JP2008001125A - Assist bar of work vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a work vehicle wherein work efficiency and fuel economy are improved. <P>SOLUTION: The work vehicle is provided with a floor frame 21 formed on the vehicle body frame 10 of the rear part of a body, left/right fenders 12 which are both the left and right ends of the floor frame 21 and are formed on the upper surface of the floor frame 21, and a driver's seat 8 formed between the left and right fenders 12 and are formed on the floor frame 21. The lower parts 26a, 26b of the assist bars 26 are fixed to support members 22, 24, 25 fixed to the floor frame 21 through screw holes 12a, 12b formed in the fenders 12. The fenders 12' are formed to cover floor frame reinforcing members 28 having the assist bars 26' which are provided by bridging the front and rear of the floor frame 21 in accordance with the shape of the fenders 12' and are formed by making a midway part into a projected shape in an upward direction and allowing it protrude in a lateral direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a floor frame provided on a vehicle body frame at the rear of the fuselage, left and right ends of the floor frame, and left and right fenders provided on the top surface of the floor frame, between the left and right fenders. More particularly, the present invention relates to fixing a lower portion of an assist bar to a fender support member fixed to a floor frame through a hole provided in the fender.

As shown in FIG. 7, in a wheel type tractor as an example of a conventional work vehicle, a seat 32 is disposed above a transmission 31 provided at the center rear part of the vehicle body. A fender 34 is disposed so as to cover the front portion and the upper portion of the rear wheel 33, and a convex portion 35 is formed on the upper surface of the fender 34 so that an operator seated on the seat 32 can place an elbow. The guide hole 36 for inserting the middle part of the auxiliary transmission lever, the PTO transmission lever and the like is not provided in front of the fender 34, and a mudguard plate is interposed between the fender and the wheel. It is said that it is formed integrally, and the number of parts can be reduced. (Patent Document 1).
Further, since the upper part of the transmission case is shielded by a substantially plate member wider than the lateral width of the case and the end of the plate and the fender are connected, there are some which improve the support strength of the central part of the fender. (Patent Document 2).

Japanese Patent Laid-Open No. 2002-225752 JP 2000-313359 A

However, in such a tractor, for example, when an operator goes up and down, touches an assist bar such as an elbow rest provided on the upper surface of the fender and goes up to the driver's seat, or an operator sitting on the driver's seat When placing an elbow on the assist bar, the fender needs a certain level of load-bearing strength because the weight of the operator is applied to the assist bar. When used, there has been a problem that fuel consumption and assembly workability are reduced as the weight of the fuselage and the number of assembly parts increase.
SUMMARY OF THE INVENTION An object of the present invention is to provide a work vehicle having improved work efficiency and fuel efficiency.

  For this reason, the invention according to claim 1 is a floor frame provided on the body frame at the rear of the body, left and right ends of the floor frame, and left and right fenders provided on the upper surface of the floor frame, In a work vehicle between the left and right fenders and provided with a driver seat provided on the floor frame, a lower portion of the assist bar is attached to a support member fixed to the floor frame through a hole provided in the fender. It is fixed.

  According to a second aspect of the present invention, there is provided a floor frame provided on a vehicle body frame at a rear part of the body, left and right ends of the floor frame, left and right fenders provided on an upper surface of the floor frame, and the left and right fenders. In a work vehicle including a driver's seat provided on the floor frame, the front and back of the floor frame are bridged according to the shape of the fender, the middle part is convex upward, and the side The fender is covered with a floor frame reinforcing member having an assist bar that protrudes from the top.

  According to the first aspect of the present invention, the floor frame provided on the vehicle body frame at the rear part of the aircraft, the left and right fenders provided on the upper surface of the floor frame at the left and right ends of the floor frame, and the left and right fenders Since the lower part of the assist bar is fixed to the support member fixed to the floor frame through the hole provided in the fender in the work vehicle including the driver seat provided on the floor frame The bar can be firmly provided on the upper surface of the fender via the support member on the floor frame without being directly fixed on the fender, and at the same time, the strength of the floor frame can be enhanced by the support member. In addition, it can be stored compactly during parts transportation before assembly, improving workability. Accordingly, it is possible to provide a work vehicle with improved work efficiency and fuel consumption.

  According to the invention described in claim 2, the floor frame provided on the vehicle body frame at the rear of the body, the left and right fenders provided on the upper surface of the floor frame at the left and right ends of the floor frame, and the left and right fenders In a work vehicle equipped with a driver's seat provided on the floor frame, the front and back of the floor frame are bridged according to the shape of the fender, the middle part is convex upward and protrudes sideways Since the fender is placed on the floor frame reinforcement member having the assist bar, the assist bar is not fixed directly on the fender, but the assist bar is firmly fixed on the floor frame via the integrally formed floor frame reinforcement member. At the same time, the strength of the floor frame and the fender can be enhanced by the floor frame reinforcing member. Furthermore, the number of parts is reduced at the time of assembling and parts conveyance, and workability is improved. Accordingly, it is possible to provide a work vehicle with improved work efficiency and fuel consumption.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view of a wheel type tractor as an example of a work vehicle of the present invention, and FIG. 2 is a plan view thereof. The wheel-type tractor 1 of this example includes a front wheel 2 and a rear wheel 3, a bonnet 4 is formed on a vehicle body frame 10 above the front wheel 2, and an engine 5 serving as a prime mover portion is provided inside thereof. A driver's seat 8 is provided continuously at the rear of the bonnet 4, and a handle 6 is provided at the front and a seat 7 is provided at the rear of the driver's seat 8. Reference numeral 9 is a lifting step provided below the driver's seat 8, and reference numeral 11 is a lops frame provided at the rear of the fuselage.

  The seat 7 is disposed between the left and right fenders 12 provided above the rear wheel 3 and on both sides of the body and having an assist bar 26 on the top. The left and right fenders 12 include, for example, lower portions of various operation levers 13 such as an auxiliary transmission lever and a PTO lever, and upper portions of the operation levers 13 have long slots formed in the front-rear direction. A left / right operation lever guide 15 protruding from the lever groove 14 is provided.

  Next, the assist bar, which is a feature of the present invention, will be described. FIG. 3 is a left side view of the vicinity of the driver's seat showing the assist bar mounting structure, and FIG. 4 is a perspective view of the left side of the floor frame near the fender showing the assist bar mounting structure.

  The left and right floor frames 21 having a shape in which the rear portion is bent upward are fixed to the rear portion of the vehicle body frame 10 and serve as a seat 7 installation frame. Both ends of the support member 22 made of the same material as the floor frame 21 or the like are attached to the floor frame 21 by welding or the like so as to bridge forward and backward across the bent portion of the floor frame 21.

  On the inner side of the horizontal portion of the support member 22, there is a substantially L-shaped fender support member 23 that is long in the front and rear direction and has screw holes 23 a and 23 b in the horizontal plane, and on the outer side of the horizontal portion of the support member 22. The support members 24 provided so as to protrude upward and having screw holes 24a and the like on the upper horizontal surface are respectively attached by welding or the like. The fender support member 23 and the support member 24 are each made of a material such as iron.

  Further, a support member 25 made of a material such as a plate-like iron material and having a screw hole 25a is fixed on the upper surface of the rear end bent upward from the floor frame 21.

  The fender 12 is provided with a horizontal portion for bending and fixing the fender support member 23 on the inner side which is bent downward at the front and lower than the outer side. A plurality of screw holes (holes) 12a, 12b, 12c, 12d and the like for fixing the assist bar 26 and the fender 12 are appropriately provided on the outer side and the inner side. In addition, the fender 12 is comprised by blow molding, for example using a synthetic resin as a raw material.

  The assist bar 26 is made of a material such as iron, and has attachment portions 26a and 26b at a lower front end and a lower rear end. The assist bar 26 has a substantially gate shape in a side view long in the front-rear direction. As a boarding / alighting grip, the rear part can be used for placing an elbow of a worker who is seated.

  Here, when attaching the assist bar 26, first, the horizontal portion of the inner side of the fender 12 is loaded on the fender support member 23, and the rear portion of the fender 12 is loaded on the support member 25. Then, the screw holes 12c and 12d of the fender 12 are matched with the screw holes 23a and 23b of the fender support member 23 and fastened with bolts or the like, and the fender 12 is fixed. In addition, the front part and the rear part of the fender 12 are also appropriately fixed with bolts or the like.

  Next, the lower portions 26a and 26b, which are the attachment portions of the assist bar 26, are aligned with the screw holes 12a, 12b, 24a, and 25a of the fender 12, the support member 24, and the support member 25, respectively. The assist bar 26 is fixed to the upper surface of the fender 12 via the support member 22 via the support member 24 and the support member 25 on the floor frame 21.

  With this configuration, the assist bar 26 is not directly fixed on the fender 12, but firmly on the upper surface of the fender 12 via the support member 22 via the support member 24 and the support member 25 on the floor frame 21. At the same time, the strength of the floor frame 12 can be enhanced by the support member 22 or the like. Furthermore, it can be stored compactly during parts transportation before assembly, and workability is improved.

  As another embodiment different from the above, the assist bar 26 ′ may be formed integrally with the support member 22 and fixed on the floor frame 21. FIG. 5 is a left perspective view of the vicinity of the driver's seat to which the assist bar formed integrally with the floor frame reinforcing member is attached, and FIG. 6 is a left side view when the fender is attached to the assist bar formed integrally with the floor frame reinforcing member. The figure is shown.

  In this case, for example, a pipe-like floor frame reinforcing member 28 made of a material such as iron has a front portion bent downward in accordance with the shape of the fender 12 ', and a midway portion is convex upward and protrudes sideways. The assist bar 26 ′ is formed integrally with the floor frame reinforcing member 28.

  Further, a cutout 29 that does not hinder the protrusion of the assist bar 26 ′ is provided at the outer end of the midway where the assist bar 26 ′ of the fender 12 ′ is located.

  A support member provided by welding or the like on the upper surface of the rear end where the front end of the floor frame reinforcing member 28 is bent to the front of the floor frame 21 and the rear end of the floor frame reinforcing member 28 is bent above the rear of the floor frame 21. A floor frame reinforcing member 28 is attached to 30 so as to be fixed to each other by welding or the like and bridged to the floor frame 21. Next, the fender 12 ′ is covered on the floor frame reinforcing member 28. At this time, the middle part of the fender 12 ′ is fastened with a bolt 31 or the like via a stay (not shown) attached to the floor frame reinforcing member 28, the support member 30, etc., and the fender 12 ′ is fixed to the floor frame reinforcing member 28. Or may be fixed to the support member 30 or the like.

  With this configuration, the assist bar 26 ′ is not directly fixed on the fender 12 ′, but can be firmly provided on the floor frame 21 via the floor frame reinforcing member 28 integrally formed with the assist bar 26 ′. At the same time, the strength of the floor frame 21 and the fender 12 ′ can be enhanced by the floor frame reinforcing member 28. Furthermore, the number of parts is reduced during assembling and parts conveyance, and workability is improved.

  The assist bars 26 and 26 ′ are not limited to being provided in both the left and right fenders 12 and 12 ′, and may be provided in any one of the left and right fenders 12 and 12 ′.

  As described in detail above, the tractor 1 of this example is provided on the upper surface of the floor frame 21 at the rear frame, the floor frame 21 provided on the body frame 10, and the left and right ends of the floor frame 21. The left and right fenders 12 and the driver's seat 8 provided between the left and right fenders 12 and on the floor frame 21 are provided, and the floor frame 21 is provided via screw holes 12a and 12b (holes) provided in the fender 12. The lower members 26a, 26b of the assist bar 26 are fixed to the support members 22, 24, 25 fixed to the base plate. In addition, a floor frame reinforcing member 28 having an assist bar 26 ′ provided by bridging the front and back of the floor frame 21 in accordance with the shape of the fender 12 ′ and having a midway portion projecting upward and projecting sideways is provided. The fender 12 'is covered.

  In the above example, the wheel type tractor has been described as an example of the work vehicle. However, the present invention is not limited to this, and in addition to the crawler type tractor, the construction work machine includes a power shovel, a bull tosa, and a fender. It can be applied to any work vehicle having an assist bar on the top.

It is a side view of the wheel type tractor as an example of the work vehicle of the present invention. It is a top view of the wheel type tractor as an example of the work vehicle of the present invention. It is a left view of the driver's seat vicinity which shows the attachment structure of an assist bar. It is the perspective view of the left side surface in the floor frame vicinity which excluded the fender which shows the attachment structure of an assist bar. It is a left perspective view of the driver's seat vicinity which attached the assist bar shape | molded integrally with the floor frame reinforcement member. It is a left view when attaching a fender to the assist bar integrally molded with the floor frame reinforcing member. It is a front schematic diagram near the driver's seat of the conventional wheel type tractor.

Explanation of symbols

1 Tractor 12, 12 'Fender 12a, 12b, 12c, 12d, 23a, 23b, 24a, 25a Screw hole 21 Floor frame 22, 24, 25, 30 Support member 23 Fender support member 26, 26' Assist bar 26a, 26b Lower part 27, 31 Bolt 28 Floor frame reinforcement 29 Notched

Claims (2)

A floor frame on the body frame at the rear of the aircraft,
Left and right ends of the floor frame, left and right fenders provided on the top surface of the floor frame,
A driver's seat provided between the left and right fenders on the floor frame;
In a work vehicle comprising:
A work vehicle in which a lower portion of an assist bar is fixed to a support member fixed to the floor frame through a hole provided in the fender. A floor frame on the body frame at the rear of the aircraft,
Left and right ends of the floor frame, left and right fenders provided on the top surface of the floor frame,
A driver's seat provided between the left and right fenders on the floor frame;
In a work vehicle comprising:
The fender is covered with a floor frame reinforcing member having an assist bar formed by bridging the front and rear of the floor frame in accordance with the shape of the fender, and having a midway portion protruding upward and projecting sideways. A working vehicle characterized by that.

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