JPH0343014A - Self-propelled lawn mower - Google Patents

Abstract

PURPOSE:To facilitate the attachment of a driving part to a mowing part and to enable easy control of the cutter height of the mower part by attaching a driving frame of a driving part to a mower case with bolts and nuts arranged in vertical direction. CONSTITUTION:A height-controlling bolt 13 is fixed vertically downward to a driving frame. A height-controlling bracket 15 having fixed insertion tube is fixed to each supporting bracket 4 with a bolt. The bolt 13 is inserted into the insertion tube of the bracket 15 and a pair of nuts 16 engaged with the bolts 13 are positioned at the top and bottom of the insertion tube. The height of a mower case can be adjusted by moving the nut 16 in the longitudinal direction of the bolt 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) This defense relates to a self-propelled lawn mower that can be self-propelled by a remote controller or the like, and particularly relates to the frame structure of its traveling section.

(Prior art) Conventional lawn mowers have an engine mounted on the mower case, and this engine rotates the cutter inside the mower case.
The mainstream mowers are mowers that are moved by pushing a mower case manually to cut the lawn.

(Problems to be Solved by the Invention) However, with such conventional lawn mowers, a large amount of human power is required when mowing grass grown on a vast area such as a golf course. In addition, lawn mowing work under the scorching summer sun is
As the name of the work suggests, it is heavy labor.

This invention was made in consideration of the above-mentioned circumstances, and not only allows the lawn mower to run on its own, but also
The running part can be easily attached to the mowing part, and only b
To provide a self-propelled lawn mower which can easily adjust the cutter height of a lawn mowing part.

[Structure of defense]

(Method E for Solving the Problem) This invention comprises a lawn mowing section in which an engine is mounted on a seven case to the right of an internal cutter, and a running section attached to this lawn mowing section and equipped with drive wheels. In the self-propelled lawn mower, the traveling frame of the traveling section is attached to the mower case by connecting bolts and nuts arranged in the vertical direction.

(Function) Therefore, according to the self-propelled lawn mower according to the present invention,
Since the lawn mower has a running section with drive wheels, the lawn mower can be driven by itself by operating this running section using a remote control or the like.

In addition, since the running frame is attached to the mower case via bolts and nuts, the running part can be easily attached to the mower case, and since the bolts are arranged vertically, the mower case can be easily attached to the running part. The height can also be easily changed, and as a result, the height of the cutter inside the mower case can be easily adjusted.

(Actual tsr*> Embodiments of the present invention will be described below based on the drawings.

FIG. 2 is a plan view showing an embodiment of the self-propelled lawn mower according to the present invention, FIG. 1 is a cross-sectional view taken along the line ■-■ in FIG. 2, and FIG. 3 is a view in the direction of the ■ arrow in FIG. It is.

As shown in FIGS. 1 and 2, an engine 2 is mounted on a mower case 1, and a cutter 3 for cutting grass is disposed inside the mower case 1. The cutter 3 is rotatably connected to a crankshaft (not shown) of the engine 2.

After ttJ of the mower case 1, a pair of support brackets 4 and 5 are fixed integrally or integrally, respectively. A wheel arm 6 is rotatably supported on the rear support bracket 5, and a wheel 7 is rotatably supported at the tip of the wheel arm 6.

The wheel arm 6 is provided so as to be able to engage with any one of the plurality of locking portions 8 protruding from the support bracket 5 . Selection of these engaging portions 8 and height adjustment bolts 13 described later
The height of the mower case 1 is adjusted by the coupling of the nut 16.

The mower case 1, engine 2, cutter 3, rear wheel 7, etc. constitute a lawn mowing section 9. This lawn mowing i'ls
A front wheel 10 as a drive vehicle wheel is attached to the support bracket 4 of 9.
The running frame 12 of the running section 11 is detachably attached.

The mounting structure of this traveling frame 12 to the support bracket 4 will be explained with reference to FIGS. 4 and 5. A height II bolt 13 is fixed to the traveling frame 12 in a vertically downward direction. On the other hand, a height adjustment bracket 1-15 to which an insertion tube 14 is fixed is bolted to each support bracket 4. The height adjustment bolt 13 is inserted into the insertion fm14 of the height adjustment bracket 15, and two nuts 16 screwed to the height adjustment bolt 13 are respectively arranged at the upper and lower ends of the insertion tube 14, The load of the running frame 12 is supported by these nuts J3 and the insertion tube 14'.

By rotating these nuts 16 and moving the nuts 16 in the longitudinal direction of the height adjusting pole 1-13, the wheel arm 6 and the locking portion 8 are selectively engaged, and the mower case 1 is selectively engaged. Constructed to be easily adjustable in height.

The height of the mower case 1 shown in FIG. 1 indicates the highest position, and the position indicated by the two-dot chain line 17 in FIG. 1 indicates the lowest position of the mower case 1.

The mower case 1 has 14 sections in height between these uppermost and lowermost positions.

Now, as shown in FIG. 2, the running frame 12 has a substantially U-shaped planar shape, and is expanded in the width direction of the running section 11.
In this direction, it is configured to surround the front wheel 10, a driving drive motor 20, a steering plate 38, a steering motor 42, a tie rod 48, etc., which will be described later. Roughly speaking, the traveling frame 12 is molded with its front portion raised as shown in FIG. A floor brake t~18 is provided on the lower side of the front part of this traveling frame 12.
is fixed. This floor play 1-18 runs through one steering knuckle at both ends of the road (j-
920 and the aforementioned front wheel 10 are provided.

The traveling drive motor 20 is a reversible motor, and the driving force from this traveling drive motor 20 is transmitted to a worm gear and a worm wheel (both not shown) in the gear case 21.
etc., and is transmitted to the dry air 1 fufu 1-22 shown in FIG. Furthermore, this driving force is applied to the drive shaft 22
The signal is then transmitted to the wheel 24 of the front wheel 10 via the freewheel hub mechanism 23.

Here, the freewheel hub mechanism 23 will be explained. A wheel boss 25 is rotatably disposed on the drive shirts 1 to 22 by a bearing 26.

The drive shaft 22 is also rotatably supported by a bearing 26A with respect to the steering knuckle 19. A wheel 24 on which a tire 27 is mounted is fixed to the wheel boss 25 with a bolt.

The inner circumference of this wheel boss 25 and the drive shaft 2
Splines 28 and 29 are respectively carved at the tip of the drive shaft 22, and the spline 29 of the drive shaft 22 is
The engagement/disengagement hub 30 is spline-coupled to. A spline 31 that can engage with the spline 28 of the wheel boss 25 is carved on the outer periphery of the engagement/disengagement hub 30 . Engagement/disengagement hub 30
In the autumn state shown in FIG. 6, in which the spline 31 of the engagement and disengagement hub 30 moves around the drive shaft 22 and comes into contact with the collar 32, the spline 31 of the engagement/disengagement hub 30 is configured not to engage with the spline 28 of the wheel boss 25.

Therefore, by moving the engagement/disengagement hub 30 so that the spline 31 of this engagement IlQ hub 30 engages with the wheel boss 250) spline 28, the driving force from the drive shaft 22 is transferred to the wheel 24 via the engagement/disengagement hub 30. is transmitted, and the front wheel 10 rotates.

Furthermore, by disengaging the splines 31 of the engagement/disengagement hub 30 and the splines 28 of the wheel boss 25, the front wheel 10 is provided to be able to rotate around the drive shaft 22 without any load.

On the other hand, the steering knuckle 19 is configured to be horizontally rotatable around the steering wheels 71 to 33. In other words, the steering shaft 33 (and the floor plate 18
The steering knuckle 19 is rotatably supported in the horizontal direction via a bearing 34.

A nut 35 is screwed onto the tip of the steering shaft 33 via a washer t35A, and the nut 35 places the bearing 34 in a fixed position, and also prevents the steering knuckle 19 from being pulled out.

Now, as shown in Figures 1 to 3, the floor plate 1
Reinforcement plays 1 to 36 are fixed at the center position in the width direction of the running portion 11 of No. 8. A steering boss 37 shown in FIG.
FIN, and a pivot shaft 39 fixed to the steering plate 38 is rotatably pushed through the steering boss 37. A ring 40 is fitted to the tip of the pivot shaft 39, and the pivot The shaft is repaired.

A second gear 41 is carved on the rear side of the steering plate 38 as shown in FIG.
1, the motor gear 43 of the steering motor 42 is engaged.

The steering boss 42 is attached to the floor plate 18 and the reinforcing plate 36 via a motor mounting plate 44 and a rotating rod 45 shown in FIG. That is, the rotation boss 46 is welded to the floor plate 18 and the reinforcing plate 36, and the rotation rod 45 is TI-fitted into the rotation boss 46. A motor mounting plate 44 is fixed to the rotating rod 45, and a steering motor 42 is mounted to this motor mounting plate 44.

Furthermore, a ring 4 for preventing removal is provided at the tip of the rotating rod 45.
7 is fitted. Therefore, morphing (1 plate 4
4, by rotating it in the horizontal direction +Q+ (in the direction of the arrow) around the rotation boss 46 around the rotation rod 45,
The motor gear 43 and the sect gear 41 are engaged or disengaged from each other.

As shown in FIGS. 2 and 3, ties 48 are pivotally supported at both front and rear ends of the steering plate 38, respectively. The other ends of these tie rods 48 are pivotally supported by the upper part of the steering knuckle 19 and the rearward neck of the steering shaft 33.

Therefore, when the motor gear 43 rotates in the direction of arrow A due to the operation of the steering motor 42, the sect gear 4
1, the steering plate 38 rotates about the pivot shaft 39 in the direction of arrow B. Then, the steering knuckle 19 rotates around the steering shaft 33 in the direction of arrow C via the tie rod 48. When the steering motor 42 rotates in the opposite direction, the steering knuckle 19 rotates in the opposite direction. In this way, the operation of the steering motor 42 causes the front wheels 10 to
is steered.

Incidentally, a battery 49 that supplies power to the steering motor 42, the traveling drive motor 20, etc. is arranged at the rear of the traveling frame 12.

Its structure will be explained with reference to FIGS. 1 and 2.

At least two parallel bridges 50 extending in the width direction of the running section 11 are manually welded to the rear part of the running frame 12. A battery case 51 is fixed on this bridge 50 in parallel with the bridge 50, and four batteries are mounted on this battery case 51. As shown in FIG. 1, the longitudinal center line 52 of the vehicle (self-propelled lawn mower) consisting of the running section 11 and the mowing section 9 is such that the distance from this center line 52 to the centers of the front wheels 10 and the rear wheels 7 is The battery 49 is set at a position where the center line 5 is constant.
It is placed at a distance #im from 2.

Further, the center of gravity 1 of the engine 2 is located at a distance n from the center line 52. And these distances iI! I1
m and n are set to be approximately equal.

Further, a controller 53 is installed on the floor plate 18 of the running section 11. This controller 53 includes a receiver that receives a signal from a transmitter (not shown) carried by an operator (not shown), and a rotational direction of the travel drive motor 20 and the steering motor 42 based on the signal from this receiver. The motor is configured to include a motor that controls the amount of rotation.

The self-propelled lawn mower of this embodiment is configured as described above,
In particular, a running section 11 is provided in front of the mowing section 9, and this running section 1
1 is provided with a front wheel 10 that is rotatably driven by a driving drive motor 20, and this driving drive motor 20 is controlled by a transmitter carried by an operator via a controller 53. The lawn mowing section 9 can be driven by itself by remote control using the running section 11.

In addition, since the front wheel No. 10 is connected to the driving drive motor 20 through the gear case 21 having a worm gear and a worm wheel, the deceleration rate is high when the driving drive motor 20 stops operating, and the operator can move the lawn mowing by himself. The front wheel 10 cannot be rotated by pushing the machine. However, since the freewheel hub mechanism 23 shown in FIG. By releasing the spline connection between the wheel boss 25 and the spline 28, 1. The front wheel 10 can be rotated with zero load. Thereby, even when the drive motor 20 for driving is stopped, the self-propelled lawn mower can be pushed and pulled to rotate the front wheels 10 and move the self-propelled lawn mower to a desired position.

Furthermore, as shown in FIGS. 1, 4, and 5, height adjustment bolts 13 are fixed to the traveling frame 12 of the traveling section 11, while height adjustment bolts 13 are fixed to the support bracket l-4 of the mowing section 9. : The bracket 15 for Al11 is fixed, the height adjustment pole +-13s is inserted into this height adjustment bracket 15, and these height adjustment bolts 13 and height adjustment bracket 15 are fixed with nuts 16. Therefore, the traveling section 11 can be easily attached to the lawn mower PI 19.

7J1 also has a height adjustment pole! ~13 is running frame 1
By rotating the nut 16, the relative position of the height adjustment bracket I.15 and the height adjustment bolt 13 can be changed. Easy! 11, and as a result, the height of the cutter inside the mower case 1 can be easily changed.

Further, the traveling frame 12 is expanded in the width direction of the traveling section 11 and is configured to surround the main parts of the traveling section 11 (front wheels 10, traveling drive motor 20, steering plate 38, steering motor 42, and tie rods 48). Therefore, while the self-propelled lawn mower is running, the main parts are protected by the frame 12.
Damage to this main component can be prevented.

In the above embodiment, the height adjustment bolt 13 is attached to the running frame 12, and the height adjustment bracket 15 is attached to the support brackets 1 to 4. However, the height adjustment bolt 13 is attached to the support bracket 4. 13, and the height adjustment bracket 15 may be fixed to the traveling frame 12.

〔Effect of the invention〕

As described above, the self-propelled lawn mower according to the present invention includes a mowing section in which an engine is mounted on a mower case having a cutter inside, and a running section attached to the mower and provided with drive wheels. However, the running frame of the above running section is
The mower case can be attached to the mower case by connecting vertically arranged bolts and nuts, so that the lawn mower can run on its own and the running part can be easily attached to the mowing part. The cutter height of the lawn mower can be easily adjusted.

[Brief explanation of drawings]

FIG. 1 is a sectional view taken along line I-I in FIG. 2, FIG. 2 is a plan view showing an embodiment of the self-propelled lawn mower according to the present invention, and FIG. 3 is a view in the direction of the ■ arrow in FIG. 1. , Fig. 4 [IV- of Fig. 1]
5 is an assembled perspective view of the height adjustment bracket, height adjustment bolt, etc., and FIG. 6 is a sectional view taken along the line Vl--Vl in FIG. 1. DESCRIPTION OF SYMBOLS 1...Mower case, 2...Engine, 3...Cutter, 4...Support bracket, 7...Rear wheel, 9...
Lawn mowing section, 10... Front wheel, 11... Traveling section, 12...
・Traveling frame, 13... To height adjustment pole 1, 15
...Height adjustment bracket, 16...Nut, 20
...Travel drive motor.

Claims (1)

[Claims] In a self-propelled lawn mower, which has a lawn mowing section in which an engine is mounted on a mower case having a cutter inside, and a running section attached to the lawn mowing section and equipped with drive wheels, the running frame of the running section is arranged in a vertical direction. A self-propelled lawn mower, characterized in that it is attached to the mower case by connecting bolts and nuts arranged at the mower case.