JPH1026548A - Inspection apparatus for lubricating oil of swiveling reduction gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an inspection apparatus in which a lubricating-oil detection means and an oil discharge means are installed integrally and by which a lubricating oil is inspected easily by a method wherein the lubricating oil is guided to the detection means by a conduit from one lubricating-oil hole formed in a body casing at a swiveling reduction gear and an opening part is formed in the halfway part of the conduit. SOLUTION: A lubricating oil which is housed in a body casing 18 is guided to the inside of a cylindrical member 34 at an oil detection means 4 through a lubricating- oil hole 28, a conduit 30 and a branch conduit 32. Then, an oil face whose height is identical to an oil face inside the body casing 18 is formed at the cylindrical member 34. In addition, when a plug 44 in an opening part 36 in the halfway part of the conduit 30 is removed, a lubricating oil 50 is discharged. An oil level gage 38 is attached when its stopper member is inserted into the cylindrical member 34, and a lubricating- oil-amount display part is inserted into the lubricating oil in this state. The oil level gage 38 is pulled out, the level of the lubricating oil which is stuck to the lubricating- oil-amount display part is read out, and the amount of the lubricating oil inside a swiveling reduction gear 8 is measured and inspected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating oil inspection device for a turning speed reducer provided in a turning mechanism of a hydraulic excavator, a crane truck, a turning work vehicle, and the like. The present invention relates to a lubricating oil inspection device in which an oil detecting means and an oil discharging means are integrally provided.

[0002]

2. Description of the Related Art A typical example of a hydraulic excavator having a swing speed reducer is a swing excavator having a lower traveling body and an upper swing body rotatably mounted on the lower traveling body, and having a swing speed reducer therebetween. A device is provided. 6-39162
Japanese Patent Application Publication No. JP-A-2005-64131 discloses a lubricating oil circulation device for a turning reduction gear. FIG. 3 shows a cross-sectional view of a typical example of a turning speed reducer. This known turning speed reducer includes an oil level gauge device (reference numeral 55 in FIG. 3) which is an oil detecting means for checking an oil amount in order to check lubricating oil stored in the turning speed reducer. A drain pipe as an oil discharging means for discharging lubricating oil (see FIG.
2) is provided.

[0003]

The conventional oil detecting means and the oil discharging means for checking the lubricating oil of the turning reducer have the following problems. (1) Since the oil detecting means and the oil discharging means are provided separately, it is not possible to efficiently check the lubricating oil.
Due to limited space, etc., the swing reduction gear has a small space for storing lubricating oil inside the swing reduction gear, and the amount of lubricating oil is small, so the oil amount should be regularly inspected by oil inspection means, and the oil drainage means It is important to check the deterioration of the lubricating oil and the contamination of the lubricating oil with metal abrasion powder by periodically extracting the lubricating oil sample, and to periodically replace the lubricating oil. Therefore, it is desired to concentrate these dispersed lubricating oil inspection means. (2) Since the oil detecting means and the oil draining means are separately provided on the turning reduction gear, two mounting holes for communicating with lubricating oil are required in the main casing of the turning reduction gear. The number of parts increases. This is a factor that increases the cost of the product. (3) The conventional oil detecting means for checking the oil level of the lubricating oil is provided on the upper part of the casing of the turning reduction gear near the oil level. Since this portion was close to the planetary gear mechanism in the lubricating oil, the lubricating oil surface was agitated and easily foamed, and it was difficult to obtain a stable oil surface for inspection.

[0004] The present invention has been made in view of the above-mentioned facts, and a technical problem thereof is that a lubricating oil detecting means and a draining means are integrally provided, and that the lubricating oil can be easily inspected. It is to provide a lubricating oil inspection device.

[0005]

According to the present invention, in order to solve the above-mentioned technical problems, lubricating oil is detected by a conduit through a lubricating oil hole provided in a main body casing of the rotary speed reducer. Lead to. An opening is provided in the middle of the conduit, and a closing member is attached to the opening so as to be openable and closable to form an oil discharging means.

That is, according to the present invention, as a lubricating oil inspection device for a turning reduction gear that solves the above technical problem, oil inspection for checking the amount of lubricating oil contained in a main casing of the turning reduction gear is performed. And a drainage unit for discharging the lubricating oil, wherein the drainage unit is provided integrally with the oil detection unit, wherein the lubricating oil inspection device for a turning reduction gear is provided. Is provided.

[0007] In a preferred embodiment, the oil draining means comprises:
An opening provided in a conduit for guiding the lubricating oil of the casing to the oil detecting means, and an opening / closing means attached to the opening are provided.

[0008] In the lubricating oil inspection device for a turning speed reducer according to the present invention, an oil detecting means and an oil discharging means are mounted on a conduit mounted on a casing of the turning speed reducer.
Therefore, it is possible to provide a lubricating oil inspection device in which the oil detecting means and the oil discharging means are integrated and arranged in a concentrated manner.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a preferred embodiment of a lubricating oil inspection device for a turning speed reducer according to the present invention.

[0010] Referring to FIG.
The lubricating oil inspection device indicated by has an oil detecting means 4 and an oil discharging means 6. The lubricating oil inspection device 2 is provided side by side with the turning speed reducer 8.

The turning speed reducer 8 is provided with
This is a well-known device whose structure is clearly disclosed in Japanese Patent Publication No. 2 (JP-A) No. 2 (1994). The illustration of the cross section is omitted in FIG.
The turning reduction gear 8 includes a hydraulic motor 10 driven by hydraulic pressure from a hydraulic source (not shown), and a hydraulic motor 10
And a planetary gear reducer 12 that reduces the mechanical rotational output of the hydraulic motor 10 and outputs the mechanical rotational output. The reduced rotation output of the planetary gear reducer 12 projects below the turning reducer 8 and is output by a pinion shaft 14 having a vertical rotation axis. The hydraulic motor 10 and the planetary gear reducer 12 are integrally connected by a plurality of bolts 20. A breather 16 is provided at an upper portion of the planetary gear reducer 12 near the hydraulic motor 10 to communicate a space inside a main body casing 18 of the turning reducer 8 with the outside air.

The main body casing 18 of the revolving speed reducer 8 is fixedly mounted on a revolving frame 22, which is one of the frames which are relatively revolved. A swivel bearing 24 having a vertical swivel center axis 24a is provided between the other of the frame that swivels relatively to the swivel frame 22 and a support frame 26 that is normally fixed. The swing frame 22 and the support frame 26 are provided via the swing bearing 24.
Is attached so as to be pivotable about a pivot center axis 24a. An internal gear is formed on the inner ring 24 b of the slewing bearing 24, and meshes with the pinion shaft 14. When the pinion shaft 14 rotates, the turning frame 22 turns with respect to the support frame 26. By controlling the rotation direction and rotation speed of the hydraulic motor 10, the turning frame 2
2, the rotation direction and the rotation speed are controlled.

A lubricating oil hole 28 is formed below the main casing 18 at a portion where the lubricating oil contained in the main casing is easily discharged. One end of a conduit 30 formed of a pipe member is screwed into the lubricating oil hole 28 and screwed to the lubricating oil hole 28 by screw means formed on the outer diameter surface of the end. At the other end of the conduit 30, a T-shaped branch conduit 32 is attached by screwing a screw provided on the outer diameter surface of the end portion of the conduit 30 and a screw provided on the inner diameter surface of the branch conduit 32. Have been. A vertically extending cylindrical member 34 forming the oil detecting means 4 is screwed and connected to one branch opening of the branch conduit 32. Branch conduit 32
The other branch opening forms a part of the oil discharging means 6 as the opening 36 (the oil discharging means 6 will be described later in detail). A rod-shaped oil level gauge 38 for measuring the oil level is inserted into the cylindrical member 34 (the oil level gauge 38 will be described later in detail). Cylindrical member 34
Is the bolt 20 of the turning speed reducer 8 in the middle of the longitudinal direction.
Is fixed and held by a clamp 42 to a bracket 40 fixed to the bracket 40.

At the opening 36 of the branch conduit 32, a screw is provided on the inner diameter surface, and a blind plug 44 provided with a screw on the outer diameter surface as an opening / closing means is attached to the opening 36, and the opening 36 is opened / closed. It is free. Thus, the opening 36 and the blind plug 44 form the oil draining means 6.
An opening 22 a for discharging oil to the outside of the turning frame 22 is provided in the turning frame 22 below the oil discharging means 6.
Is provided. In addition, a valve means that can be opened and closed can be used as the opening and closing means.

The relationship of the lubricating oil between the turning reducer 8 and the lubricating oil inspection device 2 will be described with reference to FIG. First, the measurement and inspection of the oil amount by the oil detecting means 4 will be described.
The lubricating oil 50 contained in the lubricating oil 8 is supplied to the lubricating oil hole 28 and the conduit 3.
0, through the branch conduit 32, the cylindrical member 34 of the oil detecting means 4
Guided inside. The oil surface 46b having the same height as the oil surface 46a in the main body casing 18 is connected to the cylindrical member 34.
Is formed. The oil level 46b is checked by the oil level gauge 38. The lubricating oil amount display section 38b provided on the oil level gauge 38 is engraved with "H" and "L" at predetermined intervals, and the lubricating oil level, that is, the oil level is H (high) and L. (Low) means normal. The oil level gauge 38 is attached by inserting the plug member 38c into the cylindrical member 34, and in this state, the lubricating oil amount display portion 38b
It is inserted into the lubricating oil 50. By pulling out the oil level gauge 38 and reading the level of the lubricating oil attached to the lubricating oil amount display portion 38b, the amount of the lubricating oil 50 in the turning reduction gear 8 can be measured and inspected. here,
The oil level 46b is agitated by the planetary gear mechanism in the main body casing 18 and is separated from the oil level 46a having large fluctuations, so that a stable oil level for measurement and inspection is provided.

Next, the discharge of the lubricating oil by the oil discharging means 6 will be described. The lubricating oil 50 accommodated in the main body casing 18 passes through the lubricating oil hole 28 and the conduit 30 to the opening 36 of the branch conduit 32. It is guided and closed by the plug 44. Then, by removing the plug 44 of the opening 36, the lubricating oil 50 can be discharged. The breather 16 provided on the upper part of the main body casing 18 includes:
At the time of oil drainage, outside air is guided to an upper space in the main body casing 18 to facilitate discharge of the lubricating oil 50. The discharged lubricating oil 50 passes through the opening 22a of the revolving frame 22,
It is housed in a suitable container outside the revolving frame 22. When the lubricating oil is exchanged regularly, the lubricating oil 50 is completely discharged, and when the lubricating oil sample is periodically extracted, only the required amount is discharged.

[0017]

According to the turning speed reducer lubricating oil inspection device constructed in accordance with the present invention, (1) the lubricating oil detecting means and the draining means of the turning speed reducer are arranged in a concentrated manner. Inspection of lubricating oil can be performed efficiently. (2) Since the oil detecting means and the oil discharging means are mounted with one lubricating oil hole in the main body casing of the turning speed reducer, the number of drilling steps and the number of parts can be reduced, and the cost of the product can be reduced. it can. (3) Since the lubricating oil level for oil inspection is kept away from the planetary gear mechanism, inspection can be performed with a stable oil level.

[Brief description of the drawings]

FIG. 1 is a side view of a lubricating oil inspection device configured according to the present invention.

FIG. 2 is an explanatory diagram schematically showing a state of a lubricating oil and the like in a lubricating oil inspection device configured according to the present invention in a schematic sectional view.

[Explanation of symbols]

 2: Lubricating oil inspection device 4: Oil inspection means 6: Drainage means 8: Rotating reducer 18: Main casing 30: Conduit 32: Branch conduit 36: Opening 44: Blind plug (opening / closing means) 50: Lubricating oil

Claims (2)

[Claims] An oil detecting means for checking an amount of lubricating oil contained in a main body casing of a turning reduction gear, and an oil discharging means for discharging the lubricating oil, wherein the oil discharging means is provided. A lubricating oil inspection device for a swing speed reducer is provided integrally with the oil detecting means. 2. The oil draining means comprises an opening provided in a conduit for guiding the lubricating oil to the oil detecting means, and an opening / closing means attached to the opening. A lubricating oil inspection device for a turning reduction gear as described in the above.