JPS61115413A - Riding type lawn mower - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a riding lawn mower for mowing the lawn while riding on the lawn mower.

(Prior Art) Power-driven lawn mowers are in practical use, which perform lawn mowing work by rotating a cutter blade in a horizontal plane using the power of an engine.

If such a power lawnmower is a riding type that is ridden by an operator, a tricycle-type model with one front wheel and two rear wheels has one front wheel located in front of the center between the two rear wheels, and the front wheel touches both surfaces while moving. It is disadvantageous in terms of reaping ability because of the
A four-wheeled type as shown in the figure is in practical use.

This lawn mower (71) has two front wheels (72) and (73).
, two rear wheels (74) and (75), a vehicle body (76) is provided between the front and rear wheels, a passenger riding section (77) is provided in the center of the vehicle body (76), and a vehicle body (76) is provided between the front and rear wheels. Under the car body (7B) is a cutter housing (with a cutter inside).
On the other hand, a grass bag (79) for storing cut grass is placed behind the rear wheels (74) and (75), and a grass bag (79) is placed between the housing (78) and the grass bag (79).
Connect with the duct (80), guide and discharge the grass cut with the cutter to the negative side of the housing (7th), and connect it with the duct (80).
0) and stored in a glass bag (78).

(Problems to be Solved by the Invention) In the conventional riding lawn mower described above, the glass bar (79) must be placed at the rear because the operator rides on the vehicle body (76). Cutter housing (78), riding part (7
7), the length L) in this direction is larger by the length of the glass bag (73) than the longitudinal dimension of the vehicle body (76) equipped with the cutter housing (78) and the glass bag (page 79). The duct (80) cannot be led out rearward through the center of the vehicle body (76) because the boarding section (77) is located in the middle of the vehicle body (76).
) from the - side of the vehicle body and has to extend rearward, so that the duct (80) protrudes sideways by (III). As a result, the cutter housing (7
8) Even if the functional devices such as the grass bag (79) and the duct (80) are kept within the required dimensions, the lawnmower will become larger in both front and rear dimensions and width, and the lawn mower will become larger, and there are Since the duct and glass bag protrude significantly from the front, improvements are also desired in terms of driving and operability.

On the other hand, in the case of a three-wheeled type, there is the disadvantage that the front wheels are located at the center in the width direction, as described above, and may run over the lid surface. Since the vehicle must be operated from the passenger compartment, the glass bag must protrude backwards and the duct must protrude to one side as before, and the above-mentioned problems cannot be solved.

The present invention has been made to solve the above technical problems.

(Objective of the Invention) The object of the present invention is to allow a worker to board the vehicle without getting in the way of installing the duct and grass bag for the crew member, and to use a cutter, duct, and grass bag of the same capacity as before. Significantly more compact exterior design with excellent driving operability.
To provide a riding lawn mower with a small turning radius and excellent workability.

(Means for Solving the Problems) In order to solve the above-mentioned technical problems, the present invention includes front and rear wheels along the vehicle axis, the front wheels are steering wheels, and at least the rear wheels are drive wheels, and the engine and the It is equipped with a power transmission device attached to the engine, a passenger seat between the front and rear wheels, a single side wheel located between the front and rear wheels and spaced laterally, and a connection between the front and rear wheels and the side wheel. A cutter driven by engine output and a cutter housing for housing the cutter are provided in the space between the cutters, and a grass bag is provided at the rear of the cutter housing. It can now be connected to a glass bag.

(Operation by the above means) According to the above means, in a riding lawn mower, the operator rides between the front and rear wheels, and uses the space between the wheels and a side wheel spaced apart to one side to operate the cutter. A cutter housing for storing the cutter is installed, and the rear part is open because the occupant is on the side.A glass bag is installed in this part and the cutter housing and the bag are connected, so the glass bag is placed in the longitudinal direction of the vehicle body. The duct can be placed between the front and rear wheels and the side wheels. Therefore, all the necessary equipment can be accommodated within the dimensions of the vehicle body, and the exterior size can be made more compact.

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

1 to 3 show an example of a lawn mower according to the present invention.

FIG. 2 is an overall perspective view with the cover, glass bag, and duct removed, and FIG. 3 is a plan view for explaining the steering and power transmission system.

The frame (1) has a structure similar to that of a motorcycle.

Two upper members (Ib) are extended rearward from the top of the head tube (1a), and members (lb),
Sub-members (Ic) and (lc) are suspended downward from each intermediate part of (lb) in a V-shape when viewed from the side, and are connected to the rear fork (
1d) is pivotally installed to support the rear wheel (2), and a cushion unit (3) is interposed between the rear fork (Id) and the rear portions of the seven support members (Ib) and (lb).

An end of a lower cross member (le) extending laterally is connected and supported at the lower part of the head tube (la), and the end of the lower cross member (le) is connected to the lower end of the lower cross member (1e) so as to be located rearward and closer to the rear wheel (2). A lower side member (IF) is extended, and the rear end portion of the side member (1f) is bent toward the rear wheel (2) to form a support portion (Ig). In the example, the upper part of the helad tube (la) and the lower gross member (1
There is a sub-member (l) in the shape of a stringer between the opposite end of
h) is installed, and the upper member (tb) is installed.

At the rear of the vehicle (1b), a fuel tank (4) is disposed above the rear wheel (2), and in front of this, a seat (5) for a passenger to ride on is disposed as shown in the first figure.

The front wheel (8) is arranged in front of the Herad tube (la) so as to have the same longitudinal axis as the rear wheel in the embodiment, and the front wheel (6) extends forward from the middle part of the lower cross member (le). Its - side is supported by a leading arm (7) consisting of two extended arms (7a) and (7b),
The leading arm (7) is pivotally connected to the cross member (1e) via the bracket (?e) on the base (7d) so that the arms (7a) and (7b) maintain a parallel relationship, and the upper arm (7a) A cushion unit (8) is interposed between the intermediate part and the upper part of the sub-member (lh), and the front part (7C) of the lidding arm (7) is bent outward;
The bent end supports the front wheel.

One side wheel (9) is attached to the end of the lower cross member (le) of the frame (1) opposite to the helad tube (la).
, the side wheels (θ) are road wheels, and an empty space is formed in the front and rear direction between the side wheels (9) and the front and rear wheels CB) and (2). If this is the standard, the passenger will sit astride between the front and rear wheels (6) and (2) on one side without facing the space.

Incidentally, in the embodiment, the front and rear wheels (8) and (2) are arranged on the same line in the front and rear direction, but even if the front wheel (6) is slightly offset inward from the rear wheel (2) as shown in Fig. 4, Preferably, the offset amount (a) is arbitrary. Also, the front wheel (6) of the side wheel (9)
) The offset amount (b) is also arbitrary.

Upper member (lb) behind the head tube (la).

(lb) An engine (10) is mounted on the front part, and an air cleaner (11) is arranged on the engine (lO) in the embodiment, and the air cleaner (11) is connected to the members (lb), (lb).
A transmission case (12) whose upper half protrudes above the front part and faces into the space from the inside of the crankcase (job) under the cylinder unit (10a) of the engine (10), that is, toward the side wheels (9). will be placed. and the engine (l
The exhaust pipe (13) is bent rearward from the front of the muffler (13) and passed through the outside to face between the rear wheel and the engine.
4), and in the present invention, the engine (10) is disposed between the front and rear wheels at the front behind the herad tube (la) of the frame (1), similar to a motorcycle, and the transmission case ( 12) is placed on the side, making it easier to install auxiliary equipment, and the muffler (14) does not need to be placed on the side.Furthermore, the transmission case (12) is placed on the side of the engine, making it easier to install auxiliary equipment. This is advantageous because the height of the lawn mower is reduced, the ground clearance is high, and the cutter and cutter housing can be installed underneath when mowing the lawn.

The front and rear wheels (8) and (2) are driven as follows.

The first output shaft (12b) protruding from the rear part (12a) of the engine (10) side of the mission case (12) is connected to the propulsion shaft (15) via the universal joint (15a). The gear box (16) extends rearward and is installed inside the rear wheel (2) via a universal joint (15b).
The rear wheel (2) is driven by a shaft drive mechanism.

A second output shaft protrudes forward from the middle part in the width direction at the front part of the mission case (12), and is connected to the propulsion shaft (17) via the universal joint (17a), and the propulsion shaft (17) is connected to the front wheel ( 6), extending diagonally forward to face the propulsion shaft (
17) is connected to a gear box (18) provided on this side of the front wheel (6) via a universal joint (17b), and the gear box (18) rotates as the front wheel (6) moves laterally as described later. It is configured so that it can be swung by a knuckle arm.

A gear box (19) is provided on the side (12e) of the mission case (12) opposite to the engine (lO),
In the embodiment, the first and second output shafts (for work) are installed before and after this.
20) and (21) are protruded, and in the example, the rear output shaft (
21) is extended rearward, and the frame support part (Ig
) through the shaft support (21a) provided at the rear end output section (2
1b) to protrude.

Next, to explain the steering mechanism, the steering shaft (22a) is rotatably inserted into the head tube (la),
A shaft (22a) protruding onto the head tube (Ia)
) Attach a bar-type handle (22) to the upper end.

Steering shirt) (22a) A pitman arm (23) is connected to the lower end, and the arm (23) is connected to the front wheel relay rod (20) via a universal joint (23a), while the upper cross member (1e) A V-shaped link (25) in plan view is installed (25b) l, one end of this (25a
) is connected to the takeaway rod (24) via a universal joint (24a). The other end (25c) of the link (25) is connected to the tie rod (2B) via the universal joint (28a),
Connect the tie rod (26) to the front wheel (6) and gear box (1).
A universal joint (2) is attached to the knuckle arm (27) that supports the
13b).

The side wheel (9) has a swing arm (
28), and the arm (28) has a base (28a) pivotally supported on the front outer surface of the side member (lf), and the arm (28) is shown in FIG. 3 in a plan view. The knuckle arm (29) is pivotally supported on the bent outer end, and the side wheel (9) is supported by the knuckle arm (28).
), the knuckle arm (29) is connected to one end of the side wheel tie rod (30) via a universal joint (3Oa), and the other end of the tie rod (30) is connected to the aforementioned pitman arm (23). is connected to the universal joint (23a). A cushion unit (31) is interposed between the arm (2) and the side member (tr).

The above examples include front and rear wheels (8), (2) and side wheels (9).
were suspended and supported by cushion units, but when the wheels are constructed with ultra-low pressure tires with high driving force, so-called balloon tires, they have their own cushioning properties, so there is no need to suspend them with cushion units, and rigidity is attached to the vehicle body. Alternatively, only the side wheels may be rigidly supported.Also, in the embodiment, the side wheels (9) are steered in conjunction with the front wheels (6), but the side wheels It may be parallel to the rear wheel (2) and fixed in the same way.

The cutter housing (32
), the housing (32) has an oval shape with straight intermediate both sides in plan view, and the housing (32) has one side (3
2!1) faces in front of the side wheels (9), and the other side (32b) faces between the front and rear wheels (6) and (2), is arranged diagonally in plan view, and is supported by the frame (1). ing. housing(
32) has a top piece (32c) and a circumferential piece (32d) and is opened downward, and left and right cutter blades (33) and (34) that rotate in a horizontal plane are housed on the left and right sides of the interior. (33) and (34) are arranged with different phases. Cutter blade (33), (3
The shafts (33a) and (34a) of the housing (3)
2), and the pulleys (35) and (313) are tied to the extending part of the shaft.
5) and (36), one is at a high position and the other is at a low position by the width of the belt. The upper end of the shaft (33a) is supported by a bracket (li) provided on the cross member (1e) of the frame, and the other shaft (34a) is similarly supported although not shown in the figure.

Gear box (37) in the middle of the cross member (le)
The above-mentioned front output shaft (20) is passed through this to drive the worm (38) in the box, and the output shaft (20)
The worm (4) of the drive shaft (39) vertically installed perpendicular to the
0) and the worm (38), and the shaft (33) is connected from the box (37) to the cross member (1e) of the frame.
A two-stage pulley (41) is fixed to the hanging end of the shaft (38). Belts (42) and (43) are wound between the grooves of the same diameter on the upper and lower sides of the pulley (41) and the aforementioned pulleys (35) and (3B), and the pulley ( 41) and belts (42) and (43).
) and pulleys (35) and (3B) to rotate the cutter blades (33) and (34) arranged in parallel to perform lawn mowing work. In the drawing, (44) is the negative side front of the housing (32) This is a guide wheel set up so that it looks like a mountain.

A grass bar (45) for storing cut grass is provided behind the cutter housing (32). The glass bag (45) is provided on the side of the rear wheel (2) on the side wheel (8) side, and has a horizontally long rectangular shape in plan view, with the - side (45a) located inside the rear wheel (2) on the other side. (45b) is located behind the side wheel (9) and is located on the same side as the outer surface of this or slightly inside.
c) is approximately on the same plane as the rear wheel (2). Glass bag (4
5) consists of upper and lower halves (4B) and (47), the front surface (47a) of the outer part of the lower half (47) is tilted backward and downward, and the corresponding part of the upper half (4B) is the side wheel (8). ) is configured so that it does not interfere with the side wheels even though it invades the side wheels. Glass bag (
45) is supported at the rear part of the frame, and the rear end of a duct (48) is connected to the front of the middle part (48a) of the upper half body (46), and the duct (48) is tilted forward and downward so that its tip end It is communicatively connected to the middle part of the cutter housing (32) described above.

The frame (1) described above is covered with a cover (49), and the cover (43) has a front fender (49a) at the front so as to cover the front wheel (6), and a cutter housing (32) which protrudes laterally. ) as if covering the top of Derontka/to a part (
49b) from its outer end to the side wheel (9) and duct (48
) includes a part of the side cover (49c) etc. extending between
A headlight (50) is provided at the front of the handle (32).

In the above, the front and rear wheels (8) and (2) are driven to move, the side wheel (3) is transferred, and the cutter blade (
33) and (34) rotate and move while mowing the lawn. The cut grass is sent to the rear grass bag (45) via the duct (48) and stored in the bag (45).

The embodiment has been described in detail above, and although the embodiment is configured to drive the front and rear wheels, it is also possible to drive only the rear wheel (2), and the cutter is of a type that uses two blades. It may also be in sheet format.

(Effects of the Invention) As is clear from the above, according to the present invention, the operator can ride between the front and rear wheels, and the cutter and cutter housing can be disposed in the space between the wheels and the side wheels. The rear part is open because the operator is on the side, and a grass bag can be placed in this area, and the duct connecting the cutter housing and the glass bag can be placed approximately in the center of the vehicle width. . Therefore, as shown in Fig. 5, the glass bag fits within the longitudinal length of the car body, and the glass bag does not protrude to the rear of the car body as in the conventional case shown in Fig. 6, and the duct does not protrude to one side. Instead, it uses the same capacity cutter, grasper 2, and duct as before, but all of them fit within the longitudinal and lateral dimensions of the vehicle body, making the exterior significantly more compact, making it possible to downsize while maintaining functionality.

In addition, if the side wheels are configured to be steerable in conjunction with the front wheels, the turning radius becomes smaller and steering operations become easier, improving lawn mowing work efficiency, providing superior functionality in practical terms, and making driving easier. A riding lawn mower that is easy to operate can be obtained.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is an overall perspective view, Fig. 2 is an overall perspective view with the glass bag and duct removed, and Fig. 3 shows the steering and power transmission system. FIG. 4 is a plan view for explaining the relationship between the three wheels, FIG. 5 is an explanatory plan view, and FIG. 6 is a plan view of the conventional example. In the drawing, (2) is the rear wheel, (8) is the front wheel, (3) is the side wheel,
(10) is the engine, (12) is the power transmission device, (32)
) is a cutter housing, (33) and (34) are cutters, (45) is a glass bag, and (48) is a discharge duct.

Claims (1)

[Scope of Claims] 1. The vehicle has front and rear wheels along the axis of the vehicle body, the front wheels are steering wheels and at least the rear wheels are driving wheels, an engine and a power transmission device attached to the engine are provided, and a vehicle is provided between the front and rear wheels. A cutter driven by the engine output is installed in the space between the front and rear wheels, and a cutter is installed in the space between the front and rear wheels and the side wheel. The cutter housing has a cutter housing for storing the grass, and a grass bag is provided at the rear of the cutter housing, and a cut grass discharge duct extending behind the middle part of the cutter housing is connected to the grass bag immediately following the cutter housing. A riding lawn mower. 2. The riding lawn mower according to claim 1, wherein the engine is disposed between the front and rear wheels. 3. The riding lawn mower according to claim 1, wherein the front wheels and the rear wheels are driving wheels. 4. The riding lawn mower according to claim 1, wherein the side wheels can be steered in conjunction with the front wheels.