65 results about "Lower body structure" patented technology

The purpose of the present invention is to provide a lower vehicle body structure for a vehicle, which can improve the energy absorption amount of a side member during a lateral collision of the vehicle and can improve the rigidity of the side member during normal travel. A lower vehicle body structure of a vehicle is provided with an outer reinforcement member (13) and an inner reinforcement member (14) inside a side member (2). Ridge lines (11f, 11g) extending in the front-rear direction (X) are respectively formed between an outer vertical wall part (11a) and an outer top plate part (11b) and between the outer vertical wall part (11a) and an outer bottom plate part (11c) of the side beam (2). The inner reinforcement member (14) is fixed to the inner vertical wall section (12a) and has a section (15) to be fitted to the outer reinforcement member (13) during a lateral collision of the vehicle. The outer reinforcement member (13) has a fitting section (18) that fits into the fitting section (15), and bracket sections (17a, 17b) that connect at least one of the outer vertical wall section (11a) and the outer top plate section (11b) and the outer vertical wall section (11a) and the outer bottom plate section (11c) across ridge lines (11f, 11g).

A vehicle lower body structure reduces upward displacement of a tunnel section due to a collision load applied from a vehicle lateral side. The structure includes a tunnel section protruding upward in a central position of a front floor panel in a vehicle width direction; a pair of left and right side sills extending in a vehicle front-rear direction at opposing lateral ends of the front floor panel in the vehicle width direction; a floor cross member coupling the pair of left and right side sills in the vehicle width direction across the tunnel section and fixed to an upper surface of the front floor panel; and a battery unit disposed below the front floor panel. A portion of the floor cross member across the tunnel section is coupled to the tunnel section and the battery unit via a coupling member.

The invention provides a doorsill beam, a lower vehicle body structure and a vehicle, the doorsill beam comprises a doorsill body and a doorsill inward extending body, in the second direction, the doorsill inward extending body is connected to the inner surface of the doorsill body, and the doorsill inward extending body is suitable for being connected with a seat cross beam; the doorsill beam is configured in the mode that in the second direction, when the outer surface of the doorsill body is collided, collision force is sequentially transmitted to the seat cross beam along the doorsill body and the doorsill inward extending body. According to the doorsill beam, the doorsill inward extending body is arranged, so that connection transition of the doorsill beam and the seat cross beam is smoother, when the outer surface of the doorsill body is collided, collision force can be transmitted to the seat cross beam along the doorsill body and the doorsill inward extending body in sequence, and the collision force transmission path is optimized; collision energy can be dispersed and absorbed more effectively, the risk of rollover of the seat cross beam during side column collision is reduced, and impact on a battery pack and a passenger compartment is reduced.

A vehicle floor frame provides improved ride quality and energy absorption. A wall section opposes a lower surface of a floor panel; an outer wall section extends from an outer end portion of the wall section toward the floor panel; an inner wall section extends from an inner end portion of the wall section toward the floor panel; and a hole and a bead reduce a dimension of the wall section when an impact load is applied from an outer side in a vehicle width direction. A nut plate in a closed cross section of the floor frame includes lateral wall fixed sections respectively fixed to the outer wall section and the inner wall section; an opposing wall fixed section fixed to the wall section; and deformation promoting sections configured to reduce a dimension in the vehicle width direction of the nut plate when the impact load is applied.

A vehicle lower body structure which efficiently transmits a side collision load from one side sill to the other side sill includes a pair of left and right side sills extending in a vehicle front-rear direction at opposed lateral ends of a front floor panel in a vehicle width direction; and plural floor cross members coupling the pair of left and right side sills in the vehicle width direction and fixed to an upper surface of the front floor panel. The floor cross members include a front cross member on a vehicle front side; a rear cross member on a vehicle rear side at a predetermined interval from the front cross member; and an intermediate cross member between the front cross member and the rear cross member in the vehicle front-rear direction and fixed to each of the front cross member and the rear cross member.

A vehicle lower body structure prevents transmission of a collision load to a battery during a side collision. A side sill having a closed cross-sectional structure extending in a vehicle front-rear direction has an outer wall portion, an inner wall portion, upper wall portions, lower wall portions, an outer reinforcement fixed to the outer wall portion, and an inner reinforcement fixed to the inner upper wall portion and the inner wall portion. A cross member extending in a vehicle width direction is fixed to the inner upper wall portion. A battery is supported by the inner lower wall portion. The outer reinforcement has an overlapping portion (connection surface portion) whose position overlaps a position of the inner reinforcement in an up-down direction, and the inner reinforcement is spaced apart from the inner lower wall portion in the up-down direction.

The reinforcement for the side sills increases the amount of energy absorbed from side impacts. [Solution] The lower body structure 1 of the vehicle 100 has a floor panel 2, a side sill 3, and a reinforcement 30 that is located inside the side sill 3 and extends in the front-rear direction. The reinforcement 30 has an upper wall 31, a lower wall 32, an outer wall 33, and an inner wall 34. The reinforcement 30 further has one or more vertical walls 35 that connect the upper wall 31 and the lower wall 32 between the outer wall 33 and the inner wall 34 and extend in the front-rear direction, and the internal space S is divided in the vehicle width direction by the vertical walls 35 to divide it into a plurality of closed cross-sectional sections S1 to S3. At least one of the upper wall 31 and the lower wall 32 has a groove 36 that extends in the front-rear direction along the entire length of the reinforcement 30 at at least one of the positions where the vertical wall 35 is connected.

To provide a lower body structure of a vehicle that can surely increase energy absorption amounts at the time of a side collision.SOLUTION: A vehicle body 1 comprises a first reinforcement 5, a second reinforcement 6 and a third reinforcement 7 which are arranged inside a closed cross section 2a of a side sill 2. The first reinforcement 5 is formed in a hat shape having an upper wall part 5a and a lower wall part 5b and a vertical wall part 5c extending in a vertical direction. The second reinforcement part 6 forms a plurality of first closed cross sections 8 in cooperation with the upper wall part 5a. The third reinforcement 7 forms a plurality of second closed cross sections 8 in cooperation with the lower wall part 5b.SELECTED DRAWING: Figure 4

This invention discloses a topology optimization method for the stiffening layout of an integrated die-cast and extruded electric vehicle underbody structure, relating to the field of electric vehicles. The method involves finite element mesh generation for the electric vehicle underbody structure, classifying the mesh into extrusion meshes and casting meshes based on the processing technology used for the components. The finite element mesh within a single component is further subdivided into design domains and non-design domains. For the casting design domain, a mathematical model of casting constraints is established to optimize the stiffening of thin-walled die-cast parts. For the extrusion design domain, an extrusion process constraint is applied to establish a mathematical model to optimize the internal stiffening of the cross-section. The mathematical model is solved to obtain the density distribution of each element, determining the stiffening layout form that satisfies both comprehensive service conditions and dual manufacturing process constraints. Based on the calculated element density distribution and load transfer path, the topology optimization results are reconstructed into a CAD model or mesh model with stiffeners.

To provide a lower body structure of a vehicle that can surely increase energy absorption amounts at the time of a side collision.SOLUTION: A vehicle body 1 comprises a first reinforcement 5 (a main reinforcement) and a third reinforcement 7 (a sub reinforcement) which are arranged inside a closed cross section 2a of a side sill 2. The first reinforcement 5 is formed in a hat shape having an upper wall part 5a (a second wall part) and a lower wall part 5b (a first wall part) and a vertical wall part 5c extending in a vertical direction. The third reinforcement 7 forms a plurality of second closed cross sections 9 (sub closed cross sections) in cooperation with the lower wall part 5b. The third reinforcement 7 is arranged on a lower surface 5b1 of the lower wall part 5b. A side sill inner 22 has a corner part 22b3 that is a deformation promoting part 24 that deforms toward inside of the side sill 2 to contact the third reinforcement 7 from outside in the vertical direction at the time of a side collision of a vehicle.SELECTED DRAWING: Figure 4

The invention provides a lower vehicle body structure and a vehicle. The lower vehicle body structure comprises a lower vehicle body framework, a rear auxiliary frame and a battery pack. The lower vehicle body framework comprises rear floor longitudinal beams arranged on the left side and the right side respectively and a rear floor middle cross beam connected between the two rear floor longitudinal beams, the battery pack comprises a battery pack frame and a battery pack body, the rear end of the battery pack frame extends to the position below the rear floor middle cross beam, and the rear auxiliary frame is provided with a rear auxiliary frame front cross beam close to the battery pack. The left end and the right end of the rear auxiliary frame front cross beam are connected with the battery pack frame and the rear floor middle cross beam, the rear floor middle cross beam and the rear auxiliary frame front cross beam are connected to form a first annular structure, and the rear floor middle cross beam and the battery pack are connected to form a second annular structure. According to the lower vehicle body structure, the local rigidity and the overall rigidity of the vehicle can be improved, a force transmission channel between the battery pack frame and the rear auxiliary frame can be additionally arranged on each of the left side and the right side of the vehicle body, and the crashworthiness of the vehicle can be well improved.

The present application aims at providing a lower vehicle body structure which can suppress the view of a muffler from the rear of a vehicle, improve the aesthetic appearance, and suppress the intake of under-floor traveling air behind a rear bumper, thereby improving the aerodynamic characteristics. A shielding member (60) is provided between a rear bumper (4) and a muffler (10), the shielding member (60) overlapping at least a rear longitudinal wall (10b) of the muffler (10) in the up-down direction and extending in the vehicle width direction in the rear view of the vehicle, a guide portion (62) being provided in the shielding member (60) to guide under-floor traveling air flowing rearward at the lower portion of the muffler (10) downward.

In order to suppress a side beam front end portion from collapsing and obtain a reaction force in a vehicle width direction against an impact load directed inward in the vehicle width direction input to the side beam front end portion at a small overlap collision, a vehicle lower body structure of the present invention is provided with: a side beam (10) disposed at a lower portion of a vehicle and at an outer side in the vehicle width direction, a closed cross section (10s) extending in a vehicle front-rear direction being formed by an inner side beam (11) and an outer side beam (21) in cooperation; a wheel (6) located in front of the outer side beam (21); an outer side reinforcing member (50) having a shape along a front side surface portion (271) and a side surface portion (24) of a front end portion (27) of the outer side beam (21), and being joined to the front end portion (27) from an inner side of the closed cross section (10s); and an inner side reinforcing member (60) linking between a front side surface portion (171) and a side surface portion (14) of a front end portion (17) of the inner side beam (11) in a cross shape.

This invention discloses a front lower body structure for a vehicle with improved rigidity, the front lower body structure comprising: a front rear lower member, a central floor side upper member, and a reinforcing bracket, the front rear lower member being connected from a front member arranged on one side of a fender to the interior of a longitudinal beam; the central floor side upper member being arranged in the longitudinal direction of the vehicle and extending from the upper surface of the front bulkhead to the central floor panel; the reinforcing bracket connecting the front rear lower member to the central floor side upper member.

The embodiment of the utility model provides a lower vehicle body structure and a vehicle, and belongs to the technical field of vehicle parts, and the lower vehicle body structure comprises a doorsill beam, an inner exhaust pipe, an outer exhaust pipe and a limiting connecting assembly. A containing cavity is formed in the doorsill beam, and an opening communicating with the containing cavity is formed in one side of the doorsill beam; the inner exhaust pipe is arranged in the containing cavity, and the outer exhaust pipe is located on one side of the doorsill beam and communicates with the inner exhaust pipe through the opening; and the limiting connecting assembly is arranged in the containing cavity, the threshold beam and the inner exhaust pipe are connected through the limiting connecting assembly, and the limiting connecting assembly is configured to stretch out and draw back in the preset direction when the inner exhaust pipe vibrates so that the inner exhaust pipe can move relative to the threshold beam. According to the lower vehicle body structure provided by the embodiment of the invention, the problem of resonance of the threshold beam caused by vibration of the exhaust pipe can be avoided, so that the NVH performance of the vehicle is improved.

The present invention provides a vehicle body lower structure, which can avoid the load of snow and the like when snow and the like infiltrate the lower cover to prevent the lower cover from being damaged. The vehicle body lower structure is provided with an undercover (7) covering a portion of a trailing arm (5) from below. The undercover (7) has a front cover portion (71) extending from the front of the trailing arm (5) to a position covering the front portion (51) of the trailing arm (5), and a rear cover portion (72) extending continuously toward the rear from the center portion in the vehicle width direction of the rear end portion (71a) of the front cover portion (71). The undercover (7) is fixed to the vehicle body (1) by a first fastening portion (73a) arranged in front of the rear end portion (71a) and arranged on the outside in the vehicle width direction compared to the trailing arm (5), and a second fastening portion (73b) arranged in the rear of the first fastening portion (73a) and arranged on the inside in the vehicle width direction compared to the trailing arm (5).

The present invention provides a lower body structure that can transmit loads applied to the vehicle body from the front to the side sills. [Solution] The lower body structure comprises a pair of side sills, reinforcements positioned inside each side sill and extending in the front-rear direction, and brackets connecting the side sills and reinforcements to each other. The side sill comprises a side sill inner and a side sill outer fixed to the outside of the side sill inner in the vehicle width direction and forming a closed cross section together with the side sill inner. The bracket comprises an upper wall extending in the vehicle width direction and fixed to the lower surface of the reinforcement, an inner wall extending downward from the inner end of the upper wall in the vehicle width direction and fixed to the side sill inner, and an outer wall extending downward from the outer end of the upper wall in the vehicle width direction and fixed to the side sill inner and the side sill outer.

The present invention discloses a method for manufacturing a light bus body-in-white lower body structure, comprising the following steps: S01: preparing a cabin floor assembly and a rear frame assembly according to a mold; S02: preparing a front panel assembly according to a chassis suspension configuration; S03: preparing a front longitudinal beam assembly according to the chassis suspension configuration; S04: welding the cabin floor assembly and the front panel assembly to form the upper portion of the body-in-white lower body structure; and welding the rear frame assembly and the front longitudinal beam assembly to form the lower portion of the body-in-white lower body structure. By adopting the technical solution of the present invention, when the chassis suspension of a light bus is switched, the corresponding body-in-white lower body structure does not need to be completely switched. Instead, only the front panel assembly and the front longitudinal beam assembly need to be newly prepared according to the chassis suspension configuration, while the original cabin floor assembly and rear frame assembly can be retained and prepared. This allows for rapid completion of a complete switch of the body-in-white lower body structure, saving significant time and manufacturing costs while also enabling rapid adaptation to diverse usage scenarios and functions.

The utility model relates to the technical field of robots, in particular to a robot lower limb structure and a robot, which are provided with a hip base and two robot legs for realizing the movement of the lower body of the robot; wherein the robot leg comprises a hip transmission mechanism and a leg transmission mechanism; the hip transmission mechanism is integrated with a first rotating assembly and a second rotating assembly which are vertically arranged, and is used for driving the legs of the robot to make multi-angle side-sway movement; in addition, the hip transmission mechanism is further integrated with a first power module and a second power module which are oppositely arranged and used for driving thighs and shanks of the robot to swing front and back correspondingly. The first power module and the second power module are integrated to the hip, a larger bending space is provided for the knee position of the robot, and then more complex movement requirements are met. The power part is highly integrated, so that the lower half body of the robot is more compact in structure, and miniaturization is achieved.

The invention provides a lower vehicle body structure of a vehicle, which can ensure safety when a collision load is input and can ensure a high degree of freedom of a design related to the arrangement of a seat in a cabin. A vehicle is provided with a floor panel, a vehicle seat, a battery disposed below the floor panel, and a battery outer cross member (8) extending in the vehicle width direction between the floor panel and a battery case. A battery case (71) in a battery has internal beams (725-727) extending in the front-rear direction below a lid (73) and connecting outer peripheral walls facing each other in a case main body (72). The battery outer cross beam (8) is fixed to the inner beams (725-727) in a state of sandwiching the cover body (73), and is fixed to the seat rail in a state of sandwiching the floor panel.

The invention discloses a casting and extruding integrated electric automobile lower body structure reinforcement layout topological optimization method, and relates to the field of electric automobiles, the method comprises the following steps: carrying out finite element mesh division on an electric automobile lower body structure, and classifying finite element meshes into extrusion part meshes and casting part meshes according to the types of processing technologies adopted by parts; carrying out secondary division on a finite element grid in a single part, and subdividing the finite element grid into a design domain and a non-design domain; aiming at a casting design domain, a mathematical model of casting constraint is established, and optimization of external reinforcement of the thin-wall die casting is realized; applying extrusion process constraint to an extrusion design domain to establish a mathematical model, and realizing optimization of internal reinforcement of the extrusion structure; solving the mathematical model, obtaining the density distribution of each unit, and determining a reinforcement layout form meeting the comprehensive service condition and the dual manufacturing process constraint; and reconstructing a topological optimization result into a CAD (Computer Aided Design) model or a grid model with reinforcing ribs according to the calculated unit density distribution and load transfer path.

This mechanism prevents the load applied by the jack from being transferred to the battery frame during jacking up. [Solution] The lower body structure of the vehicle, which includes a battery housing 6 positioned below the floor panel 4 and a battery frame 20 that supports the battery housing 6 and is attached to the side sill 10, includes a jack attachment 30 positioned on the lower surface portion 23 of the battery frame 20 and a collar member 40 for attaching the jack attachment 30. The collar member 40 is inserted through the jack attachment 30 and the battery frame 20 and contacts the side sill 10, and is attached to the side sill 10 using fastening members B1 and N1, and a jack contact portion 47 is provided on the lower surface portion 45 of the collar member 40.

A vehicle lower body structure ensures desired side collision performance when a floor panel is joined to a portion higher than a center position of a side sill. A floor cross member coupling a pair of left and right side sills includes an upper member fixed to a floor panel upper surface protruding upward in the vehicle, and having a cross member upper surface facing upward in the vehicle; and a lower member fixed to a floor panel lower surface and protruding downward in the vehicle. The side sill and the floor cross member are joined to align positions of a side sill upper surface and the cross member upper surface in a vehicle up-down direction, and form a closed cross section with the front floor panel disposed between the upper member and the lower member, the upper member, and the lower member in a front-rear direction vertical cross section.

To provide a lower body structure of a vehicle that can surely increase energy absorption amounts at the time of a side collision.SOLUTION: A vehicle body 1 comprises a first reinforcement 5 and a second reinforcement 6 which are arranged inside a closed cross section 2a of a side sill 2. The first reinforcement 5 is formed in a hat shape having an upper wall part 5a (a first wall part) and a lower wall part 5b (a second wall part) and a vertical wall part 5c extending in a vertical direction. The upper wall part 5a is formed to incline in an upper direction in which the part gradually separates from the lower wall part 5b toward inside in a vehicle width direction thereof. The second reinforcement 6 forms a plurality of first closed cross sections 8 in cooperation with the upper wall part 5a.SELECTED DRAWING: Figure 4

To provide a lower body structure of a vehicle that can surely increase energy absorption amounts at the time of a side collision.SOLUTION: A vehicle body 1 comprises a first reinforcement 5 and a second reinforcement 6 which are arranged inside a closed cross section 2a of a side sill 2. The first reinforcement 5 is formed in a hat shape having an upper wall part 5a (a first wall part) and a lower wall part 5b (a second wall part) and a vertical wall part 5c extending in a vertical direction. The second reinforcement 6 forms a plurality of first closed cross sections 8 in cooperation with the upper wall part 5a. The second reinforcement 6 is arranged on an upper surface 5a1 pointing to outside of the first reinforcement 5 in the upper wall part 5a. A side sill outer 21 has a corner part 21a3 that is a deformation promoting part 23 that deforms to inside of the side sill 2 to contact the second reinforcement 6 from outside in the vertical direction at the time of a side collision of a vehicle.SELECTED DRAWING: Figure 4

In a closed cross-sectional space (3) in a side member (1), an impact absorbing structure (4) is provided by a vertical partition member (2) that vertically passes through the space. The shock absorbing structure part 4 is configured from a transverse partition member 5 that traverses the closed cross-sectional spaces 3a, 3b on the inside and outside of the vehicle body partitioned by the vertical partition member 2 in the vehicle width direction, and a partition plate 6 that is provided in the upper-side spaces 30a, 30b partitioned by the transverse partition member 5 in the vehicle width direction. A transverse partition member 5 and a bulkhead 6 on the inner and outer sides of the vehicle body are disposed so as to face each other with a vertical partition member 2 interposed therebetween, and a rib is formed on the transverse partition member 5 in the vehicle width direction. According to the side beam structure, expected collision characteristics can be obtained even if the number of partition plates (6) is reduced, and therefore high collision energy absorption characteristics can be obtained with small collision deformation while weight increase caused by structural members is restrained.

The present invention provides a lower body structure of a vehicle that can suppress side beam deformation during small overlap collisions without increasing the weight and manufacturing cost of the side beam. The side beam (2) constituting the body has an outer side beam (11) and an inner side beam (12). The upper side side portion (32A) (upper surface portion) and the lower side side portion (32B) (lower surface portion) of the inner side beam (12) are bent toward the inside of the side beam (2) to form a second bending portion (34) (bending portion). The inner side beam (12) has an upper inclined surface portion (36) and a lower inclined surface portion (39) (inclined surface portion) that are inclined toward the inner side beam (12) in the vertical direction as it approaches the outer side beam (11). The second upper surface portion (37) and the second lower surface portion (40) (vehicle width direction portion) extend from the second bending portion (34) toward the inside of the vehicle in the vehicle width direction.

The utility model relates to the technical field of humanoid robots, disclose a humanoid robot lower body structure and humanoid robot thereof, including first driver, second driver, third driver, fourth driver, fifth driver, sixth driver, waist structure, thigh structure, shank structure and foot structure, waist structure includes waist first support, waist second support, waist third support, waist connecting block and two waist connecting rods, through using six drivers, divide into two groups, three in each group, realize lower body structure multidirectional flexible movement, make lower body structure flexible simulation human leg's action. The multi -freedom degree design can improve the adaptability and stability of humanoid robot significantly, solve the problem that the flexibility, reliability is deficient when humanoid robot is applied in complex environment.