JP3815071B2 - Ventilator air vent device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a vaporizer that controls the concentration and amount of an air-fuel mixture supplied to an engine, and more particularly to an air vent device that communicates an upper liquid level chamber in a float chamber and the atmosphere.
[0002]
[Prior art]
The air vent hole that connects the upper liquid level chamber in the float chamber and the atmosphere is connected to a lead pipe such as a vinyl pipe or a rubber pipe at the opening on the atmosphere side, and the pipe is connected to the vaporizer body. Air vent pipe is provided.
This routing pipe is connected to the air vent pipe because the opening of the air vent hole is separated from the place where mud, water, etc. scatters when mounted on the engine, or pressure is applied to the opening during traveling. This is done to avoid it.
Conventionally, in order to provide an air vent pipe in the carburetor body, the air vent pipe is press-fitted into the carburetor body and fixed, or a stay plate is placed opposite the air vent pipe and the stay plate is fixed to the carburetor body with screws. Is used.
[0003]
[Problems to be solved by the invention]
The first conventional method has the following problems.
(1) When press-fitting the air vent pipe into the air vent hole for drilling in the main body of the vaporizer, chips are generated. Confirm that the process for completely removing the chips and the chips have been removed. Therefore, it is difficult to reduce the manufacturing cost.
(2) The press-fit load of the air vent pipe needs to be managed accurately. For this purpose, the hole diameter of the air vent hole and the outer diameter of the air vent pipe need to be formed accurately, and it is difficult to reduce the manufacturing cost. is there.
(3) At the time of maintenance of the carburetor, it is impossible to remove the air vent pipe from the carburetor body, and improvement in maintenance workability cannot be expected.
Further, according to the second conventional method, a stay plate and screws are required, and the number of parts is increased. Further, in order to screw the screws, it is necessary to process a screw hole in the carburetor body, which reduces the manufacturing cost. Reduction cannot be achieved.
This is a big problem especially when air vent pipes are arranged on both sides of the intake passage.
[0004]
The present invention has been made in view of the above problems, and an object of the present invention is to provide an air vent device that has a small number of parts, is easy to assemble, and is inexpensive, and that has excellent maintainability.
[0005]
[Means for achieving the object]
In order to achieve the above object, an air vent device for a vaporizer according to the present invention is provided.
Facing both end portions of the intake passage that penetrates the carburetor body, air vent insertion holes are opened and drilled,
A carburetor in which an air vent pipe having an insertion tube portion inserted and disposed in the air vent insertion hole and an annular groove formed in a tube portion outside the insertion tube portion is inserted and disposed in the air vent insertion hole. In the air vent device of
The clip member made of a spring material has a radius R, a fitting semicircular arm portion opening from the center A toward one side X, and the fitting semicircular arm from the other end of the fitting semicircular arm portion. A locking arm portion formed by bending to the side away from the portion, and a first fitting portion comprising;
A fitting semicircular arm portion having a radius R and opening toward one side from the center A; and bending from the other end of the fitting semicircular arm portion to a side away from the fitting semicircular arm portion. A locking arm portion formed; a second fitting portion formed; one end of a fitting semicircular arm portion of the first fitting portion; and one end of a fitting semicircular arm portion of the second fitting portion;
A linear connecting portion that communicates with each other;
And the distance L1 between the opposing surfaces of the inner side surfaces of the respective locking arm portions is set to be smaller than the distance L2 between the first side surface portion and the second side surface portion of the vaporizer body, and each fitting portion of each clip member is fitted. After the mating semicircular portion is fitted and disposed in the annular groove of each air vent pipe, the clip member is rotated along the annular groove to thereby adjust the inner side surface of each locking arm portion to the first side surface portion of the vaporizer body 1. The second side surface portion is elastically pressed and held.
[0006]
[Action]
The insertion tube portion of the air vent pipe is disposed in the air vent insertion hole, and the annular groove is disposed on the outer side of the air vent insertion hole.
Each fitting semicircle portion of the clip member is fitted and disposed in an annular groove of each air vent pipe, and in this state, the clip member is rotated along the annular groove.
By the rotation of the clip member, the inner surface of each locking arm portion is elastically pressed against both end portions of the vaporizer body, whereby the clip member is held by the vaporizer body.
[0007]
【Example】
Hereinafter, an embodiment of an air vent device for a vaporizer according to the present invention will be described with reference to the drawings. FIG. 1 is a front view of a vaporizer including an air vent device.
FIG. 2 is a right side view including a cross-sectional view taken along the line P-P in FIG. 1.
FIG. 3 is a front view including left and right side views of the clip member.
Reference numeral 1 denotes a carburetor body through which an intake passage 2 passes, and a float chamber 4 is formed by a lower recess of the carburetor body 1 and a float chamber body 3.
A constant fuel level is formed in the float chamber 4 by a constant level control mechanism comprising a float, a float valve and a valve seat (not shown).
An air vent boss 1A is formed in the carburetor main body 1 in a horizontal direction toward both sides of the intake passage 2, and air vent insertion holes 1D are formed through both end portions 1B and 1C of the air vent boss 1A. The
[0008]
5 is an air vent pipe, an insertion cylinder part 5A inserted and arranged in the air vent insertion hole 1D, a cylinder part 5B facing outward from the insertion cylinder part 5A, an annular groove 5C formed in the cylinder part 5B, And a pipe portion 5D.
[0009]
A clip member 6 made of a spring wire material is shown in FIG.
6A is a first fitting portion, which has a radius R and is fitted from the fitting semicircular arm portion 6B that opens from the center A toward one side X, and the other end 6C of the fitting semicircular arm portion 6B. It is formed by a locking arm portion 6D formed by bending to the side away from the fitting semicircular arm portion 6B.
Reference numeral 6E denotes a second fitting portion, which has a radius R, a fitting semicircular arm portion 6B that opens from the center A toward one side X, and the other end 6C of the fitting semicircular arm portion 6B. And a locking arm portion 6D formed by bending to the side away from the fitting semicircular arm portion 6B. Then, one end 6F of the fitting semicircular arm portion 6B of the first fitting portion 6A and one end 6F of the fitting semicircular arm portion 6B of the second fitting portion 6E are connected by a linear connecting portion 6G. The
[0010]
The distance L1 between the opposing surfaces of the inner side surface 6H of the locking arm portion 6D of the first fitting portion 6A and the inner side surface 6H of the locking arm portion 6D of the second fitting portion 6E in the clip member 6 is: The distance is smaller than the distance L2 between the first side surface portion 1F and the second side surface portion 1G formed on the side portion of the vaporizer main body 1.
The pitch distance L3 between the first fitting portion 6A and the second fitting portion 6E is the pitch distance L4 between the fitting grooves 5C and 5C when the air vent pipes 5 are inserted and arranged in the air vent insertion holes 1D. And approximately the same.
The first side surface portion 1F is well illustrated in FIG.
[0011]
Next, assembly of the air vent device will be described.
The insertion tube portion 5A of each air vent pipe 5 is inserted and arranged in the air vent insertion hole 1D of the air vent boss 1A. At this time, the cylindrical portion 5B including the annular groove 5C is disposed on the outer side from both side end portions 1B and 1C of the air vent boss 1A.
[0012]
Next, the clip member 6 is disposed toward the annular groove 5C of each air vent pipe 5 and the vaporizer body 1, which will be described with reference to FIGS.
FIG. 5 shows the initial arrangement state of the clip member 6, and FIG. 6 shows the arrangement completion state of the clip member 6.
The initial arrangement state of FIG. 4 will be described.
The opening portion of the fitting semicircular arm portion 6B of the first fitting portion 6A is fitted and arranged in the annular groove 5C of the air vent pipe 5 from the upper left to the oblique lower side in FIG.
On the other hand, the opening portion of the fitting semicircular arm portion 6B of the second fitting portion 6E is also fitted and disposed in the annular groove 5C of the air vent pipe 5.
[0013]
Then, the clip member 6 in the above state is rotated about 90 degrees clockwise in FIG. 4, and the fitting semicircular arm portion 6B of the clip member 6 rotates clockwise in the annular groove 5C, while the locking arm The inner side surface 6H of the portion 6D rotates while elastically pressing the first side surface portion 1F.
This vaporizes the distance L1 between the opposing surfaces of the inner side surface 6H of the locking arm portion 6D of the first fitting portion 6A and the inner side surface 6H of the locking arm portion 6D of the second fitting portion 6E in the clip member 6. This is because the distance is smaller than the distance L2 between the first side surface portion 1F and the second side surface portion 1G formed on the side portion of the vessel body 1.
[0014]
According to the above, the air vent pipe 5 inserted into one end of the air vent insertion hole 1D of the air vent boss 1A and the air vent pipe 5 inserted into the other end of the air vent insertion hole 1D are securely fixed to the vaporizer body 1 by the following. Is done.
First, in FIG. 1, the fact that both the air vent pipes 5 and 5 are disengaged outward means that the fitting semicircular arm portions 6B formed at both ends of the connecting portion 6G are the annular grooves 5C and 5C of the air vent pipes 5 and 5, respectively. 5C and the pitch distance L3 between the first fitting portion 6A and the second fitting portion 6E between the annular grooves 5C and 5C when the air vent pipes 5 are inserted and arranged in the air vent insertion holes 1D. This is prevented by making the pitch distance L4 substantially the same.
In addition, after the clip member 6 is completely disposed, the clip member is prevented from rotating due to vibration or the like, and the inner side surface 6H of the locking arm portion 6D of the first fitting portion 6A of the clip member 6 The distance L1 between the opposing surfaces of the locking arm portion 6D of the second fitting portion 6E and the inner side surface 6H is the distance between the first side surface portion 1F and the second side surface portion 1G formed on the side portion of the vaporizer body 1. This is achieved by making it smaller than L2.
[0015]
【The invention's effect】
As described above, the carburetor air vent device according to the present invention has the following effects.
(1) A part as a fixing means for fixing the air vent pipe to the carburetor body can be provided with a clip member, so that the number of parts can be reduced, and as a fixing method, the clip member is attached to the annular groove of the air vent pipe. What is necessary is just to rotate after fitting inside.
From the above, the number of parts and the number of assembly steps can be reduced, and the manufacturing cost can be reduced.
(2) In the assembling operation, no press-fitting means is used, and no chips are generated. Accordingly, the removal of chips and the confirmation of the removal are not required at all, and a stable improvement in quality and a reduction in manufacturing costs can be achieved.
(3) At the time of maintenance work of the air vent pipe, the air vent pipe can be removed from the carburetor body by simply rotating the clip member counterclockwise and releasing the fitting of the air vent pipe by the clip member. Maintenance work of the air vent pipe can be easily performed.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an essential part of an air vent device for a vaporizer according to the present invention.
2 is a side view including a vertical cross-sectional view of a main part taken along a line PP in FIG. 1;
FIG. 3 is a front view including left and right side views of a clip member.
FIG. 4 is a mounting diagram of a clip member in an initial state of fitting into an air vent pipe.
FIG. 5 is a mounting view of the clip member in a state where the fitting of the clip member to the air vent pipe is completed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vaporizer main body 1D Air vent insertion hole 5 Air vent pipe 5C Annular groove 6 Clip member 6A 1st fitting part 6B Fitting semicircle arm part 6D Locking arm part 6E Second fitting part 6H Inner side surface of locking arm part

Claims (1)

The air vent insertion hole 1D is opened to face both end portions 1B and 1C of the intake passage that penetrates the carburetor body 1,
The air vent insertion hole 5A includes an insertion cylinder portion 5A inserted and disposed in the air vent insertion hole 1D and an annular groove 5C formed in the cylinder portion 5B outside the insertion cylinder portion 5A. In the air vent device of the vaporizer in which 5 is inserted and arranged,
The clip member 6 made of a spring material has a radius R, the fitting semicircular arm portion 6B opening from the center A toward the one side X, and the other end 6C of the fitting semicircular arm portion 6B. A locking arm portion 6D formed by bending to the side away from the combined semi-circular arm portion, and a first fitting portion 6A comprising:
A fitting semicircular arm portion 6B having a radius R and opening from the center A toward one side X, and a side away from the fitting semicircular arm portion from the other end 6C of the fitting semicircular arm portion 6B. A locking arm portion 6D formed by bending, a second fitting portion 6E made of the first fitting portion, an end 6F of the fitting semicircular arm portion 6B of the first fitting portion, and a fitting of the second fitting portion 6E A linear connecting portion 6G that communicates with one end 6F of the combined semicircular arm portion 6B;
The distance L1 between the opposing surfaces of the inner side surfaces 6H, 6H of the respective locking arm portions 6D, 6D is smaller than the distance L2 between the first side surface portion 1F and the second side surface portion 1G of the vaporizer body 1, After the fitting semicircular portions 6B and 6B of the fitting portions 6A and 6E of the member 6 are fitted and arranged in the annular grooves 5C and 5C of the air vent pipes 5 and 5, the clip member 6 is attached to the annular grooves 5C and 5C. The inner side surfaces 6H and 6H of the locking arm portions 6D and 6D are elastically pressed and held by the first side surface portion 1F and the second side surface portion 1G of the vaporizer body 1 by rotating along 5C. Ventilator air vent device.

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