WO2012015176A2

WO2012015176A2 - Conveyor roller

Info

Publication number: WO2012015176A2
Application number: PCT/KR2011/004815
Authority: WO
Inventors: 나복남
Original assignee: 대양롤랜트 주식회사
Priority date: 2010-07-27
Filing date: 2011-06-30
Publication date: 2012-02-02
Also published as: WO2012015176A3; KR20120010786A

Abstract

The present invention relates to a conveyor roller (100) comprising: a cylindrical roller casing (110) open at both ends thereof; a shaft (120) inserted in the roller casing (110) and forming the axis of rotation for the roller casing (110); and at least one bearing portion between the roller casing (110) and shaft (120). The bearing portion includes a first bearing (150) and a second bearing (160); the first bearing (150) has an outer wheel (151) that rotates integrally with the roller casing (110); the second bearing (160) has an inner wheel (161) that rotates integrally with the shaft (120); and the inner wheel (151) of the first bearing (150) and the outer wheel (161) of the second bearing (160) rotate integrally. Even if a bearing at one side is damaged so as to be not rotatable, the structure can continue to rotate, enabling the period of replacement and repair of the conveyor roller (100) to be extended; and because the first bearing and second bearing can distribute rotation amongst each other, heat generation from within is reduced, and accordingly, bearing damage from high heat can be prevented.

Description

Conveyor Roller

The present invention relates to a roller for a conveyor, and more particularly, to include a bearing portion consisting of a plurality of bearings between a roller tube and a shaft, so that a replacement or repair cycle of a bearing is lengthened, and the bearing shares rotation with the bearing. It relates to a roller for a conveyor that can reduce the heat generated by.

The roller conveyor apparatus which is widely used in the industrial field for conveying the object to be conveyed is provided with a plurality of conveyor rollers as one unit unit. 1 is a cross-sectional view showing a conveyor roller according to the prior art, Figure 2 is a cross-sectional view showing a conveyor roller according to another conventional technique, Figure 3 is a partial exploded cross-sectional view of the conveyor roller shown in FIG.

As shown in FIG. 1, the roller 1 for a conveyor according to the related art is open to both sides and is curved by bending both ends inward to form an inner ring flange 5-1 with a roller tube 5 having a circular hollow body. , An end cap 4 inserted into the inner ring flange 5-1 formed at both ends of the roller tube 5. The inner ring flange 5-1 of the roller tube 5 and the outer ring flange 4-1 of the end cap 4 which are connected to each other are welded from the outside to the roller tube 5 and the end cap by the welding part 6. 4) should be integrated. The shaft 2 is located inside the end cap 4 so that both ends thereof protrude from both ends of the roller tube 5, and the shaft 2 is formed with concave grooves spaced apart from both ends and the stopper ring 8 in the concave groove. Is inserted. A bearing 7 is provided between the end cap 4 and the shaft 2. The bearing 7 is provided in plural and located outwardly of the stopper ring 8, respectively. The shaft 2 is inserted into the bearing 7, and the bearing 7 is inserted into the end cap 4 to rotatably support the end cap 4 with respect to the shaft 2. The end cap 4 and the roller tube 5 rotate integrally.

A binding support ring 10 is provided on the axially outer side of each bearing 7. The binding support ring 10 is fixed to the inner stopper ring (13-1) and the outer stopper ring (13-2) is inserted into the end cap (4) on both sides in the axial direction, respectively, ) In the fixed position. A concave groove is formed in the inner diameter surface of the end cap 4 and the inner stopper ring 13-1 and the outer stopper ring 13-2 are inserted to be fixed to the end cap 4.

A sealing member 9 is provided on the axially outer side of each of the binding support rings 10. The shaft 2 is inserted into the sealing member 9 so that the sealing member 9 is fixed and rotates integrally with the shaft 2. The sealing member 9 is made of a rubber material and has a lip contacting the binding support ring 10 to prevent foreign matter from entering the bearing 7.

Figure 2 shows a conveyor roller 1 'according to the prior art of another structure, in which reference numeral 21 denotes a roller tube, 22 denotes a shaft, 23 denotes a bearing, 24 denotes an end cap, 28 A silver cover, 25 a housing member, 26 a stopper ring, and 29 a weld which joins the tubular body 21 and the end cap 24.

As shown in FIG. 3, the end cap 24 has an outer cylindrical portion 24-1 whose outer diameter surface is in contact with the roller tube 21, and an outer diameter surface whose outer diameter is the outer ring 23-1 of the bearing 23. It consists of the inner cylinder part 24-2 which contact | connects. The housing member 25 forms a cover 28 and a labyrinth seal, and has a cylindrical portion 25-1 and an inner annular portion 25-2 extending outward in a radial direction from one side of the cylindrical portion 25-1. ) And an outer annular portion 25-3 extending radially inwardly from the other side of the cylindrical portion 25-1 and having a plurality of protrusions 25-8. The housing member 25 is provided with a metal reinforcing member 25-7 in a direction in contact with the bearing 23. The reinforcing member 25-7 has an annular portion 1 for supporting the inner annular portion 25-2 of the housing member 25 in the axial direction from the inside, and a cylinder 2 for supporting the cylindrical portion 25-1 from the inner diameter side. And an annular two portion for supporting the outer annular portion 25-3 from the inside. The inner diameter surface of the two cylindrical portions of the reinforcing member 25-7 is in contact with the outer diameter surface of the outer ring 23-1 of the bearing 23. The inner diameter of the inner ring 23-2 of the bearing 23 abuts the shaft 22.

The cover 28 is inserted into the shaft 22 and has a plurality of uneven protrusions 28-1 protruding toward the housing member 25 in an annular portion extending outward in the radial direction. The uneven protrusions 28-1 of the cover 28 are located between the protrusions 25-8 of the housing member 25 to form a labyrinth seal. In FIG. 3, reference numeral 28-4 denotes an uneven portion formed on the inner diameter surface of the cover 28.

The stopper ring 26 is inserted into and fixed in the annular groove formed in the shaft 22, the bearing 23 is inserted into the shaft 22, and then the housing member 25 and the cover 28 are sequentially inserted into the shaft 22. Insert and position Then, the shaft 22 assembly (stopper 26, bearing 23, housing member 25) is positioned on the inner diameter side of the tubular body 21, and the end cap 24 into the tubular body 21 in the axial direction. After insertion, the end cap 24 and the tubular body 21 are welded to each other.

* The outer diameter surface of the outer cylindrical portion 24-1 positioned radially outward of the end cap 24 is in contact with the roller tube 21, and the inner diameter surface of the inner cylindrical portion 24-2 positioned radially inward. Is in contact with the housing member 25, and the axially inner end portion 24-3 of the inner cylindrical portion 24-2 is axially supported by the reinforcing member 25-7 in contact with the annular portion 25-2. .

The conveyor rollers shown in Figs. 1 to 3 are structured to rotatably support the roller tube with respect to the shaft with two bearings spaced apart at both ends in the axial direction. Therefore, if one or more of the bearings are damaged and do not rotate, there is a problem that the roller tube does not rotate with respect to the shaft. The roller tube and the bearing rotate at the same rotational speed. There is a problem in that the heat generated by the rotation to thereby damage the bearing early.

The present invention has been proposed in order to solve the above problems, it is possible to continue to rotate even when the bearing provided in the roller for the conveyor is damaged, since the structure can share the rotation of the roller tube, etc. An object of the present invention is to provide a roller for a conveyor that can generate heat of a bearing.

In order to achieve the above object, the present invention is a cylindrical roller tube penetrating to both sides, a shaft provided in the roller tube to form a rotation axis of the roller tube, and one or more bearings provided between the roller tube and the shaft Consists of wealth; The bearing unit includes a first bearing and a second bearing, the outer ring of the first bearing is provided to rotate integrally with the roller tube, the inner ring of the second bearing is provided to rotate integrally with the shaft, and the first bearing The inner ring of the outer ring and the outer ring of the second bearing provides a roller for the conveyor to rotate integrally.

The present invention further includes a support, wherein the support includes a first cylindrical portion inserted into an inner ring of a first bearing, a second cylindrical portion into which an outer ring of a second bearing is inserted, and the first cylindrical portion and a second cylindrical portion. An annular portion connecting the cylindrical portion, wherein a gap is formed between an inner diameter surface of the first cylindrical portion and an outer diameter surface of the shaft and a gap is formed between the outer diameter surface of the second cylindrical portion and the inner diameter surface of the roller tube. to provide.

In addition, the present invention provides a conveyor roller for contacting the inner ring of the first bearing to one side and the outer ring of the second bearing to the other side.

In addition, the present invention, the second cylindrical portion is provided with a projection extending in the radial direction at the inner end, the recess is formed in the radially inwardly concave groove is provided so that the projection is inserted into the groove portion and the outer diameter surface of the shaft It provides a roller for a conveyor further comprising an inner seal in contact.

In addition, the present invention provides a roller for a conveyor further comprising a sealing means between the roller body and the shaft in the axially outward direction of the bearing portion.

In the case of the conveyor roller 100 according to the present invention, it is provided with a bearing portion consisting of a plurality of bearings, and the inner ring of the first bearing and the outer ring of the second bearing are installed so as to rotate integrally, so that the bearing of any one side is damaged. Since the structure can be rotated even if it cannot be rotated, the replacement or maintenance cycle of the conveyor roller 100 becomes long, and the first bearing and the second bearing may share the rotation, thereby reducing heat generation inside. Therefore, there is an effect that the bearing due to high heat is prevented from being damaged.

1 is a cross-sectional view showing a roller for a conveyor according to the prior art,

Figure 2 is a cross-sectional view showing a roller for a conveyor according to the prior art,

3 is a partially exploded cross-sectional view of the conveyor roller shown in FIG.

Figure 4 is a cross-sectional view showing an embodiment of a roller for a conveyor according to the present invention,

It is a partially expanded sectional view of the roller for conveyors shown in FIG.

Figure 6 is a cross-sectional view showing a support provided in the roller for a conveyor of the present invention,

7 is a cross-sectional view showing another embodiment of a roller for a conveyor according to the present invention;

8 and 9 are partially enlarged cross-sectional views of the conveyor roller shown in FIG.

10 and 11 are cross-sectional views showing a modified example of the roller for a conveyor according to the present invention.

Hereinafter, with reference to the drawings will be described in detail a roller for a conveyor according to the present invention. Hereinafter, the present invention will be described with reference to the drawings, which is intended to more clearly describe the present invention, and the scope of protection of the present invention is not limited thereto.

4 is a cross-sectional view showing an embodiment of a roller for a conveyor according to the present invention, a partially enlarged cross-sectional view of the conveyor roller shown in Figure 4 in Figure 4, Figure 6 is a support provided in the conveyor roller of the present invention 7 is a cross-sectional view showing another embodiment of the roller for a conveyor according to the present invention, Figures 8 and 9 are partially enlarged cross-sectional view of the conveyor roller shown in Figure 7, Figures 10 and 11 Is sectional drawing which shows the modification of the roller for conveyors which concerns on this invention.

In the following description, the horizontal direction of FIG. 4 is referred to as the 'axial direction', and the vertical direction is referred to as the 'radial direction', and the direction toward the center of the shaft 120 in the axial direction is referred to as the 'axial direction inner' and the shaft 120 The direction toward both ends is referred to as 'axially outward', the direction toward the shaft 120 in the radial direction is referred to as the 'radial inward', and the direction away from the shaft 120 is referred to as 'radially outward'.

As shown in Figures 4 and 7, the conveyor roller 100 according to the present invention is a hollow cylindrical roller tube 110 penetrated to both sides, and the roller tube 110 is located in the roller tube 110 The shaft 120 and the one or more bearing portions provided between the roller tube 110 and the shaft 120 to form a rotation axis of the shaft, and the sealing means 130 is provided in the axial direction outward of the bearing portion. The roller tube 110 and the shaft 120 may be made of a metal with high corrosion resistance. A gap is formed in the radial direction between the inner diameter surface of the roller tube 110 and the outer diameter surface of the shaft 120, and a bearing part is installed at the gap. Both ends of the shaft 120 protrude from both ends of the roller tube 110.

In FIG. 4 and FIG. 7, reference numeral 140 illustrates an end cap 140 provided at an inner side of the roller tube 110 at both ends of the roller tube 110. The end cap 140 has a circular cross-section hollow tube. The end cap 140 has an inner cylindrical portion 141 extending in the axial direction on the inner diameter side, the outer diameter side is connected to the roller tube 110 by a method such as welding.

The bearing parts are provided in the shaft 120 spaced apart in the axial direction, and two bearing parts are provided to rotatably support the roller tube 110 with respect to the shaft 120. Two or more bearing parts may be provided.

As shown in FIGS. 4, 5, and 7 to 11, each bearing part includes a first bearing 150 and a second bearing 160, and an outer ring 153 of the first bearing 150. Is provided to rotate integrally with the roller tube 110, the inner ring 161 of the second bearing 160 is provided to rotate integrally with the shaft 120, the inner ring 151 of the first bearing 150 The outer ring 163 of the second bearing 160 is provided to rotate integrally. In FIG. 4, reference numeral 155 denotes a rolling element of the

first bearing

150, and 165 denotes a rolling element of the second bearing 160.

As shown in FIG. 4, the outer ring 153 of the first bearing 150 may be inserted into the inner cylindrical portion 141 of the end cap 140. The second bearing 160 is positioned axially inward of the first bearing 150, and the shaft 120 is inserted into the inner ring 161 of the second bearing 160. The outer ring 153 of the first bearing 150 rotates integrally with the roller tube 110, and the inner ring 161 of the second bearing 160 rotates integrally with the shaft 120.

A stopper ring 139 is provided spaced apart from both ends of the shaft 120 in the axial direction. A concave groove is formed in the outer diameter surface of the shaft 120 spaced apart from both ends of the shaft 120 in the axial direction, and a stopper ring 139 is inserted into each of the grooves and provided in the shaft 120. The stopper ring 139 serves to support the bearing portion in the axial direction from the inner side in the axial direction.

The inner cylindrical portion 141 of the end cap 140 is provided with an inner stopper ring 135 spaced apart from the axially outer end of the end cap 140 in the axial direction. A concave groove is formed in the inner diameter surface of the inner cylindrical portion 141 of the end cap 140, and an inner stopper ring 135 is inserted into the groove to be provided in the end cap 140. The inner stopper ring 135 serves to support the bearing in the axial direction from the outside.

A preload may be applied to the bearing part in the axial direction by the stopper ring 139 and the inner stopper ring 135.

A binding support ring 134 is inserted into the inner cylindrical portion 141 to the outside of the inner stopper ring 135, and the outer stopper ring 133 is axially outward of the inner cylindrical portion 141 of the end cap 140. ) Is provided. The binding support ring 134 is disposed between the inner stopper ring 135 and the outer stopper ring 133 to be fixed. The outer sealing member 137 is provided in the axially outer side of the binding support ring 134, both ends of the shaft 120 is inserted into the outer sealing member 137, the outer sealing member 137 is the shaft 120 It rotates integrally with the structure. The outer sealing member 137 has a lip protruding toward the binding support ring 134 to prevent foreign matter from invading the bearing portion, and may form the binding support ring 134 and the labyrinth seal. .

As shown in Figures 4 to 6, the conveyor roller 100 according to the present invention further includes a support (170). The support 170 includes a first cylindrical portion 171 inserted into the inner ring 151 of the first bearing 150 and a second cylindrical portion 175 into which the outer ring 163 of the second bearing 160 is inserted. And an annular portion 173 connecting the first cylindrical portion 171 and the second cylindrical portion 175 to the inner diameter surface 1711 of the first cylindrical portion 171 and the shaft 120. A gap is formed between the outer diameter surfaces and a gap is formed between the outer diameter surface of the second cylindrical portion 175 and the inner diameter surface of the roller tube 110. The support 170 rotates integrally with the inner ring 151 of the first bearing 150 and the outer ring 163 of the second bearing 160.

The annular portion 173 is in contact with the inner ring 151 of the first bearing 150 on one side and in contact with the outer ring 163 of the second bearing 160 on the other side. The annular portion 173 has a first jaw portion 1731 protruding in the direction of the first cylindrical portion 171 and contacting the inner ring 151 of the first bearing 150, and facing the second cylindrical portion 175. And a second jaw portion 1733 that protrudes toward the outer ring 163 of the second bearing 160. A gap is formed between the annular portion 173 and the outer ring 153 of the first bearing 150 and between the annular portion 173 and the inner ring 161 of the second bearing 160. In FIG. 6, reference numeral 1735 illustrates a third jaw portion that may be provided in the annular portion 173.

The second cylindrical portion 175 has a projection 1753 extending radially outward at its axially inner end. In the protrusion 1753, the recess 181 is formed to be concave radially inwardly so that the protrusion 1753 is inserted into the recess 181 and is in contact with the outer diameter surface of the shaft 120. It includes more.

Sealing means 130 is further included between the roller tube 110 and the shaft 120 in the axially outward direction of each bearing part to prevent foreign matter from entering the bearing part.

The lip portion of the outer sealing member 137 protruding toward the binding support ring 134 and the labyrinth sealing portion formed between the binding support ring 134 and the outer sealing member 137 form a sealing means 130.

5 and 6, reference numeral 1751 denotes a second inner diameter portion of the second cylindrical portion 175 which contacts the outer diameter surface of the outer ring 163 of the

second bearing

160, and 1713 denotes an inner ring of the first bearing 150 ( 151 shows a first outer diameter surface of the first cylindrical portion 171 in contact with the inner diameter surface.

7 to 9 illustrate a roller 100 for a conveyor having a different structure, wherein a first roller is formed between an inner cylindrical portion 141 of the end cap 140 and an outer diameter of the outer ring 153 of the first bearing 150. The cylindrical portion 1313 of the seal 131 is inserted. The first seal 131 has an outer annular portion 1311 extending radially inward at an outer end of the cylindrical portion 1313. In FIG. 8, reference numeral 132 illustrates a reinforcing member having a cylindrical portion 1323 positioned between the first seal 131 and the inner cylindrical portion 141 of the end cap 140. The reinforcing member 132 is preferably formed of a metal material.

The reinforcing member 132 includes an annular portion 1321 extending radially inward at the axially outer end and a support annular portion 1315 extending radially outwardly at the axially inner end. Between the supporting annular portion 1315 and the inner end of the inner cylindrical portion 141 of the end cap 140 is an inner annular portion 1315 extending radially outward at the inner end of the first seal 131. An axial gap is formed between the annular part 1321 and the first bearing 150 of the bearing part, and a first seal body 136 and a second seal body 138 forming a labyrinth seal part at the gap may be provided. . The first seal body 136 and the second seal body 138 have a plurality of protrusions in a direction toward each other, and a gap is formed between the protrusions to form a labyrinth seal part.

The first seal body 136 is provided to be in contact with the annular portion 1321 of the reinforcing member 132 outward in the axial direction and in contact with the outer ring 153 of the first bearing 150 in the axial direction inward.

The shaft 120 is inserted into the inner ring 161 of the second bearing 160 forming the bearing part, and the second bearing 160 is installed on the shaft 120 so that the inner ring 161 rotates integrally with the shaft 120. do. The outer ring 153 of the first bearing 150 is inserted into the reinforcing member 132, the first bearing 150 is installed so that the outer ring 153 rotates integrally with the reinforcing member 132. When the reinforcing member 132 is not provided, the outer ring 153 of the first bearing 150 may be inserted into the inner cylindrical portion 141 of the end cap 140. The first bearing 150 and the second bearing 160 are provided spaced apart from each other in the axial direction.

7 to 10, reference numeral 139 illustrates a stopper ring provided on the shaft 120 in the axial direction of the second bearing 160 to support the inner ring of the second bearing 160 in the axial direction. will be.

The roller 100 for a conveyor according to the present invention further includes a support 170 between the first bearing 150 and the second bearing 160 as shown in FIGS. 7 to 9. In addition, the support 170 may further include an inner seal 180 provided axially inward. The support 170 and the inner seal 180 are omitted as described above, and only the differences will be described in detail.

The first cylindrical portion 171 constituting the support 170 may extend beyond the first bearing 150 in the axial direction, and the outer annular portion 1311 of the first seal 31 may have an end thereof. 1 may be in contact with the first outer diameter surface 1713 of the cylindrical portion 171. A gap is formed between the first inner diameter surface 1711 of the first cylindrical portion 171 of the supporter 170 and the outer diameter surface of the shaft 120, and the outer diameter surface of the second cylindrical portion 175 and the roller tube ( A gap is also formed between 110).

The first cylindrical portion 171 of the supporter 170 is inserted into the inner diameter of the inner ring 151 of the first bearing 150 and is inserted into the outer ring of the second bearing 160 by the inner diameter of the second cylindrical portion 175. The 163 is inserted into an interference fit, and the support 170 is provided to rotate integrally with the inner ring 151 of the first bearing 150 and the outer ring 163 of the second bearing 160.

In FIG. 8, reference numeral 1371 denotes a shaft 120 that is inserted to rotate integrally with the shaft 120 and to the first outer diameter surface 1713 of the first cylindrical portion 171 of the support 170 in the axial direction. The second seal in contact is shown. In the above description, the first seal 131, the second seal 1371, the first seal 136, and the second seal 138 may be made of an elastomer such as silicone rubber or rubber.

10 and 11 illustrate a modified example of the roller 100 for a conveyor according to the present invention, any one or more of the first bearing 150 and the second bearing 160 constituting the bearing portion may be a roller bearing, It may be a ball bearing or a sliding bearing, not shown.

4 to 11, when the roller 100 for a conveyor having a bearing unit as shown in FIG. 11 is installed to rotate the roller tube 110 with respect to the shaft 120, the outer ring 153 of the first bearing 150 is rotated. The rotation and the inner ring 151 may also rotate in accordance with the rolling resistance of the first bearing 150. When the inner ring 151 of the first bearing 150 rotates, the outer ring 163 of the second bearing 160 also rotates by the rotation of the supporter 170.

For example, assuming that the roller tube 110 rotates at 10,000 RPM with respect to the shaft 120, the outer ring 153 of the first bearing 150 is rotated and the rolling of the first bearing 150 is rotated. If the inner ring 151 rotates at 3,000 RPM according to the resistance, the outer ring 163 of the second bearing 160 also rotates at 3,000 RPM. The rotational speed of the first bearing 150 is 7,000 RPM, and the rotational speed of the second bearing 160 is 3,000 RPM, so that the first bearing 150 and the second bearing 160 of the roller tube 110 You share the turn. Therefore, the effect of extending the life of the bearing occurs, the heat generated by the rotation of the bearing is reduced. In addition, even if the damage occurs in any one of the first bearing 150 and the second bearing 160 can not rotate because the remaining bearing can be rotated structure for the conveyor roller 100 to continue to use without replacement It becomes possible.

Claims

Cylindrical roller tube 110 penetrated to both sides, the shaft 120 is provided in the roller tube 110 to form a rotation axis of the roller tube 110, between the roller tube 110 and the shaft 120 It consists of at least one bearing portion provided in; The bearing part includes a first bearing 150 and a second bearing 160, the outer ring 151 of the first bearing 150 is provided to rotate integrally with the roller tube 110, the second bearing ( The inner ring 161 of the 160 is provided to rotate integrally with the shaft 120, and the inner ring 151 of the first bearing 150 and the outer ring 161 of the second bearing 160 rotate integrally. Roller 100 for the conveyor characterized in that.
The method of claim 1, further comprising a support 170, the support 170, the first cylindrical portion 171 is inserted into the inner ring 151 of the first bearing 150, the second bearing 160 A second cylindrical portion 175 into which the outer ring 163 is inserted, and an annular portion 173 connecting the first cylindrical portion 171 and the second cylindrical portion 175 to form the first cylindrical portion. A gap is formed between the first inner diameter surface 1711 of 171 and the outer diameter surface of the shaft 120, and a gap is formed between the outer diameter surface of the second cylindrical portion 175 and the inner diameter surface of the roller tube 110. Conveyor roller 100, characterized in that the.
The conveyor roller of claim 2, wherein the annular portion 173 is in contact with the inner ring 151 of the first bearing 150 on one side and the outer ring 163 of the second bearing 160 on the other side. 100.
The second cylindrical portion 175 has a protrusion 1753 extending radially from an inner end thereof, and the recessed portion 181 is formed to be concave radially inward so that the protrusion 1753. ) Is provided to be inserted into the recess 181 and the roller 100 for a conveyor, characterized in that it further comprises an inner seal 180 in contact with the outer diameter surface of the shaft (120).
The conveyor roller (100) according to claim 1, further comprising a sealing means (130) between the roller tube (110) and the shaft (120) outwardly of the bearing portion.