75results about How to "No abnormal sound" patented technology

Provided are double-track slip support structures for a large-span net rack assembly bed-jig platform. Two sides of a net-rack span are correspondingly equipped with the double-track slip support structures. Each double-track slip support structure comprises a lateral slip steel rail system and a vertical slip steel rail system and is characterized in that each lateral slip steel rail system comprises multiple concrete columns (1), lateral slip steel rail blocking beams (3) and a lateral slip steel rail (5); the vertical slip steel rail system comprises a bed-jig spherical-hinge support bracket (8) and a vertical slip steel rail (12), wherein the bed-jig spherical-hinge support bracket and the lateral slip steel rail (5) are correspondingly arranged; and a bed-jig spherical-hinge support (7) is accommodated in the upper center of the bed-jig spherical-hinge support bracket. Each double-track slip support structure comprises the lateral slip steel rail system and the vertical slip steelrail system. A device is simple in structure and convenient in manufacture. Each lateral slip steel rail system and each vertical slip steel rail system are stable in structures. Therefore, the net-rack bed-jig platform smoothly and stably slips so that the advantage of improving slip engineering efficiency is acquired.

The invention discloses a low-noise mechanism and a lock with the same. The low-noise mechanism comprises a rack (1). One end, in the length direction, of the rack (1) is mounted on a spring bolt component (10); the rack (1) is meshed with a transmission gear (6); an energy-storage flywheel (7) is fixedly arranged on and is coaxial with the transmission gear (6). The lock with the low-noise mechanism comprises a lock shell, the spring bolt component (10), a driving component and the low-noise mechanism. The lock shell is provided with a faceplate. A spring bolt hole is formed in the faceplate. The spring bolt component (10) comprises a spring bolt and a guide plate fixedly connected with the spring bolt. The driving component is used for driving the spring bolt component (10) to extend or retract. By the low-noise mechanism, the technical problem that noises are generated due to the fact that abnormal sounds are caused during collision between the spring bolt and a pin hole of a door fame when the spring bolt extends in the prior art is solved.

The invention discloses a full-automatic anti-swing control system of a stereo garage. The stereo garage comprises a frame body, wherein the frame body is provided with a plurality of vehicle carrying mechanisms which can do cyclic motion and of which the bottom parts are made of iron. The full-automatic anti-swing control system of the vehicle carrying mechanisms comprises an electromagnet, wherein the electromagnet is connected with a power supply through a control circuit; a plurality of plug holes are vertically formed in the electromagnet; one upright post is inserted in each plug hole; all upright posts are arranged on the ground under the lowest position where the bottom part of each vehicle carrying mechanism on the frame body can move to; gaps are reserved between the top surface of the electromagnet and the lowest position where the bottom part of each vehicle carrying mechanism on the frame body can move to. The full-automatic anti-swing control system of the stereo garage, disclosed by the invention, has the advantages that the vehicle carrying mechanisms are accurately located, and parking is convenient; shaking and collision cannot be caused during parking, and no abnormal sound is generated; the problems of switch failure, deformation of the vehicle carrying mechanisms and the like caused by frequent swinging of the vehicle carrying mechanisms can be effectively prevented, and the service life of the stereo garage is prolonged.

The invention provides a mounting structure for an automobile door lock, and belongs to the technical field of automobiles. The mounting structure solves the problems that a door handle and door lock pull wires of an automobile cannot be assembled easily and time and labor are consumed in the prior art. The mounting structure for the automobile door lock comprises door lock pull wires, a door handle, a fixed base and a door guard board which is mounted on an automobile body. The door guard board is provided with a mounting cavity, the door handle is located on one side of the door guard board and hinged to the door guard board, and the other side, facing the door guard board, of the mounting cavity is opened. The fixed base is arranged in the mounting cavity, and the fixed base is provided with sliding columns in a sliding mode. The door handle is fixedly connected with a shifting piece which can drive the sliding columns to slide on the fixed base when the door handle is pulled, and one end of each door lock pull wire is connected to the corresponding sliding column. The mounting structure for the automobile door lock has the advantage of being convenient and fast to mount.

The invention relates to a light source framework and a backlight module. The light source framework comprises a border, an edge strip and a reflector plate, wherein the edge strip is arranged on the border and provided with at least one positioning hole; the reflector plate comprises a first surface and a second surface; the first surface is an optical reflector surface, and the second surface is provided with at least one hook; and the hooks are matched with the positioning holes and used for fixing the reflector plate onto the edge strip. By adopting the invention, the production efficiency of the backlight module can be improved and the production cost is lowered.

The invention discloses a seat frame front lifting mechanism for a car seat. The seat frame front lifting mechanism comprises two groups of connecting rod assemblies which are arranged face-to-face, wherein a synchronous drive rod is connected between the two groups of connecting rod assemblies; the synchronous drive rod is provided with a drive handle; the drive handle is connected with a power device; the connecting rod assemblies comprise upper connecting rods and lower connecting rods; the lower ends of the upper connecting rods fixedly sleeve the synchronous drive rod; the upper ends of the lower connecting rods movably sleeve the synchronous drive rod; the power device comprises a screw rod motor; a housing of the screw rod motor is hinged to a supporting seat by a supporting lug; a screw rod of the screw rod motor is hinged to the drive handle; and the supporting seat is fixed onto the seat frame of the car seat. After the seat frame front lifting mechanism for the car seat is adopted, when the screw rod of the screw rod motor shrinks, the screw rod pushes and pulls the drive handle, so that the synchronous drive rod swings; the upper connecting rods fixedly connected to two ends of the synchronous drive rod rotate, the lower connecting rods hinged to the upper connecting rod rotate, the angles between the upper connecting rods and the lower connecting rods are changed, and the whole heights of the upper connecting rods and the lower connecting rods are changed, so that the aim of lifting is achieved.

The invention relates to a method for installing and unlocking a locking mechanism in a sliding seat of a car seat. The installations steps include connecting a button bushing in a bushing hole of anupper sliding rail in the sleeve mode; inserting the button into the button bushing from bottom to top so that the upper end of the button stretches out of the surface of the upper sliding rail, installing a locking clamp plate obliquely into an upper sliding rail slot, then leveling, inserting the lower end of an insert into a center hole of the clamp plate, clamping a clamp plate boss into a button groove, riveting the lowermost end of the insert, fixing the locking clamp plate and finally installing a locking spring. The unlocking steps include operating a handle to directly rotate a hingeplate to press the button, so that the locking mechanism integrally moves downward to be unlocked. The method is reasonable in structure design, the installation and unlocking steps are convenient andreliable, and the handle and the locking mechanism can be provided for a customer as a whole, and the installation is convenient. The locking clamp plate cannot move left or right randomly, and has no abnormal noise. After unlocking, the unlocking of the locking mechanism can be limited.

The invention relates to transmission shafts in vehicle parts, particularly to a shaft sleeve type cross shaft. The shaft sleeve type cross shaft comprises a cross shaft frame; a cross oil channel and an oil inlet channel are formed in the cross shaft frame; the oil inlet channel is communicated with the cross oil channel; sealing rings, shaft sleeves and shaft sleeve seats sleeve four shaft heads respectively. The shaft sleeve type cross shaft is characterized in that the rear end of every shaft head is provided with a stop shaft shoulder; the front end of every shaft head is of a step structure; the inner circle surfaces of the shaft sleeves are provided with a plurality of oil grooves; the sealing rings abut against the stop shaft shoulders of the shaft heads; the shaft sleeves and the shaft heads are assembled separately; the shaft sleeves and the shaft sleeve seats are assembled in an interference mode; the shaft sleeve seats and the shaft head step surfaces form oil storage chambers; the oil grooves formed in the shaft sleeves are communicated with the oil storage chambers. The shaft sleeve type cross shaft has the advantages of being simple in structure, convenient to install, good in lubrication effect, free of abnormal noise and abrasion, abrasion-resistant and durable and suitable for improvement of transmission shaft universal joints of various vehicle models.

The invention relates to a composite salt spray corrosion test box, comprising a box body (1), a spray system, a mist removal system and an electrical system. The box body (1) is provided with a box cover (2), and the box body (1) There is a working chamber (3), a sample rack (4) is arranged in the working chamber (3), the spray system includes a spray tower (5), a salt water tank (6) and a saturated barrel (7), and the spray tower (5) is provided with There are nozzles, the water inlet of the nozzle is connected to the water outlet of the peristaltic pump through a pipeline, a valve is installed at the water inlet of the nozzle, the water inlet of the peristaltic pump is connected to the water outlet of the brine tank (6) through a pipeline, and the air inlet of the nozzle is connected to the saturated bucket (6) through a pipeline. 7) The air outlet, the spray system, the defogging system, and the peristaltic pump are respectively connected to the electrical system; compared with the prior art, the present invention not only has a high degree of automation, is safe and reliable, but also has a lower flow spray function, which can realize partition control, It has the effect of saving energy and reducing consumption.

The invention provides a method for assembling a frame of an invisible sound box, comprising the following steps of: S1, making a mould in the preset structure of the invisible sound box, and ejectingintegrated installing tubes according to the mould, wherein glue grooves in staggered arrangement are arranged in two ends of the installing tubes; S2, filling the glue grooves of every two installing tubes with glue for adhesion, so as to form a square frame of the invisible sound box; S3, embedding the frame of the invisible sound box in a reserved wall body installing position which is 3mm-5mmlower than the wall; S4, plastering gaps around the frame of the invisible sound box; S5, putting and fixing the invisible sound box in a reserved invisible sound box installing position within the frame of the invisible sound box, and coating the surface, towards the audience, of the frame of the invisible sound box with acoustic fiber powder as well as a decorative material. The concealed method for assembling the frame of the invisible sound box provided by the invention realizes an installation method of a durable frame of the invisible sound box, and the frame is capable of moisture andtemperature change resistance.

The invention relates to a damping telescopic pen and a manufacturing method thereof, in particular to a product which changes the total length by the telescopic action of an inner tube when two sections of metal tubes with different calibers are sleeved together as well as a manufacturing method thereof. The damping telescopic pen is provided with two sections of metal tubes with different calibers, wherein an inner flange is arranged at the upper tip of the outer tube; the inner tube is inserted in the outer tube, the upper end of the inner tube extends outwards from the inner flange at the upper end of the outer tube and is provided with a plastic pen cap; a plastic piston which is contacted with the inner wall of the outer tube is arranged at the lower tip of the inner tube; the piston is blocked by the inner flange of the outer tube; a plastic pen point is arranged at the lower end of the outer tube; and a plastic core shaft which is integrated with the pen cap and the piston is arranged in the inner tube. The pen cap and the piston are directly and fixedly connected by the core shaft and the inner tube, thereby achieving good firmness; and meanwhile, the influence to the appearance caused by overflow adhesive is avoided, and the problems of low production efficiency and instable quality are solved.

The invention discloses a fixed abnormal sound-preventing clamping mounting structure, including a vehicle body mating surface, an end cap and an outer tube, and being characterized in that the outertube is fixedly connected with the end cap by rivets, the outer tube is a hollow cavity, a fixed shaft is arranged inside the outer pipe, one end of the fixed shaft is fixedly connected with the end cap, the surface of the other end of the fixed shaft is sleeved with a rotary sleeve, the surface of the rotate sleeve is sleeved with an inner tube, the end cap is connected with a rotary buckle, anda spring is arranged at the gap between the rotary buckle and the end cap. The mounting structure is used for mounting a shutter curtain and the vehicle body, the thumb compresses the rotary buckle tothe bottom before the shutter curtain is installed, at the moment, the spring is compressed to the bottom, then the shutter curtain is mounted on the vehicle body from top to bottom, until front andrear elastic limiting sleeves of the shutter curtain are in zero contact with the front and rear sides of a vehicle body mounting groove, at this moment, the thumb is released to allow the rotary buckle to rebound freely, the rotary buckle and the vehicle body mating surface are pushed tightly, and the outer tube and the end cap are fixed by the rivets, so as to avoid the common abnormal sound phenomenon of such products.

The invention relates to an automobile panoramic sunroof mechanical group. A front lifting arm support pin is hinged to a front driving sliding block, a front driving sliding groove is formed in the middle of the front driving sliding block, a limiting guide head arranged on a skylight rail in a guiding mode is arranged on the rear portion of the front driving sliding block, and the limiting guidehead is arranged in a front driving limiting section on the skylight rail. The front drive limiting section is composed of a front-back rear descending guide rail section and a rear-back guide rail section, a sliding foot arranged in a skylight guide rail in a guiding mode is arranged on the rear drive sliding block, a front sliding block drive pin arranged in a front drive sliding groove in a guiding mode is arranged at the front end of the rear drive sliding block, and a rear warping drive sliding groove lifted from front to back is formed in the middle of the rear drive sliding block. Therear portion of the rear drive sliding block is in pin connection with a warping support pin, a warping drive pin is connected into the rear warping drive sliding groove in a limiting and penetratingmode, the warping drive pin is in pin connection with the front side of the lifting arm rear support, and the warping support pin is connected into a warping support sliding groove in the middle of the lifting arm rear support in a limiting and penetrating mode. The mechanical set is simple in structure and can effectively guarantee stable and safe supporting of the skylight.

The invention relates to a VVS engine rotary variable-valve-timing structure. The structure comprises a camshaft, an exhaust rocker arm assembly, a high-speed air inlet rocker arm and a low-speed airinlet rocker arm, and further comprises a synchronous torsional spring, a synchronous plug, an electromagnet and a reset compressed spring. The fixed end of the synchronous torsional spring is fixedlyconnected with the low-speed air inlet rocker arm, the working end of the synchronous torsional spring is fixedly connected with the high-speed air inlet rocker arm, in this way, when an engine worksat a low speed, the high-speed air inlet rocker arm does not make contact with a high-speed air inlet cam of the camshaft, and the camshaft cooperates with the low-speed air inlet rocker arm througha low-speed air inlet cam. The synchronous plug is used for controlling the cooperation state between the high-speed air inlet rocker arm and the high-speed air inlet cam, and comprises a first stepped shaft, a second stepped shaft and a transitional frustum which are arranged coaxially, the second stepped shaft is arranged inside the high-speed air inlet rocker arm, and the reset compressed spring is arranged at the other end of the second stepped shaft. The overall structural size of the structure is small, the manufacturing precision is low, and abnormal sounds are avoided during working.

The invention provides a handle assembly of a door body of a refrigerating and freezing device and the door body of the refrigerating and freezing device. The handle assembly comprises a handle and an assembly part. The handle comprises a handle groove body, a decorative plate and a first connecting plate. The assembly part comprises a rear stop plate which is arranged at the front side of the handle groove body and the lower side of the first connecting plate and abuts against the handle groove body in a contact manner, a lower stop plate which extends forwards from the rear stop plate, and a foaming material channel; a connecting space is formed among the lower stop plate, the rear stop plate, the first connecting plate and the decorative plate; and the foaming material channel is communicated with a foaming space and a connecting space of the door body of the refrigerating and freezing device, so that a foaming material in the foaming space enters the connecting space during foaming. The decorative plate can form a bright surface, the connecting space is formed between the handle and the assembly part, and during foaming, the foaming material in the foaming space can enter the connecting space, so that stable connection of the handle assembly and the door body is realized, shaking, abnormal sound and flash seams are avoided, mold clamping lines are avoided, and appearance defects such as shrinkage are avoided, and the cost is low.

The invention discloses an integrated machine for machining of FC-3 aluminum rails. A jack horse is included, and two fixtures are arranged on the front and the rear of the jack horse; the two fixtures are provided with a clamping device, and the jack horse is provided with a clamping cylinder; the clamping cylinder drives the clamping device to clamp the two fixtures; a first sliding table and two first drilling machines are arranged on the left side of the jack horse; a second sliding table and two second drilling machines are arranged on the right side of the jack horse; a first propellingcylinder pushing the first sliding table and the second sliding table to move up and down are arranged on the upper side of the jack horse; two milling cutter motors are arranged on the lower side ofthe second sliding table; a third sliding table and a broaching and reaming machine are arranged on the left side of the jack horse in a horizontal moving manner; a second propelling cylinder pushingthe third sliding table to move leftwards and rightwards is arranged on the left side of the jack horse; a port engraving motor and a combined port engraving cutter are arranged on the lower side of the jack horse; and pneumatic sources of the clamping cylinder, the first propelling cylinder and the second propelling cylinder are provided by a gas station. According to the integrated machine for machining of the FC-3 aluminum rails, a left aluminum rail and a right aluminum rail are machined at the same time, the cooperation degree is good, and the position is accurate; and after skylight assembling is completed, no abnormal sound exists.

The invention relates to an elevation-depression angle regulating mechanism for a fan. The elevation-depression angle regulating mechanism is characterized by comprising a pivot, a left movable support, a right movable support, a first group of friction plates, a second group of friction plates, a first group of poly-oil friction plates, a second group of poly-oil friction plates, a set of elastic shims, a flat gasket, an end sealing piece and a fixed support, wherein the pivot is provided with a waist-form shaft lever; the fixed support is provided with two supporting parts and the two supporting parts are positioned along radial direction relative to the waist-form shaft lever; one friction plate of the second group of friction plates is provided with a positioning bulge; the right movable support is provided with a track groove; the positioning bulge is positioned in the track groove and can slide; the waist-form shaft lever is fixed by the end sealing piece after successively passing through one supporting part, the first group of friction plates, the first group of poly-oil friction plates, the left movable support, a set of elastic shims, the second group of friction plates, the second group of poly-oil friction plates, the right movable support, the other supporting part and the flat gasket; the first group of friction plates and the second group of friction plates can not radially rotate relative to the waist-form shaft lever; the left movable support and the right movable support can radially rotate relative to the waist-form shaft lever; and the regulating mechanism provided by the invention has the advantages that a positioning range of mechanism angle is large, a positioning angle range is adjustable, security and reliable stepless angle positioning can be realized, no noise exists and hand feeling is good during the elevation-depression operation, structure is simple, assembly is convenient and service life is reliable.

The invention discloses a vibrating diaphragm for a sound production device and the sound production device. The vibrating diaphragm is obtained by adding a filler, a structure control agent and a cross-linking agent into a basic polymer, mixing, and molding at 80-200 DEG C, wherein the base polymer comprises one or more phenyl-containing siloxane polymers, and the content of phenyl in each phenyl-containing siloxane polymer is 0.5%-75% by weight; and the damping of the vibrating diaphragm is 0.1 to 0.6. Damping of the vibrating diaphragm can be improved, and distortion of the sound production device can be reduced.

The invention discloses a range hood controlling method making an impeller free of manual maintenance. The method comprises the following steps that (1) a range hood is started for the first time; (2)a motor of a fan of the range hood is rotated forwards or reversely, according to the formula that M is equal to I*B, wherein M represents the impeller mass, n represents the rotation speed of the motor, I represents the rotational inertia, B represents the angular acceleration, the mass M<1> of the impeller at the first start is thus obtained, and the normal operation of the range hood is kept until the range hood is shut down; (3) the range hood is started for the (t)th time, wherein t is greater than or equal to 2, the motor is rotated forwards or reversely, the mass M<t> of the impeller at the (t)th start is recorded, and the mass M<t> is transmitted to a power supply board; (4) the power supply board performs analysis to obtain that the mass change delta m of the impeller is equal toM<t>-M<t-1> when the range hood is started for the (t)th time and the (t-1)th time; (5) the power supply board determines that the rotation speed needs to be increased by delta n according to the relationship between the impeller mass and the rotation speed of the motor, and the power supply board determines that the rotation speed needs to be increased by delta n1 according to the relationship between the impeller mass and the aerodynamic loss; and (6) finally, the rotation speed N is increased to the rotation speed generated after delta n and delta n1 are corrected, and then the aerodynamicperformance of the fan is compensated.

The invention discloses an all-nodular cast iron well lid for electric power engineering. The well lid comprises a flange plate face, a disc frame, an embedded adhesive tape, elastic locking devices and a plug. The well lid is closely combined with a well frame without abnormal sound, and grains on the surface of the well lid increase the resistance of the well lid and achieve a diversion effect on rainwater in special rainy and snowy weather; the adhesive tape inside the well frame can reduce vibration generated when a vehicle passes through the well lid, and further reduce abnormal sound; the elastic locking devices enable the well lid to tightly fit the well frame, displacement and accidental opening of the well lid are prevented, and the burglary prevention function is further achieved; for constituting materials of the well lid, vermiculate cast iron has good stretch resistance, impact resistance, ductility and tenacity and a great heat conduction effect, and plays an important role in protecting internal electric power facilities.

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 an automobile seat bilateral recliner synchronizing structure. One end of a transmission rod (2) is provided with a profile block (3). The transmission rod (2) is fixedly connected with a recliner (1) through the profile block (3). The other end of the transmission rod (2) is welded with a handle of the recliner. By the synchronizing structure, synchronous, abnormal-sound-free and tooth-sliding-free bilateral recliner (1) unlocking is achieved, and personal safety hazard, caused by recliner failure, of passengers during automobile collision is prevented.

The invention discloses a smoke deflector lifting mechanism for an extractor hood. The smoke deflector lifting mechanism comprises an installation frame, an electric push rod device, a lifting connection device and a smoke deflector, wherein the electric push rod device is arranged on the installation frame; the lifting connection device is arranged at an output end of the electric push rod device; and the smoke deflector is arranged at the bottom of the lifting connection device. The smoke deflector lifting mechanism is characterized in that counterweight devices for counteracting the influence of load gravity of the lifting mechanism are arranged at two sides of the installation frame. The smoke deflector lifting mechanism has the advantages that the counterweight devices for counteracting the influence of load gravity of the lifting mechanism are arranged at two sides of the installation frame, and the lifting mechanism is capable of counteracting the influence of the load gravity when the lifting mechanism moves up and down, so that 'zero load' is achieved, stress is uniform, the power of a drive motor is reduced, the lifting mechanism is not in a 'gravity-free' condition especially when moving downwards, smooth motion is kept, noise and abnormal noise are not generated, and furthermore, the lifting mechanism has the same ascending and descending speeds.

The invention is applicable to the technical field of door and window accessories, and discloses a pulley body of a door and window pulley and a door and window pulley. The pulley body of the door andwindow pulley comprises a bearing, a rigid ring and a buffering ring arranged between the bearing and the rigid ring, wherein the inner side of the buffering ring is connected with the outer side ofthe bearing, and the outer side of the buffering ring is connected with the inner side of the rigid ring. The door and window pulley comprises a base and a connecting shaft, and also comprises the pulley body, wherein the connecting shaft penetrates through the bearing of the pulley body and is connected with the base. According to the pulley body of the door and window pulley and the door and window pulley, the pulley body is provided with the rigid ring and the buffering ring is arranged between the rigid ring and the bearing, so that the door and window can still slide smoothly without sense of blocking and without abnormal noise under the situation of long-term use and non-sliding for a long time, so that the use experience is excellent, and the defects that the existing plastic pulleyis easy to integrally deform or to generate local indentation under the pressure, the metal pulley is high in cost and is non-restorable after deformation and loud in noise can be overcome.

The invention provides a method for preparing a graphene electrothermal film based on a flexible porous fiber material. The preparation method comprises the following steps of: directly preparing a super-flexible self-supporting graphene conductive layer on the surface of a flexible porous material by adopting a laser-induced graphene method, then introducing a PI flexible conductive electrode, and finally performing super-flexible packaging with a textile fabric, thereby obtaining the super-flexible graphene electrothermal film.

The invention discloses a gas spring improving the shock absorbing effect of a bicycle front fork. The gas spring comprises a gas spring pipe body, a piston, a piston rod, cushion rubber and a seal base, wherein a gas nozzle is formed at the top end of the gas spring pipe body; the piston is slidably connected in the gas spring pipe body, and one end of the piston rod is fixedly connected to the piston while the other end of the piston rod extends out of the gas spring pipe body; the seal base sleeves the piston rod and is fixed in the gas spring pipe body; the cushion rubber sleeves the piston rod and is located between the piston and the seal base; a plurality of grooves are formed on the outer side wall of the cushion rubber in a concave manner; a first gas chamber is formed in a pipe chamber between the gas nozzle in the gas spring pipe body and the piston, and a second gas chamber is formed in a pipe chamber between the grooves of the cushion rubber and the gas spring pipe body. According to the gas spring disclosed by the invention, as two gas chambers are formed in the gas spring pipe body, the first being a positive gas chamber and the second being a negative gas chamber, a bicycle user can pressurize and decompress the positive / negative gas chambers according to a self-experience demand so as to adjust the sensitivity and comfort of the front fork.

The invention discloses a semi-floating drive axle for an electric sightseeing vehicle and an electric cargo truck, which comprises a reducer, an axle case and an axle shaft, wherein the reducer is connected with the axle case through a bolt; a shaft I and a shaft II are arranged on two sides in a reducer box of the reducer in turn; the outer end of the shaft II is meshed with a bull wheel and the bull wheel drives a differential shell on one side to rotate; the outer side of the shaft I is connected with a shaft gear II and then connected with a key on the shaft II; and plate spring bases are welded on two sides of the axle case and are provided with damper support mounting holes. The semi-floating drive axle has the advantages that: a two-stage helical gear reducing mechanism is arranged in a main reducer, and various speed ratios are designed by adjusting the tooth number, modulus, helical angles and modification coefficients of gears so as to meet the requirements on speed ratios of various vehicles; and under the condition of using the same reducer box, the various speed ratios can be realized by replacing gears, and under the condition of using the same axle case, the matching with various steel plate springs is realized by replacing the plate spring bases.

The invention relates to an automobile skylight sealing strip. The automobile skylight sealing strip is provided with a fixing part and a sealing part, the fixing part comprises a first fixing part and a second fixing part, fiber lines are embedded inside the first fixing part and an adhesive tape is arranged on the bottom surface, the sealing part is located above the first fixing part, and a buffer cavity is formed in the middle of the sealing part; the second fixing part is connected to the left side wall of the first fixing part, the second fixing part is provided with a clamping groove, two side walls in the clamping groove are provided with fixing racks, the left side wall of the second fixing part is further provided with a lip, and the lower end of the second fixing part is provided with a bubble pipe; and the fixing part is made of EPDM dense glue with the hardness Shore A 70-90, and the sealing part and the bubble pipe are made of EPDM sponge glue with the density of 0.5-0.8g / cm<3>. The automobile skylight sealing strip has good sealing property and good deformation resistance, and can reduce abnormal sound.

The invention relates to the technical field of air purifiers, in particular to an air purifier with a built-in UV lamp and a built-in filter element placement structure. The product comprises a bottom cover which is an outer shell body with a retractable structure; a filter main body mechanism arranged in the outer shell body, clamped on the chassis and in a hollow cylindrical shape; the chassisarranged on the bottom cover in a clamping manner; a UV lamp mechanism arranged in the filter main body mechanism and arranged on the chassis; wherein the UV lamp mechanism comprises a UV lamp main body detachably arranged on the chassis, a UV lampshade which is arranged on the peripheral side of the UV lamp main body and is prepared from a material with an anti-UV index of F1 grade, and a UV lampshade end cover which covers the UV lampshade and is prepared from a material with an anti-UV index of F1 grade; and a wind wheel mechanism is arranged on the inner wall of the outer shell and arranged above the filter main body mechanism. The filter element and the UV lamp are convenient to disassemble, the disinfection effect is good, the service life is long, and the like.