CN103322142A

CN103322142A - Planetary and hydraulic combined automatic continuously-variable transmission

Info

Publication number: CN103322142A
Application number: CN2013102294734A
Authority: CN
Inventors: 王宪平
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-06-09
Filing date: 2013-06-09
Publication date: 2013-09-25
Anticipated expiration: 2033-06-09
Also published as: CN103322142B

Abstract

The invention discloses a planetary and hydraulic combined automatic continuously-variable transmission. According to the planetary and hydraulic combined automatic continuously-variable transmission, a planetary deceleration starting system, a plunger hydraulic mandatory speed control system and a centrifugal force automatic random control system are organically combined together and the rigid advantages that planetary transmission is large in gear ratio and transmission power, the flexible advantages that a plunger hydraulic system is high in overload resistance, impact resistance and infinitely variable speed performance and the advantages that a centrifugal force control device is high in randomness are fully utilized, so that the large gear ratio and high-power power automatic continuously-variable transmission which is simple, efficient and reliable is achieved.

Description

Planet hydraulic resultant force CVT (continuously variable transmission)

Technical field

The present invention relates to a kind of speed changer, particularly a kind of combination by planetary reduction gear starting, hydraulic forced speed change, the automated randomized regulation and control of centrifugal force, thereby the planet hydraulic resultant force CVT (continuously variable transmission) of realization transmission of power.

Background technique

Be used at present the mechanical continuously-variable transmission of transmission of power, comprise chain-belt type, cone disk type, steel ball type etc., exist deficiencies such as less, the overload-resistant and impact resistance of transmitted power is relatively poor; Not only transmitted power is limited by hydraulic transmission that oil hydraulic pump and oil hydraulic motor are formed, and transmission efficiency is also lower; Though adopt the speed changer of fluid torque converter that many advantages are arranged, have also that functional reliability is poor, structure is complicated, price is than deficiencies such as costlinesses.

Summary of the invention

Purpose of the present invention provides a kind of planet hydraulic resultant force CVT (continuously variable transmission) that can improve existing CVT (continuously variable transmission) deficiency just at existing deficiency in the above-mentioned prior art.

Purpose of the present invention can realize by following technique measures:

Planet hydraulic resultant force CVT (continuously variable transmission) of the present invention comprises by front case, the mission case that rear case and gearshift case link together, the power input shaft of described CVT (continuously variable transmission) passes the bearing that is arranged on the bearing on the front case and is arranged on the planet carrier and is arranged at front case inside, shaft part between input shaft bearing and the bearing is provided with sun gear, be provided with the planetary pinion that several are meshed with sun gear and ring gear respectively around described sun gear is uniform, the unilateral bearing on the ring platform is connected with front case described ring gear in the front case by being arranged at, described planetary planet axis is connected with planet carrier by the bearing that is arranged on the planet carrier, passes back-up ring with the mode of the off-centre eccentric shaft that has been rigidly connected with respect to a planetary end being positioned at planet axis; The output shaft that described planet carrier is rigidly connected and extends to rear case inside and be connected with rear case by bearing, the clutch end of described output shaft is connected with the gearshift axle by spline, be provided with several quantity plunger case identical with described planetary pinion at radial equipartition on the hub between output shaft and the described planet carrier, place the plunger of described plunger case inside to fit together by the lower pressure wheel that Fang Dingyu is sleeved on the eccentric shaft, and between the intracavity bottom of described plunger case and plunger, be provided with spring; The axis central part of described output shaft is provided with oil input channel, and an end of described oil input channel is connected with plunger case by one-way valve, and the other end is connected with the in line check valve that is arranged on the rear case outside through the oil groove on the output shaft cylindrical; On described output shaft around uniform several quantity oil expulsion channel identical with plunger case that be provided with of oil input channel, one end of described oil expulsion channel is connected with plunger case, and the other end is connected with the oil extraction one-way valve that is arranged on the rear case outside through the oil groove on the output shaft cylindrical and by oil extraction adjusting mouth; Described oil extraction is regulated mouth and is arranged on axially parallel with output shaft and be horizontally through the oil extraction adjustable lever stage casing of oil expulsion channel, the both sides of passing oil expulsion channel at the oil extraction adjustable lever are provided with stuffing box gland, the circle of deciding that is provided with Returnning spring of one end of described oil extraction adjustable lever and thrust-bearing fits, the other end fits with the push rod front end that is with Returnning spring, and the rear end of described push rod fits with the shift fork that is arranged in the gearshift upper box part inner chamber; The moving-coil of described thrust-bearing fits by wedge shape change and the little inclined-plane that is installed in centrifugal of wedge shape on the output shaft in the mode that is slidingly matched, and thrust-bearing with the mode that is slidingly matched be arranged on rear case in encircle the platform periphery slide rail be connected; Described shift fork is sleeved on the declutch shift shaft of fixedlying connected with the case case lid of shifting gears, and the upper end of described shift fork is hinged with the lever that stretches out gearshift case case lid, and the lower end is nested in the peripheral groove of power shift gear; Described power shift gear is contained on the cylindrical spline of gearshift axle by the inner spline housing of circle in being arranged on, and the two ends cylindrical of described power shift gear all offers teeth groove, the teeth groove of described power shift gear two ends cylindrical can be meshed with the intermediate gear of reverse gear apparatus, the internal tooth of rear output shaft respectively by the slip of power shift gear on the gearshift axle, described rear output shaft is provided with for the external tooth that connects reverse gear apparatus being positioned at gearshift case inside, and the pto end of rear output shaft stretches out the outside of gearshift case.

Reverse gear apparatus of the present invention comprises intermediate gear that the cylindrical teeth groove that is fixed in a side on the jack shaft and corresponding with power shift gear is meshed, is located at the reversing shaft of gearshift box cavity bottom and is fixed on little tumbler gear, the big tumbler gear that the reversing shaft two ends are meshed with the external tooth of intermediate gear and rear output shaft respectively by bearing bracket stand, and described jack shaft is installed on the support of gearshift box cavity by sliding bearing.

Centrifugal of wedge shape of the present invention is nested in the mode that is slidingly matched and is fixedly installed on output shaft and changes in the sliding sleeve of hub rear sidewall.

Declutch shift shaft of the present invention be provided with three match with the projection of shift fork be used for the fixedly positioning pit of gear.

Sun gear of the present invention, planetary pinion are cylindric spiral gear.

The bearing that matches between planet axis of the present invention and the planet carrier is the needle-type bearing.

Principle of the present invention is as follows:

One, the ring gear that is installed on the front case and can only rotates in the same way with sun gear by the sun gear of input shaft and consubstantiality, planet carrier and planetary pinion mounted thereto, through unilateral bearing, and and the common gearing down system that constitutes of the output shaft of planet carrier consubstantiality institute, its effect is to provide one to start gear ratio for load.

Two, by with planet carrier, several plunger cases, plunger and the Fang Ding of output shaft consubstantiality, spring, and and the eccentric shaft of planetary pinion, planet axis consubstantiality, the plunger hydraulic pump that lower pressure wheel constitutes force speed variator system.The reciprocating power of plunger pump from eccentric shaft, lower pressure wheel with the downforce of the reverse time rotational of planet gear, the last top power of spring and the centrifugal top gravity of going up that plunger self produces with rotation, when wherein plunger is up, can only be from the oil input channel inspiration hydraulic oil of bottom because the oil expulsion channel of plunger case bottom is sealed by the oil extraction one-way valve, when plunger is descending, then since oil input channel sealed by in line check valve and can only discharge hydraulic oil from oil expulsion channel.Importantly, plunger hydraulic pump effect in the present invention is not the common pressure oil that provides, but utilize its pump internal pressure that reaction force is provided, in case namely the oil hydraulic pump pressure inside approaches or equals the downforce that lower pressure wheel applies, to force and lower pressure wheel, the reverse rotation of the planetary pinion of eccentric shaft consubstantiality is slowed down and is stopped rotation very soon, wherein the deceleration of the reverse rotation of planetary pinion will drive ring gear and be rotated by static the beginning, and make planetary revolution, the rotation of planet carrier and output shaft is accelerated, this means infinite variable speed beginning, planetary pinion stops reverse rotation and means that then the whole of planetary system rotates synchronously, stepless change reaches peak value, and this moment, the speed ratio of input shaft and output shaft was 1: 1.

Three, the oil extraction adjustable lever, the Returnning spring that cross oil expulsion channel in the rear case that be installed in output shaft and change centrifugal of wedge shape and the sliding sleeve of hub rear side facade, be installed in thrust-bearing and wedge shape change on the ring platform slide rail in the rear case, are installed in the thrust-bearing back have constituted infinite variable speed automated randomized regulator control system.The centrifugal gravity that centrifugal of wedge shape produces because of its weight when its role is to utilize output shaft to rotate, and by the inclined-plane that intersects with the wedge shape change thrust-bearing and oil extraction adjustable lever are passed backward, make oil extraction regulate mouth and depart from oil expulsion channel, and very fast by the sealing of the stuffing box gland on adjustable lever oil expulsion channel; Otherwise when the decline of output shaft rotating speed, when centrifugal centrifugal force of wedge shape reduces, the strength of Returnning spring will promote oil extraction adjustable lever, thrust-bearing and wedge shape change, the centrifugal block reset of wedge shape.The process that this is closed oil expulsion channel or is opened is exactly the process of centrifugal force regulating controller auto-control plunger hydraulic pump internal pressure, also is the infinite variable speed process of auto-control.

Four, facade is connected with the gearshift case behind rear case, and wherein the gearshift beam warp spline by output shaft and gearshift case is connected the back transferring power, by being enclosed within power shift gear on the gearshift axle spline, being installed in lever on the gearshift case lid and shift fork and carrying out and shift gears.The gearshift case is provided with forward gear, neutral, reverse gear, can be load three kinds of running statees are provided.Be shown as the reverse gear state in the accompanying drawing 1, meshed the reverse gear train to rear output shaft external tooth driven loads by power shift gear, cinclides reached a push rod in fore poppet hole of shifting gears before shift fork had withstood forward and has been arranged in the gearshift case during this state, push rod has held out against the oil extraction adjustable lever on the rear case forward, stepless automatic transmission is inoperative when making the reverse gear operation, and load can only be with the gear ratio operation of setting; Power shift gear does not mesh any gear after hanging up neutral, so not transmission; Hang up forward gear and then meshed the internal tooth of rear output shaft by power shift gear, for load provides stepless automatic transmission power.

In sum, interaction between each system of this CVT (continuously variable transmission) is placed in the actual motion and can simply be expressed as: hang up the input of forward gear-power and make planetary system drive centrifugal force automatic regulating system work and begin oil extraction to oil expulsion channel with the rotation of maximum gear ratio bringing onto load starting-input shaft not press to increase in smooth-plunger hydraulic pump and cause planetary pinion rotation deceleration, the ring gear starting, output shaft and rear output shaft drive load and accelerate the increasing of operation-centrifugal force jointly, the centrifugal force automatic regulating system make the oil expulsion channel oil extraction more difficult-press in the plunger hydraulic pump bigger, so circulation, oil expulsion channel is very fast by complete closed and cause plunger hydraulic pump and stop back and forth, planetary pinion stops reverse rotation, the whole rotation synchronously of planetary system and drive load move with 1: 1 gear ratio, and stepless automatic transmission reaches peak value; Otherwise, if this moment load resistance increase (as automobile go up a slope, brake), perhaps import power and reduce (as subtracting throttle), above process is antikinesis, the interaction force transient equilibrium until between each system, load will travel at the uniform speed with certain gear ratio; Perhaps speed changer makes load continue to accelerate or run slowly according to the variation of resistance, power auto-control stepless change ratio at random.

Beneficial effect of the present invention is as follows:

CVT (continuously variable transmission) of the present invention forces planetary reduction gear starting system, plunger hydraulic speed variator system and the automated randomized regulator control system of centrifugal force organically to combine, give full play to the rigidity characteristics that the Gear Planet Transmission gear ratio is big, transmitted power is big, the plunger hydraulic system is overload-resistant, impact resistance strong, the strong flexibility characteristics of stepless change, and the strong characteristics of centrifugal force regulating controller randomness, thereby realize brief, efficient, reliably big gear ratio, the transmission of powerful power stepless automatic transmission.

Description of drawings

Fig. 1 cuts open structural representation for side of the present invention.

Fig. 2 is the sectional view of A-A among Fig. 1.

Among the figure: 1, drain oil; 2, lower pressure wheel; 3, back-up ring; 4, eccentric shaft; 5, planet axis; 6, planetary pinion; 7, bearing; 8, planet carrier; 9, ring gear; 10, front case; 11, unilateral bearing; 12, bearing; 13, sun gear; 14, input shaft; 15, oil sealing; 16, bearing; 17, one-way valve; 18, plunger case; 19, spring; 20, plunger; 21, Fang Ding; 22, tank filler sleeve; 23, oil input channel; 24, oil expulsion channel; 25, mouth is regulated in oil extraction; 26, oil extraction one-way valve; 27, oil extraction adjustable lever; 28, Returnning spring; 29, push rod; 30, gearshift axle; 31, output shaft; 32, rear case; 33, wedge shape is centrifugal; 34, sliding sleeve; 35, wedge shape change; 36, thrust-bearing; 37, slide rail; 38, Returnning spring; 39, in line check valve; 40, seal ring; 41, oil groove; 42, screw; 43, gearshift case; 44, little tumbler gear; 45, reversing shaft; 46, drain oil; 47, sliding bearing; 48, intermediate gear; 49, big tumbler gear; 50, spline; 51, support; 52, jack shaft; 53, spline; 54, external tooth; 55, sliding bearing; 56, rear output shaft; 57, internal tooth; 58, power shift gear; 59, declutch shift shaft; 60, positioning pit; 62, tank filler sleeve; 63, shift fork; 64, gearshift case case lid; 65, lever support; 66, lever.

Embodiment

The present invention is described further below with reference to embodiment's (accompanying drawing):

As shown in Figure 1, the input shaft 14 of planet hydraulic resultant force CVT (continuously variable transmission) of the present invention and sun gear 13 consubstantialities also are installed in front case 10 centers through bearing 16, and its rear end is in bearing 12 is installed in the center hole of planet carrier 8; Ring gear 9 is installed in through unilateral bearing 11 on the interior ring platform of front case 10, unilateral bearing 11 make ring gear 9 can only with the sun gear 13 the same forward rotation of doing; Be installed in the center hole of rear case 32 through bearing with the output shaft 31 of planet carrier 8, plunger case 18 consubstantialities; Planetary pinion 6 and planet axis 5, eccentric shaft 4 consubstantialities also are installed in several holes of planet carrier 8 circumference through bearing 7, lower pressure wheel 2 is enclosed within on the eccentric shaft 4 in addition, back-up ring 3 is installed in lower pressure wheel 2 two ends, and the effect of back-up ring 3 is to be worked between back-up ring in lower pressure wheel 2 and top, side 21.Top, side 21 in that 18 li of plunger cases are equipped with plunger 20 and consubstantiality has spring 19 that top power is provided under the plunger 20, top 21, the side of making keeps the state that offsets with lower pressure wheel 2; There is oil input channel 23 at the center of output shaft 31 below plunger case 18, its front end leads to several plunger cases 18 through one-way valve 17, the rear end has been communicated with in line check valve 39 through the oil groove 41 of output shaft circumference and the oil expulsion channel in the rear case 32, make the hydraulic oil (not showing hydraulic oil container and filter cleaner among the figure) after plunger case 18 can filter by the oil inlet pipe inspiration on the in line check valve 39, two one-way valves in this oil-feed system can ensure that hydraulic oil only advances not arrange; In output shaft 31, also be provided with the oil expulsion channel 24 identical with plunger case quantity, its front end is to the end rear side of plunger case 18, the rear end is through the oil groove 41 of output shaft 31 circumference, and the oil expulsion channel in rear case 32 and oil extraction are regulated mouthfuls 25 and have been communicated with oil extraction one-way valve 26, hydraulic oil only export but no import when oil extraction one-way valve 26 can ensure the oil hydraulic pump oil extraction to hydraulic oil container; Advance, the hole wall circumference at rear case 32 rear portions of in the middle of the oil-discharge trough 41 and both sides is equipped with three seals ring 40, from the microgap of output shaft and rear case hole wall, do not leak in order to ensure hydraulic oil, and advance, do not scurry oil between the oil-discharge trough.The rear side circumference facade that changes hub at output shaft 31 fixedly has several sliding sleeves 34, centrifugal 33 of the wedge shape that is the four sides cylinder places sliding sleeve 34, wedge shape change 35 inclined-planes of the little inclined-plane of its sphenocephaly and rear side intersect, and the big inclined-plane of its sphenocephaly prevents that centrifugal reaches fixedly the bolt of lower pressure wheel 2 with back-up ring 3 and collide; Wedge shape change 35 is fixed on the moving-coil of thrust-bearing 36 thereafter, and the seat ring of thrust-bearing 36 is enclosed within by chute on the interior ring platform slide rail 37 of rear case 32, such for thrust-bearing can before and after flexibly mobile and seat ring do not rotate; In the hole in thrust-bearing 36 back rear cases an oil extraction adjustable lever 27 is housed, the thin portion in the stage casing of adjustable lever is that mouth 25 is regulated in oil extraction, on the adjustable lever on adjusting mouthful both sides stuffing box gland is housed, wherein oil extraction adjusting mouth 25 intersects with the oil expulsion channel 24 that leads to oil extraction one-way valve 26, be used for the adjusting of oil drain quantity, stuffing box gland then plays the sealing oil expulsion channel and ensures the effect that hydraulic oil does not leak; Be provided with several half dark holes along the rear case of thrust-bearing 36 back circumference, Returnning spring 38 be housed in the hole head on thrust-bearing 36, wherein Returnning spring 28 because of the position by on the shared push rod 29 that has been enclosed within the back of thrust adjustable lever 27.The back facade of rear case 32 connects as one by screw 42 with the antetheca of gearshift case 43, and connected gearshift axle 30 by output shaft 31 through spline, and gearshift axle 30 front ends are before bearing is installed in the gearshift case in the cinclides, and the rear end is installed in rear output shaft 56 center holes through sliding bearing 55; At gearshift case case lid 64 lever support 65 is installed, lever 66 is housed on the lever support, two supports are arranged below the case lid 64, be with shelves fork 63 on the rack-mount declutch shift shaft 59 and be provided with three positioning pits 60, its effect is when lever 66 lower end spheroids are stirred shift fork 63 to any one positioning pit 60, spring in the shift fork withstands on small ball and guarantees the unlikely generation deviation of gear in certain thrust in the positioning pit, in order to avoid influence the normal operation of each gear; Gearshift is provided with three gears, lever 66 pushes away forward and is forward gear, this moment, power shift gear 58 meshed the internal tooth 57 that is installed in the rear output shaft 56 on the gearshift case rear wall through bearing, since power shift gear 58 through spline housing on the keyway of gearshift axle 30, and the spline head of gearshift axle 30 is inserted in the inner spline groove of output shaft 31, therefore makes output shaft 31 and rear output shaft 56 be connected state; Be neutral when lever 66 promotes shift fork 63 in the neutral position, power shift gear 58 does not mesh other gear; Lever 66 post-tensionings are reverse gear when making shift fork 63 be in front position, this moment, reverse gear 58 meshed intermediate gear 48, intermediate gear 48 meshes little tumbler gear 44 again, be fixed on the external tooth 54 that 49 of big tumbler gears on the reversing shaft 45 have meshed rear output shaft 56 equally with little tumbler gear 44, make rear output shaft 56 be the backward rotation state; In the reverse gear system, intermediate gear 48 is fixed on the jack shaft 52 through spline 53, and in the cinclides, the rear end is installed on the support 51 through sliding bearing jack shaft 52 front ends before sliding bearing 47 is installed in the gearshift case; Little tumbler gear 44 and reversing shaft 45 consubstantialities, 49 of big tumbler gears are fixed on the reversing shaft 45 through spline 50, and reversing shaft 45 front end and back end are respectively before and after bearing is installed in the gearshift case in the cinclides; Importantly, shift fork 63 has withstood the push rod 29 that can move forward and backward in preceding tank wall hole and declutch shift shaft fore poppet hole when the reverse gear state, make the front end of push rod 29 hold out against oil extraction adjustable lever 27, purpose is that stepless change does not take place when reverse gear is moved, if thereby when planet row gear ratio is 5: 1, the gear ratio that output shaft 31 passes to gearshift axle 30 still is 5: 1, but the velocity ratio between reverse gear is 1.2: 1, therefore the actual gear ratio of reverse gear is 5 * 1.2 to 1, namely 6: 1, thus during reverse gear rear output shaft 56 to pass to the moment of torsion of load bigger.In the present invention, the gearshift case system of the stepless automatic transmission system of front and back all adopts splash system lubrication, and respectively by

tank filler sleeve

22 and 62 and drain oil 1 and 46 lubricating oil fillings or emit lubricant oil; Simultaneously for preventing that transmission oil from leaking, in input shaft 14 and front case 10 contacting points oil sealing 15 is housed, in rear output shaft 56 and shift gears case 43 rear wall contacting points and push rod and gearshift case antetheca contacting point oil sealing is housed all, the lever support 65 that is installed in simultaneously on the gearshift case lid 64 also is sealing state.

Claims

1. planet hydraulic resultant force CVT (continuously variable transmission), it is characterized in that: described CVT (continuously variable transmission) comprises by front case (10), the mission case that rear case (32) and gearshift case (43) link together, the power input shaft of described CVT (continuously variable transmission) (14) passes the bearing (16) that is arranged on the front case (10) and the bearing (12) that is arranged on the planet carrier (8) is arranged at front case (10) inside, the shaft part that input shaft (14) is positioned between bearing (12) and the bearing (16) is provided with sun gear (13), be provided with the planetary pinion (6) that several are meshed with sun gear (13) and ring gear (9) respectively around described sun gear (13) is uniform, the unilateral bearing (11) on the ring platform is connected with front case (10) described ring gear (9) in the front case (10) by being arranged at, the planet axis (5) of described planetary pinion (6) is connected with planet carrier (8) by the bearing (7) that is arranged on the planet carrier (8), passes back-up ring (3) with the mode of the off-centre eccentric shaft (4) that has been rigidly connected being positioned at the end of planet axis (5) with respect to planetary pinion (6); The output shaft (31) that described planet carrier (8) is rigidly connected and extends to rear case (32) inside and be connected with rear case (32) by bearing, the clutch end of described output shaft (31) is connected with gearshift axle (30) by spline, radial equipartition is provided with several quantity plunger case (18) identical with described planetary pinion (6) on the hub that is positioned between output shaft (31) and the described planet carrier (8), place the inner plunger (20) of described plunger case (18) to fit together by top, side (21) and the lower pressure wheel (2) that is sleeved on the eccentric shaft (4), and between the intracavity bottom of described plunger case (18) and plunger (20), be provided with spring (19); The axis central part of described output shaft (31) is provided with oil input channel (23), one end of described oil input channel (23) is connected with plunger case (18) by one-way valve (17), and the other end is connected through the in line check valve (39) outside with being arranged on rear case (32) of the oil groove (41) on output shaft (31) cylindrical; Go up around uniform several quantity oil expulsion channel (24) identical with plunger case (18) that be provided with of oil input channel (23) at described output shaft (31), one end of described oil expulsion channel (24) is connected with plunger case (18), and the other end is connected through the oil groove (41) on output shaft (31) cylindrical and by oil extraction adjusting mouthful (25) oil extraction one-way valve (26) outside with being arranged on rear case (32); Described oil extraction is regulated mouthful (25) and is arranged on axially parallel with output shaft (31) and be horizontally through oil extraction adjustable lever (27) stage casing of oil expulsion channel (24), the both sides of passing oil expulsion channel (24) at oil extraction adjustable lever (27) are provided with stuffing box gland, the circle of deciding that is provided with Returnning spring (38) of one end of described oil extraction adjustable lever (27) and thrust-bearing (36) fits, the other end fits with push rod (29) front end that is with Returnning spring (28), and the rear end of described push rod (29) fits with the shift fork (63) that is arranged in the inner chamber of gearshift case (43) top; The moving-coil of described thrust-bearing (36) fits by wedge shape change (35) and the little inclined-plane that is installed in the wedge shape centrifugal (33) on the output shaft (31) in the mode that is slidingly matched, and thrust-bearing (36) is connected with the slide rail (37) that is arranged on the interior ring of rear case (32) platform periphery in the mode that is slidingly matched; Described shift fork (63) is sleeved on the declutch shift shaft (59) of fixedlying connected with the case case lid (64) of shifting gears, and the upper end of described shift fork (63) is hinged with the lever (66) that stretches out gearshift case case lid (64), and the lower end is nested in the peripheral groove of power shift gear (58); Described power shift gear (58) is contained on the cylindrical spline of gearshift axle (30) by the inner spline housing of circle in being arranged on, and the two ends cylindrical of described power shift gear (58) all offers teeth groove, the teeth groove of described power shift gear (58) two ends cylindrical can be respectively and the intermediate gear (48) of reverse gear apparatus by the slip of power shift gear (58) on gearshift axle (30), the internal tooth (57) of rear output shaft (56) is meshed, described rear output shaft (56) is provided with for the external tooth (54) that connects reverse gear apparatus being positioned at gearshift case (43) inside, and the pto end of rear output shaft (56) stretches out the outside of gearshift case (43).

2. planet hydraulic resultant force CVT (continuously variable transmission) according to claim 1, it is characterized in that: described reverse gear apparatus comprises and is fixed in intermediate gear (48) on the jack shaft (52) and that be meshed with the cylindrical teeth groove of the corresponding side of power shift gear (58), be located at the reversing shaft (45) of gearshift case (43) intracavity bottom by bearing bracket stand, and be fixed on the little tumbler gear (44) that reversing shaft (45) two ends are meshed with the external tooth (54) of intermediate gear (48) and rear output shaft (56) respectively, big tumbler gear (49), described jack shaft (52) is installed on the support (51) of gearshift case (43) inner chamber by sliding bearing.

3. planet hydraulic resultant force CVT (continuously variable transmission) according to claim 1 is characterized in that: described wedge shape centrifugal (33) is nested in the mode that is slidingly matched and is fixedly installed on output shaft (31) and changes in the sliding sleeve (34) of hub rear sidewall.

4. planet hydraulic resultant force CVT (continuously variable transmission) according to claim 1 is characterized in that: described declutch shift shaft (59) be provided with three match with the projection of shift fork (63) be used for the fixedly positioning pit of gear (60).

5. planet hydraulic resultant force CVT (continuously variable transmission) according to claim 1, it is characterized in that: described sun gear (13), planetary pinion (6) are cylindric spiral gear.

6. planet hydraulic resultant force CVT (continuously variable transmission) according to claim 1 is characterized in that: the bearing (7) that matches between described planet axis (5) and the planet carrier (8) is the needle-type bearing