48 results about "Tooth rotation" patented technology

Methods and apparatus for producing controlled tooth-moving forces are provided. An orthodontic appliance includes one or more occlusal surface features that modify bite forces between opposing teeth during intercuspation to aid in realignment of the teeth. The interception bite forces can be applied between appliance shells on opposing arches, or between an appliance shell and an opposing tooth. These modified bite forces can be used to supply or augment tooth-moving forces, and the tooth moving forces can produce moments to urge rotational movement of a tooth. Also described herein are orthodontic appliances having an occlusal outer surface contours that are distinct from the occlusal inner surface contour within the dental appliance and may be configured to selectively intercuspate.

The invention provides a milling vibration stability predicating method based on the process damping effect. According to the method, in the milling process of a workpiece, the geometric structure parameter of a milling tool and the dynamic parameter in the milling process are obtained, the total energy generated by ploughing and milling force in the workpiece milling process in one cutter tooth rotation cycle is determined, the damping coefficient of the equivalent linear process is obtained through the law of conservation of energy, equivalent linear process damping is converted into equivalent process damping in the x direction and equivalent process damping in the y direction, the equivalent process damping coefficient in the x direction and equivalent process damping coefficient in the y direction are input into a milling dynamics equation, a milling dynamics model based on the process damping effect is obtained, a ZOA method is adopted to solve the milling dynamics model based on the process damping effect, and a vibration stability model based on the process damping effect is obtained, so that relation between extreme stability cutting depth and the cutter rotation speed is obtained, and a vibration stability steel lobe diagram based on the process damping effect is drawn.

The invention discloses an overrun clutch. The overrun clutch comprises an operation rod, a first cover plate, a middle rotation block, a second cover plate, an internal-external tooth rotation ratchet wheel and a pawl, wherein a first end of the operation rod is used for bearing exerted loads, the first cover plate is connected to a second end of the operation rod, one surface of the middle rotation block is connected to the first cover plate, the second cover plate is connected to the other surface of the middle rotation block, the internal-external tooth rotation ratchet wheel is coaxial with the middle rotation block, an installation track used for installing balls is formed between external teeth of the internal-external tooth rotation ratchet wheel and internal teeth of the internal-external tooth rotation ratchet wheel, the first cover plate and the second cover plate are installed at the two ends of the balls inside the installation track in a supported mode, a first end of the pawl is connected to the middle rotation block in a rotating mode, and a second end of the pawl is arranged anticlockwise relative to the first end of the pawl and can mesh with the internal teeth of the internal-external tooth rotation ratchet wheel. According to the overrun clutch, force exerted on the internal-external tooth rotation ratchet wheel by the pawl is direct driving force instead of friction force, so that part abrasion is reduced, stress concentration is avoided, and a lever is formed among the pawl, the middle rotation block and the operation rod and can transmit large torque.

The orthodontic bracket system includes a bracket having a base for attachment to a tooth surface, a stem above the base, tie wings extending from the stem for securing ligatures, and an archwire slot for receiving an archwire defined by the stem and tie wings. Distal and mesial side surfaces of the bracket base are perpendicular to the archwire slot to allow a rotational device to apply rotational force to a tooth perpendicular to the archwire with direct vector-line guidance. Occlusal and gingival edges of the bracket base between the tie wings are scooped-out or recessed to provide more space to receive a tool under an elastic ligature, and select corners of the tie wings are beveled enlarging space to facilitate entry of instruments for removing wire ligatures, to facilitate instrument access for removal and replacement of ligatures, while streamlining tooth rotation to make arch correction more efficient.

The invention discloses a power cabinet with good heat dissipation effect and high safety, comprising a power cabinet box, a cooling device is arranged inside the power cabinet box, a telescopic motion device is arranged on one side of the cooling device, and the cooling device is A temperature sensor is provided on the side of the device away from the telescopic motion device. In the present invention, the hot air of the power cabinet box can be blown away by the fan provided with the cooling device, and the effect of cooling can be achieved. The moving gear rotates, thereby driving the first and second rotating teeth to rotate. The first and second rotating teeth make the telescopic rod move up and down. The telescopic rod drives the fan to blow air up and down to make the cooling effect better. The temperature sensor can sense the air in the air. If a fire occurs, the temperature rises, and the temperature sensor receives a signal, which can effectively control the fire source.

The invention discloses an engine crankshaft signal disc abrasion detection method and device and an electronic control unit. According to the engine crankshaft signal disc abrasion detection method,whether the crankshaft signal disc is worn or not can be determined according to the difference value between the tooth rotation parameter value and the standard parameter value, and if the absolute value of the difference value is not smaller than a preset threshold value, determining that the crankshaft signal disc is abraded; in addition, according to the characteristic tooth position of the crankshaft, the characteristic tooth position of the cam shaft and the difference value, and determining the abrasion type of the crankshaft signal disc and the position of the abrasion of the crankshaft signal disc. According to the engine crankshaft signal disc abrasion detection method, whether the crankshaft signal disk is worn or not can be determined, the abrasion type of the crankshaft signaldisc and the abrasion position of the crankshaft signal disc can be determined, and the abrasion of the crankshaft signal disc can be rapidly processed.

The present invention discloses an establishing method for a depressed auxiliary arch tooth rotation angle prediction model and relates to the technical field of orthodontic treatment. The establishing method comprises the following steps: 1) analyzing structural features and loading characteristics of a depressed auxiliary arch; 2) establishing a lateral view arc correction torque equation of thedepressed auxiliary arch; 3) establishing an anterior view arc correction torque equation of the depressed auxiliary arch; 4) establishing a dynamic resistance model in a wax jaw ridge simulated tooth movement process; and 5) establishing the depressed auxiliary arch tooth rotation angle prediction model. The establishing method for the depressed auxiliary arch tooth rotation angle prediction model can provide parameter supports for physicians to use the depressed auxiliary arch to correct high-angle type overlying jaws, assists doctors to improve safety and predictability of the orthodontictreatment, and improves digitization degrees of the oral cavity orthodontic treatment.

The invention provides a rotation center design inspection method and a shell-shaped dental device design and a preparation method. The rotation center design inspection method comprises the followingsteps of classifying a single digital dental crown model, fitting a long axis of the single digital dental crown model, determining an impedance center of the digital dental crown model, simulating atooth arrangement design of the digital dental crown model, and optimally adjusting the rotation center, wherein a preset position of an inspection rotation center is designed based on a ratio of moment generated by applying to the digital dental crown model and the balanced moment produced by applying to a digital teeth appliance and rotation amount in tooth arrangement design, thereby realizingoptimal adjusting of the rotation center. Through single digital dental crown model classification, dental crown model long axis fitting, impedance center determination, tooth arrangement design androtation center optimization adjustment, the designed tooth rotation center is basically consistent with the rotation center in the actual correction process, the tooth treatment effect conforms to the expected effect, and medical negligence is further avoided.

The invention discloses a one-piece molar-back-pushing device. The device comprises: a pair of retention pieces, wherein a pair of the retention pieces is separately fixed at the palate side of dentalcrowns of molars at the two side of the oral cavity; a connecting body which is arranged between a pair of the retention pieces in a connection mode; traction hooks, wherein a plurality of the traction hooks comprise front traction hooks and side traction hooks, the front traction hooks are arranged on the connecting body, and the side traction hooks are respectively arranged on the retention pieces; at least one micro screw which is fixed at the palate part of the oral cavity and is positioned at the far middle side of the connecting body; and at least one connecting piece, wherein each connecting piece is arranged between one micro screw and one traction hook in a connection mode. The one-piece molar-back-pushing device is simple in structure and convenient to use, can push back molarsas far as possible within the physiological limit, can effectively overcome the defects of lip inclination of anterior teeth, cheek inclination of posterior teeth, tooth rotation and the like, and reduces the implantation number of micro screws.

The invention discloses an invisible appliance for III type malocclusion. The appliance is provided with energy storage components, an appliance body is made from a polymer material, and traction hooks or lingual side buckles are attached to the lingual sides of C6 and D6 and labial sides and lingual sides of C4 and D4 of the corresponding tooth positions on the appliance; each pair of the traction hooks or lingual side buckles between the lingual sides of C4 and C6 and between the lingual sides of D4 and D6 are sleeved with rubber bands, spring wires, stainless steel wires, titanium-nickel alloy and other energy storage components, and the positions between the traction hooks or lingual side buckles at the labial sides of C4 and D4 and biological anchorage nails knocked in the mandibularalveolar bone of the corresponding same side are also sleeved with congeneric energy storage components. When the whole pushback force is formed to the underjaw, the whole anchorage of the teeth is ensured, and front tooth lip leaning or tooth rotation cannot be caused. The appliance adopts a 3D technology, is combined with digital orthodontic software, solves the problems of bite, malocclusion and crowded dentition by fixing the rubber bands, the spring wires, the stainless steel wires, the titanium-nickel alloy and the other energy storage components on the traction hooks or lingual side buckles bonded or integrally formed on the invisible appliance, achieves the correction purpose of quickly moving teeth, can greatly shorten the correction cycle, can also avoid a jaw opening surgery, and greatly reduce wounds.

The invention provides a rotation center design inspection method, shell-like dental instrument apparatus design and a preparation method. The rotation center design inspection method comprises the steps of classifying single digital dental models, fitting long axes of the single digital dental models, determining the impedance center of the digital tooth models, simulating the tooth arrangement design of the digital tooth models, and optimizing and adjusting a rotation center. Based on a ratio of moment applied and generated on a digital tooth crown model to trimming moment applied and generated on a digital tooth treatment appliance and a preset position of a rotation amount design inspection rotation center during tooth arrangement design, optimizing and adjusting of the rotation centerare realized. The single digital tooth models are classified, the long axes of the tooth models are fitted, the impedance center is determined, tooth arrangement design is performed, and the rotationcenter is optimized and adjusted, so that the designed tooth rotation center and the rotation center in an actual treatment process is basically consistent, the tooth treatment effect conforms to desired effects, and generation of medical care accidents is further avoided.

The invention discloses a rapid installation type anti-freezing faucet. A valve core is of a pipeline structure with water feeding from the lower portion and discharging from the upper portion; the lower portion of an outer tooth rotation rod is connected with a movable ceramic chip through a convex groove structure; the upper portion of a fixed seat is welded to the lower portion of a fixed pipe;a lifting inner pipe is arranged in the fixed pipe; an inner tooth connector is welded to the lower end of the lifting inner pipe and internally provided with a one-way valve, and the inner tooth connector is in clearance fit with an outer tooth on the upper portion of the outer tooth rotation rod; a locking nut and a fixing connection nut sleeve the upper middle portion of the fixed pipe; a clearance is formed between the lower portion of the fixing connection nut and the fixed pipe; and the upper end of a pre-buried pipeline is inserted into the clearance and connected with an internal thread of the fixing connection nut. According to the rapid installation type anti-freezing faucet, the effects that water is conveniently used outdoors in winter, and the pipeline and the faucet are freeof freezing and cracking are ensured, engineering construction is not needed, the market vacancy is filled in, no energy source is wasted, the situation that heat is preserved by consuming energy isavoided, professional staff construction is not needed, installation, maintenance and replacement can be achieved only through a simple tool, installation is rapid, and maintenance is convenient and fast.

The invention discloses a tower crane rotation limiter in tower crane operation. The tower crane rotation limiter comprises a rotating seat and a base which are distributed up and down, the top of the base is rotatably connected with the bottom of the rotating seat through an outer tooth rotation support, a driving gear is connected to the outer ring of the outer tooth rotation support in a meshing mode, and the driving gear is vertically and rotatably installed in a limiter installation frame through a driving shaft; two limiting devices are installed at the upper end and the lower end of the driving shaft, each limiting device comprises a bearing with an inner ring fixedly connected with the outer wall of the driving shaft, a gear ring is rotatably connected to the outer ring of each bearing, a plurality of clamping teeth consistent in direction are evenly distributed on the inner wall of each gear ring, a plurality of limiting ratchet structures are connected to the inner wall of the inner ring of each bearing, and the limiting ratchet structures extend towards the inner walls of the gear rings and are matched with the clamping teeth; and the clamping teeth on the upper limiting device and the lower limiting device are opposite in direction. The clamping teeth on the upper limiting device and the lower limiting device are opposite in direction, so that when the gear rings on the upper limiting device and the lower limiting device at different positions rotate, the driving shaft can be driven to rotate in different directions.

The invention discloses an electromechanical combined asynchronous interlocking tooth pushing lock. A rear lock cylinder of the electromechanical combined asynchronous interlocking tooth pushing lock is completely disconnected from a connector and a front lock cylinder; the connector is hidden in an invisible hole; a tooth rotation wheel, a rotation angle and a rotation disk lock the front lock cylinder, a locking head locks the rear lock cylinder, the front and rear lock cylinders asynchronously rotate for warning, and an electronic remote control device is mounted in a power supply circuit of an electromagnet. The electromechanical combined asynchronous interlocking tooth pushing lock integrates the functions of electromechanical interlocking invisibility, mechanical interlocking, invisibility, connecting invisibility of the front lock cylinder and the rear lock cylinder and asynchronous warning, so that a thief cannot open an interlocking device and cannot rotate the rear lock cylinder; even if a tooth pushing device and a connecting locking device are damaged in a barbarous way, only the front lock cylinder can be rotated while the rear lock cylinder cannot be rotated. Even if the thief drills out the front lock cylinder and the rear lock cylinder by using an electric hand drill and rotates a connecting tongue by using a tool such as a clamp, a rotary contact is not in contact with a fixed contact, so that the power supply circuit of the electromagnet cannot be switched on; in addition, the electronic remote control device switches off the power supply circuit of the electromagnet, and a transverse safety lock pin cannot be opened, so that a complete and thorough anti-theft effect can be achieved.

The invention discloses a dodecagonal spline tooth rotation preventing self-locking check ring which comprises a part body (1). The part body (1) is shaped like a short pipe with one end closed. The closed end of the short pipe is provided with a dodecagonal spline tooth hole (2) coinciding with the central axis of the short pipe. The outer cylindrical face of the short pipe is provided with an external thread (4). The inner wall of the short pipe is provided with sunken deformation pits (3) uniformly distributed along the circumference. The end face of the unclosed end of the short pipe is provided with screwing notches (5) uniformly distributed along the circumstance. The check ring has the beneficial effects of having a self-locking function and having an ability to prevent rotation. The check ring is sufficient in strength, firm and reliable in connection, and particularly suitable for limiting the axial position of a part in the hole after the part in the hole is assembled, and can be applied to other occasions with large axial loads.

The invention discloses a tooth pushing electromechanical mixed anti-theft alarm lock. A connecting body which is hidden inside an invisible hole is disconnected with a rear lock cylinder, a front lock cylinder is locked by an expansion piece and a tooth rotation wheel, the front lock cylinder and the rear lock cylinder which are completely disconnected asynchronously rotate to alarm, an electric remote control device is installed inside a power supply circuit of an electromagnet in an invisible mode, and an oblique hanging direct pushing rotary type unlocking mode is adopted; electromechanical interlocking invisibility, mechanical interlocking, invisibility, connection invisibility of the front lock cylinder and the rear lock cylinder and asynchronous alarm are integrated, a burglar cannot open an interlocking device and rotate the rear lock cylinder, and namely, only the front lock cylinder rotate and the rear lock cylinder cannot rotate after the interlocking and self-locking portions are damaged through barbaric means; even the burglar drills the front lock cylinder and the rear lock cylinder through an electric hand drill, a connecting bolt rotates through tools such as a clamp, a rotary contact point which is in contact with a contact point being not fixed cannot switch on the power supply circuit of the electromagnet, the power supply circuit of the electromagnet is interrupted through the electric remote control device, and a safety lock bolt cannot be opened.

The invention discloses a molar back push device. The device comprises at least one retention part, at least one implantation nail and at least one connecting piece; each retention part comprises a retention part and a traction hook; the retention parts are connected to the dental crown palate sides of premolar, first molar and second molar on one side of the upper jaw of an oral cavity; the traction hooks are respectively arranged at the near-middle ends of the retention parts; the implantation nails are in one-to-one correspondence with the retention parts, and each implantation nail is located between the palatal root of the first molar and the palatal root of the second molar on the same side as one retention part and is close to the second molar; and each connecting piece is connectedbetween one planting nail and one traction hook on the same side. Through the device, the molars can be moved backwards as much as possible within a physiological limit, stress application is more flexible, and adverse molar buccal inclination and tooth rotation are avoided. Meanwhile, the bonding area is increased, bonding strength is improved, intraoral stability of the device is optimized, clinical use is facilitated, and the device has good comfort.

The invention discloses an electromechanically-combined, asynchronous interlocking and additional tooth-pushing anti-theft lock. A connector of the electromechanically-combined, asynchronous interlocking and additional tooth-pushing anti-theft lock is disconnected from a rear lock cylinder, a locking head locks the rear lock cylinder, an expansion sheet, a tooth rotation wheel and a lock column lock a front lock cylinder, the front lock cylinder and the rear lock cylinder are completely disconnected and asynchronously rotate for alarming, and an electronic remote control device is mounted in a power supply circuit of an electromagnet invisibly. The electromechanically-combined, asynchronous interlocking and additional tooth-pushing anti-theft lock integrates the functions of electromechanical interlocking invisibility, mechanical interlocking invisibility, connection invisibility of the front lock cylinder and the rear lock cylinder and asynchronous alarming, so that a thief cannot unlock an interlocking device and cannot rotate the rear lock cylinder; even if interlocking and self-locking parts are damaged in a barbarous way, only the front lock cylinder can be rotated while the rear lock cylinder cannot be rotated. Even if the thief drills out the front lock cylinder and the rear lock cylinder by using an electric hand drill and rotates a connection tongue by using a tool such as a clamp, a rotary contact is not in contact with a fixed contact, so that the power supply circuit of the electromagnet cannot be switched on; in addition, the electronic remote control device switches off the power supply circuit of the electromagnet, and a transverse safety lock pin cannot be unlocked, so that a thorough anti-theft effect can be achieved.