A running-in device for pairs of micro-coated bearings

Abstract

The utility model relates to the technical field of bearing running, specifically relates to a kind of running device of paired miniature coated bearing, it includes: base, outer sleeve, outer ring pre-tightening component, inner ring pre-tightening component and drive assembly;The middle part of base is provided with the inner sleeve of vertical arrangement;Outer sleeve is sleeved in the inner ring of inner sleeve, and the clearance of installing bearing is formed between the inner ring of outer sleeve and the outer ring of inner sleeve;Outer ring pre-tightening component is used to pre-tighten the outer ring of bearing;Inner ring pre-tightening component is threaded in the inside of inner sleeve, and inner ring pre-tightening component is used to pre-tighten the inner ring of bearing;Drive assembly is used to drive outer sleeve rotation to carry out bearing running.This device drives whole set of multiple sets of bearings to run under certain load, not only high running efficiency, but also ensure the consistency of whole set of multiple sets of bearings film forming, ensure the stability of bearing application.

Description

Technical Field

[0001] This utility model relates to the field of bearing running-in technology, specifically to a running-in device for paired miniature coated bearings. Background Technology

[0002] Spacecraft, especially satellites, space probes, and manned spacecraft, require mechanisms (such as solar panel drive mechanisms, antenna pointing mechanisms, momentum wheels, and control moment gyroscopes) to operate stably and reliably for extended periods under extreme conditions. Oil- or grease-lubricated aerospace bearings used in transmission systems often lose their original performance due to extreme temperature variations, ultra-vacuum conditions, and difficulties in long-term refueling. This makes molybdenum disulfide solid-lubricated bearings an irreplaceable solution in many critical satellite mechanisms.

[0003] Previously, the running-in of miniature coated bearings was mainly done manually, with only two sets of bearings allowed to be run-in at a time, which was inefficient and required a lot of labor for the operators.

[0004] Therefore, there is a need to provide a running-in device for paired miniature coated bearings to solve the above problems. Utility Model Content

[0005] This invention provides a running-in device for paired miniature coated bearings to solve existing problems.

[0006] The running-in device for paired miniature coated bearings of this utility model adopts the following technical solution, including: The base has a vertically arranged inner sleeve in its middle section; The outer sleeve is fitted onto the inner ring of the inner sleeve, and a clearance for mounting the bearing is formed between the inner ring of the outer sleeve and the outer ring of the inner sleeve. Outer ring preload assembly, which is used to preload the outer ring of the bearing; The inner ring preload assembly is installed inside the inner sleeve and is used to preload the inner ring of the bearing. And a drive assembly for driving the outer sleeve to rotate for bearing running-in; Multiple bearings are installed along the axial direction of the inner sleeve in the bearing mounting gap, and an inner washer or an outer washer is provided between every two adjacent bearings. The inner and outer washers are spaced apart. The inner washer is used to support the inner ring of two adjacent bearings, and the outer washer is used to support the outer ring of two adjacent bearings.

[0007] A further technical solution of this utility model includes an outer ring pre-tightening component comprising: The pressure ring is detachably connected to the end of the outer sleeve away from the base; And a support ring, which is detachably connected to the end of the outer sleeve facing the base; Both the pressure ring and the support ring are in contact with the outer ring end face of the bearing.

[0008] In a further technical solution of this utility model, both the pressure ring and the support ring are connected by screws and screw holes provided on the end face of the outer sleeve.

[0009] A further technical solution of this utility model is that the inner ring preload assembly includes: a bolt, which enters the inner sleeve from the side of the base away from the inner sleeve, and its end extends out of the inner sleeve and is threadedly connected to a load, and the end face of the load contacts the inner ring of the bearing.

[0010] A further technical solution of this utility model is that the side of the load facing the base has a stepped structure, wherein the small shaft of the stepped structure is sleeved on the inner ring of the bearing, and the end face of the small shaft is in contact with the end face of the inner sleeve. The stepped surface of the stepped structure serves as a preload surface and is in contact with the end face of the inner ring of the bearing.

[0011] A further technical solution of this utility model includes a drive component comprising: a variable frequency motor, wherein the output end of the variable frequency motor and the outer sleeve are connected by a belt drive component.

[0012] A further technical solution of this utility model includes a belt drive connection assembly comprising: a driving pulley connected to the output end of a variable frequency motor and a driven pulley provided on the outer ring of an outer sleeve, wherein the driving pulley and the driven pulley are connected by a belt drive.

[0013] In a further technical solution of this utility model, the base is fixed to the workbench surface by screws.

[0014] The beneficial effects of this utility model are: This invention enables multiple sets of bearings to run-in under a certain load, resulting in high running-in efficiency and ensuring consistent film formation across the entire bearing assembly, thus guaranteeing the stability of bearing application. Furthermore, the running-in device of this invention has a simple structure, making it easy to ensure its machining accuracy. The running-in device uses a variable frequency motor drive and belt transmission instead of manual running-in. The volume and weight of the load block can be adjusted as needed to achieve bearing running-in under different preloads. The bearings exhibit good film consistency after running-in. It has a wide range of applications, suitable for running-in most miniature coated bearings. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1This is a schematic diagram of the running-in device for paired miniature coated bearings according to the present invention. Figure 2 This is a schematic diagram showing the force on a pair of miniature coated bearings after multiple bearings are installed in the running-in device of this utility model. Figure 3 for Figure 1 Schematic diagram of the structure of the inner and outer washers; Figure 4 for Figure 1 Schematic diagram of the structure of the inner and outer jacket; Figure 5 This is a view of the trench coating before break-in. Figure 6 This is a diagram showing the appearance of the trench coating after running-in using this device.

[0017] In the diagram: 1. Base; 2. Load; 3. Inner washer; 4. Outer washer; 5. Outer sleeve; 6. Pressure ring; 7. Belt; 8. Variable frequency motor; 9. Bolt; 10. Inner sleeve. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] An embodiment of the running-in device for paired miniature coated bearings of this utility model, such as... Figure 1 As shown, it includes: a base 1, an outer sleeve 5, an outer ring preload assembly, an inner ring preload assembly, and a drive assembly; a vertically arranged inner sleeve 10 is provided in the middle of the base 1; the outer sleeve 5 is sleeved on the inner ring of the inner sleeve 10, and a clearance for installing the bearing is formed between the inner ring of the outer sleeve 5 and the outer ring of the inner sleeve 10; the outer ring preload assembly is used to preload the outer ring of the bearing; the inner ring preload assembly is inserted inside the inner sleeve 10 and is used to preload the inner ring of the bearing; the drive assembly is used to drive the outer sleeve 5 to rotate for bearing running-in.

[0020] It should be noted that, in one specific embodiment, the inner sleeve 10 is a long cylindrical body. Multiple bearings can be installed along the axial direction of the inner sleeve 10 through the gaps in the bearing installation. An inner washer 3 or an outer washer 4 is provided between every two adjacent bearings, with the inner washer 3 and outer washer 4 spaced apart. The inner washer 3 supports the inner rings of two adjacent bearings, and the outer washer 4 supports the outer rings of two adjacent bearings. This determines the force direction when multiple bearings are installed in the inner sleeve 10 and supported by the washers. It should be noted that this arrangement is because the bearings are DB assembly, i.e., deep groove ball bearings used for angular contact, which allows the lubricating film in the bearing's stress area to run-in. Specifically, in this embodiment, using... Figure 1 For reference, the bearing closest to the base 1 is supported by an outer washer 4 between itself and its adjacent bearing.

[0021] For example, in one specific embodiment, the outer ring preload assembly includes a pressure ring 6 and a support ring. The pressure ring 6 is detachably connected to the end of the outer sleeve 5 facing away from the base 1; the support ring is detachably connected to the end of the outer sleeve 5 facing the base 1; wherein both the pressure ring 6 and the support ring are in contact with the outer ring end face of the bearing. In this embodiment, both the pressure ring 6 and the support ring are connected by screws and screw holes provided on the end face of the outer sleeve 5.

[0022] For example, in one specific embodiment, the inner ring preload assembly includes: a bolt 9, which enters the inner sleeve 10 from the side of the base 1 away from the inner sleeve 10, and its end extends out of the inner sleeve 10 and is threadedly connected to a load 2, and the end face of the load 2 contacts the inner ring of the bearing.

[0023] For example, in one specific embodiment, the side of the load 2 facing the base 1 has a stepped structure, wherein the small shaft of the stepped structure is sleeved on the inner ring of the bearing, and the end face of the small shaft is in contact with the end face of the inner sleeve 10, and the stepped surface of the stepped structure is in contact with the end face of the inner ring of the bearing as a preload surface.

[0024] For example, in one specific embodiment, the drive component includes a variable frequency motor 8, the output end of which is connected to the outer sleeve 5 via a belt drive assembly.

[0025] For example, in one specific embodiment, the belt drive connection assembly includes: a driving pulley connected to the output end of the variable frequency motor 8 and a driven pulley provided on the outer ring of the outer sleeve 5, and the driving pulley and the driven pulley are connected by a belt 7.

[0026] For example, in one specific embodiment, the base 1 is fixed to the workbench surface by screws.

[0027] Working principle Taking bearing 61701 as an example, the running-in process of this utility model uses a variable frequency motor 8 driven by a belt drive to conduct a running-in test on a set of 10 bearings. The bearing has external dimensions of φ12mm×φ16mm×4mm. (1) Fix base 1 to the platform, and arrange 10 sets of 61701 bearings according to Figure 1 and Figure 2 The bearing is preloaded by inner washer 3 and outer washer 4, and outer ring 5 and pressure ring 6 are used to preload the outer ring of the bearing. Load 2 and bolt 9 are used to preload the inner ring of the bearing. (2) Use belt 7 to drive and tension the variable frequency motor 8 and the outer sleeve 5; (3) Start the variable frequency motor 8 and run it at a speed of 200 r / min for 5 minutes each in forward and reverse rotation. (4) The appearance of the trench coating before running-in is as follows Figure 5 As shown; the appearance of the trench coating after running-in is as follows Figure 6 As shown, from Figure 5 and Figure 6 The comparison shows that the coating film formation in the trench is consistent after the break-in period.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A running-in device for paired miniature coated bearings, characterized in that, include: The base has a vertically arranged inner sleeve in its middle section; The outer sleeve is fitted onto the inner ring of the inner sleeve, and a clearance for mounting the bearing is formed between the inner ring of the outer sleeve and the outer ring of the inner sleeve. Outer ring preload assembly, which is used to preload the outer ring of the bearing; The inner ring preload assembly is installed inside the inner sleeve and is used to preload the inner ring of the bearing. And a drive assembly for driving the outer sleeve to rotate for bearing running-in; Multiple bearings are installed along the axial direction of the inner sleeve in the bearing mounting gap, and an inner washer or an outer washer is provided between every two adjacent bearings. The inner and outer washers are spaced apart. The inner washer is used to support the inner ring of two adjacent bearings, and the outer washer is used to support the outer ring of two adjacent bearings.

2. The running-in device for paired miniature coated bearings according to claim 1, characterized in that, The outer ring preload assembly includes: The pressure ring is detachably connected to the end of the outer sleeve away from the base; And a support ring, which is detachably connected to the end of the outer sleeve facing the base; Both the pressure ring and the support ring are in contact with the outer ring end face of the bearing.

3. The running-in device for paired miniature coated bearings according to claim 1, characterized in that, Both the pressure ring and the support ring are connected by screws and screw holes provided on the end face of the outer sleeve.

4. The running-in device for paired miniature coated bearings according to claim 1, characterized in that, The inner ring preload assembly includes a bolt that enters the inner sleeve from the side of the base away from the inner sleeve, and its end protrudes from the inner sleeve and is threaded to a load, with the end face of the load contacting the inner ring of the bearing.

5. The running-in device for paired miniature coated bearings according to claim 4, characterized in that, The side of the load facing the base has a stepped structure. The small shaft of the stepped structure is sleeved on the inner ring of the bearing, and the end face of the small shaft contacts the end face of the inner sleeve. The stepped surface of the stepped structure serves as a preload surface and contacts the end face of the inner ring of the bearing.

6. The running-in device for paired miniature coated bearings according to claim 1, characterized in that, The drive assembly includes a variable frequency motor, and the output end of the variable frequency motor and the outer sleeve are connected by a belt drive assembly.

7. The running-in device for paired miniature coated bearings according to claim 6, characterized in that, The belt drive connection assembly includes: a driving pulley connected to the output end of the variable frequency motor and a driven pulley on the outer ring of the outer sleeve, with the driving pulley and the driven pulley connected by a belt drive.

8. The running-in device for paired miniature coated bearings according to claim 1, characterized in that, The base is fixed to the workbench with screws.

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