WO2001007794A1 - Mounting on roll bearings - Google Patents
Mounting on roll bearings Download PDFInfo
- Publication number
- WO2001007794A1 WO2001007794A1 PCT/EP2000/004156 EP0004156W WO0107794A1 WO 2001007794 A1 WO2001007794 A1 WO 2001007794A1 EP 0004156 W EP0004156 W EP 0004156W WO 0107794 A1 WO0107794 A1 WO 0107794A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rolling
- component
- rolling elements
- track
- raceway
- Prior art date
Links
Classifications
-
- 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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/306—Means to synchronise movements
-
- 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
- F16C29/00—Bearings for parts moving only linearly
- F16C29/04—Ball or roller 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/46—Cages for rollers or needles
- F16C33/4617—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages
- F16C33/4623—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages
Definitions
- the invention relates to a rolling bearing for two linearly or rotationally moving components, each having a raceway, between which rolling elements are arranged rolling on the raceways.
- Rolling bearings are e.g. used in the form of linear roller guides, in which the two components are linearly displaceable and the raceways of the components are arranged flat and parallel to each other.
- One of the components can e.g. be designed as a roller circulation shoe that can be moved along a guide rail, which is the second component. Rolling elements are guided in the roller circulation shoe, which roll on a raceway of the roller circulation shoe and on a raceway of the guide rail.
- the disadvantage here is that the rolling elements must be returned to the beginning of the raceway via return channels after the end of the roller race shoe's career.
- the recirculation channels result in large-scale roller circulation shoes.
- Rolling bearings for components that move linearly to one another can also have rolling elements which are guided separately in a cage.
- the rolling elements roll on the raceways of both components without to be returned within one of the components. The result of this is that the rolling elements travel half the way relative to a component of the path that the two components travel to each other.
- the path by which the two components can be moved in a rolling manner is therefore fundamentally limited by the length of the raceway and by the maximum rolling path of the rolling elements.
- Rolling bearings are also e.g. used as a radial roller bearing, in which the two components are arranged rotatable relative to one another about an axis of rotation, one of the components being arranged coaxially around the respective other component.
- the raceways run in a circle around the axis of rotation.
- the rolling elements, which are arranged between the raceways, are usually guided in cages and rotate about the axis of rotation. Since the rolling elements rotate completely around the circumference of the component arranged on the inside, a large installation space for the rolling elements must be provided.
- the object of the present invention is to provide a rolling bearing for components which are moved linearly or rotatively relative to one another, which has a smaller installation space and which allows an unlimited path by which the two components can be moved relative to one another.
- the object is achieved by a roller bearing for components that are moved linearly or rotatively relative to one another, with a first component having a first track, with a second component having a second track, the first component and the second component being arranged so as to be movable relative to one another, with rolling elements which are arranged to roll between the first raceway and the second raceway, the second raceway being periodically interrupted in the direction or counter to the rolling movement of the rolling elements by restoring areas within which the rolling elements are out of contact with the second raceway, and wherein the rolling elements relative to the first component starting from an initial position a limited rolling path are displaceable and are acted upon by reset means in the direction of the starting position.
- the rolling elements thus pass through areas in the second track in which the rolling elements roll on the second track and transmit a load, as well as reset areas in which the rolling elements do not roll and do not transfer any load.
- the rolling elements are guided back by the spring means that they traveled in a rolling manner in the previous area.
- the roller bearing thus enables movement that is only limited by the length of the second raceway. With linear rolling guides, rolling element returns are no longer necessary.
- the rolling elements move relative to the first component only within a limited rolling path. In the case of radial roller bearings, the roller bodies therefore do not undergo a full revolution about the axis of rotation relative to the first component.
- the rolling elements therefore only have to be arranged in zones of the circumference which are loaded by radial forces. Compared to linear roller guides without roller body circulation, there is the advantage of the forced movement of the roller bodies and they cannot therefore run and block to one end of the roller guide.
- the reset areas can be represented by depressions in the second career. This ensures by simple means that the rolling elements in the reset areas are out of contact with the second raceway. However, other means are also conceivable which ensure that the rolling elements can be moved back to the starting position in the reset areas, such as e.g. friction-reducing agents that allow the rolling elements to slide.
- the rolling elements can be rolling elements usually used in rolling bearings, such as. B. balls, rollers or needles. These roll and move on the raceways yourself from the starting position. In the reset areas, the rolling elements are moved back into the starting position in a translatory manner.
- Rolling elements that are flattened on diametrically opposite sides can also be used. These rolling bodies pivot out of the starting position over a limited angular range and are pivoted back into the starting position in the return ranges by means of the return means.
- the restoring means can comprise cages and spring means, the rolling elements being guided in the cages and by means of the spring means, which are supported on the one hand against the first component and on the other hand at least in the position of the respective rolling elements which deviate from the starting position, in the direction of the starting position are acted upon.
- a cage can be provided for each rolling element.
- a cage can also carry several rolling elements. The function of guiding the rolling elements and the function of resetting the rolling elements are thus each taken over by a separate component, and in addition, by using cages, a plurality of rolling elements can be combined into groups, each of which is loaded together by spring elements in the direction of the starting position.
- the restoring elements may comprise spring means which are supported on the one hand against the first component and on the other hand against a rolling body at least in positions of the respective rolling element which deviate from the starting position.
- the spring means thus act on the rolling elements without the interposition of a cage. This reduces the number of parts and enables a compact design.
- one spring means can be arranged in front of each rolling element and one spring means behind the respective rolling element.
- the spring means can be supported in the starting position of the rolling elements on the one hand against the first component and on the other hand in the direction of the respective rolling elements against a stop of the first component.
- a plurality of rolling elements is preferably arranged one behind the other in the direction of the rolling movement of the rolling elements. It should be noted here that as many rolling elements as possible always roll on the second raceway and transmit a load.
- the division of the rolling elements i.e. the distance between two successive rolling elements in the starting position is the same between all rolling elements
- the division of the reset areas i.e. the distance in the direction of the rolling movement from the beginning of a reset area to the beginning of the subsequent reset area is the same between all reset areas and that neither of the two divisions corresponds to an integral multiple of the respective other division.
- the pitch of the rolling elements varies and that the pitch of all reset areas is the same.
- Unequal divisions can also be selected with regard to the rolling elements and the resetting areas under special conditions.
- roller bearing is designed as a linear roller guide, the two components are arranged linearly displaceable against each other and the two raceways are arranged flat and parallel to each other.
- the second raceway is longer than the first raceway, that the rolling elements are arranged over the entire length of the first raceway, that the second raceway is assigned to a fixed machine part and that the first raceway is opposite one fixed machine part is assigned to movable machine part.
- the rolling elements thus move together with the movable machine part.
- the first track is longer than the second track, that the rolling elements are arranged over the entire length of the first track, that the first track is assigned to a fixed machine part and that the second track is movable relative to the fixed machine part Machine part is assigned.
- the rolling elements are thus assigned to the stationary machine part, so that the movable machine part moves along the rolling elements.
- roller bearing is designed as a radial roller bearing and that the two components are arranged rotatable relative to one another about an axis of rotation and one of the components is at least partially arranged coaxially around the respective other component and that the track of the component arranged on the inside is arranged in a circle around the axis of rotation and the raceway of the component arranged on the outside on a circle or an arc coaxially around the raceway of the internally arranged component is arranged.
- the second component With radial roller bearings, it is thus possible to provide rolling elements only in the loaded areas of the circumference of the raceways.
- the second component it is possible for the second component to be represented by a toothed wheel, the second raceway being formed by the tooth heads and the restoring areas by the gaps between two successive teeth. Since the rolling elements do not complete a complete revolution around the axis of rotation, a compact design is possible.
- the roller bearing is designed as an axial roller bearing, that the two components are arranged rotatably relative to one another about an axis of rotation and that the raceways of the two components are each axially spaced apart on a circle coaxially around the axis of rotation.
- Partial supports can be provided by groups of rolling elements, the rolling elements within a group only extending over part of the circumference of the raceways.
- the roller bearing according to the invention can also be designed as a ball screw drive. It can also be designed as a bearing with a combined rotary and linear movement.
- the object is achieved by a roller bearing arrangement in which at least two roller bearings with the aforementioned features are arranged next to one another, the first components of the roller bearings being firmly connected to one another and the second components of the roller bearings being firmly connected to one another and in any position of the first components relative to the second components, at least the rolling elements of a rolling bearing roll between the respective first raceway and the each second career are arranged, solved.
- FIG. 1 shows a sketch of a roller bearing according to the invention for linearly moving components
- FIG. 2 shows a longitudinal section through a roller bearing with a cage in which two roller bodies are guided
- FIG. 3 shows a top view of a first component according to view III-III in FIG. 2,
- FIG. 4 shows the sketch of a roller bearing in which all the distances between two successive rolling elements are the same in their starting positions and the distances vary from the beginning of a resetting area to the beginning of the subsequent resetting area
- FIG. 6 shows the top view of a first component with resilient tabs which are supported directly against the rolling element
- FIG. 7 shows an arrangement of several rolling elements in two rows, spring elements being supported directly against the rolling elements
- FIG. 8 shows the combination of two roller bearings according to the invention, one of which is designed as a radial roller bearing and the other as an axial roller bearing, and
- FIG. 9 shows the sketch of a roller bearing, the spring elements being supported directly against the component in the starting position of the roller body.
- Figure 1 shows a sketch of a longitudinal section through a roller bearing according to the invention.
- a first component 1 is arranged to be linearly movable relative to a second component 2. The direction of movement is indicated by an arrow.
- the first component 1 has a first raceway 3 which faces a second raceway 4 of the second component 2.
- the two raceways 3, 4 are flat and arranged parallel to each other.
- the second track 4 has reset areas in the form of depressions 5, 6, which are periodically arranged one behind the other in the direction of movement of the first component 1.
- the cages 8, 8 ', 8' 'and the rolling elements 7, 7', 7 '' are each by two spring elements 9, 10, 9 ', 10', 9 '', 10 '' towards an initial position of the cages 8, 8 ', 8' 'and the rolling elements 7, 7', 7 ''.
- One of the two spring elements 9, 9 ', 9' ', which are assigned to a cage 8, 8', 8 '', is arranged in the direction of movement in front of the cage 8, 8 ', 8' ', whereas the respective other spring element 10 , 10 ', 10' 'is arranged in the direction of movement of the first component 1 behind the cage 8, 8', 8 ''.
- the spring elements 9, 10, 9 ', 10', 9 '', 10 '' are each supported between the first component 1 and a cage 8, 8 ', 8' '.
- the rolling element 7 is in a starting position in which apply the same spring forces to the two spring elements 9, 10, the cage 8.
- the rolling element 7 is located at the end of the recess 5 in the direction of movement of the first component 1 and begins to roll on the second track 4.
- the rolling element 7 thus rolls on the two raceways 3, 4, the rolling element 7 rolling relative to the component 1 against the direction of movement of the component 1 and leaving the starting position relative to the component 1.
- the spring element 9 is expanded in front of the rolling element 7 and the spring element 10 is compressed behind the rolling element 7 until the rolling element 7 has assumed the position of the rolling element 7 '.
- the rolling element 7 ′′ has reached the recess 6, so that the rolling element 7 ′′ is no longer in contact with the second raceway 4.
- the rolling element 7 ′′ is therefore transferred by means of the spring elements 9 ′′ and 10 ′′ to its starting position in relation to the component 1, in which both spring elements 9 ′′ and 10 ′′ act uniformly on the cage 8 ′′.
- the rolling element 7 ′′ thus slides along the first raceway 3 in the direction of the direction of movement of the first component 1 to its starting position.
- the division of all the rolling elements 7, 7 ', 7'', ie the distance between two successive rolling elements 7, 7', 7 '' in the starting position is the same.
- the division of the reset areas ie the distance in the direction of the rolling movement, is the same from the beginning of a depression 5, 6 to the beginning of the following depression 5, 6.
- it is ensured that neither of the two divisions is an integer multiple of the other part. lung corresponds. This ensures that as many rolling elements as possible are used at all times.
- the reset areas 5 and 6 are larger than the rolling areas of the raceway 4 in order to achieve a sufficient reset time in relation to the speed of movement of the two raceways.
- FIG. 2 shows a first component 11, which can be moved linearly relative to a second component 12.
- the first component 11 has a pocket 13 in which the first raceway 14 is formed.
- a cage 15 is slidably disposed in the pocket 13 and guides two rolling elements 16, 16 '.
- the cage 15 is displaceably guided in the direction of displacement of the first component 11 and acted upon by means of two spiral compression springs 17, 18 to an initial position.
- the starting position of the cage 15 corresponds to the central position in the pocket 13.
- the second component 12 has a second track 19 which is periodically interrupted by depressions 20 in the direction of displacement of the first component 11.
- FIG. 3 shows the view of the first component 11 along the section line III-III in FIG. 2. It can be seen that, parallel to the direction of displacement of the component 11, a further pocket 21 is formed in the first component 11 in addition to the pocket 13. Corresponding to the first pocket 13, a cage 22 is slidably arranged in the second pocket 21 and guides two rolling elements 23, 23 '. The cage 22 is also acted upon by two spiral compression springs 24, 25 in the direction of an initial position.
- the two pockets 13, 21 are arranged offset to one another in the direction of movement of the first component 11, as a result of which the starting positions of the two cages 15, 22 relative to the first component 11 are also offset from one another.
- FIG. 4 shows a simplified sketch of a roller bearing, in which only a first component 26 with a first raceway 27, a second component 28 with a second raceway 29 and roller bodies 30 are shown.
- depressions 31 in the second track 29 are provided in such a way that the distances in the direction of movement, which is indicated by an arrow, of the first component 26 vary between the beginnings 32 of the depressions 31, the distances between two successive rolling bodies 30 always being the same in their starting positions.
- FIG. Another possibility of ensuring that as many rolling elements as possible always roll on the second track is shown in FIG.
- a roller bearing is shown in simplified form, only a first component 33 having a first raceway 34, a second component 35 having a second raceway 36 and roller bodies 37 being shown.
- the second track 36 is periodically interrupted by depressions 38 in the direction of movement, which is indicated by an arrow, of the first component 33, the lengths of the depressions 38 and the lengths of the uninterrupted areas of the second track 36 always being the same.
- the distances between two successive rolling elements 37 are different in their starting positions.
- FIG. 6 shows a first component 39, which has pockets 40, in which rolling elements 41 are slidably arranged.
- elastic tabs 42 are provided, which serve as spring means and act on the rolling elements 41 in the direction of their starting position.
- FIG. 7 shows an arrangement of a first component 43 and a first row of rolling bodies 44 and a second row of rolling bodies 45, the rows being arranged next to one another.
- the rolling elements 44 of the first row are in motion considered direction of the first component 43, arranged offset to the rolling elements 45 of the second row.
- spring means 46 are provided in front of a rolling element and after a rolling element, which act on the rolling elements 44, 45 in the direction of their starting position.
- FIG. 8 shows an application example of two roller bearings, one of which serves as a radial roller bearing and the other as an axial roller bearing.
- the radial roller bearing comprises a first component 47 with two first raceways 48, 48 ', which run on a circular section around an axis of rotation 49.
- the first raceways 48, 48 ' are each assigned a plurality of rolling elements 50, 50' which roll on the first raceways 48, 48 '.
- a second component 51 has a second raceway 52, which is arranged coaxially about the axis of rotation 49.
- the second track 52 is periodically interrupted by depressions 53 over the circumference.
- the rolling elements 50, 50 Since the rolling elements 50, 50 'perform only a slight rolling movement relative to the first raceways 48, 48', and while they sweep over the depressions 53, to the starting positions of which are returned, the rolling elements 50, 50 'do not run completely around the axis of rotation 49, so that the first component 47 of the radial roller bearing is small.
- the second component 51 has an annular second raceway 54 on the end face, which is periodically interrupted by depressions 55 in the circumferential direction.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bearings For Parts Moving Linearly (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00934994A EP1196695A1 (en) | 1999-07-26 | 2000-05-10 | Mounting on roll bearings |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999134961 DE19934961A1 (en) | 1999-07-26 | 1999-07-26 | Rolling bearing |
DE19934961.4 | 1999-07-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001007794A1 true WO2001007794A1 (en) | 2001-02-01 |
Family
ID=7916047
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/004156 WO2001007794A1 (en) | 1999-07-26 | 2000-05-10 | Mounting on roll bearings |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1196695A1 (en) |
DE (1) | DE19934961A1 (en) |
WO (1) | WO2001007794A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2213890B1 (en) * | 2009-02-03 | 2013-11-27 | Ab Skf | Linear guide with locking means |
DE102014225134A1 (en) * | 2014-12-08 | 2015-11-26 | Schaeffler Technologies AG & Co. KG | roller bearing |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4280341A (en) * | 1978-02-04 | 1981-07-28 | Uni-Cardan Ag | Telescopic drive shaft |
US4720197A (en) * | 1985-11-09 | 1988-01-19 | Fag Kugelfischer Georg Schafer (Kgaa) | Ball sleeve for guiding axially displaceable parts |
DE3741513A1 (en) * | 1987-12-08 | 1989-06-22 | Schaeffler Waelzlager Kg | Transporting pallet for a freewheel cage |
US5344238A (en) * | 1992-12-18 | 1994-09-06 | Electroglas, Inc. | Ball bearing assembly |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE189406C (en) * | ||||
DE270675C (en) * | ||||
US2342302A (en) * | 1941-10-25 | 1944-02-22 | George A Rubissow | Part bearing |
FR1332286A (en) * | 1961-07-28 | 1963-07-12 | Rothe Erde Eisenwerk | Cages for large bearing rings |
US3184020A (en) * | 1962-03-01 | 1965-05-18 | Torrington Co | Overrunning clutch and cage therefor |
GB1411842A (en) * | 1973-02-28 | 1975-10-29 | Torrington Co | Thrust bearings |
US3937312A (en) * | 1974-10-04 | 1976-02-10 | The Torrington Company | Retainer for roller clutch |
DE3114325C2 (en) * | 1981-04-09 | 1984-02-23 | FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt | Rolling bearings, preferably a slewing ring |
FR2554532B1 (en) * | 1983-11-04 | 1988-09-23 | Glaenzer Spicer Sa | ARRANGEMENT OF TWO ANIMATED ORGANS OF AN ALTERNATIVE SLIDING MOVEMENT AND ITS APPLICATION IN A TRIPOD SLIDING JOINT |
DE8602881U1 (en) * | 1986-02-05 | 1986-03-13 | FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt | Linear bearing cage |
DE8625602U1 (en) * | 1986-09-25 | 1986-11-06 | INA Wälzlager Schaeffler KG, 8522 Herzogenaurach | Rolling bearing cage for longitudinal guides |
US5501533A (en) * | 1995-07-03 | 1996-03-26 | Roller Bearing Company Of America | Roller bearing assembly having improved axial retention and angular clocking |
US5711610A (en) * | 1997-02-21 | 1998-01-27 | Optical Gaging Products, Inc. | Bearing assembly for linear bearing slide |
-
1999
- 1999-07-26 DE DE1999134961 patent/DE19934961A1/en not_active Withdrawn
-
2000
- 2000-05-10 WO PCT/EP2000/004156 patent/WO2001007794A1/en not_active Application Discontinuation
- 2000-05-10 EP EP00934994A patent/EP1196695A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4280341A (en) * | 1978-02-04 | 1981-07-28 | Uni-Cardan Ag | Telescopic drive shaft |
US4720197A (en) * | 1985-11-09 | 1988-01-19 | Fag Kugelfischer Georg Schafer (Kgaa) | Ball sleeve for guiding axially displaceable parts |
DE3741513A1 (en) * | 1987-12-08 | 1989-06-22 | Schaeffler Waelzlager Kg | Transporting pallet for a freewheel cage |
US5344238A (en) * | 1992-12-18 | 1994-09-06 | Electroglas, Inc. | Ball bearing assembly |
Also Published As
Publication number | Publication date |
---|---|
EP1196695A1 (en) | 2002-04-17 |
DE19934961A1 (en) | 2001-02-01 |
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