JP4324964B2 - Self-propelled riding mower - Google Patents

Description

  The present invention relates to a mower used for cutting weeds such as orchards and fallow fields, and more specifically, a self-propelled riding mower provided with a cutting device on the abdomen of a traveling vehicle body and a sub-cutter that can be opened and closed laterally. Related to the machine.

In Patent Document 1, a large-diameter main cutter is provided at the left and right center below the abdomen of the vehicle body, a fixed sub-cutter is provided at the side of the machine body, and a movable sub-cutter that can be opened and closed toward the vehicle body side around the fixed sub-cutter. A self-propelled riding mower provided is described. The sub-cutter unit comprising the fixed sub-cutter and the moving sub-cutter can swing up and down integrally by attaching the base of the fixed sub-cutter to the side of the traveling vehicle body.
JP 2002-315417 A

However, the sub-cutter unit of Patent Document 1 protrudes to the side larger than the vehicle body width even when stored rearward, and if the front of the fixed sub-cutter contacts an obstacle at this time, the sub-cutter unit may be damaged. The sub-cutter unit that protrudes to the side of the vehicle body has a problem in that it gets in the way when loaded onto a truck or the like.
The present invention solves the above-mentioned problem, can easily cut surrounding weeds such as trees, etc., and can reduce the protrusion of the sub cutter to the side of the body as much as possible during storage. It is an object to provide a machine.

A main cutter 5 and a sub-cutter 6 that can be opened and closed toward one side of the traveling vehicle body 3 are provided on the abdomen of the traveling vehicle body 3 that suspends the pair of left and right front wheels 1 and rear wheels 2. The rear wheel width W2 is arranged narrowly, and a large rear cutter 5a arranged with different front and rear mounting positions, and a main cutter 5 consisting of a front cutter 5b having the same diameter or a small diameter as the large diameter cutter 5a are provided. Self-propelled riding that forms a space B behind the front cutter 5b and that allows the entire sub-cutter 6 to be housed toward the outer part 2 of the rear wheel 2 within the front wheel width W1 with the front cutter 5b as the center. The mower configuration.
Further, the rear large-diameter cutter 5a disposed at different longitudinal mounting position, Ri front cutter 5b Tona of the large diameter cutters 5a substantially equal径乃optimum diameter, and, one side of the large diameter cutter 5a vehicle body 3 the main cutter 5 which arranged offset to providing self-propelled riding along with forming the space B behind the front cutter 5b, formed by allowing housing toward the sub-cutter 6 around the front cutter 5b to space B The mower configuration.

According to the first aspect of the present invention, a main cutter 5 and a sub-cutter 6 that can be opened and closed toward one side of the traveling vehicle body 3 are provided on the abdomen of the traveling vehicle body 3 that suspends the pair of left and right front wheels 1 and rear wheels 2. In addition, both the rear wheel width W2 are arranged narrower than the both front wheel widths W1, and the rear large-diameter cutter 5a is arranged with different front and rear mounting positions, and the large-diameter cutter 5a is substantially the same diameter or a small-diameter front cutter. A main cutter 5 comprising 5b is provided, a space B is formed behind the front cutter 5b, and substantially the entire sub-cutter 6 is directed toward the outer portion 2 of the rear wheel 2 within the front wheel width W1 with the front cutter 5b as the center. Since it is configured to be stowable, the space on the outer side A of the rear wheel 2 can be effectively used, and the sub cutter 6 can be stowed with as few protrusions as possible to the side of the vehicle body 3 as much as possible. Sub-cutter when loading It never gets in the way.
When the sub-cutter 6 is opened to the side of the vehicle body 3, the center of gravity of the vehicle body 3 moves to the sub-cutter 6 side, but in the present invention, the front wheels having both front wheel widths W1 wider than both rear wheel widths W2. 1 Even if the sub-cutter 6 is opened toward the side of the vehicle body 3 around the front cutter 5b provided in the vicinity of the vehicle 1 and the center of gravity of the vehicle body 3 moves to the side of the sub-cutter 6, the lateral balance of the vehicle body 3 is deteriorated due to the movement of the center of gravity. Since it is securely supported by the wide front wheel 1, even if both rear wheel widths W2 are arranged narrowly, the left and right balance of the vehicle body 3 is lost and the sub-cutter 6 is grounded and the cutting height does not change and is stable. Mowing work is possible.
Furthermore, since the sub cutter 6 can be stored in the space B formed at the rear of the front cutter 5b and the outer portion A of the rear wheel 2, the length of the sub cutter 6 can be increased, and the main cutter 5 and the sub cutter 6 can be configured. Thus, it is possible to work with a wider cutting width.

According to the second aspect of the present invention, a main cutter 5 and a sub-cutter 6 that can be opened and closed toward one side of the traveling vehicle body 3 are provided on the abdomen of the traveling vehicle body 3 that suspends the pair of left and right front wheels 1 and rear wheels 2. in the rear large-diameter cutter 5a disposed at different longitudinal mounting position, Ri front cutter 5b Tona of the large diameter cutters 5a substantially equal径乃optimum diameter, and, one side of the large diameter cutter 5a vehicle body 3 the main cutter 5 which arranged offset to provided to form a space B behind the front cutter 5b, since the sub-cutter 6 around the front cutter 5b are accommodated capable configuration toward the space portion B, The space B is further formed wider by the arrangement of the large-diameter cutter 5a and the front cutter 5b.

Next, the present invention will be described with reference to the drawings. The self-propelled riding mower according to the present invention includes a pair of left and right front wheels 1 in front of the traveling vehicle body 3 and a pair of left and right rear wheels 2 in the rear, and the rear wheel width W2 is arranged narrower than the left and right front wheel widths W1. It is. A seat 10 on which a driver sits is provided at the front and rear center of the traveling vehicle body 3, and a handle 11 for steering the front wheels 1 is provided in front of the seat 10. An engine 12 is disposed behind the seat 10 and an upper portion of the engine 12 is covered with a cover 13. Inside the cover 13, in addition to the engine 12, engine-related parts such as a fuel tank 14 and an exhaust muffler 15 are accommodated.
The engine 12 is a vertical type in which an output shaft 16 is suspended, and travel and drive blades are driven by an engine pulley 17 attached to the output shaft 16. A V-belt 19 is wound around the engine pulley 17 and a pulley 18 behind the engine pulley 17, and the driving force of the engine 12 is transmitted to an HST (hydraulic continuously variable transmission) 20, and a rear wheel is connected via a transmission 21 integrated with the HST 20. 2 is transmitted.

A main cutter 5 that can be raised and lowered to an arbitrary height is provided at the lower abdomen of the traveling vehicle body 3 between the front wheel 1 and the rear wheel 2. The main cutter 5 is provided with a large diameter cutter 5a at the right rear portion of the abdomen of the traveling vehicle body 3, a front cutter 5b is provided at a position approaching the left front wheel 1 at the left front portion, and covers the upper portion of the large diameter cutter 5a and the front cutter 5b. 22 is covered. Pulleys 23 and 24 for rotationally driving each of them are attached above the large-diameter cutter 5a and the front cutter 5b, and the drive of the pulley 18 of the engine 12 is transmitted by V-belts 25 and 26. Further, a clutch mechanism is interposed in the V-belt 25 wound between the pulley 18 and the pulley 23, and a clutch lever 28 provided in an operation box 27 on the left side of the seat 10 is inserted in the front-rear direction and turned off. The main cutter 5 can be driven intermittently. These transmission modes are not limited to the V-belt configuration, but may be a transmission configuration using a shaft, a gear, a chain, or the like.

The large-diameter cutter 5a and the front cutter 5b can cut grass with a cutting width that is substantially the same width as the front wheel width W1 by rotating the strip-shaped cutters 5a and 5b substantially horizontally. Both cutters 5a and 5b are arranged so that their tip rotation trajectories are separated from each other so that the large-diameter cutter 5a that greatly bends up and down during the mowing operation does not come into contact with the front cutter 5b. Further, the inner sides of the cutters 5a and 5b are overlapped in the front-rear extension line direction so that there is no uncut grass due to the spacing between the cutters 5a and 5b.
The front cutter 5b is provided with a sub-cutter 6 that can be opened and closed to the side of the vehicle body 3 around the front cutter 5b. FIG. 1 and FIG. 2 show that the sub-cutter 6 is composed of two series of horizontally-rotating cutters 6a. If the sub-cutter 6 is opened to the side of the vehicle body 3, the cutting width wider than the cutting width of the main cutter 5 is shown. Mowing work at can be done. In addition, the cutter 6a of the sub cutter 6 may be single, and may be arranged in parallel by three or four.
A large diameter cutter 5a in the right rear portion of the vehicle body 3 the abdomen, the front cutter 5b arranged left front portion and to approach the front cutter 5b on the left front wheel 1, to open the sub-cutter 6 to the vehicle body 3 left side, the center of gravity of the vehicle body 3 Even if the position moves in the direction in which the sub-cutter 6 is opened, the wide front wheel 1 sufficiently supports the weight of the sub-cutter 6, the left-right balance is lost, the vehicle body 3 is tilted, the sub-cutter 6 is grounded, and the cutting height Stable mowing work can be done without any change.
Further, when both rear wheel widths W2 are arranged narrower than both front wheel widths W1, a storage space for the sub-cutter 6 can be formed at the rear of the front cutter 5b and at the outer part A of both the rear wheels 2. it can. If the sub-cutter 6 is stored in this storage space, it is possible to store substantially the entire sub-cutter 6 in the abdomen of the vehicle body 3. During storage, the sub-cutter 6 does not protrude greatly to the side, and a truck or the like Can be easily loaded.
Furthermore, the sub-cutter 6 can be extended toward the outer side A of the left rear wheel 2, so that a mowing operation with a wide cutting width can be performed.

Transmission to the sub-cutter 6 is performed by the V belts 29 and 30 from the pulley 24 of the front cutter 5 b, and the V belts 26, 29, and 30 are always held in tension by a tension 31. Accordingly, when the clutch lever 28 is turned on, all the cutters 5a, 5b, and 6a rotate in the same direction, convey the cut grass to the right side of the vehicle body 3, and discharge most of it toward the rear right side C of the vehicle body 3. It is preferable that a clutch mechanism is interposed between the sub-cutter 6 and the front cutter 5b so that transmission to the sub-cutter 6 is cut off when the sub-cutter 6 is stored. The rear wheel 2 behind the discharge port 31 is located inside the vehicle body 3, and the discharge port 31 that is largely open to the outer side A of the right rear wheel 2 can smoothly discharge the grass and the rear wheel 2 can remove the grass. There is no mess and the cuts are clean.

  Although the sub cutter 6 can support the center of the opening and closing movement on the vehicle body 3, in this embodiment, the main cutter 5 and the sub cutter 6 are configured to be able to move up and down integrally, and the cutting height of the grass is increased. Can be adjusted. Specifically, the cover 22 above the main cutter 5 and the vehicle body 3 above the upper cutter 22 are connected by two pairs of parallel link rods 32 and 33, and the lifting rod 34 pivotally supported on the upper surface of the cover 22 is moved up and down. Ascend and descend as a unit. The cutting height is adjusted by an adjustment lever 35 provided in the operation box 27, and the lifting / lowering drive of the lifting / lowering rod 34 can be performed by means using a manual lever, an actuator, a motor, or the like.

A detection rod 36 for detecting an obstacle is provided in front of the sub cutter 6. The sub cutter 6 and the cover 22 of the main cutter 5 are connected by a cylinder (not shown), and the sub cutter 6 can be opened and closed around the front cutter 5b by expanding and contracting the cylinder. FIG. 3 shows an avoidance operation state of the sub-cutter 6 when the tree 37 serving as an obstacle contacts the front of the sub-cutter 6. During the forward-moving mowing operation, when the tree 37 comes into contact with the detection rod 36 in front of the sub-cutter 6 that is open to the side of the vehicle body 3 and the detection rod 36 is pushed backward, the sub-cutter 6 is pushed in the opening direction. When the pressure of the cylinder is released and the vehicle body 3 is further advanced, the sub cutter 6 avoids the tree 37 while rotating backward along the tree 37. When the detection rod 36 advances to the non-contact state with the tree 37, pressure is applied to the cylinder again, and the sub-cutter 6 is pressed in the opening direction to return to the open state. With this configuration, even when the tree 37 is approaching the vehicle body 3 side, that is, when the tree 37 is approached to the front wheel 1 and the mowing operation is performed, the sub-cutter 6 is not damaged, and the tree 37 is damaged. Nor. Further, since the substantially entire sub-cutter 6 can be stored in the front wheel width W1 of the abdomen of the vehicle body 3, mowing work can be easily performed in a narrow place, and loading work on the vehicle when the mowing machine is transported can be easily performed. Also, the sub-cutter 6 does not get in the way during storage in the warehouse.

FIG. 4 shows a configuration of another embodiment of the main cutter 5 and the sub cutter 6. In any of the embodiments, both rear wheel widths W2 are narrower than both front wheel widths W1, and a main cutter 5 is provided on the abdomen of the vehicle body 3 between the front and rear wheels 1 and 2 so that the vehicle body 3 can be opened and closed laterally. A cutter 6 is provided. Each of the sub cutters 6 is configured to be retractable toward the outer portion A of the rear wheel 2.
(A) shows that a single large-diameter main cutter 5 capable of cutting grass with a cutting width substantially the same as the width of the vehicle body 3 is provided at the center of the left and right of the vehicle body 3, and a sub A cutter 6 is provided.
In (b), the main cutter 5 is configured to have three identical diameters, and a sub-cutter 6 that can be rotated around the main cutter 5 at the end is provided. The main cutter 5 and the first stage sub-cutter 38 have the same diameter, and the parts are shared. Further, the second stage sub-cutter 39 can be formed in a small diameter and stored in the outer portion A of the rear wheel 2.
(C) shows that the cutters 5a and 5b of the main cutter 5 have the same diameter, are arranged with different front and rear mounting positions, and can open and close the three sub-cutters 6 around the front cutter 5b on the front side. It is configured.
(D) shows a configuration in which the same main cutter 5 as that in (c) is provided, and the entire sub cutter 6 can be accommodated in the front wheel width W1 of the outer portion A of the rear wheel 2.

Overall plan view. Overall side view. The operation diagram which shows the operation | movement of a sub cutter. The principal part top view which shows another Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front wheel 2 Rear wheel 3 Car body 5 Main cutter 5a Large diameter cutter 5b Front cutter 6 Sub cutter A Outer part B Space part

Claims (2)

A main cutter (5) on the abdomen of the traveling vehicle body (3) that suspends the pair of left and right front wheels (1) and rear wheels (2), and a sub-cutter (6) that can be opened and closed toward one side of the traveling vehicle body (3) And a rear large diameter cutter (5a) in which both rear wheel widths (W2) are arranged narrowly with respect to both front wheel widths (W1) and the front and rear mounting positions are different, and the large diameter cutter ( 5a) is provided with a main cutter (5) consisting of a front cutter (5b) having a diameter substantially the same as or smaller than that of the front cutter (5b). A space (B) is formed behind the front cutter (5b), and the front cutter (5b) is the center. A self-propelled riding mower configured such that substantially the entire sub-cutter (6) can be accommodated toward the rear wheel (2) and the outer portion (A) in both front wheel widths (W1) . A main cutter (5) on the abdomen of the traveling vehicle body (3) that suspends the pair of left and right front wheels (1) and rear wheels (2), and a sub-cutter (6) that can be opened and closed toward one side of the traveling vehicle body (3) to provide the door, the rear large-diameter cutter disposed at different longitudinal mounting position (5a), Ri front cutter (5b) Tona having substantially the same径乃optimal diameter and large-diameter cutter (5a), and large-diameter cutter main cutter placing (5a) the vehicle body (3) and biased to one side towards the (5) is provided, said front cutter (5b) space the rear (B) to form a front cutter (5b) A self-propelled riding mower configured so that the sub-cutter (6) can be stored toward the space (B) with a center.

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