323results about How to "Reduce the possibility of deformation" patented technology

The invention discloses a special aluminum square tube ceiling and a construction method thereof. The special aluminum square tube ceiling comprises a hanging steel bar keel hung under a concrete top plate, a cross-bracing keel and an aluminum square tube ceiling connected at the lower end of the cross-bracing keel, wherein the aluminum square tube ceiling is formed by the spaced distribution of a plurality of aluminum square tubes with U-shaped sections; the hanging steel bar keel is an unequal-length keel; the aluminum square tube ceiling presents the shape of a curved surface; two continuous aluminum square tubes are butt-jointed by a woody connection fitting, the two ends of the woody connection fitting are respectively embedded in U-shaped spaces of the aluminum square tubes, and the two U-shaped edges of the aluminum square tubes are extended to form bent edges which are symmetrical inwards and are covered on the two upper edges of the woody connection fitting. With the advantages of simple structure, labor/time saving, quick construction, low cost, accurate ceiling shape positioning and smooth curve, the invention is applicable to the building ceilings in various curved shapes.

The invention provides a production method for a damp-proof full-eucalyptus laminated wood veneer. The artificial board is formed by high-temperature pressing and pasting of a base material and melamine impregnated paper, wherein the base material is formed by bonding a plurality of layers of eucalyptus veneers through adhesives. The production method comprises the steps of veneer sorting, gluing, cold pressing, hot pressing, stacking maintenance and pasting of the melamine impregnated paper. The production method is characterized in that three times of cold pressing and hot pressing and two times of thermostatic chamber standing maintenance and cooling maintenance processes are adopted, the cold pressing is performed at the room temperature and under the pressure of 0.8-1.0MPa, the hot pressing is performed under the pressure of 1.5-2.0MPa, the first hot pressing is performed at the temperature of 120-125DEG C, the second hot pressing is performed at the temperature of 115-120DEG C, and the third hot pressing is performed at the temperature of 125-130DEG C; the thermostatic chamber standing maintenance is performed at the temperature of 80-90DEG C for 4-6h; the cooling maintenance is cooled to the room temperature from the temperature of a thermostatic chamber through natural ventilation for 3-4h.

The invention discloses a concrete pump, which comprises a concrete stirring device, a hopper (1), a fence (2) arranged in the hopper (1), and a vibrating device (3) used for driving the fence (2), wherein the vibrating device (3) comprises a vibrating arm (32) and a driving wheel (31) for driving the vibrating arm (32) to perform reciprocating movement; the driving wheel (31) is a cam and is fixedly connected with a stirring shaft (4) of the concrete stirring device; and the vibrating arm (32) is fixedly connected with the fence (2). The concrete pump solves the problem of easy concrete accumulation on the fence to ensure that concrete can enter the hopper quickly and is pumped smoothly, and the working efficiency and the reliability of the concrete pump are improved.

A first stationary contact (i.e., center stationary contact) has a center contact point exposed at the center on the bottom of a recess in a square-shaped switch base as viewed from the above. The first stationary contact is disposed to the bottom of the recess with its lead paths extended along one of diagonal lines of the square-shaped switch base from the center contact point toward both side edges of the switch base. Second stationary contacts (i.e., outer stationary contacts) are arranged at positions along an outer brim of the recess in a line-symmetrical manner about the one of the diagonal lines in areas opposite each other along the other diagonal line. The first stationary contact and the second stationary contacts are arranged in this manner and secured into embedment by means of insertion molding in the bottom of the recess in the switch base of an insulation resin.

The invention discloses a wheel type conveying line which comprises a rack. Multiple rows of eccentric rotating wheels are arranged on the rack in an equal height manner. The axes of all the eccentricrotating wheels are parallel to one another and are parallel to the horizontal plane. Each eccentric rotating wheel is arranged on an installing frame located on the rack in the manner of rotating around the axis of the eccentric rotating wheel. The eccentric rotating wheels on each row are attached to a driving roller, the driving roller makes contact with the lower semicircle of each eccentricrotating wheel, the driving roller is affected by upward elastic force, and thus the eccentric rotating wheels are attached to the driving roller in a self-adapting manner, or the driving roller makescontact with the upper semicircle of each eccentric rotating wheel, the eccentric rotating wheels are affected by the upward elastic force, and the eccentric rotating wheels are attached to the driving roller in a self-adapting manner. The driving roller rotates under the driving of a first power source, and the eccentric rotating wheels are driven to rotate through friction force. According to the wheel type conveying line, the design of the scheme is elaborate, the eccentric rotating wheels or the driving roller are affected by the upward elastic force, thus the eccentric rotating wheels always keep being attached to the driving roller, after abrasion is caused or when the installing position precision is poor, self-adaptive adjusting is achieved, rotating between the eccentric rotatingwheels and the driving roller is effectively ensured, and the conveying stability is improved.

The invention discloses a bracket-free floating air pressure caliper disc brake. The brake comprises a mounting plate (1), a brake caliper assembly (2), two guide pins (3), a screw (4), a friction plate (5), a pressure spring (6) and a pressure plate (7), wherein the mounting plate (1) is provided with a central through hole, the central through hole is centered on a non-steering axle, and the brake caliper assembly (2) is directly fixed on the mounting plate (1) through the guide pins (3). The brake has simple structure, is convenient to assemble and maintain, cancels a bracket, saves the cost and the assembly step, meanwhile, can ensure the braking performance, and eliminates the negative effect of canceling the bracket.

A vehicle seat is provided in which a seat back is constrained from tilting down when a seat cushion is moved to a position in which the seat back cannot be tilted down. The vehicle seat includes a base frame, a seat cushion frame (3) horizontally movable relative to the base frame between a first position and a second position different from the first position, a seat back frame (4) rotatable relative to the seat cushion frame (3), a lock member (5) configured to constrain the seat back frame (4) from tilting rearward, and an unlock mechanism (6) configured to release a lock applied by the lock member (5) when the seat cushion frame (3) is moved from the first position to the second position.

An artificial disk replacement device includes opposing plate members with a pivoting assembly disposed therebetween. The pivoting assembly allows the plate members to pivot relative to each other in a first direction, but inhibit movement of the plate members in a second direction. The plate members may be installed prior to installing the pivoting assembly. An installation tool for use with the artificial disk replacement device is also disclosed.

The invention discloses a strength-increasing shield tunneling machine cutter ring machining process, and belongs to the field of shield tunneling machine cutters. According to the technical scheme, the machining process comprises the following steps of S1 electro-slag remelting, S2 cogging, S3 cutting, S4 free forging, S5 die forging, S6 ring grinding, S7 rough inspecting, S8 spheroidizing annealing, S9 secondary inspecting, S10 rough turning, S11 quenching and S12 fine inspecting, wherein in the first step, an electro-slag furnace is utilized for remelting steel ingots into ESR ingots; in the second step, an electro hydraulic hammer is utilized for forging the ESR ingots into raw rod materials; in the fourth step, rod material blanks are subjected to free forging to upsetting; and in thetwelfth step, a cutter ring is cooled, and then the outer diameter, the inner diameter, the inner ring thickness and the outer ring thickness of the cutter ring are inspected. The strength-increasingshield tunneling machine cutter ring machining process has the effect of strengthening the cutter structure.

A contact terminal of an electronic device includes: a fixing member; a contact member extending from the fixing member and a limiting member and extending from the fixing member where one end portion of the limiting member restrains one end portion of the contact member, wherein the contact terminal provides an elastic force upon the contact member in a direction away from the fixing member, and a range where the contact member moves away from the fixing member is limited since the end portion of the limiting member restrains the end portion of the contact member. The disclosed contact terminal can be directly mounted on a circuit board by using a surface mounting device (SMD) process, thereby reducing production costs and interconnection loss.

An electrical connector includes an insulating housing, a plurality of terminals and a shielding shell which are molded integrally. The insulating housing has a top wall, two side walls, a bottom wall and a rear wall which are interconnected to form a box shape with an accommodating chamber formed thereamong. The terminals are molded in the insulating housing with contact portions extended into the accommodating chamber. The shielding shell includes an inner shell and an outer shell fixedly attached on the inner shell. The inner shell includes a top plate, two side plates and a bottom plate which are interconnected together to surround a receiving space thereamong. The shielding shell is molded in a periphery of the accommodating chamber with a portion of the outer shell exposed outside the insulating housing.

The invention provides a female terminal and an electrical connector. The female terminal is not easy to produce micro-sliding wear due to vibration, can obtain strong contact pressure, and has good workability under low insertion force. Also, prevent twisting. A female terminal (1), including two parts, a terminal body (2) and a reinforcing part (3) installed on the terminal body, the terminal body (2) has a plug-in piece that is inserted in the front The elastic contact piece (34) that the terminal (80) contacts, and has the electric wire connecting part (6, 8) that is connected with the electric wire at the back, and the described strengthening part (3) has the spring piece (38), and above-mentioned contact piece ( 34) When deflected due to contact with the above-mentioned blade terminal (80), the spring piece (38) supports the contact piece (34) to strengthen the contact pressure of the above-mentioned contact piece (34).

The invention discloses an in-situ energy controlled selective laser melting device and method. According to the in-situ energy controlled selective laser melting device and method, a path of synchronously scanned flat-topped large light spot is additionally arranged, energy below a powder melting point threshold value is provided, the powder preheating/solidification rate is regulated and controlled, formed metal is annealed, the temperature gradient is reduced, and the forming internal stress is reduced, so that behaviors such as deformation and cracking caused by stress are reduced; and meanwhile, due to the fact that energy input lower than the melting point threshold value of a material is provided, material melting can be completed only by providing low energy input for original SLMsmall light spots, and the adverse conditions of molten pool splashing, micro air hole generation and the like are improved. In addition, time and space distribution of laser energy is realized basedon an in-situ energy control mode. Therefore, according to the method, defects generated in the part forming process are effectively reduced, meanwhile, the solidification rate is controlled, the structure evolution is regulated and controlled, and the method plays an important role in stably and efficiently forming high-performance parts and promoting wide application of the additive manufacturing technology.

A power control unit for electric vehicle which can easily detach the high voltage cables even if the motor room is deformed, for example, by head-on collision and/or rear-end collision of the vehicle, which is difficult to be deformed, which can make small, and which can avoid an influence of heat generated by the reactor is disclosed. The power control unit 1 includes a box 10 which accommodates devices for controlling electric power supply of the electric vehicle; a reactor receiver 11a which is provided on a given external surface around the box 10 and supports a reactor R; a heat sink 12 connected to the lower end of the reactor receiver 11a, covering the bottom surface of the box 10, possessing passages including passage wall inside thereof, and performing heat-exchange with the box 10 by allowing coolant water to flow within the passage; and a partition 13a, which is laid on at least one side of the box 10 extending toward the longitudinal direction of the vehicle EV, and is detachably communicated with cables to be connected to the traction motor 4 disposed below the heat sink 12 to supply power.

The invention relates to a preparation process of a heatable aluminum foil packaging lunch box, which uses punch forming equipment. The punch forming equipment comprises a bottom plate, a workbench, amounting frame, a punching device and a material placing device, and the specific process flow for preparing the aluminum foil packaging lunch box by adopting the punch forming equipment is as follows: aluminum foil cutting, aluminum foil transferring, punch forming, edge pressing processing and discharging stacking; a punching device comprises a lifting air cylinder, a mounting block, a punchinghead and an edge pressing mechanism. According to the preparation process of the heatable aluminum foil packaging lunch box provided by the invention, an aluminum foil is punched and formed through the cooperation of the material placing device and the punching device, so that the flaky aluminum foil is made into a lunch box finished product, edge pressing treatment can be conducted on the lunchbox in the punching process at the same time, production equipment for edge pressing of the lunch box does not need to be additionally arranged, and in the aluminum foil moving process, the aluminum foil is guided and positioned in an air blowing mode, position deviation of the aluminum foil is avoided, and meanwhile aluminum foil deformation caused by extrusion is avoided.

A bus bar includes a body having at least one bent portion and a plate-shaped or bar-like terminal located on at least one end of the body and formed of a material identical with a material of the body integrally with the body in a seamless manner. The terminal has a higher hardness than the bent portion.