20results about How to "Small torque" patented technology

The invention relates to the technical field of motors, in particular to a stator punching sheet, a stator iron core comprising the stator punching sheet and an external rotor motor comprising the stator iron core. The stator punching sheet is annular, twelve stator tooth grooves used for winding stator windings are evenly formed in the outer periphery of the stator punching sheet at intervals in the circumferential direction, the diameter of the outer circle of the stator punching sheet is D1, the diameter of a virtual circle concentric with the outer circle on the stator punching sheet is D2, D2 / D1 is equal to 0.45-0.5, the area of an annular area between the outer circle and the virtual circle is the effective magnetic circuit area, and D1 is larger than D1 and smaller than D2. The stator tooth grooves are located in the annular area, and the proportion of the total area of the 12 stator tooth grooves to the effective magnetic circuit area is 0.45-0.5. The effective size of the motor can be reduced, the torque ripple of the motor is reduced, and the operation efficiency of the motor is improved.

The utility model discloses an ultralow-torque rotation-resistant steel wire rope, which relates to the technical field of steel wire ropes, and adopts the following scheme that the ultralow-torque rotation-resistant steel wire rope comprises an inner core rope, an inner hinged steel wire is rotatably wound outside the inner core rope, an outer hinged steel wire is reversely and rotatably wound outside the inner hinged steel wire, and lubricating grease is coated between the outer hinged steel wire and the inner hinged steel wire; the inner core rope is arranged and is made of a high-strength and low-elongation synthetic material, so that the tensile strength and the extrusion resistance of the steel wire rope are improved, and the use safety of stress stretching is ensured; a multi-layer strand structure is formed by adopting a special twisting process, the twisting directions of all layers of steel wires are opposite, the overall torque of the steel wire rope is effectively reduced, the problem of twisting and winding is avoided, the steel wires have high strength and toughness after heat treatment, the surfaces of the steel wires are coated with lubricating grease or anti-rust oil, friction and abrasion between the steel wires are reduced, and the service life of the steel wire rope is prolonged. And the service life of the steel wire rope is effectively prolonged.

This utility model discloses a slotless AC motor structure based on a reduced-core design, comprising a housing, a stator module, a partial core module, and a rotor module. The housing includes a main body and a base plate. The stator module is built into the housing and includes an annular non-magnetic frame and coils. The partial core module includes several cores, which are mounted one-to-one on a core mounting bracket, with air gaps between adjacent cores. This slotless AC motor structure aims to solve problems such as significant cogging effect, excessive core weight, and inflexible magnetic circuit in traditional motor structures. The motor eliminates the traditional slotted stator structure, adopting a combination design of slotless coils and a partial magnetic core. While ensuring effective control of the magnetic flux path, it significantly reduces motor weight, manufacturing complexity, and improves dynamic response performance.

The utility model provides a motor of an industrial fan, and belongs to the technical field of industrial fans. The problem that an existing motor is low in power is solved. The motor of the industrial fan comprises a stator shaft, a stator assembly and an outer rotor, the stator assembly is located in the outer rotor, the inner end of the stator shaft is fixedly connected with the stator assembly, the outer end of the stator shaft penetrates out of the outer rotor, 54 grooves are formed in the circumferential edge of the stator assembly at equal intervals, 48 pieces of magnetic steel are fixedly connected to the inner circumferential wall of the outer rotor at equal intervals, and the outer rotor is located in the outer rotor. And a gap is formed between two adjacent magnetic steels. The motor of the industrial fan has the advantage of increasing the power of the motor.

The utility model discloses an asymmetric notch punching sheet group structure and a permanent magnet brushless motor stator structure, the asymmetric notch punching sheet group structure comprises a first punching sheet, a second punching sheet and a third punching sheet, a first side of the second punching sheet is spliced with the first punching sheet, and a second side, opposite to the first side, of the second punching sheet is spliced with the third punching sheet. The first punching sheet, the second punching sheet and the third punching sheet respectively comprise a first end part and a second end part, the side edge of the first end part is an inclined side edge, the side edge of the second end part is a straight side edge, a first notch is formed between the second end part of the first punching sheet and the first end part of the second punching sheet, and a second notch is formed between the second end part of the third punching sheet. A second notch is formed between the second end part of the second punching sheet and the first end part of the third punching sheet, and the first notch and the second notch are asymmetrically arranged; according to the rotor, the asymmetric notch structure design is adopted, and the asymmetric structure enables the notch effect to be subjected to symmetric balance damage in the slot passing process of the rotor, so that the cogging torque is reduced, the qualified rate of production is greatly improved, and the production quality cost is reduced.

This invention discloses a low-leakage flux asymmetric magnetic pole rotor and magnetic pole motor, comprising rotor laminations with eight magnetic pole regions uniformly arranged on the laminations. A first, second, third, and fourth permanent magnet group are sequentially repeated twice on the eight magnetic pole regions. Multiple identical rotor laminations are stacked and welded to form a rotor core. The magnetic pole polarities of any two adjacent permanent magnet groups in the eight magnetic pole regions are opposite. The permanent magnetic field within a single magnetic pole is asymmetric, and the permanent magnetic fields of adjacent magnetic poles are also asymmetric, reducing cogging torque, torque pulsation, and vibration noise. Each magnetic pole consists of multiple layers of permanent magnet steel and a magnetically insulating air gap, resulting in significant magnetic focusing effect, high magnetic field strength, high power density, low air gap harmonic magnetic flux density, low hysteresis loss, low stator core eddy current loss, and high motor output efficiency.

This invention discloses an intelligent ventilation system and its control method based on a high-torque motor, solving technical problems such as insufficient heat dissipation, complex assembly, and poor sealing in existing technologies. The rotor assembly adopts an integral cast housing combined with polymer-bonded magnets, significantly improving structural strength and heat dissipation efficiency. The stator assembly features an innovative multi-slot winding design and a double-sealing structure, balancing high power density and long service life. The matching shaftless fan system achieves quick installation through a clamp structure, avoiding the complexity and safety hazards of traditional threaded connections. Furthermore, by introducing intelligent control and IoT technology, the ventilation system can adaptively adjust its operating mode according to changes in the surrounding environment or user needs, achieving healthy, safe, and hygienic ventilation. This invention is applicable to exhaust fans, fans, air purification equipment, and other fields, and features high efficiency, reliability, and ease of maintenance.

The utility model discloses a hammering releasing machine and a steel claw beam positioning device thereof, the steel claw beam positioning device comprises an oil cylinder support, a first oil cylinder, a connecting block and a positioning claw, a cylinder barrel of the first oil cylinder is connected with the oil cylinder support through the connecting block, a piston rod of the first oil cylinder is hinged with the upper part of the positioning claw, and the piston rod of the first oil cylinder is connected with the oil cylinder support through the connecting block. The rear end of the lower portion of the positioning claw is hinged to the oil cylinder support, and a clamping groove with a downward opening is formed in the front end of the lower portion of the positioning claw. The steel claw cross beam positioning device is additionally arranged on the hammering loosening machine, so that the distance between the clamping position of the guide rod and the striking stress position of the hammering device is shortened, the stress on the guide rod is indirectly reduced, the guide rod is not easy to deform when being stressed, the normal work is ensured, and the working efficiency is greatly improved.

The invention relates to a combing machine (100) for a spinning preparation process, having a machine frame (10) in which at least two combing heads (11) are arranged and having a main drive motor (12) for driving the combing heads (11). According to the invention, a main shaft (15) is provided, which is operatively connected to the main drive motor (12), wherein the main shaft (15) drives the at least two combing heads (11), wherein the combing heads (11) are operatively connected to the main shaft (15) in such a way that the combing cycles of the combing heads (11) run in phase opposition in the operation of the main drive motor (12).

The application discloses a kind of multi-physical field experimental devices for strong magnetic field, it is related to strong magnetic field technical field, including bearing assembly, pneumatic stirring assembly, reaction bottle fixing assembly and photo-thermal liquid bath component;Bearing assembly includes bearing frame and lifting mechanism, pneumatic stirring assembly includes air supply equipment, flexible air pipe, turbine, planetary reducer and stirring paddle, reaction bottle fixing assembly includes fixed frame structure and reaction bottle, photo-thermal liquid bath component includes outer bushing, heat equalizing cylinder, heating film, quartz window, light source and radiator.The application has the advantages that the reaction area can be accurately adjusted to the target magnetic field strength and magnetic field gradient position by precise positioning and lifting, and the illumination, heating and stirring can be cooperatively loaded and relatively independently controlled in the local reaction bottle, so as to meet the stable operation and rapid sampling requirements of multi-physical field reaction experiment under strong magnetic field extreme environment.

The invention relates to the field of industrial equipment, in particular to a motor, which comprises a shell and a rotor rotatably connected to an inner cavity of the shell, the rotor comprises a yoke part and a plurality of tooth parts, the plurality of tooth parts are uniformly connected to the outer peripheral surface of the yoke part around the axis of the yoke part at intervals, and tooth grooves for winding coils are reserved between the adjacent tooth parts. The planes, facing the tooth grooves, of every two adjacent tooth parts are parallel to each other. Through the arrangement of the yoke parts and the tooth parts and the design of parallel planes, the distribution of radial force waves in the circumferential direction is more symmetrical, part of the force waves are mutually offset, the excitation effect on the stator core is reduced, the interaction force between the rotor teeth and the stator slots is reduced, and the cogging torque is reduced, so that the vibration and noise of the motor are reduced, and the service life of the motor is prolonged. And normal use of the motor by a user is ensured.

The invention provides a valve which comprises a valve body with a valve cavity and a valve element, the valve cavity is provided with a cavity wall, the valve body is provided with at least one fluid channel leading to the cavity wall, the valve element is installed in the valve cavity, and the valve element is provided with a channel structure communicated with the fluid channel; the fluid channel is provided with a sealing piece, the sealing piece is arranged on the cavity wall, and the sealing piece is of a plane structure and comprises at least two layers. According to the valve, due to the plane structure, the sealing piece is easy to manufacture and low in cost, and positioning of the sealing piece is simple in the assembling process; by means of the at least double-layer design of the sealing piece, the high sealing effect can be achieved under low friction force, therefore, the torque needed for moving the valve element is reduced, and a more economical actuator can be used. Therefore, the valve is low in manufacturing cost and long in service life.

The utility model provides a soft seal ball valve, which relates to the technical field of ball valves and comprises a valve body and a ball body, a blow-down valve is arranged in the middle of the bottom of the valve body, a valve cover is arranged at the lower end of the blow-down valve, a first double-end bolt is arranged between the valve cover and the lower port of the blow-down valve, a first hexagon nut is arranged at the outer end of the first double-end bolt, and a second hexagon nut is arranged at the outer end of the second double-end bolt. A ball body is rotationally and movably arranged in the center in the valve cover, a valve rod is installed in the middle of the upper portion of the ball body, the middle of the valve rod is sleeved with a front cover, the upper end of the front cover is fixed to the lower portion of a connecting disc, and the connecting disc is installed on the lower portion of the turbine. Two O-shaped sealing rings are respectively arranged inside and outside the self-lubricating bearing and the packing box, and V-shaped packing made of PTFE (polytetrafluoroethylene) is preset in the packing box, so that the reliability and feasibility of the sealing performance of the valve shaft are ensured; meanwhile, the PTFE valve seat and the valve rod self-lubricating bearing which are small in friction coefficient and good in self-lubricating performance are adopted, the valve can be operated conveniently, flexibly and freely for a long time, and the valve is safer and more durable.

The utility model relates to humanoid robot technical field discloses a kind of humanoid robot foot structure and its humanoid robot, including front support, rear support and first pivot, first pivot is arranged in front support and rear support, and front support and rear support can rotate around the axis of first pivot relative;Rear support is integrally formed by front joint, connecting part and rear palm part, and the top of front joint and connecting part is provided with the first shaft end mounting portion of upwardly extending protrusion, the top of rear palm part is provided with the second shaft end mounting portion of upwardly extending protrusion, first shaft end mounting portion is provided with the inclined surface of inclined downward towards second shaft end mounting portion, inclined surface is provided with hollow part, and the bottom of rear palm part is extended from below to above and is provided with cavity. The weight of rear support is reduced by hollow part and cavity, so that humanoid robot is more easily balanced, solve the problem that foot structure cannot reduce weight under the condition of ensuring support stability and overall strength.

This invention discloses an improved sliding mode observer for permanent magnet synchronous motor control and a system relating to the field of motor control technology. Addressing the problems of severe chattering and low estimation accuracy in traditional sliding mode observers, the method includes: acquiring the motor voltage and current and transforming them to a stationary coordinate system; using an adaptive sliding mode observer integrating a fuzzy adaptive adjustment unit and a smoothing switching unit for state observation, outputting a smoothed back EMF estimation signal, wherein the fuzzy adjustment unit dynamically adjusts the sliding mode gain based on the current error, and the smoothing switching unit generates a continuous control signal to suppress chattering; inputting the smoothed back EMF signal into a phase-locked loop (PLL) unit to synchronously extract rotor position angle and speed estimates for closed-loop control. The system includes signal detection, an adaptive sliding mode observer, a PLL, and a closed-loop control module. This invention improves the accuracy of speed and position observation and system stability by synergistically suppressing chattering through fuzzy adaptive and smoothing switching, and by avoiding phase delay through a PLL.

The transmission assembly is reliable in operation and convenient to use and comprises a pivoting piece and a transmission piece which are coaxially arranged, the front end of the transmission piece extends into an inner hole of the pivoting piece, the transmission piece is provided with a C-shaped clamping spring in a hooping mode, and the C-shaped clamping spring is connected with the pivoting piece in a hooping mode. The notch of the C-shaped clamp spring is matched with the stop block on the pivoting piece; the relative rotation of the transmission piece and the pivoting piece is limited by the pre-tightening effect of the C-shaped clamp spring; a one-way limiting structure is arranged on the transmission part and abuts against the pivoting part, and the one-way limiting structure and the C-shaped clamping spring jointly limit rotation of the transmission part in the first direction. When the one-way limiting structure is separated from the pivoting piece, the transmission piece rotates in the second direction; the utility model relates to the technical field of automobile parts.

A rolling bearing device (10) for a wheel has an inner member (12), an outer member (11), a plurality of tapered rollers (13), and a ring-shaped cage (14). The cage (14) has a small-diameter annular portion (41), a large-diameter annular portion (42), and a plurality of columns (43). The columns (43) have a contact surface (45) on a side surface (44) thereof on the small-diameter annular portion (41) side and a non-contact surface (46) on the large-diameter annular portion (42) side. The contact surface (45) is capable of contacting an outer peripheral surface (131) of the tapered roller (13). The non-contact surface (46) is located at a position further from the tapered roller (13) in the bearing circumferential direction than the contact surface (45), and does not contact the outer peripheral surface (131) of the tapered roller (13).

The invention relates to a rotor punching sheet, a rotor core, a rotor, a motor and a vehicle, the rotor punching sheet comprises a plurality of accommodating grooves, and each accommodating groove is used for accommodating at least one magnetic member; the plurality of accommodating grooves are symmetrically arranged by taking a reference plane as a symmetry plane, and the reference plane is located in the radial direction of one rotor of the rotor punching sheet. The rotor comprises a rotor punching sheet and magnetic parts, and each accommodating groove of the rotor punching sheet accommodates one or more magnetic parts. The rotor punching sheet, the rotor core, the rotor motor and the vehicle have the beneficial effects that the rotor punching sheet, the rotor core, the rotor motor and the vehicle are provided, and the rotor punching sheet, the rotor core, the rotor motor and the vehicle which are symmetrically arranged by taking the reference plane distributed along the radial direction as the symmetry plane are provided, so that unbalance and impact of torque are reduced, and vibration and noise generated by the motor are reduced.

This utility model discloses a rotor structure for achieving skewed magnetic poles. It employs a segmented skewed rotor magnetic pole structure, comprising several segmented magnetic pole modules and a circular magnetic yoke with grooves. Each magnetic pole module has at least one magnet embedded in it and several through holes for axial and radial positioning and fixing. The inner circle of each magnetic pole module is fitted with the magnetic yoke by several protrusions distributed on both sides, with equal spacing between the protrusions on each side. Furthermore, the position of each magnetic pole module within the segmented skewed pole is determined by the distribution of its protrusions, and it is inserted into the grooves of the magnetic yoke in segments according to a preset skew angle to form a continuous skewed magnetic pole with a preset angle. This utility model can be used in conjunction with a straight stator slot design to improve stator winding efficiency and reduce stator manufacturing costs. The rotor does not increase costs compared to the original non-skewed pole design and is beneficial for engineering implementation. It can effectively weaken specific harmonics, thereby reducing cogging torque and torque pulsation. The axial force problem can be eliminated by designing different numbers of axial magnetic poles.

The utility model relates to the technical field of civil engineering, and provides a retaining wall capable of increasing anti-overturning capacity, which comprises a wall surface (1), a wall back (2), a base (3) and a wall top (4), the wall surface (1) and the wall back (2) are respectively positioned above the base (3) and are opposite to each other, the wall top (4) is opposite to the base (3) and is positioned on the top surfaces of the wall surface (1) and the wall back (2), a wall toe (5) is arranged on the wall surface (1), and the wall toe (5) is arranged on the base (3). And the bottom surfaces of the wall toes (5) are parallel to the bottom surface of the base (3). According to the retaining wall capable of improving the anti-overturning capacity, the anti-overturning moment of the retaining wall is relatively increased, and the anti-overturning capacity is improved.