CN210318411U

CN210318411U - Vertical stacked combined speed reducer with dual gear differential rotating mechanism

Info

Publication number: CN210318411U
Application number: CN201920607370.XU
Authority: CN
Inventors: 王绍定
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-04-14
Anticipated expiration: 2029-04-29

Abstract

The utility model discloses a vertical stacked combined speed reducer with a dual gear differential rotating mechanism, which comprises a dual gear, wherein the dual gear is mounted on a shaft in an empty sleeve way to form the differential rotating mechanism with the shaft, and the dual gear is formed by rigidly connecting big and small gears with different diameters; the first gear of the input shaft is meshed with the second gear of the duplex gear to form a first-stage speed reduction, and the third gear of the duplex gear is meshed with the fourth gear to form a second-stage speed reduction.

Description

Vertical stacked combined speed reducer with dual gear differential rotating mechanism

Technical Field

The utility model relates to a combined speed reducer technical field especially relates to a vertical closed assembly combined speed reducer with duplicate gear differential slewing mechanism.

Background

The transmission device integrating the distribution gear and the reduction gear is called a combined speed reducer, and the vertical combined speed reducer is characterized in that the central lines of all gear shafts involved in transmission are positioned on the same vertical plane; the central lines of the distribution gear shafts of the horizontal combined speed reducer are positioned on the same vertical plane, and the central lines of the speed reduction gear shafts are positioned on the same horizontal plane.

Because the vertical combined speed reducer has the special advantage of being very suitable for compact arrangement of a rolling mill train, the vertical combined speed reducer is basically adopted in the rolling mill train of the modern continuous rolling production line of the metallurgical system in China since the innovation and the opening.

However, the vertical combined speed reducer has two defects of overhigh input shaft and integral maintenance and hoisting, so a series of technical problems are caused; the method specifically comprises the following steps:

1. the input shaft structure position of the vertical combined speed reducer is very high, so that the installation position of a main motor is higher, the rolling torsional vibration amplitude is increased, the meshing state of gear teeth is poor, the transmission energy consumption is increased, and the service life of equipment is greatly shortened;

because the input shaft structure of the vertical combined speed reducer is positioned at the uppermost side of all gears, the main motor connected with the input shaft and the cooling device thereof can exceed the top end of the combined speed reducer by a plurality of heights, so that the height of a new project plant can be increased, and the manufacturing cost of the plant can be greatly increased;

because the height of the train transmission device caused by the vertically-combined speed reducer is too high, when technical improvement is needed for some old factories, great difficulty is caused because the elevation of the running rail surface is not enough, and some vehicles even can not carry out the technical improvement and can be changed into mobile improvement, so that the improvement cost is greatly increased.

2. The combined reducer for vertical combination needs to be integrally hoisted and assembled, so that the tonnage configured by hoisting equipment is large, and the corresponding structure of a workshop needs to be matched with the tonnage of a crane, so that the investment of the construction cost of the workshop hoisting equipment and the workshop is increased;

because the vertical combined speed reducer needs to adopt an integral assembly method with long assembly period, in order to improve the operation rate of the equipment, integral spare parts are needed to ensure the high operation rate of the equipment, so that the spare part amount of the continuous rolling line equipment is greatly increased; the capital and production cost investments will also correspondingly increase.

Later, the horizontal type stacked combined speed reducer is used for overcoming two defects of the vertical type combined speed reducer and bringing a series of technical problems. However, the horizontal stacked combined speed reducer overcomes two defects of the vertical stacked combined speed reducer, and simultaneously has the problem that the overlarge size in the rolling line direction is not suitable for the compact arrangement of a rolling mill; the method specifically comprises the following steps:

1. the structural characteristics of the horizontal stacking combined speed reducer determine that the box body structure needs to consider the requirements of transmission stability of the distribution transmission gear and the speed reduction transmission gear, so that the box body structure of the horizontal stacking combined speed reducer is huge, the material and processing cost of the box body is higher, and the production cost is increased;

because the horizontal stacked combined speed reducer is longer in structural dimension along the rolling line direction, the row spacing of each continuous rolling mill is 1.5-2 m larger than that of the vertical stacked combined speed reducer on average. The length of the whole continuous rolling line is increased by about 30-40 m on average, and the total weight of workshop equipment and the area of factory buildings and buildings can be increased for new projects, so that the capital investment and the equipment maintenance cost are increased. For the project of technical improvement and reconstruction, the size of the original site is not enough or the factory building cannot be expanded, so that great difficulty is brought, and in some projects, the technical improvement and reconstruction cannot be carried out, so that the reconstruction cost is greatly increased.

To sum up, in order to fully solve two big shortcomings that vertical attach together the combined speed reducer and bring all technical problem, keep its special advantage that is fit for the compact arrangement of rolling mill simultaneously, the utility model discloses a vertical stack dress combined speed reducer provides a vertical stack dress combined speed reducer with duplicate gear differential slewing mechanism for the modern continuous steel rolling production line of metallurgical system in china.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to current joint reducer technique, the utility model provides a vertical closed assembly joint reducer with duplicate gear differential slewing mechanism aims at solving a series of problems that the input shaft position that current vertical closed assembly joint reducer exists is too high and need two big shortcomings of integral hoisting to produce.

In order to achieve the above object, the utility model provides a following technical scheme: a vertical stacked combined speed reducer with a dual gear differential rotating mechanism comprises a dual gear, wherein the dual gear is mounted on a shaft in an empty sleeve manner and forms the differential rotating mechanism with the shaft, and the dual gear is formed by rigidly connecting large and small gears with different diameters; the first gear of the input shaft is meshed with the second gear of the duplex gear to form a first-stage speed reduction, and the third gear of the duplex gear is meshed with the fourth gear to form a second-stage speed reduction.

As a preferred form, the combined speed reducer is provided with an upper shaft assembly and a lower shaft assembly, a duplicate gear is sleeved on the upper shaft in a hollow way to form a differential rotation mechanism together with the upper shaft, and a gear four is fixed on the lower shaft; the second gear of the duplex gear is meshed with the first gear of the input shaft to form a first-stage speed reduction, the third gear of the duplex gear is meshed with the fourth gear to form a second-stage speed reduction, and the upper shaft and the lower shaft are respectively and fixedly provided with a fifth gear and a sixth gear which are meshed with each other to form a distribution gear.

In a preferred form, in order to reduce the height of the input shaft, the gear one fixed on the end of the input shaft is positioned below the gear two which is sleeved on the upper shaft in an empty way.

As a preferred form, in order to realize the layered stack, the combined speed reducer box body is composed of an upper box body, a middle box body and a lower box body which are divided by the horizontal plane of the center of the upper and lower shafts, the lower box body, the middle box body, the upper shaft assembly and the upper box body are sequentially stacked from bottom to top, and the input shaft assembly is formed by inserting and installing the rear side of the middle box body and fixedly connecting the middle box body and the upper box body.

As an installation mode, the second gear and the third gear are rigidly connected to form a duplicate gear, and then are in differential rotation connection with a shaft of the upper shaft through a bearing, and a bearing cover is fixedly installed on the outer side of the bearing.

The utility model has the advantages that: the utility model discloses a vertical stacked combined speed reducer, which aims to effectively overcome all the defects of the vertical stacked combined speed reducer and the horizontal stacked combined speed reducer and solve all the problems brought by the defects; the combined speed reducer equipment which is economical, energy-saving and reliable and can be suitable for compact arrangement of rolling mill trains and can be applied to low-travelling-rail-surface-elevation plants is provided for rolling mill trains of continuous rolling production lines of metallurgical systems in China.

The technical problems that the vertical type stacked combined speed reducer can solve relative to the vertical type stacked combined speed reducer and the horizontal type stacked combined speed reducer are as follows:

1. the high-speed pinion of the vertical stacked combined speed reducer is installed from an opening on the motor side of the middle box body, and the structural position of an input shaft is reduced by two times of the center distance of the high-speed pinion compared with that of the vertical stacked combined speed reducer, so that a series of problems that the rolling torsional vibration amplitude of the vertical stacked combined speed reducer is large, the transmission efficiency is low, the height of a newly-built project is too high, the implementation of a technical progress transformation project is difficult and the like are solved satisfactorily;

the service life of the high-speed pinion is usually only below 1/3 of the bull gear of the same stage, so the high-speed pinion is the most preferred part of spare parts, and the rest gears are usually only required to be provided with one set of each of the primary, intermediate and finishing mill groups; the problems of large spare part quantity, long overhaul time, relatively low operation rate of equipment, relatively high production cost and the like caused by adopting the vertical type combined speed reducer are solved.

2. The box body assembly of the vertical stacked combined speed reducer adopts a layered stacked technology, so that the vertical stacked combined speed reducer can be disassembled layer by layer from top to bottom and assembled layer by layer from bottom to top during maintenance and assembly. Therefore, the tonnage configured by the workshop hoisting equipment is calculated by taking the integral hoisting of the combined speed reducer as the single hoisting weight and is transferred to the calculation by taking the rolling mill roller system as the single hoisting weight, and the technical problems that the investment of the hoisting equipment and the workshop is increased and spare parts are needed for a box body due to the overlarge crane configuration caused by the integral hoisting and assembling of the vertical combined speed reducer in the steel rolling workshop are solved.

3. The horizontal type stacked combined speed reducer is also created for solving a series of problems caused by the defects that the vertical type combined speed reducer needs to be integrally hoisted and the position of an input shaft is too high, but the main advantages that the vertical type combined speed reducer can be suitable for the compact arrangement of a rolling mill train cannot be reserved while the problems of the vertical type combined speed reducer are solved, the main advantage of the vertical type combined speed reducer is reserved by the vertical type stacked combined speed reducer, and the problems that the horizontal type stacked combined speed reducer is large in box body and not suitable for the compact arrangement of the rolling mill train cannot be solved.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic front view of fig. 1.

Detailed Description

In the embodiment 1, taking a combined speed reducer having an upper shaft assembly and a lower shaft assembly as an example,

as shown in fig. 1 and 2;

a vertical stacked combined speed reducer with a dual gear differential rotation mechanism comprises a dual gear 13 which is arranged in an empty sleeve mode, wherein the dual gear 13 is arranged on an upper shaft in an empty sleeve mode, the dual gear 13 is formed by rigidly connecting a second gear 2 and a third gear 3 which have different diameters, and a fourth gear 4 is fixed on a lower shaft; the second gear 2 is meshed with the first gear 1 of the input shaft to form a first-stage speed reduction, the third gear 3 is meshed with the fourth gear 4 to form a second-stage speed reduction, and the first gear 1 fixed on the end of the input shaft is positioned below the second gear 2 which is sleeved on the upper shaft in an empty mode.

The transmission mode is as follows: the first gear 1 is meshed with the second gear 2 (primary speed reduction), the second gear 2 is rigidly connected with the third gear 3 to rotate synchronously, and the third gear 3 is meshed with the fourth gear 4 (secondary speed reduction) to realize the speed reduction rotation of the lower shaft.

In addition, the upper shaft and the lower shaft are respectively and fixedly provided with a five gear and a six gear which are meshed with each other and have the same reference circle diameter to form a distribution gear; the gear four 4 drives the gear five 5 to synchronously rotate through the lower shaft, the gear five 5 is meshed with the gear six 6 to form a gear distribution stage, the output of the same-speed rotation of the shafts of the upper shaft and the lower shaft is realized, and the transmission requirement of a two-roll mill can be met.

The utility model discloses a vertical closed assembly combined speed reducer at first innovates and constitutes rigidity duplex gear group free sleeve in epaxial differential rotation technical scheme with two 2 and three 3 of gears on vertical combined speed reducer, and differential rotation technical scheme is this vertical closed assembly combined speed reducer input shaft (both power input motor) puts down prerequisite and the basis that installation technical scheme and box layering closed assembly technical scheme can realize, also is vertical closed assembly combined speed reducer core mechanism technical innovation.

Under the condition that the same reduction ratio needs to be achieved, a first-stage speed reduction mode is formed by meshing a second gear 2 of the duplicate gear 13 with a first gear 1 of the input shaft, and a second-stage speed reduction mode is realized by meshing a third gear 3 with a fourth gear 4.

In addition, because the first gear 1 of the input shaft of the vertical type stacked combined speed reducer is arranged below the second gear 2, compared with the vertical type combined speed reducer, the height of a factory building can be greatly reduced, the torsional vibration amplitude is reduced, the transmission efficiency can be improved, and the service life of the first gear 1 of the input shaft is prolonged.

Namely, the energy can be saved, the investment of the height and the cost of a factory building can be saved, the maintenance time is reduced, and the equipment operation rate is improved. The spare parts amount is reduced, and the maintenance cost is saved; compared with a horizontal stacking combined speed reducer, the vertical stacking combined speed reducer has the advantages that the rolling line direction can be shortened, and the floor area of a factory building can be reduced. The manufacturing cost of the factory building can be reduced, and the land acquisition area of the factory building can be reduced.

On the other hand, the combined speed reducer box body is composed of an upper box body 7, a middle box body 8 and a lower box body 9 which are split by taking the horizontal plane of the center of the upper shaft and the lower shaft as a splitting plane, the lower box body 9, a lower shaft assembly 12, the middle box body 8, an upper shaft assembly 10 and the upper box body 7 are sequentially stacked from bottom to top, and an input shaft assembly 11 is formed by inserting and installing the rear side of the middle box body 8 and fixedly connecting the two.

Because the box assembly of the vertical stacked combined speed reducer adopts the layered stacked technology, and adopts the technical scheme that the central horizontal plane of the upper and lower two shafts is a split plane, and the horizontal stacked technology of the middle and lower three boxes solves the technical problem that the investment of hoisting equipment and a workshop is increased due to overlarge crane configuration caused by the integral hoisting assembly required by the vertical stacked combined speed reducer. Taking an annual 80-kiloton bar factory as an example, 32/5t of hoisting equipment is required to be matched by adopting a vertical type combined speed reducer, and only 16/5t of hoisting equipment is required to be matched by adopting a vertical type stacked combined speed reducer; this not only saves hoisting equipment and supporting investment, but also the factory building cost will be reduced 1/4, and the total one tandem mill can save 900 ten thousand of investment. In addition, the combined speed reducer can be hoisted in a layered mode, spare parts of a box body can be omitted, each combined speed reducer box body weighs about 10 tons, 200-240 tons of spare parts of the box body can be omitted in a continuous rolling mill, and accordingly investment of 400-480 ten thousand yuan of spare parts is omitted.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the present invention.

Claims

1. A vertical stacked combined speed reducer with a dual gear differential rotation mechanism is characterized by comprising a dual gear, wherein the dual gear is mounted on a shaft in an empty sleeve manner and forms the differential rotation mechanism with the shaft, and the dual gear is formed by rigidly connecting large and small gears with different diameters; the first gear of the input shaft is meshed with the second gear of the duplex gear to form a first-stage speed reduction, and the third gear of the duplex gear is meshed with the fourth gear to form a second-stage speed reduction.

2. The vertical stacked combined speed reducer with the dual gear differential rotation mechanism as claimed in claim 1, wherein the combined speed reducer has an upper shaft assembly and a lower shaft assembly, the dual gear is sleeved on the upper shaft in an empty way to form the differential rotation mechanism with the upper shaft, and the gear four is fixed on the lower shaft; the second gear of the duplex gear is meshed with the first gear of the input shaft to form a first-stage speed reduction, the third gear of the duplex gear is meshed with the fourth gear to form a second-stage speed reduction, and the upper shaft and the lower shaft are respectively and fixedly provided with a fifth gear and a sixth gear which are meshed with each other to form a distribution gear.

3. The vertical stacked combined speed reducer with a dual gear differential rotation mechanism as claimed in claim 2, wherein the gear fixed on the input shaft end is located below the gear II which is hollow on the upper shaft.

4. The vertical stacked combined speed reducer with the dual gear differential rotation mechanism as claimed in claim 2, wherein the combined speed reducer casing is composed of an upper casing, a middle casing and a lower casing which are split planes from the central horizontal plane of the upper and lower shafts, the lower casing, the lower shaft assembly, the middle casing, the upper shaft assembly and the upper casing are sequentially stacked from bottom to top, and the input shaft assembly is formed by inserting and mounting the rear side of the middle casing and fixedly connecting the two casings.