JPH07102001B2 - Work equipment coupling device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a work machine connecting device for connecting a work machine such as a snow blower, a mower, a blade or a sweeper to a front portion of a traveling vehicle such as a tractor.

(Prior Art) For example, as a technique for selectively connecting a plurality of types of work machines to a tractor, there is one disclosed in Japanese Utility Model Publication No. 61-8138.

In this technique, a mounting frame is provided in the front part of the tractor vehicle body, a standing frame is provided in the front part of the mounting frame, and a three-point link for mounting the front working machine in a vertically movable manner by the mounting frame and the standing frame. The mechanism is supported, and the three-point link mechanism and the standing frame are removed, and the front loader can be mounted using the front and rear portions of the mounting frame.

(Problems to be Solved by the Invention) In the prior art, when mounting the front working machine and when changing the working machine, the standing frame is attached to and detached from the mounting frame, and a three-point link mechanism is attached to them. Since it is necessary to attach and detach the bolts, the tightening and loosening of the bolts is troublesome, and lifting of heavy objects is required, which is a heavy labor and inefficient work.

According to the present invention, a coupler that is fitted and fixed to a fitted portion of a working machine is pivotally supported on a support frame so as to be rotatable about a horizontal axis, and the coupler is lifted between a mounting bracket and a coupler that are erected on the support frame. A mounting cylinder is provided, and the mounting bracket and the rear portion of the support frame are detachably attached to the traveling vehicle body, so that the coupler lifting cylinder is actuated to bend the coupler and the support frame in a dogleg shape, and the mounting bracket An object of the present invention is to provide a working machine connecting device that can be lifted up and mounted on a traveling vehicle body so that it can be easily attached to and detached from the traveling vehicle body.

(Means for Solving the Problem) A specific configuration for solving the problem in the present invention is a work machine connecting device that detachably connects a work machine to a front portion of a traveling vehicle, and has a fitting portion at a front end. And a coupler which is fitted and fixed to a fitted portion formed on the working machine by moving forward, a support frame which pivotally supports the rear portion of the coupler around a horizontal axis, and a front portion of the support frame. A mounting bracket which is erected upright, a coupler lifting cylinder provided between the mounting bracket and the coupler, a front connecting means for detachably connecting the mounting bracket and the front part of the traveling vehicle body, and a rear portion of the support frame. And a rear connecting means for detachably connecting the vehicle body and the traveling vehicle body.

(Operation) After the traveling vehicle 1 is straddled over the work implement connecting device 3,
The coupler raising / lowering cylinder 44 is operated to raise the rear part around the front part of the coupler 40 which is grounded.
The mounting bracket 43 at the front of 42 is raised and connected to the forked bracket 88 at the front of the traveling vehicle body 11. Then the cylinder
After reversely operating 44, the coupler 40 and the support frame 42 are made substantially linear, and then the rear portion of the support frame 42 is raised around the connecting portion between the traveling vehicle body 11 and the mounting bracket 43 to connect to the traveling vehicle body 11. Let The coupler 40 has a fitting portion 65 at the front portion, and is fitted and fixed to the fitted portion 57 of the working machine 2 by moving forward.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, a traveling vehicle 1 exemplified by a tractor is equipped with a working machine coupling device 3 for mounting a working machine 2 such as a snow blower, a front mower, a blade or a sweeper. By removing
The front loader 4 or the mid mount mower 5 can be mounted.

In the tractor 1, the engine 7, the clutch housing 8 and the transmission case 9 are directly connected to each other, and a front axle frame 10 is projected from the engine 7 to form a traveling vehicle body 11, and a front wheel 12 is suspended at a front portion of the traveling vehicle body 11. The front axle case 13 is supported, and the rear axle case 15 in which the rear wheel 14 is suspended is attached to the rear portion to form a two-axle four-wheel type. Reference numeral 16 is a power take-out portion provided at the bottom of the mission case 9.

A bonnet 17 that covers the engine 7 and the radiator is provided in the front part of the traveling vehicle body 11, and a rear side of the bonnet 17 is a control portion 19 having a handle 18 and the like. Hydraulic system 20 and cockpit 21 for raising and lowering the rear equipment
And are installed.

A fixed frame 24 is attached to the lower abdomen of the traveling vehicle body 11.
The fixing frame 24 includes a pair of left and right mounting plates 25 that are bolted to the clutch housing 8 and the like, a portal base 26 that projects outward from the mounting plates 25 in the left and right directions, and the portal base 26 is mounted on the portal base 26. The mast mount 27 provided and the mold material extended rearward from the portal base 26
28, and a stay 29 for fixing the rear portion of this mold member 28 to the rear axle case 15.

The front loader 4 shows only a mast 31, a boom 32 projecting forward from the upper part thereof, and a brace 33 projecting forward and downward from the mast 31, and the mast 31 is detachably erected on the mast mount 27. Then, the front end of the brace 33 is received and fixed to the brace front end support 34 fixed to the front axle frame 10.

The mid mount mower 5 has an elevating device mechanism 36 on an upper part of a mower deck 35 that surrounds the cutter, and the elevating and attaching mechanism 36 is attached to the gate-shaped base 26, the mold member 28, and the like. Power is transmitted from the power take-out shaft 37 of the power take-out section 16 to the mid mount mower 5.

The work implement coupling device 3 is a coupler fitted and fixed to the work implement 2.
40, a support frame 42 that pivotally supports the rear portion of the coupler 40 about a horizontal axis via a pivot 41, a mounting bracket 43 that is erected on the front portion of the support frame 42, and the mounting bracket 43. And a coupler 40, a hydraulic cylinder 44 provided between the mounting bracket 43 and the front portion of the traveling vehicle body 11, and a front coupling means.
It has 45 and a rear connecting means 46 for connecting the rear part of the support frame 42 and the traveling vehicle body 11.

In FIGS. 1 and 3 to 5, the working machine 2 exemplifies a snow blower, and a screw type auger is provided at the front of the blower case 51.
52, chutes 53 are provided respectively on the upper portions thereof, and a power take-in shaft 55 is provided rearward from a gear case 54 provided on the back surface.

In addition, a hollow taper box 56 is provided at the lower rear of the blower case 51.
Is fixed so as to be opened rearward, and the inside of the tapered box body 56 is a tapered fitting portion 57, which is fitted and fixed to the tip of the coupler 40. A slit 58 is formed on the upper wall 56a of the tapered box body 56.

If the working machine 2 does not have a movable part such as a blade, there is no gear case on the back of the working machine, and a member forming the fitted part 57 and a blade angle adjusting cylinder are provided.

In FIGS. 1-3, 5, and 6, the coupler 40 is a left and right side plate 60.
The partition plate 61 and the pipe material 62 are welded in the middle part of the front and rear, the pipe material 63 is welded to the front end, and the upper wall 64 is fixed to the upper part of the space surrounded by the left and right side plates 60, the partition plate 61 and the pipe material 63. The front portion is a fitting portion 65 that is tapered in the left-right direction and the thickness direction, and only the left and right side plates 60 are extended in the rear portion.

The fitting portion 65 can be fitted into the fitted portion 57 of the working machine 2 in a male and female manner, and the locking means 66 is provided therein.

The crankshaft 67 of the locking means 66 is supported by the left and right side plates 60, and the end portion protruding from the side plate 60 has a lever portion 67 in the radial direction.
a is integrally molded, and the offset part 6 at the center of the crankshaft 67
The rear portion of the latch bar 68 is engaged with 7b so as to be relatively rotatable.

The latch bar 68 has a latch portion 68a formed at an upper front portion and a pin hole portion 68b formed at a rear upper portion, and a U-shaped member 69 is fixed at a rear end portion thereof.
The crankshaft 67 is pressed by 71. Further, a cam pin 72 is laterally provided at the front portion of the latch bar 68, and both ends thereof are inserted into the cam grooves 74 of the left and right cam plates 73.

The cam plate 73 is fixed to the pipe member 63 and the upper wall 64, has a V-shaped cam groove 74, and serves as a bearing to prevent the crankshaft 67 from bending in the forward direction.

The upper wall 64 is formed with slits 75 and 76 that allow the latch portion 68a and the pin hole portion 68b of the latch bar 68 to project upward.

When the crank shaft 67 is manually rotated via the lever portion 67a after the fitting portion 65 is fitted into the fitted portion 57, the locking means 66 causes the latch bar 68 to move from the position shown by the dashed line in FIG. It moves in an arc and the front part moves upward and rearward via the cam pin 72 and the cam groove 74, and the latch part 68a moves to the slit 5 of the fitted part 57.
The engaged portion 57 is engaged with 8 and the fitted portion 57 is pulled rearward, that is, pulled to complete the male and female fitting. At this time, the pin hole 68
The pin hole 77 of the above projects above the upper wall 56a, and the reverse operation of the latch bar 68 can be prevented by inserting the pin. Further, since the crankshaft 67 elastically presses the latch bar 68 rearward via the elastic pressure rod 70 and the spring 71, the pull-fitting portion.
57 is elastically pressed in the mating direction, and due to backlash immediately after mating,
Male and female mating is more complete.

The upper wall 56a is perpendicular to the back surface of the blower case 51, and the upper wall 64 is parallel to the upper edges of the left and right side plates 60.

Between the partition plate 61 and the pipe member 62, a cylinder connecting pin 78 is provided at a position offset from the center in the left-right direction to the right side, and the piston rod 44a of the hydraulic cylinder 44 is connected to the connecting pin 78. ing.

1 to 3 and 7 to 11, the support frame 42 has a rectangular box body 80 penetrating in the front-rear direction, to which a mounting bracket 43 is fixed at the front end, and a connecting bracket 81 is fixed at the rear end.

The mounting bracket 43 is a pair of left and right side plates with a narrow top.
79, a horizontal reinforcing plate 84 is provided at an intermediate portion in the vertical direction, a pin is installed above the upper portion, and a vertical reinforcing plate 85 is vertically provided from the horizontal reinforcing plate 84 to the pin 82. Engagement pin towards
83 is projected, and the base of the hydraulic cylinder 44 is pivotally supported by the pin 82.

The connecting bracket 81 is provided with a horizontal plate 87 on the left and right side plates 86,
A pin penetrating boss portion 86a is provided so as to project from the left right side plate 86.

The front portion of the box body 80 of the support frame 42 and the mounting bracket 43,
It is inserted between the left and right side plates 60 at the rear part of the coupler 40, and a pair of left and right pivots 41 are inserted inwardly and fixed to the side plates 60, and the support frame 42 and the coupler 40 are rotatable about the horizontal axis by this pivot 41. Connected to.

The engagement pin 83 is a member constituting the front connecting means 45,
As shown in FIGS. 2 and 7 to 10, the front connecting means 45 has a pair of left and right forked brackets 88 fixed to the front axle frame 10 and a stopper 89.

The left and right two-pronged brackets 88 are bolted to the brace front end support 34, and are bolted to the front axle frame 10 together therewith, and have two-pronged members 91A and 91B that face each other with a gap 90 formed in the lower portion. The bifurcated members 91A and 91B have a divergent shape that can engage with the engagement pin 83 from above.
It also has a portion 91C, and when they are engaged, the gap 9
0 has a hole shape that penetrates forward and backward below the engaging pin 83.

The stopper 89 is formed by a wedge bolt 92 and a nut 93 that are inserted into a hole-shaped gap 90. The wedge bolt 92 is formed by welding a triangular plate to the bolt, and the wedge bolt 92 is formed in the gap 90 so as to cross the forked portion 91C. By inserting, the engagement between the bifurcated members 91A and 91B and the engagement pin 83 is locked. Reference numeral 94 denotes a tool insert for a tool 95 for turning the nut 93. As shown by the dashed line in FIG.
If it is inserted into the nut 93 and penetrates the nut 93,
95 can be used as a rotation stopper for nut 93.

The rear connecting means 46 has the connecting bracket 81 and a pair of left and right connecting members 97 made of plates which are bolted to the mounting plate 25.
A pin hole 98 is formed in the connecting member 97. In the rear portion of the support frame 42, by inserting the connecting bracket 81 between the left and right connecting members 97 and penetrating the connecting pin 99 (connecting tool) through the pin hole 98 and the boss portion 86a, as shown in FIG. Running car body
11 Connected and fixed to the lower abdomen.

FIG. 13 shows another example of the rear connecting means. This rear connecting means 46A has the left and right side walls 42a of the support frame 42A extending rearward,
Further, the boss portion 42b is formed, and the fixing plate 112 having the tubular member 111 welded to the middle or rear portion of the lower surface of the traveling vehicle body 11 is bolted, and the left and right side walls 42a are lifted to connect the boss portion 42b and the tubular member 111 to each other. It is configured to penetrate 99.

The support frame 42A shown in FIG. 13 is formed in a ladder shape instead of a box shape. Further, although the two-pronged bracket 88 and the connecting member 97 are mounted on the brace front end support 34 and the mounting plate 25 so as to be adjustable in height, they may be welded or integrally formed.

In FIGS. 1, 3, and 11, a mounting body 101 is provided on the side surface of the box body 80 of the support frame 42 in the middle thereof so as to project outward.
A control box mounting rod 102 is detachably attached to 01. The mounting body 101 and the control box mounting rod 102 are formed of square pipes, and a hydraulic hose connected to the hydraulic cylinder 44 is inserted therein. In particular, the mounting body 101 is designed not to be damaged even when the traveling vehicle 1 gets on the vehicle.

The lower part of the control box mounting rod 102 is bent into an L-shape, and the horizontal part of the lower part is fitted into the mounting body 101 so that the pin 1
It is fastened with 03 or bolts, the upper part is inclined toward the traveling vehicle body 11 side through the vertical portion, and the control box 104 is provided at the upper end. This control box 1
04 is connected to the hydraulic pump of the traveling vehicle body 11 via the hose 105, and by operating the control lever 106, pressure oil can be supplied to and discharged from the hydraulic cylinder 44.

1 to 3, 7, and 11, a transmission shaft 107 is rotatably supported by the box body 80 of the support frame 42.
07 is interlockingly connected to the power take-out shaft 37 and the power take-in shaft 55 via the universal joint shafts 108 and 109 which are expandable and contractable, and the power of the traveling vehicle 1 can be transmitted to the working machine 2. The shafts 107, 108, and 109 are not provided when the working machine 2 does not include a rotating unit such as a blade.

Next, a method of mounting the work implement connecting device 3 shown in the above embodiment will be described.

When the traveling vehicle 1 is replaced with the working machine 2 such as a snow blower from the state in which the front loader 4 or the mid mount mower 5 shown by the dashed line in FIG. 1 is selectively attached, the working machine 4 or 5 is removed.

Next, the work implement connecting device 3 is installed on the ground, the traveling vehicle 1 is moved forward so as to straddle the work implement connecting device 3, and the traveling vehicle body 11 is arranged substantially parallel to the device 3. At this time, the control box mounting rod 102 may be detached and then mounted later, but if the control box mounting rod 102 is mounted from the beginning, the front wheels 12 are steered so as not to hit. Then, the control section 19 is arranged on the side of the control box 104 so that the operator on the control seat 21 can operate the control lever 106.

After straddling the traveling vehicle 1 over the device 3, the hose 105 is connected to the hydraulic hose on the traveling vehicle 1 side, and the control box
104 is operated to extend the hydraulic cylinder 44.

When the hydraulic cylinder 44 is extended, as shown in FIG. 12,
The coupler 40 descends with respect to the support frame 42, and as a result, the coupler 40 and the support frame 42 that have been grounded to the ground are centered on the pivot 41 while the front end of the coupler 40 and the rear end of the support frame 42 are grounded. It turns into a V shape when viewed from the side. As a result, the mounting bracket 43 at the front part of the support frame 42 is lifted, and the engagement pin 83 is moved to 2
It is also engaged with the forked portion 91C of the bracket 88. Engagement pin 83
Is continued until the front wheels 12 are almost lifted.

After this, the wedge bolt 92 of the front connecting means 45 is inserted into the gap 90 in the two-pronged bracket 88 to prevent the engagement pin 83 from coming off.

After the mounting bracket 43 is attached to the traveling vehicle body 11, the hydraulic cylinder 44 is contracted to return the coupler 40 and the support frame 42 to a linear shape, and the support frame 42 is centered around the engagement pin 83 of the front coupling portion.
The rear portion is lifted, the connecting bracket 81 is superposed on the connecting member 97, and they are connected by the connecting pin 99.

This completes the attachment of the device 3 to the traveling vehicle 1, and thereafter, the traveling vehicle 1 is advanced toward the working machine 2 installed on the ground, and the tip of the coupler 40 is fitted to the fitted portion 57 of the working machine 2. Of the upper wall 5 on which the latched portion 68a of the latch bar 68 forms the fitted portion 57.
By engaging with the slit 58 of 6a, the male and female fitting of the working machine 2 and the coupler 40 is completed, and the pin is inserted into the pin hole 77 of the pin hole portion 68b protruding from the upper wall 64 to lock the male and female fitting. .

Finally, set the transmission shaft 107 to the universal joint shafts 108 and 109.
Through a power take-off shaft 37 and a power take-in shaft 55.

The universal joint shaft 108 is connected to the transmission shaft 107 and the power take-off shaft 3 before connecting the rear portion of the support frame 42 to the traveling vehicle body 11.
It may be connected with 7. Further, the working machine 2 is raised and lowered during the work by expanding and contracting the hydraulic cylinder 44 for raising and lowering the coupler.

The control box 104 may be attached to the traveling vehicle 1 side and connected to the hydraulic cylinder 44 via a hose and a coupler. Besides, the present invention is not limited to the embodiments and can be variously modified.

(Effects of the Invention) According to the present invention described in detail above, the coupler to be fitted and fixed to the working machine is rotatably supported on the front portion of the support frame so as to be rotatable around the horizontal axis and is erected on the front portion of the support frame. Since the coupler lifting cylinder is installed between the mounting bracket and the coupler, the cylinder rear part and the support frame front part can be lifted by the operation of this cylinder, and the mounting bracket that has been lifted moves the front part of the vehicle body to the front. It can be easily connected through the connecting means, and it can be done lightly without lifting heavy objects.When the cylinder is operated in reverse after the front connection, the rear part of the support frame can be lifted, and the support frame Since the front connecting portion is rocked and lifted up, it can be easily connected to the traveling vehicle body with light work.

Further, the front connecting means is composed of a two-pronged bracket fixed to the traveling vehicle body, an engagement pin fixed to a mounting bracket that engages with the front coupling means from below, and a retaining device for retaining the engagement pin from the two-pronged bracket. By doing so, the front connecting means can be connected / disconnected simply by attaching / detaching the retaining device.

Further, since the brace front end support together with the two-forked bracket and the mast mount together with the rear connecting member are provided on the traveling vehicle body, the front loader can be attached without removing the two-forth bracket and the connecting member.

Further, since the connecting member for connecting the connecting bracket provided at the rear portion of the support frame is attached using the mast attaching fixed frame, the member can be effectively used.

Furthermore, since the control box mounting rod is provided above the support frame and the cylinder control box is provided above it, the coupler lifting cylinder can be operated from above the traveling vehicle body, and work equipment connection work can be performed quickly and efficiently. The control box can be attached easily.

Further, the mounting body for mounting the control box mounting rod on the support frame allows the wheels of the traveling vehicle body to be lifted, so that the traveling vehicle body can be easily moved for coupling work. Easy to carry and work efficiency can be improved.

[Brief description of drawings]

1 to 12 show an embodiment of the present invention. FIG. 1 is an overall side view of a working machine connecting device mounted on a traveling vehicle, FIG. 2 is a side view in a detached state, and FIG. 3 is a detached state. A plan view of
FIG. 4 is a plan view showing a fitted portion of the working machine, FIG. 5 is a sectional side view of the front portion of the coupler, FIG. 6 is a plan view showing locking means of the front portion of the coupler, and FIG. 7 is FIG. VII-VII line sectional view, FIG. 8 is a view taken in the direction of arrow VIII in FIG. 7, FIG. 9 is an enlarged side view of the front connecting means, and FIG. 10 is a sectional view taken along line XX in FIG. 1 is a sectional view taken along the line XI-XI in FIG. 1, FIG. 12 is a side view for explaining a method of attaching the working machine connecting device, and FIG. 13 is a perspective view showing another example of the rear connecting means. 1 ... traveling vehicle (tractor), 2 ... work equipment, 3 ... work equipment connecting device, 4 ... front loader, 5 ... mid-mount mower, 11 ... traveling body, 24 ... fixed frame, 34 ... …
Brace front end support, 40 …… coupler, 41 …… pivot, 42…
... Support frame, 43 ... Mounting bracket, 44 ... Hydraulic cylinder, 45 ... Front connecting means, 46 ... Rear connecting means, 57 ... Fitted part, 58 ... Slit, 65 ... Fitting part, 68 …… Latch lever, 81 …… Connecting bracket, 83 …… Engagement pin, 88 ……
Two-pronged bracket, 89 ... retaining device, 91C ... two-pronged part, 92
...... Wedge bolt, 99 ...... Connecting pin (connector), 102
…… Control box mounting rod, 104 …… Control box.

Claims (6)

[Claims] 1. A working machine connecting device for removably connecting a working machine to a front part of a traveling vehicle, wherein the working machine has a fitting portion at a front end and is fitted with a fitted portion formed on the working machine by forward movement. Between the mounting bracket and the coupler, the support frame that rotatably supports the rear part of the coupler around the horizontal axis, the mounting bracket that is erected on the front part of the support frame, And a front connecting means for detachably connecting the mounting bracket to the front portion of the traveling vehicle body, and a rear connecting means for detachably connecting the traveling vehicle body at the rear portion of the support frame. Working machine coupling device. 2. The front connecting means is fixed to the lower front part of the traveling vehicle body, and has a pair of left and right two-forked brackets having two forked portions at the bottom, and the front connecting means is projected from the mounting bracket to the left and right and is lowered to the forked portions. 7. An engagement pin engageable with the lock pin, and a retainer that is detachably attached to the lower part of the fork to prevent the engagement pin engaged with the fork from coming off. The work implement connecting device according to item 1. 3. The work machine connecting device according to claim 2, wherein a brace front end support for the front loader is detachably fixed to the traveling vehicle body together with a pair of left and right brackets. 4. The rear connecting means includes a connecting bracket protruding upward from a rear portion of the support frame, a mast mounting fixing frame of a front loader fixed to a traveling vehicle body, and a connecting tool fixed to the mast mounting fixing frame. The working machine connecting device according to claim 1, further comprising a connecting member that is connected to the connecting bracket through the connecting member. 5. A control box mounting rod is provided so as to project outward and upward from a side surface of a middle portion of the support frame, and a control box for operating a cylinder that can be operated from the traveling vehicle body is provided on an upper portion of the control box mounting rod. The working machine connecting device according to claim 1, wherein 6. A mounting body on which a wheel of a traveling vehicle body can be mounted is provided on a side surface of a middle portion of the support frame so as to project outward, and a lower portion of a control box mounting rod is bent into an L-shape. The work machine connecting device according to claim 5, wherein the work machine connecting device is detachably attached to a body.