Forward extending beam device of boundary beam type frame

Abstract

The utility model relates to the technical field of automobile chassis, in particular to a front extending beam device of a boundary beam type frame, which comprises a front cross beam device, the front cross beam device is provided with a left front extending beam and a right front extending beam, a front cross beam is arranged between the left front extending beam and the right front extending beam, the left front extending beam is arranged on a left longitudinal beam, and the right front extending beam is arranged on a right longitudinal beam. The right front extension beam is mounted on the right longitudinal beam; the front-end accessories of the frame are high in installation integration level, free of a transition support, simple in component, high in arrangement space utilization rate and high in assembly efficiency; the left front extension beam and the right front extension beam are of an integrally-formed structure made of high-performance materials, the whole structure is of a frame type design, mechanical topology reinforcing ribs are arranged between installation supporting faces and installation holes, local material reduction hollowed-out parts are matched, and the allowable performance of all the materials can be brought into full play. Compared with a traditional workshop longitudinal beam, the left front extension beam and the right front extension beam adopt the design that the upper wing surface sinks in the Z direction and the ventral surfaces of the left front extension beam and the right front extension beam are widened in the Y direction, and the arrangement applicability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile chassis, in particular to a forward extension beam device of a side beam type frame. Background Art

[0002] Commercial vehicle frames mainly include side beam type and center beam type, among which the side beam type is the most widely used. The side beam type frame is also called a ladder frame or array frame, which consists of two longitudinal beams on both sides and several cross beams, which are connected into a solid rigid frame by bolting, riveting or welding. Figure 1 shown.

[0003] The front end of the commercial vehicle frame is the concentrated area for the cab and engine installation. It needs to be equipped with various accessory devices such as cab suspension, cab flip, bumper, front protection, cooling module, steering gear, chassis suspension, etc. It has the characteristics of many types of connection brackets and high installation density. Figure 2 shown.

[0004] At present, the following problems are common in the front end of the frame: the front end of the frame has few integrated functions, and the cab front suspension, cab flip, front lower protection, bumper, cooling module, steering gear, chassis front suspension and other assemblies or systems need to be installed on the front end of the frame longitudinal beam through their own brackets, such as Figure 3 As shown. This results in a series of problems such as numerous parts at the front end of the frame, insufficient layout space, reduced assembly efficiency, increased weight and cost, etc. At the same time, as the installed power of engines in the commercial vehicle market gradually increases, it is necessary to match cooling modules with wider and higher dimensions to meet heat dissipation. At present, the front end of the straight-through frame longitudinal beam has no sinking amount, which is not conducive to layout and adjustment. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a front extension beam device suitable for a side beam type frame, which is used for highly integrated installation of vehicle accessories such as cab suspension, cab flipping, bumper, front lower protection, cooling module, steering gear, chassis suspension, etc., while facilitating the sunken layout requirements of the cab assembly, cooling module, etc.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a front extension beam device of a side beam type frame, including a front cross beam device, the front cross beam device is provided with a left front extension beam and a right front extension beam, a front cross beam is provided between the left front extension beam and the right front extension beam, the left front extension beam is installed on the left longitudinal beam, and the right front extension beam is installed on the right longitudinal beam.

[0007] Preferably, the upper wing front parts of the left front extension beam and the right front extension beam are both provided with a raised platform 1 for limiting the lower limit of the front suspension of the cab, and the raised platform 1 is provided with a mounting hole for the shock-absorbing cushion of the front suspension of the cab.

[0008] Preferably, a heightened structure is provided in the middle portion of the upper wing surface of the left front extension beam and the right front extension beam, a cab front suspension swing arm rear support mounting hole is provided at the top of the heightened structure, a cooling module suspension mounting hole is provided at the root of the heightened structure, and the heightened structure of the left front extension beam is provided with a steering gear auxiliary mounting hole.

[0009] Preferably, a cooling module auxiliary suspension mounting hole is provided in the middle of the lower wing surface of the left front extension beam and the right front extension beam.

[0010] Preferably, a fork-shaped protrusion is provided at the rear portion of the lower wing surface of the left front extension beam and the right front extension beam, and a front pin shaft mounting hole of the chassis front suspension is provided at the end of the fork-shaped protrusion.

[0011] Preferably, a raised platform 2 is provided in the middle of the outer side of the ventral surface of the left front extension beam, and a steering gear mounting hole is provided at the top of the raised platform 2; a raised platform 3 is provided at the rear of the outer side of the ventral surface of the right front extension beam, and an extending shaft is provided on the raised platform 3 for installing the lower articulated seat of the cab flip cylinder.

[0012] Preferably, the front end upper wing surfaces of the left front extension beam and the right front extension beam have a height difference of 10 to 80 mm in the height direction compared with the upper wing surfaces of the left longitudinal beam and the right longitudinal beam; the front end inner side surfaces of the left front extension beam and the right front extension beam are increased by at least 120 mm in the width direction compared with the inner side surfaces of the left longitudinal beam and the right longitudinal beam.

[0013] Preferably, a second cross beam is provided between the left longitudinal beam and the right longitudinal beam, and the second cross beam is a special-shaped flat tube beam.

[0014] Preferably, the front cross beam is a tubular structure, with connecting supports at both ends and an intermediate tube in the middle.

[0015] Preferably, a bumper assembly mounting hole and a front traction pin mounting hole are symmetrically provided at the front end of the connecting support.

[0016] The utility model has the following beneficial effects:

[0017] 1) The front-end accessories of the frame are highly integrated, no transition bracket is required, the components are streamlined, the layout space utilization is high, and the assembly efficiency is high;

[0018] 2) The left front extension beam and the right front extension beam are made of high-performance materials and are integrally formed. The overall design is frame-type. Mechanical topological reinforcement ribs are set between the mounting support surface and mounting holes, and local material reduction and hollowing are combined to give full play to the allowable performance of materials in various places.

[0019] 3) Compared with traditional workshop longitudinal beams, the left front extension beam and the right front extension beam adopt a design in which the upper wing surface is sunken in the Z direction and the Y-direction spacing of the belly surface of the left front extension beam and the right front extension beam is widened, which has better layout applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the prior art (I).

[0021] Figure 2 It is a structural schematic diagram of the prior art (II).

[0022] Figure 3 It is a structural schematic diagram of the prior art (three).

[0023] Figure 4 It is a structural schematic diagram of the front extension beam device of the utility model.

[0024] Figure 5 It is an assembly schematic diagram of the front extension beam device of the utility model.

[0025] Figure 6 Schematic diagram of the structure of the left front extension beam (I).

[0026] Figure 7 2 is a schematic diagram of the structure of the left front extension beam.

[0027] Figure 8 It is a structural schematic diagram of the right front extension beam.

[0028] Fig. 9 It is a structural diagram of the front crossbeam.

[0029] In the figure: 1-left front extension beam; 2-right front extension beam; 3-front cross beam; 4-front extension beam device; 5-left longitudinal beam of the frame; 6-right longitudinal beam of the frame; 7-second cross beam; 8-cross beam connecting support; 9-cross beam middle tube; 10-bumper assembly mounting hole; 11-front traction pin mounting hole; 12-raised platform one; 13-cab front suspension shock-absorbing cushion mounting hole; 14-raised structure; 15-cab front suspension swing arm rear support mounting hole; 16-steering gear auxiliary mounting hole; 17-raised platform two; 18-steering gear mounting hole; 19-cooling module suspension mounting hole; 20-cooling module auxiliary suspension mounting hole; 21-fork-shaped protrusion; 22-chassis front suspension front pin shaft mounting hole; 23-raised platform three; 24-extended shaft. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely further describe the technical solutions in the embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Example:

[0032] like Figure 4-9As shown, the front extension beam device 4 is mainly composed of a left front extension beam 1, a right front extension beam 2 and a front cross beam 3.

[0033] The front extension beam device 4, wherein the left front extension beam 1 is installed on the left longitudinal beam 5 of the side beam type frame, and the right front extension beam 2 is installed on the right longitudinal beam 6 of the side beam type frame, is fastened by bolt connection, and flange-faced toothed bolts and nuts are used, which have a good anti-loosening effect.

[0034] The front extension beam device 4, wherein the left front extension beam 1, the right front extension beam 2 and the front cross beam 3 are fastened by bolt connection, and flange-surface toothed bolts and nuts are used, which has a good anti-loosening effect.

[0035] The front extension beam device 4, wherein the left front extension beam 1 and the right front extension beam 2 are preferably but not limited to a symmetrical structure, may also be an asymmetrical state, the symmetrical state has interchangeability in chassis layout and installation for left- and right-hand drive vehicles, and the asymmetrical state is convenient for adapting to the layout requirements of special vehicles.

[0036] The front extension beam device 4 is matched with the second cross beam 7 to enhance the strength and rigidity of the front end of the frame.

[0037] The front extension beam device 4, wherein the left front extension beam 1, the right front extension beam 2, and the front cross beam 3 are preferably made of iron-based metal materials for ease of cost control, and may also be made of aluminum-based metal materials to obtain lighter weight and better anti-corrosion effect.

[0038] The left front extension beam 1 and the right front extension beam 2 are both processed by a pressure casting process, and can also be processed by a cold forming process such as milling.

[0039] The front cross beam 3 is a tubular cross beam, which is composed of connecting supports 8 at both ends and a horizontal middle tube 9. The connecting supports 8 and the middle tube 9 are preferably made of iron-based metal materials, and aluminum-based metal materials can also be used. The processing technology of the connecting supports 8 and the middle tube 9 is preferably but not limited to welding connection, and an integrated molding process can also be used to obtain better mechanical properties.

[0040] The second cross beam 7 is a special-shaped flat tube beam, which improves the performance of the frame and facilitates the layout of the engine and fan assembly, intake and exhaust and cooling pipelines.

[0041] Compared with the upper wing surfaces of the left longitudinal beam 5 and the right longitudinal beam 6 of the frame, the upper wing surfaces at the front ends of the left front extension beam 1 and the right front extension beam 2 have a height difference of 60 mm in the height direction (-Z direction) for a frame with a belly height of 280 mm, which is conducive to the layout of the cooling module of a high-horsepower engine.

[0042] The inner side surfaces (ventral inner sides) of the front ends of the left front extension beam 1 and the right front extension beam 2 are 130 mm larger in the width direction (Y direction) than the inner side surfaces (ventral inner sides) of the left longitudinal beam 5 and the right longitudinal beam 6 .

[0043] The front end of the connecting support 8 of the front cross beam 3 is symmetrically provided with bumper assembly mounting holes 10, which are 4×M12 threaded holes respectively, for bolting and fixing the bumper assembly; at the same time, front towing pin mounting holes 11 are symmetrically provided, which are M45 threaded holes for installing the front towing device.

[0044] A raised platform 12 is arranged at the front part (Z direction) of the upper wing of the left front extension beam 1 and the right front extension beam 2 for limiting the lower limit of the front suspension of the cab. The platform is provided with a mounting hole 13 for the front suspension shock-absorbing cushion of the cab, which is an M6 bolt hole for fixing the shock-absorbing cushion. The raised platform 12 adopts a structure with reduced material in the middle and partial hollowing.

[0045] A heightened structure 14 is arranged in the middle part (Z direction) of the upper wing surface of the left front extension beam 1 and the right front extension beam 2, and mounting holes 15 for the rear support of the front suspension swing arm of the cab are arranged on the top of the heightened structure 14, which are 2×Φ14.5mm through holes respectively and are used to fix the rear support of the front suspension swing arm of the cab; in addition, a steering gear auxiliary mounting hole 16 is arranged on the left front extension beam, which is a Φ20.5mm through hole, and is used to assist in the fixing of the steering gear; the heightened structure 14 adopts a rib partitioning, middle material reduction and partial hollowing structure.

[0046] Cooling module suspension mounting holes 19 are provided near the root of the upper wing middle (Z direction) heightening structure 14 of the left front extension beam 1 and the right front extension beam 2, which are 2×M12 threaded holes for fixing the cooling module suspension.

[0047] A cooling module auxiliary suspension mounting hole 20 is provided at the middle part (-Z direction) of the lower wing surface of the left front extension beam 1 and the right front extension beam 2. The hole is a Φ20.5 mm through hole and participates in the auxiliary fixing of the cooling module.

[0048] A fork-shaped protrusion 21 is provided at the rear (-Z direction) of the lower wing surface of the left front extension beam 1 and the right front extension beam 2. A chassis front suspension front pin shaft mounting hole 22 is provided at the end of the fork-shaped protrusion 21. The hole is a Φ30mm through hole for fixing the chassis front suspension front pin shaft. The fork-shaped protrusion 21 adopts a middle-part reduced-material structure.

[0049] A second elevated platform 17 is provided in the middle of the outer side (Y direction) of the belly surface of the left front extension beam 1, and a steering gear mounting hole 18 is provided on the top of the second elevated platform 17, which is a 3×M20 mounting hole for fixing the steering gear.

[0050] A raised platform 3 23 is arranged at the rear part of the outer side (Y direction) of the belly surface of the right front extension beam 2, and an extension shaft 24 is arranged on the raised platform 3 23 for installing the lower hinged seat of the cab tilting cylinder.

[0051] On the left front extension beam 1 and the right front extension beam 2, bosses are arranged around each mounting hole, and the mounting holes and the edges of the extension beams are connected by reinforcing ribs to form a mesh structure, which fully guarantees the mechanical properties of the load-bearing area and avoids the risk of cracking caused by stress concentration. On the left front extension beam 1 and the right front extension beam 2, the stress-strain analysis method is used to realize regional material reduction and hollow structure design, and at the same time, the thickness of the reinforcing ribs and the hollow area material is gradually changed to avoid stress concentration.

[0052] The present utility model is not limited to the above-mentioned implementation modes, and anyone should be aware of the structural changes made under the inspiration of the present utility model. Any technical solutions that are the same or similar to the present utility model fall within the protection scope of the present utility model.

[0053] The technology, shape and structure parts not described in detail in the present invention are all known technologies.

Claims

1. A front extension beam device of a side beam type frame, comprising a front cross beam device (4), characterized in that: The front cross beam device (4) is provided with a left front extension beam (1) and a right front extension beam (2), a front cross beam (3) is provided between the left front extension beam (1) and the right front extension beam (2), the left front extension beam (1) is mounted on the left longitudinal beam (5), and the right front extension beam (2) is mounted on the right longitudinal beam (6).

2. The front extension beam device of the side beam type frame according to claim 1, characterized in that: The upper wing front parts of the left front extension beam (1) and the right front extension beam (2) are both provided with a raised platform (12) for limiting the lower limit of the front suspension of the cab, and the raised platform (12) is provided with a mounting hole (13) for the shock-absorbing cushion of the front suspension of the cab.

3. The front extension beam device of the side beam type frame according to claim 1, characterized in that: The left front extension beam (1) and the right front extension beam (2) are both provided with a heightened structure (14) in the middle of the upper wing surface, the top of the heightened structure (14) is provided with a cab front suspension swing arm rear support mounting hole (15), the root of the heightened structure (14) is provided with a cooling module suspension mounting hole (19), wherein the heightened structure (14) of the left front extension beam (1) is provided with a steering gear auxiliary mounting hole (16).

4. The front extension beam device of the side beam type frame according to claim 1, characterized in that: A cooling module auxiliary suspension mounting hole (20) is provided in the middle of the lower wing surface of the left front extension beam (1) and the right front extension beam (2).

5. The front extension beam device of the side beam type frame according to claim 1, characterized in that: A fork-shaped protrusion (21) is arranged at the rear of the lower wing surface of the left front extension beam (1) and the right front extension beam (2), and a front pin shaft mounting hole (22) of the chassis front suspension is arranged at the end of the fork-shaped protrusion (21).

6. The front extension beam device of the side beam type frame according to claim 1, characterized in that: A second raised platform (17) is provided at the middle of the outer side of the belly surface of the left front extension beam (1), and a steering gear mounting hole (18) is provided at the top of the second raised platform (17); a third raised platform (23) is provided at the rear of the outer side of the belly surface of the right front extension beam (2), and a protruding shaft (24) is provided on the third raised platform (23) for mounting the lower hinge seat of the cab tilting cylinder.

7. The front extension beam device of the side beam type frame according to claim 1, characterized in that: The front end upper wing surfaces of the left front extension beam (1) and the right front extension beam (2) have a height difference of 10 to 80 mm in the height direction compared with the upper wing surfaces of the left longitudinal beam (5) and the right longitudinal beam (6); the front end inner side surfaces of the left front extension beam (1) and the right front extension beam (2) have a width increase of at least 120 mm compared with the inner side surfaces of the left longitudinal beam (5) and the right longitudinal beam (6).

8. The front extension beam device of the side beam type frame according to claim 1, characterized in that: A second cross beam (7) is also provided between the left longitudinal beam (5) and the right longitudinal beam (6), and the second cross beam (7) is a special-shaped flat tube beam.

9. The front extension beam device of the side beam type frame according to claim 1, characterized in that: The front cross beam (3) is a tubular structure, with connecting supports (8) at both ends and an intermediate tube (9) in the middle.

10. The front extension beam device of the side beam type frame according to claim 9, characterized in that: The front end of the connecting support (8) is symmetrically provided with a bumper assembly mounting hole (10) and a front traction pin mounting hole (11).

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