JP3151373B2 - Moore - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a bevel case having an input shaft mounted on an upper surface of a cutting blade housing via a pair of left and right support stays. A pair of left and right frames attached to the upper surface of the cutting blade housing are rotatably mounted around the vertical axis at the tips of a pair of left and right frames. The front and rear frames for mounting the pair of left and right gauge wheels are mutually reinforced and connected via a horizontal frame. More specifically, the present invention relates to a support structure for the bevel case on the upper surface of the cutting blade housing.

[0002]

2. Description of the Related Art In a conventional mower, a bevel case on the upper surface of a cutting blade housing is attached to the upper surface of a cutting blade housing via a pair of left and right support stays as shown in, for example, Japanese Utility Model Laid-Open No. 15722/1993. .

[0003]

Generally, the mower is driven from the fuselage side via a transmission shaft having a universal joint, and the mowing blade housing is formed of sheet metal. The bevel case is liable to generate vibration and noise due to the drive vibration caused by the vibration and the chatter on the upper surface of the cutting blade housing.

Therefore, as means for suppressing the vibration and noise of the bevel case, for example, a pair of left and right support stays may be attached to the cutting blade housing via vibration isolating rubber. If the anti-vibration rubber is made of a flexible elastic body to improve noise and noise absorption, the bevel case will run out, causing an abnormal load on the transmission system to the mower, and Inconvenience of breakage occurs.

SUMMARY OF THE INVENTION It is an object of the present invention to suppress vibration and noise of a bevel case without damaging a transmission system to a mower.

[0006]

In order to achieve the above object, the present invention is characterized in that a bevel case provided with an input shaft is mounted on the upper surface of a cutting blade housing via a pair of left and right support stays, and a cutting blade housing is provided. A pair of left and right gauge wheels at the front of the blade housing are rotatably mounted on the front ends of a pair of left and right front and rear frames mounted on the upper surface of the cutting blade housing so as to be rotatable around a vertical axis. In a mower in which the front and rear frames are mutually reinforced and connected via a horizontal frame, the bevel case is connected to and supported by the horizontal frame via a pair of left and right reinforcing stays.

[0007]

[Function] In the bevel case, vibration in the front-rear direction is prevented by the horizontal frame, which is a strength member that reinforces and connects the pair of left and right front-rear frames for mounting the gauge wheel to each other. It will be blocked through the stay.

[0008]

As described above, in the bevel case, since the front and side surfaces are fixed, the vibration of the bevel case is suppressed, and the vibration of the bevel case is suppressed. Early breakage of the transmission system can be suppressed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to a front-mounted riding lawn mower. As shown in FIG. 1, the riding lawn mower includes a body frame 3 having front and rear wheels 1 and 2.
A steering unit 6 having a steering handle 4 and a driver's seat 5 is provided at a front portion of the vehicle body, and a driving unit 7 is provided at a rear portion thereof. The mower M is mounted via the link mechanism 9.

The driving unit 7 has a radiator 10 provided with a dustproof net on the front at the rear of the driver's seat 5, an engine 11 at the rear of the radiator 10, and a muffler behind the engine 11. 12 and the engine 1
1 and an air cleaner 13 is arranged at the lower right,
It is covered with a hood 14 having a front opening that is swingable around a horizontal axis X at the rear.

The tip of the intake pipe 13a of the air cleaner 13 is projected outside the bonnet 14 from the shielding plate 15 that closes the gap between the radiator 10 and the bonnet 14, and the pre-cleaner 16 is extended to the tip of the intake pipe 13a. The air cleaner 13 is connected via a pipe 13b to prevent the air cleaner 13 from being clogged at an early stage.

As shown in FIG. 2, the mower M is a three-blade type mower in which three blades b rotating around a vertical axis are provided inside a cutting blade housing m. The cutting blade housing m is mounted laterally, that is, offset to the left, via a transmission shaft (not shown) provided with a universal joint from the fuselage side.
Power is transmitted to an input shaft 17a of a bevel case 17 on the upper surface, a center blade b is driven via an output shaft of a bevel gear mechanism in a bevel case m, and a belt transmission device is transmitted from the center blade. 1
The right and left blades b, b are driven via the first and second blades 9.

The mower M is provided with a cutting lawn discharge port ma on the right side of the cutting blade housing m, and an anti-scaple roller 20 for moving over obstacles and a cutting height are provided at the front of the cutting blade housing m. A pair of left and right gauge wheels 21 and 21 for adjustment
And an anti-scapping roller 22 for moving over an obstacle at the rear.

The pair of left and right gauge wheels 21 and 21 are mounted on the upper surface of the cutting blade housing m via a front bracket 23a and a rear bracket 23b, and the longitudinal axis is formed at the tip of a frame 23 made of a square pipe in the longitudinal direction of the machine body. The pair of front and rear frames 23, 23 for mounting a pair of left and right gauge wheels are reinforced and connected via a reinforcing frame 24 made of a square pipe extending in the lateral direction of the fuselage.
Link brackets 25, 25 for mower suspension are attached to the reinforcing frame 24.

The bevel case 17 has a pair of left and right support stays 26, 26 on the upper surface of a cutting blade housing m made of sheet metal.
And the reinforcing frame 2
4 are connected and supported via a pair of left and right reinforcing stays 27, 27 each having an L-shape in plan view and extending across the back surface of the bevel case 4 and the side surface of the bevel case. The mounting surfaces of the blade housing m with respect to the pair of left and right support stays 26, 26 are welded and fixed to the upper surface of the blade housing m.
28.

[Alternative Embodiment] Although the mower has been described as a front mount type, it may be a mid mount type.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is an overall side view of a riding lawn mower.

FIG. 2 is a plan view of a mower.

FIG. 3 is a longitudinal sectional view showing a support structure of the bevel case.

FIG. 4 is a front view showing a mounting structure of a precleaner.

[Explanation of symbols]

 17 Bevel case 17a Input shaft 21 Gauge wheel 23 Front and rear frame for mounting gauge wheel 24 Horizontal frame 27 Reinforcement stay m Cutting blade housing

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A01D 34/64-34/66

Claims (1)

(57) [Claims] 1. A bevel case (17) having an input shaft (17a) is connected to a pair of left and right support stays (26), (26).
And a pair of left and right gauge wheels (21), (21) at the front of the cutting blade housing (m) are mounted on the upper surface of the cutting blade housing (m). A pair of left and right front and rear frames (23), (2
The front and rear frames (23), (2) for mounting a pair of left and right gauge wheels are mounted on the tip of 3) so as to be rotatable around the vertical axis.
3) The bevel case (17) is attached to the horizontal frame (24) by a pair of left and right reinforcing stays (2).
7) A mower connected and supported via (27).