131results about How to "Avoid local wear" patented technology

An elastic-bodied crawler, in which damages, such as local wear, coming-off of driven projections and the like in use, are prevented from being brought about, and frictional resistance is decreased at engaging portions to provide for durability, comprises a body with a reinforcement layer of reinforcement cables embedded therein circumferentially, driven projections provided in a predetermined pitch on an inner peripheral surface of the body, lug portions formed on an outer surface of the body, and reinforcement members (driven projection reinforcement cables) embedded to bridge the driven projections and the body.

A CMP pad conditioner including: (a) a disk-shaped substrate having a working surface which is provided by one of its axially opposite end surfaces and which is to be brought into contact with the CMP pad; and (b) abrasive grains which are fixed to the working surface. The substrate includes a radially inner portion and a radially outer portion which is located radially outwardly of the radially inner portion. The working surface in the radially outer portion is inclined with respect to the working surface in the radially inner portion, such that a thickness of the radially outer portion as measured in an axial direction of the substrate is reduced as viewed in a direction away from an axis of the substrate toward a periphery of the substrate. A ratio of an outside diameter of the radially inner portion to an outside diameter of the substrate is 60-85%.

There is provided a conveyor apparatus free of pulsing motion in circulating chains to provide a comfortable ride quality on steps.

A conveyor apparatus 1 includes a step guide rail 3, a plurality of steps 5, a step chain 4, and a chain driving mechanism 10 for driving the step chain 4. The chain driving mechanism 10 includes a rotating and driving unit 11, a driving sprocket 12 which is rotated by a driving force given by the rotating and driving unit 11, and circulating chain 13 for giving a thrust to the step chain 4. The circulating chain 13 has chain links 13a and hinges 13b to be connected to the adjacent chain links 13a. The chain link 13a includes a placing surface 13c on which the step roller 4b is placed, and pressing surfaces 13d and 13d that are in contact with step rollers 4b.

In a rotary magnet sputtering apparatus, a target consumption displacement quantity is measured, and corresponding to the measurement results, a distance between a rotating magnet group and a target is adjusted, and uniform film forming rate is achieved over a long period of time so as to reduce the change of a target surface due to consumption of the target and to reduce the change of the film forming rate with time. An ultrasonic sensor or a laser transmitting/receiving device may be used as a means for measuring the consumption displacement quantity of the target.

A radius of curvature (R1) of a corner portion (40) on one side (an inside in an axial direction) of a groove of a tyre (20) is smaller than a radius of curvature (R2) of the other corner portion (41). Both of the radii of curvature (R1) and (R2) are set to be 2 mm or more. A first phantom circle (42) for defining the corner portion (40) is inscribed on a second phantom circle (43) for defining the corner portion (41). A point of contact (44) of the first phantom circle (42) and the second phantom circle (43) is positioned on an outside from the center of a groove (28c). A distance between the center of the groove (28c) and the point of contact (44) is equal to or smaller than one fifth of a width (B) of the groove (28c).

A high pressure resistance and anti-abresive reciprocating seal with flushing ring relates to the lunger pistom of reciprocating pump and packing seal, it is characterized in that two set of packing seal combines with a set of muff clearance seal, namely two guide sleeve closing side of cylinder combines with a flushing ring and main packing seal with subsidiary packing seal closing air. The gland of main packing seal is a seal box of subsidiaty one. Injecting flushing lubricating oil into between main and subsidiary packing seal, the front-end of main packing seal has a flushing ring, which adopting synchronized hydraulic oil to be as flush fluid of packing box, the effect of flush fuid is that flushing the particle medium between lunger pistom and main packing seal, at the same tine between filling and lunger pistom formed a fluid film to avoid directing friction between filling and lunger pistom,and takes away heat caused by friction, which can prolong the life of seal. The invention is applicable to all conveyors solid particles media reciprocating pump.

The invention relates to a rotary motion and reciprocating motion converting device (20) which comprises pistons (72, 74, 76, 78), wherein one end of each piston rods (62, 64) is connected with the pistons (72, 74, 76, 78); a shell (25) is installed on a base seat (11); a side wall (28) of the shell (25) is provided with a bearing seat (5); a transmission shaft (6) is installed in the bearing seat (5); the transmission shaft (6) is provided with transmission wheels (15, 17); the edge parts of the transmission wheels (15, 17) are provided with column pins (7, 71) extending out axially; a first gear (10) and a second gear (14) which can rotate relative to the transmission shaft (6) are installed close to the transmission wheels (15, 17); the first gear (10) and a first rack (2) are meshed mutually; the second gear (14) and a second rack (22) are meshed mutually; the first rack (2) and the second rack (22) are respectively positioned at two sides of the transmission shaft (6); connecting plates (90, 91) are connected with the end parts of the first rack (2) and the second rack (22); the connecting plates (90,91) are connected with other ends of the piston rods (62, 64); tooth-free parts of the first gear (10) and the second gear (14) are respectively provided with pin grooves (9, 21); the pin grooves (9, 21) are internally provided with sliding blocks (32, 42) which are matched with the column pins (7, 71); and the restoration springs (12, 121) are arranged below the sliding blocks (32, 42). Thus the conversion between the rotary motion and the reciprocating motion is realized.

The lip-type seal of the present invention is a lip-type seal with which the outer periphery of a rotational shaft (S) supported by a predetermined housing (H) is sealed. This lip-type seal includes a seal ring (20) made of an elastic material so as to have an annular fitted part (21) that is fitted to the housing and a lip part (23) that extends from the fitted part inwardly in a radial direction in the shape of a substantially conical ring and that is brought into contact with the shaft, and a support ring (30) including an annular joint part joined to the fitted part and an annular supporting part (33) that defines a hole (30a) through which the shaft passes, that extends from a side of the joint part to a halfway area of the lip part, and that supports the lip part from the inside in the radial direction. In this lip-type seal, the lip part (23) is tapered in cross section from an area from which noncontact with the supporting part (33) starts toward an end thereof. Therefore, wear is reduced in a high-pressure environment, and durability is improved while securing a desired sealing capability.

The purpose of the invention is to prevent accumulation of particulates on the outside of a net body of a particulate sifter having a cylindrical net body and to extend the lifetime of the net body. To achieve the purpose, in a particulate sifter which is provided with a sieve 21 having a cylindrical net body 26 extending in a horizontal direction and a booster having rotating blades which rotate along the inner surface of the net body 26 and which separates particulates that pass through the net body 26 from particulates and/or foreign substances that do not pass through the net body 26 while agitating the particulates that have flowed inside the sieve 21 with the booster, the sieve 21 is located rotatably around the central axis of the cylindrical net body 26. The sieve 21 may be rotated forcibly by an electric motor as a driving source or may be rotated by kinetic energy of particulate-air mixture agitated by rotating blades without a driving source.

Bearing structure of a pedal device, wherein a support member having a cylindrical outer peripheral surface is fixedly attached to a pedal bracket to be substantially horizontal, a boss of a pivot member radially outside the support member via a pair of flanged bushings each made of resin and having a flange portion at one end of a cylindrical portion so the boss turns about an axis, both axial ends of the flanged bushing cylindrical portion closely contact the boss inner peripheral surface; the flanged bushing cylindrical portion have, in intermediate portion, in an axial direction, a narrow portion having both inner and outer peripheral surfaces reduced in diameter so the narrow portion is curved inward in radial direction; the narrow portion smallest inside diameter being smaller than the support member outside diameter having interference; at least the narrow portion smallest diameter portion of elastically closely contact the support member outer peripheral surface.

An integral type thrust bearing is proposed which can be manufactured with fewer heat treatment steps. The retainer and the inner and outer rollers not hardened are assembled together with rollers into a bearing and thereafter the assembled bearing is carburized, hardened and tempered. This eliminates the need for individual heat treatment of the retainer and the inner and outer rings and decreases heat treatment steps for the production of thrust bearings.

A sprocket for preventing the partial wear on the teeth of the sprocket. The teeth of the sprocket comprised of a pair of side portions located on opposite sides of a tooth and a central portion located between the pair of sides. The pair of side portions has a hardness greater than the central portion.

The invention discloses a high-efficiency uniform feeding, sieving and crushing system for polysilicon and monocrystalline silicon and a method thereof. The system comprises a material cabin, a feeding machine, a crushing machine, an electronic valve, an accumulation amount detecting device and a control sub-system. The feeding machine comprises a feeding box, a vibrating motor and a screen mesh.The feeding box is provided with a box opening facing an upper discharging hole. One end of the screen mesh is positioned below the box opening; and the other end of the screen mesh faces a discharging end. The vibrating motor is used for moving a silicon material to the other end of the screen mesh in one direction to fall into a lower discharging hole. The accumulation amount detecting device isused for detecting the accumulation amount of the silicon material. The control sub-system is used for reducing the opening/closing frequency or opening/closing amplitude of the electronic valve whenthe accumulation amount is greater than a first preset accumulation amount, and increasing the opening/closing frequency or opening/closing amplitude of the electronic valve when the accumulation amount is smaller than a second preset accumulation amount. According to the high-efficiency uniform feeding, sieving and crushing system for the polysilicon and monocrystalline silicon and the method thereof, the silicon material uniformly falls into the crushing machine for crushing; the overall production efficiency of crushing is improved; the rejection rate of the silicon material is reduced; and the particle size of the finally crushed silicon material is more uniform.

A thrust bearing, wherein a cage (2) and inner and outer rings (3, 4) in non-quenched state are assembled with each other in the bearing formed integrally with rollers (1), and a carburizing and quenching, and tempering treatments are applied to the assembled bearing, whereby since the individual heat treatment for the cage (2) and the inner and outer rings (3, 4) can be eliminated, the heat treatment steps for the integral thrust bearing can be reduced.

A paper discharge device and an image forming apparatus having the same are provided. In the paper discharge device, the paper discharge roller has a non-uniform diameter extending in a longitudinal direction and the idle roller contacts with the paper discharge roller in the longitudinal direction of the paper discharge roller so that the print paper unfolds and discharges utilizing a velocity differential at a nip between the paper discharge roller and the idle roller.

Provided is a magnetron sputtering apparatus that increases an instantaneous plasma density on a target to improve a film forming rate. The magnetron sputtering apparatus includes a substrate to be processed, a target installed to face the substrate and a rotary magnet installed at a side opposite to the substrate across the target. In the magnetron sputtering apparatus, plasma loops are formed on a target surface. The plasma loops are generated, move and disappear in an axis direction of the rotary magnet according to a rotation of the rotary magnet.