91results about How to "Avoid abnormal wear and tear" patented technology

The invention relates to a tire tread (B) provided with a tread design formed of a number of relief elements (1, 10) delimited by grooves and / or incisions (2). This tread design comprises, on each of its sides, i.e. the axially outermost area of the tread, a circumferentially oriented edge rib (1) that is axially delimited on the inside by a groove (2) having the same general orientation and depth H. The tire tread also comprises, axially on the exterior of each edge rib (1), a rib (3) that is offset with regard to the outer contact surface (11) of the adjacent edge rib (1) by a distance d that is not equal to zero. Said offset rib (3) is separated from the edge rib (1) by a groove (4) of the same depth or nearly the depth H of groove (2) delimiting the edge rib (1). The tire tread is characterized in that it comprises, on each side where an offset rib (3) is formed, a number of channels (5) that open on the lateral faces of the tread. These channels (5) extend inside the tread until they open into the groove (4) between the offset rib (3) of the adjacent edge rib (1).

The invention discloses a transmission mechanism with an intermittent output action, which comprises a conjugate cam group, an output shaft, two rocker arm blocks, a transmission connecting rod group and an input shaft, wherein the conjugate cam group comprises two cams; the output shaft is pivoted in the center of the base circle of the two cams and is provided with a sun gear; the two rocker arm blocks are provided with a planetary gear respectively; the two planetary gears are engaged with the sun gear; one rocker arm block is pivoted with two rollers; the two rollers are contacted with the two cams respectively; the transmission connecting rod group is arranged between the two rocker arm blocks to make the two rocker arm blocks actuated synchronously; the input shaft and the output shaft are positioned on the same common axis; and the input shaft is used for driving the two rocker arm blocks to rotate through a planet carrier. Therefore, the stress of the sun gear is uniformly dispersed on the engaged sides of the two planetary gears, so that the dynamic balance of a device can be achieved and the mechanism can be applied to high-speed occasions.

A paper roll slitter machine comprises a framework, a band saw machine, an intermittent paper feeding mechanism, a main driving mechanism and a control device. The intermittent paper feeding mechanism is arranged on the framework in such a manner that the intermittent paper feeding mechanism can longitudinally and horizontally slide, the main driving mechanism is arranged on the framework, is connected with the intermittent paper feeding mechanism and can drive the intermittent paper feeding mechanism to longitudinally and horizontally reciprocate, and the control device is respectively connected with the intermittent paper feeding mechanism, the band saw machine and the main driving mechanism; the intermittent paper feeding mechanism comprises a slide base, a groove and a belt pushing mechanism, the slide base is arranged on the framework in such a manner that the slide base can longitudinally and horizontally slide, the groove is transversely and horizontally arranged on the slide base and is used for accommodating a paper roll, and the belt pushing mechanism is transversely and horizontally arranged on the slide base and is used for intermittently pushing the paper roll in the groove to move forwards; the main driving mechanism comprises a transmission shaft, two crank and slider mechanisms and a second motor, the transmission shaft is transversely and horizontally arranged on the framework, the two crank and slider mechanisms are connected among two ends of the transmission shaft and the slide base, and the second motor is connected with the transmission shaft by a speed reducer and can drive the transmission shaft to rotate via the speed reducer; and a saw blade penetrates through the groove in an output section of the groove and can cut the paper roll when the intermittent paper feeding mechanism slides.

The invention discloses a shield tunneling construction method of a composite stratum; the method includes step 1, geological survey of composite stratum; step 2, selection of a shielding cutter according to the geological condition of the composite stratum; step 3, selection of shield tunneling construction mode according to the geological condition of the composite stratum; step 4, selection of shield tunneling parameter according to the geological condition of the composite stratum, wherein the step 4 includes step 401 of calculating push force of a shield tunneling machine; step 402 of calculating torque of the shield tunneling machine; step 5, shield tunneling construction, wherein the step 5 includes step 501 of feeding back the shield tunneling direction; step 502 of adjusting the shield tunneling direction. The shield tunneling construction method is simple in structure and reasonable in design; according to the change of the composite stratum, the method can reasonably select the shield tunneling machine, correctly select the tunneling parameter, prolong the service life of a cutter disk, improve the adaptation of the cutter disk to the composite stratum, and guarantee the safe, rapid and economic performance of the shield construction; thus the method is good in using effect and convenient to popularize and use.

The invention relates to the automobile suspension technology, and specifically discloses a device convenient for adjusting the automobile suspension axle distance. The device comprises a support plate and a fixed-length pull rod, wherein the support plate is fixed on an automobile frame girder; one end of the pull rod is articulated with an automobile axle in fixed connection with an elastic element; the other end of the pull rod is mounted on the support plate through a pull rod connecting piece; the support plate is provided with a horizontal strip support plate through hole for supporting the pull rod connecting piece; an adjusting plate is arranged in the position corresponding to the support plate through hole, and is provided with an adjusting plate guide part in an inclination angle with the horizontal direction; and when the adjusting plate guide part moves up and down on the adjusting plate relative to the support plate, the pull rod connecting piece moves horizontally in the support plate through hole. Through the invention, the axle distance and parallelism can be conveniently adjusted in the automobile assembly or using process so as to prevent abnormal abrasion of automobile tyres and improve the driving safety.