Bearing multi-parameter measuring device

Abstract

The utility model discloses a multi-parameter measuring device for a bearing. The multi-parameter measuring device comprises a base, a supporting rod, a mounting platform, a positioning piece, a wall thickness measuring mechanism, a groove diameter measuring mechanism and a groove position measuring mechanism, the lower end of the supporting rod is fixed to the base, and the mounting platform is arranged at the upper end of the supporting rod. The wall thickness measuring mechanism is arranged on the mounting platform, and a measuring rod of the wall thickness measuring mechanism penetrates through the mounting platform downwards; one end of the positioning piece is connected with the supporting rod; the groove diameter measuring mechanism comprises an upper limiting piece, a lower limiting piece and a groove diameter measuring gauge outfit; and the measuring end of the groove diameter measuring meter head is in contact with the outer end of the lower limiting assembly. The beneficial effects of the utility model are that the wall thickness measuring mechanism, the groove diameter measuring mechanism and the groove position measuring mechanism are integrated on one device, after a product to be measured is installed, a plurality of parameters can be measured at a time, the number of measuring instruments is reduced, the measuring error is effectively reduced, and the measuring precision and the measuring efficiency are improved.

Description

Technical Field

[0001] The utility model relates to a measuring device, in particular to a bearing multi-parameter measuring device. Background Art

[0002] With the rapid development of the bearing industry, the structure of bearing rings has become more and more complex. This change has driven stricter requirements for product quality monitoring during the manufacturing process, requiring more frequent and accurate inspections of more dimensions. While ensuring measurement accuracy, improving inspection speed and convenience has become the key to improving overall production efficiency.

[0003] For example, the outer ring of a common deep groove ball bearing ring usually needs to measure three dimensional parameters: groove diameter, groove position, and groove-outer diameter wall thickness difference. At present, no instrument has been designed that can detect the above multiple parameters at the same time; the existing traditional detection method is to prepare 2 to 3 special instruments and use different instruments to detect different parameters in succession. This detection method is cumbersome, inefficient, time-consuming and labor-intensive; as the number of instruments used increases, operators need to switch frequently between different instruments, which further prolongs the detection time and reduces production efficiency. In addition, due to the large number of instruments, human operating errors are prone to occur, including but not limited to: measurement errors caused by missing some instruments and incorrect detection techniques leading to misjudgment.

[0004] Therefore, there is an urgent need to design a device that can measure multiple parameters simultaneously. Summary of the invention

[0005] The utility model aims to provide a bearing multi-parameter measuring device to improve the detection efficiency in view of the deficiencies in the prior art.

[0006] The technical solution adopted by the utility model is: a bearing multi-parameter measuring device, including a base, a support rod, a mounting platform, a positioning member, a wall thickness measuring mechanism, a groove diameter measuring mechanism and a groove position measuring mechanism;

[0007] The base is arranged on the operating surface, the lower end of the support rod is fixed on the base, and the upper end of the support rod is provided with a mounting platform;

[0008] The wall thickness measuring mechanism is arranged on the mounting platform, and the measuring rod of the wall thickness measuring mechanism passes through the mounting platform downward;

[0009] One end of the positioning member is connected to the support rod;

[0010] The groove diameter measuring mechanism comprises an upper limit member, a lower limit member and a groove diameter measuring gauge;

[0011] The upper limit member, the lower limit member and the groove diameter measuring gauge are all mounted on the support rod, and the measuring end of the groove diameter measuring gauge contacts the outer end of the lower limit member;

[0012] The inner end of the lower limit member, the inner end of the upper limit member, the center of the end of the measuring rod of the wall thickness measuring mechanism, and the center of the cantilever end of the positioning member are located in the same plane and are coplanar with the center plane of the channel of the product to be measured;

[0013] The groove position measuring mechanism is installed on the support rod, and the measuring end of the groove position measuring mechanism is perpendicular to the center plane of the groove of the product to be measured;

[0014] The product to be tested is installed on the upper limit piece, the lower limit piece and the positioning piece.

[0015] According to the above scheme, the upper limit member includes an adjustment bracket, an upper plate body and an upper hemisphere; the outer end of the adjustment bracket is connected to the support rod, the inner end of the adjustment bracket is connected to the upper plate body, and the upper hemisphere is installed on the top of the upper plate body; the center line of the upper hemisphere is located on the center plane of the channel of the product to be tested.

[0016] According to the above scheme, the lower limit member includes a movable bracket, a lower plate body and a lower hemisphere; the movable bracket is hinged to the support rod through a pin shaft, and the inner and outer ends of the movable bracket can rotate up and down around the pin shaft; the outer end of the movable bracket contacts the measuring end of the groove diameter measuring head, the lower plate body is installed on the inner end of the movable bracket, and the lower hemisphere is arranged at the bottom of the lower plate body; the center line of the lower hemisphere is collinear with the center line of the upper hemisphere.

[0017] According to the above scheme, the top of the upper hemisphere and the bottom of the lower hemisphere are in contact with the center of the channel of the product to be tested.

[0018] According to the above solution, one end of the movable bracket close to the lower limit piece of the groove diameter is hinged to the support rod through a bracket spring.

[0019] According to the above scheme, the positioning member includes a positioning bracket and a positioning block; the outer end of the positioning bracket is connected to the support rod, and the positioning block is installed at the inner end of the positioning bracket. The positioning block is provided with a protrusion, which can extend into the channel of the product to be tested and contact the center of the channel.

[0020] According to the above solution, the center line of the upper hemisphere, the center line of the lower hemisphere, and the center line of the protrusion of the positioning bracket are coplanar.

[0021] According to the above scheme, the groove position measuring mechanism includes a groove position measuring head, which is installed on the support rod through a pull rod; the measuring head of the groove position measuring head is located on one side of the adjustment bracket and is perpendicular to the end face of the product to be measured.

[0022] According to the above scheme, an arc plate is arranged at the lower end of the pull rod, and the arc plate is adapted to the outer wall of the groove position measuring head; the groove position measuring head is installed at the lower end of the pull rod through the arc plate.

[0023] According to the above scheme, the wall thickness measuring mechanism includes a dial indicator and a measuring rod connected to the dial indicator, and the lower end axis of the measuring rod is colinear with the center line of the upper hemisphere.

[0024] The beneficial effects of the utility model are as follows: the utility model integrates a wall thickness measuring mechanism, a groove diameter measuring mechanism and a groove position measuring mechanism into one device; after the product to be measured is installed, the device of the utility model can be used to measure multiple parameters at one time; compared with the prior art, the number of measuring instruments is reduced, the burden on operators is reduced, the measurement error is effectively reduced, and the accuracy of the measurement result and the measurement efficiency are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a specific embodiment of the utility model.

[0026] Figure 2 It is the front view of this embodiment.

[0027] Figure 3 Schematic diagram of the working state of this embodiment.

[0028] Figure 4 Schematic diagram of the outer ring of the deep groove ball bearing in this embodiment.

[0029] Figure 5 Schematic diagram of parameters to be measured of the outer ring of the deep groove ball bearing in this embodiment.

[0030] Among them: 1. base; 2. support rod; 3. reinforcement plate; 4. side plate; 5. installation platform; 6. pull plate; 7. arc plate; 8. dial indicator; 9. measuring rod; 10. groove diameter measuring head; 11. adjustment bracket; 12. upper plate; 13. upper hemisphere; 14. movable bracket; 15. lower plate; 16. lower hemisphere; 17. spring; 18. groove position measuring head; 19. probe of groove position measuring mechanism; 20. probe of groove diameter measuring mechanism; 21. positioning bracket; 22. positioning block; 23. protrusion; 24. product to be measured; 25. groove; 26. center plane of groove. DETAILED DESCRIPTION

[0031] In order to better understand the present invention, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] like Figures 1 to 4 A bearing multi-parameter measuring device shown is specifically a bearing outer ring multi-parameter measuring device, including a base 1, a support rod 2, a mounting platform 5, a positioning member, a wall thickness measuring mechanism, a groove diameter measuring mechanism and a groove position measuring mechanism;

[0033] The base 1 is arranged on the operating surface, the lower end of the support rod 2 is fixed on the base 1, and the upper end of the support rod 2 is provided with a mounting platform 5;

[0034] The wall thickness measuring mechanism is arranged on the mounting platform 5, and the measuring rod 9 of the wall thickness measuring mechanism passes through the mounting platform 5 downward;

[0035] One end of the positioning member is connected to the support rod 2;

[0036] The groove diameter measuring mechanism comprises an upper limit member, a lower limit member and a groove diameter measuring gauge 10;

[0037] The upper limit member, the lower limit member and the groove diameter measuring gauge 10 are all installed on the support rod 2, and the measuring end of the groove diameter measuring gauge 10 is in contact with the outer end of the lower limit member;

[0038] The inner end of the lower limit member, the inner end of the upper limit member, the center of the end of the measuring rod 9 of the wall thickness measuring mechanism, and the center of the cantilever end of the positioning member are located in the same plane and are coplanar with the channel center plane 26 of the product 24 to be measured (that is, the plane where the channel center line is located);

[0039] The groove position measuring mechanism is installed on the support rod 2, and the measuring end of the groove position measuring mechanism is perpendicular to the groove center plane 26 of the product 24 to be measured;

[0040] The product 24 to be tested is mounted on the upper limit member, the lower limit member and the positioning member.

[0041] In the present invention, the product 24 to be tested is a bearing outer ring, and the groove of the bearing outer ring contacts the upper limit member, the lower limit member and the positioning member. The upper limit member, the lower limit member and the positioning member of the groove diameter measuring mechanism work together to form three fulcrums to achieve the positioning and installation of the product 24 to be tested.

[0042] In the utility model, the groove diameter measuring head 10 is connected to the side plate 4 fixed on the support rod 2.

[0043] In the present invention, the wall thickness measuring mechanism is used to measure the wall thickness difference between the product groove and the outer wall of the bearing outer ring (the wall thickness between the groove and the outer wall of the bearing outer ring, that is, the groove-outer diameter wall thickness a); the groove diameter measuring mechanism is used to measure the diameter b of the groove 25 of the bearing outer ring; the groove position measuring mechanism is used to measure the groove position size c of the bearing outer ring, that is, the distance between the end face of the bearing outer ring and the groove center plane 26. The groove of the bearing ring to be measured in this embodiment is set in the center.

[0044] Preferably, the upper limit member includes an adjusting bracket 11, an upper plate body 12 and an upper hemisphere 13; the outer end of the adjusting bracket 11 is connected to the support rod 2, the inner end (cantilever end) of the adjusting bracket 11 is connected to the upper plate body 12, and the upper hemisphere 13 is installed on the top of the upper plate body 12; the center line of the upper hemisphere 13 is located on the center plane of the channel of the product to be tested 24.

[0045] Preferably, the lower limit member includes a movable bracket 14, a lower plate body 15 and a lower hemisphere 16; the movable bracket 14 is hinged to the support rod 2 through a pin shaft, and the inner and outer ends of the movable bracket 14 can rotate up and down around the pin shaft; the outer end of the movable bracket 14 contacts the measuring end of the groove diameter measuring head 10, the lower plate body 15 is installed on the inner end of the movable bracket 14, and the lower hemisphere 16 is arranged at the bottom of the lower plate body 15; the center line of the lower hemisphere 16 is collinear with the center line of the upper hemisphere 13.

[0046] In the present invention, the top of the upper hemisphere 13 and the bottom of the lower hemisphere 16 can contact the center of the channel of the product 24 to be tested; the distance between the upper hemisphere 13 and the lower hemisphere 16 is also the channel diameter of the product 24 to be tested.

[0047] Preferably, one end of the movable bracket 14 close to the groove diameter lower limit piece is hinged to the support rod 2 through a bracket spring 17.

[0048] In the present invention, the support spring 17 pulls the movable support 14 to move clockwise and plays a resetting role.

[0049] In the present invention, the upper hemisphere 13 and the lower hemisphere 16 are both made of steel.

[0050] Preferably, the positioning member includes a positioning bracket 21 and a positioning block 22; the outer end of the positioning bracket 21 is connected to the support rod 2, and the positioning block 22 is installed at the inner end of the positioning bracket 21. The positioning block 22 is provided with a protrusion 23, which can contact the center of the channel of the product to be tested 24 to provide a fulcrum for the product to be tested.

[0051] In the utility model, the center line of the upper hemisphere 13, the center line of the lower hemisphere 16, and the center line of the protrusion 23 of the positioning bracket 21 are coplanar; the adjustment bracket 11, the movable bracket 14 and the positioning bracket 21 work together to provide three fulcrums through the upper hemisphere 13, the lower hemisphere 16 and the protrusion 23 to achieve the positioning and installation of the product 24 to be tested.

[0052] Preferably, the groove position measuring mechanism includes a groove position measuring head 18, which is installed on the support rod 2 through a pull rod 6; the measuring head of the groove position measuring head 18 is located on one side of the adjustment bracket 11 and is perpendicular to the end face of the product to be measured, that is, perpendicular to the groove center plane 26 of the product to be measured 24.

[0053] In the utility model, in order to improve the connection stability of the groove position measuring mechanism, an arc plate 7 is provided at the lower end of the pull rod 6, and the arc plate 7 is adapted to the outer wall of the groove position measuring head 18; the groove position measuring head 18 is installed at the lower end of the pull rod 6 through the arc plate 7.

[0054] Preferably, the wall thickness measuring mechanism comprises a dial gauge 8 and a measuring rod 9 connected to the dial gauge 8 , and the axis of the lower end (ie, the measuring end) of the measuring rod 9 is colinear with the center line of the upper hemisphere 13 .

[0055] In the utility model, the support rod 2 is arranged obliquely, and a reinforcing plate 3 is provided at the rear end of the support rod 2 . The bottom of the reinforcing plate 3 is connected to the base 1 , and the front side of the reinforcing plate 3 is connected to the rear side of the support rod 2 .

[0056] The groove position measuring mechanism, groove diameter measuring mechanism and wall thickness measuring mechanism described in the present invention are all existing mature equipment. For example, the groove position measuring mechanism and the groove diameter measuring mechanism both adopt the model D012C bearing measuring instrument; they will not be described in detail here.

[0057] Principle of the groove diameter measuring mechanism: Before measuring, the relative positions of the three fulcrums formed by the upper limit member, the lower limit member and the positioning member are determined. The determination method is: put a standard part of the product to be measured with a known groove diameter size for calibration in the measuring position, keep the standard part in contact with the upper hemisphere 13, the lower hemisphere 16 and the positioning block protrusion 23 at three points, first move the adjustment bracket 11 up and down preliminarily, so that the distance between the two hemispheres is as large as possible; then adjust the position of the groove diameter measuring head 10 to ensure that the probe 20 of its groove diameter measuring mechanism contacts the movable bracket 14 and has a reading, then fine-tune the adjustment bracket 11 up and down, and fix the adjustment bracket 11 when the reading of the groove diameter measuring head 10 reaches the maximum value. At this time, it can be ensured that the two hemispheres measure the real groove diameter of the standard part, that is, the distance between the two hemispheres is the groove diameter value marked by the standard part; fix the adjustment bracket 11, keep the standard part fixed in the measuring position, adjust the position of the groove diameter measuring head 10 so that its reading is 0, remove the standard part, and the adjustment of the groove diameter measuring mechanism is completed. Before the product to be tested enters the measuring position, the movable bracket 14 is first moved counterclockwise, and the probe 20 of the groove diameter measuring head 10 will also move toward the movable bracket 14. After the product is placed, the movable bracket 14 is released, and the spring 17 contracts to push the probe of the groove diameter measuring head 10. At this time, the probe 20 measures the difference between the groove diameter of the product to be tested and the known groove diameter of the standard part, which indirectly measures the groove diameter size. The position of the groove diameter measuring head 10 and its probe 20 is adjustable, and its zero position is determined by the standard part used for calibration. For some customized products to be tested, for example, the groove diameter of the product is designed to be φ64.1, the φ64 standard part is selected and placed in the measuring position during the instrument calibration, and the position of the groove diameter measuring head 10 and its probe 20 is adjusted to make its reading -0.1, which completes the calibration of the groove diameter measuring mechanism. In this way, the groove diameter of the product can be measured by the change of the probe 20 relative to the zero position.

[0058] The principle of the groove position measuring mechanism is as follows: in the initial state, the probe end of the groove position measuring meter is on the center plane of the groove, and the center plane of the groove is used as the zero position; the product 24 to be measured enters the measuring position (that is, the three fulcrums formed by the upper limit member, the lower limit member and the positioning member), ensuring that the center plane 26 of the groove of the product to be measured is positioned on the plane determined by the three fulcrums formed by the upper limit member, the lower limit member and the positioning member, and the plane is perpendicular to the probe 19 of the groove position measuring meter head 18; when the probe 19 of the groove position measuring meter head 18 contacts the outer end face of the product 24 to be measured, the groove position measuring meter head 18 measures the distance between the probe 19 and the center plane 26 of the groove, which is the groove position size.

[0059] Measuring principle of wall thickness measuring mechanism: Since the dial gauge 8 does not directly measure the wall thickness of the product 24 to be measured, what is actually observed is the range of fluctuation of the reading of the dial gauge 8 when the product rotates one circle, which is the wall thickness difference. Therefore, the method for determining the zero position of the measuring rod 9 is as follows: after the product 24 to be measured is placed in the measuring position, the measuring rod 9 of the dial gauge 8 contacts the surface of the product, and the reading of the dial gauge 8 exceeds 3 / 4 of the maximum value of the wall thickness difference required by the product design. Adjust the horizontal position of the dial gauge 8 so that the lower end of the measuring rod 9 of the dial gauge 8 is located on the center plane 26 of the channel (that is, the plane where the center line of the channel is located). After the product enters the measuring position and is positioned, release the measuring rod 9 of the dial gauge 8. The lower end of the measuring rod 9 will move downward until it fits with the outer wall of the product to be measured. The product 24 to be measured rotates one circle. As the wall thickness changes, the reading of the dial gauge 8 will change. The range of its fluctuation is read out, which is the wall thickness variation range of the product 24 to be measured, that is, the wall thickness difference.

[0060] like Figure 3 As shown, the working principle of this embodiment is described below by taking the parameter measurement of the outer ring of a deep groove ball bearing as an example. Figure 4 As shown in the present embodiment, the product 24 to be tested is an outer ring of a deep groove ball bearing, and the dimensions to be measured include the groove position dimension (i.e., the distance between the end face of the outer ring of the deep groove ball bearing and the center plane 26 of the groove), the groove diameter dimension, and the groove-outer diameter wall thickness difference.

[0061] The working principle of the utility model is:

[0062] 1. Provide the measuring device as described above: select the upper hemisphere 13 and the lower hemisphere 16 whose ball radius is 0.08-0.10mm smaller than the curvature radius of the groove of the outer ring of the deep groove ball bearing according to the curvature of the groove of the outer ring of the deep groove ball bearing, and install them on the adjusting bracket 11 and the movable bracket 14 respectively; adjust the positions of the adjusting bracket 11 and the movable bracket 14 in accordance with the standard parts of the outer ring of the deep groove ball bearing to be measured, so that the groove diameter measuring mechanism can measure the groove diameter of the standard parts, the groove position measuring mechanism can measure the groove position size of the standard parts, and the dial indicator 8 can measure the groove-outer diameter wall thickness; remove the standard parts.

[0063] 2. Install the outer ring of the deep groove ball bearing to be tested: move the movable bracket 14 to rotate the end of the movable bracket 14 connected to the lower hemisphere 16 counterclockwise, and pull up the measuring rod 9 under the dial indicator 8 to install the outer ring of the deep groove ball bearing so that the upper hemisphere 13 of the upper limit piece contacts the top of the groove of the outer ring of the deep groove ball bearing; then loosen the movable bracket 14 and the measuring rod 9 of the dial indicator 8, adjust the adjusting bracket 11, the fixed fulcrum and the movable bracket 14, and the three brackets position the outer ring of the deep groove ball bearing so that the lower hemisphere 16 of the groove diameter lower limit piece naturally fits with the bottom of the groove of the outer ring of the deep groove ball bearing, and the lower end of the measuring rod 9 of the dial indicator 8 naturally fits with the outer top of the outer ring of the deep groove ball bearing.

[0064] 3. Adjust the positions of the adjusting bracket 11 and the outer ring of the deep groove ball bearing, and observe the reading of the groove diameter measuring gauge 10. When the reading of the groove diameter measuring gauge 10 reaches the maximum value, the diameter of the outer ring of the deep groove ball bearing, that is, the groove diameter size, is measured. At this time, the adjusting bracket 11 is fixed; the probe 19 of the groove position measuring gauge 18 contacts the end face of the product and is perpendicular to the end face of the outer ring of the deep groove ball bearing, and measures the distance between the end face of the outer ring of the deep groove ball bearing to be measured and the center plane 26 of the groove, that is, the groove position size; the contact point of the measuring rod 9 of the dial indicator 8 is located on the line where the center plane 26 of the groove of the outer ring of the deep groove ball bearing intersects with the outer diameter of the outer ring of the deep groove ball bearing. After rotating the product 24 to be measured for one circle, observe the runout of the dial indicator 8 to measure the groove-outer diameter wall thickness difference.

[0065] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0066] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bearing multi-parameter measurement device, characterized in that: It includes a base, a support rod, a mounting platform, a positioning piece, a wall thickness measuring mechanism, a groove diameter measuring mechanism and a groove position measuring mechanism; The lower end of the support rod is fixed on the base, and the upper end of the support rod is provided with a mounting platform; The wall thickness measuring mechanism is arranged on the mounting platform, and the measuring rod of the wall thickness measuring mechanism passes through the mounting platform downward; One end of the positioning member is connected to the support rod; The groove diameter measuring mechanism comprises an upper limit member, a lower limit member and a groove diameter measuring gauge; The upper limit member, the lower limit member and the groove diameter measuring gauge are all mounted on the support rod, and the measuring end of the groove diameter measuring gauge contacts the outer end of the lower limit member; The inner end of the lower limit member, the inner end of the upper limit member, the center of the end of the measuring rod of the wall thickness measuring mechanism, and the center of the cantilever end of the positioning member are located in the same plane and are coplanar with the center plane of the channel of the product to be measured; The groove position measuring mechanism is installed on the support rod, and the measuring end of the groove position measuring mechanism is perpendicular to the center plane of the groove of the product to be measured; The product to be tested is installed on the upper limit piece, the lower limit piece and the positioning piece.

2. The bearing multi-parameter measuring device according to claim 1, characterized in that: The upper limit member includes an adjustment bracket, an upper plate and an upper hemisphere; the outer end of the adjustment bracket is connected to the support rod, the inner end of the adjustment bracket is connected to the upper plate, and the upper hemisphere is installed on the top of the upper plate; the center line of the upper hemisphere is located on the center plane of the channel of the product to be tested.

3. The bearing multi-parameter measuring device according to claim 2, characterized in that: The lower limit member includes a movable bracket, a lower plate body and a lower hemisphere; the movable bracket is hinged to the support rod through a pin shaft, and the inner end and the outer end of the movable bracket can rotate up and down around the pin shaft; the outer end of the movable bracket contacts the measuring end of the groove diameter measuring head, the lower plate body is installed on the inner end of the movable bracket, and the lower hemisphere is arranged at the bottom of the lower plate body; the center line of the lower hemisphere is collinear with the center line of the upper hemisphere.

4. The bearing multi-parameter measuring device according to claim 3, characterized in that: The top of the upper hemisphere and the bottom of the lower hemisphere are in contact with the center of the channel of the product to be tested.

5. The bearing multi-parameter measuring device according to claim 3, characterized in that: One end of the movable bracket close to the lower limit piece of the groove diameter is hinged to the support rod through a bracket spring.

6. The bearing multi-parameter measuring device according to claim 3, characterized in that: The positioning member includes a positioning bracket and a positioning block; the outer end of the positioning bracket is connected to the support rod, the inner end of the positioning bracket is installed with a positioning block, and a protrusion is provided on the positioning block, which extends into the channel of the product to be tested and contacts the center of the channel.

7. The bearing multi-parameter measuring device according to claim 6, characterized in that: The center line of the upper hemisphere, the center line of the lower hemisphere, and the raised center line of the positioning bracket are coplanar.

8. The bearing multi-parameter measuring device according to claim 3, characterized in that: The groove position measuring mechanism comprises a groove position measuring head, which is mounted on a support rod through a pull rod; the measuring head of the groove position measuring head is located on one side of the adjustment bracket and is perpendicular to the end face of the product to be measured.

9. The bearing multi-parameter measuring device according to claim 8, characterized in that: An arc plate is arranged at the lower end of the pull rod, and the arc plate is matched with the outer wall of the groove position measuring head; the groove position measuring head is installed at the lower end of the pull rod through the arc plate.

10. The bearing multi-parameter measurement device according to claim 3, characterized in that: The wall thickness measuring mechanism comprises a dial indicator and a measuring rod connected to the dial indicator, and the axis of the lower end of the measuring rod is colinear with the center line of the upper hemisphere.

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