5620 results about "Bilateral symmetry" patented technology

A first printing unit for forming a front image on one surface and a second printing unit forming a back image on the other surface are respectively constructed with two stages of printing heads. With respect to the image formed on one surface of a printing medium by the first printing unit, the image formed on the other surface of the printing medium by the second printing unit is formed as a mirror image of bilateral symmetry about an axis in a transporting direction so that the image on the other surface is consistent with the image on one surface.

A semiconductor wafer to be diced into individual SBDs, HEMTs or MESFETs has a substrate with a main semiconductor region and counter semiconductor region formed on its opposite surfaces. The main semiconductor region is configured to provide the desired semiconductor devices. In order to counterbalance the warping effect of the main semiconductor region on the substrate, as well as to enhance the voltage strength of the devices made from the wafer, the counter semiconductor region is made similar in configuration to the main semiconductor region. The main semiconductor region and counter semiconductor region are arranged in bilateral symmetry as viewed in a cross-sectional plane at right angles with the substrate surfaces.

The present invention provides a system, or kit, of injection molded panels having integrated connectors which combine to form an enclosure, commonly in the form of a utility shed. The bilaterally symmetrical panels are formed of injection molded plastic to interlock with one another without the need for separate I-beam connectors. The ends of the wall panels have cavities to accept both roof and floor outwardly projecting interlocking posts for interlocking cooperative engagement which serve to rigidly connect the components together. The bilateral symmetry of the wall, roof, floor and door components also minimizes component shapes and simplifies enclosure construction.

A safety power connection device comprises a fixed base fixed to the wall and a power connector connected to electrical equipment. The fixed base has a slide cavity inside. A slot communicated with the outside is arranged in the front end wall of the slide cavity. A slide frame capable of sliding back and forth is installed in the slide cavity. The slide frame is provided with an access slot which has an opening facing the front end and is through up and down. Long and narrow slots with openings facing the front end are symmetrically arranged on the left and right sides inside the slide frame. Shielding plates are fixedly arranged on the rear side of the front end wall of the slide chamber in bilateral symmetry. Power supply slots are arranged in the rear side of the front end wall of the slide chamber in bilateral symmetry. Conductive heads matching the power supply slots are arranged at the front end of the slide frame in bilateral symmetry. Driven racks are arranged on the two sidewalls of the access slot. Gears meshed with the driven racks are installed in bilateral symmetry in the slide cavity through a rotating shaft. A transverse plate is fixedly installed in the access slot. Through slots are arranged in bilateral symmetry in the transverse plate. Conductive elastic pieces are installed in the through slots.

The invention discloses a new energy automobile charging pile with high safety. The new energy automobile charging pile comprises a machine body and a charging gun head arranged at the bottom of the machine body. A containing cavity is formed in the bottom inside the machine body; sliding grooves are formed in the left and right sides of the containing cavity correspondingly; screws are arranged in the sliding grooves; and the top of the screws are in power connection with motors; a movable beam is arranged in the containing cavity, and the two side ends of the movable beam stretch into the sliding grooves and are connected with the screws in threaded fit mode; a connecting block is arranged at the bottom of the movable beam; the bottom of the connecting block penetrates through the bottom wall of the machine body and is connected with the bottom wall of the machine body in a sliding fit mode; first cavities are formed inside the connecting block in a bilateral symmetry mode; sink grooves are formed in the tops of the first cavities; an embedded groove is formed in the end face of the bottom of the connecting block; communicating holes are formed in the position, between the embedded groove and the first cavities, of the connecting block; second cavities are formed symmetrically in the outer side wall of each communicating hole; first sliding blocks are arranged in the first cavities; first springs are arranged between the tops of the first sliding blocks and the sink grooves; and sliding rods extending into the communicating holes are arranged at the bottoms of the first sliding blocks. The structure is simple, operation is convenient, and automatic locking can be achieved during charging.

The invention discloses an unmanned air vehicle with multiple rotary wings in a plane-symmetry layout, comprising a body, rotary wing assemblies and undercarriage, wherein, the number of the rotary wing assemblies is an even number more than or equal to 4; each rotary wing assembly comprises a rotary wing support arm, a rotary wing motor and a rotary wing, the rotary wing motor is fixed at the outer end of the rotary wing support arm; the rotary wing is arranged on a rotation shaft of the rotary wing motor and is driven by the rotary wing motor; the longitudinal symmetrical planes of the all rotary wing assemblies relative to the body are distributed in a bilateral symmetry mode, and are fixedly connected with the two sides of the body through the inner ends of the rotary wing support arms; an equipment compartment and a power source compartment separated front and back are arranged in the body, the equipment compartment comprises a navigation component, a flight control component and a communication component; the power source compartment comprises a battery for providing power to the electronic equipment of the whole air vehicle; the undercarriage is fixedly connected at the lower part of the body; and the flight control component is provided with a flight control computer with the functions of fault diagnosis of the multiple rotary wings and fault-tolerant flight control. The unmanned air vehicle has the advantages of novel appearance layout, concise internal structure, reliable system control and better engineering application value, and is easy for engineering implementation.

A vertical type power MOSFET remarkably reduces its ON-resistance per area. A substantial groove formation in which a gate structure is constituted is performed beforehand utilizing the LOCOS method before the formation of a p-type base layer and an n+-type source layer. The p-type base layer and the n+-type source layer are then formed by double diffusion in a manner of self-alignment with respect to a LOCOS oxide film, simultaneously with which channels are set at sidewall portions of the LOCOS oxide film. Thereafter the LOCOS oxide film is removed to provide a U-groove so as to constitute the gate structure. Namely, the channels are set by the double diffusion of the manner of self-alignment with respect to the LOCOS oxide film, so that the channels, which are set at the sidewall portions at both sides of the groove, provide a structure of exact bilateral symmetry, there is no positional deviation of the U-groove with respect to the base layer end, and the length of the bottom face of the U-groove can be made minimally short. Therefore, the unit cell size is greatly reduced, and the ON-resistance per area is greatly decreased.

The invention relates to an engineering oil pipe paint spraying device, in particular to an engineering oil pipe surface paint spraying device. According to the technical problem to be solved, the engineering oil pipe surface paint spraying device does not need assistance of manual labor, and is good in automatic performance, high in maneuverability, high in working efficiency, convenient to operate and capable of uniformly spraying paint to the surface of an engineering oil pipe. To solve the technical problem, the engineering oil pipe surface paint spraying device comprises a left support, a right support, a material collecting frame, a top plate, a sliding block, a sliding rail, a hollow pipe, a spraying head, an air cylinder, a hairbrush, a first motor, a first rotating shaft, a first bevel gear and the like. The left support and the right support are vertically arranged in a bilateral symmetry manner. The material collecting frame is arranged below the position between the left support and the right support. According to the engineering oil pipe surface paint spraying device, in the process of spraying the paint to the surface of the engineering oil pipe, while the engineering oil pipe rotates, the spraying head sprays the paint.

The invention relates to an extension type quasi-zero stiffness vibration isolator and an implementation method thereof. The vibration isolator is formed by a negative stiffness mechanism in parallel connection with a positive stiffness main spring, wherein the negative stiffness mechanism is composed of extension springs, connecting rods, slide blocks and guide rails; negative stiffness can be generated in the vertical direction, and in addition, the defect that compression springs lose stability can be avoided; and it can be guaranteed that the structure is in bilateral symmetry when fine adjustment is conducted in the horizontal direction. On the basis of the principle that positive stiffness and negative stiffness counteract each other, after the negative stiffness mechanism is in parallel connection with the positive stiffness spring, stiffness, at the equilibrium position, of the vibration isolator is close to zero, and inherent frequency is also close to zero, so that starting vibration isolation frequency is greatly reduced; the vibration isolation section is increased; and capability of isolating low frequency or ultralow frequency vibration is achieved. The vibration isolator is simple and compact in structure and convenient to assemble and debug and has certain engineering application value in the fields such as automobiles, precise instruments, sensitive equipment, precision machining and aerospace engineering.

The invention discloses a perforating device suitable for steel tubes with different diameters. The perforating device comprises a base, a clamping device and rolling adjustment devices symmetrically arranged on the front and back sides of the clamping device are arranged at the end face of the top of the base, and a perforating rack is arranged at the position, between the clamping device and the back rolling adjustment device, of the base; a first rolling groove and a second rolling groove which are arranged in a bilateral symmetry manner are arranged in each rolling adjustment device, a separating plate is arranged between each first rolling groove and the corresponding second rolling groove, the first rolling grooves and the second rolling grooves are each internally provided with a bearing piece, and the bearing pieces on the left and right sides are each internally provided with rollers with taper face sides oppositely arranged; a lifting sliding cavity is arranged in the clamping device in a manner of being communicated with the base at the bottom of the clamping device, and a lifting sliding piece is arranged in the lifting sliding cavity; and through grooves are symmetrically arranged on the left and right sides of the top of the clamping device, and a driving sliding cavity is arranged in the lifting sliding piece. The perforating device is simple in structure and convenient to operate, and the perforating accuracy and stability are improved.

The invention comprises an upper layer and a lower layer. On the upper layer there is a gyroscope mechanical structure made on a monocrystalline silicon plate; on the lower layer there are signal leads made on the glass substrate. The gyroscope mechanical structure is composed of two identical substructures; said two substructures are set in bilateral symmetry and respectively connected to the cross beam; the cross beam is connected to the fixed base through two groups of twisted bars; said fixed base is mounted on the linkage point o the fixed base on the glass substrate in order to make the mechanical structure part on the upper layer hang above the glass substrate.

The invention discloses a clamping mechanism which comprises a shell and an oil cylinder installed in the shell, wherein clamping blocks are distributed in the front part of the shell in bilateral symmetry; and the inner side surfaces of the front half parts of the clamping blocks are inner concave surfaces. The clamping mechanism is characterized in that a cylinder barrel of the oil cylinder is centered at the rear part of the shell; the front end of a piston rod of the oil cylinder is articulated with a connecting plate; the left part and the right part of the connecting plate are respectively articulated with the rear ends of the clamping blocks; the front part of at least one cover plate of the shell is symmetrically provided with guide grooves left and right; guide pins are arranged in the middle parts of the two clamping blocks and inserted into the guide grooves; fixed blocks are clamped and fixed in the middle parts of the front ends of the two cover plates, and the normal lineof the surfaces of the front parts of the inner concave surfaces of the two clamping blocks are inclined to the directions of the fixed blocks. The invention has simple structure, high strength and large clamping force and can be suitable for different pipe columns with the external diameter range of 3.5-9.75 inches without replacing the clamping mechanism, and the clamping mechanism can not interfere with the adjacent pipe column during working.

The invention relates to a fertilizing device for planting forage grass in the animal husbandry, in particular to a high-efficiency fertilizing device for planting forage grass in the animal husbandry. The invention aims at providing the high-efficiency fertilizing device for planting the forage grass in the animal husbandry, which is high in fertilizing efficiency and convenient in operation and is time-saving and labor-saving. In order to achieve the aim, the invention provides the high-efficiency fertilizing device for planting the forage grass in the animal husbandry. The high-efficiency fertilizing device comprises a bottom plate, wheels, a first guide sleeve, a bracket, a special-shaped rack, a second guide sleeve, a first rack, a first gear, a left frame, a drawing wire, a swinging rod, a spring, a sector-shaped gear, a connecting rod, a first motor, a rotary disc, a clamping block, a connecting rod, a first supporting rod, a piston, a cylinder body, an installing plate, a fixed rod, a fixed plate and a spraying nozzle and the like; the wheels are arranged at the bottom part of the bottom plate in a manner of bilateral symmetry. The fertilizing device provided by the invention has the advantages that the fertilizing efficiency is high, the operation is convenient, and the time and the labor are saved; the fertilizing device plays an important role all the time, not only has good fertilizing effect, but also improve the working efficiency.

A pair of underwear for use by a male includes a fabric fashioned to form a boxer-brief type undergarment, the fabric having a bilateral symmetry and including a front panel. A rear panel is formed within the fabric and positioned immediately behind the front panel to form an internal pocket. A slit-shaped portal is formed within the rear panel for providing access to the internal pocket for depositing a scrotum and genitalia of the male. Finally, an external pouch extending outward from the front panel is provided as a depository for the genitalia of the male. The boxer-brief type undergarment minimizes perspiration and irritation, absorbs accidental leakage of fluid body waste, and eliminates exposure to the fluid body waste and stains on the body of the male. A thin layer of absorbent material can be included to minimize the effects of accidental leakage.

The invention discloses an integrated device for cleaning and storing medical test tubes, which comprises a cleaning box and a storage box. There are several test tube placement holes on the placement plate. The lower end of the first rotating shaft extends into the cleaning box and is connected with an electric telescopic rod. The lower end of the electric telescopic rod is equipped with a cleaning brush. The upper end of the second rotating shaft extends into the cleaning box and is equipped Cleaning cylinder, the inside of the cleaning cylinder is provided with a brush, the upper end of the second equipment box is provided with a purification box, the left end of the purification box is provided with a fan, the middle of the storage box is provided with a rotating rod, and the left and right symmetrical support plates are arranged on the rotating rod , the opposite side of the support plate is provided with a plurality of rotating shafts on the outer periphery, and a test tube box is arranged between the two opposite rotating shafts. The invention has the advantages of simple structure, convenient use, good cleaning effect, high cleaning efficiency, convenient storage and reduced work difficulty.

A variable-structure self-balancing two-wheeled vehicle is integrally of a symmetrical structure, and is provided with a vehicle body device, a driving device, a steering handlebar device and an electronic control device. The vehicle body comprises saddles, a manned pedal and vertical plates, wherein the saddles are in bilateral symmetry, the middle of the manned pedal is low, and the vertical plates are used for fixedly and integrally connecting the saddles with the manned pedal. The saddles and the pedal are hollow boxes for holding the driving device and the electronic control device respectively. The driving device comprises two wheel carriers, wheels, four driving motors, storage batteries and driving gears for the wheel carriers and the wheels, wherein the four driving motors are used for providing power for the wheel carriers and the wheels respectively and are controlled by the electronic control device. The steering handlebar device comprises a steering handlebar base, steering handlebars, a coil spring, a steering handlebar motor and a main control panel, and the electronic control device consists of a main control circuit, a plurality of different sensors, an electroniccontrol power source and control circuits for the sensors. The variable-structure self-balancing two-wheeled vehicle has the advantages that a plurality of driving motors are controlled by a computerand by means of digital technology, the vehicle can be driven in the front, back, left and right directions, the driving directions can be switched during driving, and the variable-structure self-balancing two-wheeled vehicle is multifunctional, flexible in operation and convenient in driving.

A novel cup device comprises a plug and an electric connecting base, a tightly-inserting arm is fixedly arranged at the lower end of the plug, a tapering part and a pointed part located at the lower end of the tapering part are arranged at the lower end of the tightly-inserting arm, and locking grooves extending left and right are formed in the pointed part; a sliding cavity is formed in the electric connecting base, upper sliding grooves are formed in the top wall of the sliding cavity in a bilateral symmetry mode, a tightly-inserting groove communicated with the outer end is formed in the top wall of the upper sliding groove, a sliding block is installed in the sliding cavity in a vertically sliding mode, sliding arms are arranged at the upper end of the sliding block in a bilateral symmetry mode and installed in the upper sliding grooves in a sliding mode, tapering grooves are formed in the sliding arms, through grooves communicated with the tapering grooves are formed in the sliding block in a bilateral symmetry mode, the electric connecting base is arranged at the lower end of the sliding block, a lower sliding groove is formed in the position, below the electric connecting block, of the bottom wall of the sliding groove, and a sliding plate is installed in the lower sliding groove in a vertically sliding mode.

The invention discloses a leveling system and a leveling method for an agricultural power chassis, and belongs to the technical field of vehicle chassis. The leveling system for an agricultural power chassis comprises a distance measuring sensor, a position sensor, a central processor, a vehicle frame, suspensions and wheels; four groups of the suspensions are mounted on the vehicle frame in bilateral symmetry according to the given wheelbase and wheel track, and the lower ends of the suspensions are connected with the wheels; the information of terrain height in front of the wheels is measured by the distance measuring sensor; the heights of the suspensions are measured by the position sensor to obtain the wheel-terrain height information; calculation and analysis are carried out by the central processor; the suspensions are driven by a servo motor and the heights of the suspensions are adjusted in real time; and the wheels actively contour the ground, so that dynamic leveling of the vehicle body during traveling and operation of the agricultural power chassis is achieved.

The invention discloses a smashing and screening device for compound fertilizer production. The smashing and screening device for compound fertilizer production comprises a base, a smashing tank, a bearing, a primary screening tank, a secondary screening tank, a second drive motor and a special-shaped gear, wherein the smashing tank is fixedly installed on the base through screws; two sets of mainsmashing rollers are installed in a smashing cavity in a bilateral symmetry mode; auxiliary smashing rollers are further rotationally installed in the smashing cavity; a scattering disc is further fixedly connected to the upper end of an output shaft of a first drive motor; the second drive motor is further fixedly installed on the outer wall of the right side of the smashing tank; and the special-shaped gear is further installed on an output shaft of the second drive motor. According to the smashing and screening device for compound fertilizer production, the structure is novel, and fertilizer particles are more uniform in the smashing process; and through arrangement of the scattering disc, smashed fertilizer is evenly tossed out and then falls into the primary screening tank, so that the fertilizer on the primary screening tank is evenly distributed and prevented from being accumulated on a screen of the primary screening tank.

The disclosure belongs to the technical field of lower limb exoskeleton, and specifically discloses a hip-knee passive exoskeleton device based on clutch time-sharing control, comprising a waist support subassembly, connection subassemblies, thigh subassemblies, clutch subassemblies, shank subassemblies and elastic member subassemblies, the waist support subassembly is configured to be connected to the waist, the connection subassemblies are configured to include two connection subassemblies which are arranged in bilateral symmetry on two sides of the support subassembly, the thigh subassemblies are configured to include two thigh subassemblies which are respectively connected to the two connection subassemblies, the clutch subassemblies are configured to include two clutch subassemblies which are respectively mounted on the two thigh subassemblies, the shank subassemblies are configured to include two shank subassemblies which are arranged in bilateral symmetry below the two thigh subassemblies, the elastic member subassemblies are configured to include two elastic member subassemblies which are arranged in bilateral symmetry. The disclosure can assist the movements of the knee and hip joints, thereby improving the energy utilization efficiency and reducing the metabolic energy consumption of walking.

The invention discloses a dust-free wall grinder with multi-angle adjustment, which comprises a base, and grooves are arranged on the upper side of the base, slide grooves are symmetrically arranged inside the groove, and a groove is arranged between the two slide grooves. A support plate, a number of shock absorbing devices are provided between the underside of the support plate and the bottom of the groove, an angle adjustment device is provided in the middle of the upper side of the support plate, and a telescopic device is provided on the upper side of the arc-shaped sliding frame, The upper end of the telescopic device is provided with a U-shaped bracket, the inner upper end of the U-shaped bracket is provided with a mounting plate, the upper side of the mounting plate is provided with a second motor, the output end of the second motor is provided with a grinding wheel, and the upper side of the support plate is left and right Counterweights are arranged symmetrically, and a dust collection box is provided on the upper side of the counterweight on the left side. The dust collection box communicates with the inside of the protective cover through a suction pipe, and the dust collection box includes a box body. The invention has the advantages of simple structure, convenient use, adjustable angle, wide application range, good damping effect and dustproof function.

The invention discloses a lining platform car of the single-thread railway tunnel, which contains the arched mould including the roof and side follow boards, the bracket with a lifting cylinder, the gantry and the supporting component of the arched mould. It is characterized in that: the roof follow board contains the left and right roof follow boards in bilateral symmetry. There is an adjusting roof follow board for changing the sectional width between them. The side follow board contains the detachable upper and lower side follow boards. A side adjusting follow board for changing the sectional height and radius can be added between them. With the adjusting roof follow board and the side adjusting follow board, the sectional size of the arched mould can be adjusted in certain range to adapt the tunnel engineering with different sections. It can reduce the engineering cost, lighten the working strength and improve the working efficiency.

The invention discloses a multifunctional self-walking assembled LED (light emitting diode) triangular warning board which comprises a self-walking device and a hint device, wherein the self-walking device comprises a vehicle body and a remote controller; the hint device comprises a folding type triangular warning board body; the triangular warning board body comprises two warning board assemblies which are in bilateral symmetry; each of the warning board assemblies comprises three warning sheets connected with one another through pin shafts; the two warning board assemblies are opened to form a complete triangle; LED lamps and fluorescent cloth are arranged on the warning sheets; a flashlight is arranged at a vehicle head, and a tail lamp is arranged at a vehicle tail; a gyroscope is further mounted in a vehicle body. The multifunctional self-walking assembled LED triangular warning board has an automatic operating function; operation and stop of the vehicle body can be conveniently controlled by the remote controller; the triangular warning board has the advantages of convenience in collection, simplicity in assembling and high use efficiency; by the built-in arrangement of elements such as the gyroscope and a beidou, the triangular warning board has the functions of walking in the straight line, displaying the position and the like and has the characteristics of good pre-warning effect, convenience in mounting and moving, quickness in arrangement and safety guarantee.

The invention discloses a welding fixture for steel wires of seats of automobiles. The welding fixture comprises a bottom plate base. The bottom plate base is divided into three regions according to sitting areas of each back-row seat cushion, the three regions include a left base, a right base and a middle base, the left base and the right base are arranged in a bilateral symmetry manner, and the middle base is positioned between the left base and the right base; first fixing devices, second fixing devices, third fixing devices, fourth fixing devices, fifth fixing devices and sixth fixing devices are symmetrically arranged on the left base and the right base; the middle base comprises a seven fixing device, an eighth fixing device and a ninth fixing device, the seventh fixing device is used for fixing steel wires at the outer edges and the inner edges of middle leg laying portions, the eighth fixing device is used for fixing buttock supporting steel wires of the middle sitting areas, and the ninth fixing device is used for fixing steel wires at middle backrest positions. The welding fixture has the advantages that the welding fixture is easy to assemble, reliable clamping and positioning effects can be realized, welding guns can be prevented from being blocked, and the production efficiency and the welding quality can be greatly improved; the welding fixture is simple in structure and easy to popularize and utilize.

The invention relates to the field of robot technology, and discloses a welding robot. The welding robot comprises a base. The upper end of the base is fixedly connected with two vertical plates in abilateral symmetry mode. The opposite sides, close to the upper ends, of the two vertical plates are symmetrically provided with grooves. The inner walls of the bottoms of the grooves are fixedly provided with longitudinally-arranged racks. A support rod is arranged between the two vertical plates. The two ends, corresponding to the two vertical plates, of the support rod are fixedly connected with connecting blocks. First motors are fixedly embedded in one ends of the connecting blocks. Output shafts of the first motors are fixedly connected with gears meshing with the racks. The lower end ofthe support rod is fixedly connected with two clamping plates in a bilateral symmetry mode. The opposite sides of the two clamping plates are rotationally connected with a screw through ball bearings. The rod wall of the screw is in threaded connection with a moving block. The lower end of the moving block is vertically and fixedly connected with an electric push rod. The output end of the lowerend of the electric push rod is fixedly connected with a welding gun. The welding robot is capable of performing welding work in all aspects and can be moved conveniently.

The invention discloses a plate punching device capable of automatically replacing drill bits. The device comprises a frame body, a cross beam and a punching assembly; the frame body includes a base, and stand columns fixed on the left and right sides of the top of the base; first cavities are arranged in the punching assembly in a bilateral symmetry manner; a second cavity is formed at the part, above the first cavities, in the wall body of the punching assembly; guide grooves arranged in a manner of extending up and down are respectively formed in the inner side walls of the first cavities on the left and right sides; transmission cavities are formed in the parts, above the guide grooves, in the wall body of the punching assembly; first rotating shafts arranged in a manner of extending up and down are arranged on the sides, far away from the guide grooves, of the first cavities; the top extension sections of the first rotating shafts penetrate through the inner top walls of the first cavities and extend into the second cavity; first bevel gears are fixedly arranged on the outer surfaces of the parts, positioned at the bottoms of the first cavities, of the first rotating shafts; a second rotating shaft is arranged in the center position of the inner wall of the second cavity; and the top of the second rotating shaft is connected with a first motor in a matched manner. The device is simple in structure, reasonable in design and convenient to operate, improves the punching efficiency, and is stable in operation and high in precision.

The invention relates to a spilt combined type support for a straight tube fluorescent lamp. The split combined type support comprises a lamp holder body with an installation bottom plate and lamp tube brackets sleeved at both ends of a fluorescent tube. The spilt combined type support is characterized in that the lamp holder body is a special shaped body of which the lateral section is in a T shape and the longitudinal section is in a right-angle shape; a T-shaped rigid jack catch is arranged on the upper part of the lamp holder body, guide rails are arranged on vertical surfaces on two sides of the lower part, and a pin inlet is formed on the end face of the bottom; a bayonet is formed at two side ends on the upper part of the T-shaped lamp holder body respectively; a clamping groove is formed on the lower part of a T-shaped crossing part respectively; a T-shaped opening is formed on the installation bottom plate; the T-shaped rigid jack catch is inserted into a socket of the T-shaped opening on the installation bottom plate to be assembled to form a lamp holder assembly; the lamp tube bracket consists of a circular pipe sleeve and hooked elastic jack catches which are arranged at one end of the pipe sleeve and are cast into a whole with the pipe sleeve; the hooked elastic jack catches are arranged on the vertical surface at one end of the circular pipe sleeve in a mode of bilateral symmetry; and a group of C-shaped grooves matched with the guide rails on the lower part of the lamp holder body is formed on inner sides of the two hooked elastic jack catches correspondingly, and U-shaped check blocks are arranged on low parts of the C-shaped grooves.

The invention relates to a cold spinning one-step coaxial multi-wedge type belt pulley which comprises a rim, a spoke and a hub, wherein the rim is provided with a plurality of multi-wedge type V-shaped grooves, effective diameter center of each V-shaped groove is concentric with axle hole center of the hub, each V-shaped groove is in bilateral symmetry, and the centre line of each V-shaped groove is vertical to the centre axle line of the hub, annular grooves are arranged among the rim, the spoke and the hub, the spoke is provided with a plurality of arc grooves, and the rim, the spoke and the hub are integrally formed on a spinning machine by using a steel plate in a cold spinning way. The cold spinning one-step coaxial multi-wedge type belt pulley has good softness of a flat belt pulley and large drive power of a V-shaped belt pulley, can absorb impaction and vibration, and is quieter than that of chain and gear drive with little noise. The invention also provides a fabricating method and fabricating equipment of the product.