GB2545059A - Lenear bushing and bearing assembly with such a linear bushing - Google Patents

Lenear bushing and bearing assembly with such a linear bushing Download PDF

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Publication number
GB2545059A
GB2545059A GB1617375.9A GB201617375A GB2545059A GB 2545059 A GB2545059 A GB 2545059A GB 201617375 A GB201617375 A GB 201617375A GB 2545059 A GB2545059 A GB 2545059A
Authority
GB
United Kingdom
Prior art keywords
linear bushing
linear
bushing
axial ends
outer periphery
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.)
Withdrawn
Application number
GB1617375.9A
Other versions
GB201617375D0 (en
Inventor
Knecht Markus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of GB201617375D0 publication Critical patent/GB201617375D0/en
Publication of GB2545059A publication Critical patent/GB2545059A/en
Withdrawn legal-status Critical Current

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
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F16C29/068—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track
    • F16C29/0683—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque
    • F16C29/0685—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque with balls
    • F16C29/0688—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque with balls whereby a sleeve surrounds the circulating balls and thicker part of the sleeve form the load bearing tracks
    • 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
    • F16C29/001—Bearings for parts moving only linearly adjustable for alignment or positioning
    • 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
    • F16C29/002—Elastic or yielding linear bearings or bearing supports
    • 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
    • F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F16C29/068—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track
    • F16C29/0683—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque
    • F16C29/0685—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque with balls
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/07—Fixing them on the shaft or housing with interposition of an element
    • F16C35/077—Fixing them on the shaft or housing with interposition of an element between housing and outer race ring
    • 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
    • F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F16C29/068—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track
    • F16C29/0692—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a guide rail or track of non-circular cross-section, e.g. with grooves or protrusions, i.e. the linear bearing is suited to transmit torque
    • F16C29/0695—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a guide rail or track of non-circular cross-section, e.g. with grooves or protrusions, i.e. the linear bearing is suited to transmit torque with balls

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bearings For Parts Moving Linearly (AREA)

Abstract

Linear bushing for the longitudinally displaceable mounting of shafts (13). The bushing has multiple continuous circulation channels (3) for balls (4) distributed over the circumferential sides of the bushing. Each circulation channel (3) has a load section arranged along the longitudinal axis of the linear bushing, a return section (5) and also two deflection sections continuously connecting the load section with the return section. A circumferential gasket (6) is arranged on the outer periphery of the linear bushing at the two axial ends thereof. The gasket may be a sealing ring 8, such as an O-ring, held in a circumferential groove 9. The sealing ring may be sprayed with a sealing lip onto the bushing. The bushing may have multiple segments to form the circulation channels which are held together by rings arranged at the axial ends of the segments. The gaskets may be arranged on the outer periphery of these rings.

Description

Linear Bushing and Bearing Assembly with such a Linear Bushing
Linear bushings have been known for some time. They serve to mount shafts in a longitudinally movable manner. Such a linear bushing was known, for example, from patent GB 917887. Like the present invention, these known linear bushings have multiple continuous circulation channels for balls distributed over the periphery. Each circulation channel comprises a load section arranged along the longitudinal axis of the linear bushing, a return section and also two deflection sections continuously connecting the load section with the return section. These linear bushings can be mounted in a casing bore of a casing. Some applications require a complete seal of the outer periphery of the linear bushing.
It was an object of the invention to propose a linear bushing according to the preamble of claim 1 that provides an improved seal.
This object is achieved according to the invention by the linear bushing according to claim 1. Preferred further developments are specified in the dependent claims.
The linear bushing according to the invention for the longitudinally displaceable mounting of shafts has multiple continuous circulation channels for balls distributed over the periphery. Each circulation channel has a load section arranged along the longitudinal axis of the linear bushing, a return section and also two deflection sections continuously connecting the load section with the return section. Because a circumferential gasket is respectively arranged on the outer periphery of the linear bushing at the two axial ends thereof, the linear bushing can be inserted, for example, into a casing bore of a casing without further measures. No further measures are necessary for sealing the outer periphery of the casing.
The linear bushing can respectively have a circumferential groove at its two axial ends, in which the gasket configured as sealing ring is arranged. Commercially available O-rings can be used. Expediently, the dimensions of the groove depth and the groove width are such that the inserted sealing ring has an outside diameter larger than the outside diameter of the linear bushing. When this linear bushing is inserted into a prepared casing bore, the sealing ring comes into abutment against the wall of the casing bore and in this way seals the outer periphery of the linear bushing from the surrounding area outside the casing bore.
As an alternative to sealing rings it can also be advantageous to respectively spray a sealing ring with a circumferential sealing lip onto the two axial ends of the linear bushing. Like the previously described sealing ring, the sealing lip can abut against the wall of the casing bore to form a seal.
The linear bushing can have a sleeve, in which the ball circulation paths are arranged, wherein the gaskets are arranged on the outer periphery of the sleeve. The described circumferential grooves can thus be configured on the sleeve. Alternatively, the gaskets provided with the sealing lips can be sprayed onto the outer periphery of the sleeve.
Another expedient type of linear bushing can have multiple segments distributed over the periphery to form the circulation channels, wherein all the segments are held together by two rings arranged at the two axial ends of the segments. In this case the gaskets can be arranged on the outer periphery of the two rings, i.e. can be configured as sealing rings, which are inserted into circumferential grooves of the two rings or sprayed onto the outer periphery of these rings.
It is advantageous to provide a linear bearing assembly with a linear bushing according to the invention. This linear bearing assembly has a casing, in the casing bore of which the linear bushing is mounted, wherein the sealing rings or the sealing lips of the gaskets abut against the wall of the casing bore to form a seal.
The invention shall be explained in more detail below on the basis of an exemplary embodiment shown in a figure.
The single figure shows a linear bearing assembly with a linear bushing, which is mounted in a casing bore 1 of a casing 2. A shaft 13 is mounted in the linear bushing to be longitudinally displaceable.
As in the aforementioned patent GB 917887, multiple continuous circulation channels 3 distributed over the periphery are provided for balls 4. Each circulation channel 3 has a load section (not shown) arranged along the longitudinal axis of the linear bushing, a return section 5 and also two deflection sections (not shown) continuously connecting the load section with the return section 5.
On the outer periphery at its two axial ends the linear bushing bears a respective circumferential gasket 6, which abuts against a wall 7 of the casing bore 1 to form a seal. In the exemplary embodiment the gasket 6 is configured as a sealing ring 8, which is also known as a commercially available O-ring.
At its two axial ends the linear bushing is respectively provided with a groove 9, which is arranged circumferentially around the axis of the linear bushing and into which the sealing ring 8 is inserted. The inserted sealing ring 8 has an outside diameter, which is larger than the outside diameter of the linear bushing and is also larger than the diameter of the casing bore 1. After the insertion of the linear bushing the two sealing rings 8 are elastically deformed and abut against the wall 7 of the casing bore 1 to form a seal. Displaced material can be diverted into a prepared diversion area of the groove 9.
In the exemplary embodiment the linear bushing has a sleeve 10, in which the described ball circulation paths are arranged, wherein the grooves 9 are inserted into the sleeve 10

Claims (8)

Claims
1. Linear bushing for the longitudinally displaceable mounting of shafts (13), which has multiple continuous circulation channels (3) for balls (4) distributed over the periphery, wherein each circulation channel (3) has a load section arranged along the longitudinal axis of the linear bushing, a return section (5) and also two deflection sections continuously connecting the load section with the return section, characterised in that a circumferential gasket (6) is respectively arranged on the outer periphery of the linear bushing at the two axial ends thereof
2. Linear bushing according to claim 1, which respectively has a circumferential groove (9) at its two axial ends, in which the gasket configured as sealing ring (8) is arranged.
3. Linear bushing according to one of claims 1 to 2, the sealing ring (8) of which has an outside diameter larger than the outside diameter of the linear bushing.
4. Linear bushing according to claim 1, onto the two axial ends of which a respective sealing ring (8) with a circumferential sealing lip is sprayed.
5. Linear bushing according to at least one of claims 1 to 4, in the sleeve (9) of which the ball circulation paths are arranged, wherein the gaskets (6) are arranged on the outer periphery of the sleeve (9).
6. Linear bushing according to at least one of claims 1 to 4, which has multiple segments distributed over the periphery to form the circulation channels (3), wherein all the segments are held together by two rings arranged at the two axial ends of the segments, and wherein the gaskets (6) are arranged on the outer periphery of the two rings.
7. Linear bearing assembly with a linear bushing according to at least one of claims 2 to 3 and 5, with a casing (2), in the casing bore (1) of which the linear bushing is mounted, wherein the sealing rings (8) abut against the wall (7) of the casing bore (1) to form a seal.
8. Linear bearing assembly with a linear bushing according to at least one of claims 1 and 4 and 5, with a casing (2), in the casing bore (1) of which the linear bushing is mounted, wherein the sealing lip abuts against the wall (7) of the casing bore (1) to form a seal.
GB1617375.9A 2015-10-16 2016-10-13 Lenear bushing and bearing assembly with such a linear bushing Withdrawn GB2545059A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015220161.9A DE102015220161A1 (en) 2015-10-16 2015-10-16 Ball bushing and bearing assembly with such a ball bushing

Publications (2)

Publication Number Publication Date
GB201617375D0 GB201617375D0 (en) 2016-11-30
GB2545059A true GB2545059A (en) 2017-06-07

Family

ID=57680863

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1617375.9A Withdrawn GB2545059A (en) 2015-10-16 2016-10-13 Lenear bushing and bearing assembly with such a linear bushing

Country Status (2)

Country Link
DE (1) DE102015220161A1 (en)
GB (1) GB2545059A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3907384A (en) * 1973-10-10 1975-09-23 Rockwell International Corp Anti-friction ball bearing assembly
GB2066378A (en) * 1979-12-21 1981-07-08 Skf Kugellagerfabriken Gmbh Linear recirculating rolling bearing
US4327949A (en) * 1979-02-26 1982-05-04 Sro Kugellagerwerke J. Schmid-Roost Ag Axial-rotary ball-bearing guide element
EP0104308A2 (en) * 1982-09-27 1984-04-04 Thomson Industries Inc. Combination of rotary and rectilinear bearing
WO2000025034A1 (en) * 1998-10-27 2000-05-04 Thomson Industries, Inc. Nested track bearing

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1194649B (en) 1960-08-13 1965-06-10 Zahnradfabrik Friedrichshafen Bullet socket

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3907384A (en) * 1973-10-10 1975-09-23 Rockwell International Corp Anti-friction ball bearing assembly
US4327949A (en) * 1979-02-26 1982-05-04 Sro Kugellagerwerke J. Schmid-Roost Ag Axial-rotary ball-bearing guide element
GB2066378A (en) * 1979-12-21 1981-07-08 Skf Kugellagerfabriken Gmbh Linear recirculating rolling bearing
EP0104308A2 (en) * 1982-09-27 1984-04-04 Thomson Industries Inc. Combination of rotary and rectilinear bearing
WO2000025034A1 (en) * 1998-10-27 2000-05-04 Thomson Industries, Inc. Nested track bearing

Also Published As

Publication number Publication date
GB201617375D0 (en) 2016-11-30
DE102015220161A1 (en) 2017-04-20

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)