JPS6013320Y2 - Mower cutter bar storage device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a cutter bar storage device for a mower.

In various types of mowers, such as disc type and reciprocating type, the cutter bar protrudes laterally outward from the mower frame and becomes an obstacle when turning or driving on the road.

Therefore, the cutter bar is pivoted to the mower frame so that it can freely rotate around the front and rear axes and the vertical axis, and when turning, the cutter bar is lifted up around the front and back axes in conjunction with the overall lifting movement. When driving on the road, it remains in the lifted state,
It is contemplated to pivot the cutter bar from a working position to a rear storage position.

This is very effective, as it increases the cutter bar's ground clearance and improves the left-right weight balance of the entire mower.

However, when retracting, the cutter bar is rotated from the working position to the rear storage position beyond the front-rear axis, so the center of gravity of the cutter bar relative to the front-rear axis moves left and right due to the rotation, so it cannot be hung at the working position. Even in this state, there is a drawback that the cutter bar rotates around the longitudinal axis when the cutter bar is rotated beyond the longitudinal axis toward the rear storage position.

This invention was provided for the purpose of solving these problems, and its features are as follows:
A transmission device is pivoted to the mower frame so as to be able to swing freely around a front and rear axis, and a cutter bar is attached to this transmission device at a working position where the tip protrudes laterally outward, and at a position rearward from this working position. and a mower in which the center of gravity of the cutter bar is rotatably fixed around a vertical axis between the working position and a rear storage position opposite to the axis of the front and rear shafts,
When the cutter bar is stored in the rear storage position, a regulating means is installed on the cutter bar side including the transmission device to prevent the transmission device from rotating around the front-rear axis in the same direction as the upward direction of the cutter bar in the working position. It is located at a point between the mower and the mower body.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
In the drawings to FIG. 3, reference numeral 1 denotes a tractor body, which has a pair of left and right rear wheels 2.

Reference numeral 3 denotes a hydraulic system for lifting and lowering the working machine, which is equipped with a pair of left and right lift arms 4 and is mounted at the rear of the tractor body 1.

Reference numeral 5 denotes a three-point link mechanism, which is comprised of one top link 6 and a pair of left and right lower links 7, each of which is connected to each lift arm 4 via a lift rod 8 at an intermediate portion.

Reference numeral 9 denotes a disc mower which is a traction device attached to the rear of the tractor body 1 via a three-point linkage mechanism 5, and includes a mower machine frame 10.
, transmission device 11, belt transmission mechanism 12, cutter par 1
3. It is equipped with a gauge wheel 14, a safety guard 15, a cutter bar lifting device 16, etc.

Next, the specific structure and operation and effect of each part of this disc mower 9 will be explained separately.

CI) Overall configuration and gauge wheel 14 The mower frame 10 has a top mast 17, a lower link mounting base 18, etc., and is mounted approximately horizontally behind the tractor body 1 by the top link 6 and lower link 7 of the three-point link mechanism 5. A front and rear shaft 19 is attached to one end of the mower frame 10 in the lateral direction.
A transmission 11 is pivoted around it.

As will be described later, the transmission device 11 has a vertically elongated shape including a transmission case section divided into a plurality of parts and a vertical shaft 20 built into the transmission case section, and the mower frame 10 has a height approximately equal to the ground height of the tractor body 1. , with matching heights.

The belt transmission mechanism 12 is arranged horizontally in parallel on the back side of the mower frame 10 so as to interlock and connect the input shaft 21 at the center of the mower frame 10 and the front and rear shaft 19 at the upper end of the transmission device 11. There is.

The input shaft 21 is connected to two and three PTO shafts of the tractor body 1 via a universal joint shaft 22.

A cutter bar 13 extends laterally outwardly from the lower end of the transmission 11;
In the section, there is a working position A that projects laterally outward, and a safety escape position B that is rotated approximately 90 degrees rearward from the working position A.
and a rear storage position C which is rotated approximately 120 degrees rearward about the vertical axis 20.

The cutter par 13 has a bridge body 24 and a grass collecting rod 25 at its inner end.
A grass collecting plate 26 and a grass collecting rod 27 are provided at the outer end, and two rotary disks 29 having a mowing blade 28 pivotably mounted in the middle thereof are arranged.

A truncated conical weeding drum 30 is mounted on the outer one of the two rotating disks 29 so as to be rotatable therewith.

The distance between the weeding drum 30 and the transmission device 11 is approximately the same as the wheelbase distance W between the rear wheels 2 of the tractor body 1.

The gauge wheel 14 is disposed near the inner side of the transmission device 11, and the gauge wheel 14 has a swivel wheel structure,
As shown in FIGS. 4 and 5, a support bracket 31 is rotatably supported by a holding cylinder 33 via a support shaft 32 around a vertical axis, and the holding cylinder 33 is supported by a pair of swing arms 34.
It is fixedly installed between the rear ends of the

The swinging arms 34 are connected to each other by a boss member 35 at the intermediate portion, and the pivot shaft 3 is fitted into the boss member 36.
6, it is pivotally supported by a pair of mounting brackets 37 attached to the lower side of the mower frame 10 so as to be vertically movable.

A bolt 38 and a collar 39 are installed between the front ends of the swing arm 34.
The elastic body 40 is connected to the fixing bracket 41 of the mower frame 10 with nuts 42 and 4.
3, the elastic body 40 is connected to a threaded rod 44 that is inserted in an adjustable manner, so that the elastic force of the elastic body 40 can be arbitrarily adjusted by means of nuts 42 and 43.

The safety guard 15 covers the upper part of the cutter parl 13 and is provided to rotate together with the cutter parl 13.

Note that a cover 45 is attached to the safety guard 45.

When cutting grass, etc., with the gauge wheel 14 and cutter par 13 in contact with the ground as shown by the solid lines in FIGS. 1 to 3, the rotary disc 29 is moved as shown by the arrow in FIG. 1 by power from the tractor body 1. The cutting blade body 28 cuts grass and the like.

In this case, the cut grass, etc. is completely separated from the uncut portion by the grass dividing drum 30, and therefore, a row of grass collection 46 is formed at the cutting site as shown by the imaginary line in FIG.

Since the grass collection row 4 fits within the wheelbase W of the rear wheel 2,
The tractor body 1 only has to run while straddling the grass collection row 46 that was mown last time, and at that time, the grass etc. is attached to the universal joint shaft 22 that connects the PTO shaft 2 and the 3 power shafts 21 of the tractor body 1. There is no chance of the grass getting tangled or causing the mower frame 10 to break the top of the grass collecting row 46.

That is, since the transmission device 11 is vertically elongated and the waist mower frame 10 and belt transmission mechanism 12 are substantially horizontal, the mower frame 10 has a sufficiently high ground clearance and can easily pass over the grass row 46.

Further, since the transmission device 11 and the gauge wheel 14 are offset to one end side in the lateral direction with respect to the mower frame 10 and correspond to the rear side of the rear wheel 2, the lateral position does not matter at all.

During work, the gauge wheel 14 is in contact with the ground and receives the load from the mower frame 10 via the elastic body 40, so it is necessary to suspend the remoter machine frame 10 from the tractor body 1 using a hanging rope or the like. Therefore, the reaping work can be carried out in a stable condition.

In addition, the cutter bar 13 moves along the longitudinal axis 19 along the slope of the ground.
However, since the gauge wheel 14 is elastically supported by the elastic body 40, the load of the mower frame 10 can always be supported on the gauge wheel 40 side, and therefore the following movement of the cutter par 13 is made smoother. Become.

(II) The cutter bar lifting device 1 is arranged so that the cutter bar 13 is moved in conjunction with the lifting and lowering operation of the disc mower 9 by the hydraulic device 3, so that the tip side of the cutter bar 13 is greatly lifted by the movement of the top link 6 at the time of the lift. 13, and is constructed as shown in FIGS. 6 to 11.

That is, in Fig. 6, 47 is an extension rod, and as shown in Figs.
This extension rod 47, with the top link 6 sandwiched between the fork portions 48, is joined together with the ball joint 49 at the rear end of the top link 6 at approximately the center in the longitudinal direction. It is pivotally attached to the upper end of the top mast 17 by a mounting pin 50.

The front ends of the forked parts 48 of the extension rods 47 are connected to each other by a U-shaped abutting tool 51, and the abutting tool 51 connects to the top link via a vibration isolating material 52 such as rubber attached to the abutting tool 51. 6 from below in the approximate center in the longitudinal direction.

The top link 6 has a cylindrical turnbuckle main body 53 and a pair of screw shafts 54 of a reverse screw structure screwed into the turnbuckle main body 53, and a contact tool 51 is provided near the approximate center of the turnbuckle main body 53. to touch.

The extension rod 47 has a connection point 55 on the rear extension of the top link 6.
A lifting cable 56 is connected to the connection point 55.

The lower end of the lifting cable 56 is connected to a bell crank 57, and the bell crank 57 is connected to a support shaft 59 on a fixing bracket 58 erected approximately at the center of the mower root 10, as shown in FIGS. 10 and 11. The transmission device 1
1 is connected to a protrusion 63 at the upper end.

That is, the connector 62 is U-shaped and has a protrusion 63 on the open side.
One end of the connecting rod 60 is slidably inserted into the connecting tool 62.

The elastic body 61 is fitted onto the connecting rod 60 between the connecting member 62 and nuts 64 and 65 screwed onto the connecting rod 60.

The length of the lifting cable 56 is such that it is slightly slack when the cutter par 13 is in a working position resting on the ground.

During work, the cutter par 13 rests on the ground at the work position A, and the front and rear axis 19 follows the undulations of the ground.
Move up and down around.

That is, at this time, there is some slack in the lifting cable 56 and the elastic body 61 is in a free length state, so the cutter par 13 can freely float up and down within that range and reliably follows the undulations of the ground. can.

When turning, etc., the hydraulic device 3 is operated in the upward direction, and the lift arm 4 lifts the entire disc mower 9 via the three-point linkage mechanism 5. At this time, the cutter blade of the disc mower 9 13 performs a rising operation as shown in FIG.

That is, since the mower frame 10 is attached to the tractor body 1 by the three-point linkage mechanism 5, the solid line shown in FIG.
As shown by the one-dot chain line and the two-dot chain line, it rises in parallel while remaining in a substantially horizontal state.

At this time, the contact tool 51 at the front end of the extension rod 47 is connected to the top link 6.
Since the top link 6 and the extension rod 47 rotate together in a substantially straight line, the relative angle θ with the mower frame 10 becomes smaller as the top link 6 and the extension rod 47 rise, and the extension rod 47 is extended. The rear end of the rod 47 pulls the lifting cable 56 upward (indicated by arrow a).

However, since there is some slack in the lifting cable 56, the inner end of the cutter par 13 is not connected to the mower frame 10 at the beginning of the ascent.
The cutter par 13 rotates relatively around the front-rear axis 19, and the tip side remains in contact with the ground as shown by the solid line in FIG. 12.

When the elastic body 61 is compressed, the cutter par 1
3 starts climbing at a faster speed than the mower frame 10.

That is, the cutter par 13 rises together with the mower frame 10, and at the same time moves around the front and rear shaft 19 from the extension rod 47 via the lifting cable 56, the bell crank 57, the connecting rod 60, the elastic body 61, the connecting tool 62, and the transmission device 11. Since it receives a lifting force in the direction of arrow b, it sequentially rotates in the direction of arrow b as the whole moves up.

When the mower frame 10 rises to the one-dot chain line position, the cutter bar 13 rises to a substantially horizontal state, and when it rises to the two-dot chain line position, the cutter bar 13 tilts so that the tip side is upward, contrary to the initial position at the beginning of the rise. It becomes a tip-up shape.

Therefore, the ground clearance on the tip side of the cutter bar 13 is sufficiently large, making it easy to turn.

Cutter bar 1, especially when turning on rough terrain, etc.
Even when the rear wheel 2 on the opposite side of the cutter 3 rides on a raised part, the tip side of the cutter par 13 does not become abnormally low and come into contact with grass or the like.

Although it is conceivable that the extension rod 47 is integrated with the top link 6, if it is made separate from the top link 6 as in the embodiment and is detachably attached using the mounting pin 50, the extension rod 47 can be integrated with the top link 6. can be easily adopted.

Furthermore, the abutting tool 51 at the front end of the extension rod 47 is in contact with approximately the center in the longitudinal direction of the top link 6, and the mounting pin 50 and the abutting tool 51
Since the dimension E between them is approximately the same or larger, the load on the cutter bar 13 side is not amplified more than necessary and acts on the top link 6, and the abutting tool 51 is cylindrical. Since the top link 6 is in contact with the center of the turnbuckle main body 53, there is no risk that the top link 6 will bend due to the load on the cutter bar 13 side.

Note that the contact position of the contact tool 51 with respect to the top link 6 is as follows.
From the relationship of the link ratio, it is preferable to be farther away from the mounting pin 50, and therefore, it is also possible to configure it in a hook shape so as not to interfere with the handle 66 of the turnbuckle main body 53.

Further, the top link 6 and the extension rod 47 do not necessarily have to be in a straight line, and the extension rod 47 may be configured in a dogleg shape.

An elastic body 61 is interposed between the connecting rod 60 and the connecting tool 53, and the cutter bar 13 is supported via the elastic body 61, so that the cutter bar 13, cutter bar lifting device 16, etc. This prevents impact force from acting, making the lifting and lowering operations extremely smooth.

In particular, the cutter par 13 is pivotally supported on the inner end side,
Since the amount of lateral protrusion is extremely large, if the tractor body 1 swings up and down even slightly due to reasons such as the rear wheels 2 running onto a stone, a strong impact will be applied to the support part of the cutter par 13. However, by interposing the elastic body 61, the impact can be sufficiently absorbed and alleviated.

(III) Belt Transmission Mechanism 12 The belt transmission mechanism 12 is for interlockingly connecting the input shaft 21 and the front-rear shaft 19 at the upper end of the transmission device 11.
It is constructed as shown in the figure and FIG. 13.

The input shaft 21 is rotatably inserted into a bearing case 67 at the center of the mower frame 10 via ball bearings 68 and 69. A universal joint shaft 22 is connected to the front end of the input shaft 21, and a universal joint shaft 22 is connected to the rear end of the input shaft 21. The rotary cylindrical body 72 is fitted around the rotary cylindrical body 72 through ball bearings 70, 71 so as to freely rotate, and a unit is installed between the input shaft 21 and the rotary cylindrical body 72 so as to transmit power only from the input shaft 21. A directional clutch 73 is incorporated.

74 is a driving pulley attached to the rotating cylinder 72, 75 is a driven pulley fixed to the front and rear shaft 19, and these boots IJ7
A plurality of belts 76 are stretched between 4.75 and 75.

Reference numeral 77 denotes a tension pulley that presses the tension side of the belt 76 downward, and is supported by a tension arm 79 that is swingably supported on the mower frame 10 via a support shaft 78.
The tension arm 79 is attached to the belt 76 by an elastic body 80.
The ball is supported in the direction of pressing.

Note that the elastic body 80 can be arbitrarily adjusted by a tension adjustment mechanism 174 consisting of an adjustment bolt 81 and a nut 82.

83 is an inner cover, 84 is a pulley 74, 75 and a belt 7.
6, these are the mounting nuts 85,
It is attached to the mower frame 10 at four locations using attachment bolts 86 and wing nuts 87.

That is, the mounting nuts 85, mounting bolts 86, etc.
The mounting nuts 85 are fixedly mounted on the mower frame 10 side.

Each mounting bolt 86 has a shaft part 88 for ensuring spacing like a distance collar, and a pair of threaded parts 89 and 90 formed at both ends, and the shaft part 88 can be used with a tool such as a spanner. It is formed in a hexagonal shape so that it can be fitted.

The inner cover 83 is clamped and fixed between the mounting nut 85 and the end face of the shaft rod part 88 by screwing the threaded part 89 of the mounting bolt 86 into the mounting nut 85. The wing nut 87 is screwed into the threaded portion 90, and is clamped and fixed between the end face of the shaft portion 88 and the wing nut 90.

When the disc mower 9 is driven, the power from the tractor body 1 is transmitted from the universal joint shaft 22 to the input shaft 21, the one-way clutch 73, the rotating cylinder 72, the drive pulley 74, the belt 76,
The tension of the belt 76 is transmitted to the front and rear shaft 19 of the transmission device 11 via the driven pulley 75.
It is kept almost constant by 7 mag.

When the disc mower 9 is lifted during reaping work, the rotating disc 29 rotates due to inertia, and the power is reversely driven via the driven boob IJ 75, belt 76, driving pulley 74, and rotating cylinder 72. This power is cut off by the one-way clutch 73, and the input shaft 21 is not driven, so that no transmission noise is generated in the universal joint shaft 22 due to reverse drive.

Furthermore, even when the zero clutch is disengaged, the PTO shaft system is not reversely driven.

When installing the inner cover 85 and belt cover 84,
Since the mounting bolt 86 is equipped with a shaft part 88 for maintaining the distance and a pair of screw parts 89 and 90, the inner cover 8
3 and the belt cover 84 is unnecessary, and the structure can be greatly simplified.

Further, even when the wing nut 87 is loosened and the belt cover 84 is removed, the mounting bolt 86 will not loosen and the inner cover 83 will not come off, making it easy to remove the belt cover 84 and inspect it.

The pulleys 74, 75 and the belt 76 rotate in the direction of arrow C, but since there is a mounting bolt 86 located near the side of the pulleys 74, 75 that wraps around the belt 76, remove the belt cover 84. When inspecting, remove the mounting bolt 86.
The belt 76 functions to prevent entanglement, and even if the belt 76 comes into contact with the belt 76, grease or clothes will not be entangled, so inspections, etc. can be carried out safely.

Note that it is also possible to implement the present invention in a similar manner with systems other than the belt transmission mechanism 12.

(IV) Transmission device 11 As shown in FIG. 14, the transmission device 11 is disposed between the outer end of the mower frame 10 in the horizontal direction and the inner end of the cutter bar 13, and is configured in a vertically elongated shape. As described later, this transmission device 11 connects the cutter bar 13 to the mower frame 10.
and a function of transmitting power from the belt transmission mechanism 12 to each rotating disk 29 on the cutter bar 13.

In FIGS. 14 and 15, reference numeral 91 denotes an upper gear case, on which a cylindrical shaft 92 and a bearing case 93 are mounted on both front and rear sides, and a pair of holding cylinders 95 that fit onto the cylindrical shaft portion 94 of the cylindrical shaft 92 and bearing case 93. is supported so as to be swingable around the front-rear axis 19.

The holding tubes 95 each include a mounting bracket 96, and are attached to a mounting frame 97 having a U-shape in plan and fixed to the outer end of the mower frame 10.

The front and back shaft 19 is rotatably fitted into a bearing case 93 via ball bearings 98 and 99, and the front and rear shaft 19 has a driven pulley 75 at its rear end and a bevel gear 100 at its inner end.

The bevel gear 100 meshes with the bevel pinion 101,
The bevel pinion 101 is rotatably fitted into the lower opening 102 of the upper gear case 91 via a pole bearing 103, and the upper end of the vertical shaft 20 is spline-fitted into the bevel pinion 101.

A holding case 104 is integrally flanged to the lower end of the upper gear case 91 by a plurality of ports 106 in the circumferential direction.

106 is an intermediate case, and a bushing 1 is attached to the holding case 104.
An oil seal 108 is inserted into the upper end of the intermediate case 106 so as to be freely rotatable around the vertical shaft 20 from below via a bevel gear 103. At the same time, the retaining ring 109 is attached with a bolt 110.

The retaining ring 109 is attached to the seal holding portion 111 of the intermediate case 106.
The outer periphery of the retaining ring 109 protrudes outward from the intermediate case 106 and is positioned relative to the stepped portion 112 formed on the inner periphery of the upper end of the holding case 104. The intermediate case 106 is rotatably engaged, so that the intermediate case 106 cannot be detached from the holding case 104.

The retaining ring 109 includes a cylindrical portion 113 that is concentric with the vertical shaft 20 and protrudes upward, and the cylindrical portion 113 rotates relative to the lower opening 102 to facilitate centering with the upper gear case 91. It fits freely inside.

Also, between the upper and lower opposing surfaces of the retaining ring 109 and the intermediate case 106, and between the cylindrical portion 113 and the lower opening 102 of the upper gear case 91,
O-rings 114, 115 are interposed between the O-rings 114, 115 and the oil seal 10, respectively.
8 prevents the lubricating oil 116 in the upper gear case 91 from leaking to the intermediate case 106 side.

A lower end portion of the vertical shaft 20 is rotatably inserted into the lower end portion of the intermediate case 106 via a bearing holding portion 117 and a ball bearing 118.

Reference numeral 119 designates a lower gear case integrally formed at the inner end of the cutter par 13, and includes a bearing holding portion 1 at the lower end of the intermediate case 106.
17 and is integrally connected to the intermediate case 106 by a plurality of bolts 120 in the circumferential direction, and inside this lower gear case 119 are bearing cases 121 on both left and right sides.
, 122 and the horizontal shaft 12 via the ball shafts 123 and 124.
5 is rotatably mounted on an axis.

The horizontal shaft 125 is substantially parallel to the longitudinal direction of the cutter par 13, and has a bevel gear 127 that engages with a bevel gear 126 at the lower end of the vertical shaft 20, and also has a gear 128.
The gear 128 meshes with a gear 130 at the inner end of a drive shaft 129 mounted within the cutter par 13.

The drive shaft 129 is interlocked with each rotary disk 29 via a bevel gear mechanism or the like.

Among the two bearing cases 121 and 122, bevel gear 1
The bearing case 121 on the side that receives the thrust load acting on the horizontal shaft 125 from 27 is fastened to the lower gear case 119 with bolts 131, and the bearing case 122 on the opposite side to the thrust load is fixed to the lower gear case 119 with a retaining pin 132. In addition, a Hall bearing 124 is fitted therein so as to be relatively slidable in the axial direction.

That is, the bearing case fitting portion 13 of the lower gear case 119
3 has a radial pin hole 134 formed therein as shown in FIG. A conical engagement recess 135 is formed, and a retaining pin 132 is inserted into and removably into the bottle hole 134 and the engagement recess 135.

As shown in FIG. 16, the retaining pin 132 has its upper end aligned with the bottle hole 1.
34, and has a small-diameter protrusion 137 at the protruding end via a step 136, and one of the steps 136
It is pressed downward by a leaf spring-like elastic body 138 that comes into contact with the.

The elastic body 138 is detachably attached to the lower gear case 119 at both ends with two bolts 139, and is provided with a long hole 140 in the center thereof into which the protrusion 137 of the retaining pin 132 engages.

On the other hand, the inner circumferential surface of the bearing case 122 is formed into a sliding surface 141, and the outer ring of a ball bearing 124, which is fitted onto and fixed to the horizontal shaft 125, is slidably inserted in the sliding surface 141 in the axial direction. It is fitted.

Therefore, structurally, the thrust load of the horizontal shaft 125 does not act on the bearing case 122 at all.

Reference numeral 142 denotes an external case, which is fitted onto the holding case 104 through a bushing 143 so as to be relatively rotatable.The cutter par 13 is placed at the upper end side of the external case 142 and the holding case 104 in a working position. A positioning device 144 for positioning at the rear storage position C is incorporated,
Furthermore, a safety device 145 is incorporated into the lower end sides of the outer case 142 and the intermediate case 106 to rotate the cutter par 13 from the working position A to the safe speed position B when the cutter par 13 comes into contact with an obstacle. It is.

As shown in FIGS. 17 to 19, the positioning device 144 moves the holding case 104 within the range of the U-shaped connecting rod 97.
an overhanging portion 146 protruding radially outward from the outer case 142; an overhanging edge 147 opposing the overhanging portion 147 protruding radially outward from the outer case 142; and a bottle formed on the overhanging portion 146. Hole 14
8 and the bottle hole 14 at each position A and C of the cutter par 13.
two bottle holes 149 and 150 formed in the overhanging edge 147 to coincide with the pin holes 149 and 150;
1. Prepare and warn.

A hard collar 152 is fitted into each bottle hole 148, 149, and 150 to prevent the bottle from collapsing.

The positioning pin 151 is positioned within the U-shaped range of the connecting frame 97, and the small diameter L-shaped gripping rod 153
The straight rod portion thereof is inserted into a guide plate 154 attached to the side surface of the upper gear case 91 so as to be vertically movable, and is biased downward by a coiled elastic body 155.

The guide plate 154 is provided with a locking portion 156 that protrudes radially outward from the upper portion, and the positioning pin 15 is attached to the locking portion 156.
The first gripping rod 153 can be freely engaged and detached by its rotation, and the positioning pin 151 can be locked in the extracted position by the locking portion 156.

Stoppers 1 are provided on both end faces in the circumferential direction of the overhanging edge 147 to abut against the overhang 146 at each position A and C of the cutter par 13.
57 and 158 are attached with bolts.

Further, the stopper 158 is integrally provided with an engaging portion 159 formed by bending its upper end portion outward in the radial direction. An L-shaped retaining portion 160 that is engaged with the engaging portion 159 when rotated to the rear storage position C is fixedly provided.

That is, when the cutter par 13 is rotated toward the rear storage position C, the engaging portion 159 engages with the engagement tool 160 to prevent the cutter par 13 from rotating around the front-back axis 19. It is configured as follows.

Note that the engaging portion 159 and the engaging member 160 constitute a regulating means.

As shown in FIGS. 20 and 21, the safety device 145 includes a protrusion 161 that protrudes radially outward from the lower end of the outer case 142 and a protrusion 161 that protrudes radially outward from the lower end of the intermediate case 106. A circular arc-shaped projecting edge 162 is provided, and a bottle hole 163 is formed in the projecting portion 161 and the projecting edge 162 so as to match when the cutter par 13 is positioned at the working position A.
164 and shear pin bolts 165 inserted into the pin holes 163, 164 and fastened, and the intermediate case 1
Mounting plates 166 for the safety guard 15 are attached to the lower part of the safety guard 15 in parallel to each other on both the front and rear sides, and the mounting plates 16
Reference numeral 6 also serves as a stopper for restricting the rotation of the cutter par 13 to a range between the working position A and the safety relief position B, and is configured to be able to come into contact with the projecting portion 161 of the outer case 142, respectively.

The safety guard 15 is supported by a pillar 167, and the pillar 167 is fixed to a mounting rod 172 supported between a pair of mounting plates 166, so that it can always rotate together with the cutter par 13.

Note that lubricating oil 168 is stored in the lower gear case 119 up to about the horizontal shaft 125, and 169 is a bearing stand that supports the inner end of the drive shaft 129 via a ball bearing 170. Installed from the bottom.

In the above configuration, the power transmitted to the front and rear shafts 19 via the belt transmission mechanism 12 during reaping work is transmitted to the bevel gear 1
After being transmitted to the vertical shaft 20 via the bevel pinion 101, the bevel gear 126, 1 is transmitted from below the vertical shaft 20.
27, the horizontal shaft 125, and the gears 128 and 130 to be transmitted to the drive shaft 129.

In other words, the power is transmitted to the upper side of the transmission device 11 via the belt transmission mechanism 12 and transmitted downward by the vertical shaft 20 inside the belt transmission mechanism 12 to drive the drive shaft 129 in the cutter par 13.
The belt transmission mechanism 12 can be provided horizontally in parallel with the mower frame 10, so that the ground clearance below the mower frame 10 can be increased as described above.

During work, the positioning pin 151 is inserted into the pin hole 148, with the stopper 157 of the outer case 142 in contact with the protrusion 146 of the holding case 104, as shown in FIG.
149, and the cutter par 13 is fixed at the working position A by this positioning pin 151.

Therefore, when the cutter par 13 is to be driven on the road after the work is completed, the cutter par 13 is rotated from the working position A to the rear storage position C, as shown in FIG. 19, and then stored in the rear storage position C.

In this case, first the positioning pin 151 is attached to the elastic body 155.
the bottle hole 14 of the external case 142.
After removing it from No. 9; rotate the gripping rod 153 to remove No. 17
It is locked to the locking portion 156 of the guide plate 154 as shown by the imaginary line in the figure.

Next, hold the roadside side of cutter par 13 and move it slightly backwards d
Rotate in the direction of the arrow to insert the positioning pin 151 into the pin hole 14.
9 from the corresponding position, and when the positioning pin 151 is removed from the bottle hole 149, the gripping rod 153 is removed from the locking part 156, and the positioning pin 151 is brought into contact with the upper surface of the projecting edge 147 of the outer case 142 by the elastic body 155. Then, holding the roadside side of the cutter par 13, rotate the cutter par 13 about the vertical axis 20 in the direction of arrow d to the rear storage position C.

Then, when the cutter par 13 reaches the rear storage position C, the stopper 158 touches the protrusion 146 of the holding case 104.
At the same time, the bottle hole 149 contacts the positioning pin 151.
, the positioning pin 151 is lowered by the elastic force of the elastic body 155 and fitted into the bottle hole 149, thereby fixing the cutter par 13.

If the cutter par 13 is stored in the rear storage position C,
When traveling with the entire disc mower 9 lifted, the left and right weight balance is better than when it is left in the working position A.

In particular, since the rear storage position C is rotated more than 90 degrees from the working position A, the cutter par 13 itself is in an inclined position behind the tractor body 1, so the bridge body is placed on the front side of the cutter par 13. 24. Even though the rotating disk 29 and the like are in a protruding state, they do not protrude laterally outward from the tractor body 1, which is very safe, and the center of gravity of the cutter par 13 is aligned with the tractor body 1. 1, and the left and right weight balance is even better.

When the entire disc mower 9 is lifted and the cutter par 13 is rotated to the rear storage position C, the center of gravity of the cutter par 13 is moved inward beyond the longitudinal axis 19 because it is rotatable around the longitudinal axis 19. When moving, the cutter par 1
3 attempts to rotate inward around the front-back axis 19, but at this time, the engaging portion 159 of the stopper 158 has already engaged with the engaging tool 160, as shown in FIG. Since the joint portion 159 slides on the engagement tool 160 to the rear storage position C, inward rotation of the cutter par 13 can be prevented.

Typically, the outer case 142 and the intermediate case 106 are the 20th
As shown in the figure, it is fastened with a shear pin bolt 165.

Therefore, when the cutter par 13 comes into contact with wood, stone, etc. during work, and a load greater than the strength of the shear pin bolt 165 is applied around the shaft 20, the shear pin bolt 165 is sheared and the connection between the intermediate case 106 and the outer case 142 is broken. The cutter 13 side of the intermediate case 106 and the like moves around the vertical axis 20 in the direction of arrow d as shown in FIG.
to prevent damage to each part.

When the cutter par 13 reaches the safe escape position B, the mounting plate 166 comes into contact with the protrusion 161 of the outer case 142 and is regulated.

In this case, the safety escape position B is a position rotated 90 degrees from the working position A, and the amount of relief of the cutter par 13 is set large, so that the tractor body 1 cannot be moved after the cutter par 13 contacts an obstacle. There is plenty of time to stop it.

The axis of rotation for storage and safety of the cutter par 13 is the vertical axis 20 of the transmission device 11, and its case part is the holding case 10.
4. The triple structure of the intermediate case 106 and the outer case 142 greatly simplifies the support structure for the pivot portion of the cutter bar 13, and is extremely effective in making the entire structure more compact.

In addition, the retaining case 104 and the intermediate case 106 are connected to each other by the retaining ring 1.
09, and the holding case 104 is removably bolted to the upper gear case 91, ensuring that the intermediate case 106 is prevented from coming off, and also making it easy to assemble them.

In addition, the retaining ring 109 fits into the seal retaining portion 111 of the intermediate case 106 and the lower opening 102 of the upper gear case 91, respectively, and also functions for centering, so that the assembly accuracy is good.

Also, a retaining ring 109 is used for sealing the upper gear case 91.
, the seal structure between the upper gear case 91 and the intermediate case 106 is simple and reliable, and the lubricating oils 116 and 168 can be stored independently in the upper gear case 91 and the lower gear case 109, respectively. can.

Of the bearing cases 121 and 122 that support the horizontal shaft 125,
The inner periphery of the bearing case 122 on which no thrust load is applied is a sliding surface 141, into which the ball bearing 124 is fitted so as to be able to slide freely in the axial direction. There is no need to form a positioning part, and vibrations of the horizontal shaft 125 can be absorbed by the relative sliding between the ball bearing 124 and the bearing case 122. It is sufficient to fix it.

Therefore, the structure can be greatly simplified compared to the case where the bearing case 122 is attached with bolts, and at the same time, when disassembling, one bolt 139 is removed and the protrusion 137 is inserted into the elongated hole.
40, then remove the elastic body 138 from the other bolt 139.
Since the retaining pin 132 can be removed by a simple method such as rotating it, disassembly and assembly are easy for inspection and the like.

Note that if the tip of the retaining pin 132 and the engagement recess 135 are tapered, the retaining pin 132 and the bearing case 12
It is possible to eliminate play between the two.

In the embodiment, the upper end of the stopper 158 is bent to form a retaining portion 159 for the regulating means, but this may be formed separately.

Further, a locking tool 160 is provided on the mounting frame 97, and this locking tool 16
Although the engaging part 159 is engaged with the upper end of the mounting frame 97, it is also possible to extend the retaining part 159 upward and engage directly with the upper end of the mounting frame 97. Therefore, the regulating means can have various structures. The invention is not limited to the examples.

In the present invention, when the cutter parr 13 is stored in the rear storage position C, the regulating means prevents the transmission device 11 from rotating around the longitudinal axis 19 in the same direction as the upward direction of the cutter parr 13 at the working position A. 159 and 160 are provided between the cutter bar 13 side including the transmission device 11 and the mower body 10, so that the transmission device 1
A cutter bar 13 is attached to this transmission device 11 so as to be swingable around a front-rear axis 19, and a cutter bar 13 is attached to the transmission device 11 at a working position A where the tip protrudes laterally outward, and at a position rearward from this working position A and a cutter bar 13. Although the center of gravity of the bar 13 is rotatably fixed on the vertical axis of 20 m between the working position A and the rear storage position C on the opposite side with respect to the axis of the front-rear shaft 19, Rotation of the cutter bar 13 at the storage position C can be prevented, and therefore the cutter bar 13 can be stored easily and reliably.

Further, since the rotation range of the cutter bar 13 around the vertical axis 20 can be increased, the cutter bar 13 can be reliably stored at the rear.

[Brief explanation of the drawing]

The drawings illustrate one embodiment of the present invention.
The figure is an overall plan view, Figure 2 is a side view of the same, Figure 3 is a rear view of the same, Figure 4 is a cutaway side view of the gauge wheel support, and Figure 5 is a view taken along the ■-■ arrow in Figure 4. , Fig. 6 is a side view of the attachment part, Fig. 7 is an enlarged sectional view of the top link part, and Fig. 8 is a side view of the mounting part.
■The arrow view, Figure 9 is the IX-IX arrow view of Figure 7, and the 10th
The figure is a broken rear view of the belt transmission mechanism, and Figure 11 is the 10th
A view taken along arrows XI-XI in the figure, FIG. 12 is an explanatory diagram of the lifting and lowering operation, FIG. 13 is a cross-sectional plan view of the belt transmission mechanism, FIG. 14 is a rear view of the transmission device, and FIG. 15 is a cross-sectional view of the same. Fig. 16 is an enlarged sectional view of the bearing case fixing part, Fig. 17 is an enlarged broken view of the positioning device, Fig. 18 is a broken plan view of the same, Fig. 19 is an explanatory view of the same operation, and Fig. 20 is of the safety device part. The cross-sectional plan view and FIG. 21 are explanatory diagrams of the same operation. 1... Tractor body, 5... Three-point link mechanism, 6... Top link, 9...
Disc mower 10...Mower machine frame, 11.
......Transmission device, 12...Belt transmission mechanism, 13...Cutter bar, 14...Gauge wheel, 16...Cutter par lifting device , 19
...Anteroposterior axis, 20...Vertical axis, A...
...Working position, B...Safety escape position, C...
... Rear storage position, 29 ... Rotating disk,
40,61,138...Elastic body, 47...
... Extension rod, 51 ... Contact tool, 55 ...
・Connection point, 56... Hanging rope, 60...
Connecting rod, 62...Connector, 74...
・Drive pulley, 75... Driven pulley, 76...
...Belt, 83...Inner cover, 84...
...Belt cover, 86...Mounting bolt,
88...Shaft rod part, 89,90...Thread part, 91...Upper gear case, 104...
...Holding case, 106...Intermediate case, 10
9...Keeping ring, 119...Lower gear case, 121, 122...Bearing case, 125
...Horizontal axis, 132 ... Retention pin, 13
4...In hole, 135...Engagement recess, 1
44...Positioning device. 14...Safety device, 151...Positioning pin, 157,158...Stopper, 15
9...Engagement part, 160...Engagement tool, 1
65...Sharpin bolt, 166...
・Mounting plate.

Claims (1)

[Scope of utility model registration request] A transmission device 11 is pivotally supported to the mower frame 10 so as to be able to swing freely around a longitudinal axis 19, and a cutter bar 13 is attached to the transmission device 11 at a working position A where the tip thereof protrudes laterally outward. Behind working position A and cutter bar 1
3, the center of gravity of the cutter is rotatably fixed around a vertical axis 20 between the working position A and a rear storage position C on the opposite side with respect to the axis of the front-rear shaft 19; A regulating means 1 that prevents the transmission device 11 from rotating around the longitudinal axis 19 in the same direction as the upward movement of the cutter bar 13 at the working position A when the bar 13 is stored in the rear storage position C.
59, 160, the cutter bar 1 including the transmission device 11;
3 side and a mower body 10.