139 results about "Low transmission" patented technology

The invention belongs to the technical field of lifting operation platforms, and particularly relates to a pushing chain type lifting operation platform which comprises a pushing chain lifting mast, the pushing chain lifting mast comprises a telescopic mast and a pushing chain driving system, and an operation platform is installed at the top end of the telescopic mast. According to the pushing chain type lifting operation platform, a variable frequency motor drives a pushing chain to conduct high-speed and constant lifting motion, a mast is vertically pushed and driven to ascend and descend, so that the operation platform on the top of the mast is driven to ascend and descend, the operation platform can stop at any height without sliding down, pure mechanical driving is adopted, and the risk of hydraulic oil leakage is avoided; and meanwhile, the problems that the transmission efficiency is low, the lifting speed is low, the speed is not constant, the descending speed is difficult to control, the stopping precision is low, and oil leakage possibly pollutes the environment are solved.

The utility model discloses a lower transmission gear structure and an injection mold thereof, and relates to the technical field of roller shutter door transmission gears, the lower transmission gear structure comprises a plurality of transmission gears, each transmission gear comprises a gear disc, the outer surface of each gear disc is provided with a plurality of teeth, the teeth are sequentially and annularly arranged, two sides of each gear disc are respectively and fixedly provided with an anti-falling plate, and each anti-falling plate is provided with an anti-falling groove; a plurality of annularly-arranged penetrating grooves are formed in the two anti-disengaging plates, and a plurality of impurity discharging and drainage grooves are formed in the outer surface of the gear disc. The anti-falling plates are arranged on the two sides of the transmission gear (namely the two sides of the chain meshing position), the position of the chain on the transmission gear is limited, the risk that the chain is separated from the transmission gear is reduced, the stability of meshing of the chain and teeth is improved, and the service life of the chain is prolonged. The friction force between the chain and the anti-falling plate can be obviously reduced through the anti-damage balls arranged on the anti-falling plate, the energy loss is reduced, the transmission efficiency is improved, the abrasion of the chain and the anti-falling plate is reduced, and the service life of the chain is prolonged.

A side throwing type fertilizer distributor belongs to the technical field of fertilizer distributors and comprises a vehicle body, a throwing assembly, wheels, an upper spiral shaft, a lower spiral shaft, a rear flange, a swing frame, a gate, a connecting rod, a push-pull plate, an oil cylinder, a material throwing wheel, a lower large chain wheel, a lower small chain wheel, a driving wheel, an input shaft, an upper chain wheel, an upper large transmission wheel, an upper small transmission wheel, a lower large transmission wheel, a lower small transmission wheel, an upper transmission shaft and a lower transmission shaft. The wheels are connected to the swing frame, the swing frame is hinged to the lower end of the vehicle body, the gate is arranged in the rail groove, the connecting rod is hinged to the gate and the push-and-pull plate, the push-and-pull plate is hinged to the vehicle body, the oil cylinder is hinged to the push-and-pull plate and the vehicle body, the scattering assembly is arranged at the discharging port, and the upper spiral shaft and the lower spiral shaft are connected into the vehicle body through a bearing and a rear flange. The input shaft is arranged on the front lower portion of a transmission box of the vehicle body, and all rotating components are in transmission in the transmission box through chain wheels and chains. The vehicle body is good in sealing performance and high in transmission efficiency, and fertilizer can be thrown to the side of the vehicle body.

A method, device, equipment and readable storage medium for controlling an engine torque reduction function, the method comprising: obtaining the gear position of a vehicle's transmission; determining a target torque change rate limit of the engine according to the transmission gear position or the transmission speed ratio corresponding to the transmission gear position; and performing engine torque reduction according to the target torque change rate limit. Engine torque reduction can be performed with different target torque change rate limits in different gear positions, and furthermore, engine torque reduction can be performed with a lower target torque change rate limit in gear positions with a higher transmission speed ratio, thereby avoiding excessive torque change rate at the transmission system that causes vehicle oscillation. Meanwhile, engine torque reduction can be performed with a higher target torque change rate limit in gear positions with a lower transmission speed ratio, thereby achieving the fastest possible increase in engine torque while maintaining vehicle smoothness, ultimately achieving an effective balance between the vehicle's torque response capability and the smoothness of the torque increase process.

This utility model relates to the field of rotary joints, specifically to a rotary joint that can be used as a drive end. It includes a rotating central shaft, comprising an upper transmission part and a lower transmission part connected to a rotating mechanism. The rotating central shaft also includes an inlet and an outlet that are interconnected. A bearing is also included. A housing includes a mounting groove for mounting the rotating central shaft and a feed pipe for supplying material to the inlet, allowing the material to be discharged from the outlet. A connecting flange is located at the end of the lower transmission part away from the upper transmission part, and the connecting flange is adapted to connect to a stirring mechanism. The rotating central shaft passes through the housing. The side of the rotating central shaft is rotatably connected to the housing via the bearing. This utility model provides a rotary joint that can be used as a drive end, combining the rotary joint and the drive part of the stirring mechanism into one, reducing device costs. Because the rotary joint rotates while simultaneously conveying material, it improves the thoroughness of material mixing after stirring.

The invention relates to the technical field of aero-engine starter systems, and discloses an axial displacement control type overrun clutch which comprises a clutch body, a damper and an output shaft, the clutch body comprises a deep groove ball bearing, an input shaft, a diaphragm spring set, a spline shaft, a fixing pin, a conversion lining, a ball bearing, a driving gear, a lock washer and a locking nut; the damper comprises a retainer, a damping block and a spring, the output shaft is supported on the starter shell through a deep groove ball bearing, the input end of the output shaft is provided with end teeth, and when the driving gear stretches out and is meshed with the end teeth, the transmission function is achieved. The output end of the output shaft is of an internal spline structure and serves as a torque output connector. By means of the torque-displacement conversion characteristic of the left-hand thread pair, accurate meshing and physical isolation disengaging of the input shaft and the output shaft are achieved. A three-stage transmission control structure is adopted and comprises a torque-displacement conversion module, a damping control module and a spiral meshing module, and the technical defects that a traditional inclined strut type clutch is polluted in lubricating oil, low in torque transmission efficiency and the like are overcome.

The utility model discloses an elevation angle adjusting device for double-shaft tracking, which comprises a main beam, a driving wheel, a fixed mounting plate, a linear driving mechanism, a lower transmission wheel, a transmission rope, a transmission rope fixing piece and a driving mounting rack, the driving wheel is mounted on the main beam, the linear driving mechanism is mounted below the fixed mounting plate, and the lower transmission wheel is mounted on the driving mounting rack. The transmission rope is wound on the driving wheel, the upper transmission wheel and the lower transmission wheel, the upper transmission wheel is installed on the fixed installation plate, the lower transmission wheel is installed on the driving installation frame to form a tight rotating mechanism, and the linear driving mechanism comprises a motor, a lead screw, a lead screw movable plate, a shell, a fixed plate, a first round rod, a second round rod, a first round rod connecting plate and a second round rod connecting plate. According to the double-shaft tracking elevating angle adjusting device, the purpose of tracking elevating angle adjustment is achieved through the arrangement of the structure.

The utility model discloses an impeller structure for a self-priming pump, and particularly relates to the technical field of self-priming pumps, the impeller structure comprises a self-priming pump body, and impeller transmission devices are arranged on the inner wall and the outer wall of the self-priming pump body; the impeller transmission device comprises an impeller body, the supporting and protecting assembly is installed on the outer wall of the self-priming pump body. Compared with the prior art, the impeller structure for the self-priming pump has the advantages that a plurality of groups of flow guide blocks and flow guide grooves are arranged to synchronously stir to increase the collision pressure of a water body, so that the circulation power of the whole water body is further improved, and the problem of low transmission efficiency caused by lower circulation power of the water body is solved; according to the device, through mutual cooperation of a rotating impeller, a flow guide block and a flow guide groove arranged in the driving assembly, the water flow conveying speed is increased, and meanwhile the rotating conveying efficiency of the whole device is further improved.

This invention provides a driving device for a centrally located switchgear valve baffle, comprising an actuating mechanism, an active mechanism, a transmission mechanism, and a guiding mechanism. The actuating mechanism is located on the lower front side of the switchgear truck for the operator to apply force to drive the switchgear truck into the trolley compartment. The active mechanism is located on the left and right rear sides of the switchgear truck for applying force to the transmission mechanism during the movement of the switchgear truck into the trolley compartment. The transmission mechanism includes an upper transmission mechanism and a lower transmission mechanism located on the left and right side plates of the trolley compartment. The upper and lower transmission mechanisms are adapted to drive the upper and lower valve baffles respectively to open under the force applied by the active mechanism, thereby exposing the high-voltage stationary contacts. The guiding mechanism is located on the rear side plate of the trolley compartment for vertically guiding the movement of the upper and lower valve baffles. This application features a clever and simple structural design that can simultaneously drive both sides of the valve baffle, making the opening and closing action of the valve baffle more flexible, stable, and reliable, effectively avoiding valve baffle jamming.

The utility model discloses an electric push rod up-down concentric structure, which comprises a motor, a transmission structure and a telescopic structure, the motor, the transmission structure and the telescopic structure are sequentially connected, the transmission structure comprises a transmission assembly and a transmission shell, the transmission shell wraps the outer side of the transmission assembly, the transmission shell comprises a transmission lower shell and a transmission upper shell, and the transmission lower shell is connected with the telescopic structure. A positioning column is arranged at the top of the transmission lower shell, a positioning hole corresponding to the positioning column is formed in the transmission upper shell, a wire baffle is arranged in the transmission lower shell, and the wire baffle surrounds the peripheral side and the bottom side of the transmission assembly. The electric wire is prevented from being wound into the transmission assembly, grease is not prone to losing, the waterproof groove is formed in the connecting position of the upper transmission shell and the lower transmission shell, the waterproof effect of the outer transmission shell is enhanced, the lower transmission shell and the upper transmission shell are connected through the positioning columns and the positioning holes, and the concentricity of the bearing can be guaranteed.

The invention relates to the technical field of geotechnical engineering equipment, in particular to a drilling, punching and expanding hydraulic drilling rig which comprises a driving rod, one end of the driving rod is fixedly connected with an end, the end, away from the end, of the driving rod is communicated with a connecting pipe, a second gear is fixedly connected to the output end of a first motor, and a second gear is fixedly connected to the output end of a second motor. A drill bit is fixedly connected to the bottom of the end, and an expansion plate is arranged above the drill bit. The side plates on the two sides are fixed, the angle is adjusted through a hydraulic rod, a drill bit is made to conduct punching smoothly, meanwhile, reaming operation is conducted through an expansion plate, reaming operation is conducted while punching is conducted at different angles, meanwhile, a sliding column moves downwards, and an L-shaped rod is locked through a buckle column, a lower transmission column and a transverse rod so that the stability of the expansion plate can be guaranteed; the situation that vibration is generated in the drilling process, so that the expansion plate is uneven in drilling, and pipeline burying is caused to cause pipeline damage is avoided.

The application is suitable for the technical field of gear design, and particularly relates to a low-resistance gear based on the principle of bionics and a gear face design method thereof. The low-resistance gear based on the principle of bionics comprises a gear face, and the gear face is provided with streamlined grooves simulating the groove texture on the surface of shark skin for reducing the resistance during friction. The method comprises the following steps: determining the contour correlation data between a plurality of gear face feature points corresponding to a plurality of to-be-formed gear faces according to the obtained basic parameters and bionic prototype data; determining gear face bionic restriction data according to the contour correlation data between the plurality of gear face feature points and bionic low-resistance design data; and adjusting the contour parameters according to the gear face bionic restriction data corresponding to the plurality of gear face feature points to obtain processed gear face data. The application can solve the problem that the gear face of the designed gear has large sliding friction during meshing, thereby leading to low transmission efficiency.

The application discloses a magnetic gear motor system for a deep-sea robot and a use method thereof, and belongs to the technical field of robots. The transmission mechanism comprises two sets of power assemblies, a magnetic gear transmission assembly and a speed reducer assembly which are symmetrically arranged, wherein the magnetic gear transmission assembly adopts a radial arrangement of a magnetic adjusting ring output scheme, and the air gap between an outer rotor and a shell is eliminated to reduce the machining difficulty. By switching the assembly to drive the motors of the two sets of subsystems and synchronously moving the inner rotors in the reverse direction, non-contact gear shifting of high / low transmission ratio is realized, and mechanical wear is avoided. An independent oil path system prevents the metal chips of the speed reducer from polluting the magnetic gear oil path. By controlling the differential speed or reverse rotation of the two motors, differential speed operation of the output end is realized to reduce the turning radius or make a U-turn in place, and a mechanical differential is omitted. The application has high torque output, non-wear gear shifting and high reliability, and is suitable for deep-sea heavy-load operation.

The utility model provides a transmission structure of a double-sided machine, which comprises a working table, a base, a supporting column, an upper top tray and a transmission structure, the base is fixedly arranged on the working table, the upper end and the lower end of the supporting column are respectively arranged between the upper top tray and the base, the base and the upper top tray are respectively provided with a transmission wheel, and the transmission structure comprises a driving wheel, a transmission rod and a belt. According to the transmission structure of the double-sided machine, the driving wheel drives the transmission rod to conduct transmission, the transmission rod is meshed with the belt, the transmission wheel is driven by the belt to rotate, the upper transmission wheel and the lower transmission wheel are driven by the single shaft to conduct transmission, and the transmission rod is connected with the transmission wheel through the belt. The rotation precision of the upper and lower turntables is improved; meanwhile, an iron wire is arranged in the polyurethane layer to fix the elasticity of the belt, so that the belt is not easy to extend and deform due to pulling in the transmission process, and the conditions that upper and lower groups of components rotate asynchronously and the rotation precision is reduced are avoided.

The present application belongs to the technical field of carton sealing equipment, and particularly relates to an energy-saving high-speed carton sealing equipment and a control method, comprising a transmission assembly and a glue sealing assembly. The transmission assembly is used for transmitting the carton that has been boxed to the center of the glue sealing station. The glue sealing assembly is used for performing linear glue sealing on the top of the glue sealing station during the high-speed movement of the carton. The third roller uniformly arranged on the first pressing plate where the two transmission belts in the transmission assembly are located can effectively reduce the movement resistance of the transmission belt. Meanwhile, the structure of the automatic supply of lubricating grease between the third roller and the corresponding third roller shaft for automatic compensation of lubrication can effectively reduce the rotation resistance of the third roller, thereby improving the movement friction resistance of the transmission belt and reducing the energy consumption of the movement of the transmission belt.

The invention provides a semi-closed compressor based on a built-in motor, and aims to solve the problems of low transmission efficiency, easy leakage and high cost of an open compressor in the prior art. The compression module comprises a base flange, a motor cavity shell, a compression module cavity and an internal motor assembly. According to the invention, the motor is internally arranged to realize full sealing, so that a dynamic shaft seal which is easy to leak is eliminated fundamentally, absolute sealing of hazardous gas is achieved, and the safety is higher; the motor rotor and the compressor spindle are integrated in a direct-drive mode, transmission parts such as couplers are omitted, and the transmission efficiency is improved; a dual cooling scheme of medium internal circulation cooling and stator independent cooling is adopted; a medium flows through the interior of the motor along a preset path, so that heat is effectively taken away; the independent stator cooler strengthens heat dissipation, and solves the problem of motor cooling when the air quantity is insufficient; the compressor integrated structure is high in air inlet temperature adaptability and can still stably operate even under the high-temperature working condition of 100 DEG C or above, and the application scene is greatly widened.

The invention relates to the technical field of electric curtains, and discloses a multidirectional control electric curtain which is characterized by comprising a rail, a transmission box set and a curtain motor, the curtain rail comprises at least one groove set, the groove set comprises an upper rail groove and a lower rail groove, and an upper transmission belt and a lower transmission belt are in transmission connection in the transmission box set; the upper rail groove and the lower rail groove are arranged up and down, the transmission connection position between the upper transmission belt and the lower transmission belt is switched through the motor mechanism, and the left end and the right end, serving as the power end, of the left curtain can be selected; when the two groove sets and the two motor mechanisms are arranged, the power ends at the two ends of the left curtain can be selected, and the power ends at the two ends of the right curtain can also be selected. Therefore, the two ends of the left curtain and the two ends of the right curtain can serve as power ends, and the left curtain and the right curtain can be folded at any position of the track.

The utility model discloses a hoisting winch, which relates to the technical field of hoisting devices and comprises a gear box body, one end of the gear box body is provided with an anchor point fixing end, and one side wall of the gear box body is fixedly connected with a transmission reel support. According to the utility model, the multi-gear input connection port is arranged and is connected with the drill bit of the electric drill, so that various lifting application scenes can be realized; in addition, when a first gear is connected, driving force of a drill bit of the electric drill is output through the center input gear assembly and drives the first transmission winding wheel and the second transmission winding wheel to rotate synchronously in the same direction, the rope wound on the first transmission winding wheel and the second transmission winding wheel can move synchronously, and a heavy object is hung at one end of the rope and lifted. The rope is wound on the upper transmission winding wheel and the lower transmission winding wheel, so that the friction force is larger, the hoisting is more stable, a heavy object cannot slip easily when being hoisted, the equipment safety is improved, and meanwhile, the hoisting load capacity is also improved; and sliding release can be achieved by reducing the number of turns of the rope wound on the transmission winding wheel, and control is accurate.

The utility model discloses a three-group six-shaft type precision numerical control correcting machine which comprises a correcting table, a supporting table is installed on the upper surface of the correcting table, three lower transmission shafts are rotationally connected to the front face of the supporting table, a lower rubber coating wheel is installed on the outer surface of each lower transmission shaft, and a horizontal gear motor is installed on the back face of the correcting table. Through cooperative arrangement of the correction table, the supporting table, a lower transmission shaft, a lower rubber coating wheel, a horizontal gear motor, an up-down correction assembly, a guide assembly and a left-right correction assembly, the aluminum profile to be corrected can be guided and supported through the guide assembly, the aluminum profile can be conveniently corrected in the up-down direction through the up-down correction assembly, and the correction efficiency is improved. The aluminum profile can be corrected in the left-right direction through the left-right correction assembly, the correction requirements of the aluminum profile in multiple directions can be met, the aluminum profile does not need to be corrected in the multiple directions for many times, and the working efficiency during aluminum profile correction can be improved.

The invention provides a BCM analog quantity testing device for controlling an automobile electric appliance, and relates to the technical field of BCM analog quantity testing, the BCM analog quantity testing device comprises a support frame, the top of the support frame is provided with a transmission protection plate; movable plates are slidably mounted on the outer sides of the two guide sliding rods. An upper transmission wheel and a lower transmission wheel are installed in the movable frame, a servo motor is installed on the outer side of the movable frame, and the output end of the servo motor is connected with the upper transmission wheel. The lower transmission wheel is meshed with the side face of the upper transmission wheel, and the lower transmission wheel is meshed with the side face of the rotating gear after moving downwards. The servo motor drives the upper transmission wheel to mesh to drive the lower transmission wheel and then drives the rotating gear to rotate to realize the movement of the adjusting push rod, so that the connection stability of a single test plug and the upper joint of the BCM test module is improved, the test efficiency and accuracy are improved, and the problem of poor connection caused by looseness of individual pins in a multi-channel test interface is solved.

The invention discloses a mode switching mechanism, an air-ground amphibious robot and a mode switching method. The modal switching mechanism is driven by the steering engine, and the side wing assembly can be turned over integrally, so that the direction of the output shaft is switched; in the overturning process of the side wing assembly, the transmission gear can drive the motor to move through the transmission mechanism, and therefore the meshing relation between the first output gear and the output gear set is switched, when the first output gear is meshed with the second output gear, the lower transmission ratio is achieved, the rotating speed is higher, and the requirement for the high rotating speed of the rotor wings in the flying process is met; when the first output gear is meshed with the third output gear, the transmission ratio is higher, and the torque is higher so as to meet the high-torque requirement of wheels during land traveling. The invention relates to the technical field of land-air amphibious robots.

The invention relates to the technical field of planetary speed reducers, in particular to a planetary speed reducer capable of circularly reducing resistance. Comprising a shell, one side of the shell is provided with an input shaft, the side, away from the input shaft, of the shell is rotationally connected with an output shaft, the output shaft is fixedly connected with a planet carrier located in the shell, the planet carrier is rotationally connected with planet wheels distributed at equal intervals in the circumferential direction, and the input shaft is fixedly connected with a sun wheel meshed with the planet wheels distributed at equal intervals in the circumferential direction; an inner gear ring meshed with the planet gears distributed at equal intervals in the circumferential direction is rotationally connected into the shell. According to the planetary reducer, under the condition of large load, firstly, the input shaft and the output shaft are in the low transmission ratio condition, so that the torque of the output shaft is increased, the extrusion force between the planet gear and the sun gear and between the planet gear and the inner gear ring is reduced, abrasion between gears is reduced, in the process, abrasion resistance between the gears is continuously reduced, and the service life of the gears is prolonged. And multiple times of circular treatment are conducted, and the gear is protected.

The utility model provides a direct-drive ordinary clutch and a washing machine thereof, belongs to the technical field of clutches, overcomes the technical defects that an existing ordinary clutch is not compact enough in structure, low in transmission efficiency and poor in stability, comprises an impeller shaft, and is characterized in that the impeller shaft rotatably penetrates through the clutch; the lower end of the impeller shaft is connected with a motor rotor, a dewatering shaft is rotatably arranged on the periphery of the impeller shaft through an oil-retaining bearing, and the dewatering shaft is installed in a bearing support in a one-way rotating mode through a rolling bearing, the product is provided with the impeller shaft and the dewatering shaft which penetrate through the clutch, the structure is compact, the transmission efficiency is high, and the stability is good; the following rotation of the dewatering shaft during washing can be effectively controlled, and the rotation efficiency of the impeller shaft is improved; the impeller shaft is directly connected with the motor rotor, energy loss is small, and transmission efficiency is high; the dewatering shaft is good in installation and connection stability and high in concentricity consistency, and the service life of the clutch can be effectively prolonged.

The utility model discloses a device facilitating loading and discharging of pebbles. The device comprises a track, a hopper, a closing device, an up-down transmission device, a round bar, a limiting plate, a hydraulic oil cylinder and a control device. Front and rear sides of the track are arranged at the upper end of the hopper; the hopper lower end telescopic output groove is provided with an upper end output groove and a lower end output groove; the closing device is arranged at the upper end of the hopper upper-end output groove through screws; fixed push plates are welded to the two sides of the lower end output groove. The up-down transmission devices are arranged on the left side and the right side of the lower end of the upper-end output groove correspondingly and matched with the lower-end output groove fixing push plate correspondingly. And the limiting plate is arranged in the open groove of the output groove at the lower end through a round bar and is matched through a hydraulic oil cylinder. The utility model provides a discharging device facilitating loading of pebbles, which can control the output height and the conveying width, is suitable for loading of freight trucks with different sizes, and can ensure the loading capacity and reduce the truck damage; the device is simple in structure and convenient to use.

The invention relates to the technical field of cables, in particular to an adjustable power cable pair twisting mechanism which comprises a pair twisting unit, a transmission unit and a tooth type power unit. The pair twisting unit achieves integral uniform twisting of cables through synchronous rotation of multiple sets of cable winding rollers, the transmission unit controls continuous transmission of the cables through cooperation of upper and lower positioning wheels and transmission wheels, and the tooth type power unit drives pair twisting and transmission to operate synchronously through linkage of a gear assembly. The adjustable roller frame structure is adopted, rapid disassembly and assembly and distance adjustment of the cable winding rollers are supported, and it is ensured that cables are evenly discharged in cooperation with the transmission guide ring; the transmission assembly controls the transmission speed to be matched with the pair twisting speed through the gear ratio, the problems that in the prior art, pair twisting is not uniform, the transmission efficiency is low, and the adjusting capacity is insufficient are solved, and the device is particularly suitable for efficient machining of overall pair-twisted cables.

The utility model discloses a steering auxiliary structure of a bowl elevator, which belongs to the technical field of material lifting and conveying and comprises a machine body, a transmission chain and a driver, the machine body is composed of a lower horizontal section, a lifting section and an upper horizontal section which are connected end to end, and chain guide rails are respectively fixed on the lower horizontal section, the lifting section and the upper horizontal section. A plurality of steering chain wheels are rotatably arranged between every two adjacent chain guide rails, the steering chain wheels are arranged in an arc shape, a lower transmission gear and an upper transmission gear are rotatably arranged at the outer end of the lower horizontal section and the outer end of the upper horizontal section respectively, the driver is in driving connection with the lower transmission gear or the upper transmission gear, the transmission chain is in a closed shape, and a plurality of dish sets are in driving connection with the transmission chain. The two ends of the transmission chain are meshed with the upper transmission gear and the lower transmission gear respectively, and the middle of the transmission chain is located on the chain guide rail and meshed with the steering chain wheels. According to the structure, the lifting and conveying stability of materials and the moving stability of the transmission chain at the steering position can be improved, and the service life of the elevator is prolonged.

The utility model discloses a structure for quickly adjusting a gap between rollers of a forming machine, which comprises a rack main body, a side roller supporting seat is arranged on the rack main body in a sliding manner, a lower roller shaft and an upper roller shaft are arranged on the side roller supporting seat, a plurality of adjusting grooves are formed in the side roller supporting seat, and an adjusting plate is arranged on the side roller supporting seat at the upper parts of the adjusting grooves; an adjusting seat is arranged on the upper portion of the adjusting plate, an adjusting lead screw is rotationally installed on the adjusting seat, the lower end of the adjusting lead screw is rotationally connected with the upper roller shaft, an up-down transmission shaft is arranged on the upper portion of the side roller supporting seat, an adjusting worm gear is arranged on the adjusting lead screw in the adjusting seat, and a worm section matched with the adjusting worm gear is arranged on the up-down transmission shaft in the adjusting seat. And up-down motors in power connection with the up-down transmission shafts are arranged at the upper parts of the side roller supporting seats. According to the device, the space between the side rollers of the forming unit can be automatically adjusted, the adjusting position can be accurately grasped, and the machining efficiency and effect of the forming unit are improved.

The heavy multi-section telescopic electric cylinder comprises a lead screw set arranged in a cylinder barrel set, the lower end of the cylinder barrel set is connected with a motor transmission assembly, and a servo motor is arranged on one side of the cylinder barrel set. The lead screw set comprises a first lead screw, a second lead screw axially penetrates through the first lead screw, the upper end of the first lead screw is connected with a lead screw transmission assembly, and the upper end of the second lead screw is connected with an idling connecting assembly. The whole structural design of the utility model has the advantages of good rigidity, good stability, strong anti-shearing force, large bearing force, high transmission efficiency, high transmission precision, fast stretching speed, long stretching stroke, strong universality and good verticality of the whole equipment; the multi-section electric cylinder effectively solves the problems that a multi-section electric cylinder in the current market mainly adopts a trapezoidal layout design of a plurality of lead screws, and a sliding telescopic structure of a cylinder barrel is only arranged in one end of the electric cylinder, so that the multi-section electric cylinder has the characteristics of complex structure, low transmission efficiency, poor rigidity, poor shearing resistance, poor stability, poor perpendicularity, small bearing capacity, low cost and the like. The extending stroke is short; and the universality is poor.

The utility model discloses a biaxial tensile test device which comprises a three-phase asynchronous motor, a high-speed output shaft and four tensile transmission devices, and each tensile transmission device comprises an inner transmission mechanism, an outer transmission mechanism, a tensile transmission mechanism and a tensile test mechanism; the internal transmission shaft is provided with a lower transmission gear and an upper transmission gear, the external transmission mechanism comprises an external transmission shaft, and the external transmission shaft is sequentially provided with a low-speed large gear, an elastic pin coupler and a turbine rod from the lower end to the upper end. The stretching transmission mechanism comprises a rotating shaft and a worm gear, and the worm gear is arranged on the rotating shaft and is in transmission connection with a worm gear rod; the tensile test mechanism comprises a lead screw nut and a ball screw, and the ball screw is fixedly connected with the worm gear and is in spiral transmission with the lead screw nut. The three-phase asynchronous motor is matched with the four stretching transmission devices to carry out an experiment, single motor driving and low-force biaxial stretching are realized, the maintenance is simple, the cost is low, the low force required by the test can be met, and no special requirement on the shape of a tested piece exists.

The utility model discloses a crushing device for PVC (polyvinyl chloride) additive production, which comprises a crushing subassembly and a grinding subassembly which are arranged up and down, the crushing subassembly comprises two upper extrusion rollers arranged on the upper side in a crushing subassembly shell and two lower extrusion rollers arranged on the lower side in the crushing subassembly shell; the outer ends of the upper extrusion roller rotating shafts are provided with upper transmission gears respectively, the two upper transmission gears are in meshing transmission, the outer ends of the lower extrusion roller rotating shafts are provided with lower transmission gears respectively, the two lower transmission gears are in meshing transmission, and a driving gear is arranged between the upper transmission gear on the right side and the lower transmission gear on the right side. The upper side of the driving gear is in meshing transmission with the upper transmission gear, and the lower side of the driving gear is in meshing transmission with the lower transmission gear. Power is provided through gear transmission, so that the transmission efficiency is high, and the crushing effect is good; the grinding machine can be suitable for raw materials with different particle sizes, and the particle sizes of the ground raw materials are smaller.