Method of weaving a toroidal pad and knuckle bearing

Abstract

The application discloses a kind of cambered surface pad weaving method and knuckle bearing, it is related to bearing fitting technical field, with bearing inner ring as the support mold of cambered surface pad, support mold both ends are equipped with annular weaving board, annular weaving board inside has evenly distributed tooth, the first tooth side of tooth is one side, the other side is second tooth side;With warp from the first tooth side of any tooth of first end annular weaving board and then from the second tooth side, after the two sides of the corresponding tooth of second end annular weaving board are threaded, then again from the two sides of adjacent tooth of first end annular weaving board are threaded, until weaving a circle around annular weaving board;Weave with weft with warp as reference around support mold: with weft from under warp, then again from above warp and weave.This application can avoid the damage to pad cambered surface part organization in the process of making, guarantee the use performance of bearing pad, and can guarantee the continuity and convenience of cambered surface pad in processing and use process.

Description

Technical Field

[0001] This invention relates to the field of bearing accessories technology, and in particular to a method for weaving arc-shaped gaskets and a spherical bearing. Background Technology

[0002] Fabric gaskets, as an important component of spherical plain bearings, are typically bonded to the inner surface of the outer ring. Their friction-reducing and wear-resistant properties directly determine the lifespan of the spherical plain bearing. Since a spherical plain bearing consists of two parts, an inner and an outer ring, with both the outer and inner surfaces of the inner and outer rings being spherical, contact between the inner and outer rings during bearing operation is achieved through these spherical surfaces. When using flat bearing gaskets, issues such as uneven surfaces and edge wrinkles arise. Under conditions of high load and high oscillation frequency, poorly bonded gaskets can easily detach from the bonding surface or even slip off. Their poor adhesion to curved surfaces can cause the inner and outer rings to jam, leading to spherical failure. Therefore, using curved bearing gaskets can significantly improve these defects.

[0003] Existing curved bearing gaskets are usually made using curved extrusion molding technology. During the extrusion process, as the curved die gradually approaches the gasket, it will generate tearing and extrusion forces on the top of the gasket to form a curved surface. This force can easily disrupt the stress balance of the gasket, damage the continuity of the gasket material, and affect the working performance of the gasket. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a method for weaving arc-shaped gaskets and a spherical bearing, which can avoid damage to the arc-shaped part of the gasket during the manufacturing process, ensure the performance of the bearing gasket, and ensure the continuity and convenience of the arc-shaped gasket in the processing and use process.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] In a first aspect, embodiments of the present invention provide a method for weaving an arc-shaped gasket, using the inner ring of a bearing as a support mold for the arc-shaped gasket. Both ends of the support mold are provided with annular braiding plates, and the inner side of the annular braiding plates has uniformly distributed teeth, one side of which is a first tooth side and the other side is a second tooth side.

[0007] The weaving method includes:

[0008] The warp yarn is inserted into the first tooth side of any tooth of the first end ring braiding plate and then out from the second tooth side. Then the warp yarn is inserted into the corresponding teeth of the second end ring braiding plate from both sides, and then out from the adjacent teeth of the first end ring braiding plate from both sides, until it is braided around the ring braiding plate once.

[0009] The weft yarn is woven around the support mold with the warp yarn as the reference: the weft yarn passes under the warp yarn and then passes over the warp yarn to weave, completing the first layer of the padding.

[0010] As a further implementation, the curved pad is a single-layer or multi-layer woven structure.

[0011] As a further implementation, when the arc-shaped pad has at least two layers of woven structure, the weft yarn is woven around the support mold with the warp yarn as the reference, and then the second layer of warp yarn is woven; the second layer of weft yarn passes under the first layer of warp yarn and then passes over the second layer of warp yarn for weaving.

[0012] As a further implementation, the weaving method of the first layer of padding is repeated until the set number of layers is completed.

[0013] As a further implementation, a multi-layered weaving structure is formed by adding warp layers.

[0014] As a further implementation, the thickness of the arc-shaped pad is 0.1mm-1mm.

[0015] As a further implementation, the tooth pitch of the annular braided plate ranges from 8 teeth per 25.4 mm to 20 teeth per 25 mm, and the tooth depth of the annular braided plate ranges from 1.2 mm to 5 mm.

[0016] As a further implementation, the warp and weft yarns are yarns made of a blend of polytetrafluoroethylene and aramid fibers.

[0017] Secondly, embodiments of the present invention also provide a spherical bearing, including an inner bearing ring, an outer bearing ring, and a bearing liner disposed between the two, wherein the bearing liner is an arc-shaped liner made by the aforementioned weaving method.

[0018] As a further implementation, the arc-shaped gasket is adhered to the inner surface of the bearing outer ring using epoxy resin adhesive.

[0019] The beneficial effects of this invention are as follows:

[0020] (1) The present invention uses the inner ring of the bearing as a support mold and installs annular braiding plates at both ends of the support mold. The warp and weft threads are braided along the teeth of the annular braiding plates. The operation is simple and can adhere to the surface of large curved surfaces. It has a good conformability and can avoid the pulling damage of the arc surface of the liner to the extrusion molding, thus ensuring the performance of the bearing liner.

[0021] (2) The present invention is prepared by mixing two types of fiber yarns, which has high friction and lubrication properties and can meet the wear resistance requirements of bearings during operation.

[0022] (3) The padding roll formed after the invention is woven can be cut to the required length, which is convenient, quick and easy to use and does not cause waste. Attached Figure Description

[0023] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0024] Figure 1 This is a schematic diagram of the joint bearing structure according to one or more embodiments of the present invention;

[0025] Figure 2 This is a schematic diagram of the outer ring of a spherical bearing according to one or more embodiments of the present invention;

[0026] Figure 3 This is a schematic diagram of a support mold according to one or more embodiments of the present invention;

[0027] Figure 4 This is a schematic diagram of the annular braided plate structure according to one or more embodiments of the present invention;

[0028] Figure 5(a) is a top view of the arc-shaped pad weaving process according to one or more embodiments of the present invention;

[0029] Figure 5(b) is a front view of the arc-shaped pad weaving process according to one or more embodiments of the present invention;

[0030] Figure 6 This is a schematic diagram of the warp yarn being woven around a support mold according to one or more embodiments of the present invention;

[0031] Figure 7 This is a schematic diagram of the weft weaving process according to one or more embodiments of the present invention;

[0032] Figure 8 This is a schematic diagram of the first layer of warp and weft yarn weaving according to one or more embodiments of the present invention;

[0033] Figure 9 This is a schematic diagram of the second layer of warp and weft weaving according to one or more embodiments of the present invention;

[0034] Figure 10 This is a schematic diagram of multi-layer warp and weft weaving according to one or more embodiments of the present invention;

[0035] Figure 11 This is a schematic diagram of a pad roll according to one or more embodiments of the present invention.

[0036] Among them, 1. Inner ring of bearing, 2. Outer ring of bearing, 3. Bearing liner, 4. Annular braided plate, 5. Support mold, 6. Warp, 7. Weft, 8. Liner roll;

[0037] 41. First tooth flank, 42. Second tooth flank, 43. First meridian, 44. Second meridian, 45. First layer of meridians, 46. Second layer of meridians, 47. Latitude gap, 48. Third layer of meridians, 49. Fourth layer of meridians, 7.1. Latitude, 7.2. Latitude, 7.3. Latitude. Detailed Implementation

[0038] Example 1:

[0039] In a typical embodiment of the present invention, such as Figures 3-9 As shown, a method for weaving curved surface pads is presented.

[0040] Because uneven surfaces and wrinkles at the edges can occur when pasting planar bearing gaskets, resulting in poor adhesion to the spherical surface of spherical bearings; and existing curved gaskets are manufactured by extrusion molding, which can easily damage the internal continuity of the gasket material and affect the gasket's performance; therefore, this embodiment provides a method for weaving curved gaskets, which uses a ring-shaped weaving plate in conjunction with a support mold to manufacture curved gaskets, thus avoiding damage to the curved surface structure of the gasket during the manufacturing process.

[0041] The following is a detailed description of the above-mentioned arc-shaped pad weaving method with reference to the accompanying drawings.

[0042] The arc-shaped liner in this embodiment is woven from two types of fiber blended fabric, namely polytetrafluoroethylene (PTFE) fiber and aramid (Kevlar) fiber blended yarn, which has good tribological properties under dry friction conditions and is woven with the assistance of a ring braiding plate.

[0043] Specifically, the method for weaving curved pads includes the following steps:

[0044] Step 1, as follows Figure 3 As shown, the inner ring 1 of the bearing of different sizes serves as the support mold 5 for the arc-shaped liner, ensuring that its outer surface is clean and flat, and the annular braided plate 4 is fixed at both ends of the support mold 5.

[0045] In this embodiment, the orientation is defined based on the vertical direction of the axis of the supporting mold 5, that is, the top and bottom of the supporting mold 5 are respectively fixed with annular woven plates 4.

[0046] like Figure 4As shown, the annular braided plate 4 is annular in shape, and its inner wall has evenly distributed teeth, forming gaps between adjacent teeth for yarn to pass through; wherein, one side of the tooth is the first tooth side 41, and the other side is the second tooth side 42; and the gap between adjacent teeth, that is, the distance between the first tooth side 41 and the second tooth side 42 of two adjacent teeth, is less than the tooth width.

[0047] The tooth pitch of the annular braided board 4 typically ranges from 8 teeth per 25.4 mm to 20 teeth per 25 mm. Finer yarns generally require smaller tooth pitches, while coarser yarns require larger tooth pitches. In this embodiment, the yarn diameter is 0.15 mm, and a tooth pitch of 15 teeth per 25.4 mm is selected.

[0048] The tooth depth of the annular braided plate 4 is usually between 1.2 mm and 5 mm. The tooth depth is selected according to the thickness of the bearing liner 3. In this embodiment, a tooth depth of 2 mm is selected, which can meet the braiding density and texture of the bearing liner 3.

[0049] Step 2: First, PTFE fiber and aramid fiber are evenly mixed and processed into yarn, and then the yarn is used as warp yarn 6 and weft yarn 7 for alternating weaving.

[0050] Based on warp 6, as shown in Figures 5(a) and 5(b), warp 6 is inserted from the first tooth side 41 of any tooth of the top annular braiding plate 4, and then exited from the second tooth side 42 of the same tooth. Then, warp 6 is passed out from both sides of the corresponding tooth of the bottom annular braiding plate 4 of the support mold 5, and then from the tooth side of the adjacent tooth of the top annular braiding plate 4. The above operation is repeated to weave warp 6 around the support mold 5 once by relying on the annular braiding plate 4.

[0051] It should be noted that, as Figure 7 As shown, in this embodiment, the warp threads 6 are divided into the first warp thread 43, the second warp thread 44, ... and the first layer of warp threads 6 are divided into the second layer of warp threads 45, the third layer of warp threads 46, the fourth layer of warp threads 48, ... and the fourth layer of warp threads 49, ... according to the number of weaving layers of warp threads 6.

[0052] After warp 6 has been woven once, weft 7.1 is passed under the first warp 43 and then over the second warp 44 to continue weaving, until weft 7.1 is woven once around the support mold 5 with warp 6 as the reference. Figure 8 As shown; continue weaving the second layer of warp threads 46, as... Figure 9 As shown, the second layer of weft yarn passes under the first layer of warp yarn 45 and then passes over the second layer of warp yarn 46 to complete the weaving of the first round (first layer) of the bearing liner. Typically, a round of woven bearing liner can include a single layer or multiple layers of woven structure. Liners with more layers can increase load-bearing capacity, but also increase manufacturing complexity and cost.

[0053] In this embodiment, the bearing gasket 3 adopts a two-layer braided structure. The specific method for further increasing the number of braided structure layers is as follows: Figure 10 As shown; the third layer of warp yarn 48 is passed through the weft yarn gap 47. After supporting the mold 5 for one turn, the fourth layer of warp yarn 49 is woven in a staggered manner with the third layer of warp yarn 48. After the warp yarn 6 is woven for one turn, the weft yarn 7.3 is passed through the lower part of the fourth layer of warp yarn 49 and woven in. The weft yarn 7.2 is woven above the fourth layer of warp yarn 49, and the new layer is completed. More structural layers are completed by adding warp yarn layers.

[0054] In this embodiment, the thickness of the spherical plain bearing shim is generally between 0.1mm and 1mm. The thickness of the first bearing shim is set to 0.3mm. This thickness can effectively lubricate the bearing and prevent foreign objects from passing through the bearing shim 3 and causing damage to the inner wall of the spherical plain bearing.

[0055] Step 3: Continue weaving using the same method as the first layer of padding, repeating the weaving process multiple times. The specific number of layers depends on the actual situation.

[0056] Step 4: After weaving is complete, remove the bearing liner 3 from the support mold 5 to form the shape shown. Figure 10 When needed, the bearing liner 3 of the required length is cut directly from the liner roll 8. Epoxy resin is applied to the inner surface of the bearing outer ring 2, and then the cut bearing liner 3 is attached to the inner surface of the bearing outer ring 2 to bond the two together.

[0057] In this embodiment, a ring-shaped braided board 4 is used to weave an arc-shaped gasket, which can adhere to a large curved surface and has excellent conformability. It provides a good fit to the inner wall of the bearing's arc surface. This weaving method not only avoids the pulling damage to the arc surface of the gasket caused by extrusion molding, but also allows the gasket roll 8 formed after weaving to be cut to the required length, making it convenient, quick, and waste-free.

[0058] This embodiment is prepared by blending two types of fiber yarns, which has high friction and lubrication properties and can meet the wear resistance requirements of bearings during operation; the overall weaving method is simple and the manufacturing process is green, environmentally friendly and pollution-free.

[0059] Example 2:

[0060] This embodiment provides a spherical bearing, such as Figures 1-3 As shown, the bearing includes an inner ring 1, an outer ring 2, and a bearing gasket 3 disposed between the two. The bearing gasket 3 is an arc-shaped gasket made by the weaving method described in Example 1. The arc-shaped gasket is attached to the inner surface of the outer ring 2 with epoxy resin adhesive.

[0061] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for weaving an arc-shaped pad, characterized in that, A support mold that uses the inner ring of a bearing as an arc-shaped liner, wherein both ends of the support mold are provided with annular braided plates, and the inner side of the annular braided plates has evenly distributed teeth, one side of which is a first tooth side and the other side is a second tooth side. The weaving method includes: The warp yarn is inserted into the first tooth side of any tooth of the first end ring braiding plate and then out from the second tooth side. Then the warp yarn is inserted into the corresponding teeth of the second end ring braiding plate from both sides, and then out from the adjacent teeth of the first end ring braiding plate from both sides, until it is braided around the ring braiding plate once. The weft yarn is woven around the support mold with the warp yarn as the reference: the weft yarn passes under the warp yarn and then passes over the warp yarn to weave, completing the first layer of the padding; The arc-shaped pad is a single-layer or multi-layer woven structure; when the arc-shaped pad is a two-layer woven structure, the weft yarn is woven around the support mold with the warp yarn as the reference, and then the second layer of warp yarn is woven; the second layer of weft yarn passes under the first layer of warp yarn and then passes over the second layer of warp yarn for weaving. The warp and weft yarns are made of a blend of polytetrafluoroethylene and aramid fibers.

2. The method for weaving an arc-shaped pad according to claim 1, characterized in that, Repeat the weaving pattern of the first layer of padding until the set number of layers is completed.

3. The method for weaving an arc-shaped pad according to claim 2, characterized in that, A multi-layered weave structure is created by adding layers of warp threads.

4. The method for weaving an arc-shaped pad according to claim 1, characterized in that, The thickness of the curved pad is 0.1mm-1mm.

5. The method for weaving an arc-shaped pad according to claim 1, characterized in that, The tooth pitch of the annular braided plate ranges from 8 teeth per 25.4 mm to 20 teeth per 25 mm, and the tooth depth of the annular braided plate ranges from 1.2 mm to 5 mm.

6. A spherical plain bearing, characterized in that, It includes an inner bearing ring, an outer bearing ring, and a bearing gasket disposed between the two, wherein the bearing gasket is an arc-shaped gasket made by the weaving method described in any one of claims 1-5.

7. A spherical plain bearing according to claim 6, characterized in that, The arc-shaped gasket is adhered to the inner surface of the bearing outer ring using epoxy resin adhesive.

Images