TWI859626B - Roller bearings and cages with dust-proof parts - Google Patents

Abstract

The invention provides a roller bearings and cages with dust-proof parts, which mainly comprises an outer ring, forms a roller guide outer groove and two outer abutment at the radial inner ring side; an inner ring has a roller guide inner groove and two inner abutment formed on the outer ring side. The retainer is composed of two unit rings, each unit ring has an axial extension section and a closing edge formed with a plurality of roller limiter edges, and each axial extension section forms a joint end edge bent radially. A plurality of rollers is placed in the limiter edge of each roller. It is combined with two dust-proof parts of the retainer, and each dust-proof part includes a connecting part, an outward abutting part and an inward abutting part. The connecting part is combined and fixed on the connecting end edge of the retainer. The position of the outward abutting part corresponds to the outer abutment, and the position of the inward abutting part corresponds to the inner abutment.

Description

Roller bearing and retainer with dust shield

The present invention relates to a roller bearing, and more particularly to a roller bearing having a retainer combined with a dustproof part.

In the design of roller bearing structure, a retainer (also called a cage) is usually set up to allow the rollers in several interval rings between the inner and outer rings to reach a limited and stable state.

In addition to the inner and outer rings, rollers and retainers, roller bearings may also have dust-proof gaskets added to the annular axial gap between the inner and outer rings to achieve better structural sealing.

The conventional roller bearing structures currently available on the market, if they have both a retainer and a dust-proof gasket, are of a configuration type in which both components are assembled separately and independently. However, this type still has some problems in practical application. In terms of assembly, since the retainer and the dust-proof gasket need to be assembled separately and in sequence, it is difficult to further reduce the assembly time and cost. In terms of structural bonding strength, since the retainer and the dust-proof gasket are assembled separately and have no mutual connection and support relationship, the various bearing components lack a better bonding strength, which is indeed its imperfection.

The main purpose of the present invention is to provide a roller bearing and a retainer combined with a dustproof part. The technical problem to be solved is to explore and innovate a new roller bearing structure with a more ideal and practical performance.

Based on the above-mentioned purpose, the technical feature of the present invention to solve the problem is mainly that the roller bearing defines an axial direction and a radial direction orthogonal to the axial direction according to its assembly type; the roller bearing comprises: an outer ring, including a radial inner ring side, the radial inner ring side forms a roller guide outer groove, and the axial sides of the roller guide outer groove are formed with two outer assembly support parts; an inner ring, including a set of shaft inner edges and a radial outer ring side, the radial outer ring side forms a roller guide inner groove, and the axial direction of the roller guide inner groove is Two inner groups of supporting parts are formed on the two sides, and the roller guide inner groove and the roller guide outer groove on the radial inner ring side are in a corresponding relationship with the inner and outer ring intervals, and each inner group of supporting parts is in a corresponding relationship with each outer group of supporting parts, thereby defining an axial annular gap relatively therebetween; a retainer is composed of two unit rings, each unit ring has an axially extending section and a supporting edge, wherein the supporting edge forms a plurality of roller limiting edges, and the supporting edges of the two unit rings and each roller limiting edge are in a relative position relative to each other. In the abutting state, each axially extending section extends into the corresponding axial annular gap, each axially extending section forms a combined end edge that is bent in the radial direction, and the combined end edge is located in the axial direction corresponding to the inner group abutting parts and the outer group abutting parts; a plurality of rollers are accommodated in each roller limiting edge formed by each unit ring of the retainer, and each roller is limited between the roller guide outer groove and the roller guide inner groove; two dustproof parts are combined with the retainer, and each dustproof part is in the form of a closed ring It is made of elastic material, and each dust-proof part includes a connecting part, an outward abutting part and an inward abutting part, wherein the connecting part is used to be combined and fixed to the connecting end edge of the retainer, the position of the outward abutting part corresponds to the outer group abutting part, and the position of the inward abutting part corresponds to the inner group abutting part, thereby forming a configuration relationship of each dust-proof part in the corresponding axial annular gap, and making each dust-proof part move with one of the outer ring or the inner ring in operation, and present a staggered state relative to the inner ring or the outer ring.

The effects and advantages of the present invention mainly include the following: First, in terms of assembly: because the dustproof part and the retainer are combined into an integrated structure, the assembly time and cost can be further reduced, thereby achieving better industrial economic benefits. Second, in terms of structural bonding strength: because the dustproof part and the retainer are combined into an integrated structure, they can be connected and supported to each other to obtain better component integration strength, and for roller bearings with miniaturized specifications, a more stable and reliable structural strength state can be achieved.

Please refer to Figures 1 to 6, which are preferred embodiments of the roller bearing and the retainer combined with the dustproof portion of the present invention. However, these embodiments are for illustrative purposes only and are not limited to this structure in patent applications.

The roller bearing 100 defines an axial direction L1 and a radial direction L2 orthogonal to the axial direction L1 according to its assembly mode; the roller bearing 100 comprises: an outer ring 10, including a radial inner ring side 11, the radial inner ring side 11 forms a roller guide outer groove 12, the roller guide outer groove 12 The inner ring 20 includes an inner axial edge 21 and a radial outer ring side 22, wherein the radial outer ring side 22 forms a roller guide inner groove 23, and the roller guide inner groove 23 has two inner support portions 24 formed on the axial sides thereof. The roller guide inner groove 23 is in contact with the radial outer ring side 22. The roller guide outer groove 12 on the inner ring side 11 is in a corresponding relationship with the inner and outer ring intervals, and each inner group support portion 24 is in a corresponding relationship with each outer group support portion 13, thereby defining an axial annular gap 25 relatively therebetween; a retainer 30, composed of two unit rings 31, each of which has an axially extending section 32 and a close-fitting edge 33, wherein the close-fitting edge 33 forms a plurality of roller limiting edges 34, and the close-fitting edges 33 of the two unit rings 31 and each roller limiting edge 34 are in a state of relative abutment with each other, and each axially extending section 32 extends into the corresponding axis. In the annular gap 25, each of the axially extending sections 32 forms a radially curved joint edge 35, and the axial position of the joint edge 35 corresponds to the inner supporting parts and the outer supporting parts; a plurality of rollers 40 are accommodated in each of the roller limiting edges formed by each of the unit ring sheets 31 of the retainer 30, and each of the rollers 40 is limited between the roller guide outer groove 12 and the roller guide inner groove 23; two dustproof parts 50 are combined with the retainer 30, each of the dustproof parts 50 is in the form of a closed ring and is made of elastic material, and each of the dustproof parts 50 includes a connecting part 51, an outward A support portion 52 and an inward support portion 53, wherein the connecting portion 51 is used to be combined and fixed (for example, made by mold secondary injection molding technology) to the combined end edge 35 of the unit ring 31, the position of the outward support portion 52 corresponds to the outer assembly support portion 13, and the position of the inward support portion 53 corresponds to the inner assembly support portion 24, thereby constituting a configuration relationship in which each dustproof portion 50 is located in the corresponding axial annular gap 25, and each dustproof portion 50 moves with one of the outer ring 10 or the inner ring 20, and presents a staggered state relative to the inner ring 20 or the outer ring 10.

As shown in FIG. 4 , in this example, the coupling end edge 35 formed by the axially extending section 32 of the retainer 30 is a ring-shaped piece that is bent radially outward (in this example, bent at a 90-degree angle), so that the axial cross section of the connecting portion 51 of each dust-proof portion 50 is embedded in the coupling end edge 35 (in this example, a tiger's mouth-shaped covering type). In this example, each inner assembly supporting portion 24 is formed with a chamfer 245 (arc-shaped chamfer or oblique chamfer), and the inward abutting portion 53 of each dust-proof portion 50 is formed with an arc-shaped piece 535 to correspond to and abut against the chamfer 245. In addition, each outer supporting portion 13 is formed with an outer expansion groove 131, and the outer expansion groove 131 is formed with an inclined supporting wall 132. The inclined supporting wall 132 has an inner annular edge 133, and the diameter of the inner annular edge 133 is smaller than the diameter of the outward supporting portion 52 of the dustproof portion 50 (see Figures 4 and 5); in this example, the outward supporting portion 52 is configured to have an axial cross-section with a sharp angle, so as to abut against the inclined supporting wall 132. The detailed implementation of this example is not difficult to understand. The friction coefficient between the outer abutment portion 52 and the outer support portion 13 and the friction coefficient between the inner abutment portion 53 and the inner support portion 24 are different in size due to the difference in the friction coefficient. In addition, the dustproof portion 50 is a closed ring, so that each dustproof portion 50 follows the outer ring 10 (or inner ring 20) in operation. ) and one of them moves with the inner ring 20 (or the outer ring 10) and is in a misaligned state relative to the inner ring 20 (or the outer ring 10). In this way, the friction between the inner ring 20 and the outer ring 10 and the dustproof part 50 can be reduced to a minimum during the relative rotational movement; of course, because the roller bearing is usually filled with lubricating grease between its inner ring 20 and the outer ring 10, this is also one of the factors that prevent the friction from being too large during the aforementioned actuation state.

As shown in Figs. 1, 2 and 4, in this example, a roller assembly portion 14 is provided on one side of the outer ring 10. The roller assembly portion 14 is in the form of a radial hole and is sealed by a plug 15. Alternatively, the outer ring may also be composed of two half-ring bodies assembled and positioned, and one of the half-ring bodies can be disassembled to accommodate the roller (not shown in the drawings of this example).

Through the above-mentioned preferred embodiment structural assembly form and technical features, the roller bearing disclosed by the present invention is used as shown in Figures 1 to 6. Mainly through the form feature that the dustproof part 50 and the retainer 30 are combined into an integrated structure, the assembly time and cost of the roller bearing in the process can be further reduced, thereby achieving better industrial economic benefits; and because the dustproof part 50 and the retainer 30 are combined into an integrated structure, the two can be connected and supported by each other to obtain better component integration strength, especially for roller bearing products with miniaturized specifications, a more stable and reliable structural strength state can be achieved. In addition, the dustproof portion 50 should be able to play a role in guiding the concentricity of the assembly of the retainer 30 and effectively maintain the optimal assembly state between the retainer 30 and the inner ring 20 and the outer ring 10 (note: such as preventing direct contact).

In addition, the rollers 40 described in the present invention may be roller-shaped as shown in Figures 2 to 4, or may be ball-shaped as shown in Figure 7 as roller 40B. The preferred embodiment of the retainer 30 of the present invention is a two-unit ring 31 that is axially opposed and inserted, so it can adapt to common roller types, is more flexible, and is more practical and easy to use.

It is additionally pointed out that, according to the technical features and structural types disclosed in the present invention, the scope of the claims of the present invention should also include the structural type features that only the dustproof part 50 and the retainer 30 are combined into one body, as defined in the claims of the present invention, and the retainer 30 is specifically implemented, and the combination type of only a single unit ring 31 and the dustproof part 50 is not excluded. Of course, in the specific implementation of this type, it is necessary to consider whether the depth of the roller limiting edge 34 of the unit ring 31 is sufficient to stabilize the limiting roller 40, and this problem can be easily changed and overcome for those who are familiar with this technical field and have general knowledge.

100: Roller bearing L1: Axial L2: Radial 10: Outer ring 11: Radial inner ring side 12: Roller guide outer groove 13: Outer group support 131: Outer expansion groove 132: Inclined support wall 133: Inner ring edge 14: Roller assembly 15: Plug 20: Inner ring 21: Sleeve inner edge 22: Radial outer ring side 23: Roller guide inner groove 24: Inner group support 245: Chamfer 25: Axial annular gap 30: Retainer 31: Unit ring 32: Axially extended section 33: Abutment edge 34: Roller limiting edge 35: Joint end edge 40, 40B: Roller 50: Dust-proof part 51: Connecting part 52: Outward abutment part 53: Inward abutment part 535: Arc sheet Note: For the meanings of 3 and 6 in Figure 1 and 4 in Figure 3, please refer to the diagram for a brief explanation.

Figure 1 is a three-dimensional diagram of the combination of the preferred embodiment of the roller bearing of the present invention. Figure 2 is a three-dimensional diagram of the exploded embodiment of the roller bearing of the present invention. Figure 3 is a 3-3 cross-sectional view of Figure 1. Figure 4 is an enlarged view of the portion marked 4 in Figure 3. Figure 5 is a cross-sectional view of the exploded state of the local components of Figure 4. Figure 6 is a 6-6 cross-sectional view of Figure 1. Figure 7 is another embodiment diagram of the roller type in the present invention.

100: Roller bearings

L1: Axial

L2: radial

10: Outer Ring

11: radial to the inner ring side

12: Roller guide outer groove

13: External group leaning

14: Roller assembly

15: Plug cover

20: Inner Ring

21: Inner edge of the bushing

22: Towards the outer ring side

23: Roller guide inner groove

24: Inner group back part

245: Chamfer

30: Retainer

31: Unit ring

33: Close to the edge

34: Roller limit edge

40: Roller

50: Dust protection department

52: Outward abutment

53: Inward abutment

Claims (7)

A roller bearing defines an axial direction and a radial direction orthogonal to the axial direction according to its assembly type; the roller bearing comprises: an outer ring, comprising a radial inner ring side, the radial inner ring side forms a roller guide outer groove, and the axial sides of the roller guide outer groove form two outer assembly support parts; An inner ring, including a set of axial inner edges and a radial outer ring side, wherein the radial outer ring side forms a roller guide inner groove, and the two axial sides of the roller guide inner groove are formed with two inner group leaning parts, and the roller guide inner groove and the roller guide outer groove of the radial inner ring side are in an inner and outer ring interval corresponding relationship, and each inner group leaning part and each outer group leaning part are in an inner and outer ring interval corresponding relationship, thereby defining an axial annular gap relatively therebetween; A retainer, composed of two unit rings, each of which has an axially extending section and a contact edge, wherein the contact edge forms a plurality of roller limiting edges, and the contact edges of the two unit rings and the roller limiting edges are in a state of relative contact with each other, each of the axially extending sections extends into the corresponding axial annular gap, each of the axially extending sections forms a radially curved joint end edge, and the axial position of the joint end edge corresponds to the inner group contact parts and the outer group contact parts; A plurality of rollers are accommodated in the roller limiting edges formed by the unit rings of the retainer, and each roller is limited between the roller guide outer groove and the roller guide inner groove; and Two dust-proof parts are combined with the retainer, each of which is in the form of a closed ring and is made of elastic material, and each of which includes a connecting part, an outward abutting part and an inward abutting part, wherein the connecting part is used to be combined and fixed to the combined end edge of the retainer, the position of the outward abutting part corresponds to the outer group abutting part, and the position of the inward abutting part corresponds to the inner group abutting part, thereby forming a configuration relationship of each dust-proof part in the corresponding axial annular gap, and making each dust-proof part move with one of the outer ring or the inner ring in motion, and present a staggered state relative to the inner ring or the outer ring. As described in claim 1, the roller bearing, wherein each inner supporting portion is formed with a chamfer, and the inward supporting portion of each dust-proof portion is formed with an arc-shaped piece to correspond to and abut against the chamfer. As described in claim 1, each outer supporting portion forms an outer expansion groove, and the outer expansion groove forms an inclined supporting wall. The inclined supporting wall has an inner ring edge, and the diameter of the inner ring edge is smaller than the diameter of the outer supporting portion of the dustproof portion. As described in claim 1, a roller bearing is provided on one side of the outer ring, and the roller bearing is in the form of a radial hole and is sealed by a plug. As described in claim 1, the outer ring is composed of two half-rings assembled and positioned, and can be assembled into the roller by disassembling one of the half-rings. A retainer combined with a dustproof part, the retainer is used to be installed in a roller bearing structure, the roller bearing defines an axial direction and a radial direction orthogonal to the axial direction according to its assembly type; the retainer includes at least one single ring, the at least one single ring has a contact edge and an axial extension section, the contact edge is formed with a plurality of roller limit edges arranged in an interval ring, the axial extension section A coupling end edge bent in the radial direction is formed; a dust-proof part coupled to the unit ring sheet, the dust-proof part is in the form of a closed ring and is made of elastic material, each of the dust-proof parts includes a connecting part, an outward abutting part and an inward abutting part, wherein the connecting part is used to couple and fix to the coupling end edge of the retainer, and the positions of the outward abutting part and the inward abutting part correspond to the corresponding parts of the roller bearing. As described in claim 6, the retainer is combined with a dust-proof part, wherein the combined end edge formed by the axial section of the retainer is a ring-shaped piece that is bent radially outward, so that the axial cross-section of the connecting part of each dust-proof part is embedded in the combined end edge, and the inward abutment part is further formed with an arc-shaped piece, and the outward abutment part is configured to have a sharp axial cross-section.

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