Bolt anti-shearing structure for roller bearing seat lining plate of roughing mill

Abstract

The utility model relates to the technical field of roughing mill roller bearing seat lining plate protection, in particular to a roughing mill roller bearing seat lining plate bolt anti-shearing structure which comprises a bearing seat body, lining plates are symmetrically and fixedly installed on the two sides of the bearing seat body through bolts, and key grooves are formed in the positions, located on the four side faces of the lining plates, of the two sides of the bearing seat body. A first key bar, a second key bar, a third key bar and a fourth key bar are arranged in the key grooves respectively and fixedly connected with the bearing seat body through bolts. The utility model solves the problems that bolts for fixing the lining plate on the two sides of the bearing seat in the conventional rough rolling mill are easy to damage and lose fastening and positioning effects under the influence of shearing force for a long time, so that the lining plate is loosened and even falls off, and rolling accidents are caused in serious cases.

Description

Technical Field

[0001] This utility model relates to the field of protection technology for roughing mill roll bearing seat liner plates, specifically to a bolt anti-shear structure for roughing mill roll bearing seat liner plates. Background Technology

[0002] Hot-rolled coil production lines typically have one or more roughing mills, usually four-high mills, including upper and lower support rolls and upper and lower work rolls. Roughing mills are reversible mills; the rolls need to rotate in both directions multiple times to roll the slab to the required thickness. The roll bearing housings have liners on both sides, fixed to the housing body with several bolts, which cooperate with the liners of the mill stand to restrict the position of the rolls.

[0003] The mill stand for upper and lower work rolls is an integral structure. The work roll bearing housing needs to move up and down to control the slab thickness. There is a certain gap between the work roll bearing housing and the mill stand. When the gap exceeds the standard, or when the roll axis intersects, the mill drive components will exert a large axial force on the work roll, causing the bearing housing to repeatedly move laterally within the stand. During the up-and-down or back-and-forth movement of the work roll bearing housing within the stand, the liner fastening bolts on the housing will be subjected to shear force. Over a long period, the bolts will fail due to shearing, causing the liner to loosen or even fall off, leading to roll instability or even rolling accidents.

[0004] The mill stand with upper and lower support rolls is a split structure. Its bearing seat liner structure is the same as that of the work roll, which will also produce frequent displacements similar to those of the work roll, resulting in similar defects. Utility Model Content

[0005] The technical problem this invention aims to solve is that the bolts used to fix the liner plates on both sides of the bearing housing in existing roughing mills are easily damaged under the influence of shear force over a long period of time, losing their tight fixing effect, leading to loosening or even falling off of the liner plates, and in severe cases, causing rolling accidents.

[0006] To solve the above problems, the technical solution adopted by this utility model is a bolt anti-shear structure for the bearing seat liner of a roughing mill roll, including a bearing seat body, on both sides of the bearing seat body, liners are symmetrically installed and fixed by bolts, and keyways are provided on the four sides of the liner on both sides of the bearing seat body. Keyways are respectively provided with key strip one, key strip two, key strip three, and key strip four, and all of them are connected and fixed to the bearing seat body by bolts.

[0007] As a further embodiment of this utility model: the keyway depth is 10mm, and key strips one, two, three, and four all transitionally fit with the keyway to ensure stable installation.

[0008] As a further embodiment of this utility model: the outer sides of key strip 1, key strip 2, key strip 3, and key strip 4 are fully welded to the side of the bearing housing body, so that they can be combined with the bearing housing body to form an integral whole.

[0009] As a further embodiment of this utility model: the distance between the surface of the liner and the top surfaces of key strip 1, key strip 2, key strip 3, and key strip 4 is 5mm. During installation, the contact is mainly made through the liner.

[0010] As a further embodiment of this utility model: the top surface of key bar 1, key bar 2, key bar 3, and key bar 4 is 20mm away from the side of the bearing seat body where a liner plate is fixed.

[0011] As a further embodiment of this utility model, the fit clearance between the liner and key strips one, two, three, and four is 0.1 to 0.2 mm, which can tightly fix the position of the liner and prevent it from shifting.

[0012] As a further solution of this utility model: the length of key bar 2 and key bar 4 is relatively short because there is a protective plate mounting groove installed below the bearing housing body, so key bar 2 and key bar 4 need to be shortened to reserve space.

[0013] Compared with the prior art, the advantages of this utility model are as follows: by setting a limiting key strip around the liner plate, this utility model can reduce the shear force on the bolts fixing the liner plate, thereby increasing the service life of the liner plate positioning bolts and improving the safety of the rolling mill body. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a front view of the installation position of the key bar and the liner plate in the anti-shear structure of the liner plate bolt of a roughing mill roll bearing seat according to this utility model.

[0016] Figure 2 This is a side view of the installation position of the key bar and the liner plate in the anti-shear structure of the liner plate bolt of a roughing mill roll bearing seat according to this utility model.

[0017] In the attached image:

[0018] 1. Bearing housing body; 2. Liner plate; 3. Key bar one; 4. Key bar two; 5. Key bar three; 6. Key bar four. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] This utility model provides a technical solution to address the existing problems mentioned in the background art.

[0021] Combined with appendix Figure 1 , 2 It can be seen that the bearing housing body 1 is included, and the bearing housing body 1 is symmetrically fixed with liner plates 2 by bolts on both sides. Keyways are provided on the four sides of the liner plates 2 on both sides of the bearing housing body 1. Key strip 1 3, key strip 2 4, key strip 3 5, and key strip 4 6 are respectively provided in the keyways, and all of them are connected and fixed to the bearing housing body 1 by bolts.

[0022] The keyway depth is 10mm. Key bars 1 (3), 2 (4), 3 (5), and 4 (6) all transition fit with the keyway to ensure stable installation. The outer sides of key bars 1 (3), 2 (4), 3 (5), and 4 (6) are fully welded to the side of the bearing housing body 1, allowing them to be combined into a single unit. The surface of the liner 2 is 5mm away from the top surface of key bars 1 (3), 2 (4), 3 (5), and 4 (6). During installation, contact is mainly achieved through the liner 2. The top surface of key strip 2 (4), key strip 3 (5), and key strip 4 (6) is 20mm away from the side of the bearing housing body 1 where the liner 2 is fixed; the fit clearance between the liner 2 and key strip 1 (3), key strip 2 (4), key strip 3 (5), and key strip 4 (6) is 0.1 to 0.2mm, which can tightly fix the position of the liner 2 and prevent it from shifting; key strip 2 (4) and key strip 4 (6) are relatively short because there is a guard plate mounting groove installed under the bearing housing body 1, so key strip 2 (4) and key strip 4 (6) need to be shortened to leave space.

[0023] The working principle of this application is as follows: First, keyways are machined around the bearing housing body 1 with a machining depth of 10mm. Then, several mounting screw holes are machined on the side of the keyways. Then, key strips 1-3, 2-4, 3-5, and 4-6 are made and transitionally fitted with the keyways. They are then installed and fixed with bolts. Next, the outer sides of key strips 1-3, 2-4, 3-5, and 4-6 are fully welded to the outer side of the bearing housing body 1 for further fixation. The inner sides are not welded. The distance between the surface of the liner plate 2 and the top surface of the key strips is 5mm. The top surface of the key strips protrudes 20mm above the body.

[0024] When the rolling mill is working, the bearing housing body 1 is displaced. Through the limiting of key bar 3, key bar 4, key bar 5, and key bar 6, the shear force on the bolts fixing the liner plate 2 can be reduced, thus improving the service life.

[0025] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A bolt anti-shear structure for bearing liner plates of a roughing mill roll, comprising a bearing liner body (1), wherein liners (2) are symmetrically installed and fixed on both sides of the bearing liner body (1) by bolts, characterized in that: The bearing housing body (1) has keyways on all four sides of the liner (2). Keyways are provided with key strip 1 (3), key strip 2 (4), key strip 3 (5), and key strip 4 (6), and are connected and fixed to the bearing housing body (1) by bolts.

2. The anti-shear structure for bolts on the bearing seat liner of a roughing mill roll according to claim 1, characterized in that: The keyway is 10mm deep, and key strips 1 (3), 2 (4), 3 (5), and 4 (6) all transition into the keyway.

3. The anti-shear structure for bolts on the bearing seat liner of a roughing mill roll according to claim 1, characterized in that: The outer sides of key strip one (3), key strip two (4), key strip three (5), and key strip four (6) are fully welded to the side of the bearing housing body (1).

4. The anti-shear structure for bolts on the bearing seat liner of a roughing mill roll according to claim 1, characterized in that: The distance between the surface of the liner (2) and the top surfaces of key strip one (3), key strip two (4), key strip three (5), and key strip four (6) is 5mm.

5. The anti-shear structure for bolts on the bearing seat liner of a roughing mill roll according to claim 1, characterized in that: The top surfaces of key strip one (3), key strip two (4), key strip three (5), and key strip four (6) are 20mm away from the side of the bearing seat body (1) where the liner plate (2) is fixed.

6. The anti-shear structure for bolts on the bearing seat liner of a roughing mill roll according to claim 1, characterized in that: The fit clearance between the liner (2) and key strip one (3), key strip two (4), key strip three (5), and key strip four (6) is 0.1 to 0.2 mm.

7. The anti-shear structure for bolts on the bearing seat liner of a roughing mill roll according to claim 1, characterized in that: The second key bar (4) and the fourth key bar (6) are relatively short.

Images