Device for rowing in the direction of view

Abstract

A device for rowing in the direction of view, comprising a frame (5) forming a pivot bearing (11) for a handle lever (3) and for a rowing rod (2) connected to the handle lever (3) via a coupling (12) as a crank of a counter-rotating articulated quadrilateral (4), the rowing rod being rotatably mounted about its axis in a bearing body (9) articulated to the coupling (12) as a rocker arm of the articulated quadrilateral (4) and being connected to a rotary drive (15) with an actuating element (16) at least approximately coaxial to the pivot axis (14), characterized in that the handle lever (3) is rotatably held about its axis in a bearing body (10) designed as a crank of the articulated quadrilateral (4) and actuates an actuating element (21) that is at least approximately coaxial to the pivot axis (13) of the bearing body (10), which is mounted on a rocker arm (22) on the frame (5) to displace the actuating element (16) of the rotary drive. (15) for the oar bar (2).

Description

[0001] The invention relates to a device for rowing in the direction of view with a frame that forms a pivot bearing for a handle lever and for a rowing rod connected to the handle lever via a coupling as a crank of a counter-rotating articulated quadrilateral, which is rotatably mounted about its axis in a bearing body articulated to the coupling as a rocker arm of the articulated quadrilateral and is connected to a rotary drive with an actuating element that is at least approximately coaxial to the pivot axis.

[0002] For rowing while facing forward, a handle lever separate from the oar shaft and oar blade is used. This lever is connected to the oar shaft in a drive connection that allows for reversal of movement, so that during a forward stroke, the handle lever moves the oar blades forward into the extended position. For this purpose, it is known to connect the oar shaft to the handle lever via a coupling in the form of a counter-rotating quadrilateral joint. The linkage between the handle lever and the oar shaft is mounted on a frame that is pivotally mounted about an axis running in the direction of travel. This ensures that the oar blades enter and exit the water when the handle levers are raised from the extended position for the stroke and lowered again at the end of the stroke.In order to be able to turn the rudder blades at the end of a pull and return them to the deployed position near the water's surface and then turn them again for the pull, it is already known (WO 2013 / 126 938 A1) to mount the rudder rod rotatably about its axis in a bearing body forming the rocker arm of the articulating quadrilateral and to connect it to a rotary drive which includes an actuating element guided coaxially to its pivot axis in the bearing body, which is supported on a support forming the pivot axis for the frame and therefore does not follow the pivoting movement of the frame about an axis running in the direction of travel, so that the displacement path of the actuating element relative to the bearing body can be used for the rotary drive of the rudder rod.However, this automatic raising and lowering of the rudder blades, depending on the pivoting movement of the handle levers around an axis running in the direction of travel, does not allow the rower any influence on the position of the rudder blades that is independent of the pivoting position of the frame.

[0003] To enable the rudder blades to be raised and lowered by rotating the handle levers, it is also known (NL 8401906 A) to couple the handle lever to the rudder rod by means of a gimbal joint formed by two hemispherical gear segments at the ends of the handle lever and the rudder rod. This requires that the handle lever and the rudder rod be rotatably mounted about their longitudinal axis on supports which are mounted about a pivot axis passing through the center of the gimbal joint on a frame. This restricts the drive connection allowing reversal of movement between the supports for the handle lever and the rudder rod to a crank mechanism comprising a pushrod driven by the handle lever support as a crank, which is connected to the rudder rod support by a coupling.

[0004] The invention is therefore based on the objective of designing a device for rowing in the direction of view in such a way that the raising and lowering of the oar blades is achieved in a manner familiar to the rower by means of a rotation of the handle levers using simple construction means.

[0005] Starting from a device of the type described above, the invention solves the problem by holding the handle lever rotatably about its axis in a bearing body designed as a crank of the articulated quadrilateral and by actuating an actuator that is at least approximately coaxial to the pivot axis of the bearing body, which acts on a rocker mounted on the frame to displace the actuator of the rotary drive for the rudder rod.

[0006] The rotatable mounting of the handle lever in a bearing body forming the crank of the articulated quadrilateral allows the handle lever to be operated in a manner familiar to a rower from handling the oars of conventional boats. This is because, in addition to the pivoting movement required for the pull and return stroke around a substantially vertical axis, the handle lever can be rotated not only around an axis running in the direction of travel via the frame, but also around its own axis. Therefore, a corresponding transmission of the handle lever's rotational movement around its axis to the rotary drive for the oar shaft is necessary.For this purpose, the rotary motion of the handle lever in its bearing body is transmitted to an actuator that runs at least approximately coaxially with the pivot axis of the bearing body in the frame and actuates a rocker arm mounted on the frame. This rocker arm then uses the actuator derived from the rotation of the handle lever to move the actuator of the rotary drive for the rudder rod, thus rotating the rudder blade up and down in accordance with the rotary motion of the handle lever in its bearing body. The approximately coaxial orientation of the actuators with the pivot axis of their respective bearing bodies in the frame ensures the rotation of the bearing bodies about their pivot axes without compromising the transmission of the actuator's movement to the rotary drive of the rudder rod via the rocker arm.

[0007] The rotary drive for the rudder rod could be designed as a rack and pinion drive with the actuator as a rack. However, more advantageous design conditions arise if the rotary drive for the rudder rod comprises a toggle lever drive located between the bearing body and the rudder rod, the toggle joint of which is connected to the actuator. The transmission of the rotary movement of the handle lever for an actuating movement of the actuator acting on the rocker arm is preferably achieved by a crank formed by the handle lever and connected to the actuator.

[0008] Under simple design conditions, the actuators can be directly attached to the rocker arm on one side and to the knee joint of the rotary drive for the rudder rod or to the crank of the handle lever on the other. However, due to the slight displacements of the actuators relative to the pivot axis of the associated bearing bodies during the actuating movements, the actuators must be connected to the rocker arm or to the knee lever and the crank via spherical joints.

[0009] If precise guidance of the actuators, coaxially aligned to the pivot axis of the bearing bodies, is desired, the actuators acting on the rocker arm with a corresponding play must be designed as pushrods guided coaxially to the pivot axes of the bearing bodies in the bearing bodies, which are connected via a tab to the knee joint of the rotary drive for the rudder rod or to the crank of the handle lever.

[0010] To facilitate raising and lowering the rudder blades by rotating the handle around its axis, the handle can be subjected to a torque by a suitable spring arrangement. Since opposing torques are required when raising and lowering the rudder blades, a spring arrangement can be provided between the handle and the bearing body to apply this torque. In a neutral position of rotation, the line of action of this spring intersects the handle's axis of rotation. Therefore, if the handle is rotated beyond the position where the line of action of the spring intersects the handle's axis of rotation, the direction of the spring torque acting on the handle changes, and the handle is rotated by the spring arrangement into the desired end position for raising or lowering the rudder blade.

[0011] The invention is illustrated in the drawing as an example. It shows Fig. 1 a device according to the invention for rowing in the direction of view partially in the area of ​​the reversing gear between a handle lever and an oar rod in a schematic top view, Fig. 2 a cut along line II-II of the Fig. 1 on a larger scale, Fig. 3 one of the Fig. 2. Corresponding representation of the reversing gear in a view opposite the Fig. 2 different rudder blade positions, Fig. 4 one of the Fig. 2 corresponding representation of a design variant of a reversing gear according to the invention, Fig. 5 one of the Fig. 3. Corresponding representation of the reversing mechanism in the area of ​​the handle lever actuated by a spring arrangement and Fig. 6 one of the Fig. 5. Corresponding illustration of a design variant of the spring arrangement for acting on the handle lever.

[0012] The illustrated device for rowing in the direction of view requires a handle 3 separate from the oar rod 2 which carries a rudder blade 1, and which is connected to the oar rod 2 via a reversing mechanism in the form of a counter-rotating quadrilateral joint 4, as is the case in particular with the Fig. 1 can be removed. This articulated quadrilateral 4 comprises a frame 5 consisting of two frame plates 7, 8 connected to each other by spacers 6, in which bearing bodies 9, 10 are rotatably held in pivot bearings 11. The rudder rod 2 is rotatably held about its axis in the bearing body 9. The handle lever 3 is mounted in the corresponding bearing body 10 in a similar manner. The bearing body 10 thus forms the crank of the articulated quadrilateral 4, which is connected to the bearing body 9 as a rocker arm via a link 12. If the bearing body 10 is pivoted about its pivot axis 13, determined by the pivot bearings 11, via the handle lever 3, the bearing body 9 is pivoted in the opposite direction with the rudder rod 2 about the pivot axis 14 of the bearing body 9.

[0013] To allow the rudder blade 1 to be immersed in and withdrawn from the water, the frame 5 is pivotally mounted about a pivot axis extending in the direction of travel in a manner known per se, although this is not shown for clarity. Thus, when the handle 3 is pivoted upwards, the rudder blades 1 are immersed in the water due to the pivoting of the frame 5. A movement of the handle 3 in the opposite direction raises the rudder blades 1 out of the water.

[0014] The oar blades 1 are positioned according to the following when they enter the water: Fig. 1 to turn up, so that at the end of the passage, when they are turned back approximately parallel to the water surface, as is done in the Fig. 2 is indicated. This raising and lowering of the rudder blades is usually controlled manually by the rower by turning the rudder handle accordingly. In order to achieve analogous control of the rudder blades 1 with a handle lever 3 separate from the rudder bar 2, a rotary drive 15 is provided for the rudder bar 2 in the associated bearing body 9, which is actuated via an actuator 16, according to the Fig. 1 to 3 is designed as a bumper guided coaxially to the pivot axis 14 in the bearing body 9, which, according to the illustrated embodiment, engages via a tab 17 on the knee joint 18 of a toggle lever 19, which is articulated between the bearing body 9 and the rudder rod 2. If the actuator 16 is removed from its guide in the Fig. If the position shown in Figure 2 is shifted in the direction of extension of the knee lever 19, the rudder rod 2 is rotated in its bearing body 9, whereby the rudder blade 1 is displaced from the position shown in the Fig. 2 indicated, rotated position into the working position after the Fig. 3 is turned up.

[0015] To enable the raising and lowering of the rudder blade 1 to be controlled by rotating the handle 3 in its bearing body 10, the handle 3 forms a crank to which a lug 20 engages, which is connected to an actuator 21. This actuator 21, like the actuator 16 for the rotary drive 15, is mounted as a pushrod in the bearing body 10 for the handle 3, slidably coaxially with the pivot axis 13, so that the pushrod can be moved back and forth in its guide by rotating the handle 3 accordingly. To transmit the actuating movement of the actuator 21 to the actuator 16 for the rotary drive 15, a rocker 22 mounted on the frame 5 is provided. The actuators 16 and 21 engage the rocker with a degree of play to compensate for the rotational movement of the rocker 22 about its axis 23 relative to the linear displacement movements of the actuators 16 and 21.Depending on the direction of rotation of the handle lever 3, the rudder rod 2 and, with the rudder rod 2, the rudder blade 1 can be turned up and down.

[0016] Unlike the Fig. Figures 1 to 3 show the embodiment according to the Fig. Four actuators 16, 21 are directly articulated between the rocker 22 and the crank of the handle 3, and between the rocker 22 and the rotary drive 15, respectively. In this case, the actuators 16, 21 deviate from the axial direction of their associated pivot axes 13, 14 during their movement, which must be accommodated by spherical joints 24, 25. However, the basic movement sequence remains unchanged.

[0017] To assist the rotational movement of the oar shaft 2 required for extending and retracting the oar blades 1, the handle lever 3 can be provided with a spring assembly 26, as shown in the Fig. 5 and Fig. Figure 6 shows that these spring arrangements 26 impose a torque on the handle lever 3, moving it into the desired end position each time the line of action of the spring arrangement 26 is shifted from one side of the geometric axis of rotation of the handle lever 3 to the other. In the exemplary embodiment according to the Fig. 5 The spring assembly 26 comprises a tension spring which is articulated between the handle lever 3 and the associated bearing body 10. In the Fig. In the end position shown in Figure 5, the actuating element 21 is held in the stop position by the spring assembly 26. When the handle 3 is rotated from this end position, it must first be turned against the force of the spring assembly 26 until the line of action of the spring assembly 26 intersects the axis of rotation of the handle 3. The spring assembly 26 then acts on the handle 3 in the direction of rotation, thus assisting the turning of the rudder blade 1. The end position of the handle 3 is indicated by the position of the tension spring shown in the dashed line. When the rudder blade 1 is turned, the movement is reversed.

[0018] The spring arrangement 26 according to the Fig. Assembly 6 comprises two tension springs, each articulated between the handle lever 3 and the bearing body 10. Since these two tension springs form a common line of action, the conditions for the spring action of the handle lever 3 are similar to those of the spring arrangement 26 of the Fig. 5. The spring arrangement 26 for the opposite end position of the handle lever 3 is again indicated by a dash-dotted line. Reference symbol list 1 rudder blade 2 oarlocks 3 handle levers 4-jointed quadrilateral 5 frame 6 spacers 7, 8 frame plates 9, 10 bearing bodies 11 Linkage bearings 12 couplings 13, 14 Steering axle 15 Rotary drive 16 Actuator 17 tab 18 Knee joint 19 Knee levers 20 tabs 21 Actuator 22 rocker 23 axle 24, 25 ball joint 26 spring arrangement

Claims

[1] Device for rowing in the direction of view with a frame (5) forming a pivot bearing (11) for a handle lever (3) and for a rudder rod (2) connected to the handle lever (3) via a coupling (12) as a crank of a counter-rotating articulated quadrilateral (4), which is rotatably mounted about its axis in a bearing body (9) articulated to the coupling (12) as a rocker arm of the articulated quadrilateral (4) and is connected to a rotary drive (15) with an actuating element (16) that is at least approximately coaxial to the pivot axis (14), characterized by , that the handle lever (3) is rotatably held about its axis in a bearing body (10) designed as a crank of the articulated quadrilateral (4) and actuates an actuating element (21) which is at least approximately coaxial to the pivot axis (13) of the bearing body (10) and which acts on a rocker arm (22) mounted on the frame (5) to displace the actuating element (16) of the rotary drive (15) for the rudder rod (2). [2] Device according to claim 1, characterized by, that the rotary drive (15) for the rudder rod (2) comprises a toggle lever (19) provided between the bearing body (9) and the rudder rod (2), the toggle joint (18) of which is drive-connected to the actuator (16). [3] Device according to claim 2, characterized by , that the actuator (16) is connected via spherical joints (24, 25) on the one hand to the rocker (22) and on the other hand to the knee joint (18) of the rotary drive (15). [4] Device according to claim 2, characterized by , that the actuating element (16) acting on the rocker (22) is designed as a bumper guided coaxially to the pivot axis (14) of the bearing body (9) in the bearing body (9), which is connected via a tab (17) to the knee joint (18) of the rotary drive (15) for the rudder rod (2). [5] Device according to any one of claims 1 to 4, characterized by , that the handle lever (3) which is rotatably held in its bearing body (10) forms a crank connected to the actuating element (21) for drive. [6] Device according to claim 5, characterized by , that the actuator (21) is connected via spherical joints (24, 25) on the one hand to the rocker (22) and on the other hand to the crank of the handle lever (3). [7] Device according to claim 5, characterized by , that the actuating element (21) acting on the rocker (22) is designed as a bumper guided coaxially to the pivot axis (13) of the bearing body (10) in the bearing body (10), which is connected to the crank of the handle lever (3). [8] Device according to any one of claims 1 to 7, characterized by , that for applying torque to the handle lever (3) a spring arrangement (26) is provided between the handle lever (3) and the bearing body (10), the line of action of which intersects the axis of rotation of the handle lever (3) in a medium rotational position of the handle lever (3).

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