Rollaway nest sealing die for phosphorization of tapered roller bearing

Abstract

The utility model discloses a raceway closing die for phosphatizing a tapered roller bearing. The raceway closing die comprises an inner ring closing die and an outer ring closing die, the inner ring sealing die comprises a base, an inner ring fastening screw, an inner ring upper cover plate, an inner ring locking nut, an upper flat washer and a lower flat washer. The plane of the base is in a cross shape, and the top faces of the four outer ends are each fixedly provided with a spherical supporting pier. The inner ring fastening screw rod is arranged in the countersunk through hole of the base in a penetrating manner; the inner hole surfaces of the upper part and the lower part of the inner ring upper cover plate are cylindrical surfaces and conical surfaces in one-to-one correspondence; the inner ring upper cover plate sleeves the upper part of the inner ring fastening screw rod through a screw rod penetrating hole in the top plate; the inner ring locking nut is mounted at the head of the inner ring fastening screw rod penetrating out of the inner ring upper cover plate; and the upper and lower flat washers are sleeved between the raceway surface of the bearing inner ring and the upper and large flanges of the bearing inner ring. The outer ring sealing mold comprises an outer ring lower cover plate, an outer ring upper cover plate and an outer ring fastening assembly. According to the utility model, the roller path surface can be effectively prevented from being contacted with a phosphating solution in the phosphating process of the bearing ring.

Description

Technical Field

[0001] The utility model relates to a raceway closing die for phosphating a tapered roller bearing. Background Art

[0002] Bearing phosphating process is a commonly used surface treatment method. After phosphating treatment, the wear resistance and corrosion resistance of bearing rings can be improved.

[0003] However, the phosphating process generally involves phosphating the entire ring. The roughness of the bearing raceway surface will increase slightly after phosphating. In the early stages of bearing use (running-in phase), worn phosphating residues may mix with the grease, contaminating the grease. This may cause the bearing temperature to rise significantly in the early stages of use and affect the later running-in of the bearing. Moreover, since the phosphating process is a chemical reaction, the depth of the phosphating layer is difficult to control. In the later stages of bearing use, when the phosphating layer is completely worn, phosphating pits of varying depths may form on the raceway surface, which can be slightly irritating and affect the use of the bearing to a certain extent.

[0004] For the above reasons, it is best to phosphate the outer surface of the bearing and not the inner raceway. However, the general phosphating method is to immerse the entire bearing ring in the phosphating tank, so a sealing device is required to completely seal the raceway of the bearing ring to prevent the raceway from contacting the phosphating liquid during the phosphating process. Utility Model Content

[0005] The purpose of the utility model is to overcome the defects of the prior art and provide a tapered roller bearing raceway closed die for phosphating, which can effectively prevent the raceway surface of the bearing ring from contacting the phosphating liquid during the phosphating process.

[0006] The purpose of the utility model is achieved as follows: a raceway closed mold for phosphating a tapered roller bearing, comprising an inner ring closed mold and an outer ring closed mold; wherein,

[0007] The inner ring closed mold includes a base, an inner ring fastening screw, an inner ring upper cover plate, an inner ring locking nut, an upper flat washer and a lower flat washer;

[0008] The base has a cross-shaped plane, a countersunk through hole is provided on the central bottom surface of the base, the four outer ends of the base are located on a circle whose diameter matches the outer diameter of the bearing inner ring, and a spherical support pier is fixed to the top surface of each of the four outer ends of the base;

[0009] The inner ring fastening screw is upwardly passed through the countersunk through hole of the base;

[0010] The inner ring upper cover plate includes a top plate and a sleeve; a screw through-hole is provided in the center of the top plate and a plurality of liquid permeable holes are evenly distributed around the periphery of the screw through-hole; the sleeve is connected to the bottom edge of the top plate, the upper inner hole surface of the sleeve is a cylindrical surface whose height is adapted to the height of the small rib of the bearing inner ring, the lower inner hole surface of the sleeve is a conical surface whose height is adapted to the height of the raceway surface of the bearing inner ring, the taper of the lower inner hole surface of the sleeve is adapted to the taper of the raceway surface of the bearing inner ring, and the inner diameter of the lower inner hole surface of the sleeve is larger than the outer diameter of the raceway surface of the bearing inner ring; the inner ring upper cover plate is sleeved on the upper part of the inner ring fastening screw through the screw through-hole on the top plate;

[0011] The inner ring locking nut is installed on the head of the inner ring fastening screw that passes through the inner ring upper cover plate;

[0012] The upper flat washer is sleeved between the top of the raceway surface of the bearing inner ring and the bottom surface of the small rib of the bearing inner ring;

[0013] The lower flat washer is sleeved between the bottom of the raceway surface of the bearing inner ring and the top surface of the large rib of the bearing inner ring;

[0014] The outer ring closed mold includes an outer ring lower cover plate, an outer ring upper cover plate and an outer ring fastening assembly;

[0015] The outer ring lower cover plate is a disc with a diameter that matches the inner diameter of the lower thread of the bearing outer ring, and a countersunk threaded through hole is provided at the center of the bottom surface. An arc-shaped lower ring groove is provided on the upper part of the outer diameter surface of the outer ring lower cover plate, and a lower sealing ring is sleeved in the lower ring groove.

[0016] The outer ring upper cover plate is a disc with a diameter that is clearance-matched with the inner diameter of the upper tooth opening of the bearing outer ring and a through hole is provided at the center of the surface. An arc-shaped upper ring groove is provided at the lower part of the outer diameter surface of the outer ring upper cover plate, and an upper sealing ring is sleeved in the upper ring groove.

[0017] The outer ring fastening assembly includes an outer ring fastening screw, an outer ring locking nut, a locking head and a locking rod; the outer ring fastening screw is upwardly connected to the countersunk threaded through hole of the outer ring lower cover plate and inserted into the through hole of the inner ring upper cover plate; the outer ring locking nut is installed on the outer ring fastening screw and is located on the top surface of the outer ring lower cover plate; the locking head is a cylinder, a through hole is radially opened on the upper part of the locking head, and a threaded blind hole is opened on the bottom surface of the locking head; the locking rod is inserted into the through hole of the locking head, and the locking head is connected to the end head of the outer ring fastening screw exposed on the top surface of the outer ring upper cover plate through a threaded blind hole.

[0018] The above-mentioned tapered roller bearing raceway closed mold for phosphating, wherein an inverted U-shaped handle with a height lower than the height of the through hole of the locking head is fixed on the top surface of the outer ring upper cover plate of the outer ring closed mold and on both sides of the through hole.

[0019] The above-mentioned raceway closed mold for phosphating of tapered roller bearings, wherein the outer ring fastening assembly of the outer ring closed mold also includes two rubber washers and two steel washers; the two rubber washers are both sleeved on the outer ring fastening screw and are located one-to-one between the screw head of the outer ring fastening screw and the step surface of the countersunk threaded through hole of the outer ring lower cover plate and the top surface of the outer ring upper cover plate; the two steel washers are both sleeved on the outer ring fastening screw and are located one-to-one on the top surface of the outer ring lower cover plate and the bottom surface of the locking head.

[0020] The characteristics of the tapered roller bearing raceway closed mold for phosphating of the utility model are:

[0021] 1. There are corresponding closed molds for the inner and outer rings of the bearings, with simple structure, easy processing, and convenient assembly and disassembly;

[0022] 2. It can completely seal the raceway surface of the bearing ring with good sealing effect, effectively avoid the contact between the raceway surface of the bearing ring and the phosphating liquid during the phosphating process, and improve the performance of high-precision bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of the inner ring closed mold of the utility model;

[0024] Figure 1a This is a top view of the base in the inner ring closed mold of the utility model;

[0025] Figure 1b This is a top view of the inner ring upper cover plate in the inner ring closed mold of the utility model;

[0026] Figure 1c This is an axial cross-sectional view of the inner ring upper cover plate in the inner ring closed mold of the utility model;

[0027] Figure 2 This is a schematic structural diagram of the outer ring closed mold of the utility model;

[0028] Figure 2a This is an axial cross-sectional view of the outer ring closed mold of the utility model;

[0029] Figure 3 This is a diagram showing the use of a raceway-enclosed mold for phosphating a tapered roller bearing according to the present invention. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] The utility model discloses a raceway closed mold for phosphating a tapered roller bearing, comprising an inner ring closed mold 1 and an outer ring closed mold 2.

[0032] See also Figure 1 、 Figure 1a 、 Figure 1b and Figure 1c The inner ring closed mold 1 includes a base 10, an inner ring fastening screw 12, an inner ring upper cover 13, an inner ring locking nut 14, an upper flat washer 15 and a lower flat washer 16; wherein,

[0033] The base 10 is cross-shaped in plan, with a countersunk through-hole 100 defined in the central bottom surface. The four outer ends of the base 10 are located on a circle whose diameter matches the outer diameter of the bearing inner ring 3A. A spherical support pier 11 is fixed to the top surface of each of the four outer ends of the base 10.

[0034] The inner ring fastening screw 12 is upwardly passed through the countersunk through hole 100 of the base 10;

[0035] The inner ring upper cover plate 13 includes a top plate 131 and a sleeve 132; a screw through hole 130 is provided in the center of the top plate 131, and four liquid permeable holes 133 are evenly distributed around the periphery of the screw through hole 130; the sleeve 132 is connected to the bottom edge of the top plate 131, the upper inner hole surface 1321 of the sleeve 132 is a cylindrical surface whose height is adapted to the height of the small rib of the bearing inner ring 3A, the lower inner hole surface 1322 of the sleeve 132 is a conical surface whose height is adapted to the height of the raceway of the bearing inner ring 3A, and the taper of the lower inner hole surface 1322 of the sleeve 132 is adapted to the taper of the raceway surface of the bearing inner ring 3A, and the inner diameter of the lower inner hole surface 1322 of the sleeve 132 is slightly larger than the outer diameter of the raceway surface of the bearing inner ring 3A; the inner ring upper cover plate 13 is sleeved on the upper part of the inner ring fastening screw 12 through the screw through hole 130 on the top plate 131;

[0036] The inner ring locking nut 14 is installed on the head of the inner ring fastening screw 12 passing through the inner ring upper cover plate 13;

[0037] The upper flat washer 15 is sleeved between the top of the raceway surface of the bearing inner ring 3A and the bottom surface of the small rib of the bearing inner ring 3A;

[0038] The lower flat washer 16 is sleeved between the bottom of the raceway surface of the bearing inner ring 3A and the top surface of the large rib of the bearing inner ring 3A.

[0039] The upper flat washer 15 and the lower flat washer 16 are both made of high temperature resistant materials.

[0040] See also Figure 2 and Figure 2a The outer ring closed mold 2 includes an outer ring lower cover plate 20, an outer ring upper cover plate 22 and an outer ring fastening assembly; wherein,

[0041] The outer ring lower cover plate 20 is a circular disc with a diameter that matches the inner diameter of the lower thread of the bearing outer ring 3B. A countersunk threaded through hole is provided at the center of the bottom surface. An arc-shaped lower annular groove is provided on the upper portion of the outer diameter surface of the outer ring lower cover plate 20, and a lower sealing ring 21 is sleeved in the lower annular groove.

[0042] The outer ring upper cover plate 22 is a circular disc with a diameter that is a gap that matches the inner diameter of the upper thread of the bearing outer ring 3B. It has a through hole in the center of its surface. An arc-shaped upper annular groove is defined in the lower portion of the outer diameter surface of the outer ring upper cover plate 22, and an upper sealing ring 23 is sleeved in this upper annular groove. An inverted U-shaped handle 220 is fixed to the top surface of the outer ring upper cover plate 22 and on both sides of the through hole.

[0043] The fastening assembly includes an outer ring fastening screw 24, an outer ring locking nut 25, a locking head 26, a locking rod 27, two rubber washers 28 and two steel washers 29; the outer ring fastening screw 24 is upwardly connected to the countersunk threaded through hole of the outer ring lower cover plate 20 and inserted into the through hole of the inner ring upper cover plate 22; the outer ring locking nut 25 is installed on the outer ring fastening screw 24 and is located on the top surface of the outer ring lower cover plate 20; the locking head 26 is a cylinder with a height greater than the height of the handle 220 on the outer ring upper cover plate 22, and a through hole is radially opened on the upper part of the locking head 26. A threaded blind hole is provided; a locking rod 27 is inserted into the through-hole of a locking head 26, which is connected, via the threaded blind hole, to the end of the outer ring fastening screw 24, which is exposed on the top surface of the outer ring upper cover plate 22. Two rubber washers 28 are fitted over the outer ring fastening screw 24 and positioned, one-to-one, between the screw head of the outer ring fastening screw 24 and the stepped surface of the countersunk threaded through-hole in the outer ring lower cover plate 20, as well as on the top surface of the outer ring upper cover plate 22. Two steel washers 29 are fitted over the outer ring fastening screw 24 and positioned, one-to-one, on the top surface of the outer ring lower cover plate 20 and the bottom surface of the locking head 26. Both rubber washers 28 are high-temperature-resistant O-rings.

[0044] The raceway closed mold for phosphating a tapered roller bearing of the present invention requires that the metal parts be phosphated before use to prevent the reaction between the mold and the phosphating liquid, which may result in insufficient phosphating reaction of the bearing inner ring 3A and the bearing outer ring 3B. This can also prevent the mold from rusting and extend the service life of the mold.

[0045] See also Figure 3 The utility model of the tapered roller bearing phosphating raceway closed mold includes the following processes when used:

[0046] Process 1, using the inner ring sealing mold 1 to seal the raceway surface of the bearing inner ring 3A, includes the following steps:

[0047] S11, insert the inner ring fastening screw 12 upward into the countersunk through hole 100 of the base 10;

[0048] S12, placing the large end face of the bearing inner ring 3A downward on the four spherical support piers 11 of the base 10 of the inner ring closed mold 1;

[0049] S13, buckle the inner ring upper cover plate 13 onto the small end face of the bearing inner ring 3A and put it on the upper part of the inner ring fastening screw 12 until the lower inner hole surface 1322 of the inner ring upper cover plate 13 contacts the outer end face of the upper flat washer 15 and the outer end face of the lower flat washer 16 respectively.

[0050] S14: Connect the inner ring locking nut 14 to the upper portion of the inner ring fastening screw 12 extending through the screw through-hole 130 of the inner ring upper cover plate 13. Press the inner ring upper cover plate 13 downward, so that the lower inner hole surface 1322 of the inner ring upper cover plate 13 further tightens the upper flat washer 15 and the lower flat washer 16, thus completing the sealing of the raceway surface of the bearing inner ring 3A.

[0051] Process 2, using the outer ring sealing mold 2 to seal the raceway surface of the bearing outer ring 3B, includes the following steps:

[0052] S21, first install the outer ring clamping screw 24 with the outer ring locking nut 25, a rubber washer 28 and a steel washer 29 on the outer ring lower cover plate 20, and then put the lower sealing ring 21 into the lower ring groove of the outer ring lower cover plate 20;

[0053] S22, put the lower tooth edge of the bearing outer ring 3B onto the outer ring lower cover plate 20 until the lower sealing ring 21 is embedded in the lower tooth edge groove of the bearing outer ring 3B;

[0054] S23, insert the outer ring upper cover plate 22 into the upper tooth opening of the bearing outer ring 3B until the upper sealing ring 23 inserted into the upper ring groove of the outer ring upper cover plate 22 is embedded in the upper tooth opening groove of the bearing outer ring 3B;

[0055] S24. First, install the locking head 26 on the end of the outer ring clamping screw 24 exposed on the top surface of the outer ring upper cover plate 22 through another sealing gasket 18 and another steel washer 29. Then, insert the locking rod 27 into the through-hole of the locking head 26. Then, turn the locking rod 27 to tighten the locking head 26, so that the outer ring upper cover plate 22 is fixed to the outer ring clamping screw 24, completing the sealing of the raceway surface of the bearing outer ring 3B.

[0056] Process 3: Immerse the bearing inner ring 3A mounted on the inner ring closed mold 1 and the bearing outer ring 3B mounted on the outer ring closed mold 2 into the phosphating tank (see Figure 3), because the inner ring upper cover plate 13 of the inner ring closed mold 1 is provided with a liquid permeable hole 133, the base 10 adopts a cross structure, and a cavity is left between the inner ring upper cover plate 13 and the small end face of the bearing inner ring 3A, the outer diameter surfaces of the large and small ribs of the bearing inner ring 3A, the large and small end faces of the bearing inner ring 3A, and the inner diameter surface of the bearing inner ring 3A are fully in contact with the phosphating liquid 4, completing the phosphating reaction; because the ends of the raceway surface of the bearing outer ring 3B are correspondingly closed by the outer ring lower cover plate 20 and the outer ring upper cover plate 22 of the outer ring closed mold 2, only the outer diameter surface of the bearing outer ring 3B, the two end surfaces of the bearing outer ring 3B, the lower thread of the bearing outer ring 3B with a gap between the outer end face of the outer ring lower cover plate 20, and the upper thread of the bearing outer ring 3B with a gap between the outer end face of the outer ring upper cover plate 22 can fully contact with the phosphating liquid 4, completing the phosphating reaction;

[0057] Process 4: After the phosphating operation is completed, the bearing inner ring 3A installed on the inner ring closed mold 1 and the bearing outer ring 3B installed on the outer ring closed mold 2 are taken out of the phosphating tank, and the inner ring closed mold 1 is removed in the reverse order of the installation; at the same time, the outer ring closed mold 2 is removed in the reverse order of the installation; because the sealed cavity of the outer ring closed mold 2 is large and prone to negative pressure, the outer ring upper cover plate 22 is pulled out from the upper tooth of the bearing outer ring 3B with the help of two handles 220 fixed on the top surface of the outer ring upper cover plate 22.

[0058] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the art may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention and should be defined by the claims.

Claims

1. A raceway closed mold for phosphating a tapered roller bearing, comprising an inner ring closed mold and an outer ring closed mold; characterized in that: The inner ring closed mold includes a base, an inner ring fastening screw, an inner ring upper cover plate, an inner ring locking nut, an upper flat washer and a lower flat washer; The base has a cross-shaped plane, a countersunk through hole is provided on the central bottom surface of the base, the four outer ends of the base are located on a circle whose diameter matches the outer diameter of the bearing inner ring, and a spherical support pier is fixed to the top surface of each of the four outer ends of the base; The inner ring fastening screw is upwardly inserted into the countersunk through hole of the base; The inner ring upper cover plate includes a top plate and a sleeve; a screw through-hole is provided in the center of the top plate and a plurality of liquid permeable holes are evenly distributed around the periphery of the screw through-hole; the sleeve is connected to the bottom edge of the top plate, the upper inner hole surface of the sleeve is a cylindrical surface whose height is adapted to the height of the small rib of the bearing inner ring, the lower inner hole surface of the sleeve is a conical surface whose height is adapted to the height of the raceway surface of the bearing inner ring, the taper of the lower inner hole surface of the sleeve is adapted to the taper of the raceway surface of the bearing inner ring, and the inner diameter of the lower inner hole surface of the sleeve is larger than the outer diameter of the raceway surface of the bearing inner ring; the inner ring upper cover plate is sleeved on the upper part of the inner ring fastening screw through the screw through-hole on the top plate; The inner ring locking nut is installed on the head of the inner ring fastening screw that passes through the inner ring upper cover plate; The upper flat washer is sleeved between the top of the raceway surface of the bearing inner ring and the bottom surface of the small rib of the bearing inner ring; The lower flat washer is sleeved between the bottom of the raceway surface of the bearing inner ring and the top surface of the large rib of the bearing inner ring; The outer ring closed mold includes an outer ring lower cover plate, an outer ring upper cover plate and an outer ring fastening assembly; The outer ring lower cover plate is a disc with a diameter that matches the inner diameter of the lower thread of the bearing outer ring, and a countersunk threaded through hole is provided at the center of the bottom surface. An arc-shaped lower ring groove is provided on the upper part of the outer diameter surface of the outer ring lower cover plate, and a lower sealing ring is sleeved in the lower ring groove. The outer ring upper cover plate is a disc with a diameter that is clearance-matched with the inner diameter of the upper tooth opening of the bearing outer ring and a through hole is provided at the center of the surface. An arc-shaped upper ring groove is provided at the lower part of the outer diameter surface of the outer ring upper cover plate, and an upper sealing ring is sleeved in the upper ring groove. The outer ring fastening assembly includes an outer ring fastening screw, an outer ring locking nut, a locking head and a locking rod; the outer ring fastening screw is upwardly connected to the countersunk threaded through hole of the outer ring lower cover plate and inserted into the through hole of the inner ring upper cover plate; the outer ring locking nut is installed on the outer ring fastening screw and is located on the top surface of the outer ring lower cover plate; the locking head is a cylinder, a through hole is radially opened on the upper part of the locking head, and a threaded blind hole is opened on the bottom surface of the locking head; the locking rod is inserted into the through hole of the locking head, and the locking head is connected to the end head of the outer ring fastening screw exposed on the top surface of the outer ring upper cover plate through a threaded blind hole.

2. The raceway closed mold for phosphating of tapered roller bearings according to claim 1, characterized in that: An inverted U-shaped handle with a height lower than that of the through hole of the locking head is fixed on the top surface of the outer ring upper cover plate of the outer ring closed mold and on both sides of the through hole.

3. The raceway closed mold for phosphating of tapered roller bearings according to claim 1, characterized in that: The outer ring fastening assembly of the outer ring closed mold also includes two rubber washers and two steel washers; the two rubber washers are both sleeved on the outer ring fastening screw and are located one-to-one between the screw head of the outer ring fastening screw and the step surface of the countersunk threaded through hole of the outer ring lower cover plate and the top surface of the outer ring upper cover plate; the two steel washers are both sleeved on the outer ring fastening screw and are located one-to-one on the top surface of the outer ring lower cover plate and the bottom surface of the locking head.

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