Bearing type micro truck body rear suspension structure meeting heavy load requirement

Abstract

The invention discloses a bearing type micro truck body rear suspension structure meeting the heavy load requirement, and belongs to the field of automobile manufacturing. The rear suspension structure of the micro truck body comprises two longitudinal beams arranged in a spaced mode and a first cross beam fixed between the two longitudinal beams, box-shaped supporting structures are fixed to the tops of the longitudinal beams, a second cross beam is fixed between one ends of the tops of the two box-shaped supporting structures, and each box-shaped supporting structure comprises an inverted-U-shaped top plate; an inner flanging side plate and an outer flanging side plate are fixed to the two ends of the bottom of the inverted-U-shaped top plate, a U-shaped bottom plate is fixed to the bottoms of the inner flanging side plate and the outer flanging side plate, the U-shaped bottom plate is fixed to the top of the longitudinal beam, an n-shaped rear cover assembly is fixed to the end, away from the second cross beam, of the box-shaped supporting structure, and the bottom of the n-shaped rear cover assembly is fixed to the top of the longitudinal beam. The rear suspension structure is realized by adopting an upper, middle and lower three-layer overlapped structure, so that the torsional rigidity and the bending rigidity of the rear suspension are controlled and improved, and the requirement that the loading of the whole vehicle is greater than 1.5 tons is met.

Description

Technical Field

[0001] The invention relates to the field of automobile manufacturing, and in particular to a rear overhang structure of a load-bearing micro truck that meets heavy-load requirements. Background Art

[0002] The rear overhang structure of the load-bearing mini truck in the prior art is basically realized by lap-welding the upper and lower layers. The upper and lower layers are both made of open-section "J"-shaped beams, and the upper and lower layers are welded together with reinforcing plates to strengthen the strength of the connection. This structure is not strong enough and can only meet the requirements of a vehicle load of 0.7 to 1 ton, and cannot meet the requirements of a vehicle load of more than 1.5 tons. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a rear suspension structure for a load-bearing micro truck that meets the heavy-load requirements. The structure is implemented by a three-layer structure of upper, middle and lower layers. The upper and lower layers are closed rectangular cross-section beams, and the middle layer is a complex box-shaped structure that replaces the reinforcement plate in the prior art, thereby controlling and improving the torsional stiffness and bending stiffness of the rear suspension, meeting the requirements of a vehicle load greater than 1.5 tons.

[0004] To achieve the above-mentioned purpose, the present invention designs a rear overhang structure of a load-bearing mini truck that meets the heavy-load requirements. It includes two longitudinal beams arranged at intervals and a first cross beam fixed between the two longitudinal beams, the tops of the longitudinal beams are fixed with a box-shaped support structure, a second cross beam is fixed between the top ends of the two box-shaped support structures, the box-shaped support structure includes an inverted U-shaped top plate, the bottom ends of the inverted U-shaped top plate are fixed with inner and outer flanged side plates, the bottoms of the inner and outer flanged side plates are fixed with a U-shaped bottom plate, the U-shaped bottom plate is fixed to the top of the longitudinal beam, the end of the box-shaped support structure away from the second cross beam is fixed with a "J"-shaped rear cover assembly, and the bottom of the "J"-shaped rear cover assembly is fixed to the top of the longitudinal beam. The second cross beam is the upper structure, the box-shaped support structure and the I-shaped rear cover assembly are the middle structure, and the longitudinal beam and the first cross beam are the bottom structure; this upper, middle and lower three-layer stacking design can solve the problem of insufficient strength of the vehicle body rear suspension structure in the prior art, and can increase the carrying capacity by 50 to 100% on the basis of the prior art, thereby effectively solving the user's demand for the cargo quality of micro trucks and meeting the usage scenarios of freight logistics users.

[0005] Preferably, the longitudinal beam comprises a longitudinal beam body, the longitudinal beam body is in an inverted "X" shape with an opening facing upward, and a U-shaped reinforcing beam in contact with an inner wall of the longitudinal beam body is provided in the opening of the longitudinal beam body.

[0006] Preferably, a U-shaped reinforcement plate is fixed to the top of the inner wall of the U-shaped reinforcement beam, and the height and length of the U-shaped reinforcement plate are both smaller than the U-shaped reinforcement beam.

[0007] Preferably, the U-shaped reinforcement beam is formed by welding three U-shaped reinforcement beam units that are fixedly connected in sequence.

[0008] Preferably, the second cross beam comprises a second cross beam body, which is formed by welding an upper inverted L-shaped plate and a lower regular L-shaped plate, the height of the inverted L-shaped plate is smaller than the regular L-shaped plate, the bottom of the inverted L-shaped plate is folded outwardly in the horizontal direction to form a first extension plate, and the first extension plate is fixed to the top edge of the first cross beam. The first cross beam is an inverted "X"-shaped structure.

[0009] Preferably, inverted L-shaped reinforcement plates are provided at both ends of the inner wall of the inverted L-shaped plate.

[0010] Preferably, a first reinforcing plate is provided at both ends of the bottom inner wall of the positive L-shaped plate, a second reinforcing plate is provided on the inner wall of the back plate of the positive L-shaped plate, the first reinforcing plate is L-shaped, and the second reinforcing plate is inverted L-shaped.

[0011] Preferably, the rear cover assembly comprises an I-shaped rear cover plate, one end of which is fixed with a rear cover plate end plate, and the rear cover plate end plate is fixed on a box-shaped supporting structure.

[0012] Preferably, a rear cover lining plate is provided inside the X-shaped rear cover plate.

[0013] Preferably, a fitted inner lining plate is fixed to the inner wall of the inner flange side plate, and a fitted outer lining plate is fixed to the inner wall of the outer flange side plate.

[0014] Beneficial effects of the present invention:

[0015] 1. The rear suspension structure of the present invention is realized by a three-layer structure of upper, middle and lower layers, which controls and improves the torsional rigidity and bending rigidity in different directions. The structural assembly takes into account the processability and adopts spot welding, plug welding and bolt connection to connect the three layers into an integral whole without splitting, thus meeting the structural requirements of the load-bearing body;

[0016] 2. The upper rectangular crossbeam body of the present invention is welded by a positive L-shaped plate and an inverted L-shaped plate, which improves the torsional rigidity in the Y direction and the bending rigidity in the X and Z directions while ensuring the lightweight of the vehicle body (the longitudinal direction of the vehicle body is the X direction, which is usually defined as the direction in which the vehicle moves forward. When the vehicle moves straight forward, it moves along the X axis; the transverse direction of the vehicle body is the Y direction, which is perpendicular to the X axis and usually points to the left and right sides of the vehicle. When the vehicle moves sideways, such as turning on a flat road, it moves along the Y axis; the vertical direction of the vehicle body is the Z direction, which is perpendicular to the X axis and the Y axis and points to the top of the vehicle. This axis is usually used to describe the vertical movement of the vehicle, such as up and down bumps.);

[0017] 3. The middle layer of the present invention is composed of a box-shaped support structure and an "X"-shaped rear cover assembly, so as to improve the torsional rigidity in the X, Y and Z directions;

[0018] 4. The lower structure of the present invention adopts a U-shaped reinforcement beam embedded in the inner wall of the longitudinal beam body, and a U-shaped reinforcement plate is fixed to the inner and top walls of the U-shaped reinforcement beam to form a rectangular cross-section to improve the torsional rigidity in the X direction and the bending rigidity in the Y and Z directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A stereogram of the invention;

[0020] Figure 2 for Figure 1 Split effect diagram;

[0021] Figure 3 This is a disassembled diagram of the box-shaped support structure and the “J”-shaped rear cover assembly;

[0022] Figure 4 This is the split diagram of the second beam;

[0023] Figure 5 This is a split diagram of the longitudinal beam.

[0024] Reference numerals:

[0025] 1 longitudinal beam, 11 longitudinal beam body, 12 U-shaped reinforcement beam, 121U-shaped reinforcement beam unit, 13U-shaped reinforcement plate,

[0026] 2First beam,

[0027] 3 box-shaped support structure, 31 U-shaped top plate, 32 inner flanged side plate, 321 inner lining plate, 33 outer flanged side plate, 331 outer lining plate, 34 U-shaped bottom plate,

[0028] 4 second cross beam, 41 inverted L-shaped plate, 411 first extension plate, 412 inverted L-shaped reinforcement plate, 42 regular L-shaped plate, 421 first reinforcement plate, 422 second reinforcement plate,

[0029] 5 rear cover assembly, 51 X-shaped rear cover plate, 511 rear cover inner lining plate, 52 rear cover plate end plate. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0036] Example

[0037] like Figures 1 to 5The rear overhang structure of a load-bearing mini truck that meets the heavy-load requirements shown in the figure includes two longitudinal beams 1 arranged at intervals and a first cross beam 2 fixed between the two longitudinal beams 1. The longitudinal beam 1 includes a longitudinal beam body 11, which is an inverted "X" shape with an opening facing upwards. A U-shaped reinforcing beam 12 that fits the inner wall of the longitudinal beam body 11 is provided in the opening of the longitudinal beam body 11. A U-shaped reinforcing plate 13 is fixed to the top of the inner wall of the U-shaped reinforcing beam 12, and the height and length of the U-shaped reinforcing plate 13 are both smaller than the U-shaped reinforcing beam 12. The U-shaped reinforcing beam 12 is welded by three U-shaped reinforcing beam units 121 that are fixedly connected in sequence.

[0038] A box-shaped support structure 3 is fixed to the top of each longitudinal beam 1, and a second cross beam 4 is fixed between the top ends of the two box-shaped support structures 3. The box-shaped support structure 3 includes an inverted U-shaped top plate 31, and an inner flanged side plate 32 and an outer flanged side plate 33 are fixed to the bottom ends of the inverted U-shaped top plate 31. A U-shaped bottom plate 34 is fixed to the bottom of the inner flanged side plate 32 and the outer flanged side plate 33. The U-shaped bottom plate 34 is fixed to the top of the longitudinal beam 1, and a fitted inner lining plate 321 is fixed to the inner wall of the inner flanged side plate 32, and a fitted outer lining plate 331 is fixed to the inner wall of the outer flanged side plate 33. A "J"-shaped rear cover assembly 5 is fixed to the end of the box-shaped support structure 3 away from the second cross beam 4, and the bottom of the "J"-shaped rear cover assembly 5 is fixed to the top of the longitudinal beam 1. The rear cover assembly 5 comprises an I-shaped rear cover plate 51, one end of which is fixed with a rear cover plate end plate 52, which is fixed on the box-shaped support structure 3. A rear cover inner lining plate 511 is arranged inside the I-shaped rear cover plate 51.

[0039] The second crossbeam 4 includes a second crossbeam body, which is welded by an inverted L-shaped plate 41 at the top and a regular L-shaped plate 42 at the bottom. The height of the inverted L-shaped plate 41 is smaller than the regular L-shaped plate 42. The bottom of the inverted L-shaped plate 41 is folded outward in the horizontal direction to form a first extension plate 411. The first extension plate 411 is fixed to the top edge of the first crossbeam 2.

[0040] The inverted L-shaped plate 41 has an inverted L-shaped reinforcing plate 412 at both ends of the inner wall. The first reinforcing plate 421 is provided at both ends of the bottom inner wall of the positive L-shaped plate 42, and the second reinforcing plate 422 is provided on the inner wall of the back plate of the positive L-shaped plate 42. The first reinforcing plate 421 is L-shaped, and the second reinforcing plate 422 is inverted L-shaped.

[0041] The longitudinal beam 1 and the first cross beam 2 constitute a part of the lower body frame assembly of the load-bearing body, and are important load-bearing units of the lower frame. The second cross beam 4 is used to connect the left and right B-pillars and the floor of the vehicle, and is a part of the upper body of the load-bearing body, and is an important unit of the B-pillar annular load-bearing structure. The box-shaped support structure 3 and the rear cover assembly 5 connect the upper and lower bodies formed by the above-mentioned parts together to form a complete load-bearing body.

[0042] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A load-bearing mini truck body reinforced rear suspension structure, comprising two longitudinal beams (1) arranged at intervals and a first cross beam (2) fixed between the two longitudinal beams (1), characterized in that: A box-shaped support structure (3) is fixed on the top of each longitudinal beam (1); a second cross beam (4) is fixed between the top ends of the two box-shaped support structures (3); the box-shaped support structure (3) comprises an inverted U-shaped top plate (31); an inner flanged side plate (32) and an outer flanged side plate (33) are fixed at both ends of the bottom of the inverted U-shaped top plate (31); a U-shaped bottom plate (34) is fixed at the bottom of the inner flanged side plate (32) and the outer flanged side plate (33); the U-shaped bottom plate (34) is fixed to the top of the longitudinal beam (1); an I-shaped rear cover assembly (5) is fixed to the end of the box-shaped support structure (3) away from the second cross beam (4); the bottom of the I-shaped rear cover assembly (5) is fixed to the top of the longitudinal beam (1).

2. The load-bearing mini truck body reinforced rear suspension structure according to claim 1, characterized in that: The longitudinal beam (1) comprises a longitudinal beam body (11), the longitudinal beam body (11) is in the shape of an inverted "X" with an opening facing upward, and a U-shaped reinforcing beam (12) is arranged in the opening of the longitudinal beam body (11) and is in contact with the inner wall of the longitudinal beam body (11).

3. The reinforced rear suspension structure of a load-bearing mini truck body according to claim 2 is characterized in that: A U-shaped reinforcement plate (13) is fixed to the top of the inner wall of the U-shaped reinforcement beam (12), and the height and length of the U-shaped reinforcement plate (13) are both smaller than the U-shaped reinforcement beam (12).

4. The load-bearing mini truck body reinforced rear suspension structure according to claim 2, characterized in that: The U-shaped reinforcement beam (12) is formed by welding three U-shaped reinforcement beam units (121) that are fixedly connected in sequence.

5. The load-bearing mini truck body reinforced rear suspension structure according to claim 1, characterized in that: The second cross beam (4) comprises a second cross beam body, which is formed by welding an upper inverted L-shaped plate (41) and a lower positive L-shaped plate (42), wherein the height of the inverted L-shaped plate (41) is smaller than that of the positive L-shaped plate (42), and the bottom of the inverted L-shaped plate (41) is folded outwardly in a horizontal direction to form a first extension plate (411), and the first extension plate (411) is fixed to the top edge of the first cross beam (2).

6. The load-bearing mini truck body reinforced rear suspension structure according to claim 5, characterized in that: Inverted L-shaped reinforcement plates (412) are provided at both ends of the inner wall of the inverted L-shaped plate (41).

7. The load-bearing mini truck body reinforced rear suspension structure according to claim 5, characterized in that: A first reinforcing plate (421) is provided at both ends of the bottom inner wall of the positive L-shaped plate (42), and a second reinforcing plate (422) is provided on the inner wall of the back plate of the positive L-shaped plate (42); the first reinforcing plate (421) is L-shaped, and the second reinforcing plate (422) is inverted L-shaped.

8. The load-bearing mini truck body reinforced rear suspension structure according to claim 1, characterized in that: The rear cover assembly (5) comprises an I-shaped rear cover plate (51), one end of the I-shaped rear cover plate (51) being fixed with a rear cover plate end plate (52), and the rear cover plate end plate (52) being fixed on the box-shaped support structure (3).

9. The load-bearing mini truck body reinforced rear suspension structure according to claim 7, characterized in that: A rear cover lining plate (511) is arranged inside the X-shaped rear cover plate (51).

10. The load-bearing mini truck body reinforced rear suspension structure according to claim 1, characterized in that: The inner wall of the inner flange side plate (32) is fixed with a fitted inner lining plate (321), and the inner wall of the outer flange side plate (33) is fixed with a fitted outer lining plate (331).

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