Bearing clearance adjusting device with differential scale indication

Abstract

The utility model provides a bearing clearance adjusting device with differential scale indication, and belongs to the technical field of bearing clearance adjusting.The bearing clearance adjusting device comprises a bearing seat and a bearing adjusting cover, the bearing seat is in threaded connection with the bearing adjusting cover, a tapered roller bearing is installed on the inner side of the bearing seat, and a gear shaft is fixed to an inner ring of the tapered roller bearing; the end of the bearing adjusting cover abuts against the outer ring of the tapered roller bearing, the bearing seat is provided with a plurality of blind holes, the bearing adjusting cover is provided with a plurality of threaded holes, the number of the blind holes is one less than that of the threaded holes, and the bearing adjusting cover axially rotates with the threaded holes and the blind holes as reference objects to adjust the axial clearance of the tapered roller bearing. According to the scheme, the speed reducer bearing axial clearance adjusting device with the differential scales is adopted, the differential principle is utilized, the principle is simple and clear, economical and practical, the device has obvious superiority in practicability and is very convenient to popularize and use, the problem of precise clearance adjustment is solved through the structure, and the precision during axial clearance adjustment is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearing clearance adjustment, and in particular relates to a bearing clearance adjustment device with differential scale indication. Background Art

[0002] Working clearance is an important quality indicator of rolling bearings and an important parameter in bearing applications. In actual use, the working clearance of the bearing will affect the load distribution, vibration, noise, friction torque and life of the bearing. Inappropriate working clearance of the bearing will cause harm to the equipment.

[0003] (1) If the working clearance of the bearing is too small, the friction torque of the bearing will increase, thereby generating a large amount of heat, which can easily cause the bearing to heat up and damage. This is because when the working clearance of the bearing is too small, the lubrication of the rolling elements and the inner and outer rings of the bearing will be poor, and a large amount of heat will be generated due to dry friction, resulting in wear, bonding, and cracking of the inner and outer rings of the bearing, which will cause bearing damage.

[0004] (2) The working clearance of the bearing is too large, which is mainly caused by the natural clearance of the bearing being too large and the bearing clamping force being insufficient. For example, in a high-speed reducer, when the natural clearance of the bearing is large, the working clearance is also relatively large, which will cause the reducer to vibrate more during operation and reduce the service life of the bearing.

[0005] The bearing clearance is very small, with a unit of 0.001mm, so the accuracy of bearing clearance adjustment is very important.

[0006] A bearing axial clearance adjustment device and a gearbox (patent application number: CN202321656681.8) are currently disclosed, which include an end cover and an adjustment assembly, the end cover is connected to a mounting box, the adjustment assembly includes a threaded annular seat ring and an adjustment nut, the annular seat ring is arranged in the mounting box, one end of the annular seat ring abuts against an oil filling ring on one side of the bearing, the bearing sleeve is arranged on a rotating shaft, and the annular seat ring can move axially along the rotating shaft; the end of the adjusting nut away from the oil filling ring abuts against the end cover, and the adjusting nut can rotate relative to the annular seat ring to increase the length of the adjustment assembly.

[0007] The size of the bearing clearance adjusted by the clearance adjustment device is not easy to calculate, that is, the adjustment accuracy cannot be more accurately and finely grasped. Utility Model Content

[0008] The present application provides a bearing clearance adjustment device with a differential scale indication, aiming to solve the problem that the size of the bearing clearance adjusted by the existing bearing clearance adjustment device is inconvenient to calculate and the bearing clearance adjustment accuracy is low.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] A bearing clearance adjustment device with a differential scale indication comprises a bearing seat and a bearing adjustment cover, the bearing seat is threadedly connected to the bearing adjustment cover, a tapered roller bearing is installed on the inner side of the bearing seat, a gear shaft is fixed to the inner ring of the tapered roller bearing, the end of the bearing adjustment cover is against the outer ring of the tapered roller bearing, the bearing seat is provided with a number of blind holes, the bearing adjustment cover is provided with a number of threaded holes, the number of the blind holes is one less than the number of the threaded holes, the bearing adjustment cover is axially rotated with the threaded holes and the blind holes as reference objects to adjust the axial clearance of the tapered roller bearing.

[0011] Preferably, the bearing seat is provided with external scale marks having the same number as the blind holes, the bearing adjustment cover is provided with internal scale marks having the same number as the threaded holes, the external scale marks are equidistantly spaced from the blind holes, and the internal scale marks are equidistantly spaced from the threaded holes.

[0012] Preferably, it also includes a lock buckle and a hexagonal bolt, the lock buckle is provided with a plug and a first screw hole, the plug and the blind hole are gap-matched, and the hexagonal bolt passes through the first screw hole and the threaded hole in sequence to lock the bearing seat and the bearing adjustment cover.

[0013] Preferably, a stop gasket is provided between the lock buckle and the bearing adjustment cover, the stop gasket is provided with a second screw hole and a limit piece, the second screw hole corresponds to the first screw hole and the threaded hole, and the limit piece abuts against the side of the hexagonal bolt head.

[0014] Preferably, the bearing seat is provided with an internal thread, and the bearing adjustment cover is provided with an external thread, and the internal thread matches the external thread.

[0015] Preferably, the bearing seat comprises a bearing seat upper cover and a bearing seat base, and the bearing seat upper cover and the bearing seat base are detachably fixed by bolts.

[0016] Preferably, the bearing adjustment cover is an annular structure.

[0017] The utility model has the following beneficial effects:

[0018] (1) This scheme adopts a reducer bearing axial clearance adjustment device with a differential scale (the number of blind holes and threaded holes differs by one, and the number of external scale marks and internal scale marks also differs by one, thus forming a differential structure). The differential principle is used, the principle is simple and clear, economical and practical, and has obvious advantages in practicality. It is very convenient to promote and use. This structure solves the problem of precise clearance adjustment and greatly improves the accuracy of axial clearance adjustment. It is also easy and quick to install and maintain, and prevents bearing string movement while ensuring the accuracy of clearance adjustment. This structure has a very broad application prospect, and at the same time, the manufacturing cost is low and the processing difficulty is small;

[0019] (2) After adjusting the axial clearance of the bearing, the bearing seat and the bearing adjustment cover are locked by means of locks, stop washers, hexagonal bolts and other structures, thereby limiting the amount of screw-in when adjusting the clearance to ensure safety and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the bearing clearance adjustment device in the utility model;

[0021] Figure 2 for Figure 1 A partial enlarged view of the middle C area;

[0022] Figure 3 It is an exploded view of the bearing clearance adjustment device in the utility model;

[0023] Figure 4 It is a schematic diagram of the structure of the lock buckle and the stop gasket in the utility model;

[0024] Figure 5 It is a schematic diagram of the scale being the zero point position in the present utility model;

[0025] Figure 6 It is a schematic diagram of the axial relaxation of the bearing adjustment cover in the utility model;

[0026] Figure 7 It is a schematic diagram of the axial tightening of the bearing adjustment cover in the utility model.

[0027] Among them, 1-bearing seat, 11-external scale mark, 12-blind hole, 13-bearing seat cover, 14-bearing seat base, 2-tapered roller bearing, 3-bearing adjustment cover, 31-inner scale mark, 32-threaded hole, 4-locking buckle, 41-first screw hole, 42-plug, 5-stop gasket, 51-second screw hole, 52-limiting piece, 6-hexagonal bolt, 7-gear shaft. DETAILED DESCRIPTION

[0028] Example 1

[0029] like Figure 1-4 As shown, a bearing clearance adjustment device with differential scale indication includes a bearing seat 1 and a bearing adjustment cover 3, the bearing seat 1 is threadedly connected to the bearing adjustment cover 3, a tapered roller bearing 2 is installed on the inner side of the bearing seat 1, a gear shaft 7 is fixed to the inner ring of the tapered roller bearing 2, the end of the bearing adjustment cover 3 is against the outer ring of the tapered roller bearing 2, the bearing seat 1 is provided with a number of blind holes 12, the bearing adjustment cover 3 is provided with a number of threaded holes 32, the number of the blind holes 12 is one less than the number of the threaded holes 32, the bearing adjustment cover 3 is axially rotated with the threaded holes 32 and the blind holes 12 as reference objects to adjust the axial clearance of the tapered roller bearing 2.

[0030] Manually turn the bearing adjustment cover 3 to move it axially, tighten or loosen the outer ring of the tapered roller bearing 2, and adjust the axial clearance of the tapered roller bearing 2, such as Figure 5 shown.

[0031] The bearing seat 1 is provided with external scale marks 11 having the same number as the blind holes 12, and the bearing adjustment cover 3 is provided with internal scale marks 31 having the same number as the threaded holes 32. The external scale marks 11 are equidistantly spaced from the blind holes 12, and the internal scale marks 31 are equidistantly spaced from the threaded holes 32.

[0032] In this embodiment, the number of the blind holes 12 and the number of the external scale marks 11 are both 9, and the number of the threaded holes 32 and the number of the internal scale marks 31 are both 10.

[0033] It also includes a lock buckle 4 and a hexagonal bolt 6. The lock buckle 4 is provided with a plug 42 and a first screw hole 41. The plug 42 is clearance-matched with the blind hole 12. The hexagonal bolt 6 passes through the first screw hole 41 and the threaded hole 32 in sequence to lock the bearing seat 1 and the bearing adjustment cover 3.

[0034] A stop washer 5 is provided between the lock buckle 4 and the bearing adjustment cover 3 . The stop washer 5 is provided with a second screw hole 51 and a limit piece 52 . The second screw hole 51 corresponds to the first screw hole 41 and the threaded hole 32 . The limit piece 52 abuts against the side of the head of the hexagonal bolt 6 .

[0035] The stop washer 5 plays a role of relaxation, ensuring the stability of locking.

[0036] The bearing seat 1 is provided with an internal thread, and the bearing adjustment cover 3 is provided with an external thread, and the internal thread matches the external thread.

[0037] The bearing seat 1 comprises a bearing seat upper cover 13 and a bearing seat base 14 , and the bearing seat upper cover 13 and the bearing seat base 14 are detachably fixed by bolts.

[0038] The bearing adjustment cover 3 is an annular structure.

[0039] Working principle of this device: Figure 5 , where A is the bearing seat and B is the bearing adjustment cover (only referred to in the principle description to distinguish it from the numbers on the scale). B rotates one circle (360°) and moves forward or backward along the axial direction by a distance of one pitch P. One grid above A is 1 / n-1 times the pitch P, and one grid above B is 1 / n times the pitch P. (n=10 in this diagram)

[0040] The initial position is at zero. Figure 5 (i.e. 1 position is aligned), rotate B clockwise (such as Figure 6 and Figure 7 As shown in the figure, clockwise rotation is tightening, counterclockwise rotation is loosening), push the outer ring of the bearing forward, when 2 are aligned, as shown in the figure, Figure 7 , B pushes the outer ring of the bearing forward by (1 / n-1)-(1 / n) times the pitch P. Continue to rotate, and when 3 is aligned, it will advance by 2*((1 / n-1)-(1 / n)) times the pitch P, and continue to rotate until 10 is aligned with 1, which means it will advance by 9*((1 / n-1)-(1 / n)) times the pitch P (which is equivalent to advancing one grid p / n on the bearing adjustment cover). Therefore, the accuracy of adjusting the clearance is 1 / n(n-1) times the pitch P. As the principle is described above, B with a threaded hole rotates one circle (360°) and advances or retreats a distance of one pitch P in the axial direction. B is designed with n threaded holes and n raised internal scale marks. A is designed with n-1 blind holes and n-1 raised external scale marks. The two parts are in differential form (the larger n is, the higher the adjustment accuracy is). Rotate the bearing adjustment cover (clockwise) to align the inner scale mark with the outer scale mark. At this time, the bearing adjustment cover pushes the outer ring of the bearing forward in the axial direction by 1 / n (n-1) times the pitch P. During the rotation process, any alignment of the inner scale mark and the outer scale mark will push the outer ring of the bearing forward in the axial direction by 1 / n (n-1) times the pitch P. Afterwards, use the lock buckle to determine the position, lock it with bolts, and use a stop washer to prevent loosening.

[0041] By checking the mechanical design manual, it is determined that the fine pitch P is 2mm. After calculation, the adjustment accuracy in this embodiment is 0.018mm. For the existing adjustment device (the number of blind holes and threaded holes is the same, and there is no differential design), when n=10, that is, the number of threaded holes is 10, the adjustment accuracy is 0.2mm. By comparison, it is obvious that the adjustment accuracy of this device is greatly improved.

[0042] Example 2

[0043] The difference between this embodiment and the first embodiment is that the number of the blind holes 12 and the number of the external scale marks 11 are both 10, and the number of the threaded holes 32 and the number of the internal scale marks 31 are both 11.

[0044] The adjustment accuracy in this embodiment is 0.015 mm.

[0045] Example 3

[0046] The difference between this embodiment and the first embodiment is that the number of the blind holes 12 and the number of the external scale marks 11 are both 12, and the number of the threaded holes 32 and the number of the internal scale marks 31 are both 13.

[0047] The adjustment accuracy in this embodiment is 0.011 mm.

[0048] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A bearing clearance adjustment device with a differential scale indication, comprising a bearing seat (1) and a bearing adjustment cover (3), wherein the bearing seat (1) and the bearing adjustment cover (3) are threadedly connected, and characterized in that: A tapered roller bearing (2) is installed inside the bearing seat (1), a gear shaft (7) is fixed to the inner ring of the tapered roller bearing (2), an end of the bearing adjustment cover (3) is butted against the outer ring of the tapered roller bearing (2), the bearing seat (1) is provided with a number of blind holes (12), the bearing adjustment cover (3) is provided with a number of threaded holes (32), the number of the blind holes (12) is one less than the number of the threaded holes (32), the bearing adjustment cover (3) is axially rotated with the threaded holes (32) and the blind holes (12) as reference objects, and the axial clearance of the tapered roller bearing (2) is adjusted.

2. A bearing clearance adjustment device with differential scale indication according to claim 1, characterized in that: The bearing seat (1) is provided with external scale marks (11) having the same number as the blind holes (12), and the bearing adjustment cover (3) is provided with internal scale marks (31) having the same number as the threaded holes (32). The external scale marks (11) and the blind holes (12) are equidistantly spaced, and the internal scale marks (31) and the threaded holes (32) are equidistantly spaced.

3. A bearing clearance adjustment device with differential scale indication according to claim 1 or 2, characterized in that: It also includes a lock buckle (4) and a hexagonal bolt (6). The lock buckle (4) is provided with a plug (42) and a first screw hole (41). The plug (42) is clearance-matched with the blind hole (12). The hexagonal bolt (6) passes through the first screw hole (41) and the threaded hole (32) in sequence to lock the bearing seat (1) and the bearing adjustment cover (3).

4. A bearing clearance adjustment device with differential scale indication according to claim 3, characterized in that: A stop washer (5) is provided between the lock buckle (4) and the bearing adjustment cover (3), and the stop washer (5) is provided with a second screw hole (51) and a stopper (52), the second screw hole (51) corresponds to the first screw hole (41) and the threaded hole (32), and the stopper (52) abuts against the side surface of the head of the hexagonal bolt (6).

5. The bearing clearance adjustment device with differential scale indication according to claim 1, characterized in that: The bearing seat (1) is provided with an internal thread, and the bearing adjustment cover (3) is provided with an external thread, and the internal thread matches the external thread.

6. A bearing clearance adjustment device with differential scale indication according to claim 1, characterized in that: The bearing seat (1) comprises a bearing seat upper cover (13) and a bearing seat base (14), and the bearing seat upper cover (13) and the bearing seat base (14) are detachably fixed by bolts.

7. A bearing clearance adjustment device with differential scale indication according to claim 1, characterized in that: The bearing adjustment cover (3) is an annular structure.

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