8 results about "Variable ratio" patented technology

The application provides a creep test device for a steel ring reinforced shield tunnel lining interface, characterized in that the device comprises a support fixing mechanism, a constant ratio loading mechanism, a variable ratio loading mechanism and a test piece; the constant ratio loading mechanism and the variable ratio loading mechanism are arranged on the support fixing mechanism, the constant ratio loading mechanism and the variable ratio loading mechanism form a folded series two-stage lever mechanism, and the purpose of applying a load to the test piece is achieved by adjusting the counterweight and the length of the power arm on the variable ratio loading mechanism. The application also provides a combination device of the above device, and the creep test of the test piece under a pull-shear coupling condition can be realized by the combination of the two devices. The creep test of the steel ring reinforced shield tunnel lining interface by using the device has good load holding performance, can flexibly simulate complex pull-shear coupling conditions, and improves the test efficiency and reduces the test cost.

The utility model discloses a double servo variable ratio metering system relates to two-component glue delivery system technical field, including lower frame and metering cylinder, the upper surface of lower frame is provided with the upper frame, the output end of servo motor is connected with the screw rod cylinder, the one end of metering cylinder close to the support plate passes through the piston rod, and the piston rod is connected with the screw rod cylinder. And a screw rod shaft is arranged in the screw rod cylinder body. According to the double-servo variable-ratio metering system, in order to set that two-component glue is strictly output according to different proportions and meanwhile ensure that the glue is output in a precise quantity guaranteeing state, two independent movement mechanisms are adopted to execute and guarantee the whole operation system; two sets of servo motors drive a lead screw shaft to rotate, so that a piston rod does piston motion in two metering cylinder bodies, two sets of glue with different components flow from the interiors of the two metering cylinder bodies respectively, and the motion line spacing of the piston rod is accurately controlled by limiting the distance between a sliding block and the end faces of the metering cylinder bodies. Therefore, the output quantity of the two groups of glue is accurately controlled.

According to particular embodiments, a door operating system comprises: a rotating handle removably coupled to a first gear; the first gear coupled to a second gear; the second gear removably coupled to a worm gear; and the worm gear coupled to a rotating plate. Rotation of the handle rotates the first gear which rotates the second gear which rotates the worm gear which rotates the rotating plate to cause the door to open or close. The first gear is swappable with the second gear to modify a gear ratio of the door operating system.

There is provided a winding assembly (16), and a pallet lid (1) comprising the winding assembly (16). The winding assembly (16) comprises a rotatable tensioner (37) configured to receive a tensioning

The utility model relates to mechanical seal technical field, and disclose variable ratio pressure's mechanical seal, including pivot and main static ring, the pivot outside fixed mounting has the shaft sleeve, the main static ring one side is provided with the driving ring, the shaft sleeve side fixed mounting has spring seat, the spring seat inside is provided with screw, spring no.

The invention relates to a method for compensating a calibration error with an axle geometry table during a steering system position calibration of a steering system (10) by determining a rack position of a rack (20) with a variable ratio by comparing the initial steering angle adjusted by a correction value (26) with an axle geometry table stored in the steering system (10) taking into account a previously determined symmetry offset (28) of the rack (20).

This invention provides a method and system for detecting machining errors in variable ratio rack-and-gear sector pairs, relating to the field of transmission mechanism design. Addressing the difficulty of accurately detecting errors in variable ratio rack-and-gear sector pairs using existing methods, this invention constructs a comprehensive virtual sample library by acquiring dynamic characteristic data under multiple known errors and operating conditions. It utilizes a two-dimensional comprehensive weight index to reconstruct and optimize parameters, and establishes a nonlinear mapping model between error, operating condition, and response based on a neural network. High-fidelity simulation data fills the gap in scarce fault samples. Through the inverse calculation logic of the neural network model, the macroscopic operating conditions and response signals sensed by sensors can be decoupled into specific microscopic error types. This overcomes the nonlinear time-varying interference of variable ratio structures without the need for expensive destructive testing, achieving low-cost error detection of variable ratio rack-and-gear sector pairs.