JP4836605B2 - Outboard motor support device - Google Patents

Description

  The present invention relates to an outboard motor support device provided in a ship.

In a conventional outboard motor support device, for example, a clamp bracket is fixed to a transom board of a hull, a swivel bracket is pivotally connected to the clamp bracket via a tilt shaft, and propelled via a swivel bracket cover to the swivel bracket. The unit is pivotably supported. This clamp bracket is formed by die casting or die casting using an aluminum alloy (Patent Document 1), and the swivel bracket is similarly formed by die casting or die casting using an aluminum alloy. Yes.
Japanese Patent Laid-Open No. 55-119582

  As described above, the clamp bracket and the swivel bracket are formed by die casting or casting using an aluminum alloy. In particular, an aluminum alloy is expensive as a metal, and becomes thick and heavy because it is formed by casting. For this reason, it is conceivable to reduce the weight by deleting the surplus with respect to the clamp bracket or the swivel bracket. However, it is not possible to expect a large cost reduction or weight reduction to the extent that the surplus is deleted.

  The present invention has been made in view of this point, and an object thereof is to provide an outboard motor support device that has a simple structure, is low-cost, and can be reduced in weight.

  In order to solve the above problems and achieve the object, the present invention is configured as follows.

According to the first aspect of the present invention , a clamp bracket is fixed to a transom board of a ship , a swivel bracket is rotatably connected to the clamp bracket via a tilt shaft, and a propulsion unit is rotatably supported by the swivel bracket. In the outboard motor support device
The pair of left and right clamp brackets and the swivel bracket are formed by a sheet metal plate with reference to the traveling direction in which the ship moves forward,
The pair of left and right clamp brackets are connected by a front stay and a rear stay at positions before and after the transom board fixed with respect to a traveling direction in which the ship moves forward,
The swivel bracket is rotatably connected to the pair of left and right clamp brackets via the left and right tilt shafts,
The front stay includes a clamp screw mechanism for fixing the pair of left and right clamp brackets to the transom board,
The clamp screw mechanism is an outboard motor support device attached through a nut fixed to the transom board side of the front stay.

According to a second aspect of the present invention, a clamp bracket is fixed to a transom board of a ship, a swivel bracket is rotatably connected to the clamp bracket via a tilt shaft, and a propulsion unit is rotatably supported by the swivel bracket. In the outboard motor support device
The pair of left and right clamp brackets and the swivel bracket are formed by a sheet metal plate with reference to the traveling direction in which the ship moves forward,
The pair of left and right clamp brackets are connected by a front stay and a rear stay at positions before and after the transom board fixed with respect to a traveling direction in which the ship moves forward,
The swivel bracket is formed in a U shape in a plan view, and the left and right ends of the swivel bracket and the pair of left and right clamp brackets are rotatably connected via a pair of left and right tilt shafts ,
The outboard motor support device is characterized in that the outboard motor supported by the swivel bracket can be tilted up with the pair of left and right tilt shafts as fulcrums .

According to a third aspect of the present invention, the pair of left and right clamp brackets have a transom board contact surface formed by press bending abutting against a rear side surface of the transom board with reference to a traveling direction in which the ship advances. An outboard motor support apparatus according to claim 1 or 2, wherein

The invention according to claim 4
A tilt stopper mechanism for maintaining a tilt-up state of the propulsion unit;
The tilt stopper mechanism is
A tilt lock claw part integrally or separately attached to the swivel bracket;
A tilt lock lever rotatably attached to the clamp bracket;
A holding member for holding the tilt lock lever in a predetermined position;
Have
4. The outboard motor support device according to claim 1, wherein the tilt lock claw portion is held by the tilt lock lever to hold a tilt-up state of the propulsion unit. 5. It is.

The invention described in claim 5
A swivel bracket cover fixed to the swivel bracket is formed by a sheet metal plate,
5. The outboard motor support device according to claim 1, wherein the propulsion unit is pivotally supported by the swivel bracket cover and the swivel bracket via a bush. 6. is there.

The invention according to claim 6 is characterized in that the pair of left and right tilt shafts are arranged behind the transom board and at a position below the upper end. A support device for an outboard motor as described in 1.

  With the above configuration, the present invention has the following effects.

In the first aspect of the invention, the clamp screw mechanism is attached via a nut fixed to the transom board side of the front stay, and in particular, the clamp screw mechanism is provided without performing complicated processing on a part of the clamp bracket. Therefore, it is possible to greatly contribute to cost reduction, and the axial force when the clamp screw is tightened does not act on the fixing portion of the nut, thereby preventing a decrease in reliability due to insufficient fixing strength.

In the invention described in claim 2 , the swivel bracket is formed in a U shape in plan view, and the left and right ends of the swivel bracket and the pair of left and right clamp brackets can be rotated via a pair of left and right tilt shafts. The outboard motor supported by the swivel bracket can be tilted up with the pair of left and right tilt shafts as fulcrums, and the clamp bracket and swivel bracket are press-formed by a sheet metal plate. Therefore, the material is inexpensive and easy to manufacture, and the cost can be reduced. Further, the pair of left and right clamp brackets are connected by the front stay and the rear stay at the front and rear positions of the transom board fixed on the basis of the traveling direction in which the ship advances, and are strong in the frame structure.

In the invention according to claim 3 , the pair of left and right clamp brackets can be provided with a surface pressure comparable to that of the conventional one against the rear side surface of the transom board by providing the contact surface of the transom board, and the transom board is damaged. Can be prevented.

In the invention according to claim 4, a tilt stopper mechanism is constituted by a tilt lock claw portion that is integrally or separately attached to the swivel bracket and a tilt lock lever that is rotatably attached to the clamp bracket, and is about half of the mechanism. The tilt lock claw portion can be formed with the swivel bracket, which can contribute to cost reduction and simplification of the mechanism. In the invention according to claim 5, the swivel bracket cover is fixed to the swivel bracket, and the swivel bracket cover is pressed by a sheet metal plate. Since it is molded, the material is cheaper and easier to manufacture than aluminum casting, and the cost can be reduced.

In the invention described in claim 6, a pair of left and right tilt axis, behind the transom board, and by arranging the upper end portion to the lower position, the position and the outboard motor of the pair of left and right tilt axis between the position of the center of gravity Since the distance is shortened, the load when the outboard motor is tilted up can be greatly reduced.

  Hereinafter, embodiments of the support device for an outboard motor of the present invention will be described. However, the embodiments of the present invention show the most preferable modes of the present invention, and the present invention is not limited thereto.

  FIG. 1 is a side view of an outboard motor mounted on a ship, FIG. 2 is a plan view of the engine of the outboard motor, and FIG. 3 is a side view of the engine of the outboard motor as viewed from the rear in the traveling direction. In this embodiment, the forward direction, the rear side, the right side, and the left side are defined with reference to the traveling direction in which the ship advances.

  First, in FIG. 1, the ship has a transom board 2 at the rear of the hull 1. A clamp bracket 10 is fixed to the transom board 2 by a clamp screw mechanism 20. A swivel bracket 30 is rotatably connected to the clamp bracket 10 via a tilt shaft 4. A support cylinder 51 of the propulsion unit 50 is supported on the swivel bracket 30 via upper and lower swivel bracket covers 33 so as to be rotatable.

  An upper casing 157 is attached to the lower part of the support cylinder 51, and a lower casing 158 is attached to the lower end of the upper casing 157. A drive shaft 53 a is disposed in the upper casing 157. The lower casing 158 is provided with a power transmission gear unit 53b and a propeller shaft 53c, and a propeller 52 is provided on the propeller shaft 53c.

  On the other hand, a four-cycle engine 60 is provided above the support cylinder 51 via a transmission unit 70. The engine 60 is air-cooled, and the power of the engine 60 is decelerated by a transmission mechanism 71 built in the transmission unit 70 to form a power transmission mechanism 53 built in the upper casing 157 and the lower casing 158 from the support cylinder 51. It is transmitted to the propeller 52 via the drive shaft 53a, the power transmission gear unit 53b, and the propeller shaft 53c, and a propulsive force is obtained by the rotation of the propeller 52.

  The engine 60 has an engine main body 61, and the engine main body 61 is arranged with the cylinder 62 facing rearward. An intake pipe 63 is connected to the upper part of the cylinder 62, and an air cleaner 64 is connected to the intake pipe 63. A carburetor 65 is disposed in the intake pipe 63, and the carburetor 65 is operated by a throttle operation mechanism 80. An exhaust pipe 265 is connected to the lower portion of the cylinder 62, and a muffler 266 is connected to the exhaust pipe 265 so that the exhaust gas is exhausted in the air.

  The throttle operation mechanism 80 includes a throttle lever 81, a first throttle rod 82, a second throttle rod 83, a support link 84, an operation link 85, and an operation shaft 86. The throttle lever 81 is rotatably supported by a mounting plate 87 with a rotating shaft 88 as a fulcrum. One end of the first throttle rod 82 is locked to the throttle lever 81, and the other end of the first throttle rod 82 is connected to the support link 84. It is locked. One end of the second throttle rod 83 is locked to the support link 84, the other end of the second throttle rod 83 is locked to the operation link 85, and the operation link 85 is fixed to the operation shaft 86. By pulling the throttle lever 81 forward, the operation shaft 86 is rotated in the opening direction via the first throttle rod 82, the support link 84, the second throttle rod 83, and the operation link 85, while the throttle lever 81 is returned. The operating shaft 86 can be returned to the initial closed position.

  The mounting plate 87 is fastened and fixed to the right side of the engine main body 61 by a bolt 188, and has a stopper 89 that restricts the rotation of the throttle lever 81, and the operation position in the pulling direction when the claw portion 81a of the throttle lever 81 abuts. Regulate. The support link 84 is rotatably supported by a support portion 63a formed integrally with the intake pipe 63.

  A fuel tank 90 is disposed on the upper portion of the engine body 61. The rear side of the fuel tank 90 is supported on both sides of the engine body 61 by a pair of left and right stays 91, and the front side is supported by a flywheel magneto cover 93 of the engine body 61 by one front side stay 92. A predetermined space 190 is formed between 90 and the flywheel magneto cover 93. A starter handle 101 for starting the recoil starter 100 protrudes from the front side of the flywheel magnet cover 93 so that the passenger can easily start the engine 60 by pulling the starter handle 101 from the front side.

  The pair of left and right stays 91 are respectively formed in an L shape, and mounting portions 91a extending in the vertical direction are mounted on both side portions of the engine body 61 by bolts 94, and brackets 91c are welded to support portions 91b extending rearward. Attachment portions 90a on the left and right sides of the fuel tank 90 are fastened and fixed to the bracket 91c by bolts 95.

  The front stay 92 is formed so as to extend left and right, and is fixed to the upper part of the front side of the flywheel magneto cover 93 by welding or the like. A pair of left and right mounting portions 90 b formed on the front side of the fuel tank 90 are fastened and fixed to the front stay 92 by bolts 96. A fuel cap 90c is provided at the upper part of the fuel tank 90, and the fuel is supplied by removing the fuel cap 90c. A fuel cock 90d is provided at the lower right side of the fuel tank 90. By opening the fuel cock 90d, fuel is supplied to the carburetor 65 via the fuel supply pipe 90e.

  A handle mounting portion 110 is fastened and fixed to the lower left portion of the engine main body 61 by a bolt 111. A manual operation handle 112 is provided on the handle attachment portion 110 so as to be rotatable about a rotation shaft 113. The position of the manual operation handle 112 is adjusted by tightening and fixing the positioning bolt 114 at a predetermined position of the arc-shaped groove 112b provided in the base 112a. State.

  In this outboard motor, the front end 30a of the swivel bracket 30 is in contact with a stopper 211 fixed to the clamp bracket 10, and can be tilted up with the tilt shaft 4 as a fulcrum. Further, the outboard motor of FIG. 1 shows a forward movement state, and when moving backward, the propulsion unit 50 is rotated around the axis center of the support cylinder 51 to be reversed forward and backward. The lifting prevention claw 120 fixed to the support cylinder 51 of the propulsion unit 50 by this reverse rotation is engaged with the support piece 121 fixed to the clamp bracket 10 so that the propulsion unit 50 is not lifted by the propulsive force of the propeller 52. To do.

  In addition, since the engine 60 of the propulsion unit 50 is not covered with a cowl, this outboard motor is directly exposed to seawater or water when used in the sea or a lake. It is easy to wash it. Further, since the fuel tank 90 is disposed above the engine body 61 so as to form a space 190, the space 190 can be easily washed with water.

  When this outboard motor travels in shallow water, for example, the occupant pulls the side support stay 91 toward the water in order to bring the propeller 52 onto the water surface, so that the propulsion unit 50 moves upward with the tilt shaft 4 as a fulcrum. Rotate to tilt up. The tilt shaft 4 is disposed behind the transom board 2 and below the upper end 2a, and the distance L1 between the position of the tilt shaft 4 and the center of gravity position G of the outboard motor is shortened. The load when tilting up can be greatly reduced. Therefore, the passenger can pull the engine 50 forward by hand and the propulsion unit 50 can be easily tilted up.

  Next, the outboard motor support device will be described in detail with reference to FIGS. 4 is a right side view of the outboard motor support device, FIG. 5 is a plan view of the outboard motor support device, and FIG. 6 is a view of FIG. 4 viewed from the right side.

  In this outboard motor support device, the pair of left and right clamp brackets 10 are formed, for example, by press-molding an iron-based sheet metal plate, and are less expensive and manufactured than those formed by casting an aluminum alloy. Is easy and the cost can be reduced. The pair of left and right clamp brackets 10 are formed in an inverted U shape so as to straddle the upper end portion 2a of the transom board 2. The straddle portion 10a, the front attachment portion 10b, the rear attachment portion 10c, and the transom board contact surface 10d. The front attachment portions 10b of the pair of left and right clamp brackets 10 are fixed by welding the end portions of the front stay 11, and the rear attachment portions 10c are connected to the engagement holes 10c1 by the protrusions 12e at the end portions of the rear stay 12. The front stay 11 and the rear stay 12 are connected to each other at positions before and after being fixed to the transom board 2. Thus, the pair of left and right clamp brackets 10, the front stay 11 and the rear stay 12 have a frame structure in which they are firmly connected.

  The front stay 11 is formed in a U-shaped cross section, has a side surface portion 11a, an upper surface portion 11b, and a lower surface portion 11c, and is provided so that the side surface portion 11a faces the transom board 2. The front stay 11 is provided with a clamp screw mechanism 20 that fixes the pair of left and right clamp brackets 10 to the transom board 2. The clamp screw mechanism 20 includes a clamp screw 21, a dish-shaped pressing plate 22, and a clamp handle 23. A front end 21a of the clamp screw 21 is rotatably attached to the holding plate 22, and a clamp handle 23 is attached to the rear end 21b so as to be rotatable by a predetermined angle with a support pin 24 as a fulcrum. The clamp screw 21 is penetrated through a through hole 11a1 formed in the side surface portion 11a, and is moved in the tightening direction by the nut 13 or moved in the removal direction. The nut 13 is fixed to the transom board side 11a2 of the side surface portion 11a by welding or the like.

  In this embodiment, the pair of left and right clamp brackets 10 are assembled so that the straddle portion 10 a is placed on the upper end portion 2 a of the transom board 2. When holding the clamp handle 23 of the clamp screw mechanism 20 and rotating the clamp screw 21 in the tightening direction, the nut 13 moves in the tightening direction, and the pressing plate 22 presses the front side surface 2b of the transom board 2, and this reaction force Thus, the transom board contact surface 10d of the pair of left and right clamp brackets 10 presses the rear side surface 2c of the transom board 2 and is securely fastened and fixed. The projection formed integrally with the clamp bracket 10 is bent to form the transom board contact surface 10d. The transom board contact surface 10d of the pair of left and right clamp brackets 10 has a long distance L2 between the tips of both transom board contact surfaces 10d, and can reliably receive the load when turning left and right. Further, the pair of left and right clamp brackets 10 can be securely fastened and fixed to the transom board 2 by pressing between the transom board contact surfaces 10d by the clamp screw mechanism 20. Further, the transom board 2 can have the same surface pressure as the conventional one by the surface 10d per transom board, and the transom board 2 can be prevented from being damaged.

  The clamp screw mechanism 20 has a clamp screw 21 that is passed through the through hole 11a1 of the front stay 11 and is attached via a nut 13 fixed to the transom board side. Since the clamp screw mechanism 20 can be provided without processing, it can greatly contribute to cost reduction. In addition, since the axial force when the clamp screw 21 is tightened via the clamp handle 23 is received by the side surface portion 11a of the front stay 11 via the nut 13, it does not work on the fixed portion fixed by welding the nut 13 or the like. Further, it is possible to prevent a decrease in reliability due to insufficient fixing strength.

  The rear stay 12 is formed in a plate shape, and is provided so that the front side surface portion 12 a faces the transom board 2. The support piece 121 is fixed to the clamp bracket 10 by tightening the support piece 121 with a bolt 130 at the center of the rear stay 12. The support piece 121 is formed by pressing a sheet metal plate, and includes an attachment portion 121a and a support portion 121b. The mounting portion 121a of the support piece 121 is placed on the upper surface portion 12b of the rear stay 12, the support portion 121b faces rearward, and the mounting portion 121a is fastened and fixed by a bolt 130. Although the support piece 121 is formed separately from the rear stay 12, it may be formed integrally with a sheet metal plate.

  The swivel bracket 30 is formed, for example, by press-molding an iron-based sheet metal plate. The swivel bracket 30 is inexpensive and easy to manufacture as compared with a case in which an aluminum alloy is formed by casting, and the cost can be reduced. The swivel bracket 30 is formed in a U shape in plan view so as to be connected to the clamp bracket 10, has a bush support portion 30 g at the center portion, and has bearing portions 30 b at both left and right end portions. As shown in FIG. 5, a shaft hole 30c is formed in the bearing portion 30b, and a bush 31 is fitted into the shaft hole 30c. Then, the bearing portion 30b is contacted with the upper portion of the rear mounting portion 10c of the clamp bracket 10 from the outside via the bush 31, and the tilt shaft 4 is penetrated from the outside into the support hole 10c1 formed in the rear mounting portion 10c. It penetrates through the bush 31 and is fastened and fixed by a nut 32. Thus, the swivel bracket 30 is rotatably connected to the pair of left and right clamp brackets 10 via the tilt shaft 4 so that the outboard motor can be tilted up with the tilt shaft 4 as a fulcrum.

  A stopper 211 is fastened and fixed to the lower portion of the rear mounting portion 10c of the clamp bracket 10 by a nut 212, and a lower portion of the front end portion 30a of the swivel bracket 30 is in contact with the stopper 211. The load position is such that the outboard motor stands upright.

  A pair of upper and lower swivel bracket covers 33 are fastened and fixed to the upper portion 30d and the lower portion 30e of the swivel bracket 30 by bolts 34, respectively. Each swivel bracket cover 33 is divided into two upper and lower structures, and is formed, for example, by press-molding an iron-based sheet metal plate, and is cheaper and easier to manufacture than an aluminum alloy formed by casting. Therefore, cost reduction can be achieved. The swivel bracket cover 33 has a bush support portion 33a at the center so as to be attached to the swivel bracket 30, and flange portions 33b at both left and right ends. Each swivel bracket cover 33 abuts the flange portion 33b against the upper portion 30d and the lower portion 30e of the swivel bracket 30 and is fastened and fixed by bolts 34, and is divided into two parts between the bush support portion 30g and the bush support portion 33a. Bushings 35a and 35b are provided. The support cylinder 51 of the propulsion unit 50 is rotatably supported by the bushes 35a and 35b. The bush support portion 33a is provided with a swivel projection 33a1, and when the support tube 51 turns by engaging the swivel projection 33a1 with the recess 35a1 of the bush 35a, the bushes 35a, 35b are rotated together. The bushes 35a and 35b are prevented from rotating so that the divided portions are not located at the mating portions of the swivel bracket cover 33 and the swivel bracket cover 33, and the bushes 35a and 35b are reliably subjected to the load from the support cylinder 51. It is designed to be a bearing.

  In this embodiment, a support cylinder 51 of the propulsion unit 50 is supported by bushes 35a and 35b with divided parts of a swivel bracket 30 and upper and lower swivel bracket covers 33. Further, the swivel bracket cover 33 is configured to support the bushes 35a and 35b at two upper and lower positions, and the swivel bracket cover 33 is divided into two parts at the upper and lower positions so that the stress load on the swivel bracket 30 is the lowest. It is possible to reduce the weight and reduce the cost by using a gap.

  The upper casing 157 of the propulsion unit 50 is provided with a mounting flange 255, and the lifting prevention claw 120 is fastened and fixed to the mounting flange 255 by a bolt 256. The lifting prevention claw 120 is formed, for example, by press-molding an iron-based sheet metal plate, and includes an attachment portion 120a and a rising claw portion 120b. The mounting portion 120a is applied to the lower side of the mounting flange 255, and the bolt 256 is fastened and fixed from above. The rising claw portion 120b is bent from the mounting portion 120a, rises, has an arc shape when viewed from above, and the rising claw portion 120b engages with the support portion 121b of the support piece 121 when moving backward, The propulsion unit 50 is prevented from being lifted by the propulsive force.

  The propulsion unit 50 is provided with a tilt stopper mechanism 160 that regulates tilt-up. The tilt stopper mechanism 160 includes a tilt lock claw 161, a tilt lock lever 162, and a coil spring 169 that constitutes a holding member. The tilt lock claw portion 161 is fastened and fixed to the right side of the swivel bracket 30 by a bolt 163 and a nut 164 and is attached separately to the swivel bracket 30, but may be formed integrally with the swivel bracket 30. As described above, the tilt lock claw portion 161 is attached to the swivel bracket 30 integrally or separately, and the tilt lock claw portion 161 constituting the tilt stopper mechanism 160 can be formed on the swivel bracket 30 to reduce the cost. Contributes to the simplification of the mechanism.

  The tilt lock lever 162 has an operation cap 170 attached to one end, an annular lock 171 fixed to the other end, and a rotating shaft 165 fixed to the center by welding or the like. The rotary shaft 165 is penetrated by a collar 166 fixed to the right clamp bracket 10, and a lock piece 167 is inserted into a screw portion 165 a at the tip, and is fastened and fixed by a nut 168. A coil spring 169 is attached to the collar 166, one end 169 a is inserted into the lock hole 167 a of the lock piece 167, the other end 169 b is inserted into the lock hole 10 f of the clamp bracket 10, and the tilt lock lever 162 is connected to the clamp bracket 10. It is attached to be freely rotatable.

  When the outboard motor travels in shallow water, the propulsion unit 50 rotates upward with the tilt shaft 4 as a fulcrum when tilting up, and the tip 161a of the tilt lock claw 161 is connected to the tilt lock lever 162. It contacts the annular lock 171. The annular lock 171 is pushed and lifted by the tip 161a of the tilt lock claw 161, and the tilt lock lever 162 rotates against the spring force of the coil spring 169. And the front-end | tip part 161a of the tilt lock claw part 161 enters into the ring | wheel of the annular lock 171 and is locked, and, thereby, the propulsion unit 50 is held in the tilted up state. When tilting down, when the operation cap 170 provided at one end of the tilt lock lever 162 is pushed downward, the tilt lock lever 162 is rotated and the annular lock 171 is lifted, and the tip 161a of the tilt lock claw 161 is annular locked. The propulsion unit 50 deviates from 171 and rotates downward with the tilt shaft 4 as a fulcrum, and the front end 30a of the swivel bracket 30 comes into contact with the stopper 211 fixed to the clamp bracket 10, so that the propulsion unit 50 enters a traveling state.

  The present invention can be applied to a support device for an outboard motor provided in a ship, and has a simple structure, can be reduced in cost, and can be reduced in weight.

It is a side view of the state where an outboard motor is mounted on a ship. It is a top view of the engine of an outboard motor. It is the side view which looked at the engine of the outboard motor from the advancing direction back. It is a right side view of a support device for an outboard motor. It is a top view of the support apparatus of an outboard motor. It is the figure which looked at FIG. 4 from the right side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hull 2 Transom board 4 Tilt shaft 10 Clamp bracket 11 Front side stay 12 Rear side stay 20 Clamp screw mechanism 30 Swivel bracket 33 Swivel bracket cover 50 Propulsion unit 51 Support cylinder 52 Propeller 53 Power transmission mechanism 60 Engine 61 Engine main body 70 Transmission unit 71 Transmission mechanism 160 Tilt stopper mechanism

Claims (6)

A support device for an outboard motor in which a clamp bracket is fixed to a transom board of a ship, a swivel bracket is rotatably connected to the clamp bracket via a tilt shaft, and a propulsion unit is rotatably supported by the swivel bracket. ,
The pair of left and right clamp brackets and the swivel bracket are formed by a sheet metal plate with reference to the traveling direction in which the ship moves forward,
The pair of left and right clamp brackets are connected by a front stay and a rear stay at positions before and after the transom board fixed with respect to a traveling direction in which the ship moves forward,
The swivel bracket is rotatably connected to the pair of left and right clamp brackets via the left and right tilt shafts,
The front stay includes a clamp screw mechanism for fixing the pair of left and right clamp brackets to the transom board,
The outboard motor support device, wherein the clamp screw mechanism is attached via a nut fixed to the transom board side of the front stay. A support device for an outboard motor in which a clamp bracket is fixed to a transom board of a ship, a swivel bracket is rotatably connected to the clamp bracket via a tilt shaft, and a propulsion unit is rotatably supported by the swivel bracket. ,
The pair of left and right clamp brackets and the swivel bracket are formed by a sheet metal plate with reference to the traveling direction in which the ship moves forward,
The pair of left and right clamp brackets are connected by a front stay and a rear stay at positions before and after the transom board fixed with respect to a traveling direction in which the ship moves forward,
The swivel bracket is formed in a U shape in a plan view, and the left and right ends of the swivel bracket and the pair of left and right clamp brackets are rotatably connected via a pair of left and right tilt shafts ,
The outboard motor supporting device, wherein the outboard motor supported by the swivel bracket can tilt up with the pair of left and right tilt shafts as fulcrums .   The pair of left and right clamp brackets have a transom board contact surface formed by press bending that abuts against a rear side surface of the transom board with reference to a traveling direction in which the ship moves forward. Item 3. The outboard motor support device according to Item 2. A tilt stopper mechanism for maintaining a tilt-up state of the propulsion unit;
The tilt stopper mechanism is
A tilt lock claw part integrally or separately attached to the swivel bracket;
A tilt lock lever rotatably attached to the clamp bracket;
A holding member for holding the tilt lock lever in a predetermined position;
Have
4. The outboard motor support device according to claim 1, wherein the tilt lock claw portion is held by the tilt lock lever to hold a tilt-up state of the propulsion unit. 5. . A swivel bracket cover fixed to the swivel bracket is formed by a sheet metal plate,
The outboard motor support device according to any one of claims 1 to 4, wherein the propulsion unit is pivotally supported by the swivel bracket cover and the swivel bracket via a bush. The outboard motor support device according to any one of claims 1 to 5, wherein the pair of left and right tilt shafts are disposed behind the transom board and at a position below the upper end. .