Eccentric sleeve assembly of precision rolling mill

Abstract

The utility model discloses an eccentric sleeve assembly of a precision rolling mill, and relates to the technical field of rolling mill parts, the eccentric sleeve assembly comprises a transition sleeve, a bearing sleeve, a supporting plate and an inner eccentric sleeve, the transition sleeve and the bearing sleeve are integrally formed, and the bearing sleeve and the inner eccentric sleeve are connected to the two sides of the supporting plate in a positioning mode. The bearing sleeve and the transition sleeve are integrally designed, so that the problem of poor coaxiality precision caused by assembly errors of the bearing sleeve and the transition sleeve which are designed in a traditional split manner is solved, and the assembly efficiency and the assembly precision of a product are greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of rolling mill parts, and in particular to an eccentric sleeve assembly of a precision rolling mill. Background Art

[0002] The existing star-shaped precision rolling mill has a diameter adjustment device composed of multiple eccentric sleeve assemblies, a long shaft assembly arranged in the eccentric sleeve assembly, and an adjustment mechanism that engages with the bevel teeth of the eccentric sleeve assembly. The eccentric sleeve assembly includes parts such as a transition sleeve, a support plate, a bearing sleeve, and an inner eccentric sleeve. Since the transition sleeve and the bearing sleeve are positioned and connected with locating pins and screws, each time the eccentric sleeve assembly is assembled, the coaxiality accuracy of the transition sleeve and the bearing sleeve is affected due to assembly errors, which makes it difficult to install the long shaft assembly into the transition sleeve and the bearing sleeve, thereby affecting the assembly efficiency. Utility Model Content

[0003] The main purpose of this application is to provide an eccentric sleeve assembly for a precision rolling mill, aiming to solve the problem in the prior art that the separate design of the transition sleeve and the bearing sleeve is difficult to ensure assembly accuracy.

[0004] The technical solutions adopted in this application are as follows:

[0005] An eccentric sleeve assembly for a precision rolling mill comprises a transition sleeve, a bearing sleeve, a support plate and an inner eccentric sleeve. The transition sleeve and the bearing sleeve are integrally formed, and the bearing sleeve and the inner eccentric sleeve are positioned and connected to both sides of the support plate.

[0006] Optionally, the support plate includes a first support plate and a second support plate arranged opposite to each other, the first support plate is positioned and connected to the bearing sleeve via a positioning pin and a screw, and the second support plate is positioned and connected to the inner eccentric sleeve via a positioning pin and a screw.

[0007] Optionally, a positioning support block is provided between the first support plate and the second support plate, and the positioning support block is screw-connected to the first support plate and the second support plate respectively.

[0008] Optionally, a set of double-row roller bearings are assembled in the bearing sleeve and the inner eccentric sleeve, and a tail cone is also provided in the inner eccentric sleeve.

[0009] Optionally, a labyrinth sealing structure is used between the inner ring of the double-row roller bearing and the first support plate and the second support plate.

[0010] Optionally, the outer circle of the tail cone is connected to the inner hole of the double row roller bearing through a key, the outer circle of the tail cone is designed with an involute external spline, and the inner hole of the double row roller bearing is designed with an internal thread.

[0011] Optionally, the transition sleeve, the bearing sleeve and the tail cone are coaxially arranged.

[0012] Optionally, the aperture of the tail cone is smaller than the aperture of the bearing sleeve.

[0013] Optionally, a pressure ring is fixedly provided at one end of the transition sleeve away from the bearing sleeve via a stud.

[0014] Optionally, the transition sleeve is provided with a variable diameter inner hole, the diameter of the variable diameter inner hole at the end connected to the bearing sleeve is the same as the diameter of the bearing sleeve, and the diameter of the variable diameter inner hole at the end away from the bearing sleeve is larger than the diameter of the bearing sleeve.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] An eccentric sleeve assembly for a precision rolling mill proposed in an embodiment of the present application solves the problem of poor coaxiality accuracy caused by assembly errors in traditional split-type bearing sleeves and transition sleeves by designing the bearing sleeve and transition sleeve as an integrated design, thereby greatly improving the assembly efficiency and assembly accuracy of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of the eccentric sleeve assembly of the precision rolling mill provided in an embodiment of the present application from one perspective.

[0018] Description of the reference numerals in the accompanying drawings:

[0019] 1-transition sleeve, 2-support plate, 201-first support plate, 202-second support plate, 3-bearing sleeve, 4-inner eccentric sleeve, 5-tail cone, 6-positioning support plate, 7-double row roller bearing, 8-pressure ring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0021] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0024] Refer to the attached Figure 1 The embodiment of the present application provides an eccentric sleeve assembly for a precision rolling mill, comprising a transition sleeve 1, a support plate 2, a bearing sleeve 3 and an inner eccentric sleeve 4, wherein the transition sleeve 1 and the bearing sleeve 3 are integrally cast, and the transition sleeve 1 is provided with a variable diameter inner hole along the axis, the diameter of the variable diameter inner hole at the end connected to the bearing sleeve 3 is the same as the diameter of the bearing sleeve 3, and the diameter of the variable diameter inner hole at the end away from the bearing sleeve 3 is larger than the diameter of the bearing sleeve 3. The end face of the transition sleeve 1 away from the bearing sleeve 3 is fixed with a pressure ring 8 by a double-headed stud, and the pressure ring 8 is used to fix the long axis assembly inserted into the bearing sleeve 3 and the transition sleeve 1. It can be imagined that by integrally casting the bearing sleeve 3 and the transition sleeve 1, the problem of poor coaxiality accuracy caused by assembly errors of the bearing sleeve 3 and the transition sleeve 1 of the traditional split design is solved, which helps to improve the assembly efficiency and assembly accuracy of the product.

[0025] In the above description, the support plate 2 is positioned and connected between the bearing sleeve 3 and the inner eccentric sleeve 4, wherein the support plate 2 includes a first support plate 201 and a second support plate 202. The first support plate 201 is positioned and connected to the bearing sleeve 3 via a locating pin and screws, and the second support plate 202 is positioned and connected to the inner eccentric sleeve 4 via a locating pin and screws. A positioning support plate 62 is provided between the outer ends of the first support plate 201 and the second support plate 202, and the two ends of the positioning support plate 62 are positioned and connected to the first support plate 201 and the second support plate 202 via screws, respectively. The surfaces of the bearing sleeve 3 and the inner eccentric sleeve 4 are designed with bevel teeth. After the multiple eccentric sleeve assemblies are assembled in the main frame of the rolling mill, the eccentric sleeve assemblies engage with each other via the bevel teeth.

[0026] A double-row roller bearing 7 is mounted on the inner sides of both the bearing sleeve 3 and the inner eccentric sleeve 4. A labyrinth seal is employed between the inner ring of the double-row roller bearing 7 and the first and second support plates 201 and 202 to prevent water and scale from infiltrating the mill's mainframe bearings. A tail cone 5 is also positioned within the end of the inner eccentric sleeve 4 distal from the bearing sleeve 3. The transition sleeve 1, bearing sleeve 3, and tail cone 5 are coaxially arranged, and the aperture of the tail cone 5 is smaller than that of the bearing sleeve 3. The outer diameter of the tail cone 5 is keyed to the inner bore of the double-row roller bearing 7. Specifically, the outer diameter of the tail cone 5 is designed with an involute external spline, while the inner bore of the double-row roller bearing 7 is internally threaded.

[0027] To sum up, the eccentric sleeve assembly of a precision rolling mill provided in an embodiment of the present application solves the problem of poor coaxiality accuracy of the bearing sleeve 3 and the transition sleeve 1 of the traditional split design due to assembly errors by designing the bearing sleeve 3 and the transition sleeve 1 as an integrated design, thereby greatly improving the assembly efficiency and assembly accuracy of the product.

[0028] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An eccentric sleeve assembly for a precision rolling mill, characterized in that: It includes a transition sleeve, a bearing sleeve, a support plate and an inner eccentric sleeve. The transition sleeve and the bearing sleeve are integrally formed. The bearing sleeve and the inner eccentric sleeve are positioned and connected to both sides of the support plate.

2. The eccentric sleeve assembly of the precision rolling mill according to claim 1, characterized in that: The support plate includes a first support plate and a second support plate arranged opposite to each other. The first support plate is positioned and connected to the bearing sleeve via a positioning pin and a screw, and the second support plate is positioned and connected to the inner eccentric sleeve via a positioning pin and a screw.

3. The eccentric sleeve assembly of the precision rolling mill according to claim 2, characterized in that: A positioning support block is provided between the first support plate and the second support plate, and the positioning support block is screw-connected to the first support plate and the second support plate respectively.

4. The eccentric sleeve assembly of the precision rolling mill according to claim 2, characterized in that: A set of double-row roller bearings is assembled in the bearing sleeve and the inner eccentric sleeve, and a tail cone is also arranged in the inner eccentric sleeve.

5. The eccentric sleeve assembly of the precision rolling mill according to claim 4, characterized in that: A labyrinth sealing structure is adopted between the inner ring of the double-row roller bearing and the first support plate and the second support plate.

6. The eccentric sleeve assembly of the precision rolling mill according to claim 4, characterized in that: The outer circle of the tail cone is connected to the inner hole of the double-row roller bearing through a key. The outer circle of the tail cone is designed with an involute external spline, and the inner hole of the double-row roller bearing is designed with an internal thread.

7. The eccentric sleeve assembly of the precision rolling mill according to claim 4, characterized in that: The transition sleeve, the bearing sleeve and the tail cone are coaxially arranged.

8. The eccentric sleeve assembly of the precision rolling mill according to claim 4, characterized in that: The aperture of the tail cone is smaller than the aperture of the bearing sleeve.

9. The eccentric sleeve assembly of the precision rolling mill according to claim 1, characterized in that: A pressure ring is fixedly provided on one end of the transition sleeve away from the bearing sleeve via a stud.

10. The eccentric sleeve assembly of the precision rolling mill according to claim 1, characterized in that: The transition sleeve is provided with a variable diameter inner hole, the diameter of the variable diameter inner hole at the end connected to the bearing sleeve is the same as the diameter of the bearing sleeve, and the diameter of the variable diameter inner hole at the end away from the bearing sleeve is larger than the diameter of the bearing sleeve.

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