JPH0513627Y2 - - 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,
Depending on the work conditions and type of work, some work is performed by turning the handlebar in the front and rear directions of the vehicle body. Furthermore, in such a mobile agricultural machine, the gear lever as well as the handlebar are turned in the longitudinal direction of the vehicle body. On the other hand, a plate-shaped change guide having a guide groove is attached to a 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, as the handlebar and the gear shift lever are turned in the longitudinal direction of the vehicle body, the operator also changes his position in the longitudinal direction of the vehicle body and operates the handlebar and the like. For this reason, when the handlebar is turned to the front of the vehicle body and when it is turned to the rear of the vehicle body, the moving direction of the mobile agricultural machine when operating the gear shift lever to the same position is forward, backward, and reverse from the perspective of the operator. becomes.

Therefore, from the perspective of preventing erroneous operation of the gear shift lever, we designed a first shift position indicator mark that indicates the gear shift position of the gear shift lever when the handlebar is turned toward the rear of the vehicle in the normal state, and A second shift position indicating mark indicating the shift position of the shift lever when turned forward is provided in the change guide at a position close to the guide groove. Furthermore, a high-speed reversing restriction mechanism is provided to restrict high-speed backward movement of the mobile agricultural machine when the handlebar is turned toward the front of the vehicle body.

Problems to be Solved by the Invention The first shift position indicator mark and the second shift position indicator mark are arranged close to each other, and
It is laid out flat. Therefore, when the handlebar is turned in either direction of the front or rear direction of the vehicle body, these two sets of gear shift position indication marks are visible to the worker, making it difficult for inexperienced workers or sudden shifts to occur. There is a risk of misreading the position indicator mark and operating the gear shift lever incorrectly, resulting in a serious accident.

In addition, the high-speed reversing restriction mechanism has a complicated structure and requires time and effort to operate.

Means for Solving the Problem In a mobile agricultural machine in which the handle rod and the gear shift lever can be turned in the longitudinal direction of the vehicle body, a guide groove is formed to guide a guide pin that moves as the gear shift lever is operated to change gears. Provide a change guide. A display board is provided adjacent to the guide groove so as to be freely reversible, and a shift position indication mark is provided on the front side of the display board to indicate the shift position of the gear shift lever when the handlebar is turned toward the rear of the vehicle body. A gear shift position indicating mark is provided on the back side of the gear shift lever to indicate the gear shift position of the gear shift lever when the handlebar is turned toward the front of the vehicle body. A display board is provided with a restriction part that restricts a speed change operation of a speed change lever to a high speed back position by coming into contact with a guide pin when the handlebar is turned toward the front of the vehicle body.

Operation When turning the steering wheel rod and gear shift lever toward the rear of the vehicle, keep the front side of the display board facing up, and while looking at the gear shift position indication mark and guide pin provided on the display side of the display board, Operate the gear shift lever. If the steering wheel rod and gear shift lever are turned toward the front of the vehicle, turn the display board over so that the back side is facing up, and while looking at the gear shift position indicator mark and guide pin provided on the back side of the display board, Operate the gear shift lever. In addition, if the display board is turned over so that the back side of the display board is facing up, the regulating part of the display board will come into contact with the guide pin when you try to shift the gear lever to the high-speed back position, causing the high-speed back Shifting operations to this position are restricted.

Embodiment An embodiment of the present invention will be described based on the drawings.
First, a handle rod 3 is attached to the upper part of a transmission case 2 of a mobile agricultural machine 1 having a two-wheeled body.
The handle rod 3 is provided so as to be turnable in the longitudinal direction of the vehicle body of the mobile agricultural machine 1. Further, a speed change lever 4 is attached to the mobile agricultural machine 1 in parallel with the handle rod 3, and this speed change lever 4 is also provided so as to be freely turnable in the longitudinal direction of the vehicle body of the mobile agricultural machine 1. The transmission case 2 includes a plurality of shift gears (not shown) whose meshing states change as the shift lever 4 is operated, and shafts 5 and 6 to which these shift gears are fitted and fixed. A transmission mechanism is housed therein, and joints 7 and 8 are fixed to the tips of the shafts 5 and 6 that protrude outside of the transmission case 2.

Next, the speed change lever 4 includes a first support cylinder part 10 that is rotatable in the front and rear directions around the axis of the support shaft 9;
A second support cylinder part 11 is fitted into the support cylinder part 10 so as to be rotatable around the axis;
It consists of an operating part 12 which is slidable in the vertical direction and rotatably engaged integrally with the support cylinder part 11,
An arm 13 and a guide pin 14 are fixed to the second support cylinder part 11. And the arm 1
The tip portions of the guide pins 14 are selectively engaged with the grooves of the joints 7 and 8, and the tip portions of the guide pins 14 are located in guide grooves to be described later.

A plate-shaped change guide 15 is fixed to the transmission case 2 at a position covering above the joints 7 and 8 and the arm 13, and an H-shaped guide groove 16 is formed in the change guide 15. . Here, at a position close to the guide groove 16 on the upper surface of the change guide 15, there is provided a low speed shift of the speed change lever 4 when the handlebar rod 3 is turned toward the rear of the vehicle in normal use. A shift position indication mark (1, R ₁ ) indicating the position is printed. Furthermore, the guide groove 1 in the upper surface portion of the chain guide 15
A display plate 17 is attached to a position close to 6 by pins 18 so as to be freely reversible in the front-back direction. As shown in FIG. 2, the front surface of the display board 17 indicates the high-speed shifting position of the gear shift lever 4 when the handlebar rod 3 is turned toward the rear of the vehicle in normal use. Shift position indication marks (2, 3) are printed. Further, on the back side of the display plate 17, as shown in FIG. 4, there is a shift position indication mark ( 1, R ₁ ) and the words ``High-speed back-up restricted'' are printed on it. Further, the free end side of the display board 17 is a regulating part 19,
When the display plate 17 is reversed forward as shown in FIGS. 3 and 4, the restricting portion 19 covers a part of the guide groove 16, and the shift lever 4 is shifted to the high speed back position. This restricts the movement of the guide pin 14 when doing so.

In such a configuration, in a normal state in which the handle rod 3 and the gear shift lever 4 are turned toward the rear of the vehicle body of the mobile agricultural machine 1, the display board 17 is turned backward as shown in FIGS. 1 and 2. I'll let it happen. Then, the operator can see the shift position indication mark (1, R ₁ ) printed on the change guide 15 and the shift position indication mark (2, 3) printed on the front side of the display board 17, and When the rod 3 is turned to the front of the vehicle body, the gear shift position indication mark used is no longer visible. Therefore, erroneous operation of the shift lever 4 due to misreading the shift position indication mark is prevented.

Next, when the handlebar 3 and the speed change lever 4 are turned toward the front of the vehicle body of the mobile agricultural machine 1, the display board 17 is reversed forward as shown in FIGS. 3 and 4. Then, the regulation part 19 of the display board 17 covers the part of the guide groove 16 at the high speed side shift position, and the shift position indication mark (1, R ₁ ) printed on the back side of the display board 17 and the "high speed back regulation in progress" are displayed. ” becomes visible to the worker. Therefore, the operator performs the gear shifting operation while looking at the shift position indication mark (1, R ₁ ) on the back side of the display board 17, thereby preventing malfunction of the shift lever 4 due to misreading of the shift position indication mark. At this time, the shift position indication mark (1, R ₁ ) printed on the change guide 15, which is used when the handlebar 3 etc. is turned to the rear of the vehicle body, will also be visible to the operator; Back is regulated.”
They can be clearly distinguished depending on whether or not the characters are placed side by side, and will not cause incorrect operation.

Further, when the handle rod 3 and the gear shift lever 4 are turned toward the front of the vehicle body of the mobile agricultural machine 1, the regulating portion 19 of the display plate 17 that is reversed forward moves the portion of the guide groove 16 at the high-speed gear shift position. Therefore, even if an attempt is made to shift the shift lever 4 to the high speed back position, the guide pin 14 comes into contact with the restriction portion 19, and the shift operation to the high speed back position is restricted. Therefore, high-speed backlash of the mobile agricultural machine 1 due to erroneous operation of the speed change lever 4 is reliably prevented, and work safety is greatly improved. Moreover, the display board 17
With an extremely simple structure and operation of reversing the gear toward the front of the vehicle body, shifting operations to the high-speed reverse position can be restricted.

In addition, to explain the turning operation of the shift lever 4 in the front-rear direction, only the operating part 12 is pulled upward by a predetermined distance, and the operating part 12 and the second support cylinder part 1 are removed.
After releasing the engagement state with 1, press only the operation part 12.
The device is turned 180°, and after the turn is completed, the operating portion 12 and the second support cylinder portion 11 are engaged again.

Effects of the invention As described above, the present invention provides a display board close to the guide groove that is reversed when the handle rod or gear shift lever is turned in the front-rear direction of the vehicle body of the mobile agricultural machine, and the front side of the display board is A gear shift indication mark is provided on the back side of the display board to indicate the gear shift position of the gear shift lever when the handlebar is turned backward, and a gearshift indicator is provided on the back side of the display board to indicate the gearshift position of the gearshift bar when the handlebar is turned forward. By providing an instruction mark, only the necessary shift instruction mark is visible even when the handlebar is turned in either direction, forward or backward, and this prevents erroneous operation of the shift lever due to misreading the shift instruction mark. Furthermore, when the handlebar is turned forward, the guide pin comes into contact with the regulating portion of the display board, thereby regulating the shift operation of the shift lever to the high-speed back position. This has the effect of preventing accidents caused by moving agricultural machinery backing up 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 transmission case section with the handlebar rod and gear shift lever turned toward the rear of the vehicle; FIG. 2 is a plan view thereof; FIG. 3 is a side view showing the transmission case portion in a state where the handle rod and the speed change lever are turned toward the front of the vehicle body, FIG. 4 is a plan view thereof, and FIG. 5 is a side view showing the entire mobile agricultural machine. 1... Mobile agricultural machine, 3... Handle rod, 4... Speed lever, 14... Guide pin, 15... Change guide, 16... Guide groove, 17... Display board,
19...Regulatory Department.

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 longitudinal direction of the vehicle body, 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 lever, and the guide A display board is provided adjacent to the groove so as to be freely reversible, and a shift position indicating mark is provided on the front side of the display board to indicate the shift position of the shift lever when the handlebar rod is turned toward the rear of the vehicle body. A shift position indication mark is provided on the back side of the display board to indicate the shift position of the shift lever when the handlebar is turned toward the front of the vehicle; A speed change operation device for a mobile agricultural machine, characterized in that the display board is provided with a regulating portion that restricts the speed change operation of the speed change lever to a high speed back position by coming into contact with a pin.