JP3821680B2 - Mower - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, a mower is disposed between the front wheel and the rear wheel in a side view, a driver seat is disposed in an upper part of the rear wheel in a side view, and a protective frame having a pair of left and right support columns is provided. It relates to mowers.
[0002]
[Prior art]
In conventional mowers, the protective frame is connected and supported at a position behind the rear axle case that pivotally supports the rear wheel of the body frame.
[0003]
[Problems to be solved by the invention]
However, according to the above-described conventional technique, the center of gravity of the vehicle body is shifted rearward due to the attachment of the protective frame, and thus there is a possibility that the front-rear balance of the vehicle body is deteriorated. This tendency is particularly strong in mowers equipped with heavy engines behind the rear wheels.
[0004]
An object of the present invention is to maintain a good front-rear balance of the vehicle body while providing a protective frame.
[0005]
[Means for Solving the Problems]
The mower according to the first aspect of the present invention is characterized in that a mower is disposed between the front wheel and the rear wheel, a driver seat is disposed above the rear wheel in a side view, and a pair of left and right support columns are provided. A mower with a protective frame,
A rear axle case for transmitting power to the rear wheel is disposed along the outer side of the pair of left and right body frames provided along the longitudinal direction of the body in the lateral direction of the body, and the axle of the rear axle case A support frame that supports the base end portion of the support column in the protective frame is disposed across the support location and the machine body frame on the front side of the aircraft from the axle support location,
The base end portion mounting position of the support column in the protective frame with respect to the support frame is positioned outside the rear axle case in the left-right direction in the front-rear direction, below the driver seat in the side view, and on the rear wheel together is located at the front end adjacent portion, is positioned on the axle of the same level or almost the same level of the rear wheel,
The column portion extends in a side view below the driver seat at the base end portion and obliquely rearward and upward from a position near the front end of the rear wheel and extends upward through a position near the backrest of the driver seat. In the point.
[0006]
[0007]
A feature of the mower according to the present invention according to claim 2 is that, in the mower according to the present invention according to claim 1 , the strut portion is arranged in a state of wrapping around the left and right outer sides of the rear wheel fender with respect to the rear wheel. is there.
[0008]
The mowing machine according to the present invention according to claim 3 is characterized in that, in the mowing machine according to the present invention according to claim 1 or 2 , the operating tool is disposed on the left and right inner sides of the supporting column so that the supporting column is a protector of the operating tool. There is in point.
[0009]
The mower according to the present invention according to claim 4 is characterized in that, in the mower according to the present invention according to claims 1, 2 , and 3 , the fuel tank is disposed on the left and right inner sides of the strut so that the strut is a protector of the fuel tank. It is in the point where it is arranged.
[0010]
The mower according to the present invention according to claim 5 is characterized in that in the mower according to the present invention according to claims 1, 2 , 3 , and 4 , the front wheel is a pair of left and right caster wheels, and the rear wheel is a pair of left and right wheels. These are a pair of left and right drive wheels that are independently driven by each of the hydrostatic continuously variable transmissions that can be switched forward and backward, and that the engine is mounted at the rear of the rear wheels.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIGS. 1 to 3, the mowing machine has a body frame 3 including a pair of left and right front wheels 1 and a pair of left and right driving rear wheels 2 that are used on caster wheels. The driver's seat 4 is supported in a state of being disposed on the front side, and the mower 5 is supported in a vertically movable manner via the front link 6 and the rear link 7 in a state of being disposed between the front wheel 1 and the driving rear wheel 2 in a side view. And a hydraulic cylinder that mounts and supports the engine 8 in a state of being arranged behind the driver seat 4 in a side view, and raises the mower 5 with pressure oil supply and lowers the mower 5 with its own weight when oil is discharged. A lift cylinder 9 for use is provided.
[0012]
The front wheel 1 is supported by the body frame 3 via a wheel support frame 10, and the wheel support frame 10 is arranged around a longitudinal axis P located at the center of the left and right of the body as shown in FIGS. 7 and 8. The left and right front wheels 1 are mounted on the left and right ends of the wheel support frame 10.
[0013]
As shown in FIGS. 7 and 8, the means for pivotally connecting the wheel support frame 10 to the body frame 3 is inserted into a boss 11 fixed to the wheel support frame 10 so that the wheel support frame 10 is axially oriented P. A support shaft 12 that is supported so as to be swingable around is supported on both sides of the body frame 3, and the boss 11 is mounted on the body of the rear end portion of the support shaft 12 by tightening a nut 13 screwed into the front end portion. This is a means for integrally forming the enlarged diameter pressing portion 12a pressed against the front frame portion 3a of the frame 3. In other words, by tightening the nut 13 according to the wear of the boss 11 and the front frame portion 3a due to the swinging of the wheel support frame 10, the rattling between the boss 11 and the front frame portion 3a is absorbed. Thus, the wheel support case 10 can always swing smoothly and stably. The nut 13 is constituted by a grooved nut that engages with a pin 14 inserted through the support shaft 12 and is prevented from loosening.
Reference numeral 15 denotes a bush for swingably supporting the diameter-enlarged pressing portion 12 a on the rear frame portion 3 b of the machine body frame 3, and 16 denotes a collar that forms a contact surface of the nut 13.
[0014]
Further, bolts 17 that are in contact with the rear surface of the wheel support frame 10 and prevent yawing of the wheel support frame 10 are screwed onto the rear frame portion 3b at positions spaced apart from the support shaft 12 to the left and right. ing. That is, by adjusting the screwing amount, the contact state with the wheel support frame 10 is always maintained corresponding to the rattling caused by the tightening of the nut 13 against the wear. Reference numeral 18 denotes a lock nut.
[0015]
Further, the front and upper surfaces of the pivot connecting portion by the support shaft 12 and the bolt 17 are covered with a front mask 19. The front mask 19 can be switched between a cover state and an open state by swinging around the left and right axis x, and means for holding the cover state is in an open state accompanying the operation of the front mask 19. This is means for providing a substantially U-shaped catcher 20 on the body frame 3 that elastically engages with an engaging portion 19a attached to the front mask 19 in a state that allows the swing of the front mask 19 to maintain the front mask 19 in a cover state.
[0016]
The left and right driving rear wheels 2 are respectively supported by the body frame 3 via a rear axle case 21, and in the vicinity of the rear axle case 21, as shown in FIG. Are respectively input to the corresponding rear axle cases 21, that is, a pair of left and right hydrostatic continuously variable transmissions 22 that independently drive the driving rear wheels 2 are arranged. That is, in this mower, the left and right continuously variable transmissions 22 are set to the same shift state to perform forward and reverse straight travel, and the left and right continuously variable transmissions 22 are set to different shift states to thereby change the low speed side continuously variable transmission 22. The center of the left and right driving rear wheels 2 is centered by turning the driving rear wheel 2 inside the turning and setting the one continuously variable transmission 22 in the forward state and the other continuously variable transmission 22 in the backward state. A turn around the turning center is performed. Reference numeral 23 denotes a steering lever for operating the continuously variable transmission 22 in an exceptional manner. When the steering lever is operated forward, the continuously variable transmission 22 is operated forward and increased, and when operated backward, The step transmission 22 is operated to increase backward. Each of the rear axle cases 21 is provided with a parking brake B.
[0017]
As shown in FIG. 4, between the left and right continuously variable transmissions 22, the power transmission to the mower 5 and the counter shaft 24 that distributes and transmits the power of the engine 8 to the left and right continuously variable transmissions 22 is intermittent. A transmission case 26 having a working clutch 25 is arranged.
[0018]
As shown in FIGS. 2 and 3, an operation tool 28 is disposed on the right side of the driver seat 4 so as to vertically penetrate the rear wheel fender 27 with respect to the driving rear wheel 2. The operation tool 28 includes a lift lever 28a for operating the lift cylinder 9, a work clutch lever 28b for operating the work clutch 25, and a hand for operating a carburetor (not shown) of the engine 8. An accelerator lever 28c.
[0019]
On the left side of the driver's seat 4, as shown in FIGS. 2 and 3, a parking brake lever 29 for operating the parking brake B is disposed so as to penetrate the rear wheel fender 27 up and down, The fuel tank 30 is disposed in a state of being positioned above the rear wheel fender 27.
[0020]
And in the mower, the protective frame 31 provided with the left-right paired support | pillar part 31A is provided.
[0021]
As shown in detail in FIGS. 5 and 6, the base end portion 31 a of the support column portion 31 </ b> A is located at a position near the front of the driving rear wheel 2 and at the same level or substantially the same as the axle 2 a of the driving rear wheel 2. It is attached to the fuselage frame 3 via a support frame 32 that extends between the rear axle case 21 and the fuselage frame 3 while being positioned at the level.
[0022]
The support 31A is disposed in a state of wrapping around the left and right outer sides of the rear wheel fender 27. In other words, the right column 31A is disposed on the right outer side of the operation tool 28 so as to be a protector of the operation tool 28, and the left column 31A is a protector for the parking brake lever 29 and the fuel tank 30. Thus, the parking brake lever 29 and the fuel tank 30 are arranged on the left outer side.
Further, the fuel inlet 30a of the fuel tank 30 is disposed and formed in front of the left column 31A in a side view.
[0023]
The mower 5 has a structure in which three blades are juxtaposed in the left-right direction,
Power is transmitted through the power take-out shaft 33 of the mission case 26.
[0024]
【The invention's effect】
According to the first aspect of the present invention, the center of gravity of the vehicle body is shifted rearward as the protective frame is attached because the base end portion of the support column is attached to the body frame in a state where it is positioned at the front approaching position of the rear wheel. Can be eliminated or reduced.
[0025]
In addition, since the base end portion is located at the same level or substantially the same level as the rear wheel axle, it is possible to eliminate or reduce the rise of the center of gravity of the vehicle body as the protective frame is attached.
[0026]
Accordingly, the front-rear balance of the vehicle body can be maintained well while the protective frame is provided, and the stability of the vehicle body due to the low center of gravity can be maintained well.
[0027]
In addition, since the base end of the support post is attached to the fuselage frame via the support frame, the weight of the heavy support frame located at a low position such as the same level or almost the same level as the axle reduces the center of gravity of the fuselage. Contribute.
[0028]
Therefore, the stability of the aircraft can be further improved by lowering the center of gravity of the aircraft by providing the protective frame.
[0029]
In particular, when the present invention according to claim 2 is used, since the support column is arranged in a state of wrapping around the left and right outer sides of the rear wheel fender, the support column acts as a protector for the rear wheel fender.
[0030]
Therefore, the rear wheel fender can be protected at the same time.
[0031]
Further, according to the third aspect of the present invention, since the operation tool is disposed on the left and right inner sides of the support column and the support column is used as a protector of the operation tool, the operation tool can be protected by the support column.
[0032]
Therefore, the operation tool can be protected at the same time.
[0033]
According to the fourth aspect of the present invention, since the fuel tank is disposed on the left and right inner sides of the support column and the support column is used as the protector of the fuel tank, the fuel tank can be protected by the support column.
[0034]
Therefore, the fuel tank can be protected at the same time.
[Brief description of the drawings]
[Fig. 1] Side view [Fig. 2] Plan view [Fig. 3] Rear view [Fig. 4] Transmission system diagram [Fig. 5] Side view of essential parts [Fig. 6] Rear view of essential parts [Figure 7] Longitudinal side view [Fig. 8] Cross-sectional plan view of the main part
DESCRIPTION OF SYMBOLS 1 Front wheel 2 Rear wheel 5 Moore 4 Driver's seat 31A Support | pillar part 31 Protection frame 31a Base end part 2a Axle 3 Airframe frame 21 Rear axle case 32 Support frame 27 Rear wheel fender 28 Operation tool 30 Fuel tank 22 Continuously variable transmission 8 Engine

Claims (5)

Place the mower between the front and rear wheels, a driving seat disposed above portions of the rear wheel in a side view, is provided with a protective frame having a pair of left and right strut mower,
A rear axle case for transmitting power to the rear wheel is disposed along the outer side of the pair of left and right body frames provided along the longitudinal direction of the body in the lateral direction of the body, and the axle of the rear axle case A support frame that supports the base end portion of the support column in the protective frame is disposed across the support location and the machine body frame on the front side of the aircraft from the axle support location,
The base end portion mounting position of the support column in the protective frame with respect to the support frame is positioned outside the rear axle case in the left-right direction in the front-rear direction, below the driver seat in the side view, and on the rear wheel together is located at the front end adjacent portion, is positioned on the axle of the same level or almost the same level of the rear wheel,
The column portion extends in a side view below the driver seat at the base end portion and obliquely rearward and upward from a position near the front end of the rear wheel and extends upward through a position near the backrest of the driver seat. Mowing machine. The mower according to claim 1 , wherein the strut portion is disposed in a state of wrapping around the left and right outer sides of the rear wheel fender with respect to the rear wheel. The mowing machine according to claim 1 or 2 , wherein the operation tool is disposed on the left and right inner sides of the support column so that the support column becomes a protector of the operation tool. The mowing machine according to any one of claims 1 to 3, wherein the fuel tank is disposed on the left and right inner sides of the support column so that the support column becomes a protector of the fuel tank. The front wheels are a pair of left and right caster wheels, and the rear wheels are a pair of left and right drive wheels driven independently by a pair of left and right hydrostatic continuously variable transmissions, The mower according to any one of claims 1 to 4 , wherein an engine is mounted at a rear portion of the rear wheel.

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