Device for measuring roundness of inner and outer steel rings of bearing

Abstract

The utility model provides a device for measuring the roundness of inner and outer steel rings of a bearing, which is characterized in that a sliding chute is arranged on a rotary table, and a driving frame is coaxially and rotatably arranged below the rotary table; the driving frame comprises driving grooves formed in the radial direction of the rotary table, the projections of the driving grooves and the projections of the sliding grooves on the rotary table are matched in a crossed mode, the driving grooves and the sliding grooves are arranged in a one-to-one alignment mode, the positioning blocks are arranged in the sliding grooves and the driving grooves in a surrounding mode at intervals in the circumferential direction of the rotary table, and the positioning blocks can be positioned at the crossed points of the sliding grooves and the driving grooves. The driving frame is in transmission connection with the second driver, and when the second driver drives the driving frame to rotate, the positioning blocks located at the intersection position of the driving groove and the sliding groove can be synchronously gathered or synchronously diverged, so that the to-be-detected steel ring arranged on the rotary table is coaxially fixed to the rotary table. The device for measuring the roundness of the inner and outer steel rings of the bearing is simple and effective in linkage driving structure for the positioning block, and can effectively reduce the hardware cost.

Description

A bearing inner and outer steel ring roundness measuring device Technical Field

[0001] This utility model relates to the field of roundness measurement technology, and in particular to a device for measuring the roundness of the inner and outer steel rings of a bearing. Background Technology

[0002] The main function of bearings is to support the two parts of a rotating mechanical body and reduce the coefficient of friction during its movement. They are an important component in modern mechanical equipment.

[0003] When used in components such as engines and transmissions, high rotational accuracy is required to ensure the reliable operation of these components. To ensure bearing accuracy, all bearings require roundness measurements of both inner and outer rings before leaving the factory to confirm that their accuracy meets the requirements of the corresponding application.

[0004] Since both the inner and outer rings of the bearing need to be roundness measured, the fixing structure must be able to fix the bearing steel rings from the inside and outside respectively to avoid obstructing the measurement. Also, the bearing steel rings must be coaxial with the rotating disk after fixing. In the existing technology, a three-jaw chuck or similar device is generally chosen to fix the bearing steel rings. However, the jaw linkage mechanism of the three-jaw chuck is relatively complex and costly. Summary of the Invention

[0005] Therefore, the purpose of this utility model is to provide a bearing inner and outer steel ring roundness measuring device to solve the problem that the chuck jaw linkage mechanism of the chuck used for positioning and fixing bearing steel rings in the prior art is relatively complex and costly.

[0006] This utility model provides a device for measuring the roundness of inner and outer steel rings of a bearing, comprising: a base, a turntable, a drive motor, and a measuring assembly disposed on the base, wherein the turntable is pulsatorically connected to the drive motor, and a measuring sensor in the measuring assembly is positioned pointing towards the turntable.

[0007] The turntable is provided with a radially extending slide groove, in which a positioning block is slidably disposed. A drive frame is also coaxially rotatably disposed below the turntable.

[0008] The drive frame includes a drive groove arranged radially along the turntable. The drive groove and the slide groove are cross-matched on the projection of the slide groove on the turntable. The drive groove and the slide groove are arranged one-to-one. At least three drive grooves are arranged at intervals around the circumference of the turntable. The positioning block is also slidably arranged in the drive groove.

[0009] The drive frame is also connected to the second driver so that when the second driver drives the drive frame to rotate, the positioning blocks located at the intersection of the drive groove and the slide groove can be synchronously brought together or synchronously dispersed, thereby coaxially fixing the steel ring to be tested on the turntable.

[0010] Optionally, there are three drive slots and three slides, which are evenly spaced along the circumference of the turntable, and the drive frame has a Y-shaped structure.

[0011] Optionally, one of the drive groove and the slide groove is arc-shaped.

[0012] Optionally, a first mounting frame is fixedly provided below the turntable, and the drive frame is clamped between the first mounting frame and the turntable. The second drive includes a cylinder, which is rotatably mounted on the first mounting frame, and the output shaft of the cylinder is eccentrically connected to the drive frame.

[0013] Optionally, a first protective shell is also provided below the turntable, the drive frame and the second driver are disposed inside the first protective shell, and the turntable is also rotatably connected to the base through the first protective shell.

[0014] Optionally, the turntable is provided with transmission teeth on its edge, and the output end of the drive motor is connected to the first transmission gear, which meshes with the turntable.

[0015] Optionally, the measuring assembly further includes a second mounting bracket, which is a two-dimensional movable bracket, and the measuring sensor is mounted on the second mounting bracket.

[0016] Optionally, the second mounting bracket includes an upright and a crossbar, the upright being fixedly mounted on the base, and the crossbar being movably positioned on the upright.

[0017] A lead screw and a movable rod are arranged in parallel within the crossbar. The lead screw is rotatably mounted within the crossbar. One end of the lead screw extends from the first end of the crossbar, and a knob is provided at the extended end of the lead screw. The movable rod is threadedly connected to the lead screw, and one end of the movable rod extends from the second end of the crossbar. The measuring sensor is located at the extended end of the movable rod.

[0018] Optionally, the lead-out end of the movable rod is provided with a hinge seat, the measuring sensor is mounted on the hinge seat, and the probe of the measuring sensor is positioned downwards.

[0019] Optionally, the upright is provided with a scale groove and a movable block that is slidably sleeved on the upright. The crossbar is fixedly mounted on the movable block. The movable block is provided with a spring buckle that locks and matches the scale groove. The movable block is also provided with a fastening bolt so that the movable block can be fixed to the upright through the fastening bolt.

[0020] This invention relates to a bearing inner and outer ring roundness measuring device. A sliding groove is provided on a turntable, and a drive frame is coaxially rotatable below the turntable. The drive frame includes a drive slot arranged radially along the turntable. The projections of the drive slot and the sliding groove on the turntable are cross-matched, and the drive slot and sliding groove are aligned one-to-one. At least three drive slots are spaced at intervals around the circumference of the turntable. Positioning blocks are slidably disposed in the sliding groove and the drive slot, and can be positioned at the intersection of the sliding groove and the drive slot. The drive frame is driven by a second driver. When the second driver drives the drive frame to rotate, the positioning blocks located at the intersection of the drive slot and the sliding groove can be synchronously brought together or synchronously dispersed, thereby coaxially fixing the ring to be measured on the turntable. The linkage drive structure of the positioning blocks in this bearing inner and outer ring roundness measuring device is simple and effective, and can effectively reduce hardware costs.

[0021] Furthermore, the second actuator is selected as a cylinder, which can provide continuous preload, improve the reliability of continuous fixation of the bearing steel ring, avoid loosening during measurement, and ensure measurement reliability.

[0022] Furthermore, the upright of the second mounting bracket is provided with a scale groove, which can easily position the measuring sensor at various measuring height positions, facilitating the roundness measurement needs of various parts of the gear steel ring and improving the applicability. Attached Figure Description

[0023] Figure 1 is a schematic diagram of the overall structure of the bearing inner and outer steel ring roundness measuring device in an embodiment of this utility model.

[0024] Figure 2 is a schematic diagram of the back cross-sectional structure of the turntable part of the bearing inner and outer steel ring roundness measuring device in an embodiment of the present invention.

[0025] Figure 3 is a partial cross-sectional view of the second mounting bracket of the bearing inner and outer steel ring roundness measuring device in an embodiment of this utility model.

[0026] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0027] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0028] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] To address the problem of complex and costly chuck linkage mechanisms in existing bearing ring positioning and fixing technologies, this invention provides a bearing inner and outer ring roundness measuring device. The device features a sliding groove on a turntable, with a drive frame rotatably mounted coaxially below the turntable. The drive frame includes a drive slot arranged radially along the turntable, with the drive slot and sliding groove intersecting on the turntable. Each drive slot and sliding groove is aligned one-to-one, and at least three drive slots are spaced at intervals around the circumference of the turntable. Positioning blocks are slidably disposed within the sliding groove and drive slot, and can be positioned at the intersection of the sliding groove and drive slot. The drive frame is connected to a second driver. When the second driver drives the drive frame to rotate, the positioning blocks located at the intersection of the drive slot and sliding groove can be synchronously brought together or dispersed, thereby coaxially fixing the bearing ring to be measured on the turntable. The linkage drive structure for the positioning blocks is simple and effective, significantly reducing hardware costs.

[0031] Specifically, please refer to Figures 1, 2, and 3, which show schematic diagrams of the various parts of the bearing inner and outer steel ring roundness measuring device in this embodiment.

[0032] The base 100 is used for the installation and support of other structures. The base 100 is equipped with a turntable 200, a drive motor 240 and a measuring component. The turntable 200 is connected to the drive motor 240. The measuring sensor 301 in the measuring component is positioned on the turntable 200 so that the steel ring 1 to be tested is coaxially positioned on the turntable 200. The drive motor 240 drives the turntable 200 to rotate. The measuring sensor 301 can be positioned on the turntable 200 and contact the inner or outer ring of the steel ring 1 to be tested. As the steel ring 1 to be tested rotates, the reading jump of the measuring sensor 301 corresponds to the roundness of the steel ring 1 to be tested. The measuring sensor 301 is connected to an industrial control computer. By analyzing the reading of the measuring sensor 301 through the industrial control computer, the roundness of the steel ring 1 to be tested can be obtained.

[0033] To achieve coaxial fixation of the steel ring 1 to be tested, in this embodiment, a radially extending slide groove 211 is provided on the turntable 200, and a positioning block 201 is slidably disposed in the slide groove 211. A drive frame 220 is also coaxially rotatably disposed below the turntable 200. The drive frame 220 includes a drive groove arranged radially along the turntable 200. The projections of the drive groove and the slide groove 211 on the turntable 200 are cross-matched. The drive groove and the slide groove 211 are aligned one-to-one, and at least three are arranged at intervals around the circumference of the turntable. The positioning block 201 is also slidably disposed in the drive groove, which can position the positioning block 201 at the intersection of the drive groove and the slide groove 211.

[0034] The drive frame 220 is also connected to the second driver 221 so that when the second driver 221 drives the drive frame 220 to rotate, the intersection of the drive groove and the slide 211 will move synchronously, which can synchronously gather or disperse the positioning blocks 201 located at the intersection of the drive groove and the slide 211, thereby coaxially fixing the steel ring 1 to be tested placed on the turntable 200 on the turntable 200.

[0035] To ensure the synchronization of each positioning block 201, the structures of each set of drive slots and slides 211 are identical.

[0036] To ensure the positioning effect, each positioning block 201 needs to be kept vertical. Correspondingly, the matching segment I-shaped structure of each positioning block 201 with the drive groove and slide 211 can prevent the positioning block 201 from shifting, ensure the verticality of the positioning block 201, and thus ensure the cocircularity of the contact point of the steel ring 1 to be tested, and ensure the coaxial fixing effect of the steel ring 1 to be tested and the turntable 200.

[0037] To ensure reliable fixation, in this embodiment, there are three drive grooves and three slide grooves 211, evenly spaced along the circumference of the turntable 200, and the drive frame 220 has a Y-shaped structure. Furthermore, in this embodiment, the drive groove is arc-shaped. In optional embodiments, the slide groove 211 can also be an arc-shaped groove. Arc-shaped grooves can improve smoothness of movement, reduce wear, and increase service life.

[0038] To facilitate the installation of the drive frame 220, in this embodiment, a first mounting frame 222 is also fixedly installed below the turntable 200. The drive frame 220 is clamped between the first mounting frame 222 and the turntable 200. The second driver 221 includes a cylinder, which is rotatably mounted on the first mounting frame 222. The output shaft of the cylinder is eccentrically connected to the drive frame 220. The rotation of the drive frame 220 can be controlled by the extension and retraction of the cylinder. The continuous force of the cylinder can maintain the clamping preload of each positioning block 201 inward or outward towards the steel ring 1 to be tested, thus ensuring the fixing effect.

[0039] To facilitate the installation of the turntable 200, in this embodiment, a first protective shell 230 is also provided below the turntable 200. The drive frame 220, the second driver 221, and the first mounting frame 222 are all located inside the first protective shell 230, avoiding damage to the drive frame 220, the second driver 221, and the first mounting frame 222 during assembly operations, thereby ensuring the reliability of the drive accuracy. The turntable 200 is also rotatably connected to the base 100 through the first protective shell 230. The first protective shell 230 has sufficient usable surface, which facilitates ensuring the rotational connection accuracy between it and the base 100. The rotational structure may include a support bearing structure on the bottom surface of the first protective shell 230, a limiting bearing structure on the side, etc. (not shown in the figure), which can ensure the overall rotational stability of the turntable 200 and ensure measurement accuracy.

[0040] The control cables of the second driver 221 and the drive motor 240 can be led out of the base 100 for communication and control connection with an external industrial control computer, allowing the computer to control their operation. The rotational connection between the first protective shell 230 and the base 100 is preferably achieved by a bearing structure on the side, freeing up bottom space for the control cables of the second driver 221 to be arranged at the bottom of the first protective shell 230. The first protective shell 230 may also contain structures such as brushes for arranging the control cables of the second driver 221.

[0041] It is understood that those skilled in the art can achieve the electrical connection between the moving part and the fixed part using various conventional technical means in the field. The inventive point of this application lies mainly in the design of the mechanical structure. No special limitation is made on the electrical connection design, and undisclosed electrical connection designs will not affect the feasibility of this application.

[0042] To facilitate the rotation drive of the turntable 200, in this embodiment, the edge of the turntable 200 is provided with transmission teeth. The output end of the drive motor 240 is connected to the first transmission gear 241, and the first transmission gear 241 meshes with the transmission teeth on the edge of the turntable 200. This also facilitates the horizontal arrangement of the turntable 200 and the drive motor 240, increasing the area of ​​the base 100, thereby improving the stability of the base 100 and reducing the impact of vertical structural offset and swaying on the measurement.

[0043] The diameter of the first transmission gear 241 is smaller than the diameter of the turntable 200, which facilitates the formation of a reduction structure, ensures driving torque and driving effect, and at the same time reduces the rotational speed of the turntable 200, reducing the impact of centrifugal force on the fixing effect. The actual rotational speed can be adjusted according to specific circumstances to ensure measurement accuracy.

[0044] To facilitate contact between the probe of the measuring sensor 301 and the steel ring 1 to be measured, in this embodiment, the measuring assembly further includes a second mounting frame, which is a two-dimensional movable frame, and the measuring sensor 301 is mounted on the second mounting frame.

[0045] As shown in Figures 1 and 3, the second mounting frame includes a vertical rod 310 and a horizontal rod 320. The vertical rod 310 is fixedly mounted on the base 100, and the horizontal rod 320 is movably positioned on the vertical rod 310. A lead screw 322 and a movable rod 321 are arranged parallel to each other in the horizontal rod. The lead screw 322 is rotatably mounted in the horizontal rod 320. One end of the lead screw 322 is led out from the first end of the horizontal rod 320, and a knob is provided at the lead screw 322 lead-out end so as to drive the lead screw 322 to rotate. A connecting block is vertically led out from the movable rod 321. The connecting block is threadedly connected to the lead screw 322. One end of the movable rod 321 is led out from the second end of the horizontal rod 322, and a measuring sensor 301 is located at the lead-out end of the movable rod 321.

[0046] When measuring the roundness of the outer ring of the steel ring 1 to be tested, firstly, raise the crossbar 320 to raise the probe of the measuring sensor 301, avoiding obstruction of the placement of the steel ring 1. Then, the second actuator 221 activates, tightening each positioning block 201, placing the steel ring 1 on the turntable 200. The second actuator 221 then activates, causing each positioning block 201 to open and move until it is pre-tightened to the inner wall of the steel ring 1, thus coaxially fixing the steel ring 1 on the turntable 200. Finally, the screw 322 is turned, driving the movable rod 321 to move, which in turn moves the measuring sensor 301, making... The probe of the measuring sensor 301 is moved horizontally to the inner space of the steel ring 1 to be measured. The crossbar 320 is moved down until the probe of the measuring sensor 301 is positioned at the measuring height of the steel ring 1 to be measured. Then the lead screw 322 is finely adjusted so that the probe of the measuring sensor 301 is pre-tightened (the probe of the measuring sensor 301 has a certain pre-tightening swing capability, and its swing amount can be detected) and contacts the inner ring of the steel ring 1 to be measured. The drive motor 240 is controlled to output, the turntable 200 rotates, and the industrial control computer collects the output data of the measuring sensor 301 and analyzes it to obtain the roundness of the inner ring.

[0047] Similarly, the roundness measurement of the outer ring can be determined based on whether the initial position of the probe of the measuring sensor 301 will obstruct the placement of the steel ring 1 to be measured.

[0048] To facilitate the installation of the measuring sensor 301, in this embodiment, the lead-out end of the movable rod 321 is provided with a hinge seat 340. The measuring sensor 301 is mounted on the hinge seat 340 with its probe facing downwards. The measuring sensor 301 can be hinged by the hinge seat 340, which facilitates the adjustment of the posture of the measuring sensor 301 through the hinge structure. For example, when the steel ring 1 to be measured includes an inner ring groove, the deflection angle of the measuring sensor 301 can be adjusted to achieve contact with the inner ring groove.

[0049] To facilitate the roundness measurement of the steel ring 1 at different heights, in this embodiment, the upright 310 is provided with a scale groove and a movable block 311 is slidably sleeved on the upright 310. The crossbar 320 is fixedly installed on the movable block 311. The movable block 311 is provided with a spring buckle (not shown in the figure) that locks and matches the scale groove. The movable block 311 is also provided with a fastening bolt so that the fixation of the movable block 311 to the upright 310 can be controlled by the fastening bolt.

[0050] After the roundness measurement at a certain height is completed, loosen the fastening bolt to allow the movable block 311 to slide up and down. Through the cooperation of the spring buckle and the scale groove, the movable block 311 can be moved vertically to step and position it at the next readable position. Then tighten the fastening bolt to fix the movable block 311, thereby fixing the probe of the measuring sensor 301 at the corresponding height for roundness measurement at the corresponding height.

[0051] The bearing inner and outer steel ring roundness measuring device provided by this utility model has a slide groove on a turntable, and a drive frame is coaxially rotatably arranged below the turntable. The drive frame includes a drive groove arranged radially along the turntable. The projections of the drive groove and the slide groove on the turntable are cross-matched. The drive groove and the slide groove are aligned one-to-one, and at least three are arranged at intervals around the circumference of the turntable. The positioning block is slidably arranged in the slide groove and the drive groove, and can be positioned at the intersection of the slide groove and the drive groove. The drive frame is driven by a second driver. When the second driver drives the drive frame to rotate, the positioning blocks located at the intersection of the drive groove and the slide groove can be synchronously gathered or synchronously dispersed, thereby coaxially fixing the steel ring to be measured on the turntable. The linkage drive structure of the positioning block is simple and effective, which can effectively reduce hardware costs.

[0052] Furthermore, the second actuator is selected as a cylinder, which can provide continuous preload, improve the reliability of continuous fixation of the bearing steel ring, avoid loosening during measurement, and ensure measurement reliability.

[0053] Furthermore, the upright of the second mounting bracket is provided with a scale groove, which can easily position the measuring sensor at various measuring height positions, facilitating the roundness measurement needs of various parts of the gear steel ring and improving the applicability.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] The embodiments described above are merely illustrative of several specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A device for measuring the roundness of inner and outer steel rings of a bearing, characterized in that, include: The system includes a base, a turntable, a drive motor, and a measuring assembly mounted on the base. The turntable is connected to the drive motor. A measuring sensor in the measuring assembly is positioned towards the turntable. The turntable has a radially extending groove, in which a positioning block is slidably disposed. A drive frame is coaxially rotatable below the turntable. The drive frame includes a drive groove radially arranged on the turntable. The drive groove and the projection of the groove on the turntable are cross-matched. The drive groove and the groove are aligned one-to-one, and at least three drive grooves are spaced at intervals around the circumference of the turntable. The positioning block also... The drive frame is slidably disposed in the drive groove; the drive frame is also connected to the second driver so that when the second driver drives the drive frame to rotate, the positioning blocks located at the intersection of the drive groove and the slide groove can be synchronously brought together or synchronously dispersed, thereby coaxially fixing the steel ring to be tested on the turntable; wherein, a first mounting frame is also fixedly disposed below the turntable, the drive frame is clamped between the first mounting frame and the turntable, the second driver includes a cylinder, the cylinder is rotatably disposed on the first mounting frame, and the output shaft of the cylinder is eccentrically connected to the drive frame.

2. The bearing inner and outer steel ring roundness measuring device according to claim 1, characterized in that, There are three drive slots and three slides, which are evenly spaced along the circumference of the turntable. The drive frame has a Y-shaped structure.

3. The bearing inner and outer steel ring roundness measuring device according to claim 2, characterized in that, One of the drive groove and the slide groove is arc-shaped.

4. The bearing inner and outer steel ring roundness measuring device according to any one of claims 1 to 3, characterized in that, A first protective shell is also provided below the turntable, and the drive frame and the second driver are disposed inside the first protective shell. The turntable is also rotatably connected to the base through the first protective shell.

5. The bearing inner and outer steel ring roundness measuring device according to claim 4, characterized in that, The turntable is provided with transmission teeth on its edge, and the output end of the drive motor is connected to the first transmission gear, which meshes with the turntable.

6. The bearing inner and outer steel ring roundness measuring device according to claim 1, characterized in that, The measuring assembly also includes a second mounting bracket, which is a two-dimensional movable bracket, and the measuring sensor is mounted on the second mounting bracket.

7. The bearing inner and outer steel ring roundness measuring device according to claim 6, characterized in that, The second mounting bracket includes an upright and a crossbar. The upright is fixedly mounted on the base, and the crossbar is movably positioned on the upright. A lead screw and a movable rod are arranged parallel to each other in the crossbar. The lead screw is rotatably mounted in the crossbar, with one end extending from the first end of the crossbar and a knob provided at the extension end. The movable rod is threadedly connected to the lead screw, with one end extending from the second end of the crossbar. The measuring sensor is located at the extension end of the movable rod.

8. The bearing inner and outer steel ring roundness measuring device according to claim 7, characterized in that, The movable rod has a hinged seat at its lead-out end, and the measuring sensor is mounted on the hinged seat with its probe facing downwards.

9. The bearing inner and outer steel ring roundness measuring device according to claim 7, characterized in that, The upright is provided with a scale groove and a movable block that is slidably sleeved on the upright. The crossbar is fixedly mounted on the movable block. The movable block is provided with a spring buckle that locks and matches the scale groove. The movable block is also provided with a fastening bolt, so that the movable block can be controlled to fix the upright through the fastening bolt.

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