KR200485546Y1 - Fuel cap for agriculture vehicle - Google Patents

Abstract

A fuel cap for opening and closing a fuel tank inlet of an agricultural machine is disclosed. The fuel cap according to the present invention comprises a cover and a fastening body, a valve unit accommodated in the fastening body, and a packing member provided between the cover and the fastening body, wherein the fastening body is partially received A stepped portion formed stepwise on the outer surface of the fastening body at a portion accommodated in the cover, and the packing member is seated on the stepped portion by the stepped portion, so that the air flow between the fastening ring and the fastening body And a plurality of grooves for forming a vent hole through which external air can be introduced into the air flow passage are formed at the edge of the packing member at a portion contacting the opening of the passage.

Description

Fuel cap for agriculture vehicle

The present invention relates to a fuel cap, and more particularly, to a fuel cap for an agricultural work vehicle that opens and closes an inlet of an agricultural work vehicle fuel tank such as a tractor or a combine.

The interior of the fuel tank storing the fuel is not always full of fuel. Therefore, the upper part of the fuel tank is generally filled with air. Therefore, the air pressure inside the fuel tank changes due to a change in the external environment, for example, a change in temperature, or fuel flow in the fuel tank due to vehicle start-up, or consumption of fuel.

For example, when the ambient temperature is increased, the volume of the fuel expands to increase the air pressure inside the fuel tank. On the contrary, when the ambient temperature decreases, the internal pressure decreases as the volume of the fuel decreases. Similarly, even when the fuel is consumed, the air pressure inside the fuel tank is lowered by the fuel reduction in the tank due to the fuel consumption.

If the air pressure inside the fuel tank, which constantly varies as described above, is not regulated within a certain range within a proper range due to external environment, fluctuation due to fluctuation, fuel consumption, etc., fuel is not supplied smoothly and there is a risk of explosion due to pressure increase . Therefore, an air breather is mounted for proper internal pressure adjustment inside the fuel tank.

The air breather adjusts the air pressure inside the fuel tank. When the pressure inside the fuel tank (air pressure) is too high, the air containing the air inside the fuel tank is discharged to the outside to lower the pressure inside the fuel tank. The pressure inside the fuel tank is adjusted by allowing the outside air to flow into the fuel tank.

The air breather is typically applied in the form of being mounted directly on top of the fuel tank or attached to a breather pipe connected to the fuel tank. Therefore, the conventional fuel tank has to be provided with a part for installing the air breather, which complicates the structure and requires a lot of manufacturing cost.

There is also a way to control the air pressure inside the fuel tank by making a hole in the cap of the fuel injection hole and allowing the air to flow through the hole. However, in this case, since foreign matter such as dust can be introduced into the fuel tank through the hole, the fuel may be contaminated, which may result in deterioration of engine performance.

Techniques for solving the conventional problems by incorporating the air breather function into the fuel cap have also been proposed in various forms. For example, Korean Patent Laid-Open Publication Nos. 2005-0107657 and 2010-0073641 disclose a method of integrating a bidirectional valve in which air is introduced into a fuel tank side or gas is flowed out of a fuel tank into a cover constituting a fuel cap Configuration is shown.

However, in the configuration disclosed in the fuel cap of the prior art, there is a problem that the foreign matter flows freely through the passage provided to allow the outside air to flow in and out of the valve inside the cover, thereby adversely affecting the operation characteristics of the valve. There is a problem that the fuel is introduced between the valve body and the valve-mounted body to increase the release torque of the fuel cap.

Especially, in the case of an agricultural work vehicle, which is operated in a very poor environment due to the characteristics of a vehicle, unlike a general vehicle which is operated in a good road environment, it is an environment in which many foreign substances are inevitably exposed due to exposure to more foreign substances. The solution is urgent.

Korean Patent Publication No. 2005-0107675 (published November 15, 2005) Korean Patent Laid-Open Publication No. 2010-0073641 (published on July 07, 2010)

It is an object of the present invention to provide a fuel cap for an agricultural work vehicle having a structure capable of smoothly introducing or discharging external air or internal gas for pressure control while minimizing inflow of foreign matter into the fuel cap by improving airtightness will be.

The present invention provides a fuel cap for an agricultural machine, comprising a cover and a fastening body, a valve unit accommodated in the fastening body, and a packing member provided between the cover and the fastening body, A stepped portion formed stepwise on the outer surface of the fastening body at a portion accommodated in the cover, a stepped portion formed by the stepped portion, the packing member being seated on the stepped portion, Wherein a plurality of recesses are formed in the edge of the packing member at a portion contacting the fixing ring so as to form an air hole communicating with the air flow passage. do.

Here, the cover may be a cylindrical structure in which a handle for user grip is integrally attached to the upper surface, a plurality of protrusions or grooves for preventing slippage are formed in the circumferential direction, and a lower portion is opened.

In addition, the fastening body may be configured such that a threaded portion for screwing the fuel injection port with the fuel injection port is formed on the outer surface remote from the portion accommodated in the cover, and the valve unit mounting portion in which the hole is formed at the center surrounds the cylindrical side wall portion have.

In addition, the end of the fastening body received in the cover is integrally formed with an elastic flange restrained by a retaining ring on the inside of the cover, and is partly cut along the joint between the step end and the elastic flange, An incision part for allowing air to flow is formed in the inner space defined by the body.

A ratchet is provided on one surface of the cover to which the elastic flange abuts and a ratchet jaw is formed at a predetermined interval along the circumferential direction to prevent the fuel cap from being tightened. A projection may be formed.

At this time, when an excessive physical force is applied to the side of the ratchet protrusion in the direction of tightening the fuel cap to the fuel injection port, the ratchet protrusion rides over the ratchet jaw only in the direction in which the fuel cap is fastened, An inclined surface may be formed so as to be induced.

The packing member applied to the present embodiment may be constituted by an annular sealing upper portion, a sealing lower portion, and a vertical connecting portion contacting the fastening body and connecting the sealing upper portion and the inner end portion of the sealing lower portion to each other.

At this time, the upper part of the ceiling may be formed to have a larger diameter than the lower part of the ceiling, and a groove may be formed at the edge of the upper part of the ceiling which protrudes more radially than the lower end of the ceiling.

The sealing lower portion may be located on the outer side of the cover, and the sealing upper portion may be located on the inner side of the cover such that the edge portions of the wings are in contact with the fixing ring.

Preferably, the lower surface of the ceiling and the cover end of the lower surface of the cover are disposed on the same plane.

According to the fuel cap for agricultural use work according to the present invention, the packing member is applied in a form covering the air flow space between the cover and the fastening body, so that the airtightness between the cover and fastening body can be increased, It is possible to eliminate the problem that the foreign matter flows into the fuel cap through the passage between the fixing ring and the fastening body, which affects the operation characteristics of the valve and the release torque of the fuel cap.

In addition, since the packing member covers the air flow passage to ensure airtightness, a groove is formed at the edge of the packing member to form a vent hole communicating with the air flow passage, thereby minimizing the inflow of foreign matter into the fuel cap, Can smoothly flow into the fuel tank or can be smoothly discharged from the fuel tank, so that the pressure of the fuel tank can be appropriately maintained.

1 is an exploded perspective view of a fuel cap for an agricultural machine according to an embodiment of the present invention;
FIG. 2 is a perspective view of a fuel cap for an agricultural machine according to an embodiment of the present invention; FIG.
3 is a cross-sectional view of the fuel cap of FIG. 2 taken along line AA;
4 is a perspective view of the cover constituting the fuel cap viewed from the bottom;
5 is a perspective view of a fastening body constituting a fuel cap;
6 is an enlarged view of the ratchet projection of the fastening body shown in Fig. 5; Fig.
7 is a perspective view of a packing member constituting a fuel cap;
8 is an enlarged view of a portion 'B' in FIG. 3;
9 and 10 are views showing an operating state of the fuel cap according to the embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the present invention, a detailed description of known configurations will be omitted, and a detailed description of configurations that may unnecessarily obscure the gist of the present invention will be omitted.

FIG. 1 is an exploded perspective view of a fuel cap for an agricultural machine according to an embodiment of the present invention, and FIG. 2 is an assembled perspective view of a fuel cap for an agricultural machine according to an embodiment of the present invention. And Fig. 3 is a cross-sectional view of the fuel cap of Fig. 2 taken along line A-A. The overall structure of the fuel cap for agricultural use work according to the embodiment of the present invention will be described with reference to these drawings.

Referring to Figs. 1 to 3, the fuel cap according to the embodiment of the present invention has a cover 1 with a handle 10. Fig. And a fastening body 2 fixed to the cover 1 so as to be partially received therein. The fastening body 2 is fixed in such a manner that a part of the fastening body 2 is accommodated in the cover 1 through a fastening ring 3 which is coupled to the inner side wall of the cover 1 and the fastening body 2 is provided with a valve unit 5, .

The cover 1 has a ratchet structure composed of a ratchet jaw 19 and a ratchet projection 29 which will be described later with respect to the fastening body 2 and a direction in which the fuel cap is fastened to the fuel injection port, Direction, and at the same time, when the excessive physical force is applied in the direction of tightening the fuel cap to the fuel injection port, the fuel cap is structured so as to be staggered.

The valve unit 5 accommodated in the fastening body 2 is a well-known valve that opens and closes in both directions so that outside air flows into the fuel tank side or gas generated in the fuel tank can escape to the outside of the fuel tank. Between the stationary ring 3 and the fastening body 2 is formed an air flow passage 7 through which the air or gas flows for maintaining air pressure inside the fuel tank.

A stepped step 20 is formed stepwise on the outer surface of the fastening body 2 at a portion accommodated in the cover 1. [ The packing member 4 is mounted on the step 21 by the stepped portion 20 so as to cover the opening of the air flow passage 7 and at the same time, A plurality of grooves 402 are formed at the edge of the air flow passage 4 to form a vent hole 6 communicating with the air flow passage 7.

Accordingly, the airtightness of the space between the fixing ring 3 coupled to the cover 1 and the fastening body 2 (the air flow passage 7) is secured, and foreign matter penetration into the fuel cap through the space is minimized External air or internal gas can smoothly flow into the fuel tank or can be smoothly discharged from the fuel tank through the vent hole 6 by the groove 402.

4 is a perspective view of the cover constituting the fuel cap viewed from the bottom.

Referring to Fig. 4, the cover 1 has a cylindrical shape with its bottom opened. On the upper surface of the cover 1, a handle 10 for user gripping is integrally attached to the fuel cap when the fuel cap is opened and closed. On the side surface of the cover 1, Or a plurality of grooves 12 are formed in the circumferential direction.

A plurality of ratchet jaws 19 are protruded in a circumferential direction at predetermined intervals on one surface of the cover 1 facing the upper end of the fastening body 2. The locking ring 3 engages with the side recess 30 of the retaining ring 3 so that the retaining ring 3 which generates the restraining force of the fastening body 2 with respect to the cover 1 is not released from the cover 1, (15) are formed in the circumferential direction on the inner circumferential surface of the side wall of the cover (1).

The cover 1 may be made of metal or nonmetal, for example, synthetic plastic material through injection molding. In addition, the present invention is not limited to the illustrated embodiment, because various modifications may be made depending on the shape and size of the fuel injection port to be applied. Of course, the handle 10 attached to the cover 1 may also be modified in various ways according to the convenience of the user, so that the present invention is not limited thereto.

5 is a perspective view of a fastening body constituting the fuel cap.

On the outer surface of the fastening body 2 separated from the portion accommodated in the cover 1, as shown in Fig. 5, a screw hole 23 for threading the fuel injection port is formed. A valve unit mounting portion 25 having a hole 26 formed therein is integrally formed at the center thereof and a cylindrical side wall portion formed with the thread 23 surrounds the valve unit 5.

An elastic flange 27 is integrally formed at the end of the fastening body 2 accommodated in the cover 1 and is constrained by the fixing ring 3 inside the cover 1. The inner space defined by the air flow path 7 and the cover 1 and the fastening body 2 is partially cut along the joint between the end of the stepped portion 20 and the elastic flange 27, A cut-out portion 28 is formed.

A ratchet protrusion 29 is formed on one surface of the elastic flange 27 in contact with the cover 1. The ratchet protrusion 29 is positioned between the ratchet tips 19. The ratchet protrusion 29 has a fuel cap, The ratchet projection 29 rides over the ratchet jaws 19 only in the fuel cap engaging direction when the excessive physical force is applied to the engaging body 2 in the direction in which the cover 1 is engaged with the engaging body 2, The inclined surface 290 is formed as shown in FIG.

Accordingly, the cover 1 is spaced apart from the fastening body 2 within a predetermined angular range (distance between the ratchet jaws 19) in the direction opposite to the direction of fastening the fuel cap to the fuel injection port, When a continuous force is applied to the fuel injection port in the fastening direction in the fully fastened state, the fastening body 2 remains and only the cover 1 is rotated to prevent the fastening.

That is, by engaging the cover 1 and the clamping body 2 with a predetermined clearance in the circumferential direction, even if the vehicle vibration is transmitted to the fuel cap, the cover 1 against the clamping body 2 within the clearance range The fuel cap is not loosened by the free rotation. Even if the physical force is continuously applied in the state where the fuel cap is completely fastened, the cover 1 is loosened and the fastening is prevented.

7 is a perspective view of a packing member constituting the fuel cap.

7, the packing member 4 applied to the present invention is in contact with the annular sealing upper portion 40, the sealing lower portion 42 and the fastening body 2, and the sealing upper portion 40 and the sealing lower portion 42 And a vertically connecting portion 44 connecting inner ends of the sealing portion 40. The diameter of the sealing upper portion 40 is larger than the sealing lower portion 42 and the wings of the sealing portion 40 protruding more radially than the end of the sealing lower portion 42 The groove 402 is formed at the edge of the fixing ring 3 to form the vent hole 6 with the fixing ring 3.

8, the sealing lower portion 42 is located outside the cover 1 and is tightly brought into close contact with the inner peripheral surface of the opening of the fuel inlet when the fuel cap is fastened to increase the airtightness to the gap between the fuel cap and the fuel inlet The ceiling upper portion 40 covers the opening of the air flow passage 7 by positioning the edge portion of the wing portion 400 in contact with the stationary ring 3 from the inside of the cover 1. [

At this time, it is preferable that the lower end of the sealing upper part 40 and the end part of the cover 1 on the lower surface of the cover 1 are located at a height that can be arranged on the same plane, and the size and number of the recesses 402 The present invention is not limited to the specific size and number of fuel injectors, and may vary depending on the shape of the fuel cap and the shape of the fuel cap.

The operation and effect of the fuel cap according to the embodiment of the present invention configured as described above will be described with reference to FIGS. 9 and 10. FIG.

A fuel cap 9 according to the embodiment of the present invention is connected to the inlet of the fuel injection port 9 by a screw fastening method to block the inlet, and in this state, When the pressure in the fuel tank changes due to the volume change of the fuel or the consumption of fuel due to the fuel cap, the function of the air breather is exerted by the fuel cap according to the embodiment of the present invention.

For example, when the fuel is consumed and the air pressure inside the fuel tank is lowered by the fuel reduction in the tank due to the fuel consumption, the valve unit 5 is opened in the direction in which the outside air is drawn, The fuel tank flows into the fuel tank naturally via the inside of the fuel cap, so that the fuel tank maintains a proper pressure.

Specifically, when the valve unit 5 is opened in the direction in which external air is introduced, the pressure difference causes the external air to flow through the groove 402 of the packing member 4 and the fixing ring Flows into the air flow passage 7 through the vent hole 6 partitioned by the partition member 3 and flows naturally into the fuel tank via the cutout portion 28 and the inner space 8 and the valve unit 5, The internal pressure of the tank is lowered.

On the contrary, when the pressure in the fuel tank increases due to the generation of gas and becomes higher than the set pressure of the valve unit 5, the valve unit 5 is opened in the direction of exhausting the gas, The gas is naturally discharged to the outside of the fuel tank via the inside of the fuel cap as shown by an arrow in Fig. 10, so that the fuel tank maintains a proper pressure.

As described above, the sealing member 4 is applied so as to cover the air flow space between the cover 1 and the fastening body 2, thereby increasing the airtightness between the cover 1 and the fastening body 2 So that foreign substances are introduced into the fuel cap through the passage 7 between the fixing ring 3 and the fastening body 2 which are coupled to the cover 1 and the operating characteristics of the valve and the release torque of the fuel cap Can be solved.

In addition, since the packing member 4 covers the air flow passage 7 to ensure airtightness, a groove 402 is formed at the edge of the packing member 4 to form a vent hole 6 communicating with the air flow passage, External air or internal gas can smoothly flow into the fuel tank or can be smoothly discharged from the fuel tank while minimizing the inflow of foreign matter into the cap, thereby properly maintaining the pressure of the fuel tank.

The above detailed description of the present invention only describes specific embodiments thereof. It is to be understood, however, that the appended claims are not to be interpreted as limited to the specific forms set forth in the detailed description, but rather are to include all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. .

1: cover 2: fastening body
3: Retaining ring 4: Packing member
5: valve unit 6: vent hole
7: air flow passage 8: inner space
10: handle 12: groove
15: latching jaw 19: ratchet jaw
20: step 21: step
22: side wall portion 23:
25: valve unit mounting portion 26: hole
27: Elastic flange 28:
29: ratchet projection 35: side recess
40: sealing upper part 42: sealing lower part
44: vertical connection portion 290: inclined surface
400: wing portion 402: groove

Claims (10)

And a packing member 4 provided between the cover 1 and the fastening body 2 and a valve unit 5 accommodated in the fastening body 2, In the cap,
The fastening body 2 is fixed in such a manner that a part of the fastening body 2 is received in the cover 1 via the fastening ring 3 and is fastened to the outer surface of the fastening body 2, And the packing member 4 is mounted on the step 21 by the stepped portion 20 so that the air flow path 7 between the stationary ring 3 and the fastening body 2 ),
Wherein a plurality of recesses (402) are formed in the edge of the packing member (4) at a portion contacting the stationary ring (3) to form a vent hole (6) communicating with the air flow passage (7).
The method according to claim 1,
The cover 1 has a cylindrical structure in which a handle 10 for user grip is integrally mounted on the upper surface and a plurality of protrusions or recesses 12 for preventing slippage are formed in the circumferential direction and the lower portion is opened Features a fuel cap for agricultural work.
The method according to claim 1,
The fastening body 2 has a fuel injection port and a screw thread 23 for fastening the screw to the outer surface spaced apart from the portion accommodated in the cover 1 and a valve unit mounting portion 25 having a hole at the center is inserted into the threaded portion 23. The fuel cap for an agricultural machine as claimed in claim 1,
The method according to claim 1,
An elastic flange 27 is integrally formed at an end of the fastening body 2 received in the cover 1 and is constrained by the fastening ring 3 inside the cover 1,
An inner space 8 which is partially cut along the joint between the end of the step 20 and the elastic flange 27 and is partitioned by the air flow passage 7 and the cover 1 and the fastening body 2 Wherein an incision (28) is formed in which air can flow.
5. The method of claim 4,
On one side of the cover 1 to which the elastic flange 27 abuts, a ratchet jaw 19 is formed at regular intervals along the circumferential direction to prevent over-tightening of the fuel cap,
Wherein a ratchet projection (29) is formed on one surface of the elastic flange (27) that contacts the ratchet jaw (19) and is positioned between the ratchet jaws (19).
6. The method of claim 5,
The ratchet projection 29 rides over the ratchet jaw 19 only in the direction in which the fuel cap is fastened when excessive physical force is applied to the side surface of the ratchet projection 29 in the direction of fastening the fuel cap to the fuel injection port, Wherein an inclined surface (290) is formed between the body (1) and the fastening body (2) so as to induce idle rotation.
The method according to claim 1,
The packing member 4 includes an annular sealing upper portion 40 and a sealing lower portion 42. The vertical connecting portion 44 contacts the annular sealing upper portion 40 and the sealing lower portion 42 and connects the inner end portions of the sealing upper portion 40 and the sealing lower portion 42 to each other. And a fuel tank for supplying fuel to the fuel tank.
8. The method of claim 7,
The fixing ring 3 is formed at the edge of the wing portion 400 of the sealing upper portion 40 which is formed to have a larger diameter than the sealing lower portion 42 and which is more radially projected than the end of the lower sealing portion 42. [ And a groove (402) for forming a vent hole (6) is formed between the fuel tank and the fuel tank.
9. The method of claim 8,
The sealing lower portion 42 is located outside the cover 1 and the sealing upper portion 40 is located inside the cover 1 such that the peripheral edge of the wing portion 400 abuts the stationary ring 3. [ Fuel cap for agricultural work.
9. The method of claim 8,
Wherein the lower end of the sealing upper portion (40) and the cover end portion of the lower surface of the cover (1) are disposed on the same plane.

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