EP4635840A2 - Lenkzylinder und lenksystem für aussenbordmotoren - Google Patents

Lenkzylinder und lenksystem für aussenbordmotoren

Info

Publication number
EP4635840A2
EP4635840A2 EP25192303.3A EP25192303A EP4635840A2 EP 4635840 A2 EP4635840 A2 EP 4635840A2 EP 25192303 A EP25192303 A EP 25192303A EP 4635840 A2 EP4635840 A2 EP 4635840A2
Authority
EP
European Patent Office
Prior art keywords
cylinder
steering
coupled
space
fluid port
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP25192303.3A
Other languages
English (en)
French (fr)
Other versions
EP4635840A3 (de
Inventor
Atul Ramsharan Gupta
Mohammed Shafeequr Rehman Khan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gmg Techno Trades Pvt Ltd
Original Assignee
Gmg Techno Trades Pvt Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gmg Techno Trades Pvt Ltd filed Critical Gmg Techno Trades Pvt Ltd
Publication of EP4635840A2 publication Critical patent/EP4635840A2/de
Publication of EP4635840A3 publication Critical patent/EP4635840A3/de
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63HMARINE PROPULSION OR STEERING
    • B63H25/00Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/52Parts for steering not otherwise provided for
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63HMARINE PROPULSION OR STEERING
    • B63H20/00Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
    • B63H20/08Means enabling movement of the position of the propulsion element, e.g. for trim, tilt or steering; Control of trim or tilt
    • B63H20/12Means enabling steering
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63HMARINE PROPULSION OR STEERING
    • B63H25/00Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/06Steering by rudders
    • B63H25/08Steering gear
    • B63H25/12Steering gear with fluid transmission
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63HMARINE PROPULSION OR STEERING
    • B63H20/00Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
    • B63H20/08Means enabling movement of the position of the propulsion element, e.g. for trim, tilt or steering; Control of trim or tilt
    • B63H20/10Means enabling trim or tilt, or lifting of the propulsion element when an obstruction is hit; Control of trim or tilt

Definitions

  • the present invention relates to a steering cylinder. More particularly, the present disclosure relates to a steering cylinder and a steering system for an outboard engine for marine vessels such as boats.
  • Marine vessels such as boats are generally mounted with an outboard engine which is used to steer the boat.
  • Conventional outboard engine is generally supported by an engine bracket, which is supported pivotably on a tilt tube (a through tube).
  • the tilt tube extends along a horizontal tilt axis, around which the outboard engine may tilt.
  • the tilt tube extends through a clamp bracket, which is fixed to a boat hull.
  • the outboard engine may turn or steer around a steering axis, which is perpendicular to the engine bracket.
  • the boat may be steered either hydraulically by using a hydraulic cylinder or mechanically by using push-pull cables.
  • the hydraulic cylinder may include a hollow piston rod configured to be connected to a link arm.
  • the link arm may be coupled to the tiller arm which in turn may be coupled to a rudder.
  • the hydraulic cylinder may be operated to move the steering arm by changing the position of the link arm. upon movement of the link arm, the position of the rudder may be changed to steer the boat.
  • the hydraulic cylinder is generally installed co-axially with the outboard engine with the help of brackets which takes more space. Further, in case of replacement of the hydraulic cylinder, the whole outboard engine may need to be serviced at a service station which is time-consuming and expensive.
  • United States Patent Publication No. 62,76,977 discloses hydraulic actuator for an outboard motor system in which the cylinder and piston of the actuator are disposed within a cylindrical cavity inside a cylindrical portion of a swivel bracket.
  • the piston within the cylinder of the actuator is attached to at least one rod that extends through clearance holes of a clamp bracket and is connectable to a steering arm of an outboard motor.
  • the one or more rods attached to the piston are aligned coaxially with an axis of rotation about which the swivel bracket rotates when the outboard motor is trimmed.
  • the present disclosure relates to a steering cylinder for an outboard engine of a marine vessel.
  • the steering cylinder includes a first cylinder including a first fluid port and a second fluid port.
  • the first fluid port is positioned on a first end cap, and the first cylinder defines a first space.
  • the steering cylinder includes a second cylinder defining a first end and a second end opposite the first end.
  • the second cylinder defines a second space housing a hollow piston.
  • the second cylinder is configured to move with respect to the first cylinder.
  • the steering cylinder further includes a hollow piston rod positioned at least partially within the first space and defining a first end and a second end, the first end being fluidly coupled with the first fluid port and the second end being coupled to the hollow piston.
  • the steering cylinder is configured to actuate between an extended position and a retracted position to steer the marine vessel.
  • the second cylinder In the extended position, the second cylinder is configured to move away from the first end cap, and in the retracted position, the second cylinder is configured to move towards the first end cap.
  • the present disclosure relates to a steering system for steering an outboard engine of a marine vessel.
  • the steering system includes a tilt tube coupled to the outboard engine.
  • the steering system further includes a link arm defining a first end and a second end.
  • the steering system includes a tiller arm coupled between the second end of the link arm and a rudder of the outboard engine.
  • the steering system further includes a steering cylinder coupled to the first end of the link arm.
  • the steering cylinder includes a first cylinder including a first fluid port and a second fluid port.
  • the first fluid port is positioned on a first end cap, and the first cylinder defines a first space.
  • the steering cylinder includes a second cylinder defining a first end and a second end opposite the first end.
  • the second cylinder defines a second space housing a hollow piston.
  • the second cylinder is configured to move with respect to the first cylinder.
  • the steering cylinder further includes a hollow piston rod positioned at least partially within the first space and defining a first end and a second end, the first end being fluidly coupled with the first fluid port and the second end being coupled to the hollow piston.
  • the steering cylinder is configured to actuate between an extended position and a retracted position to steer the marine vessel. In the extended position, the second cylinder is configured to move away from the first end cap, and in the retracted position, the second cylinder is configured to move towards the first end cap.
  • the present disclosure relates to a marine vessel comprising an outboard engine mounted on a hull of the marine vessel.
  • the marine vessel includes a steering system for steering the outboard engine.
  • the steering system includes a tilt tube coupled to the outboard engine.
  • the steering system further includes a link arm defining a first end and a second end.
  • the steering system includes a tiller arm coupled between the second end of the link arm and a rudder of the outboard engine.
  • the steering system further includes a steering cylinder coupled to the first end of the link arm.
  • the steering cylinder includes a first cylinder including a first fluid port and a second fluid port. The first fluid port is positioned on a first end cap, and the first cylinder defines a first space.
  • the steering cylinder includes a second cylinder defining a first end and a second end opposite the first end.
  • the second cylinder defines a second space housing a hollow piston.
  • the second cylinder is configured to move with respect to the first cylinder.
  • the steering cylinder further includes a hollow piston rod positioned at least partially within the first space and defining a first end and a second end, the first end being fluidly coupled with the first fluid port and the second end being coupled to the hollow piston.
  • the steering cylinder is configured to actuate between an extended position and a retracted position to steer the marine vessel. In the extended position, the second cylinder is configured to move away from the first end cap, and in the retracted position, the second cylinder is configured to move towards the first end cap.
  • the marine vessel 100 may be a boat 100'.
  • the marine vessel 100 includes a hull 100a and an outboard engine 102 mounted on the hull 100a of the marine vessel 100.
  • the outboard engine 102 may be used to propel the marine vessel 100.
  • the outboard engine 102 may be used to propel the boat 100' in water.
  • the outboard engine 102 may include a propeller 104 and a steering system 108.
  • the propeller 104 may operate to propel the boat 12 in forward and reverse directions.
  • the steering system 108 may be configured to steer the outboard engine 102 of the marine vessel 100.
  • the steering system 108 may include a steering cylinder 112, a tilt tube 116, a link arm 120, a tiller arm 124, and a rudder 128.
  • the steering cylinder 112 may be coupled within the tilt tube 116.
  • the steering cylinder 112 may be a hydraulic cylinder which is hydraulically connected with a steering wheel 110 of the boat 100'.
  • a portion of the steering cylinder 112 may be positioned within the tilt tube 116.
  • the tilt tube 116 is coupled to the outboard engine 102 by using a bracket assembly 106 mounted on the outboard engine 102.
  • the bracket assembly 106 may be mounted on the outboard engine 102 by using a fastening means or by welding.
  • the tilt tube 116 may extends along a horizontal axis through the bracket assembly 106.
  • the bracket assembly 106 may be mounted on a hull 100a of the boat 100'.
  • the bracket assembly 106 may include a clamp bracket 114 and a swivel bracket 118.
  • the bracket assembly 106 may include a first clamp bracket 114' and a second clamp bracket 114".
  • the clamp bracket 114 may be fitted with fastening means such as bolts to the hull 100a of the boat 100.
  • the outboard engine 102 may be fitted on the swivel bracket 118.
  • the swivel bracket 118 and the clamp bracket 114 may be coupled together like a hinge and may rotate (0-90deg) about a hinge. In such an example, the tilt tube 116 may act like a hinge pin.
  • the link arm 120 defines a first end 138 and a second end 142 opposite the first end 138.
  • the steering cylinder 112 may be coupled to the link arm 120.
  • the first end 138 of the link arm 120 may be coupled to the steering cylinder 112 to move the link arm 120 by the steering cylinder 112.
  • the second end 142 of the link arm 120 may be coupled to the tiller arm 124.
  • the tiller arm 124 may be coupled between the second end 142 of the link arm 120 and the rudder 128 of the outboard engine 102.
  • the steering system 108 may include one or more hydraulic lines (not shown) connected between the steering cylinder 112 and the steering wheel 110 of the boat 100'.
  • the steering wheel 110 may be turned to steer the boat 100' in a desired direction.
  • the steering wheel 110 may allow the steering cylinder 112 to move in a direction relative to the steering wheel 110.
  • the steering wheel 110 may allow a hydraulic fluid to flow through the hydraulic lines to move the steering cylinder 112.
  • the steering cylinder 112 may be configured to then move the link arm 120 which in turn moves the tiller arm 124.
  • the tiller arm 124 may move the rudder 128 which steers the boat 100' in a desired direction.
  • the rudder 128 may turn the boat 100' in the direction in which the steering wheel 110 is turned.
  • the steering cylinder 112 may include a first cylinder 150 and a second cylinder 154.
  • the first cylinder 150 may be an outer cylinder 150' and the second cylinder 154 may be an inner cylinder 154'.
  • the first cylinder 150 may be coupled with the tilt tube 116 by fastening means such as a lock nut 174 as shown in FIG. 3 and 4 .
  • the outer cylinder 150' may define a first inner wall 152 and a first outer wall 152'.
  • the outer cylinder 150' may include a first end cap 162 on a first side 160.
  • the steering cylinder 112 may be coupled to the tilt tube 116.
  • the steering cylinder 112 may be coupled to the tilt tube 116 by using a lock nut 174.
  • the lock nut 174 may be configured to engage the steering cylinder 112 to a threaded portion 170 of the tilt tube 116.
  • the threaded portion 170 may be formed at ends 172 (for example, a first end 172' and a second end 172") of the tilt tube 116.
  • the tilt tube 116 may be coupled to an end cap 176.
  • the second end 172" of the tilt tube 116 may be coupled with the end cap 176.
  • the end cap 176 may prevent water, dirt and/or debris from entering the steering cylinder 112.
  • the first cylinder 150 further defines a first space 220.
  • the second cylinder 154 (e.g., the inner cylinder 154') may be partially mounted within the tilt tube 116.
  • the inner cylinder 154' may be configured to partially move within the tilt tube 116.
  • the second cylinder 154 (e.g., the inner cylinder 154) defines a first end 182 and a second end 184 opposite the first end 182.
  • the second cylinder 154 defines a second space 230.
  • the inner cylinder 154' may define a second inner wall 178 and a second outer wall 178' to define the second space 230.
  • the second space 230 may be volumetrically same as that of first space 220, thereby making it as a balanced-type steering cylinder 112.
  • the second cylinder 154 is configured to move with respect to the first cylinder 150. In an example, the second cylinder 154 may be configured to partially move within the first cylinder 150. In an example, the inner cylinder 154' may be configured to move within the outer cylinder 150'. For example, the inner cylinder 154' may define a stroke length, L , configured to move within the outer cylinder 150'. Further, the second end 184 of the inner cylinder 154' may be coupled to the link arm 120. In an example, the second end 184 of the inner cylinder 154' may be coupled to a rod end 186 which may be coupled to the first end 138 of the link arm 120.
  • the steering cylinder 112 may further include a first piston 188.
  • the first piston 188 may be positioned within the first space 220 and coupled to the first end 182 of the inner cylinder 154'.
  • the first piston 188 may be received within the outer cylinder 150'.
  • the first piston 188 may include a side wall 192 that may be in contact with the first inner wall 152 of the outer cylinder 150' and may move within the outer cylinder 150'.
  • the first piston 188 may include one or more piston seals 190 coupled between the first piston 188 and the first inner wall 152 of the outer cylinder 150'.
  • the first piston 188 may be a hollow piston 188'.
  • the steering cylinder 112 may further include a second piston 196 and a hollow piston rod 200 coupled to the second piston 196 and passes through the first piston 188.
  • the second piston 196 is a hollow piston 196'.
  • the second space 230 of the second cylinder 154 may house the hollow piston 196'.
  • the second piston 196 (e.g., the hollow piston 196') may be received within the inner cylinder 154'.
  • the hollow piston 196' may allow the hydraulic fluid to be passed therethrough.
  • the hollow piston 196' may be coupled with the second inner wall 178 of the inner cylinder 154' and may move within the inner cylinder 154'.
  • the second piston 196 may include one or more piston seals 194 coupled between the second piston 196 and the second inner wall 178 of the inner cylinder 154'.
  • the hollow piston rod 200 is positioned at least partially within the first space 220 of the first cylinder 150.
  • the hollow piston rod 200 defines a first end 200a and a second end 200b opposite the first end 200a.
  • the hollow piston rod 200 along with the second piston 196 may be fixed with respect to the first end cap 162 of the outer cylinder 150'.
  • the inner cylinder 154' may move over the second piston 196 (e.g., over the hollow piston 196').
  • the first cylinder 150 (e.g., the outer cylinder 150') further includes a first fluid port 204 and a second fluid port 208.
  • the first fluid port 204 is positioned on the first end cap 162.
  • the first fluid port 204 may be coupled to the hollow piston rod 200 which allows the hydraulic fluid to pass through the hollow piston rod 200 and into the inner cylinder 154'.
  • the first end 200a of the hollow piston rod 200 is fluidly coupled with the first fluid port 204 and the second end 200b of the hollow piston rod 200 is coupled to the hollow piston 196'.
  • the first fluid port 204 may be configured to allow the fluid to move into and out of the inner cylinder 154' and the hollow piston rod 200.
  • the second fluid port 208 may work as both an inlet and an outlet port depending upon desired motion of the steering cylinder 112.
  • the first piston 188 may move towards the first end cap 162 of the outer cylinder 150' (see FIG. 9 ).
  • the hydraulic fluid may move from the first fluid port 204 through the hollow piston rod 200 and the second piston 196 (e.g., hollow piston rod 200 and the hollow piston 196') to the rod end 186 to move the inner cylinder 154' away from the first end cap 162 (see FIG. 7 ).
  • the first fluid port 204 may be configured to allow the fluid to move into and out of the inner cylinder 154'.
  • the first fluid port 204 may work as both an inlet and an outlet port depending upon desired motion of the inner cylinder 154'.
  • the first piston 188 may move away from the first end cap 162 of the outer cylinder 150' (see FIG. 8 ).
  • the first piston 188 may move towards the first end cap 162 (see FIG. 7 ).
  • the steering cylinder 112 may further include a first hydraulic adapter 212 coupled to the first fluid port 204 and a second hydraulic adapter 216 coupled to the second fluid port 208.
  • the first hydraulic adapter 212 may be mounted on the first end cap 162 of the outer cylinder 150'.
  • the hydraulic lines may be coupled to the first fluid port 204 and the second fluid port 208.
  • the hydraulic lines may facilitate the hydraulic fluid to flow into and out of the steering cylinder 112 through the first fluid port 204 and the second fluid port 208.
  • the hydraulic fluid may be any fluid known in the art such as, but not limited to, a mineral oil or the like.
  • the steering cylinder 112 is configured to actuate between an extended position and a retracted position to steer the marine vessel 100.
  • the second cylinder 154 is configured to move away from the first end cap 162.
  • the inner cylinder 154' along with the first piston 188 is configured to move away from the first end cap 162.
  • the hydraulic fluid may flow into the second space 230 from the first fluid port 204 to move the first piston 188 along with the inner cylinder 154' away from the first end cap 162.
  • the hydraulic fluid flows into the second space 230 through the hollow piston rod 200 and the hollow piston 196'.
  • the steering cylinder 112 may be configured to turn the boat 100' upon an action of the steering wheel 110.
  • a helm pump (connected to the hydraulic lines and the steering wheel 110) may generate a pressure in the hydraulic fluid.
  • the hydraulic fluid may be moved within the steering cylinder 112 to turn the boat 100'.
  • the helm pump may facilitate the hydraulic fluid to be moved within the steering cylinder 112 depending on the direction (may be left or right) of the steering wheel 110 and/or a number of rotations of the steering wheel 110.
  • FIG. 7 refers to a first configuration of the steering system 108.
  • the hydraulic fluid may be supplied to the second fluid port 208.
  • the second fluid port 208 may act as an inlet port.
  • the hydraulic fluid fills within a first space 220 defined within the outer cylinder 150' and applies a force on the first piston 188.
  • the inner cylinder 154' may act as a piston rod for the first piston 188 and move the first piston 188 towards the first end cap 162 of the steering cylinder 112.
  • the hydraulic fluid already present in the inner cylinder 154' moves out from the first fluid port 204 thus acting as an outlet port.
  • the inner cylinder 154' may be retracted within the outer cylinder 150' towards the first end cap 162.
  • the movement of the inner cylinder 154' towards the first end cap 162 may turn the link arm 120 which in turn changes the position of the tiller arm 124.
  • the tiller arm 124 may then move the rudder 128 towards the starboard side, thus steering the boat 100' from starboard side to port side.
  • FIG. 8 refers to a second configuration of the steering system 108.
  • the hydraulic fluid is supplied to the first fluid port 204.
  • the first fluid port 204 may act as an inlet port.
  • the hydraulic fluid fills the second space 230 defined within the inner cylinder 154'.
  • the fluid may apply a force on the rod end 186.
  • the inner cylinder 154' may then move with the first piston 188 away from the first end cap 162 within the outer cylinder 150' of the steering cylinder 112.
  • the outer cylinder 150' and the inner cylinder 154' of the steering cylinder 112 are constructed in a way such that a volume of hydraulic fluid inside the outer cylinder 150' and the inner cylinder 154' is same.
  • an equal amount of force may be applied to the first piston 188 and the second piston 196 to move the boat 100' towards the port side and towards the starboard side.
  • the steering wheel 110 may be rotated for equal number of turns to steer the boat 100' in both directions, i.e., towards the port side and towards the starboard side.
  • FIG. 9 illustrates an alternate embodiment of the steering cylinder 112 shown in FIG. 3-6 .
  • the steering system 108 may include a steering cylinder 222.
  • the steering cylinder 222 may include similar components as that of the steering cylinder 112 and differ in that the steering cylinder 222 may include only a piston 232 and a hollow piston rod 200.
  • the steering cylinder 222 may include a first cylinder 224, and a second cylinder 228 configured to move with respect to the first cylinder 224.
  • the first cylinder 224 may define the first space 220.
  • the second cylinder 228 may extended or retracted with respect to the first cylinder 224. In an example, the second cylinder 228 may be partially disposed within the first cylinder 224. In an example, the second cylinder 228 may be positioned within the tilt tube 116.
  • the second cylinder 228 includes the piston 232 which is a hollow piston 232'. In an example, the second cylinder 228 defines the second space 230.
  • the second cylinder 228 may further include a rod 226 coupled to the hollow piston 232 such that the second cylinder 228 defines a third space 240.
  • the third space 240 may be fluidly coupled with the first space 220 through the hollow piston rod 200.
  • the rod 226 may be partially placed within the second cylinder 228 and may extend out of the second cylinder 228.
  • the second cylinder 228 may be coupled with the rod end 186 through the rod 226.
  • the steering cylinder 222 includes a single hydraulic adapter 212.
  • the first fluid port 204 and the second fluid port 208 may be formed on the hydraulic adapter 212.
  • the steering cylinder 222 may work in two configurations (for e.g., a first configuration and a second configuration).
  • FIG. 10 refers to the first configuration for the steering cylinder 222 of the steering system 108.
  • the first configuration of the steering cylinder 222 may be the extended position of the steering cylinder 222.
  • the second space 230 of the second cylinder 228 may be filled by the hydraulic fluid and may exert a force on the piston 232 away from the hydraulic adapter 212.
  • the movement of the piston 232 may move the rod end 186 away from the hydraulic adapter 212 to tilt the boat 100' in a direction respective to the force experienced on the piston 232.
  • the hydraulic fluid may exit the third space 240 to the first space 220 through the hollow piston rod 200 and finally out of the first fluid port 204.
  • FIG. 11 refers to the second configuration for the steering cylinder 222 of the steering system 108.
  • the second configuration of the steering cylinder 222 may be the retracted position of the steering cylinder 222.
  • the third space 240 of the second cylinder 228 may be filled by the hydraulic fluid and exert a force on the piston 232 towards the hydraulic adapter 212.
  • the movement of the piston 232 may move the rod end 186 towards the hydraulic adapter 212 to tilt the boat 100' in a direction respective to the force experienced on the piston 232.
  • the hydraulic fluid already present in the first space 220 may exit the first cylinder 224 from the second fluid port 208.
  • FIG. 12 illustrates an alternate embodiment of the steering cylinder 112 shown in FIG. 3-6 .
  • the steering system 108 may include a steering cylinder 234.
  • the steering cylinder 234 may include similar components as that of the steering cylinder 112 and differ in that the steering cylinder 234 may include a piston 242 such as a hollow piston 242', and a hollow piston rod 200 passing through the hollow piston 242'.
  • the steering cylinder 222 may include a first cylinder 244, and a second cylinder 248 configured to move with respect to the first cylinder 244.
  • the first cylinder 244 may define the first space 220.
  • the second cylinder 248 may extended or retracted with respect to the first cylinder 244. In an example, the second cylinder 248 may be partially disposed within the first cylinder 244. In an example, the second cylinder 248 may be positioned within the tilt tube 116. The second cylinder 248 may be coupled to the piston 242 which is the hollow piston 242'. In an example, the second cylinder 248 defines the second space 230.
  • the second space 230 may be fluidly coupled with the first space 220 through the hollow piston rod 200.
  • the second cylinder 228 may be coupled with the rod end 186.
  • the steering cylinder 234 includes the single hydraulic adapter 212.
  • the first fluid port 204 and the second fluid port 208 may be formed on the hydraulic adapter 212.
  • the steering cylinder 234 may work in two configurations (for e.g., a first configuration and a second configuration).
  • FIG. 13 refers to the first configuration for the steering cylinder 234 of the steering system 108.
  • the first configuration of the steering cylinder 234 may be the extended position of the steering cylinder 234.
  • the second space 230 may be filled by the hydraulic fluid and may exert a force on the piston 242 towards the hydraulic adapter 212.
  • the movement of the piston 242 may move the rod end 186 towards the hydraulic adapter 212 to tilt the boat 100' in a direction respective to the force experienced on the piston 242. At this time, the hydraulic fluid may exit the first cylinder 244 directly from the first fluid port 204.
  • FIG. 14 refers to the second configuration for the steering cylinder 234 of the steering system 108.
  • the second configuration of the steering cylinder 234 may be the extended position of the steering cylinder 234.
  • the first space 220 may be filled by the hydraulic fluid and exert a force on the piston 242 away from the hydraulic adapter 212.
  • the movement of the piston 242 may move the rod end 186 away from the hydraulic adapter 212 to tilt the boat 100' in a direction respective to the force experienced on the piston 242 and the hydraulic fluid may exit the second space 230 through the hollow piston rod 200 and finally out of the second fluid port 208.
  • the present disclosure provides the outboard engine 102 and the steering system 108.
  • the steering system 108 includes the steering cylinder114 112, 222, 234 configured to steer the boat 100' toward the port side or the star board side.
  • the steering cylinder 112, 222, 234 may be disposed at least partially within the tilt tube 116.
  • the steering cylinder 112, 222, 234 is configured to partially fit inside the tilt tube 116.
  • the fitment of the steering cylinder 112, 222, 234 provides lesser space requirements as compared to conventional steering cylinders. Hence the steering cylinder 112, 222, 234 may be mounted on any marine vessel 100 irrespective of the size constraints which was there in conventional marine vessels.
  • the configuration of the steering cylinder 112, 222, 234 inside the tilt tube 116 also provides on-site assembly and disassembly of the steering cylinder 112, 222, 234, thus doesn't require dismantling of the entire outboard engine 102.
  • the steering cylinder 112, 222, 234 may be attached to the tilt tube 116 by any suitable fastening means such as the lock nut 174 fastened on the threaded portion 170 of the tilt tube 116.
  • the steering cylinder 112 may be a balanced-type steering cylinder 112 which facilitates the equal number of turns of the steering wheel 110 from port side to starboard side and vice versa for steering the boat 100'.
  • the balanced-type steering cylinder 112 may facilitates a precise and responsive steering, especially at high speeds.
  • the balanced-type steering cylinder 112 may also facilitate reduced torque at the helm of the boat 100'.
  • the balanced-type steering cylinder 112 may also help the user to operate the boat 100' with more precision and ease.
  • the steering cylinder 112 may not be limited to a particular steering system and may be used with any type of steering system such as, but not limited to, a power assisted hydraulic system, a power assisted electrical system, steering systems with auto pilot arrangement, and may be coupled with a navigation system or the like.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Actuator (AREA)
EP25192303.3A 2025-05-12 2025-07-29 Lenkzylinder und lenksystem für aussenbordmotoren Pending EP4635840A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN202521045528 2025-05-12

Publications (2)

Publication Number Publication Date
EP4635840A2 true EP4635840A2 (de) 2025-10-22
EP4635840A3 EP4635840A3 (de) 2026-02-25

Family

ID=97171083

Family Applications (1)

Application Number Title Priority Date Filing Date
EP25192303.3A Pending EP4635840A3 (de) 2025-05-12 2025-07-29 Lenkzylinder und lenksystem für aussenbordmotoren

Country Status (2)

Country Link
US (1) US20250353583A1 (de)
EP (1) EP4635840A3 (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6276977B1 (en) 2000-04-17 2001-08-21 Brunswick Corporation Integrated hydraulic steering actuator

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3335642A (en) * 1965-01-08 1967-08-15 Borje O Rosaen Cylinder construction
US3631833A (en) * 1969-06-16 1972-01-04 Outboard Marine Corp Marine propulsion power-assist steering mechanism

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6276977B1 (en) 2000-04-17 2001-08-21 Brunswick Corporation Integrated hydraulic steering actuator

Also Published As

Publication number Publication date
EP4635840A3 (de) 2026-02-25
US20250353583A1 (en) 2025-11-20

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