JPH0732354Y2 - Under guard attachment device for construction truck dump trucks - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a device for mounting an underguard of a dump truck for construction machinery on a frame.

[Conventional technology]

Dump trucks for construction machinery often travel on rough terrain, so an underguard is attached to the bottom of the frame to protect the engine and transmission.

[Problems to be solved by the device]

Dump trucks for construction machinery are large, the width of the frame is large, and the engine and transmission are also large in order to obtain a large traction force, so the underguard is large and heavy.

For this reason, it is troublesome to attach and remove the underguard, and if the underguard is deformed, it may not be properly attached to the frame.

Then, this invention aims at providing the under guard attachment device of the dump truck for construction machines which was able to solve the above-mentioned subject.

[Means and Actions for Solving the Problems]

A mounting vertical plate is integrally provided on one side before and after the under guard, and a mounting horizontal plate is integrally provided on the other side, and a projecting piece and a mounting surface are provided on the frame 1 side so as to face the mounting vertical plate and the mounting horizontal plate. The projecting piece and the mounting vertical plate are vertically rotatably connected by a horizontal pin, and the mounting horizontal plate is bolted to the mounting surface via a cushion material, and the horizontal pin is connected to the head, the screw rod and the nut member. And collar, and insert the collar through the holes of the mounting vertical plate and the protruding piece,
Insert the screw rod into the collar, screw the nut member together, press the nut member and the head against both end surfaces of the collar, and insert the collar into the upper and lower rubber pieces by inserting the collar. Construction in which the mounting horizontal plate is screwed into the mounting surface and the mounting horizontal plate is supported on the mounting surface via rubber pieces between the upper surface of the mounting horizontal plate and the mounting surface and between the lower surface of the mounting horizontal plate and the bolt head. This is an underguard attachment device for a mechanical dump truck, which allows the underguard to rotate up and down around a horizontal pin, absorb deformation and backlash with a cushion material, and prevent lateral pins and bolts from coming loose. Disappear.

〔Example〕

As shown in FIG. 1, FIG. 2, FIG. 3, and FIG. 4, the frame 1 has left and right main girders 2, 2 connected by a front girder 3 and a front cross member 4, and the left and right main girders 2 An engine 5 is attached between the cross member 4 and the front girder 3, and an engine under guard 6 is attached between the cross member 4 and the front girder 3.

Left and right mounting vertical plates 7, 7 are integrally formed at the rear end edge of the underguard 6, and a mounting horizontal plate 8 is formed at the front end edge in the left-right direction.
Is integrally formed with the front cross member 4
5, projecting pieces 9 are integrally provided, and the projecting pieces 9 and the mounting vertical pieces 7 are vertically rotatably connected by horizontal pins 10 as shown in FIG.

The horizontal pin 10 includes a head portion 10a, a screw rod portion 10b, and a nut member 10c.
And a collar 10d. The collar 10d is inserted into the hole 7a of the mounting vertical piece 7 and the hole 9a of the projecting piece 9, the screw rod portion 10b is inserted into the collar 10d, and the nut member 10c is screwed to the head 10a and the nut. Since the portion 10c is pressed against both end surfaces of the collar 10d, the tightening torque of the nut member 10c is supported by the collar 10d and the head portion 10a so that it does not act on the mounting vertical piece 7.
The tightening torque of 10c can be increased.

The mounting lateral plate 8 is connected to the lower surface of the front girder 3 by a bolt 12 via a cushion material 11, and the cushion material 11 has a pair of upper and lower rubber pieces 13, 13 as shown in FIG. It is arranged on the upper and lower surfaces of the above, and the receiving plate 14 is in contact with the rubber piece 13 therebelow, and the collar 15 is in contact with the receiving plate 14
The bolt 12 is screwed to the front girder 3 from 15.

As shown in FIG. 7 to FIG. 10, the transmission 20 has the left and right main girders 2,2.
Attached to the bracket 21 attached to
Is mounted by tightening one side plate 21a and the other side plate 21b on both side surfaces of the main girder 2 with bolts 21c, and the projecting piece 2
2 are integrally provided, the left and right mounting vertical plates 24, 24 are provided in the front part of the under guard 23 of the transmission, and the horizontal mounting plate 25 extending in the left-right direction is provided in the rear part. Vertical plate
24 is connected to the projecting piece 22 by a horizontal pin 26 so as to be vertically rotatable.

The horizontal pin 26 includes a head 26a and a screw rod 26b as shown in FIG.
And a nut member 26c and a collar 26d. The collar 26d is inserted into the hole 24a of the mounting vertical plate 24 and the hole 22a of the protruding piece 22, and the screw rod 26
Insert b into the collar 26d and screw in the nut member 26c to
6a and the nut portion 26c are pressed against both end surfaces of the collar 26d, so that the tightening torque of the nut member 26c is reduced to the collar 2
Since it is supported by 4d and the head 26a and does not act on the mounting vertical piece 24, the tightening torque of the nut member 26c can be increased.

The horizontal mounting plate 25 is connected to a bracket 28 mounted on the intermediate cross member 27 by a cushion material 29 and bolts 30.

The bracket 28 is integrally provided with a connector 32 that fastens and fixes the pipe mounting horizontal plate 31 to the intermediate cross member 27, and the cushion member 29 has a pair of rubber pieces 3 as shown in FIG.
It consists of 3, support plate 34 and collar 35.

[Effect of device]

By loosening the bolts, the underguard can be rotated downwards about the horizontal pin, so the underguard can be easily removed and attached, and since the bolts are tightened through the cushioning material, the underguard may be slightly deformed. Not only can the deformation be absorbed by the cushion material, but it can be correctly attached to the frame side, and rattling can be prevented.

Further, the tightening torque of the nut member of the lateral pin is supported by the collar and does not act on the mounting vertical piece and the projecting piece, and the tightening torque can be tightened with a large tightening torque.

Moreover, since the tightening torque of the bolt for mounting the rubber piece serving as the cushion material is supported by the collar and does not act on the rubber piece, the bolt will not come loose and come off.

[Brief description of drawings]

1 is an exploded perspective view of an engine underguard mounting portion, FIG. 2, FIG. 3, and FIG. 4 are front views, plan views, side views, and FIG. 5 is a sectional view taken along line VV of FIG. 6 is a sectional view taken along the line VI-VI of FIG. 3, FIG. 7 is an exploded perspective view of an underguard mounting portion of the transmission, FIGS. 8, 9 and 10 are front views,
A plan view, a side view, FIG. 11 and FIG. 12 are XI-XI lines of FIG.
It is a XII-XII sectional view taken on the line. 1 is a frame, 5 is an engine, 6 is an underguard, 7
Is a vertical mounting plate, 8 is a horizontal mounting plate, 9 is a protruding piece, 10 is a horizontal pin, 11
Is a cushion material, 12 is a bolt, 20 is a transmission, 22 is a protrusion,
23 is an under guard, 24 is a vertical mounting plate, 25 is a horizontal mounting plate, 26
Is a horizontal pin, 29 is a cushion material, and 30 is a bolt.

Claims (1)

[Scope of utility model registration request] 1. A vertical mounting plate on one side of the front and rear of the under guard,
A mounting horizontal plate is integrally provided on the other side, and a projecting piece and a mounting surface are provided on the frame 1 side so as to face the mounting vertical plate and the mounting horizontal plate, and the projecting piece and the mounting vertical plate are vertically moved by a horizontal pin. In addition to being rotatably connected, the mounting horizontal plate is bolted to the mounting surface via a cushion material, and the horizontal pin is composed of a head, a screw rod portion, a nut member and a collar, and the collar is mounted on the mounting vertical plate. And insert it into the hole of the protrusion,
Insert the screw rod into the collar, screw the nut member together, press the nut member and the head against both end faces of the collar, and insert the collar into the upper and lower rubber pieces by inserting the collar. The attached horizontal plate is screwed onto the mounting surface to support the mounting horizontal plate on the mounting surface via rubber pieces between the upper surface of the mounting horizontal plate and the mounting surface and between the lower surface of the mounting horizontal plate and the bolt head. An underguard attachment device for construction equipment dump trucks.