JPH06509628A - Bearings with lubricated spacers and non-lubricated spacers - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Bearing technology field with lubricated spacers and non-lubricated spacers The present invention provides that the roller element absorbs the lubricant transferred from the spacer containing the lubricant. The present invention relates to self-lubricating bearings of the type that are lubricated accordingly.

Background of the invention U.S. Pat. No. 4,906,110 discloses that the rollers are separated by floating lubrication spacers. An improved solid lubricated roller bearing is also disclosed. The present invention utilizes this type of bearing. Aimed at increasing longevity and stability.

Summary of the invention According to the invention, lubricated and non-lubricated spacer elements are arranged between the rollers. , providing solid lubricant and stability to each roller. Non-lubricated spacer element above Although the material has favorable anti-friction properties, firstly, it has a spacer effect. I have only one. Lubricated elements are floating, non-lubricated elements are floating or part of the cage. Non-lubricated elements are floating elements When the lubricating spacer element is The sliding spacer elements are arranged alternately, and the roller trajectory engaging portions are arranged alternately with sliding spacer elements. When rotating, it is lubricated by direct contact with the lubricating spacer element.

The non-lubricating spacer assists in spreading the lubricant on the rollers provided by the lubricating spacer. Provides stability of the rollers in areas not provided. Non-lubricated spacer floating element In a device in which there is a Preferably, the sliding end spacer is provided with a central non-lubricating spacer facing the pond side. 5. When the cage is equipped with non-lubricated spacers, approximately the center of each roller The portions face lubricating spacer elements on both sides.

Brief description of the drawing FIG. 1 shows a typical example of a spacer and a roller element to which the present invention can be applied. FIG. 3 is a side view of the exterior of the assembly.

FIG. 2 is an end view of the assembly with the annular end ring removed.

FIG. 3 is a detailed end view identical to FIG.

FIG. 4 is a full-scale exploded view of a portion of a bearing constructed in accordance with the present invention.

FIG. 5 is a full-scale exploded view of the slide and roller of the preferred embodiment.

FIG. 6 is an explanatory diagram showing another embodiment of a spacer used together with a roller.

FIG. 7 is a cutaway plan view of a second embodiment of the invention that utilizes a cage.

FIG. 8 is a cross-sectional view taken along line 8-8 of FIG.

FIG. 9 is a cutaway end view of the second embodiment.

Detailed description of the invention Figure 1 and figure? (2) floating spacers I with a solid lubricating mixture are The rotating needle 02 is separated. Each floating spacer I is preferred (7 is machined) Alternatively, it may be molded to have a concave surface with a curvature similar to the outer surface 4 of the needle-shaped (H7). It has a relatively large initial contact for moving the solid lubricant. provide a tactile area. .

The outer surface 6 and the inner surface 7 of the floating spacer l each have an inner surface determined to have a diameter of 8.9 mm. Matches the curvature of the side and outer raceways (molded or machined to match the 7 convex curvatures) The outer surface 6 and the inner surface 7 may be flat or Two-line contact with the outer raceway along the length of 6 and both longitudinal edges of the inner surface 7 with a single tangential contact midway between the inner orbits. End lubrication of rotating element 2 , for example, a solid lubricant disposed near the ends of the rotating element 2 and the spacer 1. by an annular ring 100 or attached to the end of the rotating element 2. Alternatively, the end of the rotating element 2 may be coated with solid lubricant. This is done by the end of the spacer 1 which wraps around the area.

In order to keep the cost economical, the spacer l requires high pressure compaction and additional processing. It is desirable to form it by a secondary sintering process which eliminates the need for it. Both sides of each roller The connection at the contact end of adjacent spacer elements on the side connects the ends of the rollers. each part around the roller is fitted with a spacer element during rotation of the roller. come into direct contact with the object. This end may be configured, for example, by bevelling the adjacent end of the spacer. By this, an inclined end surface can be provided. This configuration allows the The bond line between the respective spacer elements on each side of the roller should be It makes a difference.

See Figure 3 (7), the recess 10 with an angle 11 is preferably inside the spacer element 2 along a plane 12 passing through the central axis of the element 2. Provided for. This concavity angle 11 corresponds to the rotational axis of the bearing and the adjacent rotating element 2. is measured with respect to the plane 13 passing through the axis of rotation, typically having a value of 30 degrees; Wear particles separated from the spacer are of the smallest size, ensuring smooth bearing operation. Avoid interference. Recesses also provide small, unconstrained pockets of moving lubricant. The rotary element and the swivel against the apex of the concavity angle 11 Under the compressive action that occurs between the particles and the spacer, the particles are recombined into the body of the spacer. let

Another embodiment of the spacer element IO is as shown in FIG. becomes approximately concave. This variant allows wear particles to be removed during relative movement of the surfaces of the assembly. Rather than being trapped, it facilitates being trapped within the recess lO'.

According to the invention, a non-lubricating spacer is also provided, and a solid lubricating material (lubricating spacer element) is also provided. A spacer element that contains and preferably a spacer element (non-contact) that can resist wear due to contact with the rollers. Lubricating spacer elements) are arranged alternately. If lubricated spacer and non-lubricated spacer If the pacers are both floating, they are preferably aligned axially with the roller and bearing assembly. They are arranged alternately in both circumferential directions of rotation of the entire body. This arrangement Non-lubricating spacers ensure proper alignment of the roller elements when the pacers wear. Column conditions and spacing are maintained. In this regard, the initial interval is It is determined that only the lubricating spacer is in contact with the roller until the spacer wears out. It will be done.

The preferred material for non-lubricated spacer elements is a hard abrasive material such as a ceramic material. Polymide material without lubricant, regardless of material , steel, silver-gold immersed copper, phenolic materials, nylon, etc. Non-lubricated spacer element Under low load conditions, the It is made of relatively soft material such as iron.

Lubricated spacer element and non-lubricated spacer element indicated by 101S 102 The basic arrangement of elements is shown in FIG. 4 with respect to adjacent spacers. Spacer la is, for example, a pair of lubricating elements separated by a non-lubricating spacer element 102. It has a lubricating spacer element 101, while spacer lb has a lubricating spacer element 101. A pair of non-lubricated spacer elements 10 separated by a spacer element 101 2'. Each of the lubricated spacer elements preferably has a non-lubricated spacer element. - longer than the spacer element, the entire length is in constant contact with the lubricated spacer element . However, the lubricant spreads across the trajectory and roller as the roller rotates. The arrangement described above is not critical.

The alternating arrangement of lubricated and non-lubricated spacer elements shown in Figure 4 is , each roller (e.g. roller 2') has a one with a non-lubricated roller element 102' in the vicinity and one with a medium on the other side of the roller. A central non-lubricated roller element 102 is provided. This is because the stability of the roller is secured by sliding spacers.

Referring to FIG. 5, the spacer lc has a concave end where the roller fits. End lubrication of the roller 2 can be provided by covering the . Further, the roller 2 includes a series of roller elements 2a whose end faces abut against each other. Contains. As shown in the example of FIG. 4, the non-lubricated spacer element Arranged alternately with saelements. On one side of the rotating element 2, The spacer lc is connected to the pair of shorter non-lubricated spacers in the spacer ld on the other side. element 102' and a pair of lubricating spacer elements 101'' facing each other. ing. Furthermore, within the spacer ld, a central lubricating spacer element lot"' is opposite the central non-lubricated spacer element 102°°' in the spacer lc. There is.

In the embodiment shown in FIGS. 4 and 5, the spacers la to 1d each have three spacers. It is shown to consist of a pacer element. The larger the number of each spacer, the better preferably an odd number of spacer elements, which are (a) lubricating spacers; The elements must alternate with non-lubricated elements in the spacer, and (b) A lubricated spacer element in each spacer is a non-lubricated spacer in an adjacent spacer. Understand that it is possible to arrange such that elements are placed opposite each other can.

The lubricating spacer element is manufactured by DuPons, which has the U.S. Regulation R46198. Vespel® SP-2t ports manufactured and commercially available Produced by Limid. Mouth products are not soft, have high temperature resistance, and can withstand many drops. Withstands loads at temperatures in excess of those reached by plastic materials, and is extremely Exhibits small gradual movements. For example, if the product is 2,500p at 300°C (572°F) Even after 100 hours of si load, the overall deformation was only 1. It is 6%. Ves Pel (registered trademark) SP-21 is similar to graphite and Teflon (registered trademark). It has a polymide matrix containing a dispersion of various solid lubricating substances. Lubricant The pacer element is made by high-pressure compression and secondary sintering of Vespel (registered trademark) powder. made by. Maximum strength and minimum thermal expansion are usually perpendicular to the direction of compression. be discovered. Vespel (registered trademark) SP-21 has a spacer element. Manufactured and used at low temperatures. Initially between the lubricating spacer element and the roller The tolerance is smaller than the tolerance between the non-lubricated spacer and the roller. Lubricate after use Lubricant from spacer element onto roller and non-lubricated spacer element spread.

Referring to FIGS. 7-9, the non-lubricated spacer is provided by a retainer 200; The retainer 200 is a non-lubricated spacer element that protrudes inward parallel to the axis of the bearing. 202 with end rings 200a, 200b. roller element 2 has opposing end portions disposed between circumferentially adjacent spacer elements 2; The floating lubricated spacer element 201 is connected between the roller element 2 and the non-lubricated spacer element 201. Disposed between the ends of pacer element 202. to the connecting element 203 Therefore, the end rings 200a, 200b have elements 202 on both sides. Concatenated. These connecting elements 203 are connected by lubricating spacers on the circumference of the bearing. elements 201 or smaller connecting elements 203 Spaced apart, more lubricating spacer elements are provided. Needle roller The elements are usually slightly tapered inwardly towards the ends; The track-engaging portion of the roller element is typically central to its length. Therefore, lubrication The spacer element 201 is used for lubricating the working parts of the roller element. while the non-lubricated spacer elements ensure proper alignment of the roller elements. Hold. However, during operation, lubricant from normally lubricated spacer elements moves over the entire length of the roller element.

Retainer 200 is typically constructed from two halves that are initially flat. Laurae element and lubricated spacer element when the cage halves are still flat. Each half of the cage is then bent into a semi-cylindrical shape. Next to the cage The cross-sectional shape of the non-lubricated spacer elements in the orientation is such that the above half parts are in their final shape. shaped to hold the end of the roller element after it has been bent. retainer is made of silver-infused copper or other suitable material.

It is desirable to maximize the surface of the lubricated spacer element that initially contacts the roller. However, this is not important. Therefore, the lubricating spacer element , for example with a square or trapezoidal cross section.

Although I have shown and described particular embodiments of my invention, it is clear from the appended claims that Numerous minor structural and operational changes may be made without departing from the spirit of the invention. It is clearly possible.

7iC 'a2.21. = Heisei Year Month Day

Claims (13)

[Claims] 1. A bearing, a device for forming an orbit; A plurality of rotating elements in said orbit and said rotation to maintain a predetermined minimum spacing. a non-rotating element in the orbit between the rotating elements; a lubricating spacer element in said raceway between said rotating elements, said The lubricating element is suspended relative to the rotating element and the non-rotating spacer element. A bearing characterized in that it has the above-mentioned lubricating spacer element which is flexible. 2. The non-rotating spacer element is free to float between the rotating elements. The bearing according to claim 1, characterized in that: 3. Claim characterized in that the retainer is provided with the above-mentioned non-rotating spacer element. Bearing according to item 1. 4. The non-rotating spacer elements are arranged at both ends of the lubricating spacer. The bearing according to claim 1, characterized in that: 5. The above-mentioned lubrication spacer element provides almost all the lubrication of the rotating surface of the above-mentioned rotating element. A bearing according to claim 1, characterized in that it provides the following: 6. There is a gap between the rotating element and the non-rotating spacer element. The bearing according to claim 1, characterized in that: 7. The orbit is formed by a circular inner and outer trajectory, and the rotating element the lubricating spacers are generally barrel-shaped, each having a center of locus engagement; The element is placed between the above-mentioned centers of the lubricating rotating elements and applies lubricant thereto. Apply the lubricating spacer element so that the non-rotating spacer element is on the end side of the lubricating spacer element. 2. The bearing according to claim 1, wherein the bearing is disposed at a. 8. The non-rotating spacer element is in contact with both ends of the rotating element. Claim 7, characterized in that it is part of a retainer having an end ring disposed thereon. mounted bearing. 9. The orbit is circular, and the rotating element is located at the center of the rotating element. The above spacer elements alternate with each other, and the above rotating elements are arranged on top. The above non-rotating spacer element and the lubricated spacer element whose ends meet at the center 2. The bearing according to claim 1, wherein the bearings are arranged alternately. 10. the orbit is circular and the rotating element has at least three non-rotating a spacer element and at least two lubricating spacer elements; 2. The bearing according to claim 1, wherein the bearing is disposed in a. 11. A bearing, a device for forming an orbit; a plurality of rollers in the orbit; between the rollers, the rails facing each other for only part of the length of the rollers; a non-rotating spacer element in the path that maintains the alignment of the rollers; To, within the orbit between the rollers and only for a portion of the length of the rollers. The floating roller lubrication element in the above track, which is facing towards the Mento and A bearing characterized by having: 12. A bearing, Laura and floating spacers separating said rollers, each of said floating spacers having alternating ends; A lubricated spacer element and a non-lubricated spacer element placed end-to-end with including a total of at least three spacer elements within each spacer, each The alternating order of lubricated and non-lubricated elements of the spacer is reaching each other for an alternating order of a lubricating spacer element assembled from two adjacent spacers such that said floating spacer providing lubrication over substantially its entire length. Received. 13. Each lubricating spacer element in each spacer has one or two lubricating spacer elements in each spacer. 13. Adjacent to two non-lubricated spacer elements. bearings.