JP4082048B2 - Cultivator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cultivator.
[0002]
[Prior art]
For walking-type tillers and management machines, the finger clutch device provided on the operation handle is used as a deadman clutch for safety during reverse travel, but the finger clutch lever of the finger clutch device is engaged when moving forward or during work. Need to keep on.
[0003]
[0004]
[Problems to be solved by the invention]
While trying to move the aircraft forward or work without holding the finger clutch, it tries to ensure safety during reverse travel.
[0005]
[Means for Solving the Problems]
For this purpose, the present invention is provided with a traveling gear case (2) having a transmission mechanism (2a) therein, and the traveling axle (7) is rotated on both the left and right sides of the transmission mechanism (2a) of the traveling gear case (2). A rotary wheel (8) is provided at the outer end of each traveling axle (7), and a connecting hitch (12) is provided on the rear side of the traveling gear case (2). 13) A tensioning device (24) for turning on and off the belt (4b) spanned between the engine pulley (4a) and the input pulley (2c) of the traveling gear case (2). ), A box-shaped operation case (27) is provided on the operation handle (14) of the machine body, and a tension clutch shaft (28) is pivotally supported on the operation case (27), and the tension clutch shaft (28) is supported. Te with a long hole (29a) The suspension arm (29) is pivotally supported, and a clutch cable (24a) is connected between the rear end of the tension arm (29) and the tension device (24), and the operation case (27 The finger clutch lever shaft (30) is pivotally supported on the finger clutch lever shaft (30), and the finger clutch lever device (31) is pivotally supported on the finger clutch lever shaft (30). A finger clutch lever (31b) is fixed to one side of the arm (31a), and a pin (31c) is fixed to the other side. The pin (31c) is a long hole of the tension arm (29). (29a), a rotation restricting tool (32) having a substantially L-shape and having a protrusion (32a) on one side is provided inside the finger clutch lever device (31) of the operation case (27). Pivotally supported, Between the rotation limiter (32) and the speed change lever (15), a limit cable (32b) is provided and connected, and the protrusion (32a) of the rotation limiter (32) is connected to the tension arm (29). The airframe travels or travels via the tension arm (29), the clutch cable (24a), and the tension device (24) by the "on" / "off" operation of the finger clutch lever device (31). Further, the rotation limiter (32) is configured to be able to be inserted and removed on the rotation trajectory of the finger clutch lever device (31), and when the speed change lever (15) is operated to "reverse", This is a cultivator configured to return the finger clutch lever device (31) to the “off” side.
[0006]
Thereby, at the time of advancing or working, the aircraft moves forward without having to keep holding the finger clutch lever 31b of the finger clutch lever device 31. By adopting a mechanism that switches to the deadman clutch only during reverse travel, when the vehicle is in a dangerous state due to reverse travel, the tiller is automatically stopped simply by releasing the finger clutch lever 31b.
[0007]
[0008]
【The invention's effect】
Thereby, it is not necessary to keep holding the finger clutch lever 31b of the finger clutch lever device 31 at the time of advance or work, and the work is easy. By adopting a mechanism for switching to the deadman clutch only during reverse travel, when the vehicle is in a dangerous state due to reverse travel, the tiller is automatically stopped simply by releasing the finger clutch lever 31b from the hand.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The present invention is a fuel to be mounted between a traveling gear case 2 of a walking type tiller 1 and an engine 4 mounted on an upper side of a chassis frame 3 provided to project forward to the front side of the traveling gear case 2. The tank 5 is provided with a receiving stay 6 having a mounting U-shaped groove 6 a at the upper part of the traveling gear case 2, and the U-shaped groove 6 a of the receiving stay 6 is provided so as to protrude from the outer shape of the fuel tank 5. The fuel tank 5 is mounted by inserting the protruding portion 5b. The fuel tank 5 and the receiving stay 6 will be mainly illustrated and described.
[0010]
As shown in FIGS. 1 to 3, the cultivator is provided with a traveling gear case 2 having a transmission mechanism 2a, and a traveling axle projecting outward is provided on the left and right sides of the lowermost end of the transmission mechanism 2a of the traveling gear case 2. 7 is rotatably supported, and a traveling wheel 8 is pivotally supported at the outer end of each traveling axle 7.
[0011]
As shown in FIG. 1, a U-shaped chassis frame 3 protruding forward is mounted on the front side of the traveling gear case 2 with bolts, nuts, and the like. The engine 4 is mounted and mounted on the upper side of the chassis frame 3 with bolts and nuts.
[0012]
An engine pulley 4a is rotatably supported on the engine shaft of the engine 4, and an input pulley 2c is rotatably supported on the upper input shaft 2b of the uppermost portion of the transmission mechanism 2a of the traveling gear case 2. The input pulley 2c and the engine pulley 4a are provided with a belt 4b. Due to the rotation of the engine 4, the transmission mechanism 2 a of the traveling gear case 2 is rotationally driven through the pulleys 4 a, 2 c and the belt 4 b, and the traveling wheels 8 are rotationally driven through the traveling axles 7. The machine 1 is configured to travel.
[0013]
A front hitch 9 is fixedly provided at the front end of the chassis frame 3 as shown in FIG. A stand (not shown) is rotatably provided below the front hitch 9. An engine cover 10 is provided on the upper side of the engine 4 so as to be opened and closed as shown in FIG. Further, the engine muffler 11 positioned on the outside of the engine cover 10 at the upper part of the engine 4 is mounted on the upper part of the engine 4 with bolts, nuts and the like.
[0014]
The front side of the upper part of the traveling gear case 4 has a substantially U-shaped plan view as shown in FIGS. 1 to 3 and a receiving stay 6 formed in a vertical width (L) in the vertical direction, such as a bolt and a nut. Thus, the configuration is provided by mounting. The front end portions on the left and right sides of the receiving stay 6-shaped have a configuration in which a substantially U-shaped U-shaped groove 6a is formed, and the groove width of the U-shaped groove 6a is formed in (M).
[0015]
The left and right sides of the outer shape of the fuel tank 5 are provided with protruding portions 5a that protrude outward as shown in FIGS. The width of the protruding portion 5a is such that the groove width of the U-shaped groove 6a of the receiving stay 6 is slightly narrower than (M1) than (M), and the vertical width in the vertical direction is the vertical width of the receiving stay 6. It is the structure formed in the predetermined width (L1) of the substantially same width as (L). On the upper side of the projecting portion 5a, there are provided upper projecting portions 5b which are formed wider than the narrow width (H1) and whose vertical width is a predetermined width. These projecting portions 5a and upper projecting portions 5b are provided. Is a configuration that is formed integrally with the outer shape.
[0016]
The protrusions 5 a provided on the left and right sides of the outer shape of the fuel tank 5 are inserted into U-shaped grooves 6 a provided on the left and right sides of the receiving stay 6, and the upper protruding portion 5 b contacts the upper side surface of the receiving stay 6. It is the structure which inserts until it mounts. The fuel tank 5 is configured to be mounted between the traveling gear case 2 and the engine 4 and to be placed.
[0017]
Each protrusion 5a provided in the fuel tank 5 is inserted into each U-shaped groove 6a of the receiving stay 6 provided in the traveling gear case 2 so that the fuel tank 5 is installed in the traveling gear case 2. However, it is only necessary to insert each protruding portion 5a into each U-shaped groove 6a, and it is easy to mount and can be easily mounted. In addition, it is not necessary to provide a flange for mounting the fuel tank 5, so that the outer shape of the fuel tank 5 can be increased and the tank capacity can be increased.
[0018]
As shown in FIG. 1, a connecting hitch 12 is mounted on the rear side of the traveling gear case 2 with bolts and nuts. The connection hitch 17 is configured to be attached with a rotary tiller 13 provided with tilling claws 13a when tilling the field. The input of power to the rotary tiller 13 is input from the transmission mechanism 2a of the traveling gear case 2 so that the rotary tiller 13 is driven to rotate.
[0019]
As shown in FIG. 1, an operating handle 14 for driving is mounted on the upper side surface of the traveling gear case 2 via a fixture 14a. The operation handle 14 is provided with a shift lever 15a, left and right clutch levers 15b and 15c, a travel clutch lever 15d, and the like.
[0020]
In the configuration in which the upper input shaft 2b is provided above the transmission mechanism 2a of the traveling gear case 2, the upper input shaft 2b is provided with a hydraulic pump 16a of the hydraulic continuously variable transmission 16 as shown in FIG. It is. At one end of the upper input shaft 2b, on the outer side of the traveling gear case 2, an input pulley 2c for inputting power is provided rotatably and axially supported via the belt 4b from the engine pulley 4a of the engine 4. The cooling fan 17 is rotatably supported at the other end of the upper input shaft 2b on the outer side of the traveling gear case 2. The cooling fan 17 cools the traveling gear case 2 and the hydraulic pump 16a.
[0021]
As a result, in the conventional configuration in which the input pulley 2c and the cooling fan 17 are rotatably supported on one side of the traveling gear case 2, if the work is performed in the upland area, the cooling fan 17 causes dust to be collected. The dust is sucked and the dust adheres to the belt 4b, and the belt 4b may be worn and damaged at an early stage. However, according to the present invention, the cooling fan 17 is provided on the opposite side of the belt 4b. The durability of 4b could be improved.
[0022]
In the walking type tiller 18, as shown in FIG. 5, a traveling axle 19 provided on both the left and right sides of the lower part of the traveling gear case 2 is provided with a tilling device 20 having a tilling claw 20 a and a rear side of the traveling gear case 2. The connecting hitch 12 is provided with a box-shaped support 21 inserted into the connecting hitch 12 and connected by hitch pins 21a.
[0023]
As shown in FIG. 5, a crank-shaped resistance rod 22 is inserted into the support 21 and mounted with bolts or the like. The bending angle of the crank portion of the resistance rod 22 is configured to be (L1) and (L2). When the field to be cultivated by the cultivator 20 is soft, the resistance bar 22 is mounted with the small bending angle (L1) on the upper side in order to reduce the resistance applied to the field. Further, when the field is hard, in order to increase the resistance applied to the field, it is mounted with the large bending angle (L2) on the upper side. Thereby, it is the structure which can be cultivated with a fixed tillage depth even in a hard field.
[0024]
Thus, by recombining the resistance rod 22 with the softness of the field, it is possible to cultivate at a fixed tillage depth regardless of the hardness of the field. As shown in FIGS. 6 and 7, the cultivator 18 for walking hangs a belt 4b on an engine pulley 4a provided on the engine 4 and a pulley 2c provided on the upper input shaft 2b of the traveling gear case 2. It is a passed configuration. A clutch cable 24a is provided and connected between the tension device 24 for turning on and off the belt 4b and a travel clutch lever 15d provided on the operation handle 14. The tension device 24 is turned “on” and “off” via the travel clutch cable 24a by the “on” and “off” operations of the travel clutch lever 15d, and the cultivator 18 travels or stops traveling. is there.
[0025]
As shown in FIGS. 6 and 7, an operating device (a differential device) 23 is built in the traveling axle 19 at the lower end of the traveling gear case 2. The operation unit 23a of the actuating device 23 is provided with a rotation plate 23b, and an operation cable 25a is provided and connected between the rotation plate 23b and the operation lever 25 provided on the operation handle 14. It is. A spring 26 is provided and connected between the rotating plate 23 b and the receiving pin 26 a provided on the traveling gear case 2.
[0026]
By rotating the operating lever 25 upward, the rotating plate 23b is rotated to the position (a) via the operating cable 25a, and the operating portion 23a of the operating device 23 is operated. Is a working configuration. In conjunction with this, in the case of a left turn operation, the rotation speed of the right tillage device 20 is rotationally driven at a substantially double speed with respect to the rotation speed of the left tillage device 20, and turns left. is there. In the case of a right turn operation, the configuration is opposite to the above. Further, by rotating the operating lever 25 downward, the rotating plate 23b is rotated to the (b) position via the operating cable 25a, and the operating portion 23a of the operating device 23 is operated, and this operating device. Reference numeral 23 denotes a configuration in a locked state. In conjunction with this, the tilling devices 20 on both the left and right sides are configured to rotate at substantially the same rotational speed. Further, the rotating plate 23b is configured so that a force that always rotates in the (c) direction is exerted by the spring 26.
[0027]
As a result, the operating portion 23a of the operating device 23 is turned into the operating state and the locked state by turning the rotating plate 23b in the same direction by the operation of the spring 26, so that the cultivator Only when the 18 is turned, the actuating device 23 is in an actuated state, so that the straightness is improved. Further, when the operating device 23 is activated or locked by operating the operating lever 25, the operating lever 25 does not require any parts to be locked, and the operating lever 25 is always restored to the locked state. The operation is simple.
[0028]
As shown in FIGS. 8 and 5, the operation handle 14 is provided with a box-shaped operation case 27. The operation case 27 is provided with a tension clutch shaft 28 supported on the tension clutch shaft 28. The tension arm 29 having a long hole 29a is pivotally supported. Between the rear end of the tension arm 29, the engine pulley 4a and the input pulley 2c of the traveling gear case 2, there is a clutch between the tension device 24 that "turns on" and "turns off" the belt 4b. The cable 24a is provided and connected. Accordingly, when the tension arm 29 swings downward around the tension clutch shaft 28, the tension device 24 tensions the belt to “engage” the power connection clutch, and when the tension arm 29 swings upward, the tension device 24 relaxes. Thus, the power cut-off clutch is turned “off”, and the “on” and “off” positions are held at the respective operation positions.
[0029]
The operation case 27 is provided with a finger clutch lever shaft 30 that is pivotally supported. A finger clutch lever device 31 is pivotally supported on the finger clutch lever shaft 30. A finger clutch lever 31 b is fixedly provided on one side of the finger lever arm 31 a of the finger clutch lever device 31, and a pin 31 c is fixedly provided on the other side. The pin 31 c is the length of the tension arm 29. It is the structure inserted in the hole 29a. Accordingly, when the finger clutch lever 31b of the finger clutch lever device 31 is operated upward, the tension arm 29 is swung downward to make the clutch "ON", and when the finger clutch lever 31b is swung downward, the clutch is turned "OFF". .
[0030]
On the finger clutch lever shaft 30 of the operation case 27, a rotation limiter 32 having a substantially L shape on the inner side of the finger clutch lever device 31 and having a protrusion 32a on one side is pivotally supported. It is a configuration. Between the rotation limiter 32 and the speed change lever 15, a limit cable 32b is provided and connected. The protrusion 32 a of the rotation restrictor 32 is configured to abut on the tension arm 29.
[0031]
The tiller 18 travels or stops traveling through the tension arm 29, the clutch cable 24a, the tension device 24, and the like when the finger clutch lever device 31 is turned on and off. Further, only the range in which the finger clutch lever device 31 returns reliably to the “off” side stopper can be operated. Further, the rotation limiter 32 is configured to be able to be taken in and out of the rotation path of the finger clutch lever device 31 (the tension arm 29 in the illustrated example), and when the speed change lever 15 is operated to “reverse”, this is linked. The finger clutch lever device 31 always returns to the “off” side after sealing the track. That is, when the rotation restricting device 32 is not on the track, it is held at the clutch “on” / “off” operation position. When “ON” is selected and the finger clutch lever 31 b is released, the clutch is disengaged due to the weight of the tension device 24.
[0032]
Accordingly, it is not necessary to keep holding the finger clutch lever 31b of the finger clutch lever device 31 at the time of forward movement or work, and the work is easy. By adopting a mechanism that switches to the deadman clutch only during reverse travel, when the vehicle is in a dangerous state due to reverse travel, the tiller 18 can be safely stopped simply by releasing the finger clutch lever 31b from the hand.
[Brief description of the drawings]
FIG. 1 is a partially cutaway side view of a field cultivator. FIG. 2 is an enlarged side perspective view of a fuel tank. FIG. 3 is a front view of a fuel tank. FIG. FIG. 5 is a diagram showing another embodiment of the present invention, FIG. 5 is a diagram showing another embodiment, and FIG. 6 is a side view of the resistance rod portion of the tiller. FIG. 6 is a diagram showing another embodiment, FIG. 7 is a diagram showing another embodiment, and FIG. 8 is an enlarged side view of an operating device portion of a traveling gear case and an operation cable portion. FIG. 8 is a diagram showing another embodiment. , Side view of tiller unit, finger clutch lever unit, and shift lever unit [Explanation of symbols]
2 traveling gear case 2a transmission mechanism 2c input pulley 3 chassis frame 4 engine 4a engine pulley 4b belt 5 fuel tank 5a protrusion 6 receiving stay 6a U-shaped groove 7 traveling axle 8 traveling wheel 12 connection hitch 13 rotary tillage device 14 operation handle 24 Tension device 24a Clutch cable 27 Operation case 28 Tension clutch shaft 29 Tension arm 29a Long hole 30 Finger clutch lever shaft 31 Finger clutch lever device 32 Rotation limiter 32a Projection portion 32b Limit cable

Claims (1)

A traveling gear case (2) having an internal transmission mechanism (2a) is provided, and a traveling axle (7) is rotatably supported on the left and right sides of the transmission mechanism (2a) of the traveling gear case (2). In a field cultivator equipped with a traveling wheel (8) at the outer end of the traveling axle (7), a connecting hitch (12) on the rear side of the traveling gear case (2), and a rotary tiller (13). , A tension device (24) is provided for "on" and "off" the belt (4b) spanned between the engine pulley (4a) and the input pulley (2c) of the traveling gear case (2), and the operation handle of the fuselage In (14), a box-shaped operation case (27) is provided, and a tension clutch shaft (28) is pivotally supported on the operation case (27), and a tension hole (29a) is provided on the tension clutch shaft (28). Arm (29) A clutch cable (24a) is connected between the rear end of the tension arm (29) and the tension device (24), and a finger clutch lever shaft (27) is connected to the operation case (27). 30), a finger clutch lever device (31) is rotatably supported on the finger clutch lever shaft (30), and one side of the finger lever arm (31a) of the finger clutch lever device (31) is supported. The finger clutch lever (31b) is fixed and a pin (31c) is fixedly provided on the other side, and the pin (31c) is inserted into the elongated hole (29a) of the tension arm (29), On the inner side of the finger clutch lever device (31) of the operation case (27), a rotation limiter (32) having a substantially L shape and having a protrusion (32a) on one side is pivotally supported. , With this rotation limiter (32) A restriction cable (32b) is provided and connected to the speed lever (15), and the protrusion (32a) of the rotation restricting tool (32) is in contact with the tension arm (29). The lever device (31) is configured to run or stop running through the tension arm (29), the clutch cable (24a), and the tension device (24) when the lever device (31) is turned on / off. The limiter (32) is configured to be able to be put in and out of the rotation trajectory of the finger clutch lever device (31). When the speed change lever (15) is operated to "reverse", the finger clutch lever device (31) is moved to " A tiller configured to return to the “cut” side.

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