CN102748432B - A kind of speed reducer - Google Patents
A kind of speed reducer Download PDFInfo
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- CN102748432B CN102748432B CN201210258630.XA CN201210258630A CN102748432B CN 102748432 B CN102748432 B CN 102748432B CN 201210258630 A CN201210258630 A CN 201210258630A CN 102748432 B CN102748432 B CN 102748432B
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Abstract
The present invention discloses a kind of speed reducer, and comprise primary planet row and secondary planet row, the two all has planet wheel, planet carrier, planet axis, sun gear; The sun gear of described primary planet row is connected with power intake, speed reducer also comprises the ring gear be connected with clutch end, ring gear is provided with one-level internal tooth and secondary internal tooth, and the planet wheel that one-level internal tooth is arranged with primary planet engages, and the planet wheel that secondary internal tooth is arranged with secondary planet engages.Primary planet row and secondary planet row are shared an integral inner gear ring by the speed reducer in this invention, the scheme in secondary gear ring is placed on compared to primary annulus of the prior art, annular gear structure can be simplified, make the layout of ring gear on speed reducer more compact, reduce the space taking complete machine, thus reduce the volume of speed reducer, make it be tending towards miniaturization and be convenient to install, meet consumers' demand, expand Applicable scope; And the reliability of integral inner gear ring is high, and power loss is little, contribute to improving transmission efficiency.
Description
Technical field
The present invention relates to technical field of engineering machinery, particularly a kind of speed reducer.
Background technique
Speed reducer is very extensive in technical field of engineering machinery application, such as, is equipped with speed reducer in the engineering machinery such as hoist, excavator, road roller.
Speed reducer is as the term suggests be exactly the speed of input reduced.Power equals the product of speed and moment of torsion, and in drive path road, because power is constant, while speed reduces, moment of torsion is improved, and the effect of speed reducer is exactly mainly that deceleration increasing is turned round.
Speed reducer generally comprises two planet rows, i.e. primary planet row and secondary planet row.Two planet rows include planet wheel, planet carrier, planet axis and sun gear.Planet carrier is a kind of frame-like structures, and the mounting hole of framework both sides is concentric, and size is also identical, plays a part to support planet wheel.The back shaft (planet axis) of planet wheel is just arranged on the mounting hole of planet carrier, and planet wheel quantity and the mounting hole quantity on planet carrier, planet axis quantity are identical; Several planet wheel specifications on same planet carrier are identical.Planet carrier can as revolving part, namely planet wheels rotation and rotate, the planet carrier on such as primary planet row; Planet carrier also can be stationary components, the planet carrier on such as secondary planet row.Speed reducer also comprises ring gear, and at present, the ring gear of speed reducer comprises the secondary gear ring arranged upper planet wheel with secondary planet and engage, and arranges with primary planet the primary annulus that upper planet wheel engages.Primary annulus is fastened on the inside of secondary gear ring by the fastening piece such as bolt, bearing pin.
The transmission of power order of above-mentioned speed reducer is: power intake-one-level sun gear-primary planet wheel-primary planet carrier-secondary solar gear-secondary planet wheel-secondary ring gear-clutch end.
There is following technical problem in the structure of above-mentioned speed reducer: one-level ring gear is placed in the inside of secondary ring gear, need take larger space, makes the volume of whole speed reducer larger; And fixed by the fastening piece such as bolt, bearing pin between secondary gear ring and one-level ring gear, fastening reliability is lower, and kinetic equation loss is comparatively large, reduces transmission efficiency.
In view of this, how improving the annular gear structure of speed reducer, to reduce the space taken, is those skilled in the art's technical problems urgently to be resolved hurrily.
Summary of the invention
Object of the present invention is for providing a kind of speed reducer, and primary planet row and the secondary planet row of this speed reducer share a ring gear, and compact structure, takies less complete machine space.
To achieve the object of the present invention, speed reducer provided by the invention, comprise primary planet row and secondary planet row, primary planet wheel, primary planet carrier, primary planet axle, one-level sun gear are drawn together in described primary planet package; Secondary planet wheel, secondary planet frame, secondary planet axle, secondary solar gear are drawn together in described secondary planet package; Speed reducer also comprises clutch end and power intake, described one-level sun gear is connected with described power intake, it is characterized in that, speed reducer also comprises the ring gear be connected with clutch end, described ring gear is provided with one-level internal tooth and secondary internal tooth, described one-level internal tooth is taken turns with described primary planet and is engaged, and described secondary internal tooth is taken turns with described secondary planet and engaged;
Described clutch end is the ring-type output rack fixing with described ring gear, described output rack offers the lubricating oil duct being communicated with described primary planet row and described secondary planet row.
Preferably, described power intake connects spline housing, and one-level sun gear described in described spline housing overcoat, described spline housing arranges internal spline, and described one-level sun gear has the external splines coordinated with this internal spline.
Preferably, described speed reducer is also provided with friction plate group, and described friction plate group comprises the rotating plate and driven plate that match, and described rotating plate is connected with described spline housing; Described driven plate is relative with speed reducer body fixing;
Described speed reducer is also provided with piston, spring, and the braking oil pocket be communicated with speed reducer working oil path; The body of the relative speed reducer in one end of described spring is fixed, and one end pushes against piston in described friction plate group; Described piston has the compression face towards described friction plate group, and described braking oil pocket is positioned at described compression face place.
Preferably, described power intake penetrates to drive described one-level sun gear from the center hole of described secondary planet frame; Described spline housing is located in described secondary planet frame center hole, and described friction plate group is arranged between the inwall of described spline housing and described secondary planet frame.
Preferably, also comprise ring-type pressing plate, described ring-type pressing plate is placed in the center hole of described secondary planet frame, and the periphery wall of described ring-type pressing plate and the inwall of described secondary planet frame are fixed, and one end of described spring contacts at described ring-type pressing plate, the other end is conflicted described piston.
Preferably, also comprise ring shaped retainers, the inwall of described secondary planet frame is provided with annular recess, and described ring shaped retainers is embedded in described annular recess; Described ring shaped retainers and described spring are positioned at the both sides of described ring-type pressing plate, and described ring shaped retainers is adjacent to described ring-type pressing plate.
Preferably, the inwall of described secondary planet frame forms the step surface protruded towards inner chamber, described piston has the step surface relative with this step surface, the periphery wall of described piston and the inner circle wall of described secondary planet frame seal, the step surface of described piston is described compression face, forms described braking oil pocket between the step surface of described piston and the step surface of described secondary planet frame inwall.
Preferably, described secondary planet frame and secondary planet axle are monolithic construction.
Preferably, described secondary planet frame has the large footpath section and path section that connect and form periphery step surface, and described secondary planet axle connects with described path section; Secondary planet axle described in described ring gear overcoat, path section described in described output rack overcoat, and one end of described output rack and described ring gear are fixed, the end face of the other end and the step surface of described large footpath section seal.
Preferably, end face and the described secondary planet frame large footpath section end face of described output rack are equipped with groove, and two groove notches form annular seal chamber relatively, are equipped with seal ring, floating sealing ring in groove described in two; The axial end gluing, sealing of floating sealing ring described in two, floating sealing ring described in two all offers circular groove on the perisporium of speed reducer periphery, and circular groove described in two is obliquely installed relative to the sealing surface of floating sealing ring described in two, and described in two, the notch of circular groove is opposing; Described seal ring is squeezed between the cell wall of the circular groove of described floating sealing ring and the described groove of correspondence.
Preferably, be also provided with bearing, the inner ring overcoat of described bearing is also fixed on the periphery wall of described secondary planet axle, and the outer ring of described bearing is described secondary planet wheel.
Primary planet row and secondary planet row are shared an integral inner gear ring by the speed reducer in this invention, the scheme in secondary gear ring is placed on compared to primary annulus of the prior art, annular gear structure can be simplified, make the layout of ring gear on speed reducer more compact, reduce the space taking complete machine, thus reduce the volume of speed reducer, make it be tending towards miniaturization and be convenient to install, meet consumers' demand, expand Applicable scope; And the reliability of integral inner gear ring is high, and power loss is little, contribute to improving transmission efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of speed reducer provided by the present invention;
Fig. 2 is that in Fig. 1, primary planet arranges the linkage structure schematic diagram with secondary solar gear, ring gear;
Fig. 3 is the structural representation of secondary planet row and ring gear in Fig. 1;
Fig. 4 is the structural representation that in Fig. 1, secondary planet frame arranges Parking Brake;
Fig. 5 is the structural representation of secondary planet frame mechanism in Fig. 1;
Fig. 6 is the assembly structure schematic diagram of secondary planet axle and secondary planet wheel in Fig. 3.
In Fig. 1-6:
1 lubricating oil duct, 2 ring gears, 21 one-level internal tooths, 22 secondary internal tooths, 3 primary planet rows, 31 primary planet wheels, 32 primary planet carriers, 33 one-level sun gears, 34 primary planet axles, 4 secondary planet rows, 41 secondary planet wheels, 42 bearings, 43 secondary planet frame mechanisms, 431 first floating sealing bases, 432 secondary planet framves, 433 secondary planet axles, 44 secondary solar gears, 5 Parking Brakes, 50 braking oil ducts, 51 ring shaped retainers, 52 ring-type pressing plates, 53 pistons, 54 driven plates, 55 rotating plates, 56 first seal rings, 57 springs, 58 second seal rings, 59 braking oil pockets, 61O shape is enclosed, 62 floating sealing rings, 7 spline housings, 8 bearing pack, 9 output racks, 91 second floating sealing bases
Embodiment
Core of the present invention is for providing a kind of speed reducer, and primary planet row and the secondary planet row of this speed reducer share a ring gear, and compact structure, takies less complete machine space.
In order to make those skilled in the art understand technological scheme of the present invention better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to the structural representation that Fig. 1-3, Fig. 1 is a kind of embodiment of speed reducer provided by the present invention; Fig. 2 is that in Fig. 1, primary planet arranges the linkage structure schematic diagram with secondary solar gear, ring gear; Fig. 3 is the structural representation of secondary planet row and ring gear in Fig. 1.
Speed reducer in this embodiment, comprise primary planet row 3 and secondary planet row 4, primary planet row 3 comprises primary planet wheel 31, primary planet carrier 32, primary planet axle 34, one-level sun gear 33, and wherein, the external tooth of primary planet wheel 31 engages with the external tooth of one-level sun gear 33; Secondary planet row 4 comprises secondary planet wheel 41, secondary planet frame 432, secondary planet axle 433, secondary solar gear 44, and secondary planet is taken turns 41 external tooths and engaged with secondary solar gear 44 external tooth, and secondary solar gear 44 is fixed with primary planet carrier 32, as shown in Figure 2.
Speed reducer also comprises clutch end and power intake, and one-level sun gear 33 is connected with power intake, and under power drive, one-level sun gear 33 drives primary planet wheel 31 and primary planet carrier 32 to rotate.Speed reducer also comprises the ring gear 2 be connected with clutch end, and ring gear 2 is provided with one-level internal tooth 21 and secondary internal tooth 22, and the external tooth that one-level internal tooth 21 takes turns 31 with primary planet engages, and the external tooth that secondary internal tooth 22 takes turns 41 with secondary planet engages.
As can be seen from Figure 1, clutch end in this embodiment is the output rack 9 fixing with ring gear 2, one-level sun gear 33 drives primary planet to take turns 31 and rotates, primary planet wheel 31 revolves round the sun along ring gear 2 and drives primary planet carrier 32 rotation, primary planet carrier 32 drives secondary solar gear 44 to rotate, and then drive secondary planet wheel 44 to rotate, finally drive ring gear 2 and output rack 9 to rotate.Then the power transfer path of this speed reducer is: one-level sun gear 33-primary planet wheel 31-primary planet carrier 32-secondary solar gear 44-secondary planet wheel 41-ring gear 2-output rack 9.
In this embodiment, primary planet row 3 and secondary planet row 4 are shared an integral inner gear ring 2, the scheme in secondary gear ring is placed on compared to primary annulus of the prior art, ring gear 2 structure can be simplified, make the layout of ring gear 2 on speed reducer more compact, reduce the space taking complete machine, thus reduce the volume of speed reducer, make it be tending towards miniaturization to be convenient to install, meet consumers' demand, expand Applicable scope; And the reliability of integral inner gear ring 2 is high, and power loss is little, contribute to improving transmission efficiency.
Further, the power intake of speed reducer can be connected with one-level sun gear 33 by spline housing 7.As shown in Figure 1, spline housing 7 overcoat one-level sun gear 33, spline housing 7 arranges internal spline, and one-level sun gear 33 has the external splines coordinated with this internal spline.Spline housing 7 is convenient to the transmission of power of power intake to one-level sun gear 33.
On this basis, please refer to Fig. 4, Fig. 4 is the structural representation that in Fig. 1, secondary planet frame arranges Parking Brake.
This Parking Brake 5 mainly comprises friction plate group, piston 53, spring 57, braking oil pocket 59.Friction plate group comprises the rotating plate 55 and driven plate 54 that match, and when rotating plate 55 and driven plate 54 compress, the rubbing surface of the two produces frictional force, and realize braking function by this frictional force, when rotating plate 55 and driven plate 54 unclamp, the two is separated from each other.Wherein, rotating plate 55 is connected with the spline housing 7 on one-level sun gear 33; Driven plate 54 is relative with speed reducer body fixing, and in Fig. 3, driven plate 54 relatively secondary planet frame 432 is fixed, and secondary planet frame 432 is fixed on speed reducer body.The body of the relative speed reducer in one end of the spring 57 of Parking Brake 5 is fixed, the other end pushes against piston 53 in friction plate group, namely the elastic force of spring 57 is utilized to be pressed in friction plate group by piston 53, and then compress rotating plate 55 and driven plate 54, rotating plate 55 cannot rotate, and then spline housing 7 also cannot be rotated, i.e. unpowered output, thus realize the parking braking function of speed reducer.In addition, braking oil pocket 59 is communicated with the working oil path of speed reducer, then, during speed reducer work, working oil path provides high pressure oil, and braking oil pocket 59 is communicated with high-pressure oil passage, when speed reducer is shut down, and working oil path oil return pressure release, the also correspondingly oil return pressure release of braking oil pocket 59; And piston 53 has the compression face towards friction plate group, braking oil pocket 59 is positioned at compression face place, then braking oil pocket 59 internal pressure oil, to act on the pressure direction of piston 53 contrary with the elastic force direction of spring 57.
The working principle of this Parking Brake 5 is as follows: when speed reducer works, high pressure oil is passed in braking oil pocket 59, high pressure oil promotes piston 53 and overcomes spring 57 elastic force and move to left, namely cancel piston 53 and act on impacting force in friction plate group, rotating plate 55 is separated with driven plate 54, spline housing 7 can rotate, and the power of power intake can be passed to one-level sun gear 33 by spline housing 7, and then according to transmission of power sequence delivery; When speed reducer is shut down, braking oil pocket 59 oil return pressure release, spring 57 resets; promote piston 53 to move to right, to make piston 53 pressing friction sheet group, rotating plate 55 and driven plate 54 are fitted and fixed with; spline housing 7 is fixed relative to speed reducer body, cannot continue to rotate, and reaches the effect of braking.
This Parking Brake 5 visible can realize braking automatically by the working procedure of speed reducer self, without the need to arranging parking braking parts specially, also without the need to independent manipulation, decreasing complete machine number of components, reducing complete machine cost.
In above-described embodiment, the center hole that power intake can arrange the planet carrier of 4 from secondary planet penetrates the one-level sun gear 33 driving primary planet to arrange 3, as shown in Fig. 1,4, spline housing 7 is located in secondary planet frame 432 center hole, one-level sun gear 33 one end is positioned at secondary planet frame 432, and the other end runs through primary planet carrier 32.During design motivation input end input mode like this, friction plate group can be arranged between the inwall of spline housing 7 and secondary planet frame 432, and secondary planet frame 432 and speed reducer body are fixed, and is fixed by the inwall of driven plate 54 with secondary planet frame 432; Parking Brake 5 parts such as piston 53, spring 57 also can correspondingly be placed in the center hole of secondary planet frame 432.Then this kind of structure relatively easily achieves the installation of each parts of Parking Brake 5, and each parts of Parking Brake 5 can be placed in secondary planet frame 432 inner, under the prerequisite not taking complete machine space, be provided with Parking Brake 5.Can expect, power intake is arranged 3 side inputs from primary planet and is also fine, and from Fig. 1, need the right side each for Parking Brake 5 parts being located at speed reducer, obviously, the space availability ratio of this kind of set-up mode is lower.
On this basis, can ring-type pressing plate 52 be set further, conflicts for spring 57 and locate.Spring 57 is when compressing piston 53, the relative speed reducer body in one end is needed to fix, then now, can ring-type pressing plate 52 be placed in secondary planet frame 432, and the inwall of the periphery wall of ring-type pressing plate 52 and secondary planet frame 432 is fixed, and one end of spring 57 contacts at ring-type pressing plate 52, the other end conflict piston 53, namely spring 57 is placed between ring-type pressing plate 52 and piston 53.As can be seen from Fig. 1,4, piston 53 offers the groove of notch towards ring-type pressing plate 52, this groove and ring-type pressing plate 52 define a spring chamber, for putting spring 57.
In order to improve fixing, can also arrange ring shaped retainers 51, as shown in Figure 4, the inwall of secondary planet frame 432 is provided with annular recess, and ring shaped retainers 51 is embedded in annular recess, then ring shaped retainers 51 can be firmly fixed in secondary planet frame 432.In addition, this ring shaped retainers 51 and spring 57 are positioned at the both sides of ring-type pressing plate 52, and ring shaped retainers 51 is adjacent to ring-type pressing plate 52.High pressure oil overcomes spring 57 elastic force when piston 53 being pushed into ring-type pressing plate 52 place, and ring shaped retainers 51 and ring-type pressing plate 52 can play the effect of support piston 53 jointly, avoid pressure excessive damage ring-type pressing plate 52.
Can continue with reference to figure 4, the inwall of secondary planet frame 432 can process the step surface protruded towards its inner chamber, piston 53 can have the step surface relative with this step surface, then the step surface of piston 53 is compression face, the periphery wall of piston 53 and the inner circle wall of secondary planet frame 432 seal, in Fig. 4, sealed by the first seal ring 56 and the second seal ring 58, then can be formed between the step surface of piston 53 and the step surface of secondary planet frame 432 inwall and brake oil pocket 59.The set-up mode of this kind of braking oil pocket 59 is comparatively simple, and the action effect of high pressure oil is higher.Can expect, the periphery wall of piston 53 arranges annular groove, the inner circle wall of annular groove and secondary planet frame 432 forms braking oil pocket 59 and is also fine, but this kind of mode is subject to the restriction of piston 53 stroke, and sealing effect and high pressure oil action effect are inferior to this embodiment.Correspondingly, braking oil duct 50 can be set on secondary planet frame 432, to be introduced by the high pressure oil of speed reducer working oil path in braking oil pocket 59 also for the hydraulic oil oil return in braking oil pocket 59.
For the various embodiments described above, secondary planet frame 432 and secondary planet axle 433 can be monolithic constructions, please refer to Fig. 5, Fig. 5 is the structural representation of secondary planet frame mechanism in Fig. 1, can find out, secondary planet frame mechanism 43 is the structure after secondary planet frame 432 and secondary planet axle 433 form one.All-in-one-piece secondary planet frame 432 and secondary planet axle 433 can be formed by forging mode, fine finishing is carried out after forging, make all-in-one-piece secondary planet frame mechanism 43 possess higher rigidity and machining accuracy, split-type structural in prior art, Assembly of the parts error can be eliminated.
For the various embodiments described above, clutch end can be specially the ring-type output rack 9 fixing with ring gear 2, and output rack 9 offers the lubricating oil duct 1 being communicated with primary planet row 3 and secondary planet row 4, as shown in Figure 1.Output rack 9 rotates and outputting power under the drive of ring gear 2, in this embodiment, is also provided with bearing pack 8 between output rack 9 and secondary planet frame 432, so that output rack 9 rotates.Known, bearing pack 8, gear etc. all need lubrication, after this lubricating oil duct 1 is set, can to the appropriate fluid of disposable injection in lubricating oil duct 1, by output rack 9, gear, the isostructural rotational agitation of planet carrier, fluid can be full of in speed reducer, and the part that need lubricate can be immersed in fluid, reaches the effect of immersion oil selflubricating.Visible, after output rack 9 arranges lubricating oil duct 1, without the need to reserving the special lubricating structure of special spatial placement, speed reducer structure being simplified, reduces and take up room.
For ensureing the sealability of speed reducer, secondary planet frame 432 can be made to have connect the large footpath section and path section that form periphery step surface, as shown in Figure 1, secondary planet axle 433 connects with path section, and is an entirety; Ring gear 2 overcoat secondary planet axle 433, is provided with secondary planet wheel 41 therebetween.The path section of output rack 9 overcoat secondary planet frame 432, and one end of output rack 9 and ring gear 2 are fixed, the end face of the other end and the step surface of large footpath section seal.Design like this, makes speed reducer compact overall structure.
The sealing means of output rack 9 and secondary planet frame 432 specifically can be as shown in Figure 3.The end face of output rack 9 and secondary planet frame 432 large footpath section end face are respectively equipped with the second floating sealing base 91 and the first floating sealing base 431, in Fig. 3, second floating sealing base 91 and the first floating sealing base 431 are equipped with groove, and the notch of groove is relative, two grooves combine and form annular seal chamber, two O shape circles 61 are provided with in Seal cage, two floating sealing rings 62, a pair O shape circle 61 and floating sealing ring 62 are located in the groove of output rack 9 end face accordingly, another is located in the groove of secondary planet frame 432 end face to O shape circle 61 and floating sealing ring 62 correspondence, certainly, be not limited to arrange O shape circle 61 herein, also can be the seal ring of common other types.Floating sealing ring 62 can be metalwork.The axial end of two floating sealing rings 62 fits (speed reducer axially docking and fit) and to seal, faying surface is sealing surface, two floating sealing rings 62 all offer circular groove on the perisporium of speed reducer periphery, two circular grooves are arranged relative to the gluing, sealing face tilt of two floating sealing rings 62, and the notch of two circular grooves is opposing; Two O shape circles 61 are placed in the circular groove of two floating sealing rings 62 respectively, and the cross section of Fig. 3 intermediate annular groove possesses certain radian, to put floating sealing ring 62.An O shape circle 61 is squeezed between the cell wall of the groove of corresponding floating sealing ring 62 circular groove and the first floating sealing base 431, and another O shape circle 61 is squeezed between the cell wall of the groove of corresponding floating sealing ring 62 circular groove and the second floating sealing base 91.Because two circular grooves are obliquely installed and notch is opposing, the elastic energy that O shape is enclosed 61 compressive deformations and contained can produce to floating sealing ring 62 active force extruded to gluing, sealing face, make two floating sealing rings 62 be in fit-state all the time, guarantee that output rack 9 and secondary planet frame 432 form good mechanical end face seal.
Output rack 9 and secondary planet frame 432 also can adopt traditional outside framework oil seal structure to seal, but the structure of outside framework oil seal requires higher to coaxality, and when taking above-mentioned sealing means, O shape is enclosed the bias of the elasticity energy automatic centering compensating shaft of 61 or is misaligned, thus do not affect by machining accuracy, among work without the need to people for safeguarding, long-acting sealing effect can be kept.
Please continue to refer to the assembly structure schematic diagram that Fig. 6, Fig. 6 are secondary planet axle and secondary planet wheel in Fig. 3.In this embodiment, be provided with bearing 42, the inner ring overcoat of bearing 42 is also fixed on the periphery wall of secondary planet axle 433, and the outer ring of bearing 42 is secondary planet wheel 41.Be equivalent to the bearing 42 be provided with between secondary planet wheel 41 and secondary planet axle 433 without outer ring, namely secondary planet wheel 41 act as the outer ring of bearing 42, be integrated with bearing 42, as a part for bearing 42, compared with traditional solid box, the bearing 42 arranging this structure can reduce the space shared by bearing 42 outer ring, make structure more compact, reduce volume, and, because secondary planet wheel 41 is without the need to reserving the space of putting for outer ring, thus improve the intensity of planet wheel.
Above a kind of speed reducer provided by the present invention is described in detail.Apply specific case herein to set forth principle of the present invention and mode of execution, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (11)
1. a speed reducer, comprise primary planet row and secondary planet row, primary planet wheel, primary planet carrier, primary planet axle, one-level sun gear are drawn together in described primary planet package; Secondary planet wheel, secondary planet frame, secondary planet axle, secondary solar gear are drawn together in described secondary planet package; Speed reducer also comprises clutch end and power intake, described one-level sun gear is connected with described power intake, it is characterized in that, speed reducer also comprises the ring gear be connected with clutch end, described ring gear is provided with one-level internal tooth and secondary internal tooth, described one-level internal tooth is taken turns with described primary planet and is engaged, and described secondary internal tooth is taken turns with described secondary planet and engaged;
Described clutch end is the ring-type output rack fixing with described ring gear, described output rack offers the lubricating oil duct being communicated with described primary planet row and described secondary planet row.
2. speed reducer as claimed in claim 1, is characterized in that, described power intake connects spline housing, and one-level sun gear described in described spline housing overcoat, described spline housing arranges internal spline, and described one-level sun gear has the external splines coordinated with this internal spline.
3. speed reducer as claimed in claim 2, it is characterized in that, described speed reducer is also provided with friction plate group, and described friction plate group comprises the rotating plate and driven plate that match, and described rotating plate is connected with described spline housing; Described driven plate is relative with speed reducer body fixing;
Described speed reducer is also provided with piston, spring, and the braking oil pocket be communicated with speed reducer working oil path; The body of the relative speed reducer in one end of described spring is fixed, and one end pushes against piston in described friction plate group; Described piston has the compression face towards described friction plate group, and described braking oil pocket is positioned at described compression face place.
4. speed reducer as claimed in claim 3, it is characterized in that, described power intake penetrates to drive described one-level sun gear from the center hole of described secondary planet frame; Described spline housing is located in described secondary planet frame center hole, and described friction plate group is arranged between the inwall of described spline housing and described secondary planet frame.
5. speed reducer as claimed in claim 4, it is characterized in that, also comprise ring-type pressing plate, described ring-type pressing plate is placed in the center hole of described secondary planet frame, the periphery wall of described ring-type pressing plate and the inwall of described secondary planet frame are fixed, and one end of described spring contacts at described ring-type pressing plate, the other end is conflicted described piston.
6. speed reducer as claimed in claim 5, it is characterized in that, also comprise ring shaped retainers, the inwall of described secondary planet frame is provided with annular recess, and described ring shaped retainers is embedded in described annular recess; Described ring shaped retainers and described spring are positioned at the both sides of described ring-type pressing plate, and described ring shaped retainers is adjacent to described ring-type pressing plate.
7. speed reducer as claimed in claim 4, it is characterized in that, the inwall of described secondary planet frame forms the step surface protruded towards inner chamber, described piston has the step surface relative with this step surface, the periphery wall of described piston and the inner circle wall of described secondary planet frame seal, the step surface of described piston is described compression face, forms described braking oil pocket between the step surface of described piston and the step surface of described secondary planet frame inwall.
8. the speed reducer as described in any one of claim 1-7, is characterized in that, described secondary planet frame and secondary planet axle are monolithic construction.
9. speed reducer as claimed in claim 1, is characterized in that, described secondary planet frame has the large footpath section and path section that connect and form periphery step surface, and described secondary planet axle connects with described path section; Secondary planet axle described in described ring gear overcoat, path section described in described output rack overcoat, and one end of described output rack and described ring gear are fixed, the end face of the other end and the step surface of described large footpath section seal.
10. speed reducer as claimed in claim 9, it is characterized in that, end face and the described secondary planet frame large footpath section end face of described output rack are equipped with groove, and two groove notches form annular seal chamber relatively, are equipped with seal ring, floating sealing ring in groove described in two; The axial end gluing, sealing of floating sealing ring described in two, floating sealing ring described in two all offers circular groove on the perisporium of speed reducer periphery, and circular groove described in two is arranged relative to the gluing, sealing face tilt of floating sealing ring described in two, and described in two, the notch of circular groove is opposing; Described seal ring is squeezed between the cell wall of the circular groove of described floating sealing ring and the described groove of correspondence.
11. speed reducers as described in any one of claim 1-7, is characterized in that, be also provided with bearing, and the inner ring overcoat of described bearing is also fixed on the periphery wall of described secondary planet axle, and the outer ring of described bearing is described secondary planet wheel.
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| CN201210258630.XA CN102748432B (en) | 2012-07-24 | 2012-07-24 | A kind of speed reducer |
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| CN201210258630.XA CN102748432B (en) | 2012-07-24 | 2012-07-24 | A kind of speed reducer |
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| CN102748432B true CN102748432B (en) | 2016-01-27 |
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| CN103307229A (en) * | 2013-06-28 | 2013-09-18 | 江苏赫夫特齿轮制造有限公司 | Annular gear structure |
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| CN106678285A (en) * | 2017-02-23 | 2017-05-17 | 徐州徐工传动科技有限公司 | Normally closed walking speed reducer |
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| CN111674259B (en) * | 2019-03-11 | 2024-04-12 | 舍弗勒技术股份两合公司 | Electric axle for a motor vehicle |
| CN110925393B (en) * | 2019-12-25 | 2023-01-31 | 柳工柳州传动件有限公司 | Speed reduction device and loading and unloading machine |
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| AU2003246518A1 (en) * | 2002-05-31 | 2003-12-19 | Klaus Plath | Transmission device comprising an eccentric power transmission axle that is disposed on the bearing axle |
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|---|---|---|---|---|
| DE10125148A1 (en) * | 2001-04-23 | 2002-10-24 | Wittenstein Ag | Planetary gear has drive and driven shaft connected by element, housing part, annular chamber containing two sealing elements |
| CN2489145Y (en) * | 2001-06-12 | 2002-05-01 | 舟山市行星减速机制造有限公司 | Hydraulic motor driven speed reducer |
| CN201535345U (en) * | 2009-12-02 | 2010-07-28 | 济南液压泵有限责任公司 | Planetary gear speed reducer |
| CN101956790A (en) * | 2010-05-28 | 2011-01-26 | 徐州圣邦机械有限公司 | Roller-speed reducer assembly for automobile hoist |
| CN202790340U (en) * | 2012-07-24 | 2013-03-13 | 徐工集团工程机械股份有限公司科技分公司 | Speed reducer |
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| CN102748432A (en) | 2012-10-24 |
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