31results about How to "Improve partial wear" patented technology

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 provides a pneumatic radial tire having cost competition and improving the bias abrasion performance to the tire shoulder by seeking for the optimization of the ground shape and the ground pressure. The pneumatic radial tire has a translot (2) having a plurality of circumferential main slots (1a, 1b) at the tread portion of the tire and extending along the width direction of the tire and a tread pattern for forming a plurality of ground lines (4a, 4b). In the tier shoulder ground line (4b) comprising ground end (E), a translot (2) extending from the circumferential main slots (1b) nearest to the ground end to the ground end (E) is stopped near the ground end, and continuous ground portions (L) are formed near the ground end. Side of the main slots (1b) of the tier shoulder ground line (4b) is approximately parallel to the intermittent slit auxiliary slot (3).

The present invention has an object of providing a pneumatic tire having a tread pattern capable of providing both excellent drivability and a high partial wear resistance. The pneumatic tire of the present invention includes, in a tread surface, a compound groove partitioned into a first groove portion and a second groove portion by a first groove side and a second groove side, the first groove side having an oblique side portion diagonally disposed relative to a tire circumferential line in plan view, the second groove side intersecting with the oblique side portion of the first groove side at an acute angle in plan view, in which: the first groove portion and the second groove portion both have a groove depth that gradually reduces in an extending direction of the groove toward an intersection between the oblique side portion and the second groove side; and a groove wall extending from the first groove side is formed as a tapered surface mildly-sloped toward a groove bottom on the intersection side when viewed in the groove transverse direction. Further, the pneumatic tire of the present invention includes, in a tread surface, a groove partitioned by at least three groove sides in plan view, in which: one or more of groove walls extending from one of the at least three groove sides that extends in the longitudinal direction of the groove is formed as a tapered surface at least in part thereof; and the tapered surface forms an angle with a plane perpendicular to the tread surface, which varies in the extending direction of the groove side.

The invention discloses a simply supported beam type straddle type monorail vehicle biaxial power bogie, comprising a support frame and a running wheel assembly, the support frame is provided with a running wheel installation cavity, and the running wheel assembly is arranged on the running wheel In the installation cavity, the innovation is that the support frame and the running wheel assembly adopt a simply supported beam structure; the beneficial technical effect of the present invention is: a new simply supported beam type monorail vehicle bogie support structure is provided, which can effectively Improve the stress of the structure and solve the problem of tire eccentric wear.

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.

The invention relates to the technical field of brake calipers and in particular relates to a pair of eccentric only-pull structure type hydraulic brake calipers. The pair of eccentric only-pull structure type hydraulic brake calipers comprises a guide pin, a buffer sleeve, holding springs, an inner friction block, an outer friction block, an eccentric shell, a piston and an only-pull structure bracket. Two sides of the eccentric shell and the only-pull structure bracket are connected through the guide pin and the buffer sleeve, the eccentric shell and the outer friction block are connected through the holding spring, and the inner friction block and the piston are connected through the other holding spring. Compared with the prior art, the only-pull structure bracket with an outer beam isdesigned, so that the integral rigidity is improved, the machining stability is improved greatly, and the tolerance zone is reduced greatly, and therefore, more favorable support is provided to improve eccentric wear, noise and drag. The eccentric shell is matched with the only-pull structure bracket, so that the eccentric wear of a friction plate is reduced to the maximum extent, and low frequency and knock abnormal sound noises are improved. The drag, eccentric wear and noise conditions of the hydraulic brake calipers are also improved well.

The invention relates to a self-adaptive rear suspension control system and method for a vehicle. The system comprises a steering wheel steering angle sensor, a wheel speed sensor, an MCU processing module, an image acquisition module, a mode selection module, a micro electric steering pull rod motor and a power source; the steering wheel steering angle sensor, the wheel speed sensor, the image acquisition module, the mode selection module and the micro electric steering pull rod motor are in electric signal connection with the MCU processing module; the power source provides power for the whole control system. According to the technical scheme, on the basis of a multi-link rear suspension structure of the existing vehicle, a toe-in pull rod is replaced with a micro electric steering pullrod, and when the speed of the vehicle is high, the eccentric abrasion of tires is relieved by detecting the abrasion condition of the tires and adjusting the toe-in value of rear wheels; for the rear-drive or four-drive vehicle, when the vehicle is trapped, the angles of the rear wheels can be greatly changed, and the capability of the vehicle of getting out of a trap or steering is improved.

The invention discloses a sealing device used for a micro-miniature rotor engine, relates to a sealing device used for a micro-miniature rotor engine and adopting a combined type of leaf springs and sealing pieces and belongs to the field of micro-miniature rotor engines. The sealing device comprises the sealing pieces and the leaf springs; each leaf spring is in a shape of an arc; and the middle portions of the two ends in the up-down direction are provided with grooves used for being in clearance fit with rib plates. The top end of each sealing piece is in a shape of an arc; the middle portion of each sealing piece is rectangular; the upper end and the lower end of the back portion of each sealing piece are provided with convex tables preventing the leaf springs from moving; and the rib plates reducing the gas leakage area are machined in the middles of the back portions of the sealing pieces. The rib plates are in clearance fit with the grooves formed in the end portions of the leaf springs, and the grooves in the upper sides and the lower sides of the leaf springs can stride cross the two sides of each rib plate. During installation, the back portions of the leaf springs make contact with the portions of the bottoms of rotor sealing grooves, and the tops of the sealing pieces make contact with the inner wall of a cylinder. By means of the sealing device, the abrasion amount of the sealing pieces can be reduced, eccentric abrasion of the sealing pieces in the working process can be improved, the power and the service life of the micro-miniature rotor engine are improved, and installing is convenient.

The invention provides a pneumatic radial tire having cost competition and improving the bias abrasion performance to the tire shoulder by seeking for the optimization of the ground shape and the ground pressure. The pneumatic radial tire has a translot (2) having a plurality of circumferential main slots (1a, 1b) at the tread portion of the tire and extending along the width direction of the tire and a tread pattern for forming a plurality of ground lines (4a, 4b). In the tier shoulder ground line (4b) comprising ground end (E), a translot (2) extending from the circumferential main slots (1b) nearest to the ground end to the ground end (E) is stopped near the ground end, and continuous ground portions (L) are formed near the ground end. Side of the main slots (1b) of the tier shoulder ground line (4b) is approximately parallel to the intermittent slit auxiliary slot (3).

The invention relates to a compact brake clamp unit shell, and belongs to the technical field of rail transit. The shell is provided with a brake cylinder piston assembly mounting hole and a push rod assembly cavity communicated with one end of the mounting hole; the outer end of the push rod assembly cavity is a side cover mounting surface inclined to the axis of the mounting hole; one end, far away from the push rod assembly cavity, of the mounting hole is an end cover mounting surface; and one end of the side cover mounting surface is provided with a push rod assembly hinging structure. With the adoption of the invention, the positioning and movement precision of the push rod assembly can be fully ensured, and the adverse effect on the positioning and movement precision of the push rod assembly caused by vibration or looseness of fastening connection between the shell and the brake cylinder side cover is avoided; accurate and stable transmission of the required clearance adjustment amount during clamp braking is effectively guaranteed, and then the braking reliability and the operation safety are guaranteed. And the brake cylinder side cover can be conveniently disassembled, so that the action condition of each part in the shell can be conveniently checked, and great convenience is brought to detection and maintenance.

A control mechanism of an exhaust brake valve comprises a control cylinder, a supporting plate, a valve body, a rotary shaft, a rack, an idler shaft and a hood; one end of the rotary shaft is providedwith a gear in a sleeved mode, and the other end of the rotary shaft penetrates through the supporting plate and the valve body in sequence to be connected with a valve plate in the valve body; one end of the idler shaft is connected with the supporting plate, and an idler is arranged at the other end of the idler shaft; one end of the rack is connected with a piston push rod of the control cylinder, the other end of the rack is located between the rotary shaft and the idler shaft, and the rack is engaged with the gear and the idler; a roller support with a roller is installed on the lower end face of the rack; and a pressing plate is arranged above the rack, the end parts of the pressing plate are fixed to the rotary shaft and the idler shaft correspondingly, a spring and a ball are installed on the lower end face of the pressing plate, a groove is formed in the upper end face of the rack, and the ball is pressed in the groove through the spring. By means of the control mechanism ofthe exhaust brake valve, the problems that a control mechanism loses efficacy and a piston push rod is eccentrically worn and gets stuck can be effectively solved, and the control mechanism is long inservice life, high in reliability and good in smoothness.

A composite rigid body train line and its production method, which has a sliding contact rail sliding contact with collector shoe and a rail support for fixing the sliding contact rail which includes a central plate and a lateral plate bending ductility from two sides of the central plate, said rail support has a mounting slot embeded and riveted for fixing said lateral plate, the ratio W1 / W2 of the width W1 of the central plate and the width W2 of the lateral plate, is more than 3.0, the whole surface of the central plate is contacted with said rail support in width direction virtually, so the conjugation of the sliding contact rail and rail support is 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 invention relates to the technical field of brake calipers and in particular relates to a pair of eccentric only-pull structure type hydraulic brake calipers. The pair of eccentric only-pull structure type hydraulic brake calipers comprises a guide pin, a buffer sleeve, holding springs, an inner friction block, an outer friction block, an eccentric shell, a piston and an only-pull structure bracket. Two sides of the eccentric shell and the only-pull structure bracket are connected through the guide pin and the buffer sleeve, the eccentric shell and the outer friction block are connected through the holding spring, and the inner friction block and the piston are connected through the other holding spring. Compared with the prior art, the only-pull structure bracket with an outer beam isdesigned, so that the integral rigidity is improved, the machining stability is improved greatly, and the tolerance zone is reduced greatly, and therefore, more favorable support is provided to improve eccentric wear, noise and drag. The eccentric shell is matched with the only-pull structure bracket, so that the eccentric wear of a friction plate is reduced to the maximum extent, and low frequency and knock abnormal sound noises are improved. The drag, eccentric wear and noise conditions of the hydraulic brake calipers are also improved well.

The present invention has an object of providing a pneumatic tire having a tread pattern capable of providing both excellent drivability and a high partial wear resistance. The pneumatic tire of the present invention includes, in a tread surface, a compound groove partitioned into a first groove portion and a second groove portion by a first groove side and a second groove side, the first groove side having an oblique side portion diagonally disposed relative to a tire circumferential line in plan view, the second groove side intersecting with the oblique side portion of the first groove side at an acute angle in plan view, in which: the first groove portion and the second groove portion both have a groove depth that gradually reduces in an extending direction of the groove toward an intersection between the oblique side portion and the second groove side; and a groove wall extending from the first groove side is formed as a tapered surface mildly-sloped toward a groove bottom on the intersection side when viewed in the groove transverse direction. Further, the pneumatic tire of the present invention includes, in a tread surface, a groove partitioned by at least three groove sides in plan view, in which: one or more of groove walls extending from one of the at least three groove sides that extends in the longitudinal direction of the groove is formed as a tapered surface at least in part thereof; and the tapered surface forms an angle with a plane perpendicular to the tread surface, which varies in the extending direction of the groove side.