7results about How to "Limit size" patented technology

A robotic wrist exoskeleton (1) includes a series of kinematic chains comprising a first base link member (10); a second link member (11); a third link member (12); a fourth link member (13); an end effector element (14) that can be grasped by a user's hand and associated with the fourth link member (13); and a first rotary joint (15) rotatably connecting the first link member (10) and the second link member (11) about a first rotation axis (21) arranged along the Z-axis of a first Cartesian reference three-axis coordinate system XYZ having a first three-axis coordinate system origin W. Two-link component (11); a second rotary joint (16) connecting the second link component (11) and the third link component (12) around a second rotation axis (22), the second rotation axis (22) being arranged along the Y' axis of the second Cartesian reference three-axis coordinate system XY'Z', the second reference three-axis coordinate system rotating in the YZ plane relative to the first reference three-axis coordinate system XYZ, wherein the Y' axis rotates relative to the Y axis by a first preset angle γ1; a third rotary joint (17) connecting the third link component (12) and the fourth link component around a third rotation axis (23). The rod component (13) has a third rotation axis (23) arranged along the X'' axis of the third Cartesian reference three-axis coordinate system X''Y'Z''. The third reference three-axis coordinate system rotates in the XZ' plane relative to the second reference three-axis coordinate system XY'Z', where the X'' axis rotates relative to the X axis by a second preset angle γ2. The first rotation axis (21), the second rotation axis (22), and the third rotation axis (23) all intersect at the axis origin W. The first rotary motor (31) and the first motion transmission connected to the first motor (31) and the first rotary joint (15) are also included. Motion (41); second rotary motor (32); third rotary motor (33); differential motion transmission (50) connects the second motor (32) and the third motor (33) in parallel to the second rotary joint (16) and the third rotary joint (17), so that the second motor (32) and the third motor (33) rotate in the same direction with equal speed and intensity, generating the rotation of the second rotary joint (16), and so that the second motor (32) and the third motor (33) rotate in opposite directions with equal speed and intensity, generating the rotation of the third rotary joint (17).

The application discloses a kind of TiO2@Au / TS-1 catalyst preparation and its application in preparation methyl methacrylate, belong to catalytic synthesis technical field.The application is titanium-silicon molecular sieve as carrier and gold are loaded, and TiO2 is modified on catalyst, the intervention of titanium oxide, gold particle is more stable, and it plays a protective role to gold particle, and the carrier TS-1 and gold particle are modified, the interaction between gold and TiO2 is regulated, the gold-based catalyst prepared is placed into reactor, and the mixed solution of methanol and methyl methacrylaldehyde with mass concentration of 45-80% is added, oxygen is introduced into the bottom of reactor, oxidation esterification reaction occurs at 70-160 DEG C, 0.5-2MPa, and methyl methacrylate is prepared.The efficient gold-based catalyst prepared by the application significantly improves the conversion rate of methyl methacrylaldehyde and the selectivity of methyl methacrylate.

The invention discloses a fault calculation scene setting method for analyzing the reliability of a protection system, and belongs to the technical field of power system relay protection. A primary equipment state set containing fault states of all primary equipment in a power grid and a secondary equipment state set combined by operation states of all secondary equipment of the power grid relay protection system are constructed, and then a fault calculation scene set used for analyzing the reliability of the protection system is obtained through combination. According to the method, the operation state of the secondary equipment of the power grid and the actual condition of the power grid are considered, a fault calculation scene set capable of comprehensively and truly reflecting the operation condition of the power grid is established, and all simulation scenes for evaluating the action behavior of the protection system under the specific fault working condition are included. The reliability of fault response of the protection system can be quantified through the action behavior result of the protection system in the preset fault calculation scene.

The application provides a charge pump circuit, wherein the circuit comprises a voltage output, four charge pump conversion modules, a square wave signal output module, a clock signal output module, a feedback control module and an output module; the four charge pump conversion modules are electrically connected in sequence; the first, second and third control terminals of any charge pump conversion module are electrically connected with the square wave signal output module and the clock signal output module; the first input terminal is electrically connected with the voltage output module or other charge pump conversion modules; the second output terminal is electrically connected with the feedback control module or grounded, or sequentially electrically connected with other charge pump conversion modules; the third input terminal is electrically connected with the feedback control module or other charge pump conversion modules; and the output module serves as the output terminal of the charge pump circuit. The charge pump circuit provided by the application can realize high-resolution voltage output and provide flexible programmable output voltage combination.

The present application relates to cable injection molding body machine head technical field, especially to high temperature flat small body machine head, including mould core and machine core, the mould core is equipped with mould cover, the machine core is equipped with main body, the mould core and the mould cover are equipped in the machine core, the centre position of the mould core and the mould cover is respectively provided with threading hole and discharge hole for conveying metal core wire, the mould core is provided with the stable line part including the load end seat and the magnetic suspension end, and the tight bundle part sprays plasticizing agent to the melt covered on the metal core wire through the high pressure cavity to smooth the surface. The present application sets up the buffer space, is helpful to solve the problem that needs to lengthen the machine head because of the uneven dispersion caused by the taper angle, can resist the high temperature of the machine head conduction, has no wear particle, and the nitrogen environment can blow the pollutants; so as to drive the deionized water or dilute silicon oil emulsion or UV curing agent in the high pressure cavity to spray the metal core wire covered with melt, plays the role of accelerating solidification, smoothing the surface and stabilizing the structure.

This invention relates to the field of iron core processing equipment technology, and discloses a machine and method for iron core processing production, including a material handling structure, an iron core unloading assembly, and a winding frame. The invention uses a winding frame to form a triangular structure, limiting frame deformation and swaying, and reducing material winding jamming and deviation. The material handling structure is equipped with multiple gripping modules, each connected to at least six detachable positioning pins. These positioning pins are distributed around the periphery of a single iron core to limit the iron core's sway, reducing material handling deviation and damage, and lowering component maintenance costs. The iron core unloading assembly includes a cylinder and a sliding plate, both with cavities. The sliding plate and cylinder slide horizontally relative to each other, connecting the cavities in the sliding plate and the cylinder. A top-loading cylinder drives a long top-loading rod to extend into the cylinder and push the iron core, enabling simultaneous unloading of multiple iron cores and improving mechanical unloading efficiency.

The utility model relates to the field of polishing and grinding equipment, in particular to a metal part polishing and grinding device. Comprising a supporting frame, a supporting plate is fixedly connected to the surface of the supporting frame, two positioning frame plates are installed on the surface of the supporting plate, an operation assembly is fixedly connected to the inner sides of the positioning frame plates, the arc surface of the operation assembly is sleeved with a conveying belt, and an output shaft is rotationally connected to the interior of the conveying belt; and the output shaft is rotationally connected with the interior of the operation assembly, the output end of the output shaft is rotationally connected with a motor assembly, and the motor assembly is fixedly connected with the surface of the supporting plate. According to the metal part polishing and grinding device, the problems that when metal parts are polished and ground, due to the fact that the metal parts are different in size, the metal parts are not prone to being rapidly fixed when being polished and ground, the parts are loosened when being polished and ground, and the metal parts cannot be fixed rapidly are solved. And the machining efficiency of the polishing and grinding equipment is further influenced.