Axial guide angle measuring device of bearing inner ring
By designing a bearing inner ring axial guide angle measuring device including a micrometer, a base, a measuring head and a paddle, a sliding block and a spring structure are used to achieve fast and accurate axial guide angle measurement, which solves the problem of low measurement efficiency in the existing technology and improves the batch measurement efficiency and product quality of bearing inner rings.
Patent Information
- Application Number
- CN202422976268.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-12-04
AI Technical Summary
The existing technology for measuring the axial guide angle of the bearing inner ring has low efficiency, cannot meet the needs of mass production, and takes a long time to measure.
A device for measuring the axial guide angle of the bearing inner ring is designed, which includes a micrometer, a base, a measuring head and a pick. A sliding block and a spring structure are used to achieve fast and accurate axial guide angle measurement. Whether the axial guide angle is within the tolerance range is judged by the contact surface between the sliding block and the bearing inner ring.
The batch measurement efficiency of the axial guide angle of the bearing inner ring has been greatly improved. It only takes 0.2 minutes to measure the inner ring of a single bearing, which significantly improves product quality and installation qualification rate.
Smart Images
Figure CN223389114U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a measuring tool for bearing production, in particular to an axial guide angle measuring device for a bearing inner ring. Background Art
[0002] The axial guide angle of the bearing inner ring is generally 15°, with an allowable tolerance of 15°±2°. The axial guide angle plays a relatively important role in bearing installation. Its function is to guide the bearing inner ring smoothly into the installation position, avoid misalignment and tilting of the bearing during installation, and reduce stress concentration during bearing assembly, thereby extending the bearing's service life.
[0003] If the axial guide angle of the bearing inner ring exceeds the allowable tolerance range, it may cause problems such as improper bearing assembly, tilting, and stress concentration, resulting in poor bearing installation. Therefore, it is particularly important to measure the axial guide angle of the bearing inner ring before shipment. To measure the axial guide angle of the bearing inner ring, existing bearing manufacturers mostly use a small sample measurement method and a profilometer to measure the axial guide angle. Although the measurement accuracy is high, the measurement time is long, and the measurement time required for a single bearing inner ring is approximately 3 to 5 minutes. The measurement efficiency is low and cannot meet the needs of large-scale measurement. Utility Model Content
[0004] The technical problem to be solved by the present invention is to provide a convenient and quick-to-use axial guide angle measuring device for the inner ring of a bearing, in response to the deficiencies of the existing technology. The device can greatly improve the operability and measurement efficiency of batch measurement of the axial guide angle of the inner ring of the bearing. It only takes about 0.2 minutes to measure the axial guide angle of the inner ring of a single bearing. Compared with the traditional method, the measurement efficiency is greatly improved, which can effectively improve the product quality of the bearing and the qualified rate of the bearing installation.
[0005] The technical solution adopted by the present invention to solve the above technical problems is: a device for measuring the axial guide angle of the inner ring of a bearing, comprising a micrometer, a base, a measuring head and a paddle, wherein the micrometer is upright mounted on the base, the paddle is connected to the measuring rod of the micrometer, the paddle is used to drive the measuring rod to move up and down, the measuring head is fixed to the bottom end of the measuring rod, and the bottom of the measuring head is elastically connected to two arched sliding blocks, each of the sliding blocks can slide laterally, the outer diameter of each sliding block is adapted to the inner diameter of the inner ring of the bearing, and the radial outer diameter of each sliding block is adapted to the inner diameter of the inner ring of the bearing. The surface is a measuring reference surface, which is inclined from top to bottom toward the radial inner side of the sliding block, and the angle between the measuring reference surface and the vertical direction is 15°±10′. A limit block for positioning the inner ring of the bearing is provided directly below the measuring head. When measuring the axial guide angle of the inner ring of the bearing, the inner ring of the bearing is placed on the limit block, and the paddle is operated to move the measuring rod down until the measuring reference surfaces on the two sliding blocks are in full contact with the chamfered surface of the inner ring of the bearing. At this time, the axial guide angle of the inner ring of the bearing is judged based on the reading of the needle of the micrometer whether it is within the allowable tolerance range.
[0006] The present invention's axial guide angle measuring device for bearing inner rings is quick and easy to use, allowing operators to measure and use it at any time, enabling batch measurement of the axial guide angle of bearing inner rings. This effectively screens out qualified bearing inner rings whose axial guide angle accuracy is consistent with the allowable tolerance range, and eliminates unqualified products. This measuring device can significantly improve the operability and measurement efficiency of batch measurement of the axial guide angle of bearing inner rings, effectively improving bearing product quality and the qualified installation rate of bearings. Compared to the 3-5 minutes required by traditional profilometers to measure the axial guide angle of a single bearing inner ring, the present invention's device only takes approximately 0.2 minutes to measure the axial guide angle of a single bearing inner ring, significantly improving measurement efficiency compared to traditional methods.
[0007] Preferably, the measuring head comprises two horizontal slideways, each of which communicates with a connecting groove on its underside. A ball stud is vertically connected to the top of each sliding block, which passes through one of the connecting grooves. The ball head of each ball stud is slidably mounted within one of the slideways. Each slideway is equipped with a spring, the outer end of each spring being connected to a ball head, and the inner end of each spring being connected to the measuring head. The sliding connection between the sliding block and the measuring head is achieved through the ball studs and springs, resulting in a simple and reliable structure. During batch measurement, when the axial guide angle of the bearing inner ring to be measured changes, the sliding block can adaptively adjust its lateral sliding displacement under the action of the spring force, meeting the measurement requirements of different bearing inner rings with varying axial guide angles. After the measurement of the previous bearing inner ring is completed, the measuring rod is raised, and the sliding blocks automatically move radially outward to their initial positions before measurement under the action of the spring force, preparing for the measurement of the next bearing inner ring.
[0008] As a further preferred feature, a limiting boss is integrally provided at the center of the bottom of the measuring head, the limiting boss being located radially inward of the two sliding blocks. The limiting boss is used to limit the displacement of the two sliding blocks when they move toward each other, thereby preventing damage to components caused by excessive displacement of the two sliding blocks in unexpected situations.
[0009] As a further preferred embodiment, the limiting boss is hemispherical, and the radial inner surface of each sliding block is provided with an inclined surface adapted to mate with the limiting boss. When each sliding block contacts and slides against the limiting boss, the inclined surface serves as the contact surface between the sliding block and the limiting boss, providing guidance and limiting for the sliding of the sliding block, thereby ensuring smoother movement of the sliding block.
[0010] As a further preference, a cover plate is provided on the outside of each slide, and the cover plate is fixed to the outer side wall of the measuring head. Each slide is filled with grease to reduce the sliding resistance of the sliding block. At the same time, the cover plate can prevent the ball head from falling out of the slide, thereby ensuring the normal use of the measuring device.
[0011] Preferably, the bottom of the gauge base is integrally provided with a base plate, the stop block is fixed to the base plate with an interference fit, and a positioning boss is integrally provided on the top of the stop block. The outer diameter of the positioning boss matches the inner diameter of the bearing inner ring, and the centerline of the positioning boss is aligned with the centerline of the measuring head. The positioning boss serves to quickly locate the bearing inner ring, further improving measurement efficiency.
[0012] As a further preference, a handle is integrally provided on the side of the watch stand to facilitate the transportation and placement of the device.
[0013] Preferably, a support rod is fixed to one side of the dial indicator case, the middle portion of the paddle is hinged to the support rod, and the front end of the paddle is connected to the measuring rod of the dial indicator.
[0014] Compared with the existing technology, the present invention has the following advantages: The present invention's bearing inner ring axial guide angle measuring device is quick and easy to use, allowing operators to measure and use it at any time, enabling batch measurement of the axial guide angle of the bearing inner ring. The present invention's measuring device can significantly improve the operability and measurement efficiency of batch measurement of the axial guide angle of the bearing inner ring, effectively improving the product quality of the bearings and the qualified installation rate of the bearings. Compared to the 3-5 minutes required by traditional profilometers to measure the axial guide angle of a single bearing inner ring, the present invention's device only takes about 0.2 minutes to measure the axial guide angle of a single bearing inner ring, significantly improving measurement efficiency compared to traditional methods. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 A front view of the measuring device in the embodiment when measuring a standard part;
[0016] Figure 2 A front view of the measuring device in the embodiment when the axial guide angle of the bearing inner ring to be measured is greater than 15°±10′;
[0017] Figure 3 for Figure 2 A magnified view of the local section at point A in the middle;
[0018] Figure 4 After removing the ball stud Figure 3 Middle B-direction view;
[0019] Figure 5 A front view of the measuring device in the embodiment when the axial guide angle of the bearing inner ring to be measured is less than 15°±10′;
[0020] Figure 6 for Figure 5 Enlarged view of point C in the middle;
[0021] The specific reference numerals in the figures are as follows:
[0022] 1-micrometer, 11-measuring rod, 12-needle, 2-base, 21-handle, 22-base plate, 3-measuring head, 31-slide, 32-connecting groove, 33-spring, 34-cover, 35-limiting boss, 4-paddle, 5-support rod, 6-sliding block, 61-measuring reference surface, 62-ball stud, 63-ball head, 64-inclined surface, 7-limiting block, 71-locating boss, 81-standard part, 82-bearing inner ring with axial guide angle greater than 15°±10′, 83-bearing inner ring with axial guide angle less than 15°±10′. DETAILED DESCRIPTION
[0023] The following is a further detailed description of the present invention in conjunction with the accompanying drawings. Components or structures not specified in the present invention are all based on conventional techniques in the field of mechanics.
[0024] Embodiment: A device for measuring the axial guide angle of a bearing inner ring, such as Figures 1 to 5 As shown, it includes a dial indicator 1, a base 2, a measuring head 3 and a paddle 4. The dial indicator 1 is upright mounted on the base 2. A support rod 5 is fixed to one side of the dial indicator 1 case. The middle part of the paddle 4 is hinged to the support rod 5. The front end of the paddle 4 is connected to the measuring rod 11 of the dial indicator 1. The paddle 4 is used to drive the measuring rod 11 to move up and down. The measuring head 3 is fixed to the bottom end of the measuring rod 11 through a threaded connection. Two arched sliding blocks 6 are elastically connected to the bottom of the measuring head 3. Each sliding block 6 can slide laterally. The outer diameter of each sliding block 6 is adapted to the inner diameter of the inner ring of the bearing. The radial surface of each sliding block 6 The surface is the measuring reference surface 61, which is inclined from top to bottom toward the radial inner side of the sliding block 6, and the angle between the measuring reference surface 61 and the vertical direction is 15°±10′. A limit block 7 for positioning the bearing inner ring is provided directly below the measuring head 3. When measuring the axial guide angle of the bearing inner ring, the bearing inner ring is placed on the limit block 7, and the paddle 4 is operated to move the measuring rod 11 down until the measuring reference surface 61 on the two sliding blocks 6 is in full contact with the chamfered surface of the bearing inner ring. At this time, the reading of the needle 12 of the micrometer 1 is used to judge whether the axial guide angle of the bearing inner ring is within the allowable tolerance range.
[0025] In this embodiment, two slideways 31 are horizontally arranged in the measuring head 3, and the lower side of each slideway 31 is communicated with a connecting groove 32. The upper part of each sliding block 6 is vertically connected to a ball stud 62, and each ball stud 62 is inserted into a connecting groove 32. The ball head 63 of each ball stud 62 is slidably arranged in a slideway 31. A spring 33 is installed in each slideway 31, and the outer end of each spring 33 is connected to a ball head 63, and the inner end of each spring 33 is connected to the measuring head 3; a cover plate 34 is provided on the outer side of each slideway 31, and the cover plate 34 is fixed to the outer wall of the measuring head 3 by bolts, and each slideway 31 is filled with grease; a hemispherical limiting boss 35 is integrally provided at the center of the bottom of the measuring head 3, and the limiting boss 35 is located radially inwardly of the two sliding blocks 6, and the radial inner surface of each sliding block 6 is provided with an inclined surface 64 adapted to the limiting boss 35.
[0026] In this embodiment, a handle 21 is integrally provided on the side of the dial base 2, a base plate 22 is integrally provided on the bottom of the dial base 2, the limit block 7 is fixed on the base plate 22 by interference fit, and a positioning boss 71 is integrally provided on the upper part of the limit block 7. The outer diameter of the positioning boss 71 is adapted to the inner diameter of the inner ring of the bearing, and the center line of the positioning boss 71 is on the same vertical line as the center line of the measuring head 3.
[0027] A method for measuring the axial guide angle of a bearing inner ring, implemented based on the measuring device of Example 1, comprises the following steps:
[0028] (1) A standard bearing inner ring part 81 with an axial guide angle of 15°±10′ is manufactured, and a defective bearing inner ring part 1 with an axial guide angle of 13°±10′ and a defective bearing inner ring part 2 with an axial guide angle of 17°±10′ are manufactured. The axial guide angles of the standard part 81, the defective part 1, and the defective part 2 are measured using a profilometer. The standard part 81, the defective part 1, and the defective part 2 can be used for a long time and only need to be calibrated regularly;
[0029] (2) Press the paddle 4 downward, lift the measuring rod 11, place the standard part 81 on the limit block 7, and then pull the paddle 4 upward to make the measuring rod 11 drive the measuring head 3 downward. When the measuring reference surface 61 on the two sliding blocks 6 is in full contact with the chamfered surface of the standard part 81, the measuring head 3 is limited and stops moving downward. At this time, return the needle 12 of the micrometer 1 to zero, as shown in the figure. Figure 1 As shown, the setting of the standard value of the axial guide angle is completed;
[0030] (3) Press the paddle 4 downward, lift the measuring rod 11, remove the standard part 81, place the defective part 1 on the limit block 7, and then pull the paddle 4 upward to make the measuring rod 11 drive the measuring head 3 to move downward. When the measuring reference surface 61 on the two sliding blocks 6 is in full contact with the chamfered surface of the defective part 1, the measuring head 3 is limited and stops moving downward. The position of the needle 12 at this time is marked as position 1 on the dial of the micrometer 1;
[0031] (4) Press down the paddle 4, lift the measuring rod 11, remove the defective part 1, place the defective part 2 on the limit block 7, and then pull up the paddle 4 so that the measuring rod 11 drives the measuring head 3 to move downward. When the measuring reference surface 61 on the two sliding blocks 6 is in full contact with the chamfered surface of the defective part 2, the measuring head 3 is limited and stops moving downward. The position of the needle 12 at this time is marked as position 2 on the dial of the micrometer 1. The position of the needle 12 at this time is marked on the dial of the micrometer 1, and then press down the paddle 4, lift the measuring rod 11, and remove the defective part 2. The reading between position 1 and position 2 on the dial of the micrometer 1 is the allowable tolerance range.
[0032] (5) Place the bearing inner ring whose axial guide angle needs to be measured on the limit block 7, then pull up the paddle 4, so that the measuring rod 11 drives the measuring head 3 to move downward. When the measuring reference surface 61 on the two sliding blocks 6 is in full contact with the chamfered surface of the bearing inner ring, the measuring head 3 is limited and stops moving downward. According to the reading of the needle 12 of the micrometer 1 at this time, it is judged whether the axial guide angle of the bearing inner ring is within the allowable tolerance range. Specifically, when the axial guide angle of the bearing inner ring 82 to be measured is greater than 15°±10′, due to the two sliding blocks 6, the axial guide angle of the bearing inner ring 82 to be measured is greater than 15°±10′. The angle between the measuring reference surface 61 and the vertical direction is smaller than the axial guide angle of the bearing inner ring 82 to be measured. After the measuring head 3 moves downward, a radial gap exists between the measuring reference surfaces 61 on the two sliding blocks 6 and the chamfered surface of the bearing inner ring 82. The two sliding blocks 6 move toward their respective radial outer sides. When the measuring head 3 moves downward to the right position, the measuring head 3 stops moving downward. The measuring reference surfaces 61 on the two sliding blocks 6 are in full contact with the chamfered surface of the bearing inner ring 82. The needle 12 of the micrometer 1 rotates to the right a certain distance. At this time, the state of the measuring device is as shown in the figure. Figure 2 As shown, it is judged whether the reading of the needle 12 of the micrometer 1 at this time is within the allowable tolerance range, so as to screen out qualified bearing inner rings whose axial guide angle accuracy is consistent with the allowable tolerance range, and eliminate unqualified products; similarly, when the axial guide angle of the bearing inner ring 83 to be measured is less than 15°±10′, after the measuring head 3 moves downward, since the angle between the measuring reference surface 61 on the two sliding blocks 6 and the vertical direction is greater than the axial guide angle of the bearing inner ring 83 to be measured, when the measuring head 3 moves downward until the measuring reference surface 61 on the two sliding blocks 6 contacts the chamfered surface of the bearing inner ring 83, the two sliding blocks 6 are pushed inward and move toward their respective radial inner sides. When the measuring head 3 moves down to the position, the measuring head 3 stops moving downward, and the needle 12 of the micrometer 1 rotates to the left for a certain stroke. At this time, the state diagram of the measuring device is as shown in FIG. Figure 5 As shown, it is determined whether the reading of the needle 12 of the micrometer 1 is within the allowable tolerance range at this time, thereby screening out qualified bearing inner rings whose axial guide angle accuracy is consistent with the allowable tolerance range and eliminating unqualified products.
[0033] Taking the batch measurement of the axial guide angles of 400 bearing inner rings as an example, using a traditional profilometer to measure the axial guide angles of 400 bearing inner rings took a total of 33 hours, and measuring the axial guide angle of a single bearing inner ring took an average of 4.95 minutes. However, using the new measuring device, the entire inspection of 400 bearing inner rings can be completed in just 80 minutes, and measuring the axial guide angle of a single bearing inner ring takes an average of only 0.2 minutes, significantly improving measurement efficiency.
Claims
1. A device for measuring the axial guide angle of a bearing inner ring, characterized in that: The dial indicator comprises a dial indicator, a dial base, a measuring head and a paddle. The dial indicator is upright mounted on the dial base. The paddle is connected to the measuring rod of the dial indicator. The paddle is used to drive the measuring rod to move up and down. The measuring head is fixed to the bottom end of the measuring rod. Two arched sliding blocks are elastically connected to the bottom of the measuring head. Each sliding block can slide laterally. The outer diameter of each sliding block is adapted to the inner diameter of the inner ring of the bearing. The radial outer surface of each sliding block is a measuring reference surface. The measuring reference surface is from top to bottom. The measuring rod is tilted downwardly toward the radial inner side of the sliding block, and the angle between the measuring reference surface and the vertical direction is 15°±10′. A limit block for positioning the bearing inner ring is provided directly below the measuring head. When measuring the axial guide angle of the bearing inner ring, the bearing inner ring is placed on the limit block, and the paddle is operated to move the measuring rod downward until the measuring reference surfaces on the two sliding blocks are in full contact with the chamfered surface of the bearing inner ring. At this time, the axial guide angle of the bearing inner ring is judged according to the reading of the needle of the micrometer whether it is within the allowable tolerance range.
2. The device for measuring the axial guide angle of a bearing inner ring according to claim 1, characterized in that: Two slides are horizontally arranged in the measuring head, and the lower side of each slide is communicated with a connecting groove. The upper part of each sliding block is vertically connected to a ball stud, and each ball stud is passed through one of the connecting grooves. The ball head of each ball stud can be slidably arranged in one of the slides. A spring is installed in each of the slides, and the outer end of each spring is connected to one of the ball heads, and the inner end of each spring is connected to the measuring head.
3. The device for measuring the axial guide angle of a bearing inner ring according to claim 2, characterized in that: A limiting boss is integrally provided at the center of the bottom of the measuring head, and the limiting boss is located radially inward of the two sliding blocks.
4. The device for measuring the axial guide angle of a bearing inner ring according to claim 3, characterized in that: The limiting boss is hemispherical, and the radial inner surface of each sliding block is provided with an inclined surface adapted to the limiting boss.
5. The device for measuring the axial guide angle of a bearing inner ring according to claim 2, characterized in that: A cover plate is provided on the outside of each slideway, and the cover plate is fixed to the outer side wall of the measuring head. Each slideway is filled with grease.
6. The device for measuring the axial guide angle of a bearing inner ring according to claim 1, characterized in that: The bottom of the table base is integrally provided with a base plate, the limit block is fixed on the base plate by interference fit, the upper part of the limit block is integrally provided with a positioning boss, the outer diameter of the positioning boss is adapted to the inner diameter of the bearing inner ring, and the center line of the positioning boss is on the same vertical line as the center line of the measuring head.
7. The device for measuring the axial guide angle of a bearing inner ring according to claim 6, characterized in that: A handle is integrally provided on the side of the watch base.
8. The device for measuring the axial guide angle of a bearing inner ring according to claim 1, characterized in that: A support rod is fixed to one side of the dial gauge case, the middle portion of the paddle is hinged to the support rod, and the front end of the paddle is connected to the measuring rod of the dial gauge.