171 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 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.

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.

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

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.

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.

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.

The invention provides a parallel bionic dexterous wrist structure and a bionic robot, the wrist structure comprises an arm end unit, a palm end unit, a constant velocity universal joint and a parallel joint driving unit, and the arm end unit is used for connecting a forearm of the bionic robot; the palm end unit is used for connecting a palm of the bionic robot; the constant velocity universal joint is connected between the arm end unit and the palm end unit; one end of the parallel joint driving unit is connected to the arm end unit, the other end of the parallel joint driving unit is connected to the palm end unit, and the parallel joint driving unit is used for driving the palm end unit to bend, stretch and deviate from the ulnar radius relative to the arm end unit, so that flexible posture adjustment of the palm is achieved. The flexible movement functionality of the wrist structure is considered, the reliability of the transmission process and the stability of the driving operation process are enhanced, the flexible movement of a human hand can be accurately simulated by the dexterous wrist structure, and therefore the performance of a robot mechanical arm is greatly improved.

The utility model relates to a clamping device for grinding an outer shape surface of a transmission shaft retainer in a car constant velocity universal joint, which comprises a connecting plate, a magnetizer, a machine tool body, a main shaft of a machine tool, a clamping assembly A and a clamping assembly B. The connecting plate is fixedly connected with the machine tool body, an arc notch is arranged on the connecting plate, the magnetizer is positioned in the arc notch, the magnetizer is fixedly connected with the main shaft of the machine tool, and the clamping assembly A and the clamping assembly B are arranged on the connecting plate. The clamping assembly A comprises a supporting rod A, a screw D, a rotating shaft A, a supporting head A and an alloy block A. The clamping assembly B comprises a supporting rod B, a screw C, a rotating shaft B, a supporting head B and an alloy block B. The supporting head A and the supporting head B rotate around the rotating shaft A and the rotating shaft B on the supporting rod A and the supporting rod B correspondingly, so that the alloy block A and the alloy block B make full contact with the appearance face of the retainer. The grinding precision of the retainer is ensured, meanwhile, it is ensured that the grinding device is convenient to adjust, and the grinding precision and working efficiency are improved.

This linear motor reduces costs by decreasing the amount of permanent magnets used for driving, while enabling stable, highly efficient, long-distance transport. [Solution] The linear motor 100 comprises a movable element 20 having an armature and a stator 10. In the track of the movable element 20, the magnetic flux density generated in the acceleration section S1 is greater than the magnetic flux density generated in the constant velocity section S3, and a transition section S2 is provided in which the magnetic flux density gradually decreases from the acceleration section S1 to the constant velocity section S3.

An attachment structure for a boot is configured in such a manner that an annular projection (26) provided on the inner peripheral surface of a large-diameter cylindrical section (21) (fixing section (A)) of a boot (20) is fitted into a first annular groove (8) provided on the outer peripheral surface (6a) of a boot-to-be-fixed section (B) of an outer joint member (2), and the first annular groove (8) is formed in the outer peripheral surface (6a) of the boot-to-be-fixed section (B) of the outer joint member (2). Annular protrusions (10) provided on both sides in the axial direction of the first annular groove (8) are pressed against the inner peripheral surface of the fixing part (A), and are fastened to the outer peripheral surface of the fixing part (A) by a protective cover tape (24), thereby attaching and fixing the fixing part (A) to the protective cover fixed part (B). The outer peripheral surface of the fixed part (B) of the protective cover is provided with support parts (11) which contact and support the inner peripheral surface (21a) of the fixed part (A) outside the band width range of the protective cover band (24), and the support parts (11) are arranged on two axial sides of the protective cover band (24).

An active wheel carrier system and method are provided. The active wheel carrier system includes, in one example, a constant velocity (CV) joint, a wheel hub coupled to the CV joint and including a set of hub bearings, a hub carrier inner race coupled to the set of bearings, a hub carrier outer race, multiple roller elements interposed between the hub carrier inner race and the hub carrier outer race, a control swivel coupled to the hub carrier inner race, a camber-angle drive configured to independently rotate the hub carrier inner race about a first axis, and a toe-angle drive configured to independently rotate the hub carrier inner race about a second axis that is distinct from the first axis.

This hub assembly 41 includes a bearing device 1 for wheel and a constant velocity universal joint 21 which are mutually joined through a screw member 44 having external thread parts 42, 43 at both ends. When being inserted into a through-hole 16 axially penetrating an inner member 12, the screw member 44 has the external thread part 42 on one end that is screwed into an internal thread hole 46 at a bottom part 27 of an outer joint member 22, and the external thread part 43 on the other end, to which a nut 45 is attached so as to clamp the inner member 12 by the nut 45 and the outer joint member 22.

The application provides a multi-mode robot shoulder joint mechanism, comprising a shaft base, a first joint module, a second joint module, a third joint module, a constant velocity universal joint and a terminal output flange. The first joint module and the third joint module are coaxially arranged on the shaft base; the first joint module is provided with a hollow hole penetrating along an axis, and the output end of the third joint module is fixedly connected with a third joint module output torque shaft, the third joint module output torque shaft is fixedly connected with the constant velocity universal joint after penetrating through the hollow hole of the first joint module, and the constant velocity universal joint is connected with the terminal output flange; the first joint module drives the terminal output flange to rotate around an X axis, the second joint module drives the terminal output flange to rotate around a Y axis, and the third joint module drives the terminal output flange to rotate around a Z axis through the constant velocity universal joint. The application has a compact structure, achieves the lightweight overall target, and reduces the torque and inertia of the related load motor.

The invention provides a spline-free welding type tripod structure and an assembling method thereof, and belongs to the technical field of automobile parts, the tripod structure is used for a tripod type constant velocity universal joint, the tripod structure comprises a tripod with a handle, one end of the tripod is provided with a welding end face, and the other end of the tripod is provided with three journals evenly distributed in the circumferential direction; the bearing assembly comprises a first bearing, a second bearing and a third bearing which are respectively pressed on the journals; the tripod with the handle is fixedly connected with a middle shaft rod of the constant-speed driving shaft through the welding end face, and the spline-free welding type tripod structure does not comprise a check ring used for axial limiting. By simplifying the structure, canceling retainer ring and spline processing and adopting friction welding and center hole weight reduction design, the transmission performance is ensured, and meanwhile, the manufacturing cost, the assembly complexity and the product weight are remarkably reduced.