Flying shear arm and crankshaft connecting structure

Abstract

The utility model belongs to the technical field of steel rolling flying shear equipment, and relates to a flying shear arm and crankshaft connecting structure which comprises a cutter arm, a bearing and a crankshaft, the bearing and the crankshaft are arranged on the cutter arm, a labyrinth cover is arranged on one end face of the bearing, an end plate is arranged on the other end face of the bearing, and the outer side of the labyrinth cover is connected with the cutter arm; the bearing is provided with a cover on the end face of the end plate, and the outer side of the cover is connected with the tool arm. When the flying shear shears, the flying shear can have higher rotating speed, can bear larger load, improves the shearing capacity, is small in friction coefficient, long in service life and longer in maintenance period, can better prevent foreign matters from entering by using the annular seal, and can be used in a warm environment.

Description

Technical Field

[0001] The utility model belongs to the technical field of rolling flying shears, and relates to a connecting structure between a flying shear blade arm and a crankshaft. Background Art

[0002] As an indispensable part of the rolling production line, the performance stability and shearing accuracy of the flying shear are directly related to the operation efficiency of the entire steel production line and the quality of the final product. The main responsibility of the flying shear is to accurately shear and break the rolled steel to ensure that each piece of steel can reach the predetermined size and shape.

[0003] The shearing accuracy of the flying shear, which seems to be a simple parameter, actually involves many complex factors. Among them, the connection method between the blade arm and the crankshaft is particularly crucial. This connection method not only determines whether the flying shear can accurately and quickly complete the shearing action, but also affects the long-term operation stability and service life of the flying shear.

[0004] At present, the connection methods of most crank flying shears mainly rely on the combination of a crankshaft and a steel sleeve, and a copper sleeve and a blade arm. However, some problems have emerged in the actual use of this connection method. Due to the long-term friction and wear between the steel sleeve and the copper sleeve, unnecessary vibrations are generated when the blade arm is running. This vibration not only affects the clearance of the shear blade, resulting in a decrease in shearing accuracy, but also may damage other components of the equipment, reducing the overall stability of the equipment.

[0005] In addition, due to the design characteristics of this connection method, the maintenance of the equipment also faces many challenges. On the one hand, the wear rate of the steel sleeve and the copper sleeve is relatively fast, and they need to be replaced frequently, which increases the maintenance cost and time of the equipment. On the other hand, when replacing these components, it is often necessary to perform destructive demolition, which not only increases the complexity of the operation, but also may cause damage to other parts of the equipment.

[0006] Therefore, how to improve the connection method of the flying shear, improve the shearing accuracy and the stability of the equipment, and reduce the maintenance cost has become an urgent problem to be solved in the current rolling production field. Content of the Utility Model

[0007] In view of this, the purpose of the utility model is to provide a connecting structure between a flying shear blade arm and a crankshaft, which overcomes the problems of increased clearance, increased vibration, and maintenance cycle caused by the wear of the existing copper sleeve of the blade arm and the steel sleeve of the crankshaft.

[0008] To achieve the above purpose, the utility model provides the following technical solution: A connecting structure between a flying shear blade arm and a crankshaft, including a blade arm, and a bearing and a crankshaft arranged on the blade arm. A labyrinth cover is arranged on one end face of the bearing, and an end plate is arranged on the other end face. The outer side of the labyrinth cover is connected to the blade arm; a cover is also arranged on the end face of the end plate of the bearing, and the outer side of the cover is connected to the blade arm.

[0009] Optionally, a plurality of threaded holes are arranged in a circumferential direction on the outer end face of the labyrinth cover, and fasteners for connecting with the tool arm are arranged in the threaded holes.

[0010] Optionally, the end plate is connected to the crankshaft, and a plurality of light holes are uniformly arranged in a circumferential direction on its outer end face, and are fixed and pressed to the crankshaft through fasteners.

[0011] Optionally, the crankshaft is arranged in the inner cavity of the bearing, is matched with the inner ring of the bearing, and is axially positioned with the bearing.

[0012] Optionally, a labyrinth ring is further arranged on the end face of the crankshaft crank, and the labyrinth ring and the labyrinth cover are assembled to form a cavity mechanical seal.

[0013] Optionally, the bearing and the tool arm are in clearance fit.

[0014] Optionally, the bearing is axially positioned in cooperation with the labyrinth cover and the cover.

[0015] Optionally, the bearing is axially positioned in cooperation with the end plate.

[0016] Optionally, the bearing and the outer circle of the crankshaft are in interference fit.

[0017] Optionally, small holes for refueling are also penetrated through the cover, the end plate and the crankshaft.

[0018] The beneficial effects of the present utility model are as follows: the present utility model enables the flying shear to have a higher rotational speed during shearing, can withstand a larger load, improves the shearing ability, has a small friction coefficient, a long service life, and a long maintenance period, and the use of an annular seal can better prevent foreign objects from entering, and can be used in a warm environment.

[0019] Other advantages, objectives and features of the present utility model will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present utility model. The objectives and other advantages of the present utility model can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be described in detail preferably with reference to the accompanying drawings, wherein:

[0021] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0022] Figure 2 is a partial enlarged view of the present utility model.

[0023] Reference numerals: labyrinth ring 1, labyrinth cover 2, bearing 3, end plate 4, cover 5, crankshaft 6, tool arm 7. Detailed implementation manners

[0024] The following uses specific specific examples to illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concept of the present utility model. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0025] Among them, the attached drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and cannot be understood as a limitation to the present utility model; in order to better illustrate the embodiments of the present utility model, some components in the attached drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted.

[0026] In the attached drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or position relationship, it is based on the orientation or position relationship shown in the attached drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the attached drawings are only for illustrative purposes and cannot be understood as a limitation to the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] Please refer to Figures 1-2, which is a connecting structure between a flying shear arm and a crankshaft, includes a knife arm 7, a bearing 3 and a crankshaft 6 provided on the knife arm 7. A labyrinth cover 2 is provided on one end face of the bearing 3, and an end plate 4 is provided on the other end face. The outer side of the labyrinth cover 2 is connected to the knife arm 7; the bearing 3 is also provided with a cover 5 on the end face of the end plate 4, and the outer side of the cover 5 is connected to the knife arm 7. A plurality of threaded holes are arranged along the circumference on the outer side end face of the labyrinth cover 2, and fasteners for connecting with the knife arm 7 are arranged in the threaded holes. The end plate 4 is connected to the crankshaft 6, and a plurality of light holes are uniformly arranged along the circumference on its outer side end face, and are fixed and pressed with the crankshaft 6 through fasteners. The crankshaft 6 is arranged in the inner cavity of the bearing 3, is matched with the inner ring of the bearing 3, and is axially positioned with the bearing 3. The bearing 3 and the knife arm 7 are in clearance fit, and the bearing 3 is axially positioned in cooperation with the labyrinth cover 2 and the cover 5, and the bearing 3 is axially positioned in cooperation with the end plate 4. The bearing 3 and the outer circle of the crankshaft 6 are in interference fit. Small holes for refueling are also penetrated through the cover 5, the end plate 4 and the crankshaft 6.

[0028] In this embodiment, the use of the bearing 3 reduces friction and wear, can more effectively reduce the friction coefficient between the shaft and other components, reduce wear, and extend the service life; it can withstand greater radial and axial loads and adapt to heavier load working conditions; it has good heat dissipation performance: it can better dissipate the heat generated by friction during high-speed operation; it can adapt to high-speed rotation: it can better adapt to the working scenario of high rotational speed and maintain good performance; it has high rotational accuracy: it helps to ensure the precise rotation of the shaft and makes the equipment operate more smoothly and precisely.

[0029] In this embodiment, a labyrinth ring 1 is also provided on the end face of the crank throw of the crankshaft 6. The labyrinth ring 1 and the labyrinth cover 2 are assembled to form a cavity mechanical seal, which can better prevent foreign objects from entering and is resistant to high temperature.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A flying scissor arm and crankshaft connection structure, comprising a knife arm, and a bearing and a crankshaft arranged on the knife arm, characterized in that: A labyrinth cover is arranged on one end surface of the bearing, and an end plate is arranged on the other end surface, and the outer side of the labyrinth cover is connected to the knife arm; The bearing is also provided with a cover on the end surface of the end plate, and the outer side of the cover is connected to the knife arm.

2. The flying scissor arm and crankshaft connection structure according to claim 1, characterized in that: The outer end surface of the labyrinth cover is circumferentially arranged with a plurality of threaded holes, and fasteners for connecting with the knife arm are arranged in the threaded holes.

3. The flying scissor arm and crankshaft connection structure according to claim 1, characterized in that: The end plate is connected to the crankshaft, and a plurality of light holes are evenly arranged along the circumference of the outer end surface of the end plate, and the end plate is fixed and pressed to the crankshaft by fasteners.

4. The flying scissor arm and crankshaft connection structure according to claim 1, characterized in that: The crankshaft is arranged in the inner cavity of the bearing, cooperates with the inner ring of the bearing, and is axially positioned with the bearing.

5. The flying scissor arm and crankshaft connection structure according to claim 1, characterized in that: A labyrinth ring is also provided on the end face of the crankshaft throw, and the labyrinth ring is assembled with the labyrinth cover to form a cavity mechanical seal.

6. The flying scissor arm and crankshaft connection structure according to claim 1, characterized in that: The bearing and the knife arm are clearance fit.

7. The flying scissor arm and crankshaft connection structure according to claim 1, characterized in that: The bearing cooperates with the labyrinth cover and the cover for axial positioning.

8. The flying scissor arm and crankshaft connection structure according to claim 1, characterized in that: The bearing cooperates with the end plate for axial positioning.

9. The flying scissor arm and crankshaft connection structure according to claim 1, characterized in that: The bearing and the outer circle of the crankshaft are interference fit.

10. The flying scissor arm and crankshaft connection structure according to claim 1, characterized in that: Small holes for oiling are also provided through the cover, end plate and crankshaft.

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