1257 results about "Ball joint" patented technology

The invention provides a small-bending-radius pipe push-bending device and a using method thereof.The small-bending-radius pipe push-bending device comprises an upper supporting plate, a push rod, a hydraulic pressurizing pipe, a guide sleeve, a push-bending mold, a sealing joint, a sealing ring, a rubber ball, a pressure sensor, a hydraulic pushing cylinder, a movable ball joint and a hydraulic pressurizer. The using method comprises the following steps that firstly, a straight pipe needing to be machined is installed on the inner side of the push-bending mold; the guide rod is attached to the guide sleeve; a plurality of rubber balls are filled in the inner cavity of the straight pipe; a gap of an inner cavity of the straight pipe is filled through the hydraulic pressurizer; starting the press to apply downward pressure to the push rod; the liquid filling pressure is set to pressurize and support the interior of the pipe, and the pipe begins to be bent and formed along with descending of the push rod; and after 90-degree bending forming is completed, the liquid filling pressure is gradually increased for pressurization shaping. By adopting the mode of filling gaps with rubber balls and hydraulic pressure, the supporting pressure in the pipe is improved; and by adopting a differential friction form, the length of a linear section is increased, and meanwhile uniform stress in the bending process is achieved.

A showerhead assembly is provided which includes an arm mount assembly for releasably and / or extendably holding a handheld showerhead. The arm mount assembly includes one or more shoulder portions and a movable arm portion. The arm mount assembly comprises a coupler, a second shoulder outlet, and a connection end. The connection end is configured to couple with the handheld showerhead by a rear side or proximal end thereof, or an adapter operatively coupled therewith. The means for coupling can include magnets, a hook and loop mechanism, or a ball joint connection. In addition, a spring-button tab mechanism can be utilized for managing the operative engagement and disengagement of the arm mount assembly with the handheld showerhead. The arm mount assembly provides for a wide range of adjustability of the showerhead assembly, such as panning, swiveling, tilting, and / or rotation of the handheld showerhead.

The invention relates to the technical field of concrete defect identification, and discloses a concrete defect state identification and passive detection combined control method under a super-tonnage block type spherical hinge, which is used for solving the problem that defect prediction cannot be realized during concrete defect identification, and comprises the following steps: setting sampling points in a concrete structure in a layered manner, acquiring strain monitoring data of each sampling point, judging whether the sampling points have defects or not, if so, performing grouting repair intervention treatment, if not, acquiring risk parameters of concrete defects, and evaluating according to the risk parameters to obtain defect risk indexes; whether the sampling points have the risk of concrete defects or not is judged, if the sampling points have the risk of concrete defects, early warning and vibration equipment parameter adjustment are carried out on the sampling points according to the defect risk indexes, the structure quality safety and the construction efficiency are effectively improved, and the engineering field intelligent management and control degree is improved.

A spherical ball joint has an outer ring 2 of a nickel based material with a carbonitriding layer on a spherical inner surface 2a sliding on an inner ring 3 of a cobalt-based or nickel-based material

The invention relates to the technical field of composite material mechanical property detection, in particular to a composite material plate compression test clamping device, which comprises a fixed seat, and a clamping mechanism, a power device and a loading assembly which are arranged on the fixed seat, the clamping mechanism comprises a first clamping assembly and a second clamping assembly which are oppositely arranged, the first clamping assembly is driven by a power device to move towards the second clamping assembly, the sample plate is clamped and fixed from the two sides of the sample plate, and the stability of uniform clamping of the sample plate is ensured. The first movable clamping plate and the second movable clamping plate are connected with the loading assembly and are driven by the loading assembly to move towards the first fixed clamping plate and the second fixed clamping plate respectively. A clamped and fixed sample plate is vertically loaded by independently controlling a loading assembly, the loading assembly comprises a downward pressing seat and a loading rod arranged on the downward pressing seat, a ball head part of the loading rod is rotationally connected with the downward pressing seat, a ball joint can compensate the installation angle deviation of the sample, and it is ensured that a compression load acts on the center of the sample plate in the vertical direction all the time.

The invention provides a ball joint mechanism with a compact structure, which comprises a solid ball body and a shell capable of accommodating the ball body, and a ball handle is arranged at the upper part of the ball body; a stepped through hole is formed in the position, corresponding to the ball handle, of the ball body, the stepped through hole is composed of a small hole section and a large hole section, the small hole section is a threaded hole, the large hole section is an unthreaded hole, an opening of the small hole section faces upwards and is located on the ball handle, and an opening of the large hole section faces downwards and is located on the spherical surface of the ball body; an adjusting screw plug, a spring and a plunger are sequentially installed in the stepped through hole from top to bottom, one part of the adjusting screw plug is in threaded fit with the small hole section, the other part of the adjusting screw plug is located in the large hole section, the outer side end of the plunger can extend outwards from an opening of the large hole section under the elastic force action of the spring, and the end face of the outer side end of the plunger is a spherical surface; a curved surface seat is arranged on the lower portion of the shell, the curved surface seat is provided with an inner concave surface, and the outer side end face of the plunger is in contact fit with the inner concave surface of the curved surface seat. The ball body in the structure can obtain large damping feeling during rotation and is very smooth during rotation.

A toy figure (1) with a plurality of movable body parts (2) is provided. In each case, two body parts (2) are releasably connected to one another by a ball joint (4). The ball joint (4) has a first joint part (41) and a second joint part (42). Each joint part (41, 42) has a first end and an opposite second end, which are connected to each other via a joint axis (43). A joint head (411) is arranged at the first end of the first joint part (41) and a joint socket (421) is arranged at the first end of the second joint part (42). The joint socket (421) movably accomodates the joint head. An anchor for attaching the respective joint part to a body part is arranged at the second end of the first joint part and at the second end of the second joint part.

The invention discloses a multifunctional cutting base and a cutting method for a large fan casting, and relates to the technical field of casting cutting machining.The base comprises a self-adaptive supporting platform, a combined type damping assembly, a vibration control unit and a chip and oil mist recycling unit; the self-adaptive supporting platform is attached to the bottom of a casting through a plurality of spherical hinge universal planes with angles and heights adjusted hydraulically to form a profiling supporting face so as to achieve multi-point self-adaptive clamping. The combined type damping assembly conducts damping adjustment along with machining vibration dynamic response through the damping unit in cooperation with the vibration control unit, and the machining posture of the casting is stabilized. The cuttings and oil mist recovery unit is used for synchronously collecting and separating dust, metal cuttings and cooling oil liquid generated in the turning process through a liquid-solid separation module, a dust hood with a negative pressure suction function and a chip removal channel; the clamping stability and the machining precision of the large casting are effectively improved, the machining site environment is improved, and the problem that an existing large casting machining platform affects the casting machining state is solved.

The invention relates to a ball joint (10) for a motor vehicle, in particular for a chassis of the motor vehicle, comprising: - a joint housing (1) having a joint opening in which a bearing shell (6) is arranged, - a ball pin (2) having a joint ball (4) and a pin (5), which is mounted with its joint ball (4) in the bearing shell (6) in an articulated manner and which projects with its pin (5) through the joint opening out of the joint housing (1), and - a sensor device for detecting wear, wherein the sensor device has a circuit arrangement (11) which is mechanically actuated by the joint ball (4) and which is arranged within the joint housing (1), wherein the circuit arrangement (11) can be transferred, due to wear, from a basic switching position in which an electrical circuit (21) of the circuit arrangement (11) is closed into at least two further switching positions.

The invention discloses a device for measuring an electrochemical hydrogen permeation curve under a cross tensile load based on feedback compensation, and aims to solve the problems that in the prior art, the hydrogen permeation curve of a sample under the cross tensile load cannot be measured, and relaxed stress cannot be compensated during measurement. The device for measuring electrochemical hydrogen permeation under the cross tensile load based on feedback compensation comprises a circular bracket, a stress sensor, a ball joint tensile arm, a clamping assembly, a motor torque-axial force conversion assembly, a PC (Personal Computer), an electrochemical workstation and a sample, the method is applied to the field of electrochemical hydrogen permeation testing.

A position roller for meander control includes, in one example, a roller with a rotational axis; a first ball joint supporting a distal end among both ends of the rotational axis for pivotal movement; an XZ driver that drives a proximal end among both ends of the rotational axis into two-dimensional motion in a plane; and a base supporting the first ball joint and the XZ driver.

The invention provides a method for measuring the gravity center of a large component based on a distributed six-dimensional force sensor. The method specifically comprises the steps that firstly, the six-dimensional force sensor is installed below a spherical hinge of a positioner and used for measuring the contact force and friction torque of the spherical hinge; then, according to the conversion principle of force and torque between coordinate systems, the acting force and torque of the positioner on the large component and the gravity and gravitational torque of the large component are converted into the base coordinate system, and therefore a torque balance equation of the large component in the base coordinate system is established; and finally, adjusting the spatial attitude of the large component, and solving the center-of-gravity position by adopting a least square method according to the moment balance equation of the large component under different attitudes. According to the method of the scheme, aiming at the influence of the friction torque of the spherical hinge on the gravity center measurement precision during the gravity center measurement of the large component, the friction torque of the spherical hinge during the posture adjustment of the large component can be calculated, so that the gravity center measurement precision of the large component is improved.

The double-step high-performance sealed viscous damping wall comprises a viscous damper and steel frames installed at the two ends of the viscous damper, the outer sides of the steel frames are fixedly connected with lug plates, embedded parts are arranged on the side walls of the lug plates, and the two ends of the viscous damper are hinged to the steel frames through gapless spherical hinges; the viscous damper comprises an oil cylinder, a piston and a piston rod, and the oil cylinder is filled with damping liquid; a variable cross-section structure is arranged on the inner wall of the oil cylinder, so that the middle circulation cross section is larger than the cross sections at two ends, and intelligent grading regulation of damping force along with piston displacement is realized; the invention belongs to the technical field of civil engineering damping walls, and achieves the technical effects that the groove is machined in the middle of the oil cylinder, a double-step energy dissipation mechanism is constructed, when a piston moves in the range of the groove, silicone oil can flow through double channels of the enlarged radial gap and the communicating hole, the piston moves to break through the boundary of the groove due to an earthquake, and the damping effect is achieved. And the gap between the piston and the oil cylinder is compressed instantly, so that the comfort under small earthquakes is guaranteed, and high-efficiency dissipation of pulse energy during large earthquakes is ensured.

The invention belongs to the technical field of robots, and discloses a differential ball joint which comprises a shell, a first input bevel gear, a second input bevel gear, an output bevel gear and a phase adjusting assembly, and the first input bevel gear, the second input bevel gear and the output bevel gear are all rotationally arranged on the shell; the first input bevel gear and the second input bevel gear are both meshed with the output bevel gear, and the axis of the output bevel gear is perpendicular to the axis of the first input bevel gear and the axis of the second input bevel gear. The phase adjusting assembly is used for adjusting phases of the first input bevel gear and the second input bevel gear, so that gear teeth in the first input bevel gear and the second input bevel gear make contact with tooth surfaces of two adjacent gear teeth in the output bevel gear, and therefore transmission gaps between the first input bevel gear and the output bevel gear and between the second input bevel gear and the output bevel gear are eliminated. The transmission stability is improved, and the transmission noise is reduced.

The invention discloses a drag suction dredger rainbow blowing adjustable nozzle assembly and a bow spraying device and method, and belongs to the technical field of bow spraying. A rainbow blowing adjustable nozzle assembly of a trailing suction dredger comprises a nozzle part and a ball joint part used for connecting the nozzle part and a bow spraying pipeline on the dredger, and the ball joint part comprises a lower supporting frame, a lower supporting frame, a lower supporting frame, an upper supporting frame and a lower supporting frame, and one end of the lower supporting frame is connected with the bow spraying pipeline through a first flange; the upper supporting frame is fixedly connected to one side of the lower supporting frame, and a spherical groove is defined by the upper supporting frame and the lower supporting frame; the movable ball pipe comprises a reducer pipe and a ball body which are fixedly connected, the ball body is movably connected into the spherical groove, and the end, away from the ball body, of the reducer pipe is connected with the nozzle part through a second flange; by dynamically adjusting the spraying range of the nozzles, the slurry drop point can be flexibly changed, the effective operation range is remarkably expanded, drop point distribution is accurately controlled, the unevenness of the surface of a hydraulic reclamation area is effectively avoided, the flatness quality requirement is met, frequent ship displacement needed by drop point adjustment is reduced, and the construction efficiency is greatly improved.

The invention discloses a spherical pair locking mechanism and a medical instrument, and relates to the field of medical instruments. The ball pair locking mechanism comprises a ball joint and a locking assembly. The locking assembly comprises a transmission structure, an elastic piece, a locking gear and a force application driving piece. The rigid meshing locking mode of the locking gear and the meshing tooth edge of the inner ball head replaces traditional friction braking, locking force reduction and looseness caused by long-term use and abrasion can be avoided, the locking reliability is greatly improved, and the minimally invasive surgery positioning precision is guaranteed; a user can directly drive the transmission structure through the force application driving part to achieve switching between locking and unlocking of the ball joint, the mechanism is kept in a preset locking or unlocking state in a non-operation state by adjusting the locking gear and the meshing tooth edge and providing automatic reset force through the elastic part, manual intervention is reduced, and the rapid operation requirement of an operation scene is met. The mechanism is compact in structural layout, can adapt to the limited space of minimally invasive surgical instruments, and meets the requirements for locking strength and miniaturization.

The full-drive dexterous hand comprises a palm mechanism, a thumb mechanism and a finger mechanism, the thumb mechanism comprises a metacarpal bone, a thumb near knuckle and a thumb far knuckle which are sequentially distributed, the metacarpal bone obtains bending and rolling freedom degrees through gear transmission, and the thumb near knuckle and the thumb far knuckle both obtain bending freedom degrees through motor direct drive; the finger mechanism comprises a finger near knuckle, a finger middle knuckle and a finger far knuckle which are sequentially distributed, the finger near knuckle obtains bending and side-sway freedom degrees through gear transmission, and the finger middle knuckle and the finger far knuckle obtain bending freedom degrees through motor direct drive. A full-drive humanoid manipulator framework is adopted, high-precision motion mapping is achieved through 20 independent controllable degrees of freedom, the bionic core is that the ball joint design is adopted, the composite motion capacity of human fingers is highly simulated, fine actions such as grabbing, kneading and rotating of a human hand can be accurately reproduced, and the flexibility degree of the human hand is deeply restored.

The invention discloses a bidirectional sealing automobile spherical hinge assembly, and relates to the field of automobile spherical hinges, the bidirectional sealing automobile spherical hinge assembly comprises a ball pin column and a ball pin sleeve, the ball pin column is rotatably connected with the ball pin sleeve, the outer side of the connecting position of the ball pin column and the ball pin sleeve is sleeved with a rubber sleeve, the outer side of the bottom end of the rubber sleeve is connected with a threaded ring, and the top end of the rubber sleeve is connected with an upper sleeve; a plurality of sets of sealing rings are arranged at the top end of the upper sleeve, and the outer wall of the ball pin sleeve is in threaded connection with a locking ring. Through the arrangement of the rubber sleeve, the locking ring and the top disc, in the using process, firstly, the rubber sleeve needs to be connected to the outer side of the ball pin column in a sleeving mode, then the locking ring is rotated to fix and limit the bottom end of the rubber sleeve, then the outer side of the bottom end of the rubber sleeve is fixed and limited through the locking ring, and the top disc is fixed to the outer side of the ball pin column; and the top end of the rubber sleeve is further sealed by inserting the clamping ring into the sealing ring, so that the sealing effect is improved.

The invention relates to a robot ball joint singularity avoidance method based on damping factor analytic expression. The method comprises the following operation steps that a pose difference calculation module calculates the rotation matrix variable quantity of an end effector of a robot in real time; the self-adaptive Jacobian matrix construction module is used for a damping factor dynamic adjustment mechanism based on SVD (Singular Value Decomposition) analysis; the joint space updating module is used for realizing smooth updating of a joint angle through optimized inverse kinematics solution; through a theoretically guided damping adjustment mechanism, precision-continuity-efficiency triple optimization of singularity avoidance of the ball joint of the robot is realized for the first time, and a universal solution is provided for high-precision robot control.

A dust boot having an open end that includes an embedded mechanical fastener that secures the boot to a ball joint assembly and a ball joint assembly configured to engage with the embedded mechanical fastener.

The invention discloses a compact five-degree-of-freedom teleoperation hand of a series-parallel structure and a control mapping method of the compact five-degree-of-freedom teleoperation hand. The teleoperation hand comprises a base, a wire guiding device, a fixing sleeve, a rotary encoder, a driving arm, a spherical hinge butt joint device, a driven arm, a torsional spring, a movable platform, a front-end operation series connection platform and two angular displacement sensors. The rotary encoder is fixed to the wire guiding device through the fixing sleeve and used for measuring the rotation angle of the driving arm in real time. One end of the driving arm is fixedly connected with a rotor of the rotary encoder, and the other end of the driving arm is hinged with one end of the driven arm; the other end of the driven arm is hinged to the movable platform, and the two angular displacement sensors are used for measuring the pitch angle and the yaw angle of a handle of the front-end operation series platform. The front-end operation series platform is hinged to the movable platform and used for adjusting the posture of the teleoperation hand. The device is simple and compact in structure, low in cost and small in size; through combination of series connection and parallel connection, the rigidity requirement is guaranteed, and meanwhile the flexibility of the device is guaranteed.

A vehicle including a frame; a front left suspension assembly with a front left wheel; a front right suspension assembly with a front right wheel; a front gear train; a motor; shafts connected between the front wheels and the front gear train. Each front suspension assembly including a knuckle including: a first portion connected to a wheel hub and including a first ball joint, and a second portion extending upward from the first portion and including a second ball joint; a lower A-arm connected to the first ball joint; an upper A-arm connected to the second ball joint; the second ball joint being distanced from the wheel axis by a distance greater than the inner rim radius; and a shock assembly connected to the lower A-arm and the frame, the shafts passing below the ball joint of the shock absorber assembly which is vertically higher than the shaft.

A front engine attachment system for an engine having an engine pylon with a nose having a main female clevis and a cylindrical housing, a main rod fastened to the engine by a secondary ball joint connection about a secondary axis, a main shaft realizing a main ball joint connection of the main rod in the main female clevis about a main axis, wherein the main axis and the secondary axis are in the same vertical plane, a hollow outer cylinder with a vertical axis, of which a first end is fastened in the cylindrical housing and of which a second end is mounted so as to be able to move, via an annular linear connection, with respect to the front casing and an inner cylinder threaded and fastened in the outer cylinder.

The invention relates to the technical field of robot control, in particular to a motion control method and device of a parallel 3RRS robot, the parallel 3RRS robot and a medium, and the robot comprises a base platform, a movable platform and three RRS branch chains connecting the base platform and the movable platform. The method comprises the following steps: acquiring target attitude information and target position information of a mobile platform; based on the structure parameters of the RRS branch chain in the zero position state, the target attitude information and the target position information, calculating the center coordinate of a first plane figure formed by the center of the spherical hinge joint of the movable platform; calculating the center coordinate of the spherical hinge joint; projecting the central coordinate of the spherical hinge joint into a second plane figure determined by the first connecting rod of the corresponding branch chain and the Z axis of the coordinate system of the base; solving a target rotation angle of each first rotation joint based on the projection point coordinates; and finally, all joints are driven to enable the movable platform to move to the target pose. Complex space problems are converted into plane geometry solution, so that calculation is simple, and high-precision and high-efficiency real-time control is facilitated.

A tension adjustable forearm gripping exercise device that is made with large handles with a knurled surface made of aluminum and a center portion made of steel. The device is adjustable through the tension used in securing the handles through end cylinders into a center cylinder with a securing nut. Each handle terminates in a ball joint that is placed into end cylinders that are then attached to the center cylinder where the tension adjusting securing nuts are tightened to the end cylinders / handles to the desired tension.

A patient interface has a single loop headstrap and a mask for covering at least the nostrils of the user. The single loop headstrap extends from the mask at either end. A short length of supple conduit is coupled to the mask by a swivel or ball joint to allow rotation of the conduit relative to the mask through different angles and orientations.

The utility model discloses a mobile three-dimensional laser scanning device for a tunnel. The mobile three-dimensional laser scanning device comprises a workbench with supporting legs, walking wheels, a three-dimensional laser scanner, a gyroscope, a controller, a ball joint seat, a platform plate and two sets of electric cylinders, the ball joint seat comprises a seat body and a ball head; the electric cylinder comprises a cylinder body and a screw rod; the walking wheels are fixedly connected to the lower ends of the supporting legs; the seat body and the two cylinder bodies are arranged in a triangular shape, and the seat body and the cylinder bodies are respectively and fixedly connected with the workbench; the ball head is fixedly connected with a supporting rod, and the supporting rod is fixedly connected with the platform plate. A groove corresponding to the end part of the screw rod is formed in the lower end of the platform plate; the end part of the screw rod extends into the groove and is in contact with the top surface of the groove; the screw rod can slide along the top surface of the groove; the gyroscope is fixedly connected to the platform plate, and the three-dimensional laser scanner is fixedly connected to the workbench; the controller is electrically connected with the gyroscope and the electric cylinder. The utility model has the advantage that the efficiency of multi-site measurement in the tunnel is improved.

The utility model discloses a hanging mechanism of a gearbox of a motor train unit, and relates to the technical field of railway vehicles, the hanging mechanism comprises a hanging rod assembly which comprises a hanging rod body, and spherical hinge mounting through holes are formed in the two ends of the hanging rod body; the pair of spherical hinge assemblies are rotatably arranged in the spherical hinge mounting through holes respectively; each spherical hinge assembly comprises a spherical hinge arranged in the spherical hinge mounting through hole; the central shaft of the central shaft penetrates through the sphere center of the spherical hinge, and spherical hinge mounting holes are formed in the two ends of the central shaft; the suspender clamping mechanism comprises an upper suspender support and a lower suspender support which are arranged up and down; and the lifting lug mechanism comprises a pair of lifting lug pieces which are arranged at an interval. While the stability and safety of train operation are guaranteed, the damping and buffering effects are achieved, vibration from a rail can be effectively buffered, damage of vibration to a gearbox is reduced, the gearbox is protected against damage, and meanwhile the riding comfort of passengers is improved.

A method of installing a first aircraft structure 101 onto a second aircraft structure 102 uses a movable joint 10 which allows relative movement between the two structures in at least a first degree of freedom to position them, the joint contains a curable substance 50, such as epoxy resin, which is cured to prevent movement of the joint and fix the structures relative to one another. The joint may be a ball joint having a socket 22 which is attached to the first structure, and a ball stud 32 attached to the second structure, allowing relative movement in six degrees of freedom before curing. The ball and socket may have a textured surface in contact with the resin which may coat the surface of the socket and the ball or be added after alignment. An external heat source may be used to cure the resin, or it may cure in a certain period of time. The structures may be a landing gear leg fairing and a landing gear leg, the positioning before curing allowing alignment of the fairing with an external surface of the aircraft when the leg in in a retracted position.

A firearm maintenance aid can include a firearm vise and a firearm support device. Firearm vise can include vise jaws, a threaded rod connecting vise jaws together, and jaw pin holes in each jaw, the holes extending from an outer surface of a jaw through to an inner surface of each jaw, wherein the holes in the first jaw align with the holes in the second jaw. Firearm support device can include a clamping portion and a supporting portion. The clamping portion can be clamped between the jaws of the firearm vise, can include two parallel clamping faces, and can define vise pin holes that align with the jaw pin holes. The supporting portion can be located opposite the clamping portion and can include a cylindrical shaft. Vise pins can be received by the jaw pin holes and vise pin holes to fixedly connect the support device to the vise.