Blind hole copper-based embedded self-lubricating bearing

Abstract

The utility model relates to the technical field of bearings, in particular to a blind hole copper-based inlaid self-lubricating bearing which comprises a bearing base sleeve, a plurality of blind holes are formed in the bearing base sleeve, the axis of each blind hole intersects with the axis of the bearing base sleeve, each blind hole is of a round hole structure, and solid lubricant is arranged in each blind hole. The outer wall face of the solid lubricant and the inner wall face of the blind hole are arranged in an interference and embedded mode, the solid lubricant is provided with an exhaust groove of a strip-shaped structure, the exhaust groove is parallel to the axis of the blind hole, and an arc-shaped protrusion is welded to the position of an inner opening of the bearing base sleeve and embedded in the outer wall face of the solid lubricant. The solid lubricant is saved through blind hole inlaying, the influence on the overall mechanical performance of the base body is reduced, the whole copper alloy base body is not drilled through, the metal structure is relatively continuous, the bearing capacity of the whole bearing is reduced less, and it is guaranteed that the overall bearing has the high mechanical performance.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a blind hole copper-based inlaid self-lubricating bearing. Background Art

[0002] Blind hole copper-based inlaid self-lubricating bearing is a specially designed bearing that has the ability to embed solid lubricants in specific locations.

[0003] Such bearings are typically used in heavy-load and slow-speed applications, such as in mining, construction, agriculture, and some industrial equipment.

[0004] The characteristics of this type of bearings:

[0005] Self-lubricating: Due to the presence of solid lubricants, additional lubrication systems can be omitted in some applications, reducing maintenance costs and the risk of failure;

[0006] High load-bearing capacity: Blind hole copper-based inlaid self-lubricating bearings are usually made of bronze or other high-strength materials and can withstand large loads;

[0007] Wear-resistant: Due to the embedded solid lubricant, this bearing still has a low wear rate under dry friction conditions;

[0008] No need for oil grooves and oil holes: Compared with traditional lubricated bearings, this type of bearing does not require oil grooves and oil holes on the shaft because it comes with its own lubricant.

[0009] Blind hole copper-based inlaid self-lubricating bearing is a high-performance bearing suitable for special working conditions. Correct selection and use can significantly improve the reliability and efficiency of the equipment.

[0010] Many of the copper-based solid lubricant bearings on the market now have solid lubricants embedded in through holes. Solid lubricants are usually made of graphite columns and bonded to the holes with organic glue. Solid lubricants bonded with organic glue may fail after blisters or high temperatures. The substances contained in the organic glue may pollute the environment. The original bearing matrix is ​​drilled through with through holes, reducing the load-bearing capacity of the entire bearing. Utility Model Content

[0011] The utility model aims to solve the above-mentioned shortcomings in the prior art and proposes a blind hole copper-based inlaid self-lubricating bearing.

[0012] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0013] A blind hole copper-based inlaid self-lubricating bearing is designed, and a bearing base sleeve is provided with a plurality of blind holes inside the bearing base sleeve, and the axis of the blind hole is arranged to intersect with the axis of the bearing base sleeve, and the blind hole is a circular hole structure, the blind hole is provided with a solid lubricant, and the outer wall surface of the solid lubricant and the inner wall surface of the blind hole are interference-embedded with each other, a strip-shaped exhaust groove is provided on the solid lubricant, and the exhaust groove is arranged parallel to the axis of the blind hole, and an arc-shaped protrusion is welded at the internal opening position of the bearing base sleeve, and the arc-shaped protrusion is embedded in the outer wall surface of the solid lubricant.

[0014] In detail, the bearing base sleeve and the arc-shaped protrusion are made of copper alloy material, and the copper alloy type is ZCuAl9Fe4Ni4Mn2.

[0015] In detail, the solid lubricant includes tin, aluminum, copper, iron, ink, molybdenum disulfide, carbon tetrafluoride, or any one thereof.

[0016] In detail, an interference margin of 0.02 to 0.1 mm is reserved between the solid lubricant and the eyelet of the blind hole.

[0017] In detail, the blind holes are arranged on the inner wall of the bearing base sleeve with equal arc lengths along the horizontal position and are evenly spaced along the vertical position.

[0018] The design scheme proposed by the utility model has the following beneficial effects during application:

[0019] 1. Blind hole inlay saves solid lubricants and reduces the impact on the overall mechanical properties of the matrix. The entire copper alloy matrix is ​​not drilled through, and the metal structure is relatively continuous, which reduces the bearing capacity of the entire bearing less and ensures that the bearing as a whole has higher mechanical properties.

[0020] 2. The entire inlaid column of the cast copper alloy inlaid solid lubricant self-lubricating bearing is interference knocked into the hole during the processing. No organic glue is used for bonding, which is pollution-free to the environment and is an environmentally friendly product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is an enlarged schematic diagram of point a of the utility model;

[0023] Figure 3 This is a schematic diagram of the distribution of the exhaust grooves on the solid lubricant of the utility model;

[0024] Figure 4 It is a schematic diagram of the interior of the blind hole of the utility model.

[0025] In the figure: 10, bearing base sleeve; 11, blind hole; 12, solid lubricant; 13, exhaust groove; 14, arc-shaped protrusion. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] Reference Figure 1-Figure 4 A blind hole copper-based inlaid self-lubricating bearing, a bearing base sleeve 10, a plurality of blind holes 11 are opened inside the bearing base sleeve 10, and the axis of the blind hole 11 is arranged to intersect with the axis of the bearing base sleeve 10, and the blind hole 11 is a circular hole structure, the blind hole 11 is provided with a solid lubricant 12, and the outer wall surface of the solid lubricant 12 and the inner wall surface of the blind hole 11 are interference-embedded with each other, the solid lubricant 12 contains tin, aluminum, copper, iron, ink, molybdenum disulfide, carbon tetrafluoride, any one of which is selected, a strip-shaped exhaust groove 13 is opened on the solid lubricant 12, and the exhaust groove 13 is arranged parallel to the axis of the blind hole 11, an arc-shaped protrusion 14 is welded at the internal opening position of the bearing base sleeve 10, and the arc-shaped protrusion 14 is embedded in the outer wall surface of the solid lubricant 12.

[0028] It should be further explained that the bearing base sleeve 10 and the arc-shaped protrusion 14 are made of copper alloy material, and the copper alloy type is ZCuAl9Fe4Ni4Mn2. By adding the arc-shaped protrusion 14 structure, the local tightening effect can be further improved when the solid lubricant 12 and the blind hole 11 are in interference fit, thereby improving the installation stability of the solid lubricant 12 and the blind hole 11.

[0029] It should be further explained that an interference margin of 0.02 to 0.1 mm is reserved between the solid lubricant 12 and the eyelet of the blind hole 11. The blind hole 11 is inlaid with the solid lubricant 12, so that the entire bearing has self-lubricating properties. The blind hole inlay saves solid lubricant, reduces the impact on the overall mechanical properties of the matrix, and basically does not reduce the load-bearing capacity of the entire bearing.

[0030] It should be further explained that the blind holes 11 are arranged on the inner wall of the bearing base sleeve 10 with equal arc lengths in the horizontal position and are evenly spaced in the vertical position.

[0031] Working method: ZCuAl9Fe4Ni4Mn2 copper alloy is selected for rough machining, and machining allowances are left on the length, outer diameter and inner diameter. Drilling is performed using a four-axis CNC machining center according to the requirements of the drawing. The drilling is required to be performed on the inner surface of the bearing. The CNC machining center power head and CNC indexing device are used to drill blind holes on the inner surface of the sleeve according to a certain pattern. The axis of the blind hole is required to intersect with the axis of the bearing. The arrangement of the holes requires no dead zone in the circumferential and axial directions of the sleeve to ensure that a complete solid lubrication film can be formed in various movement directions.

[0032] The solid lubricant should have an interference fit of 0.02 to 0.10 mm with the hole, and a rubber hammer should be used to knock the prepared solid lubricant into the hole. Since it is a blind hole inlay, an exhaust groove should be made. After the inlay is completed once, an effective exhaust treatment for 24 hours is required. After the exhaust treatment, the solid lubricant should be knocked again to make it more firmly and reliably embedded in the hole.

[0033] Next, mechanical processing is carried out according to the requirements of the drawings to meet the size and tolerance requirements of the drawings. If necessary, a layer of pre-lubrication film can be sprayed on the working surface of the bearing to improve the friction and wear characteristics during the running-in stage. Through the above steps, a blind hole copper-based inlaid self-lubricating bearing can be produced.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A blind hole copper-based inlaid self-lubricating bearing, a bearing base sleeve (10), characterized in that: The bearing base sleeve (10) is provided with a plurality of blind holes (11) inside, and the axis of the blind hole (11) is arranged to intersect with the axis of the bearing base sleeve (10), and the blind hole (11) is a circular hole structure. The blind hole (11) is provided with a solid lubricant (12), and the outer wall surface of the solid lubricant (12) and the inner wall surface of the blind hole (11) are mutually interference-embedded, and the solid lubricant (12) is provided with a strip-shaped exhaust groove (13), and the exhaust groove (13) is arranged parallel to the axis of the blind hole (11). An arc-shaped protrusion (14) is welded at the internal opening position of the bearing base sleeve (10), and the arc-shaped protrusion (14) is embedded in the outer wall surface of the solid lubricant (12).

2. A blind hole copper-based inlaid self-lubricating bearing according to claim 1, characterized in that: The bearing base sleeve (10) and the arc-shaped protrusion (14) are made of a copper alloy material, and the copper alloy type is ZCuAl9Fe4Ni4Mn2.

3. The blind hole copper-based inlaid self-lubricating bearing according to claim 1, characterized in that: The solid lubricant (12) comprises any one of tin, aluminum, copper, iron, ink, molybdenum disulfide and carbon tetrafluoride.

4. The blind hole copper-based inlaid self-lubricating bearing according to claim 1, characterized in that: An interference margin of 0.02 to 0.1 mm is reserved between the solid lubricant (12) and the hole of the blind hole (11).

5. The blind hole copper-based inlaid self-lubricating bearing according to claim 1, characterized in that: The blind holes (11) are arranged on the inner wall of the bearing base sleeve (10) with equal arc lengths along the horizontal position, and are arranged with equal distances along the vertical position.

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