Radial clearance measuring device for complete cylindrical roller bearing with flange on outer diameter

Abstract

A radial clearance measuring device for a complete cylindrical roller bearing with a flange on the outer diameter comprises a measuring platform, a threaded rod, a positioning mandrel, a pressing plate, a rivet, a cam handle and a dial indicator, a sinking groove is formed in the measuring platform, a threaded hole is formed in the center of the bottom of the sinking groove, the positioning mandrel is fixedly arranged in the sinking groove, and a through hole is formed in the axis of the positioning mandrel. One end of the threaded rod penetrates through a through hole in clearance fit and then is vertically fixed to the measuring platform through a threaded hole, the other end of the threaded rod is connected with the cam handle through a rivet, the upper surface of the pressing plate is provided with a crescent groove and a through groove which are coaxially communicated, and the radius of the crescent groove is the same as the rotation radius of the cam handle. When the cam handle is locked, the cam handle rotates in the crescent groove and compresses the inner ring of the bearing to be measured through the pressing plate, and the alignment direction of the tip of the dial indicator is perpendicular to the axis direction of the threaded rod. The device can rapidly compress and unlock the inner ring, and rapidly replace the bearing for detection.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing manufacturing, in particular to a radial clearance measuring device for a complete set of cylindrical roller bearings with flanges on the outer diameter. Background Art

[0002] With the widespread use of cylindrical roller bearings in aviation, aerospace, shipbuilding and other fields, the demand continues to increase. As an important characteristic of bearings, radial clearance must be strictly controlled.

[0003] The radial clearance of cylindrical roller bearings is typically measured using specialized instruments. However, bearings with flanged, shaped mounting edges on the outer diameter cannot be tested using specialized instruments, so simple methods are often used on-site. Traditionally, this simple method involves compressing the inner ring with a gasket and nut, and manually pushing the outer ring. This method, which involves tightening the nut with a wrench to compress the inner ring, is extremely inconvenient to install and disassemble, severely limiting on-site testing efficiency and thus increasing the overall bearing delivery cycle.

[0004] In order to improve the production efficiency of bearings, it is urgent to find a simple and convenient quick locking device to tighten the inner ring, improve detection efficiency and reduce labor intensity. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a radial clearance measuring device for a complete set of cylindrical roller bearings with an outer diameter flange, which can quickly tighten and unlock the inner ring and quickly replace the bearing for testing.

[0006] In order to achieve the above technical purpose, the technical solution adopted is: a radial clearance measuring device for a complete set of cylindrical roller bearings with an outer diameter flange, including a measuring platform, a threaded rod, a positioning mandrel, a pressure plate, a rivet, a cam handle and a micrometer. A sink groove is provided on the measuring platform, a threaded hole is provided at the bottom center of the sink groove, the positioning mandrel is clearance-matched with the inner diameter of the inner ring of the bearing to be measured, a fixing block matching the sink groove is provided at the bottom of the positioning mandrel, a through hole is provided at the axis of the positioning mandrel, one end of the threaded rod passes through the clearance-matched through hole and then passes through the threaded The hole is fixed vertically on the measuring platform, and the other end of the threaded rod is connected to the cam handle by a rivet; the upper surface of the pressure plate is provided with a crescent groove and a through groove which are coaxially connected. The radius of the crescent groove is the same as the rotation radius of the cam handle, and the groove width of the through groove is the same as the diameter of the threaded rod. The pressure plate is sleeved on the threaded rod. When the cam handle is locked, the cam handle rotates in the crescent groove to press the inner ring of the measured bearing through the pressure plate. The tip of the micrometer is in contact with the outer ring of the measured bearing, and the tip of the micrometer is aligned in a direction perpendicular to the axis of the threaded rod.

[0007] The upper surface of the measuring platform of the utility model is provided with a strip-shaped groove extending from the sink to the outside.

[0008] The utility model has two grooves which are arranged in a cross-shaped form, and the center of the cross is a sink.

[0009] The upper side of the positioning core shaft is provided with a chamfer.

[0010] The beneficial effects of the utility model are:

[0011] 1. The bearing under test is fixed by positioning the mandrel, threaded rod, pressure plate, and cam handle. The initial adjustment of the depth of the threaded rod into the threaded hole is sufficient to determine the position of the cam handle when compressing the inner ring of the bearing under test. The through-slots on the pressure plate allow for quick assembly and disassembly. By lifting the cam handle, the entire bearing can be removed without removing the threaded rod, allowing for quick installation and measurement of another bearing of the same model. The inner ring of the bearing under test is tightened or loosened by pressing down or lifting the cam handle. This system offers advantages such as easy operation, simple structure, economical manufacturing, high testing efficiency, low labor intensity, and suitability for mass production.

[0012] 2. To prevent the bearing being tested from adsorbing onto the measuring platform, grooves are added to the accessible area to facilitate quick bearing removal. The cross-shaped grooves are effective for different bearing models, eliminating the need to consider placement and facilitating molding. 3. The upper side of the positioning mandrel is chamfered to facilitate quick installation of the inner ring of the bearing being tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 yes Figure 1 sectional view of

[0015] Figure 3 This is a diagram of a compression gasket; in the diagram: 1. Cam handle; 2. Pressure plate; 2-1. Through groove; 2-2. Crescent groove; 3. Bearing to be measured; 3-1. Inner ring; 3-2. Roller; 3-3. Outer ring; 4. Micrometer; 5. Measuring platform; 5-1. Groove; 5-2. Countersunk groove; 5-3. Threaded hole; 6. Rivet; 7. Threaded rod; 8. Positioning mandrel; 8-1. Chamfer; 8-2. Through hole. DETAILED DESCRIPTION

[0016] The following provides preferred embodiments of the utility model in conjunction with the accompanying drawings to illustrate the technical solution of the utility model in detail. Here, the corresponding drawings will be provided to illustrate the utility model in detail. It should be noted that the preferred embodiments described herein are only for the purpose of illustrating and explaining the utility model and are not intended to limit or restrict the utility model.

[0017] like Figure 1 、 Figure 2、 Figure 3 As shown, a radial clearance measuring device for a complete set of cylindrical roller bearings with an outer diameter flange includes a measuring platform 5, a threaded rod 7, a positioning core shaft 8, a pressure plate 2, a rivet 6, a cam handle 1 and a micrometer 4. This device is not only suitable for a complete set of cylindrical roller bearings with an outer diameter flange, but also for standard cylindrical roller bearings without flanges.

[0018] The top surface of the measuring platform 5 is flat, with a flatness of no more than 1 μm. A recessed groove 5-2 is provided on the measuring platform 5, with a threaded hole 5-3 at the center of its bottom. A positioning mandrel 8 is provided with a clearance fit within the inner diameter of the inner ring of the bearing 3 being measured. A fixed block is provided at the bottom of the positioning mandrel 8, which mates with the recessed groove 5-2. The shape of the recessed groove 5-2 is not restricted and can be polygonal, circular, or other shapes. A circular shape is optimal for alignment, and the fixed block is also a corresponding circular shape. The height of the fixed block can vary from the depth of the recessed groove 5-2, but the bottom surface of the positioning mandrel 8, outside the fixed block, must be completely in contact with the top surface of the measuring platform 5 when the positioning mandrel 8 is installed within the recessed groove 5-2, ensuring stability. A through-hole 8-2 is provided at the axis of the positioning mandrel 8. One end of a threaded rod 7 passes through the clearance-fitting through-hole 8-2 and is then vertically fixed to the measuring platform 5 via the threaded hole 5-3. This means that the through-hole 8-2 and the threaded hole 5-3 are coaxial and have the same diameter. The other end of the threaded rod 7 is connected to the cam handle 1, which can be locked and unlocked, via a rivet 6. The cam handle 1 is rotatably fixed to the end of the threaded rod 7 via the rivet 6. The size and shape of the pressure plate 2 ensure that it can only press the inner ring without affecting other components. The cam handle 1 is locked when pressed down and unlocked when lifted up. The upper surface of the pressure plate 2 is provided with a through groove 2-1 and a crescent groove 2-2 that cooperates with the cam handle 1 and is coaxially connected. The through groove 2-1 is preferably configured as a U-shaped through groove to facilitate the fit of the threaded rod 7 when the pressure plate 2 is inserted from the side and pushed to the bottom. The radius of the crescent groove 2-2 is the same as the rotation radius of the cam handle 1, which facilitates the rotation of the cam handle 1. That is, when the cam handle 1 is in contact with the crescent groove 2-2, the center of the crescent groove 2-2 coincides with the rotation center of the cam handle 1. The relative position of the crescent groove 2-2 and the cam handle 1 can also be used to determine whether the threaded rod 7 has been rotated and moved down to its full position. The width of the through groove 2-1 is the same as the diameter of the threaded rod 7, which is used to fit the pressure plate 2 onto the threaded rod 7 and prevent the pressure plate 2 from shaking and shifting during the insertion process. When the cam handle 1 is locked, the cam handle 1 rotates in the crescent groove 2-2 to press the inner ring of the bearing 3 to be measured through the pressure plate 2. The tip of the micrometer 4 is set to contact the outer ring of the bearing 3 to be measured. The tip of the micrometer 4 is aligned in a direction perpendicular to the axial direction of the threaded rod 7. During the measurement process, the body of the micrometer 4 is fixed and only the tip will be subject to force changes.

[0019] Because the surface flatness of the measuring platform 5 and the bearing 3 under test is high, the two may be attracted to each other during measurement, making it inconvenient to remove the bearing 3 under test. A strip groove 5-1 extending outward from the sink 5-2 is provided on the upper surface of the measuring platform 5. Without affecting the flatness, an air channel connected to the outside is created between the measuring platform 5 and the bearing 3 under test, reducing suction and facilitating the removal of the bearing 3 under test.

[0020] There are two grooves 5-1, which are arranged in a cross form, and the center of the intersection is the sink 5-2. This structure is easy to open and is suitable for measuring bearings of various sizes. The surface of the measuring platform 5 changes little.

[0021] A chamfer 8-1 is provided on the upper side of the positioning core shaft 8 to facilitate the quick installation of the inner ring 3-1 of the bearing to be tested, thereby improving the detection efficiency.

[0022] The specific measurement process is as follows: During measurement, first install positioning spindle 8, install threaded rod 7 in threaded hole 5-3, lift cam handle 1, and fit the bearing 3 under test onto positioning spindle 8. Positioning spindle 8 has a chamfer 8-1 on its upper side, which guides the inner ring 3-1 of the bearing 3 under test for quick installation. Positioning spindle 8 also ensures that bearing 3 is installed in the same position for each measurement, ensuring measurement reliability. Then, press plate 2 against the end face of the bearing inner ring 3-1. The through groove 2-2 allows for quick installation and removal of the pressure plate 2, while the crescent groove 2-2 facilitates the rotation and positioning of cam handle 1. The position of cam handle 1 is adjusted by rotating threaded rod 7 (adjustment is required when measuring the first set of the same model bearings under test). Pressing cam handle 1 downward, tighten the inner ring 3-1. Manually push and pull the outer ring 3 several times along the direction of the micrometer indicator 4. The average change in the value on micrometer indicator 3 is the radial clearance. At the end of the measurement, lift cam handle 1, remove pressure plate 2, and remove the bearing 3 under test from above. The above are merely preferred embodiments of the present invention and are not intended to limit or restrict the present invention. Researchers or technicians in this field will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection claimed by the present invention.

Claims

1. A radial clearance measuring device for cylindrical roller bearings with outer diameter flanges, characterized by: The invention comprises a measuring platform (5), a threaded rod (7), a positioning mandrel (8), a pressure plate (2), a rivet (6), a cam handle (1) and a micrometer (4), wherein a sink groove (5-2) is provided on the measuring platform (5), a threaded hole (5-3) is provided at the bottom center of the sink groove (5-2), the positioning mandrel (8) is clearance-matched with the inner diameter of the inner ring of the measured bearing (3), a fixing block is provided at the bottom of the positioning mandrel (8) that matches the sink groove (5-2), a through hole (8-2) is provided at the axis of the positioning mandrel (8), one end of the threaded rod (7) passes through the clearance-matched through hole (8-2) and is vertically fixed to the measuring platform (5) through the threaded hole (5-3), and the other end of the threaded rod (7) is fixed to the measuring platform (5) through the threaded hole (5-3). One end is connected to the cam handle (1) through a rivet (6), and the upper surface of the pressure plate (2) is provided with a crescent groove (2-2) and a through groove (2-1) which are coaxially connected and arranged. The radius of the crescent groove (2-2) is the same as the rotation radius of the cam handle (1), and the groove width of the through groove (2-1) is the same as the diameter of the threaded rod (7). The pressure plate (2) is sleeved on the threaded rod (7). When the cam handle (1) is locked, the cam handle (1) rotates in the crescent groove (2-2) through the pressure plate (2) to press the inner ring of the measured bearing (3), and the tip of the micrometer (4) contacts the outer ring of the measured bearing (3). The tip of the micrometer (4) is aligned perpendicular to the axis direction of the threaded rod (7).

2. A radial clearance measuring device for cylindrical roller bearings with outer diameter flanges as claimed in claim 1, characterized in that: The upper surface of the measuring platform (5) is provided with a strip-shaped groove (5-1) extending outward from the sink (5-2).

3. The radial clearance measuring device for cylindrical roller bearings with outer diameter flanges as claimed in claim 2, characterized in that: The grooves (5-1) are provided with two and are arranged in a cross-shaped manner, with the center of the cross being the sink (5-2).

4. The radial clearance measuring device for cylindrical roller bearings with outer diameter flanges according to claim 1, characterized in that: The upper side of the positioning core shaft (8) is provided with a chamfer (8-1).

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