CN107654586B - Hollow type hypocycloid planetary reduction gear - Google Patents
Hollow type hypocycloid planetary reduction gear Download PDFInfo
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- CN107654586B CN107654586B CN201710935204.8A CN201710935204A CN107654586B CN 107654586 B CN107654586 B CN 107654586B CN 201710935204 A CN201710935204 A CN 201710935204A CN 107654586 B CN107654586 B CN 107654586B
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- output section
- retainer
- assembly
- hole
- planetary reduction
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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
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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
- F16H2001/323—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 comprising eccentric crankshafts driving or driven by a gearing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
The present invention provides a kind of hollow type hypocycloid planetary reduction gears, it include: retainer, input unit, Cycloidal Wheel, output section and multiple crank axles, each crank axle is equipped with input shaft end and gearratio of cycloid axle formation, the gear teeth in input unit are meshed with the gear teeth on input shaft end, input unit is equipped with first and runs through centre bore, Cycloidal Wheel is equipped with central through hole and multiple assembly through-holes, multiple crank axles pass through assembly through-hole correspondingly, and gearratio of cycloid axle formation is assemblied in assembly through hole, the hole wall of central through hole is equipped with the hypocycloid gear teeth, output section is equipped with epicycloidal wheel tooth and second and runs through centre bore, output section passes through the central through hole of Cycloidal Wheel, and epicycloidal wheel tooth is meshed with the hypocycloid gear teeth, and first is coaxial arrangement through the central axis that the central axis of centre bore and second run through centre bore.The technical issues of internal structure complexity, the processing difficulties of epicycloid planetary reduction gear existing in the prior art are able to solve using the technical program.
Description
Technical field
The invention belongs to mechanical equipment or robotic technology fields, are to be related to a kind of hollow type hypocycloid more specifically
Planetary reduction gear.
Background technique
Mainstream cycloid planetary speed reducer uses epicyclodial wheel generally to do eccentric motion and realize deceleration at present.It is this
Reducer structure generally uses planet carrier, output panel or wheel spider (or needle tooth retainer) output.
In the prior art, Cycloidal Wheel and the external toothing of needle tooth in epicyclic reduction, will be with eccentric shaft (or partially inside Cycloidal Wheel
Heart set) cooperation realization eccentric motion, result in the internal structure of epicycloid planetary reduction gear more complicated in this way, processing difficulties.
Summary of the invention
It is existing in the prior art to solve the purpose of the present invention is to provide a kind of hollow type hypocycloid planetary reduction gear
The technical issues of internal structure of epicycloid planetary reduction gear is complicated, processing difficulties.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of hollow type hypocycloid planetary reduction gear is provided,
It include: retainer；Multiple crank axles, multiple crank axles are installed in rotation on retainer, and each crank axle is equipped with input
Shaft end and gearratio of cycloid axle formation；Input unit, the gear teeth in input unit are meshed with the gear teeth on input shaft end, and input unit is equipped with first and passes through
Wear centre bore；Cycloidal Wheel, Cycloidal Wheel is equipped with central through hole and multiple assembly through-holes, multiple crank axles pass through dress correspondingly
With through-hole, and gearratio of cycloid axle formation is assemblied in assembly through hole, and the hole wall of central through hole is equipped with the hypocycloid gear teeth；Output section, output
Portion is rotatably installed on retainer, and output section is equipped with epicycloidal wheel tooth and second runs through centre bore, and output section passes through pendulum
The central through hole of line wheel, and epicycloidal wheel tooth is meshed with the hypocycloid gear teeth, and first through centre bore central axis with
Second central axis for running through centre bore is coaxial arrangement.
Further, the end of output section, which is equipped with, assembles end slot, in the end plugging in fitting end slot of input unit, and assembles
The first assembly bearing is equipped between the slot peripheral wall of end slot and the end outer wall of input unit, hollow type hypocycloid planetary reduction gear also wraps
Sealing baffle is included, sealing baffle is set to second in centre bore, and the first assembly bearing is located at input unit and sealing baffle
Between.
Further, seal fitting is equipped between output section and retainer, the lateral wall of retainer is equipped with for installing O
The sealing ring mounting groove of type sealing ring.
Further, output section is equipped with lubrication runner for the lubricating oil that circulates, and lubricate the input port of runner with
Pipe thread seal screw hole is arranged in delivery outlet, is sealed in pipe thread seal screw hole by pipe thread seal screw with reality
Now seal.
Further, epicycloidal wheel tooth is cylindrical needle tooth, and the outer wall of output section is equipped with needle tooth mounting groove, and cylindrical needle tooth is put
It is placed in needle tooth mounting groove, the part that cylindrical needle tooth protrudes from needle tooth mounting groove forms the engaging portion with epicycloidal wheel tooth.
Further, epicycloidal wheel tooth be output section outer wall on bulge-structure, bulge-structure and output section one at
Type.
Further, it is set on each crank axle there are two gearratio of cycloid axle formation, relative to crank axle between two gearratio of cycloid axle formation
The eccentric direction of central axis is in 180 °.
Further, the quantity of multiple crank axles is two, and two crank axles are symmetrical relative to the central axis of Cycloidal Wheel
Setting.
Further, retainer includes the first retainer and the second retainer, and the first retainer and the second retainer seal
Connection forms assembly space, the gearratio of cycloid axle formation of crank axle, Cycloidal Wheel, between the three of output section assembly connection in assembly space.
Further, be equipped with the first seal fitting between the first retainer and output section, the second retainer and output section it
Between be equipped with the second seal fitting, the gearratio of cycloid axle formation of crank axle, Cycloidal Wheel, assembly connection part is located at first between the three of output section
Between seal fitting, the second seal fitting and retainer.
The hollow type hypocycloid planetary reduction gear can be good at being made into compact hollow structure, this mainly has benefited from cycloid
The mesh form of the epicycloidal wheel tooth of the hypocycloid gear teeth and output section of wheel, needle tooth position is on the inside of the Cycloidal Wheel, and needle tooth distribution
The center of output section can be used to that hollow structure is made, i.e., second runs through centre bore.This hollow structure utilizes Cycloidal Wheel
The hypocycloid gear teeth and the epicycloidal wheel tooth of output section between the structural advantage that engages, can make full use of space and subtract without increasing
The fast integrally-built complexity of device.And very compact structure may be implemented in the hollow type hypocycloid planetary reduction gear, reduces
Axial dimension, this is of great significance to the rigidity of parts such as raising crank axle and the overall structure rigidity of retarder.In addition, should
The innovation structure of hollow type hypocycloid planetary reduction gear can make full use of structural advantage, realize biggish hollow ratio, hollow
Laser propagation effect is more preferable.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the structural schematic diagram of the crank axle of the hollow type hypocycloid planetary reduction gear of the embodiment of the present invention；
Fig. 2 is the cross-sectional view perpendicular to axial direction of the hollow type hypocycloid planetary reduction gear of the embodiment of the present invention；
Fig. 3 is the input shaft about input unit and crank axle of the hollow type hypocycloid planetary reduction gear of the embodiment of the present invention
The structural schematic diagram of matching relationship between end；
Fig. 4 is the structural schematic diagram of the crank axle of the hollow type hypocycloid planetary reduction gear of the embodiment of the present invention；
Fig. 5 is the cross-sectional view of the Cycloidal Wheel of the hypocycloid planetary reduction gear of the embodiment of the present invention；
Fig. 6 is the cross-sectional view of the output section of the hypocycloid planetary reduction gear of the embodiment of the present invention；
Fig. 7 is the assembling structure schematic diagram of the hypocycloid planetary reduction gear of the embodiment of the present invention；
Fig. 8 is that the assembly of the view direction perpendicular to axial direction of the hypocycloid planetary reduction gear of the embodiment of the present invention is shown
It is intended to.
Wherein, each appended drawing reference in figure:
10, retainer；11, the first retainer；12, the second retainer；20, crank axle；21, input shaft end；22, eccentric shaft
Section；30, input unit；40, Cycloidal Wheel；401, central through hole；402, through-hole is assembled；41, the hypocycloid gear teeth；50, output section；51,
Epicycloidal wheel tooth；61, the first assembly bearing；62, the second assembly bearing；63, third assembles bearing；64, the 4th assembly bearing；
65, the 5th assembly bearing；66, the 6th assembly bearing；67, the 7th assembly bearing；811, the first seal fitting；812, the second sealing
Accessory；82, sealing ring mounting groove；90, planetary gear；31, first runs through centre bore；52, second runs through centre bore；70, it seals
Baffle.
Specific embodiment
In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, tie below
Accompanying drawings and embodiments are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element
On one element or indirectly on another element.When an element is known as " being connected to " another element, it can
To be directly to another element or be indirectly connected on another element.
It is to be appreciated that term " length ", " width ", "upper", "lower", "front", "rear", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom", "inner", "outside" is that orientation based on the figure or position are closed
System, is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must have
Specific orientation is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
As shown in Figures 1 to 8, the hypocycloid planetary reduction gear of the present embodiment includes retainer 10, input unit 30, Cycloidal Wheel
40, output section 50 and multiple crank axles 20, multiple crank axles 20 are installed in rotation on retainer 10, on each crank axle 20
Equipped with input shaft end 21 and gearratio of cycloid axle formation 22, the gear teeth in input unit 30 are meshed with the gear teeth on input shaft end 21, input unit
30 run through centre bore 31 equipped with the central axial direction along input unit 30 penetrates through first, and Cycloidal Wheel 40 is equipped with central through hole
401 and multiple assembly through-holes 402, multiple crank axles 20 pass through assembly through-hole 402 correspondingly, and gearratio of cycloid axle formation 22 is assemblied in
It assembles at through-hole 402, the hole wall of central through hole 401 is equipped with the hypocycloid gear teeth 41, and output section 50 is rotatably installed on holding
On frame 10, output section 50 be equipped with epicycloidal wheel tooth 51 and second run through centre bore 52, wherein second through centre bore 52 along
The central axial direction of output section 50 penetrates through setting, and output section 50 passes through the central through hole 401 of Cycloidal Wheel 40, and epicycloidal wheel tooth
51 are meshed with the hypocycloid gear teeth 41, and first runs through the central axis and second of centre bore 31 through the center of centre bore 52
Axis be coaxial arrangement (first through centre bore 31 central axis be input unit 30 central axis, second run through center
The central axis in hole 52 is the central axis of output section 50).
Power is carried out transmitting conveying during the work time, by input unit 30 by the hypocycloid planetary reduction gear, and bent
Transmission is realized by gear teeth meshing between the input shaft end 21 and input unit 30 of arbor 20, herein the tooth number of input shaft end 21
Greater than the tooth number of input unit 30, i.e. transmission ratio between input unit 30 and crank axle 20 is less than 1, to realize that the first order is slowed down
Transmission, crank axle 20 is around own axis, so that the rotation of gearratio of cycloid axle formation 22 on crank axle 20 drives Cycloidal Wheel 40 around output
The central axis in portion 50 revolves, during Cycloidal Wheel 40 is revolved, the hypocycloid gear teeth 41 in Cycloidal Wheel 40 with
Epicycloidal wheel tooth 51 on output section 50 realizes engagement, the interaction force between interior cycloidal gear teeth 41 and epicycloidal wheel tooth 51
Under the action of, Cycloidal Wheel 40 around own axes carry out with the contrary spinning motion of revolving, and output section 50 also simultaneously around
Own axes carry out the rotation rotation opposite with 40 sense of rotation of Cycloidal Wheel, and (retainer 10 is fixed setting, output section 50 at this time
As power output power part, it is illustrated below using retainer 10 as the supporting element of fixed setting), in this way,
Second level deceleration transmission is realized by transmission process of the Cycloidal Wheel 40 to output section 50.Also, due to input unit 30 and output
First is respectively correspondingly provided in portion 50 through centre bore 31, second through centre bore 52, so as to run through center first
Laying control route or hydraulic oil control pipeline etc. are interted in hole 31 and second in centre bore 52, are easy to use the planet
The mechanical equipment of retarder or the wires design of robot are conducive to optimization design mechanical equipment or robot overall structure,
Further realize the Miniaturization Design of mechanical equipment or robot.By the hypocycloid gear teeth 41 and the output that design Cycloidal Wheel 40
Between the epicycloidal wheel tooth 51 in portion 50 engagement assembly so that Cycloidal Wheel 40 structure design realize miniaturization, and by
Input unit 30, the setting of output section 50 first run through centre bore 52 through centre bore 31, second, so that line related is laid or liquid
The laying of pressure oil control pipeline further realizes optimization, to be conducive to the integrally-built miniaturization layout of retarder, and leads to
Double reduction driven Design in total is crossed, the transmission ratio between input unit 30 and output section 50 is further decreased, realizes input speed
With the biggish deceleration transmission of difference of output revolving speed, and the gerotor type row of the hypocycloid planetary reduction gear compared with the existing technology
For star retarder, internal design structures are simplified, and reduce the degree of difficulty of processing technology.
In the present embodiment, epicycloidal wheel tooth 51 is cylindrical needle tooth, as shown in Fig. 2, the outer wall of output section 50 is equipped with needle
Tooth mounting groove, cylindrical needle tooth are placed in needle tooth mounting groove, and the part that cylindrical needle tooth protrudes from needle tooth mounting groove is formed and outer pendulum
The engaging portion of line wheel tooth 51.Interior cycloid planetary speed reducer work during, Cycloidal Wheel 40 with crank axle 20 bias
Shaft part 22 rotates and the central axis around Cycloidal Wheel 40 revolves, while tooling, the hypocycloid gear teeth 41 of Cycloidal Wheel 40
Interaction force can be generated between epicycloidal wheel tooth 51, at this point, Cycloidal Wheel 40 carries out rotation under the action of interaction force
Movement, and during cooperating the spinning motion of Cycloidal Wheel 40, output section 50 is also around own axes under the action of interaction force
It carries out spinning motion and the power that input unit 30 inputs is risen into subsequent resume of square through deceleration and is passed.Due to the epicycloid on output section 50
The gear teeth 51 are mounted to the cylindrical needle tooth in needle tooth mounting groove, which is that the hypocycloid gear teeth 41 of Cycloidal Wheel 40 are mutual
During effect, cylindrical needle tooth can also roll in installation groove, namely during the work of interior cycloid planetary speed reducer,
The cell wall of cylindrical needle tooth and needle tooth mounting groove generates sliding friction, and simultaneously between epicycloidal wheel tooth 51 and the hypocycloid gear teeth 41
There is also opposite sliding frictions in engagement process, to cause the loss in power transmission process.
In order to be further reduced the loss in power transmission process, the present embodiment can also use as shown in Figure 5 and Figure 6
For the bulge-structure on the outer wall of output section 50, (bulge-structure is the outer pendulum on the periphery wall of output section 50 to epicycloidal wheel tooth 51
The linear gear teeth, the shapes of the cross-sectional profiles of the gear teeth of each protrusion are a semi-circular shape, between the two neighboring gear teeth away from
From the width for a gear teeth), bulge-structure and output section 50 are integrally formed.At this point, epicycloidal wheel tooth 51 and output section 50 it
Between no longer generate any relative motion friction, be mounted in the cylindrical needle in needle tooth mounting groove with above-mentioned epicycloidal wheel tooth 51
The design form of tooth is compared, be integrally formed design epicycloidal wheel tooth 51 and output section 50 design form in, Cycloidal Wheel 40 with
The sliding friction loss generated during the hypocycloid gear teeth 41 are meshed with epicycloidal wheel tooth 51 is only existed between output section 50,
Reduce sliding friction loss of the cylindrical needle tooth in needle tooth mounting groove, therefore further increases the efficiency of power transmitting.
The quantity of multiple crank axles 20 in the present embodiment is even number, and relative to pendulum between even number crank axle 20
The central axis of line wheel 40 is symmetrical arranged, and sets that there are two gearratio of cycloid axle formation 22 on each crank axle 20, and in the same crank axle
On 20, relative to the eccentric direction of the central axis of crank axle 20 in 180 ° between two gearratio of cycloid axle formation 22, as shown in Figure 4.Phase
Ying Di, the quantity for being fitted to the Cycloidal Wheel 40 in gearratio of cycloid axle formation 22 is two, in the process of the revolution of Cycloidal Wheel 40, rotation
In, due to being in 180 ° between the eccentric direction of two gearratio of cycloid axle formation 22 on each crank axle 20, then two Cycloidal Wheels 40 revolve
When be constantly in the central axis relative to output section 50 in 180 ° of beats, this makes it possible to the epicyclodial wheels for making output section 50
Active force from the hypocycloid gear teeth 41 suffered by tooth 51 mutually balances, it will be able to keep the stabilization of 50 output power of output section
Property.Specifically, in the present embodiment, the quantity of multiple crank axles 20 is two, and two crank axles 20 are relative to Cycloidal Wheel 40
Central axis is symmetrical arranged.
As shown in Figure 1, in order to be sealed operation from the unilateral side of output section 50 to hypocycloid planetary reduction gear realization, from
And compared with the prior art in need from input side and outlet side two sides and meanwhile be sealed operation for simplify the hypocycloid
Therefore the Seal Design structure of planetary reduction gear is equipped with seal fitting between output section 50 and retainer 10, retainer 10 it is outer
Side wall is equipped with the sealing ring mounting groove 82 for mounting O-shaped sealing ring, installs by the hypocycloid planetary reduction gear to corresponding
Mechanical frock system or robot arm in carry out deceleration transmission, at this time by sealing ring mounting groove 82 mounting O-shaped it is close
The external mounting shell body of the external installation shell or robot arm of seal and mechanical frock system forms sealing assembly, thus right
Sealed set of the hypocycloid planetary reduction gear on input extreme direction.The lateral wall of retainer 10 is being made to pass through O-shaped sealing
While forming sealing assembly between circle and external installation shell, in order to make output section 50 obtain more stable support,
Remain stable during rotating output, therefore, the end of output section 50 is equipped with assembly end slot, the end of input unit 30
In portion's plugging in fitting end slot, and assembles and be equipped with the first assembly bearing between the slot peripheral wall of end slot and the end outer wall of input unit 30
61, and hollow type hypocycloid planetary reduction gear further includes sealing baffle 70, and sealing baffle 70 is set to second through centre bore
In 52, and the first assembly bearing 61 is between input unit 30 and sealing baffle 70.It, then can be with by the blocking of sealing baffle 70
Stop greasing substance (such as lubrication has or lubricating grease) to be leaked from second through centre bore 52, and assembles the sealing of completion
Baffle 70 and O-ring seal, which are formed, to be cooperated, so that the seal operation to input end side can be completed in assembling process, is being used
Cheng Zhong, operation need to be only sealed to outlet side can realize effective sealing behaviour to entire hollow type hypocycloid planetary reduction gear
Make.Therefore, output section 50 is equipped with the lubrication runner for the lubricating oil that circulates, and the input port for lubricating runner is set with delivery outlet
Pipe thread seal screw hole is set, is sealed in pipe thread seal screw hole by pipe thread seal screw (not shown) with reality
Now seal.Further, retainer 10 includes the first retainer 11 and the second retainer 12, and the first retainer 11 and second is kept
The sealed connection of frame 12 forms assembly space, the gearratio of cycloid axle formation 22 of crank axle 20, Cycloidal Wheel 40, the company of assembly between 50 three of output section
It is connected in assembly space, also, is equipped with the first seal fitting 811, the second retainer between the first retainer 11 and output section 50
The second seal fitting 812, the gearratio of cycloid axle formation 22 of crank axle 20, Cycloidal Wheel 40, output section 50 3 are equipped between 12 and output section 50
Assembly connection part is between the first seal fitting 811, the second seal fitting 812 and retainer 10 between person.Therefore, for
For single hypocycloid planetary reduction gear, pipe thread seal screw, the first seal fitting 811 and the second seal fitting 812 are utilized
It forms internal cycloid planetary speed reducer and is sealed assembly manipulation, the hypocycloid planetary reduction gear of this implementation from output end unilateral side
The planetary reduction gear of single epicycloid form must carry out close from input terminal and output end both direction in compared with the existing technology
It seals for assembly manipulation, which simplifies the form of the sealing assembly manipulation of single retarder, thus simple
The internal cycloid planetary speed reducer of staff assembly work, i.e. the second retainer 12 passes through third assembly with output section 50
63 joint transmission of bearing, and output section 50 and second is located at by the second seal fitting 812, crank axle 20 and Cycloidal Wheel 40 and is protected
12 inside of frame is held, realizes output side direction single-side sealing.Outlet side progress may be implemented in the hollow type hypocycloid planetary reduction gear
Single-side sealing does not need the increase seal structural part outside outlet side and (increases O-ring seal and external mounting shell in input side
It is sealed between body), so that export structure can be more various, using will more extensively.
As shown in Figure 1, the end of output section 50 not only passes through the cooperation of the first assembly bearing 61 on the end of input unit 30,
And the outer wall of the end of output section 50 is provided with the second assembly bearing 62, and which is fixedly mounted on the first guarantor
It holds on frame 11, in addition, being equipped with third between output section 50 and the second retainer 12 assembles bearing 63, such output section 50 passes through the
One assembly bearing 61, second assembles the cooperation support between bearing 62 and third assembly 63 three of bearing, so that output section 50 exists
It can remain stable during rotational motion transmitting output power, and ensure hypocycloid planetary reduction gear entirety
Concentricity and rigidity.In two crank axles 20 of the present embodiment, first crank axle 20 passes through the 4th assembly bearing 64 and the 5th
Assembly bearing 65 is mounted on retainer 10, and second crank axle 20 is pacified by the 6th assembly bearing 66 and the 7th assembly bearing 67
On retainer 10.
In the present embodiment, the axial wall of the gearratio of cycloid axle formation 22 of each crank axle 20 and the assembly through-hole 402 of Cycloidal Wheel 40
Spring bearing is equipped between hole wall, so that relatively rotating between gearratio of cycloid axle formation 22 and the assembly through-hole 402 of Cycloidal Wheel 40 smooth.
Certainly, it can also be carried out using hydrostatic bearing between the axial wall of gearratio of cycloid axle formation 22 and the hole wall of the assembly through-hole 402 of Cycloidal Wheel 40
Associated lubrication support, to reduce the abrasion between the axial wall of gearratio of cycloid axle formation 22 and the hole wall of assembly through-hole 402.
The gear teeth on the input shaft end 21 of crank axle 20 can be set to directly be arranged on the end of crank axle 20 and gradually open
The gear teeth of wire type as shown in figure 4, being meshed with the evolvent type gear teeth corresponding in input unit 30, and are realized in transmission process
The first order is slowed down；Alternatively, assembling planetary gear 90, planetary gear on the end of crank axle 20 as shown in Fig. 3, Fig. 7 and Fig. 8
Matched by spline with corresponding spline between 90 and the end of crank axle 20, by the gear teeth on planetary gear 90 with it is defeated
The gear teeth for entering portion 30 are meshed and realize the first order and slow down.
Alternatively, it is also possible to which installation is fixed to support as the fixed of the hypocycloid planetary reduction gear in output section 50
Point, at this point, from 30 input power of input unit, the gear teeth of the input shaft end 21 of the gear teeth of the power Jing Guo input unit 30 and crank axle 20
Transmission realizes that the first order is slowed down, and then drives retainer 10 to rotate in revolution, the rotation by Cycloidal Wheel 40 and realizes the second level
Slow down, at this time retainer 10 be used as power output part, with using output section 50 as power output part compared with, utilize holding
Output rotation direction when frame 10 is as power output part is opposite with the output rotation direction of output section 50.
In terms of comprehensive, the hypocycloid planetary reduction gear that the technical program provides has the advantage that
1, the hypocycloid planetary reduction gear is improved the external toothing form of traditional Cycloidal Wheel and needle tooth by structure innovation
For internal messing form.The innovation of this internal messing form and structure is so that the epicycloidal wheel tooth 51 of output section 50 is located at Cycloidal Wheel 40
Inside be meshed with the hypocycloid gear teeth 41, and the internal structure of Cycloidal Wheel 40 is simplified, to simplify hypocycloid
The whole design of planetary reduction gear is processed.
2, the hypocycloid planetary reduction gear is become smaller the axial dimension of crank axle 20 by structure innovation, and rigidity increases, interior
The overall stiffness of cycloid planetary speed reducer and service life are also improved.Meanwhile the axial dimension of hypocycloid planetary reduction gear reduces
So that the structure of the hypocycloid planetary reduction gear is more compact.
3, the hypocycloid planetary reduction gear passes through the 4th that structure innovation couples 20 end point of crank axle in traditional structure
Assembly bearing the 64, the 5th assembles bearing 65 (the 6th assembly bearing 66 and the 7th assembly bearing 67) and is built in retainer 10, and
And output section 50 is placed on the outside of bearing hole (outside in the axial direction), output section 50 and the second retainer 12 pass through bearing
Couple with oil sealing, effective output side seal is realized in the sealing of oil sealing.
4, matching between the output section 50 and output section 50 and the second retainer 12 of hypocycloid planetary reduction gear design
Close the sealing to realize outlet side.For input side, the sealing installation of radial O-ring seal is provided on the first retainer 11
Slot realizes sealing by the cooperation with external input structure.For outlet side, lubrication flow is devised on output section 50
Road realizes lubricating oil injection and discharge to the hypocycloid planetary reduction gear by lubricating the oilhole of runner.And pass through pipe
The sealing of thread seal screw.Not needing external structure can be carried out sealing, so that export structure more diversity.
5, the hypocycloid planetary reduction gear in addition to the advantages described above, also includes compact-sized, retarder overall stiffness
It is good, long service life；Theoretical research shows that the output of the hypocycloid planetary reduction gear is more stable；The hypocycloid of Cycloidal Wheel 40
The not complicated internal structure of 41 structure of the gear teeth, so that Cycloidal Wheel is more readily processed.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (9)
1. a kind of hollow type hypocycloid planetary reduction gear characterized by comprising
Retainer (10)；
Multiple crank axles (20), multiple crank axles (20) are installed in rotation on the retainer (10), each described
Crank axle (20) is equipped with input shaft end (21) and gearratio of cycloid axle formation (22)；
Input unit (30), the gear teeth on the input unit (30) are meshed with the gear teeth on the input shaft end (21), described defeated
The tooth number for entering shaft end (21) is greater than the tooth number of the input unit (30), and the input unit (30) is equipped with first and runs through centre bore
(31)；
Cycloidal Wheel (40), the Cycloidal Wheel (40) is equipped with central through hole (401) and multiple assembly through-holes (402), multiple described
Crank axle (20) passes through the assembly through-hole (402) correspondingly, and the gearratio of cycloid axle formation (22) is assemblied in the assembly and leads to
At hole (402), the hole wall of the central through hole (401) is equipped with the hypocycloid gear teeth (41)；
Output section (50), the output section (50) are rotatably installed on the retainer (10), on the output section (50)
Run through centre bore (52) equipped with epicycloidal wheel tooth (51) and second, the output section (50) passes through the center of the Cycloidal Wheel (40)
Through-hole (401), and the epicycloidal wheel tooth (51) is meshed with the hypocycloid gear teeth (41), and described first runs through center
The central axis in hole (31) is coaxial arrangement with the described second central axis through centre bore (52)；
The end of the output section (50) is equipped with assembly end slot, and the assembly end slot is inserted into the end of the input unit (30)
It is interior, and it is equipped with the first assembly bearing (61) between the slot peripheral wall of the assembly end slot and the end outer wall of the input unit, it is described
Hollow type hypocycloid planetary reduction gear further includes sealing baffle (70), and the sealing baffle (70) is set to described second and runs through
In heart hole (52), and first assembly bearing (61) is between the input unit (30) and the sealing baffle (70).
2. hollow type hypocycloid planetary reduction gear as described in claim 1, which is characterized in that the output section (50) with it is described
Seal fitting is equipped between retainer (10), the lateral wall of the retainer (10) is equipped with for the close of mounting O-shaped sealing ring
Seal mounting groove (82).
3. hollow type hypocycloid planetary reduction gear as claimed in claim 2, which is characterized in that the output section (50) is equipped with
For the lubrication runner for the lubricating oil that circulates, and pipe thread seal screw is arranged in the input port of the lubrication runner and delivery outlet
Hole is sealed in the pipe thread seal screw hole to realize sealing by pipe thread seal screw.
4. hollow type hypocycloid planetary reduction gear as described in claim 1, which is characterized in that the epicycloidal wheel tooth (51) is
Cylindrical needle tooth, the outer wall of the output section (50) are equipped with needle tooth mounting groove, and the cylindrical needle tooth is placed in the needle tooth installation
In slot, the part that the cylindrical needle tooth protrudes from the needle tooth mounting groove is formed nibbles with what the hypocycloid gear teeth (41) were meshed
Close part.
5. hollow type hypocycloid planetary reduction gear as described in claim 1, which is characterized in that the epicycloidal wheel tooth (51) is
Bulge-structure on the outer wall of the output section (50), the bulge-structure and the output section (50) are integrally formed.
6. hollow type hypocycloid planetary reduction gear as described in claim 4 or 5, which is characterized in that each crank axle
(20) there are two being set on the gearratio of cycloid axle formation (22), relative to the crank axle (20) between two gearratio of cycloid axle formation (22)
The eccentric direction of central axis is in 180 °.
7. hollow type hypocycloid planetary reduction gear as claimed in claim 6, which is characterized in that multiple crank axles (20)
Quantity is two, and two crank axles (20) are symmetrical arranged relative to the central axis of the Cycloidal Wheel (40).
8. hollow type hypocycloid planetary reduction gear as claimed in claim 3, which is characterized in that the retainer (10) includes the
One retainer (11) and the second retainer (12), first retainer (11) and second retainer (12) are tightly connected shape
At assembly space, the gearratio of cycloid axle formation (22) of the crank axle (20), the Cycloidal Wheel (40), between the output section (50) three
Assembly connection is in the assembly space.
9. hollow type hypocycloid planetary reduction gear as claimed in claim 8, which is characterized in that first retainer (11) with
Be equipped with the first seal fitting (811) between the output section (50), second retainer (12) and the output section (50) it
Between be equipped with the second seal fitting (812), gearratio of cycloid axle formation (22), the Cycloidal Wheel (40), the output of the crank axle (20)
Assembly connection part is located at first seal fitting (811), second seal fitting (812) and institute between portion (50) three
It states between retainer (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710935204.8A CN107654586B (en) | 2017-10-10 | 2017-10-10 | Hollow type hypocycloid planetary reduction gear |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710935204.8A CN107654586B (en) | 2017-10-10 | 2017-10-10 | Hollow type hypocycloid planetary reduction gear |
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| Publication Number | Publication Date |
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| CN107654586A CN107654586A (en) | 2018-02-02 |
| CN107654586B true CN107654586B (en) | 2019-10-08 |
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| CN113756057B (en) * | 2020-06-03 | 2024-03-22 | 青岛海尔洗衣机有限公司 | Deceleration clutch device of washing machine, washing machine and control method |
| CN117195592B (en) * | 2023-11-06 | 2024-01-26 | 龙门实验室 | Interference-free part selection and matching method for cycloidal gear reducer rotating arm bearing |
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| JP4267950B2 (en) * | 2003-03-28 | 2009-05-27 | 住友重機械工業株式会社 | Internal gear swing type intermeshing planetary gear unit |
| JP5297756B2 (en) * | 2008-10-20 | 2013-09-25 | ナブテスコ株式会社 | Gear transmission |
| JP5552359B2 (en) * | 2010-05-11 | 2014-07-16 | ナブテスコ株式会社 | Reduction gear |
| CN102080707A (en) * | 2011-02-22 | 2011-06-01 | 德州高科力液压有限公司 | Two-end output speed reducing transmission device |
| CN207297757U (en) * | 2017-10-10 | 2018-05-01 | 深圳先进技术研究院 | A kind of hypocycloid planetary reduction gear of hollow needleless tooth |
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