JPS625977Y2 - - 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 even when the front or rear sides of the aircraft are facing forward. A control handle equipped with a pair of left and right operating tools for operation is attached so as to be rotatable in the forward and backward direction, and is interlocked with a pair of operating side interlocking members that are rotated separately by the operating tools. The combination of rotating the pair of operated side interlocking members linked to each of the steering clutches is achieved by a cam section attached to the aircraft body that rotates the movable member attached to the steering handle side when the steering handle is changed in direction. Regarding a walk-behind mobile agricultural machine equipped with a switching mechanism that slides and changes a support shaft in conjunction with pressing movement, the switching mechanism can be easily assembled and disassembled by simple rearrangement of the switching mechanism, Furthermore, even if the handle is rotated while the operating tool remains in the clutch disengaged position, the switching mechanism can be prevented from malfunctioning due to member deformation. The aim is to make it easy.

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/guide rod 14 between the two clutches 5, 5, and a pair of operating wires 16, 16, respectively. operated side interlocking members 17, 17, and a pair of operating side interlocking members 19, which are respectively interlocked with a pair of operating wires 18, 18 with respect to both the operating tools 6, 6,
19 are fitted externally to 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, A pair of cylindrical bodies 20a, 2 arranged in parallel
0b is relatively rotatably interposed, and spans one keyway of the operating side interlocking members 19, 19 and one keyway of the both operated side interlocking members 17, 17, and extends between the two interlocking members 17. , 19, the engaged key 21a and the keyway of the other operating side member 19 and the other operated side member 1
7, and both interlocking members 17,
The key 21b engaged in order to interlock the key 19
are separately attached to both the cylindrical bodies 20a and 20b so as to be able to slide and rotate together,
A switching mechanism is configured to change the combination in which the clutch 5 and the operating tool 6 are interlocked.

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, both keys 21a, 21
b slides, and the combination of the interlocking operating side interlocking member 19 and the operated side interlocking member 17 changes, so that when the operating member 15 is moved to the left side and when it is moved to the right side. The operating tool 6 and the clutch 5 are configured such that the interlocking operation tool 6 and the clutch 5 are reversed depending on the time.

On the other hand, as shown in FIGS. 2 and 3, a swinging member 23 serving as a movable member swingably attached to the spindle 22 of the handle base 4a is swingably attached to the spindle 24 of the handle 4. A mechanical interlocking mechanism constituted by an attached rod-shaped member 25 interlocks with the operating member 15, and a spring 26 urges the swinging member 23 to swing to a neutral state, and as the handle 4 is rotated, the swinging member 23 A protruding cam portion 27 is formed on the machine body that comes into contact with the roller 23a of the machine body, and when the handle 4 is placed sideways with respect to the machine body, it swings as shown in Fig. 4A and Fig. 4B. The member 23 is operated by a cam portion 27, and the switching mechanism is configured to be switched from one of the forward and backward directions of the handle to the other.

In other words, as the steering wheel 4 is operated to change the direction, the switching mechanism is automatically switched, and the interlocking state between the operating tool 6 and the steering clutch 5 is automatically switched to a state corresponding to the direction of the steering wheel 4. It is structured as follows.

As shown in FIGS. 3 and 5, a pair of protrusions 28, 28 are movably attached to the guide rod 14, and a pair of abutting members 29, 29 are attached to the operating side interlocking members 19, 19. When the operating tool 6 is operated to the clutch release position, it is constructed so as to wrap with the protrusion 28 in a side view, as shown in FIG. Even if an attempt is made to rotate the handle 4 with at least one of the tools 6, 6 in the clutch disengaged position, the swinging will not occur due to the contact between the abutting member 29 located within the moving path of the protrusion 28 and the protrusion 28. Part 2
3 is prevented from moving due to contact with the cam portion 27, and the support shaft 12 of the switching mechanism is configured to be prevented from sliding operation.

As shown in FIGS. 6 and 7, two sliding shift shafts 30a and 30b are connected to a traveling gear transmission that can be switched to three forward speeds and one reverse speed.
is made to protrude from the transmission case 1 so as to be able to be pushed and pulled freely, and the operation arm 31 for the shift shafts 30a, 30b is moved between the horizontal axis P1 and the vertical axis P1 with respect to the transmission case ₁ by the gear change lever 32. The shift shafts _30a and 30b are selected by swinging the lever 32 around the horizontal axis _P1 , and the lever 32 swings around the vertical axis _P2 . By operation, the shift shafts 30a, 3
It is configured to shift gears by pushing and pulling 0b. A member 34 interlocked with the rocking accelerator operating member 33 of the engine E is provided near the arm 31 so as to be movable up and down, and is biased downward by a spring 35.
A cam 36 for raising the arm 31 is provided so as to be movable integrally with the arm 31.
is engaged with one of the shift shafts 30a, 30b for the first forward speed and for backward movement, and
Only when the shift shaft 30a is brought to the operating position where the shift shaft 30a is in the neutral position N, the cam 36
The accelerator operating member 33 is configured to come into contact with the idling position as much as possible,
Therefore, when switching the gear transmission from one of the first forward speed state and the reverse speed state to the other, even if the engine E is operated by the accelerator operating tool 37.
Even if the vehicle is maintained at a high speed, it is automatically decelerated to an idling state so that the gear can be changed without disengaging the clutch.

Incidentally, instead of the rod-shaped member 25, a configuration 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 swinging member 23 by locking the operating member 15 is sufficient. ,
These are collectively referred to as mechanical interlocking mechanisms.

Moreover, a sliding member can also be used in place of the swinging member 23, and these members are collectively referred to as the movable member 23.

Further, the abutting member 29 is connected to the operated member 17.
It may be attached to the side.

In summary, the present invention provides the above-mentioned walking type mobile agricultural machine, in which the switching mechanism is attached to the operating handle by being deviated from the attachment base to the machine body toward the grip portion, and the operating member is interlocked and connected to the support shaft. is linked to the movable member via a mechanical interlocking mechanism, and a protrusion that moves together with the sliding of the support shaft is attached to the operating member, and at least one of the pair of left and right operating tools is connected to the movable member. When operated to the cutting position, a contact member that enters into the moving path of the protrusion and abuts and prevents movement of the protrusion due to sliding of the support shaft is connected to the operated-side interlocking member or the operating member. It is characterized by being attached to the side interlocking member.

In other words, the switching mechanism can be moved from the conventionally provided mounting base 4a of the handle 4 to the machine body to the grip portion 4.
Even with a simple modification such as changing the position to the b side,
It has become possible to secure a large space for handling when assembling and disassembling the switching mechanism, making it easier to assemble and disassemble the switching mechanism while being advantageous in terms of cost and production. I am now able to do this more efficiently.

Furthermore, even if you try to turn the handle 4 with the operating tool 6 in the clutch disengaged position,
The movable member 23 is prevented from moving due to the contact between the contact member 29 and the operating member 15, and the switching mechanism is not operated. This prevents the switching mechanism from malfunctioning or becoming inoperable due to deformation and making it difficult or impossible to engage and disengage, thereby extending its service life.

[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 the switching mechanism, Fig. 3 is a side view of the same, and Fig. 4 is an illustration of the side view. , b is a front view showing the operating state of the movable member,
5A and 5B are explanatory diagrams of the action of the abutting member, FIG. 6 is a side view of the speed change operation section, and FIG. 7 is a view taken along the - line in FIG. 6. 4... Handle, 4a... Base, 4b... Grip portion, 5... Clutch, 6... Operating tool, 12... Support shaft, 15... Operating member, 17... Operated side interlocking member, 19... ...Operation side interlocking member, 23...Movable member, 27...Cam portion, 28...Protrusion, 29...Abutting member.

Claims (1)

[Scope of utility model registration request] For an aircraft body equipped with a pair of left and right steering clutches 5, 5, a control handle 4 equipped with a pair of left and right operating tools 6, 6 for separately operating both steering clutches 5, 5 is moved forward and backward. The steering clutches 5, 5 are connected to a pair of operation-side interlocking members 19, 19, which are attached so as to be rotatable to change direction, and are rotated by the operation tools 6, 6, respectively. The combination of rotating the pair of operated-side interlocking members 17, 17 is achieved by pressing the movable member 23 attached to the control handle 4 side by a cam portion 27 attached to the aircraft body side when the direction of the control handle 4 is changed. A walk-behind mobile agricultural machine is provided with a switching mechanism that slides and changes the support shaft 12 in conjunction with movement, and the switching mechanism is located closer to the grip portion 4b than the mounting base 4a of the control handle 4 to the machine body. attached with a deviation from the
The operating member 15, which is interlocked with the support shaft 12, is linked with the movable member 23 via a mechanical interlocking mechanism, and the protrusions 28, 28, which move together as the support shaft 12 slides, are operated. Member 15
When at least one of the pair of left and right operating tools 6, 6 is operated to the clutch release position, it enters the movement path of the protrusions 28, 28, and as the support shaft 12 slides. protrusion 28,
Contact members 29, 29 that contact and prevent movement of 28
is attached to the operated side interlocking members 17, 17 or the operation side interlocking members 19, 19.