20 results about "Non-circular gear" patented technology

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 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.

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 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 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.

The application relates to a reversible swing type dry land pot seedling taking seedling mechanism which belongs to agricultural machinery. A planetary shaft is fixed on a gear box shell of a non-circular gear planetary gear train mechanism, a primary driving gear and a seedling pushing cam are fixed on the other side of the planetary shaft, a seedling taking arm shell is fixed with the planetary gear, a seedling pushing mechanism, a transmission module composed of a primary driving gear, a primary driven gear, a transmission shaft I, a secondary driving gear, a secondary driven gear and a transmission shaft II and a swing module composed of an end face cam I, an end face cam II, a seedling taking compression spring, a seedling taking swing rod I, a seedling taking swing rod II, a seedling taking swing rod shaft, a seedling taking swing rod link I, a seedling taking swing rod link II, a seedling needle sliding block I, a seedling needle sliding block II, a seedling needle I and a seedling needle II are assembled on the seedling taking arm shell to form a seedling taking mechanism assembly. The mechanism can be matched with a continuous transverse seedling providing mechanism to realize seedling taking in a relatively static state, the structure is novel and compact, the damage of seedling needles to seedlings in the seedling taking process is greatly reduced, and the seedling taking efficiency is greatly improved.

The invention belongs to the technical field of mechanical vibration isolation, and particularly relates to a non-circular gear-magnetic negative stiffness coupled quasi-zero stiffness vibration isolation device. According to the non-circular gear-magnetic negative stiffness coupled quasi-zero stiffness vibration isolation device, the non-linear motion characteristic of a non-circular gear transmission mechanism and the adjustable non-contact force of a magnetic negative stiffness mechanism can be combined through a vibration isolator, and the adjustable quasi-zero stiffness characteristic within the wide displacement range is formed near the balance position. Therefore, the low-frequency vibration isolation performance is effectively improved. According to the technical scheme, the non-circular gear-magnetic negative stiffness coupled quasi-zero stiffness vibration isolation device comprises an upper bottom plate and a lower bottom plate which are horizontally arranged and vertically and correspondingly arranged, and vertical guide structures which are connected between the upper bottom plate and the lower bottom plate and symmetrically arranged in the left-right direction; the device is characterized by further comprising a gear rack mechanism and a non-circular gear transmission mechanism which are arranged between the upper bottom plate and the lower bottom plate.

The application discloses a round bale machine rope winding mechanism, mainly comprising a rope feeding rotating arm assembly, a rope guide wheel, a slide way assembly, a swing lever assembly, a transmission gear assembly, a rope pushing slide block assembly, a bale rope heat sealing assembly and the like, the rope feeding rotating arm assembly comprises a spiral groove wheel, a rope feeding claw and a rope winding claw, the slide way assembly comprises a front slide way and a rear slide way, the swing lever assembly comprises a swing lever and a crank, and the transmission gear assembly comprises a worm gear and a non-circular gear, the rope pushing slide block assembly comprises an arm support, a rope pushing rod slide way, a rope pushing rod, a left slide block, a right slide block, a connecting rod and an auxiliary return spring, and the bale rope heat sealing assembly comprises a low-voltage electric heating horizontal fixed plate and a rotating plate, the bale rope winding operation is realized, and the mechanism is simple, the production efficiency is high, and the operation quality is good.

This invention relates to the field of fluid transport technology and discloses a transmission mechanism and control system for a high-pressure micro-flow constant flow pump. The transmission mechanism includes a constant flow pump, which integrates a non-circular gear-crank slider transmission mechanism, a dual-plunger pump body, a stepper motor, and a pressure sensor. The non-circular gear-crank slider transmission mechanism includes a driving non-circular gear, a driven non-circular gear, and a crank slider mechanism, with the slider connected to the plunger. The pitch curves of the driving and driven gears are fully convex curves and satisfy the closure condition. The control system includes control components, which integrate a control circuit board and a touch screen. The control circuit board is equipped with a real-time mechanical kinematics reference calculation module, a pressure-flow raw acquisition and preprocessing module, a first-order deviation correction module, a second-order pulsation suppression correction module, a third-order full-cycle accuracy confirmation module, and a human-machine interaction and data storage module, forming a six-fold progressive closed-loop control.

The invention discloses a self-damping variable-stiffness gear superstructure for a sugarcane leaf collecting and packaging machine, which is characterized by comprising a non-circular gear mechanical superstructure unit cell, a rotation control system and a thin-wall frame, each non-circular gear mechanical superstructure unit cell is composed of an arc-shaped negative Poisson's ratio vibration reduction type non-circular gear ring, a non-circular sun gear, a cylindrical planet gear and a rotating shaft. The rotation control system is composed of a rotation gear, an idle gear and an idle gear supporting shaft. The thin-wall frame comprises a rectangular structure and a Chinese character'tian '-shaped structure. Smooth adjustment of the overall rigidity of the superstructure is achieved by rotating a rotating shaft and changing the relative position relation of a non-circular sun gear, a cylindrical planet gear and an arc-shaped negative Poisson's ratio vibration reduction type non-circular gear ring in a non-circular gear mechanics superstructure unit cell, meanwhile, a negative Poisson's ratio vibration reduction type structure is matched, and the smooth adjustment of the overall rigidity of the superstructure is achieved for a sugarcane leaf collecting and packaging machine under different working conditions. The connecting rigidity of the rack and the machine is adjusted in real time, vibration of the whole machine is reduced, and a feasible design scheme is provided.

The present application relates to the technical field of agricultural machinery equipment, and more particularly to a hybrid six-link pot seedling taking and transplanting integrated mechanism, comprising: a rack assembly, a crank-rocker mechanism, a first motor unit, a planetary gear train assembly, a second motor unit and a seedling taking arm, the hybrid six-link motion mechanism of the present application comprises a driving part and the seedling taking arm, the driving part is the planetary gear train assembly and a planar four-link mechanism, the planar four-link mechanism comprises a rack, a connecting rod, a rocker and a crank which are sequentially hingedly connected, and the planetary gear train assembly is composed of two-stage conjugate non-circular gears fixed on a housing. The planetary gear train assembly and the planar four-link mechanism are matched, and the angle and position of the seedling taking arm are controlled through non-uniform speed transmission of the non-circular gears in the planetary gear train assembly. Optimization of mechanism parameters and non-circular gear pitch curves enables the seedling taking arm to make high-precision movements that are more in line with requirements, and full-automatic pot seedling taking and transplanting integration is achieved.

An enhanced efficiency internal combustion engine is described. The engine may include a piston and a gear assembly capable of causing the duration of a piston power stroke to exceed that of the piston's compression stroke. One example of the engine of the present invention involves a gear assembly with non-circular gear pairs at crank and output shafts. The non-circular gears may increase the duration of the piston down stroke per combustion event, and decrease the duration of the piston up stroke per combustion event, resulting in greater fuel efficiency of the engine. The engine may be employed in various different vehicles or other internal combustion engine-utilizing devices.

The feeding seedling transplanting integrated mechanism belongs to agricultural machinery; the outer end of the planet shaft is fixed to one end of the driving crank through the seedling taking arm shell, the frame shell of the transplanting mechanism assembly is slidably installed on the seedling taking arm shell of the seedling taking mechanism assembly, the driving rocker is hinged to the hinge points of the driving crank and the frame shell respectively, the driving gear fixed to one side of the frame main shaft of the transplanting mechanism assembly is engaged with the rack of the seedling taking arm shell, the primary driving gear fixed to the other side of the frame main shaft is engaged with the primary driven gear fixed to one side of the frame side shaft, the transplanting cam fixed to the frame side shaft is respectively configured and installed with the cam roller, the duckbill push rod, the duckbill connecting rod I, the duckbill connecting rod II, the duckbill upper piece, the duckbill lower piece and the frame shell; the mechanism combines the non-circular gear planetary gear train mechanism with the taking and transplanting integrated mechanism assembly, can realize the taking and transplanting integrated transplanting operation, and has the characteristics of compact structure, stable transplanting effect, good transplanting quality and high operation efficiency.

The invention provides a cam for an unpowered multi joint synchronous training device, wherein the cam has a circular main body, a cam slot is disposed on a first side surface of the circular main body, and a contour of the cam slot is configured such that rotational movement of the cam drives a follower provided in the cam slot to perform variable-speed reciprocation motion along a predetermined horizontal axis, wherein for each rotation of the cam, the follower performs reciprocating motion once between a first position and a second position; the first position and the second position are respectively positions of the follower along the horizontal axis when the follower is at positions of the contour closest to, and farthest from, a center of the circular main body; and the reciprocating motion drives a driven object connected to the follower to perform variable-speed oscillation within a range of an angle. The invention further provides a non-circular gear pair for an unpowered multi joint synchronous training device, a method of manufacturing the cam and the non-circular gear pair, a transmission mechanism using the cam and the non-circular gear pair, and an unpowered multi joint synchronous training device using the transmission mechanism.