JPH041765Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to improvements in lawn mowers.

[Conventional technology]

In this type of lawn mower, conventionally, to attach the grass collection container as a work attachment, a gate-shaped pipe frame was used as a bracket to support the grass collection container, and a pair of left and right pipes provided on the rear end surface of the machine frame were used as brackets to support the grass collection container. The structure was such that it was inserted into the type receiver and fixed with a pin to prevent it from coming off (for example, Japanese Utility Model Application No. 60-94037).

[Problems to be solved by the invention] In the case of such a conventional structure, it is necessary to provide an additional pipe-type receiver to the fuselage frame, and the number of parts increases by the pipe-type receiver. Was.

An object of the present invention is to provide a machine that can suppress an increase in the number of parts by making simple improvements to the fuselage frame structure.

[Means for solving problems]

The characteristic configuration of this invention is that a pair of left and right pipe-shaped main frames extend from the engine mounting frame at the front of the fuselage to the rear of the fuselage, and the connecting member for the work attachment is inserted into the rear open end of this main frame. They are configured so that they can be fitted together and fixed together to prevent them from coming off by means of a fixing means, and their effects are as follows.

[Effect]

In other words, the main frame, which is disposed over almost the entire length of the aircraft in the front-back direction, is made up of a pair of left and right pipes, and these pipes extend to the mounting position of the work attachment. The extended end (rear open end) of this pipe main frame can be used as it is as a mounting bracket for a working attachment.

[Effect of idea]

Therefore, the structure is the same as the conventional structure in that the connecting member of the working attachment is inserted into the pipe, but by changing the main frame to a pipe material, the connection between the main frame and the working attachment is The bracket mechanism and the like for the connecting member can be made into one part, and an increase in the number of parts can be suppressed.

〔Example〕

As shown in FIG. 8, the riding lawn mower is equipped with a downward output shaft engine 1 at the front of the machine, a transmission case 2 at the rear of the machine, a driving operation section 3 between them, and front and rear wheels 5, 6. In between, there is a mid-mounted mower 7, and an external grass collection duct 9 that guides the grass clippings from the mower 7 to a grass collection container 8, which is a work attachment connected to the rear end of the machine. .

Next, the frame structure of the traveling aircraft will be explained. As shown in FIGS. 1 and 2, as well as FIGS. 6 and 7, a pair of left and right main frames 11 made of pipes are attached to the rear end of an engine mounting frame 10 constructed by connecting a pair of left and right angle members. 11 extends to the rear of the fuselage, and its extending ends are formed in rear opening ends 11A, 11A in a cut open state. A flat deck 1 made of sheet metal is mounted on the upper surface of the left and right main frames 11, 11.
2 is stretched, and a through hole 1 for the steering operation shaft is provided on the engine frame side of this deck 12.
Steering mechanism support frame 1 with 3 holes
4 are erected. The main frames 11, 11
At the rear of the is a pair of front and rear block-shaped frames 15,
15 is formed upright and constitutes a support frame for the driver's seat 16 together with a fender for the rear wheel 6. On the side of this driver's seat 16 support frame 15,
A locking and fixing frame 18 for a lever 17 for adjusting the cutting height of the mower 7 is provided, and a swing arm 21 operating shaft 19 for linking the operation of the lever 17 with the mower 7 is provided. Further, at the rear ends of the main frames 11, 11, a simple trailer hitch 20 is provided, which is made by welding and assembling plate materials into a channel shape, and from this hitch 20 toward the front side of the fuselage, a transmission case 2 mounting frame 22 is installed. is provided.

Next, the transmission structure in the mower 7 is that the belt 43 is connected to the engine 1 and the input pulley shaft 23 that is
It is configured to be transmitted to a pair of left and right blade shafts 24, 24 via. In the figure, 25 is a tension pulley.

The grass collection duct 9 will be explained. As shown in FIGS. 1 and 2, the grass collection duct 9 is connected to the right rear wheel 6
A front duct 9 is connected to the mower 7 and extends from the mower 7 to the grass collecting container 8 by detouring around the outside side of the mower 7.
A, a rear duct 9C connected to the grass collection container 8, and an intermediate duct 9B made of transparent resin that connects both ducts 9A and 9C. The conveyance state of the cut grass can be checked through this transparent duct 9B. The front end of the rear duct 9C fits the rear end of the intermediate duct 9B so that the rear end of the intermediate duct 9B can be slid relative to each other in the direction of the respective axes, and is flexible enough to allow the mower 7 to move up and down as the mowing height is adjusted. The front end of the intermediate duct 9B fits over the rear end of the front duct 9A, and is fixed to the front duct 9A with a rubber band type fastener 26. Moreover, the front duct 9
A is formed so that its cross section changes from a circle to a square as it approaches the mower 7, and the motor 7 is fitted with a square outlet 27A formed in the exterior case 27 of the mower 7.
connected to. This connection part has the outlet 27
A locking pin 28 that projects outward is fixed to one of the A walls and is configured to be inserted into an insertion hole 29 formed in the side wall of the front duct 9A. On the other hand, at the opposite connecting portion, a connecting part that becomes a round-shaped stopper 30 in the connected state is attached to both the front duct 9A and the mower side outlet 27A, so that the front duct 9A is connected to the outlet 27A externally. The fastener 30 is attached in the fitted state, and the L-shaped pin 4 is inserted from above, thereby completing the connection between the front duct 9A and the mower exterior case 27. As shown in FIG. 5, the procedure for attaching the front duct 9A to the mower exterior case 27 is to first engage the front duct 9A side insertion hole 29 with the locking pin 28, and then This is a method of fastening the stopper 30 with the L-shaped pin 4 by horizontally rotating the pin 28 as a fulcrum.

Next, the mounting structure of the grass collection container 8 will be explained. 1st
As shown in the figures or FIG.
1, it is configured to be detachable by an engaging pin 32 as a fixing means that passes through both, and the left and right sides (described later) A fixed frame 33 for mounting and supporting a pair of grass collection containers 8, 8
are connected and fixed. In this connecting and fixing structure, a pair of left and right pipe engagement parts 33a projecting downward from the fixed frame 33 are fitted into the upper open end 31A of the frame 31. This fixed frame 3
3 is formed into a substantially E-shape in plan view by a U-shaped pipe frame 33A in plan view and a central channel frame 33B, and extends rearward in a cantilevered manner. A cap 8A is provided on the periphery of the upper end opening of the upwardly opening grass collection container 8 with respect to the fixed frame 33.
is pipe frame 33A and channel frame 3
The grass collection container 8 is set so as to be placed in contact with the container 3B over the entire length thereof from above. A plate-like member 3 in which an engagement hole 34a is bored from the cap 8A of this grass collecting container 8.
4 protrudes through the grass collection back part, and the pipe frame 33 of the fixed frame 33
A projecting piece 33b is provided in a protruding manner on the A portion, and when the grass collecting container 8 is placed on the fixed frame 33, the projecting piece 33b passes through the engagement hole 34a, and the position of the grass collecting container 8 is regulated.

Next, the opening/closing covers 35 for the left and right grass collecting containers 8, 8 will be explained. A pair of left and right brackets 3 are provided with horizontal engagement holes 36a in the lower flange portion 35A of the opening/closing cover 35 on the side of the support frame 31.
6 and 36 are fastened and fixed, and a plate piece 37 on which a headed pin 37a is fixed and protruded sideways is provided on the support frame 31, and the pin 37
By fitting and fixing a into the engagement hole 36a, the opening/closing cover 35 can swing up and down around the pin 37a. By placing the opening/closing cover 35 on the fixed frame 33 or the grass collection container 8 fitting and sliding it laterally, the pin 37a is fitted into the engagement hole 36a, and the opening/closing cover 35 is attached. A simple installation method can be used. On the other hand, a hook 38 is provided at the lower end of the opening/closing cover 35 on the side opposite to the side where the bracket 36 is present, and a stopper 39 whose one end is fixed to the channel frame 33B on the fixed frame 33 side is latched to the hook 38. , is configured to maintain the closed position of the open/close cover 35.
The opening/closing cover 35 covers the upper space of the grass collecting containers 8, 8 in a communicating state, and the air exhaust path A communicates from the upper space to the rear space in the internal space.
A net-like body 40 is stretched to form a net-like body 40, and air is exhausted from this net-like body 40 when the grass clippings are full or when a garbage storage bag with poor ventilation is used in the grass collecting container 8.
The opening/closing cover 35 is configured to exhaust air from an opening B at the lower end along the inner surface of the opening/closing cover 35. however,
If the grass storage bag is not used, the air will be exhausted from the grass collection bag.

Next, the attachment structure of the rear duct 9C of the grass collection duct to the opening/closing cover 35 will be described in detail. Fixed frame 3
A plate-shaped pedestal 41 having a recess 41a that opens upward is provided on the pipe frame 33A of No. 3, and a recess 35a that opens downward is provided in a corresponding portion of the pedestal 41 on the side surface of the opening/closing cover 35. The grass collection rear duct 9C is inserted into the opening formed by the recess 41a of the pedestal 41 and the recess 35a of the cover 35 in the closed position, and a pair of right and left A protrusion-type annular engagement portion 42 having an engagement groove 42a formed between the protrusions is provided, and the plate-shaped tip of the pedestal 41 having a pedestal-side recess 41a engages in the engagement groove 42a. However, the rear duct 9C is attached and fixed in a state in which it contacts the inner edges of both the recesses 41a and 35a.

[Another example]

○B The connecting member 31 may be in the shape of a round bar.

○B The work attachment may be something other than a grass collection container.

○C The above embodiment may be applied to a walk-behind lawn mower.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

The drawings show an embodiment of the lawn mower according to the present invention, FIG. 1 is a side view showing a grass collection duct, a grass collection container, and the arrangement of the machine body, and FIG. 2 is a side view showing the grass collection duct, grass collection container,
And, a plan view showing the arrangement of the machine body, Fig. 3 is a longitudinal sectional front view showing the connection part between the grass collection duct and the opening/closing cover/cradle, and Fig. 4 is a perspective view showing the attachment structure of the grass collection container to the machine body. Figure 5 is a plan view showing the posture of the mower and the grass collection container before connection, Figure 6 is a plan view showing the frame structure of the traveling machine, Figure 7 is a rear view showing the frame structure of the traveling machine, Figure 8 is an overall side view. 8... Attachment for work, 10... Engine mounting frame, 11... Main frame, 11A...
...Rear opening end, 31... Connecting member.

Claims (1)

[Scope of utility model registration request] A pair of left and right pipe-shaped main frames 1 extend from the engine mounting frame 10 at the front of the fuselage to the rear of the fuselage.
1, 11 are extended, and the connecting member 31 of the working attachment 8 is inserted and fitted into the rear open ends 11A, 11A of the main frames 11, 11, and both 8, 31 are prevented from coming out by the fixing means. A lawn mower that is configured to be fixed.