Device and method for measuring center distance of thrust angular contact ball bearing channel

Abstract

The invention discloses a thrust angular contact ball bearing channel center distance measuring method, which comprises the following steps of: S1, erecting a centering shaft on an operation platform, sleeving a standard component on the centering shaft, enabling a first measuring head of a lever mechanism of a measuring module to touch the outer diameter of the standard component, and performing zero setting on a measuring instrument of the measuring module; s2, after the standard part is taken down, the first ferrule is arranged on the centering shaft in a sleeving mode; s3, arranging a plurality of steel balls in the channel of the first ferrule, and buckling the channel of the second ferrule on the steel balls; s4, a load block is installed on the second ferrule, and then the second ferrule is rotated; s5, after the second ferrule rotates stably, enabling a first measuring head of a lever mechanism of the measuring module to touch a steel ball, and enabling an output end of the lever mechanism to touch a second measuring head of a measuring instrument of the measuring module; and S6, observing the maximum value and the minimum value displayed by the measuring instrument to obtain the deviation value of the relative standard channel center distance. According to the invention, rotation measurement is carried out by applying a load, it is ensured that a steel ball falls into the bottommost part of a ferrule channel, and the center distance of the thrust angular contact ball bearing channel is indirectly measured by measuring an error between a ferrule to be measured and a standard component through a measuring instrument.

Description

Technical Field

[0001] The invention relates to the technical field of bearings, and in particular to a device and a method for measuring the center distance of a thrust angular contact ball bearing raceway. Background Art

[0002] At present, the center distance measurement method of thrust ball bearings in the bearing industry generally adopts the center distance sample for measurement, such as the attached Figure 1 and 2 As shown in the figure, the error range of the center distance is controlled by the position of the bearing ring and the large and small range of the center distance template. The advantage of this measurement method is that the measurement is simple and convenient. However, accurate measurement is required during the processing of the bearing ring to ensure the consistency of the center distance of the thrust bearing raceway and prevent the wear of the cage caused by the inconsistency between the center distance of the bearing ring raceway and the center distance of the cage due to the deviation of the center distance position. Therefore, convenient and accurate measurement of the center distance of the thrust ball bearing raceway is of great significance for grinding. Summary of the invention

[0003] The present invention provides a device and method for measuring the center distance of a thrust angular contact ball bearing raceway, so as to solve the above technical problems.

[0004] In order to achieve the above object, the technical solution of the present invention is:

[0005] A device for measuring the center distance of a thrust angular contact ball bearing raceway, comprising a measuring tool and a measuring module;

[0006] The measuring tooling includes: an operating platform, a centering shaft, a load block and a plurality of steel balls; the centering shaft is fixed on the operating platform, the first ring of the thrust angular contact ball bearing is sleeved on the centering shaft, a plurality of steel balls are arranged in the groove of the first ring, the groove of the second ring is buckled on the plurality of steel balls, the load block is installed on the second ring, and the load block applies an axial force to the second ring;

[0007] The measuring module comprises: a mounting seat, a lever mechanism and a measuring instrument; the mounting seat is mounted on an operating platform, the lever mechanism and the measuring instrument are mounted on the mounting seat, the first probe of the lever mechanism touches the steel ball along the radial direction of the thrust angular contact ball bearing, the output end of the lever mechanism touches the second probe of the measuring instrument, and the measuring instrument measures the displacement of the output end of the lever mechanism.

[0008] Preferably, the centering shaft comprises a centering shaft base and a centering shaft boss, the end surface of the first ferrule abuts against the upper surface of the centering shaft base, and the inner hole and the centering shaft boss are clearance-matched.

[0009] Preferably, the clearance between the inner hole of the first ferrule and the centering shaft boss is 0.02-0.05 mm.

[0010] Preferably, the lever mechanism includes: a lever, a spring, a limit pin and a first probe; the lever is rotatably connected to the mounting seat, one end of the lever is connected to the first probe, and the other end supports the second probe of the measuring instrument; the spring applies elastic force to the lever so that the lever has a tendency to detach from the second probe of the measuring instrument; under the action of the spring, the lever is pressed against the limit pin, so that the intersection point of the first probe and the steel ball is located on a horizontal plane passing through the center of the steel ball, and the lever arm is 1:1.

[0011] Preferably, a first sliding groove is provided on the mounting seat, the lever is rotatably connected to the adjustment block, the adjustment block is connected to the first sliding groove and can vertically slide along the first sliding groove to adjust the position, and a locking mechanism is installed on the adjustment block.

[0012] Preferably, the lever is rotatably sleeved on the lever spindle, and the lever spindle is fixed on the adjustment block; the lever spindle and the lever are clearance-fitted, and the fitting clearance is 0.03-0.05mm.

[0013] Preferably, the first probe includes a plane facade along the vertical direction and arc facades on both horizontal sides of the plane facade, and the arc facades are tangent to the plane facade and protrude toward the steel ball.

[0014] Preferably, the length of the plane vertical surface is 2 mm, the curvature of the arc vertical surface is 2 mm, the total length of the first measuring head is 4 mm, and the height of the first measuring head is 2 mm.

[0015] A method for measuring the center distance of a thrust angular contact ball bearing raceway comprises the following steps:

[0016] S1. Place the centering shaft on the operating platform, then put the standard part on the centering shaft, and then touch the first probe of the lever mechanism of the measuring module to the outer diameter of the standard part to zero the measuring instrument of the measuring module;

[0017] S2. After removing the standard part, put the first ring on the centering shaft;

[0018] S3, arranging a plurality of steel balls into the groove of the first ring, and then buckling the groove of the second ring onto the steel balls;

[0019] S4, installing a load block on the second ring and then rotating it;

[0020] S5. After the second ring rotates stably, the first probe of the lever mechanism of the measuring module touches the steel ball, and the output end of the lever mechanism touches the second probe of the measuring instrument of the measuring module;

[0021] S6. Observe the maximum and minimum values ​​displayed by the measuring instrument to obtain the deviation value relative to the standard channel center distance.

[0022] Preferably, the steel balls are steel balls actually used in the bearing and are fully distributed in the bearing grooves.

[0023] Beneficial effects:

[0024] First, the present application discloses a method for measuring the center distance of a thrust angular contact ball bearing raceway, which performs rotational measurement by applying a load to ensure that the steel ball falls into the bottom of the raceway of the ferrule, and indirectly measures the center distance of the thrust angular contact ball bearing raceway by measuring the error between the ferrule to be measured and the standard part through a measuring instrument. The raceway center distance can be conveniently and accurately measured in the actual production process, so that the operator can adjust the machine tool according to the measurement results at any time during production, thereby improving product quality and reducing rework costs.

[0025] Second, a thrust angular contact ball bearing raceway center distance measuring device disclosed in the present application can conveniently and accurately measure the raceway center distance by setting a measuring module and a measuring tool to cooperate with each other to complete the measurement during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 This is a schematic diagram of the small fan structure;

[0028] Figure 2 This is a schematic diagram of the large fan structure;

[0029] Figure 3 A schematic diagram of the structure of a device for measuring the center distance of a thrust angular contact ball bearing raceway disclosed in Example 1 of the present invention Figure 1 ;

[0030] Figure 4 A schematic diagram of a device for measuring the center distance of a thrust angular contact ball bearing raceway disclosed in Example 1 of the present invention Figure 2 ;

[0031] Figure 5 A simplified schematic diagram of a device for measuring the center distance of a thrust angular contact ball bearing raceway disclosed in Example 1 of the present invention Figure 1 ;

[0032] Figure 6 A simplified schematic diagram of a device for measuring the center distance of a thrust angular contact ball bearing raceway disclosed in Example 1 of the present invention Figure 2 ;

[0033] Figure 7 A simplified schematic diagram of a standard installation component for measuring the center distance of a thrust angular contact ball bearing raceway disclosed in Example 1 of the present invention Figure 1 ;

[0034] Figure 8 A simplified schematic diagram of a standard installation component for measuring the center distance of a thrust angular contact ball bearing raceway disclosed in Example 1 of the present invention Figure 2 ;

[0035] Fig. 9 A simplified schematic diagram of the lever mechanism of a device for measuring the center distance of a thrust angular contact ball bearing raceway disclosed in Example 1 of the present invention Figure 1 ;

[0036] Fig.10 A simplified schematic diagram of the lever mechanism of a device for measuring the center distance of a thrust angular contact ball bearing raceway disclosed in Example 1 of the present invention Figure 2 .

[0037] 11. Operating platform; 111. Second sliding groove; 12. Centering shaft; 121. Centering shaft base; 122. Centering shaft boss; 13. Load block; 14. Steel ball; 21. Mounting seat; 211. First sliding groove; 221. Lever; 2211. Horizontal section at input end; 2212. Vertical section at input end; 2213. Horizontal section at output end; 222. Spring; 223. Limit pin; 2241. Plane elevation; 2242. Arc elevation; 225. Lever spindle; 23. Measuring instrument; 24. Adjustment block; 31. First ring; 32. Second ring. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example 1

[0040] A thrust angular contact ball bearing raceway center distance measuring device, combined with Figure 3-Figure 10 As shown, it includes a measuring tool and a measuring module;

[0041] The measuring tooling includes: an operating platform 11, a centering shaft 12, a load block 13 and a plurality of steel balls 14; the centering shaft 12 is fixed on the operating platform 11, the first ring 31 of the thrust angular contact ball bearing is sleeved on the centering shaft 12, the plurality of steel balls 14 are arranged in the groove of the first ring 31, the groove of the second ring 32 is buckled on the plurality of steel balls 14, the load block 13 is installed on the second ring 32, and the load block 13 applies an axial force to the second ring 32;

[0042] The measuring module includes: a mounting seat 21, a lever mechanism and a measuring instrument 23; the mounting seat 21 is installed on the operating platform 11, the lever mechanism and the measuring instrument 23 are installed on the mounting seat 21, the first probe of the lever mechanism touches the steel ball 14 along the radial direction of the thrust angular contact ball bearing, the output end of the lever mechanism touches the second probe of the measuring instrument 23, and the measuring instrument 23 measures the displacement of the output end of the lever mechanism.

[0043] Specifically, the steel balls 14 are measuring steel balls of the same size as the steel balls actually used in the thrust angular contact ball bearing, and a plurality of steel balls 14 are distributed in the groove to meet the detection of the entire groove during the rotation process.

[0044] Specifically, the first ferrule 31 and the second ferrule 32 are made of continuously processed parts to ensure that the center distances of the two ferrules are consistent, thereby improving the measurement accuracy.

[0045] Preferably, the centering shaft 12 includes a centering shaft base 121 and a centering shaft boss 122 , and the end surface of the first ferrule 31 abuts against the upper surface of the centering shaft base 121 , and the inner hole and the centering shaft boss 122 are clearance-matched.

[0046] Preferably, the clearance between the inner hole of the first ferrule 31 and the centering shaft boss 122 is 0.02-0.05 mm to ensure measurement accuracy.

[0047] Specifically, the standard part for zero adjustment is in the shape of a ring, and the outer diameter dimension of the standard part is Dpw1 =Dpw+Dw, wherein Dpw is the bearing center distance, and Dw is the diameter of the steel ball 14 .

[0048] Specifically, the load block 13 is provided with a convex stopper to be positioned and connected with the inner hole of the second ring 32, so as to ensure that the load block 13 rotates together with the second ring 32 and ensure the stability of the rotation.

[0049] Preferably, the lever mechanism comprises: a lever 221, a spring 222, a stop pin 223 and a first probe; the lever 221 is rotatably connected to the mounting seat 21, one end of the lever 221 is connected to the first probe, and the other end holds the second probe of the measuring instrument 23; the spring 222 applies elastic force to the lever 221 so that the lever 221 has a tendency to separate from the second probe of the measuring instrument 23; the lever 221 is pressed against the stop pin 223 under the action of the spring 222, so that the tangent point between the first probe and the steel ball 14 is located on a horizontal plane passing through the center of the steel ball 14, and the lever arm of the lever 221 is 1:1. The change in the outer diameter value of the trajectory formed by the rotating plurality of steel balls 14 is converted to the display of the measuring instrument 23 through the lever mechanism, and the 1:1 lever arm makes the display value of the measuring instrument 23 the measured value, which is convenient for counting.

[0050] Preferably, the mounting seat 21 is provided with a first sliding groove 211, the lever 221 is rotatably connected to the adjustment block 24, the adjustment block 24 is connected to the first sliding groove 211 and can vertically slide along the first sliding groove 211 to adjust the position, and a locking mechanism is installed on the adjustment block 24. By moving the adjustment block 24 up and down, the first probe and the steel ball 14 are locked and fixed after the maximum value of the outer diameter of the track formed by the steel balls 14 is made to be equal in height.

[0051] Specifically, the operating platform 11 is provided with a second sliding groove 111, the mounting seat 21 is connected to the second sliding groove 111 and can slide horizontally along the second sliding groove 111 to adjust the position, and a locking mechanism is installed on the mounting seat 21 along the radial direction of the centering shaft 12. By horizontally moving the mounting seat 21, the first probe is tangent to the steel ball 14.

[0052] Specifically, the first sliding groove 211 and the second sliding groove 111 can be T-shaped grooves or dovetail grooves. The locking mechanism includes a slider and a screw. Take the first sliding groove 211 as a T-shaped groove as an example for explanation: the slider is T-shaped and matches the first sliding groove 211, and the screw passes through the through hole on the adjustment block 24 and the notch of the first sliding groove 211 in sequence and then is screwed into the threaded hole of the slider. Tightening the screw makes the slider press against the groove wall of the first sliding groove 211 to achieve locking of the position of the adjustment block 24.

[0053] Preferably, the lever 221 is rotatably sleeved on the lever spindle 225, and the lever spindle 225 is fixed on the adjustment block 24; the lever spindle 225 and the lever 221 are clearance matched, and the matching clearance is 0.03-0.05mm. The small clearance match between the lever spindle 225 and the lever 221 ensures the precision transmission of the lever mechanism.

[0054] Preferably, the first probe includes a plane vertical surface 2241 along the vertical direction and arc vertical surfaces 2242 on both sides of the plane vertical surface 2241, and the arc vertical surface 2242 is tangent to the plane vertical surface 2241 and protrudes toward the steel ball 14. The arc vertical surface 2242 guides the steel ball 14 to smoothly enter and leave the plane vertical surface 2241, avoiding the impact on the first probe caused by misalignment in the initial stage of rotation, and ensuring the accuracy of measurement.

[0055] Preferably, the length of the plane elevation 2241 is 2 mm, the curvature of the arc elevation 2242 is 2 mm, the total length of the first probe is 4 mm, and the height of the first probe is 2 mm. The first probe may be in the shape of a solid rod or a thin plate.

[0056] Specifically, the lever spindle 225 can be integrally formed with the adjustment block 24, and the lever spindle 225 is perpendicular to the adjustment block 24 to ensure horizontal installation. The lever 221 includes: an input end horizontal section 2211, an input end vertical section 2212, and an output end horizontal section 2213. The end of the input end horizontal section 2211 is connected to the first probe, the bottom end of the input end vertical section 2212 is connected to the input end horizontal section 2211 and is perpendicular to each other to form an "L" shape, the top end of the input end vertical section 2212 is connected to the output end horizontal section 2213 and is perpendicular to each other, and the output end horizontal section 2213 and the input end horizontal section 2211 are respectively located on both sides of the input end vertical section 2212. The upper surface of the output end horizontal section 2213 is processed with a measuring plane for contacting with the second probe. A through hole is provided at the connection position of the output end horizontal section 2213 and the input end horizontal section 2211 to connect with the lever spindle 225, and the lever spindle 225 serves as the fulcrum of the lever 221.

[0057] The limit pin 223 is inserted into the positioning hole of the adjustment block 24 and is located on the side of the input end vertical section 2212 facing the first probe. One end of the spring 222 is connected to the mounting seat 21, and the other end is connected to the output end horizontal section 2213. The spring 222 pulls the output end horizontal section 2213 to make the lever 221 have a tendency to rotate counterclockwise, and makes the input end vertical section 2212 resist the limit pin 223; at this time, the input end vertical section 2212 is vertical, the input end horizontal section 2211 and the output end horizontal section 2213 are horizontal, and the force arm L1 from the input end horizontal section 2211 to the axis of the lever spindle 225 is equidistant from the force arm L2 from the second probe to the axis of the lever spindle 225. In addition, the limit pin 223 can prevent the spring 222 from pulling the lever 221 too far, thereby avoiding affecting the contact between the steel ball 14 and the first probe.

[0058] Specifically, the measuring instrument 23 is a micrometer, which is mounted on the mounting base 21 via a stand. The stand can adjust the verticality and height of the micrometer so that the second probe of the micrometer contacts the output end of the lever mechanism, that is, the measuring plane of the lever 221 .

[0059] Example 2

[0060] A method for measuring the center distance of a thrust angular contact ball bearing raceway using a thrust angular contact ball bearing raceway center distance measuring device comprises the following steps:

[0061] S1. Place the centering shaft on the operating platform, then put the standard part on the centering shaft, and then touch the first probe of the lever mechanism of the measuring module to the outer diameter of the standard part to zero the measuring instrument of the measuring module;

[0062] S2. After removing the standard part, put the first ring on the centering shaft;

[0063] S3, arranging a plurality of steel balls into the groove of the first ring, and then buckling the groove of the second ring onto the steel balls;

[0064] S4, installing a load block on the second ring and then rotating it;

[0065] S5. After the second ring rotates stably, the first probe of the lever mechanism of the measuring module touches the steel ball, and the output end of the lever mechanism touches the second probe of the measuring instrument of the measuring module;

[0066] S6. Observe the maximum and minimum values ​​displayed by the measuring instrument to obtain the deviation value relative to the standard channel center distance.

[0067] The load is applied by the load block to exert an axial force on the second ring, and the steel ball is ensured to fall to the bottom of the ring groove by rotation to ensure the accurate measurement position. Then the measurement instrument is used to measure the error between the ring to be measured and the standard part to indirectly measure the center distance of the thrust angular contact ball bearing groove. In the actual production process, the center distance of the groove can be measured conveniently and accurately, so that the operator can adjust the machine tool according to the measurement results at any time during production, improve product quality, and reduce rework costs.

[0068] Preferably, the steel balls are steel balls actually used in the bearing and are fully distributed in the bearing grooves.

[0069] Specifically, in S1, after the standard part is put on the centering shaft, the position of the measuring module mounting seat and the height of the adjusting block are adjusted first so that the lever remains horizontal, thereby ensuring that the first side head remains upright, so that the first side head is tangent to the outer circumference of the standard part during the measurement process and the maximum outer diameter of the trajectory formed by several steel balls is measured during the rotation measurement.

[0070] Specifically, in S5, the micrometer can be used to assist in judging whether the second ring rotates smoothly. The micrometer is used to measure the upper surface of the second ring. When the displayed value of the micrometer fluctuates within a fixed range, it means that the error comes from the processing error of the second ring itself, and the steel ball has fallen to the bottom of the ring groove.

[0071] Specifically, when the second ring is rotated in S4, the operator first lifts the lever so that the first side head is separated from the steel ball to avoid interfering with the rotation of the second ring. After the second ring rotates 1-2 circles, the lever is lowered, and the measurement force applied by the spring ensures that the first side head is always in contact with the steel ball. At the same time, the load applied by the load block can offset the measurement force applied by the spring, ensuring that the steel ball is always at the bottom of the channel.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for measuring the center distance of a thrust angular contact ball bearing raceway, characterized in that: Including measuring fixture and measuring module; The measuring tool comprises: an operating platform (11), a centering shaft (12), a load block (13) and a plurality of steel balls (14); the centering shaft (12) is fixed on the operating platform (11), the first ring (31) of the thrust angular contact ball bearing is sleeved on the centering shaft (12), the plurality of steel balls (14) are arranged in the groove of the first ring (31), the groove of the second ring (32) is buckled on the plurality of steel balls (14), the load block (13) is installed on the second ring (32), and the load block (13) applies an axial force to the second ring (32) along the axial direction of the second ring (32); The measuring module comprises: a mounting seat (21), a lever mechanism and a measuring instrument (23); the mounting seat (21) is mounted on the operating platform (11), the lever mechanism and the measuring instrument (23) are mounted on the mounting seat (21), the first probe of the lever mechanism touches the steel ball (14) along the radial direction of the thrust angular contact ball bearing, the output end of the lever mechanism touches the second probe of the measuring instrument (23), and the measuring instrument (23) measures the displacement of the output end of the lever mechanism.

2. A device for measuring the center distance of a thrust angular contact ball bearing raceway according to claim 1, characterized in that: The centering shaft (12) comprises a centering shaft base (121) and a centering shaft boss (122); the end surface of the first ferrule (31) abuts against the upper surface of the centering shaft base (121), and the inner hole is clearance-matched with the centering shaft boss (122).

3. A device for measuring the center distance of a thrust angular contact ball bearing raceway according to claim 2, characterized in that: The clearance between the inner hole of the first ferrule (31) and the centering shaft boss (122) is 0.02-0.05 mm.

4. A device for measuring the center distance of a thrust angular contact ball bearing raceway according to claim 1, characterized in that: The lever mechanism comprises: a lever (221), a spring (222), a stop pin (223) and a first probe; the lever (221) is rotatably connected to the mounting seat (21), one end of the lever (221) is connected to the first probe, and the other end supports the second probe of the measuring instrument (23); the spring (222) applies elastic force to the lever (221) so that the lever (221) has a tendency to separate from the second probe of the measuring instrument (23); the lever (221) is pressed against the stop pin (223) under the action of the spring (222), so that the tangent point between the first probe and the steel ball (14) is located on a horizontal plane passing the center of the steel ball (14), and the lever arm of the lever (221) is 1:

1.

5. A device for measuring the center distance of a thrust angular contact ball bearing raceway according to claim 4, characterized in that: The mounting seat (21) is provided with a first sliding groove (211), the lever (221) is rotatably connected to the adjustment block (24), the adjustment block (24) is connected to the first sliding groove (211) and can vertically slide along the first sliding groove (211) to adjust the position, and a locking mechanism is installed on the adjustment block (24).

6. A device for measuring the center distance of a thrust angular contact ball bearing raceway according to claim 5, characterized in that: The lever (221) is rotatably sleeved on a lever spindle (225), and the lever spindle (225) is fixed on the adjustment block (24); the lever spindle (225) and the lever (221) are clearance-matched, and the clearance is 0.03-0.05 mm.

7. A device for measuring the center distance of a thrust angular contact ball bearing raceway according to claim 1, characterized in that: The first probe comprises a plane vertical surface (2241) along the vertical direction and arc vertical surfaces (2242) on both horizontal sides of the plane vertical surface (2241); the arc vertical surfaces (2242) are tangent to the plane vertical surface (2241) and protrude toward the steel ball (14).

8. A device for measuring the center distance of a thrust angular contact ball bearing raceway according to claim 7, characterized in that: The length of the plane vertical surface (2241) is 2 mm, the curvature of the arc vertical surface (2242) is 2 mm, the total length of the first probe is 4 mm, and the height of the first probe is 2 mm.

9. A method for measuring the center distance of a thrust angular contact ball bearing raceway using the thrust angular contact ball bearing raceway center distance measuring device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Place the centering shaft on the operating platform, then put the standard part on the centering shaft, and then touch the first probe of the lever mechanism of the measuring module to the outer diameter of the standard part to zero the measuring instrument of the measuring module; S2. After removing the standard parts, put the first ring on the centering shaft; S3, arranging a plurality of steel balls into the groove of the first ring, and then buckling the groove of the second ring onto the steel balls; S4, installing a load block on the second ring and then rotating it; S5, after the second ring rotates stably, the first probe of the lever mechanism of the measuring module touches the steel ball, and the output end of the lever mechanism touches the second probe of the measuring instrument of the measuring module; S6. Observe the maximum and minimum values ​​displayed by the measuring instrument to obtain the deviation value relative to the standard channel center distance.

10. A method for measuring the center distance of a thrust angular contact ball bearing raceway according to claim 9, characterized in that: The steel balls are actually used in the bearing and are fully distributed in the bearing grooves.

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