A bearing inner ring rotation test tool

Abstract

The present invention discloses a bearing inner ring rotation test fixture, comprising a bearing inner ring rotation shaft, a test bearing, a bearing inner ring sleeve retaining ring, a bearing outer ring sleeve retaining ring, an outer ring sleeve retaining ring fastening bolts, an inner ring sleeve retaining ring fastening bolts and a sensor installation assembly, characterized in that: the bearing inner ring rotation shaft is arranged on the left side of the overall structure, and the bearing inner ring rotates under the drive of the rotation shaft; the test bearing is installed at the journal of the bearing inner ring rotation shaft through interference fit; the bearing inner ring sleeve retaining ring is fixed on the bearing inner ring rotation shaft through the inner ring sleeve retaining ring fastening bolts; the bearing outer ring is arranged on the right side of the entire mechanism and cooperates with the outer ring of the test bearing; the sensor installation assembly is installed on the bearing outer ring. The present invention is a special fixture for a bearing composite testing machine, specifically a test fixture with inner ring rotation and outer ring fixed, which can perform life test on the test bearing under the condition of applying a single or composite load.

Description

Technical Field

[0001] The invention belongs to the field of bearing testing machines, and relates to a special fixture of a composite rolling bearing life testing machine, in particular to a special bearing test installation fixture with a rotating inner ring and a fixed outer ring. Background Art

[0002] Rolling bearings are one of the most widely used mechanical parts, and are also one of the most easily damaged components in mechanical equipment. Especially rolling bearings under high-speed and heavy-load conditions are prone to fatigue, cracks, erosion, indentation and other faults due to the long-term and repeated action of the contact stress on the working surface, which can cause bearing breakage, adhesion, burning and other phenomena, and further cause abnormalities in the entire equipment.

[0003] Therefore, the life test of rolling bearings before delivery can not only improve the production process of bearings, but also guide the timely replacement of bearings used on equipment. At present, there are few bearing testing equipment that can simultaneously meet axial loading, overturning loading and radial loading, and can withstand high-speed and heavy-load conditions for the life test of bearings. The present invention is a special tool for the composite testing equipment, specifically a test tool with a rotating inner ring and a fixed outer ring. Summary of the invention

[0004] The purpose of the invention is to provide a special fixture which is convenient to replace and suitable for a composite bearing testing machine tool.

[0005] The purpose and conception of the present invention are achieved through the following technical solutions:

[0006] A bearing inner ring rotation test tool, comprising a bearing inner ring rotation shaft, a test bearing, a bearing inner ring sleeve retaining ring, a bearing outer sleeve retaining ring, an outer ring sleeve retaining ring, an outer ring sleeve retaining ring fastening bolts, an inner ring sleeve retaining ring fastening bolts and a sensor mounting assembly, characterized in that the bearing inner ring rotation shaft is arranged on the left side of the overall structure, and is fixed to the rotation drive shaft through the bolt holes on the left end face, thereby driving the entire bearing inner ring rotation shaft to rotate; the test bearing is installed on the shaft neck of the bearing inner ring rotation shaft through an interference fit, and the width of the shaft neck is slightly smaller than that of the test bearing inner ring width; the bearing inner ring retaining ring is fixed to the bearing inner ring rotating shaft by the inner ring retaining ring fastening bolts, and is used for axial positioning of the test bearing; the bearing outer ring is arranged on the right side of the entire mechanism, and cooperates with the outer ring of the test bearing; the bearing outer ring retaining ring is arranged between the bearing inner ring rotating shaft and the bearing outer ring, and is connected to the bearing outer ring by the outer ring retaining ring fastening bolts, and the bearing outer ring retaining ring is provided with a boss with a step, which is used for axial positioning of the outer ring of the test bearing, and is clamped and fixed by the outer ring retaining ring fastening bolts; the sensor mounting assembly is installed on the bearing outer ring.

[0007] Furthermore, a mounting cone is provided on the left side of the bearing inner ring rotating shaft and cooperates with the cone of the drive shaft; and a ejector cone is provided on the right side of the bearing inner ring rotating shaft and cooperates with the axial loading ejector.

[0008] Furthermore, an axial loading arc surface is provided on the right side of the bearing sleeve, which can cooperate with axial loading and overturning loading. When the test bearing is simultaneously subjected to overturning loading and axial loading, a slight slip can be generated on the axial loading arc surface to prevent the axially loaded part from being subjected to the overturning load; an axial positioning hole is provided above the loading arc surface on the right side of the bearing sleeve to position the axially loaded part; a radial loading seat is provided on one side of the cylindrical surface of the bearing sleeve, which can cooperate with the radial loading device to apply a radial load to the test bearing.

[0009] Furthermore, the sensor mounting assembly includes a sensor mounting sleeve, a sensor mounting probe, a vibration sensor, an adjustment nut and a pressure spring, wherein one end of the sensor mounting probe contacts the outer ring of the test bearing, and the other end is connected to the vibration sensor, and is clearance-fitted with the inner hole of the sensor mounting sleeve; the vibration sensor is pressed on the sensor mounting probe by the pressure spring; the adjustment nut is threadedly connected to the sensor mounting sleeve, and tightening the pressure spring can adjust the clamping force between the vibration sensor and the sensor mounting probe.

[0010] Compared with the prior art, the present invention is a special test fixture for a composite bearing tester, which can complete the axial, radial and overturning loads on the outer ring of the test bearing during the rotation of the inner ring, and this loading can choose a single loading method or a combined loading method. The present invention is only a test fixture that can realize different loading methods of multiple loads, and the mechanism design is ingenious, which simplifies the test mechanism of the bearing and has the characteristics of easy disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the front overall axle side structure of the present invention.

[0012] Figure 2 It is a schematic diagram of the rear integral axle side structure of the present invention.

[0013] Figure 3 It is the front view of the present invention.

[0014] Figure 4 for Figure 3 Cross-sectional view in the AA direction.

[0015] Figure 5 Install the assembly for the sensor.

[0016] As shown in the figure: 1 is the rotating axis of the bearing inner ring, 1-1 is the mounting cone, 1-2 is the ejector cone, 2 is the test bearing, 3 is the bearing inner ring retaining ring, 4 is the bearing outer sleeve, 4-1 is the axial loading arc surface, 4-2 is the axial positioning hole, 4-3 is the radial loading seat, 5 is the bearing outer ring retaining ring, 6 is the outer ring retaining ring fastening bolt, 7 is the inner ring retaining ring fastening bolt, 8 is the sensor mounting assembly, 8-1 is the sensor mounting sleeve, 8-2 is the sensor mounting probe, 8-3 is the vibration sensor, 8-4 is the adjusting nut, and 8-5 is the pressure spring. DETAILED DESCRIPTION

[0017] The following specific examples further describe the purpose of the present invention in detail. The examples cannot be repeated here one by one, but the implementation mode of the present invention is not limited to the following examples.

[0018] Refer to the attached Figure 1 and attached Figure 4 A bearing inner ring rotation test tool, comprising a bearing inner ring rotation shaft 1, a test bearing 2, a bearing inner ring sleeve retaining ring 3, a bearing outer sleeve 4, a bearing outer ring sleeve retaining ring 5, an outer ring sleeve retaining ring fastening bolt 6, an inner ring sleeve retaining ring fastening bolt 7 and a sensor mounting assembly 8, characterized in that the bearing inner ring rotation shaft 1 is arranged on the left side of the overall structure, and is fixed to the rotation drive shaft through the bolt hole on the left end face, thereby driving the rotation of the entire bearing inner ring rotation shaft 1; the test bearing 2 is installed on the shaft neck of the bearing inner ring rotation shaft 1 through an interference fit, and the width of the shaft neck is slightly smaller than the inner ring of the test bearing 2 width; the bearing inner ring retaining ring 3 is fixed to the bearing inner ring rotating shaft 1 by the inner ring retaining ring fastening bolts 7, and is used for axial positioning of the test bearing 2; the bearing outer ring retaining ring 4 is arranged on the right side of the entire mechanism, and cooperates with the outer ring of the test bearing 2; the bearing outer ring retaining ring 5 is arranged between the bearing inner ring rotating shaft 1 and the bearing outer ring 4, and is connected to the bearing outer ring 4 by the outer ring retaining ring fastening bolts 6, and the bearing outer ring retaining ring 5 is provided with a step boss, which is used for axial positioning of the outer ring of the test bearing 2, and is clamped and fixed by the outer ring retaining ring fastening bolts 6; the sensor mounting assembly 8 is installed on the bearing outer ring 4.

[0019] Refer to the attached Figure 1 and attached Figure 2 The difference between this example and Example 1 is that a mounting cone 1-1 is provided on the left side of the bearing inner ring rotating shaft 1 and cooperates with the cone of the drive shaft; a ejector cone 1-2 is provided on the right side of the bearing inner ring rotating shaft 1 and cooperates with the axial loading ejector.

[0020] Refer to the attached Figure 2 and attached Figure 4The difference between this example and Example 1 is that an axial loading arc surface 4-1 is provided on the right side of the bearing sleeve 4, which can cooperate with the axial loading and overturning loading. When the test bearing 2 is simultaneously subjected to overturning loading and axial loading, a slight slip can be generated on the axial loading arc surface 4-1 to prevent the axially loaded part from being subjected to the overturning load; an axial positioning hole 4-2 is provided above the loading arc surface 4-1 on the right side of the bearing sleeve 4 to position the axially loaded part; a radial loading seat 4-3 is provided on one side of the cylindrical surface of the bearing sleeve 4, which can cooperate with the radial loading device to apply a radial load to the test bearing 2.

[0021] Refer to the attached Figure 5 and attached Figure 3 The difference between this example and Example 1 is that the sensor mounting assembly 8 includes a sensor mounting sleeve 8-1, a sensor mounting probe 8-2, a vibration sensor 8-3, an adjusting nut 8-4 and a pressure spring 8-5. One end of the sensor mounting probe 8-2 is in contact with the outer ring of the test bearing 2, and the other end is connected to the vibration sensor 8-3, and is clearance-fitted with the inner hole of the sensor mounting sleeve 8-1; the vibration sensor 8-3 is pressed on the sensor mounting probe 8-2 by the pressure spring 8-5; the adjusting nut 8-4 is threadedly connected to the sensor mounting sleeve 8-1, and the pressing force between the vibration sensor 8-3 and the sensor mounting probe 8-2 can be adjusted by pressing the pressure spring 8-5.

[0022] The working principle of this implementation is as follows:

[0023] When the present invention is working, the bearing inner ring rotating shaft 1 is connected to the main driving part, which can drive the rotation of the inner ring of the test bearing 2. The outer ring of the test bearing 2 and the bearing outer sleeve 4 are interference fit and fixed. Figure 4 Applying a load at F can load the test bearing 2 with an overturning load; when the radial loading seat 4-3 on the bearing sleeve 4 is pulled or pressed, the test bearing 2 can be loaded with radial tensile and compressive loads; through the loading arc surface 4-1 and the axial positioning hole 4-2 on the bearing sleeve 4, the outer ring of the test bearing 2 can be loaded with an axial load. A certain gap is set between the inner ring rotating shaft 1 of the bearing and the outer ring sleeve retaining ring 5 of the bearing to prevent the dynamic and static parts from rubbing against each other. When performing a bearing life test, the vibration signal of the test bearing 2 can be picked up by the vibration sensor 8-3 installed on the sensor mounting probe 8-2, and then the test analysis software can be used to perform data analysis to determine whether the test bearing 2 has a fault.

[0024] The above embodiments are only preferred examples of the present invention and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A bearing inner ring rotation test fixture, comprising a bearing inner ring rotation shaft (1), a test bearing (2), a bearing inner ring retaining ring (3), a bearing outer sleeve (4), a bearing outer ring retaining ring (5), an outer ring retaining ring fastening bolt (6), an inner ring retaining ring fastening bolt (7) and a sensor mounting assembly (8), characterized in that: The bearing inner ring rotating shaft (1) is arranged on the left side of the overall structure, and is fixed to the rotating drive shaft through the bolt hole on the left end face, thereby driving the rotation of the entire bearing inner ring rotating shaft (1); the test bearing (2) is installed on the journal of the bearing inner ring rotating shaft (1) through an interference fit, and the width of the journal is slightly smaller than the width of the inner ring of the test bearing (2); the bearing inner ring retaining ring (3) is fixed to the bearing inner ring rotating shaft (1) through the inner ring retaining ring fastening bolt (7), and is used for axial positioning of the test bearing (2); the bearing The outer sleeve (4) is arranged on the right side of the entire mechanism and cooperates with the outer ring of the test bearing (2); the outer ring sleeve retaining ring (5) of the bearing is arranged between the inner ring rotating shaft (1) of the bearing and the outer sleeve (4), and is connected to the outer sleeve (4) of the bearing by means of the outer ring sleeve retaining ring fastening bolts (6); the outer ring sleeve retaining ring (5) of the bearing is provided with a boss with a step, which is used for axially positioning the outer ring of the test bearing (2) and is clamped and fixed by means of the outer ring sleeve retaining ring fastening bolts (6); the sensor mounting assembly (8) is mounted on the bearing outer sleeve (4); The left side of the bearing inner ring rotating shaft (1) is provided with a mounting conical surface (1-1) which cooperates with the conical surface of the driving shaft; the right side of the bearing inner ring rotating shaft (1) is provided with an ejector conical surface (1-2) which cooperates with the axial loading ejector; The right side of the bearing sleeve (4) is provided with an axial loading arc surface (4-1) which can cooperate with the axial loading and the overturning loading. When the test bearing (2) is subjected to the overturning loading and the axial loading at the same time, a slight slip can be generated on the axial loading arc surface (4-1) to prevent the axial loading part from bearing the overturning load. An axial positioning hole (4-2) is provided above the axial loading arc surface (4-1) on the right side of the bearing sleeve (4) to position the axial loading part. A radial loading seat (4-3) is provided on one side of the cylindrical surface of the bearing sleeve (4) to cooperate with the radial loading device to apply a radial load to the test bearing (2).

2. The bearing inner ring rotation test fixture according to claim 1, characterized in that: The sensor installation assembly (8) comprises a sensor installation sleeve (8-1), a sensor installation probe (8-2), a vibration sensor (8-3), an adjustment nut (8-4) and a pressure spring (8-5); one end of the sensor installation probe (8-2) contacts the outer ring of the test bearing (2), and the other end is connected to the vibration sensor (8-3), and is clearance-matched with the inner hole of the sensor installation sleeve (8-1); the vibration sensor (8-3) is pressed on the sensor installation probe (8-2) by the pressure spring (8-5); the adjustment nut (8-4) is connected to the sensor installation sleeve (8-1) by threads, and the pressure spring (8-5) is pressed to adjust the pressing force between the vibration sensor (8-3) and the sensor installation probe (8-2).

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