JPH06296415A - Lawn mower - Google Patents

Abstract

PURPOSE:To Keep relative angle of a transmission belt to a tension pulley to nearly constant regardless of lifting and lowering of mower. CONSTITUTION:A mower 4 is attached to a traveling machine body so as to freely enable lifting and lowering operation by a hanging-down link capable of freely oscillating before and behind and a deck-attached link 13 for controlling oscillation before and behind the mower 4 is vertically swingably installed between the traveling machine body and the mower 4, and a transmission belt 16 is installed over a pulley 14 on driving side 14 of a traveling machine body and a pulley 15 on the side to be driven of the mower 4, and a tension pulley 17 to the transmission belt 16 is provided and an oscillating supporting point 13a on machine body side of the deck-attached link 13 is arranged in the neighborhood of the pulley 14 on the driving side, and a oscillating supporting point on mower side 13b is arranged in the neighborhood of the pulley 15 on the side to be driven and the tension pulley 17 is attached to the deck-attached link 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mounts a mower on a traveling machine body so that it can be lifted and lowered by a suspension link that can swing back and forth.
An anti-sway link that restricts the forward and backward swing of the mower is installed between the traveling machine body and the mower so that it can swing up and down, and a transmission belt is installed between the drive side pulley of the traveling machine body and the passive side pulley of the mower, and tension to the transmission belt A lawn mower equipped with pulleys, the swing-side fulcrum of the steady rest is located near the drive-side pulley, and the moor-side swing fulcrum of the steady rest is located near the passive-side pulley. Regarding improvement of mounting structure.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, a transmission belt 16 extending over a drive side pulley 14 and a passive side pulley 15 is mounted on a deck 4a of a mower 4 mounted on a traveling machine body 3 by a suspension link 12 and a steady rest link 13. The tension pulley 24 is attached so as to be swingable around the support shaft 25 and urged by a spring in the tension action direction, and the mower 4 is moved up and down by adjusting the vertical angle of the link attachment member 8 by the operation lever 9. Was configured into.

[0003]

However, as the mower is moved up and down, the relative angle of the transmission belt, which changes the ground angle with respect to the tension pulley whose ground angle is substantially constant, changes greatly, and the rotary shaft core of the tension pulley is changed. Due to the drive of the transmission belt in a state where the inclination of the transmission belt with respect to is strong,
There is a risk of uneven wear of the transmission belt due to the tension pulley, and there is room for improvement in terms of improving the durability of the transmission belt. An object of the present invention is to maintain the relative angle of the transmission belt with respect to the tension pulley substantially constant regardless of the elevation of the mower, and to effectively suppress uneven wear of the transmission belt due to the tension pulley. .

[0004]

A feature of the present invention is that a mower is attached to a traveling machine body by a hanging link that can be rocked back and forth so that the mower can be moved up and down, and a steady rest link that restricts the rocking of the mower back and forth is provided. It is erected vertically between the mower and the mower, and a transmission belt is laid between the drive side pulley of the traveling machine and the passive side pulley of the mower, and a tension pulley for the transmission belt is provided. In a lawnmower in which the mower side swing fulcrum of the steady rest link is disposed near the drive side pulley and near the passive side pulley, the tension pulley is attached to the steady rest link.

[0005]

In other words, since the body-side swing fulcrum of the steady rest link is located near the drive-side pulley and the mower-side swing fulcrum is near the passive-side pulley, the drive belt extending over the drive-side pulley and the passive-side pulley is There is almost no change in the relative angle of the steady rest link due to the elevation of the mower.Therefore, if the tension pulley is attached to the steady rest link, the relative angle of the transmission belt with respect to the tension pulley can be maintained almost constant regardless of the elevation of the mower. Wear of the transmission belt due to the tension pulley can be effectively suppressed.

[0006]

As a result, it becomes possible to provide a lawnmower that is more excellent in terms of improving the durability of the mower driving transmission belt, which can sufficiently suppress the deterioration of the mower driving transmission belt due to the tension pulley.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, a mower 4 is mounted on a traveling machine body 3 having a pair of left and right caster-type front wheels 1 and a pair of left and right rear wheels 2 which can be normally and reversely stopped. It is arranged between the front and rear wheels 1 and 2, and a driving part 5 for driving the mower 4 and the rear wheels 2 is mounted on the rear end part, and a driving seat 6
Is provided immediately in front of the driving part 5, and the steering handle 7 is provided so as to be swingable back and forth, so that either the walking steering posture extending to the rear of the aircraft or the boarding steering posture extending to the front of the driver's seat 6 is provided. The crab can be freely switched to form a lawn mower for both boarding and walking. The steering handle 7 is almost U in a plan view.
It is formed in a character shape and attached to the traveling machine body 3 at both ends, and the rattling of the steering handle 7 is suppressed by the double-supported structure, and the side view shape of the steering handle 7 is formed into a substantially doglegged shape. , Steering handle 7 for getting on and off the driver's seat 6
Is configured so that it does not get in the way. As shown in FIG. 3 and FIG. 4, four link attachment members 8 arranged side by side in the front-rear, left-right direction are attached to the traveling machine body 3 so that the vertical angle can be changed, and the rod is placed in a state in which the operation lever 9 swings integrally. 1
0 or the rotary shaft 11 and the linking members 8 are attached to the respective linking members 8 so as to be swingable back and forth.
Is suspended and supported, and the mower 4 is moved up and down by adjusting the vertical angle of the link attachment member 8 by the operation lever 9. A pair of left and right steady rest links 13 for restricting the forward and backward swing of the mower 4 are vertically oscillated between the traveling machine body 3 and the mower 4, and the body side swing fulcrum 13a of the steady rest link 13 is attached to the traveling machine body 3. The mower-side swinging fulcrum 13b of the steady rest link 13 is disposed near the attached drive-side pulley 14 and near the passive-side pulley 15 attached to the mower 4. Drive side pulley 14 and passive side pulley 1
The transmission belt 16 is installed over 5
The tension pulley 17 is attached to a tension arm 19 that is swingably attached to the steady rest link 13 while being biased by a spring 18 in the tension acting direction.
The tension pulley 1
It is configured to suppress uneven wear of the transmission belt 16 due to No. 7. The power from the passive pulley 15 is transmitted to the central rotary cutter drive shaft 20 and is transmitted to the left and right rotary cutter drive shafts 22 and 23 by the power distribution transmission belt 21. The three rotary cutters 4b are driven.

[Other Embodiments] The specific structure and mounting position of the mower 4 can be appropriately changed, and the number and arrangement of the suspension links 12 supporting the mower 4 can be appropriately changed. The traveling machine body 3 can be appropriately changed in the number of wheels, steering type, and the like. The number of the steady rest links 13 for the mower 4 can be appropriately changed. The type of lawn mower does not matter.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

[Figure 1] Overall side view of the lawn mower

[Figure 2] Overall plan view of the lawn mower

[Fig. 3] Side view of main parts

FIG. 4 is a plan view of a main part.

FIG. 5 is a side view of a main part of a conventional example.

[Explanation of symbols]

 3 Travel Aircraft 4 Mower 12 Suspension Link 13 Steady Link 13a Airframe-side Support Point 13b Mower-side Support Point 14 Drive Side Pulley 15 Passive Side Pulley 16 Transmission Belt 17 Tension Pulley

[Procedure amendment]

[Submission date] June 3, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Title of Invention] Lawn mower

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mounts a mower on a traveling machine body so that it can be lifted and lowered by a suspension link that can swing back and forth.
A deck mounting link that controls the forward and backward swinging of the mower is erected vertically between the traveling machine body and the mower, and a transmission belt is installed over the drive side pulley of the traveling machine body and the passive side pulley of the mower, and the tension to the transmission belt is set. A lawn mower in which a pulley is provided, and the swing fulcrum of the deck mounting link on the machine side is located near the drive pulley, and the swing fulcrum of the deck mounting link is located near the passive pulley. Regarding improvement of mounting structure.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, a transmission belt 16 extending over a drive side pulley 14 and a passive side pulley 15 is mounted on a deck 4a of a mower 4 mounted on a traveling machine body 3 by a suspension link 12 and a deck mounting link 13. The tension pulley 24 is attached so as to be swingable around the support shaft 25 and urged by a spring in the tension action direction, and the mower 4 is moved up and down by adjusting the vertical angle of the link attachment member 8 by the operation lever 9. Was configured into.

[0003]

However, as the mower is moved up and down, the relative angle of the transmission belt, which changes the ground angle with respect to the tension pulley whose ground angle is substantially constant, changes greatly, and the rotary shaft core of the tension pulley is changed. Due to the drive of the transmission belt in a state where the inclination of the transmission belt with respect to is strong,
There is a risk of uneven wear of the transmission belt due to the tension pulley, and there is room for improvement in terms of improving the durability of the transmission belt. An object of the present invention is to maintain the relative angle of the transmission belt with respect to the tension pulley substantially constant regardless of the elevation of the mower, and to effectively suppress uneven wear of the transmission belt due to the tension pulley. .

[0004]

SUMMARY OF THE INVENTION A feature of the present invention is that a mower is attached to a traveling machine body by a suspension link that can be rocked back and forth so that the mower can be moved up and down, and a deck mounting link for restricting forward and backward rocking of the mower. Vertically swingably installed between the mower and the mower, and a transmission belt is installed over the drive side pulley of the traveling machine and the passive side pulley of the mower, and a tension pulley is provided for the transmission belt, and the machine side rocking fulcrum of the deck mounting link is installed. The tension pulley is attached to the deck attachment link in the lawn mower in which the mower side swing fulcrum of the deck attachment link is disposed near the drive side pulley and the passive side pulley, respectively.

[0005]

In other words, since the body-side swing fulcrum of the deck mounting link is located near the drive-side pulley and the mower-side swing fulcrum is located near the passive-side pulley, the transmission belt extending over the drive-side pulley and the passive-side pulley is There is almost no change in the relative angle of the deck mounting link when the mower is raised or lowered.
When the tension pulley is attached to the deck attachment link, the relative angle of the transmission belt with respect to the tension pulley can be maintained substantially constant regardless of the elevation of the mower, and the abrasion of the transmission belt due to the tension pulley can be effectively suppressed.

[0006]

As a result, it becomes possible to provide a lawnmower that is more excellent in terms of improving the durability of the mower driving transmission belt, which can sufficiently suppress the deterioration of the mower driving transmission belt due to the tension pulley.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, a mower 4 is mounted on a traveling machine body 3 having a pair of left and right caster-type front wheels 1 and a pair of left and right rear wheels 2 which can be normally and reversely stopped. It is arranged between the front and rear wheels 1 and 2, and a driving part 5 for driving the mower 4 and the rear wheels 2 is mounted on the rear end part, and a driving seat 6
Is provided immediately in front of the driving part 5, and the steering handle 7 is provided so as to be swingable back and forth, so that either the walking steering posture extending to the rear of the aircraft or the boarding steering posture extending to the front of the driver's seat 6 is provided. The crab can be freely switched to form a lawn mower for both boarding and walking. The steering handle 7 is almost U in a plan view.
It is formed in a character shape and attached to the traveling machine body 3 at both ends, and the rattling of the steering handle 7 is suppressed by the double-supported structure, and the side view shape of the steering handle 7 is formed into a substantially doglegged shape. , Steering handle 7 for getting on and off the driver's seat 6
Is configured so that it does not get in the way. As shown in FIG. 3 and FIG. 4, four link attachment members 8 arranged side by side in the front-rear, left-right direction are attached to the traveling machine body 3 so that the vertical angle can be changed, and the rod is placed in a state in which the operation lever 9 swings integrally. 1
0 or the rotary shaft 11 and the linking members 8 are attached to the respective linking members 8 so as to be swingable back and forth.
Is suspended and supported, and the mower 4 is moved up and down by adjusting the vertical angle of the link attachment member 8 by the operation lever 9. A pair of left and right deck mounting links 13 for restricting forward and backward swinging of the mower 4 are vertically swingably installed between the traveling body 3 and the mower 4, and the body side swinging fulcrum 13a of the deck mounting link 13 is attached to the traveling body 3. Drive side pulley 1 attached
4 and the mower side swinging fulcrum 13b of the deck mounting link 13 is arranged near the passive side pulley 15 attached to the mower 4. A transmission belt 16 is installed over the drive side pulley 14 and the passive side pulley 15, and a tension pulley 17 for the transmission belt 16 is swingably attached to the deck attachment link 13 while being urged by a spring 18 in a tension acting direction. It is attached to the arm 19 and is configured so that the relative angle between the tension pulley 17 and the transmission belt 16 is kept substantially constant regardless of the elevation of the mower 4, and uneven wear of the transmission belt 16 by the tension pulley 17 is suppressed. The power from the passive pulley 15 is transmitted to the rotary cutter drive shaft 20 in the center, and the left and right rotary cutter drive shafts 2 are driven by the power distribution transmission belt 21.
2 and 23, the three rotary cutters 4b in the deck 4a are driven.

[Other Embodiments] The specific structure and mounting position of the mower 4 can be appropriately changed, and the number and arrangement of the suspension links 12 supporting the mower 4 can be appropriately changed. The traveling machine body 3 can be appropriately changed in the number of wheels, steering type, and the like. The number of deck mounting links 13 for the mower 4 can be changed as appropriate. The type of lawn mower does not matter.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

[Figure 1] Overall side view of the lawn mower

[Figure 2] Overall plan view of the lawn mower

[Fig. 3] Side view of main parts

FIG. 4 is a plan view of a main part.

FIG. 5 is a side view of a main part of a conventional example.

[Explanation of Codes] 3 Travel Aircraft 4 Mower 12 Suspension Link 13 Deck Attachment Link 13a Airframe Side Support 13b Mower Side Support 14 Drive Side Pulley 15 Passive Pulley 16 Transmission Belt 17 Tension Pulley

Claims (1)

[Claims] 1. A steady rest link (6) for attaching a mower (4) to a traveling machine body (3) so that the mower (4) can be lifted and lowered by a suspension link (12) swingable back and forth, and restricting the back and forth swing of the mower (4). 13) the traveling body (3) and the mower (4)
And a transmission belt (16) installed between the drive side pulley (14) of the traveling machine body (3) and the passive side pulley (15) of the mower (4). Tension pulley (17) for (16)
Is provided near the drive side pulley (14), and the mower side swing fulcrum (13b) of the steady rest link (13) is provided near the drive side pulley (14). In the lawn mowers respectively arranged near the passive side pulley (15), the tension pulley (1
A lawn mower in which 7) is attached to the steady rest link (13).