28results about How to "Small opening" patented technology

The utility model discloses a drilling blowout preventer for coal mine water exploration and drainage, and relates to the technical field of coal mine water exploration and drainage. The device comprises a shell, a blowout prevention assembly is arranged at the bottom of the shell, a lifting seat is arranged in the shell, a motor is fixedly connected to the top of the lifting seat, the blowout prevention assembly comprises a protective cover, a sliding hole is formed in the center axis of the top of the protective cover, and a rotating rod is connected to the inner wall of the sliding hole in a sliding mode. The blowout prevention assembly is arranged, specifically, sprayed water flow can make contact with the first buffering ring and the second buffering ring, the two-time buffering effect is achieved, at the moment, the water flow flows in an S-shaped mode, along with continuous rising of the water flow, the water flow flows to the position above the intercepting ring through the intercepting ring, and at the moment, the impact force of the water flow is greatly weakened; and the water flow on the intercepting ring flows out through the water outlet, so that the spraying condition is avoided, and the damage to surrounding equipment and workers caused by the impact of the water flow is avoided.

An aircraft fuel tank inerting system comprises: an inerting gas separation device (100), the inerting gas separation device (100) comprising a to-be-separated gas inlet (110) and an inerting gas outlet (120); the aircraft fuel tank inerting system comprises an inerting gas separation device (100), an inerting gas outlet (120) and an inerting gas conveying pipeline (200), the inerting gas conveying pipeline (200) is in fluid connection with the inerting gas outlet (120) and used for introducing the inerting gas produced by the inerting gas separation device (100) into an aircraft fuel tank (300), and the aircraft fuel tank inerting system further comprises an injection device and a control device, and the injection device is configured to inject the cabin bleed air (420) by taking the engine bleed air (410) as an active flow and then convey the obtained air to the to-be-separated air inlet (110). According to the aircraft fuel tank inerting system, two strands of gas are introduced from the passenger cabin and the engine, and the jet pump is arranged on the upstream of the system, so that the temperature / pressure adjustment of engine bleed gas and passenger cabin bleed gas is realized at lower cost.

The invention provides a hydraulic system and engineering machinery. The hydraulic system comprises a hydraulic pump, a proportional directional valve, a compensation valve and a first overflow valve. An oil outlet of the compensation valve is communicated with an oil inlet of the proportional reversing valve, and an oil inlet of the compensation valve is communicated with an oil outlet of the hydraulic pump; an oil inlet of the first overflow valve can selectively communicate with a first oil port of the proportional reversing valve or a second oil port of the proportional reversing valve, a first cavity of the compensation valve and the oil inlet of the first overflow valve are connected with the same oil port of the proportional reversing valve, and an oil inlet of the proportional reversing valve can communicate with a second cavity of the compensation valve. The first chamber and the second chamber are located on a rearward side of the compensation valve. As the compensation valve can control the front and back pressure difference of the proportional reversing valve to be basically constant, the output flow is not influenced by the load. The overflow valve limits the maximum pressure of an oil way, and the minimum overflow energy consumption is achieved.

The utility model relates to the technical field of pulp processing, and discloses a filtering device for grapefruit pulp processing, which comprises a feed inlet, the bottom of the feed inlet is communicated with a second hollow shell, the right side of the outer wall of the second hollow shell is fixedly connected with a waterproof shell, and the inner wall of the waterproof shell is fixedly connected with a motor. A rotating rod is fixedly connected to the output end of the motor, oval blocks are fixedly connected to the left side and the right side of the outer wall of the rotating rod, a filter screen is slidably connected to the middle of the inner wall of the second hollow shell, a filter plate is fixedly connected to the bottom of the inner wall of the second hollow shell, and a plurality of filter holes are formed in the top of the filter plate. The bottom of the second hollow shell communicates with a discharging opening. The motor is started to enable the rotating rod and the oval block to rotate, the filter screen vibrates, large-particle matter is filtered to the top, raw materials are further filtered through the filter holes and finally fall into the first hollow shell through the discharging opening, vibration filtering is achieved, and pulp is prevented from blocking the filter screen.

The utility model discloses a kind of tea coarse fiber detection devices, it is related to tea coarse fiber detection technical field, including digestion container, funnel one and condenser tube are equipped on digestion container top, water inlet pipe, pipeline and liquid outlet pipe are equipped on the sidewall of digestion container, waste liquid port for discharging digestion container waste liquid is equipped on the pipeline, filter for filtering pipeline discharge waste liquid is equipped on the pipeline between waste liquid port and digestion container, the liquid outlet pipe is connected filtering mechanism. Without disassembling reaction device, waste liquid can be discharged from bottom, replace new digestion solution into reaction device, without transferring digestion residue to other container to clean, convenient operation, reduce fiber residue loss, without back and forth transfer fiber residue, reduce the operation difficulty when tea coarse fiber detection, avoid the loss of digestion fiber residue in repeated transfer process, reduce detection error, so that it is convenient to disassemble cylinder cover and filter cartridge, improve work efficiency.

The utility model provides a duct type air conditioner, a duct type air conditioner mounting structure and an air conditioner. The duct type air conditioner comprises a shell, an air inlet, an air outlet and an air duct communicating with the air inlet and the air outlet. The heat exchanger is arranged in the air duct; the cross-flow fan is arranged in the air duct; the wind pipe machine is installed in the suspended ceiling, the length and the height of the wind pipe machine are set to be smaller than the length and the height of a ventilation opening formed in the suspended ceiling so that the wind pipe machine can be disassembled and assembled through the ventilation opening, and the air return opening and the air outlet can communicate with the ventilation opening. The air pipe machine adopts the cross-flow fan, so that the ultra-thin design of the air pipe machine is favorably realized, and the air pipe machine can be disassembled and assembled through a ventilation opening of a suspended ceiling, so that the air pipe machine is convenient to maintain and replace; and the integrated design of a suspended ceiling air inlet communicated with an air return opening of the ducted air conditioner, a suspended ceiling air outlet communicated with an air outlet of the ducted air conditioner and an access hole used for disassembling, assembling and maintaining the ducted air conditioner is realized on the suspended ceiling.

The utility model belongs to the technical field of glass kilns, and particularly relates to a glass kiln feeding assembly which comprises a furnace body, and the right side wall of the furnace body is connected with a feeding pipe in a sliding mode. A motor is started to drive a spiral feeding rod to rotate, materials are conveyed into a material distribution shell, the materials fall into a gap between every two adjacent baffles in the material distribution shell, a feeding pipe is pushed leftwards, the material distribution shell moves leftwards in a furnace body, and at the moment, a first gear and a second gear drive a bidirectional spiral rod and a transmission shaft to rotate under the condition that racks are meshed with each other; the bidirectional screw rods spread materials accumulated at one position towards the two sides, the materials can conveniently and evenly fall into a gap between every two adjacent baffles, the transmission shafts drive the baffles to rotate, the baffles drive the materials to fall off from the discharging port, and due to the fact that the material distributing shell is in a moving state, the materials can be evenly scattered in the furnace body in a reciprocating mode, manual control over feeding is not needed, and the material distributing efficiency is improved. The feeding uniformity is improved, time and labor are saved, the opening of the furnace body is small, large heat loss is not prone to occurring, and the heat preservation performance is good.

The utility model relates to the technical field of agricultural instruments, in particular to a fruit and vegetable seed sowing machine which comprises a machine body and a feeding port, the upper surface of the machine body is communicated with the lower surface of the feeding port, inclined plates are fixedly connected to the two sides of the inner wall of the machine body, and first water pipes are fixedly connected to the two sides of the inner wall of the machine body; the inner wall of the machine body is slidably connected with the surface of the seedling raising tray, a seed scattering and screening structure is arranged on the surface of the machine body, and a fruit and vegetable seed feeding control structure is arranged on the upper surface of the machine body. According to the device, the thin rod is driven to swing up and down in the first shell in the thick rod, and the seed separating hole plate, the seed scattering hole plate and the seeding hole plate are driven to move up and down to generate vibration and carry out seed scattering work through the sliding grooves formed in the protruding cylinders and the square blocks on the thick rod, so that blockage of fruit and vegetable seeds during seed scattering is prevented, and the subsequent seed scattering work cannot be influenced.

The utility model relates to the technical field of lamp installation, and discloses a lamp groove accessory installation structure for a self-provided lamp strip, which comprises a wall top, a wall surface and a second connecting piece, a vertical wall plate is arranged on the outer side of the wall surface, a lamp groove connecting piece is arranged on the outer side of the vertical wall plate, a first clamping block is fixedly installed on one side of the lamp groove connecting piece, and a second clamping block is fixedly installed on the other side of the lamp groove connecting piece. A connecting block is fixedly installed on one side of the lamp groove connecting piece, a second clamping block is fixedly installed on one side of the lamp groove connecting piece, a first transverse wall plate is fixedly installed at the bottom of the lamp groove connecting piece through bolts, a connecting plate is arranged at the top of the second clamping block, and a vertical plate is fixedly installed at the top of the first transverse wall plate. According to the lamp trough accessory mounting structure for the self-provided lamp strip, through the design of the lamp trough connecting pieces, a plurality of lamp trough connecting pieces can be conveniently mounted, the overall opening can be small through the arc-shaped structure, the display effect can be improved, the attractiveness of the overall accessory can be improved, and construction can be facilitated through clamping fit between the lamp trough connecting pieces and the lamp trough connecting pieces.

The utility model relates to the field of selenium product production equipment, in particular to freeze-drying equipment for selenium-containing protein powder production, which comprises a shell, a freeze-drying cabin arranged in the shell, a large cabin door arranged on the side surface of the freeze-drying cabin, a discharge cabin arranged below the freeze-drying cabin, and a small cabin door arranged on the side surface of the discharge cabin. A sliding door assembly is arranged between the discharging bin and the freeze-drying bin, a rotating shaft is horizontally arranged in the freeze-drying bin, a plurality of supporting arms are arranged on the side face of the rotating shaft, connecting mechanisms are rotationally arranged at the ends of the supporting arms, and the connecting mechanisms are connected with storage boxes. The utility model has the advantages of reducing the temperature rise in the freeze-drying equipment and saving energy.

The utility model discloses a sewage valve and water heater belongs to water heater technical field, and sewage valve includes valve body and valve core subassembly, and the inside of valve body is provided with valve cavity and water passageway, and is provided with water passageway between valve cavity and water passageway, and the sewage outlet that is communicated with valve cavity and the water inlet and the water outlet that are communicated with water passageway are seted up on valve body, valve core subassembly includes valve core body and valve rod, and valve core body sets up in valve cavity, and valve rod is connected with valve core body, and valve rod can rotate around self axis to drive valve core body and moves along the straight line, and valve core body is used for opening or closing water passageway. Water heater includes above -mentioned sewage valve. Through the integration of water inlet in valve body, improve the integration, can realize water inlet, also can realize sewage, and the axial displacement of valve rod does not exist, is convenient for the sealing of valve rod, avoids the water leakage problem, and reduces the space occupation, guarantees compactness, is applicable to the installation of narrow space.

The invention discloses a deoxidized aluminum rod production system and production process based on leftover waste, and relates to the technical field of aluminum rod machining, the deoxidized aluminum rod production system based on the leftover waste comprises a material crushing unit, a batching unit, a briquetting unit, a preheating unit, an extrusion unit and a rewinding unit, the crushing equipment comprises a mounting frame, a feeding hopper is arranged at the top of the mounting frame, a guide hopper is arranged on the inner side of the feeding hopper, a crushing assembly is arranged at the top of the mounting frame, a material homogenizing assembly and an adjusting assembly are arranged at the bottom of the guide hopper, and an auxiliary assembly is arranged in the crushing assembly. According to the utility model, the crushing teeth are arranged to prevent uneven abrasion of the crushing part, leftover materials are quickly crushed by changing the shape of the leftover materials in the feeding process, the phenomena of material blockage and slipping are prevented, in addition, chippings clamped among the crushing teeth can be removed in the crushing process, and the crushing effect is prevented from being influenced.

The invention discloses an adjusting assembly of a quick-opening high-temperature spherical sealing cut-off valve, and relates to the technical field of cut-off valves, the assembly comprises a valve body, and the valve body comprises a fixed seat and a rotating seat; the valve clack mechanism comprises a fixed valve clack and a rotating valve clack, the fixed valve clack is arranged in the fixed seat, and the rotating valve clack is arranged in the rotating seat; the adjusting mechanism can adjust the friction force between the rotating valve clack and the fixed valve clack when the rotating valve clack rotates and enables the friction force to recover to the initial size by means of a medium introduced into the stop valve after the rotating valve clack stops rotating. Through the arrangement of the annular groove, the adjusting mechanism and other devices, part of flowing media can move towards the direction of the other communication groove through the annular groove and flow towards the direction of the fixing base from the other communication groove, and therefore the problem that due to the fact that openings of the communication grooves become small, the pressure of the flowing media is instantly increased, and the stop valve is damaged is solved.

A drive unit includes a subframe, a power receiving device, a power storage device, a power control device, and a rotating electrical machine. The sub-frame is fixed to the lower portion of the vehicle body. And the power receiving device is arranged below the auxiliary frame and is fixed with the auxiliary frame into a whole. The power receiving device receives AC power transmitted in a non-contact manner from the power transmitting device. The rotating motor and the auxiliary frame are fixed into a whole. The power storage device and the power control device are integrally fixed to the rotating electric machine. The power storage device and the rotating electric machine transmit and receive power. The power control device controls power transmission and reception between the power storage device and the rotating electric machine.

This utility model discloses an inductor mounting device, including a workbench. A rotating module and a disc mounted on the rotating module are arranged in the center of the workbench. The workbench also includes a housing feeding device, a shaping device, an inductor feeding device, two rotating mounting devices, a good product inspection device, a unloading device, and a housing material inspection device, arranged sequentially along the outer circumference of the disc. Eight positioning fixtures are mounted on the disc. This utility model achieves fully automated intelligent mounting, saving manpower and significantly improving production efficiency. Furthermore, the oblique mounting method prevents the opening of the metal housing from being too small, making it difficult for the inductor to be embedded, and also reduces the risk of damaging or deforming the metal housing.

The utility model discloses an adjustable coaxial blowing device for laser welding, which comprises a coaxial blowing base, a connecting ring arranged on the periphery of the coaxial blowing base, a coaxial blowing cylinder arranged on one side of the connecting ring, a height adjusting ring arranged on one side of the coaxial blowing cylinder, a copper nozzle connecting block arranged on one side of the height adjusting ring, and a coaxial blowing nozzle arranged on one side of the copper nozzle connecting block. A first O-shaped sealing ring is embedded in the upper surface of the coaxial blowing base, one side of the coaxial blowing base is connected with an L-shaped threaded quick plug, and an upper suction block is embedded in the lower surface of the coaxial blowing base. The problems that paraxial blowing protection is poor in protection effect on a welding seam with large splashing and the consumption of a protection lens is large are solved, and the device is simple in structure, easy to machine and convenient to operate and use.

The invention relates to the technical field of pilot operated safety valves, in particular to a pilot operated safety valve action performance test system and a device thereof.The pilot operated safety valve action performance test system comprises a main valve and a pilot valve, an inlet cavity of the main valve is connected with an external steam source, and the inlet cavity of the main valve is connected with a pilot valve lower cavity of the pilot valve; the air chamber cavity of the main valve is connected with the pilot valve upper cavity of the pilot valve, the flow reducer is arranged at the end of the outlet cavity of the main valve, the flow reducer is used for limiting discharge of the outlet cavity of the main valve, the exhaust efficiency can be reduced, the fault phenomena such as frequency hopping or fluttering are avoided, and meanwhile due to the fact that after flow limiting, the flow reducer can be used for reducing the discharge pressure of the main valve. The exhaust efficiency is reduced, the requirement for the air pressure of an external steam source is reduced, the pressure stability in the test process is improved, and it is guaranteed that the device can normally act in the test process.

The invention discloses a honey storage and transfer device, and relates to the technical field of loading and unloading, the honey storage and transfer device comprises a bottom layer frame and an upper layer frame, a support frame is fixedly arranged on the bottom layer frame, honey is stored in a storage barrel, and the storage barrel is placed on the bottom layer frame and the upper layer frame. When honey in the storage barrel needs to be put into other barrels, a part of honey in the storage barrel can be extracted firstly, then honey which is adhered to the side wall and is not easy to discharge is left, and then the honey is discharged by using the structure on the support frame. A storage barrel is hinged to a supporting frame, specifically, a blocking ring is fixedly installed on the outer side of the storage barrel and located at the position close to the upper side, it is guaranteed that centrifugal force is downward when the whole storage barrel swings, honey is viscous and slowly flows downwards in the storage barrel, and the honey is discharged downwards through overall swinging of the storage barrel. And through centrifugal force, the honey flows from the storage barrel to the transfer barrel more quickly, and the transfer efficiency is greatly improved.

A storage and transportation device for picking in an orchard belongs to the technical field of agricultural mechanical equipment and comprises a frame, a bottom plate is fixedly connected to the inner side of the frame, universal wheels are fixedly connected to chamfers of the bottom of the frame, three sets of container racks are fixedly connected to the top of the frame, each container rack comprises four stand columns, and sliding rods are fixedly connected to the tops of the stand columns. Sliding sleeves are fixedly connected to the outer sides of the sliding rods, cross beams are fixedly connected to the rear sides of the two sliding sleeves on the front side and between the two sliding sleeves on the rear side, two sliding frames are slidably connected to the outer sides of the cross beams, and an ascending frame is fixedly connected between the two sliding frames on the left side and the two sliding frames on the right side. People can directly stoop down to place fruits at the bottom of the canvas bag when the fruits are few, so that the fruits are prevented from falling from high altitude and being collided; meanwhile, the problem that the fruits fall off due to bumping during transportation is solved through the clamp with the adjustable opening size and the stable structure.

The invention discloses a baking equipment heating and cooling integrated device which is arranged on a baking box and comprises a heating assembly and a cooling assembly. The heating assembly comprises a heater and a heating pipeline, one end of the heating pipeline is connected with the heater, and the other end of the heating pipeline extends into the baking box; the cooling assembly comprises a cooling pipeline and a cooling valve, the cooling pipeline is connected with the heating pipeline, and the cooling valve is arranged on the cooling pipeline. The device has the beneficial effects that the heating assembly and the cooling assembly are integrally arranged, the occupied space and the device opening are reduced, the working efficiency of the device is improved, and the device cooling time is shortened.

The invention discloses a linkage combination valve, and belongs to the technical field of combination valves.The linkage combination valve comprises a valve body base, control valve body mechanisms are fixedly connected to the two sides of the top of the valve body base correspondingly, and threaded backing rings are spirally connected to the interiors of the two control valve body mechanisms correspondingly; the centers of the tops of the two control valve body mechanisms are both slidably connected with driving rod mechanisms, the tops of the two control valve body mechanisms are both provided with pressure reduction adjusting mechanisms, and the bottom of one control valve body mechanism is fixedly connected with a detachable bottom cover. A support adjusting mechanism is arranged between the valve body base and the two control valve body mechanisms. The support adjusting mechanism and the communicating assembly are designed, when leakage occurs at the position of the output pipeline, the air pressure of the tail end of the valve is reduced, the tail end driving rod mechanism ascends, the valve opening is reduced, meanwhile, the support adjusting mechanism drives the driving rod mechanism at the head end to descend, and the situation of excessive gas leakage is avoided.

The novel centrifugal aluminum casting sprue bush comprises a sprue bush body and a sand box feeding pipe, and the sprue bush body is composed of a sprue bush shell, an assembly type inner wall body, a filtering adjusting assembly and an upper pressing fixing ring; the assembly type inner wall body is arranged in the sprue bush shell, the filtering adjusting assembly is arranged at the upper end of the sprue bush shell, the upper pressing fixing ring is arranged at the upper end of the filtering adjusting assembly, and the sprue bush body is arranged at the upper end of a sand box feeding pipe. The vacuum cavity is formed in the sprue bush shell, the sprue bush body needs to be preheated before being used, and the vacuum cavity is arranged to effectively prevent heat from being quickly dissipated after preheating, so that moisture is efficiently removed, the service life is prolonged, and the influence of thermal shock and chilling on a die casting is avoided; and the assembly type sprue bush can adapt to production of castings made of different materials, and compared with an integral type, the assembly type sprue bush is easier to maintain and replace, so that the maintenance cost is reduced, and the production efficiency is improved.

The present invention relates to the field of cutting fluid treatment, and in particular to a circular cutting fluid treatment machine, wherein the filter chamber comprises an overflow chamber, a slow flow chamber and a cut-off chamber, the air pump is connected to the top of the overflow chamber, a partition is vertically arranged in the upper housing, a first through hole and a second through hole are arranged on the partition, the first through hole connects the overflow chamber and the slow flow chamber, and the second through hole connects the slow flow chamber and the cut-off chamber; the cut-off chamber comprises a separated left cavity and a right cavity, the top of the left cavity is flush with and connected to the top of the slow flow chamber, the top of the right cavity is higher than the top of the left cavity, a first drainage pipe is protruding from the top of the left cavity, and a second drainage pipe is arranged in the right cavity. The purpose of the present invention is to provide a circular cutting fluid treatment machine, which has the advantages of high integration and small size. The present invention has the following beneficial effects: the overall structure is compact, the size is small, and it is convenient to transport and install; the top opening of the filter chamber is small, which is convenient to cover and close, and has good deodorization and anti-fouling effects.

The invention discloses a production device and a production process of moisture-absorbing and quick-drying polyester knitted fabric, and relates to the field of production devices of knitted fabric. A production device for moisture-absorbing and quick-drying polyester knitted fabric comprises a rack and a top plate, the top plate is fixed to the rack, and the production device further comprises a plurality of steam rollers rotationally arranged on the rack, and the steam rollers are symmetrically arranged in an upper group and a lower group respectively; a skewed slot is formed in the rack, and the group of steam rollers positioned at the upper part slide on the skewed slot through a limiting shaft; a servo motor is fixed to the top plate, and a threaded rod is fixed to the output end of the servo motor. The threaded rod is connected with a supporting column and a cover plate through threads, and the cover plate is fixed to the supporting column. Limiting rods are fixedly connected to the lower portions of the supporting columns, and the limiting shafts slide in the limiting rods. According to the device, the travel distance and the shaping time of the polyester fabric can be increased in a limited space, the time required by high-temperature shaping is shortened, and the cooling efficiency of the polyester fabric is improved.

The invention relates to a welding method of a carbon fiber composite material and metal, which comprises the following steps: (1) a hole is processed on a to-be-connected wall surface of a metal piece, the interior of the hole is large, the opening of the hole is small, burrs are formed on the periphery of the hole on the to-be-connected wall surface of the metal piece, and the free end of each burr extends towards the direction far away from the hole to form a hook part; (2) a connecting piece is prepared, specifically, thermoplastic resin is molten and impregnated on the carbon fiber structure until the carbon fiber structure is partially exposed to form a connecting part connected with the hole, the connecting part comprises an inserting part and a hooking part, the inserting part is inserted into the hole, and the hooking part is connected with the hooking part; (3) welding the connecting piece and the metal piece; and (4) welding the connecting piece and the carbon fiber composite material. The connection strength is high.

The anti-scouring anhydrous stemming is prepared from the following raw materials in percentage: 45% of white corundum, 5% of silicon carbide, 6% of anhydrous aluminum oxide, 25% of a carbon raw material, 15% of soft clay, 10% of an additive, 10%-15% of a binding agent, 3% of an additive and expanding agent and 2% of a plasticizer. The invention has the advantages of good plasticity, high wear resistance and corrosion resistance, good sintering performance and high adhesion strength.

The utility model belongs to the technical field of dehydration treatment, and particularly relates to a dehydration tank which comprises a machine body, a dehydration mechanism mounting groove and a driving mechanism mounting groove, a cover body capable of being opened and closed is arranged at the top of the dehydration mechanism mounting groove, a feeding opening is formed in the cover body, and the size of the feeding opening is smaller than that of a dehydration mechanism; the driving mechanism is mounted in the driving mechanism mounting groove and used for driving the dewatering mechanism to rotate; and the dewatering mechanism is rotationally installed in the dewatering mechanism installation groove and used for conducting centrifugal dewatering on the internal materials, and the dewatering mechanism installation groove is provided with a water outlet.

The present invention discloses an adjustable cylinder shock absorption system, which comprises an air storage tank, a pressure regulating switch and an air cylinder. The air cylinder is arranged on a shock-receiving part of a motorcycle, and a piston rod of the air cylinder is connected to a bearing part of the motorcycle. The air outlet of the air storage tank is connected to the air cylinder through a first air pipe, and the air inlet of the air storage tank is connected to an air pump through a second air pipe, and the air pump is arranged on a motorcycle body. The air cylinder is provided with a first sensor for detecting the load-bearing weight, and the first sensor is electrically connected to the pressure regulating switch, and the pressure regulating switch is arranged on the first air pipe. The present invention can adjust the pressure of the air cylinder according to the weight of the vehicle and the weight of the passengers and cargo, so as to obtain a better shock absorption effect and improve the riding comfort of the passengers.