JP2760708B2 - Rear discharge mower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a bar blade which is rotatably driven inside a cutting blade housing, and which has at least a semicircular portion on the front side of the fuselage along the outer end locus of the bar blade. The present invention relates to a rear discharge mower configured to extend a surrounding vertical wall member from a ceiling surface of a cutting blade housing and discharge cut grass to a rear side of the machine body.

[0002]

2. Description of the Related Art In the above-mentioned rear discharge mower, conventionally, the vertical wall member is formed in a strip shape, and the lower edge of the vertical wall member is set at a position substantially lower than the lower edge of the cutting blade housing. .

[0003]

In the above conventional structure, the vertical wall member is disposed along the vicinity of the outer end locus of the bar blade, and the cut grass is cut off by the vertical wall member. The bar blade, which floats inward and rotates at high speed, is finely chopped so as to be efficiently dispersed to the rear side of the fuselage while being dropped and discharged. However, in the above-mentioned conventional structure, the vertical wall member is provided along the vicinity of the outer end trajectory of the bar blade. In this state, the bar blade is subjected to the cutting action, and there is a disadvantage that the possibility of uncut leaves increases. Then, in order to solve the above-mentioned drawbacks, it is conceivable to reduce the vertical width of the vertical wall member and set the lower edge to a high level to reduce the pushing down of the planted turf. A harmful effect occurs such that the particles are scattered outward from a gap formed below the vertical wall member and the above-described shredding function cannot be sufficiently exhibited. An object of the present invention is to solve the above disadvantages by rational structural improvement.

[0004]

A feature of the present invention is that a bar blade is rotatably driven inside a cutting blade housing, and is disposed at least in front of the fuselage along the vicinity of the outer end locus of the bar blade. In a rear discharge mower configured to extend a vertical wall member surrounding the side semicircular portion from the ceiling surface of the cutting blade housing and discharge the cut grass to the rear side of the fuselage, a front side of the vertical wall member in a cutting progress direction. In the part,
The point is that a plurality of vertical slits for planting turf passage are formed at small pitch intervals.

[0005]

The vertical wall member disposed along the outer edge locus of the bar blade has a plurality of vertical slits formed at small pitch intervals in a front side portion in the cutting progress direction of the vertical wall member. Even if the lower edge of the cutting blade housing is positioned at a lower position at substantially the same level as the lower edge of the cutting blade housing, and a wide vertical width is adopted, the planting turf passing through this slit remains in the vertical position by the vertical wall member. It will be introduced into the enclosed space. In other words, when the planted turf is introduced into the space surrounded by the vertical wall member, the planted turf is pushed down by the vertical wall member in a front-to-back oblique posture, compared to the case where no slit is formed. Can be prevented as much as possible. In addition, in order to prevent the planted turf from being pushed down by the vertical wall member in the forwardly inclined state, the lower edge of the vertical wall member is located at a position higher than the lower edge of the cutting blade housing over the entire area. Compared to the case of adopting a narrow top and bottom width, it is possible to drastically suppress the generated wind caused by grass clippings and bar blades from leaking outward, so that the bar blade in the space formed by the vertical wall member The shredding function by the rotation of the cut grass using the generated wind can be sufficiently ensured, and furthermore, the stones in contact with the bar blades are prevented from being flipped forward, and the discharge from behind is promoted. Therefore, it is possible to avoid such a problem that the same stone or the like comes into contact with the bar blade many times during the mowing traveling to promote the wear of the bar blade. In addition, since the outside air can be taken in from the slit and flowed backward along with the mowing travel, the cut grass can be smoothly discharged backward.

[0006]

Accordingly, the rear discharge which can reduce the remaining uncut portion of the planted turf as much as possible without greatly reducing the cut function of the cut turf, and can improve the durability of the bar blade. Moore can now be offered.

[0007]

Embodiments will be described below with reference to the drawings. FIG.
Shows a riding lawn mower. This lawn mower has a mower 1 mounted on the lower abdomen of the agricultural tractor via a parallel link mechanism so as to be able to move up and down, and a support mechanism for mounting a front loader (not shown) in front of the fuselage. As shown in FIGS. 3 and 4, the front loader support mechanism 2 is extended in the front-rear direction on both the left and right sides of the body, and is sub-frame 2 a bolted to the body front frame 3 and the rear transmission case 4. A support member 2b formed by bending a plate into a U-shape from the middle part in the front-rear direction to the lateral outside.
And a boss member 2c for inserting and connecting a vertical frame of a front loader to the outside of the support member 2b. Moore 1
Is pivotally connected to the machine body by a front link 5 and a rear link 6 in a parallel quadruple link shape, and is configured to be driven up and down as the lift arm 7 provided on the upper part of the transmission case 4 swings up and down. That is, the rotating member 9 that rotates in contact with and moves upward around the same axis near the lower link 8 that is moved up and down by the lift arm 7 and the middle part of the rear link 6 are linked and connected via the link mechanism 10. It is configured to drive up and down. The rear link 6 is pivotally connected to a fulcrum bracket 13 bolted to the side of a clutch housing 12 that is directly connected to the engine 11 of the fuselage. The rear link 6 is formed on the base end side of the support member 2b. Insertion hole 1
By connecting to the rear bracket 15 of the mower 1 via 4, the fulcrum position is raised, and the ground height of the mower at the time of ascent can be set high.

The mower 1 is of a rear discharge type that cuts the cut grass into fine pieces and discharges the cut grass to the rear side. As shown in FIG. 1, three bar blades 17 are arranged in parallel in a cutting blade housing 16 so as to be rotatable and rotatable about a vertical axis, respectively, and the body is arranged along the vicinity of the outer end locus of each bar blade 17. The vertical wall member 18 surrounding the front semicircular portion is provided so as to extend from the ceiling surface of the cutting blade housing 16, and the lawn grass guide plate 19 is formed from the rear end of the vertical wall member 18 to the rear side. The grass is then discharged to the rear of the machine. That is, the cut grass cut by the bar blade 17 is subjected to a plurality of cutting actions by the bar blade 17 rotating at a high speed while floating by the wind generated by the bar blade 17 in the space formed by the vertical wall member 18. The shredded turf is guided by the guide plate 19 as the fuselage advances, and is dropped and discharged to the rear side. Cutting blade housing 16
The center of the front side supports one ground idler wheel 20, and the rear side supports a plurality of ground idler wheels 21. The mower 1 moves up and down while following the ground by its own weight. It is configured as follows. The cut grass guide plate 19 is provided to prevent the cut grass from being caught on the ground idler wheel 21 located near the left and right center.
It is disposed on both left and right sides of the ground idler wheel 21. A rake member 23 is provided at the rear of the cutting blade housing 16 on the rear side of the cutting blade 22 so that the cutting blades are evenly distributed in a state of being uniformly dispersed.
As shown in FIG. 2, a plurality of vertical slits S for passing planted turf are formed at a small pitch interval on the front side portion of the vertical wall member 18 in the cutting progress direction so that the planted turf is in an upright posture as much as possible. The cutting action of the bar blade 17 can be received, and the cutting action of the cut grass by the bar blade 17 can be sufficiently exhibited, but the uncut portion caused by pushing down the planted grass by the vertical wall member 18 is minimized. It is made to let.

As described above, instead of the structure in which the rear side of the bar blade 17 is opened, the entire area in the circumferential direction of the outer end locus of the bar blade 17 is connected to the vertical wall member 18 on the rear side of the body of the bar blade 17. May be formed so as to further enhance the cutting lawn shredding function.

[0010] In the claims, reference numerals are provided to facilitate comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a bottom view of the mower.

FIG. 2 is a cutaway side view of the mower.

FIG. 3 is a cutaway front view of a rear link connecting portion.

FIG. 4 is a perspective view of a rear link connecting portion.

FIG. 5 is an overall side view of the lawn mower.

[Explanation of symbols]

 16 Cutting blade housing 17 Bar blade 18 Vertical wall member S Slit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-16913 (JP, A) JP-A 4-68630 (JP, U) JP-A 50-132571 (JP, U) (58) Investigation Field (Int.Cl. ⁶ , DB name) A01D 34/63-34/86

Claims (1)

(57) [Claims] 1. A bar blade (17) is rotatably driven on the inner side of a cutting blade housing (16), and at least a front half of the fuselage along the outer end locus of the bar blade (17). A rear discharge mower, wherein a vertical wall member (18) surrounding the circular portion is extended from a ceiling surface of the cutting blade housing (16) to discharge the cut grass to the rear side of the fuselage. Before the harvesting direction in (18)
A rear discharge mower in which a plurality of vertical slits (S) for passing planted turf are formed at small pitch intervals on a surface side portion .