JPS6234828A - Body mounting device for dump truck - Google Patents

Abstract

PURPOSE:To decrease not only a bending moment and a torsional torque, but also a relative displacement between the frame and a body by allowing the body to be supported only by the rear end of the frame but also by a right and a left shoulder of a front frame which is located just above front wheel suspension. CONSTITUTION:Front wheel suspensions are supported by both sides of a front frame 2 in a gate form, and the rear portion of the body 10 is rotatably supported by the rear end of the frame 1. In this structural configuration, bearers 8a and 8b, each surface of which is inclined synmetrically about the vertical center line, are provided for both shoulders of the frame 2 in a gate form, and each of the shoulders lies approximately on a line vertically extended from the suspension support section. On the other hand, a right and a left bracket 13a and 13b which come in contact with the above said bearers 8a and 8b, are provided on the outside of a front wall 12 of the body 10. And shock absorbing members 9 are stuck on the contact surface of at least either the bearers or the brackets. This structural configuration enables both a bending moment and a torsional torque which act on the frame 1, to be decreased, and also enables a relative displacement between the frame 1 and the body 10 to be decreased as well.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a body mounting device for a dump truck.

2. Description of the Related Art Conventional dump truck body mount devices are shown in FIGS. 4 to 7.

The rear bottom of body a is supported by the rear end of frame b via a hinge pin C so that it can rotate freely in the vertical direction.
The front bottom of the frame b was supported at a longitudinally intermediate portion of the frame b at a plurality of locations via cushioning materials d.

Also, as shown in Figure 6, the front wheel cart has a front frame constructed into a gate shape via a suspension cylinder and a connecting pin f! It was supposed to be supported by the government.

Problems to be Solved by the Invention As shown in FIG. 7, the conventional body mount device has a large bending moment M in the left and right direction on the left and right members hI+G at the intermediate portion of the frame b in response to the body load P. However, a large torsional torque T is also generated in the front frame l.

Therefore, the middle part b/ of the left and right members bI+G of frame b
,,h1. This requires a strength capable of withstanding the above-mentioned bending moment and torsional torque, and there is a problem in that the weight of the frame b becomes large.

Also, body a is supported at the middle part of frame b, and this support point and the front wheel support point of frame a are separated from each other in the front-rear direction.
As the relative displacement of the vehicle increases, the driver's cab mounted on the front end of frame b becomes more shaken when driving on uneven roads.
Ride comfort was poor.

Means and Effects for Solving the Problems The present invention was conceived in view of the above-mentioned problems, and it is possible to reduce the bending moment and torsional moment generated at the middle part of the frame, and to lower the strength of the middle part of the frame. The dump truck's frame is lighter in weight, and the amount of relative displacement between the front part of the frame and the body can be reduced when driving on uneven roads, reducing shaking in the driver's cab and improving ride comfort. Body mount equipment.

The structure is such that symmetrically inclined receiving parts are provided on both the left and right shoulders of the front frame and approximately above the extension of the support part of the suspension on the front wheel side. Left and right brackets are provided on the outer surface of the front wall of the body and have contact surfaces that come into contact with the receiving portions of the front frame, and a cushioning material is fixed to at least 10,000 of the contact surfaces of the receiving portions and the brackets. The body in the lowered state is supported by both shoulders of the front frame and approximately above the extension line of the front wheel suspension.

Embodiment An embodiment of the present invention will be described based on FIGS. 1 to 3.

In the figure, 1 is a frame, 2 is a front frame erected in a gate shape at the front of the frame 1, 3 and 4 are front and rear wheels, and the front wheel 3 is attached to the front of the gate shape via a suspension 5. The rear wheel 4 is supported by platens 2a and 2b protruding from both sides of the frame 2, and the rear wheel 4 is supported by a suspension 6 at the rear end of the frame 1.
Supported through. 7 is a driver's cab mounted on the front part of the frame 1.

At both left and right shoulder portions of the front frame 2, there are receiving portions 8α that are symmetrically inclined outward.

8b is provided, and cushioning materials 9, 9 such as rubber plates are fixed to both receiving portions 8''+8b.
a and 8b are located on the axial extension line of the front suspension 5.

Reference numeral 10 denotes a body, and the rear bottom portion of the body 10 is pivotally supported by a hinge pin 11 as in the conventional example. Further, on the outer surface of the front wall 12 of the body 10, there are platens 3a, 13.
6 are provided respectively, and these two brackets 13a, 1
3b is formed with an abutment surface that is symmetrically inclined inward along the inclination of the receiving portion f(a, 8h).

In the above configuration, the body 10 is raised and lowered using the hinge pin 11 as a fulcrum using a hoist ring (not shown). In the lowered state, the left and right brackets +34 provided on the outside of the front wall 12 of the body 10. The contact surface of I3b contacts the receiving portion 8Q of the front frame 2 and the cushioning materials 9, 9 of 3b, so that the amount M of the body 10 is received by both shoulders of the front frame 2. At this time, the body 10 is supported in a stable state in the left-right direction while being adjusted in the left-right direction because the left and right contact surfaces are symmetrical.

Further, at this time, the support point of the body 10 on the front frame 2 is located at a position that is substantially separated from the line of action of the front suspension 5.

Effects of the Invention According to the present invention, the weight of the body 10 is supported by the rear end of the frame 1, the left and right shoulders of the front frame 2, and above the suspension 5 on the front wheel side. The bending moment and torsional torque generated in the middle part of frame 1 are reduced compared to conventional dump trucks.
The strength of the intermediate portion of the frame 1 can be reduced, and the weight of this portion can be reduced, and the weight of the entire frame 1 can be reduced. Furthermore, since the body 10 is supported on the front frame 2 located on the front side of the frame 1, the amount of relative displacement between the front part of the frame 1 and the body when driving on an uneven road is reduced, and the front part of the frame 1 The vibration of the driver's cab installed in the vehicle is reduced, improving ride comfort.

[Brief explanation of drawings]

Figures 1 to 3 show examples of actual sieves of the present invention.
The figure is a side view, FIG. 2 is a sectional view showing the lid part along the line n-■ in FIG. 1, No. 31 is an exploded oblique view A, and FIGS. 4 is a side view, FIG. 5 is a sectional view taken along the fourth white line V-V, FIG. 6 is an exploded perspective view, and FIG. 7 is a perspective view showing the load acting on the frame. lFi frame, 2 is the front frame, 3 is the front wheel. 5/i suspension, 8a and gb are the receiving parts, 9 is the cushioning material, 10 is the body, +372.1ull is the placket. Figure 1 Figure 2 Figure 4 V -■

Claims (1)

[Claims] A gate-shaped front frame 2 is provided at the front of the frame 1, and the suspension 5 on the front wheel 3 side is supported on both sides of the front frame 2, and the rear end of the frame 1 is placed on the rear side of the body 10. In a body mount device for a dump truck that rotatably supports the front frame 2, the front frame 2 has left and right shoulders, and the suspension 5 on the front wheel 3 side substantially extends above the support portion, and is symmetrically mounted. In addition, left and right brackets 13a, 13b are provided on the outer surface of the front wall 12 of the body 10, and have contact surfaces that abut on the receiving parts 8a, 8b of the front frame 2. Receiving parts 8a, 8
A body mount device for a dump truck, characterized in that cushioning materials 9, 9 are fixed to at least one of the abutting surfaces of brackets 13a, 13b.