CN104088974A - Winch planetary transmission and speed regulation modes for same - Google Patents
Winch planetary transmission and speed regulation modes for same Download PDFInfo
- Publication number
- CN104088974A CN104088974A CN201410288200.1A CN201410288200A CN104088974A CN 104088974 A CN104088974 A CN 104088974A CN 201410288200 A CN201410288200 A CN 201410288200A CN 104088974 A CN104088974 A CN 104088974A
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- China
- Prior art keywords
- clutch
- order
- gear
- level
- planet carrier
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Classifications
-
- 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
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
- F16H3/46—Gearings having only two central gears, connected by orbital gears
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/02—Driving gear
- B66D1/14—Power transmissions between power sources and drums or barrels
- B66D1/22—Planetary or differential gearings, i.e. with planet gears having movable axes of rotation
- B66D1/225—Planetary or differential gearings, i.e. with planet gears having movable axes of rotation variable ratio or reversing gearing
-
- 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
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
- F16H2200/0034—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising two forward speeds
-
- 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
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/2002—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears
- F16H2200/2007—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with two sets of orbital gears
-
- 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
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/203—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes
- F16H2200/2035—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes with two engaging means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structure Of Transmissions (AREA)
Abstract
The invention discloses a winch planetary transmission and speed regulation modes for the same, which belong to the technical field of mechanical transmission. The planetary transmission comprises a rack, a first-stage planetary gear train, a second planetary gear train, a clutch I and a clutch II, wherein the four speed regulation modes of gear 1, gear 2, brake and neutral gear are realized by the planetary transmission through the opening and closing of the clutch I and the clutch II. According to the winch planetary transmission provided by the invention, the two clutches are axially distributed, an inner gear ring is arranged in a winch drum and integrally connected by a bolt, thus greatly reducing the radial dimensions of the planetary transmission; the whole planetary transmission is arranged in the drum, thus solving the technical problems of large size and complex structure of the traditional planetary transmission.
Description
Technical field
The invention belongs to mechanical transmissioning technology field, relate to the multiple speed-regulating mode of a kind of winch planetary transmission and this planetary transmission.
Background technique
Winch is called again winch, is to use reel lay winding wire ropes or chain to promote or to draw the small-sized crane gear of weight.Winch can use separately, also can be used as lifting, build the road and the machinery such as mine hoisting in constituent elements, because of simple to operate, wiring amount is large, the convenient extensive use of dislocation.Along with the use of winch in different field and working environment also requires more and more higher to its adaptability.The winch using in prior art includes: fast, at a slow speed, the polytype such as large-tonnage.Although the type difference of winch, the structure of these winches is but similar, mainly comprises power plant and gearbox.
Domestic winch speed changing box three kinds of transmission modes, that is: the modes that column gear transmission, Planetary Gear Transmission or cylinder combine with Planetary Gear Transmission of adopting more.Column gear transmission is a kind of gear transmission for transmitting moving force and motion between parallel axes.Planetary Gear Transmission is that the axis of one or more gears is around the rotating gear transmission of fixed axis of another gear.Compared with column gear transmission, Planetary Gear Transmission has that volume is little, bearing capacity is large, lightweight, gear range large and the plurality of advantages such as stable working, has the trend that replaces column gear transmission.Planetary transmission (below all referred to as planetary transmission) is the gearbox of realizing speed change with planetary gear mechanism, be conventionally contained in torque converter after, jointly form hydraulic automatic gearbox.
At present, planetary transmission is bulky, complex structure, and the diameter of niggerhead is less, planetary transmission can not be arranged on to reel inside, also need to take in addition installing space, conventionally adopt planetary transmission output ring gear and niggerhead in bolted mode, transmit output torque.Therefore, existing planetary transmission can not effectively utilize niggerhead inner space, certainly will cause winch volume to become large, has also increased the cost of manufacturing planetary transmission simultaneously.
Summary of the invention
Make full use of niggerhead inner space for solving, effectively dwindle winch planetary transmission volume, it simplified the structure and reduce the technical problem of manufacture cost, the invention provides the multiple speed-regulating mode of a kind of novel winch planetary transmission and this planetary transmission.
A kind of winch planetary transmission, comprises frame, first order planetary gear train, second level planetary gear train, clutch one, clutch two.
Described first order planetary gear train comprises first order sun gear, first order planet wheel, first order planet carrier and ring gear.
First order sun gear engages with first order planet wheel, and first order planet wheel is connected with first order planet carrier shaft, and first order planet wheel is arranged on the inside of ring gear.
Described second level planetary gear train comprises second level sun gear, second level planet wheel, second level planet carrier, ring gear.
Second level sun gear engages with second level planet wheel, and the planet wheel second level, second level planet carrier shaft connects, and second level planet wheel is arranged on the inside of ring gear.
One end of described clutch one is connected with first order planet carrier, and the other end of clutch one is connected with frame.
One end of described clutch two is connected with first order planet carrier, and the other end of clutch two is connected with second level sun gear.
Described second level planet carrier and frame are fixedly connected and connect as one.
Described first order sun gear is as the power input end of this planetary transmission.Described ring gear is fixed on the inside of niggerhead and the power take-off as this planetary transmission.
As preferably, described winch planetary transmission also comprises bearing one, bearing two, and described bearing one, bearing two are arranged on respectively between ring gear and frame.
As preferably, clutch one and clutch two are wet friction slice clutch.
The technological scheme that the present invention takes further comprises:
A speed-regulating mode for winch planetary transmission, by regulating the separation of clutch one, clutch two with closed, realizes braking, neutral, speed ratio i
1gear 1 and speed ratio i
22 four kinds of patterns of gear.
1) speed ratio i
1gear 1 pattern
Clutch one closure, first order planet carrier and frame are fixedly connected; Clutch two separates, and first order planet carrier separates with second level sun gear; Be now fixed shaft gear train, speed ratio i
1for the ring gear number of teeth and the ratio of the first order sun gear number of teeth; Power inputs to after first order sun gear, is passed to ring gear through first order planet wheel, and having realized speed ratio is i
1ring gear 4 export.
2) speed ratio i
2gear 2 patterns
Clutch one separates, and first order planet carrier separates with frame; Clutch two closures, first order planet carrier is connected with second level sun gear, and second level planet carrier and frame are connected and fixed; The power that first order sun gear imports into, part power is passed to ring gear after first order planet wheel slows down, part power is imported into second level sun gear by first order planet carrier, after second level planet wheel slows down, is passed to ring gear, and power collaborates output on ring gear; Speed ratio i under this pattern
2for ring gear output speed now and the ratio of first order sun gear input speed.
3) braking mode
Clutch one closure, first order planet carrier and frame are fixedly connected; Clutch two closures, first order planet carrier and second level sun gear are fixedly connected; Be now braking state, ring gear maintains static.
4) neutral mode
Clutch one separates, and first order planet carrier separates with frame; Clutch two separates, and first order planet carrier separates with second level sun gear; Be now neutral position state, the idle running of first order planet carrier, ring gear is output power not.
Advantage of the present invention is:
In order to meet the technical requirements in the high-power little space of winch, the present invention improves the planetary gear transmission mechanism of winch, has designed a kind of novel winch planetary transmission.This planetary transmission comprises two-stage planet and two clutches.Two clutches are distributed in axial position, have reduced greatly the radial dimension of planetary transmission, and the diameter of whole planetary transmission is reduced, and are reduced to and can be arranged on reel inside.In addition, ring gear and the niggerhead of this planetary transmission unite two into one, simple and compact for structure, have saved greatly the space of planetary transmission and winch, have reduced manufacture cost.The present invention, by the switching integrated mode of switch clutch, can regulate transmission speed ratio, realizes gear 1, gear 2, braking, four kinds of patterns of neutral, changes the output speed of ring gear.
Below with reference to drawings and Examples, the present invention is described in further details.
Brief description of the drawings
Fig. 1 is the structural representation of winch planetary transmission.
Description of reference numerals: 1, first order sun gear; 2, second level planet carrier; 3, bearing two; 4, ring gear; 5, second level planet wheel; 6, second level sun gear; 7, clutch two; 8, first order planet carrier; 9, first order planet wheel; 10, clutch one; 11, frame; 12, bearing one.
Embodiment
Embodiment 1:
Existing planetary transmission complex structure, bulky, is arranged on winch and will causes the volume of complete equipment larger, is obviously not suitable with the technical requirements of high-power small volume, has also increased manufacture cost simultaneously.The present invention is directed to this technological deficiency, designed a kind of Novel winch planetary transmission simple in structure.
As shown in Figure 1, described planetary transmission comprises frame 11, first order planetary gear train, second level planetary gear train, clutch 1, clutch 27.Wherein, first order planetary gear train is made up of first order sun gear 1, first order planet wheel 9, first order planet carrier 8 and ring gear 4.First order sun gear 1 engages with first order planet wheel 9.First order planet wheel 9 is connected with first order planet carrier 8 axles.First order planet wheel 9 engages with ring gear 4.Described second level planetary gear train is made up of second level sun gear 6, second level planet wheel 5, second level planet carrier 2 and ring gear 4.Second level sun gear 6 engages with second level planet wheel 5.Second level planet wheel 5 is connected with second level planet carrier 2 axles.Second level planet wheel 5 engages with ring gear 4.It should be noted that, first order planetary gear train and second level planetary gear train share a ring gear 4, and ring gear 4 is fixed on the inside of niggerhead, connect as one with bolt, be that ring gear 4 unites two into one with niggerhead, effectively utilized reel inner space, compact structure, has effectively reduced winch own vol simultaneously.
Further, described planetary transmission vertically position is also provided with clutch 1 and clutch 27, reduce greatly the radial dimension of this planetary transmission, whole planetary transmission diameter has been reduced, thereby whole planetary transmission is placed in to niggerhead inside.Clutch 1 is identical with the structural principle of clutch 27, is wet friction slice clutch.One end of clutch 1 is connected with first order planet carrier 8, and the other end of clutch 1 is connected with frame 11.The closure that regulates clutch 1 by oil pressure with separate, thereby the closure that realizes first order planet carrier 9 and frame 11 with separate.One end of described clutch 27 is connected with first order planet carrier 8, and the other end of clutch 27 is connected with second level sun gear 6.The closure that regulates clutch 27 by oil pressure with separate, thereby realize being connected and separating of first order planet carrier 8 and second level sun gear 6.It is emphasized that second level planet carrier 2 and frame 11 are fixedly connected integral.
In order to ensure the smooth rotation of ring gear 4, installation bearing 1, bearing 23 between ring gear 4 and frame 11.
The power input end of described planetary transmission is first order sun gear (1), and power take-off is ring gear (4).
Also it should be noted that, the conventional quantity of planet wheel can be 3,4 or 5, is being circumferentially planet wheel of the each distribution of 120 degree if select 3 planet wheels, and the structural representation of planetary transmission is exactly asymmetric; If select 4 planet wheels, i.e. planet wheel of the axial 90 each distributions of degree, the structural representation of planetary transmission is symmetrical.
Embodiment 2:
Described in embodiment 1, the working principle that realizes speed governing of planetary transmission is: at axial position, clutch 1 and clutch 27 are set, by regulating separating and closure of clutch 1 and clutch 27, realize braking, neutral, speed ratio i
1gear 1 and speed ratio i
22 four kinds of speed-regulating modes of gear.
Below the implementation procedure of each speed-regulating mode is described.
Pattern one: speed ratio i
1gear 1 pattern
Power is input to after the first order sun gear 1 of first order epicyclic train, clutch one 10 closures, and first order planet carrier 8 is fixedly connected with frame 11, clutch 27 separates, first order planet carrier 8 separates with second level sun gear 6, is now fixed shaft gear train, first order speed ratio i
1for the ratio of ring gear 4 numbers of teeth and first order sun gear 1 number of teeth, thus the power of first order sun gear 1, through speed ratio i
1after deceleration, be delivered to ring gear 4 through first order planet wheel 9, having realized ring gear 4, to export speed ratio be i
1rotating speed.In this pattern, because clutch 27 separates, first order planet carrier 8 separates with second level sun gear 6, and power is without second level planetary gear train.
Pattern two: speed ratio i
2gear 2 patterns
Clutch 1 separates, and now first order planet carrier 8 separates with frame 11, and first order planet carrier 8 is unfixing; Clutch 27 closures, first order planet carrier 8 is connected with second level sun gear 6, and second level planet carrier 2 is fixing, and this structure is two-stage planet transmission, is the common structure in winch kind equipment speed reducer.The power that first order sun gear 1 imports into, a part is delivered to ring gear 4 after first order planet wheel 9 slows down; Part power is passed to second level sun gear 6 by first order planet carrier 8, because second level planet carrier 2 is fixing, power is delivered to ring gear 4 after second level planet wheel 5 slows down, because first order planetary gear train, second level planetary gear train share a ring gear 4, power collaborates output on ring gear 4.Speed ratio i under this pattern
2for the ratio of ring gear (4) output speed and first order sun gear (1) input speed now.
Pattern three: braking mode
Clutch one 10 closures, first order planet carrier 8 is fixedly connected with frame 11, clutch 27 closures, first order planet carrier 8 is fixedly connected with second level sun gear 6, is now braking state, and ring gear 4 maintains static.Because because first order planetary gear train, second level planetary gear train share a ring gear 4, ring gear 4 is meshed with second level planet wheel 5, because first order planet carrier 8 and frame 11 are fixedly connected motionlessly, ring gear 4 maintains static again.Two clutch while closures are braking state.
Pattern four: neutral mode
Clutch 1 separates, and first order planet carrier 8 cannot not separate fixingly with frame 11, and clutch 27 separates, and first order planet carrier 8 separates with second level sun gear 6, and power does not enter second level planetary gear train.First order planet carrier 8 is unfixing, and ring gear 4 is fixed as one with reel, and with load, planet carrier 8 dallies, and not output power of ring gear 4 is neutral position state.
By reference to the accompanying drawings embodiments of the present invention are described above, but the present invention is not limited to above-mentioned mode of execution, in the ken that one skilled in the relevant art possesses, can also under the prerequisite that does not depart from aim of the present invention, makes a variety of changes.The parts that above-described embodiment does not describe in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not narration one by one.
Claims (4)
1. a winch planetary transmission, comprises frame (11), first order planetary gear train, second level planetary gear train, clutch one (10), clutch two (7);
Described first order planetary gear train comprises first order sun gear (1), first order planet wheel (9), first order planet carrier (8) and ring gear (4);
First order sun gear (1) engages with first order planet wheel (9), and first order planet wheel (9) is connected with first order planet carrier (8) axle, and first order planet wheel (9) is arranged on the inside of ring gear (4);
Described second level planetary gear train comprises second level sun gear (6), second level planet wheel (5), second level planet carrier (2), ring gear (4);
Second level sun gear (6) engages with second level planet wheel (5), and second level planet wheel (5) is connected with second level planet carrier (2) axle, and second level planet wheel (5) is arranged on the inside of ring gear (4);
One end of described clutch one (10) is connected with first order planet carrier (8), and the other end of clutch one (10) is connected with frame (11);
One end of described clutch two (7) is connected with first order planet carrier (8), and the other end of clutch two (7) is connected with second level sun gear (6);
Described second level planet carrier (2) is connected to one with frame (11);
Described first order sun gear (1) is as the power input end of this planetary transmission; Described ring gear (4) is fixed on the inside of niggerhead and the power take-off as this planetary transmission.
2. winch planetary transmission according to claim 1, is characterized in that: also comprise bearing one (12), bearing two (3), described bearing one (12), bearing two (3) are arranged on respectively between ring gear (4) and frame (11).
3. winch planetary transmission according to claim 1 and 2, is characterized in that: clutch one (10) and clutch two (7) are wet friction slice clutch.
4. a speed-regulating mode for winch planetary transmission, is characterized in that: by regulating the separation of clutch one (10), clutch two (7) with closed, realize braking, neutral, speed ratio i
1gear 1 and speed ratio i
22 four kinds of patterns of gear;
Speed ratio i
1gear 1 pattern
Clutch one (10) closure, first order planet carrier (8) is fixedly connected with frame (11); Clutch two (7) separates, and first order planet carrier (8) separates with second level sun gear (6); Be now fixed shaft gear train, speed ratio i
1for the ratio of ring gear (4) number of teeth and first order sun gear (1) number of teeth; Power inputs to after first order sun gear (1), is passed to ring gear (4) through first order planet wheel (9), and having realized speed ratio is i
1ring gear 4 export;
Speed ratio i
2gear 2 patterns
Clutch one (10) separates, and first order planet carrier (8) separates with frame (11); Clutch two (7) closures, first order planet carrier (8) is connected with second level sun gear (6), and second level planet carrier (2) is connected and fixed with frame (11); The power that first order sun gear (1) imports into, part power is passed to ring gear (4) after first order planet wheel (9) slows down, part power is imported into second level sun gear (6) by first order planet carrier (8), after second level planet wheel (5) slows down, be passed to ring gear (4), power is in ring gear (4) upper interflow output; Speed ratio i under this pattern
2for the ratio of ring gear (4) output speed and first order sun gear (1) input speed now;
Braking mode
Clutch one (10) closure, first order planet carrier (8) is fixedly connected with frame (11); Clutch two (7) closures, first order planet carrier (8) is fixedly connected with second level sun gear (6); Be now braking state, ring gear (4) maintains static;
Neutral mode
Clutch one (10) separates, and first order planet carrier (8) separates with frame (11); Clutch two (7) separates, and first order planet carrier (8) separates with second level sun gear (6); Be now neutral position state, first order planet carrier (8) idle running, not output power of ring gear (4).
Priority Applications (1)
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CN201410288200.1A CN104088974A (en) | 2014-06-25 | 2014-06-25 | Winch planetary transmission and speed regulation modes for same |
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CN201410288200.1A CN104088974A (en) | 2014-06-25 | 2014-06-25 | Winch planetary transmission and speed regulation modes for same |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104373519A (en) * | 2014-11-06 | 2015-02-25 | 南京星能传动机械有限责任公司 | Gear shift planetary reduction device |
CN104890496A (en) * | 2015-06-30 | 2015-09-09 | 天津清源电动车辆有限责任公司 | Hybrid power system, hybrid power vehicle and hybrid driving method |
CN104924889A (en) * | 2015-06-30 | 2015-09-23 | 天津清源电动车辆有限责任公司 | Hybrid power system, hybrid power vehicle and hybrid driving method |
CN105402334A (en) * | 2015-12-21 | 2016-03-16 | 江苏大学 | Four-gear mechanical automatic transmission power assembly system based on planetary gear mechanisms |
CN106744146A (en) * | 2016-12-29 | 2017-05-31 | 中国矿业大学 | A kind of elevator transmission device with anti-falling function |
CN107100965A (en) * | 2016-02-23 | 2017-08-29 | 舍弗勒技术股份两合公司 | The planetary gear manual transmission of high transmission ratio |
CN108313905A (en) * | 2018-03-14 | 2018-07-24 | 中国石油天然气集团有限公司 | The winch driving gear and winch of oil drilling |
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JPH04173693A (en) * | 1990-11-06 | 1992-06-22 | Toyota Autom Loom Works Ltd | Winch |
CN2466418Y (en) * | 2001-02-23 | 2001-12-19 | 西安石油勘探仪器总厂 | Planetary speed changer for petroleum logging winch |
CN2880777Y (en) * | 2006-01-19 | 2007-03-21 | 锦州凯信矿山机械有限公司 | Driving device for drum of winche |
CN201736790U (en) * | 2010-06-09 | 2011-02-09 | 长城汽车股份有限公司 | Actuating device for hybrid electric vehicle |
WO2013100620A1 (en) * | 2011-12-29 | 2013-07-04 | 현대 파워텍 주식회사 | 10-shift power train of automatic transmission for vehicle |
US20140162832A1 (en) * | 2012-12-10 | 2014-06-12 | Hyundai Motor Company | Planetary gear train of automatic transmission for vehicle |
CN203926646U (en) * | 2014-06-25 | 2014-11-05 | 中国重型机械研究院股份公司 | A kind of winch planetary transmission |
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2014
- 2014-06-25 CN CN201410288200.1A patent/CN104088974A/en active Pending
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JPH04173693A (en) * | 1990-11-06 | 1992-06-22 | Toyota Autom Loom Works Ltd | Winch |
CN2466418Y (en) * | 2001-02-23 | 2001-12-19 | 西安石油勘探仪器总厂 | Planetary speed changer for petroleum logging winch |
CN2880777Y (en) * | 2006-01-19 | 2007-03-21 | 锦州凯信矿山机械有限公司 | Driving device for drum of winche |
CN201736790U (en) * | 2010-06-09 | 2011-02-09 | 长城汽车股份有限公司 | Actuating device for hybrid electric vehicle |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104373519A (en) * | 2014-11-06 | 2015-02-25 | 南京星能传动机械有限责任公司 | Gear shift planetary reduction device |
CN104890496A (en) * | 2015-06-30 | 2015-09-09 | 天津清源电动车辆有限责任公司 | Hybrid power system, hybrid power vehicle and hybrid driving method |
CN104924889A (en) * | 2015-06-30 | 2015-09-23 | 天津清源电动车辆有限责任公司 | Hybrid power system, hybrid power vehicle and hybrid driving method |
CN104924889B (en) * | 2015-06-30 | 2017-08-22 | 天津清源电动车辆有限责任公司 | A kind of hybrid power system and motor vehicle driven by mixed power and hybrid driving method |
CN105402334A (en) * | 2015-12-21 | 2016-03-16 | 江苏大学 | Four-gear mechanical automatic transmission power assembly system based on planetary gear mechanisms |
CN107100965A (en) * | 2016-02-23 | 2017-08-29 | 舍弗勒技术股份两合公司 | The planetary gear manual transmission of high transmission ratio |
CN107100965B (en) * | 2016-02-23 | 2022-06-03 | 舍弗勒技术股份两合公司 | High ratio planetary gear shifting transmission |
CN106744146A (en) * | 2016-12-29 | 2017-05-31 | 中国矿业大学 | A kind of elevator transmission device with anti-falling function |
CN108313905A (en) * | 2018-03-14 | 2018-07-24 | 中国石油天然气集团有限公司 | The winch driving gear and winch of oil drilling |
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Application publication date: 20141008 |