A vehicle frame structure improving generalization rate
By introducing the design of circular tube beams and convex boxes into the frame structure, the problem of increased production costs caused by changes in wheelbase for different vehicle models was solved, and the universality and stability of the frame structure were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING CHANGAN KUAYUE AUTOMOBILE
- Filing Date
- 2025-06-27
- Publication Date
- 2026-07-21
AI Technical Summary
Variations in wheel track for different vehicle models necessitate the creation of new molds for longitudinal beams, cross beams, and other components, increasing production costs and impacting overall economic efficiency.
Design a frame structure in which a circular tube beam connects the longitudinal beams. The end of the circular tube beam protrudes and the leaf spring mounting point is adjustable through a convex box and a lug. Combined with Z-shaped plates and reinforcing sections, the structure's stability and versatility are improved.
It adapts to different wheelbases without changing the frame structure, reduces development costs, increases the versatility of longitudinal beams, enhances structural stability and connection strength, and avoids frequent replacement of welding fixtures.
Smart Images
Figure CN224528771U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automobile frames, specifically to a frame structure that improves the rate of standardization. Background Technology
[0002] In modern automobile manufacturing, the chassis, as an important component of the vehicle structure, includes crossbeams and longitudinal beams. The longitudinal beams are arranged in the shape of C-shaped channel steel, including vertically arranged web plates and flanges vertically fixed to both sides of the web plates. Square grooves are formed between the flanges on both sides and the web plates. The leaf spring is the core elastic element of the suspension system. Its structure is usually composed of several alloy spring steel plates of unequal length, forming a spring beam with approximately equal strength. The connection structure of the leaf spring usually includes the connection between the hanger and the chassis, and the connection between the pin and the hanger. This design allows the spring to adapt to changes in the distance between the axle and the chassis during vehicle operation, achieving good extension and contraction performance.
[0003] However, since different models have different wheelbase standards, the change in wheelbase leads to changes in the spacing between the leaf spring mounting points of the longitudinal beams on both sides. This will force the longitudinal beams, cross beams and other components to be re-molded. The cost of a single model's longitudinal beam mold can be as high as 200,000 to 500,000 yuan. If multiple platforms are developed, the cost will increase significantly, affecting the overall economic benefits. Therefore, the change in vehicle wheelbase leads to a surge in production costs. In response to this problem, the following improvements are proposed. Utility Model Content
[0004] The present invention aims to provide a chassis structure that improves the degree of standardization, so as to solve the problem of increased production costs caused by customized chassis design for different wheelbase models.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a frame structure for improving the generalization rate, comprising longitudinal beams on both sides, a crossbeam fixed between the longitudinal beams, and a circular tube beam connected to the longitudinal beams on both sides of the rear axle. The end of the circular tube beam protrudes from the longitudinal beam, and the end of the circular tube beam is connected to a lug for installing a leaf spring. A convex box is connected between the lug and the longitudinal beam.
[0006] The beneficial effects of this solution are as follows: the circular tube beam protrudes from the longitudinal beams on both sides, meaning that the length of the circular tube beam is longer than the distance between the longitudinal beams on both sides. Within a certain length range, when the wheel spacing changes, by setting convex boxes of different sizes between the web of the longitudinal beam and the hanger, different wheel spacings can be installed without redeveloping the frame structure, thereby saving costs.
[0007] Furthermore, the leaf spring mounting point can be changed only by setting the convex box, while other parts on the frame remain unchanged. Therefore, the longitudinal beam universality is increased, and the length of the round tube beam extending beyond both sides of the longitudinal beam can cover 3-5 different wheelbase models. This reduces development costs and allows different wheelbases to use the same longitudinal beam structure without the need for frequent switching of welding fixtures.
[0008] Preferably, as an improvement, the convex box is arranged in the shape of a C-shaped channel steel. The convex box includes a web and wing plates perpendicular to both sides of the web. Folded edge plates are arranged perpendicularly to each other on the side of the wing plates away from the web. The folded edge plates are used to connect with the web of the longitudinal beam.
[0009] The beneficial effects are as follows: the C-shaped channel of the convex box is designed in the form of steel. After the convex box is fixedly connected to the web of the longitudinal beam, the square channel of the convex box fits into the web of the longitudinal beam, achieving structural lightweighting without reducing the structural connection strength.
[0010] Preferably, as an improvement, the lifting lug is fixed to the end of the circular tube beam, and the lifting lug is connected to the web of the convex box. Both the lifting lug and the web of the convex box are provided with connection ports for the circular tube beam to pass through.
[0011] Preferably, as an improvement, a connecting plate is vertically arranged on the side of the lifting lug near the convex box, and a Z-shaped plate is fixedly connected between the connecting plate and the web of the convex box. The Z-shaped plate includes a fixed plate arranged parallel on both sides and an inclined plate connected between the two fixed plates.
[0012] The beneficial effects are as follows: The fixing plates on both sides of the Z-shaped plate are fixedly connected to the web plate and connecting plate of the convex box, respectively, thereby fixing the lug and the convex box. During vehicle operation, due to the working characteristics of the leaf spring itself, the vibration is relatively large. The lug and the convex box are fixedly connected to the circular tube beam through the connecting port. By setting the Z-shaped plate, the connection surface between the two can be increased, preventing the occurrence of stress concentration. In addition, after the structural stability is improved, the modal frequency of the leaf spring lug connection structure is increased, thereby avoiding resonance between the lug connection structure and the leaf spring and enhancing the structural stability.
[0013] Furthermore, when a vehicle requires non-standard adjustments under certain special environments and needs, the width between the two fixed plates of the Z-shaped plate can be changed by altering the angle between the inclined plate of the Z-shaped plate and the two fixed plates on both sides. This allows the plate to be reconnected between the lug and the convex box, achieving non-standard adjustment of the wheel track, saving development costs, and improving adjustment efficiency.
[0014] Preferably, as an improvement, the web of the longitudinal beam has several installation openings for the transverse beam to pass through, and the shape and size of the installation openings are the same as the shape and size of the cross section of the transverse beam.
[0015] Preferably, as an improvement, a number of reinforcing boxes are provided in the longitudinal beam square groove, and the reinforcing boxes have first reinforcing openings for the crossbeams and circular tube beams to pass through. The shape and size of the first reinforcing openings of the reinforcing boxes are the same as the cross-sectional shape and size of the corresponding crossbeams or circular tube beams.
[0016] Preferably, as an improvement, a reinforcing section is also provided in the square groove at the front end of the longitudinal beam, and the reinforcing section is connected to a bracket for mounting the engine.
[0017] The beneficial effects are as follows: by setting up a reinforcing section, the connection front of the engine passive end can be improved, stress concentration at the engine passive end, i.e., the support connection structure, can be avoided, and the modal frequency of the support connection structure can be increased, preventing the engine passive end from resonating with engine vibration excitation and enhancing structural stability.
[0018] Preferably, as an improvement, the reinforcing section has at least two second reinforcing openings through which the crossbeam passes, and the shape and size of the second reinforcing openings are the same as the shape and size of the crossbeam cross section.
[0019] The beneficial effects are as follows: the two crossbeams running through the reinforcing section are adjacent, the adjacent crossbeams limit the length of the reinforcing section, and the time is fixed near the passive end of the vehicle engine. In addition, it also improves the stability of the connection structure of the passive end of the engine.
[0020] Preferably, as an improvement, the reinforced section has several gaps. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the overall structure of the vehicle frame according to an embodiment of the present utility model; Figure 2 This is a top view of the overall frame structure of an embodiment of this utility model; Figure 3 This is a schematic diagram of the reinforcing section structure in an embodiment of the present utility model; Figure 4 for Figure 2 A partial cross-sectional structural diagram of the connection between the AA-direction support and the longitudinal beam; Figure 5 for Figure 2 A partial cross-sectional structural diagram of the connection between the crossbeam and the reinforcing section in the BB direction; Figure 6 for Figure 2 A partial cross-sectional structural diagram of the connection between the crossbeam and longitudinal beam in the CC direction; Figure 7 for Figure 2 A partial cross-sectional schematic diagram of the DD-direction leaf spring connection structure; Figure 8 This is an exploded view of the leaf spring connection structure according to an embodiment of the present invention. Detailed Implementation
[0022] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: longitudinal beam 1, mounting port 11, reinforcing box 12, first reinforcing port 121, reinforcing section 13, bracket 131, second reinforcing port 132, notch 133, crossbeam 2, round tube beam 3, lifting lug 31, connecting plate 311, convex box 32, folded edge plate 321, connecting port 33, Z-shaped plate 34, fixing plate 341, and inclined plate 342.
[0023] Example The basic implementation examples are as follows: Figures 1-8 As shown, Figures 1-3 , Figure 6 The illustrated frame structure for improving versatility includes two longitudinal beams 1 on both sides. The webs of the longitudinal beams 1 are vertically arranged, and the square grooves of the two longitudinal beams 1 are opposite each other. Several crossbeams 2 are connected between the longitudinal beams 1, and the crossbeams 2 are perpendicular to the longitudinal beams 1. Circular tubular beams 3 are also vertically connected to the longitudinal beams 1 on both sides of the rear axle of the vehicle. Both the circular tubular beams 3 and the crossbeams 2 are tubular. The length of the circular tubular beams 3 is greater than the length of the crossbeams 2 and protrudes beyond the webs of the two longitudinal beams 1. Several reinforcing boxes 12 are fixedly connected within the square grooves of the longitudinal beams 1. The reinforcing boxes 12 are also C-shaped channel steel, and their webs are also vertically arranged. The square grooves of the reinforcing boxes 12 are directly opposite the square grooves of the longitudinal beams 1. The upper and lower flanges of the reinforcing boxes 12 and the longitudinal beams 1 are respectively... Each of the reinforcing boxes 12 and the upper and lower flanges of the longitudinal beam 1 are provided with corresponding connecting holes. The reinforcing box 12 is fixedly connected to the upper and lower flanges of the longitudinal beam 1 by pins at the connecting holes, thereby fixing the reinforcing box 12 in the square groove of the longitudinal beam 1. There are several reinforcing boxes 12, which correspond one-to-one with the cross beam 2 and the circular tube beam 3. The web of each of the reinforcing boxes 12 is provided with a first reinforcing opening 121 for the cross beam 2 or the circular tube beam 3 to pass through. The cross beam 2 and the circular tube beam 3 have the same cross-sectional diameter. The first reinforcing opening 121 is circular and its diameter is the same as the cross-sectional diameter of the cross beam 2 and the circular tube beam 3. The two ends of the cross beam 2 and the circular tube beam 3 pass through the first reinforcing opening 121 and the mounting opening 11 in sequence, and are welded to the reinforcing box 12 and the longitudinal beam 1 through the first reinforcing opening 121 and the mounting opening 11, respectively.
[0024] like Figures 7-8 As shown, the circular tube beam 3 protrudes from the web of the longitudinal beam 1 at both ends. The ends of the circular tube beam 3 are connected to a convex box 32 and a lifting lug 31 for mounting a leaf spring. The convex box 32 is also C-shaped channel steel. The web of the convex box 32 is vertically arranged. At the ends of the convex box 32, opposite to its web, are folded edge plates 321. The folded edge plates 321 of the convex box 32 are connected to the web of the longitudinal beam 1 by bolts. Both the lifting lug 31 and the convex box 32 have connection ports 33 for the circular tube beam 3 to pass through. The connection ports 33 are also circular, and their diameter is the same as the cross-sectional diameter of the circular tube beam 3. The ends of the circular tube beam 3 pass through the convex box in sequence. Box 32 and lifting lug 31, and the round tube beam 3 are welded to the lifting lug 31 and the convex box 32 respectively through the connecting port 33. A connecting plate 311 is vertically arranged on the side of the lifting lug 31 near the convex box 32. A Z-shaped plate 34 is connected between the connecting plate 311 and the web of the convex box 32. The Z-shaped plate 34 includes a fixing plate 341 vertically arranged on both sides and an inclined plate 342 connected between the fixing plates 341 on both sides. The Z-shaped plate 34 is integrally formed. During connection, the fixing plates 341 on both sides are welded to the web of the convex box 32 and the connecting plate 311 of the lifting lug 31 respectively, thereby improving the stability of the leaf spring connection structure.
[0025] like Figures 4-5 As shown, a reinforcing section 13 is provided in the square groove at the front end of the longitudinal beam 1. The cross-sectional shape of the reinforcing section 13 is also C-shaped channel steel. The web of the reinforcing section 13 is vertically arranged, and the square groove of the reinforcing section 13 is directly opposite to the square groove of the longitudinal beam 1. The upper and lower flanges of the reinforcing section 13 and the longitudinal beam 1 are respectively provided with corresponding connecting holes, and are fixedly connected by pins at the connecting holes. The two ends of the reinforcing section 13 are provided with second reinforcing openings 132 for the crossbeam 2 to pass through. The second reinforcing openings 132 are circular and the diameter is the same as the cross-sectional diameter of the crossbeam 2. The crossbeam 2 passes through the web of the reinforcing section 13 and the longitudinal beam 1 in sequence. The crossbeam 2 is connected to the reinforcing section 13 and the longitudinal beam 1 through the second reinforcing openings 132 and the mounting openings 11, respectively. The beam 1 is welded, and a bracket 131 for mounting the engine is welded to the web of the reinforcing section 13. A reinforcing plate for connecting with the lower flange of the longitudinal beam 1 is welded to the bottom of the bracket 131. The reinforcing plate is fixedly connected to the lower flange of the longitudinal beam 1 by bolts. The bracket 131 is fixedly connected to the longitudinal beam 1 through the reinforcing section 13, and the bracket 131 is supported below the reinforcing plate, thereby increasing the contact area between the bracket and the longitudinal beam 1 and improving the modal frequency of the passive end of the engine. When the engine vibrates, it will not excite the resonance of the bracket 131 connection structure, thus ensuring the stability of the structure. Several notches 133 are opened on the web of the reinforcing section 13 between the second reinforcing openings 132, which improves the lightweight design of the structure while satisfying the structural stability.
[0026] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A frame structure for improving versatility, characterized in that: It includes longitudinal beams on both sides, crossbeams fixed between the longitudinal beams, and circular tube beams connected to the longitudinal beams on both sides of the rear axle. The ends of the circular tube beams protrude from the longitudinal beams, and the ends of the circular tube beams are connected to lugs for installing leaf springs. A convex box is connected between the lugs and the longitudinal beams.
2. The frame structure according to claim 1, characterized in that: The convex box is set in the shape of a C-shaped channel steel. The convex box includes a web and flanges perpendicular to both sides of the web. Folded edge plates are set perpendicularly to each other on the side of the flanges away from the web. The folded edge plates are used to connect with the web of the longitudinal beam.
3. The frame structure according to claim 2, characterized in that: The lifting lug is fixed to the end of the circular tube beam and is connected to the web of the convex box. Both the lifting lug and the web of the convex box have connection ports for the circular tube beam to pass through.
4. The frame structure according to claim 3, characterized in that: A connecting plate is vertically installed on the side of the lifting lug near the convex box. A Z-shaped plate is fixedly connected between the connecting plate and the web of the convex box. The Z-shaped plate includes a fixed plate arranged parallel on both sides and an inclined plate connecting the two fixed plates.
5. The frame structure according to claim 1, characterized in that: The web of the longitudinal beam has several installation openings for the transverse beam to pass through, and the shape and size of the installation openings are the same as the shape and size of the cross section of the transverse beam.
6. The frame structure according to claim 1, characterized in that: Several reinforcing boxes are installed in the longitudinal beam square groove. Each reinforcing box has a first reinforcing opening for the crossbeam and the circular tube beam to pass through. The shape and size of the first reinforcing opening of each reinforcing box are the same as the cross-sectional shape and size of the corresponding crossbeam or circular tube beam.
7. The frame structure according to claim 1, characterized in that: A reinforcing section is also provided in the square groove at the front end of the longitudinal beam, and the reinforcing section is connected to a bracket for mounting the engine.
8. The frame structure according to claim 7, characterized in that: The reinforcing section has at least two second reinforcing openings through which the crossbeam passes, and the shape and size of the second reinforcing openings are the same as the shape and size of the crossbeam cross section.
9. The frame structure according to claim 7, characterized in that: The reinforced section has several gaps.