A device and method for preventing phosphorization of a tapered roller bearing inner ring

Abstract

The application discloses a kind of conical roller bearing inner ring anti-phosphorizing device and method, wherein a kind of conical roller bearing inner ring anti-phosphorizing device, including inner ring raceway, protection mechanism and compact mechanism;Protection mechanism includes a plurality of head and tail lap joint protection block, and the side of protection block towards its adjacent protection block is provided with lap joint block, and the lap joint block of adjacent protection block is lap jointed together along the radial direction of inner ring raceway, and sealing strip is arranged between adjacent lap joint block;Compact mechanism is set to the lap joint of adjacent protection block;The height of sealing pad is greater than the height of baffle at the baffle of inner ring raceway, can enhance the close of protection block and inner ring raceway between fit tightness, simultaneously to inner ring raceway baffle is sealed and protected.The application discloses a kind of conical roller bearing inner ring anti-phosphorizing device, realizes the anti-phosphorizing effect of conical roller bearing inner ring raceway, large baffle and small baffle surface, can quickly to inner ring raceway and its baffle is sealed and protected anti-phosphorization.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of phosphating treatment of metal surface, and particularly relates to a device and method for preventing phosphating of inner ring of tapered roller bearing. BACKGROUND

[0002] At present, in the existing bearing processing technology, all surfaces of the bearing ring are phosphated to form a layer of phosphating film on the surface, which provides protection for the bearing matrix and prevents corrosion.

[0003] For tapered roller bearings with high precision requirements, the raceway, large rib and small rib of the inner ring are not allowed to be phosphated, because the phosphating liquid, whether manganese-based or zinc-based, is an acidic solution, which will cause slight corrosion of the bearing matrix during phosphating. Although the corrosion points are small, these corrosion points widely existing on the bearing matrix are one of the defects causing early fatigue failure of the bearing. The traditional way is to perform raceway grinding and superfinishing after phosphating, which is complex in process, high in processing cost, easy to damage the phosphating film of other parts, and difficult to meet the precision requirements of the product. SUMMARY

[0004] In view of the problem of lack of protection of non-phosphated surfaces in the prior art, the purpose of the present application is to provide a device and method for preventing phosphating of the inner ring of a tapered roller bearing, which solves the problem of preventing the raceway surface, large rib surface and small rib surface of the tapered roller bearing from being phosphated, simplifies the processing procedure, improves production efficiency and reduces cost.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows: a device for preventing phosphating of the inner ring of a tapered roller bearing, comprising a raceway of the inner ring, a protection mechanism and a pressing mechanism;

[0006] The protection mechanism comprises a plurality of protection blocks which are end-to-end overlapped, the protection blocks are similar in shape to the raceway of the inner ring, the protection blocks are provided with overlapping blocks on the side facing their adjacent protection blocks, the overlapping blocks of adjacent protection blocks are overlapped together along the radial direction of the raceway of the inner ring, sealing strips are arranged between adjacent overlapping blocks to enhance the tightness of the adhesion between adjacent overlapping blocks; the pressing mechanism is arranged at the overlapping part of adjacent protection blocks to fix adjacent protection blocks together;

[0007] A sealing pad is arranged at the rib of the raceway of the inner ring, the height of the sealing pad is greater than the height of the rib, which can enhance the tightness of the adhesion between the protection blocks and the raceway of the inner ring, and simultaneously seal and protect the rib of the raceway of the inner ring.

[0008] Further, the pressing mechanism comprises a pressing ring, the pressing ring is sleeved on the overlapping part of adjacent protection blocks, the pressing ring has at least one opening, locking plates are arranged at both ends of the opening, and a locking assembly is arranged between the two locking plates.

[0009] Further, the locking assembly comprises a bolt, two locking plates are respectively provided with locking holes, and the bolt is connected with a nut after penetrating through the two locking holes.

[0010] Further, the overlapping part of the adjacent protection blocks is reserved with a gap for inserting a compression ring, and the side wall of the compression ring is attached to the side wall of the protection block.

[0011] Further, the side of the protection block facing the adjacent protection block is provided with a bevel, the inclination direction of the bevels of the adjacent protection blocks is opposite, and the distance between the adjacent bevels gradually decreases from outside to inside.

[0012] Further, a gap is reserved between the sealing strip and the protection block, and the gap is greater than or equal to 5 mm.

[0013] Further, a gap is reserved between the inner surface of the compression ring and the overlapping block located on the outer side, and the gap is greater than or equal to 8 mm.

[0014] Further, the side of the protection block close to the stop edge is provided with a straight edge, and the straight edge is parallel to the stop edge.

[0015] Further, the protection block is in a ring structure, and the inner diameter shape is matched with the shape of the inner ring raceway.

[0016] A method for preventing the inner ring raceway and the stop edge of a tapered roller bearing inner ring from being phosphorized, comprising the following steps: first, designing a protection block, so that a plurality of protection blocks can be connected together to form a shape similar to the inner ring raceway, and at the same time of the connection, a sealing strip is arranged between the adjacent overlapping blocks;

[0017] Then, the gap between the protection block and the stop edge of the inner ring raceway is filled with a sealing gasket, so that the inner ring raceway and the stop edge are isolated from the outside;

[0018] Finally, the overlapping part of the adjacent protection blocks is compressed by a compression mechanism, so that the protection block compresses the sealing gasket and the sealing strip, so that the inner ring raceway and the stop edge are isolated from the outside, and the inner ring raceway and the stop edge are not phosphorized in the phosphorization process.

[0019] In summary, the present application has the following beneficial effects:

[0020] The protective block is pressed on the bearing inner ring raceway by the pressing mechanism, the longitudinal force makes the sealing strip tightly adhere to the lap joint of the adjacent protective block, the sealing property is ensured, the phosphating liquid cannot permeate to the bearing inner ring raceway surface, the transverse force makes the rubber pad tightly adhere to the baffle, the phosphating liquid cannot permeate into the baffle, the phosphating prevention effect of the bearing inner ring raceway, the large baffle and the small baffle surface is finally achieved, the phosphating prevention sealing of the bearing inner ring raceway and the baffle can be quickly achieved, and the installation and dismounting are simple. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 It is a sectional view of the phosphating prevention device for the bearing inner ring along the bearing inner ring axis direction.

[0023] Figure 2 It is a structural schematic view of the pressing mechanism in the phosphating prevention device for the bearing inner ring.

[0024] In the figure: 1, inner ring raceway; 11, large baffle; 12, small baffle; 2, protection mechanism; 21, protective block; 211, large protective block; 212, small protective block; 22, lap joint block; 221, lap joint groove; 3, pressing mechanism; 31, pressing ring; 32, locking plate; 33, bolt; 34, nut; 4, sealing pad; 5, sealing strip; 6, bearing inner ring. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0026] Embodiment 1

[0027] Reference Figure 1The application discloses a phosphorization-preventing device for a tapered roller bearing inner ring, which comprises an inner ring raceway 1, a protection mechanism 2, a pressing mechanism 3 and sealing pads 4. The inner ring raceway 1 has a raceway surface, a large flange 11 and a small flange 12. The sealing pads 4 are two, one of which is filled between the large flange 11 and the protection mechanism 2, and the other is filled between the small flange 12 and the protection mechanism 2. The sealing pad 4 is annular in structure, the inner surface of the sealing pad 4 is attached to the side wall surface of the flange, and the height of the sealing pad 4 is greater than that of the corresponding flange, so that the flange of the inner ring raceway 1 is sealed and protected. The protection mechanism 2 is arranged inside the inner ring raceway 1, and the protection mechanism 2 is pressed by the pressing mechanism 3, so that the protection state of the protection mechanism 2 and the sealing pad 4 can be maintained, and the raceway surface and the surfaces of the large and small flanges 12 of the tapered roller bearing inner ring 6 are prevented from being phosphorized during the phosphorization process.

[0028] The protection mechanism 2 comprises a plurality of protection blocks 21 which are connected end to end. The protection block 21 is annular in structure, and the plurality of protection blocks 21 connected end to end can form an annular structure. The annular structure is a variable-diameter structure, so that the shape of the inner diameter of the annular structure can match the shape of the inner ring raceway 1. The number of the protection blocks 21 is not limited in the application. In the embodiment, two protection blocks 21 are taken as an example. The protection block 21 close to the large flange 11 is taken as a large protection block 211, and the protection block 21 close to the small flange 12 is taken as a small protection block 212.

[0029] The side of the protection block 21 facing the corresponding flange is provided with a straight edge which is parallel to the flange. The side of the protection block 21 opposite to the straight edge is provided with an inclined edge. The inclined edge of the large protection block 211 gradually inclines away from the large flange 11 along the bearing axis direction. The inclined edges of the two protection blocks 21 are opposite to each other, and the inclined edges of the two protection blocks 21 are opposite in inclination direction. The distance between the inclined edges of the two protection blocks 21 gradually decreases along the radial direction of the bearing from outside to inside.

[0030] The side of the protection block 21 facing the adjacent protection block 21 is provided with a connecting block 22 which has an inclined edge with the same slope as the corresponding protection block 21. The connecting block 22 on the large protection block 211 is arranged close to the inner ring raceway 1 and is attached to the surface of the inner ring raceway 1. The connecting block 22 on the small protection block 212 and the inner ring raceway 1 form a connecting groove 221 for the connecting block 22 on the large protection block 211 to be inserted. When the two protection blocks 21 are connected together, the two connecting blocks 22 can be connected together along the radial direction of the bearing. At this time, a gap is reserved between the outer surface of the connecting block 22 on the outside and the outer surface of the protection block 21, and the pressing mechanism 3 can be inserted into the gap.

[0031] A sealing strip 5 is arranged between the two overlapping blocks 22, the sealing strip 5 is arranged in a ring shape, the sealing strip 5 is sleeved outside the overlapping block 22 on the inner side, and a gap is reserved between the opposite sides of the sealing strip 5 in the bearing axis direction and the corresponding protective blocks 21, the gap is greater than or equal to 5 mm, the gap can provide a certain deformation space for the sealing strip 5, can enhance the tightness between the adjacent overlapping blocks 22, and at the same time, the surface of the inner ring raceway 1 is sealed and protected.

[0032] Combination 1 and Figure 2 The pressing mechanism 3 includes a pressing ring 31, the pressing ring 31 is in a ring structure, the pressing ring 31 is sleeved outside the overlapping block 22 on the inner side, and a gap is reserved between the inner surface of the pressing ring 31 and the outer surface of the overlapping block 22 on the outer side, the gap is greater than or equal to 8 mm, the gap can provide a movement space for the sliding during the pressing of the pressing ring 31.

[0033] The cross section of the pressing ring 31 is a trapezoid, the two inclined surfaces of the trapezoid are respectively close to the large protective block 211 and the small protective block 212, the inclined surface of the pressing ring 31 and the inclined surface of the protective block 21 are fitted, through the cooperation between the inclined surface of the pressing ring 31 and the inclined surface of the protective block 21, the large protective block 211 and the small protective block 212 respectively move to both sides along the raceway direction during the pressing of the pressing ring 31, so that the protective block 21 can press the sealing gasket 4, and the tightness between the sealing gasket 4 and the retaining edge is enhanced, and at the same time, the retaining edge is sealed and protected.

[0034] The pressing ring 31 has two openings, the two openings divide the pressing ring 31 into two identical semicircles, the two ends of the semicircle ring are respectively fixedly provided with a locking plate 32, and a locking assembly is arranged between the two locking plates 32 on the same side of the inner ring raceway 1. The locking assembly includes a bolt 33, the two locking plates 32 are respectively provided with a locking hole, and the bolt 33 is connected with a nut 34 after penetrating through the two locking holes, and the bolt 33 and the nut 34 are screwed together.

[0035] The implementation principle of the application is that: in use, in the initial state, the two protective blocks 21 are spliced together at the inner ring raceway 1, and the sealing gasket 4 is filled between the retaining edges, then the two semicircles are butted together at the gap between the two protective blocks 21, and then the pressing ring 31 is pressed inward, the large protective block 211 and the small protective block 212 respectively move to both sides along the raceway direction during the pressing of the pressing ring 31, so that the protective block 21 can press the sealing gasket 4, and the tightness between the sealing gasket 4 and the retaining edge is enhanced, and at the same time, the retaining edge is sealed and protected. At the same time, the sealing strip 5 is arranged at the transition part of the large protective block 211 and the small protective block 212, and can realize protection of the raceway surface during the pressing process, and after the pressing ring 31 is pressed into position, the bolt 33 and the nut 34 are connected to press and fix.

[0036] Embodiment 2

[0037] A method for preventing phosphorization of a tapered roller bearing inner ring raceway 1 and its rib, comprising the following steps: first, designing a protective block 21 so that two protective blocks 21 can be connected end to end to form a shape similar to the inner ring raceway 1, and at the same time, a sealing strip 5 is arranged between adjacent connected blocks 22, and a gap is reserved between the sealing strip 5 and the protective block 21 for the deformation of the sealing strip 5;

[0038] Then, the gap between the protective block 21 and the rib of the inner ring raceway 1 is filled with a sealing gasket 4, so that the inner ring raceway 1 and the outer world are isolated;

[0039] Finally, the compression ring 31 is pressed into the gap between the two protective blocks 21 and the connected blocks 22 on the outer side, and the compression ring 31 is pressed inward. During the compression of the compression ring 31, the large protective block 211 and the small protective block 212 move to both sides along the raceway direction, respectively, so that the protective block 21 can compress the sealing gasket 4, and the sealing strip 5 seals the gap between the adjacent connected blocks 22, so that the inner ring raceway 1 and the rib are isolated from the outside, and the inner ring raceway 1 and the rib are not phosphorized during the phosphorization process.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A tapered roller bearing inner ring anti-phosphating device, characterized in that: It comprises an inner ring raceway (1), a protection mechanism (2) and a pressing mechanism (3); The protection mechanism (2) comprises a plurality of protection blocks (21) which are end-to-end overlapped, the protection blocks (21) are similar in shape to the inner ring raceway (1), and the side of each protection block (21) facing its adjacent protection block (21) is provided with an overlapping block (22), the overlapping blocks (22) of adjacent protection blocks (21) are overlapped together in the radial direction of the bearing inner ring (6), and a sealing strip (5) is arranged between adjacent overlapping blocks (22) to enhance the tightness of the fit between adjacent overlapping blocks (22); the pressing mechanism (3) is arranged at the overlapping part of adjacent protection blocks (21) to fix adjacent protection blocks (21) together; A sealing pad (4) is arranged at the shoulder of the inner ring raceway (1), the height of the sealing pad (4) is greater than the height of the shoulder, which can enhance the tightness of the fit between the protection block (21) and the inner ring raceway (1), and at the same time, the shoulder of the inner ring raceway (1) is sealed and protected; The pressing mechanism (3) comprises a pressing ring (31), the pressing ring (31) is arranged at the overlapping part of adjacent protection blocks (21), and the cross section of the pressing ring (31) is trapezoidal; the pressing ring (31) has at least one opening, and the two ends of the opening are respectively provided with a locking plate (32), and a locking assembly is arranged between the two locking plates (32); The overlapping part of adjacent protection blocks (21) is reserved for the insertion of the pressing ring (31), and the side wall of the pressing ring (31) is fitted with the side wall of the protection block (21); The side of the protection block (21) facing its adjacent protection block (21) is provided with a bevel, the inclination directions of the bevels of adjacent protection blocks (21) are opposite, and the distance between adjacent bevels gradually decreases from outside to inside in the radial direction of the bearing inner ring (6); when the pressing ring (31) is arranged at the overlapping part of adjacent protection blocks (21), the two inclined surfaces of the trapezoidal pressing ring (31) are fitted with the bevels of the protection blocks (21), so that longitudinal and transverse forces are generated on the protection blocks (21).

2. A device for preventing phosphorization of an inner ring of a tapered roller bearing according to claim 1, characterized in that The locking assembly comprises a bolt (33), two locking holes are respectively formed in the two locking plates (32), and a nut (34) is connected to the bolt (33) after the bolt (33) penetrates through the two locking holes, and the bolt (33) and the nut (34) are screwed together.

3. The device according to claim 1, wherein A gap is reserved between the sealing strip (5) and the protection block (21), and the gap is greater than or equal to 5 mm.

4. The device according to claim 1, wherein A spacing is reserved between the inner surface of the pressing ring (31) and the overlapping block (22) located on the outer side, and the spacing is greater than or equal to 8 mm.

5. The device according to claim 1, wherein The side of the protection block (21) close to the shoulder is provided with a straight edge which is parallel to the shoulder.

6. The device for preventing phosphorization of the inner ring of a tapered roller bearing according to claim 1, characterized by The protection block (21) is in the shape of a ring, and the inner diameter of the protection block (21) is matched with the shape of the inner ring raceway (1).

7. A method for avoiding phosphating of the inner ring raceway (1) and its ribbing by using the device for preventing phosphating of the inner ring of a tapered roller bearing according to any one of claims 1 to 6, characterized in that, The method comprises the following steps: first, designing the protection block (21) so that a plurality of protection blocks (21) can be end-to-end overlapped to form a shape similar to the inner ring raceway (1), and at the same time, a sealing strip (5) is arranged between adjacent overlapping blocks (22); Then, the gap between the protection block (21) and the rim of the inner ring raceway (1) is filled with the sealing gasket (4), so that the rim of the inner ring raceway (1) is isolated from the outside world; Finally, the overlapping part of the adjacent protection blocks (21) is compressed by the compression mechanism (3), so that the protection blocks (21) compress the sealing gasket (4) and the sealing strip (5), so that the inner ring raceway (1) and the rim are isolated from the outside world, and the inner ring raceway (1) and the rim are not phosphorized in the phosphorization process.

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