Measuring device for axial clearance of tapered roller bearing

Abstract

The utility model relates to a device for measuring the axial clearance of a tapered roller bearing. The device comprises a main frame, a lifting component, a force measuring component, a rotary rotating component, a laser ranging component and a hollow shaft workpiece, the lifting part comprises a screw lifter and a first motor, and the first motor is connected with the screw lifter; the force measuring component is connected with the screw elevator and the rotary rotating component; the laser ranging component is mounted on one side of the rotary rotating component; the hollow shaft workpiece comprises a hollow shaft and a shell, the tapered roller bearing is in interference fit with the hollow shaft and a bearing chamber of the shell, and the rotary part is connected with the hollow shaft. Compared with the prior art, the utility model has the advantages that: the screw lifter is adopted to control lifting, and the force measuring component detects the load, so that an accurate clearance value can be obtained; a two-force connecting component is adopted, no other external force is applied except for constraining force, and the lifting pulling force can be directly measured by the gravity sensor conveniently; and a thrust bearing connecting piece is adopted, so that reverse torque generated during rotation of the bolt is reduced, and the like.

Description

Technical Field

[0001] The utility model relates to bearing clearance measurement, in particular to a measuring device for the axial clearance of a tapered roller bearing. Background Art

[0002] The bearing clearance is the amount of movement when the inner ring or outer ring of the bearing is fixed when it is not installed on the shaft or bearing box, and the unfixed side is moved radially or axially. According to the direction of movement, it can be divided into radial clearance and axial clearance. The size of the clearance during the operation of the bearing affects the rolling fatigue life, temperature rise, noise, vibration and other performance of the bearing, so it is necessary to accurately measure the bearing clearance.

[0003] After searching, the application publication number CN101968339A discloses an automatic measuring instrument for the axial clearance of tapered roller bearings of automobile gearboxes, which specifically discloses: a frame, a workbench, a lower outer pedestal, a lower rotating shaft, a lower inner pedestal, a belt passive pulley, a steel ball, a speed regulating motor, a belt driving pulley, a belt, a tensioning assembly, a load hanging plate, a lower load frame movable up and down, a load rod, a load, a measuring hanging plate, a meter clamp, an inductive probe, a measuring lever, a bracket, a connecting plate, a clamping cylinder, a bearing sleeve, a moving plate, a gantry, a guide rod, a pressurizing cylinder, an upper outer pedestal, an upper outer pedestal, an upper rotating shaft, an upper inner pedestal, an air path system, and an electrical control box, which ensures the safety and reliability of the bearing by controlling the accuracy of the axial clearance of the speed change bearing box bearing.

[0004] However, the prior art uses cylinder pressure regulation to achieve load requirements, and the unstable cylinder pressure will affect the measured value; the clearance value is detected by lever weight quantitative and spring matching, and the accuracy is not high. Therefore, how to design a measurement device with high clearance value detection accuracy is a technical problem that needs to be solved. Utility Model Content

[0005] The purpose of the utility model is to provide a measuring device for the axial clearance of a tapered roller bearing in order to overcome the defect of low bearing clearance measuring accuracy in the above-mentioned prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] According to one aspect of the utility model, a device for measuring the axial clearance of a tapered roller bearing is provided, comprising a main frame, a lifting component installed on the main frame, and a force measuring component, a rotary rotating component, a laser ranging component and a hollow shaft workpiece installed in the main frame; the lifting component comprises a screw elevator and a first motor, and the output shaft of the first motor is connected to the screw elevator; one end of the force measuring component is connected to the screw elevator, and the other end is connected to the rotary rotating component; the laser ranging component is installed on one side of the rotary rotating component; the hollow shaft workpiece comprises a hollow shaft and a shell, the tapered roller bearing is interference-mounted with the bearing chamber of the hollow shaft and the shell, and the rotary rotating component is connected to the hollow shaft.

[0008] As a preferred technical solution, the lifting component is fixedly connected to the main frame by bolts, the lifting platform of the screw lift extends into the main frame, and the first motor is a variable frequency reduction motor.

[0009] As a preferred technical solution, the force measuring component includes an end face connector, a two-force connecting component and a thrust bearing connector. The end face connector is connected to the lifting component on one side and connected to the two-force connecting component on the other side. The two-force connecting component is connected to the thrust bearing connector.

[0010] As a preferred technical solution, the two-force connecting component includes a joint bearing, a connecting shaft and a gravity sensor. There are two joint bearings and two connecting shafts, and one joint bearing is installed on one connecting shaft; the two joint bearings are respectively connected to the two ends of the gravity sensor.

[0011] As a preferred technical solution, the thrust bearing connector includes a first shell, a second shell, a connecting seat, a thrust bearing and an adapter shaft. The first shell and the second shell are fixedly connected. A sliding chamber is provided in the first shell. The connecting seat and the sliding chamber form a moving pair. A bearing chamber is provided in the second shell. The thrust bearing is sleeved on the adapter shaft and installed in the bearing chamber.

[0012] As a preferred technical solution, the thrust bearing connector further comprises a bearing cover, and the bearing cover is pressed on one end of the thrust bearing close to the first housing.

[0013] As a preferred technical solution, the end of the adapter shaft away from the thrust bearing is provided with a thread and connected to the rotary component.

[0014] As a preferred technical solution, the first shell and the second shell are fixedly connected by bolts.

[0015] As a preferred technical solution, the rotating component includes a second motor, a driving gear and a driven gear, the output shaft of the second motor is connected to the driving gear, the driving gear cooperates with the driven gear, the driven gear is installed on the end face of the hollow shaft, and the force measuring component is connected to the driven gear.

[0016] As a preferred technical solution, the laser distance measuring component includes a bracket and a distance sensor. The bracket is installed on one side of the rotating component. The distance sensor is installed on the bracket and is 5 to 10 mm away from the end face of the driven gear close to the force measuring component.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1) The lifting component of the utility model adopts a screw lifter to control the lifting and lowering, and the force measuring component detects the load size, which can obtain an accurate clearance value with high precision; the screw lifter is powered by a variable frequency reduction motor to further improve the precision;

[0019] 2) The force measuring component of the utility model adopts two force connecting components, with joint bearings at both ends, which can make the direction of the restraining reaction force uncertain, so that it is always in a balanced state, and is not subject to any other external force except the restraining force, and gravity is ignored, so that the gravity sensor can directly measure the lifting tension;

[0020] 3) The force measuring component of the utility model adopts a thrust bearing connector, which not only satisfies the axial movement during the installation process, but also keeps the stressed connecting shaft stationary under the axial load state, thereby reducing the reverse torque generated when the fixing bolts rotate;

[0021] 4) The utility model is compatible with and meets the requirements for measuring the axial clearance of high-speed shaft tapered bearings and spline shaft tapered bearings of mass-produced machines, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a device for measuring the axial clearance of a tapered roller bearing according to the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the lifting component of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the force measuring component of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the end face connector of the utility model;

[0026] Figure 5 This is a cross-sectional view of a two-force connecting component of the utility model;

[0027] Figure 6This is a schematic diagram of the connecting shaft structure of the utility model;

[0028] Figure 7 This is a cross-sectional view of the thrust bearing connector of the utility model;

[0029] Figure 8 This is a schematic diagram of the structure of the connecting seat of the utility model;

[0030] Fig. 9 This is a schematic diagram of the first shell structure of the utility model;

[0031] Fig.10 This is a schematic diagram of the second housing structure of the utility model;

[0032] Fig.11 This is a schematic diagram of the bearing gland structure of the utility model;

[0033] Fig.12 This is a schematic diagram of the structure of the transfer shaft of the utility model;

[0034] Fig.13 This is a schematic diagram of the structure of the rotary rotating component of the utility model;

[0035] Fig.14 This is a schematic diagram of the structure of the laser distance measuring component of the utility model;

[0036] Fig.15 This is a cross-sectional view of a hollow shaft workpiece of the utility model;

[0037] The numbers in the figure show:

[0038] 1. Main frame, 2. Lifting component, 20. Screw lift, 21. First motor, 3. Force measuring component, 30. End face connector, 31. Two-force connecting component, 310. Spherical bearing, 311. Connecting shaft, 312. Gravity sensor, 32. Thrust bearing connector, 320. First housing, 3200. Sliding chamber, 321. Second housing, 3210. Bearing chamber, 322. Connecting seat, 323. Thrust bearing, 324. Adapter shaft, 325. Bearing cover, 4. Rotating component, 40. Second motor, 41. Driving gear, 42. Driven gear, 5. Laser ranging component, 50. Bracket, 51. Distance sensor, 6. Hollow shaft workpiece, 60. Hollow shaft, 61. Housing, 7. Tapered roller bearing DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0040] like Figure 1 As shown, the utility model provides a measuring device for the axial clearance of a tapered roller bearing, comprising a main frame 1, a lifting component 2, a force measuring component 3, a rotary component 4, a laser distance measuring component 5 and a hollow shaft workpiece 6.

[0041] The main frame 1 is made of Q355B low alloy I-beam, which is finely processed after welding and used to install other components.

[0042] like Figure 2 As shown, the lifting component 2 is fixed on the main frame 1 with bolts, and includes a screw lift 20 and a first motor 21. The output shaft of the first motor 21 is connected to the screw lift 20 to provide power for the screw lift 20. The lifting platform of the screw lift 20 goes deep into the main frame 1 and is connected to the force measuring component 3 through the end face connector 30. The first motor 21 uses a variable frequency reduction motor.

[0043] like Figure 3 As shown, the force measuring component 3 includes an end surface connecting member 30 , a second force connecting member 31 and a thrust bearing connecting member 32 .

[0044] like Figure 4 As shown, a connection hole is opened on the end surface connection member 30, and is connected to the lifting component 2 through the connection hole.

[0045] like Figure 5 and Figure 6 As shown, the two-force connecting member 31 includes a joint bearing 310, a connecting shaft 311 and a gravity sensor 312. There are two joint bearings 310 and two connecting shafts 311, and one joint bearing 310 is installed on one connecting shaft 311; the two joint bearings 310 are respectively connected to one end of the gravity sensor 312. The two ends of the two-force connecting member 31 are joint bearings 310 and the connection method is hinged, which can make the direction of the constraint reaction force uncertain and keep it in a balanced state; except for the constraint force, it is not subject to any other external force, and gravity is not taken into account, which is convenient for the gravity sensor 312 to detect the lifting force.

[0046] like Figure 7 As shown, the thrust bearing connector 32 includes a first housing 320 , a second housing 321 , a connecting seat 322 , a thrust bearing 323 and an adapter shaft 324 .

[0047] like Figure 8 As shown, the connecting seat 322 is used to connect the two force connecting components 31 and the thrust bearing connecting member 32.

[0048] like Figures 9 to 11 As shown, the first housing 320 and the second housing 321 are connected by bolts, and a sliding chamber 3200 is provided in the first housing 320. The connection seat 322 and the sliding chamber 3200 can move axially and rotate around the axis. A bearing chamber 3210 is provided in the second housing 321. The thrust bearing 323 is sleeved on the adapter shaft 324 and installed in the bearing chamber 3210. The bearing pressure cover 325 is pressed on one end of the thrust bearing 323 close to the first housing 320. The bearing pressure cover 325 limits the thrust bearing 323 and the adapter shaft 324 with a small gap to ensure free rotation. The inner ring of the thrust bearing 323 contacts the adapter shaft 324, and the other side contacts the second housing 321. The axial movement during the installation process is satisfied, and the connecting shaft 311 is kept stationary under the state of axial load, reducing the reverse torque when the fixing bolt rotates.

[0049] like Fig.12 As shown, the adapter shaft 324 is installed in the thrust bearing 323, one end of which is clamped in the inner ring of the bearing, and the other end is provided with a thread and is threadedly connected to the rotary component 4.

[0050] like Fig.13 As shown, the rotary component 4 includes a second motor 40, a driving gear 41 and a driven gear 42. The second motor 40 is a servo motor. The output shaft of the second motor 40 is connected to the driving gear 41. The driving gear 41 and the driven gear 42 are matched. The driven gear 42 is installed on the end face of the hollow shaft 60 and presses the inner ring of the tapered roller shaft 7 to be measured. The adapter shaft 324 of the force measuring component 3 is connected to the driven gear 42.

[0051] like Fig.14 As shown, the laser distance measuring component 5 includes a bracket 50 and a distance sensor 51. The bracket 50 is a T-slot aluminum alloy bracket 50, which is installed on one side of the rotary rotating component 4. The distance sensor 51 is installed on the bracket 50 and can move up and down along the T-slot to ensure that the straight-line distance between the distance sensor 51 and the end face of the driven gear 42 close to the force measuring component 3 is 5 to 10 mm, thereby ensuring the detection distance of the distance sensor 51.

[0052] like Fig.15 As shown, the hollow shaft workpiece 6 includes a hollow shaft 60 and a shell 61 , a bearing chamber 3210 is provided in the shell 61 , the bearing chamber 3210 , the tapered roller bearing 7 and the hollow shaft 60 are interference fitted, and the driven gear 42 of the rotary rotating component 4 is installed on the hollow shaft 60 .

[0053] The working process of this utility model is as follows:

[0054] After the power is turned on, it starts after resetting. At this time, the hollow shaft is not subjected to tension. The lifting component 2 moves, and the gravity sensor 312 and the distance sensor 51 read the value synchronously. After the tension reaches the specified value, the action stops and keeps on. The distance sensor 51 records the value. The second motor 40 starts to rotate (N turns forward and N turns reversed), and after the rotation, the distance sensor 51 reads and records the first set of data evenly distributed in multiple positions within one rotation. The hollow shaft is subjected to tension. After the tension reaches the specified value, the action stops and keeps on. The second motor 40 starts to rotate (N turns forward and N turns reversed), and after the rotation, the distance sensor 51 reads and records the second set of data evenly distributed in multiple positions within one rotation. The absolute value after subtracting the first set of data from the second set of data is averaged, and this value is the clearance value. (Before turning on the power for measurement, pull once with the maximum tension, check that all connecting parts including bearings are installed in place, rotate for a while, and start measuring after the temperature of the electrical components stabilizes.)

[0055] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A device for measuring the axial clearance of a tapered roller bearing, characterized in that: The invention comprises a main frame (1), a lifting component (2) installed on the main frame (1), a force measuring component (3) installed in the main frame (1), a rotary rotating component (4), a laser distance measuring component (5) and a hollow shaft workpiece (6); the lifting component (2) comprises a screw elevator (20) and a first motor (21), and the output shaft of the first motor (21) is connected to the screw elevator (20); one end of the force measuring component (3) is connected to the screw elevator (20), and the other end is connected to the rotary rotating component (4); the laser distance measuring component (5) is installed on one side of the rotary rotating component (4); the hollow shaft workpiece (6) comprises a hollow shaft (60) and a shell (61), the tapered roller bearing (7) is interference-fitted with the bearing chamber (3210) of the hollow shaft (60) and the shell (61), and the rotary rotating component (4) is connected to the hollow shaft (60).

2. A device for measuring the axial clearance of a tapered roller bearing according to claim 1, characterized in that: The lifting component (2) is fixedly connected to the main frame (1) by bolts, the lifting platform of the screw lift (20) extends into the main frame (1), and the first motor (21) is a variable frequency reduction motor.

3. The device for measuring the axial clearance of a tapered roller bearing according to claim 1, characterized in that: The force measuring component (3) comprises an end face connecting piece (30), a two-force connecting component (31) and a thrust bearing connecting piece (32); one side of the end face connecting piece (30) is connected to the lifting component (2) and the other side is connected to the two-force connecting component (31); the two-force connecting component (31) is connected to the thrust bearing connecting piece (32).

4. A device for measuring the axial clearance of a tapered roller bearing according to claim 3, characterized in that: The two-force connecting component (31) comprises a joint bearing (310), a connecting shaft (311) and a gravity sensor (312); there are two joint bearings (310) and two connecting shafts (311), and one joint bearing (310) is installed on one connecting shaft (311); the two joint bearings (310) are respectively connected to two ends of the gravity sensor (312).

5. The device for measuring the axial clearance of a tapered roller bearing according to claim 3, characterized in that: The thrust bearing connector (32) comprises a first shell (320), a second shell (321), a connecting seat (322), a thrust bearing (323) and an adapter shaft (324); the first shell (320) and the second shell (321) are fixedly connected; a sliding chamber (3200) is provided in the first shell (320); the connecting seat (322) and the sliding chamber (3200) form a moving pair; a bearing chamber (3210) is provided in the second shell (321); the thrust bearing (323) is sleeved on the adapter shaft (324) and installed in the bearing chamber (3210).

6. A device for measuring the axial clearance of a tapered roller bearing according to claim 5, characterized in that: The thrust bearing connector (32) further comprises a bearing pressure cover (325), wherein the bearing pressure cover (325) is pressed onto one end of the thrust bearing (323) close to the first housing (320).

7. The device for measuring the axial clearance of a tapered roller bearing according to claim 5, characterized in that: The end of the adapter shaft (324) away from the thrust bearing (323) is provided with a thread and is connected to the rotary component (4).

8. The device for measuring the axial clearance of a tapered roller bearing according to claim 5, characterized in that: The first shell (320) and the second shell (321) are fixedly connected by bolts.

9. The device for measuring the axial clearance of a tapered roller bearing according to claim 1, characterized in that: The rotary component (4) comprises a second motor (40), a driving gear (41) and a driven gear (42); the output shaft of the second motor (40) is connected to the driving gear (41); the driving gear (41) cooperates with the driven gear (42); the driven gear (42) is mounted on the end face of the hollow shaft (60); and the force measuring component (3) is connected to the driven gear (42).

10. The device for measuring the axial clearance of a tapered roller bearing according to claim 9, characterized in that: The laser distance measuring component (5) comprises a bracket (50) and a distance sensor (51), wherein the bracket (50) is mounted on one side of the rotary rotating component (4), and the distance sensor (51) is mounted on the bracket (50) and is 5 to 10 mm away from the end surface of the driven gear (42) close to the force measuring component (3).

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