30results about How to "Consistent torque" patented technology

The invention discloses an electric screw driver, which comprises a handle casing, a handle cap, a motor, a control circuit, a speed reduction torsion changing box, a spindle and a screwdriver bit, wherein the motor, the control circuit, the speed reduction torsion changing box and the spindle are all arranged in the handle casing; the spindle penetrates through the handle cap and is connected with the screwdriver bit; the speed reduction torsion changing box comprises a box body, ejector rods, an ejector ring, a pressing ring, a torsion spring, a torsion base, a torsion adjusting sleeve, a locking sleeve, a locking sleeve spring, an annular gear and planet gear assemblies; two pin rollers arranged on the front end surface of the annular gear are tangent to semicircular concave surfaces arranged on the ejector rods. The electric screw driver is simple in structure, easy to assemble and maintain and highly practical; the torsion can be adjusted freely, and is constant and accurate; the mains supply is directly used for work, so the electric screw driver is suitable for an assembly line and various maintaining and mounting occasions.

A rotating structure of a lamp holder of a track lamp is characterized by comprising a shaft sleeve, a connecting shaft, a first stopping disc, a stopping gasket and a locking nut. The shaft sleeve is fixedly and penetratingly arranged on a side wall of the lamp holder; one end of the connecting shaft is rotatably inserted in the shaft sleeve, and the other end of the connecting shaft is fixedly connected onto a support of the track lamp; the first stopping disc is fixedly connected onto a first opening end of the shaft sleeve extending into the lamp holder; the stopping gasket is sleeved at one end of the connecting shaft and is fixedly connected with the connecting shaft, and one end of the stopping gasket is in rotatable contact with the first stopping disc; and the locking nut is sleeved at one end of the connecting shaft and is abutted to the other end of the stopping gasket. Compared with the prior art, the rotating structure is good in concealment, and the integral appearance of the lamp cannot be destroyed; the lamp holder can rotate continuously and smoothly, torsion is consistent, and the problem of jamming is avoided; the lamp holder is in close contact with the support, and wearing and loosening are avoided after the lamp holder rotates by multiple times; and the integral rotating structure is simple and is high in manufacturability and easy to assemble.

A torque overload clutch for an electrical power tool, such as a percussion hammer drill, is provided. The clutch is accommodated in a cavity in a gear cog. Spring washers are used to urge ball bearings into indentations formed in the base of the cavity. The ball bearings are accommodated in cavities formed in a drive plate which engages with the spindle drive of the power tool. The spring washers are held in position by a circlip or a threaded plate. The threaded plate arrangement provides means for compressing the spring washers with a consistent force across a manufactured batch. A method of manufacturing the clutch is also disclosed.

The invention discloses a double-end rotating die holder of a wire drawing machine. The double-end rotating die holder comprises a frame, wire drawing dies, die cooling mechanisms, rotating thread rolling cylinders and thread rolling cylinder supports; two groups of wire drawing dies are fixed in parallel on the frame; each die cooling mechanism is arranged on one end of each corresponding wire drawing die, while each rotating thread rolling cylinder is arranged on the other end of the wire drawing die and rotatably arranged on each corresponding thread rolling cylinder support; a through hole for a drawn wire to pass through is formed in an axial direction in each rotating thread rolling cylinder; an inner diameter of one end, connected with the corresponding wire drawing die, of the through hole is matched with an inner diameter of a discharge hole of the wire drawing die, and the other end of the through hole of the rotating thread rolling cylinder serves as a direct flow channel that is gradually increased in diameter in the axial direction and used for discharging wire drawing ash; further, two groups of rotating thread rolling cylinders are driven by an external driving mechanism to rotate in the same direction. The double-end rotating die holder of the wire drawing machine has the advantage that the rotating thread rolling cylinders are arranged on rear sides of the wire drawing dies to perform rotating flat-grinding on the surface of a drawn wire, thereby ensuring the smoothness of the surface of the drawn wire.

A method for controlling the air-fuel ratio of an internal combustion engine operating with alternating intake valves is presented, comprising: operating at least one cylinder of the internal combustion engine with a first inlet port and a second inlet port; operating the first inlet port and the second inlet port in the during an alternating cylinder cycle; and adjusting the timing of the first inlet port or the second inlet port in response to the air intake of the cylinder sucked into the cylinder, wherein the air intake of the cylinder is sucked during the cylinder cycle of the cylinder, and the cylinder circulation generates before the adjusted timing is used for the cylinder. According to the method, the air-fuel ratio of the internal combustion engine is adjusted through changing valve timing or fuel timing during the cylinder cycle. The inventive method reduces discharge of the engine.

The invention discloses a rail wheel synchronous control device for a traction power test device of a rail transit vehicle. An accompanying test motor is connected to one side of each rail wheel; a sensor is arranged between each rail wheel and an output shaft of each accompanying test motor; an accompanying test converter is connected to each accompanying test motor and is connected with a signal acquisition control unit arranged on the field; the signal acquisition control units are one or more circuit boards or circuit units arranged inside the accompanying test converters or signal acquisition controllers arranged outside the accompanying test converters; and the signal acquisition control units are used for receiving control signals from the sensors and / or other signal acquisition control units, and the control signals are integrally processed and then are outputted to the accompanying test converters. Dynamic work conditions of various motors are acquired on field in real time and are integrally processed by the signal acquisition control units for controlling various accompanying test converters, so that output rotating speeds and the torques of all motors can be enabled to be same, traction and brake work conditions of tested locomotives can be dynamically adapted and the synchronous control on the rail wheels can be realized more accurately.

The present application relates to systems and methods for adjusting intake manifold pressure. Systems and methods are presented for operating an engine with deactivated and non-deactivated valves. In one example, the position of an engine intake throttle is adjusted during cylinder deactivation to control intake manifold pressure for cylinder reactivation. Throttle closing may be timed based on the actual number of cylinder induction events expected to provide a desired engine intake manifold pressure.

The invention provides a locking device of threaded fasteners. The locking device comprises a grasping mechanism and a tightening shaft; the grasping mechanism is used for grasping the threaded fasteners; the tightening shaft can lock the threaded fasteners grasped by the grasping mechanism in a to-be-mounted part. The tightening shaft comprises a rotating shaft and a motor which is connected with the rotating shaft and drives the rotating shaft to rotate. The output end of the rotating shaft is connected with the grasping mechanism. The locking device of the threaded fasteners is provided with the grasping mechanism for grasping the threaded fasteners; the grasping mechanism is connected with the output end of the tightening shaft, and therefore the threaded fasteners are locked through the tightening shaft; according to the characteristics of the tightening shaft, the threaded fasteners are locked through the tightening shaft, and the threaded fasteners do not need to be manually locked. Compared with the prior art that the threaded fasteners are locked in batches through manual operation, obviously, manual locking is replaced, and manual labor intensity is reduced.