JP7205441B2 - oil filler cap - Google Patents

Description

The present invention relates to an oil filler cap.

Japanese Unexamined Patent Application Publication No. 2002-339719 (Patent Document 1) is a prior art document disclosing a mounting structure for an oil filler cap. In the oil filler cap mounting structure described in Patent Document 1, a cylindrical oil filler cap mounting portion projecting upward is provided at the upper portion of one end in the longitudinal direction of the cylinder head cover, and the oil filler cap is mounted on the oil filler cap mounting portion. installed.

JP-A-2002-339719

The oil filler cap may loosen due to vibrations of the engine or the like when the fastening to the cap mounting portion is insufficient, or when the sealing portion of the oil filler cap deteriorates. If the oil filler cap is loosened, oil leakage may occur.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an oil filler cap capable of suppressing loosening of the oil filler cap.

An oil filler cap based on the present invention is an oil filler cap that is attached by screwing into an oil filler port having a female threaded portion. The oil filler cap includes a columnar portion, a lid portion, a seal member, a first rotary plate, a second rotary plate, a connection pin, a fixed shaft, and a lock plate. The columnar portion has a male threaded portion formed on its outer periphery to be screwed with the female threaded portion, and extends in the axial direction of the virtual central axis. The lid portion is provided at one end of the columnar portion in the axial direction and covers the fuel filler port. The sealing member is sandwiched between the lid portion and the first open end of the fuel filler opening on the side facing the lid portion. The seal member is annular. The first rotating plate is disposed on the side opposite to the columnar portion side of the lid portion, and is rotatable relative to the lid portion in the circumferential direction of the columnar portion. The second rotating plate is provided so as to face the other axial end of the columnar portion, and rotates in the circumferential direction together with the first rotating plate. The connecting pin passes through the columnar portion and the lid portion and through the through hole extending in the circumferential direction, and extends along the axial direction to connect the first rotating plate and the second rotating plate to each other. Connecting. A fixed shaft is provided at the other end of the columnar portion. The lock plate is positioned between the other end of the columnar portion and the second rotating plate, and has an opening corresponding to the movement trajectory of the connection pin. It rotates about the fixed shaft and engages with the second open end located on the opposite side of the first open end of the filler port so as to be able to contact and separate therefrom.

In one form of the invention, the oil filler cap further comprises a cover. The cover is arranged so that the first rotating plate is positioned between the cover and the lid portion, and is attached to the columnar portion or the lid portion so as to rotate in the circumferential direction together with the first rotating plate. The cover has a flange portion having an inner peripheral surface facing the outer peripheral surface of the lid portion, and an inner protruding portion that protrudes from the inner peripheral surface and is in sliding contact with the columnar portion or the lid portion in the circumferential direction.

In one aspect of the present invention, after the male threaded portion and the female threaded portion are screwed together, the inner protruding portion slides on the columnar portion or the lid portion in the circumferential direction, thereby moving the lock plate to the second open end. engage.

In one aspect of the present invention, sliding between the inner projecting portion and the columnar portion or the lid portion is restricted when the lock plate is engaged with the second open end.

In one form of the present invention, the oil filler cap further includes an elastic body. The elastic body is sandwiched between the inner protrusion and the lid. A seal member is sandwiched between the inner protrusion and the first open end. The elastic body biases the inner protrusion so that the seal member is compressed.

According to the present invention, loosening of the oil filler cap can be suppressed.

FIG. 4 is a cross-sectional view showing an unlocked state of the oil filler cap according to Embodiment 1 of the present invention; FIG. 2 is a cross-sectional view of the oil filler cap of FIG. 1 as viewed in the direction of arrows on line II-II. FIG. 2 is a cross-sectional view of the oil filler cap of FIG. 1 as viewed in the direction of arrows on line III-III. FIG. 2 is a cross-sectional view of the oil filler cap of FIG. 1 as seen from the direction of arrows on line IV-IV. FIG. 4 is a cross-sectional view showing a locked state of the oil filler cap according to Embodiment 1 of the present invention; FIG. 6 is a cross-sectional view of the oil filler cap of FIG. 5 viewed from the direction of arrows on line VI-VI. FIG. 6 is a cross-sectional view of the oil filler cap of FIG. 5 as viewed in the direction of arrows on line VII-VII; FIG. 6 is a cross-sectional view of the oil filler cap of FIG. 5 as viewed in the direction of arrows on line VIII-VIII. FIG. 8 is a cross-sectional view showing an unlocked state of the oil filler cap according to Embodiment 2 of the present invention; FIG. 11 is a cross-sectional view showing an unlocked state of an oil filler cap according to Embodiment 3 of the present invention; FIG. 11 is a cross-sectional view of the oil filler cap of FIG. 10 viewed from the direction of the arrows on the line XI-XI; FIG. 11 is a cross-sectional view of the oil filler cap of FIG. 10 viewed from the direction of arrows XII-XII. FIG. 11 is a cross-sectional view showing a locked state of an oil filler cap according to Embodiment 3 of the present invention; FIG. 14 is a cross-sectional view of the oil filler cap of FIG. 13 as viewed in the direction of arrows XIV-XIV. FIG. 14 is a cross-sectional view of the oil filler cap of FIG. 13 as viewed in the direction of arrows XV--XV;

Hereinafter, an oil filler cap according to each embodiment of the present invention will be described with reference to the drawings. In the following description, the same reference numerals are given to the same or corresponding parts in the drawings, and the description thereof will not be repeated.

(Embodiment 1)
FIG. 1 is a sectional view showing an unlocked state of an oil filler cap according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of the oil filler cap of FIG. 1 as viewed from the direction of the arrows on line II-II. FIG. 3 is a cross-sectional view of the oil filler cap of FIG. 1 as viewed in the direction of arrows on line III-III. FIG. 4 is a cross-sectional view of the oil filler cap of FIG. 1 as seen from the direction of arrows on line IV-IV. In addition, in FIG. 1, members located in different cross sections are also illustrated for convenience of explanation.

As shown in FIG. 1, an oil filler cap 100 according to Embodiment 1 of the present invention is an oil filler cap that is attached by being screwed into an oil filler port 11 having a female threaded portion 12 formed therein. A fuel filler port 11 is provided in the head cover 10 . Oil filler port 11 has a first open end 13 located outside head cover 10 and a second open end 14 located inside head cover 10 . Female threaded portion 12 is provided on the inner periphery of fuel filler port 11 .

The oil filler cap 100 includes a columnar portion 111, a lid portion 112, a seal member 120, a first rotary plate 130, a second rotary plate 140, a connection pin, a fixed shaft, and a lock plate. Oil filler cap 100 further includes cover 180 .

The columnar portion 111 and the lid portion 112 are integrally formed. A cap body 110 is composed of the columnar portion 111 and the lid portion 112 . The cap body 110 has one end face 110a at one end in the axial direction of a virtual central axis C described later, and has the other end face 110b at the other end in the axial direction of the virtual central axis C. As shown in FIG.

The columnar portion 111 has a male threaded portion 113 that is screwed with the female threaded portion 12 and extends in the axial direction of the imaginary central axis C. As shown in FIG. The columnar portion 111 has a substantially cylindrical outer shape.

Lid portion 112 is provided at one end of columnar portion 111 in the axial direction of imaginary central axis C, and covers fuel filler port 11 . Specifically, the lid portion 112 has a substantially disk-like shape with a diameter larger than the diameter of the columnar portion 111 . The lid portion 112 has a cylindrical seal receiver extending from the outer peripheral end portion of the lid portion 112 to the other side in the axial direction of the imaginary center axis C so as to face the outer peripheral surface of the columnar portion 111 with a gap therebetween. A section 118 is provided. An annular groove 119 is provided along the entire circumference of the outer peripheral surface of the lid portion 112 .

As shown in FIGS. 1 and 2, a first fixed shaft 116 and a second fixed shaft 117 are provided at the other end of the columnar portion 111 in the axial direction of the imaginary central axis C. As shown in FIGS. Specifically, a first fixed shaft 116 and a second fixed shaft 117 are provided so as to protrude from the other end surface 110b of the cap main body 110 along the axial direction of the virtual central axis C. As shown in FIG. Each of first fixed shaft 116 and second fixed shaft 117 has a cylindrical outer shape. The first fixed shaft 116 and the second fixed shaft 117 are arranged point-symmetrically with respect to the virtual central axis C when viewed in the axial direction of the virtual central axis C. As shown in FIG.

As shown in FIG. 1 , seal member 120 is sandwiched between lid portion 112 and first open end 13 of fuel filler opening 11 on the side facing lid portion 112 . Seal member 120 is annular. Specifically, the sealing member 120 is sandwiched and compressed between the outer peripheral surface of the columnar portion 111, the seal receiving portion 118, and the first open end 13 in a state where the female threaded portion 12 and the male threaded portion 113 are screwed together. maintained in state.

The sealing member 120 is a so-called packing. In the present embodiment, seal member 120 is made of rubber, but may be made of resin, plastic, or the like.

The first rotating plate 130 is arranged on the opposite side of the lid portion 112 to the columnar portion 111 side, and is rotatable with respect to the lid portion 112 in the circumferential direction of the columnar portion 111 . The first rotating plate 130 has a disc-shaped outer shape. The first rotating plate 130 is positioned between one end surface 110 a of the cap body 110 and the cover 180 . The first rotating plate 130 is in sliding contact with one end surface 110 a of the cap body 110 .

A first hole portion 131 and a second hole portion 132 are provided in the surface of the first rotary plate 130 on one end side in the axial direction of the virtual center axis C. As shown in FIG. Each of the first hole portion 131 and the second hole portion 132 has a circular shape when viewed in the axial direction of the imaginary central axis C, and is arranged point-symmetrically with respect to the imaginary central axis C. As shown in FIG.

As shown in FIGS. 1 and 2, the second rotating plate 140 is provided so as to face the other end of the columnar portion 111 in the axial direction of the imaginary center axis C. rotates in the circumferential direction of the The second rotating plate 140 has a disk-like outer shape. The second rotating plate 140 faces the other end surface 110b of the cap body 110 with a gap therebetween.

As shown in FIGS. 1 to 3, the oil filler cap 100 has a first connection pin 151 and a second connection pin 152. As shown in FIG. The first connection pin 151 is inserted through the first through hole 114 extending in the circumferential direction of the columnar portion 111 and the lid portion 112 and extending in the axial direction of the virtual central axis C. , the first rotating plate 130 and the second rotating plate 140 are connected to each other. The first connection pin 151 has a cylindrical outer shape.

The second connection pin 152 is inserted through the second through hole 115 extending in the circumferential direction of the columnar portion 111 and the lid portion 112 and extending in the axial direction of the virtual center axis C. , the first rotating plate 130 and the second rotating plate 140 are connected to each other. The second connection pin 152 has a cylindrical outer shape.

As shown in FIGS. 1 and 2, the oil filler cap 100 has a first lock plate 160 and a second lock plate 170. As shown in FIG. Each of the first locking plate 160 and the second locking plate 170 is positioned between the other axial end of the virtual central axis C of the columnar portion 111 and the second rotating plate 140 . That is, each of the first locking plate 160 and the second locking plate 170 is positioned between the other end surface 110 b of the cap body 110 and the second rotating plate 140 . Each of first locking plate 160 and second locking plate 170 has a thin rectangular parallelepiped outer shape.

The first lock plate 160 has a first bearing hole 161 that slides on the first fixed shaft 116 and a first opening 162 that corresponds to the locus of movement of the first connection pin 151 . The first bearing hole 161 has a circular shape when viewed from the axial direction of the virtual center axis C. As shown in FIG. The diameter of first bearing hole 161 is slightly larger than the diameter of first fixed shaft 116 . The first opening 162 has an oval shape when viewed from the axial direction of the virtual central axis C. As shown in FIG. The first locking plate 160 is in sliding contact with each of the other end surface 110b of the cap body 110 and the second rotating plate 140 .

The second lock plate 170 has a second bearing hole 171 that slides on the second fixed shaft 117 and a second opening 172 that corresponds to the locus of movement of the second connection pin 152 . The second bearing hole 171 has a circular shape when viewed from the axial direction of the virtual central axis C. As shown in FIG. The diameter of the second bearing hole 171 is slightly larger than the diameter of the second fixed shaft 117 . The second opening 172 has an oval shape when viewed from the axial direction of the virtual center axis C. As shown in FIG. The second lock plate 170 is in sliding contact with each of the other end surface 110b of the cap body 110 and the second rotating plate 140 .

As shown in FIG. 1 , the cover 180 is attached to the lid portion 112 so as to rotate in the circumferential direction of the columnar portion 111 together with the first rotating plate 130 . Specifically, the cover 180 has a first projecting portion 182 and a second projecting portion 182 so as to project along the axial direction of the virtual central axis C from an inner bottom surface 181 facing the one end surface 110a of the cap body 110 of the cover 180 . A protrusion 183 is provided. Each of the first projecting portion 182 and the second projecting portion 183 has a cylindrical outer shape.

The first projecting portion 182 is fitted with the first hole portion 131 , and the second projecting portion 183 is fitted with the second hole portion 132 . Thereby, the cover 180 and the first rotating plate 130 are connected to each other.

As shown in FIG. 1 , the cover 180 includes a flange portion 185 having an inner peripheral surface 189 that faces the outer peripheral surface of the lid portion 112 , and a flange portion 185 that protrudes from the inner peripheral surface 189 and protrudes from the lid portion 112 in the circumferential direction of the columnar portion 111 . It has an inner protruding portion 184 that slides on the . Inner projection 184 engages annular groove 119 .

In this embodiment, as shown in FIG. 4, the inner protruding portion 184 has two protrusions 184p gently protruding inward when viewed from the axial direction of the imaginary central axis C. As shown in FIG. The two protrusions 184p are arranged point-symmetrically with respect to the virtual central axis C. As shown in FIG.

The bottom surface of the annular groove 119 that is in sliding contact with the two projections 184p is an enlarged diameter portion positioned radially outward of the columnar portion 111 toward one side in the circumferential direction of the columnar portion 111 when viewed from the axial direction of the imaginary center axis C. 119s, and a concave portion 119d that is continuously provided at one end in the circumferential direction of the columnar portion 111 in the enlarged diameter portion 119s and engages with the projection 184p. The concave portion 119d has a shape along the projection 184p when viewed from the axial direction of the imaginary center axis C. As shown in FIG.

In this embodiment, the bottom surface of the annular groove 119 is provided with two enlarged diameter portions 119s and two recessed portions 119d. The two enlarged-diameter portions 119s are arranged point-symmetrically with respect to the virtual central axis C. As shown in FIG. The two recesses 119d are arranged point-symmetrically with respect to the virtual central axis C. As shown in FIG.

The operation of the oil filler cap 100 according to Embodiment 1 of the present invention will be described below. By gripping the cover 180 and rotating it to one side around the virtual central axis C, the cover 180 and the cap body 110 rotate together, and as shown in FIG. are screwed together. At this time, the projection 184p shown in FIG. 4 is engaged with the enlarged diameter portion 119s, thereby restricting the sliding movement between the inner projecting portion 184 and the lid portion 112. As shown in FIG.

FIG. 5 is a sectional view showing a locked state of the oil filler cap according to Embodiment 1 of the present invention. 6 is a cross-sectional view of the oil filler cap of FIG. 5 viewed from the direction of arrows VI--VI. FIG. 7 is a cross-sectional view of the oil filler cap of FIG. 5 as viewed in the direction of arrows VII--VII. FIG. 8 is a cross-sectional view of the oil filler cap of FIG. 5 as viewed in the direction of arrows on line VIII-VIII. In addition, in FIG. 5, members located in different cross sections are also illustrated for convenience of explanation.

After the male threaded portion 113 and the female threaded portion 12 are screwed together, the cover 180 is gripped and further rotated to one side around the imaginary center axis C, so that the inner protruding portion 184 becomes a columnar portion with respect to the lid portion 112 . By sliding in one of the circumferential directions of 111, each of first locking plate 160 and second locking plate 170 engages second open end 14, as shown in FIG. As a result, the oil filler cap 100 is locked.

As shown in FIGS. 5 to 7, first lock plate 160 rotates about first fixed shaft 116 as first connection pin 151 moves relative to first fixed shaft 116 to lock oil filler port 11 at the first position. The first opening end 13 engages with the second opening end 14 positioned opposite to the opening end 13 so as to be contactable and separable. The second lock plate 170 rotates about the second fixed shaft 117 as the second connection pin 152 moves with respect to the second fixed shaft 117 and is positioned on the opposite side of the first open end 13 of the fuel filler port 11 . It engages with the second opening end 14 to be able to contact and separate.

As shown in FIG. 8 , in a state where each of first locking plate 160 and second locking plate 170 is engaged with second opening end 14 , sliding between inner projecting portion 184 and lid portion 112 is restricted. Specifically, when the inner projecting portion 184 slides relative to the lid portion 112 in one circumferential direction of the columnar portion 111, the protrusion 184p shown in FIG. 111 in the circumferential direction and to the radially outer side of the columnar portion 111 . After that, the projection 184p is fitted inside the recess 119d, thereby restricting the sliding between the inner projecting portion 184 and the lid portion 112. As shown in FIG. As a result, unintentional unlocking of the oil filler cap 100 can be suppressed.

When removing the oil filler cap 100 from the head cover 10, the cover 180 is gripped and rotated to the other side around the imaginary central axis C, whereby the projection 184p moves from the recess 119d onto the enlarged diameter portion 119s. Then, it moves to the other side in the circumferential direction of the columnar portion 111 and to the inner side in the radial direction of the columnar portion 111 while being in sliding contact with the enlarged diameter portion 119s. As a result, each of first locking plate 160 and second locking plate 170 is separated from second open end 14, and oil filler cap 100 is unlocked. By gripping the cover 180 in this state and further rotating it to the other side around the imaginary central axis C, the cover 180 and the cap main body 110 are rotated together, and the thread between the female screw portion 12 and the male screw portion 113 is rotated. combination is canceled.

In the oil filler cap 100 according to Embodiment 1 of the present invention, the first lock plate 160 rotates about the first fixed shaft 116 as the first connection pin 151 moves relative to the first fixed shaft 116. A second open end 14 located on the opposite side of the first open end 13 of the fuel filler port 11 is engaged with the second open end 14 in a separable manner. The second lock plate 170 rotates about the second fixed shaft 117 as the second connection pin 152 moves with respect to the second fixed shaft 117 and is positioned on the opposite side of the first open end 13 of the fuel filler port 11 . It engages with the second opening end 14 to be able to contact and separate.

When the male threaded portion 113 and the female threaded portion 12 are screwed together, each of the first lock plate 160 and the second lock plate 170 is in contact with the second open end 14, thereby suppressing loosening of the oil filler cap 100. be able to. Although both the first locking plate 160 and the second locking plate 170 are provided in this embodiment, at least one of the first locking plate 160 and the second locking plate 170 may be provided.

The oil filler cap 100 according to Embodiment 1 of the present invention further includes a cover 180. The cover 180 is arranged such that the first rotating plate 130 is positioned between the cover 180 and the lid portion 112, and the first rotating plate 130 is positioned between the cover 180 and the lid portion 112. The flange portion 185 is attached to the lid portion 112 so as to rotate in the circumferential direction of the columnar portion 111 together with the plate 130 . It has an inner protruding portion 184 which is in sliding contact with the lid portion 112 in the circumferential direction of the columnar portion 111 .

By making the sliding resistance between the outer peripheral surface of the lid portion 112 and the inner protruding portion 184 greater than the sliding resistance when the male threaded portion 113 and the female threaded portion 12 are screwed together, the cover 180 is gripped to form a virtual central axis. By rotating to one side around the axis C, the male threaded portion 113 and the female threaded portion 12 are screwed together, and further, each of the first lock plate 160 and the second lock plate 170 and the second open end 14 are engaged. By engaging, the oil filler cap 100 can be locked. Further, by holding the cover 180 and rotating it to the other side around the virtual center axis C, each of the first locking plate 160 and the second locking plate 170 is separated from the second opening end 14, The lock of the oil filler cap 100 can be released, and the screwing between the male threaded portion 113 and the female threaded portion 12 can be released.

In the oil filler cap 100 according to Embodiment 1 of the present invention, after the male threaded portion 113 and the female threaded portion 12 are screwed together, the inner protruding portion 184 slides in the circumferential direction of the lid portion 112 and the columnar portion 111 . , first locking plate 160 and second locking plate 170 each engage second open end 14 . Accordingly, after the oil filler cap 100 is attached to the head cover 10, the oil filler cap 100 can be locked.

In the oil filler cap 100 according to Embodiment 1 of the present invention, when each of the first lock plate 160 and the second lock plate 170 is engaged with the second open end 14, the inner projecting portion 184 and the lid portion 112 is regulated. As a result, unintentional unlocking of the oil filler cap 100 can be suppressed.

(Embodiment 2)
An oil filler cap according to Embodiment 2 of the present invention will be described below with reference to the drawings. Note that the oil filler cap according to Embodiment 2 of the present invention differs from the oil filler cap 100 according to Embodiment 1 mainly in that an elastic body for preventing loosening is provided. The description of the configuration similar to is not repeated.

FIG. 9 is a cross-sectional view showing an unlocked state of the oil filler cap according to Embodiment 2 of the present invention. In FIG. 9, members located in different cross sections are also illustrated for convenience of explanation.

As shown in FIG. 9, an oil filler cap 200 according to Embodiment 2 of the present invention includes a columnar portion 211, a lid portion 212, a seal member 120, a first rotating plate 130, and a second rotating plate 140. , a connecting pin, a fixed shaft and a locking plate. Oil filler cap 200 further includes cover 280 and elastic body 220 .

The columnar portion 211 and the lid portion 212 are integrally formed. A cap body 210 is composed of the columnar portion 211 and the lid portion 212 . The cap body 210 has one end face 210a at one end in the axial direction of the virtual central axis C, and has the other end face 210b at the other end in the axial direction of the virtual central axis C. As shown in FIG.

The columnar portion 211 has a male threaded portion 113 that is screwed with the female threaded portion 12 and extends in the axial direction of the imaginary central axis C. As shown in FIG. The columnar portion 211 has a substantially cylindrical outer shape. An annular groove 219 is provided along the entire circumference of the outer peripheral surface of the columnar portion 211 .

Lid portion 212 is provided at one end of columnar portion 211 in the axial direction of imaginary central axis C, and covers fuel filler port 11 . Specifically, the lid portion 212 has a substantially disk-like shape with a diameter larger than the diameter of the columnar portion 211 . The lid portion 212 has a tubular elastic body extending from the outer peripheral end portion of the lid portion 212 to the other side in the axial direction of the imaginary central axis C so as to face the outer peripheral surface of the columnar portion 211 with a gap therebetween. A receiver 218 is provided.

The cover 280 is attached to the columnar portion 211 so as to rotate in the circumferential direction of the columnar portion 211 together with the first rotating plate 130 . The cover 280 includes a flange portion 285 having an inner peripheral surface 289 facing the outer peripheral surface of the lid portion 212, and an inner protruding portion 284 that protrudes from the inner peripheral surface 289 and slides against the columnar portion 211 in the circumferential direction of the columnar portion 211. have Inner projection 284 engages annular groove 219 . A portion of the inner protruding portion 284 in sliding contact with the columnar portion 211 extends along the other side of the imaginary center axis C in the axial direction. That is, the inner protruding portion 284 has a portion extending along the radial direction of the columnar portion 211 so as to approach the columnar portion 211 and a portion extending from the inner peripheral end of the portion along the other axial side of the imaginary center axis C. and an extending portion.

In the cover 280, the portion of the inner protruding portion 284 extending along the other axial side of the imaginary central axis C is positioned radially outwardly of the columnar portion 211 with a gap therebetween. , a tubular seal receiving portion 288 extending to the other side in the axial direction of the virtual center axis C is provided.

The seal member 120 is sandwiched between the lid portion 212 and the first open end 13 . Specifically, the seal member 120 is sandwiched and compressed between the inner projecting portion 284, the seal receiving portion 288, and the first open end 13 when the female threaded portion 12 and the male threaded portion 113 are screwed together. retained.

The elastic body 220 is sandwiched between the inner projecting portion 284 and the lid portion 212 . Elastic body 220 biases inner protrusion 284 such that seal member 120 is compressed. In this embodiment, the elastic body 220 is a compression coil spring, but it is not limited to a spring, and may be an annular rubber or the like.

The oil filler cap 200 according to Embodiment 2 of the present invention further includes an elastic body 220 sandwiched between the inner projecting portion 284 and the lid portion 212 . The seal member 120 is sandwiched therebetween, and the elastic body 220 biases the inner protrusions 284 so that the seal member 120 is compressed.

Thus, even if the seal member 120 deteriorates, the axial force acting between the female threaded portion 12 and the male threaded portion 113 can be maintained by the biasing force of the elastic body 220 . As a result, it is possible to restrict the sliding between the cover 280 and the cap body 110 without providing a structure for restricting the sliding between the cover 180 and the cap body 110 in the oil filler cap 100 according to the first embodiment. Unintentional unlocking of the oil filler cap 200 can be suppressed.

(Embodiment 3)
An oil filler cap according to Embodiment 3 of the present invention will be described below with reference to the drawings. Note that the oil filler cap according to Embodiment 3 of the present invention differs from the oil filler cap 100 according to Embodiment 1 mainly in that it does not include a cover, and thus is the same as the oil filler cap 100 according to Embodiment 1. The configuration will not be repeated.

FIG. 10 is a cross-sectional view showing an unlocked state of the oil filler cap according to Embodiment 3 of the present invention. 11 is a cross-sectional view of the oil filler cap of FIG. 10 as viewed from the direction of arrows XI--XI. FIG. 12 is a cross-sectional view of the oil filler cap of FIG. 10 viewed from the direction of arrows XII--XII. In addition, in FIG. 10, members located in different cross sections are also illustrated for convenience of explanation.

As shown in FIG. 10, an oil filler cap 300 according to Embodiment 3 of the present invention includes a columnar portion 111, a lid portion 312, a seal member 120, a first rotating plate 330, and a second rotating plate 140. , a connecting pin, a fixed shaft and a locking plate.

The columnar portion 111 and the lid portion 312 are integrally formed. A cap body 310 is composed of the columnar portion 111 and the lid portion 312 . The cap body 310 has one end face 310a at one end in the axial direction of the virtual central axis C, and has the other end face 310b at the other end in the axial direction of the virtual central axis C. As shown in FIG.

Lid portion 312 is provided at one end of columnar portion 111 in the axial direction of imaginary center axis C, and covers fuel filler opening 11 . Specifically, the lid portion 312 has a substantially disk-like shape with a diameter larger than the diameter of the columnar portion 111 . The lid portion 312 has a tubular seal receiver extending from the outer peripheral end portion of the lid portion 312 to the other side in the axial direction of the imaginary central axis C so as to face the outer peripheral surface of the columnar portion 111 with a gap therebetween. A section 118 is provided.

The first rotating plate 330 is arranged on the opposite side of the lid portion 312 to the columnar portion 111 side, and is provided so as to be rotatable with respect to the lid portion 312 in the circumferential direction of the columnar portion 111 . The first rotating plate 330 has a disc-shaped outer shape. The first rotating plate 330 is in sliding contact with one end surface 310 a of the cap body 310 . The first rotating plate 330 rotates in the circumferential direction of the columnar portion 111 together with the second rotating plate 140 .

The operation of the oil filler cap 300 according to Embodiment 3 of the present invention will be described below. By gripping the lid portion 312 and rotating it to one side around the virtual central axis C, the cap body 310 is rotated and the female thread portion 12 and the male thread portion 113 are screwed together as shown in FIG. .

FIG. 13 is a sectional view showing a locked state of the oil filler cap according to Embodiment 3 of the present invention. 14 is a cross-sectional view of the oil filler cap of FIG. 13 as viewed from the direction of arrows XIV-XIV. 15 is a cross-sectional view of the oil filler cap of FIG. 13 as viewed in the direction of arrows XV--XV. In addition, in FIG. 13, members located in different cross sections are also illustrated for convenience of explanation.

After the male threaded portion 113 and the female threaded portion 12 are screwed together, the first rotating plate 330 is gripped and rotated to one side around the imaginary center axis C, so that the first locking portion 330 is engaged as shown in FIG. Plate 160 and second locking plate 170 each engage second open end 14 . As a result, the oil filler cap 300 is locked.

When removing the oil filler cap 300 from the head cover 10, the first locking plate 160 and the second locking plate 170 are separated by gripping the first rotating plate 330 and rotating it to the other side around the imaginary central axis C. are separated from the second open end 14 and the oil filler cap 300 is unlocked. By gripping the lid portion 312 in this state and rotating it to the other side around the virtual central axis C, the cap main body 310 is rotated and the threaded engagement between the female threaded portion 12 and the male threaded portion 113 is released.

In the oil filler cap 300 according to Embodiment 3 of the present invention, loosening of the oil filler cap 300 can be suppressed while simplifying the configuration by not providing a cover.

It should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above description, and is intended to include all modifications within the meaning and range of equivalents of the scope of the claims.

10 head cover 11 oil filler port 12 female threaded portion 13 first opening end 14 second opening end 100, 200, 300 oil filler cap 110, 210, 310 cap main body 110a, 210a, 310a one end surface 110b, 210b, 310b other end surface 111, 211 columnar portion 112, 212, 312 lid portion 113 male screw portion 114 first through hole 115 second through hole 116 first fixed shaft 117 second fixed shaft 118, 288 seal receiving portion 119, 219 annular groove 119d concave portion 119s enlarged diameter portion 120 sealing member 130, 330 first rotating plate 131 first hole portion 132 second hole portion 140 second rotating plate , 151 first connecting pin, 152 second connecting pin, 160 first locking plate, 161 first bearing hole, 162 first opening, 170 second locking plate, 171 second bearing hole, 172 second opening, 180, 280 cover, 181 bottom surface, 182 first protrusion, 183 second protrusion, 184, 284 inner protrusion, 184p protrusion, 185, 285 flange, 189, 289 inner peripheral surface, 218 elastic body receiving portion, 220 elastic body, C Virtual central axis.

Claims (5)

An oil filler cap that is attached by screwing into an oil filler port formed with a female thread,
a columnar portion having a male threaded portion formed on the outer periphery thereof and extending in the axial direction of the virtual central axis;
a lid portion provided at one end of the columnar portion in the axial direction and covering the fuel filler port;
an annular sealing member sandwiched between the lid portion and a first open end of the fuel filler port facing the lid portion;
a first rotating plate disposed on the side opposite to the columnar portion side of the lid portion and provided so as to be rotatable in the circumferential direction of the columnar portion with respect to the lid portion;
a second rotating plate provided to face the other end of the columnar portion in the axial direction and rotating in the circumferential direction together with the first rotating plate;
It penetrates through the columnar portion and the lid portion and through the through hole extending in the circumferential direction, and extends along the axial direction to connect the first rotating plate and the second rotating plate to each other. a connection pin to be connected,
a fixed shaft provided at the other end of the columnar portion;
Positioned between the other end of the columnar portion and the second rotating plate, and having an opening corresponding to the movement locus of the connection pin, the opening is formed along with the movement of the connection pin relative to the fixed shaft. an oil filler cap that rotates around the fixed shaft and removably engages a second open end of the oil filler port located on the opposite side of the first open end. a cover arranged so that the first rotating plate is positioned between it and the lid portion, and attached to the columnar portion or the lid portion so as to rotate together with the first rotating plate in the circumferential direction; further prepared,
The cover has a flange portion having an inner peripheral surface facing an outer peripheral surface of the lid portion, and an inner protruding portion that protrudes from the inner peripheral surface and is in sliding contact with the columnar portion or the lid portion in the circumferential direction. Item 1. The oil filler cap according to item 1. After the male threaded portion and the female threaded portion are screwed together, the inner protruding portion slides on the columnar portion or the lid portion in the circumferential direction, thereby engaging the lock plate with the second open end. 3. The oil filler cap according to claim 2. 4. The oil filler cap according to claim 3, wherein, in a state in which said lock plate is engaged with said second open end, sliding between said inner projecting portion and said columnar portion or said lid portion is restricted. further comprising an elastic body sandwiched between the inner protruding portion and the lid portion;
The seal member is sandwiched between the inner protruding portion and the first opening end,
3. The oil filler cap according to claim 2, wherein said elastic body urges said inner protruding portion such that said seal member is compressed.

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