CN112406374A

CN112406374A - Mechanical drawing instrument

Info

Publication number: CN112406374A
Application number: CN202011377641.0A
Authority: CN
Inventors: 马海艳
Original assignee: Nanning University
Current assignee: Nanning University
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-02-26
Anticipated expiration: 2040-11-30
Also published as: CN112406374B

Abstract

The invention discloses a mechanical drawing instrument which comprises a drawing gauge, a height dividing ruler, a moving rod A, a cross rod, a moving rod B, a vertical rod and a length dividing ruler, wherein the upper end of the drawing gauge is fixed in the middle of the length dividing ruler, the lower ends of the height dividing ruler and the vertical rod are vertically connected with the length dividing ruler, the upper ends of the height dividing ruler and the vertical rod are vertically connected with the cross rod, the side surfaces of the height dividing ruler and the vertical rod are provided with a long groove A, the two ends of the moving rod B are arranged in the long groove A, the side edge of the length dividing ruler is provided with a long groove B, and the moving rod A penetrates through the long groove B. The invention can draw the main view of the cylinder along the edges of the moving rod A, the cross rod and the moving rod B, and simultaneously draw the top view by rotating the drawing rod, thereby ensuring the alignment relation of the main view and the top view, and simultaneously drawing the three views of the cylinders with different heights and different diameters.

Description

Mechanical drawing instrument

Technical Field

The invention belongs to the technical field of mechanical drawing tools, and relates to a mechanical drawing instrument.

Background

In the existing teaching tools for mechanical engineering drawings, only rulers, compasses, set squares and the like are used. In mechanical drawing teaching, three views, one of which is cylindrical, are simple examples of beginners as entry points. When three views of a cylinder are drawn on a blackboard or paper, compasses are used for drawing circles, the diameter of the circles is measured, and a main view and a left view are drawn by utilizing an alignment principle. The drawing needs to be well drawn by a set square and compasses only by special attention on alignment, right-angle guarantee and the like. The drawing is troublesome, and misalignment is easy to occur, so that the drawing efficiency is low, and the drawing quality is difficult to ensure.

Disclosure of Invention

In order to solve the technical problem, the invention provides a mechanical drawing instrument.

The invention is realized by the following technical scheme.

The invention provides a mechanical drawing instrument which comprises a drawing gauge, a height graduated scale, a moving rod A, a cross rod, a moving rod B, a vertical rod and a length graduated scale, wherein the upper end of the drawing gauge is fixed in the middle of the length graduated scale, the lower ends of the height graduated scale and the vertical rod are vertically connected with the length graduated scale, the upper ends of the height graduated scale and the vertical rod are vertically connected with the cross rod, the side surfaces of the height graduated scale and the vertical rod are provided with a long groove A, two ends of the moving rod B are arranged in the long groove A, the side edge of the length graduated scale is provided with the long groove B, the moving rod A penetrates through the long groove B, the drawing gauge consists of an end head, support legs, a screw rod, a connecting rod, a nut and a drawing rod, the support legs and the connecting rod are respectively two, the screw rod is fixedly connected to the lower part of the end head, the drawing rod is arranged at the end part of the screw rod, the nut is arranged on the screw rod, and the connecting rod is connected between the nut and the supporting leg.

The nut consists of a shell, a bearing and a sleeve, wherein the lower part of the shell is provided with an internal thread, the bearing is arranged in the shell, the sleeve is arranged in the bearing, and the inner diameter of the sleeve is 4 mm larger than that of the shell provided with the internal thread.

One end of the connecting rod is connected with the supporting leg through a pin shaft, and the other end of the connecting rod is connected with a sleeve arranged in the nut.

The moving rod A is composed of two moving rods which are respectively positioned at two sides of the divider calipers, the appearance of the moving rod A is matched with that of the long groove B, and the shapes of two ends of the moving rod B are matched with that of the long groove A.

The chalk holder is characterized in that the chalk holder is formed by assembling three telescopic rods, scales are arranged on the telescopic rods, and chalk sleeves are arranged at the end parts of the chalk holder.

The invention has the beneficial effects that: the drawing instrument can be directly pressed on a blackboard or paper after being adjusted in size, the main view of the cylinder is drawn along the edges of the moving rod A, the cross rod and the moving rod B, and the top view can be drawn simultaneously by rotating the drawing rods, so that the alignment relation between the main view and the top view is ensured, and meanwhile, the drawing speed is high, and three views of cylinders with different heights and different diameters can be drawn.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic cross-sectional view of a nut.

In the figure: 1-divider calipers, 11-supporting legs, 12-screws, 13-connecting rods, 14-nuts, 141-shells, 142-bearings, 143-sleeves, 15-drawing rods, 2-height scales, 3-moving rods A, 4-cross rods, 5-moving rods B, 6-vertical rods and 7-length scales.

Detailed Description

The technical solution of the present invention is further described below with reference to the accompanying drawings, but the scope of the claimed invention is not limited thereto.

As shown in fig. 1 and 2, a mechanical plotter comprises a divider 1, a height scale 2, a shift rod A3, a cross rod 4, a shift rod B5, a vertical rod 6 and a length scale 7, wherein the upper end of the divider 1 is fixed in the middle of the length scale 7, the lower ends of the height scale 2 and the vertical rod 6 are vertically connected with the length scale 7, the upper ends of the height scale 2 and the vertical rod 6 are vertically connected with the cross rod 4, the side surfaces of the height scale 2 and the vertical rod 6 are provided with a long groove a, two ends of the shift rod B5 are arranged in the long groove a, the side edge of the length scale 7 is provided with a long groove B, the shift rod A3 is arranged in the long groove B, the divider 1 is composed of an end head, a support leg 11, a screw 12, a connecting rod 13, a nut 14 and a drawing rod 15, the support leg 11 and the connecting rod 13 are respectively two, the screw 12 is fixedly connected with the lower part of the end head, the drawing rod 15 is arranged at the end, the upper end of the supporting leg 11 is connected with the two sides of the end head through a pin shaft, the lower end of the supporting leg 11 is connected with a moving rod A3, the nut 14 is arranged on the screw 12, and the connecting rod 13 is connected between the nut 14 and the supporting leg 11.

The nut 14 is composed of a housing 141, a bearing 142 and a sleeve 143, wherein the lower part of the housing 141 is provided with internal threads, the bearing 142 is arranged in the housing 141, the sleeve 143 is arranged in the bearing 142, and the inner diameter of the sleeve 143 is 4 mm larger than the inner diameter of the lower part of the housing 141 provided with the internal threads. When the nut 14 rotates, the connecting rod 13 connected with the sleeve 143 cannot rotate, and the connecting rod 13 can move along with the nut 14, so that the purpose of adjusting the opening or the retraction of the supporting leg 11 is achieved.

One end of the connecting rod 13 is connected with the supporting leg 11 through a pin shaft, and the other end is connected with a sleeve 143 arranged in the nut 14 so as to adjust the opening or the retraction of the supporting leg 11.

The moving rods A are composed of two moving rods A which are respectively positioned at two sides of the divider 1, the shape of the moving rod A3 is matched with that of the long groove B, the shapes of two ends of the moving rod B5 are matched with that of the long groove A, so that the moving rod A3 can move in the long groove B, and the moving rod B5 can move in the long groove A.

The painting rod 15 is formed by assembling three telescopic rods, scales are arranged on the telescopic rods, and chalk sleeves are arranged at the end parts of the painting rod 15. The size of the radius can be adjusted by utilizing the retraction or extension of the telescopic rod, and the chalk sleeve can be used for containing chalk.

During the use with the drawing after adjusting the size, press on the blackboard or on the paper, draw the main view of cylinder along the border that moves pole A3, horizontal pole 4, moves pole B5, rotate the drawing pole simultaneously and can draw the top view simultaneously, guaranteed the main view and the positive relation of top view, draw simultaneously fast, can draw the three views of the cylinder of different height, different diameters.

Claims

1. A mechanical plotter which characterized in that: the drawing gauge comprises a drawing gauge (1), a height graduated scale (2), a moving rod A (3), a cross rod (4), a moving rod B (5), a vertical rod (6) and a length graduated scale (7), wherein the upper end of the drawing gauge (1) is fixed in the middle of the length graduated scale (7), the lower ends of the height graduated scale (2) and the vertical rod (6) are vertically connected with the length graduated scale (7), the upper ends of the height graduated scale (2) and the vertical rod (6) are vertically connected with the cross rod (4), the side surfaces of the height graduated scale (2) and the vertical rod (6) are provided with elongated grooves A, the two ends of the moving rod B (5) are arranged in the elongated grooves A, the side edge of the length graduated scale (7) is provided with elongated grooves B, the moving rod A (3) penetrates through the elongated grooves B, the drawing gauge (1) is composed of an end head, a support leg (11), a screw rod (12), a connecting rod (13), a nut (14) and, landing leg (11) and connecting rod (13) are two respectively, screw rod (12) fixed connection is in the lower part of end, and drawing rod (15) are adorned at the tip of screw rod (12) through the pivot, and landing leg (11) upper end is through round pin hub connection in the end both sides, and the lower extreme of landing leg (11) with move pole A (3) and be connected, nut (14) are adorned on screw rod (12), and connecting rod (13) are connected between nut (14) and landing leg (11).

2. The mechanical plotter of claim 1, characterized in that: the nut (14) consists of a shell (141), a bearing (142) and a sleeve (143), wherein the lower part of the shell (141) is provided with internal threads, the bearing (142) is arranged in the shell (141), the sleeve (143) is arranged in the bearing (142), and the inner diameter of the sleeve (143) is 4 mm larger than the inner diameter of the shell (141) provided with the internal threads.

3. The mechanical plotter of claim 1, characterized in that: one end of the connecting rod (13) is connected with the middle part of the supporting leg (11) through a pin shaft, and the other end of the connecting rod is connected with a sleeve (143) arranged on the nut (14).

4. The mechanical plotter of claim 1, characterized in that: the moving rod A (3) is composed of two moving rods, the two moving rods are respectively positioned on two sides of the divider calipers (1), the appearance of the moving rod A (3) is matched with that of the long groove B, and the shapes of two ends of the moving rod B (5) are matched with that of the long groove A.

5. The mechanical plotter of claim 1, characterized in that: the painting rod (15) is formed by assembling three telescopic rods, scales are arranged on the telescopic rods, and chalk sleeves are arranged at the end parts of the painting rod (15).