KR20120071684A - Sliding bearing assembly using roller-bearing - Google Patents

Sliding bearing assembly using roller-bearing Download PDF

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Publication number
KR20120071684A
KR20120071684A KR1020100133320A KR20100133320A KR20120071684A KR 20120071684 A KR20120071684 A KR 20120071684A KR 1020100133320 A KR1020100133320 A KR 1020100133320A KR 20100133320 A KR20100133320 A KR 20100133320A KR 20120071684 A KR20120071684 A KR 20120071684A
Authority
KR
South Korea
Prior art keywords
bearing
roller bearing
wall portion
roller
rail
Prior art date
Application number
KR1020100133320A
Other languages
Korean (ko)
Inventor
하현표
Original Assignee
두산인프라코어 주식회사
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 두산인프라코어 주식회사 filed Critical 두산인프라코어 주식회사
Priority to KR1020100133320A priority Critical patent/KR20120071684A/en
Priority to PCT/KR2011/009457 priority patent/WO2012086952A2/en
Publication of KR20120071684A publication Critical patent/KR20120071684A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
    • B23Q1/40—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members using ball, roller or wheel arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
    • B23Q1/262—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members with means to adjust the distance between the relatively slidable members
    • 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
    • F16C29/0614—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a shoe type bearing body, e.g. a body facing one side of the guide rail or track only
    • 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
    • F16C29/0614—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a shoe type bearing body, e.g. a body facing one side of the guide rail or track only
    • F16C29/0621—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a shoe type bearing body, e.g. a body facing one side of the guide rail or track only for supporting load in essentially two directions, e.g. by multiple points of contact or two rows of rolling elements
    • F16C29/0626—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a shoe type bearing body, e.g. a body facing one side of the guide rail or track only for supporting load in essentially two directions, e.g. by multiple points of contact or two rows of rolling elements with rollers
    • 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
    • F16C2322/00—Apparatus used in shaping articles
    • 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
    • F16C2322/00—Apparatus used in shaping articles
    • F16C2322/39—General build up of machine tools, e.g. spindles, slides, actuators

Abstract

PURPOSE: A sliding bearing assembly using a roller bearing is provided to reduce additional consumption of oil or air and to cope with a load change. CONSTITUTION: A sliding bearing assembly using a roller bearing comprises a rail, a table(120), and a plurality of first roller bearing(130). The rail is fixed on a bed. The table is partially joined to the rail and moves to be slid with respect to the rail and an oil groove of a zigzag form is formed in a lower wall portion(120a) of the table. The first roller bearing is arranged between the rail and the table and inserted into the lower wall portion and controls pressure cased by a weight change.

Description

Sliding bearing assembly using roller bearings {Sliding bearing assembly using roller-bearing}

The present invention relates to a sliding bearing assembly, and more particularly, to a sliding bearing assembly to which roller bearings are applied.

In general, bearings are classified into sliding bearings and rolling bearings according to their contact state.

Sliding bearings are mainly used when sliding while supporting a shaft with a large load due to the large allowable load, although the sliding friction with the rotating shaft is larger than the rolling bearing.

Machine tools are widely used sliding bearings. Machine tools are widely used for various purposes including turning centers, machining centers, NC borings, door machining centers, swiss turns, and electric discharge machines. These include, for example, the Y of tables loaded with work. Sliding bearings are applied for axial drive and the like.

The technique to which a sliding bearing is applied is disclosed by Unexamined-Japanese-Patent No. 2008-238397, Unexamined-Japanese-Patent 2007-313622, 2005-313272, etc.

By the way, in the prior art disclosed in the above document, the oil groove formed in the longitudinal direction has a structure that can be changed by adjusting the pressure of oil or air while having a structure to reduce frictional force by using an additional oil pocket or air pocket. In this case, there is a problem in that the consumption of additional oil and air is excessive.

In addition, in the prior art disclosed in the document, it is difficult to adaptively respond to the load fluctuations in the structure, the wear is large, the durability is lowered, and in particular, the difficulty in controlling the rigidity of the feed system is effective structure improvement to compensate for this point Required.

Accordingly, the present invention has been made to solve the problems described above, the purpose of which is to reduce the consumption of additional oil or air as well as adaptively adapt to the load fluctuations, it is possible to improve the durability by minimizing wear In addition, to provide a sliding bearing assembly using a roller bearing that can adjust the rigidity of the feed system.

In order to achieve the above object, a rail (110) fixed to the bed (102); A table 120 which is partially coupled to the rail 110 and slidably moved with respect to the rail 110, and has a zigzag-shaped oil groove 121 formed in the bottom wall part 120a; And a plurality of first roller bearings 130 inserted into the bottom wall portion 120a between the oil grooves 121 so as to be positioned between the rails 110 and the table 120, and adjusting pressure according to a change in weight. It provides a sliding bearing assembly using a roller bearing comprising a.

In addition, the present invention further provides the following specific embodiments of the above-described embodiment of the present invention.

According to an embodiment of the present invention, the first roller bearing 130 is inserted into the bottom wall portion 120a of the table 120, and a bearing insertion groove 122 acting as a pressure chamber C is formed. The spacer S is further interposed between the bearing insertion groove 122 and the first roller bearing 130.

According to an embodiment of the present invention, the table 120 further includes a pair of side wall portions 120b extending in a direction crossing the bottom wall portion 120a at both ends of the bottom wall portion 120a. Any one of the pair of side wall portions 120b may further include a second roller bearing 140 to adjust the pressure according to the cutting force.

According to an embodiment of the present invention, the second roller bearing 140 is provided at each end of each side wall portion 120b, and the second roller bearing 140 is provided on the side wall portion 120b. Bearing seat groove 123 is characterized in that it is further formed.

According to the present invention, the consumption of additional oil or air is not only small, but can adapt to load fluctuations, minimize wear and improve durability, as well as adjust the rigidity of the feed system.

1 is a schematic structural diagram of a machine tool to which a sliding bearing assembly using a roller bearing according to an embodiment of the present invention is applied.
FIG. 2 is an enlarged view of the sliding bearing assembly of region A shown in FIG. 1.
3 is a perspective view of FIG. 2.
4 is a partially exploded perspective view of FIG. 3.
5 is a rear view of FIG. 3.
6 and 7 are front and rear exploded perspective views of the roller bearing area, respectively.
8 is a perspective view of a rail;

Hereinafter, an embodiment of a sliding bearing assembly using a roller bearing according to the present invention will be described with reference to FIGS. 1 to 7.

1 is a schematic structural diagram of a machine tool to which a sliding bearing assembly using a roller bearing according to an embodiment of the present invention is applied.

The machine tool shown in this drawing includes a work bench 101 on which a workpiece, which is a work product, is placed, a bed 102 supporting the work bench 101, and a bed 102 on the bed 102. And a carriage 107 which is reciprocated relative to.

A tool 103 for machining a workpiece is coupled to the spindle 105 at the front end of the carriage 107, and the spindle 105 is driven by the power means 106 provided on the carriage 107. Rotate 103).

The machine tool shown in FIG. 1 is only one example that can be expected, and the sliding bearing assembly 130 may be applied to implement a structure in which the carriage 107 reciprocates relative to the bed 102 as shown in FIG. 1. have.

FIG. 2 is an enlarged view of the sliding bearing assembly of region A shown in FIG. 1, FIG. 3 is a perspective view of FIG. 2, FIG. 4 is a partially exploded perspective view of FIG. 3, FIG. 5 is a rear view of FIG. 3, FIGS. 6 and 7. Are front and rear exploded perspective views of the roller bearing area, respectively, and FIG. 8 is a perspective view of the rail.

As shown in these figures, the sliding bearing assembly 100 of this embodiment includes a rail 110, a table 120, and first and second roller bearings 130, 140. The first and second roller bearings 130 and 140 have only a positional difference, and the structure thereof is the same.

The rail 110 (see FIG. 7) is the part that is secured to the bed 102 described in FIG. 1. Since the machine tool of the present embodiment may have a shape as shown in FIG. 1, the rail 110 may have an approximately L shape, but the scope of the present invention does not need to be limited to the shape thereof.

In other words, the shape of the rails 110 may vary as many as shown in FIG. 7.

Bearing rails 111a and 111b are formed on upper and side surfaces of the rail 110. The bearing movement trace part 111a of the upper surface corresponds to the first roller bearing 130, and the bearing movement trace part 111b of the side surface corresponds to the second roller bearing 140 and thus the first and second roller bearings 130. , 140 may pass through.

The bearing movement traces 111a and 111b may be provided in a form in which a separately manufactured member is coupled to the top and side surfaces of the rail 110, but may be an integrated product with the rail 110.

Of course, the bearing movement traces 111a and 111b are not necessarily formed on the rail 110 and may be omitted if necessary.

The table 120 is a structure that is partially coupled to the rail 110 and slidably moved with respect to the rail 110. It may be connected to the carriage 107 described in FIG.

In the present embodiment, the table 120 is described as being connected to the carriage 107, but the table 120 and the carriage 107 may be one body, the actual table 120 and the carriage 107 It can be much more advantageous to fabricate a single body.

This table 120 has an approximately C shape. Therefore, the table 120 may be divided into a pair of side wall portions 120b extending in a direction crossing the bottom wall portion 120a at both ends of the bottom wall portion 120a and the bottom wall portion 120a.

3 to 5, a zigzag-shaped oil groove 121 is formed in the bottom wall portion 120a, and oil flows through the oil groove 121 during the reciprocating motion of the table 120. To smoothly reciprocate the table 120. In this embodiment, the oil groove 121 has a shape in which the uneven pattern is repeated.

The first and second roller bearings 130 and 140 are coupled to the bottom wall portion 120a and one side wall portion 120b of the table 120, respectively.

As mentioned above, the first and second roller bearings 130 and 140 have the same positional difference, but the structure is the same.

Both the first and second roller bearings 130 and 140 may be provided as a modular product in which a plurality of rollers R are disposed in the roller guide G.

The first roller bearing 130 is provided to be inserted into the bottom wall portion 120a between the oil grooves 121 so as to be positioned between the rail 110 and the table 120. The first roller bearing 130 serves to adjust the pressure according to the change in weight.

In order to install the first roller bearing 130, a bearing insertion groove 122 into which the first roller bearing 130 is inserted is formed in the bottom wall portion 120a of the table 120.

At this time, after the separate spacer S is further coupled to the bearing insertion groove 122, the first roller bearing 130 is coupled. The spacer S is a means for adjusting the exposure degree of the first roller bearing 130 inserted into the bearing insertion groove 122 and the space of the pressure chamber C to be described later.

The spacer S and the roller guide G of the first and second roller bearings 130 and 140 may be bolted to each other.

Referring to the bearing insertion groove 122 in more detail with reference to Figure 2, the bearing insertion groove 122 may act as a pressure chamber (C). A through hole 122a communicating with the pressure chamber C is formed on the rear surface of the table 120 in which the bearing insertion groove 122 is formed.

For example, when the pressure P1 is applied to the pressure chamber C as shown in FIG. 2, the pressure chamber C simultaneously generates a force for pushing down the first roller bearing 130 and a force for lifting the table 120. The pressure acting on the sliding bearing assembly 100 can be maintained uniformly.

For this reason, since the variable pressure can be supplied to the first roller bearing 130 according to the load fluctuation, it is possible to provide a structure that allows the first roller bearing 130 to bear the added load.

Therefore, unlike the prior art due to the rolling of the roller (G) it is possible to reduce the frictional force due to the increased load. This is because the friction coefficient of the roller G is smaller than the friction coefficient of the sliding bearing assembly 100.

Because of this action, only a constant pressure can be added to the sliding bearing assembly 100 at all times, so that wear can be reduced and durability can be increased. Of course, there is no additional oil or air consumption as in the prior art.

The second roller bearing 140 is arranged to be positioned between the rail 110 and the table 120, but is provided at each end of one side wall portion 120b of the table 120.

At this time, the bearing seat groove 123 is further formed in the side wall portion 120b, and the second roller bearing 140 is disposed in the bearing seat groove 123 (see FIGS. 3 and 4) of the side wall portion 120b. Of course, the second roller bearing 140 may also be provided in the same structure as the first roller bearing 130.

The second roller bearing 140 is not necessarily provided, but when the second roller bearing 140 is provided as in the present embodiment, the second roller bearing 140 may be varied according to cutting force, thereby maintaining high rigidity.

For example, the second roller bearing 140 may be applied to adjust the pressure according to the cutting force, such as increasing the pressure during steel cutting and lowering the pressure during light cutting (see P2 in FIG. 2).

As such, according to the present embodiment, not only the consumption of additional oil or air is small, but also it can adaptively adapt to the load fluctuations, minimize the wear, improve the durability, and adjust the rigidity of the feed system. .

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, such modifications or variations will have to be belong to the claims of the present invention.

100: sliding bearing assembly 110: rail
111: roller bearing moving track portion 111a, 111b: bearing moving track portion
120: table 120a: bottom wall portion
120b: side wall 121: oil groove
122: bearing insertion groove 123: bearing seat groove
130, 140: roller bearing

Claims (4)

A rail 110 fixed to the bed 102;
A table 120 which is partially coupled to the rail 110 and slidably moved with respect to the rail 110, and has a zigzag-shaped oil groove 121 formed in the bottom wall part 120a; And
A plurality of first roller bearings 130 inserted into the bottom wall portion 120a between the oil grooves 121 so as to be positioned between the rails 110 and the table 120 and adjusting pressure according to a change in weight; of
Sliding bearing assembly using a roller bearing comprising.
The method of claim 1,
The first roller bearing 130 is inserted into the bottom wall portion 120a of the table 120, and a bearing insertion groove 122 acting as a pressure chamber C is formed.
Sliding bearing assembly using a roller bearing, characterized in that the spacer (S) is further interposed between the bearing insertion groove 122 and the first roller bearing (130).
The method according to claim 1 or 2,
The table 120 further includes a pair of side wall portions 120b extending in a direction crossing the bottom wall portion 120a at both ends of the bottom wall portion 120a.
Sliding bearing assembly using a roller bearing, characterized in that the one of the pair of side wall portion (120b) is further provided with a second roller bearing 140 to enable pressure adjustment according to the cutting force.
The method of claim 3,
The second roller bearing 140 is provided at each end of each of the side wall portion 120b,
Sliding bearing assembly using a roller bearing, characterized in that the bearing seat groove 123 is further formed in the side wall portion (120b) is provided with the second roller bearing (140).
KR1020100133320A 2010-12-23 2010-12-23 Sliding bearing assembly using roller-bearing KR20120071684A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020100133320A KR20120071684A (en) 2010-12-23 2010-12-23 Sliding bearing assembly using roller-bearing
PCT/KR2011/009457 WO2012086952A2 (en) 2010-12-23 2011-12-08 Sliding bearing assembly using a roller bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100133320A KR20120071684A (en) 2010-12-23 2010-12-23 Sliding bearing assembly using roller-bearing

Publications (1)

Publication Number Publication Date
KR20120071684A true KR20120071684A (en) 2012-07-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020100133320A KR20120071684A (en) 2010-12-23 2010-12-23 Sliding bearing assembly using roller-bearing

Country Status (2)

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KR (1) KR20120071684A (en)
WO (1) WO2012086952A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012021835B4 (en) * 2012-11-08 2015-02-05 Steelcase Werndl Aktiengesellschaft Sliding guide element and table top mounting system for sliding attachment of a table top
CN106808221B (en) * 2017-04-14 2019-12-06 华中科技大学 linear motion platform for heavy load

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2671184B2 (en) * 1993-05-17 1997-10-29 キタムラ機械株式会社 Sliding device
JPH10159846A (en) * 1996-11-29 1998-06-16 Okuma Mach Works Ltd Lubricating device for rolling guide plane
JP4557039B2 (en) * 2008-04-18 2010-10-06 株式会社ジェイテクト Guide device

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Publication number Publication date
WO2012086952A2 (en) 2012-06-28
WO2012086952A3 (en) 2012-09-07

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