Force transfer structure at front part of cabin and vehicle

Abstract

The invention provides a cabin front force transmission structure and a vehicle. The engine room front force transmission structure comprises engine room longitudinal beams, engine room edge beams and a front wheel cover assembly which are arranged on the left side and the right side of an engine room correspondingly, and a front anti-collision beam assembly connected between the front ends of the two engine room longitudinal beams. The front-end upper cross beam is connected between the front ends of the two cabin edge beams; the front-end middle cross beam is positioned between the front-end upper cross beam and the front anti-collision beam assembly; the supporting structures are connected between the front-end middle cross beam and the front-end upper cross beam, between the front anti-collision beam assembly and the front-end middle cross beam and between the engine room longitudinal beam and the engine room edge beam respectively. According to the engine room front part force transmission structure, the combination form of the two cross beams and the multiple supporting structures is adopted, the front anti-collision beam assembly, the engine room edge beams and the engine room longitudinal beams are connected into the whole frame, the whole structure and space arrangement are simple, and therefore the engine room front part framework structure which is compact in arrangement space and good in structural strength is provided.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle body structures, and in particular to a force transmission structure at the front of a cabin. In addition, the present invention also relates to a vehicle. Background Art

[0002] The front force transmission structure of the cabin is an important component of the vehicle body frame. Its main function is to connect the two main force transmission channels of the cabin longitudinal beam and the cabin side beam, resist external collision impact, protect the integrity of the vehicle body structure, and simultaneously provide installation points for various accessories in the cabin. It is an important load-bearing and load-bearing part of the vehicle structure.

[0003] At present, the front force transmission structure of the cabin is composed of the main parts such as the front anti-collision beam assembly, the front end frame, the cabin longitudinal beam, the cabin side beam, the front wheel cover assembly and the connecting bracket, among which the cabin longitudinal beam, the cabin side beam, the front wheel cover assembly and the connecting bracket are designed to be symmetrical. The front end frame connects the cabin longitudinal beams on the left and right sides in the vehicle Y direction (left and right direction), and connects the front anti-collision beam assembly and the cabin longitudinal beam in the vehicle X direction (front and back direction), and the connecting bracket connects the front end frame and the cabin side beam.

[0004] The existing force transmission structure at the front of the cabin has a single connection form and low overall strength. In the event of a head-on collision or an offset collision, the front of the vehicle body is severely damaged and has low safety performance. Moreover, the front-end frame is large in size, has a complex design structure, and has a high manufacturing cost. It is not suitable for a low-cost, high-performance vehicle structure with a compact space. When a collision occurs and the front-end structure of the vehicle body is damaged, the front-end frame needs to be replaced as a whole, resulting in a high maintenance cost for the entire vehicle. Summary of the invention

[0005] In view of this, the present invention aims to propose a cabin front force transmission structure to provide a cabin front skeleton structure with compact layout space and good structural strength.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A force transmission structure at the front of a cabin, comprising a cabin longitudinal beam, a cabin side beam and a front wheel cover assembly respectively arranged on the left and right sides of the cabin, and a front anti-collision beam assembly connected between the front ends of the two cabin longitudinal beams; the force transmission structure at the front of the cabin also includes a front end upper cross beam connected between the front ends of the two cabin side beams, a front end middle cross beam located between the front end upper cross beam and the front anti-collision beam assembly, and a plurality of supporting structures respectively connected between the front end middle cross beam and the front end upper cross beam, between the front anti-collision beam assembly and the front end middle cross beam, and between the cabin longitudinal beam and the cabin side beam.

[0008] Furthermore, the supporting structure includes a front-end frame tie rod supported between the front anti-collision beam assembly and the front end middle cross beam; the front-end frame tie rod includes an anti-collision beam connecting section fixedly connected to the middle part of the anti-collision beam body of the front anti-collision beam assembly, support sections extending from both ends of the anti-collision beam connecting section toward the upper left and right sides of the cabin, and middle cross beam connecting parts respectively formed at the ends of the two support sections; the two middle cross beam connecting parts are both connected to the front end middle cross beam.

[0009] Furthermore, the front end frame tie rod is made of tubular material, and the anti-collision beam connecting section and the middle cross beam connecting portion are both stamped into a flat shape; the anti-collision beam connecting section is fixedly connected to the anti-collision beam body by a first bolt, and the middle cross beam connecting portion is fixedly connected to the front end middle cross beam by a second bolt.

[0010] Furthermore, the anti-collision beam connecting section abuts against the top of the front anti-collision beam assembly, and a first welding nut is provided in the front anti-collision beam assembly, and the first bolt is screwed connected to the first welding nut; and / or, the middle cross beam connecting portion abuts against the side of the front end middle cross beam facing the front of the vehicle, and a second welding nut is provided in the front end middle cross beam, and the second bolt is screwed connected to the second welding nut.

[0011] Furthermore, the front end upper cross beam and the front end middle cross beam are staggered in the height direction of the vehicle, and in the front and rear direction of the vehicle, the front end upper cross beam is located behind the front end middle cross beam; the supporting structure includes a plurality of connecting beams supported between the front end middle cross beam and the front end upper cross beam, and each of the connecting beams is arranged at intervals in the left and right direction of the vehicle.

[0012] Furthermore, reinforcing ribs are formed on the connecting beam; and / or, reinforcing flanges are provided on the sides of the connecting beam; and / or, both ends of the connecting beam are respectively connected to the top of the front end upper crossbeam and the top of the front end middle crossbeam.

[0013] Furthermore, the front portion of the cabin side beam is bent toward the inner side of the vehicle, and the middle portion of the front end upper cross beam is arched upward.

[0014] Furthermore, the supporting structure includes a side beam and longitudinal beam connecting bracket supported between the cabin longitudinal beam and the cabin side beam on the same side; the side beam and longitudinal beam connecting bracket includes a main support rod arranged obliquely toward the rear of the vehicle, and an auxiliary support rod arranged obliquely toward the inner side of the vehicle; the bottom end of the main support rod is connected to the front part of the cabin longitudinal beam, and the top end of the main support rod is connected to the transition part between the front and middle parts of the cabin side beam; the auxiliary support rod is connected between the middle part of the main support rod and the front end of the cabin side beam.

[0015] Furthermore, the end of the front upper cross beam is overlapped on the front end top of the cabin side beam, and the end is screwed and fixedly connected to the cabin side beam by a third bolt.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The force transmission structure at the front of the cabin of the present invention adopts a combination of two cross beams and multiple supporting structures to connect the front anti-collision beam assembly, the cabin side beam and the cabin longitudinal beam into a frame as a whole, thereby forming multiple force transmission closed loops at the front of the cabin, which can effectively transmit the impact force when the front of the vehicle is hit to important load-bearing structures such as the cabin side beam and the cabin longitudinal beam, and the overall structure and spatial layout are simple, thereby providing a cabin front skeleton structure with compact layout space and good structural strength.

[0018] In addition, a front end frame tie rod that is roughly "U"-shaped is provided between the front anti-collision beam body and the front end middle cross beam of the front anti-collision beam assembly, which not only forms an effective support between the front anti-collision beam assembly and the front end middle cross beam, but also, the front end frame tie rod and the front end middle cross beam form a first force transmission closed loop, which can effectively and evenly transmit part of the impact force received by the front anti-collision beam assembly to the front end middle cross beam, and then transmit it to the cabin side beams on both sides by the front end upper cross beam.

[0019] Another object of the present invention is to provide a vehicle, wherein the vehicle adopts the engine room front force transmission structure of the present invention. The vehicle of the present invention has the technical advantages possessed by the above-mentioned engine room front force transmission structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention. The directional terms such as front and back, up and down, etc. involved therein are only used to indicate relative positional relationships and do not constitute improper limitations on the present invention. In the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the force transmission structure at the front of the cabin according to the first embodiment of the present invention;

[0022] Figure 2 It is a schematic structural diagram of the force transmission structure at the front of the cabin according to the first embodiment of the present invention at a downward tilted angle in front of the cabin;

[0023] Figure 3 This is a schematic diagram of the partial structure of the force transmission structure at the front of the cabin according to the first embodiment of the present invention;

[0024] Figure 4 for Figure 3 A partial enlarged view of the part shown in A;

[0025] Figure 5 for Figure 4 The cross-sectional view of the part shown in DD;

[0026] Figure 6 for Figure 3 A partial enlarged view of the part shown in B;

[0027] Figure 7 for Figure 6 The cross-sectional view of the part shown in EE;

[0028] Figure 8 for Figure 3 A partial enlarged view of the part shown in C;

[0029] Fig. 9 for Figure 8 Cross-sectional view of the part indicated by FF.

[0030] Description of reference numerals:

[0031] 1. Cabin side beam; 10. Upper beam body; 11. Lower beam body;

[0032] 2. Cabin longitudinal beam; 20. Inner beam body; 21. Outer beam body;

[0033] 3. Front wheel cover assembly; 4. Front windshield beam; 5. Front wall panel;

[0034] 6. Front anti-collision beam assembly; 60. Anti-collision beam body; 61. Energy absorption box; 600. Chamber;

[0035] 71, front middle cross beam; 72, front upper cross beam; 720, middle part; 721, end part; 73, front frame tie rod; 730, anti-collision beam connecting section; 731, support section; 732, middle cross beam connecting section;

[0036] 81, first connecting beam; 810, middle section; 811, top; 812, bottom; 82, second connecting beam; 83, side beam and longitudinal beam connecting bracket; 830, main support rod; 831, auxiliary support rod; 832, support base;

[0037] 91, first force transmission closed loop; 92, second force transmission closed loop; 93, third force transmission closed loop; 94, fourth force transmission closed loop; 95, fifth force transmission closed loop;

[0038] 901, first bolt; 902, second bolt; 903, third bolt; 911, first welding nut; 912, second welding nut; 913, third welding nut. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0040] In the description of the present invention, it should be stated that if there are terms indicating orientation or positional relationship such as "up, down, left, right, front, back, inside, outside", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. Taking the vehicle described in the present invention as an example, the orientation words such as "up, down, left, right, front, back" used in the embodiments are defined based on the up and down direction (also known as the height direction), the left and right direction (also known as the width direction) and the front and back direction (also known as the length direction) of the vehicle. Specifically, as shown in the drawings, the X direction is the front and back direction of the vehicle, wherein the side to which the arrow points is "front", and the opposite is "back". The Y direction is the left and right direction of the vehicle, wherein the side to which the arrow points is "left", and the opposite is "right". The Z direction is the up and down direction of the vehicle, wherein the side to which the arrow points is "up", and the opposite is "down". “Inside” and “outside” are defined based on the contour of the corresponding components. For example, “inside” and “outside” are defined based on the contour of a vehicle, with the side of the vehicle contour close to the middle of the vehicle being “inside” and the opposite being the case being “outside”.

[0041] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installed", "connected", "connection", and "connector" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances. The limiting terms such as "first, second, A, B, C, D" that appear in the description of the present invention are only for distinguishing similar features of different positions, affiliations or uses, so as to achieve the purpose of avoiding ambiguity and confusion in the description, and cannot be understood as indicating or implying relative importance.

[0042] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0043] Embodiment 1

[0044] This embodiment relates to a force transmission structure at the front of the cabin, providing a cabin front skeleton structure with compact layout space and good structural strength; an exemplary structure thereof is as follows Figure 1 and Figure 2 shown.

[0045] In general, the force transmission structure at the front of the cabin includes a cabin longitudinal beam 2, a cabin side beam 1 and a front wheel cover assembly 3 which are arranged on the left and right sides of the cabin, and a front anti-collision beam assembly 6 connected between the front ends of the two cabin longitudinal beams 2; the force transmission structure at the front of the cabin also includes a front end upper cross beam 72 connected between the front ends of the two cabin side beams 1, a front end middle cross beam 71 located between the front end upper cross beam 72 and the front anti-collision beam assembly 6, and multiple supporting structures respectively connected between the front end middle cross beam 71 and the front end upper cross beam 72, between the front anti-collision beam assembly 6 and the front end middle cross beam 71, and between the cabin longitudinal beam 2 and the cabin side beam 1.

[0046] Of course, the overall cabin frame of the present embodiment also includes a front panel 5 connected to the cabin side beams 1 on both sides and the tail of the cabin longitudinal beams 2 on both sides, and a front windshield cross beam 4 arranged above the front panel 5. The engine and other components in the cabin are arranged inside the cabin formed by the above-mentioned structural components, and the force transmission structure at the front of the cabin plays a good protective role for the components inside the cabin.

[0047] Specifically, combined Figure 3 As shown, the support structure of this embodiment includes a front frame tie rod 73 supported between the front anti-collision beam assembly 6 and the front middle cross beam 71. The front frame tie rod 73 includes an anti-collision beam connecting section 730 fixedly connected to the middle part of the anti-collision beam body 60 of the front anti-collision beam assembly 6, support sections 731 extending from both ends of the anti-collision beam connecting section 730 toward the upper left and right sides of the cabin, and middle cross beam connecting parts 732 respectively formed at the ends of the two support sections 731; the two middle cross beam connecting parts 732 are both connected to the front middle cross beam 71. A front end frame tie rod 73 which is roughly "U"-shaped is arranged between the front anti-collision beam body 60 and the front end middle cross beam 71 of the front anti-collision beam assembly 6, which not only forms an effective support between the front anti-collision beam assembly 6 and the front end middle cross beam 71, but also a first force transmission closed loop 91 formed by the front end frame tie rod 73 and the front end middle cross beam 71 can effectively and evenly transmit part of the impact force received by the front anti-collision beam assembly 6 to the front end middle cross beam 71, and then transmit it to the cabin side beams 1 on both sides by the front end upper cross beam 72.

[0048] like Figure 4 , Figure 5As shown, the front-end frame tie rod 73 is preferably made of tubular material; moreover, the anti-collision beam connecting section 730 and the middle cross beam connecting portion 732 are both stamped into a flat shape. Among them, the anti-collision beam connecting section 730 is screwed and fixedly connected to the anti-collision beam body 60 by a first bolt 901, and the middle cross beam connecting portion 732 is screwed and fixedly connected to the front middle cross beam 71 by a second bolt 902. The front-end frame tie rod 73 is made of tubular material, and the material preparation is simpler and the processing and forming are convenient. The anti-collision beam connecting section 730 and the middle cross beam connecting portion 732 are squeezed into a flat shape, which can effectively increase the contact area of ​​the connection, and it is also convenient to open a through hole at the anti-collision beam connecting section 730 and the middle cross beam connecting portion 732, and install the front-end frame tie rod 73 by bolting.

[0049] The specific connection positions of the anti-collision beam connecting section 730 and the anti-collision beam body 60, and the middle cross beam connecting portion 732 and the front middle cross beam 71 can of course be flexibly selected. Figure 6 , Figure 7 As shown, the anti-collision beam connecting section 730 abuts against the top of the front anti-collision beam assembly 6, and the front anti-collision beam assembly 6 is provided with a first welding nut 911, and the first bolt 901 is screwed and connected to the first welding nut 911. The middle cross beam connecting portion 732 abuts against the side of the front middle cross beam 71 facing the front of the vehicle, and the front middle cross beam 71 is provided with a second welding nut 912, and the second bolt 902 is screwed and connected to the second welding nut 912.

[0050] In order to improve the structural performance of the anti-collision beam body 60, it is preferred to form a plurality of chambers 600 arranged up and down inside the anti-collision beam body 60. The anti-collision beam body 60 of this embodiment has three chambers 600 evenly distributed up and down, and two first welding nuts 911 are arranged in the uppermost chamber 600, and the two first welding nuts 911 are welded to the inner side of the top wall of the anti-collision beam body 60. Two through holes are provided on the anti-collision beam connecting section 730, and two first bolts 901 are respectively passed through the two through holes and screwed into the corresponding first welding nuts 911, which can effectively enhance the connection strength between the front frame tie rod 73 and the anti-collision beam body 60. Similarly, a second welding nut 912 is pre-set in the inner cavity of the front middle cross beam 71, and the second bolt 902 passes through the through hole on the middle cross beam connecting portion 732 and is screwed to the second welding nut 912, which can also enhance the connection strength between the front frame tie rod 73 and the front middle cross beam 71.

[0051] In addition, there are of course many design forms for the arrangement and quantity of the support structure between the front middle cross beam 71 and the front upper cross beam 72. In this embodiment, Figure 3As shown, the front upper cross beam 72 and the front middle cross beam 71 are staggered in the height direction of the vehicle, and in the front-to-back direction of the vehicle, the front upper cross beam 72 is located behind the front middle cross beam 71. The above-mentioned support structure also includes a plurality of connecting beams supported between the front middle cross beam 71 and the front upper cross beam 72, and each connecting beam is arranged at intervals in the left-right direction of the vehicle. The front upper cross beam 72 and the front middle cross beam 71 are staggered in the front-to-back direction of the vehicle, and each connecting beam will also present a backward tilting posture from bottom to top, which is suitable for the external shape of the front end of the vehicle. Moreover, this structural setting also facilitates the decomposition and transmission of the impact force at the front anti-collision beam assembly 6 to the upper side, thereby improving the transmission decomposition and mitigation effect of the impact force in the event of a collision at the front end of the vehicle.

[0052] Specifically, the connection beam of this embodiment includes a second connection beam 82 connected between the middle part of the front middle cross beam 71 and the middle part of the front upper cross beam 72, and two first connection beams 81 respectively arranged on the left and right sides of the second connection beam 82. In this way, on both sides of the second connection beam 82, a second force transmission closed loop 92 is formed by the second connection beam 82, the front middle cross beam 71, the first connection beam 81 and the front upper cross beam 72, respectively; thereby forming a good force transmission effect between the two cross beams.

[0053] Moreover, preferably, reinforcing ribs may be provided on the connecting beams; or reinforcing flanges may be provided on the sides of the connecting beams. The positions at which the two ends of each connecting beam are connected to the front middle cross beam 71 and the front upper cross beam 72 may be flexibly selected. Preferably, the top end of the connecting beam is connected to the top of the front upper cross beam 72, and the bottom end of the connecting beam is connected to the top of the front middle cross beam 71.

[0054] Of course, the above-mentioned reinforcing ribs, reinforcing flanges, and specific connection positions of the ends of each connecting beam can be flexibly selected and reasonably set. In this embodiment, the two first connecting beams 81 each include a middle section 810, a top section 811 bent and formed at the top of the middle section 810, and a bottom section 812 bent and formed at the bottom of the middle section 810, and the middle section 810 is provided with reinforcing ribs. The top section 811 is overlapped on the middle section 720 and welded and fixed; the bottom section 812 itself is a bent structure, and is simultaneously abutted against the top of the front middle cross beam 71 and the side of the front middle cross beam 71 facing the front of the vehicle. At the same time, the middle beam connecting part 732 of the front frame tie rod 73 clamps the bottom 812 abutting against the front side of the front middle beam 71 between the front middle beam 71 and the middle beam connecting part 732. The second bolt 902 passes through the middle beam connecting part 732 and the bottom 812 in sequence, and is screwed to the second welding nut 912 provided in the front middle beam 71. The top of the first connecting beam 81 can be connected to the front upper beam 72 by welding. The top of the second connecting beam 82 overlaps the top of the front upper beam 72, and the bottom of the second connecting beam 82 abuts against the top of the front middle beam 71. Both ends of the second connecting beam 82 can be respectively connected to the front upper beam 72 and the front middle beam 71 by welding.

[0055] As for the connection method between the front upper cross beam 72 and the cabin side beam 1, the following scheme is preferably adopted. It should be noted that the cabin side beam 1 and the cabin longitudinal beam 2 of this embodiment both adopt split beam bodies, wherein the cabin side beam 1 includes an upper beam body 10 and a lower beam body 11 buckled together from top to bottom, and the cabin longitudinal beam 2 includes an inner beam body 20 and an outer beam body 21 buckled together from left to right.

[0056] Based on the above settings, combined with Figure 6 , Figure 7 As shown, the front portion of the cabin side beam 1 of this embodiment is bent toward the inner side of the vehicle, and the middle portion 720 of the front upper cross beam 72 of this embodiment also adopts an upwardly arched structure. The end portion 721 of the front upper cross beam 72 is overlapped on the front end top of the cabin side beam 1, and the end portion 721 is screwed and fixedly connected to the upper beam body 10 of the cabin side beam 1 by a third bolt 903.

[0057] The front part of the cabin side beam 1 is designed to be bent inward, so the cabin side beams 1 on the left and right sides and the front upper cross beam 72 together form a structure that arches toward the front of the vehicle, which is beneficial to improving the ability of the front part of the cabin to withstand the impact of a frontal collision, and can well disperse and alleviate the damage of the impact force to the internal components of the cabin. The middle part 720 of the front upper cross beam 72 adopts an upward arched structure, which can also improve the structural stability of the front upper cross beam 72, and cooperate with the surrounding connecting beams and the cabin side beams 1, etc., to achieve the effect of improving the overall skeleton structural strength of the front part of the cabin.

[0058] Moreover, the front end of the front upper cross beam 72 and the front end of the cabin side beam 1 are connected by bolts, which has good connection firmness; at the same time, it is preferred to preset a third welding nut 913 inside the cabin side beam 1 (that is, in the inner cavity formed by the upper beam body 10 and the lower beam body 11), and a through hole is opened at the end 721. The third bolt 903 passes through the through hole and is screwed to the third welding nut 913, so as to form a reliable fixed connection between the cabin side beam 1 and the front end upper cross beam 72.

[0059] In addition, the support structure of this embodiment also includes a side beam longitudinal beam connecting bracket 83 supported between the cabin longitudinal beam 2 and the cabin side beam 1 on the same side. The side beam longitudinal beam connecting bracket 83 includes a main support rod 830 arranged obliquely toward the rear of the vehicle, and an auxiliary support rod 831 arranged obliquely toward the inner side of the vehicle. Among them, the bottom end of the main support rod 830 is connected to the front part of the cabin longitudinal beam 2, and the top end of the main support rod 830 is connected to the transition part between the front and middle parts of the cabin side beam 1; the auxiliary support rod 831 is connected between the middle part of the main support rod 830 and the front end of the cabin side beam 1, and preferably a support base 832 is set at the top end of the auxiliary support rod 831, and the support base 832 abuts against the bottom of the cabin side beam 1 and is welded to the lower beam body 11.

[0060] A side beam and longitudinal beam connecting bracket 83 with a triangular supporting structure is arranged between the cabin side beam 1 and the cabin longitudinal beam 2, which can not only form a stable support between the cabin side beam 1 and the cabin longitudinal beam 2 in the vehicle height direction, but also, a third force transmission closed loop 93 is formed by the front part of the cabin side beam 1, the end 721 of the front upper cross beam 72, the first connecting beam 81 on the same side, the middle cross beam connecting part 732 on the same side, the anti-collision beam body 60, the energy absorption box 61 on the same side, the front end of the cabin longitudinal beam 2, and the side beam and longitudinal beam connecting bracket 83 on the same side, and a fourth force transmission closed loop 94 is formed between the main support rod 830, the auxiliary support rod 831 and the front part of the cabin side beam 1. These closed-loop force transmission paths can effectively and evenly disperse the impact force at the front anti-collision beam assembly 6 to the cabin side beam 1 and the cabin longitudinal beam 2, thereby improving the overall force transmission effect of the force transmission structure at the front of the cabin.

[0061] In summary, the force transmission structure at the front of the cabin of the present embodiment adopts a combination of two cross beams and multiple supporting structures to connect the front anti-collision beam assembly 6, the cabin side beam 1 and the cabin longitudinal beam 2 into a frame as a whole, thereby forming the above-mentioned first force transmission closed loop 91, the second force transmission closed loop 92, the third force transmission closed loop 93, the fourth force transmission closed loop 94 and other multiple force transmission closed loops at the front of the cabin, and a fifth force transmission closed loop 95 is also formed between the front panel 5, the cabin side beam 1 and the front end upper cross beam 72; these closed-loop force transmission structures can effectively transmit the impact force when the front of the vehicle is hit to the main load-bearing structures such as the cabin side beam 1 and the cabin longitudinal beam 2, and the overall structure and spatial layout are simple, thereby providing a cabin front skeleton structure with compact layout space and good structural strength.

[0062] Embodiment 2

[0063] This embodiment relates to a vehicle, which adopts the front force transmission structure of the cabin provided in the first embodiment.

[0064] By adopting the above-mentioned force transmission structure at the front of the cabin, a multiple force transmission ring superposition structure is formed at the front of the cabin, and the key connection parts between each supporting structure and the beam body adopt high-rigidity design such as bolt fixing, which effectively improves the safety performance of the vehicle body and can effectively resist collision damage.

[0065] In the event of a head-on collision, the collision force is decomposed through the front anti-collision beam assembly 6, combined with Figure 2 As shown in the figure, the decomposed collision force is transmitted along the following two force transmission routes:

[0066] Route 1: The collision force enters the first force transmission closed loop 91 through the front frame tie rod 73. After being borne by the first force transmission closed loop 91, the collision force enters the second force transmission closed loop 92 on the left and right sides. After being fully borne, it enters the fifth force transmission closed loop 95 and is then transmitted to the rear of the vehicle body.

[0067] Route 2: The collision force is transmitted to the energy absorption boxes 61 and the cabin longitudinal beam 2 on the left and right sides through the anti-collision beam body 60. Part of the force is transmitted to the fifth force transmission closed loop 95 through the side beam and longitudinal beam connecting bracket 83 on the left and right sides and through the third force transmission closed loop 93 and the fourth force transmission closed loop 94, and merges with route 1. The other part of the force is transmitted along the cabin longitudinal beam 2 to the rear of the vehicle body.

[0068] After the collision force is resisted by the high-strength load-bearing closed loop, it is transmitted to the rear of the vehicle body, which effectively protects the integrity of the cabin structure and improves the collision safety of the whole vehicle. It can be seen that the front cabin force transmission structure of this embodiment adopts a mesh connection structure with superimposed rings, which realizes the high-strength connection and bearing of the two major force transmission channels of the cabin side beam 1 and the cabin longitudinal beam 2. In the event of a frontal or offset collision, it can effectively reduce the damage caused by the front cabin collision and improve the safety of the occupants; moreover, the key connection parts of each load-bearing ring body adopt a cavity superposition structure and a welded nut screw connection structure, which realizes the high-rigidity design characteristics of the connection joint, fully improves the rigidity of the front cabin structure, and the design structure also has a significant improvement effect on preventing external excitation transmission and reducing the noise of the whole vehicle. At the same time, the force transmission structure at the front of the cabin of this embodiment abandons the conventional large-volume front-end frame design structure and adopts a design method of pull rods, connecting beams and cross beams, which effectively saves layout space, simplifies process design, facilitates the layout of accessories inside the cabin, and realizes a low-volume, high-strength structural design. It can effectively solve the problem of difficult layout due to the compact space at the front of the cabin and simultaneously reduce the manufacturing cost of the entire vehicle.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A force transmission structure at the front of a cabin, comprising a cabin longitudinal beam (2), a cabin side beam (1) and a front wheel cover assembly (3) respectively arranged on the left and right sides of the cabin, and a front anti-collision beam assembly (6) connected between the front ends of the two cabin longitudinal beams (2); characterized in that: The front force transmission structure of the cabin also includes a front upper cross beam (72) connected between the front ends of the two cabin side beams (1), a front middle cross beam (71) located between the front upper cross beam (72) and the front anti-collision beam assembly (6), and a plurality of supporting structures respectively connected between the front middle cross beam (71) and the front upper cross beam (72), between the front anti-collision beam assembly (6) and the front middle cross beam (71), and between the cabin longitudinal beam (2) and the cabin side beam (1).

2. The front force transmission structure of the cabin according to claim 1, characterized in that: The support structure comprises a front frame tie rod (73) supported between the front anti-collision beam assembly (6) and the front middle cross beam (71); The front frame tie rod (73) comprises an anti-collision beam connecting section (730) fixedly connected to the middle part of the anti-collision beam body (60) of the front anti-collision beam assembly (6), support sections (731) extending from both ends of the anti-collision beam connecting section (730) toward the upper left and right sides of the cabin, and middle cross beam connecting parts (732) respectively formed at the ends of the two support sections (731); The two middle cross beam connection parts (732) are both connected to the front middle cross beam (71).

3. The front force transmission structure of the cabin according to claim 2, characterized in that: The front frame tie rod (73) is made of a tube profile, and the anti-collision beam connecting section (730) and the middle cross beam connecting section (732) are both stamped into a flat shape; The anti-collision beam connection section (730) is screwed and fixedly connected to the anti-collision beam body (60) through a first bolt (901), and the middle cross beam connection portion (732) is screwed and fixedly connected to the front middle cross beam (71) through a second bolt (902).

4. The front force transmission structure of the cabin according to claim 3, characterized in that: The anti-collision beam connecting section (730) abuts against the top of the front anti-collision beam assembly (6), and a first welding nut (911) is provided in the front anti-collision beam assembly (6), and the first bolt (901) is threadedly connected to the first welding nut (911); And / or, the middle cross beam connecting portion (732) abuts against a side of the front middle cross beam (71) facing the front of the vehicle, and a second welding nut (912) is provided in the front middle cross beam (71), and the second bolt (902) is threadedly connected to the second welding nut (912).

5. The front force transmission structure of the cabin according to claim 1, characterized in that: The front upper cross beam (72) and the front middle cross beam (71) are arranged in a staggered manner in the height direction of the vehicle, and in the front-rear direction of the vehicle, the front upper cross beam (72) is located behind the front middle cross beam (71); The support structure comprises a plurality of connection beams supported between the front middle cross beam (71) and the front upper cross beam (72), and the connection beams are arranged at intervals in the left-right direction of the vehicle.

6. The front force transmission structure of the cabin according to claim 5, characterized in that: The connecting beam is formed with reinforcing ribs; And / or, the side of the connecting beam is provided with a reinforcing flange; And / or, the two ends of the connecting beam are respectively connected to the top of the front upper crossbeam (72) and the top of the front middle crossbeam (71).

7. The front force transmission structure of the nacelle according to any one of claims 1 to 6, characterized in that: The front portion of the cabin side beam (1) is bent toward the inner side of the vehicle, and the middle portion (720) of the front upper cross beam (72) is arched upward.

8. The front force transmission structure of the cabin according to claim 7, characterized in that: The supporting structure comprises a side beam and longitudinal beam connecting bracket (83) supported between the cabin longitudinal beam (2) and the cabin side beam (1) on the same side; The side beam and longitudinal beam connecting bracket (83) comprises a main support rod (830) arranged obliquely toward the rear of the vehicle, and an auxiliary support rod (831) arranged obliquely toward the inner side of the vehicle; The bottom end of the main support rod (830) is connected to the front part of the cabin longitudinal beam (2), and the top end of the main support rod (830) is connected to the transition part between the front part and the middle part of the cabin side beam (1); The auxiliary support rod (831) is connected between the middle portion of the main support rod (830) and the front end of the cabin side beam (1).

9. The front force transmission structure of the cabin according to claim 8, characterized in that: The end portion (721) of the front upper cross beam (72) is overlapped on the front end top of the cabin side beam (1), and the end portion (721) is screwed and fixedly connected to the cabin side beam (1) via a third bolt (903).

10. A vehicle, characterized in that: The vehicle adopts the front force transmission structure of the cabin according to any one of claims 1 to 9.

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