JPH08276873A - Handlebar attaching device for cultivator - Google Patents

Abstract

PURPOSE: To provide a simple handlebar attaching structure having an enhanced rigidity and facilitating the height of handlebars. CONSTITUTION: A coupling plate 33 is provided connecting between the left and right side parts 35 of a handle bracket 8 which is provided to the upper side part of a running transmission casing having an axle in the lower part, which have an arched cross-sectional shape and which is adapted for attaching a handle, and is formed therein with a pin hole 32 for adjusting the position of the handle, and a longitudinally insertable and withdrawable lock pin 66 is provided in a coupling member 66 connecting between the left and right base parts 34 of the handle 7. This lock pin 66 is provided engageable in the pin hole 32 in a connecting plate 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handle mounting device for a tiller. It can be used as a handle tractor.

[0002]

2. Description of the Related Art In order to adjust the vertical position of a handle, the base of the handle is pivotally supported in a vertically rotatable manner with respect to a bracket on a transmission case. Pull out and insert the horizontal pin at a position that is a proper distance from. With such a configuration, since the bracket and the handle are connected to each other by the pin, it is necessary to keep the rigidity of the bracket at a thickness, which increases the weight. Also, the operation of pulling out and inserting the pin is troublesome.

[0003]

SUMMARY OF THE INVENTION According to the present invention, a handle bracket 8 for mounting a steering handle 7 is formed on the upper side of a traveling transmission case 1 having a wheel shaft 19 at a lower portion thereof, and the handle bracket 8 is formed in a gate shape extending right and left. 8 is provided with a connecting plate 33 for connecting the left and right side portions 35 and a pin hole 32 for adjusting the handle position, and a connecting portion 65 for connecting the left and right base portions 34 of the handle 7 is inserted and removed front and rear. A lock pin 66 is provided, and the handle pin attachment device of the cultivator is configured such that the lock pin 66 can be engaged with the pin hole 32 of the connecting plate 33.

[0004]

When the height of the steering handle 7 is changed, the steering pin 7 is attached to the handle bracket 8 while the lock pin 66 attached to the connecting member 65 of the base 34 is pulled out and inserted in the front-rear direction. Then, the lock pin 66 is rotated up and down to change the engagement position of the lock pin 66 with respect to the pin hole 32 of the connecting plate 33.

Since the operation of the lock pin 66 at this time is in the front-back direction along the control handle 7, the operator can easily perform the operation while gripping the control handle 7. Further, since the handle bracket 8 is in the shape of a gate and the left and right side portions 35 are connected by the connecting plate 33, the handle bracket 8 is made of a relatively thin sheet metal and can be made lightweight and maintain rigidity.
The left and right bases 34 of the steering wheel 7 are also connected by the connecting member 65 to maintain rigidity, and the stable steering wheel 7 structure and steering can be performed.

[0006]

In the embodiment of the present invention, a wheel transmission case 1 and a rear rotary transmission case 2 are connected by a connecting plate 3, and the transmission shafts 4 and 5 of the transmission cases 1 and 2 are connected to each other. And a transmission case 6 connected to each other, and a bracket 8 for mounting a steering handle 7 is provided at an upper end portion of the wheel transmission case 1. The bracket 8 has a traveling transmission 9 and a rotary transmission case 2 in the wheel transmission case 1. Forward / reverse device 1
The structure of the cultivator is provided with a single speed change lever 11 for operating 0 and 0.

A rotary transmission case 2 is integrally connected to the rear side of the wheel transmission case 1 on the vehicle body side through a connecting plate 3, and a transmission case 6 is connected between the upper portions of the transmission cases 1 and 2. The transmission shafts 4 and 5 are connected. The steering handle 7 is attached to a bracket 8 above the wheel transmission case 1, and a speed change lever 11 is attached. In the speed change operation, by operating the single speed change lever 11, the traveling speed change device 9 in the wheel transmission case 1 is changed in speed, and the forward / reverse rotation device in the rotary transmission case 2 is switched to normal rotation or reverse rotation. .

The vehicle body has an engine E mounted on the front side of the traveling transmission case 1 via an engine bracket 12, and has a steering handle 7 on the upper side toward the rear upper side via a handle bracket 8. Engine shaft 13 and traveling transmission case 1
A belt 14 and a tension pulley 15 are interlocked with the upper transmission shaft 4 and are covered with a transmission case 16. 17
Is a bolt for attaching the engine bracket 12 to the front edge portion of the wheel transmission case 1, and 18 is a mounting bolt for the handle bracket 8. 19 is an axle, and wheels 20 are provided on both left and right sides.
And is transmitted from the transmission shaft 4 via a transmission mechanism in the wheel transmission case 1.

The rotary transmission case 2 has a plowing claw 22 or other weeding rotors on both left and right sides of a lower rotary shaft 21 and can perform work such as plowing, crushed soil, intermediate plowing, or weeding. Further, it has a transmission shaft 5 on the upper part, and the transmission mechanism transmits between the upper and lower transmission shafts 5 and the rotary shaft 21.
The rotary transmission case 2 is appropriately inclined rearward and downward, and the front edge portion and the traveling transmission case 1 are connected by a connecting plate 3. Reference numerals 23, 24 and 27 are the mounting bolts. 25 is a rotary cover, which is a rotary transmission case 2
It is attached to the front and rear edge portions by mounting bolts 24, 27, a bracket 26, a bolt 28, and the like.

This bracket 26 is used for the rotary cover 2
5, the socket 29 is also integrated. Bracket 26
In the rear socket 29, a resistance rod 30 is vertically adjustable by a pin hole 31 immediately after the rotary transmission case 2. 36 is a rear cover. This rear cover 36
It has a leveling edge 93 at the lower end for leveling the cultivated soil surface, and can be moved up and down by being pushed down by its own weight or a spring on the rear side of the rotary cover 25. The pivot 94 of the rear cover 36
Are provided on the right and left outer sides of the rotary cover 25 and in front of the rotary shaft 21 to reduce the angle change during soil leveling. At the lower position, the upper end edge 95 is engaged with the rear lower end edge 96 of the rotary cover 25 and becomes the lower limit position. The rear cover 36 has an upper portion formed into an arcuate curved surface centered on the rotary shaft 21 portion, but a lower portion is bent to the rear side 97 so as to facilitate leveling.

The resistance rod 30 can be moved up and down along the socket 29 to adjust the vertical position by the pin 31, and a resistance piece 98 is horizontally provided at the lower end of the resistance rod 30.
The resistance piece 98 can support the lower end flat edge 93 at the center of the width of the rear cover 36. Therefore, the resistance rod 30
When moving up, the rear cover 36 can also be pushed upward, but when it rises up to the middle position A, the rear end of the resistance piece 98 comes off from the flat edge 93 of the rear cover 36 to the inside, and the rear cover 36 is lifted. You will not be able to raise it further. Also, at the upper end of the rear cover 36,
A bracket 99 is provided at a position facing the resistance rod 30, and at the position B where the rear cover 36 is raised, the bracket 99 fits on the upper part of the resistance rod 30 and is locked between the pin holes between them at this fitting portion. The pin 100 is inserted and the rear cover 36 is held in the raised position, which is the non-use posture.
101 is a stopper provided on the resistance rod 30, which is a socket 2
It can be engaged with the lower edge of 9 and locked at the upper limit position B. The resistance rod 30 cannot rise any further.

Reference numeral 102 denotes a fitting for the auxiliary cover 103, which allows the auxiliary cover 103 to be attached to and detached from the front side of the rotary cover 25. Further, 104 is an auxiliary plate 10 at the lower end of the rear cover 36.
It is a fixture for attaching 5. The auxiliary plate 105 may be prepared in various forms depending on the leveling form of the soil, the ridge forming form, and the like. The transmission case 6 mounted between the upper portion of the wheel transmission case 1 and the upper portion of the rotary transmission case 2 is
It covers a chain 47 transmission mechanism that interlocks between the transmission shafts 4 and 5, and has a thick connecting plate 38 that is attached and connected between the transmission cases 1 and 2. This connecting plate 38
Is to fit the transmission shaft 4 side to the bearing tubular portion 39 formed around the transmission shaft 4 of the wheel transmission case 1, and to set the transmission shaft 5 side to
It is fitted to a bearing tubular portion 40 formed around the transmission shaft 5 of the rotary transmission case 2, and a fixing piece 41 integral with the bearing tubular portion 40 and this connecting plate 38 are fixed by tightening with a bolt 42. are doing.

A cover 43 is provided outside the connecting plate 38, and a rubber seal 44 is interposed between the cover 43 and the connecting plate 38.
Is fitted to the outer peripheral edge of and is fixed by tightening with a bolt 45. The rubber seal 44 is formed by bending the outer peripheral edge 46 of the cover 43 in the outer peripheral direction to form an edge parallel to the surface of the connecting plate 38, and the rubber seal 44 is fitted to the outer peripheral edge 46. 47
Is a chain and is hung between the sprockets of the transmission shafts 4 and 5.

The traveling transmission case 1 is provided with a traveling transmission device 9, and the transmission shaft 4 for transmitting the belt 14 has a transmission gear 49 operated by a shifter 48, which meshes with the transmission gear 49. Counter shaft 51 of counter gear 50, back counter shaft 5 of back counter gear 52
3 and the like are mounted on a shaft, and a chain 55 is interlocked between a sprocket shaft 54 geared from the counter shaft 51 and a sprocket of the front end axle 19. The shift gear 49 that is shifted by the shifter 48 is shifted to a high speed position H and a low speed position L that mesh with the counter gear 50, a reverse position R that meshes with the back counter gear 52, and each neutral position N therebetween. It

A forward / reverse rotation device 10 is provided in the rotary transmission case 2 in the previous term, and a transmission shaft 5 having a switching gear 57 operated by a shifter 56 and a shaft 59 of a forward rotation gear 58.
And a shaft 61 of the reverse rotation gear 60, and a sprocket shaft 62 gear-interlocked with the shaft 59. The chain 63 is extended and interlocked with a sprocket between the sprocket shaft 62 and the rotary shaft 21. The shifter 56 has a normal rotation position A at which the switching gear 57 meshes with the normal rotation gear 58,
The reverse position B is engaged with the reverse gear 60 and the neutral position N between them is operated.

Steering handle 7 for the bracket 8
The rear end portion is formed into a loop shape, and the front end base portion 34 is pivotally supported by a lateral pin 64 so that the front end base portion 34 extends along the outer side portions of the left and right outer side portions 35 of the bracket 8. Further, the left and right base portions 34 of the steering handle 7 are integrally connected by a connecting member 65, and the attachment piece 6 is attached to the central portion of the connecting member 65.
7 is made to hang down, and the lock pin 66 is attached. The lock pin 66 is fitted in a holder 90 at the lower end of the mounting piece 67 so as to be slidable forward and backward, and is projected forward by a spring 91 to be elastically ejected, and is retracted against the spring 91 by a knob 92 at the rear end. Can be made.

The handle bracket 8 is formed in a gate shape in a front view, and the left and right side portions 35 are connected to each other by a connecting plate 33 at a rear end thereof, and are formed into an arc-shaped curved surface around the pin 64. ing. The pin holes 32 into which the lock pins 66 are engaged are arranged at regular intervals along the curved surface of the connecting plate 33, and are projected and engaged by the spring 91 elastically.

The vertical engagement and height of the steering wheel 7 are determined by the selective engagement of the lock pin 66 with the pin hole 32. When the lock pin 66 is to be removed from the pin hole 32, the operator may extend his hand from the handle 7 and pull the knob 92 rearward.
6 is retracted, the handle 7 is unlocked, and can be freely rotated up and down, so that the mounting height of the steering handle 7 can be changed.

The change lever 11 is located on the front side of the steering handle 7 and can be operated along the lever guide 68 by connecting the front end portion of the lever arm 69 via a horizontal axis 70 and a vertical axis 71. The bracket 8 is provided so as to be swingable vertically and horizontally. At the rear end of the lever arm 69, there is an arm 72 having a pin groove formed.
2, the shift shifter 48 from the upper side within the vertical turning range.
The pin 74 of the shifter arm 73 that rotates around the arm shaft 86 in conjunction with is positioned, and the pin 76 of the shifter arm 75 that links the switching shifter 56 is positioned from below. By rotating the speed change lever 11 back and forth about the horizontal axis 70, the arm 72 is fitted to the pin 74 of the shifter arm 73, so that the shift lever 11 is further rotated in the left-right direction about the vertical axis 71 to change the traveling speed. Moreover, by rotating the arm 72 in the left-right direction by fitting the arm 72 to the lower pin 76, the rotary rotation can be switched between normal rotation and reverse rotation.

Reference numeral 77 is an arm stay for laterally movably guiding the intermediate portion of the shifter arm 75.
The shifter arm 75 and the shifter rod 78 of the switching shifter 56 can be connected to each other by a pin 79 outside the rotary transmission case 2. Moreover,
A long hole 8 is formed in the shifter arm 75 through which the pin 79 is inserted.
0 is formed so that even if the mounting position or the angle of the rotary transmission case 2 with respect to the wheel transmission case 1 is slightly changed, it can be absorbed and the shifter operation can be interlocked.

On the upper side of the bracket 8 as described above, an operation panel 81 made of synthetic resin is fitted and attached by bolts or the like. A lever guide 68 is formed in a central portion of the operation panel 81, and a front speed change groove 82 is at a speed change position, and a reverse position N is provided from a low speed position L in the center to both left and right sides via a neutral position N. The reverse position H is arranged via the.
Further, in the switching groove 83 on the rear side, a forward rotation position A and a reverse rotation position B are arranged on both left and right sides via a central position N in the central portion.
The low speed position L of the speed change groove 82 and the neutral position N of the switching groove 83 are connected by a vertical groove 84, and the speed change lever 11 uses the low speed position L as a working traveling speed suitable for work.
Can be operated to the neutral position N of the switching groove 83, and cannot be directly operated to the switching groove 83 from the shift position H or the reverse position R.

Reference numeral 85 is a handle groove formed on the left and right sides of the rear end portion of the operation panel 81, and the height of the base portion of the steering handle 7 can be adjusted. The left and right axles 1
The rotation of the wheel 20 of 9 causes the chain 55 and the sprocket 88 to rotate.
The roll pin 87 on the left and right axles 19 and the stopper 89 projecting from the side surface of the sprocket 88 can be engaged with each other so that the roll pin 87 can be rotated almost once (for example, 300 degrees). That is, the sprocket 88
With respect to the left and right axles 19, the stopper 89 engages with the roll pin 87 and drives the wheel 20 when the sprocket 88 rotates approximately 300 degrees. Therefore, at the rotation angle (range of approximately 300 degrees) at which the stopper 89 and the roll pin 87 are not engaged, each wheel 20 and the axle 19 are rotatable with respect to the sprocket 88, and the turning or running at the end of the work strip is performed. Etc. can be done smoothly.

11 and 12, the difference from the above example is that the plowing pawls 22A arranged on both left and right sides of the rotary transmission case 2 in the central portion are arranged outside the plowing pawls B.
In reverse, the plowing claw 22A plows the soil surface in the upcut direction, and the plowing claw 22B rotates in the downcut direction to plow. In addition, a winding prevention rod 109 parallel to the tilling claw shaft 107 is provided between the claw holder 106 of the tilling claw 22B and the disk cover 108 at the inner end of the tilling claw shaft 107, so Prevents wrapping of straw and grass.

In the transmission case 2, a transmission gear 111, on which the shifter rod 110 is operated, is provided on the input transmission shaft 5 and meshes with a gear 113 on the shaft 112 so that gear shifting can be performed. Further, this gear 113 meshes with the gear 115 on the shaft 114, meshes with the gear 117 on the shaft 116, meshes with the gear 118 on the rotary shaft 21, and the rotary shaft 21 is gear-shifted. 107 is forwardly rotated.

The shaft 116 drives the sprocket 119 on both the left and right sides together with the gear 117, and the chain 122 transmits between the outer periphery of the rotary shaft 21 and the sprocket 121 integrated with the rotatable reverse rotary shaft 120. The left and right reverse rotary shafts 120 to the rotary shaft 21.
It is configured to rotate in reverse with respect to. On the outer circumference of the reverse rotation rotary shaft 120, a reverse rotation tillage claw shaft 122 is provided so as to rotate integrally, and a tiller claw 22A is attached by a claw holder 123. The outer end surface of the reverse tillage claw shaft 122 is
A fixed disk cover 108 is fitted on the plowing claw shaft 107 to prevent intrusion of mud or wound straw. The inner end of the winding prevention rod 109 has the disc cover 108.
Is welded to the outer peripheral surface of.

[Brief description of drawings]

FIG. 1 is a side view.

FIG. 2 is an enlarged side view of a part thereof.

FIG. 3 is a plan view thereof.

FIG. 4 is a rear view thereof.

FIG. 5 is a plan view of an operation panel.

FIG. 6 is a transmission mechanism diagram.

FIG. 7 is a transmission mechanism diagram.

FIG. 8 is a rear view of the handle mounting portion.

FIG. 9 is a side view thereof.

FIG. 10 is a plan view of a rotary cover portion.

FIG. 11 is a front view of a tilling claw part showing another embodiment.

FIG. 12 is a side view thereof.

[Explanation of symbols]

 1 Wheel Transmission Case 2 Rotary Transmission Case 7 Steering Handle 8 Handle Bracket 32 Pin Hole 33 Connection Plate 34 Base 35 Side Side 65 Connection Member 66 Lock Pin

Claims (1)

[Claims] 1. A handle bracket 8 for mounting a steering handle 7 in a gate shape extending left and right is provided on an upper portion of a traveling transmission case 1 having a wheel shaft 19 at a lower portion thereof, and between the left and right side portions 35 of the handle bracket 8. And a connecting plate 33 in which a pin hole 32 for adjusting the handle position is formed, and a connecting portion 65 connecting between the left and right base portions 34 of the handle 7 is provided with a lock pin 66 that is inserted and removed in the front and rear direction. A handle mounting device for a cultivator, which is provided with the lock pin 66 engageable with the pin hole 32 of the plate 33.