CN108980286A - Needle tooth cycloidal reducer, transmission roller and bearing - Google Patents
Needle tooth cycloidal reducer, transmission roller and bearing Download PDFInfo
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- CN108980286A CN108980286A CN201811150571.8A CN201811150571A CN108980286A CN 108980286 A CN108980286 A CN 108980286A CN 201811150571 A CN201811150571 A CN 201811150571A CN 108980286 A CN108980286 A CN 108980286A
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- hollow rollers
- support
- support column
- hollow
- rollers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/34—Rollers; Needles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H2057/085—Bearings for orbital gears
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
The present invention provides a kind of needle tooth cycloidal reducer, transmission roller and bearing.Needle tooth cycloidal reducer includes cycloid disc, the pin wheel housing being surrounded on the outside of cycloid disc and the transmission component being clamped between cycloid disc and pin wheel housing, the transmission component includes several along the equally distributed transmission roller in pin wheel housing inside circumference direction, the at least partly described transmission roller is set as the support construction for including hollow rollers and being equipped with hollow rollers, the support construction includes the support column protruded on the inside of hollow rollers, the flying height that flexible deformation occurs for hollow rollers is provided between the inner wall of the hollow rollers and the outside wall surface of support column, the support construction whole installation are as follows: when needle tooth cycloidal reducer work, in radial directions, the at least partly structure of the support column is remained to align with the both ends end of hollow rollers, to keep the resilient support to hollow rollers both ends end.
Description
Technical field
The present invention relates to retarder technical field more particularly to it is a kind of have both flexible and intensity needle tooth cycloidal reducer,
It is driven roller, the bearing with the transmission roller.
Background technique
Transmission roller, traditional biography are often used in machinery field, the transmission devices such as needle tooth cycloidal reducer, bearing
Dynamic roller is solid roller, and the use environment of transmission device more dislikes summary, overload problems, therefore solid roller may often occurs
Also it will receive unnecessary extra load, increase abrasion singularly, or even can be destroyed.This is also that current transmission device compares
Generally existing common fault.The new machine precision just assembled is good, and using soon, precision is substantially reduced, and lubricating oil blacks rapidly, essence
It is too short to spend the retention time, this is far from meeting the requirements.
To solve this awkward situation, the major measure that the country is taken at present is to further increase machining accuracy and assembly essence
Degree, strives for drawing close to import is original-pack comprehensively.And proposing high-precision major measure is using more advanced, the mainly processing of import
Equipment.But facts proved that purpose can not be fully achieved merely by doing so, and thus bring production cost is expensive, also makes one
Suspecting can really be commercialized in the future, to reach the ability with external product competition.
In addition, also it has been proposed that introduce flexible hollow rollers in transmission device instead of traditional solid roller,
It is made up by elastic compensating due to mismachining tolerance, the reasons such as service wear cause bad problem.It was verified that hollow rollers exist
Deformation retract can be omited when pressure-bearing, so that not reason mismachining tolerance or assembly inaccuracy be made between the component of transmission device to cause excessively
Interference fit, or cross wide arc gap caused by making to wear and compensated；Therefore elastic compensating can reduce wanting for machining accuracy really
It asks, reduces abrasion, it will be apparent that extend the service life of transmission device, keep precision.
However, it is contemplated that the possible very severe of the operating condition of transmission device, often there is situations such as overload is impacted, and
And found by practice, as shown in Figure 1, end can deform when there is pressure P to act on hollow rollers end.Specifically
The tube wall on ground, end can be recessed inwardly under the action of pressure P, and such as CDE is surrounded in figure a pit is formed around.
This pit is most deep at port, and most shallow at farthest D at port, if pressure is excessive, in hollow rollers port
It is easy to appear fracture phenomenas at position, and the crackle after rupture will continue to extend to centre in the subsequent use process, in turn
Hollow rollers are caused to fail.
Therefore, it is necessary to provide a kind of improved needle tooth cycloidal reducer to overcome the above problem.
Summary of the invention
Flexible and intensity transmission roller is had both, with the needle tooth of the transmission roller the purpose of the present invention is to provide a kind of
Cycloidal reducer and bearing.
For achieving the above object, the present invention provides a kind of needle tooth cycloidal reducer, including cycloid disc, it is surrounded on pendulum
Pin wheel housing on the outside of drum and the transmission component being clamped between cycloid disc and pin wheel housing, the transmission component includes several along needle
The equally distributed transmission roller in tooth shell inside circumference direction, at least partly described transmission roller be set as include hollow rollers and with
The support construction that hollow rollers are equipped with, the support construction include the support column protruded on the inside of hollow rollers, the sky
The flying height that flexible deformation occurs for hollow rollers is provided between the inner wall of heart roller and the outside wall surface of support column, it is described
Support construction whole installation are as follows: when needle tooth cycloidal reducer work, in radial directions, at least portion of the support column
Separation structure is remained to align with the both ends end of hollow rollers, to keep the resilient support to hollow rollers both ends end.
As a further improvement of the present invention, the overall length of the support column is not less than the overall length of the hollow rollers, so that
The support of support column integrally can be obtained in the hollow rollers.
As a further improvement of the present invention, the support construction further includes connecting the nut cap of the support column, the lid
Cap is located on the outside of the hollow rollers end, and has and be directly connected to support column and towards the blocking surface of hollow rollers, institute
The outer diameter for stating blocking surface is greater than the internal diameter of the hollow rollers.
As a further improvement of the present invention, the maximum outside diameter of the nut cap is not more than the outer diameter of the hollow rollers.
As a further improvement of the present invention, the support column includes a pair of of support pole unit, and each support pole unit connects
The nut cap is connect, a pair of support pole unit protrudes into hollow rollers in opposite directions from the both ends of the hollow rollers, and
And axially adjacent setting, a pair of nut cap are located on the outside of the both ends of hollow rollers.
As a further improvement of the present invention, the length of each support pole unit is the half of hollow rollers overall length.
As a further improvement of the present invention, the difference between the internal diameter of the hollow rollers and support column outer diameter is hollow
0.005 to 0.015 times of roller outer diameter.
As a further improvement of the present invention, the hollow rollers are close around formation by steel band or steel wire spiral, described hollow
When roller both ends distributed along its axial direction are squeezed, the length of the hollow rollers is constant.
For achieving the above object, the present invention also provides a kind of transmission rollers, are used for transmission device, the transmission rolling
Column includes hollow rollers and the support construction that is equipped with hollow rollers, and the support construction includes protruding into hollow rollers
The support column of side is provided between the inner wall of the hollow rollers and the outside wall surface of support column and elasticity change occurs for hollow rollers
The flying height of shape, the support construction whole installation are as follows: it is being driven work always, in radial directions, the support column
At least partly structure remain and align with the both ends end of hollow rollers, to keep the bullet to hollow rollers both ends end
Property support.
As a further improvement of the present invention, the overall length of the support column is not less than the overall length of the hollow rollers, so that
The support of support column integrally can be obtained in the hollow rollers.
As a further improvement of the present invention, the support construction further includes connecting the nut cap of the support column, the lid
Cap is located on the outside of the hollow rollers end, and has the blocking surface towards hollow rollers, and the outer diameter of the blocking surface is greater than
The internal diameter of the hollow rollers.
As a further improvement of the present invention, the maximum outside diameter of the nut cap is not more than the outer diameter of the hollow rollers.
As a further improvement of the present invention, the support column includes a pair of of support pole unit, and each support pole unit connects
The nut cap is connect, a pair of support pole unit protrudes into hollow rollers in opposite directions from the both ends of the hollow rollers, and
And axially adjacent setting, a pair of nut cap are located on the outside of the both ends of hollow rollers.
As a further improvement of the present invention, the length of each support pole unit is the half of hollow rollers overall length.
As a further improvement of the present invention, the difference between the internal diameter of the hollow rollers and support column outer diameter is hollow
0.005 to 0.015 times of roller outer diameter.
As a further improvement of the present invention, the hollow rollers are close around formation by steel band or steel wire spiral, described hollow
When roller both ends distributed along its axial direction are squeezed, the length of the hollow rollers is constant.
For achieving the above object, the present invention also provides a kind of bearing, the bearing includes spaced outer shaft
Carrier ring, inner bearing collar, several transmission rollers for being set between outer collar bearing and inner bearing collar and being uniformly arranged, the transmission rolling
Column is driven roller setting as the aforementioned.
The beneficial effects of the present invention are: needle tooth cycloidal reducer of the invention, by the way that support column is arranged in hollow rollers,
And make support column in the course of work of needle tooth cycloidal reducer, at least partly structure can be remained to hollow rollers
The resilient support of both ends end, the end that hollow rollers thus can be made to be easy to appear problem obtain effective elasticity guarantee and intensity
It ensures, improves service life.
Detailed description of the invention
Fig. 1 is a kind of existing hollow rollers schematic diagram that end deforms when being pressurized；
Fig. 2 is the schematic cross-sectional view of first preferred embodiment of needle tooth cycloidal reducer of the present invention；
Fig. 3 is the enlarged drawing that position is irised out in Fig. 2；
Fig. 4 is the axial schematic cross-sectional view that roller is driven in Fig. 2；
Fig. 5 is the schematic cross-sectional view that the another preferred embodiment of roller is driven in the present invention；
Fig. 6 is the schematic cross-sectional view that the another embodiment of roller is driven in the present invention；
Fig. 7 is the transverse sectional view of the second preferred embodiment of needle tooth cycloidal reducer in the present invention；
Fig. 8 is the schematic cross-sectional view of middle (center) bearing of the present invention.
Specific embodiment
Hereinafter, the present invention will be described in detail with reference to various embodiments shown in the accompanying drawings.But these embodiments are not
The limitation present invention, structure that those skilled in the art are made according to these embodiments, method or change functionally
It changes and is included within the scope of protection of the present invention.
The transmission device that needle tooth cycloidal reducer has been widely used as industrial robot at present is applied, and is especially subtracted with RV type
Fast device is that the needle tooth cycloidal reducer of representative is compact-sized with its, transmission capacity is strong, becomes the most important component of robot system.
The better embodiment of needle tooth cycloidal reducer 100 in the present invention is shown to Fig. 8 referring to figure 2..The needle tooth
Cycloidal reducer 100 includes being located at centre to connect the input shaft (not shown) of servomotor (not shown), be integrally formed in
The input gear (not shown) for inputting shaft end, the planetary gear (not shown) and planet being engaged in around input gear
Cycloid disc 2 that the gear crank axle 1 mutually fixed and crank axle 1 are equipped with is equipped between crank axle 1 and cycloid disc 2
Bearing 3, pin wheel housing 4, the transmission component 5 being clamped between cycloid disc 2 and pin wheel housing 4 and match setting with cycloid disc 2
Output element 6.The perforation 21 for accommodating the crank axle 1 and bearing 3 is provided on the cycloid disc 2.
Wherein, referring to figure 2. and shown in Fig. 3, the transmission component 5 includes several equal along 4 inside circumference direction of pin wheel housing
The transmission roller 51 of even distribution.At least partly described transmission roller 51 is set as including hollow rollers 52 and match with hollow rollers 52
Close the support construction 53 of setting.The support construction 53 includes the support column 531 for protruding into 52 inside of hollow rollers.It is described hollow
The flying height that flexible deformation occurs for hollow rollers 52 is provided between the inner wall of roller 52 and the outside wall surface of support column 531
54.When the needle tooth cycloidal reducer 100 work, in radial directions, at least partly structure of support column 531 is protected always
It holds and aligns with the both ends end of hollow rollers 52, and then remain the resilient support to 52 both ends end of hollow rollers.
Above-mentioned meaning " resilient support ", refers to that branch can be passed through when appropriate flexible deformation occurs for hollow rollers 52
Dagger 531 provides the strength support of auxiliary to hollow rollers 52, on the basis of guaranteeing that hollow rollers 52 have sufficiently resilient, by force
Degree can also be ensured；I.e. support column 531 carries out the backup support guarantee to 52 both ends end of hollow rollers always.
As shown in Fig. 2, all transmission rollers 51 are disposed as in the present embodiment as the first preferred embodiment of the invention
Including the hollow rollers 52 and the support construction 53.It certainly, can also be as shown in fig. 7, only section transmission roller 51 be arranged
Being includes the hollow rollers 52 and the support construction 53, and other transmission rollers 51 are that conventional solid roller structure is set
It sets, and aforementioned two kinds of transmission rollers 51 is arranged in a staggered manner, as long as can guarantee to reach related needs, energy in transmission 51 precision of roller
It is enough that effectively transmission is realized in required time, and there is enough bufferings.
Fig. 3 is the enlarged drawing that part is irised out in Fig. 2, clear in order to illustrate, is rolled in Ben Tu and the present invention in relation to transmission
The deformation part of column 51, which is all exaggerated, to be showed schematically out.Wherein, flying height 54 in the transmission roller 51 in Fig. 3 at B
For normal condition, hollow rollers 52 are worked normally；Elastic change is carried out after hollow rollers 52 are squeezed at A at flying height 54
Shape.In normal operation, transmission roller 51 is by the reasonable pressure from pin wheel housing 4 and cycloid disc 2, either
Hollow rollers 52 at A or at B can normally work.
And when there is powerful overload impact in the external world, which can greatly increase, and for example reach five times of normal value
When above, hollow rollers 52 may be made excessively to deform, especially the end of hollow rollers 52, because its bearing capacity compares centre
Position is weaker, to be easily broken；And at this point, hollow rollers 52 be extruded and be pressed onto directly recline support column 531 when, can lead to
Powerful overload impact is resisted in the effective support for crossing support column 531, be effectively prevented from hollow rollers 52 be excessively squeezed and deformed and
Damage.That is, in the very powerful shock loading of extraneous application, if it can guarantee the Auxiliary support for having support column 531, and
Support column 531 can be propped up and is strong enough to support, and hollow rollers 52 just will not be destroyed, and entire transmission roller 51 also can be safety and sound.
Preferably, hollow rollers 52 and support column 531 use wear-resisting and have high strength steel or macromolecule carbon in the present invention
Fibrous material is made.Further, for the setting of the flying height 54, setting is too much to be easy to cause 52 mistake of hollow rollers
Divide deformation and is destroyed, effect that is too small and not having compensation.It is set as after largely calculating, testing and testing, it is described
Difference (i.e. the size of flying height 54) between 531 outer diameter of internal diameter and support column of hollow rollers 52 is 52 outer diameter of hollow rollers
0.005 to 0.015 times.
Further, in the present invention, as above-mentioned, the needs of support column 531 are remained to 52 both ends of hollow rollers
The resilient support of end sets the overall length of the support column 531 to not less than described as a preferred embodiment of the invention
The overall length of hollow rollers 52, so that the whole support that support column 531 can be obtained of the hollow rollers 52.It certainly, can also be by institute
It states support column 531 and is set as multisection type, overall length can be slightly shorter than the overall length of the hollow rollers 52, as long as guaranteeing hollow rollers 52
Both ends end and both ends adjacent position can be flexibly supported effectively.
Preferably, as shown in figure 4, being so that the resilient support of both ends end is guaranteed, heretofore described support is tied
Structure 53 is set as further including the nut cap 532 for connecting the support column 531.The nut cap 532 is located at 52 end of hollow rollers
Outside, and have and be directly connected to support column 531 and towards the blocking surface of hollow rollers 52 5321, the blocking surface 5321
Outer diameter is greater than the internal diameter of the hollow rollers 52.Furthermore it is preferred that being between 52 end face of the blocking surface 5321 and hollow rollers
Smooth contact surfaces reduce friction between the two.
In present embodiment, the support column 531 includes a pair of of support pole unit 5311, and each support pole unit 5311 connects
Connect the nut cap 532.It include two support lists being made of respectively a nut cap 532 and a support pole unit 5311
Member, two support units are oppositely arranged, so that the both ends of two support pole unit 5311 from the hollow rollers 52 are opposite
It protrudes into hollow rollers 52, and axially adjacent setting, and a pair of nut cap 532 is located at the two of hollow rollers 52
End outside.
In that case, the overall length of two support pole units 5311 may be configured as close or equal to the hollow rollers 52
Overall length.
Preferably, identical structure snd size are set by two support units, so facilitates installation, without specially knowing
Not.In that case, wherein the nut cap 532 of a support unit is supported in the lower section of hollow rollers 52, hollow rollers 52 are relied on
Its gravity is connected to downwards on the blocking surface 5321 of nut cap 532；And it is axially located in the nut cap 532 of another support unit of top
The upper end of hollow rollers 52 is overlapped on by its own gravity, so that the support column list being separately connected with two nut caps 532
Member 5311 directly can form resilient support to 52 both ends end of hollow rollers and both ends adjacent position, and guarantee this kind of elasticity
Support is lasting to be carried out, and the rupture at 52 end position of hollow rollers is avoided.In addition, the outer diameter of the nut cap 532 is greater than support column
531 outer diameter keeps its position so that support column 531 also can be supported effectively；In addition, the nut cap 532 may be used also simultaneously
Prevent foreign matter from entering flying height 54.
In the identical setting of two support units, the length of each support pole unit 5311 is set as 52 length of hollow rollers
Half.Certainly, the length of each support pole unit 5311 can also be set to the length of slightly shorter than 52 half of hollow rollers, made
It obtains 52 middle position of hollow rollers slightly part and does not obtain elastic Auxiliary support, also may achieve the purpose of the present invention.
As another preferred embodiment of the invention, the support pole unit 5311 of above-mentioned two support unit can also be arranged
For different length, as long as meeting the overall length that its overall length is close or equal to the hollow rollers 52.
As another embodiment of the invention, in the support construction 53, one can be set by support column 531,
Its length is not less than the length of hollow rollers 52.In that case, the nut cap 532 of 531 one end of support column can be set to
Support column 531 is integrally formed, and the nut cap 532 of the other end is then set as being fixed using screw thread with 531 other end of support column
The nut structure of connection.Certainly, the nut cap at 531 both ends of support column can also be disposed as with 531 both ends of support column using screw thread
The nut structure of connection, equally also may achieve the purpose of the present invention.
Further, the maximum outside diameter of the nut cap 532 is not more than the outer diameter of the hollow rollers 52.So it will not influence
The transmission work of entire transmission roller 51, and transmission roller 51 in the present invention can be made to be suitable for all existing transmission devices,
The transmission device includes conventional needle tooth cycloidal reducer；To which the invention further relates to a kind of using structure setting as above
It is driven roller 51.
In addition, heretofore described nut cap 532 is arranged smaller as far as possible along the axial thickness of hollow rollers 52, guarantee hollow
Effective drive length of roller 52.
In addition, please referring to shown in Fig. 5 and Fig. 6, as other preferred embodiments of the invention, the hollow rollers 52 '
Can be by steel band 521 ' or steel wire 521 " spiral is close around formation, " close to twine around " referring to steel band 521 ' or steel wire 521 " seamless spiral
Around when the hollow rollers 52 ' both ends distributed along its axial direction are squeezed, the length of the hollow rollers 52 ' is constant.It should
The support construction 53 ' that hollow rollers 52 ' are above equipped with is subsequent to repeat no more with above-mentioned setting.
The hollow rollers 52 ' in the present embodiment other than the support with above-mentioned support construction 53 ', because itself
Structure design, so that when by ambient pressure, the end of its own structure also not cracky, and even if end is damaged, make
Being split with process interrupt will not be to middle part infiltration and development, so that the service life of entire needle tooth cycloidal reducer or transmission roller
Increase.
Specifically, steel band 521 ' or steel wire 521 in the present invention are " in the close hollow rollers 52 ' around formation of spiral, when pressure is made
When for hollow rollers position in similar Fig. 1, in the present embodiment the circle or two circle steel bands 521 ' of 52 ' end of hollow rollers or
" partial elastic deformation can occur for steel wire 521.But the steel band 521 ' or steel wire 521 due to this section generation flexible deformation are " in length
Degree does not have much constraints on direction, so its is non-breakable, long service life.In addition, this kind of hollow rollers compare it is general whole
The hollow rollers of figure are able to bear bigger deformation.
The thickness and width of the steel band 521 ' is unlimited, and steel wire 521 " section can be round or abnormity, as long as energy
Pass through the compact close hollow rollers 52 ' that the rigidity needed with transmission roller 51 ' is formed by way of.
To guarantee coming into full contact with for the transmission roller 51 ' and needle tooth socket and cycloid disc, increases contact area, reduce and grind
Damage, the periphery of the hollow rollers 52 ' can be ground, to guarantee suitable outer diameter and necessary finish.It is described
The pipe thickness of hollow rollers 52 ' is between the 1/4~1/6 of the 52 ' outer diameter of hollow rollers.
It please refers to shown in Fig. 8, above-mentioned various transmission rollers 51,51 ' of the invention can be used in bearing 3.Such as it answers
For the bearing 3 between the crank axle 1 and cycloid disc 2 in needle tooth cycloidal reducer 100 of the present invention.
The bearing 3 generally includes spaced outer collar bearing 31 and inner bearing collar 32, is set to 31 and of outer collar bearing
Between inner bearing collar 32 and several rollers 33 for being uniformly arranged.In the prior art, the roller in bearing all uses solid nonelastic
Roller, such as roller part, really simultaneously participate in the quantity ratio of the roller of carrying in the prior art due to mismachining tolerance etc.
It is less, and roller is easy to be damaged, the interior outboard bearing ring in bearing is similarly such.Therefore, in present embodiment, the axis
The various embodiments that 3 roller 33 is held referring also to aforementioned drive roller 51,51 ' are arranged, in this way, which the bearing 3 can also be as above
It states 51,51 ' the said load-carry duty in part of transmission roller to be effectively ensured, avoids damaging, service life extends, while its bearing 3
The accuracy of manufacture can also be minimized.In addition, the bearing 3 in the present invention is equally applicable to other products for needing to be arranged bearing
On (not shown).
Under normal circumstances, the bearing 3 is equipped with the outer collar bearing 31 and inner bearing collar 32, to be respectively formed roller 33
Outer rollaway nest and interior rollaway nest；And bearing 3 is being applied when on needle tooth cycloidal reducer 100 of the invention, the outer collar bearing
31 and inner bearing collar 32 can also be directly made of cycloid disc 2 and crank axle 1, i.e., on cycloid disc 2 perforate 21 inner wall directly formed
Cam outer face for the outer rollaway nest, the crank axle 1 is formed as interior rollaway nest, thus may make roller 33 is held and mounted on to wear
Between 21 inner wall of hole and the cam outer face of crank axle 1, components on the one hand can be reduced, cost is reduced, on the other hand can also subtract
The superposition of small error, so that setting directly can be resilient by roller 33 to offset between cycloid disc 2 and crank axle 1 or roller 33
The foozle of itself, and make 33 supporting effect of roller preferable.
Wherein, the diameter of the roller 33 is set as slightly larger than the gap between interior rollaway nest and outer rollaway nest, so that static
Under state, the outer hollow roller 52,52 ' of roller 33 is all to be crushed slightly to be in pre-stressed state in ellipticity, squeezes and rolls inside
Between road and outer rollaway nest, a vacancy is not had, individual rollers 33 is not had in this way and destroys because of overload, while interior rollaway nest and outer
Raceway face has also obtained effective protection.
In summary it is found that needle tooth cycloidal reducer 100 of the invention, by being supported in the interior setting of hollow rollers 52,52 '
Column 531, and make support column 531 during the work time, at least partly structure can be remained to hollow rollers 52,52 '
The resilient support of both ends end, the end that hollow rollers 52,52 ' thus can be made to be easy to appear problem obtain effective elasticity and ensure
And strength protection, it improves service life.
It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book
With the other embodiments of understanding.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope bright, that they are not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention
Or change should all be included in the protection scope of the present invention.
Claims (17)
1. a kind of needle tooth cycloidal reducer, including cycloid disc, the pin wheel housing being surrounded on the outside of cycloid disc and be clamped in cycloid disc and
Transmission component between pin wheel housing, it is characterised in that: the transmission component includes several uniform along pin wheel housing inside circumference direction
The transmission roller of distribution, at least partly described transmission roller are set as the branch for including hollow rollers and being equipped with hollow rollers
Support structure, the support construction include the support column protruded on the inside of hollow rollers, the inner wall of the hollow rollers and support
The flying height that flexible deformation occurs for hollow rollers, the support construction whole installation are provided between the outside wall surface of column are as follows:
When needle tooth cycloidal reducer work, in radial directions, at least partly structure of the support column is remained and sky
The both ends end of heart roller aligns, to keep the resilient support to hollow rollers both ends end.
2. needle tooth cycloidal reducer according to claim 1, it is characterised in that: the overall length of the support column is not less than described
The overall length of hollow rollers, so that the support of support column integrally can be obtained in the hollow rollers.
3. needle tooth cycloidal reducer according to claim 1 or 2, it is characterised in that: the support construction further includes connection
The nut cap of the support column, the nut cap are located on the outside of the hollow rollers end, and have and be directly connected to simultaneously with support column
Towards the blocking surface of hollow rollers, the outer diameter of the blocking surface is greater than the internal diameter of the hollow rollers.
4. needle tooth cycloidal reducer according to claim 3, it is characterised in that: the maximum outside diameter of the nut cap is not more than institute
State the outer diameter of hollow rollers.
5. needle tooth cycloidal reducer according to claim 3, it is characterised in that: the support column includes a pair of of support column list
Member, each support pole unit connect a nut cap, and the both ends of a pair of support pole unit from the hollow rollers are opposite
It protrudes into hollow rollers, and axially adjacent setting, a pair of nut cap is located on the outside of the both ends of hollow rollers.
6. needle tooth cycloidal reducer according to claim 5, it is characterised in that: it is each it is described support pole unit length be
The half of hollow rollers overall length.
7. needle tooth cycloidal reducer according to claim 1, it is characterised in that: the internal diameter and support column of the hollow rollers
Difference between outer diameter is 0.005 to 0.015 times of hollow rollers outer diameter.
8. needle tooth cycloidal reducer according to claim 1, it is characterised in that: the hollow rollers are by steel band or steel wire spiral shell
Revolve close around formation, when the hollow rollers both ends distributed along its axial direction are squeezed, the length of the hollow rollers is constant.
9. a kind of transmission roller, be used for transmission device, it is characterised in that: the transmission roller include hollow rollers and with hollow rolling
The support construction that column is equipped with, the support construction include the support column protruded on the inside of hollow rollers, the hollow rollers
Inner wall and support column outside wall surface between be provided with the flying height that flexible deformation occurs for hollow rollers, the support is tied
Structure whole installation are as follows: transmission work always, in radial directions, at least partly structure of the support column remain with
The both ends end of hollow rollers aligns, to keep the resilient support to hollow rollers both ends end.
10. transmission roller according to claim 9, it is characterised in that: the overall length of the support column is not less than described hollow
The overall length of roller, so that the support of support column integrally can be obtained in the hollow rollers.
11. transmission roller according to claim 9 or 10, it is characterised in that: the support construction further includes described in connection
The nut cap of support column, the nut cap are located on the outside of the hollow rollers end, and have the blocking surface towards hollow rollers, institute
The outer diameter for stating blocking surface is greater than the internal diameter of the hollow rollers.
12. transmission roller according to claim 11, it is characterised in that: the maximum outside diameter of the nut cap is not more than the sky
The outer diameter of heart roller.
13. transmission roller according to claim 11, it is characterised in that: the support column includes a pair of of support pole unit,
Each support pole unit connects a nut cap, the opposite projection in both ends of a pair of support pole unit from the hollow rollers
Enter in hollow rollers, and axially adjacent setting, a pair of nut cap is located on the outside of the both ends of hollow rollers.
14. transmission roller according to claim 13, it is characterised in that: the length of each support pole unit is hollow
The half of roller overall length.
15. transmission roller according to claim 9, it is characterised in that: the internal diameter and support column outer diameter of the hollow rollers
Between difference be 0.005 to 0.015 times of hollow rollers outer diameter.
16. transmission roller according to claim 9, it is characterised in that: the hollow rollers are close by steel band or steel wire spiral
Around formation, when the hollow rollers both ends distributed along its axial direction are squeezed, the length of the hollow rollers is constant.
17. a kind of bearing, the bearing includes spaced outer collar bearing, inner bearing collar, is set to outer collar bearing and inner shaft
Between carrier ring and several transmission rollers for being uniformly arranged, it is characterised in that: the transmission roller such as claim 9~16 is any one
Transmission roller setting described in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811150571.8A CN108980286A (en) | 2018-09-29 | 2018-09-29 | Needle tooth cycloidal reducer, transmission roller and bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811150571.8A CN108980286A (en) | 2018-09-29 | 2018-09-29 | Needle tooth cycloidal reducer, transmission roller and bearing |
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| Publication Number | Publication Date |
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| CN108980286A true CN108980286A (en) | 2018-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811150571.8A Pending CN108980286A (en) | 2018-09-29 | 2018-09-29 | Needle tooth cycloidal reducer, transmission roller and bearing |
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| CN (1) | CN108980286A (en) |
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| CN108506428A (en) * | 2018-06-12 | 2018-09-07 | 昆山光腾智能机械有限公司 | It is driven roller and needle tooth cycloidal reducer, bearing with it |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE507577C (en) * | 1927-07-02 | 1930-09-22 | Robert Richard Gobereau | Roll body bearing |
| WO2009079997A2 (en) * | 2007-12-22 | 2009-07-02 | Schaeffler Kg | Rolling element comprising a hollow roller and an overload element |
| JP2015117779A (en) * | 2013-12-19 | 2015-06-25 | 株式会社ジェイテクト | Rolling bearing with pin-type retainer |
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Application publication date: 20181211 |