62results about How to "Reduced sliding wear" patented technology

The invention provides a method for a laser preparation of a titanium nitride gradient coating on a surface of titanium and titanium alloy. The method comprises the steps of performing surface cleaning treatment, surface blackening treatment and preheating treatment for a workpiece subatrate; and then carrying out laser nitriding treatment. The method is characterized in that the laser nitriding treatment is performed in a condition of filling reaction gas, and simultaneously laser scanning treatment and ultrasonic oscillating treatment for the surface of the workpiece subatrate are carried out. The titanium nitride gradient coating with a thickness of 50-200 [mu]m is obtained on the surface of the titanium and titanium alloy. The titanium nitride gradient coating is mainly composed of a nitride layer and a nitrogen diffusion layer, and has uniform transition of the coating microstructure. The surface hardness, wear resistance and corrosion resistance of the titanium nitride gradient coating are improved significantly than those of the matrix. Also, problems that crack are easy to produce, surface roughness is large, and the crystal grains of dendrite crystals of a nitride layer are coarse, in ordinary laser gas nitriding processes, are solved.

The purpose of the present invention is to provide an electrical connector capable of stable conduction and of minimizing sliding friction as much as possible even when a contact load is small. This electrical connector (1) comprises a male connector (2) and a female connector (3) connected so as to be capable of engaging / disengaging with one another. The male connector (2) is provided with a male tab (11), and the female connector (3) is provided with a housing part (21) into which the male tab (11) is inserted. The housing part (21) is provided with a contact part (30) and a holding part (31) for compressing the male tab (11), and electrically connected to one another. A projection (40) is provided on the contact part (30) and / or the holding part (31). The male tab (11) is provided with a recess (41) capable of accommodating the projection (40). The contact part (30), the holding part (31) and the projection (40) are configured as one component.

The inveniton relates to a cam device. This cam device has freely rotatable cam-followers for making prescribed motion along a groove 10 formed of first and second side walls 11 and 12. The individually freely rotatable first and second cam-followers 21 and 22 are arranged in a pair, the axes L of the pair of cam-followers 21 and 22 are set so as to mutually become the same direction, the motion of the first cam-follower 21 is regulated by at least a part of the first side wall 11, and the motion of the second cam-follower 22 is regulated by at least a part of the second side wall 12. The cam device has excellent durability.

Drain oil is discharged into an oil drain passage from an advance angle port and discharge port, or from a delay angle port and discharge port; the drain oil may be mixed with foreign matter. The flow of such foreign matter accompanying the drain oil, even if flowing toward an electromagnetic actuator, can be hindered from reaching a high magnetic flux density portion by each of a pipe, a hollow shaft, and a collar. The high magnetic flux density portion, which is easy to be affected by influence of the foreign matter, can be prevented from suffering from the arrival of the foreign matter; this prevents an occurrence of the slide abrasion and / or the slide defect of a plunger, improving the reliability of an oil control valve.

The invention provides a method for preparing fine-grain Ti3Al / TiN gradient coatings on titanium and titanium alloy surfaces. The method includes the steps that under the nitrogen atmosphere, laser scanning processing, synchronous in-situ aluminum powder feeding and ultrasonic vibration treatment are simultaneously conducted on the titanium and titanium alloy surfaces of workpiece substrates, so that the fine-grain Ti3Al / TiN gradient coatings are prepared on the titanium and titanium alloy surfaces. The invention further provides a device for preparing the fine-grain Ti3Al / TiN gradient coatings on the titanium and titanium alloy surfaces. The method has the advantages that operation is easy and convenient, locating heating can be achieved, contact processing is avoided, a needed preparation time is short, and the depths of the Ti3Al / TiN gradient coatings are controllable. Compared with the prior art, the prepared fine-grain Ti3Al / TiN gradient coatings have the advantages of being free of air holes and cracks, having low surface roughness, achieving grain refinement, having high hardness and good wear-corrosion resistance, being reduced in surface residual stress and the like.

Three or more attachment pins are arranged on a right lateral surface of a nozzle ring at intervals. All the attachment pins are placed outside support holes in the nozzle ring in radial directions of the nozzle ring. A guide ring is provided across right lateral surfaces of the attachment pins. A first side guide member to support a right lateral surface of a drive ring in away that allows the right lateral surface to be in sliding contact therewith is provided to the right of the guide ring. A second side guide member to support a left lateral surface of the drive ring in a way that allows the left lateral surface to be in sliding contact therewith is provided to the left of the guide ring.

The invention discloses a multi-cylinder rotary compressor. The multi-cylinder rotary compressor comprises a sealing shell, wherein the sealing shell comprises a cylindrical shell and an upper end plate; a motor and a compression mechanism part are accommodated in the sealing shell; and the motor has a stator and a rotor. The compression mechanism part comprises a first compression cavity and a second compression cavity, a middle separation plate having a middle bearing, a first piston and a second piston, a first slide piece and a second slide piece, a crankshaft, and a first sealing plate and a second sealing plate, wherein the crankshaft comprises a first eccentric shaft and a second eccentric shaft, a middle shaft for connecting the eccentric shafts, a secondary shaft connected with the first eccentric shaft and a main shaft connected with the second eccentric shaft and fixed with the rotor; at least one of the first eccentric shaft and the second eccentric shaft and the crankshaft are in a separate combination type; at least the middle shaft slidingly fits a middle bearing; and the main shaft slidingly fits an end plate bearing in the upper end plate. The multi-cylinder rotary compressor improves the reliability of the crankshaft operating with high speed and high load.

A plurality of pairs of contact terminals accommodated in a card edge connector include back surface members having one ends to which lead wires are connected and another ends being folded to form movable members. Until a circuit board of a control unit is inserted, end portions of the movable members are held in conductive contact with each other. When the circuit board is inserted, the movable members are separated and brought into contact with copper foil terminals. When the circuit board is removed, the movable members plastically deform and are opposed to each other with an initial gap smaller than a thickness dimension of the circuit board. With this arrangement, wiring inspection may be performed with opposed movable members shorted to one another, but for subsequent circuit board insertion at the second or subsequent insertion and removal of the circuit board, the movable members will be slightly separated by a gap to suppress slide abrasion during insertion.

A wear resistant, heat resistant conveyor chain comprising a series of links, each having a heat resistant roller rotatably fitted onto a bush between inner plates. The links are interconnected in the longitudinal direction of the chain by outer plates, and connecting pins rotatably inserted into the bush. A wear resistant, heat resistant sleeve-shaped spacer protrudes beyond the end surfaces of the heat resistant rollers toward the right and left inner plates to eliminate any sliding contact between the end surface of the heat resistant roller and the inner side surface of the inner plate.

The invention discloses a TV stand, the angle of which can be adjusted. The TV stand comprises a TV bracket and a support of the bracket; an angle demodulator is connected between the TV stand bracket and the support; the angle demodulator comprises a motor; a crank is installed on an output shaft of the motor; a connecting rod is movably connected to the crank; the support is fixedly connected with the motor of the angle demodulator; the TV bracket is hinged with the connecting rod of the angle demodulator, or the TV bracket is fixedly connected with the motor of the angle demodulator; and the support is hinged with the connecting rod of the angle demodulator. The TV stand has the advantages of simple structure, light weight, low cost, easy manufacture, less possibility of abrasion and convenient maintenance.

An electrical contact pair and a connector terminal pair that can reduce the amount of sliding wear in a contact portion. The electrical contact pair includes a first electrical contact, a second electrical contact, and a contact portion. The first electrical contact includes, above a first conductive base material, an Ag—Sn alloy layer, and a first AG layer that is laminated on a surface of the Ag—Sn alloy layer, and the first AG layer is exposed as the outermost surface. The second electrical contact includes a second AG layer above a second conductive base material, and the second AG layer is exposed as the outermost surface. The contact portion is obtained as a result of a surface of the first AG layer of the first electrical contact and a surface of the second AG layer of the second electrical contact being in contact with each other.

The invention discloses a fan assembly of an air-aspiration type planting machine. A fan wheel (26) in a fan (1) is connected with a wheel (10) in a unidirectional automatic clutch device through a ribbed belt (2) in a transmission manner; one end of a negative pressure suction hole (25) in the fan (1) is connected with a negative pressure stabilizer (11), and the other end of the negative pressure suction hole (25) is connected with a planter of the planting machine. By the adoption of the ribbed belt (2), the fan assembly of the air-aspiration type planting machine can change the speed in position at a time; furthermore, the ribbed belt (2) is difficult to slip, so that the transmission efficiency is improved; due to the additional arrangement of the unidirectional automatic clutch device, when a tractor is deaccelerated rapidly during working, the fan can still continuously run under the action of the inert, so that the slip abrasion of the belt is alleviated, and the stability of instant air pressure of the fan is improved; the negative pressure stabilizer (11) is designed in order to realize the stable and high-efficiency planting, so that the fan can be greatly improved during running.

A wear resistant, heat resistant conveyor chain comprising a series of links, each having a heat resistant roller rotatably fitted onto a bush between inner plates. The links are interconnected in the longitudinal direction of the chain by outer plates, and connecting pins rotatably inserted into the bush. A wear resistant, heat resistant sleeve-shaped spacer protrudes beyond the end surfaces of the heat resistant rollers toward the right and left inner plates to eliminate any sliding contact between the end surface of the heat resistant roller and the inner side surface of the inner plate.

An electrical connector connecting a male connector and a female connector in a freely engageable and detachable manner includes, a male tab is provided at the male connector; a housing part where the male tab is inserted is provided at the female connector; a contact piece and a beat piece to hold and press the male tab to enable electrical connection are provided at the housing part; and a protrusion is provided at least at one of the contact piece and the beat piece, and a recessed part capable of accepting the protrusion is provided at the male tab, wherein the contact piece, the beat piece, and the protrusion are constituted to be one component.

The invention discloses a bearing reducer center wheel shell in the field of machine transmission. The bearing reducer center wheel shell comprises a cylindrical side plate, the upper portion of the inner wall of the side plate stretches inward to form a ring-shaped upper end plate, the lower portion of the outer wall of the side plate stretches outward to form a ring-shaped lower end plate, the top of the upper end plate is provided with a plurality of installation holes in the peripheral direction, the inner side wall of the upper end plate is provided with a plurality of vertical slots evenly formed in the peripheral direction, the tops of the slots are connected with the top of the upper end plate, the bottoms of the slots are connected with the bottom of the upper end plate, the section outline of each slot is in an arc shape, smooth transition is formed between every two adjacent slots, and the section outline of the side wall of the upper end plate is a ring-shaped track in a curtate epicycloid shape. By means of the bearing reducer center wheel shell, a bearing reducer has the advantages of being small in radial load, high in transmission ratio, uniform in load distribution, low in noise, low in abrasion, long in service life and high in carrying capacity.

The invention belongs to the field of automobile transmissions and particularly relates to a manual transmission interlock cage and a manual transmission. The interlock cage is provided with a limiting slot or limiting hole in the top, the limiting slot or limiting hole is elongated, the length direction of the limiting slot or limiting hole is consistent with the axial direction of shifting shaft through holes, the length of the limiting slot or limiting hole is greater than or equal to a selection travel of a shifting head, and a limiting block arranged on a shifting mechanism case and capable of relatively moving in the limiting slot or limiting hole along the length direction of the limiting slot or limiting hole is extended into the limiting slot or limiting hole. The limiting slot or limiting hole and the limiting block have high machining precision and high strength and hardness, a fitting clearance between the limiting slot or limiting hole and a limiting pin is small, and the limiting pin experiences small sliding loss in the limiting slot or limiting hole; therefore, it is ensured that the interlock cage may be kept vertical constantly, and it is avoided that excessive manual shifting force leads to damage of the shifting mechanism case and affects the gear interlocking function.

The oscillation actuator of the invention uses ultrasonic vibrations generated in a stator to rotate a rotor, and a pre-load member causes a 30 MPa contact pressure between the rotor and the stator. Furthermore, a supply body impregnated with oil is provided inside a recess section in the stator, such that the contact section between the rotor and the stator is lubricated by oil supplied from the supply body. As the oil with which the supply body is impregnated, a fluorine-based oil having a kinetic viscosity at 40° C. of VG 400 according to the ISO viscosity classification is selected.

The invention provides a shoulder joint motion range measuring device. The shoulder joint motion range measuring device comprises a support, a shoulder measuring assembly and a stopping mechanism. The support comprises a stand column extending in the vertical direction. The shoulder measuring assembly comprises a fixed disc installed on the stand column and a movable disc rotatably installed in the fixed disc; the movable disc comprises a shell with an inner cavity, and a shoulder joint movable arm is hinged to the shell; the stopping mechanism is arranged in the inner cavity of the shell and comprises a circular ring structure with a notch, and a stopping layer is arranged on the outer side of the circular ring structure. When the head end and the tail end of the circular ring structure can abut against each other, the whole circular ring structure is subjected to compression force, and the stopping layer is far away from the inner wall of the shell; and when the head end and the tail end of the circular ring structure move separately, the whole circular ring structure is subjected to drawing force, the stopping layer presses the inner wall of the shell, and stopping of the movable disc is achieved. According to the invention, the movable disc is fixed through the stop mechanism, so that distortion of measured data caused by shaking generated when a patient maintains actions does not need to be worried, and measurement errors are effectively reduced.

The invention belongs to the technical field of mechanical cooperation, and particularly relates to a sliding assembly and an air treatment device. The invention aims at solving the problem that the friction force of the sliding assembly with the sliding path being a nonlinear line and a non-large-radian arc line is large. According to the sliding assembly and the air treatment device, the sliding assembly comprises a base, a sliding part and balls, wherein the base is in sliding connection with the sliding part, a first sliding plane on the base and a second sliding plane on the sliding part are oppositely arranged, installing holes corresponding to the balls are formed in the second sliding plane, the balls are installed in the installing holes, the balls abut against the first sliding plane and the sliding part, the balls enable the second sliding plane and the first sliding plane to be spaced to form a clearance space, and the first sliding plane and the second sliding plane are in sliding fit through the balls. The air treatment device comprises the sliding assembly. Through arrangement, the friction force of the sliding assembly of which the sliding path is a non-straight line and a non-large-radian arc line can be reduced, the sliding wear is reduced, and the sliding stability is improved.

One or more embodiments of the invention provide a cable insulation damage detection device. The device comprises a detection body, used for sleeving on a cable. Grooves are uniformly formed in the inner side wall of the detection body along the circumferential direction at intervals. A first metal contact piece is arranged between every two adjacent grooves. One end of the elastic rod is insertedinto the groove, and a spring is fixedly connected to the connecting rod, the other end abuts against the outer side wall of the cable, to compress the spring. Therefore, the second metal contact piece contacts and is communicated with the first metal contact piece. The loop is conducted, and the motor is triggered to drive the walking wheels to rotate, to drive the detection body to walk. The other side, far away from the wheel carrier, of the detection body clings to the outer side wall of the cable through a pressing plate, opposite friction force is provided through the walking wheel andthe pressing plate, so that the elastic rod is pushed by the spring to slidably extend into the insulation damage, the second metal contact piece is moved away from the first metal contact piece to disconnect the loop so as to stop detection, and automatic and comprehensive insulation damage detection is realized.

A moving apparatus includes a moving member configured to reciprocate along a first direction, a guide configured to contact a sliding portion of the moving member via a lubricant and to guide a movement of the moving member, and a structure configured to restrain the lubricant applied to the guide from being squeezed out of a sliding region of the guide, where the guide contacts the sliding portion, in a second direction orthogonal to the first direction utilizing the movement of the moving member.

The invention provides a method for a laser preparation of a titanium nitride gradient coating on a surface of titanium and titanium alloy. The method comprises the steps of performing surface cleaning treatment, surface blackening treatment and preheating treatment for a workpiece subatrate; and then carrying out laser nitriding treatment. The method is characterized in that the laser nitriding treatment is performed in a condition of filling reaction gas, and simultaneously laser scanning treatment and ultrasonic oscillating treatment for the surface of the workpiece subatrate are carried out. The titanium nitride gradient coating with a thickness of 50-200 [mu]m is obtained on the surface of the titanium and titanium alloy. The titanium nitride gradient coating is mainly composed of a nitride layer and a nitrogen diffusion layer, and has uniform transition of the coating microstructure. The surface hardness, wear resistance and corrosion resistance of the titanium nitride gradient coating are improved significantly than those of the matrix. Also, problems that crack are easy to produce, surface roughness is large, and the crystal grains of dendrite crystals of a nitride layer are coarse, in ordinary laser gas nitriding processes, are solved.