A hanging oar machine steering device

Abstract

The application discloses a propeller machine steering device, which comprises a mounting frame, a control box, a shaft sleeve, a rotating shaft, a transverse sliding rod and an adjusting rod. The shaft sleeve is fixed on the mounting frame, and the rotating shaft penetrates through the shaft sleeve. The lower end of the rotating shaft is used for fixedly connecting a propeller assembly, and the upper end is fixedly connected with the control box. The transverse sliding rod is slidingly installed on the mounting frame. The end of the transverse sliding rod is hingedly connected with one end of the adjusting rod through a vertical first shaft, and the other end of the adjusting rod is hingedly connected with a connecting rod fixed on the control box. The size of the connecting rod and the adjusting rod is determined according to the design size of R and L, so that the same angle of deflection of the propeller assembly can be realized when the transverse sliding rod moves the same distance to the left and to the right from the reference position, thereby ensuring that the control angles of the left and right wheels are relatively symmetrical when steering through the steering wheel, that is, the rudder angle can also remain the same when the left and right wheels rotate the same angle value.

Description

Technical Field

[0001] This invention relates to a steering device for outboard motors, belonging to the technical field of outboard motors. Background Technology

[0002] A marine outboard motor is an integrated unit consisting of a power engine and a propeller assembly, mounted externally at the stern. The propeller assembly extends into the water, and the power engine drives the propeller to rotate, pushing water backwards. The reaction force of the water propels the boat forward. The propeller is simple in construction, lightweight, and highly efficient. Being well-protected below the waterline, it is durable. When turning, the entire unit moves, changing the direction of the propeller's water thrust, thus turning the boat. Currently, marine outboard motors generally employ three steering methods: 1. Electric steering, equipped with a steering motor that controls steering via electrical signals; 2. Mast steering, where the operator rotates the mast at the stern to turn; 3. Mechanical transmission steering, where a steering wheel connects to a transmission rod, which in turn connects to a transverse sliding bar. Figure 1-4 As shown, the outboard motor is mounted on the stern of the boat via a mounting bracket 1. A vertical bushing 3 is fixed on the mounting bracket 1, and a rotating shaft passes through the bushing 3. The lower end of the rotating shaft is fixedly connected to the propeller assembly, and the upper end of the rotating shaft is fixedly connected to the control box 2. A transverse slide bar 5 is slidably mounted on the mounting bracket 1, and the end of the transverse slide bar 5 is hinged to an adjusting rod 6. The adjusting rod 6 includes a lower vertical rod 61, a horizontal rod 62, and an upper vertical rod 63 connected in sequence. The lower end of the lower vertical rod 61 is hinged to the transverse slide bar 5, and the top end of the upper vertical rod 63 is hinged to a connecting rod 10 on the control box 2. The steering wheel drives the transmission rod to move, thereby causing the transverse slide bar 5 to slide laterally. In turn, the adjusting rod 6 drives the control box 2 to rotate, thereby achieving the steering of the propeller assembly. Regarding the aforementioned mechanical transmission steering method, when the transverse slide 5 is in the reference position, i.e., the middle position of the stroke, the propeller assembly does not deflect, and the rudder angle is 0°. When the transverse slide 5 moves to the left, the propeller assembly deflects to the right, and when the transverse slide 5 moves to the right, the propeller assembly deflects to the left. However, the current problem is that when the transverse slide 5 moves to the left and to the right by the same distance, the angles at which the propeller assembly deflects to the right and to the left are inconsistent. Summary of the Invention

[0003] Therefore, the purpose of this invention is to provide a propeller steering device that, by setting the length of the crossbar and the distance from the hinge point of the adjusting rod and connecting rod to the axis of rotation, achieves that when the transverse slide bar moves the same distance to the left and right from the reference position, the propeller assembly deflects at the same angle to the left and right.

[0004] To achieve the above objectives, the present invention provides a propeller steering device, comprising a mounting frame, a control box, a bushing, a rotating shaft, a transverse slide bar, and an adjusting rod; the bushing is fixed to the mounting frame, and the rotating shaft passes through the bushing; the lower end of the rotating shaft is fixedly connected to the propeller assembly, and the upper end is fixedly connected to the control box; the transverse slide bar is slidably mounted on the mounting frame; the end of the transverse slide bar is hinged to one end of the adjusting rod via a vertical first axis, and the other end of the adjusting rod is hinged to a connecting rod fixed to the control box via a vertical second axis; wherein the distance from the axis of the rotating shaft to the transverse slide bar is e, the distance from the axis of the rotating shaft to the axis of the second axis is R, the distance from the axis of the first axis to the axis of the second axis is L, the plane passing through the axis of the rotating shaft and perpendicular to the transverse slide bar is the 0-degree plane, the distance from the axis of the first axis to the 0-degree plane is X, X∈[a, b], and θ is the deflection angle of the propeller assembly. Let the angle between the projection of the line connecting the two ends of the adjusting rod onto the horizontal plane and the horizontal sliding rod be:

[0005]

[0006] θ 左 =θ| x＝b ;θ 右 =θ| x＝a Then θ 左 θ 右 It can be expressed as a function of R and L: θ 左 =f(R,L); θ 右 =g(R,L);

[0007] θ 左 With θ 右 As close as possible, i.e., min|θ 左 +θ 右 |, min|θ 左 +θ 右 | Rewritten as min(θ) 左 +θ 右 ) 2 Simultaneously, when the lateral slide bar moves to the middle position of its stroke, the propeller assembly rotation angle is 0, i.e., θ| x＝(a+b) / 2 =0;

[0008] θ 左 ∈[-α,0];θ 右 ∈[0,α]; where α is the stall angle of attack for a low aspect ratio airfoil;

[0009] By the augmented Lagrange multiplier method, we obtain:

[0010]

[0011] Where a, b, and e are known quantities, x i For the remaining unknowns;

[0012] Solve the above system of equations (1) to obtain the design dimensions of R and L.

[0013] Assume θ 左 θ 右 The initial values ​​are taken as -35° and +35° respectively.

[0014] Depend on:

[0015]

[0016] Determine the initial values ​​of R and L;

[0017] The numerical solution of equation system (1) is obtained by the Newton-Raphson algorithm.

[0018] The adjusting rod includes a lower vertical rod, a horizontal rod, and an upper vertical rod connected in sequence. The lower end of the lower vertical rod is connected to the horizontal sliding rod, and the top end of the upper vertical rod is connected to the connecting rod on the control box. The distance L between the axis of the first shaft and the axis of the second shaft is the length of the horizontal rod.

[0019] Using the above technical solution, in the propeller steering device of the present invention, e is determined by the existing structural dimensions, and the range of X (i.e., the values ​​of a and b) is determined by the selected standard parts. Therefore, e, a, and b are all known values. Then, the design dimensions of R and L can be determined by the equation set (1), and the dimensions of the connecting rod and the adjusting rod can be determined according to the design dimensions of R and L. This enables the propeller assembly to deflect to the left and right at the same angle when the transverse slide bar moves to the left and to the right by the same distance from the reference position. This ensures that when steering by the steering wheel, the control angles of the left and right steering wheels are relatively symmetrical, that is, when the left and right steering wheels rotate by the same angle value, the steering angle can also remain the same. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the steering device for a propeller engine.

[0021] Figure 2 This is a front view of the outboard motor steering mechanism.

[0022] Figure 3 This is a side view of the outboard motor steering mechanism.

[0023] Figure 4 This is a top view of the propeller steering mechanism.

[0024] Figure 5 A schematic diagram illustrating the principle of left-side turning of the propeller steering device.

[0025] Figure 6 A schematic diagram illustrating the principle of right-side turning of the propeller steering device. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1-6 As shown, a propeller steering device of the present invention includes a mounting frame 1, a control box 2, a bushing 3, a rotating shaft 4, a transverse slide rod 5, and an adjusting rod 6. The bushing 3 is fixed to the mounting frame 1, and the rotating shaft 4 passes through the bushing 3. The lower end of the rotating shaft 4 is fixedly connected to the propeller assembly, and the upper end is fixedly connected to the control box 2. The transverse slide rod 5 is slidably mounted in a sliding sleeve 7 on the mounting frame 1. The end of the transverse slide rod 5 is hinged to one end of the adjusting rod 6 via a vertical first shaft 8, and the other end of the adjusting rod 6 is hinged to a connecting rod 10 fixed on the control box 2 via a vertical second shaft 9; wherein the distance from the axis of the rotating shaft 4 to the transverse slide rod 5 is e, the distance from the axis of the rotating shaft 4 to the axis of the second shaft 9 is R, and the distance from the axis of the first shaft 8 to the axis of the second shaft 9 is L. In this embodiment, the adjusting rod 6 includes a lower vertical rod 61, a horizontal rod 62, and an upper vertical rod 63 connected in sequence. The lower end of the lower vertical rod 61 is connected to the horizontal slide bar 5, and the top end of the upper vertical rod 63 is connected to the connecting rod 10 on the control box 2. The distance L between the axis of the first shaft 8 and the axis of the second shaft 9 is the length of the horizontal rod 62. The plane passing through the axis of the rotating shaft and perpendicular to the horizontal slide bar 5 is the 0-degree plane 100. The distance X from the axis of the first shaft 8 to the 0-degree plane 100 is X, where X ∈ [a, b], and θ is the deflection angle of the propeller assembly. Let the angle between the projection of the line connecting the two ends of the adjusting rod 6 onto the horizontal plane and the horizontal sliding rod 5 be:

[0028]

[0029] θ 左 =θ| x＝b ;θ 右 =θ| x＝a Then θ 左 θ 右 It can be expressed as a function of R and L: θ 左 =f(R,L); θ 右 =g(R,L);

[0030] θ 左 With θ 右 As close as possible, i.e., min|θ 左 +θ 右 |, min|θ 左 +θ 右 | Rewritten as min(θ) 左 +θ 右 ) 2 Simultaneously, when the transverse slide bar 5 moves to the middle position of its stroke, the propeller assembly rotation angle is 0, i.e., θ| x＝(a+b) / 2 =0;

[0031] θ 左 ∈[-α,0];θ 右 ∈[0,α]; where α is the stall angle of attack for a low aspect ratio airfoil;

[0032] By the augmented Lagrange multiplier method, we obtain:

[0033]

[0034] Where a, b, and e are known quantities, x i For the remaining unknowns;

[0035] Solve the above system of equations (1) to obtain the design dimensions of R and L.

[0036] Since the stall angle of attack for low aspect ratio airfoils is generally α≤40°, we can assume θ 左 θ 右 The initial values ​​are taken as -35° and +35° respectively.

[0037] Depend on:

[0038]

[0039] Determine the initial values ​​of R and L; where When θ = 35° value, When θ = -35° value;

[0040] The numerical solution of equation system (1) is obtained by the Newton-Raphson algorithm.

[0041] Using the above technical solution, in the propeller steering device of the present invention, e is determined by the existing structural dimensions, and the range of X (i.e., the values ​​of a and b) is determined by the selected standard parts. Therefore, e, a, and b are all known values. Then, the design dimensions of R and L can be determined by the equation set (1), and the dimensions of the connecting rod 10 and the adjusting rod 6 can be determined according to the design dimensions of R and L. This enables the propeller assembly to deflect to the left and right at the same angle when the transverse slide bar 5 moves to the left and to the right by the same distance from the reference position. This ensures that when steering by the steering wheel, the control angles of the left and right steering wheels are relatively symmetrical, that is, when the left and right steering wheels rotate by the same angle value, the steering angle can also remain the same.

[0042] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A steering device for a paddlewheel engine, characterized in that: The system includes a mounting bracket, a control box, a bushing, a rotating shaft, a transverse slide bar, and an adjusting rod. The bushing is fixed to the mounting bracket, and the rotating shaft passes through the bushing. The lower end of the rotating shaft is fixedly connected to the propeller assembly, and the upper end is fixedly connected to the control box. The transverse slide bar is slidably mounted on the mounting bracket. The end of the transverse slide bar is hinged to one end of the adjusting rod via a vertical first axis, and the other end of the adjusting rod is hinged to a connecting rod fixed to the control box via a vertical second axis. The distance from the axis of the rotating shaft to the transverse slide bar is e, the distance from the axis of the rotating shaft to the axis of the second axis is R, the distance from the axis of the first axis to the axis of the second axis is L, the plane passing through the axis of the rotating shaft and perpendicular to the transverse slide bar is the 0-degree plane, the distance from the axis of the first axis to the 0-degree plane is X, X∈[a, b], θ is the angle of deflection of the propeller assembly, and φ is the angle between the projection line of the line connecting the two ends of the adjusting rod on the horizontal plane and the transverse slide bar. Therefore: θ 左 =θ| x=b ;θ 右 =θ| x=a Then θ 左 θ 右 It can be expressed as a function of R and L: θ 左 =f(R,L); θ 右 =g(R,L); θ 左 With θ 右 As close as possible, i.e., min|θ 左 +θ 右 |, min|θ 左 +θ 右 | Rewritten as min(θ) 左 +θ 右 ) 2 Simultaneously, when the lateral slide bar moves to the middle position of its stroke, the propeller assembly rotation angle is 0, i.e., θ| x= (a+b) / 2 =0; θ 左 ∈[-α,0];θ 右 ∈[0,α]; where α is the stall angle of attack for a low aspect ratio airfoil; By the augmented Lagrange multiplier method, we obtain: ∂[(θ 左 +θ 右 ) 2 +λ1×( f(R,L)- θ 左 )+λ 2 ×( g(R,L)- θ 右 )+λ 3 *×(-θ 左 -t1 2 )+λ4×(θ 右 -t2 2 )+λ5×(α+θ 左 -t3 2 )+λ6×(α-θ 右 -t4 2 )+λ7(((a+b) / 2) 2 +(Re) 2 -L 2 )] / ∂x i = 0 ……(1) Where a, b, and e are known quantities, x i For the remaining unknowns; e is determined by the existing structural dimensions, and the values ​​of a and b are determined by the selected standard parts; Solve the above system of equations (1) to obtain the design dimensions of R and L.

2. The propeller steering device as described in claim 1, characterized in that: Assume θ 左 θ 右 The initial values ​​are taken as -35° and +35° respectively. Depend on: Determine the initial values ​​of R and L; where φ 35° φ is the value of φ when θ = 35°. -35 ° is the value of φ when θ = -35°; The numerical solution of equation system (1) is obtained by the Newton-Raphson algorithm.

3. The propeller steering device as described in claim 1 or 2, characterized in that: The adjusting rod includes a lower vertical rod, a horizontal rod, and an upper vertical rod connected in sequence. The lower end of the lower vertical rod is connected to the horizontal sliding rod, and the top end of the upper vertical rod is connected to the connecting rod on the control box. The distance L between the axis of the first shaft and the axis of the second shaft is the length of the horizontal rod.

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