32results about How to "Little vibration" patented technology

A fluid end for a high-pressure pump including a metallic block having a front, back, top, bottom, and opposed sides. The block has a horizontal, plunger passage extending from the front to the back thereof. A horizontal, outlet passage extends from one of the opposed sides of the block to the other with the outlet passage being positioned beneath, and at right angles to, the plunger passage. A suction passage extends vertically downward from the top of the block and intersects the plunger passage to define a pumping chamber at the point of intersection. A discharge passage extends vertically downward from the pumping chamber to the bottom of the block. The discharge passage is located adjacent to the outlet passage. A connector passage extends from the discharge passage to the outlet passage so as to place the discharge passage and outlet passage in fluid communication. A reciprocating plunger assembly is located the end of the plunger passage adjacent the back of the block. A plug is located in the end of the plunger passage adjacent the front of the block. A suction valve is located in the suction passage. A discharge valve is located in the discharge passage. A fluid supply manifold is pivotally secured to the top of the block and is in fluid communication with the suction passage.

An outer peripheral surface of a cam has an apex disposed of distance from a rotational axis, a first region adjacent the apex opposite to the direction of rotation that increases in distance from the rotational axis during rotation, and a second region adjacent the apex in the rotational direction that decreases in distance from the rotational axis of the cam with the rotation thereof. The apex is disposed where the phase θ thereof advances by 15 degrees and 55 degrees or less in the rotational direction from a position symmetrical to the rotational axis. The rate of change between the second region and the rotational axis is greater than the rate of change between the first region and the rotational axis. A retreat amount X when a saw blade reaches an uppermost point c from a foremost point is set to 0.8 mm.

The invention relates to a device, such as a rotary disk (1) or a longitudinal slider (2), for retaining optical components, this device comprising open orifices (3) arranged next to one another, and a raceway (4) having detents (5) being provided in the direction of the arranged orifices (3), which detents are embodied in such a way that they are to be brought into click-stop engagement with a ball bearing (6) running along the raceway (4), in order to hold the device (1, 2) in a selected position. In order to enable gentle click-stopping of the ball bearing (6) with a wide capture region, it is proposed that the detents (5) have, in the running direction, a profile comprising a combination of two arc-shaped profiles (10, 11), such that an outer profile (11) of lesser curvature surrounds an inner profile of greater curvature (10).

An outer peripheral surface of a cam has an apex having a greatest distance from a rotational axis, a first region located on the side of the apex opposite to the direction of rotation and having an increasing distance from the rotational axis with the rotation thereof, and a second region located on the side of the apex in the rotational direction and having a decreasing distance from the rotational axis of the cam with the rotation thereof. The apex is disposed in a position where the phase 0 thereof advances by 15 degrees or more and 55 degrees or less in the rotational direction from a position symmetrical to a center of the pin with respect to the rotational axis. The rate of change in the distance between the second region and the rotational axis is set to be greater than the rate of change in the distance between the first region and the rotational axis. A retreat amount X when a saw blade reaches an uppermost point c from a foremost point is set to be 0.8 mm or more at a lower end of the saw blade.

An electric-motor driven actuator has a housing, in which a motor and a carrier plate are arranged and the carrier plate is connected in a fixed manner to a brush holder. The brush holder has a first brush holder which is rigidly connected to the carrier plate. A second brush holder component is also provided which is mechanically coupled to the first brush holder component and is decoupled in a vibration-neutralizing manner from the first brush holder component via at least one damping element and which holds brushes via which contact can be made with a commutator of the motor.

A multi-direction submersible floating aerator has a gas-ring compressor (4), a base (6), a gas inlet tube (9), a seat (11), multiple submersible hollow shaft motors (13), and multiple propellers (14). The base (6) is disposed between the gas-ring compressor (4) and the gas inlet tube (9). The propeller (14) is coaxially connected to the submersible hollow shaft motor (13). The seat (11) is disposed between the gas inlet tube (9) and the submersible hollow shaft motor (13). The seat (11) is hollow. A first opening is disposed at the top of the seat (11), and multiple second openings are disposed on one side of the seat (11). The seat is (11) used for evenly distributing compressed air. Thus, the aeration is more even and stable, and aeration efficiency is greatly improved.

Disclosed is a brushless DC motor drive system comprising a pole-position detector for detecting respective pole positions of permanent magnets of a rotor of a brushless DC motor, a present speed computing means for computing present speed of the brushless DC motor on the basis of an output signal from the pole-position detector, a speed differential computing means for computing a difference between a speed command and the present speed, that is, a speed differential, an energization start time computing means for computing energization start time in a present instance on the basis of energization start time in a preceding instance, and the speed differential, an energization start instruction means for instructing energization start upon the elapse of the energization start time in the present instance from a phase changeover point in time, an energization completion time computing means for computing energization completion time by subtracting the energization start time in the present instance from preceding pulse time and an energization completion instruction means for instructing energization completion upon the elapse of the energization completion time from the phase changeover point in time.

The invention discloses a stamping die for automobile interior plates. The stamping die comprises a lower die base. A plurality of supporting rods are arranged at the upper end of the lower die base. An upper die base is arranged at the upper ends, away from the lower die base, of the supporting rods. A first fixing base is arranged on the side, close to the lower die base, of the upper die base. A notch is formed in the side, close to the lower die base, of the first fixing base. Sliding rails are symmetrically arranged on the inner wall of the notch and vertically arrayed. A connecting block is arranged between the two sliding rails. A male die is arranged on the connecting block. A plurality of springs are arranged on the side, close to the upper die base, of the male die at equal intervals. A second fixing base is arranged at the upper end of the lower die base and located among the supporting rods. The stamping die is simple in structure, greatly lowers the requirement for the tonnage of a machine tool and reduces cost; besides, the machine tool hardly vibrates, and thus noise is reduced; the stamping die hardly vibrates and does not generate abnormal sounds, the service life of the male die and a female die is prolonged, the quality of the stamping die is improved, and manpower and material resources are saved.

An X-ray generator comprising a target for receiving electrons and generating X-rays, a separator for dividing an internal space of the target into a coolant inflow path and a coolant outflow path, a motor for rotating the target, and a coolant inflow path and a coolant outflow path for supplying a coolant to the coolant inflow path and recovering the coolant through the coolant outflow path, wherein the separator rotates in the same rotation direction as the target when the target rotates. In the X-ray generator in which a coolant inflow path and a coolant outflow path are provided by a separator inside a rotating target, reduced torque load and reduced vibration can be realized.

A brushless DC motor drive system includes a pole-position detector for detecting respective pole positions of permanent magnets of a rotor of a brushless DC motor. A present speed computing unit computes a present speed of the brushless DC motor on the basis of an output signal from the pole-position detector. A speed differential computing unit computes a speed differential between a speed command and the present speed. An energization start time computing unit computes an energization start time in a present instance on the basis of an energization start time in a preceding instance, and the speed differential. An energization start instruction unit instructs energization start upon the elapse of the energization start time in the present instance from a phase changeover point in time. An energization completion time computing unit computes an energization completion time by subtracting the energization start time in the present instance from preceding pulse time. An energization completion instruction unit instructs energization completion upon the elapse of the energization completion time from the phase changeover point in time.

In particular in articles of furniture having at least an element which may be adjusted with a DC motor, preferably via a mechanical transmission, it is desirable to have a level of acoustic noise as low as possible. The power supply to the DC motor is based on a transformer with rectification and smoothing. With the invention it has surprisingly been found that the level of acoustic noise may be reduced significantly in that the secondary side of the transformer has a first control to compensate for the loss in the motor, thereby keeping the speed thereof constant for a long period of time, and a second control adapted to remove the ripple in the voltage, thereby keeping the speed of the motor constant for a short period of time.

An electric double-blade slot cutting machine comprises a first cutting unit having a first cutting part and provided along a cutting route and presents a reciprocating movement; a second cutting unit having a second cutting part provided along the cutting route and presents the reciprocating movement, wherein moving directions of the first cutting unit and the second cutting unit is opposite while cutting; a restriction holder for restricting the first cutting unit and the second cutting unit to moving along the cutting route; a transmission unit; and a motor. With the foregoing structure, the electric double-blade slot cutting machine can work with small vibration and stable performances; a speed of the motor is increased for improving work efficiency; and with an extension rod, the electric double-blade slot cutting machine is adaptable for standing utilization.

The invention provides a punching die. The punching die comprises a male die and a female die. The female die is in a cylinder shape. An inner cavity of the female die is a punch travel cavity. The size of the male die is matched with the size of the inner cavity of the female die. The upper end face of the female die is provided with a raw material containing table. A feed mechanism is arranged on the side face of the upper end face of the female die. The feed mechanism and the containing table are horizontally arranged. A shearing face of the containing table on the upper end face of the female die is in a bent face shape. The punching die further comprises a sliding mechanism which is detachably connected with the bottom of the female die. The punching die has the advantages that shearing cotton yarn of the female die is designed into the bent face shape, the aims of conducting material force bearing step by step and conducting punching part by part are achieved, and the requirement for greatly reducing the machine tool tonnage is achieved; cost is saved, the machine tool vibration is not large, and noise is reduced; the die vibration is small, no abnormal sound is generated, the service life of the male die and the female die is prolonged, the quality of the die is improved, and manpower and material resources are reduced.

The invention discloses a step self-adaptive walking method and device. The method comprises the steps of employing a vertical walking mode, replacing a conventional wheel with a plurality of walkingassemblies perpendicular to the base surface of a main bearing body, enabling the walking assemblies to support the main bearing body in a multi-point supporting mode, and enabling the base surface ofthe main bearing body to be always in a horizontal state; and the advancing state of the walking assemblies is completed by a central control unit in a unified and coordinated mode. The walking device mainly comprises a plurality of walking assemblies, the main bearing body and a central control unit, is simple in structure, large in load capacity and stable and reliable in operation, and is suitable for transportation of complex roads including steps, uneven road surfaces and the like under the application environment that the operation speed is not emphasized.

The invention discloses a vibration damping type mechanical ammeter mounting bracket. The vibration damping type mechanical ammeter mounting bracket is provided with three guide rails on the body. Each guide rail is provided with a slide block. The slide block is connected with the guide rail through an elastic rubber strip. Therefore vibration which is born by the mechanical ammeter which is mounted on a supporting plate is mostly absorbed by the elastic rubber strip. The vibration damping type mechanical ammeter mounting bracket has advantages of relatively slight ammeter body vibration, nolarge vibration of mechanical components in the ammeter body, no easy damage, long service life and relatively high measuring accuracy.

The invention relates to an electric motor tricycle, in particular to a gearbox motor straight rotating device for an electric motor tricycle, and a driving method thereof. The device is characterized in that the device comprises a motor, an epicyclic gearbox assembly, a differential gearbox assembly, a differential mechanism, a rear bridge casing assembly, a brake drum, a brake mount and a half axle; the horizontal rotating force of the motor is transmitted to the differential gearbox assembly and the differential mechanism connected with the differential gearbox assembly through the epicyclic gearbox assembly, and is converted into a vertical rotating force through the differential mechanism; and the vertical rotating force is transmitted to the half axle which is connected with the differential mechanism. The invention utilizes a gear to replace a chain, the motor is connected with the half axle by a shaft through the epicyclic gearbox assembly, the differential gearbox assembly and the differential mechanism, and the brake drum is connected with a rear bridge outer pipe by a round nut check washer and a round nut. The invention has the advantages of high bearing capacity, small running oscillation, low consumption rate, long service life and the like, is widely suitable for various electric tricycles, and has good market prospect.

An X-ray generator comprising a target for receiving electrons and generating X-rays, a separator for dividing an internal space of the target into a coolant inflow path and a coolant outflow path, a motor for rotating the target, and a coolant inflow path and a coolant outflow path for supplying a coolant to the coolant inflow path and recovering the coolant through the coolant outflow path, wherein the separator rotates in the same rotation direction as the target when the target rotates. In the X-ray generator in which a coolant inflow path and a coolant outflow path are provided by a separator inside a rotating target, reduced torque load and reduced vibration can be realized.

The invention discloses a terrace foundation stamping tamper which comprises a rack, a power mechanism with a flywheel and a force-amplifying stamping mechanism, wherein the power mechanism and the force-amplifying stamping mechanism are arranged on the rack; the force-amplifying stamping mechanism comprises a connecting rod, a toggle rod I, a toggle rod II and a tamping body; the tamping body is positioned in a slide path which is perpendicularly arranged on the inner part of the rack; the inner wall of the slide path is provided with a guide wheel for guiding the tamping body to slide up and down along the slide path; the connecting rod, one end of the toggle rod I and one end of the toggle rod II are hinged together by virtue of a pin roll II; the other end of the connecting rod is hinged to a pin roll I of a flywheel outer edge; the other end of the toggle rod I is hinged on the rack positioned above the tamping body by virtue of a pin roll III; and the other end of the toggle rod II is hinged to the upper end of the tamping body by virtue of a pin roll IV. According to the terrace foundation stamping tamper, the tamping body can generate great stamping force on the terrace foundation by use of relatively small power, so that compactness of the foundation reaches required standards, and therefore, the constructed terrace does not sink and deform forever.

The invention discloses a terrace foundation stamping tamper which comprises a rack, a power mechanism with a flywheel and a force-amplifying stamping mechanism, wherein the power mechanism and the force-amplifying stamping mechanism are arranged on the rack; the force-amplifying stamping mechanism comprises a connecting rod, a toggle rod I, a toggle rod II and a tamping body; the tamping body is positioned in a slide path which is perpendicularly arranged on the inner part of the rack; the inner wall of the slide path is provided with a guide wheel for guiding the tamping body to slide up and down along the slide path; the connecting rod, one end of the toggle rod I and one end of the toggle rod II are hinged together by virtue of a pin roll II; the other end of the connecting rod is hinged to a pin roll I of a flywheel outer edge; the other end of the toggle rod I is hinged on the rack positioned above the tamping body by virtue of a pin roll III; and the other end of the toggle rod II is hinged to the upper end of the tamping body by virtue of a pin roll IV. According to the terrace foundation stamping tamper, the tamping body can generate great stamping force on the terrace foundation by use of relatively small power, so that compactness of the foundation reaches required standards, and therefore, the constructed terrace does not sink and deform forever.

A bearing member according to an embodiment of the present invention is formed into a single cylindrical shape or a cylindrical shape divided into arcs along a circumferential direction, and is assembled to a housing on an outer peripheral side of the bearing member. The bearing member includes an outer peripheral surface provided on a side opposed to an inner peripheral surface of the housing. A maximum height Rz (μm) of a surface roughness of the outer peripheral surface is set as 2.00 μm≤Rz≤4.00 μm, and a value of ratio between an average protruding-peak height Rpk (μm) and a load length rate Mr1 (%), that is a load curve parameter for the surface roughness is set as 0.010≤Rpk / Mr1≤0.100.

The invention discloses a vortex type peanut amplitude peeling device. The vortex type peanut amplitude peeling device comprises a rotary peanut dispersing mechanism for rotatably dispersing peanuts,a vortex type heating mechanism for heating and refrigerating the peanuts and an amplitude screening mechanism for removing peanut coats through vibration, wherein a plurality of supporting legs A arefixedly connected to the outer wall of the rotary peanut dispersing mechanism; and the vortex type heating mechanism is fixedly connected to the outer wall of the rotary peanut dispersing mechanism through the supporting legs A. A spiral plate is fixed to a rotary auger, and the rotary auger is closed, so that the peanuts spirally rotate in the spiral plate; a plurality of peanut grooves are formed in the spiral plate, and the peanut grooves have oblique angles towards the middle direction, and two sides of each peanut groove are high; when rotating on the peanut grooves, the peanuts continuously move towards the middle, so that the peanuts can be uniformly heated, dust on the peanuts can be well removed through rotation of the peanuts, and the effect of removing the peanut coats is achieved; and the rotating speed of the rotary auger is low, so that the peanuts are not liable to damage.

The invention discloses coix seed winnowing equipment. The equipment comprises a base, wherein eight sliding limit columns are symmetrically arranged on the upper end of the base; two supporting seats are symmetrically arranged on upper ends of the eight sliding limit columns; spring dampers are respectively arranged between the supporting seats and the base; a machine body is arranged on upper ends of the two supporting seats jointly; an exhaust fan is clamped in the machine body; the upper end of the exhaust fan penetrates through the machine body; a hanging bar is arranged at the upper end of the exhaust fan; two fixing frames are symmetrically arranged on the machine body; a connecting block is arranged on the two fixing frames jointly; a moving seat is arranged on the two fixing frames jointly in a penetrating manner; the moving seat is in threaded connection a threaded rod; and the upper end of the threaded rod penetrates through the connecting block and is connected with a first motor arranged on the connecting block. The equipment disclosed by the invention has the advantages that the structure is stable; the vibration amplitude is small during work; the exhaust fan is conveniently taken out from the machine body to be maintained; a feeding door body is convenient to open and close; the time and the labor are saved; and the equipment is convenient for staff to operate and is worth popularizing.

The invention discloses a temporary substitute device for rolls of a continuous rolling mill unit. The temporary substitute device comprises a lower roll table base, an upper guide and guard frame and a roll assembly. The lower roll table base is connected with the lower portion of the upper guide and guard frame, and the upper portion of the upper guide and guard frame is connected with the roll assembly. The lower roll table base comprises a transmission side base body and an operation side base body, and the transmission side base body and the operation side base body are connected through a steel plate. The distance between the inlet plane of the operation side base body and the outlet plane of the operation side base body is matched with the width of an operation side bearing pedestal of a rolling unit bottom working roll, and the distance between the inlet plane of the transmission side base body and the outlet plane of the transmission side base body is matched with the width of a transmission side bearing pedestal of the rolling unit bottom working roll. The temporary substitute device can improve the efficiency of a production line, guarantee the surface quality of rolled products and lower the consumption of the rolls, and is reasonable in structural design and convenient to install and use.

The invention discloses a jacking type stamping die. The jacking type stamping die comprises an upper die cover, a lower jacking die, a die removing layer, a punch, supporting arms, connecting rods, ejector pins and ejector assemblies. The upper die cover and the lower jacking die are arranged at the upper end and the lower end of the die removing layer. The punch is vertically arranged at the middle position of the upper die cover and downwards extends into the die removing layer. The supporting arms are arranged on the die removing layer and connected with the corresponding ejector assemblies through the corresponding connecting rods. The ejector assemblies are arranged in the lower jacking die. The ejector pins are vertically arranged in the die removing layer and downwards extend to beconnected with the corresponding ejector assemblies. In this way, the jacking type stamping die is provided with the ejector pins and the ejector assemblies, and the jacking type stamping die has theadvantages that the requirement for the tonnage of a machine tool is greatly lowered, the cost is saved, vibration is not large, noise is reduced, the die vibration is relatively small, no special sound is generated, the service life is prolonged, the quality of the die is improved, and the manpower and material resources are reduced.

The reduction of noise in the rotation of the tire and the improvement of resistance to hydroplaning are established and also the resistance to uneven wear is improved, in which four circumferential main grooves 2-5 are formed asymmetrically, and a sum of groove volume in a circumferential direction in lateral grooves formed in a shoulder land part row 7 as a portion of an axially inner side per unit width is made smaller than a sum of groove volume in the circumferential direction in lateral grooves 11 formed in a shoulder land part row 9 as a portion of an axially outer side and a land part row 6 in a central region is rendered into a rib, and slant grooves 13 extending at an average inclination angle of not less than 45 DEG with respect to a widthwise direction of the tread are arranged in a second inner land part row 8 located at a side of an equatorial line adjacent to the shoulder land part row 7 at the axially inner side and these slant grooves 13 are opened to the circumferential main groove located adjacent to the second inner land part row 8 of the axially inner side.