46 results about "Cycloid gear" patented technology

The invention discloses a low-noise transmission mechanism capable of coaxially outputting large torque, which is characterized in that a motor is fixed on a casing through a screw, a knurling position on a motor shaft is tightly pressed and matched with an eccentric shaft sleeve and is in transmission with the motor shaft, the eccentric shaft sleeve is arranged in a power output disc, and a fixed inner gear is sleeved into the power output disc to be meshed with two cycloidal gears; the tooth surface of the convex tooth root of the power output disc meets the tooth surface of the concave tooth root of the fixed inner gear, the linear teeth can provide smooth tooth surface pairing all the time, the tooth root tooth surface of one gear cannot make contact with the tooth root tooth surface of the other gear, the cross sliding block is installed in the power output disc, the output shaft is installed on the cross sliding block, and the output shaft is sleeved with the front cover plate and fixed through a screw. The transmission efficiency is high, rolling friction is achieved, the structure is simple, the input shaft and the output shaft are located on the same axis, the size is small, and contact stress is small; transmission parts are good in abrasion resistance, low in noise, high in bearing capacity, small in part heating, long in service life, small in tooth surface abrasion and convenient to install, and multi-tooth meshing is achieved.

The application relates to a hollow type speed reducer which comprises a pin gear shell and a first stage speed reduction component and a second stage speed reduction component, the first stage speed reduction component comprises a driving wheel, a double gear and a planetary gear, the second stage speed reduction component comprises a plurality of eccentric shafts, two cycloid gears, a plurality of pin pins and an output shaft cover, the output shaft cover is rotationally arranged in the pin gear shell, and the planetary gear is connected to one end of the eccentric shaft; a cooling cavity is arranged in the eccentric shaft, the output shaft cover comprises an upper cover and a lower cover, the upper cover is arranged close to the planetary gear, annular liquid storage cavities are arranged on the sides adjacent to the upper cover and the lower cover, the two ends of the eccentric shaft are respectively and sealingly rotationally connected to the upper cover and the lower cover, and the two ends of the cooling cavity are respectively communicated with the two liquid storage cavities. According to the application, the cooling cavity is arranged in the eccentric shaft, circulation and flow of the cooling liquid between the cooling cavity and the liquid storage cavities can be formed when the speed reducer rotates forward and reversely, the annular liquid storage cavities facilitate heat dissipation of the cooling liquid, and the heat dissipation and temperature control effects of the eccentric shaft and the cylindrical cam thereon can be greatly improved.

The invention discloses a three-piece type cycloidal pin gear speed reducer. Comprising a shell assembly composed of a pin wheel shell and end covers at the two ends, an input transmission assembly comprising a high-speed input shaft and a hollow shaft sleeved with three 120-degree eccentric phase eccentric sleeves, a cycloidal gear assembly comprising three cycloidal gears which are in one-to-one correspondence with the eccentric sleeves and are evenly distributed at 120 degrees, and a meshing transmission assembly comprising a pin gear pin and a gear pin sleeve. The output transmission assembly comprises a pin disc and a low-speed output shaft, the cycloidal gear is in rolling fit with the eccentric sleeve, and the pin disc is linked through a shaft pin to achieve power output; according to the design, through the 120-degree uniform distribution structure of the three eccentric sleeves and the three cycloidal gears, load trisection transmission and dynamic balance of a transmission system are achieved, and the bearing capacity and the transmission stability are remarkably improved.

The brushless external fuel pump comprises a pump head assembly, a motor assembly, a connecting disc assembly and a control assembly, the pump head assembly is arranged at the upper end of the motor assembly, the control assembly is arranged at the lower end of the motor assembly, and the connecting disc assembly is arranged between the pump head assembly and the motor assembly. The motor assembly comprises a motor shell, a motor stator assembly, an oil separation sleeve assembly and a motor rotor assembly which are sequentially arranged from outside to inside. The pump head assembly comprises a pump head installed on the motor shell, an oil inlet channel with one end communicating with the outside of the left side of the pump head and an oil outlet channel with one end communicating with the outside of the right side of the pump head are arranged in the pump head, and a cycloid gear assembly is arranged at the lower end of the pump head. The other end of the fuel inlet channel is communicated with the other end of the fuel outlet channel through the cycloid gear assembly, the requirements for high fuel pressure and large flow of a large heavy truck can be met, and the service life of the fuel pump is guaranteed.

The application discloses a kind of cycloid motor, including brake device, oil distribution assembly, shell and rear side plate, brake device is equipped with brake shaft in, brake shaft is extended outside brake device, brake shaft is connected with oil distribution assembly by transmission shaft, transmission shaft middle section is connected with cycloidal pin gear assembly, cycloidal pin gear assembly includes stator body and cycloid gear, transmission shaft is engaged with cycloid gear;Oil distribution assembly includes oil distribution disc and oil distribution ring, oil distribution disc has several oil distribution holes, transmission shaft is embedded in oil distribution ring by passing through oil distribution disc;Shell is fixedly connected with rear side plate, sealing ring is equipped on oil distribution ring, inside sealing ring is A cavity, B cavity between oil distribution ring and rear side plate, A oil port and B oil port are opened on shell, A cavity is connected with A oil port, B cavity is connected with B oil port;Shell is equipped with auxiliary block and second spring, second spring is opposite with auxiliary block, auxiliary block is sealed with oil distribution ring, auxiliary block can prevent high-pressure oil into brake device.

The invention relates to a gearbox (16), in particular for use in electronic gripping or clamping directions, a drive unit (10) and electronic gripping or clamping devices (120), wherein the gearbox comprises a drive shaft (24), an eccentric (28), a first internal gear (30), a first external gear (38), a second internal gear (32), a second external gear (40), a first output element (46), a second output element (48) and an output shaft (58).

The invention relates to the technical field of gear machining, and discloses a gear turning method of a cycloid-like internal meshing gear, which comprises the following steps of: establishing a tooth profile mathematical model based on an arc meshing line, determining a tooth crest and tooth root conjugate tooth profile equation of an external gear and an internal gear, and establishing a four-coordinate system and a spatial motion relation; an innovative variable-domain directional search coupling dichotomy algorithm is adopted, a blade curve is accurately solved on the axial section of Z = 0, and the problem of unstable calculation caused by tooth surface singular points is solved; a parameterized tool is designed, linkage cutting of the tool and a workpiece and control of cutting parameters are achieved by means of a five-axis numerical control machine tool, the precise machining effect is finally obtained, the gear bearing capacity is improved, the transmission stability is improved, the single-piece machining time is only 30 minutes, and the technical bottlenecks that a traditional method is low in machining efficiency and prone to over-cutting and under-cutting are broken through. The method is suitable for the precision transmission field of aerospace, new energy automobiles and the like, and the high-precision industrial manufacturing problem of the cycloid-like gear is practically solved.

The application discloses a high-volume-efficiency combined gear pump and relates to the technical field of gear pumps.The combined gear pump comprises a gear pump shell, a gear pump end cover is connected to the upper end opening of the gear pump shell, a driving cycloid gear shaft is rotationally connected in the gear pump shell, a cycloid gear is arranged on the outer wall of the driving cycloid gear shaft, a driving gear is arranged on the outer side of the cycloid gear, the outer ring teeth of the driving gear are meshed with the outer ring teeth of a driven gear, upper side floating shaft sleeves are arranged at the upper ends of the driving gear and the driven gear, upper side oil pressing holes are arranged on the upper side floating shaft sleeves, lower side floating shaft sleeves are arranged at the lower ends of the driving gear and the driven gear, lower side oil pressing holes are arranged on the lower side floating shaft sleeves, an oil inlet and an oil outlet are arranged on the outer wall of the gear pump shell, a pre-pressing oil channel and a constant-pressure oil channel are arranged on the gear pump end cover, an overflow valve can be arranged between the pre-pressing oil channel and the constant-pressure oil channel, and the meshing and merging positions of the driving gear and the driven gear are communicated with the oil outlet.The combined gear pump has high volume efficiency and small pressure pulse.

The utility model discloses a kind of fishing reel deceleration rotation tooth, including main shell, the main shell is equipped with deceleration component, the deceleration component includes rotating gear, the rotating gear is equipped with eccentric round hole, eccentric round hole is equipped with cycloidal gear, the front side of cycloidal gear is fixedly connected with multiple cylindrical blocks, the inner of rotating gear is equipped with cover plate, the cover plate is equipped with multiple through holes, each cylindrical block is passed through corresponding through hole, the left side inner wall of main shell is equipped with needle roller fixed seat, needle roller fixed seat is located in rotating gear, the right side of needle roller fixed seat is equipped with cycloidal groove, the left side of cycloidal gear is fixedly connected with cycloidal gear. The utility model is equipped with deceleration component, when rocker arm rotates take-up, main shaft will be moved up and down at slower speed, so that fishing line can be more regular and wrap on reel, transmission is more stable, better adaptation to demand of fly fishing method to fast response, accurate control.

The utility model relates to a kind of cycloidal gear grinding clamps, including jig platform plate, jig installation base, axial positioning structure, radial positioning structure, the jig installation base is fixed in the bottom surface of jig platform plate, the axial positioning structure is set in the top surface center of jig platform plate, the jig platform plate, jig installation base, axial positioning structure such as axial center are set, the radial positioning structure is provided with four groups, four groups radial positioning structure such as circumferential angle setting is in the side of jig platform plate.The utility model optimizes the setting of cycloidal gear grinding clamp, structure has higher precision, can satisfy the requirement of fine processing, and structure uses general design, is suitable for a variety of specifications cycloidal gear processing, in addition structure uses replaceable contact component, reduce maintenance cost, suitable for promotion and use.

The utility model discloses a kind of forced lubrication circulation systems of spiral filter centrifuge, including bearing seat and differential mechanism installed on bearing seat;Its characterized in that the bearing seat is connected with oil tank;Oil tank is sequentially connected with cycloidal gear pump motor set, the filter that has filtration to lubrication and the cooler that has cooling to lubrication;The oil inlet pipe that is convenient for the lubricating oil to be transported to differential mechanism inside is connected between the cooler with differential mechanism;Rotary joint is installed between the differential mechanism and oil inlet pipe.The utility model extracts lubricating oil in oil tank by cycloidal gear pump motor set, lubricating oil is sequentially filtered impurity by filter, cooler is cooled to lubricating oil, lubricating oil after cooling enters differential mechanism inside and is lubricated, lubricated lubricating oil is sprayed to bearing under the action of differential mechanism rotation, lubricating oil after bearing lubrication is returned to oil tank, to realize the circulation use of lubricating oil, to improve lubrication and heat dissipation effect.

The invention provides a pin wheel housing, planet carrier and bearing integrated cycloidal reducer joint module which comprises an input shaft, a cycloidal reducer assembly, a motor, an encoder and a driver, the cycloidal reducer assembly comprises a pin wheel housing, a cycloidal gear and a planet carrier, the cycloidal gear and the planet carrier are arranged in the pin wheel housing, and a rolling body is arranged between the pin wheel housing and the planet carrier. One end of the planet carrier is fixedly connected with a flange cover plate capable of supporting a pin shaft of the planet carrier, the flange cover plate and the pin shaft are fixed in an adhesive mode, screws are reduced, a roller path on an outer ring of a bearing and a pin wheel housing are arranged to be an integrated component, rolling constraint can be provided for a rolling body, meanwhile, axial limiting structures such as a check ring and a gasket are reduced, and the service life of the rolling body is prolonged. The axial size of the speed reducer is reduced, the whole parts are fewer, the weight is lighter, and the rigidity is higher.

The invention discloses a cycloidal gear tooth profile optimization method and a small RV speed reducer. The invention discloses a small RV speed reducer, which relates to the technical field of speed reducers, and comprises an input shaft, a planetary gear assembly, a cycloid speed reduction assembly and an output assembly, the output end part of the input shaft is sleeved with a transmission sun gear, the input shaft and the transmission sun gear are concentrically arranged, and the cycloid speed reduction assembly is fixedly connected with the output assembly. After the input shaft penetrates through the cycloid speed reduction assembly, the transmission sun gear is meshed with the crank planetary gear set to form transmission, so that the cycloid speed reduction assembly synchronously generates planetary rotation, and speed reduction output is conducted through the cycloid speed reduction assembly by means of the output assembly. According to the cycloidal gear, the assembly structure is simple, the axial length needed by a traditional cycloidal gear is reduced, the size is greatly reduced, meanwhile, the minimum curvature radius is 0.5 mm after optimization treatment is conducted on the obtained tooth profile curve through the cycloidal gear tooth profile optimization method, the machining production pain point encountered in the speed reducer production and manufacturing industry is successfully solved, and the production efficiency is improved. Batch production is facilitated, the cost is greatly reduced, and the service life of the product is prolonged.

The invention relates to an actuating device (1) for actuating a disconnect coupling (33) of a drive (30), with which a drive machine (31) can be disconnected and coupled from and / or to an output (32), comprising: - a transmission device (2) for connecting a drive device (3) of the actuating device (1) with an output device (4) of the actuating device (1), - wherein the transmission device (2) comprises a wave gear and / or a cycloidal gear. Furthermore, the invention relates to a drive (30) for a hybrid or electric vehicle with an actuating device (1).

The present disclosure relates to electromagnetically-controlled magnetic cycloidal gear assemblies configured to achieve enhanced torque capacity, and methods of operating same. In one example embodiment, a method includes sensing a position of a cycloid relative to a stator, where the stator includes a plurality of electromagnets, and the cycloid includes a plurality of permanent magnets. Also, the method includes determining respective torque characteristics concerning the respective electromagnets based upon the sensed position, where the respective torque characteristic that is determined concerning each respective one of the electromagnets is indicative of a respective relative position of the respective electromagnet in relation to a respective closest one of the permanent magnets. The method additionally includes outputting from a controller, for receipt respectively at least indirectly by the respective electromagnets or respective control devices coupled thereto, a plurality of output signals respectively based at least in part upon the respective torque characteristics.

The embodiment of the application provides an RV reducer, by setting an oil injection hole in a planet carrier, setting a through oil hole penetrating through a vertical direction of a rolling pin and setting a centrifugal hole communicating with the through oil hole in a horizontal direction of the rolling pin, so that a lubricating channel is formed, lubricating oil can slide out from the oil injection hole, then fall into the through oil hole and finally flow to the outside of the rolling pin from the centrifugal hole under the centrifugal action, so that the meshing position of the rolling pin and the cycloid gear is lubricated. The lubricating structure is simple in design and easy to realize, and the lubricating oil flows to the outside of the rolling pin through the centrifugal hole under the centrifugal force to lubricate the tooth profile of the cycloid gear, so that the problem of insufficient lubrication at the small area meshing position between the rolling pin and the cycloid gear is solved, and the transmission precision of the RV reducer is maintained.

This invention discloses a grinding wheel dressing method for machining cycloidal gears using a worm gear grinding machine. The key feature is the use of a worm gear grinding machine that integrates cycloidal gear machining and grinding wheel dressing functions to achieve rapid and precise grinding wheel dressing. The worm gear grinding machine, with an adjustable central axis swivel angle for the dresser, increases the dresser's freedom of movement during dressing, reducing the impact of changes in the grinding wheel tooth profile, controlling errors during dressing, and improving machine tool stability. A contact vibration sensor is installed on the grinding wheel; by sensing vibration data, the machine tool automatically adjusts the dresser's alignment, simplifying manual operation, improving dressing accuracy, and saving time. After the initial alignment, the dresser does not need to be aligned again, improving dressing efficiency. By differentiating the two-stage machining process of dressing the grinding wheel, the roughing stage quickly removes excess material from the grinding wheel while the finishing stage maintains a good surface morphology.

The utility model belongs to the technical field of speed reducers, and particularly relates to a novel speed reducer with small tooth difference. Comprising a speed reducer shell and a speed reducer end cover, a fixed gear is fixedly arranged in the speed reducer shell or the speed reducer end cover, transmission assemblies matched with one another are arranged in the speed reducer shell, and each transmission assembly comprises an eccentric input shaft, a first cycloid gear, a second cycloid gear and an output gear; when the eccentric input shaft rotates, the first cycloid gear can be driven to do cycloid rotation along the fixed gear, the second cycloid gear follows the fixed gear to do cycloid rotation, and due to the fact that the tooth number difference between the fixed gear and the first cycloid gear is the same as the tooth number difference between the first cycloid gear and the output gear, the tooth number of the first cycloid gear is the same as the tooth number of the second cycloid gear; therefore, the second cycloid gear can drive the output gear to rotate back. The reduction ratio of the small-tooth-difference speed reducer is obtained by subtracting the tooth number of the output tooth difference from the tooth number of the fixed gear and then dividing by the tooth number of the first cycloid gear or the second cycloid gear.

The epicyclic gear reducer can include an intermediate planet carrier connected between the drive ring gear and the driven wheel using a first sliding joint located on a first side of the intermediate planet carrier and a second sliding joint located on a second side of the intermediate planet carrier. The epicyclic gear reducer can also include an input shaft rotationally connected to the drive ring gear, and the drive ring gear is configured to transmit rotational motion of the input shaft to the intermediate planet carrier. The epicyclic gear reducer can also include an output sun gear connected to the intermediate planet carrier. The output sun gear can be further rotationally connected to a central output shaft.

This invention discloses a method for measuring the single-item deviation of cycloidal gears using a coordinate measuring machine (CMM), belonging to the field of precision testing technology and instruments. The method first generates theoretical feature points based on the parametric equations of the cycloidal gear, establishes the workpiece coordinate system of the cycloidal gear through a "coarse-fine" iterative strategy, and plans an interference-free measurement path to obtain discrete points on the actual tooth surface. Then, a non-uniform rational B-spline fitting algorithm is used to reconstruct the actual tooth profile curve, calculate the normal deviation of the actual tooth profile relative to the theoretical tooth profile, and perform Gaussian low-pass filtering on the original deviation data. According to national or industry standards, the pitch deviation, tooth profile deviation, and helix deviation of the cycloidal gear are evaluated respectively. This invention achieves high-precision fixed-type measurement and deviation evaluation of cycloidal gears on a general-purpose CMM, with advantages such as high measurement accuracy, good repeatability, and strong applicability.

The application discloses a cycloid speed reducer, the middle part of an outer shell is penetrated by an input shaft, rotation of the input shaft is realized, and a cycloid speed reduction set is synchronously rotated, the cycloid speed reduction set comprises at least one cycloid disc and a non-circular type column pin arranged on an inner shell, an outer edge cycloid tooth on the cycloid disc and a bevel gear tooth on the inner wall of the outer shell form a cycloid gear set, a waist-shaped hole is arranged through the cycloid disc, and the non-circular type column pin is matched into the hole where the waist-shaped hole is located, so that the cycloid disc drives the non-circular type column pin on the waist-shaped hole to synchronously rotate in planetary transmission; the two ends of the non-circular type column pin are provided with semicircular arc surface structures, and the arc surface structures are matched with the inner wall where the waist-shaped hole is located in transmission. The whole device increases the bearing capacity of the non-circular type column pin, improves the operation stability of the cycloid gear set, can also disperse loads, reduces contact stress, and prolongs the service life.

The invention provides a speed reducer, and belongs to the technical field of speed reducers for precision control of industrial robot joints and the like, and the speed reducer comprises an eccentric shaft which enables an eccentric part to perform eccentric motion through rotation of a shaft; the cycloid gear is supported on the eccentric part through rotation and performs eccentric motion synchronously with the eccentric motion of the eccentric shaft; a pin wheel housing having a plurality of outer peripheral pin wheels that function as internal teeth of the cycloidal gear and that can rotate freely; the planet carrier is used for rotatably supporting and clamping the cycloid gear through an eccentric shaft, and the planet carrier is used for outputting the cycloid gear to rotate; in the speed reducer, a cycloidal gear and a planet carrier are manufactured after the thickness corresponding to the increase amount of the torsional rigidity of each component is reduced through shot peening during material processing, and shot peening is performed on the surface of each component.

The invention provides a cycloidal gear crowned shape modification method for eliminating a speed reducer gap and jittering, which comprises the following steps of: S1, determining a target shape modification working surface of a cycloidal gear to be modified between a tooth root working starting point and a tooth crest working ending point; s2, standard tooth profile data and preset drum shape modification amount data of the target shape modification working face are obtained; s3, a combined drum shape modification function is constructed, wherein the combined drum shape modification function is used for describing a continuous and non-constant drum shape quantity change rule at different positions in the tooth height direction of the working face; and S4, according to the combined drum shape modification function, a numerical control machining instruction is generated so as to machine the target shape modification working face, and a shape modification tooth face with the combined drum shape characteristic is formed. Compared with the prior art, the combined drum shape modification method is adopted, so that the technical problems of large backlash, large rotation error, low transmission precision and poor whole machine rigidity caused by partial backlash easily generated in a traditional shape modification mode are solved.

The invention provides a cycloidal-pin wheel speed reducer. The cycloidal-pin wheel speed reducer comprises an input mechanism, an eccentric mechanism, a first bearing assembly, a cycloidal wheel mechanism, an output mechanism and a rack. The input mechanism comprises an input shaft and a cylindrical pin; the eccentric mechanism is arranged on the input shaft in a sleeving mode through a cylindrical pin, and the cycloidal gear mechanism is arranged on the eccentric mechanism in a sleeving mode through a first bearing assembly. The rack is provided with a plurality of outer roller pins which are distributed in a circumferential array; the output mechanism is provided with a plurality of inner roller pins which are distributed in a circumferential array; the outer edge tooth profile of the cycloidal gear mechanism is meshed with the outer roller pin, and the inner roller pin correspondingly penetrates through an output hole of the cycloidal gear mechanism; when the input shaft rotates, the input shaft drives the cycloidal gear mechanism to do eccentric motion through the eccentric mechanism, and the cycloidal gear mechanism drives the output mechanism to rotate through the inner roller pin. The input shaft and the eccentric mechanism are connected through the cylindrical pins, a relatively closed oil leakage prevention structure can be reserved, and the fatigue strength requirement can also be met.

The invention relates to the technical field of cycloidal-pin wheels, in particular to a cycloidal-pin wheel meshing clearance fine-adjustment locking device which comprises a shell, a sealing plate and a machine base bearing the shell and further comprises a pin wheel shell, the pin wheel shell is installed in the shell, and pin teeth are installed on the inner side of the pin wheel shell; a cycloidal gear; the device has the beneficial effects that the clamping plate is clamped in the clamping groove, the eccentric bearing can be locked on the high-speed shaft, the eccentric bearing is prevented from rotating relative to the high-speed shaft, the driving disc is arranged on the high-speed shaft, the driving disc is in driving connection with the clamping groove and the clamping plate, and when the clamping plate is pressed, the eccentric bearing is prevented from rotating relative to the high-speed shaft. The eccentric bearing can be driven through the driving disc, so that the eccentric bearing rotates relative to the high-speed shaft, the phase position of the eccentric bearing is adjusted, the eccentric bearing can be adjusted under the condition that the device does not need to be disassembled, the adjusted eccentric bearing can be locked, and convenience and rapidness are achieved.

The utility model discloses a large hollow shaft cycloid joint module, which comprises a shell, a hollow shaft and a cycloid joint, the eccentric crankshaft is arranged in the mounting space of the shell in a penetrating manner and is provided with an eccentric structure; the output end cover is arranged on the outer side of the eccentric crankshaft in a sleeving mode, and a first needle bearing is arranged between the eccentric crankshaft and the output end cover. The first cycloid gear assembly comprises a first cycloid gear and a first inner gear, the first cycloid gear is arranged on the outer side of the eccentric crankshaft in a sleeving mode through a second needle bearing, and the first inner gear is formed on the inner side face of the output end cover; the second cycloid gear assembly comprises a second cycloid gear and a second inner gear, the second cycloid gear is fixedly arranged at the bottom of the outer side of the first cycloid gear in a sleeving mode, and the second inner gear is formed on the inner wall of the shell; the eccentric balance weight wheel is fixedly arranged on the outer side of the eccentric crankshaft in a sleeving mode. The hollow shaft is fixedly arranged in the eccentric crankshaft in a penetrating mode, and a cable channel is formed in the hollow shaft. Through layout optimization of the cycloid gear and the bearing, the problems of poor rigidity and low precision in the prior art are solved.

The invention provides an aviation plunger pump temperature regulation and control method based on a cycloid gear. The aviation plunger pump temperature regulation and control method is used for solving the temperature rise problem caused by insufficient heat dissipation. According to the method, a cycloid gear is integrated in the pump to increase the oil return flow, and high-temperature oil in a shell containing cavity is taken away to reduce the overall temperature of the aviation plunger pump. The method comprises the following steps: dividing a pump into a plurality of nodes, and establishing a temperature analysis model and a thermal network equation of the nodes of a control body; establishing a pump energy loss model, analyzing the temperature of each node of the aviation plunger pump under different oil return flows in combination with a heat balance equation, and further determining the design flow of the cycloid gear; establishing a structural equation of the cycloidal gear, and analyzing the influence rule of the structural parameters of the cycloidal gear on the performance of the cycloidal gear by using a theoretical formula and simulation; and the cycloid gear structure parameters are determined by combining the size limitation of the pump. According to the method, the oil return temperature of the plunger pump under different working conditions is determined through the plunger pump heat network model established through the lumped parameter method, and oil return temperature control over the aviation plunger pump is achieved through the cycloid gear.

The utility model discloses a speed reducer structure applied to an internal transmission system of a monitoring camera, which comprises a shell and a rotor, and a fixed block is arranged in the shell. According to the utility model, the rotor is driven to rotate, so that the pin gear connected with the rotor swings, the pin gear drives the cycloidal gear to roll in the swinging process, the cycloidal gear drives the output shaft to rotate in the rolling process, and the gear assembled on the output shaft is connected with the gear below the camera through the synchronous belt. The output shaft rotates to drive the camera to rotate, and compared with a traditional speed reducer structure, a double-bearing and double-fulcrum structure is adopted, so that the transmission process is more stable; the phenomenon that the camera falls down easily due to the fact that a gap of a multi-stage transmission gear of a parallel shaft speed reducer is large and a single-fulcrum bearing operates unstably during downward rotation is avoided, the gap is reduced, meanwhile, the torque during rotation is increased, and it is guaranteed that the camera does not fall down when rotating downwards again.

The invention provides a cycloid-like planetary transmission gear full tooth surface modification method, and relates to the technical field of gear design and manufacturing. The method comprises the steps that a contact analysis model of the internal gearing type cycloid external gear and the internal gear is established, the external gear is a driving gear, and the scheme that the external gear is subjected to shape modification and the internal gear is not subjected to shape modification is considered on the basis of multiple aspects; determining an optimization method of the modification amount and the modification parameters of the tooth profile and the tooth direction modification, and adopting a finite element method to realize full tooth surface modification parameter optimization by adjusting the modification amount and the modification length for multiple times; a process of optimizing tooth surface modification parameters is given in a block diagram form, and on the premise that a transmission structure, working condition loads and error assembly are considered, comprehensive optimization is achieved through step-by-step adjustment through finite element simulation; and the contact ratio, the tooth surface load, the tooth surface stress distribution, the meshing rigidity and the transmission error of the cycloid-like gear before and after modification are compared, which shows that the modified tooth surface has remarkable advantages in the aspects of improving the gear strength and the transmission stability.

This invention proposes a temperature control method for aviation plunger pumps based on cycloidal gears to address the temperature rise problem caused by insufficient heat dissipation. This method integrates cycloidal gears within the pump to increase the return oil flow rate, carrying away the high-temperature oil in the housing cavity and reducing the overall temperature of the aviation plunger pump. The invention divides the pump into multiple nodes and establishes temperature analysis models and thermal network equations for the control volume nodes; it establishes a pump energy loss model and analyzes the temperature of each node of the aviation plunger pump under different return oil flow rates using thermal balance equations, thereby determining the design flow rate of the cycloidal gear; it establishes the structural equations of the cycloidal gear and uses theoretical formulas and simulation analysis to analyze the influence of the cycloidal gear structural parameters on its performance; and it determines the cycloidal gear structural parameters based on the pump's size constraints. This invention uses the plunger pump thermal network model established by the lumped parameter method to determine the return oil temperature of the plunger pump under different operating conditions and achieves return oil temperature control of the aviation plunger pump through cycloidal gears.