30results about How to "Improve partial wear" patented technology

Wet performance and partial wear resistance of a tire are improved, and a noise generated during running of the tire is reduced.

At a tread portion 2, a plurality of land portions 20, 30, and 40 is defined by circumferential main grooves 10 and 11 extending in a zig-zag manner in a tire circumferential direction. In the center land portion 20 and the second land portion 30, a plurality of hexagonal blocks 21B, 22B, 23B, and 30B is provided, each gradually expanding to the both sides in the tire width direction from the both end portions in the tire circumferential direction toward the center. In the center land portion 20, the plurality of hexagonal blocks 21B, 22B, and 23B is arranged so as to be brought close to each other in the tire width direction while sandwiching a circumferential thin groove 24 extending in a zig-zag manner in the tire circumferential direction and to be defined by lug grooves 25, 26, and 27 in the tire circumferential direction. In the second land portion 30, the plurality of hexagonal blocks 30B is arranged so as to continue in the tire circumferential direction while sandwiching a sipe 31, and formed in a rib shape continuous in a ground-contacting surface.

A process for preparation of milled cocoa shell including grinding cocoa shell in a single unit operation in a short-duration manner without the need for moving mechanical parts. The milled cocoa shell product obtained from the grinding treatment has reduced heat degradation and avoids equipment maintenance concerns otherwise associated with mechanical milling of the cocoa shells while providing an edible granular product useful for food manufacture such as chocolate food production.

There is provided a fuel gas supply device for a gas engine in which a fuel gas flows along the axial direction on the outer circumferential side of an inlet valve rod, and is supplied to an inlet path in a cylinder head. The device is characterized in that fuel gas injection holes to be opened and closed with the movement of a projection are provided in the inner circumferential surface of a sleeve into which the projection is slidably fitted, the projection being provided at the inlet valve rod, having a larger outer diameter than the inlet valve rod and having a portion concentric with and in parallel with the inlet valve rod, and in that the fuel gas injection holes are each formed in an ellipse, and the opening upper and lower end region part of the ellipse is situated within the movement region of the projection.

A belt type continuous variable transmission comprises a primary sheave, a secondary sheave, and a belt. The primary sheave comprises a first sheave body, a second sheave body that forms between it and the first sheave body a belt groove, about which a belt is entrained, a plurality of push bodies that slide the second sheave body according to centrifugal forces to change a width of the belt groove, and a plurality of stoppers that restrict movements of the push bodies by contacting with outer surfaces of the push bodies when the second sheave body reaches a position of minimum transmission gear ratio, in which the belt groove is made smallest in width. The stoppers are shaped to accelerate partial wear of the outer surfaces of the push bodies.

The invention belongs to the technical field of friction braking, and particularly relates to a high-speed train brake pad for optimizing friction particle combination and installation modes. The problems of simplex shape of friction particles, eccentric wear, high braking noise and non-uniform heat distribution on a brake interface of an existing brake pad are solved. The technical scheme is as follows: the idea of combining friction particles of different shapes and materials is put forward, and the advantages of the friction particles of various shapes and materials are comprehensively utilized by flexibly arranging the friction particles of various shapes and materials in different areas; a fixing mode of the friction particles is optimized; and an anti-rotation mode of the friction particles is optimized, and a guide shaft and a mounting hole are optimized to be cylinders with a non-circular section shape. The advantages of the friction particles of different shapes and materialsare organically combined, and the reliability, safety and comfortableness of a brake system are improved.

A tread surface the tire rotational direction of which is specified in one direction has a center region and shoulder regions on both sides of the center region. Blocks are defined in at least one of the shoulder regions by at least one first circumferential groove which extends in a circumferential direction of the tire, and first lateral grooves which extend in a widthwise direction of the tire and are disposed at predetermined intervals in the tire circumferential direction. Each block includes a tire rotational direction side groove wall surface having an inclination angle alpha , and a tire reverse rotation direction side groove wall surface having an inclination angle beta , and the inclination angle beta is greater than the inclination angle alpha . Each block has a tire rotational direction side edge portion which is chamfered.

The present invention discloses a cross slip ring which is arranged between a movable scroll plate and an upper bracket to support the floating of the movable scroll plate. A rolling friction mechanism is assembled on a fitting surface f the cross slip ring, the movable scroll plate and the upper bracket, so that the friction loss between parts is reduced. The rolling friction mechanism can reduce the friction loss between the cross slip ring and the movable scroll plate through a mode of the rolling friction instead of the sliding friction by specifically assembling a ball on an end face where the cross slip ring is cooperated with the movable scroll plate. The ball is instead of the end face of the cross slip ring, and processing procedures are reduced. The structure of the scheme is simple and the assembling is easy. The invention also discloses a scroll compressor using the cross slip ring. The friction between the cross slip ring and the movable scroll plate and the upper bracket is effectively reduced. The contact friction mode between the parts is changed, and the friction loss between the parts is reduced.

A hub embedded vortex compressor is disclosed. The second spiral vortex circles extended from end plate is mutually inserted with the first ones on the non-revolving vortex part. The revolving vortexpart is driven by crankshaft to revolve relatively to the non-revolving one. A rotation preventer is composed of said revolving vortex part and cross coupling. A hub integrated with the second spiralvortex circle is embedded in the cavity of non-revolving vortex part. It can greatly decrease the tilt force moment generated by acting on the fluid in working cavity, so improving the stress condition of bearing on crankshaft and sealing condition of end face.

The embodiment of the invention provides a shaft sleeve pressing system and a sleeve pressing machine, relates to the technical field of shaft sleeve installation, and aims at solving the problem thatin the existing operation that a shaft sleeve is pressed into a shaft sleeve hole, shaft sleeve playing or shaft sleeve interference is likely to happen. The shaft sleeve pressing system comprises athree-position four-way valve, a sleeve pressing oil cylinder and a first branch. A pressure sensor is arranged on the first branch, a controller is used for receiving pressure signals which representthe oil pressure value and are sent by the pressure sensor, and the three-position four-way valve is in any state of the right position and the middle position. When the three-position four-way valveis located at the right position and oil enters a rod cavity of the sleeve pressing oil cylinder, the shaft sleeve is pressed in the shaft sleeve hole, the pressure sensor detects the oil inlet oil pressure of the rod cavity of the sleeve pressing oil cylinder, and when the oil pressure value is in the reasonable range, the controller controls the three-position four-way valve to be continuouslylocated at the right position, the shaft sleeve is continuously pressed in the shaft sleeve hole. When the oil pressure value exceeds the reasonable range, it is shown that the shaft sleeve and the shaft sleeve hole are not matched, the controller controls the three-position four-way valve to be located at the middle position, continuous pressing of the shaft sleeve into the shaft sleeve hole is stopped, and the fool-proof function is achieved.

The invention discloses an exhaust brake valve for an engine. The exhaust brake valve for the engine comprises a control cylinder, a supporting plate, a valve body, and a cover; a piston push rod of the control cylinder is connected to a first valve plate and a second valve plate in the valve body through a control mechanism; the control mechanism comprises a first connecting rod, a second connecting rod, a first rotating shaft, and a second rotating shaft, wherein the first rotating shaft and the second rotating shaft are symmetrically arranged relative to the piston push rod; a first rockerarm is installed on the first rotating shaft, the first rocker arm is connected to the first connecting rod through a first movable pin, the first connecting rod is connected to the piston push rod, and the first rotating shaft is connected to the first valve plate; a second rocker arm is installed on the second rotating shaft, the second rocker arm is connected to the second connecting rod through a second movable pin, the second connecting rod is connected to the piston push rod, and the second rotating shaft is connected to the second valve plate; and a leaf spring is arranged on the side edge of the first connecting rod. According to the exhaust brake valve for the engine, the problems of failure of the control mechanism and eccentric grinding and jamming of the piston push rod are effectively solved, operation is simple and convenient, reliability is high, and the sealing performance is good.

The invention discloses an ultra-low section all-steel radial giant tire, and relates to the field of tire manufacturing, the ultra-low section all-steel radial giant tire comprises a tire body integrally formed with a hub, the tire body comprises an airtight layer, a tire body layer, a steel wire cord layer, a belted layer, a tire tread and a tire sidewall which are sequentially distributed from inside to outside, and a tire shoulder of an arc-shaped structure is formed between the tire tread and the tire sidewall; and the crown arc of the tire shoulder adopts a bionic cat claw palm pad structure design. The tire shoulder with the arc-shaped structure is formed between the tire tread and the tire side wall, the tire crown arc of the tire shoulder adopts the bionic cat-claw palm pad structure design, and the cat-claw palm pad arc curve fitting is carried out by utilizing the similar principle and is applied to the tire crown design, so that the ground contact area of the tire can be effectively increased, the tire eccentric wear phenomenon is improved, and the service life of the tire is prolonged. And the cooperative improvement of the tire ground gripping performance and the wear performance is achieved.

The present invention provides a kind of spherical lens grinding apparatus improved from a kind of common lens grinding apparatus. The solving method provides the spherical tool tray with the function which can compress the under-processing lens in the direction of the axis through the center of the spherical tool tray and the capacity which can move in the direction parallel with the above-mentioned axis. The spherical oscillating body which can oscillate freely supports the above-mentioned tool tray with free rotation and has the same center with the tool tray. The above-mentioned oscillating body is supported by the spherical air bearings which has the same center with the above-mentioned tool tray. The lens grinding apparatus also provides the stop-rotation component in the axis parallel with the surface which the above-mentioned oscillating body and tool tray rotate on and through the sphere center of the above-mentioned tool tray. The center-adjusting mechanism for oscillating angle adopts the arched cam to set the center of oscillating angle.

The invention provides a valve, an air cylinder, a compressor and an air conditioner, and relates to the technical field of air conditioners. The technical problem that in the prior art, a compressorpump body only allows a roller to rotate in a single direction to realize air suction and exhaust operation of the air cylinder can be solved. The device comprises a first plug body (10) and a secondplug body (11), the second plug body (11) is arranged in the first plug body (10), and the second plug body (11) can be matched with the first plug body (10) at an air suction port and an air exhaustport of the air cylinder to form a channel for air to enter or be exhausted out of the air cylinder. The valve can work in two directions to alternately form an air inlet channel and an exhaust channel of the air cylinder, so that the air cylinder allows the roller to rotate in two directions to achieve air suction and exhaust operation, the single-direction working mode of the air cylinder is changed, and the two-direction rotating working mode of the roller in the air cylinder is achieved.

The embodiment of the invention provides a ring gear structure and a planetary gear transmission device, and relates to the technical field of mechanical equipment. The ring gear structure provided bythe embodiment of the invention includes a first-class ring gear and a second-class ring gear, the first-class ring gear is used for meshing with a first-class planetary gear, and the second-class gear ring is used for meshing with a second-class planetary gear. The first stage ring gear and the second stage ring gear are actively connected with each other, and a gap is formed between the first-class ring gear and the second-class ring gear. Therefore, in the process of use, the second-class ring gear can float relative to the first-class ring gear, correspondingly, the first-class ring gearcan float relative to the second-class ring gear, that is, the first stage ring gear and the second stage ring gear can be relatively independent floating by separately arranging the first stage ringgear and the second stage ring gear. At the same time, floating effect is achieved, and uniform load effect is good. Noise is reduced, eccentric wear phenomenon is reduced, and then use effect is improved.