JPH0620953U - Shifting device for mobile agricultural machinery - Google Patents

Abstract

(57) [Summary] [Purpose] To safely perform shifting of the traveling section and shifting of the power extracting section with one change lever in a mobile agricultural machine having a shifting mechanism for the traveling section and the power extracting section in the same mission case. To be able to do so. [Structure] A shift gear shift shaft 2 for traveling and a shift shifter shaft 3 for PTO shifting are projected to the outside of the mission case 1, and the shift lever shaft 2 is moved by the left and right movement of a change lever 8 to shift the travel shift up and down. The shifter shaft 3 is moved to perform PTO gear shifting, and a restricting member is provided to prevent reverse gear shifting when the PTO gear shifting is other than neutral.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a shift operating device having a structure in which a gear shifting mechanism for a traveling unit and a power take-out (PTO) unit is provided in the same mission case in a mobile agricultural machine.

[0002]

[Prior art]

 Conventionally, a technique has been publicly known in which gear shifting between a traveling portion and a power take-out portion can be performed with a single change lever.

[0003]

[Problems to be solved by the device]

 However, in the conventional technology, for example, when a working machine such as a rotary is driven from the power take-off shaft of the management machine, the power take-off shaft can be shifted even in the reverse position, so that the rotary is driven even during the reverse drive. It was very dangerous. Therefore, in order to work safely, it is impossible to change the speed of the rotary part when the traveling part is in the reverse position, and conversely, if the rotary part is not neutral, the reverse speed change of the traveling part cannot be performed. The structure was desired.

[0004]

[Means for Solving the Problems]

 The problems to be solved by the present invention are as described above, and the means for solving the problems will be described below. That is, in a mobile agricultural machine having a transmission mechanism for a traveling portion and a power take-out portion in the same mission case, the shifter shafts for traveling traveling and PTO shifting are projected in parallel with each other in the same direction from the mission case, and A shift mechanism that shifts the shift shaft of the PTO shift gear by rotating the change lever in the left-right direction and the vertical direction is arranged outside the mission case. Is configured so that it cannot move to the reverse position.

[0005]

[Operation] The operation of the present invention will be described. The shifter shaft 2 is moved by the left and right rotations of the change lever 8 via the speed change plate 9 and the pin 10, and the shifter shaft 3 is moved vertically by the change lever 8 so that the shifter shaft 3 moves vertically. If the PTO shift is neutral, the shift lever 8 is rotated to make the traveling shift in the reverse direction, and the shifter shaft 2 is inserted into the restriction hole 4d to allow the reverse shift. If the PTO gear shift is other than neutral, the shifter shaft 2 comes into contact with the side surface of the change plate 4 and cannot perform reverse gear shift.

[0006]

【Example】

 The problems to be solved and the means for solving the present invention are as described above. Next, a specific configuration of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a plan view of a shift operating device of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a rear view of a change plate of the shift operating device.

1 to 3, the configuration of the present invention will be described for the case where the mobile agricultural machine is a management machine. The transmission case 1 accommodates a gear-sliding traveling speed change mechanism and a PTO speed change mechanism, and a travel speed shifter shaft 2 and a PTO speed shifter shaft 3 for sliding the speed change sliding gears. Are parallel to the upper part of the mission case 1, one end of the shifter shafts 2 and 3 is projected outward from the mission case 1, and a pivot shaft 5 is provided in front of the shifter shafts 2 and 3 in parallel with the shifter shafts 2 and 3. The front end of the change plate 4 is pivotally supported on the end of the pivot shaft 5 so as to project. The change plate 4 is L-shaped in plan view, and the vertical surface 4a on the rear side is U-shaped in side view, and horizontal planes 4c, 4c are formed vertically. As shown in FIG. 3, an elongated hole 4b is formed in the center of the vertical surface 4a in an oblique direction, and a pin 7 projecting rearward from the shifter shaft 3 penetrates through the elongated hole 4b to change it. The vertical shift of the plate 4 causes the shifter shaft 3 to slide left and right, enabling the PTO shift.

Further, the lower part of the change lever 8 is inserted and pivotally supported on the horizontal planes 4c and 4c, and the transmission plate 9 fixedly mounted on the change lever 8 is arranged on the upper horizontal plane 4c so as to be forwardly moved. A long hole 9a is extended in the front part of the transmission plate in the front-rear direction, and a pin 10 standing upright from the shifter shaft 2 is passed through the long hole 9a to rotate the change lever 8 left and right. When moved, the shifter shaft 2 slides to the left and right to allow traveling gear shifting. Even if the change lever 8 is turned up and down to perform the PTO gear shift, it does not change due to the elongated hole 9a, and the traveling gear shift is not performed.

A restriction hole 4d, which is slightly larger than the diameter of the shifter shaft 2, is opened on the side surface of the change plate 4, and the restriction hole 4d is at a position where the PTO gear shift is in the neutral position (the vertical rotation is at the center). The shifter shaft 2 is configured to coincide with the shifter shaft 2 in a side view, and when the change lever 8 is in the PTO gear shift neutral position and rotates to the reverse (R) side, the shifter shaft 2 is inserted into the restriction hole 4d so that the reverse shift can be performed. If the PTO gear shift is not neutral and the drive gear shifts to the reverse side, the end of the shifter shaft 2 abuts the change plate 4 to prevent the reverse gear shift.

[0010]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. That is, since the PTO gear cannot be shifted to the reverse position except when the gear is in the neutral position, the work machine is not driven during the reverse movement and the vehicle can be safely moved in the reverse direction, thus making it possible to construct a single shift operation device.

[Brief description of drawings]

FIG. 1 is a plan view of a shift operating device according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a rear view of a change plate of the shift operating device.

[Explanation of symbols]

 1 mission case 2 shifter shaft for traveling speed change 3 shifter shaft for PTO speed change 4 change plate 4d restriction hole 8 change lever 9 speed change plate

Claims (1)

[Scope of utility model registration request] 1. A mobile agricultural machine having a transmission mechanism for a traveling portion and a power take-out portion in the same transmission case, wherein shifter shafts for traveling traveling and PTO shifting project from the transmission case in parallel with each other in the same direction. A shift mechanism for shifting the shifter shaft and the shifter shaft for PTO shifting by shifting the change lever in the left-right direction and the up-down direction is arranged outside the transmission case, and the shifter for traveling shifting is provided at a position other than the neutral position of the PTO shift. A shift operating device for a mobile agricultural machine, wherein the shaft is configured to be immovable to a reverse position.