45results about How to "Compact internal structure" patented technology

The invention belongs to the technical field of sample collection, and particularly relates to a seabed sediment columnar sample collection device and method. The collecting device comprises a rectangular-ambulatory-plane-shaped bearing base, bearing frames are installed on the bearing base, the multiple bearing frames are jointly connected with a circular base disc located at the center position above the bearing base, a pressure relief sampling mechanism is arranged on the circular base disc, and a height difference exists between the circular base disc and the bearing base. The pressure relief sampling mechanism comprises a circular sampling tube, and an opening of the sampling tube faces the bearing base and is coaxial with the circle center of the circular basal disc; a sawtooth annular disc with the same shape and size as the sampling tube is also mounted at the opening of the sampling tube. According to the invention, the unsmooth sample removal caused by large friction force between the inner wall of the sampling tube and a sample can be avoided through the removal-assisting molding device, so that the sample can be removed smoothly and completely, the sample removal difficulty of the sample is reduced, and the use effect of the device is improved.

The utility model discloses a battery pack, which comprises a shell assembly, a battery pack and a battery pack, the multiple cross beams are arranged in the containing cavity and are arranged at intervals in the first direction; the battery cell modules are arranged between any two adjacent cross beams, and each battery cell module comprises a first module and a second module which are mutually stacked in a second direction; the first cold plate is arranged in the containing cavity, the first cold plate is located between the first module and the second module and penetrates through the multiple cross beams, and the first direction is perpendicular to the second direction. The battery pack disclosed by the utility model can meet the required electric quantity requirement, and is compact in structure, high in space utilization rate and high in safety.

The invention discloses a preparation method and application of a composite 3D negative electrode current collector for a lithium metal battery, and belongs to the field of batteries, and the preparation method comprises the following steps: firstly, introducing a reduced graphene oxide artificial interface layer on the surface of the current collector through a chemical coating means, so that the reduced graphene oxide artificial interface layer and the current collector are tightly combined and are not easy to fall off after being bent due to chemical reaction in the process; and the conductivity and the ductility of the coated current collector are not greatly damaged. Then, on this basis, a three-dimensional micro-pit array structure with a lithium-loving oxide layer is introduced on the surface of the current collector by means of laser etching, so that the specific surface area of the current collector is increased, the surface current density distribution is adjusted, lithium metal is effectively induced to be uniformly deposited on the macro-scale and the micro-scale, and formation of lithium dendrites is inhibited; the lithium copper half battery assembled by the current collector has excellent cycle performance. The preparation process flow is simple, the composite 3D current collector with excellent performance is prepared, the cost is effectively reduced, and the production efficiency is improved.

The utility model discloses a rapid absorption core, and belongs to the field of absorption cores. A rapid absorption core comprises an absorber and a flow guide body, the absorber comprises first non-woven fabric, a wood pulp fiber layer and second non-woven fabric which are sequentially arranged, the flow guide body comprises a first fiber layer, a second fiber layer and dry paper which are sequentially arranged, and the dry paper is arranged on one side of the first non-woven fabric. The gram weight of the second fiber layer is larger than that of the first fiber layer. The liquid absorption device has the advantages of accelerating liquid absorption and improving the use experience.

The invention discloses a casting device for a mine car balance suspension shaft shell, and belongs to the field of metal casting. Comprising a base, an X-axis moving part connected to one side of the base, a Z-axis moving part fixedly connected to one side of the moving end of the X-axis moving part, a tilting part fixedly connected to one side of the moving end of the Z-axis moving part, and a supporting frame fixedly connected to one side of the rotating end of the tilting part. The mounting plate is connected to one side of the base and is used for fixing a mold; the mold splitting and closing part is used for realizing mold closing and mold splitting; the first Venturi mixing part can mix inert gas and a degassing agent discharged from the first discharging pipe, the inert gas and the degassing agent are fed into the first porous spray head through a hollow pipeline, and the mixture is sprayed out of the first porous spray head at the bottom of a steel ladle so that the degassing agent can chemically react with gas (especially hydrogen) in molten metal. And dissolved gases such as hydrogen and nitrogen in molten metal are effectively removed, the metal quality is improved, the solubility of the gases is reduced, and the gases are separated out and discharged.

The present invention discloses an intelligent cold storage, including an energy generation system, a cold storage system, a wind power adjustment system and a cold storage, wherein the energy generation system is respectively connected to a wind power generation device and a photovoltaic power generation device and a storage battery on a controller, the windmill of the wind power generation device is arranged on the top of the cold storage to obtain wind energy, and the photovoltaic components of the photovoltaic power generation device are arranged on the east-west direction of the outer wall of the cold storage to obtain solar energy; the cold storage system includes a cold storage plate arranged on the inner wall and inside of the cold storage, and a cold medium salt solution is arranged in the cold storage plate; the wind power adjustment system includes a DC fan arranged at the top of the cold storage, and the DC fan is connected to the controller to obtain power; the cold storage has a plurality of freezing chambers, and a freezing unit separated by a heat-insulating partition in each freezing chamber. The present invention provides an intelligent cold storage that makes full use of renewable energy and natural conditions, can generate electricity for use independently, improves the uniformity of internal airflow organization and the quality of stored food, and optimizes the internal structure.

The invention discloses a liquid cooling energy storage cabinet which comprises a main frame, the interior of the main frame is divided into an energy bin and an electric appliance bin which are mutually independent through a vertically-arranged partition plate, a battery rack is arranged in the energy bin, battery packs are detachably installed in the battery rack, a liquid cooling plate is tightly attached to the side face of each battery pack, and a flow channel is formed in each liquid cooling plate. The flow channels of the adjacent liquid cooling plates are connected in series through liquid cooling pipelines; an inlet and an outlet of the liquid cooling pipeline both extend to the electric appliance bin and are connected with an outlet and an inlet of the liquid cooling unit respectively, and the liquid cooling unit is fixed to a bottom plate of the electric appliance bin through a liquid cooling air conditioner support. Through the design that the liquid cooling plate is directly attached to the side face of the battery pack, the heat conduction path is extremely short, the advantages of high specific heat capacity and high heat conductivity of liquid are utilized, heat generated during charging and discharging of the battery can be rapidly and efficiently taken away, and the problem of low heat dissipation efficiency caused by low specific heat capacity and poor heat conductivity of air in air cooling is solved.

The utility model discloses a double-function spray gun which comprises a shell, an adapter pipe and a switching valve seat, a water spraying opening is formed in the front end of the shell, a water spraying face is arranged on the side face of the shell, a plurality of water spraying openings are formed in the water spraying face, the switching valve seat is arranged in the shell, and the switching valve seat is communicated with the water spraying opening and the water spraying openings. The adapter pipe is inserted into the shell, the front end of the adapter pipe is connected with the switching valve seat, the rear end of the adapter pipe is connected with the water supply pipe, a push button is arranged on the switching valve seat, and the water spraying opening or the water sprinkling opening can be switched and controlled to discharge water by shifting the push button. Compared with the prior art, rotation of the valve element is controlled through the push button, water outlet of the water spraying opening or water outlet of the water sprinkling opening can be switched, and operation is convenient and fast. And the water spraying openings can spray high-pressure water to clean stubborn stains, the water spraying area can be increased through a large number of water spraying openings distributed on the water spraying face, the cleaning device can be used for cleaning objects with large sizes, and the cleaning efficiency is greatly improved.

The invention discloses an epoxy resin anti-collision, anti-corrosion and wear-resistant material and a preparation method thereof, and the invention relates to the technical field of epoxy resin materials, comprising the following components in parts by weight: 2.5-4 parts of anti-corrosion filler, 1.8-2.5 parts of wear-resistant filler, 25-30 parts of epoxy resin, 10-15 parts of diluent, 1.5-2 parts of defoamer, and 1.5-2 parts of toughening agent; the diluent is a mixed solution of xylene and n-butanol in a volume ratio of 1:2. The epoxy resin anti-collision, anti-corrosion and wear-resistant material and a preparation method thereof, because graphene oxide itself has a two-dimensional flaky structure, bears a certain load in the epoxy resin matrix, disperses stress, and at the same time, modified zirconium oxide particles have higher hardness and strength, and the two act synergistically, so that the modified zirconium oxide fills the gap between the graphene oxide sheets, making the internal structure of the material more compact, reducing the penetration channel of corrosive substances, thereby improving the anti-corrosion performance of the epoxy resin.

The present application relates to a kind of cylindrical electrode paste and its preparation method.A kind of cylindrical electrode paste, by mass parts, including 15-20 parts of anthracite main material, 25-40 parts of residual anode, 3-10 parts of graphite fragment, 25-35 parts of coke, 15-30 parts of organic binder, 6-18 parts of bio-based binder. Among them, organic binder includes medium temperature pitch, anthracene oil, beta resin. Among them, bio-based binder includes carbonized hydrophobic composite modified wood bamboo powder, sodium carboxymethyl cellulose. The carbonized hydrophobic composite modified wood bamboo powder of the present application and sodium carboxymethyl cellulose are compounded to form a bio-based binder, which cooperates with the organic binder to ensure the bonding strength, high temperature resistance and electrical conductivity of the cylindrical electrode paste, while realizing the green and low-carbon utilization of biomass, solving the problems of high temperature failure, moisture absorption and easy caking, and many pores of traditional bio-based binder, reducing the resistivity and production cost, and improving the structural density and use stability.

The application provides an end cover device and an energy storage device. The end cover device comprises a bracket and a roller shutter. The bracket has a socket, a receiving cavity and a sliding groove. The socket is configured to expose a connector of the energy storage device. The socket is in communication with the receiving cavity. The sliding groove is in the form of a curved groove section in the receiving cavity. The roller shutter is in the form of a straight groove section in the socket. The roller shutter is arranged on the bracket and is configured to slide along the sliding groove. When the connector is not used, the roller shutter is slid to the straight groove section, and the roller shutter at least partially covers the socket. When the connector needs to be used, the roller shutter is in the curved groove section, the roller shutter is curvedly received in the receiving cavity, and the socket is avoided. The curved roller shutter can reduce the occupied space. Compared with a rigid translation structure, the roller shutter can leave more space through the curling, so that the internal structure of the energy storage device is more compact. Compared with a flip structure, the roller shutter can save the reserved space in front of the connector through the sliding. Even in a narrow scene, the roller shutter can successfully cover and expose the connector.

The invention relates to a smart energy management device, and relates to the field of energy management equipment, the smart energy management device comprises a cabinet body, a plurality of rows of placement grooves are formed in the cabinet body, the placement grooves extend in the length direction of the cabinet body, two electronic elements are arranged in each placement groove of the cabinet body, and the two electronic elements are oppositely arranged; connecting shells are arranged on the opposite sides of the two electronic elements, the two connecting shells are oppositely arranged, a connecting wire is arranged between the two electronic elements, the electronic elements slide in the containing groove of the cabinet body, two opening and closing doors are arranged on one side of the cabinet body, and a control piece used for controlling the position relation of the two electronic elements is arranged between the two electronic elements. The two electronic elements are close to each other, the two connecting shells are connected, and the connecting wires are contained in the connecting shells; when the opening and closing door is opened, the two electronic elements are far away from each other, the two connecting shells are far away from each other, and the connecting wires are tightened in the connecting shells. According to the invention, the control element is additionally arranged to reasonably deploy internal electronic elements, so that the working efficiency is improved.

The invention provides a mutton preservative and application thereof, and belongs to the technical field of preservatives, the mutton preservative comprises a component A and a component B. The component A comprises the following raw materials by mass: 10 parts of a clove extract, 2-8 parts of a cinnamon extract, 2-5 parts of a myrcia extract, 1-1.5 parts of tea polyphenol, 0.5-1 part of allicin and 0.8-1 part of calcium chloride; the component B is prepared from the following raw materials in parts by mass: 10 parts of chitosan, 3 to 5 parts of sodium alginate and 0.5 to 1 part of propolis. The mutton preservative disclosed by the invention is completely prepared from pure natural substances, sodium alginate and chitosan in the component B react with calcium chloride in the component A to form a gel film, and a clove extracting solution, a cinnamon extracting solution and a bay leaf extracting solution in the component A can also promote the sodium alginate to form a film through crosslinking, so that the formed gel film is smoother, the internal structure is more compact, and the mutton preservative has the advantages that the quality of mutton is improved; water evaporation is prevented, oxygen is isolated, and the fresh-keeping effect of the mutton fresh-keeping agent is effectively improved.

The invention discloses a compressed air pressure stabilizing supply storage tank, which belongs to the technical field of compressed air energy storage, and structurally comprises a tank body, a pushing disc is vertically and slidably mounted in the tank body, an I-shaped rotary drum is rotatably mounted in the middle of the pushing disc, and a center penetrating guide rod is fixedly mounted in the middle of the inner side of the tank body; the I-shaped rotating drum is arranged on the outer side of the center penetrating guide rod in a sleeving mode and is in transmission connection with the center penetrating guide rod through threads, a multi-stage telescopic guide rod is connected between the top of the pushing disc and the tank body, and a large-torque low-speed motor used for driving the I-shaped rotating drum to rotate is installed on the pushing disc; according to the storage tank, the extrusion force on compressed air stored in the tank body can be accurately controlled, the constant discharge speed of the compressed air is maintained, stable-pressure supply of the compressed air is guaranteed, and on the basis, the compressed air stored in the tank body can be fully discharged, so that the containing efficiency of the storage tank on the compressed air is improved.

The invention relates to the technical field of compression molding, in particular to an annular vacuum molding press which is characterized in that a sealing box body is provided with a heating station, a molding station and a cooling station; the heating station, the forming station and the cooling station are circumferentially distributed in the sealing box body; a material opening is formed in the bottom of the sealing box body between the heating station and the cooling station; a mold conveying assembly is arranged on the portion, under the material opening, of the rack. A rotary shifting assembly is arranged in the sealed box body; the mold conveying assembly is composed of a translation linear module, a lifting module and a material carrying table. The lifting module is connected to the translation linear module; the material carrying table is connected to the lifting module. When the annular vacuum molding press is used, in the structure, all stations of the annular vacuum molding press are circumferentially distributed, the total length of the molding press is shortened, the spatial layout of the molding press in a plant is easier, the feeding port and the discharging port are overlapped at the material ports, the stations are reduced, and the internal structure of the molding press is more compact.

The invention provides an antenna assembly and electronic equipment, and relates to the field of communication. The antenna assembly comprises a middle frame which comprises a substrate, a frame and rib positions, and the frame is connected with the edge of the substrate through the rib positions; the first antenna is arranged on the frame; the second antenna is arranged on the frame, and the rib position is located between the first antenna and the second antenna; and one end of the first feeder line is used for being electrically connected with the circuit board, and the other end of the first feeder line penetrates through the rib position and is electrically connected with the feeding point of the second antenna. The rib position is arranged between the first antenna and the second antenna, and the rib position can increase the distance between the first antenna and the second antenna, so that the isolation degree between the first antenna and the second antenna is increased. And the first feeder line is not arranged on the substrate of the middle frame, and the position of the first feeder line is closer to the frame, so that the space occupied by the first feeder line is reduced, the internal structure of the electronic equipment is more compact, and a screen with a larger display area can be conveniently arranged.

The utility model discloses electronic equipment, and belongs to the technical field of electronic equipment. The connecting base is arranged on the side, facing the screen module, of the first circuit board, so that the first flexible circuit assembly of the screen module can be directly connected with the connecting base and does not need to be wound to or penetrate through the other side of the first circuit board. Therefore, when a technician disassembles the screen module, the connection between the first flexible circuit assembly and the connecting seat can be directly separated from the screen side, and then the disassembly of the screen module is completed. Compared with the prior art that the rear cover needs to be disassembled when the screen module is disassembled, the electronic equipment has the advantages that the step of disassembling the rear cover is omitted, the complexity of the maintenance process is reduced, the maintenance time is shortened, the equipment damage risk caused by additionally disassembling the rear cover is effectively avoided, and the reliability of product maintenance is remarkably improved.

The application relates to a drive axle, a differential and a vehicle, the drive axle comprising: a driving part; and a differential arranged along a second axis; wherein the differential comprises: a driven part; an output end; a clutch part capable of moving along the direction of the second axis between a locking position and an unlocking position, when the clutch part is located at the locking position, the clutch part is connected with the driven part, the first rotation speed and the second rotation speed are equal; when the clutch part is located at the unlocking position, the clutch part is separated from the driven part. The drive axle and the vehicle of the application comprise the differential arranged along the direction of the second axis, the differential has a locking function, so that the drive axle can adjust whether to enable the differential function according to needs, the clutch part moves along the direction of the second axis, the overall structure reduces power loss caused by other directional components, improves transmission efficiency, reduces occupied space, and makes the internal structure of the differential more compact.

The utility model belongs to the technical field of milk tea machines, and discloses a milk tea machine material box and a milk tea machine. The milk tea machine material box is used for being inserted into a discharging bin of a milk tea machine body, a box body of the milk tea machine material box comprises a bottom plate and a side wall frame arranged in the circumferential direction of the bottom plate, the side wall frame is a step-shaped frame body provided with at least two layers of outer step faces at intervals in the inserting direction of the side wall frame, and the outer step faces are used for being in lap joint with the milk tea machine body. A discharging hole is formed in the position, close to the bottom plate, of the side wall frame, and an avoiding structure is formed at the position of the discharging hole at the lower end of the milk tea machine material box. The avoiding structure is arranged at the discharging hole, and the connector structure used for being connected with the discharging pipe can be contained at the avoiding structure, so that the connector structure does not need to occupy other space in the milk tea machine main body; according to the milk tea machine material box, the side wall frame is arranged to be of the multi-layer step-shaped frame body structure, the structural strength of the milk tea machine material box is improved, the milk tea machine material box can be suitable for discharging bins of different specifications, and the application range of the milk tea machine material box is widened.

This application belongs to the field of optical fiber manufacturing, specifically disclosing a sealing structure, sealing device, and sealing method for the end face of a hollow optical fiber. The sealing structure is disposed on the end face of the hollow optical fiber body and includes a connecting layer and a sealing layer arranged sequentially. The connecting layer is a silane coupling agent molecular layer, with one side surface of the connecting layer covalently bonded to the silanol groups of the end face via siloxane bonds, and the other side surface of the connecting layer having active functional groups. The sealing layer is an organic sealant layer, which also has active functional groups, and these active functional groups form chemical bonds with the active functional groups on the other side surface of the connecting layer. Through the structural design of this application, the sealant can penetrate to a certain depth inside the hollow optical fiber body under pressure and form a flat sealing layer on the end face to be sealed, effectively improving the compactness and adhesion strength of the sealing layer on the end face of the hollow optical fiber body, thereby improving the sealing quality.

The invention belongs to the technical field of accelerators, and particularly relates to a low-corrosivity nontoxic sulfur-free alkali-free accelerator and a preparation method thereof. The low-corrosivity non-toxic sulfur-free alkali-free accelerator comprises the following raw materials in parts by weight: 20-30 parts of nano aluminum sol; 15 to 20 parts of silica sol; 8 to 10 parts of bentonite organic copolymer; 10 to 15 parts of aluminum salt; 6-10 parts of a composite early strength agent; 10 to 15 parts of water; the alkali-free accelerator provided by the invention does not contain sulfate radicals, is non-toxic and low in corrosivity, and ensures the safety of storage and use; by adding the bentonite organic copolymer, the stability of the alkali-free accelerator is improved; when the concrete admixture is applied to concrete, the setting time can be effectively shortened, and the early strength and durability of concrete are improved.

The present application relates to the technical field of carbon black production, in particular to a kind of carbon black and its production process.The present application solves the problems of large viscosity of ethylene tar, incomplete cracking, poor dispersibility and surface inertness of carbon black.First, the raw oil is treated by decalin / NMP complex solvent and ultrasonic wave, then a ferrocene / potassium borate composite catalyst is added, and the double-stage atomization technology is combined with gradient temperature field for combustion cracking;In the reaction quenching section, the modified quenching liquid containing KH-550 and urea is sprayed in the specific temperature zone for in-situ grafting, and finally the finished product is obtained by alternating speed granulation and microwave fluidized drying;The prepared carbon black has the characteristics of high structure, high yield, low impurity and high surface activity, and has high application value in the field of rubber reinforcement and high-performance composite materials.

The invention relates to the technical field of metal preparation, and particularly discloses a preparation process of a GL80 silicon-aluminum alloy. When the silicon-aluminum alloy is prepared, a melting casting technology is adopted, after silicon-aluminum alloy raw materials and silicon powder are remelted for multiple times in the nitrogen atmosphere, a composite modifier is added for modification treatment, refining and impurity removal are conducted after stirring, and finally casting forming is conducted. Wherein the composite alterant is prepared by mixing rare earth salt, sodium fluosilicate, sodium phosphate and aluminum powder, the rare earth salt, the sodium fluosilicate and the sodium phosphate have a synergistic effect, and the advantages of sodium, phosphorus and rare earth elements are combined, so that the refining effect of crystalline silicon is optimal, the internal structure of the alloy is more uniform and compact, and the stability of the material is improved; the comprehensive mechanical property of the alloy material is favorably improved.

The present invention relates to the technical field of power supply boxes, and specifically to a hollow vertical quick-access power supply box, which comprises a shell, a quick-insertion mechanism, a circuit breaker mechanism and a vertical hollow connector; heat dissipation holes are provided on the bottom plate of the shell and the side plates of the top cover; the quick-insertion mechanism is provided on the front panel and the rear panel of the shell; the circuit breaker mechanism is provided on the left panel and the right panel of the shell; the vertical hollow connector is built into the shell; the vertical hollow connector comprises a plurality of insulators, a plurality of main busbars arranged vertically and in parallel, and a plurality of second copper bar groups; adjacent main busbars are connected by insulators and connected to the shell by insulators; one end of the second copper bar group is correspondingly connected to the plurality of main busbars, and the other end is connected to the circuit breaker mechanism; a plurality of second copper bar groups are provided on both end surfaces of the main busbar; the quick-insertion mechanism is connected to the second copper bar group; the projections of the plurality of second copper bars of the second copper bar group on the top surface of the bottom plate overlap, and a ventilation duct is formed between adjacent second copper bar groups.

The application discloses a light and efficient through-shaft type wheel hub motor, which comprises a through-shaft, a wheel hub shell mounted on the through-shaft, a machine core, a planetary reduction mechanism and a clutch which are sequentially assembled along the through-shaft, the clutch comprises an outer ring and an inner ring, the inner ring is fixed on the through-shaft, the planetary reduction mechanism comprises a sun gear arranged on an output end of the machine core and a plurality of planetary gears, the planetary gears are arranged on planetary shafts, the planetary shafts are fixed to the outer ring of the clutch, the sun gear is in transmission connection with a ring gear fixed to the inner side of the wheel hub shell through the planetary gears, and the planetary gears are double planetary gears, the double planetary gears comprise coaxially arranged large and small gears, the large gear is a plastic gear and is in mesh with the sun gear, the small gear is a metal gear and is in mesh with the ring gear, and an extension shaft sleeve is integrally arranged at the center of the small gear to fix the large gear. The through-shaft type wheel hub motor can ensure high output power and good internal structural strength under the premise of reducing weight, and the volume is further reduced.

The utility model is suitable for the technical field of medical equipment, and provides a monitor which comprises a shell, a circuit board and a blood pressure detection device. The circuit board is arranged in the shell and is provided with a first mounting groove; the blood pressure detection device is electrically connected to the circuit board and is at least partially arranged in the first mounting groove. A part of the blood pressure detection device is exposed out of the shell so as to detect blood pressure. On the basis, a part of structure of the blood pressure detection device is integrated on the circuit board by being mounted in the first mounting groove, so that the internal structure of the monitor is more compact, the mounting space occupied by the blood pressure detection device is reduced, the size of the monitor is further reduced, and the carrying convenience of the monitor is improved.

The utility model discloses a handheld steam brush with a compact structure, which comprises a shell, a steam outlet component is arranged in the shell, and the bottom of the shell is connected with a water tank for supplying water to the steam outlet component; the steam outlet assembly comprises a mounting support, a steam generating unit arranged in the mounting support and a steam outlet nozzle covering the output end of the shell, a steam spraying hole used for spraying steam and an adsorption hole used for adsorbing clothes are formed in the steam outlet nozzle, and an exhaust hole communicated with the adsorption hole is formed in the shell. A suction channel communicated with the adsorption holes and the exhaust holes is formed in the bottom of the mounting bracket, and a heat insulation plate covers the steam generation unit.

The utility model belongs to the technical field of personal care equipment, and particularly provides a shaver. The utility model aims to solve the problem that the installation position of the indicating lamp in the existing shaver is limited. Therefore, the shaver comprises a shaver body and a shaver head, and the shaver body comprises a machine shell, an indicating lamp arranged in the machine shell and a light reflecting component. At least one part of the machine shell is light-transmitting. The light reflecting component is arranged in the machine shell and used for reflecting light emitted by the indicating lamp to the light transmitting part of the machine shell. According to the utility model, the light reflecting component is arranged in the casing to reflect the light emitted by the indicating lamp to the light transmitting part of the casing, so that the position of the indicating lamp can not be tightly attached to the casing any more, more mounting positions can be provided, and the technical problem is solved.

The invention belongs to the field of roads, and particularly relates to a road epoxy asphalt toughening additive and a preparation method thereof.The preparation method comprises the steps that calcium carbonate whiskers are prepared from calcium 2-methoxyethanol and ammonium bicarbonate and subjected to hydrophobic modification, and modified calcium carbonate is obtained; the preparation method comprises the following steps: carrying out surface coating on calcium sulfate, then mixing the coated calcium sulfate with modified calcium carbonate, putting the mixture into an ethanol dispersion liquid of ammonium carbonate, and fully dispersing to obtain the road epoxy asphalt toughening additive. The road epoxy asphalt toughening additive disclosed by the invention can be used for directionally filling pores of a road system and bridging and repairing cracks in a subsequent road use process, so that an internal structure is more compact, continuous toughening is realized, the durability of a road is improved, and the service life of the road is prolonged.

The invention relates to an electric tool which is provided with a motor shaft extending in the first direction, an air cylinder extending in the direction perpendicular to the first direction, a first gear meshed with the motor shaft, a second gear coaxial with the first gear and in linkage with the first gear, and a third gear arranged on the air cylinder in a sleeving mode and meshed with the second gear to drive the air cylinder to rotate. A concave first cavity is formed in the end, facing an air cylinder, of a first gear, a third gear extends into the first cavity from the outer surface of the air cylinder, a motor shaft and the first gear have the meshing length L extending in the first direction, and a second gear and the third gear have the meshing length X extending in the first direction; the projection of the meshing length L and the projection of the meshing length X in the first direction are at least partially overlapped, so that the sizes of the two sets of gears meshed in different directions in the first direction are reduced, the internal structure of the electric tool is compact, the overall size of the electric tool is reduced, and miniaturization of the electric tool is achieved.