Frame lap joint type dumper rear door

Abstract

The utility model discloses a frame lap joint type dumper rear door which comprises an upper edge beam, a lower edge beam, a left vertical beam, a right vertical beam and a rear door plate, the upper edge beam, the lower edge beam, the left vertical beam and the right vertical beam are fixed into a frame structure in a mutual lap joint mode, and the rear door plate is welded and fixed to the back side of the frame structure. Wherein the left vertical beam and the right vertical beam are of long-strip-shaped structures, the cross sections of the left vertical beam and the right vertical beam are right trapezoids, and the top ends are sealed; the two ends of the upper edge beam extend outwards to be provided with integrally-formed tongue-shaped panels, and the tongue-shaped panels are fixed to the front end faces of the corresponding left vertical beam and the right vertical beam in a lap joint mode respectively. The door plate is simple in structure, low in production and operation cost, high in production efficiency, capable of being firmer while reducing the weight, tight in weld joint and good in attractiveness, and the strength of a force bearing point of the door plate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dump truck accessories, in particular to a frame-lapped dump truck rear door. Background Art

[0002] A dump truck is a vehicle that unloads goods by itself through hydraulic or mechanical lifting, also known as a tipping truck; it consists of a car chassis, a hydraulic lifting mechanism, a cargo compartment, and a power take-off device. The compartment of a dump truck is divided into two types: rearward tipping and sideward tipping. The movement of the piston rod is controlled by the operating system. Rearward tipping is more common, and the piston rod is pushed to tip the compartment. A few cases have two-way tipping. At present, the rear door structure installed at the rear of the dump truck's cargo box is mostly a structure in which multiple crossbeams and longitudinal beams are welded in an alternating manner. The welding method is butt welding between the side beams, and then the external cover is wrapped with corners, which makes the structure complex, heavy, high in material cost, and large in welding workload. Utility Model Content

[0003] The purpose of the utility model is to solve the shortcomings of the above-mentioned existing background technology, reduce material costs without affecting the strength of the door panel, and thus provide a frame-lapped dump truck rear door.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a frame-overlapping dump truck rear door, including an upper side beam, a lower side beam, a left vertical beam, a right vertical beam and a rear door plate, wherein the upper side beam, the lower side beam, the left vertical beam and the right vertical beam are overlapped and fixed to form a frame structure, and the rear door plate is welded and fixed to the back side of the above frame structure; wherein the left vertical beam and the right vertical beam are both long strip structures, and their cross-sections are right-angled trapezoids with sealed top ends; both ends of the upper side beam are extended outward to provide an integrally formed tongue-shaped panel, and the tongue-shaped panel is overlapped and fixed to the front end surfaces of the corresponding left vertical beam and the right vertical beam, respectively.

[0005] Furthermore, corresponding left supporting beams and right supporting beams are respectively provided between the left vertical beam and the lower side beam, and between the right vertical beam and the lower side beam. The structures of the left supporting beam and the right supporting beam are the same and are symmetrically installed. The cross-sections of the left supporting beam and the right supporting beam are respectively the same as those of the left vertical beam and the right vertical beam, and both ends of the left supporting beam and the right supporting beam are provided with tongue-shaped panels extending outward, forming an integral body. The corresponding lower side beam is in the shape of a long strip, and the tongue-shaped panels at both ends of the left supporting beam are respectively overlapped and fixed to the lower end of the left vertical beam and the left end of the lower side beam, and the tongue-shaped panels at both ends of the right supporting beam are respectively overlapped and fixed to the lower end of the right vertical beam and the right end of the lower side beam.

[0006] Furthermore, it also includes a middle cross beam, which is welded and fixed to the front side of the rear door panel, and its two ends are also provided with tongue-shaped panels extending outward, which are integrally formed, and the tongue-shaped panels are overlapped and fixed to the middle front end surfaces of the left vertical beam and the right vertical beam respectively.

[0007] Furthermore, the above overlapping fixations are all achieved by welding.

[0008] Furthermore, the cross-sectional thicknesses of the upper side beam, the left receiving beam, the right receiving beam, and the middle cross beam are greater than the thickness of one tongue-shaped panel of the left vertical beam or the right vertical beam, and the inner side surfaces of the corresponding tongue-shaped panels are tightly welded to the left vertical beam or the right vertical beam.

[0009] Compared with the prior art, the present utility model has the following beneficial effects: The structure of the present utility model is simple, with low production and operation costs, high production efficiency, being stronger while reducing weight, having tight welds, increasing the strength at the force-bearing points of the door panel, and having good aesthetics. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0011] Figure 2 is a front view of the present utility model;

[0012] Figure 3 is Figure 2 a cross-sectional view in the A-A direction of

[0013] Figure 4 is a schematic diagram of the structure of the left receiving beam in the present utility model;

[0014] Figure 5 is Figure 4 an isometric rear view of the structure in

[0015] Figure 6 is a schematic diagram of the structure of the middle cross beam in the present utility model;

[0016] In the figures: 1. upper side beam, 2. left vertical beam, 3. right vertical beam, 4. lower side beam, 5. left receiving beam, 6. right receiving beam, 7. middle cross beam, 8. rear door panel, 9. tongue-shaped panel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] It should be noted that in the description of the present utility model, terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only relational terms determined for the convenience of describing the structural relationships of the components in the present utility model, rather than specifically referring to any component in the present utility model that must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as a limitation to the present utility model.

[0018] In addition, in the description of the present utility model, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0019] The following further describes in detail the specific embodiments of the present utility model with reference to the accompanying drawings:

[0020] As Figure 1 and Figure 2 shown, a rear door of a border-lapped dump truck is applied to a rear-tipping dump truck, including an upper side beam 1, a lower side beam 4, a left vertical beam 2, a right vertical beam 3, a left receiving beam 5, a right receiving beam 6, an intermediate cross beam 7, and a rear door panel 8. Among them, the upper side beam 1, the right vertical beam 3, the right receiving beam 6, the lower side beam 4, the left receiving beam 5, and the left vertical beam 2 are sequentially connected end to end and overlapped and fixed to form a frame structure. The intermediate cross beam 7 is horizontally overlapped and fixed between the left vertical beam 2 and the right vertical beam 3; the rear door panel 8 is fixedly installed on the back side of the above frame structure by welding, facing the inside of the truck bed during application, and is relatively sealed to prevent leakage of materials during rear door loading and unloading.

[0021] The specific manner of overlapping and fixing the above side beams to each other is that the left vertical beam 2 and the right vertical beam 3 have the same structure, both are strip-shaped with closed upper ends, and are formed by stamping and bending. Their cross-sections are both right-angled trapezoidal, and the two are symmetrically arranged, with the inclined surfaces facing each other, as Figure 3 shown; the upper side beam 1 is also formed by stamping and bending. Both ends of the middle plate extend outward to form tongue-shaped panels 9, which are integrally formed. The two ends of the upper side beam 1 are respectively butted to the upper ends of the left vertical beam 2 and the right vertical beam 3, and the tongue-shaped panels 9 at both ends are respectively overlapped on the front end faces of the left vertical beam 2 and the right vertical beam 3, closely attached and fixed by welding. The lower side beam 4 is of a strip-shaped structure with flat ends at both ends, and is welded and fixed to the lower end of the rear door panel 8; the left receiving beam 5 and the right receiving beam 6 have the same structure, and their cross-sections are the same as those of the left vertical beam 2 and the right vertical beam 3 respectively, as Figure 4 and Figure 5 shown. Taking the left receiving beam 5 as an example, both ends of the left receiving beam 5 also extend outward with integrally formed tongue-shaped panels 9, which have the same structure as the upper side beam 1. The upper end of the left receiving beam 5 is butted to the lower end of the left vertical beam 2, and its lower end is butted to the left end of the lower side beam 4, and they are closely attached to each other. At the same time, the tongue-shaped panels 9 at both ends of the left receiving beam 5 are respectively overlapped on the front side of the lower end of the left vertical beam 2 and the front side of the left end of the lower side beam 4, and are overlapped and fixed by welding at the same time; the right receiving beam 6 and the left receiving beam 5 are symmetrically welded and installed with the vertical center axis of the door panel as the center line.

[0022] Combined Figure 6 As shown, the middle cross beam 7 is also formed by stamping and bending, and its cross-section is in the shape of an isosceles trapezoid; both ends of the middle cross beam 7 extend outwards to form tongue-shaped panels 9, and the tongue-shaped panels 9 at both ends are respectively lapped on the front end faces of the left vertical beam 2 and the right vertical beam 3, and then relatively fixed by welding, and the weld seams at this time will be denser.

[0023] Furthermore, the cross-sectional thicknesses of the upper cross beam 1, the left receiving beam 5, the right receiving beam 6 and the middle cross beam 7 are all greater than the thickness of a tongue-shaped panel 9 of the left vertical beam 2 or the right vertical beam 3, which is convenient for the inner side surface of the corresponding tongue-shaped panel 9 to be closely welded to the left vertical beam 2 or the right vertical beam 3.

[0024] Using the above lap joint fixing method for the fixing and manufacturing of the rear door frame can save manufacturing costs, reduce the welding workload, improve the tightness of the weld seams at the welding points, and improve the strength and aesthetics of the entire rear door.

[0025] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. A frame-jointed dump truck rear door, characterized in that: It includes an upper side beam, a lower side beam, a left vertical beam, a right vertical beam and a rear door panel, wherein the upper side beam, the lower side beam, the left vertical beam and the right vertical beam are overlapped and fixed to each other to form a frame structure, and the rear door panel is welded and fixed to the back side of the above-mentioned frame structure; wherein the left vertical beam and the right vertical beam are both long strip structures, and their cross-sections are right-angled trapezoids and the top ends are sealed; both ends of the upper side beam are extended outward to be provided with an integrally formed tongue-shaped panel, and the tongue-shaped panel is overlapped and fixed to the front end surfaces of the corresponding left vertical beam and the right vertical beam respectively.

2. The frame-jointed dump truck rear door according to claim 1, characterized in that: Corresponding left supporting beams and right supporting beams are respectively provided between the left vertical beam and the lower side beam, and between the right vertical beam and the lower side beam. The left supporting beam and the right supporting beam have the same structure and are symmetrically installed. The cross-sections of the left supporting beam and the right supporting beam are respectively the same as the left vertical beam and the right vertical beam, and both ends of the left supporting beam and the right supporting beam are provided with tongue-shaped panels extending outward, forming an integral body. The corresponding lower side beam is in the shape of an elongated strip, and the tongue-shaped panels at both ends of the left supporting beam are respectively overlapped and fixed to the lower end of the left vertical beam and the left end of the lower side beam, and the tongue-shaped panels at both ends of the right supporting beam are respectively overlapped and fixed to the lower end of the right vertical beam and the right end of the lower side beam.

3. The frame-jointed dump truck rear door according to claim 2, characterized in that: It also includes a middle cross beam, which is welded and fixed to the front side of the rear door panel. Both ends of the middle cross beam are also provided with tongue-shaped panels extending outwards. The tongue-shaped panels are integrally formed, and the tongue-shaped panels are overlapped and fixed to the middle front end surfaces of the left vertical beam and the right vertical beam respectively.

4. A frame-jointed dump truck rear door according to any one of claims 1 to 3, characterized in that: The above-mentioned lap-joint fixings are all connected by welding.

5. The frame-jointed dump truck rear door according to claim 3, characterized in that: The cross-sectional thickness of the upper side beam, the left supporting beam, the right supporting beam and the middle cross beam is greater than the thickness of a tongue-shaped panel of the left vertical beam or the right vertical beam, and the inner side surface of the corresponding tongue-shaped panel is tightly welded to the left vertical beam or the right vertical beam.

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