JPS6036242B2 - Mower cutter bar lifting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mower cutter bar lifting device.

Mowers such as disc mowers and reciprocating mowers have an inner end of a cutter bar attached to one end of a mower frame so that the cutter bar protrudes laterally outwardly from the mower frame.

If such a mower is configured to raise and lower the cutter bar horizontally, the cutter bar will not be able to follow the undulations of the ground during operation, since it must be impossible to lower the cutter bar from a horizontal position. The grass was cut at different heights, and the cutter blade was strained, which caused the machine to malfunction. Therefore, in the working posture, the cutter bar follows the ground and moves up and down within a certain range.
It is also possible to pivot the cutter bar to the mower frame, but in this case, the tip side of the cutter bar will sag when raised, making it impossible to obtain sufficient ground clearance. In view of these conventional problems, the present invention utilizes the movement of the top link of the three-point linkage mechanism to ensure the cutter bar's ground clearance during lifting and lowering, and its features include: It is attached to the rear end of the top link and lower link that make up the three-point link mechanism on the mobile aircraft side via a pivot joint, and can be raised and lowered with respect to the mobile aircraft via the three-point link mechanism. In a mower equipped with a mower frame and a cutter bar pivotally attached to the mower frame so as to be swingable about a front and rear axis, a connection point that projects rearward from the pivot point between the top link and the mower frame. A punch having a punch is provided so as to be movable up and down integrally with the top link when the mower frame is raised and lowered, and the connecting point and the cutter bar side are connected via a connecting means. Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. In FIGS. 1 to 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 composed 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. 9 is a three-point linkage mechanism 5 at the rear of the tractor body 1.
It is a disc mower that is pulled by a traction device via a mower frame 10, a transmission device 11, a belt transmission mechanism 12, a cutter bar 13, 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.

[1] 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 to the rear of the tractor body 1 by the top link 6 and lower link 7 of the three-point linkage mechanism 5. A longitudinal 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 portion divided into a plurality of parts and a vertical shaft 20 built therein, and the mower frame 10 is approximately equal to the ground height of the tractor body 1. It has a height that matches that of the The belt transmission mechanism 12 is connected to the mower frame 1 so as to dynamically connect the central input shaft 21 of the mower frame 10 and the front-rear shaft 19 at the upper end of the transmission device 11.
They are arranged horizontally on the back side of 0. The input shaft 21 is connected to a PTO shaft 23 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, and the cutter bar 13 extends laterally outwardly in the transmission 11 portion from a working position A projecting laterally outwardly and from the working position A approximately It is rotatable around the vertical axis 20 between a safety escape position B that is rotated 90 degrees rearward and a rear storage position C that is rotated approximately 120 degrees rearward. Cutter
The bar 13 has a body 24 and a grass collection pestle 25 in its inner weave, a grass collection plate 26 and a grass collection pestle 27 in its outer end, and a cutting blade body 28 swingably pivoted in the middle thereof. rotating disks 29 are arranged. and two rotating disks 2
A truncated conical weeding drum 30 is mounted on the outer rotary disk 29 of the drum 9 so as to be rotatable therewith. The distance L between the weeding drum 30 and the transmission device 11 is approximately the same as the wheel 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, and as shown in FIG. 4 and FIG. The holding cylinder 33 is rotatably supported around a vertical axis by a holding cylinder 33, and the holding cylinder 33 is fixed between the rear ends of a pair of swing arms 34. The swinging arms 34 are connected to each other by a boss member 35 at the intermediate portion, and a pair of mounting brackets 37 attached to the lower side of the mower frame 10 are connected to each other by a pivot shaft 36 inside the boss member 35. It is pivoted up and down freely. A bolt 36 and a collar 3 are installed between the front ends of the swing arm 34.
An elastic body 40 is connected via 9, and this elastic body 40
Attach the nut 42 to the fixing bracket 41 of the mower frame 10,
The elastic body 40 is connected to a screw punch 44 which is adjustable through a screw 43, and therefore the elastic force of the elastic body 40 can be arbitrarily adjusted using nuts 42 and 43. The safety guard 15 covers the upper part of the cutter bar 13, and is provided so that the cutter bar 13 rotates together with the cutter bar 13. Furthermore, safety guard 1
A cover 45 is attached to 5. When cutting grass, etc., the rotary disk 29 is moved by the power from the tractor body 1 as shown by the arrow in FIG. 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. Grass collecting row 46 is rear wheel 2
Therefore, the tractor body 1 only needs to travel while straddling the grass collection row 46 that was mowed last time, and at that time, the grass etc. will fall on the PTO shaft 23 of the tractor body 1.
There is no possibility that the mower machine frame 10 will become entangled with the flexible support shaft 22 connecting the input shaft 21 and the input shaft 21, or that the top of the grass collection row 46 will be destroyed by the mower frame 10. That is, since the transmission device 11 is configured to be vertically long and the mower frame 10 and belt transmission mechanism 12 are approximately horizontal, the ground clearance of the mower frame 10 is sufficiently large and the mower frame 10 can easily pass over the grass row 46. . Further, since the transmission device 11 and the gauge 14 are offset to one end 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 on the rear side and receives the load from the mower frame 10 via the elastic body 40, so it is necessary to suspend the mower frame 10 from the tractor body 1 using a hanging element or the like. It is possible to perform the reaping work in a stable condition. Further, the cutter bar 13 follows and swings around the front-rear axis 19 along the slope of the ground, but the load of the mower frame 10 can be supported on the gauge wheel 40 side, so that the follow-up operation of the cutter bar 13 becomes smoother. [0
] Cutter bar lifting device 16 This is moved by the lifting and lowering operation of the disc mower 9 by the hydraulic device 3, and lifts and lowers the cutter bar 13 so that the tip side of the cutter bar 13 is greatly lifted by the movement of the top link 6 when it rises. It is constructed as shown in FIGS. 6 to 11. That is, in FIG. 6, 47 is an extension punch, which is made by joining two strips so that a fork 48 is formed in the front half, as shown in FIGS. 7 to 9. 47 is a state in which the top link 6 is sandwiched between the forked portions 48, and a mounting pin 5 is attached to the top mast 1 from the river along with a ball joint 40 at the rear end of the top link 6 at approximately the center in the longitudinal direction.
7 is pivotally attached to the upper end. The front ends of the forked parts 48 of the extension punch 47 are connected to each other by a U-shaped support tool 51, and the bale support tool 51 is connected to the top link via a vibration isolating material 52 such as rubber affixed thereto. 6 in the longitudinal direction from below. The top link 6 is a cylindrical turnbuckle body 5.
3, and a pair of screw shafts 54 with a reverse screw structure screwed thereto.
The support tool 51 is applied near the approximate center of the turnbuckle body 53. Extension punch 47 is top link 6
A connecting point 55 is provided on the rearward extension of the connecting point 55, and a lifting element 56 is connected to the connecting point 55. The lower end of the lifting element 56 is connected to a bell crank 57, which is connected to the tenth bell crank 57.
As shown in FIG. 1 and FIG. 11, the mower Isomura 10 is fixed to a fixed bracket 58 erected at the approximate center thereof via a support shaft 59, and a connecting rod 60, an elastic body 61, a connecting tool 62, etc. It is connected to a protrusion 63 on the upper end of the transmission device 11 through it. That is, the connector 62 has a U-shape and is connected to a protrusion 63 on the open side, and one end of the connecting rod 60 is slidably inserted through the connector 62. The elastic body 61 is screwed onto the connecting rod 601 and the connecting rod 601, and the connecting rod 601 is held between the nuts 64 and 65. The length of the lifting element 56 is such that it is slightly slack when the cutter bar 13 is in a working position resting on the ground. During work, the cutter bar 13 is at the work position A and moves up and down around the longitudinal axis 19. That is, at this time, there is some slack in the lifting element 56 and the elastic body 61 is in a free length state, so the cutter bar 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 raises the entire disc mower 9 via the three-point linkage mechanism 5. At this time, the cutter bar 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 support tool 51 at the front end of the extension punch 47 is in contact with the top link 6 from below, so the top link 6 and the extension punch 47 rotate together while remaining substantially in a straight line, and as they rise, The relative angle 6 with respect to the mower frame 10 becomes small, and the rear end of the extension village 47 pulls up the lifting element 56 upward (indicated by arrow a). However, since there is some slack in the hoisting millet 56, at the beginning of the ascent, only the inner end of the cutter bar 13 is raised together with the mower frame 10, and the cutter bar 13 rotates relative to the front and back axis 19. The tip end remains in contact with the ground as shown by the solid line in FIG. When the elastic body 61 becomes compressed, the cutter bar 13 starts to rise at a faster speed than the mower frame 10. That is, the cutter bar 13 rises together with the mower frame 10, and at the same time, the extension punch 47 releases the hanging element 56, bell crank 57, connecting rod 60, elastic body 61, connecting rod 62, and transmission device 11.
Since the special lifting force in the direction of the arrow b is applied around the longitudinal axis 19 via the rear axis 19, it sequentially rotates in the direction of the arrow b as the whole lifts 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. Particularly when turning in a place with many ups and downs, when the rear wheel 2 on the opposite side of the cutter bar 13 is raised over a raised area, the tip side of the cutter bar 13 becomes abnormally low and comes into contact with grass, etc. Nor. However, if it is made separate from the top link 6 as in the embodiment and detachably attached using the attachment pin 50, it can be easily adopted in the ordinary three-point link mechanism 5.

Furthermore, the rear abutment tool 51 at the front end of the extension punch 47 is abutted against the approximately central portion in the longitudinal direction of the top link 6, and the mounting pin 50 and the abutment tool 51
Since the dimension E between the two and Since the top link 6 is in contact with the center of the turnbuckle body 53, there is a possibility that the top link 6 may bend due to the load on the cutter bar 13 side. Note that the saddle contact position of the rear abutment tool 51 against the top link 6 is preferably farther away from the mounting pin 50 from the relationship of the IJ torque ratio, and therefore it is also possible to configure it in a turnback shape. Further, the top link 6 and the extension punch 47 do not necessarily have to be in a straight line, and the extension punch 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 addition, the cutter bar 3 in particular is pivotally supported on the inner end side, and the amount of lateral protrusion is extremely large, so the tractor body 1 may be moved up or down even slightly due to causes such as the rear wheels 2 being raised against stones. When the cutter bar 13 swings, a strong impact is applied to the support portion of the cutter bar 13, but by interposing the elastic body 61, this impact can be sufficiently absorbed and alleviated. [m] Belt transmission mechanism 12 The belt transmission mechanism 12 is for interlockingly connecting the input shaft 21 and the front and rear shaft 19 at the upper end of the transmission device 11, and is constructed as shown in FIGS. 10 and 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 flexible pocket 22 is connected to the front end of the input shaft 21, and a rotary shaft 22 is connected to the rear end of the input shaft 21. The rotating cylindrical body 72 is freely rotatably attached to the rotary cylindrical body 72 via ball bearings 70 and 71, and power is transmitted between the input shaft 21 and the rotating cylindrical body 72 only from the input shaft 21 side. A one-way clutch 73 is incorporated. 74
75 is a driven pulley fixed to the front and rear shaft 19, and these pulleys 74, 7
A plurality of belts 76 are hung between the belts 5 and 5.

A tension pulley 77 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 twists the belt 7 through the elastic body 801.
It is supported elastically in the direction of pressing 6.

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 belt cover that surrounds the pulleys 74, 75 and the belt 76, and these are attached to the mounting nut 8.
5. The mower frame 10' is attached at four locations using mounting bolts 86 and soot nuts 87.

That is, the mounting nut 85, the mounting bolt 86, etc.
The mounting nuts 85 are arranged at upper and lower positions close to the respective pulleys 74 and 75 between 6 and 6, respectively, and the mounting nuts 85 are fixed to the mower frame 10 side. Each mounting bolt 86 is provided with a ball punch portion 88 for ensuring spacing like a distance collar, and a pair of threaded portions 89 and 90 formed at both ends, and the shaft portion 88 is equipped with a spanner or the like. It is formed in a hexagonal shape to allow iron attachment of tools. Then, the inner cover 83 is fixed between the mounting nut 85 and the end face of the Fujimura part 88 by screwing the threaded part 89 of the mounting bolt 86 into the mounting nut 85, and the belt cover 84 is fixed by screwing the threaded part 89 of the mounting bolt 86 into the mounting nut 85. Thread part 90
The end face of the shaft portion 86 and the wing nut 90 are supported and fixed by a threaded wing nut 87. When the disc mower 9 is driven, the power from the tractor body 1 is transmitted from the free handwheel 22 to the input shaft 21, one clutch 73, the rotating cylinder 72, the driving pulley 74, the belt 76, and the driven pulley 75 before and after the transmission device 11. The tension of the belt 76 is transmitted to the shaft 19, and the tension of the belt 76 is kept substantially constant by a tension pulley 77 and the like.

When the disc mower 9 is raised during reaping work, the rotating disc 29 rotates due to inertia, and the power is reversely transmitted via the driven pulley 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 swivel shaft 22 due to reverse drive. Furthermore, even if the PTO clutch is disengaged, the PT○ shaft system will not be reversely displaced. Inner cover 83 and belt cover 8
4, a mounting bolt 86 with a distance retaining collar part 88 and a pair of screw parts 89 and 90 is used, so a distance collar between the inner cover 83 and the belt cover 84 is not required. Therefore, the structure can be greatly simplified. Furthermore, even when the wing nut 87 is loosened and the belt cover 84 is removed, the mounting bolts 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 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 the belt 76, the mounting bolt 86 functions to prevent entanglement, and even if it comes into contact with the belt 76, grease or clothing 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.

[W] 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 lateral direction and the inner end of the cutter bar 13, and is configured in a vertically elongated shape. As will be described later, this transmission device 11 has the function of supporting the cutter bar 13 across the mower frame and the function of transmitting power from the belt transmission mechanism 12 to each rotary disk 29 on the cutter bar 13.

14 and 15, reference numeral 91 denotes an upper gear case, on which a cylinder shaft 92 and a bearing case 93 are attached on both front and rear sides, and a pair of holding cylinders 95 attached to the cylinder shaft part 94 of the cylinder shaft 92 and bearing case 93. It is supported so as to be able to swing freely 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-rear shaft 19 is rotatably housed in a bearing case 93 via ball bearings 98, 99, and a driven pulley 75 is fixed to the rear end of the front-rear shaft 19, and a bell gear 100 is fixed to the inner end of the front-rear shaft 19. The bevel gear 100 is connected to the bevel pinion 101, and the bevel pinion 101
is rotatably mounted on the lower opening 102 side of the upper gear case 91 via a ball bearing 103, and the upper end of the vertical shaft 20 is connected to the bevel pinion 101 in a spline formation. 104 is a holding case, and upper gear case 91
It is integrally flange-jointed to the lower end portion of the body by a plurality of bolts 105 in the circumferential direction.

106 is an intermediate case, which includes a holding case 104 and a bush 10;
At the upper end of this intermediate case 106, there is an oil seal 108 that is slidably slidable about the vertical axis 20 below the bevel gear 103. At the same time, the retaining ring 109 is attached to the bolt 110'.

The retaining ring 109 is attached to the seal holding portion 111 of the intermediate case 106.
The outer periphery of this retaining ring 109 protrudes outward from the intermediate case 106 and is regulated in the same manner with respect to the vertical axis 201 by the retaining 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 has a cylindrical part 113 that has the same D shape as the vertical axis 20 and projects upward.
02 so that it can rotate freely. In addition, the retaining ring 10
9 and the upper and lower opposing surfaces of the intermediate case 106, the cylindrical portion 113
and the lower opening □ part 102 of the upper gear case 91 are interposed with ○ rings 1 14, 1 15, respectively.
1J rings 114, 115 and the oil seal 108 prevent the lubricating oil 116 in the upper gas case 91 from being removed by the intermediate case 10.
This prevents leakage to the 6th side. The lower end of the vertical shaft 20 is rotatably inserted into the lower end of the intermediate case 106 via a bearing holder 117 and a ball bearing 118 . 119
is a lower gear case that is integrally formed on the inner end of the cutter bar 13, and is integrally connected to the intermediate case 106 through a plurality of bolts in the circumferential direction while being attached to the bearing holding portion 117 at the lower end of the intermediate case 106. Inside this lower gear case 119 are bearing cases 121 and 12 on both left and right sides.
2 and ball shafts 123 and 124, a machine shaft 125 is rotatably mounted.

The horizontal axis 125 is substantially parallel to the longitudinal direction of the cutter bar 13, and has a bevel gear 127 that fits into a bevel gear 126 at the lower end of the vertical axis 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 bar 13. Note that the drive shaft 129 is interlocked and connected to each rotary disk 29 via a bevel gear mechanism or the like. Two bearing cases 121,1
22, the bearing case 121 on the side that receives the thrust load acting on the machine shaft 125 from the bevel gear 127 is vertically attached to the lower gear case 119 by bolts 131, and the bearing case 122 on the opposite side to the thrust load is attached to the lower gear case 119 by a retaining pin 132. It is fixed to the gear case 119, and a ball bearing 124 is inscribed therein so as to be relatively slidable in the axial direction. That is, the bearing case iron part 133 of the lower gear case 119 has a pin hole 134 in the horizontal direction as shown in FIG.
A pin hole 13 is formed on the outer circumferential surface of the cylindrical part of the bearing case 122 which is embedded in the bearing case iron fitting part 133.
A conical engagement recess 135 is formed to match the pin hole 134 and the engagement recess 135, and a retaining pin 132 is inserted into the pin hole 134 and the engagement recess 135 in an insertion/extraction position. Retaining pin 13
As shown in FIG. 16, 2 has a leaf spring shape whose upper end protrudes from the pin hole 134 and has a small-diameter protrusion 137 at the protruding end via a step 136, and which comes into contact with the step 136. is pressed downward by an elastic body 138. The elastic body 138 is removably attached to the lower gear case 119 at both ends with two bolts 139, and has an elongated hole 14 in the center with which the protrusion 137 of the retaining pin 132 engages.
0 is set. On the other hand, the inner circumferential surface of the bearing case 122 is formed into an emotional surface 141, and the outer ring of a ball bearing 124, which is wrapped around and fixed to the horizontal shaft 125, is mounted on the sliding surface 141 so as to be able to slide freely in the direction of the center. ing. Therefore, structurally,
The thrust load of the horizontal shaft 125 does not act on the bearing case 122 at all. 142 is an external case,
The cutter bar 13 is rotatably mounted on the holding case 104 via a bush 143, and the cutter bar 13 is located at the upper end of the outer case 142 and the holding case 104 in a working position A and a rear storage position C. A positioning device 144 for positioning is incorporated in the lower end sides of the outer case 142 and the intermediate case 106 to move the cutter bar 13 from the working position A to the safety escape position B when the cutter bar 13 comes into contact with an obstacle. A positioning device 145 is incorporated for rotating the shaft up to a maximum angle.

The positioning device 144 is shown in FIGS. 17 to 19.
``During the process {・Y Minami 2 $ ¥'' ・Pillow ^ - The dead convex part 146, the overhanging edge part 147 that was threshed outward in the direction of the grain from the outer case 142 opposite to this, and the overhang part The piso hole 148 formed in 146 and each part of the cutter bar 13 are straight A.
, C, two pin holes 143, 150 are formed in the protruding twill portion 147 to match with the pin hole 148, and a positioning pin 151 is inserted into the pin hole 148 and can be freely inserted into and removed from the pin holes 149, 15. It consists of:

Each pin hole 148, 149, 150 is provided with a hard collar 152 to prevent it from collapsing. The positioning pin 151 is positioned within the U-shaped range of the connecting frame 97, and has an L-shaped gripping punch 153 with a pongee diameter.
The straight 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 urged downward by a coiled elastic body 155. Information board 15
4 is provided with a locking portion 156 that protrudes outward in the folding direction from the upper part, and the gripping punch 153 of the positioning pin 151 can be freely engaged and detached from the locking portion 156 by rotation.
56, the positioning pin 151 can be locked in the removed position. Stoppers 157 and 158 are attached to both circumferential end surfaces of the overhanging twill portion 147 by bolts, and abut on the overhanging portion 146 at straight lines A and C of the cutter bar 13, respectively.
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 engagement tool 160 is fixedly provided, which is engaged by the engagement portion 159 when the device is rotated to the rear storage position C range. That is, when the cutter bar 13 is rotated toward the rear storage position C, the engaging portion 159 engages with the engaging tool 1601 to prevent the cutter bar 13 from rotating around the front-back axis 19. It is configured like this. Safety device 145 is the second
As shown in FIG. 0 and FIG. 21, there is a projecting portion 161 projecting outward in the sparrow direction from the lower end of the outer case 142, and a circular arc shape projecting outward in the radial direction from the lower end of the intermediate case 106. When the cutter bar 13 is located at the working position A, the overhanging portion 161 and the overhanging edge 1
The pin holes 163, 164 formed in 62 are inserted into the pin holes 163, 164 and fastened.
1-166 are installed parallel to each other on both the front and back sides, and the mounting plate 166 also serves as a stopper that restricts the rotation of the cutter bar 13 within the range of working position A and safety relief position B. They are configured to be able to come into contact with the projecting portions 161 of the external case 142, respectively.

The safety guard 15 is supported by a column 167, and the column 167 is fixed to a mounting plate 172 supported between a pair of mounting plates 166, and is always rotatable together with the cutter bar 13. Note that lubricating oil 168 is stored in the lower gear case 119 up to about the machine shaft 125, and
A bearing stand 69 supports the inner end of the drive shaft 129 via a ball bearing 170, and is attached to the inner wall 17 of the lower gear case 119.
1 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 100 and the bevel pinion 10.
After being transmitted to the vertical shaft 201 via the vertical shaft 20, it is transmitted from below the vertical shaft 20 to the drive shaft 129 via the bevel gears 126, 128, the machine shaft 125, and the gears 128, 130.

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 internal vertical shaft 20 to drive the drive shaft 129 in the cutter bar 13, so the belt transmission mechanism 12 is The mower frame 10 can be provided horizontally in parallel with the machine frame 10, and therefore, as described above, the mower frame 10
It is possible to increase the ground clearance below. When working,
As shown in FIG. 18, the stopper 1 of the outer case 142
Positioning pins 151 are inserted into the pin holes 148 and 149 with the positioning pins 151 being inserted into the pin holes 148 and 149 while the positioning pins 151 are in contact with the projecting portions 146 of the holding case 104, and the cutter bar 13 is fixed at the working position A by the positioning pins 151.

Therefore, when the cutter bar 13 is to be driven on the road after finishing the work, the cutter bar 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, pull up the positioning pin 151 upward against the elastic body 155 to close the pin hole 142 of the external case 142.
After pulling it out, the gripping punch 163 is rotated and locked in the locking portion 156 of the guide plate 154 as shown by the imaginary line in FIG.
Next, hold the free end of the cutter bar 13 and move it slightly backwards d.
Insert the positioning pin 151 in the direction of the arrow and insert it into the pin hole 14.
9 from the corresponding position, and when the positioning pin 151 is removed from the pin hole 149, the gripping village 153 is removed from the locking part 156, and the positioning pin 161 is placed on the upper surface of the protruding green part 147 of the external case 142 by the elastic body 155. Then, holding the free end side of the cutter bar 13, move the cutter bar 13 around the vertical axis 20 in the direction of arrow d to the rear storage position C.
rotate it to Then, when the cutter bar 13 reaches the rear storage position C, the stopper 158 closes the holding case 10.
4, the pin hole 149 coincides with the positioning pin 151, and the positioning pin 151 descends due to the elastic force of the elastic body 155 and competes with the pin hole 149, whereby the cutter bar 13 to be fixed. If the cutter bar 13 is stored in the rear storage position C, the left and right weight balance will be better than if the disc mower 9 is left in the working position A when traveling with the entire disc mower 9 raised. In particular, since the rear storage position C is a position rotated more than 90 degrees from the working position A, the cutter bar 13 itself is inclined at the rear of the tractor body 1.
Although the cutter bar 24, rotary disk 20, etc. protrude from the front side of the cutter bar, they do not protrude laterally outwardly from the tractor body 1. The center of gravity of the vehicle 13 has been moved to the center of the tractor body 1, and the left and right weight balance is even better. When the entire disc mower 9 is raised to rotate the cutter bar 13 to the rear storage position C, the center of gravity of the cutter bar 13 moves inward beyond the longitudinal axis 19 because it is rotatable around the longitudinal axis 19. When moving, the cutter bar 13 tries 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 member 1601, as shown in FIG. From then on, the engaging portion 159 slides on the engaging tool 160 to the rear storage position C, thereby preventing the cutter bar 13 from rotating inward. Typically, an outer case 142 and an intermediate case 1
06 is a shear pin bolt 165 as shown in Figure 20.
are concluded.

Therefore, during work, the cutter bar 13 comes into contact with wood, stone, etc., and a load greater than the strength of the shear pin bolt 165 is applied to the vertical shaft 20.
When the cutter bar 13 side of the intermediate case 106 etc. is connected to the 21st
As shown in the figure, it rotates around the vertical koji 20 in the direction of the arrow d to a safe release position B, thereby preventing damage to each part. cutter bar 1
3 reaches the safety escape position B, the mounting plate 166 is regulated by fitting into the protrusion 161 of the outer case 142. In this case, the safety relief & calendar B is set at a position rotated by 90 degrees from the working position A, and the amount of relief of the cutter bar 13 is set large, so the tractor body 1 is moved after the cutter bar 13 comes into contact with the obstacle. There is plenty of time to stop the process. If the rotation axis ○ for storage and safety of the cutter bar 13 is set as the vertical axis 20 of the transmission device 11, and the case part is made into a triple structure of the holding case 104, the intermediate case 106, and the outer case 142, the cutter bar 13 pivots. The supporting structure can be greatly simplified, which is extremely effective in making the whole 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, thereby ensuring that the intermediate case 106 is prevented from coming off, and also making it easy to assemble them. Moreover, the ring 109 is connected to the seal holding portion 111 of the intermediate case 106 and the upper gear case 9.
Since they are iron-fitted to the Shimonoseki mouth part 102 of No. 1 and also function as centering, the assembly accuracy of these parts is good. Furthermore, since the retaining ring 109 is used to seal the upper gas case 91, the sealing structure between the upper gas case 91 and the intermediate case 106 is simple and reliable, and the upper gas case 91 and the lower gas case 109 are independent from each other. The lubricating oil 116, 168 can be stored therein. Horizontal axis 125
Of the bearing cases 121 and 122 that support the
Since the ball bearing 124 is mounted on the ball bearing 124 so as to be able to slide freely in the axial direction, there is no need to make special holes on the inner circumferential surface of the bearing case 122, or to form a step for positioning. The vibrations of 125 are caused by the ball bearing 124 and bearing case 1.
22, it is sufficient to simply fix the bearing case 122 with the retaining pin 132.

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
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 end of the retaining pin 132 and the engagement recess 135 are tapered, play between the retaining pin 132 and the bearing case 122 can be eliminated.
In the embodiment, the top rework 6 and the extension village 47 are separate bodies, but it is also possible to integrate them.

Further, an elastic body 61 is interposed between the extension punch 47 and the protrusion 63 of the transmission device 11, but this is not always necessary, and if the elastic body 61 is interposed, it may be a tension spring, unlike the illustrated example. . In the present invention, a punch having a connection point rearward of the pivot point between the top link and the mower machine frame is provided so as to be able to move up and down integrally with the top link when the mower frame is raised and lowered, and the punch has a connecting point and a cutter bar. Since the sides are connected via a connecting means, sufficient ground clearance can be ensured on the tip side of the cutter bar during lifting and lowering, and turning operation is extremely easy. Furthermore, since the movement of the top link of the three-point 1' link mechanism is utilized, the structure is simple.

[Brief explanation of drawings]

The drawings illustrate one embodiment of the present invention, and show the first 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 V-V 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, FIG. 10 is a broken rear view of the belt transmission mechanism section, FIG. 11 is a view taken along the M-red arrow in FIG. A plan view, FIG. 14 is a rear view of the transmission part, FIG. 15 is a 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, and FIG. FIG. 19 is a cross-sectional plan view of the same, FIG. 19 is an explanatory view of the same operation, FIG. 20 is a cross-sectional plan view of the safety device section, and FIG. 21 is an explanatory view of the same operation. 1... Tractor body, 5... Three-point linkage mechanism,
6...Top link, 9...Disc more, 10...
・Mower machine frame, 11...Transmission device, 12...Belt transmission mechanism, 13...Cutter bar, 14...
... Gauge wheel, 16 ... Cutter bar lifting device, 19 ... Front and rear 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 village, 51... Contact tool, 55... Connection point, 56... Lifting element, 60... Connection rod, 62... ... Connector, 74 ... Drive pulley, 75 ... Driven pulley, 76 ... Belt, 83 ... Inner cover, 84 ... Belt cover, 86 ...
...Mounting bolt, 88...Shaft village, 89,90
...Thread part, 91 ... Upper gear case, 104 ... Holding case, 106 ...
Intermediate case, 109... Removal prevention ring, 119...
... Lower gear case, 121, 122 ... Bearing case, 125 ... Machine shaft, 132 ... Stopping pin, 134 ... Pin hole, 135 ... ... Engagement recess, 144... Positioning device, 145...
... Safety device, 151 ... Positioning pin,
157,158...Stotsu/Gu-, 159...
...Engagement part, 160...Engagement tool, 165.
...Sharpin bolt, 166...Mounting plate. Figure 1 Figure 2 Figure 8 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 9 Figure 10 Figure 11 Figure 13 Figure 19 Figure 21 Figure 12 Figure 14 Figure 16 Figure 17 Figure 18 Figure 20 Figure 15

Claims (1)

[Claims] 1 attached to the rear end portions of the top link 6 and lower link 7 that constitute the three-point link mechanism 5 on the mobile body 1 side via pivot joints, and connected to the mobile body 1 via the three-point link mechanism 5 In a mower equipped with a mower frame 10 that can be raised and lowered, and a cutter bar 13 that is pivotally connected to the mower frame 10 so as to be swingable about a front-rear axis 19, the pivot 6 and the mower frame 10 are pivoted. A rod 47 having a connecting point 55 protruding rearward from the portion 50 is provided so as to be movable up and down integrally with the top ring 6 when the mower frame 10 is raised and lowered, and the connecting point 55 and the cutter bar 13 side are connected as a connecting means. 56,5
A cutter bar lifting device for a mower, characterized in that the mower cutter bar is connected via 7, 60, and 61.