9 results about "Linear-motion bearing" patented technology

The invention relates to the field of industrial robot bearings, in particular to a linear motion bearing and a manufacturing process thereof. A linear motion bearing comprises a groove rod, a sliding cavity is formed in the groove rod, a ball is installed in the sliding cavity from one end of the sliding cavity, the ball partially protrudes out of the sliding cavity, and detachable battens are connected to the left side and the right side of a ball seat through bolts. A manufacturing process of a linear motion bearing comprises the steps that S1, a plurality of ball seats are prepared, and a plurality of balls are installed in the ball seats; s2, a plurality of ball seats are installed between the two groove rods, and the two side plates are blocked at the ends of the two groove rods; s3, four sets of slide way components composed of the two groove rods and the two side plates are prepared; s4, the four sets of slide way components are annularly installed between the two annular plates, and the two annular plates are fixed through the four outer plates; and S5, the two circular ring plates and the four outer plates are installed in an outer cover for protection. Parts can be helped to slide linearly, and the balls can be replaced after being damaged.

The application discloses a device for CPD dummy breathing movement, and relates to the technical field of in-vehicle living body detection targets, which is arranged in a chest cavity of a CPD dummy and comprises a driving motor, a driving gear, a driving rack, a sliding shaft mounting seat, a linear motion bearing, a sliding shaft and a breathing push plate. The driving motor is fixed with the driving gear through a driving shaft thereof, the driving rack is fixed on the sliding shaft in an axial direction, the driving gear is engaged with the driving rack, the sliding shaft is slidably connected with the sliding shaft mounting seat through the linear motion bearing, and the breathing push plate is fixed on one side of the sliding shaft. The driving motor drives the driving gear to rotate clockwise or counterclockwise, and drives the sliding shaft to move linearly through the meshing transmission of the gear and the rack, so that the breathing movement of the dummy is realized. The technical scheme of the application adopts the motor driving and gear and rack transmission mode to realize the breathing movement simulation, has small operation difficulty and good flexible adjustment, and can be applied to application scenes with high requirements on breathing frequency and amplitude.

The invention relates to the technical field of mechanical structure optimization, in particular to an ejector rod mechanism for variable pitch propeller pitch measurement, which comprises a self-lubricating roller bearing, a displacement rod, a support, a reset mechanism and a dustproof limiting assembly. Through rolling contact between the self-lubricating roller bearing and the cam, angular displacement is accurately converted into axial linear displacement of the displacement rod, through cooperation with double-point radial constraint of the linear motion bearing and the category limiting assembly, it is ensured that the motion trail is stable, and the propeller pitch measurement precision is improved, and through interference fit between a dustproof ring in the dustproof limiting assembly and the displacement rod, the propeller pitch measurement precision is improved. Foreign matters such as dust and carbon powder are effectively prevented from entering the cavity, clamping stagnation caused by movement is avoided, the reliability of the mechanism in a severe environment is guaranteed, a reset spring in the reset mechanism provides reset elastic force, a displacement rod can rapidly and reversely move when the pitch of a propeller is decreased by adopting a piano steel wire material, real-time dynamic response is achieved, and the reliability of the mechanism is improved. And the real-time measurement requirement of the blade angle is met.

A linear resonance scanning apparatus (100) comprises an electromagnetic drive unit (132) comprising a coil (140) wound about a core (138), the electromagnetic drive unit (132) having a field output end (134). A linear motion bearing assembly (106) is configured to carry a permanent magnet (130), the linear motion bearing assembly (106) having a longitudinal axis of reciprocating motion. A biasing element (122, 126) is disposed adjacent an end of the linear motion bearing assembly (106) to serve as a buffer for motion along the longitudinal axis of reciprocating motion. The permanent magnet (130) has a surface located opposite the field output end (134) of the electromagnetic drive unit (132) in spaced relation to the field output end (134) of the electromagnetic drive unit (132). The permanent magnet (130) is laterally offset with respect to the core (138) so that the core (138) substantially does not overlie the permanent magnet (130) when at rest.

The invention provides a crane beam detection device, and relates to the technical field of crane beam detection. Comprising a detection device, a walking device and a stabilizing device. The walking device comprises a structural frame; the structural frame is located on a crane rail arranged on the top of the crane beam, wheels matched with the crane rail are installed below the structural frame, and a driving mechanism for driving the wheels to move is arranged in the structural frame; the detection device comprises a support frame and a camera; the stabilizing device comprises clamping pieces symmetrically arranged on the two sides of the crane rail. The clamping piece comprises a first linear motion bearing, a second linear motion bearing and a bent shaft, the first linear motion bearing is installed in the middle of the vertical part, the second linear motion bearing is installed at the end, away from the structural frame, of the inclined part of the bent shaft, and the second linear motion bearing supports a lower jaw of the rail head; according to the technical scheme, the problem that in the prior art, a crane beam needs to be detected with naked eyes through manual climbing is solved.

To provide a linear motion bearing having an oil film lubrication structure that is simple in structure, low in cost, provides stable and smooth lubrication in motion, and has a high load capacity. [Solution] The linear motion bearing of the present invention comprises a slide base 1, a slide rail 2, a rod bearing 3, an oil reservoir 22, and a grease spring 23. One or more inner grooves are provided on the opposing surfaces of the slide rail 2 and the slide base 1, and the shape of the inner groove 21 of the slide rail 2 is symmetrical to the shape of the inner groove 11 of the slide base 1. The space between the inner groove 11 of the slide base 1 and the inner groove 21 of the slide rail 2 is an installation space for the rod bearing 3. An oil reservoir 22 is recessed into the inner groove 21 of the slide rail 2 at a predetermined depth and height, and a grease spring 23 having elasticity for expansion and contraction is installed in the oil reservoir 22. The cross-sectional shape of the rod bearing 3 is a polygonal polygon, and at least one angle of the polygonal polygon is a circular arc angle.

The utility model relates to the technical field of grinding equipment, and discloses a reciprocating type grinding machine for clamping fiber oilstones, which comprises a shell, a grinding wheel and a driving device, the air inlet component is provided with an air inlet channel; the turbine is arranged at an air outlet of the air inlet component; the swing arm is eccentrically connected with the turbine; the connecting piece is hinged to the swing arm; the telescopic main shaft is used for clamping fiber oilstones, the telescopic main shaft is arranged in the shell, at least one part of the telescopic main shaft extends out of the shell, and the telescopic main shaft is connected with the connecting piece; the linear motion bearing sleeves the telescopic main shaft and is attached to the inner wall of the shell; the locking lantern ring is arranged on the telescopic main shaft in a sleeving mode and used for locking the fiber oilstone to the telescopic main shaft. Better structural strength is achieved, and the fiber oilstone is not prone to breakage; and clamping is flexible, adaptability is high, consumed fiber oilstones can be pulled out conveniently, and replacement operation is convenient.

A simple oil film lubrication structure for a linear motion bearing includes at least two polygonal rod-shaped bearings paired with a slide block and a slide rail. The polygonal rod-shaped bearings are positioned in at least one recessed groove between the opposing surfaces of the slide block and the slide rail. Each recessed groove on both sides of the slide rail has an oil reservoir with a predetermined depth and height. An oil-applying spring with telescoping and binding elasticity is installed in the oil reservoir. The outer diameter of the oil-applying spring is equal to or smaller than the predetermined depth and height of the oil reservoir in the recessed groove of the slide rail. This constitutes a practical and innovative structure for simple oil film lubrication, effectively achieving simple oil storage structure, low cost, high lubrication efficiency, quiet and smooth movement, and dust and scale prevention.