38results about How to "Large displacement range" patented technology

A pedal device for an electronic percussion instrument is provided, wherein first and second detection means for detecting a rotation of a pedal by different methods are alternatively disposed in a base. The pedal has a pressing part on a lower surface side. The base includes a first portion located under the pressing part for supporting the first detection means, and a second portion located around the first portion for supporting the second detection means. The first portion supports the first detection means such that a first pressed part of the first detection means is disposed on a displacement trajectory of the pressing part that displaces with the rotation of the pedal, and the second portion disposes the second detection means such that a second pressed part of the second detection means is disposed on the displacement trajectory of the pressing part.

A vertical-motion vibration isolator utilizes negative-stiffness-producing mechanism which includes a plurality of compressed flexures, each having a particular length in the compressed direction of the flexure and being oriented in a horizontal direction, wherein the plurality of compressed flexures are positioned relative to each other such that the length of each compressed flexure substantially overlaps the length of each of the other compressed flexures. At least some of the plurality of compressed flexures can be positioned in a stacked arrangement. The arrangement of compressed flexures forming a portion of the negative-stiffness mechanism can reduce the size of the isolator without compromising vibration isolation performance.

A control system for a window shade includes a suspension member, a first and a second casing portion, a rotary drum, a torsion spring, a coupling member, a transmission axle, a central gear, a ring and planetary gears. The rotary drum is pivotally connected with the first casing portion, and is rotatable to wind and unwind the suspension member. The torsion spring can bias the rotary drum for winding the suspension member, and has a first and a second end respectively affixed with the second casing portion and a coupling member. The transmission axle is disposed through the torsion spring, and is rotationally coupled with the rotary drum and the central gear. The ring is affixed with the second casing portion and has protruding teeth. The planetary gears are pivotally supported by the coupling member, and are respectively meshed with the central gear and the teeth of the ring.

A pedal device for an electronic percussion instrument is provided, wherein first and second detection means for detecting a rotation of a pedal by different methods are alternatively disposed in a base. The pedal has a pressing part on a lower surface side. The base includes a first portion located under the pressing part for supporting the first detection means, and a second portion located around the first portion for supporting the second detection means. The first portion supports the first detection means such that a first pressed part of the first detection means is disposed on a displacement trajectory of the pressing part that displaces with the rotation of the pedal, and the second portion disposes the second detection means such that a second pressed part of the second detection means is disposed on the displacement trajectory of the pressing part.

The invention discloses a large-stroke micro-drive precise two-dimensional worktable which is mainly composed of a base, an X-direction feeding device, a Y-direction feeding device and a feeding device top worktable surface, wherein the X-direction feeding device and the Y-direction feeding device are mutually perpendicular in a two-dimensional plane, the Y-direction feeding device is arranged above the X-direction feeding device, the X-direction feeding device comprises an X-direction large-stroke feeding device and an X-direction micro-feeding device, the Y-direction feeding device comprises a Y-direction large-stroke feeding device and a Y-direction micro-feeding device, and the Y-direction large-stroke feeding device is arranged above the X-direction micro-feeding device and can move along with feeding motion of the X-direction micro-feeding device. A transition connecting plate of the base is connected with a machine tool. Due to the fact that fine precision drive of the worktable is matched with large-stroke displacement output, output force is large, the resolution ratio of displacement is high, the range of the displacement is large, and the large-stroke micro-drive precision two-dimensional worktable has a wide application prospect. Due to cooperation of a cooling system, the large-stroke micro-drive precision two-dimensional worktable avoids the machining difficulty that the feeding precision is influenced by heat generated by long-time precise machining and heating.

The invention relates to a differential pressure type wind speed transmitter. Two wind pressure adapting pipes are arranged inside a vacuum pumping pipe in parallel, an electric pressure sensing component is mounted in the vacuum pumping pipe, acrylonitrile butadiene styrene (ABS) plastic plugs capable of sliding vertically up and down are arranged in the wind pressure adapting pipes located inside the vacuum pumping pipe, T-shaped connecting bodies facing the central axis of the vacuum pumping pipe are arranged on side walls of the ABS plastic plugs, and the wind pressure adapting pipes located at the lower part of the ABS plastic plugs are filled with oxygen. The influence of wind pressure on the ABS plastic plugs is fed back to a traditional air pressure difference detection device and is further fed back to the distance between capacitor plates, so that the voltage change between the capacitor plates is influenced; another data acquisition way is provided and has the higher reference value, meanwhile, the sealed vacuum pumping pipe can reduce the influence of the temperature as much as possible, the stability of measurement results is improved, the density of the oxygen used for filling is relatively low, and the displacement range can be larger after the wind pressure is fed back to the ABS plastic plugs.

A shock-absorbing mechanism of a load-carrying vehicle comprises a frame, the frame is provided with a main transverse shaft, two sides of the frame are provided with main suspension mechanisms, and each main suspension mechanism comprises a swing plate spring, a support plate spring and a connecting structure. The connecting structure is arranged at the front side of the main transverse shaft, the support plate spring is mounted on the main transverse shaft and connected with the connecting structure. The front portion of the frame is connected with the connecting structure through the swing plate spring, and the swing plate spring is hinged to the frame. A main axle is mounted between connecting structures of two main suspension mechanisms. Connecting structures in the shock-absorbing mechanism of the load-carrying vehicle are mounted between two plate springs, so the two plate springs can support the main axle on the connecting structures, the bearing capacity can be raised, the scope of movement of main wheels mounted to the main axle can be enlarged during buffer, and the cross-country performance of a vehicle can be raised. The swing plate springs can swing because the swing plate springs are hinged to the frame, the lifting range of the connecting structures can be further increased, the scope of movement of main wheels is further enlarged, and the cross-country performance of the vehicle can be further raised.

A road milling machine and a leg swinging mechanism for same. The leg swinging mechanism comprises a dual-rocker mechanism formed of a frame (1), a swing rod (5), a rotatable sleeve rod (2), and a fixed connecting rod (4). The swing rod (5) and the rotatable sleeve rod (2) are rockers. The fixed connecting rod (4) is a connecting rod. A rotatable connection is formed between the fixed connecting rod (4) and the rotatable sleeve rod (2) with a leg (3) of the road milling machine being a hinge axis, and the fixed connecting rod (4) and the leg (3) are fixedly connected, and are parallel to each other before and after the swinging of the dual-rocker mechanism. The structure of the leg swinging mechanism does not change the travel direction of the tires or continuous tracks during the swinging of the leg (3), and with small movement ranges of the two rockers, the leg (3) located at the hinge point has a large displacement range, is compact in structure, and occupies a small space.