592results about How to "Ensure structural stability" patented technology

The invention provides a hollow-core-to-hollow or solid-core-to-hollow optical fiber connection jumper wire and a preparation method thereof. The jumper wire comprises a transmission fiber and connectors connected to the two ends of the transmission fiber. The transmission fiber is a hollow-core optical fiber, the connector comprises an optical fiber fixing device and an integrated welding structure fixed in the optical fiber fixing device, the integrated welding structure comprises a transmission fiber, a coating film and a transition fiber which are fixedly connected in sequence, the coating film performs anti-reflection on a set wavelength, the transition fiber is a solid-core optical fiber, and the outer side end of the transition fiber serves as the output end of the connector; and the output ends of different connectors are oppositely arranged so as to realize transmission connection between different jumpers. Pluggable, stable and reliable connection between the hollow-core optical fibers or between the hollow-core optical fibers and the solid-core optical fibers is achieved.

The utility model relates to the technical field of automobile connector fixing, and discloses an automobile connector fixing structure which comprises a connecting mechanism, a fixing mechanism and a main body mechanism, the connecting mechanism is located at the top end of the fixing mechanism, the fixing mechanism is located at the top end of the main body mechanism, and the connecting mechanism comprises a first connector. A second connector is connected to the inner wall of the first connector in a sleeved mode, a clamping groove is formed in the outer wall of the second connector, a clamping block is connected to the inner wall of the clamping groove in a clamped mode, and a spring is fixedly connected to the back face of the clamping block. The spring is arranged between the first connector and the clamping block, so that the clamping block can be controlled to contract by extruding the spring, and when the clamping block enters the bottom of the clamping groove, the spring provides support for the clamping block, so that the clamping block can be tightly matched with the clamping groove, and the first connector and the second connector can be stably connected; the connector is prevented from accidentally falling off, and the structural stability of the automobile connector at the connecting part is ensured.

The invention discloses a segmented combined type worm grinding wheel based on spiral surface structuring and a laser finishing method, and belongs to the technical field of precise gear grinding. The working surface of the inner side of a spiral tooth groove of the worm grinding wheel at least comprises a section of structured area and a section of unstructured area in the axial direction; the structured area is provided with a crescent groove used for forming a grinding fluid storage and abrasive dust discharge channel in the grinding process. And the unstructured area keeps a continuous grinding surface and is used for finishing the surface of the machined workpiece in the structured area. According to the method, the laser processing head is controlled through multi-axis linkage to accurately describe an arc-shaped processing track in a spiral expansion coordinate system, the morphology consistency and the space precision of grooves are guaranteed, and the manufactured worm grinding wheel has good cooling, chip removal and accurate grinding performance and is suitable for high-efficiency and high-precision gear manufacturing.

The utility model discloses an adjustable television connection hanger belongs to television installation equipment technical field, including wallboard, adjusting arm, hanging board, connecting plate, crosspiece and hook adapter, the wallboard is connected with the hanging board through adjusting arm, the connecting plate is fixed in one side of hanging board, the crosspiece is two, two crosspiece symmetry is installed in the connecting plate, the hook adapter is two, and is installed with the inner hook on the hook adapter, the hook adapter cooperation inner hook is installed on the crosspiece, be equipped with the pitch adjusting bolt on the inner hook, two extension rods are movably connected in the crosspiece, the bottom of crosspiece is fixed with a plurality of cable fixer. This adjustable television connection hanger not only reduces the transportation cost, guarantees the stability after television installation simultaneously, and is suitable for different size television, and can effectively fix cable.

The utility model relates to a kind of lithium iron phosphate starting power supply, and cell group includes multiple full tab low temperature lithium iron phosphate battery, and multiple full tab low temperature lithium iron phosphate battery is electrically connected battery management system after mutual series connection or parallel combination;PI heating film is attached to the outer surface of cell group, and PI heating film is closely attached with cell group by heat-conducting silica gel;PI heating film is electrically connected battery management system, for heating cell group under the control of battery management system;GPS positioning module is integrated in the outside of cell group, for obtaining the position information of lithium iron phosphate starting power supply and uploading to remote processing equipment;Cell group, battery management system, PI heating film and GPS positioning module are all set in insulating box body.The utility model reduces internal resistance by full tab low temperature battery structure, can still stable output current in low temperature environment, solves the problem of insufficient low temperature discharge capacity of traditional battery.

The invention discloses a supporting device and supporting combination equipment, and belongs to the technical field of petrochemical equipment, and the supporting device comprises a base component serving as an equipment connection foundation; the pre-embedded plate is used for being embedded in the ground of an equipment area; the sliding assembly is arranged between the pre-embedded plate and the foundation component, and the sliding assembly is connected with the foundation component or the pre-embedded plate; the limiting pieces are arranged on the periphery of the base component, and gaps are formed between the limiting pieces and the base component; the base component can slide relative to the embedded plate through the sliding assembly, and the multiple limiting pieces limit the periphery of the base component when the base component slides. The position of the equipment can be adjusted to a certain degree, additional force and torque are prevented from being generated between the equipment and a pipeline and between the equipment, the equipment is suitable for the condition of thermal expansion and cold contraction, and then the structural stability of the equipment is ensured.

This invention provides an ink mixing device for a packaging box printing machine, relating to the field of ink processing technology. The ink mixing device for the packaging box printing machine includes a mixing tank and a bottom tank; it also includes a drive motor, the output end of which is connected to a pressing mechanism and a reciprocating mechanism. The pressing end of the pressing mechanism is connected to a piston, which moves within a metering mechanism. An adjustment mechanism for metering is also provided on the outside of the metering mechanism. Inside the mixing tank, a stirring assembly and a scraper are provided for ink mixing. The stirring assembly and scraper are driven by the drive motor. The reciprocating end of the reciprocating mechanism is connected to a scraper ring for scraping the inner wall of the mixing tank. This invention achieves coordinated operation of metered ink delivery, efficient mixing, and automatic tank wall cleaning by simultaneously driving the pressing mechanism, stirring assembly, and reciprocating mechanism with a single drive motor, effectively reducing equipment energy consumption and structural complexity.

The utility model discloses a kind of snow tire tread pattern processing devices, it is related to tire production technical field.The utility model includes support component, the outer surface of support component is inserted with several pattern components, and support component support end is provided with several elastic fixing components corresponding pattern component, and the outer surface of pattern component is equipped with shielding sealing component.The utility model is pulled to the fixed end of elastic fixing component, so that fixed end no longer limits the insertion end in the inside of support component, then the whole pattern component is moved, so that insertion end is moved from the inside of support component under the driving of pattern component;Above all, when the pattern component set on the outside of support component is disassembled and replaced, it only needs to be pulled to elastic fixing component and pattern component in turn, effectively avoids the multiple work steps alignment and repeated positioning problem of traditional bolt fastening mode, significantly improves maintenance efficiency and ensures the cooperation precision between modules.

The utility model relates to ton bag packing fixing field, concretely relates to quartz sand ton bag packing fixing device, its technical scheme is: including support subassembly, fixed component and hook, the fixed component is connected between adjacent support subassembly, the support subassembly upper end is connected with the hook, the support subassembly includes fixed stand and the lifting groove of setting up in the fixed stand upper end middle, the lifting groove inboard is penetrated with the lifting plate, the fixed stand upper end one side is connected with the limiting component, the utility model has the beneficial effect that: the utility model constructs an adjustable rectangular frame structure through the collaborative design of support subassembly, fixed component and hook, can effectively surround and support ton bag, prevents its from happening inclination, collapse or displacement because of unstable center of gravity or external force interference in the loading process.

The utility model relates to the technical field of positioning electric cylinders, in particular to a miniature electric cylinder with a positioning function and suitable for high and low temperatures, which comprises a machine body, a speed reducer is mounted on the inner wall of a cavity, a driving gear is fixedly connected to the outer wall of the speed reducer, a driven gear is meshed with the outer wall of the driving gear, and a bearing is fixedly connected to the outer wall of the driven gear. The outer wall of the bearing is fixedly connected with a main shaft, the top end of the machine body is fixedly provided with a limiting switch, through the limiting switch at the top end of the machine body, the electric cylinder is provided with a positive limiting switch and a negative limiting switch, the movement range of the electric cylinder can be accurately controlled under the DC5V driving voltage, the rated thrust of the electric cylinder reaches 50N, and the thrust requirement in a common working scene can be met; the rated pushing speed of the electric cylinder is stable 4 mm / s, the stability of linear motion is ensured, the effective stroke is set to be 20 mm, displacement control is more accurate, in addition, the electric cylinder can bear radial force as high as 20 N, and therefore the structural stability and reliability in the running process are ensured.

The application provides an adjusting system and a seat. The adjusting system comprises a base frame, a seat cushion frame connected with a seat pan, a rear adjusting part connected with the rear side of the seat cushion frame, a transmission element connected with the seat cushion frame, a front supporting part connected with the front side of the seat cushion frame, and the adjusting system has a first state and a second state. In the first state, the front supporting part provides the front side of the seat cushion frame with a first height, and the rear adjusting part provides the rear side of the seat cushion frame with a second height. In the second state, the height of the rear side of the seat cushion frame is reduced from the second height to a minimum second height relative to the first state.

This utility model discloses a well-formed packaging box, relating to the field of packaging structure technology. It includes a main body area and a lid area for sealing. At least one lid area has an adhesive portion, which includes a first adhesive area, a cutout area, and a second adhesive area. After the packaging box is assembled, the multiple lids in the lid area form a structure of at least three layers, sequentially including an inner lid, a middle lid, and an outer lid from the inside to the outside of the box. By providing a first adhesive area on the inner lid, a cutout area on the middle lid corresponding to the first adhesive area, and a second adhesive area on the outer lid near the middle lid, the outer lid can simultaneously adhere to the inner lid through the cutout area when it is glued to the middle lid. This increases the number of lids that can be glued and fixed, avoids some lids from bulging or warping, and ensures the overall aesthetics and structural stability of the packaging box.

The utility model relates to the technical field of steel balls, and discloses a multi-steel-ball separating and feeding mechanism which comprises a separating box, a vibrating disc is arranged on the right side of the top of the outer wall of the separating box, a fixing box is fixedly connected to the bottom of the vibrating disc, a vibrating machine is fixedly connected to the inner wall of the fixing box, and a sliding rail is fixedly connected to the output end of the vibrating disc. A small round hole is formed in the middle of the sliding rail, a temporary storage box is fixedly connected to the bottom of the sliding rail, a direction hole is formed in the left side of the inner wall of the temporary storage box, the right side of the temporary storage box communicates with the top of the separation box, and temporary storage boxes are fixedly connected to the left side and the right side of the top of the inner wall of the separation box correspondingly; and connecting pipes are fixedly connected to the left and right sides of the bottom of the inner wall of the separation box. According to the steel ball sorting device, the steel balls with moderate diameters and the steel balls with overlarge diameters are respectively guided to different paths through the small round holes, so that the steel balls finally fall into the corresponding temporary storage boxes in the separation box, and the preliminary sorting of the steel balls is realized.

The invention relates to the technical field of thermal control coatings, in particular to a liquid metal commercial aerospace thermal control coating adaptive to extreme temperature difference, which comprises a substrate binding layer and a thermal control functional layer, the thermal control functional layer is arranged on the side wall of the substrate binding layer, a thermal circulation pipe is arranged in the thermal control functional layer, and a composite heat conduction layer is arranged on the side wall of the thermal control functional layer. A limiting stabilizing layer is arranged on the side wall of the composite heat-conducting layer. By arranging the multi-layer composite structure and the liquid metal, efficient heat regulation and control in an extreme temperature difference environment are achieved, the substrate combination layer is made of a radiation-resistant material, it is ensured that the structure stability is kept in a strong radiation environment, the liquid metal material in the heat control function layer and a cross circulation plate form a three-dimensional heat conduction network through a disc-shaped heat control circulation pipe, and the heat conduction efficiency is improved. And by arranging the separation cavity, atomic oxygen erosion is effectively blocked, and the inorganic thermal control coating layer of the separation cavity can adjust the surface thermal radiation characteristic.

The invention relates to the technical field of nuclear facility pipeline heating. The invention provides a pipeline heating device and an in-reactor test facility. The pipeline heating device comprises a magnetic conduction layer, a heat conduction layer, a heat preservation layer and an electromagnetic induction coil, the magnetic conduction layer is made of a magnetic alloy material, and the magnetic conduction layer is enclosed and internally forms a heating area used for containing a pipeline; the heat conduction layer is located on the side, facing the heating area, of the magnetic conduction layer and used for transmitting heat of the magnetic conduction layer to the pipeline. The heat preservation layer wraps the side, away from the heating area, of the magnetic conduction layer. The electromagnetic induction coil is wound around the side, away from the heating area, of the heat preservation layer. The magnetic conductive layer made of the magnetic alloy material serves as a main absorption and conversion carrier of magnetic field energy, the eddy current effect can be remarkably enhanced, the problem that the heating efficiency is insufficient due to low magnetic conductivity of the austenitic stainless steel pipeline is solved, and the heating efficiency is greatly improved. The arrangement of the magnetic conductive layer can fundamentally avoid material microscopic damage caused by direct action of a magnetic field, and the safety is higher.

The utility model relates to valve machining technical field, especially a new type valve cover. Including base, annular pipe, reinforcing surface, fixed ring and annular groove, the annular groove sets up in the base body center position, two fixed ring respectively set up on the base body, and two fixed ring respectively are close to base body both ends setting, the annular pipe sets up in the base upward operation surface. Including raw material detection, heating and material preparation, making embryo and forging, intermediate detection, trimming and shaping, cooling and cutting, welding and processing, final detection, cleaning and polishing, equipment maintenance, the utility model has the beneficial effect that: through the close connection of annular pipe and annular groove, the sealing performance of valve cover is promoted, effectively prevents medium leakage, through strict raw material detection and each link quality detection, can effectively improve the quality of valve cover, enhances its sealing property and pressure resistance, reduces the occurrence of product failure and leakage problem.

This invention discloses a cold-resistant, low-smoke, airtight, explosion-proof control cable and its manufacturing method, relating to the field of control cable technology. It includes a central transmission cable with an outer protective rubber layer. The outer protective rubber layer is covered by an inner anti-slip silicone ring, which is further covered by an inner rubber expansion layer. A side-guided inner tube is located outside the inner rubber expansion layer. This invention utilizes a flexible expansion airbag and an adjustable isolation box with a linked internal and external pressure-stabilizing structure to maintain the internal air pressure of the control cable within a suitable range during use. This allows for rapid sealing and protection of the damaged area after external damage, preventing internal damage or electrical sparks caused by external impurities after the outer sheath is damaged. This effectively improves the explosion-proof capability and safety of the control cable.

This invention provides a surface acoustic wave (SAW) filter, comprising a piezoelectric layer and interdigitated electrodes. The interdigitated electrodes are disposed on the piezoelectric layer and include at least a first metal layer and a second metal layer stacked together. The first metal layer is made of platinum or an alloy with platinum as the main component, and the second metal layer is made of aluminum or an alloy with aluminum as the main component. By setting the material of the second metal layer to aluminum or an alloy with aluminum as the main component, the uniformity of metal coverage of the electrode structure can be effectively improved, avoiding excessive local resistance or structural defects caused by poor coverage. Setting the material of the first metal layer to platinum or an alloy with platinum as the main component provides reliable support for the second metal layer, reducing the risk of deformation or corrosion of the aluminum layer in subsequent processes. By using a stacked structure of two complementary materials for the interdigitated electrodes, both structural miniaturization and improved overall electrical performance and structural reliability of the interdigitated electrodes are achieved.

This utility model discloses an auxiliary device for hoisting large bars, comprising multiple interconnected bases. A column is fixedly connected to one side of the top of each base, and a support frame is movably installed on the top of the base. Diagonal braces are fixedly connected to both sides of the support frame. Multiple elastic telescopic rods are installed between the support frame and the base. An elastic support element is installed inside the column, located below the diagonal braces. A plug-in guide frame is fixedly connected to the elastic support element. A wedge-shaped slot is provided on the other side of the top of the base, inclined against the plug-in guide frame. This utility model, through the flexible connection of multiple devices, adapts to the batch hoisting and placement of large quantities of bars. The cooperation of the movably installed support frame, diagonal braces, and elastic support element inside the column forms a natural positioning structure when supporting the bars, achieving automatic centering using the weight of the bars themselves. The support frame and elastic support element together constitute a multi-dimensional buffer system.

The utility model belongs to the technical field of automobile crane, especially a kind of frame type lifting appliance for automobile crane, including frame body and inclined strut beam, the frame body is annular structure, the frame body includes crossbeam and stringer, the end of inclined strut beam is set on the crossbeam and stringer junction of frame body, and it is detachably connected between inclined strut beam, crossbeam and stringer;The end of crossbeam is equipped with the insertion slot, and the both ends of inclined strut beam are equipped with the insertion block matched with insertion slot;Insertion piece, upper lifting lug and lower lifting lug are equipped on stringer.The frame type lifting appliance for automobile crane has the advantages of easy assembly and use, and good structural stability and high structural strength. By using inclined strut beam as the inner support of frame body, the overall structural stability and structural strength of frame body can be improved, and the structural stability of the connection between stringer and crossbeam can also be improved, ensuring the structural strength of the connection between stringer and crossbeam.

The invention relates to the technical field of deep sea resource development, in particular to a magnetic type deep sea ore collecting device which comprises a rigid pressure-resistant main frame, mechanical legs, mechanical arms, an ore processing module, a communication module, a pushing module and a positioning module. A sealed pressure-resistant cabin is arranged in the rigid pressure-resistant main frame; the mechanical legs are symmetrically installed on the two sides of the rigid pressure-resistant main frame. The mechanical arm is installed on the front end face of the rigid pressure-resistant main frame. The ore processing module is arranged along the center line of the rigid pressure-resistant main frame; the communication module is connected with the water surface support mother ship through an armored cable; the pushing module comprises a plurality of horizontal propellers and a plurality of vertical propellers; the positioning module is installed on the upper side face of the rigid pressure-resistant main frame. The device provided by the invention has the advantages of good terrain adaptability, high collection integrity, small disturbance and reliable operation, and is suitable for selective collection operation of resources in a deep sea complex environment.

This utility model discloses a support system for an integrated sloping roof and courtyard, and a residential photovoltaic power station. The system includes a roof support and a courtyard support. The roof support comprises several horizontally spaced inclined beams on a first sloping roof, several horizontally spaced back braces on a second sloping roof, and short column support assemblies installed on both the first and second sloping roofs to support the inclined beams and back braces. The back braces are correspondingly positioned to the inclined beams, with their upward-sloping ends connected to the beams. The inclined beams extend downwards along the first sloping roof to above the courtyard. The courtyard support includes columns installed within the courtyard, with their upper ends connected to the inclined beams. A reinforcement structure is provided between the columns and the inclined beams, and / or between the columns themselves. The roof support and courtyard support can be designed as a single unit, forming a unified slope above the first sloping roof and courtyard for installing photovoltaic modules, increasing the number of photovoltaic modules installed and expanding the power generation area.

The application discloses a damping gimbal mounting device for unmanned aerial vehicle surveying, and belongs to the field of unmanned aerial vehicle equipment. The gimbal mounting device comprises a damping support, a gimbal main body connected with the damping support, and a connecting mechanism for fixing and mounting the gimbal main body on the damping support. The connecting mechanism comprises a fixed sleeve penetrating through the bottom of the damping support and fixedly connected with the top of the damping support, a plug sleeve inserted into the bottom of the fixed sleeve and fixedly connected with the gimbal main body, a first arc-shaped plate fixedly connected with the upper end side of the plug sleeve, and an arc-shaped groove provided in the fixed sleeve and adapted to the first arc-shaped plate. The convex surface of the first arc-shaped plate is outwardly arranged. Through the design of the elastic component, the first arc-shaped plate can be provided with continuous outward force, so that the convex surface of the first arc-shaped plate is always closely attached to the inner wall of the arc-shaped groove, the first arc-shaped plate is prevented from being separated from the arc-shaped groove due to the flight vibration of the unmanned aerial vehicle, and the long-term stability of the connecting mechanism is ensured.

The utility model relates to abrasive disc technical field discloses a kind of high-strength brown corundum wear-resistant resin abrasive disc, including wheel core, the transition layer is equipped outside wheel core, the abrasive ring is equipped outside transition layer, and the transition layer and abrasive ring are detachably connected by bolt;Several convex teeth are distributed in the surface one side of transition layer, several grooves are opened in abrasive ring inner wall, and several convex teeth are embedded in the inner wall of several grooves;The utility model is connected by the circumferential limit of convex tooth and groove, annular limiting plate and annular groove and the axial restriction of mounting block and mounting groove, plus the fastening effect of bolt, multiple structure cooperation makes transition layer and abrasive ring connect exceptionally stable, when abrasive ring wears, it can be replaced by only disassembling bolt, wheel core and transition layer can be reused, without integral replacement abrasive disc, substantially reduce the equipment use cost, reduce resource waste, and it is convenient to replace abrasive ring of different granularity according to processing requirement.

The application relates to the technical field of lawn mowers, in particular to a cutterhead assembly and a lawn mower. The cutterhead of the cutterhead assembly is provided with a driving part, an annular supporting part and an annular mounting part from inside to outside, the supporting part is connected with the driving part in an inner ring and connected with the mounting part in an outer ring; the driving part is connected with a driving unit, the outer ring of the mounting part is provided with cutting blades, the supporting part is provided with one or more through holes, and when the cutterhead rotates, the air flow velocity on the side of the supporting part close to the ground is smaller than the air flow velocity on the side of the supporting part far from the ground. When the cutterhead rotates, the air flow velocity below is higher, an upper-lower pressure difference is formed according to the Bernoulli principle, a stable air flow from top to bottom is constructed, the upward movement of grass stems is blocked, and the broken grass stems entering the upper part of the cutterhead can be quickly discharged to the ground in cooperation with the through holes. The application effectively solves the problem of grass stem winding around the motor output end in the long-term use of the cutterhead of the lawn mower.

This utility model discloses a transport box for laboratory mice with an anti-collision and buffer structure, including an outer anti-collision box and an inner placement box. The placement box holds the laboratory mice, and the outer wall of the placement box is provided with multiple buffer blocks, which are placed between the outer anti-collision box and the placement box. Both the outer anti-collision box and the top of the placement box are provided with door opening and closing components. The top and bottom of the placement box are provided with upper and lower buffer components, and the opposite side wall is provided with side buffer components. The upper and lower buffer components and the side buffer components are all set in conjunction with the buffer blocks. This utility model provides basic anti-collision protection through the outer anti-collision box, and with the buffer blocks on the outer wall of the placement box, it can initially mitigate the impact of external collisions. The upper and lower buffer components and the side buffer components work together to effectively absorb the vertical and lateral vibrations and bumps during transportation, reducing the stress response or physical injury to the laboratory mice caused by collisions and bumps.

The utility model relates to paper strip technology field, concretely is a kind of paper strip reversing mechanism, including strip selector and reversing mechanism, and one end of strip selector is provided with reversing mechanism, and reversing mechanism includes reversing plate, reversing shaft, reversing wheel, jackscrew and internal hexagonal cylindrical head screw, and reversing plate is located the top end of reversing mechanism;The utility model is through three reversing wheel cover and corresponding installation reversing wheel one and reversing wheel two, respectively set up positive face and reverse paper strip slot structure such as falling strip position, when paper strip is selected and identified after being selected by strip selector, reversing wheel can accurately rotate to corresponding position, and when positive strip, paper strip can be quickly pushed into next process by following trend;When reverse strip, paper strip can be made to fall into reverse paper strip slot and turn over smoothly, cooperate with the pushing edge of reversing wheel two, ensure that paper strip completely slides down and enters next process, reduce the situation of jam, and then improve paper strip processing efficiency.

The utility model discloses a pole plate and an electrolytic bath, and relates to the technical field of electrolysis, the pole plate comprises a plate body, a pole frame and an outer frame, the pole frame is arranged on the peripheral side of the plate body, the outer frame is arranged on the periphery of the pole frame in a surrounding mode and fixed to at least one of the plate body and the pole frame, and the outer frame is arranged on the periphery of the plate body. And the compressive strength of the outer frame is higher than that of the pole frame. According to the technical scheme, the structural stability of the polar plate is improved, and the structural stability of the electrolytic cell is guaranteed.

The application discloses a double-glass module frameless laminating device and a photovoltaic module laminating equipment. The device comprises a rod and a supporting member extending along a first direction, the rod and the supporting member are oppositely arranged along a second direction, and a side surface and a bottom surface edge of the rod are provided with a clearance groove penetrating along the first direction. The clearance groove has a bottom opening, a side opening and two end opening. The supporting member comprises a mounting portion and a plurality of connecting portions, the mounting portion is provided with a reinforcing member, the bottom of the rod is provided with a mounting groove connected with the connecting portions, and a partition rod can also be arranged. The long side of the flange of the laminating equipment is provided with a plurality of the devices. The device can effectively avoid the edge of the module, even if a slight deviation occurs when the module is fed, rigid contact between the device and the edge of the module can also be avoided, the damage rate of the module is obviously reduced, the structure is stable, and deformation is not prone to occurring during long-term use. The whole structure is simple, easy to process, manufacture and install and maintain, and is suitable for large-scale industrial application.

A battery pack according to the present application includes: a cell array structure having a plurality of battery cells; and a battery pack case having an accommodation space for accommodating the cell array structure and having a bottom plate provided below the cell array structure, wherein the cell array structure has a base member containing a foamed material, having a predetermined volume, and covering and supporting a lower portion of the cell array structure, and the base member is spaced apart from the bottom plate in at least a partial region to form an exhaust space.