223 results about "Load force" patented technology

The invention relates to a side-hung rotating platform real-time counterweight device, a side-hung rotating platform and a control method, and belongs to the technical field of automation equipment. According to the application, the eccentric load torque of the load is monitored in real time, and the counterweight assembly driven by the linear motor is controlled to move according to the eccentric load torque, so that the counterweight force arm is dynamically adjusted, and the reverse counterweight torque is accurately generated to counteract the eccentric load torque. And when the movement compensation is insufficient, the number of the balancing weights can be increased, so that the balancing weight quality is improved. The motion precision can be effectively improved, the equipment is protected, and the stability is improved.

The utility model discloses a resistance module connecting structure and fitness equipment, and the resistance module connecting structure comprises a rack; the load assembly is connected to the rack, and the load assembly comprises a load motor and a movable part; the output assembly is connected to the rack and comprises a connecting block, a movable pulley, a connecting rope and a stretching part which are sequentially connected, the connecting block is fixed to the movable part, the movable pulley is rotationally installed on the connecting block, and the connecting rope is wound around the movable pulley and extends outwards; wherein the load motor can output load force, and the stretching part is suitable for being pulled outwards so as to drive the connecting rope, the movable pulley, the connecting block and the movable part to move together; the load motor is in transmission connection with the movable part and used for driving the movable part to reset. A transmission structure is obviously optimized, the stretchable displacement range in the operation and use process of players is enlarged, the problem that ropes are folded is reduced or even avoided, and the stability and smoothness of power transmission are improved.

The invention provides a loading force control method for servo torque feed-forward and linear active disturbance rejection control, and belongs to the technical field of servo hydraulic equipment control. The method comprises the steps that a servo hydraulic tension pad dynamic model is constructed, and the servo torque feed-forward and linear active disturbance rejection control loading force is obtained based on the servo tension pad dynamic model and structural design parameters of a servo tension pad test bed; building a simulation model of the servo stretching pad; a simulation data set and an experiment data set are collected, the simulation data set and the experiment data set are combined, weighted and preprocessed, and a standardized feature matrix is obtained; constructing a servo feed-forward torque prediction model based on XGBoost, taking the standardized feature matrix as model input, and outputting a feed-forward torque; constructing a second-order system model of the servo stretching pad; and combining the feed-forward torque output by the servo feed-forward torque prediction model with the feedback torque calculated by the linear active disturbance rejection control to form a final torque instruction of the servo motor. According to the invention, the control precision and robustness of the loading force in the production process of the servo hydraulic stretching cushion are improved.

The ball screw pair comprises a nut and a ball return device installed on the nut, a nut raceway is arranged on the nut, a ball return raceway is arranged on the ball return device, and the ball return raceway is in butt joint with the nut raceway. The ball screw pair is characterized in that the gradually-changing raceways are arranged at the two ends, in butt joint with the ball return raceway, of the nut raceway, and the gradually-changing raceways are arranged at the two ends, in butt joint with the ball return raceway, of the nut raceway. One end of the gradual-change raceway is in butt joint with the nut raceway and has the same depth as the nut raceway, and the other end of the gradual-change raceway is in butt joint with the ball return raceway and has the same depth as the ball return raceway; the ball screw pair has the advantages that the balls are in smooth transition from the nut raceway to the ball return raceway through the gradually-changed raceway, so that the vibration noise during working of the ball screw pair is greatly reduced, and the service life is prolonged; and moreover, as the positions of the two ends of the gradually-changed raceway are accurately determined, when the ball screw pair works, the area (namely the area of the gradually-changed raceway), which is not subjected to loading force during working, of the ball is controlled within the minimum range, and normal operation of the ball screw pair is ensured.

The utility model belongs to the technical field of ships, and particularly relates to a launching barge anchoring equipment reinforcing structure which comprises a launching barge. The launching barge comprises a buoyancy tank in the middle and buoyancy towers arranged at four corners of the buoyancy tank; anchoring equipment is arranged on the buoyancy tank, the anchoring equipment is used for fixing the launching barge in a water area, and the buoyancy tank comprises a buoyancy tank deck and a buoyancy tank end sealing plate; a fixing reinforcing device is arranged on the anchoring equipment and used for reinforcing the anchoring equipment. By arranging the anchoring equipment, when a ship is berthed, the anchoring equipment can fix the ship at a preset position and prevent the ship from drifting due to external force such as stormy waves, the structural strength of the anchoring equipment can be enhanced by arranging the fixing and reinforcing device, more loading force can be borne, and falling and damage caused by insufficient structural strength are prevented; the safety of the ship is influenced. The stable, safe and controllable operation of the ship entering and exiting the launching barge and the sinking and floating process is ensured, and the reinforcing structure of the launching barge anchoring equipment is reliable.

The invention discloses a bidirectional and horizontal action hydraulic capstan test device and method, and belongs to the technical field of test bench testing and test equipment. The device comprises a supporting seat, a hydraulic capstan and a load oil cylinder, the load oil cylinder adopts a unique structure that a piston rod is fixed and a cylinder body can move bidirectionally, and two ends of the cylinder body are connected with the hydraulic capstan winding drum through two steel wire ropes with opposite winding directions. The core is a set of hydraulic loop integrating an electric proportional overflow valve and four one-way valves: when a cylinder body is pulled, oil in a pressed cavity needs to return through the electric proportional overflow valve, and the simulation load force can be accurately controlled by setting the pressure of the valve through an electric signal; meanwhile, the loop can automatically supplement oil to the negative pressure cavity, vacuum is prevented, and stable load is ensured. The problem that in the prior art, a variable load cannot be provided for a bidirectional and horizontal acting hydraulic capstan is solved, precise and stable simulation of a single oil cylinder on a bidirectional load is achieved, and the hydraulic capstan load simulation device has the advantages of being compact in structure, precise in control, safe and reliable.

The invention discloses a high-precision closed-loop force control linear rotating motor and a force control method thereof, and relates to the technical field of motors, the linear rotating motor comprises a shell, a linear motor, a rotating output shaft part, a constant force spring device, a force sensor and a controller, the rotary output shaft part comprises a rotary motor, a rotary connecting piece and an output rotating shaft, and can realize composite motion of axial reciprocating and angular rotation; the constant-force spring device provides constant balance force in the linear direction to compensate for gravity loads. The force sensor detects output thrust in real time and generates a feedback signal; the controller performs closed-loop force control adjustment according to the feedback signal; according to the motor, through the built-in high-precision force sensor and the constant-force spring structure, high-precision, low-force-value and stable force control performance is achieved, output fluctuation can be effectively reduced, and the system response speed and control precision can be improved.

The invention relates to a door and window safety performance detection device for constructional engineering, and belongs to the technical field of constructional engineering detection. The uniformly distributed load force application assembly can apply uniform or gradient change pressure to the whole surface of the door and window to simulate wind pressure; the concentrated load force application assembly can perform fixed-point impact on specific parts of doors and windows and simulate hard object impact or violent forcible entry; the wind pressure loading assembly applies uniform and gradient-adjustable wind pressure loads to the surfaces of doors and windows, simulates stress states under different wind levels and detects the air tightness of the doors and windows, and the rainfall simulation assembly simulates rainfall environments with different strengths to detect the water tightness of the doors and windows; the deformation of doors and windows, the stress of key parts of the doors and windows, the water leakage condition and the air leakage condition can be monitored, and the comprehensiveness and the real-time performance of detection data are ensured. The system can achieve the detection of multiple safety performance dimensions of the doors and windows of the constructional engineering, effectively improves the detection efficiency and precision, reduces the manual operation intervention, and provides a comprehensive and reliable data support for the safety performance evaluation of the doors and windows.

The invention provides a high-precision calculation method for weighing a farm feed tower under a wind load condition, and belongs to the technical field of weight calculation methods. The method specifically comprises the following steps that the dead weight of a feed tower, the total weight after feed is added and the static supporting force of each supporting leg are determined; the wind direction is measured, and the supporting legs are divided into a windward group and a leeward group according to the vertical symmetry plane, perpendicular to the wind direction, of the center of the material tower; respectively calculating the vertical distance from each supporting leg of the windward group and the leeward group to the symmetry plane, calculating the wind load force and the upsetting moment by combining the wind speed to establish a supporting leg counter-force mathematical model under the wind load, and obtaining the dynamic supporting force of each supporting leg; superposing the static supporting force and the dynamic supporting force of each supporting leg to obtain an estimated supporting force of each supporting leg; the estimated supporting force of each supporting leg under the wind load and the supporting force, measured in real time, of each supporting leg are used for conducting filtering calculation to obtain accurate dynamic supporting force of the wind load; and deducting the accurate wind load dynamic supporting force and the dead weight of the feed tower to obtain the actual accurate weight of the feed.

The utility model discloses a resistance output module and fitness equipment, and the resistance output module comprises a rack; the load assembly is connected to the rack, and the load assembly comprises a load motor and a transmission chain; the output assembly is connected to the rack, the output assembly comprises a connecting part, a connecting rope and a stretching part which are connected in sequence, and the connecting part is fixed to one side of the transmission chain; wherein the load motor can output load force, the stretching part is suitable for moving outwards so as to drive the load motor to rotate through the transmission chain, and the load motor is in transmission connection with the transmission chain and used for driving the transmission chain to reset. The output assembly is fixed to the transmission chain, so that a player can directly pull the stretching component to train, the structure of a transmission system is greatly simplified, use of complex components such as a traditional speed reducer and a traditional differential mechanism is reduced, and the problem that a traditional rope is prone to being folded and wound when being repeatedly wound and released on a winding wheel is thoroughly solved; and smoothness and stability of power output are ensured.

A harmonic reducer flexible bearing test bench comprises a rack, the rack is provided with a driving module, a loading module and a data acquisition module, the driving module is connected with a to-be-tested bearing and is used for driving the to-be-tested bearing to perform eccentric rotation, the loading module abuts against the to-be-tested bearing and applies a loading force to the to-be-tested bearing, and the data acquisition module is used for acquiring data of the to-be-tested bearing. The data acquisition module acquires various detection data of a to-be-detected bearing in the detection process, the loading module comprises a loading block and a loading ring belt, one side of the loading block is used for being matched with the loading ring belt, and the other side of the loading block abuts against the to-be-detected bearing. The beneficial effects of the invention are that the loading block is arranged as an intermediate transmission element, and the direct contact between the loading ring belt and the bearing to be tested is effectively isolated, so that the fluctuation of the loading force caused by the uncertain contact area is reduced, and the accuracy and repeatability of test data are improved.

The invention relates to the technical field of engineering machinery control, and discloses a hydraulic control system under a variable load piling working condition, which comprises a multi-dimensional state acquisition module, a fluid parameter observation module, a signal reconstruction decoupling module, a virtual impedance mapping module and a fluid phase locking control module. The acquisition module acquires a basic physical state; the observation module solves the effective volume elastic modulus of the hydraulic oil based on a fluid continuity equation; the reconstruction module utilizes the modulus to correct signal lag, reconstructs external load force through an inverse dynamic model and decouples environmental acoustic impedance; the mapping module dynamically generates a target mechanical impedance parameter according to the environment impedance; and the control module calculates an ideal instruction based on the target parameter, corrects the gain by utilizing the fluid modulus and locks the rebound peak phase to adjust the action time sequence of the valve core. Control distortion caused by fluid parameter drift is solved, active flexible adaptation to variable load geology is achieved, energy hedging is avoided, and operation efficiency is improved.

The utility model discloses a four-force-arm multi-track strength training device which comprises a machine frame. The four adjusting assemblies are located on the same side of the rack and arranged on the periphery of the rack, each adjusting assembly comprises an adjusting base and an output rod, the adjusting bases are rotationally connected to the rack in the horizontal direction, and the output rods are rotationally connected to the adjusting bases in the vertical direction; the four stretching parts are connected with the adjusting assemblies in a one-to-one correspondence mode, each stretching part comprises a pulling block, the pulling blocks are connected to the outer side of the output rod, and the pulling blocks are suitable for being pulled outwards; and the resistance output module is connected to the rack, and the resistance output module is used for outputting load force to the pulling block. Two additional force arms and a flexible multi-angle adjusting mechanism are added, the types of training actions are greatly enriched, the adaptability and expansibility of the equipment are improved, a user can do diversified and personalized exercise according to different muscle groups, operation is easy, convenient and visual, the equipment is suitable for people of various body types and training levels, and the practicability is high. And the fitness experience and the training effect are obviously enhanced.

A headgear for securing a mask to a user's face is described. The headgear requires a first load force to elongate the headgear and, when fitted to a user, applies a balanced fit force that substantially equals a load force applied to the headgear during respiratory therapy. In some embodiments, the headgear includes an elastic portion configured to provide a retraction force, a non-elastic portion configured to be inelastic in comparison to the elastic portion, and a restriction mechanism connected to the non-elastic portion and to the elastic portion. The restriction mechanism is configured to apply a first resistance force to the user's head on elongation of the headgear and a second resistance force to the user's head on retraction of the headgear.

The invention provides a coal mine underground reservoir dam body anti-impact stability simulation test device and method.The device comprises a main body frame, a dam body model, dam body loading systems, an impact disturbance system, an impact energy monitoring system and a response measurement monitoring system, and the dam body loading systems are arranged on the upper portion and the two sides of the main body frame; the static load module is used for providing vertical static load force and transverse static load force for the dam body model; the impact disturbance system is arranged at the upper part of the main body frame and is used for applying a dynamic load force to a target position of the dam body model; the impact energy monitoring system is used for monitoring the impact speed and impact energy of the impact disturbance system; and the response measurement monitoring system is used for monitoring the response state of the dam body model when the dam body loading system and the impact disturbance system act. According to the method, the mechanical response characteristics and the deformation failure rule of the underground reservoir dam body under the impact load effect can be obtained, and the impact dynamic disaster breeding and causing mechanism of the underground reservoir dam body of the coal mine is disclosed.

The utility model discloses a self-balancing pile foundation static loading force detection device which comprises a load box, one end of an upper displacement rod and one end of a lower displacement rod are fixedly assembled on the side wall of the load box, a jack is fixedly assembled in the load box, the top of the load box is fixedly connected with one end of an oil pipe, and a steel cage is assembled on the outer side wall of the load box. The other ends of the upper displacement rod and the lower displacement rod are fixedly connected with a displacement sensor, the displacement sensor is fixedly assembled at the bottom of the datum line beam, the displacement sensor is in electric signal connection with data analysis equipment, and the other end of the oil pipe is fixedly connected with a high-pressure oil pump. The load box is redesigned in the device, pipeline distribution in the load box is more reasonable, the connecting process of the displacement sensor and the corresponding pipeline is simplified by optimizing pipeline distribution, meanwhile, the steel cage is also designed in the device, the mode that horn ribs are matched with reinforcing ribs is adopted, and the stability of the device is improved. The stability of connection and fixation between the steel cage and the load box is enhanced, and the protection effect of the steel cage on the load box is enhanced.

The invention relates to the technical field of testing, and provides an actuator loading testing device which comprises a hydraulic oil cylinder, a reversing valve, a hydraulic pump, a motor, a first ball valve, a second ball valve, a proportional overflow valve, an electromagnetic overflow valve and a controller. The controller is used for controlling the first ball valve, the second ball valve, the reversing valve, the electromagnetic overflow valve or the proportional overflow valve according to the oil inlet and outlet pressure of the first cavity A and the second cavity B of the hydraulic oil cylinder so as to test the actuator. The device not only can carry out a tension test of the actuator, but also can carry out a thrust test of the actuator, not only can carry out a variable and constant load test of the actuator, but also can keep the load force unchanged when the actuator moves so as to carry out a constant load test of the actuator and cover a full working condition test of the actuator, and the whole device is loaded by a hydraulic system, so that the test efficiency is improved. High load can be obtained by increasing system pressure, and the whole device is safe and reliable.

The embodiment of the invention discloses a robot control method and device, equipment and a medium, and the method comprises the steps that the current state information of a target joint of a robot is obtained, and the current state information at least comprises the current joint angle, the current load mass and the current angular velocity; based on the current joint angle and the current load mass, the current load torque of the target joint is determined; the current load moment is a blocking moment which acts on the output end of the transmission device of the target joint and is generated by a load; determining a target current value of the target joint based on the current load moment and the current angular velocity; and controlling a target joint of the robot based on the target current value.

The invention provides a control method. The control method comprises the following steps: controlling a motor to start based on a rotating speed-current serial double closed-loop mode; and when the driving force and the loading force of the motor are balanced, switching to control the motor to work based on a pressure-current series-connection type double closed-loop mode or a position-current series-connection type double closed-loop mode. According to the configuration, on one hand, different control modes are used in different stages, and the overall complexity of the control scheme is reduced; on the other hand, the logic of the switching control sub-schemes is modified, so that the switching opportunity between the two control sub-schemes is more reasonable; the problem that in the prior art, the whole control scheme is complex or the switching opportunity of the control sub-schemes is unreasonable is solved. In one embodiment of the invention, when the difference value between the driving force and the load force is small, the output amplitude limiting of the current inner loop is triggered, and the stability during dynamic switching can be further improved.

The invention discloses an operation early warning method and device of a dredger, the dredger and a storage medium, and relates to the field of water conservancy projects. The method comprises the following steps: calculating an external loading force of a corresponding monitoring point based on real-time working condition data of the dredger at each monitoring point; calculating the abnormal energy increment of the corresponding monitoring point based on the external load force of each monitoring point; performing space-time weighting processing on the abnormal energy increment of each monitoring point to obtain a comprehensive risk index of the dredger; performing deviation fusion processing on the real-time working condition data and the reference working condition data of each monitoring point to obtain a comprehensive deviation index of the dredger; and performing early warning according to the comprehensive risk index and the comprehensive deviation index. According to the technical scheme, the accuracy of early warning of the operation of the dredger is improved.

The utility model relates to a logistics equipment technical field especially relates to a turnover mechanism, including conveying assembly and the frame of one side of conveying assembly, still include swing subassembly, swing board both ends are equipped with clamping assembly and counterweight subassembly respectively, drive subassembly is used for promoting swing board rotation to make clamping assembly overturn, limiting component is used for limiting clamping assembly, the utility model discloses two clamping air cylinders drive mobile seat linear movement along the branch board respectively, utilizes fixed base and mobile seat to form the clamping surface, realizes the clamping or loosening of goods, promotes swing board to rotate around the first pivot through drive subassembly, utilizes lever principle to realize the lifting overturn of clamping assembly, and counterweight subassembly offsets the load torque of clamping end, reduces the drive energy consumption.

High-offset belt tensioners have an end plate having a bore therethrough, a pivot tube with a first end fixedly connected in the bore of the end plate and a second end having an annular cup, an arm seated over the annular cup of the pivot tube for rotation relative thereto, and a flat wire torsion spring with its inner spring hook attached to the pivot tube and its outer spring hook attached to the arm at a position that counterbalances a hub load force acting in a first plane. The flat wire torsion spring biases the arm in a belt engaging direction and applies a spring force acting on the arm in a second plane. A direction of the spring force acting on the arm stays in the same location with respect to the arm and moves with the arm throughout its entire sweep in the belt engaging direction.

This disclosure provides an adaptive suspension load-reducing backpack system, including a back frame unit, a transmission unit, and an adaptive drive module. The adaptive drive module includes a drive unit, a variable stiffness unit, and a control unit located within the frame. The frame body is fixedly connected to the moving sub-frame of the back frame unit. The frame body has an external connection end fixedly connected to the gear of the transmission unit. The load transmitted by the transmission unit is connected through the external connection end, and the power provided by the drive unit is transmitted to the moving sub-frame. The drive unit includes a coaxial central shaft and a drive motor. The stiffness adjustment component in the variable stiffness unit changes the number of working turns of the coil spring according to the command of the control unit, and applies the load torque transmitted by the central shaft to the coil spring. The control unit controls the stiffness adjustment component and the drive motor according to the drive motor current and the central shaft rotation angle, so as to provide power to the moving sub-frame to maintain its target position while realizing adaptive adjustment to different loads. It has a wide adjustment range, is lightweight, and has low energy consumption.

The invention discloses a multi-point excitation dynamic load identification method, device and equipment and a computer readable storage medium. According to the method, in a multi-degree-of-freedom motion system model, a preset time domain is divided into a plurality of time periods, every m continuous time periods serve as a dynamic load recognition unit, N degrees of freedom exist in the multi-degree-of-freedom motion system model, and in the preset time domain, a dynamic load is applied to each of the m degrees of freedom, the m dynamic load force values are constant in one identification unit, and m is smaller than or equal to N; and aiming at each identification unit, solving the equation set based on the dynamic load force values, and calculating to obtain each dynamic load force value of the identification unit, so that the technical problem that each independent load is difficult to accurately separate and identify when facing a multi-source excitation problem is solved, and the technical requirement of a modern complex engineering structure on multi-load accurate identification is met.

This invention proposes an adjustable damping loading device to prevent jamming, comprising a damper, a reducer, a mounting bracket, an axial connector, an output shaft, an outer flange, and a pin assembly. The mounting bracket provides support and fixation for the loading device, the damper provides an adjustable load torque for the loading device, the damper is connected to the reducer through the axial connector and increases the load torque by a certain proportion, and the pin assemblies are installed axially on the outer flange, with the ends of each pin inserted into the bayonet at the end of the output shaft. The outer flange can be connected to the drive component to be loaded, the drive component drives the outer flange to rotate, and drives the output shaft and its damper to rotate through the pin assembly. The loading device provides an adjustable load torque for the drive component. This device can adapt to the radial runout generated during the movement process, and at the same time, the output shaft is driven by the pin assembly to start transmission. The non-rigid connection can effectively avoid the radial force on the output shaft and prevent jamming during the transmission process.

The application provides a rudder engine load test device and relates to the technical field of ship rudder engines, and comprises a mounting device, a self-adaptive load mechanism, a transmission head, a fixing screw one, a clamping groove seat and a clamping groove. The application has the characteristics of reasonable and simple structure, low production cost and convenient installation. Without customizing a complex connection structure for different types of rudder engines, the device can be quickly connected with the rudder engine through simple assembly design, greatly improving the universality and test preparation efficiency of the device, and reducing the equipment investment and maintenance cost. The application realizes the self-adaptive adjustment function of the load, can dynamically change the hydraulic oil input flow according to the rotating state of the rudder engine, makes the load force accurately match the rudder engine operation process, avoids the load mutation problem of the traditional rigid load structure, and effectively improves the authenticity and reliability of the test data.

The utility model belongs to the test technology, and relates to a loading test tool for an electric throttle mechanism. The device is characterized by comprising an encoder, a loading disc, a connecting sleeve, a supporting seat, an output shaft, a connecting rod, a mounting bracket, a weight and the like. The test tool is used for load test and stroke test of the electric throttle mechanism, and the design of the tool can ensure the coaxiality of the rotation center of the rocker arm of the electric throttle mechanism and a loading test part; load torque is provided by customizing weights, and the load torque is stable and reliable; the output shaft is connected with the rocker arm of the electric accelerator mechanism only through the connecting rod, the number of switching parts is small, the transmission gap is controllable, the stroke test accuracy is high, and repeatability is good.

The application relates to the field of crosslinked material testing, and discloses a multi-station creep tensile testing machine and a control method thereof. Through the arrangement of a connecting rod mechanism, a load is loaded on a cross arm through a steel cable, and the load on the cross arm acts on a vertical arm. The vertical arm can always keep parallel with a fixing frame. The force of the vertical arm on a main driving arm and a vice driving arm is always kept on the central axis of the vertical arm, so that the force arm of the load on both sides of the fixing frame remains unchanged and is not affected by the change of the position and direction of the load force, thereby guaranteeing the stability of the load during the loading process of the test piece. Through the arrangement of multiple test stations, multiple test pieces are independently tested and do not affect each other, so that the test of multiple test pieces can be completed on the same rack, the material test efficiency is improved, and the mechanical structure disclosed by the application occupies a small floor space and reduces the cost investment of the testing machine.

The invention provides an adjustable support. The adjustable support comprises a base, a force application part and a balance assembly, the balance assembly comprises a plurality of elastic parts and a transmission mechanism, the transmission mechanism is functionally coupled to the base and can move relative to the base, the elastic parts comprise the first elastic part and the second elastic part, and the force application part is used for applying force to the first elastic part. Each of the plurality of elastic pieces can apply a corresponding elastic acting force to the transmission mechanism; the force applying piece can apply load acting force to the transmission mechanism, and when the force applying piece is operated, the force applying piece or the elastic pieces drive the transmission mechanism to move to a target position; when the transmission mechanism is located at the target position, the elastic acting force and the load acting force are balanced, so that the transmission mechanism and the force application piece are in a stress balance state. The adjustable support can solve the problems that a constant force elastic assembly of an existing adjustable support is large in size, large in occupied space and high in cost.

In order to illustrate a transport device (1) in the form of a planar motor which enables a more efficient operation, according to the application it is provided that the transport units (TE) can be moved in two main directions of movement (H1, H2) with different efficiencies (μH1 > μH2) and / or different maximum forces and / or different accuracies in such a way that the drive coils (AS1, AS2) of the first and second coil groups (SG1, SG2) have different coil properties influencing the magnetic field and / or the drive magnets (4) of the transport units which interact with the drive coils (AS1) of the first coil group (SG1) have different magnet properties influencing the magnetic field than the drive magnets (4) which interact with the drive coils (AS2) of the second coil group (SG2), characterized in that the at least one transport section (2) is arranged in a position which deviates from the horizontal position in such a way that the force component of the load force acting on the transport units in the first main direction of movement (H1) is greater than the force component of the load force in the second main direction of movement (H2) when the transport device (1) is operated, wherein the load force at least comprises the transport unit weight of the transport units.