71results about How to "Low driving torque" patented technology

The present invention provides a seat adjustment device for an aircraft or spacecraft, comprising:

a seat rail for connection to a floor; and

a seat connection for connection to at least one seat;

and a worm is provided which can be actuated to adjust the seat connection relative to the seat rail.

A control method of an induction motor suitable for an induction motor requiring a very large driving torque at the time of starting or acceleration of a textile machine, or the like, wherein a variable voltage variable frequency (VVVF) inverter (8) supplying power to the primary winding of the induction motor (9) increases its output voltage and output frequency after start while keeping the output current from the inverter lower than a specified current limit level, lowers only the output voltage of the VVVF inverter (8) down to a specified voltage set level after finishing acceleration of the induction motor (9), and then supplies an AC voltage corresponding to the frequency set level and the voltage set level continuously from the VVVF inverter (8) to the induction motor (9).

The invention discloses a triangular connecting rod-toggle rod transmission mechanism with a large force magnification ratio for a servo press. The mechanism comprises a servo motor, an upper pin shaft, an upper toggle rod, a triangular connecting rod, a crank, a middle pin shaft, a lower toggle rod, an unloading oil cylinder and an ejecting oil cylinder, wherein the output shaft of the servo motor is connected with the crank through a transmission mechanism; the crank is connected with the connecting rod; the connecting rod is connected with the upper toggle rod and the lower toggle rod respectively; the upper toggle rod is hinged and fixed on the machine body; the lower toggle rod is connected with a slider capable of linearly reciprocating up and down along a guide rail of the machine body through a wedged overload protection block and the unloading oil cylinder; the upper toggle rod and the lower toggle rod have different lengths and are asymmetric; and the connecting rod is triangular. As symmetric toggle rods are changed into asymmetric toggle rods, and a linear connecting rod is changed into the triangular connecting rod, a relatively large force magnification ratio is obtained, the drive torque required by the crank is remarkably reduced, and the capacity and cost of the servo motor are reduced under the condition of guaranteeing compact structure of the machine body, enough stroke of the slider and monotonous descending of the slider.

An image forming and recording apparatus, having a fixing apparatus for fixing unfixed toner image on a recording medium, wherein the fixing apparatus includes a fixing roller integrating a heater therein, an endless belt wound around the fixing roller, and three pressure members for pressing the endless belt onto the fixing roller. A pressure member located nearest to a side of entry of paper among the three pressure members is made up with a non-rotary type pressure member, and other two pressure members are made up with either one of a rotary type pressure member and the non-rotary type pressure member.

The invention discloses an arc track type virtual axis three-axis rotary table which comprises four parts including a direction real axis I part group, a rolling virtual axis II part group, a pitch virtual axis III part group and a stand, wherein the axial line of a direction real axis I is perpendicular to that of a rolling virtual axis II, and the axial line of the rolling virtual axis II is perpendicular to that of a pitch virtual axis III. Two virtual axes use arc tracks and rolling wheels to replace the traditional real axis rotation supporting system, so that serial movement connection is realized; by restraining the arc tracks by the rolling wheels, the arc tracks rotate around the corresponding virtual axes with a rack supporting structure together, so that movement of a rack is realized. Three-axis rotation of the rotary table is as follows: direction rotation is realized through a fixed vertical real axis; rolling rotation is realized through a first virtual axis; and pitching movement is realized through a second virtual axis. According to the arc track type virtual axis three-axis rotary table, circumferential rotation is realized by utilizing the arc tracks without adding counterweight, i.e. with balancing load, so that light weight of the rotary table is realized, the dynamic maneuvering performance of the rotary table is improved, and the loading ability and application places of the rotary table are expanded.

The invention discloses an indoor available comprehensive tubing string mechanics experiment platform to solve the problem of unable accurate synchronous application of pulling, pressing, bending, twisting and other loads of present indoor experiment devices. The platform integrates loading and test mechanisms of pulling, pressing, bending, twisting and other different loads, and eliminates mutual influences of pulling and twisting combination load in a bearing isolation manner, and a test terminal collects and processes a pulling and twisting load signal in a double-sensor merging output mode. The platform can realize synchronous loading and testing of pulling, bending, twisting and other loads, and allows the real deformation of an oilfield tubing string under a given load condition to be obtained through scaling all parts of the oilfield tubing string in the practical use process.

The invention discloses a double-pole bidirectional carrying robot based on a parallelism principle. The robot comprises a rotating disc. The side face of the rotating disc is provided with a rotating disc motor. A complete machine lifting assembly is arranged above the rotating disc. A base plate is fixedly arranged above the complete machine lifting assembly. One end of the base plate is provided with a bracket assembly. A swing arm and a control lever are hinged to the bracket assembly. The swing arm is driven by a longitudinally-rotating drive device to swing longitudinally around a longitudinal hinge point at the bottom of the swing arm. The swing arm is driven by a transversely-rotating drive device to swing transversely around a transverse hinge point at the bottom of the swing arm. The upper end of the swing arm is provided with a sucker claw. A control rod and the swing arm form a parallelogram hinge linkage rod structure in both the main vision direction and the side vision direction. The claw on the carrying robot can be kept in the horizontal state without additionally arranging a power mechanism for making a claw sucker be kept in the horizontal state, so that the cost is lowered, and power resources are saved.

The invention relates to a mechanical transmission device and particularly relates to an electronic sliding table. The electronic sliding table comprises a sliding table base, a guide rail is arranged on the sliding table base, a sliding fixation block structure, a front fixation block and a rear fixation block are arranged at the two ends of the sliding table base respectively, the rear fixation block is connected with a tail end fixation block, and a driving structure for driving the sliding fixation block structure to move is arranged in the tail end fixation block. The electronic sliding table has the advantages of being ingenious and simple in design, low in noise, wide in use range, convenient to mount, high in accuracy and acceptable to the majority of users.

The embodiment of the invention discloses a vehicle driving antiskid control method and related equipment. Slipping wheels and normal wheels in wheels on the same side of a vehicle are determined. Under the condition that the number of the slipping wheels in the wheels on the same side is smaller than the total number of the wheels on the same side, the driving torque of the slipping wheels is reduced till the slipping rate of the slipping wheels is within a first preset range, and the reduced driving torque of the slipping wheels is distributed to normal wheels in the wheels on the same side; the problem of wheel slipping can be solved, the total driving torque of wheels on the same side is maintained, the driving power of a vehicle is guaranteed, and the high-power requirement is met; meanwhile, the driving torques on the two sides of a vehicle can be kept symmetrical, the operation stability of the vehicle is effectively improved, and driving safety is guaranteed.

The invention relates to an over-temperature prevention control method and system. The control method comprises following steps: determining whether a driver's demand for vehicle power meets a set high power demand condition; if the set high power demand condition is met, determining whether the temperature of the motor or its controller is greater than a first temperature set value; if the temperature is greater than the first temperature set value, controlling to reduce vehicle drive torque to limit the temperature of the motor or its controller. In the present invention, when the driver's demand for vehicle power is large, if the temperature of the motor or its controller is higher than the set value, the drive torque of the vehicle is controlled to be reduced, which effectively prevents the danger of burning the motor since the temperature of the motor and controller rises rapidly due to the driver's stepping on the accelerator or stepping on the accelerator for too long in the case of excessive temperature of the motor and controller.

A wheel driving system includes a generator connected to an engine and configured to generate electrical energy, a front axle configured to drive a front wheel and including a front electric motor configured to produce a driving torque and a front transmission configured to convert the driving torque into a conversion torque and transmit the conversion torque to the front wheel via a front drive shaft, a rear axle configured to drive a rear wheel and including a rear electric motor configured to produce a driving torque and a rear transmission configured to convert the driving torque into a conversion torque and transmit the conversion torque to the rear wheel via a rear drive shaft, and a central connection unit operatively connected to the front drive shaft and the rear drive shaft and configured to transmit the conversion torque between the front axle and the rear axle.

The invention discloses a tunnel boring machine hammer type tunneling method and a trenchless tunnel boring machine applying the same. The method mainly comprises: a step 1, an impact hammer carries out tunneling for one propelling stroke to form a point tunneling region; a step 2, the impact hammer returns and changes tracks, and keeps on carrying out tunneling for one propelling stroke according to the step 1 to form a next point tunneling region which is overlapped with and connected to the point tunneling region in the previous step; a step 3, the step 2 is repeatedly completed for many times to form a plurality of point tunneling regions, the plurality of point tunneling regions are connected to form a first middle tunneling region; a step 4, the impact hammer changes tracks, and completes the steps 1, 2 and 3 in sequence to form a next middle tunneling region; and a step 5, the step 4 is repeatedly completed for many times to form a plurality of middle tunneling regions, and the plurality of middle tunneling regions are connected to complete surface tunneling work of a whole tunneling region. According to the method, frontal resistance can be reduced, and the structure of the whole tunneling system can be simplified.

The invention discloses an inward pushing directional type rotary steering drilling tool. The tool comprises a hollow outer shell body, a drill bit seat adjusting structure, a hydraulic driving mechanism and an adjusting mechanism, wherein, the drill bit seat adjusting structure is arranged in the outer shell body and comprises an adjusting rod, an adjusting ball seat, a supporting ball seat and an adjusting wedge block; the lower end of the adjusting rod is connected with a drill bit seat, the upper end of the adjusting rod is sleeved with the adjusting ball seat, and the adjusting wedge block is arranged outside the adjusting rod; the adjusting rod can rotate in the circumferential direction, and the supporting ball seat is used for providing a rotating fulcrum for the adjusting rod; the hydraulic driving mechanism comprises a central pipe, a servo hydraulic cylinder arranged on the periphery of the central pipe and a pressure-resistant hose arranged at the bottom end of the central pipe, and the pressure-resistant hose and the adjusting rod penetrate axially to form a drilling fluid channel; the bottom end of the servo hydraulic cylinder drives the adjusting wedge block to axially reciprocate through a pull rod so as to change the bending angle between the drill bit seat and the outer shell body and the direction of the drill bit seat; and the adjusting mechanism is used for controlling the axial movement and displacement of the hydraulic driving mechanism. According to the inward pushing directional type rotary steering drilling tool, the deflecting force of a drill bit can be improved, the stability in the drilling process is improved, and the adjusting process is reliable and stable.

The invention discloses a dual drive toggle rod mechanism for a servo mechanical press and an optimization method. The technical scheme is that an upper toggle rod part comprises a first crank, a first connecting rod, a second toggle rod and a machine body; mechanism optimization is carried out with the stroke adopted as an optimization target; after mechanism parameters of optimization of the upper toggle rod part are acquired, the mechanism parameters are substituted into the entire dual drive toggle rod mechanism; a lower toggle rod part is optimized with the driving torque adopted as an optimization target; and through decoupling iterative optimization of stroke and driving torque of the upper toggle rod part and the lower toggle rod part, the problem that an optimal solution of the dual drive toggle rod mechanism is hard to acquire through adopting a traditional optimization method can be solved, optimization of the dual drive toggle rod mechanism for the servo mechanical press is achieved, the performance and adaptability of the press are improved, the stroke of the machine body structure and a sliding block can be guaranteed to meet the working requirement, the driving torque of the cranks is greatly reduced, and the capacity and cost of a servo motor are reduced. According to the dual drive toggle rod mechanism, the utilization is simple and convenient, the structure is reasonable, and the mechanism is convenient and practical.

The invention relates to a tunnel boring machine residue discharging device, which comprises a residue discharging pipe body, wherein the front part of the residue discharging pipe body is provided with residue inlet holes; a flow guide cover is arranged in the residue discharging pipe body; the inner pipe cavity of the flow guide cover is in airtight isolation from the outer surface of the flow guide cover; the outer surface of the flow guide cover and the inner surface of the flow guide cover form a compressed air inlet passage into which compressed air is input from the outside; the inner pipe cavity of the flow guide cover is a residue discharging air passage; the compressed air inlet passage communicates with the residue discharging air passage through the front port of the flow guide cover; airflow inputted into the compressed air inlet passage from the outside passes through the front end of the flow guide cover and then enters the residue discharging air passage; the residue inlet holes form a negative pressure area; and residues from the outside enter the front port of the flow guide cover through the residue inlet holes and are then discharged from the residue discharging air passage after being mixed with the compressed air. Meanwhile, the invention further discloses a trenchless tunnel boring machine provided with the device. Related structures such as soil warehouses can be omitted, and as soil warehouses are unnecessary to be configured, a residue discharging system of an existing trenchless tunnel boring machine is simplified.

In order to minimize a reduction in drive torque in a permanent magnet motor having a skew structure, this permanent magnet motor is equipped with a rotor having: a rotor core formed by laminating multiple electromagnetic steel plates; and magnets housed in storage holes formed in the interior of the rotor core. The rotor core has a skew structure containing a first core and a second core, which are shifted with respect to each other in the circumferential direction with respect to the axis of the rotor. Among the magnets, first magnets are housed in the storage holes of the first core, and second magnets are housed in the storage holes of the second core. The first magnets and the second magnets oppose one another in the axial direction, with a first gap therebetween.