CN101377234A - Mounting and pre-tightening structure of transmission case output gear shaft - Google Patents
Mounting and pre-tightening structure of transmission case output gear shaft Download PDFInfo
- Publication number
- CN101377234A CN101377234A CNA2008101566656A CN200810156665A CN101377234A CN 101377234 A CN101377234 A CN 101377234A CN A2008101566656 A CNA2008101566656 A CN A2008101566656A CN 200810156665 A CN200810156665 A CN 200810156665A CN 101377234 A CN101377234 A CN 101377234A
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- output gear
- gear shaft
- transmission case
- bearing
- bearing seat
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Abstract
The present invention relates to an installation pretightening structure of the output gear shaft of a gearbox, and comprises an output gear shaft, a bearing seat and a transmission box body. The bearing seat is fixedly connected with the transmission box body through a bolt; two tapered roller bearings are arranged on the output gear shaft; the external steel rings of the tapered roller bearings match the corresponding position of the bearing seat. The installation pretightening structure is characterized in that a sleeve is arranged at the rear end of the output gear of the output gear shaft; a sealing ring is positioned between the sleeve and the bearing seat; and a cover is used for fixing the sealing ring on the bearing seat. The present invention has the advantages of simple and reasonable structure and convenient installation, reasonably improves the force bearing condition of the transmission box body, improves the force bearing condition of the box body in the working process, prolongs the service life of the transmission box and the rack, simultaneously lowers the difficulties in assembly and debugging of the assembly personnel in the installation process, and enhances the transmission accuracy of the X axle and the production efficiency of the assembly personnel.
Description
Technical field
The present invention relates to a kind of mounting and pre-tightening structure of transmission case output gear shaft, specifically be specially adapted to gantry and large-scale mobile machining center X-axis transmission case output gear shaft such as mill firmly beforehand means is installed, belong to the mechanical structure technical field.
Background technique
Along with the high speed development of China's mechanical industry, the especially development of heavy industry, more and more to the demand of large-scale gold machining equipment such as numerical control gantry mill; Simultaneously the technical parameter of equipment is had higher requirement.For the such main equipment of numerical control gantry mill, the stroke specification of lathe is big (the X-axis stroke is usually more than 8 meters) also, and ball screw or tooth bar transmission are adopted in the driving of general this long stroke.This dual mode respectively has pluses and minuses, in the ball screw transmission, need overcome the deformation effect that action of gravity produces leading screw; And in the tooth bar transmission, need overcome the influence of gear to transmission accuracy.
In the prior art, in the solution of existing use tooth bar transmission, generally be on the tank wall of the front and back of transmission case, to process the antero posterior axis bearing that the transmission case gear shaft is installed.Carrying out transmission case when assembling, the front and back spring bearing of mounting teeth wheel shaft on the antero posterior axis bearing respectively, and provide pretension with locking nut for take-off (propeller) shaft in the rear end of back spring bearing, pretightening force acts on respectively on the front and back tank wall of transmission case like this.But under normal conditions, owing to do not arrange the space of stiffening rib in the transmission case, this just makes the transmission tank wall produce distortion under the pretightening force effect, and directly installation precision and the using effect to transmission case impacts.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, thereby provide a kind of mounting and pre-tightening structure of transmission case output gear shaft, can reach pretension effect to gear shaft, simultaneously can not make the tank wall stress deformation again, can improve the installation precision and the using effect of transmission case, also can improve the overall precision of lathe simultaneously.
According to technological scheme provided by the invention, the mounting and pre-tightening structure of transmission case output gear shaft, comprise output gear shaft, bearing support, transmission case body, bearing support is fastenedly connected on transmission case body with screw, two tapered roller bearings are set on the described output gear shaft, the tapered roller bearing outer rim cooperates with the relevant position of bearing support, feature is that the output gear rear end of described output gear shaft is provided with a cover, seal ring is installed between cover and the bearing support, lid is fixed on seal ring on the bearing support, cover and seal ring are formed a seal arrangement, deep groove ball bearing is installed in the described output gear shaft rear end bearing seat is used to support the output gear axle.Between described transmission case body and the bearing support spacer is installed, spacer is to be used for installing adjusting.
Compared with the prior art the present invention has the following advantages: the present invention is simple and reasonable for structure, easy for installation, can reasonably improve the stressing conditions of transmission case body, also improve casing stressing conditions in the course of the work, increased the working life of transmission case and tooth bar; Also reduce simultaneously assembly crewman's assembling and setting difficulty when mounted, improved the transmission accuracy of X-axis and assembly crewman's manufacturing efficiency.
Description of drawings
Fig. 1 is a structure general assembly schematic representation of the present invention.
Embodiment
Embodiment during following the present invention incites somebody to action in conjunction with the accompanying drawings is further described:
As shown in Figure 1, transmission case output shaft installation pretension of the present invention mainly is made up of output gear shaft 1, cover 2, lid 3, seal ring 4, bearing support 5, tapered roller bearing 6, locking nut 8, deep groove ball bearing 9, spacer 10 and bearing support 11.
The present invention adopts bearing support 5 usefulness screws to be fastenedly connected on transmission case body 7, be arranged in two tapered roller bearings 6 on the output gear shaft 1, its outer rim cooperates with the relevant position of bearing support 5, a cover 2 is settled in output gear rear end partly at output gear shaft 1, seal ring 4 is installed between cover 2 and the bearing support 5, lid 3 is used for seal ring 4 being fixed and only being consolidated at bearing support 5 with screw, cover 2 and seal ring 4 are formed a seal arrangement, prevent that dust impurity from entering tapered roller bearing 6 work that influence, locking nut 8 is installed on one section thread groove of output gear shaft 1, locking by locking nut 8 provides pretightening force, pretightening force is not delivered on the transmission case body like this, just can not make transmission case body produce stress deformation.Deep groove ball bearing 9 is installed in another bearing support 11 of output gear shaft 1 rear end is used to support output gear shaft 1.Spacer 10 is installed between described transmission case body 7 and the bearing support 11, and spacer 10 is to be used for installing adjusting.
The present invention mainly is the thickness that suitably increases front-end bearing pedestal, and the tapered roller bearing that originally is arranged on the antero posterior axis bearing is arranged in front-end bearing pedestal, and increases spring bearing at rear bearing block; Bearing Installation surface rear end at take-off (propeller) shaft increases screw thread simultaneously, and being used to install locking nut provides pretightening force for take-off (propeller) shaft, and this just makes pretightening force not act on the transmission tank wall, does not cause the stress deformation of transmission case integral body, has guaranteed transmission accuracy.
Claims (2)
1, a kind of mounting and pre-tightening structure of transmission case output gear shaft, comprise output gear shaft (1), bearing support (5), transmission case body (7), bearing support (5) is fastenedly connected on transmission case body (7), it is characterized in that: two tapered roller bearings (6) are set on the described output gear shaft (1), tapered roller bearing (6) outer rim matches with bearing support (5), the output gear rear end of described output gear shaft (1) is provided with cover (2), seal ring (4) is installed between cover (2) and the bearing support (5), lid (3) is fixed on seal ring (4) on the bearing support (5), deep groove ball bearing (9) is installed in described output gear shaft (1) the rear end bearing seat (11) is used to support output gear axle (1).
2, the mounting and pre-tightening structure of a kind of transmission case output gear shaft according to claim 1 is characterized in that between described transmission case body (7) and the bearing support (11) spacer (10) being installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101566656A CN101377234A (en) | 2008-09-23 | 2008-09-23 | Mounting and pre-tightening structure of transmission case output gear shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101566656A CN101377234A (en) | 2008-09-23 | 2008-09-23 | Mounting and pre-tightening structure of transmission case output gear shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101377234A true CN101377234A (en) | 2009-03-04 |
Family
ID=40420910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101566656A Pending CN101377234A (en) | 2008-09-23 | 2008-09-23 | Mounting and pre-tightening structure of transmission case output gear shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101377234A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889308A (en) * | 2011-07-22 | 2013-01-23 | 吴江市宏亿纺织有限公司 | Output shaft device |
| CN102889309A (en) * | 2011-07-22 | 2013-01-23 | 吴江市宏亿纺织有限公司 | Output shaft device |
| CN104500710A (en) * | 2014-12-30 | 2015-04-08 | 上海汉虹精密机械有限公司 | Zero-backlash gear case of numerical control circular sawing machine |
| CN104747692A (en) * | 2013-12-26 | 2015-07-01 | 上海汽车集团股份有限公司 | Method for improving assembly precision of transmission |
| CN110371803A (en) * | 2019-06-18 | 2019-10-25 | 必成玻璃纤维(昆山)有限公司 | A kind of filament winding machine taenidium with long service life leads transmission case |
-
2008
- 2008-09-23 CN CNA2008101566656A patent/CN101377234A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889308A (en) * | 2011-07-22 | 2013-01-23 | 吴江市宏亿纺织有限公司 | Output shaft device |
| CN102889309A (en) * | 2011-07-22 | 2013-01-23 | 吴江市宏亿纺织有限公司 | Output shaft device |
| CN104747692A (en) * | 2013-12-26 | 2015-07-01 | 上海汽车集团股份有限公司 | Method for improving assembly precision of transmission |
| CN104747692B (en) * | 2013-12-26 | 2018-02-27 | 上海汽车集团股份有限公司 | The method for improving speed changer assembly precision |
| CN104500710A (en) * | 2014-12-30 | 2015-04-08 | 上海汉虹精密机械有限公司 | Zero-backlash gear case of numerical control circular sawing machine |
| CN110371803A (en) * | 2019-06-18 | 2019-10-25 | 必成玻璃纤维(昆山)有限公司 | A kind of filament winding machine taenidium with long service life leads transmission case |
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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 |
Open date: 20090304 |