141results about How to "Limited axial movement" patented technology

The invention relates to the field of door manufacture, in particular to a wood board edge two-side grinding device which comprises a work table, a track, a grinding mechanism and a clamping clamp. A multi-point symmetrical clamp is arranged on the multi-point symmetrical clamp, the grinding mechanism is connected onto the track, the track and the face of the work table are arranged at intervals in the circumferential direction, and the track is fixed on the work table. The grinding mechanism comprises grinders, a cylinder, tightening rods and support tables connected onto the track. Opposite grinders on the two grinding faces are connected onto a guide column in a sliding mode, the guide column is fixed on the support table, a support spring is arranged between the two grinders, the cylinder is fixed on the support table, one end of each tightening rod is hinged to the corresponding grinder, and the other end of the tightening rod is hinged to the telescopic rod of the cylinder. The two tightening rods are symmetrical. The grinding device has the advantages of being capable of balancing wood board vibration equally and achieving a good grinding effect due to the fact that the two grinders which are symmetrical grind the symmetrical upper face and lower face of the wood board simultaneously.

The invention relates to an internal fixing device for minimally-invasive percutaneous penetration. The internal fixing device comprises a minimally-invasive holding sleeve and a minimally-invasive pedicle screw. The minimally-invasive holding sleeve is composed of a minimally-invasive casing pipe, a locking sleeve, a sliding groove pin, a locking screw and an anti-rotation pin. The minimally-invasive pedicle screw is composed of a screw cap, a screw body and a pressing washer. A horizontal protrusion of the inner wall of the front end of the minimally-invasive holding sleeve and the anti-rotation pin are matched with a cross-shaped groove of the outer side of the screw cap of the minimally-invasive pedicle screw, so that the multi-direction movement of the screw is limited. Automatic bar pressing can be achieved in an operation through the lengthening design of the screw cap of the minimally-invasive pedicle screw, bar penetrating is simple, the protrusion of the outer side of the minimally-invasive holding sleeve and the elastic design are utilized to lock the screw in the use process, and the screw is reinforced and fixed through the locking screw. The internal fixing device has the advantages that as the unique design of the inner wall of the minimally-invasive holding sleeve is matched with the cross-shaped groove of the outer side of the screw cap of the minimally-invasive pedicle screw, screw holding and dismantling operation is simple, fast and effective; due to the design of the two thin walls of the front end of the holding sleeve, trauma of tissue channels is small; the problems of difficulty of bar penetrating and complexity of locking and pressurizing of the screw cap and the like in the operation can be solved.

The invention provides a belt conveying device for preventing a belt from deviating. The belt conveying device comprises a roller and a rack; a groove is formed in the center of the roller along a peripheral direction; a lug boss corresponding to the groove on the roller is arranged on the belt; and after assembly, the lug boss can be embedded into the groove, so an axial constraint is applied to the belt on the roller. Meanwhile, a flange is arranged at both ends of the roller respectively; the belt is arranged between the two flanges, so the axial movement of the belt on the roller is better restricted, and the purpose of preventing the belt from deviating is achieved. One or more than one groove is formed on the roller, and different numbers of grooves can be designed according to an actual load in order to improve the effect of preventing deviation. Compared with the prior art, the belt conveying device has the advantages that the structure is simple, and the axial movement of the belt on the roller can be well restricted to prevent the belt from deviating.

The invention relates to a threaded hollow revolution type travelling wave ultrasound motor used for adjusting a diaphragm. The diaphragm comprises a diaphragm fixing ring and a diaphragm moving ring provided with a connecting rod, and the threaded hollow revolution type travelling wave ultrasound motor provided by the invention comprises a base, a piezoelectric ceramic piece, a friction material layer, a damping material layer as well as a stator shaft and a rotor shaft which are arranged in a hollow manner along an axis. The threaded hollow revolution type travelling wave ultrasound motor provided by the invention has the advantages that the infliction preliminary pressure is large, the regulation precision is high, the installation is convenient, the structure is simple, the torque output is large, and meanwhile, the threaded hollow revolution type travelling wave ultrasound motor is used for a diaphragm adjusting system. The threaded hollow revolution type travelling wave ultrasound motor provided by the invention is also suitable for a precision optical system which needs high diaphragm adjusting precision.

A hinge-mounted independent suspension omni-directional mobile platform based on McNum wheel comprises a bearing platform, independent suspension mechanisms and chassis wheel-axle mechanisms. The fourgroups of independent suspension mechanisms and the chassis wheel-axle mechanisms are installed at four vertices of the bearing platform, each group of independent suspension mechanisms, and the chassis wheel-axle mechanism comprises an independent suspension mechanism and a chassis wheel-axle mechanism. The independent suspension mechanisms comprise angle codes, shock absorbers, motor fixing plates and hinges. The motor fixing plate is arranged below the bearing platform, and the angle codes are respectively installed on the bearing platform and the motor fixing plates. The two ends of the shock absorber are respectively connected with the bearing platform and the motor fixing plates through the angle codes, and the inner end of the motor fixing plates is connected with the bearing platform through the hinges. The chassis wheel-axle mechanisms are connected with the motor fixing plates. The hinge-mounted independent suspension omni-directional mobile platform has the advantages of simple structure, compact structure, high bearing capacity, good stability and the like. The invention belongs to the technical field of mobile devices based on McNam wheels.

A piston for an internal combustion engine includes a piston crown (2) and a cylindrical side wall (4), an annular piston ring groove (8) being formed in the side wall (4) which accommodates an annular spring (14). The spring (14) includes an annular radially extending portion (16) and first (20) and second (22) projections. The radially extending portion (16) divides the annular groove into two chambers in the axial direction of the piston. The upper chamber closest to the piston crown accommodates an annular compression ring (10). The lower chamber furthest from the piston crown accommodates an annular oil scraper ring (12). The first projection (20) is arranged to contact the upper surface closest to the piston crown of the annular groove (8). The second projection (22) is arranged to contact the inner surface of the oil scraper ring (12) to urge it outwardly. The height of the upper chamber in the axial direction is greater than that of the compression ring (10), whereby in use, the pressure acting on the piston crown will act also on the inner surface of the compression ring (10) and urge it in the outward direction.

The invention relates to a master cylinder, e.g. for the actuation of a clutch or a brake of a motor vehicle, wherein a piston is axially displaceable inside a guide sleeve and the piston has a front recess in which a piston-side end of a piston rod is received. The guide sleeve and the piston rod are sealed from each other by means of a sealing bellows. An intermediate sleeve is located between the guide sleeve and the piston, is actively connected to the guide sleeve and axially fixes the sealing bellows on its piston rod side end.

The invention discloses a bobbin and an assembling method thereof. The bobbin comprises a roller body and stop plates which are arranged at the two ends of the roller body; the roller body is integrally manufactured and formed and comprises a coiled pipe and stop edges which are formed at the two ends of the coiled pipe; an annular groove is formed in the inner side of each stop edge at the corresponding end part of the coiled pipe; a first notch groove is formed in each stop edge; a stop block is arranged at the position, on each annular groove, on the inner side of the corresponding stop edge; a through hole is formed in the intermediate position of each stop plate; a second notch groove is formed in the edge of each through hole; each through hole is formed in the corresponding annular groove in a sleeving manner; each stop block is arranged in the corresponding second notch groove to prevent the corresponding stop plate from rotating. When the bobbin is assembled, the stop edge at one end of the roller body is clamped into the through hole of the corresponding stop plate, one side of each stop edge is clamped into the corresponding second notch groove, each first notch groove in the other side of the corresponding stop edge is clamped at the edge of the corresponding through hole, and the roller body is rotated clockwise until the stop blocks are clamped into the second notch grooves and the through holes are completely formed in the annular grooves in the sleeving manner. The bobbin is detachable and is convenient to transport, so that the transport cost is reduced; the bobbin is assembled easily and quickly, so that the production efficiency can be improved; the quality is more stable because of the integrated roller body of the bobbin.

The invention discloses an electromagnetic expansion valve which comprises a valve body (21), a spiral guide rail device (241), a follow-up component (242), magnetic steel (27), a limiting sleeve (31) and a limiting block (25), wherein the spiral guide rail device (241) is fixed on the top wall of the valve body (21); the follow-up component (242) is arranged on the spiral guide rail device (241); the magnetic steel (27) is installed in the valve body (21); the lower end of the rail of the spiral guide rail device (241) is provided with a lower retainer; the limiting sleeve (31) is fixedly connected with the magnetic steel (27); the limiting sleeve (31) is provided with a pushing component which is used for pushing the follow-up component (242) to move along the rail; the limiting block (25) is fixedly connected to the end part of the spiral guide rail device (241), is positioned in the inner cavity of the limiting sleeve (31), and is mutually matched with the inner side wall of the limiting sleeve (31). The electromagnetic expansion valve disclosed by the invention has the advantages of higher vibration-proof performance, stable flow regulation performance, longer service life and smaller volume.

The present invention provides a rear wheel camber angle detector and a rear camber angle detection device. The rear wheel camber angle detector comprises a base, a sliding support seat which is slidingly connected to the base, a first displacement detection device, a second displacement detection device, a display screen arranged on the base and a data processing unit. The first displacement detection device comprises a first cylinder, a first detection rod which goes through the first cylinder and a first displacement sensor for sensing the displacement of the first detection rod. The second displacement detection device comprises a second cylinder, a second detection rod which goes through the second cylinder and a second displacement sensor for sensing the displacement of the second detection rod. The second detection rod is parallel to the first detection rod. The first displacement sensor and the second displacement sensor are electrically connected to the processing unit respectively. The data processing unit is connected to the display screen.

The invention discloses a multifunctional abdomen wheel capable of providing a resilience force as needed, comprising a wheel, a switch, a rotation assembly, a coil spring and an axle. The switch is arranged on the rotation assembly and capable of moving radially; the abdomen wheel can be switched between an assisted motion mode (providing a resilience force) and a general motion mode (providing no resilience force) by moving the switch; in the assisted motion mode, the rotation assembly and the axle are fixed, the rotation assembly and the wheel are in relative rotation when a body builder pushes the abdomen wheel, and particularly, when he pushes the abdomen wheel forwards, the coil spring is compressed and generates the resilience force when withdrawing, thereby assisting the body builder to complete a stand up action well; in a general motion mode, the rotation assembly and the wheel are fixed and the rotation assembly and the axle are in relative rotation, when the body builder pushes the wheel forwards, the coil spring is not compressed, and cannot generate the resilience force when withdrawing, and accordingly the mode is adaptable to the body builder having good physical quality.

The invention relates to a deep groove ball bearing with a stop ring. The deep groove ball bearing with the stop ring is characterized in that the outer wall of an outer ring is sunken inwards to form a stop groove which is internally provided with the stop ring; the stop ring is an elastic part with an opening; the ratio of the depth of the stop groove to the thickness of the outer ring ranges from 0.2 to 0.3; a holder is arranged between an inner ring and the outer ring and comprises a holder body and a plurality of holding holes penetrating the holder body in the thickness direction; and a plurality of grooves are evenly formed in the holding holes and are filled with lubricating grease. According to the deep groove ball bearing with the stop ring, the outer wall of the outer ring is sunken inwards to form the stop groove which is internally provided with the stop ring, the stop ring can lock a bearing body in the axial direction and can limit the axial movement in two directions, and the bearing body is prevented from deviating.

The invention discloses an expansion-braking type free-hub assembly of a bicycle. The expansion-braking type free-hub assembly of the bicycle is characterized by comprising a free hub, a plurality ofbrake shoes, a hub shaft, a linkage mechanism, an outer cover plate and a reset piece. The outer cover plate is used for limiting the braking shoes and the linkage mechanism in an integrated free hub,the overall size is reduced, the structure is more compact, the weight is reduced, and the assembly is convenient to disassemble. At the time of braking, the braking shoes expand under the effect ofthe linkage mechanism so as to brake the integrated free hub, the phenomenon that original free hubs are arranged separately and thus easily loosens and slips is reduced, and the braking effect is greatly improved.

The invention discloses a detachable buckling-restrained reinforcing device for a power transmission tower. The detachable buckling-restrained reinforcing device is mainly composed of three parts, andcomprises reinforcing steel plates, hoops and high-strength bolts, wherein the reinforcing steel plates are arranged on the outer side of an original main material, the axial direction of the reinforcing steel plates is consistent with that of the original main material, a plurality of hoops are sequentially distributed at equal intervals in the axial direction of the reinforcing steel plates, and the hoops can be additionally arranged at the weak positions of rod pieces; and the hoops are fixedly connected with the reinforcing steel plates through the high-strength bolts. For a round pipe component, the four reinforcing steel plates are distributed on the upper portion, the lower portion, the left portion and the right portion of the section of the original main material and fixed together through the four identical hoops by means of the high-strength bolts. For an angle steel rod piece, the two reinforcing steel plates are distributed on the outer side of an angle steel flange and fixed together through the two different hoops on the inner side and the outer side by means of the high-strength bolts.

The invention relates to an explosion-proof type well wall diameter measuring device which comprises a pipe shell, a centralizer, a measuring assembly, a telescoping device and a lower connecting rod,wherein the centralizer, the measuring assembly, the telescoping device and the lower connecting rod are arranged in the pipe shell coaxially. The measuring assembly comprises measuring arms with theends passing through the pipe shell and capable of contacting with a well wall to be measured all the time. The upper end of the measuring assembly is connected to a pneumatic cylinder through the telescoping device. A pressure sensor is mounted in the pneumatic cylinder. The lower end of the measuring assembly is fixedly connected with the pipe shell through the lower connecting rod. Aligning iscarried out by the centralizer, and the lateral displacements of the measuring arms are converted into the vertical displacement of a hydraulic cylinder piston by the mutual cooperation of the measuring assembly, the telescoping device and the like, thereby converting the change of the diameter of the well wall into the change of the pressure in the pneumatic cylinder. Signals are transmitted only by the pressure sensor. Because there are less electronic devices and exposed electronic circuit parts, the device has high safety performance in certain working conditions with flammable and explosive gases.

The invention discloses bolt pose detectors and a bolt pose detection tightening device. The bolt pose detection tightening device comprises a plurality of rotating bodies, a plurality of telescopic servo rods, a plurality of bolt pose detectors and a plurality of tightening equipment. The rotating bodies comprise central columns and a plurality of rotating rings, and the rotating rings sleeve thecentral columns and can rotate around the outer circumferential surfaces of the central columns. One ends of the telescopic servo rods are fixed one by one to the outer circumferential surfaces of the rotating rings correspondingly. The bolt pose detectors for detecting and adjusting a bolt pose and the tightening equipment are arranged, the other ends of the partial telescopic servo rods are fixed to the bolt pose detectors one by one correspondingly, and the other ends of the other telescopic servo rods are fixed to the tightening equipment one by one correspondingly. The device can be usedfor detecting, adjusting and tightening multi-position bolts of any disc parts at the same time, and the assembly quality and efficiency are high.

The invention discloses a rotating mechanism of a base for a multifunctional liquid crystal television set. The rotary base mechanism comprises an upper support, a lower support, an upper screw and an adapting support. The upper support is fixed with a liquid crystal display, the lower support is fixed with the base, and the adapting support is arranged between the upper support and the lower support and is rotationally connected with the lower support circumferentially. The upper end face of the adapting support is a first curved surface, the upper support is provided with a second curved surface slidably matched with the first curved surface, the upper screw is fixedly screwed with an axial hole of the adapting support after penetrating through a guide hole of the second curved surface from top to bottom, the upper screw can rotate forwards and backwards by the aid of the guide hole, and the upper support and the adapting support are in forward and backward rotation by forward and backward sliding matching between the second curved surface and the first curved surface and relative movement between the guide hole and the upper screw. The rotating mechanism is capable of rotating leftwards and rightwards and forwards and backwards, so that users can regulate a liquid crystal display screen longitudinally and transversely to realize the optimum viewing angle.

The invention discloses a cleaning machine and a cleaning method for the inner wall of a high-voltage circuit breaker porcelain bottle, the cleaning machine comprises a rotary pushing device and a self-adaptive telescopic wiping plate mechanism for cleaning the inner wall of the porcelain bottle, the rotary pushing device comprises a rack, a sliding sleeve driving mechanism, a threaded sleeve driving mechanism and a grooved screw rod, and the grooved screw rod comprises a screw rod. A guide groove in the axial direction is formed in the periphery of the screw rod. The rack comprises a base plate and a bearing seat, and a first bearing and a second bearing are connected in the bearing seat. The sliding sleeve driving mechanism comprises a sliding sleeve and a first driving motor, the sliding sleeve and a first shaft are put into an inner ring to be connected, a guide key in sliding fit with the guide groove is arranged in the sliding sleeve, the threaded sleeve driving mechanism comprises a threaded sleeve and a second driving motor, the threaded sleeve is connected with an inner ring of the second bearing, the first driving motor drives the sliding sleeve to rotate, and the seconddriving motor drives the threaded sleeve to rotate. The screw rod is connected with the self-adaptive telescopic wiping plate mechanism. The cleaning machine is simple in structure, and the circuit breaker porcelain bottle can be effectively cleaned.

The invention belongs to a locking device, in particular to a combined locking device used for a planetary redactor and a speed changer, aiming to provide an effective locking device for preventing a rotating piece from axially moving, which can be used for not only effectively limiting the axial movement of the rotating piece, but also meeting requirement on compactedness. The combined locking device comprises a locking screw cap, a large locking fluted disc, a large locking clamp ring, a small locking fluted disc and a small locking clamp ring, wherein inner teeth of the large locking fluted disc and outer teeth of the locking screw cap are engaged; the large locking clamp ring is arranged in a slot of a circular tooth gear to press the large locking fluted disc; the rotation of the locking screw cap is limited by the large locking clamp ring and the large locking fluted disc so as to effectively prevent the locking screw cap from loosing; an outer thread of a ball bearing block and an inner thread of an input shaft are matched so as to limit the axial movement of a tool bolt; inner teeth of the small locking fluted disc and outer teeth of the ball bearing block are engaged; and the small locking clamp ring is arranged in a slot of the small locking clamp ring and the locking screw cap so as to limit the rotation of the ball bearing block.

The invention relates to a damping wheel hub of an air inflation-free tire. The damping wheel hub comprises a wheel hub body, wherein the wheel hub body comprises an outer ring and an inner ring in a concentric way; a buffer part is arranged between the outer ring and the inner ring, and a certain gap is reserved between the outer ring and the inner ring. The damping wheel hub has the advantages that when the outer ring suffers from the radial shock, a certain movement space is formed, so that the buffering and damping functions are realized; by arranging the elastic part between the outer ring and the inner ring, the force action time is prolonged, and the damping function is realized.

The invention relates a portable patch cable. One end of a connecting wire is connected with a first connecting head and the other end of the connecting wire is connected with a second connecting head. The connecting wire is wound around a wire spool. A pedestal is provided with a projection and the outer side of the projection is sleeved with a rotating wheel. The inner circumferential surface of the rotating wheel is uniformly provided with a plurality of openings in the circumferential direction. The projection is rotatably and circumferentially provided with a plurality of location locking blocks matching the openings. The location locking blocks rotate unidirectionally. The projection is fixedly provided with a pressure plate used for limiting the axial direction of the rotating wheel. The connecting wire is wound around the wire spool and the first connecting head and the second connecting head are clamped by an upper cover, so that an integrated body is formed. During use, a user can pull out the wire by different lengths as required; after use, the connecting wire can be wound back around the wire spool by rotating the upper cover, so that the operation is simple and the using is convenient; the portable patch cable is convenient to carry or place; twining and knotting of the patch cable are prevented so that great convenience is brought to the user.

The invention provides a pay-off rack. The pay-off rack comprises a supporting rotating shaft arranged in a bobbin in a penetrating manner and left and right supports used for supporting the supporting rotating shaft. The supporting rotating shaft is provided with a stopping pin which is in stopping fit with the left support and / or the right support along the axial direction of the supporting rotating shaft to limit motion of the supporting rotating shaft. The stopping pin is arranged on the supporting rotating shaft, displacement of the supporting rotating shaft in the axial direction of thesupporting rotating shaft can be limited, and the stopping pin is matched with the two supports to enable the supporting rotating shaft to keep in supporting fit with the supports all the time in therotating process. It can be guaranteed that the supporting rotating shaft cannot fall off from the supports, and therefore the production safety is guaranteed.

The invention discloses a floating planetary gear train structure for a miniature precise planetary reducer. The floating planetary gear train structure comprises a planetary carrier, a high-speed sungear, a low-speed sun gear, a planetary gear set and an inner gear ring, wherein the high-speed sun gear is meshed with the planetary gear set, the inner gear ring is meshed with the planetary gear set, the planetary carrier is in a cage type structure, and the planetary gear set is arranged on the cage type planetary carrier in a floating mode to automatically adapt to the central distance and the matching clearance; the floating planetary gear train structure further comprises a gasket, and the two ends of the planetary gear set are correspondingly limited by the cage type planetary carrierand the gasket to limit the axial movement of the planetary gear set. The floating planetary gear train structure for the miniature precise planetary reducer is exquisite and compact in structure, aU-shaped stepped slot and an annular open slot are designed on the cage type planetary carrier, planetary gears are mounted on the U-shaped stepped slot in a rotating floating mode through pin shaftsand needle bearings so as to automatically adapt to the central distance and the matching clearance, so that the loads of all the planetary gears are uniform, the meshing transmission of the sun gear,the planetary gear and the inner gear ring is ensured, the operation is smooth, the noise and the temperature rise are reduced, the problems of blockage or unbalance are solved, and the reliability is high.

The invention discloses an electric lifting table which comprises two lifting stand columns, a driving gear and two clutch devices, wherein each lifting stand column is internally connected with a linear driving mechanism, each linear driving mechanism comprises a lead screw, a transmission nut, an upper limiting piece and a lower limiting piece, and each transmission nut reciprocates between the corresponding upper limiting piece and the corresponding lower limiting piece; the driving gear is in transmission connection with the driving motor; the two clutch devices comprise a first clutch device and a second clutch device which are connected to the two ends of the driving gear respectively, and the outer end of the first clutch device and the outer end of the second clutch device are in transmission connection with the lead screws in the two lifting stand columns respectively; and the clutch devices are used for transmitting the torque of the driving motor under the rated torque and driving the lead screws in the two lifting stand columns to rotate, and the lifting stand columns ascend and descend. The electric lifting table is low in production cost, the lifting operation is not prone to errors, and the defect of control failure caused by program software errors can be effectively overcome.