JP2006250187A - Flat bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To equalize the load applied to a plurality of rollers composing groups by relieving the load applied to each roller. <P>SOLUTION: A plurality of rollers 3a, 3b, 3c and 3d are arranged in parallel rotatably in the axial direction between an upper raceway plate 1 and an upper raceway plate 2. A plurality of the rollers 3a, 3b, 3c and 3d composing each group are set to have different diameters. That is, the diameter dimensions of the rollers 3a, 3b, 3c and 3d differ a little in the part to be greatly applied by the load, and the part not to be so. Therefore, even the load which becomes greater from a left side to a right side, each roller 3a, 3b, 3c and 3d can be relieved in stress distribution. Then, the load applied to the rollers 3a, 3b, 3c and 3d is relieved, so that the load applied to plurality of the rollers 3a, 3b, 3c and 3c can be equalized. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  In the present invention, a plurality of rollers are arranged between a pair of raceway plates so as to be able to roll in parallel in the axial direction, and a plurality of rollers each forming a set along the rolling direction. The present invention relates to a flat bearing provided.

  In a flat bearing, a plurality of (for example, four) rollers are arranged in parallel in the axial direction between a pair of raceway plates so as to be freely rollable. A plurality of sets are provided along the direction.

  Conventionally, the rollers used for the flat bearings are all the same size rollers, and the rolling surfaces have been partially crowned.

  In recent years, there has been a demand for a flat bearing capable of receiving the same load even when the installation space becomes narrow.

  For this reason, the number of rollers may have to be reduced in spite of receiving the same load. In such a case, the load applied to one roller increases, and depending on conditions, the roller may be deformed or cracked due to insufficient strength.

  Moreover, since the load to each roller of a flat bearing becomes non-uniform | heterogenous at the time of use, the roller which applies a big load may be easy to damage early.

  The present invention has been made in view of the circumstances as described above, and is a flat bearing that can alleviate the load applied to each roller and equalize the load applied to a plurality of rollers forming each set. The purpose is to provide.

In order to achieve the above object, a flat bearing according to claim 1 of the present invention has a plurality of rollers arranged in parallel in the axial direction between a pair of raceways so as to be capable of rolling. In a flat bearing in which a plurality of sets of individual rollers are provided along the rolling direction,
The plurality of rollers forming each set are characterized in that their diameters are set differently.

In the flat bearing according to claim 2 of the present invention, a plurality of rollers are arranged between a pair of raceway plates so as to be able to roll in parallel in the axial direction. In flat bearings provided in multiple sets along the rolling direction,
Each roller is characterized by crowning continuously connected by an arc shape having two or more curvature radii.

In the flat bearing according to claim 3 of the present invention, a plurality of rollers are arranged between a pair of race plates so as to be able to roll in parallel in the axial direction. In flat bearings provided in multiple sets along the rolling direction,
The plurality of rollers forming each group have different diameters, and
Each roller is characterized by crowning continuously connected by an arc shape having two or more curvature radii.

  The flat bearing according to claim 4 of the present invention is characterized in that each roller is provided with identification means for identifying each roller.

  According to the present invention, the plurality of rollers forming each group have different diameters, and each roller is continuously connected by an arc shape having two or more radii of curvature. Therefore, the load applied to each roller can be relaxed and the load applied to the plurality of rollers forming each set can be equalized.

  Hereinafter, a flat bearing according to an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a plan view of a flat bearing according to a first embodiment of the present invention.

  2A and 2B are cross-sectional views taken along line II-II in FIG. 1, respectively. FIG. 2A shows a conventional example, and FIG. 2B shows the first embodiment.

  As shown in FIG. 1, in a flat bearing, a plurality of (for example, four) rollers 3a, 3b, 3c, 3d are axially arranged between a pair of race plates (upper race plate 1 and lower race plate 2). It is arranged so that it can roll in parallel.

  Further, a plurality of rollers 3a, 3b, 3c, and 3d, each of which forms a set, are provided in a plurality of sets in two rows along the rolling direction.

  In the case of the conventional example of FIG. 2A, the rollers 3a, 3b, 3c and 3d are all set to have the same diameter.

  As a result, as shown in FIG. 2A, in the case of the conventional example, when a load that increases from the left side to the right side acts, the load may concentrate on the relatively right roller 3d.

  On the other hand, in the present embodiment, as shown in FIG. 2B, the plurality of rollers 3a, 3b, 3c, 3d forming each group are set with different diameters.

  That is, the diameters of the rollers 3a, 3b, 3c, 3d are slightly changed between a portion where the load is large and a portion where the load is not large.

  Therefore, as shown in FIG. 2B, even if a load that increases from the left side to the right side acts, the stress distribution of each roller 3a, 3b, 3c, 3d can be relaxed. Therefore, the load applied to each roller 3a, 3b, 3c, 3d can be relieved, and the load applied to the plurality of rollers 3a, 3b, 3c, 3d forming each set can be equalized.

(Second Embodiment)
FIG. 3A is a side view of a roller according to a conventional example, and FIG. 3B is a side view of a roller according to a second embodiment of the present invention.

  4 (a) and 4 (b) are graphs showing the load distribution to the rollers, (a) shows a conventional example, and (b) shows the first embodiment.

  In the case of the conventional example of FIG. 3A, the rolling surface of the roller 3 is crowned by an arc shape having one radius of curvature (R1).

  In contrast, in the present embodiment, the rolling surface of the roller 3 is provided with a crowning continuously connected by an arc shape having two or more curvature radii (R1, R2). The arc-shaped curvature radii R1, R2, etc. are as shown in FIG.

  That is, in order to receive the rolling element (roller) load to the maximum, the rolling surface of the roller 3 is subjected to a crowning or the like having a logarithm or a shape close to a logarithm.

  As a result, in the case of the conventional example, the load distribution on the roller 3 is as shown in FIG. 4A, and the maximum value is MAX. P1.

  On the other hand, in the case of the present embodiment, the load distribution to the roller 3 is as shown in FIG. 4B, and the maximum value is MAX. P2.

MAX. P1> MAX. P2
Therefore, in this embodiment, the stress distribution of each roller 3 can be relaxed, the load applied to each roller 3 can be relaxed, and the load applied to the plurality of rollers 3 constituting each group can be equalized. can do.

(Third embodiment)
FIG. 5A is a front view and a side view of a roller according to a third embodiment of the present invention, and FIG. 5B is a front view of a roller according to a first modification of the third embodiment of the present invention. It is a figure and a side view.

  FIG. 6A is a front view and a side view of a roller according to a second modification of the third embodiment of the present invention, and FIG. 6B is a third modification of the third embodiment of the present invention. It is the front view and side view of the roller which concern on.

  FIG. 7A is a front view and a side view of a roller according to a fourth modified example of the third embodiment of the present invention, and FIG. 7B is a fifth modified example of the third embodiment of the present invention. It is the front view and side view of the roller which concern on.

  In the present embodiment shown in FIG. 5A, when the cage is taken out from the flat bearing, the rollers 3 fall apart, so that the size of the rollers 3 can be identified.

  That is, in the present embodiment, an arcuate groove 4 for identification is formed on the end surface of the roller 3.

  In the example of FIG. 5B, a double arc-shaped groove 5 for identification is formed on the end face of the roller 3.

  In the example of FIG. 6A, an identification oval groove 6 is formed on the end face of the roller 3.

  In the example of FIG. 6B, two linear grooves 7 for identification are formed on the end surface of the roller 3.

  In the example shown in FIGS. 7A and 7B, the length of the roller 3 is made shorter and longer to be identified.

  In the present embodiment, the number of identification grooves 4 to 7 may be one or more. Moreover, it does not need to be an ellipse or a circular arc shape.

  In addition, this invention is not limited to embodiment mentioned above, A various deformation | transformation is possible.

It is a top view of the flat bearing which concerns on 1st Embodiment of this invention. (A) (b) is sectional drawing along the II-II line of FIG. 1, respectively, (a) shows the former, (b) shows 1st Embodiment. (A) is a side view of the roller which concerns on a prior art example, (b) is a side view of the roller which concerns on 2nd Embodiment of this invention. (A) (b) is a graph which shows the load distribution to a roller, (a) shows a prior art example, (b) shows 1st Embodiment. (A) is the front view and side view of the roller which concern on 3rd Embodiment of this invention, (b) is the front view of the roller which concerns on the 1st modification of 3rd Embodiment of this invention, and It is a side view. (A) is the front view and side view of a roller which concern on the 2nd modification of 3rd Embodiment of this invention, (b) concerns on the 3rd modification of 3rd Embodiment of this invention. It is the front view and side view of a roller. (A) is the front view and side view of a roller which concern on the 4th modification of 3rd Embodiment of this invention, (b) concerns on the 5th modification of 3rd Embodiment of this invention. It is the front view and side view of a roller.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper track plate 2 Lower track plate 3, 3a, 3b, 3c, 3d Roller 4 Discrimination arc-shaped groove 5 Discrimination double arc-shaped groove 6 Discrimination elliptical groove 7 Identification linear shape Groove

Claims (4)

A flat in which a plurality of rollers are arranged so as to be able to roll in parallel in the axial direction between a pair of raceway plates, and a plurality of sets of these rollers are provided along the rolling direction. In bearings,
A flat bearing characterized in that a plurality of rollers forming each group have different diameters. A flat in which a plurality of rollers are arranged so as to be able to roll in parallel in the axial direction between a pair of raceway plates, and a plurality of sets of these rollers are provided along the rolling direction. In bearings,
A flat bearing characterized in that each roller is provided with a crowning continuously connected by an arc shape having two or more radii of curvature. A flat in which a plurality of rollers are arranged so as to be able to roll in parallel in the axial direction between a pair of raceway plates, and a plurality of sets of these rollers are provided along the rolling direction. In bearings,
The plurality of rollers forming each group have different diameters, and
A flat bearing characterized in that each roller is provided with a crowning continuously connected by an arc shape having two or more radii of curvature.   The flat bearing according to any one of claims 1 to 3, wherein each roller is provided with identification means for identifying each roller.

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