50results about How to "Reduce layout" patented technology

This invention belongs to the field of robot joint technology, specifically relating to a rope-driven, decoupled, dual-parallel five-DOF bionic shoulder joint, including a scapulothoracic joint mechanism, a glenohumeral joint mechanism, a drive base device, and drive ropes. The scapulothoracic joint mechanism and the glenohumeral joint mechanism are internally rotatably connected. The drive base device is used to fix the scapulothoracic joint mechanism and to provide drive ropes for both mechanisms. The scapulothoracic joint mechanism is constrained by a first constraint branch, a second constraint branch, and a decoupling through-line branch, satisfying the pure rolling two-DOF rotation requirement, driven by two sets of antagonistic drive ropes. The glenohumeral joint mechanism is driven by four independent drive ropes to achieve three-DOF rotational motion. The decoupling through-line branches distribute the drive ropes of the glenohumeral joint mechanism, achieving physical decoupling and ensuring that the drives of the two mechanisms do not interfere with each other. Through rope-driven and dual-parallel passive mechanisms, a larger range of motion can be achieved, improving the stiffness and load-bearing capacity of the mechanism.

The utility model relates to the technical field of connector, specifically relates to a socket connector and battery pack. The battery pack includes battery pack casing and the socket connector fixed on the side wall of battery pack casing, and the socket connector includes socket casing and shield cover, and the socket casing has the installation surface and the plug-in cavity, and the plug-in cavity is equipped with the plug-in convex part, and the plug-in convex part is equipped with the plug-in terminal, and the shield cover includes the main cylinder of sleeveing in the plug-in convex part, and the one end of main cylinder is equipped with the everted edge near the bottom of plug-in cavity, and the end of everted edge is equipped with the shield wear -out part away from main cylinder, and the socket casing is equipped with the shield through -hole through plug-in cavity and installation surface, and the shield wear -out part is arranged in the shield through -hole and the tail end of shield wear -out part is equipped with the shield contact part, and the installation surface is equipped with the sealing structure in the periphery of shield wear -out part. The shield cover of step structure can reduce the size of socket connector, and avoid occupying too much space.

The invention discloses a PET bottle flake cleaning pretreatment device and method, and relates to the technical field of PET recovery. To solve efficiency problems; the device specifically comprises a cleaning box, a discharging mechanism is arranged on the inner side of one end of the cleaning box, a containing box is arranged on the outer side of the end, close to the discharging mechanism, of the cleaning box, and multiple beating mechanisms are arranged on the inner side of the cleaning box; the discharging mechanism comprises a connecting shaft fixed to the cleaning box and a first filter plate rotationally connected to the outer wall of the connecting shaft, first side plates are fixed to the two sides of the first filter plate through bolts, scraping blocks are slidably arranged on the opposite sides of the two first side plates, and the scraping blocks are in contact fit with the first filter plate. According to the bottle chip cleaning device, the discharging mechanism is arranged, the cleaned bottle chips are continuously picked up through vertical rotation of the first filter plate, then the bottle chips are scraped into the containing box through the scraping block, meanwhile, flapping and conveying of the flapping mechanism are matched, assembly line type cleaning operation can be achieved, and the cleaning efficiency is improved.

The present application relates to the technical field of bridge quality detection, especially to a continuous beam bridge different span loading load test method, comprising the following steps: determining a control section on the continuous beam bridge; measuring the axle load and the wheelbase of the test vehicle; calculating and analyzing the interval area of the calculated bending moment change effect function with the moving vehicle; analyzing and calculating the interval area of the measured bending moment change effect function with the moving vehicle; comparing the ratio of the interval area of the calculated bending moment change effect function with the moving vehicle and the interval area of the measured bending moment change effect function with the moving vehicle through the calibration coefficient to determine whether the bearing capacity requirement is met. The continuous beam bridge different span loading load test method can effectively reduce the arrangement of measuring points and the need for test vehicles, and quickly and accurately judge the bearing capacity state of the bridge by calculating the bending moment change effect function with the moving vehicle and the measured bending moment change effect function with the moving vehicle.

This utility model belongs to the field of battery technology and discloses a battery heating film and a battery. The battery heating film is connected to a battery cell. The heating film includes a heating film body, a conductive element, and an insulating film. The conductive element is electrically connected to the heating film body for conductive connection to an external power source. The insulating film covers the surface of the heating film body in the thickness direction. The heating film body has connection holes, and the insulating film has connection portions corresponding to the connection holes. The connection portions on both sides of the heating film body in the thickness direction are fixedly connected to limit the relative position of the insulating film and the heating film body. Thus, through the conductive element's conductive connection to an external power source, the heating film body is energized and heated, enabling uniform heating of the battery cell surface, saving on the need for a heat spreader, and simplifying the structure of the battery heating film.

The application discloses a supporting structure of a fabricated laminated slab and a construction method thereof, and comprises a plurality of horizontally arranged horizontal rods and vertically arranged vertical rods, wherein the horizontal rods comprise X-axis rods and Y-axis rods which are perpendicular to each other and form a three-axis system perpendicular to the vertical rods along a Z-axis; a component is arranged at the intersection of each node to connect the vertical rod and the horizontal rod; each vertical rod is provided with a top support which is adjustably connected to the top of the vertical rod; and each top support is connected with an adjacent top support through a horizontal rod. The top support and the component are used as the node connecting piece, the overall stability of the formwork supporting system is improved, the arrangement of the horizontal rods is reduced, the specifications of the supporting rods and the connecting pieces are unified on the basis of meeting the vertical bearing capacity and the overall stability, the number of the rods is reduced, the construction efficiency is improved, and the materials are saved while the construction quality is ensured.

The utility model discloses a train fault linear array photographing device placed on parallel rail surfaces and having a self-cleaning function, belongs to the technical field of photographing devices, and aims to solve the problems that a traditional train fault linear array photographing device is unreasonable in arrangement height and poor in cleaning adaptability to an image acquisition area during working. A line scanning imaging system and a control and data processing unit are installed in the protection shell, the control and data processing unit is used for controlling the line scanning imaging system to conduct image collection and sending collected images to a terminal after conducting primary processing on the collected images, and a self-cleaning system is installed at the outer top of the protection shell; and the self-cleaning system is used for cleaning an image acquisition area at the front end of the protective shell. The linear array image acquisition device is mainly used for train bottom and wheel set fault detection.

This invention discloses a machine vision-based unattended monitoring and early warning method, device, and system for tunnel water inrush, comprising: calculating the optical flow vector of each pixel in the tunnel face image; determining the location, number, and optical flow vector of the inrush point based on the optical flow vector of each pixel; determining whether the inrush point has disappeared based on the change in the optical flow vector at the inrush point; determining whether a water inrush exists based on the optical flow vector at the inrush point and determining the optical flow vector at the water inrush location; determining the water volume of the water inrush based on the optical flow vector at the water inrush location; and determining whether to issue an early warning based on the water volume. By utilizing the motion characteristics of the water inrush, the optical flow method is used to monitor the range of tunnel water inrush, achieving real-time monitoring of tunnel water inrush.

The application discloses a floating oscillating water column type wave power generation device, which comprises a runner chamber I and a protective cap, a nozzle is arranged in the runner chamber I, a flow guide cone is arranged below the nozzle and has the same central axis with the nozzle, the flow guide cone is conical and has a downward pointed end, an impeller is arranged above the nozzle and has the same central axis with the nozzle, a generator is arranged above the impeller and has the same central axis with the impeller, the protective cap is arranged on the top of the runner chamber I, and gaps for air circulation are arranged at the edges of the runner chamber I and the protective cap. The nozzle with the flow guide cone structure is adopted in the application, the flow guide cone can guide the flowing direction of air flow, accelerate the flowing speed of the air flow in the device, and slow down the wave upwelling phenomenon in the runner chamber, thereby protecting the internal components of the device. The protective cap can effectively protect the generator and the controller in the device from the erosion of rainwater and sea air, thereby prolonging the service life of the device.

The utility model discloses a lifting type rotating device for copper-clad plate packaging, and relates to the technical field of copper-clad plate packaging. The side pushing mechanism comprises a rotary table, a table top and two side pushing mechanisms, the table top is rotationally arranged on the rotary table through a rotary support, a rotary mechanism is arranged between the table top and the rotary table, the four side edges of the table top are each provided with a set of strip-shaped grooves perpendicular to the side edges of the table top, and the opposite sides of the rotary table are each fixedly provided with a set of first cross beams; and a group of second cross beams are fixed on the other opposite sides of the rotary table. Products can be stacked and reversed through the cooperation of the rotary table and the table top, the four side edges of the products on the table top can be positioned through the design arrangement of the two side pushing mechanisms, the stacking state of the products can be ensured, the products can be stably stacked in the center of the table top, and the product stacking efficiency is improved. And the stacking efficiency, the stacking precision, the packaging efficiency and the automation degree can be greatly improved.

The utility model relates to the technical field of seat headrest, specifically relates to a car seat music headrest structure, including headrest rod, bottom cover, mounting plate, two acoustic bodies, connecting wire harness and back cover, the utility model discloses through simplifying design, has reduced complex mechanical structure and circuit layout to reduce production cost. This makes the car manufacturer can provide high-quality acoustic experience in a more economical way. Due to the simplified structure, the additional components and lines on the seat are reduced, thereby improving the comfort and safety of the seat. The headrest structure adopts a simple connection method such as clamping, making the installation and maintenance process more convenient and fast. Not only can the installation time be saved, but also the operation can be quickly completed when maintenance or replacement of parts is needed. Thus, the problem of increased production cost caused by the complex structure of the existing car seat music headrest is solved.

This invention relates to an electrochemical lithium-ion sieve-based lithium extraction apparatus and method, belonging to the field of electrochemical lithium extraction. The apparatus and method mainly comprise: a first end plate, a second end plate, and several electrolytic cell units assembled together. The electrolytic cell units are located between the two end plates. After brine and supporting electrolyte enter the electrolytic cell unit, due to the crisscrossing of the flow guide holes on the cathode and anode guide plates, the brine and supporting electrolyte flow to the cathode and anode respectively. Under the action of an electric field, lithium ions in the brine are absorbed by the lithium-deficient ion sieve on the cathode, transforming into lithium-rich ion sieves. Lithium ions from the lithium-rich ion sieve on the anode are released into the supporting electrolyte, transforming into lithium-deficient ion sieves. After draining the brine and supporting electrolyte, the apparatus is rinsed with pure water, and the brine and supporting electrolyte are exchanged, with the current direction changed, repeating the cycle to achieve selective extraction of lithium from the brine.

The utility model discloses single cylinder control multi -claw mechanism relates to mechanical automation technical field, it is designed to solve the traditional multi -claw mechanism in the process of using, adopt the mode of independent drive of multiple power source, lead to the problem of high production cost, and high failure rate, including clamping subassembly, oil injection subassembly and oil recovery subassembly, oil injection subassembly sets up at the top of clamping subassembly, oil recovery subassembly sets up at the bottom of one side of clamping subassembly, clamping subassembly includes frame, one side of the bottom of frame is provided with cylinder, and the output of cylinder is provided with movable plate, the top of movable plate is provided with support plate, and support plate is located inside the frame. The utility model discloses through design clamping subassembly, not only greatly reduced hardware procurement cost, also reduced the arrangement of circuit and air pipe, make the whole structure of mechanism more simple, and the space occupancy rate reduces 30% or more, can nimble adaptation narrow production station.

The motor cooling device is characterized in that at least one water inlet and at least one air outlet are formed in the top of a radiator assembly, at least one water outlet and at least one compensation water gap are formed in the bottom of the radiator assembly, and the compensation water gap is formed in the side face of one water outlet; an upper water chamber and a lower water chamber which are communicated with each other are formed in the radiator assembly, the water inlet is communicated with the upper water chamber, and the water outlet is communicated with the lower water chamber; one end of the electronic water pump is connected with the water outlet of the radiator through a connecting rubber pipe, and the other end is connected with a motor or a whole-vehicle to-be-cooled component. The water inlet of the radiator shares one water chamber, and the water outlet of the radiator shares one water chamber, so that two motor cooling loops of a mining vehicle can share one compensation water port to supplement cooling liquid, and generated water vapor can be discharged to the expansion kettle by sharing one air outlet; the arrangement of related lines and pipelines is reduced, and the arrangement space of the whole vehicle is optimized.

The application discloses a composite material large-curvature skin shape detection device and a detection method, and belongs to the technical field of large-curvature skin shape detection. The composite material large-curvature skin shape detection device comprises a base, a supporting assembly is connected to the middle part of the top end of the base, first rectangular sliding grooves are formed in the two ends of the supporting assembly, and fixing assemblies are installed in the inner cavities of the first rectangular sliding grooves. Through the combination transmission mode of the rotating wheel, the rotating belt and the bevel gear, synchronous linkage operation of automatic centering clamping of the two ends of the skin and automatic pressing detection of the detection mechanism is realized, the overall structure of the equipment is greatly simplified, the arrangement of power components is reduced, the equipment failure rate and manufacturing cost are reduced, the timing of the clamping action and the detection action is highly unified, the problems of clamping out of position, detection deviation and mechanism interference are avoided, and the stability and automation degree of the detection process are significantly improved.

The application provides an outer rotor motor, which comprises a rotor assembly, a rotor shell, a stator assembly and a bearing. The end of the rotor assembly is connected with the axial end of the rotor shell, so that the rotor assembly can rotate integrally with the rotor shell. The bearing is located at the inner periphery of the axial end of the rotor shell to support the rotor shell. The axial other end of the rotor shell extends to the radial outer periphery of at least part of the structure of the stator assembly. The rotor shell can be driven to rotate by the stator assembly, so as to drive the rotor assembly to rotate integrally. According to the application, the arrangement of one bearing can be effectively reduced. Compared with the conventional outer rotor motor structure which needs to be provided with two bearings, or the scheme of one long bearing, the cost of one small but high-priced bearing is effectively saved, so that the cost of the outer rotor motor is reduced, and the noise and vibration are also reduced.

The application relates to the field of bridge support monitoring, in particular to an intelligent monitoring bridge support system. The intelligent monitoring bridge support system comprises a pot support body, a mechanical displacement monitoring assembly and a multistage vibration sensing unit. The pot support body comprises an upper plate, a spherical crown lining plate and a bottom plate, wherein the upper plate is bolted to a bridge beam body, and the bottom plate is fixed to a pier base through an anchoring piece. At least one set of telescopic guide rods is installed at the outer edge of the bottom plate, and the outer ends of the guide rods are connected to displacement reflection plates through polyurethane buffer pads; a reference platform is arranged on the corresponding upper plate, and the reference platform is in contact with the displacement reflection plates. The support system combines multistage vibration sensing and optical displacement monitoring structures, thereby simplifying the hardware configuration and reducing the overall cost.

This utility model discloses a product function testing device for quick material loading. The device includes a workbench, a fixed frame slidably fitted to the top outer wall of the workbench, a telescopic rod installed on the top outer wall of the fixed frame, a groove formed on the top outer wall of the workbench, and a threaded rod rotatably connected to the inner wall of the groove. A movable block is fixed to the bottom outer wall of the fixed frame, and the movable block is threadedly engaged with the threaded rod. A fixed platform is fixed to the top outer wall of the workbench, and two linearly arranged placement plates are fixed to the top outer wall of the fixed platform. Placement slots are formed on the top outer wall of each placement plate. This utility model, by incorporating the fixed frame, placement plates, grooves, movable blocks, threaded rods, ejector rods, sliding cavities, and push plates, allows for simultaneous testing of circuit boards on one placement plate and loading of another placement plate, improving testing continuity. Furthermore, after testing, the circuit board can be ejected from the placement slot for easy removal.

This invention discloses a novel underwater deployment device and application method for a cross-medium aircraft, relating to the field of aircraft deployment platform design. The device includes: a base fixed to the bottom of a water body; a deployment compartment for storing the aircraft and fixedly connected to the base; and a communication module disposed within the deployment compartment for docking and communication with the aircraft. The communication module includes a control unit that communicates with the actuators and the communication module within the deployment compartment. The deployment compartment is located underwater. The communication module is located either within the base or the deployment compartment, or it may float on the water surface via a buoyancy airbag. This deployment device operates underwater and deploys and recovers the aircraft wirelessly. It features a simple structure, low cost, minimal equipment requirements, high reliability, and a degree of concealment.

This application discloses a ceramic heating device, comprising: a heating mechanism, an adjusting mechanism, and a lifting mechanism. The heating mechanism includes one or more heating components, each of which includes a heating housing and multiple heating plates sequentially mounted on the heating housing in a left-right direction. The adjusting mechanism includes a pair of arc-shaped support plates arranged opposite each other, each arc-shaped support plate having an arc-shaped groove. The one or more heating components are arranged sequentially along the extension direction of the arc-shaped groove, and the two ends of each heating housing are respectively rotatably and slidably engaged with the arc-shaped grooves of the pair of arc-shaped support plates. The lifting mechanism includes a pair of lifting components that drive the pair of arc-shaped support plates to move synchronously in a up-down direction. The lifting mechanism and adjusting mechanism of this application work together to adjust the radiation range and radiation angle of the heating mechanism, realizing multi-angle and multi-directional heating of the sheet on the rollers of the three-roll calender, reducing energy consumption, and facilitating the cleaning and maintenance of the rollers.

This invention relates to the field of building block technology, specifically disclosing a user-friendly building block. The block comprises a main layer and an inner layer. The main layer is composed of an outer layer, a reinforcing layer, and an insulation layer. The inner layer has an installation plate and a decorative plate. The installation plate has pre-drilled holes for installing wall heating pipe assemblies. These assemblies consist of left and right connectors and a retractable corrugated metal pipe. The left connector rotates 40° via a rotating locking assembly for quick sealing. The decorative plate is detachably connected via a quick-release locking structure. Push rods one and two drive the left connector to move horizontally and rotate, achieving automatic and precise pipe connection. Retractable protective strips are configured on both sides of the installation plate, which are expanded or retracted by a magnetically repulsive pushing assembly. During construction, these strips can cover the pre-drilled holes and form protective edges. This invention integrates pipe pre-embedding, rapid assembly, and insulation functions, significantly improving construction efficiency, reducing maintenance costs, and preventing damage to the wall structure.

The invention relates to a method for coating and deep rolling a movable disc (B), the invention relates to a method for coating a brake disc (B), comprising the following steps: b) providing a device (V5) for coating the brake disc (B), d) providing a device (V7) for deep rolling the coated brake disc (B), e) providing a device (1) for transporting the brake disc (B), i) coating a first side of the brake disc (B), j) coating a second side of the brake disc (B), and k) deep rolling both sides of the coated brake disc (B), the brake disc (B) is transported by a transport device (1) at least between a device (V5) for coating the brake disc (B) and a device (V7) for deep rolling of the coated brake disc (B). In order to solve the problem, steps i) and j) are carried out in sequence on the same device (V5) for coating the brake disc (B).

This invention relates to a root-and-crown co-regulatory variable irrigation sunscald control system and method. The system includes a variable frequency water pump, main pipe, branch pipes, an integrated spray irrigation system, and a data acquisition and irrigation decision control system. The operating mode of the integrated spray irrigation system switches based on soil moisture data and crop information monitored by the system. The irrigation volume under different operating modes is calculated by the system based on monitored soil moisture data, meteorological data, and crop information. The advantages of this invention are: based on the soil-plant-atmosphere water transport continuum (SPAC) theory, it enables the formulation of differentiated irrigation strategies for roots and crowns according to soil and atmospheric water requirements, and combines this with the integrated spray irrigation system to switch between different irrigation functions, effectively improving sunscald control and providing technological support for the development of smart irrigation agriculture.

This invention provides a solid waste pretreatment device and a method for preparing lithium carbonate and antibacterial nanomaterials. The solid waste pretreatment device includes: a base; a support frame installed on top of the base, on which a stirring and reaction assembly is mounted for mixing and stirring materials during reaction; and a filtration assembly installed on top of the base. This invention integrates stirring, filtration, and adsorption functions, reducing material transfer between processes, significantly improving solid waste pretreatment efficiency, meeting the needs of continuous industrial production, and saving space occupied by equipment installation, thus reducing equipment layout and maintenance costs.

This utility model provides an intelligent water meter box, relating to the field of water supply metering equipment technology. It includes a box body, a main inlet pipe, a main valve, and at least one prefabricated water meter unit. The prefabricated water meter unit integrates segmented water distribution branch pipes, a gate valve, and an electronic water meter. The inlet end of the water distribution branch pipe is connected downstream of the main valve. The gate valve and the electronic water meter are connected in series between two adjacent water distribution branch pipes. Both ends of the gate valve and the electronic water meter are sealed to the adjacent water distribution branch pipes via a clamp-type structure. A display screen is integrated on the box door, and the display screen has a built-in controller. The controller is electrically connected to the electronic water meter via wiring terminals. This design improves space utilization, enhances installation and maintenance convenience, and increases the level of intelligence.

The utility model discloses a loading and unloading unit of an automatic spindle loading and unloading device. The loading and unloading unit comprises a sliding bracket, an adjusting frame and a push-pull assembly, a plurality of supporting rods are arranged on the sliding bracket, every two supporting rods form a group to form a supporting station, the supporting rods are movably inserted into an adjusting frame, and the adjusting frame is rotatably arranged on the frame; the push-pull assembly comprises a main push cylinder, a push plate and an auxiliary push cylinder; the main push cylinder is arranged on the adjusting frame; a push rod of the main push cylinder is connected with the sliding bracket; the auxiliary pushing cylinder is arranged on the sliding bracket, the pushing plate is connected to a pushing rod of the auxiliary pushing cylinder, and the pushing plate is located above the supporting rod of the supporting station; when the spindles are loaded, the main pushing cylinder drives the sliding bracket, and the auxiliary pushing cylinder drives the pushing plate to push the spindles into the working positions of the spindle shafts in a step-by-step pushing mode. Spindles are loaded in a step-by-step propelling mode, the requirement for the length of a spindle shaft is lowered, the loading efficiency of the spindles is improved, and the spindle loading device is suitable for old machine transformation projects.

The application provides a high-speed, high-efficiency and low-cost semiconductor optical communication device and a preparation method thereof. The high-speed, high-efficiency and low-cost semiconductor optical communication device comprises a first Bragg reflector, first to Nth active layers arranged in sequence along a first direction on one side of the first Bragg reflector, wherein N is an integer greater than or equal to 2; first to N-1th tunnel junctions, wherein any nth-1th tunnel junction is located between an nth-1th active layer and an nth active layer, n is an integer greater than or equal to 2 and less than or equal to N; first to N-1th current limiting layers arranged along the first direction, wherein any nth-1th current limiting layer is located on the side of the nth-1th tunnel junction along a second direction, and the nth-1th current limiting layer has an overlapping projection on the sidewall of the nth-1th tunnel junction along the second direction; and wherein the second direction is perpendicular to the first direction.

The invention discloses a commercial vehicle one-driving-two integrated controller power brick structure and a heat dissipation control method thereof. The commercial vehicle one-driving-two integrated controller power brick structure is specially applied to a dual-motor-driven commercial vehicle. Elements such as a filter assembly, a bus capacitor, a power module assembly and a control panel are integrated in a specific inversion brick shell, meanwhile, a heat dissipation device is arranged at the bottom of an inversion brick, a heat dissipation water channel of the heat dissipation device is designed in a U-shaped parallel mode, it is ensured that each power module is fully cooled, and uneven heat dissipation caused by too high water temperature is prevented; the heat dissipation distance is lengthened, and the heat dissipation effect is improved; a plurality of fixed-section throttling holes are formed in the water inlet position of the heat dissipation water channel, so that the pressure drop difference of the two water flow branches is reduced, and the flow limiting effect is achieved; in addition, a triangular guide structure is arranged at a branch opening of the water path to guide the flow direction of the water flow, and secondary flow equalization is carried out through a throttling hole of the power module; the water channels are designed to be unequal-width water channels, higher flow speed and higher heat exchange in the heat source area are achieved under the action of the guide ribs, and resistance and flow in the non-heat-source area are reduced.

The utility model discloses a kind of rocker door opening and closing, which belongs to the technical field of automobile manufacturing. It mainly includes: door body, main body, and the main body is fixedly connected with the door body, and is characterized by: the main body includes knob screen, circuit board, adjusting support, one end of the adjusting support is fixedly connected with the door body, and the other end is fixedly connected with the circuit board;The side of knob screen is fixedly connected with the circuit board;Wherein, the connecting point of knob screen with the circuit board is the axis to offset in multiple directions. The utility model realizes the control to part vehicle function by five-dimensional rocker with touch screen, reduces the arrangement of physical button, and also increases the function selection of liquid crystal screen in limited space. The utility model is mainly used for optimizing the remote control structure of door body.

The utility model discloses an elevator lifting driving host and an elevator, the elevator lifting driving host comprises a rack with an inverted U-shaped structure, a host shaft is rotatably mounted between two side walls of the rack, and the host shaft is driven by end driving power to rotate; a guide wheel is mounted at the top of the rack, the axial direction of the guide wheel is parallel to the axial direction of the main machine shaft, and the guide wheel is positioned obliquely above the main machine shaft; a steel belt is wound on the main machine shaft in the rack and is upwards led out after passing through a guide wheel; the guide wheel is arranged on the main machine, the steel belt is wound and led out through the guide wheel to guarantee the constant rope outlet point of the steel belt, therefore, arrangement of pulleys in a shaft is omitted, the shaft utilization rate is helped to be guaranteed, and the device is particularly suitable for occasions such as home elevators with limited shaft space.