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

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 discloses a large-flexibility rotary hinge with annularly and uniformly distributed semi-ring sheets. The large-flexibility rotary hinge comprises a cylindrical and annular fixed part and an input / output part which is coaxial to the fixed part and is on the same plane of the fixed part, wherein 3-6 semicircular spring sheets with the uniform inner diameter, outer diameter and width are uniformly arranged between the fixed part and the input / output part at intervals; one ends of the spring sheets are in internally tangent connection with the inner wall of the fixed plate; the other ends of the spring sheets are in externally tangent connection with the outer wall of the input / output part; a cross-shaped or spline-shaped connection hole is formed in the center of the input / output part. According to the large-flexibility rotary hinge, large-angle two-dimensional rotary output can be obtained; structural sizes and the sheet quantity of the spring sheets can be changed according to a specific working environment to obtain a proper maximum rotary angle; the annular uniform distribution structure of the spring sheets is adopted so that the stability of angle output is improved, namely the rotation rigidity of the other two shafts is increased and the drifting of axes in the rotation process is reduced; the large-flexibility rotary hinge with the annularly and uniformly distributed semi-ring sheets is simple in structure and convenient to machine, and can be integrally machined and molded by using a linear cutting machine.

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 connection structure for beam column nodes of a module-assembly-type building. The structure can be applied to corner nodes, mid-side nodes and mid nodes of module-assembly-type beam column nodes. The structure greatly improves the rotation rigidity of the beam column nodes and helps to enhance constraint for column ends, thereby lowering the coefficient for effective length of columns. The columns with the same cross section have higher stable bearing force, and accordingly the lateral load resistance capacity and integrality of the module-assembly-type steel structure building are improved.

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 an air-free tire and an automobile. The air-free tire comprises a rubber tread and a wheel spoke, and the rubber tire face is arranged on the wheel spoke in a sleeving mode; the wheel spoke comprises a wheel spoke outer ring, a wheel spoke middle ring, a wheel spoke inner ring, inner spokes and outer spokes. The two ends of the outer spokes are fixedly connected with the wheel spoke outer ring and the wheel spoke middle ring correspondingly, the two ends of the inner spokes are fixedly connected with the wheel spoke middle ring and the wheel spoke inner ring correspondingly, and the outer spokes, the wheel spoke middle ring and the inner spokes form a fishbone-shaped structure. The automobile comprises the air-free tire. According to the air-free tire and the automobile, the phenomenon that tire burst occurs when the automobile travels at high speed is prevented, and safety and reliability of automobile driving are improved.

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 modular steel frame and belongs to the technical field of structural engineering. According to the modular steel frame, the double-column and double-beam combined effect can be brought into full play. The modular steel frame comprises a plurality of same modular unit layers. Each modular unit layer comprises a plurality of modular units, and each modular unit is a box-typeframe formed by a frame column and a frame beam which are connected. The modular steel frame further comprises a connecting assembly which comprises inner sleeves, column connecting bolts and beam connecting bolts. In the same modular unit layer, the four frame columns in the middle are connected into a combined middle column through the corresponding column connecting bolts, the two frame columns on the outer side face are connected into a combined side column through the corresponding column connecting bolts, and the frame columns at the corners are corner columns. In every two adjacent modular unit layers, the vertically-adjacent two combined middle columns, two combined side columns and two corner columns are connected through the inner sleeves correspondingly. In every two adjacent modular unit layers, the four frame beams in the middle are connected into a combined middle beam through the corresponding beam connecting bolts, and the two frame beams on the outer side faces are connected into a combined edge beam through the corresponding beam connecting bolts.

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.

The invention discloses an H-shaped steel and square pipe assembly type joint and a construction method. The H-shaped steel and square pipe assembly type joint comprises a square pipe and H-shaped steel, and further comprises a T-shaped plate, a supporting steel bar, an upper limiting piece and a lower limiting piece; the supporting steel bar is horizontally welded to the side face of the square pipe; an inserting groove corresponding to the supporting steel bar is formed in the side face of a bottom plate of the T-shaped plate; a connecting groove is formed in an end web of the H-shaped steel; a longitudinal plate of the T-shaped plate is in butt joint with the connecting groove and is welded to an upper flange plate and a lower flange plate of the H-shaped steel; high-strength screws are welded to the positions, located above and below the H-shaped steel, of the side face of the square pipe; the upper limiting piece and the lower limiting piece are connected with the high-strength screws in an inserted mode and fixed through high-strength nuts; and the upper limiting piece and the lower limiting piece are connected with the flange plates of the H-shaped steel through high-strength bolts. The H-shaped steel and square pipe assembly type joint is easy to assemble on a construction site, few in assembly procedure, convenient to assemble and disassemble, convenient to use repeatedly, high in construction efficiency, capable of effectively exerting the stress performance of a square pipe column, wide in application range and capable of being widely applied to connection of an H-shaped steel beam and the square pipe.

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.

A differential assembly is described, in the form of a crown differential for use in a driveline of a motor vehicle. The differential assembly comprises a one-piece differential carrier which is rotatably drivable around an axis of rotation and, in a casing portion, comprises no more than two identical openings for mounting sideshaft gears rotatably held in the differential carrier on the axis of rotation, as well as differential gears, which rotate jointly with the differential carrier around the axis of rotation and engage the teeth of the sideshaft gears. With reference to a longitudinal central plane, the openings are arranged so as to be mirror-symmetrical and comprise an axial length corresponding at least to the diameter of the differential gears, and a greatest circumferential extension which, in a radial view, corresponds at least to the diameter of the sideshaft gears.

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.

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.

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.