75results about How to "Improve radial load capacity" patented technology

The invention relates to a shaft valve flow distribution cycloid hydraulic motor and belongs to the technical field of hydraulic transmission detection. The motor comprises a front cover and a body shell which are connected with each other, and a cycloid pin wheel pair composed of a stator and a rotor, wherein one end of the cycloid pin wheel pair is fixedly connected with the body shell by a separation disc and the other end of the cycloid pin wheel pair is fixedly connected with a rear cover; the body shell is internally provided with an output shaft extended by the outer end; the output shaft is in transmission connection with the rotor by a linking shaft. The improvement is as follows: an inner hole of the body shell is a through hole with the same inner diameter; a front needle bearing and a rear needle bearing which have the same outer diameter are arranged on the front part and the rear end of the output shaft respectively; the length of the front needle bearing is longer than that of the rear needle bearing; a shaft shoulder, which corresponds to the front end of the front needle bearing, of the output shaft is abutted against a rear retainer ring of a plane thrust bearing. According to the shaft valve flow distribution cycloid hydraulic motor, under the precondition of keeping a compact structure, the radial bearing capability of the hydraulic motor is improved, the axial bearing capability is also enhanced and the machining and assembling manufacturability is good.

The invention discloses an electric spindle supported by a multivariant bearing. The electric spindle comprises a shell, a rotary axle, a stator and a rotator, wherein the rotary axle is arranged in the shell, and the stator and the rotator are internally provided with a motor. The front end of the rotary axle is arranged at the external part of the shell and is adjacent to the front cover of the shell. An oil inlet for supplying pressure oil to the rotary axle is arranged in the front cover of the shell. A rear-supporting bearing is connected at the tail end of the rotary axle in the shell. The electric spindle supported by the multivariant bearing has the beneficial effects that two angular contact ball bearings of the rear bearing are used as the rear end radical supporting of the rotary axle and the axial supporting of the rotary axle to play the functions of being convenience in maintaining and repairing and being capable of bearing dual-directional axial load of the rolling bearing. By supplying pressure oil through the oil inlet, an oil membrane dynamic and static pressure bearing is formed between the front cover and the rotary axle. As the dynamic and static pressure oil membrane bearing has a larger axial bearing capacity and a longer server life than the rolling bearing, the bearing capacity of the output end of the electric spindle can be improved, and a longer service life of the electric spindle can be maintained under a larger external load.

The invention discloses an air flotation main shaft and a machine tool. The air flotation main shaft comprises a body, a central spindle, an aerostatic bearing and an aerodynamic bearing, wherein thebody is provided with a shaft hole and an airflow channel; the central spindle is arranged in the shaft hole in a penetrating mode and is provided with a thrust flying disk; the aerostatic bearing comprises a first aerostatic bearing, a second aerostatic bearing and a thrust bearing, the first aerostatic bearing and the second aerostatic bearing are both arranged in the shaft hole and both matchedwith an outer circle bearing surface of the central spindle, the thrust bearing is matched with the thrust flying disk, and the first aerostatic bearing, the second aerostatic bearing and the thrustbearing are respectively provided with air inlet holes which communicate with the airflow channel; and the aerodynamic bearing is arranged in the shaft hole, located between the first aerodynamic bearing and the second aerodynamic bearing and matched with the outer circle bearing surface of the central spindle. By using the aerodynamic bearing and the aerostatic bearing simultaneously, it can be guaranteed that the radial carrying capacity of the main shaft is enhanced while the main shaft maintains high speed, so that product performance is improved, and machining difficulty is lowered.

The invention provides an axial permanent-magnet bias hybrid magnetic bearing switch reluctance motor which comprises a torque stator, a torque rotor, a suspension force stator, a magnetic disc, a suspension force rotor, a permanent magnet, a non-magnetic stator, a non-magnetic rotor and windings, wherein the torque stator, the suspension force stator and the non-magnetic stator are axially superposed to form a whole; the non-magnetic stator is arranged between the torque stator and the suspension force stator; one winding is wound on each tooth combined by the three stators; the permanent magnet is placed between the suspension force stator and the magnetic disc, and axially magnetizes; the torque rotor, the suspension force rotor and the non-magnetic rotor are axially superposed together; the magnetic disc is in a disc structure or a salient pole structure same as the suspension force stator; the suspension force rotor is in a cylindrical structure; the number of teeth of the torque stator, the suspension force stator and the non-magnetic stator is twelve; pole arcs are equal; the number of teeth of the torque rotor and the non-magnetic rotor is eight; and pole arcs are equal. According to the motor, only the permanent magnet provides bias magnetic flux, and the motor is great in radial bearing capacity, few in power switching tube and low in control circuit cost.

The invention relates to a cycloid hydraulic motor output shaft and a machining method thereof, which belongs to the technical field of mechanical transmission. The main body of the output shaft comprises an large-diameter section located in a cycloid hydraulic motor casing and a small-diameter section extending out of the casing after being assembled; a structure which is in transmission with and meshed with a hydraulic motor linkage shaft is arranged in an inner hole of the large-diameter section; a movable matching part for the inner hole of the casing is arranged on the surface of the external circumference of the large-diameter section; the movable matching part is provided with two or more sections of circumferential discontinuous oil grooves; the groove bottom of each discontinuous oil groove comprises eccentric arc sections of which centers of circle deviate a process eccentricity,and the center of the excircle of the movable matching part deviates a process eccentricity; the radius of each eccentric arc section is greater than that of the excircle of the movable matching part. By adopting the machining method, not only are improvement on working efficiency and reduction of manufacturing cost remarkably facilitated, but also an oil film is better formed, radial force bearing capacity is enhanced, and lubrication and sealing are ensured.

The invention discloses a self-aligning roller bearing split-type retainer and a design method thereof. The outer diameter of the retainer is increased based on a current double-claw integral solid retainer, so that the outer diameter dimension Dc of the retainer is bigger than the inner diameter dimension of an outer ring; the middle part of the retainer is split into a left half part and a right half part from the middle part, and then split into two halves from the centre of a pocket hole along the axial direction of the left half part and the right half part of the retainer; the right half part of the retainer is rotated by 90 degrees clockwise or clockwise to stagger the axial split part, so that the centre of a beam on the right half part of the retainer is aligned to the centre of the pocket hole on the right half part of the retainer, and drilled with a connecting hole in a matched manner; four parts respectively formed in the radial direction and the axial direction of the retainer are placed between the inner ring and the outer ring of the bearing, and then rotate out with the inner ring from an outer ring roller, and finally are connected together by a plurality of inner hexagonal bolts and spring pins to form an integer. The retainer has high strength and high reliability, so that the bearing has high carrying capacity in the axial direction and the radial direction, and operating stability.

The invention provides a combined type rubber metal joint bearing and method. The metal joint bearing comprises a joint inner ring and a joint outer ring. A core shaft is embedded into the joint inner ring. The joint outer ring is sleeved with a rubber bushing. The joint outer ring abuts against an inner sleeve of the rubber bushing. A rubber check ring is embedded between the core shaft and the inner sleeve in a sleeved manner. An inner check ring of the rubber check ring abuts against the core shaft. An outer check ring of the rubber check ring abuts against the inner sleeve of the rubber bushing. According to the joint bearing, the joint outer ring is sleeved with the rubber bushing, and with the rubber bushing, the radial bearing ability and the radial buffering performance of the metal joint bearing are improved. The rubber check ring is embedded between the core shaft and the rubber bushing, the rubber check ring can generate damping force to stop deflection of the core shaft when the core shaft deflects, and thus vibration and noise generated in the deflection process of the core shaft can be reduced substantially.

An eccentric pin structure comprises a connecting rod and a connecting fork. The connecting rod is connected with the connecting fork through an eccentric connecting mechanism, a pin hole is formed inthe connecting rod, a pin fixing hole and a pin cover fixing hole are oppositely formed in the connecting fork, the eccentric connecting mechanism comprises an eccentric pin and an eccentric pin cover, a second locking hole is formed in the side of the pin cover fixing hole in the connecting fork, one end of the eccentric pin cover is matched with the second locking hole in a limited manner, theother end of the eccentric pin cover is matched with the pin cover fixing hole in an inserted manner, a first locking hole is formed in the side of the pin fixing hole in the connecting fork, one endof the eccentric pin is matched with the first locking hole in a limited manner, and the other end of the eccentric pin sequentially penetrates the pin fixing hole and the pin hole and then is fixedlyconnected with the eccentric pin cover through a fixing bolt. The eccentric pin structure is firm in connection, excellent in radial bearing capacity, small in arrangement space and high in adjustment precision.

A core bag structure hobbing cutter, and a use method as well as application thereof are disclosed. The core bag structure hobbing cutter comprises a cutter shaft, a cutter body, a cutter ring and an end cover. A shaft shoulder is arranged at the central position of the cutter shaft; steps are symmetrically arranged on the two sides of the shaft shoulder; the cutter shaft runs through the cutter body; thrust bearings are arranged on the two sides of the shaft shoulder respectively; a cylindrical roller bearing is arranged between the thrust bearings and the steps. According to the core bag structure hobbing cutter, the cylindrical roller bearing and the thrust bearings are adopted to replace the traditional bearings, the radial bearing capability of the hobbing cutter is increased by increasing the number of cylindrical rollers, and the axial bearing capability of the hobbing cutter is increased by virtue of the thrust bearings, so that the bearing capability of the whole hobbing cutter is correspondingly increased, the wear resistance of the hobbing cutter is enhanced, and the service life of the hubbing cutter is prolonged.

The invention relates to a rotary connector. The rotary connector comprises a supporting frame and an adapter, a rotating shaft with the rotating axis extending in the front and back direction is rotationally assembled on the supporting frame through a rotating shaft bearing, the adapter is rotationally assembled on the supporting frame through an adapter bearing, and the adapter is connected with a rotating shaft in a standstill locking manner. The adapter is in rotary fit with the supporting frame through the adapter bearing, the adapter bearing singly bears the radial load or bears the radial load together with the rotating shaft bearing, the adapter is in standstill locking fit with the rotating shaft to transfer torque, and the matching relationship between the rotating shaft and the supporting frame does not need to be changed; and the appropriate adapter bearing is selected according to needs, and is not like the manner in the prior art that the radial load is only borne by the rotating shaft bearing, and the radial bearing capacity of the rotary connector is improved.

The invention provides a liquid lubricating sliding bearing. A bearing gland is provided with a through hole and an inclined through hole, when a pump rotor rotates at a high speed, two circulating lubricating loops can be formed. The device provided by the invention solves the problems of unsatisfactory lubricating effect of a liquid lubricating sliding bearing in a sealless pump motor sealed cavity, poor cooling effect, easy wear and other problems in the prior art, and is mainly used for high-speed shielding pumps.

The invention discloses an intracavity internal feedback throttling liquid static electric spindle. The intracavity internal feedback throttling liquid static electric spindle comprises a machine body, a liquid static bearing and a rotary shaft. The rotary shaft is in rotary fit into the machine body through the liquid static bearing, an even number of throttlers are arranged on the inner wall face of the liquid static bearing, and every two throttlers are oppositely arranged. Each throttler comprises a throttling boss, an oil collecting oil cavity and a working oil cavity. The throttling bosses communicate with oil inflow branches outside the liquid static bearing, the oil collecting oil cavities surround the throttling bosses, the working oil cavities surround the oil collecting oil cavities, the working oil cavities are separated from the oil collecting oil cavities through first oil sealing flanges, and the oil collecting oil cavity of one of every two opposite throttlers communicates with the working oil cavity of the other one of every two opposite throttlers. By means of the intracavity internal feedback throttling liquid static electric spindle, effective throttling, stableperformance and easier machining can be guaranteed, and then the rigidity of the rotary shaft is improved.

The invention relates to a bearing, in particular to a high-speed heavy-duty high-speed rail bearing with a middle ball. The novel high-speed heavy-duty high-speed rail bearing is composed of an outerring with the middle ball, a deep groove ball bearing inner ring, two double-half inner rings and three rows of rolling bodies, wherein a deep groove ball bearing rolling body track is arranged in the middle of the inner circumference of the outer ring, circular roller tracks are respectively arranged on both ends of the deep groove ball bearing rolling body track at an interval, and circular rollers are respectively arranged in the tracks. A deep groove ball bearing structure is arranged in the middle of the inner circumference of the outer ring and between double sections of circular rollers or cylindrical rollers, the advantages of pure rolling friction of two-point contact of ball rolling bodies, high rotating speed and capability of bearing two-way combined load are fully used so asto design a mechanical structure of the middle ball, the scheme that the axial force of a roller contact angle bearing is increased by a double-section tapered roller bearing is replaced, roller deflection and frictional heating which are caused by stress concentration of the small end of a tapered roller can be effectively reduced, and the rotating speed and the rotary accuracy of the bearing areincreased. Because SKF bearing materials verify that the load carried by the rollers is uniformly distributed on the rollers and a raceway contact surface by virtue of the special circular cambered surfaces of the circular rollers, the middle ball is arranged between the double-row circular rollers, so that the radial bearing capacity of the bearing can be greatly increased, and low friction, lowtemperature rise and long service life are realized.

The invention relates to a ball joint coupling, in particular to an assembly method of a ball joint coupling and a ball joint base of the ball joint coupling. The ball joint base comprises a sleeve; the inner peripheral face of the sleeve is a concave spherical face provided with two key grooves; the concave spherical face is further provided with mounting grooves which are used for inserting a positioning ball in the extension direction of the outer end faces of the positioning ball and which penetrate the sleeve in the axial direction; the mounting grooves are in one-to-one correspondence with the key grooves; each mounting groove comprises a groove bottom communicated with the corresponding key groove and sidewalls, the sidewalls arranged on two sides of the groove bottom extend axially along the sleeve and are used for being in contact fit with two outer end faces of the positioning ball so as to insert the same into the mounting grooves, a distance from the groove bottom of the mounting groove to the center of the positioning ball is larger than the radius of the positioning ball and smaller than a distance from the groove bottom of the corresponding key groove to the center of the positioning ball, a distance between the sidewalls of the mounting groove is not smaller than that between the two outer end faces of the positioning ball. By the use of the assembly method of the ball joint coupling and the ball joint base of the ball joint coupling, the problem that the existing ball joint coupling is complex to assemble is solved.