CN103410944A - Integrated transaxle - Google Patents
Integrated transaxle Download PDFInfo
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- CN103410944A CN103410944A CN2013103835643A CN201310383564A CN103410944A CN 103410944 A CN103410944 A CN 103410944A CN 2013103835643 A CN2013103835643 A CN 2013103835643A CN 201310383564 A CN201310383564 A CN 201310383564A CN 103410944 A CN103410944 A CN 103410944A
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Abstract
An integrated transaxle comprises an external device power supply mechanism, a power input and external device power speed change mechanism, a stepless speed change and differential control mechanism and a wheel transmission device. Three-gear speed regulation of external device power supply mechanism can be achieved by changing the position of slippage gear shifting gear in the power input and external device power speed change mechanism. The stepless speed change and differential control mechanism is formed by integrating a planetary gear mechanism, a worm and gear mechanism and a motor, and regulates speed of a motor of the worm and gear mechanism arranged on an outer tooth ring of a planetary gear in an uniform speed or non-uniform speed mode to achieve stepless speed change and differential of a transmission system. A main reducer and a semi-shaft are integrated in the wheel transmission device. The transaxle integrates functions of three-gear regulation of the external device power supply mechanism, stepless speed change of the transmission system, differential and main speed reduction of a drive axle, and the like, accordingly, sensitivity, portability and handling stability of farmland machines using the integrated transaxle are combined perfectly, and handling performance and automation level are improved.
Description
Technical field
The present invention relates to the drive system field in agricultural machinery equipment, relate in particular to the integrated form transaxle of a kind of integrated stepless speed changes devices, differential mechanism and three speed power out-put devices.
Background technique
At present, the farm work facility such as rice transplanter, paddy planter, vegetable transplanting machine, rape-transplanting machine are all to adopt drive type or manpower walking self-propelled usually.Wherein, although the drive type facility can significantly reduce labor intensity, but because the common unit mass ratio of these type of facility is lower, if load the driver, can make the complete machine gross mass significantly increase, and due to after increasing the driver, the driving force of facility, running gears etc. all will be done corresponding improvement, make the complete machine cost rise, and applicability reduces.And the manpower walking self-propelled can address the above problem, but due in operation process, the driver will follow machinery to walk all the time, and labor intensity is large, and efficiency is low.
For these reasons, if can adopt the mode of remote driving just can address the above problem.And, in the practical application of equipment, no matter adopt drive type or manpower walking self-propelled facility, usually all include motor, clutch, speed changer and castellated steering clutch.Realize remote driving, in engine throttle electronic control size, the clutch of clutch electronic control, all than being easier to, realize, but shift of transmission, facility turn to and are difficult to realize electronic control, if use conventional methods, also can make implement structure very complicated, simultaneously, also can increase because of operation easier, cost significantly rises, and lose the meaning of its production and use.
Summary of the invention
Technical problem solved by the invention is to provide a kind of integrated form transaxle, to solve the shortcoming in the above-mentioned background technology.
Technical problem solved by the invention realizes by the following technical solutions:
A kind of integrated form transaxle, its main body is a closed box, in casing, is packaged with successively external equipment power supply mechanism, power input and external equipment power speed changing mechanism, stepless change and differential control mechanism and these four parts of wheel drive.
Wherein, external equipment power supply mechanism is arranged on a side in closed box, its both sides are sealed by end cap, in end cap, be set with Limit Bearing, and by the fixing output power shaft of Limit Bearing, on this output power shaft, be designed with respectively from left to right three place's external spliness, be respectively used to installation and the transmission of power of the outer power output precision of case internal speed-changing gear, duplicate gear and case.
Power input and external equipment power speed changing mechanism are fixed between equipment dynamic feed mechanism and stepless change and differential control mechanism, comprise two independently axle construction, described lower shaft is power input shaft, its two ends are fixed on the end cap of both sides by Limit Bearing, and on the diameter of axle, be provided with the slip external splines, and on the slip external splines, be set with successively a sliding gear, active force gear and a double-sliding gear; Described upper shaft is the gearshift push rod of an end face with a plurality of limited impressions, and this gearshift push rod can move in the axial direction, and its end with limited impression is connected in a push rod stop collar, by limited impression can realize the shifting gears restriction of push rod gear; And the linkage complete between two axostylus axostyles is crossed a selector fork and is realized, this selector fork is one three fork structure, its underpart connects on sliding gear and double-sliding gear, top is fixed on the gearshift push rod by a back-up ring, make sliding gear and double-sliding gear can slide along the slip external splines under the stirring of selector fork, with the engagement system of speed change gear, duplicate gear in conversion sliding gear, double-sliding gear and equipment dynamic feed mechanism.
Stepless change and differential control mechanism comprise two planetary drive wheel constructions, and these two planetary drive wheel construction symmetries are arranged on jack shaft; And bearings is passed through at described jack shaft two ends, utilize the end cap sealing, on jack shaft, between two groups of planetary gears, the primary speed-down driven gear is installed, described primary speed-down driven gear one end is located with step, the other end is located with snap ring, and the active force gear engagement in described primary speed-down driven gear and power input and external equipment power speed changing mechanism, the primary speed-down driven gear pass through middle spline by transmission of power to jack shaft, jack shaft again by transmission of power to planetary transmission mechanism.And be arranged in each planetary gear construction in stepless change and differential control mechanism, included sun gear, four planet wheels, the planet carrier and the gear ring that are formed by planetary carrier, described sun gear is by the mode of spline joint or directly be welded on jack shaft, planet carrier is by the support two end supports, planet wheel in described planet carrier is fixed on supporting frame by pin, the side of described planet carrier is processed with the power input gear that external gear is done next stage, the actuation gear of semiaxis engagement in described planet carrier external gear and wheel drive, the power of planetary gears is exported to jack shaft, planet carrier is supported on jack shaft by two groups of needle bearings.
In above-mentioned planetary gear construction, sun gear is done power input wheel, planet carrier is done power output, gear ring is done speed regulating mechanism, described gear ring is interior engagement gear ring, Excircle machining at gear ring has worm gear, worm gear coordinates with the worm screw of Electric Machine Control, form a set of kinematic pair, the composite structure of described worm gear and gear ring, under the drive of motor, can control gear ring rotation and sense of rotation, stop, worm gear structure due to the Electric Machine Control of described planetary gear construction combination, form a kind of double-power driving structure by sun gear and worm drive, motion feature according to planetary gears, at the sun gear fixed rotating speed and worm screw variable speed when motion, the planet carrier output speed can be electrodeless adjustable.
Due to being arranged on jack shaft of planetary gears symmetry, if it is identical to control the rotating speed of worm gear of gear ring outer end of two groups of planetary gears, two planet frame ends outputs can infinite variable speed identical speed, if control the rotating speed difference of worm gear of the gear ring outer end of two groups of planetary gears, the different speed of planet carrier output, realize the driving wheel differential.Visible described planetary gears and arrangements for speed regulation thereof can be realized stepless change and differential.
Wheel drive is positioned at stepless change and differential control mechanism one side, both sides are fixed on main box body by end cap, its inside comprises two jack shafts and two actuation gears that are sleeved on live axle, the outside output engagement fluted disc engagement in described actuation gear and planet carrier structure.
In equipment dynamic feed mechanism of the present invention, the low order end of output power shaft is provided with outside thread and locking pin-and-hole, for the vehicle wheel component of fixed outer installation.
In power input of the present invention and external equipment power speed changing mechanism, on the end cap left side extension of power input shaft, have locking pin-and-hole, outside thread and external splines, for installation and the transmission of power of external impetus assembly.
In power input of the present invention and external equipment power speed changing mechanism, described push rod stop collar is a tube-in-tube structure with spacing steel ball and built-in spring, the size of its spacing steel ball and limited impression is complementary, and the position of whole push rod stop collar keeps relative fixing with main box body.
In the present invention, between the planetary drive wheel in described each planetary drive wheel construction be arranged in stepless change and differential control mechanism and worm gear, also be provided with a rolling bearing for limited support, and can effectively carry out helper drive.
In the present invention, the jack shaft of described wheel drive is set with by duplex bearing in stretching out the end cap part of main box body mode increases the stability of live axle output, between two-semiaxle, adopt connection bearing to support, both increased jack shaft stability, also improved the efficiency of transmission.
Beneficial effect: the present invention is integrated in one by speed changer, main reducing gear, differential mechanism and power take-off, form an integrated transaxle, worm gear structure is wherein adjusted the rotating speed of the gear ring in planetary drive in good time under the control of speed-adjustable motor, the exportable neutral of speed changer, infinite variable speed forward gear and reverse gear, also can realize that the limit of left and right sidesing driving wheel is turned round differential.Can be applicable to, in the farm work facility such as rice transplanter, paddy planter, vegetable transplanting machine, rape-transplanting machine, can effectively improve its automatization level, make the far-end remote control operation to these class facility become possibility.
The accompanying drawing explanation
Fig. 1 is the internal structure schematic diagram of preferred embodiment of the present invention.
Fig. 2 is the lateral plan of preferred embodiment of the present invention.
Fig. 3 is the external equipment power supply structural scheme of mechanism of preferred embodiment of the present invention.
Fig. 4 is power input and the external equipment power speed changing structural scheme of mechanism of preferred embodiment of the present invention.
Fig. 5 is power stepless change and the differential control structural scheme of mechanism of preferred embodiment of the present invention.
Fig. 6 is the stepless change of preferred embodiment of the present invention and the planetary drive wheel construction detailed drawing in differential control mechanism.
Fig. 7 is the wheel drive schematic diagram of preferred embodiment of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Referring to the preferred embodiment of a kind of integrated form transaxle of Fig. 1 ~ Fig. 7, this embodiment comprises 6 major parts: main box body 1, case lid 2, external equipment power supply mechanism 3, power input and external equipment power speed changing mechanism 4, stepless change and differential control mechanism 5, wheel drive 6 and external differential control mechanism 8.Equipment dynamic feed mechanism 3, power input and external equipment power speed changing mechanism 4, stepless change and differential control mechanism 5, wheel drive 6 and left and right difference speed control mechanism 8 integrated installations, on main box body 1 and case lid 2, below elaborate structure and the relevant function of each several part.
External equipment power supply mechanism 3 parts mainly comprise the first left end cap 301, the first right end cap 307, output power shaft 305, speed change gear 303, duplicate gear 304, the first back-up ring 302 and the second back-up ring 306; The first left end cap 301 is installed on main box body 1, and bearing is equipped with in inside; The first right end cap 307 is installed on case lid 2, and bearing and the first oil sealing 308 are equipped with in inside; Output power shaft 305 two ends are installed on respectively in bearing, be designed with respectively from left to right three place's external spliness, be respectively used to installation and the transmission of power of the outer power output precision of case internal speed-changing gear 303, duplicate gear 304 and case, low order end is designed with outside thread and locking pin-and-hole, for the assembly of fixed outer installation; After speed change gear 303 and duplicate gear 304 were installed on output power shaft 305, the corresponding installation adjusted the first back-up ring 302 and the second back-up ring 306 respectively, guarantees the axial float of output power shaft 305.
In the part of power input and external equipment power speed changing mechanism 4, mainly comprise power input shaft 406, the second left end cap 405, the second right end cap 413, sliding gear 409, double-sliding gear 411, active force gear 410, active force tooth back-up ring 412, selector fork 414, gearshift push rod 417, shift fork back-up ring 418, push rod left support 401, push rod right support 416, push rod stop collar 420, spacing steel ball 402, limit spring 403 and spring collar 404 etc.; Push rod left support 401 and the second left end cap 405 are installed on respectively on main box body 1, and push rod right support 416 and the second right end cap 413 are installed on respectively on case lid 2; Bearing and the second oil sealing 407 are housed in the second left end cap 405, in the second right end cap 413, bearing is housed, power input shaft 406 two ends are installed on respectively in the bearing of the second left end cap 405 and the second right end cap 413, left end is designed with locking pin-and-hole, outside thread and external splines, for installation and the transmission of power of external impetus assembly
In addition, at power input shaft 406, be designed with slip external splines 408 between inner two bearings, sliding gear 409, active force gear 410 and double-sliding gear 411 are set on slip external splines 408, active force gear 410 is spacing by active force tooth back-up ring 412, sliding gear 409 and double-sliding gear 411 can slide along slip external splines 408 under the stirring of selector fork 414, the engagement of conversion sliding gear 409, double-sliding gear 411 and speed change gear 303, duplicate gear 304; 417 1 of push rods of gearshift run through 416 installations of push rod right support and are sealed by the 3rd oil sealing 415, insert in push rod left support 401 other end, selector fork 414 spacing by shift fork back-up ring 418 is passed in centre, gearshift push rod 417 has the 3rd back-up ring 421 near the installed inside of case lid 2, and the push rod 417 that prevents from shifting gears is pulled out when gearshift; Simultaneously, be designed with three road limited impressions 419 at gearshift push rod 417 left ends, push rod stop collar 420 adapter sleeves are loaded on push rod left support 401.
After gearshift push rod 417 is packed push rod left support 401 into, in spacing steel ball 402 and limit spring 403 as the push rod stop collar 420 of scheming to pack into successively, and finally fastening by spring collar 404 precompressed limit spring 403 location, when 417 gearshifts of external control gearshift push rod are moved, spacing steel ball 402 can be by jack-up, when gearshift push rod 417 moves to the limited impression 419 of respective notch, spacing steel ball 402 resets under the effect of limit spring 403, and, when externally operating while failing, namely be in the spacing state of operation.
In stepless change and differential control mechanism 5, mainly comprise the 3rd left end cap 503, the 3rd right end cap 504, jack shaft 501, left control worm screw 505, right control worm screw 506, left lateral star control section 507, right lateral star control section 508, primary speed-down driven gear 509 and the 4th back-up ring 510.The 3rd left end cap 503 and the 3rd right end cap 504 are installed on respectively in main box body 1 and case lid 2, and side is spacing by bearing within it, and jack shaft 501 two ends are installed in bearing; Primary speed-down driven gear 509 is installed on jack shaft 501 middle parts, and spacing by the 4th back-up ring 510, and primary speed-down driven gear 509, by the spline transferring power of design on jack shaft 501, drives jack shaft 501 rotations; Left lateral star control section 507 and right lateral star control section 508 are symmetrical in primary speed-down driven gear 509 distribution design, and control respectively planet differential by left control worm screw 505 and right control worm screw 506, thus the function of the speed change of realization and differential steering.
In the present embodiment, left lateral star control section 507 be symplex structure with right lateral star control section 508, below with regard to the structure of the detailed description planet control section of left lateral star control section 507 parts of Fig. 6: this part mainly comprises worm gear 50707, planet wheel 50710, planet carrier 50702, pin 50711, supporting frame 50712, rolling bearing 50705, needle bearing 50701, spacing inner shield ring 50706 and spacing outer back-up ring 50715; There is needle bearing 50701 at the interior two ends of planet carrier 50702 design and installation respectively, and be set on jack shaft 501, rolling bearing 50705 is installed on planet carrier 50702 peripheries, worm gear 50707 is installed on rolling bearing 50705 peripheries, and spacing by spacing outer back-up ring 50715 and spacing inner shield ring 50706 respectively; Planet wheel 50710 is installed on planet carrier 50702 right sides by pin 50711, and is designed with axially locating and the support of supporting frame 50712 as planet wheel 50710; So far, planet carrier 50702, worm gear 50707, rolling bearing 50705 and planet wheel 50710 assembling adults as main part, be set in the rear each several part tooth of jack shaft 501 intermeshing, in the time of the external tooth of planet wheel 50710 and gear ring 50709 engagement, also with sun gear 50713, mesh, the worm-gear tooths 50708 of worm gear 50707 outside designs are intermeshing with left worm screw 505; Jack shaft 501 drives planet wheel 50710 around 50711 rotations of power pin by sun gear 50713, under conventional state, control worm gear 50707 and under the stiction effect of left worm screw 505, keep relatively static, planet wheel 50710 does relative motion along the inboard of controlling worm gear 50707, and by power pin 50711, drive planet carriers 50702 and do relative rotary motion around jack shaft 501, and by planet carrier external gear 50703 by transmission of power to actuation gear 608; When needs acceleration, deceleration or left and right both sides need differential, differential control mechanism 8 will control respectively the rotation of left control worm screw 505 and right control worm screw 506, when rotational speed is variant, export differential-speed dynamic, the rotation rotating speed impels to be controlled worm gear 50707 and slows down when consistent with planet wheel moving direction, and the rotation rotating speed impels controls worm gear 50707 and planet wheel 50710 moving direction speedup when opposite.
Above demonstration and described basic principle of the present invention and major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (7)
1. integrated form transaxle, its main body is a closed box, it is characterized in that, in casing, be packaged with successively external equipment power supply mechanism, power input and external equipment power speed changing mechanism, stepless change and differential control mechanism and these four parts of wheel drive, wherein:
In external equipment power supply mechanism, include an output power shaft, on this output power shaft, be designed with respectively from left to right three place's external spliness, and by external splines, the outer power output precision of speed change gear, duplicate gear and case is installed;
Power input and external equipment power speed changing mechanism are fixed between equipment dynamic feed mechanism and stepless change and differential control mechanism, in it, comprise two independently axle construction, its underpart axostylus axostyle is power input shaft, on its diameter of axle, be provided with the slip external splines, and on the slip external splines, be set with successively a sliding gear, active force gear and a double-sliding gear, and upper shaft is the gearshift push rod of an end face with a plurality of limited impressions, this gearshift push rod can move in the axial direction, and its end with limited impression is connected in a push rod stop collar, by limited impression can realize the shifting gears restriction of push rod gear, and the linkage complete between two axostylus axostyles is crossed a selector fork and is realized,
Stepless change and differential control mechanism comprise two planetary drive wheel constructions, and these two planetary drive wheel construction symmetries are arranged on jack shaft, simultaneously, between two groups of planetary gears on jack shaft, a primary speed-down driven gear also is installed, the active force gear engagement in primary speed-down driven gear and power input and external equipment power speed changing mechanism, and be arranged in each planetary gear construction in stepless change and differential control mechanism, included sun gear, four planet wheels, the planet carrier and the gear ring that are formed by planetary carrier, wherein, sun gear is by the mode of spline joint or directly be welded on jack shaft, planet carrier is by the support two end supports, and the planet wheel in planet carrier is fixed on supporting frame by pin, simultaneously, side at planet carrier is processed with the power input gear of external gear as next stage, the actuation gear of semiaxis engagement in this planet carrier external gear and wheel drive, the power of planetary gears is exported to jack shaft, and described gear ring is interior engagement gear ring, the external tooth of planet wheel and gear ring engagement, and the Excircle machining of gear ring has worm gear, worm gear coordinates with the worm screw of Electric Machine Control, forms a set of kinematic pair,
Wheel drive is positioned at stepless change and differential control mechanism one side, both sides are fixed on main box body by end cap, its inside comprises two jack shafts and two actuation gears that are sleeved on live axle, the outside output engagement fluted disc engagement in described actuation gear and planet carrier structure.
2. a kind of integrated form transaxle according to claim 1, is characterized in that, selector fork is one three fork structure, and its underpart connects on sliding gear and double-sliding gear, and top is fixed on the gearshift push rod by a back-up ring.
3. a kind of integrated form transaxle according to claim 1, it is characterized in that, described push rod stop collar is a tube-in-tube structure with spacing steel ball and built-in spring, the size of its spacing steel ball and limited impression is complementary, and the position of whole push rod stop collar keeps relative fixing with main box body.
4. a kind of integrated form transaxle according to claim 1, is characterized in that, also is provided with a rolling bearing between the planetary drive wheel in described each planetary drive wheel construction be arranged in stepless change and differential control mechanism and worm gear.
5. a kind of integrated form transaxle according to claim 1, is characterized in that, primary speed-down driven gear one end in described stepless change and differential control mechanism is located with step, and the other end is located with snap ring.
6. a kind of integrated form transaxle according to claim 1, is characterized in that, the planet carrier in described stepless change and differential control mechanism is supported on jack shaft by two groups of needle bearings.
7. a kind of integrated form transaxle according to claim 1, it is characterized in that, the jack shaft of described wheel drive is set with by duplex bearing in stretching out the end cap part of main box body mode increases the stability of live axle output, between two-semiaxle, adopts connection bearing to support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310383564.3A CN103410944B (en) | 2013-08-29 | 2013-08-29 | Integrated transaxle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310383564.3A CN103410944B (en) | 2013-08-29 | 2013-08-29 | Integrated transaxle |
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| CN103410944A true CN103410944A (en) | 2013-11-27 |
| CN103410944B CN103410944B (en) | 2014-05-07 |
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| CN201310383564.3A Expired - Fee Related CN103410944B (en) | 2013-08-29 | 2013-08-29 | Integrated transaxle |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074953A (en) * | 2014-07-01 | 2014-10-01 | 任金瑞 | Gearbox of automatic transmission differential motor |
| CN104500685A (en) * | 2014-11-11 | 2015-04-08 | 山东汇金股份有限公司 | High-strength low-noise differential assembly and material |
| CN105015333A (en) * | 2015-04-11 | 2015-11-04 | 韦国宗 | Multi-functional machinery driving machine with functions of shifting, thrust augmentation and energy conservation |
| CN105065619A (en) * | 2015-09-16 | 2015-11-18 | 湖南省农友机械集团有限公司 | Dual-power input type multi-gear and differential-type steering track vehicle transmission |
| CN106594224A (en) * | 2017-02-15 | 2017-04-26 | 苏州萨伯工业设计有限公司 | Hydraulic-control proportional steering device |
| CN106704562A (en) * | 2017-02-15 | 2017-05-24 | 苏州萨伯工业设计有限公司 | Mechanical-hydraulic four-gear transmission case |
| CN110131366A (en) * | 2019-04-25 | 2019-08-16 | 长沙桑铼特农业机械设备有限公司 | A kind of caterpillar tractor variable speed drive and tractor |
| CN110701276A (en) * | 2019-10-11 | 2020-01-17 | 杭州耐巡客车变速箱有限公司 | Double-planet shunting type differential electrically-driven bridge reducer and assembling method thereof |
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| US8118700B2 (en) * | 2008-02-20 | 2012-02-21 | GM Global Technology Operations LLC | Multi-speed transmission for a front wheel drive vehicle |
| CN102758896A (en) * | 2012-04-29 | 2012-10-31 | 崔永兴 | Mechanical stepless speed change drive axle of planetary gear |
| CN103010016A (en) * | 2012-12-07 | 2013-04-03 | 重庆隆旺机电有限责任公司 | Rear axle driving assembly for electrocar |
| CN203413073U (en) * | 2013-08-29 | 2014-01-29 | 湖南农业大学 | Integrated speed-change drive axle |
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| US8118700B2 (en) * | 2008-02-20 | 2012-02-21 | GM Global Technology Operations LLC | Multi-speed transmission for a front wheel drive vehicle |
| CN102758896A (en) * | 2012-04-29 | 2012-10-31 | 崔永兴 | Mechanical stepless speed change drive axle of planetary gear |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074953A (en) * | 2014-07-01 | 2014-10-01 | 任金瑞 | Gearbox of automatic transmission differential motor |
| CN104500685A (en) * | 2014-11-11 | 2015-04-08 | 山东汇金股份有限公司 | High-strength low-noise differential assembly and material |
| CN105015333A (en) * | 2015-04-11 | 2015-11-04 | 韦国宗 | Multi-functional machinery driving machine with functions of shifting, thrust augmentation and energy conservation |
| CN105065619A (en) * | 2015-09-16 | 2015-11-18 | 湖南省农友机械集团有限公司 | Dual-power input type multi-gear and differential-type steering track vehicle transmission |
| CN106594224A (en) * | 2017-02-15 | 2017-04-26 | 苏州萨伯工业设计有限公司 | Hydraulic-control proportional steering device |
| CN106704562A (en) * | 2017-02-15 | 2017-05-24 | 苏州萨伯工业设计有限公司 | Mechanical-hydraulic four-gear transmission case |
| CN110131366A (en) * | 2019-04-25 | 2019-08-16 | 长沙桑铼特农业机械设备有限公司 | A kind of caterpillar tractor variable speed drive and tractor |
| CN110701276A (en) * | 2019-10-11 | 2020-01-17 | 杭州耐巡客车变速箱有限公司 | Double-planet shunting type differential electrically-driven bridge reducer and assembling method thereof |
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|---|---|
| CN103410944B (en) | 2014-05-07 |
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