JPS6394903A - Plowing machine - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Industrial Application Field The present invention relates to a tiller, and particularly to a small tiller having an integrated rotary. Regarding tillers.

(b) Prior art In general, a tiller has a rotary that can be switched between normal rotation and reverse rotation installed in the machine body, and rotates the rotary between normal rotation and reverse rotation.
In addition, the operator walks along with the handle, stirring the soil with the claws of the rotary to till the field. If it is full, etc.,
The rotary may momentarily apply forward force to the machine, causing it to dunder, and an operator who is walking while cultivating while holding the handle with both hands may be suddenly pulled forward and fall. It's dangerous.

In particular, recently, small-sized tillers with an integrated rotary have been devised, but these small-sized tillers are usually used by amateurs who are unfamiliar with operating them in home gardens, etc. There is a demand for greater safety as well as simplicity.

Therefore, by sliding and positioning the resistance rod installed at the rear of the machine up and down and digging it into the soil, it is possible to prevent bushing by driving while receiving a large amount of resistance from the field. Since the rotary may not be supported by the resistance rod alone, it is recommended to manually adjust the plowing depth regulating ring and fix it in an appropriate position, and to perform tilling work while supporting the rotary with the bridge member provided at the tip of the regulating rod. The applicant has proposed a cultivator with this structure (Japanese Patent Application No. 1983-
(See No. 176996).

&→ Problems to be Solved by the Invention However, in the tiller proposed by the applicant mentioned above, the tilling depth regulating ring is manually positioned by sliding it up and down. Slide the plowing depth regulating ring up and down with one hand, and operate the fixing pin with the other hand to insert it into one of the many holes formed in the regulating rod to position and fix it. Therefore, it is necessary to use both hands, and as a result, setting the plowing depth using the plowing depth regulating ring takes time and there is a risk that operability may deteriorate.

(C) Means for Solving the Problems The present invention aims to solve the above-mentioned problems, and for example, as shown in FIGS. A locking member 52 is installed on one side of the front and back, and an inclined part 43b is provided on the other side,
Further, biasing members 56 and 57 for biasing the member 10 toward one side of the guide portion 43 are installed. The present invention is characterized in that a large number of notches 10a formed on one side of the bar member 10 are configured to be biased and engaged with the lock member 52.

(e) Operation Based on the above configuration, the plowing depth regulating ring 10 is moved M in the vertical direction of the machine.
l! When setting the plowing depth using Iib, the user grasps the plowing depth regulating ring 10 with one hand and pulls it toward the other side of the guide section 43. Then, the regulating rod 10 moves along the inclined surface 43b of the guide portion 43.
is tilted and the notch 10a is removed from the locking member 52, thereby releasing the regulating rod 10. In this state, the plowing depth regulating ring 10 is slid in the vertical direction of the machine body while being pulled toward the other side of the guide part 43, and when the plowing depth regulating ring 10 is properly positioned, the notch part 10a located at the position corresponding to the locking member 52 is inserted into the locking member. When you release your hand while engaging with 52, the regulation rod 1
0 is urged and moved toward the locking member 52 by the urging members 56 and 57, and the locking member 52 and the notch 10a are engaged and fixed, so that the plowing depth regulating ring 10 is It is set to the depth setting position.

(F) Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 12, the tiller 1 includes a mission case 2, an engine 3, and running wheels 5, which constitute a machine frame.
, rotary 6, handle 7, resistance rod 9 and plowing depth regulating ring l
It is equipped with O. Missy.

The engine case 2 is a large member made of a press-formed mating case. An engine frame 1) for mounting an engine 3 is fixed in front of the case 2, and a rotary cover 12 is installed on the rotary 6. Furthermore, a handle 7 is attached so as to extend diagonally rearward, and a running wheel 5 and a rotary 6 are attached to the tip of the V-shaped case portion (see Figure 1), respectively. In addition, the belt can be tensioned and relaxed freely by the tension pulley that constitutes the main clutch, extending from the output pulley of the engine 3 to the pulley fixed to the input shaft 13 of the transmission case 2 (see Figures 7 and 8). is wound around the belt, and the belt and pulley are covered with a case 15. Furthermore, a gear shift lever 16 extends from the top of the transmission case 2 along above the handle 7, and the gear shift lever 16 is connected to a guide plate that is attached to the fuel tank 17 on the top of the engine 3 and the transmission case 2. 19 guide groove 2
0 (see Figures 9 and 10). As shown in FIG. 9 or 10, the guide @20 of the guide plate 19 has the horizontal (left and right) positions at forward 1st speed position F8, forward 2nd speed position F2, neutral position N1, reverse position R, and work position. It consists of a traveling gear stage having a neutral position N', and a rotary rotation direction switching stage having a normal rotation position S1, a neutral position N8, and a reverse rotation position C in the vertical (vertical) direction.

As shown in FIGS. 5 to 8, the gear shift lever 16 has a U-shaped base end, and the U-shaped portion 16a is rotatable in the vertical direction by means of a bolt pin 21). It is also connected to the shifter interlocking shaft 22 so as to be integrally interlocked in the left and right direction. Further, the shifter interlocking shaft 22 is rotatably supported by a collar 23 fixed to the transmission case 2, and a speed change arm 25 is welded inside the case 2. Further, a transmission shift shaft 26 is disposed across the left and right sides of the mission case 2, and both ends of the shift shaft 26 are held by collars 27.27 and fixed with bolts 29.29. The shift shaft 2
6, a shift fork 30 is slidably inserted therein.

Further, the shift fork 30 is positioned and biased to a predetermined position by a click stop mechanism in the same manner as the shift shaft 26, and is connected to the speed change arm 25, and is spline-coupled to the input shaft 13 so that it can only slide freely. It is engaged with the shifter gear 31 for traveling. On the other hand, a U-shaped interlocking arm 32 is rotatably supported on the collar 27°27 which holds the speed change shift shaft 26, and the interlocking arm 32 has a long hole 32a extending laterally. The speed change lever 16 passes through the elongated hole 32a. As a result, as the speed change arm 16 moves up and down, it rotates around the collar 27 of the interlocking arm 16, but the horizontal movement of the lever 16 is absorbed by the elongated hole 32a and is not transmitted to the interlocking arm 32. In addition, a rotary shifter interlocking shaft 35 is attached to the collar 33 fixed to the mission case 2.
is rotatably supported, and a plate 36 is fixed to the interlocking shaft 35 on the outside of the case.

Further, a pin 37 is fixed to the tip of the plate 36, and the pin 37 has one end connected to the rod 3! ! is connected to via a pipe 40. Further, a rotary speed change arm 41 is welded to the inner side of the case of the interlocking shaft 35.

On the other hand, as shown in FIG. 1, in the rear part of the mission case 2, sliding grooves 42 and 43 are formed in the two mating cases by press working, and these sliding grooves 42 and 43 are formed by pressing, respectively.
The resistance rod 9 and the plowing depth regulating frame 10 are slidably inserted into the holes 2 and 43, respectively. Further, a bracket 2a is formed above the rear portion of the mission case 2, and a bell crank-shaped link 45 is supported on the bracket 2a so as to be rotatable in the longitudinal direction of the fuselage. Furthermore, as shown in FIG. 5, one end of the link 45 is formed in a U-shape, and a long hole 45m is bored in the U-shaped part, and a hole 45b is formed in the other end. It is perforated. On the other hand, the resistance rod 9 has a resistance plate 46 fixedly fixed at its tip so as to be tilted downward in the front of the fuselage, and the other end is held in the U-shaped part of the link 45 and has a long hole 45a in the link 45. By passing through the pin 47 at the same time, the body is configured to slide in the vertical direction by rotation of the link 45. Further, a key portion 39a formed at the other end of the rod 39 is rotatably fitted into the hole 45b of the link 45, so that the link 45 is rotated by being pulled by the rod 39 and the resistance rod 9 is rotated.
slide in the vertical direction of the aircraft.

Further, as shown in FIGS. 1 to 4, the plowing depth regulating frame 10 has a large number of notches 10a and 10a extending in its longitudinal direction.
. . , an m member 49 is fixed to one end, a manual lever 50 is fixed to the other end, and the other end protrudes upward from the rotary cover 12. In addition, the sliding groove 43 is
As shown in FIG. 1, it is formed by combining a recessed part 2b pressed into one of two mating cases with a flat part 2c of the other,
In addition, a tapered (or rounded) portion 43a is formed at the lower part of one side facing the front of the fuselage, and is inclined by a predetermined amount toward the front, and a tapered (or rounded) part 43a is formed on the other side facing the rear of the fuselage from the bottom to the top. A slope portion 43b that slopes at a fixed amount is formed.

Further, a plate 51 having a hole 51a having the same shape as the sliding groove 43 is bolted to a position corresponding to the upper side of the sliding groove 43 of the rotary cover 12, and one end of the plate 51 has a plowing depth. A lock pin 52 that engages the notch 10a of the regulating frame 10 is fixedly provided, and a bracket 55 provided with a pipe 53 is fixedly provided at the other end, and furthermore, a bracket 55 is provided with a pipe 53. is spring 57 and washer 5
A pin 56 is connected to the 10iM G IR via 8. On the other hand, as shown in FIG. 4 Cζ, the plowing depth regulating frame 1
0 notches 10a... are formed such that both ends of the open parts are widened outward by a predetermined angle θ from the direction perpendicular to the plowing depth regulating frame 10, thereby preventing the occurrence of burrs during press working. At the same time, it is configured to facilitate engagement with the lock pin 52.

Further, as shown in FIGS. 6 to 8, a rotary shift shaft 59 is disposed adjacent to the speed change shift shaft 26 and extends across both sides of the transmission case 2. A shift fork 60 is slidably inserted therein. The shift fork 60 is connected to the shift shaft 5.
9 is positioned and biased to a predetermined position by a click stop mechanism, and is engaged with a rotary thick gear 61 connected to the speed change arm 41 and slidably splined to the input shaft 13. are doing.

In addition, in FIG. 7, the shifter gear 31 is the gear 6.
2 for forward speed F1, engages #1 wheel 65 that is constantly meshing with gear 63 for forward second speed F2, and engages gear 67 that is constantly meshed for gear 66 for reverse speed. R is obtained, and the rotary shifter gear 61 engages with the gear 69 and engages with the gear 71 that is always meshed with the normal rotation SS gear 7o, so that a reverse rotation C is obtained. Furthermore, the rotation of the traveling transmission system is transmitted to the traveling wheels 5 via the chain and the differential gear, and the rotation of the rotary transmission system is transmitted to the rotary 6 via the chain.

Further, as shown in FIGS. 6 and 8, the handle 7 is attached so as to sandwich the transmission case 2 by a C-shaped bracket 72, and by attaching the bracket 72, the shift shaft 59 for the four-tary It is designed to prevent it from coming off.

Since this embodiment has the above configuration, the engine 3
The rotation is transmitted to the input shaft 1) of the transmission case 2 part via the belt inside the case 15. When the operator moves the shift lever 16 in the lateral (left and right) direction along the guide groove 20 of the guard plate 19, the left and right movement of the shift lever 16 is transmitted to the shift fork via the shifter interlocking shaft 22 and the shift arm 25. 30, the fork 30 is slid along the shift shaft 26 and positioned at an appropriate position corresponding to the indication on the guide plate. For example, when the shift lever 16 is moved from the neutral position 59N to the forward i12 heavy position F2, the fork 30 engages the travel shift shifter gear 31 with the gear 65, causing the tiller 1 to travel at high speed in order to adapt to non-working travel. When the vehicle moves to the reverse position R, the shifter gear 31 engages with the gear 67 and moves backward. At this time, shift lever 16
Depending on the left and right movement of the lever 16, the lever 16 simply slides inside the elongated hole 3'2a, and the interlocking arm 32 is not equally affected and the rotary stop position N is reached. is maintained.

When the shift lever 16 is operated in the vertical (up and down) direction along the guide groove 20 with the shift lever 16 located at the working neutral position N' on the guide plate 19, the interlocking arm 32 moves around the shift shaft 26. Rotates vertically. Then, the rotary shifter interlocking shaft 35 rotates via the rod 39 and the plate 36, and the shift fork 60 slides along the shift shaft 59 via the gear change arm 41, thereby corresponding to the display on the guide plate. It is positioned at an appropriate position. For example, when the shift lever 16 is moved from the neutral position N8 to the normal shift position 1s, the shift fork 60 is moved to the shifter gear 6.
1 is engaged with the gear 69 to transmit rotation in the same direction as the forward direction to the rotary 6. At this time, the arm 32 is rotated downward in conjunction with the operation of the gear shift lever 16, and the arm 32 further moves the rod 39 to the rear of the aircraft, so that the rod 39 is linked at its key portion 39a. Rotate 45 toward the rear of the aircraft. In this state, the link 45
Place the pin 47 along the long hole 45a? ,! fEjJ, the resistance plate 46 is moved downward along with the resistance rod 9, and as a result, the resistance plate 46 digs deeply into the soil as the machine runs and receives a large resistance, and the resistance plate 46 receives a large amount of resistance from the field due to the rotary 6. Absorbs force and prevents dashing. Further, when moving to the reverse rotation position C, the shifter gear 61 is moved to the gear 71.
The rotation in the direction opposite to the forward direction is transmitted to the rotary 6. In this state, the arm 32 is rotated toward the front of the fuselage, contrary to the normal rotation of the rotary 6, and the rod 39 rotates the link 42 in the same direction as the arm 32, thereby causing the resistance rod 9 and the resistance plate to rotate. 46 towards the top of the aircraft. Therefore, in this state, the resistance plate 46 does not dig deep into the soil, and therefore does not receive large resistance from the field.

Then, with the gear shift lever 16 moved up or down,
Move the lever 16 forward along the guide groove 20 to the first gear position F;
Move horizontally so that Then, in the same manner as described above, the shifter gear 31 is shifted to engage the gear 62 via the shifter interlocking shaft 22, the transmission arm 25, and the shift fork 30, and low-speed rotation suitable for the work is transmitted to the wheels 5. . As a result, the tiller 4jJ1) moves forward with the rotary 6 rotating forward or backward, and the tilling work is performed.

In addition, in hard fields, the tilling depth is determined by the resistance rod 9, so adjustment using the plowing depth regulating frame 10 having 48 members 49 is not necessary. It may not be possible to support 6.

At this time, in order to set the bridge member 49 to its use condition,
First, grasp the manual lever 50 with one hand and pull it toward the rear of the aircraft. Then, the plowing depth regulating frame 10 is tilted rearward along the inclined portion 43b while pressing the pin 56 against the biasing force of the spring 57. Therefore, the notch portion 10a that was engaged with the engagement pin 52 is removed, and the plowing depth regulating frame 10 is placed in a free state. In this state, the operator slides the manual lever 50 upward or downward while holding the manual lever 50 with one hand to appropriately position the regulation frame 10, and then moves the notch 10a at a position corresponding to the engagement pin 52 to the desired position. Release your hand while aligning with pin 52. As a result, the plowing depth regulating frame 10 is moved forward by the urging force of the spring 57, and the notch 10 is moved forward by the urging force of the spring 57.
a is engaged with the engaging pin 52, and the regulating frame 10 is positioned.
Be fixed. Note that when the regulating frame 10 is tilted backward and sliding up and down, one side of the regulating frame 10 comes into sliding contact with the lower side of the sliding groove 43 facing the front of the aircraft. Since the taper (or rounded) portion 43a is formed in the plowing depth regulating frame 10, the plowing depth regulating frame 10 is slid smoothly without catching the cutout portions 10a. Further, when the tiller 1 is moved forward, the Ia member 49 is pushed backward by the resistance force from the field, and the plowing depth regulating frame 10 is rotated counterclockwise in FIG. Since the notch portion 10a tends to rotate in the direction, the engagement of the notch portion 10a with the lock pin 52 is further strengthened, thereby further securely fixing the regulating frame 10 at the set position.

In addition, as shown in FIGS. 13 [a] and (b), the pipe 5
An insertion hole 53a is bored in the lateral direction of 3, and the insertion hole 53a is
By attaching and detaching the clip pin 73 to and releasing the pin 56, the notch 10a is prevented from coming off the lock pin 52 when the plowing depth regulating ring 10 does not need to be slid. , the regulation frame 10 may be configured to be more securely fixed.

(1.) As described in detail, according to the present invention, the bar member 10 is biased toward one side of the guide portion 43 by the biasing members 56 and 57, and the notch portion of the bar member 10 is 10a... are configured to urge and engage with the locking member 52, and the inclined portion 43b is formed on the other side of the guide portion 43, so that the bar member 10 can be pulled to the other side of the guide portion 43 with one hand. The biasing member can be easily removed from the engagement pin 52 to be in a free state by simply tilting it along the inclined portion 43b.Furthermore, by simply sliding it up and down and releasing your hand at the appropriate position, the biasing member can be removed. The notch portion 10a of the bar member 10 can be engaged with the lock member 52 and securely fixed by the biasing force of 56.57, so that when the lever member 10 is slid to set the plowing depth, It is possible to easily position and fix the bar member 10 using only one hand, and therefore it is possible to provide tillage 81) with good operability, in which the plowing depth can be set with the spear member 49 with one touch, and the simple method. The structure can also reduce costs.

Furthermore, the lower part of one side of the guide part 10 is provided with a tapered part (or rounded face) 43a that guides the notch part 10a of the part member 10.
Then, the part member 10 is moved along the inclined portion 43b to P! i
When sliding and positioning at an angle, the notch 10a...
- can slide smoothly without being caught on the lower part of one side of the guide portion 43a.

Furthermore, if the cutout portion 10a of the bar member 10 is expanded outward at a predetermined angle, it is possible to prevent burrs during press working and improve workability, and also to prevent sliding of the bar member 10. During movement, the contact pressure between the notch 10m and the lower part of one side of the guide section 43 is reduced, allowing the part member 10 to slide more smoothly, and the engagement with the locking member 52 is made easier and more reliable. can be done.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the tillage depth aS rod and its positioning structure according to the present invention, Fig. 2 is a perspective view showing the main parts in detail, Fig. 3 (al is a side view showing the sliding groove, Fig. 3(b) is a plan view of the same, Fig. 4 is a side view showing the plowing depth regulating rod in detail, Fig. 5 is a diagram showing the interlocking structure of the speed change lever and the resistance rod, and Fig. 6 is a view of the speed change operating device. 7 is a sectional view taken along the line ■-■ in FIG. 6, FIG. 8 is a sectional view taken along the line ■-■ in FIG. 6, FIG. 9 is a front view showing the guide groove of the guide plate, and FIG. 10. Figure 1) is a front view showing a partially modified guide groove, Figure 1) is a side view showing the transmission case, Figure 12 is an overall side view of the tiller, Figure 13 (al is the biasing of the tilling depth regulating rod). Fig. 13(b) is a side sectional view showing another embodiment of the part.
is its front view. 1... Tiller, 6... Rotary, 1
0... Part member (tilting depth regulating rod), 10 a...
Notch. Part, 43... Guide part (sliding groove), 43b...
- Inclined portion, 49... Seed member, 52... Lock member (pin), 56, 57... Biasing member (pin, spring). Figure 2 Figure 4 Figure 7 Figure 8 Figure 9 Figure 10

Claims (3)

[Claims] (1) The machine body is equipped with a rotary, and a bar member with a sled member at the tip is slidably installed in a guide section formed on the machine body, and the bar member is slid and positioned, so that the rotary The tiller is configured to adjust the depth of the tiller, wherein a locking member is installed on either the front or rear side of the guide part, an inclined part is provided on the other side, and the bar member is further installed on one side of the guide part. A tiller, characterized in that a biasing member is provided to bias the bar member, and a plurality of notches formed on one side of the bar member are biased and engaged with the locking member. (2) The tiller according to claim 1, wherein a lower portion of one side of the guide portion is a tapered surface or a rounded surface that guides the notch portion of the bar member. (3) The tiller according to claim 1, wherein the notch portion of the bar member widens outward at a predetermined angle.