JPS586732Y2 - Walking type mobile agricultural machine - Google Patents

Description

[Detailed description of the invention] This invention is equipped with a control handle that can change the direction forward and backward with respect to the aircraft, and the forward and reverse shift shafts supported parallel to each other can be selectively moved in the axial direction. The present invention relates to a walking type mobile agricultural machine which is configured to be operated to change speed between high and low speeds in a forward state and high and low speeds in a reverse state.

In general, when walking-type mobile agricultural machines are brought into high-speed backward motion, workers who are normally located at the rear of the machine in the direction of movement are likely to fall over, which could lead to a dangerous situation where the machine could land on top of them. Because of this, it is necessary to check and prevent high-speed reversing.

As mentioned above, if the steering wheel is equipped so that it can be turned forward or backward, the operator's position relative to the aircraft will change as the steering wheel is turned forward or backward. It is necessary to switch accordingly.

For this reason, in the walking-type mobile agricultural machine described above, a restraining device is connected to the machine body to selectively engage one of the shift shafts and prevent the engaged shift shaft from shifting to the high speed side. This has been done in the past, but the present invention aims to ensure the necessary high-speed backward movement restraint by rationally improving the mounting structure of the restraint device.

Embodiments of the present invention will be described in detail below with reference to illustrative drawings.

The figure shows that a control handle 3 extending from the top of the mission case 2 is rotatable around the vertical axis This figure shows a walking-type mobile agricultural machine that is fixedly connected at a certain position and is equipped to be able to change forward and backward directions.

A transmission belt 4a is wound around the engine 1 and the traveling transmission case 2, and the engine output is transmitted into the transmission case 2.
The belt 4a is covered with a cover 4b connected and supported by the transmission case 2.

As shown in FIG. 2, the ends of a forward shift shaft 5 and a reverse shift shaft 6, which are supported in parallel to each other on the mission case 2, are protruded from the lateral side portion of the mission case 2. and engagement receiving members 51 and 61 are provided at both ends of the cage.
is permanently installed.

A transmission arm 7 is disposed at an intermediate portion between these engagement receiving members 5' and 6' and is connected and supported to the transmission case 2 so as to be rotatable about a vertical axis and a horizontal axis.

Then, the speed change arm 7 is selectively engaged with the engagement receiving member 5' or 6' by vertically swinging the speed change swing lever 8 to select forward movement or reverse movement, and the subsequent movement is caused to move forward or backward. The forward shift shaft 5 or the reverse shift shaft 6 is moved in the axial direction by the left-right swing operation of the moving lever 8, and the gear engagement conversion type travel transmission mechanism ( (not shown) to the high speed side by moving the shift shafts 5 and 6 inward of the transmission case, and to the low speed side by moving the shift shafts 5 and 6 outward of the transmission case.

In addition, two pins 9a are provided at the lateral side of the mission case 2, in the vicinity of both the shift shafts 5 and 6.
, 9b are fixed in parallel with the axes of both the shift shafts 5, 6, and the cover 4b is located at a distance from both the shift shafts 5.6 degrees. A restraining tool 10 is mounted, which is formed by bending a spring material into a substantially U-shape when viewed from the shift shaft axis direction so as to be able to reciprocate in a fixed orthogonal direction.

This restraint tool 10 has an upper side 10A due to the movement.
An engaging portion 10a that can be selectively engaged with the forward shift shaft 5 and one pin 9a, and an engaging portion 10b that can be selectively engaged with the other pin 9b and the reverse shift shaft 6 are provided on the lower side 10B. , and these two pattern parts 10a and 10b are engaged with the shift shaft 5 from directions opposite to each other with respect to the center line in the vertical direction of the U-shaped restraining device 10.
, 6 and the pins 9a, 9b.

The control device 10 is exposed outside the cover.
By reciprocating through 0', the shafts are selectively engaged with either one of the shift shafts 5, 6, and in this engaged state, the side surface of the engagement receiving member 5' or 6' (see FIG. 3), and is configured to abut against and prevent the engaged shift shaft 5 or 6 from shifting to the high speed side.

According to the above configuration, when the steering wheel 3 is facing backward, if the restraining device 10 is engaged with the reverse shift shaft 6, high-speed backward movement in this condition is restrained and prevented. In the orientation state, if the restraining device 10 is engaged with the forward shift shaft 5, high-speed reverse movement in this state will be restrained and prevented, thereby causing unexpected high-speed reverse movement due to a maneuvering error, etc. Never.

In addition, in the above example, the restraint tool 10 is provided with one engaging portion 10a on each of the upper side 10A and the lower side 10B.

As shown in FIG. 4, the upper side 10A is provided with one engaging portion that selectively engages both the shift shafts 5 and 6, and the lower side 10B is provided with an engaging portion that selectively engages with both the shift shafts 5 and 6. Even if two engaging portions are provided and these two engaging portions are configured to engage only the pin 11, the desired purpose can be achieved.

Alternatively, the restraint tool 10 may not be supported by the cover 4b, but may be supported by a bracket or the like extending from the fuselage.

Further, in order to engage the restraining device 10 with the fixed receiving portions 9a and 9b, for example, in the case of a pin as in the embodiment, the restraining device 10 may be engaged over the outer circumferential surface of the pin.

Further, the restraint tool 10 is not limited to being formed of a spring material and engaging elastically as described in the embodiment, but may be implemented in a state where the restraining tool 10 is simply contacted and engaged.

Further, the restraining device 10 may be connected in conjunction with the operating handle 3 and configured to automatically move back and forth in conjunction with changes in the forward and backward directions of the operating handle 3.

In summary, in the walking type mobile agricultural machine according to the present invention, in the above-described walking type mobile agricultural machine, the restraining tool 10, which is formed in a substantially U-shape when viewed from the shift shaft axis direction, is supported at both of the shift shafts 5 and 5. , 6, and configured to be able to reciprocate in a direction intersecting the axes of both shift shafts 5, 6, and the upper side 10A and lower side 10B of the restraint tool 10.
In addition, by selectively engaging either of the shift shafts 5 and 6 due to the reciprocating motion, the forward shift shaft 5 or the reverse shift shaft 6 is prevented from moving to the high speed side. An engaging portion that restrains high-speed backward movement in response to a change in the forward/backward direction of the control handle 3, and a machine frame that is synchronized with the engagement of this engaging portion with either the forward shift shaft 5 or the reverse shift shaft 6. and an engaging portion that engages with the continuous fixed receiving portions 9a, 9b, and 11, and both engaging portions are connected to the U-shaped restraining device 1.
The shift shafts 5, 6 and the fixed receiving part 9, which are the respective objects of engagement, are viewed from directions opposite to each other with respect to the center line in the vertical direction of 0.
a, 9b, and 11.

That is, when the restraining device 10 is in a stopped state with both shift shafts 5 or 6, it is engaged with the fixed receiving portions 9a, 9b, 11 connected from the machine frame at least from the opposite direction to the direction of engagement. , the shift shaft 5 or 6, the fixing member 4b, and the fixing receiving part 9a.

It is reliably held in a predetermined position in a three-point state supported by 9b and 11, thereby making it easier to reliably perform the required tensioning action.

In other words, in the present invention, for example, the restraint tool 1 is attached only to the fixed member 4b.
0, the restraining device 10 is firmly supported with an inexpensive structure that effectively utilizes the engagement with both shift shafts 5 and 6, and the above-mentioned effects are achieved. It has the characteristics of

[Brief explanation of drawings]

The drawings show an embodiment of the walking-type mobile agricultural machine according to the present invention, and FIG. 1 is a side view, FIG. 2 is a partially longitudinal side view showing the upper part of the traveling transmission case, and FIG. -1
The line sectional view FIG. 4 is a side view showing another embodiment. 4b... Fixed member, 5... Forward shift shaft, 6... Reverse shift shaft, 9a, 9b.
... Fixed receiving part, 10 ... Restraining device.

Claims (1)

[Claims for Utility Model Registration] A control handle 3 that can be changed forward and backward is provided on the aircraft body, and a forward shift shaft 5 and a reverse shift shaft 6 supported in parallel to each other can be selectively moved in the axial direction. In a walk-behind mobile agricultural machine configured to shift between high and low speeds in a forward state and high and low speeds in a reverse state by moving to restraint device 1
0, its support location is provided in a part of the machine frame remote from both shift shafts 5, 6, and is configured so that it can reciprocate in a direction intersecting the axes of both shift shafts 5, 6, and the upper side of the restraint tool 10 10A and the lower side 10B are selectively engaged with either of the shift shafts 5 and 6 by the reciprocating motion, thereby connecting the forward shift shaft 5 or the reverse shift shaft 6 to the high speed side. An engaging portion that prevents high-speed backward movement in response to a change in the forward/backward direction of the control handle 3, and synchronizes the engagement of this engaging portion with either the forward shift shaft 5 or the reverse shift shaft 6. A fixed receiving portion 9a is connected to the machine frame. 9b and an engaging portion that engages with 11 are provided, and both the engaging portions engage with each other from directions opposite to each other with respect to the center line in the vertical direction of this U-shaped restraining device 10. The target shift shafts 5 and 6 and the fixed receiving part 9a. A walking type mobile agricultural machine, characterized in that it is configured to engage with sb and ii.