324results about How to "Effective dustproof" patented technology

The invention relates to a solar heliostat transmission gear, which comprises an upper box body component, a lower box body component and a rotary mechanism which connects the upper box body component and the lower box body component into a whole, wherein, the rotary mechanism comprises a spline groove which is matched and connected with a lower worm wheel shaft in the lower box body component and is arranged in the center of an upper box body bottom surface of the upper box body component, and the lower worm wheel shaft drives the upper box body component to move through the spline groove. Moreover, a gap fine adjustment structure is respectively arranged on both shaft ends of an upper worm wheel shaft in the upper box body component and the lower worm wheel shaft in the lower box body component and comprises an end bearing, a transparent cover and a threaded sleeve, wherein, the end bearing is arranged on the end part of the upper worm wheel shaft or the lower worm wheel shaft; the transparent cover is fixed together with an upper box body or a lower box body, and an inner ring of the transparent cover is provided with threads; and the threaded sleeve is arranged inside the transparent cover and externally provided with threads which are matched with the threads of the inner ring of the transparent cover, and tightly presses on the end bearing. The solar heliostat transmission gear not only has simple transmission form, high transmission efficiency and good maintainability, but also has long service life and low manufacturing and maintenance costs.

The present invention discloses a keyboard which comprises a housing and the following components in the housing: a thin-film circuit, a keyboard frame, a keyboard film and a keyboard base board. The keyboard base board is provided with a plurality of key caps which are adapted with contacts on the thin-film circuit. The keyboard film is provided with inner concave accommodating parts which are respectively adapted with each key cap. The keyboard frame is mounted on the housing through clamping mounting. The keyboard frame is buckled on the key caps and furthermore the keyboard film is pressed to abut against the keyboard base board through the keyboard frame from top to bottom. According to the keyboard of the invention, the keyboard film is buckled on the key caps and furthermore is pressed to abut against the keyboard base board through the keyboard frame from top to bottom. On condition that the keyboard function and the hand feeling do not reduce, a totally waterproof and dustproof function is realized. Furthermore falling-off of the key cap can be prevented thereby ensuring high use safety of the keyboard and obtaining better appearance effect.

The invention belongs to the field of automotive loading equipment for bulk materials, and particularly relates to an automotive loading gate which is adjustable in material flow rate, flow velocity and the heights of the gate and a carriage. The automotive loading gate is provided with a hydraulic flat-slab gate, an inner chute, a swinging chute and a telescopic chute in sequence from top to bottom and along a material flow direction. The automotive loading gate is characterized in that a feeding opening of the hydraulic flat-slab gate is matched with a bin opening of a stock bin; a discharging opening of the hydraulic flat-slab gate is matched with the inner chute; one end of the swinging chute is sleeved at the outer side of the inner chute and swings around a rotating shaft fixedly arranged on a left side plate and a right side plate of the inner chute; and the telescopic chute is sleeved at the inner side of a discharging opening end of the swinging chute. Through regulating the openness extent of the gate, the material flow rate is regulated; through regulating the angle of the swinging chute, the material flow velocity is controlled; through regulating the extension and the shrinkage of the telescopic chute, a loading height is regulated; and through the regulation measures, the loading requirements of different vehicle types are met.

The invention provides a device for preventing wind, sand, snow and dust, and the method is used for solving the problem that in the prior art, along with the increase in blocked sand soil quantity or blocked snow quantity and the like, the sand-resisting, windproof, dustproof or snow-resisting effect of a protecting net is obviously reduced, and therefore sand prevention, wind prevention, dust prevent or snow prevention cannot be carried out finally. The device for preventing wind, sand, snow and dust comprises a screen plate and a screen plate rack body, wherein two ends of the screen plate rack body are respectively provided with a first mounting hole and a second mounting hole, a first upright column is connected with one end of the screen plate rack body and provided with N first gear holes; a second upright column is connected with the other end of the screen plate rack body; one end of the screen plate rack body passes through the first mounting hole and the first gear hole by virtue of a first fixing piece and is fixed together with the first upright column; and the other end of the screen plate rack body passes through the mounting hole and the second gear hole by virtue of a first fixing piece and is fixed together with the second upright column. The device for preventing wind, sand, snow and dust has the advantage that the height of the screen plate can be increased so as to better perform protection.

A waterproof and dustproof self-radiating type motor-driven automobile direct current voltage changer comprises a radiating shell, a radiating cover plate, side sealing plates, a circuit board, a transformer, a coil, a Schottky diode and a field effect tube, wherein the circuit board is arranged in the radiating shell, the transformer, the coil, the Schottky diode and the field effect tube are respectively fixed on the inner side surface of the radiating shell, the radiating cover plate is fixed on the radiating shell in a sealing way, the side sealing plates are fixed at two ends of the radiating shell in the sealing way, and input-output lead bundles pass through a cable diminishing head and are led from the side sealing plates. As the changer adopts a completely-sealed structure, aluminum plates are coated on three surfaces of the transformer, and then the transformer coated by the aluminum plates are arranged on the radiating shell, motor-driven automobile direct current voltage changer with the structure not only solves the problem that the original automobile-mounted storage battery high voltage is converted to the 12V direct voltage, also can solve the problem of radiating of circuit elements and devices, and simultaneously is waterproof and dustproof; and the service life of the motor-driven automobile direct current voltage changer is prolonged.

The invention discloses a packing device of fuel battery motor with sealing packing rack, which comprises the following parts: ventilating hole, ventilator, air filter inlet, radiator pipe inlet and outlet, electric pile air tail gas drainage hole, electric pile intermittent hydrogen tail gas drainage hole, cistern watering hole and drainage hole; wherein the hydrogen detector is set in the ventilating hole, which extends a ventilating pipe outwards; the ventilating fan is set on the ventilating pipe, which extends a ventilating pipe with aerator outwards. The invention can detect hydrogen density to discharge hydrogen disposal timely, which avoids explosion due to hydrogen pipe cracking.

The invention discloses a multifunctional teaching device which comprises a box. A storage groove with an upward opening is formed in the box, a cover plate is rotatably connected at the opening of the storage groove, a moving plate in transverse arrangement is arranged in the storage cell, the upper end of the moving plate is rotatably connected with a demonstration plate through a rotating block, a groove matched with the rotating block is formed in the side wall of the upper side of the moving plate, the side wall of the rotating block is fixedly connected with an annular rotating block, the inner wall of the groove is provided with an annular rotating groove matched with the annular rotating block, a first rotating groove in vertical arrangement is formed in the box, and a first threaded rod is rotatably connected in the first rotating groove. The multifunctional teaching device is simple to operate and convenient to use; the demonstration plate is arranged in the box for effectivedust prevention and can rotate freely in the device, so that convenience is brought to students for clearly seeing the teaching process on the demonstration plate, and teaching quality is improved; by internally arranging liftable universal wheels, convenience is brought to moving and braking the device.

The invention discloses a lamp belt connecting assembly and a high-voltage flexible LED lamp belt applying the same. The lamp belt connecting assembly comprises male plugs, female plugs, connectors and a tail plug. According to the high-voltage flexible LED lamp SMD lamp belt, the length of the needed lamp belt can be acquired by the fact that lamp belt units are spliced freely according to actual needs by a customer, the male plugs or the female plugs are arranged at the head ends and the tail ends of the lamp belt units in the using process, and mutual butt joint of two lamp belt units is achieved through the male plugs and the female plugs, so that a plurality of lamp belt units can be connected front and back conveniently, and meanwhile the fact that one unit of the high-voltage flexible LED SMD lamp belt is scrapped due to wrong position shearing can be avoided. In addition, according to the lamp belt connecting assembly, assembling and disassembling are simple and convenient, an assembling structure is compact, waterproof and dustproof performance can be effectively achieved, and the using risk of the high-voltage lamp belt is lowered.

A button device comprises a casing, a button and a switch component. The casing is provided with a button hole, and a clamping portion which surrounds the button hole in a circle and axially extends along the button hole is arranged on the inner side of the casing. The button is held in the button hole, one end of the button is provided with a stopping portion, and the stopping portion surrounds the outside of the button in a circle, stops the button from separating from the button hole and is provided with a matching portion. The matching portion surrounds in a circle and is clamped with the clamping portion. The switch component is held in the casing to press the button, so that the button deforms elastically and is abutted against the switch component to trigger a switch module. By arranging the clamping portion extending along the button hole axially on the casing and arranging the matching portion clamped with the clamping portion on the button, the button device is effectively waterproof and dustproof.

The invention relates to a heat dissipation housing, which mainly solves the problems that an existing housing is poor in heat dissipation effect and does not have effectively waterproof and dustproof functions. The heat dissipation housing includes a shell and a bottom cover, the shell includes a top plate, a bottom plate, and a front plate, a first side plate, a rear plate and a second side plate which are connected end to end in sequence, the front plate, the first side plate, the rear plate and the second side plate are connected between the top plate and the bottom plate, thereby forming a cavity used for bearing a heat emission device, the shell is connected with the bottom cover through a sealing ring, a sealing ring installing groove is arranged on the connecting face of the shell and the bottom cover, the sealing ring is arranged in the sealing ring installing groove, a first connecting hole matched with the shell is arranged in the sealing ring, a second connecting hole matched with the shell is arranged in the bottom cover, by adoption of the technical scheme, the problems are well solved, and the heat dissipation housing can serve as a housing of a DC/DC converter.

The invention relates to a waterproof cable tail clamp for a circular electric connector, wherein a nut is arranged on one end of a sleeve through a shell retainer ring; an inner cavity of an opening of the sleeve is provided with an 'O'-shaped ring; a set screw is arranged on the nut; the nut is closely connected with a plug or a socket; and an inner cavity on one end of the sleeve is provided with a lining provided with a tooth opening, and an inner cavity on the other end of the sleeve is provided with a rubber gasket of which both surfaces are provided with gaskets for limitation, wherein a hold-down ring is arranged on one gasket on an opening part of the sleeve, and a hold-down nut is sleeved outside the opening of the sleeve. The waterproof cable tail clamp hermetically connects the electric connector and a cable into the sleeve, has good sealing performance, is effectively waterproof and dustproof, can avoid damage of the cable due to severe bending, and is convenient to insert and maintain.

The invention relates to an angle grinder which comprises a gearbox, a rotor, a rotor front bearing, a rotor rear bearing, a bearing box, an output shaft, an output shaft bearing and a lock pin, wherein one end of the output shaft is fixedly connected with a grinding wheel piece of the angle grinder by penetrating through the bearing box, and the other end is fixedly connected with a big gear; the big gear is meshed with a small gear fixed on a rotor front end shaft; the outer side of the rotor rear bearing is connected with a wild shield and a stator; both the wild shield and the stator are sleeved on a rotor front end shaft; elastic oil seals are additionally arranged between the rotor front bearing and the rotor front end shaft and between the output shaft bearing and the output shaft respectively; O-shaped seal rings are respectively sleeved on the lock pin of the gearbox and an end cover opening of the bearing box approaching to the side of the gearbox; a bearing aluminum sleeve is sleeved on the periphery of the rotor rear bearing; and a dust preventing ring is arranged between the rotor rear bearing and a rotor rear end shaft. The invention can effectively prevent dust, dissipate heat, reinforce the seal performance of the gearbox and prolong the service life of the bearings and the durability of gears.

The invention discloses a damping device for textile machinery, including a base, an upper cover, filter nets and a bearing plate. Base abutment blocks are uniformly distributed at the upper end of the base, and the lower end of the upper cover is fixed to the upper ends of the base abutment blocks. The filter nets are inserted between every two adjacent base abutment blocks. The bearing plate includes a disc body, a bearing plate convex column and a bearing plate insertion column. The bearing plate insertion column penetrates through the center of the base. Lower springs are crimped between the disc body and the base. Silicone telescopic tubes are installed between the lower end surface of the disc body and the upper end surface of the base through metal sleeves. The lower spring is located on the periphery of the silicone telescopic tube. Upper cover insertion columns are uniformly distributed on the lower end surface of the upper cover, the lower ends of the upper cover insertion columns penetrate through the disc body, and the outer peripheries of the upper cover insertion columns are sleeved with upper springs. The upper and lower ends of the upper springs abut against the upper cover and the disc body respectively. A telescopic joint is crimped between the upper cover and the disc body. The upper spring is located on the periphery of the telescopic joint, the filter net is located on the periphery of the upper spring and the lower spring. The damping device has obvious damping effect and long service life.

The invention provides a chemical instrument with a dustproof device, and belongs to the technical field of chemical instrument dust prevention. The chemical instrument with the dustproof device comprises a dustproof box, a protection box, two connecting blocks and an instrument body, wherein the protection box is fixed at the upper end of the dustproof box; the two connecting blocks are positioned on the front side of the protection box; the instrument body is fixed on the lower inner wall of the dustproof box; dustproof plates are movably hinged to the front ends of the dustproof box and theprotection box through hinges; dustproof glass is arranged at the front end of each dustproof plate; the dustproof glass is positioned on the front side of the instrument body; an instrument inner disc is arranged on the inner side of the instrument body; the front end of the instrument inner disc is rotatably connected with a pointer; and a slideway is formed in the front end of each dustproof plate. The chemical instrument with the dustproof device aims to solve the problems that a chemical instrument is generally exposed out of chemical equipment, dust in air is prone to being attached tothe chemical instrument, internal numerical values of the chemical instrument are not easy to see clearly and the quality of chemical products in the production process in the prior art is affected.

The invention discloses a proximity switch with a damping function, comprising a shell and a mounting plate, wherein the mounting plate is arranged above the shell, wherein a storage groove having anopening downward is provided in the shell, a proximity switch is arranged in the storage groove, the upper side wall of the shell is fixedly connected to the mounting plate by a fixing device, the upper end of the proximity switch is connected with a wire, a through hole matched with the wire is provided in the shell, two sets of first sliders and second sliders are symmetrically arranged on two side walls of the proximity switch, and first chutes matched with the first sliders and the second sliders are provided in the two inner walls of the storage groove. The proximity switch is easy to operate and convenient to use. The proximity switch is effectively protected by the shell, so that the service life of the proximity switch is prolonged. The shell is easy to mount and detach, which is convenient for inspection and replacement, and improves the work efficiency.

A telescopic laser TV cabinet of the present invention comprises a cabinet body, a laser TV or an ultra-short-focus projector is arranged in the cabinet, a receiving box with a top opening is arranged in the cabinet, and the laser TV or the ultra-short-focus projector is placed in the receiving box Inside, there is an outlet of the storage box on the front side wall of the cabinet, and an electric telescopic rod is connected to the rear of the storage box, and the electric telescopic rod is connected to a controller. output port or USB voltage output port connection. The beneficial effect is: it can effectively prevent dust, and has a good heat dissipation effect, can effectively avoid the trouble of tedious adjustment after the installation position of the laser TV or the ultra-short-focus projector is moved, facilitates the installation of the screen, and has good market promotion value.

The invention discloses a hand rehabilitation exercise device for elderly patients with cerebrovascular diseases. The hand rehabilitation exercise device comprises a hollow cubic base body, a trainingcomponent arranged on the surface of the base body, a dustproof sterilization cover and a control component. The training component comprises a finger flexion and extension training component, a finger massage training component and a grip training component, which are respectively arranged on the front wall, the top wall and the left wall of the base body. The dustproof sterilization cover comprises three square cover surfaces, and can cover the three corresponding training components on the base body. The control component arranged in a hollow cavity of the base body is electrically connected with each training component and the dustproof sterilization cover. The hand rehabilitation exercise device for the elderly patients with the cerebrovascular diseases has the advantages that single-finger training, overall hand pressure training and grip training are integrated, so that the device is multifunctional to meet training needs of the patients.

A folded keyboard comprises first, second and third key-press parts. The second key-press part connects to the first rotated, so does the third to second part; wherein, when folded keyboard is drew state, the first key-press part is between the second and third parts; when folded keyboard is on operating state, the three parts are almost on same level.

A spraying environment-friendly energy-saving anti-explosion fan based on a shaft sump water source comprises a water tank substrate; a water wheel device is arranged on the water tank substrate and is connected with a wind wheel device by a belt; a high-pressure water spraying device is connected with the water wheel device and the wind wheel device; the technical scheme of taking the shaft sump water source as a power source and combining the functions of wind feeding and spraying of a high-pressure water spraying device, the water wheel device and the wind wheel device is adopted; the defects of high frequency of gas and coal dust explosion caused by electric sparks of a motor, high investment cost, complete demand on the system auxiliary project, large machine noise, poor radiating performance, short service life, low production efficiency, severe production labor environment, easily caused occupational diseases of operation staff and severe coal source waste of the existing coal-mining equipment used for the high-gas shaft are overcome; and the spraying environment-friendly energy-saving anti-explosion fan based on the shaft sump water source is suitable for various ventilation equipment for mine excavation, particularly the ventilation equipment for excavation of the high-gas protruded shaft coal layer.

The invention discloses a feeding mechanism of a neodymium iron boron magnetic field forming press. The feeding mechanism comprises a gearbox and a rack penetrating the gearbox. The gearbox is internally provided with a drive gear driven by a servo motor. The drive gear is engaged with one side of the rack. The gearbox is internally further provided with press wheels matched with the other side of the rack. Dust covers in closed connection with the gearbox are arranged at the end portions, stretching out of the gearbox, of the rack. According to the feeding mechanism, a drive mechanism in which the closed gearbox and the rack are matched is adopted for driving a powder box to linearly reciprocate, the dustproof requirement is low, the displacement speed and the stroke precision can be accurately controlled, the drive speed is higher, running is stable and reliable, and the maintenance rate is lower.

The invention relates to a structure arrangement of a pure electric light bus. Refitting is carried out on the three type chassis of the light bus of Sprinter. An engine and accessories attached to an original bus chassis, a cooling system, a fuel system and a speed changing box are removed; a gearing apparatus matched with an electronic control system and instruments are replaced; a vehicle controller, a drive motor, a motor controller, a power battery pack, battery control systems, a high-voltage distribution box, a vehicle-mounted charger, a water pump, a power steering pump, a brake booster pump and the like are added. The structure arrangement of the pure electric light bus fully utilizes the limited space of the refitted bus model, an electrical control system is arranged in an engine cabin, the classified arrangement is performed, and efficient waterproof, dustproof and tamper-proof requirement is met; the drive motor is arranged beneath a cab, the reasonable arrangement is realized on the premise of meeting national technical standards, and the requirements for waterproofness, dust prevention, anti-collision and heat dissipation of the motor are fully taken into consideration; the requirements for high capacity, high utility rate of space and expandability are fully considered as to the design of battery boxes, and the requests of national technical standards are met.