250 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.

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.

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.

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 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 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.

To provide a torque transmission device in which the degree of freedom of a shaft processing system corresponding to a non-disassembly type coming-off prevention structure is enhanced.SOLUTION: The torque transmission device 2 includes a shaft 19 having a male spline 21, an inner joint member 12 having a female spline 22 and coupled to the shaft 19 in a torque transmittable manner by fitting of the male spline 21 and the female spline 22, and a retaining ring 24 housed in an annular recessed groove 23 formed in the shaft 19. The retaining ring 24 comes into contact with an end surface 22a of the female spline 22 and a side surface 23a of the annular recessed groove 23 on the shaft tip side, so that the shaft 19 is prevented from coming off. The 22a of the end face of the female spline 22 is expanded toward the tip side of the shaft. A groove bottom surface 23c of the annular recessed groove 23 is inclined so as to be diametrically expanded toward the shaft tip side.SELECTED DRAWING: Figure 2

To stabilize the quality and strength of an outside joint member in which a shaft part and a cup part are joined with frictional welding.SOLUTION: An outside joint member 11 comprises a cup part 12 an inner periphery of which is provided with a track groove for engaging with a roller 19, and a shaft part 13 joined to the cup part 12. The cup part 12 has a bottomed cylindrical shape with one open end, and comprises a cylindrical part, a bottom part, and a solid short shaft part 31 protruding from the bottom part. A solid part 32 is formed at one end of the shaft part 13. The short shaft part 31 of the cup part 12 and the solid part of the shaft part 13 are joined by friction welding. The core hardness of a joint part between the short shaft part 31 of the cup part 12 and the solid part of the shaft part 13 is set to an average core hardness of Hv350 or less and a maximum core hardness of Hv390 or less.SELECTED DRAWING: Figure 4

The utility model discloses a low-noise and high-durability constant velocity universal joint for new energy. The constant velocity universal joint tripod mainly solves the problem that friction force between an existing constant velocity universal joint tripod and an inner ball ring is large. The bearing frame is characterized in that a shaft neck (21) is arranged on the frame body, an inner ball ring (22) is arranged on the shaft neck in a sleeved mode, and a plurality of open grooves (211) used for storing grease are formed in the circumferential outer wall of the shaft neck. According to the low-noise and high-durability constant velocity universal joint for the new energy, the capacity of lubricating grease in the contact area of the three-pin frame and the inner ball ring is increased, the friction coefficient of the three-pin frame and the inner ball ring is reduced, the friction force is reduced, the friction force between the inner ball ring and a three-pin shell sliding groove is reduced, and the service life is prolonged.

The utility model provides a universal joint structure, constant velocity drive axle and vehicle, the universal joint structure includes: inner ring and outer ring, outer ring is sleeved outside the inner ring, and the rolling structure is provided between inner ring and outer ring to make outer ring can rotate relative to inner ring; the sliding sleeve is arranged on the inner side of the inner ring and used for being connected with a transmission shaft; and the sliding structure is arranged between the inner ring and the sliding sleeve, and the sliding structure can enable the inner ring and the sliding sleeve to relatively slide in the axial direction. Circumferential rotation between the inner ring and the outer ring is achieved through the rolling structure, namely swing angle adjustment is achieved, and meanwhile the sliding sleeve and the inner ring can be subjected to position adjustment in the axial direction through the sliding structure. Therefore, the universal joint structure can achieve large-amplitude swing adjustment and axial adjustment at the same time, and meanwhile appearance envelope is not increased.

The present invention provides a hub assembly for a wheel bearing device and a constant velocity universal joint that can suppress slippage such as stick-slip and can be easily manufactured. [Solution] This hub assembly 41 connects a wheel bearing device 1 and a constant velocity universal joint 21 in a way that enables power transmission. An inner ring 4 is press-fitted onto the outer circumference of a hub ring 3 from the inboard side, and an annular connecting member 14 is fitted onto the outer circumference of the hub ring 3 with the inner ring 4 in axial contact with its inboard side. The inner ring 4 and the connecting member 14 are clamped and fixed to the hub ring 3 by the radially outward plastic deformation of the inboard end of the hub ring 3, and the outer joint member 22 of the constant velocity universal joint 21 and the connecting member 14 are connected to each other by serration fitting.

[Problem] The purpose of the present invention is to provide a differential restriction device capable of suppressing relative rotation of a pair of output rotation members of a differential device and suppressing an increase in the length of a rod portion of a coupling member connected to one of the output rotation members. [Solution] A differential device (11) has a differential case (112) and a pair of side gears (115, 116), and a differential restriction device (10) suppresses relative rotation of the pair of side gears (115, 116). A differential restriction device (10) is provided with: a joint member (910) of a constant velocity universal joint (91) connected to one side gear (116) so as not to rotate relative thereto; a clutch mechanism (2) having a clutch (20) that suppresses relative rotation between the joint member (910) and the differential case (112); and an operation mechanism (3) for operating the clutch mechanism (2). The coupling member (910) has a cup part (911) formed in a bottomed cylindrical shape and a shaft-shaped rod part (912) connected to the half axle gear (116), and a clutch (20) is disposed on the outer periphery of the cup part (912).

The utility model relates to the technical field of automobile steering systems, and discloses a constant velocity universal joint steering column capable of automatically eliminating a gap, which comprises an intermediate shaft and a bell-shaped shell, the two side ends of the intermediate shaft are connected with star-shaped sleeves through spline structures, the intermediate shaft is rotatably connected with an inner cavity of the bell-shaped shell through the star-shaped sleeves, and the inner cavity of the bell-shaped shell is connected with the star-shaped sleeves. A plurality of large steel balls are arranged between the star-shaped sleeve and the bell-shaped shell, the star-shaped sleeve is in rolling fit with the bell-shaped shell through the large steel balls, a retainer is further arranged between the star-shaped sleeve and the bell-shaped shell, and the large steel balls roll in an inner raceway of the bell-shaped shell and an outer raceway of the star-shaped sleeve, so that the star-shaped sleeve is matched with the star-shaped sleeve. The position between the upper shaft and the middle shaft is automatically adjusted, constant-speed steering is achieved, torque fluctuation is reduced, the two side ends of the middle shaft can abut against the arc-shaped covers all the time through the small steel balls, and therefore contact gaps between the two ends of the middle shaft and the bell housing are eliminated, the NVH performance of a product is improved, and the service life of the product is prolonged.

The utility model discloses a composite armored semi-rigid dust cover for an automobile constant velocity universal joint. The universal joint dust cover mainly solves the problem that the universal joint dust cover is poor in physical damage resistance. The protective cover is characterized in that a protective layer (2) made of metal is connected with the hoop and arranged on the circumferential outer side of the cover body; and the surface coating (3) is arranged on the outer wall of the cover body and is used for reflecting infrared rays. The utility model provides a composite armored semi-rigid dust cover for a constant velocity universal joint of an automobile, which is provided with a protective layer made of metal to prevent flying stones on a road surface and prevent the dust cover from being broken down; and the ceramic-based reflecting coating is sprayed on the surface, so that the infrared wave band is mainly prevented, the infrared radiation absorption rate of the cover body is reduced by 40% to the maximum, and the cover body failure caused by excessive heat absorption of the cover body is avoided.