JPH02138536A - Transmitting device for tractor - Google Patents

Abstract

PURPOSE:To make both change-over between the normal and reverse rotations of a power output shaft and its gear shifting simple at each gear shifting for forward and reverse running by rotating a power output rotation change-over device normally and/or reversely by way of a part of a forward/reverse change-over device. CONSTITUTION:A change-over clutch 13 is provided movably to the axial direction on the front end section of a running input shaft 2, and a reverse gear 15 is also provided which is meshed with an intermediate gear 8 on an intermediate shaft 9 at all times so as to be meshed with a rotatable forward gear 14 and a reversing gear 11. The movement of the change-over clutch 13 therefore permits the running input shaft 2 to be rotated normally and/or reversely. And a change-over clutch 16 which is actuated so as to be moved, a normally rotating gear 17 which is meshed with the intermediate gear 8 and a reverse gear 18 which is meshed with the reversing gear 11 are provided on the front end section of the power output inputting shaft 4 so that the power output inputting shaft 4 is rotated normally and/or reversely by actuating the change-over clutch 16. By this constitution, a power output rotation change-over device 5 is thereby rotated normally and/or reversely by way of a part of a forward/reverse change-over device so that the device becomes simple in constitution.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a tractor transmission device.

Prior Art and Problems to be Solved by the Invention In a tilling device attached to the rear of a tractor, the direction of rotation of the tilling claws may be switched between forward rotation and reverse rotation during tilling work. The present invention attempts to simplify the configuration of this transmission device.

Means for Solving the Problems This invention provides a drive shaft (1) that is driven from the engine via a main clutch and a travel input shaft (2) that transmits power to a travel transmission that changes the speed of the travel device. , this travel input shaft (
2) is provided with a forward/reverse switching device (3) that switches between forward rotation and reverse rotation.
4) is provided with a power output rotation switching device (5) for switching transmission of the power output input shaft (4) between forward rotation and reverse rotation.

Functions and Effects of the Invention When the drive shaft (1) is transmitted from the engine through the main clutch, forward travel is achieved by switching the forward/reverse switching device (3) to the forward position, and the travel input shaft (2) is switched to the forward position. The forward rotation is transmitted, and then the vehicle is transmitted to travel via a travel transmission.

In addition, when traveling in reverse, the forward/reverse switching device (3) is switched to the reverse position, whereby the traveling input shaft (2) is transmitted in reverse rotation and transmitted through the traveling transmission.

Switching of the transmission rotation direction of the power take-off shaft is performed by a power take-off rotation switching device (5). At this time, the power output rotation switching device (5) transmits power by switching the power output input shaft (4) between forward rotation and reverse rotation through a part of the forward/reverse switching device (3). The configuration is simple because switching transmission between forward and reverse rotation of the power take-off shaft is performed using a forward/reverse switching device (3) that performs switching transmission between forward and reverse rotation of the travel input shaft (2). By switching the power extraction shaft between forward and reverse rotation and changing the speed for each forward and backward shift during travel, it is possible to select a wide range of travel speeds, work speeds, and work rotation directions suitable for the work.

Embodiment In the example shown in FIG. 1, a transmission case (6) constituting a part of the tractor body includes a drive shaft (1), a travel input shaft (2),
A forward/reverse switching device (3), a power output input shaft (4), a power output rotation switching device (5), etc. are provided. An engine, a clutch housing, etc. are provided on the front side of the transmission case (6), and a transmission case housing a variable speed transmission device for transmitting the rear wheels, a power extraction shaft, etc. is connected to the rear side.

A drive gear (7) is provided at the tip of a drive shaft (1) bearing at the front of a transmission case (6). On the rear side of this drive shaft (1).

An intermediate gear (8) that is constantly meshed and rotated with the drive gear (7).
An intermediate shaft (9) having an intermediate shaft (9), and a reversing shaft (121) having a reversing gear (11) which is constantly meshed and rotated with an intermediate gear (101) of this intermediate shaft (9), The front end of the travel input shaft (2) is visible on one side of the surface connecting the shaft (17J), and the power output input shaft (2) is visible on the other side.
4) with the front end visible.

Regarding the forward/reverse switching device (3), on the front end of the running input shaft (2), there is a switching clutch (13) that is moved in the axial direction by shifter operation, and an intermediate gear (8) on the intermediate shaft (9). ) and a forward gear (+41) that is always engaged with and freely rotatable, and a reverse gear f+9 that is always engaged and freely rotatable with the reverse gear (11) on the reverse gear +121. F) and engages with the engagement portion of the forward gear a4J to transmit forward rotation of the travel input shaft (2), and conversely, by moving the switching clutch (1) to the rear side (R) , engages with the engagement portion of the reverse gear (l!9) to transmit reverse rotation of the travel input shaft (2).

Regarding the power output rotation switching device (5), on the front end of the power output input shaft (4), there is a switching clutch flGl that is operated to move in the axial direction by shifter operation, and an intermediate gear on the intermediate shaft (9). (8) is always meshed with the forward rotation gear (1
A reverse gear (old) is provided which is always engaged with the reverse gear (11) and can rotate freely.This switching clutch gear (11)
61 to the front side (A) and engages the forward rotation gear (the interlocking part of the wheel), the power output input shaft (4) is transmitted and rotated in the forward rotation direction, and conversely, the switching clutch (IS By moving it to the rear side (B) and engaging it with the engaging part of the reverse gear (IEI), the power output input shaft (4) is transmitted and rotated in the reverse direction.

In addition, when each of the above-mentioned switching clutches (Y or (IS) is placed in the neutral position, the transmission to the traveling input shaft (2) or the power output input shaft (4) is not performed. Also, the speed of the traveling device is not changed. ,
The speed change of the power take-off shaft is carried out in the travel transmission device which transmits the power from the travel input shaft (2).
) is carried out in a power extraction transmission device that transmits power from.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, with FIG. 1 being a side sectional view of a portion thereof, and FIG. 2 being a front view thereof. In the figure, the symbol (ri) is the drive shaft, (2) is the travel input shaft, (3)
indicates a forward/reverse switching device, [4] indicates a power output input shaft, and (5) indicates a power output switching device.

Claims (1)

[Claims] This travel input shaft (2) is rotated in the forward direction between the drive shaft (1) that is driven from the engine via the main clutch and the travel input shaft (2) that transmits power to the travel transmission that changes the speed of the travel device. A forward/reverse switching device (3) is provided for switching transmission between forward and reverse rotation, and between this forward/reverse switching device (3) and a power output input shaft (4) for transmitting power to a power output transmission that changes the speed of the power output shaft. A tractor transmission device is provided with a power output rotation switching device (5) that switches the power output input shaft (4) between forward rotation and reverse rotation.