136 results about "Shaft alignment" patented technology

The invention discloses a key phase pulse signal synchronous acquisition and multi-axis centering analysis method, which belongs to the technical field of mechanical monitoring and diagnosis, and comprises the following steps of: configuring a synchronous acquisition system, acquiring a conditioned key phase pulse signal and a conditioned vibration signal, and extracting an axis speed and a load; constructing a time drift monitoring model to compensate the key phase pulse signal in real time, and ensuring the time synchronization precision; the compensation signal is input into a shaft centering correction model based on dynamics and finite element analysis, and radial deviation and axial deviation under the dynamic load are calculated; establishing a nonlinear tolerance threshold model by adopting a nonlinear regression model, and dynamically adjusting an allowable centering deviation threshold in combination with the real-time shaft speed and the load; through closed-loop comparison of the shaft centering deviation and a threshold value, a centering qualified conclusion or a correction suggestion is automatically output, and triggering signal resampling is supported to adapt to working condition changes; the real-time and self-adaptive analysis of the centering deviation of the multi-axis system is realized, and the operation stability and the maintenance efficiency of the rotating machinery are improved.

The invention discloses a shaft system alignment key process identification and optimization method based on an error flow model, and the method comprises the steps: constructing an error source set in a shaft system assembly process, and building a related space coordinate system based on an assembly topological relation; establishing a nominal pose transfer equation based on an infinitesimal rigid body coordinate transformation principle; constructing a joint surface contact error vector by combining the diameter of the flange on the basis of a flange opening value and a dislocation value measured on site; performing first-order linearization processing on the nominal pose transfer equation based on the joint surface contact error vector, and obtaining a sensitivity matrix; constructing a state equation for describing error accumulation according to the sensitivity matrix and the error source set; a sensitivity coefficient is constructed based on a state equation and is compared with a judgment threshold, key control characteristics are identified, accurate errors can be predicted by quantifying a transmission mechanism of each error source, and key procedures are accurately identified in combination with the sensitivity coefficient, so that a reasonable strategy is adopted for optimization, and the product quality is ensured to be qualified.

The invention discloses a method for centering a ship shafting provided with a flange connecting bolt, and the method specifically comprises the following steps: supporting the ship shafting to be centered through a temporary support, and enabling the bending and deviation of a flange to meet the design requirements; adjusting the position of the host to enable the bending and deviation of the flange to meet the design requirements; connecting bolts of a shafting flange are installed, nuts are tightened to enable the flange to be connected and fixed, the load of a bearing is measured, the measured load of the bearing is compared with a theoretical load value, when the measured load of the bearing exceeds + / -20% of the theoretical load value, alignment is not successful, a shafting alignment calculation book is restarted, and a new theoretical load value of the bearing is generated; and the shaft system bearing load is readjusted and measured without dismounting the mounted shaft system flange connecting bolts and nuts. According to the method, shafting alignment is carried out without dismounting the connecting bolts of the shafting flange, the original states of the propeller shaft and the intermediate shaft are kept, and the original state of the intermediate bearing can be kept to a large extent.

The invention relates to the technical field of aluminum plate arc rolling and flattening devices, in particular to a double-curved-surface aluminum plate arc rolling and flattening device suitable for different radians, which comprises a main support, an upper support is arranged on one side of the main support, a lower support is arranged on one side of the main support, the upper support and the lower support are coaxially aligned, an upper support is arranged below the upper support, and a lower support is arranged below the lower support. An upper roller is arranged on the inner side of the upper support, an operation assembly is arranged on the inner side of the lower support, and the operation assembly comprises a fixed threaded seat, a lead screw, a hand wheel, a connecting block, a connecting pipe, a lower support, a mounting frame and a lower roller. According to the invention, the distance between the lower roller and the upper roller is adjusted to adapt to hyperboloid aluminum plates with different thicknesses and radians; the rollers with different radians can be quickly replaced by quickly dismounting and mounting the second rotating shaft of the lower roller, so that diversified processing requirements are met; the device is compact in overall structure and easy to adjust and operate, the flattening efficiency and the surface quality of the double-curved-surface aluminum plate are remarkably improved, and the production cost is reduced.

Shaft alignment in machine tools is facilitated. The machine tool includes: a first spindle holding one end of a workpiece; a second spindle holding another end of the workpiece; a sensor detecting a physical quantity related to a vibration during synchronous rotation of the first spindle and the second spindle with the workpiece being held by the first spindle and the second spindle; and a controller performing shaft alignment between the first spindle and the second spindle based on the physical quantity.

An electromagnetic clutch is provided which includes—a selector sleeve arranged in a rotationally fixed manner on a first shaft and is adapted to be shifted linearly along the first shaft between an engaged and a disengaged state, a coupling body which is aligned coaxially to the first shaft, a stator which has a coil which serves to shift an armature ring linearly along the first shaft, the armature ring being mounted radially in an axial guide separately from the first shaft and the coupling body, wherein a shifting of the armature ring by the coil is also accompanied by a shifting of the selector sleeve. A method of closing and opening an electromagnetic clutch is also included herein.

The invention discloses a vertical shaft tunneling device with a supporting structure, and relates to the technical field of vertical shaft tunneling. In order to solve the problems that an existing device is low in tunneling efficiency, poor in supporting stability, inflexible in depth adjustment and the like, the vertical shaft tunneling device with the supporting structure comprises a tunneling assembly and further comprises a supporting assembly fixed to the upper portion of a vertical shaft, and an adjusting assembly is connected to the supporting assembly; the depth exploration assembly slidably penetrates through the center of the supporting assembly and is connected with the adjusting assembly, and the center of the supporting assembly and the center of the adjusting assembly are kept coaxially aligned; the tunneling assembly is connected to the tail end of the depth exploration assembly; the adjusting assembly is matched with the depth exploration assembly to achieve adjustment of the first depth, the second depth and the third depth of the tunneling assembly in the tunneling direction. Flexible adjustment, safety and stability of vertical shaft tunneling operation are guaranteed.

The invention provides a part positioning tool. The part positioning tool comprises a first base, an axial limiting support, a second base and a third base, the axial limiting support, the second base and the third base are sequentially installed on the first base, and a positioning support is arranged on the second base. The third base is provided with a first supporting module used for supporting a part and preventing the part from vibrating during machining, a second supporting module used for conducting self-adaptive supporting on a complex profile on the part, an equal-height alignment block used for aligning the head, provided with a shaft hole, of the part, and a pressing block used for fastening the part. The expansion shaft alignment block is arranged on the equal-height alignment block and used for converting an inner hole datum of a part shaft hole into an outer diameter datum, and the jacking tailstock is used for axially jacking and limiting a part. The axial degree of freedom of a part is jointly limited through the axial limiting support and the jacking tailstock, other degrees of freedom of the part are jointly limited through the positioning support, the supporting module and the pressing block, and the clamping device can be applied to effective clamping and positioning of cylindrical parts with complex structures.

This utility model's electric mining truck gearbox features a three-speed design that allows selection of the most suitable gear based on different working conditions, optimizing power output to meet the power requirements of mining trucks, increasing the coverage of the motor's high-efficiency zone, improving the overall efficiency of the gearbox, and effectively reducing energy consumption. Based on the powerful performance provided by the multi-motor configuration, it enhances the flexibility and efficiency of the drive system. The front intermediate shaft assembly is coaxially connected to the output end of the power coupling assembly, and the rear intermediate shaft extends into the front intermediate shaft assembly and is coaxially aligned with the output end of the power coupling assembly, forming a compact parallel shaft structure. This fully utilizes the radial space of the gearbox and reduces its axial dimensions, thereby reducing the gearbox's volume and facilitating overall vehicle layout. Furthermore, the front and rear intermediate shaft assemblies share the radial and axial loads during transmission, reducing gear stress and improving the transmission stability and reliability under harsh working conditions, thus enhancing the gearbox's adaptability to various operating conditions.

The utility model relates to the technical field of bearing installation, in particular to a bearing installation device for water pump machining, which comprises a base and an installation assembly, and the installation assembly comprises a support, a sliding rail, a sliding block, an installation plate, a bearing mold, a first air cylinder, a second air cylinder and a three-jaw clamp. A bearing mold of a bearing needing to be installed is installed on the installation plate, then a shaft of a water pump is clamped and fixed to the device through the three-jaw clamp, the three-jaw clamp is controlled to ascend and descend through the second air cylinder, and therefore the shaft of the water pump is aligned with the bearing installed on the bearing mold, and the first air cylinder pushes the bearing mold to move at a constant speed. In the process of moving the bearing mold, the sliding block slides on the sliding rail, bearing molds of different models can be detached for replacement and installation when bearings of different models are installed, and the problems that in the using process of an existing device, bearing installation cannot be conducted according to main shafts of different models, devices need to be customized, and installation is not convenient are solved. And the function of the device is single.

The invention discloses a welding positioning and sealing optimization method for a welding sealing nut in the technical field of nut welding, which comprises a base and a vertical rod in threaded connection with the middle axis of the upper part of the base, and further comprises three groups of T-shaped chutes annularly formed in the upper part of the base at equal intervals, and positioning pins for clamping sheet metal parts are slidably connected in the three groups of T-shaped chutes; and a guide area for guiding the sealing nut is arranged at the end part of the positioning pin. Through the collaborative design of the arc-shaped guiding area at the end of the positioning pin and the elastic abutting mechanism of the spring, the problem that an existing fixing shaft pin cannot compensate for the coaxiality deviation of a metal plate hole and a sealing nut is solved, the radius of the inclined face of the guiding area is precisely matched with the inner diameter of the sealing nut, tiny coaxiality deviation can be forcibly corrected, and the machining precision is improved. And in cooperation with the continuous elastic clamping force of the spring, it is ensured that the sealing nut and the metal plate hole are coaxially aligned, dislocation of the sealing ring is avoided, completeness of the sealing contact face is guaranteed, formation of a leakage channel is avoided, and the sealing reliability is remarkably improved.

The utility model relates to the field of crankshaft machining, in particular to a crankshaft outer surface strengthening treatment device. According to the crankshaft outer surface strengthening treatment device, the eccentricity can be adjusted according to the eccentric shaft neck on the crankshaft, rotation with the eccentric shaft neck as the circle center is facilitated, and the more uniform and consistent surface treatment effect is achieved. A crankshaft outer surface strengthening treatment device comprises a bottom plate, a movable support and the like, and the left portion of the bottom plate is connected with the movable support in a sliding mode. The first electric push rod is started to drive the eccentric disc to move forwards or backwards, so that the eccentric shaft neck, close to the outer side, on the crankshaft is aligned with the telescopic shaft, then the first motor drives the crankshaft to rotate, the crankshaft rotates with the eccentric shaft neck as the circle center, and the eccentricity can be adjusted according to the eccentric shaft neck on the crankshaft; and rotation with the eccentric shaft neck as the circle center is facilitated, and the more uniform and consistent surface treatment effect is achieved.

The present application relates to the field of processing measurement technology, and more particularly to a kind of automatic measurement method and system for engine box class part machining aperture.The method includes the following steps: obtaining original aperture image;Using local gradient sliding window to locate initial edge point set, determining the tilt angle of viewing axis and the deflection azimuth angle of major axis based on fitting method, to realize the independent separation of the two;Using the deflection azimuth angle of major axis to construct rotation relationship to obtain spindle alignment point set;Using the tilt angle of viewing axis to carry out projection transformation to obtain orthogonal projection point set;Based on the tilt angle of viewing axis, determine the local object distance drift of each edge pixel point, and then determine the non-uniform magnification correction gain, carry out numerical compensation restoration on orthogonal projection point set, to obtain the final machining aperture size;Output compensation signal to drive machine tool compensation actuator to adjust tool offset value.The present application solves the non-uniform magnification distortion problem caused by probe rod droop, and realizes the true value restoration of space light field.

An absorbing dynamometer system enables testing and alignment of electric motors. In one example, the system includes a dynamometer test stand with a front plate and a fixture plate that supports an electric motor, with their major faces in contact. A carriage mounted to the front plate carries an edge surface of the fixture plate and allows vertical and horizontal movement relative to the front plate. Alignment can be achieved using fixture clamps with spring-loaded ball units that press the fixture plate against the front plate. A first actuator moves a wedge within the carriage, enabling vertical adjustment, while a second actuator facilitates horizontal adjustment.

The fixing tool for the pipe fitting comprises two supporting legs, at least one supporting block is installed on the opposite sides of the supporting legs, the supporting blocks are arranged in pairs, a main shaft is arranged between the two supporting legs, and the two ends of the main shaft are erected on the supporting blocks respectively; the expansion mechanism is used for fixing a to-be-machined workpiece, the to-be-machined workpiece is of a pipe fitting structure, and the expansion mechanism is located in the to-be-machined workpiece; the pressing mechanism is installed at one end of the main shaft and used for pressing one end of a workpiece to be machined; the pressing mechanism is arranged at one end of the main shaft, the abutting mechanism is arranged opposite to the pressing mechanism, and the abutting mechanism is installed at the other end of the main shaft and used for abutting against the other end of the to-be-machined workpiece; wherein the number of the workpieces to be machined is at least two, the expansion mechanism is arranged between the pressing mechanism and the abutting mechanism, and the pressing mechanism is operated so that the end faces of the two adjacent workpieces to be machined can be coaxially aligned. The tool replaces an existing simple tool, the problems of repeated adjustment and positioning and large concentricity error in the welding process are solved, operation is simple and easy to operate, and the quality and the qualified rate of materials are improved.

The utility model relates to the technical field of electric hydraulic jacks, in particular to a portable electric hydraulic jack, which is applied to a walking wheel bearing shaft of large mobile equipment, comprises a cart, and is characterized by further comprising a main shaft dismounting mechanism, a supporting mechanism, an adjusting mechanism and a shaft connecting mechanism, and the trolley is provided with a main shaft dismounting mechanism used for pushing and dismounting the walking wheel bearing of the mobile equipment. The main shaft dismounting mechanism is driven by the supporting mechanism to perform height adjustment, the main shaft dismounting mechanism is aligned with a walking wheel bearing shaft of the large-scale mobile equipment, the main shaft dismounting mechanism and the walking wheel bearing shaft are limited together, the jack main body is started, the jack main body can stably eject a shaft body, and the problem that on the large-scale equipment, the main shaft dismounting mechanism is not prone to being damaged is solved. The technical problems that the operation space of a puller is limited, butt joint is troublesome, and time and labor are wasted when a bearing shaft of the walking wheel is disassembled are solved.

The pneumatic actuator with the high-temperature-resistant function comprises a shell, the shell is of a structure with the two ends open, a heat insulation layer is arranged on the outer side of the shell, a heat insulation shell covering the shell is fixedly connected to the outer side of the shell, heat insulation covers are arranged at the two ends of the shell, and the heat insulation covers are fixedly connected to the outer side of the shell. The heat insulation cover is detachably connected with the shell through a plurality of screws, rotating holes are formed in the top and the bottom of the shell, connecting shafts are rotationally connected into the two rotating holes, the two ends of each connecting shaft penetrate through the heat insulation shell, and an air inlet pipe is fixedly connected to the position, aligned with the connecting shafts, of one side of the shell. According to the pneumatic actuator, the heat insulation effect of the shell can be improved, so that the high-temperature-resistant function of the pneumatic actuator is achieved, gas can be prevented from leaking from a gap between the connecting shaft and the shell, the sealing effect of the pneumatic actuator is improved, leakage between the gas inlet pipe and an external pipeline can be avoided, and the service life of the pneumatic actuator is prolonged. And the air inlet sealing performance of the pneumatic actuator is improved.

A milling head (1) having a rotation axis (x) is used for machining the head (80) of a pile (8), the pile including a pile core (81), a pile sleeve (82), and a metal armor (83) inserted between the two. The milling head includes: a coupling device (13) connectable to a drive shaft (2) of a drive unit; a center milling cutter (11) including a plurality of center chisels (111) mounted on the underside of an inner ring plate (112); and an annular milling cutter (12) including a plurality of annular chisels (121) mounted on the underside of an outer ring plate (122). The center milling cutter (11) and the annular milling cutter (12) are connected to each other coaxially aligned with the rotation axis (x), and the outer ring plate (122) surrounds the inner ring plate (112), while the inner ring plate (112) and the outer ring plate (122) are separated by an intermediate annular region (kr2). According to the invention, the inner ring plate (112) includes at least one conveying opening (1120A, 1120B) extending from the lower side of the inner ring plate (112) to the upper side of the inner ring plate (112), the conveying opening (1120A, 1120B) being adjacent on the lower side to a conveying shovel (119A, 119B) that extends at least partially into the working area of ​​the central chisel (111), and the conveying opening (1120A, 1120B) being adjacent on the upper side to a screw conveyor (113A, 113B).

The application discloses a kind of multi-station coordinated stator wire harness hot sleeve assembly method and system, it is related to motor component assembly technical field;Construction station twin model, AGV distributes material with RFID label according to tempo, PLC dynamic replenishment;After wire stripping and tin, 3D vision guides mechanical arm and inserts wire according to slot, force control adjusts insertion angle;Double-shaft platform adjusts stator and heating coil coaxial alignment, infrared sensor aims sleeve;PLC controls heating power, time, rotates stator to ensure uniform heating, mechanical arm advances sleeve and pressure monitoring;Air cooling-water cooling-natural cooling, temperature feedback adjusts parameter;Insulation, appearance, conduction, tension detection, data binding stator ID upload traceability.The application improves efficiency through digital twin, optimizes hot sleeve parameters to ensure fit quality, graded cooling enhances stability, full-dimension detection and traceability improves controllability, intelligent early warning reduces maintenance cost, adapts to batch production demand.

This application provides a method, apparatus, storage medium, and electronic device for determining the parameters of an elastic flywheel. The method includes: constructing an optimization model and solving the optimization model based on optimization variables, constraints, and an optimization objective to obtain calculation results. The optimization variables are the number of intermediate diaphragms, the thickness of a single intermediate diaphragm, and the positional relationship between any two intermediate diaphragms. The constraints are the total diaphragm thickness and the minimum strength range of the diaphragms. The optimization objective is to minimize the bending stiffness of the intermediate diaphragms. The target solution of the calculation results includes the target number of intermediate diaphragms, the target thickness of each intermediate diaphragm, and the target positional relationship between any two intermediate diaphragms. This method, while ensuring constant torsional stiffness, flexibly controls bending stiffness and strength by combining the number of diaphragms, diaphragm thickness, and diaphragm arrangement order, thus achieving both high reliability and shaft alignment compensation capability.

The utility model discloses a kind of embossing equipment for cake production, specifically relates to the field of cake making, including belt conveyor and the embossing frame being arranged at its one side, the upper portion of embossing frame is rotatably provided with threaded rod one, and the top of threaded rod one extends to the upper portion of embossing frame and is provided with handle one, and the outer wall of threaded rod one is threadedly provided with lifting plate, and the one side of lifting plate is provided with the embossing replacement assembly for embossing cake;By controlling threaded rod two rotation, so that convex block moves outward, moves outward to clamping plate, release to the limit of one side of embossing roller, and then by pulling embossing roller outward, embossing roller can be disassembled;When installing, the end of embossing roller is to the two spline sleeve of its one side, then control two embossing roller to be horizontal state, control threaded rod two reverse rotation, spline sleeve on clamping plate can be aligned with spline shaft, the replacement of embossing roller is completed, the replacement of embossing die is quickly completed, and the convenience of embossing equipment use is improved.

The application relates to the technical field of ship power propulsion and energy saving, and provides a ship main engine flywheel distributed permanent magnet shaft motor system and a control method. The system comprises a main engine, a flywheel and a shafting. The flywheel is coaxially fixed to the output end of a two-stroke low-speed main engine crankshaft and is connected with the shafting. The large gear of the flywheel is directly and constantly engaged with at least two symmetrically arranged small gears. Each small gear is fixed to the rotor of a permanent magnet motor. The rotor axes of the permanent magnet motors are parallel to the shafting. The permanent magnet motors selectively work in a power generation mode, an electric mode or a braking mode. In the electric mode, the permanent magnet motors drive the flywheel to rotate to perform functions such as turning, slow rotation and auxiliary main engine operation. The application does not increase the static and dynamic loads of the shafting bearing, does not change the shafting alignment state and torsional vibration characteristics, the constant engagement structure enables the permanent magnet motor to be mechanically coupled with the flywheel in the whole speed range and can be continuously connected to the grid, and the system has the functions of shaft power generation, electric driving, braking and auxiliary main engine operation.

An out-of-gear preventing mechanism of a gearbox comprises a locking air cylinder and a shifting fork shaft which is fixed to a gearbox shell, a telescopic lock shaft is arranged in a piston cavity of the locking air cylinder and is perpendicular to the gearbox, a piston head is formed by the portion, located in the piston cavity, of the telescopic lock shaft, and the telescopic lock shaft extends out of a shaft body of the locking air cylinder to be arranged in a shaft hole of the gearbox shell in a penetrating mode. An arc-shaped annular groove is formed in the cylindrical surface of a shaft body of the telescopic lock shaft; one end of the compression spring abuts against the piston head, and the other end abuts against the end of the shaft hole. A plurality of arc-shaped grooves are formed in the shifting fork shaft; the telescopic lock shaft is provided with a locking position and an unlocking position, and when the telescopic lock shaft is located at the unlocking position, the arc-shaped annular groove is aligned with the shifting fork shaft, so that the shifting fork shaft can freely and axially move; when the telescopic lock shaft is located at the locking position, the cylindrical surface of the shaft body of the telescopic lock shaft is matched with the arc-shaped groove of the shifting fork shaft in a convex-concave mode so that the axial position of the shifting fork shaft can be locked. According to the utility model, the position of the shifting fork shaft after shifting can be locked, and the out-of-gear phenomenon caused by vibration is avoided.

The invention provides a helical gear aligning assembly tool, and belongs to the technical field of gear machining. The bevel gear is placed on the adjusting table with the positioning pin, the middle movable plate which can ascend and descend and is provided with the inner gear ring for installing and positioning the pinion is arranged above the adjusting table, and meanwhile the adjusting driving piece with the positioning teeth is arranged on the side of the adjusting table so that the angle of the bevel gear can be adjusted. Meanwhile, the middle movable plate is pressed downwards so that the inner gear ring can directly face the positioning pin, and therefore after a mounting shaft of the small gear located by the inner gear ring is aligned with a center hole of the bevel gear, the small gear is pressed downwards through a press machine so that tooth alignment assembly of the small gear and the bevel gear can be achieved, and only the small gear and the bevel gear can be fed in the whole assembly process; the middle movable plate and other structures do not need to be assembled, the assembling precision is guaranteed, the product quality is improved, meanwhile, bevel gear angle adjustment and middle movable plate descending are synchronously achieved, the assembling efficiency is improved, and the large-scale machining requirement is met.

The utility model relates to the technical field of maintenance tools, in particular to a high-precision steam turbine shafting alignment tool which comprises a fixing frame, a fixing clamping plate is fixedly connected to the right side of the bottom of the fixing frame, a sliding clamping plate is arranged on the left side of the fixing clamping plate, a support is arranged in the middle of the right side of the fixing frame, and a sliding table is slidably connected into the support. A dial indicator is fixedly inserted into the right side of the top of the sliding table, a clamping mechanism is arranged in the fixing frame, and an adjusting mechanism is arranged on the right side of the fixing frame. According to the utility model, the clamping of the fixing frame and the lifting adjustment of the dial indicator are realized, and the convenience and adjustability of the device are improved.

The invention relates to a shaft alignment component and a method of aligning a shaft assembly. A shaft assembly includes at least a first shaft section having a first shaft body defining a cavity and a first aperture extending through the first shaft body, and at least a second shaft section having a second shaft body and a second aperture extending through the second shaft body. The second shaft section is received within the cavity of the first shaft body such that the second shaft body translates axially within the cavity relative to the first shaft section. An alignment member is formed in at least the first shaft section, the alignment member being a non-piercing alignment member. The second shaft body contacts the alignment member when the first aperture of the first shaft body is aligned with the second aperture of the second shaft body.

The application provides a self-locking type hoisting arm quick mounting structure and mounting method, belongs to the technical field of tower crane hoisting arm mounting, and aims at the problems of great difficulty in high-altitude pin shaft alignment, need of manual site installation of locking accessories, prominent safety hidden danger of high-altitude operation, and pin shaft disengagement failure caused by missing locking accessories. The application is provided with a hoisting arm side connecting assembly, a main body structure side connecting assembly, and a self-locking locking linkage assembly, a main pin shaft is pre-installed on the hoisting arm, a U-shaped groove and a vertical limiting hole are arranged on the main body double lug plate, a limiting ratchet linkage locking pin shaft with double limiting grooves is used, and automatic locking of the main pin shaft is realized by gravity. The application cancels the high-altitude locking assembly process, simplifies the disassembly and assembly process, improves the assembly efficiency, reduces the labor cost, effectively avoids the high-altitude construction risk, and strengthens the connection reliability after butt joint of the hoisting arm.

The utility model discloses assembling equipment for assembling a belt pulley and a motor, which comprises a moving mechanism sequentially fixed on a workbench, the moving mechanism comprises a placing plate capable of performing horizontal reciprocating rectilinear motion, and the motor is clamped on the placing plate; the lifting mechanism comprises a vibration disc and a lifting plate capable of ascending and descending, a placing sleeve is installed on the lifting plate, and the vibration disc conveys the belt wheel into the placing sleeve; the assembling mechanism comprises a push rod capable of doing reciprocating rectilinear motion back and forth, the axial direction of the push rod is aligned with the output shaft of the motor, and the belt pulley is ejected out by the push rod to be arranged on the output shaft of the motor in a sleeving mode. The device is compact in overall structure, all the mechanisms work in an associated linkage mode, and the production efficiency is high.

A method of exchanging a rack of a rack and pinion drive arrangement, and associated jig assembly, are disclosed. The method includes providing a rack and pinion drive arrangement, with a first rack installed in meshing engagement with the pinions of the gearbox; providing a jig assembly comprising a second toothed rack and a coupling arrangement; arranging the second rack in longitudinal coaxial alignment with the first rack; connecting a first end of the second rack to a proximal end of the first rack, via the coupling arrangement; bringing the second rack into meshing engagement with the pinions of the gearbox by linear displacement of the first and second rack, disconnecting the first rack from the second rack. The nominal rotational position between the respective pinions and primary gears may be calibrated either when the first or the second rack is in meshing engagement with the pinions of the gearbox.