269 results about "Balancing machine" patented technology

The invention relates to the technical field of mechanical engineering, in particular to a reciprocating type vertical lifting device.Two stand columns are fixedly connected to the top of a rail car, ejector rods are fixedly connected to the tops of the stand columns, a dynamic lifting mechanism is fixedly connected to the side faces of the stand columns, and a fixed side plate is arranged in the middle of the dynamic lifting mechanism; winding drums are arranged on the side faces of the two sides of the fixing side plate, a bearing mechanism is arranged in the middles of the two stand columns, a bearing table is arranged in the middle of the bearing mechanism, a balance mechanism is arranged at the bottom of the bearing mechanism, a balance base is arranged in the middle of the balance mechanism, and a balancing weight fixing base is arranged at the bottom of the balance base; a deceleration block is arranged on the side face of the balance mechanism, capsizing moment generated by goods deviation and position is counteracted, the deviation problem of the bearing mechanism is solved, friction between the bearing mechanism and the stand column guide rail is reduced, the stress of the root of the stand column is reduced, and the maintenance period is prolonged.

The utility model discloses hoisting equipment for building construction, which comprises a base, a hoisting frame is arranged on the upper side of the base, an electric hoist is arranged at the upper end of the left side of the hoisting frame, a loading frame is arranged at the tail end of a hoisting rope in the electric hoist, and the hoisting equipment further comprises a balance mechanism; the balance mechanism comprises a balance shell, a partition plate, a longitudinal balancing weight, a first electronic level meter, a transverse balancing weight and a second electronic level meter, the balance shell is arranged in the middle of the lower side of the object carrying frame, the partition plate is arranged in the balance shell, and the longitudinal balancing weight is slidably connected into a first dovetail groove formed in the upper side of the partition plate. Through the transmission element and the detection element, horizontal inclination detection and horizontal self-adjustment can be automatically carried out on the hoisting part of the building object, so that the building object is always in a horizontal position in the hoisting process, the hoisting stability of the device on the building object is improved, the process is not limited by factors such as a screw rod, use is convenient, and the hoisting stability coverage range is wide.

The invention provides a self-balancing double-rocker-arm floor derrick balancing mechanism, and relates to the technical field of double-rocker-arm floor derricks, the self-balancing double-rocker-arm floor derrick balancing mechanism comprises a floor derrick stand column, an auxiliary mechanism facilitating self-balancing of the floor derrick stand column is arranged on the floor derrick stand column, and the auxiliary mechanism comprises a PLC, a mounting side rod, a servo motor, a steel cable and a hydraulic controller; the PLC is located on the floor derrick stand column, the mounting side rods are located on the two sides of the PLC, the servo motors are located at the side ends of the mounting side rods, the steel cables are located at the lower ends of the servo motors, and the hydraulic controllers are located at the lower ends of the steel cables. According to the device, the hydraulic controller is arranged to be matched with the hydraulic claw, when a system detects that the load on one side is too large, the PLC can synchronously control the servo motor on the other side to release the corresponding amount of steel cables, and the whole derrick structure is promoted to slightly and controllably rotate or adjust the posture.

This invention relates to the field of industrial robots, specifically to a heavy-duty robot with an adjustable counterweight arm. A robotic arm structure and a counterweight structure are respectively arranged on both sides of a support column. A first motor is located above the support column, and the output end of the first motor is connected to a first lead screw. The first motor drives the first lead screw to rotate, controlling the robotic arm structure to move up and down along the lead screw. A connecting structure is provided between the robotic arm structure and the counterweight structure. The counterweight structure contains several counterweight blocks, and a counterweight adjustment component is located on one side of the counterweight structure. The counterweight adjustment component can automatically increase or decrease the number of counterweight blocks inside the counterweight structure to balance the weight of the robotic arm structure. The adjustment is automatic based on the weight difference between one side of the robotic arm structure and the other side of the counterweight structure, eliminating the need for manual adjustment of the number of counterweight blocks and improving work efficiency.

The invention relates to a dynamic balancing machine test bench, and relates to the technical field of balancing machines, the dynamic balancing machine test bench comprises a dynamic balancing machine body and a console used for controlling the dynamic balancing machine body, one side of the dynamic balancing machine body is provided with an air pump, the upper end of the air pump is communicated with an air pipe, the air pump is electrically connected with the console, the air pipe is communicated with a flow divider, the flow divider is communicated with a flow dividing pipe, and the flow dividing pipe is electrically connected with the console. A mounting table is arranged on one side of the dynamic balancing machine body, a height adjusting assembly used for changing the height of the mounting table is arranged on the lower portion of the mounting table, an annular rail is fixedly connected to the mounting table, an arc-shaped sliding rail is slidably connected to the annular rail, and a positioning pipe and a fixing assembly used for fixing the positioning pipe to the arc-shaped sliding rail are arranged on the arc-shaped sliding rail. The flow dividing pipe is fixedly connected and communicated with the positioning pipe, and an adjusting assembly used for adjusting the position of the arc-shaped sliding rail is arranged on the mounting table. The method has the effect of improving the detection precision of the dynamic balancing machine.

This invention relates to the field of wheel hub dynamic balancing testing technology and discloses an integrated wheel hub dynamic balancing testing device, including a dynamic balancing machine body. During testing, the operator places the wheel hub inside the wheel hub limiting block, then drives the wheel hub upward via a hydraulic lifting rod, aligning the center hole of the wheel hub with the rotating shaft. A servo motor is then activated, driving a lead screw to rotate, which in turn moves a slider, which in turn moves the wheel hub, allowing it to be fitted onto the rotating shaft. While the wheel hub is on the shaft, a clamping sleeve is threaded onto the shaft and tightened, thus securing the wheel hub. Finally, the drive motor drives the rotating shaft to rotate, thereby testing the wheel hub. This structure saves time and labor, reduces labor consumption, improves testing efficiency, and enhances the practicality of the integrated wheel hub dynamic balancing testing device.

The utility model relates to the technical field of hoisting of precast concrete, in particular to an auxiliary hoisting device for precast concrete. The two lifting hooks are used for hanging a concrete prefabricated part, and the two lifting hooks are rotationally arranged on the lower portion of the hanging bracket; the balance mechanism is fixedly arranged in the middle of the hanging bracket, the balance mechanism comprises a balance box with a containing cavity, a balancing weight arranged in the balance box and a driving assembly used for driving the balancing weight to reciprocate in the length direction of the balance box, and the balance of the concrete prefabricated part is adjusted by changing the position of the balancing weight in the balance box. According to the utility model, the balance mechanism is arranged on the hanging bracket, so that when the precast concrete is inclined during hoisting, the relative position of the balancing weight in the balance box is adjusted through the driving assembly, the gravity center distribution is changed, the posture of the hanging bracket is corrected to be in a balanced state, the shaking amplitude is reduced, the stability in the hoisting process is ensured, and the damage risk of the precast concrete is reduced; and the security threats of construction site personnel and peripheral settings are also reduced.

The application discloses a self-balancing offshore operation platform safety ladder and a use method thereof, which comprises a sliding seat arranged in a horizontal sliding mode, a connecting frame hinged to one end of the sliding seat, a footboard horizontally and rotationally connected to the connecting frame, and a counterweight hung at the bottom of the footboard, wherein a hoisting frame is installed at the top of the sliding seat, the top end of the hoisting frame is connected with the movable end of the connecting frame through a lifting rope, and a horizontal shaking buffer assembly is arranged between the connecting frame and the footboard. The self-balancing mechanism and the buffer assembly significantly improve the stability of the safety ladder under complex sea conditions, the real-time response and anti-skid design ensure the safety of personnel getting on and off the platform, and the quick installation and modular design facilitate daily use and maintenance.

The utility model provides a dynamic balancing machine for detecting an axle hub brake drum assembly, comprising a machine body, the machine body is provided with a balance detection tool, the balance detection tool comprises a pull rod, and the balance detection tool is provided with the axle hub brake drum assembly; the rotating part is arranged on the machine body and is connected with the balance detection tool; the detection mechanism is mounted on the machine body in a sliding manner; the lifting transmission mechanism is installed on the machine body and connected with the detection mechanism, the lifting transmission mechanism drives the detection mechanism and the rotating component to do lifting motion under the action of the driving force, and the detection mechanism drives the balance detection tool on the rotating component to rotate. And the detection mechanism detects the unbalance vibration amplitude of the axle hub brake drum assembly on the balance detection tool, so that the unbalance vibration amplitude of the axle hub brake drum assembly can be automatically and rapidly detected, the detection efficiency is greatly improved, the operation is simple, and the structure is compact.

The application relates to the technical field of compression performance testing, in particular to a regenerated polyester fiber roadbed reinforcing material compression performance testing device and method thereof through sensor monitoring, which comprises a supporting plate, a support fixed on the supporting plate, and a top plate arranged at the top of the support; a pressure tank fixed on the supporting plate is used for bearing water, a rubber pipe is arranged in the pressure tank, and pressure regulating pipes are symmetrically arranged on the side wall of the pressure tank; a pressure regulating mechanism is arranged in the pressure regulating pipe, a piston disc in sliding sealing connection with the pressure regulating pipe is connected to the pressure regulating mechanism, a follow-up balance mechanism is arranged on the pressure regulating mechanism, when a sample arranged in the rubber pipe is compressed and the side edge of the sample is deformed, water enters the pressure regulating pipe and pushes the piston disc, under the action of the pressure regulating mechanism and the follow-up balance mechanism, the support force borne by the piston disc can be kept within a certain range at all times, so that the accuracy of the compression performance test is ensured.

This utility model relates to the field of horizontal jack manufacturing technology, and in particular to a differential pressure balanced oil discharge valve, a control valve assembly, and an electric pump station. The differential pressure balanced oil discharge valve is the core component for achieving smooth jack descent, and includes a valve body, a valve core assembly, a pressure balancing mechanism, and a drive assembly. The valve body has a first oil passage and a second oil passage; the inner valve core of the valve core assembly has a pressure balancing channel, and an elastic reset element provides initial sealing pre-tightening force; the pressure balancing mechanism seals the pressure balancing channel through a sealing body. The drive assembly employs a two-stage control: the first stage pushes the pusher to open the sealing body, initially connecting the first and second oil passages, balancing the oil pressure, and reducing the pressure difference of the inner valve core; the second stage directly acts on the inner valve core, causing it to overcome the pre-tightening force to fully connect the first and second oil passages, achieving smooth hydraulic oil return, ensuring stable and vibration-free jack descent, while reducing operating force and improving safety and convenience.

The utility model provides a quick locknut for a tire balancing machine and a tire changer, which comprises a cylinder base body, handles, a split nut block and a first spring, the handles are arranged on two sides of the cylinder base body, the split nut block and the first spring are arranged in the cylinder base body, a round pin and a pan head bolt are arranged above the split nut block, and the first spring is arranged above the round pin. The air cylinder base body is installed on the lead screw, and threads matched with each other are arranged on the surface of the lead screw and the surface of the split nut block. The product weight is light; the quality is good; the bearing capacity is large, a tire changer and a tire balancing machine can be universally used, and the variety of materials is greatly reduced; the quick locking nut is applied to a tire dismounting machine, the cone is additionally arranged at the bottom, the quick positioning and locking effect can be achieved, the quick locking nut can be applied to other industries due to large bearing capacity and looseness prevention, and the application range is greatly widened.

The invention relates to a medical bed bottom frame and an upright medical bed, and belongs to the technical field of medical beds, the medical bed bottom frame comprises a bottom frame, and pedal type brake trundles are installed at the bottom of the bottom frame; the telescopic balance mechanism comprises a movable supporting frame, a telescopic connecting piece and a limiting linear driving piece, one end of the telescopic connecting piece is hinged to the bottom frame, the other end of the telescopic connecting piece is hinged to the movable supporting frame, and the limiting linear driving piece drives the movable supporting frame to move in the length direction of the bottom frame; when the movable supporting frame extends out of the bottom frame, the bottom of the movable supporting frame abuts against the ground, and the top of the movable supporting frame is in a balanced supporting state. When the movable supporting frame retracts into the bottom frame, the bottom of the movable supporting frame is far away from the ground, and the top of the movable supporting frame gets close to the bottom of the bottom frame to be in a storage state.

The utility model provides clothes processing equipment which comprises a frame, a clothes drying module and a clothes washing module. The frame comprises a stand column assembly and a middle cross beam assembly. The stand column assembly comprises a mounting base and four stand columns, and the four stand columns are vertically arranged at the four corners of the mounting base correspondingly. The front stand column comprises a front stand column first section and a front stand column second section, and the front stand column second section and the rear stand column are oppositely arranged front and back and are equal in length. The middle beam assembly is connected with the joint of the front stand column first section and the front stand column second section and the upper end of the rear stand column. An upper mounting space is defined by the middle cross beam assembly and the two front stand column first sections, and a clothes drying module can be mounted in the upper mounting space; a lower mounting space is defined by the middle cross beam assembly, the two front stand column second sections and the two rear stand columns, and a clothes washing module can be mounted in the lower mounting space; the front stand column segmented design is matched with the rear stand column differentiated length, a front-back direction moment self-balancing mechanism is formed, and stress concentration of the front stand column is reduced; the middle cross beam assembly serves as a rigid transition layer and isolates vibration between the clothes washing module and the clothes drying module.

This invention relates to the field of aircraft strength testing technology, and discloses a load reduction device and method for aircraft wing top-mounted strength testing. It utilizes the lever principle to apply a downward load reduction load to the wing to balance the upward top-mounted load borne by the wing top point, thus reducing the overall load on the aircraft to zero and achieving the purpose of load reduction. This invention uses the lever principle to reduce the output load of the hydraulic actuator, achieving small load balancing of extremely large loads. Furthermore, for extremely large single-point loads at a single top point, only a few load reduction load application points need to be applied, reducing the loading channels for the load reduction load and lowering the test complexity. By using the small load of the hydraulic actuator to balance the extremely large load at the top point, the safety and reliability of the test are improved, solving the reliability and safety problems of balancing extremely large single-point loads in wing top-mounted strength testing.

The invention provides a fresh flower harvesting trolley based on stalk adaptive cutting and vibration compensation, and relates to the field of agricultural automatic picking, and the fresh flower harvesting trolley comprises a rack (10), a moving mechanism (20), a harvesting self-balancing mechanism, a platform (40), a guide rail sliding table mechanism, a retractable picking mechanical arm mechanism, a tail end cutting mechanism, a storage mechanism and a binocular camera, the bottom ends of the four corners of the rack (10) are each provided with a set of moving mechanism (20). The four harvesting self-balancing mechanisms are sequentially arranged at the four corners of the top end of the rack (10), and the top ends of the harvesting self-balancing mechanisms are connected with the bottom face of the platform (40). The guide rail sliding table mechanism is arranged on the end face of the platform (40) and located in the middle of the platform (40) and provided with the retractable picking mechanical arm mechanism, and the tail end cutting mechanism is arranged at the bottom end of the retractable picking mechanical arm mechanism. According to the harvesting trolley, high-precision positioning and high-success-rate cutting of various fresh flowers can be achieved, and the picking efficiency and the quality of the picked fresh flowers are improved.

The invention discloses an omni-directional active dynamic balance system of a tower crane and a control method. The omni-directional active dynamic balance system comprises an attitude monitoring unit, a control unit, a longitudinal balance mechanism and a transverse balance mechanism, the control unit controls the longitudinal balance mechanism and / or the transverse balance mechanism to act according to the posture deviation direction, so that the tower body keeps vertical and does not shake in the transverse direction. The method comprises the steps of real-time monitoring, deviation judgment, dynamic adjustment and closed-loop feedback. The transverse balance mechanism is independently arranged, transverse shaking is adjusted through the relative position difference of the double counterweight components, 360-degree omni-directional active dynamic balance of the tower crane is achieved for the first time, any dynamic disturbance including wind load and rotation centrifugal force can be sensed and corrected in real time, alternating bending moment borne by a tower body is eliminated, fatigue of a metal structure is delayed, and the service life of the tower crane is prolonged. And the service life of the tower crane is greatly prolonged.

The utility model provides a kind of dynamic balance valve, belong to valve field.It solves the problem of existing balance valve maintenance difficulty and unstable differential pressure.This dynamic balance valve, including the valve body that inside formation has fluid passage, flow regulating mechanism, self-balancing mechanism and fixed assembly, flow regulating mechanism includes exposed flow regulating hand wheel, flow regulating lever and stainless steel core, exposed flow regulating hand wheel design, automatic balancing mechanism includes diaphragm, differential pressure control sleeve, flow differential pressure guide rod and spring, fixed assembly includes E-type snap spring and multiple O-rings, wherein, the first end of spring abuts the differential pressure control sleeve, second end abuts valve body inner wall, drive the differential pressure control sleeve by diaphragm response inlet pressure change, linkage flow differential pressure guide rod compresses or releases the spring, drives stainless steel core dynamic regulation valve opening degree.The utility model has the advantages that manual maintenance is simple and differential pressure is stable.

This application provides a method and related equipment for calculating the sampling control period of a self-balancing robot. The method includes: acquiring the dynamic model and motor control input information of the self-balancing robot; calculating the sampling control description information of the self-balancing robot for any time interval within a preset sampling interval based on the dynamic model and motor control input information; acquiring the instantaneous energy functional, cyclic correlated energy functional, and interval cumulative energy functional of the self-balancing robot at any time interval, and constructing cyclic energy constraint information based on the instantaneous energy functional, cyclic correlated energy functional, and interval cumulative energy functional; and performing negative qualitative analysis on the cyclic energy constraint information in conjunction with the sampling control description information to calculate the sampling control period corresponding to the self-balancing robot. In this way, by calculating the maximum permissible sampling control period, communication and computing resources can be saved while ensuring stable system operation.

The embodiment of the invention provides a light-weight robot spraying system which comprises a four-cable-driven parallel robot which is hoisted on a to-be-sprayed wall surface through a rope and used for adjusting the spraying position. And the auxiliary balance mechanism is connected with the four-cable-driven parallel robot, an end effector used for spraying operation is carried on the auxiliary balance mechanism, and the auxiliary balance mechanism can ensure that the spraying posture of the end effector is kept stable. According to the embodiment of the invention, two-degree-of-freedom movement of the end effector in a plane and three-degree-of-freedom posture stability in space are jointly ensured through the four-cable-driven parallel robot and the auxiliary balance mechanism, and the problems of high cost, long period and poor safety of a manual spraying mode for building a scaffold in large-span wall surface spraying are solved; and an automatic solution is provided for large wall surface spraying of equipment such as ships and the like.

The invention discloses a ball balance robot motion control method and device, a medium and equipment. The method comprises the steps that a 9-degree-of-freedom low-dimensional equivalent dynamic model is constructed based on mechanical configuration of a ball balance robot; based on the low-dimensional equivalent dynamic model, executing model prediction control in each control period of the ball balance robot to obtain an optimal control moment of the ball balance robot in the current control period; and performing motion control on the ball balance robot according to the output optimal control moment. Based on jacobian matrix reversibility caused by a geometric structure that a wheel disc of a driving wheel passes through a sphere center, through an analytic elimination method, a sphere angular velocity which cannot be measured in a traditional 12-degree-of-freedom system is eliminated from the system, so that an accurate 9-degree-of-freedom low-dimensional equivalent dynamical model which only depends on measurable parameters is obtained, and the measurement accuracy is improved. The method is higher in precision, and lays a mathematical foundation for high-frequency real-time control.

The utility model relates to the technical field of small fans, and provides an electric swinging fan with a balance mechanism. Comprising a fixedly-arranged driving device, the output end of the driving device is connected with fan blades, and the fan blades are connected with a balance rod; the driving device drives the fan blades and the balance rod to swing in a reciprocating mode. The electric swing fan has the advantages that the balance rod is installed on the fan blades of the electric swing fan in a matched mode, so that the driving device is stressed in a balanced mode; by means of the structure, efficient swinging of the fan is achieved.

This invention discloses a control box device and application method for a three-compartment pressure slack probe differential pressure self-balancing, including a pressure slack probe control box, a three-compartment pressure slack probe, and a nitrogen power source. The pressure slack probe control box contains a first gas compartment, a water compartment, and a second gas compartment. Adjacent compartments are connected by a deformable partition, springs, and a transmission rod, forming a mechanical differential pressure self-balancing mechanism. When a pressure difference occurs between the water compartment and any gas compartment, the deformable partition displaces under the pressure difference, changing the compartment volume, and the springs provide a reverse elastic force, achieving self-regulating balance between water and gas pressure. This invention solves the problems of complex differential pressure adjustment operation, measurement distortion caused by pressure imbalance, and instability during the pressure slack membrane adhesion process in traditional pressure slack probes, providing continuous and stable control throughout the testing process.

The utility model discloses a vehicle chassis dynamic balance test device which comprises a tire dynamic balancing machine, storage grooves, a console, a main shaft, a ranging rod, a sliding groove, a sliding plate, a tire power-assisted loading and unloading structure and a transmission column, the storage grooves are distributed in the top end of the tire dynamic balancing machine, and the console is installed on the rear portion of the top end of the tire dynamic balancing machine. The main shaft is installed at the top of the left end of the tire dynamic balancing machine, the ranging rod is installed on the front side of the main shaft, the sliding groove is formed in the lower portion of the front end of the tire dynamic balancing machine, the sliding plate is installed on the lower side of the main shaft through the sliding groove, the tire power-assisted loading and unloading structure is installed at the left end of the sliding plate, and the rear portion of the transmission column is fixed to the sliding plate through the sliding groove. The tire dynamic balancing machine solves the problems that when the tire dynamic balancing machine is used, a tire and a main shaft of the tire need to be assembled and disassembled, the weight of the tire is large, and once threads are collided during tire assembling and disassembling, a hub is damaged and installation is influenced.

The invention discloses an integrated circuit capable of testing mutual inductor parameters and detecting mutual inductor balance points, which comprises a small board connected with a mutual inductor product, and a mainboard connected with the small board and used for acquiring data of the mutual inductor product, and controls a testing machine to test the mutual inductor parameters and controls a balancing machine to test the mutual inductor balance points through the mainboard. Under the condition that an optimal balance point does not need to be detected, the integrated circuit is called to control the test machine to work to carry out product mutual inductor parameter detection, and under the condition that a balancing machine needs to be used, a small number of integrated circuits are called to control the balancing machine to work to carry out optimal balance point detection, so that the integrated circuits can be called to carry out different works according to actual use requirements; therefore, an independent control circuit does not need to be arranged in the testing machine or the balancing machine, the number of the control circuits is reduced, and the effects of reducing cost and reducing resource waste are achieved.

The utility model discloses a locking cylinder for a wheel dynamic balancing machine, and relates to the technical field of wheel dynamic balancing machines. The wheel dynamic balancing machine aims to solve the problems that when an existing wheel dynamic balancing machine is used for installing wheels, split nuts are mostly used for manual locking, installation efficiency is low, and use is inconvenient. The locking pull rod on the transmission assembly of the wheel balancing machine can be tensioned and pushed out by controlling retraction and extension of the telescopic rod of the air cylinder, so that the wheel can be locked and loosened. When the air cylinder telescopic rod retracts, the telescopic rod is driven to retract into the mounting sleeve through the air cylinder rod connecting piece, the second bearing, the connecting piece outer sleeve and the telescopic rod connecting piece, the locking pull rod is pulled out, and the wheel can be locked. Similarly, when the telescopic rod of the air cylinder extends out, the telescopic rod is pushed to extend out of the mounting sleeve, the locking pull rod is pushed back, and the wheels are loosened; according to the locking air cylinder for the wheel dynamic balancing machine with the structure, the wheel can be quickly locked and loosened only by controlling the stretching, retracting and resetting of the telescopic rod of the air cylinder. The utility model is suitable for the wheel dynamic balancing machine.

The application discloses a space-saving balanced machine belt driving structure. A rotor is arranged above a driving base plate, a mounting panel is arranged on the upper portion of the driving base plate, two driving arms are symmetrically arranged on the mounting panel, a motor assembly and a cylinder assembly are arranged on the bottom of the driving base plate, a wheel assembly comprises wheels, the wheels of the wheel assembly are arranged on the driving arms, the motor assembly and the mounting panel respectively, the cylinder assembly is connected with the driving arms and the motor assembly respectively, the driving arms and the wheel assembly are driven to fold and unfold by the motor assembly and the cylinder assembly, and the rotor above the driving base plate is driven to rotate. The driving arms are moved to the working bottom surface of the balanced machine when the driving device is not needed to drive, the space around the workpiece rotor is saved, the automatic feeding and discharging functions of the mechanical hand are more facilitated, the automatic processing of the balanced machine industry is more suitable, the wrap angle of the belt and the workpiece rotor is greatly improved, and the time cost of the balanced rotor is reduced.

The application discloses an axial force balancing mechanism and a turbo expander. The axial force balancing mechanism is used for balancing the axial force of a turbo expander. The axial force balancing mechanism comprises a casing, a main shaft rotatably connected with the casing, the main shaft having an expansion end and a pressurization end, the expansion end being provided with a working wheel, and the pressurization end being provided with a pressurization wheel; a shaft sleeve fixed to the main shaft, the inner shaft sleeve being provided with a shaft sleeve sawtooth; and a sealing device connected with the casing and corresponding to the inner shaft sleeve, the sealing device being provided with a sealing sawtooth; wherein the tooth shapes of the shaft sleeve sawtooth and the sealing sawtooth are staggered. The axial force balancing mechanism and the turbo expander can realize the balance adjustment of the axial force of the expander.

The application relates to a tricycle and a split self-balancing mechanism thereof, which comprises a front fixed frame and a rear adjusting frame which are split from each other, a bearing assembly is connected between the front fixed frame and the rear adjusting frame, the bearing assembly comprises a bearing fixed frame which is installed on the front fixed frame, a bearing connecting plate which is installed on the rear adjusting frame, and a bearing body which connects the bearing fixed frame and the bearing connecting plate, the rear adjusting frame receives force generated by vehicle tilting. When a driver rides, the vehicle can reduce vehicle bumping and increase riding comfort according to different road conditions, and the vehicle can avoid side turning when turning, so that the riding safety of the driver is ensured.

A modular wheeled mobile ultrasonic structure detection apparatus is disclosed, including a mobile detection platform, at least one ultrasonic detection roller, at least one ultrasonic sensor, and a steering balance mechanism including a connecting arm and at least one balancing apparatus; the balancing apparatus includes a balancing cylinder hinged to the connecting arm, a balancing spring provided in the balancing cylinder, and a steering linkage hinged to the mobile detection platform, a piston being connected to one end of the steering linkage away from the mobile detection platform and the balancing spring being in contact with the piston; and the piston can move along a length direction of the balancing cylinder and thereby define a direction of the steering linkage. When the structure surface fluctuates, bends, or turns, the mobile detection platform can rotate relative to the connecting arm to change the moving posture to adapt to various complex detection conditions. A mobile carrier can pull the detection apparatus in a moving state to realize the non-contact continuous acquisition of ultrasonic waves between the ultrasonic sensor and the structure surface.