12results about How to "Avoid backlash" patented technology

The utility model relates to a kind of exhaust structure of motor gear box for vehicle, including exhaust valve in gear box, labyrinth, backflow plate and several baffle, backflow groove is formed between backflow plate and gear box inner wall, baffle makes several intercommunicating chambers in gear box, chamber is between labyrinth and backflow groove, chamber is communicated with backflow groove, chamber is also communicated with labyrinth, exhaust valve is communicated with labyrinth, backflow groove is equipped with backflow port with gear box interior communication in both ends, oil liquid into chamber can flow through backflow groove and return in gear box, after the air pressure in gear box rises, gas is discharged from exhaust valve via labyrinth.The utility model is by being equipped with baffle, reduce the oil liquid that splashes when gear rotates enters labyrinth, also reduce the oil liquid reaching labyrinth entrance, effectively avoid the oil leakage situation of exhaust valve, oil liquid in chamber flows through backflow groove and returns in gear box, reach the effect of oil liquid backflow;Gas can avoid gear box oil leakage after being discharged.

The present invention relates to a method for controlling the aperture size of a via hole on a TFT substrate, wherein the via hole penetrates an interlayer insulating layer and a gate insulating layer, and the method comprises: depositing an amphoteric metal layer mask on the interlayer insulating layer; performing a first dry etching on the amphoteric metal layer mask to obtain a via hole pattern; performing a second dry etching on the TFT substrate to form a via hole; and performing an alkaline solution wet etching on the amphoteric metal layer mask. The method provided by the present invention avoids the backlash phenomenon, effectively enhances the control of the aperture size, thereby controlling CD LOSS, and ensuring the overlap resistance and electrical characteristics of the product.

The utility model relates to a bearing protection device of mechanical grading mill, including frame, two main motors are installed to both sides of frame, the output of two main motors installs grading wheel drive, grinding disc drive respectively, grinding disc drive and grading wheel drive connect hollow shaft and solid axle through V type belt respectively, solid axle is placed in hollow axle hole, grinding disc is installed on hollow axle, and is inside the cavity of grinding cavity, grading wheel is installed on solid axle, and is above grinding disc inside the cavity, the upper and lower end of hollow axle is provided with big bearing respectively, and is supported by big bearing, the upper and lower end of solid axle is provided with small bearing respectively, and is supported by small bearing, the outer ring of grinding disc is provided with toothed grinding ring, the cavity of grinding cavity is provided with air guide ring below, and air guide ring is below toothed grinding ring, compared with prior art, the utility model can improve the service life of bearing, reduce the wear and tear and failure risk of bearing, and further improve the effect of equipment grinding and grading.

The utility model provides a kind of die casting die, including fixed mould and movable mould, slider core, slider seat, locking mechanism, including first driving part and the locking block that moves along preset path by the drive of first driving part, slider seat has the recess portion matched with locking block, in the mould closing state, locking block is inserted into recess portion to lock slider seat in the lower part of slider seat;Locking mechanism further includes indicating rod, one end of indicating rod is connected with locking block and can follow locking block and move along preset path, movable mould is provided with the passage for the other end of indicating rod to extend to outside.The die casting die is provided with locking mechanism at movable mould, slider seat is locked from the lower part of slider seat, avoid the phenomenon that slider seat and slider retreat in injection filling process, and indicating rod is provided on locking block, the moving path of indicating rod is same with preset path of locking block, and operating personnel can judge the state of locking block according to the position of indicating rod in passage.

The heavy hinge with the angle measuring function comprises a first hinge body, a second hinge body and a rotating shaft connected with the first hinge body and the second hinge body, the rotating shaft is rotationally assembled with the first hinge body and fixedly assembled with the second hinge body, and at least one end of the rotating shaft is provided with a split encoder; a main body of the split type encoder is fixedly connected with the first hinge, and an inductive head of the split type encoder is coaxial with the rotating shaft and fixedly connected with the rotating shaft. According to the structural design, additional independent sensor installation space and structure are omitted, the structure is compact and integrated, meanwhile, a direct mechanical transmission path is adopted, back clearance, abrasion or errors possibly caused by middle transmission links (such as gears and connecting rods) are avoided, and the reliability of the sensor is improved. Therefore, the reliability, accuracy and long-term stability of angle measurement are remarkably improved while the overall structure is simplified and the assembly complexity is reduced.

The invention discloses a cavity aerosol administration device for nursing old people, and relates to the technical field of aerosol administration. The device comprises a bottom plate, the lower end face of the bottom plate is fixedly connected with a connecting structure, an inner cavity of the connecting structure is in threaded connection with a storage structure, one side of the upper end face of the inner cavity of the connecting structure is fixedly connected with a pressurizing structure, and the other side of the upper end face of the inner cavity of the connecting structure is fixedly connected with a transfusion structure; the side, matched with the pressurizing structure, of the upper end face of the connecting structure is fixedly connected with an air inlet connecting structure, supporting structures are symmetrically connected between the two adjusting structures in a sliding mode, and through a limiting structure on the connecting structure, through dynamic matching of a limiting ball and a clamping groove in the using process and in combination with elastic deformation of a limiting spring, the air inlet connecting structure is matched with the pressurizing structure. Automatic locking of the storage structure and the connecting structure is achieved, then installation can be completed only by rotating the storage box, complex tools or additional fixing pieces are not needed, the operation difficulty is lowered, and the requirement for frequent medicament replacement in the nursing scene of old people is particularly met.

The embodiment of the invention discloses a power conversion device and an uninterruptible power supply, relates to the technical field of power electronics, and solves the problems of how to shorten the action time of a relay, simple structure and low cost. The power conversion device comprises an inverter circuit, a switch, a first resistor, a first switching tube, a second switching tube and an auxiliary power supply. The positive input end of the inverter circuit is connected with the positive direct-current bus, and the negative input end of the inverter circuit is connected with the negative direct-current bus. The switch comprises a coil, a moving contact and a static contact, the moving contact and the static contact are connected with the output end of the inverter circuit and the output end of the power conversion device respectively, and the coil is used for driving the moving contact and the static contact to act mutually. The first end of the first switch tube is connected with the grounding end. The coil and the first resistor are connected in series between the output end of the auxiliary power supply and the second end of the first switch tube. The second switch tube is connected in parallel with the first resistor.

The application discloses a universal joint ball pair locking mechanism and medical equipment, and relates to the field of medical equipment. The universal joint ball pair locking mechanism comprises a ball joint and a locking assembly. The ball joint comprises an inner ball head and an outer ball body which are hingedly connected with each other. The locking assembly comprises a first engaging member, a second engaging member and an unlocking driving member. The application realizes rigid locking through the engagement of the first engaging member and the second engaging member. The locking design is not affected by factors such as changes in the friction coefficient and wear, and can stably maintain the relative angle of the inner ball head and the outer ball body, thereby avoiding adverse loosening caused by friction failure and improving the stability of the locking strength. The locking assembly has two states of locking and unlocking. When unlocked, the inner ball head and the outer ball body can be universally adjusted, thereby meeting the requirement of flexible equipment to reach a target position and angle. When locked, stable support is provided through rigid engagement, and the use requirements of flexible adjustment and reliable locking are considered, so that the application is well applicable to application occasions of the stability of equipment operation.

The invention relates to a rotary screen pressure former capable of automatically adjusting the opening degree of a throat and an automatic adjusting method of the opening degree of the throat. The forming device comprises a lower lip plate, an upper lip plate capable of swinging, a balance mechanism and an automatic adjusting system. The automatic adjusting system obtains technological parameters such as the inlet flow of a pulp distributor and the running speed of a mesh cage through a parameter obtaining module, and the target throat opening degree is obtained through feedforward calculation of a control module; meanwhile, the actual throat opening degree is obtained through the displacement detection device. And the control module compares the difference value and outputs a control instruction to control the execution mechanism to adjust the stress state or position of the balance mechanism so as to drive the upper lip plate to swing. Through combination of feedforward calculation and closed-loop control, the hysteresis quality of traditional passive compensation is overcome, and active and accurate adjustment of the throat opening degree is achieved so as to guarantee constant slurry discharging; and meanwhile, decoupling of opening positioning and pressure pulse buffering is achieved through a rigid-flexible combined structure, and mechanical abrasion is effectively reduced.

The utility model relates to the technical field of cord thread rubber coating, and discloses a coiling retaining device which comprises a fixing frame and further comprises vertical plates in bolted connection with the two sides of the top of the fixing frame, the tops of the vertical plates are in bolted connection with a transverse plate, the top of the transverse plate is fixedly connected with an air cylinder, and the output end of the air cylinder extends to the position below the transverse plate and is fixedly provided with a connecting plate. The fixing plates are connected to the left side and the right side of the inner side of the connecting plate in a bolted mode, a first retaining roller is arranged between the two fixing plates, movable blocks are fixedly connected to the two ends of the first retaining roller, a folding rod is fixed to the right side of the movable block on the right side, and a clamping tooth plate is fixed to the other end of the folding rod; the second retaining roller is rotationally connected between the left vertical plate and the right vertical plate; a gear is fixed on the surface of a rotating shaft on the right side of the second retaining roller; the first retaining roller can be driven to move downwards, so that the cut cord thread is clamped and prevented from retreating, and follow-up continuous operation and use are facilitated.

The utility model discloses a kind of assembling connectors, for being worn between at least two splices, assembling connector includes body, driving component, driven component and integrally-formed placeholder component, at least one face of body in the direction of insertion splice is equipped with mounting hole, at least one face of body in contact splice is equipped with window, mounting hole and the inner cavity of window intercommunication body;Driven component and placeholder component are placed in inner cavity, driving component movably connects mounting hole and drives driven component;When driven component is moved from first position to second position by driving component, driven component abuts placeholder component and generates elastic deformation, displacement and / or rotation, so that placeholder component changes from the state of being completely built-in in body to at least partially expose from window, and the exposed part of placeholder component fills the gap between assembling connector and splice.The placeholder component of the utility model is integrally-formed, greatly reduces production processing difficulty and cost.

This invention relates to the field of underground ventilation equipment technology, and discloses a mine underground ventilation and air exchange device, including a housing, a fan installed inside the housing, and an air guide pipe located on one side of the housing. A connecting ring is fitted and slidably connected to the outer wall of the housing near the end of the air guide pipe. One side of the connecting ring is fixedly connected to one end of the air guide pipe. A water spray ring is slidably connected to the inner wall of the air guide pipe near the connecting ring. A water inlet pipe is fixedly connected to the inner side of the water spray ring. Several nozzles facing the inner wall of the water spray ring are fixedly connected to the side of the water spray ring away from the connecting ring. This mine underground ventilation and air exchange device, by setting a traction rope with a length not less than the total length of the air guide pipe at the end of the connecting column between the fixed fan and the movable fan, pulls the water spray ring along the entire length of the air guide pipe through an external traction device. The nozzles spray synchronously onto the inner wall of the air guide pipe, and with the assistance of wiping cotton, the accumulated dust on the inner wall can be thoroughly removed without the need for manual entry into the pipe, thus improving cleaning safety.