KR20140103483A - Oil level gauge for construction machine - Google Patents

Oil level gauge for construction machine Download PDF

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Publication number
KR20140103483A
KR20140103483A KR1020130016904A KR20130016904A KR20140103483A KR 20140103483 A KR20140103483 A KR 20140103483A KR 1020130016904 A KR1020130016904 A KR 1020130016904A KR 20130016904 A KR20130016904 A KR 20130016904A KR 20140103483 A KR20140103483 A KR 20140103483A
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KR
South Korea
Prior art keywords
connecting member
plug
gauge
oil level
level gauge
Prior art date
Application number
KR1020130016904A
Other languages
Korean (ko)
Inventor
최원길
Original Assignee
볼보 컨스트럭션 이큅먼트 에이비
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 볼보 컨스트럭션 이큅먼트 에이비 filed Critical 볼보 컨스트럭션 이큅먼트 에이비
Priority to KR1020130016904A priority Critical patent/KR20140103483A/en
Publication of KR20140103483A publication Critical patent/KR20140103483A/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
    • E02F9/12—Slewing or traversing gears
    • E02F9/121—Turntables, i.e. structure rotatable about 360°
    • E02F9/126—Lubrication systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N19/00—Lubricant containers for use in lubricators or lubrication systems
    • F16N19/003—Indicating oil level
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/40—Special vehicles
    • B60Y2200/41—Construction vehicles, e.g. graders, excavators
    • B60Y2200/412—Excavators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/40—Special vehicles
    • B60Y2200/41—Construction vehicles, e.g. graders, excavators
    • B60Y2200/416—Cranes

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Abstract

The present invention relates to an oil level gauge for construction machine. The oil level gauge for construction machine comprises a plug installed in the top of a lubricating oil injection pipe formed on a turning unit to maintain the airtightness of the inner circumference of the lubricating oil injection pipe; a connection member having an internal air circulation path and installed in the plug to communicate the indoor and outdoor air of the turning unit through the upper and lower parts of the air circulation path; a handle part arranged in the upper part of the connection member; and a gauge part arranged in the lower part of the connection member. The present invention can effectively prevent the spoilage of lubricating oil stored in the turning unit by preventing moisture or a cleaning solution from being mixed with the lubricating oil while being introduced from the outside into the turning unit through the lubricating oil injection pipe and by controlling the rising of air pressure caused by oil mist in the turning unit using the air circulation path of the connection member installed in the plug; thereby improving the performance and durability of the turning unit and also improving the exchangeability and durability of the oil level gauge. Also, the present invention can prevent the handle part from being easily stepped by a user or from being easily damaged by external influence since the handle part is rotated in one direction not to protrude from the plug.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an oil level gauge for a construction machine,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil level gauge for a construction machine, and more particularly, to an oil level gauge for a construction machine, which can prevent moisture, washing liquid and foreign matter from flowing into the revolving unit through an oil level gauge Oil level gauge.

Generally, a construction machine such as an excavator, a crane or the like 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 drive source, A hydraulic pressure control valve for controlling the hydraulic pressure, and a hydraulic actuator for generating a driving force.

The drive system includes a swing unit that allows the upper swing body to swing at an upper portion of the lower traveling body. The swing unit includes a swing motor for generating an electric torque by the hydraulic pressure of the hydraulic pump, And a gear box that decelerates the rotational force of the swing motor to a state suitable for traveling.

In addition, the swing motor and the gear box are integrally formed, and a constant level of lubricating oil (gear oil) is always stored in the gear box for smooth operation of the swing unit.

In addition, a lubricating oil injection pipe having a pipe shape is provided at one end of the gear box so as to replenish the lubricating oil. The lubricating oil injection pipe is provided with a plug provided at the injection port of the lubricating oil injection pipe, The oil level gauge comprising the handle and the gauge formed on the lower side of the plug is installed, so that the lubricant level stored in the gear box can be effectively confirmed by using the oil level gauge.

On the other hand, a prior art relating to such an oil level gauge has already been proposed in Korean Patent Publication No. 10-2013-0007852. However, the conventional oil level gauge has the following problems.

That is, FIG. 1 shows the structure of a conventional oil level gauge. In the turning unit 10, a lubricant injection tube 20 having an injection port 21 is formed at an upper end thereof for injecting lubricant, An oil level gauge 30 including a handle 31, a plug 32 and a gauge 33 is detachably installed in the pipe 20.

Therefore, when it is desired to check the lubricant state using the oil level gauge 30, the grip 31 held on the plug 32 of the oil level gauge 30 is gripped, and then the plug 32 is pulled to pull the oil level gauge 30 can be drawn out from the lubricant injection tube 20 and the lubricant coming out through the gauge 33 under the plug 32 can be judged and the level can be confirmed.

In order to prevent the oil pressure from rising due to such oil vapor in the turning unit 10, conventionally, the outer periphery of the plug of the oil level gauge 30 and the inlet 21 of the lubricant oil injection pipe 20 (Not shown in the figure) at a specific position of the lubricant injection tube 20 or the plug 32 so that the air can be circulated to increase the air pressure due to the vapor Thereby preventing the plug 32 from being disengaged from the lubricant injection tube 20.

However, in such a conventional case, foreign substances such as cleaning liquid and fine dust mixed with external moisture or surfactant are introduced into the turning unit 10 through the lubricating oil injection pipe 20 due to the gap 34 or hole formed for air circulation. So that the performance and durability of the turning unit 10 are lowered.

The handle 31 of the oil level gauge 30 is protruded from the upper surface of the plug 32 provided at the injection port 21 of the lubricant injection pipe 20 so that the operator may be stepped on unintentionally, So that it is easily damaged by the impact.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is therefore an object of the present invention to provide a swirling unit, Performance level and durability of the oil level gauge, and at the same time, it is possible to effectively solve the problem that the handle of the oil level gauge is easily broken.

According to a preferred embodiment of the present invention,

A plug installed on the upper end of the lubricant injection pipe for maintaining the airtightness of the inner periphery of the lubricant injection pipe formed in the turning unit; A connecting member provided on the plug so that the inside and outside of the turning unit can be ventilated through the upper and lower sides of the air circulation passage; A handle provided on an upper portion of the connecting member; And a gage portion provided at a lower portion of the connecting member.

More preferably,

The plug is related to being made of a material having elasticity for airtightness.

More preferably,

The plug is made of a synthetic resin or a metal material, and is related to a sealing member at the outer periphery of the plug for keeping the plug sealed with the lubricant injection tube.

More preferably,

The connecting member is related to being fixed to the handle portion and the gage portion integrally.

More preferably,

The connecting member penetrates the plug vertically so that the upper side of the air circulation passage is located outside the lubricant oil injection pipe and the lower side of the air circulation passage is located inside the lubricant oil injection pipe. The sectional shape of the air circulation passage is circular, oval or polygonal It is related to any one of them.

More preferably,

The connecting member is related to a steel material coated with an anti-corrosive paint or a material made of either a non-ferrous metal or a synthetic resin.

More preferably,

A lower portion of the connecting member is provided with a foreign matter storage portion in which water and foreign matter introduced through the air circulation passage of the connecting member can be collected and stored, and auxiliary vents are provided for discharging the vapors generated in the vortex unit.

More preferably,

The foreign matter storage unit may be configured such that a lower portion of the connecting member is formed in a trap shape so that moisture and foreign matter can be collected and stored in a downward curved portion and the auxiliary ventilation hole is formed through the surface of the connecting member located above the storage means .

More preferably,

The lower end of the handle is related to being rotatably coupled to the upper portion of the connecting member.

More preferably,

The upper end and the lower end of the connecting member are formed in an annular shape having a fitting portion. A fastening hole is formed at the lower end of the knob portion and the upper end of the gauge portion to fasten the fitting portion and the fastening hole with the fastening member, Wherein the gauge portion is configured to be hinged.

More preferably,

The upper end and the lower end of the connecting member and the upper end of the gauge portion are respectively formed in a ring shape having a fitting portion so that the fitting portion of the connecting member and the fitting portion and the fitting portion of the connecting member and the gauge portion are directly coupled.

More preferably,

The upper end and the lower end of the connecting member and the upper end of the gauge portion are respectively formed in a ring shape having a fitting portion and the fitting portion of the connecting member and the handle portion and the fitting portion of the gauge portion are indirectly coupled through the fastening member .

More preferably,

Either the upper end or the lower end of the connecting member is related to a spiral shape having a fitting portion.

More preferably,

Both the upper end and the lower end of the connecting member are related to a spiral shape having a fitting portion.

In the present invention, a connecting member having an air circulation passage is provided to allow a plug installed to maintain the airtightness of the lubricant injection tube to communicate with the inside and the outside of the lubricant injection tube, so that moisture, cleaning liquid, It is possible to prevent the lubricating oil from being introduced into the turning unit and to be mixed with the lubricating oil through the air circulation passage of the connecting member provided in the plug, It is possible to effectively prevent the deterioration of the lubricating oil, thereby improving the performance and durability of the turning unit, and improving the replaceability and durability of the oil level gauge.

Further, the handle portion connected to the upper end of the connecting member and positioned at the upper portion of the plug can be rotated to one side so as not to protrude from the plug, thereby effectively solving the problem that the handle portion is easily touched by the operator or easily damaged by external influences.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a principal perspective view showing an oil level gauge installed in a lubricating oil injection pipe of a conventional turning unit. FIG.
FIG. 2A is a perspective view illustrating a connection member, a handle, and a gauge unit according to an embodiment of the present invention. FIG.
FIG. 2B is a perspective view illustrating a connection state of a connecting member, a handle, and a gauge according to an embodiment of the present invention. FIG.
FIG. 2C is a cross-sectional view of a main part illustrating a coupling state of the connecting member, the handle, and the gauge unit according to an embodiment of the present invention.
FIG. 3A is a perspective view illustrating a connection member, a grip portion, and a gauge portion according to another embodiment of the present invention. FIG.
FIG. 3B is a perspective view showing a connection state of the connecting member, the handle, and the gauge according to another embodiment of the present invention. FIG.
FIG. 4A is a perspective view illustrating a connection member, a handle, and a gauge, according to another embodiment of the present invention. FIG.
FIG. 4B is a perspective view illustrating a connection state of the connecting member, the handle, and the gauge according to another embodiment of the present invention. FIG.
5A is a perspective view showing another embodiment of the connecting member according to the present invention.
5B is a front view showing another embodiment of the connecting member according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It will be understood by those of ordinary skill in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

In addition, the sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation, and the terms defined specifically in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user, operator And such terms should be set forth based on their content throughout this specification.

The present invention relates to an oil level gauge installed in a turning unit of a construction machine. The oil level gauge according to an embodiment of the present invention includes a plug installed in a lubricating oil injection tube formed in a turning unit, A connecting member for allowing the inside and outside of the pipe to communicate with each other, a grip portion provided at the upper and lower ends of the connecting member, and a gauge portion for measuring the amount of the lubricating oil. Hereinafter, with reference to each of the components 2a, 2b and 2c As follows.

The plug 100,

The lower portion of the plug 100 is located inside the lubricant injection tube 600 and the upper portion of the plug 100 is located outside the lubricant injection tube 600 And the outer periphery of the lower portion of the plug 100 is closely attached to the inner periphery of the lubricant injection tube 600 to maintain the airtightness of the lubricant injection tube 600.

The plug 100 may be made of a material having elasticity such as rubber, urethane or silicone to maintain the airtightness of the lubricant injection tube 600. The plug 100 may be made of synthetic resin or metal And a sealing member (not shown in the figure) such as an O-ring or the like is provided around the lower outer periphery of the plug made of such synthetic resin or metal material so that the airtightness of the lubricant injection tube 600 is maintained through the sealing member You may.

Therefore, it is possible to prevent external moisture, washing liquid, foreign matter, and the like from flowing into the lubricating oil injection pipe 600 through the contact portion between the plug 100 and the lubricating oil injection pipe 600, Leakage of the lubricating oil stored in the lubricating oil injection pipe 600 through the contact portion between the plug 100 and the lubricating oil injection pipe 600 can also be prevented.

The connecting member (200)

When the plug 100 is installed in the injection port 610 of the lubricant injection tube 600 to maintain the airtightness of the lubricant injection tube 600, the plug 100 The connecting member 200 is provided with an air circulation passage 210. The upper portion of the air circulation passage 210 is connected to the upper portion of the plug 100 through a lubricant injection pipe And the lower side of the air circulation passage 210 is located inside the lubricant injection tube 600. The inner and outer parts of the turning unit 210 are connected to each other through the air circulation passage 210 of the connecting member 200, The inside and the outside of the lubricating oil injection pipe 600 installed in the turning unit can be ventilated.

The shape and length of the connecting member 200 provided on the plug 100 satisfy the conditions for allowing the inside and the outside of the lubricating oil injection pipe 600 to be hermetically sealed by the plug 100 to be ventilated, It can be variously modified.

In the embodiment of the present invention, the connecting member 200 is formed in the shape of a pipe penetrating up and down, and the inside of the connecting member 200 becomes the air circulating passage 210, The inner and outer portions of the lubricant injection tube 600, which are kept airtight by the lubricant injection pipes 100, 100, can be ventilated.

The cross section of the air circulation passage 210 may be modified into various shapes. In the embodiment of the present invention, the cross section of the air circulation passage 210 is circular. However, the cross section of the air circulation passage 210 may be an ellipse, And can be modified into various shapes.

The upper and lower ends of the connecting member 200 having the air circulation passage 210 are respectively provided with a grip portion 300 and a gage portion 400 to be described later, The grip portion 300 and the gage portion 400 may be formed by integrally forming the grip portion 300 and the gage portion 400 in the connecting member 200. [

The connecting member 200 may be made of various materials, but it may be made of a material such as a steel material coated with an anti-corrosive paint on its inner and outer surfaces, or a non-ferrous metal, synthetic resin, or the like.

Since the connecting member 200 is provided with the air circulation passage 210 therein, external moisture, washing liquid, foreign matter, and the like may flow into the air circulation passage 210, It is necessary to prevent moisture, washing liquid, foreign matter, or the like flowing through the air circulation passage 210 from being mixed into the lubricating oil inside the turning unit.

Accordingly, as shown in FIG. 2C, the lower portion of the connecting member 200 is formed in a trapezoidal shape such as a "U" shape and the downward curved portion is configured to be the foreign matter storage portion 211, Even if water or washing liquid or foreign matter flows into the downwardly curved foreign matter storage unit 211, moisture, washing liquid, foreign matter or the like can be prevented from being mixed into the lubricating oil inside the turning unit.

The coupling member 200 may be connected to the lubricant injection pipe 600 together with the plug 100 if necessary. The lubricant injection pipe 600 may be formed of a synthetic resin, And then blowing air into the air circulation passage 210 of the connecting member 200 to easily remove moisture, washing liquid, foreign matter, and the like.

The air circulation passage 210 of the connecting member 200 serves to ventilate the inside and the outside of the lubricating oil injection tube 600 blocked by the plug 100 and thus the foreign matter storage portion 211 is formed in the connecting member 200 In the case where moisture, washing liquid, foreign matter, or the like is accumulated in the foreign matter storing portion 211, the air circulating passage 210 of the connecting member 200 is blocked by the foreign matter storing portion 211, The circulation passage 210 can not perform the function of ventilation.

Therefore, the auxiliary air holes 212 communicating with the internal air circulation passage 210 are formed on the surface of the connecting member 200 located above the foreign matter storage portion 211, so that moisture or moisture stored in the foreign matter storage portion 211 Even if the air circulation passage 210 is shut off due to a foreign matter or the like, the vortex of the turning unit is transmitted to the outside of the lubricating oil injection pipe 600 through the auxiliary circulation hole 212 of the connecting member 200, the air circulation passage 210, And the air circulation function can be continuously performed.

The grip portion 300 is provided with a handle-

The grip portion 300 is a part that is positioned at the upper end of the connecting member 200 and grips the oil level gauge when the oil level gauge is taken out or stored from the lubricant injection tube 600. The grip portion 300 extends the connecting member 200 as it is, But may be fixed or detachable to the upper end of the connecting member 200 while having a different shape.

The handle 300 may be fixed to the connecting member 200 to prevent the handle 300 from rotating when the handle 300 is fixedly mounted on the upper end of the connecting member 200. However, And is rotatably fixed to the upper end of the connecting member 200.

Therefore, when the pull tab 300 is not used, the pull tab 300 is rotated downward so that the pull tab 300 is not projected to the upper portion of the plug 100 but is laid laterally, 300 can be easily stepped in the moving process of the operator or easily exposed to an external impact.

The gage section (400)

(Not shown in the drawing) such as a scale is formed on the lower surface to accurately measure the amount of lubricating oil in the turning unit. Such a gage unit 400 extends the lower portion of the connecting member 200 as it is, Or may be integrally formed, but may have a separate shape, and may be formed in a fixed form at the lower end of the connecting member 200, and may be formed in a separated form for the purpose of replacement if necessary.

2A, 2B and 2C illustrate a connecting member according to an embodiment of the present invention. The upper and lower ends of the connecting member 200 are formed in a ring shape so as to have a fitting portion 220, The shape of the part 220 may be modified in various shapes such as a circular shape, an elliptical shape, or a polygonal shape depending on the shape of the bent ring. Preferably, the air circulation passage 210 located at the upper end of the connecting member 200 The air circulation passage 210 located at the lower end of the connection member 200 can be prevented from being easily connected to the air circulation passage 210. [ And a foreign matter storage unit 211 is provided at the lower end of the member 200.

The fastening holes 310 and 410 are formed at the lower end of the grip 300 and the upper end of the gage 400 to fasten the fastener 310 of the grip 300 to the fastener 220 of the fastener 300, And the hinge coupling part 500 of the gage part 400 is hinged to the hinge coupling part 500 through a coupling member 500 such as a rivet. Accordingly, the handle 300 can be configured not to be rotated from the connecting member 200, and the handle 300 can be configured to be rotatable.

3A and 3B illustrate a connecting member according to another embodiment of the present invention. The upper and lower ends of the connecting member 200 are formed in a ring shape so as to have a fitting part 220, The lower end of the connecting member 200 and the upper end of the gauge unit 400 are inserted into the fitting part 220 at the upper and lower ends of the connecting member 200 and then bent into a ring shape to form the fitting parts 320 and 420, The lower end of the handle 300 and the fitting portions 320 and 420 at the upper end of the gage 400 may be directly connected to the upper and lower fitting portions 220 as chain coupling.

4A and 4B illustrate a connecting member according to another embodiment of the present invention. The upper and lower ends of the connecting member 200 are formed in a ring shape to have a fitting part 220, and the knob part 300 And the lower end of the grip part 400 and the upper end of the gauge part 400 are formed in a ring shape so as to have the fitting parts 320 and 420. The fitting part 220 and the lower part of the grip part 300, 320 and 420 that are aligned with each other in a state where the fitting portions 320 and 420 of the upper portion of the gage 400 are aligned with each other are hingedly coupled to each other through the fastening member 500 You can do it.

5A and 5B illustrate a connecting member according to another embodiment of the present invention. The upper and lower ends of the connecting member 200 may be bent in a ring shape so as to form the fitting portion 220, The lower end of the connection member 200 may be formed in a helical shape in which both the upper end and the lower end are formed with the fitting portion 220. In the case of the lower end of the connection member 200, And can more effectively block moisture, washing liquid, foreign matter, and the like flowing through the connecting member 200.

The oil level gauge having such a structure is configured such that the outer circumference of the plug 100 and the inner circumference of the lubricant oil injection pipe 600 are kept airtight from each other so that the lubricating oil inside the revolving unit is guided to the outer periphery of the plug 100 and the lubricant injection pipe 600 The outer periphery of the plug 100 and the inner circumferential surface of the lubricant injection tube 600 can be prevented from leaking through the contact portion of the inner circumference of the plug 100 or the outer moisture,

The increase in the air pressure due to the vapor inside the turning unit can be controlled through the air circulation passage 210 of the connecting member 200 installed vertically through the plug 100.

The water or the washing liquid and the foreign substances introduced through the air circulation passage 210 of the connecting member 200 are stored by the foreign substance storage unit 211 provided at the lower portion of the connecting member 200, Foreign matter or the like can be prevented from being mixed into the lubricating oil in the turning unit.

The handle 300 is rotatably coupled to the connecting member 200 so that the handle 300 is vertically upwardly positioned from the plug 100 when the handle 300 is in use, When the grip portion 300 is not used, the grip portion 300 is rotated to one side of the plug 100 and laid down, so that the grip portion 300 can be easily pulled out from the grip portion 300, The plug 300 protrudes from the upper portion of the plug 100 to prevent the plug 300 from being easily stepped on by the operator or easily damaged by an external impact.

Although the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be defined by the appended claims and equivalents thereof.

100: plug 200: connecting member
210: air circulation passage 211: foreign matter storage unit
212: auxiliary vent hole 220:
300: handle portion 310: fastening hole
320: fitting portion 400:
410: fastening hole 420:
500: fastening member 600: lubricating oil injection pipe
610:

Claims (14)

An oil level gauge installed in a turning unit for a construction machine,
A plug installed on the upper end of the lubricant injection tube for maintaining the airtightness inside the lubricant injection tube formed in the turning unit;
A connecting member provided on the plug so that the inside and the outside of the turning unit are allowed to pass through the upper and lower sides of the air circulation passage with the air circulating passage provided therein;
A handle provided on an upper portion of the connecting member; And
A gage provided at a lower portion of the connecting member;
And an oil level gauge for a construction machine.
The method according to claim 1,
Wherein the plug is made of a material having an elastic force to maintain airtightness.
The method according to claim 1,
Wherein the plug is made of a synthetic resin or a metal material and is further provided with a sealing member around the outer periphery of the plug to maintain the airtightness of the lubricant oil inlet pipe.
The method according to claim 1,
Wherein the connecting member is integrally fixed to the handle portion and the gauge portion.
The method according to claim 1,
Wherein the connecting member penetrates the plug vertically so that the upper side of the air circulation passage is located outside the lubricant oil injection pipe and the lower side of the air circulation passage is located inside the lubricant oil injection pipe, and the sectional shape of the air circulation passage is circular or elliptical And a polygon of the oil level gauge.
The method according to claim 1,
Wherein the connecting member is made of a steel material coated with an anticorrosion paint, or a non-ferrous metal or a synthetic resin.
The method according to claim 1,
A lower portion of the connecting member is provided with a foreign matter storage portion for collecting moisture and foreign matter introduced through the air circulation passage of the connecting member and auxiliary vents for discharging the vapors generated in the vortex unit. Oil level gauges for construction machinery.
8. The method of claim 7,
The foreign matter storage unit may be configured such that a lower portion of the connecting member is formed in a trap shape so that moisture and foreign matter can be collected and stored in a downwardly curved portion and the auxiliary ventilation hole is formed to penetrate the surface of the connecting member located above the storage unit The oil level gauge for a construction machine.
The method according to claim 1,
Wherein the lower end of the handle is rotatably coupled to an upper portion of the connecting member.
The method according to claim 1,
Wherein the upper end of the connecting member and the lower end of the connecting member are formed in a ring shape having a fitting portion and a fastening hole is formed at the lower end of the knob portion and the upper end of the gauge portion to fasten the fastening hole and the fastening hole, And the gauge unit is hinged to the hinge unit.
The method according to claim 1,
The upper end and the lower end of the connecting member and the upper end of the grip portion and the upper end of the gauge portion are respectively formed in the form of a ring having a fitting portion and the fitting portion of the connecting member and the grip portion and the fitting portion of the connecting member and the gauge portion are directly coupled Features an oil level gauge for construction equipment.
The method according to claim 1,
And the upper end of the connecting member and the lower end of the connecting member and the upper end of the gauge unit are respectively formed in the form of a ring having a fitting portion and the fitting portion of the connecting member and the handle portion and the fitting portion of the connecting member and the gauge portion are indirectly And the oil level gauge for a construction machine.
13. The method according to any one of claims 10 to 12,
Wherein one of the upper end and the lower end of the connecting member is formed in a spiral shape having a fitting portion.
13. The method according to any one of claims 10 to 12,
Wherein an upper end and a lower end of the connecting member are formed in a spiral shape having a fitting portion.











KR1020130016904A 2013-02-18 2013-02-18 Oil level gauge for construction machine KR20140103483A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190071962A (en) 2017-12-15 2019-06-25 현대자동차주식회사 Level Marker Isolation type Oil Level Gauge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190071962A (en) 2017-12-15 2019-06-25 현대자동차주식회사 Level Marker Isolation type Oil Level Gauge

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