CN201265642Y - Installation pretightening structure of transmission case output gear shaft - Google Patents
Installation pretightening structure of transmission case output gear shaft Download PDFInfo
- Publication number
- CN201265642Y CN201265642Y CNU2008201599354U CN200820159935U CN201265642Y CN 201265642 Y CN201265642 Y CN 201265642Y CN U2008201599354 U CNU2008201599354 U CN U2008201599354U CN 200820159935 U CN200820159935 U CN 200820159935U CN 201265642 Y CN201265642 Y CN 201265642Y
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- CN
- China
- Prior art keywords
- output gear
- gear shaft
- transmission case
- bearing
- bearing seat
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to an installing and pre-tightening structure of an output gear shaft of a driving box, which comprises an output gear shaft, a bearing seat and a driving box body, wherein the bearing seat is fastened and connected to the driving box body by bolts, the output gear shaft is provided with two tapered roller bearings, and outer steel rings of the tapered roller bearings are matched with the corresponding position of the bearing seat. The installing and pre-tightening structure is characterized in that the rear end of an output gear of the output gear shaft is provided with a sleeve, a sealing ring is arranged between the sleeve and the bearing seat, and the sealing ring is fixed on the bearing seat by a cover. The utility model has simple and reasonable structure and convenient installation, can reasonably improve the stress condition of the box body in the working process, improves the service life of the driving gear and a rack, and meanwhile, the assembling and regulating difficulty of assembling personnel can be reduced in an installing process, and the driving precision of an X shaft and the production efficiency of the assembling personnel are improved.
Description
Technical field
The utility model relates to a kind of mounting and pre-tightening structure of transmission case output gear shaft, specifically is specially adapted to gantry and large-scale mobile machining center X-axis transmission case output gear shaft such as mills firmly beforehand means is installed, and belongs 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 purpose of this utility model 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.
The technological scheme that provides according to the utility model, 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 output gear shaft.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 utility model has the following advantages: the utility model 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 the utility model structure general assembly schematic representation.
Embodiment
Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:
As shown in Figure 1, the utility model transmission case output shaft installation pretension 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 utility model 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 utility model 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 shaft (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 |
|---|---|---|---|
| CNU2008201599354U CN201265642Y (en) | 2008-09-23 | 2008-09-23 | Installation pretightening structure of transmission case output gear shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201599354U CN201265642Y (en) | 2008-09-23 | 2008-09-23 | Installation pretightening structure of transmission case output gear shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201265642Y true CN201265642Y (en) | 2009-07-01 |
Family
ID=40832009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201599354U Expired - Fee Related CN201265642Y (en) | 2008-09-23 | 2008-09-23 | Installation pretightening structure of transmission case output gear shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201265642Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112325069A (en) * | 2020-10-29 | 2021-02-05 | 武汉滨湖电子有限责任公司 | Pitching transmission device and bearing clearance adjusting method thereof |
-
2008
- 2008-09-23 CN CNU2008201599354U patent/CN201265642Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112325069A (en) * | 2020-10-29 | 2021-02-05 | 武汉滨湖电子有限责任公司 | Pitching transmission device and bearing clearance adjusting method thereof |
| CN112325069B (en) * | 2020-10-29 | 2022-06-28 | 武汉滨湖电子有限责任公司 | Pitching transmission device and bearing clearance adjusting 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: 20090701 Termination date: 20150923 |
|
| EXPY | Termination of patent right or utility model |