23 results about "Constant velocity" patented technology

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.

The utility model discloses a kind of lightweight constant velocity universal joint star-shaped sleeve, including star-shaped sleeve main body, eight outer raceways are equidistantly arranged on the circumference of star-shaped sleeve main body, and the position between center hole and adjacent two outer raceways on star-shaped sleeve main body is provided with the weight-reducing through hole parallel to axis;Outer raceway is close to center position and is provided with multiple axial shallow grooves along outer raceway direction.The utility model can not only reduce the weight of star-shaped sleeve main body by increasing the number of outer raceway, but also improve steering and power transmission accuracy by increasing the number of matching steel ball, star-shaped sleeve is mainly circumferentially stressed, and the axial weight-reducing through hole is arranged on star-shaped sleeve main body, axial shallow groove and flow guide groove are arranged in outer raceway, and weight-reducing axial groove and weight-reducing circumferential groove are arranged on circumference, which will not affect normal stress and structural strength when star-shaped sleeve main body works, to achieve the purpose of lightweight design.

A constant velocity coupling is provided to achieve an increased cross angle. Multiple rolling grooves (11, 7) are formed on the outer ring (5) and the inner ring (6), respectively. Multiple balls (1) that are disposed in the rolling grooves (11, 7) and transmit torque are held by an isolation ring (12). The outer ring (5) is composed of a cylindrical outer shell (8) and an annular inner shell (9) that is movable along the axial direction of the outer shell (8) and bound in the circumferential direction inside the outer shell (8). The inner shell (9) has multiple sliding pieces (10) that are divided in the circumferential direction corresponding to the balls (1) and have rolling grooves (11) formed on their inner surfaces. The constant velocity coupling also includes: a pressing plate (13) disposed inside the outer shell (8) and pressed on the ends of the multiple sliding pieces (10) by an elastic member (14); and a receiving plate (15) provided on the second rotating member (4) in a radially outward state and abutting against the multiple sliding pieces (10).

In a constant velocity universal joint in which an internal joint member and a shaft are assembled with a twist angle provided on one of the male and female splines, the invention facilitates the intervention of a lubricant between the tooth surfaces of the male and female splines. [Solution] In constant velocity universal joints 2 and 3, in which the internal joint members 5 and 9 and the shaft 13 are assembled with a twist angle θ provided on one of the male and female splines 14 and 15, a recess 18 is formed on at least one of the tooth root surface 14ac of the female spline 14 and the tooth tip surface 15ab of the male spline 15. As a result, when torque is applied to the constant velocity universal joints 2 and 3, the recess 18, which functions as a lubricant reservoir, makes it easier for lubricant to spread between the tooth surfaces 14aa and 15aa of the male and female splines 14 and 15, and facilitates the intervention of lubricant between the tooth surfaces 14aa and 15aa.

Vehicles, wheel assemblies for vehicles, and methods for suppressing noise from vehicles are provided. A wheel assembly for a vehicle includes a knuckle; a wheel hub configured to rotate within the knuckle, the wheel hub extending from a proximal end to a distal end, wherein the distal end is configured for engaging a wheel; a constant velocity (CV) joint configured for transferring torque from power plant to the wheel hub, wherein the CV joint has an outer surface including a shoulder; a recess formed between the proximal end of the wheel hub and the shoulder of the CV joint; and a noise-canceling washer positioned in the recess, wherein the noise-canceling washer abuts the proximal end of the wheel hub and the shoulder of the CV joint.

The application provides a high-low temperature environment endurance test bench and test method for a constant velocity joint sealing cover, three pairs of clamping sleeves are used to clamp three input shafts and output shafts of the constant velocity joints respectively on the left side and the right side, the temperature of a high-low temperature box is adjusted according to requirements during the test, a large swing mechanism and a small swing mechanism drive the input shaft and the output shaft to swing respectively at a required angle and frequency, a rotating mechanism drives the constant velocity joint to rotate at a required rotating speed, the offset of the rotating center of the telescopic ball cage type constant velocity joint on the input shaft side is adjusted, the input shaft can be relatively moved with the cylindrical shell, for different specifications of the constant velocity joints, only the matched clamping sleeves need to be replaced, the loading mechanism is connected to the right end of the right rotating shaft of the rotating mechanism, the comprehensive performance test of the constant velocity joint can be conducted, the test bench can simulate the working condition of the real vehicle, the high-low temperature environment endurance test of multiple constant velocity joint sealing covers can be conducted, the high-low temperature box has less openings, the high and low temperatures can be adjusted more effectively, the operation is convenient, and the adaptability is strong.

A plunging type constant velocity universal joint has six torque transmission balls, and a curvature center of a spherical outer peripheral surface and a curvature center of a spherical inner peripheral surface of a cage are offset toward opposite sides in an axial direction with respect to a joint center. The plunging type constant velocity universal joint is used at a normal operating angle of from 8° to 12°. A ratio DBALL / DSPCD of a diameter (DBALL) of the torque transmission ball to a spline pitch circle diameter (DSPCD) of a coupling hole of an inner joint member is within a range of 0.80 to 0.86. A contact angle of the torque transmission ball and a linear track groove is within a range of 32° to 35°. A contact ratio of the torque transmission ball and the linear track groove is within a range of 1.05 to 1.08.

A high-life ball-cage constant velocity drive shaft for new energy applications. Its features include: an oil reservoir (212) located within the housing and communicating with the bottom of the raceway; and an auxiliary groove (213) extending along the circumferential inner wall of the housing to connect several of the raceways. This primarily addresses the problem that traditional ball-cage constant velocity drive shafts cannot meet the increased grease requirements of high-torque ball cages. This invention provides a high-life ball-cage constant velocity drive shaft for new energy applications, incorporating an oil reservoir within the ball raceway of the bell-shaped housing and adding a compensating annular auxiliary groove in the inner spherical region. This ensures structural strength while replenishing grease, thereby increasing service life.

The application discloses a kind of whole vehicle acceleration maximum lateral shaking evaluation methods, it is through the dispersion of the vehicle posture between different vehicles, determine the maximum angle of the transmission shaft of measured vehicle, ensure that 99.7% vehicle transmission shaft angle < maximum angle;By whole left and right transmission shaft phase difference, make transmission shaft axial derived force maximum.Due to the widespread application of constant velocity universal joint drive shaft, vehicle acceleration driving is prone to lateral shaking, and the size of whole vehicle lateral shaking and the selection of transmission shaft knuckle type, the size of transmission shaft angle, the change of left and right transmission shaft working state and whole vehicle parameter are related.The parameters related to lateral shaking are prone to change when whole vehicle accelerates and drives, so there is great fluctuation in whole vehicle acceleration lateral shaking, and the whole vehicle maximum lateral shaking is determined by the whole vehicle acceleration maximum lateral shaking evaluation method, which has important guiding significance for vehicle design.

A method for fixing a boot of a constant velocity universal joint includes fitting the boot to an outer periphery of an outer joint member, causing a boot band to circle around an outer periphery of the boot, and fastening the boot by reducing a diameter of the boot band. A portion of the boot band to which a pressing force in an inner diameter direction is applied when the diameter of the boot band is reduced is arranged in a circumferential region of a thin portion of the boot.

The utility model discloses a kind of power transmission and steering connecting structure of tractor transport unit, including traction outer frame, traction inner frame, fork type drawbar, double ball cage constant velocity universal joint, transmission shaft, drawbar sleeve, double cross universal joint, transmission assembly and transmission shaft universal joint, fork type drawbar includes fork type end and drawbar, the traction outer frame is hinged with traction inner frame, and is connected with tractor head's transmission case, the traction inner frame is hinged with the fork type end of fork type drawbar, double ball cage constant velocity universal joint is installed in the cavity formed by traction inner frame and fork type end, between the transmission shaft and transmission assembly is connected by double cross universal joint. The utility model passes through using double ball cage constant velocity universal joint, can make tractor group more safe when turning angle is larger;By increasing shift mechanism, tractor group can have greater driving force.

The prevent invention proposes to provide a method for manufacturing a constant velocity drive shaft, which can manufacture especially a constant velocity drive shaft among other drive shafts with efficiency and stable high accuracy. The method for manufacturing a constant velocity drive shaft using a closed cold forging device having a plurality of mold pairs structured with an upper mold and a lower mold, comprises a first process for processing a forming material for forming the constant velocity drive shaft to form a first forming material having first large diameter portions by applying a pressure from a first upper mold of a first mold pair and pressures from both sides of the forming material, a second process for forming a second forming material having second large diameter portions by applying a pressure from a second upper mold of a second mold pair and pressures from both sides of the first forming material with respect to the first forming material being mold-processed in the first process, and a third process for forming third large diameter portions by applying a pressure from a third upper mold of a third mold pair and pressures from both sides of the second forming material with respect to the second forming material being mold-processed in the second process.

A ball-type constant velocity universal joint is disclosed, comprising an inner race including a plurality of first peripheral grooves formed therein; an inner cage race including a plurality of second peripheral grooves and a plurality of first grooves formed therein and surrounding the inner race; an intermediate cage race including a plurality of first inner peripheral grooves, a plurality of third peripheral grooves and a plurality of second grooves formed therein and surrounding the inner cage race; an outer cage race including a plurality of second inner peripheral grooves and a plurality of third grooves formed therein and surrounding the intermediate cage race; and an outer race including a plurality of third inner peripheral grooves formed therein and surrounding the outer cage race; and a plurality of first balls, a plurality of second balls and a plurality of third balls respectively disposed between the plurality of corresponding outer peripheral grooves and the plurality of corresponding inner peripheral grooves to constrain the plurality of first balls, a plurality of second balls and a plurality of third balls by the plurality of corresponding grooves, each groove having an arcuate bottom surface, each pair of grooves for the track of a corresponding one of the plurality of balls, and inclined relative to each other in opposite directions.

This utility model discloses an automatic hydraulic chuck jaw trimmer. The automatic jaw trimmer includes a jaw trimmer main seat, which has a hollow cylindrical part and an outer end cap at one end of the hollow cylindrical part. An inner plug is connected to the other end of the hollow cylindrical part. A main drive component is provided inside the jaw trimmer main seat. The inner end face of the turntable of the main drive component has a spiral groove in the shape of a constant velocity helix. Several driven components that mesh with the spiral groove and can move radially are provided in the space between the inner end face of the turntable and the inner end face of the inner plug. A first through hole is opened on the side wall of the hollow cylindrical part of the jaw trimmer main seat for the driven components to pass through. This utility model has a simple structure, is very convenient to adjust and operate, and the jaw trimmer does not need to be disassembled, enabling fast and efficient jaw trimming. At the same time, the jaw trimmer has a built-in plug, which isolates the inside and outside, and can replace the plug installed at the end of the existing spindle to prevent metal debris from falling into the spindle. It achieves multiple functions in one and saves usage and maintenance costs.

A drive assembly for an adapter assembly of a surgical device includes an input shaft, a middle shaft, and an output shaft. The input shaft includes a proximal portion configured for operable engagement with a drive member of a handle assembly and a distal portion including a first castellated portion. The middle shaft includes a proximal portion having a first lobed portion in operable engagement with the first castellated portion of the input shaft, and a distal portion having a second lobed portion. The output shaft includes a proximal portion having a second castellated portion in operable engagement with the second lobed portion.

The utility model provides a high performance axle rod double -slip constant velocity drive shaft assembly, mainly solves the problem of the complicated structure of the double -slip drive shaft assembly of current cage, ball etc. Its characterized in that: the intermediate shaft includes the pipe body (11), is equipped with two mutually isolated cavities (12) inside, is equipped with first drive key in the cavity, first half shaft (13), one end of the first half shaft (13) is inserted into one cavity and is slidably connected with the cavity and is equipped with second drive key (131) for transmitting torque with the first drive key cooperation, and the other end is matched with the first universal joint, second half shaft (14), one end of the second half shaft (14) is inserted into one cavity and is slidably connected with the cavity and is equipped with third drive key for transmitting torque with the first drive key cooperation, and the other end is matched with the second universal joint, the utility model provides a high performance axle rod double -slip constant velocity drive shaft assembly, adopts the key drive to realize the slip and the torque transmission, and adopts two -segment type dust cover, prevents the grease leakage.

To provide a wheel bearing device that can suppress the generation of abnormal noise while keeping the increase in weight to a minimum. [Solution] A recess 3h extending along the axial direction is formed on the inner circumferential surface of the shaft hole 3e in the hub ring 3 of the wheel bearing device 1, and a protrusion 28 extending along the axial direction and spline fitting with the recess 3h is formed on the outer circumferential surface of the stem portion 27 of the constant velocity universal joint 20, and the ratio of the axial distance E between the flange surface 3j of the wheel mounting flange 3 and the inner end surface 4b of the inner ring 4 to the pitch circle diameter D of the balls 8 constituting the inner ball row 5 and the outer ball row 6 is 0.8 ≤ (E / D) ≤ 0.94.

The constant velocity ball joint comprises an inner raceway with first outer circumferential grooves, an inner cage raceway with second outer circumferential grooves and first slots, which encloses the inner raceway, a middle cage raceway with first inner circumferential grooves, third outer circumferential grooves and second slots, wherein the middle cage raceway encloses the inner cage raceway, an outer cage raceway with second inner circumferential grooves and third slots, which encloses the middle cage raceway, an outer raceway with inner circumferential grooves, which encloses the outer cage raceway, a plurality of first balls, each arranged between the first outer circumferential grooves and the first inner circumferential grooves, a plurality of second balls, each arranged between the outer circumferential grooves and the second inner circumferential grooves, and a plurality of third balls.which are arranged between the third outer circumferential grooves and the third inner circumferential grooves. Each of the grooves has an arcuate base surface in the longitudinal section of the constant velocity joint, and each pair of grooves, which forms a raceway for one of the multiple balls, is inclined at a predetermined angle in the opposite direction with respect to a central axis of the constant velocity joint.

This utility model discloses a novel constant velocity universal joint retainer, comprising a retainer body. Eight circular windows, penetrating both internally and externally, are equidistantly arranged on the circumference of the retainer body. Wavy protrusions are equidistantly arranged on the inner wall of each circular window, and a grid-like reinforcing rib is uniformly arranged on the outer wall of the retainer body. This utility model utilizes circular windows, whose shape differs from rectangular or rounded rectangular windows, to reduce stress concentration during use. The wavy protrusions within the circular windows increase contact with the mounting steel balls, preventing localized stress. Increasing the number of circular windows distributes the stress across each window location. Furthermore, the retainer body employs a design with increased wall thickness in the middle and additional grid-like reinforcing ribs on the outside, increasing overall structural strength. This achieves stress dispersion and improved structural strength, reducing the probability of damage and extending service life.