JP2609896B2 - Tiller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Use The present invention relates to a tiller, particularly a small tiller integrally configured with a rotary, and more specifically, a frame for attaching a handle or the like is provided in a mission case. Related to tillers.

(B) Conventional technology Conventionally, some tillers use a transmission case as a body frame. In this case, an engine is mounted via an engine frame in front of the body frame, and rearward of the body frame. A handle is disposed in the handle via a handle frame. The operator is walking and cultivating while holding the handle with both hands.

(C) Problems to be Solved by the Invention By the way, the handle frame of the above-mentioned conventional tiller receives a large force when the operator holds the handle, so that the handle frame is attached to the mission case which is regarded as the body frame. In this case, the brackets are firmly attached through a large number of brackets, so that the structure increases the number of parts and raises the cost.

Therefore, an object of the present invention is to provide a tiller that is configured to securely attach a handle frame using a flange portion of a transmission case, and that solves the above-described problems.

(D) Means for Solving the Problems The present invention has been made in view of the above circumstances. For example, referring to FIG. 1 to FIG. 3, a frame (13) for attaching a handle (7) and the like is shown. ) Is provided in the mission case (2), the insertion hole (1) is provided in the flange portion (2a) of the mission case (2).
5) and (16), and the mission case (1)
A bolt (27) is attached to the shaft (26) provided in the case from the outside of the case.
A screw hole (28) (see FIG. 5) is formed so that the flange (2a) can be clamped from both sides at the tip of the frame (13), and the insertion hole (15 ),
(16) and bolt holes (1) at positions corresponding to screw holes (28).
7), (19), and (25) are formed with a support (12),
The flange portion (2a) is clamped by the support portion (12) so that the bolt holes (17), (19) and (25) and the insertion hole (1
5), (16), screw holes (28) and bolts (22), (2
3) and (27) are inserted to fix the frame (7) to the transmission case (2).

(E) Action Based on the above configuration, the operator walks while holding the handle (7) at the time of cultivating work or the like, and a large force acts on the handle (7), but the handle (7) is not operated. The supporting frame (13) is fastened by inserting bolts (22), (23) and (27) into the insertion holes (15) and (16) and the screw hole (28) of the mission case (2). It is firmly fixed by this and does not rattle.

Note that the reference numerals in parentheses do not limit the configuration at all.

(F) Example Hereinafter, an example according to the present invention will be described with reference to the drawings.

As shown in FIG. 10, the tiller 1 includes a mission case 2, an engine 3, a traveling wheel 5, a rotary 6, a handle 7, a resistance rod 8 for preventing dashing, and a rotary tilling depth control device 9 which constitute a body frame. I have it. The transmission case 2 is made of a large-sized member composed of press-formed plates 10a and 10b (see FIG. 4) formed in a pressing case and formed by a press. An engine frame 11 for mounting the engine 3 is fixed in front of the transmission case. The running wheels 5 and the rotary 6 are mounted on the front end of the figure-shaped case.

A handle 7 provided on the transmission case 2 so as to extend obliquely rearward is provided in the transmission case 2 shown in FIG.
As shown in (b), (c) and FIGS. 3 (a), (b),
Handle frame fixed to the upper surface of frame support member 12
Installed on 13. Further, holes 15 and 16 (see FIG. 2) are formed in the mating flange 2a, which is a combination of the flange portions of the mission case 2, and the frame supporting member 12 is further provided.
Bolt holes 17, 19 at positions corresponding to the holes 15, 16 on both sides of
Pipes 20 and 21 are welded to the bolt holes 17 and 19 so as to protrude inward of the frame support member 12. A gap s for inserting the mating flange 2a is formed at the position where the pipes 20 and 21 oppose each other. Pipes 21,21 through holes 15,16
And tighten with nuts n, n. In addition, the frame support member 12 is provided at a position where a triangle is formed with the bolts 17 and 19.
A third bolt hole 25 is formed, and the third bolt hole 25 has screw holes formed at both ends of the rotary shift shaft 26 (see FIG. 5) housed in the mission case 2.
The frame support member 12 is configured to be firmly fixed to the transmission case 2 by screwing bolts 27, 27 from outside to the frame support members 28, 28. The shift shaft 26 for the vehicle is prevented from coming off.

Further, as shown in FIG. 10, a tension pulley that constitutes a main clutch extends from an output pulley of the engine 3 to a pulley fixed to an input shaft 29 (see FIGS. 4 and 5) of the transmission case 2. A tension / relaxation belt is wound, and the belt and the pulley are covered with a case 30. Further, from the top of the mission case 2 to the handle 7
A gear shift lever 31 extends along the upper side of the engine, and the gear shift lever 31 is guided in a guide groove 35 of a guide plate 33 mounted over the fuel tank 32 above the engine 3 and the transmission case 2. As shown in FIG. 6, the guide groove 35 has a forward (first) speed position F ₁ in the lateral (left and right) direction and a second forward position 2
A rotary rotation having a forward gear position S, a neutral position N _R, and a reverse position C in the vertical (up and down) direction, which is composed of a traveling gear position having a speed position F ₂ , a neutral position N, a reverse position R, and a work neutral position N ′. It consists of a direction switching stage.

As shown in FIGS. 2, 4, and 9 (a), the shift lever 31 has a U-shaped base end portion, and the U-shaped portion 31a is a bolt pin 36. A shifter interlocking shaft that is vertically rotatable and interlocks horizontally
It is connected to 37. Further, the shifter interlocking shaft 37 is rotatably supported by a collar 39 fixed to the transmission case 2 and a speed change arm 40 is welded inside the case 2.

Further, the transmission case 2 is provided with a shift shift shaft 41 over its left and right side surfaces, and both ends of the shift shaft 41 are clamped by collars 42, 42 and fixed by bolts 43, 43. A shift fork 45 is slidably fitted on the shift shaft 41. The shift fork 45 is biased to a predetermined position between the shift fork 45 and the shift shaft 41 by a click stop mechanism, is connected to the speed change arm 40, and is spline-connected to the input shaft 29 so as to slide only. Is engaged with the running shifter gear 46. On the other hand, a U-shaped interlocking arm 47 is rotatably supported by the collars 42, 42 that sandwich the speed shift shaft 41.
A long hole 47a extending in the lateral direction is formed in the interlocking arm 47, and the transmission lever 31 penetrates the long hole 47a. Thereby, the interlocking arm 47 rotates about the collar 42 by the up and down movement of the speed change lever 31, but the left and right movement of the lever 31 is absorbed by the elongated hole 47a and is not transmitted to the interlocking arm 47.

The collar 50 fixed to the transmission case 2
9, a rotary shifter interlocking shaft 51 is rotatably supported, and a plate 52 is fixed to the interlocking shaft 51 outside the case as shown in FIGS. 9 (a) and 9 (b). Further, a pin 53 is fixed to the tip of the plate 52, and the pin 53 is connected to a rod 55 having one end connected to the interlocking arm 47 by a pipe.
It is connected through 56. Furthermore, mission case 2
At a position corresponding to the plate 52, a notch 57 is formed by notching the mating flange 2a to a predetermined width.Therefore, the plate 52 which is rotated via the rod 55 by the rotation of the interlocking arm 47 is Since the rotation direction is restricted by both ends of the notch 57, the lever 31 is operated to a predetermined amount or more due to an error due to the long hole 47a of the interlocking arm 47 and the shaft diameter of the shift lever 31. In this case, overshifting can be prevented, and problems such as contact with adjacent gears and incorrect biting can be reliably prevented. Further, a rotary speed change arm 59 is welded to the inner portion of the case of the interlocking shaft 51. Further, as shown in FIG. 8, the other end of the rod 55 extends rearward of the fuselage and is connected to the tip of the resistance rod 8 via an arm 60. When the rod 55 slides, the arm 60 The resistance rod 8 pivotally pivoted about 61 moves the resistance rod 8 slidably received in the slide groove 62 in the vertical direction.

In addition, as shown in FIG. 2 and FIG.
Passes through a space surrounded by the inner side surface of the frame supporting member 12 and the pipes 20 and 21. Therefore, even if the rod 52 bends due to a reaction force or the like acting on the resistance rod 8 from the ground, at least in the vertical direction The frame support member 12 and pipes 20, 21
Since it is supported by, it does not bend.

As shown in FIGS. 2 and 5, a rotary shift shaft 26 is provided so as to extend over both sides of the transmission case adjacent to the shift shaft 41. A shift fork 64 is slidably inserted.
The shift fork 64 is biased to a predetermined position by a click strip mechanism between the shift fork 64 and the shift shaft 26, and the shift fork 64 is connected to the speed change arm 59 and is connected to the input shaft.
It is engaged with a rotary shifter gear 63 slidably connected to 29.

In FIG. 4, the shift gear 46 for shifting is a gear 65.
To the forward first speed F ₁ , the gear 67 which is always meshed with the gear 66 is engaged to the second forward speed F ₂ , and the gear 70 which is always meshed with the gear 69 is engaged to the reverse R And the rotary shifter gear 63 is engaged with the gear 71 so that the forward rotation S and the gear 72
The reverse rotation C is obtained by engaging with the gear 73 which is always meshed with. 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.

Since the present embodiment is configured as described above, the rotation of the engine 3 is transmitted to the input shaft of the transmission case 2 portion via the belt inside the case 30. When the operator moves the speed change lever 31 in the lateral (left and right) direction along the guide groove 35 of the guide plate 33, the left and right movements of the speed change lever 31 are transferred to the shift fork 45 via the shifter interlocking shaft 37 and the speed change arm 40. The fork 45 is transmitted, slides along the shift shaft 41, and is positioned at an appropriate position corresponding to the display on the guide plate 33. For example, moving the shift lever 31 from the neutral position N to the forward second speed position F _2, fork 45 is high speed in order to adapt the cultivator 1 in the non-working traveling along the traveling speed shifter gear 46 engages the gear 67 Then, when the shifter gear 46 moves to the reverse position R, the shifter gear 46 engages with the gear 70 to move backward. Note at this time, by the lateral movement of the shift lever 31, without being any way affect interlock arm 47 with only the lever 31 slides elongated hole 47a, it is maintained in the rotary stop position N _R.

When the shift lever 31 is operated in the vertical (up / down) direction along the guide groove 35 while the shift lever 31 is located at the work neutral position N 'in the guide plate 33, the interlocking arm 47 is moved around the shift shaft 41. Rotate vertically. Then the rod
The rotary shifter interlocking shaft 51 rotates through 55 and the plate 52, further slides the shift fork 64 along the shift shaft 26 through the speed change arm 59, and an appropriate position corresponding to the display of the guide plate 33. Positioned at. For example, when the shift lever 31 is moved from the neutral position N _R to the normal rotation position S, the shift fork 64 engages the shifter gear 63 with the gear 71 to transmit the rotation in the same direction as the forward direction to the rotary 6. At this time, when the arm 47 is turned downwardly in association with the operation of the shift lever 31, the arm 47 moves the rod 55 to the rear of the aircraft, and the rod 55 moves the arm 60 to the rear of the aircraft. The resistance rod 8 arm is slid downward, whereby the resistance plate 75 at the tip of the resistance rod 8 penetrates deeply into the soil due to the running of the fuselage and receives a large resistance. Dashing is prevented by absorbing reaction force from the field. Also,
When the shift lever 31 is moved to the reverse rotation position C, the shifter gear 63
Engages with the gear 73 to transmit the rotation in the direction opposite to the forward direction to the rotary 6. In this state, the arm 47 is rotated toward the front of the fuselage in the opposite direction to the normal rotation of the rotary 6, whereby the rod 55 rotates the arm 60 in the same direction as the arm 47 and the resistance bar 8 is moved upward. Move towards.

Then, with the shift lever 31 moved up or down,
Move laterally so that the forward first speed position F ₁ along the guide grooves 35 of the lever 31. Then, as described above, the shifter gear 46 is shifted via the shifter interlocking shaft 37, the speed change arm 40, and the shift fork 49 so as to engage with the gear 65,
The low-speed rotation suitable for the work is transmitted to the wheels 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.

Further, the frame support member 12 supporting and fixing the handle 7 through the handle frame 13 is covered so as to sandwich the mating flange 2a of the mission case 2 from both sides with the pipes 20, 20, 21, 21 and Bolts 22 and 23 are inserted from the bolt holes 17 and 19, penetrate the pipes 20 and 20, the holes 15 and 16 and the pipes 21 and 21 and are fastened with nuts n and n. The bolts 27 are inserted into the bolts 25, and the bolts 27, 27 are fixed by screwing the bolts 27, 27 into the screw holes 28, 28 of the rotary shift shaft 26 exposed on the side of the case 2, respectively. The support member 12 is firmly installed on the transmission case 2 by the bolts 22, 23, 27, so that the handle 7 is rattled when the handle 7 is moved in the longitudinal direction of the fuselage, in the lateral direction, or in any other direction. Handle surely Capable of supporting and fixing the.

In this embodiment, the handle frame 13 is a frame fixed to the transmission case 2 with bolts. However, the cultivation plate 76 shown by a two-dot chain line in FIG. 2 may be firmly attached.

Further, as shown in FIG. 11 and FIG. 12, an embodiment in which a differential device is installed in the traveling part in order to improve the traveling performance of the tiller 1 will be described.

The differential device 77 includes a differential gear unit 79 and a ring gear mount case 80, and the gear mount case 80 further fixes a ring gear 82 to which rotation can be transmitted by a chain 81,
The differential gear unit 79 supports the differential pinion 83 to form a differential carrier. Further, the differential gear unit 79 has left and right side gears 85 and 86 meshing with the pinion 83, and these side gears 85 and 86 can connect the left and right axles 87 and 89, respectively.
Further, on one side of the ring gear mount case 80, a number of ball holes 90 for accommodating the balls 84 are formed along the circumference thereof, and on the outer periphery of the boss portion 86a of the side gear 86, the ball holes 90 are formed. Multiple ball grooves to accommodate each
91 are formed, and a shifter 92 is slidably fitted to one side of the gear mount case 80 adjacent to the ball holes 90. Then, the shifter 92 is the 11th of the operation lever 95.
It is configured to slide in the direction of the arrow B in FIG. 12 in conjunction with the turning operation in the direction of the arrow A in FIG.
The side gear 86 can be integrated with the gear mount case 80 to be differentially locked by pushing into the ball groove 91.

Therefore, at the time of normal tillage work, the shift lever 92 is slid by operating the operation lever 95 to release the balls 84, and a smooth turning operation can be performed in a state where the differential lock is released.
Also, in a sloping land or in a field with a lot of unevenness in the left and right directions, the shift lever 92 is slid in the opposite direction by operating the operation lever 95, the balls 84 are pushed into the ball grooves 91, the diff lock is performed, and the work is performed in a state where the straightness is improved. can do.

Further, in the present embodiment, the resistance rod 8 is lowered to the field scene and the resistance plate 75 travels while receiving the earth pressure to prevent the dashing.
A tiller 1 'configured to protrude a resistance pin from the vicinity toward a field and thereby prevent a dashing phenomenon will be described with reference to FIGS. 13 to 15. FIG.

A pin mounting member 96 formed concentrically is installed inside the traveling wheel 5, and a plurality of resistance pins 99 urged in the center direction by a spring 97 on the outer periphery of the mounting member 96.
Are arranged at predetermined intervals. A support member 100 fixed to the transmission case 2 around the axle 87 (89) is also provided.
A circular pin regulation plate 101 is eccentrically fitted so as to bulge downward and is slidably engaged with the pin regulation plate 101.
The position of 101 can be switched by rotating an L-shaped arm 102 by operating a lever or the like.

Therefore, when cultivating the rotary 6 while rotating it in the forward direction, the arm 102 is rotated by a lever operation or the like, whereby the pin regulation plate 101 slides toward the traveling wheel 5 side and the resistance pins 99 ... Push it towards you. Then, the resistance pins 99 ... Sliding on the circumference of the pin regulation plate 101 along with the pin mounting member 96 rotating with the traveling wheel 5 are eccentric to the regulation plate when sliding downward. It is projected outward by 101 and projects from the circumference of the traveling wheel 5 in a side view. On the other hand, the resistance pins 99 extending from the lower side to the upper side maintain the state as they are without being pressed by the regulation plate 101, so that they do not project to the outside of the traveling wheel 5 and do not contact the fender 103. As a result, by operating the arm 102, the resistance pins 99 ... Can be projected only at a portion in contact with the field to obtain a dashing prevention effect, and the resistance pins 99 ... Do not contact the fender 103. As a result, the portion of the fender 103 can be lowered, the center of gravity of the body can be lowered, and stable traveling performance can be provided.

(G) Effect of the Invention As described above, according to the present invention, the flange portion (2a) is clamped by the support portion (12) so that the bolt holes (17),
(19), (25) and insertion holes (15), (16), screw holes (28)
The frame (7) is fixed to the transmission case (2) by inserting the set bolts (22), (23), and (27) into the transmission case (2).
The frame (13) can be firmly attached to the transmission case (2), so that the members can also be used and the number of parts to be attached can be reduced, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 (a) is a side view showing a handle frame mounting structure according to the present invention, and FIG. 1 (b) is a cross-sectional view taken along a line bb in FIG. FIG. 1 (c) is a front view showing only the frame support member, FIG. 2 is a cross-sectional view of a gear shift operating device, and FIG.
Figure (a) is a side view showing the handle frame and the support member, Figure 3 (b) is a plan view thereof, and Figure 4 is Figure 2-IV-IV
2 is a sectional view taken along line V-V in FIG. 2, FIG. 6 is a front view showing a guide groove of a guide plate, and FIG. 7 is a front view showing a state of a rod passing inside the support member. Figure, 8th
FIG. 9 (a) is a side view, FIG. 9 (a) is a perspective view showing a state in which a plate for switching between forward and reverse rotation of a rotary is provided in a cutout portion of a mating flange, FIG. 9 (b) is a plan view thereof, FIG. Is an overall side view showing a tiller to which the present invention is applied, FIG. 11 is a side view showing a differential device, and FIG. 12 is a sectional view thereof. FIG. 13 is a cross-sectional view showing another embodiment in which a resistance pin is projected on the circumference of a traveling wheel, FIG. 14 is a side view thereof, and FIG. 15 is a tiller using the resistance pin. It is the whole side view shown. DESCRIPTION OF SYMBOLS 1 ... Tiller, 2 ... Mission case, 2a ... Flange part (Mating flange part), 7 ... Handle, 12 ... Support part (frame support member), 13 ... Frame (handle frame), 15, 16 ... insertion holes (holes), 17, 19, 25 ... bolt holes, 26 ... shaft (rotary shift shaft), 27 ... bolts, 28 ... screw holes.

Claims (1)

(57) [Claims] 1. A tiller in which a frame for attaching a handle and the like is provided in a mission case, wherein an insertion hole is formed in a flange portion of the mission case,
Further, a screw hole is formed in a shaft provided in the mission case so that a bolt can be screwed from the outside of the case, and further, the flange portion can be clamped from both sides at the tip of the frame and the insertion hole. And a support portion having a bolt hole formed at a position corresponding to the screw hole, the flange portion is sandwiched by the support portion, and the bolt hole is inserted into the insertion hole, and the bolt is inserted by aligning the screw hole. A tiller comprising a frame fixed to the mission case.