SE422437B - DEVICE WITH CONTROL SYSTEM - Google Patents

Description

7803963-3 2 affected completely manually and mechanically, so that the power character in both cases becomes equal, and thereby a double command can utilizes the servo means as the only torque generating means at one steering position is not used.

The object of the present invention is therefore to achieve a possibility of a double command that is completely mechanical and manually actuable can be easily connected to one control system of the type specified in the introduction.

This object is achieved in that the invention exhibits the features as set out in the following claims.

A control system according to the invention has a compact and small space-consuming structure and can be easily adapted to collaboration with components and accessories of various kinds. It's easy too « maneuverable and reliable and can be manufactured to a ratio show low cost.

In the following, the invention is described in more detail with reference to the accompanying drawing, in which figure 1 shows a perspective view of essential details of the system according to an embodiment of the invention, figure 2 shows a longitudinal section of those shown in figure 1 the details and figure 3 show a section according to III-III in figure 2.

The control system according to the invention comprises two control directives. bodies, for example two in different places in a motorboat placed, not shown knobs. The movements of the knobs are transmitted via two flexible rotatable and torque transmitting shafts a device for converting rotational motion into linear motion This device is shown in Figure 1 and comprises a housing 1, the content is described in more detail below, and which shows connections 2.3 to the flexible shafts (not shown). The connections include in the embodiment shown, non-circular shaft journals are provided to be inserted into the corresponding recess at the end of the respective flexible rotatable shaft, and sleeve nuts for screwing to threads portions at the ends of the non-rotating housing of each shaft.

The part of the device that moves linearly and is used for control is denoted by Ä. It can, for example, be connected to a rudder cult or equivalent, the housing 1 being suitably fixed in the hull of the boat, preferably adjacent to the rudder cult. 3 7803965-3 As best seen in Figures 2 and 3, the housing 1 has one housing 5 inside which three gears 6,7,8 with straight teeth are arranged. The wheel 6 is rotatably mounted on a shaft 9 which is rotatably mounted in the housing and which is rotated by it to the connection 2 disconnected flexible torque transmitting shaft from one of the knobs. Ujulet 7 is arranged in a corresponding manner on a shaft 10 which cooperates with the connection 3 and the other this coupled flexible shaft from the other of the steering wheels.

The shafts 9 and 10 are parallel and the gears 6 and 7 are axially offset relative to each other. The gear 8 is torsionally stable but axially displaceably arranged on a shaft 11, for example by splines. The shaft 11 has at its one end one pin 12, which is covered by a lid 13. The other end of the shaft 11 is rotatably connected to a rotatable screw or nut in a ball screw cylinder, so that upon rotation of the shaft the nut or the screw in the ball screw cylinder is displaced linearly on i and per se known manner. The shaft journal 12 can via a suitable clutch, for example a magnetic or freewheel clutch, connected to, for example, a servomotor or a motor for autopilot steering. In this case, the cover 13 can be replaced with one on in the same way the sonl lid attachable motor or clutch bracket.

The displacement of the gear 8 for its engagement with either of the gears 6 or 7 is done by means of a control arm 1ü, which is connected in part to a drag wire 15, which in turn is connected to a control lever (not shown), and partly one compression spring 16, which pushes the arm lä in the opposite direction of the wire 15 traction direction. The gear 8 is provided with a ring-shaped groove 17 in which the outer ring of one on the arm lü is arranged ball bearing 18 is inserted. At the arm of the arm and thus stored 18 displacement to the left or right (Fig. 2) is thus included gear 8. The outer ring of the bearing l8 rotates during operation due to the friction against the track 17. In it in fig. 2 showed the position with the arm 15 shifted to the right is the wheels 6 ocL 8 connected, while the wheel 7 is disengaged. Then the arm lay is shifted to the left, the track 17 occupies the position which is marked with dotted lines, and thus the wheels are 7 and 8 connected, while the wheel 6 is disengaged. To ensure ____ 78U3963-3 h set that control can always be done with at least one of the wheels, the axial extent of the gear 8 is greater than the mutual axial distance between the wheels 6 and 7, wherein all three wheels 6, 7 and B are connected when the arm lies occupies its middle position.

The invention is not limited to the one described above the embodiment. For example, means other than the ball nut, for example racks, used for conversion of rotational motion to linear motion. Operation of the gear 8 can e.g. happen with hydraulic or electromagnetic means or with tensile and pressure transmitting rod or cable. More than two control directing means can be used in the system, whereby more gears corresponding to wheels 6 and 7 are arranged connectable with the wheel 8. Servomotor or motor for autopilot control can possibly be connected to the control system via gears corresponding to f wheels 6 and 7 instead of via the axle pin 12. However has an arrangement according to the embodiment shown, with the wire 15 and the shafts 9, 10,1l and 12 arranged in the same plane, the advantage that the housing 1 can be made narrow and compact, which gives great freedom when built in cramped spaces.

Claims (1)

5 7903963-5 JATENTKRAV Device in a control system comprising a control-directing means, the movements of which are transmitted via a rotatable and torque-transmitting shaft to a means for converting rotational motion into linear motion, which linear motion is in turn used for control purposes, characterized in that it comprises means (2,3) for connecting at least two control-directing means to said device through respective rotatable and torque-transmitting shafts, and means (lä, l5.l6. 17,18) for optionally disengaging either one or the other shaft from said means for converting rotational motion into linear motion. Device according to claim 1, characterized in that it comprises a number of rotatable wheels (6, 7), each driven by a shaft, which wheels cooperate in a torque-transmitting manner and optionally free-jumpable with a wheel (8) which is rotationally locked arranged on a rotatable part (11), the rotation of which in the device is transformed into a manner known per se! fn linear motion ho> a means cooperating with said detail (Å), Steering wheel according to claim 2, characterized in that the mine always has one of the shafts {o, 7} driven by the shafts {~, 7} dr; n ~ connected to the hole (8) arranged on the rotatable part. Steering system according to claim 2, characterized in that said wheels (6,7,8) are constituted by gears and that the wheel (8) arranged on the rotatable tooth is axially displaceable. For optional cooperation with either of the wheels driven by the axles 56,7), which are arranged with mutual axial distance which is less than the axial extent of the wheel (3) arranged on the rotexable part. J. Control system according to any one of the preceding claims, characterized in that a special motor is disengaged to a coupling core connected to the device for converting rotary motion sensor to iz fi internal motion for driving it. REQUIRED PUBLICATIONS: United Kingdom 13 855/1911