JP4556370B2 - Walking type tillage device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a walking type tillage device having a vertical engine.
[0002]
[Prior art]
A vertical engine with an output shaft extending vertically is installed at the top of the transmission case. Power is transmitted from the bottom of the transmission case to the tiller shaft that is mounted horizontally and horizontally. A so-called axle tiller is known.
[0003]
In such an axle tiller, a fuel tank, an air cleaner, and a muffler are generally disposed around a central engine.
[0004]
[Problems to be solved by the invention]
By the way, when constructing such an axle tilling device, it is desirable to use a general-purpose engine for an inexpensive construction. For example, an engine used in a brush cutter or the like may have an air cleaner attached to one side in the left-right direction, an exhaust muffler attached to the other side left and right, and a fuel tank attached to one side of the front and back avoiding these. Many. Also, the height of the resistance rod is changed by tightening it.
[0005]
Since the exhaust port of this type of exhaust muffler is provided along the longitudinal direction of the engine output shaft, the upper surface of the fender that covers the top of the tillage shaft when this brush cutter engine is mounted directly on the axle tillage device as a vertical engine There is a risk that the fender may be burnt by directly ejecting hot exhaust gas.
[0006]
[Means for Solving the Problems]
The present invention is proposed in view of the above-mentioned problems, and therefore the following technical means have been taken. In other words, according to the first aspect of the present invention, the transmission case 3 is provided at the lower portion of the vertical engine 2, and the tilling shaft 13 is provided on the lower portion of the transmission case 3 in a horizontal and horizontal direction. In the walking type tilling device in which the top of the engine 2 is covered with a fender 70, a fuel tank 65 is provided at the front of the engine 2, and an air cleaner 64 is provided on the left and right sides of the engine 2 body. A muffler 60 is provided on the left and right sides, and an exhaust port of the muffler 60 is formed downward, and a guide 72 is provided on the fender 70 below the exhaust port to receive the exhaust gas and guide it sideways. This is a walking type tillage device.
[0007]
According to a second aspect of the present invention, there is provided the walking type tillage device according to the first aspect, wherein the guide 72 has a box shape, and only the upper side and the lateral side are opened. In this configuration, when the engine 2 is started, the exhaust gas is discharged downward, received by the guide 72 attached to the upper surface of the fender 70, and further discharged outward in the left-right direction.
[0008]
For this reason, the fender 70 is not scorched by high-temperature heat and hot air is not blown to the workers behind the machine body, and the tilling work is not hindered.
[0009]
Embodiment
Embodiments of the present invention will be described below based on the embodiments shown in the drawings. First, in terms of configuration, reference numeral 1 denotes a walking type mobile agricultural machine having a vertical engine 2 at the center of the machine body, and this engine 2 is provided in an upper part of a transmission case 3 that houses a transmission gear and the like to be described later. It is attached via a plurality of bolts 4 and 4. (The engine of this embodiment uses the engine of a brush cutter as it is.) The transmission case 3 is formed by combining two half case bodies 3a, 3a from the left and right, and the output transmission of the engine 2 The shaft 5 is inserted and supported in the vertical direction (vertical direction), and a shaft 7 with a worm gear 6 is screwed to the lower portion of the output transmission shaft 5. Since the output transmission shaft 5 and the shaft 7 are thus separated, the machining of each shaft is facilitated. The output transmission shaft 5 and the shaft 7 are integrally supported by a bearing 8 and a bush 9. Further, a worm wheel 11 is incorporated in the transmission case 3 and meshed with the worm gear 6 to transmit the rotational power on the engine 2 side to the worm wheel 11.
[0010]
In FIG. 2, reference numeral 12 denotes a clutch drum, which is integrally formed with the output transmission shaft 5, and a centrifugal clutch on the engine 2 side acts on the clutch drum 12 to transmit the rotational power of the engine 2 to the output transmission shaft 5. To the side. A through hole 15 through which the axle 13 is inserted is formed in the center of the worm wheel 11, and the axle 13 and the worm wheel 11 are configured to rotate integrally through a key 16. Both ends of the axle 13 protrude from the transmission case 3, and a cylindrical boss 20 having a tilling claw 18 attached thereto is fitted from the outside, and the cylindrical boss 20 is fixed to the axle 13 with a detachable pin 21. Therefore, a through hole 23 into which the pin 21 can be inserted is formed in the axle 13. The tilling claw 18 is detachably fixed to a single plate 24 fixed to the cylindrical boss 20 with bolts and nuts 25 and 26. The tilling claw 18 can change its inward and outward directions and its mounting posture according to the work content and purpose.
[0011]
In the figure, reference numeral 27 denotes a hair pin for preventing the pin 21 from being removed, 28 denotes an oil filling port formed in the transmission case 3, and 30 denotes an oil filling plug. Next, another configuration of the walking-type mobile agricultural machine will be described with reference to FIG. A machine frame 31 is detachably attached to two upper and lower portions of the rear portion of the transmission case 3 via fasteners 32 such as bolts and nuts, and a tail wheel 33 and a resistance rod 35 are supported on the machine frame 31. The machine frame 31 is formed by bending a sheet metal frame and is provided with an appropriate gap portion 36 in the left-right direction, and a lower portion of a handle column 37 made of a round pipe is fixed to the gap portion 36. The tail wheel 33 is attached to the lower end of an arm 39 that is bent in a U-shape when viewed from the back with the lower half widened to the left and right. The arm 39 can be rotated back and forth around the fulcrum pin 40. The height of the tail wheel 33 is adjusted by inserting a pin (not shown) from the side and matching one of the three through holes 43 formed in the machine frame 31 with one of the three through holes 43 formed in the machine frame 31.
[0012]
Further, a plurality of semi-circular cut grooves 44 are provided on the front side of the resistance bar 35, and the lock grooves 44 of the resistance bar 35 are locked to pins 45 provided on the machine frame 31, A spring 46 biases the resistance rod 35 forward. One end of the spring 46 around which the intermediate portion is wound around the pin 45 is locked in a hole 48 formed in the machine frame 31, and the other end of the spring 46 is locked on the upper back surface of the resistance bar 35. For this reason, the back middle part (A) of the resistance bar 35 is always in contact with the lower end of the rear end of the machine casing 31, and this state is always maintained during work.
[0013]
When changing the height of the resistance rod 35, the upper portion of the resistance rod 35 is squeezed and tilted backward while resisting the urging force of the spring 46 to release the engagement between the pin 45 and the engagement groove 44 and raise it. Or press down. The handle column 37 is divided into two parts in the vertical direction, and the upper column 37a is separable from the lower column 37b, and can swing back and forth around the fulcrum pin 49. The upper column 37a has a bifurcated upper portion and is formed in a Y shape when viewed from above. Two side plates 50 are fixed to the lower portion of the upper column 37a, and an arc-shaped elongated hole 51 is formed in the side plate 50. When the upper support post 37a is turned around the fulcrum pin 49, the attachment angle of the handle can be changed and adjusted in the range of the long hole 51.
[0014]
Since the fulcrum pin 49 can be pulled out horizontally, when packing and carrying this walking type mobile agricultural machine, it is possible to remove the upper column 37a and store it compactly in a wooden box. Although not shown, a lock knob is attached to the outside of the screw rod 52 that is loosely fitted in the long hole 51, and the lower column 37b and the upper column 37a are fixed by turning this knob. is there. In addition, a handle 54 for transporting a mobile agricultural machine extending forward is provided at the upper portion of the lower support column 37b, and the walking-type mobile agricultural machine 1 is carried by holding the handle 54. A clutch operating lever 55 for turning the centrifugal clutch of the engine 2 ON / OFF is provided on the left and right sides of the handle grip portion of the upper column 37a. The clutch is connected only when the clutch operating lever 55 is gripped, and the rotational power of the engine 2 is increased. Is transmitted to the axle 13 side which is a tilling shaft.
[0015]
Next, a mounting configuration of auxiliary devices around the vertical engine 2 will be described. A muffler 60 is provided on the left side of the engine 2 in the traveling direction, and a muffler cover 61 is attached to the outside thereof. The exhaust pipe 62 of the muffler 60 extends in the vertical direction, and the lower end thereof is cut out at an angle of 45 degrees so that the exhaust port 62a faces the laterally outer side.
[0016]
On the other hand, an air cleaner 64 is attached to the right side of the engine 2, and a fuel tank 65 is attached to the front portion of the engine 2. Reference numeral 66 denotes a fuel filler opening, and 67 is a cover covering the outside of the fuel tank 65. A recoil starter 69 for starting the engine 2 is provided at the center of the engine 2, and the engine 2 is started by pulling the knob 69 a of the recoil starter 69 rearward.
[0017]
A fender 70 is provided between the engine 2 and the axle 13 tillage part, and is configured so that soil and stones are not applied to the worker during the tillage work. The fender 70 comprises two front and rear sheet metals 70a and 70b, and is fixed to the engine 2 with bolts or the like with the upper part of the transmission case 3 sandwiched from the front and rear.
[0018]
A guide 72 made of a steel material having a box shape is formed on the upper surface of the fender 70 so that the upper and lateral outer sides are opened, and the guide 72 is configured to face the exhaust pipe 62 of the muffler 60. . Accordingly, the exhaust gas discharged from the exhaust pipe 62 of the muffler 60 is released downward at one end, and then is received by the front and rear and inner walls 72a, 72b, and 72c of the guide 72, and discharged toward the lateral outer side. .
[0019]
In addition, a bumper 73 having a U-shape in plan view is fixed to the front part of the fender 70 so that the walking-type mobile agricultural machine main body does not touch the trees or the concrete shore during the work to damage the engine 2 or the auxiliary machinery. Yes. In FIG. 1, reference numeral 74 denotes an ON / OFF switch for the engine 2, which is attached to the branching intersection of the upper support column 37a. When starting the engine 2, the switch 74 is turned to the ON position to pull the knob 69a of the recoil starter 69, and when the engine 2 is stopped when the work is finished, the switch 74 is turned to the OFF position.
[0020]
Next, the operation of the above example will be described. When starting the engine 2 and performing the tilling work, the tail wheel 33 is retracted upward and fixed, the resistance rod 35 is lowered, and the ON / OFF switch 74 is set to the ON position. In this state, the recoil starter 69 is pulled backward to start the engine 2 and the clutch operating lever 55 is gripped.
[0021]
Then, the rotational power of the engine 2 rotates the centrifugal clutch, the output transmission shaft 5 and the shaft 7 and rotates the axle 13 which is a tilling shaft through the worm gear 6 and the worm wheel 11 in order. When the axle 13 is rotated, the tilling claw 18 attached to the plate 24 integrated with the cylindrical boss 20 rotates to plow the soil. The tilling depth is adjusted by adjusting the force applied to the resistance bar 35.
[0022]
In addition, since the tilling claw 18 in this embodiment is attached to the plate 24 integrated with the cylindrical boss 20 so that the mounting direction can be freely changed, it can be freely and easily changed according to the purpose and contents of the work. is there. During the operation, exhaust gas is discharged downward from the tip of the exhaust pipe 62 of the muffler 60. In this embodiment, since the guide 72 having an opening on the upper side and the left side is fixed to the fender 70, the exhaust gas is discharged. There is no direct impact on the upper surface of the thin fender 70. Therefore, the upper surface of the fender 70 is not burned, and the exhaust gas is received by the guide 72 made of steel, and then quickly exhausted laterally outward. Therefore, there is no problem that gas is sprinkled on the worker behind. If the guide 72 is changed to a method of fixing with a bolt or the like, it is convenient that the guide 72 can be easily replaced even when it is deteriorated and damaged.
[0023]
In this embodiment, since the air cleaner 64 is installed on the right side opposite to the muffler 60 in the left-right direction, the exhaust air does not suck in hot air or dirty air, and the operating efficiency of the engine 2 is reduced. The durability of the filter member is not impaired.
[0024]
Further, a fuel tank 65 is provided at the front portion of the engine 2 and the fuel filler port 66 is configured in an obliquely upward posture, so that fuel fueling operation is easy. Moreover, since the fuel tank 65 itself is covered with the tank cover 67, the fuel tank 65 withstands breakage deformation and increases rigidity. Further, in this embodiment, the bumper 73 is provided in the front part of the fender 70 and the front part of the fuel tank 65 is protected by the bumper 73, so there is no possibility of damaging the fuel tank 65 during the work.
[0025]
In the above embodiment, the handle column 37 is formed of a round pipe. However, as shown in FIG. 7, it may be formed of a square pipe and the carrying handle 54 may be welded thereto. When welding the transport handle 54 to a round pipe, there was a need for a process of crushing the round pipe to ensure flatness, which could increase the cost. However, if a square pipe is used, such a problem is solved. It is what is done.
[0026]
【The invention's effect】
Since the present invention is configured as described above, the following technical effects can be obtained.
That is, the bottom of the vertical engine (2) provided with a transmission case (3), provided Jikuka tilling shaft (13) horizontally transversely to the lower portion of the transmission case (3), to the tilling shaft (13) a plurality of tilling claws (18 ...) fitted with, have covered the upper fender (70), suitable distance portion in the lateral direction is molded by bending a sheet metal frame to form a (36) wherein the transmission case (3 in walk-tiller for fixing the lower portion of the interval portion (handle struts made of round pipe 36) (37) of the machine frame provided on a rear portion (31) of the) front on the fuel tank of the engine (2) ( 65) , an air cleaner (64) is provided on the left and right sides of the engine (2) body, a muffler (60) is provided on the left and right sides, and an exhaust port of the muffler (60) is formed downward. , below the exhaust port fender (70) on The by fixing the guide (72) made of steel towards the upper and lateral outer has an opening has been box-shaped, said guide (72) is such that the face below the exhaust pipe of the muffler (60) (62) The machine frame (31) is provided with a resistance rod (35) having a plurality of locking grooves (44 ...) cut in a semicircular shape on the front side, and provided on the machine frame (31). The locking groove (44 ...) is locked to (45), and the resistance bar (35) is urged forward by a spring (46), whereby the rear intermediate portion (A) of the resistance bar (35) is moved. Since it is always in contact with the lower rear end of the machine frame (31), there is no risk of scorching the upper surface of the fender (70) with the hot air of the exhaust gas, and the exhaust gas is guided sideways. Because this gas is not applied to the worker, work comfortably It can be. Since the guide (72) has a box shape and only the upper and lateral outer sides are opened, the overall structure of the guide is simple and can be constructed at low cost.
[0027]
Further, the machine frame (31) is provided with a resistance rod (35) having a plurality of locking grooves (44 ...) cut in a semicircular shape on the front side, and a pin (45) provided on the machine frame (31). ) Is engaged with the retaining groove (44...) And the resistance rod (35) is urged forward by a spring (46) to thereby attach the rear intermediate portion (A) of the resistance rod (35) to the machine frame. (31) Since it is always in contact with the lower end of the rear end, when changing the height of the resistance rod (35), the upper portion of the resistance rod (35) is clamped to resist the biasing force of the spring (46). The pin (45) and the engagement groove (44) can be disengaged by tilting backward, and this can be pulled up or pushed down.
[Brief description of the drawings]
FIG. 1 is an overall side view of a walking-type mobile agricultural machine.
FIG. 2 is a front sectional view of a main part.
FIG. 3 is a side sectional view of a main part.
FIG. 4 is a plan view of the engine.
FIG. 5 is a plan view of a fender.
FIG. 6 is a plan view of a tail wheel portion.
FIG. 7 is a plan view of a main part with a part cut away.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Walking type agricultural machine 2 Engine 3 Transmission case 5 Output shaft 6 Worm gear 7 Shaft 11 Worm wheel 12 Clutch drum 13 Axle
31 Machine frame
35 Resistance Bar
44 Locking groove
45 pin 60 muffler 64 air cleaner 65 fuel tank 70 fender 72 guide 73 bumper

Claims (1)

The lower the transmission case of the vertical engine (2) (3) is provided, provided Jikuka the tilling shaft (13) horizontally sideways at the bottom of the transmission case (3), a plurality in the tilling shaft (13) number of mounting the tilling claws (18 ...), has covered the upper fender (70), suitable spacing portion shaped lateral direction by bending a sheet metal frame of the transmission case to form a (36) (3) In a walking type tilling device in which a lower portion of a handle column (37) made of a round pipe is fixed to the space portion (36) of a machine frame (31) provided at a rear portion, a fuel tank (65) is provided at a front portion of the engine (2 ). The air cleaner (64) is provided on the left and right sides of the engine (2) body, the muffler (60) is provided on the left and right other sides, the exhaust port of the muffler (60) is formed downward, and the exhaust mouth of the lower fender (70) on the upper surface How the lateral outer it is by fixing the guide (72) made of steel in which the opening has been box-shaped, configured such that the guide (72) faces the lower side of the exhaust pipe of the muffler (60) (62) The machine frame (31) includes a pin (45) provided with a resistance rod (35) provided with a plurality of locking grooves (44 ...) cut in a semicircular shape on the front side on the machine frame (31). ) Is engaged with the retaining groove (44...) And the resistance rod (35) is urged forward by a spring (46) to thereby attach the rear intermediate portion (A) of the resistance rod (35) to the machine frame. (31) A walking type tillage device characterized by being in a state of being in constant contact with a lower rear end portion .

Images