JPH0514734Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a reaping machine in which a reaping device is attached as an attachment to the front of a mobile agricultural machine.

(b) Prior art Conventionally, in a reaping machine in which a reaping device is attached as an attachment to the front hit of a mobile agricultural machine, a transmission case is attached to the front hit, and a belt is attached to an engine pulley and a driven pulley of an intermediate shaft supported in front of the engine pulley. The drive pulley of the intermediate shaft and the pulley of the driven shaft supported at the lower part of the transmission case are driven by a vertical belt, and an arm having a sprocket at the front end protrudes from the front surface of the transmission case. It is already known that a pair of left and right cams attached to the driven shaft are interlocked with the sprocket by a chain, and a crank for driving the cutting blade is attached to the shaft of the sprocket.

(c) Problems to be solved by the invention The known reaper requires an intermediate shaft, two pulleys attached to it, and a vertical belt to drive the driven shaft that transmits power to the reaping device. The transmission device became complicated, resulting in increased weight and cost, and the chain, sprocket, and horizontally swinging crank for driving the cutting blades became tangled and entangled with weeds and straw debris.

(d) Means for solving the problem The present invention is a reaper in which a reaping device is attached as an attachment to the front of a mobile agricultural machine, and an engine is mounted on the main body frame. It is located at the rear and below the main body frame of the mobile agricultural machine, the output pulley of the engine and the input pulley of the transmission case are directly interlocked via a belt, and the output shaft of the transmission case protrudes downward. The above-mentioned problem was solved by attaching a crank arm to the output shaft to drive the Pittman lever that transmits power to the cutting blade.

(E) Function The engine pulley of a mobile agricultural machine directly drives the input pulley of the transmission case with a single belt, and the output shaft protruding downward from the transmission case drives the crank arm along the bottom surface of the transmission case. Therefore, the crank arm rotates while being covered by the transmission case, and there is no possibility that straw or weeds will become entangled or wrapped around the crank arm. Further, since the pittman lever driven by the crank arm only moves back and forth, weeds and straw debris will not become entangled or wrapped around it.

(F) Example An example of the present invention will be explained with reference to the drawings.
1 is a two-wheeled mobile agricultural machine, which has a main body frame 2;
An engine 3 is mounted on the front part of the engine 3, a transmission case 4 is attached to the rear part of the engine 3, and a support arm 7 for supporting a balance weight 6 is removably attached to the rear hitch 5 with a connecting pin 8. At the top of the case 4 is an input pulley 1 driven by an output pulley 10 of the engine 3 via a belt 11.
A pair of left and right wheels 1 are mounted on the lower axle.
3 and 13 are installed.

The reaping device 16 attached to the front hitch 15 at the front end of the main body frame 2 includes a reciprocating type reaping blade 17, a reaping frame 18, and a mounting frame 20.
and a transmission case 21, and the mounting frame 20 has the front hitch 15 on its upper rear surface.
A rear plate 23 has a mounting bracket 22 that fits into the rear plate 23, and bolts 25,
25 and a front plate 26 which is U-shaped in plan view and hangs down to the top of the reaping frame 18, and left and right brackets 27, 27 rising from the reaping frame 18 are connected to the front plate 26. It is screwed onto the part plate 26, and the mount 22 is connected to the front hitch 15 with a connecting pin 22a.

Furthermore, the cutting blade support frame 2 of the reaping device 16
8 has a central part that protrudes rearward, and this protrusion 2
8a is attached to the cylindrical portion of the front end of the reaping frame 18.
The reaping device 16 is connected so that it can tilt to a certain extent with respect to the inclination of the field in the left and right direction by inserting the pin 30 loosely into these and fixing it.
Fixed blade 31 screwed onto the cutting blade support frame 28
The movable blade 32 superimposed on the top is screwed onto a knife bar that slides laterally, the one in the middle is further screwed into a swinging member 33, and the one on both sides is screwed onto the fixed blade 31 by blade holders 34... A Pitman lever 3 is in pressure contact and pivoted at its midway point by a vertical fulcrum pin 35.
6 has an engagement pin 37 in the front part, and this engagement pin 3
The roller 38 that is loosely fitted into the blade support frame 28 is fitted into a recess 39 formed on the lower surface of the swinging member 33, and the front hanging portion 39a forming the recess 39 is a sliding member fixed to the upper surface of the cutting blade support frame 28. It is in sliding contact with the upper surface of the plate 40.

The transmission case 21 that drives the rear part of the Pittman lever 36 to reciprocate in the lateral direction is connected to a plate 26 connecting the lower rear surface of the front plate 26.
a, the transmission case 21 includes a bevel gear 43 fixed to a horizontal input shaft 42, which is mounted at a position rearward of the front hitch 15 and below the main body frame 2 of the mobile agricultural machine. A bevel gear 45 loosely fitted onto the output shaft 44 in the vertical direction is meshed and housed, and power to the reaping device 16 is supplied by a dog clutch 47 that is slidably attached to the output shaft 44 and engages and disengages from the bevel gear 45. The dock clutch 47 is operated by a lever 47a and a wire 47b, and is connected to the input pulley 4 fixed to the input shaft 42.
8 is connected to the output pulley 10 via a vertical V-belt 51 to which a tension pulley 50 is attached.
A crank arm 52 , which is interlocked with and fixed to the lower part of the output shaft 44 , has a crank pin 53 and a balance weight 54 , and the crank pin 53 is fitted into the rear end of the Pitman lever 36 .

Further, the outer surface of the input pulley 48 and the front surface from its lower part are covered with a transmission cover 55, the front and side surfaces of the mounting frame 20 are covered with a guide cover 56, and a guide plate 57 is mounted on the pitman lever 36. A guide rod 58 is attached to the member 33.

In the above-mentioned reaping machine, when the mobile agricultural machine 1 runs while driving the reaping device 16, the reaping device 16
cut grass and other standing crops.

At this time, since the heavy transmission case 21 is provided at the rear side of the front hitch 15 and below the main body frame 2, it is possible to lower the center of gravity of the machine and prevent it from moving forward significantly. This prevents the floating force of the handle 9 from becoming abnormally large, making it possible to perform light maneuvering.
Since it is directly driven by the output pulley 10 of the engine 3 mounted above via the V-belt 51, it is possible to reduce the cost and improve the transmission efficiency by making the transmission means such as the belt smaller.

Further, the hanging portion 3 of the swinging member 33 of the reaping device 16
Since the movable blade 9a is brought into sliding contact with the sliding plate 40 over its lateral movement range, the movable blade 3 in the central portion is moved as shown in FIG.
The bar 60 extended from 2 is connected to the Pittman lever 3.
When the cutting blade 17 is tilted from side to side around the engagement pin 37, such as when the cutting blade 17 is brought into contact with the regulating plate 61 fixed to the blade 6, a gap l is created, and the movable blade 32 near the center part does not float up. , no matter which side the mowing blade 17 tilts, the hanging portion 39a is always pressed somewhere on the sliding plate 40, and the movable blade 32 is connected to the fixed blade 3.
1 can be reaped while always being in reliable pressure contact with the material.

(G) Effect of the invention The present invention provides a reaping machine in which the reaping device 16 is attached to the front part of the mobile agricultural machine as an attachment, and the engine 3 is mounted on the main body frame 2.
6 is located behind the front hitch 15 and below the main body frame 2 of the mobile agricultural machine, and the output pulley 10 of the engine 3 and the input pulley 48 of the transmission case 21 are connected to the belt 51.
The output shaft 44 of the transmission case 21 is made to project downward, and the crank arm 52 is attached to the output shaft 44 to drive the Pittman lever 36 which transmits power to the cutting blade. The transmission device from the engine 3 to the input pulley 48 of the transmission case 21 can be simplified, weight and cost can be reduced, and transmission efficiency can be improved.

Furthermore, since the crank arm 52 rotates while being covered by the transmission case 21, it is possible to prevent straw and weeds from becoming entangled or wrapped around the crank arm 52 and the output shaft 44.

Furthermore, the Pitman lever 36, which is linked to the crank arm 52, extends forward from the transmission case 21, but since it only moves back and forth, straw and weeds do not become entangled or wrapped around it, ensuring smooth transmission. It can be performed.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
Figure 1 is a side view of the reaper, Figure 2 is a partially omitted plan view of the reaping device, Figure 3 is a partially cutaway side view of the same, and Figure 4a is the transmission case and its accompanying parts. FIG. 5 is a partially cutaway side view of the movable blade regulating section, b is a front view of the same, and FIG. 2... Body frame, 16... Reaping device, 18
... Reaping frame, 21 ... Transmission case.

Claims (1)

[Scope of utility model registration request] A reaping device 16 is attached to the front of the mobile agricultural machine as an attachment, and an engine 3 is attached to the main body frame 2.
In the reaping machine equipped with this, the transmission case 21 of the reaping device 16 is located behind the front hitch 15 and below the main body frame 2 of the mobile agricultural machine, and the output pulley 10 of the engine 3 and the transmission case 2
The output shaft 44 of the transmission case 21 is directly interlocked with the input pulley 48 of the transmission case 21 via the belt 51.
The reaper is characterized in that the output shaft 44 is configured to project downward, and a crank arm 52 is attached to the output shaft 44 to drive a pitman lever 36 that transmits power to the cutting blade.