KR101005062B1 - Oil level gauge for swivel reduction of excavator - Google Patents

Abstract

An oil level checking device for easily checking the lubricating oil level inside the swing reducer is disclosed. The oil level checking device comprises a transparent gauge tube disposed in a horizontal position with the swing reducer at a point adjacent to the swing reducer. The lower end of the gauge tube is connected by means of a connecting means and an outlet formed in the housing side of the swing reducer. The user can easily and quickly check the amount of lubricating oil inside the swing reducer through the transparent gauge tube exposed to the outside without the user using the gauge stick.

Excavator, slewing reducer, oil level, oil gauge

Description

Oil level check device for turning reducer of excavator {OIL LEVEL GAUGE FOR SWIVEL REDUCTION OF EXCAVATOR}

The present invention relates to a swing reducer of a construction machine, and more specifically, to an oil level checking device for easily checking the lubricating oil level inside the swing reducer.

Construction equipment, such as excavators and cranes, is equipped with a drive system for driving a vehicle. The drive system includes a hydraulic pump for generating hydraulic pressure using a diesel engine or a gasoline engine as a driving source, a hydraulic control valve for controlling the flow direction and flow rate of the hydraulic pressure, and a hydraulic actuator for generating driving force.

The drive system also includes a swing device for swinging the upper swing body of the vehicle. The swing device includes a swing motor for generating rotational force by the hydraulic pressure of the hydraulic pump and a swing reducer for decelerating the rotational force of the swinging motor in a state suitable for running. The swing motor and swing reducer are typically formed integrally.

Swivel reducer, as shown in Figure 1, is generally installed between a pair of support brackets provided on the upper frame. The support bracket is pivotally mounted to the boom of the excavator, and the swing reducer is installed in the space between the support brackets in order to protect it from impact from the outside.

Referring to FIG. 2 schematically showing a cross section of the swing reducer 10, the swing reducer 10 includes a housing 12, a ring gear 14 provided on an inner circumferential wall of the housing 12, and a rotation shaft 16 connected to the swing motor. ).

The swing reducer 10 also includes an oil gauge 20 for measuring the amount of lubricant stored inside the housing 12. The oil gauge 20 is inserted into the tube 22 to be in contact with a tube 22 made of stainless steel installed inside the housing through a hole formed in the housing 12 and a lubricant stored in the housing 12. It consists of a gauge stick 24 made of stainless steel. The upper end of the gauge stick 24 is formed with a circular handle 26 to easily pull out the gauge stick 24. The lower part of the handle 26 is provided with a cap 28 made of rubber for sealing the open upper portion of the tube 22.

When the revolving speed reducer decreases or damages the sealing efficiency of various seals inside the housing 12, and oil leaked in the housing leaks, a problem occurs that the gears installed inside the housing are prematurely worn or damaged. To prevent this, the user must pull the gauge stick out of the housing of the swing reducer and check the amount of lubricant directly. However, in the case of a large excavator, it is inconvenient for the user to access the oil gauge.

That is, since the swing reducer is provided in a narrow space of the upper frame, it is very difficult to measure the amount of lubricating oil inside the swing reducer.

In addition, since the user periodically checks the amount of lubricant stored in the swing reducer at regular intervals, it is impossible to timely and accurately check the leakage of the lubricant stored in the swing reducer.

Accordingly, an object of the present invention is to solve the above-described problems, and to provide an oil level checking device of a swing reducer for easily and quickly checking the amount of lubricating oil inside the swing reducer at a position where access is convenient.

Another object of the present invention is to provide an oil level checking device for easily and accurately determining the time point at which the lubricant stored inside the swing reducer leaks.

In order to achieve the above and other objects of the present invention, according to one aspect of the present invention, in the oil level check device for measuring the amount of lubricant stored inside the swing reducer of the excavator, the swing reducer at a point adjacent to the swing reducer And a transparent gauge tube disposed in a horizontal position, the lower end of the gauge tube being provided with an oil level checking device connected by an outlet and a connecting means formed on the housing side of the swing reducer.

The gauge tube is a hollow cylinder, having a closed upper end and an open lower end, through which lubricating oil moves. The coupling provided at the open end of the gauge tube and the outlet of the housing is in fluid communication with a rubber hose or steel hose. The gauge tube is marked with an upper limit line and a lower limit line, and is preferably installed on the side wall of the hydraulic tank provided at an adjacent point of the swing reducer.

According to the configuration of the present invention, the user can easily and quickly check the amount of lubricating oil inside the swing reducer through the transparent gauge tube exposed to the outside without using the gauge stick installed in the housing of the swing reducer.

In addition, since the user can check the amount of lubricating oil stored in the turning reducer from the outside at any time, it is possible to check the oil leakage timing of the lubricating oil very accurately.

Hereinafter, the oil level checking device of the swing reducer according to the preferred embodiment of the present invention will be described in detail with reference to FIGS. 3 to 5.

3 is a schematic view showing a swing reducer to which an oil level checking device according to a preferred embodiment of the present invention is applied.

Referring to FIG. 3, the swing reducer 100 includes a housing 112, a ring gear 114 installed on an inner circumferential wall of the housing 112, a rotation shaft 116 connected to a swing motor, and an inside of the housing 112. An oil level checking device 120 for measuring the amount of stored lubricant is provided.

Since the rest of the configuration of the swing reducer except for the oil level checking device 120 is substantially the same as that described in the prior art column, a detailed description thereof will be omitted.

An outlet 118 is formed at a portion of the side surface of the housing 120, and the coupling 119 is firmly coupled to the outlet 118 by welding, such that a predetermined portion of the coupling 119 protrudes to the outside. One end of the rubber hose 122 is fitted to the protrusion of the coupling 119 and is fixed by a fastener or the like. The other end of the rubber hose 122 is fixed to the lower end of the oil level checking device 120 described below.

4 is a cross-sectional view showing an oil level checking apparatus 120 according to a preferred embodiment of the present invention.

Referring to FIG. 4, the oil level checking device 120 is attached to the side wall of the hydraulic tank 130 installed in the upper frame. The oil level checking device 120 is firmly fixed to the hydraulic tank by means not shown, thereby fixing the position of the oil level checking device 120.

The oil level checking device 120 has a gauge tube 124 made of a material such as transparent plastic. The upper end of the gauge tube 124 is closed and the lower end is open. The open end of the gauge tube 124 is inserted into the rubber hose 122 in fluid communication and securely fastened by the clamp 123. The clamp 123 is preferably fixed to the side wall of the hydraulic tank 130.

An exhaust hole 129 is formed near the upper end so that the lubricating oil 126 stored in the gauge tube 124 can move freely therein. In addition, the lower limit display line 127 and the upper limit display line 128 are marked on the gauge tube 124 so that the user can easily check the amount of lubricating oil visually.

As shown in FIG. 5, the gauge tube 124 preferably has a lower limit display line 127 and an upper limit display line 128 attached to the side wall of the hydraulic tank 130 at a position corresponding to a predetermined portion of the swing reducer 100. Do. The reason why the gauge tube 124 is installed at a position corresponding to a predetermined portion of the swing reducer 100 is to use the principle that the same atmospheric pressure of the fluid acting on the gauge tube 124 and the swing reducer 100 is the same. to be. That is, when the upper end of the gauge tube is located at the same level as the upper end of the housing of the swing reducer, both levels are kept the same because the atmospheric pressure acting on the level of the lubricant of the gauge tube and the level of the lubricant stored inside the housing is the same. .

Conventional swing reducers are equipped with an oil level check device in the housing of the reducer, and to check the amount of lubricant, the gauge stick must be pulled out and visually checked. However, since the oil level checking device according to the present invention is provided at a horizontal position with the swing reducer and is composed of a transparent gauge tube, the amount of lubricating oil can be easily checked without using a gauge stick.

Therefore, in the case of the swing reducer provided with the oil level checking apparatus according to the present invention, the user can check the amount of lubricating oil at any time, so that the oil leakage of the lubricating oil can be accurately identified.

A method of installing the oil level checking apparatus according to the present invention to the swing reducer will be briefly described.

One end of the rubber hose 122 is connected to the coupling 119 provided in the outlet 118 of the housing 112, and fastened securely with a fastener. The other end of the rubber hose 122 is connected to the lower end of the transparent cage tube 124 and fixed to the clamp 123 provided on the side wall of the hydraulic tank 130 installed on the upper frame.

At this time, the gauge tube 124 is disposed so as to correspond to a predetermined portion of the housing 120 of the swing reducer so that an appropriate amount of lubricant level is positioned between the lower limit display line 127 and the upper limit display line 128 displayed on the gauge tube 124. do.

According to the above-described configuration, the amount of lubricating oil inside the swing reducer is provided through a transparent gauge tube attached to the outer side wall of the hydraulic tank, not inside the housing of the swing reducer, without the user using a gauge stick installed in the housing of the conventional swing reducer. It can be checked visually easily and quickly.

In addition, since the user can check the amount of lubricating oil stored in the turning reducer from the outside at any time, it is possible to check the oil leakage timing of the lubricating oil very accurately.

Although the example in which the oil level checking apparatus according to the present invention is applied to the swing reducer has been described, it will be apparent to those skilled in the art that the same can be applied to the driving reducer.

Although the present invention has been described with reference to the above embodiments, the protection scope to be protected is not limited by the above embodiments. The protection scope of the present invention is determined by the following claims.

1 is a perspective view showing a swing reducer having a conventional oil gauge.

2 is a cross-sectional view showing a swing reducer having a conventional oil gauge.

3 is a schematic view showing a swing reducer to which an oil level checking device according to a preferred embodiment of the present invention is applied.

4 is a sectional view of an oil level checking apparatus according to a preferred embodiment of the present invention.

Fig. 5 schematically shows the position of the oil level checking apparatus according to the preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: turning reducer

112: housing

114: ring gear

120: oil level check device

130: hydraulic tank

124: gauge tube

127: lower limit line

128: upper limit line

Claims (5)

In the oil level check device fixedly installed on one side of the hydraulic tank to measure the amount of lubricant stored in the swing reducer of the excavator, A discharge port is formed on one side of the housing of the swing reducer, A gauge tube having a closed upper end and an open lower end as a hollow cylinder, and an exhaust hole formed adjacent to the upper end so that lubricant oil can move freely therein, and fixed to the side wall of the hydraulic tank by a clamp; One end is connected to the coupling (119) provided in the outlet, the other end is an oil level check device comprising a rubber hose (122) connected to the lower end of the gauge tube (123). delete delete The method of claim 1, The gauge tube has an upper limit indicator line and a lower limit indicator line, and is installed on a side wall of a hydraulic tank installed at an adjacent point of the swing reducer. delete

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