64results about How to "Smooth meshing" patented technology

The utility model discloses a multi-head rotating device, an electric cleaning brush and an electric tool, and belongs to the technical field of electric tools, the multi-head rotating device comprises a power mechanism, a transmission mechanism and a working mechanism, the transmission mechanism comprises an inner shaft and an outer shaft, the working mechanism comprises an inner disc body and a transmission wheel, and the inner disc body is provided with a rotating head. The inner disc body rotating along with the inner shaft drives the rotating head to revolve around the central axis of the inner disc body, and the transmission wheel rotating along with the outer shaft drives the rotating head rotating around the central axis of the rotating head at the same time. The electric cleaning brush comprises the multi-head rotating device. The electric tool comprises the multi-head rotating device. Due to the fact that all the rotating heads are arranged on the inner disc body, the inner disc body and all the rotating heads can serve as an installation module, when the transmission wheel drives all the rotating heads to rotate through gear matching, transmission matching of all the rotating heads and the transmission wheel can be achieved while the inner disc body is connected to the inner shaft, all the rotating heads do not need to be installed one by one, and the assembling efficiency can be improved.

The invention discloses a forming die for automobile part machining, relates to the technical field of automobile plastic part machining, and aims to solve the technical problem that a forming die for automobile steering wheel machining is single in function. The forming die comprises an upper die block and a lower die block, and the top end of the lower die block is of an inner-outer structure and is provided with a hub groove and a covering arc groove A; the hub grooves are communicated through a plurality of spoke grooves, a plurality of hole columns are annularly and fixedly arranged on the hub grooves at equal intervals, covering arc grooves B are formed in the positions, opposite to the covering arc grooves A, of the bottom end of the upper die block, feeding through holes B are formed in the covering arc grooves B, and feeding through holes A are formed in the positions, opposite to the hub grooves, of the upper die block. Rim mechanisms are arranged at the ends, close to each other, of the upper module and the lower module, covering mechanisms are arranged in the upper module and the lower module, and the rim mechanisms are connected with the covering mechanisms through adjusting mechanisms. The fabric has the advantage of being high in functionality.

The invention relates to a precision detection device for gear processing, which is suitable for detecting the dynamic performance and single tooth precision of a gear, and comprises a base, a rotating bracket, a fixed block, a motor, a reduction gearbox, a test gear, a to-be-tested gear, a main measuring rod, a plurality of measuring rods and the like. High-precision detection of gear dynamic balance, vibration parameters and the tooth outer end and the contour line of a single gear is achieved, the reduction gearbox reduces the rotating speed of the gear and strengthens torque control, and the gear thickness difference design is matched, so that the multiple measuring rods can slide along the tooth outer end of the gear, tooth surface deformation and the contact state are accurately detected, and the device is made of high-carbon low-alloy tool steel. The gear detection device has high strength and wear resistance, adapts to various gear specifications, can output detection data and analysis results in real time, is simple to operate, high in detection precision and high in applicability, and can be widely applied to the fields of gear manufacturing, quality detection and maintenance.

The utility model relates to an annealing device for improving the glittering transparency of a glass product, which comprises a workbench, two side guard plates symmetrically fixed above the workbench, an annealing module arranged on the workbench, a conveying mechanism arranged between the two side guard plates, and a plurality of mounting plates arranged on the conveying mechanism along the conveying direction at intervals in an array manner, a mounting seat is mounted on each mounting plate, a vertically extending shaft rod is rotatably mounted at the top of each mounting seat, a placing seat for placing glass products is fixed at the end of each shaft rod, and a linkage mechanism is arranged on the side protecting plate on one side. The linkage mechanism is arranged on the side protecting plate on one side, in the process that the conveying mechanism conveys glass products, the linkage effect of the linkage mechanism is used for driving the shaft rod, the containing base and the glass products to rotate, the glass products rotate automatically in the advancing process, the uniformity of heating and annealing of all the positions of the glass products is guaranteed, and the glass products are prevented from being damaged. The glittering and translucency of the glass product is effectively improved.

The invention discloses a machining method for an input shaft of an electric drive assembly generator. The machining method comprises the following steps of first finish turning, second finish turning, gear hobbing, spline broaching, heat treatment, spline hard broaching, outer circle and end face grinding and gear grinding. In the step of hard pulling of the spline, the internal spline is subjected to hard pulling after being heated, the large diameter, the small diameter and the tooth side of the internal spline are subjected to hard pulling, and the precision of the internal spline subjected to heat treatment is corrected. In the step of grinding the outer circle and the end face, an internal spline of the input shaft of the generator is expanded, the end face and a center hole are positioned, and the outer circle and the end face of the input shaft of the generator are ground. In the gear grinding step, the internal spline of the input shaft of the generator is expanded, the end face is positioned, and gear grinding is conducted on the gear. Thermal deformation of the internal spline is corrected after heat treatment, then the internal spline is adopted as a standard for machining of subsequent procedures, the standard is unified, and it is guaranteed that the internal spline of the generator input shaft and the external spline of the generator rotor are well matched, torque is transmitted, a bearing operates stably, and operation stability of an electric drive assembly is guaranteed.

The utility model relates to a transportation reversing mechanism for a manipulator. The device comprises a workbench, gear teeth are fixedly connected to the middle of the workbench. A first vertical plate is fixedly connected to the bottom of the workbench; the middle part of the first vertical plate is fixedly connected with an electric push cylinder; the output end of the electric push cylinder is fixedly connected with a sliding block. The sliding block is in sliding connection with the workbench. The middle of the sliding block is rotationally connected with a gear. The gear is meshed with the gear teeth; the middle part of the gear is fixedly connected with a connecting rod; the middle part of the connecting rod is fixedly connected with a supporting seat; a mechanical arm body is fixedly connected to the top of the supporting seat; an electric push cylinder pushes a sliding block to enable a gear and gear teeth to be meshed, so that the mechanical arm body rotates along with a connecting rod, direction conversion of the device in the mechanical arm body conveying process is achieved, the mechanical arm body can convey workpieces to working faces with more spatial layouts, the range of the workpiece conveying path of the mechanical arm body is expanded, and the working efficiency is improved. And the adaptability of the mechanical arm body to various complex production environments is enhanced.

The utility model discloses a rotary guide core-pulling structure capable of shortening an injection molding period, and relates to the technical field of injection molds. Comprising a bottom die main body, the bottom die main body is provided with a guide core-pulling mechanism used for an injection mold, the guide core-pulling mechanism comprises a rotating assembly and a fixing block arranged on the side wall of the bottom die main body, and a locking block is connected with a locking groove in a clamping mode, so that a connecting block can be effectively fixed; the connecting block is prevented from moving due to pressure fluctuation of the hydraulic rod or other factors, so that stable meshing of the gear rod and the annular gear is guaranteed, high pressure in the injection molding process is effectively resisted through rigid locking, displacement of the mold core is prevented, and the forming precision of precise structures such as threads is guaranteed; the energy is saved, the action time is shortened, locking and unlocking operation can be achieved by rotating the screw, and the device is simple, convenient and easy to control.

The invention relates to the field of anti-electromagnetic technology, in particular to an anti-electromagnetic interference box body which comprises an anti-electromagnetic box body, a fixing frame arranged on one side of the anti-electromagnetic box body and a box door arranged on the outer side of the fixing frame and matched with the anti-electromagnetic box body, and the center of the inner side of the anti-electromagnetic box body is filled with a shielding plate. One side of the anti-electromagnetic box body is connected with a concentric-square-shaped electromagnetic shielding plate, one side of the concentric-square-shaped electromagnetic shielding plate is connected with a box door through a fixing frame, the fixing frame is of a concentric-square-shaped structure, an inner lining plate of the concentric-square-shaped structure is fixedly installed in the side, close to the concentric-square-shaped electromagnetic shielding plate, of the fixing frame, and the inner lining plate and the box door are matched and attached to each other. And a rotating shaft is rotationally connected to one side of the lining plate on the fixing frame. The movable shielding plate in the inner lining plate is unfolded through rotary closing of the box door, the movable shielding plate in the inner lining plate is retracted through rotary opening of the box door, back-and-forth switching is stable, the supporting plate and the connecting plate in the fixing frame operate stably and smoothly, and structural connection is stable and ingenious.

The utility model relates to an efficient heat dissipation drum brake shoe which comprises a shoe and a lining arranged on the shoe in a sliding mode, a sliding groove is formed in the surface of the shoe, a sliding strip used for being connected into the sliding groove in a sliding mode is arranged on the upper surface of the lining, a limiting block is arranged on the surface of the shoe in a sliding mode, and clamping blocks are arranged on the two sides of the limiting block in a rotating mode. Racks are arranged on the surfaces of the limiting blocks and the surfaces of the sliding strips, the limiting blocks drive the clamping blocks to rotate while sliding towards the sliding strips, the clamping blocks are used for limiting and fixing the limiting blocks while the limiting blocks are meshed with the racks of the sliding strips, and the problems that the gaskets are fixed through fastening bolts, the bolts are loosened after long-time use, or the gaskets are not stably fixed, and the service life of the gaskets is prolonged are solved. And the safety cannot be guaranteed.

The invention provides a clamp for preparing an impact sample notch by using an optical curve grinding machine and the optical curve grinding machine, and belongs to the technical field of optical curve grinding machines. The jig of the present invention comprises: a base plate; a base; the lower chuck is arranged at the lower part of the base and on the bottom plate; one end of the upper chuck extends into the base and can slide in the base, and the other end of the upper chuck is located outside the base; the spring compression head is located in the base, and one end is connected with one end of the upper chuck; one end of the ejector rod extends into the base, and the other end of the ejector rod is located outside the base and used for extruding the other end of the spring compression head. The spring compression head is driven by the ejector rod to drive the upper chuck to move, so that the device can adapt to different sample sizes, and meanwhile, machining of various machine tools such as an optical curve grinding machine is facilitated. The optical curve grinding machine comprises the clamp and the grinding wheel dresser. According to the shape of the grinding wheel trimmed by the grinding wheel trimmer, errors of the shape and the size of a machined impact notch can be smaller, and the impact test result is stable.

This utility model discloses a metallurgical material crusher, relating to the technical field of crushers. The crusher includes a housing; a pair of crushing rollers, both rotatably mounted inside the housing for crushing materials; a pair of annular components, rotatably mounted on the two side walls inside the housing; and a pair of conveying shovels, fixedly mounted between the pair of annular components. By setting rotatable annular components on both sides of the housing and fixing conveying shovels between them, and cooperating with a drive mechanism to drive the annular components to rotate, the material that has been crushed once at the bottom of the housing can be continuously scooped up and re-conveyed between the pair of crushing rollers for further crushing. This design fundamentally solves the key problem of "uneven material particle size and inconsistent powder specifications" caused by the "traditional crushers can only crush once" in the background technology, ensuring the consistency of the particle size of the final crushed product and greatly improving the processing quality of powder metallurgy raw materials.

The utility model relates to a kind of helical gear pump with multiple-tooth number asymmetric same modulus involute tooth profile, belong to helical gear pump technical field. Including back cover, positioning pin, floating sleeve, driving helical gear, driven helical gear, high-pressure sealing assembly, sealing ring, front cover, rotating lip skeleton oil seal, hole with clasp spring, bolt and pump body;Driving helical gear and driven helical gear are multiple-tooth number asymmetric same modulus involute tooth profile helical gear.The driving helical gear and driven helical gear in the utility model adopt multiple-tooth number asymmetric same modulus involute tooth profile, while increasing tooth thickness, leave out rotation space for addendum, ensure the strength and the stability of operation of gear, under the same addendum circle diameter, compared with standard helical gear, increase 4-6 tooth number, reduce flow pulsation, reduce noise.

The utility model belongs to the technical field of chain wheels, and particularly relates to a high-stability tooth skipping prevention chain wheel which comprises a chain wheel body and protective rings, a plurality of wheel teeth are distributed on the outer edge of the chain wheel body in the circumferential direction, the protective rings are symmetrically arranged on the two sides of the wheel teeth, and each protective ring sequentially comprises an annular baffle, a middle ring and a connecting ring from outside to inside. The connecting rings are installed on the upper surface and the lower surface of the chain wheel body, a plurality of chip removal holes are formed in the annular baffle in the circumferential direction, and an oil supply sponge is arranged on the side, close to the wheel teeth, of the annular baffle. Smooth meshing of the chain and the chain wheel is ensured; the oil supply sponge abuts against the chain to lubricate the chain and the chain wheel, so that stable meshing of the chain and the chain wheel is guaranteed, and the problem of tooth skipping is avoided.

The utility model provides a kind of petroleum chemical fluidized bed reactor, including reactor body, the top of the reactor body is provided with feed assembly, the feed assembly includes the feed pipe that is communicated with the top of reactor body, the upper portion of the feed pipe is provided with feed pipe, the outside of the top end of the feed pipe and the outside of the bottom end of feed pipe are jointly slidably connected with sleeve, the inner wall of the sleeve is fixedly connected with L-shaped scraper, the feed assembly further includes the transmission structure for driving L-shaped scraper rotation and cleaning the inner wall of feed pipe, which is arranged above the reactor body. When the inner wall of the feed pipe and the feed pipe is left, the L-shaped scraper can clean the inside of the feed pipe and the feed pipe, and the heavy oil, residual materials such as residual oil adhering to the inner wall of the pipe can be scraped off, so that the feed pipe and the feed pipe can smoothly convey the raw materials, and the normal operation of the reactor body is ensured.

The three-jaw manipulator comprises a supporting frame, an air cylinder is fixed to the upper portion of the supporting frame, the end of the air cylinder penetrates through the supporting frame, a grabbing assembly is arranged between the end of the air cylinder and the supporting frame, and the grabbing assembly comprises a movable plate fixed to the end of the air cylinder; the bottom of the supporting frame is fixedly provided with three evenly-distributed U-shaped blocks, and the three U-shaped blocks are each rotationally provided with an upper claw arm. According to the three-jaw mechanical arm for the doll machine, the positions of the adjusting jaws can be pulled at will, a drawing ring is loosened after adjustment is completed, a restraining rod is driven to reset rapidly under the elastic force effect of an abutting spring, a restraining ratchet wheel is locked in a one-way mode, at the moment, a push rod can be pulled upwards, and then a sliding plate is extruded by a whole eccentric pressing roller; and the friction pad and the friction layer are in contact extrusion, so that the position of the adjusting claw is quickly and stably locked, the extension length of the adjusting claw is conveniently controlled to adapt to different scenes, and the operation is convenient.

The present invention relates to the technical field of welding processing, and specifically to a laser welding device for large thin-walled cylinders, comprising a base, wherein two sliding seats are slidably provided on the base, wherein a first rotating frame is rotatably provided on one of the sliding seats, and a second rotating frame is rotatably provided on the other sliding seat, the second rotating frame has the same structure as the first rotating frame, an inner ring groove and an outer ring groove are coaxially provided on the first rotating frame, and a plurality of supporting members are provided in the inner ring groove and the outer ring groove, the supporting members comprising a sliding block and a supporting roller, the sliding block can slide along the inner ring groove and the outer ring groove, and the supporting roller can slide radially along the first rotating frame relative to the sliding block, so that the supporting roller braces the inner wall of the cylinder, and a supplementing mechanism is also provided on the first rotating frame, the supplementing mechanism can drive the supporting member of the inner ring groove to slide toward the outer ring groove, so that the number of supporting members in the outer ring groove increases with the increase of the diameter of the cylinder, thereby ensuring the shape of the cylinder and improving the welding quality.

The utility model relates to the field of ironmaking production devices, and discloses an adjustable supporting structure which comprises a fixing mechanism, the fixing mechanism comprises a fixing plate, vertical supporting plates are fixedly arranged at the positions, close to the two sides, of the upper end of the fixing plate, and an arc-shaped plate is fixedly arranged in the middle of the upper end of the fixing plate. A helical tooth rack is fixedly arranged on the upper surface of the arc-shaped plate, a rotating mechanism is arranged at the upper end of the fixing mechanism and comprises a horizontal supporting plate and a first motor, concave plates are fixedly arranged at the positions, close to the two sides, of the lower end of the horizontal supporting plate, and sliding grooves are formed in the positions, close to the front end and the rear end, of the upper end of the horizontal supporting plate; the output end of the first motor is fixedly connected with a worm through a telescopic rod, and an adjusting mechanism is arranged in the rotating mechanism. According to the supporting structure, the rotating mechanism and the adjusting mechanism are arranged in the supporting structure, the rotating mechanism can drive the rotary furnace to rotate front and back, and the adjusting mechanism can slightly adjust the position of the movable frame.

The application relates to a simple synchronizer device of a gearbox, and belongs to the technical field of automobile gearboxes. The simple synchronizer device comprises a gear shifting gear train which comprises a transmission shaft, a first gear and a reverse gear which are sleeved on the transmission shaft and are axially spaced on the transmission shaft, and annular grooves are formed on the sides adjacent to the first gear and the reverse gear; and the simple synchronizer device comprises a synchronizer sleeve which is engaged on the transmission shaft and is located between the first gear and the reverse gear, and a conical elastic snap ring which is arranged in the annular grooves of the first gear and the reverse gear and is in frictional engagement with the slope surface of the synchronizer sleeve, and the conical elastic snap ring is fixed in the annular grooves in the circumferential direction. When the gearbox is shifted, the synchronizer sleeve and the conical elastic snap ring are in frictional engagement, the rotational speed of the synchronizer sleeve and the first gear or the reverse gear is basically consistent, the synchronizer sleeve of the gearbox is smoothly engaged with the gear spline, and the automobile runs more stably.

The application provides a involute variable-thickness gear pump, and belongs to the technical field of fluid machinery. The gear pump adopts a pair of involute variable-thickness driving gears and driven gears to form a parallel shaft external meshing pair, the thickness of the gears continuously changes along the width direction, and the meshing gap can be self-adaptively adjusted through axial position fine adjustment; the gear pair forms a gradual meshing area along the axial direction, has a dynamic thickness compensation effect, can significantly reduce fluid oil trapping, reduce flow pulsation, improve volumetric efficiency and operation stability. The application has simple structure and strong adaptability, can be compatible with straight teeth / oblique teeth, external meshing / interior meshing structure, and is suitable for high-pressure, low-noise, long-life hydraulic and fluid conveying systems.

The application discloses a planetary gear motor assembling device and assembling method, and the planetary gear motor comprises a motor assembly, the motor assembly comprises a motor end cover, a motor body is installed on one side of the motor end cover, a through hole is arranged in the center of the motor end cover, and an output shaft of the motor body penetrates through the through hole and is fixedly connected with a sun gear; and a gear box assembly is arranged, the rotating driving mechanism is arranged to be in transmission connection with a planet carrier, the planet carrier is driven to rotate in the process that the second fixing mechanism moves towards the first fixing mechanism, so that each planet gear revolves around the central shaft of the planet carrier, and the circumferential position of the planet gear is continuously adjusted. The arrangement enables the sun gear to actively search for the tooth gap between the planet gears and enter the tooth gap in the axial advancing process, effectively avoids the problems of tooth tip collision and meshing failure caused by the random circumferential position of the planet gear, realizes lossless and smooth meshing of the sun gear and the planet gear, and significantly improves the assembling yield.

The utility model relates to the field of pressure gauge calibration, in particular to a multifunctional pressure calibration device with a quick switching device, which is characterized in that a calibration pipe is arranged at one end of a main body, so that pressure gauges at two ends are communicated with the interior of the main body; the connectors are installed outside the pipe connected with the pressure gauge to be detected, one end of one connector is connected with the adapter bolt, the multiple sets of universal adapter assemblies are annularly distributed in the adapter bolt, and one side of each universal adapter assembly can be matched with pressure gauges with interfaces of different sizes. According to the universal adapter assembly, the adapter bolt is connected with the outer side of one end of each of the pressure gauges of various models and specifications in a meshed mode, the problem of tedious replacement of the adapter is avoided, the calibration efficiency of the pressure gauges is improved, the screwing device is rotationally connected to the bottom of the adapter bolt, and one side of the universal adapter assembly can be extruded through rotation of the screwing device; the connection part of the other side of the universal switching assembly and one end of the pressure gauge is engaged more firmly, and the detection accuracy is prevented from being influenced by a gap generated by too large pressure.

The utility model relates to a kind of block forming machine demolding synchronous devices, including synchronous gear, synchronous frame and two parallelly arranged synchronous shafts, both ends of each the synchronous shaft are equipped with synchronous gear, and the same side end of two synchronous shafts is connected by synchronous frame, the synchronous frame includes adjusting frame, connecting rod, demolding ejector rod and two parallelly arranged racks, the tooth surface of two racks is oppositely arranged, and two racks are respectively engaged with the synchronous gear on corresponding synchronous shaft, the connecting rod is connected in the lower end of two racks, the demolding ejector rod is connected in the upper end of two racks, the position of the rack on connecting rod and demolding ejector rod is adjustable, and the both ends of adjusting frame are equipped with adjusting bolt in pairs, and the adjusting bolt of the both ends of adjusting frame is respectively abutted on the outside of two racks. The block forming machine demolding synchronous device of the utility model can ensure the engagement of rack and gear by adjusting.

The present invention discloses a PDC drill bit with partially movable blades, including a drill bit body, fixed blades, movable blades, a power conversion mechanism and a transmission mechanism; the power conversion mechanism can be an impeller driven mechanism, a screw motor driven mechanism or an electric motor driven mechanism; the transmission mechanism includes a cam rod, a push rod, a spring, a rotating pin shaft and a fixed pin shaft, and the drill bit body is provided with fixed blades and movable blades, each blade is provided with a PDC tooth, and each movable blade can realize periodic telescopic motion under the action of the transmission mechanism, and at the same time, a combined motion is superimposed with the rotary cutting motion. Under this combined motion, the cutting path of the PDC teeth on the blade will no longer be a circular trajectory but a periodic non-circular trajectory, which can efficiently break the rock ridges generated after the PDC teeth on the fixed blade are cut. This patent can improve the drilling speed and rock breaking efficiency of the drill bit, enhance the drilling stability of the drill bit, and extend the service life of the PDC teeth on the fixed blade, thereby improving the comprehensive performance of the drill bit.

The utility model relates to the technical field of tower foundations, and discloses an electric tower foundation structure which comprises a foundation body and a circular truncated cone fixedly connected to the upper surface of the foundation body, a plurality of bolts are evenly embedded and fixedly connected to the upper surface of the circular truncated cone, and nuts are connected to the outer portions of the bolts in a threaded mode. The upper end of the nut is located outside the bolt and is fixedly connected with a ratchet wheel, and a positioning mechanism is arranged in front of the bolt; through a matching mechanism of the ratchet wheel and the pawl, the nut is effectively prevented from rotating anticlockwise, and the problem of looseness caused by vibration or external force after fastening is solved; a limiting rod in the positioning mechanism is automatically embedded into a pawl under the action of a second spring to form double locking, so that stable meshing of the pawl and a ratchet wheel is further ensured, and accidental dislocation is avoided; the anti-settling capacity of the foundation structure is remarkably improved through the tip design of the reinforcing rod; the design enhances the stability and safety of the whole structure, and has the advantages of high practicability and high reliability.

The utility model discloses aggregate batching hopper of concrete mixing station separates baffle, including two lift baffle in the batching hopper inner chamber: the bottom fixedly connected with support frame of batching hopper, the top of lift baffle is provided with lifting assembly, lifting assembly includes the fixed frame fixedly connected in the top of batching hopper, the top fixed mounting of fixed frame has servo motor, the output shaft fixed connection of servo motor has screw rod, the top of lift baffle is provided with the fixed connection of lift baffle with screw pipe of screw pipe, the utility model discloses through the cooperation and use of batching hopper, support frame, discharge hopper and conveyer, to aggregate is batching delivery to the use under, under the cooperation and use of lifting assembly, to the lift baffle has played the lifting effect, thereby changed the space layout of batching hopper inner chamber, prevents the mixing phenomenon of different kinds aggregate simultaneously, can reach the purpose of effectively preventing aggregate not batching mixture and quick change batching hopper space layout.

The utility model discloses a speed chain conveying structure which comprises a speed chain conveying belt, a baffle is arranged outside the speed chain conveying belt, one end of the baffle is connected with a vertical transmission assembly, a tensioning wheel is arranged on one side of the vertical transmission assembly, and the lower end of the vertical transmission assembly is connected with a belt transmission assembly. According to the double-speed chain conveying belt tensioning device, the two tensioning wheels move downwards at the same time to restore the tension of the double-speed chain conveying belt, firstly, the two tensioning wheels are opposite to one tensioning wheel, the downward moving distance of the tensioning wheels can be reduced, the two tensioning wheels can exert equal pulling force on the two sides of the double-speed chain conveying belt, the whole chain of the double-speed chain conveying belt is evenly stressed, and therefore the tensioning effect of the double-speed chain conveying belt is improved. And compared with a single tensioning wheel, the problems of chain deviation, distortion and the like can be avoided, the tension recovery effect of the speed chain conveying belt is further improved, the effect of temporarily recovering the tension of the speed chain conveying belt is achieved, and it is guaranteed that the current work progress is not affected.

The air conditioner comprises a machine shell, a heat exchanger assembly, an air duct assembly and a driving assembly, and the machine shell is provided with an air inlet and an air outlet; the opening and closing door is movably arranged on the machine shell so as to open and close the air outlet. The driving assembly is arranged in the machine shell and comprises a driving mechanism used for driving the opening and closing door to move, the driving mechanism comprises a driving motor and a transmission mechanism, and the transmission mechanism is in transmission connection with a motor shaft of the driving motor and the opening and closing door and comprises a transmission gear and a transmission rack which are meshed. The transmission gear is meshed with the transmission rack in a herringbone tooth meshing mode. According to the air conditioner, the meshing gap between the transmission gear and the transmission rack is small, noise is low, axial force is small, meshing between the transmission gear and the transmission rack is more stable, low noise and low vibration of the driving mechanism are achieved, the transmission mechanism can conduct transmission stably, and therefore the driving mechanism drives the opening and closing door to operate stably.