Radial clearance measuring device for large-size deep groove ball bearing

Abstract

The utility model relates to the technical field of bearing measurement, in particular to a large-size deep groove ball bearing radial clearance measuring device, which comprises a measuring platform, a fixing assembly, a forcing device and a measuring assembly, and is characterized in that a plurality of fulcrums are arranged at the top of the measuring platform and are uniformly distributed around the center of the measuring platform; the fulcrum is used for supporting an inner ring of the deep groove ball bearing to be measured; the fixing assembly is used for fixing the deep groove ball bearing to be measured supported on the fulcrum; the forcing device is used for clamping an inner ring and an outer ring of the deep groove ball bearing to be measured, so that a steel ball of the deep groove ball bearing to be measured and a channel of the deep groove ball bearing to be measured are attached and reset; the measuring assembly is arranged on the measuring platform, and a measuring head of the measuring assembly is in contact with an outer ring of the deep groove ball bearing to be measured. According to the device, the radial clearance measurement of the deep groove ball bearing with the outer diameter larger than or equal to phi 500mm is realized, and the measurement precision is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing measurement, in particular to a radial clearance measuring device for a large-size deep groove ball bearing. Background Art

[0002] The bearing clearance is closely related to the bearing life, temperature rise, vibration and noise. The so-called clearance is the gap between the inner ring, outer ring and rolling element (steel ball) of the bearing. Figure 6 As shown, the measurement of radial clearance is the key to achieving this performance indicator.

[0003] The existing clearance measuring device adopts the following method: Figure 7 The standard clearance measuring instruments shown are X092, X093, X094 and X095. When measuring with these instruments, the bearing needs to be inserted into a horizontally fixed mandrel and the inner ring needs to be fixed on the mandrel. Figure 7 A measuring force is applied to the bearing outer ring in directions A and B, causing the bearing to move up and down. The gauge uses a lever to read the maximum and minimum values ​​of the bearing's up and down movement, representing the bearing's radial clearance. This instrument uses the standard measurement method and requires a custom spindle tailored to the bearing's inner diameter. The maximum measurement range is for bearing outer diameters D ≤ φ250mm.

[0004] However, for large deep groove ball bearings, dedicated measuring instruments are unavailable. Measurements are typically made using a simple manual push method, rather than force measurement. When measuring deep groove ball bearings with an outer diameter of 500 mm or greater, manual push is impractical due to their heavy weight. Bearing manufacturers typically measure the part dimensions and then calculate the radial clearance using a theoretical estimate. However, this theoretical estimate can have significant errors, making accurate radial clearance determination difficult.

[0005] Therefore, it is necessary to provide a large-size deep groove ball bearing radial clearance measuring device to solve the above problems. Utility Model Content

[0006] The utility model provides a large-size deep groove ball bearing radial clearance measuring device to solve the existing problems.

[0007] The utility model discloses a large-size deep groove ball bearing radial clearance measuring device adopts the following technical solutions, including:

[0008] A measuring platform, the top of which is provided with multiple fulcrums, which are evenly distributed around the center of the measuring platform and are used to support the inner ring of the deep groove ball bearing to be measured;

[0009] A fixing assembly, used to fix the deep groove ball bearing to be tested supported on a fulcrum;

[0010] A force-applying device, used to clamp the inner and outer rings of the deep groove ball bearing to be tested;

[0011] and a measuring assembly, which is arranged on the measuring platform, and a measuring head of the measuring assembly contacts the outer ring of the deep groove ball bearing to be measured.

[0012] Preferably, the fixing assembly includes: a pressure plate and a fastening screw, the pressure plate is set on the top of the inner ring of the deep groove ball bearing to be measured along the diameter of the deep groove ball bearing to be measured, and the fastening screw passes through the pressure plate and is connected to the measuring platform.

[0013] Preferably, a through hole for passing a fastening screw is provided in the middle of the pressure plate, and a notch for the screw rod of the fastening screw to enter is provided on one side of the through hole.

[0014] Preferably, the measuring assembly comprises: a magnetic meter stand fixed on the measuring platform, on which a dial indicator is provided, and the probe of the dial indicator contacts the radial middle of the outer ring of the deep groove ball bearing to be measured.

[0015] Preferably, a cross-shaped sliding groove is provided on the measuring platform, wherein the fulcrum is slidably connected in each sliding groove.

[0016] Preferably, a scale line is provided on one side of each chute.

[0017] Preferably, the force applying device is a G-type clamp.

[0018] Preferably, the deep groove ball bearing to be tested is a deep groove ball bearing with an outer diameter of ≥φ500 mm.

[0019] The beneficial effects of the utility model are:

[0020] 1. By fixing the inner ring of the deep groove ball bearing and applying a fixed measuring force to the outer ring of the deep groove ball bearing, the steel ball and the groove of the deep groove ball bearing are reset. The radial clearance of the deep groove ball bearing is measured multiple times, and the average radial clearance is used as the final radial clearance of the deep groove ball bearing to ensure measurement accuracy.

[0021] 2. Through the sliding setting of the fulcrum, the device can support deep groove ball bearings of different sizes by adjusting the position of the fulcrum, so it can be used for batch and different size segments of deep groove ball bearings with high measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1This is a schematic diagram of the overall structure of a large-size deep groove ball bearing radial clearance measuring device of the utility model;

[0024] Figure 2 This is a top view of a radial clearance measuring device for a large-size deep groove ball bearing according to the present invention;

[0025] Figure 3 This is a schematic diagram of the clamping of the force-applying device during radial clearance measurement of the present invention;

[0026] Figure 4 Schematic diagram of the misalignment of the steel balls and the groove of the deep groove ball bearing to be tested when the inner ring of the deep groove ball bearing to be tested is supported in an embodiment of the present utility model;

[0027] Figure 5 Schematic diagram of the steel ball and groove of the deep groove ball bearing to be tested after the inner ring of the deep groove ball bearing to be tested is supported in an embodiment of the present invention;

[0028] Figure 6 Schematic diagram of the radial clearance of a deep groove ball bearing;

[0029] Figure 7 Schematic diagram of a standard clearance measurement instrument in the prior art.

[0030] In the figure: 1. Deep groove ball bearing to be measured; 2. Measuring assembly; 3. Measuring platform; 4. Fastening screws; 5. Pressure plate; 6. Fulcrum; 7. Force-applying device. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] The present invention provides an embodiment of a large-size deep groove ball bearing radial clearance measuring device, which is used to measure the radial clearance of deep groove ball bearings with an outer diameter of ≥φ500mm. Figure 1As shown, it includes: a measuring platform 3, a fixing assembly, a force device 7 and a measuring assembly 2. A plurality of fulcrums 6 are arranged on the top of the measuring platform 3. The plurality of fulcrums 6 are evenly distributed around the center of the measuring platform 3. The fulcrums 6 are used to support the inner ring of the deep groove ball bearing 1 to be measured; the fixing assembly is used to fix the deep groove ball bearing 1 to be measured supported on the fulcrum 6; the force device 7 is used to clamp the inner ring and outer ring of the deep groove ball bearing 1 to be measured so that the steel ball of the deep groove ball bearing 1 to be measured fits and resets the groove of the deep groove ball bearing 1 to be measured; the measuring assembly 2 is arranged on the measuring platform 3 and the measuring head of the measuring assembly 2 contacts the outer ring of the deep groove ball bearing 1 to be measured. It should be noted that, as Figure 4 As shown, due to the large size of the deep groove ball bearing 1 to be tested and its own weight, when the fulcrum 6 supports the inner ring of the deep groove ball bearing 1 to be tested, the outer ring of the deep groove ball bearing 1 to be tested will naturally sag, making it difficult to reset the steel balls and the groove of the deep groove ball bearing 1 to be tested. A pre-tightening device is required to eliminate the misalignment of the steel balls and the groove caused by the dead weight of the deep groove ball bearing 1 to be tested when it is placed vertically, as shown in FIG. Figure 5 As shown, in this embodiment, the force applying device 7 is used to clamp the inner ring and the outer ring of the deep groove ball bearing 1 to be measured, so that the steel ball of the deep groove ball bearing 1 to be measured is fit and reset with the groove of the deep groove ball bearing 1 to be measured; thereby ensuring that the measurement component 2 measures the value after the steel ball and the groove are reset, and the measurement accuracy is higher.

[0033] like Figure 1 and Figure 2 As shown, the fixing assembly includes: a pressure plate 5 and a fastening screw 4. The pressure plate 5 is set on the top of the inner ring of the deep groove ball bearing 1 to be measured along the diameter of the deep groove ball bearing 1 to be measured. The fastening screw 4 passes through the pressure plate 5 and is connected to the measuring platform 3.

[0034] like Figure 2 As shown, a through hole for the fastening screw 4 is provided in the middle of the pressure plate 5, and a notch for the screw rod of the fastening screw 4 to enter is provided on one side of the through hole.

[0035] like Figure 1 As shown, the measuring assembly 2 includes: a magnetic meter frame, which is adsorbed on the measuring platform 3, on which a dial indicator is arranged, and the probe of the dial indicator contacts the middle part of the outer ring of the deep groove ball bearing 1 to be measured in the radial direction.

[0036] like Figure 2 As shown, in order to adapt to the support of deep groove ball bearings 1 to be tested of different sizes, in this embodiment, a M-shaped slide groove is opened on the measuring platform 3, wherein the fulcrum 6 is slidably connected in each slide groove, and a scale line is set on one side of each slide groove. The position of the fulcrum 6 in the slide groove is adjusted by moving. During adjustment, multiple fulcrums 6 are adjusted according to the scale lines to ensure that multiple fulcrums 6 are on the same circle, thereby achieving precise support for deep groove ball bearings 1 to be tested of different sizes.

[0037] like Figure 3As shown, the force applying device 7 adopts a G-type clamp.

[0038] How it works

[0039] When measuring, first adjust the positions of the three fulcrums 6 in the chute according to the inner ring diameter of the deep groove ball bearing 1 to be measured and the scale lines. Then, place the inner ring of the deep groove ball bearing 1 to be measured on the fulcrum 6 on the measuring platform 3. Press the pressure plate 5 of the fixing assembly on the top of the inner ring of the deep groove ball bearing 1 to be measured. Then, use the fixing screws 4 to pass through the pressure plate 5 and fix it to the measuring platform 3. At this time, the inner ring of the deep groove ball bearing 1 to be measured is fixed and supported, while the outer ring of the deep groove ball bearing 1 to be measured naturally droops due to gravity. Figure 2 As shown, the magnetic table frame of the measuring component 2 is adsorbed on the measuring platform 3 on one side of the measuring point A of the deep groove ball bearing 1 to be measured, and the probe of the dial indicator of the measuring component 2 is brought into contact with the middle of the outer ring of the deep groove ball bearing 1 to be measured in the radial direction. At this time, above the measuring probe at point A, use the force device 7 to tighten the outer ring and inner ring of the deep groove ball bearing 1 to be measured, and slowly tighten them until they cannot be twisted. At this time, the steel ball and raceway of the deep groove ball bearing 1 to be measured are reset by force, and the dial of the dial indicator of the measuring component 2 is adjusted to return the pointer to zero. The force device 7 is swapped, and at the measuring point B of the deep groove ball bearing 1 to be measured, the outer ring and inner ring of the deep groove ball bearing 1 to be measured are clamped, and slowly tightened until they cannot be twisted. After the steel ball and raceway of the deep groove ball bearing 1 to be measured are reset by force, the measurement value of the dial indicator of the measuring component 2 is read, the force device 7 is removed and the outer ring of the deep groove ball bearing 1 to be measured is rotated, and three evenly distributed different points are selected for measurement in the same way, and the average value of the measurements is taken as the actual radial clearance Gr of the deep groove ball bearing 1 to be measured.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A radial clearance measuring device for large-size deep groove ball bearings, characterized in that: include: A measuring platform (3) is provided with a plurality of fulcrums (6) on its top, the plurality of fulcrums (6) being evenly distributed around the center of the measuring platform (3), the fulcrums (6) being used to support the inner ring of the deep groove ball bearing (1) to be measured; A fixing assembly for fixing the deep groove ball bearing (1) to be tested supported on the fulcrum (6); A force applying device (7) for clamping the inner ring and the outer ring of the deep groove ball bearing (1) to be tested; And a measuring component (2), which is arranged on a measuring platform (3), and a measuring head of the measuring component (2) contacts the outer ring of the deep groove ball bearing (1) to be measured.

2. A large-size deep groove ball bearing radial clearance measuring device according to claim 1, characterized in that: The fixing assembly includes: a pressure plate (5) and a fastening screw (4); the pressure plate (5) is arranged on the top of the inner ring of the deep groove ball bearing (1) to be measured along the diameter of the deep groove ball bearing (1); and the fastening screw (4) passes through the pressure plate (5) and is connected to the measuring platform (3).

3. A large-size deep groove ball bearing radial clearance measuring device according to claim 2, characterized in that: A through hole for passing the fastening screw (4) is provided in the middle of the pressure plate (5), and a notch for the screw rod of the fastening screw (4) to enter is provided on one side of the through hole.

4. A large-size deep groove ball bearing radial clearance measuring device according to claim 1, characterized in that: The measuring assembly (2) comprises: a magnetic meter frame fixed on a measuring platform (3), on which a dial indicator is arranged, and a probe of the dial indicator contacts the middle portion of the outer ring of the deep groove ball bearing (1) to be measured in the radial direction.

5. A large-size deep groove ball bearing radial clearance measuring device according to claim 1, characterized in that: A M-shaped slide groove is provided on the measuring platform (3), wherein a fulcrum (6) is slidably connected in each slide groove.

6. A large-size deep groove ball bearing radial clearance measuring device according to claim 5, characterized in that: There are scale lines on one side of each chute.

7. A large-size deep groove ball bearing radial clearance measuring device according to claim 1, characterized in that: The force adding device (7) adopts a G-type clamp.

8. The large-size deep groove ball bearing radial clearance measuring device according to claim 1, characterized in that: The deep groove ball bearing (1) to be tested is a deep groove ball bearing with an outer diameter of ≥φ500mm.

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