Front auxiliary frame and automobile

Abstract

The invention discloses a front auxiliary frame and an automobile, the front auxiliary frame comprises two opposite longitudinal energy absorption beams connected between a longitudinal beam and a transverse anti-collision beam and further comprises a first filament cross rope arranged between the two longitudinal energy absorption beams, and the two ends of the first filament cross rope are connected with the positions, close to the transverse anti-collision beam, of the longitudinal energy absorption beams. The front auxiliary frame disclosed by the invention is beneficial to improving the front collision safety performance of the automobile.

Description

Technical Field

[0001] The invention relates to the technical field of automobiles, and in particular to a front subframe and an automobile. Background Art

[0002] The subframe is mainly used for load-bearing structure vehicles. It is a structural reinforcement device connecting the suspension components and the body. It can provide high-precision, high-reliability, and high-rigidity installation interfaces for vibration reduction components, steering components, driving components, braking components, and collisions. It cooperates with the definition requirements of vehicle tuning to ensure that the comfort, handling, driving stability, and collision safety of the vehicle meet the use requirements. The lower-level components of the subframe are generally connected as a whole through welding and assembly.

[0003] As we all know, vehicle safety is increasingly valued by people and has become one of the most important factors people consider when buying a car. When a car collides, the collision between the car and external objects is usually called the "primary collision", while the collision between the human body and the internal parts of the car is called the "secondary collision". From the human body injury mechanism in car collision accidents, it can be seen that although the "secondary collision" is the direct cause of human body injury, the "primary collision" largely determines the severity of the "secondary collision". In the existing market passenger cars, the front subframe is increasingly considered in the design of its collision safety.

[0004] The longitudinal beam of the front subframe is the main energy-absorbing component in the front collision process. Due to the limitations of the front structure design and other aspects, the length of the front longitudinal beam is limited. This means that even if the vehicle meets the requirements of the collision regulations, the occupants are still at great risk of injury or death in a higher-speed collision. Especially for some light and micro vehicles, the front space inside the vehicle is very limited, making it difficult to achieve a good collision safety effect. Therefore, how to further improve the front collision safety performance of the vehicle under the condition of limited front energy-absorbing space of the vehicle has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] In view of this, one of the objects of the present invention is to provide a front subframe so as to improve the front collision safety performance of an automobile. Another object of the present invention is to provide an automobile comprising the above-mentioned front subframe.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A front subframe includes two oppositely arranged longitudinal energy absorbing beams connected between a longitudinal beam and a transverse anti-collision beam, and also includes a first thin wire cross rope arranged between the two longitudinal energy absorbing beams, wherein the two ends of the first thin wire cross rope are connected to the longitudinal energy absorbing beams near the transverse anti-collision beams.

[0008] Optionally, the front sub-frame further includes a tight-fitting energy-absorbing tube sleeved on the first filament cross rope.

[0009] Optionally, the above-mentioned front subframe also includes a second thin wire cross rope and a third thin wire cross rope arranged in a cross pattern, and the same end of the second thin wire cross rope and the third thin wire cross rope are respectively connected to a position of the longitudinal energy absorbing beam close to the transverse anti-collision beam and a position of the longitudinal energy absorbing beam close to the transverse anti-collision beam.

[0010] Optionally, in the above-mentioned front subframe, at least one of the first thin-filament cross rope, the second thin-filament cross rope and the third thin-filament cross rope is sleeved with a tight-fitting energy-absorbing tube.

[0011] Optionally, in the above-mentioned front subframe, at least one of the two longitudinal energy-absorbing beams is provided with an induced deformation structure on a side facing the other side.

[0012] Optionally, in the above-mentioned front subframe, the induced deformation structure includes a corrugated structure formed by a plurality of grooves distributed along the length direction of the longitudinal energy absorbing beam.

[0013] Optionally, the front subframe includes a first cross beam and a second cross beam located between the two longitudinal beams, the first cross beam and the second cross beam are arranged parallel to each other, two ends of the first cross beam connect one end of the two longitudinal beams close to the longitudinal energy absorbing beam, and two ends of the second cross beam connect one end of the two longitudinal beams away from the longitudinal energy absorbing beam.

[0014] Optionally, the front subframe comprises three first brackets distributed in a herringbone shape, wherein two of the first brackets are fixed to the first crossbeam, and another first bracket is fixed to the second crossbeam, and the three first brackets together form a mounting structure for mounting a generator or a motor.

[0015] Optionally, the front subframe includes:

[0016] Two second brackets are symmetrically arranged on the outer sides of the two longitudinal beams and close to the second cross beam, and the second brackets are used to install wheel swing arms; and / or,

[0017] Four vertically arranged mounting sleeves for connecting the vehicle frame, wherein two of the mounting sleeves are fixed at two ends of one longitudinal beam, and the other two of the mounting sleeves are fixed at two ends of another longitudinal beam.

[0018] A vehicle comprises a front subframe as disclosed in any one of the above items.

[0019] The front subframe provided by the present invention has the following beneficial effects:

[0020] The front subframe of the present invention is provided with a first filament cross rope between the two longitudinal energy-absorbing beams at the front end of the longitudinal beam, and the two ends of the first filament cross rope are connected to the position of the longitudinal energy-absorbing beam close to the transverse anti-collision beam. When the vehicle collides with an external object, the external object collides with the transverse anti-collision beam and then collides with the first filament cross rope, instantly causing the first filament cross rope to deform backward, thereby causing the left and right longitudinal energy-absorbing beams to deform inward quickly, playing an energy-absorbing role. At the same time, when the first filament cross rope is deformed by collision, the misaligned friction of the internal filaments also plays an energy-absorbing role. Therefore, when the vehicle collides with an external object, the front subframe of the present invention can generate multiple buffering energy absorption, at least including the deformation energy absorption of the transverse anti-collision beam, the mutual friction energy absorption of the internal filaments of the first filament cross rope, and the deformation energy absorption of the longitudinal energy-absorbing beam, so that the collision performance of the front subframe is greatly improved. Moreover, since the tensile force generated by the deformation of the first filament cross rope responds quickly, the longitudinal energy-absorbing beam can be deformed inward quickly, thus avoiding the "insertion-type" damage of the front end of the longitudinal energy-absorbing beam to the external object. In summary, the front subframe of the present invention helps to improve the front collision safety performance of the automobile. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 is a three-dimensional schematic diagram of a front subframe provided by an embodiment of the present invention;

[0023] Figure 2 is a schematic top view of a front subframe provided by an embodiment of the present invention;

[0024] Figure 3 This is a force analysis diagram of the first filament cross rope of the front subframe provided by an embodiment of the present invention.

[0025] The markings in the figure are:

[0026] 100, longitudinal beam; 210, first cross beam; 220, second cross beam; 300, longitudinal energy absorbing beam; 301, induced deformation structure; 400, transverse anti-collision beam; 510, first thin wire cross rope; 520, second thin wire cross rope; 530, third thin wire cross rope; 600, tight sleeve energy absorbing tube; 700, first bracket; 800, second bracket; 900, installation sleeve. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0029] In the description of this specification, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0030] See also Figure 1~Figure 3 , an embodiment of the present invention provides a front sub-frame, including two relatively arranged longitudinal energy-absorbing beams 300 connected between the longitudinal beam 100 and the transverse anti-collision beam 400, and also including a first thin wire cross rope 510 arranged between the two longitudinal energy-absorbing beams 300, and the two ends of the first thin wire cross rope 510 are connected to the longitudinal energy-absorbing beam 300 near the transverse anti-collision beam 400. It should be understood that the front sub-frame has two longitudinal beams 100, i.e., one on the left and one on the right, and the longitudinal beam 100 belongs to the main skeleton of the front sub-frame and has strong strength and rigidity. The transverse anti-collision beam 400 is a component arranged at the front end position of the entire front sub-frame in the transverse direction, i.e., the left and right directions of the vehicle, and plays a role in buffering and energy absorption when the vehicle collides with external objects. Figure 1 and Figure 2In the exemplary embodiment, the transverse anti-collision beam 400 can be set to be an arch convex forward. The longitudinal energy-absorbing beam 300 is a component arranged at the front end of the longitudinal beam 100 along the longitudinal direction, that is, the front-to-rear direction of the vehicle. The longitudinal energy-absorbing beam 300 is arranged one-to-one with the longitudinal beam 100, connecting the front end of the longitudinal beam 100 and the transverse anti-collision beam 400, and plays a role in buffering and energy absorption when the vehicle collides with external objects. Since a first thin wire cross rope 510 is arranged between the two longitudinal energy-absorbing beams 300 near the transverse anti-collision beam 400, after the external object collides with the transverse anti-collision beam 400, it collides and contacts with the first thin wire cross rope 510, and instantly causes the first thin wire cross rope 510 to deform and move backward, such as Figure 3 As shown, within a very short time after the first filament cross rope 510 is hit, the first filament cross rope 510 is deformed into a V-shape with an angle close to 180°, that is, the angle θ formed between the two ends of the first filament cross rope 510 and the initial state before deformation is very small, and the collision force F1 causes the first filament cross rope 510 to generate a tension F2, and the relationship between the two is F2=F1 / (2sinθ). Since the angle θ is very small, a very large tension F2 can be generated under the action of the tiny collision force F1, thereby causing the left and right longitudinal energy absorbing beams 300 to deform inward quickly, thereby playing an energy absorbing role. It should be noted that "crossed filament rope" refers to a known steel wire rope with crossed filaments inside. Therefore, when the first cross-filament rope 510 is deformed by collision, the friction caused by the movement of the internal filaments also plays an energy-absorbing role (the inherent characteristics of the cross-filament rope). In this way, when the vehicle collides with external objects, the front subframe of the present invention can generate multiple buffering energy absorption, including at least the deformation energy absorption of the transverse anti-collision beam 400, the mutual friction energy absorption of the internal filaments of the first cross-filament rope 510, and the deformation energy absorption of the longitudinal energy-absorbing beam 300, so that the collision performance of the front subframe is greatly improved. At the same time, due to the rapid response of the tensile force generated by the deformation of the first cross-filament rope 510, the longitudinal energy-absorbing beam 300 can be deformed inward quickly, thus avoiding the "insertion-type" damage of the front end of the longitudinal energy-absorbing beam 300 to external objects. It can be seen that the front subframe of the present invention helps to improve the front collision safety performance of the automobile.

[0031] In some embodiments, the front subframe may include a tight-fitting energy-absorbing tube 600 sleeved on the first thin-filament cross rope 510. The inner wall of the tight-fitting energy-absorbing tube 600 is in close contact with the first thin-filament cross rope 510. When the tight-fitting energy-absorbing tube 600 is deformed by collision, the buffering energy absorption generated includes the bending deformation energy absorption of the tight-fitting energy-absorbing tube 600 itself and the motion dislocation friction energy absorption between the tight-fitting energy-absorbing tube 600 and the first thin-filament cross rope 510. Therefore, by setting the tight-fitting energy-absorbing tube 600, more buffering energy absorption can be generated.

[0032] In some embodiments, the front subframe may include a second cross-wire rope 520 and a third cross-wire rope 530 arranged in a cross pattern, and the same end of the second cross-wire rope 520 and the third cross-wire rope 530 are respectively connected to a position of the longitudinal energy absorbing beam 300 close to the transverse anti-collision beam 400 and a position of the longitudinal energy absorbing beam 300 close to the transverse anti-collision beam 400. Figure 1 and Figure 2 In the exemplary embodiment, the two ends of the second filament cross rope 520 can be connected to the root position of the left longitudinal energy absorbing beam 300 and the end position of the right longitudinal energy absorbing beam 300, respectively, and the two ends of the third filament cross rope 530 can be connected to the end position of the left longitudinal energy absorbing beam 300 and the root position of the right longitudinal energy absorbing beam 300, respectively, so that the second filament cross rope 520 and the third filament cross rope 530 are arranged in a cross, that is, arranged in an X shape. Due to the provision of the second filament cross rope 520 and the third filament cross rope 530, the longitudinal energy absorbing beam 300 can be pulled to deform in further movement and deformation, so that the deformation amplitude of the longitudinal energy absorbing beam 300 is larger, and its own energy absorption increases. At the same time, since the deformation amplitude of the longitudinal energy absorbing beam 300 is very large at this time, the root of the longitudinal energy absorbing beam 300 can be linked to generate complete deformation and energy absorption, so that the longitudinal energy absorbing beam 300 is more fully utilized.

[0033] In some embodiments, at least one of the first filament cross rope 510, the second filament cross rope 520, and the third filament cross rope 530 may be sleeved with a tight sleeve energy absorbing tube 600. That is, only one of the filament cross ropes may be sleeved with a tight sleeve energy absorbing tube 600, and the other two filament cross ropes may not be provided with a tight sleeve energy absorbing tube 600; only one of the filament cross ropes may not be provided with a tight sleeve energy absorbing tube 600, and the other two filament cross ropes may be sleeved with a tight sleeve energy absorbing tube 600 respectively; or all three filament cross ropes may be sleeved with a tight sleeve energy absorbing tube 600. It should be understood that the initial state of the filament cross rope after being installed on the longitudinal energy absorbing beam 300 is a taut straight line shape, so once it is bent and deformed, it will generate tension on the longitudinal energy absorbing beam 300. Of course, the tension of the filament cross rope in the initial state can be adjusted as needed. For example, the tension can be adjusted so that the filament cross rope has a small pulling force on the longitudinal energy absorbing beam 300 in the initial state, but this small pulling force is not enough to deform the longitudinal energy absorbing beam 300.

[0034] In some embodiments, a deformation inducing structure 301 may be provided on a side of at least one of the two longitudinal energy absorbing beams 300 that faces the other side. Figure 1 and Figure 2In the exemplary embodiment, both the left and right longitudinal energy absorbing beams 300 are provided with induced deformation structures 301 on the inner side, and the induced deformation structures 301 can make the longitudinal energy absorbing beams 300 more easily deformed, thereby improving the deformation response speed. Of course, in other embodiments, the induced deformation structure 301 can also be provided on only one of the longitudinal energy absorbing beams 300. In addition, it should be noted that, in the case where both longitudinal energy absorbing beams 300 are provided with induced deformation structures 301, the induced deformation structures 301 on the left and right longitudinal energy absorbing beams 300 can be of the same structure or of different structures, and the present invention does not limit this.

[0035] In some embodiments, the induced deformation structure 301 may include a corrugated structure formed by a plurality of grooves distributed along the length direction of the longitudinal energy absorbing beam 300. The length direction of the longitudinal energy absorbing beam 300 is the front-rear direction of the vehicle. The plurality of grooves formed on the inner side of the longitudinal energy absorbing beam 300 are arranged along the length direction of the longitudinal energy absorbing beam 300, and the whole structure is corrugated. It is easy to understand that in order to make the corrugated induced deformation structure 301 better play the role of inducing deformation, the groove should vertically penetrate the longitudinal energy absorbing beam 300, that is, the groove extends from the upper surface of the longitudinal energy absorbing beam 300 to the lower surface. Of course, in other embodiments, the induced deformation structure 301 can be set in other forms, for example, the induced deformation structure 301 can be set as a single groove structure.

[0036] In some embodiments, the front subframe may include a first crossbeam 210 and a second crossbeam 220 located between the two longitudinal beams 100, the first crossbeam 210 and the second crossbeam 220 are arranged parallel to each other, the two ends of the first crossbeam 210 connect the ends of the two longitudinal beams 100 close to the longitudinal energy absorbing beam 300, and the two ends of the second crossbeam 220 connect the ends of the two longitudinal beams 100 away from the longitudinal energy absorbing beam 300. That is, the first crossbeam 210 and the second crossbeam 220 form a square structure together with the two longitudinal beams 100. The square structure can make the main frame of the front subframe have higher overall strength and rigidity, thereby providing better support for the components such as the engine and the motor installed later. Of course, in other embodiments, the main frame of the front subframe can also be set to other shapes, for example, a main frame in the shape of H, Japanese character, etc. can be formed by setting a plurality of crossbeams between the two longitudinal beams 100.

[0037] In some embodiments, the front subframe may include three first brackets 700 distributed in a herringbone shape, wherein two first brackets 700 are fixed to the first crossbeam 210, and another first bracket 700 is fixed to the second crossbeam 220, and the three first brackets 700 together form a mounting structure for mounting a generator or a motor. In this way, a relatively stable mounting structure can be achieved with a small number of first brackets 700, which is conducive to cost saving. Of course, in other embodiments, the number and arrangement of the first brackets 700 can be appropriately adjusted as needed, for example, the first brackets 700 can be set to four, two of which are fixed to the first crossbeam 210, and the other two are fixed to the second crossbeam 220.

[0038] In some embodiments, the front subframe may include two second brackets 800, which are symmetrically arranged on the outer sides of the two longitudinal beams 100 near the second cross beam 220, and the second brackets 800 are used to install the wheel swing arm (not shown in the figure). The front subframe may include four vertically arranged mounting sleeves 900 for connecting the frame (not shown in the figure), wherein two mounting sleeves 900 are fixed at both ends of one longitudinal beam 100, and the other two mounting sleeves 900 are fixed at both ends of another longitudinal beam 100. Of course, the number of mounting sleeves 900 can be adjusted appropriately as needed, for example, set to six, eight, etc. It should be noted that the vertical arrangement of the mounting sleeve 900 means that the axis of the mounting sleeve 900 is along the vertical direction, that is, the up and down direction of the vehicle.

[0039] The present invention also provides a car, which includes the front subframe disclosed in the above embodiment. Since the front subframe disclosed in the above embodiment has the above technical effects, the car with the front subframe also has the above technical effects, which will not be described in detail herein.

[0040] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0041] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A front subframe, comprising two oppositely arranged longitudinal energy-absorbing beams connected between a longitudinal beam and a transverse anti-collision beam, and also comprising a first thin wire cross rope arranged between the two longitudinal energy-absorbing beams, wherein two ends of the first thin wire cross rope are connected to the longitudinal energy-absorbing beams near the transverse anti-collision beams.

2. The front subframe according to claim 1, characterized in that: It also includes a tight-fitting energy-absorbing tube sleeved on the first filament cross rope.

3. The front subframe according to claim 1, characterized in that: It also includes a second thin wire cross rope and a third thin wire cross rope arranged in a cross manner, and the same end of the second thin wire cross rope and the third thin wire cross rope are respectively connected to the position of the longitudinal energy absorbing beam close to the transverse anti-collision beam and the position of the longitudinal energy absorbing beam close to the transverse anti-collision beam.

4. The front subframe according to claim 3, characterized in that: At least one of the first thin-filament cross rope, the second thin-filament cross rope and the third thin-filament cross rope is sleeved with a tight sleeve energy absorbing tube.

5. The front subframe according to any one of claims 1 to 4, characterized in that: At least one of the two longitudinal energy absorbing beams is provided with an inducing deformation structure on the side facing the other side.

6. The front subframe according to claim 5, characterized in that: The induced deformation structure comprises a corrugated structure formed by a plurality of grooves distributed along the length direction of the longitudinal energy absorbing beam.

7. The front subframe according to claim 5, characterized in that: It includes a first cross beam and a second cross beam located between the two longitudinal beams, the first cross beam and the second cross beam are arranged parallel to each other, the two ends of the first cross beam are connected to the ends of the two longitudinal beams close to the longitudinal energy absorbing beam, and the two ends of the second cross beam are connected to the ends of the two longitudinal beams away from the longitudinal energy absorbing beam.

8. The front subframe according to claim 7, characterized in that: It comprises three first brackets distributed in a herringbone shape, wherein two of the first brackets are fixed to the first crossbeam, and another first bracket is fixed to the second crossbeam, and the three first brackets together form a mounting structure for mounting a generator or a motor.

9. The front subframe according to claim 8, characterized in that: include: Two second brackets are symmetrically arranged at the outer sides of the two longitudinal beams and close to the second cross beam, and the second brackets are used to install wheel swing arms; and / or, Four vertically arranged mounting sleeves for connecting the vehicle frame, wherein two of the mounting sleeves are fixed at two ends of one longitudinal beam, and the other two of the mounting sleeves are fixed at two ends of another longitudinal beam.

10. An automobile, characterized in that: It comprises a front subframe as described in any one of claims 1 to 9.

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