JP2665580B2 - Tiller - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a tiller, more specifically,
TECHNICAL FIELD The present invention relates to a tiller having a resistance rod for obtaining resistance by digging into soil or a tilling depth adjusting rod for adjusting tilling depth. 2. Description of the Related Art Generally, a cultivator is constructed by installing a rotary capable of switching between normal rotation and reverse rotation in a machine body, rotating the rotary normally or reversely, and allowing an operator to walk together with a handle. , The soil is stirred by the claws of the rotary to cultivate the field. [0003] However, the above-mentioned conventional
Cultivator was hard in the field during the normal rotation of the rotary
When the rocks are buried, the rotation of the rotary
A place where the aircraft suddenly moves due to momentary forward force.
A so-called dashing phenomenon occurs and it is necessary to prevent it.
It is common practice to mount a resistance rod on the rotary
ing. In addition, in order to keep the plowing depth of the rotary constant
It is common practice to attach a working depth adjustment rod to the rotary part.
It However, these resistance rods installed in the rotary
The plowing depth adjusting rod is conventionally separated on the upper part of the rotary cover.
Since it was supported by a frame provided on the way,
Earth pressure is applied to the resistance rod or the working depth adjustment rod from the front and back or the left and right directions.
If so, a large bending moment is applied to the resistance rod or the working depth adjustment rod.
If the resistance rod or the working depth adjustment rod is deformed or damaged,
There is a possibility to say, resistance rod or plowing depth adjustment rod, and this
The strength of the supporting frame support is sufficient to withstand this
There was a problem that it had to be solid. Conventionally, a resistance rod or a plowing depth adjusting rod is
Extend further behind the rear cover behind the tariff cover
Since it was provided, the operator's foot was a resistance rod during the plowing work.
Or, there is a possibility that you may get caught in the working depth adjustment rod and fall.
Was. The present invention is intended to solve the above-mentioned problems, and as shown in FIG. 2 , the traveling wheels and the rotary are mounted on the machine body, and The
The rotary has the same clearance as the rotary.
A substantially semi-circular rotary cover that covers the upper side, and the rotary cover.
Install a vertically rotatable rear cover at the rear end of the cover.
In the tiller to be worn, the
Has a vertical sliding groove above the rear of the case
Install the support part between the upper rotary cover and
Also, in the sliding groove of the support part, a resistance rod, a working depth adjusting rod,
Either the resistance rod or the working depth adjustment rod
Insert the cover with the cover penetrating upward and
An anti-stick or a working-depth adjusting rod is installed at the top of the rotary cover.
The vertical position is adjustable and fixed . Based on the above construction, the resistance rod and the working depth adjusting rod
Use the rotary cover and rear cover
It will be installed in the tilling space surrounded by the cover,
Resistance rods or working depth adjustment rods are especially
It does not stick out backwards. Also, resistance rod or plowing depth adjustment
The knot bar is on the rear of the mission case where the rotary is mounted.
Of the support section that is provided between the user and the rotary cover.
Supported by vertical sliding grooves,
The depth adjusting rod is supported by this vertical support,
The rattling of the direction is restricted. In addition, resistance rod or plowing depth adjustment
Resistance even when reaction force in the front-back and left-right directions acts on the knot bar
The rod or the working depth adjusting rod shall have its lower end supported by a support.
Therefore, a large bending moment is created on the resistance rod or the working depth adjustment rod.
Since it is not used, resistance rods or plowing depth adjusting rods have a particularly large diameter.
No need. Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 9, the tiller 1 includes a mission case 2, an engine 3, a traveling wheel 5, a rotary 6, a handle 7, a resistance rod 9, and a tilling depth adjusting rod 10 which constitute a body frame. The mission case 2 is made up of a large-sized member made up of a mating case formed by pressing, an engine frame 11 for mounting the engine 3 is fixed in front of the mission case, and a rotary locus 6A of the rotary 6 has an upper portion above the engine frame 11. A rotary cover 12 having a substantially semi-arcuate shape is formed so as to cover the rotary 6 with a gap between the rotary cover 6 and the rotary cover 12, and a rear cover 12a is vertically rotatable behind the rotary cover 12. It is placed in. Further, a handle 7 is attached so as to extend obliquely rearward, and traveling wheels 5 and a rotary 6 are attached to the tip end portions of the octagonal case portion, respectively. Further, from the output pulley of the engine 3 to the input shaft 13 of the mission case 2 (see FIG. 5,
(See FIG. 6) A belt is wound around a pulley fixed to a tension pulley which constitutes a main clutch so that the belt can be tensioned and loosened freely, and the belt and the pulley are case 1
Covered by 5. Further, a gear shift lever 16 extends from the upper portion of the mission case 2 along the upper side of the handle 7, and the gear shift lever 16 is attached to a fuel tank 17 above the engine 3 and the guide plate 19 mounted across the mission case 2. Guide groove 20 (see FIGS. 7 and 8)
Is being guided to. The guide groove 2 of the guide plate 19
As shown in FIG. 7 or FIG. 8, 0 is from a traveling gear position having a forward first speed position F1, a forward second speed position F2, a neutral position N, a reverse position R, and a work neutral position N ′ in the lateral (left and right) direction. Further, the vertical (vertical) direction includes a rotary rotation direction switching stage having a forward rotation position S, a neutral position NR, and a reverse rotation position C. The gear shift lever 16 is shown in FIGS.
As shown in FIG. 5, the base end portion thereof is U-shaped, and the U-shaped portion 16a is rotatable by the bolt pin 21 in the vertical direction and integrally linked in the left-right direction with the shifter interlocking shaft 22.
Are linked to. Further, the shifter interlocking shaft 22 is rotatably supported by a collar 23 fixed to the transmission case 2, and a shift arm 25 is provided in the case 2.
Is welded. Further, a transmission shift shaft 26 is arranged on the left and right side surfaces of the mission case 2, and both ends of the shift shaft 26 are held by collars 27, 27 and fixed by bolts 29, 29. A shift fork 30 is slidably fitted into the shift shaft 26. The shift fork 30 is biased to a predetermined position by a click stop mechanism between the shift fork 30 and the shift fork 30 and is connected to the speed change arm 25 and spline-coupled to the input shaft 13 so as to be slidable only. It is engaged with the running shifter gear 31. On the other hand, a U-shaped interlocking arm 32 is rotatably supported by the collars 27, 27 holding the speed-change shift shaft 26, and the interlocking arm 32 has a long hole 32a extending in the lateral direction. The shift lever 16 is formed and penetrates the elongated hole 32a. As a result, the interlocking arm 32 rotates about the collar 27 by the vertical movement of the speed change arm 16,
The lateral movement of the lever 16 is absorbed by the long hole 32a and is not transmitted to the interlocking arm 32. The collar 33 fixed to the mission case 2 includes a rotary shifter interlocking shaft 3
5 is rotatably supported, a plate 36 is fixed to the interlocking shaft 35 outside the case, and the plate 36
A pin 37 is fixed to the tip of the pipe 37, and the pin 37 is connected to the rod 39 having one end connected to the interlocking arm 32 by the pipe 40.
Are connected via. A rotary speed change arm 41 is welded to the inner portion of the case of the interlocking shaft 35. On the other hand, as shown in FIG. 2, sliding grooves 2a and 2b are formed in the rear part of the transmission case 2 by press working in two mating cases, and these sliding grooves 2a and 2b are formed. The resistance rod 9 and the working depth adjusting rod 10 are attached to the rear end of the mission case 2 and the rotary cover 12.
Penetrate the rotary cover 12 into the gap at the rear end and move up and down.
It is slidably inserted in any direction. Moreover, under the resistance rod 9
The end extends in the front-back direction from the lower end of the rotation trajectory 6A of the rotary 6.
An upper position H and a lower position R on the horizontal extension line L
The resistance rod 9 is movably inserted so as to face.
In addition, a bracket 2c is provided above the rear of the mission case 2.
And a bell crank-shaped link 42 is supported on the bracket 2c so as to be rotatable in the machine front-back direction. Further, as shown in FIGS. 1 to 3, one end of the link 42 is formed in a U shape, and a long hole 42a is formed in the U shape portion, and a hole is formed at the other end. 42b
Are drilled. On the other hand, the resistance rod 9 has a resistance plate 43 fixed to the front end of the body so as to be inclined downward in the front of the machine body, and the other end thereof is clamped by the U-shaped portion of the link 42 and the long hole 42a of the link 42. Also, the pin 45 is penetrated, and the link 42 is rotated to slide in the vertical direction of the machine body. Further, the link 42 has a key portion 39a formed at the other end of the rod 39 in the hole 42b.
Is rotatably inserted, and therefore is pulled by the rod 39 to rotate to rotate the resistance rod 9 to rotate the rotary 6.
Above the virtual extension line L extending from the lower end of the trajectory 6A in the front-rear direction
It slides in the vertical direction to move to two positions, a side position H and a lower position R. In the gap between the rear end of the transmission case 2 and the rear end of the rotary cover 12, the rotary 6 is also used.
The plowing depth adjusting rod 10 disposed in the rotation locus 6A of the above is provided with a large number of holes 10a along its longitudinal direction, a sled member 46 is fixed at one end, and the rotary cover 12 is provided at the other end. Protruding upward from. Further, the cover 12
A U-shaped bracket 47 is installed at a position facing the upper working depth adjusting rod 10, and a pin 49 having one end bent into a hook shape is fitted and inserted into the bracket 47. The pin-shaped one end of the pin 49 has stepped stop portions 47a, 47 formed at one end of the bracket 47.
It is adapted to be engaged with each of b. Therefore, the pin 49 is pulled against the spring 50 in the direction opposite to the working depth adjusting rod 10 to engage with the stopper portion 47a, and the working depth adjusting rod 10 is slid upward or downward to form a hole at an appropriate position. 1
0a is inserted into the other end of the pin 49 removed from the stopper 47a to fix the working depth adjusting rod 10, that is, the sled member 46 at an appropriate position to set the working depth. Further, as shown in FIGS. 4 to 6, a rotary shift shaft 51 is disposed so as to be adjacent to the shift shift shaft 26 and extend over both side surfaces of the transmission case 2.
Further, a shift fork 52 is slidably fitted on the shift shaft 51. The shift fork 52 is positioned and biased to a predetermined position by a click stop mechanism between the shift fork 52 and the shift arm 51, and
, And is engaged with a rotary shifter gear 53 that is slidably connected to the input shaft 13 by a spline. Incidentally, in FIG. 5, the shifter gear 3 for shifting is shown.
1 is engaged with the gear 55 and is in the first forward speed F1, is engaged with the gear 57 which is always meshed with the gear 56 and is engaged with the second forward speed F2, and is engaged with the gear 60 which is constantly meshed with the gear 59. Reverse R
Further, the rotary shifter gear 53 engages with the gear 61 to rotate in the forward direction S, and the gear 63 always meshes with the gear 62.
And reverse C is obtained. Further, the rotation of the traveling power transmission system is transmitted to the traveling wheels 5 via a chain and a differential gear, and the rotation of the rotary transmission system is transmitted to the rotary 6 via the chain. Further, as shown in FIGS. 4 and 6, the handle 7 is mounted so as to sandwich the transmission case 2 by a bracket 65 having a U-shape, and the bracket 6 is attached.
By attaching 5, the rotary shift shaft 51 is prevented from coming off. Since the present embodiment is constructed as described above, the rotation of the engine 3 is transmitted to the input shaft 11 at the transmission case 2 portion via the belt inside the case 15. When the operator moves the speed change lever 16 laterally (left and right) along the guide groove 20 of the guide plate 19, the left and right movements of the speed change lever 16 are transferred to the shift fork 30 via the shifter interlocking shaft 22 and the speed change arm 25. The fork 30 is transmitted, slides along the shift shaft 26, and is positioned at an appropriate position corresponding to the display of the guide plate. For example, when the speed change lever 16 is moved from the neutral position N to the second forward speed position F2, the fork 30 engages the traveling speed change shifter gear 31 with the gear 57 to drive the tiller 1 at a high speed so as to adapt to non-work traveling. When moving to the reverse position R, the shifter gear 31 engages with the gear 60 and moves backward. At this time, depending on the left / right movement of the speed change lever 16, the lever 16 may move the long hole 3
The interlocking arm 32 is not affected at all by simply sliding inside the 2a, and is kept at the rotary stop position NR. Then, with the speed change lever 16 positioned at the work neutral position N on the guide plate 19,
Is operated vertically (up and down) along the guide groove 20,
The interlocking arm 32 rotates up and down around the shift shaft 26. Then, the rotary shifter interlocking shaft 35 is rotated via the rod 39 and the plate 36, and the transmission arm 4 is further rotated.
The shift fork 52 is slid along the shift shaft 51 via 1 and is positioned at an appropriate position corresponding to the display of the guide plate. For example, change the speed change lever 16 to the neutral position NR.
When the shift fork 52 moves from the forward position S to the normal rotation position S, the shift fork 52 engages the shifter gear 53 with the gear 61 to transmit the rotation in the same direction as the forward direction to the rotary 6. At this time, the shift lever 16
The arm 32 is rotated toward the lower side of the machine body in conjunction with the operation of, and the arm 39 moves the rod 39 rearward of the machine body, so that the rod 39 directs the link 42 rearward of the machine body at the key portion 39a. Rotate. In this state, the link 42 slides the pin 45 along the elongated hole 42a, within the gap between the rear end of the transmission case 2 and the rear end of the rotary cover 12, and the rotation locus 6A of the rotary 6 described above.
An upper position H on a virtual extension line L extending from the lower end in the front-rear direction
Slides up and down to reach two positions, the lower position and the lower position R
The resistance rod 9 freely penetrating the rotary cover 12 moves the resistance plate 43 together with the resistance rod 9 toward the lower position R ,
As a result, the resistance rod 43 bites deeply into the soil and receives a large resistance due to the traveling of the machine body, absorbs the reaction force from the field by the rotary 6 and prevents dashing .
The rotary load of the rotary 6 can be reduced. When the shifter gear 53 moves to the reverse rotation position C, the shifter gear 53 engages with the gear 63 to transmit the rotation in the reverse direction to the forward direction to the rotary 6. In this state, the arm 32 is rotated toward the front of the machine body as opposed to the normal rotation of the rotary 6, whereby the rod 39 rotates the link 42 in the same direction as the arm 32 and the resistance rod 9 and the resistance plate. 43 is a rotary locus 6A lower end of the rotary 6
To an upper position H on a virtual extension line L extending in the front-rear direction . Therefore, in this state, the resistance plate 43 does not dig deep into the soil, and therefore does not receive a large resistance from the field. Further, any one of the resistance rod 9 and the working depth adjusting rod 10 or the resistance rod 9 or the working depth adjusting rod 10 is in the gap between the rear end portion of the mission case 2 and the rear end portion of the rotary cover 12, and the rotary 6 Since it is arranged within the rotation locus 6A , it is possible to effectively utilize the limited space space within the rotation locus 6A and arrange it close to the rear end of the mission case 2 to form a compact body. Then, with the shift lever 16 moved up or down, the lever 16 is moved laterally along the guide groove 20 to the forward first speed position F1. Then
Similarly to the above, the shifter gear 31 is moved to the gear 55 via the shifter interlocking shaft 22, the speed change arm 25 and the shift fork 30.
Shifts so as to engage with the wheel 5, and the low speed rotation suitable for the work is transmitted to the wheel 5. As a result, the tiller 1 advances while the rotary 6 rotates in the forward rotation or the reverse rotation, and the tillage operation is performed. In a hard field, the resistance rod 9 determines the working depth, so the working depth adjusting rod 10 having the sled member 46 is used.
However, in a soft field (field upland), the resistance rod 9 may not be able to support the rotary 6 in some cases. In this case, the pin 49 is attached to the hole 10 of the working depth adjusting rod 10.
After pulling out from a, the plowing depth adjusting rod 10 is manually adjusted, further fixed at an appropriate position, and the sled member 46 supports the rotary 6 to perform plowing work. As described above, the present invention provides a resistance rod.
And plowing depth adjusting rod, or resistance rod or plowing depth adjusting rod
With one of them in the state of penetrating the rotary cover upward,
Lower tillage space surrounded by the rear cover and rear cover
Since it is provided in the space, resistance rods or working depth adjustment rods
Especially, it may come out further rearward from the rear part of the rear cover.
Therefore, the operator's foot may
Can be prevented from getting caught on the working depth adjustment rod,
You can do the work. Also, resistance rods or working depth adjustment rods
Is above the rear of the mission case where the rotary is installed.
Especially the upper part of the support part provided between the rotary cover and
Insert it into the downward sliding groove to
Since the lower end of the adjusting rod is supported as much as possible,
Rattling of resistance rod or tillage depth adjusting rod
It is well regulated by the support part, and front and back and left and right
Even when a reaction force in the direction is applied, the resistance rod or the working depth adjustment rod
Bending moment is reduced by the support that supports the lower end.
It is possible to reduce the number of resistance rods or plowing depth adjusting rods to a particularly large diameter.
There is no need to secure strength without
It has a small diameter to prevent plowing resistance or adhesion of mud as much as possible.
be able to.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a connecting structure of an operating lever and a resistance rod of a tiller according to the present invention. FIG. 2 is a side view of FIG. FIG. 3 is a perspective view showing a resistance rod protruding above a rotary cover. FIG. 4 is a side view of the shift operating device. 5 is a cross-sectional view taken along the line VV of FIG. 6 is a cross-sectional view taken along the line WW of FIG. FIG. 7 is a front view showing a guide groove of a guide plate. FIG. 8 is a front view showing a guide groove partly modified from FIG. FIG. 9 is an overall side view showing a tiller to which the present invention is applied. [Explanation of Codes] 1 Tiller 6 Rotary 6A Rotational locus of rotary 6 9 Resistance rod 10 Plowing depth adjusting rod 12 Rotary cover 12a Rear cover 16 Operation lever (shift lever) L Rotational locus 6A of rotary 6
Below the upper position R the resistance bar 9 of the virtual extension line H resistance rods 9 extending

   ─────────────────────────────────────────────────── ─── Continued front page    (56) Bibliographic Reference Showa 53-37608 (JP, U)                 Actual public Sho 60-1524 (JP, Y2)                 Actual public Sho-45-10805 (JP, Y1)

Claims (1)

(57) [Claims] Install traveling wheels (5) and rotary (6) on the machine
Along with the rotary (6), the clearance between the rotary and
A substantially semi-circular rotary cover that covers the upper part of the rotary cover at equal intervals.
-(12) and the rotary cover (12) at the rear end
Plowing with a rear cover (12a) that can rotate downward
Install the rotary (6) in the poop (1)
Sliding vertically above the rear of the mission case (2)
The support portion having the grooves (2a) and (2b) is attached to the upper rotary.
It is provided between the cover (12) and the cover (12).
In the sliding grooves (2a) and (2b), the resistance rod (9) and the working depth are set.
Adjusting rod (10), resistance rod (9) or working depth adjusting rod
Install the rotary cover (12) on either side of (10).
The resistance rod (9) is inserted with the resistance rod (9) penetrating upward.
Alternatively, the working depth adjusting rod (10) is provided on the rotary cover (12).
The upper part can be vertically adjusted and fixed.
A tiller characterized by being present.