Frame front connecting structure and vehicle

Abstract

The vehicle frame front connecting structure comprises a first vehicle frame and a second vehicle frame, the first vehicle frame comprises a pair of first longitudinal beams, each first longitudinal beam comprises a front section, a middle section and a rear section which are sequentially connected in the length direction of the vehicle, and the front end of each middle section obliquely extends upwards; the height of the bottom surface of the front section is higher than that of the bottom surface of the rear section, so that an accommodating space is defined below the front sections of the pair of first longitudinal beams; the second frame is arranged in the containing space, the two sides of the front end of the second frame are fixedly connected to the lower sides of the front sections of the pair of first longitudinal beams respectively, and the two sides of the rear end of the second frame are fixedly connected to the lower sides of the middle sections of the pair of first longitudinal beams respectively. The accommodating space is formed below the first frame, and the second frame is arranged, so that the front arrangement space of the frame can be effectively improved; and meanwhile, the longitudinal beams of the second frame and the first frame are connected and fixed at four points, so that the torsional rigidity of the first frame can be improved, and the purpose of improving the performance quality of the whole vehicle is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle parts, and in particular to a front connection structure of a frame and a vehicle. Background Art

[0002] A non-load-bearing body refers to a body structure that fixes the engine, transmission system, and body assembly on a rigid frame, and then connects the frame to the wheels through front and rear suspension devices. Since the non-load-bearing body has a rigid frame running through the entire body structure, its chassis is stronger and has better anti-bumping performance. When the wheels are unevenly stressed due to bumpy roads, the frame can better withstand the pressure and will not be transmitted to the body, making it less likely for the body to twist and deform.

[0003] However, with the development of vehicle intelligence, the internal integrated components of the vehicle are becoming more and more abundant. The front layout of the existing non-load-bearing body includes the front shock absorber, front swing arm, front stabilizer bar, steering gear, suspension and other front suspension components are all assembled on the beam of the rigid frame, resulting in insufficient space for the front suspension layout and difficulty in space allocation, and it is often necessary to sacrifice performance, structure, size, etc. to make up for the shortcomings in the layout. Utility Model Content

[0004] In view of the above problems, the embodiments of the present application provide a front frame connection structure and a vehicle, which can effectively increase the front frame layout space without affecting the performance and quality of the entire vehicle, and solve the problems of insufficient front suspension layout space and difficult space allocation in the traditional layout and connection form.

[0005] According to one aspect of an embodiment of the present application, a front connection structure of a frame is provided, comprising: a first frame, the first frame comprising a pair of first longitudinal beams spaced apart in a vehicle width direction and extending in a vehicle length direction, the first longitudinal beam comprising a front section, a middle section and a rear section sequentially connected in the vehicle length direction, the front end of the middle section extending obliquely upward so that the bottom height of the front section is higher than the bottom height of the rear section, so as to define a receiving space below the front section of the pair of first longitudinal beams; and a second frame, the second frame is arranged in the receiving space, and both sides of the front end of the second frame are respectively fixedly connected to the lower side of the front section of the pair of first longitudinal beams, and both sides of the rear end of the second frame are respectively fixedly connected to the lower side of the middle section of the pair of first longitudinal beams.

[0006] In an exemplary embodiment of the present application, the first frame also includes a first cross beam and a second cross beam, the first cross beam and the second cross beam are arranged at intervals along the length direction of the vehicle, and the left and right ends of the first cross beam and the left and right ends of the second cross beam are respectively fixedly connected to the pair of first longitudinal beams to form a first annular structure.

[0007] In an exemplary embodiment of the present application, the second frame includes a third cross beam, a fourth cross beam and a pair of second longitudinal beams, the pair of second longitudinal beams are arranged at intervals along the vehicle width direction and extend along the vehicle length direction; the third cross beam and the fourth cross beam are arranged at intervals along the vehicle length direction, and the left and right ends of the third cross beam and the left and right ends of the fourth cross beam are respectively fixedly connected to the pair of second longitudinal beams to form a second annular structure.

[0008] In an exemplary embodiment of the present application, the second frame also includes a fifth cross beam, which is arranged between the third cross beam and the fourth cross beam, and the left and right ends of the fifth cross beam are respectively fixedly connected to the pair of second longitudinal beams; wherein, the distance between the fifth cross beam and the third cross beam in the vehicle length direction is greater than the distance between the fifth cross beam and the fourth cross beam in the vehicle length direction.

[0009] In an exemplary embodiment of the present application, the first frame also includes a connecting bracket, and the second frame is fixedly connected to the first longitudinal beam via the connecting bracket; the upper side of the connecting bracket is fixedly connected to the lower end surface of the first longitudinal beam, and the lower side is detachably fixedly connected to the second frame; wherein the connecting bracket is configured to have a certain design height in the vehicle height direction so that an installation space for arranging vehicle components is reserved between the second frame and the first longitudinal beam.

[0010] In an exemplary embodiment of the present application, the connecting bracket includes a base plate, a side plate, a connecting fastener and a bushing with a threaded hole, the upper side of the side plate is welded to the first longitudinal beam, and the lower side of the side plate is arranged around the circumference of the base plate to enclose a accommodating space between the first frame and the base plate; the base plate is provided with a through hole, and the bushing is arranged in the accommodating space corresponding to the through hole and is fixedly connected to the base plate; the second frame is provided with a connecting hole corresponding to the through hole and is arranged to pass through along the height direction of the vehicle, the connecting fastener is penetrated through the connecting hole and the through hole, and the first end of the connecting fastener is threadedly connected to the bushing, and the second end of the connecting fastener is fastened to the lower end surface of the second frame outside the connecting hole.

[0011] In an exemplary embodiment of the present application, the connecting bracket also includes an inner plate, which is arranged above the shaft sleeve and welded to the shaft sleeve, and the inner plate is fixedly connected to the side plate in the circumferential direction.

[0012] In an exemplary embodiment of the present application, the connecting fastener includes a detachably connected stud and a nut, both ends of the stud are provided with threads, the upper end of the stud is threadedly connected to the sleeve, the lower end of the stud extends out of the connecting hole and is threadedly connected to the nut, and is fastened to the lower end surface of the second frame by the nut.

[0013] In an exemplary embodiment of the present application, the second frame also includes a hollow sleeve, which is embedded in the connecting hole, and the two ends of the hollow sleeve extend out of the upper end surface of the connecting hole and the lower end surface of the connecting hole respectively, and the connecting fastener is passed through the hollow sleeve and the second end of the connecting fastener is fastened to the lower end surface of the hollow sleeve.

[0014] According to a second aspect of an embodiment of the present application, a vehicle is provided, comprising any one of the above-mentioned front frame connection structures.

[0015] The present application utilizes the accommodation space below the front section of the first frame to arrange the second frame. The first frame only needs to be equipped with a front shock absorber and the second frame. The assembly of the remaining front suspension components can be completed through the second frame, which can effectively increase the layout space of the front part of the frame and solve the problems of insufficient front suspension layout space and difficult space allocation in the traditional layout and connection form. At the same time, the second frame is connected and fixed to the longitudinal beams of the first frame at four points on the left and right sides of the front and rear ends, which can improve the connection stability of the first longitudinal beams and improve the torsional rigidity of the first frame, thereby achieving the purpose of improving the performance and quality of the whole vehicle.

[0016] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1 A schematic structural diagram of the front connection structure of the frame according to an embodiment of the present application is shown;

[0019] Figure 2 A schematic structural diagram of a second frame according to an embodiment of the present application is shown;

[0020] Figure 3 An exploded view of the front connection structure of the frame according to an embodiment of the present application is shown;

[0021] Figure 4 A cross-sectional view of a connecting bracket according to an embodiment of the present application is shown;

[0022] Figure 5A cross-sectional view of another connecting bracket described in an embodiment of the present application is shown.

[0023] Description of Figure Numbers:

[0024] 1-first frame, 11-first longitudinal beam, 111-front section, 112-middle section, 113-rear section, 12-accommodating space, 121-installation space, 13-first cross beam, 14-second cross beam, 15 / 15'-connecting bracket, 151 / 151'-bottom plate, 1511 / 1511'-through hole, 152 / 152'-side plate, 153-connecting fastener, 1531-long axis bolt, 1532-stud, 1533-nut, 154 / 154'-sleeve, 155 / 155'-inner plate,

[0025] 2-second frame, 21-second longitudinal beam, 22-third cross beam, 23-fourth cross beam, 24-fifth cross beam, 25 / 25'-connecting hole, 251 / 251'-hollow sleeve.

[0026] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0028] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0029] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application.

[0030] like Figures 1 to 3As shown, this embodiment provides a front frame connection structure, including a first frame 1 and a second frame 2, the first frame 1 includes a pair of first longitudinal beams 11, the pair of first longitudinal beams 11 are arranged at intervals along the vehicle width direction (i.e., the left-right direction) and extend along the vehicle length direction (i.e., the front-back direction), the first longitudinal beam 11 includes a front section 111, a middle section 112 and a rear section 113 connected in sequence along the vehicle length direction, the front end of the middle section 112 extends upwardly inclined, and the bottom surface height of the front section 111 is higher than the bottom surface height of the rear section 113 in the vehicle height direction (i.e., the up-down direction), so as to define a receiving space 12 below the front section 111 of the pair of first longitudinal beams 11; the second frame 2 can be arranged through the receiving space 12 below the front section 111 of the first frame 1, so that the first frame Only the front shock absorber and the second frame 2 need to be configured, and the assembly of the remaining front suspension components can be completed through the second frame 2, which can effectively increase the layout space of the front part of the frame and solve the problems of insufficient layout space and difficult space allocation of the front suspension layout in the traditional layout and connection form; at the same time, when the second frame 2 is arranged in the receiving space 12, the two sides of the front end of the second frame 2 are respectively fixedly connected to the lower side of the front section 111 of the pair of first longitudinal beams 11, and the two sides of the rear end of the second frame 2 are respectively fixedly connected to the lower side of the middle section 112 of the pair of first longitudinal beams 11, and the fixed connection method includes but is not limited to welding or bolt connection, etc., so that the second frame 2 can be connected and fixed to the longitudinal beam of the first frame 1 at four points on the left and right sides of the front and rear ends, thereby improving the torsional rigidity of the first frame 1 and achieving the purpose of improving the performance and quality of the whole vehicle.

[0031] It can be understood that the above-mentioned first frame 1 is a structural feature of the front part of the frame, and the rear section 113 of the first longitudinal beam 11 thereof can extend backward along the length direction of the vehicle to form a frame beam including the middle part and the rear part of the frame, or, be fixedly connected with the longitudinal beams including the middle part and the rear part of the frame to form a frame beam, which will not be repeated here.

[0032] In some embodiments, Figure 1 As shown, the first frame 1 also includes a first cross beam 13 and a second cross beam 14, which are spaced apart along the length direction of the vehicle, and the left and right ends of the first cross beam 13 and the left and right ends of the second cross beam 14 are respectively fixedly connected to the pair of first longitudinal beams 11 to form a first annular structure, thereby improving the rigidity of the first frame 1.

[0033] For example, Figure 1As shown, in this embodiment, the first cross beam 13 is arranged below the front section 111 of the first longitudinal beam 11, and its left and right ends are respectively connected upward to the lower end surfaces of the pair of first longitudinal beams 11; the second cross beam 14 is arranged at the rear section 113 of the first longitudinal beam 11, and its left and right ends are respectively connected to the relatively inner side surfaces of the rear section 113 of the pair of first longitudinal beams 11, so that the first cross beam 13, the second cross beam 14 and the pair of first longitudinal beams 11 are connected to each other to form a first annular structure that is annular and integrated, and the first cross beam 13 can provide lateral support and greater lateral constraints for the end of the first longitudinal beam 11 on the front side, and the second cross beam 14 can provide lateral constraints and greater lateral support for the first longitudinal beam 11 on the rear side, thereby optimizing the force transmission of the first frame 1. At the same time, since the front end and the rear end of the second frame 2 are respectively fixed to the front section 111 and the middle section 112 of the pair of first longitudinal beams 11, the distance between the first cross beam 13 and the second cross beam 14 is greater than the length of the second frame 2 in the vehicle length direction, forming an assembly form with a larger top and a smaller bottom in the vehicle height direction, which helps to improve the overall structural performance of the front part and is conducive to space layout.

[0034] In some embodiments, Figure 1 and Figure 2 As shown, the second frame 2 includes a third cross beam 22, a fourth cross beam 23 and a pair of second longitudinal beams 21, the pair of second longitudinal beams 21 are spaced apart along the vehicle width direction and extend along the vehicle length direction; the third cross beam 22 and the fourth cross beam 23 are spaced apart along the vehicle length direction, and the left and right ends of the third cross beam 22 and the left and right ends of the fourth cross beam 23 are respectively fixedly connected to the pair of second longitudinal beams 21 to form a second annular structure, thereby improving the rigidity of the second frame 2.

[0035] For example, Figures 1 to 3 As shown, in this embodiment, the third cross beam 22 is arranged at the front end of the pair of second longitudinal beams 21, and the left and right ends thereof are respectively connected to the relatively inner side surfaces of the front ends of the pair of second longitudinal beams 21; the fourth cross beam 23 is arranged at the rear end of the second longitudinal beam 21, and the left and right ends thereof are respectively connected to the ends at the rear ends of the pair of first longitudinal beams 11, so that the third cross beam 22, the fourth cross beam 23 and the pair of second longitudinal beams 21 are connected to each other to form a second annular structure with an annular integral structure, and the third cross beam 22 can provide lateral constraints and greater lateral support for the ends of the second longitudinal beam 21 on the front side, and the fourth cross beam 23 can provide lateral support and greater lateral constraints for the second longitudinal beam 21 on the rear side, thereby optimizing the force transmission of the second frame 2.

[0036] It can be understood that the above-mentioned lateral support can be understood as the reaction force provided by the cross beam to the longitudinal beam from the middle to the two sides in the vehicle width direction, and the above-mentioned lateral constraint can be understood as the reaction force provided by the cross beam to the longitudinal beam from the two sides to the middle in the vehicle width direction, so as to optimize the stress distribution difference between the end and the middle of the longitudinal beam.

[0037] In some embodiments, Figure 2 As shown, the second frame 2 further includes a fifth cross beam 24, which is arranged between the third cross beam 22 and the fourth cross beam 23, and the left and right ends of the fifth cross beam 24 are respectively fixedly connected to the opposite inner side surfaces of the pair of second longitudinal beams 21. By setting the fifth cross beam 24, the assembly area of ​​the second frame 2 for mounting components can be increased, and the structural strength of the second frame 2 can be further improved; wherein, the distance between the fifth cross beam 24 and the third cross beam 22 in the vehicle length direction is greater than the distance between the fifth cross beam 24 and the fourth cross beam 23 in the vehicle length direction. Preferably, the spacing between the fifth cross beam 24 and the third cross beam 22 in the vehicle length direction is X, the spacing between the fifth cross beam 24 and the fourth cross beam 23 in the vehicle length direction is Y, and the numerical difference between X and Y is X>2Y. In this way, the fifth cross beam 24 and the fourth cross beam 23 can form a compact assembly area to improve the connection stability, and the front suspension components can be assembled at the rear, leaving a buffer space between the fifth cross beam 24 and the third cross beam 22 to reduce damage to the front suspension components when the vehicle has a head-on collision.

[0038] In some embodiments, Figures 3 to 5 As shown, the first frame 1 also includes a connecting bracket 15 / 15', and the second frame 2 is fixedly connected to the first longitudinal beam 11 through the connecting bracket 15 / 15'; the upper side of the connecting bracket 15 / 15' is fixedly connected to the lower end surface of the first longitudinal beam 11, and the lower side is detachably fixedly connected to the second frame 2; wherein the connecting bracket 15 / 15' is configured to have a certain design height in the vehicle height direction, so that an installation space 121 for arranging vehicle components is reserved between the second frame 2 and the first longitudinal beam 11. In this way, by setting the connecting bracket 15 / 15', on the one hand, the connection and assembly of the second frame 2 and the first frame 1 can be facilitated, and on the other hand, the layout space size of the front part of the frame can be further increased, solving the problem of insufficient front suspension layout space and difficult space allocation in the traditional layout connection form.

[0039] For example, Figures 3 to 5As shown, in this embodiment, there are four connecting brackets in total, including connecting brackets 15 respectively fixed to the lower side of the front sections 111 of the two first longitudinal beams 11 and connecting brackets 15' respectively fixed to the lower side of the middle sections 112 of the two first longitudinal beams 11. Taking the connecting bracket 15 connected to the front section 111 of the first longitudinal beam 11 as an example, the connecting bracket 15 includes a bottom plate 151, a side plate 152, a connecting fastener 153 and a sleeve 154 with a threaded hole. The upper side of the side plate 152 is welded to the first longitudinal beam 11, and the lower side of the side plate 152 is arranged around the circumference of the bottom plate 151 to enclose an accommodation space between the first longitudinal beam 11 and the bottom plate 151; the bottom plate 151 is provided with a through hole 1511, and the sleeve 154 is arranged in the accommodation space corresponding to the through hole 1511 and is fixedly connected to the bottom plate 151; the second frame 2 is provided with a through hole 1511 along the vehicle height direction The connecting hole 25 is set through, and the connecting fastener 153 can adopt two long axis bolts 1531. The first end of the long axis bolt 1531 is provided with a thread, and the size of the second end is larger than the aperture of the connecting hole 25. In this way, the two long axis bolts 1531 are passed through the connecting hole 25 and the through hole 1511 from below the connecting hole 25, so that the first end of the long axis bolt 1531 is threadedly connected with the shaft sleeve 154, and the second end of the long axis bolt 1531 is fastened to the lower end surface of the second frame 2 outside the connecting hole 25, that is, the fastening connection between the second frame 2 and the connecting bracket 15 is completed, and the second frame 2 and the first frame 1 are firmly assembled. Similarly, the above-mentioned connecting bracket 15' also includes a bottom plate 151', a side plate 152', a connecting fastener 153 and a sleeve 154' with a threaded hole, and the bottom plate 151' and the second frame 2 are also provided with corresponding through holes 1511' and connecting holes 25'. The connection method and the effect achieved are the same as those of the above-mentioned connecting bracket 15, which will not be repeated here.

[0040] It is understandable that the upper side of the side plate 152 can be adapted to the shape of the lower end surface of the first longitudinal beam 11 so as to be firmly connected to the first longitudinal beam 11. For example, the lower side of the front section 111 of the first longitudinal beam 11 is a horizontal surface, so the upper side of the side plate 152 of the connecting bracket 15 connected to the front section 111 of the first longitudinal beam 11 is formed into a flush box shape, and a flange is extended accordingly to be attached to the horizontal surface for a firmly connected; and the lower side of the middle section 112 of the first longitudinal beam 11 has an inclined surface, so the upper side of the side plate 152' of the connecting bracket 15' connected to the middle section 112 of the first longitudinal beam 11 is formed into a wedge shape adapted to the inclined surface, and a flange is extended accordingly to be attached to the inclined surface for a firmly connected.

[0041] Preferably, the front side of the side plate 152 of the connecting bracket 15 connected to the front section 111 of the first longitudinal beam 11 may also be extended to form a flange to be welded to the underlying first cross beam 13 to improve the connection stability of the connecting bracket 15 .

[0042] In some embodiments, Figure 4 and Figure 5 As shown, the connecting bracket 15 / 15' also includes an inner plate 155 / 155', which is arranged above the sleeve 154 / 154' and welded to the sleeve 154 / 154', and the inner plate 155 / 155' can be fixedly connected to the side plate 152 / 152' in the circumferential direction by welding. Through the arrangement of the inner plate 155 / 155', on the one hand, the rigidity of the connecting bracket 15 / 15' can be improved, and on the other hand, a connecting base can be provided for the upper end of the sleeve 154 / 154', thereby improving the connection stability of the sleeve 154 / 154'.

[0043] In some embodiments, Figure 5 As shown, the connecting fastener 153 can also be a detachably connected stud 1532 and nut 1533, wherein, taking the connecting bracket 15' connected to the middle section 112 of the first longitudinal beam 11 as an example, the two ends of the stud 1532 are provided with threads, and the size of the nut 1533 is larger than the aperture of the connecting hole 25'; the upper end of the stud 1532 is inserted into the through hole 1511' and threadedly connected with the shaft sleeve 154', and then the second frame 2 is aligned and moved up to the lower end of the stud 1532, inserted from above the connecting hole 25' and extended from below the connecting hole 25', and the nut 1533 is threadedly connected with the stud 1532, so that the nut 1533 is fastened to the lower end surface of the second frame 2, that is, the fastening connection between the second frame 2 and the connecting bracket 15' is completed, and the second frame 2 and the first frame 1 are stably assembled. In this way, the stud 1532 can be used as a pre-installation positioning reference to facilitate the installation and positioning of the second frame 2 and improve assembly efficiency.

[0044] In some embodiments, Figures 3 to 5 As shown, the second frame 2 also includes a hollow sleeve 251 / 251', which can be embedded and fixed in the connecting hole 25 / 25' by welding, and the two ends of the hollow sleeve 251 / 251' extend out of the upper end surface of the connecting hole 25 / 25' and the lower end surface of the connecting hole 25 / 25' respectively. When the second frame 2 is connected to the connecting bracket 15 / 15', the connecting fastener 153 is passed through the hollow sleeve 251 / 251' and the second end of the connecting fastener 153 is fastened to the lower end surface of the hollow sleeve 251 / 251'. In this way, when the connecting fastener 153 is tightened by torque, force support can be provided by the hollow sleeve 251 / 251' to prevent the second frame 2 from deforming at the connecting hole 25 / 25', thereby improving the connection stability between the first frame 1 and the second frame 2.

[0045] In addition, in another embodiment, a vehicle is provided, including the front frame connection structure of the above embodiment. For other structures and working principles of the front frame connection structure, please refer to the above description of the embodiment of the front frame connection structure. Since the front frame connection structure has the above technical effects, the vehicle having the front frame connection structure should also have the corresponding technical effects, which will not be repeated here.

[0046] It is understood that in this application, unless otherwise clearly specified and limited, the terms "assembly", "connection" and the like should be understood in a broad sense, for example, it 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 or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined. And the description of the terms "some embodiments", "exemplarily", 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.

[0048] The schematic representations of the above terms do not necessarily refer to the same embodiment or example. 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 different embodiments or examples and features of different embodiments or examples described in this specification without contradicting each other.

[0049] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and description of the present application should fall within the scope of the patent of this application.

Claims

1. A front connection structure of a frame, characterized in that: include: a first vehicle frame, the first vehicle frame comprising a pair of first longitudinal beams spaced apart in a vehicle width direction and extending in a vehicle length direction, the first longitudinal beam comprising a front section, a middle section and a rear section sequentially connected in the vehicle length direction, the front end of the middle section extending obliquely upward so that the bottom height of the front section is higher than the bottom height of the rear section, so as to define a receiving space below the front section of the pair of first longitudinal beams; and The second frame is arranged in the accommodating space, and the two sides of the front end of the second frame are respectively fixedly connected to the lower sides of the front sections of the pair of first longitudinal beams, and the two sides of the rear end of the second frame are respectively fixedly connected to the lower sides of the middle sections of the pair of first longitudinal beams.

2. The front connection structure of the frame according to claim 1, characterized in that: The first frame also includes a first crossbeam and a second crossbeam, which are spaced apart along the length direction of the vehicle, and the left and right ends of the first crossbeam and the left and right ends of the second crossbeam are respectively fixedly connected to the pair of first longitudinal beams to form a first annular structure.

3. The front connection structure of the frame according to claim 2, characterized in that: The second frame includes a third cross beam, a fourth cross beam and a pair of second longitudinal beams, the pair of second longitudinal beams are arranged at intervals along the vehicle width direction and extend along the vehicle length direction; the third cross beam and the fourth cross beam are arranged at intervals along the vehicle length direction, and the left and right ends of the third cross beam and the left and right ends of the fourth cross beam are respectively fixedly connected to the pair of second longitudinal beams to form a second annular structure.

4. The front connection structure of the frame according to claim 3, characterized in that: The second frame further includes a fifth cross beam, which is disposed between the third cross beam and the fourth cross beam, and the left and right ends of the fifth cross beam are respectively fixedly connected to the pair of second longitudinal beams; Wherein, a distance between the fifth cross beam and the third cross beam in the vehicle length direction is greater than a distance between the fifth cross beam and the fourth cross beam in the vehicle length direction.

5. The front connection structure of the frame according to any one of claims 1 to 4, characterized in that: The first frame further includes a connecting bracket, and the second frame is fixedly connected to the first longitudinal beam through the connecting bracket; the upper side of the connecting bracket is fixedly connected to the lower end surface of the first longitudinal beam, and the lower side is detachably fixedly connected to the second frame; The connecting bracket is configured to have a certain design height in the vehicle height direction, so that an installation space for arranging vehicle components is reserved between the second frame and the first longitudinal beam.

6. The front connection structure of the frame according to claim 5, characterized in that: The connecting bracket includes a bottom plate, a side plate, a connecting fastener and a sleeve with a threaded hole, the upper side of the side plate is welded to the first longitudinal beam, and the lower side of the side plate is arranged around the circumference of the bottom plate to enclose a accommodating space between the first longitudinal beam and the bottom plate; the bottom plate is provided with a through hole, and the sleeve is arranged in the accommodating space corresponding to the through hole and is fixedly connected to the bottom plate; the second frame is provided with a connecting hole corresponding to the through hole and is arranged to pass through along the height direction of the vehicle, the connecting fastener is penetrated through the connecting hole and the through hole, and the first end of the connecting fastener is threadedly connected to the sleeve, and the second end of the connecting fastener is fastened to the lower end surface of the second frame outside the connecting hole.

7. The front connection structure of the frame according to claim 6, characterized in that: The connecting bracket also includes an inner plate, which is arranged above the shaft sleeve and is welded to the shaft sleeve, and the inner plate is fixedly connected to the side plate in the circumferential direction.

8. The vehicle frame front connection structure according to claim 7, characterized in that: The connecting fastener includes a detachably connected stud and a nut, both ends of the stud are provided with threads, the upper end of the stud is threadedly connected to the sleeve, the lower end of the stud extends out of the connecting hole and is threadedly connected to the nut, and is fastened to the lower end surface of the second frame through the nut.

9. The front connection structure of the frame according to any one of claims 6 to 8, characterized in that: The second frame also includes a hollow sleeve, which is embedded in the connecting hole, and the two ends of the hollow sleeve extend out of the upper end surface of the connecting hole and the lower end surface of the connecting hole respectively, the connecting fastener is passed through the hollow sleeve and the second end of the connecting fastener is fastened to the lower end surface of the hollow sleeve.

10. A vehicle, characterized in that: It comprises the front connection structure of the frame as described in any one of claims 1-9.

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