The present invention relates to systems for controlling and mechanisms for mounting outboard motors onto boats. More specifically, the present invention relates to a modular jack plate with precision vertical adjustment features for the height of an outboard motor.
During operation of a boat powered by an outboard motor, it is often desirable to raise or lower the outboard motor. For example, when operating a boat in shallow water or removing a boat from the water with a submersible boat trailer, it is often necessary to raise the motor so that the propeller and rudder are not damaged by the bottom of the body of water. In other instances, it may be desirable to raise the motor while operating the boat at high speeds to reduce the amount of drag created by the presence of the motor in the water. Raising the motor using the tilt control is not always optimal as the tilting rotates the force vector provided by the propeller in the water away from horizontal.
Jack plates are known that allow raising and lowering of outboard motors without adjusting the trim; see, for example, U.S. Pat. Nos. 8,267,025; 9,403,587; and 10,850,821 owned by the owner of this application. Such jack plates have provided enhanced boating performance to enthusiasts. When at speed, raised jack plates can remove much of the lower unit from the water reducing drag and increasing speed. Lowering the propeller in rough water provides smoother operation. The setback of the engine from the transom by the jack plate can allow the propeller to be placed in clear undisturbed water allowing the engine to work more efficiently and improve handling. However, setting the engine too far rearwardly can move the center of gravity of the engine too far rearwardly, raising the front of the boat and detrimentally effecting handling and performance. With current jack plates, modifying the setback provided by the jack plate usually involved installing spacers between the existing jack plate and the transom. Such spacers were typically C-shaped and added another set of fasteners and added weight. The additional fasteners were not always readily accessible and adjusting the setback was a difficult process.
The boating industry continues to seek further improvements in operation performance of boats and the associated equipment. Competitive fishing with increased television coverage and sizeable prize money purses has brought many new competitors to the sport along with significant expenditures on equipment for providing a competitive edge. From a performance perspective the capability to get from one spot to another with maximum ease and speed is paramount as seconds can matter in competitive fishing. Starting from a dead stop and getting to maximum speed in the minimal amount of time requires motor trim and height adjustments before starting, as the boat planes out, and during increases in speed. Typically, these adjustments are done on the fly and “by feel,” without precision settings.
Considering the enhanced equipment associated with competitive fishing and demands of sophisticated users of boating equipment, any advancement in the precision operation of jack plates, and in the ease of tuning of jack plates, for example changing the setback distances for optimizing performance, would be well received by the sophisticated boating consumers. Moreover, any economies in manufacturing, simplifying designs without sacrificing performance, lowering manufacturing costs are always well received.
An adjustable and modifiable jack plate for positioning and mounting an outboard motor to the transom of a boat. The jack plate has a lift plate to attach the outboard motor, the lift plate having cylindrical polymer bearings on each of two lateral sides, the two bearings slidingly received in bearing retainers configured as a pair of C-shaped channel members, each channel member having a unitary vertical flange. Each flange being connected to a cooperating flange of a pair of L-shaped wing brackets, the cooperating flanges forming a lap joint. The L-shaped brackets connectable to the boat transom and providing a setback distance for the outboard motor. A bridging member is fastened to each of the pair of L-shaped brackets and a linear actuator with an electric motor is connected to the bridging member and the lift plate to raise and lower the lift plate relative to the transom. The L-shaped brackets are easily replaced with different L-shaped brackets having a different set back distance for optimizing performance. A user interface has up and down buttons, a plurality of memory buttons for returning the lift plate to specific stored positions, and a numeric readout the provides a specific lift measurement in units such as inches.
A feature and advantage of embodiments is that the wing brackets connecting to the bearing retainers and the boat transom may be readily swapped out with different sized wing brackets and performance with both compared thereby providing an optimization of performance. A feature and advantage is that the bearing retainers and wing brackets connect with a lap joint that is robust and easily connected and disconnected with the bolt/washer/nut easily accessible.
Optimization during operation includes finding optimal trim vs. motor height positions, an optimal height position is more readily remembered and identified by a numerical readout that correlates to an actual physical measurement, rather than a relative indicator.
A feature and advantage of embodiments is that the engine height adjustment for starting from a dead stop can be initiated before the boat operator is in the driver's seat by simply pressing a memory button on a hand held wireless user interface. By the time the user is seated in the driver seat the engine is in the optimal position for an immediate start to get to a quick plane. Another touch of a memory button can put the engine height at an optimal position for a high speed trip to the next fishing spot.
In an embodiment, a jack plate comprises a mounting assembly comprising a first spacing bracket, a second spacing bracket, and extending between the first spacing bracket and the second spacing bracket. The first spacing bracket defines a first channel and the second spacing bracket defines a second channel with the first channel and the second channel opening toward one another. The jack plate further includes a lift plate assembly that is movable relative to the mounting plate. The lift plate assembly comprises a first slider slidingly received in the first channel, a second slider slidingly received in the second channel, and a lift plate extending between the first slider and the second slider. The jack plate comprises an actuator operably coupled between the mounting assembly and the lift plate assembly for moving the lift plate assembly relative to the mounting assembly.
In embodiments, a spring is operably couplable between the cross member and the lift plate assembly, the spring for applying a biasing force between the lift plate and the cross member for lessening loading on the powered actuator. This allows use of a lower powered actuator and/or can extend the life of the actuator. The spring can be an air spring, for example.
In embodiments, a jackplate system has a lift plate raisable and lowerable by way of an electric linear actuator and has a user interface that has an up and down controls, memory buttons for saved height positions, and a precise readout of height coupled with the encoder of the servomotor.
In embodiments, the jackplate performance can be optimized by replacing wing sections of the jack plate with longer or shorter wing sections without removing the outboard from the lift plate or the lift plate from the C-shaped channel members. The bolts and nuts connecting C-shaped channel members from the L-shaped wing brackets can be removed and the actuator may be disconnected by unscrewing the two screws that connect each wing bracket to the actuator bar. The inventor has discovered sufficient structural support is provided by the two L-shaped brackets bolted to the transom and a single cross member that connects the two L-shaped brackets, the single cross member also providing the fixed base, relative to the transom, for the linear actuator.
A feature and advantage of embodiments is that the operational axis of the linear actuator is substantially parallel to the operational axis of the lift plate providing a maximum efficiency in transferring the power of the actuator to the lifting force to raise and lower the outboard motor. In embodiments, swapping out wing brackets to adjust and optimize the setback position of the outboard motor does not alter the substantially parallel relationship of the lift plate operational axis and the linear actuator operational axis.
Embodiments of the invention will be described with respect to the figures, in which like reference numerals denote like elements, and in which:
While the present invention is amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail. It should be understood, however, that the intention is not to limit the present invention to the particular embodiments described. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present invention.
Referring to
Referring to
User interface 154 may be a handheld battery operated device. In embodiments, user interface 154 may have a width between 2 and 3 inches and a length between 4 and 5 inches. In embodiments, user interface 154 may have a width of about 2.24 inches and a length of about 4.1 inches. User interface 154 may include directional controls 151, 153, a plurality of memory buttons 155, and a display 157. In embodiments, directional controls may include an “up” control 151 and a “down” control 153. In embodiments, user interface 154 may include one, two, or three memory buttons 155. In embodiments, user interface 154 may include more than three memory buttons. Display 157 may be any suitable unit capable of displaying numerals for indicating a position of linear actuator 170 or other error codes or informational data such an analog or LED display. In embodiments, display 157 may be a bistable LCD device such as an ePaper or eInk display. Such displays require power only to set an image on the display, and do not require any further power to hold that image in place. Accordingly, an ePaper or eInk display could, for example, display the current position of the linear actuator to the driver without draining the user interface 154 battery.
User interface 154 remains in an “off” state until a button 151, 153, 155 is pressed. Once a button 151, 153, 155 is pressed, if the user interface 154 does not receive a return message from controller module 160, user interface 154 will display “LINK ERROR,” or some other message indicating an error, on display 157. For example, “LINK ERROR” would be shown on display 157 if there is no power to controller module 160. In embodiments, “LINK ERROR” is displayed 10 seconds after pressing any button 151, 153, 155 and not receiving a message from controller module 160. In embodiments, user interface 154 checks for signals from wireless transceiver 166 about 10 times per second. User interface 154 may communicate with wireless transceiver 166 through known protocols such as RF, Bluetooth, WiFi, or the like. Controller unit 160 responds to the initial button press with a signal indicating a current status. The status may either be “lost” or an indicator that controller unit 160 knows its current position. If controller unit 160 knows its position, control unit 160 enters into a normal operating mode. If the actuator control is lost, the display 157 will show “HOMW,” or some similar indicator, at which point the linear actuator 170 can only be moved down to the 0.00″ point. Once motor feedback 173 detects the zero point, user interface 154 is set to a normal operating mode
During normal operation the user interface 154 will display the jack plate position in ¼″ increments. Pressing and holding either up or down buttons 151, 153 will move the linear actuator 170 smoothly from top to bottom. Once up or down buttons 151,153 are released, the motor control 171 stops linear actuator 170 at the next closest ¼″. For example, if the jack plate is at 1.00″ and moving down towards 0.00″, and if display 157 shows 0.75″ when down button 153 is released, the transom will stop at 0.50″. Pressing one of the plurality of memory buttons 155 will automatically send the jack plate a predefined position associated with the button 155, regardless of whether the predefined position is up or down from the present position of the jack plate. Positions are associated with buttons 155 and stored into memory 175 by first using the directions buttons 151,153 to move the jack plate up or down to the desired location. Once the jack plate is in the desired position, pressing and holding the memory button 155 stores the position into memory 175 and associates the stored position with the memory button 155. Subsequently pressing memory button 155 will return the jack plate to the associated stored position.
At any point that the jack plate is in motion, should the jack plate stop moving due to unforeseen circumstances, the display 157 will show “STALL,” or some similar indicator message. Unforeseen circumstances may include, for example, a jam of the actuator or shaft, a loss of communication, a wire break, or the like. Pressing any button 151, 153, 155 on the user interface 154 will cause controller unit 160 to clear the stall and move the jack plate in a manner appropriate for the button pressed. If at any time communication is lost for more than 100 attempts the display 157 will show “LINK ERROR,” or some message indicating an error. In the event of any “LINK ERROR,” the user interface 154 enters a sleep mode. The user interface 154 may also enter sleep mode after 15 seconds of inactivity. When in sleep mode, pressing any button 151,153,155 transitions the user interface 154 into a wake mode, which then attempts to find the controller unit 160 and reestablish communication with wireless transceiver 166.
In embodiments, buttons 151,153,155 may be incorporated into a circuit board, in further communication with a microprocessor and a battery. Display 157 may also be integrated into the circuit board. In embodiments, graphic overlay 159 may be placed over the circuit board and buttons 151,153,155. Graphic overlay 159 may incorporate indicia indicated the function of buttons 151,153,155. For example, directional button 151 may have the word “UP” or a graphical indicator, such as an upward pointing arrow, printed on the graphic overlay 157. In embodiments, portions of graphic overlay 159 over the buttons 151,153,155 may use a pillow emboss to create a tactile feel when operating user interface 154. While steering a boat, particularly in competition settings, it can be beneficial to quickly operate user interface 154 to move the jack plate by feel without the need to avert ones gaze from the water or other surroundings. In embodiments, a pillow emboss may be between 0.005 and 0.020 inches high. In embodiments, a pillow emboss may be between 0.010 and 0.015 inches tall. In embodiments, additional support structure, such as metal domes, may be used surround buttons 151,153,155. In embodiments, graphic overlay 159 may be laminated, or incorporate materials such as Melinex® film, to protect user interface 154 from water or other harsh conditions experienced while boating. The following U.S. patents and U.S. patent publications contain content, aspects, components and functionalities relating to or applicable to control of jack plates and/or outboard motors and are incorporated by reference herein in their entireties for all purposes: U.S. Pat. Nos. 9,745,036; 10,281,928; 9,896,173; 8,882,551; 6,126,498; 4,861,292; 7,146,786; 4,858,481; 5,142,473; 9,896,174; 10,118,681; and US Patent Publication 20180154998.
Referring to
The bearing retainers are secured to L-shaped wing brackets 240, 241 at the flange 226 which cooperates with a corresponding flange 244 on the wing brackets to form a lap joint 246. A plurality of linearly aligned holes 248 in the bearing retainer flange match with a plurality of linearly aligned holes 249 in the wing bracket flange 244 and a plurality of nut/bolt/washer assemblies 250 secure the joint 246. A bridging or cross member 260 extends between the pair of wing brackets 240, 241 and has a rectangular shape from the end view with planar end surfaces 264 that interface with the planar inside surfaces 267 of the wing brackets. The cross member is spaced rearwardly (away from the boat transom) from the shorter leg 269 of the L-shaped wing brackets as best shown in
The linear actuator 170 extends between the lift plate 204 and the cross member 260. A mounting bracket 278 fits into a recess 279 on the lifting plate and is secured to the lifting plate 204 with a plurality of bolt/nut/washer combinations 280. A pin 282 pivotally secures the upper connecting shaft 283 of the actuator to the upper mounting bracket 278 and the pin may be held in place with a cotter key. A lower bracket 286 is connected to the cross member 260 with four bolt/washer/nut combinations 290. The lower bracket is secured to the lower actuator shaft 178 by way of pin 289.
Suitable electro-mechanical linear actuators are available through Linak A/S of Nordborg, Denmark. See U.S. Pat. Nos. 10,516,318; 9,312,738; 8,725,438; and 8,302,227, all of which are incorporated by reference herein for all purposes.
The configuration of the upper bracket and lower bracket positions the actuator axis α2 to be substantially parallel of the lift plate operational axis α2 providing for maximum power transfer and efficiency from the linear actuator to the lift plate. In embodiments, “substantially parallel” means the axis α1 and α2 are within 7 degrees. In embodiments, “substantially parallel” means the axis α1 and α2 are within 4 degrees. In embodiments, “substantially parallel” means the axis α1 and α2 are within 2 degrees. Even when the L-brackets are swapped out, as described below, this substantially parallel orientation is maintained, thereby continuing to provide the same maximum lifting power and efficiency from the actuator.
In embodiments, hydraulic linear actuators may be utilized rather than the electromechanical actuators illustrate and/or described herein.
Referring to
In embodiments, gas springs as illustrated in U.S. Pat. No. 10,850,821 may be used to reduce the required power of the linear actuator and/or extend the potential life of same. Said patent, owned by the owners of this application, is incorporated by reference herein for all purposes.
The following U.S. patents and U.S. patent publications contain content, aspects, structure, components, and functionalities relating to or applicable to jack plates and/or outboard motors and are incorporated by reference herein in their entireties for all purposes: U.S. Pat. Nos. 8,657,637; 4,995,839; 5,782,662; 5,704,308; 5,017,165; 9,284,031; 9,896,173; 8,267,025; 9,403,587; and US20100127150.
Although the present invention has been described with reference to particular embodiments, those skilled in the art will recognize that changes may be made in form and substance without departing from the spirit and scope of the invention. The embodiments described above are intended to be illustrative and not limiting.
The present application claims the benefit of U.S. Provisional Patent Application No. 63/164,327, filed Mar. 22, 2021, and of U.S. Provisional Patent Application No. 63/249,939 filed Sep. 29, 2021, all of which are hereby incorporated by reference herein in their entireties.
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