Front connecting beam of heavy truck

Abstract

The utility model discloses a front connecting beam of a heavy truck, which adopts an integral casting structural design, effectively improves the reliability and the stability of the whole truck, and fully applies a lightweight integrated design and manufacturing technology. Multiple functions of traction, U-shaped bumper assembly installation, front lower protection installation, cab front support installation, cab lifting oil cylinder installation, boarding pedal installation, plate spring support fixation, water tank fixation, steering gear installation and the like are effectively integrated, the number of parts is effectively reduced, and compared with products with the same functions assembled in an overlapped mode, the total weight is obviously reduced, and the cost is reduced. The assembly time is greatly shortened, the functional density of the front connecting beam is remarkably improved through the three-dimensional layout, the problem of space conflict of a traditional structure is solved, the replacement time of a single component is greatly shortened through the modular design, the use amount of connecting pieces is reduced, and the cost is reduced. And multiple benefits of reducing the self weight of the vehicle, reducing the cost of the whole vehicle and the subsequent vehicle cost and the like are brought to a whole vehicle factory and a terminal user.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile parts, and relates to the structure and process lightweight integrated development of an automobile front end module, in particular to a heavy truck front connecting beam. BACKGROUND

[0002] In the heavy truck manufacturing field, the front connecting beam, as a key structural part connecting the frame longitudinal beam, bears multiple functions such as installation of the steering system, the cooling system, the cab lifting mechanism, the front suspension and the protection device. However, the traditional front connecting beam design scheme on the market generally adopts a split type welding structure or a multi-component bolt assembly mode, which has the following technical defects:

[0003] 1. Heavy structure, difficult to lighten: The traditional scheme is usually assembled by bolts or welding from multiple independent functional supports (such as a steering gear support, a cooling water tank support, a lifting oil cylinder support, etc.), resulting in a redundant overall structure and a large weight. Since each component needs to meet the strength requirement individually, the material utilization rate is low, and it is difficult to achieve effective lightweight design, affecting the fuel economy and load capacity of the whole vehicle.

[0004] 2. Single function, low integration: Each small support of the existing front connecting beam is usually designed for a single function (such as only installing a steering gear or only fixing a bumper), resulting in a large number of components (usually 10-15 independent components are needed). This decentralized layout not only occupies a large space, but also easily causes mutual interference of each system installation position, increasing the overall layout difficulty.

[0005] 3. Complex assembly, low efficiency: Since multiple components are assembled in a split mode, the traditional scheme needs multiple positioning and fastening on the vehicle production line, with complicated assembly procedures and an increased average time consumption of 30%-50%. At the same time, too many bolt connection points (usually more than 50) are prone to loosening, affecting long-term reliability.

[0006] 4. Long development cycle, high cost: Each functional support needs to be designed, molded and verified independently, resulting in a prolonged development cycle (usually 6-8 months are needed). In addition, the multi-variety small-batch production mode increases the mold investment and management cost, and it is difficult to achieve platform compatibility.

[0007] 5. Inconvenient maintenance, insufficient reliability: The split type structure is prone to welding fatigue cracking or bolt loosening after long-term use, and multiple associated components need to be disassembled for maintenance, with high maintenance cost. Under vibration conditions, micro-motion wear is easily generated between the supports, shortening the service life. INVENTION CONTENTS

[0008] The utility model proposes a heavy truck front connecting beam which adopts an integrated overall casting structure to provide a solution for reducing varieties, fast assembly, reducing the weight of the whole vehicle, reducing the cost of the whole vehicle, improving the competitiveness of the whole vehicle and reducing the daily use cost of the terminal user for the vehicle factory.

[0009] The purpose of the utility model can be realized by the following technical solutions:

[0010] A heavy truck front connecting beam comprises an integrally formed base plate, an L-shaped lug, a side plate, a U-shaped plate, an extension plate and two symmetrically arranged strip-shaped plates, a first mounting area is arranged on the base plate to mount the front connecting beam on a vehicle frame longitudinal beam;

[0011] The L-shaped lug and the side plate are arranged along the top edge of the base plate, the L-shaped lug protrudes to one side of the base plate, the top surface of the L-shaped lug is provided with a steering gear assembly transition plate mounting position, the side surface of the L-shaped lug is provided with a cooling water tank mounting position and a cab lifting oil cylinder mounting position, the side plate is perpendicularly connected with the base plate, and the side plate is provided with a cab turnover support mounting position;

[0012] The U-shaped plate and the extension plate are arranged along the bottom edge of the base plate, the U-shaped plate protrudes to the other side of the base plate, a leaf spring mounting cavity is formed between the two side plates of the U-shaped plate, the top plate of the U-shaped plate is provided with a second mounting area to connect the front connecting beam with the lower end surface of the vehicle frame, the extension plate is horizontally connected with the base plate, and the extension plate is provided with a front lower protection assembly mounting position and an upper vehicle step support mounting position;

[0013] The two strip-shaped plates are perpendicularly connected with the side edges of the base plate, and the two strip-shaped plates are combined to form a U-shaped bumper assembly mounting position.

[0014] Further, a column body connected between the two strip-shaped plates is further included, one end of the column body is connected with the base plate, the other end is provided with a front trailer hook mounting position, and the two strip-shaped plates are connected on the side wall of the column body.

[0015] Further, ten first threaded holes corresponding to the hole positions on the vehicle frame longitudinal beam are formed in the first mounting area of the base plate, so that the front connecting beam is fixedly connected on the vehicle frame longitudinal beam through bolts.

[0016] Further, the top surface of the L-shaped lug is provided with four second threaded holes corresponding to the upper hole positions of the steering gear assembly transition plate, so that the steering gear assembly is fixedly connected on the front connecting beam through bolts, the side surface of the L-shaped lug is provided with two third threaded holes corresponding to the upper hole positions of the cooling water tank and four fourth threaded holes corresponding to the upper hole positions of the cab lifting oil cylinder, so that the cooling water tank and the cab lifting oil cylinder are fixedly connected on the front connecting beam through bolts, respectively.

[0017] Further, the side plate is provided with four tenth threaded holes corresponding to the upper hole positions of the cab turnover support, so that the cab turnover support is fixedly connected on the front connecting beam through bolts.

[0018] Further, the second mounting area of the top plate of the U-shaped plate is provided with two fifth threaded holes corresponding to the hole positions on the lower end surface of the frame, so that the front connecting beam is connected and fixed with the lower end surface of the frame, one side plate of the U-shaped plate is provided with a sixth threaded hole, and the other side plate is provided with a through hole, so that the leaf spring is connected between the two side plates through the pin shaft in the through hole and is fastened through the bolt in the sixth threaded hole.

[0019] Further, the extension plate is provided with two seventh threaded holes corresponding to the hole positions of the front lower protection assembly and two eighth threaded holes corresponding to the hole positions of the upper vehicle step support, so that the front lower protection assembly and the upper vehicle step support are respectively fixed and connected on the front connecting beam through the bolts.

[0020] Further, the two strip-shaped plates are respectively provided with four ninth threaded holes corresponding to the hole positions on the upper and lower end surfaces of the U-shaped bumper assembly, so that the U-shaped bumper is fixed and connected on the front connecting beam through the bolts.

[0021] Further, the column body is coaxially provided with a traction hole matched with the front trailer hook, so that the front trailer hook is installed on the front connecting beam.

[0022] Further, the middle part of the first mounting area of the base plate and between the L-shaped lug and the strip-shaped plate are provided with a hollow structure, and the extension plate and the U-shaped plate are both provided with a hollow structure.

[0023] Further, the L-shaped lug is provided as a hollow shell structure, the protruding side of which forms a mounting surface, and the back side forms a weight-reducing groove.

[0024] The heavy truck front connecting beam has the advantages that: the heavy truck front connecting beam is designed in an integrated casting structure, the reliability and stability of the whole vehicle are effectively improved, the design and manufacturing technology of lightweight integration are fully applied, the functions of traction, U-shaped bumper assembly installation, front lower protection installation, cab front support installation, cab lifting oil cylinder installation, upper vehicle pedal installation, leaf spring support fixation, water tank fixation, and steering device installation are effectively integrated, the number of parts is effectively reduced, the total weight is significantly reduced compared with the products with the same functions, the assembly time is greatly shortened, the functional density of the front connecting beam is significantly improved through three-dimensional layout, the problem of space conflict of the traditional structure is solved, the replacement time of a single part is greatly shortened through modular design, the use amount of connecting pieces is reduced, and multiple benefits such as reducing the vehicle self weight, reducing the whole vehicle cost and subsequent vehicle cost, and the like are brought to the whole vehicle factory and terminal users. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 It is a structural schematic view of the utility model.

[0026] Fig. 2 It is a structural schematic view of the utility model.

[0027] Fig. 3 This is a schematic diagram of the installation of this utility model. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figs. 1-3 As shown, this utility model provides a front connecting beam for heavy trucks, including: an integrally formed base plate 1, an L-shaped protrusion 2, a side plate 3, a U-shaped plate 4, an extension plate 5, and two symmetrically arranged strip plates 6. The base plate 1 has a first mounting area for mounting the front connecting beam on the longitudinal beam of the vehicle frame. The L-shaped protrusion 2 and the side plate 3 are both arranged along the top edge of the base plate 1. The L-shaped protrusion 2 protrudes to one side of the base plate 1. The top surface of the L-shaped protrusion 2 has a steering gear assembly transition plate mounting position. The side surface of the L-shaped protrusion 2 has a cooling water tank mounting position and a cab lifting cylinder mounting position. The side plate 3 is perpendicularly connected to the base plate 1 and has a cab tilting bracket mounting position. Both the U-shaped plate 4 and the extension plate 5 are arranged along the bottom edge of the base plate 1. The U-shaped plate 4 protrudes to the other side of the base plate 1, forming a leaf spring mounting cavity between the two side plates of the U-shaped plate 4. A second mounting area is provided on the top plate of the U-shaped plate 4 to connect the front connecting beam to the lower end face of the vehicle frame. The extension plate 5 is horizontally connected to the base plate 1 and has a front lower protection assembly mounting position and an upper step bracket mounting position. Both strip plates 6 are vertically connected to the side edge of the base plate 1, and the two strip plates 6 are combined to form a U-shaped bumper assembly mounting position. A column 7 is provided between the two strip plates 6. One end of the column 7 is connected to the base plate 1, and the other end has a front tow hook mounting position. Both strip plates 6 are connected to the side wall of the column 7.

[0030] The whole front beam uses high-strength and high-toughness nodular cast iron material according to integrated casting structure design, eliminates the welding stress concentration point, greatly improves the overall stiffness, and fully applies the lightweight integrated design and manufacturing technology, effectively integrates the traction, U-shaped bumper assembly installation, front lower protection installation, cab front support installation, cab lifting cylinder installation, upper step installation, leaf spring support fixation, water tank fixation, steering gear installation and other functions, reduces the number of parts, greatly reduces the assembly time, significantly improves the functional density of the front beam, solves the space conflict problem of the traditional structure, and greatly shortens the replacement time of the single part, reduces the use amount of connecting parts, and significantly reduces the manufacturing cost of the single part, thereby bringing multiple benefits such as reducing the vehicle weight, reducing the vehicle cost and subsequent vehicle cost for the vehicle manufacturer and end user, and the integrated overall casting structure can effectively improve the reliability and stability of the vehicle, and the total weight of the product is reduced by more than 100 kg per vehicle, and the weight reduction rate is more than 50%.

[0031] Ten first threaded holes 11 corresponding to the hole positions on the frame longitudinal beam are arranged on the first mounting area of the base plate 1, so as to fix and connect the front beam on the frame longitudinal beam through bolts. The distribution of multiple bolts makes the joint surface pressure uniform, and the loosening probability under vibration conditions is reduced. The hole position layout is compatible with mainstream frame longitudinal beam specifications, and the symmetrical hole position design supports rapid positioning and installation.

[0032] The top surface of the L-shaped protrusion 2 is provided with four second threaded holes 21 corresponding to the hole positions on the transition plate of the steering gear assembly, so as to fix and connect the steering gear assembly on the front beam through bolts. The side surface of the L-shaped protrusion 2 is provided with two third threaded holes 22 corresponding to the hole positions on the cooling water tank and four fourth threaded holes 23 corresponding to the hole positions on the cab lifting oil cylinder, so as to respectively fix and connect the cooling water tank and the cab lifting oil cylinder on the front beam through bolts. The single part simultaneously meets the installation requirements of the steering system, the cooling system and the cab lifting system. The cooling water tank installation position forms an optimal convection channel with the engine compartment. The installation positions of various systems are arranged in layers, and the maintenance space is increased.

[0033] Two fifth threaded holes 41 corresponding to the hole positions on the lower end surface of the frame are arranged on the second mounting area of the top plate of the U-shaped plate 4, so as to connect and fix the front beam and the lower end surface of the frame. The sixth threaded hole 42 is arranged on one side plate of the U-shaped plate 4, and the through hole 43 is arranged on the other side plate. The leaf spring is connected between the two side plates through the pin shaft in the through hole 43 and is fastened through the bolt in the sixth threaded hole 42. The displacement amount of the leaf spring is greatly reduced by adopting the double fixation of the pin shaft and the bolt. The U-shaped cavity design allows the leaf spring to swing by an angle of 15° at most, and the through hole guide design greatly shortens the installation time of the leaf spring.

[0034] The four tenth threaded holes 31 corresponding to the hole positions on the cab rollover support are arranged on the side plate 3, so as to fix and connect the cab rollover support on the front connecting beam by bolts. The two seventh threaded holes 51 corresponding to the hole positions on the front lower protection assembly and the two eighth threaded holes 52 corresponding to the hole positions on the upper vehicle step support are arranged on the extension plate 5, so as to fix and connect the front lower protection assembly and the upper vehicle step support on the front connecting beam by bolts respectively. The four ninth threaded holes 61 corresponding to the upper and lower end face hole positions of the U-shaped bumper assembly are arranged on the two strip-shaped plates 6 respectively, so as to fix and connect the U-shaped bumper on the front connecting beam by bolts. Eight-point fixing makes the impact resistance of the bumper reach 50kJ, and the modular design reduces the replacement cost of the bumper, and the installation position supports various bumper modeling modification.

[0035] The traction hole 71 coaxial with the front trailer hook is arranged on the column body 7, so as to install the front trailer hook on the front connecting beam. M36 threads are adopted in the traction hole 71, so as to meet the static traction requirement of 100kN. The self-locking thread structure is adopted to improve the holding force under vibration conditions. Meanwhile, the threaded hole can be used as a rescue equipment fixing point.

[0036] The hollow structure is arranged between the middle part of the first mounting area on the base plate 1 and the strip-shaped plate 6 and between the L-shaped lug 2 and the strip-shaped plate 6. The hollow structure is arranged on the extension plate 5 and the U-shaped plate 4. The overall weight of the front connecting beam is greatly reduced without affecting the strength. The hollow structure can also improve the heat dissipation efficiency of the key components and save the cost of raw materials. The L-shaped lug 2 is arranged in a hollow shell structure. The protruding side forms a mounting surface, and the back side forms a weight reduction groove. The weight of the lug area is greatly reduced. The space of the weight reduction groove can also be arranged with a wire harness or a sensor, so as to further improve the function expansion of the front connecting beam.

[0037] The above content is only an example and description of the structure of the utility model. The skilled in the art can make various modifications or supplements to the described specific embodiments or adopt similar ways to replace them, as long as the structure of the utility model is not deviated or the scope defined by the claims is not exceeded, which shall belong to the protection scope of the utility model.

Claims

1. A heavy truck front cross member, characterized in that, The utility model relates to a front connecting beam of truck, including: The integral forming base plate (1), L type lug (2), side plate (3), U type plate (4), extension plate (5) and two symmetrically arranged strip plate (6), be equipped with first installation area on base plate (1), to install front connecting beam on frame longitudinal beam; L type lug (2) and side plate (3) are all along the top edge of base plate (1) arrangement, L type lug (2) protrude to one side of base plate (1), the top surface of L type lug (2) is equipped with the steering gear assembly transition plate installation site, the side of L type lug (2) is equipped with cooling water tank installation site and driver's cabin lifting oil cylinder installation site, side plate (3) is perpendicular to the connection of base plate (1), and side plate (3) is equipped with driver's cabin turnover support installation site; U type plate (4) and extension plate (5) are all along the bottom edge of base plate (1) arrangement, U type plate (4) protrude to the other side of base plate (1), and the two side plates of U type plate (4) form the steel plate spring installation cavity between, and the top plate of U type plate (4) is equipped with second installation area, to connect front connecting beam with the lower end surface of car frame, and extension plate (5) is horizontally connected with base plate (1), and extension plate (5) is equipped with front lower protection assembly installation site and car step support installation site; Two strip plates (6) are all perpendicular to the side edge of base plate (1) connection, and two strip plates (6) combination form U type bumper assembly installation site.

2. The front girder according to claim 1, characterized in that Still include the column (7) of being connected between two strip plates (6), and one end of column (7) is connected with base plate (1), and the other end coaxially is equipped with the traction hole (71) of being adapted with front trailer hook.

3. The front girder according to claim 1, characterized in that The first installation area of base plate (1) is equipped with ten first threaded holes (11) corresponding with the hole site on the frame longitudinal beam.

4. The front girder according to claim 1, characterized in that The top surface of L type lug (2) is equipped with four second threaded holes (21) corresponding with the hole site on the steering gear assembly transition plate, and the side of L type lug (2) is equipped with two third threaded holes (22) corresponding with the hole site on the cooling water tank and four fourth threaded holes (23) corresponding with the hole site on the driver's cabin lifting oil cylinder.

5. The front girder according to claim 1, wherein The tenth threaded hole (31) corresponding with the hole site on the driver's cabin turnover support is equipped on side plate (3).

6. The front girder according to claim 1, wherein The second installation area of the top plate of U type plate (4) is equipped with two fifth threaded holes (41) corresponding with the hole site on the lower end surface of car frame, and the sixth threaded hole (42) is equipped on one side plate of U type plate (4), and the through hole (43) is equipped on the other side plate, to connect the steel plate spring between two side plates through the pin shaft in through hole (43), and fastening through the bolt in sixth threaded hole (42).

7. The front girder according to claim 1, wherein The seventh threaded hole (51) corresponding with the hole site on the front lower protection assembly and the eighth threaded hole (52) corresponding with the hole site on the car step support are equipped on extension plate (5).

8. The front girder according to claim 1, wherein The ninth threaded hole (61) corresponding with the upper and lower end surface hole site of U type bumper assembly is equipped on two strip plates (6) respectively.

9. The front girder according to claim 1, wherein The middle part of first installation area on base plate (1) and between L type lug (2) and strip plate (6) are equipped with hollow structure, and all are equipped with hollow structure on extension plate (5) and U type plate (4).

10. The front girder according to claim 1, wherein L type lug (2) is provided with hollow shell structure, and the protruding side forms installation surface, and the back side forms the recess of weight reduction.

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