78results about "Combination bearings" patented technology

This utility model relates to the field of ball spline technology and discloses a high-stability rolling guide device with self-lubricating function. It includes a housing, a guide fixedly connected to the inner wall of the housing, an installation mechanism inside the guide, a spline shaft fixedly connected to the inner wall of the guide, and a guide mechanism outside the spline shaft. The guide mechanism includes an upper cover, the inner wall of which is slidably connected to the upper middle part of the outer wall of the spline shaft, a lower cover bottom structure slidably connected to the lower middle part of the spline shaft, and a lower cover top structure slidably connected to the top of the lower cover bottom structure. Multiple protrusions are fixedly connected to the inner walls of both the upper cover and the lower cover bottom structure. In this utility model, the third and fourth sliding grooves have a certain inclination, allowing the high-speed running balls to smoothly bend and turn, reducing the impact on the upper and lower covers, averaging the force at each stage, and reducing the pushing phenomenon during high-speed operation of the device.

A telescoping mechanism includes a handle including a motor and a controller operatively connected to the motor for controlling operation of the motor, a spindle operatively coupled to, and configured to be rotated by, the motor. The spindle is not journaled by the motor and instead is journaled by a bearing support distanced from the motor. Telescoping segments are coupled to the spindle. The telescoping segments are nested together in a contracted orientation and extend outwards upon rotation of the spindle.

The present invention relates to the field of precision transmission components and discloses a composite precision transmission device, including a linear transmission component, which is rotatably arranged in a rotating transmission component. The rotating transmission component includes an outer ring sleeved outside the linear transmission component, a rolling support ring arranged between the outer ring and the linear transmission component, and a first rolling body arranged on the rolling support ring. A first limiting mechanism for limiting the axial movement of the rolling support ring relative to the linear transmission component is provided on the linear transmission component. The first limiting mechanism includes two closed retaining rings fixedly sleeved on the outer wall of the linear transmission component, the closed retaining rings are fitted with both ends of the rolling support ring, and a second limiting mechanism for limiting the axial sliding of the closed retaining ring relative to the rolling support ring is provided on the outer ring. The device can realize linear motion and rotational motion, has a small size, high precision and a long service life.

The present invention describes a detachable connection between a pitch control unit arm (5) and a pitch angle piece (8) of a blade holder (7) in a tail rotor head (3) of a tail rotor (1) of a rotary wing aircraft, said detachable connection comprising a pin connecting said pitch angle piece (8) attached to the blade holder (7) with said pitch control unit arm (5) of a pitch control unit (4), thereby reducing material wear and shortening the maintenance cycle. This is achieved because said pin is designed as a sliding pin (9) protruding between the pitch angle piece (8) and the pitch control unit arm (5), which in its length direction passes through a spherical bearing in the form of a ball (6) with a central ball through hole (61), wherein the ball (6) and the part of the sliding pin (9) are surrounded by an outer ring (60) of the spherical bearing, thus allowing a sliding and pivoting movement of the sliding pin (9) inside the spherical bearing.

A ball spline device includes a spline shaft, the outer side wall provided with raceway grooves extending in the axial direction, each raceway groove comprising, a first groove section and a second groove section, and the width of the second groove section being greater than that of the first groove section; a spline nut coaxially fitted over the spline shaft; and first rolling bodies. When the spline nut is located at a first position, the first rolling bodies are located in the first groove sections and in constraint fit with the first groove sections; and when the spline nut is located at a second position, the first rolling bodies are located in the second groove sections, such that the spline nut and the spline shaft have a preset movement amount in the circumferential direction. Further provided are an automated guided vehicle and a stereoscopic warehouse system.

Guide bearing with multiple pressure measurement points, System for measuring the viscosity or the Reynolds number of a fluid, with a rod guided by the bearing, Application to monitoring in bio-production. A guide bearing of central axis (X), including a ring, intended to be mounted tightly in a holding structure, the inner surface of which is designed for assembling with a clearance fit, and preferably guiding in translation along the axis X, a tube intended to constitute a measurement rod; an angulation element formed integrally or fixed inside the inner surface of the ring by protruding into it, so as to form an angulation axis of the tube relative to the axis X; a plurality of pressure sensors each designed to measure a point of pressure exerted by a contact point of the tube in one of its angular positions, the pressure sensors being distributed along the inner surface of the ring, on either side of the angulation element.

A bearing sleeve, equipped with a grooved opening on its side for tightening onto the connecting bar, has cable ties attached in limiting slot holes to further secure the bearing sleeve and connecting bar, preventing the bearing sleeve from slipping. A connecting element is also attached to the bearing sleeve between the two limiting slot holes, resulting in a simple structure and convenient installation. The application of the bearing sleeve in aquaculture and livestock equipment ensures that the cage connecting element in the equipment does not wear easily when attached to the connecting bar. Figure 10

The present disclosure provides a shear assisted extrusion press comprising a stem and plunger assembly comprising a main piston configured to generate an extrusion force, a stem assembly comprising a stem having a first end and a second end, wherein the second end connects to a rotary piston that connects to the stem and plunger assembly, wherein the main piston exerts the extrusion force on the stem such that the stem moves axially, and at least one piston motor coupled with the stem and configured to drive a rotational movement of the rotary piston and the stem, and a container assembly comprising a container holder, a container configured to receive a billet and the first end of the stem, and at least one hydraulic motor positioned in the container holder with the container, wherein the at least one hydraulic motor is configured to drive a rotational movement of the container.

To provide a slide bearing which enables easy aligning of a rotary shaft, prevents partial wear, and achieves the long life, and to provide an angling machine including the slide bearing.SOLUTION: A slide bearing includes: a first member which has a through hole and includes a first recessed spherical surface part formed at one end of the through hole; a second member which has a through hole, includes a second recessed spherical surface part formed at one end of the through hole, and can be fixed to the first member so that the second recessed spherical surface part faces the first recessed spherical surface part of the first member; a ball bearing which has a through circular hole formed in an axial direction and has a protruding spherical surface part, which corresponds to the first recessed spherical surface part and the second recessed spherical surface part, on its outer peripheral surface; and a resin bush which has a shaft hole, into which a rotary shaft is inserted, and is inserted and fitted into the through circular hole of the ball bearing in a detachable manner. The ball bearing is fastened between the first member and the second member in a state that the protruding spherical surface part of the ball bearing slidably contacts with the first recessed spherical surface part of the first member and the second recessed spherical surface part of the second member.SELECTED DRAWING: Figure 4

An actuator assembly comprises a static part and a movable part. A helical bearing arrangement supporting the movable part on the static part guides helical movement of the movable part with respect to the static part around a helical axis. One or more actuators, that are not shape memory alloy actuators, are arranged to drive movement of the movable part around the helical axis, which thereby includes a component of translational movement along the helical axis. The helical movement increases the force within the actuator assembly allowing actuation of heavier movable parts, and may improve posture.

The present invention provides a ball screw that prevents lubricant leakage during normal use and allows for easy discharge of old lubricant when supplying new lubricant, thereby preventing seal damage and maintaining good lubrication. [Solution] The ball screw 10 comprises a screw shaft 20 having a screw groove 21 formed on its outer circumference, a nut 30 having a screw groove 31 formed on its inner circumference, a plurality of balls 22 that roll along a load trajectory formed by the screw groove 21 of the screw shaft 20 and the screw groove 31 of the nut 30, and a sealing member 50 attached to the axial end of the nut 30 to seal the gap 12 between the screw shaft 20 and the nut 30. The sealing member 50 has a lubricant discharge portion 13, which is closed when the pressure inside the nut 30 is equal to the pressure outside the ball screw 10, and opens to penetrate the screw shaft 20 in the axial direction when the pressure inside the nut 30 increases.

A ball screw device includes a nut including a nut main body and a cover, a screw shaft, a rolling path formed by a screw groove of the nut main body and a screw groove of the screw shaft, a circulation path formed by an outer circumferential surface of the nut main body and the cover, a pair of connection paths that allow one end of the circulation path and one end of the rolling path to be communicated with each other and allow the other end of the circulation path and the other end of the rolling path to be communicated with each other, respectively, and a large number of balls disposed in the rolling path, the circulation path, and the pair of connection paths. The circulation path is formed along a cylindrical path of the outer circumferential surface of the nut main body.

The present application relates to positioning device, disclose a kind of two degrees of freedom positioning composite slide rail assembly, including linear guide and positioning pin, linear guide is opened with semicircular slide rail groove along its length direction, and is opened with guide slot along slide rail groove;Positioning pin includes two groups of relative arrangement, and the workpiece to be positioned is clamped between two groups of the positioning pin;Wherein, positioning pin includes guide sliding mechanism and pin mechanism, guide sliding mechanism is located in slide rail groove and moves in direction along guide slot advances or retreats, pin mechanism is rotationally connected on the guide sliding mechanism, and pin mechanism is coaxially locked with guide sliding mechanism by locking mechanism.The slide rail assembly of the present application, not only can realize to along X, Y, Z axis one-way movement operation, and rotate the circumferential position of the workpiece to be positioned is adjusted, realizes the linear movement or / and rotation of the workpiece to be positioned two degrees of freedom convenient adjustment, improve its practicality.

A planetary gearbox having two ring gears arranged in different planes, of which a first ring gear and a second ring gear are designed to mesh during operation with at least one planet gear of a respective planet gear set, wherein a thrust washer is arranged axially between the two ring gears and a first contact area for making contact with the first ring gear is present on the first end face and a second contact area for making contact with the second ring gear is present on the second end face.

A ball screw spline assembly comprises: a ball screw spline (500) including a first nut (520) including a first mounting surface (522) adapted to receive a first fastening element (230) for installing the first nut (520) to a housing; a second nut (530) including a second mounting surface (532) adapted to receive a second fastening element (240) for installing the second nut (530) to the housing; and a shaft (510) passing through the first nut (520) and the second nut (530); the housing including a first portion (600) and a second portion (650), wherein the first portion (600) extends in a direction substantially parallel to the shaft (510), and the second portion (650) extends in a direction substantially perpendicular to the shaft (510); a connecting plate (540) coupling the second nut (530) to the first portion (600), wherein the first nut (520) is installed to the second portion (650); wherein the first mounting surface (522) and the second mounting surface (532) are located within a space defined by the first portion (600), the second portion (650) and the connecting plate (540), such that the ball screw spline (500) is integrally installable to the housing. And a method for installing the ball screw spline is also disclosed. The ball screw spline (500) is integrally installable to the housing, and thus there is no need to remove the spline nut from the shaft (510) when installing and maintaining the ball screw spline (500). With the bolts adapted to be received within the housing without protruding from the housing, the robot arm comprising the ball screw spline assembly can be compact since the pulley no longer interferes with the bolts mounted on the spline nut.

The invention relates to a bearing assembly, in particular for a converter, comprising a rolling bearing (5) having an outer ring (9) which is arranged in an inner housing (3), the inner housing (3) being movable with respect to an outer housing (4) in the axial direction of the rolling bearing (5) by means of a two-row linear rolling bearing structure (12), and the rotational axes of all the rolling elements (19) in each row (17, 18) of the linear rolling bearing structure (12) lying in a common plane, and the two planes being at an oblique angle to one another. At least one anti-rotation element (24) which engages in a mating contour (25) in the outer housing is connected to the inner housing (3).

Summary: A swivel table comprises: a base portion; a linear motion mechanism including a rail fixed to the base portion and a slide member relatively movably mounted on the rail; a drive source causing the slide member to perform a linear reciprocating motion; a first support portion fixed to the slide member and performing a linear reciprocating motion together with the slide member; a first rolling bearing fixed to the first support portion; a table portion capable of performing a swivel motion with the force transmitted from the drive source; a second support portion supporting the table portion; a second rolling bearing fixed to the second support portion;and an eccentric shaft comprising a first shaft portion and a second shaft portion arranged eccentrically with respect to the first shaft portion, wherein the first shaft portion is supported by the first rolling bearing and the second shaft portion is supported by the second rolling bearing;

To provide a silicon nitride sintered body having excellent mechanical characteristics and exhibiting an excellent product life when fabricated into a product, a machine component using the same, and a bearing.SOLUTION: The silicon nitride sintered body is of crystallinity of not lower than 75% and not higher than 90% obtained from a XRD diffraction pattern of a mirror polished cross section thereof using the following equation, with its amorphous phase including at least one species selected from the group consisting of Y, Ce, Nd and Eu, and neither an inclusion of a diameter of larger than 50 μm nor a pore of a diameter of larger than 50 μm being present in its surface layer. Crystallinity(%)=[peak area of crystalline phase / (peak area of crystalline phase+peak area of amorphous phase)]×100.SELECTED DRAWING: Figure 1

The present invention relates to a steering actuator for a steering system of a motor vehicle, comprising an actuator rod which can be linearly translated in a housing axially in the direction of its longitudinal axis (A) and which has a guide portion which is axially displaceably and slidably mounted in a passage (71) of a sliding bushing fitted in the housing, wherein the guide portion has a non-round guide cross-section which is interlockingly secured, in a corresponding non-round passage cross-section of the passage (71), against rotation about the longitudinal axis. In order to provide improved play-free guidance, the invention proposes that the sliding bushing has two bearing portions (72a, b) which are rotationally loaded against one another about the longitudinal axis and are braced against the guide portion.

Provided are: a multi-row bearing which makes it possible to measure an axial dimension of a portion between raceway grooves with high accuracy and ease in a short time, thereby allowing processing of a portion between the raceway grooves with high dimensional accuracy; and a bearing unit provided with the multi-row bearing. In a multi-row bearing (10), an inner ring raceway groove (31a) of a one axial end part is formed between groove shoulders on both axial sides of a groove bottom, and an inner ring raceway groove (31b) of an axial intermediate part is formed between the groove bottom and one of the groove shoulders on one axial side. Further, an outer ring raceway groove (21a) of another axial end part is formed between groove shoulders on both axial sides of a groove bottom, and an outer ring raceway groove (21b) of the axial intermediate part is formed between the groove bottom and one of the groove shoulders on one axial side.

The swing table is provided with a base part; a linear motion mechanism including a guide rail attached to the base portion and a slider attached to the guide rail so as to be capable of moving relative to the guide rail; a driving source for linearly reciprocating the slider; a first support part which is installed on the slide block and performs linear reciprocating motion together with the slide block; the first rolling bearing is mounted on the first supporting part; a stage part to which power from the drive source is transmitted so as to be able to oscillate; a second support part for supporting the table part; the second rolling bearing is mounted on the second supporting part; and an eccentric shaft including a first shaft portion supported by the first rolling bearing and a second shaft portion disposed at an eccentric position with respect to the first shaft portion, the second shaft portion being supported by the second rolling bearing.

The disclosed invention describes a detachable connection between a pitch control unit arm (5) and a pitch horn (8) of a blade holder (7) in a tail rotor head (3) of a tail rotor (1) of a rotary wing aircraft, comprising a pin connecting the pitch horn (8) attached to a blade holder (7) with the pitch control unit arm (5) of a pitch control unit (4), by protruding through an arm through hole (50) and at another edge through a pitch horn through hole (80), whereby material wear is reduced and maintenance intervals can be reduced. This is reached because the pin is designed as a sliding pin (9) projecting between pitch horn (8) and pitch control unit arm (5), which is running in the course of its length through a spherical bearing in form of a ball (6) with a central ball through hole (61), wherein the ball (6) and a part of the sliding pin (9) are surrounded by an outer race (60) of the spherical bearing, as such a sliding motion and a pivoting motion of the sliding pin (9) inside the spherical bearing is allowed.

An actuator apparatus includes an actuator rod with an interior cavity and a set of rod holes. Each rod hole extends through the actuator rod to the cavity. The set of rod holes is positioned in a straight line. The apparatus includes a light assembly that is positioned to light the cavity. The apparatus includes an actuator block that includes an opening extending through the actuator block sized to conform to an outer surface of the actuator rod and a set of block holes in the opening. Spacing between the block holes matches spacing between the rod holes. The actuator block includes a light sensor positioned in a block hole to sense light coming through a rod hole aligned with the block hole and a ball bearing for each block hole of the set of block holes without a light sensor and extending partially through the corresponding block hole.

The invention provides a bearing structure of an armature push rod sub-assembly of a variable-force electromagnetic valve. The bearing structure comprises a rubber-coated base, a lining, a push rod and an armature, a mounting groove with a top opening is formed in the rubber coating base; a supporting table is arranged at the groove bottom of the mounting groove in the axial direction; stepped holes which are coaxially distributed are formed in the top face of the supporting table. The stepped hole comprises a first hole located at the upper part and a second hole located at the lower part; the bushing is fixed on the first hole, the push rod is movably connected in the second hole, and the push rod is in coaxial clearance fit in the bushing; the armature is coaxially fixed to the push rod, the upper end of the push rod penetrates through the armature, and the armature is arranged on the supporting table in a sleeving mode. The structure has the advantages that a bearing tube structure with high unit price is omitted, the hot melting lining is added and combined with the original pole piece lining to form the upper and lower double-lining bearing structure, the structure is more concise and stable, the response speed and the control precision of the electromagnetic valve are further improved, the material cost of the electromagnetic valve is reduced, and the market competitiveness is improved.

The invention relates to a drive arrangement for a flap (2) of a motor vehicle (3), wherein a first drive train (4) has a first drive (5) for generating a first drive movement between a flap-side drive connection (7) and a body-side drive connection (8), wherein in a normal state the first drive movement causes the flap (2) to open from a closed position to an open position, wherein the flap-side drive connection (7) is part of a first coupling device (12) of the first drive train (4) and the body-side drive connection (8) is part of a second coupling device (13) of the first drive train (4), wherein the flap (2) is also adjustable from the closed position to a collision position.It is proposed that the first and / or second coupling device (12, 13) is each designed as a ball groove joint (17) with an elongated joint socket (18) and a joint head (19) mounted therein that is linearly displaceable and rotatable, and that when the flap (2) is moved from the closed position to the collision position, the first drive train (4) is moved from its normal state to an avoidance state in which the joint head (19) is displaced relative to the elongated joint socket (18) compared to the normal state in which the joint head (19) is in a normal position relative to the elongated joint socket (18).