JPH0442218Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a guard device for a steering mechanism of a riding work machine.

(Prior Art) Riding working machines such as riding lawn mowers on which a worker rides and mowing the lawn are known.

This type of riding work machine does not run at high speeds like a car, and it is desirable that the steering mechanism for the front wheels be simple because it does not interfere with movement during work even without a precise and complicated suspension shock absorber.

Therefore, a gear mechanism is provided at the end of the steering shaft, and this and one knuckle supporting the wheel support shaft are connected by a ring to steer the knuckle, and therefore the wheels, and one knuckle is connected by a ring to the other knuckle. It would be simple if a mechanism was adopted in which the other knuckle is steered in conjunction with the steering motion of the other nut.

(Technical problem to be solved by the invention) In the above steering mechanism, the steering link is exposed at the bottom of the vehicle body. Obstacles such as stones are likely to be present on the moving surface, and there is a risk that these may hit the link.

The present invention has been made to solve the above-mentioned technical problems, and its purpose is to protect the steering link mechanism from obstacles and to support the work member by using the guard part. An object of the present invention is to provide a steering mechanism guard device for a riding working machine.

(Means for solving the technical problems) The means for solving the above technical problems is to provide two steering wheels on the left and right sides, and to attach the left and right knuckles that support the steering wheels to a frame so that they can be freely steered. A gear mechanism supported by a supported support member and rotated by a steering shaft is connected to the knuckle by a link, and a guard member is provided in front of the link in a moving direction, and the guard member is capable of supporting a work member. I made it so.

(Effect of the above means) According to the above means, since the guard member is provided in front of the steering link, even if an obstacle hits the guard member during work movement, collision with the link is avoided. Moreover, the guard member can support the cutter housing etc. by supporting it on the frame.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the embodiment, a riding lawn mower is shown as an example of a riding work machine.

The frame 2 that runs in the front and back direction of the riding lawn mower 1 is made up of two members 201 and 202 spaced apart on the left and right.The engine 3 is mounted in the middle part of the frame 2, and in the embodiment, a carburetor 301 and an air cleaner are mounted on one side. 302 is provided, an exhaust pipe 303 is led out to the other side, and a muffler 304 is provided. The engine 3 is covered with a middle cover 4, and a seat 5 is placed on the engine 3.
is coming.

Two front wheels 6, 6 forming steering wheels are disposed on the front left and right sides of the frame 2, and two rear wheels 7, 7 are disposed as driving wheels on the rear left and right sides. There is. The output shaft 305 of the engine 3 hangs vertically, and a pulley 8 is fixed to it. On the other hand, a transmission case 9 is interposed between the rear wheels 7 , and an input shaft 901 is inside the transmission case 9. The input pulley 902 is installed vertically and is connected to the above-mentioned pulley 8 by the belt 10 in the middle part thereof, and a bevel gear 903 at the upper end of the shaft 901 is meshed with a bevel gear 904 whose axis direction is perpendicular to each other. The chain sprocket mechanism and gear mechanism drive the rear wheel shaft 701, and the engine power drives the rear wheels 7, 7.

A cutter drive pulley 905 is fixed to the lower end of the input shaft 901 coaxially with the pulley 902. On the other hand, a cutter 11 is provided between the front and rear wheels 6 and 7 under the frame 2, and the cutter 11 is mounted on a horizontal surface. The housing 111 has a blade shape that rotates within the housing 111, and is surrounded and held by a housing 111 that is open downward and on one side. The cutter shaft 112 projects above the housing 111 and is provided with a pulley 113 at the projecting end, and the pulley 113 and the previously described pulley 905 are connected by a belt 12.
1, the cutter 11 is driven and performs the work of mowing the lawn. The cutter housing 11 has a stay 114 upright on the rear part, which is supported on the vehicle body side with links 13, and a stay 115 protruding from the front part, which is supported on the vehicle body side with links 14, and parallel with these links. A link mechanism is configured to move the housing 111 up and down to adjust the mowing height of the lawn. In addition, 11 in the drawing
Reference numerals 6 and 116 indicate guide wheels provided on the left and right sides of the front portion of the housing.

A steering shaft 151 is installed on the front part of the frame 2 via a handle post 152,
A handle 15 is provided at the upper end of the shaft 151, and a front cover 16 is provided around the handle post 152.
covered with.

A cross member 203 is horizontally suspended between the front parts of the frame members 201 and 202, and a bracket 204 is suspended from the center of the cross member 203 in the left and right direction.
04, a front wheel support member 17 having a length in the left-right direction
The member 17 is pivotally supported by a support shaft 18 at the center thereof, so that the member 17 is supported so as to be able to swing up and down using the support shaft 18 as a fulcrum, and when one of the left and right parts is on top, the other is on the bottom. oscillate. A cylindrical shaft support 171 is provided at both ends of the support member 17 and is inclined downwardly to the outside, and the front wheel support shaft 60 has an L-shape when viewed from the front as shown in FIG.
1, and the front wheel 6 is rotatably supported on the laterally outwardly directed support shaft portion 603 of the support shaft 601 via a bearing 604.

The middle part of the knuckle arm 19 is joined to the lower part of the vertical part 602 of the support shaft 601, and the knuckle arm 1
9 faces forward and backward. By the way, the lower end of the steering shaft 151 mentioned above faces slightly below the frame 2, and the pinion 20 is connected to the lower end.On the other hand, the sector gear 21 faces the front side of this and meshes with the pinion 20, so that the gear Reference numeral 21 supports a base 211 on the vehicle body side. One end of the sector gear 21 and the front part 191 of one of the knuckle arms 19 are connected by a link 22 to a joint 22 such as a ball joint.
1,222. Natsukuru arm 19
The rear part 192 of the rear part 192 and the same part of the knuckle arm on the opposite side (not shown) are connected by a connecting link 23 via a joint 231, whereby the steering input of the handle 15 is transmitted to the sector gear 21 via the shaft 151 and pinion 20, and this is swung left and right about the support shaft 211, and pushes or pulls the link 22, thereby causing the knuckle arm 19 to move around the support shaft 601.
The front wheel 6 swings from side to side about the vertical portion 602 of the front wheel 6 as a fulcrum.
The front wheels of other types are the same amount with the connecting link 23,
This results in in-phase steering.

By the way, in front of the shaft support 171 of the support member 17, there is a rear end portion 24 of both side pieces 241 of the guard member 24.
2, and the side piece 241 extends forward and downward of the member 24, and the guard part 2 connects the front ends of the side piece 241.
43 are provided in the left and right direction. The above-described link 22,
23 is coming. In this way, the links 22 and 23 are protected from the front by the guard member 24.

On the other hand, the front end portions 141 of the left and right front support links 14 of the aforementioned cutter housing 111 are pivotally connected to the outer surface of the side pieces 241 of the guard member 24 via pins 142, and thus the front portions of the housing are connected to the vehicle body side via the links. Therefore, there is no need for a separate support bracket on the vehicle body side for the housing front link.

In the above, the support member 17 is pivoted at the central part.
8, the front wheels 6, 6 move up and down left and right to follow the road surface, while the guard member 24 also follows the road surface, and is supported by the guard member 24 so that the housing 111 also follows.

(Effects of the invention) As is clear from the above, the invention provides the following effects.

A guard member is provided at the lower front of the vehicle and linked,
Since the entire steering device such as the gear mechanism and the steering shaft is surrounded, the steering mechanism can be reliably protected.

By attaching the guard member to the support member of the working machine, there is no need to newly provide a separate support and holding member in front of the vehicle, so the number of parts can be reduced and the attachment and support structure can be simplified.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is an explanatory side view of a lawn mower as an example of a riding working machine, FIG. 2 is a plan view of the same, and FIG. FIG. 4 is a side view, FIG. 4 is a plan view, and FIG. 5 is a front view. In the drawing, 2 is a frame, 6 is a steering wheel, 17 is a support member, 19 is a nut, 20, 21 are gear mechanisms, 22, 23 are links, 24 is a guard member, 1
11 is a working member.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. Two steering wheels are provided on the left and right, the left and right nuts supporting the steering wheels are supported by a support member supported by a frame so as to be freely steerable, and are rotated by a steering shaft. A steering mechanism guard device for a riding working machine, in which a gear mechanism to be driven and a knuckle are connected by a link, a guard member is provided in front of the link in a moving direction, and a working member can be supported by the guard member. 2. The riding work machine is a riding lawn mower, and the utility model registration claim 1 describes that the guard member supports a cutter housing support member that surrounds and supports the cutter and is vertically adjustable. Steering mechanism guard device for riding work equipment.