WO2021167243A1

WO2021167243A1 - Reducer having oil leakage prevention structure

Info

Publication number: WO2021167243A1
Application number: PCT/KR2021/000159
Authority: WO
Inventors: 김수현
Original assignee: 김수현
Priority date: 2020-02-21
Filing date: 2021-01-07
Publication date: 2021-08-26
Also published as: KR102160533B1

Abstract

The present invention relates to a reducer having an oil leakage prevention structure, wherein the internal and external structure of the reducer is improved so that oil leakage which occurs during operation of the reducer can be efficiently prevented. To this end, the present invention provides a reducer having an oil leakage prevention structure, the reducer comprising: an input reduction unit which is coupled to the inside of the housing in the manner of a cartridge, is connected to a motor through an input shaft, and has a pinion gear formed in a lower portion thereof; an output reduction unit which has a ring gear engaging with the pinion gear and is connected to a rotary machine through an output shaft to transmit the reduced rotation to the rotary machine; and a main oil chamber unit which passes through the output shaft from an upper portion of the output reduction unit and allows oil inside the housing to flow in and out, thereby preventing the oil from leaking.

Description

Reducer with leakage blocking structure

The present invention relates to a speed reducer having an oil leakage blocking structure, and more particularly, to a reduction gear having an oil leakage blocking structure capable of efficiently blocking oil leakage occurring in the operation process of the reducer by improving the internal and external structures of the reducer.

In general, a reducer is a device that is connected to a motor and receives a driving force to obtain a reduced rotational output as desired. Although these reducers are small and light in size, they are favorably used in various industrial fields because they are advantageous for high load transmission and high efficiency can be obtained.

The speed reducer is provided with a number of driving parts for maintaining power transmission and proper rotational force, and proper lubrication is required for smooth driving of the driving parts.

The lubrication method of the reducer can be largely divided into splash lubrication and bath lubrication. In splash lubrication, the oil level is low, and oil is scattered to internal parts such as bearings and gears, and lubrication is performed.

In fields such as water treatment or food plants, which are sensitive to oil leakage, a general-purpose driving part of a so-called dry well structure is mainly used in which the reducer oil and the external rotating shaft do not directly contact to prevent oil leakage accidents of the reducer.

Among dry well products, the externally coupled type of reducer combines a separate reducer with the outside of the main reducer to match the relevant rotation speed, and features a lower integrated casting structure. It consists of a supporting shaft and features a hollow shaft that rotates inside the reducer.

However, such a conventional dry well product has the following problems.

First, the external coupling type of the reducer does not have an oil leakage blocking function in the primary reducer directly connected to the motor, and the amount of oil required for smooth cooling and lubrication is limited due to the limit of the oil bath size of the primary reducer, which has a relatively large operating load. Vulnerable to durability, and oil leakage occurs around the input shaft of the main reducer due to oil seal wear, and when the hollow shaft upper seal of the reducer wears out, oil leakage may occur along the inner hollow shaft wall. There is a limit to durability.

In addition, when the oil seal wears on the upper part of the hollow shaft during oil expansion due to operation, oil leaks through the gap, and there is an external expansion tank to prepare for oil volume expansion. It is possible to transfer oil to the tank, and if the oil expands while the oil seal is worn, it does not go up to the external expansion tank that requires a constant pressure, but leaks through the oil seal gap. As the moisture collected in the lower cap of the gear shaft bearing located in the

Accordingly, the present invention intends to propose a technology capable of blocking oil leakage by improving the internal and external structures and components of conventional dry well products.

Therefore, the present invention has been derived to solve the above problems, and the present invention is to provide a reducer having an oil leakage blocking structure that can efficiently block oil leakage occurring in the operation process of the reducer by improving the internal and external structure of the reducer. There is this.

In addition, the present invention provides an oil leakage blocking structure that enables sufficient lubrication and cooling by driving in a single oil bath, and can eliminate the rotating shaft supporting the gear in the reducer, thereby solving the durability and oil leakage problems caused by the bearing required to support the rotating shaft. Another object is to provide a reducer having

In addition, the present invention provides oil chambers inside and outside the housing to control the flow of oil to the oil chamber even if the oil expands during operation of the reducer, thereby preventing oil leakage to the outside of the housing It is another object to provide a reducer having a structure.

In addition, another object of the present invention is to provide a speed reducer having an oil leakage blocking structure capable of blocking the reverse flow of oil along the shaft in the direction of the motor when the motor rotates by providing a separate backflow blocking blade on the shaft to which the motor is connected. have.

Other objects of the present invention will become clearer through the examples described below.

The reducer having an oil leakage blocking structure according to an aspect of the present invention includes: an input reduction unit that is coupled to the inside of the housing in a cartridge manner, is connected to the motor through an input shaft, and has a pinion gear formed thereunder; an output deceleration unit having a ring gear meshing with the pinion gear formed and connected to a rotator through an output shaft to reduce the high-speed rotation transmitted from the input reduction unit to a low-speed rotation and transmit it to the rotator; and a main oil chamber unit disposed above the output reduction unit to pass through the output shaft, and configured to block oil leakage by allowing oil in the housing to flow in and out.

The reducer having an oil leakage blocking structure according to the present invention may have one or more of the following embodiments.

For example, it may further include a reverse flow blocking blade coupled to the input shaft between the motor and the input reduction unit, and blocking the oil in the housing from flowing backward in the direction of the motor according to the rotation of the input reduction unit. .

The motor may further include a first sub oil chamber unit disposed near the main oil chamber unit at the lower end of the motor to store oil overflowing from the main oil chamber unit.

A flow of oil that is fitted into an overflow control hole passing between the main oil chamber unit and the first sub oil chamber unit at an upper portion of the housing and overflows from the main oil chamber unit to the first sub oil chamber unit It may further include an overflow stopper for controlling the.

A second sub oil chamber unit disposed outside the housing to pass through the output shaft and configured to store oil discharged from the housing to the outside may be further included.

An oil chamber cover that covers the second sub oil chamber unit from the outside of the housing may be further included.

The housing may be formed to protrude from an upper portion to form an oil supply unit for supplying oil to the inside or discharging oil to the outside, and the oil supply unit may be double closed through an inner stopper and an outer stopper.

The output reduction unit may further include an insert disposed between an upper portion of the ring gear and the main oil chamber unit and coupled to the output shaft to reduce an oil amount decrease and an oil volume increase in the housing.

The reducer having an oil leakage blocking structure according to the present invention provides the following effects.

The present invention has the effect of efficiently blocking oil leakage occurring in the operation process of the reducer by improving the internal and external structure of the reducer.

According to the present invention, sufficient lubrication and cooling are possible by driving in a single oil bath, and the rotating shaft supporting the gear in the reducer can be eliminated, thereby solving the problems of durability and oil leakage due to the bearing required to support the rotating shaft.

The present invention has an effect of preventing oil leakage to the outside of the housing by providing oil chambers on the inside and outside of the housing to control the flow of oil to the oil chamber even when the oil expands during operation of the reducer.

The present invention has an effect of preventing the reverse flow of oil in the direction of the motor along the shaft when the motor rotates by providing a separate backflow blocking blade on the shaft to which the motor is connected.

Effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a perspective view showing a speed reducer having an oil leakage blocking structure according to the present invention.

Figure 2 is a perspective cross-sectional view showing a reducer having an oil leakage blocking structure according to the present invention.

Figure 3 is a partial projection perspective view showing a reducer having an oil leakage blocking structure according to the present invention.

4 is a partial projection front view showing a reducer having an oil leakage blocking structure according to the present invention.

Figure 5 is an upper perspective view showing a reducer having an oil leakage blocking structure according to the present invention.

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. In describing the present invention, if it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings, and in the description with reference to the accompanying drawings, the same or corresponding components are given the same reference numbers regardless of the reference numerals, and duplicates thereof A description will be omitted.

Hereinafter, a reducer having an oil leakage blocking structure according to embodiments of the present invention will be described in detail with reference to FIGS. 1 to 5 .

1 is a perspective view showing a reduction gear having an oil leakage blocking structure according to the present invention, FIG. 2 is a perspective cross-sectional view showing a reduction gear having an oil leakage blocking structure according to the present invention, and FIG. 3 is an oil leakage blocking structure according to the present invention It is a partial projection perspective view showing a reducer having .

1 to 5, the reducer 100 having an oil leakage blocking structure according to the present invention may reduce the rotational speed by receiving rotational power from the motor 1 coupled from the top or side. The motor 1 may be protected by a motor housing that surrounds the outside, and in the present invention, the input reduction unit 120 disposed in the housing 110 disposed on the upper portion of the housing 110 to rotate. can transmit Since the motor 1 corresponds to a general device used in the field of a speed reducer, a detailed description thereof will be omitted.

The reducer 100 having an oil leakage blocking structure includes a housing 110 , an input reduction unit 120 , an output reduction unit 130 , a main oil chamber unit 140 , a first sub oil chamber unit 150 , and a second sub It comprises an oil chamber unit 160 , a backflow blocking vane 170 and an insert 180 .

The housing 110 is connected to the motor 1 at the upper part, and therein the input reduction unit 120 , the output reduction unit 130 , the main oil chamber unit 140 , the first sub oil chamber unit 150 , and the reverse flow. The blocking wing 170 and the insert 180 may be provided, and may be externally connected to the second sub oil chamber unit 160 and the oil chamber cover 165 .

The housing 110 may be filled with oil, and may be designed so that oil does not leak to the outside according to the oil leakage blocking structure according to the present invention. The oil enables smooth rotation of the input deceleration unit 120 and the output deceleration unit 130 due to a lubricating action, and thus may transmit the reduced rotational force to a rotating machine (not shown). For example, a rotator may correspond to a device that performs a specific operation through rotation, such as a stirrer.

Referring to FIG. 5 , the housing 110 is formed to protrude from the upper part, and the first oil supply part 112 for supplying oil to the inside or for discharging oil to the outside is formed, and the housing 110 is formed to protrude from the upper part to the first sub oil chamber. The second oil supply part 114 for supplying oil to the inside of the unit 150 or for discharging oil from the first sub oil chamber unit 150 to the outside is formed, and is formed to protrude at the upper part of the main oil chamber unit 140 . ) to the first sub oil chamber unit 150 may be formed with an overflow control unit 116 for controlling the flow of oil to overflow.

In the first oil supply unit 112 , a first oil supply hole 112-1 for supplying and discharging oil is formed through the housing 110 , and primarily through the first inner stopper 112-2. After closing the first oil supply hole 112-1, the first oil supply hole 112-1 may be secondarily closed through the first external stopper 112-3 to prevent double oil leakage.

The second oil supply unit 114 is formed such that a second oil supply hole 114 - 1 for supplying and discharging oil passes through the housing 110 to be connected to the first sub oil chamber unit 150 , and After closing the second oil supply hole 114-1 through the second inner stopper 114-2, the second oil supply hole 114-1 through the second outer stopper 114-3. can be closed to prevent double leakage.

The overflow control unit 116 is formed between the main oil chamber unit 140 and the first sub oil chamber unit 150 at the upper part of the housing 110 , and the main oil chamber unit 140 at the upper part of the housing 110 . An overflow control hole 116 - 1 passing between and the first sub oil chamber unit 150 may be formed. The overflow control unit 116 primarily closes the overflow control hole 116-1 through the overflow stopper 116-2, and then secondarily controls the overflow through the third external stopper 116-3. By closing the hole 116-1, it is possible to double prevent leakage of oil.

Here, the overflow stopper 116 - 2 is configured to control the flow of oil that overflows from the main oil chamber unit 140 to the first sub oil chamber unit 150 , and the overflow control hole 116 - 1 ) to move up and down by an external force to completely close or partially close the overflow control hole 116-1. The overflow stopper 116 - 2 blocks the overflow passage P between the main oil chamber unit 140 and the first sub oil chamber unit 150 when completely closed, so that the first in the main oil chamber unit 140 . Prevents oil from flowing into the sub oil chamber unit 150 , and forms an overflow passage P between the main oil chamber unit 140 and the first sub oil chamber unit 150 when partially closed to form the main oil chamber Oil may flow from the unit 140 to the first sub oil chamber unit 150 .

In one embodiment, the housing 110 may be connected to a separate adapter for coupling to the pre-installed seating base according to the installation location and purpose. The adapter is formed in a shape corresponding to each of the portion coupled to the lower portion of the housing 110 and the portion coupled to the upper portion of the seating base, so that changes in shaft length, installation height, etc. can be minimized.

The input reduction unit 120 may be coupled to the inside of the housing 110 in a cartridge manner, and may be connected to the motor 1 through the input shaft 10 to receive rotational force from the motor 1 . Since the input reduction unit 120 is detachably coupled to the cartridge, it can be detached and easily replaced in case of a failure. For example, the input reduction unit 120 may be slit-fitted downwardly from the upper portion of the housing 110 to be detachable from the housing 110 .

The input reduction unit 120 may be engaged with the ring gear 132 formed in the lower portion of the output reduction unit 130 by the pinion gear 122 having the first number of gears formed in the lower portion. The input reduction unit 120 may receive rotational force directly from the motor 1 to perform high-speed rotation, and may transmit the rotational force to the ring gear 132 through the pinion gear 122 .

Since the input reduction unit 120 is disposed together with the output reduction unit 130 inside the housing 110, it can be driven in a single oil bath, enabling sufficient lubrication and cooling, and supporting the pinion gear 122. It has the characteristic of being able to solve the durability problem and oil leakage problem of the bearing required to support the rotating shaft because it can eliminate the rotating shaft.

In addition, the input reduction unit 120 is formed with a low center of gravity design so that the pinion gear 122 and the bearings can all be submerged in the oil filled in the housing 110 , thereby improving durability and maintainability.

The output reduction unit 130 is disposed inside the housing 110, and a ring gear 132 meshing with the pinion gear 122 of the input reduction unit 120 is formed at the lower portion to receive high-speed rotation, and high-speed rotation can be decelerated to a low-speed rotation to transmit the low-speed rotation to the rotator (not shown) through the output shaft 20 . The ring gear 132 is formed to have a second gear number greater than the first gear number, and rotates at a rotation speed smaller than the rotation speed of the input reduction unit 120 , thereby reducing the high-speed rotation to the low-speed rotation.

The output reduction unit 130 may be connected to the output shaft 20 at the center, and the insert 180 may be provided thereon.

The main oil chamber unit 140 may be disposed inside the housing 110 through the output shaft 20 at the upper portion of the output reduction unit 130 . The main oil chamber unit 140 includes an empty space therein, and when at least one oil inflow hole (not shown) is formed and the oil filled in the housing 110 is expanded, the expanded oil flows into the at least one oil inflow hole. As it flows into the inner space, it is possible to prevent the oil from leaking out of the housing 110 .

The main oil chamber unit 140 communicates with the first sub oil chamber unit 150 from the side so that oil exceeding the internal space may overflow into the first sub oil chamber unit 150 .

The first sub oil chamber unit 150 is provided in case the volume of oil in the housing 110 increases to exceed the capacity of the main oil chamber unit 140 due to management problems. may be disposed in the vicinity of the main oil chamber unit 140 to store oil overflowing from the main oil chamber unit 140 .

The first sub oil chamber unit 150 may prepare for a case in which more oil is supplied to the inside of the housing 110 than a fixed amount or an abnormal increase in the volume of oil, and may be disposed between the main oil chamber unit 140 and the main oil chamber unit 140 . It is formed in a structure in which oil overflows from the main oil chamber unit 140 through the overflow passage P formed in the , so that no separate pressure is required for movement.

On the other hand, since most of the speed reducers have a free space at the lower end of the motor 1 due to their characteristics, by arranging the first sub oil chamber unit 150 in this free space, the structural safety inside the housing 110 can be increased, and the structure is compact. It is possible to reduce the manufacturing cost by making it possible to have a single shape.

The second sub oil chamber unit 160 is disposed outside the housing 110 to pass through the output shaft 20, and stores oil discharged from the housing 110 to the outside to prevent oil leakage to the outside. have.

The second sub oil chamber unit 160 is provided in consideration of an abnormal situation, and prevents leakage to the outside even if oil leakage occurs due to wear of the outer oil seal of the housing 110 , and is covered with the oil chamber cover 165 . Therefore, it is possible to block the phenomenon of oil leakage due to external environmental changes, for example, rain, snow, wind, etc.

In an embodiment, the oil chamber cover 165 may be manufactured as a translucent case so that the operator can see the state of the second sub oil chamber unit 160 .

The reverse flow blocking blade 170 is coupled to the input shaft 10 between the motor 1 and the input reduction unit 120 , and the oil in the housing 110 moves in the direction of the motor 1 according to the rotation of the input reduction unit 120 . can block backflow. The reverse flow blocking blade 170 is formed in the form of a disk having a radius greater than the radius of the input shaft 10 and is coupled to the circumference of the input shaft 10, and covers the motor 1 when the load side oil seal of the motor 1 is worn. It is possible to prevent the reverse flow of oil to the motor housing.

The insert 180 is disposed between the upper portion of the ring gear 132 of the output reduction unit 130 and the main oil chamber unit 140 , and is coupled to the output shaft 20 to reduce the amount of oil inside the housing 110 . and reduce the volume increase of oil.

Most of the speed reducers have a lot of internal space left in the housing 110 in their structure, so that more oil than necessary is filled compared to the operating load, and when the oil amount increases, the oil volume also increases, so a separate insert is inserted in the upper space of the output reduction unit 130 . By inserting 180 , the amount of oil inside the housing 110 may be reduced, and the amount of increase in oil volume may also be reduced.

Although the above has been described with reference to one embodiment of the present invention, those of ordinary skill in the art can variously change the present invention within the scope without departing from the spirit and scope of the present invention described in the claims below. It will be appreciated that modifications and variations are possible.

Claims

an input reduction unit coupled to the inside of the housing in a cartridge manner, connected to the motor through an input shaft, and having a pinion gear formed thereunder;

an output deceleration unit having a ring gear meshing with the pinion gear formed and connected to a rotator through an output shaft to reduce the high-speed rotation transmitted from the input reduction unit to a low-speed rotation and transmit it to the rotator;

It is disposed inside the housing through the output shaft from the upper portion of the output reduction unit, includes an empty space therein, and at least one oil inlet hole is formed so that oil in the housing flows into and out of the oil outlet hole a main oil chamber unit for blocking oil leakage to the outside of the housing; and

and a reverse flow blocking blade coupled to the input shaft between the motor and the input reduction unit and blocking the reverse flow of oil in the housing in the direction of the motor according to the rotation of the input reduction unit.
an input reduction unit coupled to the inside of the housing in a cartridge manner, connected to the motor through an input shaft, and having a pinion gear formed thereunder;

an output deceleration unit having a ring gear meshing with the pinion gear formed and connected to a rotator through an output shaft to reduce the high-speed rotation transmitted from the input reduction unit to a low-speed rotation and transmit it to the rotator;

It is disposed inside the housing through the output shaft from the upper portion of the output reduction unit, includes an empty space therein, and at least one oil inlet hole is formed so that oil in the housing flows into and out of the oil outlet hole a main oil chamber unit for blocking oil leakage to the outside of the housing; and

and a first sub oil chamber unit disposed near the main oil chamber unit at the lower end of the motor to store oil overflowing from the main oil chamber unit.
3. The method of claim 2,

A flow of oil that is fitted into an overflow control hole passing between the main oil chamber unit and the first sub oil chamber unit at an upper portion of the housing and overflows from the main oil chamber unit to the first sub oil chamber unit Reducer having an oil leakage blocking structure further comprising an overflow stopper for controlling.
According to claim 1,

The reducer having an oil leakage blocking structure further comprising a second sub oil chamber unit disposed outside the housing and penetrating the output shaft and configured to store oil discharged from the housing to the outside.
5. The method of claim 4,

The reducer having an oil leakage blocking structure further comprising an oil chamber cover that covers the second sub oil chamber unit from the outside of the housing.
an input reduction unit coupled to the inside of the housing in a cartridge manner, connected to the motor through an input shaft, and having a pinion gear formed thereunder;

an output deceleration unit having a ring gear meshing with the pinion gear formed and connected to a rotator through an output shaft to reduce the high-speed rotation transmitted from the input reduction unit to a low-speed rotation and transmit it to the rotator; and

It is disposed inside the housing through the output shaft from the upper portion of the output reduction unit, includes an empty space therein, and at least one oil inlet hole is formed so that oil in the housing flows into and out of the oil outlet hole and a main oil chamber unit for blocking oil leakage to the outside of the housing,

the housing is

An oil supply part for supplying oil to the inside or discharging oil to the outside is formed by protruding from the upper part,

The oil supply unit has an oil leakage blocking structure, characterized in that it is double closed through an inner stopper and an outer stopper.
an input reduction unit coupled to the inside of the housing in a cartridge manner, connected to the motor through an input shaft, and having a pinion gear formed thereunder;

an output deceleration unit having a ring gear meshing with the pinion gear formed and connected to a rotator through an output shaft to reduce the high-speed rotation transmitted from the input reduction unit to a low-speed rotation and transmit it to the rotator; and

It is disposed inside the housing through the output shaft from the upper portion of the output reduction unit, and includes an empty space therein, and at least one oil inlet hole is formed so that the oil in the housing flows into and out of the oil outlet hole. and a main oil chamber unit for blocking oil leakage to the outside of the housing,

The output reduction unit is

The reducer having an oil leakage blocking structure further comprising an insert disposed between the upper portion of the ring gear and the main oil chamber unit and coupled to the output shaft to reduce an amount of oil in the housing and an increase in oil volume.