2623 results about "Body frame" patented technology

The invention discloses a new energy automobile body frame lightweight design method based on digital twinning, and relates to the technical field of new energy automobile body structure design and computer-aided engineering simulation, and the method comprises the following steps: S1, building a digital twinning body connected with a physical automobile body sensing system; s2, a dynamic precision topology network module is used for dynamically dividing a simulation precision area of the vehicle body frame according to the mechanical energy transmission path and the real-time sensing data. According to the new energy automobile body frame lightweight design method based on digital twinning, intelligent allocation of computing resources is realized through a dynamic precision topology network, and the computing burden of multi-physics coupling simulation is effectively reduced while precise prediction of a key structure is ensured; the sharp contradiction among the model precision, the real-time response and the optimization efficiency is effectively solved, and effective closed-loop iteration of the lightweight design is achieved under the complex constraint condition.

The invention discloses a steel structure welding guiding and positioning device, which relates to the technical field of steel structure processing, and comprises a main body supporting frame, a workpiece dynamic limiting and conveying unit and a self-centering clamping and welding module, and is matched with a guiding and feeding mechanism, a self-adaptive reducing connecting cabin and a multi-dimensional self-adaptive welding gun executing mechanism to realize integrated welding and positioning. The main body frame serves as a bearing foundation, the guide feeding mechanism drives guide rollers to stably feed through meshing transmission, the stability is improved through a surface pattern sleeve, the dynamic limiting unit forms bidirectional limiting through an adjusting screw, a cross connecting rod and a driving limiting shaft rod and is adaptive to different workpieces, and the self-centering clamping module adjusts the distance through gear transmission. A profiling clamping jaw is matched with a spring to achieve self-adaptive clamping, an anti-vibration pad protects a workpiece, a self-adaptive connecting cabin adjusts the height of a welding gun, a multi-dimensional welding gun mechanism achieves accurate alignment in the X direction and the Z direction, all parts of the device are in cooperative linkage, the welding positioning accuracy and adaptability are improved, and the welding quality of a steel structure is guaranteed.

The invention discloses a multi-arch tunnel special-shaped mid-partition trolley which comprises a trolley body frame, an arch-shaped connecting support is arranged at the front end of the top of the trolley body frame, the arch-shaped connecting support is of an arc-shaped structure, the radian of the arch-shaped connecting support is matched with the shape of the top of a mid-partition steel reinforcement framework, and the arch-shaped connecting support is fixed to the front end of a top cross beam of the trolley body frame in a welded mode. The support is used for supporting the whole trolley to be stable and guiding the trolley to pass through a bound reinforcement cage; the formwork system of the trolley body frame comprises a top special-shaped formwork and a bottom corner formwork, the top special-shaped formwork is fixed below a top cross beam of the trolley body frame, the shape of the top special-shaped formwork is consistent with the special-shaped outline of a middle partition wall top pre-buried steel plate area, and the edge of the top special-shaped formwork is detachably connected with the top of a side large formwork of the trolley body frame through bolts. The problems that in the prior art, the construction process is low in efficiency, one-time pouring is difficult, formwork abrasion is large, and narrow space adaptability is poor are solved, and the beneficial effects of being high in construction efficiency, stable in structure, convenient and fast to operate and the like are achieved.

The invention provides a sprinkling irrigation device and a sprinkling irrigation adjusting method, and the device comprises a spanning frame which extends along a first direction; the supporting frames are arranged side by side in the first direction and fixedly connected to the lower portion of the straddle body frame; the guide wheel is rotationally installed below the supporting frame, and the advancing direction of the guide wheel is configured to be in the second direction; the adjusting device is connected to the supporting frame, the adjusting device is connected with a sprinkling irrigation head, and the adjusting device is configured to adjust the sprinkling irrigation height and the sprinkling irrigation direction of the sprinkling irrigation head; the control device is connected with the guide wheels and the adjusting device and determines the control state according to starting and stopping of the guide wheels. In the first state, the sprinkling directions of the sprinkling nozzles are controlled to at least face the first direction, and the sprinkling distances of the sprinkling nozzles intersect between the adjacent supporting frames; in the second state, the spraying direction of the sprinkling nozzles in the advancing direction of the guide wheels is controlled to be away from the advancing direction of the guide wheels. The height of the sprinkler head is adjusted by the adjusting device according to the height of crops, and effective and uniform irrigation is achieved.

The invention discloses a polishing device and a polishing method for an inner curved surface of a steel casting, and relates to the technical field of cast steel production. The device comprises a main body frame and a polishing device, wherein the main body frame comprises a mounting table arranged on the main body frame; the stirring mechanism comprises a plurality of profiling plates which are mounted on the mounting table and used for stirring abrasive particle flow in the casting blank, and a plurality of rotating wheels are rotationally mounted on the inner wall of each profiling plate; the back pressure mechanism is used for driving the profiling plate to enter the casting blank; the rotating wheel is driven to rotate through resistance of abrasive particle flow, so that the abrasive particle flow completes switching between the distance from the abrasive particle flow to the central axis of the casting blank, and meanwhile, in the revolution process of the profiling plate, the abrasive particle flow in the casting blank is extruded up and down in a reciprocating mode through the action of a reciprocating mechanism; and the abrasive particle flow circularly polishes the inner wall of the casting blank up and down, so that the purposes of fully switching and contacting the abrasive particle flow and the inner wall of the casting blank, ensuring the polishing quality and improving the polishing efficiency are achieved.

Provided is a roller device for transporting heavy objects, which has a lower overall height than conventional roller devices for transporting heavy objects and can keep the overall height low even when a top plate for placing heavy objects is provided. 【Solution means】 A roller device 10 for transporting heavy objects, which is used to carry and transport heavy objects, includes a thick plate-shaped main body frame 11 having a plurality of openings 11c, and a plurality of tires 12 provided across the openings. The overall height H1 from the floor surface is set to be 24 mm or more and 28 mm or less. When a top plate 13 is provided, the upper surface of the main body frame has a step dug down by 1.0 mm or more and 2.0 mm or less in a circular shape into which the top plate fits.

The utility model discloses an underground narrow space mine car steering platform, which belongs to the technical field of mine car steering, and comprises an underground mine tunnel, a main body frame is arranged on the top surface of the underground mine tunnel, a rotary support shaft is rotatably connected onto the main body frame, a steering table is fixedly connected to the top end of the rotary support shaft, and a steering wheel is arranged on the steering table. A push-pull mechanism is arranged on the top face of the steering table, and two movable rails are arranged on the top face of the steering table. According to the mine car steering device, when a mine car needs to be steered underground, the mine car is moved to the movable rail from the car inlet rail, the steering table, the movable rail and the mine car are pushed by the steering hydraulic cylinder to rotate around the rotary supporting shaft, and the end of the movable rail is aligned to the car outlet rail; and therefore, the function of adjusting the direction of the mine car in a narrow underground space is realized.

The invention discloses an assembly type power switch cabinet, and particularly relates to the technical field of power switch cabinets, the assembly type power switch cabinet comprises a cabinet body frame, a cabinet door, a top plate, a back plate, a bottom plate and two side plates, the cabinet body frame comprises an upper frame body, a lower frame body and four vertical pipes, and the four vertical pipes are distributed between the upper frame body and the lower frame body in a rectangular shape; insertion blocks are welded and fixed to the bottom of the upper frame body and the top of the lower frame body, and insertion holes for the insertion blocks to be inserted are formed in the two ends of each vertical pipe correspondingly, and the insertion blocks on the upper frame body and the insertion blocks on the lower frame body are directly inserted into the four vertical pipes correspondingly. The upper frame body, the lower frame body and the vertical pipes can be locked through the locking mechanism, and meanwhile, the two vertical pipes can be further tensioned, so that the assembling operation of the power switch cabinet can be quickly completed. Therefore, the assembly of the whole power switch cabinet is more efficient.

A lower vehicle body frame assembly includes a frame body; a footrest plate coupled to a side of the frame body; and a rear cross beam coupled to a side of the frame body away from the footrest plate. The frame body, the footrest plate and the rear cross beam are integrally formed.

The utility model discloses a bed body frame of a seedling raising bed, which is used for placing hole trays for seedling raising and comprises a plurality of cross beam section bars, a plurality of supporting pipe columns and connecting rods, the cross beam section bars are arranged in parallel, the supporting pipe columns are also arranged below the cross beam section bars vertically, and the connecting rods are connected with the cross beam section bars. The adjacent supporting pipe columns are connected through the connecting rods. Each cross beam sectional material comprises a cross plate and a separation part, the separation part is vertically arranged on the upper surface of the cross plate, a sliding groove is formed by the separation part and the upper surface of the cross plate, and the hole tray is placed on the sliding groove of the adjacent cross beam sectional material and can slide in a reciprocating mode along the sliding groove. The hole tray is simple in structure, high in strength, high in precision, good in stability and capable of enabling the hole tray to slide smoothly in the sliding groove.

A work vehicle includes a cab frame and a vehicle body frame having a vehicle body front portion and a vehicle body rear portion. The vehicle body rear portion includes an upper support frame, and a first support base provided on the upper support frame in a height direction. The first support base supports the cab frame rotatably about a cab rotational axis extending in the width direction. A cover is attached to the cab frame to cover a space provided above the upper support frame in the height direction when the cab frame is mounted on the vehicle body front portion. A first dust intrusion prevention mechanism is configured to overlap with a gap defined by the cab frame, the upper support frame, the first support base, and the cover when viewed in the width direction when the cab frame is mounted on the vehicle body front portion.

The utility model discloses a battery rack which comprises a main body frame, a battery supporting beam and a gear linkage mechanism, the battery supporting beam is arranged in the main body frame, the gear linkage mechanism is arranged in the main body frame and located below the battery supporting beam, and an avoiding hole is formed in the battery supporting beam. The gear linkage mechanism comprises an installation beam fixed in the main body frame, a gear pair rotationally connected to the installation beam, an elastic piece hinged to the installation beam and a limiting plate connected between the elastic piece and the gear pair, and one end of the limiting plate is arranged in the receding hole in a penetrating mode and protrudes out of an opening of the receding hole under the action of restoring force of the elastic piece. The utility model further discloses a battery cluster with the battery rack.

The utility model relates to the field of coal and ore sampling accessory devices, and discloses a novel electric spiral sampling head which comprises a main body frame, a lifting driving assembly is arranged at the top end of the outer wall of the main body frame, a lifting chain is arranged on an output shaft of the lifting driving assembly, and a spiral sampling cylinder is connected to the inner wall of the main body frame in a sliding mode. A tie bar is fixedly connected to the bottom end of the outer wall of the joist, a lifting protective cover is fixedly connected to the bottom end of the outer wall of the tie bar, a lifting cloth curtain is fixedly connected to the outer wall of the top end of the spiral sampling cylinder, and a pressure sensor is fixedly connected to the outer wall of the left side of the spiral sampling cylinder. According to the utility model, the lifting shield and the lifting cloth curtain can ascend and descend along with the spiral sampling cylinder, the lifting shield stops after descending to the top of materials of a vehicle, material dust returning to a carriage in the sampling process can be blocked by the lifting shield, and the upper part of the material dust can be blocked by the lifting cloth curtain and the main body frame, so that dust dissipation is effectively inhibited.

The utility model relates to the technical field of coal mining equipment, in particular to a double-arm type roadway repairing machine which comprises a vehicle body frame and further comprises a caterpillar band walking system installed at the bottom of the vehicle body frame and used for achieving the whole vehicle walking function. The two sets of repairing arms are installed at the two ends of the vehicle body frame correspondingly, and quick changing devices are installed at the ends of the two sets of repairing arms; one end of the swing oil cylinder is installed on the vehicle body frame, and the other end of the swing oil cylinder is connected with the repairing arm and used for adjusting the repairing arm front and back in the walking direction of the crawler walking system. According to the utility model, the double repair arms are arranged, and different quick-change devices are arranged on the two sides of the double repair arms, so that two working modes can be completed without replacement.

A work machine includes: a body including: a body frame; a driver's seat at a central portion of the body; a power source at a back portion of the body; and a front-wheel unit disposed at a front portion of the body and extending in a left-right direction of the body, wherein the body has a forward portion provided with at least one first holder configured to hold a rope and / or allowing the rope to pass therethrough. The forward portion is provided with two or more first holders which are each usable as an independent holder or which are usable in conjunction with each other to allow a rope to pass through both holders.

A vehicle body structure includes a vehicle body frame member that is integrally molded by casting in a state where a right suspension tower portion and a left suspension tower portion are coupled by an intermediate portion. The vehicle body frame member includes a coupling member that extends in a left-right direction at a position away from the intermediate portion by a predetermined distance in a vehicle front-rear direction or an up-down direction and couples a right side and a left side of the vehicle body frame member.

The invention discloses a sealed transport vehicle which comprises a sealing main body, a sealing part, a sealing part, a sealing part, a sealing part and a driving part. The sealing main body is of a hexahedron structure; a sealing strip is arranged on the inner side of the sealing main body; the drawer mechanism comprises a plurality of drawer pieces installed in the sealing body in a sliding mode, and supporting structures used for bearing products are arranged in the drawer pieces; the door body is hinged to one side of the main body frame, and after being closed, the door body is matched with the sealing main body to form a transportation sealing cavity; the buffer mechanism is arranged at the bottom of the sealing main body and comprises a spring damping assembly; and the anti-static structure is used for guiding out static electricity generated by the transport vehicle. According to the sealed transport vehicle, the drawer can be used for storing and reliably supporting products, it is guaranteed that the products do not shake greatly, the phenomenon that the products fall off and are damaged is avoided, meanwhile, good sealing performance and good anti-static capacity can be guaranteed, the products are convenient to take and place, and product damage caused in the product taking and placing process is avoided.

To provide an electric vehicle that can provide vehicle traveling performance, balance in loading capability of stably loading cargo, durability of a load-carrying platform, and light-weight of the load-carrying platform in a compatible manner.SOLUTION: An electric vehicle 1 includes: a vehicle body frame including a pair of left and right main frames 31 extending in the front-rear direction of the electric vehicle 1; a pair of left and right driven wheels 5 arranged to sandwich the pair of main frames 31 from both sides; a pair of left and right drive wheels 6 arranged to sandwich the pair of main frames 31 from both sides; and a load-carrying platform frame 101 detachably mounted on the main frames 31. The load-carrying platform frame 101 includes: a pair of left and right load-carrying platform main frames 111 that overlap at least partially with the pair of main frames 31 in a plan view of the electric vehicle 1 and are supported by the main frames 31; and an outer frame 112 that is supported by the pair of load-carrying platform main frames 111 to define an outer edge of the load-carrying platform frame 101.SELECTED DRAWING: Figure 1

The invention relates to the technical field of elevator equipment, and discloses a sightseeing elevator which comprises an elevator car and two rails, the two rails are arranged on the two sides of the elevator car correspondingly, guide plates are fixedly connected to the two sides of the elevator car correspondingly, and the two rails extend into the two guide plates correspondingly and are matched with the guide plates; the top of the lift car is fixedly connected with a top frame. Through the design of the anti-falling mechanism, once falling occurs, a friction plate can be controlled to move upwards to be attached to the outer side of a rotating shaft for friction speed reduction by controlling a main body frame to overturn, and meanwhile, a brake plate is controlled to be attached to a track for friction for further matched speed reduction; when braking is carried out, pushing support is provided for the friction plate and the braking vane through the elastic acting force of the first spring, the reed and the second spring, so that the situation that internal passengers are scared and uncomfortable in body due to sudden stop caused by direct maximum-force braking is avoided.

The embodiment of the utility model provides a vehicle, a vehicle body frame of the vehicle comprises a fiber composite board and a reinforcing structure, the fiber composite board is partially sunken to form a sunken cavity, the sunken cavity comprises a plurality of first concave cavities, one side of each first concave cavity along a first direction is open, and at least two first concave cavities extend along a second direction and are arranged along a third direction; the first direction, the second direction and the third direction intersect with one another; the reinforcing structure is connected with the fiber composite board, and at least part of the reinforcing structure is located in the first cavity. According to the vehicle, through cooperation of the inner wall of the concave cavity and the reinforcing structure, the overall rigidity and strength of the vehicle body frame can be improved, deformation of the vehicle body frame in the using process of the vehicle is restrained, the adverse effect on the vehicle function due to deformation of the vehicle body frame is reduced, and the service life of the vehicle is prolonged. And the bearing capacity of the vehicle body frame is also improved.

The invention relates to a tire bead ring producing, machining and straightening device and method, and belongs to the technical field of tire producing and machining equipment.The tire bead ring producing, machining and straightening device comprises a main body rack, and a guide rail and a mounting base plane are arranged on the main body rack; the pretreatment module is installed at the feeding end of the main body rack, and the pretreatment module comprises a clamping device used for clamping a steel wire ring and a feeding roller driven by a servo motor; the straightening module is installed on the installation base face of the main body rack and located on the downstream of the pretreatment module, and the straightening module comprises a primary straightening wheel set and a dynamic compensation straightening wheel; the detection module comprises a first visual detection station and a second visual detection station which are fixed to the main body rack, the first visual detection station is located between the preprocessing module and the straightening module, and the second visual detection station is located behind the straightening module.

A utility vehicle 100 includes a vehicle body frame 1, pillars 2 attached to the vehicle body frame 1 and extending in an up-down direction, a roof 3 supported by the pillars 2, and a harness 4 connected to an electric component 5. The pillars 2 include a hollow tubular front pillar 21. The front pillar 21 has an upper end hole 25 opening at an upper end 21a, a lower end hole 26 opening at a lower end 21b, a first hole 27 opening in a side wall 21c, and a second hole 28 opening in the side wall 21c and positioned lower than the first hole 27. The roof 3 has a drain hole 33. The drain hole 33 faces and communicates with the upper end hole 25. The harness 4 is inserted into the front pillar 21 through the first hole 27 and the second hole 28.

The utility model discloses a wafer state detection system of a wafer box opener, which comprises a first detection mechanism used for detecting the number of wafers in a wafer box, and the first detection mechanism is obliquely arranged at the front end and the rear end of the bottom of a lifting mechanism; the second detection mechanism is used for detecting whether the wafer in the wafer box is obliquely placed or not, and the second detection mechanism is arranged at the left end and the right end of the bottom of the lifting mechanism and located at the end close to the main body frame; and the third detection mechanism is used for detecting whether the wafer in the wafer box protrudes, and the third detection mechanism is arranged at the left end and the right end of the bottom of the lifting mechanism and located at the end away from the main body frame. The two groups of second detection mechanisms and the two groups of third detection mechanisms respectively correspond to the detection sizes of the 12-inch wafer box and the 8-inch wafer box, the first detection mechanism is obliquely arranged, the detection route of the first detection mechanism is not limited by the sizes of the wafer boxes, and the wafer state detection compatible with the 12-inch wafer box and the 8-inch wafer box at the same time is realized.

The invention belongs to the field of underwater robots, and particularly discloses a multi-mode deep sea autonomous operation deformable underwater robot which comprises a main body frame used for connecting and installing other components. The buoyancy material shell comprises a left side buoyancy material, a right side buoyancy material and a middle movable buoyancy material; the middle movable buoyancy material is mounted on the jacking device and ascends and descends through the jacking device; the gravity center adjusting device is used for adjusting the overall gravity center of the underwater robot; the propelling device is used for driving the underwater robot to move and sail in the underwater environment; the chassis is fixedly connected to the bottom of the main body frame and serves as a mounting foundation of the operation mechanical arm and the bottom-sitting mechanical leg; the operation mechanical arm is used for executing underwater operation tasks; and the bottom-sitting mechanical legs are used for providing support during underwater bottom-sitting. According to the overall design innovation scheme, the underwater robot changes the working state by changing the self-configuration, and the underwater robot can adapt to multi-working-condition operation tasks such as floating, bottom sitting and hovering.

The invention discloses a high-altitude wind power generation system which comprises a main air bag extending in the front-back direction, and the peripheral face of the main air bag is a rotary face; the ring wing sleeves the radial outer side of the main air bag and is spaced from the main air bag, and a duct space is formed between the inner wall of the ring wing and the outer wall of the main air bag; the first supporting frame and the second supporting frame are sequentially arranged on the radial outer side of the main air bag in a sleeving mode in the axial direction of the main air bag; the wind power assembly is mounted on the first supporting frame; the first supporting frame comprises a plurality of supporting units, an annular supporting frame with an inner ring and an outer ring is defined by the multiple supporting units, the annular supporting frame comprises ducts formed between the adjacent supporting units, and the wind power assembly is installed in the ducts; the second supporting frame is of an annular grid truss structure and comprises a main body frame and truss rod pieces assembled in the main body frame through truss nodes, and the truss rod pieces and the truss nodes are modularly expanded to form the grid truss structure.

A fixing structure includes an insertion hole, a slit, a first stopper, and a second stopper. The insertion hole is provided in a vehicle body frame. A pipe nut main body is inserted through the insertion hole so as to be rotatable. The slit is provided in the vehicle body frame and extends from the insertion hole. The first stopper is provided at a base end of the pipe nut main body and abuts on an outer surface of the vehicle body frame to restrict movement of the pipe nut main body in a longitudinal direction. The second stopper extends from a side surface of the pipe nut main body, passes through the slit, and is disposed inside the vehicle body frame. The second stopper is joined to an inner surface of the vehicle body frame at a position rotated around the central axis from the slit.

The invention discloses a barrel type unmanned aerial vehicle recycling device and a recycling method thereof. The barrel type unmanned aerial vehicle recycling device comprises a main body frame and a barrel. The top of the barrel is wider than the bottom of the barrel, the bottom wall of the top of the barrel is connected with the main frame, and the bottom of the barrel extends into the main frame; a buffer net is arranged at the bottom of the barrel; and a positioning module is arranged at the bottom of the main body frame and is in communication connection with the cylindrical unmanned aerial vehicle. Landing recovery is effectively performed on the barrel type unmanned aerial vehicle, it is guaranteed that a long and thin vehicle body at the bottom of the barrel type unmanned aerial vehicle penetrates through the barrel, it can also be guaranteed that the bottoms of rotor wings of the barrel type unmanned aerial vehicle can stably fall on the upper portion of the barrel, recovery accuracy and success rate are improved, and the landing recovery problem of the barrel type unmanned aerial vehicle without the undercarriage is solved; the repeated utilization rate of the barrel type unmanned aerial vehicle is increased, the service life of the barrel type unmanned aerial vehicle is prolonged, the maintenance frequency and the part replacement cost are reduced, and safe recycling of the barrel type unmanned aerial vehicle in various environments or severe weather is met.

The present invention relates to the technical field of welding systems, and provides an induction heating welding system for the production of sapphire picks, which forms a coupled welding of hot melting and trimming, realizes welding connection while integrating structural strengthening, further improves the structural strength between the pick head and the pick handle, forms a surface supplement and strengthening for the welding area, improves the structural characteristics of the connection between the pick head and the pick handle, makes the connection reliability between the pick head and the pick handle better, has a higher service life, can form a continuous processing operation, has a higher production efficiency, and has better practicability. It includes a mutually cooperating pick handle and a pick head, and also includes a main body frame and a welding treatment device. An insertion hole is provided on the pick handle, and a plurality of arc-shaped inner convex strips are arranged in the insertion hole. A plurality of arc-shaped outer convex strips are fixedly connected to the outside of the pick head, and the plurality of arc-shaped inner convex strips are respectively matched with the plurality of arc-shaped outer convex strips. A spiral filling wire is sleeved outside the pick head, and an electric rotary workbench is installed on the main body frame.

The invention relates to the field of agricultural machinery, and discloses a modular radix astragali harvester with a variable-spacing screen, the device comprises a main body frame, the outer wall of the main body frame is provided with a vibration mechanism, the two sides of the outer wall of the vibration mechanism are both provided with baffles, the inner walls of the baffles are fixedly connected with a separation net, and the separation net is fixedly connected with the separation mechanism. The outer wall of the vibration mechanism is fixedly connected with a connecting block, the outer wall of the connecting block is fixedly connected with a front shovel, and the outer wall of the main body frame is fixedly connected with a connecting frame. The vibration mechanism comprises a first motor, the outer wall of the first motor is fixedly connected to the outer wall of the main body frame, and the output end of the first motor is connected with a first belt wheel. Two vibration modes are provided, one mode can drive a baffle, a separation net and a front shovel to vibrate, astragalus membranaceus and soil adhered to the astragalus membranaceus can be separated while the driving resistance is reduced and the soil crushing efficiency is optimized, and the other mode can adjust the vibration amplitude by rotating a rotating handle, so that the adaptability is improved.

The vehicle body frame structure for a vehicle includes a side sill extending in a vehicle front-rear direction and a reinforcing member in a hollow section of the side sill. The reinforcing member is formed such that plural closed cross-sectional cells, each of which has an axis in a vehicle width direction, continue in the vehicle front-rear direction. The plural closed cross-sectional cells each have an n-sided polygon (n: an even number of 4 or greater) closed cross section such that the closed cross-sectional cells adjacent in the vehicle front-rear direction share a first cell wall. A side length of the first cell wall in each cell is longer than a side length of at least one cell wall of cell walls other than the first cell wall of the cell.