Double-row needle bearing for continuous casting machine

Abstract

The utility model relates to the technical field of needle bearings, in particular to a double-row needle bearing for a continuous casting machine, which comprises an outer ring and a protective device, a groove is arranged on the surface of the outer ring, a connecting sleeve is arranged in the outer ring, a cylindrical rolling shaft is rotatably connected in the connecting sleeve, an inner ring is arranged in the connecting sleeve, and the protective device is arranged in the inner ring. The protection device is arranged between the inner ring and the outer ring and comprises a first protection cover and a second protection cover. By arranging the protective device, the gap between the outer ring and the inner ring is effectively shielded and protected, the effect of protecting the joint of the inner ring and the outer ring is achieved, and the situation that when equipment is used, the gap between the inner ring and the outer ring is large, dust or sundries and particles are prone to entering, and consequently the equipment is not prone to falling off when rotating is reduced. The friction force between the cylindrical rolling shaft and the inner and outer rings is increased, the equipment is easily damaged after long-time use, and the service life of the equipment is shortened, so that the practicability of the equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of needle roller bearings, in particular to a double-row needle roller bearing for a continuous casting machine. Background Art

[0002] Continuous casting machine is a production process that continuously casts high-temperature molten steel into ingots with certain cross-sectional shapes and certain dimensions. The equipment required to complete this process is called continuous casting equipment. The electromechanical and hydraulic integration of steel casting equipment, continuous casting machine equipment, cutting area equipment, dummy rod collection and conveying equipment constitutes the core equipment of continuous casting, which is usually called continuous casting machine. Needle roller bearings are roller bearings with cylindrical rollers. Relative to their diameter, the rollers are thin and long. This type of roller is called a needle roller. Despite its small cross-section, the bearing still has a high load bearing capacity. Capacity, needle roller bearings are equipped with thin and long rollers, so the radial structure is compact, its inner diameter size and load capacity are the same as other types of bearings, the outer diameter is the smallest, especially suitable for radial installation size limited support structure; according to different use occasions, can choose no inner ring bearings or needle roller and cage assembly, at this time with the bearing matching the journal surface and the shell hole surface directly as the bearing inner and outer rolling surface, to ensure the load capacity and running performance with the same ring bearing, the shaft or shell hole raceway surface hardness, processing accuracy and surface quality should be similar to the bearing ring raceway.

[0003] The prior art includes a utility model with a publication number of CN214404350U, which discloses a needle roller bearing dedicated to a continuous casting machine. The patent adopts a bearing body, and the bearing body includes an outer ring, a retaining frame, a needle roller and an inner ring. The retaining frame is located between the outer ring and the inner ring, and the two sides of the retaining frame are movably connected to the opposite side of the outer ring and the inner ring respectively, and the needle roller is movably connected to the inside of the retaining frame. An oil storage tank is provided inside the outer ring, and an oil filling hole is provided on the inner side wall of the outer ring. The oil filling hole is connected to the inside of the oil storage tank. An oil absorption block is provided inside the oil storage tank, and a lubricating brush is fixedly connected to one side of the oil absorption block, and one side of the lubricating brush overlaps the side surface of the needle roller. The utility model solves the problem that some traditional needle roller bearings mostly use direct injection or an oil filling hole to open on the surface of the bearing to achieve the purpose of adding lubricating oil. In this way, the lubricating oil is not kept for a long enough time, is easily volatilized, and the lubricating oil cannot be evenly added to the bearing surface.

[0004] In daily work, when installing equipment bearings, there is a large gap between the inner and outer rings, which makes it easy for dust or debris particles to enter. The dust or debris particles are adsorbed on the surface of the cylindrical roller, causing the friction between the cylindrical roller and the inner and outer rings to increase when the equipment is rotating. Long-term use can easily damage the equipment, resulting in a reduced service life of the equipment. Utility Model Content

[0005] The utility model aims to solve the shortcomings of the prior art that the gap between the inner and outer rings has foreign matter entering, the friction force is increased, and the service life is reduced, and a double-row needle roller bearing for a continuous casting machine is proposed.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a double-row needle roller bearing for a continuous casting machine, comprising an outer ring and a protective device, the surface of the outer ring is provided with a groove, the interior of the outer ring is provided with a connecting sleeve, the interior of the connecting sleeve is rotatably connected with a cylindrical roller, the interior of the connecting sleeve is provided with an inner ring, the protective device is arranged between the inner ring and the outer ring, the protective device comprises a first protective cover and a second protective cover, the first protective cover is arranged on a side between the outer ring and the inner ring, the second protective cover is arranged on a side away from the first protective cover, the surface of the inner ring is provided with a slot, the first protective cover is engaged with the inner wall of the slot, and the bottom of the slot is fixedly connected with a positioning rod.

[0007] Furthermore, a positioning hole is provided on the surface of the first protective cover, and the positioning rod is engaged with the inside of the positioning hole. By setting the positioning rod, the first protective cover and the inner ring can be positioned and connected, thereby reducing the possibility that the first protective cover rotates randomly when the equipment is in use, which easily increases the friction between the protective cover and the cylindrical roller.

[0008] Furthermore, a connecting column is fixedly connected to one side of the first protective cover close to the second protective cover, and a connecting hole is opened on the surface of the second protective cover, and the connecting hole is provided to facilitate the connection of the connecting column.

[0009] Furthermore, the connection column is snap-fitted with the inside of the connection hole, and a connection groove is provided on the surface of the connection hole, so that the nut can be easily connected.

[0010] Furthermore, a threaded groove is formed at one end of the connecting column away from the first protective cover, and a nut is arranged inside the connecting groove. The threaded groove is provided to facilitate the connection of the threaded rod.

[0011] Furthermore, one end of the nut is fixedly connected to a threaded rod, and an installation groove is provided at one end of the nut away from the threaded rod. The threaded rod is provided to facilitate tight connection between the second protective cover and the first protective cover.

[0012] Furthermore, a plurality of equidistant refueling holes are provided on the surface of the first protective cover, and the refueling holes are provided to facilitate refueling for the user.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are:

[0014] In the utility model, the user combines the connecting sleeve with the inside of the outer ring, and then the cylindrical roller is connected with the inner wall of the outer ring for rotation, and then the inner ring is set inside the connecting sleeve, and then the cylindrical roller is connected with the outer wall of the inner ring for rotation. When the equipment is used, the user combines the first protective cover with the inside of the card slot. When the first protective cover is combined with the card slot, the positioning rod is connected with the inside of the positioning hole to position the first protective cover. Then the first protective cover inserts the connecting column and the cylindrical roller between the first protective cover, and then when the second protective cover is combined with the inner and outer rings, the connecting column is connected with the inside of the connecting hole. Then a tool is used to rotate the installation groove to drive the nut to rotate. The rotation of the nut drives the threaded rod to rotate inside the threaded groove, and the connecting column and the second protective cover are connected. The first protective cover is provided with a protective device, which can effectively shield and protect the gap between the outer ring and the inner ring, thereby protecting the connection between the inner and outer rings. The protective device can reduce the risk of dust or debris particles entering the gap between the inner and outer rings when the equipment is in use. The friction between the cylindrical roller and the inner and outer rings increases when the equipment is rotating. The equipment can be easily damaged by long-term use, resulting in a reduction in the service life of the equipment, thereby improving the practicability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model provides a three-dimensional structural schematic diagram of a double-row needle roller bearing for a continuous casting machine;

[0016] Figure 2 The utility model provides a schematic diagram of the internal structure of a double-row needle roller bearing for a continuous casting machine;

[0017] Figure 3 The utility model proposes a double-row needle roller bearing for continuous casting machine. Figure 2 Schematic diagram of the structure at A in the middle;

[0018] Figure 4 The utility model provides a schematic diagram of the structure of a protective device for a double-row needle roller bearing for a continuous casting machine;

[0019] Figure 5 The utility model proposes a double-row needle roller bearing for continuous casting machine. Figure 4 Schematic diagram of the structure at point B in the middle.

[0020] Legend: 1. Outer ring; 2. Inner ring; 3. Groove; 4. Connecting sleeve; 5. Cylindrical roller; 6. Protective device; 61. First protective cover; 62. Second protective cover; 63. Positioning rod; 64. Positioning hole; 65. Slot; 66. Connecting column; 67. Connecting hole; 68. Connecting groove; 69. Threaded groove; 610. Nut; 611. Threaded rod; 612. Mounting groove; 7. Oiling hole. DETAILED DESCRIPTION

[0021] See also Figure 1-Figure 5 The utility model provides a technical solution: a double-row needle roller bearing for a continuous casting machine, comprising an outer ring 1 and a protective device 6, a groove 3 is provided on the surface of the outer ring 1, a connecting sleeve 4 is arranged inside the outer ring 1, a cylindrical roller 5 is rotatably connected inside the connecting sleeve 4, and an inner ring 2 is arranged inside the connecting sleeve 4.

[0022] The specific setting and function of the protective device 6 will be described in detail below.

[0023] In this embodiment: the protective device 6 is arranged between the inner ring 2 and the outer ring 1, and the protective device 6 includes a first protective cover 61 and a second protective cover 62. The first protective cover 61 is arranged on one side between the outer ring 1 and the inner ring 2, and the second protective cover 62 is arranged on a side away from the first protective cover 61. A slot 65 is opened on the surface of the inner ring 2, and the first protective cover 61 is engaged with the inner wall of the slot 65. A positioning rod 63 is fixedly connected to the bottom of the slot 65.

[0024] Specifically, a positioning hole 64 is formed on the surface of the first protective cover 61 , and the positioning rod 63 is engaged with the inside of the positioning hole 64 .

[0025] In this embodiment: by setting a positioning rod 63, the first protective cover 61 and the inner ring 2 can be positioned and connected, which reduces the situation where the first protective cover 61 rotates randomly when the equipment is in use, which easily increases the friction between the protective cover and the cylindrical roller 5.

[0026] Specifically, a connecting column 66 is fixedly connected to one side of the first protective cover 61 close to the second protective cover 62 , and a connecting hole 67 is opened on the surface of the second protective cover 62 . The connecting hole 67 is provided to facilitate the connection of the connecting column 66 .

[0027] Specifically, the connection column 66 is snap-fitted with the inside of the connection hole 67 , and a connection groove 68 is provided on the surface of the connection hole 67 . The connection groove 68 is provided to facilitate the connection of the nut 610 .

[0028] Specifically, a threaded groove 69 is formed at one end of the connecting column 66 away from the first protective cover 61 , a nut 610 is disposed inside the connecting groove 68 , and the threaded groove 69 is provided to facilitate the connection of the threaded rod 611 .

[0029] Specifically, one end of the nut 610 is fixedly connected to a threaded rod 611 , and an installation groove 612 is provided at one end of the nut 610 away from the threaded rod 611 . The threaded rod 611 is provided to facilitate tight connection between the second protective cover 62 and the first protective cover 61 .

[0030] Specifically, a plurality of equidistant refueling holes 7 are provided on the surface of the first protective cover 61 , and the refueling holes 7 are provided to facilitate refueling by the user.

[0031] Working principle: the user combines the connecting sleeve 4 with the inside of the outer ring 1, and then the cylindrical roller 5 is connected to the inner wall of the outer ring 1 by rotation, and then the inner ring 2 is set inside the connecting sleeve 4, and then the cylindrical roller is connected to the outer wall of the inner ring 2 by rotation. When the equipment is used, the user combines the first protective cover 61 with the inside of the card slot 65. When the first protective cover 61 is combined with the card slot 65, the positioning rod 63 is connected to the inside of the positioning hole 64 to position the first protective cover 61. Then the first protective cover 61 inserts the connecting column 66 between the cylindrical roller 5. Then when the second protective cover 62 is combined with the inner and outer rings 1, the connecting column 66 is connected to the inside of the connecting hole 67. Then a tool is used to rotate the installation groove 612 to drive the nut 610 to rotate. The rotation of the nut 610 drives the threaded rod 611 to rotate inside the threaded groove 69. Rotate, tightly connect the connecting column 66 with the second protective cover 62, and protect the gap between the inner and outer rings 1; when the user refuels the inside of the equipment, refuel through the refueling hole 7 on the surface of the first protective cover 61. The opening of the refueling hole 7 is convenient for the user to refuel. By setting the protective device 6, the gap between the outer ring 1 and the inner ring 2 is effectively shielded and protected, which plays a role in protecting the connection between the inner and outer rings 1, reducing the gap between the inner and outer rings 1 when the equipment is in use, which is large and easy to enter dust or debris particles. Dust or debris particles are adsorbed on the surface of the cylindrical roller 5, causing the friction between the cylindrical roller 5 and the inner and outer rings 1 to increase when the equipment is rotating. Long-term use is easy to damage the equipment, resulting in a reduction in the service life of the equipment, thereby improving the practicability of the equipment.

Claims

1. A double-row needle roller bearing for a continuous casting machine, comprising an outer ring (1) and a protective device (6), characterized in that: A groove (3) is provided on the surface of the outer ring (1), a connecting sleeve (4) is provided inside the outer ring (1), a cylindrical roller (5) is rotatably connected inside the connecting sleeve (4), an inner ring (2) is provided inside the connecting sleeve (4), the protective device (6) is provided between the inner ring (2) and the outer ring (1), the protective device (6) comprises a first protective cover (61) and a second protective cover (62), the first protective cover (61) is provided on a side between the outer ring (1) and the inner ring (2), the second protective cover (62) is provided on a side away from the first protective cover (61), a slot (65) is provided on the surface of the inner ring (2), the first protective cover (61) is engaged with an inner wall of the slot (65), and a positioning rod (63) is fixedly connected to the bottom of the slot (65).

2. The double-row needle roller bearing for continuous casting machine according to claim 1, characterized in that: A positioning hole (64) is provided on the surface of the first protective cover (61), and the positioning rod (63) is engaged with the inside of the positioning hole (64).

3. The double-row needle roller bearing for continuous casting machine according to claim 2, characterized in that: A connecting column (66) is fixedly connected to a side of the first protective cover (61) close to the second protective cover (62), and a connecting hole (67) is provided on the surface of the second protective cover (62).

4. The double-row needle roller bearing for continuous casting machine according to claim 3, characterized in that: The connecting column (66) is snap-fitted into the interior of the connecting hole (67), and a connecting groove (68) is provided on the surface of the connecting hole (67).

5. The double-row needle roller bearing for continuous casting machine according to claim 4, characterized in that: A threaded groove (69) is formed at one end of the connecting column (66) away from the first protective cover (61), and a nut (610) is disposed inside the connecting groove (68).

6. A double row needle roller bearing for a continuous casting machine according to claim 5, characterized in that: One end of the nut (610) is fixedly connected to a threaded rod (611), and an end of the nut (610) away from the threaded rod (611) is provided with a mounting groove (612).

7. The double-row needle roller bearing for continuous casting machine according to claim 6, characterized in that: A plurality of equidistant refueling holes (7) are provided on the surface of the first protective cover (61).

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