JP2006193062A - Wheel loader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wheel loader capable of attaching and detaching a rear fender covering a rear wheel with a cab mounted on a machine body frame. <P>SOLUTION: A front cab mount seat 17 and a rear cab mount seat 18L in which the cab is attached and supported are secured onto side frames 22L, 22R, and the cab 11 is attached onto the cab mount seats 17, 18L, 18R. Under this condition, the rear fenders 27L, 27R covering the rear wheel are detachably attached onto the side frames 22L, 22R from outward of the cab mount seats 17, 18L, 18R. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention belongs to the technical field of wheel loaders that perform loading work and snow removal work.

In general, this type of wheel loader includes a front wheel and a rear wheel as a traveling device, and a fender that covers these front and rear wheels. Incidentally, some wheel loaders include, for example, a small model having a body weight of about 2 to 3 tons. However, even in such a small wheel loader, in order to improve the operator's working environment, the driver's seat portion is cabbed. May be required to cover. However, since the small size does not have enough space, it is difficult to secure a mounting space for mounting the cab to the body frame.
Therefore, conventionally, a technique is known in which a rear support is provided in a rear fender that covers a rear wheel, and a lower end portion of a rear support frame of a cab is fastened to the rear support through a rear fender (for example, a patent) Reference 1).
Japanese Patent Laid-Open No. 7-3842

  However, since the rear support frame of the cab is supported through the rear fender in the above-described conventional one, if the rear fender is damaged or damaged, the rear fender must be replaced unless the cab is removed. There is a problem that the rear fender replacement work is troublesome and inferior in workability, and there is a problem to be solved by the present invention.

The present invention was created with the object of solving these problems in view of the above circumstances, and the invention of claim 1 fixes a cab mounting seat on which a cab is mounted and supported to a fuselage frame. On the other hand, with the cab attached to the cab mounting seat, the rear fender that covers the rear wheel is detachably secured to the body frame from the outside of the cab mounting seat.
In this way, if the rear fender is damaged or damaged, the rear fender can be replaced with the cab still attached to the cab mounting seat, facilitating the replacement work. Excellent workability.
According to a second aspect of the present invention, in the first aspect of the present invention, the left and right outer ends of the cab mounting seat are provided with a fender mounting portion on which the upper surface of the rear fender is detachably fixed.
In this way, when the rear fender is attached, the rear fender is first supported by the fender mounting plate in a positioned state by fixing the upper surface of the rear fender to the fender mounting plate. Thus, the subsequent mounting work becomes easy, which can contribute to further improvement of workability.
The invention of claim 3 is characterized in that, in claim 1 or 2, the cab mounting seat is fixed to the body frame in a state where it is reinforced by a reinforcing member.
By doing so, the cab is firmly attached to the body frame side, and the cab can be effectively protected even in an emergency such as a fall.
According to a fourth aspect of the present invention, in the cab mounting seat according to any one of the first to third aspects, the front cab mounting seat on which the front column of the cab is mounted and supported, and the rear column of the cab are mounted and supported. The cab floor is placed on the upper surface side of the front cab mounting seat.
In this manner, the front cab mounting seat also serves as a support member that supports the cab floor, and the cab floor can be assembled to the body frame in a state where the strength is increased.

  Next, embodiments of the present invention will be described with reference to the drawings. In the drawings, 1 is a wheel loader, and the wheel loader 1 can swing left and right between a rear vehicle 1A provided with a rear wheel 2 and a front vehicle 1B provided with a front wheel 3 via a connecting portion 1C. It is connected and configured. The rear vehicle 1A includes an engine room 4 in which a mechanical device such as an engine (not shown) is accommodated, a driver seat portion in which an operator seat 5 and a steering wheel 6 are arranged, a counterweight 7, While various members such as a fuel tank and a hydraulic oil tank are provided, the front vehicle 1B has the same basic structure as that of the related art, such as a work device 10 including a bucket 8 and an arm 9 being mounted. is there.

  Reference numeral 11 denotes a cab that covers the driver seat, and the cab 11 includes a front glass 14 provided between left and right front columns 12L and 12R, left and right rear columns 13L and 13R, and left and right front columns 12L and 12R. The rear glass 15 provided between the left and right rear columns 13L, 13R, the door 16 provided between the front columns 12L, 12R and the rear columns 13L, 13R, and the like are configured, but the left and right front columns 12L, 12R and left and right rear struts 13L, 13R have mounting bases 19L, 19R, 20L, 20R mounted and supported on front cab mounting seat 17 and left and right rear cab mounting seats 18L, 18R, which will be described later, respectively. It is fixed.

  On the other hand, reference numeral 21 denotes a body frame that serves as a base for the rear vehicle 1A. The body frame 21 is supported between a pair of left and right side frames 22L and 22R facing in the front-rear direction, and the left and right side frames 22L and 22R. The upper and lower support frames 24A and 24B to which the connecting portion 1C is attached and supported are supported between the front end portions of the left and right side frames 22L and 22R.

  Further, the front cab mounting seat 17 and the left and right rear cab mounting seats 18L, 18R are engaged with the upper ends of the front portions of the left and right side frames 22L, 22R and the middle portion in the front-rear direction, and the concave portions 22La, 22Ra, 22Lb, 22Rb is formed.

  The front cab mounting seat 17 is designed to have a left-right width substantially equal to the left-right width of the cab 11, but its left and right ends project from the left and right side frames 22L, 22R to the left and right outwards, and the upper surface portion is the side frame 22L. , 22R are engaged with and fixed to the recesses 22La, 22Ra of the left and right side frames 22L, 22R in a state of being substantially flush with the upper ends of 22R. Further, the fixing of the front cab mounting seat 17 to the side frames 22L and 22R is reinforced by a reinforcing plate 25a supported between the lower surface of the front cab mounting seat 17 and the left and right outer surfaces of the side frames 22L and 22R. . The left and right mounting seats on which the left and right front struts 12L, 12R of the cab 11 are mounted on the left and right sides of the upper surface of the front cab mounting seat 17 and the bolts 26a are fastened. 17La and 17Ra are formed.

  Further, the rear cab mounting seats 18L and 18R are divided into left and right, and the upper surface portions thereof are substantially flush with the upper ends of the side frames 22L and 22R, and the concave portions 22Lb of the left and right side frames 22L and 22R, Each of them is fixedly engaged with 22Rb. Furthermore, the rear cab mounting seats 18L and 18R are fixed to the side frames 22L and 22R by reinforcing the rear cab mounting seats 18L and 18R between the lower surface of the rear cab mounting seats 18L and 18R and the left and right outer surfaces of the side frames 22L and 22R. Reinforced by the reinforcing pillars 25c erected on the left and right inner sides of the plate 25b and the side frames 22L and 22R. Then, on the upper surfaces of the left and right rear cab mounting seats 18L and 18R, the mounting bases 18L and 20R at the lower ends of the left and right rear columns 13L and 13R of the cab 11 are mounted and the mounting seat surfaces 18La to which the bolts 26b are fastened. , 18Ra are formed.

  Further, left and right fender mounting plates 28L and 28R to which left and right rear fenders 27L and 27R described later are mounted at left and right outer ends of the left and right rear cab mounting seats 18L and 18R, respectively. It is fixed in a state of protruding outward from the left and right from 18L and 18R.

  On the other hand, 29 is a cab floor that forms the floor surface of the cab 11, and the cab floor 29 is placed on the upper surface of the front cab mounting seat 17 and the rear side is a left and right side frame 22L, The machine body is secured to the front cab mounting seat 17 and the floor mounting angles 30L, 30R by bolts 31 while being placed on the upper surfaces of the left and right floor mounting angles 30L, 30R fixed to the upper end of 22R. Although the cab floor 29 is assembled, the front end portion of the cab floor 29 is located slightly forward of the front end position of the front cab mounting seat 17 and the rear end portion of the cab floor 29 is assembled. The rear cab mounting seats 18L and 18R are designed to substantially abut on the front end portions.

  Further, the cab floor 29 has notches 29La and 29Ra formed in portions above the left and right mounting seat surfaces 17La and 17Ra of the front cab mounting seat 17, and the left and right mounting seats are formed from the notches 29La and 29Ra. The surfaces 17La and 17Ra are exposed. Thus, the cab 11 mounts the mounting bases 19L and 19R at the lower ends of the front struts 12L and 12R on the mounting seat surfaces 17La and 17Ra of the front cab mounting seat 17 with the cab floor 29 assembled to the body frame 21. Then, the bolts 26a are fixed, and the mounting bases 20L and 20R at the lower ends of the rear columns 13L and 13R are placed on the mounting seat surfaces 18La and 18Ra of the rear cab mounting seats 18R and 18L, and the bolts 26b are fixed. It is configured to be mounted and supported on the body frame 21.

  On the other hand, the left and right rear fenders 27L and 27R cover the upper and front and rear sides of the left and right rear wheels 2 and 2 and are substantially flush with the upper surface of the cab floor 29 up to the counterweight 7. Upper surface portions 27La, 27Ra, left and right inner side surface portions 27Lb, 27Rb bent from the left and right inner ends of the upper surface portions 27La, 27Ra and applied to the left and right outer surface portions of the left and right side frames 22L, 22R, and the upper surface portion 27La 27Ra, 27Rc and 27Rc, which are bent from the left and right outer ends of 27Ra and have a substantially semicircular arc inner periphery. The left and right rear fenders 27L, 27R have their upper surface portions 27La, 27Ra bolted to the left and right fender mounting plates 28L, 28R fixed to the left and right rear cab mounting seats 18L, 18R with bolts 32, By fixing the inner side surface portions 27Lb and 27Rb to the left and right outer surface portions of the left and right side frames 22L and 22R, the rear cab mounting seats 18L and 18R can be detachably fixed from the outer side. Thus, the front columns 12L and 12R and the rear columns 13L and 13R of the cab 11 are mounted and supported on the front cab mounting seat 17 and the rear cab mounting seats 18L and 18R, that is, the cab 11 is mounted on the body frame. The rear fenders 27 </ b> L and 27 </ b> R can be attached and detached while attached to 21.

In the present embodiment configured as described, the cab 11 includes a front cab mounting seat 17 and a rear cab mounting seat 18L, whose front columns 12L and 12R and rear columns 13L and 13R are fixed to the side frames 22L and 22R. The rear fenders 27L and 27R that cover the left and right rear wheels 2 and 2 are mounted and supported on the left and right rear wheels 2 and 2, with the cab 11 being mounted on the front cab mounting seat 17 and the rear cab mounting seats 18L and 18R. The rear cab mounting seats 18L and 18R are detachably attached to the side frames 22L and 22R from the left and right outer sides.
As a result, when the rear fenders 27L and 27R are damaged or broken, the rear fenders 27L and 27R can be replaced while the cab 11 is still attached to the fuselage frame 21. Easy and excellent workability.

  Further, in this case, fender mounting plates 28L and 28R to which the upper surface portions 27La and 27Ra of the rear fenders 27L and 27R are detachably fixed are provided on the left and right outer ends of the rear cab mounting seats 18L and 18R. When attaching the rear fenders 27L and 27R, first, the rear fender upper surfaces 27La and 27Ra are bolted to the fender mounting plates 28L and 28R by bolts 32, so that the rear fenders 27L and 28R are positioned and the fender mounting plate 28L is positioned. , 28R, and the subsequent bolt 33 fixing operation becomes easy, which can contribute to further improvement of workability.

Further, in this case, the cab mounting seat on which the cab 11 is mounted and supported includes the front cab mounting seat 17 on which the left and right front columns 12L and 12R of the cab 11 are mounted and supported, and the left and right rear columns 13L and 13R, respectively. The left and right rear cab mounting seats 18 </ b> L and 18 </ b> R are supported, and the cab floor 29 is placed on the upper surface side of the front cab mounting seat 17. Thus, the front cab mounting seat 17 also serves as a support member for supporting the cab floor 29, and the cab floor 29 is assembled to the body frame 21 in a state where the strength is increased.
Further, the front cab mounting seat 17 and the rear cab mounting seats 18L and 18R are fixed to the side frames 22L and 22R in a state where they are reinforced by the reinforcing plates 25a and 25b and the reinforcing columns 25c. The attachment to the body frame 21 side becomes strong, and the cab 11 can be effectively protected even in an emergency such as a fall.

It is a side view of a wheel loader. FIG. 2 is a horizontal sectional view of the cab taken along the line XX in FIG. 1. (X) is an end view taken along line XX in FIG. 2, and (Y) is a view taken in the direction of arrows YY in FIG. It is a side view of a body frame. It is a top view of a body frame. It is XX sectional drawing of FIG. It is a side view which shows the state which assembled | attached the cab floor and the rear fender to the body frame. It is a top view which shows the state which assembled | attached the cab floor and the rear fender to the body frame.

Explanation of symbols

1 Wheel loader 2 Rear wheel 11 Cab 17 Front cab mounting seat 18L, 18R Rear cab mounting seat 21 Airframe frame 22L, 22R Side frame 25a, 25b Reinforcement plate 25c Reinforcement support 27L, 27R Rear fender 28L, 28R Fender mounting plate 29 Cab floor

Claims (4)

  While the cab mounting seat on which the cab is mounted and supported is fixed to the fuselage frame, the rear fender that covers the rear wheel can be attached to and detached from the fuselage frame from the outside of the cab mounting seat while the cab is mounted on the cab mounting seat. A wheel loader characterized by being fixed to   2. The wheel loader according to claim 1, wherein a fender mounting portion to which an upper surface portion of the rear fender is detachably fixed is provided at the left and right outer ends of the cab mounting seat.   3. The wheel loader according to claim 1, wherein the cab mounting seat is fixed to the body frame while being reinforced by a reinforcing member.   The cab mounting seat according to any one of claims 1 to 3, wherein the cab mounting seat includes a front cab mounting seat on which the front column of the cab is mounted and supported, and a rear cab mounting seat on which the rear column of the cab is mounted and supported. And a cab floor is placed on the upper surface side of the front cab mounting seat.

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