Lightweight dumper frame structure

Abstract

The utility model discloses a light-weight dumper frame structure, and belongs to the technical field of automobile frames. The device comprises two longitudinal beams which are arranged at an interval, the front plate spring is arranged on the front side of the longitudinal beam, and a rear support and a front support of the front plate spring are connected with the longitudinal beam through connecting pieces; a tubular cross beam assembly, a second cross beam assembly, a third cross beam assembly and a middle cross beam assembly are sequentially connected between the two longitudinal beams. Wherein the two ends of the tubular cross beam assembly and the front support share the connecting pieces and are connected with the longitudinal beams; the two ends of the second cross beam assembly and the rear support share the connecting pieces to be connected with the longitudinal beams. The middle cross beam assembly is provided with a middle cross beam lower connecting plate, the middle cross beam lower connecting plate extends towards the third cross beam assembly, and the middle cross beam lower connecting plate and the third cross beam assembly share the connecting piece so that the middle cross beam lower connecting plate can be connected with the longitudinal beam.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile frames, in particular to a lightweight dump truck frame structure applied to an 8×4 lightweight dump truck frame system. Background Art

[0002] At present, the lightweighting of automobiles is to reduce the curb weight of the automobile as much as possible while ensuring the strength and safety performance of the automobile, thereby improving the operating efficiency of the vehicle and reducing fuel consumption.

[0003] Among them, the frame is an important part of the automobile chassis. It not only bears the weight of various chassis assemblies, the body and the cargo on the vehicle, but also withstands various impacts transmitted from the engine vibration, vehicle load and the ground during the vehicle's driving. It has an important impact on the vehicle's handling stability and safety.

[0004] The frame structure of lightweight dump trucks in the prior art is mostly a traditional reinforced frame, which has the problems of heavy weight and excessive use of materials, resulting in problems such as large vehicle curb weight, excessive use of materials, and poor fuel economy.

[0005] Secondly, the frame of the lightweight dump truck in the prior art has insufficient overload capacity and weak local strength, and there is a problem of local fatigue cracking of the frame during use. Utility Model Content

[0006] The purpose of the utility model is to overcome the defects of the prior art and provide a novel lightweight dump truck frame structure. The structure is optimized on the basis of the existing lightweight frame, so that the strength of the weak positions of the frame is effectively improved, and the purpose of lightweighting the vehicle is achieved while ensuring the overall strength of the frame.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] The utility model discloses a lightweight dump truck frame structure, comprising:

[0009] two longitudinal beams arranged at intervals;

[0010] A front leaf spring is arranged at the front side of the longitudinal beam, and the rear support and the front support of the front leaf spring are connected to the longitudinal beam through a connecting member, characterized in that;

[0011] A tubular crossbeam assembly, a second crossbeam assembly, a third crossbeam assembly and an intermediate crossbeam assembly are sequentially connected between the two longitudinal beams;

[0012] Wherein, the two ends of the tubular cross beam assembly and the front support share the connecting piece and are connected to the longitudinal beam;

[0013] The two ends of the cross beam assembly and the rear support share the connecting piece and are connected to the longitudinal beam;

[0014] The middle cross beam assembly has a middle cross beam lower connecting plate, which extends toward the cross beam assembly three and shares the connecting piece with the cross beam assembly three so as to be connected with the longitudinal beam.

[0015] Furthermore, the tubular crossbeam assembly includes a tubular crossbeam connecting plate and a tubular crossbeam, the two ends of the tubular crossbeam are fixedly connected with the tubular crossbeam connecting plate, and the tubular crossbeam connecting plate is connected with the front support by sharing the connecting piece.

[0016] Further, the second crossbeam assembly comprises a second crossbeam upper connecting plate, a second crossbeam lower connecting plate and a second crossbeam, the upper portions of both ends of the second crossbeam are fixedly connected to the second crossbeam upper connecting plate, and the lower portions of both ends of the second crossbeam are fixedly connected to the second crossbeam lower connecting plate;

[0017] Among them, the second upper connecting plate of the cross beam has a bending section extending downward, the bending section is fixedly connected to the second lower connecting plate of the cross beam assembly, and the bending section is connected to the rear support by sharing the connecting piece.

[0018] Further, the crossbeam assembly three includes a crossbeam three upper connecting plate, a crossbeam three lower connecting plate and a crossbeam three;

[0019] The upper surfaces of both ends of the cross beam 3 are fixedly connected to the upper connecting plates of the cross beam 3, and the lower surfaces of both ends are fixedly connected to the lower connecting plates of the cross beam 3;

[0020] The middle crossbeam assembly comprises an upper connecting plate of the middle crossbeam, a lower connecting plate of the middle crossbeam and the middle crossbeam;

[0021] The upper surfaces of both ends of the middle cross beam are fixedly connected to the middle cross beam upper connecting plates, and the lower surfaces of both ends are fixedly connected to the middle cross beam lower connecting plates;

[0022] Wherein, the lower connecting plate of the middle cross beam is located at an extension section formed on three sides of the cross beam and is connected to the three lower connecting plates of the cross beam through a common connecting piece.

[0023] Furthermore, the connecting piece is a bolt or a rivet.

[0024] Furthermore, it also includes a first crossbeam assembly, which is arranged between the tubular crossbeam assembly and the second crossbeam assembly; and

[0025] A movable crossbeam assembly disposed at the front end of the longitudinal beam and a rear crossbeam assembly disposed at the rear end of the longitudinal beam;

[0026] The movable crossbeam assembly, the first crossbeam assembly and the rear crossbeam assembly are all connected to the longitudinal beam via the connecting piece.

[0027] Furthermore, the front leaf springs include two groups, wherein the front support of one group of the front leaf springs is connected to the tubular cross beam assembly via a common connecting piece, and the rear support of the other group of the front leaf springs is connected to the second cross beam assembly via a common connecting piece.

[0028] Furthermore, outer connecting plates are fixedly connected to the outer sides of the longitudinal beams at positions corresponding to the intermediate cross beam assemblies.

[0029] In the above technical solution, the utility model provides a lightweight dump truck frame structure, which has the following beneficial effects compared with the prior art:

[0030] 1) Under torsional conditions, the dump truck frame is prone to fatigue failure in the area near the leaf spring support. After the crossbeam assembly and the leaf spring support are connected with common bolts, part of the frame torsional force is transmitted to the frame longitudinal beam through the crossbeam, which plays an important role in improving the torsional strength of the frame assembly.

[0031] Through CAE finite element analysis of the frame assembly, after the tubular crossbeam assembly 2 is connected with the front support 12 by common bolts, the strength of this area of ​​the frame under torsion conditions is increased by about 5%; after the crossbeam assembly 2 is connected with the rear support 11 by common bolts, the strength of this area of ​​the frame under torsion conditions is increased by about 40%;

[0032] 2) The area between the middle cross beam assembly 7 and the cross beam assembly three 6 is near the center of mass of the dump truck cargo. During the lifting process of the cargo box, the force here is relatively large, and it is an area where the frame is prone to fatigue failure. After the lower connecting plate 22 of the middle cross beam is extended forward and connected with the cross beam assembly three 6 by common bolts, it plays an important role in improving the bending strength of the frame assembly;

[0033] Through CAE finite element analysis of the frame assembly, after the middle crossbeam lower connecting plate 22 is extended forward and connected with the crossbeam assembly three 6 by common bolts, the strength of this area of ​​the frame under bending conditions is increased by about 30%;

[0034] The lightweight dump truck frame structure of this practical design effectively optimizes the frame, effectively improves the strength of the weak positions of the frame, and achieves the purpose of lightweighting the vehicle while ensuring the overall strength of the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0036] Figure 1This is a schematic diagram of the overall structure of a lightweight dump truck frame structure disclosed by the utility model;

[0037] Figure 2 This is a schematic diagram of a tubular crossbeam assembly and a crossbeam assembly structure and an assembly relationship of a lightweight dump truck frame structure disclosed by the utility model;

[0038] Figure 3 The utility model discloses a light-weight dump truck frame structure crossbeam assembly three, a middle crossbeam assembly structure and an assembly relationship schematic diagram.

[0039] Description of reference numerals:

[0040] 1- movable crossbeam assembly; 2- tubular crossbeam assembly; 3- first longitudinal beam; 4- crossbeam assembly one; 5- crossbeam assembly two; 6- crossbeam assembly three; 7- middle crossbeam assembly; 8- rear crossbeam assembly; 9- outer connecting plate; 10- second longitudinal beam; 11- rear support of front leaf spring; 12- front support of front leaf spring; 13- tubular crossbeam connecting plate; 14- tubular crossbeam; 15- upper connecting plate of crossbeam two; 16- lower connecting plate of crossbeam assembly two; 17- crossbeam two; 18- upper connecting plate of crossbeam three; 19- lower connecting plate of crossbeam three; 20- crossbeam three; 21- upper connecting plate of middle crossbeam; 22- lower connecting plate of middle crossbeam; 23- middle crossbeam. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0042] See also Figure 1 As shown;

[0043] The utility model discloses a lightweight dump truck frame structure, comprising:

[0044] Two longitudinal beams are arranged at intervals, a first longitudinal beam 3 and a second longitudinal beam 10, two groups of front leaf springs are arranged on the front sides of the first longitudinal beam 3 and the second longitudinal beam 10, and the rear support 11 and the front support 12 of the front leaf spring are connected to the longitudinal beam through a connecting piece; and further comprising

[0045] The movable crossbeam assembly 1, the tubular crossbeam assembly 2, the crossbeam assembly 1 4, the crossbeam assembly 2 5, the crossbeam assembly 3 6, the middle crossbeam assembly 7, and the rear crossbeam assembly 8 are sequentially arranged between the two longitudinal beams. The connection between the components is connected by connecting parts. Specifically, the connecting parts are bolts or rivets. This embodiment only takes bolts as an example.

[0046] like Figure 2 As shown, the tubular cross beam assembly 2 includes a tubular cross beam connecting plate 13 and a tubular cross beam 14. The tubular cross beam 14 has the tubular cross beam connecting plate 13 fixedly connected to both ends. Front support 12Common bolt connection.

[0047] The second crossbeam assembly 5 includes a second crossbeam upper connecting plate 15, a second crossbeam assembly lower connecting plate 16, and a second crossbeam 17;

[0048] The upper parts of both ends of the crossbeam 17 are fixedly connected to the upper connecting plate 15 of the crossbeam 2, and the lower parts of both ends of the crossbeam 17 are fixedly connected to the lower connecting plate 16 of the crossbeam assembly 2, wherein the upper connecting plate 15 of the crossbeam 2 has a bending section extending downward, the bending section is fixedly connected to the lower connecting plate 16 of the crossbeam assembly 2, and the bending section is connected to the rear support 11 by a common bolt.

[0049] like Figure 3 As shown, the crossbeam assembly three 6 includes a crossbeam three upper connecting plate 18, a crossbeam three lower connecting plate 19, and a crossbeam three 20; the middle crossbeam assembly 7 includes a middle crossbeam upper connecting plate 21, a middle crossbeam lower connecting plate 22, and a middle crossbeam 23.

[0050] The upper surfaces of both ends of the cross beam 20 are fixedly connected with the upper connecting plates 18 of the cross beam, and the lower surfaces of both ends are fixedly connected with the lower connecting plates 19 of the cross beam;

[0051] The upper surfaces of both ends of the middle crossbeam 23 are fixedly connected with the middle crossbeam upper connecting plates 21, and the lower surfaces of both ends are fixedly connected with the middle crossbeam lower connecting plates 22, wherein the middle crossbeam lower connecting plate 22 is located at the extension section formed on the side of the crossbeam three 20 and is connected with the crossbeam three lower connecting plate 19 by a common connecting piece.

[0052] See also Figure 1 As shown, the crossbeam assembly 1 4 of the lightweight dump truck frame structure is arranged between the tubular crossbeam assembly 2 and the crossbeam assembly 2 5, the front end of the longitudinal beam is fixedly connected with the movable crossbeam assembly 1, the rear end of the longitudinal beam is fixedly connected with the rear crossbeam assembly 8, and the movable crossbeam assembly 1, the crossbeam assembly 1 4 and the rear crossbeam assembly 8 are also connected to the longitudinal beam by bolts.

[0053] When the lightweight dump truck frame structure is in torsional condition, fatigue failure is prone to occur in the area near the leaf spring support. After the crossbeam assembly and the leaf spring support are connected with common bolts, part of the frame torsional force is transmitted to the frame longitudinal beam through the crossbeam, which plays an important role in improving the torsional strength of the frame assembly.

[0054] By performing CAE finite element analysis on the frame assembly, it was found that after the tubular crossbeam assembly 2 was connected to the front support 12 with a common bolt, the strength of this area of ​​the frame under torsion conditions was increased by about 5%; after the crossbeam assembly 2 5 was connected to the rear support 11 with a common bolt, the strength of this area of ​​the frame under torsion conditions was increased by about 40%.

[0055] The area between the middle crossbeam assembly 7 and the crossbeam assembly three 6 is near the center of mass of the dump truck's cargo. During the lifting process of the cargo box, the force here is relatively large, and it is an area where the frame is prone to fatigue failure. After the lower connecting plate 22 of the middle crossbeam is extended forward and connected with the crossbeam assembly three 6 using common bolts, it plays an important role in improving the bending strength of the frame assembly.

[0056] Through CAE finite element analysis of the frame assembly, it was found that after the lower connecting plate 22 of the middle cross beam was extended forward and connected with the three common bolts of the cross beam assembly 6, the strength of this area of ​​the frame under bending conditions was increased by about 30%.

[0057] The lightweight dump truck frame structure of this practical design effectively optimizes the frame, effectively improves the strength of the weak positions of the frame, and achieves the purpose of lightweighting the vehicle while ensuring the overall strength of the frame.

[0058] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A lightweight dump truck frame structure, comprising: two longitudinal beams arranged at intervals; A front leaf spring is arranged on the front side of the longitudinal beam, wherein the rear support (11) and the front support (12) of the front leaf spring are connected to the longitudinal beam via a connecting member, and is characterized in that; A tubular crossbeam assembly (2), a second crossbeam assembly (5), a third crossbeam assembly (6) and an intermediate crossbeam assembly (7) are sequentially connected between the two longitudinal beams; Wherein, the two ends of the tubular cross beam assembly (2) and the front support (12) share the connecting piece and are connected to the longitudinal beam; The two ends of the second cross beam assembly (5) and the rear support (11) share the connecting piece and are connected to the longitudinal beam; The middle cross beam assembly (7) has a middle cross beam lower connecting plate (22), which extends toward the third cross beam assembly (6) and shares the connecting piece with the third cross beam assembly (6) so as to be connected to the longitudinal beam.

2. A lightweight dump truck frame structure according to claim 1, characterized in that ； The tubular cross beam assembly (2) comprises a tubular cross beam connecting plate (13) and a tubular cross beam (14), the two ends of the tubular cross beam (14) are fixedly connected to the tubular cross beam connecting plate (13), and the tubular cross beam connecting plate (13) is connected to the front support (12) by sharing the connecting piece.

3. A lightweight dump truck frame structure according to claim 1, characterized in that; The second crossbeam assembly (5) comprises a second crossbeam upper connecting plate (15), a second crossbeam lower connecting plate (16) and a second crossbeam (17), the upper portions of both ends of the second crossbeam (17) are fixedly connected to the second crossbeam upper connecting plate (15), and the lower portions of both ends of the second crossbeam (17) are fixedly connected to the second crossbeam lower connecting plate (16); The second upper connecting plate (15) of the cross beam has a bending section extending downward, the bending section is fixedly connected to the second lower connecting plate (16) of the cross beam assembly, and the bending section is connected to the rear support (11) by sharing the connecting piece.

4. A lightweight dump truck frame structure according to claim 1, characterized in that; The crossbeam assembly three (6) comprises a crossbeam three upper connecting plate (18), a crossbeam three lower connecting plate (19) and a crossbeam three (20); The upper surfaces of both ends of the cross beam 3 (20) are fixedly connected to the upper cross beam 3 connecting plates (18), and the lower surfaces of both ends are fixedly connected to the lower cross beam 3 connecting plates (19); The intermediate crossbeam assembly (7) comprises an intermediate crossbeam upper connecting plate (21), an intermediate crossbeam lower connecting plate (22) and an intermediate crossbeam (23); The upper surfaces of both ends of the middle cross beam (23) are fixedly connected to the middle cross beam upper connecting plates (21), and the lower surfaces of both ends are fixedly connected to the middle cross beam lower connecting plates (22); Wherein, the middle crossbeam lower connecting plate (22) is located at the extension section formed on the side of the crossbeam three (20) and is connected to the crossbeam three lower connecting plate (19) by a common connecting piece.

5. The lightweight dump truck frame structure according to claim 1 is characterized in that ； The connecting piece is a bolt or a rivet.

6. A lightweight dump truck frame structure according to any one of claims 1 to 5, characterized in that ； It also includes a first crossbeam assembly (4), which is arranged between the tubular crossbeam assembly (2) and the second crossbeam assembly (5); and A movable crossbeam assembly (1) disposed at the front end of the longitudinal beam and a rear crossbeam assembly (8) disposed at the rear end of the longitudinal beam; The movable crossbeam assembly (1), the crossbeam assembly 1 (4) and the rear crossbeam assembly (8) are all connected to the longitudinal beam via the connecting piece.

7. A lightweight dump truck frame structure according to claim 6, characterized in that ； The front leaf springs include two groups, wherein the front support (12) of one group of the front leaf springs is connected to the tubular cross beam assembly (2) by sharing the connecting piece, and the rear support (11) of the other group of the front leaf springs is connected to the second cross beam assembly (5) by sharing the connecting piece.

8. A lightweight dump truck frame structure according to any one of claims 1 to 5, characterized in that ； An outer connecting plate (9) is fixedly connected to the outer side of the longitudinal beam at a position corresponding to the intermediate cross beam assembly (7).

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