30 results about "Backlash" patented technology

The invention relates to the technical field of worm and gear transmission, in particular to a low-cost angle measurement positioning and locking device based on a worm gear and a worm. The device comprises a main shaft, a base arranged outside the main shaft, a motor fixed to the base, a worm coaxially connected with an output shaft of the motor and located in the base, a worm gear rotationally connected with the worm and arranged on the main shaft in a sleeving mode, a circular table top fixed to the top end of the main shaft, an anti-dazzling screen fixed on the edge of the table top, and aphotoelectric switch fixed on the base and matched with the anti-dazzling screen. The motor drives the worm gear and the worm to rotate so as to drive the main shaft to rotate freely by 360 degrees,the worm gear and the worm with the variable lead and a stepping motor are used for reliably positioning at corresponding positions according to user requirements, the positioning precision is guaranteed, and the whole device is simple in structure and low in cost. The backlash of the worm gear and the worm is corrected through a backlash adjusting gasket, the idle stroke is eliminated, and the situations that the backlash of the worm gear and the worm becomes large and precision is reduced due to long-time use are avoided.

The invention relates to a gear double-sided meshing detection method. The gear double-sided meshing detection method comprises the following steps: selecting two tested gears to form a tested gear set to perform gear double-sided meshing test, performing data processing on the obtained tested double-sided meshing center distance, and judging the center distance deviation, recording and calculating the actual installation center distance range of the pair of gears according to the backlash, recording the tested gear set in a standard gear test database, and selecting the gear set with the proper actual installation center distance range from the standard gear test database according to the design. The gear double-sided meshing detection method has the advantages that use of a high-precision gear is avoided, and the rate of defective products is reduced.

The invention discloses an NX involute deflection helical cylindrical gear modeling method. The method is a custom feature (hereinafter referred to as UDF) based on NX. The UDF is a hobbing action; custom pairing gear pair parameters can be supported; modified gear can be supported, arbitrary rotation direction switching of helical gear can be supported, switching of driving and driven gear parameters can be supported, deflection or non-deflection straight-tooth gears are compatible, gear pair backlash and gear manufacturing inspection parameters with different parameters and different manufacturing precisions can be output, modleling of cylindrical gears can be realized efficiently and stably, and a tooth model can be generated averagely for 2-4 seconds.

The invention discloses a six-degree-of-freedom kinetic model modeling method for an internal meshing gear pair. The method comprises the following steps: S1, calculating the force arm of the frictionforce between a pair of gear teeth acting on an external gear and an internal gear from entering a meshing area; S2, approximating the comprehensive time-varying stiffness of the internal meshing gear pair in a rectangular wave form; S3, determining the relative displacement of the internal meshing gear pair in the meshing line direction, and determining a gear backlash function, meshing force, friction force and friction torque through the relative displacement in the meshing line direction; S4, performing energy analysis on the whole internal meshing gear pair system, and obtaining a six-degree-of-freedom dynamic differential equation set of the internal meshing gear pair according to the Lagrange equation of free motion; and S5, performing optimization and dimensionless processing on the six-degree-of-freedom kinetic differential equation set. The design is high in accuracy and good in universality.

The invention discloses a worm and gear transmission structure. The worm and gear transmission structure comprises a mounting seat, a motor, a worm and a gear, wherein the worm and the gear are matched with each other, the output end of the motor is connected with one end of the gear, the worm is rotatably arranged on the mounting seat, the motor is movably arranged on the mounting seat, and the worm and gear transmission structure further comprises an elastic part, a first bearing and a bearing seat; and the first bearing sleeves the other end of the gear and fixed to the bearing seat, one end of the elastic part is connected with the mounting seat, and the other end of the elastic part is connected with the bearing seat so as to drive the gear to be close to the worm. Under the action of the elastic part, the worm and the motor can deflect by a certain angle, so that the center distance of the worm and the gear is automatically adjusted, zero-meshing backlash transmission of the worm and the gear is achieved, and the transmission precision of the worm and the gear is effectively guaranteed; and due to the fact that the center distance of the worm and the gear can be automatically adjusted, the machining precision requirement of the worm and the gear can be lowered, and the manufacturing cost of the worm and gear transmission structure is reduced.

The invention discloses a single-point belly supporting device of a two-stage attack angle mechanism and a control method. The single-point belly supporting device comprises a base, a bent knife and a supporting rod base, wherein a first guide rail, a gear rack and a second guide rail are arranged on the two opposite outer side surfaces of the bent knife respectively, a bent knife supporting seat is arranged on the base, a first sliding block and a first gear are arranged on the bent knife supporting seat, a second sliding block and a second gear are arranged on the supporting rod base, the second sliding block is connected to the second guide rail, the second gear is meshed with the gear rack, the first gear and the second gear are meshed with the gear racks on the different side surfaces of the bent knife respectively, and the first gear and the second gear are independently connected with a driving motor. According to the invention, a two-stage angle-of-attack mechanism is adopted to reach a large angle-of-attack range of -30 degrees to 30 degrees, the size is small, the device is suitable for a narrow installation space, a double-motor-driven anti-backlash structure is adopted, the problems of installation errors, structural deformation, gear abrasion and the like are compensated, and the effect of keeping anti-backlash for a long time is achieved.

The invention discloses a method for detecting the backlash control size of a rigid wheel for harmonic drive. According to the method, two or three measuring blocks are adopted to be matched with a two-claw or three-claw inside micrometer for detection; and during measurement, a measuring block is adhered to each of the inner teeth of the rigid gear at an interval of 180 degrees or 120 degrees, and then the outer edge of the measuring head of the two-jaw or three-jaw inside micrometer is in contact with the inner wall of the measuring block to measure the control size H of the rigid gear whenthe harmonic gear is reasonably engaged with the backlash. According to the invention, the width of the measuring block is far greater than the tooth pitch of the harmonic gear, so that the measuringblock does not need to be strictly kept at equal intervals of 180 degrees or 120 degrees, and only the measuring contact of the inside micrometer needs to be ensured to be in contact with the inner wall of the measuring block; any position can be measured and is not limited by a rigid gear tooth groove or a tooth crest; comprehensive detection of the tooth surfaces of the rigid gear and the flexible gear can be realized, and errors caused by single-section detection are avoided; and the space position occupied by the flexible gear in actual assembly is simulated, and the control result is moreaccurate and effective.

The invention relates to a method for adjusting the backlash between a pinion (20) and a rack (10) in a rack-pinion drive. A motor-gearbox assembly (30) including a motor and a gearbox is supported on the bracket (40) by a positioning mechanism (42) for precisely positioning the assembly (30) in a radial position relative to the rack (10). In the method, the assembly (30) is positioned at a first radial distance from the rack (10) by means of a positioning mechanism (42), and a first circumferential backlash between the pinion (20) and the rack (10) at a first position of the pinion (20) along the rack (10) is determined from measurements taken on the input side of the gearbox. The assembly (30) and/or the rack (10) is then positioned to a second position of the pinion (20) along the rack (10), the second position being different from the first position, and a second circumferential backlash between the pinion (20) and the rack (10) at the second position is determined from measurements taken on the input side of the gearbox. A minimum circumferential backlash is determined as a function of the determined first circumferential backlash and the determined second circumferential backlash (and possibly further measurements), and a radial adjustment distance is determined as a function of the determined minimum circumferential backlash. Finally, the motor-gearbox assembly (30) is repositioned in the radial direction towards the rack (10) by means of a positioning mechanism (42) as a function of the determined radial adjustment distance.

The invention discloses a gear backlash adjusting structure and an adjusting method thereof, and belongs to the technical field of gear backlash adjusting structures and adjusting methods thereof. Thetechnical problem to be solved is to provide the improvement of the gear backlash adjusting structure. According to the technical scheme adopted for solving the technical problem, the gear backlash adjusting structure comprises a platform, a slewing bearing mounting hole and an adjusting flange mounting hole are formed in the platform, a slewing bearing is fixedly connected to the slewing bearingmounting hole, an adjusting flange is fixedly connected to the adjusting flange mounting hole, a transition flange is arranged between the slewing bearing and the platform, a motor and a speed reducer are fixedly connected to the lower portion of the adjusting flange, a pinion is arranged on the adjusting flange, the center of the pinion does not coincide with the center of the adjusting flange,the pinion is engaged with the slewing bearing, a spline of the pinion is fixed to the shaft end of the speed reducer, and a notch is formed in the adjusting flange. The gear backlash adjusting structure and the adjusting method thereof are applied to gear backlash adjustment of engineering vehicles.

The invention discloses a supporting device and method capable of eliminating backlash, and belongs to the technical field of machinery. Comprising a roller assembly, an upper sliding block assembly, a middle sliding block assembly and a lower sliding block assembly, and the lower sliding block assembly is located at the bottom of the supporting device and serves as a supporting component of other components; the rear end of the upper sliding block assembly is hinged to the rear end of the lower sliding block assembly, the middle sliding block assembly is located between the front middle portion of the upper sliding block assembly and the front middle portion of the lower sliding block assembly, and the upper inclined face and the lower inclined face are installed in a matched mode through sliding grooves and sliding rail structures so that the middle sliding block assembly can slide along sliding rails of the upper sliding block assembly and the lower sliding block assembly. Therefore, the upper sliding block assembly and the rolling wheel assembly are driven to rotate anticlockwise, the rolling wheel assembly moves in the vertical direction to make contact with equipment, and clearance elimination is completed. The whole process is stable in transition, and equipment cannot be shaken; and the pulling force in the pulling process is adjustable, different pulling forces are applied according to different weight equipment, and clearance elimination of various equipment can be met. And self-locking is achieved through a wedge-shaped structure, and the supporting effect on equipment is achieved.

A method for hysteresis compensation in an actuator and a selector fork that is adjustable by this actuator and guides a sliding sleeve, by means of a state machine, wherein the selector fork is moved by means of the actuator from a first shift position (xDecoup), namely a neutral position, into at least one second shift position (xCoup), namely a gear position, and vice versa, wherein the position of the actuator (phiAtr, phiCoup, phiDecoup), in the event of a shift request into the neutral position (xDecoup) or into the gear position (xCoup), is corrected on the basis of stored mechanical backlash (phiBL) between the actuator and the selector fork and of a sign (+1, 0, −1) generated by the state machine and associated with the particular shift request.

The invention relates to a gear clearance optimization design method for a gear transmission system needing long-term operation such as wind power generation, which can effectively solve the influence of environmental factors such as system load and rotating speed and clearance coupling effect on clearance design. According to the method, the gap coupling model is included, the single-degree-of-freedom radial meshing force model is adopted, and the meshing force model with energy loss included is utilized, so that the solving result can better reflect the actual time domain and frequency domain characteristics of the system. According to the method, different radial clearances and gear backlashes are counted and solved by using a clearance dynamic model, and a reasonable gear clearance is selected by analyzing a spectrogram and comprehensively considering the motion stability and the machining difficulty and cost of different clearances of the gear. According to the invention, a traditional gear transmission system clearance design that a gear backlash and a radial clearance are selected according to a center distance is abandoned, and the influence on the clearance under working conditions of different rotating speeds, loads and the like is considered, so that the clearance is realized at lower cost, and good movement stability is realized.

The invention relates to the technical field of processing machine tool equipment, in particular to a 45-degree swing angle head for a processing machine tool. The 45-degree swing angle head for the processing machine tool comprises a shell, wherein the shell comprises an upper shell and a lower shell; the lower shell is fixedly mounted at the bottom of the upper shell through a bolt; a sealing mechanism capable of reducing the speed of gas, dust and the like which are originally high in speed is arranged between the upper shell and the lower shell; an adsorption assembly capable of preventing scrap iron from entering the shell is arranged in the upper shell; and a gear anti-backlash mechanism capable of eliminating backlash of a gear is arranged in the upper shell. According to the 45-degree swing angle head for the processing machine tool provided by the invention, the gear anti-backlash mechanism is directly connected to a second belt pulley through a motor and then connected onto two first belt pulleys through a synchronous belt, the two first belt pulleys are connected to a small gear at the lower end through a speed reducer, and the small gear is meshed with a large gear, so that the gear anti-backlash effect is achieved; and tensioning wheels are arranged on the two sides of a belt of the belt pulleys, so that the belt can be attached to the belt pulleys more tightly, and the transmission stability of the belt is improved.