Crank connecting rod device capable of generating standard sine wave oscillation

Abstract

The utility model discloses a crank connecting rod device capable of generating standard sine wave oscillation, which comprises a mounting plate, a wing-shaped piece and a turntable are rotatably connected on the mounting plate left and right at intervals, the turntable is provided with a rotating motor, a linkage component is connected between the turntable and the wing-shaped piece, and a turntable sliding block is eccentrically and rotatably connected on the turntable. The linkage assembly comprises a first sliding rail, a third sliding rail and a second sliding rail, the first sliding rail and the third sliding rail extend front and back, the second sliding rail extends left and right, one end of the second sliding rail and the first sliding rail are fixed together, a rotating disc sliding block is eccentrically and rotationally connected to the rotating disc, and the first sliding rail is slidably connected to the rotating disc sliding block; the second sliding rail is provided with a fixed sliding block, the fixed sliding block and the mounting plate are fixed together, and the second sliding rail is connected to the fixed sliding block in a sliding mode; the third sliding rail is fixed to the airfoil-shaped piece, an airfoil-shaped sliding block is connected to the third sliding rail in a sliding mode, and the other end of the second sliding rail is rotationally connected with the airfoil-shaped sliding block. Standard sine wave motion can be generated, and the accuracy of sine wave swing of the airfoil is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sine wave simulation technical field, concretely relates to a crank connecting rod device that can produce standard sine wave oscillation. BACKGROUND

[0002] Many occasions in the wind tunnel need to make the airfoil produce periodic motion, thereby producing the airflow of variable direction. The most common periodic motion is sine wave motion, due to the limitation of motor power and torque size, usually adopting the motor to rotate in the same direction at uniform speed, then through the connecting mode of crank and connecting rod, through the two ends of connecting rod being hinged on the airfoil and crank respectively, the reciprocating motion of airfoil is realized. But due to the inclination of connecting rod in the motion process, the airfoil operation is not a standard sine wave, but a similar sine wave motion as shown in the figure, which cannot meet the condition that the airfoil needs to move according to the standard sine wave, therefore, a crank connecting rod device that can produce standard sine wave oscillation is urgently needed. Figure 4 CONTENT OF THE UTILITY MODEL BACKGROUND

[0003] The utility model aims at solving the technical problem existing in the prior art, and particularly innovatively provides a crank connecting rod device that can produce standard sine wave oscillation, which can produce standard sine wave motion and improve the accuracy of sine wave reciprocating swing of the airfoil.

[0004] In order to realize the above-mentioned purpose, the utility model provides a crank connecting rod device that can produce standard sine wave oscillation, which comprises a mounting plate, the mounting plate is rotatably connected with an airfoil and a rotating disc at left and right intervals, the rotating disc is provided with a rotating motor, a linkage assembly is connected between the rotating disc and the airfoil, the rotating disc is eccentrically rotatably connected with a rotating disc sliding block, the linkage assembly comprises a first sliding rail, a third sliding rail, which are both arranged in front and back extension, and a second sliding rail, which is arranged in left and right extension, the second sliding rail is fixedly connected with the first sliding rail, the rotating disc is eccentrically rotatably connected with a rotating disc sliding block, and the rotating disc sliding block is provided with a first sliding groove for the first sliding rail to be clamped, and the first sliding rail is slidably connected on the rotating disc sliding block through the first sliding groove; the second sliding rail is provided with a fixed sliding block, the fixed sliding block is fixedly connected with the mounting plate through a fixed support, the fixed sliding block is provided with a left and right extending guide sliding groove corresponding to the second sliding rail, and the second sliding rail is slidably connected on the fixed sliding block through the guide sliding groove; the third sliding rail is fixed on the airfoil, and the third sliding rail is slidably connected with an airfoil sliding block, and the end of the second sliding rail is rotatably connected with the airfoil sliding block.

[0005] In the above-mentioned scheme, the rotating disc sliding block, the fixed sliding block and the airfoil sliding block are all ball sliding blocks, which can reduce the friction between the corresponding first sliding rail, the second sliding rail and the third sliding rail, and improve the sliding efficiency.

[0006] In the scheme, the second slide rail is fixed at the middle of the bottom side of the first slide rail, so that the first slide rail and the second slide rail are in T-shaped distribution, compared with L-shaped distribution, more space-saving.

[0007] In the scheme, the first sliding groove is arranged at the bottom of the rotating disc sliding block, and the guide sliding groove is arranged at the top of the fixed sliding block, which are arranged in up-down staggered mode, so that the sliding is smoother and the jamming is avoided.

[0008] In the scheme, the rotating disc is provided with a plurality of rotating disc sliding block mounting holes arranged in intervals from inside to outside, so that the amplitude of the wing type piece swing can be adjusted.

[0009] In conclusion, the rotating disc, the first slide rail, the second slide rail and the third slide rail are simple in structure, stable in cooperation, efficient and not jammed, so that the wing type piece can swing according to the standard sine wave, compared with the traditional crank connecting rod device, the control of the wing type is more accurate, and the device is suitable for the scene of accurately researching the influence of air flow on the measured object under the wing type oscillation. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a top view of the utility model.

[0011] Figure 2 is a perspective view of the utility model.

[0012] Figure 3 is a schematic view of the rotating disc.

[0013] Figure 4 is a wing type movement trajectory of a conventional crank connecting rod mechanism.

[0014] Figure 5 is a wing type movement trajectory of the technical scheme. DETAILED DESCRIPTION

[0015] The utility model will be further described below by combining with the drawings:

[0016] As Figures 1 to 3 and Figure 5As shown, a crank connecting rod device capable of generating a standard sine wave oscillation includes a mounting plate 1, and a wing-shaped piece 2 is rotatably connected to the mounting plate 1 through a vertically arranged rotating shaft. The wing-shaped piece 2 is provided with a rotating disc 3 below the left side of the mounting plate 1, and the rotating disc 3 is provided with a rotating motor 4. The rotating motor 4 is fixed above the mounting plate 1, and the output end of the rotating motor 4 is connected with the center of the rotating disc 3 through the mounting plate 1. The rotating disc 3 is eccentrically connected with a rotating disc slider 6. The rotating disc 3 is provided with a plurality of rotating disc slider mounting holes 3a from inside to outside, which can adjust the installation position of the rotating disc slider 6, so as to adjust the amplitude of the sine wave of the wing-shaped piece 2. A linkage assembly 5 is arranged between the rotating disc 3 and the wing-shaped piece 2. The linkage assembly 5 includes a first sliding rail 5a, a third sliding rail 5c, and a second sliding rail 5b.

[0017] The left end of the second sliding rail 5b is fixed to the middle of the bottom side of the first sliding rail 5a, so that the first sliding rail 5a and the second sliding rail 5b are distributed in a T shape, saving space. The rotating disc 3 is eccentrically connected with the rotating disc slider 6, and the rotating disc slider 6 is provided with a first sliding groove for the first sliding rail 5a to slide into, and the first sliding rail 5a is slidably connected to the rotating disc slider 6 through the first sliding groove. The second sliding rail 5b is provided with a fixed slider 7, and the fixed slider 7 is fixed to the mounting plate 1 through a fixed support. The fixed slider 7 is provided with a left and right extending guide sliding groove corresponding to the second sliding rail 5b, and the second sliding rail 5b is slidably connected to the fixed slider 7 through the guide sliding groove.

[0018] The third sliding rail 5c is fixed to the wing-shaped piece 2, and the wing-shaped piece 2 is slidably connected with a wing-shaped slider 8, and the right end of the second sliding rail 5b is rotatably connected with the wing-shaped slider 8 through a rotating shaft, and the top of the wing-shaped slider 8 is provided with a bearing for connecting the rotating shaft, and the right end of the second sliding rail 5b is rotatably connected with the top of the rotating shaft,

[0019] The rotating disc slider 6, the fixed slider 7 and the wing-shaped slider 8 are all ball sliders, which can reduce the friction between the corresponding first sliding rail 5a, the second sliding rail 5b and the third sliding rail 5c, and improve the sliding efficiency. The first sliding groove is arranged at the bottom of the rotating disc slider 6, and the guide sliding groove is arranged at the top of the fixed slider 7, which are arranged staggeredly, so that the sliding is more smooth and the jamming is avoided.

Claims

1. A crank-connecting rod device capable of generating standard sine wave oscillation, characterized in that: The system includes a mounting plate (1), on which airfoil (2) and turntable (3) are rotatably connected at left and right intervals. The turntable (3) is equipped with a rotating motor (4). A linkage assembly (5) connects the turntable (3) and airfoil (2). A turntable slider (6) is eccentrically rotatably connected to the turntable (3). The linkage assembly (5) includes a first slide rail (5a) and a third slide rail (5c) that extend forward and backward, and a second slide rail (5b) that extends left and right. The second slide rail (5b) is fixedly connected to the first slide rail (5a). The turntable slider (6) is eccentrically rotatably connected to the turntable (3), and the turntable slider (6) is provided with a mechanism for the first slide rail to slide. The first slide rail (5a) is inserted into the first slide groove, and the first slide rail (5a) is slidably connected to the turntable slider (6) through the first slide groove; the second slide rail (5b) is equipped with a fixed slider (7), and the fixed slider (7) is fixed together with the mounting plate (1) through a fixed bracket. The fixed slider (7) is provided with a guide slide groove extending to the left and right corresponding to the second slide rail (5b). The second slide rail (5b) is slidably connected to the fixed slider (7) through the guide slide groove; the third slide rail (5c) is fixed on the airfoil (2), and the airfoil slider (8) is slidably connected to the third slide rail (5c). The end of the second slide rail (5b) is rotatably connected to the airfoil slider (8).

2. The crank-connecting rod device capable of generating standard sine wave oscillation according to claim 1, characterized in that: The turntable slider (6), the fixed slider (7), and the airfoil slider (8) are all ball bearing sliders.

3. The crank-connecting rod device capable of generating standard sine wave oscillation according to claim 1, characterized in that: The second slide rail (5b) is fixed to the middle of the bottom side of the first slide rail (5a), so that the first slide rail (5a) and the second slide rail (5b) are distributed in a T-shape, saving space.

4. A crank-connecting rod device capable of generating standard sine wave oscillation according to claim 3, characterized in that: The first groove is formed at the bottom of the turntable slider (6), and the guide groove is formed at the top of the fixed slider (7).

5. A crank-connecting rod device capable of generating standard sine wave oscillation according to claim 1, characterized in that: The turntable (3) has multiple turntable slider mounting holes (3a) spaced from the inside to the outside.

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