CN216306668U - Power output gear shifting mechanism of stepless speed change tractor gearbox - Google Patents
Power output gear shifting mechanism of stepless speed change tractor gearbox Download PDFInfo
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- CN216306668U CN216306668U CN202122895785.1U CN202122895785U CN216306668U CN 216306668 U CN216306668 U CN 216306668U CN 202122895785 U CN202122895785 U CN 202122895785U CN 216306668 U CN216306668 U CN 216306668U
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Abstract
The utility model relates to a power output gear shifting mechanism of a stepless speed change tractor gearbox, which consists of a duplex intermediate gear (1), a first transmission gear (6) and a second transmission gear (2) which are sleeved on a power output shaft (4) in an empty way, wherein a sliding sleeve (8) is in meshing transmission with an external spline structure (11) on the first transmission gear (6) or the second transmission gear (2), so that the power output shaft (4) has two-gear output rotating speed; the rear ends of the duplex carrier gear (1) and the power output shaft (4) are supported on the rear end cover (3), and the right gear of the duplex carrier gear (1) and the transmission gear II (2) are arranged in the gear opening hole (10). The clutch has the advantages that firstly, the transmission gear and the external spline structure (11) on the end surface of the transmission gear are integrally designed, so that the axial clutch structure is simple; secondly, the transmission gear is arranged in a gear opening hole (10) of the wall body of the gearbox, so that the axial size is reduced; thirdly, the box and the split type design of rear end cover, it is convenient to overhaul, labour saving and time saving.
Description
Technical Field
The utility model relates to a speed change mechanism in a gearbox of an agricultural tractor in agricultural machinery, in particular to a power output gear shift mechanism of a gearbox of a stepless speed change tractor.
Background
At present, in the existing gearbox power output speed change mechanism, the scheme is almost the same, and as the specification of Chinese invention patent CN201320880992.2, a transmission structure of the power output shaft of the gearbox of the wheeled tractor is disclosed. The power input shaft is provided with a driving gear I and a driving gear II, the driven shaft is sleeved with a driven gear I and a driven gear II, the driving gear I is meshed with the driven gear I, the driving gear II is meshed with the driven gear II, a fixed tooth holder is fixed on the driven shaft and is positioned between the driven gear I and the driven gear II, gears matched with the fixed tooth holders are arranged on the inner sides of the driven gear I and the driven gear II, a meshing sleeve is sleeved on the gear arranged on the inner side of the driven gear I, the gear arranged on the inner side of the driven gear II and the fixed tooth holder, and shifting fork grooves are formed in the periphery of the meshing sleeve; the gear to be butted is selected by moving the meshing sleeve, so that 2 rotating speeds and stopping of the power output shaft are realized.
The transmission structure of the power output shaft of the gearbox of the wheeled tractor in the patent can realize speed change, but has the following defects: when the gear is worn or damaged, the whole gearbox needs to be disassembled and replaced when the gear is replaced, and the maintenance cost and time are greatly improved.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a power output gear shifting mechanism of a stepless speed change tractor gearbox aiming at the defects in the prior art.
The technical scheme of the utility model is that the power transmission device comprises a duplex intermediate gear 1 and a power output shaft 4, wherein the power output shaft 4 is provided with a first transmission gear 6 and a second transmission gear 2, the duplex intermediate gear 1 is a combined gear with a shaft head and is directly supported on a box body 5 by the shaft head, and a sliding sleeve 8 and a sliding sleeve seat 7 which can be selectively in spline connection with one of the first transmission gear 6 and the second transmission gear 2 are arranged between the first transmission gear 6 and the second transmission gear 2, and the power transmission device is characterized in that: the transmission gear I6 and the transmission gear II 2 are respectively provided with an external spline structure 11 which can be meshed with a spline in the sliding sleeve 8, and the sliding sleeve 8 slides axially to select to be meshed with the transmission gear I6 for transmission or meshed with the transmission gear II 2 for transmission, so that a sliding sleeve type two-gear speed change structure is formed, and the power output shaft 4 has two-gear output rotating speed; the tail end of the box body 5 is of a split structure, and the rear end cover 3 replaces a rear wall body at the tail end of the box body 5.
The transmission gear I6 and the transmission gear II 2 are respectively in an integral structure with the body.
The tail ends of the duplex carrier gear 1 and the power output shaft 4 are supported on the rear end cover 3.
A wall body at the joint of the tail end of the box body 5 and the rear end cover 3 is provided with a gear opening hole 10, and a gear on the right side of the duplex carrier gear 1 and the transmission gear II 2 are arranged in the gear opening hole 10.
Compared with the prior art, the clutch has the advantages that firstly, the transmission gear and the end face external spline structure 11 are integrally designed, so that the axial clutch structure is simple; secondly, the normally meshed gear is arranged in the opening hole 10 at the tail end of the wall body of the gearbox, so that the axial size of the gearbox is reduced; thirdly, the tail end of the gearbox can be detached, so that the whole gearbox does not need to be detached when internal parts are replaced and maintained conveniently, and the maintenance cost and time are reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram of the transmission gear two 2 and the male spline 11 in fig. 1.
Reference numbers in the figures: 1-duplex carrier gear, 2-transmission gear II, 3-rear end cover, 4-power output shaft, 5-box, 6-transmission gear I, 7-sliding sleeve seat, 8-sliding sleeve, 9-shifting fork, 10-shift hole and 11-external spline structure.
Detailed Description
Embodiments of the utility model are described in further detail below with reference to the following figures:
the utility model is provided with a duplex intermediate gear 1 and a power output shaft 4, wherein the power output shaft 4 is provided with a first transmission gear 6 and a second transmission gear 2, the duplex intermediate gear 1 is a combined gear with a shaft head, the shaft head is directly supported on a box body 5, and a sliding sleeve 8 and a sliding sleeve seat 7 which can be selectively in spline connection with one of the first transmission gear 6 and the second transmission gear 2 are arranged between the first transmission gear 6 and the second transmission gear 2. The first transmission gear 6 and the second transmission gear 2 are respectively provided with an external spline structure 11 which can be meshed with an internal spline of the sliding sleeve 8, and the sliding sleeve 8 slides axially to select to be meshed with the external spline structure on the first transmission gear 6 for transmission or meshed with the external spline structure of the second transmission gear 2 for transmission, so that a sliding sleeve type two-gear speed change structure is formed, and the power output shaft 4 has two-gear output rotating speed; the tail end of the box body 5 is of a split structure, and the rear end cover 3 replaces a rear wall body at the tail end of the box body 5.
The external spline structures 11 on the first transmission gear 6 and the second transmission gear 2 are respectively an integral piece with the gear body.
The tail ends of the duplex carrier gear 1 and the power output shaft 4 are supported on the rear end cover 3. A wall body at the joint of the tail end of the box body 5 and the rear end cover 3 is provided with a gear opening hole 10, and a gear on the right side of the duplex carrier gear 1 and the transmission gear II 2 are arranged in the gear opening hole 10, so that the axial size of the power output shaft 4 can be reduced, and the structure of the box body 5 is more compact.
The sliding sleeve 8 is shifted by a shifting fork 9 to move axially. When the left side of the sliding sleeve 8 is connected with the external spline structure 11 of the first transmission gear 6, the left gear of the duplex intermediate gear 1 drives the first transmission gear 6 to rotate, the first transmission gear 6 drives the sliding sleeve 8 and the sliding sleeve seat 7 meshed with the sliding sleeve 8 to rotate, and finally the internal spline of the sliding sleeve seat 7 drives the power output shaft 4 to rotate; when the sliding sleeve 8 is arranged in the middle, the first transmission gear 6 and the second transmission gear 2 are idle at the power output shaft 4, and the power output shaft 4 stops rotating at the moment; when the right side of the sliding sleeve 8 is placed and connected with the external spline structure 11 of the second transmission gear 2, the right gear of the duplex intermediate gear 1 drives the second transmission gear 2 to rotate, the second transmission gear 2 drives the sliding sleeve 8 and the sliding sleeve seat 7 meshed with the sliding sleeve 8 to rotate, and finally the internal spline of the sliding sleeve seat 7 drives the power output shaft 4 to rotate.
The tail ends of the duplex carrier gear 1 and the power output shaft 4 are supported on the rear end cover 3 through bearings, when parts need to be replaced, only the rear end cover 3 needs to be detached, the whole gearbox does not need to be detached to replace the parts, and therefore the maintenance is convenient, and time and labor are saved.
Claims (4)
1. The utility model provides a power take off gearshift of infinitely variable speed tractor gearbox, including duplex gap bridge gear (1) and power take off shaft (4), be equipped with drive gear (6) and drive gear two (2) on power take off shaft (4), duplex gap bridge gear (1) is the joint gear who takes the spindle nose, directly support on box (5) by the spindle nose, be equipped with between drive gear (6) and drive gear two (2) and optionally carry out slip cover (8) and slip cover seat (7) that splined connection was carried out with one of them, its characterized in that: the transmission gear I (6) and the transmission gear II (2) are respectively provided with an external spline structure (11) which can be meshed with an internal spline of the sliding sleeve (8), and the sliding sleeve (8) slides axially to select to be meshed with the transmission gear I (6) for transmission or meshed with the transmission gear II (2) for transmission, so that a sliding sleeve type two-gear speed change structure is formed, and the power output shaft (4) has two-gear output rotating speed; the tail end of the box body (5) is of a split structure, and the rear end cover (3) replaces a rear wall body at the tail end of the box body (5).
2. The power take-off shifting mechanism of a continuously variable transmission of a tractor as claimed in claim 1, wherein: the external spline structures (11) on the first transmission gear (6) and the second transmission gear (2) are respectively integrated with the body of the transmission gear.
3. The power take-off shifting mechanism of a continuously variable transmission tractor as claimed in claim 2, wherein: the tail ends of the duplex carrier gear (1) and the power output shaft (4) are supported on the rear end cover (3).
4. The power take-off shifting mechanism of a continuously variable transmission tractor as claimed in claim 2, wherein: a wall body at the joint of the tail end of the box body (5) and the rear end cover (3) is provided with a blocking hole (10), and a gear on the right side of the duplex carrier gear (1) and the second transmission gear (2) are arranged in the blocking hole (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122895785.1U CN216306668U (en) | 2021-11-24 | 2021-11-24 | Power output gear shifting mechanism of stepless speed change tractor gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122895785.1U CN216306668U (en) | 2021-11-24 | 2021-11-24 | Power output gear shifting mechanism of stepless speed change tractor gearbox |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216306668U true CN216306668U (en) | 2022-04-15 |
Family
ID=81123372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122895785.1U Active CN216306668U (en) | 2021-11-24 | 2021-11-24 | Power output gear shifting mechanism of stepless speed change tractor gearbox |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216306668U (en) |
-
2021
- 2021-11-24 CN CN202122895785.1U patent/CN216306668U/en active Active
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