Vehicle body frame variable cross-section reinforcer, frame closed ring, vehicle body frame and vehicle

Abstract

The utility model belongs to the field of vehicle body upper structure assemblies, and particularly provides a vehicle body framework variable cross-section reinforcer, a framework closed ring, a vehicle body framework and a vehicle. The variable cross-section reinforcer comprises an integrally-formed main body, a variable cross-section section is arranged in the middle of the main body in the extending direction, the outline where the cross section of the variable cross-section section is located is gradually enlarged from the two ends to the middle, and the two ends of the main body are connecting ends used for being connected with corresponding structural beams of a vehicle body framework. The framework closed ring, the vehicle body framework and the vehicle all comprise the variable cross-section reinforcer. When the variable cross-section reinforcer of the vehicle body framework is applied to the vehicle body framework, the strength of the vehicle body framework can be improved. Meanwhile, the variable cross-section reinforcer is of an integrally-formed structure, welding seams do not exist, the integrity is higher, and the reliability of long-term use is higher.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle body upper structure assembly, and specifically relates to a variable cross-section reinforcement for vehicle body frame, frame closing ring, vehicle body frame and vehicle. Background Technology

[0002] As the tourism market expands, passengers' demands for bus comfort are constantly increasing. Widening and increasing the height of bus interiors is a current trend. However, increasing the height and width of the bus body places higher demands on rollover resistance. Increasing the cross-sectional dimensions of the side pillars of the frame would further reduce interior space, narrowing seat and aisle widths, thus affecting passenger comfort and passageway accessibility.

[0003] Therefore, the current standard practice is to reinforce key areas locally. For a closed-loop frame including the top crossbeam, side columns, and bottom crossbeam, structural adjustments are mainly made at the middle (waist) and top positions. For example... Figure 1 As shown, for the central reinforcement position, a reinforcing member 5 is typically welded at the connection point between the lintel 1 and the column 2 to enhance the strength of the central area. For example... Figure 2 As shown, for the top reinforcement position, reinforcement members 5 are welded at the connection positions of column 2, top crossbeam 4 and side longitudinal beam 3 to enhance the strength of the top position.

[0004] While the above methods can improve the strength of the frame, they tend to increase the overall vehicle weight significantly, which is not conducive to weight reduction. Moreover, the large welding area can easily cause severe heat deformation of the pillars and also makes welding operations inconvenient.

[0005] A search revealed that the utility model patent with authorization announcement number CN 217554011U discloses a bus side pillar and a bus. The side pillar includes a door pillar, a window pillar, and a variable cross-section reinforcement. The variable cross-section reinforcement connects the door pillar and the window pillar. Specifically, the two ends of the variable cross-section reinforcement can be inserted into the door pillar and the window pillar respectively, and then welded.

[0006] The aforementioned patent discloses a solution that uses a separate variable cross-section reinforcement connected to key locations on the vehicle body frame where strength enhancement is needed. However, this variable cross-section reinforcement is actually welded from sheet metal, resulting in numerous weld seams and a lack of integrity. During normal use, these weld seams can easily become weak points under stress, leading to low reliability. Utility Model Content

[0007] The purpose of this invention is to provide a variable cross-section reinforcement for a vehicle body frame, thereby addressing the technical problem of insufficient reliability in existing welded variable cross-section reinforcements. Another purpose of this invention is to provide a frame closure ring, a vehicle body frame, and a vehicle, thereby addressing the technical problem of insufficient strength in the frame closure ring.

[0008] To achieve the above objectives, the technical solution for the variable cross-section reinforcement component for the vehicle body frame provided by this utility model is as follows:

[0009] A variable cross-section reinforcement for a vehicle body frame includes an integrally formed main body, a variable cross-section section in the middle of the main body extending in the direction of extension, the profile of the cross-section of the variable cross-section section gradually increases from both ends to the middle, and the two ends of the main body are connection ends for connecting with the corresponding structural beams of the vehicle body frame.

[0010] As a further improvement, the connection end is a plug-in end for interlocking with the corresponding structural beam.

[0011] As a further improvement, the two ends of the main body are provided with a narrowing structure so that the plug-in end constitutes a plug-in male end for insertion into the corresponding structural beam.

[0012] As a further improvement, the main body is integrally formed by thermal expansion or cold pressing.

[0013] This utility model is a pioneering invention, and its beneficial effects are as follows: This utility model proposes a novel one-piece molded variable cross-section reinforcement component that can be used to strengthen the body frame. Specifically, the contour of the variable cross-section section in the middle of the main body gradually increases from both ends towards the middle. In use, corresponding structural beams at key locations of the body frame can be connected as needed, thereby improving the strength of the body frame. Unlike existing technologies, the variable cross-section reinforcement component is a one-piece molded structure without welds, resulting in stronger integrity and higher reliability in long-term use.

[0014] To achieve the above objectives, the technical solution for the skeleton closure ring provided by this utility model is as follows:

[0015] A closed-loop skeleton includes two side columns and a top crossbeam. The two ends of the top crossbeam are connected to the two side columns via top variable cross-section reinforcement members. The top variable cross-section reinforcement member is an integrally formed structure with a variable cross-section segment in its middle extension direction. The profile of the cross-section of the variable cross-section segment gradually increases from both ends towards the middle; and / or

[0016] The column includes an upper column and a lower column, which are connected by a central variable cross-section reinforcement. The central variable cross-section reinforcement is an integrally formed structure, and a variable cross-section section is provided in the middle of its extension direction. The profile of the cross-section of the variable cross-section section gradually increases from both ends to the middle.

[0017] As a further improvement, for the case with a top variable cross-section reinforcement, the two ends of the top variable cross-section reinforcement are plug-in ends that interlock with the top crossbeam and the column, respectively; for the case with a middle variable cross-section reinforcement, the two ends of the middle variable cross-section reinforcement are plug-in ends that interlock with the upper and lower columns, respectively.

[0018] As a further improvement, for the case with a top variable cross-section reinforcement, the two ends of the top variable cross-section reinforcement are provided with a narrowing structure so that the plug-in end of the top variable cross-section reinforcement forms a plug-in male end that can be inserted into the top crossbeam and the column respectively; for the case with a middle variable cross-section reinforcement, the two ends of the middle variable cross-section reinforcement are provided with a narrowing structure so that the plug-in end of the middle variable cross-section reinforcement forms a plug-in male end that can be inserted into the upper and lower columns respectively.

[0019] As a further improvement, for cases with a top variable cross-section reinforcement, the top variable cross-section reinforcement is integrally formed by thermal expansion or cold pressing; for cases with a middle variable cross-section reinforcement, the middle variable cross-section reinforcement is integrally formed by thermal expansion or cold pressing.

[0020] This utility model is an improved invention, and its beneficial effects are: the key locations requiring reinforcement in the skeleton closed ring, namely the top and middle positions, can be reinforced with corresponding variable cross-section reinforcements. These reinforcements serve both a connecting function and, through their variable cross-section sections, enhance strength. Unlike existing technologies, the variable cross-section reinforcements are integrally molded structures without welds, resulting in stronger integrity and higher reliability over long-term use.

[0021] To achieve the above objectives, the technical solution for the vehicle body frame provided by this utility model is as follows:

[0022] A vehicle body frame includes a waist beam, side longitudinal beams, and multiple longitudinally arranged frame closed rings. At least a portion of the frame closed rings includes two side pillars and a top crossbeam. The two ends of the top crossbeam are connected to the two side pillars via top variable cross-section reinforcement members. The top variable cross-section reinforcement member is an integrally formed structure with a variable cross-section section in its middle along its extension direction. The profile of the cross-section of the variable cross-section section gradually increases from both ends towards the middle; and / or

[0023] The column includes an upper column and a lower column, which are connected by a central variable cross-section reinforcement. The central variable cross-section reinforcement is an integrally formed structure, and a variable cross-section section is provided in the middle of its extension direction. The profile of the cross-section of the variable cross-section section gradually increases from both ends to the middle.

[0024] As a further improvement, for the case with a top variable cross-section reinforcement, the two ends of the top variable cross-section reinforcement are plug-in ends that interlock with the top crossbeam and the column, respectively; for the case with a middle variable cross-section reinforcement, the two ends of the middle variable cross-section reinforcement are plug-in ends that interlock with the upper and lower columns, respectively.

[0025] As a further improvement, for the case with a top variable cross-section reinforcement, the two ends of the top variable cross-section reinforcement are provided with a narrowing structure so that the plug-in end of the top variable cross-section reinforcement forms a plug-in male end that can be inserted into the top crossbeam and the column respectively; for the case with a middle variable cross-section reinforcement, the two ends of the middle variable cross-section reinforcement are provided with a narrowing structure so that the plug-in end of the middle variable cross-section reinforcement forms a plug-in male end that can be inserted into the upper and lower columns respectively.

[0026] As a further improvement, for cases with a top variable cross-section reinforcement, the top variable cross-section reinforcement is integrally formed by thermal expansion or cold pressing; for cases with a middle variable cross-section reinforcement, the middle variable cross-section reinforcement is integrally formed by thermal expansion or cold pressing.

[0027] This utility model is an improved invention, and its beneficial effects are: at least a portion of the frame closure rings used in the vehicle body frame are integral variable cross-section reinforcements, which can improve the overall strength of the vehicle body frame. Unlike existing technologies, the variable cross-section reinforcement is an integrally formed structure without welds, resulting in stronger integrity and higher reliability in long-term use.

[0028] To achieve the above objectives, the technical solution for the vehicle provided by this utility model is as follows:

[0029] A vehicle includes a body, the body including a body frame, the body frame including waist beams, side longitudinal beams, and multiple longitudinally arranged frame closed rings, at least a portion of the frame closed rings including side pillars and a top crossbeam, the two ends of the top crossbeam being connected to the side pillars via top variable cross-section reinforcement members, the top variable cross-section reinforcement members being an integrally formed structure, having a variable cross-section section in the middle of its extending direction, the profile of the variable cross-section section gradually increasing from both ends towards the middle; and / or

[0030] The column includes an upper column and a lower column, which are connected by a central variable cross-section reinforcement. The central variable cross-section reinforcement is an integrally formed structure, and a variable cross-section section is provided in the middle of its extension direction. The profile of the cross-section of the variable cross-section section gradually increases from both ends to the middle.

[0031] As a further improvement, for the case with a top variable cross-section reinforcement, the two ends of the top variable cross-section reinforcement are plug-in ends that interlock with the top crossbeam and the column, respectively; for the case with a middle variable cross-section reinforcement, the two ends of the middle variable cross-section reinforcement are plug-in ends that interlock with the upper and lower columns, respectively.

[0032] As a further improvement, for the case with a top variable cross-section reinforcement, the two ends of the top variable cross-section reinforcement are provided with a narrowing structure so that the plug-in end of the top variable cross-section reinforcement forms a plug-in male end that can be inserted into the top crossbeam and the column respectively; for the case with a middle variable cross-section reinforcement, the two ends of the middle variable cross-section reinforcement are provided with a narrowing structure so that the plug-in end of the middle variable cross-section reinforcement forms a plug-in male end that can be inserted into the upper and lower columns respectively.

[0033] As a further improvement, for cases with a top variable cross-section reinforcement, the top variable cross-section reinforcement is integrally formed by thermal expansion or cold pressing; for cases with a middle variable cross-section reinforcement, the middle variable cross-section reinforcement is integrally formed by thermal expansion or cold pressing.

[0034] This utility model is an improved invention, and its beneficial effects are: at least a portion of the frame closure rings used in the vehicle body frame are integral variable cross-section reinforcements, which can improve the overall strength of the vehicle body frame. Unlike existing technologies, the variable cross-section reinforcement is an integrally formed structure without welds, resulting in stronger integrity and higher reliability in long-term use. Attached Figure Description

[0035] Figure 1 A schematic diagram illustrating one implementation of a structure reinforcement method in the middle position using existing technology;

[0036] Figure 2 This is a schematic diagram of one embodiment of the prior art involving strengthening the structure at the top position;

[0037] Figure 3 This is a schematic diagram of the structure of the skeleton closed ring embodiment of this utility model;

[0038] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0039] Figure 5 for Figure 3 A magnified view of a section at point B in the middle;

[0040] Figure 6 for Figure 3 A partial schematic diagram of the insertion positions of the lower column and the central variable cross-section reinforcement.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Waist beam; 2. Column; 3. Side longitudinal beam; 4. Top transverse beam; 5. Reinforcing member; 6. Middle variable cross-section reinforcing member; 7. Top variable cross-section reinforcing member; 201. Upper column; 202. Lower column. Detailed Implementation

[0043] To address the reliability issues of welded variable cross-section reinforcements, the basic technical concept of this invention is to provide a one-piece molded variable cross-section reinforcement. This one-piece reinforcement eliminates weld seams, resulting in greater overall integrity and higher reliability over long-term use. Of course, at its most fundamental level, the variable cross-section reinforcement should serve both as a connecting element to the corresponding structural beams and as a strengthening element to increase overall strength.

[0044] Based on the above concept, the present invention will be further described in detail below with reference to different embodiments.

[0045] Specific embodiments of the skeleton closure ring provided by this utility model:

[0046] The overall composition of the frame enclosure ring provided in this embodiment is largely the same as that of the prior art, including a top crossbeam 4, left and right side columns 2 (side columns 2), and a bottom crossbeam (not shown in the figure). Considering that the middle position experiences greater stress and the top position will land first during a rollover, these two positions are selected as critical positions and reinforced accordingly. Specifically, a one-piece molded variable cross-section reinforcing member can be used to reinforce the critical positions.

[0047] like Figure 3 and Figure 4 As shown, column 2 comprises upper and lower parts, which can be defined as upper column 201 and lower column 202, respectively. Upper column 201 and lower column 202 are connected by a variable cross-section reinforcement. For ease of understanding, since this variable cross-section reinforcement is located in the middle, it can be defined as the middle variable cross-section reinforcement 6. The middle variable cross-section reinforcement 6 is a one-piece molded structure. In its extension direction, a variable cross-section segment is provided in the middle. The profile of the cross-section of this segment gradually increases from both ends towards the middle. This means that the variable cross-section reinforcement can provide localized reinforcement, increasing the strength of the closed ring of the skeleton without causing the overall width to be excessive. For the middle variable cross-section reinforcement 6 itself, its two ends are connection ends used to connect with the upper column 201 and lower column 202, respectively.

[0048] like Figure 3 and Figure 5As shown, the two ends of the top crossbeam 4 are also connected by variable cross-section reinforcement members. Similarly, for ease of understanding, this variable cross-section reinforcement member can be defined as the top variable cross-section reinforcement member 7. The top variable cross-section reinforcement member 7 is a one-piece molded structure. In its extension direction, a variable cross-section section is provided in the middle position. Similarly, the profile of the cross-section of the variable cross-section section gradually increases from both ends to the middle, which can also play a role in local reinforcement. Of course, since the top crossbeam 4 and the column 2 connected to the top variable cross-section reinforcement member 7 have different extension directions, the top variable cross-section reinforcement member 7 has an overall inwardly curved arc structure. As for the top variable cross-section reinforcement member 7 itself, its two ends are the connection ends used to connect with the top crossbeam 4 and the column 2, respectively.

[0049] Specifically, in this embodiment, the top variable cross-section reinforcement 7 and the middle variable cross-section reinforcement 6 can be integrally formed based on existing profiles using either thermal expansion or cold pressing processes. Both of these processes are existing and mature technologies. Taking thermal expansion as an example, a rectangular profile of a certain type with dimensions of 50mm×50mm×4mm that meets the strength requirements can be selected. The middle section can be expanded to 50mm×65mm with a wall thickness of not less than 3.5mm to form a variable cross-section section, while the dimensions at both ends can remain unchanged at 50mm×50mm.

[0050] It is easy to understand that using the aforementioned integrally molded variable cross-section reinforcement as the strengthening structure can improve the strength of the skeleton's closed ring. Furthermore, it has no welds, resulting in strong integrity, fewer weak points, and higher reliability. In addition, large-area welding is time-consuming and labor-intensive; the integral molding of the variable cross-section reinforcement in this embodiment makes it easier to manufacture.

[0051] Furthermore, in order to improve the connection strength at the corresponding connection positions at both ends of the top variable cross-section reinforcement 7 and the bottom variable cross-section reinforcement, in some preferred embodiments, such as... Figures 4-6 As shown, the two ends of the top variable cross-section reinforcement 7 are respectively inserted into the top crossbeam 4 and the column 2, or in other words, interlocked. The two ends of the middle variable cross-section reinforcement 6 are respectively inserted into the upper column 201 and the lower column 202. That is, for the top variable cross-section reinforcement 7, its two ends are for interlocking with the top crossbeam 4 and the column 2. For the middle variable cross-section reinforcement 6, its two ends are for interlocking with the upper column 201 and the lower column 202. After interlocking, welding can be performed at the interlocking points to form a stronger connection structure, and the interlocking points facilitate subsequent welding to form uniform fillet welds.

[0052] Specifically, as a preferred embodiment, such as Figure 6As shown, taking the middle variable cross-section reinforcement 6 as an example, the two ends of the middle variable cross-section reinforcement 6 are provided with a narrowing structure. Specifically, during manufacturing, the narrowing process can be used after the variable cross-section section is formed to reduce the size of the two ends. That is to say, the two ends of the middle variable cross-section reinforcement 6 are the male insertion ends for inserting into the upper column 201 and the lower column 202, respectively. Similarly, for the top variable cross-section reinforcement 7, its two ends are also provided with a narrowing structure, so that the two ends of the top variable cross-section reinforcement 7 are the male insertion ends for inserting into the top crossbeam 4 and the column 2, respectively.

[0053] Compared with setting the two ends of the top variable cross-section reinforcement 7 and the middle variable cross-section reinforcement 6 as plug-in male terminals, in the preferred embodiment, it is not necessary to modify the corresponding connection positions of the top crossbeam 4, the upper column 201 and the lower column 202, which facilitates production.

[0054] In addition, such as Figure 4 and Figure 5 As shown, the top variable cross-section reinforcement 7 and the middle variable cross-section reinforcement 6 can also be used to connect the side longitudinal beam 3 and the waist beam 1, so that multiple frame closed rings and the waist beam 1 and the side longitudinal beam 3 form an integral body frame.

[0055] It should be noted that the above-described example provides a case in which variable cross-section reinforcements are used at both the top and middle critical positions. However, in other embodiments, it is not entirely impossible to use variable cross-section reinforcements only at the top critical position or only at the middle critical position. For example, for a long vehicle frame, the whole includes multiple frame closure rings, and some frame closure rings may use variable cross-section reinforcements only at the top critical position or only at the middle critical position.

[0056] Specific embodiments of the variable cross-section reinforcing component for the vehicle body frame provided by this utility model:

[0057] The variable cross-section reinforcement of the vehicle body frame is a one-piece molded structure. Its main body includes a variable cross-section section in the middle, and the outline of the cross-section of the variable cross-section section gradually increases from both ends to the middle. Furthermore, the two ends of the variable cross-section reinforcement are connection ends for connecting with the corresponding structural beams of the vehicle body frame. The corresponding structural beams are, for example, the upper column 201, lower column 202, or top crossbeam 4 described in the above embodiment of the frame closed ring. The connection end can be set in the same way as the plug-in end or plug-in male end described in the above embodiment of the frame closed ring.

[0058] In addition, variable cross-section reinforcements can also be formed using thermal expansion or cold pressing processes.

[0059] Specific embodiments of the vehicle body frame provided by this utility model:

[0060] The overall structure of the vehicle frame is basically the same as that of the vehicle frame in the prior art, including waist beams, side longitudinal beams and multiple longitudinally arranged frame closing rings, etc., of which at least some (or all) of the frame closing rings are the frame closing rings described in the above-mentioned frame closing ring embodiments, which will not be specifically described here.

[0061] Specific embodiments of the vehicle provided by this utility model:

[0062] The vehicle includes a body, which includes a body frame and skins mounted on the body frame. The overall structure of the body frame is basically the same as that of the body frame in the prior art, including waist beams, side longitudinal beams, and multiple longitudinally arranged frame closing rings, etc., of which at least some (or all) of the frame closing rings are the frame closing rings described in the above-mentioned embodiments, which will not be specifically described here.

[0063] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A body frame variable cross-section reinforcement characterized by, The main body is integrally formed, and a variable cross-section section is arranged at the middle of the main body in the extending direction, the profile of the cross section of the variable cross-section section gradually increases from both ends to the middle, and both ends of the main body are connecting ends for connecting with corresponding structural beams of a vehicle body framework.

2. The body frame variable cross-section reinforcement according to claim 1, characterized by, The connecting ends are plug-in ends for plugging with corresponding structural beams.

3. The body frame variable cross-section reinforcement according to claim 2, characterized by, Both ends of the main body are provided with necked structures, so that the plug-in ends constitute plug-in male ends for plugging into corresponding structural beams.

4. A body frame variable cross-section reinforcement according to any one of claims 1 to 3, characterized in that, The main body is integrally formed by thermal expansion and pressure process or cold pressing process.

5. A skeleton closed ring comprising uprights on both sides and a top crossbeam on the top, characterized in that, Both ends of the top cross beam are connected with the two side columns through top variable cross-section stiffeners, the top variable cross-section stiffeners are integrally formed structures, and a variable cross-section section is arranged at the middle of the top variable cross-section stiffeners in the extending direction, the profile of the cross section of the variable cross-section section gradually increases from both ends to the middle; and / or The column includes an upper column and a lower column, the upper column and the lower column are connected through a middle variable cross-section stiffener, the middle variable cross-section stiffener is an integrally formed structure, and a variable cross-section section is arranged at the middle of the middle variable cross-section stiffener in the extending direction, the profile of the cross section of the variable cross-section section gradually increases from both ends to the middle.

6. The cage closing ring of claim 5 wherein, For the case of having a top variable cross-section stiffener, both ends of the top variable cross-section stiffener are plug-in ends for plugging with the top cross beam and the column respectively; for the case of having a middle variable cross-section stiffener, both ends of the middle variable cross-section stiffener are plug-in ends for plugging with the upper column and the lower column respectively.

7. The cage closing ring of claim 6 wherein, For the case of having a top variable cross-section stiffener, both ends of the top variable cross-section stiffener are provided with necked structures, so that the plug-in ends of the top variable cross-section stiffener constitute plug-in male ends for plugging into the top cross beam and the column respectively; for the case of having a middle variable cross-section stiffener, both ends of the middle variable cross-section stiffener are provided with necked structures, so that the plug-in ends of the middle variable cross-section stiffener constitute plug-in male ends for plugging into the upper column and the lower column respectively.

8. The cage closing ring of any one of claims 5-7, wherein, For the case of having a top variable cross-section stiffener, the top variable cross-section stiffener is integrally formed by thermal expansion and pressure process or cold pressing process; for the case of having a middle variable cross-section stiffener, the middle variable cross-section stiffener is integrally formed by thermal expansion and pressure process or cold pressing process.

9. A body frame comprising a waist beam, a side sill, and a plurality of longitudinally arranged frame closed loops, characterized in that, At least part of the framework closed ring is the framework closed ring in any one of claims 5-8.

10. A vehicle comprising a vehicle body, the vehicle body comprising a vehicle body framework, the vehicle body framework comprising a waist rail, a side rail, and a plurality of longitudinally arranged framework closure loops, characterized in that, At least part of the framework closed ring is the framework closed ring in any one of claims 5-8.

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