JP2012097869A - Sealing member for outboard motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inhibit degradation in the appearance of the outboard motor due to surface sinking, while reliably sealing between a lower cover and an upper cover and to reduce weight of the outboard motor.SOLUTION: In a sealing member 5 disposed between an edge upper end 2A of a lower cover 2 of the outboard motor and an edge lower end 3A of an upper cover 3 of the motor, the following parts are formed: a first supporting part 25 for determining a mounting position in a vertical direction of the upper cover 3 with respect to the lower cover 2; a second supporting part 26 for determining a mounting position in a horizontal direction of the upper cover 3 with respect to the lower cover 2; and a sealing part 27 performing the seal between the lower cover 2 and the upper cover 3. By this configuration, formation of a recess or the like in an edge lower end 3A of the upper cover 3 is unnecessary, and changes in the thickness of a sidewall of the upper cover 3 are unnecessary, thereby preventing sinking. Further, preparation of another engaging member for positioning the upper cover 3 with respect to the lower cover 2 is unnecessary.

Description

  The present invention relates to an outboard motor seal member provided between a lower cover and an upper cover that form an outer shell of an outboard motor.

  In general, an outboard motor includes a substantially box-shaped lower cover that forms an outer shell of the outboard motor and that is open on the upper side, and an upper cover that closes the upper side of the lower cover, and is formed by the lower cover and the upper cover. An engine or the like is accommodated in the space. A seal member is provided between the lower cover and the upper cover to prevent water from entering the space in which the engine or the like is accommodated.

  Patent Documents 1 and 2 describe a seal member provided between a lower cover and an upper cover of such an outboard motor.

JP-A-4-307181 JP-A-6-171595

  A seal member that seals between the lower cover and the upper cover of the outboard motor is formed in a ring shape, and is attached to the upper peripheral edge of the lower cover or the lower peripheral edge of the upper cover. And a sealing member seals between the peripheral upper end part of a lower cover, and the peripheral lower end part of an upper cover over a perimeter, when an upper cover is attached on a lower cover.

  By the way, in order to securely seal the entire periphery between the upper edge of the lower cover and the lower edge of the upper cover by the seal member, the elastic deformation range of the seal member in the seal member is set to an appropriate range. For this purpose, it is necessary that the mounting position of the upper cover with respect to the lower cover be an appropriate position planned at the time of design both in the vertical direction and in the horizontal direction. When the vertical or horizontal mounting position of the upper cover with respect to the lower cover deviates from the appropriate position, a gap is formed between the seal member and the lower cover, or between the seal member and the upper cover. Permits intrusion.

  Such a shift in the mounting position of the upper cover with respect to the lower cover can be suppressed by, for example, the following method. That is, irregularities that engage with each other are formed on the upper peripheral edge of the lower cover and the lower peripheral edge of the upper cover, and these irregularities are engaged with each other when the upper cover is mounted on the lower cover. Thereby, it can suppress that the attachment position of the upper cover with respect to a lower cover shifts | deviates from an appropriate position.

  In this regard, FIG. 1 of Patent Document 1 shows that a rib is formed on the outer peripheral side and a step portion is formed on the inner peripheral side at the upper peripheral edge of the lower cover (bottom cowl), while the peripheral edge of the upper cover (top cowl) is formed. At the lower end, a step is formed on the outer peripheral side and a rib is formed on the inner peripheral side. When the upper cover is mounted on the lower cover, the rib on the lower cover is engaged with the step on the upper cover side, and the upper cover A structure is described in which the mounting position of the upper cover with respect to the lower cover is positioned at an appropriate position by engaging the rib on the side with the step on the lower cover side. And the sealing member in patent document 1 is provided between the rib and step part by the side of a lower cover, and the rib and step part by the side of an upper cover.

  In FIG. 6 of Patent Document 2, a rib is provided at the lower end of the periphery of the upper cover, a recess (groove) is formed between the lower end of the periphery and the rib, and the upper cover is attached on the lower cover. In some cases, a structure is provided in which the upper cover mounting position with respect to the lower cover is positioned at an appropriate position by inserting the peripheral upper end of the lower cover into the recess on the upper cover side. And the sealing member in patent document 2 is provided between the recessed part by the side of an upper cover, and the peripheral upper end part of a lower cover.

  However, in the above-described structure in Patent Document 1, ribs and stepped portions are formed at the upper peripheral edge of the lower cover and the lower peripheral edge of the upper cover, respectively. Therefore, the upper edge of the lower cover and the lower peripheral edge of the upper cover are partially The thickness of the side wall of the cover changes. When the lower cover and the upper cover are formed of resin, sink marks occur due to changes in the thickness of these side walls. Sinks generated in the lower cover or the upper cover damage the appearance of the outboard motor. In particular, since the upper cover is disposed in a more conspicuous position than the lower cover, there is a problem that sink marks generated in the upper cover greatly damage the appearance of the outboard motor.

  Similarly, in the above-described structure in Patent Document 2, since the concave portion is formed in the lower edge portion of the upper cover, the thickness of the side wall of the cover is partially changed at the lower edge portion of the upper cover. When the cover is formed of resin, there is a problem that the appearance of the outboard motor is greatly impaired due to the occurrence of sink marks.

  On the other hand, in some outboard motors, engagement members that engage with each other when the upper cover is mounted on the lower cover and position the mounting position of the upper cover with respect to the lower cover at an appropriate position are provided on the inner side of the upper cover and the lower cover. There is something attached to each. Certainly, by attaching the engaging member to the inside of the upper cover or the lower cover, the mounting position of the upper cover with respect to the lower cover can be positioned at an appropriate position without changing the thickness of the side wall of the upper cover. However, in this case, since it is necessary to provide an engaging member for each of the upper cover and the lower cover, the weight of the outboard motor increases, the size of the outboard motor increases, or the space inside the cover decreases, resulting in a lighter outboard motor. There is a problem that it is difficult to reduce the size or secure the space in the cover.

  The present invention has been made in view of the above-described problems, for example, and the first problem of the present invention is that the outboard motor has an external appearance due to the occurrence of sink marks while reliably sealing between the lower cover and the upper cover. An object of the present invention is to provide an outboard motor seal member that can be prevented from being damaged.

  A second object of the present invention is to provide a sealing member for an outboard motor capable of reducing the weight of the outboard motor, reducing the size of the outboard motor, or ensuring the space in the cover while securely sealing the space between the lower cover and the upper cover. Is to provide.

  In order to solve the above-mentioned problems, a first seal member for an outboard motor according to the present invention is provided between a lower cover that forms an outer shell of an outboard motor and that has an upper opening and an upper cover that closes the upper side of the lower cover. An outboard motor seal member that is provided between the lower cover and the upper cover and seals the entire circumference of the lower cover, the outer surface of the lower cover at the upper peripheral edge of the lower cover being substantially inside the lower cover over the entire circumference of the lower cover. Provided in the seal member mounting step formed by extending in the substantially vertical direction above the lower cover after extending in the horizontal direction, and the inner peripheral side surface extends in the substantially vertical direction of the seal member mounting step. A seal member main body that is in contact with the first surface and formed in a ring shape from an elastic material, and the seal from the lower side of the outer peripheral side surface of the seal member main body The outer surface of the seal member main body extends in the substantially horizontal direction over the entire circumference of the material main body, the lower surface abuts on the second surface of the seal member mounting step portion that extends in the substantially horizontal direction, and the upper surface extends from the upper cover. A first support portion that supports the upper cover in a direction perpendicular to the lower cover by abutting with a lower end surface of a peripheral lower end portion, and an outer peripheral side surface of the seal member main body than the first support portion. The upper cover is extended by extending substantially horizontally from the upper side to the outside of the seal member main body over the entire circumference of the seal member main body, and the outer peripheral side surface abuts on the inner peripheral side surface of the lower peripheral edge of the upper cover. A second support portion that supports the lower cover in a horizontal direction; and the seal member body on the outer peripheral side surface from above the second support portion on the side surface. The upper cover extends in the substantially horizontal direction outside the seal member main body over the entire circumference of the member main body, and the outer peripheral side surface comes into contact with the inner peripheral side surface of the lower peripheral edge of the upper cover in an elastically deformed state. And a seal portion for sealing between the lower cover and the lower cover.

  According to the first outboard motor seal member of the present invention, when the upper cover is mounted on the lower cover, the lower end surface of the lower peripheral edge of the upper cover comes into contact with the upper surface of the first support portion of the seal member. . Thereby, the attachment position in the vertical direction of the upper cover with respect to the lower cover becomes an appropriate position. Further, when the upper cover is mounted on the lower cover, the inner peripheral side surface of the lower end portion of the peripheral edge of the upper cover comes into contact with the outer peripheral side surface of the second support portion of the seal member. Thereby, the attachment position in the horizontal direction of the upper cover with respect to the lower cover becomes an appropriate position. Further, when the upper cover is attached on the lower cover, the inner peripheral side surface of the lower end portion of the peripheral edge of the upper cover is sealed by the seal portion of the seal member. Thereby, it is possible to prevent water from entering through between the lower cover and the upper cover.

  As described above, the upper cover is attached to the lower cover at the proper position in both the vertical direction and the horizontal direction by bringing the lower edge of the upper cover into contact with the first support part and the second support part of the seal member. Thus, the range of elastic deformation of the seal portion of the seal member can be maintained within an appropriate range. Therefore, it is possible to ensure a reliable sealing performance between the lower cover and the upper cover by the seal portion. Therefore, in order to position the mounting position of the upper cover with respect to the lower cover at an appropriate position, it is not necessary to form a recess or a step in the lower edge portion of the upper cover. Therefore, the thickness of the lower edge portion of the upper cover, etc. Since there is no need to change the height, sink marks do not occur at the lower edge of the upper cover. Therefore, the appearance of the outboard motor can be improved. In addition, since it is not necessary to separately provide an engaging member for positioning the upper cover to the lower cover at an appropriate position, the outboard motor can be reduced in weight and size, and the space in the cover can be secured.

  In order to solve the above-described problems, a second seal member for an outboard motor according to the present invention is the above-described first support portion and the second support in the seal member for an outboard motor according to the present invention. The first support portion and the outer peripheral side surface of the second support portion are in contact with each other. The first support portion and the second support portion are in contact with each other.

  According to the second seal member for an outboard motor of the present invention, the rigidity of the first support portion and the second support portion is obtained by integrally forming the first support portion and the second support portion. Can be increased. Accordingly, the upper cover can be firmly supported by the first support portion and the second support portion, and the attachment position of the upper cover with respect to the lower cover can be reliably positioned at an appropriate position.

  In order to solve the above problems, a third seal member for an outboard motor of the present invention is the above-described first or second seal member for an outboard motor of the present invention, on the inner peripheral side of the seal member main body. It is formed, and it has an attachment portion for attaching and fixing the seal member main body to the peripheral upper end portion of the lower cover by sandwiching the peripheral upper end portion of the lower cover from above.

  According to the third seal member for an outboard motor of the present invention, the seal member can be fixed to the upper end of the peripheral edge of the lower cover, so that the mountability of the upper cover to the lower cover is improved, and the upper cover is attached to the lower cover. It is possible to improve the positioning accuracy of the position and to securely seal between the lower cover and the upper cover.

  According to the present invention, while reliably sealing between the lower cover and the upper cover, it is possible to suppress the appearance of the outboard motor from being damaged due to the occurrence of sink marks, and to reduce the weight and size of the outboard motor. Or securing a space in the cover.

1 is an external view showing an outboard motor provided with a seal member for an outboard motor according to an embodiment of the present invention. FIG. 4 is an exploded perspective view showing an outboard motor seal member, a lower cover provided with the outboard motor seal member, and an upper cover according to an embodiment of the present invention. FIG. 3 is an end view showing a cross section of an outboard motor seal member according to an embodiment of the present invention as seen from the direction of arrows III-III in FIG. 2. FIG. 5 is an end view showing a cross section of the outboard motor seal member according to the embodiment of the present invention in a state where the upper cover is attached on the lower cover.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an outboard motor provided with an outboard motor seal member according to an embodiment of the present invention. In FIG. 1, an outboard motor 1 forms an outer shell of the outboard motor 1, and is formed in a substantially box-like lower cover 2 that is open on the upper side, and a substantially box-like shape that is attached on the lower cover 2 and that is open on the lower side. And an upper cover 3 that closes the opening of the lower cover 2. Both the lower cover 2 and the upper cover 3 are made of, for example, resin. An engine or the like (not shown) is accommodated in the space covered by the lower cover 2 and the upper cover 3. The upper cover 3 is detachably attached to the lower cover 2, and the user can remove the upper cover 3 from the lower cover 2 and perform maintenance of the engine accommodated in the space, for example. Further, the lower cover 2 is provided with a fastener 4 for fixing the upper cover 3 to the lower cover 2 in a state where the upper cover 3 is attached on the lower cover 2.

  An outboard motor seal member 5 according to an embodiment of the present invention is provided between the lower cover 2 and the upper cover 3. When the upper cover 3 is mounted on the lower cover 2, the seal member 5 positions the mounting position of the upper cover 3 with respect to the lower cover 2 at an appropriate position, and between the lower cover 2 and the upper cover 3, the entire circumference of both. And has a function of preventing water from entering the space containing the engine and the like from the outside.

  The outboard motor 1 includes a lower unit 7 having a propeller 6 and the like, a crank bracket 8 for fixing the outboard motor 1 to the stern plate 51 of the hull, and for operating the outboard motor 1 or the hull. The tiller handle 9 is provided.

  FIG. 2 shows a state in which the lower cover 2, the seal member 5, and the upper cover 3 are disassembled. 3 shows a cross section of the seal member 5 as seen from the direction of arrows III-III in FIG. 2, and FIG. 4 shows a cross section of the seal member 5 in a state where the upper cover 3 is attached on the lower cover 2. Yes. As shown in FIG. 2, the seal member 5 is formed in a ring shape so as to correspond to the peripheral upper end 2 </ b> A of the lower cover 2 and the peripheral lower end 3 </ b> A of the upper cover 3. Further, the seal member 5 is formed of an elastic material such as rubber, for example, except for a core portion 24 (see FIG. 3) described later.

  As shown in FIG. 3, the seal member 5 has predetermined dimensions in the vertical direction (up and down direction in FIG. 3) and the horizontal direction (left and right direction in FIG. 3), and is formed in a ring shape as a whole. A seal member main body 21 is provided. As shown in FIG. 2, the peripheral upper end 2 </ b> A of the lower cover 2 extends in a substantially vertical direction above the lower cover 2 after its outer surface extends in a substantially horizontal direction inside the lower cover 2 over the entire circumference of the lower cover 2. . As a result, as shown in FIG. 4, the seal member placement having the first surface 11 </ b> A extending in the substantially vertical direction and the second surface 11 </ b> B extending in the substantially horizontal direction is provided on the peripheral upper end 2 </ b> A of the lower cover 2. A step portion 11 is formed. The seal member main body 21 of the seal member 5 is provided on the seal member mounting step portion 11. The inner peripheral side surface 21 </ b> A of the seal member main body 21 is in contact with the first surface 11 </ b> A of the seal member mounting step portion 11.

  An attachment portion 22 for attaching the seal member main body 21 to the peripheral upper end 2A of the lower cover 2 is formed on the inner peripheral side of the seal member main body 21. The attachment portion 22 extends substantially inward in the horizontal direction from the upper part of the seal member main body 21 and then extends downward in the substantially vertical direction. Further, the attachment portion 22 extends in the circumferential direction over the entire circumference of the seal member main body 21. As shown in FIG. 4, the attachment portion 22 holds the seal member main body 21 to the peripheral upper end 2 </ b> A of the lower cover 2 by holding the peripheral upper end 2 </ b> A of the lower cover 2 from above. Further, two holding portions 23 are formed on the attachment portion 22. Each holding portion 23 extends in a substantially horizontal direction from the side surface of the attachment portion 22, and extends in the circumferential direction over the entire circumference of the attachment portion 22. And each holding | maintenance part 23 is fixing the seal member main body 21 to 2 A of peripheral edge upper parts of the lower cover 2 by contact | abutting in the state which elastically deformed to the inner peripheral side surface of 2 A of peripheral edge upper parts of the lower cover 2. FIG.

  According to the attachment portion 22 and each holding portion 23, the seal member 5 can be fixed to the upper edge 2A of the peripheral edge of the lower cover 2, so that the attachability of the upper cover 3 to the lower cover 2 is improved and the upper cover 3 to the lower cover 2 is improved. It is possible to improve the positioning accuracy of the mounting position and to securely seal between the lower cover 2 and the upper cover 3.

  A core portion 24 is provided inside the seal member main body 21 and the attachment portion 22. The core portion 24 is formed in a substantially U shape or a substantially U shape by a metal material or the like, and is formed in a ring shape as a whole. The core portion 24 has a function of maintaining the ring shape of the entire seal member 5.

  A first support portion 25 that supports the upper cover 3 in a direction perpendicular to the lower cover 2 is formed at the lower portion of the outer peripheral side surface 21 </ b> B of the seal member main body 21. The first support portion 25 extends substantially horizontally from the outer peripheral side surface 21 </ b> B of the seal member main body 21 to the outside of the seal member main body 21. Specifically, as shown in FIG. 4, in the first support portion 25, the outer peripheral side surface 25 </ b> A of the first support portion 25 is attached on the outer peripheral side surface 2 </ b> B at the upper peripheral edge of the lower cover 2 or on the lower cover 2. The upper cover 3 extends in the substantially horizontal direction outside the seal member main body 21 until it substantially coincides with the outer peripheral side surface 3B at the lower peripheral edge in the horizontal direction. Further, the first support portion 25 extends in the circumferential direction over the entire circumference of the seal member main body 21.

  The lower surface 25 </ b> B of the first support portion 25 is in contact with the second surface 11 </ b> B of the seal member mounting step portion 11. On the other hand, the upper surface 25 </ b> C of the first support portion 25 comes into contact with the lower end surface 3 </ b> C of the peripheral lower end 3 </ b> A of the upper cover 3 when the upper cover 3 is attached on the lower cover 2. As described above, when the upper cover 3 is mounted on the lower cover 2, the first support portion 3 receives the upper cover 3 on the lower cover 2 and supports the upper cover 3 in the vertical direction.

  The first support portion 25 has a predetermined thickness (dimension in the vertical direction) D1. Further, as described above, when the upper cover 3 is attached on the lower cover 2, the first support portion 25 is connected to the second surface 11 </ b> B of the seal member mounting step portion 11 formed on the lower cover 2 and the upper cover. 3 is sandwiched between the lower end surface 3C of the peripheral lower end 3A, but is not greatly elastically deformed. Thereby, when the upper cover 3 is attached on the lower cover 2, the attachment position in the vertical direction of the upper cover 3 on the lower cover 2 is positioned at an appropriate position planned at the time of design. As shown in FIG. 3, some irregularities are formed on the lower surface 25 </ b> B of the first support portion 25, and these irregularities are illustrated when the upper cover 3 is attached on the lower cover 2. As shown in FIG. 4, it is elastically deformed, whereby the lower surface 25B becomes substantially flat.

  On the other hand, on the outer peripheral side surface 21 </ b> B of the seal member main body 21, a second support portion 26 that supports the upper cover 3 in the horizontal direction with respect to the lower cover 2 is formed above the first support portion 25. The second support portion 26 extends substantially horizontally from the outer peripheral side surface 21 </ b> B of the seal member main body 21 to the outside of the seal member main body 21. Specifically, as shown in FIG. 4, the second support portion 26 is configured such that the outer peripheral side surface 26 </ b> A of the second support portion 26 is the outer peripheral side surface of the lower peripheral edge of the upper cover 3 attached on the lower cover 2. It extends in the horizontal direction from 3B to a position separated inward in the horizontal direction by a distance corresponding to the thickness D2 of the side wall at the lower peripheral edge or lower peripheral edge 3A of the upper cover 3. Further, the second support portion 26 extends in the circumferential direction over the entire circumference of the seal member main body 21.

  When the upper cover 3 is mounted on the lower cover 2, the outer peripheral side surface 26 </ b> A of the second support portion 26 contacts the inner peripheral side surface 3 </ b> D of the peripheral lower end 3 </ b> A of the upper cover 3. Support the lower cover 2 in the horizontal direction.

  The horizontal dimension D3 from the inner peripheral side surface 21A of the seal member main body 21 to the outer peripheral side surface 26A of the second support portion 26 is set to a predetermined value. When the upper cover 3 is mounted on the lower cover 2, the second support portion 26 includes the first surface 11 </ b> A of the seal member mounting step portion 11 formed on the lower cover 2 and the lower peripheral edge of the upper cover 3. Although it is sandwiched between the inner peripheral side surface 3D of 3A, it is not elastically deformed greatly. Thereby, when the upper cover 3 is attached on the lower cover 2, the attachment position in the horizontal direction of the upper cover 3 on the lower cover 2 is positioned at an appropriate position planned at the time of design.

  Here, in the seal member 5, the first support portion 25 and the second support portion 26 are formed integrally and continuously with each other without a gap therebetween in the vertical direction, as shown in FIG. 4. The upper surface 25C of the first support portion 25 and the outer peripheral side surface 26A of the second support portion 26 are in contact with each other. Thus, by integrally forming the first support part 25 and the second support part 26, the rigidity of the first support part 25 and the second support part 26 can be increased. Thereby, the upper cover 3 can be firmly supported by the first support portion 25 and the second support portion 26, and the mounting position of the upper cover 3 with respect to the lower cover 2 can be reliably positioned at an appropriate position. .

  On the other hand, a seal portion 27 that seals between the upper cover 3 and the lower cover 2 over the entire circumference is formed above the second support portion 26 on the outer peripheral side surface 21B of the seal member main body 21. The seal portion 27 extends in a substantially horizontal direction from the outer peripheral side surface 21B of the seal member main body 21 to the outside of the seal member main body 21. When the upper cover 3 is attached on the lower cover 2, the outer peripheral side surface 27A is the upper cover 3 It contacts with the inner peripheral side surface 3D of the peripheral lower end 3A in an elastically deformed state. Specifically, as shown in FIG. 3, the outer peripheral side surface 27 </ b> A of the seal portion 27 extends to a position exceeding the outer peripheral side surface 26 </ b> A of the second support portion 26 in the horizontal direction. However, when the upper cover 3 is attached on the lower cover 2, the outer peripheral side surface 27A of the seal portion 27 is pushed by the inner peripheral side surface 3D of the peripheral lower end portion 3A of the upper cover 3, and the seal portion 27 is shown in FIG. It is elastically deformed so as to be crushed in the horizontal direction. As a result, the outer peripheral side surface 27A of the seal portion 27 is in contact with, or is in close contact with, the inner peripheral side surface 3D while pressing the inner peripheral side surface 3D of the peripheral lower end 3A of the upper cover 3. As a result, the space between the outer peripheral side surface 27A of the seal portion 27 and the inner peripheral side surface 3D of the peripheral lower end portion 3A of the upper cover 3 is sealed. Further, the seal portion 27 is formed over the entire circumference of the seal member main body 21, and the sealing performance by the seal portion 27 is exhibited over the entire circumference of the lower cover 2 and the upper cover 3.

  Here, the upper cover 2 is mounted on the lower cover 3, and the lower end surface 3C and the inner peripheral side surface 3D of the peripheral lower end 3A of the upper cover 3 are in contact with the first support portion 25 and the second support portion 26, respectively. In this state, the seal portion 27 is elastically deformed within an appropriate range in which the seal portion 27 can exhibit an appropriate sealing property. For example, when the seal part 27 is elastically deformed, the dimension in the horizontal direction of the seal part 27 is reduced by about 15% of the dimension in the horizontal direction of the seal part 27 that is not elastically deformed.

  Moreover, the hole 28 extended in the circumferential direction is formed in the seal part 27 over the perimeter, and, thereby, the inside of the seal part 27 is hollow. With such a structure, the seal portion 27 can be easily elastically deformed by applying a small force as compared with the first support portion 25 and the second support portion 26.

  As described above, according to the seal member 5 for an outboard motor according to the embodiment of the present invention, the first support portion 25 and the second support portion 26 are connected to the lower end surface 3C and the inner end of the lower end portion 3A of the peripheral edge of the upper cover 3. By attaching the circumferential side surface 3D to each other, the mounting position of the upper cover 3 with respect to the lower cover 2 can be positioned at an appropriate position both in the vertical direction and in the horizontal direction. Thereby, the range of the elastic deformation of the seal portion 27 can be maintained in an appropriate range, and a reliable sealing performance between the lower cover 2 and the upper cover 3 by the seal portion 27 can be ensured. Therefore, as described in Patent Document 1 or 2, in order to position the upper cover 3 with respect to the lower cover 2, it is not necessary to form a recess or a step in the lower peripheral edge 3A of the upper cover 3 or the like. Therefore, since it is not necessary to change the thickness of the peripheral lower end 3A and the like of the upper cover 3, the sink does not occur in the peripheral lower end 3A and the like of the upper cover 3. Therefore, the appearance of the outboard motor 1 can be improved. Moreover, since it is not necessary to form a recessed part and a step part in the peripheral lower end part 3A etc. of the upper cover 3, the freedom degree of design of the upper cover 3 etc. can be raised. Furthermore, since it is not necessary to separately provide an engaging member for positioning the upper cover 3 with respect to the lower cover 2 in an appropriate position, the outboard motor 1 can be reduced in weight, reduced in size, and secured in the cover. Can do.

  In the above-described embodiment, the case where the seal portion 27 has a structure that is relatively elastically deformable by providing the hole 28 in the seal portion 27 is described as an example. However, in the present invention, the shape of the seal portion is the same. Not exclusively. For example, on the outer peripheral side surface 21B of the seal member main body 21, a protrusion that extends outward in the horizontal direction and has a small thickness and can be easily bent may be formed as a seal portion. A plurality of seal portions may be formed in the vertical direction on the outer peripheral side surface 21B of the seal member main body 21.

  In the above-described embodiment, the case where the attachment portion 22 for fixing the seal member 5 to the peripheral upper end portion 2A is provided by holding the peripheral upper end portion 2A of the lower cover 2 from above is described as an example. The method of fixing 5 to the peripheral upper end 2A is not limited to this. For example, a method of fixing the seal member 5 to the peripheral upper end 2A using an adhesive can also be employed.

  Further, the present invention can be appropriately changed without departing from the gist or the idea of the invention which can be read from the claims and the entire specification, and an outboard motor seal member with such a change is also included in the present invention. It is included in the technical idea.

DESCRIPTION OF SYMBOLS 1 Outboard motor 2 Lower cover 2A Perimeter upper end part 3 Upper cover 3A Perimeter lower end part 3C Lower end surface 3D Inner side surface 11 Seal member mounting step part 11A First surface 11B Second surface 21 Seal member main body 21A Inner side Side surface 21B Outer peripheral side surface 22 Mounting portion 25 First support portion 25A Outer peripheral side surface 25B Lower surface 25C Upper surface 26 Second support portion 26A Outer peripheral side surface 27 Seal portion 27A Outer peripheral side surface

Claims (3)

For an outboard motor that is provided between a lower cover that forms an outer shell of the outboard motor and that is open on the upper side and an upper cover that closes the upper side of the lower cover, and seals the entire circumference between the lower cover and the upper cover. A sealing member,
A seal member mounting step portion formed by extending the outer surface of the upper edge of the lower cover substantially horizontally inward of the lower cover over the entire circumference of the lower cover and then extending substantially vertically above the lower cover. A seal member main body formed in a ring shape with an elastic material, and an inner peripheral side surface is in contact with a first surface extending in a substantially vertical direction of the seal member mounting step portion;
Extending substantially horizontally from the lower part of the outer peripheral side surface of the seal member body to the outside of the seal member body over the entire circumference of the seal member body, and the bottom surface extending substantially horizontally of the seal member mounting step. A first support portion that supports the upper cover in a direction perpendicular to the lower cover by abutting against the surface of the upper cover and an upper surface abutting against a lower end surface of a lower end portion of the peripheral edge of the upper cover;
On the outer peripheral side surface of the seal member main body, it extends substantially horizontally from the upper side of the seal member main body to the outside of the seal member main body from the upper side of the first support portion, and the outer peripheral side surface is the peripheral edge of the upper cover. A second support portion that supports the upper cover in a horizontal direction with respect to the lower cover by contacting the inner peripheral side surface of the lower end portion;
On the outer peripheral side surface of the seal member main body, it extends substantially horizontally from the upper side of the seal member main body to the outside of the seal member main body from the upper side of the second support portion, and the outer peripheral side surface is the peripheral edge of the upper cover. A seal member for an outboard motor comprising a seal portion that seals between the upper cover and the lower cover by abutting on the inner peripheral side surface of the lower end portion in a state of being elastically deformed.   The first support part and the second support part are continuously formed without a gap therebetween, and the upper surface of the first support part and the outer peripheral side surface of the second support part are The outboard motor seal member according to claim 1, wherein the seal members are in contact with each other. An attachment portion is provided on the inner peripheral side of the seal member main body, and attaches and fixes the seal member main body to the upper peripheral edge of the lower cover by sandwiching the upper peripheral edge of the lower cover from above. The seal member for an outboard motor according to claim 1 or 2.

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