63 results about "Small tooth" patented technology

The coaxial same-frame conjoined star wheel small-tooth-difference speed reducer comprises a box body assembly, a first-stage planetary speed reduction mechanism and a second-stage small-tooth-difference speed reduction mechanism, and the first-stage planetary speed reduction mechanism and the second-stage small-tooth-difference speed reduction mechanism are coaxially and sequentially arranged in the box body assembly; the first-stage planetary speed reducing mechanism comprises an inner gear ring A, a planet carrier A and an input gear shaft which are coaxially arranged, the inner gear ring A is fixedly arranged in the box body assembly, the planet carrier A is rotationally installed in the box body assembly, a plurality of planet gears meshed with the inner gear ring A are rotationally installed on the planet carrier A, and the input gear shaft is rotationally arranged in the planet carrier A; the transmission shaft is meshed with the planetary gear; the second-stage small-tooth-difference speed reduction mechanism comprises an inner gear ring B, an inner gear ring C, an output shaft and a planet carrier B which are coaxially arranged, the planet carrier B is rotationally installed in the position, on one side of the planet carrier A, of the box body assembly and is in transmission connection with the planet carrier A, and the planet carrier A can drive the planet carrier B to rotate at the same speed; the speed reducer is unique in structure and ingenious in design, the problems that an existing speed reducer is large in size and heavy in weight can be effectively solved, and the problems that the existing speed reducer is high in manufacturing cost, narrow in speed ratio range and large in transmission noise can also be effectively solved.

The utility model relates to the field of raft fishing wheels, in particular to a bidirectional clutch structure of a raft wheel. A bidirectional clutch structure of a raft wheel comprises a main body cover and a main body, the main body cover is sleeved on the main body, a rocker arm transmission system is arranged on the main body cover and the main body, the rocker arm transmission system comprises a large tooth, the large tooth is meshed with a small tooth, a tooth sleeve is sleeved below a tooth body of the small tooth, an annular clamping groove is arranged on the upper portion of the tooth sleeve, and the middle of the main body cover is hollow. A circular groove is formed in the inner side wall body of the hollow part, a ratchet wheel body is arranged on the circular groove, a clamping column is arranged at the top end of the ratchet wheel body, the clamping column is clamped in the circular groove, and an upper pressing body and a lower pressing body are annularly arranged on the lower portion of the ratchet wheel body. The clutch structure has the advantages that the clutch shifting button drives the clutch shaft to rotate, the clutch shaft rotates the ratchet wheel body to rotate, the clutch disc is squeezed downwards, the clutch disc receives pressure of the pressure spring, acting force is generated on the annular clamping groove, the clutch effect is achieved, the clutch shifting button rotates back, the clutch disc can reset, and the clutch structure is operated in a two-way mode.

The utility model provides a kind of low vibration, low noise stepping motor, including stator lamination and rotor lamination, the inside of stator lamination and rotor lamination is provided with the small tooth of improving electromagnetic coupling efficiency, the tooth slot ratio, tooth width, tooth shape and the included angle of adjacent small tooth of small tooth are all optimized improvement, the inside of stator lamination and rotor lamination is all increased and is set, it is related to the technical field of stepping motor.The utility model is designed by the tooth slot ratio, tooth width, tooth shape, the included angle of adjacent small tooth, the riveting point of stator lamination eight big poles on small tooth, the tooth slot ratio, tooth width, tooth shape, the riveting point of rotor lamination on small tooth, design optimization is carried out, reduce high harmonic, reduce tooth slot torque, make motor low-speed operation stability better, vibration and noise are smaller.

The invention belongs to the technical field of mining hard alloy, and particularly relates to a mining hard alloy tooth and a passivation method thereof.The passivation method comprises the following steps that S1, a first mining hard alloy tooth and sodium phosphate are obtained; s2, the first mining hard alloy tooth, pure water and sodium phosphate are added into a passivation machine to be passivated, and then the mining hard alloy tooth is obtained; the first mining hard alloy teeth comprise large teeth and small teeth, the diameter of the large teeth is larger than 8 mm, and the diameter of the small teeth is smaller than or equal to 8 mm. The large teeth and the small teeth are matched, so that the contact area is increased, the passivation efficiency is improved, and meanwhile, the production efficiency is also improved; alkalescent sodium phosphate is selected as a passivating agent, so that an oxide layer and impurities of the hard alloy teeth can be removed, a layer of passive film is formed, and the surface quality of the hard alloy teeth is improved; and the interior of the passivation machine is surrounded by resin, and the softness of the resin prevents the hard alloy teeth from falling off edges and corners when poured into the passivation machine.

The utility model discloses a left-right difference ratchet wheel structure which comprises a handle body head, a center installation hole is formed in the middle of the top face of the handle body head, a lower adjusting groove extending backwards is formed in the inner side wall of the middle of the rear portion of the center installation hole, and an installation through hole extending upwards is formed in the bottom face of the rear portion of the handle body head. The ratchet head is inserted into the center mounting hole in a sleeved mode, an outer tooth part is formed on the outer side wall of the ratchet head, a pawl block is inserted into the lower adjusting groove in a sleeved mode, a tooth-shaped part is formed on the front wall face of the pawl block, the tooth-shaped part is matched with the outer tooth part, one half of the tooth-shaped part is a large tooth part, and the other half of the tooth-shaped part is a small tooth part. And the size of the large tooth part is twice that of the small tooth part. Half of a tooth-shaped part of a pawl block is a large tooth part, the other half of the tooth-shaped part of the pawl block is a small tooth part, and the size of the large tooth part is twice that of the small tooth part.

The utility model provides a novel involute small-tooth-difference speed reducer, which relates to the technical field of transmission devices and is characterized in that three eccentric wheels are arranged along the axial direction of an eccentric cam shaft, and an outer gear disc A, an outer gear disc B and an outer gear disc C are respectively sleeved on the corresponding eccentric wheels and are uniformly distributed at an angle of 120 degrees in the eccentric direction; an involute inner gear ring is machined on the inner wall of the shell and connected with outer teeth of the outer gear disc A, the outer gear disc B and the outer gear disc C in a meshed mode to form a small-tooth-difference meshing pair. The novel involute small-tooth-difference speed reducer has the beneficial effects that the novel involute small-tooth-difference speed reducer is mainly meshed with the inner gear through three groups of outer gear discs which are distributed at 120 degrees, so that the load is uniformly distributed, the bearing capacity is improved, and three supporting meshing points are designed, so that the effects of dispersing the force, reducing the deformation of a transmission system and greatly improving the torsional rigidity are achieved; in addition, the speed reducer is provided with the two crossed roller bearings, overturning load force can be borne at the same time, deformation caused by overturning bending moment is reduced, and the overall overturning rigidity is improved.

The utility model discloses a hot wheel self-suction crusher which comprises an upper shell, a lower shell and a fan, wherein the upper shell and the lower shell can be turned over to be opened and closed, and a crushing bin and a discharging cavity are arranged at the bottom in the shells. The device is provided with a hot wheel crushing cutter set and a crushing disc with sharp teeth, and a driving shaft drives the crushing disc to rotate and cut feed. When the blade fan rotates, an air suction area is formed at the upper part to realize self-suction feeding, and an air blowing area is formed at the bottom to assist in discharging; a suction pipe can be inserted into the feeding suction port to suck feed, and a toothed plate is mounted on the inner wall of the upper shell to assist crushing. The crushing disc is provided with large teeth, small teeth and a middle frame, and auxiliary rods are arranged among the large teeth, the small teeth and the middle frame for hanging hammers. The sieve plate is of a semi-arc surface structure and can be replaced in a pluggable mode. The whole structure is compact and reasonable, self-suction feeding, efficient smashing and smooth discharging are achieved through cooperation of all components, the smashing efficiency is improved, and operation and storage are convenient.

The utility model belongs to the technical field of automobile seats, and particularly relates to an automobile monotonous seat angle adjuster, a seat and an automobile, the angle adjuster comprises a guide plate, a plurality of small teeth are installed on the guide plate in a sliding mode in the radial direction; a top pressing block is fixedly mounted on the unlocking square column, and an unlocking piece is mounted on the top pressing block; the jacking blocks are positioned on the inner sides of the small teeth; the large toothed plate is rotationally installed on the guide plate, a cavity is formed in the large toothed plate, the unlocking piece, the small teeth and the jacking block are all located in the cavity, and a plurality of clamping teeth meshed with the small teeth are arranged on the inner wall of the large toothed plate in the circumferential direction; an elastic structure is arranged between the guide plate and the jacking block; the free end of the unlocking square column penetrates through the guide plate to be connected with a return spring, and the free end of the return spring is hung on a hanging point of the lower seat basin connecting plate. The utility model aims to solve the problem that the adjusting function of a seat backrest fails due to the tooth sliding phenomenon during locking caused by insufficient elasticity of an elastic structure in an existing angle adjuster.

The application discloses a large internal ratchet wheel machining method, which comprises the following steps: S1, rotating a machine tool B shaft; S2, tooling a ball cutter (4) installed on the machine tool B shaft accessory with any two points on a large tooth surface of a tooling slot and any one point on a small tooth surface respectively to obtain coordinate values of each tooling point in a cutter tip coordinate system; S3, according to the intersection of a tooth root virtual circle under the cutter tip coordinate system and the connecting line of the two tooling points on the large tooth surface, the intersection point constitutes the coordinate values of a tooth root vertex in the cutter tip coordinate system, and the coordinate values of the tooth root vertex in the cutter tip coordinate system and the offset of the cutter tip coordinate system relative to a part coordinate system are obtained according to a trigonometric function relationship; and S4, the offset is used for compensating the cutter tip position deviation generated by the rotation of the machine tool B shaft. The technical effect of the application is that qualified large internal ratchet wheels are machined by compensating the cutter tip position deviation and the part tooth slot phase deviation, qualified large internal ratchet wheels are machined on a machine tool by using a common ball cutter, and production cost is saved.

This utility model is a self-balancing gearbox with small tooth difference, which includes at least two axial revolving gears and an eccentric counterweight. The number of teeth of the axial revolving gears B is different, resulting in different centrifugal forces. By adding a matching eccentric counterweight T to the existing structure, and providing specific gearbox structural requirements and installation methods, a more compact structure and smoother operation are achieved.

1. Name of this design: Body of the male head of the rope stopper. 2. Application of this design: The overall application of this design is as follows: This design is a male head of a rope stopper, which is used to cooperate with the female head of a corresponding rope stopper to tension and clamp the rope extending through it with small teeth. It can be used in footwear and clothing. The product is used in a specific application as the main body of the male connector of a rope stopper. 3. The key design features of this product are the shapes of the parts shown by solid lines in each view of Design 1 and the parts not covered by dark green in each view of Design 2. 4. The picture or photo that best illustrates the key design points: Design 1 3D diagram 1. 5. Design 1 is designated as the basic design. 6. Other matters requiring explanation: The dashed lines in the views of Design 1 and the parts covered in dark green in the views of Design 2 are for illustrative purposes only and do not constitute part of the protection claimed in this design application.

The utility model discloses an embracing type bridging coupling oil pipe centralizer which is formed by oppositely splicing a front semi-cylindrical structural body and a rear semi-cylindrical structural body which are symmetrical in structure, the structural bodies are of an integrated structure, and the two structural bodies are clamped through a plurality of steel belts. Each structural body is formed by sequentially connecting a small tooth block, an upper closing groove, a large tooth block, a middle closing groove, a middle structure, a middle closing groove, a large tooth block, an upper closing groove and a small tooth block from top to bottom; and the small tooth block, the upper closing groove, the large tooth block and the middle closing groove are all semi-cylindrical. The outer diameters of the small tooth block, the large tooth block and the middle structure are equal, and the height of the small tooth block is smaller than that of the large tooth block; the sum of the outer diameter of the upper closing groove and the thickness of the steel belt and the sum of the outer diameter of the middle closing groove and the thickness of the steel belt are equal to the outer diameter of the middle structure. The whole structure is easy to achieve, convenient to install and not prone to displacement. In addition, the manufacturing cost is low, and meanwhile the device can still be repeatedly used after pump inspection and well repair.

The utility model relates to the technical field of blank pressing and oil making, in particular to a blank pressing machine for oil making. According to the blank pressing machine for oil production, a first through groove and a second through groove are formed in the side walls of the two sides of a blank pressing machine body in the length direction. The first fixing block is arranged in the first through groove, and the second fixing block is arranged in the second through groove. A first gear is arranged at one end, penetrating through the first fixing block, of the rotating shaft of the first blank pressing roller. A duplicate gear is arranged at the position where one end of a rotating shaft of the second blank pressing roller penetrates through the second fixing block. When the first fixing block and the second fixing block are located at the first horizontal position, the first gear is meshed with the small teeth in the duplicate gear. And when the first fixing block and the second fixing block are located at the second horizontal position, the duplicate gear is adjusted, and the first gear is meshed with the large teeth in the duplicate gear. The blank pressing machine solves the problems that an existing blank pressing machine can only press blanks with the fixed thickness and cannot meet the requirements for different oil plants and different oil making processes, and the suitable thicknesses of the required blanks are different.

The application belongs to the technical field of mining hard alloy, and particularly relates to a mining hard alloy tooth and a passivation method thereof, the passivation method comprising the following steps: S1, obtaining a first mining hard alloy tooth and sodium phosphate; S2, adding the first mining hard alloy tooth, pure water and the sodium phosphate into a passivation machine for passivation to obtain a mining hard alloy tooth; the first mining hard alloy tooth comprises large teeth and small teeth, the diameter of the large teeth is greater than 8 mm, and the diameter of the small teeth is less than or equal to 8 mm. The application increases the contact area and improves the passivation efficiency by matching the large teeth and the small teeth, and the production efficiency is also improved; the sodium phosphate with weak alkalinity is selected as the passivating agent, the oxide layer and impurities of the hard alloy tooth can be removed, a passivation film is formed, and the surface quality is improved; moreover, the passivation machine is surrounded by resin, and the softness of the resin prevents the hard alloy tooth from being poured into the passivation machine to cause edge and corner defects.

The utility model discloses a multi-punching-tooth riveting press forming gear, and relates to the technical field of gear machining and manufacturing, the multi-punching-tooth riveting press forming gear comprises a knurled shaft pin and further comprises a connecting mechanism arranged on the outer side of the knurled shaft pin, and the connecting mechanism can reduce cost while guaranteeing the strength of the gear. The multiple sets of large driven teeth and the multiple sets of small driving teeth are all arranged on the outer side of the knurled shaft pin in a sleeving mode, a traditional large tooth is evenly divided into three identical single large driven teeth through stamping equipment, a traditional small tooth is divided into three single small driving teeth, and the unique multi-stamping-tooth riveting forming technology can meet the set working condition requirement and also can be used for manufacturing the large driven teeth and the small driving teeth. The obvious technical advantages are also shown.

The utility model discloses a positioning vehicle driving small tooth anti-falling device, belongs to the technical field of mechanical driving degradation prevention, and is used for realizing a positioning vehicle driving small tooth falling early-stage trend alarm function and a positioning vehicle driving small tooth sudden falling protection function. The device comprises a lug plate, a support, a tray, a bearing, a base, a clamping plate, a small pigment ball and a distance detection limiting switch, the lug plate is composed of two right-angle-shaped fixing plates, the lug plate is connected with the upper end of the support, the outer side of the base is in a disc shape, and a plurality of through holes are formed in the outer side of the base. In addition, the device has a unique dual-alarm mechanism, namely electrical and mechanical dual-alarm, also has a leveling function and a resetting function, is creative and novel, is high in reliability, and has a relatively high popularization value.

The invention relates to a drive unit (1) and a motor vehicle comprising the drive unit (1). Two drive units (2) of the drive unit (1) are positioned opposite each other and are radially symmetrical, each comprising: - an electric traction machine (5), - a stepped planetary gear (6) with a stepped planetary gear (7) and with a large ring gear (8) that meshes with a large tooth ring (11) of the stepped planetary gear (7), and with a small ring gear (9) that meshes with a small tooth ring (12) of the stepped planetary gear (7), - a braking device (14) by means of which the small ring gear (9) or the large ring gear (8) can be selectively braked on a drive unit housing (15) of the associated drive unit (2), - a brake actuator (22) with two actuator output elements (23), wherein one of the actuator output elements (23) is kinematically coupled to one of the brake devices (14) for actuating the corresponding brake device (14), and the other of the actuator output elements (23) is kinematically coupled to the other of the brake devices (14) for actuating the corresponding brake device (14), and the actuator output elements (23) are coupled to each other in such a way that they can be moved exclusively synchronously.

The application relates to a kind of parts final inspection machine, including rack, in and out material assembly module, material taking module, height detection module and rotary table assembly detection module;The upper end of rack is formed with supporting surface;In and out material assembly module is set to one side of supporting surface, height detection module and rotary table assembly detection module are set to the other side of supporting surface;Height detection module is located at the side of rotary table assembly detection module, rotary table assembly detection module includes horizontal rotary table, six stations are uniformly arranged on horizontal rotary table along circumference, and final inspection module is arranged on the outer periphery of horizontal rotary table;Final inspection module includes small tooth visual detection unit, small head center hole detection unit, helical tooth outer diameter ring gauge detection unit, helical tooth mistake-proof detection unit, laser marking unit, scanning rating unit;Material taking module is set on supporting surface, the automation of the present application realizes the feeding and discharging of parts and shifts work between each detection procedure, effectively improves detection efficiency, and improves the degree of automation.

The utility model relates to a low-speed stable high-torque stepping motor, which comprises a stator iron core, the stator iron core is installed in the stepping motor, the stator iron core comprises an iron core outer frame and magnetic poles, the iron core outer frame is of a square structure, the number of the magnetic poles is even, the magnetic poles are evenly installed on the inner side of the iron core outer frame, and a winding cavity is formed between every two adjacent magnetic poles. The magnetic pole is located on the asymmetric center line of the iron core outer frame, and the end portion of the magnetic pole is provided with a triangular tooth shape. The angle of the magnetic pole is rotated, and the end part of the magnetic pole is designed into a triangular tooth shape, so that the magnetic flux is increased, the effects of reducing temperature rise and increasing torque are achieved, and the low-speed, stable and large-torque stepping motor is realized. According to the scheme, the magnetic pole angle of the stator core is adjusted, the tooth shape of the small teeth on the magnetic pole is optimized, the magnetic path channel is enlarged, and the motor performance is improved.

A wind power yaw variable pitch speed reducer adopting a small tooth difference structure for transmission relates to the technical field of yaw transmission of wind driven generators, and can meet the requirement of large speed ratio of the yaw speed reducer and reduce the transmission stage number of planetary gears through combination of a small tooth difference structure transmission mechanism and a planetary transmission structure, thereby effectively reducing the weight and the size of the speed reducer. And the functions of reducing cost and increasing efficiency are realized. According to the wind power yaw variable-pitch speed reducer adopting the small tooth difference structure for transmission, a yaw speed reducer box body is composed of a motor base, an upper machine body, a fixed gear ring and a lower machine body; the lower machine body is fixed on a rack of the wind generating set; the motor base and the upper machine body, the upper machine body and the fixed gear ring, and the fixed gear ring and the lower machine body are respectively connected through bolts; the yaw speed reducer box body is fixed during working, and motor power is output to a yaw gear ring through an open gear after speed reduction and torque increase through a gear in the speed reducer.

The invention, which belongs to the technical field of the AC excitation generator motor, discloses a modularized magnetic field reinforced rotor structure of an AC excitation motor, comprising asymmetric small tooth modules, symmetric small tooth modules, rotor large tooth modules, slot wedges, a rotor yoke part, an inner-layer split concentrated winding and an outer-layer magnetic field reinforced winding. The rotor yoke part is provided with rotor large-tooth modules along the circumferential direction, and an inner-layer split concentrated winding is arranged between the adjacent large-tooth modules; one sides, without tooth tips, of the asymmetric small tooth modules are connected with the slot wedges, and the symmetric small tooth modules are alternately connected with the slot wedges and then are connected with the other asymmetric small tooth module, so that a small tooth-slot wedge combined module is formed; the small tooth-slot wedge combination modules surround the outer side of the rotor yoke part, and the outer layer magnetic field strengthening windings are arranged between the adjacent small tooth-slot wedge combination modules. The motor slot current density is lower through rotor transformation, the pole slot matching is more flexible in selection, the design of low slot current and high air gap magnetic flux density of the motor is realized, and the operation reliability of the large motor is improved.

The spiral energy storage spring and the compression spring are integrated inside, or the spiral energy storage spring, the magnetic spring and the plane spring are integrated inside, so as to realize energy storage and passive flexibility, reduce the driving consumption and meet the requirements of driving agility. [Solution] A flexible joint based on an elastic element is disclosed, including an involute small tooth difference reducer, a spiral energy storage spring, and a flexible output module / composite flexible output module. The involute small tooth difference reducer uses only an eccentric input shaft, a pair of involute internal tooth rings, and involute planetary gears to realize involute planetary gear oscillation and rotation. The power output of the output platen is transmitted through the interaction of the column pin and the first column pin operating hole of the involute planetary gear or the second column pin operating hole of the output platen. The precision requirements can be easily met by simply using a pair of gears meshing, the axial dimension is compact, and the pair of gears use an involute tooth profile, so manufacturing costs are low.

An arc-shaped oscillating saw blade with large and small teeth and an oscillating saw are provided. The arc-shaped oscillating saw blade with large and small teeth includes a connecting part and a cutting part. Sawteeth of the cutting part are arranged in an arc shape, and a plurality of adjacent sawteeth form a sawtooth unit, and each sawtooth unit includes a plurality of large teeth and a plurality of small teeth, thus forming a structure with the large and small teeth interleaved. With structural design of the saw blade with interleaved large and small teeth, an effective cutting area of the saw blade can be increased. With design of incremented angles, the sawteeth distributed in the arc shape can be formed, which facilitates reducing of the impact and vibration in the cutting process and further improves the cutting accuracy.

The utility model discloses a motor, compressor and air conditioning equipment, and relates to the technical field of motors, the motor comprises a stator and a rotor, the stator comprises a yoke part and a plurality of tooth parts extending inwards from the yoke part, the stator is provided with a first stator section and a second stator section in the axial direction, and the second stator section is arranged at the axial end part of the stator; the tooth width of the tooth part of the first stator section in the circumferential direction is larger than the tooth width of the corresponding position of the second stator section, and a stepped structure is formed in the axial direction; the rotor is rotatably arranged on the stator; the gap between the first stator segment and the rotor is larger than the gap between the second stator segment and the rotor. According to the technical scheme provided by the utility model, the distance between the area with small tooth width and the rotor is increased, and the magnetic resistance of the magnetic circuit in the area is increased, so that the magnetic saturation phenomenon of the motor is reduced, the harmonic wave of air gap flux density is reduced, the iron loss is reduced, and the energy efficiency of the motor is improved.

The present application relates to the field of robot technology, and discloses a small volume and large torque robot hip gear transmission mechanism, comprising a shell, an input shaft and an output shaft installed above the shell, a parallel helical tooth reduction mechanism, an eccentric small tooth difference reduction mechanism and a planetary load sharing reduction mechanism arranged in series along a power transmission path inside the shell, and a lubricating oil circuit arranged in the shell. The three-stage series reduction structure of the parallel helical tooth reduction mechanism, the eccentric small tooth difference reduction mechanism and the planetary load sharing reduction mechanism enables the transmission mechanism to realize step-by-step speed reduction and torque increase, and the large speed ratio characteristic of the eccentric small tooth difference is matched with multi-stage transmission to obtain stable output torque in a small installation space, effectively solving the problems of large volume and poor space adaptability of the traditional hip reducer.

The application discloses a tensioner assembly automatic assembly system, which comprises a shell assembly work station, a large tooth frame assembly work station, a guide block assembly work station, a small tooth frame assembly work station, a spring assembly work station and an assembly work station. The large tooth frame assembly work station is suitable for assembling a large tooth frame into an inner groove of a shell to form a shell assembly. The small tooth frame assembly work station and the spring assembly work station are suitable for assembling the small tooth frame into an inner groove of the guide block and assembling the spring into an outer wall of the guide block to form a guide block assembly. The assembly work station is suitable for assembling the shell assembly and the guide block assembly to form a tensioner assembly. The oiling process of the outer wall of the guide block is arranged behind the spring assembly work station, so that the oil loss is reduced, and the oil stain problem in the system is reduced. When the oiling is performed, the spring can be compressed, the outer wall of the guide block is exposed when the spring is deformed, and thus the oiling can be directly performed.

The utility model discloses an extrusion forming die for an aluminum profile of a driving device, which comprises an upper die and a lower die, a die core is arranged at the bottom of a connecting column protruding from the middle of the bottom surface of the upper die, and a plurality of flow dividing holes which are circumferentially spaced and vertically penetrate through the upper die are formed in the periphery of the connecting column; a plurality of forming holes are formed in the peripheral wall of the mold core in an inwards-concave mode and penetrate through the lower end face of the mold core, and a forming wall is arranged between every two adjacent forming holes. The forming holes comprise larger screw column forming holes and smaller tooth forming holes; a flow guide opening is formed in the position, corresponding to the screw column forming hole, of the joint of the connecting column and the mold core in a concave mode, and the flow guide opening is inwards concave and downwards extends to communicate with the screw column forming hole. The width of the forming wall is larger than that of the tooth forming hole, and a mold core flow stopping block is arranged on the forming wall in an outward protruding mode. Therefore, the structural strength of the screw column of the extruded aluminum profile can be effectively improved.

The utility model discloses a small-tooth-difference speed reducer, and belongs to the technical field of speed reducers. The small-tooth-difference speed reducer comprises an eccentric shaft. The at least two external gears are arranged on the eccentric shaft; the flange assembly comprises an outer flange and a supporting flange which are located on the two sides of the outer gears respectively, and the outer flange, the at least two outer gears and the supporting flange are connected through pin shafts; wherein a first gasket is arranged between every two adjacent outer gears, and second gaskets are arranged between the outer gears and the outer flange and between the outer gears and the supporting flange. Compared with the prior art, the speed reducer with the small tooth difference is good in damping performance, and the reliability and the service life of equipment can be effectively improved.

The utility model discloses a thin film switch key sheet punching device which comprises a main body unit which comprises a lower platform and a base plate located over the lower platform. The horizontal fine adjustment unit comprises a plurality of wedge-shaped blocks transversely and slidably connected with the upper side wall of the lower platform and a plurality of fixing lugs fixedly installed on the upper side wall of the lower platform, the fixing lugs are in threaded connection with corresponding screw rods, and each screw rod penetrates through the corresponding fixing lug to be rotationally connected with the corresponding wedge-shaped block; a small tooth column is rotationally connected to the side, away from the wedge-shaped block, of the fixing lug, a large tooth disc meshed with the small tooth column is fixedly connected to the end, away from the wedge-shaped block, of the threaded rod, and a top block abuts against the corner of the lower side wall of the base plate. According to the utility model, the cutter does not need to be replaced when the cutter is abraded, so that the time delayed by shutdown is saved, the production cost of membrane switch punching is reduced, and the punching efficiency of the punching equipment on the membrane switch key sheet is improved.

The invention discloses a large and small tooth surface local deformation identification system and method based on image processing, and belongs to the technical field of tooth surface local deformation identification. A large and small tooth surface local deformation identification system based on image processing comprises an image acquisition module used for acquiring local image data of a large and small tooth surface from front and side angles in real time, an image analysis module used for performing multi-category integration on images, screening high-quality images, performing noise reduction and enhancement processing and graying the images, and a large and small tooth surface local deformation identification module used for identifying the large and small tooth surface local deformation. And then gear contour key points are extracted to establish an absolute coordinate system, the image processing module compares a received image with original accurate image data to obtain qualified and unqualified image data, and the information output module transmits the qualified and unqualified image data to a display device. According to the large and small tooth surface local deformation recognition system based on image processing, the tooth size and tooth surface local deformation can be quickly recognized in mass production through the system.