JPH0436643B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) TECHNICAL FIELD The present invention relates to a Guyang mower.

(Prior Art) In a gigantic mower having three reel mowers, the reel mower is provided at the rear of the tractor body, and a pair of arms are rotatably provided on both the left and right sides of the vehicle body by lift cylinders, and a pair of arms are provided at the tip end of each arm. , the reel mower located behind the arm is pivoted, and by operating the lift cylinder, the reel mower is extended horizontally to the outside of the vehicle body, and the reel mower is placed in a working posture in which the direction of tension of the reel mower matches the left and right direction. The position can be freely changed between a vertical position and a stored position.

Further, the reel mower has a cutting reel arranged in the longitudinal direction of the reel mower, and a hydraulic motor arranged at one end in the longitudinal direction of the reel mower to rotate the reel.
The hydraulic motor is disposed at the longitudinal end.

Further, between the left and right reel mowers of the vehicle body, there is provided a hydraulic oil supply body that is located at the same position in the front-rear direction as the hydraulic motors of the left and right reel mowers and supplies each reel mower hydraulic oil.

By the way, when the left and right reel mowers are put in the storage position, it is necessary to stop the hydraulic motor and stop the rotational drive of the reels in order to prevent danger. , a switching valve is provided in the same position as the arm in the longitudinal direction and is interposed in the oil passage between the supply body and the hydraulic motor, and when the reel mower is in the storage position, the operating body of the switching valve comes into contact with the arm. Then, the switching valve is operated, thereby stopping the supply of hydraulic oil to the hydraulic motor.

(Problem to be Solved by the Invention) However, in the past, as described above, the switching valve was located at approximately the same position as the arm in the front-rear direction, and in plan view, connected the hydraulic motors of the left and right reel mowers and the supply body. Since the supply body was removed from the straight line toward the front, there was a problem in that the piping from the supply body to the hydraulic motor was long.

An object of the present invention is to provide a gigantic mower that can solve the above problems.

(Means for Solving the Problems) In order to achieve the above object, the present invention is characterized in that a pair of steps 16 are provided on both left and right sides of the tractor body 4, and a pair of reel mowers are provided on both sides. The reel mower 2 can be freely changed into a working position in which the reel mower 2 is extended substantially horizontally to the outside of the car body 4 and the longitudinal direction of the reel mower 2 coincides with the left-right direction, and a storage position in which the reel mower 2 is in a substantially vertical position along the car body 4. , the reel mower 2 has a cutting reel 18 disposed in the longitudinal direction of the reel mower 2, and a hydraulic motor 19 disposed at the longitudinal end of the reel mower 2 to rotationally drive the reel 18. , a hydraulic oil supply body 45 that is located approximately at the same position as the hydraulic motor 19 in the front-rear direction and supplies hydraulic oil to the hydraulic motor 19;
A switching valve 46 is provided in the oil path between the supply body 45 and the hydraulic motor 19 and is actuated by contacting the operating body when the reel mower 2 is in the storage position to stop the supply of hydraulic oil to the hydraulic motor 19. The switching valve 46 is provided on the base side in the longitudinal direction of the reel mower 2, and the switching part 46 is connected to the hydraulic motor 1.
9 and the supply body 45 in the front-rear direction, and the operating body of the switching valve 46 is located at the step 16.

(Function) According to the present invention, when the left and right reel mowers 2 are in the storage position, the switching valve 46 comes into contact with the step 16 and stops the supply of hydraulic oil from the supply body 45 to the hydraulic motor 19.

(Embodiment) Hereinafter, an embodiment in which the present invention is applied to a gigang mower equipped with three reel mowers will be described based on the drawings. Figs. 1 to 4 show the gigang mower. A pair of front reel mowers 2 and rear reel mowers 3
and has.

Reference numeral 4 denotes a tractor body, which includes an engine 5, a transmission case 6, a front axle frame 7, etc., and the front axle frame 7 projects forward from the engine 5.

Reference numeral 8 denotes a hydraulic system for lifting and lowering the working machine, which is mounted on the rear part of the transmission case 6 and has a pair of left and right lift arms 9.

10 is a bonnet that covers the engine 5, etc.;
1 is a steering wheel, 12 is a front wheel, 13 is a rear wheel, 14 is a rear wheel fender, and 15 is a seat.

Reference numeral 16 denotes a pair of left and right steps that protrude outward from a midway point in the longitudinal direction of the mission case 6.

The reel mowers 2 and 3 include a machine frame 17, a cutting reel 18, a hydraulic motor 19, a cover 20,
It has front and rear rollers 21, 22, etc.

An upright portion 23 is provided at the center of the front portion of the machine frame 17 in the left-right direction.

The cutting reel 18 is arranged in the longitudinal direction of the reel mowers 2 and 3 at the center in the front and back direction,
It is covered with a cover 20.

The hydraulic motor 19 is connected to the left and right front reel mowers 2.
In this case, the reel 18 is provided at the tip end in the longitudinal direction.
It is arranged above the cover 20 and is rotatably driven through a winding transmission mechanism 24.

In addition, in the rear reel mower 3, the hydraulic motor 19
is provided at the left end of the rear reel mower 3. The left and right front reel mowers 2 are provided between the front and rear wheels 12 and 13 of the vehicle body 1 in the following manner.

That is, a pair of brackets 26 are fixedly installed on both left and right side surfaces of the longitudinally central portion of the vehicle body 1 in a manner that projects outwardly, and both the left and right brackets 26 are connected by front and rear connecting members 27 and 28. .

An arm 29 is rotatably supported at the outer end of each bracket 26 by a support shaft 30 in the front-rear direction.
A lift cylinder 31 for rotating each arm 29 is interposed between the base of each arm 29 and the front connecting member 27, and the arm 29 is connected to the front reel mower 2.
It is located on the diagonally upper front side of , and on the front side of the upright portion 23 .

The upper end of the erected portion 23 at the tip of the arm 29 is rotatably supported by a support shaft 32 in the front-rear direction, and rotation of the front reel mower 2 around the support shaft 32 causes the front reel mower 2 to move on the slope of the ground. etc.

Then, by the operation of the lift cylinder 31, the front reel mower 2 is placed in a working position in which it is horizontally extended outward from the vehicle body 4, as shown in the right part of FIG. In addition, the posture can be freely changed between a vertical posture along the vehicle body 4 and a stowed posture.

A stopper 33 is provided on the lower surface side of the arm 29 to bring the front reel mower 2 into a vertical position by coming into contact with the machine frame 17 or cover 20 when the front reel mower 2 is placed in the storage position.

The rear reel mower 3 is attached to the rear part of the vehicle body 4 via a three-point linkage mechanism 34 and a machine frame 35 in a manner that it can be raised and lowered as well as detachably. is supported by.

Next, the hydraulic drive system of the reel mowers 2 and 3 will be explained with reference to FIG.
is equipped with an oil tank 37, a second oil cleaner 38, and an oil cooler 39.

Reference numeral 40 denotes a hydraulic pump, which is attached to the front surface of the front axle frame 7 so as to project forward, and is rotationally driven by a PTO shaft which projects forward from the engine 5. A first oil cleaner 41 is provided on the right side of the hydraulic pump 40.

Reference numeral 42 denotes a hydraulic control valve, which is a 6-port 3-position switching valve and operates the reel 18 of each reel mower 2, 3 to forward, reverse, and stop. 43, and controls the hydraulic oil discharged from the hydraulic pump 40. 44 is a control lever.

45 is a block-shaped hydraulic oil supply body;
Several oil passages are formed and connected to the control valve 42 and each hydraulic motor 19, and the hydraulic oil discharged from the control valve 42 is sent from the supply body 45 to the hydraulic motor 19 of the right front reel mower 2 and the hydraulic oil supplied thereto. body 45, hydraulic motor 19 of left front reel mower 2, supply body 4
5, via the rear reel mower 3 and the supply body 45,
Alternatively, it is returned to the control valve 42 through a route opposite to that described above.

The supply body 45 is disposed below between the left and right front reel mowers 2 of the vehicle body 4 and is attached to the vehicle body 4, and is located at the same position in the longitudinal direction as the hydraulic motor 19 of the left and right front reel mowers 2. There is.

A pair of left and right front switching valves 46 are interposed between the supply body 45 and the hydraulic motor 19 of each front reel mower 2.

The front switching valve 46 is a 3-port 2-position switching valve, and can be freely switched between two positions: a supply position for supplying hydraulic oil to the hydraulic motor 19 and a stop position for stopping the supply of hydraulic oil to the hydraulic motor 19. It is biased toward the supply position by a spring 47, and has an operating body 48 for switching the front switching valve 46 to the stop position.

The front switching valve 46 is attached to the upper surface of the cover 20 and is located at the longitudinal base of the front reel mower 2 and at the center in the front and back direction, and is at the same position as the hydraulic motor 19 and the supply body 45 in the front and back direction, The front switching valve 46, the hydraulic motor 19, and the supply body 45 are
In plan view, they are arranged in parallel on a straight line in the left and right direction.

Each front switching valve 46 is connected to each hydraulic motor 19 and piping 4 such as a hydraulic pipe or hydraulic hose passing above the cover 20.
9, and at least a part of the piping 50 between each front switching valve 46 and the supply body 45 is constructed of a flexible hydraulic hose so as to be able to respond to changes in the attitude of the front reel mower 2. There is.

The left and right steps 16 are the front switching valves 46.
As shown in the left side of FIGS. 4 and 3, the operating body 48 of the front switching valve 46 comes into contact with the step 16 toward the end when the front reel mower 2 is in the storage position. When the front reel mower 2 is in the storage position or in the previous position, the front switching valve 46 is set to the stop position.

Also, a rear switching valve 51 is installed between the supply body 45 and the hydraulic motor 19 of the rear reel mower 3, and is arranged in parallel with the hydraulic control valve 42. Similarly to the front switching valve 46, the rear switching valve 51 is located at the supply position. It has two positions: and a stop position, and is manually operated by a control lever 52.

53 and 54 are couplers that can be connected and separated at will.

According to the embodiment configured as described above, during work, the left and right front reel mowers 2 are in the working posture, as shown in the right part of FIG. 3, and the front switching valve 46 is set to the supply position by the spring 47. At the same time, the rear reel mower 3 is also placed in a lowered position and in a working position. In this state, hydraulic oil is supplied from the hydraulic control valve 42 to the supply body 45, and the rear switching valve 51 is placed in the supply position.

As a result, hydraulic oil can be supplied to the hydraulic motors 19 of each reel mower 2, 3, and each reel 18 can be rotationally driven, and in this state, mowing work can be performed by moving the gigantic mower forward.

When changing the left and right front reel mowers 2 from the working position to the storage position, the lift cylinders 31
This causes arm 29 to operate.
rotates upward, and the front reel mower 2
rotates around the support shaft 32 and comes into contact with the stopper 33, taking the storage position as shown on the left side of FIG.

Then, at the end of the above posture change, as shown in FIG.
is the stopping position.

As a result, the supply of hydraulic oil to the hydraulic motor 19 of the front reel mower 2 is stopped, the reel 18 is stopped, and stability is ensured.

Incidentally, the present invention is also applicable to a gigantic mower having five reel mowers.

(Effects of the Invention) As detailed above, according to the present invention, the switching valves for the left and right reel mowers are provided at the longitudinal bases of the left and right reel mowers, and the switching valves are connected to the hydraulic motors of the left and right reel mowers. and the supply body, the switching valve, and the supply body, the switching valve,
Since the hydraulic motors of the left and right reel mowers are arranged approximately parallel to each other on a straight line in the left and right direction when viewed from above,
The piping between the supply body and the hydraulic motors of the left and right reel mowers can be shortened. Furthermore, as mentioned above, even though the switching valves for the left and right reel mowers are provided on the reel mower side, the operating body that operates the switching valves is a step, so there is no need to provide the switching valves separately on the vehicle body. do not have. The present invention has the above advantages,
It is very profitable.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, with FIG. 1 being an overall plan view, FIG. 2 being a side view, and FIG. 3 being a rear view.
FIG. 4 is a rear view of main parts different from FIG. 3, and FIG. 5 is a hydraulic circuit diagram. DESCRIPTION OF SYMBOLS 1... Tractor, 2, 3... Front/rear reel mower, 4... Tractor body, 16... Step, 18... Cutting reel, 19... Hydraulic motor, 29... Arm, 31... Lift cylinder ,
40...Hydraulic pump, 42...Hydraulic control valve, 45
...Hydraulic oil supply body, 46...Front switching valve, 47...
...Spring, 48...Operation body.

Claims (1)

[Claims] 1 A pair of steps 16 are provided on both left and right sides of the tractor body 4, and a pair of reel mowers 2 are provided on both sides of the tractor body 4 so that the longitudinal direction of the reel mowers 2 coincides with the left and right direction. The reel mower 2 is equipped with a cutting reel 18 disposed in the longitudinal direction of the reel mower 2 and a cutting reel 18 disposed in the longitudinal direction of the reel mower 2, and a cutting reel 18 disposed in the longitudinal direction of the reel mower 2. The hydraulic motor 19 is disposed at the tip and rotates the reel 18.
A hydraulic oil supply body 45 is provided at approximately the same position as 9 in the longitudinal direction and supplies hydraulic oil to the hydraulic motor 19, and is provided in the oil passage between the supply body 45 and the hydraulic motor 19 when the reel mower 2 is in the storage position. In a device equipped with a switching valve 46 that operates when it comes into contact with an operating body and stops the supply of hydraulic oil to the hydraulic motor 19, the switching valve 46 is provided on the base side in the longitudinal direction of the reel mower 2, and the switching valve 46 A gear mower characterized in that the hydraulic motor 19 and the supply body 45 are located at substantially the same position in the front-rear direction, and the operating body of the switching valve 46 is a step 16.