Universal spindle balancing device and rolling mill equipment

Abstract

The invention discloses a universal spindle balancing device and rolling mill equipment. The universal spindle balancing device comprises a base, an upper supporting mechanism, a lower supporting mechanism, an upper balancing hydraulic cylinder, a lower balancing hydraulic cylinder, an upper balancing lever and a lower balancing lever. A first connecting part and a second connecting part are respectively arranged on two sides of the base; the upper supporting mechanism and the lower supporting mechanism are arranged above the base in parallel and between the first connecting part and the second connecting part; the upper balance hydraulic cylinder and the lower balance hydraulic cylinder are arranged on the first connecting part in a staggered mode. One end of the upper balance lever is hinged with the rod head of the upper balance hydraulic cylinder, the other end is hinged with the second connecting part, and the middle part is hinged with the upper supporting mechanism; one end of the lower balance lever is hinged to the rod head of the lower balance hydraulic cylinder, the other end is hinged to the second connecting part, and the middle of the lower balance lever is hinged to the lower supporting mechanism. According to the universal spindle balancing device, the position of the balancing hydraulic cylinder is redesigned, and the stress structure of equipment is optimized, so that the equipment is convenient to maintain and repair, and the maintainability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of large rolling mills, and in particular to a universal joint shaft balancing device and rolling mill equipment. Background Art

[0002] In recent years, as my country's steel industry production lines have been continuously upgraded to high-quality products, rolling mills, as the main equipment of the production line, have also tended to develop towards large-scale. As the rolling mills become larger, the weight of the universal joints in the rolling mill transmission also increases. The increase in the weight of the universal joints will cause the roller system to be heavier, which will directly affect the quality of the products produced.

[0003] In order to reduce the impact of the universal joint on product quality, a universal joint shaft balancing device is essential. For example, the Chinese patent with the announcement number CN202037180 U shows a universal joint shaft balancing device for a hot plate roughing mill. As can be seen from the attached drawings, the balancing hydraulic cylinder of the universal joint shaft balancing device is arranged directly below the bearing seat, which is not convenient for the maintenance of the equipment, especially the balancing hydraulic cylinder. Summary of the invention

[0004] The purpose of the present invention is to provide a universal joint shaft balancing device and rolling mill equipment, by redesigning the position of the balancing hydraulic cylinder and optimizing the force structure of the equipment, so that the equipment is more convenient to maintain and overhaul, and the maintainability of the equipment is improved.

[0005] The purpose of the present invention is achieved by the following technical solutions: A universal joint shaft balancing device, comprising: A base, wherein a first connecting portion and a second connecting portion are respectively provided on two sides of the base; Upper and lower holding mechanisms are arranged in parallel above the base and between the first and second connecting parts; Upper and lower balancing hydraulic cylinders are staggered and arranged on the first connecting portion; An upper balancing lever, one end of which is hinged to the rod head of the upper balancing hydraulic cylinder, the other end of which is hinged to the second connecting portion, and the middle part of which is hinged to the upper supporting mechanism; A lower balancing lever has one end hinged to the rod head of the lower balancing hydraulic cylinder, the other end hinged to the second connecting portion, and a middle portion hinged to the lower supporting mechanism.

[0006] In some embodiments, the upper supporting mechanism comprises: an outer bracket, a middle portion of which is hinged to the middle portion of the upper balance lever; An upper bearing seat is arranged on the top of the outer bracket, and the upper bearing seat is used for docking with the upper universal shaft.

[0007] In some embodiments, the lower holding mechanism comprises: an inner bracket, arranged on the inner side of the outer bracket, and having a bottom hinged to the middle part of the lower balance lever; A lower bearing seat is arranged on the top of the inner bracket, and the lower bearing seat is used for docking the lower universal shaft.

[0008] In some embodiments, a crossbeam is disposed on the outer bracket, and the crossbeam is located between the upper and lower bearing seats.

[0009] In some embodiments, the upper and lower bearing seats are both split bearing seats.

[0010] In some embodiments, the upper and lower balancing hydraulic cylinders are both detachably fixedly connected to the first connecting portion.

[0011] In some embodiments, at least the upper balance lever and / or the lower balance lever are welded parts.

[0012] In some embodiments, a limiting mechanism is also provided on the base for providing limiting support to the upper and lower supporting mechanisms during device maintenance.

[0013] In some embodiments, the limiting mechanism includes a limiting hydraulic cylinder disposed on the base, and a cushion block connected to the rod head of the limiting hydraulic cylinder; The cushion block is moved to the position directly below the upper and lower supporting mechanisms for position limiting support only during the maintenance of the device.

[0014] A rolling mill equipment comprises the universal joint shaft balancing device mentioned above.

[0015] Compared with the prior art, the beneficial effects of the present invention include at least: 1. By redesigning the position of the balancing hydraulic cylinder and optimizing the equipment's force structure, the equipment is easier to maintain and repair, thus improving the maintainability of the equipment.

[0016] 2. Changing the local structure from castings to welded parts can greatly reduce the total weight of the device and make it more economical.

[0017] 3. Add a limit mechanism to limit the upper and lower supporting mechanisms during maintenance to facilitate maintenance work without affecting the subsequent normal operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the universal joint balancing device of the present invention from a side view.

[0019] Figure 2 It is a schematic structural diagram of the universal joint balancing device of the present invention from a frontal perspective.

[0020] In the figure: 1. base; 11. first connecting part; 12. second connecting part; 2. upper supporting mechanism; 21. outer bracket; 22. upper bearing seat; 23. crossbeam; 3. supporting mechanism; 31. inner bracket; 32. lower bearing seat; 4. upper balancing hydraulic cylinder; 5. lower balancing hydraulic cylinder; 6. upper balancing lever; 7. lower balancing lever; 8. limiting mechanism; 81. limiting hydraulic cylinder; 82. pad. DETAILED DESCRIPTION

[0021] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0022] The words expressing positions and directions described in the present invention are all explained with reference to the accompanying drawings as examples, but they can be changed as needed, and all such changes are included in the protection scope of the present invention.

[0023] The invention discloses a universal joint shaft balancing device, which supports the weight of a universal joint shaft of a balancing rolling mill through a hydraulic cylinder and adopts a completely new hydraulic cylinder layout to replace the original structural layout.

[0024] See also Figure 1 and Figure 2 As shown, the universal joint shaft balancing device includes a base 1, an upper supporting mechanism 2, a lower supporting mechanism 3, an upper balancing hydraulic cylinder 4, a lower balancing hydraulic cylinder 5, an upper balancing lever 6 and a lower balancing lever 7.

[0025] The base 1 itself is in a straight state, and the first connection part 11 and the second connection part 12 are respectively provided on both sides thereof, and the height of the second connection part 12 is greater than the height of the first connection part 11, so as to cooperate with the installation of the power part of the device. In the present application, the first connection part 11 and the second connection part 12 are both vertical plate structures, and the two can be fixed on the base 1 by welding, riveting, etc. Compared with the one-piece casting structure, under similar specifications, the overall mass of the structure can be greatly reduced.

[0026] The upper and lower supporting mechanisms 3 and 4 are arranged above the base 1 and between the first connecting part 11 and the second connecting part 12. The two are arranged in a vertically parallel posture and are used to connect the upper universal joint shaft and the lower universal joint shaft respectively. Exemplarily, the upper supporting mechanism 2 includes an outer bracket 21 and an upper bearing seat 22, wherein the outer bracket 21 is vertically suspended above the base 1, and the upper bearing seat 22 is arranged on the top of the outer bracket 21 and is used to connect the upper universal joint shaft; the lower supporting structure is similar to it, including an inner bracket 21 and a lower bearing seat 32, wherein the inner bracket 21 is arranged on the inner side of the outer bracket 21, but also suspended above the base 1, and the lower bearing seat 32 is arranged on the top of the inner bracket 21 and is used to connect the lower universal joint shaft.

[0027] The upper and lower balancing hydraulic cylinders 4 and 5 are staggered on the first connection part 11, so as to be away from the upper and lower supporting mechanisms 3 and 4 to reserve sufficient maintenance space. In the present application, the upper and lower balancing hydraulic cylinders 4 and 5 are both detachably fixedly connected to the first connection part 11, for example, each of them can be connected to the first connection part 11 by bolts, kits, etc., so as to be disassembled and assembled for maintenance operations.

[0028] One end of the upper balancing lever 6 is hinged to the rod head of the upper balancing hydraulic cylinder 4, the other end is hinged to the second connecting portion 12, and the middle part is hinged to the upper supporting mechanism 2 (specifically, the middle part of the outer bracket 21). Correspondingly, one end of the lower balancing lever 7 is hinged to the rod head of the lower balancing hydraulic cylinder 5, the other end is hinged to the second connecting portion 12, and the middle part is hinged to the lower supporting mechanism 3 (specifically, the bottom of the inner bracket 21). In the present application, the upper balancing lever 6 and / or the lower balancing lever 7 are welded parts. Compared with the one-piece casting structure, the mass of the balancing lever can be greatly reduced under similar specifications.

[0029] Or Figure 1 and Figure 2 As shown, the universal joint shaft balancing device of the present application adopts hydraulic drive and lever structure to realize the balancing and regulating function. The device is arranged between the reducer and the rolling mill. When working, the upper and lower balancing hydraulic cylinders 4 and 5 can respectively control the upper and lower supporting mechanisms 3 and 4 to rise through the upper and lower balancing levers 6 and 7, thereby providing an upward force to balance the weight of the upper and lower universal joint shafts. Among them, the working pressure of the upper and lower balancing hydraulic cylinders 4 and 5 is adjustable, and is interlocked with the lifting system of the rolling mill roll system to ensure synchronization with the lifting of the roll system and improve the accuracy of the balance.

[0030] In addition, the device changes part of its structure from castings to welded parts. Without affecting the stress, the overall total mass of the device is reduced by approximately 4-6 tons compared to universal joint balancing devices of similar specifications, making it more economical.

[0031] In some embodiments, a crossbeam 23 is provided on the outer bracket 21 to enhance the structural strength of the outer bracket 21 . In the present application, the crossbeam 23 is located between the upper and lower bearing seats 22 , 32 .

[0032] In some embodiments, the upper and lower bearing seats 22 and 32 are split bearing seats, which simplifies the installation and removal process of the bearing, saves manpower and time costs, and provides convenience for device inspection and maintenance. In addition, the split bearing seat mainly bears radial loads, is suitable for spherical roller bearings and spherical ball bearings with cylindrical holes and tapered holes, and can remain stable when subjected to heavy loads and impacts.

[0033] In some embodiments, a limiting mechanism 8 is also provided on the base 1 for providing limiting support to the upper and lower supporting mechanisms 3 and 4 during maintenance of the device, thereby facilitating maintenance work on the upper and lower balancing hydraulic cylinders 4 and 5.

[0034] Specifically, the limiting mechanism 8 includes a limiting hydraulic cylinder 81 disposed on the base 1, and a cushion block 82 connected to the rod head of the limiting hydraulic cylinder 81. The cushion block 82 is moved to the lower part of the upper and lower supporting mechanisms 3 and 4 for limiting support only during the maintenance of the device. Note that in this example, the outer bracket 21 of the upper and lower supporting mechanisms 3 and the inner bracket 21 of the lower supporting mechanism 3 are substantially flush at their bottoms, so as to ensure that the cushion block 82 can simultaneously limit and support the outer bracket 21 and the inner bracket 21.

[0035] The present invention also discloses a rolling mill equipment, including the universal joint shaft balancing device mentioned above, by redesigning the position of the balancing hydraulic cylinder and optimizing the equipment force structure, the equipment is more convenient to maintain and overhaul, and the maintainability of the equipment is improved.

[0036] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, substitute and modify the above embodiments within the scope of the invention without departing from the principles and purpose of the present invention. All such changes should fall within the scope of protection of the claims of the present invention.

Claims

1. A universal joint balancing device, characterized in that: include: A base (1), wherein two sides of the base (1) are respectively provided with a first connecting portion (11) and a second connecting portion (12); Upper and lower holding mechanisms (2, 3) are arranged in parallel above the base (1) and between the first and second connecting parts (12); Upper and lower balancing hydraulic cylinders (4, 5) are staggeredly arranged on the first connecting portion (11); An upper balancing lever (6), one end of which is hinged to the rod head of the upper balancing hydraulic cylinder (4), the other end of which is hinged to the second connecting portion (12), and the middle portion of which is hinged to the upper supporting mechanism (2); A lower balancing lever (7) has one end hinged to the rod head of the lower balancing hydraulic cylinder (5), the other end hinged to the second connecting portion (12), and the middle portion hinged to the lower supporting mechanism (3).

2. The universal joint balancing device according to claim 1, characterized in that: The upper supporting mechanism (2) comprises: An outer bracket (21), a middle portion of which is hinged to a middle portion of the upper balancing lever (6); An upper bearing seat (22) is arranged on the top of the outer bracket (21), and the upper bearing seat (22) is used for docking with the upper universal shaft.

3. The universal joint balancing device according to claim 2, characterized in that: The lower supporting mechanism (3) comprises: An inner bracket (31) is arranged on the inner side of the outer bracket (21), and the bottom of the inner bracket is hinged to the middle of the lower balance lever (7); A lower bearing seat (32) is arranged on the top of the inner bracket (31), and the lower bearing seat (32) is used to dock with the lower universal shaft.

4. The universal joint balancing device according to claim 3, characterized in that: A crossbeam (23) is provided on the outer bracket (21), and the crossbeam (23) is located between the upper and lower bearing seats (32).

5. The universal joint balancing device according to claim 3, characterized in that: The upper and lower bearing seats (22, 32) are both split bearing seats.

6. The universal joint balancing device according to claim 1, characterized in that: The upper and lower balancing hydraulic cylinders (4, 5) are both detachably fixedly connected to the first connecting portion (11).

7. The universal joint balancing device according to claim 1, characterized in that: At least the upper balance lever (6) and / or the lower balance lever (7) are welded parts.

8. The universal joint balancing device according to claim 1, characterized in that: The base (1) is also provided with a limiting mechanism (8) for providing limiting support to the upper and lower supporting mechanisms (2, 3) during device maintenance.

9. The universal joint balancing device according to claim 8, characterized in that: The limiting mechanism (8) comprises a limiting hydraulic cylinder (81) arranged on the base (1), and a cushion block (82) connected to the rod head of the limiting hydraulic cylinder (81); The cushion block (82) is only moved to the position directly below the upper and lower supporting mechanisms (2, 3) for position limiting support during device maintenance.

10. A rolling mill equipment, characterized in that: It comprises a universal joint balancing device as described in any one of claims 1 to 9.

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