JPS5828250Y2 - Agricultural machinery gearbox - Google Patents

Description

[Detailed description of the invention] The present invention relates to a transmission device for a tiller or a management machine that suspends a rotary work machine, etc., and includes wheels installed at the bottom of an upright transmission case, and a steering wheel installed at the top of the case. , an agricultural machine in which an engine is installed in the front part of the case, a rotary working machine is installed in the rear part of the case via a rear hitch, and a speed change lever and a speed change shift plate are installed on the outside of the mission case,
A reverse movement regulating plate is provided that has one end brought into contact with and separated from the speed change shift plate to prevent the plate from moving backward, the intermediate part of the regulating plate is rotatably supported on the side surface of the transmission case, and a clutch of the rotary working machine is provided. The other end of the regulating plate is connected to the lever via a connecting rod, and the rotary working machine is configured to be able to prevent reverse operation by the speed change lever when the working machine is attached and when the clutch lever is operated. The restriction plate can prevent reverse gear change only when the restriction plate is equipped with the restriction plate, and the simple structure including the restriction plate and the connecting rod can be installed at a low cost with almost no changes to conventional specifications, and it is easy to cut grass. It is possible to attach and use other working machines that require koshin operation, such as working machines, as desired, and in particular, by attaching the regulation plate and connecting rod, etc. to the outside of the transmission case, these can be easily attached and detached, and safely. It is an object of the present invention to provide a transmission device for agricultural machinery that is easy to handle and can be used for a variety of purposes.

An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic side view of a small tiller (management machine) which is an agricultural machine, in which an engine 2 is mounted on the front part of a chassis 1, and the rear end of the chassis 1 is fixed to the middle of a transmission case 3.

An axle 4 is mounted on the lower part of the case 3, and a wheel 5 is mounted thereon.A fulcrum shaft 6 is rotatably provided on the upper part of the mission case 3, and the base end of the handle 7 is fixed to the fulcrum shaft 6. and the direction of the handle I can be arbitrarily changed between forward and backward forward and backward directions as required.

When we met, a rear hitch 8 was installed at the middle rear of the mission case 3.
A rotary working machine 9 is detachably installed on this hitch 8, and the PTO shaft 10 of the mission case 3 and the working machine 9 are connected to each other.
A transmission case 11 is installed between them, and a tilling rotary 13 is interlocked and connected to the PTO shaft 10 via a clutch (not shown) that is engaged and disengaged by a clutch lever 12.

Furthermore, a main shaft 14 is provided protruding from the upper side of the mission case 3, and a main shaft pulley 15 mounted on the main shaft is connected to the output pulley 16 of the engine 2 via a belt 17, and a plurality of transmission gears ( (Illustrations omitted)
The above-mentioned shafts 4, 10, 14 are connected to each other via.

In addition, there are first and second main shift shafts near the main shaft 14.
18.19 and the sub-shift shaft 20 are made to protrude, and the main shift lever 21 is moved to the first and second main shift shafts) 18.19
is connected to the main transmission shift plate 22 via the main transmission shift plate 22, and
The auxiliary transmission lever 23 is connected to the auxiliary transmission shaft 20 via the auxiliary transmission shift plate 24.

Next, as shown in FIGS. 2 to 4, the support cylinder 25 is rotatably supported by a shaft 26 on the side of the mission case 3,
A cylindrical shaft 27 integrally formed with the main transmission shift plate 22 is rotatably fitted into the support cylinder 25, and the base end of the main transmission lever 21 is slidably and rotatably inserted into the cylindrical shaft 27. A spring 28 is applied to the lower end.

Positioning holes 29 and 30 are formed in the shift plate 22.
At the same time, an L-shaped copper plate 31 is inserted into either of the holes 29 and 30 in a detachable manner.
The lever 2 is integrally formed with the
1 is attached so that the direction can be freely changed back and forth.

A cover plate 34 is provided above the main transmission shift plate 22 in which the working end 22a is engaged with either of the engagement notches 32, 33 of the first and second main transmission shafts NB, 19 described above.

Further, an H-shaped shift display groove 35 forming a 14th gear section 35a, a 2.5 gear section 35b, a 3rd gear section 35c1, and a reverse gear section 35d is provided in the cover plate 34, and the shift plate 22 The gear shift display end 22b is connected to the groove 35.
It is formed so as to display the shift position by the main shift lever 21.

Further, a support shaft 36 is provided protruding from the lower surface of the cover plate 34,
One end of a main speed change high speed regulating plate 37 is rotatably supported on this support shaft 36 .

The operating end 37a of the regulating plate 37 is extended outward from the cover plate 34, and notches 38 and 39 into which the base of the operating end 37a is inserted are formed on the side edges of the cover plate 34, and a main transmission is provided above the engine 2. When the lever 21 is positioned and the copper plate 31 is inserted into the positioning hole 30, by bringing the working end 37b of the regulating plate 37 close to the copper plate 31, the shift display end 22b of the main shift shift plate 22 is displayed. 3rd gear step part 35cK of groove 35
One side is configured to come into contact with the working end 37b.

Further, a main shift reverse movement regulating plate 40 having an operating end 40a extending above the display end 22b of the main shift shift plate 22 is provided.

The regulating plate 40 is rotatably supported in the middle on a support shaft 41, and has an operating end 4 formed at the other end of the regulating plate 40.
0b is connected to the clutch lever 12 of the rotary work machine 9 via the coupling rod 42, and when the rotary 13 is driven by operating the clutch lever 12 of the rotary work machine 9, the clutch lever 12 In conjunction with the switching, the working end 40a of the regulating plate 40 approaches the shift plate 22, and the display end 22b of the shift plate 22 moves toward the reverse gear section 35.
d, the side surface of the display end 22b is placed on the regulation plate 4.
It is configured to abut against the 00 working end 40a.

Further, a support plate fixed to the side surface of the transmission case 3 at the middle of the U-shaped auxiliary transmission shift plate 24, which has one end connected to the auxiliary transmission shaft 20 via a pin 43 and the base end of the auxiliary transmission lever 23 fixed to the other end. 44 via a pin 45 so as to be horizontally rotatable.

A support shaft 46 protrudes from the upper surface of the support plate 44, and the middle of the sub-shift high-speed regulation plate 47 is horizontally rotatably supported on the support shaft 46, and a U-shaped notch 48 is formed in the operating end 47a of the regulation plate 47. The sub-shift lever 2 is formed in this notch 48.
The regulating plate 47 is fitted into the base end portion of the control plate 47 so as to move in conjunction with the sub-shift operation of the shift plate 24 that moves the sub-shift shaft 20 forward and backward, and the copper plate 31 is inserted into the positioning hole 30. When the main gear shift lever 21 is positioned in the engine 2 direction, the regulating plate 47 is placed on the side of the copper plate 31.
The operating end 47b of the gearbox is configured to abut against it and prevent high-speed switching of the sub-shift.

The present invention is constructed as described above, and as shown in FIGS. 5 and 6, by operating the clutch lever 12 of the rotary working machine 9, the active end 40a of the main shift reverse movement regulating plate 40 is moved to the main shift shift plate 22. When the lever 12 is engaged and the rotary 13 is engaged in plowing work, the operating end 40a of the regulating plate 40 is positioned on the side of the display end 22b of the shift plate 22, and the reverse step portion 35d
The operating end 40a prevents the display end 22b from entering the main shift lever 21, making it impossible to perform a reverse shift using the main shift lever 21.

On the other hand, by operating the clutch lever 12, the rotary 1
3 is stopped, the regulation plate 40 returns in conjunction with this, allowing the display end 22b to be inserted into the reverse gear portion 35d, and the main shift lever 21 to perform reverse gear shifting.

Among these, the switching between the 1st, 4th, 2.5th, and 3rd speeds by the shift levers 21 and 23 can be performed independently of the operation of the regulation plate 40.

As shown in the above embodiments, the present invention has the wheels 3 attached to the lower part of the transmission case 3 which is installed upright, the handle I attached to the upper part of the case 3, and the engine 2 mounted to the front part of the case 3.
A rotary work machine 9 is installed at the rear of the case 3 via a rear hitch 8, and a gear shift lever 21 and a gear shift plate 2 are mounted on the outside of the mission case 3.
2, the agricultural machine includes a reverse movement regulating plate 40 that has one end brought into contact with and separating from the speed change shift plate 22 to prevent the plate 22 from moving backward, and the middle of the regulating plate 40 is rotated to the side surface of the transmission case 3. freely supported,
The other end of the regulating plate 40 is connected to the clutch lever 12 of the rotary working machine 9 via the connecting rod 42, and when the working machine 9 is installed and the clutch lever 12 is operated, the gear shift lever 21 can be used to perform a backward movement operation. □, the restriction plate 40 can prevent reverse gear change only when the rotary working machine 9 is attached, and the restriction plate 40 and the connecting rods 4' and 2 are excellent. It has a simple configuration that includes, and can be installed at a low cost with almost no changes to conventional specifications, and 1. You can optionally attach and use other working machines that require backward operation, such as grass cutting machines;
Particularly, by attaching the regulating plate 40, the connecting rod 42, etc. to the outside of the mission case 3, they can be easily attached and detached, and have remarkable effects such as being safe to handle, versatile in use, and highly practical. It is something that plays.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a schematic side view of a small power cultivator, Fig. 2 is an enlarged side view of the main parts, Fig. 3 is a plan view of the same, and Fig. 4 is a partially cutaway view. The cutaway plan view, FIGS. 5 and 6 are explanatory views of the main parts. 9...Rotary work machine, 12...Clutch lever 21...Main gear shift lever 40...
... Reverse control plate.

Claims (1)

[Scope of utility model registration request] The wheels 3 are attached to the lower part of the mission case 3 that is set upright, and the needle handle 7 is attached to the upper part of the case 3. The engine 2 is attached to the front of the case 3, and the rotary work machine is attached to the rear of the case 3 via the rear hitch 8. 9, and further incorporates a speed change lever 21 and a speed change shift plate 22 on the outside of the transmission case 3,
A reverse movement regulating plate 40 is provided, one end of which is brought into contact with and separated from the speed change shift plate 22 to prevent the plate 22 from moving backward. The regulating plate 40 is connected to the clutch lever 12 of the rotary working machine 9 via the connecting rod 42.
A transmission device for agricultural machinery, characterized in that the other end of the transmission device is connected to the other end of the transmission device, and is configured to be able to prevent reverse operation by the transmission lever 21 when the work implement 9 is attached and the clutch lever 12 is operated.