JPH0513624Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a speed change operation device for a mobile agricultural machine that performs work by turning the handle rod in the front and rear directions depending on the work conditions, type of work, etc.

Conventional technology Conventionally, in two-wheeled walking-type mobile agricultural machines,
Some machines perform work by turning the handle rod back and forth depending on the work conditions and type of work. Furthermore, in such a mobile agricultural machine, the speed change lever is also turned in the front and back direction as the handlebar is turned. On the other hand, a plate-shaped change guide having a guide groove is attached to the mobile agricultural machine, and a guide pin that moves in response to a speed change operation of a speed change lever is located in the guide groove.

Here, in conjunction with turning the handle rod and the speed change lever in the front-rear direction, the operator also changes his position in the front-rear direction of the mobile agricultural machine and operates the handle rod, etc. For this reason, the normal state in which the handle rod is turned to the rear of the mobile agricultural machine and the case in which the handle rod is turned to the front of the mobile agricultural machine are different when the speed change lever is operated to the same position. The direction of movement is forward and backward as seen from the worker.

Therefore, from the perspective of preventing erroneous operation of the gear shift lever, we moved the first shift position indication mark that indicates the gear shift position of the gear shift lever in the normal state when the handle bar is turned to the rear of the moving agricultural machine, and moved the handle bar. A second shift position indicating mark indicating the shift position of the shift lever when the agricultural machine is turned forward is provided at a position close to the guide groove in the change guide. Further, a high-speed reversing regulation mechanism is provided to restrict high-speed reversing of the mobile agricultural machine when the handle rod is turned forward of the mobile agricultural machine.

Problem to be Solved by the Invention The first shift position indication mark and the second shift position indication mark are arranged close to each other, and
It is laid out flat. Therefore, when the handlebar is turned to the rear or the front of the mobile agricultural machine, both of these two sets of shift position indication marks are visible to the operator, making it difficult for inexperienced operators or sudden operators to do so. If you misread the shift position indicator mark and operate the shift lever incorrectly, there is a risk of a serious accident.

Furthermore, the generally employed high-speed reversing restriction mechanism has a complicated structure and requires time and effort to operate.

Means for Solving the Problems In a mobile agricultural machine in which a handle rod and a speed change lever can be turned in the front and back direction, a change gear is provided in which a guide groove is formed to guide a guide pin that moves with the speed change operation of the speed change operation lever. a guide is provided, and a first shift position indicating mark for indicating the shift position of the shift lever when the handlebar rod is turned backward is provided on the change guide in proximity to the guide groove; A rotatable display board is provided on the change guide at a position that covers the upper part of the shift position indicator mark and a position that opens the upper part of the first shift position indicator mark. a second shift position instruction for instructing the shift position of the shift lever when the handle rod is turned forward on one side of the display panel facing upward when the display panel is rotated to a position covering the display panel; A mark is provided, and when the display board is rotated to a position covering above the first shift instruction mark, it comes into contact with the guide pin, thereby restricting the shift operation of the shift lever to the high-speed reverse position. A regulating portion was provided on the display board.

Operation When the handle rod and the gear shift lever are turned to the rear of the mobile agricultural machine, the display plate should be rotated to a position where the upper part of the first gear shift position indicator mark is opened. In this state, the first shift position indicating mark is visible to the worker, the second shift position indicating mark provided on the display board is facing downward and is no longer visible to the worker, and the worker cannot see the first shift position. Perform gear shifting operations while watching the gear shift position indicator mark.

When the handle rod and the gear shift lever are turned to the front of the mobile agricultural machine, the display plate is rotated to a position covering the first gear shift position indication mark. In this state, the first gear shift indication mark is covered by the display board and becomes invisible, and the second gear shift position indication mark provided on the display mark faces upward and becomes visible to the operator. Perform the gear shifting operation while looking at the second gear shift position indication mark.
Furthermore, in this state, when an attempt is made to shift the speed change lever to the high speed reverse position, the guide pin comes into contact with the restriction portion, and the speed change operation to the high speed reverse position is restricted.

Embodiment An embodiment of the present invention will be described based on the drawings.
A handle rod 3 and a speed change lever 4 are provided on the upper part of the transmission case 2 of the mobile agricultural machine 1 having a two-wheeled vehicle body. It is set up freely. Further, an arm 5 that rotates integrally with the change lever 4 is connected to the change lever 4, and the tip of the arm 5 is connected to one end of a connecting rod 6 that is slidable along the axial direction. It is engaged with the formed engagement groove 7. Note that a shift gear (not shown) housed in the transmission case 2 is connected to the other end of the arm 5.

Next, a change guide 8 that covers the upper part of the arm 5 and the connecting rod 6 is fixed to the side surface of the mission case 2. A long guide groove 9 is formed in the change guide 8 along the sliding direction of the connecting rod 6, and a guide pin 10 fixed to the arm 5 and extending upward is inserted into the guide groove 9. There is. A first shift position indicating mark 11 is pasted on the upper surface of the change guide 8 adjacent to the guide groove 9. The display content of this shift position indication mark 11 is "2-1-R"
, and is arranged so as to be read from the rear side of the mobile agricultural machine 1.

Further, on the upper surface of the change guide 8, a display plate 12 located on the opposite side of the guide groove 9 with the first shift position indication mark 11 in between is attached so as to be rotatable around the axis of the fulcrum pin 13. It is being This display board 12 is rotatably provided in a rear rotation position covering the upper part of the first shift position indication mark 11 and a forward rotation position opening the upper part of the first shift position indication mark 11. The display board 1 faces upward when rotated to the rear rotation position.
A second shift position indicating mark 14 is pasted on one side of 2. The display content of this shift position indication mark 14 is "1-R", and it is arranged to be read from the front side of the mobile agricultural machine 1. Further, a regulating portion 15 is integrally formed on the display plate 12, and covers a part of the guide groove 9 when the display plate 12 is rotated to the rear rotation position.

In such a configuration, when the handle rod 3 and the gear shift lever 4 are turned to the rear of the mobile agricultural machine 1, the display board 12 is rotated to the forward rotation position as shown in FIGS. 1 to 3. Then, the second shift position indicating mark 14 is turned downward so that it is not visible, and the first shift position indicating mark 11 is visible to the operator. Then, the operator selects the first shift position indication mark 11 and the guide pin 1 that moves within the guide groove 9 in accordance with the shift operation of the shift lever 4.
Perform gear shifting operations while looking at 0.

Next, when the handle rod 3 and the gear shift lever 4 are turned forward of the mobile agricultural machine 1, the display plate 12 is rotated to the rear rotation position as shown in FIG. The upper part of the first shift position indicating mark 11 is covered to make it invisible, and the second shift position indicating mark 14 is directed upward so that it can be seen by the operator. Then, the operator performs the gear change operation while looking at the second shift position indication mark 14 and the guide pin 10 that moves within the guide groove 9 as the gear change operation of the gear change lever 4 is performed. In addition, display board 1
2 is rotated to the rear rotation position, the restriction part 15 covers a part of the guide groove 9, and when the gear shift lever 4 is attempted to be shifted to the high speed reverse gear position, the guide pin 10 is rotated to the rear rotation position. 15, and the speed change operation to the high speed reverse position is restricted.

Effects of the invention This invention provides that when the handle rod and gear shift lever are turned to the rear of the mobile agricultural machine as described above,
By rotating the display board to a position where the upper part of the first gear shift position indicator mark is opened and the second gear shift position indicator mark provided on the display board facing downward and out of sight from the worker, the operator can You can perform gear shifting operations while looking at the first gear shift position indication mark and the guide pin that moves with the gear shifting operation.Also, when the handle rod and gear shift lever are turned to the front of the mobile agricultural machine, the display screen is rotated to a position that covers above the first shift position indicator mark so that the first shift position indicator mark becomes invisible and the second shift position indicator mark provided on the display board is oriented upward so that it is visible to the operator. By doing this, the operator can perform the gear shift operation while looking at the second gear shift position indication mark and the guide pin that moves with the gear shift operation, and therefore, the operator can perform the gear shift operation while looking at the second shift position indication mark and the guide pin that moves with the gear shift operation. Only the first or second shift position indicator marks can be seen by the operator, which prevents erroneous operation of the gear shift lever due to misreading of the shift position indicator marks. In this case, the guide pin that moves with the gear shifting operation comes into contact with a regulating portion provided on the display board, thereby regulating the gear shifting operation to the high-speed reverse position.
This has the effect of preventing accidents caused by the mobile agricultural machine moving backward at high speed and increasing work safety.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a side view showing the entire mobile agricultural machine, Fig. 2 is a vertical side view showing an enlarged view of its main parts, and Fig. 3 is an enlarged view of its main parts. FIG. 4 is an enlarged plan view showing the main parts with the handle rod and the gear shift lever turned forward. DESCRIPTION OF SYMBOLS 1... Mobile agricultural machine, 3... Handle stick, 4... Gear shift lever, 8... Change guide, 9... Guide groove, 10... Guide pin, 11... First gear shift position indication mark, 12... Display board, 14...Second gear shift position indication mark, 15...Restriction section.

Claims (1)

[Scope of utility model registration request] In a mobile agricultural machine in which a handle rod and a speed change lever can be turned in the front-rear direction, a change guide is provided in which a guide groove is formed to guide a guide pin that moves with the speed change operation of the speed change operation lever, A first shift position indicating mark for indicating the shift position of the shift lever when the gear shift lever is turned backward is provided on the change guide in close proximity to the guide groove, and above the first shift position indicating mark. A rotatable display board is provided on the change guide at a position that covers the first shift position indicator mark and a position that opens above the first shift position indicator mark, and the display board is located at a position that covers above the first shift position indicator mark. A second shift position indicating mark is provided on one surface of the display plate that faces upward when the handlebar is turned forward, and a second shift position indicating mark is provided to indicate the shift position of the shift lever when the handlebar is turned forward; A restriction portion is provided on the display board, which restricts the shift operation of the shift lever to the high-speed reverse position by coming into contact with the guide pin when the display board is rotated to a position covering the upper part of the first shift instruction mark. A speed change operation device for a mobile agricultural machine, characterized in that: