26 results about "Backlash" patented technology

According to the robot joint motor output position evaluation method and device and the storage medium, the encoder positions of the two engaged gears are reconstructed to obtain the number of rotation turns and the reconstruction position of the main gear, the difference between the reconstruction position of the main gear and the encoder position of the main gear is compared, and the output position of the robot joint motor is evaluated. And extracting the angle difference value as an evaluation index of the multi-circle value reliability. And judging whether the multi-circle value of the main gear is reliable or not by judging the reliability index in the rotating process. Finally, whether the multi-turn value analyzed by the positions of the two gear encoders is absolutely reliable or not is utilized, the influence of the encoder precision, the gear precision, the gear back clearance and other factors on analysis of the multi-turn value is eliminated, and the product consistency and reliability margin can be judged in the production process.

The invention discloses a reverse clearance compensation method and device, a numerical control system, a storage medium and a computer program product, and the method comprises the steps: determining target increment compensation time for carrying out reverse clearance increment compensation according to a reverse jump value of a motion axis of a numerical control machine tool and a preset function relation model of the reverse jump value and the increment compensation time; according to the reverse gap maximum value, the target increment compensation time and a preset formula, determining compensation values for performing reverse gap increment compensation on the motion shaft in different motion states; and performing increment compensation on the reverse gap according to the compensation value within the target increment compensation time. According to the scheme, reverse gap errors of different scenes are counteracted, the change rhythm is controlled through the target compensation time, mechanical impact and vibration of the machine tool are reduced, and operation stability and positioning precision are improved.

The invention discloses a double-gear rack backlash eliminating structure and a method thereof.The double-gear rack backlash eliminating structure comprises an auxiliary gear capable of being in clearance fit with a reverse shaft in the double-gear rack structure and further comprises a reverse gear capable of being in interference fit with the reverse shaft, shaft holes of the reverse gear and the auxiliary gear are coaxially arranged in an overlapped mode, and the gear parameters of the reverse gear and the auxiliary gear are the same. Both the reverse gear and the auxiliary gear can be engaged with the rack unit to adjust the return difference between the reverse gear and the auxiliary gear and the rack unit; the edges of the reverse gear and the auxiliary gear are connected together through a pressing unit; the rack unit comprises a first rack and a second rack, the first rack and the second rack are connected together through a plurality of fastening bolts, and the first tooth top edge of the first rack is flush with the second tooth top edge of the second rack; the pressing unit comprises a first hollow disc and a second hollow disc. The problem that in the prior art, a transmission backlash between a bidirectional gear and a rack is not easy to adjust accurately is solved.

The invention relates to the field of rolling, and discloses an anti-backlash device, an anti-backlash control method and rolling equipment, the anti-backlash device comprises two bearing seats, a bearing set, a jacking structure and a hydraulic driving part, the two bearing seats are provided with mounting cavities in a penetrating mode in the first direction, one side face of each bearing seat is provided with a containing cavity, and the containing cavities communicate with the mounting cavities; the two ends, in the first direction, of the roller are each provided with a rotating shaft, the rotating shafts are located in the corresponding installation cavities, each installation cavity is internally provided with a bearing set, each bearing set comprises a third bearing, the jacking structure abuts against the third bearing, the hydraulic driving part is in transmission connection with the jacking structure, and the hydraulic driving part drives the jacking structure to abut against the third bearing. The hydraulic driving part drives the jacking structure to continuously and stably apply the pre-tightening force to the third bearing, a thread jackscrew structure which is prone to loosening and losing efficacy is replaced, the problem that the pre-tightening force is attenuated or lost due to vibration and loads is effectively solved, and therefore the anti-backlash effect can be reliably maintained for a long time.

This invention provides a multi-stage reduction gearbox with a flexible shaft and an adaptive zero-backlash gearbox, and its backlash elimination assembly method. The gearbox includes a housing and a multi-stage gear transmission mechanism, and also includes a backlash elimination mechanism. The backlash elimination mechanism includes a backlash elimination gear set meshing with each stage of the gear pair, a flexible shaft, and a locking mechanism, forming a parallel backlash elimination transmission branch. During assembly, a reverse preload is applied to the backlash elimination gear set to cause the flexible shaft to twist and deform, and then the locking mechanism locks it to maintain an elastic preload state. This invention uses a single backlash elimination mechanism to simultaneously eliminate backlash in multiple stages, simplifying assembly; it utilizes the elastic restoring torque of the flexible shaft instead of rigid fixing, providing impact resistance and reliable operation; it can adaptively compensate for backlash after gear wear, achieving zero-backlash transmission throughout its lifespan; it reduces the requirements for bearing precision and significantly reduces manufacturing costs.

1. Name of the product in this design: Irregular Roller Ring (5). 2. Application of this design: Rollers used to control speed and backlash in steel rolling mills. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model. 5. The rear view, left view, and right view are the same as the front view, so the rear view, left view, and right view are omitted; the bottom view is the same as the top view, so the bottom view is omitted.

The invention relates to a spring loading double-piece gear backlash eliminating device which comprises a common gear (1), a backlash eliminating gear (2), a spring box (3), a ratchet wheel (4) and a lock pin combination mechanism (5), the spring box (3) is composed of a box body (301), a cover (302), a spring (303) and a mandrel (304), and the two ends of the spring (303) are fixed to the mandrel (304) and the box body (301) respectively. The common gear (1) is fixed to a spring box cover (302) through a screw (7), the anti-backlash gear (2) is connected to a mandrel (304) in a sleeved mode through a flat key (8) and a locking nut (9), and an alignment hole is formed in the tooth surface of the anti-backlash gear (2). The lock pin combination mechanism (5) controls separation of a lock pin pawl (502) and the ratchet wheel (4) through a lock pin handle (501), and double gears are staggered by a tiny angle through spring force of a spring (303). Friction plates (12) are arranged on the two sides of the anti-backlash gear (2) and the ratchet wheel (4), and the pre-tightening force is adjusted through trapezoidal nuts (10 / 11) and limiting nuts (13).

This invention provides a device and method for adjusting clamping force with high stability, belonging to the field of machining clamping technology. The device includes a support base, a positioning sleeve, a compression spring, a guide key, a lead screw nut, a lead screw, and a flange. The positioning sleeve forms an axial sliding fit with the support base via the guide key. The compression spring is installed between the positioning sleeve and the support base. The lead screw and lead screw nut form a transmission pair. The flange preloads the lead screw nut to eliminate transmission backlash. This invention achieves pressure retention even when power is off by storing energy in the compression spring. The clamping force is precisely controlled by the spring compression, solving the problems of unstable force, the need for a constantly powered motor, and easy loosening and deformation in traditional clamping methods. It has advantages such as constant clamping force, no backlash, high efficiency and reliability, and long service life, and is suitable for positioning and clamping various mechanical parts during machining.

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.

This invention discloses a design method for a tapered, unequal-clearance helical bevel gear for aero-engines, belonging to the technical field of aero-engine transmission systems. The method includes: Step 1, selecting the dimensions of the driving gear; Step 2, selecting the number of teeth z and the transverse module m. t Step 3: Determine the gear tooth width b; Step 4: Select the gear helix angle β. m Step 5: Select the gear helix direction; Step 6: Determine the gear pressure angle α. n Step 7: Determine the addendum coefficient and clearance coefficient c. * Step 8: Determine the displacement coefficient x; Step 9: Select the tangential displacement coefficient x t Step 10: Determine the tooth backlash of the gear pair; Step 11: Calculate the gear tooth parameters. This is done by selecting the addendum coefficient and clearance coefficient c. * The tooth structure parameters and meshing clearance of the tapered tooth unequal clearance spiral bevel gear pair are designed to increase the overlap ratio during gear meshing, improve the load-bearing capacity of the gear pair, and reduce the structural size and weight of the gear pair.

The invention discloses an involute cylindrical gear pair transmission design method based on a displacement coefficient, which comprises the following steps of: starting from a backlash-free meshing equation, borrowing parameters which influence bearing capacity, transmission stability and addendum strength, and taking addendum thickness and coincidence degree which are suitable for transmission quality index dimensions of different forms of gears as a path; according to the method, a displacement coefficient adaptability rapid solving method corresponding to zero transmission, positive displacement transmission and negative displacement transmission quality indexes is analyzed, summarized and summarized, so that the confusion of illustration and table look-up in the existing gear transmission design is solved, the defects of traditional experience evaluation, experience analysis and the like are overcome, and in the cylindrical gear pair transmission design process, the design efficiency is improved. The required displacement coefficient can be reasonably solved according to the use requirements such as stability and strength, and the operation difficulty of designers is reduced.

Architectures and techniques are described that can facilitate detection of backlash or other elements of lost motion that can be exhibited in a gear train of an actuator that controls a fluid flow control device such as a damper, valve, or other suitable structure. Further described are techniques to mitigate said lost motion in the context of fluid flow control devices such as by adding a spring assembly that mitigates error or deviation of a fluid flow measurement due to lost motion.

The invention discloses a planetary roller screw bearing characteristic analysis method considering roller deflection and pitch errors, and belongs to the field of planetary roller screws. The method comprises the following steps: firstly, establishing a roller deflection model according to a gear pair backlash, and calculating a meshing clearance caused by deflection; meanwhile, a screw pitch error model of the lead screw, the nut and the roller is established according to the number of thread heads. And further, the error amount is used as an initial geometric deviation to be embedded into a planetary roller screw basic mechanical model based on a deformation coordination and force balance principle, a nonlinear load distribution equation set reflecting the error coupling influence is constructed, and solving is carried out through an iterative algorithm. Finally, the rule of the influence of the roller deflection angle and the pitch error on the thread load distribution uniformity and the maximum bearing capacity is revealed through parameterized analysis. According to the method, a theoretical basis closer to the actual working condition is provided for precision design, tolerance distribution and performance optimization of the planetary roller screw.

The application relates to a measuring device and a measuring method of a worm and gear assembly, in particular to a meshing center distance measuring device of a worm and gear and an empty return error measuring method, which are used for solving the problems that the existing measuring device and measuring method cannot realize the accurate measurement of the meshing center distance of the worm and gear and are difficult to measure the meshing empty return error of the worm and gear under different center distances. The meshing center distance measuring device of the worm and gear comprises a base, a grating ruler, a linear guide rail, a worm assembly and a gear assembly. The application can be used for measuring the meshing center distance of the worm and gear before the worm and gear are assembled and measuring the size of the empty return error under different meshing conditions. The application has the advantages of high measuring precision, short measuring period and low measuring cost.

The present application belongs to the technical field of gear assembly, and discloses a bevel gear virtual assembly method. The method can realize modeling of a pair of bevel gears through three-dimensional drawing software, and realize gear assembly, error adjustment and rotation of a small bevel gear by using coordinate transformation; the tooth surface contact area is obtained through interference elimination, contact mark simulation and mark edge optimization, and finally the backlash is obtained through a backlash obtaining step. The method can not only save the steps of grid division and grid quality control, but also quickly and accurately obtain the working tooth surface contact area and the backlash of the non-working tooth surface, and is simple in logic, easy to understand and program.

This application discloses a gear backlash detection device, relating to the field of gear backlash detection. It includes a chassis, a fixed base, a movable base, an L-shaped rod, and a fixing assembly. The L-shaped rod has a locking component inside, and the chassis has a movable assembly inside. The outer expansion block expands outward through the cooperation of the insertion rod and the outer expansion block, thereby causing the inner support plate to expand outward via a compression spring and the limiting action of the insertion rod. The inner support plate then presses and fixes the inner side of the gear. This device is easy to install and can accommodate gears with different inner diameters. The movable base is moved by rotating the threaded rod. After the movable base moves to the appropriate position, the rotating disk is released. Under the reset action of the tension spring, the rotating disk drives the insertion cylinder to cooperate with the fixed cylinder, locking the fixed cylinder and thus the threaded shaft. This facilitates fixing the threaded rod and prevents the movable base from moving due to the rotation of the threaded rod, which could affect gear meshing.

The utility model discloses a kind of driving gear anti-backlash devices, including driving shaft, main shaft, fixed driving gear, anti-backlash driving gear, disc spring, limit flange, expansion sleeve, locating nut and shell;Driving shaft is coaxially fixedly connected with main shaft through expansion sleeve, main shaft is installed in shell through a group of support bearings, fixed driving gear is fixedly connected on main shaft, anti-backlash driving gear is installed on main shaft through the sliding installation structure of axial direction;Limit flange is installed on main shaft, disc spring is installed between limit flange and anti-backlash driving gear;Locating nut is installed on main shaft by thread, limit flange is pressed by locating nut.In transmission process, the axial position of anti-backlash driving gear will be adjusted by the elastic force of disc spring, so that anti-backlash driving gear keeps close contact with driven gear at all times, plays the role of self-adapting anti-backlash, thereby eliminating or reducing the movement error and the problem of vibration caused by uneven gap.

The invention discloses an integrated composite roller guide rail based on a cycloid curve, and belongs to the technical field of cam cycloid roller guide rails, the integrated composite roller guide rail mainly comprises a base plate, a motor, a gear ring assembly, a roller assembly and a supporting assembly, and the gear ring assembly comprises any one of a first outer gear ring, a second outer gear ring, a third outer gear ring or an inner gear ring; the base plate, the motor, the gear ring assembly, the roller assemblies and the supporting assemblies are integrally designed to replace a crossed roller bearing, the number of parts is reduced, the structure is compact, assembling is easy and convenient, automatic center correction and constant pre-pressing are achieved, a balance structure is formed by the multiple roller assemblies and the supporting assemblies, center deviation and back clearance are effectively eliminated, and the service life is prolonged. V / inverted V-shaped rollers are used for double-sided support, so that uniform stress, low-vibration operation, no lubrication and high environment resistance are ensured, and the roller bearing is suitable for dust, humidity and oil-free environments, high in repeated precision and long-term stability, constant in rolling contact, extremely low in abrasion and long in maintenance period.

The invention relates to the technical field of transmission, in particular to a structure for eliminating gear backlash and a manufacturing method, the structure comprises a connecting piece, at least two sub-gears and elastic pre-tightening pieces arranged between the adjacent sub-gears; the connecting piece is sleeved with the sub-gears, and limiting parts are arranged on the end faces of the sub-gears. The two ends of the elastic pre-tightening piece are in contact with and abut against the limiting parts of the adjacent sub-gears on the two sides correspondingly, and pre-tightening force in the opposite directions is provided for the adjacent sub-gears on the two sides, so that a dislocation angle exists between any two opposite teeth of the adjacent sub-gears on the two sides. Through simple combination of the connecting piece, the sub-gear and the elastic pre-tightening piece, the number of parts is small, the matching relation is simple and clear, and a complex positioning tool is not needed; only simple steps such as preassembling, press fitting and detecting are needed for assembling, the complex assembling procedure in the prior art is simplified, and the assembling difficulty and the production and manufacturing cost are remarkably reduced.

The utility model discloses a zero-backlash split type roller cam structure which comprises a main body, a rotating tower is installed above the main body, a roller bearing is installed on the rotating tower, a fixing bolt is installed on the roller bearing, and a rotary table bearing is installed on the rear side of the rotating tower. The zero-backlash split type roller cam structure can be accurately positioned, and the accuracy is greatly improved. Rolling transmission of the roller and the cam improves positioning speed and efficiency, and ineffective positioning time is shortened. The pre-pressing design ensures zero back clearance, the structure is free of maintenance, and the later cost and workload are reduced. The contact surface of the roller and the cam is large, the rigidity is higher than that of a worm and gear structure rotary table, and the rotary table is more competitive in application scenes such as industrial equipment with high requirements for high precision, high efficiency and stability.

A fixing platform (3), comprises a baseplate (32), a securing component (34) provided on the baseplate (32); a balancing weight (36) coupled to a terminal arm (10) of an industrial robot (1); and a cylinder (38) provided on the baseplate (32) and adjacent to the securing component (34). The cylinder (38) comprises a plunger (380) configured to move along a first direction (L1) to clamp the balancing weight (36) when the balancing weight (36) is coupled to the securing component (34). A method of automatically measuring a backlash of a gear (400) is also provided.

To mount a non-rotating tool on a tool table that can rotate the tool via a gear train with backlash, and to prevent the tool from wobbling due to backlash when the tool is stopped and in use without complicating the structure, the tool comprises: a spindle (33) that holds the cutting tool (85) in a manner that allows it to be loaded and unloaded in the direction of axis (C3); a gear train (33) that transmits rotation to the held cutting tool (85); a pull rod (34) that moves the cutting tool (85) in the direction of axis (C3); and a piston (36) configured to move in the direction of axis (C3) between a rearmost position and a foremost position, wherein a coupling (convex-concave shape (36c, 34c)) is formed between the piston (36) and the pull rod (34) that allows them to rotate integrally in a contact state, and the piston (36) stops at an intermediate position between the rearmost position and the foremost position.

This invention discloses an eccentric shaft adjustment device and method for adjusting the gear meshing backlash of a rotating mechanism. The device includes a turntable structure with an upper and lower positioning ring pre-welded to its top and bottom, and integrally machined by a machining center to ensure concentricity. A reducer is vertically installed into the turntable structure from top to bottom, with its central axis eccentrically positioned to the turntable structure's central axis. The reducer is rotatably connected to a flange via a connecting flange, which is bolted to the upper positioning ring. The connecting flange, flange, and turntable structure are concentrically arranged, allowing the reducer to rotate circumferentially around the flange's central axis via the connecting flange. This invention achieves rapid and precise adjustment of gear meshing backlash through the cooperation of the eccentric shaft structure and the positioning rings, avoiding on-site welding and improving assembly accuracy and efficiency.

This application discloses an automatic detection method and system for pulley runout in water pumps. The method includes: sequentially acquiring the angular position and displacement values ​​during the first forward rotation, reverse rotation, and second forward rotation of the pulley under the same clamping conditions; reversing the reverse displacement data and extracting low-order periodic components from both the reverse and first forward displacement data, and obtaining the backlash angle through cross-correlation to correct the angular coordinates of the reverse data; interpolating the three displacement data segments to the same angular grid, fitting the positional variation term based on the difference between the two forward data segments, and correcting the first forward displacement value accordingly; then using the corrected three displacement values ​​as input, solving for the common geometric components through robust least squares, and using the difference between the maximum and minimum values ​​within one revolution as the pulley runout value. This application can reduce the impact of commutation backlash, clamping positional variations, and abnormal sampling on the detection results, improving the repeatability and reliability of the detection.

The invention discloses a gear clearance error compensation method, device and equipment and a storage medium, and relates to the technical field of precision motion control, and the method comprises the steps: obtaining a motor shaft angle and a load shaft angle at a current moment in response to a received instruction angle; determining a feed-forward compensation amount corresponding to the gear clearance according to the motor shaft angle and the load shaft angle; and outputting a control instruction according to the feedforward compensation amount and the instruction angle to drive the load to move, so that the load moves to the instruction angle. The feed-forward compensation amount corresponding to the gear clearance is determined through the motor shaft angle and the load shaft angle, and then the control instruction is output by using the feed-forward compensation amount and the instruction angle to drive the load to move to the instruction angle, so that compared with the prior art, the gear clearance error compensation is realized, and the error compensation precision is improved. And the positioning precision of the system is effectively improved.

The invention provides a gear system dynamics modeling method and device considering a basic translation non-inertial system, and the method comprises the steps: dividing a gear system into a shaft system substructure and a box body substructure based on a multi-flexible body system dynamics theory, and building the dynamics equations of the shaft system substructure and the box body substructure; performing model order reduction on the box body, retaining a main mode and a constraint mode, and generating a box body order reduction kinetic equation with reduced degree of freedom; establishing a gear shaft dynamical model, and recording a compound motion effect of shaft system acceleration translation and rotation; bearing coupling is achieved through multi-point constraint, and shaft system node bearing force is equivalently distributed to box body bearing hole flexible nodes; establishing a gear meshing coupling model, introducing a gear backlash, a meshing error and time-varying meshing stiffness, and representing nonlinear dynamic characteristics of a gear pair; and coupling the kinetic equations of the shaft system, the box body, the bearing and the gear to form a system overall model, and solving the kinetic response of the system overall model. The engineering application cost can be reduced.