JPH0795807A - Mower - Google Patents

Abstract

PURPOSE:To provide a mower which can inhibit the shaft of mowing blades from being inclined by suppressing the sound of vibration. CONSTITUTION:A supporting boss 9 is set through a rubber vibration insulator 16 to the cutting blade case 5 and the upright shaft of the cutting blade 8 is set to inner side of the supporting boss 9. The transmission pulley 11 is mounted on the top of the shaft 8 and the transmission cover 12 overlaying the pulley 11 is set to the blade case 5 and rubber vibration insulators 13, 15 are placed between the extension 8A of the blade shaft 8 and the transmission cover 12 as well as between the transmission cover 12 and the blade case 5, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention attaches a support boss for a cutting blade shaft to a cutting blade case via a vibration-proof member, and projects the cutting blade shaft from the upper surface of the cutting blade case to which the support boss is attached. The present invention relates to a mower in which a pulley for winding transmission is attached to an upper protruding portion of the cutting blade shaft.

[0002]

2. Description of the Related Art In this type of mower, since the cutting blade case forms a closed space forming a cutting space, the vibration of the cutting blade shaft is directly transmitted to the cutting blade case and vibration noise is generated. . Therefore, conventionally, a support boss that rotatably supports the cutting blade shaft has been attached to the cutting blade case via a vibration isolating member.

[0003]

As a result, the vibration of the cutting blade shaft can be prevented from being transmitted to the cutting blade case, and the generation of vibration noise can be suppressed. On the other hand, the support boss is prevented. Since it is supported by the vibrating member, the cutting blade shaft may fall down, and there is a disadvantage that the axial distance between the transmission pulley mounted on the cutting blade shaft and the mating pulley fluctuates. Therefore, the present applicants considered a configuration as shown in FIG. In this configuration, the support boss 9 is directly attached to the flat plate 17 thicker than the cutting blade case 5, and the thick flat plate 17 is supported by the cutting blade case 5 via the vibration isolating member 18, which is thicker than the vibration isolating member 18. By adopting a synergistic effect with the flat plate 17, the supporting boss 9 is attached to the thick flat plate 17 while the vibration damping effect is enhanced, so that the cutting blade shaft 8 is prevented from falling. However, since the cutting blade case 5 and the like are generally made of a thin plate and such a thin plate is sufficient from the viewpoint of function, the cutting blade case 5 and other constituent members are aimed only at the vibration damping effect. The use of a thick plate that lacks harmony with the above merely causes the weight of the device to be increased, and is not necessarily a complete improvement measure. An object of the present invention is to provide an object that can reduce vibration noise without inviting weight increase as a mower.

[0004]

A characteristic structure according to the present invention is that a cutting blade shaft is extended above a pulley, and the extending portion is supported by a transmission portion cover attached to the upper portion of the cutting blade case. At least one of the connecting portion between the transmission portion cover and the cutting blade case, and the supporting portion between the cutting blade shaft extension portion and the transmission portion cover is provided with a vibration isolating member, and its operation effect is It is as follows.

[0005]

That is, the support boss that supports the cutting blade shaft supports the cutting blade case via the vibration-proof member to cut off the transmission of vibrations from the cutting blade shaft to the cutting blade case. In order to prevent the support boss from falling due to vibration-proof support, the cutting blade shaft is extended above the pulley, and the extension is provided to cover the pulley. The cover is supported by the cover to prevent the cutting blade shaft from collapsing, and the transmission of vibrations by the support structure of the transmission cover and the cutting shaft is performed at the connecting portion between the transmission cover and the cutting case, and At least one of the supporting portions of the cutting blade shaft extension portion and the transmission portion cover is dealt with by a vibration isolating member provided.

[0006]

Therefore, by extending the cutting blade shaft to the position of the transmission section cover, the transmission section cover can be used as a support point for preventing the support boss from collapsing. While maintaining the structure of the support boss's anti-vibration support structure, etc., it is possible to prevent the cutting blade shaft from falling down, keep the inter-axis distance required for transmission to the cutting blade shaft, etc. It is possible to suppress the generation of vibration noise due to.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 6, the steering section 1 is arranged in the front part, the traveling drive section 2 is arranged from the middle part to the rear part, the driving part 3 is arranged in the rear part, and the front mower F is installed in the front part of the machine body. Make up machine.

The front mower F will be described. Grounding wheels 6 are arranged on the front and rear and on the left and right of the cutting blade case 5 which also serves as a main body and is attached to the machine body via the elevating link 4 so as to be movable, and in the internal space of the cutting blade case 5 in the cutting width direction. Three cutting blades 7 are installed along it. The support structure for one of the cutting blades 7 will be described. As shown in FIG. 1, a support boss 9 is attached to a predetermined position of the downwardly recessed portion 5A of the cutting blade case 5 via a rubber 16 as a vibration isolating member, and bearings 10 and 10 are provided inside the support boss 9. And supports the blade axis 8 rotatably vertically,
The cutting blade 7 is provided at the lower end of the cutting blade shaft 8. On the other hand, the concave portion 5 is provided on the protruding portion of the cutting blade shaft 8 protruding from the support boss 9.
A pulley 11 for winding transmission is attached and fixed in a state of being located in A. The support boss 9 has a downward recess 5
Pulleys 11 are attached to the cutting blade shafts 8 which are provided at a plurality of points A and are supported by the support bosses 9. The transmission case 12 covers the pulleys 11 so as to cover them.
Is attached to the cutting blade case 5 via the anti-vibration rubber 13. The pulley 11 mounting portion of the cutting blade shaft 8 is further extended upward, and its extended end is extended above the transmission portion case 12, and the following is provided between the extension portion 8A and the transmission portion case 12. There are various mechanisms. The bush 14 is fitted onto the extending portion 8A, and the outer peripheral surface of the bush 14 is subjected to a treatment such as baking to attach the anti-vibration rubber 15,
The anti-vibration rubber 15 is attached to the transmission case 12. As a result, it is possible to prevent the cutting blade shaft 8 from collapsing due to the vibration-proof support of the support boss 9, and to prevent a gap between the cutting blade case 5 and the transmission portion case 12 and between the cutting blade shaft 8 and the transmission portion case 12. The gap can be closed and the invasion of grass etc. can be prevented.

As shown in FIGS. 4 and 5, the cutting blade case 5
In the above, an inner wall 5B made of punching metal is stretched inward so as to correspond to a part of the outer peripheral wall surface, and a constant corridor is formed between the inner wall 5B and the outer peripheral wall surface in a portion where grass or the like is easily attached. The compressed air, water, or the like that blows off adhered grass or the like is ejected from the inner wall 5B. A in the figure is an inlet for inserting the air or the like.

[Other Embodiments] As a vibration isolator for supporting the transmission case 12, the transmission case 12 may be located between the transmission case 12 and the cutting blade shaft 8.
It suffices if it is between the cutting blade case 5 and the cutting blade case 5. This type of mower can be applied to a walking type lawn mower or the like in addition to the riding type.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a vibration-isolating support structure for a cutting blade shaft.

FIG. 2 is a vertical sectional side view showing a comparative example corresponding to FIG.

FIG. 3 is a plan view showing a mower.

FIG. 4 is a bottom view showing a state in which an air ejection port is provided on the side wall of the mower deck.

5 is a vertical cross-sectional side view showing the air ejection port of FIG.

FIG. 6 is a side view of a riding lawn mower.

[Explanation of symbols]

 5 Cutting Blade Case 8 Cutting Blade Shaft 8A Extending Part 9 Support Boss 11 Winding Transmission Pulley 12 Transmission Portion Cover 13, 15, 16 Anti-Vibration Member

Claims (1)

[Claims] 1. A cutting blade case (5) in which a supporting boss (9) for a cutting blade shaft is attached to a cutting blade case (5) through a vibration isolator (16) and the supporting boss (9) is attached.
The cutting blade shaft (8) protruding from the upper surface of the cutting blade shaft (8)
A mower in which a pulley (11) for winding transmission is attached to an upper protruding part of the cutting blade shaft (8) extending above the pulley (11),
The extending part (8A) is supported by a transmission part cover (12) attached to the upper part of the cutting blade case (5), and a connecting part between the transmission part cover (12) and the cutting blade case (5), A mower having a vibration isolating member (13 or 15) provided on at least one of the supporting portions of the cutting blade shaft extension (8A) and the transmission cover (12).