186 results about "Gear wear" patented technology

The invention discloses a use monitoring method and system for a knife gate valve, and relates to the technical field of knife gate valve monitoring, and the method comprises the steps: integrating a multi-mode sensor array at the root of a valve rod of the knife gate valve, an adjacent region of a sealing surface and in a valve cavity flow channel, and collecting multi-source signals in real time; performing dynamic fusion processing on the multi-source signal, and determining a feature extraction algorithm combination based on the current valve rod temperature and historical working condition data to extract a sealing surface damage feature, a transmission chain wear feature and a particle impact feature; constructing a dynamic anomaly judgment model, updating a clustering boundary of a vibration and torque characteristic space in real time, and performing decoupling diagnosis on a sealing surface dry friction risk, thread clearance expansion and gear wear in combination with time-frequency domain fluctuation analysis of a gear meshing frequency harmonic attenuation rate and an angular acceleration; and generating a three-level maintenance strategy according to the diagnosis result, dynamically adjusting the output torque of the execution mechanism and optimizing the switching frequency of the valve.

The invention belongs to the technical field of gear health state evaluation, and discloses a vibration signal-based gear wear area monitoring method under a variable speed condition, which comprises the following steps of: acquiring a vibration signal of a gear, and calculating a time-frequency distribution signal of the vibration signal based on multiple synchronous extraction transformation; phase information is extracted from the time-frequency distribution signal, and then an angular domain signal is obtained through angular domain resampling; segmenting and aligning the angular domain signal according to the fault period of the gear to obtain a deterministic component related to gear wear; the deterministic component is optimized through a Savitzky-Golay filter, and then an order spectrum and a comprehensive order band energy ratio are calculated; according to the method, the accumulated comprehensive energy ratio index is used for evaluating or monitoring the wear area of the gear, so that the wear severity degree is quantitatively evaluated, the wear area of the gear can be accurately and quantitatively evaluated under the condition of variable rotating speed, and the accuracy and the reliability of the gear are improved. And accurate monitoring and evaluation of gear wear are realized.

The invention relates to the technical field of gear detection, in particular to a gear wear detection method and system of a gear motor. According to the method, firstly, all fault characteristic frequencies are obtained based on historical vibration signals of a fault gear, then vibration signals of a to-be-detected gear are divided into a plurality of local impact sub-segments, and the local frequency spectrum of each local impact sub-segment and the kurtosis of each frequency in the local frequency spectrum are obtained; fitting a fuzzy estimation signal of the vibration signal in combination with power distribution under each fault characteristic frequency in the time-frequency spectrum, and then modulating the vibration signal in combination with a motor load condition; and finally analyzing a frequency spectrum signal of the modulation vibration signal, and evaluating the early wear type of the gear to be detected. According to the method, the vibration signal is modulated by analyzing the covering interference of noise and motor load on local wear impact, and the frequency modulation effect and the amplitude modulation effect are further analyzed in the frequency domain of the modulated vibration signal, so that the early wear type is accurately distinguished, and the gear wear detection effect is improved.

The invention relates to the related technical field of torque detection, in particular to a gear pump output torque fluctuation online detection method and system.The method comprises the steps that operating parameters such as gear pump vibration acceleration are collected, threshold values such as the pressure change rate and a gear rotation vector are combined to draw up a characteristic matrix, and a torque pulsation mode is recognized; and configuring a fluctuation stability factor correlation model weight, determining a torque fluctuation grade and performing graded reminding. The method solves the technical problems that the characteristic change of early faults such as gear wear and cavitation is not sensitive, the torque fluctuation cause cannot be determined, the fault diagnosis is lack of depth, and the risk of sudden equipment faults is increased, realizes the accurate capture of a complex fluctuation mode, and determines the fault diagnosis accuracy according to a closed volume pressure change rate threshold and an unloading groove cavitation critical value. The technical effects that the gear pump closed volume pressure change, the unloading groove cavitation effect and the mechanical vibration cooperative influence are quantified, the torque fluctuation grade is determined through early-stage accurate recognition of faults, and graded reminding is conducted are achieved.

The invention relates to the technical field of tractor power system fault diagnosis, and discloses a method and system for remotely diagnosing a power system fault of a tractor, and the method comprises the steps: monitoring a vibration signal, a sound signal and a temperature signal of a transmission gear of the tractor; extracting a frequency domain feature, a Mel frequency cepstrum coefficient feature and a temperature change trend feature of the vibration signal; carrying out weighted fusion on the signal features by adopting a dynamic weighting mechanism; constructing a fault prediction model based on an XGBoost algorithm, and outputting the gear wear degree and the fault occurrence time; and generating a fault early warning and transmitting the fault early warning to a mobile terminal APP and a cloud platform through an LTE or 5G network. Compared with a traditional fault diagnosis method in the prior art, particularly under the condition of dynamic working conditions, the technical problem that efficient and accurate fault diagnosis of the tractor power system is difficult to realize is solved, and the accuracy and response efficiency of fault diagnosis are improved by combining the convolutional neural network and the XGBoost algorithm.

An electric power train includes an electric drive, an electric motor driven by the electric drive, and a meshing pair of a drive gear and a driven gear. The drive gear is coupled to the electric motor and the driven gear is coupled to a mechanical load. The backlash of the meshing pair of the drive gear and the driven gear is measured and estimated based on a time until a contact of teeth of the rotating drive gear and the driven gear during a startup of the electric motor. Wear of the meshing pair of the drive gear and the driven gear based on a change in the measured backlash over time during the operation of the electric power train.

The invention relates to a quasi-static straight gear wear numerical analysis method, and belongs to the technical field of mechanical engineering. The method comprises the following steps: calculating a dynamic wear coefficient by using a mixed lubrication model; the contact pressure and the sliding distance are calculated in an integral form, a straight gear quasi-static numerical wear model is established by using matlab software with the help of an Archard formula, and a wear value is calculated; the influence rule of the modulus, the torque and the tooth width on the abrasion loss is obtained, and meanwhile the significance of the influence of the three factors is analyzed through an orthogonal experiment method. Compared with the prior art, the method has the advantages that the problem that the calculation of the contact pressure is greatly influenced by the grid units is researched and solved, so that the obtained contact pressure value is more accurate, and the tooth surface wear is reduced according to the rule and significance analysis of the influence of various factors.

The invention discloses a dual-function large gearbox gear wear scrap iron particle monitoring transmitter which comprises a monitoring module and a transmitting module, the monitoring module comprises a sensor probe and an installed magnet, and is provided with a sensor plate, a Hall magnetic sensing element and a temperature platinum resistor, and the transmitting module comprises a shell. A conditioning circuit board is arranged in an inner cavity of the shell. The invention relates to the technical field of scrap iron monitoring. According to the dual-function large-scale gearbox gear abrasion scrap iron particle monitoring transmitter, when fallen scrap iron is adsorbed through the sensor, the magnetic quantity of the sensor changes slightly, the transmitting module conducts conditioning according to a change signal of the sensor and converts the change signal into a digital signal or an analog signal, and then the signal value is output to an acquisition end; and through an area algorithm averaging mode, the current condition of the scrap iron content of the gear box can be observed in real time, and the running health state is monitored in real time.

The utility model discloses a four-shaft double-planet stirring machine which comprises a shell component, a base component, a rack lifting component, a transmission component, a cylinder score component, a cylinder cover component, a dispersing component, a stirring component, an electric appliance control component and a planet carrier component, the planet carrier component comprises a bearing seat, the inner wall of the bearing seat is in flange connection with an inner shaft and an outer shaft, the circumferential outer wall of the tail end of the outer shaft is fixedly connected with a fixed star stirring gear and an upper connecting plate, the circumferential outer wall of the tail end of the inner shaft is fixedly connected with a fixed star dispersing gear and a lower connecting plate, and the outer wall of the fixed star dispersing gear is meshed with an intermediate gear; supporting shafts penetrating through the lower connecting plate are symmetrically and fixedly connected to the outer wall of the bottom of the upper connecting plate, a sealing cylinder is fixedly connected to an inner cavity of the shell component, and the bearing seat is fixedly connected to an inner cavity of the sealing cylinder. The device has the advantages that high viscosity can be efficiently mixed and dispersed, the stability and uniformity of materials are guaranteed, the torque is more balanced, and gear abrasion is reduced.

The invention relates to a device for detecting the abrasion loss of a hump speed reducer for a railway station, which is characterized in that when a wheel passes through a main track, the rim of the wheel is in contact with the upper end of a detection elastic sheet, the detection elastic sheet is pressed to move downwards, a total connecting rod of the detection elastic sheet and a main arm move to the lower position, and a conical head at the lower end of the main arm is clamped in a right-angle clamping groove between two groups of clamping seats; the clamping hook is in limiting fit with the limiting clamping groove of the detection elastic sheet main connecting rod through the clamping hook insertion hole; the contact piece moves to one side close to the detection elastic piece; when a wheel passes through the main track, the width of an opening between the two clamping seats is increased, clamping of the main arm is relieved, the main arm ascends and resets, the clamping hook moves outwards to the position separated from the limiting clamping groove, limiting of the detection elastic piece total connecting rod is relieved, the detection elastic piece total connecting rod moves to the upper portion, and the synchronous contact piece moves outwards to the position tightly attached to the speed reducer friction piece. The distance from the hump speed reducer to the rail head is obtained through scales on the scale rod, and the abrasion loss of the hump speed reducer is obtained by subtracting the two distances from the hump speed reducer to the rail head. According to the invention, accurate detection of the abrasion loss can be realized.

The invention relates to a working condition following gear wear monitoring and predicting method based on a vibration signal, belongs to the technical field of gear transmission, and solves the problem that influence of different working conditions and different wear states of different positions of a gear cannot be considered in gear wear monitoring and prediction in the prior art. Comprising the following steps: S1, establishing a working condition Map graph based on dynamic working condition division of multi-source sensor fusion, and updating the working condition Map graph in real time; s2, establishing an Archard wear correction model, and calculating the wear extent of the gear; s3, establishing a gear nonlinear vibration model considering wear and clearance influence, and solving a vibration signal of a gear system; s4, a CNN-LSTM mixed wear diagnosis model is established, and training is carried out; and S5, acquiring and processing in real time to obtain a vibration signal of the gear system, and inputting the vibration signal into the CNN-LSTM mixed wear diagnosis model to obtain the current wear state probability distribution of the gear and the wear development trend prediction of the gear.

The invention discloses an electric slewing mechanism safety control method and system based on fault prediction, and the method comprises the steps: obtaining time series data including the motor winding temperature of an electric slewing mechanism, the U, V and W three-phase current of a motor, the rotating speed of the motor, the torque of the motor, and the X, Y and Z three-direction vibration acceleration of a transmission shaft, and corresponding fault type labels; constructing to obtain a training data set; wherein the fault types comprise motor over-temperature, motor overload, motor stalling, gear wear and output shaft breakage; training the LSTM network by using the training data set to obtain a trained LSTM network model; based on the trained LSTM network model, electric slewing mechanism fault prediction is carried out, a fault prediction result is obtained, and the fault prediction result comprises the probability value of each fault type; and performing fault grading processing according to the fault prediction result.

The invention relates to the field of machinery, in particular to a drum type rotary filter screen driving device. According to the device, a power output gear is meshed with a first transmission gear and a second transmission gear at the same time; the first transmission gear, the second transmission gear and the power output gear are all installed on the gear disc. The chain disc is connected with the replacement control gear through a transmission chain; the replacement control gear drives the gear disc to rotate; the laser sensor monitors the states of the first transmission gear and the second transmission gear; the water pipe is erected above the drum-shaped filter screen rack; a high-pressure nozzle is arranged at the end of the water pipe; an angle adjusting unit is arranged at the joint of the high-pressure nozzle and the water pipe; the lubricating oil nozzle is arranged in a gap between the first transmission gear and the power output gear; and the control unit is used for receiving the gear abrasion loss information of the laser sensor and starting water filling, transmission gear replacement or lubricating oil adding of the lubricating module. According to the invention, the service cycle is prolonged, the drum net out-of-service time is reduced, and the reliability of equipment is ensured.

The invention discloses an offshore wind turbine generator gearbox fault diagnosis method based on a knowledge graph, and relates to the technical field of intelligent fault diagnos.The offshore wind turbine generator gearbox fault diagnosis method based on the knowledge graph comprises the following steps that in the operation process of a wind turbine generator, sound wave data of a gearbox are collected through a preset sampling period; and a stable signal acquisition framework is established, and original signal input is provided for subsequent data processing. By dynamically adjusting the sampling frequency, early recognition and accurate diagnosis of potential faults of the gear box are achieved, and the operation reliability and maintenance efficiency of a wind turbine generator are effectively improved. Tiny noise changes are captured through dynamic sampling, gear abrasion is found in time, and fault deterioration is prevented; when stable, the sampling frequency is reduced to optimize resource utilization. Machine learning and a knowledge graph are combined, complex operation conditions are adapted, the fault diagnosis precision is improved, the service life of equipment is prolonged, and the maintenance and shutdown cost is reduced.

The invention provides a hidden Markov prediction compensation method and system for gear wear evolution, and belongs to the technical field of gear transmission, and the method comprises the steps: constructing a hidden Markov chain of a gear wear state-compensation parameter, building an encoder coding-decoding frame in a gear compensation system, extracting a hidden Markov chain state sequence by using an encoder, and carrying out the coding-decoding of the hidden Markov chain state sequence. A decoder is used for feeding back a prediction result to the compensation module; the observation sequence of the hidden Markov chain is substituted into the trained hidden Markov model, a corresponding state sequence is obtained, and life end point prediction is carried out; the state sequence is converted into an end-of-life prediction curve, and an optimal end-of-life value with the shortest distance between a prediction value and a target is searched in a pre-drawn compensation optimization solution space to serve as a reference wear state; and the reference wear state is substituted into an encoder in the hidden Markov chain, encoding curve parameters are obtained, parameter optimization is carried out on a compensation curve, and a traditional passive response strategy is converted into an active prevention strategy.

The invention discloses a lubricating structure for a planetary gear set and a filter, and the lubricating structure for the planetary gear set comprises a planet carrier, a rotating shaft connected with an eccentric sun gear in a sleeving manner, a planetary gear engaged with the eccentric sun gear and rotatably mounted on the planet carrier, and a lubricating assembly arranged in the inner wall space of the planet carrier, the lubricating assembly comprises a control part and an extrusion part, and when the rotating shaft rotates, the control part is used for driving the extrusion part to directionally convey lubricating oil to the eccentric sun gear through the extrusion pipe and transmitting the lubricating oil to the planetary gear through the rotating motion of the eccentric sun gear, so that automatic lubrication between the eccentric sun gear and the planetary gear is achieved. Automatic lubrication between the eccentric sun gear and the planetary gear can be achieved, the problems that lubrication is insufficient, gear abrasion is accelerated and the like due to the fact that workers forget to add lubricating oil due to negligence are solved, and regular inspection of workers is not needed; the service life of the planetary gear set is prolonged, and the reliability and stability of equipment operation are improved.

The invention discloses a gear abrasion testing machine and a testing method, and relates to the technical field of gear testing equipment. Real working conditions can be highly simulated, and the gear and the lubricating oil can be subjected to integrated collaborative testing. The testing machine comprises a gear accompanying test box, a gear test box, a first shaft system and a second shaft system, the first shaft system comprises an accompanying test pinion mounting shaft and a test bull gear mounting shaft; the accompanying pinion mounting shaft is fixedly connected with an accompanying pinion; the test bull gear mounting shaft is fixedly connected with a test bull gear; two ends of the accompanying test pinion mounting shaft are respectively connected with the driving motor and the test bull gear mounting shaft; the second shaft system comprises an accompanying test bull gear mounting shaft, a torque sensor, a loading clutch and a test pinion mounting shaft; an accompanying test bull gear is fixedly connected to the accompanying test bull gear mounting shaft; the test pinion mounting shaft is fixedly connected with a test bull gear; the loading clutch is used for applying and locking static torque; the invention further discloses a testing method based on the testing machine.

The invention discloses a fan main gear wear degree diagnosis method and system, and the method comprises the steps: carrying out the collection and normalization processing of a gear oil moisture value and a 40 DEG C kinematic viscosity data value, and obtaining a gear oil moisture normalization value and a 40 DEG C kinematic viscosity normalization value of the gear oil; acquiring and normalizing the acid value of the gear oil and the contents of iron, copper and phosphorus in the gear oil to obtain normalized values of the acid value, the content of the iron element, the content of the copper element and the content of the phosphorus element of the gear oil; performing weighted summation on the normalized values of the moisture of the gear oil, the kinematic viscosity of the gear oil at 40 DEG C, the acid value, the iron element content, the copper element content and the phosphorus element content to obtain a gear wear index; according to the gear wear index, judging whether the gear wear degree of the main gear box affects use and wear degree grades, and giving corresponding suggestions; the method has the advantages that the abrasion degree can be truly and reliably reflected, and stable and safe operation of the whole wind driven generator is guaranteed.

The application discloses a drive system fault analysis method and system based on motor current ripple, and relates to the field of electric bicycle drive state monitoring. The method comprises the following steps: collecting motor stator current signals, rotating speed, electric angle and environmental working condition parameters synchronously, removing noise interference by combining adaptive filtering technology, and extracting target ripple signals carrying load information; based on the physical parameters of the motor and the structure of the drive system, a dynamic coupling model is constructed to generate theoretical reference ripple signals under normal and multiple fault states; by comparing the measured ripple signals with the reference signals, system deviation information is obtained, and a composite fault feature vector is further extracted; finally, the feature vector is mapped to a fault mode library to accurately identify fault types such as gear wear, chain slack or bearing defects. Thus, through real-time analysis of the motor current ripple, the health monitoring capability of the electric bicycle drive system and the driving safety are effectively improved.

The utility model relates to the technical field of motors, and discloses a gear motor capable of slowing down gear wear, which comprises a mounting seat and a driving motor, a side cover is fixedly mounted on the left side of the mounting seat through a bolt piece, a sealing washer is arranged between the side cover and the mounting seat, and an inclined hole is formed inside the front end of the mounting seat. When the gear motor capable of slowing down gear wear is used, after the gear motor is closed, the arranged connector can be screwed out from the outside of the threaded opening at the front end of the mounting seat, and after the insertion strip is pulled out from the inside of the fixed seat, the remaining amount of oil in the mounting seat can be determined directly through the oil adhered to the insertion strip; and after oil liquid lacks, the oil liquid can be added in time through the fixed seat, so that the gear set can be conveniently lubricated, the abrasion of the gear assembly in the gear motor is slowed down, and the problem that no measures can be taken to slow down the abrasion of the gear assembly in the gear motor is solved.

The dynamic lubrication type cycloid speed reducer comprises a base, a supporting seat is fixedly installed in the middle of the upper surface of the base, a protective sleeve is arranged on the upper portion of the supporting seat, a speed reduction gear module is arranged in the protective sleeve, and a filtering assembly is installed at the position, located at one end of the protective sleeve, of the upper surface of the base. An oil pumping assembly is mounted at the other end of the protective sleeve on the upper surface of the base; the filtering assembly and the oil pumping assembly are both communicated with the protective sleeve. According to the dynamic lubrication type cycloid speed reducer, an innovative lubrication circulation system is combined with a multi-stage cycloid speed reduction structure, the transmission efficiency is remarkably improved, and the service life is remarkably prolonged. The lubricating device has the core advantages that a closed-loop lubricating system composed of the filtering assembly and the oil pumping assembly is adopted, lubricating oil continuously and circularly flows in the protective sleeve, impurities are effectively removed through multi-stage filtering of the filtering cotton, the liquid separation plate and the porous filtering material, the cleanliness of the lubricating oil is kept, and gear abrasion is greatly reduced.

The utility model relates to the technical field of thickener lubrication, in particular to a transmission gear lubricating device of a peripheral transmission thickener, which comprises a thickener body, a bracket is arranged at the upper end of the top surface of the thickener body, two guardrails are symmetrically mounted on the top surface of the bracket, an arc-shaped groove is formed in the edge of the bracket, and the arc-shaped groove is communicated with the bracket. A plurality of travelling wheels are arranged in the arc-shaped groove, a rotating shaft is fixedly arranged in the middle of each travelling wheel, two connecting blocks are rotationally connected to each rotating shaft in a symmetrical structure, the top surfaces of the two connecting blocks are fixedly connected with the bottom surface of the bracket, and the outer walls of the travelling wheels are in frictional contact with the top surface of the concentration tank body. A motor is installed at the position, close to the edge, of the top face of the bracket through an installation base, and a speed reducer is coaxially connected to an output shaft of the motor. By the adoption of the structure, friction and abrasion during meshing are reduced, transmission efficiency is improved, the amount of sprayed lubricating oil is controlled more accurately, waste of the lubricating oil is reduced, gear abrasion caused by insufficient lubrication is avoided, and reliability is improved.

The utility model provides a novel lubricating speed reducing mechanism of a gearbox speed reducer, and belongs to the technical field of speed reducers. The gear box speed reducer solves the problems that in the meshing process of gears of an existing gear box speed reducer, products are abraded, the service life is short, and the replacement frequency is high. The novel lubricating speed reducing mechanism of the gearbox speed reducer comprises a transmission shaft arranged in the speed reducer, a large gear with a plurality of gear tooth parts is arranged on the transmission shaft, a transmission seat assembly is tightly arranged at the position, adjacent to the large gear, of the transmission shaft, and the transmission seat assembly is composed of a first transmission seat and a second transmission seat which are connected with each other. The first transmission seat and the second transmission seat are each provided with a notch, the two notches form an installation groove, a limiting disc is installed in the installation groove, the limiting disc is provided with an L-shaped fixing rod extending outwards, and the tail end of the L-shaped fixing rod is provided with a lubricating mechanism for spraying oil to the gear tooth part. The utility model has the advantages that the transmission wear is reduced, and the service life is prolonged.

The utility model provides a novel gear shaft, and belongs to the technical field of transmission structures. The problem of transmission abrasion of an existing gear shaft is solved. The novel gear shaft comprises a transmission shaft and a gear disc integrally formed on the transmission shaft, a meshing tooth part is arranged on the peripheral wall of the gear disc, a mounting groove is formed in the end of the transmission shaft, a central deep groove is formed in the groove wall of the mounting groove, an oil storage tank is inserted into the central deep groove and filled with grease, and a plurality of oil outlet holes are formed in the peripheral wall of the inner end of the oil storage tank. An oil outlet channel communicated with the corresponding oil outlet hole is formed in the outer end face of each meshing tooth part in the direction of the transmission shaft. The utility model has the advantage of reducing gear wear.

The utility model discloses a gear maintenance machine for a tank. The gear maintenance machine comprises a rack; the punch mechanism is arranged on the rack in a supporting manner, and the punch mechanism can do reciprocating motion in the longitudinal direction; the gear is rotatably arranged on one side of the punch mechanism in a supported mode, and a plurality of grease injection holes are formed in the gear in the circumferential direction; the supporting frame is arranged on one side of the gear and the punch mechanism; one end of the grease injection box is fixedly arranged at the upper part of the support frame; one end of the grease injection channel is communicated with the bottom of the grease injection box; a grease injection pipe; one end of the first connecting rod is telescopically arranged at the lower part of the support frame, and the other end of the first connecting rod is propped against the edge of the gear; one end of the second connecting rod is hinged to the first connecting rod through a connecting rod, and the other end of the second connecting rod is connected with the grease injection pipe. And when the punch is used for cleaning the gear hole, the gear is subjected to grease injection through the grease injection mechanism and the two-connecting-rod stable limiting, so that the lubricating efficiency is improved, and the wear resistance of the gear is enhanced.

The invention discloses a gear wear estimation prompting method and system for a double-electric-drive-axle vehicle, and the method comprises the steps: obtaining the operation parameters of electric drive axles of the vehicle, including the single-axle operation time, single-axle operation mileage, torque output data distribution, torque positive and negative switching times and axle temperature data distribution of each electric drive axle; respectively processing the operation parameters to obtain wear factors of the corresponding operation parameters of the electric drive bridges; the obtained wear factors are multiplied by respective weight coefficients and then summed, and wear evaluation indexes of all the electric drive bridges are obtained; and comparing the wear evaluation index of each electric drive axle with a preset wear limit threshold, and generating early warning information and / or adjusting a drive control strategy according to a comparison result. According to the method, the wear degree is pre-judged through the wear evaluation index, so that early warning and prompting are given, and the passive mode of post-maintenance is changed; and the driving strategy is automatically adjusted by comparing the abrasion difference of the double axles, and the overall service life of the double electric drive axles is effectively prolonged.

The invention relates to the technical field of optical fiber rotary connectors, in particular to a micro multi-core optical fiber rotary connector rotary mechanism and an optical fiber rotary connector, and solves the problem of abnormal gear wear caused by axial movement of a transmission gear in the prior art. The rotating mechanism comprises a rotating body and a rotating body, the rotating body and the rotating body are in transmission connection through a transmission part, the transmission part comprises an annular positioning seat, two bearing seats are arranged on the inner side of the positioning seat, a compression spring is arranged between the two bearing seats, and transmission gears meshed with the rotating body and the rotating body are rotationally connected to the bearing seats. The positioning seat is in threaded connection with a positioning pin, and the end of the positioning pin extends into the inner side of the positioning seat to be matched with the bearing seat in an inserted mode. The transmission gear has the advantages that the inserting portion of the positioning pin is matched with the radial positioning hole of the bearing seat in an inserting mode, reliable locking of the axial position of the bearing seat is achieved, the defect that the transmission gear is prone to axial movement is fundamentally overcome, and the problem of abnormal abrasion caused by rigid abutting of the end face of the gear is avoided.

This utility model provides a car tailgate rotating motor, including a drive motor body. One end of the drive motor body has a circumferential array of mounting screw holes. A reduction gear assembly is mounted on one end of the drive motor body, and a rear end cover assembly is mounted on the other end. The reduction gear assembly includes a reduction gearbox, which is mounted on one end of the drive motor body. A cavity partition is fixedly connected to the inner wall of the reduction gearbox. The inner cavity of the reduction gearbox is divided into a transmission cavity and an oil storage cavity by the cavity partition. An input shaft sleeve is fixedly connected to the center of the oil storage cavity. Lubrication tubes are arranged circumferentially inside the oil storage cavity, and an oil-collecting cotton core is fixedly connected inside each lubrication tube. Oil replenishment holes are opened on the circumferential surface of the lubrication tubes. The mutual cooperation of the drive motor body, mounting screw holes, reduction gear assembly, rear end cover assembly, and electronic control cover assembly ensures that the device avoids the situation where gears cannot be lubricated, leading to severe gear wear and reduced transmission efficiency during use.

The utility model discloses a kind of inner cooling hole and spiral groove composite cutting tap, including bracing plate, sliding slot, butt joint rod, cutting tap and linkage mechanism, sliding slot is set on bracing plate, butt joint rod is slidably connected at bracing plate top, cutting tap is connected at butt joint rod one end, linkage mechanism is set on bracing plate.The beneficial effects of the utility model are:in the utility model, by setting linkage mechanism, and then by the meshing linkage of driving gear in linkage mechanism driving driven gear, and then by first adjusting rod and second adjusting rod respectively driving driving push-pull rod and driven push-pull rod linkage, and drive first pulley, second pulley reciprocating motion as a whole, and by sprocket and chain enable cutting tap to be driven fast reciprocating motion, by chain drive to replace cylinder / motor direct drive, avoid leakage problem caused by cylinder sealing element abrasion, simultaneously eliminate motor frequent forward and reverse rotation caused by winding overheating and gear abrasion, prolong the life of equipment.

The invention relates to a six-gear helical-tooth gearbox for a light truck. The six-gear helical-tooth gearbox is used for solving the problems that in the prior art, a gearbox is insufficient in bearing capacity, gear abrasion is fast, and noise is large. The invention provides a six-gear helical tooth gearbox for a light truck. The six-gear helical tooth gearbox comprises a shell assembly, an input shaft assembly, an output shaft assembly, two intermediate shaft assemblies and a synchronizer assembly. The input shaft assembly comprises an input shaft and an input gear arranged on the input shaft. The intermediate shaft assembly comprises an intermediate shaft, an input end intermediate gear and six gear-shifting intermediate gears, wherein the input end intermediate gear and the six gear-shifting intermediate gears are arranged on the intermediate shaft. The output shaft assembly comprises an output shaft and six output gears arranged on the output shaft. The output gear is arranged on the output shaft in a floating mode; and the two corresponding intermediate gears in the two intermediate shaft assemblies are respectively meshed with the corresponding output gears and support the floating output gears.