403results about How to "High torque transmission" patented technology

A deflectable tip catheter that is used in combination with a guidewire for delivery of an ablation element to target areas of a patient's vasculature. The deflectable tip catheter has a handle portion, an elongated shaft and a deflectable tip portion. A guidewire lumen extends through the elongated shaft and deflectable tip portion. A guidewire passes through the guidewire lumen and exits from a port in the distal end of the deflectable tip portion. The deflectable tip of the catheter is deflected by manipulation of the handle portion to direct the advancement of the guidewire as the guidewire is advanced out of the distal port. By using the deflectable tip portion to direct the advancement of the guidewire, the physician's ability to navigate sharp angles is greatly improved. The deflectable tip catheter is particularly suitable for delivering an ablation element to a pulmonary vein or pulmonary vein branch for performing circumferential ultrasound vein ablation to treat atrial fibrillation.

To provide a harmonic drive gearing with high degree of freedom in terms of layout. A harmonic drive gearing 10 includes a circular spline 1′, having outer teeth formed on an outer peripheral surface; an flexible spline 2, positioned at the outside of the circular spline 1′, and having inner teeth, which are engageable with the outer teeth of the circular spline 1′, formed on an inner peripheral surface; and a rotor 16 which is disposed at outside of the flexible spline 2 and serves as a wave generator, wherein the rotor 16 deflects the flexible spline 2 by minor axis portions of the inner peripheral surface of the flexible spline 2 and engages the inner teeth of the flex spline with the outer teeth of the circular spline 1′ and thereby the engagement position between the inner teeth and the outer teeth is adapted to move in a circumferential direction.

An interconnection assembly for the transport of a fluid between an external fluidic means and a mounting block of a modular fluid distribution system, comprising: a cylindrical cavity formed through a face of the mounting block; a cylindrical flow element, a fluid passage formed therethrough, at least one retaining groove being formed on the outer surface; a retaining means; wherein the cylindrical flow element is inserted into the cylindrical cavity, the annular sealing means being compressed, the annular sealing means forming a hermetic seal between the fluid passage and the fluid port, the retaining means engaging retaining groove, the retaining means being braced against the mounting block; and wherein said fluid is transported between said external fluidic component and said mounting block via said cylindrical flow element.

A multi-disc type fine-pitch magnetorheological clutch mainly consists of a driving shaft, a driven shaft, a magnetic conduction shell, magnetic conduction baffle plates, a magnet exciting coil, driving discs, driven discs, a magnetic isolated sleeve, a magnetic isolated hub, a support and a sealing device. The driving discs and the driven discs are respectively mounted on the magnetic isolated sleeve and the magnetic isolated hub in a clearance manner, and are respectively connected with the driving shaft and the driven shaft via the magnetic conduction baffle plates, a clearance between each driving disc and the adjacent driven disc is micron-sized, magnetorheogical fluid is fully filled in the clearances, the magnet exciting coil is fixed in a cavity formed by the magnetic conduction shell and a magnetic isolated copper ring, cooling liquid is filled in a cavity of the magnetic isolated hub via a water injection screw plug, sealing of the cooling liquid is realized by a sealing ring, during working, the cooling liquid flows into the driven discs via radial round holes on the magnetic isolated hub, heat dissipation of working devices is accelerated, the temperature of the magnetorheogical fluid is reduced, and slip frequency power of the device is increased. The multi-disc type fine-pitch magnetorheological clutch is compact in structure, high in transmission torque, fine in heat dissipation performance and long in service life, and does not generate electric sparks.

Torque transmission between a tube and a drive unit mounted in the tube is ensured with the aid of a component which is optimized for installation while providing a sufficient centering effect. A rotary support is hereby provided which is constructed as a hollow cylindrical body (1). An elastic connection device (3), e.g. an O ring which is disposed on the outer circumference of the hollow cylindrical member (1) in a defined arrangement, is used for elastically connecting the hollow cylindrical member (1) to the tube. The elastic connection device (3) has a centering and damping effect while ensuring the torque transmission, and channels (6) ensure a coolant flow passage/cooling circuit.

The invention discloses a novel gear continuously variable transmission, aiming to provide a continuously variable transmission with large transmission torque, high transmission efficiency, good reliability and good fuel economy. The present invention includes a first input shaft, a second input shaft, a one-way clutch, a gear, a planetary ring gear, a planetary gear, a first planetary carrier, a sun gear, a second planetary carrier and an output shaft, and the planetary gear continuously variable transmission passes through The power input of two degrees of freedom of the first input shaft and the second input shaft realizes the function of stepless speed change. The invention has the advantages of simple structure and convenient manufacture, and can effectively realize the stepless speed change function.

The invention relates to a rotary steering well drilling device in the field of well drilling tools. The rotary steering well drilling device is mainly composed of a central spindle, a positioning cylinder, a positioner, a positioning key, a tension spring, a control valve, a control pin, a compression spring, an offset block, a bearing and a sealing device. The central spindle is connected with a drill column and a drill bit. During deflecting, an offset mechanism stretches out, the drill column and a well hole are eccentric, the positioning cylinder and the offset mechanism do not rotate, the drilling pressure and the torque are transmitted to the drill bit through the central spindle, and therefore a deflecting section can conduct rotary and directional drilling. During angle holding, the offset mechanism retracts back, the drill column and the well hole are concentric, the drilling pressure and the torque are transmitted to the drill bit through the central spindle, and therefore an angle holding section conducts rotary drilling. The rotary steering well drilling device is high in deflecting capability, wide in application range and capable of greatly reducing the well drilling cost of a well of a complex structure, and meanwhile the rotary steering well drilling device has the beneficial effects of being simple and reliable in structural design, convenient to machine, large in transmission torque, stable in operation and the like.

Each steel element for a V-belt of a continuously variable transmission has a flank (4a) that comprises a plurality of equally spaced raised portions (41) each being placed between two fine grooves (42). A flat flatness ratio (FR) given by the equation (1) is set to the highest one of values that are capable of practically machining the flank (4a) of the steel element (4) and capable of causing the flank (4a) to exhibit a given and satisfied lubrication oil discharging effect, and a groove pitch (GP) that is a distance between the two fine grooves (42) is set to a value that is capable of practically machining the flank of the steel element and capable of causing the flank to exhibit a given and satisfied lubrication oil discharging effect. The groove pitch thus set is a value that is permitted by the higher value of the flatness ratio thus set.

FR (%)=WRP/(WRP+WG)×100  (1)

• • wherein:
    • FR: Flatness ratio
    • WRP: Width of the raised portion (41)
    • WG: Width of the groove (42)

In a rolling ball type two-stage low speed changer device 1, empirical formulas are obtained as a relationship between number of first, second, third and fourth lobes z1, z2, z3, z4 of a hypo based groove 6 (8) and an epi-based groove 7 (9). The relationship is represented by z1>z2, z3>z4, z1−z2=2, z3−z4=2 and z3=n×z2×½ (n: integer), and enables to a precise and smooth rotational transmission without inviting differential slippage and incurring an irregular rotation and uneven torque transmission on an output shaft 16 within the practical usage, and reducing a thickness dimension to render a whole structure compact, achieving a high transmission efficiency without inviting a backlash, and attaining a high torque transmission with low noise.

The invention discloses a coaxial contrarotating speed reducer. A first-level planetary gear train is used for speed reduction, and two inner gear rings of a second-level composite differential gear train are used for realizing speed reduction and a constant speed output function of coaxial contrarotating. A first-level planetary gear is simultaneously engaged with a first-level center gear and a first-level inner gear ring to form a first-level speed reduction system; a second double planetary gear, a second-level double center gear, a second-level inner gear ring, a second-level double inner gear ring, a second-level fixed shaft gear and a second-level sun gear form a second-level coaxial contrarotating speed reduction system. The first-level center gear and the second-level double center gear are separately fixed to an input shaft. An output shaft is divided into an output inner shaft and an output outer shaft, the output inner shaft penetrates through the output outer shaft, and the inner and outer shafts are connected with an output optical axis. The second-level inner gear ring is fixedly connected with the output inner shaft to complete the positive output of the system; and the second-level double inner gear ring, the second-level fixed shaft gear and the second-level sun gear are fixedly connected with the output outer shaft to complete the negative output of the system. The speed reducer has the advantages of simple structure, high speed reduction ratio, large transmission torque and smooth operation.

The invention discloses a two-gear transmission for an electric vehicle. The two-gear transmission is applicable to front-engine front-drive or rear-engine rear-drive vehicles, is positioned at the output end of a driving motor, and is of a three-shaft structure. The two-gear transmission comprises an input shaft assembly, an intermediate shaft assembly, an output assembly and a case assembly, wherein rotation central lines of the input shaft assembly, the intermediate shaft assembly and the output assembly are parallel; the input shaft assembly, the intermediate shaft assembly and the output assembly are mounted and supported on the case assembly. According to the two-gear transmission, the transmission efficiency is high, the structure is simple, the transmission ratio is liable to match, and the production and manufacturing cost is relatively low; the transmission torque is large, gear shifting control is accurate, reliability is high, and performance requirements that power is not interrupted during the gear shifting process, the time of the gear shifting process is short, and the gear shifting process is smooth can be met; the lighter driving motor can be adopted, and the cost of the driving motor is reduced; and the driving motor and a transmission system are integratedly designed, so that the comprehensive cost of an electric driving system is greatly reduced, and the loading compatibility on different vehicles is higher.

The invention relates to a speed-reduction one-way clutch, which comprises: a spindle axle (17), a hollow axle (14), and a large spring (13), wherein the hollow axle (14) and the large spring (13) sheathes the spindle axle (17); one end of spindle axle (17) extrudes outside the hollow axle (14), while another end is arranged with external screw spindle axle to match the internal screw spindle of hollow axle (14); said hollow axle (14) via axle linear (15) is arranged with gear spindle sheath (12) whose outer ring at one end is the external gear while the inner ring at another end has five rolling rooms (19), and each room (19) has at least one group of rollers (18) and flat springs (10); the outer end of rolling room (19) is arranged with clamp plate (9) and cover (8). The invention has simple structure, low cost, low noise, large transmission torque and stable operation.

The invention relates to a reducer with less tooth difference, comprising a box body, an input shaft and an output shaft, wherein a universal coupler is arranged between the input shaft and the output shaft; an eccentric shaft head is arranged at the end part of the input shaft and is provided with an oscillating bearing; the oscillating bearing is provided with a bearing bush; the input end of the universal coupler is fixedly connected with the bearing bush and a swinging bevel gear; the box body is fixed with a fixed bevel gear meshed with the swinging bevel gear; and the input end of the universal coupler is connected with an output shaft; teeth of the fixed bevel gear are more than teeth of the swinging bevel gear, the structure is compact, and when fixed bevel gear is meshed with theswinging bevel gear, a crossed axis angle ranges from 150 degrees to 178 degrees. Due to the arrangement, the number of the meshed teeth of the fixed bevel gear and the swinging bevel gear are more than those of traditional hear transmission, so that transmitted torque is large, and speed change with the large reduction ratio and large load can be realized; and due to the arrangement of a balancedevice, the problem of laterality when the swinging bevel gear rotates can be solved, so that a reduction gear can move more stably and has low noise.

The invention discloses an electromagnetic tooth embedding type clutch used for achieving driving separation and reunion of a first motor and a second motor. The clutch comprises a joystick, an annular electromagnet, an armature, an elastic reset mechanism, a movable end face gear and a fixed end face gear, wherein the joystick is inserted in an inner cavity of a rotor of the second motor, the two ends of the joystick are located on the two sides of the rotor of the second motor respectively, a magnetic attraction mechanism and a mesh transmission mechanism are located on the end sides of the rotor of the second motor respectively, compact axial arrangement is achieved, and therefore space of the clutch is substantially saved, and structural compactness degree of the clutch is improved. The invention further discloses a two-motor hybrid power system, under the action of the structural characteristics of the electromagnetic tooth embedding type clutch, an engine, the first motor and the second motor can be coaxially arranged, and according to the arrangement mode, not only is the advantage that the structure is compact achieved, but also transmission efficiency is improved.

The invention relates to a gear and rack transmission anti-backlash mechanism. The gear and rack transmission anti-backlash mechanism comprises a gear and a rack. The rack is formed by stacking a first rack body and a second rack body and is meshed with the gear. The anti-backlash mechanism further comprises a lead screw shaft, a bearing support, needle bearings, a nut, a nut support and a plane spiral spring which are placed in a cavity formed in the first rack body and the second rack body. The two ends of the lead screw shaft are installed on the bearing support through the needle bearings, and the bearing support is fixed to the second rack body. The lead screw shaft is matched with the nut, and the nut is installed on the first rack body through the nut support. The two ends of the plane spiral spring are fixed to the lead screw shaft and the second rack body respectively. According to the anti-backlash mechanism, when a transmission backlash occurs between the gear and the rack, teeth of the two rack bodies are staggered under the elasticity effect of the spiral spring, the equivalent tooth thickness is increased, the transmission backlash between the gear and the rack is eliminated, transmission torque is large, the structure is simple, work is reliable, and the gear and rack transmission anti-backlash mechanism is suitable for the field of numerical control without backlash transmission, and especially for high-accuracy numerical control machine tools and robots.

The invention relates to a double-snap reversing ratchet wrench to solve the problems of the conventional ratchet wrench that a clutch device is complicated in structure, a plurality of components are arranged to cause low loading torsion, parts are positioned in a single way to cause high processing cost and the service life is short. The double-snap reversing ratchet wrench comprises a handle and a wrench body connected to one end of a stress application rod, and is characterized in that a ratchet perpendicular to the stress application rod is arranged in the wrench body; one end, facing the stress application rod, of the ratchet is provided with a direction switch; the direction switch comprises a direction handle and a steering body which is positioned below one end of the direction handle and is perpendicularly connected with the direction handle; two sides of the steering body are respectively provided with a snap; the bottom end of the steering body is provided with a spring hole seat; the wrench body at one end of the spring hole seat is provided with a cover plate. The double-snap reversing ratchet wrench is provided with a few parts, and is simple in structure and compact in integral structure, the positioning way between the components is flexible, a single component has sufficient strength design space, and the double-snap reversing ratchet wrench transfers large torque and is reliable, wear-resistant, easy to assemble and maintain, and easy and convenient to operate.

The invention relates to a gear rack drive revolving worktable. The gear rack drive revolving worktable comprises a working table, a box, a lifting driving mechanism, a revolving driving mechanism and a gap eliminating mechanism, wherein the revolving driving mechanism is driven by a gear and a rack; the rack is formed by laminating two racks; and the gap eliminating mechanism comprises a lead screw shaft, a bearing bracket, a rolling needle bearing, a nut, a nut bracket and a plane scroll spring placed in a cavity formed in the two racks. The revolving worktable is driven by a hydraulic cylinder, can realize 180 degrees of fixed-angle transposition, can automatically eliminate the gap, and is large in transfer torque, simple in structure and reliable in operation.

A tool head includes a connecting component, a driving component, and a spacer assembled together. The connecting component includes a receiving end forming a first compartment and a second compartment. The driving component includes an engaging end forming a first engaging section and a second engaging section. The tool head has a tight-fit region in which the first engaging section and the spacer are tightly fit within the first compartment and a fit region in which the second engaging section is retained within the second compartment.

The invention relates to a rotary power head of a cosine tooth profile drilling machine. A cosine tooth profile transmission and speed change device is composed of an input gear shaft, a large gear and an output shaft, a cover plate is fixed on a machine seat, a flange is fixed on the cover plate, the input gear shaft is supported on the cover plate and the machine seat respectively together with a bearing A and a bearing B, a motor is fixed on the flange and connected with the input gear shaft, the output shaft is supported on the machine seat and the cover plate respectively together with a bearing C and a bearing D, a joint type forced filling oil cup penetrates a small end cover at the tail part of the input gear shaft and is connected with the input gear shaft, an air inlet hole is arranged on an air chamber, the air chamber is fixed on the machine seat, a seal A and a seal B are matched with the air chamber and the output shaft, a radial hole on the output shaft is communicated with the air chamber, and an internal thread hole is arranged on the output shaft. The invention has the advantages of overcoming the shortcomings of a traditional speed reducer and the rotary power head, providing a universal series for the speed reducer and providing a rock drilling mechanical rotary power head which is convenient to detach and mount, small in radial size, large in transfer torque and applicable to heavy load for the drilling machine.