221 results about "Bearing design" patented technology

A gas-bearing centrifugal refrigerant compressor. A motor housing (1) and a gas outlet mechanism jointly form a main structure of the compressor. In the compressor, a motor stator (2) is powered on by means of an electric control system so as to drive a rotor (3) to rotate; the rotor (3) drives a first impeller (14) and a second impeller (15) to rotate; the first impeller (14) and the second impeller (15) do work on refrigerant gas entering a ventilation cavity; some gas leaks through mounting gaps of the first impeller (14) and the second impeller (15), passes through a sealing mechanism, and then enters between a gas bearing pack and the rotor (3); a gas film layer is formed when the rotor (3) rotates, achieving a gas bearing function; and the refrigerant gas entering a mounting cavity can cool the gas bearing pack. The compressor does not require an additional bearing gas supply system, simplifying the gas bearing design.

The invention discloses a self-balancing tilting-pad thrust bearing, and relates to the field of sliding bearing design. In order to solve the problems that when an existing thrust bearing is applied to the working condition that a mechanical rotor rotates at a high speed, the axis of the rotor is likely to deflect due to machining quality, self vibration and the like, then a bearing bush of the thrust bearing is stressed unevenly, unbalance loading is generated, and the service life of the thrust bearing is shortened. A double-layer balance block structure is adopted to automatically adjust the stress state of the thrust pads, so that each thrust pad is in uniform contact with the thrust disc, uniform stress among the thrust pads is realized, and the dynamic stability of a mechanical rotating system is improved; the thrust bearing structure can automatically adjust the problem of unbalanced stress between tilting pads of a sliding thrust bearing caused by manufacturing errors, assembly errors and stress states, the reliability and maintainability of the thrust bearing are improved, and the service life of the thrust bearing is prolonged. The invention is suitable for the technical field of thrust bearings.

The invention discloses an automatic measuring device and measuring method for dynamic and static friction torques of medium and large-sized bearings, and belongs to the technical field of bearing detection.The device comprises a bearing assembly, a moving plate is arranged on the bearing assembly, a rotating motor is connected to the bottom of the bearing assembly, and a driving shaft system is arranged on an output shaft of the rotating motor; the top end of the driving shaft system is provided with an inner ring fixing mandrel, the upper surface of the moving plate is connected with a torque sensor through an upper fixing frame, the bottom end of the torque sensor is provided with a measuring shaft system, the bottom end of the measuring shaft system is sleeved with a center adjusting assembly through two guide columns, the bottom of the center adjusting assembly is provided with an outer ring loading tool, and the outer ring loading tool is provided with an inner ring. Under the cooperation of the structure, not only can the dynamic friction torque be measured, but also the multi-point static friction torque can be automatically measured, more comprehensive bearing friction characteristic data are provided, and optimization of bearing design and model selection is facilitated.

An internal feedback hydrostatic bearing and a hydrostatic spindle structure relate to the field of bearing design. The problems that according to an existing hydrostatic bearing, hydraulic oil in an oil inlet cavity and an oil collecting cavity still easily enters a bearing oil cavity on the side, and consequently the rotating precision of a main shaft borne by the hydrostatic bearing is insufficient and unstable are solved. N pairs of throttlers are arranged, and the two throttlers in each pair are arranged on the two sides of the radial direction and / or the two sides of the axial direction of the main shaft correspondingly; each throttler comprises an oil inlet groove, an oil collecting groove and a bearing oil groove, the oil collecting groove surrounds the oil inlet groove, two opposite groove edges of the oil inlet groove are oil sealing edges, the other two opposite groove edges of the oil inlet groove are throttling edges, the throttling edges are configured to be gap throttling openings, and pressure oil in the oil inlet groove can be pressed into the oil collecting groove from the gap throttling openings; the peripheral groove edges of the oil collecting groove and the bearing oil groove are oil sealing edges, the oil collecting groove is communicated with the bearing oil groove of the other throttler, and pressure oil in the oil collecting groove is pressed into the bearing oil groove of the other throttler to achieve internal feedback.

The invention discloses an ultra-high-temperature heavy-load self-aligning roller bearing optimization design method and system based on a particle swarm algorithm, belongs to the field of rolling bearing optimization design, and solves the problems that a traditional bearing design process is low in efficiency, and multi-target collaborative optimization is difficult to achieve. And the design method combining the empirical formula and the finite element model is poor in precision due to the strong coupling characteristic of the material nonlinearity, the thermal coupling effect and the bearing performance under the ultra-high-temperature heavy-load working condition. The method comprises the following steps: S1, determining a bearing parameter, a working condition parameter and a particle swarm algorithm parameter; s2, establishing an optimization model of the ultrahigh-temperature heavy-load self-aligning roller bearing: S21, establishing a target function; s22, determining a design variable; s23, establishing a constraint equation; and S3, optimizing corresponding parameters of the bearing by adopting a particle swarm algorithm to obtain an optimization result. The method is suitable for a self-aligning roller bearing optimization design scene.

The invention relates to a temperature sensor integrated with a bearing and a preparation method and application thereof, and relates to the technical field of bearing diagnos.The temperature sensor comprises a multi-layer composite film resistance grid structure, and a composite film sequentially comprises a bearing substrate, a transition seed layer, an insulating layer, a sensing layer and a wear-resistant protective layer from inside to outside; by adding the transition seed layer between the bearing substrate and the insulating layer, the binding force between the insulating layer and the bearing substrate is enhanced, the probability of sensor failure caused by large difference of thermal expansion coefficients of the insulating layer and the bearing substrate is reduced, and the use effect of the sensor is improved; in-situ real-time temperature sensing is realized by adopting a scheme of coating a film on a bearing raceway, the scheme starts from the source of a fault, an intelligent diagnosis technology and criterion based on the temperature of a bearing contact area are formed, bearing fault detection methods are enriched, forward guidance is formed for bearing design, and the bearing fault detection efficiency is improved. And a new idea is provided for an aviation high-speed light-load bearing fault diagnosis technology.

The invention relates to the technical field of flywheel energy storage, in particular to a stability control method for a magnetic suspension flywheel energy storage system with time delay feedback. Determining axial bearing capacity and radial bearing capacity demand parameters of the flywheel energy storage device based on gravity and impact load of the flywheel rotor and centrifugal force and unbalanced force generated during high-speed rotation; according to the bearing capacity demand parameters, U-shaped stator structure design is carried out on the axial electromagnetic bearing, an inner ring and outer ring magnetic pole equal-area structure is adopted, the axial electromagnetic bearing is made of electrical pure iron, octupole electromagnetic bearing design is carried out on the radial electromagnetic bearing, and a stator and a rotor are made of silicon steel sheets formed through pressing; and carrying out temperature field distribution simulation analysis on the axial electromagnetic bearing and the radial electromagnetic bearing by adopting a bidirectional coupling mode of an electromagnetic field and a temperature field. The method further comprises the steps that an auxiliary bearing protection system is arranged, differential working mode control is adopted, and dynamic adjustment of the bearing capacity of the electromagnetic bearing under different working conditions is achieved by adjusting bias current and control current.

The present application provides an electric gas compression device, having an air compressor main body device, the air compressor main body device comprising: a motor, including a stator, a rotor and a main shaft fixed to the rotor; a first-stage centrifugal air compressor, arranged on a first side of the motor axis, the first-stage centrifugal air compressor including a first-stage double-sided impeller arranged at a first end of the main shaft; a second-stage centrifugal air compressor, arranged on a second side of the motor axis, the second-stage centrifugal air compressor including a second-stage double-sided impeller arranged at a second end of the main shaft, the second-stage double-sided impeller is coaxially arranged with the first-stage double-sided impeller, and when the motor is working, the intake pressure on the front and back sides of the first-stage double-sided impeller is the same, and the intake pressure on the front and back sides of the second-stage double-sided impeller is also the same, so that the axial forces offset each other, the flow range is wide, the difficulty of bearing design is reduced, the reliability is improved, and a high-compact design of the whole machine is achieved.

The invention provides a vertical water-turbine generator set guide bearing clearance adjustment calculation method and device, and relates to the technical field of bearing control, and the method comprises the steps: setting an azimuth angle in a coordinate system, selecting a center point from a main shaft, and marking a turning point; obtaining a guide bearing net throw corresponding to each turning point, a cosine value of an azimuth angle corresponding to the turning point and a sine value of the azimuth angle corresponding to the turning point, and calculating a one-time frequency X component and a one-time frequency Y component of a turning throw curve; and acquiring the central azimuth angle of the guide bearing bush and the total design clearance of the bearing, and calculating the adjustable clearance of each bearing bush of the guide bearing in combination with the first frequency multiplication X component and the first frequency multiplication Y component of the turning throw curve. The to-be-adjusted clearances of all the bearing bushes of the guide bearing are calculated according to the center azimuth angles of the bearing bushes of the guide bearing, the total design clearance of the bearing and the first-harmonic-generation X component and the first-harmonic-generation Y component of the turning throw curve, precise adjustment of the bearing bush clearances is achieved, unstable unit operation caused by too large bearing bush clearances is avoided, and the unit operation stability is improved.

The invention discloses a composite bearing load calculation method considering ferrule deformation. The composite bearing load calculation method comprises the following steps: step 1, enabling m rolling body rows to be equivalent to springs capable of bearing axial load, radial load and torque; constructing a non-rigid shaft system stress schematic diagram of the composite bearing; step 2, calculating the acting load on each inner ring according to the deformation of the mandrel; 3, calculating the Hertz contact deformation of the rigid ferrule under the loading condition; 4, calculating the contact deformation generated by the deformation of the ferrule; 5, solving the total radial deformation of the raceway contact considering the deformation of the ferrule; 6, calculating the load of the rolling body at the position by using the total deformation of the rolling body and the inner and outer ferrules; and 7, verifying the resultant force of each row of rolling bodies and the reliability of the external load borne by the bearing. According to the method, the acting load of each row of rolling bodies of the composite bearing is calculated, and load analysis is performed on the composite bearing under the condition of considering the deformation of the ferrule, so that a more accurate calculation result is obtained and applied to bearing design.

The invention relates to the technical field of steel structure construction, and particularly discloses a steel structure welding butt joint device for steel structure construction, which comprises a fixing structure, a first supporting structure and a second supporting structure, the fixing structure is detachably clamped on a bearing column or a cross beam of a steel structure, the first supporting structure is detachably arranged on the fixing structure, and the second supporting structure is detachably arranged on the bearing column or the cross beam of the steel structure. The first supporting structures can be located on the front side and the rear side or the left side and the right side of the fixing structure, the first supporting structures are used for bearing and limiting steel structures in butt joint, the second supporting structures are detachably arranged on the fixing structure, and the second supporting structures can be located on the front side and the rear side of the fixing structure. The two sides of one side of the H-shaped steel frame are clamped and locked through the clamping bases, and stable clamping is achieved; meanwhile, steel frames in various shapes such as a rectangular shape, a square shape and a round shape can be clamped, fixed and subjected to bearing butt joint limiting through the clamping and bearing design, and butt joint devices do not need to be independently arranged for the steel frames in different shapes and specifications.

The invention discloses a reinforced full-split electrocorrosion-resistant rolling bearing and a mounting method thereof, and relates to the technical field of full-split bearing design, the reinforced full-split electrocorrosion-resistant rolling bearing structurally comprises a split inner ring, an outer ring and a retainer roller assembly, the inner ring comprises a split inner ring I, a split inner ring II and a clamping ring, and the clamping ring is used for fixing the split inner ring I and the split inner ring II into a ring. Buckle structures for circumferentially fixing the first subdivision inner ring and the second subdivision inner ring are arranged at two joints of the first subdivision inner ring and the second subdivision inner ring, and each buckle structure comprises a protruding wedge-shaped structure arranged on the first subdivision inner ring and a groove structure arranged on the second subdivision inner ring and matched with the wedge-shaped structure; the first split inner ring and the second split inner ring slide relatively in the axis direction of the bearing so that clamping and separation of the buckle structure can be achieved. The retainer roller assembly comprises a roller, and the surface of the roller is provided with an insulating coating used for relieving electrochemical corrosion of the bearing. The technical problem that an application scene is limited due to the fact that an existing full-split bearing is low in use performance can be solved.

The invention relates to the technical field of sliding bearing design in mechanical engineering, in particular to a sliding bearing multi-mode end-to-end intelligent design system based on a large model. Comprising a multi-modal input and feature recognition module, a high-fidelity performance prediction module, a structural parameter intelligent optimization decision module and a parametric modeling and multi-modal output module which are connected in sequence and form an intelligent design closed loop, and all the modules are seamlessly connected through data interfaces. According to the method, multi-modal input and a high-fidelity simulation closed loop are driven through a large language model, the sliding bearing design efficiency is remarkably improved, the technical threshold is greatly reduced, interaction between a natural language and a drawing is supported, and non-experts can complete high-performance design; full-process automation from requirements to drawings is achieved, and manual intervention errors are avoided; optimizing in a wide-area parameter space by using the large model reasoning capability to realize multi-target global optimization; and multi-modal input and output of texts, drawings and models are supported, and the engineering applicability is enhanced.

The invention belongs to the field of bearing design theories, and discloses a full complement CARB bearing design method based on an elastohydrodynamic lubrication bearing model. The viscosity-pressure coefficient, the basic viscosity and the elastic modulus are integrated to oil film thickness calculation for the first time by establishing a joint objective function of the maximum dynamic load and the elastic flow lubrication minimum film thickness, and the dynamic load coefficient is adopted to correct the actual working condition deviation. A complete system containing 21 constraints is constructed, and five dimensions of geometric compatibility, contour matching, motion compensation, intensity life and manufacturing boundary are covered. The design variables including the curvature radius, the roller diameter and the pitch circle diameter are solved through a multi-objective optimization algorithm, collaborative maximization of the bearing capacity and the lubricating performance is achieved, and the problem that in a traditional design theory, curvature parameters are difficult to accurately determine is solved.

The invention discloses an aviation electric fuel pump design method based on structure optimization and intelligent control, belongs to the field of intelligent optimization design and control, and aims to optimize the structure of a gear pump, simplify the bearing design and neglect a diffusion area and an unloading groove, so that the gear pump better meets the quality requirement in practical application, and the gear pump design method is suitable for large-scale popularization and application. And a sparrow search algorithm is used for optimizing structural parameters, so that the quality and efficiency of the gear pump are improved. The spline is additionally arranged between the motor end and the gear pump end of the gear shaft, rotation isolation of the two ends is achieved, and the problem that the electric fuel pump is stuck in the to-be-loaded starting stage is effectively solved. By redesigning the shell and comprehensively considering the problems of weight, leakage, torque and the like, the overall design of the electric fuel pump is optimized. By adopting a super-spiral direct torque control method, rapid torque response and accurate flow control of the electric fuel pump are realized. According to the method, the gain parameters of the controller are optimized through the sparrow search algorithm, and the control precision and the steady-state performance of the system are improved.

The invention relates to an axial-radial bearing (1) for a machine tool, comprising an outer ring (2) provided for attachment to the machine tool and an inner ring (3) mounted axially and radially thereto via a plurality of rolling elements (4), which inner ring is provided for attachment to a drivable shaft washer (5), wherein the shaft washer (5) has a toothing (6). The invention also relates to a machine tool with such an axial-radial bearing (1) designed as a rotary table bearing.

The invention discloses a cylindrical roller modification method based on a non-uniform rational B-spline curve, and relates to the technical field of bearing design. According to the method, a bearing contact mechanical model considering the roller modification effect is constructed, a modification contour is constructed based on a non-uniform rational B-spline curve (NURBS curve), an optimization model with the basic reference rated life of a bearing as a target function is established on the basis of meeting geometric constraint conditions, and an optimization algorithm is adopted for solving to obtain a final modification curve. The established contact mechanical model comprises a bearing static balance model and a roller-raceway contact mechanical model and is used for calculating load distribution and contact stress under the unbalance loading working condition. Compared with a traditional symmetrical logarithmic modification method, the problem that the axial stress of the roller is not uniform under unbalance loading can be effectively solved, the uniformity of contact stress distribution is improved, and the fatigue life of the bearing is prolonged.

The invention discloses a decoupling design method and system for reliability optimization of an angular contact ball bearing. The method comprises the following steps: determining initial design parameters of the angular contact ball bearing; constructing a reliability optimization design model which takes maximization of the rated dynamic load as a target and comprises probability reliability constraint processed by a penalty function; constructing a design variable and failure probability mapping agent model, specifically, identifying and quantifying uncertainty parameters, constructing a quasi-statics model and a limit state function, calculating the failure probability of a sample point through a probability reliability method, and training the agent model taking the design variable as input and the failure probability as output; and based on the proxy model, solving the reliability optimization design model by using an optimization algorithm, and outputting optimal bearing design parameters. According to the method, the reliability analysis process and the optimization iteration process are decoupled, so that the optimization efficiency is greatly improved while the design robustness is ensured.

The invention belongs to the technical field of computer aided design and mechanical engineering, and relates to a parameterized three-dimensional automatic modeling and assembling system and method for a rolling bearing. The system comprises a parameter input module used for obtaining bearing design parameters; the part modeling module is used for generating an inner ring model, an outer ring model, a rolling body model and a retainer model which comprise preset assembly reference surfaces according to the parameters; the assembly logic module is used for automatically positioning the respective three-dimensional models of the multiple parts of the rolling bearing in a three-dimensional space and constructing a complete bearing assembly so as to generate a complete rolling bearing; and the auxiliary function module is used for providing model file management, modeling process visualization and data output functions. The method has the beneficial effects that the traditional dependence on a solid geometric surface is replaced by abstract association of the reference surface and the coordinate system, and high automation, stabilization and parameterization of the modeling and assembling process are realized.

A special-shaped bearing ring, a raceway diameter measuring mechanism and an auxiliary tool are included, the special-shaped bearing ring comprises a small outer circle, one side of the small outer circle is connected with a flange end face, a large outer circle is arranged on the outer wall of the flange end face, and the large outer circle is connected with the raceway diameter measuring mechanism. An arc-shaped blade shoulder is arranged at the joint of the flange end face and the small outer circle, an arc-shaped groove and a U-shaped groove are formed in the bottom of the flange end face at the same time, the arc-shaped groove extends to the small outer circle, and a roller path is arranged on the inner wall of the small outer circle in a surrounding mode; comprising the following specific steps that S1, turning is conducted, specifically, the rough shape of the bearing is turned; s2, soft grinding of double end faces; s3, softly grinding an outer circle; s4, turning a large hole; according to the machining and manufacturing method of the special-shaped bearing ring with the flange, the bearing strength can be enhanced and the machining precision can be guaranteed at the same time by improving the bearing design and the machining process.

The invention discloses a sliding bearing structure of a wind power partitioned elastic trapezoidal main shaft. Comprising a segmented sliding bearing design, and trapezoidal cross-section staggered structures are symmetrically arranged between contact surfaces of a bearing unit and a main shaft. Aiming at the problems of weak self-aligning capability, concentrated contact stress and the like caused by insufficient elastic compensation of a wind power main bearing under high load, optimization is realized through the following innovations: a trapezoidal structure is additionally arranged on the contact surface of a block bearing, and the overall radial compliance of the bearing is enhanced by utilizing the elastic deformation characteristic of a trapezoidal cross section staggered structure; the elastic units are distributed in a gradient mode in the circumferential direction, a self-adaptive oil film pressure field is formed by combining the elastic units with the stepped lubricating flow channels, and the unbalance loading compensation capacity and the dynamic pressure lubricating efficiency of the spindle are synchronously improved. The gaps promote heat dissipation circulation and discharge of abrasion chippings, and local abrasion is avoided. By means of the structure, when the main shaft is strongly bent or moves, displacement deviation is absorbed through deformation of the elastic units, the self-aligning angle is increased, the contact stress peak value of the edges of the partitioning units is reduced, and the eccentric wear risk is reduced.

The invention relates to an axial permanent magnet suspension bearing based on electromagnetic suspension and a control system thereof, the axial permanent magnet suspension bearing comprises an axial permanent magnet suspension bearing stator, an axial permanent magnet suspension bearing rotor, a load, an axial permanent magnet bearing and two radial electromagnetic bearings, the axial permanent magnet suspension bearing rotor and the radial electromagnetic bearings are both mounted in the axial permanent magnet suspension bearing stator; the axial permanent magnet bearing is installed on the axial permanent magnet suspension bearing rotor, the axial permanent magnet suspension bearing rotor is connected with a load, the axial permanent magnet suspension bearing rotor penetrates through the radial electromagnetic bearings and the axial permanent magnet bearing, and the radial electromagnetic bearings are located on the two sides of the axial permanent magnet bearing. Axial suspension is realized through relative movement among a plurality of annular permanent magnets of the axial permanent magnet bearing. The radial control of the axial permanent magnet suspension bearing is realized, so that the axial permanent magnet suspension bearing designed based on a permanent magnet array suspension structure can work in an optimal suspension gap, and the buoyancy-weight ratio is greatly improved in the axial direction.

The utility model discloses a novel plastic uptake tray which comprises a plastic uptake tray body, a plurality of storage grooves are arranged on the plastic uptake tray body in an array mode, reinforcing ribs are arranged on connecting portions between the storage grooves, and reinforcing rings are arranged on two sides of an edge skirt on the periphery of the plastic uptake tray body. The plastic uptake disc has the advantages that the reinforcing ribs and the reinforcing rings are additionally arranged, and the overall strength of the plastic uptake disc is improved. Due to the bearing design of the concave part, product deformation caused by dish collapse is effectively reduced; on the basis of effectively reducing the thickness of raw materials and saving the cost, the product packaging requirement can be met. After the technology is put into use, the strength of the blister tray is increased, and the material cost is reduced by three percent.

The motor comprises a stator, the middle part of the outer wall of the stator is sleeved with a housing, the back end of the housing is provided with a rear end cover, the inner wall of the stator is sleeved with a rotor, the middle part of the inner wall of the rotor is provided with a connecting rod in a penetrating manner, and the back end of the outer wall of the connecting rod is sleeved with the middle part of the front end of the rear end cover. The front end of the shell is fixedly connected with a fixing frame, and the fixing frame is used for supporting connection of a connecting rod. The first bearing groove and the second bearing groove are designed in the first rotating bearing and the second rotating bearing of the connecting rod to support the connecting rod to rotate, the fixing frame is designed at the front end of the shell, the first bearing groove is formed in the middle end of the fixing frame, and the connecting rod penetrates through the fixing frame and is sleeved with the first rotating bearing according to the lever principle. The connection between the connecting rod and the shell and the stator is enhanced, so that the connecting rod and the rotor are stable in the operation process, the friction force between the shell and the stator is reduced, and the operation efficiency of the motor is improved.

The invention belongs to the field of bearing manufacturing, particularly relates to a comprehensive stress analysis and calculation method for a main bearing of a shield tunneling machine, and mainly provides a comprehensive stress analysis and rapid calculation method for the design and checking process of the main bearing of the shield tunneling machine. According to the method, the force generated by the bolt, the contact force between the roller and the raceway surface, the contact force between the flange surface and the ferrule and the calculation method of the external force borne by the system are determined, the stress forms a resultant force matrix, a nonlinear equation set is solved to obtain a displacement matrix, and finally the bearing condition of each stress unit is obtained. According to the method, factors such as clearance, roller shaping and ferrule compression are considered, and the influence of interaction among the units on the bearing conditions of the units is considered, the stress conditions of the rollers, the bolts and the contact surfaces can be simply and quickly calculated, and a basis is provided for design and check of the main bearing of the shield tunneling machine.

The invention relates to a multi-layer combined type lifting frame which comprises a lifting frame body, positioning inserting rods, bearing partition blocks and partition plate assemblies, a containing space is formed in the lifting frame body, and the partition plate assemblies are arranged in the containing space and connected into the lifting frame body through the positioning inserting rods and the bearing partition blocks. Hoisting holes are formed in the two sides of the hoisting frame body. The lifting frame provided by the invention is flexible in transfer mode, a crane or a forklift can be freely selected for discharging, and the operation convenience and efficiency are improved; the partition plate adopts five-point bearing design, so that the structural stability is high, collapse deformation of the partition plate at high temperature is avoided, and tool damage, maintenance cost and downtime are reduced; due to the split type adjustable design of the bearing spacer blocks, the workpiece charging adaptability is high, the layout can be adjusted according to different workpiece heights, and the charging space utilization rate and the production efficiency are improved.

The invention belongs to the field of bearing design, and particularly relates to a bearing gland nut anti-rotation structure which comprises a rotating shaft, a bearing, an annular clamping ring and a nut. The bearing, the annular clamping ring and the nut are coaxially arranged with the rotating shaft, the nut is in threaded connection with the rotating shaft, an inner ring of the bearing is fixedly connected with the rotating shaft, the corresponding side of the annular clamping ring is clamped and matched with the clamping groove, and the other side of the annular clamping ring is mechanically locked with the nut; the annular retainer ring is nitrided near the side surface of the bearing. Rectangular grooves and arc-shaped grooves are formed in the nut in a staggered mode, clamping blocks are arranged on the side wall of the annular clamping ring, the clamping blocks correspond to the rectangular grooves and the arc-shaped grooves, and the clamping blocks are matched with the rectangular grooves and the arc-shaped grooves in a clamped mode. In the working process, the annular clamping ring, the nut and the shaft are combined to prevent rotation, and an original T-shaped locking piece is replaced to prevent rotation; the side surface, close to the bearing, of the annular retainer ring is nitrided to improve wear resistance; through the measures, the reliability of the anti-rotation structure is ensured.

A motor vehicle drive system has a traction transmission device. A traction transmission drive shaft is rotatably mounted in a transmission device housing. A traction transmission intermediate shaft is rotatably mounted in the transmission housing. A traction transmission output shaft is rotatably mounted in the transmission housing device, and is arranged axially parallel to and radially spaced apart from the two other traction transmission shafts. The motor vehicle drive system is characterized in that three traction transmission shafts are each mounted in the traction transmission housing device with a fixed / floating bearing, these bearings each having a fixed bearing for absorbing axial forces and at least one floating bearing designed exclusively to absorb radial forces. The three fixed bearings are mounted in the traction transmission cover, and at least three of the floating bearings are mounted in the traction transmission housing.

A cover device (24) for a working machine (10) that is movable between an open and closed position, comprising: a panel (38) for covering an area of ​​the working machine (10), a support (32) for attachment to a supporting frame (12) of the working machine (10), a pivot arm (44) which is connected to the panel (38) by a first pivot bearing (46) and to the support (32) by a second pivot bearing (48), and a guide arm (50) which is connected to the panel (38) and the support (32) by a third pivot bearing (52) and a fourth pivot bearing (66), wherein the axes of rotation of the pivot bearings (46, 48, 52, 66) are oriented parallel to each other, characterized in that the fourth pivot bearing (66) is designed as a combined sliding and pivot bearing (66).

The utility model discloses a friction-free torsion spring flexible bearing, and belongs to the field of bearing design. The utility model solves the technical problem that the working efficiency of a device for installing the existing bearing is low as the rolling body and the ferrule are rubbed and cannot swing back and forth repeatedly due to the structure of the existing bearing. The supporting ring and the rotating ring are the same in shape. The supporting ring comprises a first sleeve ring and a first connecting semi-ring, and the first sleeve ring fixedly sleeves the left part of the first connecting semi-ring; the rotating ring comprises a second lantern ring and a second connecting semi-ring, and the second lantern ring fixedly sleeves the right part of the second connecting semi-ring; the supporting ring and the rotating ring are installed in a sleeved mode, and the supporting ring and the rotating ring are crossed and aligned in the axial direction and can relatively rotate in the vertical circumferential direction. The center spring piece is installed in the center of the interior of the supporting ring and the rotating ring which are installed in a sleeved mode, the rotating ring is connected with the supporting ring through the center spring piece, and then relative swinging of the rotating ring and the supporting ring is achieved. And the working efficiency is improved, the service life is prolonged, and the mechanical rotating body is supported.