US20050049052A1 - Longitudinal plunging unit - Google Patents
Longitudinal plunging unit Download PDFInfo
- Publication number
- US20050049052A1 US20050049052A1 US10/911,070 US91107004A US2005049052A1 US 20050049052 A1 US20050049052 A1 US 20050049052A1 US 91107004 A US91107004 A US 91107004A US 2005049052 A1 US2005049052 A1 US 2005049052A1
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- US
- United States
- Prior art keywords
- profiled
- sleeve
- balls
- journal
- ball grooves
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000005096 rolling process Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
- F16D3/06—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow axial displacement
- F16D3/065—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow axial displacement by means of rolling elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/02—Shafts; Axles
- F16C3/03—Shafts; Axles telescopic
- F16C3/035—Shafts; Axles telescopic with built-in bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
- F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
- F16D3/843—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers
- F16D3/845—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers allowing relative movement of joint parts due to the flexing of the cover
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
- F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
- F16D2003/22306—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts having counter tracks, i.e. ball track surfaces which diverge in opposite directions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
- F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
- F16D2003/22323—Attachments to the shaft of the inner joint member whereby the attachments are distanced from the core
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S464/00—Rotary shafts, gudgeons, housings, and flexible couplings for rotary shafts
- Y10S464/904—Homokinetic coupling
- Y10S464/906—Torque transmitted via radially spaced balls
Definitions
- the present invention relates to a longitudinal plunging unit for a driveshaft assembly.
- the invention relates to a longitudinal plunging unit for a shaft assembly used for torque transmitting purposes.
- plunging units include a profiled sleeve with circumferentially distributed, longitudinally extending first ball grooves, a profiled journal with circumferentially distributed, longitudinally extending second ball grooves, balls which are arranged in groups of balls in pairs of first and second ball grooves, and a ball cage which is positioned between the profiled sleeve and the profiled journal and which axially fixes the balls in their positions relative to one another.
- EP 0 189 011 A proposes a further longitudinal plunging unit of the foregoing type for torque transmitting purposes. Freedom from play in the direction of rotation is achieved in that at least one ball or roller comprises an excess dimension relative to the grooves and includes a resilient material that is fitted under pretension.
- the balls When, under torque, the profiled sleeve is displaced relative to the profiled journal, the balls roll in the inner and outer ball grooves in a way which is substantially free of sliding friction.
- the balls and the ball cage with all its balls cover half the relative displacement path between the two elements, and permit the change in length of the longitudinal plunging unit in a low-friction way.
- axial stops for the ball cage or for the balls are provided in the profiled sleeve or on the profiled journal.
- the ball cage should, if possible, not reach the axial stops, but, in accordance with the specified design, it should be freely displaceable, thus avoiding any sliding friction of the balls in the grooves.
- Assemblies of this type are used in torque transmitting shafts, such as driveshafts. They are used for the purpose of compensating for tolerances of the distance between the connecting parts during assembly and/or for compensating for changes in the distance between the connecting parts, such as joints. These assemblies require low-friction plunging conditions during operation.
- the basic design of such longitudinal plunging units is known. During operation, they are subject to a problem in that, during the specified transmission of torque, there necessarily occurs torsion at the inter-engaging portions of the profiled sleeve and of the profiled journal in the region of the ball grooves.
- the balls of the units positioned in the longitudinal direction at the ends are subjected to the highest loads due to the greatest differences in torsion occurring in those regions. In consequence, there can occur such as damage pittings. This damage occurs at the balls at the ends first, and is the starting point of the failure of the entire unit.
- the profiled sleeve and the profiled journal comprise the same torsional stiffness, such that during the introduction of torque, they are subject to the same angles of torsion.
- the profiled sleeve and the profiled journal comprise the same modulus of transverse elasticity (modulus of rigidity) of the material. They can be made of identical materials, while at the same time they can have the same polar inertia moment.
- This solution constitutes a first measure of reducing, under torque conditions, the torsional differences (angular errors) which, if viewed from the center, increase in the longitudinal direction between the torsion of the profiled sleeve and thus of the outer ball grooves, and the torsion of the profiled journal and thus of the inner ball grooves, in order to ensure that the loads to which the balls are subjected under torque are as uniform as possible.
- a second solution is provided wherein, within the groups of balls, the size of the balls varies in the longitudinal direction.
- the balls positioned centrally in the longitudinal direction have the greatest diameter and the balls positioned at the ends have the smallest diameter.
- the size of the balls decreases linearly from ball to ball from the center outwardly.
- the size of the balls is preferably such that in the torque-free condition of the longitudinal plunging unit, only the central balls are radially pretensioned between the profiled sleeve and the profiled journal.
- FIG. 1 is a longitudinal section through a longitudinal plunging unit for the transmission of torque according to a first embodiment of the present invention.
- FIG. 2 is a longitudinal section through a longitudinal plunging unit according to a second embodiment combined with a constant velocity joint.
- FIG. 1 shows a plunging unit with a profiled sleeve 11 having a constant cross-section which is axially followed by a first conical region 13 , a first tubular region 14 , a second conical region 15 , a second tubular region 16 , a third conical region 17 and a toothed sleeve 18 .
- a profiled journal 21 with a constant cross-section which is formed by a solid journal and which is followed by a cylindrical journal 23 and a toothed journal 24 .
- the profiled sleeve 11 comprises first outer ball grooves 12 .
- the profiled journal 21 comprises second inner ball grooves 22 whose circumferential position corresponds to that of the outer ball grooves 12 .
- the number of outer ball grooves 12 can be a multiple of the number of inner ball grooves 22 .
- the ball grooves associated with one another carry sets of balls 31 , 32 , 33 which are held, so that they cannot be lost, by a sleeve-shaped ball cage 41 in a constant axial arrangement. More than one set of central balls 31 may be included. Likewise, more than one set of intermediate balls 32 and outer balls 33 may be included.
- a sleeve-shaped stop member 42 which engages the profile grooves in a form-fitting and positive way and thus has a sealing effect relative to the tube end towards the right and, at the same time, forms an axial stop to prevent the profiled journal 21 from being inserted any further into the profiled sleeve 11 . It also forms an axial stop for the ball cage 41 .
- a further axial stop for the balls to prevent the ball cage 41 from being extracted from the profiled sleeve 11 is formed by a securing ring 44 inserted into an annular groove 43 in the profiled sleeve.
- FIG. 2 shows a plunging unit having a profiled sleeve 11 with a constant cross-section which is axially followed by a conical region 13 and by a tubular region 14 .
- a profiled journal 21 with a constant cross-section which is formed by a hollow journal and which is followed by a toothed journal 24 .
- the profiled sleeve 11 comprises first outer ball grooves 12 .
- the profiled journal 21 comprises second inner ball grooves 22 whose circumferential position corresponds to that of the outer ball grooves 12 .
- the number of outer ball grooves 12 can be a multiple of the number of the inner ball grooves 22 .
- Ball grooves which are associated with one another carry sets of balls 31 , 32 , 33 which are held, so that they cannot be lost, by a sleeve-shaped ball cage 41 in a constant axial arrangement. More than one set of central balls 31 may be included. Likewise, more than one set of intermediate balls 32 and outer balls 33 may be included.
- a sleeve-shaped stop member 42 which has a sealing effect relative to the tube end towards the right and, at the same time, forms an axial stop to prevent the profiled journal 21 from being inserted any further into the profiled sleeve 11 .
- a first axial stop for the ball cage 41 is formed by a securing ring 46 inserted into an annular groove 45 on the profiled journal 21 .
- a further axial stop for the balls is formed by a securing ring 44 inserted into an annular groove 43 in the profiled sleeve.
- a constant velocity joint 51 is positioned on the toothed journal 24 by way of its inner joint part 53 .
- the outer joint part 52 of the constant velocity joint 51 carries a sleeve 54 which clamps in a rolling boot 61 .
- the other end of the rolling boot 61 is positioned on a sleeve 19 which, in turn, is arranged on the profiled sleeve 11 where it is secured by a clamp band 20 .
- a plug 25 for containing the grease filling of the unit is inserted into the toothed journal 24 .
- the profiled sleeve 11 and the profiled journal 21 comprise the same torsional stiffness. Thus, they are subjected to the same angles of torsion when torque is introduced.
- the central balls 31 have a greater diameter than the intermediate balls 32 , and outer balls 33 positioned towards the ends.
- the ball grooves 12 , 22 in both FIGS. 1 and 2 have a constant cross-section.
Abstract
A longitudinal plunging unit for a shaft assembly used for torque transmitting purposes. The unit includes a profiled sleeve (11) with circumferentially distributed, longitudinally extending first ball grooves (12), a profiled journal (21) with circumferentially distributed, longitudinally extending second ball grooves (22), balls (31, 32, 33) which are arranged in groups of balls in pairs of first and second ball grooves (11, 21), and a ball cage (41) which is positioned between the profiled sleeve (11) and the profiled journal (21) and axially fixes the balls in their positions relative to one another, wherein in the region of the ball grooves (12, 22), the profiled sleeve (11) and the profiled journal (21) include the same torsional stiffness, such that, during the introduction of torque, they are subject to the same angles of torsion.
Description
- The present invention relates to a longitudinal plunging unit for a driveshaft assembly.
- The invention relates to a longitudinal plunging unit for a shaft assembly used for torque transmitting purposes. Such plunging units include a profiled sleeve with circumferentially distributed, longitudinally extending first ball grooves, a profiled journal with circumferentially distributed, longitudinally extending second ball grooves, balls which are arranged in groups of balls in pairs of first and second ball grooves, and a ball cage which is positioned between the profiled sleeve and the profiled journal and which axially fixes the balls in their positions relative to one another.
- From DE 199 52 245 A1, there is known a longitudinal plunging unit or telescopic shaft of the foregoing type wherein hardness distortions are avoided in that the number of the first ball grooves corresponds to a multiple of the number of the second ball grooves and wherein the excess part of the first ball grooves remains free of balls.
- EP 0 189 011 A proposes a further longitudinal plunging unit of the foregoing type for torque transmitting purposes. Freedom from play in the direction of rotation is achieved in that at least one ball or roller comprises an excess dimension relative to the grooves and includes a resilient material that is fitted under pretension.
- When, under torque, the profiled sleeve is displaced relative to the profiled journal, the balls roll in the inner and outer ball grooves in a way which is substantially free of sliding friction. Thus, the balls and the ball cage with all its balls, cover half the relative displacement path between the two elements, and permit the change in length of the longitudinal plunging unit in a low-friction way. At the ends of the displacement path, axial stops for the ball cage or for the balls are provided in the profiled sleeve or on the profiled journal. Under normal operating conditions, the ball cage should, if possible, not reach the axial stops, but, in accordance with the specified design, it should be freely displaceable, thus avoiding any sliding friction of the balls in the grooves.
- Assemblies of this type are used in torque transmitting shafts, such as driveshafts. They are used for the purpose of compensating for tolerances of the distance between the connecting parts during assembly and/or for compensating for changes in the distance between the connecting parts, such as joints. These assemblies require low-friction plunging conditions during operation. The basic design of such longitudinal plunging units is known. During operation, they are subject to a problem in that, during the specified transmission of torque, there necessarily occurs torsion at the inter-engaging portions of the profiled sleeve and of the profiled journal in the region of the ball grooves. As a result, within the groups of balls, the balls of the units positioned in the longitudinal direction at the ends are subjected to the highest loads due to the greatest differences in torsion occurring in those regions. In consequence, there can occur such as damage pittings. This damage occurs at the balls at the ends first, and is the starting point of the failure of the entire unit.
- It is an object of the present invention to provide a longitudinal plunging unit of the foregoing type which has improved running behavior and, thus, a longer service life.
- According to a first solution, in the region of the ball grooves, the profiled sleeve and the profiled journal comprise the same torsional stiffness, such that during the introduction of torque, they are subject to the same angles of torsion. In particular, in the region of the ball grooves, the profiled sleeve and the profiled journal comprise the same modulus of transverse elasticity (modulus of rigidity) of the material. They can be made of identical materials, while at the same time they can have the same polar inertia moment. This solution constitutes a first measure of reducing, under torque conditions, the torsional differences (angular errors) which, if viewed from the center, increase in the longitudinal direction between the torsion of the profiled sleeve and thus of the outer ball grooves, and the torsion of the profiled journal and thus of the inner ball grooves, in order to ensure that the loads to which the balls are subjected under torque are as uniform as possible.
- A second solution is provided wherein, within the groups of balls, the size of the balls varies in the longitudinal direction. The balls positioned centrally in the longitudinal direction have the greatest diameter and the balls positioned at the ends have the smallest diameter. In particular, the size of the balls decreases linearly from ball to ball from the center outwardly. However, it is also contemplated to provide a sub-group of central balls which are identical in size and which are adjoined on both sides by smaller balls. The size of the balls is preferably such that in the torque-free condition of the longitudinal plunging unit, only the central balls are radially pretensioned between the profiled sleeve and the profiled journal. With this solution, it is assumed that, when under the influence of a torsional load, the profiled sleeve and the profiled journal are subjected to increasing torsion starting from their respective free ends. In such a case, the introduction of torque via the balls has not yet much of an effect to the respective connected ends, so that the torsional differences (angular errors) between the two parts are greatest at the respective connected ends which introduce the torque. To ensure that the balls are subjected to a uniform load, in accordance with the invention, the ball size is reduced from the center to the respective ends. Best uniform contact, i.e. uniform ball forces at all balls, should be provided at the torque occurring most frequently in the load spectrum.
- The solutions detailed herein are based on theoretical equations which act as models for tortional behavior of the plunging unit. To that extent, it is particularly advantageous to combine the two solutions.
- Two preferred embodiments of the invention are illustrated in the drawings and will be described below. Other advantages and features of the invention will become apparent upon reading the following detailed description and appended claims, and upon reference to the accompanying drawings.
- For a more complete understanding of this invention, reference should now be made to the embodiments illustrated in greater detail in the accompanying drawings and described below by way of examples of the invention.
- In the drawings:
-
FIG. 1 is a longitudinal section through a longitudinal plunging unit for the transmission of torque according to a first embodiment of the present invention. -
FIG. 2 is a longitudinal section through a longitudinal plunging unit according to a second embodiment combined with a constant velocity joint. -
FIG. 1 shows a plunging unit with a profiledsleeve 11 having a constant cross-section which is axially followed by a firstconical region 13, a firsttubular region 14, a secondconical region 15, a secondtubular region 16, a thirdconical region 17 and atoothed sleeve 18. Into the profiledsleeve 11 there is inserted a profiledjournal 21 with a constant cross-section which is formed by a solid journal and which is followed by acylindrical journal 23 and atoothed journal 24. The profiledsleeve 11 comprises firstouter ball grooves 12. The profiledjournal 21 comprises secondinner ball grooves 22 whose circumferential position corresponds to that of theouter ball grooves 12. However, the number ofouter ball grooves 12 can be a multiple of the number ofinner ball grooves 22. The ball grooves associated with one another carry sets ofballs shaped ball cage 41 in a constant axial arrangement. More than one set ofcentral balls 31 may be included. Likewise, more than one set ofintermediate balls 32 andouter balls 33 may be included. Into the profiledsleeve 11, there is inserted a sleeve-shaped stop member 42 which engages the profile grooves in a form-fitting and positive way and thus has a sealing effect relative to the tube end towards the right and, at the same time, forms an axial stop to prevent the profiledjournal 21 from being inserted any further into the profiledsleeve 11. It also forms an axial stop for theball cage 41. A further axial stop for the balls to prevent theball cage 41 from being extracted from the profiledsleeve 11 is formed by a securingring 44 inserted into anannular groove 43 in the profiled sleeve. -
FIG. 2 shows a plunging unit having a profiledsleeve 11 with a constant cross-section which is axially followed by aconical region 13 and by atubular region 14. Into the profiledsleeve 11 there is inserted a profiledjournal 21 with a constant cross-section which is formed by a hollow journal and which is followed by atoothed journal 24. The profiledsleeve 11 comprises firstouter ball grooves 12. The profiledjournal 21 comprises secondinner ball grooves 22 whose circumferential position corresponds to that of theouter ball grooves 12. However, the number ofouter ball grooves 12 can be a multiple of the number of theinner ball grooves 22. Ball grooves which are associated with one another carry sets ofballs shaped ball cage 41 in a constant axial arrangement. More than one set ofcentral balls 31 may be included. Likewise, more than one set ofintermediate balls 32 andouter balls 33 may be included. Into the profiled sleeve there is inserted a sleeve-shaped stop member 42 which has a sealing effect relative to the tube end towards the right and, at the same time, forms an axial stop to prevent the profiledjournal 21 from being inserted any further into the profiledsleeve 11. A first axial stop for theball cage 41 is formed by a securingring 46 inserted into anannular groove 45 on the profiledjournal 21. A further axial stop for the balls is formed by a securingring 44 inserted into anannular groove 43 in the profiled sleeve. A constant velocity joint 51 is positioned on thetoothed journal 24 by way of its innerjoint part 53. The outerjoint part 52 of the constant velocity joint 51 carries asleeve 54 which clamps in a rollingboot 61. The other end of the rollingboot 61 is positioned on asleeve 19 which, in turn, is arranged on the profiledsleeve 11 where it is secured by aclamp band 20. Aplug 25 for containing the grease filling of the unit is inserted into thetoothed journal 24. - In both of the arrangements shown in
FIGS. 1 and 2 , according to a first embodiment of the invention, in the region of theball grooves sleeve 11 and the profiledjournal 21 comprise the same torsional stiffness. Thus, they are subjected to the same angles of torsion when torque is introduced. According to a second embodiment of the invention, thecentral balls 31 have a greater diameter than theintermediate balls 32, andouter balls 33 positioned towards the ends. Theball grooves FIGS. 1 and 2 have a constant cross-section. When the longitudinal plunging unit is subjected to torsion, higher forces are applied to theintermediate balls 32 andouter balls 33 only after the profiledsleeve 11 and the profiledjournal 21 begin to be subjected to torsion, so that the expected average torque range allballs - From the foregoing, it can be seen that there has been brought to the art a new and improved longitudinal plunging unit. While the invention has been described in connection with one or more embodiments, it should be understood that the invention is not limited to those embodiments. Thus, the invention covers all alternatives, modifications, and equivalents as may be included in the spirit and scope of the appended claims.
Claims (9)
1. A longitudinal plunging unit for a shaft assembly used for torque transmitting purposes, comprising: a profiled sleeve with circumferentially distributed, longitudinally extending first ball grooves; a profiled journal with circumferentially distributed, longitudinally extending second ball grooves; balls which are arranged in groups of balls in pairs of first and second ball grooves; and a ball cage which is positioned between the profiled sleeve and the profiled journal and axially fixes the balls in their positions relative to one another, wherein, in the region of the first and second ball grooves, the profiled sleeve and the profiled journal comprise the same torsional stiffness such that, during the introduction of torque, they are subject to a same angle of torsion.
2. A longitudinal plunging unit according to claim 1 wherein, in the region of the first and second ball grooves, the profiled sleeve and the profiled journal comprise the same polar inertia moment, and each comprise a material having the same modulus of transverse elasticity.
3.-6. (canceled)
7. A longitudinal plunging unit according to claim 1 wherein at an end of the profiled journal which projects from the profiled sleeve, there is arranged a constant velocity ball joint, and a convoluted or rolling boot is secured to an outer part of the constant velocity joint and to the profiled sleeve.
8.-10. (canceled)
11. A longitudinal plunging unit according to claim 7 wherein, in the region of the first and second ball grooves, the profiled sleeve and the profiled journal comprise the same torsional stiffness, such that, during the introduction of torque, they are subject to a same angle of torsion.
12.-14. (canceled)
15. A longitudinal plunging unit for a shaft assembly used for torque transmitting purposes, comprising: a profiled sleeve with circumferentially distributed, longitudinally extending first ball grooves; a profiled journal with circumferentially distributed, longitudinally extending second ball grooves; a sleeve-shaped stop member in the profiled sleeve and providing an axial stop for the profiled journal; balls which are arranged in groups of balls in pairs of first and second ball grooves; and a ball cage which is positioned between the profiled sleeve and the profiled journal and axially fixes the balls in their positions relative to one another, wherein, in the region of the first and second ball grooves, the profiled sleeve and the profiled journal comprise the same torsional stiffness such that, during the introduction of torque, they are subject to a same angle of torsion.
16. A longitudinal plunging unit according to claim 15 , wherein at an end of the profiled journal which projects from the profiled sleeve, there is arranged a constant velocity ball joint, and a convoluted or rolling boot is secured to an outer part of the constant velocity joint and to the profiled sleeve.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/911,070 US20050049052A1 (en) | 2001-07-05 | 2004-08-04 | Longitudinal plunging unit |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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DE10132658.0 | 2001-07-05 | ||
DE10132658A DE10132658C1 (en) | 2001-07-05 | 2001-07-05 | Longitudinal displacement unit |
US10/184,262 US6793583B2 (en) | 2001-07-05 | 2002-06-26 | Longitudinal plunging unit |
US10/911,070 US20050049052A1 (en) | 2001-07-05 | 2004-08-04 | Longitudinal plunging unit |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/184,262 Continuation US6793583B2 (en) | 2001-07-05 | 2002-06-26 | Longitudinal plunging unit |
Publications (1)
Publication Number | Publication Date |
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US20050049052A1 true US20050049052A1 (en) | 2005-03-03 |
Family
ID=7690744
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US10/184,262 Expired - Fee Related US6793583B2 (en) | 2001-07-05 | 2002-06-26 | Longitudinal plunging unit |
US10/911,070 Abandoned US20050049052A1 (en) | 2001-07-05 | 2004-08-04 | Longitudinal plunging unit |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/184,262 Expired - Fee Related US6793583B2 (en) | 2001-07-05 | 2002-06-26 | Longitudinal plunging unit |
Country Status (3)
Country | Link |
---|---|
US (2) | US6793583B2 (en) |
JP (1) | JP2003028185A (en) |
DE (1) | DE10132658C1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010054635A1 (en) * | 2008-11-12 | 2010-05-20 | Neumayer Tekfor Holding Gmbh | Damper unit for a shaft |
WO2019050053A1 (en) * | 2017-09-05 | 2019-03-14 | 이래에이엠에스 주식회사 | Plunging assembly for drive shaft, and drive shaft comprising same |
Families Citing this family (11)
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FR2850144B1 (en) * | 2003-01-17 | 2006-01-13 | Snecma Moteurs | ARRANGEMENT FOR MOUNTING AN EPICYCLOIDAL SATELLITE |
GB2411930B (en) * | 2004-03-08 | 2007-10-17 | Ford Global Tech Llc | Driveshaft plunging units |
DE102004039642B3 (en) * | 2004-08-16 | 2006-06-14 | Gkn Driveline Deutschland Gmbh | Käfiganschlag on profile pin a longitudinal displacement unit |
WO2006048031A1 (en) * | 2004-11-02 | 2006-05-11 | Gkn Driveline International Gmbh | Counter track joint with optimised constructional space |
US7587965B2 (en) * | 2005-05-03 | 2009-09-15 | Purdue Research Foundation | Tool holder assembly and method for modulation-assisted machining |
US8734045B1 (en) | 2012-11-16 | 2014-05-27 | Dana Automotive Systems Group, Llc | Inner race and boot sleeve |
KR101891134B1 (en) * | 2016-06-13 | 2018-08-23 | 이래에이엠에스 주식회사 | Driveshaft for vehicles |
US10385926B2 (en) * | 2016-11-15 | 2019-08-20 | Steering Solutions Ip Holding Corporation | Variable stiffness joint assembly having a bushing assembly |
WO2019050055A1 (en) * | 2017-09-05 | 2019-03-14 | 이래에이엠에스 주식회사 | Drive shaft for vehicle |
KR102067649B1 (en) * | 2018-01-22 | 2020-01-17 | 이래에이엠에스 주식회사 | Plunging assembly for driveshaft |
KR102274744B1 (en) * | 2020-02-07 | 2021-07-08 | 이래에이엠에스 주식회사 | Heat treatment method for tubular shaft for drive shaft having ball spline structure and tubular shaft manufactured by the same |
Citations (1)
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US5624318A (en) * | 1994-06-03 | 1997-04-29 | Lohr & Broomkamp Gmbh | Constant velocity joint with a connecting shaft |
Family Cites Families (6)
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US2400374A (en) * | 1943-11-03 | 1946-05-14 | Ex Cell O Corp | Control means for antifriction bearings |
US2562729A (en) * | 1946-09-11 | 1951-07-31 | Western Electric Co | Driving mechanism |
FR2554528B1 (en) * | 1983-11-04 | 1987-04-10 | Glaenzer Spicer Sa | ARRANGEMENT OF TWO ANIMATED BODIES OF RELATIVE ALTERNATIVE MOVEMENTS AND ITS APPLICATION TO SLIDING LOCAL JOINTS |
SE450153B (en) * | 1985-01-22 | 1987-06-09 | Ffv Affersverket | TELESCOPE CONTROL, SPECIAL FOR TRANSMISSION OF TORQUE |
US4981459A (en) * | 1989-05-30 | 1991-01-01 | Dana Corporation | Anti-lock ball spline assembly |
DE19952245C2 (en) * | 1998-12-05 | 2002-11-28 | Gkn Loebro Gmbh | telescopic shaft |
-
2001
- 2001-07-05 DE DE10132658A patent/DE10132658C1/en not_active Expired - Fee Related
-
2002
- 2002-06-20 JP JP2002180122A patent/JP2003028185A/en active Pending
- 2002-06-26 US US10/184,262 patent/US6793583B2/en not_active Expired - Fee Related
-
2004
- 2004-08-04 US US10/911,070 patent/US20050049052A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5624318A (en) * | 1994-06-03 | 1997-04-29 | Lohr & Broomkamp Gmbh | Constant velocity joint with a connecting shaft |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010054635A1 (en) * | 2008-11-12 | 2010-05-20 | Neumayer Tekfor Holding Gmbh | Damper unit for a shaft |
US20110212787A1 (en) * | 2008-11-12 | 2011-09-01 | Neumayer Tekfor Holding Gmbh | Damper Unit for a Shaft |
US8221250B2 (en) | 2008-11-12 | 2012-07-17 | Neumayer Tekfor Holding Gmbh | Damper unit for a shaft |
WO2019050053A1 (en) * | 2017-09-05 | 2019-03-14 | 이래에이엠에스 주식회사 | Plunging assembly for drive shaft, and drive shaft comprising same |
Also Published As
Publication number | Publication date |
---|---|
JP2003028185A (en) | 2003-01-29 |
US6793583B2 (en) | 2004-09-21 |
DE10132658C1 (en) | 2003-04-24 |
US20030008717A1 (en) | 2003-01-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: GKN LOBRO GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WELSCHOF, HANS-HEINRICH;REEL/FRAME:015365/0823 Effective date: 20040830 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |