Mechanical drawing device

Abstract

The utility model relates to the technical field of drawing tools, in particular to a mechanical drawing device. The drawing board comprises a cabinet, the vertical line direction of a drawing platform on the cabinet serves as the main shaft direction, the drawing board capable of rotating around the axis parallel to the main shaft direction is arranged on the drawing platform, a plurality of connecting rods hinged end to end are arranged on the surface of the drawing platform, and the hinged axis of the connecting rods is parallel to the main shaft direction. A paintbrush assembly is installed on the connecting rods, at least two rotating discs which rotate around the axis parallel to the direction of the main shaft are arranged beside the drawing board, each rotating disc is eccentrically connected with the different connecting rods and drives the connecting rods to swing, and the movement track of the paintbrush assembly over the board face of the drawing board can be changed by adjusting the rotating speeds of the different rotating discs. According to the utility model, flower-growing curves with different styles and petal numbers can be conveniently and diversely drawn.

Description

Technical Field

[0001] The utility model relates to the technical field of drawing tools, in particular to a mechanical drawing device. Background Art

[0002] The flower curve ruler, also known as the flower ruler or flower ruler, is a drawing tool for drawing flower curves.

[0003] Since there are many styles and many lines of flower curves, the manual drawing process is relatively long, and mechanical drawing devices for flower curves have also come into being. As recorded in the text of a DIY plotter with Chinese patent publication number CN209022656U, an adjustment disk is used to drive the moving rod to move along a fixed trajectory, thereby driving the brush at the end of the connecting rod to draw a specific pattern along a fixed trajectory. In addition, the turntable is used to drive the drawing paper to rotate, thereby achieving the drawing of flower curves. However, the existing power source that drives the brush to move has a single motion trajectory, resulting in a single style of the drawn flower curve. Even if the turntable speed or the power source movement speed is changed, only the number of petals of the flower curve can be changed. The style of the flower curve also needs to adjust the position of the brush. The operation is relatively cumbersome and the degree of diversity is low, so it needs to be solved urgently. Utility Model Content

[0004] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a mechanical drawing device, which can conveniently and diversely draw flower curves of different styles and numbers of petals.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A mechanical drawing device comprises a cabinet, with the vertical direction of a drawing platform on the cabinet as the main axis direction, a drawing board which can rotate around an axis parallel to the main axis direction is arranged on the drawing platform, a plurality of connecting rods which are hingedly connected head to tail are arranged on the drawing platform table, and the hinge axis of the connecting rod is parallel to the main axis direction, a brush assembly is installed on the connecting rod, and at least two rotating disks which can rotate around an axis parallel to the main axis direction are arranged on the side of the drawing board, each rotating disk is eccentrically connected to a different connecting rod and drives the connecting rod to swing, and adjusting the rotation speed of different rotating disks can change the movement trajectory of the brush assembly just above the drawing board surface.

[0007] As a further solution of the utility model: the connecting rod and the turntable are each provided with two, the two turntables are respectively hingedly connected to the two connecting rods through eccentrically arranged main shaft hinge seats, the brush assembly is fixedly connected to any connecting rod, and the movement trajectory of the brush assembly is located directly above the drawing board surface.

[0008] As a further solution of the utility model: the number of the connecting rods is six, among which four connecting rods are distributed in a W shape, and the other two connecting rods are distributed in a V shape, and the two ends of the two connecting rods in the V shape are hinged to the two ends of the four connecting rods in the W shape, and finally the six connecting rods are hinged head to tail and enclosed to form a closed loop; the number of the turning discs is three, and the turning discs are hingedly connected to the connecting rods through an eccentrically arranged main shaft hinge seat, wherein a turning disc is provided at the hinge point between the two connecting rods in the V shape, and a turning disc is provided at the middle section of the rod body of the two outer connecting rods in the four W shape; the paintbrush assembly is fixed on the rod body of one of the middle connecting rods in the four W shape, and the movement trajectory of the paintbrush assembly is located directly above the drawing board surface.

[0009] As a further solution of the utility model: a shaft is provided in the middle of the back side of the drawing board, and the shaft is coaxially fixedly connected with the output shaft of the servo motor. The back side axis of each turntable is also coaxially fixedly connected with the output shaft of a servo motor.

[0010] As a further solution of the utility model: the cabinet is installed with a controller, and the controller is connected with adjustment knobs matching the number of servo motors, and the speed of each servo motor is adjusted by an adjustment knob.

[0011] As a further solution of the utility model: the cabinet is provided with a plurality of magnetic pressure blocks which can be magnetically adsorbed to the drawing board.

[0012] As a further solution of the utility model: the magnetic pressure block is a magnet, and an iron sheet layer that can be magnetically attracted by the magnet is arranged in the drawing board.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. A rotatable drawing board is provided, and a plurality of connecting rods hingedly connected at the head and tail are provided above the drawing board, and a brush assembly is installed on one of the connecting rods; in addition, at least two turntables are provided on the side of the drawing board to perform rotational motion around an axis parallel to the main axis direction, and each turntable is eccentrically connected to a different connecting rod and drives the connecting rod to perform a swinging motion, so that the swinging motion of the connecting rod is affected by the rotation speed of at least two turntables. Therefore, adjusting the rotation speed of different turntables can change the motion trajectory of the brush assembly just above the drawing board surface, and then combined with changing the rotation speed of the drawing board, it is possible to achieve convenient and diversified drawing of flower curves of different styles and numbers of petals.

[0015] 2. There are two connecting rods and two rotating discs, and the two rotating discs are respectively hingedly connected to the two connecting rods through eccentrically arranged main shaft hinge seats. The brush assembly is fixedly connected to any connecting rod, and the motion trajectory of the brush assembly is located directly above the drawing board. By changing the rotation speed of any rotating disc or changing the rotation speed of the two rotating discs at the same time, the speed difference of the swing of the two connecting rods is changed, and the mutual restraint of the hinged ends of the two connecting rods is used to change the motion paths of the two connecting rods, thereby changing the motion trajectory of the brush assembly. In combination with changing the rotation speed of the drawing board, a variety of flower curves with different styles and numbers of petals can be drawn.

[0016] 3. When there are six connecting rods and three rotating disks, when the rotating disk speed at the hinge point between the two connecting rods in the V-shape changes, or the rotating disk speed at the middle section of the rod body of the two outer connecting rods in the four connecting rods in the W-shape changes, or the rotating disk speeds of the three rotating disks change at the same time, the speed difference between the two connecting rods in the V-shape and the two outer connecting rods in the four connecting rods in the W-shape can be changed; the hinged ends of the two connecting rods in the V-shape and the two outer connecting rods in the four connecting rods in the W-shape are used to restrain each other, and because the rotating disks on the two outer connecting rods in the four connecting rods in the W-shape are located at the middle section of the rod body of the two outer connecting rods, when the two outer connecting rods are restrained by the hinged ends of the two connecting rods in the V-shape, they will perform lever motion through the connection points with the rotating disk on the two outer connecting rods as fulcrums, thereby changing the swing trajectory of the two inner connecting rods in the four connecting rods in the W-shape, thereby changing the motion trajectory of the brush assembly on the two inner connecting rods. In this embodiment, the movement path of the brush assembly can be changed by changing the rotation speed of the three dials. In addition, by changing the rotation speed of the drawing board, the diversity of the flower curves drawn by the drawing device is further improved.

[0017] 4. Use multiple servo motors to drive the drawing board and turntable to rotate separately. The servo motor can not only control the speed, but also has very accurate position accuracy, which is conducive to speed adjustment of a single turntable or the drawing board separately, and facilitates fine adjustment of the style of the flower curve.

[0018] 5. The cabinet is equipped with a controller, and the controller is connected with adjustment knobs matching the number of servo motors, and each servo motor has an adjustment knob to adjust the speed. The controller can not only start the servo motor, but also the adjustment knobs matching the number of servo motors on the controller can be used to control the speed of the servo motors, which is convenient to operate. When the mechanical drawing device is used in the exhibition hall, it is convenient for visitors to operate the mechanical drawing device.

[0019] 6. The cabinet is provided with a plurality of magnetic pressure blocks which can be magnetically adsorbed to the drawing board. Through the magnetic adsorption of the magnetic pressure blocks and the drawing board, the paper can be fixed on the drawing board through the magnetic pressure blocks. By drawing on the paper, a paper version of the drawn flower curve can be directly obtained.

[0020] 7. The magnetic pressure block is a magnet, and an iron sheet layer that can be magnetically adsorbed by the magnet is set inside the drawing board. The drawing board is not set to a magnetic material, which is beneficial to reduce the magnetic field interference to the servo motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of Example 2 of the present utility model.

[0022] Figure 2 It is a schematic diagram of the overall structure of the drawing platform in Example 2 of the utility model.

[0023] Figure 3 This is a schematic diagram of the profile measurement structure of Example 2 of the utility model.

[0024] Figure 4 It is a schematic diagram of the overall structure of the drawing platform in Example 1 of the utility model.

[0025] In the figure: 10, cabinet; 11, drawing platform; 12, adjustment knob; 13, servo motor; 20, drawing board; 30, turntable; 40, magnetic pressure block; 50, brush assembly; 60, connecting rod. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] For ease of understanding, the specific structure and working mode of the utility model are further described below in conjunction with the accompanying drawings:

[0028] The specific structure of the utility model refers to Figure 1-4As shown, its main structure includes a cabinet 10, a rotatable drawing board 20 arranged on the cabinet 10, and a brush assembly 50 driven by a connecting rod 60 and having an adjustable motion path. The drawing board 20 can rotate on the drawing platform 11 around an axis parallel to the main axis direction, with the vertical direction of the drawing platform 11 on the cabinet 10 as the main axis direction. When the brush assembly 50 draws according to a fixed motion path, the drawing board 20 rotates, so that the brush assembly 50 can draw a regular flower curve pattern on the drawing board 20. The connecting rod 60 is arranged on the table top of the drawing platform 11, and the connecting rod 60 is set to be a plurality of connecting rods 60 that are hinged and connected at the head and tail, and the hinge axis of the connecting rod 60 is parallel to the main axis direction, and the brush assembly 50 is installed on the connecting rod 60; at least two turntables 30 that rotate around an axis parallel to the main axis direction are arranged on the side of the drawing board 20, and each turntable 30 is eccentrically connected to a different connecting rod 60 and drives the connecting rod 60 to swing, so that the swing of the connecting rod 60 is affected by the rotation speed of at least two turntables 30. Therefore, adjusting the rotation speed of different turntables 30 can change the movement trajectory of the brush assembly 50 just above the drawing board 20, and then changing the rotation speed of the drawing board 20, so as to realize convenient and diversified drawing of flower curves of different styles and numbers of petals.

[0029] Specifically, the number and distribution of the rotating disk 30 and the connecting rod 60 can be implemented in various ways.

[0030] Embodiment 1, as Figure 4 As shown, the connecting rod 60 and the rotating disk 30 are both provided with two, and the two rotating disks 30 are respectively hingedly connected to the two connecting rods 60 through the eccentrically arranged main shaft hinge seat, and the brush assembly 50 is fixedly connected to any connecting rod 60, and the movement trajectory of the brush assembly 50 is located directly above the surface of the drawing board 20. By changing the rotation speed of any rotating disk 30 or changing the rotation speed of the two rotating disks 30 at the same time, the speed difference of the swing of the two connecting rods 60 is changed, and the mutual restraint of the hinged ends of the two connecting rods 60 is used to change the movement path of the two connecting rods 60, thereby changing the movement trajectory of the brush assembly 50, and then changing the rotation speed of the drawing board 20, a variety of flower curves with different styles and numbers of petals can be drawn.

[0031] Embodiment 2, in order to further enhance the diversity of flower curves drawn by the drawing device, six connecting rods 60 are provided, among which four connecting rods 60 are distributed in a W shape, and the other two connecting rods 60 are distributed in a V shape, and the two ends of the two connecting rods 60 distributed in the V shape are hinged to the two ends of the four connecting rods 60 distributed in the W shape, and finally the six connecting rods 60 are hinged head to tail and enclosed to form a closed loop; three turntables 30 are provided, and the turntables 30 are hingedly connected to the connecting rods 60 through an eccentrically arranged main shaft hinge seat, wherein a turntable 30 is provided at the hinge point between the two connecting rods 60 distributed in the V shape, and a turntable 30 is provided at the middle section of the rod body of the two outer connecting rods 60 of the four connecting rods 60 distributed in the W shape; the brush assembly 50 is fixed on the rod body of one of the middle connecting rods 60 of the four connecting rods 60 distributed in the W shape, and the movement trajectory of the brush assembly 50 is located directly above the board surface of the drawing board 20. The specific principle is that when the rotation speed of the turntable 30 at the hinge point between the two connecting rods 60 of the V-shaped distribution changes, or the rotation speed of the turntable 30 at the middle section of the rod body of the two outer connecting rods 60 of the four connecting rods 60 of the W-shaped distribution changes, or the rotation speeds of the three turntables 30 change simultaneously, the speed difference between the swinging of the two connecting rods 60 of the V-shaped distribution and the two outer connecting rods 60 of the four connecting rods 60 of the W-shaped distribution can be changed; the hinge ends of the two connecting rods 60 of the V-shaped distribution and the two outer connecting rods 60 of the four connecting rods 60 of the W-shaped distribution can be used to adjust the rotation speed of the turntable 30. The two connecting rods 60 are mutually restrained, and because the rotating disk 30 on the two outer connecting rods 60 of the four connecting rods 60 distributed in a W shape is located at the middle section of the rod body of the two outer connecting rods 60, when the two outer connecting rods 60 are restrained by the hinged ends of the two connecting rods 60 distributed in a V shape, they will perform lever movement through the connection points with the rotating disk 30 on the two outer connecting rods 60 as fulcrums, thereby changing the swing trajectory of the two inner connecting rods 60 of the four connecting rods 60 distributed in a W shape, thereby changing the movement trajectory of the brush assembly 50 on the two inner connecting rods 60. In this embodiment, the movement path of the brush assembly 50 can be changed by changing the rotation speed of the three rotating disks 30. In addition, by changing the rotation speed of the drawing board 20, the diversity of the flower curve drawn by the drawing device is further improved.

[0032] Based on all the above embodiments, Figure 3 As shown, a shaft is provided at the middle of the back of the drawing board 20, and the shaft is coaxially fixedly connected to the output shaft of the servo motor 13, and the back axis of each turntable 30 is also coaxially fixedly connected to the output shaft of a servo motor 13. The servo motor 13 can not only control the speed, but also has a very accurate position accuracy, which is conducive to speed adjustment of a single turntable 30 or a drawing board 20 alone, and is convenient for fine adjustment of the style of the flower curve.

[0033] Further, such as Figure 1As shown, the cabinet 10 is installed with a controller, and the controller is connected with adjusting knobs 12 matching the number of servo motors 13, and each servo motor 13 is respectively adjusted in speed by an adjusting knob 12. The controller can not only start the servo motor 13, but also the adjusting knobs 12 matching the number of servo motors 13 on the controller can be respectively used to control the speed of the servo motor 13, which is convenient to operate. When the mechanical drawing device is used in an exhibition hall, it is convenient for visitors to operate the mechanical drawing device.

[0034] In addition, if Figure 1 As shown, the cabinet 10 is provided with a plurality of magnetic pressure blocks 40 which can be magnetically adsorbed to the drawing board 20. Through the magnetic adsorption of the magnetic pressure blocks 40 and the drawing board 20, the paper can be fixed on the drawing board 20 through the magnetic pressure blocks 40, and a paper version of the drawn flower curve can be directly obtained by drawing on the paper.

[0035] Specifically, the magnetic pressure block 40 is a magnet, and an iron sheet layer that can be magnetically attracted by the magnet is provided in the drawing board 20 . The drawing board 20 is not made of a magnetic material, which is beneficial to reducing the magnetic field interference to the servo motor 13 .

[0036] Of course, for those skilled in the art, the present invention is not limited to the details of the exemplary embodiments described above, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0038] The technology, shape and structure parts not described in detail in the present invention are all known technologies.

Claims

1. A mechanical drawing device, characterized in that: The invention comprises a cabinet (10), with the vertical direction of a drawing platform (11) on the cabinet (10) as the main axis direction, a drawing board (20) capable of rotating around an axis parallel to the main axis direction is arranged on the drawing platform (11), a plurality of connecting rods (60) hingedly connected end to end are arranged on the table of the drawing platform (11), and the hinge axis of the connecting rod (60) is parallel to the main axis direction, a brush assembly (50) is installed on the connecting rod (60), and at least two rotating disks (30) capable of rotating around an axis parallel to the main axis direction are arranged on the side of the drawing board (20), each rotating disk (30) is eccentrically connected to a different connecting rod (60) and drives the connecting rod (60) to swing, and the movement trajectory of the brush assembly (50) directly above the drawing board (20) can be changed by adjusting the rotation speed of the different rotating disks (30).

2. A mechanical drawing device according to claim 1, characterized in that: The connecting rod (60) and the rotating disk (30) are both provided in two numbers, and the two rotating disks (30) are respectively hingedly connected to the two connecting rods (60) through eccentrically arranged main shaft hinge seats, the paintbrush assembly (50) is fixedly connected to any connecting rod (60), and the movement track of the paintbrush assembly (50) is located directly above the surface of the drawing board (20).

3. A mechanical drawing device according to claim 1, characterized in that: The number of the connecting rods (60) is six, wherein four connecting rods (60) are arranged in a W shape, and the other two connecting rods (60) are arranged in a V shape, and the two ends of the two connecting rods (60) arranged in the V shape are hinged to the two ends of the four connecting rods (60) arranged in the W shape, and finally the six connecting rods (60) are hinged end to end and enclosed to form a closed loop; the number of the rotating disks (30) is three, and the rotating disks (30) are hingedly connected to the connecting rods (60) through an eccentrically arranged main shaft hinge seat, wherein A rotating disk (30) is provided at the hinge point between the two connecting rods (60) arranged in a V shape, and a rotating disk (30) is provided at the middle section of the shaft of the two outer connecting rods (60) among the four connecting rods (60) arranged in a W shape; the paintbrush assembly (50) is fixed on the shaft of one of the middle connecting rods (60) among the four connecting rods (60) arranged in the W shape, and the movement track of the paintbrush assembly (50) is located directly above the surface of the drawing board (20).

4. A mechanical drawing device according to any one of claims 1 to 3, characterized in that: A shaft is provided in the middle of the back side of the drawing board (20), and the shaft is coaxially fixedly connected to the output shaft of the servo motor (13). The back side axis of each rotating disk (30) is also coaxially fixedly connected to the output shaft of a servo motor (13).

5. A mechanical drawing device according to claim 4, characterized in that: The cabinet (10) is equipped with a controller, and the controller is connected with adjusting knobs (12) matching the number of servo motors (13), and the rotation speed of each servo motor (13) is adjusted by an adjusting knob (12).

6. A mechanical drawing device according to any one of claims 1 to 3, characterized in that: The cabinet (10) is provided with a plurality of magnetic pressure blocks (40) that can be magnetically attracted to the drawing board (20).

7. A mechanical drawing device according to claim 6, characterized in that: The magnetic attraction pressure block (40) is a magnet, and an iron sheet layer that can be magnetically attracted by the magnet is arranged in the drawing board (20).

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