Axial clearance measuring tool for double-row angular contact ball bearing

Abstract

The utility model relates to an axial clearance measuring tool for a double-row angular contact ball bearing. The axial clearance measuring tool comprises a matched clamping and fixing mechanism, a bottom base supporting mechanism, a measuring mechanism and the double-row angular contact ball bearing, the matched type clamping and fixing mechanism comprises a plurality of clamping units, and the clamping units are located in the bearing, evenly arranged in the circumferential direction of the bearing and clamped on an inner ring of the bearing. The lower part of the bearing inner ring is supported by the bottom base supporting mechanism, so that a gap is formed between the lower end of the bearing and the upper end of the bottom base supporting mechanism; a measuring mechanism is installed on the surface of the upper end of the bearing inner ring and comprises an instrument measuring assembly and a movable measuring rod. One end of the instrument measuring assembly is fixedly mounted on the bearing inner ring, and the other end of the instrument measuring assembly is in contact with the movable measuring rod; the combined type inner ring axial fixing mechanism is adopted to clamp and fix the inner sleeve of the bearing, so that the split type inner sleeve of the bearing is fixed together, the whole inner sleeve is fixed, the outer sleeve rotates, and the measurement of the axial clearance of the bearing is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing play measuring frock, concretely relates to a kind of double-row angular contact ball bearing axial play measuring frock, belong to bearing measuring equipment technical field. BACKGROUND

[0002] The structure of double-row angular contact ball bearing is composed of a double-raceway outer ring, two single-raceway inner rings, a plurality of steel balls and a retainer bearing the plurality of steel balls. The inner ring of the bearing with such structure is a split structure, i.e., two half inner rings. After installation, the two inner rings are usually clamped and fixed by interference fit with corresponding connecting members on the machine, such as bearing seat, bracket or shaft. Before installation, the two inner rings cannot be clamped and fixed, so the play cannot be measured. SUMMARY

[0003] In view of the technical problems existing in the measurement of the play of the double-row angular contact ball bearing with the above structure, the utility model aims to provide a double-row angular contact ball bearing axial play measuring frock. The frock adopts a specially designed inner sleeve fixing mechanism, which can realize the clamping and fixing of the split bearing inner ring during measurement and realize the measurement of the axial play of the bearing.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a double-row angular contact ball bearing axial play measuring frock, comprising: a matched clamping and fixing mechanism, a bottom base support mechanism, a measuring mechanism and a double-row angular contact ball bearing; the matched clamping and fixing mechanism comprises a plurality of clamping units, which are evenly arranged on the inner ring of the bearing along the circumferential direction of the bearing and clamped on the inner ring of the bearing; the lower part of the inner ring of the bearing is supported by the bottom base support mechanism, so that a gap is formed between the lower end of the bearing and the upper end of the bottom base support mechanism; the upper end surface of the inner ring of the bearing is provided with a measuring mechanism, which comprises an instrument measuring assembly and a movable measuring rod; one end of the instrument measuring assembly is fixedly installed on the inner ring of the bearing, and the other end is in contact with the movable measuring rod; the movable measuring rod is placed above the bearing and in contact with the upper end surface of the outer ring of the bearing.

[0005] Further, the measuring mechanism is arranged at a position staggered and spaced apart from the positions of the plurality of clamping units evenly arranged in the bearing.

[0006] Specifically, the number of clamping units evenly arranged in the bearing is three sets, and the three sets are arranged at an angle of 120° between each adjacent set to form a three-point clamping and fixing from the center point of the bearing to the edge direction.

[0007] Further, the bearing inner ring is in split form, comprising two single-race half inner rings arranged in upper and lower positions, i.e., split into an upper half inner ring and a lower half inner ring;

[0008] Further, each set of the clamping unit comprises a clamping body and an auxiliary pad matched with the clamping body; the clamping body is in a half-frame structure, comprising a horizontal upper frame edge, a horizontal lower frame edge and a vertical connecting portion connected between the horizontal upper frame edge and the horizontal lower frame edge; a horizontal bolt hole is formed in the free end of the horizontal upper frame edge, and a bolt is arranged in the bolt hole; an auxiliary pad is matched and arranged below the bolt head; the clamping unit is in contact with the upper end surface of the upper half inner ring through the matched connection of the connecting bolt in the horizontal upper frame edge of the clamping body and the auxiliary pad, and the clamping unit is in contact with the lower end surface of the lower half inner ring through the upper surface of the horizontal lower frame edge of the clamping body, so as to form the fixed clamping of the clamping unit on the bearing inner ring.

[0009] Further, the horizontal upper frame edge, the horizontal lower frame edge and the vertical connecting portion are integrally formed;

[0010] Further, in order to meet the universality of the tooling, the auxiliary pad is replaced with different size specifications according to different bearing widths;

[0011] Further, the bolt and the auxiliary pad are matched in a groove embedding type of the bolt head and the auxiliary pad; the auxiliary pad is a cylindrical body with a groove matched with the bolt head on the upper end surface and a gasket on the lower end surface; in use, the bolt head is on the groove on the upper end surface of the auxiliary pad, and the lower end surface of the auxiliary pad is in contact with the upper end surface of the upper half inner ring through the gasket;

[0012] Further, another technical concept of the present scheme is that a bottom base support mechanism is arranged under the bearing, comprising a horizontal annular gasket and a plurality of support blocks placed on the horizontal annular gasket; the gap between the bearing and the bottom base support mechanism is formed by the support blocks;

[0013] Further, the number of the support blocks is three and they are arranged uniformly in the circumferential direction on the upper end surface of the horizontal annular gasket;

[0014] Further, the height of the support block is higher than or at least equal to the thickness of the horizontal lower frame edge of the clamping unit, so that the horizontal lower frame edge can be inserted into the gap.

[0015] Further, the instrument measuring assembly of the measuring mechanism comprises a meter stand, a fixed shaft, a meter rod, a connecting pin and a dial indicator; the dial indicator is connected to one end of the meter rod, the end of the meter rod is connected to the meter stand through the connecting pin, the meter stand is a magnetic meter stand and is magnetically adsorbed on the upper half inner ring; the pointer of the dial indicator is downward corresponding to the upper surface of the measuring rod;

[0016] Further, the measuring mechanism's measuring rod is a long strip plate with contact blocks on the lower surface of both ends; in use, the contact blocks on the lower surface of both ends of the measuring rod contact the upper end surface of the outer ring, the center position of the measuring rod below the dial gauge is pointed to and the measuring head at the front end of the measuring rod is contacted on the upper surface of the measuring rod, and then the dial gauge is adjusted to zero; then the outer ring is lifted up, and the value displayed by the dial gauge at this time is the actual axial clearance of the bearing outer ring; the above-mentioned dial gauge pointer is pointed to the middle position of the measuring rod to ensure the measurement accuracy, and the above-mentioned way that the measuring rod is supported on the end surface of the outer ring ensures that the horizontal measurement can be realized and the measurement error caused by the tilting of the outer ring when being lifted up is prevented.

[0017] Further, the contact blocks on the lower surface of both ends of the measuring rod are correspondingly provided in plurality according to the size of the bearing diameter; specifically, the number of the contact blocks on the lower surface of each end of the measuring rod is two and the contact blocks are continuously provided close to the edge of the end of the measuring rod.

[0018] The beneficial effects of the double-row angular contact ball bearing axial clearance measuring tool are as follows:

[0019] The inner sleeve of the bearing is clamped and fixed by the combined inner ring axial fixing mechanism, the split type bearing inner sleeve is fixed together, the whole inner sleeve is fixed and the outer sleeve is rotated, so that the axial clearance of the bearing is measured; the technical problem that the inner sleeve cannot be fixed and the clearance measurement cannot be realized during the clearance measurement of the bearing is solved; the measurement of different bearing specifications is realized with the cooperation of the auxiliary pad, the tool has a certain universality and wide application range; the overall device is supported by the bottom base support mechanism, the stability of the measurement is ensured, and the measurement result is accurate. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The double-row angular contact ball bearing axial clearance measuring tool structure.

[0021] Figure 2 The double-row angular contact ball bearing axial clearance measuring tool structure. Figure 1 Partial sectional view (hidden clamping unit).

[0022] Figure 3 The double-row angular contact ball bearing axial clearance measuring tool structure. Figure 1 Clamping body structure of the matched clamping and fixing mechanism.

[0023] Figure 4 The double-row angular contact ball bearing axial clearance measuring tool structure. Figure 3 Top view.

[0024] Figure 5 The double-row angular contact ball bearing axial clearance measuring tool structure. Figure 1 Auxiliary pad structure of the matched clamping and fixing mechanism.

[0025] Figure 6 The double-row angular contact ball bearing axial clearance measuring tool structure. Figure 1 Structure diagram of the bottom base support mechanism.

[0026] Figure 7 for Figure 6 A sectional view along line AA.

[0027] Figure 8 for Figure 1 Side view of the measuring rod of the measuring mechanism.

[0028] In the diagram, 1. Outer ring, 2. Upper half-inner ring, 3. Lower half-inner ring, 4. Auxiliary pad, 5. Horizontal upper frame edge, 6. Horizontal lower frame edge, 7. Vertical connecting part, 8. Bolt, 6.1. Upper surface of horizontal lower frame edge, 4.1. Groove, 9. Horizontal annular washer, 10. Support block, 11. Dial holder, 12. Fixed shaft, 13. Dial rod, 14. Connecting pin, 15. Dial indicator, 16. Measuring rod, 17. Contact block. Detailed Implementation

[0029] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0030] like Figures 1-8 An embodiment of the double-row angular contact ball bearing axial clearance measuring fixture shown includes: a matching clamping and fixing mechanism, a bottom base support mechanism, a measuring mechanism, and a double-row angular contact ball bearing; the matching clamping and fixing mechanism includes several sets of clamping units, which are evenly arranged along the circumference of the bearing and clamp the inner ring of the bearing; the lower part of the inner ring of the bearing is supported by the bottom base support mechanism so that the lower end of the bearing and the upper end of the bottom base support mechanism form a gap; a measuring mechanism is installed on the upper surface of the inner ring of the bearing, which includes an instrument measuring component and a movable measuring rod; one end of the instrument measuring component is fixedly installed on the inner ring of the bearing, and the other end contacts the movable measuring rod 16, which is placed above the bearing and contacts the upper surface of the outer ring 1 of the bearing;

[0031] The measuring mechanism is positioned alternately with the positions of several clamping units evenly distributed inside the bearing.

[0032] In this embodiment, the number of clamping units evenly arranged inside the bearing is set to three sets, and a three-point clamping and fixing is formed from the center point of the bearing to the edge by setting the angle between each two adjacent sets to 120°.

[0033] The bearing inner ring is in a split form, including two single-race half inner rings arranged in an upper and lower manner, i.e., split into an upper half inner ring 2 and a lower half inner ring 3;

[0034] Each set of the clamping unit includes a clamping body and an auxiliary pad 4 matched with the clamping body; the clamping body is in a half-frame structure, including a horizontal upper frame edge 5, a horizontal lower frame edge 6 and a vertical connecting part 7 connected between the horizontal upper frame edge and the horizontal lower frame edge; a bolt hole in a horizontal direction is formed at a free end of the horizontal upper frame edge 5, and a bolt 8 is arranged in the bolt hole; the auxiliary pad 4 is arranged below the bolt head in a matched manner; the clamping unit is in contact with the upper end surface of the upper half inner ring 2 through the matched bolt 8 in the horizontal upper frame edge 5 of the clamping body and the auxiliary pad 4; the clamping unit is in contact with the lower end surface of the lower half inner ring 3 through the upper surface 6.1 of the horizontal lower frame edge of the clamping body, so as to form the fixed clamping of the clamping unit on the bearing inner ring;

[0035] The clamping unit and the two half inner rings are fixed in one body to form a fixed assembly by adopting the above structure, so as to fix the bearing inner ring and allow the outer ring 1 to rotate relative to the inner ring.

[0036] The horizontal upper frame edge 5, the horizontal lower frame edge 6 and the vertical connecting part 7 are integrally formed;

[0037] In order to meet the universality of the tooling, the auxiliary pad 4 is replaced with different sizes according to different bearing widths; when the bearing width is large, the auxiliary pad with a lower height is replaced, and the clamping is performed through the adjustment of the bolt 8 of the horizontal upper frame edge 5 of the clamping body of the clamping unit;

[0038] The bolt 8 and the auxiliary pad 4 are matched in an embedded manner of the bolt head and the groove 4.1 of the auxiliary pad 4; the auxiliary pad 4 is a cylinder with the groove 4 matched with the bolt head at the upper end surface, and a gasket is arranged at the lower end surface; in use, the bolt head is arranged in the groove 4.1 at the upper end surface of the auxiliary pad 4, and the lower end surface of the auxiliary pad 4 is in abutment with the upper end surface of the upper half inner ring 2 through the gasket; the gasket is arranged to prevent the abrasion of the upper half inner ring 2 during the clamping; the groove 4.1 is arranged to guide the bolt 8, so that the bolt head and the auxiliary pad 4 are more easily aligned;

[0039] The auxiliary pad 4 not only has the function of being suitable for different bearing sizes, but also prevents the bumping of the inner ring surface caused by the direct contact of the bolt head with the end surface of the inner ring.

[0040] Another technical concept of the present scheme is that the bottom base support mechanism arranged below the bearing includes a horizontal annular gasket 9 and a plurality of support blocks 10 placed on the horizontal annular gasket; the gap between the bearing and the bottom base support mechanism is formed through the support of the plurality of support blocks 10;

[0041] The horizontal annular gasket 9 is arranged to ensure the leveling of the tooling and the stability of the tooling, and the gap is arranged to enable the clamping unit to clamp and ensure that the horizontal lower frame edge 6 of the clamping unit can be inserted into the gap to clamp the bearing;

[0042] The number of the support blocks 10 is three and they are arranged uniformly in the circumferential direction on the upper end surface of the horizontal annular gasket 9 to ensure the stable and balanced support of the bearing.

[0043] The height of the support block 10 is higher than or at least equal to the thickness of the horizontal lower frame edge 6 of the clamping unit, so that the horizontal lower frame edge 6 can be inserted into the gap.

[0044] The instrument measuring assembly of the measuring mechanism comprises a meter stand 11, a fixed shaft 12, a meter rod 13, a connecting pin 14 and a dial indicator 15, the dial indicator 15 is connected to one end of the meter rod 13, and the other end of the meter rod 13 is connected to the meter stand 11 through the connecting pin 14.

[0045] The meter stand 11 is a magnetic meter stand, and the meter stand 11 is magnetically attached to the upper half inner ring 2; the pointer of the dial indicator 15 faces downward and corresponds to the upper surface of the measuring rod 16.

[0046] The measuring rod 16 of the measuring mechanism is a long strip plate with contact blocks 17 on the lower surfaces of both ends.

[0047] In use, the contact blocks 17 on the lower surfaces of both ends of the measuring rod 16 are in contact with the upper end surface of the outer ring 1, the center position of the measuring rod 16 is pointed to by the measuring rod below the dial of the dial indicator 15, the measuring head at the front end of the measuring rod is in contact with the upper surface of the measuring rod 16, and then the dial indicator 15 is adjusted to zero; then the outer ring 1 is lifted upward, and the value displayed by the dial indicator 15 at this time is the actual axial clearance of the bearing outer ring.

[0048] The pointer of the dial indicator 15 is pointed to the middle position of the measuring rod 16 to ensure the accuracy of the measurement, and the two ends of the measuring rod 16 are arranged in this way to ensure that the horizontal measurement can be achieved and the measurement error caused by the tilting of the outer ring when it is lifted is prevented.

[0049] The contact blocks 17 on the lower surfaces of both ends of the measuring rod 16 are arranged in multiple according to the size of the bearing diameter, so that when the bearing specification is changed, the outer ring 1 of the bearing is in contact with the contact blocks 17 at different positions on the measuring rod 16, and the universality of the measuring rod 16 is increased; the contact blocks 17 and the measuring rod 16 are fixedly connected by welding or other fixing methods.

[0050] In this embodiment, the number of the contact blocks on the lower surfaces of both ends of the measuring rod is two and they are arranged continuously close to the edges of the ends of the measuring rod.

[0051] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0052] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0053] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0054] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0055] It is to be understood that the terms "including", "comprising", "incorporating", "having" or "containing" or the like are used inclusively and are not exclusionary or open ended. For example, a composition, process or method that includes (or includes the presence of) elements A, B and C can also include (or include the presence of) one or more additional elements or steps, whether or not specifically listed. A description utilizing terms such as "comprising" or "containing" to describe a combination shall also be applicable to elements or steps of for example, "consisting of" or "consisting essentially of".

Claims

1. A double-row angular contact ball bearing axial play measuring tool characterized by, The utility model relates to a kind of double-row angular contact ball bearing, including: Including:

2. The axial play measuring tool for double-row angular contact ball bearings according to claim 1, characterized in that: The utility model relates to a kind of double-row angular contact ball bearing, including:

3. The axial play measuring tool for double-row angular contact ball bearings according to claim 1, characterized in that: The utility model relates to a kind of double-row angular contact ball bearing, including:

4. The axial play measuring tool for double-row angular contact ball bearings according to claim 1, characterized in that: The utility model relates to a kind of double-row angular contact ball bearing, including:

5. The axial play measuring tool for double-row angular contact ball bearings according to claim 4, characterized in that: The utility model relates to a kind of double-row angular contact ball bearing, including:

6. The axial play measuring tool for double-row angular contact ball bearings according to claim 5, characterized in that: The utility model relates to a kind of double-row angular contact ball bearing, including:

7. The axial play measuring tool for double-row angular contact ball bearings according to claim 5, characterized in that: The utility model relates to a kind of double-row angular contact ball bearing, including:

8. The axial play measuring tool for double-row angular contact ball bearings according to claim 7, characterized in that: The utility model relates to a kind of double-row angular contact ball bearing, including:

9. The axial play measuring tool for double-row angular contact ball bearings according to claim 4, characterized in that: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a kind of double-row angular contact ball bearing, including: The utility model relates to a 10. The axial play measuring tool for double-row angular contact ball bearings according to claim 1, characterized in that: The measuring mechanism's measuring rod is a long strip with contact blocks on both ends of the lower surface; the contact blocks on both ends of the lower surface of the measuring rod contact the upper end surface of the outer ring, and the center position of the measuring rod is pointed by the dial below the dial through the dial, and the measuring head at the front end of the measuring rod contacts the upper surface of the measuring rod.

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