JP2012025315A - Outboard motor mount device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outboard motor mount device with a sufficient vibration control function for surely preventing interference between an outboard motor body and a mounting device, for actualizing a further reduced weight and space saving.SOLUTION: The outboard motor mount device 13 disposed between the outboard motor body 11 provided with an engine and a mounting bracket device 12 for mounting the outboard motor body on a hull includes an upper mount 45 and an upper stopper 46. The outboard motor body 11 is provided with an engine holder 20 on which the engine is mounted. The mounting bracket device 12 has a steering bracket 38 which is provided with an upper mount bolt 48 extending into the engine holder 20. The upper mount 45 is installed on the upper mount bolt 48 and held on a mount storage part 47 of the engine holder 20, and configured to absorb the vibration of the engine. The upper stopper 46 is formed of an elastic material and mounted on the steering bracket 38, and configured to abut on a protruded part 59 of the engine holder 20.

Description

  The present invention relates to an outboard motor mounting device that is disposed between an outboard motor main body and a mounting device that attaches the outboard motor main body to a hull and has a vibration isolation function and a displacement regulation function.

  In general, in an outboard motor mounting device disposed between an outboard motor main body and a mounting device for attaching the outboard motor main body to the hull, mount units (upper mount units) are provided above and below the outboard motor main body. The lower mount unit) is disposed, and the vibration of the engine of the outboard motor main body is prevented from being transmitted to the hull by an elastic body such as rubber provided in the mount unit.

  In order to improve the above-described anti-vibration function of the mounting device, it is necessary to set the spring constant of the elastic body to be low, which makes it possible to absorb vibrations at a lower frequency. However, if the propulsive force of the outboard motor changes abruptly, or lift occurs in the outboard motor width direction (left-right direction) at the rudder angle, a large load is applied to the outboard motor body. Parts on the outer unit main body side (for example, an engine holder and a clutch rod) may interfere with parts on the mounting device side (for example, a steering bracket).

  Accordingly, the outboard motor mounting device is provided with a vibration isolation function for preventing engine vibration from being transmitted to the hull, and for preventing interference between the outboard motor side component and the mounting device side component. The displacement regulation function is required.

  By the way, in the outboard motor mounting device, in particular, the upper mount unit, the vibration center of the outboard motor main body is behind the drive shaft in the plan view of the outboard motor. The upper mount provided with is installed behind the drive shaft. That is, the upper mount is disposed at a position away from the steering bracket installed in front of the drive shaft.

  Further, when the outboard motor main body is displaced laterally by the above-mentioned lift, for example, the parts that interfere with this displacement (for example, the engine holder and the steering bracket, the clutch rod and the steering bracket, etc.) It exists in a position far away. Therefore, in order to prevent interference of these components, it is necessary to set the maximum displacement amount of the upper mount small, which is disadvantageous for the vibration isolation function.

  In Patent Document 1, in order to achieve both the above-described anti-vibration function and the displacement regulation function, an outboard motor main body is provided in addition to an upper mount (first upper mount) having an elastic body that performs the anti-vibration function. An outboard motor mounting device is disclosed that includes a displacement restricting stopper (displacement restricting upper mount) that restricts displacement in the front, rear, and width direction (left-right direction) of the outer motor.

JP 2006-31379 A (FIGS. 7 and 8)

  However, even in the outboard motor mounting apparatus described in Patent Document 1, the displacement regulating stopper is disposed in the vicinity of the upper mount and is not disposed in the vicinity of a component (for example, a steering bracket) that interferes with the displacement. In order to prevent component interference, the maximum displacement amount of the upper mount cannot be set large.

  Further, the displacement restricting stopper described in Patent Document 1 is provided with a mandrel. For this reason, this displacement restricting stopper becomes large, which hinders space saving and weight reduction.

  The object of the present invention has been made in consideration of the above-mentioned circumstances, and can reliably prevent interference between the outboard motor main body and the mounting device, and has a sufficient vibration isolation function, and is further reduced in weight and space. It is an object of the present invention to provide an outboard motor mounting apparatus capable of realizing

  The present invention is provided between an outboard motor main body that generates propulsive force by driving a propeller with a driving force of a mounted engine, and a mounting device that attaches the outboard motor main body to the hull. An outboard motor mounting device having a means and a displacement regulating means, wherein the outboard motor main body includes an engine holder for mounting the engine, and the mounting device includes an arm portion extending into the engine holder. The vibration isolating means is installed on the arm portion and held by the engine holder so as to absorb vibrations of the engine, and the displacement regulating means is constituted by an elastic body. Mounted on the support member, and configured to be able to contact at least a width direction of the outboard motor with a projecting portion formed on the engine holder toward the support member. .

  According to the present invention, in the outboard motor, there is a possibility that the components on the outboard motor main body side and the support member of the mounting device may interfere with each other. Since it is provided so as to be able to come into contact with the protruding portion of the engine holder of the outer unit main body, it is possible to reliably prevent interference between the support member of the mounting device and the components on the outboard motor main unit side. In addition, since the interference between the support member of the mounting device and the components on the outboard motor main body side can be reliably prevented in this way, the maximum displacement amount of the vibration isolating means held in the engine holder of the outboard motor main body is set large. And a sufficient anti-vibration function can be achieved. Furthermore, since the displacement restricting means is attached to the support member of the mounting device, no core metal is required for the displacement restricting means. For this reason, weight reduction and space saving of the outboard motor mounting device can be realized.

1 is a left side view showing an outboard motor to which an embodiment of an outboard motor mounting apparatus according to the present invention is applied. FIG. 2 is an enlarged side view showing a portion II of FIG. Sectional drawing which follows the III-III line | wire of FIG. The perspective view which shows the upper mount of FIG. The perspective view which shows the upper stopper of FIG. The perspective view which shows the deformation | transformation form of the upper stopper shown in FIG.

  The best mode for carrying out the present invention will be described below with reference to the drawings. However, the present invention is not limited to these embodiments. FIG. 1 is a left side view showing an outboard motor to which an embodiment of the outboard motor mounting apparatus according to the present invention is applied.

  As shown in FIG. 1, the outboard motor 10 drives the propeller 15 by the driving force of the mounted engine 14 to generate a propulsive force forward or outboard of the outboard motor. A mounting bracket device 12 as a mounting device that supports the outboard motor main body 11 and is attached to the transom 16A of the hull 16, and is disposed between the outboard motor main body 11 and the mounting bracket device 12, and is an upper mount unit. 17 and a lower mount unit 18.

  The outboard motor main body 11 includes an engine holder 20, and the engine 14 is mounted on the engine holder 20. An oil pan block 21 is disposed below the engine holder 20, a drive shaft housing 22 is installed below the oil pan block 21, and a gear case 23 is installed below the drive shaft housing 22. The engine 14, the engine holder 20, and the oil pan block 21 are covered with an engine cover 24.

  The engine 14 includes a crankcase 25, a cylinder block 26, and a cylinder head 27 that are sequentially arranged from the front of the outboard motor to the rear of the outboard motor. A cylinder (both not shown) in which a piston reciprocates is formed in the cylinder block 26 in a substantially horizontal direction, and a crankshaft 28 is disposed between the crankcase 25 and the cylinder block 26 in a substantially vertical direction.

  A drive shaft 29 is connected to the lower end portion of the crankshaft 28 of the engine 14 in the same straight line, for example, splined. The drive shaft 29 extends substantially vertically in the engine holder 20, the oil pan block 21, the drive shaft housing 22, and the gear case 23, and is connected to the propeller shaft 31 via a bevel gear 30 in the gear case 23. Thereby, the driving force of the engine 14 (that is, the rotational force of the crankshaft 28) is transmitted to the propeller 15 coupled to the propeller shaft 31 via the drive shaft 29, the bevel gear 30 and the propeller shaft 31.

  A shift device 32 that switches the rotation direction of the propeller shaft 31 to a normal rotation (forward), reverse rotation (reverse), or neutral (neutral) state by a remote operation is provided in the gear case 23. A shift rod 33 extends upward from the shift device 32, and a clutch rod 34 connected to the shift rod 33 passes through a steering shaft 37 described later and is operated from outside the outboard motor body 11.

  The mounting bracket device 12 includes a clamp bracket 35, a swivel bracket 36, a steering shaft 37, a steering bracket (upper mount bracket) 38, and a lower mount bracket 39. The clamp bracket 35 is provided so that the transom 16A of the hull 16 can be gripped. The swivel bracket 36 is supported by the clamp bracket 35 via the clamp bracket shaft 40 so as to be rotatable in the vertical direction.

  The steering shaft 37 extends in the vertical direction on the swivel bracket 36 and is rotatably provided. The steering bracket 38 as a support member that also functions as an upper mount bracket is coupled to the upper end of the steering shaft 37, and the lower mount bracket 39 is coupled to the lower end of the steering shaft 37 so as to rotate together. The outboard motor main body 11 is attached to the steering bracket 38 via the upper mount unit 17 and to the lower mount bracket 39 via the lower mount unit 18.

  As a result, the outboard motor main body 11 is pivotally supported so as to be pivotable in the left-right direction with respect to the clamp bracket 35 and swivel bracket 36 around the steering shaft 37, and the clamp bracket shaft 40 is centered together with the swivel bracket 36. The clamp bracket 35 is pivotally supported so as to be pivotable in the vertical direction (tilt operation and trim operation).

  The upper mount unit 17 constituting the mount device 13 will be described in detail later with reference to FIGS. 2 and 3, and is mainly installed at the front portion of the engine holder 20 and will be described in detail later with reference to FIGS. 2 and 3. Are coupled to the steering bracket 38 by upper mount bolts 48. Further, the lower mount units 18 constituting the mount device 13 are respectively provided on both sides of the drive shaft housing 22. Each lower mount unit 18 is connected to a lower mount bracket 39 by a lower mount bolt 43. Reference numeral 44 denotes a lower mount cover that covers the lower mount unit 18.

  The upper mount unit 17 and the lower mount unit 18 prevent the vibration of the engine 14 of the outboard motor main body 11 from being transmitted to the hull 16 (vibration isolation function), and the mounting bracket device for the outboard motor main body 11. Excessive displacement with respect to 12 is regulated (displacement regulating function).

  2 and 3, the upper mount unit 17 includes a pair of left and right upper mounts 45 as vibration isolation means provided in the width direction (left and right direction) of the outboard motor 10, and a steering bracket 38. And an upper stopper 46 as a displacement restricting means mounted directly on the head.

  The upper mount 45 has a substantially rectangular parallelepiped shape as shown in FIG. 4 and is housed and held in the mount housing portion 47 in the engine holder 20 of the outboard motor main body 11. The mount housing portion 47 is formed in the vicinity of the rear of the drive shaft 29 on the front half portion side of the engine holder 20.

  Each of the pair of upper mounts 45 is held by the mount accommodating portion 47 of the engine holder 20, and the base end side portion (bolt head side portion 49) of each of the pair of upper mount bolts 48 as the arm portions. It is inserted. The tip side portions of the pair of upper mount bolts 48 are inserted into the steering bracket 38, and a tightening nut 50 is screwed to the tips of the upper mount bolts 48, so that the upper mount bolt 48 is coupled to the steering bracket 38. As described above, the steering bracket 38 includes the upper mount bolt 48 extending into the mount housing portion 47 of the engine holder 20, and a portion through which the upper mount bolt 48 is inserted is the boss portion 51.

  As described above, the upper mount 45 which is fixedly installed on the base end side portion of the upper mount bolt 48 and is held by the mount housing portion 47 of the engine holder 20 is formed as shown in FIGS. A body 52 and a bulging body 53 are provided.

  The core body 52 is configured such that a cylindrical core body cylinder section 52B is integrated with a rectangular parallelepiped core body base section 52A, and a coating layer 54 made of a thin elastic body such as rubber is coated on the surface of the core body base section 52A. Is done. The core body base portion 52A and the core body cylinder portion 52B are made of metal (such as an aluminum alloy).

  In addition, the bulging bodies 53 are integrated with the coating layer 54 and bulge from positions corresponding to the respective corners of the core body base 52A to form, for example, eight pieces. The bulging body 53 is made of an elastic body such as rubber, and is set to a spring constant capable of absorbing vibration generated when the engine 14 is rotated at a low speed. The upper mount 45 is held by the mount housing portion 47 in a state where the bulging body 53 is in contact with the inner surface of the mount housing portion 47 in the engine holder 20.

  Therefore, the upper mount 45 absorbs the vibration of the engine 14 due to the deformation of the bulging body 53 and fulfills the vibration isolating function. Further, when a large load in the width direction of the outboard motor 10 is applied to the engine holder 20 of the outboard motor main body 11, the inner surface of the mount housing portion 47 of the engine holder 20 abuts against the side surface of the core body 52. When a large rearward load of the outboard motor 10 is applied to the engine holder 20 of the outer motor body 11, the stopper plate 55 fixed to the front surface of the engine holder 20 contacts the front surface of the core body 52. By these abutments, the upper mount 45 also fulfills a displacement regulating function for regulating displacement of the outboard motor main body 11 with respect to the mounting bracket device 12 (particularly the steering bracket 38).

  As shown in FIGS. 3 and 5, the upper stopper 46 is directly fitted and fitted to the rear end portion of the boss portion 51 of the steering bracket 38 and is made of an elastic body such as rubber. The elastic body of the upper stopper 46 is set to have a higher spring constant than the bulging portion 53 of the upper mount 45.

  The upper stopper 46 is formed by integrally forming fitting portions 57 having through holes 58 on both sides of the displacement restricting portion 56. The boss portion 51 of the steering bracket 38 is fitted into the through hole 58 of the fitting portion 57, and the upper stopper 46 is attached to the steering bracket 38. Further, the displacement restricting portion 56 is formed in a U shape in a plan view of the outboard motor 10. On the other hand, in the engine holder 20, a portion through which the drive shaft 29 is inserted protrudes to the front side of the outboard motor 10 (that is, the steering bracket 38 side), and a protruding portion 59 is formed. The projecting portion 59 is provided so as to project toward the steering bracket 38 to a position overlapping the rear end portion of the boss portion 51 of the steering bracket 38 in a side view of the outboard motor 10. The displacement restricting portion 56 of the upper stopper 46 faces the protruding portion 59 of the engine holder 20 with a predetermined gap T in a range from the front direction of the outboard motor 10 to the width direction (left-right direction).

As a result, the displacement restricting portion 56 of the upper stopper 46 includes a front portion 56 </ b> A that can come into contact with the protruding portion 59 of the engine holder 20 in the front direction of the outboard motor 10, and the engine holder 20 in the width direction of the outboard motor 10. The side portions 56B and 56C that can come into contact with the protruding portion 59 are continuously formed in a U shape as described above. The gap T is set between the front part 56 </ b> A, the side parts 56 </ b> B and 56 </ b> C of the displacement restricting part 56 and the protruding part 59 of the engine holder 20.
Next, the operation will be described.

  When lift in the outboard motor width direction (left-right direction) generated at the rudder angle acts on the outboard motor body 11, the engine holder 20 of the outboard motor body 11 is displaced in the outboard motor width direction, or the outboard motor body. 11 engine holders 20 are displaced in a direction rotating in a horizontal plane (so-called yaw direction) with respect to the mounting device 13 including the upper mount unit 17. When the lift in the outboard motor width direction is a heavy load, on the front side of the outboard motor 10, the displacement restricting portion 56 of the upper stopper 46 attached to the steering bracket 38 and the protruding portion 59 of the engine holder 20 And the coating layer 54 of the core body 52 of the upper mount 45 and the inner surface of the mount housing portion 47 of the engine holder 20 are in contact with each other on the rear side of the outboard motor 10, and the displacement in the outboard motor width direction described above is performed. Regulate displacement in the yaw direction.

  Further, when a large load thrust generated during sudden deceleration acts on the outboard motor main body 11, the engine holder 20 of the outboard motor main body 11 is displaced forward of the outboard motor. At this time, the front portion 56A of the displacement restricting portion 56 of the upper stopper 46 and the protruding portion 59 of the engine holder 20 come into contact with each other to restrict the forward displacement of the outboard motor body 11 described above.

  Further, when a large load thrust generated during sudden acceleration acts on the outboard motor main body 11, the engine holder 20 of the outboard motor main body 11 is displaced rearward. At this time, the stopper plate 55 fixed to the engine holder 20 and the coating layer 54 of the core body 52 of the upper mount 45 come into contact with each other, thereby restricting the rearward displacement of the outboard motor main body 11 described above.

  During normal operation in which a large load in the outboard motor width direction (left-right direction) and the front-rear direction is not applied to the outboard motor body 11, the displacement restricting portion 56 of the upper stopper 46 and the protruding portion 59 of the engine holder 20 are in contact with each other. Further, since the core body 52 of the upper mount 45 and the stopper plate 55 of the engine holder 20 are not in contact with each other, the bulging body 53 of the upper mount 45 is deformed within the maximum displacement amount. Therefore, the bulging body 53 of the upper mount 45 exhibits a sufficient anti-vibration function.

  With the configuration as described above, the following effects (1) to (3) are achieved according to the present embodiment.

  (1) In the outboard motor 10, there is a possibility that the components on the outboard motor main body 11 side and the mounting bracket device 12 may interfere with each other. An upper stopper 46 is attached. Since the upper stopper 46 is provided so as to be able to contact the protruding portion 59 of the engine holder 20 of the outboard motor main body 11, the steering bracket 38 of the mounting bracket device 12 and the components on the outboard motor main body 11 side ( For example, interference with the engine holder 20, the clutch rod 34, etc.) can be reliably prevented.

  (2) Since the interference between the steering bracket 38 of the mounting bracket device 12 and the components on the outboard motor main body 11 (for example, the engine holder 20, the clutch rod 34, etc.) can be reliably prevented, the engine holder 20 of the outboard motor main body 11 can be prevented. The maximum displacement amount of the bulging portion 53 of the upper mount 45 held in the mount housing portion 47 can be set large. For this reason, the mounting device 13 of the outboard motor 10 can fulfill a sufficient vibration isolating function.

  (3) Since the upper stopper 46 is directly mounted on the steering bracket 38 of the mounting bracket device 12, no mandrel is required for the upper stopper 46. For this reason, weight reduction, cost reduction, and space saving of the mounting device 13 of the outboard motor 10 can be realized.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this.

  For example, the upper stopper 46 fitted and attached to the steering bracket 38 may be changed to an upper stopper 60 shown in FIG. In the upper stopper 60, a slit 62 reaching the through hole 58 is formed in the upper part or the lower part (lower part in the present modification) of the fitting part 61 fitted to the steering bracket 38. Accordingly, when the upper stopper 60 is deteriorated and needs to be replaced, for example, it is not necessary to remove the upper mount bolt 48, and the boss portion 51 of the steering bracket 38 is inserted into the slit 62 to elastically deform the upper stopper 60. Thus, the upper stopper 60 can be detached from the boss portion 51 of the steering bracket 38.

  The upper stopper 46 is described as being fitted to the boss 51 of the steering bracket 38. However, the fitting stopper 57 is deleted and the U-shaped displacement restricting portion 56 is adhered to the steering bracket 38. But you can. Further, the displacement restricting portion 56 of the upper stopper 46 has been described in which the front portion 56A and the side portions 56B and 56C are continuously formed in a U-shape, but the side portions 56B and 56C are integrated with the fitting portion 57. The fitting portion 57 may be fitted to the boss portion 51 of the steering bracket 38, and the front portion 56A may be bonded to the steering bracket 38 as a separate side portion 56B and 56C.

DESCRIPTION OF SYMBOLS 10 Outboard motor 11 Outboard motor main body 13 Mount apparatus 14 Engine 15 Propeller 16 Hull 17 Upper mount unit 20 Engine holder 38 Steering bracket (support member)
45 Upper mount (anti-vibration means)
46 Upper stopper (displacement restricting means)
47 Mount receiving part 48 Upper mount bolt (arm part)
51 Boss part 56 Displacement restricting part 56A Front part 56B, 56C Side part 57 Fitting part 59 Projection part 60 Upper stopper 61 Fitting part 62 Slit

Claims (5)

An anti-vibration means and a displacement restriction are arranged between an outboard motor main body that generates propulsive force by driving a propeller by a driving force of the mounted engine, and a mounting device that attaches the outboard motor main body to the hull. An outboard motor mounting device having means,
The outboard motor main body includes an engine holder on which the engine is mounted, and the attachment device includes a support member including an arm portion extending into the engine holder,
The vibration isolating means is configured to be installed on the arm portion and held by the engine holder so as to absorb vibrations of the engine,
The displacement restricting means is formed of an elastic body and is attached to the support member, and is configured to be able to contact at least a width direction of the outboard motor with a projecting portion formed on the engine holder toward the support member. An outboard motor mounting device. The displacement restricting means includes a portion that can contact the protruding portion of the engine holder in the width direction of the outboard motor and a portion that can contact the protruding portion of the engine holder in the front direction of the outboard motor. 2. The outboard motor mounting device according to claim 1, wherein the outboard motor is formed in a substantially U shape in a plan view. 2. The support member according to claim 1, wherein the support member is a steering bracket to which a bolt as an arm portion passes and is coupled, and a displacement restricting means is fitted to a boss portion of the steering bracket through which the bolt penetrates. The outboard motor mounting device as described in 1. 4. The outboard motor mounting device according to claim 3, wherein the displacement restricting means is formed with a slit in a fitting portion fitted to a boss portion of a steering bracket. 2. The ship according to claim 1, wherein the vibration isolating means has a vibration isolating function for absorbing vibrations of the engine and a displacement regulating function for regulating displacement of the outboard motor main body relative to the mounting device. External unit mounting device.

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