JPH04237418A - Device for connecting tractor mower - Google Patents

Abstract

PURPOSE:To stand up a mower deck vertically against the ground for reaping, to maintain the deck in an upright attitude and to facilitate maintenance by hanging the mower deck 3 with a lift arm 2. CONSTITUTION:A lift arm 2 is equipped with one longitudinal part of a mower deck 2 vertically and rotatably around a shaft 4 in the horizontal direction. Between the lift arm 2 and the mower deck 3, controlling links 5 and 6 to switch a reaping attitude A and an upright attitude B of the mower deck 3 are installed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting device for a tractor mower that is connected to the front or rear of a tractor body to cut grass.

0002

[Prior Art and Problems to be Solved by the Invention] A mower deck connected to a tractor body has a mower deck that is open on the mowing ground side and the mower blade is disposed on the mower deck. When removing grass wrapped around the mower deck or replacing a damaged mower blade, remove part of the cover that covers the top of the mower deck, or first remove the mower deck from the vehicle body and then remove the mower deck from the back side. However, the operation is troublesome and requires a lot of effort. Therefore, the present invention aims to facilitate the above-mentioned maintenance by switching the mower deck from a reaping position along the reaping ground to a standing position perpendicular to the reaping ground with a simple configuration and operation. It is something to do.

0003

[Means for Solving the Problems] The present invention provides a lift arm 2 that rotates up and down with respect to a tractor body 1, with one front and rear end of a mower deck 3 movable up and down about a horizontal shaft 4. Between the lift arm 2 and the mower deck 3, regulation links 5 and 6 are provided for switching the mower deck 3 between a mowing posture A along the mowing ground and a standing posture B standing perpendicular to the mowing ground. The structure of the tractor mower coupling device is as follows.

0004

[Operations and Effects of the Invention] When the mower deck 3 is attached to the lift arm 2 and the regulating links 5 and 6 are operated to set the mowing posture A, the mower deck 3 rotates around the axis 4 with respect to the lift arm 2. It rotates to the mowing position A along the horizontal mowing ground, and by raising and lowering the lift arm 2 in this state, the lower surface of the mower deck 3 approaches the mowing ground when descending, and grass can be harvested. can. Alternatively, it can be raised as it is to take a non-reaping position.

When the control links 5 and 6 are operated to allow the mower deck 3 to rotate downward around the shaft 4 by its own weight and the lift arm 2 is raised, the shaft 4 of the mower deck 3 is raised.
As the part rises, the opposite side hangs downward, and assumes a vertical posture B with respect to the cutting ground. At this time, since the regulating links 5 and 6 maintain the mower deck 3 in the standing posture B, the mower deck 3
The posture can be maintained safely even during maintenance.

In this way, the mower deck 3 can be switched between the reaping position A and the standing position B by operating the regulation links 5 and 6 and raising and lowering the lift arm 2. In the standing position B, the mower deck Since the abdomen of the patient 3 is completely exposed to the front, maintenance is easy to perform, and furthermore, this standing posture B is stably maintained by the regulating links 5 and 6, so that safe work can be performed.

[0007]

[Embodiment] In Figs. 1 and 2, a pair of left and right lift arms 2 are provided on the front side of a tractor body 1 so as to be movable up and down about a lift axis. Attach the bracket 8 at the top of the front end of the mower deck 3 so that it can rotate freely. This lift arm 2 has a socket arm 9 at its base on the side of the vehicle body 1, and is provided in the shape of a rectangular pipe so as to be extendable and retractable.
It is supported by a shaft. The lift arm 2 is extended, contracted, and fixed to the socket arm 9 by inserting and removing a U-shaped pin 10 that engages between the fitting portions of the two arms 9 and 2. has three pin holes 11, 12, and 13 in the front and back, insert the long base 14 of the U-shaped pin 10 into the pin hole 12 in the center, and insert the short tip 15 into the front and rear pin holes 11 and 13. The configuration is such that it can be inserted in place of the . Further, on the lift arm 2 side, there is a long hole 16 into which the base 14 fits, and this long hole 16.
Pin holes 17 and 18 to which the tip end 15 is engaged are provided at the front and rear of the pin holes 17 and 18, and the lift arm 2 is extended and contracted relative to the socket arm 9 by the length of the elongated hole 16, and each position of the extension and contraction is set to the pin 1.
The tip 15 of 0 can be replaced and locked in the pin hole 17 or 18.

The lift arm 2 is raised and lowered by a hydraulic lift cylinder 19 provided on the vehicle body 1 side and a bell crank 20 rotated by the expansion and contraction of the lift cylinder 19.
This is done by a rod 21 that connects the bell crank 20 and the socket arm 9, and the like. 34 is a long hole of this rod 21, which engages and connects the pin 25 of the bell crank 20.

The lift arm 2 has a contact pressure surface 24 that comes into contact with a stopper surface 22 formed at the tip of the socket arm 9 by sliding on the socket arm 9.
A stopper 23 is provided to be rotatable around a horizontal pin 25, and a long hole 27 at the tip of the bending link 5 is fitted into the upper part of the stopper 23 by means of a link pin 26. Further, the tip of the bending link 6, which is bendably connected to the bending link 5 by a pin 28, is connected to a bracket 29 protruding from the rear of the upper surface of the mower deck 3, and by bending and expanding the bending links 5 and 6, The mower deck 3 is configured to be switchable between a reaping posture A in which it almost follows the lift arm 2 and a standing posture B in which it hangs downward with respect to the lift arm 2.

[0010] Furthermore, the relationship between the pin 25 and the regulation link 5 is as follows:
When the regulating link 5 is positioned on the distal end side by sliding guidance by the pin 26 of the elongated hole 27, the distal end of the regulating link 5 is not engaged with the pin 25 and can freely rotate; When the hole 27 is guided deeply relative to the pin 26, the tip of the regulation link 5 is in a relationship that can engage with the upper or lower side of the pin 25, and the tip of the regulation link 5 is placed above the pin. engaged state, i.e. restriction links 5, 6
In the straight-line orientation, the regulating links 5 and 6 are configured not to bend unless they are bent upward manually or the like. Reference numeral 30 designates a link stopper that prevents the regulating links 5 and 6 from bending downward from a straight position, and is provided at the end of the link 5 on the pin 28 side.
It can be locked on the rotating periphery of the

[0011] The mower deck 3 has a plurality of rotary cutting blades disposed inside thereof, which are interlocked by a power output shaft from the vehicle body 1 side. A pair of left and right gauge wheels 31 and 32 are provided on the front and rear sides of the mower deck 3 and are grounded to maintain a constant cutting height. When performing reaping work, the tip 15 of the pin 10 is inserted into the front pin hole 11, and when the lift arm 2 is pushed relatively toward the socket arm 9, the tip 15 of the pin 10 is inserted into the spring 33. It is engaged with the pin hole 17 of the lift arm 2 by the elastic force. At this time, the stopper 22 surface and the contact pressure surface of the stopper 23 are brought into contact with each other,
The stopper 23 is rotated around the pin 25 to move the pin 26 connecting the regulation link 5 upward. When the mower deck 3 is lowered to the ground by the lift cylinder 19 with the regulating links 5 and 6 bent upward, the front and rear gauge wheels 31 and 32 are brought into contact with the ground, resulting in a reaping attitude. In this state, the end of the regulation link 5 on the stopper 23 side is in a state where it can engage with the lower side of the pin 25, so that the forward rotation of the regulation link 5 is restricted within a predetermined range, and if the lift Even when the arm 2 is raised and the mower deck 3 is lifted, the mower deck 3 is maintained in the reaping posture A and does not rotate to the standing posture B.

When the mower deck 3 is placed in the standing position B, the tip end 11 of the pin 10 is reattached to the pin hole 13, and the lift link 2 is pulled forward relative to the socket arm 9. The tip portion 11 is engaged with the pin hole 18 on the rear side. At this time, the stopper surface 22 and the stopper 23
The contact pressure surface 24 of the stopper 23 is opened, and the stopper 23 becomes freely rotatable around the pin 25. When the lift arm 2 is raised to lift the mower deck 3, the shaft 4 at the front end is lifted up, resulting in a standing posture B with the gauge wheel 32 on the rear side grounded, and the regulation links 5 and 6 are moved in a straight line. The upper end of the regulating link 5 is located above the pin 25. Even if the lift arm 2 is lowered in this state, the regulating links 5 and 6 are not bent upward, nor are they bent downward by the link stopper 30, so that the mower deck 3 maintains the standing posture B. In this standing posture B, the lower open surface of the mower deck 3 faces the front.

[0013] Furthermore, the regulation link 5 and the stopper 23
The relationship between the upper limit and the lower limit of the rotational position of the regulation link 5 may be fixed or released by inserting or removing a pin. 3 and 4, the difference from the above example is that the configurations of the front and rear gauge wheels 31, 32 are interlocked by rods 36 on both the left and right sides, and the traveling direction of the wheels 37 on the tractor body 1 side is changed. , each of these gauge foils 3
1 and 32 are steered in a tangential direction with respect to a steering circle having a steering radius E centered at a point D on an extension line C of the axle 38. Further, the front gauge wheel 31 has casters 39 and is supported under the steering shaft 40, and the rear gauge wheel 32 is supported directly below the steering shaft 41. Reference numeral 47 denotes a frame to which each of these gauge wheels 31 and 32 is attached, and is fixed to the upper surface of the mower deck 3. A roller 42 is provided at the lower part of the front end of the mower deck 3, and is in contact with the protruding cutting ground to prevent the front end of the mower deck 3 from plunging into the ground. 43 is the power take-off shaft on the vehicle body 1 side, 44 is the transmission case on the mower deck 3 side, 45 is this input shaft, 46
is an interlocking shaft that connects the power output shaft 43 and the input shaft 45.

[Brief explanation of the drawing]

The figure shows an embodiment of the invention.

FIG. 1 is a side view showing some functions.

FIG. 2 is a partial perspective view of FIG. 1;

FIG. 3 is a plan view of a partial embodiment.

FIG. 4 is a side view of FIG. 3.

[Explanation of symbols]

1 Tractor body 2 Lift arm 3. More Deck 4 axis 5. Regulation link 6. Regulation link A Reaping posture B Standing posture

Claims (1)

[Claims] 1. A lift arm 2 that rotates up and down with respect to a tractor body 1 is provided with one front and rear end of a mower deck 3 so as to be movable up and down about a horizontal shaft 4, and the lift arm 2 and the mower deck 3 are connected to each other. In between, regulation links 5 and 6 are provided for switching the mower deck 3 between a mowing posture A along the mowing ground and a standing posture B standing perpendicular to the mowing ground.
A tractor mower coupling device comprising: