Device for fastening steering actuator cylinders to outboard marine motors and dual-acting actuator cylinder for outboard marine motors

Abstract

A device for fastening a steering actuator cylinder to an outboard marine motor includes a fastening rod insertable inside the outboard marine motor and having ends each inserted inside a corresponding housing seat obtained in a terminal element, so that the fastening rod has a relative rotation with respect to the terminal elements, which are further fastened to the steering cylinder. The outboard motor is integral with the fastening rod, so that the outboard motor can oscillate around the longitudinal axis of the fastening rod. At least one insulating element is interposed between each end of the fastening rod and the corresponding housing seat, the insulating element is configured to at least partially surround the surface of each end.

Claims

1. A device for fastening an actuator cylinder to an outboard marine motor, comprising: a fastening rod insertable inside the outboard marine motor, the fastening rod having ends each inserted inside a corresponding housing seat defined in one of two terminal elements, such that the fastening rod has a relative rotation with respect to the two terminal elements, the two terminal elements being fastened to the actuator cylinder, wherein the outboard marine motor is integral with the fastening rod, so that the outboard marine motor is enabled to oscillate around a longitudinal axis of the fastening rod; and an insulating element interposed between each end of the fastening rod and the corresponding housing seat, wherein the insulating element is configured to at least partially surround a surface of each end of the fastening rod, and wherein the insulating element is fastened to inner walls of the corresponding housing seat, so as to be integral with the one of two terminal elements and allow the relative rotation of the fastening rod.

2. A device for fastening an actuator cylinder to an outboard marine motor, comprising: a fastening rod insertable inside the outboard marine motor, the fastening rod having ends each inserted inside a corresponding housing seat defined in one of two terminal elements, such that the fastening rod has a relative rotation with respect to the two terminal elements, the two terminal elements being fastened to the actuator cylinder, wherein the outboard marine motor is integral with the fastening rod, so that the outboard marine motor is enabled to oscillate around a longitudinal axis of the fastening rod; and an insulating element interposed between each end of the fastening rod and the corresponding housing seat, wherein the insulating element is configured to at least partially surround a surface of each end of the fastening rod, and wherein two insulating elements are provided for each end, the two insulating elements being spaced apart along the longitudinal axis of the fastening rod, lubricating material being interposed between the two insulating elements.

3. The device according to claim 2, wherein the insulating element comprises a bushing element.

4. The device according to claim 1, wherein the corresponding housing seat is shaped as a through-hole obtained in a thickness of the one of two terminal elements, the insulating element having a length equal to a length of the through-hole.

5. A dual-acting actuator cylinder for an outboard marine motor, comprising: a fastening device according to claim 1, wherein the fastening device is configured to fasten the actuator cylinder to the outboard marine motor.

6. A device for fastening an actuator cylinder to an outboard marine motor, comprising: a fastening rod insertable inside the outboard marine motor, the fastening rod having ends each inserted inside a corresponding housing seat defined in one of two terminal elements, such that the fastening rod has a relative rotation with respect to the two terminal elements, the two terminal elements being fastened to the actuator cylinder, wherein the outboard marine motor is integral with the fastening rod, so that the outboard marine motor is enabled to oscillate around a longitudinal axis of the fastening rod; and an insulating element interposed between each end of the fastening rod and the corresponding housing seat, the insulating element consisting of a plastic material shaped as a bushing, the insulating element being fitted on each end of the fastening rod arranged in the corresponding housing seat.

7. The device according to claim 6, wherein the corresponding housing seat is shaped as a through-hole obtained in a thickness of the one of two terminal elements, the insulating element having a length equal to a length of the through-hole.

8. The device according to claim 6, wherein the plastic material is an inert plastic polymer.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) These and other features and advantages of the present invention will become clearer from the following description of some exemplary embodiments illustrated in the attached drawings in which:

(2) FIG. 1 shows a perspective view of an actuator cylinder known in the art;

(3) FIGS. 2a and 2b also show a fastening device according to the present invention;

(4) FIGS. 3 and 4 show two views of an actuator cylinder according to the present invention.

(5) It should be noted that the fastening devices depicted in the enclosed figures are shown to better understand the advantages and features of the claimed device and cylinder.

(6) These figures, therefore, are presented to illustrative without limiting purposes the inventive concept of the present invention, i.e., that of providing a fastening device of an outboard marine motor at the stern of a vessel, which avoids the blocking of the tilt movement of the motor.

(7) Furthermore, while in the attached figures the insulating element consists of a bushing element, one or more insulating elements per end, provided for example by gaskets or similar elements, can also be provided without altering the scope and breadth of the present invention.

DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION

(8) With particular reference to FIG. 1, a dual-acting actuator cylinder according to the state of the art is shown.

(9) The cylinder shown in FIG. 1 is used in the steering devices of a vessel, in particular for outboard marine motors.

(10) The outboard motors are fastened to the transom of a vessel so as to be mounted rotatably, around a substantially vertical steering axis, through the fastening device object of the present invention, which will be described below.

(11) To achieve the steering effect, the cylinder 1 is slidably mounted on at least one stem 2 coaxial to the cylinder 1.

(12) Furthermore, a return arm 3 is fastened to the motor and integral with the cylinder 1, for the transmission of the movement of the cylinder 1 to the motor and to obtain the consequent steering movement.

(13) In fact, the translation of the cylinder 1 along the stem 2 allows the rotation of the motor around a vertical axis thanks to the presence of the return arm 3 which transmits the movement of the cylinder 1 to the motor.

(14) Furthermore, the stem 2 is connected to a fastening device, object of the present invention, of the cylinder 1 to the motor, in a non-sliding manner and so as to allow the relative rotation of the motor with respect to the transom, according to an axis parallel to the axis of the stem 2, the so-called tilt movement of the motor.

(15) In particular, the cylinder-stem system is inserted at least in part inside a corresponding insertion seat belonging to the outboard motor.

(16) The outboard motor is not shown in the figures to better show the fastening device of the stem-cylinder system to the motor, consisting of a fastening rod 4 which is inserted at least in part inside a special seat of the outboard motor, which is integral with this fastening rod 4, so that the rotation of the fastening rod 4 around the longitudinal axis thereof allows the tilt movement of the outboard motor.

(17) The fastening rod 4 is illustrated in particular in FIGS. 2a and 2b and has two ends 41.

(18) It should be noted that FIGS. 2a and 2b only show one end 41, but the fastening device object of the present invention has a symmetrical construction, whereby the ends 41 are provided in the same way.

(19) In particular, the fastening device object of the present invention has two terminal elements 5, such that each terminal element 5 has a first housing seat 51 for inserting the end 41 of the fastening rod 4.

(20) Furthermore, each terminal element 5 has a second housing seat 52 for inserting a corresponding end of the stem 2.

(21) Both the first 51 and the second 52 housing seats are provided through through-holes obtained in the thickness of each terminal element 5, such that the ends of the stem 2 and the ends 41 of the fastening rod 4 are inserted completely inside the respective housing seats 52 and 51, protruding by a certain portion.

(22) Thereby, the portion of the stem 2 and of the fastening rod 4 protruding with respect to the terminal element 5, can be coupled to clamping nuts, respectively 53 and 54, for locking the stem 2 and the rod 4.

(23) It should be noted that the stem 2 is locked and has no relative movement with respect to the terminal element, neither translation nor rotation, while the fastening rod 4 is locked so that it cannot move with respect to the terminal element 5, while it can rotate with respect to this terminal element.

(24) In particular, there is a bushing element 6 interposed between the end 41 and the inner walls of the housing seat 51 of the terminal element 5.

(25) According to the variant shown in FIGS. 2a and 2b, the bushing element 6 has a length such as to completely cover the part of the end 41 inside the housing seat 51.

(26) Furthermore, the bushing element 6 is made of plastic to electrically insulate the end 41 from the inner walls of the housing seat 51, i.e., to electrically insulate the fastening rod 4 with respect to the terminal element 5.

(27) Advantageously, the bushing element 6 consists of an inert plastic polymer, so as to facilitate the rotation of the fastening rod 4 with respect to the terminal element 5, preventing the surfaces of the end 41 or the inner walls of the housing seat 51 from wearing.

(28) In FIG. 2a, the bushing element 6 is illustrated fitted on the end 41, so as to overlap with the outer surface of the fastening rod 4, however preferably, the bushing element 6 is fitted on the inner walls of the housing seat 51 of the terminal element 5.

(29) According to this configuration, the bushing element 6 is integral with the terminal element 5, so it does not rotate in combination with the fastening rod 6, but it is the end 41 which rotates inside the bushing element 6, which remains fastened.

(30) The fastening element described and shown in FIGS. 2a and 2b can be provided in combination with any actuator cylinder for outboard marine motors, whether a hydraulic, mechanical, electro-hydraulic or electro-mechanical cylinder, without including constructive modifications to the fastening rod 4 or the terminal element 5.

(31) With particular reference to FIG. 1, the cylinder 1 is electrically activated, through control signals generated by an electronic unit comprising an outer casing 7 inside which there is an electronic board 70 (FIGS. 3 and 4) adapted to generate or transmit control signals for the movement of the cylinder 1 depending on the information received through the electric transmission cable 8.

(32) For example, the transmission cable 8 may be connected to a motion detection unit of a vessel control member, such as a steering wheel, which transforms the rotation of the steering wheel into electrical or data signals, transmitted through the cable 8 to the electronic board 70.

(33) The electronic board 70 processes these signals and drives the actuators 71 to move the cylinder 1.

(34) Alternatively, the processing can take place upstream of the electronic board 70, which can deal with the simple transmission of the activation command of the actuators 71, based on the data already processed and received through the cable 8.

(35) FIGS. 3 and 4 show a particular configuration of the connection area between the cable 8 and the electronic board 70.

(36) It should be noted that according to a preferred embodiment variant, all the contents of the outer casing 7 are embedded inside insulating material, such as resins or the like, not shown in the figures for simplicity of display.

(37) With particular reference to FIGS. 3 and 4, the terminal of the cable 8 is welded to the electronic board 70, through the contacts 73: the cable 8 is in fact covered by an insulating sheath 82, which is removed in the terminal part, to allow the wires of conductive material 81 of the cable 8 to be welded to the contacts 73 of the electronic board 70.

(38) As shown in FIGS. 3 and 4, near the terminal of the cable 8, in particular at the interface area between the cable 8 and the outer casing 7, a protective element 83 is provided, made of a rubber sleeve which covers the cable 8, in particular the insulating sheath 82.

(39) This rubber sleeve is fastened to the outer casing 7 through a shape coupling: in fact, the protection element 83 has an H-shaped terminal which couples to the initial part 74 of the outer casing 7, which has surfaces with a profile complementary to the H-shaped terminal, as clearly shown in FIG. 3.

(40) Furthermore, the transmission cable 8 is firmly locked with respect to the outer casing 7, thanks to the presence of a locking element 9 of the terminal of the cable 8.

(41) The locking element 9 has an “omega”-shaped profile, with a central curved part 92 and two flat lateral fins 91.

(42) As clearly shown in FIG. 4, the two lateral fins 91 may be attached either to the electronic board 70, or to the inner walls of the outer casing 7, depending on constructive needs.

(43) Preferably tightening screws 93 are used, screwed into the thickness of the walls of the outer casing 7 or of the electronic board 70.

(44) The central curved portion 92 overlaps the outer sheath 82, so as to identify a locking seat for the terminal of the cable 8.

(45) In particular, the locking element 9 is configured such that the locking seat has a smaller section than the terminal section of the cable 8.

(46) It follows that the locking element 9 crushes the terminal of the cable 8 towards the electronic board 70.

(47) Depending on the dimensions of the locking element 9, not only the outer sheath 82, but also the wires of conductive material 81 of the cable 8 may deform.

(48) In order to increase the locking of the terminal of the cable 8, the central curved portion 92 may have one or more raised teeth, extending in the direction of the insulating sheath 82.

(49) These teeth will have a shape such as to crush the insulating sheath 82, without damaging or penetrating it, so as to keep the insulation of the cable 8 unchanged.

(50) Lastly, it should be noted that the locking element is made of metal material, preferably aluminum, which has a thickness of about 1 mm, so that it can deform if subjected to high pressures, without damaging the electronic board 70 or the interface between the lateral fins 91 and the tightening screws 93.

(51) While the invention is susceptible to various modifications and alternative constructions, some preferred embodiments have been shown in the drawings and described in detail.

(52) It should be understood, however, that there is no intention of limiting the invention to the specific illustrated embodiment but, on the contrary, it aims to cover all the modifications, alternative constructions, and equivalents falling within the scope of the invention as defined in the claims.

(53) The use of “for example”, “etc.”, “or” refers to non-exclusive non-limiting alternatives, unless otherwise stated.

(54) The use of “includes” means “includes but not limited to”, unless otherwise stated.