272results about "Combination bearings" patented technology

The linear guide apparatus includes a guide rail 3 including a rolling body rolling groove 8 and a friction apply unit 6 assembled to the guide rail 3. The friction apply unit 6 includes a unit main body 15, a brake member 16, an oil pressure cylinder 17 and a plate spring 32. The brake member 16 is disposed so as to face the side surface 3a of the guide rail 3 and can be contacted with the other portions of the side surface 3a than the rolling body rolling groove 8 thereof. The oil pressure cylinder 17 includes a piston member 20 which is structured to be driven in a positive direction to thereby press the brake member 16 against the side surface 3a of the guide rail 3 and also the piston member 20 can be driven in the opposite direction to thereby remove the pressure of the brake member 16 from the side surface 3a.

Methods and apparatus for preloading a bearing are provided. The apparatus includes a rod having a first end and a second end adapted to be removably mounted to a shaft; a device for compressing a hub against the outer race of a bearing to provide the preload to the bearing; and a cylindrical frame positioned between the device for compressing the hub and the hub. These methods and apparatus include preload monitoring devices whereby the mechanic can accurately monitor and regulate the preload to a bearing or bearing assembly. Aspects of the invention may also be used to adjust the endplay on a bearing or a bearing assembly. In one aspect, the preload to the bearing is transmitted through a housing having a fluid whose pressure can be detected and monitored. An apparatus for precisely rotating a nut and a tool for precisely rotating a nut are also provided.

An object of the invention is to provide a grease composition capable of keeping a good lubrication condition for a long period of time even when water has mixed therein, thereby inhibiting white structure flaking and corrosion. Another object is to provide a vehicular hub unit bearing which hardly suffers from white structure flaking and corrosion even when used in an environment where water may penetrate into it and which therefore has a long life.The invention provides a rolling bearing with, sealed up therein, a grease composition containing a waterproof film-forming additive added thereto; a grease composition for hub unit bearings, containing a base oil that comprises at least one of mineral oil and synthetic oil as the main ingredient thereof, and a thickener and a flaking inhibitor; and a vehicular hub unit bearing with the grease composition sealed up therein.

The slide assembly includes a first rail, a second rail, a bearing assembly and an engaging member. The first rail includes an opening located adjacent to an end thereof and a stop face is defined on a wall of the opening. The bearing assembly is located between the first and second rails. The bearing assembly has a bearing retainer which has a first contact portion. The engaging member is connected to the second rail and has a second contact portion and an engaging portion. The second contact portion is located corresponding to the first contact portion. When the second rail is pulled relative to the first rail, the bearing retainer is moved by engagement between the first and second contact portions. When the bearing assembly moves to a desired position, the engaging portion is inserted into the opening and contacts the stop face so that the second rail is engaged with the first rail.

A rotary drill bit includes a rotary cutter rotatably mounted on a leg. A radial bearing arrangement and an axial bearing arrangement are provided in an interface between the cutter and the leg. The leg includes a filling opening for enabling cylindrical rolling elements of the radial bearing arrangement to be installed. The cutter includes a radial flange which radially overlaps the radial bearing arrangement to secure the cutter on the leg. The flange, which is disposed axially behind the radial bearing arrangement and axially in front of the filling opening, includes a recess for accommodating the passage of the cylindrical rolling elements. A locking element is disposed in the filling opening for preventing dislodgement of the cylindrical rolling elements. The locking element includes a lip which projects axially forwardly of the radial bearing arrangement. The lip is disposed radially inwardly of the flange and terminates axially behind the radial bearing arrangement.

Methods and apparatus for preloading a bearing are provided. These methods and apparatus include preload monitoring devices whereby the mechanic can accurately monitor and regulate the preload to a bearing or bearing assembly. Aspects of the invention may also be used to adjust the endplay on a bearing or a bearing assembly. In one aspect, the preload to the bearing is transmitted through a housing having a fluid whose pressure can be detected and monitored. An apparatus for precisely rotating a nut and a tool for precisely rotating a nut are also provided.

A gas restrictor particularly usrful for applicatio in gas bearing as used, for example, in free-piston Striling cycle machinery. Porous strip material together with a backing plate and orifice (bleed hole) is used to provide the restriction to the flow of gas into an annular gap between a piston and a cylinder.

A dynamic bushing and / or gripper mechanism comprises an apparatus for retaining a tubular member in a position during processing so that the tube does not move transverse to the longitudinal axis of the bushing, but wherein the tube may be rotated within the confines of the bushing and / or in the case of the gripper mechanism the tube may be moved longitudinally within the confines of the gripper.

The present invention provides a new composite material comprising a porous matrix made of metal, metal alloy or semiconducting material and hollow fullerene-like nanoparticles of a metal chalcogenide compound or mixture of such compounds. The composite material is characterized by having a porosity between about 10% and about 40%. The amount of the hallow nanoparticles in the composite material is 1-20 wt. %.

The linear guide apparatus includes a guide rail 3 including a rolling body rolling groove 8 and a friction apply unit 6 assembled to the guide rail 3. The friction apply unit 6 includes a unit main body 15, a brake member 16, an oil pressure cylinder 17 and a plate spring 32. The brake member 16 is disposed so as to face the side surface 3a of the guide rail 3 and can be contacted with the other portions of the side surface 3a than the rolling body rolling groove 8 thereof. The oil pressure cylinder 17 includes a piston member 20 which is structured to be driven in a positive direction to thereby press the brake member 16 against the side surface 3a of the guide rail 3 and also the piston member 20 can be driven in the opposite direction to thereby remove the pressure of the brake member 16 from the side surface 3a.

There is provided a linear guide apparatus which, owing to the use of a gap-free braking device in a rolling guide, has a sufficiently high damping capacity. The linear guide apparatus for guiding a linear motion of a movable body along a guide rail on a fixed structure in a machine tool, includes: a rolling guide section including a rolling element for rolling on a rolling element-rolling surface of the guide rail; and a brake section for enhancing the damping capacity of the rolling guide section, the brake section including a pair of brake shoes, having a flexible structure, for sliding on the rolling element-rolling surface of the guide rail.

A seismic isolation bearing assembly includes a frame unit including upper and lower frames and defining a plurality of upper and lower sub-frames, and a plurality of bearing units, each of which is mounted in a mounting cell defined by a respective one of the upper sub-frames and a respective one of the lower sub-frames, and each of which includes spaced apart upper and lower load plates and a bearing interposed between and in sliding contact with the upper and lower load plates. The upper load plate is secured to the respective one of the upper sub-frames. The lower load plate is secured to the respective one of the lower sub-frames.

The present invention relates to a synthetic resin bearing for a photovoltaic tracking system including first and second bearing members coupled with each other for forming a bearing assembly, wherein each of the first and second bearing members comprises a pair of side plate members facing each other; a friction member positioned between outer peripheral portions of the pair of side plates and having an arc-shaped section; and a reinforcement member for connecting the pair of side plates and the friction member, and the first and second bearing members have a coupling protrusion and a concave portion for receiving the coupling protrusion at the coupling surfaces thereof.

The present disclosure relates to bearings, guide sleeves and head restraint assemblies for automobiles.

An automatic-positioning linear guide has a driven body combined with guiding rails at two sides of a stationary base via a plurality of rollers. Each of the rollers is composed of two bearings combined by an axial shaft and can be assembled with the corresponding guiding rail without an assembly error therebetween.

A railroad car energy absorption apparatus is disclosed. The railroad car energy absorption apparatus includes a spring assembly having an elastomer spring element arranged in operable combination with structure for inhibiting localized heat deterioration of the elastomer spring element.

The slide assembly includes a first rail, a second rail, a bearing assembly and an engaging member. The first rail includes an opening located adjacent to an end thereof and a stop face is defined on a wall of the opening. The bearing assembly is located between the first and second rails. The bearing assembly has a bearing retainer which has a first contact portion. The engaging member is connected to the second rail and has a second contact portion and an engaging portion. The second contact portion is located corresponding to the first contact portion. When the second rail is pulled relative to the first rail, the bearing retainer is moved by engagement between the first and second contact portions. When the bearing assembly moves to a desired position, the engaging portion is inserted into the opening and contacts the stop face so that the second rail is engaged with the first rail.

A guide to support a shaft such as a pump pull rod (11) which is capable of both rotary and reciprocal motion. The guide prevents any misalignment of rod (11) damaging a seal, e.g. a stuffing box, held in space (24). Guide element (18) has central portion (19) and annular flange (25). Element (18) can move laterally with respect to housing (12) and can also pivot, along with the cap (15) of the housing (12), with respect to the lower portion (14) thereof. The latter is achieved via movements of part-spherical bearing element (28) and similarly shaped faces (26, 37, 38) of housing 9120. Further seals (33, 34) prevents entry of pumped fluid into chamber (13).

A slide mechanism includes first and second rails connected for relative sliding movement with respect to each other. A damper mechanism is secured to one of the rails and can be connected to and disconnected from the other of the rails to provide a damping effect for relative movement of the rails during at least a part of the movement thereof.

Bearing apparatus includes: (a) a first member comprising rigid material and having a bore defining a first contact surface; (b) a second member disposed in the bore, the second member comprising rigid material and having a cylindrical surface defining a second contact surface; (c) wherein both contact surfaces are wear-resistant, and wherein the first and second members are positioned relative to each other by a plurality of protruding bearing elements contacting at least one of the first and second contact surfaces, so as to transfer mechanical loads between the members, each bearing element including a raised central portion flanked by a pair of beam portions, while allowing relative translation and / or rotation between the members; and (e) wherein the bearing elements are shaped and sized so as to deform elastically and conform in an irregular shape to the at least one contact surface.

A synthetic resin bearing for a photovoltaic tracking system includes first and second bearing members coupled with each other for forming a bearing assembly. Each of the first and second bearing members has a pair of side plate members facing each other. A friction member is positioned between outer peripheral portions of the pair of side plates has an arc-shaped section. A reinforcement member connects the pair of side plates and the friction member, and the first and second bearing members have a coupling protrusion and a concave portion for receiving the coupling protrusion.

An improved sleeve bearing for locomotive traction motor that provides additional lubrication over and above that of the one central wick currently used. The sleeve bearing is provided with a recirculation system comprised of either at least two additional wicks located near the 6:00 operating location or multiple oil communication and delivery grooves passageways communicating with the oil flinger grooves placed for the purpose of collecting and providing a mechanism for providing additional lubrication for extending the oil-wetted envelope available for supporting the truck-axle journal in the axial direction.

The invention relates to an annular ball bearing device, belongs to the field of general machinery parts, and discloses an annular ball bearing with curved arc grooves, which aims at overcoming the defect of incapability of axial displacement of existing bearings. As for the curved-groove ball bearing, straight arc grooves of a traditional ball bearing are changed into the S-shaped curved arc grooves, so that the displacement of reciprocal rectilinear motion of the bearing can be realized while the bearing rotates. According to the technical scheme, straight grooves of inner and outer rings of an existing bearing are changed into curved grooves which are in full symmetry in shape, the number of peaks and valleys of the curved grooves is the same as that of steel balls or is an integer multiple of that of steel balls, so that during the rotating process of the inner and outer rings, a shaft does periodical reciprocal rectilinear motion while rotating. The curved-groove ball bearing disclosed by the invention has the advantages of being capable of changing rotary motion into rectilinear motion, simplifying the mechanical structure of a rubbing roll and being simple in structure and small in size.

A two-stage pump having an internal fluid pathway or cycle for providing cooling to various parts in the pump, such as, an electric motor in the pump, and also for lubricating at least one or a plurality of bearings in the pump. The pump utilized hydrodynamic bearings that are adapted or configured to provide various passageways, channels and the like for using the fluid that is being pumped by the pump as lubrication for at least one or a plurality of bearings in the pump.

The invention relates to a wave-power unit for the production of electric power. It comprises a floating body arranged for floating on the sea and an electric linear generator with a stator (5) and a reciprocating translator (6). The stator (5) is arranged to be anchored in the bed of a sea and the translator (6) is connected to the floating body by connection means, The translator (6) is journalled in a plurality of roiling elements (15) such that a circumferential gap (14) is formed between the stator and the translator. According to the invention each rolling element (15) has an elasticity that is low enough to meet the condition that a change in the width (d) of the gap results in a change in the total force from the roiling elements (15) that is larger than the total magnet forces on the translator resulting from the change in width (d). The invention also relates to a use of the invented wave-power unit.

Disclosed is a component providing rotational, translational and angular movement to a shaft inserted therein. The component has a housing with a bearing aperture, the bearing aperture having an aperture axis, an inner concave surface and a placement ring surface. A combination joint including a hollow bearing and a placement ring are located at least partially within the bearing aperture. The hollow bearing has an outer convex surface adjacent to and at least partially in contact with the inner concave surface of the bearing aperture. The hollow bearing also has an aperture with a cylindrical inner surface. The placement ring has an outer surface adjacent to and at least partially in contact with the placement ring surface of the bearing aperture and has an inner concave bearing race surface adjacent to and at least partially in contact with the outer convex surface of the hollow bearing aperture. A sleeve with a sleeve axis can be located within the aperture of the hollow bearing and has an outer surface adjacent to and at least partially in contact with the cylindrical inner surface of the hollow bearing. The sleeve is slidable within the hollow bearing and the hollow bearing with the sleeve therein can rotate about the sleeve axis and tilt about the bearing aperture axis. In this manner, a component is provided that affords rotational, translational and angular movement to a shaft inserted therein. A seal can be included to protect the combination joint from dust, dirt, debris and the like.

Provided is a bearing bush enabling excellent advancing and retreating movements of a shaft member by eliminating a clearance between the bearing bush and the shaft member to eliminate a backlash therebetween, capable of reducing a load of dimension control on both the bearing bush and the shaft member, and capable of being manufactured at a low cost. The bearing bush (4) for supporting the reciprocating movement of the shaft member (1) in an axial direction has a receiving hole through which the shaft member (1) is passed. Grooves (40) are sequentially formed at predetermined intervals in an inner peripheral surface of the bearing bush (4) facing the receiving hole. An inner diameter of the receiving hole is formed to be equal to or smaller than an outer diameter of the shaft member (1), and the bearing bush is press-fitted to an outer peripheral surface of the shaft member (1) in a state of a so-called interference fit.

A linear roller bearing has raceway elements, which are grouped around the central axis of the bearing, include rows of rolling elements distributed around a circle—as viewed in the cross section—and which are essentially parallel to each other and to the central axis of the bearing, the raceway elements being by enclosed in the circumferential direction by at least one connecting piece on at least one longitudinal section such that the raceway elements bear via the outer surface of the longitudinal section against a facing inner surface of the at least one connecting piece. The inner surface and the outer surface are curved biaxially and bear against each other in two dimensions, thereby resulting in a design similar to that of a ball joint.