305 results about "Constant velocity" patented technology

A vehicle-mounted GNSS positioning method based on multi-motion model interaction includes: establishing a position-constant velocity (PCV) model and a position-constant steering angular velocity (PCSAV) model for two attitudes of a carrier (i.e., linear motion and turning motion) respectively to obtain a state estimation vector and a state transition matrix of the carrier of the PCV model and the PCSAV model at a previous moment, introducing an interacting multiple model (INM), establishing a heuristic position-velocity filtering (HPV)-IMM model based on the IMM model to achieve an information filtering interaction between the PCV model and the PCSAV model, and obtaining a state estimation vector and an error covariance matrix of the carrier at a current moment, so as to obtain a position and velocity of the carrier at the current moment. The present disclosure solves the problem of low accuracy of a traditional single kinematic model in multi-motion attitude vehicle positioning.

A motion control system is described. The motion control system includes a releasable coupling coupled to a fine positioning stage and a coarse positioning stage. The releasable coupling is configured to mechanically couple the fine positioning stage to the coarse positioning stage during coarse positioning movements to transfer movement force from the coarse positioning stage to the fine positioning stage, and mechanically release the fine positioning stage from the coarse positioning stage during a processing operation such that the fine positioning stage is mechanically and dynamically decoupled from the coarse positioning stage. This release facilitates precision movements of the fine positioning stage. Mechanically coupling the fine positioning stage to the coarse positioning stage during coarse positioning movements facilitates reducing a required mass, volume, and / or energy consumption of fine positioning stage actuators, because these actuators need only control the relatively shorter stroke constant velocity movement of the fine positioning stage.

A secondary disaster early warning method based on ground-based SAR monitoring of deformation data includes (1) real-time monitoring of a secondary disaster unstable area through ground-based SAR to obtain deformation monitoring data; (2) constructing a displacement-time curve generated by the secondary disaster unstable area over time; setting a monitoring period, and based on the displacement-time curve, constructing a displacement change triangular area model; (3) based on the displacement change triangular area model, constructing an area-time curve, and obtaining the area-time curve change trend and the displacement triangular area in the displacement-time curve according to the monitoring period; (4) dividing the secondary disaster development process into an initial deformation stage, a constant velocity deformation stage, and an accelerated deformation stage; (5) setting early warning levels corresponding to each stage for phased secondary disaster early warning; and (6) quickly and comprehensively identifying the secondary disaster development stage and deformation evolution trend.

The utility model relates to the technical field of universal joint manufacturing, in particular to a constant velocity universal joint assembly compression length and weight detection device. Comprising a workbench; the fixing device is arranged at one end of the workbench; the plurality of bearing devices are arranged on one side of the fixing device; the weight detector is arranged on the bearing device; and the extrusion device is arranged on the outer side of the bearing device, the universal joint is placed between the fixing device and the extrusion device and is supported by the bearing device, so that the assembly compression length of the universal joint is detected, and meanwhile, the weight of the universal joint is detected through the weight detector. The compression length and weight detection equipment for the constant velocity universal joint assembly has the advantages of being capable of rapidly detecting the compression length and the weight of the universal joint assembly, high in working efficiency, wide in application range, simple in structure, convenient to operate and the like.

In a tripod type constant velocity universal joint of a double roller type, a projection 40 is provided in regions including both end portions in a direction orthogonal to a joint axial line O on a shaft end side with respect to an inner ring 12 on an outer peripheral surface of a leg shaft 32 of a tripod member 3. A ratio T / ag1 between a dimension T in a direction of the joint axial line O of the projection 40 and a major diameter ag1 of a contact portion with the inner ring on the outer peripheral surface of the leg shaft 32 is 0.3 or more.

The invention relates to the technical field of lubricating grease, in particular to a lubricating grease composition containing organic bismuth and application of the lubricating grease composition in a constant velocity universal joint. The lubricating grease composition comprises at least one base oil, at least one organic bismuth, at least one organic phosphorus, at least one organic molybdenum and at least one thickening agent. Experimental research finds that organic bismuth and organic phosphorus generate a synergistic effect in the lubricating grease containing organic molybdenum, and in the synergistic effect, the extreme pressure resistance of the universal joint lubricating grease can be improved by the organic bismuth and the organic phosphorus, so that the service life of a universal joint is prolonged, meanwhile, the friction coefficient can be reduced, and excellent ACFG performance is provided.

To reduce an induction thrust of a double offset type slidable constant velocity universal joint, to make it suitable for use in a power transmission system of a vehicle (EV or HEV) with an electric motor as a drive source.SOLUTION: In a double offset type slidable constant velocity universal joint 1 that is provided in a power transmission system of a vehicle with an electric motor as a drive source, an axial gap (pocket gap) δ1 is formed between a pocket 12 of a holder 5 and a ball 4, and an axial gap δ2 of 0.6 mm or more is formed between a spherical part 15 of an inner surface of the holder 5 and a spherical outer peripheral surface 8 of an inside joint member 3.SELECTED DRAWING: Figure 3

The invention relates to a wheel bearing arrangement, comprising a hub (10), a wheel bearing (20) arranged on the hub (10), a wheel carrier (30) to which the wheel bearing (20) is fixed by means of a wheel bearing outer ring (21), comprising a synchronous universal joint (40) which is axially clamped to the hub (10) by means of a planar tooth meshing device, and comprising a sealing ring (50) which surrounds and seals the planar tooth meshing device on the radially outer side. A sealing ring is pre-assembled on the constant velocity joint and engages with the hub outside the force flow of the wheel bearing in the assembled state of the wheel bearing arrangement, the sealing ring providing a contactless pre-seal for the wheel bearing while interacting with the wheel carrier.

This invention discloses a calibration unit for a constant velocity universal four-wheel alignment instrument with a hinged rod, belonging to the field of transportation technology. It includes a unit base, a drive motor mounted on one side of the unit base, a constant velocity rotating seat mounted above the unit base, a kingpin assembly mounted above the constant velocity rotating seat, half-shaft assemblies snapped onto both sides of the kingpin assembly, and angle adjustment assemblies sleeved above the kingpin assembly. Two angle adjustment assemblies are included, each comprising an angle adjustment base, an angle adjustment drive arm, an angle adjustment hinge plate, an angle adjustment kingpin sleeve, and an angle adjustment lever. The upper surface of the unit base is movably connected to the lower surface of the angle adjustment base. The inner side of the angle adjustment base is fitted to one end of the angle adjustment drive arm, and the other end of the angle adjustment drive arm is connected to the angle adjustment lever. The end of the angle adjustment lever away from the angle adjustment drive arm is connected to the angle adjustment hinge plate, and the inner side of the angle adjustment hinge plate is connected to the angle adjustment kingpin sleeve. This invention uses a constant velocity universal joint with a hinged rod, improving measurement accuracy.

The utility model discloses a light electric single-wheel balance car driven by an external motor. The light electric single-wheel balance car comprises an electric control and seat cushion unit, a suspension lower movable unit, a motor driving unit, a shock absorber, a battery pack unit, a wheel set unit, a pedal and the like. A high-speed motor is used for speed reduction through a gear and power transmission through a constant velocity universal joint, and finally a belt speed reducer is used for driving a wheel set to rotate, so that modular power layout is achieved. Due to the fact that the power / weight ratio of the high-rotating-speed motor is larger, the total weight of the vehicle can be effectively reduced. The suspension structure of the triangular double shock absorbers can reduce the number of components. The upper half part of the universal coupling is fixed in the shell of the driving unit, the lower half sliding part of the universal coupling is positioned below the damping system spring, and the motor is fixedly mounted through the expansion joint of the universal coupling, so that the power unit does not move along with the suspension. Due to the adoption of the modularized structure, the disassembly and maintenance are convenient, and the reassembly and combination are simple and convenient. The last stage adopts belt transmission, noise is reduced, and maintenance is convenient.

The invention relates to the technical field of cannonball outer trajectory measurement, in particular to an outer trajectory parameter measuring device and method based on an electric field sensor array. The system comprises a detection array composed of four electric field sensors. The method comprises the following steps: according to an electric field intensity change rate detected by an electric field sensor when a charged projectile flies nearby the electric field sensor, establishing each parameter relational expression by combining a Coulomb law; and carrying out indirect measurement on the position and the speed of the charged projectile according to the calibration and speed calibration equation. According to the invention, the electric field sensor is used for non-contact measurement of outer ballistic parameters based on the electrostatic detection technology, no interference is caused to the projectile, the cost is low, and the operation is simple; the device is high in adaptability, can be suitable for various different measurement environments, and is wide in application range.

A grease composition for outboard constant velocity joints, comprising (a) a diurea-based thickener and (b) a base oil containing a synthetic oil and having a kinematic viscosity at a temperature of -20°C measured according to JIS K 2283 of 3,000 to 20,000 mm2 / s.

To provide a wheel bearing device that facilitates assembly of a face spline without deteriorating the sealing performance of a seal member that prevents muddy water from entering the face spline.SOLUTION: A wheel bearing device comprises: an outer ring 2; an inner member including a hub ring 3 and an inner ring 4; balls 7; a constant velocity universal joint 20 coupled to the hub ring 3; and an inner-side seal member 9 which seals between the outer ring 2 and the inner ring 4. A face spline 11a and a face spline 25a are formed on an inner-side end face of the hub ring 3, and a shoulder portion 25 of the constant velocity universal joint 20. A cover member 17 is provided to protect an outer diameter side of the face spline 11a and the face spline 25a. An inner diameter of the cover member 17 is formed so as to increase in diameter toward the inner side.SELECTED DRAWING: Figure 1

A log splitter includes a chassis having a support table configured to support a log to be split, a splitter screw having a generally conical shape and mounted to a rotatable screw shaft that is supported by the chassis, and a drive assembly configured to rotate the shaft to impart rotational movement to the splitter screw about a screw axis. The drive assembly includes a motor coupled to the screw shaft via a constant velocity transmission (CVT) (also known as continuously variable transmission). The CVT can provide both high speed and high torque during the splitting process as required to split the log. A fall restriction bar helps restrict a person from accidentally falling onto the splitter screw. An engine-kill bar is pivotally mounted to the chassis. A log-rotation stop mechanism is configured to restrict rotation of a log that gets stuck on the splitter screw.

A tool for removing a constant velocity (CV) joint from a driveshaft. The tool can include a frame with a first end arranged at a vehicle side of the CV joint and a second end arranged at a wheel side of the CV joint. The tool can further include an engagement member arranged at the first end of the frame. The engagement member can at least partly enclose the driveshaft and can engage with an inner race of the CV joint from the vehicle side of the CV joint. During use, the tool can be arranged such that a force applied to the frame at the second end of the frame in a direction away from the CV joint is transferred through the frame to the engagement member causing the engagement member to engage the inner race of the CV joint, thereby removing the CV joint from the driveshaft.

The present invention belongs to the technical field of helicopter structural design, and discloses a universal hinged hub structure with a hub elastic support and a working method thereof; wherein the universal hinged hub structure includes: a ball cage constant velocity universal hinged hub, a hub elastic support, a pitch change assembly, and a connecting bracket; the ball cage constant velocity universal hinged hub is used to connect to the rotor shaft of the helicopter; the pitch change assembly is installed on the ball cage constant velocity universal hinged hub and is used to connect to the helicopter's blades; the hub elastic support is installed on the ball cage constant velocity universal hinged hub, and the hub elastic support is installed with a connecting bracket, and the connecting bracket is used to connect to the helicopter's rotor shaft; the hub elastic support is used to support the ball cage constant velocity universal hinged hub and provide operating torque for the helicopter. The technical solution of the present invention discloses a ball cage constant velocity universal hinged hub structure with a hub elastic support, which can overcome the technical defect that the existing traditional constant velocity universal hinged hub is difficult to provide operating torque.

To propose a drive shaft having high strength and allowing an increase in torque transmission capacity with ease, in a structure where a fixed type constant velocity universal joint and a sliding type constant velocity universal joint are mounted on both ends of a hollow intermediate shaft.SOLUTION: The intermediate shaft is hollow over its entire length. A shaft portion is coaxially and integrally formed with the inner race of the fixed type constant velocity universal joint, and an end opening of the intermediate shaft is solid-phase bonded to the shaft portion. A shaft portion is coaxially and integrally formed with the tripod of the sliding type constant velocity universal joint, and the other end opening of the intermediate shaft is solid-phase bonded to the shaft portion.SELECTED DRAWING: Figure 1

Various techniques for three-dimensional trajectory prediction of a stylus are described. An input device, such as a stylus, includes an integrated Inertial Measurement Unit (IMU) (e.g., 3-axis, 6-axis, 9-axis, . . . ) that generates IMU data that is used to predict a future location of the stylus (e.g., the pen tip) in relation to a surface, such as a display surface. The stylus transmits IMU data to a computing device to perform the trajectory prediction. The IMU data is analyzed (e.g., via a machine learning mechanism, or some other device / component) and a stylus state is determined to be in one of a constant velocity state, a constant acceleration state, a constant angular velocity and velocity state, or a constant angular velocity and acceleration state. A prediction model to perform the trajectory prediction can be selected based on the current state of the stylus.

A high-density storage system for goods is described in which totes carrying the goods are stored in a storage structure and stored and retrieved via stationary or mobile conveyors running along opposite ends of each layer of the storage structure. The totes may be moved to or from the conveyors as the rows move at a constant velocity toward or away from the conveyors. Totes at the ends of rows are quickly moved and stored in another row until the desired tote appears at the end of the row, at which point the desired tote is carried to an exit point of the storage structure by one of the conveyors.

This invention discloses an axial piston pump with a main shaft driven at a constant velocity to rotate an inclined cylinder assembly. The pump includes a pump body, a main shaft, a turntable on the main shaft, ball joints, and a cylinder mounted on the outer side of each ball joint. A piston mechanism is located between the cylinder and the turntable. A distribution plate is located on the outer side of the cylinder, and inlet / outlet flow channels are located inside the pump body. Multiple curved groove raceways or multiple straight groove raceways are located on the outer surface of the ball joints. Corresponding raceways are provided between the cylinder and the multiple curved groove raceways or multiple straight groove raceways. Torque is transmitted through the rolling contact of balls within the raceways, forming a fixed or telescopic ball cage type constant velocity universal joint transmission mechanism, achieving constant velocity drive of the inclined cylinder rotation by the main shaft. Because the components at both ends of the piston, namely the turntable and the cylinder, rotate at completely equal and synchronous speeds, the "floating" motion of the float in a float pump can be effectively solved, making the internal rotating components operate more stably under high-speed driving conditions and reducing friction and wear problems.

The present invention discloses a coupling device for an outer constant velocity joint and a wheel hub bearing unit, and a torque transmission method. The wheel hub bearing unit includes a wheel hub outer ring and a wheel hub inner ring. The wheel hub inner ring has a conical center hole. A protrusion is provided at the end of the outer constant velocity joint. The outer surface of the protrusion is a conical outer surface that matches the inner surface of the conical center hole. The protrusion is inserted into the center hole of the wheel hub inner ring. A friction-enhancing structure is provided between the conical outer surface and the inner surface of the center hole. The end of the outer constant velocity joint and the wheel hub inner ring are locked by a locking member, so that the conical outer surface and the inner surface of the conical center hole are tightly fitted to form a conical surface. The present invention can eliminate the commonly used internal and external spline matching structure, simplify the component structure, reduce the component weight, and eliminate noise caused by relative sliding between the end face of the wheel hub bearing unit and the end face of the outer constant velocity joint.

A plunging-type constant velocity universal joint includes outer and inner joint members having linear track grooves, balls, and a cage accommodating the balls in pockets. Curvature centers of spherical outer and inner peripheral surfaces of the cage are offset toward opposite sides with respect to a joint center. A range between distances of 10 mm towards deep and opening sides from a center portion of a sliding range of the track groove of the outer member in the axial direction is a center range, and a region in which a PCD of the track grooves of the outer member becomes smallest is in the center range. A minimum value of a PCD clearance in the track grooves in the center range is from 0.010 mm to 0.100 mm. A PCD mutual difference of the track grooves of the outer member in the center range is 0.150 mm or less.

A tripod type constant velocity universal joint includes an outer joint member having three track grooves each including roller guide surfaces opposing each other in a circumferential direction of each of the track grooves, a tripod member including three leg shafts, and roller units each including a roller and an inner ring to support the roller. An outer peripheral surface of the roller has a partially spherical surface having a curvature center on an axis of each of the leg shafts. The roller guide surfaces are each formed of a partially cylindrical surface having a curvature center on a horizontal line passing an intersection of a pitch circle of the track grooves and a center line of each of the track grooves, and when no torque is applied to the joint, an end portion of the outer peripheral surface of the roller abuts against the roller guide surfaces.

The invention relates to a transmission shaft retainer inner sphere diameter detector, in particular to a retainer inner sphere diameter detector for a fixed end joint and a movable end joint of a car constant velocity universal joint transmission shaft, which comprises a support, a rotating shaft A, a rotating shaft B and a positioner, a measuring rod A is rotatably connected to the rotating shaft A, the measuring rod A is perpendicular to and fixedly connected with a measuring head A, a measuring rod B is rotatably connected to the rotating shaft B, and the measuring rod B is perpendicular to and fixedly connected with a measuring head B; a gauge rod of the dial gauge and the measuring rod B are fastened through a screw, a contact on the dial gauge makes contact with the end face of a screw installed on the measuring rod A, one end of the bolt penetrates through the measuring rod A and is in spiral connection with the measuring rod B, the spring is sleeved on the bolt, the positioner is provided with a spherical groove, a square notch, a groove opening A and a groove opening B, the square notch is opposite to a reamed hole in the working table plate, the measuring head A is opposite to the groove opening A, and the groove opening B is opposite to the groove opening B. And the measuring head B is opposite to the groove opening B. When the detector is used for measuring the inner ball diameter of the retainer, not only is the measurement convenient, but also the detection precision of the inner ball diameter of the retainer can be ensured.

The utility model provides a multi-raceway constant velocity joint assembly. The tripod mainly solves the problem that an outer ball ring of a tripod of an existing constant velocity universal joint is a one-section type complete arc-shaped surface to achieve sliding fit with a channel of the inner wall of a shell, and stability is not high. The ball bearing is characterized by further comprising a plurality of ribs (31) which are arranged on the circumferential outer wall of the outer ball ring and distributed in the radial direction of the outer ball ring. And the slideways (11) are arranged on the inner wall of the shell, correspond to the convex edges one by one and are in sliding fit with the convex edges. According to the multi-raceway constant velocity universal joint assembly, more stable transmission performance can be provided through the multiple raceways, vibration and noise in the movement process are reduced, and the driving comfort is improved.

A valve train method for a dual-lift camshaft in a range-extending engine belongs to the field of automotive engine technology. The invention includes the following steps: Cam profile design: designing the cam profile of the camshaft, wherein the cam buffer section adopts a constant acceleration-constant velocity profile, and the cam working section adopts a high-power polynomial cam profile design method to design the first cam profile and the second cam profile respectively; Cam profile correction: using a cam profile dynamic correction method, obtaining the final first target cam profile and the second target cam profile used for machining the camshaft; Operating condition selection and valve drive: selecting the engine's operating point, and driving the valves to open and close according to the corresponding valve motion law through a rocker arm valve train mechanism to achieve valve train operation. This invention can solve the technical problems of existing fixed-lift camshafts in range-extending engines, which cannot simultaneously meet the requirements of economic operating conditions and rated operating conditions, as well as poor NVH performance and high mechanical losses.

A grease composition for outboard constant velocity joints includes (a) a diurea-based thickener and (b) a base oil containing a synthetic oil and having a kinematic viscosity at a temperature of −20° C. measured according to JIS K 2283 of 3.000 to 20.000 mm2 / s.

The invention relates to the technical field of pipeline cleaning flow meters, and particularly discloses a constant-speed pipe flow meter with a self-cleaning function and a working method.The constant-speed pipe flow meter comprises an H-shaped blowing guide pipe assembly, the H-shaped blowing guide pipe assembly comprises a steam pipeline and a nitrogen pipeline, a communicating pipe is connected between the steam pipeline and the nitrogen pipeline, one end of the steam pipeline is connected with a second pressure guide pipe, and the other end of the steam pipeline is connected with a third pressure guide pipe; one end of the nitrogen pipeline is connected with the pressure guide pipe I, and the other end of the nitrogen pipeline is connected with an external nitrogen supply pump; on-off of steam and nitrogen is controlled through the steam valve F3 and the nitrogen valve F4, and online purging and cleaning of the interior of the flowmeter are achieved; according to the medium impurity content in actual production, purging operation is conducted regularly, three modes of steam purging, nitrogen purging and combined purging are provided, it is ensured that the flow meter achieves the self-cleaning function under the conditions that production is not stopped and gas is not stopped, blockage is effectively prevented and cleaned, and the accuracy of flow measurement is ensured.

Provided is a gripping method including: a phase matching step of matching tool relief grooves of a contact metal member and track grooves of a constant velocity universal joint component with each other in phase; a measuring step of measuring phase differences between the track grooves of the constant velocity universal joint component and a female spline of the constant velocity universal joint component; a matching step of matching, based on a result of the measuring step, a stopper with a recessed portion of the female spline having the smallest phase difference and gripping the constant velocity universal joint component by a collet chuck. Under a state in which the constant velocity universal joint component is gripped by the collet chuck, the contact metal member holds the constant velocity universal joint component.

The utility model discloses a long-life constant velocity universal joint. The problem that scrap iron exists in an inner cavity of a conventional constant velocity universal joint and influences use is mainly solved. The mounting piece (4) is detachably connected with the outer wall of the shell, and a magnetic attraction part (41) is arranged on the mounting piece arranged in the inner cavity. The utility model provides a long-service-life constant velocity universal joint. The service life is prolonged by adsorbing scrap iron in a shell through a magnetic attraction part at one end of an installation piece.