110results about How to "No vibration" patented technology

The invention discloses an AI intelligent control pressure sore prevention self-adaptive mattress system which comprises a mattress body provided with a polymer support column structure covering in all directions and designed into a plurality of areas, and the areas are accurately divided to support a human body and disperse pressure; the sensor array module is used for recording monitoring data of contact between each part of a human body and a plurality of areas of the mattress body in real time; the AI chip control module integrates an advanced algorithm and a processor and is used for receiving and analyzing the monitoring data from the sensor and sending out a control instruction based on an analysis result; and the database management module is used for storing monitoring data of patients with different weights, heights, ages and body positions and is used for predicting and early warning pressure sore risks. According to the invention, pressure sore risk areas can be accurately identified in a zoning manner, pressure, temperature and humidity information can be monitored in real time, and meanwhile, a proper pressure state is automatically adjusted, so that the occurrence of pressure sores is effectively prevented.

The utility model relates to the technical field of existing building foundation reinforcement treatment, in particular to an existing subway tunnel reinforcement structure adopting a concrete-filled steel tube mixing composite pile, which comprises a mixing pile and a concrete-filled steel tube core pile from outside to inside, the concrete-filled steel tube core pile is composed of a steel tube and concrete poured into the steel tube, the pile top of the concrete-filled steel tube mixing composite pile is located outside the duct piece, a reinforcement cage is arranged in the pile head of the concrete-filled steel tube mixing composite pile in a penetrating mode, and a longitudinal beam is arranged in the subway tunnel. And the longitudinal beams and the reinforcement cage are connected and fixed to form an integral structure. The utility model has the advantages of large pile forming, reasonable structure stress, high bearing capacity, short construction equipment, slight disturbance, no pollution, low vibration and low noise.

The invention relates to the technical field of mineral crushing and division, in particular to a mineral grinding, bisection and cleaning device and a control method thereof. A grinding mechanism, a dichotomy mechanism and a cleaning mechanism are arranged in the placing frame; the grinding mechanism comprises a grinding plate; one side of the outer wall of the grinding plate is fixedly connected to one side of the interior of the placing frame; a grinding cavity is fixedly connected to the top end of the outer wall of the grinding plate; a feeding motor drives a first chain wheel to rotate, the first chain wheel drives a second chain wheel, a rotating rod and a threaded roller to rotate through a first chain, the threaded rod rotates, minerals in a feeding shell gradually move towards a feeding through groove in a feeding block, and therefore the minerals fall into a grinding cavity, and due to the fact that the minerals are evenly fed part by part, the feeding efficiency is improved; according to the mineral grinding device, the minerals are uniformly ground, so that the grinding quality of the minerals is better, and the minerals are not poured into the grinding cavity at one time, so that the grinding cavity is not greatly abraded.

The utility model relates to the technical field of insulation board processing, especially to a high -strength insulation board anti -bending performance detection device, including frame, be provided with processing mechanism on the frame and be used for insulation board processing, processing mechanism includes: take and put subassembly, set up on the frame and be used for insulation board taking and placing, feed assembly, including the right table board of fixed right end on the top of frame, the right end inside the frame is equipped with first hydraulic cylinder, and the output of first hydraulic cylinder is fixed with base plate, and the top of four corners of base plate is all fixed with guide rod, and guide rod and right table board penetrate through sliding installation, and the top between four corners's guide rod is fixed with the supporting plate, detection component sets up on the frame and is used for insulation board bending degree detection, through the hydraulic drive four -corner guide rod realizes the steady feed of insulation board, and the cylinder controls detection component intelligent avoidance, and hydraulic loading cooperates sensor accurate measurement anti -bending performance, realizes the full -process automation from feed, taking and placing to detection, ensures the test accuracy and operation efficiency.

The utility model provides a hydraulic press with balance cylinders, which is characterized in that a plurality of return cylinders and balance cylinders are arranged between a workbench and a slide block component, the number of the balance cylinders is the same as that of the return cylinders, the balance cylinders and the return cylinders are arranged on the workbench diagonally, and the return cylinders are driven by a hydraulic power system. The balance cylinder is driven by a balance cylinder energy accumulator set, and the balance cylinder energy accumulator set is fixedly arranged on one side of the workbench. According to the utility model, the balance cylinder energy accumulator group device is additionally arranged on the hydraulic machine, so that the capacity of the hydraulic energy accumulator group can be effectively reduced, the heating and the energy consumption are greatly reduced, no vibration exists, and the stability and the safety of equipment can be improved; the balance cylinder hydraulic energy accumulator sets are designed in a modularized mode, multiple sets can be used in a matched mode, and meanwhile assembly and equipment maintenance are facilitated.

The utility model discloses a right-angle joint which comprises an elbow joint and an upper connecting pipe, an upper connecting port is arranged on the left side of the elbow joint, a lower connecting port is arranged at the bottom end of the elbow joint, the elbow joint is connected with the upper connecting pipe through the upper connecting port, and the elbow joint is connected with the lower connecting pipe through the lower connecting port. The right-angle connector is provided with the flow stabilizing blocks and the flow guiding grooves, the flow stabilizing blocks increase the thickness of the pipe wall at the fluid turning position, so that turbulent flow and vortex are reduced, the speed of fluid is reduced through the two sets of slopes, it can be ensured that the fluid stably passes through without generating violent vibration or pressure fluctuation, abrasion to the turning position of the inner wall of the elbow connector is reduced, and breakage is avoided; the sawtooth-shaped texture structures formed on the surfaces of the flow stabilizing blocks and the flow guide grooves can disperse fluid into a plurality of small flow channels, the kinetic energy of the fluid is effectively dispersed, vibration and noise in a pipeline system are reduced, and the problem that the stability of fluid passing is poor is solved.

The utility model relates to the technical field of 3D printing, and discloses an ultra-large type polymer composite 3D printer printing head heat dissipation device which comprises a positioning block fixedly connected to the side face of a printing head body, the side face of the positioning block is fixedly connected with an installation frame used for limiting, and fan blades used for heat dissipation are fixedly installed in the installation frame. And a balancing weight for limiting is fixedly mounted on the other side of the printing head main body. According to the ultra-large type polymer composite 3D printer printing head heat dissipation device, through cooperative arrangement of the mounting frame and the fan blades, air circulation and circulation in the printing head can be accelerated, so that the heat dissipation and cooling effects on the printing head can be achieved, and the problem that when a printer works for a long time, if heat cannot be effectively dissipated, the printing head cannot be cooled is solved. The situation that the printing quality is possibly reduced and even part of parts are damaged due to the fact that the fan blades are arranged on the fan blades is avoided, meanwhile, the fan blades can be limited more stably through the mounting frame, and it is guaranteed that the fan blades are more stable during working.

The invention discloses an integrated motor structure with a bidirectional power recovery function, which belongs to the field of permanent magnet synchronous motors and comprises a casing suite, and a motor casing integrated electric control junction box assembly is mounted on the casing suite. A motor through type output shaft is arranged at the position of a central shaft of the machine shell suite, and a plurality of sets of stator assemblies and rotor assemblies are arranged in the machine shell suite. The stator assembly is fixedly connected with the inner wall of the machine shell suite, a radial gap is formed between the stator assembly and the circumference of the motor through type output shaft, the rotor assemblies are fixedly arranged on the motor through type output shaft, and the wet brakes are arranged between the different rotor assemblies. The motor is compact in structure, small in size, light in weight, capable of providing larger torque output, capable of reducing loss energy, capable of improving efficiency and capable of achieving accurate speed and torque control. The device is fast in dynamic response, does not generate electromagnetic noise and vibration in the operation process, is relatively simple in structure, and is relatively long in service life and relatively high in reliability.

The invention discloses a head for an embroidery machine, comprising a head main shaft, a plurality of bearing seats, a balancing block, a cantilever body, a needle bar frame provided with a needle bar assembly, a presser foot assembly and a thread take-up rod assembly, a thread take-up rod transmission assembly, a needle bar transmission assembly and a presser foot transmission assembly. The head main shaft is arranged on the cantilever body through the bearing seat, a balancing block is arranged on the head main shaft, the front end of the cantilever body is provided with a needle bar frame through a slideway, the front end of the cantilever body is provided with a color-changing driving mechanism for driving the needle bar frame, the head main shaft drives the thread take-up rod transmission assembly, the needle bar transmission assembly and the presser foot transmission assembly. Compared with the prior art, vibration and noise can be reduced, the use is convenient, and the stability and work efficiency are improved.

The utility model discloses a flat seam rotary hook with assembled fastening structure, including shuttle bed, the inside assembly of shuttle bed is the shuttle frame of limit rotation, the outside installation of shuttle bed has the shuttle skin, the upper plane of shuttle bed is equipped with the moon circle for guiding sewing line, and the bottom plane of moon circle is fixedly connected with the upper plane of shuttle bed through fastener, the bottom end center position of shuttle bed is provided with the installation shaft hole, be provided with the flat seam opening of outside communication on the installation shaft hole, make the installation shaft hole of shuttle bed and the surface contact of installation shaft a circle, not only guarantee the installation of shuttle bed more fastening, also avoided the eccentric situation that appeared to fasten using multiple bolts of tradition, guarantee this rotary hook rotation more stable, will not appear the situation of vibration, the utility model discloses the moon circle of fixed installation with the shuttle bed plane, can guarantee the stable rotation of shuttle frame in the shuttle bed guide rail, and the noise produced in the rotation process will reduce greatly, can more increase the service life of rotary hook.

The utility model provides an out-of-ground pile flowmeter, which relates to the technical field of out-of-ground pile flowmeters and comprises a shell, the shell comprises a shell body, a top cover is arranged at the top of the shell body, a fixing ring is arranged in the shell body, a Hall element is arranged in the fixing ring, and an installation ring is fixedly installed in the middle of the outer side of the shell body. A through hole is formed in the surface of the mounting ring, an impeller part is arranged at the bottom of the shell and is of a hemispherical structure, a rotating shaft is fixedly mounted at the bottom of the impeller part, a rotating impeller is arranged in the impeller part and comprises an impeller body, and the rotating shaft is sleeved with the impeller body; the impeller body is rotationally connected with the rotating shaft, and the edge of the impeller body is in an arc shape. According to the impeller, when the water flow speed is large, the impeller body can rotate along the rotating shaft to be stable, vibration and noise are avoided, the service life can be prolonged, and high practical value is achieved.

This invention discloses a multi-axis planar motion platform suitable for vacuum environments, comprising: a vacuum chamber, a mounting top plate, an adjusting column, a motion stage, a support platform, a drive assembly, a secondary guide rail, a primary guide rail, and a primary slider. The vacuum chamber is a sealed cavity, with the mounting top plate positioned at the top inner side of the vacuum chamber. The support platform is a hollow square structure connected to the mounting top plate via the adjusting column. The motion stage and secondary guide rail are both located inside the support platform, while the drive assembly is located outside the support platform. The output end of the drive assembly is connected to the secondary guide rail, which extends horizontally through the inner side of the motion stage. Both ends of the secondary guide rail are connected to the primary slider, which slides on the primary guide rail. The primary guide rail is located at the edge of the support platform. Driven by the drive assembly, the secondary guide rail, primary slider, and primary guide rail cooperate to achieve relative sliding of the motion stage within the support platform along the X-axis or Y-axis. This invention has the advantages of compact structure, simple operation, and high motion accuracy.

The utility model discloses a handheld cold and hot compress beauty instrument, which comprises a main control chip, a TEC control circuit, a TEC module, a metal heat conduction head, a temperature sensor, a temperature sampling circuit, an LDO circuit, a rechargeable battery, a charging interface, an on-off key, a temperature rise key and a temperature drop key, one end of the TEC control circuit is electrically connected with the main control chip, and the other end of the TEC control circuit is electrically connected with the metal heat conduction head. The other end of the TEC control circuit is electrically connected with the TEC module, the rear end of the metal heat conduction head abuts against the TEC module, one end of the temperature sampling circuit is electrically connected with the main control chip, the other end of the temperature sampling circuit is electrically connected with the temperature sensor, the temperature sensor abuts against the metal heat conduction head, one end of the LDO circuit is electrically connected with the main control chip, and the other end of the LDO circuit is electrically connected with the metal heat conduction head. And the other end of the LDO circuit is electrically connected with the rechargeable battery. According to the technical scheme, the beauty instrument has the functions of hot compress and cold compress, the functionality of the beauty instrument is increased, and the beauty instrument is reliable in work, convenient to operate, rapid in refrigeration and heating, convenient in temperature adjustment, accurate in temperature control and high in practicability.

The utility model provides a humanoid bionic robot trunk based on stepping motor driving, which comprises a base, a supporting assembly is arranged on the surface of the base, a first rotating device is arranged above the supporting assembly, a third rotating device is arranged at the top of a fixing frame, and a stepping motor is arranged on the base. The rotating sleeve is arranged above the third gear and the fourth gears, the second rotating device is arranged between the positioning frame and the protective sleeve, the driving device is arranged above the protective sleeve, the arc-shaped sleeve is arranged between the protective sleeve and the driving device, and the arc-shaped sleeve is arranged above the arc-shaped sleeve. And the rotating frame is arranged above the arc-shaped sleeve. According to the humanoid bionic robot trunk based on stepping motor driving, the umbrella-shaped gear set structure is adopted in the movable neck, the service life of the structure is longer than that of an existing robot neck, and due to the fact that the structure is simple, control is more convenient, and manufacturing cost is low.

This invention discloses a multi-channel UAV pose perception system and method. The system includes a pose perception belt, a digital twin UAV attitude visual interface, and a UAV-side pose sensor. The pose perception belt includes a control unit, a wireless communication module, a vibration motor, a power supply module, and a belt frame. The UAV-side pose sensor collects UAV attitude data in real time and establishes an aerial attitude model of the UAV. The attitude data includes at least the angle and direction of UAV tilt. The angle of UAV tilt is defined as the tilt angle, which is the complementary angle γ between the UAV's XY plane and the ground. The direction of UAV tilt is defined as the drift angle, which is the angle α between the projection of gravitational acceleration on the UAV's XY plane and the X-axis. This invention significantly reduces the operator's cognitive load, enables rapid response to abnormal UAV attitudes, greatly shortens the operator's decision-making time, and reduces the risk of UAV loss of control, rollover, or crash.

The present application provides a planetary gear outer ring raceway device, which relates to the technical field of semiconductor processing equipment, and includes a pin gear ring and an outer ring seat; wherein: the pin gear ring is arranged around the outside of the machine tool worktable, and the pin gear ring rotates relative to the machine tool worktable with the center of the circle of the machine tool worktable as the rotation center; the outer ring seat is sleeved on the outside of the machine tool worktable, and the pin gear ring rotates on the top of the outer ring seat; the lower surface of the pin gear ring is provided with an upper raceway groove of an annular structure, and the upper surface of the outer ring seat is provided with a lower raceway groove of an annular structure, and the upper raceway groove and the lower raceway groove overlap to form an annular raceway, and a plurality of balls are installed in the annular raceway, and the balls can roll in the annular raceway. The defect in the related art that the planetary gear runs unsteadily or vibrates, resulting in a decrease in the grinding and polishing quality of the wafer, or even causing the wafer to be scrapped, is solved.

The utility model relates to the technical field of oilstone pressing, in particular to an oilstone follow-up pressing mechanism for a brake valve grinding miller, which comprises a mounting table, a linear electric sliding table, a pull rod and an oilstone, the linear electric sliding table is arranged on the mounting table, the moving end of the linear electric sliding table is connected with one end of the pull rod, and the other end of the pull rod is connected with one end of the oilstone. The oilstone is driven by the linear electric sliding table to do linear reciprocating motion; the stone pressing frame is arranged on the mounting table, the stone pressing lead screw is rotationally arranged on the stone pressing frame, the stone pressing motor is arranged on the stone pressing frame and is in transmission connection with one end of the stone pressing lead screw, the stone pressing sliding seat is arranged on the stone pressing lead screw, the stone pressing connecting plate is fixed to the stone pressing sliding seat, and one side of the stone pressing rod is fixed to the stone pressing connecting plate. And the stone pressing rollers are arranged at the inner ends of the stone pressing rods. The stone pressing rod and the oilstone can do linear reciprocating motion synchronously, it is guaranteed that the stone pressing rod abuts against the middle of the oilstone, and the oilstone is evenly stressed.

The invention relates to a shock-free disc brake for a passenger car. The biggest difference between the shock-free disc brake and an existing caliper disc brake is in structural mechanical characteristics, the shock-free disc brake adopts couple braking, and the existing caliper disc brake adopts torque braking, so that the shock-free disc brake always has tangential force, and the specific structure is as follows: two to four sets of brake pads are completely symmetrically and uniformly distributed on the shock-free disc brake by taking a brake disc rotation center as a center; the caliper disc brake is only provided with a set of brake pads which are arranged on one side of the rotation center of the brake disc in an offset mode, and the use effects are shown as follows: even if parts such as a pin hole are large in clearance and low in precision, the vibration-free disc brake is still free of vibration and noise during braking all the time, and after the caliper disc brake is used for a period of time (or low in precision), due to the fact that the clearance of the parts is increased, the brake pad cannot be damaged. Vibration and noise can be generated during braking. The problem is not solved in the world so far, the root of the problem is torque braking instead of couple braking on the aspect of structural mechanical characteristics, and a hard knot must be formed.

The utility model relates to the technical field of dashboards, in particular to an automobile dashboard with good stability, which comprises a dashboard main body, a central control mounting port for mounting a central control mounting piece is arranged in the middle of the front end face of the dashboard main body, and mounting bayonets are uniformly arranged on the inner circumferential wall of the central control mounting port. A positioning block is arranged in the middle of the interior of the mounting bayonet, a positioning groove is formed in one end of the positioning block, a positioning column is arranged on the rear end face of the center control mounting part, interval spaces are reserved between the upper end face and the lower end face of the positioning column and the inner wall of the mounting bayonet, and clamping parts matched with the interval spaces are arranged above and below the positioning column. The rear end face of the instrument desk body is provided with a fastening piece enabling the clamping piece to be tightly attached to the inner wall of the installation bayonet, one end of the fastening piece abuts against the positioning block, the other end of the fastening piece abuts against the clamping piece, and the fastening piece is limited by the positioning block and exerts pressing force on the clamping piece. And vibration and abnormal sound are avoided.

According to some embodiments of the present disclosure, an optical coupling device is disclosed. The optical coupling device is a device for transmitting an optical signal from a static signal path to a rotating signal path, and the optical coupling device includes: a fixed unit, the fixed unit includes a first optical path, the first optical path has an optical terminal oriented in a downstream direction; a rotating unit, the rotating unit includes a rotational motion source and has a second optical path - the second optical path includes a first end and a second end, the first end is oriented toward the position where the optical terminal is located, and the second end is oriented toward the position where the downstream rotating optical path is located; and a connecting unit, the connecting unit provides a connection between the rotating unit and the downstream rotating optical path.

The utility model relates to lithium battery diaphragm unwinding equipment, in particular to a supporting device. The supporting device is used for supporting a diaphragm roller and comprises a fixing seat, a supporting part and an adjusting mechanism, the supporting part is movably arranged on the fixing seat and provided with a groove matched with the peripheral shape of the roller, the adjusting mechanism is connected with the fixing seat, and the fixing seat is connected with the supporting part. And the adjusting mechanism is used for adjusting a gap between the supporting part and the roller. According to the scheme provided by the utility model, the height of the supporting part can be adjusted through the adjusting mechanism, so that a certain gap exists between the supporting part and the roller, rubber powder generated by scraping between the supporting part and the roller in the diaphragm winding process can be avoided, the roller can be supported through the supporting part when the diaphragm is wound, and the winding efficiency of the diaphragm is improved. And operators can conveniently stop the machine to replace the roller.

This invention discloses an ultra-narrow linewidth Littman tunable laser, comprising a semiconductor laser diode, a collimating lens, a blazed grating, and a tuning mirror arranged sequentially with an adjustable angle opposite to the grating plane of the blazed grating. The semiconductor laser diode, collimating lens, and blazed grating are located on the same optical axis, and the grating plane of the blazed grating intersects the optical axis. It also includes an adjustable-cavity F-P etalon, located in the output path of the zero-order diffracted light from the blazed grating. The zero-order diffracted light is output as laser light after passing through the F-P etalon. This allows the semiconductor laser diode, collimating lens, blazed grating, and tuning mirror to form a standard Littman tunable laser. By adding an adjustable-cavity F-P etalon, the narrowband filtering characteristics of the F-P etalon can be matched to the output wavelength of the semiconductor laser diode by adjusting the cavity pitch of the F-P etalon.

The utility model relates to the technical field of crystal processing devices, and discloses a large-size crystal processing device which comprises an equipment box, a protective door is movably connected to the front face of the equipment box, sanders are fixedly connected to the two sides of the equipment box, and a water storage tank is fixedly connected to the rear end of the bottom of the equipment box. A placing plate is fixedly connected to the bottom of the equipment box, a top plate is fixedly connected to the top of the equipment box, and a movable groove is formed in the top of the top plate, so that it can be ensured that a crystal cannot move or vibrate in the machining process through stable clamping, and therefore it is ensured that the relative position of a polisher and the surface of the crystal is constant; according to the crystal dust removal device, the machining precision is improved, crystal dust can be captured through water mist sprayed out of the atomization nozzles, the dust removal purpose is achieved, meanwhile, the crystal dust can be effectively collected through the containing plate and the dirt storage box, and the working intensity is reduced while the damage of the dust to the human body is reduced.

The invention relates to the technical field of shock absorbers, in particular to modular non-standard automation equipment which comprises an equipment body, a plurality of shock absorbers are arranged at the bottom of the equipment body, each shock absorber comprises an upper supporting plate and a lower supporting plate, and a limiting cylinder is arranged between each upper supporting plate and the corresponding lower supporting plate; the limiting cylinder comprises an upper limiting cylinder and a lower limiting cylinder, a plurality of damping springs extending in the vertical direction are rotationally arranged in the limiting cylinder, the damping springs are evenly distributed around the axis of the upper limiting cylinder, an elastic adjusting base is arranged at the bottom of each damping spring, and the lower limiting cylinder is in transmission connection with the elastic adjusting bases at the same time; the shock absorber comprises a first driving mechanism, the first driving mechanism enables an upper limiting cylinder and a lower limiting cylinder to rotate at different rotating speeds, the rotation of the lower limiting cylinder can drive a plurality of elastic force adjusting seats to rotate around the vertical axis, then a plurality of shock absorbing springs are driven to rotate around the vertical axis, and the service life of the shock absorber is prolonged.

The invention discloses a box type three-motor mini-tiller which comprises a chassis which is of a split structure and is provided with a battery box and a motor box. The rack adopts a channel steel design; the three motors independently control advancing and differential steering of the wheels and speed adjustment and directional communication maintenance of the rotary blades respectively. The two wheels are respectively driven by two motors; the wheels are connected in a half-shaft mode, a half shaft is supported through a bearing chamber, and the half shaft is matched with an output shaft of the motor and then matched with wheel hubs to transmit power. The motor is large in starting torque, high in overload capacity and capable of adapting to sudden change of working loads; the speed regulation range is wide, the torque control characteristic is good, the speed is regulated through keys, and the operation is simple; the concentricity of the motor is good, vibration caused by combustion pulse of a crank-link mechanism of a fuel engine and mixed gas in a cylinder is avoided, and vibration of the mini-tiller is greatly reduced; and electric energy is used as a power source, so that no pollution, zero emission and high energy utilization rate are realized.

This invention discloses a soil sampling cylinder, a soil sampler, and a soil sampling method, relating to the field of geological exploration technology. The invention includes a cutting blade, which is a hollow cylinder with a straight inner and outwardly inclined circular cutting edge at the front end, and a threaded connection at the rear end to a steel cylinder. The inner wall of the steel cylinder is stacked with ring cutters whose inner diameter matches that of the cutting blade. An anchor rod is fixedly installed on the lower surface of a pad, and the upper surface is fixedly connected to a horizontal adjustment component. The horizontal adjustment component is fixedly connected to an equipment box, and a guide sleeve is installed at the center of the equipment box. Guide grooves are evenly spaced around the guide sleeve, and a guide limiting component is slidably installed within the guide grooves. The equipment box is threadedly connected to the steel cylinder via a vertical pressure component. This invention provides a soil sampling cylinder, a soil sampler, and a soil sampling method, featuring automatic horizontal calibration, guide limiting, static pressure undisturbed sampling, and digital traceability of samples. It also significantly reduces the cost and material requirements of the cutting blade, laying the foundation for cost reduction and efficiency improvement.

The utility model discloses a mechanism for realizing jig jacking and positioning, which comprises a base, a sliding plate capable of vertically reciprocating is arranged on the base, a positioning structure for realizing jig positioning is arranged on the sliding plate, and a jig is placed on the sliding plate and can synchronously move along with the sliding plate to realize jig jacking and positioning. According to the mechanism for achieving jacking and positioning of the jig, the boss shaft on the jig falls into the V-shaped positioning groove in the jacking and positioning process, high-precision positioning of the jig can be achieved through the design of the V-shaped positioning groove, the V-shaped positioning groove can be changed according to the specification of the jig, meanwhile, the linear guide rail is adopted for vertical guiding, the gap is small, stability is high, and the positioning accuracy is high. Compared with an existing linear bearing and guide shaft design, the jig has the advantages that the jig is free of dislocation and vibration in the whole positioning process, it is guaranteed that parts on the jig can be accurately taken, placed and assembled by other auxiliary mechanisms, the working efficiency and quality are remarkably improved, and meanwhile the problems that an existing jig shakes and the product yield is low are solved.

The invention discloses a hydrogen fuel cell all-terrain vehicle which comprises a vehicle frame, a power system, a power cell and a hydrogen fuel cell system, the hydrogen fuel cell system comprises a hydrogen fuel stack, a hydrogen fuel stack controller, a hydrogen fuel cell direct current transformer and a hydrogen storage device, and the hydrogen fuel stack is used for converting hydrogen into electric energy; the hydrogen storage device is used for supplying hydrogen to the hydrogen fuel stack, the hydrogen fuel stack controller is used for controlling the hydrogen fuel stack, the hydrogen fuel cell direct-current transformer is used for rectifying electric energy generated by the hydrogen fuel stack to supply power to the power system, and the hydrogen energy fuel cell system generates electric energy. Electric energy is transmitted to the power battery through the hydrogen fuel cell direct-current transformer, the power battery provides power for the vehicle through the power system, during starting, the response is rapid, almost no delay exists, jerking during gear shifting and engine vibration do not exist during driving, driving is smooth, no gasoline smell exists, and the driving comfort is qualitatively improved.

The invention discloses a bidirectional DC-DC charging and discharging module, and relates to the technical field of DC-DC charging and discharging modules. The module comprises a module mounting substrate, on which a voltage stabilizing circuit module and a bidirectional DC-DC conversion element for intelligent voltage regulation are welded and fixed, a heat dissipation base is provided below the bottom of the module mounting substrate, a plurality of grooves are provided on the heat dissipation base, and the plurality of grooves are distributed in a linear array, a fixing groove connected to the bottom of the groove is further provided inside the heat dissipation base, a heat conducting sheet is embedded in the fixing groove, the bottom of the module mounting substrate is on the heat dissipation base and contacts the top of the heat conducting sheet, and a flow guide component is provided inside the groove; the invention drives a contact cooling structure to produce a flow effect through a designed flow guide component, so that a coolant contacts the module mounting substrate, thereby absorbing the heat generated by electronic components on the module mounting substrate, achieving a uniform heat dissipation effect, and having a good heat dissipation effect and being stable without vibration.