CN203285929U

CN203285929U - Automatic stepless transmission with planetary and hydraulic resultant force

Info

Publication number: CN203285929U
Application number: CN2013203328042U
Authority: CN
Inventors: 王宪平
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-06-09
Filing date: 2013-06-09
Publication date: 2013-11-13
Anticipated expiration: 2023-06-09

Abstract

The utility model discloses an automatic stepless transmission with planetary and hydraulic resultant force. The automatic stepless transmission with the planetary and hydraulic resultant force organically combines a planetary speed reducing start-up system, a plunger hydraulic forced speed control system and a centrifugal force automatic random regulating and control system together. The rigidity characteristics that planetary transmission is large in gear ratio and transmission power, the flexible characteristics of the plunger hydraulic system which is strong in overload resistance, impact resistance and stepless speed change performance and the characteristic that a centrifugal force control device is strong in randomness are performed fully, and therefore simple, efficient and reliable large gear ratio and power stepless automatic speed changing transmission of high power are achieved.

Description

Planet hydraulic resultant force CVT (continuously variable transmission)

Technical field

The utility model relates to a kind of speed changer, particularly a kind of by planetary reduction gear start, the combination of hydraulic forced speed change, the automated randomized regulation and control of centrifugal force, thereby realize the planet hydraulic resultant force CVT (continuously variable transmission) of 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 the deficiencies such as less, the overload-resistant and impact resistance of transmitted power is poor; Not only transmitted power is limited by hydraulic transmission that oil hydraulic pump and oil hydraulic motor form, and transmission efficiency is also lower; Though adopt the speed changer of fluid torque converter that many advantages are arranged, also have the deficiencies such as functional reliability is poor, structure is more complicated, and price is more expensive.

Summary of the invention

The purpose of this utility model provides a kind of planet hydraulic resultant force CVT (continuously variable transmission) that can improve existing CVT (continuously variable transmission) deficiency just for existing deficiency in above-mentioned prior art.

The purpose of this utility model can realize by following technique measures:

planet hydraulic resultant force CVT (continuously variable transmission) of the present utility model 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 front case and is arranged on planet carrier and is arranged at front case inside, be provided with sun gear at input shaft on the shaft part between bearing and bearing, be provided with around described sun gear is uniform the planetary pinion that several are meshed with sun gear and ring gear respectively, described ring gear is connected with front case by being arranged at the unilateral bearing on the ring platform in front case, described planetary planet axis is connected with planet carrier by the bearing that is arranged on planet carrier, pass back-up ring with respect to a planetary end and be connected to eccentric shaft with the mode rigid connecting of bias being positioned at planet axis, described planet carrier rigid connecting is connected to the output shaft that extends to rear case inside and by bearing, with rear case, be connected, the clutch end of described output shaft has shifting shaft by spline joint, radial equipartition is provided with several quantity plunger case identical with described planetary pinion on the hub between output shaft and described planet carrier, the plunger that is placed in described plunger case inside fits together by the lower pressure wheel that Fang Dingyu is sleeved on eccentric shaft, and is provided with spring between the intracavity bottom of described plunger case and plunger, 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, move into uniform several quantity oil expulsion channel identical with plunger case that be provided with of oil duct in described output shaft pressed on ring, one end of described oil expulsion channel is connected with plunger case, and the other end passes through the oil groove on the output shaft cylindrical and by oil extraction, regulates mouth and is connected with the oil extraction one-way valve that is arranged on the rear case outside, 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 determining that is provided with Returnning spring of one end of described oil extraction adjustable lever and thrust-bearing fits, the other end has the push rod front end of Returnning spring to fit with cover, and the rear end of described push rod fits with the shift fork that is arranged in 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 arranged on the wedge shape centrifugal-block on output shaft in the mode that is slidably matched, and thrust-bearing with the mode that is slidably 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 that is fixedly 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 lower end is nested in the peripheral groove of power shift gear, described power shift gear is contained on the cylindrical spline of shifting shaft by the inner spline housing that is arranged on inner circle, and the two ends cylindrical of described power shift gear all offers teeth groove, slip on shifting shaft can be meshed with the intermediate gear of reverse gear apparatus, the internal tooth of rear output shaft respectively the teeth groove of described power shift gear two ends cylindrical by power shift gear, 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＝power take-off end of rear output shaft stretches out the outside of gearshift case.

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

Wedge shape centrifugal-block described in the utility model is nested in and is fixedly installed in the sliding sleeve that output shaft turns the hub rear sidewall in the mode that is slidably matched.

Be provided with on declutch shift shaft described in the utility model three match with the projection of shift fork be used for the fixedly positioning pit of gear.

Sun gear described in the utility model, planetary pinion are cylindric spiral gear.

The bearing that matches between planet axis described in the utility model and planet carrier is the needle-type bearing.

Principle of the present utility model is as follows:

One, by the sun gear of input shaft and consubstantiality, planet carrier and planetary pinion mounted thereto, through unilateral bearing be arranged on front case and can only with the ring gear of sun gear rotating in same direction, and and the common gearing down system that forms 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 forms 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 upper top power of spring and the centrifugal upper top gravity 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, because oil input channel is sealed by in line check valve and can only discharge hydraulic oil from oil expulsion channel.importantly, the effect of plunger hydraulic pump in the utility model is not the common pressure oil that provides, but utilize its pump internal pressure that reaction force is provided, in case namely the pressure of oil hydraulic pump 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 very soon rotation, 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 the Integral synchronous rotation of planetary system, stepless change reaches peak value, this moment, the speed ratio of input shaft and output shaft was 1: 1.

Three, be arranged on wedge shape centrifugal-block and sliding sleeve that output shaft turns hub rear side facade, be arranged on thrust-bearing and wedge shape change on the ring platform slide rail in rear case, the oil extraction adjustable lever, the Returnning spring that cross oil expulsion channel in rear case that are arranged on the thrust-bearing back formed infinite variable speed automated randomized regulator control system.The centrifugal gravity that while its role is to utilize output shaft rotation, the wedge shape centrifugal-block produces because of its weight, 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 wedge shape centrifugal-block centrifugal force reduces, the strength of Returnning spring will promote oil extraction adjustable lever, thrust-bearing and wedge shape change, the wedge shape centrifugal-block resets.The process that this is closed oil expulsion channel or is opened, be exactly the process of centrifugal force regulating controller auto-control plunger hydraulic pump internal pressure, is also the infinite variable speed process of auto-control.

Four, facade is connected with the gearshift case after rear case, wherein, by shifting shaft transferring power after spline joint of output shaft and gearshift case, by the lever and the shift fork that are enclosed within power shift gear on the shifting shaft spline, be arranged on the gearshift case lid, carries out gearshift.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 accompanying drawing 1, meshed the reverse gear train to rear output shaft external tooth driven loads by power shift gear, during this state, shift fork has withstood forward the push rod that is arranged in the front cinclides of gearshift case and shifting shaft fore poppet hole, push rod has held out against forward the oil extraction adjustable lever on the rear case, while making the reverse gear operation, stepless automatic transmission is inoperative, and load can only be with the gear ratio operation of setting; After hanging up neutral, power shift gear does not mesh any gear, therefore not transmission; Hang up forward gear and by power shift gear, meshed the internal tooth of rear output shaft, for load provides stepless automatic transmission power.

in sum, interaction between each system of this CVT (continuously variable transmission) is placed in actual motion and can simply be expressed as: hang up the input of forward gear-power and make planetary system with the centrifugal force automatic regulating system work that rotarily drives of maximum gear ratio bringing onto load starting-input shaft and to oil expulsion channel, start oil extraction and do not press to increase in smooth-plunger hydraulic pump and cause planetary pinion rotation deceleration, the ring gear starting, the common Accelerating running of output shaft and the dynamic load of rear output shaft band-centrifugal force strengthens, the centrifugal force automatic regulating system make the oil expulsion channel oil extraction more difficult-press in plunger hydraulic pump larger, so circulation, oil expulsion channel is very fast to be sealed and is caused plunger hydraulic pump fully and stopped back and forth, planetary pinion stops reverse rotation, the planetary system Integral synchronous rotates and with dynamic load, with the gear ratio of 1: 1, moves, stepless automatic transmission reaches peak value, otherwise, if this moment, load resistance increased (as automobile up slope, brake), perhaps input power reduces (as subtracting throttle), and above process is with antikinesis, until the interaction force transient equilibrium between each system, load will travel at the uniform speed with certain gear ratio, perhaps speed changer, according to the random auto-control stepless change ratio of the variation of resistance, power, makes load continue the acceleration or deceleration operation.

The beneficial effects of the utility model are as follows:

CVT (continuously variable transmission) of the present utility model 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 large, transmitted power is large, 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 large gear ratio, the transmission of powerful power stepless automatic transmission.

Description of drawings

Fig. 1 is that side of the present utility model is cutd open structural representation.

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

In 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, shifting shaft; 31, output shaft; 32, rear case; 33, wedge shape centrifugal-block; 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, large 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 utility model 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 utility model and sun gear 13 consubstantialities also are arranged on front case 10 centers through bearing 16, and its rear end is in bearing 12 is arranged on the center hole of planet carrier 8; Ring gear 9 is arranged on through unilateral bearing 11 on the interior ring platform of front case 10, and unilateral bearing 11 makes ring gear 9 can only equally with sun gear 13 do forward rotation; Be arranged 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 planet axis 5, eccentric shaft 4 consubstantialities also are arranged in several holes of planet carrier 8 circumference through bearing 7, lower pressure wheel 2 is enclosed within on eccentric shaft 4 in addition, back-up ring 3 is arranged on lower pressure wheel 2 two ends, and the effect of back-up ring 3 is to be worked in lower pressure wheel 2 and top, side 21 between back-up ring.The top, side 21 of plunger 20 and consubstantiality is housed 18 li of plunger cases, has spring 19 that top power is provided under plunger 20, top 21, the side of making keeps with lower pressure wheel 2 state that offsets; There is oil input channel 23 at output shaft 31De center below plunger case 18, its front end leads to several plunger cases 18 through one-way valve 17, 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 rear case 32, make the hydraulic oil (not showing hydraulic oil container and filter cleaner in figure) after plunger case 18 can filter by the oil inlet pipe inspiration in line check valve 39, two one-way valves in this oil feeding system can ensure that hydraulic oil only advances not arrange; Also be provided with the oil expulsion channel 24 identical with plunger case quantity in output shaft 31, its front end is to the end rear side of plunger case 18, 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; Advancing, in the middle of oil-discharge trough 41 and the hole wall circumference at rear case 32 rear portions of both sides three seals ring 40 is housed, do not leak from the microgap of output shaft and rear case hole wall in order to ensure hydraulic oil, and advance, do not alter oil between oil-discharge trough.The rear side circumference facade that turns hub at output shaft 31 is fixed with several sliding sleeves 34, the wedge shape centrifugal-block 33 that is the four sides cylinder is placed in sliding sleeve 34, wedge shape change 35 inclined-planes of the little inclined-plane of its sphenocephaly and rear side intersect, and the large inclined-plane of its sphenocephaly prevents that centrifugal-block and back-up ring 3 from reaching the fixedly bolt of lower pressure wheel 2 and colliding; 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 hole in thrust-bearing 36 back rear cases, an oil extraction adjustable lever 27 is housed, the thin section 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 plays the sealing oil expulsion channel and ensures the effect that hydraulic oil does not leak; Rear case along thrust-bearing 36 back circumference is provided with several half dark hole, Returnning spring 38 is housed in hole heads on thrust-bearing 36, wherein Returnning spring 28 because of position by on the shared push rod 29 that has been enclosed within back of thrust adjustable lever 27.The rear facade of rear case 32 connects as one by screw 42 with the antetheca of gearshift case 43, and by output shaft 31 through spline joint shifting shaft 30, and shifting shaft 30 front ends are before bearing is arranged on the gearshift case in cinclides, and rear end is arranged in rear output shaft 56 center holes through sliding bearing 55; On gearshift case case lid 64, lever support 65 is installed, lever 66 is housed on the lever support, two supports are arranged below case lid 64, on rack-mount declutch shift shaft 59, cover has shelves fork 63 and is 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 shift fork withstands on small ball in positioning pit and guarantees the unlikely generation deviation of gear in certain thrust, in order to avoid affect the normal operation of each gear; Gearshift is provided with three gears, lever 66 pushes away forward as forward gear, this moment, power shift gear 58 meshed the internal tooth 57 that is arranged on the rear output shaft 56 on gearshift case rear wall through bearing, due to power shift gear 58 through spline housing on the keyway of shifting shaft 30, and the spline head of shifting shaft 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 neutral position, power shift gear 58 does not mesh other gear; Lever 66 post-tensionings are reverse gear while making shift fork 63 be in front position, this moment, reverse gear 58 meshed intermediate gear 48, intermediate gear 48 meshes again little tumbler gear 44, be fixed on equally 49 of large tumbler gears on reversing shaft 45 with little tumbler gear 44 and meshed the external tooth 54 of rear output shaft 56, make rear output shaft 56 be the backward rotation state; In the reverse gear system, intermediate gear 48 is fixed on jack shaft 52 through spline 53, and jack shaft 52 front ends are before sliding bearing 47 is arranged on the gearshift case in cinclides, and rear end is arranged on support 51 through sliding bearing; Little tumbler gear 44 and reversing shaft 45 consubstantialities, large 49 of tumbler gears are fixed on reversing shaft 45 through spline 50, and reversing shaft 45 front end and back end are arranged in the cinclides of gearshift case front and back through bearing respectively; Importantly, shift fork 63 has withstood the push rod 29 that can move forward and backward in front 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 occur when reverse gear is moved, if thereby when the planet row gear ratio is 5: 1, the gear ratio that output shaft 31 passes to shifting shaft 30 is still 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 larger.In the utility model, 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 arranged on simultaneously on 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 front case (10) and the bearing (12) that is arranged on planet carrier (8) is arranged at front case (10) inside, on being positioned at shaft part between bearing (12) and bearing (16), input shaft (14) is provided with sun gear (13), be provided with around described sun gear (13) is uniform the planetary pinion (6) that several are meshed with sun gear (13) and ring gear (9) respectively, described ring gear (9) is connected with front case (10) by being arranged at the unilateral bearing (11) on the ring platform in front case (10), the planet axis (5) of described planetary pinion (6) is connected with planet carrier (8) by the bearing (7) that is arranged on planet carrier (8), pass back-up ring (3) and be connected to eccentric shaft (4) with the mode rigid connecting of bias being positioned at the end of planet axis (5) with respect to planetary pinion (6), described planet carrier (8) rigid connecting is connected to the output shaft (31) that extends to rear case (32) inside and by bearing, with rear case (32), be connected, the clutch end of described output shaft (31) has shifting shaft (30) by spline joint, 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 described planet carrier (8), the plunger (20) that is placed in described plunger case (18) inside pushes up (21) by side and fits together with the lower pressure wheel (2) that is sleeved on eccentric shaft (4), and be provided with spring (19) between the intracavity bottom of described plunger case (18) and plunger (20), 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, move into uniform several quantity oil expulsion channel (24) identical with plunger case (18) that be provided with of oil duct (23) in described output shaft (31) pressed on ring, one end of described oil expulsion channel (24) is connected with plunger case (18), and the other end passes through the oil groove (41) on output shaft (31) cylindrical and by oil extraction, regulates mouthful (25) oil extraction one-way valve (26) outside with being arranged on rear case (32) and is connected, 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 determining 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 and cover have push rod (29) front end of Returnning spring (28) to fit, 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 arranged on the wedge shape centrifugal-block (33) on output shaft (31) in the mode that is slidably 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 slidably matched, described shift fork (63) is sleeved on the declutch shift shaft (59) that is fixedly connected with the case case lid (64) of shifting gears, the upper end of described shift fork (63) is hinged with the lever (66) that stretches out gearshift case case lid (64), and 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 shifting shaft (30) by the inner spline housing that is arranged on inner circle, 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 shifting shaft (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＝power take-off 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 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, large 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-block (33) is nested in and is fixedly installed in the sliding sleeve (34) that output shaft (31) turns the hub rear sidewall in the mode that is slidably matched.

4. planet hydraulic resultant force CVT (continuously variable transmission) according to claim 1 is characterized in that: be provided with on described declutch shift shaft (59) 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 planet carrier (8) is the needle-type bearing.