US3557721A - Arrangement for guiding and supporting a tabletop for lengthwise movement - Google Patents

Arrangement for guiding and supporting a tabletop for lengthwise movement Download PDF

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Publication number
US3557721A
US3557721A US792999*A US3557721DA US3557721A US 3557721 A US3557721 A US 3557721A US 3557721D A US3557721D A US 3557721DA US 3557721 A US3557721 A US 3557721A
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United States
Prior art keywords
tabletop
race
arrangement
path
bearings
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Expired - Lifetime
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US792999*A
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English (en)
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Hans Worm
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Individual
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Individual
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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
    • 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
    • F16C29/063—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body, e.g. a carriage or part thereof, provided between the legs of a U-shaped guide rail or track

Definitions

  • the invention relates to a guide arrangement for guiding and supporting a tabletop (that is, the upper, flat member of a table) for lengthwise movement, the arrangement including two outer guide rails between which the tabletop moves, movable bearings, two closed-path races for the bearings, each race comprising a rolling path, a return path, and two connecting paths, whereby each race forms a closed path about which the bearings are free to move, holding means for preventing the bearings from falling out of at least the rolling path, a race in each outer guide rail for the rolling path, two spaced edges incorporated by the holding means, and a groove in each outer guide rail race for accepting a respective holding means edge.
  • the purpose of the invention is to produce a guide arrangement having two bearing races, the arrangement being easily adjustable to eliminate play and leaving sufficient space to mount drive parts, such as a nut for a spindle, a cylinder, or a piston rod.
  • the guide rail is made in two parts and adjusted in position with respect to the outer rails by spacers or resilient elements.
  • FIG. 1 is a view, taken along line H of FIG. 2, of one form of the guide arrangement
  • FIG. 2 is a view of the underside of a tabletop provided with the guide arrangement of the invention, several of the parts being either partly cut away or removed;
  • FIG. 3 is a front view of one form of the guide rail
  • FIG. 4 is a front view of another form of the guide rail
  • FIG. 5 is a perspective view of a cover for a connecting path of a race
  • FIG. 6 is a top view of the guiding and holding plate for the bearings
  • FIG. 7 is a perspective view of the two race paths
  • FIG. 8 is a perspective view of a tabletop with races that form an integral part of the top;
  • FIG. 9 is a perspective view of the tabletop shown in FIG. 8, the guide rail shown in FIG. 3, and the plate shown in FIG. 6, all parts being assembled and the races filled with ball bearings;
  • FIG. 10 is a perspective view of the complete guide arrange ment 'as seen from below, the two-part guide rail shown in FIG. 4 being used.
  • the guide arrangement of the invention is located between a tabletop l, which has a perfectly flat upper surface, and two outer guide rails 2, between which latter the tabletop is movable lengthwise.
  • Ball bearings 3 are held in races between the tabletop l and each rail 2.
  • Each of the two races is composed of a rolling path 4, two connecting paths 5, and a return path 6. Only the ball bearings in the rolling path 4 guide and support the tabletop in the guide rails 2.
  • the race for the rolling path 4 is actually composed of two races, the one race 2a being embodied in each guide rail 2 and the other race 7a being embodied in a flat guide rail 7, which is bolted to the tabletop l.
  • the race paths 5 and 6 are made integral with the bottom surface of the tabletop, as shown in FIG. 8.
  • a metal plate 8, shown in FIG. 6, is bolted to the underside of the tabletop to prevent the ball bearings 3 from falling out of the races and to guide them in their movement.
  • the outer edge 8a of the plate 8 extends with clearance into a groove 9 of each rail 2.
  • the curved edges 8b are considerably stressed and, therefore, advantageously hardened.
  • Metal covers 10 of which one is illustrated in FIG. 5 cover the connecting paths 5.
  • the underside of the rail 7 has a flat surface for the easy mounting of parts for driving the tabletop.
  • Two such parts, a nut 11 and a drivespindle 12, are shown in dot-dash line mounted on the rail 7. Instead of these parts, a hydraulic drive can be fitted.
  • a playless adjustment of the tabletop 1 can be obtained, for example, by moving one of the guide rails 2 towards the other, using adjusting screws, not shown.
  • FIGS. 4 and l0 Another way of obtaining this playless adjustment is to use a two-piece guide rail 13 (see FIGS. 4 and l0)in place of the one-piece rail 7.
  • Each guide-rail part embodies a slanting edge surface 13b opposite the bearing race 13a.
  • spacers 14, placed between these surfaces 13b can be vertically positioned by screws 15 to press the guide rail pieces with the desired force against the rails 2 through the bearings 3.
  • Resilient elements, such as springs, can be substituted for the spacers 14.
  • the races 7a or 13a are advantageously ground out somewhat, or otherwise enlarged, along the middle portion of the rail. In this way, only those ball bearings located at the beginning and end of the races 7a or 13a are used as load-bearing and guide elements, whereby the tabletop moves more easily and smoothly.
  • the bearing race paths 5 and 6 formed as an integral part of the tabletop enable a reduction in the cost of machining the bearing races.
  • the tabletop can be a metal casting, in which case the paths 5 and 6 are cast integrally with the top, or made of a suitable synthetic plastic, the paths 5 and 6 being molded into the tabletop.
  • An arrangement for guiding and supporting a tabletop for lengthwise movement including two outer guide rails between which the tabletop moves, bearings, two races for said bearings, each said race comprising a rolling path, a return path, and two connecting paths, each said connecting path connecting one end of said rolling path to the corresponding end of said return path, whereby each said race forms a closed path about which said bearings are free to move, holding means (8) for preventing said bearings from falling out of at least said rolling path, two spaced edges incorporated by said holding means, a race (20) in each said outer guide rail for said rolling path, and a groove (9)'in each said outer guide rail race for accepting a respective said holding means edge, and wherein in the improvement comprises that said connecting and return paths are arranged in the tabletop, a flat guide means (7 or 13) and a cover (10) for covering said connecting and return paths so that the upper surface of the tabletop and the lower surface of said flat guide means are flat and smooth for the mounting of a drive mechanism for the table.
  • said flat guide means (13) is located between said two outer guide rails and comprises two spaced parts, and means for pressing each said part against the respective said outer guide rail through said bearings to eliminate play.
  • said pressing means comprises at least one adjustable spacer (14!) positioned between said two parts and acting thereon.
  • said pressing means comprises at least one resilient element positioned between said two parts and acting thereon.
  • each said guide means race is enlarged along the central part of its length so that only those bearings at the beginning and end of said rolling path act as load-bearing and guide elements.
  • each said closed race extends in the lengthwise direction of the tabletop, said connecting and return paths are integrally incorporated in the underside of the tabletop, said flat guide means is located between said two outer guide rails and on the under side of the tabletop, and including a race (7a or 13a) in said flat guide means for each said rolling path, each said latter race being positioned opposite a respective said outer guide rail race to form therewith a complete said rolling path, whereby only those bearings in said rolling path serve to support and guide the tabletop in said outer guide rails.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bearings For Parts Moving Linearly (AREA)
  • Machine Tool Units (AREA)
US792999*A 1968-10-30 1969-01-22 Arrangement for guiding and supporting a tabletop for lengthwise movement Expired - Lifetime US3557721A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1619968A CH498315A (de) 1968-10-30 1968-10-30 Führungselement für eine längsbewegliche Tischplatte

Publications (1)

Publication Number Publication Date
US3557721A true US3557721A (en) 1971-01-26

Family

ID=4415246

Family Applications (1)

Application Number Title Priority Date Filing Date
US792999*A Expired - Lifetime US3557721A (en) 1968-10-30 1969-01-22 Arrangement for guiding and supporting a tabletop for lengthwise movement

Country Status (7)

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US (1) US3557721A (zh)
JP (1) JPS4825447B1 (zh)
BE (1) BE726064A (zh)
CH (1) CH498315A (zh)
DE (2) DE6809634U (zh)
FR (1) FR1597947A (zh)
GB (1) GB1216064A (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4348063A (en) * 1980-12-23 1982-09-07 Ncr Corporation Ball bearing slide
US20070034292A1 (en) * 2005-07-14 2007-02-15 Smith Darrin E Sliding table for machine or workbench
US20080284081A1 (en) * 2007-05-16 2008-11-20 Darrin Eugene Smith Working surface for machine or workbench

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60256619A (ja) * 1984-05-31 1985-12-18 Nippon Thompson Co Ltd 狭隘形無限直線運動用玉軸受
JPH04107352A (ja) * 1990-08-27 1992-04-08 T H K Kk 住復運動装置
US5737984A (en) * 1995-07-03 1998-04-14 C.J. Winter Machine Works, Inc. Shave tool holder roller work support with quick-release pin and adjustments
DE19614513B4 (de) * 1996-04-12 2008-12-11 Schaeffler Kg Linearwälzlager mit einer U-förmigen Führungsschiene

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2681836A (en) * 1950-03-09 1954-06-22 Jarund Harry Sigurd Valdemar Block bearing
US3398999A (en) * 1966-08-15 1968-08-27 Ex Cell O Corp Linear motion ball bearing assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2681836A (en) * 1950-03-09 1954-06-22 Jarund Harry Sigurd Valdemar Block bearing
US3398999A (en) * 1966-08-15 1968-08-27 Ex Cell O Corp Linear motion ball bearing assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4348063A (en) * 1980-12-23 1982-09-07 Ncr Corporation Ball bearing slide
US20070034292A1 (en) * 2005-07-14 2007-02-15 Smith Darrin E Sliding table for machine or workbench
US7497239B2 (en) * 2005-07-14 2009-03-03 Darrin Eugene Smith Sliding table for machine or workbench
US20080284081A1 (en) * 2007-05-16 2008-11-20 Darrin Eugene Smith Working surface for machine or workbench

Also Published As

Publication number Publication date
DE6809634U (de) 1969-05-14
DE1812376B2 (zh) 1970-10-29
JPS4825447B1 (zh) 1973-07-28
DE1812376A1 (de) 1970-07-23
CH498315A (de) 1970-10-31
FR1597947A (zh) 1970-06-29
BE726064A (zh) 1969-05-29
GB1216064A (en) 1970-12-16

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