98results about How to "Improve assembly stability" patented technology

This invention discloses an automatic dust collection and charging base for vacuum cleaners with a display screen. The display screen allows for real-time monitoring of the device's operation, enhancing visibility and facilitating timely component inspection and adjustment. This ensures efficient and stable operation and ease of use. The charging structure features a charging rack with a clamp and conical guide groove, improving positioning stability during charging. Designed linkages and micro-switches in the charging components prevent accidental contact with conductive plates, enhancing safety. The dust collection structure includes a bottom positioning structure with upper and lower positioning rings that engage and lock together, and an embedded exhaust filter with a pull rod, improving ease of assembly and disassembly. Compared to common dust collection and charging bases, this design achieves efficient dust collection, safe charging, and convenient assembly and maintenance.

The application provides a high-static-pressure differential pressure gauge convenient to assemble, and belongs to the field of differential pressure gauges, to solve the problem that impurities in the delivered liquid or gas cannot be conveniently filtered and collected, and comprises a gauge body and a connecting pipe, the connecting pipe is installed on the gauge body, a spring is fixedly connected in a rotating disc, the other end of the spring is fixedly connected with a limiting plate, and the limiting plate is fixedly connected with a clamping block. The application is provided with a treatment box; when the connecting pipe is used to deliver liquid or gas, the liquid or gas passes through the treatment box, the residual impurities can be filtered and collected through the internally-installed filter screen, and the adaptability of the gauge body is avoided from being affected by the impurities; when the filter screen needs to be cleaned, the rotating rod can be rotated to drive the first bevel gear to rotate, the first bevel gear can drive the threaded rod to rotate through the second bevel gear, the threaded rod drives the extrusion box to move inward through the moving plate, the extrusion box is separated from the positioning plate, and after being unobstructed, the extrusion box can be taken out for subsequent cleaning and use.

The utility model relates to the technical field of optical element assembly, and provides a servo control tool for high-precision installation of a super-large lens, which comprises a base, the top end of the base is fixedly connected with a lens seat support, the top end of the lens seat support is movably connected with a lens seat, the lens seat and the lens seat support are not limited in the horizontal direction, and the lens seat support is movably connected with the lens seat. A lens is installed in the lens base, and a servo actuator is fixedly installed in the middle of the top end of the base. According to the utility model, the descending speed of the lens is accurately controlled through the cooperation of the servo motor and the ball screw, the bearing capacity is stronger, the lens can be ensured not to collide with the lens seat due to too fast descending in the self-centering process, the surface of the lens is prevented from being damaged and deformed, and the screw nut on the ball screw can be ensured to run along a straight line through the cooperation of the linear guide rail and the guide slide block; and the assembly precision and stability are improved.

A method for manufacturing high-strength, hydrogen-embrittlement-resistant bolts based on microsphere shot peening, and the bolts themselves, are disclosed. The manufacturing method includes: S1, cold heading and thread rolling of alloy structural steel billets to obtain bolt forming parts; S2, surface cleaning of the bolt forming parts, followed by overall surface peening with microspheres driven by high-pressure air; after overall peening, targeted strengthening peening treatment is performed on stress concentration areas such as thread roots, undercut grooves, and flange transition corners to obtain reinforced bolt parts; S3, the reinforced bolt parts are cleaned, dried, and phosphated to obtain finished bolt parts. This design, through a "overall + targeted" composite microsphere shot peening strategy, introduces a uniform residual compressive stress field and a micron-level fine-grained plastic deformation layer on the bolt surface, forming a thicker strengthening layer in stress concentration areas, significantly improving the fatigue strength and delayed fracture resistance of high-strength bolts, while ensuring uniform surface roughness and stable assembly friction coefficient.

The utility model relates to the technical field of reaction kettles, and discloses a biopharmaceutical reaction kettle which comprises a reaction kettle body, lug seats are fixed on the outer side of the reaction kettle body, a blanking pipe is mounted at the bottom of the reaction kettle body, and supporting legs are fixed at the bottom of the reaction kettle body. Through the arrangement of the auxiliary cleaning mechanism, one end of the rotating frame pokes the moving rod to move back and forth, the anti-falling sliding plate drives the cast iron frame and the rubber column to move back and forth, the rubber column impacts the outer side of the discharging pipe back and forth, adhesion materials can be stripped in an auxiliary mode, and the situation that the purity of the next batch is affected due to residue degradation is reduced; by arranging the stabilizing mechanism, fixing between the mounting sleeve and the corresponding supporting leg is conveniently completed, at the moment, the corresponding faces of the outer shell and the metal support are attached, fixing between the outer shell and the metal support can be completed through bolts, the outer shell is easy to position and easy and convenient to assemble in the assembling process, and the assembling stability of the outer shell is improved.

The utility model discloses a vehicle wire harness connector and a vehicle, the vehicle wire harness connector comprises a male end sheath and a female end sheath, the male end sheath and the female end sheath are correspondingly provided with a plurality of wire harness access holes, the housing of the female end sheath is provided with a mounting warping plate, the housing of the male end sheath is provided with a mounting groove matched with the mounting warping plate, and the mounting warping plate is provided with a mounting groove matched with the mounting warping plate. And the mounting warping plates are positioned on the two sides of the female end sheath and are clamped with the mounting grooves on the corresponding sides. And the female end sheath and the male end sheath are clamped in a manner of arranging the mounting warping plate. The installation warping plates are arranged on the two sides of the female end sheath, the female end sheath is connected with the two ends of the male end sheath, the connection stability is improved, the installation warping plates at the two ends achieve the guiding effect on connection of the male end sheath and the female end sheath, smooth connection of wire harnesses is guaranteed, winding disorder is avoided, and when maintenance and disassembly are needed, the installation warping plates are not damaged. The female end sheath can be easily separated from the male end sheath by pressing down the mounting warping plates on the two sides, and maintenance personnel can carry out disassembly and assembly work with one hand under the condition that the space is limited, so that the maintenance efficiency can be improved.

The utility model relates to rectifying device technical field especially a kind of pyridine methanol rectifying device of stable assembly type, including base, the top side of base is equipped with support frame, the side of support frame is equipped with several mutually superposed tower tubes, the both ends of each tower tube are equipped with flange, two adjacent flanges are connected by bolt, the side of support frame is equipped with several fixed plates, the one end of each fixed plate is arc-shaped setting, and the one end of each fixed plate is stretched to the both sides of tower tube, the side of each fixed plate is connected with first arc-shaped connecting plate and second arc-shaped connecting plate. First arc-shaped connecting plate and second arc-shaped connecting plate can be connected with the flange on each tower tube in the application, and first arc-shaped connecting plate and second arc-shaped connecting plate are also connected on support frame by fixed plate, so that each tower tube can be supported by support frame, so that the pressure received by each tower tube is same, and assembly stability is improved.

The application discloses a camera connector and a camera device. The camera connector comprises a rear cover assembly, a conversion assembly and a board end assembly. The rear cover assembly comprises a cover body and a rear cover inner conductor. The cover body has a first mounting cavity, and the rear cover inner conductor is mounted in the first mounting cavity. The conversion assembly comprises a conversion piece and a conversion inner conductor. The conversion piece has a second mounting cavity and is connected to the cover body. The conversion inner conductor is mounted in the second mounting cavity and comprises a first part and a second part connected to each other. The first part has a conversion cavity. The conversion inner conductor comprises a first opening part which is arranged on the outer peripheral wall of the first part and is communicated with the conversion cavity. The rear cover inner conductor is connected to the first part and is arranged in the conversion cavity. The board end assembly is arranged in the second mounting cavity and comprises a board end inner conductor which is connected to the second part. The camera connector can avoid the assembly looseness of the rear cover assembly and the conversion assembly, and improve the assembly stability of the vehicle-mounted camera. The camera device with the camera connector has the above advantages.

The invention relates to the technical field of batteries, and discloses a pole column and a forming process thereof, a battery cell cover plate assembly and a battery cell. The pole forming process comprises the following steps: stamping and blanking a conductive composite board along a Z direction to obtain a pole body; wherein the pole body comprises a first conductive section and a second conductive section; wrapping and limiting the first conductive section, and extruding and expanding the local part of one end, far away from the first conductive section, of the second conductive section along the Z direction, so that an annular flange is formed on the side wall of the second conductive section on the X-Y plane; stamping and stretching the local part of the annular flange to enable the free end of the annular flange to form a pole turnup; wherein the pole turnup comprises a first turnup and a second turnup which are connected with each other, the first turnup extends towards the direction far away from the second conductive section along the Z direction, the first turnup and the first conductive section are arranged at an interval, and the second turnup extends towards the direction far away from the first conductive section. The pole prepared by the invention can reduce heat transferred to the upper plastic, and the insulating property of the pole is guaranteed.

The utility model relates to the technical field of battery modules, and provides a battery module cover plate which comprises a cover plate body, a groove and a first air bag are arranged on the inner side of the cover plate body, and the groove is communicated with the first air bag through an inflation channel; a control seat capable of axially moving is arranged in the groove, the control seat is in sealing fit with the inner wall of the groove, and the moving stroke of the control seat is configured to drive the first air bag to expand by compressing air in the groove. Through collaborative design of the control seat and the first air bag, active inflation sealing is realized, and when the battery module shell is assembled, mechanical force of shell assembly is converted into air pressure energy in the air bag, so that the second sealing element is more tightly and uniformly attached to a sealing surface, and the battery module shell is particularly suitable for scenes with complex curved surfaces or uneven sealing surfaces; and the initial sealing reliability is obviously improved.

This application belongs to the field of wind turbine technology, specifically relating to a wind turbine assembly device. The wind turbine assembly device includes: a fixing component, a conveying mechanism, a first feeding mechanism, a second feeding mechanism, and an assembly mechanism. The fixing component is used to fix the casing; the conveying mechanism has loading / unloading stations and an installation station, with the fixing component located on the conveying mechanism, which sequentially conveys the fixing component to the loading / unloading stations and the installation station; the first feeding mechanism conveys flanges to the fixing component at the loading / unloading stations; the second feeding mechanism conveys fasteners to the fixing component at the installation station; and the assembly mechanism installs the fasteners after they are conveyed by the second feeding mechanism, thus connecting the casing and the flange. This allows for automatic loading and assembly of the casing and flange, resulting in high assembly efficiency.

The invention relates to the technical field of screwdrivers, and discloses a multifunctional electric screwdriver which comprises a shell, a gyroscope and a pressure sensor which are arranged in the shell, a rotating shaft arranged at the bottom of the shell, a screwdriver blade arranged on one side of the rotating shaft and a telescopic unit arranged at the bottom of the rotating shaft. The telescopic unit comprises an adjusting telescopic assembly arranged in the rotating shaft and a clamping assembly arranged in the adjusting telescopic assembly, the adjusting telescopic assembly is used for adjusting the telescopic screwdriver blade, and the clamping assembly is used for clamping the screwdriver blade. The length of the screwdriver head can be adjusted through the telescopic unit, the screwdriver can adapt to various working conditions of deep holes, narrow grooves, protruding structures and the like, the replacement frequency of the screwdriver head is reduced, and the use cost is reduced. Through cooperation of a rotary knob, a clamping groove, a clamping block, a reset spring, a limiting rod and a limiting groove, single-hand quick unlocking, adjustment and automatic locking are achieved, adjustment is stable and does not move, operation is easy and convenient, positioning is accurate, and the use efficiency and reliability are greatly improved.

The utility model discloses an ancient building suspended ceiling slope light structure which comprises a central pointed suspended ceiling which comprises a first inclined plate and a second inclined plate, the upper end of the first inclined plate is in butt joint with the upper end of the second inclined plate through a connecting frame, and the top of the first inclined plate tilts upwards to be provided with a first fence; the edge suspended ceiling is fixed at the edge of the central pointed suspended ceiling, and the inner side of the edge suspended ceiling extends to form a second fence which is tilted upwards; the first lamp is arranged on the surfaces of the first inclined plate, the second inclined plate and the edge suspended ceiling; the second lamp is arranged on the inner side of the first fence and the inner side of the second fence in a hidden mode. Wherein the central pointed suspended ceiling and the edge suspended ceilings are hung on a top beam in the pointed roof through first hanging rods. The special-shaped suspended ceiling can solve the problems that the structural strength of the butt joint positions of all the sections of the special-shaped suspended ceiling in an existing ancient building is insufficient, damage is obvious when the special-shaped suspended ceiling is used, internal light is insufficient, and dazzle light interference exists.

The invention relates to the technical field of membrane separation, and discloses a multi-channel filtering membrane bag which comprises a membrane bag body, and the membrane bag body at least comprises a first functional unit, a material channel layer and a second functional unit which are sequentially stacked in the thickness direction; the first functional unit comprises two first functional film layers which are oppositely arranged and a first supporting flow guide layer located in the middle, and the first functional unit is formed by welding in advance; the second functional unit comprises two second functional film layers which are oppositely arranged and a second supporting flow guide layer located between the two second functional film layers, and the second functional unit is formed by welding in advance; the first functional unit, the material channel layer and the second functional unit are provided with mutually aligned communicating hole sites, and are connected in a peripheral sealing manner to form an integral membrane bag structure, so that different functional membrane layers and a material flowing area form an integrated structure, and various treatment processes such as filtration, concentration, cleaning or gas transfer and the like can be realized in the same membrane bag; therefore, the functional integration level of the membrane module is improved.

The utility model discloses a kind of cooling tower multilayer sealing water leakage prevention center cylinder, belong to cooling tower technical field, including center cylinder main body, center cylinder main body is by first bending plate and second bending plate interconnect and constitute. First bending plate is U type, and first side flange is provided in two side edges;Second bending plate is flat plate, and second side flange is provided in two side edges. First side flange and second side flange are Z type, mutually adhere to each other and be connected by bolt, and sealing layer is provided between adhering surface. The utility model solves the problems of low production efficiency, high cost, insufficient water leakage prevention ability and other problems in the prior art, realizes the manufacture of efficient, low-cost and superior water leakage prevention performance of cooling tower center cylinder.

The utility model relates to the technical field of heat preservation pipes, and discloses a pressure-resistant polyurethane heat preservation pipe which comprises a heat preservation pipe body, a connecting clamping plate is fixedly installed on the outer surface of the heat preservation pipe body, a connecting sleeve plate is arranged on the outer surface of the heat preservation pipe body in a sliding mode, and a pressure-resistant layer is fixedly installed on the outer surface of the connecting sleeve plate. A plurality of reinforcing ribs are fixedly connected between the inner surface of the pressure-resistant layer and the outer surface of the connecting sleeve plate, a limiting ring is rotationally arranged on the outer surface of the heat preservation pipe body, and a limiting pipe is rotationally arranged on the outer surface of the heat preservation pipe body; according to the utility model, through the cooperation of the thermal insulation pipe body, the connecting clamping plate, the connecting sleeve plate, the pressure-resistant layer, the reinforcing ribs, the limiting rings, the limiting pipes, the sliding rods, the sliding grooves and the springs, when a plurality of thermal insulation pipes are spliced and assembled, the friction force at the splicing part of the thermal insulation pipes is increased through the cooperation of the limiting pipes and the limiting rings, so that the assembling stability is improved.

This utility model discloses a water heater repair cover and a water heater. The water heater repair cover includes a first cover body and a second cover body. The first cover body has a first mating end with an insertion slot and a fastener located in the insertion slot. The second cover body has a second mating end with an insertion long side, a fastening hole on the insertion long side, and a support structure. The insertion long side is inserted into the insertion slot to achieve an insertion fit in a first direction, and the fastener is inserted into the fastening hole to achieve a fastening fit in a second direction. The water heater repair cover provided by this utility model includes a split design of the first cover body and the second cover body, and adopts an assembly method combining insertion and fastening, which simplifies the assembly method, reduces manufacturing costs, and improves appearance quality. Furthermore, by using a support structure that extends into the insertion slot and is supported on the inner wall surface forming the insertion slot, it can prevent the first cover body or the second cover body from collapsing, thereby improving assembly stability.

This invention discloses a semi-automatic assembly equipment for flexible copper busbar plugs. The flexible copper busbar plug includes a flexible copper busbar, a plug housing, and a sleeve. The equipment includes a rotary feeding mechanism with several carriers, and a first manual station, a second manual station, a positioning station, a crimping station, an inspection station, and a unloading station arranged sequentially along the rotation direction of the rotary feeding mechanism. The carriers are used to carry the flexible copper busbar plugs. The first manual station is used for pre-assembling the flexible copper busbar and plug housing onto the carrier. The second manual station is used for assembling the sleeve with the pre-assembled semi-finished products of the flexible copper busbar and plug housing mounted in the carrier. The unloading station includes an unloading clamping mechanism and an unloading conveying mechanism for unloading the finished flexible copper busbar plug. This invention adopts a semi-automatic design, combining manual pre-assembly with automated crimping and inspection, which reduces reliance on high-precision components and equipment costs, reduces the risk of frequent failures, and is more suitable for the production scenarios of small and medium-sized manufacturing enterprises.

This utility model relates to the field of transmission shaft press fitting technology, and discloses a transmission shaft press fitting with an elastic positioning structure, including a column, two limiting plates, a limiting pin, a cylindrical fork, and a transmission shaft. The transmission shaft is inserted into the column, and the top surface of the column is connected to the two limiting plates. The cylindrical fork is disposed between the two limiting plates and inserted into the top surface of the column. The cylindrical fork has an ear hole, and the limiting pin is inserted into the positioning hole and the ear hole of the limiting plate in sequence. This utility model effectively eliminates the phase angle error caused by the welding angle deviation of the anti-rotation plate in the traditional positioning method by precisely matching the spline positioning sleeve in the elastic positioning component with the external spline of the transmission shaft, greatly improving the phase angle accuracy of the transmission shaft and cylindrical fork assembly. The design of the buffer spring ensures that the spline positioning sleeve maintains close contact with the external spline of the transmission shaft during the press fitting process, while providing a certain buffering force, reducing the impact and vibration during the press fitting process, and enhancing the stability of the assembly.

The utility model discloses a rotatably-installed ceiling lamp which comprises a lamp body, a fixed ring and a rotating ring, and the lamp body and the rotating ring are assembled and fixed. A buckle lug is arranged on the inner wall of the fixed ring, a limiting wall is arranged on the outer wall of the rotating ring, and the limiting wall is obliquely arranged to form an oblique limiting groove; the other end of the limiting groove is closed; the buckling lug slides into the limiting groove from the opening end of the limiting groove and is clamped with the limiting wall, so that the rotating ring and the fixed ring are assembled and fixed; a bone position piece is arranged on the outer side of the limiting wall and connected with the rotating ring to form a reinforcing structure for the limiting wall. A bone position frame is arranged between the buckle lug and the side wall of the fixing ring, and the bone position frame is connected with the fixing ring and the buckle lug to form a reinforcing structure for the buckle lug. In this way, the structure reinforcing effect on the limiting grooves and the structure reinforcing effect on the buckle lugs can be achieved, the assembly stability of the rotating ring and the fixed ring is higher, the rotating ring and the fixed ring are not prone to falling off, and installation and operation are convenient and fast.

The application discloses a driving mechanism, comprising a motor and a hinged seat; the output end of the motor is provided with an adapter, the adapter has a torque output end, the hinged seat has a torque input end, the adapter transmits the torque of the motor to the hinged seat through the concave-convex cooperation of the torque output end and the torque input end, and a buffer pad is arranged on the torque transmission path of the torque output end and the torque input end, so that the mutual impact between the adapter and the hinged seat is filtered during the torque transmission process; the application provides a driving mechanism which solves the problem of poor impact resistance of the transmission driving mechanism.

This utility model discloses a modular flowerpot tray device, relating to the field of flowerpot trays, comprising a water collection box, a support frame, a protrusion, a water guide groove, a drain pipe, and a pipe groove; one or more support frames are provided at the upper opening of the water collection box; the support frame consists of a support plate, legs, and permeable holes; multiple legs are connected to the bottom edge of the support plate, and permeable holes are provided on the surface of the support plate; the support frame is placed directly inside the water collection box; a water guide groove is provided on the bottom inner wall of the water collection box, and two drain holes communicating with the water guide groove are provided on the side wall of the water collection box, one drain hole being connected to the drain pipe, and the other drain hole being connected to the pipe groove, the diameter of the drain pipe being adapted to the pipe groove; this modular flowerpot tray device integrates support, drainage, water collection, and flow guidance functions, with a reasonable structural design and strong practicality.

The utility model relates to a kind of clean sewage separation pet water dispenser, including water purification device, sewage tank, water tray, water supply assembly and water pump are provided in water purification device, water supply assembly is set apart and includes mainboard and the control unit and first conductive structure set on mainboard, water pump is electrically connected in mainboard.Sewage tank and water drinking tray are set in the same side of water purification device, water drinking tray is covered in the upper of sewage tank, and water drinking tray has circulating pump and second conductive structure.Water pump is extracted to water drinking tray in the clean water in water purification device for pet drinking, circulating pump opens to make the water in water tray circulate and flow, sewage tank collects dirty water in water tray, water purification device and sewage tank are separately arranged to realize clean sewage separation.Water tray in the application is installed in the side of water purification device by magnetic attraction, and first conductive structure and second conductive structure are electrically connected, realize that circulating pump is electrically connected with mainboard, and thus the control unit on water supply assembly can control the working condition of water pump and circulating pump together.

The invention discloses a double-arm robot cooperative assembly control method and system, and relates to the technical field of robot cooperative assembly control, and the method comprises the steps: obtaining the assembly state data of a double-arm robot in the assembly process of a flexible assembly part; decomposing the cooperative force based on the assembly state data to obtain an internal force component and an external force component; determining deformation characterization data based on the internal force component and the assembly state data; correcting the target assembly pose based on the deformation characterization data, and generating compensated collaborative assembly target data; generating a double-arm collaborative assembly control instruction based on the internal force component, the external force component and the compensated collaborative assembly target data; and executing an assembly action according to the control instruction and circularly updating the assembly state data. According to the method, the clamping coupling effect and the assembly propelling effect are controlled in a distinguished mode, the deformation influence of the flexible assembly part is brought into the assembly control process, and therefore the assembly precision, stability, process adaptability and control reliability of the flexible assembly part are improved.

This utility model discloses a support frame assembly for orthopedic joint surgery, including a base, a hook connected to one side of the base, a support column above the base, a support platform above the support column, support baffles on both sides of the support platform, a fixed bracket fixedly mounted on one side of the upper part of the support platform, a fixed plate connected to the fixed bracket, a rotating shaft on the other side of the upper part of the support platform, both ends of the rotating shaft connected to the support baffles, a flipping bracket rotatably mounted on the rotating shaft, a flipping plate connected to the flipping bracket, and a rotation drive component on the support platform to drive the flipping bracket to flip. This design, with its fixed plate and flipping plate, works together to adapt to different limb shapes and positioning needs of patients, facilitating intraoperative positioning and adjustment of the limbs.

A novel generator support belongs to the technical field of engines. A first generator mounting hole and a second generator mounting hole are formed in the support body and used for being fixedly connected with a generator assembly, and a first support mounting hole, a second support mounting hole, a third support mounting hole, a fourth support mounting hole and a fifth support mounting hole are formed in the support body and used for being fixedly connected with an engine cylinder. The first support mounting hole and the fifth support mounting hole are axial holes and used in cooperation with an axial positioning structure of an engine cylinder block, and an avoiding structure, a weight reduction structure and a plurality of reinforcing ribs are arranged on the support body. The novel generator support provided by the utility model has remarkable beneficial effects in the aspects of stably fixing a generator assembly, realizing lightweight design, optimizing spatial arrangement, improving assembly precision and stability, enhancing structural strength, facilitating maintenance and replacement, integrally casting and forming and the like, and has wide application prospect and market value.

The utility model discloses a kind of maintenance-free butterfly valves, including valve body assembly and butterfly piece assembly.Valve body assembly is constituted by butterfly valve body, end cap, hand wheel and valve stem, hand wheel is installed in end cap side wall, valve stem can be driven to rotate.Butterfly piece assembly includes butterfly piece, sealing washer, sealing box, micro air pump, air pipe and air nozzle etc., butterfly piece is fixed in the outer circle bottom section of valve stem, its outer circle is equipped with sealing groove for being clamped into sealing washer inner ring, there is cavity in sealing washer inside and can be deformed, rear side is equipped with air nozzle.Sealing box is fixed in the rear side of butterfly piece, inside has micro air pump, dry battery and controller, air pipe connects micro air pump with air nozzle.Butterfly piece is controlled to open and close by hand wheel, micro air pump exhausts air to make sealing washer expand and contract, realize sealing and opening, and sealing washer outer ring surface expands and is in close contact with the side wall of valve body inner cavity, sealing effect is good;Sealing washer can reduce friction between valve body after contraction, reduce the frequency of maintenance.

The application discloses a battery pack box, battery cells include upper layer battery cells and lower layer battery cells arranged in a vertical direction, the box includes a box frame, the box frame is provided with a plurality of first placement areas for accommodating the lower layer battery cells, the box further includes a bracket arranged on the top of the box frame, the top of the bracket is provided with a second placement area for accommodating the upper layer battery cells, the box frame is provided with a first step portion, the bottom surface of the bracket abuts against the step surface of the first step portion so that the bracket is arranged on the box frame. The installation of the bracket on the top of the box frame limits the lower layer battery cells in the vertical direction, and interference or collision and wear of the lower layer battery cells and the upper layer battery cells can be avoided, and partition protection is realized. The first step portion limits the bracket, and in the installation process, the bracket is in abutment with the step surface of the first step portion, the bracket is prompted to be in place during installation, and the assembly stability and the assembly efficiency are improved.