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KR-102963117-B1 - REAR DOOR STRUCTURE OF TRUCK LOADING BOX EQUIPPED WITH NOISE PREVENTION FUNCTIONE

KR102963117B1KR 102963117 B1KR102963117 B1KR 102963117B1KR-102963117-B1

Abstract

The rear door structure of a truck cargo box equipped with a noise generation prevention function according to the disclosed invention comprises: a first shock absorbing member provided on one side of the opposing surfaces of the truck cargo box and the rear door; and a second shock absorbing member provided at a position opposite to the first shock absorbing member, which absorbs shock by means of elastic force while contacting the opposing surface of the first shock absorbing member when the rear door is closed. According to the present invention, first and second shock absorbers are provided on the opposing surfaces of the truck cargo box and the rear door, wherein the truck cargo box is provided with a first shock absorber equipped with a first shock absorber pad, and the rear door, which is opened and closed, is provided with a second shock absorber pad that can move back and forth by the elastic force of an elastic body, thereby effectively preventing noise caused by the impact applied when the rear door is closed by the elastic force and the shock absorber pad, and by filling the interior of the rear door with a sound-absorbing material, it is possible to prevent the resonance phenomenon that occurs when the interior of the rear door is empty, and the sound-absorbing material is attached to the outer surface of the rear door to double the effect of noise reduction.

Inventors

  • 김용근

Dates

Publication Date
20260511
Application Date
20230725

Claims (4)

  1. A first shock absorbing member (110) provided on one side of the opposing surface of the truck cargo box (12) and the rear door (14); and It includes a second shock absorber (120) provided at a position opposite to the first shock absorber (110), which absorbs shock by means of elastic force while contacting the opposite surface of the first shock absorber (110) when the rear door (14) is closed. The above first shock absorbing part (110) is A first body (112) fixed to one end of either the truck cargo box (12) or the rear door (14); and It includes a first shock absorbing pad (114) provided at the end of the first body (112); The above second shock absorbing part (120) is A support member (124) having a second shock-absorbing pad (126) on one side and a spiral shaft (124a) on the other side; An elastic body (128) provided around the circumference of the spiral shaft (124a); A second body (122) fixed to the other side of the support member (124), having an internal space formed to accommodate the elastic body (128), and a through hole formed through which one end of the spiral shaft (124a) can pass and protrude to the outside; and It includes a nut (N) that is screw-fastened to a spiral shaft (124a) protruding outwardly through a through hole of the second body (122), and It is possible to adjust the degree of elasticity of the elastic body (128) by adjusting the degree of tightening of the nut (N). The first body (112) and the second body (122) each have a "C" shaped cross-section, and The second body (122) has grooves formed on both sides into which a portion of the side of the elastic body (128) is inserted to prevent rotation and is supported. A sound-absorbing material (130) is filled into the interior space of the rear door (14), and a sound-absorbing material (140) is attached to the exterior of the rear door (14). The above support member (124) includes an upper plate (124a) and a lower plate (124b), and the lower part of the upper plate (124a) and the upper part of the lower plate (124b) are hinge-connected so as to be rotatable, the upper plate (124a) is provided with a first spiral shaft (124a-1) inserted into a first elastic body (128a), and the lower plate (124b) is provided with a second spiral shaft (124a-2) inserted into a second elastic body (128b), and the elastic modulus of the second elastic body (128b) is configured to be greater than the elastic modulus of the first elastic body (128a), characterized in that the rear door structure of a truck cargo box equipped with a noise generation prevention function.
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Description

Rear door structure of truck loading box equipped with noise prevention function The present invention relates to a rear door structure of a truck cargo bed equipped with a noise generation prevention function, and more specifically, to a rear door structure of a truck cargo bed that prevents noise generated when the rear door of the truck cargo bed is closed. Generally, trucks are primarily used to transport cargo such as white clay, limestone, aggregates, gypsum, and gravel. These materials are loaded into the truck's cargo bed, transported to an unloading site, and then unloaded. Here, in the case of a dump truck, the door of the cargo box is provided hinged to a bracket at the rear of the cargo box, and when the cargo box is lifted to discharge the cargo loaded in it, the door of the cargo box opens due to its own weight and the cargo is discharged from the cargo box, and when the cargo box is lowered again, the door closes due to its own weight. In addition, the driver's seat is equipped with a locking device that locks the door so that it does not rotate further once it closes due to its own weight. Technology related to such truck cargo bed doors has been proposed in Korean Registered Patent No. 1205112. However, Patent Document 1 had a problem in that when the door of the truck cargo box was closed, the door collided with the rear of the cargo box, causing noise and resulting in complaints. FIG. 1 is a side view illustrating a truck with a rear door structure of a truck cargo box equipped with a noise generation prevention function according to the present invention. FIG. 2 is an exploded perspective view illustrating a noise prevention device in the rear door structure of a truck cargo box equipped with a noise prevention function according to the present invention. FIG. 3 is a side view illustrating the state before and after operation of the noise prevention device when the rear door is closed by the rear door structure of a truck cargo box equipped with a noise generation prevention function of the present invention. FIG. 4 is a cross-sectional view and a side view illustrating the rear door structure of a truck cargo box equipped with a noise generation prevention function according to the present invention, in which a sound-absorbing material is filled inside the rear door and a sound-absorbing material is attached to the outer surface of the rear door. FIG. 5 is a side cross-sectional view illustrating a second shock absorbing part of another embodiment in the rear door structure of a truck cargo box equipped with a noise generation prevention function of the present invention. The above-mentioned objectives, features, and other advantages of the present invention will become more apparent by describing preferred embodiments of the present invention in detail with reference to the accompanying drawings. Hereinafter, a rear door structure of a truck cargo box equipped with a noise generation prevention function according to an embodiment of the present invention will be described in detail with reference to the attached drawings. FIG. 1 is a side view illustrating a truck with a rear door structure of a truck cargo box equipped with a noise generation prevention function according to the present invention; FIG. 2 is an exploded perspective view illustrating a noise prevention device in the rear door structure of a truck cargo box equipped with a noise generation prevention function according to the present invention; FIG. 3 is a side view illustrating the state before and after operation of the noise prevention device when the rear door is closed by the rear door structure of a truck cargo box equipped with a noise generation prevention function according to the present invention; FIG. 4 is a side cross-sectional view and a side view illustrating a state in which a sound-dampening material is filled inside the rear door and a sound-absorbing material is attached to the outer surface of the rear door in the rear door structure of a truck cargo box equipped with a noise generation prevention function according to the present invention; FIG. 5 is a side cross-sectional view illustrating a second shock-absorbing part of another embodiment in the rear door structure of a truck cargo box equipped with a noise generation prevention function according to the present invention. Referring to FIGS. 1 and 5, the rear door of a truck cargo box having a noise prevention function according to one embodiment of the present invention is equipped with a noise prevention device (100) so as to prevent noise when the rear door (14) located at the rear of the cargo box (12) of the truck (10) is closed. The noise reduction device (100) is composed of a first shock-absorbing part (110) and a second shock-absorbing part (120) as shown in FIGS. 1 to 3, and the first shock-absorbing part (110) and the second shock-absorbing part (120) are respectively fixed to one side and the other side of the opposite sides of the car