KR101690486B1 - Oil tank drain device - Google Patents

Abstract

An oil tank drain device of the present invention comprises: a coupling nut airtightly assembled outside a coupling hole formed on a bottom surface of an oil tank; a body coupled to the coupling nut to be sealed, having a bolt unit with an oil discharge hole; a sealing cap made of an elastic material equipped inside a supporting plate hinge-assembled to the body to open and close the oil discharge hole; and an opening and closing rod positioned on a lower side of the sealing cap having a cam unit limiting the opening, the closing, and the rotation of the sealing cap by pressing the supporting plate while reciprocating on a left and a right side of the body. According to the present invention, the oil tank drain device is capable of conveniently discharging oil and stopping the oil discharged using the sealing cap opened and closed in a rotary type by the opening and closing rod horizontally reciprocating and completely discharging the oil and metal scraps remaining on a bottom surface of the oil tank by installing the coupling nut outside the bottom surface of the oil tank. In addition, the oil tank drain device is capable of providing convenience to a worker to prepare other tasks during an oil draining task by conveniently maintaining an open state of the sealing cap by simply rotating the opening and closing rod on an opening position while the oil is discharged. Additionally, the oil tank drain device is capable of accurately discharging the oil into an oil collecting container without staining a workers body by discharging the oil falling in a vertical direction only to a front side with a guide equipped with the supporting plate, thereby obtaining an effect of preventing a contamination of a working area.

Description

[0001] Oil tank drain device [0002]

The present invention relates to an oil tank drain apparatus capable of discharging engine oil more easily from an oil tank accommodating engine oil and the like of an automobile while allowing the engine oil to be discharged completely without leaving oil on the bottom of the oil tank.

In general, it is desirable to periodically replace the engine, transmission oil, and the like of an automobile. It is desirable to recover the metallic debris generated by the mechanical friction during operation of the engine and the transmission together with the engine oil (or the mission oil).

Korean Patent No. 10-0370785 discloses a drain valve of an oil pan as a first prior art related to a conventional oil tank drain device and Korean Patent No. 10-0254562 discloses an oil pan drain Plug " has been disclosed.

However, the conventional drain structure of the oil tank according to the first and second prior arts is a simple structure in which the drain plug is assembled to the nut provided so as to be kept airtight with the drain discharge hole at the bottom of the oil tank as shown in Figs. 1 and 2 The remaining amount of the oil corresponding to the height of the nut is always left, so that the metal residue contained in the oil can not be discharged together.

When replenishing new oil in this state, metal debris mixed with freshly replenished oil, causing metal debris to damage the surface of the component as the engine or transmission is activated.

In addition, the conventional oil drain structure has a problem that oil (waste oil) falls vertically when the outlet is opened, so that oil (waste oil) is buried in the hands of workers and scattered to the periphery, .

Korean Patent No. 10-0370785 (Jan. 21, 2003) Korean Patent No. 10-0254562 (February.2,2000)

An object of the present invention is to provide an oil tank drain device capable of completely discharging oil remaining on the bottom of an oil tank and discharging the engine oil stored in the oil tank more conveniently.

An object of the present invention is to provide an oil tank drain device which is capable of preventing contamination of an operator and a work site in the process of discharging oil (waste oil) by causing the oil discharge to be introduced laterally.

According to the present invention, a coupling nut is assembled in an airtight structure from the outside of a coupling hole formed in a bottom surface of an oil tank drainage device; A body fastened to the fastening nut by a sealing structure and having a bolt portion formed with an oil discharge hole; A sealing cap of an elastic material provided inside a support plate hinged to the body to open and close the oil discharge hole; And a cam portion which is located below the sealing cap and which reciprocates left and right with respect to the body, and presses the supporting plate to intermittently open and close the rotation of the sealing cap.

According to the present invention, the elastic member is provided at one side of the opening / closing rod so that the cam portion elastically presses the support plate to maintain the closed state of the oil discharge hole. .

According to the present invention, the opening and closing rod is reciprocally supported through a guide hole formed in at least one vertical support portion provided in the body, the elastic member is provided between the vertical support portion and the cam portion, So that the sealing cap can be opened and closed.

According to the present invention, the opening / closing rod is formed with a locking protrusion formed on the outer surface of the opening / closing rod and guiding the locking part formed on the inner circumference of the guide hole. The locking part has a length corresponding to the reciprocating distance of the cam, When the cam portion is in a position where the contact portion is released from the support plate, after the end portion of the engagement portion passes through the engagement groove, the opening and closing rod is rotated to one side so that the engagement portion is supported on the side surface of the vertical support portion, .

According to the present invention, the opening and closing rod may be configured to be screwed together with at least one vertical supporting portion provided on the body so as to reciprocate left and right, and press the support plate to intermittently open and close the sealing cap.

According to the present invention, it is possible to further include a lock nut for interrupting the closed state of the opening and closing rod.

According to the present invention, the sealing cap may be made of an elastic material such as synthetic rubber or silicon having resistance to chemicals, heat resistance, and hardenability in accordance with oil characteristics.

According to the present invention, the sealing cap has a substantially cylindrical shape at its lower end and is formed integrally with the support plate by insert injection molding with the inner side surface of the support plate, or separately molded and fixedly assembled with the support plate, And the upper end of the sealing cap may be fitted to the oil discharge hole by a pressing force of the cam portion after the sealing cap is in close contact with the chamfered portion formed at the outlet of the oil discharge hole.

According to the present invention, it is possible to further include a lock member for interrupting the closed state of the opening and closing rod. The locking member may be a locking pin which is fitted in a locking hole formed at a position adjacent to a side wall of the vertical support in a closed reference of the sealing cap.

According to the present invention, the support plate may further include a guide portion formed around the sealing cap to guide the oil to be discharged laterally.

According to the present invention, there are provided a bracket that is formed to be downwardly protruded on opposite sides of a fastening hole formed on a bottom surface of an oil tank; A support plate rotatably installed on one side of the coupling hole through which oil is discharged from the bottom surface of the oil tank to open and close the coupling hole; An opening / closing rod disposed on the bottom surface of the oil tank so as to be spaced apart from the bottom surface of the oil tank and reciprocally moved in a state of being inserted through the bracket and having a cam portion for rotating the support plate; An elastic member provided between the handle of the opening and closing rod and the bracket adjacent thereto to provide an elastic force to the reciprocating movement of the opening and closing rod; And a stopper which is detachably attached to an engagement groove formed on one outer peripheral surface of the opening / closing rod and controls the movement of the opening / closing rod.

Embodiments of the present invention provide an oil discharge device that is capable of easily discharging and shutting off an oil through a sealing cap which is provided under an oil discharge hole and is rotatably opened and closed by an opening and closing rod that reciprocates horizontally, So that the oil and metal residue remaining on the bottom of the oil tank can be completely discharged.

Also, while the oil is being discharged, the opening / closing rod can be simply rotated from the open position to easily maintain the opening state of the sealing cap, so that another operation can be prepared during the oil drain operation. When the opening / closing rod is rotated again, The sealing cap can be conveniently closed by a member in a one-touch operation.

In addition, the oil falling down in the vertical direction in the oil discharge hole is guided laterally by the guide guiding the oil discharge provided on the support plate, so that the oil can be accurately and safely discharged to the oil sump without worrying about the operator's hand The effect of protecting workers and preventing contamination of the workplace is outstanding.

1 and 2 are longitudinal sectional views for explaining the problems of the oil tank drain apparatus according to the prior art.
3 and 4 are enlarged cross-sectional views illustrating the construction and opening and closing operation of the oil tank drain apparatus according to the first embodiment of the present invention.
5 and 6 are enlarged cross-sectional views showing the construction and opening and closing operation of the oil tank drain apparatus according to the second embodiment of the present invention.
7 and 8 are enlarged cross-sectional views showing the construction and opening and closing operation of the oil tank drain device according to the third embodiment of the present invention.
9 and 10 are views showing the construction and opening and closing operation of the oil tank drain apparatus according to the fourth embodiment of the present invention.

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

It is to be understood that the same is by way of illustration and example only and is not to be taken by way of limitation, the scope of the present invention being indicated by the appended claims rather than by the foregoing description.

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 structure and operation of the contents described may vary depending on the intention or custom of the user or the operator And the definitions of these terms should be based on the contents throughout this specification.

Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

3 and 4 are enlarged cross-sectional views illustrating the construction and opening and closing operation of the oil tank drain apparatus according to the first embodiment of the present invention.

≪ Embodiment 1 >

An oil tank drain device according to the present invention may include a coupling nut 20, a body 30, a sealing cap 40, and a cam portion 60.

The fastening nut 20 is assembled in an airtight structure from the outside of the fastening hole T1 formed in the bottom surface of the oil tank T and has an upper portion protruding at a height corresponding to the thickness of the fastening hole T1, The outer diameter is formed by the fitting portion 21 having a tight tolerance with the fastening hole T1.

The coupling nut 20 is assembled with the coupling hole T 1 of the oil tank T in an airtight structure so that the edge portion where the outer surface of the coupling nut 20 meets the bottom surface of the oil tank T is welded Tight structure in which the oil in the oil tank (T) is not leaked through the connection portion between the oil tank (T) and the fastening nut (20).

A bolt portion 32 formed at the center of the oil discharge hole 31 is formed at the center of the body 30 so as to be screwed with the tightening nut 20. A seal ring It is preferable that the member 33 is fitted and screwed to seal it.

The upper surface of the body 30 may be formed in a plate shape perpendicular to the bolt 32. A hinge portion 34 may be formed on one side of the outlet of the oil discharge hole 31 of the bolt portion 32, Respectively.

Both ends of the body 30 are extended downward at right angles to the upper surface of the body 30 to form a pair of vertical supports 35.

The hinge part (34) is provided with a support plate (41) hinged at one end to open or close the lower side of the oil discharge hole (31).

The support plate 41 may have a disc shape having one end assembled with the hinge portion 34 and the other end having an outer diameter larger than that of the oil discharge hole 31.

The inner surface of the support plate 41 is formed with a sealing cap 40 made of an elastic material such as rubber or silicone having resistance to chemicals and heat.

According to an aspect of the present invention, the sealing cap 40 is integrally formed with the support plate 41 while being injection-molded with the inner surface of the support plate 41, And can be assembled and fixed in a fitting manner.

The upper end of the sealing cap 40 is in the form of a cone having a substantially rounded shape and closely contacted with the chamfered portion 31a formed at the outlet of the oil discharge hole 31. The upper end of the sealing cap 40 is, The oil can be prevented from leaking through the oil discharge hole 31 by tightly fitting the oil discharge hole 31 by the pressing force of the oil discharge hole 31. [

The opening and closing rod 50 may have a substantially circular cross section or a rectangular cross section and may be reciprocally moved left and right in a state of being interposed across the opposed vertical supports 35 of the body 30.

One end of the opening and closing rod 50 is provided with a handle 51 and the other end thereof is formed with a stopper 52 so as not to be detached from the vertical support portion 35.

A cam portion 60 is formed in the middle of the opening and closing rod 50. The cam portion 60 is inserted into the vertical support portion 35 in a state in which the opening and closing rod 50 is positioned below the sealing cap 40, The cam plate 61 is inclined to contact the bottom surface of the support plate 41 so as to press the support plate 41 upward. The cam plate 61 has a substantially conical shape with the opening / closing rod 50 as a central axis.

The cam surface 61 may be formed in a straight shape, a curved shape or a step shape, and the sealing cap 40 may be designed in various shapes according to the required pressure for closing the oil discharge hole 31, Can be formed as a cam surface (61) which can provide a pressing force larger than the pressure inside the tank (T).

Therefore, the support plate 41 is rotated in the vertical direction about the hinge portion 34 according to the position of the cam portion 60, so that the oil discharge hole 31 is formed by the upper end of the sealing cap 40 Closed or open.

According to the present invention, a resilient member 70 is provided on one side of the opening / closing rod 50 so that the cam portion 60 elastically presses the support plate 41 to maintain the closed state of the oil discharge hole 31, May be further included.

The elastic member 70 serves to move the opening and closing rod 50 in one direction so as to maintain the contact between the cam portion 60 and the support plate 41 or restore the contact portion to its original position in a state in which the contact is released.

The resilient member 70 may be configured in the form of a coil spring 71 and positioned between the inner surface of one vertical support portion 35 of the body 30 and the cam portion 60. [

According to this configuration, the coil spring 71 presses the cam portion 60 in the direction opposite to the one vertical support portion 35, so that the load 50 is moved.

The cam surface 61 of the cam portion 60 presses the bottom surface of the support plate 41 upward in correspondence with the elastic force of the coil spring 71 so that the support plate 41 is rotated about the hinge portion 34, And the sealing cap 40 of the support plate 41 closes the oil discharge hole 31. As a result,

The coil spring 71 is configured such that the sealing cap 40 closes the oil discharge hole 31 by the cam surface 61 and then the sealing cap 40 is pushed downward even when the internal pressure of the oil tank T is changed. It is preferable to have an elastic force.

According to another aspect of the present invention, a locking member 80 for interrupting the closed state of the opening and closing rod 50 may further be included.

Referring to FIGS. 3 and 4, the locking member 80 is positioned on the opening / closing rod 50 adjacent to the outer surface of the vertical support portion 35 in the reference that the oil discharge hole 31 is closed by the sealing cap 40 A locking hole 55 may be formed and a locking pin 81 fitted to such a locking hole 55 may be included.

The lock pin 81 is inserted into the lock hole 55 of the opening and closing rod 50 while the sealing cap 40 is closed so that the opening and closing rod 50 is closed by the sealing cap 40 in the oil discharge hole 31, So that unnecessary opening of the sealing cap 40 can be prevented.

≪ Embodiment 2 >

5 and 6, the opening and closing rod 50 is reciprocally supported through a guide hole formed in at least one vertical support portion 35 of the body 30, A resilient member 70 is provided between the vertical support portion 35 and the cam portion 60 so that the cam portion 60 presses the support plate 41 upward to rotate the oil discharge hole 31 can be interrupted.

According to this configuration, the bottom end of the support plate 41 is not brought into contact with the opening / closing rod 50, unlike the first embodiment, when the support plate 41 is rotated downward by the hinge portion 34, The sealing cap 40 can completely open the oil discharge hole 31 to provide an effect that the oil is quickly discharged.

According to the present invention, the engaging groove 53 is protruded from the outer peripheral surface of the handle 51 of the opening / closing rod 50 and the engaging groove 54 for guiding the engaging portion 53 is formed on the inner circumferential surface of the guide hole So that stability and accuracy of reciprocating movement of the opening / closing rod 50 can be improved.

The engaging portion 53 has a length corresponding to a reciprocating distance of the cam portion 60. When the position of the cam portion 60 is a position at which the contact with the supporting plate 41 is released, 53) is drawn out of the engaging groove 54 and then the opening and closing rod 50 is rotated (angle 90 DEG) either side so that the distal end of the engaging part 53 is located outside the vertical supporting part 35 The opening / closing rod 50 is prevented from returning to its original position by being supported on the side surface so that the sealing cap 40 is opened from the oil discharge hole 31 to be stably maintained while the oil is completely discharged.

On the contrary, when the sealing cap 40 is to be closed again, the opening / closing rod 50 is rotated in the opposite direction (angle 90 deg.) So that the engaging portion 53 and the engaging groove 54 are aligned The opening / closing rod 50 is quickly returned to its original position by the resilient force of the elastic member 70, that is, the coil spring 71 that has been compressed.

At this time, the cam portion 60 comes into contact with the bottom surface of the support plate 41 again, and the sealing plate 40 is rotated upward about the hinge portion 34 by the cam surface 61, 31 are pressed while being closed.

This closing operation causes a series of operations in which the opening / closing rod 50 is instantaneously moved by the elastic member 70 when the locking part 53 and the locking groove 54 are brought into alignment by rotating the opening / closing rod 50, .

≪ Third Embodiment >

7 and 8, the opening and closing rod 150 is fastened to at least one or more vertical supporting portions 35 provided on the body 30 in a threaded manner, The cam portion 60 presses the support plate 41 upward while the seal member 40 is moved by the rotation operation so that the oil discharge hole 31 is opened and closed by the sealing cap 40. [

According to such a configuration, since the opening and closing rod 150 is screwed to the vertical supporting portion 35, when the opening and closing rod 150 is rotated in one direction, the opening and closing rod 150 is moved in one direction, The support plate 41 is rotated upward about the hinge portion 34 by moving to the center of the support plate 41 so that the sealing cap 40 closes the oil discharge hole 31. [

When the opening and closing rod 150 is rotated in the opposite direction, the opening and closing rod 150 is moved in the opposite direction. Accordingly, the cam portion 60 is moved toward the hinge portion 34 of the support plate 41, The seal cap 40 is rotated downward about the hinge portion 34 by the self weight and the pressure of the discharged oil so that the oil discharge hole 31 is opened.

In particular, the opening and closing rod 150, which is reciprocally moved in a screwed manner, is provided with an oil discharge hole (not shown) for discharging a large amount of oil (waste oil) instantaneously when the oil discharge hole 31 is opened by rotating the handle 51 31) can be adjusted to effectively prevent the oil from being scattered to the floor of the worker and the workplace.

In addition, the opening and closing rod 150 may be provided with a lock nut 82 for interrupting rotation. The lock nut 82 is brought into close contact with the inner side surface of the vertical support portion 35 while the oil discharge hole 31 is closed by the sealing cap 40, It is possible to prevent the unnecessary rotation and to further strengthen the airtightness of the oil discharge hole 31 and the sealing cap 40. [

On the contrary, when the opening and closing rod 150 needs to be rotated again to open the oil discharge hole 31, the lock nut 82 which is in close contact with the inner side surface of the vertical support portion 35 is rotated to move to the cam portion 60 The opening and closing rod 150 can be rotated and the sealing cap 40 can be moved downward through the movement of the cam portion 60 by the rotation of the opening and closing rod 150 to open the oil discharge hole 31 will be.

According to the present invention, the support plate 41 is provided with guide portions 42 formed on opposite sides of the support plate 41 and opposite to the oil discharge direction so as to prevent the oil from slipping out of the support plate 41 May be included.

According to the configuration of the guide portion 42 for guiding the discharge of oil, the sealing cap 40 is moved from the oil discharge hole 31 to the discharge port 31 at the moment when the operator holds the handle 51 of the opening / When the oil (waste oil) is discharged to the oil discharge hole 31, the oil discharge hole 31 is not moved to the both sides and the rear side of the support plate 41, It can be accurately guided.

Therefore, as in the prior art, oil (waste oil) is dropped at the moment when the oil discharge hole 31 is opened and scattered on the floor of the worker's body and the workplace, thereby solving the problem of safety accidents or contamination of the workplace.

<Fourth Embodiment>

According to the present invention, as shown in FIGS. 9 and 10, a fastening hole (20) formed in the bottom surface of the oil tank (T) is formed without using a fastening nut (20) A pair of brackets 36 protruding vertically downward are provided on both sides opposite to each other with respect to the center of the bracket 36. At this time,

A support plate 41 is provided on the bottom surface of the oil tank T adjacent to the coupling hole T1 to open and close the coupling hole T1 while one side is hinged and rotated up and down.

At this time, it is preferable that a sealing member (not shown in the figure) is provided on the upper surface of the support plate 41 so that airtightness is maintained when the support plate 41 closes the fastening hole T1.

The sealing member may be formed on the surface of the support plate 41 or in the fastening hole T1 or both.

An opening / closing rod 250 is provided below the bottom surface of the oil tank T so as to be bi-directionally moved through the guide hole of the bracket 36 horizontally. On the upper surface of the center portion of the opening / And a cam portion 160 for rotating the support plate 41 in accordance with bi-directional movement of the opening and closing rod 250 to open and close the fastening hole T1.

The elastic member 70 such as the coil spring 71 is provided between the handle 251 of the opening and closing rod 250 and the bracket 36 adjacent to the handle 251 so that the opening and closing rod 250 is moved in both directions The elastic member 70 is compressed or tensioned between the handle 251 and the bracket 36 so that the opening and closing rod 250 is elastically operated.

In addition, an engagement groove (not shown in the figure) is formed on the outer circumferential surface at one side opposed to the handle 251 of the opening / closing rod 250, and a hooking hole 83 such as an E- The elastic member 70 is compressed by the one bracket 36 and the elastic force of the elastic member 70 is released as shown in Figure 9 when the external force of the opening and closing rod 250 is removed, The opening and closing rod 250 is completely separated from the bracket 36 while the latching hole 83 is caught by the bracket 36 in the process of positioning the opening and closing rod 250. [ .

When the opening and closing rod 250 is to be detached from the bracket 36, the detachment can be performed by separating the retaining hole 83 from the retaining groove of the opening and closing rod 250.

9, when the elastic member 70 is not compressed, the cam portion 160 provided on the opening and closing rod 250 pushes up the support plate 41, and the fastening hole T1 is closed by the support plate 41, The resilient member 70 is compressed and the opening and closing rod 250 is compressed when the gripping hole 251 of the opening and closing rod 250 is pushed in the advancing direction as shown in FIG. The support plate 41 is moved downward and the fastening hole T1 is opened while the cam portion 160 of the support plate 41 is disengaged from the support plate 41. [

On the other hand, the opening and closing rod 250 can open and close the support plate 41 from the fastening hole T1 while moving the cam portion 160 in both directions through the horizontal movement as described above. However, The curved portion of the cam portion 160 may be formed in a direction perpendicular to the longitudinal direction of the opening / closing rod 250.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

20: fastening nut 21:
22: welding fixture
30: body 31: oil discharge hole
31a: chamfer 32: bolt
33: sealing member (O-ring) 34: hinge portion
35: vertical support
40: sealing cap 41: support plate
42: guide portion
50, 150: opening / closing rod 51: handle
52: stopper 53:
54: Retaining groove 55: Locking hole
60: cam portion 61: cam face
70: elastic member 71: coil spring
80: locking member 81: locking pin
82: Lock nut
T: Oil tank T1: Tightening hole

Claims (11)

A fastening nut that is assembled in a tight airtight structure from the outside to a fastening hole formed in a bottom surface of an oil tank;
A body fastened to the fastening nut by a sealing structure and having a bolt portion formed with an oil discharge hole;
A sealing cap of an elastic material provided on an inner surface of a support plate hinged to the body to open and close the oil discharge hole and rotated up and down; And
An opening / closing rod disposed at a lower portion of the sealing cap and having a cam portion coupled to the body for reciprocating movement of the support plate to intermittently open / close the oil discharge hole by the sealing cap;
Wherein the oil tank drain device comprises: The method according to claim 1,
Wherein the elastic member is further provided at one side of the opening / closing rod so as to elastically press the support plate to maintain the closed state of the oil discharge hole. 3. The method of claim 2,
Wherein the opening and closing rod is reciprocally supported by guide holes formed in at least one vertical support portion provided on one or both sides of the body and the elastic member is provided on the outer circumferential surface of the opening and closing rod positioned between the vertical support portion and the cam portion And the oil tank drainage device. The method of claim 3,
Wherein the engaging portion is formed on the outer surface of the opening and closing rod so as to guide the engaging portion on the inner circumferential surface of the guide hole and the engaging portion has a length corresponding to the reciprocating distance of the cam portion, When the opening / closing rod is rotated to one side in a state in which the end portion of the engaging portion is drawn out from the engaging groove, the engaging portion is supported on the outer side of the vertical supporting portion, And an open state of the oil discharge hole is maintained. The method according to claim 1,
Wherein the opening and closing rod is configured to open and close the oil discharge hole by the sealing cap by operating the support plate through the cam portion while reciprocally moving with at least one vertical support portion provided on the body, Oil tank drain device. 6. The method of claim 5,
Wherein the opening / closing rod further includes a lock nut for preventing rotation. The method according to claim 1,
Wherein the sealing cap is made of an elastic material such as synthetic rubber or silicone having resistance to chemicals, heat resistance, and hardenability in accordance with oil characteristics. The method according to claim 1,
The sealing cap may be integrally formed with the support plate by injection molding with an inner surface of the support plate, and the seal cap may be formed separately and assembled and fixed to the inner surface of the support plate in a fitting manner,
The upper end of the sealing cap is formed in a conical shape having a smaller outer diameter toward the end so that the upper end of the sealing cap is kept in close contact with the chamfered portion formed at the outlet of the oil discharge hole, And the oil tank drain device is fitted into the oil tank drain device. 3. The method of claim 2,
Wherein the opening and closing rod is further provided with a lock member for preventing movement of the oil tank. 10. The method according to any one of claims 1 to 9,
Wherein the guide plate is further provided on the inner surface of the support plate so that oil discharged from the oil discharge hole is not discharged to both sides and rear of the support plate. A bracket that is formed to protrude downward on opposite sides of a fastening hole formed on a bottom surface of an oil tank;
A support plate rotatably installed on one side of the coupling hole through which oil is discharged from the bottom surface of the oil tank to open and close the coupling hole;
An opening / closing rod disposed on the bottom surface of the oil tank and spaced downward from the bottom surface of the oil tank, reciprocally moved in a state of being inserted through the bracket, and having a cam for rotating the support plate to open /
An elastic member provided between the handle of the opening and closing rod and the bracket adjacent thereto to provide an elastic force to the reciprocating movement of the opening and closing rod; And
And a stopper for controlling the movement of the opening / closing rod while being attached / detached to / from an engagement groove formed on one outer peripheral surface of the opening / closing rod.

Images