108results about How to "Prevent reverse installation" patented technology

The invention discloses a mute motor inner cover, a mute motor and a dust collector provided with a mute motor. The mute motor inner cover for the dust collector comprises an inner housing defining an accommodating cavity for accommodating a motor body and an outer housing which is an integrally formed part, wherein a first outlet is formed in the side wall of the inner housing, the inner housing is detachably arranged in the outer housing, an airflow channel is defined between the outer housing and the inner housing, a second air outlet is formed in the outer housing, the first air outlet and the second air outlet are respectively communicated with the airflow channel, and a mute cavity is defined in the outer housing, is located between the first air outlet and the second air outlet and is communicated with the first air outlet. According to the mute motor inner cover for the dust collector, the number of parts is decreased, convenience is brought to mounting and dismounting, damage is not likely to occur, and the problem of inverse mounting can be also prevented. In addition, the mute cavity can be defined in the outer housing, and the mute effect of the motor inner cover for the dust collector can be further improved.

The invention discloses a full-grouting sleeve for connection of construction reinforcing steel bars, and belongs to the technical field of building projects. A reinforcing steel bar axial-limiting guide stop dog is arranged on the inner wall in the middle of a sleeve main body; guide slopes are arranged between the stop dog and the inner wall of the sleeve main body; a positioning bolt is arranged on the sleeve main body at the prefabricated end; the reinforcing steel bar at the prefabricated end is axially and radially fixed through the positioning bolt; the sleeve main body is molded by one-step casting of spheroidal graphite cast iron, so that the production cost is low; the outer surface of the sleeve main body serves as a roughened surface, so as to ensure the anchoring force between the grouting sleeve and the concrete; a plurality of convex hooping ribs are arranged on the inner wall of the grouting sleeve; an identification gap is formed in the port face of the sleeve main body at the field poured end, so as to prevent the situation that the grouting sleeve is installed reversely; a seal ring is arranged inside the port of the sleeve main body at the prefabricated end. When the grouting sleeve disclosed by the invention is in axial butt joint with the reinforcing steel bar, the precise axial control can be automatically realized, and the radial positioning can be automatically realized, so as to ensure the positioning accuracy between the reinforcing steel bar and the grouting sleeve, and meet the requirements on building construction quality.

The invention relates to an air purifier, which comprises a purifying main body, one side of the purifying main body is provided with an air inlet, a filter and a fan are arranged sequentially along an air flow path in the purifying main body, and the entire purifying main body is covered by the filter; the purifying main body is provided with an air passage at a position corresponding to the fan; the air passage is communicated with an air outlet formed in one side of the purifying main body; a flow guide plate for air flow is arranged at one side of the fan, the flow guide plate is divided by ribs, and the ribs are in contact with the filter. The air purifier is small in size and lightweight, and therefore is convenient to carry, the air supply and filtering power is high, active air supply is adopted, breathing resistance is low, and the air purifier is comfortable.

The invention discloses a rotor vane locking structure, and relates to the technical field of engines. The rotor vane locking structure comprises rotor vanes, a drum and a locking block, wherein the rotor vanes are mounted in mortises in the drum through tenons, and are locked in the circumferential direction of the drum through the locking block; a first profile is arranged at one end of the locking block; a second profile is arranged at the other end, opposite to the first profile, of the locking block; half-profile grooves are formed in margin plates of the rotor vanes; the half-profile grooves at the two adjacent rotor vanes form an integral groove fit with the first profile; a clamping groove fit with the second profile is formed in the drum; and at least one of the first profile and the second profile is dissymmetric. The rotor vane locking structure has the benefits that the rotor vane locking structure can prevent the locking block from being mounted reversely at the axial front and back of the drum through the first profile or the second profile.

The invention relates to an intelligent optical fiber connector. The intelligent optical fiber connector comprises an SC shell, a cable protection casing pipe, a connector hood, an upper fastening cap and a lower fastening cap, wherein the SC shell is connected with one end of the cable protection casing pipe in a clamped mode, the connector hood is connected with the SC shell through a U-shaped clamping base in a clamped mode, the upper fastening cap and the lower fastening cap are connected with the connector hood in a clamped mode through clamping holes of the upper fastening cap and clamping holes of the lower fastening cap, anti-looseness meshing structures are arranged between the SC shell and the U-shaped clamping base and between the SC shell and the lower fastening cap, and an anti-misassembly and anti-forward-creep structure is arranged between the U-shaped clamping base and the SC shell. According to the optical fiber connector, a certain anti-looseness and anti-pull-off effect can be achieved between an intelligent device and the SC shell, and the intelligent device can be prevented from being assembled reversely and will not creep forwards after being assembled.

The invention discloses an LED (Light Emitting Diode) desk lamp. The LED desk lamp comprises a base with a plug, a bracket and a lamp holder, wherein the base is connected with one end of the bracket in a detachable way, the lamp holder is connected with the other end of the bracket by a hinge, a clamp groove is formed in the edge part of the upper surface of the base, a positive pole spring plate and a negative pole spring plate which are electrically connected with the plug are respectively arranged on the two inner side walls of the clamp groove, a positive pole contact and a negative pole contact which are electrically connected with the lamp holder are respectively arranged in the corresponding positions of the end part of the bracket, a battery is built in the bracket, the built-in lamp holder which is electrically connected with the battery is arranged at the hinged end part of the bracket, a switch for controlling the built-in lamp holder is arranged on the side wall of the bracket, and the bracket can be disassembled and used as a torch.

The invention relates to a screening device. The screening device comprises a discharge unit, a turnover unit and a pickup unit, and further comprises a recognition unit. The obverse side and the reverse side of a material can be accurately judged through the recognition unit, the recognition speed is high, recognition is precise, and thus the problem of low artificial recognition process efficiency is solved. In the artificial recognition process, problems such as visual fatigue and wrong judgment are prone to occurring, obverse side and the reverse side recognition errors generated by artificial recognition can be effectively avoided through the recognition unit, and the percent of pass of products in the subsequent product assembly process is further guaranteed.

The invention discloses a support structure of a microwave oven grill, which comprises a microwave oven cooking chamber side wall and a grill support; the grill support is provided with a support body; one side surface of the support body is provided with an insertion fixing part to be inserted into an installation hole arranged on the microwave oven cooking chamber side wall, and the other side surface thereof is provided with a support hook for supporting the grill; the insertion fixing part is provided with an insertion guiding lug; and the installation hole on the microwave oven cooking chamber side wall is provided with a guiding lug insertion slot which corresponds to the insertion guiding lug on the insertion fixing part. The insertion guiding lug is arranged on the upper end surface or the lower end surface of the insertion fixing part. The left side and the right side of the insertion fixing parts are symmetrically provided with limit pieces. The support structure of the microwave oven grill only needs to be provided with a location guiding structure for guiding the installation on the prior grill support, thereby totally preventing the reverse installation problem of the grill support, and improving the working efficiency.

The invention discloses an automatic insertion and positioning device for injection-molded embedded hardware. The automatic insertion and positioning device comprises a vibrating disk, a guide chute body, a workbench, hardware fixing devices, a rotary table, clamps and hardware grabbing and transferring mechanisms, wherein a mobile carrier is arranged on the workbench, and the hardware fixing devices are arranged on the mobile carrier at intervals; the guide chute body is arranged at a discharging port of the vibrating disk and points to the mobile carrier; the hardware grabbing and transferring mechanisms are arranged on one side or two sides of the mobile carrier and the guide chute body and transfer hardware on the guide chute body onto the hardware fixing devices; a plurality of clampfixing seats are arranged on the rotary table in a mode of a ring array; and the clamps are respectively arranged on the clamp fixing seats. By the way, the automatic insertion and positioning devicefor the injection-molded embedded hardware avoids the problem that the hardware is installed backwards, and improves the working efficiency of the hardware being inserted into the clamps.

The invention discloses an assembling mistake-proofing device for external spherical heads of a steering machine assembly. The assembling mistake-proofing device comprises a bar-type supporting plate and two clamping blocks which are respectively arranged at two ends of the bar-type supporting plate, wherein a clamping slot matched with a left external spherical head of the steering machine assembly in shape is formed in one clamping block; a clamping slot matched with a right external spherical head of the steering machine assembly in the shape is formed in the other clamping block. Due to the adoption of the structure and a method, the assembling mistake-proofing device has the advantages that the left external spherical head and the right external spherical head of the steering machine assembly are respectively assembled in the clamping slots of the two clamping blocks; if the shapes of the external spherical heads are matched with each other, the external spherical heads are rightly assembled; if the shapes of the external spherical heads are unmatched with each other, the external spherical heads are assembled by mistake, and the left external spherical head and the right external spherical head of the steering machine assembly are reversely assembled on the steering machine assembly, so that the reverse assembling of the left external spherical head and the right external spherical head during assembling can be avoided.

The invention discloses a rotor punching sheet of a high-speed permanent magnet motor. The rotor punching sheet comprises punching sheet inner slots (1), punching sheet combined holes (2), lightening holes (3) and a rotor shaft hole (4), wherein the punching sheet inner slots (1) are distributed on an outer circumferential surface of the punching sheet, the lightening holes (3) are arranged around the rotor shaft hole (4) in a surrounding manner, the punching sheet combined holes (2) are arranged among the lightening holes (3), and the rotor shaft hole (4) is arranged at the center of the punching sheet. According to the rotor punching sheet of the high-speed permanent magnet motor disclosed by the invention, a permanent magnet block is embedded in the punching sheet inner slot so that the permanent magnet block can be prevented from falling off during a high-speed operation; due to an integrated punching sheet structure, a magnetic flux forms closed circulation so as to prevent the permanent magnet block from loss of excitation, and the service life of the permanent magnet motor is prolonged; and reverse installation of the punching sheet is avoided by utilizing asymmetrical webs in the punching sheet.

The invention discloses a using method of an earphone press-fitting jig. The using method of the earphone press-fitting jig comprises step 1: pulling open a manual direct pushing clamp of an earphone outer cover pressing-in mechanism; step 2: installing an earphone body into an earphone body die holder and then assembling an earphone outer cover through the mistake-proof groove of the earphone body die holder; step 3: downwards pulling the handle of the manual direct pushing clamp of the earphone outer cover pressing-in mechanism, and downwards pressing the earphone outer cover through an upper pressing plate to press-fit the earphone outer cover with the earphone body; step 4: releasing the manual direct pushing clamp of the earphone outer cover pressing-in mechanism and taking out the press-fit earphone body. By adopting the method, the earphone outer cover and the earphone body can be accurately positioned and quickly bonded, a worker is effectively prevented from installing the earphone outer cover in an opposite direction or at an incorrect position, the production efficiency of the worker is improved and the labor intensity of the worker is reduced.

The invention belongs to the technical field of decorative building materials, particularly relates to a fabricated partition wall steel keel system, and meanwhile further provides a fabricating method of a fabricated partition wall steel keel. The designed partition wall steel keel system is overall of a steel structure, a steel keel profile is a cold-bent closed profile, a hanging plate verticalhole, a ceiling and floor connecting piece hole, a transverse keel groove and the like are prefabricated, the size precision error is less than or equal to 0.5 mm, and the precision of an aluminum profile and the strength of the keel profile are integrated. According to the fabricated partition wall steel keel system and the fabricating method of the fabricated partition wall steel keel, the problems that the precision of a traditional steel bent profile is inaccurate, batches are inconsistent, and the strength of the aluminum extruded profile is low are solved, and the beneficial technical effects of factory prefabrication, on-site fabricating, fast and convenient mounting, high precision, high strength and reutilizing are achieved.

The invention provides a dust collector filter element neglected loading detection mechanism. The mechanism comprises a front filter element and a rear filter element, wherein the rear filter elementand the front filter element abut against each other after being correctly installed, and the rear filter element and the front filter element can be detached separately in the detaching process; a neglected loading prevention assembly is located at the top of the rear filter element, and after the rear filter element and the front filter element are both correctly installed, the rear filter element and the front filter element jointly abut against the neglected loading prevention assembly and trigger the neglected loading prevention assembly; the front filter element and the rear filter element are separately assembled, and the front filter element or the rear filter element is convenient to replace due to the non-integrated structure; the neglected loading prevention assembly is arrangedat the top of the rear filter element, so that neglected loading of the front filter element and/or the rear filter element can be detected, and when one of the front filter element and the rear filter element is neglected to be loaded, neglected loading of any one of the front filter element and the rear filter element can be detected by using only one neglected loading prevention assembly; andstructures of the front filter element and the rear filter element are improved, so reverse installation of the front filter element and the rear filter element can be effectively avoided. The invention further provides a dust collector.