JP2017139993A - Connecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem in a riding type traveling vehicle in which a working machine including a mounting hitch compatible with a hitch shape of a removable hitch is mounted, and further the working machine is mounted in one front place thereof when the working machine is mounted in the removable hitch, and therefore the fixing force is low and a mounting portion cannot tolerate the vibration and impact of the working machine and might be damaged.SOLUTION: A connecting device 16 is provided for connecting a riding type traveling vehicle with a walking type management machine 17 (working machine). The connecting device includes: a hitch device mounting bracket 66 (first connection part) connected to a lifting/lowering link device 11 (lifting/lowering device) of the riding type traveling vehicle; a front hitch mounting hole 67 (second connection part) disposed at the rear of the hitch device mounting bracket 66, and connected to the walking type management machine 17; and a turning frame mounting bracket 69 (third connection part). The front hitch mounting hole 67 and the turning frame mounting bracket 69 are deviated and disposed in the traveling direction of the riding type traveling vehicle.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a connecting device that connects a traveling vehicle and a work machine.

  In general, in order to increase the mobility of the riding rice transplanter, the lifting link and the planting part are detachably connected by a detachable hitch, and work other than the planting part can be connected to enable work other than seedling planting. An agricultural machine has been proposed (see Patent Document 1). In this agricultural machine, a leveling device is attached to a detachable hitch attached to a lifting link, and a direct seeding device is attached to the lifting link and locked by a lock member.

JP 2010-148408 A

  The farm work machine described in Patent Document 1 takes out power from the power source of the riding type rice transplanter, and drives a dedicated work machine with the power. For example, power is insufficient in tillage work in upland farming. Therefore, it is conceivable to install a walking type tiller and use the power of the tiller to perform the tilling work, but in this case, it corresponds to the weight of the tiller itself as the working machine and the work reaction force of the tilling Therefore, a stronger work machine support structure is required.

  Therefore, the present invention provides a connecting device having a work machine support structure that can attach a work machine at two positions shifted forward and backward to a riding type traveling vehicle and can firmly support other than the dedicated work machine. The purpose is to do.

The present invention relates to a connecting device (16) for connecting a lifting device (11) and a work implement (17) of a riding type traveling vehicle (2).
A first connecting portion (66) connected to the elevating device (11) of the riding type traveling vehicle;
A second connecting part (67) and a third connecting part (69) disposed behind the first connecting part (66) and connected to the work implement (17);
The second connecting portion (67) and the third connecting portion (69) are arranged so as to be shifted in the traveling direction of the riding type traveling vehicle (2).
It is characterized by that.

  For example, as shown in FIG. 1, in a state where the second connecting portion (67) and the third connecting portion (69) are connected to the work machine (17), the third connecting portion (69). Is arranged behind and above the second connecting portion (67).

For example, as shown in FIG. 7, the working machine (17) is a walking type management machine having a handle attachment part (49) to which a handle can be detachably attached and a tilling device (30) for plowing a farm field. ,
The third connecting portion (69) is connected to the handle attachment portion (49) so as to be rotatable about a vertical rotation shaft, and is disposed so as to overlap the tillage device (30) in plan view. Is done.

  For example, as shown in FIG. 7, the second connecting portion (67) is a fixing means that can fix the work implement (17) by selecting a rotational position around the rotational axis.

  In addition, although the code | symbol in the said parenthesis is for contrast with drawing, it has no influence on the structure as described in a claim.

  According to the first aspect of the present invention, since the connecting portion of the connecting device for the work machine is disposed at two positions shifted in the traveling direction of the riding type traveling vehicle, an external force from the traveling direction that is particularly easily received during traveling is applied. Disperse and work machines can be firmly connected.

  According to the second aspect of the present invention, since the work implement can be attached to the space behind the second connecting portion and below the third connecting portion, the work implement can be attached to the connecting device in a compact manner. In addition, since the work implement is connected to the connecting device at two positions shifted in the vertical direction, the vertical force received by the work implement such as a tillage machine from the field can be dispersed, and damage to the mounting portion of the work implement can be prevented. Can be prevented.

  According to the third aspect of the present invention, since the third connecting portion is connected using the handle mounting portion of the walking-type management machine, the walking-type management machine can be replaced by a simple recombination operation. Can be linked. Further, the third connecting portion is connected to the handle attachment portion so as to be rotatable about a vertical rotation shaft, and is arranged so as to overlap the tillage device of the walking type management machine in a plan view. The tilling device can be rotated to the left and right, and even when rotated, the tilling device can be plowed substantially equally to the left and right with respect to the center of the riding type traveling vehicle.

  According to the fourth aspect of the present invention, since the walking type management machine that can rotate about the rotation axis can be fixed to the second connecting portion, the walking type management machine is set in the traveling direction of the riding type traveling vehicle. On the other hand, it is mounted with an inclination, for example, a rotary plow can be mounted and a riding type traveling vehicle can be driven to perform a tilling work.

1 is an overall side view showing a riding type tiller according to an embodiment of the present invention. The top view which shows the riding-type field cultivator which concerns on embodiment of this invention. The upper perspective view which shows the riding-type field cultivator which concerns on embodiment of this invention. The upper perspective view which shows the connection of a working vehicle and a connection apparatus, and the connection of a walk type management machine and a connection apparatus. The figure showing the front surface, plane, and right side which show the working machine which concerns on embodiment of this invention. The figure showing the back surface, plane, and left side which show the working machine which concerns on embodiment of this invention. The top view which shows the working machine which concerns on embodiment of this invention. The upper perspective view which shows the connection of a working vehicle and the 3rd connection part of a connection apparatus. The figure showing the front, the plane, and the right side which show the connecting device concerning an embodiment of the invention, the figure showing the back, the plane, and the left side, the front view, the right side view, and the top view.

  Hereinafter, an embodiment of the present invention applied to a riding type tiller 1 as a traveling farm working machine for tilling a field will be described with reference to the drawings. As shown in FIGS. 1, 2 and 3, the riding type tiller 1 includes a riding type traveling vehicle 2 which is a traveling part of a rice transplanter, a walking type management machine 17 (work machine), and the riding type. And a connecting device 16 for connecting the walking type management machine 17 to the rear portion of the traveling vehicle 2. The riding-type traveling vehicle 2 includes a traveling machine body 7 supported by front wheels 5 and rear wheels 6. An engine is mounted on the front portion of the traveling machine body 7 by being covered with a bonnet 9, and a driver seat 10 including a driver seat or the like is provided behind the engine. An elevating link device 11 (elevating device) is disposed at the rear of the traveling machine body 7, and the elevating link device 11 can be driven up and down by a hydraulic cylinder 12 and is attached to a rear end portion of the elevating link device 11. The hitch device 13 is connected to the connecting device 16. A gauge wheel 15 is attached to the lower front portion of the connecting device 16.

  As shown in FIGS. 3 and 4, the elevating link device 11 has a top link 19 and a lower link 20 that protrude rearward of the traveling machine body 7 and can swing up and down. The top link 19 and the lower link 20 are each composed of a pair of left and right links. Between the rear ends of the top link 19, an upper mounting shaft 21 extending in the left-right direction is installed and supported. A lower mounting shaft 22 extending in the left-right direction is installed and supported between the rear end portions. The hydraulic cylinder 12 is connected between the lower mounting shaft 22 and the traveling machine body 7. The hitch device 13 is disposed between the upper mounting shaft 21 and the lower mounting shaft 22, and the hitch device 13 includes an upper bearing hole 23 into which the upper mounting shaft 21 is inserted and the lower mounting shaft 22. A hitch frame 26 supported by the lower bearing hole 25 inserted therein, and an upper receiving member 27 and a lower receiving member 29 provided in a pair of upper and lower portions at the rear end of the hitch frame 26 are provided. The hitch frame 26 is rotatably inserted into the upper mounting shaft 21 and the lower mounting shaft 22 through the upper bearing hole 23 and the lower bearing hole 25. Since the lift link device 11 functions as a parallel link, the hitch frame 26 is held in the same or substantially the same posture in the vertical direction even when the lift link device 11 swings up and down.

  The upper receiving member 27 and the lower receiving member 29 are U-shaped with the upper side opened in a side view, and the front upper ends of the upper receiving member 27 and the lower receiving member 29 are directly above in a side view. It extends in a straight line. On the other hand, the rear upper ends of the upper receiving member 27 and the lower receiving member 29 are curved downward to form an arcuate guide. Further, the upper receiving member 27 and the lower receiving member 29 are formed in the left-right direction so as to protrude from the hitch frame 26 in the left-right direction in the rear view.

  Next, the walking management machine 17 will be described with reference to FIGS. 5, 6, and 7. The walking type management machine 17 has a machine body 31 equipped with a rotary plow tillage device 30 (cultivation device) having a disk 71 attached to a rotary shaft 70. The machine body 31 includes an engine 32, a transmission case 33, a front hitch 39. And a rear hitch 40. A belt transmission 35 that transmits the power of the engine 32 to the input shaft of the transmission case 33 is provided on the left side of the engine 32 and the transmission case 33, and the rotary shaft 70 is interposed via the transmission case 33. Power is transmitted to. A fuel tank 36 is disposed above the engine 32, and a filler cap 37 is disposed above the fuel tank 36. The front hitch 39 has a U-shape with the front opened in a side view, and a hole penetrating in the vertical direction on the upper surface and the lower surface is located at one position at the center of the left and right of the airframe 31. It has a structure in which two holes that are symmetrical with respect to the position and a total of three holes are arranged in a straight line and are attached to the tip of the airframe 31. The rear hitch 40 is attached to the rear end portion of the airframe 31 with a structure similar to that of the front hitch 39, with the opening portion being rearward in a side view.

  A disc rotary attachment device 41 is connected to both ends of the rear hitch 40 and the rotary shaft 70. The disc rotary attachment device 41 has a tail wheel 42 and a U-shaped rear frame 43 supported by the tail wheel 42, and the scraper frame 45, a residual tillage treatment member 46 and an additional weight are attached to the rear frame 43. 47 is provided.

  As shown in FIG. 8, a swivel frame 49 (handle mounting portion) having a large hole in the center and a plurality of small holes on a concentric circumference around the hole is provided at the rear upper part of the body 31. A handle frame rotating cylinder shaft 50, which is a cylinder penetrating vertically, is inserted and fixed in a large hole of the swivel frame 49. Normally, when a person uses the walking-type management machine 17, a handle frame that extends upward from the upper surface of the revolving frame 49 and bends and extends rearward, rearward, and rearward is provided on the handle frame rotating cylinder shaft 50. It can be attached to the machine body 31 in such a manner that it can be rotated in the left-right direction and is detachable. A handle is supported at the rear end of the handle frame so as to be rotatable in the vertical direction, and a main clutch lever and a reverse clutch lever are provided near the left and right grips of the handle, respectively.

  Here, the connecting device 16 will be described in detail with reference to FIG. The connecting device 16 includes a lifting link device connecting frame 51, a front hitch connecting frame 55, a sub frame 56, and a turning frame connecting frame 60. The elevating link device connecting frame 51 is formed by bending a metal plate-like member into a U shape with the lower part opened in a front view, and between the left and right side portions of the elevating link device connecting frame 51. The hitch device mounting bracket 66 (first connecting portion) is fixed. The hitch device mounting bracket 66 extends in a pair of upper and lower left and right directions, and is composed of an upper connection pin 52 and a lower connection pin 53 that are erected and fixed between the left and right side portions of the lift link device connection frame 51.

  The front hitch connection frame 55 is attached to the lower rear portion of the lift link device connection frame 51. The front hitch connection frame 55 has a shape in which a metal plate-like part bent in a U-shape opened rearward in a side view extends to the left side and bends and extends to the left rear. It has become. The front hitch connection frame 55 has a front hitch attachment hole 67 (second connection portion) that is formed in a plurality of holes that penetrates in the vertical direction on the upper surface and the lower surface and can be fixed by holes and pins of the front hitch. The front hitch attachment hole 67 has a round hole formed at a position that becomes the center of the right and left of the elevating link device connection frame 51 and a portion that bends and extends to the left rear along the front hitch connection frame 55. , And long holes opened at five equal intervals. The sub-frame 56 extending in the right direction is attached to the lower part of the right side surface of the lifting / lowering link device connection frame 51.

  A left gauge ring mounting bracket 57 and a right gauge ring mounting bracket 59 are attached to the front left of the front hitch connection frame 55 and the tip of the sub frame 56, respectively, in a cylindrical shape penetrating in the vertical direction. As shown in FIGS. 2 and 9, the left gauge ring mounting bracket 57 and the right gauge ring mounting bracket 59 are overlapped in the front-rear direction, and the center between them and the left-right center of the lifting link device connecting frame 51 And the distance between the two is arranged at a position where the front wheel 5 or the rear wheel 6 is less than the wheel tread and half or more. A cylindrical metal rod extending above the gauge wheel 15 is inserted into the left gauge wheel mounting bracket 57 and the right gauge wheel mounting bracket 59, and the left gauge wheel mounting bracket 57 and the right gauge wheel mounting. Pins are inserted and fixed in holes formed in the metal fitting 59 in the front-rear direction and holes formed in the metal rod of the gauge ring.

  The revolving frame connecting frame 60 is attached to the rear upper part of the lifting link device connecting frame 51. The revolving frame connecting frame 60 has a shape in which a metal plate-like part bent in a U-shape opened downward is extended rearward in a rear view. In order to support the weight that extends rearward, two L-shaped metal plate parts are attached by sandwiching the U-shaped pillars from the left and right side surfaces. One side of the L-shaped metal plate is attached to the rear portion of the elevating link device connection frame 51. A turning frame mounting bracket 69 (third connecting portion) is provided at the tip of the turning frame connecting frame 60 extending rearward of the lifting link device connecting frame 51. As shown in FIG. 8, the turning frame mounting bracket 69 is surrounded by a metal plate other than the lower surface, and has a cylindrical rotary bearing 61 penetrating in the vertical direction, and a metal cylindrical shape passing through the center of the rotary bearing 61. And a stopper 62. A square metal plate is attached to the lower end portion of the stopper 62, and the upper end portion is detachably attached to the distal end of the revolving frame connecting frame 60.

  The connection between the hitch device 13 and the lift link device connection frame 51 will be described with reference to FIG. The upper connecting pin 52 is detachably engaged with the U-shaped groove portion of the upper receiving member 27 and the lower connecting pin 53 is removably engaged with the U-shaped groove portion of the lower receiving member 29, respectively. Further, the open portion of the U-shaped upper portion of the lower receiving member 29 engaged with the lower connecting pin 53 is closed by a locking device 63 attached to the hitch device 13 so as to be rotatable in the vertical direction. . A lock pin 65 is inserted into the lock device 63 and the hitch frame, and the rotation of the lock device 63 is fixed.

  The connection between the revolving frame 49 and the revolving frame connecting frame 60 will be described with reference to FIG. The rotating bearing 61 is fitted to the handle frame rotating cylinder shaft 50 so as to be rotatable about a vertical rotating shaft, and the stopper 62 is inserted from the lower surface of the rotating frame 49. The metal plate at the lower end of the stopper 62 comes into contact with the lower surface of the revolving frame 49, the upper end is attached to the revolving frame connecting frame 60, and the revolving frame mounting bracket 69 overlaps the rotary plow tillage device in plan view. Are arranged as follows.

  The connection between the front hitch 39 and the front hitch connection frame 55 will be described with reference to FIG. With the front hitch connection frame 55 inserted inside the U-shaped frame of the front hitch 39, one of the through hole or the long hole of the front hitch connection frame 55 is selected as the rotation position. A pin is inserted and fixed in the rotation position and one of the three through holes of the front hitch 39.

  However, in FIG. 4, for the sake of explanation, the upper bearing hole 23 is drawn so as to be shifted with respect to the upper mounting shaft 21, and similarly, the lower bearing hole 25 is shifted with respect to the lower mounting shaft 22. It is drawn.

  Since the present embodiment is configured as described above, when attaching the walking type management machine 17 to the riding type traveling vehicle 2, the operator attaches and fixes the gauge wheel 15 to the connecting device 16, The turning frame 49 and the handle frame are removed from the walking type management machine 17. Subsequently, the stopper 62 is passed from the lower surface of the turning frame 49 to the handle frame rotating cylinder shaft 50, the turning frame 49 is attached to the walking type management machine 17 again, and the rotating bearing 61 is fitted into the handle frame rotating cylinder shaft 50. The upper end portion and the side portion of the rotary bearing 61 of the revolving frame 49 are attached to the revolving frame connecting frame 60. Thereafter, the front hitch connecting frame 55 is fitted into the front hitch 39, the through hole of the front hitch 39 and the front hitch mounting hole 67 are aligned and fixed with a pin. Both ends of the lira frame 43 of the disc rotary attachment device 41 are attached to both ends of the rotary plow tillage device 30, the center of the lira frame 43 is fitted into the rear hitch 40, both holes are aligned, and fixed with pins. Finally, the upper connecting pin 52 is engaged with the U-shaped groove portion of the upper receiving member 27 and the lower connecting pin 53 is engaged with the U-shaped groove portion of the lower receiving member 29, and the locking device 63 is rotated to rotate the lower connecting pin. By closing the open portion of the U-shaped upper portion of the lower receiving member 29 engaged with the pin 53, the walking type management machine 17 can be easily and firmly attached to the riding type traveling vehicle 2. Moreover, the connecting device 16 and the walking type management machine 17 can be made independent by the gauge wheel 15, and the attachment work after the connection of the connecting device 16 and the walking type management machine 17 can be easily performed.

  Further, since the rotary shaft 70 of the walking-type management machine 17 and the handle frame rotating cylinder shaft 50 to which the walking-type management machine 17 is mounted so as to be horizontally rotatable are close to each other in plan view, the rotary plow tillage with respect to the traveling direction. Even when the device 30 is set at an angle, the horizontal displacement of the rotary plow tillage device 30 with respect to the traveling vehicle 2 can be minimized, so that it is approximately the left and right center of the riding type traveling vehicle 2. Plowing can be carried out evenly on the left and right, and the gauge wheel 15 is located in the wheel tread of the riding type traveling vehicle 2, so that there is no influence of the dredging of the riding type traveling vehicle 2 or the adjacent tilling position, and the tilling posture Can be secured.

  In this embodiment, the handle frame rotating cylinder shaft 50 for attaching the handle frame of the walking type management machine 17 is used as the rotation axis for attaching the walking type management machine 17 to the traveling vehicle 2 so as to be rotatable. The rotary shaft 70 and the handle frame rotary cylinder shaft 50 are separated from each other in the front-rear direction by 7 cm due to the design of the walking-type management machine 17 itself. Rotation for attaching the walking type management machine 17 to the traveling vehicle 2 so as to be rotatable separately from the handle frame rotating cylinder shaft 50. When the shaft is provided so as to coincide with the left and right center portion of the rotary shaft 70 in a plan view, the right and left positional deviation of the rotary plow tillage device does not occur.

  Since the disc rotary attachment device 41 is fixed to the rear hitch 40 with a pin, it can be easily removed and other work machines can be attached to the rear hitch 40.

  The angle of the rotary plow tillage device 30 can be freely adjusted with respect to the traveling direction.

2 Passenger type traveling vehicle 11 Lifting device (lifting link device)
16 Linking device 17 Working machine (walking type management machine)
30 tillage device (rotary plow tillage device)
49 Handle mounting part (swivel frame)
66 1st connection part (hitch device mounting bracket)
67 Second connecting part (front hitch mounting hole)
69 Third connection (swivel frame mounting bracket)

Claims (4)

In the connecting device for connecting the lifting device of the riding type traveling vehicle and the working machine,
A first connecting portion connected to the lifting device of the riding type traveling vehicle;
A second connection part and a third connection part, which are arranged behind the first connection part and connected to the work implement;
The second connecting portion and the third connecting portion are arranged so as to be shifted in the traveling direction of the riding type traveling vehicle.
A coupling device characterized by that. In a state where the second connecting portion and the third connecting portion are connected to the work implement, the third connecting portion is disposed rearward and above the second connecting portion.
The connecting device according to claim 1. The working machine is a walking type management machine having a handle attachment part that can attach a handle detachably, and a tilling device that plows a field.
The third connecting portion is connected to the handle attachment portion so as to be rotatable around a vertical rotation shaft, and is arranged to overlap the tillage device in a plan view.
The coupling device according to claim 2. The second connecting portion is a fixing means that can fix the work implement by selecting a rotation position around the rotation axis.
The coupling device according to claim 3.

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