Roller end shaft sleeve with long service life

Abstract

The utility model discloses a roller end shaft sleeve with long service life. The roller end shaft sleeve comprises a shaft sleeve body, two symmetrically arranged lining plates and a fastener, an inner hole of the cross section of the shaft sleeve body is formed by mutually connecting two sections of arc surfaces which are symmetrical front and back and two sections of non-right-angle lining plate grooves which are symmetrical up and down; the non-right-angle lining plate groove is of a symmetrical structure and is formed by sequentially connecting a key groove, a plane, a fillet and an inclined face from the middle to the outside. The lining plate is of a symmetrical structure, the protruding portion of the lining plate is embedded into the key groove, the shoulder portion is attached to the plane, and gaps exist between the side face and the fillet and the inclined face. The arc surface and the non-right-angle lining plate groove are in fillet transition; the fastener is connected with the shaft sleeve body and the lining plate. By optimizing the lining plate groove structure of the shaft sleeve body, the stress concentration of the shaft sleeve is effectively reduced, and the service life of the shaft sleeve is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of transmission shaft manufacturing, in particular to a roller end sleeve structure. Background Art

[0002] With the continuous development of metallurgical transmission technology, the requirements for metallurgical transmission equipment are getting higher and higher, and new requirements are put forward for the life, stability and reliability of the equipment. The roll end sleeve is an important component connecting the rolling mill in the transmission shaft. Since it is closest to the rolling mill track during operation, its working conditions are quite harsh, including corrosion, high temperature, impact, etc., so it is particularly important to improve the performance of the sleeve.

[0003] like Figure 6 As shown, the structure of the existing roller end sleeve connected to the roller is: a right-angle groove is set at the top and bottom of the inner hole of the sleeve body, and the liner is set in the groove and connected to the sleeve through fasteners. The disadvantages of this structure are: 1. The liner is positioned by the right-angle surfaces on both sides of the liner groove and a number of bolts. During rolling and rotation, the right-angle root of the liner groove is a stress concentration site, resulting in cracks in the R angle at the root of the liner groove, affecting the service life of the sleeve and the shaft connection; 2. After long-term use, the bolts are loose, the side of the liner groove is seriously worn, the matching clearance in the sleeve becomes larger, and the shaking of the shaft connection also leads to a decrease in the quality of rolled steel; 3. The arc surface in the flat hole of the sleeve and the liner surface are not lubricated, resulting in increased wear of the sleeve and the roller, causing the roller to shake in the roller end sleeve, losing the centering accuracy, and affecting the quality of rolled steel; 4. The inner hole of the roller end sleeve needs to be repaired frequently, which wastes time and increases costs. Utility Model Content

[0004] The problem solved by the utility model is to provide a roller end sleeve, which effectively reduces the stress concentration of the sleeve by optimizing the liner groove structure of the sleeve body, thereby extending the service life of the sleeve. At the same time, it fully lubricates the interior of the sleeve and the liner by setting a lubricating oil circuit, thereby extending the service life of the sleeve, the liner and the roller, and ensuring the rolling quality. In addition, it also improves the assembly efficiency of the liner and the sleeve body.

[0005] The utility model discloses a roller end shaft sleeve with a long service life, which comprises a shaft sleeve body, two symmetrically arranged lining plates and a fastener; the inner hole of the shaft sleeve body cross section is formed by two sections of circular arc surfaces which are symmetrical in front and back and two sections of non-right-angled lining plate grooves which are symmetrical in top and bottom, connected to each other; the non-right-angled lining plate groove is a symmetrical structure, which is formed by a keyway, a plane, a fillet and a beveled surface which are connected in sequence from the middle to the outside; the lining plate is a symmetrical structure, the protrusion of which is embedded in the keyway, the shoulder is fitted with the plane, and there is a gap between the side surface and the fillet and the beveled surface; the circular arc surface and the non-right-angled lining plate groove are transitioned through the fillet; the fastener connects the shaft sleeve body and the lining plate.

[0006] Furthermore, the contacting side surfaces of the protrusion and the keyway are both subjected to quenching treatment.

[0007] Furthermore, the roller end sleeve also includes a lubricating oil circuit, which includes four radial oil holes, which are evenly distributed along the circumference of the sleeve body, two of which are perpendicular to the middle of the arc surface, and the other two are perpendicular to the keyway.

[0008] Furthermore, the arc surface is provided with crisscrossed oil grooves, and the radial oil holes are connected to the oil grooves.

[0009] Furthermore, the lubricating oil circuit also includes a sub-oil circuit on the lining plate, the sub-oil circuit includes an oil groove and multiple radial oil holes, the oil groove is arranged along the length direction of the upper surface of the protrusion and is not connected with both ends, and multiple radial oil holes are arranged in the oil groove, and the radial oil holes open to the large plane of the lining plate.

[0010] Furthermore, the sub-oil channel also includes crisscross oil grooves, the large plane is provided with crisscross oil grooves, and the radial oil holes are communicated with the oil grooves.

[0011] Furthermore, a threaded blind hole is provided on the outer end surface of the lining plate.

[0012] The advantages of the roller end sleeve of the utility model are: first, by optimizing the liner groove structure of the sleeve body, that is, changing the right-angle liner groove into a non-right-angle liner groove combining a rounded corner and a bevel, the stress concentration at this location is reduced; at the same time, the positioning of the sleeve and the sleeve body is achieved by the cooperation of the protrusion and the keyway. Since the stress at the keyway in the middle of the non-right-angle liner groove is relatively small, stress concentration is avoided, the use stability of the sleeve is improved, and the service life of the sleeve and the connecting shaft is extended; second, by setting a lubricating oil circuit, the lubricating grease can fully lubricate the inside of the sleeve and the liner, delaying the wear of the liner and the sleeve body, the wear of the sleeve and the roller, improving the use stability of the sleeve, extending the service life of the sleeve, the liner and the roller, and ensuring the rolling quality; third, by setting a threaded blind hole, the assembly efficiency of the liner and the sleeve body is improved; fourth, the time for repairing the inner hole of the roller end sleeve is reduced, and the cost is reduced.

[0013] In short, the roller end sleeve of the utility model reduces stress concentration, fully lubricates the inside of the sleeve and the liner, prolongs the service life of the roller end sleeve and the connecting shaft, ensures stable operation of the rolling mill, and ensures high-quality production of the steel enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the front view of the roller end sleeve of the utility model;

[0015] Figure 2 yes Figure 1 Left view of;

[0016] Figure 3 It is a three-dimensional diagram of the roller end sleeve of the utility model;

[0017] Figure 4 It is the three-dimensional Figure 1 ;

[0018] Figure 5 It is the three-dimensional Figure 2 ;

[0019] Figure 6 It is a schematic diagram of an existing shaft sleeve in the background technology. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0021] Example 1

[0022] from Figure 1 , Figure 2 , Figure 3 , Figure 4 It can be seen that the utility model is a roller end sleeve with a long service life, which includes a sleeve body 1, two symmetrically arranged liners 2, and a fastener 3; the inner hole of the cross section of the sleeve body 1 is formed by two sections of circular arc surfaces 11 symmetrically arranged in front and back and two sections of non-right-angled liner grooves 12 symmetrically arranged in top and bottom, which are connected to each other; the non-right-angled liner groove 12 is a symmetrical structure, which is connected in sequence from the middle to the outside by a keyway 121, a plane 122, a fillet 123, and a bevel 124; the liner 2 is a symmetrical structure, its protrusion 21 is embedded in the keyway 121, the shoulder 22 is fitted with the plane 122, and there is a gap between the side 28 and the fillet 123 and the bevel 124; the circular arc surface 11 and the non-right-angled liner groove 12 are transitioned by a fillet; the fastener 3 connects the sleeve body 1 and the liner 2.

[0023] The utility model roller end shaft sleeve: the part of the non-right angle liner groove 12 located on the two side surfaces of the liner 2 is a structure combining a rounded corner 123 and a bevel 124, which effectively reduces the stress concentration at this location; at the same time, the non-right angle liner groove 12 realizes the positioning of the liner 2 and the shaft sleeve body through the keyway 121 in the middle and the protrusion 21 of the liner 2. Since the stress at the keyway 121 in the middle of the non-right angle liner groove 12 is relatively small, stress concentration is avoided, thereby extending the service life of the roller end shaft sleeve and the connecting shaft, and ensuring the normal production and rolling quality of the rolling mill.

[0024] The contacting sides of the protrusion 21 and the keyway 121 are both quenched to improve the surface wear resistance, delay wear, extend the service life of the roller end sleeve, and ensure the normal production and rolling quality of the rolling mill.

[0025] Example 2

[0026] from Figure 1 , Figure 2 , Figure 3 , Figure 4It can be seen that the roller end sleeve of the utility model also includes a lubricating oil circuit, which includes four radial oil holes 13, and the radial oil holes 13 are evenly distributed along the circumference of the sleeve body 1, two of which are perpendicular to the middle of the arc surface 11, and the other two radial oil holes 13 are perpendicular to the keyway 121.

[0027] Lubricating grease is injected from the four radial oil holes 13 on the sleeve body 1 to fully lubricate the inside of the sleeve and the liner, thereby delaying the wear of the sleeve and the roller, improving the stability of the sleeve, extending the service life of the sleeve, the liner and the roller, and ensuring the rolling quality.

[0028] Example 3

[0029] from Figure 1 , Figure 2 , Figure 3 , Figure 4 It can be known that the roller end sleeve of the utility model has the oil grooves 14 arranged in a crisscross pattern on the arc surface 11 , and the radial oil holes 13 are connected to the oil grooves 14 .

[0030] The lubricating grease reaches the oil groove 14 through the radial oil hole 13, which expands the lubrication range, makes the inside of the sleeve fully lubricated, delays the wear of the sleeve and the roller, improves the stability of the sleeve, extends the service life of the sleeve, liner and roller, and ensures the rolling quality.

[0031] Example 4

[0032] from Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 It can be known that the roller end sleeve of the utility model: the lubricating oil circuit also includes a sub-oil circuit on the liner 2, the sub-oil circuit includes an oil groove 23 and a plurality of radial oil holes 24, the oil groove 23 is arranged along the length direction of the upper surface of the protrusion 21 and is not connected with both ends, and a plurality of radial oil holes 24 are arranged in the oil groove 23, and the radial oil holes 24 open to the large plane 25 of the liner 2.

[0033] The lubricating grease reaches the oil groove 23 through the radial oil hole 13 and then reaches the inside of the sleeve along the radial oil hole 24, so that the inside of the sleeve and the liner are fully lubricated, delaying the wear of the sleeve and the roller, improving the stability of the sleeve, extending the service life of the sleeve, liner and roller, and ensuring the rolling quality.

[0034] Example 5

[0035] from Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5It can be known that the roller end sleeve of the utility model: the sub-oil path also includes crisscross oil grooves 26 , the large plane 25 is provided with crisscross oil grooves 26 , and the radial oil holes 24 are communicated with the oil grooves 26 .

[0036] The lubricating grease reaches the oil groove 26 through the radial oil hole 13, the oil groove 23 and the radial oil hole 24, which expands the range of lubrication, makes the inside of the sleeve and the liner plate fully lubricated, delays the wear of the sleeve and the roller, improves the stability of the sleeve, extends the service life of the sleeve, the liner plate and the roller, and ensures the rolling quality.

[0037] Example 6

[0038] from Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 It can be seen that the roller end sleeve of the utility model has a threaded blind hole 27 disposed on the outer end surface of the liner 2 .

[0039] The blind hole 27 can be used to conveniently lift the liner 2 during assembly, thereby improving the assembly efficiency between the liner 2 and the shaft sleeve body 1 .

[0040] The advantages of the roller end sleeve of the utility model are: first, by optimizing the liner groove structure of the sleeve body, that is, changing the right-angle liner groove into a non-right-angle liner groove combining a rounded corner and a bevel, the stress concentration at this location is reduced; at the same time, the positioning of the sleeve and the sleeve body is achieved by the cooperation of the protrusion and the keyway. Since the stress at the keyway in the middle of the non-right-angle liner groove is relatively small, stress concentration is avoided, the use stability of the sleeve is improved, and the service life of the sleeve and the connecting shaft is extended; second, by setting a lubricating oil circuit, the lubricating grease can fully lubricate the inside of the sleeve and the liner, delaying the wear of the liner and the sleeve body, the wear of the sleeve and the roller, improving the use stability of the sleeve, extending the service life of the sleeve, the liner and the roller, and ensuring the rolling quality; third, by setting a threaded blind hole, the assembly efficiency of the liner and the sleeve body is improved; fourth, the time for repairing the inner hole of the roller end sleeve is reduced, and the cost is reduced.

[0041] In short, the roller end sleeve of the utility model reduces stress concentration, fully lubricates the inside of the sleeve and the liner, prolongs the service life of the roller end sleeve and the connecting shaft, ensures stable operation of the rolling mill, and ensures high-quality production of the steel enterprise.

Claims

1. A roller end sleeve with a long service life, characterized by: It comprises a shaft sleeve body (1), two symmetrically arranged lining plates (2), and a fastener (3); the inner hole of the cross section of the shaft sleeve body (1) is formed by two front-to-back symmetrical arc surfaces (11) and two upper-lower symmetrical non-right-angle lining plate grooves (12) connected to each other; the non-right-angle lining plate groove (12) is a symmetrical structure, and is formed by a keyway (121), a plane (122), a fillet (123), and a bevel (124) connected in sequence from the middle to the outside; the lining plate (2) is a symmetrical structure, and its protrusion (21) is embedded in the keyway (121), the shoulder (22) is fitted with the plane (122), and there is a gap between the side surface (28) and the fillet (123) and the bevel (124); the arc surface (11) and the non-right-angle lining plate groove (12) are transitioned through the fillet; the fastener (3) connects the shaft sleeve body (1) and the lining plate (2).

2. The roller end sleeve according to claim 1, characterized in that: The contacting sides of the protrusion (21) and the key groove (121) are both subjected to quenching treatment.

3. The roller end sleeve according to claim 1, characterized in that: The roller end sleeve also includes a lubricating oil circuit, which includes four first radial oil holes (13). The first radial oil holes (13) are evenly distributed along the circumference of the sleeve body (1), wherein the first two radial oil holes (13) are perpendicular to the middle of the arc surface (11), and the other two first radial oil holes (13) are perpendicular to the keyway (121).

4. The roller end sleeve according to claim 3 is characterized in that: The arc surface (11) is provided with first oil grooves (14) arranged in a crisscross pattern, and the first radial oil holes (13) are connected to the first oil grooves (14).

5. The roller end sleeve according to claim 3, characterized in that: The lubricating oil circuit also includes a sub-oil circuit on the lining plate (2), the sub-oil circuit including a second oil groove (23) and a plurality of second radial oil holes (24), the second oil groove (23) being arranged along the length direction of the upper surface of the protruding portion (21) and not interpenetrating with both ends, the second oil groove (23) being arranged with a plurality of second radial oil holes (24), the second radial oil holes (24) opening on the large plane (25) of the lining plate (2).

6. The roller end sleeve according to claim 5, characterized in that: The sub-oil channel also includes a third oil groove (26) arranged in a crisscross pattern. The third oil groove (26) arranged in a crisscross pattern is arranged on the large plane (25). The second radial oil hole (24) is in communication with the third oil groove (26).

7. The roller end sleeve according to claim 1, characterized in that: The outer end surface of the lining plate (2) is provided with a threaded blind hole (27).

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