JPH08214663A - Deflector attaching structure of mower - Google Patents

Abstract

PURPOSE: To simplify release operation of a deflector for covering deck opening of a mower in attaching or detaching of a thrower in a mower capable of attaching or detaching the thrower. CONSTITUTION: A thrower S for carrying reaped lawn to a grass-collecting container is arranged in the rear of a mower M and a deflector 1 for covering an opening 37 for discharging reaped lawn is pivoted on the side 30 of a mower deck of the mower rotatably to vertical direction and a spring 5 is interposed in the pivoting part 3 and a deflector 1 is urged so as to downward rotate the deflector and a pressing member 14 is protrusively provided on the side face on the mower side of a thrower case 50 and the deflector 1 is pressed against the upper direction in attachment of a thrower.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for attaching a deflector which is constructed so that a thrower which conveys cut grass from a side of a mower can be detachably attached and guides the discharge of cut grass when the thrower is removed.

[0002]

2. Description of the Related Art Conventionally, a lawn mower is used in which a mower is attached to the front or abdomen of a traveling machine body, and grass clippings cut by the mower are transferred to a grass container arranged behind by a thrower arranged on the side of the mower. It is known. When the grass is not collected, the slower is detached for the work. At that time, the deck opening on the mower side is covered by the deflector. The deflector is pivotally supported in the vertical direction at the lateral end of the mower so that the deflector is manually rotated upward and fixed by a spring force when the sllower is attached and working. In the case of working with the thrower removed, the deflector is rotated downward and biased downward by the fulcrum of the spring.

[0003]

However, in the prior art, when the thrower is mounted, it is still held in the posture rotated upward due to the fulcrum of the spring, and when the work is done by removing the thrower, If you forget to turn the deflector downward and start the work, the deck opening remains open, so stones may be scattered by the rotation of the rotary blade, or the rotating rotary blade may be exposed from the side. It was in a dangerous state.

[0004]

The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be described. In the configuration in which the thrower that conveys the lawn grass to the grass container arranged at the rear of the mower is detachably attached to the mower, the deflector that covers the mower deck side with the opening for discharging the lawn grass is provided. It is rotatably supported in the up-and-down direction, a spring is interposed in the pivotally supporting portion to urge the deflector to rotate downward, and a pushing member is provided on the side of the mower side of the thrower case so as to project. The deflector is pressed upward when mounting.

[0005]

According to the present invention, by using the above means, the deflector is constantly urged downward by the spring, and the inner surface of the deflector is pushed by the pushing member projecting to the side of the lower when the lower is attached. When pushed and rotated upward, the deflector rotates downward according to the urging force of the spring to cover the deck opening when the thrower is removed, and the grass clippings and pebbles that are discharged during the cutting operation are scattered. You can work safely without it.

[0006]

EXAMPLES Next, examples will be described. FIG. 1 is a side view of a lawn mower tractor adopting the present invention, FIG. 2 is a plan view of a mower adopting the present invention, FIG. 3 is a gearbox cross-sectional view of the mower, and FIG. 4 is a plan view showing a thrower attachment portion to the mower. Figure, Figure 5
Is a rear view of the same, FIG. 6 is a side view of a mounting portion at the lower part of the thrower, FIG. 7 is a sectional view of a connecting portion between a holder and a fan boss, and FIG. 8 is a perspective view of a fan boss.

As shown in FIG. 1, the tractor A has a mower M on its abdomen, an engine is placed in a hood on the front of the body frame F, and the power from the engine is transmitted through a transmission (not shown). Driving the front wheels 40, 40 and the rear wheels 41, 41. In addition, the gearbox 3 of the mower M from the front axle case via the universal joint 42.
1, and drives the rotary blade 33 and the lower S. The thrower S is arranged on the right side of the seat 44, and the grass cut by the mower M is discharged to the thrower S, and the blades of the thrower S rotate to cut the grass into the grass container B through the connecting hose 43. Be transported.

The gear box 31 is shown in FIG.
As shown in FIG. 3, the mower drive shaft 4 is disposed at a substantially central portion of the mower deck 30 above the mower M, the input shaft 39 is connected to the universal joint 42, and the mower drive shaft 4 is connected via a bevel gear.
5, the power is transmitted from the pulley 32 fixed to the mower drive shaft 45 to the pulleys on a driven shaft (not shown) vertically arranged on both sides of the mower deck 30 via the belt 34, and the mower deck 30 is driven. Rotary blades 33, 33, 33 fixed to the lower end of the mower drive shaft 45 and the driven shaft in the
Is configured to rotate. The front part of the mower M bulges upward and the rotary blades 33.33.
A grass flow path for laterally transporting the grass cut by 3 is formed, and a deck opening 37 for discharging the grass is provided at the end of the grass flow path, and the outside is covered by the deflector 1 and discharged. We are guiding the lawn.

Further, as shown in FIGS. 4 and 5, a bevel gear box 35 is provided on the upper surface of the mower deck 30 on the right driven shaft, and power can be taken out from the driven shaft via the bevel gear box 35. When the thrower S is attached as described below, the power can be transmitted to the fan shaft 23 of the thrower S via the universal joint 36. The thrower S is provided with an opening for discharging grass clippings into the grass container B at the upper part of a cylindrical case 50, and is connected to the connecting hose 43. An inlet opening 50a is formed on the lower side surface of the thrower S. It is designed to be able to communicate with the deck opening 37 on the side of. Then, the mounting portion 20a of the holder 20 is fixed to the inner surface of the central portion of the thrower case 50 and arranged horizontally, and the fan shaft 23 is rotatably supported by the shaft center portion of the holder 20 via bearings 21 and 22. . One end of the fan shaft 23 projects laterally from the lower case 50, is connected to the universal joint 36, and the fan boss 24 of the lower fan 25 is fixed inside the lower case 50 at the other end.

A space between the holder 20 and the fan boss 24 is formed as shown in FIG. 7 in order to prevent dust and cutting grass from being caught in the bearing 22. That is, the groove 20b is formed on the outer peripheral surface of the end of the holder 20 on the fan side, and the bearing 2 is formed on the inner periphery of the end of the holder 20.
2 is fitted and installed inside the holder 20 at a dimension L1 from the end surface. The fan boss 24 is shown in FIG.
As shown in FIG. 9, it is configured in the shape of a polygonal column (a square column in the present embodiment), and the side walls of the lower fans 25, 25 ...
(Four in this embodiment) are fixed, and the lower fan 25
A retreat value θ is obtained, and it can be easily fastened to the boss. An annular groove 24b is formed on the end surface of the fan boss 24 on the holder side, and the outer frame portion 24 is formed at the four corners.
a. 24a ... Are provided in a protruding manner, and a bearing abutting portion 24c projecting in the axial direction is formed inside.

Then, the fan boss 24 is inserted into the fan shaft 23, and the nut 26 that is screwed onto the fan shaft 23 is tightened from the side surface of the fan boss 24, whereby the outer frame portions 24a, 24a. · Formed with the groove 20b,
A dimension L2 wraps between the holder 20 and the fan boss 24.
The four end faces are opposed to each other with a sufficiently small clearance L5 between the dimensions L3 and a sufficiently small clearance L6 between the dimensions L7.

With such a complicated structure, it becomes difficult for dust and the like to enter, and since a clearance is provided between the two, the bearing contact surface 24c is the bearing 2
2, the end surface of the holder 20 and the side surface of the bearing 22 are in contact with the ring surface 24 of the fan boss 24.
It is possible to rotate the lower fan 25 without contacting the bearing b and without wearing the bearing 22, so that a reliable cantilever support structure for the lower fan 25 can be configured. Therefore, even if a dustproof collar or the like is not provided as a separate component, an economical and durable dustproof structure can be obtained. However, in this embodiment, the fan boss 24 projects outward in the radial direction, but the holder 20 may be configured to project outward. In addition to the fan support portion, as shown in FIG. 3, the dustproof structure can be provided not only between the holder 46 of the mower drive shaft 45 and the boss 33a of the rotary blade 33 but also as described above.

Next, the mounting structure of the deflector 1 and the lower S according to the present invention will be described with reference to FIGS.
A rotation fulcrum bracket 7 is fixed to the side surface of the front wheel support 6 that supports the mower front wheel 15 on the cutting grass release side of the mower, and a fulcrum shaft 9 is projected upward from the rotation fulcrum bracket 7.
The fixed cylinder 8 is fixed to the side surface of the rear wheel support 17 that supports the mower rear wheel 16. On the other hand, the lower case 50 of the lower S
The outer side of the mower side is a "U" -shaped reinforcement frame 1 in rear view.
1 is fixed in the horizontal direction, and a cylindrical thrower mounting rotating portion 12 is provided at the front portion of the reinforcing frame 11 and a thrower mounting fixing portion 13 is provided at the rear portion thereof in accordance with the positions of the fulcrum shaft 9 and the fixed barrel 8. The securing lever 10 is fixed, and the securing lever 10 is fitted and inserted into the thrower mounting and securing portion 13. Further, a pushing member 14 made of a U bolt is provided at a position above the middle portion of the reinforcing frame 11 so as to project from the thrower case 50 toward the mower side. Has been done.

A support 3 is laterally mounted between the rear surface of the front wheel support 6 and the mower deck 30, and a pivot 4 is mounted on the support 3. On the other hand, a fixing plate 2 is fixed to the front end of the deflector 1, and the fixing bracket 2 is attached to the fixing plate 2.
a. 2a are formed, and the mounting brackets 2a, 2a are rotatably supported by the pivot shaft 4. The pivot 4
A torque spring 5 is externally fitted on the upper side, one end of the torque spring 5 is locked to the support body 3, and the other end is brought into contact with the fixed plate 2.
The torque spring 5 constantly urges the deflector 1 to rotate downward, and the deflector 1 is maintained in a state of guiding the discharge of the lawn grass when the thrower S is not attached.

When the thrower S is attached to the mower M with such a structure, the entire thrower S is lifted in the left-right direction, and the thrower attachment turning portion 12 is inserted into the fulcrum shaft 9 arranged at the front portion of the mower deck 30. , Deflector 1 from that state
When the pusher member 14 abuts on the inner side surface of the deflector 1 when the lower member S is rotated backward about the fulcrum shaft 9 and the swinging member 14 is rotated, the biasing force of the torque spring 5 is applied. On the contrary, as the thrower S is turned rearward, the deflector 1 is turned while being pushed upward, and when the fixed cylinder 8 of the thrower is rotated to the position of the thrower mounting fixing portion 13, the fixing lever 10 is fixed. Can be fixed to the side of the mower M by inserting
The deflector 1 remains lifted as shown by the solid line in FIG.

On the contrary, when removing the lower S, the fixing lever 10 is removed from the fixed cylinder 8 and the lower S is rotated forward, so that the inner surface of the deflector 1 is pushed onto the pushing member 14 by the urging force of the torque spring 5. When the swinger S is rotated downward while abutting, the thrower S is removed, and as shown by 1'indicated by a chain double-dashed line in FIG. 4, the discharge guide posture is obtained and the deck opening 37 of the mower M is prevented from being exposed. It is configured.

[0017]

Since the present invention is constructed as described above, it has the following effects. That is, since the deflector is always urged to rotate downward, the deflector is left as it is when the deflector is used and is raised upward when the thrower is used, so that the use state can be easily switched.
Since the structure is a simple structure using a torque spring, it can be inexpensively constructed.When the thrower is removed, the deflector is surely rotated downward, and the deck opening is covered, so that the rotary is covered. It is possible to work safely without the grass clippings and stones being discharged by the blades.

[Brief description of drawings]

FIG. 1 is a side view of a lawn mower tractor employing the present invention.

FIG. 2 is a plan view of a mower adopting the present invention.

FIG. 3 is a gearbox sectional view of the mower.

FIG. 4 is a plan view showing a portion for attaching the thrower to the mower.

FIG. 5 is a rear view of the same.

FIG. 6 is a side view of a mounting portion at a lower portion of the thrower.

FIG. 7 is a sectional view of a connecting portion between a holder and a fan boss.

FIG. 8 is a perspective view of a fan boss.

FIG. 9 is a side view of a lower fan mounting portion.

[Explanation of symbols]

 M mower S thrower B grass container 1 deflector 3 pivot 5 torque spring 14 pushing member 30 mower deck 37 opening

Claims (1)

[Claims] 1. In a structure in which a thrower for transporting cut grass to a grass container arranged at the rear of the mower is detachably arranged on the mower, an opening for discharging the cut grass is provided on the side of the mower deck of the mower. A deflector to be mounted is pivotally supported in a vertically rotatable manner, a spring is interposed in the pivotal portion to urge the deflector to pivot downward, and a pushing member is projected to the side surface of the thrower case on the mower side. Mower deflector mounting structure that is installed and pushes the deflector upward when mounting the thrower.