5386results about How to "Compact structure" patented technology

The invention discloses a pallet protection corner automatic putting machine. The pallet protection corner automatic putting machine comprises a top protection corner putting combination machine and aside face protection corner putting combination machine; the top protection corner putting combination machine comprises a bottom circulation base and a pair of top protection corner single machines,the side face protection corner putting combination machine comprises a bottom fixed base and four side face protection corner single machines, the top face protection corner single machines are provided with electrical control parts, top protection corner containing grooves, limiting mechanisms, and top protection corner mounting claws, the top protection corner mounting claws grab protection corners in the top protection corner containing grooves, and put the protection corners on four edges of the top of a packaging box, each side face protection corner single machine comprises a second electrical control part, a side protection corner containing groove, and a side protection corner mounting claw, and the side protection corner mounting claws grab the protection corners in the side protection corner mounting grooves and put the protection corners on the four sides of the side face of the packaging box. The pallet protection corner automatic putting machine is reasonable in layout,smooth in operation, high in adaptation, automatic in full process, free of artificial duty and capable of greatly improving protection corner putting and threading packaging capacity.

The invention belongs to the technical field of power station boiler waste heat recycling energy-saving equipment and relates to a plate-and-shell type coal economizer. The plate-and-shell type coal economizer comprises a corrugated plate heat exchange core body (1), a heat exchanger shell (2), a first and a second water inlet / outlet water tank (3, 3') and a first and a second exhaust gas inlet / outlet pipeline (4, 4'), wherein the corrugated plate heat exchange core body (1) is mounted in the heat exchanger shell (2), the first and second water inlet / outlet water tanks (3, 3') are respectively arranged at the upper and lower ends of the front side of the corrugated plate heat exchange core body (1), and the first and second exhaust gas inlet / outlet pipelines (4, 4') are respectively arranged at the upper and lower sides of the corrugated plate heat exchange core body (1). The plate-and-shell type coal economizer solves the problem that the length of a water passage needs to be increased to solve the problem of unapparent water heating due to the great difference between an exhaust gas density and a water density, and meanwhile, a corrugated passage at the exhaust gas side enables the exhaust gas flow turbulivity to be increased and the heat transfer efficiency to be improved; the blockage due to ash accumulation happens rarely, even if the ash is accumulated, the cleaning is easy to finish.

The invention discloses an electric power distribution method convenient for maintenance. By arranging a second threaded column (21) and an extrusion plate (22), when the second threaded column (21) rotates, the extrusion plate (22) can be driven to rotate, then the extrusion plate (22) can drive a friction pad (27) to rotate, and when the friction pad (27) is connected with the lower surface of the inner wall of a shell (1) in a lap joint mode, a support plate (17) can be fixed; and by arranging a stop block (28), when the back face of a second protection plate (10) is connected with the front face of the stop block (28) in a lap joint mode, a first threaded column (13) can be more conveniently connected with a second threaded sleeve (14), and therefore the second protection plate (10) can be better fixed. The electric power distribution method convenient for maintenance has the advantages that the structure is compact, the design is reasonable, and the practicability is high.

The invention discloses a light aging test instrument, which includes a test cavity, a bottom baseplate, the top cover board which is fixed on the bottom and the top of the test cavity respectively. A lamp socket which fitted with a lamp is right on the centre of the base plate, the photo permeable holes are set at the same height on the side wall of the test cavity. A visual light narrow wave band filter sheet is in the photo permeable hole, and the sample trough is fitted on the photo permeable hole. The test instrument has a compact structure, easy to disassemble and assemble, inflexible for employ, with low cost of the production.

The invention relates to a gas nano purifier. The gas nano purifier comprises a mounting seat, the gas storage bin is installed on the installation base and used for storing clean gas, the side wall of the upper portion of the gas storage bin extends upwards to form an installation plate, and a gas path through hole is formed in the middle of the installation plate; the gas-water separator is mounted on the mounting plate and is used for carrying out primary purification on to-be-cleaned gas; the adsorption tower is mounted on the mounting plate and is used for carrying out secondary purification on the to-be-cleaned gas; gas to be cleaned sequentially flows through the gas-water separator and the adsorption tower and then enters the gas storage bin; the adsorption tower is communicated with the gas storage bin through an exhaust pipe; and the exhaust pipe penetrates through the gas path through hole. Through the arrangement, the installation operation is greatly simplified, and the integrity and the space utilization rate of equipment are improved.

The invention relates to the technical field of drying, and discloses a solar heat collection tube heating and drying device and a tube row manufacturing method thereof.The solar heat collection tube heating and drying device comprises a first rack, and a first heat collection module is arranged on an inclined mounting platform formed by a first-stage step and a second-stage step of the first rack; a drying cavity defined by first steel plates is installed on the outer wall of the three-stage step of the first rack, and a first partition plate is arranged in the drying cavity. A second partition is arranged on the top surface of the first partition, a third partition is arranged on the side wall of the second partition, and an air delivery pipe is arranged between the third partition and the first partition; an air inlet shutter is mounted on the first steel plate, a fan opposite to the air inlet shutter is mounted on the second partition plate, and an exhaust shutter is mounted on the first steel plate; a supporting beam located above the third partition plate is arranged on the first rack, a footstand is arranged on the supporting beam, and a drying bin used for drying corn is placed on the footstand; according to the device, the solar energy utilization rate is increased through the heat collection structure, heat collection and drying chambers are reasonably partitioned, the airflow circulation path is clear, and stable drying of corn is achieved.

The utility model discloses an automatic clamping corner device for a pipe bending machine, which comprises a fixing plate, a die-in fixing seat arranged on the fixing plate through a left-right sliding device, a corner seat arranged on the die-in fixing seat through an up-down sliding device, a rotating die arranged on the corner seat through a rotating device, and a clamping device arranged on the rotating die. The rotating die can rotate relative to the center line of the rotating die through the rotating device; a clamping groove is inwards formed in the circumference of the rotary die, and the position of the clamping groove ensures that the center line of a pipe is overlapped with the center line of the rotary die when the pipe is placed at the bottom of the clamping groove; and a pipe clamping die assembly for clamping the pipe to abut against the bottom of the clamping groove is arranged on the corner seat. The device is arranged near a pipe bending wheel module on the pipe bending machine, assists the pipe bending wheel module in pipe bending, is simple and compact in structure and small in occupied space, can accurately guarantee the rotating angle of a pipe, and greatly improves the percent of pass of products.

The utility model discloses a gearbox for an oil-electricity double-engine ship. The gearbox comprises a box body, the diesel oil input component comprises a first input shaft, a first driving gear is sleeved on the first input shaft, and the first input shaft is provided with a first transmission gear and a first clutch; the reversing shaft part comprises a reversing shaft, a second driving gear is sleeved on the reversing shaft, the reversing shaft is provided with a second transmission gear and a second clutch, and the second transmission gear is meshed with the first transmission gear; the motor input component comprises a second input shaft, the second input shaft is sleeved with a third driving gear in an empty mode, the third driving gear is meshed with a first driven gear, the second driving gear is fixedly sleeved with the first driven gear, and the second input shaft is provided with a third clutch; the output shaft component comprises an output shaft and a second driven gear, and the second driven gear is meshed with the first driving gear and the second driving gear. According to the scheme, the diesel engine or the motor is independently used for driving, intelligent switching of the diesel engine and the motor can be achieved at any speed, oil consumption is reduced, and power performance is improved.

The invention relates to the technical field of slope disaster monitoring, in particular to a high and steep slope geological disaster monitoring method and system based on multi-source data fusion. The method comprises the following steps: tracking surface deformation through PS-InSAR time sequence analysis and atmospheric phase correction to obtain surface deformation characteristics; identifying the apparent diseases of the slope, and extracting spatial and temporal distribution characteristics of the apparent diseases of the slope; analyzing spatio-temporal evolution characteristics under geologic structure constraints by utilizing slope rock mass structure characteristics and the earth surface deformation characteristics; according to underground water level dynamic and potential sliding surface weakening features and the slope apparent disease spatial and temporal distribution features, extracting disaster-causing key factor features after cooperative correction; and combining the disaster-causing key factor characteristics, the true three-dimensional geological environment background characteristics and the spatio-temporal evolution characteristics to analyze the comprehensive early warning grade and the potential instability mode of the landslide. Scientific support is provided for high and steep slope geological disaster prevention and control, and engineering construction and operation safety can be guaranteed.

The invention discloses a high-efficiency converter for adjusting the voltage of a power grid, and belongs to the technical field of power electronics. The converter comprises a first voltage regulation circuit, a second voltage regulation circuit, a filter circuit, a detection circuit and a control circuit. By detecting the amplitude difference between the power grid voltage and the load voltage, the control circuit automatically switches the Buck working mode or the Boost working mode, and stable alternating current output in a wide input voltage range is achieved. The invention has the advantages of compact structure, high efficiency, fast response, small harmonic wave and the like, and is suitable for industrial and civil occasions with large-range fluctuation and frequent power grid voltage.

The invention relates to the technical field of automobile part machining, and discloses an automobile part multi-station synchronous clamping and positioning device which comprises a support, a vertical plate is fixedly arranged in the middle of the support, the vertical plate is slidably connected with a plurality of sliding plates, a sliding seat is fixedly arranged on one side of each sliding plate, a baffle is arranged on one side of each sliding seat, and the baffle is fixedly connected with the support. Two sliding rods in sliding connection with the sliding seat are fixedly arranged on one side of the baffle, the surfaces of the sliding rods are sleeved with springs, and a first clamping plate is fixedly arranged at one end of each sliding rod; the single air cylinder drives the cross beam to synchronously push all the sliding plates, synchronous clamping of workpieces at multiple stations is achieved, the auxiliary clamping time is greatly shortened, the production efficiency is improved, the consistency of clamping actions of all the stations is guaranteed, and the problem of workpiece deformation or displacement caused by uneven clamping force is solved.

The utility model discloses a material conveying mechanism for laser welding. The material conveying mechanism comprises an adjusting clamp set, a driving motor and a conveying assembly. The adjusting clamp set comprises a fixed seat, a guide seat, a first clamping flap and a second clamping flap, and the guide seat is in sliding connection with the clamping flaps through guide pins and used for driving the clamping flaps to be opened and closed and adjusting the clamping distance; the driving motor comprises a driving motor body and a lead screw, the lead screw is sleeved with the guide base through a screw hole, and automatic adjustment of the clamping structure is achieved; the conveying assembly comprises peristaltic petals installed at the ends of the clamping petals and eccentric wheels, the eccentric wheels are driven by the output shaft sleeve to rotate, and materials are clamped and conveyed in a peristaltic mode. The mechanism can realize self-adaptive clamping and stable propelling of welding materials with different specifications, has the advantages of compact structure, stable transmission, high universality and the like, and is suitable for material precision conveying requirements in automatic laser welding equipment.

The invention discloses a co-phase error detection system and method based on broadband spectrum synchronous phase-shifting interference. The system comprises an optical path adaptation module, a broadband synchronous phase shift module, a dispersion compensation module, a tilt error detection module and a large dynamic range accurate measurement module. The method comprises the following steps: firstly, carrying out polarization modulation on a broadband light source; performing synchronous phase shift on the interferogram by using a broadband achromatic wave plate, a light splitting prism and a polarization beam splitter, and obtaining four interference fringes by using a single sensor; and then a mass center measurement device and a dispersion device are combined, and a four-step phase-shifting interference measurement method and a multi-wavelength interference spectrum are combined, so that the purposes of wide-range and high-precision measurement of the optical path difference of the two arms can be achieved, and co-phase error measurement of wavefront phases in the two arms is realized. The contradiction between the dynamic range and the precision in the prior art is solved, and the system is compact in structure, high in anti-disturbance capacity, capable of being in seamless joint with an existing optical system and high in engineering landing performance.

The invention discloses an ion trap mass spectrometry device and method capable of switching internal and external ion sources, and the device comprises an ion source cavity, the exterior of the ion source cavity is provided with a heating module, the side wall of the ion source cavity is provided with a sample introduction hole, and the sample introduction hole is internally provided with a chromatographic column I; the electron beam generation system is arranged at the front side position of the ion source cavity; the insulation connecting piece is communicated with the ion source cavity, and a lens I, a lens II and a lens III are sequentially arranged in the insulation connecting piece in the sample injection direction; a signal acquisition system; wherein a chromatographic column II is arranged on the ion trap. The two ionization modes inside and outside the trap are integrated, and different detection requirements can be flexibly met by switching the sample introduction path of the chromatographic column and regulating and controlling the voltage parameters of the lens I, the lens II and the lens III.

The invention relates to the technical field of pet supplies, and particularly discloses a pet water dispenser. The pet water dispenser comprises a shell, a drinking tray assembly, a driving piece and an overturning transmission mechanism. The drinking tray assembly is installed on the shell through a rotating shaft on the side portion, the overturning transmission mechanism comprises a driving sliding block driven by a driving piece and a contour surface arranged on the drinking tray assembly, and the drinking tray assembly is driven to automatically overturn around the rotating shaft to pour sewage through cooperation of the sliding block and the contour surface. A locking mechanism is further arranged, automatic locking is achieved when the rotating shaft is installed in place, and axial loosening of the assembly is prevented. The water dispenser is simple and compact in structure, high in automation degree and reliable in work, and the use safety and convenience are effectively improved.

The utility model discloses an optical module test system which comprises a rack, a mechanical arm is arranged on the rack, and a feeding station, a code scanning station, an end inspection station, a plugging station, a test station and a discharging station are arranged on the periphery of the mechanical arm. The plugging station is used for connecting or separating the optical module and the optical fiber; the code scanning station is used for identifying and acquiring information of the optical module; an end detector is arranged on the end detection station; a high and low temperature detector is arranged on the test station; the manipulator is arranged to transfer materials among the stations, automation of the optical module testing process is achieved, manual operation is reduced, testing efficiency and accuracy are improved, and labor cost and personal errors are reduced. In addition, all the stations are arranged around the manipulator, the structure is compact, the occupied space is small, the system is particularly suitable for use scenes with high requirements for the site and the occupied area, meanwhile, operation of the manipulator and circulation of materials are facilitated, and the operation efficiency of the system is improved.

The invention relates to the technical field of lasers, and provides a double-gain-medium Q-switched laser and a constant-power pulse width adjusting method.The laser comprises a first pumping source, a second pumping source, an optical fiber beam combiner, a beam shaping system and a laser resonant cavity, the laser resonant cavity comprises a reflecting mirror, a first gain medium, a second gain medium, a polarization selector, a quarter-wave plate, a Q switch and an output mirror which are arranged in sequence; the first gain medium is used for absorbing first pumping light, the second gain medium is used for absorbing second pumping light, and the pumping power of the first pumping source and the pumping power of the second pumping source can be independently controlled. By changing the pumping power of the two pumping sources, real-time adjustment of the pulse width of the laser under the constant output power is achieved, the structure is compact, and control is easy and convenient.

The invention relates to the technical field of rock mechanics and intelligent detection, in particular to a rock strength and failure mode prediction method and system. The method comprises the following steps: acquiring data of a rock sample to be detected to obtain a multi-source feature set; constructing a feature coefficient prediction model, and inputting the multi-source feature set into the feature coefficient prediction model to obtain a feature coefficient; screening the multi-source feature set based on the feature coefficient to obtain an optimal feature subset; constructing a rock strength and failure mode prediction model, and optimizing hyper-parameters of the rock strength and failure mode prediction model by adopting an automatic hyper-parameter optimization framework; and inputting the optimal feature subset into the optimized rock strength and failure mode prediction model to obtain a rock strength prediction value and a failure mode. The problem that rock strength and failure mode prediction precision is not accurate enough and cannot be predicted at the same time in the prior art is solved, and the prediction precision is greatly improved through multi-source data collaborative prediction.

A reciprocating type aluminum profile line brushing module is characterized in that a line brushing module body is installed on a rack according to the surface of a profile needing line brushing, and the position of the line brushing module body is set according to the profile path position of a profile conveying mechanism; the brush wheel motor is installed on the horizontal base plate, the two side edges of the horizontal base plate are guided and limited through the horizontal guide wheels, the horizontal base plate is connected with one end of the adjustable push rod through the universal ball head, the other end of the adjustable push rod is fixedly connected with the end face of the eccentric wheel mechanism, and the eccentric wheel mechanism is driven by the reciprocating motor. The module is installed on the machine frame of the grain brushing machine and arranged according to the face, needing grain brushing, of an aluminum profile, installation and detachment are flexible, the structure is compact, and the module has the reciprocating motion function and is convenient to adjust.

The invention relates to the technical field of underground building foundation reinforcement and leakage prevention, in particular to an underground building foundation reinforcement and leakage prevention integrated device and method.The device comprises a movable rack, and a jolt ramming mechanism and an air drying mechanism are installed on the movable rack; the primarily-coated coating is impacted and compacted through the first compaction block and the second compaction block, the waterproof coating is powerfully pressed into holes in the inner wall of the foundation pit, a deeply-fused tight bonding layer is formed, and the interface bonding force and adhesive force between the waterproof coating and the inner wall of the foundation pit are greatly enhanced in the process; and the defect of insufficient bonding strength in the prior art is effectively overcome, so that the phenomena of peeling, cracking and overall falling of the waterproof coating in the later period are fundamentally prevented.

The invention discloses an ultra-wideband multi-system combining platform containing an NR4.9 G frequency band. The combining platform comprises a front-stage combining module, a higher harmonic suppression filtering module and a final-stage combining module, wherein the pre-stage combining module is a common multi-system combining platform and covers 2G, 3G and 4G system signals of mobile communication, and the frequency band is 698-2400HMz; the higher harmonic suppression filtering module is used for frequency selection of the working frequency band of 698-2400MHz of the preceding-stage combining system and suppression of higher harmonics and clutters within the frequency band bandwidth of 2500-5000MHz; the final-stage combining module adopts a hierarchical combining design, NR2.6 G, NR3.5 G and a higher harmonic suppression filtering unit are used as a first stage, NR4.9 G is used as a second stage, the working frequency of the final-stage combining module covers 2515-2515-4960 MHz, and the final-stage combining module comprises a mobile NR4.9 G system. The system has the advantages that existing 2G, 3G, 4G and 5G system frequency bands and an NR4.9G system are integrated and applied to wireless public network coverage, and co-construction and sharing of existing resources within the working frequency band of 698-4960 MHz are achieved.

The application relates to the technical field of liquid chromatography tandem mass spectrometry all-in-one machines, in particular to a high-performance liquid chromatography tandem mass spectrometry all-in-one machine which comprises a bottle box, the top of the bottle box is used for placing a solvent bottle, a fixing clamping plate for limiting the solvent bottle is arranged on the bottle box, a side edge buckle slot is formed in the side edge of the bottle box, a refrigeration box is arranged in the side edge cooling box, an intelligent control screen is mounted on the surface of the refrigeration box, a pull-out box is connected to the side edge cooling box through a pull-out slot, and a box handle is arranged on the pull-out box. On the sample management, the refrigeration box in the side edge cooling box cooperates with the intelligent control screen to realize intelligent temperature control, the influence of manual operation on the refrigeration environment is avoided, the arc-shaped clamping groove, the rubber pad and the compression spring structure in the pull-out box can stably clamp a test tube, the sample pollution risk is reduced, the detection precision is improved, and meanwhile, the detachable connection design of the fixing clamping plate enhances the use flexibility of the equipment.

The utility model provides a kind of feeding system of sewing machine, belong to sewing machine technical field.It solves the technical problems such as the additional driving source required by existing cloth feeding mechanism, complex structure, poor synchronism of cloth feeding and needle action.The feeding system of this sewing machine includes driving shaft, needle feeding assembly and cloth feeding assembly, driving shaft is rotatably installed on head, driving member for driving driving shaft reciprocating rotation is arranged in head, needle feeding assembly and cloth feeding assembly are connected with driving shaft, when needle of needle feeding assembly is under cloth, cloth feeding assembly stops cloth feeding, after needle of needle feeding assembly moves up and separates from cloth, cloth feeding assembly starts cloth feeding, cloth feeding assembly is connected with driving shaft by transmission assembly.The utility model drives needle feeding assembly and cloth feeding assembly simultaneously by setting single driving shaft, realizes the accurate synchronization of needle action and cloth feeding action.

The utility model relates to a self -cleaning formula epoxy resin adds stirring equipment and belongs to the technical field of stirring equipment, it is through the main agent and curing agent storage jar of shunt arrangement, and utilizes pumping pipeline respectively to two alternate operation's stirring jar feed, each stirring jar is after stirring and is arranged by spraying pump and optional access valve group, after production, by injecting cleaning agent to the raw material jar, can clean all material pipeline and is arranged by the external discharge port, realizes the function of efficient continuous production and convenient self -cleaning.

This utility model relates to the field of children's stroller technology and provides a children's stroller bassinet locking mechanism, including a front armrest seat, a front frame, a rear frame, an unlocking component, a gear, and a fixing seat. The fixing seat is hinged to the rear frame, front frame, and front armrest seat at the same center. The gear is located between the rear frame and the fixing seat and can slide inside. In this utility model, a reliable mechanical locking is achieved by setting a sliding gear between the rear frame and the fixing seat. The inclined surface fit structure between the unlocking component and the gear makes the unlocking process smooth and stable. Unlocking can be completed by a one-way sliding action, which is easy to operate. The fixing seat, front frame, rear frame, and front armrest seat share the same central hinge point, reducing the number of parts and making the structure more compact. This design not only improves the overall strength but also maintains the stability of the frame posture during locking and unlocking. The mechanism can be hidden inside the frame to avoid external interference, and it has good aesthetics and safety.

The application relates to the technical field of bulk drug synthesis, and particularly discloses a sealing structure of a bulk drug synthesis reactor, which comprises a reaction cylinder, a cover plate and a dosing cylinder, the bottom of the reaction cylinder is provided with a liquid outlet pipe, a switch valve is arranged on the liquid outlet pipe; the cover plate is connected to the top of the reaction cylinder through a locking assembly, a liquid inlet pipe is arranged on the cover plate in the vertical direction, the dosing cylinder is rotatably connected to the liquid inlet pipe in the horizontal direction, the outer diameter of the dosing cylinder is larger than the inner diameter of the liquid inlet pipe, a containing cavity is arranged in the dosing cylinder, liquid inlet holes for communicating the containing cavity are arranged on the peripheral wall of the dosing cylinder, and a rotating assembly for driving the dosing cylinder to rotate is arranged on the cover plate. The application has the effect of improving the problem that the cavity in the container is in communication with the external environment during the adding process of the additive, the internal environment of the reactor is changed, the reaction effect is affected, and the quality of the medicine is affected.

The application discloses a heat exchange module, a plurality of plates of a first heat exchanger include a top plate located at the outermost side in the thickness direction of the first heat exchanger; a first flow channel, a second flow channel and a first communication hole channel are isolated from each other in the first heat exchanger, the first communication hole channel penetrates through both sides of the first heat exchanger along the thickness direction of the first heat exchanger; a fitting is located on the side of the top plate away from other plates and is fixed with the top plate, the fitting has a first interface and a second interface, the first interface and the second interface can be communicated through the inner cavity of the fitting, the first interface can be communicated with the first communication hole channel, and the second interface can be communicated with the first flow channel. In the application, the first communication hole channel is used, the communication between other components located on the side of the first heat exchanger away from the top plate and the fitting can be realized, the fitting is installed on the top plate, the pipeline can be shortened or cancelled, so that the structure of the heat exchange device is relatively compact, and the miniaturization is beneficial. The application also provides a heat management system beneficial to miniaturization.

This invention belongs to the field of microwave communication technology, specifically relating to a PIFA antenna for 5G dual-band coverage. The invention includes a rectangular metal patch on a top surface, a substrate, and a metal ground plane stacked from top to bottom. A row of grounding vias is disposed through the substrate, and this array of grounding vias is located at the lower end of one side of the rectangular metal patch on the top surface. A coaxial feeding structure is disposed below the rectangular metal patch on the top surface. The antenna excites its fundamental mode TM through the coaxial feeding structure. 0.5,0 Mode and three higher-order modes TM 0.5,1 Pattern, TM 0.5,2 Pattern, and TM 0.5,3 The pattern includes a rectangular metal patch on the upper surface with a first slot along its vertical center line; the first slot has an opening on the side furthest from the grounding via for adjusting the TM. 0.5,1 Pattern and TM 0.5,3 The resonant frequency of the mode; a pair of second slits are orthogonally arranged on both sides of the first slit; the second slits are used to modulate the TM. 0.5,0 Pattern and TM 0.5,2 The resonant frequency of the mode. The antenna design proposed in this invention has advantages such as simple structure, relatively wide dual-band coverage, small size, and low profile.

This application discloses a corner module steering mechanism based on a rolling screw pair, comprising: a drive motor fixedly mounted on the vehicle body; a steering knuckle connected to the wheel hub, the steering knuckle having a steering arm and a lower connection point formed thereon, a steering tie rod connected to the steering arm, and the lower connection point being the lower point of the kingpin; and a rolling screw pair connected to the vehicle body, comprising a screw, a nut, and rolling elements, the nut being fitted onto the screw, the rolling elements being disposed between the nut and the screw, the nut being connected to the output end of the drive motor, and one end of the screw being connected to the steering tie rod, the screw being configured to move linearly only along the axial direction of the nut; when the wheel steers, the drive motor drives the nut to rotate and transmits the rotation through the rolling elements, causing the screw to move axially, which in turn drives the steering knuckle to rotate around the kingpin via the steering tie rod. This application eliminates the complex piping and pump structure of the hydraulic system, resulting in a simple and compact structure, and eliminating the possibility of hydraulic oil leakage.