CN107956843A - A kind of planetary frictional drive reducing gear with self energizing effort structure - Google Patents
A kind of planetary frictional drive reducing gear with self energizing effort structure Download PDFInfo
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- CN107956843A CN107956843A CN201711429708.9A CN201711429708A CN107956843A CN 107956843 A CN107956843 A CN 107956843A CN 201711429708 A CN201711429708 A CN 201711429708A CN 107956843 A CN107956843 A CN 107956843A
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- 230000007246 mechanism Effects 0.000 claims abstract description 46
- 238000005096 rolling process Methods 0.000 claims abstract description 24
- 238000009434 installation Methods 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 5
- 230000013011 mating Effects 0.000 description 3
- 241000222712 Kinetoplastida Species 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 241000135164 Timea Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H57/082—Planet carriers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The present invention relates to a kind of planetary frictional drive reducing gear with self energizing effort structure.It includes:Including:Planetary gear speed reducing mechanism, self energizing effort mechanism, pre-tightening mechanism and housing；The housing includes：Housing A and housing B；The planetary gear speed reducing mechanism includes：Sun wheel shaft, at least two planetary gears, regulation planetary gear rotation axis and the planet carrier and outer ring, the self energizing effort mechanism of the axis that revolves round the sun include：Planet wheel spindle and output dish axle.Its number to planetary gear does not have absolute dependence；Reduce in design, manufacture and requirement to material property etc.；Remain to make after using abrasion to keep sufficiently contact between rolling element, can realize the bi-directional of power.
Description
Technical field
The present invention relates to mechanical engineering field, especially a kind of planetary frictional drive gear reducer with self energizing effort structure
Structure.
Background technology
To adapt to the development trend of motor miniature high-speed, the requirement to retarder also correspondingly improves.Compared to retarder
In widely applied gear-driven form, the vibration noise of frictional drive can reduce nearly 80%, stable drive, have excellent
High-speed drive performance.The principle of frictional drive is actually the special lubricating oil for contacting and enclosing at the place of being deformed between rolling element
It is cured at a higher pressure, using the frictional force between rolling element and oil come passing power.Generally produce normal pressure
Mode has two kinds of constant pressure pressurization and adaptive pressurization (i.e. self energizing effort).Constant pressure pressurization makes rolling element be continuously in high pressure should
Power state, easily causes the contact fatigue of rolling element and fails, and once overloads, and slipping phenomenon is also easy to produce between rolling element；It is adaptive
Answer pressurization normal pressure can be automatically adjusted according to the size of external applied load (demand torque) to avoid the generation of the former both phenomenons
Size, so as to change torque capacity, avoid skidding, can also avoid rolling pair in friction gearing from being in height for a long time
Contact stress state, improves its service life.In frictional drive retarder, the especially application in the form of planetary roller frictional drive
Relatively broad, the normal pressure of this form can obtain good balance as internal force, thus as the preferred means of frictional drive.
Patent JP5108974 propose it is a kind of using the phase place change of load condition lower planetary gear and the flexibility of outer ring come changing contact just
The structure of pressure, the number of the planetary gear of this structure have certain limitations, and due to considering that outer ring is flexible, to size design and material
Characteristic etc. will be higher requirement.Patent US7118512 proposes a kind of structure of double planetary, utilizes in the loaded state
Dual planetary gear circle center line connecting realizes self energizing effort function with respect to the angle change of planet carrier, but can only unidirectional delivery power.
The content of the invention
A kind of present invention seek to address that above problem, there is provided planetary frictional drive gear reducer with self energizing effort structure
Structure, on the one hand it is realized the self energizing effort function of friction Gear Planet Transmission by relatively simple structure, not had to the number of planetary gear
There is absolute dependence；Self energizing effort function is realized using the geometrical relationship between rigid body, is reduced in design, manufacture and to material spy
The requirement of property etc.；On the one hand after abrasion is used, due to using special conical surface planetary gear speed reducing mechanism, and have from increasing
Force mechanisms and pre-tightening mechanism, remain to make to keep sufficiently contact between rolling element, avoid normal pressure deficiency after wearing and fail, carry
High service life and security；Another further aspect can realize the bi-directional of power, disclosure satisfy that braking energy of electric automobiles
The demand of the functions such as recycling, the technical solution that it is used are as follows：
A kind of planetary frictional drive reducing gear with self energizing effort structure, it is characterised in that including:Planetary reducer
Structure, self energizing effort mechanism, pre-tightening mechanism and housing；
The housing includes：Housing A and housing B；
The planetary gear speed reducing mechanism includes：Sun wheel shaft, at least two planetary gears, regulation planetary gear rotation axis and revolution
The planet carrier of axis and outer ring, the housing A, housing B and outer ring are fixedly connected on together, the sun wheel shaft and housing into rotation
Connection, the planet carrier are connected with housing into rotation, and the planetary gear is a truncated cone-shaped roller, is had and row in the sun wheel shaft
The matched contact circular conical surface of male cone (strobilus masculinus) of star-wheel, the medial surface of the outer ring are and the male cone (strobilus masculinus) of planetary gear is matched contacts
Inner conical surface, the sun wheel shaft, planetary gear and the geometrical relationship of outer ring meet：Sun wheel shaft, outer ring, planet carrier have common axis line
Ox, the contact line between contact line, planetary gear and outer ring between the axis of all rolling elements, all rolling elements all intersects at one
Point, the rolling element refer to sun wheel shaft and planetary gear；
The self energizing effort mechanism includes：Planet wheel spindle and output dish axle, the output dish axle is connected with housing into rotation, described
Planetary gear is rotatablely connected by planet wheel spindle and planet carrier, and the output dish axle is driven by planet carrier；
Pre-tightening mechanism is used to planetary gear being pressed between sun wheel shaft and outer ring and makes to keep certain normal pressure between them
Contact.
On the basis of above-mentioned technical proposal, the pre-tightening mechanism provides a press-in using spring as compression means as planetary gear
Power between sun wheel shaft and outer ring causes planetary gear to carry out a certain amount of movement, the sun relative to sun wheel shaft and outer ring
Wheel shaft and outer ring are not moved axially with respect to housing.
On the basis of above-mentioned technical proposal, the output dish axle is connected with housing into rotation and can slide axially with respect to housing,
The right end of the planet wheel spindle is connected with output dish axle, drives output dish axle to rotate while planet wheel spindle revolves round the sun, described pre-
Tight mechanism is arranged between housing and output dish axle and provides a thrust to the left for output dish axle.
On the basis of above-mentioned technical proposal, the planetary gear is provided with the cylindrical hole of installation radial needle roller bearing along axis,
Planetary gear is provided with thrust bearing compared with large end face side, and radial bearing and thrust bearing are correspondingly provided with planet wheel spindle
Planetary gear is pressed into the sun by mounting surface, the axial force between planetary gear and planet wheel spindle by thrust bearing transmission, this axial force
Between wheel shaft and outer ring.
On the basis of above-mentioned technical proposal, the planet carrier includes preceding retainer, rear retainer and pin, is kept before described
Frame and rear retainer are bolted to connection, to install, constrain planet wheel spindle；In the hole of rear retainer installation planet wheel spindle
Expense hole on wall, and long pin hole is set in planet wheel spindle relevant position, forward and backward retainer can constrain planet wheel spindle and not occur
Rotation and allow its a small amount of axial movement.
On the basis of above-mentioned technical proposal, the planet wheel spindle tail end has the first wedge surface, first wedge surface and output
The second wedge surface in dish axle cooperates, and first wedge surface and the second wedge surface are identical ruled surface.
On the basis of above-mentioned technical proposal, in cylindrical-coordinate system (r, θ, x), surface equation should meet：
Curved surface is ruled surface, and cylindrical-coordinate system origin is taken in O points, and axis is along Ox directions, the plane of θ=0 and planet wheel spindle
Line overlaps, and l represents to make the vertical line of planet wheel spindle and the intersection point of central axis Ox to seat by intersection point of planet wheel spindle the outer end point in formula
The distance of origin is marked, k represents that main line turns over unit angle around Ox axis and takes less number along Ox to origin direction translation distance, k
Value can prevent self-locking, while also determine the relation between output torque and thrust,
So that planet wheel spindle and output the dish axle always plane-plane contact, while export dish axle and planet carrier phase difference in contact
θ has linear relationship with planet wheel spindle axial displacement.
On the basis of above-mentioned technical proposal, the pre-tightening mechanism includes anti-torsion sleeve A, anti-torsion sleeve B, preloading spring and stops
Thrust bearing, the pre-tightening mechanism are installed between output dish axle and housing B, and the anti-torsion sleeve A is with anti-sleeve B axle of turning round to slip
Connect and form rotational restraint between them, anti-torsion sleeve A and anti-torsion sleeve B play the work for preventing preloading spring from twisting
With, while in the case of loaded, limitation output dish axle axial location, preloading spring has certain precommpression when mounted
Amount, there is provided the contact normal pressure in the planetary gear speed reducing mechanism under zero load between sun wheel shaft, planetary gear and outer ring, the thrust
Bearing is installed between output dish axle and anti-torsion sleeve A, it is allowed to the relative rotation between dish axle and pre-tightening mechanism is exported, it is described anti-
Turn round sleeve B and inlay and be on housing B, and coordinate the rotation for limiting whole pre-tightening mechanism by notch and housing.
Beneficial effects of the present invention are：On the one hand the self energizing effort of friction Gear Planet Transmission is realized by relatively simple structure
Function, does not have absolute dependence to the number of planetary gear；Self energizing effort function is realized using the geometrical relationship between rigid body, is reduced
Design, manufacture and the requirement to material property etc.；On the one hand after using wearing, due to using special conical surface planet
Reducing gear, and there is self energizing effort mechanism and pre-tightening mechanism, remain to make to keep sufficiently contact between rolling element, avoid wearing
Afterwards normal pressure deficiency and fail, improve service life and security；Another further aspect can realize the bi-directional of power, can
Meets the needs of functions such as braking energy of electric automobiles recycling.
Brief description of the drawings
Fig. 1 is the geometrical relationship principle sketch of the present invention；
Fig. 2 is the side structure schematic view of the present invention；
Fig. 3 is the cross-sectional view of Fig. 2；
Fig. 4 is the diagrammatic cross-sectional view of the present invention；
Fig. 5 is the structure diagram of planetary gear of the present invention；
Fig. 6 (a, b) is the structure diagram of planet wheel spindle of the present invention；
Fig. 7 is the cross-sectional view of output dish axle of the present invention；
Embodiment
The invention will be further described with reference to the accompanying drawings and examples：
In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise " are based on orientation shown in the drawings or position relationship, are for only for ease of
Description is of the invention to be described with simplified, rather than the device or element of instruction or hint meaning must be with specific orientation, Yi Te
Fixed azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the present invention, " multiple " are meant that two or more,
Unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；It can be direct phase
Even, it can also be indirectly connected by intermediary, can be that connection inside two elements or the interaction of two elements are closed
System.For the ordinary skill in the art, above-mentioned term in the present invention specific can be understood as the case may be
Implication.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it " under "
Can directly it be contacted including the first and second features, it is not directly to contact but pass through it that can also include the first and second features
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " to include first special
Sign is directly over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " fisrt feature that includes are immediately below second feature and obliquely downward, or be merely representative of
Fisrt feature level height is less than second feature.
As shown in Figures 1 to 7, a kind of planetary frictional drive reducing gear with self energizing effort structure, it is characterised in that
Including:Planetary gear speed reducing mechanism, self energizing effort mechanism, pre-tightening mechanism and housing；
The housing includes：Housing A41 and housing B42；
The planetary gear speed reducing mechanism includes：Sun wheel shaft 11, at least two planetary gears 12, regulation planetary gear rotation axis with
The planet carrier 13 of revolution axis and outer ring 14, the housing A41, housing B42 and outer ring 14 are fixedly connected on together, the sun
Wheel shaft 11 is connected with housing into rotation, and the planet carrier 13 is connected with housing into rotation, and the planetary gear 12 is a truncated cone-shaped roller, institute
Stating in sun wheel shaft 11 has and the male cone (strobilus masculinus) of planetary gear 12 is matched contacts circular conical surface 11A, the medial surface of the outer ring 14
For with the male cone (strobilus masculinus) of planetary gear 12 is matched contacts inner conical surface 14A, the sun wheel shaft 11, planetary gear 12 and outer ring 14 it is several
What relation meets：Sun wheel shaft 11, outer ring 14, planet carrier 13 have common axis line Ox, the axis of all rolling elements, all rolling elements
Between contact line, the contact line between planetary gear 12 and outer ring 14 all intersect at a bit, the rolling element refers to sun wheel shaft
11 and planetary gear 12；As shown in Figures 2 to 4, wherein sun wheel shaft 11 is power intake, removes be provided with the contact conical surface thereon
11A, is additionally provided with the first spline 11B coupled with prime mover output terminal, the first mating surface 11C with the lip cooperation of oil sealing 44
And for installing bearing the mounting surface 11D, 11E, 11F of bearing 17,18,19.
The self energizing effort mechanism includes：Planet wheel spindle 21 and output dish axle 22, the output dish axle 22 connect with housing into rotation
Connect, the planetary gear 12 is rotatablely connected by planet wheel spindle 21 and planet carrier 13, and the output dish axle 22 is driven by planet carrier 13；
Pre-tightening mechanism is used to planetary gear 12 being pressed between sun wheel shaft 11 and outer ring 14 to make to keep necessarily just between them
The contact of pressure.
The curved surface to contact with each other between planetary gear 12, sun wheel shaft 11, outer ring is by one and axis co-planar but not parallel
Straight line is rotated about the axis one week and generated, i.e. circular conical surface.Thrust is applied along axis to planetary gear, can be produced on conical surface contact line
Normal pressure.In passing power, by frictional force, circumferentially tangential component provides torque, and the normal pressure between roller is bigger, energy
Enough allow produce frictional force it is bigger, torque capacity is higher.
As shown in Figures 2 to 4, outer ring 14 can be flange type part, and housing is fixed on by flange hole 14C and bolt 43
Between A41 and housing B42, and it is provided with the groove 14B of mounting O-shaped sealing ring 46.
Preferably, the pre-tightening mechanism provides press-in 11 He of sun wheel shaft using spring as compression means as planetary gear 12
Power between outer ring 14 causes planetary gear 12 to carry out a certain amount of movement, the sun gear relative to sun wheel shaft 11 and outer ring 14
Axis 11 and outer ring 14 are not moved axially with respect to housing.
Preferably, the output dish axle 22 is connected with housing into rotation and can slide axially with respect to housing, the planet wheel spindle
21 right end is connected with output dish axle 22, drives output dish axle 22 to rotate while planet wheel spindle 21 revolves round the sun, the pretightening machine
Structure is arranged between housing and output dish axle 22 and provides a thrust to the left for output dish axle 22.
Wherein output dish axle 22 is used as output shaft, is provided with the internal spline 22B coupled with load end, coordinates with seal 45
Mating surface 22C and with bearing 17,18,24 coordinate mating surface 22E, 22F, 22D.
Preferably, the planetary gear 12 is provided with the cylindrical hole 12A of installation radial needle roller bearing 15 along axis, in planetary gear 12
Thrust bearing 16 is installed compared with large end face 12B sides, radial bearing 15 and thrust shaft are correspondingly provided with planet wheel spindle 21
16 mounting surface 21D, 21B is held, the axial force between planetary gear 12 and planet wheel spindle 21 is transmitted by thrust bearing 16, this axial direction
Planetary gear 12 is pressed between sun wheel shaft 11 and outer ring 14 by power.
Preferably, the planet carrier 13 includes preceding retainer 131, rear retainer 132 and pin 23, the preceding retainer
131 are fixedly connected with rear retainer 132 by bolt 133, to install, constrain planet wheel spindle 21；Installed in rear retainer 132
Expense hole 132A on the hole wall of planet wheel spindle 21, and long pin hole 21C, forward and backward holding are set in 21 relevant position of planet wheel spindle
Frame 131,132 can constrain planet wheel spindle 21 and rotation not occur and allows its a small amount of axial movement.
Preferably, 21 tail end of planet wheel spindle has the first wedge surface 21A, the first wedge surface 21A and output dish axle 22
On the second wedge surface 22A cooperate, the first wedge surface 21A and the second wedge surface 22A are identical ruled surface, self energizing effort function
Realization realize that in cylindrical-coordinate system (r, θ, x), surface equation should meet by the first wedge surface 21A and the second wedge surface 22A：
Curved surface is ruled surface, and cylindrical-coordinate system origin is taken in O points, and axis is along Ox directions, the plane of θ=0 and planet wheel spindle
Line overlaps, and l represents to make the vertical line of planet wheel spindle and the intersection point of central axis Ox to seat by intersection point of planet wheel spindle the outer end point in formula
The distance of origin is marked, k represents that main line turns over unit angle around Ox axis and takes less number along Ox to origin direction translation distance, k
Value can prevent self-locking, while also determine the relation between output torque and thrust.Sun wheel shaft, planetary gear and outer ring it is several
What relation should meet：Sun wheel shaft, outer ring, planet carrier have a common axis, all rolling body axis and all rolling elements it
Between contact line all hand on one point.If setting sun wheel shaft cone angle, planetary gear cone angle beta, cup angle γ, then angled pass
System
The β of γ=α+2.
See Fig. 1, two point A and A' are taken on planet wheel spindle line, and vertical line is done by intersection point of A, A', connect with planetary gear-outer ring
Tactile line obtains intersection points B, B'；Intersection point C, C' are obtained with planetary gear-sun wheel shaft contact line.Again by C, C' to sun wheel shaft with it is outer
Circle has common axes O x to do vertical line.
If sun wheel shaft rotating speed is ωs, two rolling elements might as well assuming to contact with each other at contact point B and C there is phase
Same linear velocity, at this time, the linear velocity v at contact point B, CB、vCRespectively：
vB=0, vC=ωsrsC。
The then linear velocity of the A points on planetary gear axis
Planetary gear revolution angular speed can be obtained
Since planetary gear axis is by O points, and fixed angle is kept with central axis Ox all the timeA' points can be obtained
Linear velocity
The angular speed of planetary gear rotation at this time is
And B' points linear velocity on planetary gear
C' points linear velocity on planetary gear can be obtained
In formulaTherefore have
vpB'=0
C' point linear velocities v on sun gearsC'=ωsrsC', B' point linear velocities v on gear ringrB'=0, and have
Then have
vpB'=vrB'
It can thus illustrate, without considering the microscopic of machine components, in this mechanism under each constraints, if
Do not occur to slide relatively at a contact point between two rolling elements, then do not slide yet, can roll at other contact points
Pure rolling can be realized between kinetoplast.This can reduce the negative effects such as abrasion, fever, prolong the service life.
According to above-mentioned calculating process, when sun wheel shaft rotating speed is ωsWhen, planetary gear revolution angular speed
It can determine reducing gear gearratio
And becauseThen gearratio can be determined by rolling element cone angle：
Preferably, the pre-tightening mechanism includes anti-torsion sleeve A31, anti-torsion sleeve B32, preloading spring 33 and thrust bearing
34, the pre-tightening mechanism is installed between output dish axle 22 and housing B42, and the anti-torsion sleeve A31 and anti-torsion sleeve B32 are axial
It is slidably connected and rotational restraint is formed between them as being connected with each other using spline, anti-torsion sleeve A31 and anti-torsion sleeve B32 is played
The effect for preventing preloading spring 33 from twisting, at the same in the case of loaded, limitation output 22 axial location of dish axle, pretension
33 rigidity of spring is larger, and preloading spring 33 has certain pre compressed magnitude when mounted, there is provided the planetary reducer under zero load
Contact normal pressure in structure between sun wheel shaft 11, planetary gear 12 and outer ring 14, the thrust bearing 34 are installed on output dish axle
Between 22 and anti-torsion sleeve A31, it is allowed to export the relative rotation between dish axle 22 and pre-tightening mechanism, the anti-torsion sleeve B32 edges
Embedded on housing B42, and coordinate the rotation for limiting whole pre-tightening mechanism by notch 32A and housing.
The mechanism at work, if non-loaded, passes through the pretightning force of the appropriate preloading spring 33 of design so that output dish axle
Planet wheel spindle is compressed, due to constraint of the retainer to planet wheel spindle so that planet wheel spindle compresses planetary gear in the axial direction, then rolls
Contact normal pressure is produced between kinetoplast, makes deceleration device that there is initial torque capacity.When there is loading moment, due to planetary gear
The wedge surface to contact with each other is provided with self energizing effort function, the power of output panel shaft compression planet wheel spindle in axis and output dish axle
Adjust automatically, by rationally designing foregoing sun gear cone angle, planetary gear cone angle beta, and coefficient k, obtain suitable torque-
Thrust relation, make retarder torque capacity change with the change of load, so as to improve frictional drive efficiency, avoid
Have skidded.
The basic principles, main features and the advantages of the invention have been shown and described above, for this area skill
For art personnel, it is clear that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and without departing substantially from the present invention spirit or
In the case of essential characteristic, the present invention can be realized in other specific forms.Therefore, in all respects, should all incite somebody to action
Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state
Bright restriction, it is intended that including all changes fallen in the implication and scope of the equivalency of claim in the present invention
It is interior.Any reference numeral in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical solution, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (9)
- A kind of 1. planetary frictional drive reducing gear with self energizing effort structure, it is characterised in that including:Planetary reducer Structure, self energizing effort mechanism, pre-tightening mechanism and housing；The housing includes：Housing A (41) and housing B (42)；The planetary gear speed reducing mechanism includes：Sun wheel shaft (11), at least two planetary gears (12), regulation planetary gear rotation axis with The planet carrier (13) of revolution axis and outer ring (14), the housing A (41), housing B (42) and outer ring (14) are fixedly connected on one Rise, the sun wheel shaft (11) is connected with housing into rotation, and the planet carrier (13) is connected with housing into rotation；The self energizing effort mechanism includes：Planet wheel spindle (21) and output dish axle (22), the output dish axle (22) and housing into rotation Connection, the planetary gear (12) are rotatablely connected by planet wheel spindle (21) and planet carrier (13), and the output dish axle (22) is by going Carrier (13) drives；Pre-tightening mechanism is used between planetary gear (12) press-in sun wheel shaft (11) and outer ring (14) to make to keep certain between them The contact of normal pressure.
- 2. a kind of planetary frictional drive reducing gear with self energizing effort structure according to claim 1, its feature exist In：The planetary gear (12) is a truncated cone-shaped roller, has the male cone (strobilus masculinus) phase with planetary gear (12) on the sun wheel shaft (11) The contact circular conical surface (11A) of cooperation, the medial surface of the outer ring (14) is the matched contact of male cone (strobilus masculinus) with planetary gear (12) Inner conical surface (14A), the geometrical relationship of the sun wheel shaft (11), planetary gear (12) and outer ring (14) meet：Sun wheel shaft (11), Outer ring (14), planet carrier (13) have common axis line Ox, contact line, planet between the axis of all rolling elements, all rolling elements Contact line between wheel (12) and outer ring (14) all intersects at a bit, and the rolling element refers to sun wheel shaft (11) and planetary gear (12)。
- 3. a kind of planetary frictional drive reducing gear with self energizing effort structure according to claim 1 or 2, its feature It is：The pre-tightening mechanism provides a press-in sun wheel shaft (11) and outer ring using spring as compression means as planetary gear (12) (14) power between causes planetary gear (12) to carry out a certain amount of movement relative to sun wheel shaft (11) and outer ring (14), it is described too Positive wheel shaft (11) and outer ring (14) are not moved axially with respect to housing.
- 4. a kind of planetary frictional drive reducing gear with self energizing effort structure according to claim 1 or 2, its feature It is：The output dish axle (22) is connected with housing into rotation and can slide axially with respect to housing, the right side of the planet wheel spindle (21) End is connected with output dish axle (22), drives output dish axle (22) to rotate while planet wheel spindle (21) revolves round the sun, the pretightening machine Structure is arranged between housing and output dish axle (22) and provides a thrust to the left for output dish axle (22).
- 5. a kind of planetary frictional drive reducing gear with self energizing effort structure according to claim 2 or 4, its feature It is：The planetary gear (12) along axis be provided with installation radial needle roller bearing (15) cylindrical hole (12A), planetary gear (12) compared with Large end face (12B) side is provided with thrust bearing (16), be correspondingly provided with planet wheel spindle (21) radial bearing (15) and The mounting surface (21D, 21B) of thrust bearing (16), the axial force between planetary gear (12) and planet wheel spindle (21) pass through thrust shaft (16) transmission is held, this axial force is by between planetary gear (12) press-in sun wheel shaft (11) and outer ring (14).
- 6. a kind of planetary frictional drive reducing gear with self energizing effort structure according to claim 4 or 5, its feature It is：The planet carrier (13) includes preceding retainer (131), rear retainer (132) and pin (23), the preceding retainer (131) it is fixedly connected with rear retainer (132) by bolt (133), to install, constrain planet wheel spindle (21)；In rear holding Expense hole (132A) on the hole wall of frame (132) installation planet wheel spindle (21), and it is oval in the setting of planet wheel spindle (21) relevant position Pin hole (21C), forward and backward retainer (131,132) can constrain planet wheel spindle (21) and rotation not occur and allows its a small amount of axis To movement.
- 7. a kind of planetary frictional drive reducing gear with self energizing effort structure according to claim 6, its feature exist In：Planet wheel spindle (21) tail end has the first wedge surface (21A), and first wedge surface (21A) is with exporting in dish axle (22) Second wedge surface (22A) cooperates, and first wedge surface (21A) and the second wedge surface (22A) are identical ruled surface.
- 8. a kind of planetary frictional drive reducing gear with self energizing effort structure according to claim 7, its feature exist In：In cylindrical-coordinate system (r, θ, x), surface equation should meet：Curved surface is ruled surface, and cylindrical-coordinate system origin is taken in O points, and axis is along Ox directions, the plane of θ=0 and planetary gear axis weight Close, l represents to make the vertical line of planet wheel spindle and the intersection point of central axis Ox to coordinate original by intersection point of planet wheel spindle the outer end point in formula The distance of point, k represent that main line turns over unit angle along Ox to origin direction translation distance around Ox axis, and k takes less numerical value can Prevent self-locking, while also determine the relation between output torque and thrust,So that planet wheel spindle (21) and output dish axle (22) the always plane-plane contact, while export dish axle (22) and planet in contact Frame (13) phase difference θ has linear relationship with planet wheel spindle (21) axial displacement.
- 9. a kind of planetary frictional drive reducing gear with self energizing effort structure according to claim 3, its feature exist In：The pre-tightening mechanism includes anti-torsion sleeve A (31), anti-torsion sleeve B (32), preloading spring (33) and thrust bearing (34), institute State pre-tightening mechanism to be installed between output dish axle (22) and housing B (42), the anti-torsion sleeve A (31) and anti-torsion sleeve B (32) It is in axial sliding connection and rotational restraint is formed between them, anti-torsion sleeve A (31) and anti-torsion sleeve B (32), which are played, prevents pretension bullet The effect that spring (33) twists, at the same in the case of loaded, limitation output dish axle (22) axial location, preloading spring (33) there is certain pre compressed magnitude when mounted, there is provided sun wheel shaft (11), planet in the planetary gear speed reducing mechanism under zero load The contact normal pressure between (12) and outer ring (14) is taken turns, the thrust bearing (34) is installed on output dish axle (22) and anti-torsion sleeve Between A (31), it is allowed to export relative rotation of the dish axle (22) between pre-tightening mechanism, the anti-torsion sleeve B (32), which is inlayed, to be On housing B (42), and coordinate the rotation for limiting whole pre-tightening mechanism by notch (32A) and housing.
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| CN201711429708.9A CN107956843A (en) | 2017-12-26 | 2017-12-26 | A kind of planetary frictional drive reducing gear with self energizing effort structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711429708.9A CN107956843A (en) | 2017-12-26 | 2017-12-26 | A kind of planetary frictional drive reducing gear with self energizing effort structure |
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| CN107956843A true CN107956843A (en) | 2018-04-24 |
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| CN201711429708.9A Pending CN107956843A (en) | 2017-12-26 | 2017-12-26 | A kind of planetary frictional drive reducing gear with self energizing effort structure |
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| CN110594363A (en) * | 2019-08-23 | 2019-12-20 | 重庆大学 | Traction type robot speed reducer |
| CN114600856A (en) * | 2022-03-23 | 2022-06-10 | 中国农业大学 | Multifunctional autonomous pesticide spraying robot device, and driving control method and operation method thereof |
| CN116816891A (en) * | 2023-08-29 | 2023-09-29 | 中国科学院宁波材料技术与工程研究所 | Composite planetary transmission speed reducer and driving unit |
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| GB446526A (en) * | 1934-10-31 | 1936-04-30 | Cyril Dell | Improvements in frictional planetary gears |
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| CN116816891A (en) * | 2023-08-29 | 2023-09-29 | 中国科学院宁波材料技术与工程研究所 | Composite planetary transmission speed reducer and driving unit |
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