CN214767822U - Balancing device for transmission shaft bracket of rolling mill - Google Patents

Abstract

The utility model discloses a balancing device of a transmission shaft bracket of a rolling mill, which relates to the technical field of rolling equipment and comprises an upper balancing unit and a lower balancing unit which are mutually independent, wherein the upper balancing unit comprises an upper fixing plate and at least two groups of upper balancing components, the upper fixing plate is arranged at the top end of the transmission shaft bracket, and the upper balancing components comprise a double-head screw rod, an upper elastic supporting piece and an upper adjusting nut; the lower balancing unit comprises at least two groups of lower balancing components and connecting blocks which are respectively arranged on two sides of the transmission shaft bracket, each lower balancing component comprises a single-head screw rod, a lower elastic supporting piece, a lower adjusting nut and a lower fixing plate, the connecting blocks are fixed on the side faces of the lower bearing seats, the lower fixing plates are horizontally fixed on the outer wall of the transmission shaft bracket, the single-head screw rods penetrate through the connecting blocks and the lower fixing plates and are in threaded connection with the lower adjusting nuts, and the lower elastic supporting pieces are supported between the lower adjusting nuts and the lower fixing plates. The utility model provides a balancing unit of current rolling mill transmission shaft bracket have the problem of easy inefficacy, maintenance difficulty.

Description

Balancing device for transmission shaft bracket of rolling mill

Technical Field

The utility model belongs to the technical field of rolling equipment technique and specifically relates to a balancing unit of rolling mill transmission shaft bracket.

Background

The rolling mill of the rolling material system in the metallurgical industry mainly transmits torque through the universal transmission shaft, the universal transmission shaft needs to be effectively supported and positioned by a supporting design bracket due to the problems of length, weight and the like, the good bracket can ensure that the universal transmission shaft swings little when rotating, and the universal transmission shaft has small vertical displacement when the rolling mill is replaced and separated. Most universal transmission shaft brackets in the industry adopt a pull rod dead weight type balance mechanism and a chain dead weight type balance mechanism.

Due to the fact that the steel rolling production line is poor in environment and large in operation load of the bracket, the rigid connecting structure of the pull rod and the pin shaft of the pull rod dead weight balancing mechanism is easy to break due to vibration of the transmission shaft in the rolling process, and failure cannot be adjusted; the chain of the self-weight balance mechanism of the chain is inflexible to move in a severe environment and is easy to corrode, block and break, so that the self-weight balance mechanism of the bracket fails. In addition, the two mechanisms utilize a lever balance principle to connect the upper universal shaft and the lower universal shaft in the bracket together through a chain or a pull rod, and when one chain or pull rod fails, the whole bracket balance device is forced to fail. The two mechanisms are not durable in exposure and difficult to maintain in actual production.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a balancing unit of rolling mill transmission shaft bracket, this kind of device can solve the balancing unit of current rolling mill transmission shaft bracket and have easy inefficacy, maintain the problem of difficulty.

In order to solve the above problem, the utility model discloses a technical scheme is: the balancing device of the rolling mill transmission shaft bracket comprises an upper balancing unit and a lower balancing unit which are independent from each other, wherein the upper balancing unit comprises an upper fixing plate and at least two groups of upper balancing assemblies, the upper fixing plate is installed at the top end of the transmission shaft bracket, each upper balancing assembly comprises a double-head screw rod, an upper elastic supporting piece and an upper adjusting nut, one end of the double-head screw rod vertically penetrates through the upper fixing plate to be in threaded connection with an upper bearing seat, the other end of the double-head screw rod is in threaded connection with the upper adjusting nut for adjusting the compression amount of the upper elastic supporting piece, and the upper elastic supporting piece is supported between the upper adjusting nut and the upper fixing plate; the lower balancing unit comprises at least two groups of lower balancing components which are respectively arranged at two sides of the transmission shaft bracket and a connecting block which is positioned at the outer side of the transmission shaft bracket, the connecting block is arranged on the side surface of the lower bearing seat, the connecting block and the lower bearing seat are integrally formed, the lower balancing component comprises a single-head screw rod, a lower elastic supporting piece, a lower adjusting nut and a lower fixing plate, the lower fixing plate is horizontally fixed on the outer wall of the transmission shaft bracket and is positioned above the connecting block, the single-head screw rod vertically penetrates through the connecting block and the lower fixing plate upwards, the end of the single-head screw rod is abutted to the connecting block, the other end of the single-head screw rod is in threaded connection with the lower adjusting nut used for adjusting the compression amount of the lower elastic supporting piece, and the lower elastic supporting piece is supported between the lower adjusting nut and the lower fixing plate.

In the technical solution of the balancing device for the rolling mill transmission shaft bracket, a more specific technical solution may be that: the upper elastic supporting piece and the lower elastic supporting piece are compression springs.

Furthermore, the double-end lead screw and the upper elastic support piece are coaxially arranged, and the single-end lead screw and the lower elastic support piece are coaxially arranged.

Furthermore, an upper pressure plate is arranged between the upper elastic supporting piece and the lower adjusting nut, and two ends of the upper elastic supporting piece are respectively abutted against the upper pressure plate and the upper fixing plate; and a lower pressing plate is arranged between the lower elastic supporting piece and the lower adjusting nut, and two ends of the lower elastic supporting piece are respectively abutted against the lower pressing plate and the lower fixing plate.

Furthermore, the upper end of double-end lead screw is equipped with polygon location portion.

Furthermore, the double-end screw rod and the thread of the single-end screw rod are additionally provided with dustproof sleeves.

Since the technical scheme is used, compared with the prior art, the utility model following beneficial effect has:

1. the balance mechanism composed of the screw rod, the elastic supporting piece, the adjusting nut and other components has the advantages of simple and durable structure, no fracture and failure, simple disassembly and assembly, less faults, easy maintenance and prolonged service life, and is particularly suitable for severe working environments in the metallurgical industry; the efficiency of changing the process into rolling and changing the roll is improved, the adjustment of the bearing seat by the bracket ensures that the vertical displacement of the universal transmission shaft is small, the original position can be ensured, other auxiliary tools are not needed for supporting and changing the roll, and the machine hour yield is obviously improved; the service life of the universal transmission shaft and the rolling mill is prolonged, and the self weight of the universal transmission shaft is large, so that the balance device can effectively balance the self weight of the transmission shaft for a long time, reduce the swing of the universal transmission shaft during rotation and reduce the additional impact force on the rolling mill; the connecting block and the lower bearing seat are integrally formed, so that the connecting strength can be improved, and unbalance caused by deformation and fracture of a main bearing part is avoided; the orientation of the upper fixing plate and the single-head screw rod is convenient to install, inspect and maintain.

2. The upper elastic support part and the lower elastic support part are both provided with compression springs, the buffering and shock absorbing performance is good, and the larger expansion space of the compression springs also meets the requirement of adjusting the roll gap of the rolling mill; under a severe metallurgical environment, the deformation of the spring is small, after the stress of the balance springs on two sides is adjusted once, the universal shaft is replaced for many times without repeated adjustment, and the maintenance workload is small; the spring has no fracture risk, and the cardan shaft has no drop fault.

3. The lead screw and compression spring set up with the same shaft to set up the structure of contradicting of clamp plate and spring between adjusting nut and spring, make the installation and the regulation operation of balanced subassembly more convenient, the atress is balanced, and the reliability is high.

4. The design of the multi-deformation positioning part of the double-end screw rod is connected with the upper bearing seat in a screwing mode, so that the double-end screw rod is convenient to operate, connect and fasten, and is convenient to disassemble and assemble.

5. The screw teeth of the screw rod are additionally provided with the dustproof sleeve, so that the flexible adjustment of the nut can be ensured.

Drawings

Fig. 1 is a schematic structural view of the balancing device of the rolling mill transmission shaft bracket.

Fig. 2 is a left side view of fig. 1.

Fig. 3 is a schematic structural view of the double-headed screw rod.

The reference numbers illustrate: 1. an upper balance assembly; 1-1, adjusting the nut; 1-2, an upper pressure plate; 1-3, an upper elastic support member; 1-4, a double-end screw rod; 1-41, polygonal positioning portion; 2. an upper fixing plate; 3. a drive shaft bracket; 3-1, a guide groove; 4. an upper bearing seat; 5. a lower bearing seat; 5-1, connecting blocks; 6. a lower balance assembly; 6-1, a single-head screw rod; 6-2, a lower fixing plate; 6-3, a lower elastic support member; 6-4, pressing the plate; 6-5, lower adjusting nut; 7. an upper transmission shaft; 8. and a lower transmission shaft.

Detailed Description

The invention will be described in more detail with reference to the following embodiments:

the balancing device of the rolling mill transmission shaft bracket shown in fig. 1 and 2 is composed of an upper balancing unit and a lower balancing unit which are independent from each other and respectively adjust the height position and the elastic balance state of an upper bearing seat 4 and a lower bearing seat 5 on the transmission shaft bracket 3, so that the self gravity of the rolling mill transmission shaft and the vibration generated in the rolling process can be better balanced. An upper bearing seat 4 used for supporting a transmission shaft 7 on a rolling mill and a lower bearing seat 5 used for supporting a lower transmission shaft 8 can only slide up and down in a transmission shaft bracket 3, two side walls of the transmission shaft bracket 3 are provided with guide grooves 3-1 matched with guide structures on two sides of the upper bearing seat 4 and the lower bearing seat 5, the upper bearing seat 4 is connected with an upper balance unit to form a suspension state, and the lower bearing seat 5 is connected with a lower balance unit to form a suspension state. The upper balance unit comprises an upper fixing plate 2 horizontally arranged at the top of the transmission shaft bracket 3 and two groups of upper balance assemblies 1 symmetrically arranged, each upper balance assembly 1 comprises a double-end screw rod 1-4, an upper elastic support 1-3, an upper pressing plate 1-2 and an upper adjusting nut 1-1, and each upper elastic support 1-3 is a compression spring; as shown in fig. 3, one end of the double-ended screw rod 1-4 is a square head structure which is convenient for being disassembled and assembled by using a tool such as a wrench, and in other embodiments, the positioning part 1-41 can be a polygonal positioning part such as a hexagon; the upper fixing plate 2 is provided with a through hole with the aperture larger than the outer diameter of the double-head screw rod 1-4, the polygonal positioning part 1-41 of the double-head screw rod 1-4 is positioned at the upper end, and the other end of the double-head screw rod vertically penetrates through the corresponding through hole of the upper fixing plate 2 and then is fixedly connected with the upper bearing seat 4 in a threaded manner; an upper elastic supporting piece 1-3 which is coaxial with the double-end screw rod 1-4 is arranged on the upper fixing plate 2, an upper pressing plate 1-2 is sleeved on the double-end screw rod 1-4, two ends of the upper elastic supporting piece 1-3 are respectively abutted against the upper pressing plate 1-2 and the upper fixing plate 2, and the double-end screw rod 1-4 is connected with an upper adjusting nut 1-1 through threads so as to adjust the compression amount of the upper elastic supporting piece 1-3. The lower balancing unit comprises two groups of lower balancing components 6 and connecting blocks 5-1 which are symmetrically arranged at two sides of a transmission shaft bracket 3, the lower balancing components 6 comprise single-head screw rods 6-1, lower elastic supporting pieces 6-3, lower pressing plates 6-4, lower adjusting nuts 6-5 and lower fixing plates 6-2, the lower elastic supporting pieces 6-3 also adopt compression springs, the connecting blocks 5-1 are positioned at the side surfaces of the lower bearing blocks 5 and are integrally formed with the main bodies of the lower bearing blocks 5, the connecting blocks 5-1 penetrate through guide grooves 3-1 of the transmission shaft bracket 3 to extend out of the transmission shaft bracket 3, the lower fixing plates 6-2 which are horizontally arranged are welded at the outer side of the transmission shaft bracket 3, the lower fixing plates 6-2 are positioned above the connecting blocks 5-1, the end head of the single-head screw rods 6-1 faces downwards, the thread section at the other end penetrates through the connecting blocks 5-1, The lower fixing plate 6-2 and the lower elastic supporting piece 6-3 are arranged on the lower fixing plate 6-2, the lower elastic supporting piece 6-3 and the single-head screw rod 6-1 are coaxially arranged, the lower pressing plate 6-4 is sleeved on the single-head screw rod 6-1, two ends of the lower elastic supporting piece 6-3 are respectively abutted against the lower pressing plate 6-4 and the lower fixing plate 6-2, the single-head screw rod 6-1 is connected through a lower adjusting nut 6-5 in a threaded mode, and the compression amount of the lower elastic supporting piece 6-3 is adjusted. In order to improve the adjustment flexibility of each adjusting nut, the screw teeth of the double-head screw rod 1-4 and the single-head screw rod 6-1 are respectively provided with a dustproof sleeve (not shown in the figure). The precision of the compression spring is 3 grades, and in addition, the precision of the adopted screw rod is higher than that of a common bolt, so that the accurate adjustment is facilitated.

The balancing device of the transmission shaft bracket of the rolling mill is mainly used for bar rolling, and according to the load of a standard part of a transmission shaft of a horizontal rolling mill and the calculation of a universal shaft loaded by the maximum load of a rack, the wire diameter of a spring is selected and the specification of a screw rod is adjusted. When the upper bearing seat 4 is adjusted to be balanced, the upper adjusting nut 1-1 on the double-head screw rod 1-4 is rotated, the upper elastic supporting piece 1-3 is supported by the upper fixing plate 2, and the upper adjusting nut 1-1 and the upper pressing plate 1-2 are used for compressing and adjusting to realize the balance and stability of the upper bearing seat 4. When the balance of the lower bearing seat 5 needs to be adjusted, the lower adjusting nut 6-5 on the single-head screw rod 6-1 is rotated, the lower elastic supporting piece 6-3 is supported by the lower fixing plate 6-2, and the balance and stability of the lower bearing seat 5 are realized by compressing and adjusting the lower adjusting nut 6-5 and the lower pressing plate 6-4. When any balance component is adjusted, the balance component is not limited by the balance mechanism on the other side, and the operation is convenient.

Claims (6)

1. A balancing device of a rolling mill transmission shaft bracket is characterized in that: the upper balance unit comprises an upper fixing plate and at least two groups of upper balance assemblies, the upper fixing plate is mounted at the top end of a transmission shaft bracket, each upper balance assembly comprises a double-head screw rod, an upper elastic supporting piece and an upper adjusting nut, one end of the double-head screw rod vertically penetrates through the upper fixing plate to be in threaded connection with an upper bearing seat, the other end of the double-head screw rod is in threaded connection with the upper adjusting nut for adjusting the compression amount of the upper elastic supporting piece, and the upper elastic supporting piece is supported between the upper adjusting nut and the upper fixing plate; the lower balancing unit comprises at least two groups of lower balancing components which are respectively arranged at two sides of the transmission shaft bracket and a connecting block which is positioned at the outer side of the transmission shaft bracket, the connecting block is arranged on the side surface of the lower bearing seat, the connecting block and the lower bearing seat are integrally formed, the lower balancing component comprises a single-head screw rod, a lower elastic supporting piece, a lower adjusting nut and a lower fixing plate, the lower fixing plate is horizontally fixed on the outer wall of the transmission shaft bracket and is positioned above the connecting block, the single-head screw rod vertically penetrates through the connecting block and the lower fixing plate upwards, the end of the single-head screw rod is abutted to the connecting block, the other end of the single-head screw rod is in threaded connection with the lower adjusting nut used for adjusting the compression amount of the lower elastic supporting piece, and the lower elastic supporting piece is supported between the lower adjusting nut and the lower fixing plate.

2. The rolling mill drive shaft bracket balancing device of claim 1, wherein: the upper elastic supporting piece and the lower elastic supporting piece are compression springs.

3. The rolling mill drive shaft bracket balancing device of claim 2, wherein: the double-end lead screw with go up the coaxial setting of elastic support piece, the single-end lead screw with the coaxial setting of elastic support piece down.

4. The rolling mill drive shaft bracket balancing device of claim 3, wherein: an upper pressure plate is arranged between the upper elastic supporting piece and the lower adjusting nut, and two ends of the upper elastic supporting piece are respectively abutted against the upper pressure plate and the upper fixing plate; and a lower pressing plate is arranged between the lower elastic supporting piece and the lower adjusting nut, and two ends of the lower elastic supporting piece are respectively abutted against the lower pressing plate and the lower fixing plate.

5. The balancing device of a rolling mill drive shaft bracket according to any one of claims 1 to 4, characterized in that: the upper end of the double-end screw rod is provided with a polygonal positioning part.

6. The rolling mill drive shaft bracket balancing device of claim 5, wherein: and the double-end screw rod and the thread of the single-end screw rod are additionally provided with dustproof sleeves.

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