JPS6118641Y2 - - Google Patents

Description

[Detailed explanation of the invention] The tillage hoe used in conventional impact tillers is
The hoe body and several pawl rods are made integrally, or the hoe body and several pawl rods are welded and fixed together. Therefore, since the impact of the hammer directly acts on the hoe bar, the impact may damage bent parts of the hoe bar, small scratches, or, if the bar is attached by welding, the edges of the welded parts. The problem was that it would always crack and cause the nail rod to break.

Therefore, in order to eliminate the above-mentioned defects, the present invention provides a vertical hole and a rotation prevention recess in the hoe body, and a flange attachment piece is provided at the base end of the pawl rod, and the base end attachment piece of the pawl rod is attached to the hoe. Insert it into the vertical hole of the main body, engage the collar with the anti-rotation recess of the hoe main body, insert an elastic material between the top of the hoe main body and the holding piece, insert it into the center hole of the holding piece, and tighten the claw rod. Attach the pawl rod to the hoe body using a bolt that threads into the screw hole, and always pull up and hold the pawl rod with an elastic material to prevent the attachment part of the pawl rod from loosening or rotating due to the vibration of the hammer blow. In addition, the impact acting on the pawl rod is alleviated by the downward movement of the pawl rod due to the elasticity of the elastic material, thereby preventing the pawl rod from breaking due to the impact of the hoe.
In addition, if the pawl rod becomes worn or breaks due to hitting an obstacle, the pawl rod can be easily and quickly replaced by bolt operation, which is beneficial for the work of impact tillers. It is related to hoeing.

To clarify the structure of one embodiment of the present invention shown in the drawings, a indicates a power mobile machine, 1 is a frame of the mobile machine a, and a front wheel 2 is attached to the front end of the lower part of the frame.
A reducer 3 is fixed in the middle and a transmission case 4 is fixed in the rear part, rear drive wheels 5 are attached to both sides of the axle supported at the lower end of the transmission case 4, and rear drive wheels 5 are attached to the upper front part. A control handle 6 is installed and a clutch lever 7 is attached to its first grip part. 8 is a prime mover mounted on the front part of the frame 1, and its driving shaft 9 is connected to the front part of the reducer 3 and power intake shafts 10 and 11 at the upper end of the transmission case 4 by belt transmission mechanisms 12 and 13, respectively. Clutch pulleys 14 and 15 are attached to the belts of the belt transmission mechanisms 12 and 13, respectively, and the support arm of the clutch pulley 14 and the clutch lever 7 are connected by a wire 16, and the clutch lever 7
When gripped, the clutch pulley 14 tensions the belt of the belt transmission mechanism 12, and although not shown, the power intake shaft 11 and the axle of the drive wheel 5 are connected by a chain transmission mechanism built in the transmission case 4. Link. 17 is a power take-off shaft supported at the rear of the reducer 3.

Reference numeral 18 denotes a pedestal provided on the front end of the frame 1, on which the lower end of the front gear housing 19 is pivotally supported by a pin 20, and the power intake shaft 21 of the gear housing 19 and the driving shaft 9 are connected to the belt transmission mechanism 22. Connect by.

23 is an operating crank supported on the rear part of the frame 1, the other side crankshaft and the power take-off shaft 17 of the reducer 3 are connected by a chain transmission mechanism 24 provided with a one-way transmission clutch; Install cam 25. Reference numeral 26 denotes a connecting rod that is supported on the frame 1 so as to be able to move forward and backward, and its front end is connected to the front gear housing 1.
A roller 27 connected to the upper part of the roller 9 and abutting the cam 25 is fitted to the rear end thereof. Reference numeral 28 denotes a double-sided link whose base end is pivotally supported by a support shaft 29 at the lower rear end of the frame 1, and the lower and upper ends of the mounting base 31 are pivoted between the pivot rod 30 horizontally suspended between the tips and the center of the operating crank 23. A traveling clutch lever 33 is attached to the shaft 32 pivotally supported on the intermediate portion in correspondence with the mounting base 31, and the arm of the shaft 32 and the support arm of the clutch pulley 15 are connected by a wire 34. When the running clutch lever 33 rotates forward and tilts, the clutch pulley 15 tensions the belt of the belt transmission mechanism 13.

b shows an impact tiller mounted on the rear surface of the mounting base 31, and 35 is a machine casing of the impact tiller b, and a rear gear casing 36 is installed at the rear of the upper end thereof. 37 is machine casing 35
The crankshaft installed in the upper part of the front gear housing 1
The power intake shaft 21 of No. 9 and the crankshaft 37 are connected to each other by a bevel gear mechanism built in the front gear case 19, a flexible shaft 38, and a bevel gear mechanism and a reduction gear mechanism built in the rear gear case 36 to form the crankshaft 37. Attach the crank 39 to the front end of. Reference numeral 40 denotes a hammer in the shape of a cylinder with a bottom, which is fitted into the intermediate portion of the machine casing 35 so as to be movable up and down.A piston 41 fitted into the hammer 40 so as to be movable up and down, and the crank 39 are connected by a rod 42. Reference numeral 43 denotes a detachable pin inserted into a vertical hole in the center of the bottom plate of the machine casing 35 and slidably fitted into a horizontal hole at the lower end of the machine casing 35.

44 is the hoe body of the tillage hoe c, which has a vertical hole 45 on both sides and in the center, and a wider recess at the lower end of the vertical hole 45 that prevents rotation in the front and back direction. A screw hole 47 is provided at both sides of the central vertical hole 45, and a mounting rod 49 having a vertically elongated recess 48 on the side surface is fixed to the center of the hoe body 44. Reference numeral 50 denotes a pawl rod, a mounting piece of appropriate length is formed at the upper base end thereof, a collar 51 is provided at the lower end of the attachment piece, and a screw hole 52 is provided at the center of the base end surface of the pawl rod 50 on both sides.
be installed. Therefore, the base end mounting pieces of both side pawl rods 50 are inserted into the lower part of both side vertical holes 45, and the base end attachment pieces of the central pawl rod 50 are inserted into the central vertical hole 45, respectively, and their collars 51 are secured to the rotation prevention recesses 46. be engaged with each other. Next, elastic members 53 are placed on both sides of the hoe body 44.
, insert the boss 55 of the holding piece 54 into the center hole of the elastic member 53 and the upper part of the side vertical hole 45, insert the bolt 56 into the center hole of the holding piece 54, and screw it into the screw hole 52. The shiso presser piece 54 and the end face of the side claw rod 50 are brought into contact and tightened and fixed. On the other hand, a recess 5 in the center of the upper surface of the holding piece 58 is provided with through holes 57 on both sides.
9, and their center holes are fitted into the central pawl rod 50, and an elastic material 61 is interposed between both sides of the presser piece 58 and the hoe body 44, and the bolt 62 is inserted.
It is inserted through the through hole 57 and the center hole of the elastic material 61 and screwed into the screw hole 47, and all the claw rods 50 are fitted to the hoe body 44 so as to be able to move up and down slightly to constitute a tillage hoe c, The mounting rod 49 is inserted into the vertical hole in the center of the bottom plate of the machine casing 35, and the vertically elongated recess 48 of the mounting rod 49 is fitted into the detachable pin 43, thereby fitting the tillage hoe c into the machine casing 35 so that it can move up and down. . 63 is the locus of the tip of the tillage hoe c.

Next, its effect will be explained. After putting the machine into the field and starting the operation of the prime mover 8, if the lever 7 is grasped and locked, the belt transmission mechanism 1 is connected to the clutch pulley 14 via the wire 16 from the lever 7.
2, the driving shaft 9 drives the operating crank 23 with the cam 25 in the direction of the arrow in FIG. 1 via the belt transmission mechanism 12, the speed reducer 3, and the chain transmission mechanism 24 with one-way transmission clutch.
Therefore, as shown in FIG. 1, from the state in which the operating crank 23 and the impact tiller b are lowered until the operating crank 23 reaches the top dead center, the operating crank 23 with the cam 25 moves in the direction of the arrow in FIG. As a result, the link 28 rotates forward using the shaft 30 as a fulcrum while the link 28 rotates toward the shaft 29.
The mount 31 with the impact tiller b rises by pivoting upward using the fulcrum as the fulcrum.

During its rise, the roller 27 opposes the lower part of the cam 25, the connecting rod 26 moves backward, and the gear housing 19 moves toward the pin 2.
The belt of the belt transmission mechanism 22 is loosened by rotating clockwise in FIG. The blow of the hoe c stops. On the other hand, when the hoe c comes out of the ground, the lever 33 is pressed by the mounting base 31, and the lever 33 rotates forward, and the clutch pulley 15 tensions the belt of the belt transmission mechanism 13 via the wire 34. Power is transmitted from the shaft 9 to the wheels 5 via the belt transmission mechanism 13, the power intake shaft 11, the transmission mechanism in the case 4, and the axle, and the machine moves forward. Thereafter, when the actuating crank 23 reaches near top dead center, the mounting base 31 separates from the lever 33, the lever 33 and the clutch pulley 15 return to their original positions, and the belt of the belt transmission mechanism 13 loosens, so that the power is removed from the drive shaft 9. The power transmission to the input shaft 11 is cut off and the wheel 5
stops rotating and the machine stops.

When the operating link 23 passes the top dead center, the one-way transmission clutch of the chain transmission mechanism 24 idles due to the weight of the attachment base 31 with the impact tiller b, etc., and the link 28 While pivoting downward about the support shaft 29, the mount 31 with the impact tiller b quickly falls, and the claw rod 50 of the hoe c pierces the soil to some extent. At about the same time, Cam 2
The roller 27 is pushed by the high point 5, and the connecting rod 26 moves forward, and the gear housing 19 rotates counterclockwise in FIG. Power is transmitted from the driving shaft 9 to the crankshaft 37 via the belt transmission mechanism 22, the power intake shaft 21, the gear mechanism in the gear housing 19, the flexible shaft 38, and the gear mechanism in the gear housing 36, and the power is transmitted to the crankshaft 37 through the crank 39 and the rod 42. The hammer 40 moves up and down while the air in the hammer 40 acts elastically through the piston 41, thereby strongly striking the mounting rod 49 of the hoe c and driving its claw rods 50 into the soil one after another. On the other hand, after the fall of the hoe c has stopped, the operating crank 23 is driven by the chain transmission mechanism 24, and the operating crank 23 continues to rotate in the direction of the arrow in FIG.
The mounting base 31 with the impact tiller b is successively lowered, and the claw rod 50 of the hoe c is driven into the soil.

Then, when the operating crank 23 passes the bottom dead center, the mounting base 31 with the impact tiller b rises while rotating forward about the shaft 30 as a fulcrum in the same way as described above, and thereafter, every rotation of the operating crank 23 sequentially The above action is repeated, the machine moves forward intermittently, and when the machine stops, the tip of the hoe c traces a trajectory 63, and the mounting base 31 with the impact tiller b slowly rises and rapidly falls. The claw rod 50 of the hoe c penetrates into the soil, digs up the soil, and plowing work is automatically and continuously performed.

At that time, as the attachment rod 49 of the hoe c is struck by the hammer 40, the attachment rod 49 is sequentially moved into the vertically elongated recess 48.
Due to its flexibility, the mounting base 31 with the impact tiller b is lowered while sliding into the bottom plate vertical hole of the machine casing 35 and driving the claw rod 50 into the soil. On the other hand, with the impact acting on the pawl rod 50 of the hoe c due to the impact of the hammer 40, the pawl rod 5 is moved by the elasticity of the elastic members 53 and 60.
0, the collar 51 engages with the anti-rotation recess 46 and moves downward without rotating, and the impact of the blow is absorbed by the elastic members 53 and 60 and softened while the hoe body 4 is lowered.
4, the collar 51 of the pawl rod 50 is pressed down and the pawl rod 50 is driven into the soil.

In the present invention, the tillage hoe for the impact tiller is constructed as described above, so that the pawl rod is always pulled up and held by the elastic material, and the attachment part of the pawl rod does not loosen due to the vibration of the hammer's impact for a long period of time. can withstand the use of
Moreover, since the flange of the pawl rod moves up and down while being engaged with the anti-rotation recess in the hoe body, a separate anti-rotation pin and other parts are unnecessary, and failures such as breakage of the pin may occur. The pawl rod is securely prevented from rotating and can be moved up and down.

Furthermore, when the hammer of the impact tiller hits the attachment rod of a tillage hoe to drive the claw rod of the hoe into the soil, the impact is transmitted directly from the hoe body with the attachment rod to the collar of the claw rod, causing the nail to strike. The rod can be driven into the soil with force and precision. At that time, due to the penetration created in the pawl rod by the impact and the elasticity of the elastic material of the attachment part, the proximal attachment piece of the pawl rod fits into the vertical hole of the hoe body, and the collar fits into the rotation prevention recess of the hoe body. As each slides, the pawl rods automatically move downward as appropriate, and the reaction force from the impact of the blow that acts on the pawl rods is absorbed by the elastic material and alleviated, as the pawl rods are driven into the soil one after another. , there is no strain on the pawl rod and the mounting bolt when the hoe is driven in, and the pawl rod and its mounting bolt are prevented from breaking, increasing the life of the hoe. Even if it breaks due to a collision, the broken pawl rod can be quickly and easily replaced by attaching and removing the bolt, so it is very convenient to work efficiently without any hindrance to the work. In addition, the structure is simple and can be manufactured easily and inexpensively, and the fixation is reliable and firm, and it operates smoothly.

[Brief explanation of the drawing]

Fig. 1 is a side view of a percussion tiller according to an embodiment of the present invention attached to a power moving machine, Fig. 2 is a rear view of the same, and Fig. 3 is a plowing hoe blow of the percussion tiller. Fig. 4 is a side view of the same tillage hoe, Fig. 5 is an enlarged rear view of the main part where the claw rod is attached,
FIG. 6 is an exploded rear view of the same tillage hoe, with one part cut away. 35... Machine case, 40... Hammer, 44... Hoe body, 45... Vertical hole, 46... Rotation stopper, 49
...Mounting rod, 50...Claw rod, 51...Tsuba, 52...
... Screw hole, 53 ... Elastic material, 54 ... Holding piece, 5
6...Bolt.

Claims (1)

[Scope of utility model registration request] The hoe body has several vertical holes at appropriate intervals in the left and right directions on the center of the hoe body, which has a mounting rod at the top center that is inserted into the vertical hole in the center of the bottom plate of the machine housing, which has a built-in hammer that moves up and down by power. A rotation prevention recess is provided at the lower end of the vertical hole in parallel, a mounting piece of appropriate length is formed at the upper base end of the claw rod, a collar is provided at the lower end of the mounting piece, and the center of the base end surface is is equipped with a screw hole, and inserts the proximal end attachment piece of the pawl rod from below into the vertical hole of the hoe body, engages the collar with the rotation prevention recess of the hoe body, and connects the top of the hoe body and the presser piece. A tillage hoe for an impact tiller, in which an elastic material is interposed between the holding pieces, and a bolt inserted into the center hole of the holding piece is screwed into a screw hole of the pawl rod.