentioned bidentate wheel output speed reducer drive gap regulating mechanism, said bearing pack also comprises the roller bearing of an assembly to using.
Description of drawings
Fig. 1 is a kind of input shaft axial displacement adjustment structure that is applied to the utility model.
Fig. 2 is drive gap adjustment schematic diagram.
Among the figure: 1, nut, 2, the dish spring, 3, little axle, 4, thrust-bearing; 5, round nut, 6, roller bearing, 7, left-handed gear, 8, main drive gear; 9, dextrorotation gear, 10, roller bearing, 11, the adjustment axle, 12, left output gear; 13, right output gear, 14, helical rack, 15, intermediate gear.
Embodiment
Attach Fig. 1 and 2 with reference to explanation, adopt pinion and rack to be used for transmission, the adjustment axle 11 among the figure is a driving link; Constitute input shaft, input shaft is provided with three gears, is respectively main drive gear 8; Be used for the input of power; Constitute the input gear, two is the opposite helical gear of rotation direction in addition, is respectively left-handed gear 7 and dextrorotation gear 9 among the figure.In addition, as shown in Figure 1, also be furnished with input shaft, just the axial adjusting device of the adjustment axle 11 among the figure, i.e. nut 1 among the figure.According to said structure the technological scheme of the utility model is done more detailed explanation, make the utility model of understanding that it will be apparent to those skilled in that.
So; According to the basic structure of the bidentate of the utility model wheel output speed reducer drive gap regulating mechanism be contain one have an input gear (main drive gear 8 among the figure) input shaft (adjustment axle 11 among the figure), be configured in actuation gear (left-handed gear 7 and dextrorotation gear 9 among the figure) on this input shaft, (more clearly provide indication among Fig. 2 with the intermediate gear 15 of this actuation gear engagement; Corresponding to Fig. 1; Fig. 2 jin is used for the indication of principle) and with the output gear (left output gear 12 and the right output gear 13 of Fig. 2) of this intermediate gear engagement; And with the tooth bar (corresponding to the helical rack among Fig. 2 14) of this output gear engagement; Clearly demonstrating said intermediate gear among the figure has a pair of; For modulus and the number of teeth equate but rotation direction is opposite and be configured in the helical gear of the both sides of said input shaft, driving parameters is consistent, and difference is that driving direction is opposite; In order satisfy to eliminate the basic necessary condition in gap, the condition that need satisfy so is, an output gear is pressed on the left flank of tooth of tooth bar, and another output gear is pressed on the right flank of tooth of tooth bar.
So according to said structure because two output gears compress the characteristic of mode, cause in working order down, it is in running order only to have an output gear, another then is because of not loading and can only not dallying.Shown in accompanying drawing 2, adopted arrow to represent that work turns among the figure, but it should be noted that not to be under the same working condition, the switched in opposite of two output gears, but identical, the arrow indication has represented that two output gears divide other work to turn among the figure.So as shown in Figure 2, if it is left output gear 12 is in running order, inevitable; Drive helical rack 14 to left movement, because right output gear 13 is pressed on the helical rack 14 left flank of tooth, because the back lash; Must not be pressed on the right flank of tooth of tooth bar; Thereby the motion that causes right output gear 13 to be done is accompany movement, the said idle running of preamble just.When reverse, right output gear can be realized driving at once, than single gear, at first to rotate corresponding gap after, can realize that the working state that drives compares, this programme can be realized turning at once, exactly can eliminate backlass.
About said output gear, can select helical gear as shown in Figure 2, when also selecting spur gear, difference just is that helical gear driving is more steady, bearing capacity is stronger.Correspondingly, when selecting helical gear for use, said tooth bar is a helical rack 14, the coupling engagement.
Based on multifarious selection, the preferable selection of said actuation gear is to select the opposite gear of a pair of rotation direction, left-handed gear 7 and dextrorotation gear 9 shown in accompanying drawing 1.Single gear can also be selected,, the opposite gear of rotation direction can be driven simultaneously like herringbone gear.Adopt structure as shown in Figure 1 can satisfy preferably and drive, and load is more even, also adjustment more easily.
Further, when said actuation gear is a pair of, split at said input gear in axial both sides, be shown in Figure of description 1, the load designing and calculating is relatively all fairly simple.
Preferably, the bearing pack that is disposed at said input shaft contains a thrust-bearing, mainly is the difference of aforementioned driving mode; The load of left-handed gear 7 and dextrorotation gear 8 is unbalanced, will inevitably produce the thrust load of input shaft, therefore; Preferably be configured to thrust-bearing; Certainly, also can dispose a pair of angular contact bearing, perhaps combination bearing.
So, in order to satisfy above-mentioned condition about two output gear wheel and rack engagements, preferable selection is that said thrust-bearing is that an axial adjustable end cap is given axially locating, and the trace axial through input shaft changes, and can realize above-mentioned specific driving structure.
More preferably, shown in accompanying drawing 1, be provided with one group of dish spring that engages with said thrust-bearing in the said axially adjustable end cap, prevent overload.
Said axially adjustable end cap is an outside thread nut, is threaded in the thrust-bearing corresponding end seat hole, and adjustment is got up more convenient.
Selection front about bearing is mentioned; When selecting to contain a thrust-bearing, better selection then is that said bearing pack also comprises the roller bearing of an assembly to using; The occasion that is applicable to low-speed heave-load of roller bearing satisfies the application of this programme.
Claims (9)
1. a bidentate is taken turns output speed reducer drive gap regulating mechanism; Comprise one have the input shaft of importing gear, be configured in actuation gear on this input shaft, with the intermediate gear of this actuation gear engagement and with the output gear of this intermediate gear engagement; And with the tooth bar of this output gear engagement, it is characterized in that said intermediate gear has a pair of; For modulus and the number of teeth equate but rotation direction is opposite, and be configured in the helical gear of the both sides of said input shaft; Accordingly, an output gear is pressed on the left flank of tooth of tooth bar, and another output gear is pressed on the right flank of tooth of tooth bar.
2. bidentate wheel output speed reducer drive gap regulating mechanism according to claim 1 is characterized in that said output gear is a helical gear, and correspondingly, said tooth bar is a helical rack.
3. bidentate wheel output speed reducer drive gap regulating mechanism according to claim 2 is characterized in that said actuation gear is the opposite gear of a pair of rotation direction.
4. bidentate wheel output speed reducer drive gap regulating mechanism according to claim 3 is characterized in that, when said actuation gear is a pair of, splits at said input gear in axial both sides.
5. according to claim 2 or 3 described bidentate wheel output speed reducer drive gap regulating mechanisms, it is characterized in that the bearing pack that is disposed at said input shaft contains a thrust-bearing.
6. bidentate wheel output speed reducer drive gap regulating mechanism according to claim 5 is characterized in that said thrust-bearing is that an axial adjustable end cap is given axially locating.
7. bidentate wheel output speed reducer drive gap regulating mechanism according to claim 6 is characterized in that, is provided with one group of dish spring that engages with said thrust-bearing in the said axially adjustable end cap.
8. bidentate wheel output speed reducer drive gap regulating mechanism according to claim 7 is characterized in that said axially adjustable end cap is an outside thread nut, is threaded in the thrust-bearing corresponding end seat hole.
9. bidentate wheel output speed reducer drive gap regulating mechanism according to claim 5 is characterized in that said bearing pack also comprises the roller bearing of an assembly to using.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205476410U CN202371114U (en) | 2011-12-24 | 2011-12-24 | Transmission gap regulation mechanism for double-gear output speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205476410U CN202371114U (en) | 2011-12-24 | 2011-12-24 | Transmission gap regulation mechanism for double-gear output speed reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202371114U true CN202371114U (en) | 2012-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205476410U Expired - Fee Related CN202371114U (en) | 2011-12-24 | 2011-12-24 | Transmission gap regulation mechanism for double-gear output speed reducer |
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| CN (1) | CN202371114U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277493A (en) * | 2013-06-21 | 2013-09-04 | 苏州新区枫桥净化设备厂 | Gear transmission device |
| CN110608279A (en) * | 2019-10-08 | 2019-12-24 | 常州天山重工机械有限公司 | Gear driver |
| CN111609121A (en) * | 2020-04-02 | 2020-09-01 | 浙江万达汽车方向机股份有限公司 | Gear rack steering gear backlash eliminating device and damping and limiting method thereof |
-
2011
- 2011-12-24 CN CN2011205476410U patent/CN202371114U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277493A (en) * | 2013-06-21 | 2013-09-04 | 苏州新区枫桥净化设备厂 | Gear transmission device |
| CN110608279A (en) * | 2019-10-08 | 2019-12-24 | 常州天山重工机械有限公司 | Gear driver |
| CN111609121A (en) * | 2020-04-02 | 2020-09-01 | 浙江万达汽车方向机股份有限公司 | Gear rack steering gear backlash eliminating device and damping and limiting method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120808 Termination date: 20141224 |
|
| EXPY | Termination of patent right or utility model |