A bore chamfer depth ratio and axial play measuring device

Abstract

The application discloses a kind of inner hole chamfer depth comparison and axial play measuring equipment, including shell, workbench plate and measuring table, beam and limit beam are equipped in shell, workbench plate top is equipped with stand, stand top is equipped with down pressure piece, transmission plate is installed on limit beam, transmission plate and the probe of measuring table are resisted, beam is engaged with conducting element, conducting element bottom and transmission plate are resisted, the inner ring and outer ring of bearing are pressed by down pressure piece in the application, bearing is quickly placed in measuring state, then the conducting element that is resisted with bearing inner ring is used to transmit measuring data for measuring table, not only can directly measure the axial play of bearing, but also can be compared by flipping bearing and fast clamping again bearing inner ring chamfer depth, so that axial play measurement and inner ring chamfer depth comparison can be completed in one equipment, process, not only can reduce equipment investment, but also can reduce calibration process, when responding to batch calibration, it can be more convenient.

Description

Technical Field

[0001] This invention relates to the field of measurement and comparison equipment, specifically a device for comparing the chamfer depth of an inner hole and measuring axial clearance. Background Technology

[0002] A bearing is a machined part consisting of an outer ring A, an inner ring B, rolling elements C, a rolling element retainer, seals (dust covers), and spring rings. As an important component in mechanical equipment, bearings require the measurement of various technical parameters, such as angular clearance, radial clearance, axial clearance, and inner ring B chamfer, to ensure their quality.

[0003] The axial clearance between the outer ring A, inner ring B, and intermediate rolling element C of the bearing directly affects the mechanical product's vibration, shaft runout, and rotational flexibility. The inner ring B of the bearing has a rounded chamfer, and its depth is determined by the principle of interchangeability. If the chamfer depths at both ends of the inner ring B are different, it will directly affect whether the bearing can be installed properly when the positive and negative sides are replaced on the shaft shoulder.

[0004] In the existing technology, the detection of axial clearance data and the comparison of the chamfer depth at both ends are usually divided into two equipment and two processes. Moreover, the measurement or comparison of the chamfer depth of the bearing is mostly done manually, which is not only complicated and cumbersome, but also particularly inconvenient when dealing with batch calibration. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides an internal hole chamfer depth comparison and axial clearance measurement device, comprising a housing with an open area at the top, a worktable mounted on the open area, and a measuring instrument detachably fixed to the side of the housing. The worktable has an operating hole, and the housing contains a crossbeam and a limiting beam arranged sequentially from top to bottom. The top of the worktable has a stand, and the top of the stand has a pressing member pointing towards the operating hole.

[0006] In order to make contact with the object being measured, i.e., the bearing, a vertical through hole is provided on the crossbeam, and a conductive element is engaged in the through hole. The conductive element corresponds to the operating hole on the worktable. At the same time, in order to transmit the movement of the conductive element after contacting the object being measured to the measuring instrument, a transmission plate is installed above the limiting beam via a rotating shaft. The portions of the transmission plate at both ends of the rotating shaft are located above and to the side of the limiting beam, respectively. The portion of the transmission plate located to the side abuts against the measuring stylus provided on the measuring instrument. A spring is provided between the portion of the transmission plate located above and the limiting beam. The bottom end of the conductive element abuts against the portion of the transmission plate located above.

[0007] Furthermore, the transmission component includes an adjusting rod and a flange shaft. The adjusting rod is detachably fixed to the top of the flange shaft. The top edge of the flange shaft is inclined downward. The bottom end of the flange shaft is provided with a transmission rod that abuts against the upper part of the transmission plate. The transmission rod is engaged in the through hole of the crossbeam.

[0008] The adjusting rod has a contact head at its top for contacting the workpiece. The axial clearance data is obtained by pressing the inner ring of the bearing against the contact head and measuring the difference between the downward pressing and upward pushing of the inner ring. In order to compare the chamfer depth of the front and back sides, the edge of the top of the contact head is rounded or beveled while ensuring that the contact head can measure the axial clearance.

[0009] Meanwhile, the lower pressure component includes an inner pressure rod nested at the top of the upright and an outer pressure tube nested on the pressure rod below the upright. A spring is nested between the top of the outer pressure tube and the upright. Lifting pins are provided on both sides of the inner pressure rod, and a spring is provided between the lifting pins and the inner wall of the outer pressure tube.

[0010] Preferably, the housing has a threaded hole on its side, an adjusting pin is provided in the threaded hole, the adjusting pin has a threaded section in the middle to engage with the threaded hole, and the front end of the adjusting pin has a conical head that abuts against the inclined surface of the flange shaft.

[0011] Preferably, the top of the inner pressure rod is provided with a pulling part above the upright frame to facilitate lifting operations.

[0012] Preferably, the top of the worktable is fixed with a positioning plate for aligning the workpiece position by bolts, which helps the workpiece to align with the center position of the operating hole, the transmission component and the pressing component.

[0013] Preferably, an auxiliary elastic element is provided between the upper part of the transmission plate and the limiting beam or the inner wall of the housing. The auxiliary elastic element can be a spring or a sheet. The return accuracy of the transmission plate and the transmission component is ensured by the double elastic element.

[0014] Beneficial effects

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention uses the inner pressure rod and outer pressure tube of the pressing component to press the inner and outer rings of the bearing respectively, quickly placing the bearing in the measurement state. Then, the transmission component that abuts against the inner ring of the bearing is used to transmit the measurement data to the measuring instrument. It can not only directly measure the axial clearance of the bearing, but also compare the chamfer depth of the bearing inner ring by flipping the bearing and quickly clamping it again. This allows the axial clearance measurement and inner ring chamfer depth comparison operations to be completed on one piece of equipment and in one process, which can not only reduce equipment investment, but also reduce calibration steps, making it more convenient to deal with batch calibration. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the comparison device of the present invention.

[0018] Figure 2 A front view of the connection between the transmission element and the adjusting pin.

[0019] Figure 3 This is an exploded view of the conductive component.

[0020] Figure 4 This is a three-dimensional schematic diagram showing the engagement of the pressing component and the transmission component above and below the worktable, respectively.

[0021] Figure 5 This is a 3D schematic diagram of the positioning plate on the workbench.

[0022] Figure 6 This is a front view of the bearing axial clearance test according to the present invention.

[0023] Figure 7 This is an exploded view of the structure of the comparison device of the present invention.

[0024] In the diagram: 1. Shell; 1a. Workbench; 1b. Crossbeam; 1c. Limiting beam; 1d. Positioning plate;

[0025] 2. Measuring gauge; 2a. Measuring needle;

[0026] 3. Transmission component; 3a. Adjusting rod; 3b. Flange shaft; 3c. Transmission rod; 3d. Contact head;

[0027] 4. Transmission plate; 5. Spring; 6. Auxiliary elastic components;

[0028] 7. Adjusting pin; 7a. Cone head; 7b. Threaded section;

[0029] 8. Upright frame; 9. Lower pressure component; 9a. Inner pressure rod; 9b. Outer pressure tube; 9c. Lifting pin; 9d. Pulling part;

[0030] A. Outer ring; B. Inner ring; C. Rolling element. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the preferred embodiments of this invention are further described below in conjunction with specific implementation methods and accompanying drawings.

[0032] Example 1

[0033] like Figures 1-7As shown, this invention provides an internal hole chamfer depth comparison and axial clearance measurement device. The structure includes a housing 1 with an open area at the top, a worktable 1a mounted in the open area, and a measuring gauge 2 detachably fixed to the side of the housing 1. The worktable 1a has an operating hole. Inside the housing 1, a crossbeam 1b and a limiting beam 1c are arranged sequentially from top to bottom. A support 8 is located at the top of the worktable 1a, and a pressing member 9 pointing towards the operating hole is located at the top of the support 8. To allow the bearing to align more quickly with the center positions of the operating hole, the conductive member 3, and the pressing member 9 on the worktable 1a, a positioning plate 1d for aligning the workpiece is fixed to the top of the worktable 1a by bolts. Specifically, as shown... Figure 5 As shown.

[0034] As those skilled in the art will know, in order to properly install the components inside housing 1, such as Figure 1 , Figure 7 As shown, the side of the housing 1 can be made open, and then closed by a cover plate.

[0035] As is well known, the chamfer of the inner ring B of the bearing is formed by milling with a fixed arc-shaped cutting tool. Therefore, the radius of the chamfer is the same. The difference in chamfer parameters on both sides of the inner ring B is mainly due to the difference in chamfer depth. The two ends of the chamfer are divided into inner edge and outer edge. The inner edge is the junction of the chamfer and the inner wall of the inner ring B, and the outer edge is the junction of the chamfer and the bottom plane of the inner ring B. The chamfer depth is the vertical distance from the inner edge to the bottom plane of the inner ring B.

[0036] It should be noted that, in this embodiment, the purpose of the operating hole is to allow the inner ring B of the bearing to move axially, and also to allow the conductive element 3 to move and contact the inner ring B. Therefore, the diameter of the operating hole is set according to the actual needs of the user, as long as it can support the outer ring A of the bearing and allow the inner ring B to move.

[0037] Among them, such as Figures 1-4 As shown, in order to contact the object being measured, i.e. the bearing, a vertical through hole is provided on the crossbeam 1b and a conductor 3 is engaged in the through hole. The conductor 3 corresponds to the operating hole on the worktable 1a. At the same time, in order to transmit the movement of the conductor 3 after contacting the object being measured to the measuring instrument 2, a transmission plate 4 is installed above the limiting beam 1c via a rotating shaft. The portions of the transmission plate 4 at both ends of the rotating shaft are located above and to the side of the limiting beam 1c, respectively. The bottom end of the conductor 3 abuts against the portion of the transmission plate 4 located above, and the portion of the transmission plate 4 located to the side abuts against the measuring needle 2a provided on the measuring instrument 2.

[0038] It should be noted that the transmission plate 4 is used as an intermediary between the transmission component 3 and the measuring instrument 2, not only to facilitate the observation of the measuring instrument 2, but also to use the spring 5 to provide sufficient elasticity to ensure that the transmission component 3 rebounds, and to ensure that there is enough elasticity to push the inner ring B of the bearing up. If the measuring needle 2a of the measuring instrument 2 is used to push upward, the return accuracy will be insufficient due to insufficient upward force.

[0039] Furthermore, such as Figure 1 As shown, in order to ensure that the transmission component 3 can return to its original position after the bearing is removed, a spring 5 is provided between the upper part of the transmission plate 4 and the limiting beam 1c. Preferably, an auxiliary elastic component 6 is also provided between the upper part of the transmission plate 4 and the limiting beam 1c or the inner wall of the housing 1. The auxiliary elastic component 6 can be a spring 5 or a spring sheet. The return accuracy of the transmission plate 4 and the transmission component 3 is ensured by the double elastic component.

[0040] At the same time, such as Figure 2 , Figure 3 , Figure 6 As shown, the top of the adjusting rod 3a is provided with a contact head 3d for contacting the workpiece. The inner ring B of the bearing is pressed against the contact head 3d, and the axial clearance data is obtained from the difference between the downward pressing and upward pushing of the inner ring B. In order to compare the chamfer depth of the front and back sides, the top edge of the contact head 3d is rounded or chamfered while ensuring that the contact head 3d can measure the axial clearance.

[0041] It should be noted that when the radius of the fillet of the contact head 3d is equal to the radius of the contact head 3d, the top of the contact head 3d is hemispherical.

[0042] Furthermore, such as Figures 1-4 As shown, the transmission component 3 includes an adjusting rod 3a and a flange shaft 3b. The adjusting rod 3a is detachably fixed to the top of the flange shaft 3b. The top edge of the flange shaft 3b is inclined downward. The bottom end of the flange shaft 3b is provided with a transmission rod 3c that abuts against the upper part of the transmission plate 4. The transmission rod 3c is engaged in the through hole of the crossbeam 1b.

[0043] At the same time, such as Figure 1 , Figure 2 , Figure 4 As shown, in order to ensure that the conductor 3 is in a suitable working position and to prevent the conductor 3 from being pushed too high, a threaded hole is provided on the side end of the housing 1. An adjusting pin 7 is provided in the threaded hole. The adjusting pin 7 has a threaded section 7b in the middle to engage with the threaded hole. The front end of the adjusting pin 7 has a conical cone 7a that abuts against the inclined surface of the flange shaft 3b.

[0044] Furthermore, such as Figure 4 , Figure 6As shown, the lower pressure member 9 includes an inner pressure rod 9a nested at the top of the stand 8 and an outer pressure tube 9b nested on the pressure rod below the stand 8. A spring 5 is nested between the top of the outer pressure tube 9b and the stand 8. Lifting pins 9c are provided on both sides of the inner pressure rod 9a. When the inner pressure rod 9a is pulled up, the lifting pins 9c drive the outer pressure tube 9b to rise. A spring 5 is provided between the lifting pin 9c and the inner wall of the outer pressure tube 9b to provide elastic force to press the inner pressure rod 9a down. To make the lifting operation more convenient, a pulling part 9d is provided at the top of the inner pressure rod 9a above the stand 8.

[0045] In summary, this embodiment is used specifically for measuring the axial clearance of bearings:

[0046] A contact head 3d with a diameter matching that of the inner ring B of the bearing being tested must be used. Specifically, the top diameter of the chamfer or rounded corner of the edge of the contact head 3d should be smaller than the minimum diameter of the inner ring B of the bearing. When the contact head 3d contacts the chamfer of the inner ring B, the chamfer or rounded corner should abut against the chamfer of the inner ring B. In this embodiment, a contact head 3d with rounded corners is used.

[0047] Lift the inner pressure rod 9a, which, through the lifting pin 9c, drives the outer pressure tube 9b upward, opening the area on the worktable 1a. Place the bearing on the worktable 1a, aligning the bearing inner ring B with the operating hole. The positioning plate 1d can be used to position the bearing. Simultaneously, as the bearing is placed on the worktable 1a, the bearing inner ring B presses against the contact head 3d of the adjusting rod 3a. Then, lower the inner pressure rod 9a and the outer pressure tube 9b. The outer pressure tube 9b presses against the outer ring A of the bearing, while the inner pressure rod 9a presses against the inner ring B, pushing the inner ring B down to its limit. At this point, the chamfer of the inner ring B abuts against the rounded corner of the contact head 3d, causing the adjusting rod 3a, flange shaft 3b, and transmission rod 3c to move downwards. Because the transmission rod 3c abuts against the transmission plate 4, the transmission plate 4... After being subjected to force, the shaft swings to transfer the stroke transmitted by the transmission rod 3c to the probe 2a that is opposed to it, so that the reading is displayed on the measuring instrument 2. At this time, the reading is not directly used as the required data. The reading is recorded as the first boundary value. Then, the outer pressure tube 9b is pinched and the inner pressure rod 9a is lifted, so that the outer pressure tube 9b is kept pressed against the outer ring A of the bearing. At this time, the transmission plate 4 provides elastic force through the spring 5, or the spring 5 and the auxiliary elastic element 6 provide elastic force together to push the adjusting rod 3a, the flange shaft 3b and the transmission rod 3c upward. The contact head 3d pushes the inner ring B to the limit state. At this time, the reading displayed on the measuring instrument 2 is observed as the second boundary value. The value of the axial clearance of the bearing can be known by the distance between the first boundary value and the second boundary value.

[0048] Similarly, its specific application when comparing the chamfer depth of the inner ring B of a bearing:

[0049] The steps are the same as the measurement steps for the first side. After recording the first boundary value reading, lift the inner pressure rod 9a to drive the outer pressure tube 9b to rise, release the pressure on the bearing, then flip the bearing over, put down the inner pressure rod 9a and the outer pressure tube 9b and re-clamp them, so that the inner pressure rod 9a presses down on the inner ring B of the bearing to the limit state again. Then observe the reading displayed on the measuring instrument 2 to see if it is the same as the first boundary value reading. This is used to compare the chamfer depth of the inner ring B of the bearing.

[0050] This allows the axial clearance measurement of bearings and the comparison of the inner ring B chamfer depth to be completed on a single device and in a single process. This not only reduces equipment investment but also reduces calibration steps, making it more convenient to handle batch calibrations.

[0051] Example 2

[0052] Based on Embodiment 1, this embodiment provides an implementation method that can simultaneously measure the axial clearance of the bearing, measure the chamfer depth of the inner ring B, and compare the chamfer depth of the inner ring B.

[0053] As is well known, the chamfer of the inner ring B of the bearing is formed by milling with a fixed arc-shaped cutter head. Therefore, the radii of the chamfers are all the same. The chamfer parameters on both sides of the inner ring B are different mainly because the chamfer depths are different. The two ends of the chamfer are divided into the inner edge and the outer edge. The inner edge is the junction of the chamfer and the inner wall of the inner ring B. The chamfer depth is the vertical distance from the inner edge to the bottom plane of the inner ring B.

[0054] It should be noted that, in this embodiment, the purpose of the operating hole is to allow the conductive element 3 to move and contact the inner ring B. Therefore, the diameter of the operating hole should be smaller than the outer diameter of the inner ring B and larger than the diameter of the outer edge of the chamfer of the inner ring B. The outer edge is the junction of the chamfer and the bottom plane of the inner ring B.

[0055] Meanwhile, the contact head 3d used in this embodiment is rounded, and the radius of the rounded corner is equal to that of the inner circle B chamfer. Furthermore, the rounded corner of the contact head 3d is tangent to the chamfer of the inner circle B at 45°, that is, the length of the arc surface and the arc line at both ends of the tangent point are divided into two equal parts.

[0056] During installation, a flat plate is pressed onto the workbench 1a. At this time, the contact head 3d is in the operating hole and is in contact with the plate. The height of the top of the contact head 3d is the horizontal height of the top surface of the workbench 1a. The position of the measuring gauge 2 is zeroed. Then, the plate is removed, and a standard bearing, i.e., a high-precision bearing, is clamped onto the workbench 1a. The inner pressure rod 9a and the outer pressure tube 9b respectively press the inner ring B and the outer ring A of the bearing onto the workbench 1a. Then, the contact head 3d is allowed to extend out of the operating hole and contact the chamfer of the inner ring B. Since the contact head 3d is tangent to the chamfer of the inner ring B at 45°, the length of the top of the contact head 3d extending out of the workbench 1a is half of the chamfer depth. This data can be reflected in the measuring gauge 2. Record this value as X. Therefore, the standard and qualified chamfer depth is 2X.

[0057] When measuring and comparing the chamfer depth of inner circle B:

[0058] The bearing is clamped on the worktable 1a. The inner pressure rod 9a and the outer pressure tube 9b press the inner ring B and outer ring A of the bearing onto the worktable 1a, respectively. Then, the contact head 3d extends out of the operating hole and contacts the chamfer of the inner ring B. At this time, observe the measuring gauge 2.

[0059] If the reading on the gauge increases, it means that the contact point where the chamfer is tangent to the contact head 3d is lower, which is necessary to press the probe 2a to increase the reading. Therefore, the depth of the chamfer is shallower than that of the standard part. Record this value as Y. Thus, the chamfer depth is |2X|-|YX|, where |2X| and |YX| are the absolute values ​​of 2X and YX, respectively. The absolute value of YX is the distance between the "tangent part of the chamfer and contact head 3d" of the tested bearing and the "tangent part of the chamfer and contact head 3d" of the standard bearing, which also represents how much the chamfer has become shallower outward.

[0060] Similarly, if the reading on the gauge decreases, it means that the contact position where the chamfer is tangent to the contact head 3d is higher. This reduces the pressure on the probe 2a, causing the reading to decrease. Therefore, the depth of the chamfer is deeper than that of the standard part. Record this value as Z. Thus, the chamfer depth is |2X|+|XZ|. The principle of YX is the same as above, representing how much the chamfer has deepened inward.

[0061] As shown above, after measuring the chamfer depth of the inner circle B, a chamfer depth comparison can naturally be made.

[0062] Based on the above steps, when measuring the axial clearance of the bearing:

[0063] Pinch the external pressure tube 9b and lift the internal pressure rod 9a, keeping the external pressure tube 9b pressed against the outer ring A of the bearing. At this time, the transmission plate 4 provides elastic force through the spring 5, or the spring 5 and the auxiliary elastic element 6 together provide elastic force to push the adjusting rod 3a, the flange shaft 3b and the transmission rod 3c upward. The contact head 3d pushes the inner ring B to its limit. Observe the reading displayed on the measuring instrument 2 at this time and record it as D1. Then flip the bearing, pinch the external pressure tube 9b again and lift the internal pressure rod 9a. Observe the reading displayed on the measuring instrument 2 at this time and record it as D2. The value of the axial clearance is |D1-X|+|D2-X|, where |D1-X| and |D2-X| represent the absolute values ​​of D1-X and D2-X respectively, and D1-X and D2-X represent the distance the inner ring moves upward. The sum of the two moving distances is the value of the axial clearance.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for comparing the chamfer depth of an inner hole and measuring axial clearance, characterized in that: It includes a shell with an open area at the top, a worktable installed in the open area, and a measuring instrument that can be detachably fixed to the side of the shell. The worktable has an operating hole, and a crossbeam and a limiting beam are arranged in sequence from top to bottom inside the shell. The top of the workbench is provided with a support frame, and the top of the support frame is provided with a pressing member pointing towards the operation hole; A transmission plate is mounted on the upper part of the limiting beam via a rotating shaft. The portions of the transmission plate at both ends of the rotating shaft are located above and to the side of the limiting beam, respectively. The portion of the transmission plate located to the side abuts against the probe of the measuring instrument. A spring is provided between the portion of the transmission plate located above and the limiting beam. The crossbeam has vertical through holes and a transmission component is engaged in the through holes. The transmission component corresponds to the operating hole on the workbench, and the bottom end of the transmission component abuts against the upper part of the transmission plate. The lower pressure component includes an inner pressure rod nested at the top of the upright and an outer pressure tube nested on the pressure rod below the upright, with a spring nested between the top of the outer pressure tube and the upright; The transmission component includes an adjusting rod and a flange shaft. The adjusting rod is detachably fixed to the top of the flange shaft. The top edge of the flange shaft is inclined downward. The bottom end of the flange shaft is provided with a transmission rod that abuts against the upper part of the transmission plate. The transmission rod is engaged in the through hole of the crossbeam. The top of the adjusting rod is provided with a contact head for contacting the workpiece, and the top edge of the contact head is rounded or beveled. An auxiliary elastic element is also provided between the upper part of the transmission plate and the limiting beam or the inner wall of the housing.

2. The device for comparing the chamfer depth of an inner hole and measuring axial clearance according to claim 1, characterized in that: The housing has a threaded hole on its side, and an adjusting pin is provided in the threaded hole. The adjusting pin has a threaded section in the middle to engage with the threaded hole, and the front end of the adjusting pin has a conical head that abuts against the inclined surface of the flange shaft.

3. The device for comparing the chamfer depth of an inner hole and measuring axial clearance according to claim 1, characterized in that: The inner pressure rod is provided with lifting pins on both sides, and a spring is provided between the lifting pins and the inner wall of the outer pressure tube.

4. The device for comparing the chamfer depth of an inner hole and measuring axial clearance according to claim 3, characterized in that: The external pressure pipe is provided with a vertical drive groove at the position corresponding to the lifting pin, and the distance from the lifting pin to the bottom of the internal pressure rod is less than the distance from the top of the drive groove to the bottom of the external pressure pipe.

5. The device for comparing the chamfer depth of an inner hole and measuring axial clearance according to claim 3, characterized in that: The top of the internal pressure rod is provided with a pulling part above the upright.

6. The device for comparing the chamfer depth of an inner hole and measuring axial clearance according to claim 1, characterized in that: The top of the workbench is fixed with a positioning plate for aligning the workpiece.

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