JP3662656B2 - Claw shaft attachment / detachment structure of rotary tiller - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is configured so that it can be easily performed when exchanging the claws together with the pawl shafts in a rotary tiller that is attached to the rear portion of the agricultural tractor and performs the tilling work.
[0002]
[Prior art]
Conventionally, various techniques are known for a mechanism for easily attaching and detaching the claw shaft of a rotary tiller.
For example, JP-B-64-8961, JP-B-55-39924, JP-B-53-52808, JP-B-55-152911, JP-B-53-103801, JP-B-55-51121 This is the technique described in Japanese Patent Publication No. 55-14081.
[0003]
[Problems to be solved by the invention]
However, in the prior art, it is necessary for the operator to lift the claw shaft, and the assistant must fix the claw shaft to the rotary tiller with a bolt. The operator can easily remove the claw shaft by himself / herself. I couldn't do it.
The present invention is configured so that the pawl shaft can be attached and detached mechanically by moving the rotary tiller up and down with a hydraulic mechanism while the operator is sitting on the seat of the agricultural tractor.
[0004]
[Means for Solving the Problems]
The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.
In Claim 1, it is a nail | claw axis | shaft attachment / detachment structure which enabled the removal | desorption of the tilling nail | claw axis | shaft 10 of a rotary tilling apparatus by raising and lowering a rotary tilling apparatus with a hydraulic mechanism, Comprising: Claw shaft side coupling flanges 4, 4 are arranged on both the left and right sides of the shaft 10, and projecting engagement pins 1 project from the same position of the left and right claw shaft side coupling flanges 4, 4 in the left-right symmetric direction. A lock pin 2 that can be moved in and out of the same position of the left and right claw shaft side coupling flanges 4 at a position opposite to the axis of the tilling claw shaft 10 of the claw shaft side coupling flange 4 projecting the coupling pin 1. And a drive shaft side coupling flange 5 is disposed at a position facing the claw shaft side coupling flange 4 on the claw drive shaft 11 side, and the projecting engagement pin 1 is disposed on the drive shaft side coupling flange 5. The locking notch recess 21 with which the locking pin 2 and the lock pin 2 correspond to each other. As the rotary tiller is lowered, the protruding engagement pin 1 and the locking notch recess 21 are engaged with each other, and then the protruding engagement pin 1 and the locking notch recess 21 are engaged. The claw shaft side coupling flange 4 and the drive shaft side coupling flange 5 are rotated so that the axes of the claw shaft side coupling flange 4 and the drive shaft side coupling flange 5 coincide with each other, and the lock pin 2 is moved from the claw shaft side coupling flange 4 to the drive shaft side coupling flange 5 side. The tilling claw shaft 10 and the claw driving shaft 11 are fixed automatically.
[0005]
In Claim 2, in the nail | claw axis | shaft attachment / detachment structure of the rotary tiller of Claim 1, in the state which incorporated the urging | biasing spring 12 and the release lever 3 in this lock pin 2 which can be moved in and out, and the lock pin 2 was retracted | retreated An L-shaped locking groove 37 for locking the release lever 3 is provided in the sliding guide 13 of the lock pin 2, and the release lever 3 is locked at a position behind the L-shaped locking groove 37 to drive the drive shaft. When the cores of the side coupling flange 5 and the claw shaft side coupling flange 4 approach each other, the drive shaft side coupling flange 5 has a release cam 38 that is released when the tip of the release lever 3 protruding from the lock pin 2 comes into contact therewith. It is a thing.
[0006]
According to a third aspect of the present invention, in the claw shaft detaching structure of the rotary tiller according to the first aspect, the drive shaft side coupling flange 5 is fastened to couple the claw shaft side coupling flange 4 and the drive shaft side coupling flange 5 to each other. Bolt screw holes 36 are formed at a plurality of locations.
[0007]
According to a fourth aspect of the present invention, in the claw shaft attaching / detaching structure of the rotary tiller according to the first aspect, a portion reaching the locking notch concave portion 21 is provided as a guide arc concave portion 34.
[0008]
In a fifth aspect of the present invention, in the claw shaft attachment / detachment structure of the rotary tiller according to the fourth aspect, an arc recess having substantially the same shape as the guide arc recess 34 is also provided on the side opposite to the guide arc recess 34 of the drive shaft side coupling flange 5. 35.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described.
FIG. 1 is a front view of a rotary tiller having a claw shaft attaching / detaching structure of a rotary tiller, and FIG. 2 shows a claw shaft attaching / detaching structure of a rotary tiller constituted by a projecting engagement pin 1, a lock pin 2 and a release lever 3. FIG. 3 is a front sectional view of the coupling state of the embodiment of FIG. 2, FIG. 4 is a side view showing a state during the coupling operation of the embodiment of FIG. 2, and FIG. 6 is a side sectional view of the drive shaft side coupling flange 5 on the claw drive shaft 11 side, and FIG. 7 is a claw shaft side on the side of the tilling claw shaft 10 of the embodiment of FIG. FIG. 8 is a rear view of the coupling flange 4 on the side of the tilling claw shaft 10, similarly.
[0010]
In FIG. 1, a rotary tiller provided with a claw shaft detaching structure of a rotary tiller will be described.
A PTO shaft protrudes from the rear part of the transmission case of the agricultural tractor, and the PTO is connected to a tillage input shaft 31 protruding from the bevel gear box 30. The rotation of the tillage input shaft 31 is converted into left-right rotation by the bevel gear in the bevel gear box 30, and power is transmitted to the chain case 20 fixed to the end of the main beam 33 by the power transmission shaft 32.
[0011]
The chain is transmitted to a sprocket 19 fixed to the lower claw drive shaft 11 by a chain in the chain case 20. The claw drive shaft 11 is driven by the sprocket 19, and the tilling claw shaft 10 connected to the sprocket 19 by the claw shaft side coupling flange 4 and the drive shaft side coupling flange 5 rotates. A claw insertion bracket 16 is planted on the tilling claw shaft 10, and a cultivation claw 17 is inserted and fixed to the claw insertion bracket 16.
[0012]
Usually, the nail drive shaft 11 and the tilling nail shaft 10 are rarely removed, but in recent years, all of the tilling nail shaft 10 and the tilling nail 17 are replaced as a set in order to switch between the upcut tillage and the downcut tillage. In addition, in order to switch between the normal speed tillage and the high speed speed tillage, the necessity of exchanging all of the tilling pawl shaft 10 and the tilling pawl 17 has emerged.
[0013]
Thus, when the tilling claw shaft 10 and the tilling claw 17 can be exchanged in a set state, the conventional coupling flange configuration cannot be replaced by one operator, and a plurality of assistants are required. It is.
That is, in order to match a heavy set of the tilling pawl shaft 10 and the tilling pawl 17 with the coupling flange projecting from the left and right pawl drive shafts 11 and fix them with the fastening bolts, the tilling pawl shaft 10 Therefore, it is necessary to lift the heavy tilling claw shaft 10 to a position where the claw driving shaft 11 and the claw driving shaft 11 are matched.
[0014]
In this embodiment, instead of lifting the set of the tilling claw shaft 10 and the tilling claw 17 and aligning it with the flange on the side of the claw driving shaft 11 held in the air as in the prior art, the tilling claw shaft 10 and the tilling claw 17 While the set of is kept on the ground, the claw drive shaft 11 and the flange portion of the rotary tiller are lowered on the set, so that the tiller claw shaft 10 is automatically adjusted according to the weight of the rotary tiller. And the claw drive shaft 11 are matched so that the coupling flanges are matched.
[0015]
An embodiment of the claw shaft detaching structure of the first rotary tiller shown in FIGS. 2 to 8 will be described.
In this configuration, the set of the claw drive shaft 11 and the drive shaft side coupling flange 5 is lowered from above together with the rotary tiller. The drive shaft side coupling flange 5 descending from above is provided with a locking notch recess 21 and a fitting hole 40 for the lock pin 2 as shown in FIG.
[0016]
As shown in FIGS. 5 and 6, the portion reaching the locking notch recess 21 is a guide arc recess 34, and the guide arc recess 34 is also provided on the side opposite to the guide arc recess 34 of the drive shaft side coupling flange 5. A circular arc recess 35 having substantially the same shape is formed. As a result, a weight that matches the reduced amount of the guide arc recess 34 can be obtained in the arc recess 35.
The drive shaft side coupling flange 5 is provided with four fastening bolt screw holes 36 for coupling the claw shaft side coupling flange 4 and the drive shaft side coupling flange 5 to each other. Reference numeral 14 denotes a rotation side wrinkle prevention plate which rotates at the inner diameter portion of the fixed side wrinkle prevention plate 15 fixed to the inner side surface of the chain case 20 to prevent the wrinkle from being caught.
[0017]
A lock pin 2 and a projecting engagement pin 1 are formed on the side of the claw shaft side coupling flange 4 that is coupled to the drive shaft side coupling flange 5. As shown in FIG. 2, the rotary tiller side is gradually lowered from above. At this time, the drive shaft side coupling flange 5 side is in the direction in which the portion of the locking notch recess 21 is located below. It is lowered after the posture is corrected. On the contrary, the tilling claw shaft 10 and the claw shaft side coupling flange 4 side are arranged so that the projecting engagement pin 1 is positioned upward.
[0018]
Further, when the claw drive shaft 11 and the drive shaft side coupling flange 5 are lowered, the lock pin 2 protrudes from the claw shaft side coupling flange 4 and thus interferes with the drive shaft side coupling flange 5. The lock pin 2 needs to be retracted. In order to retract the lock pin 2, the release lever 3 is pushed back against the biasing spring 12 so as not to protrude from the side surface of the claw shaft side coupling flange 4.
In this way, in a state where the lock pin 2 is pushed back against the biasing spring 12 by the release lever 3, at the position behind the L-shaped locking groove 37 provided in the sliding guide 13 of the lock pin 2, The release lever 3 is locked. In this way, by engaging the release lever 3 in the position behind the L-shaped locking groove, the lock pin 2 is moved backward from the end face of the claw shaft side coupling flange 4 against the biasing spring 12. It is retreating.
[0019]
As described above, when the tip of the lock pin 2 is retracted from the claw shaft side coupling flange 4, the claw shaft side coupling flange 4 and the drive shaft side coupling flange 5 are brought into close contact with each other, and the drive shaft side coupling flange 5 is lowered. It can be made.
Then, as shown in FIG. 4, when the protruding engagement pin 1 is inserted into the locking notch recess 21 from below and the rotary tiller is further lowered, the locking notch in which the claw drive shaft 11 and the protruding engagement pin 1 are inserted is inserted. Since the position of the recess 21 is eccentric, the claw shaft side coupling flange 4 rotates about the protruding engagement pin 1 so that the centers of the claw shaft side coupling flange 4 and the drive shaft side coupling flange 5 match. Thus, the claw shaft side coupling flange 4 rotates.
[0020]
Then, the core of the claw drive shaft 11 and the core of the tilling claw shaft 10 approach each other, and the tip of the release lever 3 protruding from the lock pin 2 passes through the cutout portion 37 on the outer periphery of the drive shaft side coupling flange 5. The release lever 3 comes into contact with the release cam 38 and is pushed. The release lever 3 is forcibly removed from the deepest position of the L-shaped locking groove 39 of the sliding guide 13 and attached. The lock pin 2 protrudes by the force of the spring 12.
With the release lever 3 approaching the release cam 38, the position of the lock pin 2 is rotated to a position just before the fitting hole 40, so that the release lever 3 is released from the L-shaped locking groove 39. When the insertion hole 40 reaches the position of the lock pin 2 in a state where the lock pin 2 can protrude by the biasing spring 12, the lock pin 2 naturally fits into the insertion hole 40.
[0021]
As a result, the projecting engagement pin 1 and the locking notch recess 21 are engaged with each other, and the lock pin 2 and the insertion hole 40 are engaged with each other. The position of the shaft side coupling flange 5 is in a state in which the shaft centers coincide.
In this state, the screw hole 36 of the drive shaft side coupling flange 5 and the bolt hole 49 of the claw shaft side coupling flange 4 are coincident with each other at four positions. The shaft side coupling flange 4 and the drive shaft side coupling flange 5 can be securely fixed.
[0022]
On the contrary, when the tilling claw shaft 10 is removed from the claw drive shaft 11, first, all the fastening bolts 18 are removed from the fastening state, and the release lever 3 is engaged with the inner part of the L-shaped locking groove 39. Until the rotary tiller is lifted up, the gap between the claw shaft side coupling flange 4 and the drive shaft side coupling flange 5 rotates around the locking portion of the projecting engagement pin 1 and the locking notch recess 21. As a result, the engagement between the projecting engagement pin 1 and the insertion hole 40 is also released, and finally the rotary tiller is lifted with the tillage claw shaft 10 left behind.
[0023]
FIG. 9 is an overhead view of a claw shaft attaching / detaching structure of a rotary tiller having a convex fitting portion A composed of a convex portion having a tapered shape and a wedge shape and a concave fitting portion B constituted by a concave portion of the same shape. 10 is a front view showing a coupling state constituted by the convex fitting portion A and the concave fitting portion B, and FIG. 11 shows the configuration of the driving shaft side coupling flange 6 on the claw driving shaft 11 side and the convex fitting portion A. FIG. 12 is a side view showing the shape of the nail shaft side coupling flange 7 on the side of the tilling claw shaft 10 and the concave fitting portion B, and FIG. 13 is a side view of the nail shaft side coupling flange 7 on the side of the tilling claw shaft 10. 14 is a front view showing the claw shaft side coupling flange 7 and the tapered groove 22 of the concave fitting portion B, and FIG. 15 is a driving shaft side coupling on the claw driving shaft 11 side. Drawing which shows the position of the flange 6, the convex fitting part A, and the pin insertion holes 25 and 26, FIG. 16 is the claw drive shaft 11 and the drive shaft side It is a front sectional view of the coupling flange 6.
[0024]
Next, with reference to FIG. 9 to FIG. 16, the claw shaft detaching structure of the rotary tiller will be described.
In this configuration, a convex fitting portion A is formed on the driving shaft side coupling flange 6 on the claw driving shaft 11 side, and a concave fitting portion B on the claw shaft side coupling flange 7 on the tilling claw shaft 10 side. Is configured. Both the convex fitting portion A and the concave fitting portion B are wedge-shaped, but one is a convex portion and the other is a concave portion, and both are configured so that males and females can be fitted perfectly.
[0025]
Further, the convex fitting portion A and the concave fitting portion B are not only configured in a wedge shape as a whole, but the end portions of the convex fitting portion A and the concave fitting portion B are tapered portions. 23.22. The tapered portions 23 and 22 are also configured to fit perfectly with the concave and convex portions.
Further, pin fitting holes 25 and 26 are provided in the convex fitting portion A on the drive shaft side coupling flange 6 side, and lock pins 8 and 9 are provided on the claw shaft side coupling flange 7 side. Yes.
[0026]
As shown in FIG. 15, the pin insertion holes 25 and 26 are eccentric to the left and right, and when the lock pin 9 inserted into the pin insertion hole 26 passes through the portion of the pin insertion hole 25, the pin insertion holes 25 and 26 are inserted first. It is configured so as not to end up.
Thus, by shifting the pin insertion holes 25 and 26 and shifting the lock pins 8 and 9, the drive shaft side coupling flange 6 and the claw shaft side coupling flange 7 are not in a state where the shaft centers are aligned. The lock pins 8 and 9 are configured to be fitted into the pin insertion holes 25 and 26.
[0027]
The lock pins 8 and 9 are always urged by the urging springs 41 and 42 in a direction protruding from the claw shaft side coupling flange 7 side to the drive shaft side coupling flange 6 side. The lock pins 8 and 9 are slidably supported, and slide brackets 29 and 30 holding the biasing springs 41 and 42 are fixed to the tilling claw shaft 10 side of the claw shaft side coupling flange 7.
The slide brackets 29 and 30 are provided with position determination notches 43 and 44 that can determine the position in two directions, that is, the direction determination pins 27 and 28 facing upward and the downward direction. The position determination notches 43 and 44 are opened at two positions where the notches facing upward are rotated 180 degrees in the rotation direction of the direction determination pins 27 and 28.
[0028]
In FIG. 9, two notches 43a and 43b constituting the position determining notch 43 are disclosed.
That is, the tips of the lock pins 8 and 9 have a shape obtained by obliquely cutting the tip of a round bar, and the inclined portion is a taper formed at the tip of the convex fitting portion A when the convex fitting portion A descends. The lock pins 8 and 9 are configured to retreat in the slide brackets 29 and 30 against the biasing springs 41 and 42 when the shaped portion 24 is pressed.
[0029]
However, when the direction determining pins 27 and 28 are fitted in the positions of the opposite cutouts 43b, the inclined surface faces downward, so that even if the drive shaft side coupling flange 6 is lowered from above, Since it contacts the upper surface of the lock pins 8 and 9, the lock pins 8 and 9 cannot be lowered.
[0030]
Therefore, when mounting the tilling claw shaft 10 to the rotary tilling device, the direction determining pin 27 is fitted into the notch 43a of the position determining notches 43 and 44, and the tilling claw shaft 10 is removed from the rotary tilling device. In this case, the direction determining pin 27 is fitted in the direction of the notch 43b of the position determining notch 43.
[0031]
The relationship between the lock pin 9, the direction determining pin 28, and the position determining notch 44 of the slide bracket 30 is the same, although the vertical direction is different.
Further, since the drive shaft side coupling flange 6 and the claw shaft side coupling flange 7 are configured symmetrically on the left and right, the left and right are the same.
[0032]
Further, when removing the tilling claw shaft 10 and the claw driving shaft 11 from the state where the convex fitting portion A and the concave fitting portion B are bitten, the direction determining pins 27 and 28 are changed in direction to rotate the rotary claw shaft 10 and the claw driving shaft 11. The raised fitting part A and the recessed fitting part B in the bitten state are not separated only by lifting the tillage device.
For such a case, the female screw body 31 is welded and fixed to the lower surface of the concave fitting portion B on the claw shaft side coupling flange 7 side, and a push bolt 32 is screwed to the female screw body 31. By applying the tip of the push bolt 32 to the convex fitting portion A, the separation is forcibly started.
[0033]
17 is a side view showing the drive shaft side coupling flange 6 having a configuration in which the upper and lower pin insertion holes 50 and 51 are linearly arranged on the center line, and FIG. 18 is a perspective view showing a configuration in which the lock pin 52 is a square pin. .
17 and 18, an improvement plan for a configuration in which the pin insertion holes 25 and 26 are arranged eccentrically on the left and right is illustrated. That is, in this configuration, the pin insertion holes 50 and 51 are arranged on a straight line passing through the shaft center with respect to the drive shaft side coupling flange 6.
As described above, when the pin insertion holes 50 and 51 are arranged on one straight line, the lower lock pin of the upper and lower lock pins is first inserted into the upper pin insertion hole 50, and more. There was a possibility that the convex fitting portion A would not descend in the concave fitting portion B.
[0034]
17 and 18, the lower pin insertion hole 51 in the pin insertion holes 50 and 51 is a square hole, and the lower lock pin 52 in the upper and lower lock pins is a square pin. By using the lock pin 52 as a square pin in this way, even if the lock pin 52 of the square pin passes through the portion of the pin insertion hole 50 configured as a round hole, the lock pin 52 is a pin insertion hole that is a round hole. Since it cannot fit in 50, it will pass through as it is. As a matter of course, the upper lock pin 8 is formed as a round pin as described above.
[0035]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
According to a first aspect of the present invention, there is provided a claw shaft attaching / detaching structure in which the rotary tilling device can be mechanically attached and detached by moving the rotary tilling device up and down by a hydraulic mechanism. Claw shaft side coupling flanges 4, 4 are arranged on both the left and right sides of the shaft 10, and projecting engagement pins 1 project from the same position of the left and right claw shaft side coupling flanges 4, 4 in the left-right symmetric direction. A lock pin 2 that can be moved in and out of the same position of the left and right claw shaft side coupling flanges 4 at a position opposite to the axis of the tilling claw shaft 10 of the claw shaft side coupling flange 4 projecting the coupling pin 1. And a drive shaft side coupling flange 5 is disposed at a position facing the claw shaft side coupling flange 4 on the claw drive shaft 11 side, and the projecting engagement pin 1 is disposed on the drive shaft side coupling flange 5. The locking notch recess 21 to be engaged with the lock pin 2 and the corresponding position of the lock pin 2 The projecting engagement pin 1 and the engaging notch recess 21 are engaged with each other as the rotary tiller is lowered, and then the engaging portion of the projecting engagement pin 1 and the engaging notch recess 21 is provided. The pawl shaft side coupling flange 4 and the drive shaft side coupling flange 5 are gradually rotated so that the shaft centers thereof coincide with each other, and the lock pin 2 moves from the claw shaft side coupling flange 4 to the drive shaft side coupling flange 5 side. Since the tilling nail shaft 10 and the nail drive shaft 11 are fixed so as to automatically protrude, the operator can easily attach and detach the tilling nail shaft 10 alone.
[0036]
According to the second aspect of the present invention, the urging spring 12 and the release lever 3 are incorporated in the lock pin 2 that can be moved in and out, and an L-shaped locking groove 37 that locks the release lever 3 in a state where the lock pin 2 is retracted. When the release lever 3 is locked at a position behind the L-shaped locking groove 37 provided on the sliding guide 13 of the lock pin 2 and the cores of the drive shaft side coupling flange 5 and the claw shaft side coupling flange 4 approach each other. Since the release cam 38 that is released by contact with the tip of the release lever 3 protruding from the lock pin 2 is configured on the drive shaft side coupling flange 5, the operator holds the release lever 3 on the release side. When the rotary tiller is lowered from above the tilling claw shaft 10, the driving shaft side coupling flange 5 on the claw driving shaft 11 side and the claw shaft side coupling flange 4 on the tilling claw shaft 10 side are automatically set. Connected by the projecting engagement pin 1 and the lock pin 2 Since the axis is consistent, easily with an operator it is one person, but they can desorption of tilling the nail shaft 10.
[0037]
According to the third aspect of the present invention, the drive shaft side coupling flange 5 is formed with a plurality of screw holes 36 for fastening bolts for coupling the claw shaft side coupling flange 4 and the drive shaft side coupling flange 5 to each other. Since the screw hole 36 of the drive shaft side coupling flange 5 and the bolt hole 49 of the claw shaft side coupling flange 4 coincide with each other at a plurality of positions, the fastening bolt 18 is inserted into this portion, and the claw shaft The side coupling flange 4 and the drive shaft side coupling flange 5 can be securely fixed.
[0038]
Since the portion reaching the locking notch recess 21 is provided as the guide arc recess 34 as in the fourth aspect, the protruding engagement pin 1 can be automatically guided to the locking notch recess 21 by the guide arc recess 34. is there.
[0039]
According to the fifth aspect of the present invention, an arc recess 35 having substantially the same shape as that of the guide arc recess 34 is formed on the side opposite to the guide arc recess 34 of the drive shaft side coupling flange 5. A weight that matches the decrease in weight can be obtained in the arc recess 35.
[Brief description of the drawings]
FIG. 1 is a front view of a rotary tiller having a claw shaft attaching / detaching structure of the rotary tiller.
FIG. 2 is an overhead view showing a claw shaft attaching / detaching structure of a rotary tiller constituted by a projecting engagement pin 1, a lock pin 2 and a release lever 3.
FIG. 3 is a front cross-sectional view of a combined state of another configuration.
4 is a side view showing a state during the joining operation of the configuration of FIG. 2; FIG.
FIG. 5 is a side view of the drive shaft side coupling flange 5 on the claw drive shaft 11 side.
FIG. 6 is a plan sectional view of the drive shaft side coupling flange 5 on the same claw drive shaft 11 side.
7 is a plan view of the claw shaft side coupling flange 4 on the side of the tilling claw shaft 10 having the configuration shown in FIG.
FIG. 8 is a rear view of the claw shaft side coupling flange 4 on the side of the tilling claw shaft 10 in the same manner.
FIG. 9 is an overhead view of a claw shaft attaching / detaching structure of a rotary tiller including a convex fitting portion A composed of convex portions that are tapered and wedge-shaped, and a concave fitting portion B that is configured by a concave portion of the same shape.
FIG. 10 is a front view showing a coupling state constituted by a convex fitting portion A and a concave fitting portion B.
11 is a side view showing a configuration of a drive shaft side coupling flange 6 on the claw drive shaft 11 side and a convex fitting portion A. FIG.
12 is a side view showing the shape of the nail shaft side coupling flange 7 on the side of the tilling nail shaft 10 and the concave fitting portion B. FIG.
FIG. 13 is a side view showing the claw shaft side coupling flange 7 and the concave fitting portion B on the side of the tilling claw shaft 10;
14 is a front view showing the claw shaft side coupling flange 7 and the tapered groove 22 of the concave fitting portion B. FIG.
15 is a view showing the positions of the drive shaft side coupling flange 6 on the claw drive shaft 11 side, the convex fitting portion A, and the pin insertion holes 25 and 26; FIG.
16 is a front cross-sectional view of the claw drive shaft 11 and the drive shaft side coupling flange 6. FIG.
FIG. 17 is a side view showing the drive shaft side coupling flange 6 having a configuration in which upper and lower pin insertion holes 50 and 51 are linearly arranged on the center line.
FIG. 18 is a perspective view showing a configuration in which the lock pin 52 is a square pin.
[Explanation of symbols]
A Convex fitting part B Concave fitting part 1 Protruding engagement pin 2 Lock pin 3 Release lever 4 Claw shaft side coupling flange 5 Drive shaft side coupling flange 6 Drive shaft side coupling flange 7 Claw shaft side coupling flange 8, 9 Lock Pin 10 Tillage claw shaft 11 Claw drive shaft

Claims (5)

A claw shaft detachment structure in which the cultivating claw shaft 10 of the rotary cultivating device can be mechanically detached by moving the rotary cultivating device up and down with a hydraulic mechanism,
Claw shaft side coupling flanges 4 and 4 are arranged on both the left and right sides of the tilling claw shaft 10, and projecting engagement pins 1 project from the same position of the left and right claw shaft side coupling flanges 4 and 4 in the left-right symmetric direction,
The claw shaft side coupling flange 4 provided with the projecting engagement pin 1 can be moved in and out of the same position of the left and right claw shaft side coupling flanges 4 at a position opposite to the axis of the tilling claw shaft 10. Lock pin 2 is projected,
A drive shaft side coupling flange 5 is disposed at a position facing the claw shaft side coupling flange 4 on the claw drive shaft 11 side, and the projecting engagement pin 1 is engaged with the drive shaft side coupling flange 5. A notch recess 21 and a fitting hole 40 at a corresponding position of the lock pin 2 are provided,
As the rotary plowing device descends, the protruding engaging pin 1 and the locking notch recess 21 engage with each other, and then the claw shaft gradually moves around the engaging portion of the protruding engaging pin 1 and the locking notch recess 21. The side coupling flange 4 and the drive shaft side coupling flange 5 are rotated so that the shaft centers thereof coincide with each other,
The rotary pinning device is characterized in that the lock pin 2 is automatically projected from the claw shaft side coupling flange 4 to the drive shaft side coupling flange 5 to fix the tilling claw shaft 10 and the claw drive shaft 11. Nail shaft attachment / detachment structure.   2. A claw shaft attaching / detaching structure of a rotary tiller according to claim 1, wherein a biasing spring 12 and a release lever 3 are incorporated in the lock pin 2 that can be moved in and out, and the release lever 3 is engaged with the lock pin 2 retracted. An L-shaped locking groove 37 to be stopped is provided in the sliding guide 13 of the lock pin 2, and the release lever 3 is locked at a position behind the L-shaped locking groove 37, and the drive shaft side coupling flange 5 and the claw A rotary cam characterized in that the drive shaft side coupling flange 5 has a release cam 38 that is released when the tip of the release lever 3 protruding from the lock pin 2 comes into contact with the shaft of the shaft side connection flange 4. Claw shaft attachment / detachment structure for tillage equipment.   2. A claw shaft attachment / detachment structure for a rotary tiller according to claim 1, wherein the drive shaft side coupling flange 5 is connected to the claw shaft side coupling flange 4 and the drive shaft side coupling flange 5 with a screw bolt screw hole 36. Is a claw shaft detaching structure of a rotary tiller characterized by being drilled at a plurality of locations.   The claw shaft attaching / detaching structure of the rotary tilling device according to claim 1, wherein a portion reaching the locking notch recessed portion 21 is provided as a guide arc recessed portion 34.   5. The claw shaft attaching / detaching structure of the rotary tiller according to claim 4, wherein an arc recess 35 having substantially the same shape as the guide arc recess 34 is formed on the opposite side of the guide arc recess 34 of the drive shaft side coupling flange 5. Claw shaft attachment / detachment structure of the rotary tiller characterized by the feature.

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