An on-line measuring test device for preload force of precision spindle bearings

Abstract

The present invention relates to the field of bearing testing, and particularly to an on-line measurement test device for the pre-tightening force of a precision spindle bearing. It includes a transmission device, a pre-tightening device and a host computer. The transmission device includes a housing, above which there is a main shaft. There is a first gear on the main shaft. At both ends of the main shaft located on the shaft shoulders, there are inner bearing rings. Outside the inner bearing rings, there are outer bearing rings. Above the housing at both ends of the main shaft, there are bearing seats. The pre-tightening device includes a support platform. Above the support platform, there is a screw fixing seat. Inside the screw fixing seat, there is a screw. There is an adjusting sleeve on the screw. Inside the adjusting sleeve, there is an annular electromagnet. Outside the annular electromagnet inside the adjusting sleeve, there is a wire groove. Inside the wire groove, there are wires. The host computer includes a storage compartment, and inside the storage compartment, there is a main unit. The present invention provides an on-line measurement test device for the pre-tightening force of a precision spindle bearing that can measure the magnitude of the pre-tightening force before installing the bearing, measure the vibration of the main shaft through an acceleration sensor, and at the same time facilitate the adjustment of the magnitude of the pre-tightening force.

Description

Technical Field

[0001] The present invention relates to the field of bearing testing, and in particular to an on-line measurement test device for the preload of a precision spindle bearing. Background Technique

[0002] Under most operating conditions, rolling bearings are used with appropriate clearances. Depending on the purpose, internal stress is also generated in the bearing during installation so that the bearing can be used under negative clearances. This method of use is called preloading. The main purpose of bearing preloading is to accurately position the shaft radially and axially while suppressing the shaft runout, improving the rotational accuracy, and increasing the stiffness, etc. The methods of bearing preloading are divided into two types: positioning preloading and constant-pressure preloading. During the tight assembly process, when installing the bearing, a preload needs to be provided to the outer ring with bolts or other parts to deform the balls and increase the rotational stability of the spindle. However, excessive preload will lead to abnormal heating, increased friction torque, decreased fatigue life, etc. Therefore, it is necessary to fully study the working conditions and preloading purposes to determine the preload. Summary of the Invention

[0003] The present invention provides an on-line measurement test device for the preload of a precision spindle bearing that can solve the problems in the background technique.

[0004] The technical solution provided by the present invention is an on-line measurement test device for the preload of a precision spindle bearing, which is characterized in that it includes a transmission device, a preloading device, and a host computer. The transmission device includes a housing, a spindle is provided above the housing, a first gear is provided on the spindle, bearing inner rings are provided at both ends of the spindle on the shoulders, a bearing outer ring is provided outside the bearing inner rings, and bearing seats are provided at both ends of the spindle above the housing. The preloading device includes a support table, a screw fixing seat is provided above the support table, a screw is provided inside the screw fixing seat, an adjusting sleeve is provided on the screw, an annular electromagnet is provided inside the adjusting sleeve, a wire groove is provided outside the annular electromagnet inside the adjusting sleeve, a wire is provided in the wire groove, and the host computer includes a storage compartment, and a host is provided inside the storage compartment.

[0005] A rotating handle is provided at one end of the outer side of the adjusting sleeve close to the screw fixing seat.

[0006] A data collector is provided on one side of the host, a keyboard is provided above the storage compartment, and a display is provided above the keyboard.

[0007] A first transmission shaft is provided inside the housing, a second transmission shaft is provided above the first transmission shaft inside the housing, and a motor is provided on one side of the housing. The output shaft of the motor is fixedly connected to the first transmission shaft.

[0008] A gear two is provided on the first transmission shaft, a gear three is provided on the second transmission shaft, a gear four is provided on the second transmission shaft on one side of the gear three, the gear two meshes with the gear three, and the gear four meshes with the gear one.

[0009] A measuring plate is provided on one side of the housing above the motor, an acceleration sensor module is provided on the measuring plate, the acceleration sensor module is slidably connected to the measuring plate, and a measuring sleeve is provided on one side of the acceleration sensor module.

[0010] The host computer is electrically connected to the data collector, and the data collector is electrically connected to the acceleration sensor module and the preloading device through electrical signals.

[0011] Advantages of the present invention:

[0012] The present invention provides a precision spindle bearing preloading force on-line measurement test device that can measure the magnitude of the preloading force before installing the bearing, measure the vibration of the spindle through an acceleration sensor, and facilitate the adjustment of the magnitude of the preloading force. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the overall structure of a precision spindle bearing preloading force on-line measurement test device of the present invention

[0014] Figure 2 It is a cross-sectional view of an adjusting sleeve of a precision spindle bearing preloading force on-line measurement test device of the present invention

[0015] Figure 3 It is a schematic diagram of the internal structure of the housing of a precision spindle bearing preloading force on-line measurement test device of the present invention

[0016] (1. Transmission device; 2. Preloading device; 3. Host computer; 4. Housing; 5. Spindle; 6. Inner ring of bearing; 7. Outer ring of bearing; 8. Bearing seat; 9. Support table; 10. Screw fixing seat; 11. Screw; 12. Adjusting sleeve; 13. Rotating handle; 14. Ring-shaped electromagnet; 15. Wire groove; 16. Wire; 17. Storage compartment; 18. Keyboard; 19. Display; 20. First transmission shaft; 21. Second transmission shaft; 22. Motor; 23. Gear two; 24. Gear three; 25. Gear four; 26. Gear one; 27. Measuring plate; 28. Acceleration sensor module; 29. Measuring sleeve) Detailed Embodiments

[0017] The present invention provides an on-line measurement test device for the preload of a precision spindle bearing as shown in the figure, which is characterized in that: it includes a transmission device 1, a preloading device 2 and a host computer 3. The transmission device 1 includes a housing 4. Above the housing 4, there is a main shaft 5. On the main shaft 5, there is a first gear 26. At both ends of the main shaft 5 located on the shaft shoulders, there are inner bearing rings 6. Outside the inner bearing rings 6, there are outer bearing rings 7. Above the housing 4 at both ends of the main shaft 5, there are bearing seats 8. The preloading device 2 includes a support platform 9. Above the support platform 9, there is a screw fixing seat 10. Inside the screw fixing seat 10, there is a screw 11. On the screw 11, there is an adjusting sleeve 12. Inside the adjusting sleeve 12, there is an annular electromagnet 14. Outside the annular electromagnet 14 inside the adjusting sleeve 12, there is a wire groove 15. Inside the wire groove 15, there is a wire 16. The host computer 3 includes a storage compartment 17. Inside the storage compartment 17, there is a main unit.

[0018] In the present invention, a rotating handle 13 is provided at one end of the outer side of the adjusting sleeve 12 close to the screw fixing seat 10.

[0019] In the present invention, a data collector is provided on one side of the main unit. Above the storage compartment 17, there is a keyboard 18. Above the keyboard 18, there is a display 19.

[0020] In the present invention, a first transmission shaft 20 is provided inside the housing 4. Above the first transmission shaft 20 inside the housing 4, there is a second transmission shaft 21. On one side of the housing 4, there is a motor 22. A fixed connection is provided between the output shaft of the motor 22 and the first transmission shaft 20.

[0021] In the present invention, a second gear 23 is provided on the first transmission shaft 20. A third gear 24 is provided on the second transmission shaft 21. On one side of the third gear 24 on the second transmission shaft 21, there is a fourth gear 25. The second gear 23 meshes with the third gear 24. The fourth gear 25 meshes with the first gear 26.

[0022] In the present invention, a measuring plate 27 is provided on one side of the housing 4 above the motor 22. An acceleration sensor module 28 is provided on the measuring plate 27. A sliding connection is provided between the acceleration sensor module 28 and the measuring plate 27. On one side of the acceleration sensor module 28, there is a measuring sleeve 29.

[0023] In the present invention, the host computer is electrically connected to the data collector, the data collector is electrically connected to the acceleration sensor module 28, and the data collector is electrically connected to the preloading device 2.

[0024] When the present invention is in use, first install the shaft and the bearing, rotate the rotating handle 13 to make the adjusting sleeve 12 fit with the bearing seat 8, connect the wire 16 to electricity, and adjust the pre-tightening force of the annular electromagnet 14 on the outer ring 7 of the bearing by adjusting the current magnitude. Then start the motor 22. The motor 22 drives through the drive shaft one 20 and the drive shaft two 21 whose bearings have been pre-tightened, driving the main shaft 5 to rotate. The measuring sleeve 29 can drive the acceleration sensor module 28 to move to measure the vibration of the bearing.

[0025] The above describes the present invention and its implementation manners. Such description is not restrictive. What is shown in the specific implementation manners is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the present invention, design similar structural manners and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. An on-line measuring test device for the pre-tightening force of a precision spindle bearing, characterized in that: It includes a transmission device (1), a pre-tightening device (2) and a host computer (3). The transmission device (1) includes a housing (4). Above the housing (4), there is a main shaft (5). On the main shaft (5), there is a first gear (26). At both ends of the main shaft (5) located on the shaft shoulders, there are inner bearing rings (6). Outside the inner bearing rings (6), there are outer bearing rings (7). Above the housing (4) at both ends of the main shaft (5), there are bearing seats (8). The pre-tightening device (2) includes a support table (9). Above the support table (9), there is a screw fixing seat (10). Inside the screw fixing seat (10), there is a screw (11). On the screw (11), there is an adjusting sleeve (12). Inside the adjusting sleeve (12), there is an annular electromagnet (14). Outside the annular electromagnet (14) inside the adjusting sleeve (12), there is a wire groove (15). Inside the wire groove (15), there is a wire (16). The host computer (3) includes a storage compartment (17). Inside the storage compartment (17), there is a main unit. When in use, the wire (16) is powered on, and the pre-tightening force of the annular electromagnet (14) on the outer bearing ring (7) is adjusted by adjusting the current magnitude.

2. An on-line measuring test device for the pre-tightening force of a precision spindle bearing according to claim 1, characterized in that: One end of the outer side of the adjusting sleeve (12) close to the screw fixing seat (10) is provided with a rotating handle (13).

3. An on-line measuring test device for the pre-tightening force of a precision spindle bearing according to claim 1, characterized in that: One side of the main unit is provided with a data collector. Above the storage compartment (17), there is a keyboard (18). Above the keyboard (18), there is a display (19).

4. An on-line measuring test device for the pre-tightening force of a precision spindle bearing according to claim 1, characterized in that: Inside the housing (4), there is a first transmission shaft (20). Above the first transmission shaft (20) inside the housing (4), there is a second transmission shaft (21). On one side of the housing (4), there is a motor (22). The output shaft of the motor (22) is fixedly connected to the first transmission shaft (20).

5. An on-line measuring test device for the pre-tightening force of a precision spindle bearing according to claim 4, characterized in that: On the first transmission shaft (20), there is a second gear (23). On the second transmission shaft (21), there is a third gear (24). On the second transmission shaft (21) on one side of the third gear (24), there is a fourth gear (25). The second gear (23) meshes with the third gear (24), and the fourth gear (25) meshes with the first gear (26).

6. An on-line measuring test device for the pre-tightening force of a precision spindle bearing according to claim 1, characterized in that: On one side of the housing (4) above the motor (22), there is a measuring plate (27). An acceleration sensor module (28) is provided on the measuring plate (27). The acceleration sensor module (28) is slidably connected to the measuring plate (27). On one side of the acceleration sensor module (28), there is a measuring sleeve (29).

7. An on-line measurement test device for the pre-tightening force of a precision spindle bearing according to claim 1, characterized in that: The host is electrically connected to the data collector, and the data collector is electrically connected to the acceleration sensor module (28), and the data collector is electrically connected to the pre-tightening device (2).

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