43 results about "Backlash" patented technology

The embodiment of the invention provides a gear anti-backlash assembly and an anti-backlash method. In one specific implementation mode, the method comprises the steps that a fixed gear and an anti-backlash gear are relatively rotated by a preset angle so that an elastic element can be stretched and generate elastic pre-tightening force; the fixed gear is meshed with the working tooth surface of the working gear, and the anti-backlash gear is meshed with the non-working tooth surface of the working gear; the working tooth surface is a tooth surface which is arranged on the working gear and is used for transmitting force; and the non-working tooth surface is positioned on the opposite side of the working tooth surface on the working gear. According to the implementation mode, the structure is simple, the working tooth surface and the non-working tooth surface of the working gear are attached to the fixed gear and the anti-backlash gear all the time through the pre-tightening force of the elastic element, the meshing backlash is eliminated regardless of forward rotation or reverse rotation, and the anti-backlash effect is effective in the whole process. Therefore, the transmission precision is improved.

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.

The invention discloses a gear eccentricity testing mechanism, a mixed eccentricity decoupling method and device and a storage medium, relates to the field of mechanical facilities, and is used for separating and decoupling a single type of eccentricity fault from a mixed eccentricity fault scene. The control circuit is used for controlling the motor driving system to rotate according to the configured step length according to the configured step length; receiving distance data measured by the laser distance measuring sensor at each step length of one circle of rotation of the motor driving system; preprocessing the obtained distance data to obtain first data; extracting root circle information from the first data to decouple position eccentric error information, correcting the first data, extracting addendum circle information to decouple geometric eccentric error information, and extracting gear tooth clearance information to decouple motion eccentric error information. According to the method, multiple single eccentric faults can be separated from fault data caused by mixed eccentric faults at the same time for quantitative traceability, so that the eccentric faults of the gear can be repaired from the source.

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.

The invention discloses a gear and rack type inerter capable of eliminating backlash through double gears, and belongs to the technical field of vibration control. Comprising a base, a rack and the like. The base is divided into three lattices with the same size, the rack is installed in the middle lattice, the large gear and the flywheel are installed in the lattices on the two sides respectively, and the first bearing seat, the second bearing seat, the third bearing seat and the fourth bearing seat are fixed to the base. A first anti-backlash gear shaft supported by a first bearing seat and a second bearing seat is parallel to a second anti-backlash gear shaft supported by a third bearing seat and a fourth bearing seat, the rack is connected with the base in a sliding mode, a gear is installed on one side of the first anti-backlash gear shaft, a flywheel is installed on the other side of the first anti-backlash gear shaft, a gear is installed on one side of the second anti-backlash gear shaft, and a large gear is installed on the other side of the second anti-backlash gear shaft. The gear on the second anti-backlash gear shaft is meshed with the rack, and the large gear is meshed with the gear on the first anti-backlash gear shaft. According to the inerter, the inertia coefficient of the inerter is efficiently amplified through gear speed-up transmission, and meanwhile, the precision of gear transmission is guaranteed through the effect of the anti-backlash gear shaft.

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).

The utility model discloses a slitting machine rolling approaching mechanism, which comprises an approaching roller wall plate, a linear guide rail, a driving mechanism, a transmission mechanism and an approaching roller component, the driving mechanism is arranged at an external appointed position, the approaching roller component and the linear guide rail are arranged on the approaching roller wall plate, and the approaching roller component is driven by the driving mechanism to approach the approaching roller wall plate. And the approaching roller wall plate does linear motion through the transmission mechanism and the linear guide rail. The copper foil winding device has the advantages that when a winding core jumps, winding tension fluctuation is large, the floating roller can absorb the tension fluctuation, the influence on copper foil is reduced, and the winding effect is better; a gear and rack transmission mode is adopted, it can be guaranteed that wallboards on the two sides of the approaching roller are synchronous, the situation that the rollers are not parallel is reduced, and the winding quality is greatly improved; the back clearance of the gear and the rack is made up through pre-pressing of the air cylinder, and the stability of the wall plate is guaranteed.

The invention discloses a simulation observation method for dynamic characteristics of a backlash in gear transmission. The method comprises the following steps: defining a nonlinear backlash characteristic function according to dead zone characteristics in gear transmission; performing periodic continuation on a preset square wave function to obtain variable torsional rigidity; establishing a gear transmission model according to the backlash characteristic function and the variable torsional rigidity; the input torque of the gear transmission model is obtained in a closed-loop input mode, simulation initialization setting is conducted on the gear transmission model, and dynamic characteristics of the backlash are observed through simulation. The input torque of the gear transmission model is obtained through closed-loop control of the motion parameters, the initial backlash input is set, the dynamic characteristics of the backlash are observed through simulation, and the problem that the input characteristics of gear transmission in a real mechanical system cannot be simulated through open-loop input is solved.

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.

1. Name of the Design Product: Zero-backlash Rack (Arc). 2. Use of the Design Product: As a component for power transmission in cooperation with a gear. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photograph that Best Illustrates the Design Key Points: Perspective view.

The zero-back-clearance ninety-degree double-worm and worm gear mechanism comprises a first worm mechanism, a second worm mechanism and a worm gear, the first worm mechanism and the second worm mechanism are arranged in a ninety-degree mode, the first worm mechanism and the second worm mechanism are both in meshing transmission with the worm gear, the first worm mechanism comprises a first worm, and the second worm mechanism comprises a second worm. The first deep groove ball bearing mechanism and the coupler are sequentially connected with one side of the first worm from inside to outside, the second deep groove ball bearing and the first bevel gear are sequentially connected with the other side of the first worm from inside to outside, and the coupler is connected with the motor; the second worm mechanism comprises a second worm, a third deep groove ball bearing mechanism, a first spring washer and an angular contact bearing mechanism which are sequentially connected with one side of the second worm from inside to outside, and a fourth deep groove ball bearing mechanism, a second spring washer and a second bevel gear which are sequentially connected with the other side of the second worm from inside to outside. The second bevel gear and the first bevel gear are in meshing transmission, zero return backlash is achieved, and the transmission precision is higher.

The utility model belongs to the technical field of gears, and particularly relates to a double-spur-gear anti-backlash synchronizing device which comprises a synchronizing transition plate, a support is installed on the synchronizing transition plate, an encoder is arranged on the support, an orientation synchronizing shaft is arranged on the synchronizing transition plate, a screw is connected to the synchronizing transition plate in a threaded mode, and the encoder is arranged on the orientation synchronizing shaft. And a coupling is arranged below the encoder. According to the double-spur-gear anti-backlash synchronizing device, the position between the first anti-backlash gear and the second anti-backlash gear is controlled through the encoder, the direction synchronizing shaft and the coupler, transmission with the main shaft gear is achieved through the pretension force of the first spring between the first anti-backlash gear and the second anti-backlash gear, and backlash elimination is achieved; and the connecting rod is loosened and shifted downwards to enable the clamping block to release clamping connection with the clamping block, the connecting plate can be driven to reset downwards under the elastic reset effect of the elastic telescopic rod, so that the arc-shaped clamping tooth plate is clamped into the clamping tooth ring again, the position of the first anti-backlash gear is fixed, and operation is easy, convenient and fast.

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.

Described herein is a process for monitoring backlash in a gear mechanism of a joint (50) of an industrial robot (10), wherein the joint comprises: a first joint body (52) and a second joint body (54), a motor (51) and a motion transmission assembly (53, 55), the first joint body (52) and the second joint body (54) being coupled together with the possibility of movement relative to each other, the motor (51) being provided with an encoder (56), the motion transmission assembly (53, 55) being designed to transmit a torque generated by the motor (51) to the second joint body (54) in order to bring about a movement of the second joint body (54) relative to the first joint body (52), the transmission assembly (53, 55) comprising the gear mechanism. The process is characterized in that the signal of the encoder (56) of the motor (51) for driving the joint is used without providing any additional sensor specifically dedicated to monitoring backlash.

The invention relates to a method for solving unbalance loading of an intersecting axis variable-thickness gear based on taper angle adjustment. The method comprises the following steps that initial design parameters of the variable-thickness gear are determined; establishing a backlash-free meshing equation of the intersecting axis variable-thickness gear; when no-backlash meshing transmission is realized only on the section end face of the intersecting shaft thickened gear pair and backlashes exist among gear teeth at other positions, calculating backlash values of different end faces of the thickened gear; adjusting the taper angle of the variable-thickness gear: firstly, according to the large and small end backlash values of the variable-thickness gear obtained in the step 3, defining a backlash constant # imgabs0 #, performing improvement according to a backlash-free meshing equation, adding a constant item # imgabs1 # to the equation to obtain an improved large and small end backlash-free meshing equation, and combining the relationship between the large and small end displacement coefficient of the gear and the pitch surface end displacement coefficient to adjust the taper angle of the variable-thickness gear. Large and small end displacement coefficients of the two gears are obtained, and a new gear bevel angle is deduced according to the newly obtained large and small end displacement coefficients. The problem of large and small end unbalance loading frequently occurring in transmission of the intersecting shaft thickened gear is solved, tooth surface modification is not needed, through taper angle adjustment, uniform distribution of backlash on tooth width and reasonable contact position are achieved, and the purpose of improving unbalance loading is achieved.

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.

Assembly comprising a rotating unit (13, 20) and a support (11), wherein the rotating unit comprises a rotating element (13) and a hooking lever (20). The hooking lever (20) comprises a first lever part (21) mounted on an end (14a) of a shaft (14) of the rotating element (13) and is provided with a first clip (21d) configured to snap on a first hooking seat (14e) formed on an end (14a) of the shaft (14), and a second lever part (23) hinged to the first lever part (21). The second lever part (23) is provided with a second clip (23e) configured to snap on a second hooking seat (21g) formed on the first lever part (21). The second lever part (23) is provided with a cam profile (23g) configured to lift the hooking lever (20) and the shaft (14) relative to the support (11), recovering axial backlash between the rotating element (13) and the support (11). The second lever part (23) is provided with a force transmission portion (23a") configured to be coupled with a device for controlling the rotating element (13).

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 eccentric shaft adjusting device for the gear meshing backlash of the rotating mechanism comprises a rotating disc structure, an upper positioning ring and a lower positioning ring are welded to the top and the bottom of the rotating disc structure in advance, and the rotating disc structure is integrally machined and formed through a machining center so that the concentricity of the upper positioning ring and the lower positioning ring can be guaranteed; the speed reducer is installed in the rotating disc structure from top to bottom in the vertical direction, the central axis of the speed reducer and the central axis of the rotating disc structure are eccentrically arranged, the speed reducer is rotationally connected with a flange plate through a connecting flange, the flange plate is in bolt connection with the upper positioning ring, and the connecting flange, the flange plate and the rotating disc structure are concentrically arranged. The speed reducer can rotate in the circumferential direction around the central axis of the flange plate through the connecting flange. Through cooperation of the eccentric shaft structure and the positioning ring, rapid and accurate adjustment of the gear meshing backlash is achieved, on-site welding is avoided, and the assembly precision and efficiency are improved.