Method for detecting outer guide gap of deep groove ball bearing retainer

Abstract

A deep groove ball bearing retainer outer guide clearance detection method belongs to the technical field of bearing detection, and comprises the following steps: fixing a retainer on a bearing radial clearance measuring instrument; the measuring meter of the bearing radial clearance measuring instrument is in point contact with the outer surface of the bearing outer ring, a radial load is applied to the outside of the bearing, the bearing outer ring vertically moves up and down, and at the moment, the value of the measuring meter is read as the measured value of the outer guide clearance of the bearing retainer. The detection method is low in cost, simple in structure, easy and convenient to operate and suitable for being popularized to the detection process of the outer guide gap of the similar deep groove ball bearing retainer.

Description

Technical Field

[0001] The invention relates to a detection method, in particular to a detection method for an outer guide clearance of a deep groove ball bearing cage, and belongs to the technical field of bearing detection. Background Art

[0002] The common method for detecting the outer guide clearance of the cage of deep groove ball bearings is generally to use a feeler gauge for qualitative inspection. For example, when the cage guide clearance is specified to be 0.4-0.45mm, 0.4mm and 0.45mm thick feeler gauges are used for testing respectively. When the 0.4mm thick feeler gauge passes and the 0.45mm thick feeler gauge fails, the cage guide clearance is considered qualified. This method cannot detect the exact value of the guide clearance, and there is a large error in the detection of the arc-shaped guide clearance structure by the flat feeler gauge. Summary of the invention

[0003] The present invention provides a method for detecting the outer guide clearance of a deep groove ball bearing cage to overcome the shortcomings of the prior art. The method is based on the detection principle and can realize accurate detection of the outer guide clearance of the deep groove ball bearing cage, and the detection is convenient and efficient.

[0004] A method for detecting outer guide clearance of a deep groove ball bearing cage, characterized in that the detection method comprises:

[0005] S1. Fix the cage to the bearing radial clearance measuring instrument;

[0006] S2. Place the measuring point of the bearing radial clearance measuring instrument in contact with the outer surface of the bearing outer ring, apply a radial load to the outside of the bearing, and move the bearing outer ring vertically up and down. The value read from the measuring table at this time is the actual measured value of the bearing cage outer guide clearance.

[0007] Furthermore, in step S1, the retaining frame is fixed on the bearing radial clearance measuring instrument by using a tool, and the tool includes a pressure block and a pressure plate. The mandrel with a flange is installed on the bearing radial clearance measuring instrument, and one of the pressure blocks passes through the mandrel and abuts against the flange. The deep groove ball bearing to be measured is sleeved on the mandrel, and another pressure block is passed through the mandrel. An axial force is applied to the other pressure block by using a pressure plate installed on the mandrel to clamp the retaining frame.

[0008] Furthermore, a U-shaped groove is radially opened on the upper edge of the pressing plate, and the bottom of the U-shaped groove is connected to the center of the pressing plate.

[0009] Furthermore, in step S2, a cylinder provided in the bearing radial clearance measuring instrument is used to apply a radial load to the outer ring of the bearing.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. It can further optimize the qualitative detection method into a quantitative detection method to achieve accurate measurement of the outer guide clearance of the cage;

[0012] 2. Solve the problem of surface scratches on parts caused by sliding friction between the feeler gauge and the outer diameter of the cage and the inner diameter of the bearing outer ring;

[0013] 3. During the measurement process, a torque wrench is used to apply a uniform standard clamping force and measurement load to the cage, and the automatic measurement of the instrument eliminates the problem of different measurement results caused by different strengths of different people when measuring with a feeler gauge;

[0014] 4. The quantitative detection method unifies the judgment criteria of the test results and solves the problem of measurement result distortion caused by human factors when measuring with manual feeler gauges;

[0015] 5. Detection efficiency has been improved by more than 50%.

[0016] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a tooling and a measuring instrument combined with a method for detecting the outer guide clearance of a deep groove ball bearing cage of the present application;

[0018] Figure 2 is a schematic diagram of a pressing plate in an embodiment;

[0019] Figure 3 is a schematic diagram of another pressing plate in the embodiment;

[0020] Figure 4 is a schematic diagram of a briquette in an embodiment;

[0021] Figure 5 Schematic diagram of the mandrel in the embodiment.

[0022] The reference numerals are as follows:

[0023] 1. Bearing outer ring, 3. Bearing radial clearance measuring instrument, 4. Tooling, 41. Pressure block, 42. Pressure plate, 5. Mandrel, 51. Flange. DETAILED DESCRIPTION

[0024] The embodiments of the technical solution of the present application will be described in detail below in conjunction with the accompanying drawings. Unless otherwise specified, the technical terms or scientific terms used in the present application are generally understood by those skilled in the art to which the present invention belongs.

[0025] Reference Figure 1 , a method for detecting the outer guide clearance of a deep groove ball bearing cage in this embodiment, wherein the guide clearance refers to the difference between the inner diameter of the bearing outer ring 1 and the outer diameter of the cage, and the detection method comprises:

[0026] S1. Fix the cage to the bearing radial clearance measuring instrument 3;

[0027] S2. Place the measuring point of the bearing radial clearance measuring instrument 3 in contact with the outer surface of the bearing outer ring 1, apply a radial load to the bearing outer ring 1, and move the bearing outer ring 1 vertically up and down. The value read from the measuring table at this time is the actual measured value of the outer guide clearance of the bearing cage.

[0028] Through this process method, the quantitative and accurate detection of the outer guide clearance of the deep groove ball bearing cage is achieved, and the detection repeatability accuracy can reach within 0.01mm. This detection method has low cost, simple structure, and easy operation, and is suitable for promotion to similar detection processes of the outer guide clearance of the deep groove ball bearing cage.

[0029] At present, this method has been applied to the detection of the outer guide clearance of deep groove ball bearing cages. The detection application of about 200 bearings has proved that this method can accurately and quickly quantify the measured value of the outer guide clearance of deep groove ball bearing cages, and the detection method is stable and reliable.

[0030] In the above implementation scheme, in step S1, the retaining frame is fixed on the bearing radial clearance measuring instrument 3 by using the tooling 4, and the tooling 4 includes a pressure block 41 and a pressure plate 42. The mandrel 5 with a flange 51 is installed on the bearing radial clearance measuring instrument 3, wherein one of the pressure blocks 41 passes through the mandrel 5 and abuts against the flange 51, and the deep groove ball bearing to be measured is sleeved on the mandrel 5, and the other pressure block 41 is passed through the mandrel 5, and an axial force is applied to the other pressure block 41 by using the pressure plate 42 installed on the mandrel 5 to clamp the retaining frame.

[0031] The pressing plate 42 is pressed against a nut which is threadedly connected to the end of the core shaft 5 .

[0032] A U-shaped groove is radially formed on the pressing plate 42 , and the bottom of the U-shaped groove is connected to the center of the pressing plate 42 .

[0033] The anti-backlash hook of the bearing radial clearance measuring instrument 3 contacts the inner circumferential surface of the pressure block 41 adjacent to the flange 51 .

[0034] In step S2, a cylinder provided in the bearing radial clearance measuring instrument 3 is used to apply a radial load to the bearing outer ring 1.

[0035] A countersunk hole is opened in the radial direction on the end surface of the flange 51 , and the anti-backlash hook of the bearing radial clearance measuring instrument 3 passes through the countersunk hole and contacts the inner circumferential surface of the pressing block 41 adjacent to the flange 51 .

[0036] The bearing radial clearance measuring instrument 3 adopts an X095 type detector.

[0037] According to the principle of deep groove ball bearing cage outer guide clearance detection, after the cage is fixed, a load can be applied to the outer ring of the bearing to make it move vertically up and down. At this time, the maximum displacement of the outer ring is the actual measured value of the guide clearance. Because the outer ring 1 of the bearing is a regular annular structure, its center of mass is located at the center of the outer diameter and is equidistant from the end faces on both sides. To this end, a special tool 4 is designed to clamp the end faces of the cage on both sides, and the nut of the threaded structure is pressed against the pressure plate 42 to apply axial pressure to the cage, so that it is fixed on the X095 detection instrument, and the X095 detection instrument clearance elimination hook contacts the inner diameter of the pressure block, which can realize the synchronous movement of the instrument and the bearing cage, eliminate the slight deformation of the rigidity of the mandrel, and make the measurement value more accurate. Further, the measuring table point contacts the outer diameter of the bearing, and the cylinder in the bearing radial clearance measuring instrument 3 is adjusted to realize the loading point position of the lower loading block 31 and the upper loading block 32 to make the outer ring 1 of the bearing move vertically up and down. At this time, the instrument value read is the actual measured value of the outer guide clearance of the bearing cage.

[0038] The present invention has been disclosed as above with preferred implementation cases, but it is not intended to limit the present application. Any technician familiar with the profession can make slight changes or modifications to equivalent implementation cases with equivalent changes by using the above-disclosed structures and technical contents without departing from the scope of the technical solution of the present application, which still fall within the scope of the technical solution of the present application.

Claims

1. A method for detecting the outer guide clearance of a deep groove ball bearing cage, characterized in that: The detection method comprises: S1. Fix the cage to the bearing radial clearance measuring instrument (3); S2. Place the measuring point of the bearing radial clearance measuring instrument (3) in contact with the outer surface of the bearing outer ring (1), apply a radial load to the bearing outer ring (1), and move the bearing outer ring (1) vertically up and down. The value read from the measuring table at this time is the actual measured value of the bearing cage outer guide clearance.

2. A method for detecting outer guide clearance of a deep groove ball bearing cage according to claim 1, characterized in that: In step S1, a retaining frame is fixed on a bearing radial clearance measuring instrument (3) using a tool (4), wherein the tool (4) comprises a pressure block (41) and a pressure plate (42), and a mandrel (5) with a flange (51) is installed on the bearing radial clearance measuring instrument (3), wherein one of the pressure blocks (41) passes through the mandrel (5) and abuts against the flange (51), a deep groove ball bearing to be measured is sleeved on the mandrel (5), another pressure block (41) passes through the mandrel (5), and an axial force is applied to the other pressure block (41) using a pressure plate (42) installed on the mandrel (5) to clamp the retaining frame.

3. A method for detecting outer guide clearance of a deep groove ball bearing cage according to claim 2, characterized in that: The pressing plate (42) is pressed against a nut which is threadedly connected to the end of the core shaft (5).

4. A method for detecting outer guide clearance of a deep groove ball bearing cage according to claim 1, characterized in that: A U-shaped groove is radially formed on the pressing plate (42), and the bottom of the U-shaped groove is connected to the center of the pressing plate (42).

5. A method for detecting outer guide clearance of a deep groove ball bearing cage according to claim 4, characterized in that: The anti-backlash hook of the bearing radial clearance measuring instrument (3) contacts the inner peripheral surface of the pressing block (41) adjacent to the flange (51).

6. A method for detecting outer guide clearance of a deep groove ball bearing cage according to claim 1, characterized in that: In step S2, a cylinder provided in a bearing radial clearance measuring instrument (3) is used to apply a radial load to the bearing outer ring (1).

7. A method for detecting outer guide clearance of a deep groove ball bearing cage according to claim 5, characterized in that: A countersunk hole is opened radially on the end surface of the flange (51), and the clearance-eliminating hook of the bearing radial clearance measuring instrument (3) passes through the countersunk hole and contacts the inner peripheral surface of the pressing block (41) adjacent to the flange (51).

8. A method for detecting outer guide clearance of a deep groove ball bearing cage according to claim 1, characterized in that: The bearing radial clearance measuring instrument (3) adopts an X095 type detector.

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