JP5027764B2 - Riding mower - Google Patents

Description

  In the present invention, a mission case is disposed behind the mower, and left and right fuselage frames for mounting and supporting the mission case are disposed on both lateral sides of the mission case, and the mower is mowed from the rear end opening. The present invention relates to a riding-type mower configured as a rear discharge type for discharging.

  In a mid-mount type mower in which a mower is disposed between front and rear wheels, a mission case is disposed on the rear side of the mower. The rear discharge form is adopted so that the mowing grass shredded by the rotating blade in the mower deck is discharged from the mower deck space at an early stage (see Patent Document 1).

  There is one in which the mower adopting the above-described rear discharge form is applied to the following configuration. In other words, a mission case is arranged behind a rear discharge type mower, and this mission case is attached and fixed to a fuselage frame arranged on both the left and right sides of the mission case (see Non-Patent Document 1: Applicant of the present application). By filing).

Japanese Patent No. 2760708 (paragraph [0008], FIG. 5) Japanese Patent Application No. 2008-151892 (FIGS. 1 and 3)

  In the above configuration, there is a situation in which the mowing grass discharged from the mower enters and stays between the side surfaces of the rear mission case and the fuselage frame, or the accumulated mowing grass falls as a lump and disturbs the cutting trace. It may occur, and there is a risk that it may be difficult to process the grass.

  The object of the present invention is to prevent the mowing grass discharged from the mower from entering between the mission case and the fuselage frame by adding a simple mechanism between the mower and the mission case located behind the mower. The point is to provide a riding mower that can be used.

〔Constitution〕
The characterizing feature of the invention according to claim 1, behind the rear end opening of the mower, the cover body grass prevents the from entering between the transmission case and the left and right body frame provided, the cover body The upper end portion of the head is formed in a forward upward inclined posture , and the operation and effect thereof are as follows.

[Action and effect]
By providing a cover body, it is possible to prevent the cut grass from entering between the sides of the mission case and the fuselage frame. A situation such as disturbing the trace can be avoided in advance.
The upper end portion of the cover body is formed in a forward upward inclined posture so that the upper end portion of the cover body can be positioned above the opening for mower discharge of mower, and the grass cut out from the opening is upward Can be prevented from soaring.
As a result, it is possible to prevent the grass from accumulating on the upper surface of the mission case, and to avoid the grass from adhering to a radiator or the like other than the mission case.

〔Constitution〕
According to a second aspect of the present invention, there is provided a cover body for preventing cut grass from entering between the transmission case and the left and right body frames behind the rear end opening of the mower. The lower end portion of the head is formed in a rearward posture or a rearward downward inclined posture , and the operation and effect thereof are as follows.

[Action and effect]
By providing a cover body, it is possible to prevent the cut grass from entering between the sides of the mission case and the fuselage frame. A situation such as disturbing the trace can be avoided in advance.
Since the lower end portion of the cover body is formed in a rearward posture or a rearward downward inclined posture, the cut grass that comes into contact with the lower end portion of the cover body is guided rearward or rearward downward, so that the mowing grass does not rise upward. Guided on the ground.

〔Constitution〕
According to a third aspect of the present invention, the cover body includes an upper cover body portion positioned between the mission case and a body frame located on both left and right sides of the mission case, and left and right upper cover body portions. The lower cover body part which connects the lower end parts of each other has the following effects.

[Action and effect]
In other words, the upper cover body can prevent the grass from entering between the fuselage frame and the mission case, and the lower cover body is also placed in front of the mission case so that the grass cuts under the mission case. It is possible to prevent the mowing grass from being sprayed on the surface of the mission case while preventing this.

〔Constitution〕
According to a fourth aspect of the present invention, the cover body is formed in a U shape with a concave portion through which a PTO shaft projecting forward from the mission case is inserted for power extraction from the mower. It is in a certain point.

[Overall configuration of riding mower]
FIG. 1 shows the entire side surface of the riding mower according to the present invention, and FIG. 2 shows the entire plane. This riding-type mower includes a pair of left and right front wheels 11 configured as caster-type idler wheels on the front end side of the body frame 10, and a pair of left and right drive wheels on the rear end side of the body frame 10. A traveling machine body 1 is configured with a wheel 12, and a bar blade type mower 4 is suspended and supported between the front and rear wheels of the traveling machine body 1 so as to be movable up and down.

In the rear part of the traveling machine body 1, a prime mover 2 in which a water-cooled diesel engine 21 and a radiator 27 are housed in an engine bonnet 20 is provided in the rear frame part of the machine body frame 10, and the front and rear intermediate parts of the traveling machine body 1 Is provided with a driver's seat 13.
A gate-shaped lops 14 is erected and fixed substantially vertically at the rear of the driver seat 13. The lops 14 is configured to be foldable rearward around the fulcrum x1 at the upper and lower intermediate portions. By folding the lops 14 when mowing around the trunk of the tree, the operation can be performed without being caught by the branches over which the lops 14 are extended. It is configured as follows.
A step 15 located at the foot of the driver seat 13 is mounted on the front frame portion of the body frame 10, and fenders 16 are provided on the left and right sides of the driver seat 13.

  Since the structure of the transmission system is well known, detailed description of the structure is omitted. However, as shown in FIGS. 1 and 5, the output of the engine 21 is input to the mission case 22 so as to be divided into a traveling system and a working system. The power of the traveling system is branched and input to a pair of left and right hydro-hydraulic continuously variable transmissions (HST) 25 disposed on both the left and right sides of the mission case 22, and the shift output is output to the left and right rear wheels via the wheel case 23. 12 is transmitted.

  The hydrostatic continuously variable transmission 25 is attached to both sides of the transmission case 22, and the wheel cases 23 are attached to the lateral outer surfaces of the left and right hydrostatic continuously variable transmissions 25 via hydraulic blocks 28. Yes, the inwardly facing surface of the wheel case 23 toward the transmission case 22 is attached and fixed to the body frame 10 via a hydraulic block 28.

  The hydrostatic continuously variable transmission 25 that drives the left and right rear wheels 12 swings a pair of left and right traveling levers 17 arranged on both sides of the driver's seat 13 so as to be able to swing back and forth. The left and right rear wheels 12 are independently and continuously stepped forward and backward. From the neutral stop state shown in FIG. 1, the left and right traveling levers 17 can be operated in the same direction in the same direction, and can move forward and backward, and the left and right separately can perform a pivot turn and a spin turn. Yes.

[Moore configuration]
The mower 4 has a structure supported by being suspended through a link mechanism 18 having a four-link structure. As shown in FIGS. 1 and 3, the link mechanism 18 is configured to move up and down by an expansion and contraction operation of a hydraulic cylinder 19 connected to a part of the link mechanism 18 to move the mower 4 up and down substantially in parallel. is there.
The transmission of power to the mower 4 is carried out from the PTO shaft 24, which is an output shaft from the traveling vehicle body 1, in which the power of the work system branched by the transmission case 22 projects from the front lower portion of the transmission case 22. The engine power is output forward and the engine power is axially transmitted to the mower 4 via the PTO shaft 24 and the transmission shaft 3.

  The mower 4 has a three-sided rotary blade 41L, 41C, 41R that is rotationally driven around the longitudinal axis inside a mower deck 40 that is opened downward, so that the central rotary blade 41C is slightly displaced forward. It has a triangular arrangement and is supported by a shaft, and when the traveling machine body 1 moves straight forward, the left and right ends of the tip rotation trajectories of adjacent rotating blades 41L, 41C, 41R partially overlap. Therefore, mowing without cutting is possible.

As shown in FIGS. 3 and 4, the mower deck 40 is configured as a flat deck in which the height of the top plate is set to the same overall height, and the PTO shaft is positioned at the center of the upper surface of the mower deck 40. A bevel gear case 42 to which the working power taken out from 24 is transmitted is provided.
In this bevel gear case 42, the rotational power in the horizontal direction transmitted via the transmission shaft 3 is converted into vertical axis rotation via an internal bevel gear mechanism (not shown), and the rotational shaft 43C of the central rotary blade 41C is converted. Is configured to communicate.
The central rotating shaft 43C and the rotating shafts 43L, 43R of the left and right rotating blades 41L, 41R are interlocked by winding belts 45 around transmission pulleys 44, 44, 44 provided at the respective shaft ends. , 41C, 41R are driven to rotate at the same speed in the same direction (clockwise in plan view).

  An idle wheel (anti-scal roller) 47 for getting over obstacles is provided around the moor deck 40. The mower 4 is supported by being suspended by the link mechanism 18 with upward movement flexibility. When one of the freewheels 47 rides on a raised portion or the like, the mower 4 is lifted relatively, and the mower deck 40 is prevented from directly contacting and scraping the ground. ing.

  As shown in FIGS. 3 and 4, the mower deck 40 itself has a cut grass cutting space by a blade 41 by a wall 40B in a vertical posture from the front end to both side ends, and a rear end inclined wall that is inclined rearward and downward at the rear end. 40A. The lower end position of the rear end inclined wall 40A is positioned above the vertically oriented wall 40B, a rear end opening 40a is formed below the lower end of the rear end inclined wall 40A, and the mowing grass behind the rear end opening 40a. The mower 4 is configured to be a rear discharge type in order to release the.

A plate-like cover body 26 made of sheet metal that closes the space between the machine body frame 10 and the mission case 22 is provided, which will be described below. As shown in FIGS. 4 and 5, a plate-like cover body 26 is stretched across the left and right body frames 10 on the rear side of the rear end opening 40 a below the lower end of the rear end inclined wall 40 </ b> A of the mower 4. It is.
In addition, you may comprise the cover body 26 so that it may become easy to elastically deform with different materials, such as resin or a rubber plate.

  As shown in FIGS. 5 and 6, the plate-like cover body 26 is provided between the mission case 22 and the body frame 10 located on both the left and right sides of the mission case 22 and of the hydrostatic continuously variable transmission 25. The upper cover body portion 26A located in front and the lower cover body portion 26B connecting the lower end portions of the left and right upper cover body portions 26A are configured in a substantially U shape in a front view with an integrated plate.

  The plate-like cover body 26 forms a folded bracket part 26c at the side end of the upper cover body part 26A, and is attached to the body frame 10 via the bracket part 26c. A nut 26d is welded and fixed to the bracket 26c on the inside, and an easy structure is adopted for attaching the bolt from the outside.

An upper end portion 26a of the upper cover body portion 26A of the plate-like cover body 26 is formed in a forward upward inclined posture. With such a configuration, a configuration that is formed below the rear end inclined wall 40A of the mower deck 40 and is less likely to move to the engine 21 or the radiator 27 side by returning mowing grass and dust blowing up through the rear end opening 40a to the mower side. Is adopted.
With such a configuration, the engine 21 and the radiator 27 are less likely to be affected by the mowing grass.

  A lower end portion 26b of the lower cover body portion 26B of the plate-like cover body 26 is formed in a rearward posture. With such a configuration, it is possible to prevent the mowing grass and dust that bypass the lower end portion 26b of the lower cover body portion 26B from rising, and to move rearward so that the radiator 27 and the like are not affected. is there.

[Another embodiment]
(1) Although the radiator 27 and the engine 21 are arranged behind the mission case 22 in the above embodiment, the engine 21 may be arranged in the front part of the body.

  (2) In the above embodiment, the transmission case 22 and the fuselage frame 10 are mounted and fixed via the hydrostatic continuously variable transmission 25 and the deceleration case 23. One of the deceleration case 23 may be omitted.

(3) In the above embodiment, the upper end portion 26a of the cover body 26 is formed in a forward upward inclined posture, and the lower end portion 26b of the cover body 26 is formed in a rearward posture or a backward downward inclined posture. . However, it is not necessary to form the upper end portion 26a of the cover body 26 in a forward upward inclined posture, and it is not necessary to form the lower end portion 26b of the cover body 26 in a rearward posture or a backward downward inclined posture.
Specifically, as long as the upper end portion 26a of the cover body 26 protrudes forward, the upper end portion 26a may be formed, for example, in a forward-facing posture or a forward-downward posture, and the lower end portion 26b of the cover body 26 protrudes rearward. If it is a posture, for example, it may be formed in a rear upward posture.

(4) In the above embodiment, the upper end portion 26a and the lower end portion 26b of the cover body 26 are linearly formed. However, different shapes are adopted as the shapes of the upper end portion 26a and the lower end portion 26b of the cover body 26. For example, a curved or bent shape may be adopted.
In the above embodiment, the upper end portion 26a and the lower end portion 26b of the cover body 26 are integrally formed with the cover body 26. However, a part of the cover body 26 is made of a different material and different from the cover body 26 body. It may consist of a body. Specifically, for example, the upper end portion 26a or the lower end portion 26b of the cover body 26 is configured separately from the cover body 26 body with metal, resin, or rubber, and is detachably attached to the cover body 26 body. When the lower end portion 26b of the cover body 26 is configured to be detachable with, for example, a rubber plate, the rubber plate is suspended vertically from the cover body 26 body, and the rubber plate is elastically deformed when moving forward. You may comprise so that it may become the attitude | position which protruded back.

Overall side view of riding mower Overall plan view of a riding mower Plan view showing the mower part Longitudinal side view showing transmission structure from mower and mission case to mower Front view showing cover, mission case, etc. A perspective view showing a cover body

4 Moor 10 Airframe Frame 22 Mission Case
24 PTO shaft 26 plate-like cover body 26A upper cover body part 26B lower cover body part 26a upper end part 26b lower end part 40a rear end opening

Claims (4)

A rear discharge type in which a mission case is disposed behind the mower, and left and right fuselage frames are mounted and supported on both lateral sides of the mission case, and the mower is discharged from the rear end opening. A riding-type mower configured in
A cover body is provided behind the rear end opening of the mower to prevent mowed grass from entering between the mission case and the left and right body frames ,
The riding-type mower which the upper end part of the said cover body is formed in the front and upward inclination attitude | position . A rear discharge type in which a mission case is disposed behind the mower, and left and right fuselage frames are mounted and supported on both lateral sides of the mission case, and the mower is discharged from the rear end opening. A riding-type mower configured in
A cover body is provided behind the rear end opening of the mower to prevent mowed grass from entering between the mission case and the left and right body frames,
The riding-type grass mower in which the lower end portion of the cover body is formed in a rearward posture or a rearward downward inclined posture . An upper cover body part positioned between the mission case and the body frame located on the left and right sides of the mission case, and a lower cover body part connecting lower end parts of the left and right upper cover body parts The riding-type mower according to claim 1 or 2 , comprising: The cover body is formed in a U-shape with a concave portion through which a PTO shaft projecting forward from the transmission case for taking out power to the mower is inserted. The riding type mower according to one of the above.

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