42results about How to "Simple locking method" patented technology

The invention discloses a CPT atomic frequency standard laser frequency modulation index locking device and method. The power of a microwave signal superposed on VCSEL drive current is modulated; simultaneously, synchronous phase-discrimination of a light inspection signal is carried out, so that a signal that the extreme value of a Doppler absorption line is changed with the modulation index of a frequency modulation laser is obtained; furthermore, the signal is converted into a negative feedback correction signal; and the microwave power is controlled by utilization of obtained negative feedback of the correction signal, so that the modulation index of the frequency modulation laser is stabilized. The device is simple in structure; a laser frequency modulation index locking function can be realized by increasing a few components in the existing CPT atomic frequency standard device; the CPT spectral line signal obtained by the device is the strongest after locking; furthermore, change of the CPT atomic frequency standard performance due to the factors, such as random temperature change and aging of a microwave device, can be reduced; the CPT atomic frequency standard performance can be improved; and the CPT atomic frequency standard laser frequency modulation index locking device and method disclosed by the invention are suitable for small CPT atomic frequency standards.

The invention provides an unmanned aerial vehicle. According to the unmanned aerial vehicle, the problems that according to an existing unmanned aerial vehicle achieving unfolding and folding of vehicle arms, the structure is complex, the occupied space is large, and the size of the unmanned aerial vehicle is increased are solved. The unmanned aerial vehicle comprises a vehicle body and a plurality of vehicle arms. A plurality of supporting seats the same as the vehicle arms in number are arranged on the vehicle body. Limiting bumps are arranged on the supporting seats. Fixed locking parts and moving locking mechanisms are arranged at the hinging ends of the vehicle arms. According to the unmanned aerial vehicle, the limiting bumps are arranged on the supporting seats, and the fixed locking parts and the moving locking mechanisms are arranged at the hinging ends of the vehicle arms so that the unfolding locking function of the vehicle arms of the unmanned aerial vehicle can be achieved; and meanwhile, through driving mechanisms arranged on locking sliding blocks, locking of the sliding blocks can be relieved, and thus folding of the vehicle arms is achieved. The vehicle arms are attached and locked more firmly and more smoothly; the locking mode of the vehicle arms is simple and practical, the number of involved parts is relatively small, the occupied space is small, and the internal space of the unmanned aerial vehicle can be effectively saved; and assembly is convenient, the cost is low, and folding and unfolding operation is convenient and rapid.

The invention relates to a pre-tensioning method centrifugal concrete pile with steel strands. The pre-tensioning method centrifugal concrete pile comprises a hollow concrete pile body, end plates and a steel bar cage. The steel bar cage comprises main prestressing bars and stirrups, wherein the main prestressing bars are axially arranged, and the stirrups are wound around the main bars. The pre-tensioning method centrifugal concrete pile is characterized in that the main prestressing bars are the steel strands, the steel strands of at least one end of the steel bar cage are combined with extrusion anchor devices, the peripheries of the extrusion anchor devices are sleeved with connecting sleeves, the connecting sleeves are provided with stepped through holes, the connecting sleeves are provided with threads for connection, a plurality of connecting counter holes are formed in the end plates, a threaded connecting piece is arranged inside each connecting counter hole, the end plates are connected with the threads for connection on the connecting sleeves through the threaded connecting pieces, and the end plates are further provided with a plurality of threaded connecting holes used for connection. According to the pre-tensioning method centrifugal concrete pile with the steel strands, in the pile manufacturing process, the steel strands combined with the extrusion anchor devices can be fixedly connected with the end plates through the connecting sleeves, tensioning plates of the end plates are fixedly connected in a threaded mode, the steel strands used as the main bars in the steel bar cage are tensioned and applied, and the anti-bending, anti-shearing and anti-tensioning performance is greatly improved. The invention further relates to a manufacturing method of the pre-tensioning method centrifugal concrete pile.

The invention relates to an electric power fitting line stay wire fixing wire clamp. The clamp comprises a first fixing block, a second fixing block, a limiting rod, a connecting rod, a locking mechanism and an air pressure mechanism; the first fixing block and the second fixing block are two components of the same structure. Locking mechanisms are arranged at the tops of the first fixing block and the second fixing block; air pressure mechanism mechanisms are mounted on the two side walls of the first fixing block and the second fixing block; the first fixing block and the second fixing blockare connected and fixed through a limiting rod and a connecting rod. A semicircular fixing groove is formed in one side of the first fixing block. The firmness of electric wire fixing is effectivelyimproved in a multi-stage fixing mode, meanwhile, the electric wire fixing device is suitable for fixing electric wires with different spacing requirements, and the practicability is higher. The electric wire fixing device has the advantages that the electric wire fixing device can be used for fixing the electric wires with different spacing requirements.

The invention discloses a built-in handle. The built-in handle comprises a handle shell and a handle lock cylinder located in the handle shell, wherein a dustproof structure is arranged at a position corresponding to an outer lock hole on the handle shell; the handle lock cylinder is locked in the handle shell via an inclined block. According to the built-in handle, the inclined block is used for locking the handle lock cylinder and the handle shell; the locking manner is more simple, efficient and reliable; the safety of the handle lock cylinder is improved; secondly, the dustproof structure protects the lock hole in the lock cylinder from being damage by dust or other foreign matters, so that the usage performance of the handle lock cylinder is ensured, and the service life of the handle lock cylinder is prolonged; furthermore, the handle shell is formed by welding two symmetrical half shells; the welding process is reliable, so that the performance of the handle shell is excellent; the large-scale production and the streamlined operation are facilitated; the service life of the product is prolonged; the production cost is reduced.

The invention discloses a bicycle brake crank which comprises a base frame and a handle. The handle comprises a handle body. One side of the upper end of the handle body extends to form an arc-shaped handheld portion. A brake cable installation groove is formed in the upper end of the handle body. A through hole is formed in the lower end of the handle body. A handle installation groove is formed in one side of the upper end of the base frame. The handle is riveted into the handle installation groove through a rivet penetrating through the through hole. The other end of the upper end of the base frame is connected with a fine adjusting nut. A pipe hole is formed in the lower end of the base frame. An annular groove coaxial with the pipe hole is formed in the side face of the lower end of the base frame. A locking circular ring is arranged in the annular groove. The upper end of the locking circular ring is provided with an opening and extends upwards to form an extension base. The extension base is located in the base frame and fixed into the base frame through a fixing screw. The bicycle brake crank has the technical advantages that the base frame and a handlebar are locked through the locking circular ring, the locking method is simple, and the locking effect is good; the locking circular ring and the base frame can be separately colored, the visual impression of the bicycle brake crank is improved, and the ornamental value is achieved.

The invention discloses a die replacing system of a large-tonnage press. The die replacing system of the large-tonnage press comprises a base, a lower die assembly and ejecting devices which are arranged on the base, a die frame arranged on the outer side of the lower die assembly, side rails arranged on the two sides of the die frame and a die replacing device used for replacing the lower die assembly; a die locking mechanism is arranged between the lower die assembly and the die frame and used for locking and unlocking the lower die assembly and the die frame; locking mechanisms are arrangedbetween the die frame and the side rails and used for locking or unlocking the die frame and the side rails; the ejecting devices are connected with the side rails and used for driving the die frameto float; and rolling assemblies and guiding assemblies are arranged on the side rails. According to the die replacing system of the large-tonnage press, quick die replacing can be achieved, and the die replacing safety and reliability are improved.

The invention discloses a porous fluid connector. The porous fluid connector comprises a male end connector and a female end connector. The male end connector comprises a porous connection male end shell, a male end porous sealing body is arranged in the porous connection male end shell in a sleeved mode, the male end porous sealing body is internally provided with a plurality of male end dense pore channels. A male end porous baffle is arranged at one end of the male end porous sealing body, connecting pins are arranged at the ends, at which the male end porous baffle is located, of the maleend dense hole channels in an inserting mode, and male end capillary connecting pins are arranged at the other ends of the male end dense pore channels in an inserting mode. The female end connector includes a porous connection female end shell, a female end porous sealing body is arranged in the porous connection female end shell in a sleeved mode, and the female end porous sealing body is internally provided with a plurality of female end dense pore channels. A female end porous baffle is arranged at one end of the female end porous sealing body, and female end capillary connecting pins arearranged at the other end of the female end porous sealing body in an inserting mode. The porous fluid connector is simple in structure and locking mode, convenient to use for rapid testing, small insize, light in weight and convenient to operate.

The invention belongs to the technical field of machine tool processing, in particular to a gear aligning mechanism which comprises a movable apex shell, wherein an installation cavity is formed at one end of the movable top shell, a apex shaft, wherein the apex shaft is rotationally arranged in the installation cavity, a positioning disc, wherein the positioning disc for connecting a work-piece is sleeved at one end of the apex shaft. The right side of the movable apex shell is sleeved with a dial and an indicating disc, and the indicating disc is rotationally arranged relative to the dial. An elastic limiting device is arranged between the indicating disc and the positioning disc, wherein the elastic limiting device is movably abutted against the positioning disc. A locking screw is screwed in the indicating disc, and the locking screw is used for locking the indicating disc by abutting against the outer periphery of the movable apex shell. The gear aligning mechanism has the advantages of simple structure, low cost, simple operation, adjustable bias value, high gear aligning precision, convenient maintenance and the like.

The invention provides a locking piece, a connector and a low-temperature rocket system, which are suitable for penetrating through a first piece and a second piece and have a locking state of fixing the first piece and the second piece and a separating state of unlocking the first piece and the second piece; the system further comprise a shaft sleeve structure with a built-in accommodating cavity having the end part abutted against the first piece, and a shaft core structure penetrating through the first piece and the second piece and comprising a locking sleeve, a limiting adjusting piece and an abutting piece; the limiting adjusting piece and the abutting piece are arranged on the locking sleeve, the abutting piece is arranged in a protruding mode in the circumferential direction of the locking sleeve and abuts against the second piece, and the limiting adjusting piece comprises a second elastic piece; and the limiting adjusting piece is suitable for having the locking state of being clamped with the accommodating cavity and the separation state of being separated from the accommodating cavity under the adjustment of the second elastic piece.