CN102777556A - Gear-rack precise transmission structure for heavy machinery - Google Patents
Gear-rack precise transmission structure for heavy machinery Download PDFInfo
- Publication number
- CN102777556A CN102777556A CN2012102803104A CN201210280310A CN102777556A CN 102777556 A CN102777556 A CN 102777556A CN 2012102803104 A CN2012102803104 A CN 2012102803104A CN 201210280310 A CN201210280310 A CN 201210280310A CN 102777556 A CN102777556 A CN 102777556A
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- China
- Prior art keywords
- gear
- tooth bar
- teeth
- drive structure
- precision drive
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Abstract
The invention relates to a transmission structure, in particular to a gear-rack precise transmission structure for heavy machinery. Rack teeth grooves (4) are ranked in the direction of a rotating shaft of a gear (1), gear teeth (3) are spirally ranked along the periphery of the gear (1), spirally ranked screw pitches are multiple that of teeth pitches of a rack (2), the gear (1) is driven to rotate and moves in the direction of the rotating shaft through matching of the gear teeth (3) and the rack teeth grooves (4). By aid of the gear-rack precise transmission structure, precise control on forward stroke and backward stroke of the gear can be achieved. The length of the driven gear is short in the direction of the rotating shaft so that gravity drooping can be avoided. The gear-rack precise transmission structure simultaneously keeps the advantages of the simple structure and convenience in assembling.
Description
Technical field
The application relates to drive mechanism, is specially the gear-tooth bar precision drive structure that is used for heavy machinery.
Background technique
Existing gear-tooth bar drive mechanism can convert rotatablely moving of gear to the motion that moves forward and backward of tooth bar.The benefit of gear-tooth bar drive mechanism is, realize the driving to gear, only need with live axle be connected on the gear face a bit, the driving through live axle makes gear get final product around the live axle rotation, only need a tie point, simple in structure, easy to assembly.In this drive mechanism, the tooth bar teeth groove is arranged along the tangential of gear teeth, is difficult to rack stroke is carried out precision control.
The screw-and-nut drive mechanism can convert rotatablely moving of screw rod to the motion that moves forward and backward of nut.Because screw rod has certain length, in heavy machinery, the phenomenon of gravity sag can appear in the screw rod stage casing.
Summary of the invention
The application's purpose is to convert the motion of advancing or retreating to rotatablely moving, and can carry out precision control to forward path and backward travel, and in heavy machinery, use the phenomenon that can not produce gravity sag.
Provide the gear-tooth bar precision drive structure that is used for heavy machinery for this reason, comprise gear and tooth bar, the outer circumferential side of gear is provided with the gear teeth; The gear teeth are fitted in the tooth bar teeth groove along extending radially out of gear, it is characterized in that, the tooth bar teeth groove is arranged along the rotary gear shaft direction; The gear teeth are along the outer circumferential side helical arrangement of gear, and the pitch of helical arrangement is the multiple of rack tooth distance, and gear is driven in rotation; Through cooperatively interacting of gear teeth and tooth bar teeth groove, gear moves along rotor shaft direction.
Utilize this gear-tooth bar precision drive structure; Ordering about gear whenever rotates a circle; Gear is that the rotary gear shaft direction is advanced or retreated one times or many times distance of rack tooth distance along the orientation of tooth bar teeth groove just, therefore can realize the precision of gear forward path and backward travel is controlled.Because driven gear length on rotor shaft direction is very short, so can not produce the phenomenon of gravity sag.This gear-tooth bar precision drive structure has kept advantage simple in structure, easy to assembly simultaneously.
Description of drawings
Fig. 1 is the stereogram of gear-tooth bar precision drive structure.
Fig. 2 is the gear partial enlarged drawing.
Fig. 3 is the plan view of gear-tooth bar precision drive structure.
Fig. 4 is before gear is driven in rotation and the cooperation position side view of tooth bar.
Fig. 5 is that gear is driven in rotation the position side view that 1/4th weeks cooperated with tooth bar the time.
Fig. 6 is the position side view that gear cooperates with tooth bar when being driven in rotation half cycle.
Fig. 7 is that gear is driven in rotation the position side view that 3/4ths weeks cooperated with tooth bar the time.
Fig. 8 is that gear is driven in rotation the position side view that a week cooperates with tooth bar the time.
Embodiment
Gear-tooth bar precision drive structure such as the Fig. 1 that is used for heavy machinery; Comprise gear 1 and tooth bar 2; The outer circumferential side of gear 1 is provided with gear teeth 3, and gear teeth 3 are fitted in the tooth bar teeth groove 4 along extending radially out of gear 1, and tooth bar teeth groove 4 is arranged along gear 1 rotor shaft direction; Gear teeth 3 are along the outer circumferential side helical arrangement of gear 1, and the pitch of helical arrangement (referring to the axial distance between two gear teeth 3 in a week on the helix) is one times of tooth bar 2 tooth pitches.Like Fig. 3; (orientation to be fitted to the gear teeth 3 in the tooth bar teeth groove 4 is as the criterion, and specifically in Fig. 3, is as the criterion with the orientation of reader's gear teeth 3 dorsad in the orientation of the direction of tooth bar teeth groove 4 and gear teeth 3; Be not to be as the criterion with orientation towards reader's gear teeth 3) identical; Be that tooth bar teeth groove 4 is arranged obliquely, true dip direction is identical with the orientation of gear teeth 3, so that cooperate the gear teeth 3 of helical pattern better.Gear 1 is driven in rotation a week, and its change of state is successively shown in Fig. 4～8, and through cooperatively interacting of gear teeth 3 and tooth bar teeth groove 4, along the rotor shaft direction pitch of advancing, visible one week of minimum need of helix length gets final product gear 3 just.Non-preferentially, gear teeth 3 can change double helix into and arrange, and pitch is the twice of tooth bar 2 tooth pitches.
In order to reduce friction, improve transmission efficiency, be made as rolling between gear teeth 3 and the tooth bar teeth groove 4 and contact.Like Fig. 2, present embodiment preferably rotates realization rolling contact as roll piece around gear teeth 3 thereby be with ball bearing pulley 5 at gear teeth 3 sidewalls, and fiting effect is good.Non-preferentially, can on gear teeth 3 sidewalls, be with the friction band that rotates around it, but perhaps be set as gear teeth 3 structure of rotation, perhaps on tooth bar teeth 6, be with scroll bar as roll piece.
For the ease of processing and sheathed roll piece, gear teeth 3 are preferably cylindricality.For the ease of rolling or sheathed roll piece, gear teeth 3 cross sections are preferably circle.Therefore, present embodiment is made as gear teeth 3 cylindrical.
In the present embodiment, tooth bar 2 only is located at gear 1 rotating shaft one side and gets final product, and need not around surrounding gear 1, and it is that than the winning part of screw-and-nut drive mechanism area of contact is little, so frictional force is little, and saves material.
Claims (10)
1. be used for the gear-tooth bar precision drive structure of heavy machinery, comprise gear (1) and tooth bar (2), the outer circumferential side of gear (1) is provided with gear teeth (3); Gear teeth (3) are fitted in the tooth bar teeth groove (4) along extending radially out of gear (1); It is characterized in that tooth bar teeth groove (4) is arranged along gear (1) rotor shaft direction, gear teeth (3) are along the outer circumferential side helical arrangement of gear (1); The pitch of helical arrangement is the multiple of tooth bar (2) tooth pitch; Gear (1) is driven in rotation, and through cooperatively interacting of gear teeth (3) and tooth bar teeth groove (4), gear (1) moves along rotor shaft direction.
2. gear according to claim 1-tooth bar precision drive structure is characterized in that, contacts for rolling between gear teeth (3) and the tooth bar teeth groove (4).
3. gear according to claim 2-tooth bar precision drive structure is characterized in that, described rolling contacts concrete structure and does, on gear teeth (3) sidewall, is with roll piece, and roll piece can rotate around gear teeth (3).
4. gear according to claim 3-tooth bar precision drive structure is characterized in that, said roll piece is ball bearing pulley (5).
5. according to claim 1,2 or 3 described gears-tooth bar precision drive structure, it is characterized in that gear teeth (3) are cylindricality.
6. according to claim 2 or 3 described gears-tooth bar precision drive structure, it is characterized in that gear teeth (3) cross section is circular.
7. gear according to claim 1-tooth bar precision drive structure is characterized in that, tooth bar (2) only is located at gear (1) rotating shaft one side.
8. gear according to claim 1-tooth bar precision drive structure is characterized in that, said pitch is a times of tooth bar (2) tooth pitch.
9. gear according to claim 1-tooth bar precision drive structure is characterized in that said helix length is a week.
10. gear according to claim 1-tooth bar precision drive structure is characterized in that, the direction of tooth bar teeth groove (4) is identical with the orientation of gear teeth (3).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102803104A CN102777556A (en) | 2012-08-08 | 2012-08-08 | Gear-rack precise transmission structure for heavy machinery |
| CN201210494014.4A CN103075478B (en) | 2012-08-08 | 2012-11-28 | Precision gear-rack transmission structure for heavy machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102803104A CN102777556A (en) | 2012-08-08 | 2012-08-08 | Gear-rack precise transmission structure for heavy machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102777556A true CN102777556A (en) | 2012-11-14 |
Family
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102803104A Pending CN102777556A (en) | 2012-08-08 | 2012-08-08 | Gear-rack precise transmission structure for heavy machinery |
| CN201210494014.4A Active CN103075478B (en) | 2012-08-08 | 2012-11-28 | Precision gear-rack transmission structure for heavy machinery |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210494014.4A Active CN103075478B (en) | 2012-08-08 | 2012-11-28 | Precision gear-rack transmission structure for heavy machinery |
Country Status (1)
| Country | Link |
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| CN (2) | CN102777556A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108927694A (en) * | 2017-05-23 | 2018-12-04 | 漳州东刚精密机械有限公司 | Zero back clearance drive mechanism of high speed and super precision |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105910817B (en) * | 2016-06-08 | 2019-07-02 | 重庆大学 | Variable tooth thickness gear testing stand |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004060769A (en) * | 2002-07-29 | 2004-02-26 | Toyota Motor Corp | Power mechanism |
| JP4538212B2 (en) * | 2002-10-24 | 2010-09-08 | 株式会社三共製作所 | Drive mechanism and moving table using the same |
| CN2653221Y (en) * | 2003-03-12 | 2004-11-03 | 孙建明 | Rotary moving speed variator |
| CN201412478Y (en) * | 2009-05-19 | 2010-02-24 | 马鞍山友邦重工机械有限公司 | Internal spline double-worm gearing with small reversing backlash |
| DE102010034359A1 (en) * | 2009-08-17 | 2011-02-24 | Robert Bosch Gmbh | Rotating and lifting motion producing device for use in e.g. broaching machine to rotate and lift workpiece, has ball screws with spindles that are connected to common axle for producing rotating and lifting motions |
| DE102009045857A1 (en) * | 2009-10-20 | 2011-04-21 | Robert Bosch Gmbh | Method for producing a spindle for a spindle drive, rolling screw drive with such a spindle and use of the Wälzgewindetriebs |
| CN202914655U (en) * | 2012-08-08 | 2013-05-01 | 东莞台一盈拓科技股份有限公司 | Gear-rack precision transmission structure for heavy machinery |
-
2012
- 2012-08-08 CN CN2012102803104A patent/CN102777556A/en active Pending
- 2012-11-28 CN CN201210494014.4A patent/CN103075478B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108927694A (en) * | 2017-05-23 | 2018-12-04 | 漳州东刚精密机械有限公司 | Zero back clearance drive mechanism of high speed and super precision |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103075478B (en) | 2015-07-08 |
| CN103075478A (en) | 2013-05-01 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121114 |