CN111976346A

CN111976346A - Mechanical drawing teaching ruler

Info

Publication number: CN111976346A
Application number: CN202010689407.5A
Authority: CN
Inventors: 陈尔彪; 李孟; 朱巨雷; 江德绪
Original assignee: Yueqing Liushi Vocational And Technical School
Current assignee: Yueqing Liushi Vocational And Technical School
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2020-11-24

Abstract

The invention provides a mechanical drawing teaching ruler, which comprises a central shaft column, a first extension rod, a second extension rod and a drawing rod, wherein the central shaft column is provided with a first extension rod and a second extension rod; the extension directions of the first extension rod and the second extension rod are the same; the first end of the first extension rod is provided with a first upright post vertical to the first extension rod; the second end of the second extension rod is provided with a second upright post vertical to the second extension rod; the drawing rod is provided with a strip-shaped groove, and a first end of the drawing rod is provided with a drawing pen perpendicular to the drawing rod; an elastic pulling piece is arranged in the strip-shaped groove of the drawing rod. The mechanical drawing teaching ruler has a simple structure and unique functions, can draw straight lines, arcs, fan-shaped and circular patterns with different values, and can also measure angles, distances and the like.

Description

Mechanical drawing teaching ruler

Technical Field

The invention relates to the technical field of mechanical equipment, in particular to a mechanical drawing teaching ruler.

Background

The mechanical drawing is an operation that a real object or an imaginary mechanical mechanism is drawn on a plane according to a certain proportion and rules, and is mainly used in the work of mechanical design, engineering design and the like. Drawing ruler tradition among the prior art, the function is single, if draw straight line, curve or measurement angle etc. at the mapping in-process, the drawing ruler still takes place to slide easily, leads to using not convenient enough when drawing, and the drawing precision is lower, can't satisfy teaching personnel's drawing demand.

Disclosure of Invention

The invention provides a mechanical drawing teaching ruler, which comprises a central shaft column (001), a first extension rod (10), a second extension rod (20) and a drawing rod (30); the first end of the second extension rod (20) is connected to the second end of the first extension rod (10); the first end of the second extension rod (20) is provided with a through hole, and the central shaft column (001) penetrates through the through hole so as to be fixedly connected with the second extension rod (20); the extending directions of the first extending rod (10) and the second extending rod (20) are the same; the central shaft column (001) is perpendicular to the second extension rod (20); the first end of the first extension rod (10) is provided with a first upright post (11) vertical to the first extension rod; the second end of the second extension rod (20) is provided with a second upright post (21) perpendicular to the second extension rod; the drawing rod (30) is provided with a strip-shaped groove (32), and a first end of the drawing rod (30) is provided with a drawing pen (31) perpendicular to the drawing rod; elastic pulling pieces (33) are arranged in strip-shaped grooves (32) of the drawing rod (30), one end of each elastic pulling piece (33) is connected with the drawing pen (31), and the other end of each elastic pulling piece is connected with the central shaft column (001).

In a refinement, the drawing pen (31) is fixedly connected to the drawing rod (30) via an intermediate connecting element (34).

In a refinement, the elastic pull (33) is a spring.

In a modified scheme, the teaching ruler further comprises an inverted U-shaped or n-shaped limiting piece (35), and the limiting piece (35) covers the drawing rod (30) in a buckled mode and can slide on the drawing rod (30).

In a modified scheme, the bottom ends of the central shaft column (001), the first upright column (11) and the second upright column (21) are conical.

In a modified scheme, scales for indicating the length are arranged on the second extension rod (20) and the drawing rod (30).

In a refinement, the teaching ruler further comprises a protractor (40), the protractor (40) having an arc-shaped edge and a straight edge; the protractor (40) connects the central shaft column (001) at the midpoint of its straight edge.

In a refinement, the angle gauge (40) has a fan shape, the straight line edge of which is two intersecting straight sides, and the angle gauge (40) connects the central axis column (001) at the intersection of the two straight sides.

In a refinement, the angle gauge (40) is semicircular, the straight edge of which is a straight edge, and the angle gauge (40) connects to the central axis column (001) at the midpoint of the straight edge.

In a refinement, the curved edge of the angle gauge (40) has a scale representing an angle.

The mechanical drawing teaching ruler has a simple structure and unique functions, can draw straight lines, arc-shaped patterns, fan-shaped patterns and circular patterns, and can also measure angles, distances and the like.

Drawings

Fig. 1 is a schematic structural view of a mechanical drawing teaching ruler according to a first embodiment;

FIG. 2 is a side view of the mechanical drawing teaching ruler according to the first embodiment;

fig. 3 is a schematic structural view of the mechanical drawing teaching ruler according to the first embodiment.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present invention have not been shown or described in the specification in order to avoid obscuring the present invention from the excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they can be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" as used herein includes both direct and indirect connections (couplings), unless otherwise specified.

The first embodiment is as follows:

fig. 1 to 3 show a mechanical drawing teaching ruler of this embodiment, which includes a central column 001, a first extension rod 10, a second extension rod 20, and a drawing rod 30.

The first end of the second extension rod 20 is connected to the second end of the first extension rod 10; the first end of the second extension rod 20 is provided with a through hole, and the central shaft column 001 passes through the through hole so as to be fixedly connected with the second extension rod 20; the extension directions of the first extension rod 10 and the second extension rod 20 are the same; the central shaft column 001 is perpendicular to the second extension rod 20.

The first end of the first extension rod 10 is provided with a first upright post 11 vertical to the first extension rod; the second end of the second extension rod 20 has a second upright 21 perpendicular thereto. The bottom ends of the central shaft column 001, the first upright column 11 and the second upright column 21 are tapered, so that the central shaft column can stand on a plane more stably, such as a table top.

The drawing rod 30 has a strip-shaped groove 32, a first end of the drawing rod 30 has a drawing pen 31 perpendicular thereto, and the drawing pen 31 and the drawing rod 30 are fixedly connected by an intermediate connecting member 34. An elastic pulling piece 33 is arranged in the strip-shaped groove 32 of the drawing rod 30, one end of the elastic pulling piece 33 is connected with the drawing pen 31, the other end of the elastic pulling piece 33 is connected with the central shaft column 001, and the elastic pulling piece 33 can be a spring, for example.

The teaching ruler further comprises an inverted U-shaped or n-shaped limiting piece 35, and the limiting piece 35 covers the drawing rod 30 in a buckling mode and can slide on the drawing rod 30.

The second extension rod 20 and the drawing rod 30 are provided with scales for indicating the length.

The teaching ruler of the embodiment further comprises a protractor 40, wherein the protractor 40 is provided with an arc edge and a straight edge; the protractor 40 connects the central shaft post 001 at the midpoint of its straight edge.

In this embodiment, the protractor 40 has a fan shape, the straight edge of the fan shape is two intersecting straight sides, and the protractor 40 is connected to the central axis post 001 at the intersection of the two straight sides. The arc-shaped edge of the protractor 40 has a scale indicating the angle.

In other alternative embodiments of the present invention, the protractor 40 may also be semicircular, with the straight edge being a straight edge, and the protractor 40 being connected to the central shaft post 001 at the midpoint of the straight edge of the strip.

If the user wants to draw a sector with radius r1 and included angle θ, the distance between the central shaft column 001 and the drawing pen 31 needs to be adjusted, and the spring has flexibility, so that when the distance between the central shaft column 001 and the drawing pen 31 is adjusted to r1, the distance between the central shaft column 001 and the drawing pen 31 can be limited to r1 by buckling the limiting piece 35 on the drawing rod 30. Preferably, the two limit pieces 35 are fastened to two sides of the central shaft column 001 respectively, so that a better fixing effect can be achieved. The drawing rod 30 is used for drawing an arc line around the central axis column 001 by taking the central axis column 001 as an axis, and when the drawing rod 30 reaches the scale theta on the protractor 40, the drawing is stopped, so that the fan shape with the radius r1 and the included angle theta can be drawn.

Let r1> r2 show a schematic drawing of a sector with radius r1 and included angle θ, when drawing a sector with radius r2 and included angle θ, the radius is smaller, so as shown in fig. 3, it is only necessary to adjust the distance between the central axis column 001 and the drawing pen 31 to r2 and to limit the position of the central axis column 001 by one or two limiting members 35, and drawing can be started.

The mechanical drawing teaching ruler has a simple structure and unique functions, can draw straight lines, arcs, fan-shaped and circular patterns with different values, and can also measure angles, distances and the like.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.

Claims

1. A mechanical drawing teaching ruler, which is characterized in that,

comprises a central shaft column (001), a first extension rod (10), a second extension rod (20) and a drafting rod (30);

the first end of the second extension rod (20) is connected to the second end of the first extension rod (10); the first end of the second extension rod (20) is provided with a through hole, and the central shaft column (001) penetrates through the through hole so as to be fixedly connected with the second extension rod (20);

the extending directions of the first extending rod (10) and the second extending rod (20) are the same;

the central shaft column (001) is perpendicular to the second extension rod (20);

the first end of the first extension rod (10) is provided with a first upright post (11) vertical to the first extension rod;

the second end of the second extension rod (20) is provided with a second upright post (21) perpendicular to the second extension rod;

the drawing rod (30) is provided with a strip-shaped groove (32), and a first end of the drawing rod (30) is provided with a drawing pen (31) perpendicular to the drawing rod; elastic pulling pieces (33) are arranged in strip-shaped grooves (32) of the drawing rod (30), one end of each elastic pulling piece (33) is connected with the drawing pen (31), and the other end of each elastic pulling piece is connected with the central shaft column (001).

2. The mechanical drawing teaching ruler of claim 1,

the drawing pen (31) is fixedly connected with the drawing rod (30) through an intermediate connecting piece (34).

3. The mechanical drawing teaching ruler of claim 1,

the elastic pulling piece (33) is a spring.

4. The mechanical drawing teaching ruler of claim 1,

the drawing rod is characterized by further comprising an inverted U-shaped or n-shaped limiting piece (35), wherein the limiting piece (35) covers the drawing rod (30) in a buckling mode and can slide on the drawing rod (30).

5. The mechanical drawing teaching ruler of claim 1,

the bottom ends of the central shaft column (001), the first upright column (11) and the second upright column (21) are conical.

6. The mechanical drawing teaching ruler of claim 1,

scales for indicating the length are arranged on the second extension rod (20) and the drafting rod (30).

7. Mechanical drawing teaching ruler according to any of claims 1-6,

further comprising a protractor (40), the protractor (40) having an arcuate edge and a linear edge;

the protractor (40) connects the central shaft column (001) at the midpoint of its straight edge.

8. The mechanical drawing teaching ruler of claim 7,

the protractor (40) is fan-shaped, the straight line edge of the protractor is two crossed straight edges, and the protractor (40) is connected with the central shaft column (001) at the intersection point of the two straight edges.

9. The mechanical drawing teaching ruler of claim 7,

the protractor (40) is semicircular, the straight line edge of the protractor (40) is a straight line, and the protractor (40) is connected with the central shaft column (001) at the midpoint of the straight line.

10. The mechanical drawing teaching ruler of claim 7,

the arc-shaped edge of the protractor (40) is provided with a scale for representing the angle.