CN210344179U - Tractor and power transmission device - Google Patents
Tractor and power transmission device Download PDFInfo
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- CN210344179U CN210344179U CN201920592293.5U CN201920592293U CN210344179U CN 210344179 U CN210344179 U CN 210344179U CN 201920592293 U CN201920592293 U CN 201920592293U CN 210344179 U CN210344179 U CN 210344179U
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Abstract
The utility model provides a tractor and a power transmission device thereof, wherein the power transmission device comprises a front axle, a clutch, a speed reducer, a speed changer, a hydraulic pump, a hydraulic motor and a plurality of universal transmission devices, and the front axle is connected with the speed changer through the universal transmission devices; the speed reducer is arranged on the clutch, and the clutch is connected with the speed changer through the universal transmission device; the speed reducer comprises an input shaft, the hydraulic pump is arranged on the input shaft, and the input shaft drives the hydraulic pump to rotate when rotating; the transmission comprises a speed change assembly, the speed change assembly comprises a direct-connected input shaft and an intermediate shaft, the intermediate shaft and the direct-connected input shaft are arranged in parallel, and an auxiliary input shaft is further sleeved on the direct-connected input shaft; the hydraulic motor is fixedly arranged at one end of the intermediate shaft and can provide power for the direct-connected input shaft and/or the auxiliary input shaft.
Description
Technical Field
The utility model relates to a tractor machinery, in particular to tractor and power transmission device.
Background
The articulated tractor adopts the articulated frame, and the pin joint of frame turns to around the vehicle operation in-process deflects, has to turn to the radius little, and the maneuverability is strong, is the relatively ideal machines in southern hilly mountain area transportation and paddy field operation in-process. Articulated tractors are typically longer than wheeled tractors due to the added articulation point in the middle of the frame as a result of using articulated point steering. At present, the articulated hillside tractor widely used in the market is mainly arranged at the rear end of a transmission, and the length of a machine body is difficult to shorten due to the structure. As the horsepower of agricultural machines increases, the engine and its power plant are constructed longer, resulting in increased length of the airframe, which reduces the maneuverability of the articulated vehicle.
The articulated mountain tractor can be used for road transportation and field operation, and has the advantages of wide operation range, complex working condition change and difficulty in meeting the complex working condition requirement due to single manual speed change. Therefore, how to provide a tractor and a power transmission device thereof, which are convenient in speed change and gear shift, strong in working condition adaptability and high in transmission efficiency and can realize the input of various power sources, becomes a technical problem which needs to be solved urgently by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the tractor and the power transmission device thereof have the advantages of convenience in speed change and gear shift, strong working condition adaptability and high transmission efficiency, and can realize input of various power sources.
The utility model discloses a solution is realized like this: the utility model provides a power transmission device, which is characterized in that the power transmission device comprises a front axle, a clutch, a speed reducer, a speed changer, a hydraulic pump, a hydraulic motor and a plurality of universal transmission devices, wherein the front axle is connected with the speed changer through the universal transmission devices; the speed reducer is arranged on the clutch, and the clutch is connected with the speed changer through the universal transmission device; the speed reducer comprises an input shaft, the hydraulic pump is arranged on the input shaft, and the input shaft drives the hydraulic pump to rotate when rotating; the transmission comprises a speed change assembly, the speed change assembly comprises a transmission case body, and a direct-connected input shaft and an intermediate shaft which are arranged in the transmission case body, the intermediate shaft and the direct-connected input shaft are arranged in parallel, and an auxiliary input shaft is further sleeved on the direct-connected input shaft; the hydraulic motor is fixedly arranged at one end of the intermediate shaft and can provide power for the direct-connected input shaft and/or the auxiliary input shaft. The power transmission device of this structure through installing the hydraulic pump on the reduction gear, hydraulic motor installs on the derailleur, has realized that hydraulic motor and machinery directly link transmission multisource power input, makes the transmission efficiency of tractor higher, the variable speed is shifted more convenient, operating mode adaptability is stronger and the operation field is wider.
The utility model discloses an another technical scheme lies in on above-mentioned basis, the reduction gear still includes reduction box and sets up the reduction box lid on reduction box, the internal output shaft that is equipped with of reduction box, the output shaft with input shaft parallel arrangement, be equipped with the input shaft driving gear on the input shaft, still be equipped with output shaft driven gear on the output shaft.
Another technical solution of the present invention is that, on the basis, a first gear driving gear, a second gear driving gear, a third gear driving gear and a fourth gear driving gear are sequentially disposed on the auxiliary input shaft, and the first gear driving gear, the second gear driving gear, the third gear driving gear and the fourth gear driving gear are respectively disposed on the auxiliary input shaft through spline sleeves; or the first gear driving gear and the second gear driving gear can also form an integrated structure with the auxiliary input shaft.
Another technical solution of the present invention is that, on the basis of the above, a plurality of bearings are disposed between the auxiliary input shaft and the direct-connected input shaft, and the direct-connected input shaft is disposed on the transmission case through the plurality of bearings; and a check ring is arranged between the three-gear driving gear and the four-gear driving gear, and the three-gear driving gear and the four-gear driving gear are positioned through a snap ring and an axial step on the auxiliary input shaft.
Another technical solution of the present invention is that on the basis, the intermediate shaft is sequentially provided with a first-gear driven gear, a second-gear driven gear, a third-gear driven gear and a fourth-gear driven gear, and the first-gear driven gear, the second-gear driven gear, the third-gear driven gear and the fourth-gear driven gear are respectively sleeved on the intermediate shaft through bearings; bearings are arranged between the first-gear driven gear and the gearbox body and between the fourth-gear driven gear and the gearbox body; one keep off driven gear with between the bearing, keep off between two driven gear and the three keep off driven gear and four keep off driven gear with all be equipped with footstep bearings between the bearing, just keep off driven gear, two keep off driven gear, three keep off driven gear and four keep off the relative rotation of driven gear all can the speed of difference.
Another technical solution of the present invention is that, on the basis of the above, a second-gear spline hub and a third-fourth-gear spline hub are further disposed on the intermediate shaft, the second-gear spline hub is disposed between the first-gear driven gear and the second-gear driven gear, and the third-fourth-gear spline hub is disposed between the third-gear driven gear and the fourth-gear driven gear; a first gear engaging sleeve and a second gear engaging sleeve are arranged on the periphery of the first gear spline hub and can move left and right along the first gear spline hub; and a third-gear and a fourth-gear engaging sleeve are arranged on the periphery of the third-gear and fourth-gear spline hub and can move left and right along the third-gear and fourth-gear spline hub.
Another technical solution of the present invention is that, on the basis of the above, a power switching gear is further disposed on the auxiliary input shaft, and the power switching gear is disposed on the auxiliary input shaft through a spline; and a power switching shifting fork is further arranged on one side of the power switching gear, and under the action of the power switching shifting fork, the power switching gear can move left and right along the auxiliary input shaft.
Another technical solution of the present invention is that on the basis of the above, one side of the first and second engaging sleeves is further provided with a first and second shifting fork, and under the action of the first and second shifting fork, the first and second engaging sleeves can move left and right along the first and second spline hubs; and a third-gear and a fourth-gear shifting fork are further arranged on one side of the third-gear and fourth-gear joint sleeve, and the third-gear and fourth-gear joint sleeve can move left and right along the third-gear and fourth-gear spline hub under the action of the third-gear and fourth-gear shifting fork.
The other technical scheme of the utility model is that on the basis, the transmission also comprises a front drive component, a main speed reduction component and a power output component which are arranged in the transmission box body; the front drive assembly comprises a front drive shaft and a front drive shaft joint sleeve arranged on the front drive shaft, and a front drive shifting fork is further arranged at one end of the front drive shaft joint sleeve; the main speed reducing assembly comprises a rear drive shaft arranged at one end of the front drive shaft, a rear drive shaft driven gear and a rear drive driving bevel gear which are arranged on the rear drive shaft, and a main speed reducer is further arranged at one end of the rear drive driving bevel gear, which is far away from the rear drive shaft driven gear; the power output assembly comprises a PTO input shaft, a second intermediate shaft and a PTO shaft, wherein the second intermediate shaft and the PTO shaft are arranged in parallel with the PTO input shaft; the PTO input shaft is sequentially provided with a high-speed gear driving gear, a high-speed and low-speed gear spline hub, a low-speed gear driving gear, a high-speed and low-speed gear engaging sleeve and a high-speed and low-speed gear shifting fork; a gear driven gear, a PTO driving gear and a slow gear driven gear are arranged on the second intermediate shaft; and a PTO shaft driven gear is arranged on the PTO shaft.
On the other hand, the utility model also provides a tractor, including power transmission device, power transmission device is as above power transmission device.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation.
Fig. 1 is a schematic structural view of a tractor according to the present invention;
FIG. 2 is a schematic illustration of the transmission system of FIG. 1;
FIG. 3 is a schematic illustration of the construction of the retarder of FIG. 1;
FIG. 4 is a schematic structural diagram of the transmission of FIG. 1;
FIG. 5 is a transmission shift diagram;
FIG. 6 is a schematic illustration of the transmission in reverse gear;
fig. 7 is a schematic structural view of the power output assembly.
The corresponding relation of the reference signs is as follows:
1 engine 2 chassis 3 frame
4 cab 5 suspension device
31 front frame 32 hinge point 33 rear frame
41 instrument desk 42 operating mechanism 43 seat
51 front counterweight 52 suspension lifter
A front axle B clutch C speed reducer
Universal X part of D-speed transmission E universal transmission device
An input shaft of a C2 reduction box cover C3 of the C1 reduction box body,
C4 output shaft C5 output shaft driven gear C6 hydraulic pump
D1 speed changing assembly D2 precursor assembly D3 main speed reducing assembly
D5 hydraulic motor of D4 power output assembly
X1 end cover X2 bearing X3 bolt
X4 sealing ring X5 retaining ring X6 flange
X7 thrust sleeve X8 sleeve X9 end cap
X10 snap ring
S0 direct-connection input shaft S1 auxiliary input shaft G10 hydraulic input gear
G11 Power switching Gear G12 four speed drive Gear G13 three speed drive Gear
G14 two-gear driving gear G15 three-first-gear driving gear
S2 middle shaft G21 four-gear driven gear G22 three-four-gear spline hub
G23 three-gear driven gear G24 two-gear driven gear G25 two-gear spline hub
G26 first gear driven gear J1 second gear engaging sleeve J2 third and fourth gear engaging sleeve
B1 two-gear shifting fork B2 three-four-gear shifting fork B3 forerunner shifting fork
S3 front driving shaft J3 front driving joint sleeve
S4 rear drive shaft G41 rear drive shaft driven gear G42 rear drive driving bevel gear
D31 main reducer
S5PTO input shaft G51 fast gear driving gear G52 fast and slow gear spline hub
G53 slow gear driving gear J4 fast and slow gear engaging sleeve B4 fast and slow gear shifting fork
G61 fast driven gear G62PTO driving gear G63 slow driven gear
S6 second countershaft S7PTO shaft G71PTO shaft driven gear
Detailed Description
The present invention will be described in detail with reference to the drawings, which are provided for illustrative and explanatory purposes only and should not be construed as limiting the scope of the present invention in any way. Furthermore, features from embodiments in this document and from different embodiments may be combined accordingly by a person skilled in the art from the description in this document.
In one embodiment, referring to the tractor and its power transmission device shown in fig. 1 to 7, specifically, as shown in fig. 1, the tractor includes an engine 1, a chassis 2, a frame 3, a cab 4 and a suspension device 5. The chassis includes a drive train and a travel system. The frame 3 comprises a front frame 31, a hinge point 32 and a rear frame 33. The cab 4 includes a meter table 41, an operating mechanism 42, and a seat 43. The suspension arrangement comprises a front counterweight 51 and a suspension riser 52.
As shown in fig. 1 and 2, the transmission system includes a front axle a, a clutch B, a reducer C, a transmission D, and a universal transmission E. The running system comprises a suspension and wheels W, and certainly, the suspension can be not used for a tractor mainly used for field operation. The front end of the clutch B is installed on the engine A, the rear end of the clutch B is installed with the speed reducer C, the hinge point 32 is installed on the speed reducer C, the front frame 31 is installed on the engine 1, the front axle A and the counterweight 51 are installed on the front frame 31, and the front frame 31, the front axle A, the engine 1, the clutch B and the speed reducer C form a front machine body. The front body can be deflected about the hinge point 32, the rear frame 33 is mounted on the hinge point 32, the transmission D is mounted on the rear frame 33, the cab 4 is mounted on the transmission D, and the suspension risers 52 are mounted on the transmission D.
The front end of the clutch B is arranged on an engine A, the rear end of the clutch B is provided with a speed reducer C, a front drive assembly D2 of the speed changer transmits power to a front axle A through a universal transmission device E, and in order to improve the power transmission efficiency, if a suspension is not arranged on the front axle A, the input end of the front axle A is coaxial with the output end of a front drive assembly D2. If the front axle is provided with a suspension, the input of the front axle a is coaxial with the output of the front drive assembly D2 allowing only a small amount of roll. The front drive component D2 is in a normally disconnected state, the tractor is driven by a rear wheel when running normally, and the front drive is switched in only when the rear drive slips, so that four-wheel drive of the tractor is realized. The hydraulic pump C6 is splined to the input shaft C3, the hydraulic motor D5 is mounted to the transmission D, and the hydraulic input gear G10 is splined to the hydraulic motor D5.
The hinge point 32 is installed on the speed reducer C, the rear frame 33 is installed on the hinge point 32, the speed changer D is installed on the rear frame 33, and the auxiliary input shaft S1 of the speed changer D is connected with the output shaft C4 of the speed reducer C through the universal transmission device E. The universal transmission device E between the speed changer D and the speed reducer C is a duplex constant-speed universal joint, and the joint of the duplex constant-speed universal joint is on the axis extension line of the frame hinge point 32.
As shown in fig. 3, the reduction gear C includes a reduction gear case C1, a reduction gear case cover C2, an input shaft C3, an output shaft C4, an output shaft driven gear C5, and a hydraulic pump C6.
As shown in fig. 4, the transmission D includes a transmission assembly D1, a front drive assembly D2, a final drive assembly D3, a power take-off assembly D4, and a hydraulic motor D5. And a plurality of universal parts X are arranged on the speed reducer C and the speed changer D.
More specifically, an input shaft driving gear is machined on an input shaft C3 of the speed reducer C, the input shaft C3 is supported on a speed reducer box C1 through a bearing X2, and two ends of the input shaft C3 are positioned through an end cover X1 and fixed on the box through a bolt X3. An output shaft driven gear C5 is sleeved on an output shaft C4 through a spline, an output shaft driven gear C5 is positioned on an output shaft C5 through a retainer ring X5, an output shaft C5 is supported on a reduction box body C1 through a bearing X2, two ends of the output shaft C1 are positioned through an end cover X1, and the output shaft C3 is fixed on the box body through a bolt X3. A power input end of the input shaft C3 and a power output end cover X1 of the output shaft C4 are provided with a sealing ring X4. The input shaft driving gear is normally meshed with the output shaft driven gear C5, the rotating speed of the output shaft is reduced through the transmission of the secondary gear, and the shaking of a transmission system in the large-angle power transmission process is reduced.
As shown in fig. 5, the gear shift assembly D1 includes a direct-coupled input shaft S0, a counter input shaft S1, a hydraulic input gear G10, a power switching gear G11, a fourth gear drive gear G12, a third gear drive gear G13, a second gear drive gear G14, and a first gear drive gear G15. The transmission comprises a countershaft S2, a four-gear driven gear G21, a three-four-gear spline hub G22, a three-gear driven gear G23, a two-gear driven gear G24, a two-gear spline hub G25, a first-gear driven gear G26, a two-gear engaging sleeve J1, a three-four-gear engaging sleeve J2, a power switching shift fork B0, a two-gear shift fork B1, a three-four-gear shift fork B2 and a common part X. The auxiliary input shaft S1 is sleeved on the direct-connected input shaft S0, and a plurality of bearings are arranged between the direct-connected input shaft S0 and the auxiliary input shaft S1. The universal part X mainly comprises an end cover X1, a bearing X2, a bolt X3, a sealing ring X4, a retainer ring X5, a flange X6, a thrust shaft sleeve X7, a shaft sleeve X8, an end cover X9 and a snap ring X10.
The power switching gear G11 is spline-mounted on the sub input shaft S1 and is axially slidable along the sub input shaft S1 under the control of the power switching fork B0. The first-gear driving gear G15, the second-gear driving gear G14, the third-gear driving gear G13 and the fourth-gear driving gear G12 are sleeved on the auxiliary input shaft S1 through splines, or the first-gear driving gear G15 and the second-gear driving gear G14 are directly machined on the auxiliary input shaft S1. The auxiliary input shaft S1 is supported on the direct-connected input shaft S0 through a bearing X2, the direct-connected input shaft S0 is supported on the box body through a bearing, and an external spline for outputting power is processed on the direct-connected input shaft S0. A retainer ring F6 is arranged between the fourth-gear driving gear G12 and the third-gear driving gear G13, and the fourth-gear driving gear G12 and the third-gear driving gear G13 are positioned through an auxiliary input shaft S1 shaft step and a snap ring X10.
The first-gear driven gear G26, the second-gear driven gear G24, the third-gear driven gear G23 and the fourth-gear driven gear G21 are freely sleeved on the intermediate shaft S2 through a shaft sleeve X8. The first-gear driven gear G26 and the bearing X2, the third-gear driven gear G23 and the second-gear driven gear G24 and the fourth-gear driven gear G21 and the bearing X2 are positioned by a thrust shaft sleeve X7, so that the groups of components can rotate relatively at different rotating speeds. The third-fourth speed spline hub G22 and the second-fourth speed spline hub G25 are sleeved on the intermediate shaft S2 through splines. The third-fourth speed engaging sleeve J2 is splined on the third-fourth speed splined hub G22 and can slide back and forth along the third-fourth speed splined hub G22. A second-gear engaging sleeve J1 is splined to a second-gear splined hub G25 and can slide back and forth along second-gear splined hub G25. The second-gear driven gear G24, the second-gear engaging sleeve J1, the second-gear spline hub G25 and the first-gear driven gear G26 form a second-gear switching module. The four-gear driven gear G21, the three-four-gear engaging sleeve J2, the three-four-gear spline hub G22 and the three-four-gear driven gear G23 form a three-four-gear switching module.
As shown in fig. 6, the front drive module D2 includes a front drive shaft S3, a front drive engaging sleeve J3 and a front drive fork B3, which are disposed on the front drive shaft S3, and the front drive engaging sleeve J3 can move left and right on the front drive shaft S3 under the action of the front drive fork B3. The main speed reducing assembly D3 comprises a rear drive shaft S4, a rear drive shaft S4 is arranged at the right end of the front drive shaft S3, and a rear drive shaft driven gear G41 and a rear drive bevel gear G42 are sequentially arranged on the rear drive shaft. The final drive D31 is provided at the right end of the rear drive shaft S4.
The rear drive shaft driven gear G41 is sleeved on the rear drive shaft S4 through a spline, the rear drive shaft driven gear G41 is in constant mesh with external teeth on a first-gear engaging sleeve J1, the rear drive shaft driven gear G41 is a wide gear, and a first-gear engaging sleeve J1 slides to be in constant mesh transmission with the rear drive shaft driven gear G41 when in neutral gear, first gear and second gear. A rear drive bevel gear G42 is machined on the rear drive shaft S4, and the rear drive bevel gear G42 transmits power to a driven bevel gear of the final drive D31. The rear drive shaft S4 is fixed on the box body through a bearing X2. The front drive shaft S3 is supported on the box body and the rear drive shaft S4 through a bearing X2 and a shaft sleeve X8, and the front drive shaft is provided with a front drive engaging sleeve J3 and a front drive shifting fork B3.
As shown in fig. 7, the power take-off assembly D4 includes a PTO input shaft S5, and a fast gear drive gear G51, a fast and slow gear spline hub G52, a slow gear drive gear G53, a fast and slow gear coupling sleeve J4, and a fast and slow gear shift fork B4 provided on the PTO input shaft S5. The power take-off assembly D4 further includes a second countershaft S6 disposed parallel to the PTO input shaft S5, and the second countershaft S6 is provided with a fast driven gear G61, a PTO drive gear G62 and a slow driven gear G63. The power take-off assembly D4 further includes a PTO shaft S7, the PTO shaft S7 being disposed parallel to the PTO input shaft S5, the PTO shaft being driven by the gear G71.
The principle of mechanical direct shifting is as follows:
the power switching B0 drives the power switching gear G11 to slide forwards, the external teeth of the power switching gear G11 are separated from the hydraulic input gear D10, the internal splines of the power switching gear G11 are simultaneously combined with the external splines of the direct-connected input shaft S0 and the external splines of the auxiliary input shaft, the power at the moment is input to the auxiliary input shaft S1 through the direct-connected input shaft S0, and the auxiliary input shaft S1 runs at a mechanical input rotating speed.
The hydrostatic stepless speed change gear shifting principle is as follows:
the power switching B0 drives the power switching gear G11 to slide backwards, the external teeth of the power switching gear G11 are meshed with the hydraulic input gear D10, the internal spline of the power switching gear G11 is directly connected with the external spline port of the input shaft S0, the internal spline of the power switching gear G11 is combined with the external spline of the auxiliary input shaft, the power at the moment is transmitted to the power switching gear G11 through the hydraulic input gear G10 by the hydraulic motor D5 and is input to the auxiliary input shaft S1, and the auxiliary input shaft S1 runs at a hydraulic stepless rotating speed.
It should be noted that the reverse gear is realized by hydrostatic stepless speed change, and the reverse gear cannot be obtained in mechanical direct gear shifting.
The first-second gear shifting principle is as follows:
a second gear sleeve J1 is in the neutral position, achieving a neutral gear between the first and second gears. The first-gear shifting fork B1 is operated to enable the first-gear engaging sleeve J1 to move backwards, so that an internal spline of the first-gear engaging sleeve J1 is combined with an external spline of the first-gear driven gear G26, power is transmitted to the first-gear driven gear G26 through the first-gear driving gear G15, is transmitted to the first-gear engaging sleeve J1 through an external spline of the first-gear driven gear G26, and is transmitted to the first-gear spline hub G25, so that the power is transmitted to the intermediate shaft S2, and the intermediate shaft S2 rotates in the first gear. The first-gear shifting fork B1 is operated to enable the first-gear engaging sleeve J1 to move forwards, so that an inner spline of the first-gear engaging sleeve J1 is combined with an outer spline of the second-gear driven gear G24, power is transmitted to the second-gear driven gear G24 through the second-gear driving gear G14, is transmitted to the first-gear engaging sleeve J1 through an outer spline of the second-gear driven gear G24, and is transmitted to the first-gear spline hub G25, so that the power is transmitted to the intermediate shaft S2, and the intermediate shaft S2 rotates in two gears.
The three-four gear shifting principle is as follows:
the third-fourth clutch J2 is in the neutral position, achieving neutral between third and fourth gears. The third-fourth gear shifting fork B2 is operated to enable the third-fourth gear engaging sleeve J2 to move backwards, so that an internal spline of the third-fourth gear engaging sleeve J2 is combined with an external spline of the third-fourth gear driven gear B39, power is transmitted to the third-fourth gear driven gear G23 from the third-gear driving gear G13, is transmitted to the third-fourth gear engaging sleeve J2 through the external spline of the third-fourth gear driven gear G23, is transmitted to the third-fourth gear spline hub G22, and is transmitted to the intermediate shaft S2, and the intermediate shaft S2 rotates in the third gear. The third-fourth gear shift fork B2 is operated to move the third-fourth gear engaging sleeve J2 forward, so that the internal spline of the third-fourth gear engaging sleeve J2 is engaged with the external spline of the fourth-gear driven gear G21, power is transmitted from the fourth-gear driving gear G12 to the fourth-gear driven gear G21, is transmitted to the third-fourth gear engaging sleeve J2 through the external spline of the fourth-gear driven gear G21, and is transmitted to the third-fourth gear spline hub G22, so that the power is transmitted to the intermediate shaft S2, and the intermediate shaft S2 rotates in four gears.
The four-wheel drive conversion principle is as follows:
the front drive shifting fork B3 drives the front drive joint sleeve J3 to slide backwards, the internal spline of the front drive joint sleeve J3 is simultaneously combined with the external splines of the front drive shaft S3 and the rear drive shaft S4, and the tractor is driven by four wheels. The front-drive shifting fork B3 drives the front-drive joint sleeve J3 to slide forwards, the internal spline of the front-drive joint sleeve J3 is only combined with the external spline of the front-drive shaft S3 and is not combined with the external spline of the rear-drive shaft S4, and the tractor is only driven by the rear wheel.
The PTO shift principle is as follows:
PTO fast gear: the fast and slow gear engaging sleeve J4 moves forward, the fast and slow gear engaging sleeve J4 is simultaneously combined with the fast and slow gear spline hub G52 and the external spline of the fast gear driving gear G51, and the PTO transmission is shifted to a fast gear. The power transmission route is as follows. PTO input shaft S5, to fast and slow gear spline hub G52, fast and slow gear engaging sleeve J4, fast gear driving gear G51, fast gear driven gear G61, second countershaft S6, PTO driving gear G62, PTO driven gear E10, PTO shaft S7.
PTO slow gear: the fast and slow gear engaging sleeve J4 moves backwards, the fast and slow gear engaging sleeve J4 is simultaneously combined with the fast and slow gear spline hub G52 and the external spline of the slow gear driving gear G53, and the PTO transmission is shifted to a slow gear. The power transmission route is as follows. PTO input shaft S5, to fast and slow gear spline hub G52, fast and slow gear engaging sleeve J4, slow gear driving gear G53, slow gear driven gear G63, second countershaft S6, PTO driving gear G62, PTO driven gear E10, PTO shaft S7.
The tractor and the power transmission device thereof with the structure have the advantages that:
firstly, because the derailleur postposition is installed and on the pin joint for the length of derailleur can not influence the length overall arrangement of tractor whole car, consequently, can effectively reduce the whole car length of tractor, improves its mobility and trafficability characteristic.
Secondly, through set up the hydraulic pump on the reduction gear, set up hydraulic motor on the derailleur, make the tractor can adopt two kinds of power supply inputs of machinery and hydraulic pressure, have two kinds of functions of mechanical direct connection and hydraulic pressure infinitely variable, be fit for using in the complicated occasion of operating mode change.
And thirdly, the hydraulic stepless speed change device is installed in front of the gear shifting mechanism in series to form a hydraulic stepless multi-gear speed, so that the power and torque range of the hydraulic stepless speed change device is wider, and the adaptability is stronger.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The power transmission device is characterized by comprising a front axle, a clutch, a speed reducer, a speed changer, a hydraulic pump, a hydraulic motor and a plurality of universal transmission devices, wherein the front axle is connected with the speed changer through the universal transmission devices;
the speed reducer is arranged on the clutch, and the clutch is connected with the speed changer through the universal transmission device;
the speed reducer comprises an input shaft, the hydraulic pump is arranged on the input shaft, and the input shaft drives the hydraulic pump to rotate when rotating;
the transmission comprises a speed change assembly, the speed change assembly comprises a transmission case body, and a direct-connected input shaft and an intermediate shaft which are arranged in the transmission case body, the intermediate shaft and the direct-connected input shaft are arranged in parallel, and an auxiliary input shaft is further sleeved on the direct-connected input shaft;
the hydraulic motor is fixedly arranged at one end of the intermediate shaft and can provide power for the direct-connected input shaft and/or the auxiliary input shaft.
2. The power transmission device according to claim 1, wherein the reduction gear further comprises a reduction box body and a reduction box cover arranged on the reduction box body, an output shaft is arranged in the reduction box body, the output shaft is arranged in parallel with the input shaft, an input shaft driving gear is arranged on the input shaft, and an output shaft driven gear is further arranged on the output shaft.
3. The power transmission device according to claim 2, wherein a first-gear driving gear, a second-gear driving gear, a third-gear driving gear and a fourth-gear driving gear are sequentially provided on the secondary input shaft, and the first-gear driving gear, the second-gear driving gear, the third-gear driving gear and the fourth-gear driving gear are respectively provided on the secondary input shaft through spline sleeves; alternatively, the first and second electrodes may be,
the first gear driving gear and the second gear driving gear can also form an integrated structure with the auxiliary input shaft.
4. The power transmission device as claimed in claim 3, wherein a plurality of bearings are provided between the auxiliary input shaft and the direct-connected input shaft, and the direct-connected input shaft is provided on the transmission case through the plurality of bearings;
and a check ring is arranged between the three-gear driving gear and the four-gear driving gear, and the three-gear driving gear and the four-gear driving gear are positioned through a snap ring and an axial step on the auxiliary input shaft.
5. The power transmission device according to claim 4, wherein a first-gear driven gear, a second-gear driven gear, a third-gear driven gear and a fourth-gear driven gear are sequentially provided on the intermediate shaft, and the first-gear driven gear, the second-gear driven gear, the third-gear driven gear and the fourth-gear driven gear are respectively sleeved on the intermediate shaft through bearings;
bearings are arranged between the first-gear driven gear and the gearbox body and between the fourth-gear driven gear and the gearbox body;
one keep off driven gear with between the bearing, keep off between two driven gear and the three keep off driven gear and four keep off driven gear with all be equipped with footstep bearings between the bearing, just keep off driven gear, two keep off driven gear, three keep off driven gear and four keep off the relative rotation of driven gear all can the speed of difference.
6. The power transmission device as claimed in claim 5, wherein a second-speed spline hub and a third-and-fourth-speed spline hub are further provided on the intermediate shaft, the second-speed spline hub being provided between the first-speed driven gear and the second-speed driven gear, the third-and-fourth-speed spline hub being provided between the third-speed driven gear and the fourth-speed driven gear;
a first gear engaging sleeve and a second gear engaging sleeve are arranged on the periphery of the first gear spline hub and can move left and right along the first gear spline hub;
and a third-gear and a fourth-gear engaging sleeve are arranged on the periphery of the third-gear and fourth-gear spline hub and can move left and right along the third-gear and fourth-gear spline hub.
7. The power transmission device as claimed in claim 6, wherein a power switching gear is further provided on the secondary input shaft, the power switching gear being provided on the secondary input shaft by a spline;
and a power switching shifting fork is further arranged on one side of the power switching gear, and under the action of the power switching shifting fork, the power switching gear can move left and right along the auxiliary input shaft.
8. The power transmission device as claimed in claim 7, wherein a second gear shift fork is further provided on one side of the second gear engaging sleeve, and the second gear engaging sleeve can move left and right along the second gear spline hub under the action of the second gear shift fork;
and a third-gear and a fourth-gear shifting fork are further arranged on one side of the third-gear and fourth-gear joint sleeve, and the third-gear and fourth-gear joint sleeve can move left and right along the third-gear and fourth-gear spline hub under the action of the third-gear and fourth-gear shifting fork.
9. The power transmission device of claim 8, wherein the transmission further includes a front drive assembly, a final drive assembly, and a power take-off assembly disposed within a gearbox housing;
the front drive assembly comprises a front drive shaft and a front drive shaft joint sleeve arranged on the front drive shaft, and a front drive shifting fork is further arranged at one end of the front drive shaft joint sleeve;
the main speed reducing assembly comprises a rear drive shaft arranged at one end of the front drive shaft, a rear drive shaft driven gear and a rear drive driving bevel gear which are arranged on the rear drive shaft, and a main speed reducer is further arranged at one end of the rear drive driving bevel gear, which is far away from the rear drive shaft driven gear;
the power output assembly comprises a PTO input shaft, a second intermediate shaft and a PTO shaft, wherein the second intermediate shaft and the PTO shaft are arranged in parallel with the PTO input shaft;
the PTO input shaft is sequentially provided with a high-speed gear driving gear, a high-speed and low-speed gear spline hub, a low-speed gear driving gear, a high-speed and low-speed gear engaging sleeve and a high-speed and low-speed gear shifting fork; a gear driven gear, a PTO driving gear and a slow gear driven gear are arranged on the second intermediate shaft; and a PTO shaft driven gear is arranged on the PTO shaft.
10. A tractor comprising a power transmission device, characterized in that the power transmission device is the power transmission device of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920592293.5U CN210344179U (en) | 2019-04-26 | 2019-04-26 | Tractor and power transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920592293.5U CN210344179U (en) | 2019-04-26 | 2019-04-26 | Tractor and power transmission device |
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| Publication Number | Publication Date |
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| CN210344179U true CN210344179U (en) | 2020-04-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118243A (en) * | 2019-04-26 | 2019-08-13 | 长沙桑铼特农业机械设备有限公司 | A kind of tractor and power transmission |
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2019
- 2019-04-26 CN CN201920592293.5U patent/CN210344179U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118243A (en) * | 2019-04-26 | 2019-08-13 | 长沙桑铼特农业机械设备有限公司 | A kind of tractor and power transmission |
| CN110118243B (en) * | 2019-04-26 | 2024-05-28 | 长沙桑铼特农业机械设备有限公司 | Tractor and power transmission device |
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