JP2021036777A - Work vehicle - Google Patents

Abstract

To provide a work vehicle capable of improving attachability/detachability of a mower.SOLUTION: A work vehicle includes a pair of body frames provided side by side in a longitudinal direction, for supporting a transmission case inside, a lifting cylinder provided outside the body frame, for lifting the mower, and a mower lifting link mechanism provided outside the body frame, for connecting the mower to the lifting cylinder.SELECTED DRAWING: Figure 1

Description

The present invention relates to a work vehicle.

Conventionally, a work vehicle in which a moa is attached below a traveling vehicle body is known (see, for example, Patent Document 1).

Japanese Patent No. 4157777

By the way, the work vehicle may not require a mower, in which case the mower is removed from the traveling vehicle body. However, in the above-mentioned work vehicle, the detachability of the moa is not considered, and the work of attaching and detaching the moa may be difficult.

The present invention has been made in view of the above, and an object of the present invention is to provide a work vehicle for improving the detachability of a moa.

In order to solve the above-mentioned problems and achieve the object, a pair of work vehicles (1) according to one aspect of the embodiment are provided side by side in the left-right direction, and a vehicle body frame (22) that supports the transmission case (22) inward is provided. 12), an elevating cylinder (52) provided outside the vehicle body frame (12) to raise and lower the mower (5), and a mower (5) and an elevating cylinder (52) provided outside the vehicle body frame (12). It is characterized by including a mower elevating link mechanism (50) for connecting to and.

According to one aspect of the embodiment, the detachability of the moa can be improved.

FIG. 1 is a left side view of the work vehicle according to the embodiment. FIG. 2 is a schematic view of a part of the work vehicle according to the embodiment as viewed from the left. FIG. 3 is a schematic view of a part of the work vehicle according to the embodiment as viewed from the rear.

Hereinafter, embodiments of the work vehicle disclosed in the present application will be described in detail with reference to the accompanying drawings. The present invention is not limited to the embodiments shown below.

First, with reference to FIG. 1, the overall configuration of the work vehicle 1 will be briefly described. FIG. 1 is a left side view of the work vehicle 1 according to the embodiment. Here, a lawn mower will be described as an example of the work vehicle 1.

The work vehicle 1 is operated by a driver seated in a driver's seat 6a provided near the rear of the traveling vehicle body 2.

Further, in the following description, the front-rear direction is the traveling direction when the work vehicle 1 travels straight, and the front side of the traveling direction is defined as "front" and the rear side is defined as "rear". The traveling direction of the work vehicle 1 is a direction from the driver's seat 6a to the steering wheel 6b when the work vehicle 1 travels straight.

The left-right direction is a direction horizontally orthogonal to the front-rear direction. In the following explanation, left and right are defined toward the "front" side. That is, when the operator is seated in the driver's seat 6a and faces forward, the left hand side is "left" and the right hand side is "right". The vertical direction is a direction parallel to the vertical direction. The front-back direction, the left-right direction, and the up-down direction are orthogonal to each other in three dimensions. Each direction is defined for convenience in order to make the explanation easy to understand, and these directions do not limit the present invention. Further, in the following, the work vehicle 1 may be referred to as an airframe.

The work vehicle 1 is provided with a pair of left and right wheels (front wheels) 3 at the front portion of the traveling vehicle body 2, and is provided with a pair of left and right wheels (rear wheels) 4 at the rear portion of the traveling vehicle body 2. Further, the work vehicle 1 includes a mower 5 having a cutting blade that rotates around a vertical axis (in FIG. 1, an axis along the vertical direction) in the lower center of the traveling vehicle body 2.

The mower 5 cuts, for example, lawn by rotating the cutting blade. The mower 5 is provided near the center of the traveling vehicle body 2 in the front-rear direction. The mower 5 is attached below the traveling vehicle body 2 via a mower elevating link mechanism 50 (see FIG. 2).

The work vehicle 1 includes an engine 11 in a bonnet 10 at the front of the machine body. The engine 11 is supported by a pair of vehicle body frames 12 provided side by side in the left-right direction. The flywheel 14 is arranged in the engine 11 and the fan 15 is arranged in the rear.

Rotation is given to the fan 15 by the belt 17 wound around the output shaft 16 extending to the rear of the engine 11. The output shaft 16 of the engine 11 is connected to the distribution transmission shaft 20 by a universal joint 18. As a result, the power of the engine 11 is transmitted to the mission case 22 provided below the driver's seat 6a.

The mission case 22 is arranged inside the pair of body frames 12. That is, the mission case 22 is arranged between the pair of body frames 12. The HST pump 23, the HST motor 24, the oil pump 25, and the like are housed in the mission case 22.

The rotational power output from the distribution transmission shaft 20 is transmitted to the gear transmission device in the front axle case 27 via the universal joint 26 via the HST pump 23 and the HST motor 24. Further, the rotational power is transmitted from the gear transmission device to the front wheels 3 via the differential mechanism and the axle 3a.

Further, the rotational power output from the distribution transmission shaft 20 is transmitted to the gear transmission device of the rear axle case 28 via the HST pump 23 and the HST motor 24. Further, the rotational power is transmitted from the gear transmission device to the rear wheels 4 via the differential mechanism and the axle 4a.

Further, the rotational power output from the distribution transmission shaft 20 is transmitted to the mower PTO shaft 30. The rotational power output from the mower PTO shaft 30 is transmitted to the mower input shaft 32 via the universal joint 31. The rotational power transmitted to the moa input shaft 32 is transmitted to the cutting blade of the moa 5 via the moa transmission device in the moa 5. Further, the rotational power output from the distribution transmission shaft 20 is transmitted to the rear PTO shaft 33 (see FIG. 3).

The transmission case 22 is driven to switch between transmitting the rotational power output from the distribution transmission shaft 20 to only one of the front wheels 3 and the rear wheels 4 or transmitting it to both the front wheels 3 and the rear wheels 4. A switching device is provided.

Further, the mission case 22 is provided with a mower switching device for switching whether or not to transmit the rotational power output from the distribution transmission shaft 20 to the mower PTO shaft 30. Further, the mission case 22 is provided with a rear switching device for switching whether or not to transmit the rotational power output from the distribution transmission shaft 20 to the rear PTO shaft 33.

The mower 5 is a working machine for mowing the lawn, and is removable from the traveling vehicle body 2. The mower 5 can be attached to and detached from the traveling vehicle body 2 via the mower elevating link mechanism 50 shown in FIG. FIG. 2 is a schematic view of a part of the work vehicle 1 according to the embodiment as viewed from the left.

The mower elevating link mechanism 50 is provided on the outside of the vehicle body frame 12. Specifically, the mower elevating link mechanism 50 is provided outside the vehicle body frame 12 arranged on the left side of the pair of vehicle body frames 12. The mower elevating link mechanism 50 may be provided on the outside of the vehicle body frame 12 arranged on the right side.

The mower elevating link mechanism 50 is attached to the vehicle body frame 12. The mower elevating link mechanism 50 is removable from the vehicle body frame 12. The mower elevating link mechanism 50 is driven according to the expansion and contraction of the rod 52a of the hydraulic cylinder 52 (elevation cylinder) to elevate and elevate the mower 5. The mower elevating link mechanism 50 raises and lowers the mower 5 by rotating the connecting member 50a connected to the mower 5.

The hydraulic cylinder 52 is provided on the outside of the vehicle body frame 12. Specifically, the hydraulic cylinder 52 is provided on the outside of the vehicle body frame 12 arranged on the left side of the pair of vehicle body frames 12. The hydraulic cylinder 52 may be provided on the outside of the vehicle body frame 12 arranged on the right side.

The hydraulic cylinder 52 is attached to the vehicle body frame 12. Specifically, the hydraulic cylinder 52 is provided behind the axle 4a of the rear wheel 4 and is attached to the vehicle body frame 12 extending in the vertical direction. The hydraulic cylinder 52 is removable from the vehicle body frame 12.

As shown in FIG. 3, the hydraulic cylinder 52 is connected to the hydraulic hose connecting portion 61 by the hydraulic hose 60. FIG. 3 is a schematic view of a part of the work vehicle 1 according to the embodiment as viewed from the rear.

The hydraulic hose connection portion 61 is provided near the rear of the traveling vehicle body 2, and the oil pump 25 (see FIG. 1) supplies the oil pressure. The hydraulic hose connection portion 61 supplies and discharges the hydraulic pressure used for raising and lowering the work machine, for example, the mower 5 and the work machine connected to the rear PTO shaft 33. The hydraulic hose connecting portion 61 supplies and discharges the hydraulic pressure used for raising and lowering the mower 5 and the work machine connected to the rear PTO shaft 33 in response to the operator's lever operation or the like. For example, the hydraulic hose connection portion 61 is a hydraulic switching valve for supplying and discharging hydraulic pressure.

The hydraulic hose 60 is provided near the rear of the traveling vehicle body 2. Specifically, the hydraulic hose 60 is provided so as to pass behind the vehicle body frame 12, and connects the hydraulic cylinder 52 and the hydraulic hose connecting portion 61. The hydraulic hose 60 includes a hydraulic supply hose 60a that supplies hydraulic pressure to the hydraulic cylinder 52 and a hydraulic discharge hose 60b that discharges hydraulic pressure from the hydraulic cylinder 52.

In the work vehicle 1, the mower 5, the mower elevating link mechanism 50, and the hydraulic cylinder 52 can be attached to and detached from the vehicle body frame 12. Therefore, for example, when the mower 5 is not required, the mower 5 can be removed from the vehicle body frame 12.

Further, for example, after purchasing the work vehicle 1 without the mower 5 or the like, the mower 5 or the like can be additionally purchased and the mower 5 or the like can be attached. That is, the mower 5 and the like can be retrofitted.

Further, for example, even if the work vehicle 1 having the hydraulic cylinder 52 and the mower elevating link mechanism 50 and without the mower 5 is purchased, the mower 5 is additionally purchased and the mower 5 is attached. Good.

In the work vehicle 1, a mower elevating link mechanism 50 and a hydraulic cylinder 52 are provided on the outside of the vehicle body frame 12. Therefore, when the mower 5 is attached / detached, the operator can easily access the mower elevating link mechanism 50 from the left-right direction of the work vehicle 1, for example, from the left side, and the mower 5 can be easily attached / detached. Can be done. That is, the work vehicle 1 can improve the detachability of the mower 5.

Further, the operator can easily perform the work of attaching / detaching the mower elevating link mechanism 50 and the hydraulic cylinder 52 to / from the vehicle body frame 12. That is, the work vehicle 1 can improve the detachability of the mower elevating link mechanism 50 and the hydraulic cylinder 52 with respect to the vehicle body frame 12.

The hydraulic cylinder 52 is provided behind the axle 4a of the rear wheel 4. As a result, the space for arranging the mower elevating link mechanism 50 can be widened, and the degree of freedom in designing the mower elevating link mechanism 50 can be increased.

The hydraulic hose 60 connects the hydraulic hose connecting portion 61 provided at the rear side of the traveling vehicle body 2 and the hydraulic cylinder 52. Further, the hydraulic hose 60 is provided near the rear of the traveling vehicle body 2. As a result, when the hydraulic cylinder 52 is attached / detached to / from the vehicle body frame 12, the hydraulic hose 60 and the hydraulic cylinder 52 can be easily attached / detached. That is, the work vehicle 1 can improve the detachability of the hydraulic cylinder 52.

Further effects and variations can be easily derived by those skilled in the art. For this reason, the broader aspects of the invention are not limited to the particular details and representative embodiments expressed and described as described above. Therefore, various modifications can be made without departing from the spirit or scope of the general concept of the invention as defined by the appended claims and their equivalents.

1 Work vehicle 2 Traveling vehicle body 4 Rear wheel 4a Axle 5 Mower 12 Body frame 22 Mission case 50 Mower lifting link mechanism 52 Hydraulic cylinder (lifting cylinder)
60 Flood hose 61 Flood hose connection

Claims (3)

A pair of body frames that are arranged side by side in the left-right direction and support the transmission case inside,
An elevating cylinder provided on the outside of the vehicle body frame to raise and lower the mower,
A work vehicle provided on the outside of the vehicle body frame and provided with a moa elevating link mechanism for connecting the moa and the elevating cylinder. The elevating cylinder
The work vehicle according to claim 1, wherein the work vehicle is provided behind the axle of the rear wheel. With the hydraulic hose connection provided near the rear of the traveling vehicle body,
The work vehicle according to claim 2, wherein the hydraulic hose connecting portion and the elevating cylinder are connected to each other, and a hydraulic hose provided at the rear side of the traveling vehicle body is provided.