CN202392073U - Clearance eliminating mechanism for gear rack drive systems - Google Patents
Clearance eliminating mechanism for gear rack drive systems Download PDFInfo
- Publication number
- CN202392073U CN202392073U CN2011205278532U CN201120527853U CN202392073U CN 202392073 U CN202392073 U CN 202392073U CN 2011205278532 U CN2011205278532 U CN 2011205278532U CN 201120527853 U CN201120527853 U CN 201120527853U CN 202392073 U CN202392073 U CN 202392073U
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- gear
- input shaft
- transmission system
- axle
- gear rack
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Abstract
The utility model discloses a clearance eliminating mechanism for gear rack drive systems, which is characterized in that two output gear shafts (5, 22) are provided, and an input gear (15) is respectively connected with the output gear shafts (5, 22) through two gear drive lines which are same in drive ratio; the gear drive lines are respectively provided with a drive gear (14) on an input shaft (12), and the drive gears (14) are helical gears; and the input shaft (12) is arranged on a case body (26) and a case cover (25) through two radial bearings, and one end of the input shaft (12) is provided with an axial slip trimming mechanism of the input shaft. Through adopting the technical scheme, a reverse clearance problem of gear rack drive of a machine tool is solved; and the clearance eliminating mechanism is simple in adjustment and compact in structure, and improves the drive accuracy of the machine tool.
Description
Technical field
The utility model belongs to the technical field of metal-cutting machine tool, relates to the transmission system of lathe, and more particularly, the utility model relates to a kind of elimination clearance mechanism of gear rack transmission system.
Background technique
In the machine tool feed transmission, gear rack transmission commonly used has backlass when reversing motion.In order to eliminate the gap, a lot of modes have been adopted.But in the prior art, the effect of eliminating the gap is undesirable, and certain structures is complicated, and is too huge; Some adjustment, troublesome poeration.
The model utility content
The utility model provides a kind of elimination clearance mechanism of gear rack transmission system, its objective is the backlass of eliminating the gear rack transmission.
To achieve these goals, the technological scheme taked of the utility model is:
The elimination clearance mechanism of the gear rack transmission system that the utility model provided; Described gear rack transmission system is provided with casing, case lid; Described gear rack transmission system comprises input gear, intermeshing output gear axle and tooth bar; Described input gear is installed on the input shaft, and described output gear axle is two, and described input gear is connected with described output gear axle respectively through the gear transmission route of two same gear ratios; Described gear transmission route respectively is provided with a driving gear on described input shaft, and is helical gear; Described input shaft is installed on described casing and the case lid through two radial bearings, and an end of described input shaft is provided with input shaft axial slip micro-adjusting mechanism.
Described input shaft axial slip micro-adjusting mechanism is to establish in the end of input shaft to regulate tapped hole bearing, adjusting screw thread dish, dish spring and thrust ball bearing; Its annexation is: an end of described thrust ball bearing contacts an end in contact of the other end and dish spring with adjusting screw thread dish; The other end of described dish spring contacts with the step end face of input shaft.
Establish spacer on the described box outer surface, the thickness direction of described spacer and the length direction of described tooth bar are in the same way.
The utility model adopts technique scheme, has solved the backlass problem of the gear rack transmission of lathe, and adjustment is simple, and compact structure has improved the lathe transmission accuracy.
Description of drawings
Make brief description in the face of the expressed content of each width of cloth accompanying drawing of this specification and the mark among the figure down:
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the enlarged diagram at dish spring, flange plate and band scale flange plate place among Fig. 1.
Be labeled as among the figure:
1, output gear axle gearwheel, 2, spacer, 3, tapered roller bearing, 4, spacer, 5, the output gear axle, 6, locking nut; 7, tapered roller bearing, 8, the center tooth axle, 9, gear broad in the middle, 10, locking nut, 11, the dish spring, 12, input shaft; 13, thrust ball bearing, 14, driving gear, 15, the input gear, 16, bearing housing, 17, regulate the screw thread dish, 18, regulate the tapped hole bearing; 19, center tooth axle, 20, gear broad in the middle, 21, expansion set, 22, the output gear axle, 23, output gear axle gearwheel; 24, roller bearing, 25, case lid, 26, casing, 27, spacer, 28, tooth bar.
Embodiment
Contrast accompanying drawing below,, the embodiment of the utility model is done further detailed explanation, inventive concept, the technological scheme of the utility model are had more complete, accurate and deep understanding to help those skilled in the art through description to embodiment.
Structure like the expressed the utility model of Fig. 1, Fig. 2; Elimination clearance mechanism for a kind of gear rack transmission system; Described gear rack transmission system is provided with casing 26, case lid 25; Described gear rack transmission system comprises input gear 15, intermeshing output gear axle and tooth bar 28, and described input gear 15 is installed on the input shaft 12.
In order to solve the problem that exists at the described present known technology of this specification background technique part and to overcome its defective, realize the goal of the invention of the backlass of elimination gear rack transmission, the technological scheme that the utility model is taked is:
As shown in Figure 1; The elimination clearance mechanism of the gear rack transmission system that the utility model provided; Described output gear axle is two; Be respectively output gear axle 5 and output gear axle 22, the gear transmission route of described input gear 15 through two same gear ratios is connected with described output gear axle 5, output gear axle 22 respectively; Described gear transmission route respectively is provided with a driving gear 14 on described input shaft 12, and is helical gear; Described input shaft 12 is installed on described casing 26 and the case lid 25 through two radial bearings, and an end of described input shaft 12 is provided with input shaft axial slip micro-adjusting mechanism.
Regulate through input shaft 12 trace in the axial direction, and pass through the helical gear effect of driving gear 14, make turning to of two gear transmission routes that rightabout minor rotation take place, eliminate two-way gap.
Technique scheme has solved the backlass problem of the gear rack transmission of lathe, and adjustment is simple, and compact structure has improved the transmission accuracy of lathe.
Described driving gear 14 is through locking nut 10 axial locking on input shaft 12.
By shown in Figure 1, two gear transmission routes are respectively:
(1): input gear 15; Input shaft 12; Driving gear 14; Gear 9 broad in the middle; Center tooth axle 8; Countershaft-gear; Output gear axle gearwheel 1; Output gear axle 5.
(2): input gear 15; Input shaft 12; Driving gear; Gear 20 broad in the middle; Center tooth axle 19; Countershaft-gear; Output gear axle gearwheel 23; Output gear axle 22.
This bidentate wheel rack transmission system, rotating speed, is passed to respectively on output gear axle 5 and the output gear axle 22 by center tooth axle 8, center tooth axle 19 through above-mentioned two drive paths by 15 inputs of input gear again, and drives tooth bar 28 moving linearlies.
Wherein, install on casing 26, case lid 25 through tapered roller bearing 7 respectively at the two ends of center tooth axle 8.Center tooth axle 19 also adopts same supporting structure.
Output gear axle gearwheel 1 adopts locking nut 6 axial locking on output gear axle 5.
The output terminal of described output gear axle 5 is bearing on the casing 26 through two tapered roller bearings 3; Pass through spacer 4 axial limitings between described two tapered roller bearings 3.The supporting structure of this end of described output gear axle 22 is identical therewith.
Described output gear axle gearwheel 1 passes through spacer 2 axial limitings with tapered roller bearing 3.
The end opposite of the output terminal on the described output gear axle 22 adopts roller bearing 24 to carry out radial support.The supporting structure of the end opposite of the output terminal on the described output gear axle 8 is identical therewith.
Output gear axle gearwheel 23 adopts expansion set 21 on output gear axle 22, to fixedly mount.
As shown in Figure 2, input shaft axial slip micro-adjusting mechanism is:
Described input shaft axial slip micro-adjusting mechanism is to establish in the end of input shaft 12 to regulate tapped hole bearing 18, adjusting screw thread dish 17, dish spring 11 and thrust ball bearing 13; Its annexation is: an end of described thrust ball bearing 13 contacts an end in contact of the other end and dish spring 11 with adjusting screw thread dish 17; The other end of described dish spring 11 contacts with the step end face of input shaft 12.
Wherein, between dish spring 11 and the thrust ball bearing 13, also be provided with bearing housing 16.Bearing housing 16 has also played radially spacing effect.
On adjusting screw thread dish 17, be provided with hexagon head, regulate with the convenient manual tune instrument that adopts.
Establish spacer 27 on described casing 26 outer surfaces, the length direction of the thickness direction of described spacer 27 and described tooth bar 28 in the same way.
The regulating method of above-mentioned controlling mechanism is:
Assemble each grade axle, gear, bearing in the gear housing, comprise to the certain precompression of dish spring 11, the spacer 27 of adjustment casing 26 sides makes a contacts side surfaces of output gear axle 5 and the tooth of tooth bar 28, the position of static housing 26;
The adjusting screw thread dish 17 of scale is carved with in rotation, presses down dish spring 11, adjusts another output gear axle 22, and tooth axle 22 is contacted with the another side of the tooth of tooth bar 28, eliminates the gap.
Combine accompanying drawing that the utility model has been carried out exemplary description above; Obviously the concrete realization of the utility model does not receive the restriction of aforesaid way; As long as adopted the method design of the utility model and the improvement of the various unsubstantialities that technological scheme is carried out; Or the design of the utility model and technological scheme are directly applied to other occasion without improving, all within the protection domain of the utility model.
Claims (3)
1. the elimination clearance mechanism of a gear rack transmission system; Described gear rack transmission system is provided with casing (26), case lid (25); Described gear rack transmission system comprises input gear (15), intermeshing output gear axle (5,22) and tooth bar (28); Described input gear (15) is installed on the input shaft (12); It is characterized in that: described output gear axle (5,22) is two, and described input gear (15) is connected with described output gear axle (5,22) respectively through the gear transmission route of two same gear ratios; Described gear transmission route respectively is provided with a driving gear (14) on described input shaft (12), and is helical gear; Described input shaft (12) is installed on described casing (26) and the case lid (25) through two radial bearings, and an end of described input shaft (12) is provided with input shaft axial slip micro-adjusting mechanism.
2. according to the elimination clearance mechanism of the described gear rack transmission system of claim 1; It is characterized in that: described input shaft axial slip micro-adjusting mechanism is to establish in the end of input shaft (12) to regulate tapped hole bearing (18), adjusting screw thread dish (17), dish spring (11) and thrust ball bearing (13); Its annexation is: an end of described thrust ball bearing (13) contacts an end in contact of the other end and dish spring (11) with adjusting screw thread dish (17); The other end of described dish spring (11) contacts with the step end face of input shaft (12).
3. according to the elimination clearance mechanism of the described gear rack transmission system of claim 1, it is characterized in that: establish spacer (27) on described casing (26) outer surface, the length direction of the thickness direction of described spacer (27) and described tooth bar (28) in the same way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205278532U CN202392073U (en) | 2011-12-16 | 2011-12-16 | Clearance eliminating mechanism for gear rack drive systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205278532U CN202392073U (en) | 2011-12-16 | 2011-12-16 | Clearance eliminating mechanism for gear rack drive systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202392073U true CN202392073U (en) | 2012-08-22 |
Family
ID=46667000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205278532U Expired - Fee Related CN202392073U (en) | 2011-12-16 | 2011-12-16 | Clearance eliminating mechanism for gear rack drive systems |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202392073U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494108A (en) * | 2011-12-16 | 2012-06-13 | 芜湖恒升重型机床股份有限公司 | Gap removal mechanism for pinion-and-rack transmission system |
| CN103953714A (en) * | 2014-05-12 | 2014-07-30 | 东莞华中科技大学制造工程研究院 | Gear rack clearance eliminating mechanism |
-
2011
- 2011-12-16 CN CN2011205278532U patent/CN202392073U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494108A (en) * | 2011-12-16 | 2012-06-13 | 芜湖恒升重型机床股份有限公司 | Gap removal mechanism for pinion-and-rack transmission system |
| CN103953714A (en) * | 2014-05-12 | 2014-07-30 | 东莞华中科技大学制造工程研究院 | Gear rack clearance eliminating mechanism |
| CN103953714B (en) * | 2014-05-12 | 2016-08-17 | 广东华中科技大学工业技术研究院 | Gear rack anti-backlash mechanism |
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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: 20120822 Termination date: 20151216 |
|
| EXPY | Termination of patent right or utility model |