Abstract: The present disclosure discloses a gradient single-crystal positive electrode material, which has a chemical formula of LiNixCoyA1-x-yO2@mLiaZbOc, wherein 0<x<1, 0<y<1, 0<x+y<1, 0<m<0.05, 0.3<a?10, 1?b<4, and 1?c<15, A is at least one of Mn, Zr, Sr, Ba, W, Ti, Al, Mg, Y, and Nb, and Z is at least one of B, Al, Co, W, Ti, Zr, and Si. The atomic ratio of the content of Co on the surface of the single-crystal positive electrode material particle to the content of Ni+Co+A on the surface is greater than 0.4 and less than 0.8, and the atomic ratio of Co at a depth 10% of the radius from the surface of the single crystal positive electrode material particle is not less than 0.3; and the single-crystal positive electrode material particle has a roundness of greater than 0.4, and is free from sharp corners.

Abstract: A projection lamp, including a housing, a first light-emitting component, a driving component, and a film, wherein a light-transmitting sheet is provided on one side of the housing, the first light-emitting component comprises a lamp holder provided in the housing, a main control board fixed on the lamp holder, and a first light source mounted on the main control board, the first light source is arranged away from a central axis of the lamp holder, the driving component is in driving connection with the lamp holder so as to drive the lamp holder to rotate around the central axis of the lamp holder, and the film is arranged in the housing and positioned between the first light source and the light-transmitting sheet. The first light-emitting component further includes a condenser lens, and the condenser lens is sleeved on the first light source.

Abstract: A manual tweezer, including a main body, a first fixing base, a pushing member, a pull rod, and clamping arms, wherein the first fixing base is arranged on one side of the main body, and the pushing member is movably sleeved on the first fixing base to reciprocate relative to an axial direction of the first fixing base, and wherein the pull rod is respectively provided with a first end and a second end, the first end of the pull rod is fixedly connected to the pushing member, the second end of the pull rod is connected to the clamping arms, and the pushing member drives the pull rod to reciprocate along the axial direction of the first fixing base for driving the clamping arms to open and close. The manual tweezer further includes a silicone sleeve sleeved on the pushing member.

Abstract: The present disclosure provides a reciprocating plunger pump, which includes a plunger pump engine body, a plunger pump head and a slider crank mechanism which is located in the plunger pump engine body. Also disclosed are a reciprocating plunger pump engine body, a slider crank mechanism and a slide block, a bearing seat, a crankcase upper cover and a plunger seat.

Abstract: A crank circular slider mechanism includes a crankshaft having at least one crank pin; at least one circular slider with an eccentric hole which fits over the crank pin; at least one reciprocating element with a circular slider-receiving hole, which receives the circular slider in a rotatable manner; and at least one dynamic balance rotary block with an eccentric hole that fits over the crank pin. The dynamic balance rotary block and the adjacent circular slider are fixed together. By means of proper selection of a mounting place and a mass of the dynamic balance rotary block, the mechanism can convert reciprocating inertia of the reciprocating element into rotation inertia so as to obtain a balancing effect. An internal combustion engine and a compressor may be equipped with the crank circular slider mechanism.

Abstract: A crank circular slider mechanism that includes a multi-row reciprocating motion part and a one-row reciprocating part. The multi-row reciprocating motion part has a guiding part divided by a longitudinal groove into two rows parallel to each other, each of which has a hole for a circular slider. The one-row reciprocating motion part has a guiding part which can be inserted into the longitudinal groove of the multi-row reciprocating motion part along the thickness direction, so as to vertically traverse the multi-row reciprocating motion part. The guiding part of the one-row reciprocating motion part includes a hole receiving a middle circular slider. Two circular sliders are mounted in the same phase; the middle circular slider is sandwiched therebetween and is located with a 180 degree phase difference compared to them. Adjacent circular sliders are secured to each other.

Abstract: The present disclosure provides a reciprocating plunger pump, which includes a plunger pump engine body, a plunger pump head and a slide crank mechanism which is located in the plunger pump engine body Also disclosed are a reciprocating plunger pump engine body, a slider crank mechanism and a slide block, a bearing seat, a crankcase upper cover and a plunger seat.

Abstract: A single bell crank for a crankshaft of an internal combustion engine or a compressor includes a single bell crank main journal (5, 28, 39) and a crank pin (21, 31, 46), wherein the crank pin (21, 31, 46) is vertical to the single bell crank main journal (5, 28, 39) and extends out, the axis of the crank pin (21, 31, 46) is offset relative to that of the single bell crank main journal (5, 28, 39), the front end of the crank pin (21, 31, 46) is tapered, at least one first positioning half hole (10-1) is provided on the circumference of the end face of the tapered end (9) and can match with a second positioning half hole (10-02) in a crank to form a positioning pin hole.

Abstract: A V-type block of a crank circular slider mechanism, comprising a piston with a circular slider receiving hole and a circular slider received in the receiving hole, the block having a main journal hole and comprising a group of adjacent cylinders arranged in a V form intersecting in the position of the main journal hole, each of the cylinders in the group penetrating the main journal hole, wherein said cylinders each penetrate the main journal hole with an axial length beyond the main journal hole, which the length is long enough for providing a reciprocating range required for the reciprocating motion of the part of the piston located beneath the receiving hole of the circular slider.

Abstract: The invention provides a crank circular slider mechanism comprising multi-row reciprocating motion part and one-row reciprocating part: the multi-row reciprocating motion part has a guiding part which is divided by a longitudinal groove into two rows parallel to each other, respectively named by the first row of guiding section on which is provided a first hole receiving the circular slider; and the second row of guiding section on which is provided a second hole receiving the second circular slider, the one-row reciprocating motion part has a guiding part which can be inserted into the longitudinal groove of the multi-row reciprocating motion part along the thickness direction, so as to transverse vertically the multi-row reciprocating motion part, the guiding part is provided thereon with a hole receiving the middle circular slider, the first circular slider and the second circular slider are mounted in the same phase, the middle circular slider is sandwiched between the first circular slider and the second