A device for detecting coaxiality of bearing holes on both sides of a guide wheel

Abstract

This utility model provides a device for detecting the coaxiality of bearing holes on both sides of a guide wheel, including a base, a mandrel, a shrink sleeve, a locking bolt, a butterfly spring, and a dial indicator. The mandrel is horizontally and rotatably mounted on the base, and its exposed end has a truncated cone with a threaded hole at its center. The shrink sleeve is a sleeve with an expansion joint that matches the truncated cone and is fitted onto the mandrel. A through hole is provided at the outer end of the shrink sleeve corresponding to the threaded hole. The locking bolt, in conjunction with the butterfly spring, presses and fixes the shrink sleeve to the mandrel, causing it to deform uniformly and increase in diameter to tension the inner wall of the bearing hole on one side of the guide wheel. The dial indicator is a separate tool used to detect the coaxiality of the bearing hole on the other side of the guide wheel. This detection device can be used to detect the coaxiality of bearing holes on both sides of a guide wheel and is easy to use and efficient.

Description

Technical Field

[0001] This utility model relates to the production and manufacturing of guide wheels, specifically, to a device for detecting the coaxiality of bearing holes on both sides of a guide wheel. Background Technology

[0002] Before leaving the factory, the guide wheel needs to undergo coaxiality testing. This testing mainly includes testing the coaxiality of the bearing holes on both sides of the snap ring groove inside the guide wheel.

[0003] The current inspection method involves using a clamping and fixing structure after the machine tool is processed, and then using a dial indicator to check the coaxiality of the bearing holes on both sides. However, due to the limitations of the clamping and fixing structure, the inspection space is limited, the inspection process is cumbersome, the operation is slightly difficult, and if the sampling frequency is too high, it will affect the efficiency of part processing.

[0004] Currently, the mainstream coaxiality testing devices on the market are mainly used for coaxiality testing of inner holes and outer circles. For example, the testing device provided by the utility model patent with application number 202021476170.4, entitled "A Coaxiality Testing Device for the Outer or Inner Ring of a Bearing", cannot be applied to the coaxiality testing of inner holes on both sides.

[0005] To solve the technical problems faced in this application, it is necessary to develop a simple and easy-to-use special device that can detect the coaxiality of the bearing holes on both sides of the guide wheel. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing an easy-to-use and efficient device for detecting the coaxiality of bearing holes on both sides of a guide wheel.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: a device for detecting the coaxiality of bearing holes on both sides of a guide wheel, comprising a base, a spindle, a sleeve, a locking bolt, a disc spring, and a dial indicator;

[0008] The mandrel is horizontally and rotatably mounted on the base, and the exposed end of the mandrel is provided with a truncated cone, with a screw hole at the center of the truncated cone;

[0009] The expansion sleeve is an expansion sleeve with an expansion joint that matches the truncated cone. The expansion sleeve is used to fit onto the mandrel, and a through hole is left at the outer end of the expansion sleeve corresponding to the screw hole.

[0010] The locking bolt, in conjunction with the disc spring, is used to press and fix the expansion sleeve onto the mandrel, so that the expansion sleeve deforms uniformly and its diameter increases to the inner wall of the bearing hole on one side of the tension guide wheel;

[0011] The dial indicator is a separate tool used to check the coaxiality of the bearing hole on the other side of the guide wheel.

[0012] Based on the above, the base is provided with a horizontal bearing hole corresponding to the mandrel, and a spacer is provided in the bearing hole for installing at least two bearings. The inner end of the mandrel is installed in the bearing hole through at least two bearings and a matching elastic retaining ring.

[0013] Based on the above, a shoulder is provided between the inner end and the exposed end of the mandrel, and the diameter of the shoulder is larger than the diameter of the inner end and the exposed end of the mandrel.

[0014] Based on the above, the inner hole of the expansion sleeve is a tapered hole, and the outer circumferential surface is a circular surface parallel to the axis of the mandrel.

[0015] Based on the above, the expansion joints on the expansion sleeve include a first expansion joint and a second expansion joint. The opening of the first expansion joint is located at the open end of the expansion sleeve, and the opening of the second expansion joint is located at the perforation. The first expansion joint and the second expansion joint are distributed alternately at equal intervals.

[0016] Based on the above, the disc spring is installed between the expansion sleeve and the spindle.

[0017] As described above, a gasket is provided between the locking bolt and the expansion sleeve.

[0018] Based on the above, the elastic retaining ring includes a shaft elastic retaining ring and a hole elastic retaining ring for use in conjunction.

[0019] Based on the above, the non-open end of the expansion sleeve is provided with a chamfer.

[0020] Based on the above, an annular groove is provided at the shoulder of the mandrel corresponding to the expansion sleeve.

[0021] This utility model has substantial features and progress compared to the prior art. Specifically, this utility model utilizes a special tool to tighten the bearing hole on one side of the guide wheel, keeping the bearing hole on that side coaxial with the mandrel. Then, a dial indicator is used in conjunction with rotating the mandrel to detect the coaxiality of the bearing hole on the other side of the guide wheel. The detection efficiency is significantly improved, and the operation is relatively simpler, meeting the current demand for efficient detection of the coaxiality of the bearing holes on both sides of the guide wheel. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structural principle of the device for detecting the coaxiality of the bearing holes on both sides of the guide wheel in this utility model.

[0023] Figure 2 This is a schematic diagram of the spindle structure of the coaxiality detection device for the bearing holes on both sides of the guide wheel in this utility model.

[0024] Figure 3 This is one of the structural schematic diagrams of the expansion sleeve in this utility model.

[0025] Figure 4 This is the second schematic diagram of the expansion sleeve in this utility model.

[0026] In the diagram: 1. Base; 2. Mandrel; 3. Expansion sleeve; 4. Locking bolt; 5. Disc spring; 6. Guide wheel; 7. Bearing; 8. Shaft retaining ring; 9. Hole retaining ring; 10. Washer; 11. Bearing hole; 21. Frustum; 22. Screw hole; 23. Shoulder; 24. Annular groove; 31. First expansion joint; 32. Second expansion joint; 33. Through hole; 34. Chamfer. Detailed Implementation

[0027] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0028] like Figures 1-4 As shown, a device for detecting the coaxiality of bearing holes on both sides of a guide wheel includes a base 1, a spindle 2, a sleeve 3, a locking bolt 4, a disc spring 5, and a dial indicator (not shown in the figure).

[0029] The mandrel 2 is horizontally and rotatably mounted on the base 1. The exposed end of the mandrel 2 is provided with a truncated cone 21. A screw hole 22 is provided at the center of the truncated cone 21. The inner end of the mandrel 2 is the mounting end. It is installed in the bearing hole 11 of the base 1 through two bearings 7, a spacer 5, a set of shaft retaining rings 8 and hole retaining rings 9.

[0030] Specifically, in this embodiment, a shoulder 23 is provided between the inner end and the exposed end of the mandrel 2. The diameter of the shoulder 23 is larger than the diameter of the inner end and the exposed end of the mandrel. On the exposed end side of the shoulder 23, an annular groove 24 is provided corresponding to the expansion sleeve. When the expansion sleeve 3 is pressed inward, the inner end of the expansion sleeve 3 enters the annular groove 24, providing space for the movement of the expansion sleeve 3.

[0031] The expansion sleeve 3 is an expansion sleeve with an expansion joint that matches the cone 21. The outer end of the expansion sleeve 3 has a through hole 33 at the position corresponding to the screw hole 22. Specifically, in this embodiment, the inner hole of the expansion sleeve 3 is a conical hole, and the outer circumferential surface is a circular surface parallel to the axis of the mandrel. The expansion joint on the expansion sleeve includes a first expansion joint 31 and a second expansion joint 32. The opening of the first expansion joint 31 is located at the open end of the expansion sleeve, and the opening of the second expansion joint 32 is located at the through hole 33. The first expansion joint 31 and the second expansion joint 32 are equally spaced and alternately distributed. The non-open end of the expansion sleeve 3 is provided with a chamfer 34 to facilitate the installation of the guide wheel 6.

[0032] The locking bolt 4, in conjunction with the butterfly spring 5, is used to press and fix the expansion sleeve 3 onto the mandrel 2, so that the expansion sleeve 3 deforms uniformly, increasing its diameter to the inner wall of the bearing hole on one side of the tension guide wheel 6. Specifically, in this embodiment, the butterfly spring 5 is installed between the expansion sleeve 3 and the mandrel 2 to provide a restoring elastic force, and a washer 10 is provided between the locking bolt 4 and the expansion sleeve 3 to prevent loosening.

[0033] The dial indicator is a separate tool used to check the coaxiality of the bearing hole on the other side of the guide wheel.

[0034] Working principle explanation:

[0035] In the standby state, loosen the locking bolt 4 to reset the expansion sleeve 3 to a relatively small diameter, and wait for the guide wheel 6 to be installed.

[0036] When coaxiality testing is required, take the guide wheel 6 to be tested, put it on the outside of the expansion sleeve 3, and then tighten the locking bolt 4, while ensuring that the guide wheel 6 remains horizontal.

[0037] As the twisting action continues, the difference in depth between the taper of the outer surface of the spindle 2 and the taper of the inner surface of the expansion sleeve 3 is used to increase the outer diameter of the expansion sleeve, thereby tightening the inner wall of the bearing hole on one side of the guide wheel 6.

[0038] Take a dial indicator, rotate the mandrel 2, and according to the dial indicator's testing procedure, test the runout of the bearing hole on the other side of the guide wheel 6 to reflect the coaxiality.

[0039] After the test is completed, loosen the locking bolt 4. The expansion sleeve 3 will reset under the action of the disc spring 10 and move away from the spindle 2, thereby releasing the guide wheel 6 so that the next guide wheel can be tested.

[0040] The process is relatively simple to operate, highly efficient, and will not damage the roughness of the inner hole. By adjusting the expansion sleeve 3, it can also adapt to the inspection of inner holes of various sizes.

[0041] Finally, it should be noted that: the preferred embodiments of this patent have been described in detail above, but this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A device for detecting the coaxiality of bearing holes on both sides of a guide wheel, characterized in that: Includes base, spindle, expansion sleeve, locking bolt, disc spring and dial indicator; The mandrel is horizontally and rotatably mounted on the base, and the exposed end of the mandrel is provided with a truncated cone, with a screw hole at the center of the truncated cone; The expansion sleeve is an expansion sleeve with an expansion joint that matches the truncated cone. The expansion sleeve is used to fit onto the mandrel, and a through hole is left at the outer end of the expansion sleeve corresponding to the screw hole. The locking bolt, in conjunction with the disc spring, is used to press and fix the expansion sleeve onto the mandrel, so that the expansion sleeve deforms uniformly and its diameter increases to the inner wall of the bearing hole on one side of the tension guide wheel; The dial indicator is a separate tool used to check the coaxiality of the bearing hole on the other side of the guide wheel.

2. The device for detecting the coaxiality of bearing holes on both sides of the guide wheel according to claim 1, characterized in that: The base has a horizontal bearing hole corresponding to the mandrel. A spacer is provided in the bearing hole for installing at least two bearings. The inner end of the mandrel is installed in the bearing hole through at least two bearings and a matching elastic retaining ring.

3. The device for detecting the coaxiality of bearing holes on both sides of the guide wheel according to claim 2, characterized in that: A shoulder is provided between the inner end and the exposed end of the mandrel, and the diameter of the shoulder is larger than the diameter of the inner end and the exposed end of the mandrel.

4. The device for detecting the coaxiality of bearing holes on both sides of the guide wheel according to claim 3, characterized in that: The inner hole of the expansion sleeve is a tapered hole, and the outer circumferential surface is a circular surface parallel to the axis of the mandrel.

5. The device for detecting the coaxiality of bearing holes on both sides of the guide wheel according to claim 4, characterized in that: The expansion joints on the expansion sleeve include a first expansion joint and a second expansion joint. The opening of the first expansion joint is located at the open end of the expansion sleeve, and the opening of the second expansion joint is located at the perforation. The first expansion joint and the second expansion joint are distributed alternately at equal intervals.

6. The device for detecting the coaxiality of bearing holes on both sides of the guide wheel according to claim 5, characterized in that: The disc spring is installed between the expansion sleeve and the mandrel.

7. The device for detecting the coaxiality of bearing holes on both sides of the guide wheel according to claim 6, characterized in that: A gasket is provided between the locking bolt and the expansion sleeve.

8. The device for detecting the coaxiality of bearing holes on both sides of the guide wheel according to claim 7, characterized in that: The elastic retaining rings include matching elastic retaining rings for shafts and elastic retaining rings for holes.

9. The device for detecting the coaxiality of bearing holes on both sides of the guide wheel according to claim 8, characterized in that: The non-open end of the expansion sleeve is chamfered.

10. The device for detecting the coaxiality of bearing holes on both sides of the guide wheel according to claim 9, characterized in that: The mandrel has an annular groove at the shoulder corresponding to the expansion sleeve.

Images