JPH04179404A - Lawn mower - Google Patents

Abstract

PURPOSE:To prevent the spill over of mowed lawn grass from a full grass bag by stopping the driving of a cutter deck with a cutter deck drive-stopping means when a detection means detects the full-bag state of a grass bag provided with a pressing mechanism. CONSTITUTION:Lawn grass cut with a cutter deck 1 and supplied to a grass bag 2 is pressed with a pressing mechanism 43. When the grass bag is filled with the lawn grass and the full-detection means 58 is actuated, the driving of the cutter deck is stopped with a means 21 for stopping the drive of cutter deck.

Description

Detailed Description of the Invention A2 Object of the Invention (1) Industrial Application Field The present invention relates to a lawn mower that compresses and stores grass cut by a cutter deck in a glass hanger, and in particular, The present invention relates to a lawnmower equipped with a fullness detection means for detecting whether the grass inside the lawnmower is full.

(2) Prior Art Conventionally, as such a lawn mower, one described in Japanese Utility Model Application Publication No. 63-50531 is well known. This lawn mower is equipped with a spiral connected to the engine and driven to rotate on the top of the grass bag that stores the cut grass, and this spiral compresses the grass in the grass hang to increase the storage capacity. . When the grass in the grass hang becomes full and the reaction force that the spiral receives from the grass exceeds a predetermined value, the fullness detection means is activated to stop driving the spiral.

Furthermore, the lawn mower described in Japanese Utility Model Application Publication No. 188422/1988 includes a rotating member that is installed on the top of a grass hanger and is driven by a motor, and the reaction force that the rotating member receives from the grass causes the grass hanger to The device is configured to detect fullness and issue an alarm.

(3) Problems to be Solved by the Invention In the former lawn mower, the rotation of the spiral stops when the grass in the grass hanger becomes full, but unless the cutter deck is stopped, the cutter deck remains as it is. Due to the continuous rotation, cut grass is continuously supplied into the grass hang and there is a risk that the grass bag may overflow. Furthermore, in the latter type of lawn mower, if the operator does not notice the alarm or inadvertently forgets to stop the canter deck, there is a risk that the grass may overflow from the grass bag.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a lawn mower that can reliably prevent grass from overflowing from a filled grass bag.

B9 Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention provides a cutter deck for mowing lawns, a grass bag for storing the grass cut by the cutter deck, and a grass bag for storing the grass cut by the cutter deck. In the lawn mower, the lawn mower is equipped with a compression mechanism that compresses the grass stored in the bag, and a fullness detection means that detects whether the grass stored in the grass bag is full. The first feature is that the cutter deck drive stop means is provided for stopping the drive of the cutter deck when the cutter deck is detected.

In addition to the above-mentioned first feature, the present invention has a second feature that the present invention includes compression mechanism drive stop means for stopping the drive of the compression mechanism when the fullness detection means detects that the grass is full. do.

Furthermore, in addition to the above-mentioned first feature, the present invention provides that the compression mechanism is driven by an eccentric cam mechanism that converts the rotation of the axle into reciprocating motion, and a Bowden wire that transmits the output of the eccentric cam mechanism. is the third feature.

(2) Effect According to the first feature of the present invention having the above-described configuration, the grass cut by the cutter deck driven by the drive source and supplied into the grass bag is fed into the grass bag. Compressed by a compression mechanism to increase storage capacity. When the grass in the grass bag becomes full and the fullness detection means is activated, the cutter deck drive stop means stops driving the cutter deck and stops the supply of grass to the grass bag, so that the grass overflows from the grass hang. This will be prevented.

According to the second feature of the present invention, the drive of the cutter deck is stopped due to the operation of the fullness detection means, and the supply of grass is stopped, and at the same time, the drive of the compression mechanism is stopped, so that the grass inside the grass bag causes the compression mechanism to stop. This prevents an excessive load from being applied to the

Furthermore, according to the third feature of the present invention, when the axle rotates as the lawnmower runs, the rotational motion of the axle is converted into reciprocating motion by the eccentric cam mechanism provided on the axle, and the reciprocating motion is transmitted through the Bowden wire. is transmitted to the compression mechanism. This makes it possible to simplify the structure of the drive system of the compression mechanism.

(3) Examples Hereinafter, the present invention will be explained in detail based on the drawings.

Figures 1 to 4 show one embodiment of the present invention.
The figure is a schematic plan view of the lawn mower, and the second figure is the one shown in Figure 1.
FIG. 3 is a sectional view taken along the line ■--■ in FIG. 1, and FIG. 4 is an electric circuit diagram of the cutter deck drive stop means and the compression mechanism drive stop means.

As shown in Figures 1 and 2, this lawn mower is a four-wheeled riding lawn mower, with left and right front wheels Wf driven by an engine mounted at the front of the vehicle body, and left and right driven wheels. It has a rear wheel Wr.

A cutter deck 1 driven by the engine is provided at the lower center of the vehicle body, and a grass bag 2 for storing the grass cut by the cutter deck 1 is provided at the rear of the vehicle body.

As is clear from FIG. 3, the cutter deck 1 includes a cutter housing 3 having an open lower surface and a generally elliptical shape in plan view. A right rotating shaft 8 supported via the rotating shaft 5 and a bearing 6.7 is vertically provided, and a pair of left and right cutter blades 9.10 for mowing the lawn are fixed to the lower ends of both rotating shafts 5.8. be done. A PTO shaft 12 that is driven via a hydraulic clutch 11 is disposed at the rear of the lower surface of the engine E.

An endless belt 18 is connected between a pulley 13 provided on the PTO shaft 12 and a pulley 17 at the upper end of the intermediate shaft 16 supported on the upper surface of the cutter housing 3 via a bearing 14.15.
is wound around the endless belt 18, and two idler pulleys 19 and 20 for direction change are in contact with the intermediate portion of the endless belt 18.

An electromagnetic clutch 21 as cutter deck drive stop means is interposed in the center of the intermediate shaft 16, and a pulley 2 provided on the opposite side of the pulley 17 across the electromagnetic clutch 21
2 is connected to a pulley 23 provided at the upper end of the left rotating shaft 5 and a pulley 24 provided at the upper end of the right rotating shaft 8 via an idler pulley 25 by an endless belt 26. Further, a fan 27 is fixed to the middle part of the right rotation shaft 8, and a fan case 28 covering the lower surface is used as a shooter, which will be described later.
A blowout port 29 is formed with a 31-sided opening, and a suction port 30 is formed in the cutter housing 3 facing the upper surface of the fan 27.

The right end of the cutter housing 3 and the grass bag 2 are connected by a shooter 31 disposed along the right side of the vehicle body to convey cut grass. The proar 32 provided at the base end of the shooter 31 is connected to the proar housing 33.
an impeller 35 fixed to the tip of an impeller shaft 34 extending inside the impeller shaft 34; a pulley 36 provided at the base end of the impeller shaft 34; and a pulley 37 provided at the upper end of the right rotating shaft 8.
means that the endless belt 4 is connected via the idler pulleys 3B and 39.
Connected with 0.

The glass bag 2 is fixed to the rear part of the vehicle body and is connected to the shooter.
The hopper top 41 is connected to the end of the hopper top 31, and the glass bag main body 42 is detachably attached to the lower part of the hopper top 41. A compression mechanism 43 that compresses the cut grass inside the grass bag 2 includes a press member 45 fixed to a swing shaft 44 disposed in the left and right directions at the front of the hopper top 41. The part allows the grass supplied from the shooter 31 to fall,
In addition, it is formed in a comb-like shape to efficiently compress the grass that has fallen into the grass bag main body 42.

On the other hand, the base end of the press member 45 is connected to the axle 49 of the front wheel Wf via a Bowden wire 48 consisting of an outer tube 46 and an inner cable 47.

That is, the axle 49 of the front wheel Wf is provided with an eccentric cam mechanism 52 consisting of an eccentric cam 50 and a ring-shaped cam follower 51 that engages with the outer periphery of the eccentric cam 50. A drive member 53 connected to the cam follower 51 controls the rotation of the axle 49. It reciprocates in the vertical direction. The driving member 53 is compressed 4! ! As a means of stopping the structural drive! It is connected to one end of the inner cable 47 of the Bowden wire 48 via a magnetic latch 54, and the other end of the inner cable 47 is connected to the press member 45 via a drive spring 55 having a large spring constant.

A return spring 57 with a small spring constant is provided between the bracket 56 provided on the hopper top 41 and the press member 45.
is provided to oppose the drive spring 55. In the middle of the Bowden wire 48, there is a fullness detection means 58 made of a strain gauge that detects the tension of the inner cable 47, and a hydraulic clutch 59 that manually interrupts the transmission of driving force from the axle 49 to the compression mechanism 43.
is interposed.

As shown in FIG. 4, the 1!1 magnetic clutch 21, which controls the drive of the cantilever deck l, and the compression mechanism 43 are controlled! The magnetic latch 54 is connected to a DC power supply 61 via a relay 60. The self-holding relay 62 connected to the relay 60 is connected to a normally closed switch 63 that is activated by the full detection means 58 that detects the load on the compression mechanism 43.

Next, the operation of the embodiment of the present invention having the above-described configuration will be explained.

To mow the lawn while the lawnmower is running, first engage the manually operated hydraulic clutch 11, and the rotation of the PTO shaft 12 is controlled by the intermediate shaft 16 of the cutter deck 1 via the endless belt 18.
to communicate. At this time, since the electromagnetic clutch 21 provided on the intermediate shaft 16 is in the engaged state, the rotation of the intermediate shaft 16 is transmitted to the left and right rotating shafts 5.8 via the endless belt 26, and the left and right cutter blades 9. 10 is driven to rotate. The grass mowed by the dual-power vine blade 9.10 is sucked in from the suction port 30 by the fan 27 provided on one of the rotary shafts 8, and the air is blown out from the air outlet 29 toward the base of the shooter 31. transported. The grass that has reached the base of the shooter 31 is conveyed toward the grass bag 2 by wind generated by an impeller 35 of a blower 32 connected to the rotating shaft 8 via an endless belt 40.

The grass supplied to the inside of the grass bag 2 gradually accumulates from the bottom surface of the grass bag main body 42, and eventually its upper end approaches the press member 45 of the compression mechanism 43. At this time, the output of the rotation of the axle 49 of the front wheel Wf converted into reciprocating motion by the eccentric cam mechanism 52 is transmitted to the Bowden wire 48 via the hydraulic clutch 59 that is manually engaged during lawn mowing work.

When the inner cable 47 in the outer tube 46 of the Bowden wire 4 is pulled toward the eccentric cam mechanism 52, the driving force is transmitted from the inner cable 47 to the press member 45 via the drive spring 55, and the The members 4 and 5 are swung clockwise, that is, in a direction to compress the grass in the grass bag 2. Further, when the inner cable 47 is loosened, the press member 45 swings counterclockwise by the action of the return spring 57 and returns to its original position.

As the press member 45 reciprocates as the axle 49 rotates in this manner, the grass in the grass bag 2 is compressed downward and compacted, and the amount of grass stored can be increased. As the amount of grass stored in the grass bag 2 gradually increases, the load from the grass increases and the movement of the press member 45 is restricted. Loading is prevented.

Now, when the grass in the grass bag 2 is full, the tension applied to the inner cable 47 of the Bowden wire 48 when it is pulled exceeds a preset specified value. Then, the fullness detection means 58 for detecting the tension of the inner cable 47 is activated, and the normally closed switch 63 in FIG. 4 is opened. As a result, the coil of the self-holding relay 62 is demagnetized and the contacts are opened, so the coil of the relay 60 is also demagnetized and the contacts are opened, and the electromagnetic clutch 21 that controls the drive of the cutter deck 1 and the compression mechanism 43 are driven. Both of the electromagnetic clutches 54 to be controlled become non-engaged. As a result, the connection between the intermediate shaft 16 and the rotating shaft 5.8 is released, the rotation of the cutter blade 9.10 is stopped, and the eccentric cam mechanism 52 and the Bowden wire 48 are
The connection is cut off, and the drive of the compression mechanism 43 is stopped. Thus, the inconvenience of continuously supplying cut grass into the filled grass bag 2 is avoided, and furthermore, the compression mechanism 43 is prevented from continuing unnecessary operation.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the embodiments described above, and various small design changes can be made without departing from the scope of the invention described in the claims. Is possible.

For example, the fullness detection means 58 in the embodiment detects the tension of the inner cable 47 of the Bowden wire 48 using a strain gauge. It is also possible to configure it to detect tension. Furthermore, it is also possible to eliminate the hydraulic clutch 11 and substitute the electromagnetic clutch 21 for its function.

Effects of the C0 Invention As described above, according to the first feature of the present invention, when the grass in the grass bag becomes full and the fullness detection means is activated,
Since the cutter deck drive stop means stops the drive of the cutter deck and forcibly stops the supply of grass to the grass bag, it is possible to reliably avoid the inconvenience of continuously supplying grass to a full grass bag. Moreover, it is possible to improve the durability of the cutter deck drive device.

According to the second feature of the present invention, when the drive of the cutter deck is stopped due to the operation of the full detection means and the supply of grass is stopped, the drive of the compression mechanism is also automatically stopped. This prevents unnecessary loads from being applied and improves durability.

Furthermore, according to the third feature of the present invention, the driving force of the compression mechanism is taken out from the axle of the lawn mower to the eccentric cam mechanism, and the driving force is transmitted by the Bowden wire, so that the driving force of the compression mechanism is The structure of the system is simplified and weight can be reduced.

[Brief explanation of the drawing]

Figures 1 to 4 show one embodiment of the present invention.
The figure is a schematic plan view of the lawn mower, and Figure 2 is n-f of Figure 1.
3 is a sectional view taken along the line m--■ in FIG. 1, and FIG. 4 is an electric circuit diagram of the cutter deck drive stop means and the compression mechanism drive stop means. ■...Cutter deck, 2...Glass bag, 21
...magnetic clutch (cutter deck drive stop means),
43... Compression mechanism, 48... Bowden wire, 49
... Axle, 52 ... Eccentric cam mechanism, 54 ... Electromagnetic clutch (compression mechanism drive stop means), 58 ... Full detection means Patent applicant Kendo Ochiai, Patent attorney, Honda Motor Co., Ltd. agent
Niki - Ming 4 - 1 procedural amendment) Heisei. year i2', month 14EI

Claims (1)

[Claims] [1] A cutter deck (1) for mowing the lawn, a grass bag (2) for storing the grass cut by the cutter deck (1), and a grass bag (2) that stores the grass cut by the cutter deck (1). a compression mechanism (43) for compressing the grass; and the grass bag (2).
fullness detection means (58
), characterized in that the lawn mower is equipped with cutter deck drive stop means (21) for stopping the drive of the cutter deck (1) when the fullness detection means (58) detects that the grass is full. lawn mower. [2] Claim [1] characterized by comprising a compression mechanism drive stop means (54) that stops driving the compression mechanism (43) when the fullness detection means (58) detects that the lawn is full. ] Lawn mower described. [3] The compression mechanism (43) includes an eccentric cam mechanism (52) that converts the rotation of the axle (49) into reciprocating motion, and a Bowden wire (4) that transmits the output of the eccentric cam mechanism (52).
Claim [1] characterized in that it is driven by 8).
Lawn mower listed.