US3858101A - Shift motor actuator circuit - Google Patents

Shift motor actuator circuit Download PDF

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Publication number
US3858101A
US3858101A US00377027A US37702773A US3858101A US 3858101 A US3858101 A US 3858101A US 00377027 A US00377027 A US 00377027A US 37702773 A US37702773 A US 37702773A US 3858101 A US3858101 A US 3858101A
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US
United States
Prior art keywords
marine propulsion
circuit
armature
drive
propulsion apparatus
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.)
Expired - Lifetime
Application number
US00377027A
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English (en)
Inventor
R Schmiedel
R Staerzl
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Brunswick Corp
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Brunswick Corp
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 Brunswick Corp filed Critical Brunswick Corp
Priority to US00377027A priority Critical patent/US3858101A/en
Priority to CA200,478A priority patent/CA1028035A/en
Priority to AU69231/74A priority patent/AU6923174A/en
Priority to FR7418223A priority patent/FR2235831A1/fr
Priority to SE7406969A priority patent/SE381015B/xx
Application granted granted Critical
Publication of US3858101A publication Critical patent/US3858101A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/21—Control means for engine or transmission, specially adapted for use on marine vessels
    • B63H21/213—Levers or the like for controlling the engine or the transmission, e.g. single hand control levers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/03—Arrangements for regulating or controlling the speed or torque of electric DC motors for controlling the direction of rotation of DC motors

Definitions

  • a marine propulsion outboard or stem drive includes a motor driven, hydraulic shift mechanism.
  • a DC motor includes the conventional separate reverse winding and forward winding, each of which is connected individually in series with the motor armature to a battery through motor driven limit switches to stop at neutral, forward or reverse drive positions.
  • the armature is connected to drive a valve for actuating a hydraulic shift unit.
  • a resistor and a diode is connected in parallel between the power side of each winding and ground. The resistor acts as an electrical load and eliminates hunting of the drive system and the repeated operation of the limit switches.
  • the resistors employed are relatively low wattage type so as to burn open in a relatively short period and without a flame or mass heat characteristic capable of igniting fuel fumes associated with recreational type marine.
  • This invention relates to a motor energizing circuit and particularly to a direct current motor for driving the shift mechanism of marine propulsion apparatus.
  • Marine drive systems including outboard motors, stern drive units and the like are widely and advantageously employed, particularly in the recreational boating area.
  • the throttle and directional controls are located to the forward portion of the boat. Shifting of the drive generally employs mechanical positioning of the gear mechanism in the aft mounted drive apparatus between a neutral position, a forward drive position and a reverse drive position.
  • Conventionally various push-pull cable arrangements have been provided, which mechanically connect the forward located controls to the operating mechanism located in the aft portion of the I boat.
  • An improved electrically coupled shift mechanism for marine propulsion units is disclosed in the copending application of Russel J. Barnes entitled Electrically Controlled Shift Mechanisms for Marine Propulsion Units, which was filed on May 29, 1973, with Ser.
  • a plurality of snap action switches are connected to conjointly control and establish anyone of three output signals, each of which is related directly to a corresponding drive position.
  • the three outputs are uniquely related to the neutral position, the forward drive position, and the reverse drive position.
  • the inputs are applied to a high, speed DC motor shift operator which is responsive to each of the inputs to drive to a preselected position.
  • the motor control includes internal switching which establishes the three positions in response to the corresponding inputs to the operator.
  • the shift motor is coupled to set a hydraulic valve system for properly actuating a hydraulic shift mechanism which actually moves a coupling gear between the three positions.
  • the concept of that application has been found to provide a very rapid, reliable and relatively inexpensive shift control.
  • the electrical remote control concept is particularly desirable in that the switch units can be mounted immediately adjacent the forward portion of the control assembly and readily connected through a very simple wiring cable to the aft mounted unit.
  • the systems are generally constructed with fluid tight enclosure means to prevent adverse damaging effect as a result of the high moisture content.
  • heat sources are included in the mechanism special problems may arise in assuring heat dissipation of a characteristic so as to avoid the generation ,of abnormal damaging heat levels.
  • the high speed drive motor included a tendency for the unit to hunt" as each of the three possible settings was reached.
  • the shift linkage tended to oscillate about the preset position. Although this did not effect the actual shifting and provided a completely satisfactory establishment of the neutral, forward and reverse gear positions, the oscillations were fed or reflected back into the internal switching mechanism.
  • the present invention is particularly directed to a simple and reliable electrical means for essentially eliminating the hunting characteristic of the driving shift motor and thereby significantly increasing the operating life of the shift control mechanism.
  • an electrical damping circuit means is interconnected to the motor terminals to modify the motor driving characteristics and in particular to essentially eliminate the hunting motor characteristic of the drive unit. More particularly in accordance with the present invention as applied to the direct current drive motor, a resistance damping network is connected across the motor.
  • the resistant elements function as an electrical load which provides compound motor characteristics decreasing the no-load speed of the motor. Further, the resistance elements act to create dynamic braking in the event the motor is functioning to generate power. Further, applicants analysis noted the creation of negative voltage spikes or signals generated within the motor which appear to adversely affect the desired smooth operation of the motor drive. Applicant has found that such extraneous signals are reliably eliminated by connecting of properly polarized diode means in parallel with the modifying resistant means and the motor.
  • the DC motor includes the conventional separate reverse winding and forward winding each of which is connected individually in series with the armature.
  • the power is applied across the appropriate winding, and armature in series through the motor driven limit switches.
  • a resistor and a diode are connected in parallel between the power side of each winding and ground.
  • the resistors employed are relatively low wattage type and under such conditions, burn open in a relatively short period. However, there is no flame or mass heat characteristic and consequently there is no danger of an explosive heat source created. If the linkage is unjammed, the motor continues to operate to provide shifting although the hunting characteristic is encountered with a reduction in the life unit.
  • the present invention provides a relatively simple and inexpensive means for creating a stable electric motor driven shifting mechanism with an improved life and one which is particularly adapted to modification of presently existing units as well as the use of mass produced motors for initial manufacture of the shift control drive.
  • FIG. 1 is a diagrammatic illustration of a control system for a marine propulsion unit with an electrically responsive remote shift control.
  • FIG. 2 is a schematic illustration of a drive motor and associated dampened circuit constructed in accordance with the present invention.
  • FIG. 3 is a typical illustration of a motor characteristic without the damping modification shown in FIG. 2, and;
  • FIG. 4 is a typical characteristic of the motor with the electrical damping circuit of FIG. 1.
  • FIG. 1 DESCRIPTION OF ILLUSTRATED EMBODIMENT
  • a shifting control for a stern drive unit 1 secured to the aft end of a boat 2.
  • a single lever control unit 3 is mounted in the forward portion of the boat and connected through a suitable coupling cable 4 to actuate a motor driven shift mechanism or unit 5.
  • the cable 4 is an electrical cable providing connection between control switches 6 mounted in forward control unit 3 for selectively supplying power to anyone of three inputs to the motor driven shift unit 5.
  • the switching system may for example be constructed as taught and shown in the previously referred to copending application of Barnes.
  • the shift unit includes a direct current motor 7 which for marine outboard and/or stern drive units may typically be a 12 volt motor.
  • the motor 7 includes an armature 8 which is coupled to position a hydraulic valve 9 for affecting movement of the shift linkage and gear mechanism 10.
  • a forward field winding 11 is connected in series with the armature 8 to create energization of the motor 7, with the armature rotating in the direction placing the valve 9 in a forward drive position.
  • the one side of the armature 8 is grounded and the opposite side is connected in series with the forward winding 11 to a forward limit switch 12 of a switch assembly which is connected through a coupling circuit to a battery 13.
  • a reverse winding 14 is similarly connected between the ungrounded side of the armature 8 and a reverse switch 15 of the limit switch assembly. Energization through the reverse winding 14 results in a corresponding opposite rotation of the armature 8 and placement of valve 9 in the reverse drive position.
  • the deenergization of the circuits of forward and reverse winding 11 and 14 is selectively controlled by the limit switches 12 and 15.
  • the motor armature 8 opens the corresponding switch when each position is reached.
  • the switches are connected to power through a coupling circuit 16 which is controlled by the input switches 6 of the forward by located control unit 3 to provide energization of one of the windings 11 and 14 to drive the armature 8 until the desired position is established.
  • An internal switch not shown, provides for the neutral position.
  • Any suitable interconnecting circuit can of course be employed which employs motorcoupled limit switches.
  • a motor-limit switch unit manufactured and sold by Prestolite Company, a division of Ultra Corporation has been satisfactorily employed.
  • damping circuits 21 and 22 are connected, one each, between the input of each of the reverse and forward windings 11 and 14 to ground and thus across the operating motor circuit for each direction.
  • Each of the damping circuits 21 and 22 is identical and consequently that for the forward winding 11 is described in detail.
  • the dampening circuit 21 first includes a small resistor 23 connected at one end between the junction of switch 12 and the winding 11 and the opposite end to ground. Resistor 23 is directly in parallel with the series connected forward winding 11 and the armature 8. Further, in parallel with the dampening resistor 23 and thus also across the series connected forward winding 11 and armature 8, a high voltage, low amperage diode 24 is connected. The diode 24 is connected with its anode connected to ground and its cathode connected to the power or positive side of the forward winding 11 such that the diode 24 is reverse biased with respect to the applied voltage and thus does not normally conduct.
  • any negative voltage signals or transients generated within the motor 7 however forward biases the diode 24, which presents a relatively low resistance for such signals and are readily conducted by the diode.
  • the diode for a typical l2-volt motor is 1,000 volt-amp diode.
  • resistors 23 and 23' are selected as low wattage resistors so to prevent prolonged significant heat generation even in the presence of a locked motor condition.
  • a marine propulsion apparatus having a shift mechanism movable between plurality of drive positions by an electrically driven actuator having limit switches actuated at each of the said positions to terminate operation of the actuator, said actuator comprising an electrical drive means having a power input means connected in circuit with said limit switches,
  • said actuator having means tending to produce oscillation about each driven position and thereby produce an oscillatory switch operation in response to establishing of said drive positions, said oscillatory switch operation functioning to significantly reduce the life of the actuator, and an electrical dampening circuit means connected in parallel with said electrical drive means and selected to prevent said oscillatory switch operation.
  • dampening circuit means includes relatively low wattage resistors means and burning open with essentially zero watt level to prevent creation of heat energy capable of igniting gasoline fumes.
  • said drive means is a direct current motor and said dampening circuit means includes a resistor means in parallel with a diode means, said diode means being connected to conduct transient voltage signals developed within said drive means.
  • said drive means includes a direct current motor means having an armature and a pair of paralleled windings connected in circuit with said limit switches, a control linkage coupled to said armature and said electrical dampening circuit means, including a first resistor connected in parallel with said armature and a first of said windings and including a second resistor connected in parallel with the armature, and the second of said windings, said resistors being selected to prevent said oscillatory switch operation.
  • the marine propulsion apparatus of claim 4 having a battery power supply of a selected maximum output voltage wherein said first and second resistors have a wattage rating less than that established with the full voltage applied directly across one of said resistors.
  • a marine propulsion apparatus having a shift mechanism movable between a neutral position, a forward drive position and a reverse drive position by an electrically driven actuator having limit switches actuated at each of the said positions to terminate operation of the actuator, said actuator comprising an electrical drive means having a power input means connected in circuit with said limit switches, said actuator having means tending to produce oscillation about each driven position and thereby produce an oscillatory switch operation in response to establishing of said shift posi tions, said oscillatory switch operation functioning to significantly reduce the life of the actuator, and an electrical dampening circuit means connected in parallel with said electrical drive means and selected to prevent said oscillatory switch operation.
  • said dampening circuit means includes a resistance means of a relative low wattage rating and burning open with essentially a zero heat level to essentially completely eliminate the capability of igniting gasoline fumes.
  • said dampening circuit means includes a diode means connected to conduct transient voltage signals developed within said drive means.
  • said electrical drive means includes a direct current motor means having winding means connected in circuit with said limit switches, said electrical dampening circuit means being connected in parallel with said winding means.
  • said direct current motor means includes an armature connected in a first series circuit with a forward winding means and in a second series circuit with a reverse winding means and each circuit connected to one of said limit switches, said electrical dampening means including a pair of circuit means connected one each in parallel with each of said series circuits and in series with the corresponding limit switches.
  • each of said dampening circuit means includes a resistor means in parallel with a diode means.
  • each resistance means has relative low wattage rating and burning open with essentially a zero heat level to essentially completely eliminate the capability of igniting gasoline fumes.
  • said shift mechanism includes a hydraulic actuator having a mechanical valve means for establishing the shift positions and said drive means includes a direct current motor means having an armature and a pair of paralleled windings connected in circuit with said limit switches, a linkage coupling said armature to said valve means, and said electrical dampening circuit means including a first resistor connected in parallel with said armature and a first of said windings and including a second resistor connected in parallel with the armature, and the second of said windings, said resistors being selected to prevent said oscillatory switch operation.
  • dampening circuit means includes first and second diode means connected in parallel one each with said first and second resistors to conduct transient voltage signals developed with said motor means.
  • the marine propulsion apparatus of claim 13 having a battery power supply of a selected maximum output voltage wherein said first and second resistors are a wattage rating less than that established with the full voltage applied directly across one of said resistors.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Power Engineering (AREA)
  • Control Of Direct Current Motors (AREA)
US00377027A 1973-07-06 1973-07-06 Shift motor actuator circuit Expired - Lifetime US3858101A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US00377027A US3858101A (en) 1973-07-06 1973-07-06 Shift motor actuator circuit
CA200,478A CA1028035A (en) 1973-07-06 1974-05-22 Shift motor actuator circuit
AU69231/74A AU6923174A (US06826419-20041130-M00005.png) 1973-07-06 1974-05-22
FR7418223A FR2235831A1 (US06826419-20041130-M00005.png) 1973-07-06 1974-05-27
SE7406969A SE381015B (sv) 1973-07-06 1974-05-27 Elektriskt drivet manoverdon for en batmotors vexlingsmekanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00377027A US3858101A (en) 1973-07-06 1973-07-06 Shift motor actuator circuit

Publications (1)

Publication Number Publication Date
US3858101A true US3858101A (en) 1974-12-31

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ID=23487466

Family Applications (1)

Application Number Title Priority Date Filing Date
US00377027A Expired - Lifetime US3858101A (en) 1973-07-06 1973-07-06 Shift motor actuator circuit

Country Status (5)

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US (1) US3858101A (US06826419-20041130-M00005.png)
AU (1) AU6923174A (US06826419-20041130-M00005.png)
CA (1) CA1028035A (US06826419-20041130-M00005.png)
FR (1) FR2235831A1 (US06826419-20041130-M00005.png)
SE (1) SE381015B (US06826419-20041130-M00005.png)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4403970A (en) * 1981-07-30 1983-09-13 Outboard Marine Corporation Marine propulsion unit having ignition interruption means to assist transmission shifting
US20050170715A1 (en) * 2003-07-17 2005-08-04 Nhk Teleflex Morse Co., Ltd. Shift operation apparatus for outboard motor, electronic remote control apparatus for medium-sized boat, and engine control apparatus
US7291048B1 (en) 2007-04-13 2007-11-06 Brunswick Corporation Actuator device for a marine propulsion transmission
US7632161B1 (en) 2007-09-05 2009-12-15 Brunswick Corporation Marine transmission actuator
US10118683B1 (en) 2017-08-21 2018-11-06 Brunswick Corporation Outboard motors having flexible connector assembly for shift actuation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1966077A (en) * 1931-02-17 1934-07-10 Radio Patents Corp Surge absorbing apparatus
US2854660A (en) * 1956-03-29 1958-09-30 Sparks Withington Co Horn circuit
US2914683A (en) * 1956-08-06 1959-11-24 Litton Ind Of California Anti-ringing limiter
US3250350A (en) * 1964-04-30 1966-05-10 Outboard Marine Corp Single lever control for clutch and motor
US3309938A (en) * 1964-06-16 1967-03-21 Kiekhaefer Corp Single lever remote control for marine propulsion units

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1966077A (en) * 1931-02-17 1934-07-10 Radio Patents Corp Surge absorbing apparatus
US2854660A (en) * 1956-03-29 1958-09-30 Sparks Withington Co Horn circuit
US2914683A (en) * 1956-08-06 1959-11-24 Litton Ind Of California Anti-ringing limiter
US3250350A (en) * 1964-04-30 1966-05-10 Outboard Marine Corp Single lever control for clutch and motor
US3309938A (en) * 1964-06-16 1967-03-21 Kiekhaefer Corp Single lever remote control for marine propulsion units

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4403970A (en) * 1981-07-30 1983-09-13 Outboard Marine Corporation Marine propulsion unit having ignition interruption means to assist transmission shifting
US20050170715A1 (en) * 2003-07-17 2005-08-04 Nhk Teleflex Morse Co., Ltd. Shift operation apparatus for outboard motor, electronic remote control apparatus for medium-sized boat, and engine control apparatus
US7335070B2 (en) * 2003-07-17 2008-02-26 Nhk Teleflex Morse Co., Ltd. Shift operation apparatus for outboard motor, electronic remote control apparatus for medium-sized boat, and engine control apparatus
US7291048B1 (en) 2007-04-13 2007-11-06 Brunswick Corporation Actuator device for a marine propulsion transmission
US7632161B1 (en) 2007-09-05 2009-12-15 Brunswick Corporation Marine transmission actuator
US10118683B1 (en) 2017-08-21 2018-11-06 Brunswick Corporation Outboard motors having flexible connector assembly for shift actuation
US10737752B1 (en) 2017-08-21 2020-08-11 Brunswick Corporation Outboard motors having flexible connector assembly for shift actuation

Also Published As

Publication number Publication date
SE381015B (sv) 1975-11-24
CA1028035A (en) 1978-03-14
FR2235831A1 (US06826419-20041130-M00005.png) 1975-01-31
SE7406969L (US06826419-20041130-M00005.png) 1975-01-07
AU6923174A (US06826419-20041130-M00005.png) 1975-11-27

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