60 results about "Stub axle" patented technology

The invention relates to a weld bead cleaning device based on rhombic magnetic wheel layout and double-frequency ultrasonic waves. The weld bead cleaning device comprises a rack, two sets of short-axis magnetic wheels, two long-axis magnetic wheels, an adjustable clamping mechanism, a double-frequency ultrasonic wave disintegrating slag cleaning unit, a driving motor, a power source and a control module. The two groups of short-axis magnetic wheels are arranged front and back, each group comprises two short-axis magnetic wheels which are symmetrically arranged on the left side and the right side of the rack, the driving motor is arranged in the rack and connected with the short-axis magnetic wheels, and the two long-axis magnetic wheels are arranged on the front side and the rear side of the rack respectively and connected with the rack through the adjustable connecting frame so that the long-axis magnetic wheels can be matched with pipelines with different curvatures; the double-frequency ultrasonic disintegrating slag cleaning unit is installed on the machine frame through an adjustable clamping mechanism and can be driven to move in the horizontal direction and the depth direction, and the working end of the double-frequency ultrasonic disintegrating slag cleaning unit is made to directly face a pipeline welding seam and stretch into a welding seam groove. The device is not prone to sliding when working, can be matched with pipelines with different curvatures, is reliable and convenient to use and good in cleaning effect, and improves the welding bead cleaning efficiency.

The invention discloses a shaft part surface polishing device and a using method, and belongs to the technical field of machining. Comprising a supporting system, a feeding system and a polishing system, the supporting system is of an adjustable supporting wheel set structure, the feeding system is matched with a gear and rack device through a worm and gear, and the polishing system is matched with an abrasive belt through a planet wheel. The first planetary gear and the second planetary gear rotate around a short shaft at the corresponding mounting position on the planetary frame, and revolve around the axis of the workpiece as the center; the first abrasive belt is wound around the first tensioning wheel and the first belt wheel, and the second abrasive belt is wound around the second tensioning wheel and the second belt wheel. The first abrasive belt and the second abrasive belt are tightly attached to the surface of the workpiece in a staggered mode. The technical problem that in an existing polishing process, a fixed long-shaft workpiece rotating mode is adopted, polishing in a single direction is prone to causing vibration of a workpiece, and the surface quality of the workpiece is reduced is solved.

A torque sensor 10 comprises: a stub shaft 86; a first pinion gear 91 through which torque is transmitted to and from the stub shaft 86 via a torsion bar 95; a sensor body 58 fixed to the first pinion gear 91 or the stub shaft 86; a sensor housing 21 that houses the stub shaft 86 and the sensor body 58; and a bearing 70 that rotatably supports the stub shaft 86 with respect to the sensor housing 21. The stub shaft 86 has a guide part 87 having a diameter that is slightly smaller than the diameter of a portion of the stub shaft 86 where the bearing 70 is disposed. The length L1 in the axial direction from a guide end 87a to an end section 58a of the sensor body 58 on a side where the guide part 87 is located is longer than the length L2 in the axial direction from the bearing 70 to an end section 23 of the sensor housing 21.

The invention discloses a heatable automatic powder stirring encrusting device and system. The equipment comprises a flour bin, a heat preservation shell, a steam heating opening, a stuffing hopper, an auger A, an auger B, an auger shaft fixing plate, a synchronous wheel A, a synchronous wheel B, a synchronous belt, a gear motor, a supporting plate, a driving motor, a pinion, an outer bin transmission gear, a bearing base, a base bearing pressing plate, a supporting column, a side position fixing plate, a telescopic push rod, a motor, a cutter fixing base, a cutter power disc and a cutter disc gear. The device comprises a cutter blade, a cutter movement guide opening, a sensor, a sensor supporting plate, a straight gear, a cutter driving shaft, a switch valve, a sealing gasket, a sealing cover, a bearing, a fixing plate, a positioning short shaft and a cutter lower rotating disc. The device is used for mounting the automatic powder stirring control equipment to realize powder stirring through rotation of the motor and the rotary straight gear.

The utility model discloses a hanging wheel component convenient to assemble, which comprises a wheel seat, a mounting seat and a screw rod, the screw rod is in threaded connection with the wheel seat, a locking space is arranged in the mounting seat, and an elliptical locking hole communicated with the locking space is arranged on the upper surface of the mounting seat; the screw rod is connected with an oval locking plate, and the oval locking plate can penetrate through the oval locking hole to be inserted into the locking space. A positioning hole is formed in the upper surface of the locking space, and the oval locking plate is provided with a positioning column. When the short axis of the oval locking plate coincides with the long axis of the oval locking hole, the positioning column can be inserted into the positioning hole from bottom to top. The locking space is provided with an elastic module, and the elastic module is used for applying upward acting force to the oval locking plate. The device is easy to operate and convenient to disassemble.

A driveline assembly for use with a well-servicing pump system is disclosed. The driveline assembly comprises a stub shaft attachable to one of a pump or a motor, a flange shaft attachable to the other of the pump or the motor, and a coupling assembly comprising a drive-transfer cylinder and a spring-loaded locking sleeve. In a drivingly-engaged position, rotary drive motion of the motor is transferred to the pump. In an unlocked position, the locking sleeve allows the drive-transfer cylinder to move axially from the drivingly-engaged position where the drive-transfer cylinder connects and transfers rotary drive between the flange shaft and the stub shaft to the drivingly-disengaged position where the drive-transfer sleeve disconnects and allows relative rotation between the flange shaft and the stub shaft. In a locked position, the locking sleeve locks the drive-transfer cylinder in one of either the drivingly-engaged position or the drivingly-disengaged position.

Pendulum power transmission drive wheel with mechanical recovery of part of the braking energy, developed from a reducer (3) attached to the vehicle suspension. The drive wheel (1) is fixed to the slow shaft (4) of the reducer (3). On the fast shaft (5) on its stub axle, a bearing (7) is fixed from which a swing arm (6) hangs, at the end of which the engine (8) is fixed, which drives the fast shaft (5) by means of a belt transmission (11), chain or gears, forming a pendulum assembly (19). On the arm (6) brake calipers (14) are mounted which, when activated on the disc (13), keep the pendulum assembly (19) raised, by the effect of the engine brake (8), accumulating potential energy. To move the vehicle, the calipers (14) are deactivated and the engine (8) is started simultaneously, recovering part of the braking energy on its descent and facilitating the starting of the engine (8) and the vehicle.

A rear axle of a commercial electric vehicle includes a curved de Dion axle that includes stub axles, CV cups, each configured to receive a portion of a CV axle, and a central portion disposed downward and rearward of the stub axles. The rear axle includes a curved form factor to allow for a portion of an electric drive unit to be disposed in a manner where a hub centerline connecting the stub axles intersects the electric drive unit.

A hub removal device for removing a hub assembly for a wheel of a vehicle away from a steering knuckle includes a puller plate which may be coupled to studs of the hub assembly and an actuating rod which is operable to threadedly engage the puller plate and push against a stub axle. A method of removing such a hub assembly using the device is also disclosed. The actuating rod may be rotated to advance the actuating rod through the puller plate and against the stub axle, which is attached to the steering knuckle. The puller plate pulls on the studs of the hub assembly, and the rotating rod pushes against the stub axle, resulting in removal of the hub assembly from the steering knuckle.

A swing arm assembly for a foldable wheelchair consisting of a camber tube and adapters is disclosed. The adapters mount to the frame of the wheelchair and receive the ends of the camber tube. Each end of the camber tube is pinned into an adapter using a quick release pin. The camber tube improves the stability of the foldable wheelchair. When desired to fold the wheelchair, the quick release pin is removed and the camber tube is removed, thereby allowing the wheelchair to fold. The adapters may be mounted to the wheelchair frame or to stub axles if used. The swing arm assembly adds substantial stiffness and stability to a folding wheelchair.

To provide a propeller shaft equipped with a protective boot that can select both an air vent function and a waterproof function.SOLUTION: An annular groove recessed in a radial direction is formed on an inner peripheral surface of a protective boot where a boot fastening part comes into contact with a stub shaft, and an external communication groove communicating from the annular groove to an outside of the protective boot and an internal communication groove communicating from the annular groove to an inside of the protective boot are further formed on the inner peripheral surface, and when used as the protective boot with an air vent function, the stub shaft with a flat outer peripheral surface is fitted into the boot fastening part of the protective boot so that the internal communication groove, the annular groove, and an external communication passage are connected, and when used as the protective boot with a waterproof function, the stub shaft with an annular protrusion formed on an outer peripheral surface so as to match the annular groove is fitted into the boot fastening part of the protective boot so that the annular groove closes the annular protrusion.SELECTED DRAWING: Figure 2

A mistake proofing device for a short shaft of a pin shaft relates to the technical field of chain manufacturing and comprises a bottom plate and a supporting seat, the supporting seat is arranged at the upper end of the bottom plate, a sliding hole is formed in the top of the supporting seat in a penetrating mode in the front-back direction, a sliding block is connected in the sliding hole in a sliding mode, and a through material passing hole is formed in the sliding block in the front-back direction. The material passing hole is used for allowing a shaft material to penetrate through and is in clearance fit with the shaft material, the outer wall of the sliding block is connected with the inner wall of the sliding hole through a spring, a detection probe is installed on the inner wall of the rear end of the sliding hole, and the detection probe is in signal connection with a control system of the shaft cutting machine through a wire. And the detection probe is opposite to the shaft material penetrating through the sliding block. The pin shaft cutting machine is simple in structure and convenient to use, the problem that the pin shaft cutting machine produces short pin shafts due to bending of shaft materials can be effectively solved, the production quality of the pin shafts is guaranteed, and errors of subsequent assembly procedures are avoided.

The utility model relates to the technical field of compressor assembly, in particular to a rotary vane compressor pre-assembling rear bearing tool which comprises a bottom plate, a pre-assembling measuring table and a positioning block, and the pre-assembling measuring table and the positioning block are assembled on the bottom plate. The pre-assembly testing table is vertically arranged on the bottom plate and comprises a base body, a first shaft body and a second shaft body which are connected with one another in the axial direction, the base body is provided with an assembly surface for bearing a cylinder body, the shaft diameter of the first shaft body is matched with the short shaft distance of a cylinder body assembly hole, and the rear bearing is assembled on the other end face, deviating from the assembly surface, of the cylinder body; the shaft diameter of the second shaft body is matched with the hole diameter of an assembly hole of the rear bearing; the outer axial surface of the base body is concave inwards to form a positioning groove, the positioning block is movably arranged in the horizontal direction, and one end of the positioning block is clamped in the positioning groove; the horizontal position of the positioning block is adjusted through the matching relation between the positioning block and the positioning groove in the pre-assembling testing table, the pre-assembling testing table and the cylinder body on the pre-assembling testing table are driven to deflect by a small angle, the coaxiality fine adjustment effect between the cylinder body and the rear bearing is rapidly achieved, the adjusting time is shortened, and the assembling efficiency is improved.

The invention discloses a crankshaft deburring device, and relates to the technical field of crankshaft deburring, the crankshaft deburring device comprises a frame, slideways are arranged on two sides of the upper end of the frame, a driving head is slidably mounted on the slideways, the driving head comprises a horizontal driving motor and a crankshaft clamping motor, and an automatic eccentric mechanism is coaxially and fixedly mounted on one side of the crankshaft clamping motor through a rotating shaft; the horizontal driving motor is slidably installed above the sliding way, a machine head is arranged at the upper end of the frame through an adjusting mechanism, and a grinding block is coaxially and fixedly installed at the tail end of the machine head through an output shaft. A servo numerical control technology is adopted, the direction of a product can be accurately positioned, the middle lower end of a long shaft can be automatically clamped by matching with a tool clamp, and after the long shaft finishes concentric circle brushing deburring, a clamp moving block can quickly and automatically adjust the eccentricity of a corresponding model, so that a short shaft realizes concentric circle rotating and then deburring; burrs of a long shaft and a short shaft of a product can be removed at the same time in the single-time clamping process, and the risks of secondary clamping and missing machining are effectively avoided.

The invention discloses an intelligent device for cement mortar shrinkage performance and a test method, the intelligent device comprises a shell, and further comprises a compression ring assembly used for preventing hollowing of a cement block, the compression ring assembly comprises a cylinder, push rings, a push rod and an eccentric wheel, the push rings are movably connected to the two ends of the cylinder, and the eccentric wheel is movably connected to the push rod; the two push rings are hinged to push rods through hinged supports on the push rings, the other ends of the two push rods are rotationally connected with the push rods through guide rods at the eccentric positions of eccentric wheels, the two eccentric wheels are rotationally connected to the two sides of a shell through short shafts at the axes of the eccentric wheels, the shell is connected with a limiting assembly, and the top end of the shell is connected with a clamping assembly. According to the invention, hollowing in the cement block can be effectively prevented when the cement block is manufactured.

Disclosed herein is an axle cartridge member for receiving a pair of torsion stub axles. The axle cartridge member includes a pair of laterally opposed bases, with each base defining a cavity therein for receiving an elongated stub housing of the torsion stub axles. The axle cartridge member also includes a pair of axle mounts that each includes a lateral opening extending into the cavity defined in the respective base, and an arch including a crossbar extending at a height above the bases wherein the arch further includes a portion that extends upward from each of the bases at an angle and meets the crossbar that extends generally horizontally between the portions of the arch.

The invention discloses a central channel interior trim assembly and an automobile, and belongs to the technical field of automobile accessories, the central channel interior trim assembly comprises an armrest box, the other side of the armrest box is fixedly provided with a placing frame, the top of the armrest box is provided with a groove, and limiting telescopic rods are fixedly installed at the positions, close to the periphery, of the bottom of an inner cavity of the groove; the top ends of the limiting telescopic rods are jointly and fixedly provided with an adjusting plate, a lifting assembly is arranged at the bottom of the adjusting plate, a cavity is formed in the armrest box and located in the periphery of the groove, and an impurity removing assembly is arranged at the position, close to the other side, of the bottom of an inner cavity of the groove. According to the technical scheme, two round rods can rotate under rotation of a worm wheel, then a swing plate fixed to the round rods can swing, an adjusting plate can move upwards under limiting of a plurality of limiting telescopic rods under matched use of a short shaft and the swing rod, a car owner can conveniently take out objects located on the bottom layer, and the efficiency of taking out the objects on the bottom layer is improved.

A process for orbital friction welding of a blade to a stub on a turbomachine rotor disk, comprising the following successive phases: friction of the blade against the stub with application of a force friction normal; forging of the blade against the stub with application of a normal forging force; wherein the normal forging force is greater than the normal friction force and essentially constant throughout the forging phase.

A brake caliper (16) for a disc brake (17), comprising a caliper body (18) adapted to be integrally connected to a stub axle of a vehicle, said caliper (16) comprising a first pad (19) and an opposite second pad (29) connected to the caliper body (18), wherein the first pad (19) and the second pad (29) are mutually spaced apart and delimit a disc space to accommodate a brake disc, wherein the caliper (16) comprises an electric motor and an actuating device (20), wherein the actuating device (20) is connected to the electric motor and is configured to transmit mechanical power generated by the electric motor to at least the first pad (19), wherein the actuating device (20) extends along an actuation axis (21) substantially transverse to the first pad (19), wherein the actuating device (20) comprises a thrust head (22) operatively connected to a thrust shaft (23), wherein the thrust head (22) faces the first pad (19) and is translationally actuatable to abut against the first pad (19), along the actuation axis (21), to apply a clamping force to the first pad (19), wherein the thrust shaft (23) is positioned opposite to the first pad (19) with respect to the thrust head (22), and is translationally actuatable along the actuation axis (21), wherein the actuating device (20) comprises a bearing (1) comprising a plurality of rolling elements (2) contained in a cage (3), wherein the cage (3) extends on an extension plane (4) substantially transverse to the actuation axis (21 ), wherein the bearing (1) is adapted to support loads directed in a direction parallel to the actuation axis (21), and wherein each rolling element (2) is rotatable about a respective rotation axis (6) parallel to the extension plane (4).

A carder has a drum formed as a hollow cylinder having a drum wall, a longitudinal axis, a circumference, an outer surface, a length, and a clothing provided on the outer surface. Working elements are arranged relative to the outer surface of the drum. Stub axles or a continuous axle is formed along the longitudinal axis of the drum and connected to the drum wall by spokes or disks. One or more acceleration sensors that measures structure-borne sound are mounted on one or more of: a side of the drum wall facing the longitudinal axis, the stub axles, the continuous axle, the spoked, or the disks within the length of the drum.

The present application provides a kind of shearer rocker arm clutch mechanism, including movable be arranged between the shaft gear of cutting motor and drum transmission mechanism Torque shaft, connect with the end of Torque shaft far from shaft gear to drive Torque shaft movement realizes the short shaft of clutch operation, installation seat is installed on cutting motor and is penetrated by short shaft, handle is arranged in the accommodation space of installation seat and is fixedly connected with the end of short shaft, still include: the long shaft of being set through short shaft and being opposite with the end surface of Torque shaft, long shaft is movably arranged relative to short shaft, and the end of long shaft towards Torque shaft is provided with the shaft head for being matched with the connecting groove of the end surface of Torque shaft, by moving long shaft, make shaft head embed connecting groove, to rotate the other end of long shaft drive Torque shaft synchronous rotation to specified angle position by another end of long shaft.The present application is rotated manually Torque shaft, makes Torque shaft and shaft gear realize spline alignment, to easily complete " the " operation, without disk movement drum or start cutting motor.

The application provides a kind of ignition compression gasoline engine piston and engine, the ignition compression gasoline engine piston includes: piston body, the top surface of the piston body is provided with pit, first intake valve avoidance pit, second intake valve avoidance pit, first exhaust valve avoidance pit and second exhaust valve avoidance pit;Wherein, the center of the pit is offset to the back along the first direction relative to the center of the piston body, the first direction is the front-back direction of engine, the first intake valve avoidance pit, second intake valve avoidance pit, first exhaust valve avoidance pit and second exhaust valve avoidance pit are sequentially arranged along the circumference of the pit;The long axis of the pit is in the first direction and perpendicular to the direction of intake and exhaust, and the short axis of the pit is in the direction of intake and exhaust.

The utility model relates to the technical field of automobile part production and processing, and particularly discloses an automobile part testing fixture, which is characterized in that a turntable is rotationally arranged on the front side of the middle part of the top surface of a bottom cabinet; the multiple clamps are installed on the top face of the rotary disc in a sliding mode in the radial direction. One end of the arc-shaped rail is vertically fixed on the rear side of the middle of the top surface of the bottom cabinet; the moving seat is movably sleeved on the arc-shaped rail; the bottom end of the telescopic cylinder piston cylinder is fixed to one side of the movable base, and the telescopic cylinder extends in the radial direction of the arc-shaped rail. The middle of the top face of the clamping base is fixed to the bottom end of a telescopic cylinder piston rod. The rotary detection assembly comprises a cylinder, short shafts which are fixed to the centers of the two side walls of the cylinder and are rotatably sleeved and matched with the bottoms of the two sides of the clamping seat, and a plurality of detection rods which are installed in the middle of the peripheral wall of the cylinder in the radial direction. The third servo motor is fixed to one side of the clamping base, and a power output shaft of the third servo motor is fixedly connected with the corresponding short shaft in a butt joint mode. The problems of poor universality and low detection efficiency of an automobile part through hole detection tool are well solved.

The utility model relates to the technical field of inspection machine equipment, and discloses a track cleaning device which comprises a suspension, a driving shaft is rotatably arranged on the suspension, an eccentric wheel is fixedly arranged on the driving shaft, the outer edge of the eccentric wheel is sleeved and rotatably matched with a hoop, and the hoop is fixedly connected with a support arm; a cantilever is further rotationally arranged on the suspension frame, a brush head is arranged at one end of the cantilever, bristles are arranged on the brush head, and the brush head is perpendicular to the cantilever; a connecting plate is fixedly connected to the other end of the cantilever, a short shaft is fixedly connected to the connecting plate, the short shaft and the cantilever are connected to the two ends of the connecting plate respectively, and the axis of the short shaft and the axis of the cantilever are parallel and staggered; a limiting hole is formed in the end, away from the hoop, of the supporting arm, the short shaft penetrates into the limiting hole, and a gap is formed between the outer surface of the short shaft and the hole wall of the limiting hole. The cleaning device can solve the problem that when an existing cleaning device works, the brush head is in a static state relative to the whole device and can only move along a straight line for cleaning, and the cleaning effect is not good.

The utility model provides a kind of split type pivot locking structure applied to exercise bicycle, including the sleeve seat embedded in frame, the short shaft of detachable connection with sleeve seat, the connecting piece of pivot sleeve in short shaft, the shake hand pipe of detachable fixed in connecting piece and the linkage of pivot connection foot and connecting piece.Sleeve seat and short shaft are detachably connected by thread structure, and connecting piece contains slidable fixed section and telescopic section.The utility model realizes the shake hand pipe and frame split design, reduces packing material accumulation and reduces storage and transportation cost, simplifies assembly process, and connection is stable and not easy to loosen, movement linkage is smooth, improves use safety and experience.

A vehicle PTO drive line system has an output shaft (20) with a socket (21) to drivingly receive a removable PTO stub shaft (16). The stub shaft is retained in the socket by a retention disc (23) mounted about the stub shaft. The retention disc (23) is rotationally driven by the output shaft and is operative to axially locate the stub shaft within the socket in an operative position. The retention disc (23) is held in the operative position by a fastener (32) detachably mounted on the output shaft. The retention disc (23) cooperates with a sensor (25, FIG. 3) to generate a signal indicative of a rated speed of the stub shaft. The system may comprise several PTO stub shafts (16, 16') interchangeable mountable to the output shaft, each designed to be used at a different rated speed. Each stub shaft (16, 16') is mounted using a corresponding retention disc (23, 23') configured to generate a signal indicative of the rated speed of the stub shaft.

The utility model discloses a mould core-pulling mechanism based on cam, it belongs to mould field, it includes the pivot, is provided with eccentric cam on the pivot, eccentric cam rotatablely set up in the guide hole of long axle and short axle on slider, when the pivot rotates, the working profile surface of eccentric cam periodically promotes two opposite side wall surface of short axle direction, is provided with the core on the slider, and the core is along the short axle direction of guide hole setting. The utility model discloses a mould core-pulling mechanism based on cam can improve the core-pulling precision, and reduce the phenomenon of hole wall scratch.

The application discloses a crankshaft structure, a pump body assembly and a compressor. The crankshaft structure comprises a long shaft part, an eccentric part and a short shaft part which are connected in sequence in the axial direction. The long shaft part comprises a long shaft matching section and a long shaft oil outlet section which are coaxially arranged. The long shaft oil outlet section is arranged close to one end of the eccentric part, and the diameter of the long shaft oil outlet section is larger than that of the long shaft matching section. The short shaft part comprises a short shaft matching section and a short shaft oil outlet section which are coaxially arranged. The short shaft oil outlet section is arranged close to one end of the eccentric part, and the diameter of the short shaft oil outlet section is larger than that of the short shaft matching section. The long shaft oil outlet section and the short shaft oil outlet section are arranged, so that the root strength of the long shaft part close to the eccentric part and the root strength of the short shaft part close to the eccentric part are effectively increased, the bending resistance, the torsional strength and the rigidity of the crankshaft are improved, and the occurrence of the sweep bore failure in the process of starting and frequency increasing of the compressor is avoided. Meanwhile, the noise of the compressor is greatly reduced, and the working performance and the reliability of the compressor are ensured.

The utility model relates to rolling mill equipment technical field discloses a kind of joint shaft bracket and short stress line rolling mill, the joint shaft bracket includes bracket body, bearing seat and backing plate;Bearing seat is installed in bracket body, the connecting place of bracket body is equipped with the installation slot extending along the arrangement direction of joint shaft, installation slot is along the direction of being perpendicular to the arrangement direction of joint shaft and being perpendicular to the axis direction of joint shaft and penetrates, two side surfaces in installation slot form mounting surface, the connecting end part of bearing seat is inserted into installation slot and is connected with mounting surface;The side of mounting surface towards connecting end part is equipped with backing plate, backing plate includes gasket between mounting surface and connecting end part, fixed plate connected with gasket, fixed plate is located outside installation slot, and from the side of gasket towards the side of deviating from connecting end part, fixed plate is adjustably located in bracket body along the direction perpendicular to mounting surface.The backing plate in the joint shaft bracket can adjust position, effectively prolong service period, and disassembly and assembly are convenient, effectively improve replacement efficiency.

A wheel end assembly (142, 144) of a vehicle is disclosed, comprising a constant velocity joint (CVJ) with an outer race (238) having a bore (348) with an internally splined interface configured to mesh with an externally splined interface of a stub shaft (218) secured to a wheel hub of the wheel end assembly (142, 144). The stub shaft (218) is a removable component manufactured separately from the outer race (238) of the CVJ. As a result, the size of the outer race (238) can be reduced compared to CVJs having outer races with integrated shafts. In this way, the presented system enables the manufacture of a wheel assembly comprised of parts that do not exceed size or length thresholds where manufacturing might be complicated or undesirable.