CN110017983A - A kind of bearing inner race rotary test tooling - Google Patents

Abstract

The invention discloses a bearing inner ring rotation test tool, which comprises a bearing inner ring rotating shaft, a test bearing, a bearing inner ring retaining ring, a bearing outer casing, a bearing outer ring retaining ring, an outer ring retaining ring fastening bolt, an inner ring retaining ring The fastening bolt and the sensor installation assembly are characterized in that: the rotating shaft of the inner ring of the bearing is arranged on the left side of the overall structure, and the inner ring of the bearing is rotated under the driving of the rotating shaft; the test bearing is installed in the bearing through interference fit At the journal of the rotating shaft of the ring; the retaining ring of the inner ring of the bearing is fixed on the rotating shaft of the inner ring of the bearing through the fastening bolts of the inner ring of the bearing; The sensor mounting assembly is mounted on the bearing housing. The invention is a special tooling for bearing compound testing machine, specifically a fixed testing tooling with inner ring rotating and outer ring, which can perform life test on the test bearing under the condition of applying single or compound load.

Description

A bearing inner ring rotation test tool

technical field

The invention belongs to the field of bearing testing machines, and relates to a special fixture for a composite rolling bearing life testing machine, in particular to a special bearing testing installation fixture with an inner ring rotating and an outer ring fixed.

Background technique

Rolling bearing is one of the most widely used mechanical parts, and it is also one of the most easily damaged components in mechanical equipment, especially rolling bearings under high-speed and heavy-load conditions, due to the long-term repeated action of contact stress on the working surface, it is easy to cause fatigue, Cracks, erosion, indentation and other faults will cause the bearing to break, stick, burn and other phenomena, and then cause the abnormality of the entire equipment.

Therefore, the life test of the rolling bearing before leaving the factory can not only improve the production process of the bearing, but also guide the timely replacement of the bearing used on the equipment. At present, there are few bearing testing equipments that can meet axial loading, overturning loading and radial loading simultaneously, and can withstand high-speed and heavy-load conditions for life testing of bearings. The tooling is specifically a test tooling with a fixed inner ring and an outer ring.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a special fixture which is convenient to replace and suitable for compound bearing testing machine tools.

Purpose and conception of the present invention are achieved through the following technical solutions:

A bearing inner ring rotation test tool, comprising a bearing inner ring rotating shaft, a test bearing, a bearing inner ring retaining ring, a bearing outer sleeve, a bearing outer ring retaining ring, outer ring retaining ring fastening bolts, inner ring retaining ring fastening bolts and The sensor installation assembly is characterized in that the rotating shaft of the inner ring of the bearing is arranged on the left side of the overall structure, and is mutually fixed with the rotating drive shaft through the bolt hole on the end face of the left side, thereby driving the rotating shaft of the entire bearing inner ring to rotate; The test bearing is installed at the journal of the rotating shaft of the bearing inner ring through interference fit, and the width of the journal is slightly smaller than the width of the inner ring of the test bearing; the inner ring retaining ring of the bearing is fixed on the bearing inner ring by the inner ring retaining ring fastening bolts On the rotating shaft, it is used to axially locate the test bearing; the bearing outer ring is arranged on the right side of the whole mechanism and cooperates with the outer ring of the test bearing; the bearing outer ring sleeve retaining ring is arranged between the rotating shaft of the bearing inner ring and the bearing outer ring, It is connected with the bearing casing through the outer ring retaining ring fastening bolts. The bearing outer ring retaining ring is provided with a boss with a step, which is used to axially locate the outer ring of the test bearing, and is clamped by the outer ring retaining ring fastening bolts. Tightly secure; the sensor mounting assembly is mounted on the bearing housing.

Further, the left side of the rotating shaft of the bearing inner ring is provided with a mounting tapered surface, which cooperates with the tapered surface of the drive shaft; the right side of the rotating shaft of the bearing inner ring is provided with a taper surface of a thimble to cooperate with the axial loading thimble. .

Further, the right side of the bearing casing is provided with an axial loading arc surface, which can cooperate with axial loading and overturning loading. When overturning loading and axial loading are simultaneously performed on the test bearing, the axial loading can be A slight slip occurs on the arc surface to prevent the axial loading part from bearing overturning load; there is an axial positioning hole above the loading arc surface on the right side of the bearing shell, which can locate the axial loading part; the cylindrical surface of the bearing shell There is a radial loading seat on one side, which can be used with the radial loading device to apply radial load to the test bearing.

Further, the sensor installation assembly includes a sensor installation jacket, a sensor installation probe, a vibration sensor, an adjustment nut and a compression spring, one end of the above-mentioned sensor installation probe is in contact with the outer ring of the test bearing, and the other end is in contact with the vibration sensor. The vibration sensor is pressed on the sensor installation probe by the compression spring; the adjusting nut is connected to the sensor installation outer sleeve through the thread, and the compression spring can be adjusted to adjust the vibration sensor and the sensor installation sleeve. The compression force between the sensor mounting probes.

Compared with the prior art, the present invention is a special test tool for the composite bearing testing machine, which can make the inner ring complete the loading of the axial, radial and overturning loads on the outer ring of the test bearing during the rotation process. , and this loading can choose a single loading method or a combined loading method. The invention can realize loading of various loads in different ways with only one testing tool, and the mechanism design is ingenious, which simplifies the testing mechanism of the bearing, and also has the characteristics of convenient disassembly and assembly.

Description of drawings

FIG. 1 is a schematic diagram of the front integral axle side structure of the present invention.

FIG. 2 is a schematic diagram of the rear overall shaft side structure of the present invention.

FIG. 3 is a front view of the present invention.

FIG. 4 is a cross-sectional view in the direction A-A of FIG. 3 .

Figure 5 is a sensor mounting assembly.

As shown in the picture: 1 is the rotating shaft of the bearing inner ring, 1-1 is the installation cone, 1-2 is the thimble cone, 2 is the test bearing, 3 is the bearing inner ring retaining ring, 4 is the bearing outer sleeve, 4-1 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 bolts, 8 is the sensor installation assembly, 8-1 is the sensor installation jacket, 8-2 is the sensor installation probe, 8-3 is the vibration sensor, 8-4 is the adjustment nut, and 8-5 is the compression spring.

Detailed ways

The following specific examples further describe the purpose of the present invention in detail, and the examples cannot be repeated here, but the embodiments of the present invention are not limited to the following examples.

Referring to Figures 1 and 4, a bearing inner ring rotation test tool includes a bearing inner ring rotating 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 sleeve The retaining ring fastening bolt 6, the inner ring retaining ring fastening bolt 7 and the sensor installation assembly 8 are characterized in that the bearing inner ring rotating shaft 1 is arranged on the left side of the overall structure, and the bolts on the left end face The hole and the rotating drive shaft are fixed to each other, thereby driving the rotation of the entire bearing inner ring rotating shaft 1; the test bearing 2 is installed at the journal of the bearing inner ring rotating shaft 1 through an interference fit, and the width of the journal is slightly smaller than that of the test bearing 2 The width of the inner ring; the inner ring retaining ring 3 of the bearing is fixed on the rotating shaft 1 of the inner ring of the bearing through the inner ring retaining ring fastening bolt 7, which is used for axial positioning and testing of the bearing 2; the bearing outer sleeve 4 is arranged on the right side of the whole mechanism, And it cooperates with the outer ring of the test bearing 2; the outer ring retaining ring 5 of the bearing is arranged between the rotating shaft 1 of the bearing inner ring and the bearing outer casing 4, and is connected to the bearing outer casing 4 through the outer ring retaining ring fastening bolt 6, and the outer part of the bearing is connected. The snare retaining ring 5 is provided with a stepped boss for axially positioning the outer ring of the test bearing 2 , and is clamped and fixed by the outer ring retaining ring fastening bolts 6 ;

Referring to Figure 1 and Figure 2, the difference between this example and Embodiment 1 is that the left side of the bearing inner ring rotating shaft 1 is provided with a mounting tapered surface 1-1, which cooperates with the tapered surface of the drive shaft; The right side of the rotating shaft 1 of the inner ring of the bearing is provided with a thimble conical surface 1-2 to cooperate with the axially loaded thimble.

Referring to Figures 2 and 4, the difference between this example and Embodiment 1 is that the right side of the bearing housing 4 is provided with an axial loading arc surface 4-1, which can cooperate with the axial loading and overturning loading. , when the test bearing 2 is simultaneously overturned and axially loaded, a slight slip can be generated on the axially loaded arc surface 4-1 to prevent the axially loaded part from bearing the overturning load; the loading circle on the right side of the bearing shell 4 An axial positioning hole 4-2 is arranged above the arc surface 4-1, which can locate the axial loading part; one side of the cylindrical surface of the bearing shell 4 is provided with a radial loading seat 4-3, which can cooperate with the radial loading device A radial load is applied to the test bearing 2.

Referring to FIG. 5 and FIG. 3 , the difference between this example and Embodiment 1 is that the sensor installation assembly 8 includes a sensor installation jacket 8-1, a sensor installation probe 8-2, a vibration sensor 8-3, an adjustment Nut 8-4 and compression spring 8-5, one end of the above-mentioned sensor installation probe 8-2 is in contact with the outer ring of the test bearing 2, the other end is connected with the vibration sensor 8-3, and is connected with the sensor installation jacket 8-1 The inner hole is a clearance fit; the vibration sensor 8-3 is pressed on the sensor installation probe 8-2 by the compression spring 8-5; the adjusting nut 8-4 is screwed on the sensor installation jacket 8-1, and the The compression spring 8-5 can adjust the compression force between the vibration sensor 8-3 and the sensor installation probe 8-2.

This implementation works as follows:

When the present invention is working, the bearing inner ring rotating shaft 1 is connected with the main driving part, which can drive the rotation of the inner ring of the test bearing 2, and the outer ring of the test bearing 2 and the bearing shell 4 are interference fit and fixed. When a load is applied at Fig. 4F, the test bearing 2 can be loaded with an overturning load; when the radial load seat 4-3 on the bearing shell 4 is pulled or compressed, the test bearing 2 can be loaded with a radial tensile and compressive load. ; Through the loading arc surface 4-1 and the axial positioning hole 4-2 on the bearing shell 4, the outer ring of the test bearing 2 can be loaded with an axial load. There is a certain gap between the rotating shaft 1 of the inner ring of the bearing and the retaining ring 5 of the outer ring of the bearing, which can prevent the rubbing of the dynamic and static parts. When carrying out the 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 installation probe 8-2, and then the data analysis is performed by the test analysis software to determine whether the test bearing 2 is faulty.

The above-mentioned embodiments are only preferred examples of the present invention, and are not intended to limit the embodiments of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can also be made on the basis of the above-mentioned descriptions. , it is not necessary and impossible to enumerate all the embodiments here, and any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention should be included within the scope of protection of the claims of the present invention.

Claims (4)

1. A bearing inner ring rotation test tool, comprising a bearing inner ring rotating shaft (1), a test bearing (2), a bearing inner ring retaining ring (3), a bearing outer sleeve (4), and a bearing outer ring retaining ring (5) , the outer ring retaining ring fastening bolt (6), the inner ring retaining ring fastening bolt (7) and the sensor installation assembly (8), characterized in that the bearing inner ring rotating shaft (1) is arranged in the overall structure The left side of the bearing is fixed with the rotating drive shaft through the bolt holes on the left end face, so as to drive the rotation of the entire bearing inner ring rotating shaft (1); the test bearing (2) is installed on the bearing inner ring rotating shaft ( 1), and the width of the journal is slightly smaller than the width of the inner ring of the test bearing (2). (1), it is used to axially locate the test bearing (2); the bearing shell (4) is located on the right side of the whole mechanism, and cooperates with the outer ring of the test bearing (2); the bearing outer ring is set to the retaining ring (5) It is arranged between the rotating shaft (1) of the bearing inner ring and the bearing outer casing (4), and is connected with the bearing outer casing (4) through the outer ring retaining ring fastening bolt (6), and the bearing outer ring retaining ring (5) is provided with a belt. The stepped boss is used to axially locate the outer ring of the test bearing (2), and is clamped and fixed by the outer ring retaining ring fastening bolts (6); the sensor installation assembly (8) is installed on the bearing housing (4) )superior. 2. The bearing inner ring rotation test tool according to claim 1, characterized in that: the left side of the bearing inner ring rotating shaft (1) is provided with a mounting tapered surface (1-1), which is connected to the drive shaft. The conical surfaces cooperate with each other; the right side of the rotating shaft (1) of the inner ring of the bearing is provided with a thimble conical surface (1-2) to cooperate with the axially loaded thimble. 3. The bearing inner ring rotation test fixture according to claim 1, characterized in that: the right side of the bearing shell (4) is provided with an axial loading arc surface (4-1), which can be combined with the axial loading In cooperation with overturning loading, when overturning loading and axial loading are performed on the test bearing (2) at the same time, slight slippage can be generated on the axially loaded arc surface (4-1) to prevent the axially loaded part from bearing the overturning load ;Axial positioning hole (4-2) is provided above the axial loading arc surface (4-1) on the right side of the bearing shell (4), which can locate the axially loaded part; the cylindrical surface of the bearing shell (4) A radial loading seat (4-3) is provided on one side of the test bearing, which can cooperate with the radial loading device to apply radial load to the test bearing (2). 4. The bearing inner ring rotation test tool according to claim 1, wherein the sensor installation assembly (8) comprises a sensor installation jacket (8-1), a sensor installation probe (8-2), Vibration sensor (8-3), adjusting nut (8-4) and compression spring (8-5). One end of the above-mentioned sensor installation probe (8-2) is in contact with the outer ring of the test bearing (2), and the other end is in contact with the outer ring of the test bearing (2). It is connected with the vibration sensor (8-3), and has a clearance fit with the inner hole of the sensor installation casing (8-1); the vibration sensor (8-3) is pressed against the sensor installation probe ( 8-2); the adjusting nut (8-4) is screwed on the sensor installation jacket (8-1), and the compression spring (8-5) is pressed at the same time to adjust the vibration sensor (8-3) and the sensor installation Compression force between probes (8-2).