CN206830632U - Scalable power transmission shaft - Google Patents
Scalable power transmission shaft Download PDFInfo
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- CN206830632U CN206830632U CN201720524351.1U CN201720524351U CN206830632U CN 206830632 U CN206830632 U CN 206830632U CN 201720524351 U CN201720524351 U CN 201720524351U CN 206830632 U CN206830632 U CN 206830632U
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Abstract
The utility model provides a kind of scalable power transmission shaft, is related to technical field of mechanical transmission, can be applied to transmit stretching frequency and the larger operating mode occasion of stroke during moment of torsion.Main technical schemes of the present utility model are：A kind of scalable power transmission shaft includes：Axis body and the external member for being socketed on axis body, axis body and external member are by key connection, so that axis body can together be rotated with external member and relative slip；Chamber is provided with axis body, is used to store lubricating oil in chamber, through hole is provided with the side wall of chamber, through hole is communicated in the key connection region between axis body and external member, and two side positions between axis body and external member outside key connection region mutually seal；Axis body is used to connect first component, and external member is used to connect second component, so as to pass through axis body and the key connection passing power of external member between first component and second component.Scalable power transmission shaft is mainly used in transmitting moment of torsion and is capable of the flexible of upper frequency and stroke.
Description
Technical field
It the utility model is related to technical field of mechanical transmission, more particularly to a kind of scalable power transmission shaft.
Background technology
Power transmission shaft is the part for being capable of passing power, such as in automotive transmission, the effect of power transmission shaft be with gearbox,
The power of engine is passed to wheel by drive axle together, automobile is produced driving force.
At present, common power transmission shaft includes mine car or automobile using universal drive shaft and steel rolling universal drive shaft, wherein,
Mine car or automobile using universal drive shaft can stretch with the vibration fine motion of vehicle in use, by setting nylon etc. to rub
The relatively low material of coefficient reduces the frictional force in power transmission shaft fine motion telescopic process；Steel rolling with universal drive shaft in use
It is not flexible.
Inventor has found that at least there are the following problems in the prior art：When driveshaft applications are in will not only transmit moment of torsion, and
And not stop also to stretch at work (stroke is in more than 30mm) operating mode in when, power transmission shaft can not normal work, i.e., it is enabled
The flexible power transmission shaft of enough fine motions will soon it is too high because of temperature, stick together lubrication is not smooth, then destroy.
Utility model content
In view of this, the utility model embodiment provides a kind of scalable power transmission shaft, can be applied to transmit moment of torsion process
The larger operating mode occasion of middle stretching frequency and stroke.
To reach above-mentioned purpose, the utility model mainly provides following technical scheme：
The utility model embodiment provides a kind of scalable power transmission shaft, including：
Axis body and the external member for being socketed on the axis body, the axis body and the external member are by key connection, so that the axis body
It can together rotate with the external member and slide relatively；
Chamber is provided with the axis body, is used to store lubricating oil in the chamber, is provided with the side wall of the chamber
Through hole, the through hole is communicated in the key connection region between the axis body and the external member, between the axis body and the external member
Two side positions outside key connection region mutually seal；
The axis body is used to connect first component, and the external member is used to connect second component so that the first component with
Pass through the axis body and the key connection passing power of the external member between the second component.
Specifically, the external member includes sleeve pipe and is sealedly attached to the support components support at described sleeve pipe both ends respectively, described
Sleeve pipe is socketed on the axis body with the axis body by key connection, the support components support sealing；The support components support includes sliding
Guide bearing, the support that the slide-and-guide bearing includes setting around the axis body and being in contact with the axis body are oriented to knot
Structure.
Specifically, the support components support also includes end cap, and the slide-and-guide bearing is anchored on described by the end cap
The end of sleeve pipe, seal between the slide-and-guide bearing and described sleeve pipe, sealed between the end cap and the axis body.
Specifically, the slide-and-guide bearing includes fixed cover and the first set being fixed on the fixed cover inwall
Ring, first collar are the support guide frame, and oil-recovery tank, the oil-recovery tank are provided with the inwall of first collar
Around the inwall in axial direction spiral setting of first collar.
Specifically, the slide-and-guide bearing includes fixed cover and is slidably connected to second set of the fixed cover inwall
Ring, second collar are fixedly sheathed in the axis body, and second collar is the support guide frame.
Specifically, through the end face of the axis body, the other end of the chamber is plugged in institute for one end of the chamber
State in axis body, one end of the chamber is blocked by piston component, and the piston component includes the piston bush and close of both ends connection
The piston core being encapsulated in the piston bush, one end of the piston bush and the chamber are tightly connected.
Specifically, the piston core is connected to the centre position in the piston bush by elastomeric element, wherein, the bullet
Property part include out of described piston bush one end to described piston core one end Part I, and out of described piston bush it is another
Hold to the Part II of the piston core other end；
The piston bush is sealedly attached to the inside of the chamber.
Specifically, the through hole includes the first through hole of two avris positioned at the key connection region, the first through hole
Between the position that the axis body mutually seals with the external member and the key connection region；The through hole is also included positioned at described
The second through hole in key connection region, the aperture of second through hole are less than the aperture of the first through hole.
Specifically, the first through hole is uniformly arranged multiple for one week around the axis body；The quantity bag of second through hole
Include multiple, first through hole of axial direction of multiple second through holes along the axis body in the avris of key connection region two
Between it is evenly distributed.
Specifically, the axis body is connected with the external member by spline；One end of the external member is connected with the first joint, its
In, one end of the external member and one end of the axis body are same direction, and the other end of the axis body is connected with the second joint.
A kind of scalable power transmission shaft that the utility model embodiment provides, its axis body, by key connection, make axis body with external member
With external member transmit moment of torsion simultaneously can Relative sliding, by being stored in lubricating oil in the chamber of axis body, lubricating oil passes through through hole stream
To the key connection region between axis body and external member, sufficient lubrication key connection region so that when Relative sliding between axis body and external member
When, lubricating oil reduces kinetic force of friction, reduces temperature caused by friction, so that axis body and the smooth Relative sliding of external member, you can stretch
Contracting power transmission shaft is smoothed out stretching, and avoids power transmission shaft in the prior art and sticks together, destroys because temperature is too high, lubrication is not smooth
Phenomenon, in the utility model embodiment due to lubricating oil can the self-loopa between axis body chamber and key connection region, therefore
Scalable power transmission shaft, which has been effectively ensured, can carry out the flexible of upper frequency and larger stroke, suitable for during transmitting moment of torsion
Stretching frequency and the larger operating mode occasion of stroke.
Brief description of the drawings
Fig. 1 is a kind of structure chart for scalable power transmission shaft that the utility model embodiment provides；
Fig. 2 is a kind of structural representation for slide-and-guide bearing that the utility model embodiment provides；
Fig. 3 is the structural representation for another slide-and-guide bearing that the utility model embodiment provides.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
As shown in figure 1, the utility model embodiment provides a kind of scalable power transmission shaft, including：Axis body 1 and it is socketed on axis body
1 external member 2, axis body 1 and external member 2 are by key connection (not shown), so that axis body can be rotated together and relatively with external member
Slide；Chamber 11 is provided with axis body 1, is used to store lubricating oil in chamber 11, through hole 12 is provided with the side wall of chamber 11, is led to
Hole 12 is communicated in the key connection region 3 between axis body 1 and external member 2, two be located between axis body 1 and external member 2 outside key connection region 3
Side position mutually seals；Axis body 1 is used to connect first component (not shown), and external member 2 (is not shown for connecting second component in figure
Go out), so as to pass through axis body 1 and the key connection passing power of external member 2 between first component and second component.
Wherein, axis body 1 and the key connection of external member 2 realize between axis body 1 and external member 2 it is circumferentially fixed with transmit move and turn
Square, specifically, key can be fixedly installed on the outer wall of axis body 1, keyway is set on the inwall of external member 2；Key connection includes loose key
Connection, tight key connection connect three major types with spline, and loose key connection key used has general flat key, woodruff key, dive key and cunning
Key etc., torque is transmitted by the side of key；Tight key connection is referred mainly to using wedge key, and the upper and lower surface of key is all working face；Flower
Key teeth side is working face, and torque is transmitted by the extruding of key teeth side.
In the chamber 11 of axis body 1 after deposit lubricating oil, lubricating oil flow to key connection region 3 by through hole 12, make axis body 1 with
Coupling part lubrication between external member 2 so that when axis body 1 slides relative to external member 2, frictional force is reduced, due to key connection area
Be tightly connected between the axis body 1 and external member 2 of both sides opening position outside domain 3, thus the lubricating oil in key connection region 3 will not flow out to
It is outside.
Illustrate the utility model embodiment below by the operation principle of scalable power transmission shaft, when first component connecting shaft
Body 1, during second component connectivity kit 2, first component and second component are by axis body 1 and the key connection passing power of external member 2, and the
One part and second component it is close to each other during transmitting moment of torsion or away from when, axis body 1 produces Relative sliding with body 2, by
Deposit lubricating oil in the chamber 11 of axis body 1, makes lubricating oil flow to key connection region 3 by through hole 12, reduces axis body 1 and external member 2
Between frictional force, axis body 1 and external member 2 are reduced with respect to heat caused by sliding friction, in axis body 1 and the Relative sliding of external member 2
During, lubricating oil self-loopa between chamber 11 and key connection region 3, make the sufficient lubrication of key connection region 3, so that axis body 1
Relative sliding is smooth between external member 2, and then realizes that first component transmits moment of torsion with second component by scalable power transmission shaft
During carry out axial direction relative movement when, scalable power transmission shaft can smoothly stretch.
The scalable power transmission shaft that the utility model embodiment provides, its axis body, by key connection, make axis body and set with external member
Part transmit moment of torsion simultaneously can Relative sliding, by being stored in lubricating oil in the chamber of axis body, lubricating oil flow to axle by through hole
Key connection region between body and external member, sufficient lubrication key connection region so that when Relative sliding between axis body and external member, profit
Lubricating oil reduces kinetic force of friction, reduces temperature caused by friction, so that axis body and the smooth Relative sliding of external member, you can flexible transmission
Axle is smoothed out stretching, avoid power transmission shaft in the prior art sticked together because temperature is too high, lubrication is not smooth, showing of destroying
As, in the utility model embodiment due to lubricating oil can the self-loopa between axis body chamber and key connection region, therefore effectively
It ensure that scalable power transmission shaft can carry out the flexible of upper frequency and larger stroke, stretched suitable for transmitting during moment of torsion
Frequency and the larger operating mode occasion of stroke.
Specifically, external member 2 includes sleeve pipe 21 and is sealedly attached to the support components support 22 at the both ends of sleeve pipe 21, sleeve pipe 21 respectively
Axis body 1 is socketed on by key connection, the sealing of support components support 22 with axis body 1；Support components support 22 includes slide-and-guide bearing 221, sliding
Action-oriented bearing 221 includes the support guide frame 2211 for setting and being in contact with axis body 1 around axis body 1.Wherein, the He of sleeve pipe 21
Slide-and-guide bearing 221 is set on axis body 1, and slide-and-guide bearing 221 comprises at least two, is respectively arranged at the two of sleeve pipe 21
End, the support guide frame 2211 of slide-and-guide bearing 221 are contacted with axis body 1, and support and guide effect are played to axis body 1, works as axle
When body 1 is relative to 21 Relative sliding of sleeve pipe, support guide frame 2211 contributes to the smooth sliding of axis body 1, with reference in chamber 11
Lubricating oil to the sufficient lubrication of key connection region 3 between axis body 1 and external member 2, more effectively realize that scalable power transmission shaft is passing
Stretching for higher frequency and bigger stroke is carried out during torque delivery.
Specifically, the sealing of support components support 22 is socketed on axis body 1 and can realized by certain structure on slide-and-guide bearing 221,
But be unfavorable for the design and installation of slide-and-guide bearing 221, therefore in order to preferably rationally design slide-and-guide bearing 221 with
And the sealing between guarantee support components support 22 and axis body 1, it is designed as：Support components support 22 also includes end cap 222, slide-and-guide axle
Hold 221 ends that sleeve pipe 21 is anchored on by end cap 222, sealed between slide-and-guide bearing 221 and sleeve pipe 21, end cap 222 with
Sealed between axis body 1.End cap 222 is respectively arranged at the end of the slide-and-guide bearing 221 at the both ends of sleeve pipe 21, passes through end cap 222
Slide-and-guide bearing 221 is fastened on to the both ends of sleeve pipe 21, it is easy for installation, between slide-and-guide bearing 221 and axis body 1
Support, guide effect need to be considered, the sealing between end cap 222 and axis body 1 is easier to design, and end cap 222 plays fixed slip and led
Effect to bearing 221 and the work for preventing power transmission shaft internal lubrication oil stream from going out and preventing external dust etc. from entering in power transmission shaft
With.It can be sealed between slide-and-guide bearing 221 and sleeve pipe 21 by sealing ring.
The embodiment of support guide frame 2211 may include as follows：
Specifically, a kind of embodiment is：With reference to Fig. 1 and Fig. 2, slide-and-guide bearing 221 include fixed cover 2212 and
First collar being fixed on the inwall of fixed cover 2212, fixed cover are fixedly connected on the end of sleeve pipe 21, and first collar is support
Guide frame 2211, oil-recovery tank 2213 is provided with the inwall of first collar, and oil-recovery tank 2213 surrounds the inwall edge of first collar
Axial direction spiral is set.Wherein, the inwall of first collar (i.e. support guide frame 2211) can use nylon or copper alloy etc.
Beneficial to the material for making axis body 1 smoothly slide, or the roller structure in axial direction rolled can be also designed with, first collar is (i.e.
Support guide frame 2211) in axial direction spiral is set for oil-recovery tank 2213 on inwall so that axis body 1 is flow to out of chamber 11
Lubricating oil between external member 2 is flowed into oil-recovery tank 2213, between lubrication slide-and-guide bearing 221 and axis body 1, beneficial to axis body 1
Smoothly slided relative to first collar (i.e. support guide frame 2211).
Specifically, another embodiment is：With reference to Fig. 1 and Fig. 3, slide-and-guide bearing 221 include fixed cover 2212 with
And second collar of the inwall of fixed cover 2212 is slidably connected to, fixed cover 2212 is fixedly connected on the end of sleeve pipe 21, second set
Ring is fixedly sheathed in axis body 1, and second collar is support guide frame 2211.Fixed cover 2212 can be designed (to hold with second collar
Support guide frame 2211) between smoothly slide relatively, axis body 1 is fixedly connected with second collar (i.e. support guide frame 2211),
So that axis body 1 smoothly slides together with second collar (i.e. support guide frame 2211) relative to fixed cover 2212.
Specifically, one end of chamber 11 is through the end face of axis body 1, and the other end of chamber 11 is plugged in axis body 1, chamber
One end of room 11 is blocked by piston component 4, and piston component 4 includes the piston bush 41 of both ends connection and is sealed in piston bush 41
Piston core 42, one end of piston bush 41 and chamber 11 is tightly connected.One end of chamber 11 is blocked using piston component 4, wherein,
The fixed seal connection of piston bush 41 is in one end of chamber 11, and piston core 42 is in piston bush 41 by between the two-port of piston bush 41
Path block, when the lubricating oil in chamber 11 expands with heat and contract with cold phenomenon, the piston core 42 of piston component 4 is with lubricating oil
Expansion or shrinkage be axially moveable accordingly in piston bush 41, play pressure release or ftercompction effect, to ensure in chamber 11
The normal self-loopa work of lubricating oil, while avoid axis body from being damaged because lubricating oil expands.
Specifically, piston core 42 is connected to the centre position in piston bush 41 by elastomeric element 43, wherein, elastomeric element
43 include the Part I of one end to one end of piston core 42 out of piston bush 41, and out of piston bush 41 the other end to piston core
The Part II of 42 other ends.Wherein, elastomeric element 43 can use spring, and when scalable power transmission shaft produces vibration, spring can
Reduce vibration influences on position of the piston core 42 in piston bush 41.
Piston bush 41 is sealedly attached to the inside of the one end of chamber 11.Piston bush 41 is tightly connected with one end of chamber 11
When, piston bush 41 is stretched into chamber 11 and be attached, can avoid hindering when there is one end that miscellaneous part is socketed on axis body 1 and connect
Connect.
Specifically, through hole 12 includes the first through hole 121 of two avris positioned at key connection region 3, and first through hole 121 is located at
Between position and key connection region 3 that axis body 1 seals with the phase of external member 2；Through hole 12 also includes second in key connection region 3
Through hole 122, the aperture of the second through hole 122 are less than the aperture of first through hole 121.First through hole 121 is adjacent with key connection region 3,
First through hole 121 is designed as larger hole so that the lubricating oil in chamber 11 quickly through hole first through hole 121 can flow into axis body
Between 1 and external member 2, lubricating oil sets in key connection region 3 the by flowing to key connection region 3 after first through hole 121
Two through holes 122, the second through hole 122 are designed as less hole so that do not influence the lubricating oil energy in chamber on the premise of key connection
Key connection region 3, axis body 1 and sufficient lubrication during the Relative sliding of external member 2 are enough flow to by the second through hole 122.
Specifically, first through hole 121 is uniformly arranged multiple for 1 one weeks around axis body；The quantity of second through hole 122 includes more
Individual, axial direction of multiple second through holes 122 along axis body 1 is uniform between the first through hole 121 of the 3 liang of avris in key connection region
Arrangement.Multiple first through hole 121 are set to be favorably improved the adequacy lubricated between axis body 1 and external member 2 within 1 one weeks around axis body,
Multiple second through holes 122 help to make lubricating oil fast lubricant key connection region 3, better ensure that between axis body 1 and external member 2
Relative sliding is smooth.
Specifically, axis body 1 is connected with external member 2 by spline.Axis body 1 is generally designed as external splines, external member 2 is designed as interior
Spline, spline are adapted to centering precision to require high, transmit the connection that torque is big, often slides, therefore are more excellent using spline connection
Choosing is then.
One end of external member 2 is connected with the first joint 51, wherein, one end of external member 2 and one end of axis body 1 are same direction,
The other end of axis body 1 is connected with the second joint 52.Wherein, the first joint 51 is used to connect second component, and the second joint 52 is used for
First component is connected, to realize between first component and second component by key connection passing power；When the first joint and second
Joint distinguishes universal-joint or the first joint and the second joint when being respectively universal joint, should as scalable universal drive shaft
The operating mode occasion larger for stretching frequency and stroke.
The scalable power transmission shaft that the utility model embodiment provides, its axis body, by key connection, make axis body and set with external member
Part transmit moment of torsion simultaneously can Relative sliding, by being stored in lubricating oil in the chamber of axis body, lubricating oil flow to axle by through hole
Key connection region between body and external member, sufficient lubrication key connection region so that when Relative sliding between axis body and external member, profit
Lubricating oil reduces kinetic force of friction, reduces temperature caused by friction, so that axis body and the smooth Relative sliding of external member, you can flexible transmission
Axle is smoothed out stretching, avoid power transmission shaft in the prior art sticked together because temperature is too high, lubrication is not smooth, showing of destroying
As, in the utility model embodiment due to lubricating oil can the self-loopa between axis body chamber and key connection region, therefore effectively
It ensure that scalable power transmission shaft can carry out the flexible of upper frequency and larger stroke, stretched suitable for transmitting during moment of torsion
Frequency and the larger operating mode occasion of stroke.
It is described above, only it is preferred embodiment of the present utility model, not the utility model is made any formal
Limitation, any simple modification, equivalent change and modification made to above example according to the technical essence of the utility model,
In the range of still falling within technical solutions of the utility model.
Claims (10)
- A kind of 1. scalable power transmission shaft, it is characterised in that including：Axis body and the external member for being socketed on the axis body, the axis body and the external member are by key connection, so that the axis body and institute Stating external member can together rotate and slide relatively；Chamber is provided with the axis body, is used to store lubricating oil in the chamber, through hole is provided with the side wall of the chamber, The through hole is communicated in the key connection region between the axis body and the external member, and key is located between the axis body and the external member Two side positions outside join domain mutually seal；The axis body is used to connect first component, and the external member is used to connect second component so that the first component with it is described Pass through the axis body and the key connection passing power of the external member between second component.
- 2. scalable power transmission shaft according to claim 1, it is characterised in thatThe external member includes sleeve pipe and is sealedly attached to the support components support at described sleeve pipe both ends respectively, described sleeve pipe and the axle Body is socketed on the axis body by key connection, the support components support sealing；The support components support includes slide-and-guide bearing, the slide-and-guide bearing include setting around the axis body and with it is described The support guide frame that axis body is in contact.
- 3. scalable power transmission shaft according to claim 2, it is characterised in thatThe support components support also includes end cap, and the slide-and-guide bearing is anchored on the end of described sleeve pipe by the end cap, Seal between the slide-and-guide bearing and described sleeve pipe, sealed between the end cap and the axis body.
- 4. scalable power transmission shaft according to claim 3, it is characterised in thatThe slide-and-guide bearing includes fixed cover and first collar being fixed on the fixed cover inwall, the fixed cover It is fixedly connected on the end of described sleeve pipe, first collar is the support guide frame, on the inwall of first collar Oil-recovery tank is provided with, in axial direction spiral is set the oil-recovery tank around the inwall of first collar.
- 5. scalable power transmission shaft according to claim 3, it is characterised in thatThe slide-and-guide bearing includes fixed cover and is slidably connected to second collar of the fixed cover inwall, the fixation Set is fixedly connected on the end of described sleeve pipe, and second collar is fixedly sheathed in the axis body, and second collar is described Support guide frame.
- 6. scalable power transmission shaft according to claim 1, it is characterised in thatOne end of the chamber is through the end face of the axis body, and the other end of the chamber is plugged in the axis body, institute The one end for stating chamber is blocked by piston component, and the piston component includes the piston bush of both ends connection and is sealed in the piston Piston core in set, one end of the piston bush and the chamber are tightly connected.
- 7. scalable power transmission shaft according to claim 6, it is characterised in thatThe piston core is connected to the centre position in the piston bush by elastomeric element, wherein, the elastomeric element includes The Part I of one end to described piston core one end out of described piston bush, and out of described piston bush the other end to the work Fill in the Part II of the core other end；The piston bush is sealedly attached to the inside of the chamber.
- 8. scalable power transmission shaft according to claim 1, it is characterised in thatThe through hole includes the first through hole of two avris positioned at the key connection region, and the first through hole is located at the axis body Between the position and the key connection region that are mutually sealed with the external member；The through hole also includes the second through hole in the key connection region, and the aperture of second through hole is less than described the The aperture of one through hole.
- 9. scalable power transmission shaft according to claim 8, it is characterised in thatThe first through hole is uniformly arranged multiple for one week around the axis body；The quantity of second through hole is including multiple, and axial direction of multiple second through holes along the axis body is in the key It is evenly distributed between the first through hole of the avris of join domain two.
- 10. scalable power transmission shaft as claimed in any of claims 1 to 9, it is characterised in thatThe axis body is connected with the external member by spline；One end of the external member is connected with the first joint, wherein, one end of the external member and one end of the axis body are same side To the other end of the axis body is connected with the second joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720524351.1U CN206830632U (en) | 2017-05-11 | 2017-05-11 | Scalable power transmission shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720524351.1U CN206830632U (en) | 2017-05-11 | 2017-05-11 | Scalable power transmission shaft |
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| Publication Number | Publication Date |
|---|---|
| CN206830632U true CN206830632U (en) | 2018-01-02 |
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ID=60770790
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720524351.1U Active CN206830632U (en) | 2017-05-11 | 2017-05-11 | Scalable power transmission shaft |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949138A (en) * | 2017-05-11 | 2017-07-14 | 北京博科测试系统股份有限公司 | Scalable power transmission shaft |
| CN115163646A (en) * | 2022-07-12 | 2022-10-11 | 西南石油大学 | Stepless telescopic sealing shaft capable of simultaneously transmitting torque and bit pressure |
-
2017
- 2017-05-11 CN CN201720524351.1U patent/CN206830632U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949138A (en) * | 2017-05-11 | 2017-07-14 | 北京博科测试系统股份有限公司 | Scalable power transmission shaft |
| CN106949138B (en) * | 2017-05-11 | 2023-09-05 | 北京博科测试系统股份有限公司 | Telescopic transmission shaft |
| CN115163646A (en) * | 2022-07-12 | 2022-10-11 | 西南石油大学 | Stepless telescopic sealing shaft capable of simultaneously transmitting torque and bit pressure |
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