JPS6217336Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides for an aircraft equipped with a pair of left and right steering clutches, so that the aircraft can be easily maneuvered with either the front or rear facing forward. A control handle equipped with a pair of left and right operating tools is attached so that it can be changed forward and backward.
A switching mechanism for automatically reversing the interlocking state of the clutch and the operating tool in conjunction with a direction change operation of the handle is attached to the handle and to the body. Attached to the grip side from the base,
A swinging member linked to the switching mechanism via a mechanical interlocking mechanism is provided at the mounting base of the handle, and the swinging member and the cam part provided on the body side are connected to each other when the direction of the handle is changed. By chance,
The present invention relates to a walking type mobile agricultural machine configured to swing the swinging member to operate the switching mechanism.

In the above-mentioned walk-behind mobile agricultural machine, the switching mechanism is located offset from the mounting base of the handle to the machine body toward the grip, so a large handling space can be secured when assembling and disassembling the switching mechanism, and it is cost-effective. While being advantageous in manufacturing, it has the advantage of being easy to assemble and disassemble, and the switching mechanism can be inspected and repaired efficiently.
As described in Publication No. 105434, a swinging member for operating the switching mechanism is constantly biased in the direction of switching the switching mechanism to one interlocking state,
When the direction of the handle is changed, this swinging member swings against the biasing force, and the switching mechanism is switched to the other interlocking state, and the cam part that holds the swinging member in that position is moved toward the fuselage side. Therefore, when the switching mechanism is switched to the one interlocking state, that is, when the swinging member is swinging only by the force and the cam part is not acting, running vibrations and engine vibrations are prevented. Due to the vibration of the machine body, there is a risk that the swinging member swings in the direction of switching the switching mechanism to the other interlocking state, which poses a problem in terms of safety.

That is, the problem is that the stable position of the swinging member, that is, the neutral position, is the same position as the switching position of the switching mechanism to the linked state, and the swinging of the swinging member from this neutral position is as follows. Not limited to contact with the cam part,
This is due to the structure that becomes possible if some force that can resist the biasing force is applied.

In view of the above circumstances, the purpose of this invention is to prevent the interlocking state of the operating tool and the clutch from switching unexpectedly due to aircraft vibration by devising the position and shape of the cam part. do.

The characteristic configuration of the present invention for achieving the above object is that, in the above-mentioned walking type mobile agricultural machine, the swinging member is biased to return to the neutral position, and the swinging member is pivoted from the neutral position in one direction and in the other direction. The switching mechanism is configured to switch between one interlocking state and the other interlocking state in response to each of the swinging movements.
A cam surface that abuts and presses the swinging member in the neutral position to swing when the direction of the handle is changed; and a cam surface that holds the swinging member in the swinging position and returns to the neutral position. A cam portion provided with a position regulating surface is provided on the body side in correspondence with the forward and backward positions of the handle, and this structure provides the following effects.

In other words, when the handle is placed in a predetermined operating position, facing forward or backward, the swinging member is fixed by contact with the cam part, and the switching mechanism is locked in the predetermined interlocking state. Even if the aircraft vibrates due to vibration or engine vibration, the interlocking state between the operating tool and the clutch no longer changes unexpectedly, making it possible to safely operate the aircraft.

Next, embodiments of the present invention will be described based on the drawings.

A transmission case 1 is connected to the rear of the fuselage main body with an engine E mounted on the front part, and a pair of drive axles 2 protrude left and right from the transmission case 1.
A wheel 3 is detachably attached to each of the two axles 2, a control handle 4 is attached to the upper part of the transmission case 1, and a working wheel such as a plowing and traveling wheel is attached to each of the axles 2, 2. A walking-type mobile agricultural machine is constructed in which the wheels 3 can be replaced with wheels 3.

A pair of left and right steering clutches 5, 5 are installed inside the transmission case 1, and a pair of left and right lever-type operating tools 6, 6 for separately operating these clutches 5, 5 are swingable on the handle 4. Both wheels 3, 3 can be adjusted freely by the operating tools 6, 6.
The aircraft is configured to selectively stop the drive and turn the aircraft.

To install the handle 4, see Figures 2 and 3.
As shown in the figure, the cylindrical base 4a is externally fitted onto the pillar 7 erected in the mission case 1 so as to be rotatable around the vertical axis X, and a lock pin is used to rotationally fix the handle 4. 8 is attached to the base 4a so as to be inserted into and removed from the mission case 1 by a swing lever 9, and is configured to be inserted and biased by a spring 10. It is configured so that the mounting direction relative to the aircraft can be changed back and forth.

Grip portion 4b from the cylindrical base 4a of the handle 4
A case 11 is attached to the position deviated to the side, and as shown in FIGS.
3 and a connecting and guiding rod 14 for sliding operation, and the clutches 5, 5 are individually interlocked by a pair of operating wires 16, 16. A pair of operated side interlocking members 17, 17, and a pair of operating wires 18, 18 for both the operating tools 6, 6.
A pair of operating side interlocking members 1 each interlocked with each other by
9 and 19 are fitted onto the support shaft 12 so as to be relatively rotatable in parallel in the axial direction thereof, and between the support shaft 12 and both interlocking members 17 and 19, the support shaft 12 A pair of cylindrical bodies 20 arranged in parallel in the core direction
a, 20b are interposed so as to be relatively rotatable, and extend between one keyway of the operating side interlocking members 19, 19 and one keyway of the both operated side interlocking members 17, 17. 17 and 19, the engaged key 21a and the key groove of the other operation side member 19 and the key groove of the other operated side member 17 are interlocked, and both of the interlocking members 1
Key 21 engaged in order to interlock 7 and 19
b are attached to both the cylindrical bodies 20a and 20b so as to be able to slide and rotate together, thereby forming a mechanism for switching the interlocking state between the clutch 5 and the operating tool 6. .

That is, in a state where both the operating tools 6, 6 are in the clutched operating position, the operating member 1
5 is slid, the keys 21a, 21b
is configured so that the combination of the operating side interlocking member 19 and the operated side interlocking member 17 to be interlocked changes when the operating member 15 is moved to the left and when it is moved to the right. Accordingly, the operating tool 6 and the clutch 5 that are interlocked are configured to be reversed.

On the other hand, as shown in FIGS. 2 and 3, a member 23 swingably attached to the spindle 22 of the handle base 4a is connected to a rod-like member 25 swingably attached to the spindle 24 of the handle 4. A pair of cam portions 27, 27 are formed in the mission case 1 to be interlocked with the operating member 15, to be swing-biased to a neutral state by a spring 26, and to be brought into contact with the swing member 23. In addition, each of the cam portions 27 is provided with a switching mechanism that switches the switching mechanism from one of the forward and backward directions of the handle when the handle 4 is placed almost sideways with respect to the aircraft body, as shown in FIGS. 4A and 4B. An inclined cam surface 27a that comes into contact with the roller 23a of the swinging member 23 so as to switch the switching mechanism, and a slanted cam surface 27a that comes into contact with the roller 23a of the swinging member 23, and a mechanism that fixes the switching mechanism in the forward-facing state or the backward-facing state when the handle 4 is directed forward or backward. A horizontal cam surface 27b is provided as a position regulating surface for swinging and locking the swinging member 23.

That is, as the direction of the handle 4 is changed, the switching mechanism is automatically switched, and the interlocking state of the operating tool 6 and the clutch 5 is changed to one in which the handle 4 is twisted in the direction of the handle 4. When fixed in the forward or rearward direction, the interlocking state of the operating tool 6 and the steering clutch 5 is fixed in a state corresponding to the direction of the handle 4.

Incidentally, instead of the rod-shaped member 25, a structure in which a swinging member and a push-pull member are combined can also be used.In short, any interlocking structure that can lock the switching mechanism by locking the swinging member 23 is sufficient. These are collectively referred to as a mechanical interlocking mechanism 25.

[Brief explanation of the drawing]

The drawings show an embodiment of the walking-type mobile agricultural machine according to the present invention, in which Fig. 1 is an overall side view, Fig. 2 is a plan view of the handle attachment part and switching mechanism, and Fig. 3 is a side view of the same.
FIGS. 4A and 4B are side views showing the operating state of the cam portion. 4... Handle, 4a... Base, 4b... Grip portion, 5... Clutch, 6... Operation tool, 23... Rocking member, 27a... Cam surface, 27b... Position regulating surface, 25... Interlocking mechanism, 27... cam section.

Claims (1)

[Scope of utility model registration request] For an aircraft equipped with a pair of left and right steering clutches 5, 5, the steering handle 4, which is equipped with a pair of left and right operating tools 6, 6 for separately operating both clutches 5, 5, is changed in the front and rear directions. A switching mechanism is provided on the handle 4 to automatically reverse the interlocking state of the clutch 5 and the operating tool 6 in conjunction with a direction change operation of the handle 4. On the other hand, a swinging member 23 is attached to the handle 4 so as to be deviated from the attachment base 4a to the body to the grip portion 4b side, and is linked to the switching mechanism via a mechanical interlocking mechanism 25. When the swinging member 23 comes into contact with the cam portion 27 provided on the body side when the handle 4 is changed in direction, the swinging member 23 swings and the switching mechanism is activated. In a walk-behind mobile agricultural machine that is configured to be operated, the swinging member 23 is urged back to the neutral position, and the swinging member 23 is pivoted from the neutral position in one direction and in the other direction. The switching mechanism is configured to switch between one interlocking state and the other interlocking state in correspondence with each other, and the swinging member 23 is in a neutral position when the direction of the handle 4 is changed.
The cam portions 27, 27 are provided with a cam surface 27a that contacts and presses the cam surface 27a to swing the swing member 23, and a position regulating surface 27b that holds the swing member 23 in the swing position and restricts return to the neutral position. A walking type mobile agricultural machine characterized in that the handle 4 is provided on the machine body side in correspondence with the forward-facing position and the backward-facing position of the handle 4, respectively.