60results about How to "Improve rotational stiffness" patented technology

A micro-oscillation element includes an oscillation section and a frame. The oscillation section is provided with a mirror surface and is connected to the frame via trapezoidal first and second springs. The oscillation section is located between the first spring and the second spring. Each of the first spring and the second spring is deformable along with the oscillation of the oscillation section.

A torque detecting device includes a pair of fixed portions are provided on a rotating shaft to have a predetermined distance in an axially longitudinal direction, a permanent strain portion which changes a magnetostrictive characteristic corresponding to an applied torque is provided between the fixed portions, and a multilayered solenoid winding coil for electrically detecting a magnetostrictive effect produced in the permanent strain portion is provided around the permanent strain portion. The permanent strain portion is a portion in the rotating shaft to which a permanent strain is applied by twisting the fixed portions.

A pedestal system comprises a base having a lower cylinder and an upper rotatably supported with respect to the lower vertical cylinder. A lower motor is coupled between the lower and upper cylinders to selectively cause rotational motion between the cylinders. Also provided is a top-most horizontal cylinder with a rotating shaft. The shaft has a bearing coupling the top-most horizontal shaft with respect to the upper vertical cylinder. Finally, an upper motor is provided. The upper motor is coupled between the top-most horizontal shaft and upper cylinder to selectively cause a rotational motion between the top-most horizontal shaft and the upper vertical cylinders.

A kit servomotor consists of an electromotor and a rotary encoder. The electromotor has a motor stator (3, 8) and a rotor (1), which is positioned in unsupported fashion in the motor stator. The motor stator (3, 8) and the rotor (1) can be installed on the output end. The rotor (1) is designed as a hollow shaft, at least on its end opposite the end used for installation. The rotary encoder is attached to the electromotor on the end opposite the installation end and has a stator unit (4) and an encoder shaft (5). The stator unit (4) is connected to the motor stator (3, 8). The encoder shaft 5 is connected to the rotor (1) using a coupling that is isogonal with respect to the angle of rotation, but elastic in the radial and axial directions. At its motor end, which is coaxial to the hollow shaft of the rotor (1), the encoder shaft (5) has an outer diameter that is smaller than the inner diameter of the hollow shaft. The coupling is axially flat in design and bridges the annular gap between the outer diameter of the encoder shaft (5) and the inner diameter of the hollow shaft of the rotor (1).

The invention provides a space assembly type tooth-type joint structure, and relates to a tooth type joint structure. Problems that assembly type connection joints in the prior art cannot meet requirements of free-form surface single-layer latticed shell structures, ball joints are required to be welded and constructed on site, construction cost is high, construction quality is difficult to guarantee, existing assembly type semi-rigid joints have obvious shortcomings when used in free-form surface single-layer latticed shells, and requirements of rigidity and universality cannot be simultaneously met well are solved. The space assembly type tooth-type joint structure comprises a hollow ball and a connecting assembly, wherein the connecting assembly comprises a middle lug plate, tooth-type bolts, a connecting rod end plate, a connecting rod, a nut and lug plate connecting side plates, wherein the lug plate connecting side plate is fixedly mounted on the connecting rod end plate; the connecting rod is fixedly mounted on the connecting rod end plate; the middle lug plate and the two lug plate connecting side plates are connected to one another through the tooth-type bolts; and the middle lug plate is fixedly mounted on an excircle surface of the hollow ball. The space assembly type tooth-type joint structure is used in the field of civil engineering buildings.

The invention discloses a conductive rail connector expansion joint assembly. The conductive rail connector expansion joint assembly includes a fixed rail, wherein fixed rail grooves are formed in two sides of the fixed rail; a movable rail, wherein movable rail grooves are formed in two sides of the movable rail, and the movable rail and the fixed rail are distributed at an interval in the axial direction; a first limiting clamping plate and a second limiting clamping plate, wherein the first limiting clamping plate and the second limiting clamping plate clamp the fixed rail and the movable rail from two sides and allows the movable rail to move in the axial direction of the movable rail; an outer current connector, wherein the outer current connector forms a long circular structure extending in the axial directions of the fixed rail and the movable rail, and the outer current connector are connected to the fixed rail and the movable rail through connection members; an inner current connector, wherein the inner current connector forms a long circular structure extending in the axial direction of the fixed rail and the movable rail, and the inner current connector is positioned in the outer current connector and is connected to the fixed rail and the movable rail through connection members. The conductive rail connector expansion joint assembly is suitable for a working condition having a high demand for installation bounds and electrical insulating clearances.

The invention discloses post-tensioning self-resetting joints capable of multi-stage energy dissipation and an assembling method for the post-tensioning self-resetting joints. The joints can slide relative to one another, and provide energy dissipation under small deformation through a mode of unilateral friction between a T-shaped piece and a beam flange, with increasement of deformation of openings of the joints, an SMA damper connected with a T-shaped plate begins to enter a phase transition energy dissipation phase, and introduced metal damping cannot increase residual deformation of the joints at the same prestress level; and for avoiding the characteristic of low redundancy of the post-tensioning joints, contact pressure-bearing of a bolt rod connecting the T-shaped piece and the beam flange and the oblong hole wall of the beam flange is allowed through an oblong hole, and under extreme conditions, collapse can be effectively resisted. According to the post-tensioning self-resetting joints, under small to middle seisms, friction damping is used for energy dissipation, energy dissipation in a combined energy dissipation mode can be realized by cooperating with SMA phase transition under middle to large seisms, and by means of post-tensioning prestress reinforcements, complete resetting is realized; and under the extreme conditions, joint force transfer is transformed intocollapse resistance in a hole wall pressure-bearing mode, and multi-stage energy dissipation and the multi-redundancy property are realized.

An apparatus for preventing a vehicle pedal from being pushed rearward upon a head-on collision of the vehicle is provided. The apparatus includes a collision bracket that is fixedly installed on a dash panel and a pedal arm formed by bending a plate along a predetermined reference line to form a cavity in a lengthwise direction thereof. A rotating member is disposed at an end of the pedal arm and strikes one side of the pedal arm upon colliding with the collision bracket, to rotate in a direction toward the inside of a vehicle and to release the pedal arm. A supporting bracket rotatably supports the pedal arm and the rotating member. The rotating member includes a coupling aperture upon which the supporting bracket is hinged and a plurality of arms which are oriented in different directions with respect to the coupling aperture.

When a finishing operation is performed while rotating a workpiece at a main shaft drive of a machine tool, pulsation occurring in a rotation of the main shaft drive is restricted and the rigidity of a main shaft is increased without increasing the size of a bearing. A rotation-resistance device of a main shaft drive in a machine tool has the following structure in the main shaft drive including a main shaft 4, a rotating body 65, and a driving device 6, the main shaft 4 being supported so as to be rotatable with respect to a frame body 2, the rotating body 65 being secured to an end of the main shaft 4, the driving device 6 rotationally driving the rotating body (65). The rotation-resistance device includes a damping device (10) including a damping member, which is provided at the frame body 2 or the rotating body 65 and which includes a resiliently deformable damping section, a pressing-force applying device 66, which applies a pressing force to the damping member by operating fluid, and a damping surface 32, provided at a side of the frame body 2. The damping device 10 causes the pressing force to act upon the damping section to flex the damping section, so that the damping surface 32 and a sliding surface 33 are pressed against each other, and a rotation resistance that allows rotation is applied to the rotating body 65. A low-friction coefficient member 60 is secured to at least one of the damping surface 32 and the sliding surface 33.

The invention discloses a design measure which can carry out shock insulation, shock absorption and energy consumption on a high-rise or tall building structure. Horizontal shock insulation layers are arranged. Besides, vertical lateral load resistance components (or structures) are fixed to the bottom of the high-rise building structure, vertical horizontal shock insulation or shock absorption layers are arranged and have the capacity of horizontal relative displacement, and dampers, springs and locking devices can be arranged. According to the several adopted main measures, reinforcing layers or reinforcing arms are arranged on part of the vertical lateral load resistance components or the structures; the vertical lateral load resistance components or the structures are partially and fixedly connected or hinged with a shock insulation main body; the vertical sections of the horizontal shock insulation layers are in a shape of a broke line or a circular arc or a curve, and the shock insulation structure has the swing type shock insulation effect; a vertical bearing structural body does not need to be provided with a horizontal shock insulation layer, thin layers or structural layers with large deformability can be arranged according to demands, and a shock absorption and energy consumption system can be formed.

The invention provides a self-reset swinging inner barrel shock absorption water tank which comprises a base mounted on a lower support structure, outer barrel walls mounted on the base and inner barrel walls mounted in the outer barrel walls, wherein storage water is mounted between the inner barrel walls and the outer barrel walls; six self-reset swinging bearings are uniformly arranged on the base along each inner barrel wall; each self-reset swinging bearing comprises a lower lug plate mounted on the base via a base embedded part, an upper lug plate connected with the lower lug plate via a bolt and four prestress rods symmetrically arranged between the lower lug plate and the upper lug plate; inner barrel wall embedded parts with the same quantity as that of the self-reset swinging bearings are uniformly arranged at the lower ends of the inner barrel walls; the inner barrel walls are fixedly connected with the corresponding upper lug plates via the inner barrel wall embedded parts; and dampers are further arranged at the upper ends between the inner barrel walls and the outer barrel walls. The water tank has the advantages of stable anti-seismic property, good shock absorption effect, reduced structure cost, factory module production and the like.

Disclosed is a gusset plate connection with sliding end plates for a buckling-restrained brace, including central plate (1), first rib plate (2), second rib plate (3), horizontal end plate (4), first horizontal tie plate (5), second horizontal tie plate (6), bolts (7) and unbonding layers (8). Horizontal end plate (4) is perpendicular to the central plate (1) and fixedly disposed on a lower end surface of central plate (1). First horizontal tie plate (5) and second horizontal tie plate (6) are both disposed on an upper surface of horizontal end plate (4) and are located at two sides of central plate (1), respectively. Unbonding layers (8) are each disposed at a bottom surface of horizontal end plate (4), between horizontal end plate (4) and first horizontal tie plate (5), and between horizontal end plate (4) and second horizontal tie plate (6). The components are connected by means of bolts (7).

A rotating device includes a sleeve which encircles a shaft, a housing which supports the shaft and which forms an annular supporting recess where the lower end of the sleeve enters together with the shaft, a ring member which is provided above the sleeve and which is fixed to the shaft in a manner encircling the shaft. A first gap between the sleeve and the shaft includes first and second radial dynamic pressure generating portions. An annular sleeve recess is formed in upper face of the sleeve. The ring member includes a ring entering portion that enters the sleeve recess in a non-contact manner. An outward gap in the radial direction where the ring entering portion and the sleeve recess face with each other in the radial direction includes a second air-liquid interface of a lubricant.

The invention discloses an air floatation supporting guide device with a non-equal-depth throttling cavities. Throttling plugs are regularly arranged on an air floating working face to form non-equal-depth array throttling cavities, on the premise that the bearing and the stability of an air floating guide rail are guaranteed, the rotating rigidity of a unit area on the air floating working face can be improved. According to the device, the air floating supporting guide device which is small in size, long in cantilever length and large in torque load can be established.

The invention discloses a flexible supporting structure comprising at least two flexible supporting units for connecting a reflector with a supporting base. Each of the flexible supporting units includes an upper end block for being connected with one reflector, a lower end block for being connected with the supporting base and two reeds; the two reeds are arranged between the upper end block andthe lower end block in a staggered mode, wherein the center lines of the two reeds coincide; and the upper end block and the lower end block are symmetrically distributed along the center lines of thetwo reeds. The center lines of the reeds of the flexible support units are collinear. Therefore, the flexible supporting structure has a simple structure, the production cost is greatly reduced, andthe flexible supporting structure is convenient to manufacturing. Meanwhile, the weight and the size of the flexible supporting structure are reduced; the rotational inertia of the flexible supportingstructure is reduced; the system power consumption is reduced; and the control bandwidth and the system reliability are improved. In addition, the invention also discloses a one-dimensional quick reflector comprising the flexible support structure and a two-dimensional quick reflector comprising the flexible support structure.

The invention provides a torsion-resistance and shock-absorption support with natural vibration frequency adjustable. The torsion-resistance and shock-absorption support comprises a top plate, a sliding groove and two sets of elastic shock-absorption blocks, wherein a first pivoting part is downwards formed in the middle of the top plate, the sliding groove is opposite to the top plate, a second pivoting part is upwards formed in the middle of the sliding groove, and the first pivoting part is pivoted to the second pivoting part through a pivoting shaft; the shock-absorption blocks are elastically supported and slidably arranged between the top plate and the sliding groove, and the two sets of shock-absorption blocks are located on the two sides of the pivoting shaft respectively. The shock-absorption blocks play a role in vertical shock absorption, and the shock-absorption blocks are matched with the pivoting shaft to achieve the effect of torsional buffering, so that the shock-absorption performance is greatly improved; the shock-absorption blocks are arranged in the sliding groove in a sliding mode, the position of the shock-absorption blocks in the sliding groove is adjusted tochange the distance between the shock-absorption blocks and the pivoting shaft, and then the rotation rigidity of the shock-absorption support is changed. Therefore, the shock-absorption effect can be greatly improved, and the rotating rigidity and the shock-absorption performance can be adjusted according to the actual condition of transportation materials.