Tail rudder control device and kayak

Abstract

The present invention discloses a tail rudder control device and a kayak. The tail rudder control device comprises a tail rudder assembly. The tail rudder assembly comprises a tail rudder, a swing mechanism, a traction mechanism and a guide wheel box. The traction mechanism comprises a steering bracket in transmission connection with the swing mechanism and the tail rudder; a rotating shaft in transmission connection with the tail rudder to convert circumferential rotation of the rotating shaft into longitudinal flipping of the tail rudder; a first transmission wheel disposed around the rotating shaft and in transmission connection with a guide wheel set in the guide wheel box; and a second transmission wheel disposed around the rotating shaft, capable of moving axially along the rotating shaft, and having a first motion state where the second transmission wheel rotates with respect to the first transmission wheel, a second motion state where the second transmission wheel rotates synchronously with the first transmission wheel and the rotating shaft, and a third motion state where the second transmission wheel rotates synchronously with the steering bracket and the rotating shaft. The technical solution provided by the present invention effectively achieves the purpose of retractably installing the tail rudder on the bottom surface of a boat, effectively avoids collision with the bottom of the boat during the taking-up process of the tail rudder and has a simpler and more reliable overall structure.

What is claimed is: 
     
         1 . A tail rudder control device, being applied to a boat and comprises a tail rudder assembly ( 10 ), the tail rudder assembly ( 10 ) comprising a tail rudder ( 1 ), a swing mechanism ( 4 ) for driving the tail rudder ( 1 ) to rotate left and right, a traction mechanism for driving the tail rudder ( 1 ) to flip longitudinally into a bottom of the boat, and a guide wheel box for driving the swing mechanism ( 4 ) and the tail rudder ( 1 ) to return to initial positions, wherein the traction mechanism comprises:
 a steering bracket ( 2 ) in transmission connection with the swing mechanism ( 4 ) and having a lower end hinged to the tail rudder ( 1 );   a rotating shaft ( 3 ) at least partially stretching into the steering bracket ( 2 ) and having a lower end in transmission connection with the tail rudder ( 1 ) to convert circumferential rotation of the rotating shaft ( 3 ) into longitudinal flipping of the tail rudder ( 1 );   a first transmission wheel ( 5 ) disposed around the rotating shaft ( 3 ) and in transmission connection with a guide wheel set ( 7 ) in the guide wheel box, a rotation path ( 51 ) being formed in the first transmission wheel ( 5 ), and a slope being formed on at least part of the rotation path ( 51 ); and   a second transmission wheel ( 6 ) disposed around the rotating shaft ( 3 ), capable of moving axially along the rotating shaft ( 3 ), and at least partially located in the rotation path ( 51 ), such that the second transmission wheel ( 6 ) has a first motion state where the second transmission wheel ( 6 ) rotates with respect to the first transmission wheel ( 5 ) and moves axially along the rotating shaft ( 3 ), a second motion state where the second transmission wheel ( 6 ) rotates synchronously with the first transmission wheel ( 5 ) and the rotating shaft ( 3 ), and a third motion state where the second transmission wheel ( 6 ) rotates synchronously with the steering bracket ( 2 ) and the rotating shaft ( 3 );   and, in the first motion state, the first transmission wheel ( 5 ) drives the guide wheel set ( 7 ) to reset the tail rudder ( 1 ) and the swing mechanism ( 4 ) to the initial positions; in the second motion state, the first transmission wheel ( 5 ) drives the second transmission wheel ( 6 ) and the rotating shaft ( 3 ) to enable the tail rudder ( 1 ) to flip; and in the third motion state, the swing mechanism ( 4 ) drives the steering bracket ( 2 ), the second transmission wheel ( 6 ), the rotating shaft ( 3 ) and the tail rudder ( 1 ) to move to enable to the tail rudder ( 1 ) to rotate left and right.   
     
     
         2 . The tail rudder control device according to  claim 1 , wherein at least one notch ( 21 ) is formed in an upper end of the steering bracket ( 2 ), at least one bump ( 61 ) fitting the notch ( 21 ) in shape is arranged on the second transmission wheel ( 6 ), the number of the bumps ( 61 ) is the same as the number of the notches ( 21 ), and each said bump ( 61 ) is detachably clamped in one said notch ( 21 ) and is allowed to disengage from the notch ( 21 ) when rotating with respect to the notch ( 21 ) in a first direction and enable the second transmission wheel ( 6 ) and the steering bracket ( 2 ) to rotate synchronously when rotating with respect to the notch ( 21 ) in a second direction. 
     
     
         3 . The tail rudder control device according to  claim 2 , wherein a first slope ( 22 ) is formed in one side of the notch ( 21 ), and a second slope ( 62 ) matched with the first slope ( 22 ) is arranged on the bump ( 61 ), such that the bump ( 61 ) is allowed to disengage upwards from the notch ( 21 ) along the first slope ( 22 ). 
     
     
         4 . The tail rudder control device according to  claim 1 , wherein an elastic piece ( 8 ) is arranged in the guide wheel box, and a lower end of the elastic piece ( 8 ) abuts against an upper end surface of the second transmission wheel ( 6 ) and provides a downward elastic force to the second transmission wheel ( 6 ) to enable the second transmission wheel ( 6 ) to move from a position where the second transmission wheel ( 6 ) is in the second motion state to a position where the second transmission wheel ( 6 ) is in the third motion state. 
     
     
         5 . The tail rudder control device according to  claim 1 , wherein a gear ( 31 ) is arranged at a lower end of the rotating shaft ( 3 ), an arc-shaped groove ( 11 ) for receiving the gear ( 31 ) is formed in an upper end of the tail rudder ( 1 ), and two opposite sides of the tail rudder ( 1 ) are hinged to the steering bracket ( 2 ); and an arc-shaped rack structure ( 12 ) meshed with the gear ( 31 ) is arranged on at least one side of the arc-shaped groove ( 11 ) to convert circumferential rotation of the rotating shaft ( 3 ) and the gear ( 31 ) into longitudinal flipping of the tail rudder ( 1 ). 
     
     
         6 . The tail rudder control device according to  claim 3 , wherein a through-hole ( 56 ) allowing the rotating shaft ( 3 ) to penetrate through is formed in a middle of the first transmission wheel ( 5 ), the rotation path ( 51 ) is a groove formed in an inner side wall of the through-hole ( 56 ), a transmission block ( 63 ) located in the groove is arranged on a periphery of the second transmission wheel ( 6 ), the transmission block ( 63 ) rotates from a first end ( 53 ) of the groove to a second end ( 54 ) of the groove in the first motion state, and the second end ( 54 ) is higher than the first end ( 53 ). 
     
     
         7 . The tail rudder control device according to  claim 1 , wherein the swing mechanism ( 4 ) comprises a steering swing arm ( 41 ) disposed outside the steering bracket ( 2 ) and swing arm columns ( 42 ) fixedly connected to lower side surfaces of two ends of the steering swing arm ( 41 ), the guide wheel set ( 7 ) comprises four straightening gears ( 71 ), every two said straightening gears ( 71 ) form a gear set, the two gear sets are arranged on left and right sides of the steering swing arm ( 41 ), the two straightening gears ( 71 ) in each gear set are meshed with each other and in meshed connection with a periphery of the first transmission wheel ( 5 ) by means of a transmission gear ( 72 ), and a lower end surface of each said straightening gear ( 71 ) is provided with a convex surface ( 73 ) abutting against the corresponding swing arm column ( 42 ) in the rotation process and resetting the steering swing arm ( 41 ). 
     
     
         8 . The tail rudder control device according to  claim 6 , wherein the tail rudder control device further comprises a manual control assembly ( 30 ) and two pedal assembles ( 20 ), the manual control assembly ( 30 ) is in transmission connection with the first transmission wheel ( 5 ) through a transmission traction line ( 50 ) to drive the first transmission wheel ( 5 ) to rotate, and each the two pedal assemblies ( 20 ) is in transmission connection with the swing mechanism ( 4 ) through a steering traction line ( 40 ) to drive the swing mechanism ( 4 ) to act. 
     
     
         9 . The tail rudder control device according to  claim 8 , wherein a gap ( 55 ) is formed in the first end ( 53 ) of the groove, and when the transmission block ( 63 ) moves into the gap ( 55 ), the bump ( 61 ) of the second transmission wheel ( 6 ) is clamped in the notch ( 21 ) of the steering bracket ( 2 ). 
     
     
         10 . A kayak, comprising a boat body ( 60 ), wherein the kayak further comprises the tail rudder control device according to any one of  claims 1-9 , the pedal assemblies ( 20 ) and the manual control assembly ( 30 ) of the tail rudder control device are fixedly installed on an inner side wall of the boat body ( 60 ), the tail rudder assembly ( 10 ) of the tail rudder control device is installed at a tail of the boat body ( 60 ), and the tail rudder ( 1 ) of the tail rudder assembly ( 10 ) is able to flip downwards to extend out of a bottom surface of the boat body ( 60 ) and flip upwards to be stored in the ship body ( 60 ).