CN202707833U - Flexible drive shaft - Google Patents
Flexible drive shaft Download PDFInfo
- Publication number
- CN202707833U CN202707833U CN 201220276124 CN201220276124U CN202707833U CN 202707833 U CN202707833 U CN 202707833U CN 201220276124 CN201220276124 CN 201220276124 CN 201220276124 U CN201220276124 U CN 201220276124U CN 202707833 U CN202707833 U CN 202707833U
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- China
- Prior art keywords
- coupling shaft
- joint
- flexible drive
- drive axle
- main body
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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 a flexible drive shaft. The flexible drive shaft comprises a first connecting shaft and a second connecting shaft, which are connected with each other. According to the technical scheme provided by the utility mode, by adopting the flexible drive shaft comprising the first connecting shaft and the second connecting shaft, the previous rigid drive shaft is replaced, so that when the drive shaft and a part locating center have an error, the error can be adjusted and compensated through connection of the first connecting shaft and the second connecting shaft, coaxiality of the whole drive mechanism is ensured, and accuracy of the testing data is ensured.
Description
Technical field
The utility model relates to a kind of flexible drive axle, especially is applied to the flexible drive axle of high rotating speed occasion.
Background technique
Rotor is the important component of aeroengine, along with the development of science and technology, the performance of aero-turbine improves constantly, and its power turbine just coils the future development of elongated hollow axial ratio towards high rotating speed, large footpath, working speed often is higher than crooked critical rotary speed, and structure is day by day complicated.
As high-precision member, rotor need to carry out to component wherein every strict testing property before assembling, for example high-speed balancing test.Fig. 1 is the sectional view of traditional transmission shaft, as shown in Figure 1, the left end of transmission shaft 1 is connected with live axle, described connection is carried out by means of coupling or elastic coupling flexible coupling usually, the outer peripheral surface of its right-hand member is connected with part by for example spline, thereby transmission shaft 1 passes to part with the moment of torsion of live axle.Described part can be 1 meter long major axis for example, and it is fixed on a pair of rigid rocker, and the high workload during test turns 21000 rev/mins of scooters.
When carrying out the high-speed balancing test, because rotating speed is very high, wish to keep again simultaneously preferably coaxality (for example 0.006 millimeter), therefore very high to the positioning accuracy request between transmission shaft and the part.According to above-mentioned traditional transmission shaft structure, owing between the coupling of live axle and the part (major axis) transmission shaft only being set, if error appears in the centre of location of this transmission shaft and part, to be difficult to adjust and compensate, thereby cause the amount of unbalance of rigid rocker of retaining element excessive, affect the accuracy of test data.
Be difficult to the problem adjusting and compensate for the centre of location error of the transmission shaft that exists in the prior art and part, not yet propose at present effective solution.
The model utility content
Main purpose of the present utility model provides a kind of flexible drive axle, is difficult to the technical problem of adjusting and compensating with the centre of location error that solves the transmission shaft that exists in the prior art and part.
To achieve these goals, according to an aspect of the present utility model, provide a kind of flexible drive axle, described flexible drive axle comprises interconnective the first coupling shaft and the second coupling shaft.
Further, in described flexible drive axle, described the first coupling shaft and the second coupling shaft interconnect by spline.Preferably, described spline is involute splines.
Further, in described flexible drive axle, described the first coupling shaft has involute straight-tooth spline, and described the second coupling shaft has involute crowned teeth spline, and described the first coupling shaft and the second coupling shaft interconnect by described involute straight-tooth spline and involute crowned teeth spline.
Further, in described flexible drive axle, described the first coupling shaft comprises the first coupling shaft main body, be positioned at described the first coupling shaft main body first end the first joint and be positioned at the second joint of the second end of described the first coupling shaft main body, described the second joint is formed on the inner peripheral surface of the second end of described the first coupling shaft main body; Described the second coupling shaft comprises the second coupling shaft main body, be positioned at described the second coupling shaft main body first end the 3rd joint and be positioned at the 4th joint of the second end of described the second coupling shaft main body; Described the second joint and the 3rd joint interconnect.
Further, in described flexible drive axle, described the second joint has involute straight-tooth spline, and described the 3rd joint has involute crowned teeth spline, and described the second joint and the 3rd joint interconnect by described involute straight-tooth spline and involute crowned teeth spline.
Further, in described flexible drive axle, the shoulder of the joint of described the first joint and live axle has the grooving of excision root.Preferably, described grooving all is invaginated type with respect to external cylindrical surface and the end face of described shoulder.
Further, in described flexible drive axle, also be provided with angular contact ball bearing on the outer peripheral surface of described the first coupling shaft main body, described angular contact ball bearing is installed in stationary positioned and puts.
According to the technical solution of the utility model, the flexible drive axle that has comprised the first coupling shaft and the second coupling shaft by employing, the transmission shaft of a rigidity before having replaced, thereby when error appears in transmission shaft and the part centre of location, can be adjusted and be compensated by the connection between the first coupling shaft and the second coupling shaft, be conducive to guarantee the coaxality of whole driving mechanism, guaranteed the accuracy of test data.
Description of drawings
Figure of description is used to provide further understanding of the present utility model, consists of a part of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the sectional view of traditional transmission shaft;
Fig. 2 (a) is the sectional view according to the first coupling shaft of flexible drive axle of the present utility model;
Fig. 2 (b) is the enlarged view according to the shoulder part-structure of the first coupling shaft of the present utility model;
Fig. 3 (a) is the structural representation according to the second coupling shaft of flexible drive axle of the present utility model;
Fig. 3 (b) is along 3(a) in the sectional view of T line; And
Fig. 4 is the mounting structure schematic diagram according to flexible drive axle of the present utility model.
Embodiment
Need to prove, in the situation that clearly limit or do not conflict, the feature among each embodiment of the present utility model can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.
In order to solve problems of the prior art, the utility model provides a kind of flexible drive axle, and it comprises interconnective the first coupling shaft and the second coupling shaft, is used for replacing traditional transmission shaft shown in Figure 1.Fig. 2 (a) is the sectional view according to the first coupling shaft of flexible drive axle of the present utility model, Fig. 2 (b) is the enlarged view according to the shoulder part-structure of the first coupling shaft of the present utility model, and Fig. 3 (a) is the structural representation according to the second coupling shaft of flexible drive axle of the present utility model.
Shown in Fig. 2 (a), the overall structure of the first coupling shaft 2 and traditional transmission shaft 1 is similar, difference is, no longer is provided with the joint that is connected with part on the outer peripheral surface of the first coupling shaft 2 right-hand members, but is provided with the second joint 2-2 at the inner peripheral surface of right-hand member.Thus, the first coupling shaft 2 comprise the first coupling shaft main body 2-3, the first joint 2-1 on (i.e. the first end of the first coupling shaft main body) end face that is positioned at left end and be positioned at the second joint 2-2 on the inner peripheral surface of right-hand member (i.e. the second end of the first coupling shaft main body).
The the first joint 2-1 that is connected with live axle (Fig. 2 (a) is not shown) is positioned on the left side of the first coupling shaft main body 2-3, and outwards slightly outstanding, thereby has formed shoulder 2-4, be used for live axle between the location be connected.Being connected usually between the first joint 2-1 and the live axle carried out by means of coupling or elastic coupling flexible coupling, the height of the diameter of described the first joint 2-1 and shoulder 2-4 is then determined according to the live axle structure that cooperates with it, the zone of left side outside shoulder of the first coupling shaft main body 2-3 is formed with several attachment holes, be used for live axle between firm the connection.
Fig. 2 (b) is the enlarged view according to the shoulder part-structure of the first coupling shaft of the present utility model, preferably, described shoulder 2-4 has the grooving of excision root, namely, two planes that the script of shoulder 2-4 is substantially vertical in the intersection (being root) carry out Partial Resection, thereby described grooving all is invaginated type with respect to external cylindrical surface and the end face of shoulder.Shown in Fig. 2 (b), can select different excision angle, radius and the degree of depth, with the structure that obtains expecting.By form the grooving of excision root at shoulder 2-4 place, be conducive to realize the accurate location between the first coupling shaft and the live axle, and avoided root at shoulder to produce stress and concentrated.
Preferably, for the weight that alleviates the first coupling shaft 2 and reduce cost, the first coupling shaft 2 is hollow shaft, but the first coupling shaft main body 2-3 left end (i.e. the first end of the first coupling shaft main body) part has less hollow internal diameter, so that form the first joint 2-1 and improve its join strength.At the first coupling shaft main body 2-3 right-hand member (i.e. the second end of the first coupling shaft main body), the second joint 2-2 is formed on the inner peripheral surface of hollow hole.
Shown in Fig. 3 (a), the second coupling shaft 3 comprises the second coupling shaft main body 3-3 of elongate cylindrical shape and lays respectively at the 3rd joint 3-1, the 4th joint 3-2 of its two ends (i.e. the first end of the second coupling shaft main body and the second end), therefore formed the structure of " double end ".The radius of described the 3rd joint 3-1 and the 4th joint 3-2 is all greater than the radius of the second coupling shaft main body 3-3, and the size of the second joint 2-2 of the size of the 3rd joint 3-1 and aforementioned the first coupling shaft 2 is complementary, to realize connection and transmitting torque between the two, the size of the 4th joint 3-2 is then determined according to the part that is attached thereto.In order to guarantee join strength, the second coupling shaft 3 is preferably solid structure.
Preferably, the 3rd joint 3-1 has involute crowned teeth spline, and shown in the sectional view of Fig. 3 (b), described profile of tooth has the cydariform curve of evagination, for example can be made of one section camber line.
As shown in Figure 4, such as the current embodiment's of the utility model flexible drive axle when installing and using, the first joint 2-1 of the first coupling shaft 2 is connected with live axle, the second joint 2-2 is connected with the 3rd joint 3-1 of the second coupling shaft 3, the 4th joint 3-2 is connected with part 6 again, thereby the moment of torsion of live axle is passed to part 6.By transmission shaft being divided into interconnective the first coupling shaft and second coupling shaft two-part, the transmission shaft of a rigidity before having replaced, thereby when error appears in transmission shaft and the part centre of location, can be adjusted and be compensated by the connection between the first coupling shaft and the second coupling shaft, so that described transmission shaft has obtained " flexibility " to a certain degree, be conducive to guarantee to make up the coaxality of rear whole driving mechanism, guaranteed the accuracy of test data.
Preferably, pass through spline joint between the 3rd joint 3-1 of the second coupling shaft 3 and the second joint 2-2 of the first coupling shaft 2, thereby so that described connection has higher bearing capacity, centering precision is high and steering capability good.Described connection also can adopt involute splines to connect, to be conducive to transmit larger moment of torsion.
More preferably, the second joint 2-2 adopts involute straight-tooth spline, the 3rd joint 3-1 then adopts involute crowned teeth spline, thereby formed the linkage structure of involute straight-tooth-involute crowned teeth at the intermediate portion of described flexible drive axle, utilize the structure of crowned teeth further to enlarge contact Tooth, thereby further improved the error compensation ability.The profile of tooth of described involute straight-tooth spline and involute crowned teeth spline preferably adopts the identical grade of tolerance, the number of teeth, modulus and pressure angle, makes and combination with convenient, for example can adopt that the 6H grade of tolerance, the number of teeth are 16, modulus 2, pressure angle 30 degree.
As shown in Figure 4, can also angular contact ball bearing 4 be set at the outer peripheral surface of described the first coupling shaft main body 2-3, described angular contact ball bearing 4 is installed on the stationary positioned cover 5, and described stationary positioned cover is fixedly connected with the anchor clamps of clamping part 6 again.Described angular contact ball bearing 4 can bear take radial load as main radially, axial connected load, thereby can guarantee better coaxality, quality of fit and stability between flexible drive axle and the part.
The flexible drive axle according to embodiment of the present utility model has been described according to Fig. 2 (a)-Fig. 4 in the front.Obviously, those skilled in the art should be understood that, the all parts of flexible drive axle of the present utility model is not limited to the described concrete structure of this embodiment, for example, described first or the concrete structure of each joint of the second coupling shaft, can determine according to the factors such as convenience of the component, processing or the connection that cooperate with it.As long as described flexible drive axle comprises the two-part that interconnect with transmitting torque, this transmission shaft is compared with the transmission shaft of a traditional rigidity obtain to a certain degree capable of regulating and the ability of compensating error, can realize the purpose of the utility model, all belong to embodiment of the present utility model.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (9)
1. a flexible drive axle is characterized in that, described flexible drive axle comprises interconnective the first coupling shaft and the second coupling shaft.
2. flexible drive axle according to claim 1 is characterized in that, described the first coupling shaft and the second coupling shaft interconnect by spline.
3. flexible drive axle according to claim 1 is characterized in that, described the first coupling shaft and the second coupling shaft interconnect by involute splines.
4. flexible drive axle according to claim 1, it is characterized in that, described the first coupling shaft has involute straight-tooth spline, described the second coupling shaft has involute crowned teeth spline, and described the first coupling shaft and the second coupling shaft interconnect by described involute straight-tooth spline and involute crowned teeth spline.
5. flexible drive axle according to claim 1, it is characterized in that, described the first coupling shaft comprises the first coupling shaft main body, be positioned at described the first coupling shaft main body first end the first joint and be positioned at the second joint of the second end of described the first coupling shaft main body, described the second joint is formed on the inner peripheral surface of the second end of described the first coupling shaft main body; Described the second coupling shaft comprises the second coupling shaft main body, be positioned at described the second coupling shaft main body first end the 3rd joint and be positioned at the 4th joint of the second end of described the second coupling shaft main body; Described the second joint and the 3rd joint interconnect.
6. flexible drive axle according to claim 5, it is characterized in that, described the second joint has involute straight-tooth spline, described the 3rd joint has involute crowned teeth spline, and described the second joint and the 3rd joint interconnect by described involute straight-tooth spline and involute crowned teeth spline.
7. according to claim 5 or 6 described flexible drive axles, it is characterized in that, the shoulder of the joint of described the first joint and live axle has the grooving of excision root.
8. flexible drive axle according to claim 7 is characterized in that, described grooving all is invaginated type with respect to external cylindrical surface and the end face of described shoulder.
9. flexible drive axle according to claim 7 is characterized in that, also is provided with angular contact ball bearing on the outer peripheral surface of described the first coupling shaft main body, and described angular contact ball bearing is installed in stationary positioned and puts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220276124 CN202707833U (en) | 2012-06-12 | 2012-06-12 | Flexible drive shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220276124 CN202707833U (en) | 2012-06-12 | 2012-06-12 | Flexible drive shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202707833U true CN202707833U (en) | 2013-01-30 |
Family
ID=47588140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220276124 Expired - Fee Related CN202707833U (en) | 2012-06-12 | 2012-06-12 | Flexible drive shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202707833U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107215206A (en) * | 2016-03-22 | 2017-09-29 | 陕西通力专用汽车有限责任公司 | Expanded letter mine truck driver and its installation method, expanded letter mine truck |
| CN108909933A (en) * | 2018-08-08 | 2018-11-30 | 八方电气(苏州)股份有限公司 | The connection structure of built-in motor and chain wheel |
-
2012
- 2012-06-12 CN CN 201220276124 patent/CN202707833U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107215206A (en) * | 2016-03-22 | 2017-09-29 | 陕西通力专用汽车有限责任公司 | Expanded letter mine truck driver and its installation method, expanded letter mine truck |
| CN108909933A (en) * | 2018-08-08 | 2018-11-30 | 八方电气(苏州)股份有限公司 | The connection structure of built-in motor and chain wheel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 412002 Dong Jiaduan, Zhuzhou, Hunan Patentee after: China Hangfa South Industrial Co. Ltd. Address before: 412002 Dong Jiaduan, Zhuzhou, Hunan Patentee before: China Southern Airlines Industry (Group) Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20200612 |