Measuring device and measuring method

Abstract

The application discloses a measuring device and a measuring method. The measuring device comprises a platform, a positioning device arranged on the platform and used for supporting and horizontally positioning a slewing bearing, and a detection device arranged on the platform and used for measuring a double-race center distance of the slewing bearing and relative axial runout of adjacent races, wherein the detection device is provided with a double-floating structure capable of compensating axial error and radial error of the slewing bearing. The application can ensure stability of a detection process when the slewing bearing is measured, eliminate possible accidental error of the slewing bearing in the detection process, and make the detected data have repeatability and reproducibility.

Description

Technical Field

[0001] This invention relates to the field of measuring instrument design and manufacturing technology, and in particular to a measuring device and a measuring method, which can accurately measure the center distance between the two raceways of a slewing bearing and the relative axial runout of adjacent raceways. Background Technology

[0002] Double-row ball slewing bearings are widely used in products from various fields such as cranes, excavators, pump trucks, and wind power, to achieve rotation and support between different mechanical structures.

[0003] Double-row ball slewing bearings, also known as slewing bearings with double rows of raceways, have an axial center distance between their two raceways, which is called the double raceway center distance. The change in the double raceway center distance at different positions is called the relative axial runout. These two parameters are important parameters in the design and manufacturing process of high-precision double-row ball slewing bearings. This indicator has a significant impact on the load distribution of the product under actual working conditions, and further affects the product's performance and service life.

[0004] Currently, most slewing bearing manufacturers use simple rulers for random measurements to test the center distance of the double raceways. This method cannot guarantee the stability of the reference, nor can it avoid the influence of raceway position errors, ovality, and human error in the slewing bearing itself. These methods for testing the center distance of the double raceways all have varying degrees of error, and the data obtained is difficult to reproduce stably, meaning that the data is not repeatable or reproducible. Furthermore, there are basically no means to test the runout tolerance.

[0005] The difficulty in detecting these two parameters has also led to a certain degree of blindness in processing. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a measuring device and a measuring method that can ensure the stability of the detection process when measuring the center distance between the two raceways and the relative axial runout of adjacent raceways of a slewing bearing, eliminate possible random errors in the detection process of the slewing bearing, and make the detected data repeatable and reproducible.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A measuring device, comprising:

[0009] platform;

[0010] A positioning device is provided on the platform for supporting the slewing bearing and positioning the slewing bearing horizontally.

[0011] A detection device, installed on the platform, is used to measure the center distance between the two raceways and the relative axial runout of adjacent raceways of the slewing bearing. The detection device is equipped with a double floating structure that can compensate for the axial and radial errors of the slewing bearing.

[0012] Optionally, in the above-mentioned measuring device, multiple positioning devices are provided, and during the detection process, the multiple positioning devices are arranged sequentially along the circumference of the slewing bearing.

[0013] Each of the positioning devices includes:

[0014] The support portion is used to support the slewing bearing component;

[0015] A limiting part, located above the support part, is used to abut against the slewing bearing to limit the slewing bearing in the radial direction.

[0016] Optionally, in the above-described measuring device, the positioning device is slidably mounted on the platform.

[0017] Optionally, in the above-described measuring apparatus, the detection device includes:

[0018] Base;

[0019] The first sliding member is connected to the base;

[0020] The first probe is mounted on one side of the first sliding member via the third mounting base, and is used to contact the first raceway of the slewing bearing member;

[0021] The second probe is slidably mounted on one side of the first sliding member via the second sliding member, and is used to contact the second raceway of the slewing bearing member;

[0022] A measuring device is installed on one side of the first sliding member and is used to measure the moving distance of the second probe relative to the first probe.

[0023] Optionally, in the above measuring device, the base is provided with an axial floating structure, the axial floating structure including a guide connection and a first elastic connector;

[0024] The first sliding member is slidably connected to the guide connection part and elastically connected to the base through the first elastic connection part. The first sliding member can reciprocate relative to the guide connection part along a first linear direction, which is parallel to the axial direction of the slewing support member.

[0025] Optionally, in the above measuring device, the second sliding member is slidably connected to the first sliding member and can reciprocate relative to the first sliding member along a second linear direction, the second linear direction being parallel to the axial direction of the slewing bearing member;

[0026] The second probe is mounted on the second sliding member;

[0027] The measuring end of the measuring device abuts against the second sliding member and is used to measure the amount of movement of the second sliding member relative to the first sliding member.

[0028] Optionally, the above-mentioned measuring device further includes:

[0029] The first mounting base is detachably connected to the first sliding member;

[0030] The second elastic connector is located between the first mounting base and the second sliding member.

[0031] Optionally, the above-mentioned measuring device also includes a second mounting base;

[0032] The second mounting base is detachably connected to the first sliding member;

[0033] The metering device is mounted on the second mounting base.

[0034] Optionally, in the above-described measuring device, the third mounting base is detachably connected to the first sliding member;

[0035] The first probe is mounted on the third mounting base, and a first elastic element is provided between the first probe and the third mounting base to form a first radial floating structure, so that the first probe and the slewing bearing are in elastic contact.

[0036] Optionally, in the above-mentioned measuring device, a second elastic element is provided between the second probe and the second sliding member to form a second radial floating structure, so that the second probe and the slewing bearing member are in elastic contact.

[0037] Optionally, in the above-mentioned measuring device, the platform is provided with an adjustable pad, and the detection device is mounted on the adjustable pad, so that the overall height of the detection device can be adjusted by the adjustable pad.

[0038] Optionally, in the above-described measuring device, the detection device is fixed to the adjustable pad by magnetic adsorption.

[0039] A measurement method comprising measuring the center distance between the two raceways and the relative axial runout of adjacent raceways of a slewing bearing using the measuring device described above, the measurement method comprising:

[0040] The slewing bearing to be measured is placed on the positioning device of the measuring device, and the detection device in the measuring device is aligned with the standard sample block.

[0041] Place the detection device on the platform and adjust the height of the first probe of the detection device located below so that it fits with the first raceway of the slewing bearing located below.

[0042] Rotate the slewing bearing and use the detection device to measure the center distance between the two raceways and the relative axial runout of the adjacent raceways.

[0043] As can be seen from the above technical solutions, the measuring device and measuring method provided by the present invention, through the platform and positioning device, combined with the double floating structure of the detection device, can ensure the stability of the detection process when measuring the center distance of the double raceways and the relative axial runout of adjacent raceways of the slewing bearing, eliminate possible random errors of the slewing bearing during the detection process, and make the detected data repeatable and reproducible. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 An overall structural diagram of the measuring device provided in this embodiment of the invention when measuring a slewing bearing;

[0046] Figure 2 for Figure 1 A magnified view of a local area in the image;

[0047] Figure 3 This is a diagram of the platform structure in the measuring device provided in an embodiment of the present invention;

[0048] Figure 4 This is a cross-sectional view of the positioning device in the measuring apparatus provided in an embodiment of the present invention;

[0049] Figure 5 This is an overall structural diagram of the detection device in the measuring apparatus provided in the embodiments of the present invention;

[0050] Figure 6 for Figure 5 A cross-sectional view of the dashed area I in the diagram.

[0051] in:

[0052] 1-Platform, 2-Positioning device, 3-Slide plate, 4-Detection device, 5-Adjustable pad, 6-Slewing bearing component

[0053] 401-First sliding component, 402-Measuring device, 403-Second mounting base, 404-T-shaped component,

[0054] 405 - Second probe, 406 - Cover plate, 407 - Second connector, 408 - Second sliding member

[0055] 409 - Second flexible connector, 410 - First mounting base, 411 - Floating shaft, 412 - Knob

[0056] 413 - First elastic connector, 414 - Base, 415 - Guide connector

[0057] 416 - First probe, 417 - First connector, 418 - Third mounting base, 419 - Second elastic element.

[0058] 501 - Bolt, 502 - First pad unit, 503 - Second pad unit. Detailed Implementation

[0059] This invention discloses a measuring device and a measuring method. By using a platform and a positioning device, the stability of the detection process can be ensured when measuring the center distance between the two raceways and the relative axial runout of adjacent raceways of a slewing bearing. This eliminates possible random errors in the detection process of the slewing bearing and makes the detected data repeatable and reproducible.

[0060] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0061] Please see Figures 1 to 6 The measuring device provided in this embodiment of the invention includes a platform 1, a positioning device 2, and a detection device 4. The positioning device 2 is mounted on the platform 1 and is used to support the slewing bearing 6 and perform horizontal positioning on the slewing bearing 6. The detection device 4 is mounted on the platform 1 and is used to measure the center distance between the two raceways of the slewing bearing 6 and the relative axial runout between adjacent raceways. The detection device 4 is equipped with a double floating structure capable of compensating for the axial and radial errors of the slewing bearing 6.

[0062] In this testing device, the platform and positioning device can limit the movement of the slewing bearing 6 during measurement, eliminating positioning errors and ensuring the stability of the testing process. Furthermore, the testing device 4 has a double floating structure, which can eliminate errors caused by factors such as the ellipticity of the raceway and positional errors of the slewing bearing. Therefore, the double floating structure of the platform, positioning device, and testing device 4 in this testing device can eliminate possible random errors in the slewing bearing during testing, ensuring the repeatability and reproducibility of the tested data.

[0063] For specific implementation details, please refer to [link / reference]. Figures 1 to 3 Platform 1 is equipped with multiple positioning devices 2, which are arranged sequentially along the circumference of the slewing bearing 6 during the testing process. Specifically, each positioning device 2 is provided with a support part 202 and a limiting part 201: the support part 202 is used to support the slewing bearing 6; the limiting part 201 is located above the support part 202 and is used to abut against the slewing bearing 6 to horizontally limit the slewing bearing 6 in the radial direction.

[0064] During the testing process, such as Figure 1 As shown, the support portions 202 of the multiple positioning devices 2 are all located below the slewing bearing 6, and the limiting portions 201 of the multiple positioning devices 2 surround and abut against the outer periphery of the slewing bearing 6, thereby radially limiting the slewing bearing 6. At this time, the slewing bearing 6 can rotate about the central axis on the platform 1, but remains stable in both the horizontal and vertical directions, thus ensuring the stability of the detection process.

[0065] In a preferred embodiment, at least part of the positioning device 2 is slidably disposed on the platform 1 to accommodate the testing requirements of slewing bearings 6 of different sizes.

[0066] In a preferred embodiment, the limiting part 201 of the positioning device 2 is a cylindrical structure, and the supporting part 202 is a disc structure, which are coaxially and fixedly connected. Furthermore, the central axis of the limiting part 201 is parallel to the central axis of the slewing bearing 6. When the slewing bearing 6 is rotated, the positioning device 2 can rotate with it, making operation convenient.

[0067] For specific implementation details, please refer to [link / reference]. Figures 1 to 4 Each positioning device 2 is provided with an integral rotating component, which is provided with the aforementioned limiting part 201 and support part 202. The bottom connecting shaft 203 of the rotating component is fitted with a bearing 204 and a bearing seat 206, and the bearing seat 206 is fixedly installed on the slide plate 3. The platform 1 is provided with a groove that slides with the slide plate 3.

[0068] As can be seen, since the positioning device 2 can rotate around its own axis via the bearing 204, it is possible to easily detect the rotation of the slewing bearing 6 on the platform 1. Moreover, through the grooves on the platform 1 and the sliding plate 3 below the positioning device 2, the specific position of each positioning device 2 on the platform 1 can be adjusted to make it closer to / away from the slewing bearing 6. This not only enables the horizontal positioning of the slewing bearing 6, but also adapts to the detection requirements of slewing bearings 6 of different sizes.

[0069] Preferably, such as Figure 4 As shown, two bearings 204 are arranged side-by-side outside the bottom connecting shaft 203 of the positioning device 2, and the two bearings 204 are axially limited by a bushing 205. The bottom connecting shaft 203 has a shoulder, and the inner ring of the upper bearing 204 abuts against this shoulder. The bearing seat 206 has a stepped hole, and both bearings 204 and the bushing 205 are located within this stepped hole. The outer ring of the lower bearing 204 abuts against the inner stepped surface of the stepped hole. In this structure, because two bearings 204 are arranged side-by-side outside the bottom connecting shaft 203 of the positioning device 2, it helps to ensure that the support part 202 and the limiting part 201 can rotate around the vertical central axis without wobbling, which helps to ensure the positional stability of the slewing bearing 6 during rotation and prevents horizontal or vertical displacement of the slewing bearing 6 during rotation. However, it is not limited to this. In other specific embodiments, the positioning device can also be designed in other structural forms, as long as it can achieve the above-mentioned support and positioning functions. For example, the positioning unit can be designed as a tray structure that can slide along the platform groove, and the center of the tray structure is equipped with a central shaft through a bearing.

[0070] Specifically, please see Figure 2 and Figure 5 The detection device 4 mainly includes a base 414, a first sliding member 401, a first probe 416, a second probe 405, and a measuring device 402. Specifically: the first sliding member 401 is connected to the base 414; the first probe 416 is mounted on one side of the first sliding member 401 via a third mounting base 418, for contacting the first raceway of the slewing bearing 6; the second probe 405 is slidably mounted on one side of the first sliding member 401 via a second sliding member 408, for contacting the second raceway of the slewing bearing 6; and the measuring device 402 is mounted on one side of the first sliding member 401 for measuring the movement distance of the second probe 405 relative to the first probe 416.

[0071] To compensate for axial errors during measurement, the base 414 is equipped with an axial floating structure, which includes a guide connection 415 and a first elastic connector 413 (e.g., a φ8 compression spring). The first sliding member 401 is slidably connected to the guide connection 415 and elastically connected to the base 414 via the first elastic connector 413. The first sliding member 401 can move relative to the guide connection 415 along a first linear direction (i.e.,...). Figure 5 The first sliding member 401 moves back and forth in the vertical direction, and the first linear direction is parallel to the axis of the slewing support 6. Thus, the first sliding member 401 and the base 414 constitute the first vertical floating mechanism, which enables the first sliding member 401 to achieve a floating connection in the vertical direction, that is, the first sliding member 401 can move up and down in the vertical direction.

[0072] Preferably, please refer to Figure 5 A floating shaft 411 is vertically arranged on the base 414; the bottom connecting plate of the first sliding member 401 is sleeved on the floating shaft 411, and the top and bottom of the bottom connecting plate are respectively provided with first elastic connecting members 413, so that the first sliding member 401 can achieve a floating connection in the vertical direction, so that the first probe 416, the second probe 405 and the measuring device 402 float synchronously in the vertical direction.

[0073] Therefore, during the measurement process, the first probe 416 can float up / down along the guide connection 415 together with the third mounting base 418 and the first sliding member 401, eliminating the influence of the axial plane error of the lower raceway of the slewing bearing 6 (i.e., the first raceway corresponding to the position of the first probe 416) on the measurement results of the center distance between the two raceways and the relative axial runout of adjacent raceways. Moreover, when the position or level of the slewing bearing 6 in the vertical direction deviates due to human operation error or other factors, the detection device 4 can adapt to the deviation in a timely manner without affecting the measurement results of the center distance between the two raceways and the relative axial runout of adjacent raceways.

[0074] It should be noted that the bottom connecting plate of the first sliding member 401 is sleeved on the floating shaft 411, and the first elastic connecting members 413 are respectively provided above and below the bottom connecting plate of the first sliding member 401. This is to ensure the connection stability of the floating structure and avoid problems such as shaking or displacement of the first sliding member 401, while enabling the first sliding member 401 to float up and down.

[0075] For specific implementation details, please refer to [link / reference]. Figure 5 The detection device 4 is provided with a second sliding member 408. The second sliding member 408 is slidably connected to the first sliding member 401, and can move relative to the first sliding member 401 along a second linear direction (i.e., Figure 5The second sliding member 408 reciprocates in the vertical direction, and the second linear direction is parallel to the axis of the slewing support 6. Thus, the second sliding member 408 and the first sliding member 401 constitute the second vertical floating mechanism, which enables the second sliding member 408 to float in the vertical direction, that is, the second sliding member 408 can move up and down in the vertical direction.

[0076] Furthermore, the second probe 405 is disposed on the second sliding member 408; the measuring end of the measuring device 402 abuts against the second sliding member 408 and is used to measure the amount of movement of the second sliding member 408 relative to the first sliding member 401, thereby obtaining the distance change between the second probe 405 and the first probe 416, that is, the relative axial runout of the double raceway of the slewing bearing 6.

[0077] In specific implementation, the measuring device 402 can be a dial indicator, micrometer, ten-thousand-meter indicator, or other instrument capable of measuring the movement of the second sliding member 408; both the first probe 416 and the second probe 405 are spherical probes. Moreover, the size of the spherical probe can be adjusted, thereby enabling the detection system to meet different detection requirements for the center distance of the double raceways and the relative axial runout of different models of slewing bearing members 6.

[0078] Furthermore, the measuring device also includes a first mounting base 410, a second elastic connector 409, and a second mounting base 403. Specifically: the first mounting base 410 is detachably connected to the first sliding member 401, allowing the second probe 405 to be adjusted vertically; the second elastic connector 409 is located between the first mounting base 410 and the second sliding member 409; the measuring device 402 is mounted on the second mounting base 403, which is detachably connected to the first sliding member 401, allowing the measuring device 402 to be adjusted vertically.

[0079] Preferably, the second elastic connector 409 can be a φ4 compression spring. A guide shaft, or floating screw, is also fitted inside the second elastic connector 409. The bottom end of the floating screw is fixedly connected to the first mounting base 410, and the top end is slidably connected to the second sliding member 408. Alternatively, the bottom end of the floating screw is slidably connected to the first mounting base 410, and the top end is fixedly connected to the second sliding member 408.

[0080] During the testing process, the relative axial runout of adjacent raceways is generally very small, resulting in a very small vertical floating distance between the second probe 405 and the first probe 416. The first mounting base 410, the second elastic connector 409, and the second sliding member 408 ensure that the second probe 405 can float vertically relative to the first probe 416 to measure the relative axial runout of adjacent raceways, while also ensuring the stable mounting of the second probe 405 on the first sliding member 401, preventing it from easily detaching.

[0081] Specifically, please see Figure 2 and Figure 5 The first sliding member 401 is provided with a slotted hole, or groove. The second sliding member 408 can slide up and down along the slotted hole. The first mounting base 410 and the second mounting base 403 are respectively detachably mounted on one side of the first sliding member 401 by means of a T-shaped member 404. One end of the T-shaped member 404 is engaged outside the slotted hole, and the other end extends into the slotted hole and is connected to the first mounting base 410 / second mounting base 403 by a fastener (e.g., a screw).

[0082] The strip-shaped hole preferably adopts a dovetail groove structure, which can ensure the stability of the second sliding member 408 and the first mounting base 410 and the second mounting base 403 when sliding relative to the first sliding member 401.

[0083] Before measuring the slewing bearing 6, the testing device 4 can be aligned using a standard sample block. During operation, after loosening the screws on the T-shaped piece 404, the first mounting base 410 and the second mounting base 403 can respectively drive the second probe 405 and the measuring device 402 to slide up and down along the groove of the first sliding member 401. At this time, since the first mounting base 410 and the second mounting base 403 are detachably connected to the first sliding member 401 through the T-shaped piece 404, their height positions can be adjusted according to the actual situation, that is, the height positions of the second probe 405 and the measuring device 403 can be adjusted to achieve the alignment and fixation of the testing device 4.

[0084] In practical implementation, since the second probe 405 is mounted on the second sliding member 408, and the second sliding member 408 is elastically connected to the first sliding member 401 via the second elastic connector 409, when the distance between adjacent raceways of the slewing bearing 6 being measured changes, the second probe 405 slides up / down along the strip hole of the first sliding member 401 with the second sliding member 408, transmitting the motion to the measuring device 402, thereby measuring the vertical floating distance of the second probe 405, that is, the relative axial runout distance between the second raceway and the first raceway of the slewing bearing 6. Combined with the initial distance between the first probe 416 and the second probe 405 before measurement (i.e., the standard center distance marked by the standard sample block), the actual measured center distance of the double raceways can be obtained at this time.

[0085] It should be noted that the average value of the vertical change of the measuring device 402 after one revolution of the slewing bearing 6 is the final measured center distance of the double raceways. The maximum value minus the minimum value is the relative axial runout value of the double raceways.

[0086] In a preferred embodiment, in order to compensate for the radial error of the slewing bearing 6, the first probe 416 is mounted on one side of the first slider 401 through the first elastic component, and the first probe 416 and the first raceway of the slewing bearing 6 are in elastic contact; the second probe 405 is mounted on one side of the first slider 401 through the second slider 408 and the second elastic component, and the second probe 405 and the second raceway of the slewing bearing 6 are in elastic contact.

[0087] Specifically, please see Figure 5 and Figure 6 The third mounting base 418 is detachably connected to the first sliding member 401. The first probe 416 is mounted on the third mounting base 418 and a first elastic member (e.g., a φ6 compression spring) is provided between the probe 416 and the third mounting base 418 to form a first radial floating structure, so that the first probe 416 and the slewing support member 6 are in elastic contact. Moreover, a second elastic member 419 (e.g., a φ6 compression spring) is provided between the second probe 405 and the second sliding member 408 to form a second radial floating structure, so that the second probe 405 and the slewing support member 6 are in elastic contact.

[0088] Furthermore, the detection device 4 also includes a first connecting member 417. Specifically: the third mounting base 418 has a first sliding groove; one end of the first connecting member 417 is connected to the first probe 416, and the other end extends into the first sliding groove; a first elastic member is located within the first sliding groove and abuts against the first connecting member 417. The first connecting member 417 and the first probe 416 can be component structures or different parts of an integral part structure.

[0089] Furthermore, the detection device 4 also includes a second connecting member. Specifically: the second sliding member 408 has a second sliding groove; one end of the second connecting member 407 is connected to the second probe 405, and the other end extends into the second sliding groove; the second elastic member 419 is located within the second sliding groove and abuts against the second connecting member 407. The second connecting member 407 and the second probe 405 can be a component structure or different parts of an integral part structure.

[0090] As can be seen, in this measuring device, not only is the first probe 416 connected to the third mounting base 418 via the first connecting member 417, but the first elastic member also enables the first probe 416 to float in the horizontal direction. Simultaneously, the first cover plate 420 limits the first connecting member 417 and the connected first probe 416. Similarly, the second probe 416 is connected to the second sliding member 407 via the second connecting member 407, and the second elastic member 419 enables the second probe 4076 to float in the horizontal direction. The second cover plate 406 limits the second connecting member 407 and the connected second probe 416. Thus, the first probe 416 and the second probe 405 are respectively floated in the horizontal direction via elastic members, thereby compensating for and eliminating the radial error of the slewing bearing 6 during measurement, avoiding the influence of the raceway position error and ellipticity error of the slewing bearing 6 itself.

[0091] In practice, the platform 1 is equipped with an adjustable pad 5, and the detection device 4 is mounted on the adjustable pad 5. The overall height of the detection device 4 can be adjusted by the adjustable pad 5.

[0092] For example, see Figure 2 The adjustable pad 5 includes a first pad unit 502, a second pad unit 503, and a bolt 501. The first pad unit 502 is positioned above the second pad unit 503, and the contact surface between the two is an inclined plane that is relatively inclined to the vertical plane. By tightening / loosening the bolt 501, the first pad unit 502 can be moved up / down along the inclined plane, thereby raising / lowering the detection device 4 connected to the first pad unit 502, especially the first probe 416, to adapt to the actual height position of the slewing bearing 6 to be tested.

[0093] Specifically, the detection device 4 can be fixed to the adjustable pad 5 by magnetic adsorption. Preferably, the upper surface of the adjustable pad 5 is provided with a horizontal limiting groove for mounting the detection device 4. However, it is not limited to this. In other specific embodiments, other methods can be used to fix the detection device 4 to the platform 1, such as snap-fit ​​connection, rivet fastening, etc. The present invention does not specifically limit this.

[0094] Furthermore, the platform 1 is provided with a groove, such as a T-groove, and the adjustable pad 5 can slide horizontally on the platform 1 in conjunction with the T-shaped part, so that the detection device 4 can adapt to slewing bearings 6 of different sizes.

[0095] This invention also provides a measurement method that uses the measuring device described above to measure the center distance between the two raceways of the slewing bearing 6 and the relative axial runout of adjacent raceways.

[0096] Specifically, the measurement method includes:

[0097] The measuring device 4 in the measuring apparatus is adjusted and calibrated using a standard sample block; ("standard sample block" is a slewing bearing section with standard raceway curvature, contact angle, and known center distance, which can be measured by high-precision instruments such as a Taylor meter or a coordinate measuring machine; "calibration" refers to adjusting the horizontal height of the two probes in the measuring device 4 so that they are aligned with the two raceways of the standard part. At this time, the measurement value of the measuring device 402 in the measuring device 4 is zero.)

[0098] Place the slewing bearing 6 to be measured on the positioning device 2;

[0099] Place the detection device 4 on the adjustable pad 5 of the platform 1, and adjust the adjustable pad 5 and the detection device 4 so that the height of the first probe 416 of the detection device 4 below is in contact with the first raceway of the slewing bearing 6 to be measured below, and is basically at the same horizontal height.

[0100] Rotate the slewing bearing 6, and use the detection device 4 to measure the center distance between the two raceways and the relative axial runout of the adjacent raceways of the slewing bearing 6.

[0101] In practice, after aligning with the standard parts, the testing device 4 is placed on the adjustable pad 5 via the magnetic base 414, and the first probe 416 and the second probe 405 of the testing device 4 are placed in the two raceways of the slewing bearing 6. The slewing bearing 6 is placed on the positioning device 2, and the slewing bearing 6 is manually pushed to rotate around its own axis. The average value of the vertical change measured by the measuring device 402 after one rotation of the slewing bearing 6 is the center distance between the two raceways of the slewing bearing 6. The maximum value minus the minimum value among the values ​​measured by the measuring device 402 is the relative axial runout value of the adjacent raceways of the slewing bearing 6.

[0102] In summary, the measuring device and method provided in this embodiment of the invention operate as follows when inspecting the slewing bearing 6:

[0103] (1) Adjust the position of the positioning device 2 on the platform 1 to adapt to the actual size of the slewing bearing 6 to be measured; select a suitable probe for the model of the slewing bearing 6 and install it on the testing device 4;

[0104] (2) Use the corresponding standard sample block to test device 4:

[0105] Make the first probe 416 of the detection device 4 and the lower raceway (i.e. the first raceway) of the standard sample block align and make contact;

[0106] Loosen the fastening screws connecting the second mounting base 403 and the T-shaped piece 404, and the fastening screws connecting the first mounting base 410 and the T-shaped piece 404, and adjust the relative position of the second probe 405 so that it is aligned and in contact with the upper raceway (i.e. the second raceway) of the standard sample block.

[0107] (3) Place the slewing bearing 6 on the positioning device 2 for horizontal positioning; place the detection device 4 on the adjustable pad 5, and adjust the height of the detection device 4 by adjusting the adjustable pad 5 so that the first probe 416 and the lower raceway (i.e. the first raceway) of the slewing bearing 6 to be tested are aligned and in contact.

[0108] (4) Gently push the detection device 4 forward 1-2m, rotate the knob 412 on the outside of the base 414 so that the detection device 4 is attached to the adjustable pad 5.

[0109] (5) The inspector pushes the slewing bearing 6 to rotate and at the same time visually reads the measurement device 402. The average of the maximum and minimum values ​​measured by the measurement device 402 after the slewing bearing 6 rotates one revolution is the center distance of the double raceway of the slewing bearing 6. The difference between the maximum and minimum values ​​is the relative axial runout of the two adjacent raceways of the slewing bearing 6.

[0110] In summary, the measuring device and method provided in this embodiment of the invention not only design an inspection platform 1 that allows the slewing bearing 6 to rotate stably, but also combine it with a designed detection system, improving the stability of the detection process. Furthermore, a floating structure is designed for the detection device 4, allowing the probe to float both axially and radially, eliminating the influence of the ellipticity of the two raceways of the slewing bearing 6 and the axial and radial errors of the reference raceway on the detection results. Moreover, this measuring device can not only accurately measure the center distance between the two raceways of a double-row ball slewing bearing, but also detect the relative axial runout of adjacent raceways, and eliminate possible random errors during the detection of the center distance between the two raceways of a double-row ball slewing bearing, exhibiting good repeatability and reproducibility. In addition, the measuring device is easy to operate, applicable to different models of slewing bearings 6, and convenient to use after adjustment, significantly improving measurement efficiency.

[0111] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0112] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0113] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A measuring device, characterized in that, include: Platform (1); A positioning device (2) is installed on the platform (1) to support the slewing bearing (6) and to position the slewing bearing (6) horizontally. The detection device (4) is set on the platform (1) for measuring the center distance between the double raceways and the relative axial runout of the adjacent raceways of the slewing bearing (6). The detection device (4) is provided with a double floating structure that can compensate for the axial and radial errors of the slewing bearing (6). The detection device (4) includes: Base (414); The first sliding member (401) is located above the base (414) and extends along a first straight line direction, which is parallel to the axial direction of the slewing bearing (6). A third mounting base (418), a first mounting base (410), a second sliding member (408), and a second mounting base (403) are provided at intervals on one side of the first sliding member (401). The second sliding member (408) is slidably connected to the first sliding member (401) and can reciprocate relative to the first sliding member (401) along the first straight line direction. The third mounting base (418), the first mounting base (410), and the second mounting base (403) are detachably connected to the first sliding member (401). The second elastic connector (409) is connected at both ends to the first mounting base (410) and the second sliding member (408). The first probe (416) is disposed on the third mounting base (418) and located on the side of the first sliding member (401) near the slewing bearing member (6), for contacting the first raceway of the slewing bearing member (6); a first elastic member is disposed between the first probe (416) and the third mounting base (418) to form a first radial floating structure, so that the first probe (416) and the slewing bearing member (6) are in elastic contact; The second probe (405) is disposed on the second sliding member (408). The second probe (405) is slidably mounted on the side of the first sliding member (401) near the slewing bearing member (6) via the second sliding member (408) for contacting the second raceway of the slewing bearing member (6). A second elastic member (419) is disposed between the second probe (405) and the second sliding member (408) to form a second radial floating structure, so that the second probe (405) and the slewing bearing member (6) are in elastic contact. A measuring device (402) is disposed on the second mounting base (403) and located on the side of the first sliding member (401) close to the slewing bearing (6). The measuring end of the measuring device (402) abuts against the second sliding member (408). The moving distance of the second probe (405) relative to the first probe (416) is measured by measuring the moving distance of the second sliding member (408) relative to the first sliding member (401). The base (414) is provided with an axial floating structure, which includes a guide connection (415) and a first elastic connector (413). The guide connection (415) is located above the base (414) and is fixedly connected to the base (414). The first sliding member (401) is slidably connected to the guide connection (415) in the first straight direction and is elastically connected to the base (414) through the first elastic connector (413). The first sliding member (401) can reciprocate relative to the base (414) along the first straight direction. The measuring device also includes an adjustable pad (5), which includes a first pad unit (502), a second pad unit (503), and a bolt (501); the detection device (4) is disposed on the first pad unit (502); the first pad unit (502) is placed above the second pad unit (503), and the contact surface between the two is an inclined plane that is relatively inclined to the vertical plane. The first pad unit (502) and the detection device (4) can be moved up / down along the inclined plane by the bolt (501); the bottom of the second pad unit (503) is located in the first groove of the platform (1), and the adjustable pad (5) and the detection device (4) can be adjusted to move closer to or further away from the slewing bearing (6) by the first groove.

2. The measuring device according to claim 1, characterized in that, The platform (1) is provided with a plurality of positioning devices (2) that can be arranged sequentially along the circumference of the slewing support (6).

3. The measuring device according to claim 2, characterized in that, Each of the positioning devices (2) is provided with a support (202) and a limiting part (201): The support (202) is used to support the slewing bearing (6); The limiting part (201) is located above the supporting part (202) and is used to abut against the slewing bearing (6) to horizontally limit the slewing bearing (6) in the radial direction.

4. The measuring device according to claim 3, characterized in that, The limiting part (201) is a cylindrical structure, and the supporting part (202) is a disc structure with a larger diameter than the limiting part (201) and coaxially connected to the limiting part (201). The central axis of the limiting part (201) is parallel to the central axis of the slewing bearing (6).

5. The measuring device according to claim 3, characterized in that, The bottom connecting shaft (203) of the support part (202) is fitted with a bearing (204) and a bearing seat (206), and the bearing seat (206) is fixedly installed on the slide plate (3); the platform (1) is provided with a second groove that slides with the slide plate (3).

6. The measuring device according to claim 1, characterized in that, The detection device (4) is fixed to the adjustable pad (5) by magnetic adsorption.

7. The measuring device according to claim 6, characterized in that, The base (414) is provided with a knob (412) that allows the detection device (4) to be attached to the adjustable pad (5).

8. A measurement method, characterized in that, The measuring device described in any one of claims 1 to 7 is used to measure the center distance between the two raceways and the relative axial runout of adjacent raceways of the slewing bearing (6), the measuring method comprising: The detection device (4) in the measuring device is aligned with the standard sample block, and the slewing bearing (6) to be measured is placed on the positioning device (2) of the measuring device; Place the detection device (4) on the platform (1) and adjust the height of the first probe (416) of the detection device (4) below so that it fits against the first raceway of the slewing bearing (6) below. Rotate the slewing bearing (6) and measure the center distance between the two raceways and the relative axial runout of the adjacent raceways using the detection device (4).

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