CN111746645A - Lightweight frame front end linking bridge - Google Patents
Lightweight frame front end linking bridge Download PDFInfo
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- CN111746645A CN111746645A CN202010605604.4A CN202010605604A CN111746645A CN 111746645 A CN111746645 A CN 111746645A CN 202010605604 A CN202010605604 A CN 202010605604A CN 111746645 A CN111746645 A CN 111746645A
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- 239000000725 suspension Substances 0.000 claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000006096 absorbing agent Substances 0.000 claims abstract description 9
- 230000035939 shock Effects 0.000 claims abstract description 9
- 239000013585 weight reducing agent Substances 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims description 41
- 230000003014 reinforcing effect Effects 0.000 claims description 23
- 230000007704 transition Effects 0.000 claims description 12
- 238000005266 casting Methods 0.000 abstract description 31
- 230000010354 integration Effects 0.000 abstract description 5
- 230000006872 improvement Effects 0.000 abstract description 4
- 238000005457 optimization Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008646 thermal stress Effects 0.000 description 4
- 230000008602 contraction Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
-
- 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
- B62D21/09—Means for mounting load bearing surfaces
-
- 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
- B62D21/11—Understructures, i.e. chassis frame on which a vehicle body may be mounted with resilient means for suspension, e.g. of wheels or engine; sub-frames for mounting engine or suspensions
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
A front end connecting support of a lightweight frame comprises a connecting support body, wherein towing hook mounting interfaces, bumper mounting interfaces, a cab front suspension fixing support mounting interface, a first cross beam mounting interface, a cab front suspension full-floating shock absorber support mounting interface, a wiring harness fixing support mounting interface, a water tank fixing support mounting interface, a steering engine support mounting interface and a front end casting front lower protection mounting interface are correspondingly arranged at different positions on the connecting support body respectively, and a front suspension fixing end support function part is additionally arranged on the connecting support body, so that the functional interface integration level of the support is high, the number of parts can be greatly reduced, the cost investment is reduced, and the modular design of the whole vehicle is facilitated; through adopting topological optimization to carry out lightweight design, not only weight reduction, structural design is more reasonable, and the homoenergetic satisfies the design demand under the intensity operating mode, and towing pintle pressure draws operating mode, preceding lower protection collision operating mode to have great improvement than former scheme factor of safety. The automobile is suitable for automobiles.
Description
Technical Field
The invention relates to the technical field of automobile chassis, in particular to a lightweight frame front end connecting bracket.
Background
At present, with the improvement of the requirement of customers on transportation timeliness, high horsepower, light weight and safety become the key points of development and attention of the whole vehicle. The matching of a high-horsepower engine inevitably leads to the structure that a front end connecting bracket is arranged at the front part of a frame due to the increase of volume parameters of the engine. The front end connecting bracket is used as a part of a frame, and not only needs to bear the complex impact load of a cab and a suspension caused by an uneven road in the running process of a vehicle, but also meets the requirements of the regulations of front-lower protection collision and towing hooks.
The existing front end connecting bracket has the defects of complex design structure, uneven stress, heavy weight, complex casting process, poor appearance attractiveness and the like due to the high integration level of a functional interface, the connection reliability with a frame and the requirement of installation function in order to ensure the structural strength of the front end connecting bracket.
Disclosure of Invention
The invention aims to provide a lightweight frame front end connecting bracket to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a lightweight frame front end linking bridge, includes the linking bridge body, one side of linking bridge body is equipped with tow hook installation interface and the bumper installation interface loading board that is used for the erection joint tow hook respectively, be equipped with the bumper installation interface that is used for the erection joint bumper on the bumper installation interface loading board, the opposite side of linking bridge body is equipped with front suspension stiff end support function portion that is used for undertaking front suspension stiff end support function, the top surface of linking bridge body is equipped with driver's cabin front suspension fixed bolster installation piece, be equipped with the driver's cabin front suspension fixed bolster installation interface that is used for the installation connection driver's cabin front suspension fixed bolster on the driver's cabin front suspension fixed bolster installation piece, the position of the middle part top of linking bridge body is equipped with first crossbeam installation interface that is used for the installation connection first crossbeam respectively, is used for the driver's cabin front suspension full-floating shock absorber support of erection joint driver's cabin front suspension full-floating shock absorber support The installation interface, be used for the pencil fixed bolster installation interface of erection joint pencil fixed bolster, be used for the water tank fixed bolster installation interface of erection joint water tank fixed bolster and be used for the steering gear support installation interface of erection joint steering gear support, the position of the middle part below of linking bridge body is equipped with the front end foundry goods that is used for the erection joint front end foundry goods to protect down before the front end foundry goods under the protection installation interface.
The connecting support body is correspondingly provided with a towing hook mounting interface, a bumper mounting interface, a cab front suspension fixed support mounting interface, a first cross beam mounting interface, a cab front suspension full-floating shock absorber support mounting interface, a wire harness fixed support mounting interface, a water tank fixed support mounting interface, a steering engine support mounting interface and a front-lower protection mounting interface at different positions, and a front suspension fixed end support functional part is additionally arranged on the connecting support body, so that the functional interface integration level of the connecting support is high, the number of parts can be greatly reduced, the cost input is reduced, and the modular design of the whole vehicle is facilitated; simultaneously, through adopting topological optimization to carry out lightweight design, not only weight reduction, structural design is more reasonable, and weight contrast original structure is reduced to 27kg by 37kg, and the homoenergetic satisfies the design demand under the intensity operating mode, and towing pintle pressure draws operating mode, preceding lower protection collision operating mode has great improvement than former scheme factor of safety.
Preferably, a towing hook mounting interface weight reducing groove is formed in the connecting support body corresponding to the towing hook mounting interface.
Preferably, a towing hook mounting interface reinforcing rib is further arranged on the connecting support body corresponding to the towing hook mounting interface.
Preferably, the front suspension fixed end bracket functional part is connected with the connecting bracket body through a transition connecting plate. The transition connecting plate not only can play the effect of supporting and connecting the front suspension fixed end bracket, but also can play the effect of connecting the frame.
Preferably, a web lightening hole is formed in the middle of the connecting support body.
Preferably, a water tank fixing support mounting interface reinforcing boss is arranged on the connecting support body corresponding to the water tank fixing support mounting interface.
Preferably, a steering engine bracket mounting interface reinforcing rib is arranged on the connecting bracket body corresponding to the steering engine bracket mounting interface. By avoiding the design of the large plane structure of the original scheme and adopting the form of the reinforcing ribs, the rigidity of the product is improved, meanwhile, the buckling deformation of the large plane during bulging, sinking and shrinkage, which is easy to generate in the casting process, is avoided, and the overall casting manufacturability of the product is improved.
Preferably, the outer wall of the steering engine bracket mounting interface is provided with a steering engine swing arm avoiding notch.
Preferably, a steering engine support mounting interface weight reduction groove is formed in the back face of the steering engine support mounting interface. The added weight reduction groove of the mounting interface of the steering engine bracket ensures that the wall thickness of the casting is uniform, and the uniform transition between the thickness and the thinness is natural and smooth, so that the cooling speed of the casting is uniform and consistent in the manufacturing process, thereby not only reducing a pouring system in the casting process, but also effectively preventing the defects of shrinkage cavity, thermal stress, cracks and the like and improving the casting quality of products; meanwhile, the mold taking process in the casting process is facilitated.
Preferably, the bottom surface of the connecting bracket body is provided with a front lower protection law collision reinforcing rib plate. The added front lower protection law collides with the reinforcing rib plate to prevent the connecting bracket body from breaking at the position corresponding to the front lower protection law.
Compared with the prior art, the invention has the beneficial effects that: the front end of the light frame is connected with a bracket;
1. the connecting support body is correspondingly provided with a towing hook mounting interface, a bumper mounting interface, a cab front suspension fixed support mounting interface, a first cross beam mounting interface, a cab front suspension full-floating shock absorber support mounting interface, a wire harness fixed support mounting interface, a water tank fixed support mounting interface, a steering engine support mounting interface and a front-lower protection mounting interface at different positions, and a front suspension fixed end support functional part is additionally arranged on the connecting support body, so that the functional interface integration level of the connecting support is high, the number of parts can be greatly reduced, the cost input is reduced, and the modular design of the whole vehicle is facilitated;
2. meanwhile, by adopting the topological optimization to carry out lightweight design, the weight is reduced, the structural design is more reasonable, the weight is reduced from 37kg to 27kg compared with the original structure, the design requirement can be met under the working condition of strength, and the safety coefficient of the towing hook under the working condition of pressing and pulling and the working condition of front-lower protection collision is greatly improved compared with the original scheme;
3. the transition connecting plate not only can play a role in supporting and connecting the fixed end bracket of the front suspension, but also can play a role in connecting the frame;
4. by avoiding the structural design of the large plane in the original scheme and adopting the form of the reinforcing ribs, the rigidity of the product is improved, meanwhile, the bulge, the depression and the buckling deformation during the contraction which are easily generated in the casting process of the large plane are avoided, and the integral casting manufacturability of the product is improved;
5. the added weight reduction groove of the mounting interface of the steering engine bracket ensures that the wall thickness of the casting is uniform, and the uniform transition between the thickness and the thinness is natural and smooth, so that the cooling speed of the casting is uniform and consistent in the manufacturing process, thereby not only reducing a pouring system in the casting process, but also effectively preventing the defects of shrinkage cavity, thermal stress, cracks and the like and improving the casting quality of products; meanwhile, the mold taking process in the casting process is facilitated;
6. the added front lower protection law collides with the reinforcing rib plate to prevent the connecting bracket body from breaking at the position corresponding to the front lower protection law.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic perspective view of another embodiment of the present invention;
FIG. 3 is a schematic front view of the present invention;
FIG. 4 is a left side view of the present invention;
FIG. 5 is a schematic diagram of the right-view structure of the present invention;
FIG. 6 is a schematic top view of the present invention;
FIG. 7 is a schematic bottom view of the present invention;
FIG. 8 is a rear view of the present invention;
fig. 9 is a schematic perspective view of the present invention.
In the figure: a connecting bracket body 1, a towing hook mounting interface 2, a towing hook mounting interface lightening groove 2a, a towing hook mounting interface reinforcing rib 2b, a bumper mounting interface bearing plate 3, a bumper mounting interface 3a, a front suspension fixed end bracket functional part 4, a cab front suspension fixed bracket mounting block 5, a cab front suspension fixed bracket mounting interface 5a, a first beam mounting interface 6, a cab front suspension full-floating shock absorber bracket mounting interface 7, a wire harness fixed bracket mounting interface 8, a water tank fixed bracket mounting interface 9, a water tank fixed bracket mounting interface reinforcing boss 9a, a steering gear bracket mounting interface 10, a steering gear bracket mounting interface reinforcing rib 10a, a steering gear swing arm lightening notch 10b, a steering gear bracket mounting interface lightening groove 10c, a front end casting front lower protection mounting interface 11, a transition connecting plate 12 and a web lightening hole 13, the front lower protection law collides against the gusset 14.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-9, the present invention provides a technical solution: the utility model provides a lightweight frame front end linking bridge, includes linking bridge body 1, one side of linking bridge body 1 is equipped with tow hook installation interface 2 and bumper installation interface loading board 3 that are used for the erection joint tow hook respectively, be equipped with bumper installation interface 3a that is used for the erection joint bumper on bumper installation interface loading board 3, the opposite side of linking bridge body 1 is equipped with front suspension stiff end support function portion 4 that is used for undertaking front suspension stiff end support function, the top surface of linking bridge body 1 is equipped with driver's cabin front suspension fixed bolster installation piece 5, be equipped with driver's cabin front suspension fixed bolster installation interface 5a that is used for erection joint driver's cabin front suspension fixed bolster on driver's cabin front suspension fixed bolster installation piece 5, the position of the middle part top of linking bridge body 1 is equipped with first crossbeam installation interface 6 a that is used for erection joint first crossbeam respectively, A protection installation interface 11 down before the front end foundry goods that is used for the installation to connect the front end foundry goods of protection under the front of the front end foundry goods is equipped with to be used for the installation to connect the position of connecting bracket body 1's middle part below and is used for the installation to connect the front end foundry goods front suspension full-floating shock absorber support mounting interface 7, be used for the pencil fixed bolster installation interface 8 of erection joint pencil fixed bolster, be used for the water tank fixed bolster installation interface 9 of erection joint water tank fixed bolster and be used for the erection joint to turn to quick-witted support mounting interface 10 that turns to of quick-witted support.
And a towing hook mounting interface lightening groove 2a is arranged on the connecting support body 1 corresponding to the towing hook mounting interface 2. And a towing hook mounting interface reinforcing rib 2b is arranged on the connecting bracket body 1 corresponding to the towing hook mounting interface 2. The front suspension fixed end bracket functional part 4 is connected with the connecting bracket body 1 through a transition connecting plate 12. The transition connecting plate 12 not only can play a role in supporting and connecting the fixed end bracket of the front suspension, but also can play a role in connecting the frame. And a web lightening hole 13 is formed in the middle of the connecting bracket body 1. And a water tank fixing support mounting interface reinforcing boss 9a is arranged on the connecting support body 1 corresponding to the water tank fixing support mounting interface 9.
And a steering engine bracket mounting interface reinforcing rib 10a is arranged on the connecting bracket body 1 corresponding to the steering engine bracket mounting interface 10. By avoiding the design of the large plane structure of the original scheme and adopting the form of the reinforcing ribs, the rigidity of the product is improved, meanwhile, the buckling deformation of the large plane during bulging, sinking and shrinkage, which is easy to generate in the casting process, is avoided, and the overall casting manufacturability of the product is improved. And a steering engine swing arm avoiding notch 10b is arranged on the outer wall of the steering engine support mounting interface 10. And a steering machine support mounting interface weight reduction groove 10c is formed in the back of the steering machine support mounting interface 10. The weight reduction groove 10c of the mounting interface of the steering engine bracket is additionally arranged, so that the wall thickness of the casting is uniform, and the uniform transition between the thickness and the thickness is natural and smooth, so that the cooling speed of the casting is uniform and consistent in the manufacturing process, a pouring system in the casting process is reduced, the defects of shrinkage cavities, thermal stress, cracks and the like are effectively prevented, and the casting quality of a product is improved; meanwhile, the mold taking process in the casting process is facilitated.
The bottom surface of the connecting bracket body 1 is provided with a front lower protection law collision reinforcing rib plate 14. The added front lower protection law collides with the reinforcing rib plate 14 to prevent the connecting bracket body 1 from breaking at the position corresponding to the front lower protection law.
In the embodiment, the towing hook mounting interface 2, the bumper mounting interface 3a, the cab front suspension fixing support mounting interface 5a, the first cross beam mounting interface 6, the cab front suspension full-floating shock absorber support mounting interface 7, the wire harness fixing support mounting interface 8, the water tank fixing support mounting interface 9, the steering engine support mounting interface 10 and the front lower protection mounting interface 11 are respectively and correspondingly arranged at different positions on the connecting support body 1, and the front suspension fixing end support functional part 4 is additionally arranged on the connecting support body 1, so that the functional interface integration level of the connecting support is high, the number of parts can be greatly reduced, the cost input is reduced, and the modular design of the whole vehicle is facilitated; meanwhile, the light weight design is carried out by adopting topology optimization, so that the weight is reduced, and the structural design is more reasonable. Weight is reduced to 27kg by 37kg to the original structure, and the design demand can all be satisfied under the intensity operating mode, and towing pintle pressure draws operating mode, preceding lower protection collision operating mode has great improvement than former scheme factor of safety.
In addition, the transition connecting plate 12 in this embodiment not only can play a role of supporting and connecting the fixed end bracket of the front suspension, but also can play a role of connecting the frame; by avoiding the structural design of the large plane in the original scheme and adopting the form of the reinforcing ribs, the rigidity of the product is improved, meanwhile, the bulge, the depression and the buckling deformation during the contraction which are easily generated in the casting process of the large plane are avoided, and the integral casting manufacturability of the product is improved; the added front lower protection law collides with the reinforcing rib plate 14 to prevent the connecting bracket body 1 from breaking at the position corresponding to the front lower protection law.
Moreover, the added weight-reducing groove 10c of the mounting interface of the steering engine bracket ensures that the wall thickness of the casting is uniform, and the uniform transition between the thickness and the thinness is natural and smooth, so that the cooling speed of the casting is uniform and consistent in the manufacturing process, thereby reducing a pouring system in the casting process, effectively preventing the defects of shrinkage cavity, thermal stress, cracks and the like, and improving the casting quality of the product; meanwhile, the mold taking process in the casting process is facilitated.
Those not described in detail in this specification are within the skill of the art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a lightweight frame front end linking bridge, includes linking bridge body (1), its characterized in that: one side of linking bridge body (1) is equipped with tow hook installation interface (2) and bumper installation interface loading board (3) that are used for erection joint tow hook respectively, be equipped with bumper installation interface (3a) that are used for erection joint bumper on bumper installation interface loading board (3), the opposite side of linking bridge body (1) is equipped with preceding suspension stiff end support function portion (4) that are used for undertaking preceding suspension stiff end support function, the top surface of linking bridge body (1) is equipped with preceding suspension fixed bolster installation piece (5) of driver's cabin, be equipped with preceding suspension fixed bolster installation interface (5a) of driver's cabin that are used for erection joint preceding suspension fixed bolster on preceding suspension fixed bolster installation piece (5) of driver's cabin, the position of the middle part top of linking bridge body (1) is equipped with first crossbeam installation interface (6) that are used for erection joint first crossbeam respectively, A protection installation interface (11) down before the front end foundry goods that is used for the installation to connect the front end foundry goods of protection before the front end foundry goods, a driver's cabin front suspension all floats bumper shock absorber support mounting interface (7), a pencil fixed bolster mounting interface (8) that is used for the erection joint pencil fixed bolster, a water tank fixed bolster mounting interface (9) that is used for the erection joint water tank fixed bolster and be used for the erection joint to turn to quick-witted support mounting interface (10) of turning to of quick-witted support, the position of the middle part below of linking bridge body (1) is equipped with and is used for the installation to connect the front end foundry goods of protection under before the front.
2. The front end connecting bracket of a light-weight vehicle frame according to claim 1, characterized in that: and a towing hook mounting interface lightening groove (2a) is formed in the position, corresponding to the towing hook mounting interface (2), of the connecting support body (1).
3. The front end connecting bracket of a light-weight vehicle frame according to claim 1, characterized in that: the connecting support body (1) is further provided with tow hook mounting interface reinforcing ribs (2b) corresponding to the tow hook mounting interfaces (2).
4. The front end connecting bracket of a light-weight vehicle frame according to claim 1, characterized in that: the front suspension fixed end support functional part (4) is connected with the connecting support body (1) through a transition connecting plate (12).
5. The front end connecting bracket of a light-weight vehicle frame according to claim 1, characterized in that: and a web lightening hole (13) is formed in the middle of the connecting support body (1).
6. The front end connecting bracket of a light-weight vehicle frame according to claim 1, characterized in that: and a water tank fixing support mounting interface reinforcing boss (9a) is arranged on the connecting support body (1) corresponding to the water tank fixing support mounting interface (9).
7. The front end connecting bracket of a light-weight vehicle frame according to claim 1, characterized in that: and a steering machine support mounting interface reinforcing rib (10a) is arranged on the connecting support body (1) corresponding to the steering machine support mounting interface (10).
8. The front end connecting bracket of a light-weight vehicle frame according to claim 1, characterized in that: and a steering machine swing arm avoiding notch (10b) is arranged on the outer wall of the steering machine support mounting interface (10).
9. The front end connecting bracket of a light-weight vehicle frame according to claim 1, characterized in that: and a steering machine support mounting interface weight reduction groove (10c) is formed in the back of the steering machine support mounting interface (10).
10. The front end connecting bracket of a light-weight vehicle frame according to claim 1, characterized in that: the bottom surface of the connecting bracket body (1) is provided with a front lower protection law collision reinforcing rib plate (14).
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CN202010605604.4A CN111746645A (en) | 2020-06-29 | 2020-06-29 | Lightweight frame front end linking bridge |
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CN202010605604.4A CN111746645A (en) | 2020-06-29 | 2020-06-29 | Lightweight frame front end linking bridge |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113120092A (en) * | 2021-05-31 | 2021-07-16 | 东风商用车有限公司 | Front-end casting assembly connected by transition support and steering gear installation assembly |
CN113460163A (en) * | 2021-08-05 | 2021-10-01 | 太原市三高能源发展有限公司 | Front connecting beam steering gear assembly for automobile |
CN113895519A (en) * | 2021-11-19 | 2022-01-07 | 一汽解放汽车有限公司 | Front lengthening beam combined support |
CN114802458A (en) * | 2022-05-05 | 2022-07-29 | 一汽解放汽车有限公司 | Integrated support of preceding extension beam, frame front end assembly and vehicle |
US11987290B2 (en) | 2022-09-14 | 2024-05-21 | Caterpillar Inc. | Suspension connection weldment |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113120092A (en) * | 2021-05-31 | 2021-07-16 | 东风商用车有限公司 | Front-end casting assembly connected by transition support and steering gear installation assembly |
CN113460163A (en) * | 2021-08-05 | 2021-10-01 | 太原市三高能源发展有限公司 | Front connecting beam steering gear assembly for automobile |
CN113895519A (en) * | 2021-11-19 | 2022-01-07 | 一汽解放汽车有限公司 | Front lengthening beam combined support |
CN114802458A (en) * | 2022-05-05 | 2022-07-29 | 一汽解放汽车有限公司 | Integrated support of preceding extension beam, frame front end assembly and vehicle |
US11987290B2 (en) | 2022-09-14 | 2024-05-21 | Caterpillar Inc. | Suspension connection weldment |
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Application publication date: 20201009 |