164results about How to "Ensure movement stability" patented technology

The present invention provides an internal knee joint prosthesis which comprises a femoral prosthesis (1) which is connected with the far end of the femoral, a tibial gasket (4) which is fixed at a tibial support (5), the tibial support which is connected with the close end of a tibia, a tibial intercondylar eminence (3) filled into the intercondylar hole (4c) of the tibial gasket (4) and the protrudent platform (5f) hole of the tibial support (5) and a bolt (2) which ensures the opposite position of the tibial intercondylar eminence (3) with the tibial gasket (4) and the tibial support (5). The inner condylar (4a) and outer condylar (4b) joint faces of the tibial gasket (4) are respectively opposite to the inner condylar (1a) and outer condylar (1b) joint faces of the femoral prosthesis (1), so as to ensure that the femoral prosthesis (1) can realize the actions of extending, bending and backwards rolling at the tibial gasket (4). The tibial intercondylar eminence (3) is extended into the condylar interval area (1d) of the femoral prosthesis, so as to ensure the knee extension stability of the knee joint. The part of the tibial intercondylar eminence (3) near the outer condyle (1b) of the femoral prosthesis (1) is excised to ensure that the femoral prosthesis (1) has larger outwards rotation angle at the bending knee position, so as to realize the deep bend of the knee joint.

The invention discloses a lever lateral mobile damping four-wheeler manned lunar rover folding system and belongs to the field of spaceflight. The system solves the problem that a four-wheeler is easily overturned integrally, difficultly climbs, runs into hollow surfaces, works cumbersomely, is high in energy consumption, low in adaptability and occupies a large space to hinder the implementation of exploration tasks and the like under the complicated geographical conditions on the surface of a star in the prior art. One side of a first rover body (1-1) is welded with two right-angled steel channels (6); the other side of the first rover body (1-1) is in folding connection with one side of a second rover body (1-2) through two middle connection folding mechanisms (8); the other side of the second rover body (1-2) is welding with two right-angled steel channels (6); the first rover body (1-1) is detachably connected with the second rover body (1-2) through a pair of rolling shaft pins (9) and pin slots (15); the lower end face of a bearing plate rover (1) is uniformly provided with four dual-wheel moving mechanisms. The system is used for a manned lunar rover.

The invention relates to a redundant drive five degrees of freedom parallel machine tool with a large rotation angle. The redundant drive five degrees of freedom parallel machine tool with the large rotation angle includes a fixed platform, a movable platform for installing a main shaft head and a first driving branch, a second driving branch, a third driving branch and a fourth driving branch forconnecting the fixed platform and the movable platform, the structures of the first driving branch and the second driving branch are similar, and the first driving branch includes a hooke hinge, a servo driving unit, a revolute pair and a compound sphere hinge; the third driving branch includes a hooke hinge, a servo driving unit and a compound sphere hinge, the fourth driving branch includes a revolute pair, a servo driving unit, a hooke hinge and a revolute pair, and the movable platform of a machine tool and the four driving branches are hinged to form a space closed-cycle parallel mechanism; and the three-dimensional translation and the two-dimensional rotation of the space can be achieved by controlling six servo motors to drive the four branches. The redundant drive five degrees offreedom parallel machine tool with the large rotation angle has the advantages that the branch structures are simple and compact, the orientation workspace is large, the flexibility is high, the rigidity is large, and the singular configuration can be prevented, and can be used for high-speed, high-precision and efficiency machining for free-form surface in complex space.

The invention relates to a multi-layer conveying belt tea leaf fragrance extraction machine and a control method. The fragrance extraction machine comprises a PLC control unit, an automatic tea leaf feeding unit, a fragrance extraction and baking unit and an automatic tea leaf discharging unit, wherein the automatic tea leaf feeding unit comprises a vertical elevator and an automatic tea leaf weighing device, and the fragrance extraction and baking unit comprises a transferring conveying belt, a transverse leaf evening device, a longitudinal leaf evening device and a multi-layer conveying beltbaking unit; and the transferring conveying belt is arranged below a discharge port of the automatic tea leaf weighing device and conveys tea leaves to the multi-layer conveying belt baking unit, thetransverse leaf evening device moves in the length direction of the transferring conveying belt to evenly scrape the tea leaves on the transferring conveying belt, the longitudinal leaf evening device moves in the width direction of the transferring conveying belt to evenly scrape the tea leaves on the transferring conveying belt, and the multi-layer conveying belt baking unit comprises a plurality of layers of conveying belts for conveying the tea leaves from top to bottom and heating baking units arranged on the two sides of the conveying belts. The multi-layer conveying belt tea leaf fragrance extraction machine and the control method solve the problem that the tea leaves are stacked on the conveying belts, and guarantees the tea leaf baking uniformity.

The invention discloses a wishbone shaped bell-less blast furnace distributor. The distributor is characterized in that: the distributor comprises a distributor casing, a top cover, a water cooling disc, an upper slewing bearing, a rotation sleeve, trunnion rings, a lower slewing bearing, trunnions, trunnion cranks, a chute carriage, chutes, a venture, and a horizontal transmission device for controlling the beta angle of the chutes; the lower part of the trunnion ring is connected with the fixed ring of the lower slewing bearing; and two sides of the chute carriage are respectively hinged to the lower end of the rotation sleeve through two trunnions. A key improvement of the distributor is characterized in that: the distributor comprises a trunnion ring anti-tilting mechanism and a trunnion ring driving device for driving the trunnion ring to up-down move, and the trunnion ring anti-tilting mechanism comprises a rigid driving arm and a rigid balance arm. The distributor has the following advantages: a shortest driving chain is used to realize the radial component force-free and symmetrical two-point driving of the trunnion ring by a hydraulic cylinder, and the anti-tilting mechanism can effectively prevent the trunnion ring from tilting to all directions in the up-down movement process.

The invention belongs to the field of platform screen doors of high-speed railways/intercity railways and discloses a high-speed railway platform door based on a dislocation structure and a control method thereof. The high-speed railway platform door comprises at least two slide rails which are parallel to each other and are arranged in the length direction of the platform edge, and a plurality ofmovable unit doors which are provided with driving units and are capable of sliding along the respective slide rails are arranged on the slide rails; and each movable unit door comprises a bearing plate at the bottom and a door body unit vertically arranged on the bearing plate, a moving wheel and guide sliding blocks are arranged on the bearing plate, the bearing plate is arranged in each sliding rail through the guide sliding blocks in a sliding mode, the moving wheel is driven via each driving unit to drive the whole movable unit door to move on the ground of the platform in the directionof the sliding rails. The high-speed railway platform door is based on the dislocation structure, a plurality of movable unit doors are arranged on a plurality of rows of slide rails in a staggered manner, and the door opening position is adjusted in real time according to the specification of the incoming vehicle type so as to adapt to various vehicle types on the high-speed railway platform.

A cassette for storing sheet media includes a box body with an opening, wherein the cassette further includes a pressing plate located in the box body, and a self-driven mechanism for driving the pressing plate to move towards the opening; the self-driven mechanism includes a support frame connected with the pressing plate, a driving shaft arranged on the support frame and driven by an elastic energy storage element, travelling gears synchronously moving on the two sides of the support frame, and guide racks matched with the travelling gears and extending along a stacking direction of the sheet media; and the travelling gears are driven by the driving shaft.

The invention discloses a logistics trolley track commutation retracking device which comprises a commutation track and a retracking device frame. The retracking device frame is provided with a lead screw and a motor. A belt drive unit is connected with the lead screw and the motor. A cross beam is fixed below the retracking device frame. A composite bearing is matched with a guide sliding chute in the cross beam. A common linear bearing is matched with an unthreaded shaft on the other side of the cross beam. The composite bearing and the common linear bearing are fixed to the commutation track. The lead screw is matched with a driving nut on the commutation track to form a lead screw drive mechanism. By means of the logistics trolley track commutation retracking device, the problems that the retracking device is inconvenient to produce, install and maintain, high in cost, short in bearing life, high in operation noise and unsteady to move are solved. The retracking device has the advantages that the composite bearing is long in service life, and no maintenance work at the later period is required. The installation process is simple, operation is steady, noise is small, and movement is steady and reliable.

The invention provides a full-view probing robot monobody for a complex region at the ferromagnetic environment, which belongs to the technical field of a probing robot moving with multiple degrees of freedom. The robot monobody comprises left and right feet and a main body; each of the left and right feet comprises a steering engine A, a steering engine B, a steering support A, a steering support B and an electromagnet; and the left foot and the right foot adopt the same connecting way and are in mirror symmetry when in assembly. The main body comprises a front cross beam and a rear cross beam; a battery box and a main control case are respectively processed at the outer side of each of the front cross beam and the outer side of the rear cross beam; and the main control case is internally provided with a single chip microcomputer. The robot monobody provided by the invention has a creative and simple mechanical structure with double coupling and 4 degrees of freedom and is high in reliability; and the robot monobody has various modes of motion, can rapidly realize the switchover between rolling motion and feet motion, can efficiently adjust gait and step pitch, can accurately and rapidly realize adjustment of moving direction in the range of 0-360degree, can realize stereoscopic motion in total space and can achieve multiple objectives of crossing obstacles and ravines, turning corners and changing directions.

The invention provides an automatic turnover device for a printed circuit board, and belongs to the technical field of printed circuit board preparation. The device comprises a linear mechanism, a rotating mechanism, a width adjusting mechanism and a clamping mechanism; the rotating mechanism comprises a seat body arranged on the linear mechanism and a rotating air cylinder arranged on the seat body; the width adjusting mechanism comprises a shell, a gear, a width adjusting motor and a rack, the shell is connected with a rotating shaft of the rotating air cylinder, two strip-shaped through holes are formed in one side face of the shell, the rack is in sliding fit with a horizontal guide rod, the horizontal guide rod is arranged on the inner wall of the shell, connecting strips are arranged on the top face of the rack, and penetrating rods are connected to the connecting strips, the two penetrating rods extend out of the strip-shaped through holes respectively and are connected with L-shaped frames located outside the shell respectively; the clamping mechanism is installed on the L-shaped frames. According to the automatic turnover device, automatic turnover is achieved to replace manual operation, conveying of a front silk-screen procedure and a rear silk-screen procedure is carried out; the automatic turnover device is high in flexibility and can adapt to circuit boards of different sizes and can adapt to the situation that conveying slightly deviates and is high in practicability.

The invention discloses a multifunctional feeding device for a vertical screen vibrating sand making machine, which comprises a feeding box body, a material distribution plate and elastic parts; the upper end of the feeding box body is an incompletely closed feeding The lower end surface is a fully-opened discharge port; in the feed box, a distribution plate is arranged transversely relative to its axis; an elastic member is axially arranged between the distribution plate and the feed box; The feed box is located on the square of the impeller of the sand making machine, and the material distribution plate, the impeller, the feed pipe of the sand making machine, and the vibrating mechanism of the sand making machine are arranged correspondingly on the same axis from top to bottom; The material distributing mechanism and the vibrating mechanism on the vertical vibrating vibrating machine work together to make the material make full use of the collision force, and the crushing strength is greater. The above structure can effectively solve the problem of unsmooth discharge of materials in the vibrating vibrating vertical vibrating mechanism and sand making. The problem of low crushing efficiency and insufficient crushing of materials has greatly improved the crushing efficiency and quality of materials, and reduced the energy consumption of crushing.

The invention relates to an end face cleaner for track pin bushings. The end face cleaner for track pin bushings is characterized by comprising two cleaning support vertical plates, a cleaning support transverse plate, a split brush mechanism, a compressing cylinder and a press plate; the cleaning support transverse plate is fixed between the cleaning support vertical plates; the split brush mechanism is mounted on the cleaning support transverse plate; the compressing cylinder is vertically mounted in the middle of the cleaning support transverse plate; the press plate is mounted below the compressing cylinder. The end face cleaner for track pin bushings is scientific and reasonable in structural design, the end faces of pin bushings can be automatically cleaned by means of brushing, and the end face cleaner for track pin bushings has the advantages of compact structure, high automation level, good cleaning effect and prominent targeted level.

The invention relates to a multi-stage continuous tea fragrance-enhancing machine and a control method thereof. The tea fragrance-enhancing machine comprises a PLC control unit and a primary fragrance-enhancing feeding unit a first incense unit, a primary fragrance-enhancing unit, a cooling feeding unit, a secondary fragrance-enhancing feeding unit, and a secondary fragrance-enhancing unit arranged in the direction of tea processing in order. The machine can quantitatively supply and automatically discharge materials, not only reduces the labor intensity, but also improves the transportation efficiency, and the quantitative feeding ensures the quality of the tea fragrance-enhancing, and realizes the automatic and continuous production of the tea fragrance-enhancing; the machine realizes three-dimensional stereo heating by a up-and-down heating mode in the first fragrance-enhancing unit and the secondary fragrance-enhancing unit, and has strong complementarity, fully utilizing hot air,and has strong penetrating ability. a more uniform temperature field is created, the tea is evenly heated, the machine is not easy to produce sheet, red sheet and broken tea, enhances the quality andaroma of the tea.