JPH0137362Y2 - - Google Patents

Description

[Detailed description of the invention] In this type of conventional automatic deep cultivator, if the clutch in the transmission mechanism to the operating crank of the hoe is disengaged at any point, the crank and the hoe will stop operating, so the hoe will stop. The position is inconsistent.

On the other hand, the soil in tea gardens and orchards is hard, so if you stop the operation of the hoe during deep plowing work in tea gardens and orchards with an automatic deep tiller, the crank will turn off when the hoe penetrates into the soil. If it stops working, the next time you try to start the crank, the hoe won't come out of the soil, making it difficult to start the crank. Therefore, a considerably large driving force is required. Also, if you try to drive the hoe into the soil by operating the crank at this point, the upward reaction force of the crank will actually lift the aircraft, causing the aircraft to become unbalanced from side to side. There is a risk of it rolling over.

Furthermore, in order to bring the hoe out of the soil and stop it in the best position, it is necessary to operate the clutch lever many times to control the transmission of power to the crank. Operations such as lowering the rotation required a lot of time and effort, making it difficult to handle and inefficient.

Therefore, the purpose of this invention is to eliminate the above-mentioned defects.During deep plowing work, when the clutch in the transmission mechanism to the operating crank of the hoe is disengaged, the hoe always comes out of the soil and rises. Not only is it convenient for handling by stopping at a position near the dead center, but when the next time the hoe is operated, its own weight and inertia combine to push the hoe into the soil, ensuring that the machine always operates lightly and smoothly. This invention relates to a crank stop device for an automatic deep cultivator that is designed to improve safety and efficiency.

To explain the structure of one embodiment of the present invention shown in the drawings, a indicates a power moving machine, 1 is a frame of the moving machine a, and a front wheel 2 is rotatably supported at the center of the lower front end of the frame of the moving machine a. A transmission case 3 is fixed at the rear, rear drive wheels 5 are attached to both sides of an axle 4 supported at the lower end of the transmission case 3, and a control handle 6 is provided at the front of the upper part. Reference numeral 7 denotes a prime mover mounted on the front part of the frame 1, and its driving shaft 8 and the main shaft 9 at the top of the transmission case 3 are connected by a belt transmission mechanism 10. Although not shown, the main shaft 9 and the axle 4 are connected to the transmission case 3. 3 is linked by a built-in transmission mechanism.

b shows a clutch mechanism provided on one side of the main shaft 9, and 11 is an idler clutch ring fitted on the main shaft 9 so that it can only rotate freely, with a clutch pawl 12 on one side and a ratchet wheel 13 on the outside. Install it. Reference numeral 14 designates an operating clutch ring which is slidably fitted onto the main shaft 9 by a spline on one side of the free rotating clutch ring 11, and a clutch pawl 15 that engages with and disengages from the clutch pawl 12 is provided on the other side. Reference numeral 16 denotes a support shaft arranged parallel to the rear of the main shaft 9, and the tip of a locking pawl 17 whose base is rotatably fitted onto this support shaft faces above the ratchet wheel 13, and the end of the locking pawl 17 is placed on the 1st side of the intermediate portion upwardly on the 1st side. Slanted push-up guide piece 18
is provided protrudingly, and the locking pawl 17 is pressed downward by the spring 19 fitted with the support shaft 16. Reference numeral 20 denotes a clutch lever, the intermediate portion of which is supported by a vertical shaft 21 so as to be rotatable left and right and vertically movable, and is pressed upward by a spring 22 fitted to the vertical shaft 21; 23, operate the upper and lower bolts 24 of the clutch ring 14.
The protrusion 25 is fitted into the circumferential groove of the push-up guide piece 18, and a protrusion 25 is provided at the rear end so as to be vertically adjustable, facing the lower surface of the push-up guide piece 18.
Reference numeral 26 designates a locking plate for the clutch lever 20, on its lower edge, locking recesses A and B for engaging the clutch and disengaging the clutch are arranged side by side, and the elasticity of the spring 22 causes the clutch lever 20 to move into the locking recess. The front part of the clutch lever 20 is pressed against the other side by the spring 27, that is, in the direction of clutch disengagement. Reference numeral 28 denotes an intermediate shaft rotatably supported on the upper end 1 side of the transmission case 3, and this is connected to the idle clutch ring 11 by a chain transmission mechanism 29.

30 is a crank installed on the rear part of the frame 1 by a crankshaft 31, the intermediate shaft 28 and the first side crankshaft 31 are linked by a chain transmission mechanism 32, and the first side crankshaft 31 has a low place 33 on the outer periphery. Attach the provided cam 34.

c shows the clutch lever control mechanism provided in front of the cam 34, and 35 is its guide tube, which is connected to the frame 1.
Fixed to. 36 is a cam interlocking rod that is slidably inserted into the guide tube 35. Between the clip 37 attached to the front part of the cam interlocking rod 36 and the guide tube 35, a shock absorber 38 fitted to the cam interlocking rod 36 is inserted at the rear. A spring 40 fitted to the cam interlocking rod 36 is interposed between the attached clip 39 and the guide tube 35, and the elasticity of the spring 40 causes the roller 41 at the rear end of the cam interlocking rod 36 to engage the cam 34. Press and hold. 4
Reference numeral 2 denotes a hook whose base end is pivoted to the front end of the cam interlocking rod 36 by a pin 43 and protrudes to the other side.The hook 42 is pressed forward by a spring 44 so that the hook 42 is at right angles to the cam interlocking rod 36. It is provided so that it can rotate only backwards.

Reference numeral 45 denotes both-side links whose base ends are pivotally connected to the intermediate lower part of the frame 1 by pins 46, and the upper and lower ends of the mounting base 47 are pivotally connected to the distal ends of the crank 30 and the both-side links 45, respectively. Reference numeral 48 denotes a weight fixed to the mounting base 47, and a plowing hoe 49 is removably attached to the lower part of the weight. Reference numeral 50 indicates the locus of the tip of the tillage hoe 49, and 51 indicates a protective frame protruding from the rear of the intermediate portion of the frame 1, from which a sludge plate 52 is suspended so as to be movable back and forth.

In addition, the crank 30 is directed forward when the tillage hoe 49
When the roller 41 reaches the top dead center of its operation, the roller 41 enters into the low point 33 of the cam 34.

Next, its effect will be explained. When the machine is placed in the field and the prime mover 7 starts operating, power is transmitted from the driving shaft 8 of the prime mover 7 to the axle 4 via the belt transmission mechanism 10, the main shaft 9, and the transmission mechanism in the transmission case 3, and then to the drive wheels. 5 rotates and the machine moves forward. At this time, the operating clutch ring 14 rotates integrally with the main shaft 9.

Therefore, the clutch lever 20 is slightly lowered from the state shown in FIGS. 1 and 4, and rotated in the direction of the arrow in FIG. After the clutch lever 20 is released downward from the inside of the lock, the clutch lever 20 is moved to the 1st side against the elasticity of the spring 27 and rotated clockwise in FIG. 4 using the vertical shaft 21 as a fulcrum. 42, the hook 42 automatically releases the spring 4 by the pressing force of the clutch lever 20.
4, the clutch lever 20 continues to rotate rearward as shown by the arrow in FIG. When the hook 42 faces the recess of the locking plate 26, the hook 42 is restored to the state shown in FIG. corresponds to Therefore, when the clutch lever 20 is subsequently lifted and engaged in the recess A, the clutch lever 20 is held in the above state by the elasticity of the spring 22.

On the other hand, as the protrusion 25 of the clutch lever 20 slides on the lower surface of the guide piece 18 and moves to the other side, the guide piece 18 is pushed up, and the locking pawl 17 with the guide piece 18 is moved by the elastic force of the spring 19. The mounting ring 23 rotates counterclockwise in FIG. 5 using the support shaft 16 as a fulcrum against the
The bolt 24 pushes the operating clutch ring 14 to the other side and the clutch pawl 15 engages with the clutch pawl 12 of the idling clutch ring 11, so that the idling clutch ring 11, the transmission mechanism 29, and the intermediate Power is transmitted to the crankshaft 31 via the shaft 28 and the transmission mechanism 32, causing the crank 30 and the cam 34 to rotate in the direction of the arrow in FIG. Therefore, as the crank 30 rotates, the link 45 moves up and down using the pin 46 as a fulcrum, and the hoe 49 is integrated with the mounting base 47 with the weight 38, so that the tip of the hoe 49 moves in the direction of the arrow in FIG. It works by drawing 50. On the other hand, as the cam 34 rotates, the interlocking rod 36 with the hook 42
is moved backward by the elasticity of the spring 40 when the roller 41 faces the low point 33 of the cam 34,
When the low point 33 of the cam 34 passes the roller 41, it moves forward and backward against the elasticity of the spring 40.

Therefore, while the machine moves forward, the hoe 49 with the weight 48 pierces the soil one after another, digs up the soil and turns it over, and the plowing work is automatically performed continuously.

Further, when the hoe 49 moves upward and turns over the soil, the shaving plate 52 automatically moves back and forth as appropriate and comes into contact with the rear surface of the hoe 49, removing soil and bedding attached to the hoe 49. The foreign matter is forcibly removed by the dusting board 52.

Therefore, if you want to stop the operation of the hoe 49 when driving without working, transporting the machine by vehicle, or when making a U-turn during work, lower the clutch lever 20 slightly in the same way as above. If the hoe 49 is released downward from the press recess A and held, the low point 33 of the cam 34 will move when the hoe 49 rises to just before the top dead center and the crank 30 moves forward. is opposed to the roller 41, and the interlocking rod 36 with the hook 42 moves backward, and the hook 42 disengages from the clutch lever 20 rearwardly. After the spring 2 rotates counterclockwise in FIG. 4 and stops rotating when it hits the other side edge of the recess as shown by the solid line in
It is engaged and held in the recess RO pushed up by the elastic force of 2.

On the other hand, contrary to the above, the actuating clutch ring 14 is
As the clutch pawl 15 moves to the side and as shown in FIG. Rolling clutch ring 1
1 and the crank 30 connected thereto by transmission mechanisms 29 and 32 stop rotating, and the protrusion 25 also moves to the 1 side and detaches from the guide piece 18.
The locking pawl 17 with 8 rotates clockwise in FIG. 5 about the support shaft 16 by its own weight and the elasticity of the spring 19, and engages with the ratchet wheel 13 as shown in FIG. The retaining pawl 17 prevents the free rotating clutch ring 11 with the ratchet wheel 13 from rotating in the opposite direction, and the hoe 49 is stopped and held in the raised state.

In the present invention, the crank stop device for an automatic deep cultivator is constructed as described above, so that when the hoe is operated, the clutch lever is disengaged from the recess in the locking plate and is moved to one side against the elasticity of the spring. When the clutch lever touches the hook of the cam interlocking lever, the pressing force of the clutch lever is combined with the elasticity of the spring to automatically operate the hook, and the clutch lever engages the locking plate. When the clutch is engaged in the locking recess and fitted into the hook, the clutch in the transmission mechanism to the crank is engaged, and the crank and the hoe connected thereto begin to operate.

On the other hand, when driving without working, transporting the machine by vehicle, or making a U-turn during work, press down on the clutch lever slightly to release the clutch from the locking recess in the locking plate. If held apart, when the hoe rises and reaches near the top dead center, the lower part of the cam attached to the crankshaft of the operating crank of the hoe will oppose the roller of the cam interlocking rod with a hook, and the spring's elasticity will As a result, the cam interlocking rod with the hook moves backward and the hook disengages from the clutch lever, and at the same time, the clutch lever moves to the other side due to the elasticity of the spring and engages in the locking recess for clutch disengagement in the locking plate. However, the clutch in the transmission mechanism to the crank is disengaged, and the operation of the crank and the hoe stop, and the hoe stops in the above-mentioned raised position.

Therefore, when the clutch in the transmission mechanism to the operating crank of the hoe is released during work, the hoe always comes out of the soil and stops at a raised position near the top dead center, which is convenient for handling. Next, when the hoe is operated, its own weight and inertia combine to push the hoe into the soil, allowing the machine to operate smoothly and easily, improving work safety and efficiency, and the structure is simple. It has the advantage of being easy to manufacture at low cost.

[Brief explanation of the drawing]

Figures 1 and 2 are side views of an automatic deep cultivator according to an embodiment of the present invention. Figure 1 shows the hoe stuck into the soil during work, and Figure 2 shows the hoe stopped. Indicates each state. Figure 3 is the second
It is a top view of the state shown in the figure, with a part cut away. 4 is an enlarged plan view of a main part of the state shown in FIG. 2, FIG. 5 is a cross-sectional view taken along the line -- in FIG. 4, and FIG. 6 is a cross-sectional view taken along the line -- in FIG. DESCRIPTION OF SYMBOLS 1... Frame, 2... Front wheel, 3... Transmission case, 4... Axle, 5... Rear drive wheel, 7...
...Prime mover, 8...Driving shaft, 9...Main shaft, 11...
Swivel clutch ring, 12...Clutch pawl, 14...
Operating clutch ring, 15...Clutch pawl, 20...
Clutch lever, 21... Vertical shaft, 23... Mounting ring, 26... Locking plate, A... Locking recess for clutch engagement, B... Locking recess for clutch disengagement, 27...
Spring, 29...Transmission mechanism, 30...Crank, 31...Crankshaft, 32...Transmission mechanism, 3
3...Low place, 34...Cam, 36...Cam interlocking rod, 40...Spring, 41...Roller, 42
... Hook, 43 ... Pivot, 44 ... Spring, 49 ... Hoe.

Claims (1)

[Scope of utility model registration request] A front wheel and a transmission case are installed at the bottom of the frame on which the prime mover is mounted, and the main shaft is supported at the top of the transmission case, and the axle of the rear drive wheel is supported at the bottom end of the transmission case, thereby transmitting power to the driving shaft and main shaft of the prime mover, and to the main shaft and axle, respectively. In an automatic deep cultivator, which is connected by a mechanism and has a crank shaft mounted on the rear of the frame to drive and operate the hoe, the idling clutch ring can only rotate freely on the main shaft, and the operating clutch ring can only slide. Clutch pawls are provided on opposite surfaces of the clutch rings, which are freely attached to each other and engage and disengage from each other, and a cam with a low point is attached to the crankshaft, and the free rotation clutch rings and the crankshaft are connected by a transmission mechanism. The rear mounting ring of the clutch lever, whose intermediate portion is supported so as to be rotatable left and right around a vertical axis, is fitted into the actuating clutch ring, and the front part of the clutch lever is used as a locking plate for engaging and disengaging the clutch. A roller at the rear end of the cam interlocking rod is arranged so that it can engage alternately in the stop recess and is pressed toward the clutch disengagement side by a spring, and is provided on the frame so as to be movable back and forth opposite to the cam and is pressed backward by a spring. A hook that comes into contact with the cam and that fits into the clutch lever when the clutch lever engages in the locking recess for engaging the clutch is pivotally supported at the front end of the cam interlocking rod so that it can rotate only rearward. A crank stop device that is pressed forward by a spring.