49 results about "Non-circular gear" patented technology

The invention relates to the technical field of gear machining, and particularly discloses a gear machining turning machine tool which comprises a base, a clamp box and an adjusting box which can be adjusted in a sliding mode are installed on the top face of the base through sliding rails, and a clamping assembly used for clamping steel billets is arranged in the clamp box. By integrating the high-precision sliding rail and the synchronous adjusting mechanism, the machine tool can rapidly and cooperatively calibrate the eccentric distance and the non-circular phase of the main shaft, the time needed by traditional manual adjustment is remarkably shortened, excellent positioning precision is achieved, vibration and drifting in the machining process are effectively restrained through the dynamic locking device, and the machining precision is improved. Coaxiality errors of non-circular gear hole site machining are greatly reduced, accidental errors caused by manual adjustment are eliminated as much as possible, and a phase reference with the consistent height is provided for follow-up tooth profile machining.

A bidirectional compensation type tobacco seedling transplanting mechanism comprises a vehicle body which is provided with a power assembly, a planting device and a well cellar hole forming drill bit. The power assembly comprises a main power shaft, a first non-circular gear, a second non-circular gear and a gearbox shell, and the first non-circular gear and the second non-circular gear are both arranged in the gearbox shell. The first non-circular gear is fixedly arranged relative to the vehicle body; the main power shaft drives the gearbox shell to rotate relative to the vehicle body; the second non-circular gear is meshed with the first non-circular gear; the second non-circular gear is connected with a crank; the crank is connected with a first / second connecting rod, the tail ends of the first connecting rod and the second connecting rod are arranged on the framework in a sliding manner, and the well cellar cavitation drill bit and the planting device are connected to the tail ends of the first connecting rod and the second connecting rod respectively. According to the bidirectional compensation type tobacco seedling transplanting mechanism, the hole forming quality and the seedling falling success rate are improved, the well cellar depth and the hole opening size conform to the agricultural requirements of tobacco seedling growth, the heat preservation effect of tobacco seedlings in the early growth stage can be guaranteed, and the survival rate of the tobacco seedlings is improved.

The invention discloses a high-smoothness self-adaptive closed-chain multi-foot walking platform. The high-smoothness self-adaptive closed-chain multi-foot walking platform is composed of a, b, c and d four-foot units (A, B, C and D) and a connecting frame (E), wherein the four-foot units (A, B, C and D) are completely identical. Each four-foot unit is driven by a single motor to walk, the platform compensates displacement fluctuation in the vertical direction and speed fluctuation in the walking direction when the platform moves through the transmission design of non-circular gears in gear boxes in the four-foot units, and high smoothness and high stability of walking of the platform are achieved. A cam system is designed, a leg mechanism self-adaptive reconstruction module is built, and the platform is endowed with passive obstacle crossing ability. The high-smoothness self-adaptive closed-chain multi-legged walking platform can realize detection and exploration tasks on complex road surfaces such as mountainous regions, and is richer in walking gaits and higher in terrain adaptability.

A bidirectional compensation type tobacco seedling transplanting mechanism comprises a vehicle body which is provided with a power assembly, a planting device and a well cellar hole forming drill bit. The power assembly comprises a main power shaft, a first non-circular gear, a second non-circular gear and a gearbox shell, and the first non-circular gear and the second non-circular gear are both arranged in the gearbox shell. The first non-circular gear is fixedly arranged relative to the vehicle body; the main power shaft drives the gearbox shell to rotate relative to the vehicle body; the second non-circular gear is meshed with the first non-circular gear; the second non-circular gear is connected with a crank; the crank is connected with a first / second connecting rod, the tail ends of the first connecting rod and the second connecting rod are arranged on the framework in a sliding manner, and the well cellar cavitation drill bit and the planting device are connected to the tail ends of the first connecting rod and the second connecting rod respectively. According to the bidirectional compensation type tobacco seedling transplanting mechanism, the hole forming quality and the seedling falling success rate are improved, the well cellar depth and the hole opening size conform to the agricultural requirements of tobacco seedling growth, the heat preservation effect of tobacco seedlings in the early growth stage can be guaranteed, and the survival rate of the tobacco seedlings is improved.

The invention relates to a leaf vegetable constant-force clamping and conveying mechanism based on a non-circular gear system and a transmission ratio algorithm. The clamping and conveying mechanism comprises a rack and a plurality of constant-force clamping modules installed on the rack. The constant-force clamping module comprises a non-circular gear system, the non-circular gear system comprises a front-end non-circular gear rotationally connected with the mounting shell and a rear-end non-circular gear, and the front-end non-circular gear is in transmission connection with the rear-end non-circular gear through a plurality of middle non-circular gears; a floating connecting rod is fixedly connected to the first rotating shaft, a floating clamping wheel is installed on the floating connecting rod, and the wheel face of the floating clamping wheel abuts against the inner side face of the clamping conveying belt. The constant-force clamping module serves as a core component of the whole clamping and conveying mechanism, and constant-force clamping of leaf vegetables is achieved through the design of a non-circular gear train. The driving module is used for driving the clamping belt to rotate. Clamping damage in the mechanical harvesting process of the leafy vegetables can be avoided, flexible clamping and conveying of the leafy vegetables under different feeding amounts are achieved, and low-damage orderly harvesting of the leafy vegetables is completed.

The invention relates to the technical field of non-circular gear emulsion motor operation data processing, in particular to a non-circular gear emulsion motor operation state fault monitoring and early warning method. The method comprises the following steps: acquiring a sample data set, setting an initial penalty factor, and classifying samples in the sample data set to obtain outliers; calculating the importance degree of the vibration data in the outliers when the outliers are positive samples; calculating the importance degree of the vibration data in the outliers when the outliers are negative samples; calculating the importance degree of the current data in the outliers when the outliers are positive samples; calculating the importance degree of the current data in the outlier when the outlier is a negative sample; the importance degree of the outliers is obtained; obtaining an optimized penalty factor according to the importance degree of the outlier and the initial penalty factor; and obtaining an optimized SVM model based on the optimized penalty factor of each outlier, and monitoring the running state of the motor. According to the invention, the accuracy of monitoring the operation fault of the non-circular gear emulsion motor can be improved.

The utility model discloses an aircraft accelerator platform based on gear meshing to adjust variable speed and variable ratio, which comprises a base, an input push rod, an output rod and a driving gear, the output rod and the input push rod are sequentially and rotatably arranged on one side of the base from inside to outside, the driving gear is arranged on one side of the output rod, and the driving gear is rotatably connected with the base; the driving gear comprises a circular gear disc and a non-circular gear block, one side of the circular gear disc is rotationally connected with the base, and the non-circular gear block is fixedly arranged on the other side of the circular gear disc; a circular tooth surface is arranged on the peripheral side of the rotating end of the output rod, and the circular tooth surface of the output rod is meshed with the circular gear disc; one side of the rotating end of the input push rod is provided with a non-circular meshing surface corresponding to the non-circular gear block, and the non-circular meshing surface of the input push rod is meshed with the non-circular gear block; the circular gear disc and the non-circular gear block are different in meshing indexing line. The variable-speed and variable-ratio design of the input push rod and the output rod is achieved through the meshing indexing line proportion of the circular gear disc and the non-circular gear block. Control of transformation ratio is achieved through meshing of the intermediate gears, high-speed movement is more stable, and good practicability is achieved.

The invention discloses a tooth profile generation method of an involute and cycloid combined tooth profile: using Fourier function to fit the transmission ratio curve, there are no two curve segments with a curvature less than the minimum curvature without root cutting, and using a polynomial curve to connect the two curve segments end to end to obtain the transmission ratio curve; after calculating the pitch curve coordinates of the driving and driven non-circular gears, the tooth top part outside the pitch curve of the driving non-circular gear and the tooth root part within the pitch curve of the driven non-circular gear adopts a cycloid tooth profile, and the tooth root part within the pitch curve of the driving non-circular gear and the tooth top part outside the pitch curve of the driven non-circular gear adopts an involute tooth profile; after the tooth top profile of the driving non-circular gear is connected with the tooth root profile, and the tooth top profile of the driven non-circular gear is connected with the tooth root profile, the connecting segments at both ends of the involute tooth profile and the cycloid tooth profile are replaced by a line segment tangent to both the involute tooth profile and the cycloid tooth profile. The invention can generate a tooth profile without root cutting for a transmission ratio curve with too small a curvature.

The invention relates to the technical field of engine crankshafts, and provides a reciprocating engine crankshaft mechanism which comprises a piston, a transmission assembly and an output shaft, and the transmission assembly is composed of a swing arm, a gear ring and a pinion. One end of the swing arm is connected with the piston, and the other end is rigidly connected with the gear ring which is meshed with the pinion in real time to form a power transmission path. Through the structural design of the inner gear ring or the outer gear ring, the conversion from the reciprocating motion of the piston to the continuous rotation of the gear is realized in cooperation with the meshing mode of the standard / eccentric / non-circular gear. The mechanism is in a swing arm hinge type or rigid connection mode, periodic fluctuation of a force arm of a traditional crankshaft mechanism is eliminated through the curve movement characteristic of a gear ring, and it is ensured that the acting force arm keeps stable in the power transmission process. The crankshaft mechanism effectively solves the problem of energy loss caused by the fact that a force arm of a traditional crankshaft mechanism returns to zero near upper and lower dead points, remarkably improves transmission efficiency, reduces vibration and part abrasion, and has the remarkable advantages of improving heat efficiency and operation stability.

The present invention relates to a constant-force clamping and conveying mechanism for leafy vegetables based on a non-circular gear system and a transmission ratio algorithm. The clamping and conveying mechanism includes a frame and a plurality of constant-force clamping modules mounted on the frame. The constant-force clamping module includes a non-circular gear system, which includes a front non-circular gear rotatably connected to a mounting shell, and a rear non-circular gear. The front non-circular gear is transmission-connected to the rear non-circular gear via a plurality of intermediate non-circular gears. A floating connecting rod is fixed to the first rotating shaft, and a floating clamping wheel is mounted on the floating connecting rod. The wheel surface of the floating clamping wheel is pressed against the inner side surface of the clamping conveyor belt. The constant-force clamping module is the core component of the entire clamping and conveying mechanism. By designing the non-circular gear system, the constant-force clamping of the leafy vegetables is achieved. The driving module is used to drive the clamping belt to rotate. The present invention can avoid clamping damage during the mechanical harvesting process of leafy vegetables, realize flexible clamping and conveying of leafy vegetables under different feed amounts, and complete low-damage and orderly harvesting of leafy vegetables.

The invention discloses a non-circular gear tooth profile curved surface optimization method. The method comprises the following steps: step 1, obtaining an original model; step 2, converting into a convergence body; step 3, convergence body quality evaluation: when the sum of the number of edges and the number of patches of the convergence body model is greater than 6000, the quality requirement is met, and the step 4 is executed, otherwise, the step 1 is returned; step 4, carrying out gridding; step 5, carrying out lightweight treatment; step 6, splitting the end face slices; 7, extracting a tooth profile curve; and 8, stretching to form a tooth profile curved surface. On the basis that the efficient modeling advantage of the generation method is reserved, virtual cutting traces are effectively eliminated, the smoothness and geometric accuracy of the tooth profile curved surface are improved, efficient generation of the smooth tooth profile curved surface is achieved, and therefore the design quality of the non-circular gear is improved.

The invention relates to the technical field of agricultural transplanting machinery, and discloses an automatic seedling taking device suitable for tobacco hard plug seedlings, the automatic seedling taking device comprises a seedling taking mechanism, a seedling conveying mechanism and a rack, the seedling taking mechanism adopts a non-circular gear planetary gear train seedling taking mechanism, and is mounted on the inner side of a rack frame through a supporting plate; the driving motor provides power, and chain transmission driving can rotate around the center of a hole of the supporting plate. The supporting plate and the driving motor are fixedly connected with the rack, the non-circular gear and the connecting shaft are mounted in the shell, and the seedling taking arm realizes non-constant-speed rotation through meshing movement of the non-circular gear in the shell, so that a special seedling taking track is realized at the point of the seedling taking needle to take out plug seedlings and transfer the plug seedlings to a seedling dropping position for seedling dropping; continuous progressive transverse seedling supply and longitudinal seedling supply are realized through driving of a stepping motor; under the combined action of the seedling taking mechanism and the seedling conveying mechanism, the seedling taking test bed can realize automatic and continuous seedling taking operation of the whole hard hole tray tobacco seedlings, and is convenient to operate.

High connection low planting mechanism of attitude planet wheel system belongs to agricultural machinery;The upper and lower planet shafts of the first planet wheel system mechanism are rotatably installed with the upper and lower second planet wheel system planting assemblies, the outer ends of the upper and lower planet gears II sleeved on the upper and lower planet shafts are fixed with the upper and lower second gear boxes, one side of the upper and lower planet shafts is fixed with the upper and lower center non-circular gears, the other side is fixed with the upper and lower planet gears I, the center shaft is inserted and fixed with the main gear box at the outer side of the transmission mechanism assembly, the transmission driven gear, the center gears I and II sleeved on the center shaft are fixed with each other, the corresponding gears in the mechanism drive operation according to the required transmission ratio relationship;The mechanism has good planting quality, wide plant spacing adjustment range, reliable work, stable operation and high operation efficiency.

The invention provides a non-circular gear train pot seedling picking and planting integrated mechanism which comprises a rack, a crank rocker mechanism, a planetary arm assembly and a clamping head, a non-circular gear A and a non-circular gear a which are meshed with each other are arranged on the rack, a non-circular gear B, a non-circular gear b, a circular gear A and a circular gear a are arranged on a connecting rod, and the planetary arm assembly further comprises a non-circular gear C and a transmission assembly. The non-circular gear A drives the crank to rotate at a non-uniform speed, the speed of the planet arm is controlled by the relative angular speed of the crank and the connecting rod, and the rotating speed of the clamping head is controlled by the angular speed of the planet arm relative to the connecting rod, so that the clamping head can move according to set requirements, a transverse zero-speed moving track is realized at a seedling planting point, a uniform-speed linear track is realized, and the insertion speed is low.

A method for calculating a transmission ratio of a driving mechanism, and an air conditioner and a driving mechanism. The driving mechanism comprises a driving gear and a driven member engaged with the driving gear, wherein the driving gear is a non-circular gear; and when a transmission ratio of the driving gear to the driven member is a non-constant value, there is a preset function relationship between the transmission ratio and a rotation angle of the driving gear. The function comprises a monotonically increasing interval and / or a monotonically decreasing interval, an absolute value of a derivative at the maximum value and / or the minimum value of the monotonically increasing interval is less than a preset value, and an absolute value of a derivative at the maximum value and / or the minimum value of the monotonically decreasing interval is less than the preset value.

A mop wringing machine comprises a front plate, a first side plate, a second side plate, a bottom plate, a rack, a guide rail, a movable plate, a traction shaft and a driving mechanism. The driving mechanisms drive the traction shaft and the movable plate to move left and right, move rightwards to place a mop and move leftwards to extrude the mop for dewatering, one driving mechanism is a non-circular gear mechanism and comprises a handle, a handle shaft, a first non-circular gear, a second non-circular gear, a pressing wheel and a pressing wheel shaft, the handle and the first non-circular gear are fixedly connected with the handle shaft, the pressing wheel shaft is sleeved with the pressing wheel, and the other driving mechanism is a non-circular gear mechanism. The other set is a cam and four-bar mechanism and comprises a handle, a handle shaft, a cam, a roller, a roller shaft, a roller bar, a common shaft, a rocker and a connecting rod, the handle and the cam are fixedly connected with the handle shaft, the roller is installed on the roller shaft, the rocker and the roller bar are a whole and can rotate around the common shaft, the rocker is hinged to the connecting rod, and the connecting rod is hinged to the cam. The left end of the connecting rod sleeves the traction shaft. Compared with an existing manual wringing machine, the manual wringing machine saves labor and is convenient to operate.

The invention relates to the technical field of emulsion preparation equipment, in particular to a water-based hydraulically-driven emulsion proportioning device which comprises a water-based hydraulically-driven device, a first non-circular gear pump and a second non-circular gear pump, an output shaft of the water-based hydraulic driving device can be driven by a high-pressure water medium to rotate; the first non-circular gear pump and the second non-circular gear pump are respectively connected to an output shaft of the water-based hydraulic driving device; under the driving of the water-based hydraulic driving device, a preset amount of water is output through the first liquid outlet, a preset amount of emulsified oil is output through the second liquid outlet, and after the output water and the emulsified liquid are mixed and stirred, the emulsified liquid with the specific concentration is formed. The water-based hydraulic driving device is adopted as a driving source, and the water-based hydraulic driving device has the advantages that the hydraulic source is easy to obtain, efficiency is high, noise is low, overload safety is excellent, heat is low, and the structural size is small; the proportion of output water and emulsified oil is stable; the control mode is simple and accurate, and reliability and stability are excellent; and the liquid pumping efficiency is higher.

The invention provides a refrigerator. The refrigerator comprises a refrigerator body; the door body is connected to the box body in a sliding manner; an automatic switching unit includes: a driving mechanism configured to provide a driving force; the executing mechanism comprises a first transmission rack, the first transmission rack is configured to move close to the box body or move away from the box body under the action of driving force, the first transmission rack is provided with a plurality of third transmission teeth, and an included angle is formed between the connecting direction of the third transmission teeth and the moving direction of the first transmission rack; the transmission gear train comprises a second transmission gear, the executing mechanism and the driving mechanism are in transmission connection through the second transmission gear, the second transmission gear is a non-circular gear, and the second transmission gear and the first transmission rack can be arranged in a meshed mode. According to the application, greater thrust can be provided at the moment of starting the door body, so that the resistance at the initial stage of opening the door body is overcome, the convenience of opening the door body is improved, and the user experience is improved.

The invention discloses a non-circular gear transmission real-time error compensation and synchronous control system of an intermittent paper feeding mechanism. The non-circular gear transmission real-time error compensation and synchronous control system comprises a double non-circular gear transmission assembly, a driving motor, a non-circular gear pitch curve characteristic detection unit, a paper feeding position detection unit, a controller and a servo driver. A motor encoder, a grating code disc and a laser interferometer are used for collecting an active non-circular gear rotation angle position signal, a pitch curve actual rotation angle difference signal and a paper feeding execution mechanism actual displacement signal respectively; the controller calls a theoretical transmission model to calculate a theoretical rotation angle value and a paper feeding theoretical displacement value of the driven non-circular gear, a pitch curve meshing error and a paper feeding displacement error are obtained through comparison, the rotation angle compensation amount is calculated after coupling analysis, a correction motor control signal is generated to drive a servo driver to adjust a driving motor, and error closed-loop compensation is achieved. The system can sense and compensate the transmission dynamic error of the non-circular gear in real time, and the paper feeding position precision and the transmission stability are improved.

The present invention discloses a three-point contact non-circular gear pair, belonging to the field of gear transmission technology. The non-circular gear A and the non-circular gear B are provided. The tooth profile curve of the non-circular gear A includes a transition arc curve segment A1 and a working arc curve segment A2. The tooth profile curve of the non-circular gear B includes a tooth top chamfered straight line segment B1, a convex arc curve segment B2, a spline curve segment B3, a parabola curve segment B4, a convex arc curve segment B5, and a tooth root chamfered arc segment B6, which are connected in sequence. During the meshing process of the non-circular gears A and B, the working arc curve segment A2 forms a three-point contact with the convex arc curve segment B2, the spline curve segment B3, the parabola curve segment B4, and the convex arc curve segment B5. The non-circular gear pair of the present invention forms a three-point contact during the meshing process and has the characteristics of high load-bearing capacity, low vibration and noise, and long service life.

The invention discloses a seeder, comprising a frame and a non-circular gear planetary wheel sowing mechanism, the frame is fixedly connected with a handle and is rotatably connected to a traction wheel through a rear axle; the non-circular gear planetary wheel sowing mechanism comprises a planetary frame, the planetary frame is fixedly connected to the rear axle, the planetary frame is rotatably connected to three transmission shafts, one end of the transmission shaft is fixedly connected to a non-circular planetary gear meshing with a sun gear, the other end of the transmission shaft is fixedly connected to a circular intermediate gear, the planetary frame is rotatably connected to a hollow shaft, and the hollow shaft is fixedly connected to a circular planetary gear meshing with the circular intermediate gear; a bevel gear shaft fixedly connected to the planetary frame is sleeved in the hollow shaft, and the bevel gear shaft is fixedly connected to a small bevel gear; one end of the hollow shaft is fixedly connected to a seed meter, a large bevel gear meshing with the small bevel gear is rotatably connected in the seed meter, the transmission shaft of the large bevel gear is fixedly connected to a seeding wheel, the seeding wheel is provided with a slotted hole, and the lower end of the seed meter is connected to a hole former, so as to achieve precise sowing and reduce damage to the ground film.

The non-circular gear set comprises a first driving wheel, a first driven wheel, a second driving wheel and a second driven wheel, the first driving wheel and the first driven wheel are meshed with each other, the second driving wheel and the second driven wheel are meshed with each other, the first driving wheel is connected with a power input shaft, and the second driven wheel is connected with a power output shaft; the first driven wheel and the second driving wheel are in key connection or fixed connection through a transmission shaft, the first driving wheel and the second driving wheel are the same in structure, and the first driven wheel and the second driven wheel are the same in structure; the assembly phase between the first driving wheel and the first driven wheel is the same as the assembly phase between the second driving wheel and the second driven wheel. Through related design, when the first driving wheel of the non-circular gear set performs input motion at a constant rotating speed, the second driven wheel can realize large-amplitude high-low speed transition change, and the second driven wheel can realize stable operation, so that the advantages of better carding effect, better dynamic characteristics and longer service life are obtained.

The invention discloses a non-circular gear pair pitch curve design method without a function expression, and the method comprises the following steps: S1, drawing a driving wheel rotation angle-radial curve; s2, extracting point set coordinates; s3, setting a center distance; s4, calculating the rotating angle of the driven wheel; s5, driven wheel pitch curve closure judgment; s6, a driving wheel pitch curve is constructed through spiral lines; s7, a planet carrier is constructed; s8, creating a pitch curve contact point tracking circle; s9, tracking a pitch curve contact point; and S10, connecting the pitch curve contact points in series to form a driven wheel pitch curve. According to the method, any spline curve is drawn to serve as a driving wheel rotation angle-radial curve, data calculation is conducted after point set coordinates are extracted, the driving wheel pitch curve and the driven wheel pitch curve are obtained through spiral line fitting and motion simulation means, complex pitch curve function expression derivation is avoided, design efficiency is high, and the method is easy to implement. And the whole design process is more free, and the method has a good application prospect.

The present application relates to the technical field of air conditioning, and discloses a drive mechanism for an air guide plate of an air conditioner, and an air conditioner. The drive mechanism includes: a first connecting rod provided with a first gear tooth; a second connecting rod provided with a second gear tooth; a first gear, which is a non-circular gear and is used to mesh with the first gear tooth, and the first gear is provided with a first radius variation section; a second gear, which is a non-circular gear and is used to mesh with the second gear tooth, and the second gear is provided with a second radius variation section, and when the first radius variation section meshes with the first gear tooth, the second radius variation section meshes with the second gear tooth; wherein, the change trend of the radius of the first gear in the first radius variation section is opposite to the change trend of the radius of the second gear in the second radius variation section, so that the movement speeds of the first connecting rod and the second connecting rod are unequal. Thus, by setting the radius of the first gear and the second gear, a variety of air guide positions of the air guide plate can be achieved.

The application discloses a kind of non-circular intermittent gear pitch curve design method with quick return characteristic, by analyzing the design process of pitch curve, pitch curve is divided into two categories of functional type and non-functional type, wherein functional type pitch curve is used to meet any given transmission requirement, non-functional pitch curve is used to compensate functional type pitch curve so that it can realize the repair of the defect of rotation.To improve the transmission efficiency of non-circular intermittent gear, a quick return characteristic repair model for non-functional pitch curve design is constructed based on the principle of variation, and the implementation mechanism of the model is studied.Based on the boundary conditions of functional type pitch curve, the analytical solution of the model is derived using Euler-Lagrange equation, and the pitch curve equation of the conjugate external meshing and internal meshing non-circular gear is given.The quick return characteristic repair model not only ensures that the designed N-leaf non-circular intermittent gear meets the rotation constraint requirement, but also makes the transmission efficiency of the non-circular intermittent gear highest.

The utility model discloses an asymmetric variable-speed stirring device driven by a variable-tooth-thickness non-circular gear, which comprises a large motor, the tail end of the large motor is movably connected with an upper bracket and a lower bracket which are parallel to each other and can horizontally rotate around the axis, and the tail end of the lower bracket is provided with a small motor; the tail ends of the small motor and the upper support are movably connected with a driving wheel and a driven wheel respectively, pitch curves of the driving wheel and the driven wheel are a pair of same deformed ellipses, the driving wheel and the driven wheel can output asymmetric variable motion, the driving wheel and the driven wheel are meshed with each other, and a stirring paddle is installed below the driven wheel. According to the utility model, the periodicity of the motion trail of fluid particles can be destroyed in a low-speed state, chaotic mixing is induced, the mixing effect is improved, and the mixing efficiency is improved.

The invention relates to the technical field of engine crankshafts, and provides a reciprocating engine crankshaft mechanism which comprises a piston, a transmission assembly and an output shaft, and the transmission assembly is composed of a swing arm, a gear ring and a pinion. One end of the swing arm is connected with the piston, and the other end is connected with the gear ring which is meshed with the pinion in real time to form a power transmission path. Through the structural design of the inner gear ring or the outer gear ring, the conversion from the reciprocating motion of the piston to the continuous rotation of the gear is realized in cooperation with the meshing mode of the standard / eccentric / non-circular gear. According to the mechanism, periodic fluctuation of a force arm of a traditional crankshaft mechanism is eliminated through swing arm hinging, combined connection, rigid connection and the like by means of the curve movement characteristic of a gear ring, and it is ensured that the acting force arm keeps stable in the power transmission process. The crankshaft mechanism effectively solves the problem of energy loss caused by the fact that a force arm of a traditional crankshaft mechanism returns to zero near upper and lower dead points, remarkably improves transmission efficiency, reduces vibration and part abrasion, and has the remarkable advantages of improving heat efficiency and operation stability.

The invention discloses an optimal design method of a stem clamping type three-arm non-circular gear planetary gear train seedling taking mechanism. According to the method, the optimal attitude angle of the head end of the seedling taking claw at each auxiliary attitude point is taken as a target, and the optimal attitude of the head end of the seedling taking claw at each key attitude point on the seedling taking track is obtained through an intelligent optimization algorithm, so that the optimal planar open-chain two-rod mechanism is obtained; then, optimizing each non-circular gear pitch curve in the non-circular gear planetary gear train by adopting an intelligent optimization algorithm, and taking pitch curve non-roundness, tooth profile overlap ratio, undercutting and transmission ratio amplitude synthesis as an optimization design objective function; and obtaining a weight coefficient for controlling the vector movement amplitude of each node in each stage of transmission and an angular displacement variation proportionality coefficient between a key point difference vector for outputting angular displacement and a key point difference vector for inputting angular displacement in the first stage of transmission, and solving each optimal non-circular gear pitch curve. According to the non-circular gear pitch curve, the phenomena that an existing non-circular gear pitch curve is concaved inwards, cuspidal points exist, and periodicity is poor are avoided.

The application discloses a gear shaping machine quick return characteristic transmission system, which comprises a motor, a crank shaft provided with a cutter, a high-efficiency gear pair transmission unit and a non-circular gear transmission unit arranged between the motor and the crank shaft; the high-efficiency gear pair transmission unit is composed of a first driving gear and a second driven gear; the non-circular gear transmission unit comprises a first non-circular gear and a second non-circular gear, and the angle area of the first non-circular gear is in contact with the angle area of the second non-circular gear in sequence; the second driving gear is coaxial with the first non-circular gear, and the second non-circular gear is coaxial with the crank shaft. In the case that the structures and parameters of other parts of the device are not changed, the original transmission parts between the motor and the crank shaft are replaced by the high-efficiency gear pair transmission unit and the non-circular gear transmission unit, so that the cutter return efficiency is doubled under the condition that the cutter cutting state is consistent with the original cutting state, and the overall machining efficiency is significantly improved.