CN114030334A - Closed connecting structure and manufacturing method thereof, cross beam and vehicle - Google Patents
Closed connecting structure and manufacturing method thereof, cross beam and vehicle Download PDFInfo
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- CN114030334A CN114030334A CN202111365061.4A CN202111365061A CN114030334A CN 114030334 A CN114030334 A CN 114030334A CN 202111365061 A CN202111365061 A CN 202111365061A CN 114030334 A CN114030334 A CN 114030334A
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- connecting structure
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- closed connecting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
- B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
- B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
- B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
- B60G21/051—Trailing arm twist beam axles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/80—Interactive suspensions; arrangement affecting more than one suspension unit
- B60G2204/83—Type of interconnection
- B60G2204/8302—Mechanical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/80—Manufacturing procedures
- B60G2206/81—Shaping
- B60G2206/8102—Shaping by stamping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/80—Manufacturing procedures
- B60G2206/81—Shaping
- B60G2206/811—Shaping by cutting
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The invention provides a closed connecting structure, a manufacturing method of the closed connecting structure, a cross beam and a vehicle. By adopting the structure, when the closed connecting structure is manufactured, the groove digging section without the groove digging can be manufactured through the bulging forming process, and then the groove digging section is cut and formed through the stamping process, so that the small change rate of the section is ensured when the groove digging section is stamped through the bulging forming process; because the groove digging section is provided with a plurality of grooves, the circumference of the cross section of the two ends of the closed connecting structure is larger, and the lateral rigidity and the camber rigidity of the closed connecting structure can be effectively increased; because there is not solid structure in the position of digging a groove, do not occupy the material, compared with both ends have other closed type connection structures of the same cross section girth, the material utilization ratio is higher, the cost is lower.
Description
Technical Field
The invention relates to the technical field of automobile manufacturing, in particular to a closed connecting structure, a manufacturing method of the closed connecting structure, a cross beam and a vehicle.
Background
Compared with an open type connecting structure, namely, the tubular structure with the openings in different forms is also arranged at other positions except the openings at the two ends, the closed type connecting structure has the advantages of lower cost and good light weight effect.
The closed connecting structure in the prior art is usually manufactured by adopting a bulging forming process, the bulging forming process is a stamping processing method for obtaining the geometric shape of a part by utilizing a die to force the thickness of a plate to be reduced and the surface area to be increased, and the closed connecting structure correspondingly produced has the defects of low lateral rigidity and low camber rigidity because the forming method has the process limitation of small cross section change rate when a cylindrical structure is processed.
Therefore, how to provide a closed connection structure with high lateral stiffness and camber stiffness is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide a closed connecting structure with high lateral rigidity and camber rigidity.
In order to solve the technical problem, the invention provides a closed connecting structure which is a cylindrical structure and comprises two groove digging sections positioned at two ends and a closed section between the two groove digging sections, wherein a plurality of grooves are formed in one ends of the two groove digging sections, which are far away from the center.
By adopting the structure, when the closed connecting structure is manufactured, the groove digging section without the groove digging can be manufactured through the bulging forming process, and then the groove digging section is cut and formed through the stamping process, so that the small change rate of the section of the closed connecting structure after stamping in the bulging forming process is ensured; because the groove digging section is provided with a plurality of grooves, the circumference of the cross section of the two ends of the closed connecting structure is larger, and the lateral rigidity and the camber rigidity of the closed connecting structure can be effectively increased; because there is not solid structure in the position of digging a groove, do not occupy the material, compared with both ends have other closed type connection structures of the same cross section girth, the material utilization ratio is higher, the cost is lower.
Optionally, the closed section comprises a thin section located in the middle and transition sections arranged at two ends of the thin section, the circumference of the cross section of the thin section is smaller than that of the cross section of the transition sections, and the circumferences of the cross sections of the two transition sections from the end of the thin section to the end of the excavating groove section smoothly increase.
The invention also provides a manufacturing method of the closed connecting structure, the closed connecting structure is the closed connecting structure described above, the closed section and the trenching section without the trenching are punched and formed by the bulging forming process, a plurality of gaps are axially cut at one end of the two trenching sections far away from the center, and the trenching section with the gaps is punched and formed into a plurality of trenching sections corresponding to the trenching by the punching and pressing process.
The invention also provides a manufacturing method of the closed connecting structure, the closed connecting structure is the closed connecting structure, the closed section is formed by punch forming through a bulging forming process, and then the two grooved sections with the grooves are formed by punch forming through a punching process.
The invention also provides a cross beam which comprises a closed connecting structure and longitudinal arms connected to two ends of the closed connecting structure, wherein the closed connecting structure is the closed connecting structure.
Optionally, a fixing claw is formed between adjacent grooves of the groove digging sections of the closed connecting structure, and the closed connecting structure is overlapped with the trailing arm through a plurality of fixing claws.
Optionally, the grooving section of the closed connecting structure is provided with four grooving grooves and four corresponding fixing claws, and the length of the fixing claw perpendicular to the longitudinal arm arrangement direction is smaller than the length of the fixing claw parallel to the longitudinal arm arrangement direction.
The invention also provides a vehicle comprising a closed connecting structure, namely the closed connecting structure described above.
Drawings
FIG. 1 is a schematic structural view of a closed connecting structure provided in an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of the trough section of FIG. 1;
FIG. 3 is a left side view of FIG. 1;
fig. 4 is a schematic view of the closed type connecting structure of fig. 1 applied to a cross member.
The reference numerals in fig. 1-4 are illustrated as follows:
1 grooving segment, 11 grooving segment, 2 closing segment, 21 thin segment, 22 transition segment and 3 longitudinal arm.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1-3, the enclosed connection structure is a cylindrical structure and includes two slotted sections 1 at two ends and a closed section 2 between the two slotted sections, and a plurality of slots 11 are disposed at ends of the two slotted sections 1 away from the center.
By adopting the structure, when the closed connecting structure is manufactured, the groove digging section 1 without the groove digging 11 can be manufactured through the bulging forming process, and then the groove digging 11 is cut and formed through the stamping process, so that the small change rate of the section of the groove digging section after stamping in the bulging forming process is ensured.
Wherein, the section change rate refers to the change rate of the perimeter of the cross section of the tubular part at different axial positions, and is expressed by xi, and the calculation formula is as follows:
ξ＝(Cmax-Cmin)/Cmin*100％
wherein, CmaxI.e. the maximum value of the perimeter, C, of the cross section of the tubular part at different axial positionsminThe minimum value of the perimeter of the cross section of the tubular part at different axial positions is obtained.
In particular, the closed connection structure applied to the automobile in the prior art is open at the center thereofThe cross-sectional perimeter is usually the smallest, so the cross-sectional perimeter at that location is Cmin(ii) a The cross-sectional perimeter of the end of the steel pipe is usually the largest at the two ends, so that the cross-sectional perimeter of the position is Cmax(ii) a It can be known that the cross-sectional change rate of the closed connection structure in the prior art can be approximated as: the ratio of the perimeter of the cross-section at the tip location to the perimeter of the cross-section at the center location.
Because the bulging forming process has process limitation, the bulging forming process has certain requirements on the cross section change rate of the produced part, and when the cross section change rate of the produced part is larger than the value, the risk of part cracking exists in the production and manufacturing process, so that the quality of the produced part does not meet the standard and cannot be used.
After the structure of the embodiment is adopted, the cross section change rate is also approximate to the ratio of the cross section perimeter at the end position to the cross section perimeter at the central position, but because the embodiment only produces the closed section 2 and the grooved section 1 without the grooves 11 by the bulging forming process, the cross section change rate is smaller than that of the closed connecting structure after the grooves 11 are arranged, namely if the closed connecting structure produced by the embodiment adopts the cross section change rate identical to that of the prior art, after the grooves 11 are arranged, the cross section perimeter at the end position is larger than that of the closed connecting structure in the prior art, and the lateral rigidity and the camber rigidity of the closed connecting structure can be effectively increased.
Moreover, as the solid structure is not arranged at the position of the digging groove 11, the material is not occupied, and compared with other closed connecting structures with the same cross section girth at two ends, the material utilization rate is higher, and the cost is lower.
It can be understood that the specific arrangement form, arrangement position and arrangement number of the grooves 11 can be determined according to the performance requirements of the closed connection structure in practical application, and the length of the groove section 1 can also be changed according to the requirements.
With reference to fig. 1, in the present embodiment, the closing section 2 includes a thin section 21 located in the middle and transition sections 22 disposed at two ends of the thin section 21, the circumference of the cross section of the thin section 21 is smaller than that of the transition sections 22, and the circumferences of the cross sections of the two transition sections 22 from the end of the thin section 21 to the end of the trench digging section 1 increase smoothly.
The circumference of the cross section of the thin section 21 is the minimum value of the circumference of the cross section of the embodiment, so that the lightweight degree of the closed connection structure can be further improved and the overall cost of the closed connection structure can be reduced under the condition of meeting the strength requirement.
In addition, the closed connecting structure provided by the present invention can be applied to various automobile parts or parts of other large equipment, such as cross beams, trailing arms, sub-frame tubular beams, etc. of automobiles, and it is within the scope of the present invention as long as it conforms to the embodiment of the present invention in which the rate of change of the cross section is controlled by providing the cut groove 11. Fig. 4 is a schematic structural diagram of the present embodiment applied to the cross beam, wherein the trailing arms 3 connected to two sides of the cross beam can also adopt the closed connection structure provided by the present invention.
The present invention also provides a method of manufacturing a closed connection structure, for manufacturing a closed connection structure as described above, the method comprising:
the closed section 2 and the grooving sections 1 without the grooving 11 are punched and formed through a bulging forming process, a plurality of gaps are axially cut at one ends of the two grooving sections 1 far away from the center, the two grooving sections 1 are radially and outwardly propped open through a punching process, the plurality of gaps are correspondingly formed into a plurality of grooving 11, and finally the grooving section 1 with the grooving 11 is obtained.
The closed connecting structure manufactured by the bulging forming process is better in precision and stability and lower in cost, but the problem of cracking of parts caused by the influence of the change rate of the cross section is easily solved.
In addition to the above method, the closed type connection structure of the present embodiment can be manufactured by:
the closed section 2 is formed by a bulging forming process, and then the two groove sections 1 provided with the grooves 11 are directly formed by punching by a punching process.
The method can achieve the same technical effects as the method, and therefore, the method is not described in detail herein.
It should be understood that the bulging forming process may be a bulging hydraulic forming process or a bulging air pressure forming process, and the stamping process may be any one of the existing mature processes, which are not limited in the present invention as long as the above technical effects can be achieved correspondingly.
The embodiment of the present invention further provides a cross beam, including a closed connection structure and trailing arms 3 connected to two ends of the closed connection structure, where the closed connection structure is the above-described closed connection structure, and the closed connection structure has the above technical effects, so the cross beam including the closed connection structure should also have the same technical effects, and therefore, the details are not described herein again.
Referring to fig. 4, a fixing claw is formed between adjacent grooves 11 of the grooved sections 1 of the closed connecting structure, and the closed connecting structure overlaps the trailing arm 3 by a plurality of fixing claws. Specifically, the grooving section 1 of the closed connection structure is provided with four grooving 11 and four corresponding fixing claws, and the length of the fixing claw perpendicular to the arrangement direction of the trailing arm 3 is smaller than the length of the fixing claw parallel to the arrangement direction of the trailing arm 3.
So set up, closed connection structure can be better be connected with pipy trailing arm 3, and the trailing arm 3 is pressed from both sides tightly to the central point along the radial direction that trailing arm 3 can be followed to the stationary dog that its length is longer, and the stationary dog that the length is shorter then can direct butt trailing arm 3's lateral wall, and it is more convenient wholly to fix.
The same as the closed connecting structure described above, the number of the grooves 11 and the number of the fixing claws may be set according to the actual situation when applied to the closed connecting structure of the cross beam, and the present invention is not limited to this, as long as both ends of the closed connecting structure can be connected to the trailing arm 3.
An embodiment of the present invention further provides a vehicle, including a closed connection structure, where the closed connection structure is the above-described closed connection structure, and since the closed connection structure already has the above technical effects, the vehicle including the closed connection structure should also have the same technical effects, and therefore details are not described herein again.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (8)
1. A kind of closed connecting structure, characterized by: the closed connecting structure is of a cylindrical structure and comprises groove digging sections (1) located at two ends and a closed section (2) between the groove digging sections, and a plurality of grooves (11) are formed in one ends, far away from the center, of the two groove digging sections (1).
2. The closed connecting structure according to claim 1, wherein: the closed section (2) comprises a thin section (21) located in the middle and transition sections (22) arranged at two ends of the thin section (21), the circumference of the cross section of the thin section (21) is smaller than that of the cross section of the transition sections (22), and the circumferences of the cross sections of the two transition sections (22) from the end of the thin section (21) to the end of the grooving section (1) are increased smoothly.
3. A method of manufacturing a closed connecting structure according to any one of claims 1 to 2, characterized in that: the method comprises the steps that a closed section (2) and a grooving section (1) which is not provided with a grooving (11) are subjected to punch forming through a bulging forming process, a plurality of gaps are axially cut at one end, away from the center, of the grooving section (1), and the grooving section (1) with the gaps is subjected to punch forming through a punch forming process to form the grooving section (1) with the corresponding grooving (11).
4. A method of manufacturing a closed connecting structure according to any one of claims 1 to 2, characterized in that: the closed section (2) is formed by punching through a bulging forming process, and the two groove digging sections (1) provided with the groove digging (11) are formed by punching through a punching process.
5. A cross-beam, characterized in that: comprising a closed connecting structure and trailing arms (3) connected to both ends thereof, the closed connecting structure being as defined in any one of claims 1-2.
6. The beam according to claim 5, wherein: and a fixed claw is formed between adjacent grooves (11) of the groove digging sections (1) of the closed connecting structure, and the closed connecting structure is in lap joint with the trailing arm (3) through a plurality of fixed claws.
7. The beam according to claim 6, wherein: the digging groove section (1) of the closed connecting structure is provided with four digging grooves (11) and four corresponding fixing claws, and the length of the fixing claws perpendicular to the arrangement direction of the longitudinal arm (3) is smaller than the length of the fixing claws parallel to the arrangement direction of the longitudinal arm (3).
8. A vehicle, characterized in that: comprising a closed connection structure according to any one of claims 1-2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111365061.4A CN114030334A (en) | 2021-11-17 | 2021-11-17 | Closed connecting structure and manufacturing method thereof, cross beam and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111365061.4A CN114030334A (en) | 2021-11-17 | 2021-11-17 | Closed connecting structure and manufacturing method thereof, cross beam and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN114030334A true CN114030334A (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111365061.4A Pending CN114030334A (en) | 2021-11-17 | 2021-11-17 | Closed connecting structure and manufacturing method thereof, cross beam and vehicle |
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| CN (1) | CN114030334A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1925994A (en) * | 2003-10-29 | 2007-03-07 | 汽车底盘国际Snc公司 | Flexible axle having a transverse stiffness which is increased with the aid of at least one spring-cup-forming part, spring cup and corresponding vehicle |
| CN107310342A (en) * | 2016-04-26 | 2017-11-03 | 宝山钢铁股份有限公司 | Variable cross-section line hydraulic expanding tube torsion beam |
| CN113352836A (en) * | 2020-03-05 | 2021-09-07 | 株式会社 F.泰克 | Torsion beam type suspension |
-
2021
- 2021-11-17 CN CN202111365061.4A patent/CN114030334A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1925994A (en) * | 2003-10-29 | 2007-03-07 | 汽车底盘国际Snc公司 | Flexible axle having a transverse stiffness which is increased with the aid of at least one spring-cup-forming part, spring cup and corresponding vehicle |
| CN107310342A (en) * | 2016-04-26 | 2017-11-03 | 宝山钢铁股份有限公司 | Variable cross-section line hydraulic expanding tube torsion beam |
| CN113352836A (en) * | 2020-03-05 | 2021-09-07 | 株式会社 F.泰克 | Torsion beam type suspension |
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