CN107472363B - Semitrailer girder - Google Patents
Semitrailer girder Download PDFInfo
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- CN107472363B CN107472363B CN201710760657.1A CN201710760657A CN107472363B CN 107472363 B CN107472363 B CN 107472363B CN 201710760657 A CN201710760657 A CN 201710760657A CN 107472363 B CN107472363 B CN 107472363B
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- girder
- folding section
- folding
- tail
- connecting part
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/18—Understructures, i.e. chassis frame on which a vehicle body may be mounted characterised by the vehicle type and not provided for in groups B62D21/02 - B62D21/17
- B62D21/20—Understructures, i.e. chassis frame on which a vehicle body may be mounted characterised by the vehicle type and not provided for in groups B62D21/02 - B62D21/17 trailer type, i.e. a frame specifically constructed for use in a non-powered vehicle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
- Auxiliary Methods And Devices For Loading And Unloading (AREA)
Abstract
The invention discloses a semitrailer girder, which comprises two wing plates arranged in parallel up and down and a web plate arranged between the two wing plates, wherein the thickness of the web plate is 3.5mm, and the web plates are sequentially divided along the longitudinal direction of the girderThe web plate is provided with mounting holes for mounting the cross beams at equal intervals; a folded part with a longitudinal length L 2 From length L 1 Comprises a first folding section connected with the first connecting part, a tail folding section connected with the tail connecting part and a middle folding section connected with the first folding section and the tail folding section, wherein L 2 /L 1 = 0.9526; the middle folding section is formed by connecting a plurality of bending units end to form a folding line structure, two adjacent bending units form a V shape, an included angle between the two adjacent bending units is an obtuse angle, and the middle folding section is arranged in a mirror image staggered mode along the end-to-end connecting line of the folding part. The girder reduces the girder self weight on the premise of ensuring the girder strength, improves the cargo weight, and simultaneously improves the left-right torsion resistance of the girder.
Description
Technical Field
The invention relates to the technical field of vehicle manufacturing, in particular to a semitrailer girder.
Background
At present, the semitrailer occupies a main position in the transportation industry in China, and the performance of the semitrailer girder is related to the performance of the semitrailer. Due to standardization of the transportation industry, the standard load of the highway in China is carried out by 55 tons, namely the sum of the total mass of the traction head of the main vehicle and the semitrailer is less than or equal to 55 tons, wherein the maximum load mass of the semitrailer is not more than 35 tons. Therefore, the dead weight of the vehicle is reduced only on the premise of ensuring the performance of the vehicle when more cargoes are required to be loaded.
Traditional semitrailer girder includes girder part including the web all for planar structure, and some producer carries out the round hole punching press to girder web for the weight that lightens the girder, consequently, although alleviateed big Liang Chongliang, but unable assurance girder's bearing strength has reduced girder's life, and then also causes serious potential safety hazard. If the web thickness is simply reduced to reduce the weight, the strength is reduced, and the quality of the girder and even the whole semitrailer is also affected.
Moreover, conventional girder construction typically only emphasizes its load carrying capacity, and is generally an I-shaped or semi-I-shaped construction. However, when the semitrailer has a large load, particularly when the vehicle is driven on a turn or uneven road surface, the girder receives the side force and the action of twisting and bending force, so that the girder has cracks or breaks at various weak points, the service life of the girder is reduced, and even very serious safety consequences can be caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing a semitrailer girder which reduces the self weight of the girder, improves the cargo weight and simultaneously improves the left-right torsion resistance of the girder on the premise of ensuring the strength of the girder.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a semitrailer girder, its transversal "worker" font that personally submits, includes two pterygoid lamina of upper and lower parallel arrangement and locates the web between two pterygoid lamina, its characterized in that: the web plate has the thickness of 3.5mm and is longitudinally and sequentially divided into a head connecting part, a folding part and a tail connecting part, and mounting holes for mounting the cross beams are formed in the web plate at equal intervals; a folded part with a longitudinal length L 2 From length L 1 Comprises a first folding section connected with the first connecting part, a tail folding section connected with the tail connecting part and a middle folding section connected with the first folding section and the tail folding section, wherein the L 2 /L 1 = 0.9526; the middle folding section is formed by connecting a plurality of bending units end to form a folding line structure, two adjacent bending units form a V shape, an included angle between the two adjacent bending units is an obtuse angle, and the middle folding section is arranged in a mirror image staggered mode along the end-to-end connecting line of the folding part.
The further technical proposal is that: the longitudinal length ratio of the head connecting part, the folding part and the tail connecting part is 11-12:19-20:1.
The further technical proposal is that: the longitudinal length of the middle folding section is L 4 From length L 3 Is formed by bending a steel plate, the L 3 /L 1 ＝0.967，L 4 /L 3 ＝0.952。
The further technical proposal is that: the included angle between the two bending units is 144 degrees, and the length of each bending unit is 200mm.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in:
1) The material thickness of the web plate is reduced, and the material length of the web plate is increased by designing a section of planar structure of the web plate into a fold line structure, so that the self weight of the girder is reduced by integral combination, and the cargo weight of the semitrailer is improved;
2) The web plate is contacted with the upper wing plate and the lower wing plate from the previous straight line section contact to the multi-line section contact, so that the stress is dispersed, the whole web plate is widened, and the supporting strength of the web plate on the upper wing plate and the lower wing plate is improved;
3) The mounting holes for mounting the cross beams on the web plate folding parts are formed in the inclined bending units, so that the contact area between the cross beams and the web plates at the positions after the cross beams are mounted is large, and the connection strength of the part connection positions is improved;
4) The double-point supporting structure of the web plate enhances the torque force of the girder, improves the left-right torsion resistance, effectively avoids the crack or fracture of each weak point of the girder, prolongs the service life of the girder, and ensures the personal safety and property safety of drivers.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic left-hand view of the present invention;
FIG. 2 is a schematic diagram of the front view of the present invention;
fig. 3 is a schematic diagram of the structure of A-A in fig. 2.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1-3, a semi-trailerThe cross section of the girder is I-shaped and comprises two wing plates 20 which are arranged in parallel up and down and a web plate 10 arranged between the two wing plates 20; the web 10 has a thickness of 3.5mm and is divided into a head connecting part 1, a folding part 2 and a tail connecting part 3 in sequence along the longitudinal direction of the girder, and mounting holes 4 for mounting the cross beams are arranged on the web 10 at equal intervals; a folded part 2 with a longitudinal length L 2 From length L 1 Comprises a first folding section 21 connected with the first connecting part 1, a tail folding section 23 connected with the tail connecting part 3 and a middle folding section 22 connected with the first folding section 21 and the tail folding section 23, wherein L is a metal plate 2 /L 1 = 0.9526; the middle folding section 22 is formed by connecting a plurality of bending units end to form a folding line structure, two adjacent bending units form a V shape, an included angle between the two adjacent bending units is an obtuse angle, and the middle folding section 22 is arranged in a mirror image staggered mode along the end-to-end connecting line of the folding part 2.
Wherein, the longitudinal length ratio of the head connecting part 1, the folding part 2 and the tail connecting part 3 is 11-12:19-20:1. Taking the total length of the girder as 12984mm for example, the longitudinal lengths of the head connection part 1, the folding part 2 and the tail connection part 3 are 4697mm, 7882mm and 405mm respectively, namely L 2 =7882 mm, according to L 2 /L 1 = 0.9526, then L 1 The girder web material length was increased by at least 392mm compared to conventional, based on the volume of the web 10 (web height 432 mm) and the material density (steel sheet ρ=7.85 g/cm) 3 ) The maximum weight of the girder is reduced by 61.4kg compared with the conventional web plate with the thickness of 5mm, and the weight of the semitrailer is reduced by 122.8kg by two girders.
The maximum stress and maximum deformation of the girder under overload conditions of 10t and 15t at a thickness of 5mm, calculated as the total length of the girder of 12984mm, are shown in the following table.
The bending shape is the same when the thickness of the girder is 3.5mm based on the total length of the girder of 12984mm, and only when L is 2 /L 1 Take different values. When L 2 /L 1 When=1, i.e. the web 10 is reduced in thickness by 3.5mm, the structure is not changed (planar structure), inUnder the condition, the girder has much lower strength than the conventional girder, and is extremely easy to damage; when L 2 /L 1 >0.9526, the web 10 has a folded configuration, but due to the material length L of the fold 2 1 Shorter, resulting in less bending, the girder still has a lower strength than conventional girders. When L 2 /L 1 <0.9526 the web 10 has a folded configuration and the material length L of the folded portion 2 1 Longer, results in greater bending but less differential impact on the strength of the girder and less significant weight loss.
In summary, the invention reduces the material thickness of the web 10, and increases the material length of a section of the web 10 by designing the section of the web 10 into a fold line structure, but reduces the self weight of the girder by the integral combination, thereby improving the cargo weight of the semitrailer, when L 2 /L 1 When the weight of the girder is equal to or smaller than 0.9526, the weight of the girder can be reduced maximally on the premise of meeting the use strength of the girder; the web 10 is contacted with the upper wing plate and the lower wing plate from the previous straight line section contact to the multi-line section contact, so that the stress is dispersed, the whole web is widened, and the supporting strength of the web on the upper wing plate and the lower wing plate is improved; the mounting holes 4 for mounting the cross beam on the web plate folding part 2 are arranged on the inclined bending unit, so that the contact area between the cross beam and the web plate at the position after the cross beam is mounted is large, and the connection strength of the part connection position is improved; the double-point supporting structure of the web plate enhances the torque force of the girder, improves the left-right torsion resistance, effectively avoids the crack or fracture of each weak point of the girder, prolongs the service life of the girder, and ensures the personal safety and property safety of drivers.
Further, the middle folded section 22 has a longitudinal length L 4 From length L 3 Is formed by bending a steel plate, the L 3 /L 1 ＝0.967，L 4 /L 3 ＝0.952。
Taking L according to the total length of the girder of 12984mm 2 /L 1 ＝0.9526，L 3 /L 1 =0.967, the folded portion 2 is formed by a length of 8274mm (L 1 ) Is formed by bending a steel plate, the middle bending section 22 is formed by bending a steel plate with a length of 8000mm (L 3 ) Is bent to form a steel sheet with a longitudinal length of 7616mm (L 4 ) Is a broken line structure. The greater the length of the middle-folded section 22, the smaller the lengths of the first connecting section 21 and the tail connecting section 23, the part for supporting strength and resisting left-right distortion is the middle-folded section 22, and the first connecting section 21 and the tail connecting section 23 only play a role of coaxially connecting the middle-folded section 22 with the first connecting part 1 and the tail connecting part 3, so that the middle-folded section 22 is in mirror image staggered arrangement along the head-tail connecting line of the folding part 2. The longer the length of the intermediate fold 22 in the fold 2, the longer the service life of the girder.
And the included angle between two bending units is 144 degrees, the length of each bending unit is 200mm, and the girder has strong strength and left and right bending resistance.
The foregoing is only a preferred embodiment of the present invention, and any and all simple modifications, variations and equivalents of the present invention will fall within the scope of the present invention.
Claims (4)
1. The utility model provides a semitrailer girder, its transversal "worker" font that personally submits, includes two pterygoid lamina of upper and lower parallel arrangement and locates the web between two pterygoid lamina, its characterized in that:
the web plate has the thickness of 3.5mm and is longitudinally and sequentially divided into a head connecting part, a folding part and a tail connecting part, and mounting holes for mounting the cross beams are formed in the web plate at equal intervals;
a folded part with a longitudinal length L 2 From length L 1 Comprises a first folding section connected with the first connecting part, a tail folding section connected with the tail connecting part and a middle folding section connected with the first folding section and the tail folding section, wherein the L 2 /L 1 ＝0.9526；
The middle folding section is formed by connecting a plurality of bending units end to form a folding line structure, two adjacent bending units form a V shape, an included angle between the two adjacent bending units is an obtuse angle, and the middle folding section is arranged in a mirror image staggered mode along the end-to-end connecting line of the folding part.
2. A semitrailer girder as claimed in claim 1, wherein: the longitudinal length ratio of the head connecting part, the folding part and the tail connecting part is 11-12:19-20:1.
3. A semitrailer girder as claimed in claim 1, wherein: the longitudinal length of the middle folding section is L 4 From length L 3 Is formed by bending a steel plate, the L 3 /L 1 ＝0.967，L 4 /L 3 ＝0.952。
4. A semitrailer girder as claimed in claim 1, wherein: the included angle between the two bending units is 144 degrees, and the length of each bending unit is 200mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710760657.1A CN107472363B (en) | 2017-08-30 | 2017-08-30 | Semitrailer girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710760657.1A CN107472363B (en) | 2017-08-30 | 2017-08-30 | Semitrailer girder |
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| Publication Number | Publication Date |
|---|---|
| CN107472363A CN107472363A (en) | 2017-12-15 |
| CN107472363B true CN107472363B (en) | 2023-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710760657.1A Active CN107472363B (en) | 2017-08-30 | 2017-08-30 | Semitrailer girder |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0677425A1 (en) * | 1994-04-15 | 1995-10-18 | Lohr Industrie | Frame constructed of pressed and welded steel sheet, for holding a container with converging sides |
| CN204264274U (en) * | 2014-12-11 | 2015-04-15 | 山东三星机械制造有限公司 | A kind of tank car crossbeam |
| CN204341195U (en) * | 2014-12-27 | 2015-05-20 | 山西大运汽车制造有限公司 | A kind of superimposed trailer girder section structure |
| CN207106630U (en) * | 2017-08-30 | 2018-03-16 | 河北驹王专用汽车股份有限公司 | A kind of semitrailer crossbeam |
-
2017
- 2017-08-30 CN CN201710760657.1A patent/CN107472363B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0677425A1 (en) * | 1994-04-15 | 1995-10-18 | Lohr Industrie | Frame constructed of pressed and welded steel sheet, for holding a container with converging sides |
| CN204264274U (en) * | 2014-12-11 | 2015-04-15 | 山东三星机械制造有限公司 | A kind of tank car crossbeam |
| CN204341195U (en) * | 2014-12-27 | 2015-05-20 | 山西大运汽车制造有限公司 | A kind of superimposed trailer girder section structure |
| CN207106630U (en) * | 2017-08-30 | 2018-03-16 | 河北驹王专用汽车股份有限公司 | A kind of semitrailer crossbeam |
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|---|---|
| CN107472363A (en) | 2017-12-15 |
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Denomination of invention: A semi trailer beam Effective date of registration: 20230822 Granted publication date: 20230606 Pledgee: China Postal Savings Bank Co.,Ltd. Hengshui Branch Pledgor: HEBEI JUWANG VEHICLE CO.,LTD. Registration number: Y2023980053306 |