Ship propulsion systems, drive control systems, and ships

Abstract

The circuit board is fixed to the inner wall surface of the enclosure. [Solution] The ship's propulsion system comprises a drive source and a drive control device that controls the drive source. The drive control device comprises a housing, a control board, an auxiliary member, and a fixing member. The control board has a substrate arranged along the inner wall surface of the housing and electronic components mounted on the substrate, and controls the drive source. The auxiliary member sandwiches at least a portion of the substrate between itself and the inner wall surface. The fixing member extends from the auxiliary member to the inner wall surface and fixes the auxiliary member to the housing.

Description

Technical Field

[0001] The technology disclosed in this specification relates to a ship propulsion machine, a drive control device, and a ship.

Background Art

[0002] A ship propulsion machine includes a drive source such as an electric motor or an engine, and a drive control device that controls the drive source. The drive control device has a substrate and electronic components mounted on the substrate. The substrate is fixed to a heat sink or the like of the ship propulsion machine (see, for example, Patent Documents 1 to 3).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a conventional ship propulsion machine, there is room for improvement in the configuration for fixing the substrate inside the ship propulsion machine.

[0005] This specification discloses a technology capable of solving the above-described problems.

Means for Solving the Problems

[0006] The technology disclosed in this specification can be realized, for example, in the following forms.

[0007] (1) A ship propulsion system disclosed herein comprises a drive source and a drive control device for controlling the drive source, wherein the drive control device comprises a housing, a substrate disposed along the inner wall surface of the housing, and electronic components mounted on the substrate, and further comprises a control board for controlling the drive source, an auxiliary member disposed on a non-displacement area of ​​the substrate where the electronic components are not disposed and sandwiching at least a portion of the substrate between itself and the inner wall surface, and a fixing member extending from the auxiliary member to the inner wall surface and fixing the auxiliary member to the housing. In this configuration, the auxiliary member sandwiches at least a portion of the substrate of the control board between itself and the inner wall surface of the housing. The fixing member fixes the auxiliary member to the inner wall surface. Therefore, the auxiliary member supports and fixes the substrate to the inner wall surface of the housing.

[0008] (2) In the above-mentioned ship propulsion system, the auxiliary member may be configured to have higher rigidity than the substrate. In this configuration, the auxiliary member reinforces the substrate and fixes it to the inner wall surface of the housing.

[0009] (3) In the above-described ship propulsion system, the housing may be electrically conductive and further comprise an insulator disposed between the non-placed area on the substrate and the inner wall surface. In this configuration, the insulator suppresses direct electrical conductivity between the control board and the housing.

[0010] (4) In the above-mentioned ship propulsion system, a heat sink may be further provided between the arrangement area on the substrate where the electronic components are arranged and the inner wall surface. In this configuration, the heat sink improves the heat dissipation from the electronic components of the control board.

[0011] (5) In the above-described ship propulsion system, the auxiliary member may be configured as a terminal block on which external connection terminals are arranged. In this configuration, the auxiliary member supports the circuit board and fixes it to the inner wall surface of the housing, and further functions as a connector member.

[0012] (6) In the above-described ship propulsion system, the housing may be electrically conductive, the terminal block may be electrically conductive, the fixing member may be electrically conductive, and the terminal block may be electrically connected to the housing via the fixing member. In this configuration, the fixing member electrically connects the terminal block to the housing.

[0013] (7) In the above-described ship propulsion system, the ground line on the substrate may be electrically connected to the housing via the auxiliary member and the fixing member. In this configuration, the auxiliary member and the fixing member electrically connect the glide line on the substrate to the housing.

[0014] (8) In the above-described ship propulsion system, the auxiliary member may have a through hole formed therein that penetrates toward the inner wall surface, and the fixing member may be a fastening member inserted into the through hole. In this configuration, the fastening member fixes the auxiliary member to the housing.

[0015] (9) In the above-described ship propulsion system, the housing is conductive, the auxiliary member is conductive, the fastening member is conductive, and the system may also be configured to include a conductive member interposed between the fastening member and the auxiliary member to electrically connect the fastening member and the auxiliary member. In this configuration, the conductive member and the fastening member fix the auxiliary member to the housing.

[0016] (10) In the above-described ship propulsion system, the conductive member may be configured to have a first contact portion that contacts both the inner circumferential surface forming the through-hole of the auxiliary member and the outer circumferential surface of the fastening member. In this configuration, the first contact portion of the conductive member is intended to ensure electrical conductivity between the fastening member and the auxiliary member and to suppress radial rattle of the fastening member relative to the auxiliary member.

[0017] (11) In the above-described marine propulsion device, the conductive member may be configured to have a second contact portion that contacts both the head of the fastening member and the surface of the auxiliary member. In this configuration, the second contact portion of the conductive member aims to achieve electrical continuity between the fastening member and the auxiliary member and suppress axial play of the fastening member with respect to the auxiliary member.

[0018] (12) The marine propulsion device disclosed in this specification is a marine propulsion device including a drive source and a drive control device that controls the drive source. The drive control device has a housing, a substrate disposed along the inner wall surface of the housing, and electronic components mounted on the substrate, and includes a control substrate that controls the drive source, an auxiliary member that sandwiches at least a part of the substrate between the inner wall surface, and a fixing member that extends from the auxiliary member to the inner wall surface and fixes the auxiliary member to the housing. According to this marine propulsion device, the auxiliary member fixes the substrate to the inner wall surface of the housing while assisting it.

[0019] Note that the technology disclosed in this specification can be realized in various forms, for example, in the form of a marine propulsion device, a ship including the marine propulsion device, etc.

Effects of the Invention

[0020] According to the technology disclosed by this specification, the auxiliary member sandwiches at least a part of the substrate of the control substrate between the inner wall surface of the housing, and the fixing member fixes the auxiliary member to the inner wall surface. Therefore, the substrate is fixed to the inner wall surface of the housing while being assisted by the auxiliary member.

Brief Description of the Drawings

[0021] [Figure 1] Perspective view schematically showing the configuration of a ship according to an embodiment [Figure 2] Side view showing the configuration of an electric propulsion device [Figure 3] [[ID=二十九]]Schematic diagram showing the configuration of a drive unit [Figure 4] Block diagram showing the configuration of a ship control system in a ship [Figure 5]Explanatory drawing showing the fixed state of the MCU inside the lower housing [Figure 6] Explanatory drawing schematically showing the arrangement configuration of the control board and the terminal block [Figure 7] Explanatory drawing showing the cross-sectional configuration of a part of the MCU and the lower housing

Embodiment for Carrying out the Invention

[0022] FIG. 1 is a perspective view schematically showing the configuration of a ship 10 according to the present embodiment. In FIG. 1 and other drawings described later, arrows indicating respective directions based on the position of the ship 10 may be shown. Specifically, in each drawing, arrows indicating FRONT (front), REAR (rear), LEFT (left), RIGHT (right), UPPER (upper), and LOWER (lower) may be shown. The front-rear direction, left-right direction, and up-down direction (vertical direction) are directions orthogonal to each other respectively.

[0023] As shown in FIG. 1, the ship 10 includes a hull 200 and an electric propulsion unit 100. The electric propulsion unit 100 is an example of a ship propulsion unit.

[0024] The hull 200 is a part of the ship 10 where an operator (crew) boards. The hull 200 has a hull main body 210, a cockpit 220, and a control device 230.

[0025] A living space 212 is formed in the hull main body 210. The cockpit 220 is installed in the living space 212. The hull 200 further has a partition wall 214 and a transom 216. The partition wall 214 partitions the rear side in the living space 212. The transom 216 is located at the rear end of the hull 200. In the front-rear direction, a space 215 exists between the transom 216 and the partition wall 214.

[0026] The control device 230 is a device for steering the ship. The control device 230 is installed near the cockpit 220. The control device 230 includes a steering wheel 232, a shift / throttle lever 240, a joystick unit 250, a display device 260, and an input device 270.

[0027] The steering wheel 232 is an operating device for steering the vessel 10. The shift / throttle lever 240 is an operating device for shifting gears and changing the thrust of the vessel 10. The joystick unit 250 is an operating device for steering, shifting gears, and changing the thrust of the vessel 10. The display device 260 is, for example, a liquid crystal display that displays various images related to the vessel 10 (such as operation images). The input device 270 is a button for changing the steering mode, for example. The input device 270 includes an LED (Light-emitting Diode).

[0028] Figure 2 is a side view showing the configuration of the electric propulsion system 100. The electric propulsion system 100 is a device that generates thrust to propel the ship 10. The electric propulsion system 100 is an electric propulsion system driven by an electric motor 134. The electric propulsion system 100 in this embodiment is an outboard motor. In the following, unless otherwise specified, the electric propulsion system 100 in the reference position will be described. The reference position is the position of the electric propulsion system 100 when the ship 10 is underway (the position shown in Figures 1 and 3), and is the position in which the propeller rotation axis L of the propeller 132, which will be described later, extends in the longitudinal direction. The longitudinal, lateral, and vertical directions are each determined based on the electric propulsion system 100 in the reference position. The electric motor 134 is an example of a drive source.

[0029] The electric propulsion system 100 is mounted on the transom 216 located at the rear (stern) of the hull 200 (see Figure 1). The electric propulsion system 100 comprises a propulsion unit 101 and a suspension system 102.

[0030] The thruster body 101 includes a cowl 110, a middle housing 150, a lower housing 120, a duct 122, and a drive unit 130.

[0031] The cowl 110 is located on top of the electric propulsion system 100. The cowl 110 is a cover that houses various wiring and other components.

[0032] The middle housing 150 is located below the cowl 110 of the electric propulsion system 100. The middle housing 150 is a cover that houses the steering device 152, SCU 154, and various wiring, which will be described later.

[0033] The lower housing 120 is located below the middle housing 150 in the electric propulsion system 100. The lower housing 120 is a cover that houses the MCU 139 (described later), various wiring, etc. The lower housing 120 is rotatably mounted to the middle housing 150 around an axis along the vertical direction. Note that the lower housing 120 may be positioned lower than the water surface W in the reference posture (see Figure 2).

[0034] The duct 122 is located below the lower housing 120 of the electric propulsion system 100. The duct 122 is a tubular body extending in the longitudinal direction. In the reference posture, the duct 122 is positioned lower than the water surface W (see Figure 2). The drive unit 130 is located radially inside the duct 122. A stator fin 133 and a bearing 135 are provided radially inside the duct 122 (see Figure 2). The bearing 135 supports the propeller 132, described later, so that it can rotate around the propeller rotation axis L. The stator fin 133 has multiple (e.g., three) fins. The multiple fins are arranged radially around the bearing 135. The multiple fins are arranged at equal intervals around the propeller rotation axis L. The multiple fins are fixed to the duct 122. Multiple fins are positioned behind the propeller 132, protruding rearward from the duct 122 (see Figures 1 and 2).

[0035] Figure 3 is a schematic diagram showing the configuration of the drive unit 130. The drive unit 130 generates thrust to propel the ship 10. The drive unit 130 includes a propeller 132 and an electric motor 134.

[0036] The propeller 132 is a rotating body having multiple blades. The propeller 132 generates thrust by rotating. The propeller 132 is located radially inward of the duct 122. The propeller 132 is rotatable around a horizontal propeller rotation axis L. The propeller rotation axis L is parallel to the central axis of the duct 122. The propeller 132 is completely enclosed by the duct 122.

[0037] The electric motor 134 rotates the propeller 132. The electric motor 134 includes a rotor 136 and a stator 138.

[0038] The rotor 136 is a tubular body extending in the longitudinal direction. The rotor 136 is rotatably supported relative to the duct 122. The rotor 136 rotates around the propeller rotation axis L relative to the stator 138. The propeller 132 is positioned radially inward of the rotor 136. The propeller 132 is fixed to the rotor 136. The propeller 132 rotates together with the rotor 136. The rotor 136 includes a plurality of permanent magnets 140. In Figure 5, only one of the plurality of permanent magnets 140 is referenced, and the reference numerals for the other permanent magnets 140 are omitted. The plurality of permanent magnets 140 are arranged along the circumferential direction of the rotor 136.

[0039] The stator 138 is a tubular body extending in the front-rear direction. The stator 138 is located radially outward from the rotor 136. The stator 138 is located on the same axis as the rotor 136. The stator 138 is fixed to the duct 122. The stator 138 includes a plurality of coils 142. In Figure 5, only one of the coils 142 is referenced, and the reference numerals for the other coils 142 are omitted. The plurality of coils 142 are arranged along the circumferential direction of the stator 138.

[0040] When multiple coils 142 are energized, an electromagnetic force is generated that rotates the rotor 136. With this configuration, the propeller 132 generates forward thrust when the rotor 136 of the electric motor 134 rotates in the forward direction, and backward thrust when the rotor 136 of the electric motor 134 rotates in the reverse direction.

[0041] The suspension device 102 is a device that suspends the propulsion unit 101 from the hull 200. The suspension device 102 rotates the propulsion unit 101 around the tilt axis At (see Figure 2). This enables a tilt operation that rotates the propulsion unit 101 vertically relative to the hull 200.

[0042] Figure 4 is a block diagram showing the internal configuration of the ship control system 10S in the ship 10. Each component of the ship control system 10S is connected to each other in a communicative manner, for example, by CLP (Command Line Processor) communication. As shown in Figure 4, the hull 200 has a BCU 300, a GPS 310, a battery 320, and a display control device 262.

[0043] The Boat Control Unit (BCU) 300 controls the overall operation of the vessel 10 based on signals transmitted from each of its components, for example. The BCU 300 includes, for example, a CPU, a multi-core CPU, and programmable devices (such as a Field Programmable Gate Array (FPGA) and a Programmable Logic Device (PLD)).

[0044] The GPS (Global Positioning System) 310 is a device that determines the current position of the ship 10 using signals received from satellites. The battery 320 is an energy storage device. The battery 320 supplies power to the electric motor 134 and the input device 270, which will be described later. The display control device 262 controls the display of the display device 260.

[0045] The electric propulsion system 100 includes the aforementioned electric motor 134, steering device 152, MCU 139, and SCU 154.

[0046] The steering device 152 is a device that controls the rudder angle of the vessel 10. The steering device 152 is housed in the middle housing 150. The steering device 152 includes, for example, an electric motor for steering (not shown) and a steering shaft (not shown) extending in the vertical direction. When the rudder angle is changed by the steering device 152, for example, the electric motor rotates the steering shaft. As the steering shaft rotates, the lower housing 120 connected to the steering shaft and the drive unit 130 connected to the lower housing 120 rotate around an axis along the vertical direction. This changes the rudder angle of the vessel 10.

[0047] The MCU (Motor Control Unit) 139 drives the electric motor 134. The MCU 139 is housed in the lower housing 120. The MCU 139 is an example of a drive control device.

[0048] The Steering Control Unit (SCU) 154 controls the operation of the steering device 152. The SCU 154 includes, for example, a CPU, a multi-core CPU, and programmable devices (such as a Field Programmable Gate Array (FPGA) or Programmable Logic Device (PLD)). The SCU 154 is housed in a middle housing 150.

[0049] Figure 5 is an explanatory diagram showing the fixing state of the MCU 139 within the lower housing 120. As shown in Figure 5, the MCU 139 is fixed to the inner wall surface 121 of the lower housing 120. The lower housing 120 is made of a conductive material (for example, a metal material such as aluminum). The lower housing 120 is an example of a housing.

[0050] Figure 6 is a schematic diagram showing the arrangement of the control board 410 and terminal block 420, which will be described later, and Figure 7 is a diagram showing the cross-sectional configuration of part of the MCU 139 and lower housing 120. As shown in Figures 6 and 7, the MCU 139 has a cover 400, a control board 410, a plurality of terminal blocks 420, a plurality of fastening members 430, an insulating sheet 440, a heat dissipation sheet 450, and a plurality of collars 460. The terminal block 420 is an example of an auxiliary member, the fastening member 430 is an example of a fixing member, the insulating sheet 440 is an example of an insulator, and the heat dissipation sheet 450 is an example of a heat sink. Some of the plurality of collars 460 are conductive members.

[0051] The control board 410 controls the drive of the electric motor 134. As shown in Figure 6, the control board 410 has a circuit board 412 and electronic components 414. The circuit board 412 is arranged along the inner wall surface 121 of the lower housing 120 (see Figure 7). The electronic components 414 are, for example, circuit elements that function as an inverter circuit. In Figure 6, a configuration in which the electronic components 414 are arranged in one place on the circuit board 412 is illustrated, but the electronic components 414 are arranged in multiple places on the circuit board 412. Thus, on the circuit board 412, there are arrangement areas E1 where the electronic components 414 are arranged and non-arrangement areas E2 where the electronic components 414 are not arranged.

[0052] The heat dissipation sheet 450 is, for example, a resin sheet having thermal conductivity. The heat dissipation sheet 450 is formed from, for example, acrylic resin or silicone resin. The heat dissipation sheet 450 is placed between the portion of the substrate 412 corresponding to the placement area E1 and the inner wall surface 121 of the lower housing 120. In this embodiment, one side of the heat dissipation sheet 450 is in contact with the substrate 412, and the other side of the heat dissipation sheet 450 is in contact with the inner wall surface 121.

[0053] The insulating sheet 440 is, for example, an electrically insulating resin sheet. The insulating sheet 440 is formed of, for example, polytetrafluoroethylene. The insulating sheet 440 is placed between the portion of the substrate 412 corresponding to the non-placement area E2 and the inner wall surface 121 of the lower housing 120. In this embodiment, the insulating sheet 440 is placed so as to surround the entire perimeter of the heat dissipation sheet 450. In this embodiment, one side of the insulating sheet 440 is in contact with the substrate 412, and the other side of the insulating sheet 440 is in contact with the inner wall surface 121.

[0054] Of the inner wall surfaces 121, the first inner wall surface 121A, where the insulating sheet 440 is placed, is higher than the second inner wall surface 121B, where the heat dissipation sheet 450 is placed. Therefore, the thickness of the insulating sheet 440 is thinner than the thickness of the heat dissipation sheet 450. In other words, the thickness of the portion of the inner wall surface 121 corresponding to the first inner wall surface 121A is thicker than the thickness of the portion corresponding to the second inner wall surface 121B. Multiple screw holes 123 are formed in the first inner wall surface 121A.

[0055] Each terminal block 420 is positioned so as to sandwich the substrate 412 between itself and the inner wall surface 121 of the lower housing 120. Multiple terminal blocks 420 are arranged on the non-placement area E2. The terminal blocks 420 are made of a conductive material (for example, a metal material such as aluminum, iron, or stainless steel).

[0056] Each terminal block 420 has a base 422 and a projection 424 (see Figure 6). The base 422 is a long, flat plate. The rigidity of the base 422 is higher than that of the substrate 412. In this embodiment, the material forming the base 422 is harder than the material forming the substrate 412, and the thickness of the base 422 is greater than that of the substrate 412 (see Figure 7). Through holes 423 are formed at both ends of the base 422. Each through hole 423 penetrates the base 422 toward the inner wall surface 121 of the lower housing 120. The projection 424 is formed in the center of the base 422. The projection 424 protrudes in the opposite direction from the lower housing 120. The projection 424 is cylindrical and has a fixing hole 425 for fixing an external connection terminal T (see Figure 5).

[0057] Each fastening member 430 is, for example, a bolt. The fastening members 430 are made of a conductive material (for example, a metal material such as aluminum, iron, or stainless steel). The fastening member 430 has a head 432 and a threaded portion 434. The threaded portion 434 of the fastening member 430 is inserted into the through hole 423 of the terminal block 420. The tip of the threaded portion 434 penetrates the substrate 412 and the insulating sheet 440 and is screwed into the threaded hole 123 formed in the first inner wall surface 121A. In this way, the terminal block 420 is fixed to the lower housing 120 via the fastening members 430. The base 422, substrate 412, and insulating sheet 440 of the terminal block 420 are sandwiched between the head 432 of the fastening member 430 and the lower housing 120.

[0058] Each collar 460 is a component interposed between the fastening member 430 and the terminal block 420. Each collar 460 has a first contact portion 462 and a second contact portion 464. The first contact portion 462 is cylindrical and is positioned within the through hole 423 to surround the threaded portion 434 of the fastening member 430. The first contact portion 462 is in contact with both the inner circumferential surface forming the through hole 423 of the base 422 and the outer circumferential surface of the fastening member 430.

[0059] The second contact portion 464 is flat and positioned at the upper end of the first contact portion 462. The second contact portion 464 protrudes radially outward from the first contact portion 462. The second contact portion 464 is in contact with both the head 432 of the fastening member 430 and the surface of the base 422.

[0060] The multiple collars 460 include conductive collars 460 and insulating collars 460. Of the multiple terminal blocks 420, the collar 460 provided on the terminal block 420 where the ground terminal is located is conductive. Therefore, the ground terminal is electrically connected to the lower housing 120 via the terminal block 420, the collar 460, and the fastening member 430. The terminal block 420 where the ground terminal is located is electrically connected to the wiring pattern of the ground line on the circuit board 412. Therefore, the ground line on the circuit board 412 is electrically connected to the lower housing 120 via the terminal block 420, the collar 460, and the fastening member 430. The conductive collar 460 is an example of a conductive member.

[0061] On the other hand, the collar 460 provided on the terminal block 420 where terminals other than the ground terminal (such as power terminals) are located has insulating properties. Therefore, the collar 460 insulates the terminals other than the ground terminal from the lower housing 120.

[0062] The cover 400 completely covers the control board 410 (see Figure 5). The cover 400 is made of, for example, resin. The projections 424 of each terminal block 420 protrude through the cover 400 and are exposed to the outside, to which the external connection terminals T (T1 to T5) provided at the end of each harness are joined.

[0063] In this embodiment, the terminal block 420 sandwiches the substrate 412 of the control board 410 between itself and the inner wall surface 121 of the lower housing 120. The fastening member 430 fixes the terminal block 420 to the inner wall surface 121. Therefore, the terminal block 420 supports and fixes the substrate 412 to the lower housing 120. Thus, in this embodiment, since the terminal block 420 is directly fixed to the lower housing 120, the number of parts can be reduced compared to, for example, a configuration in which the terminal block 420 is fixed to the lower housing 120 via an intermediate member. In addition, in this embodiment, because there is no intermediate member, the distance between the substrate 412 and the lower housing 120 that is exposed to seawater is shorter. Therefore, the cooling efficiency of the MCU 139 (control board 410) is improved.

[0064] In this embodiment, the rigidity of the base 422 is higher than that of the substrate 412. Therefore, the terminal block 420 reinforces the substrate 412 while fixing it to the lower housing 120. In this embodiment, the terminal block 420 is fixed to the lower housing 120 and electrically connected via the fastening member 430 and the conductive collar 460. The first contact portion 462 of the conductive collar 460 ensures electrical conductivity between the fastening member 430 and the terminal block 420 and suppresses radial play of the fastening member 430 relative to the terminal block 420. The second contact portion 464 of the conductive collar 460 ensures electrical conductivity between the fastening member 430 and the terminal block 420 and suppresses axial play of the fastening member 430 relative to the terminal block 420.

[0065] (modified version) The technologies disclosed herein are not limited to the embodiments described above and can be modified in various forms without departing from their essence, for example, the following modifications are possible.

[0066] The configurations of the ship 10, ship control system 10S, and electric propulsion system 100 in the above embodiment are merely examples and can be modified in various ways. For example, in the above embodiment, an electric propulsion system 100, which is an outboard motor, is given as an example of a ship's propulsion system, but the ship's propulsion system may be an inboard motor, an inboard / outboard motor, a jet propulsion system, etc.

[0067] In the above embodiment, the electric propulsion system 100 has only an electric motor as a drive source, but the ship's propulsion system may be a hybrid type having an engine in addition to the electric motor. Alternatively, the ship's propulsion system may be configured to have only an engine. The drive control device is not limited to the MCU 139, but may be an ECU (Engine Control Unit) that controls the engine.

[0068] The housing is not limited to the lower housing 120; it may also be a cowl 110 or a middle housing 150. In short, the housing can be any external body (housing, body, etc.) that constitutes the external shape of the marine propulsion system.

[0069] The auxiliary member is not limited to the terminal block 420, but may also be the terminal itself that is soldered to the circuit board. The auxiliary member does not need to have the function of a terminal block or a terminal. The rigidity of the auxiliary member may be less than or equal to the rigidity of the circuit board. The number of through holes formed in the auxiliary member is not limited to two, but may be one or three or more.

[0070] The fixing member is not limited to the fastening member 430, but may be a member fixed to the housing by, for example, press-fitting or engagement. The insulator is not limited to the insulating sheet 440, but may be an insulator having a shape other than a sheet. The heat sink is not limited to the heat sink sheet 450, but may be a heat sink having a shape other than a sheet (such as a heat sink). The conductive member is not limited to the collar 460, but may be a member with a different shape from the collar 460.

[0071] In the above embodiment, the fixing member (fastening member 430) does not need to be conductive. In the above embodiment, the configuration may not include the collar 460. [Explanation of symbols]

[0072] 10: Ship 100: Electric propulsion system 120: Lower housing 121: Inner wall surface 121A: First inner wall surface 121B: Second inner wall surface 134: Electric motor 139: MCU 200: Hull 410: Control board 412: Circuit board 414: Electronic component 420: Terminal block 422: Base 423: Through hole 424: Projection 425: Fixing hole 430: Fastening member 432: Head 434: Screw part 440: Insulating sheet 450: Heat dissipation sheet 460: Collar 462: First contact area 464: Second contact area E1: Placement area E2: Non-placement area T: Terminal

Claims

1. A ship propulsion system comprising a drive source and a drive control device for controlling the drive source, The drive control device is The casing and A control board having a substrate arranged along the inner wall surface of the housing and electronic components mounted on the substrate, which controls the drive source, The auxiliary member is placed on a non-placement area of ​​the substrate where the electronic components are not placed, and sandwiches at least a portion of the substrate between itself and the inner wall surface. A fixing member extending from the auxiliary member to the inner wall surface, which fixes the auxiliary member and the housing, A ship's propulsion system equipped with the following features.

2. A ship propulsion system according to claim 1, The auxiliary member is more rigid than the substrate, and is a ship propulsion device.

3. A ship propulsion system according to claim 1 or claim 2, The housing is electrically conductive, Furthermore, the ship's propulsion system includes an insulator disposed between the non-placed area and the inner wall surface of the substrate.

4. A ship propulsion system according to claim 3, Furthermore, the ship's propulsion system includes a heat sink positioned between the arrangement region on the substrate where the electronic components are arranged and the inner wall surface.

5. A ship propulsion system according to any one of claims 1 to 4, The auxiliary member is a terminal block on which external connection terminals are arranged, in a ship propulsion system.

6. A ship propulsion system according to claim 5, The housing is electrically conductive, The terminal block is electrically conductive, The aforementioned fixing member is electrically conductive, The terminal block is electrically connected to the housing via the fixing member, in a ship propulsion system.

7. A ship propulsion system according to claim 6, A marine propulsion system in which the ground line on the substrate is electrically connected to the housing via the auxiliary member and the fixing member.

8. A ship propulsion system according to any one of claims 1 to 7, The auxiliary member has a through hole formed therein that penetrates toward the inner wall surface. The aforementioned fixing member is a fastening member inserted into the through hole, in a ship propulsion machine.

9. A ship propulsion system according to claim 8, The housing is electrically conductive, The auxiliary member has conductivity, The fastening member is electrically conductive, Furthermore, the ship's propulsion system includes a conductive member interposed between the fastening member and the auxiliary member, which electrically connects the fastening member and the auxiliary member.

10. A ship propulsion system according to claim 9, A ship propulsion machine, wherein the conductive member has a first contact portion that contacts both the inner circumferential surface forming the through hole of the auxiliary member and the outer circumferential surface of the fastening member.

11. A ship propulsion system according to claim 9 or claim 10, A ship propulsion machine, wherein the conductive member has a second contact portion that contacts both the head of the fastening member and the surface of the auxiliary member.

12. The hull and, A ship comprising a ship propulsion engine according to any one of claims 1 to 11, which is disposed on the hull.

13. A drive control device for controlling a drive source, The casing and A control board having a substrate arranged along the inner wall surface of the housing and electronic components mounted on the substrate, which controls the drive source, An auxiliary member that sandwiches at least a portion of the substrate between itself and the inner wall surface, A fixing member extending from the auxiliary member to the inner wall surface, which fixes the auxiliary member and the housing, A drive control device equipped with the following:

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