JP2005329828A - Part mounting structure for outboard motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outboard motor capable of suppressing increase of weight due to a part mounting seat when a clamp bracket and a swivel bracket are manufactured by high pressure die casting. <P>SOLUTION: The clamp brackets 5, 6 and the swivel bracket 7 are manufactured by vacuum die casting and a bolt screw hole 39c is formed on a push-out pin seat 39b pressed by push-out pins of the clamp brackets 5, 6. A bolt 89 for mounting a part is thread-inserted to the screw hole 39c and connection terminals 88a, 88b of a lead wire 88 are fixedly connected to the push-out pin seat 39b by the bolt 89. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an outboard motor comprising a clamp bracket fixed to the stern, a swivel bracket supported by the clamp bracket so as to be swingable up and down, and an outboard motor main body supported by the swivel bracket so as to be steerable. Specifically, the present invention relates to a component mounting structure for mounting a lead wire, an exterior cover, a motor cover, or the like, which is a component part of an outboard motor.

  In general, an outboard motor mounted on a small ship or the like has a structure in which a swivel bracket is supported so as to be able to swing up and down by a clamp bracket fixed to the stern, and the outboard motor main body is supported by the swivel bracket so as to be steerable. (For example, refer to Patent Document 1).

  In this type of outboard motor, there is a high possibility that aluminum alloy clamp brackets and swivel brackets are electrolytically corroded by seawater, and therefore a structure for preventing this is required. For example, there is a case where the anode is mechanically and electrically connected and fixed to one bracket, and both brackets are electrically connected by lead wires in order to spread the effect to the other bracket. In the outboard motor, the appearance of the clamp bracket and swivel bracket may be improved and the bracket or the electric motor may be covered with a cover in order to avoid damage due to external force.

  When mounting such parts as lead wires and covers, mounting seats are formed on the clamp bracket and swivel bracket, and bolts are fixed to the mounting seats. In this case, from the viewpoint of securing the required strength of the mounting seat, the mounting seat is generally formed into a thick boss shape.

Moreover, when manufacturing parts by casting which supplies a molten metal in a casting_mold | template, it is common to provide the extrusion pin seat pressed with an extrusion pin (for example, refer patent document 2).
JP 11-310194 A Japanese Patent Publication No. 56-026497

  However, when the above-mentioned thick boss-shaped component mounting seat is formed on the clamp bracket and swivel bracket, there is a problem that the weight increases. In particular, when manufacturing a clamp bracket etc. by vacuum die cast casting that supplies molten metal while holding the inside of the mold in a negative pressure state, when this clamp bracket etc. is thinned as a whole to reduce weight, In forming the component mounting seat, it is necessary to take measures to prevent the weight reduction from being disturbed.

  The present invention has been made in view of the above-described conventional situation, and an object thereof is to provide an outboard motor capable of suppressing an increase in weight due to a component mounting seat when a clamp bracket and a swivel bracket are manufactured by casting. .

  The invention of claim 1 includes a clamp bracket fixed to the stern, a swivel bracket supported by the clamp bracket so as to be swingable up and down, and an outboard motor main body supported by the swivel bracket so as to be steerable. In the outboard motor, the clamp bracket and the swivel bracket are cast by supplying a molten metal into the mold, and include an extrusion pin seat pressed by an extrusion pin. A mounting hole for mounting the part is formed.

  The invention of claim 2 is characterized in that, in claim 1, the extrusion pin seat is formed so as to be flush with an end surface of a lower pin support portion formed in a cylindrical shape at a lower end portion of the clamp bracket. Yes.

  According to a third aspect of the present invention, in the first or second aspect, the component is a lead wire, and the lead wire is a clamp bracket on the side where an anode for preventing the electrolytic corrosion of the clamp bracket is provided. And the clamp bracket on the side where the anode is not disposed are electrically connected to make the same potential, and by connecting a bolt into the mounting hole, the connection terminal of the lead wire is It is characterized by being connected and fixed to the push pin seat.

  According to a fourth aspect of the present invention, in the first or second aspect, the part is an exterior cover that covers the clamp bracket from the outside, and the exterior cover is attached to the push pin seat by screwing a bolt into the mounting hole. It is characterized by being attached and fixed.

  A fifth aspect of the present invention is the motor cover according to the first or second aspect, wherein the component is a motor cover disposed on the clamp bracket so as to cover an electric motor of a swing drive mechanism that swings the swivel bracket. The motor cover is fixedly attached to the push-out pin seat of the clamp bracket by screwing it into the mounting hole.

  In the invention of claim 1, since the mounting hole for component attachment is formed in the extrusion pin seat pressed by the extrusion pin, and the component is attached to the extrusion pin seat, a dedicated component attachment seat can be dispensed with, The problem of weight increase can be avoided. That is, the cast product is provided with a thick extruded pin seat for extruding the cast product from the mold with an extruding pin, and the thick extruded pin seat is effectively used as a component mounting seat. It is not necessary to newly add a component mounting seat, and the problem of weight increase can be avoided.

  In the invention of claim 2, since the push pin seat is formed so as to be flush with the end face of the portion having high rigidity because it has a cylindrical shape called a lower pin support portion, the rigidity of the component mounting portion can be increased. Even such parts can be installed without hindrance.

  In the invention of claim 3, since the lead wire for electrically connecting the one clamp bracket provided with the anode and the other clamp bracket is bolted to the push pin seat, the push pin seat is effectively utilized. Thus, a lead wire can be attached, a dedicated component mounting seat can be dispensed with, and the same effect as in the first aspect can be obtained.

  In the invention of claim 4, since the exterior cover that covers the clamp bracket is bolted and fixed to the push pin seat, a dedicated component mounting seat can be eliminated, and the same effect as in claim 1 can be obtained.

  In the fifth aspect of the invention, the motor cover that covers the electric motor that swings and drives the swivel bracket is bolted and fixed to the push pin seat, so that a dedicated component mounting seat can be eliminated, and the same effect as in the first aspect can be obtained. can get.

  Embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 6 are views for explaining an outboard motor according to an embodiment of the present invention. FIG. 1 is a side view of the outboard motor mounted on the stern. FIG. 2 is a perspective view of a bracket unit. 3 is a partially sectional front view of the bracket unit, FIG. 4 is a side view of the clamp bracket, FIG. 5 is a side view of the push pin seat of the clamp bracket, and FIG. 6 is a cross sectional view of the push pin seat (VI-VI in FIG. 5). FIG. Note that front and rear and left and right in this embodiment mean front and rear and left and right when viewed from the front of the hull.

  In the figure, reference numeral 1 denotes an outboard motor mounted on the stern 2 of a small vessel. The outboard motor main body 4 of the outboard motor 1 is supported by the stern 2 by a bracket unit 3. The bracket unit 3 includes a pair of left and right clamp brackets 5 and 6 fixed to the transom plate 2a of the stern 2 and a tilt shaft 8 installed between the left and right clamp brackets 5 and 6 and a swing axis A. And a swivel bracket 7 supported so as to swing up and down. The swivel bracket 7 supports the outboard motor main body 4 via the shaft portion of the steering 9 so as to be steerable around the steering axis B. Yes.

  The outboard motor main body 4 is connected to an upper case 12 having a drive shaft (not shown) on a lower case 11 on which a propulsion device 10 having a propeller 10a is disposed, and an exhaust guide (not shown) is connected to the upper case 12. The engine is mounted and the outer periphery of the engine is surrounded by a cowling 14. The outboard motor 1 obtains propulsive force by transmitting the rotational force of the engine to the propeller 10a of the propulsion device 10 via a drive shaft.

  The exhaust guide is supported on the upper end portion of the shaft portion of the steering 9 with the upper mount member 16 interposed therebetween, and the upper case 12 is supported on the lower end portion with the lower mount member 17 interposed therebetween. A steering handle mounting portion 9 a extending forward is integrally formed at the upper end portion of the shaft portion of the steering 9.

  As shown in FIG. 3, the bracket unit 3 is provided with a swing drive mechanism 19. The swing drive mechanism 19 includes a cylinder mechanism 22 connected to an upper pin 20 supported by the upper end portion of the swivel bracket 7 and a lower pin 21 supported by the lower end portions of the left and right clamp brackets 5 and 6; And a hydraulic mechanism 40 for supplying hydraulic oil to the cylinder mechanism 22.

  The outboard motor body 4 is moved by the swing drive mechanism 19 through the swivel bracket 7 at the time of traveling where the propeller 10a is located underwater, and at the time of non-cruising where the propeller 10a is located above the water surface (tilt). (Up position).

  The cylinder mechanism 22 slidably disposes a piston (not shown) in a cylinder 23 disposed so as to be located in the center of the swivel bracket 7 in the ship width direction, and a piston rod 24 is connected to the piston. The piston rod 24 is oil-tightly projected from the upper end of the cylinder 23. The upper end of the piston rod 24 is connected to the upper pin 20, and the lower end of the cylinder 23 is connected to the lower pin 21.

  The hydraulic mechanism 40 includes a hydraulic pump 41 that is connected to the cylinder 23 and supplies hydraulic pressure into the cylinder 23, and a pump drive motor 42 that drives the hydraulic pump 41. The drive motor 42 protrudes outward in the ship width direction through an opening (not shown) formed in the left clamp bracket 5.

  A motor cover 44 that covers the drive motor 42 is disposed in the opening of the left clamp bracket 5, and the motor cover 44 is bolted to the clamp bracket 5.

  The left and right clamp brackets 5 and 6 and the swivel bracket 7 supply a molten aluminum alloy into the cavities while vacuum-sucking the mold having cavities corresponding to each of the clamp brackets 5 and 6 and the swivel bracket 7 while maintaining a negative pressure. It is a vacuum die cast product manufactured by

  The swivel bracket 7 includes a cylindrical steering tube portion 50 that supports the outboard motor main body 4 so as to be steerable, a vertical side portion 51 that is disposed along both sides of the steering tube portion 50 in the ship width direction, The front side 53a has a top side 53 that is bent and extended forward from the upper end of the vertical side 51 and is supported by the left and right clamp brackets 5 and 6 in a swingable manner. The shaft portion of the steering 9 is inserted into the steering cylinder portion 50 and is rotatably supported via a bearing (not shown).

  The left and right clamp brackets 5, 6 extend the vertical side portion 25 fixed to the transom plate 2 a, and bends forward from the upper end of the vertical side portion 25 so as to swing the swivel bracket 7 up and down at the front portion 27 a. An upper side portion 27 that is movably supported is provided, and a portion extending from an upper portion of the vertical side portion 25 to a rear portion of the upper side portion 27 is a bent portion 26.

  A tilt boss portion 27b is formed in the front portion 27a of the upper side portion 27, the cylindrical tilt shaft 8 is inserted between the left and right tilt boss portions 27b, 27b, and both ends thereof are fastened and fixed by nuts 8a. ing.

  The portions of the left and right clamp brackets 5 and 6 extending from the vertical side portion 25 to the bent portion 26 and further to the upper side portion 27 extend along the inner periphery of the band plate-like outer peripheral film portion 30 arranged along the outer periphery thereof. A film-beam-membrane structure comprising a strip-like inner peripheral membrane portion 31 and a plate-like beam portion 32 that connects the inner peripheral membrane portion 31 and the outer peripheral membrane portion 30 to each other. Yes. The outer peripheral film portion 30, the inner peripheral film portion 31, and the beam portion 32 are set to have a thickness of about 1.5 to 5 mm.

  The film surfaces of the outer peripheral film portion 30 and the inner peripheral film portion 31 are parallel to the swing axis A of the swivel bracket 7, and the beam surface of the beam portion 32 extends in a direction perpendicular to the swing axis A. ing. In this way, the clamp bracket 6 is generally I-shaped when viewed in cross section.

  A plurality of pin holes 32 a are arranged side by side along the swing locus of the outboard motor body 4 in the beam portion 32 of the vertical side portion 25. A tilt position restricting member 34 is inserted into any one of the pin holes 32a. Then, the stopper 65 formed on the swivel bracket 7 abuts against the tilt position restricting member 34, so that the tilt down position of the outboard motor body 4 is restricted.

  An arcuate recess 31c is formed in a portion of the inner peripheral film portion 31 of the bent portion 26 corresponding to the corner of the transom plate 2a. A plurality of ribs 35 are integrally formed on the beam portion 32 extending from the bent portion 26 to the upper side portion 27 so as to form a radial shape centering on the concave portion 31c. The ribs 35 connect the concave portion 31 c and the outer peripheral film portion 30. In addition, arc-shaped film ribs 36 for connecting the ribs 35 are integrally formed on the beam part 32 of the bent part 26, and the film surface of the film ribs 36 is parallel to the swing axis A.

  A strip-like intermediate film portion 38 is formed between the outer peripheral film portion 30 and the inner peripheral film portion 31 of the bent portion 26. The intermediate film portion 38 is disposed closer to the inner peripheral film surface portion 31 than the outer peripheral film portion 30, and the film surface of the intermediate film portion 38 is parallel to the swing axis A. The intermediate film portion 38 is formed so as to be substantially concentric with the concave portion 31c, and is connected to the inner peripheral film portion 31 while connecting the ribs 35 to each other.

  A cylindrical lower pin support portion 39 that supports the lower pin 21 is formed at the lower ends of the clamp brackets 5 and 6. The lower pin support portion 39 is disposed so as to be deviated toward the swivel bracket side (inside), and is positioned below the pin beam portion 32b inclined to the swivel bracket side of the beam portion 32, and the axis thereof is the beam portion 32. It is formed to be orthogonal to.

  The left and right clamp brackets 5 and 6 are each formed using a mold having a movable mold and a fixed mold that are opened and closed in the direction of the swing axis A. This mold includes a casting extrusion pin (not shown) for releasing the clamp brackets 5 and 6 from the mold when the clamp brackets 5 and 6 are manufactured by vacuum die casting. . The brackets 5 and 6 are pushed out of the mold by pressing the push pin seats 39b of the clamp brackets 5 and 6 with the push pins.

  In the outer peripheral portion of the lower pin support portion 39 of the left and right clamp brackets 5 and 6, three of the above-described push pin seats 39b pressed by the push pin are formed in the circumferential direction. The push pin seat is also formed in other appropriate portions.

  Here, since the said lower pin support part 39 is a site | part which a big load act | operates, it is formed in the cylinder shape and is thick. The push pin seat 39b is formed in the vicinity of the high-rigidity lower pin support portion 39 so as to be flush with the end face 39 '. Accordingly, the push pin seat 39b is also highly rigid.

  As shown in FIG. 1, the lower case 11 is provided with an anode 85 for preventing the lower case 11 from being electrolytically corroded by seawater. The anode 85 is made of aluminum or zinc, and is electrically and mechanically connected and fixed to the lower case 11.

  An extrusion pin seat 50 a is formed on the side surface of the pivot cylinder portion 50 of the swivel bracket 7. A part mounting hole is formed in the push pin seat 50a, and one connection terminal 86a of the lead wire 86 is electrically connected and fixed to the mounting hole. The other connection terminal 86 b of the lead wire 86 is electrically connected and fixed to the lower case 11. This prevents the swivel bracket 7 from being electrolytically corroded.

  An anode 87 similar to the above is electrically and mechanically connected and fixed to the lower end portion of the outer peripheral membrane portion 30 of the right clamp bracket 6. The right clamp bracket 6 on which the anode 87 is disposed and the left clamp bracket 5 on which the anode is not disposed are electrically connected via a lead wire 88 arranged between the two. As a result, the left and right clamp brackets 5 and 6 have the same potential.

  Of the three push pin seats 39b formed on the lower pin support portions 39 of the left and right clamp brackets 5 and 6, a bolt screw hole (part mounting hole) 39c is formed in the uppermost pin seat 39b '. . Bolts 89 for mounting components are screwed into the screw holes 39c, and the left and right connection terminals 88a and 88b of the lead wires 88 are pushed into the push pin seats 39b of the clamp brackets 5 and 6 by the bolts 89. It is fixedly connected to ′.

  Next, the effect of this embodiment is demonstrated.

  In this embodiment, since the left and right clamp brackets 5 and 6 and the swivel bracket 7 are manufactured by vacuum die casting, the basic shape is such that the thickness of the portion requiring strength is increased and the thickness of other portions is decreased. It is possible to increase the degree of freedom in design, such as adopting, so that the weight of the clamp brackets 5 and 6 and the swivel bracket 7 can be reduced.

  In the present embodiment, since each of the clamp brackets 5 and 6 is manufactured by vacuum die casting, a portion extending from the vertical side portion 25 to the bent portion 26 and the upper side portion 27 of each clamp bracket 5 and 6 extends along the outer periphery. A belt-shaped outer peripheral film portion 30 disposed; an inner peripheral film portion 31 disposed along the inner periphery; and a plate-shaped beam portion 32 connecting the inner peripheral film portion 31 and the outer peripheral film portion 30; A membrane-beam-membrane structure with Therefore, by appropriately setting the film thickness, the secondary moment of section at the same weight can be increased, and the rigidity and strength can be improved while reducing the weight.

  In this embodiment, a bolt screw hole 39c is formed in an extrusion pin seat 39b 'formed to press the left and right clamp brackets 5 and 6 from the mold with an extrusion pin, and is screwed into this. Since the connection terminals 88a and 88b of the lead wire 88 are connected and fixed by the bolts 89, a dedicated thick-walled component mounting seat can be dispensed with and the problem of weight increase can be avoided. That is, the extrusion pin seats 39b and 39b 'are for pushing the cast product with the extrusion pin and extruding it from the mold at the time of casting. Therefore, the extrusion pin seats 39b and 39b' originally have a certain thickness or size. By using the pin seats 39b and 39b ', the lead wire 88 can be connected and fixed easily and reliably without causing the problem of weight increase.

  Moreover, the push pin seat 39b of the present embodiment is formed in the vicinity of the highly rigid lower pin support portion 39 as described above, and the push pin seat 39b itself is also highly rigid. Therefore, any component can be attached without any trouble.

  Here, the connection terminals 88a and 88b of the lead wire 88 are connected to the left and right clamp brackets 5 and 6 in order to make the left and right brackets 5 and 6 have the same potential. No strict design requirements are required. Therefore, an extrusion pin seat 39b is provided at a most preferable position in casting, and the lead wire 88 may be connected using any of the extrusion pin seats 39b '. Therefore, connecting and fixing the lead wire 88 to the push pin seat 39b 'does not adversely affect the castability when the clamp brackets 5 and 6 are vacuum die cast.

  In the above embodiment, the case of a vacuum die cast product has been described. However, the present invention can also be applied to a cast product other than the above.

  In the above embodiment, the case where the connection terminals 88a and 88b of the lead wires 88 are connected and fixed to the push pin seats 39b 'of the left and right clamp brackets 5 and 6 has been described. When attaching to the clamp bracket 5, it may be bolted to the push pin seat of the clamp bracket 5. In addition, in order to improve the appearance of the clamp bracket and prevent damage from external force, an outer cover that covers the clamp bracket from the outside may be bolted and fixed to the push pin seat of the clamp bracket. When the component parts are bolted and fixed to the clamp bracket or swivel bracket, the same effect as that of the above embodiment can be obtained by effectively using the push pin seat.

1 is a side view of an outboard motor according to an embodiment of the present invention. It is a perspective view of the bracket unit which supports the said outboard motor. It is a partial cross section front view of the said bracket unit. It is a side view of the clamp bracket of the bracket unit. It is a side view of the extrusion pin seat of the said clamp bracket. It is sectional drawing (VI-VI sectional view taken on the line of FIG. 5) of the said extrusion pin seat.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outboard motor 2 Stern 4 Outboard motor main body 5,6 Clamp bracket 7 Swivel bracket 19 Swing drive mechanism 39b Extrusion pin seat 39c Bolt hole 42 Electric motor 44 Motor cover 87 Anode 88 Lead wire 88a, 88b Connection terminal 89 Bolt

Claims (5)

  An outboard motor comprising: a clamp bracket fixed to the stern; a swivel bracket supported by the clamp bracket so as to be swingable up and down; and an outboard motor body supported by the swivel bracket so as to be steerable. The bracket and the swivel bracket are cast by supplying molten metal into the mold, and are provided with an extrusion pin seat that is pressed by an extrusion pin, and the extrusion pin seat has mounting holes for mounting components. An outboard motor characterized by being formed.   2. The outboard motor according to claim 1, wherein the push pin seat is formed to be flush with an end surface of a lower pin support portion formed in a cylindrical shape at a lower end portion of the clamp bracket.   3. The lead wire according to claim 1, wherein the component is a lead wire, and the lead wire is provided with a clamp bracket and an anode on the side where the anode for preventing the electrolytic corrosion of the clamp bracket is provided. This is to electrically connect the clamp bracket on the other side to the same potential, and the lead wire connection terminal is connected and fixed to the push pin seat by screwing a bolt into the mounting hole. An outboard motor characterized by   In Claim 1 or 2, the said part is an exterior cover which covers the said clamp bracket from the outside, and this exterior cover is attached and fixed to the said extrusion pin seat by screwing a volt | bolt in the said attachment hole. A featured outboard motor.   3. The motor cover according to claim 1, wherein the component is a motor cover disposed on the clamp bracket so as to cover an electric motor of a swing drive mechanism that swings the swivel bracket, and a bolt is screwed into the mounting hole. Thus, the motor cover is mounted and fixed to the push pin seat of the clamp bracket.

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