11results about How to "Assembly accuracy is low" patented technology

This invention relates to the field of construction monitoring equipment technology, specifically a settlement observation instrument for roadbed safety construction. The instrument includes a string strain gauge and a differential pressure static level. The differential pressure static level has connecting pipes on both its air and water inlets, which are fixed to a conduit support. The signal line of the string strain gauge is fixed within the conduit support. The two ends of the string strain gauge are fixed to a fixed end and a floating end, respectively. The floating end includes a movable end seat fixedly fitted onto one end of the string strain gauge. This invention allows adjustment of the floating end's height position through a sliding fit between the upper ball joint and the rotating sleeve. The orientation and tilt angle of the floating end can be freely adjusted through the universal joint between the upper ball joint and the upper spherical shell, and between the lower ball joint and the lower spherical shell. During on-site installation, adjusting the floating end position ensures that the string strain gauge's measuring rod remains in a natural, unloaded, and unstressed state, thus avoiding measurement errors introduced by initial stress and effectively improving the accuracy and stability of roadbed settlement and tilt monitoring.

A fixing clamp (2) for discharge outlet of intermediate bulk containers is disclosed. The discharge outlet (1) comprises a flange edge (3), a discharge connecting port (5) and a discharge outlet clamping part (4). The discharge outlet clamping part (4) is a polygonal structure. The fixing clamp (2) comprises a fixing clamp body, a clamping portion (8), elastic guiding ribs (7) and anti-release portion (9). A passage for accommodating the discharge outlet clamping part (4) is formed in the middle part of the fixing clamp body. The clamping portion (8) is used for clamping the side surface of the discharge outlet clamping part (4) when the fixing clamp (2) and the discharge outlet (1) have been assembled. The elastic guiding ribs (7) will be squeezed by the side surface of the discharge outlet clamping part (4) to deform When the leading-in surfaces of the elastic guiding ribs (7) contact with the side surface of the discharge outlet clamping part (4). The elastic guiding ribs (7) restore elastically and the anti-release portion (9) are engaged with the side surface of the discharge outlet clamping part (4) to prevent the fixing clamp (2) from being separated from the discharge outlet (1) after the fixing clamp (2) and the discharge outlet (1) have been assembled. The fixing clamp (2) can be transversely pushed in to be assembled with the discharge outlet (1). The fixing clamp has low requirements for assembly accuracy, and is favorable for saving cost and increasing efficiency.

The application discloses a semiconductor wafer bin conveying system and a control method thereof, and relates to the technical field of semiconductor manufacturing automation. The system comprises a conveying unit and a material placing unit. The improvement lies in that the bottom of a wafer bin body is provided with three positioning grooves in isosceles triangle distribution, forming a mistaken orientation prevention structure; and the transfer frame and the material placing frame are respectively provided with a first set and a second set of limiting protrusions corresponding to the positioning grooves. The two sets of protrusions are configured to be selectively and sequentially clamped with the positioning grooves at the bottom of the same bin body during the conveying process, so that the anti-interference positioning handover from grabbing to placing is realized. The application eliminates the positioning collision risk between the conveying mechanism and the fixed station from the mechanical structure, and ensures the uniqueness of the direction of the wafer bin through the asymmetric geometric design. Meanwhile, the material placing frame can be integrated with elastic air supply and pressure sensing detection functions, realizing higher automation and reliability.

This utility model discloses a push-pull magnetic control handle for a teacup, including a handle body, which includes a handle body and a base disposed on the front side of the handle body. The base has a movable cavity, within which a strong magnet is movably disposed vertically. The strong magnet controls the valve of the magnetized body in the teacup. An actuating element is movably disposed within the movable cavity, and the strong magnet is mounted on the actuating element so that the actuating element drives the strong magnet to move vertically closer to or away from the magnetized body. Driving parts are provided on both sides of the actuating element, extending outside the base. When an external force pushes the driving parts upwards or downwards, the actuating element drives the strong magnet to move vertically, bringing it closer to or away from the magnetized body inside the teacup, thereby opening or closing the valve inside the teacup. This structure is not only convenient for manual operation but also simple in design, requires low assembly precision, and helps reduce production costs.

This invention relates to the field of track conveying technology and discloses a track conveying module and sorting equipment, comprising: a track body extending along a first direction; a drive assembly including a drive mechanism, an open synchronous belt, and two bearing shafts with toothed grooves on their outer circumferences, the two bearing shafts being respectively disposed at both ends of the track body along the first direction, one of the bearing shafts being connected to the drive end of the drive mechanism for driven rotation, the two ends of the open synchronous belt respectively bypassing the two bearing shafts and engaging with the toothed grooves; and a sliding assembly slidably connected to the track body for carrying the items to be conveyed, the two ends of the open synchronous belt bypassing the two bearing shafts being fixedly connected to the sliding assembly. This track conveying module and sorting equipment can meet the requirements of long-stroke conveying while avoiding sudden jamming or failure of transmission components, effectively improving service life and operational reliability under conditions of relatively high dust levels and relatively long strokes.

This invention relates to an electronic expansion valve, comprising a drive assembly, a screw, a valve needle, a valve seat, a bearing, and a valve needle spring. The valve seat has a fluid passage. The drive assembly drives the screw to rotate and move axially. The valve needle has an axial mounting hole inside, and its upper part has a bearing cavity to accommodate the bearing. The lower end of the screw extends into the axial mounting hole and is rotatably connected to the bearing, allowing for axial sliding. A screw retaining ring is provided at its lower end, and a screw annular protrusion is provided on its outer periphery. The valve needle spring is sleeved on the screw and confined between the screw annular protrusion and the upper end face of the valve needle. Downward movement of the screw compresses the valve needle spring through the screw annular protrusion, pushing the valve needle downward. Upward movement of the screw pushes the valve needle upward through the screw retaining ring against the bearing, thereby achieving stable axial movement of the valve needle to precisely control the opening and closing of the fluid passage. This structure achieves pure axial transmission through the bearing, effectively preventing the valve needle from rotating and vibrating with the screw. The compact layout of the valve needle spring significantly shortens the axial dimension of the valve body, improving transmission reliability and service life.

This utility model relates to the field of sensor technology, providing a pressure sensor structure and an electronic pressure pen. The pressure sensor structure includes an elastic body and a flexible circuit board. The elastic body includes an elastic main body and a contact structure for contacting a pressure-applying structure of an external device. The flexible circuit board is located on the side of the elastic main body away from the contact structure and is electrically connected to the main control circuit board of the external device. The pressure sensor structure provided by this application has a simple overall structure. Furthermore, by adding the contact structure, the assembly precision between the elastic main body and the external pressure-applying structure is reduced. The force applied by the pressure-applying structure can be transmitted to the elastic main body more quickly, and the deformation of the elastic main body under force is more pronounced, which also improves the pressure sensitivity accuracy of the pressure sensor structure to a certain extent.

A frameless car door C-pillar sealing strip upper corner, C-pillar sealing strip assembly, and vehicle are disclosed, relating to the field of vehicle body structure technology. The C-pillar sealing strip upper corner includes: a corner body having a top surface corresponding to the roof direction and an outer surface corresponding to the side of the vehicle; a water-blocking lip protruding from the inner, rear, and outer sides of the top surface to block water from flowing towards the rear and roof direction on the top surface; and a water guide channel disposed on the top surface to guide the water blocked by the water-blocking lip from the top surface to the outer surface. When water flows in from the gap between the side trim strip and the rear quarter window trim strip, the water is blocked by the water-blocking lip on the top surface of the corner body, preventing it from flowing towards the rear and roof direction. The blocked water is then guided by the water guide channel to the drainage channel inlet of the C-pillar sealing strip and discharged outside the vehicle along the drainage channel path. By improving the sealing structure at the water inlet and optimizing the water flow path, the water leakage problem of the C-pillar sealing strip assembly is solved at its root.

This invention discloses a high-power-density planetary traction drive. A loading wedge space and a balancing space are formed on both sides of the radial distance circumference between the planetary rollers and the outer ring. A loading roller is located within the wedge-shaped loading space and rolls in contact with the planetary rollers and the outer ring. A balancing idler wheel is provided in the balancing space. The planetary rollers, balancing idler wheel, and loading rollers are all floating, with the loading rollers abutting against the planetary carrier. The torque or counter-torque transmitted by this invention can directly act on the loading rollers, achieving adaptive loading and making the loading process faster and more flexible. Optimization of the load in the contact area also improves the service life of the traction drive. The superposition of contact forces generates a larger clamping force, thereby ensuring sufficient tangential force in each contact area to transmit power. Furthermore, the planetary traction drive provided by this invention can achieve high-load transmission under the load-sharing effect of multiple rollers. The zero-spin design based on cylindrical rollers also minimizes power loss, resulting in high power density and improved transmission accuracy and efficiency.

This invention discloses an adjustable wrench that achieves rapid opening and closing through nut rotation, relating to the field of manual hardware tools. It includes a wrench body, a movable jaw, an adjusting nut, a stop block, a compression spring, a pin, and a detachment pin. The wrench body has a fixed jaw and a sliding groove. The movable jaw is slidably fitted into the sliding groove, and its root shaft at the bottom end has a follow-up adjusting tooth and a guide slope. The adjusting nut is rotatably mounted on the wrench body via a pin and has a guide notch adapted to the guide slope, as well as anti-slip patterns that mesh with the follow-up adjusting tooth. The compression spring and the stop block are assembled in the movable groove of the wrench body, forming a constantly engaged locking mechanism for the adjusting nut. The detachment pin cooperates with the limiting groove of the movable jaw to form a full-stroke anti-detachment protection. This invention achieves a wide range of opening range adjustment within seconds through nut rotation, while also enabling precise micro-adjustment, and combines the advantages of stable locking, anti-detachment safety, and a simplified structure.

The utility model discloses a motor operation angle detection device belongs to motor control and sensor technical field, this device realizes through following technical scheme: the same multi -pole magnetic ring of motor pole pair number is outside in motor rotating shaft terminal, and magnetic ring is along the circumferential direction and alternately arranges N north pole and N south pole, the lateral installation mode is adopted to the encoder, and its induction surface is perpendicular to rotating shaft axis, is used for detecting magnetic ring magnetic field and exports rotor angle signal. The encoder supports PWM or ABZ incremental encoding signal or absolute value SSI / SPI output, improves every rotation signal period number through multi -pole magnetic ring design, realizes high resolution angle detection. This scheme is through the magnetic ring outside isolation motor internal electromagnetic interference, combines lateral installation and reduces assembly accuracy requirement, has improved the precision of angle detection, anti -interference ability and installation convenience obviously, is applicable to servo motor, robot joint etc. High -performance control scene.