JP4104153B2 - Work vehicle - Google Patents

Description

  The present invention relates to a work vehicle.

JP 2001-180536 A

[I]
(Constitution)
A first feature of the present invention is a work vehicle including a vehicle body main frame supported by left and right front wheels and left and right rear wheels , and having a driving unit between the front wheels and the rear wheels .
A main frame configured in a frame shape is provided above the front wheel, and a suspension support frame of a press-formed sheet metal member is connected to the main frame so as to be located on the inner side of the vehicle body than the main frame, and the front wheel suspension Connecting the upper end side of the suspension to the suspension support frame,
By connecting the front and rear frames fixed to the vehicle body main frame to the rear part of the main frame, and connecting the support frame across the front lateral part of the main frame and the upper part of the front and rear frames, the driving unit The support body which supports the lower end side of the fall protection frame provided in the front part side of is constructed .

[II]
(Constitution)
The second feature of the present invention is that the work vehicle of the first feature of the present invention is configured as follows.
The front horizontal portion of the main frame is configured to be inclined in the middle of the diagonal vehicle body and the diagonally outer rear.

[III]
(Constitution)
The third feature of the present invention is that the work vehicle according to the first or second feature of the present invention is configured as follows.
Left and right vehicle body main frames are provided below the main frame and the suspension support frame. The distance between the left and right vehicle body main frames located below the main frame and the suspension support frame is configured to be narrower than the distance between the rear portions of the left and right vehicle body main frames.

As shown in FIGS. 1, 2, and 3, a pair of left and right steerable tire front wheels 1 and a pair of left and right tire rear wheels 2 are provided, and an engine 3 that drives the front and rear wheels 1 and 2 is mounted between the front and rear wheels. A driving unit 7 having a seat 5 and an awning 6 is provided at the front of the body frame 4, and a loading cylinder 8 is arranged at the rear of the body frame 4 by a dump cylinder 9 around a lateral axis of the vehicle body located at the rear of the loading platform. The work vehicle is configured so as to be swingable.

The vehicle body frame 4 is configured as shown in FIG. 4, FIG. 5, FIG.
That is, the vehicle body main frame 11 made of a pair of left and right square steel pipe members, the front connection frame 12 connecting the front end portions of the pair of left and right vehicle body main frames 11, and the intermediate portions of the pair of left and right vehicle body main frames 11 are connected. The middle connecting frame 13, the rear connecting frame 14 connecting the rear end portions of the pair of left and right vehicle body main frames 11, and the front side portion 11 a of each of the pair of left and right vehicle body main frames 11 are positioned at a higher level. Rear part 11
engine mounting frame 15 connected over the front end side of b, a pair of left and right transmission mounting frames 15a connected over the engine mounting frame 15 and the rear connection frame 14, and the rear side portion of the pair of left and right vehicle body main frames 11 A support frame 16 that also serves as a connecting frame that connects the front ends of 11b, and a pair of left and right vehicle bodies that are positioned separately on both laterally outward sides of the rear side portion 11b of the pair of left and right vehicle body main frames 11. A driving unit frame 20 having a vertical frame 21, a fender support frame 30 that is also used as a frame that connects the front end side of the driving unit frame 20 to the front side portion 11 a of the pair of left and right vehicle body main frames 11, and the driving unit frame. A front end portion 11a of the pair of left and right vehicle body main frames 11 is arranged on the front end side of the vehicle 20. Separately in connection to which a pair of left and right connection frames 18, it is constructed provided with such suspension support frame 40 provided at both lateral end portions of the fender support frame 30.

The support frame 16 is formed of a round steel pipe formed in a bent shape in which both end sides are oriented in the longitudinal direction of the vehicle body and the intermediate portion is laterally directed in the vehicle body, and the front end portions of the rear side portions 11b of the pair of left and right vehicle body main frames 11 And a laterally extending portion 16a extending in the lateral direction of the vehicle body, and a longitudinally facing portion 16b extending from both ends of the laterally facing portion 16a toward the rear of the vehicle body. The support frame 16 is supported on the vehicle body main frame 11 in an arrangement located at an arrangement level higher than the floor 50 of the driving unit 7.

The driving unit frame 20 is an extension of a support rod 51 made of a round steel pipe material that extends from the rear side portion 11b of the vehicle body main frame 11 toward the vehicle body lateral outer side on both lateral outer sides of the pair of left and right vehicle body main frames 11. An intermediate portion is connected to the projecting end portion and the rear end portion of the front-rear facing portion 16b of the support frame 16, and an extension of the support rod 52 extending from the lateral end portion of the engine mounting frame 15 toward the lateral outer side of the vehicle body. A vertical frame 21 made of a round steel pipe having a lower end connected to the leading end, a rear horizontal frame 22 made of a round steel pipe facing the vehicle body connected across the upper ends of the pair of left and right vertical frames 21, A vertical frame 21 on both lateral outer sides of the pair of vehicle body main frames 11.
A front and rear frame 23 made of a round steel pipe facing the vehicle body, the rear end of which is connected to the lower end of the vehicle, and a front made of a round steel pipe facing the vehicle body connected across the front ends of the pair of left and right front and rear frames 23. A horizontal frame 24 is connected to the front end sides of the pair of left and right front and rear frames 23 and is connected to a pair of left and right connection frames 18 and includes a connection frame 25 made of a horizontal steel pipe facing the vehicle body. Each of the pair of left and right front and rear frames 23 includes a floor frame portion 23a having a rear end portion connected to the vertical frame 21 and extending substantially horizontally in the vehicle body front and rear direction, and a front end portion of the floor frame portion 23a. A front wall frame portion 23b that extends in a state where the upper end side is located on the front side of the vehicle body and has a forwardly inclined posture is formed in the upward direction of the vehicle body.

That is, the driving unit frame 20 forms a driver's cab with a pair of left and right vertical frames 21, a rear horizontal frame 22, a pair of left and right front and rear frames 23, and a front horizontal frame 24. And the driving | operation part floor | bed 50 is formed with the floor board 50a attached over this right-and-left floor frame part 23a.

The fender support frame 30 is made of a round steel pipe formed into a bent shape with both end sides facing the front and rear of the vehicle body and the middle portion being lateral to the vehicle body, and both ends are respectively connected to the pair of left and right front wall frame portions 23b of the driving unit frame 20. A separately connected main frame 31, a pair of left and right connecting frames 32 connecting the front end of the main frame 31 to a pair of left and right vehicle body main frames 11, a vehicle body front-rear facing portion of the main frame 31 and driving It comprises a pair of left and right vehicle body front-rear support frames 33 that are connected to the front horizontal frame 24 of the front frame 20 and are inclined forward and downward, and the left and right front wheels 1 are supported by the main frame 31 and the support frame 33.
The fender 53 is supported.

Each of the pair of left and right suspension support frames 40 is constituted by a single sheet metal member press-molded as shown in FIGS. That is, a sheet metal that is press-molded so as to include a connecting portion 41 to which the upper end side of the front wheel suspension 54 is connected and a plurality of rib portions 42 that extend radially from the connecting portion 41 so as to protrude to the upper surface side of the suspension support frame 40. It is comprised by the member.

As shown in FIG. 1, FIG. 2, etc., it arrange | positions so that it may be located in the lateral outer side of the seat 5 on both sides of the driving | running | working part 7, and it is comprised so that it can support by hand at the time of getting on / off to the driving | running | working part 7 A handrail 55 for getting on and off is provided.
As shown in FIG. 5 and the like, the handrail 55 is formed of a round steel pipe bent and formed so that one end side is in the longitudinal direction of the vehicle body and the other end side is in the vertical direction of the vehicle body, and the support frame 16 of the vertical frame 21 is It fixes by connecting over the site | part located in a high level rather than the site | part connected, and the site | part located in the vehicle body front side rather than the vertical frame 21 of the vehicle body front-back direction part 16b of the support frame 16. FIG.

As shown in FIGS. 1 and 2, the sunshade 6 is attached across the beam portions 57 a and 58 a facing the vehicle body of the pair of front and rear fall protection frames 57 and 58.

As shown in FIG. 6 and the like, each of the pair of front and rear fall protection frames 57 and 58 has leg portions 57b and 58b that are vertically oriented at the both ends, and beam portions 57a and 58a that are laterally directed at the middle portion.
That is, a round steel pipe formed in a bent shape so as to form a gate shape when viewed from the front and rear of the vehicle body, and the front-side fall protection frame 57 has a lower end portion of both legs 57b at the operating portion frame. 20 is attached to the pair of left and right supports 61 provided at the upper end of the front end side so as to be detachable, and the rear fall protection frame 58 has the lower ends of both legs 58b. The operation unit frame 20 is detachably attached to the support 62 provided at the upper end of the pair of left and right vertical frames 21 by being detachably connected to each other. That is, both the front-side fall protection frame 57 and the rear-side fall protection frame 58 are detachably provided so that an operation cabin (not shown) can be provided instead.

As shown in FIG. 8, each of the pair of left and right supports 61 positioned on the front end side of the driving unit frame 20 is disposed in a state of protruding upward from the front wheel fender 53 through the through hole 53 a of the front wheel fender 53. That is, the rubber cover 63 that covers the connecting portion of the fall protection frame 57.
By removing the front fender 53, the front fender 53 can be removed without taking the trouble of removing the front fender 53.
The fall protection frame 57 can be attached / detached above.

As shown in FIG. 9, an air cleaner 70 that removes dust from engine combustion air is installed near the rear side of the driving unit 7 on the side of the vehicle body.
As shown in FIGS. 9 and 10, an intake duct 72 in which the intake pipe 71 of the air cleaner 70 communicates with the lower end side is provided inside the lateral outer cover 73 located laterally outside the seat 5 of the operating unit 7. In addition, a plurality of intake holes 7 facing the intake ports 72a located on the upper end side of the intake duct 72 are also provided.
4 is provided on the lateral outer cover 73. That is, the air cleaner 70 sucks air into the intake duct 72 from the intake hole 74 of the lateral outer cover 73, sucks the air through the intake pipe 71 through the intake duct 72, filters the air, and then supplies the combustion air to the engine 3. To supply as.

As shown in FIG. 1, the operating unit 7 is provided with a shielding cover 75.
As shown in FIG. 11, the shielding cover 75 includes a main cover portion 75 a that shields below the seat cushion portion of the seat 5, and extends from the rear portion of the main cover portion 75 a upward in the vehicle body to the seat back of the seat 5. A rear cover part 75b that shields behind the front part, a front cover part 75c that extends downward from the front part of the main cover part 75a and shields at the foot, and a main cover part 75a on both sides of the main cover part 75a And a horizontal cover portion 75d connected across the rear cover portion 75b. The engine 3 and the engine cooling radiator 76 shown in FIG. It is designed to prevent inflow into the cab. In addition, a lateral outer cover 73 formed as a separate part from the shielding cover 75 is detachably connected to one lateral side portion of the shielding cover 75, and is separated from the shielding cover 75 on the other lateral side portion. A lateral outer cover 77 formed on the part is detachably connected. The lateral outer covers 73 and 77 and the shielding cover 75 sandwich the base portion of the handrail 55 and the base portion of the leg portion 58b of the rear fall protection frame 58.

Perspective view of the entire work vehicle Side view of the entire work vehicle Side view inside the car body Side view of body frame Perspective view of the entire body frame Front view of body frame, perspective view of fall protection frame Cross section of front wheel suspension support structure Side view of the front fall protection frame mounting part Side view of the driving unit Rear view of the air cleaner installation section Perspective view of shielding cover and side cover

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front wheel 2 Rear wheel 11 Car body main frame 23 Front-rear frame 31 Main frame 33 Support frame 40 Suspension support frame 54 Front wheel suspension

Claims (3)

Work including a vehicle body main frame (11) supported by the left and right front wheels (1) and the left and right rear wheels (2) , and a driving section (7) provided between the front wheels (1) and the rear wheels (2). A car,
A main frame (31) configured in a frame shape is provided above the front wheel (1), and the suspension support frame (40) of the press-formed sheet metal member is located on the vehicle body inner side than the main frame (31). Connected to the main frame (31), and the upper end side of the front wheel suspension (54) is connected to the suspension support frame (40),
A front and rear frame (23) fixed to the vehicle body main frame (11) is connected to a rear portion of the main frame (31), and a front horizontal portion of the main frame (31) and an upper portion of the front and rear frame (23) are connected. By connecting the support frame (33) over and above, the support body (61) for supporting the lower end side of the overturn protection frame (57) provided on the front side of the operating section (7) is configured. A work vehicle characterized by   The work vehicle according to claim 1, wherein a front horizontal portion of the main frame (31) is configured to be inclined in a diagonal direction extending from the front of the diagonal vehicle body to the diagonally outer rear. On the lower side of the main frame (31) and the suspension support frame (40), left and right vehicle body main frames (11) are provided,
The distance between the left and right vehicle body main frames (11) located below the main frame (31) and the suspension support frame (40) is configured to be narrower than the distance between the rear portions of the left and right vehicle body main frames (11). The work vehicle according to claim 1 or 2 .

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