Bearing clearance measuring device

Abstract

The utility model relates to mechanical overhauls assembly fitter construction technical field, and specifically is a kind of bearing clearance measuring device, including jacking frame and dial gauge, jacking frame is placed in the bottom of rotating shaft for jacking rotating shaft, dial gauge includes table body and base, and table body is connected with base by support rod, and the measuring head of table body is movably connected with measuring rod.The utility model will dial gauge adsorbed on bearing end cover, then utilizes jacking frame to jacking rotating shaft and measures the moving distance of dial gauge measuring rod, its structure is simple, and it is flexible to operate, saves time, and bearing clearance detection construction efficiency is high, and measurement is accurate.

Description

Technical Field

[0001] This utility model relates to the field of mechanical repair, assembly, and fitter construction technology, specifically a bearing clearance measuring device. Background Technology

[0002] In the maintenance of rotating machinery, measuring bearing clearance is a crucial step in assessing bearing wear and determining whether replacement is necessary. Traditionally, rolling bearings are measured using the feeler gauge method for bearing clearance measurement.

[0003] Traditional methods for measuring bearing clearance typically employ the feeler gauge method for rolling bearings. This involves inserting feeler gauges of varying thicknesses into the gap between the bearing outer ring and the rolling elements, and judging the tightness of the feeler gauges by feel to determine the radial clearance. This method is easily influenced by the operator's experience and is prone to significant errors. For sliding bearings, the lead wire pressing method is commonly used. This involves removing the bearing cover and upper shell, placing a soft lead wire on the contact surface between the journal and the bearing shell, then reinstalling the bearing cover and tightening the bolts. The bolt pressure deforms the lead wire, and after a second disassembly, the thickness of the flattened lead wire is measured. The average value from multiple points is taken as the top clearance value. This method requires precise positioning of the lead wire; otherwise, it can easily lead to misalignment or breakage. Furthermore, repeated disassembly and reassembly involve bolt tightening and alignment adjustments, which can easily damage the mating surfaces or threaded connections. This makes maintenance work arduous, time-consuming, and impacts the overall maintenance cycle. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a bearing clearance measuring device that can directly measure bearing clearance, is simple to operate, and does not affect the maintenance cycle.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A bearing clearance measuring device includes a lifting frame and a dial indicator. The lifting frame is placed at the bottom of a rotating shaft for lifting the rotating shaft. The dial indicator includes a body and a base. The body is connected to the base via a support rod, and a measuring rod is movably connected to the measuring head of the body.

[0007] Compared with the prior art, the beneficial effects of this utility model are:

[0008] In this invention, a dial indicator is attached directly above the bearing end cover. Then, the measuring head of the dial indicator is placed directly above the rotating shaft, and the rotating shaft is lifted by a lifting frame. The top clearance of the bearing can then be measured. The operation is simple and flexible, saving time and effort, and reducing the difficulty of measuring bearing clearance.

[0009] Furthermore, the preferred embodiment adopted by this utility model is:

[0010] Preferably, the support rod includes a vertical adjustment rod and a horizontal adjustment rod. The lower end of the vertical adjustment rod is connected to the base, one end of the horizontal adjustment rod is connected to the vertical adjustment rod by a fastener one, and the dial indicator is connected to the other end of the horizontal adjustment rod by a fastener two.

[0011] Preferably, the vertical adjusting rod is a screw rod, and an adjusting nut is threaded onto the vertical adjusting rod, with the adjusting nut positioned below the first fastener.

[0012] Preferably, the lifting frame includes a lifting base and a lifting plate, and the lifting base and the lifting plate are connected by a lifting unit.

[0013] Preferably, the lifting unit includes a lifting screw and a lifting sleeve. The interior of the lifting base is a hollow structure. The lower end of the lifting screw extends to the inner wall of the lifting base and is rotatably connected to the lifting base. A drive shaft is rotatably mounted on one side of the lifting base. One end of the drive shaft extends into the interior of the lifting base and is connected to a drive bevel gear placed inside the lifting base. A driven bevel gear that meshes with the drive bevel gear is provided at the bottom of the lifting screw.

[0014] Preferably, the other end of the drive shaft extends to the outside of the lifting base and is connected to a handwheel outside the lifting base.

[0015] Preferably, the lifting unit is a jack. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the lifting frame structure used in this practical application;

[0018] Figure 3 This is a structural schematic diagram of fastener one;

[0019] Figure 4 This is a schematic diagram of the result for fastener two;

[0020] Figure 5 A schematic diagram of an embodiment of this utility model with an added adjusting screw;

[0021] Explanation of reference numerals in the attached diagram: 1. Rotating shaft; 2. Meter body; 3. Base; 4. Vertical support rod; 5. Horizontal support rod; 6. Fastener one; 7. Locking bolt one; 8. Fastener two; 9. Locking bolt two; 10. Fastener three; 11. Locking bolt three; 12. Measuring rod; 13. Magnetic switch; 14. Lifting base; 15. Lifting plate; 16. Lifting screw; 17. Lifting sleeve; 18. Handwheel; 19. Drive shaft; 20. Driven bevel gear; 21. Driven bevel gear; 22. Bearing; 23. Adjusting nut. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments. The purpose of this description is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0023] A bearing clearance measuring device consists of a lifting frame and a dial indicator. The lifting frame is placed at the bottom of the rotating shaft 1 to lift the rotating shaft 1, and the dial indicator is used to measure the clearance of the bearing 22.

[0024] The dial indicator consists of a body 2 and a base 3. The body 2 is connected to the base 3 via a support rod. The support rod consists of a vertical support rod 4 and a horizontal support rod 5. The lower end of the vertical support rod 4 is connected to the base 3.

[0025] A fastener 6 is provided at one end of the horizontal support rod 5. The horizontal support rod 5 is connected to the vertical support rod 4 through the fastener 6. A locking bolt 7 is provided on the fastener 6. The fastener 6 is locked to the vertical support rod 4 by the locking bolt 7. By operating the locking bolt 7, the fastener 6 can be rotated or moved up and down along the vertical support rod 4.

[0026] The transverse support rod 5 is also provided with a second fastener 8, and a second locking bolt 9 is provided on the second fastener 8. The second fastener 8 is fixed to the transverse support rod 5 by the second locking bolt 9. The second fastener 8 can be slid left and right along the transverse support rod 5 by operating the second locking bolt 9.

[0027] Fastener 3 10 is also provided on one side of fastener 2 8. Fastener 3 10 is provided with locking bolt 3 11. The dial indicator is fastened to fastener 3 10 by locking bolt 3 11. The dial indicator can be removed by adjusting locking bolt 3 11.

[0028] The dial indicator's measuring head has an external thread structure, and the upper end of the measuring rod 12 has an internal thread hole that matches the external thread structure. The dial indicator's measuring head is threadedly connected to the measuring rod 12.

[0029] In this embodiment, the lower end of the measuring rod 12 is set as a pointed tip, and the measuring rod 12 can be provided with multiple specifications of different lengths according to the size of the bearing 22.

[0030] In this embodiment, the base 3 is a magnetic watch holder, and a magnetic switch 13 is provided on the watch holder. The presence or absence of the magnetic force of the magnetic watch holder is controlled by the magnetic switch 13, so as to control its adsorption with the bearing 22.

[0031] The lifting frame is composed of a lifting base 14 and a lifting plate 15. The lifting base 14 and the lifting plate 15 are connected by a lifting unit. The lifting plate 15 is an arc-shaped plate. The lifting unit is connected by a lifting screw 16 and a lifting sleeve 17. The interior of the lifting base 14 is a hollow structure. The lower end of the lifting screw 16 extends into the interior of the lifting base 14 and is rotatably connected to the lifting base 14. A drive shaft 19 is rotatably mounted on one side of the lifting base 14. One end of the drive shaft 19 extends into the interior of the lifting base 14 and is connected to the drive bevel gear 20 inside the lifting base 14. The bottom of the lifting screw 16 is fixedly connected to a driven bevel gear 21 that meshes with the drive bevel gear 20. The other end of the drive shaft 19 extends to the outside of the lifting base 14 and is connected to a handwheel 18 on the outside of the lifting base 14.

[0032] In this embodiment, the lifting unit can also be replaced by a commercially available mechanical jack.

[0033] When using this device, place the dial indicator base directly above the bearing 22, and activate the magnetic switch 13 to allow the base 3 to adhere to the outer surface of the bearing 22. Connect the measuring rod 12 to the measuring head of the dial indicator, and then adjust the locking bolts 7 and 9 respectively so that the side of the measuring rod 12 is in close contact with the end face of the bearing 22, and the lower end of the measuring rod 12 is in contact with the rotating shaft 1. Then, calibrate the dial indicator to zero. Place the lifting frame at the bottom of the rotating shaft 1, and during measurement, place the measuring rod 12 on the same side as the lifting frame. By rotating the handwheel 18, the lifting plate 15 is raised. As the lifting plate 15 rises, it lifts the rotating shaft 1. The difference in the value of the movement of the dial indicator measuring rod 12 after being squeezed by the rotating shaft 1 is the bearing 22 clearance at the measurement position. After measuring one side of bearing 22, turn the handwheel 18 in the opposite direction to reset the rotating shaft 1. Then, adjust the locking bolt 7 to move the horizontal support rod 5 upward (to prevent bearing 22 from interfering with the dial indicator measuring rod 12 during rotation) and rotate it 180° around the vertical support rod 4. Rotate the dial indicator to the other side of bearing 22 and, following the above steps, place the side of the measuring rod 12 against the end face of bearing 22 on that side, and make the lower end of the measuring rod 12 contact the rotating shaft 1. Then, calibrate the dial indicator to zero, move the lifting frame to the same side as the measuring rod 12, and then turn the handwheel 18 to lift the rotating shaft 1 on that side. The difference in the value of the movement of the dial indicator measuring rod 12 after being squeezed by the rotating shaft 1 is the bearing 22 clearance at the measurement position. The average value of the two measurement results is the bearing 22 top clearance.

[0034] Based on the above embodiments, the vertical support rod 4 can also be set as a screw rod, with an adjusting nut 23 threadedly connected to the vertical support rod 4. The adjusting nut 23 is placed below the fastener 6. The fastener 6 can be finely adjusted by adjusting the adjusting nut 23, thereby achieving fine adjustment of the dial indicator measuring rod 12, so as to facilitate the adjustment of the distance between the lower end of the measuring rod 12 and the rotating shaft 1.

[0035] This invention has a simple structure, enables rapid measurement of bearing clearance, simplifies the measurement process, and improves measurement accuracy by averaging the bearing clearance measurements at both ends of the bearing.

[0036] The above description is merely a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A bearing clearance measuring device, characterized in that: It includes a lifting frame and a dial indicator. The lifting frame is placed at the bottom of the rotating shaft for lifting the shaft. The dial indicator includes a body and a base. The body is connected to the base via a support rod, and the measuring head of the body is movably connected to a measuring rod.

2. The bearing clearance measuring device according to claim 1, characterized in that: The support rod includes a vertical adjustment rod and a horizontal adjustment rod. The lower end of the vertical adjustment rod is connected to the base, and one end of the horizontal adjustment rod is connected to the vertical adjustment rod through fastener one. The dial indicator is connected to the other end of the horizontal adjustment rod through fastener two.

3. The bearing clearance measuring device according to claim 2, characterized in that: The vertical adjusting rod is a screw rod, and an adjusting nut is threaded onto the vertical adjusting rod. The adjusting nut is located below the first fastener.

4. The bearing clearance measuring device according to claim 1, characterized in that: The lifting frame includes a lifting base and a lifting plate, and the lifting base and the lifting plate are connected by a lifting unit.

5. The bearing clearance measuring device according to claim 4, characterized in that: The lifting unit includes a lifting screw and a lifting sleeve. The interior of the lifting base is a hollow structure. The lower end of the lifting screw extends to the inner wall of the lifting base and is rotatably connected to the lifting base. A drive shaft is rotatably mounted on one side of the lifting base. One end of the drive shaft extends into the interior of the lifting base and is connected to a drive bevel gear located inside the lifting base. A driven bevel gear that meshes with the drive bevel gear is provided at the bottom of the lifting screw.

6. The bearing clearance measuring device according to claim 5, characterized in that: The other end of the drive shaft extends to the outside of the lifting base and connects to a handwheel on the outside of the lifting base.

7. The bearing clearance measuring device according to claim 4, characterized in that: The lifting unit is a jack.

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