9 results about "Stroke ratio" patented technology

The application relates to the technical field of generator testing, in particular to a dynamic-magnetic linear generator mutual-load pneumatic coupling test method, which obtains performance parameters of a to-be-tested motor through a pneumatic coupling mode, omits an intermediate transmission mechanism, and can jointly adjust a test frequency through inflation pressure and a variable-frequency driver, can adjust the oscillation stroke ratio of two motor movers through the area ratio of coupling pistons, can truly simulate the working condition of a linear motor in a free-piston Stirling generator, and can obtain more sufficient test data; in addition, the two linear motors are arranged to form a symmetrical structure test platform, and through transformation of a driving motor and the to-be-tested motor, the test data can be compared, so that the consistency of a prototype development and production can be verified.

The application discloses a double-stroke driving chuck and relates to the technical field of driving chucks.The double-stroke driving chuck comprises a chuck body, a large disc arranged on the chuck body, a panel placed on the front side of the large disc, four air cylinders fixedly installed on the large disc, a lower rack and two guide rails fixedly installed on the upper portion of the air cylinders, the two guide rails being arranged in parallel and the lower rack being located between the two guide rails, a sliding seat placed on the upper portion of the air cylinder, an upper rack and two sliding blocks fixedly installed on the lower portion of the sliding seat, and the upper rack being located between the two sliding blocks.The principle of the gear and rack'speed multiplication mechanism' is used to make the stroke ratio of the air cylinder piston rod and the roller be 1:2, so that the double-stroke effect is achieved.The design makes the chuck have a larger clamping range for workpieces, the long air cylinder does not need to be installed on the chuck, the outer diameter of the chuck does not need to be increased, therefore, the rotational inertia of the chuck is not increased, and the rotational speed of the chuck is not affected while the clamping stroke of the workpiece is increased.

The utility model discloses a compact high-thrust high-precision large-stroke-ratio low-maintenance-cost electric cylinder which comprises an electric cylinder shell which comprises an electric cylinder shell front section, an electric cylinder shell middle section, an electric cylinder shell rear section and an electric cylinder shell tail section, the electric cylinder shell front section is provided with a deep groove ball bearing structure and a tapered roller bearing structure, and the electric cylinder shell rear section is provided with a tapered roller bearing structure; the middle section of the electric cylinder shell is provided with an RV cycloid hollow speed reducer structure, the rear section and the tail section of the electric cylinder shell are provided with frameless torque motor structures, the interior of the electric cylinder shell is telescopically connected with a ball screw structure, and the tapered roller bearing structure and the deep groove ball bearing structure are both connected with the ball screw structure; the deep groove ball bearing structure, the tapered roller bearing structure, the RV cycloid hollow speed reducer structure and the frameless torque motor structure are sequentially connected, the ball screw structure penetrates through the deep groove ball bearing structure, the tapered roller bearing structure, the RV cycloid hollow speed reducer structure and the frameless torque motor structure, the tail section of the electric cylinder shell is connected with the hexagonal guide rod, and the hexagonal guide rod penetrates through the ball screw structure. And the RV cycloid hollow speed reducer structure is connected with an absolute value encoder.

The utility model relates to a travel switch of a contactor. The travel switch comprises a shell and a switch assembly arranged in the shell. According to the utility model, the switch assembly is integrated in the shell, so that the structural compactness is realized, the size of the whole travel switch is reduced, the travel switch is convenient to install and use in a limited space, and the travel is effectively amplified through the combined design of the conversion lever and the conversion torsion spring, so that the travel switch is more compact. According to the utility model, the external force linear motion stroke is far smaller than the conversion support stroke, and the stroke ratio is controlled within the range of not more than 1 / 2, so that the contact can make sensitive response to the tiny stroke change of the iron core, thereby improving the response speed and accuracy of the switch; and due to the design of a switching support inner clamping groove and a switching reaction spring, the stability and reliability of the contacts in the contact and separation process are ensured.

The invention discloses a double-stroke driving chuck, which relates to the technical field of driving chucks and comprises a chuck body, a large disc is arranged on the chuck body, a panel is placed on the front side of the large disc, four air cylinders are fixedly mounted on the large disc, a lower rack and two guide rails are fixedly mounted on the upper portions of the air cylinders, and the two guide rails are arranged in parallel. A sliding seat is placed on the upper portion of the air cylinder, an upper rack and two sliding blocks are fixedly installed on the lower portion of the sliding seat, and the upper rack is located between the two sliding blocks. By means of the principle of a gear and rack speed multiplication mechanism, the stroke ratio of the piston rod of the air cylinder to the idler wheel is 1: 2 so that the double stroke effect can be achieved, the clamping range of the chuck to a workpiece can be larger through the design, a long air cylinder does not need to be installed on the chuck, the outer diameter of the chuck does not need to be increased, and therefore the rotational inertia of the chuck cannot be increased; and the rotating speed of the chuck is not affected while the stroke of the clamped workpiece is increased.

The utility model discloses a novel viscous damper belongs to damper technical field. A novel viscous damper, including Y type ring and with Y type ring's stop plate, be equipped with elastic cavity between stop plate and Y type ring, make Y type ring have certain elasticity, when Y type ring, stop plate receive the pressure of silicon oil, can slide and buffer, the utility model discloses adopt the piston of high wear -resisting high elasticity POM material to make, through the excess interference design of cylinder body replacement traditional rubber O type sealing ring, realize the direct sealing between piston and cylinder body, the utility model discloses adopt novel sealing surface cover replacement traditional spring compensation structure, through the elastic deformation of sealing surface cover direct compensation the space of Y type ring displacement generation, effectively eliminated the invalid compression stroke of traditional spring compensation structure, make the effective working stroke ratio of damper higher, and the response speed is faster.

The embodiment of the invention provides a detection method and system for operating performance of an engineering vehicle and a storage medium. The engineering vehicle comprises an operation handle, a rotary table and a main pump, and the detection method comprises the steps that under the condition that the engineering vehicle is in a no-load state, the handle opening degree of the operation handle is controlled to be gradually increased at a first speed till the handle opening degree reaches the maximum opening degree; in the process that the opening degree of the handle is increased to the maximum opening degree, the first pressure, the second pressure and the third pressure of the main pump are determined, the first pressure is the pressure obtained after the pressure of the main pump changes for the first time, and the second pressure is the pressure obtained after the rotation angle of the rotary table changes for the first time; the third pressure is the pressure of the main pump when the opening degree of the handle reaches the maximum opening degree; determining a handle idle stroke ratio calibration value of the operating handle according to the first pressure, the second pressure and the third pressure; and under the condition that the handle idle stroke ratio calibration value is within the first preset interval range, determining that the control precision of the operation handle is qualified.

The utility model discloses a phase-to-phase spacer opening and closing hook type hoisting automatic tightening mechanism which comprises a phase-to-phase spacer, anti-slip rings are symmetrically fixed on the outer wall of the phase-to-phase spacer, the two anti-slip rings are respectively connected with a control steering engine through ropes, hooks are respectively fixed at the left end and the right end of the phase-to-phase spacer, and symmetrical clamping blocks are respectively arranged at the lower ends of the hooks. Electric push rods connected with the clamping blocks are arranged at the opposite ends of the two hooks correspondingly and fixed to the hooks, each electric push rod comprises a front plate and a rear plate, a motor and a fixing cylinder are fixed between the front plate and the rear plate, a gear is fixedly connected to the output end of the motor, the motor provides power to drive the gear to rotate, and meanwhile the gear is in transmission with the transmission cylinder. The transmission cylinder is in threaded connection with the fixed cylinder and the telescopic cylinder, the telescopic cylinder is in sliding connection with the fixed rod, the transmission cylinder rotates to enable the transmission cylinder and the telescopic cylinder to move synchronously, the clamping blocks are pushed to clamp a wire, the large stroke ratio is achieved, the structure is simple, reliability is high, and the size is small.

The utility model discloses a belt wheel transmission multi-section sliding door one-way linkage door opening and closing device which comprises a plurality of sliding doors, a connecting support, a driving assembly, belt wheel transmission pieces and a belt pressing plate, the number of the sliding doors is multiple, and the number of the belt wheel transmission pieces is equal to the number of the sliding doors. Each belt wheel transmission part comprises a driving belt wheel, a driven belt wheel and a belt arranged on the driving belt wheel and the driven belt wheel in a sleeving mode, the multiple driving belt wheels are located on the driving assembly and coaxially arranged, the belt pressing plate is located on the belt, and the sliding door is connected with the belt pressing plate through the connecting support. The multiple sets of belt wheel transmission parts are controlled through one set of driving assembly, and the tooth number ratio of the multiple driving belt wheels is set according to the stroke ratio of the multiple sliding doors, so that synchronous opening and closing of the multiple sliding doors are achieved, and meanwhile the installation space is saved.