CN215220012U - Three-side orthographic projection teaching aid for points - Google Patents

Abstract

The utility model provides a point three-side orthographic projection teaching aid, which comprises three projection plates which can be mutually perpendicular in pairs and also comprises limit blocks, wherein the limit blocks are arranged on the projection surface of the projection plates in a matrix form, the limit blocks which are transversely and longitudinally distributed form a grid-shaped groove body which is transversely and longitudinally orthogonal, and a coordinate line for positioning points is arranged in the grid-shaped groove body; the telescopic rod can be vertically clamped at the intersection of the latticed groove bodies. The utility model discloses a two liang of vertical distributions of three projection boards are in order to form three-dimensional space coordinate system to confirm through the three-dimensional coordinate of the space point of telescopic link in this three-dimensional coordinate system, then expand to the plane through three projection boards, and record three telescopic link two-dimensional coordinate on projection board separately, through comparing the relation between two-dimensional coordinate and the three-dimensional coordinate, thereby obtain the measurement relation that has between the trilateral orthographic projection of point, with the trilateral orthographic projection law of audio-visual revelation point.

Description

Three-side orthographic projection teaching aid for points

Technical Field

The utility model relates to a teaching aid technical field, concretely relates to a trilateral orthographic projection teaching aid for point.

Background

The learning of the three-view projection of the part is the basis for any engineer to read and understand actual engineering patterns, the three-side orthographic projection of the point is the basis for learning the three-view of the part, and in the three-side orthographic projection teaching of the point, the three-side orthographic projection of the point can be disclosed, so that the three-view projection learning method has a good guiding effect on the later-stage learning of the three-view of the part. For beginners, when three-side orthographic projection of a learning point is carried out, a teacher only draws on a blackboard, and students can hardly know the relation between the three-side orthographic projection of the learning point well. For the above reasons, a teaching aid for point three-sided orthographic projection is provided.

SUMMERY OF THE UTILITY MODEL

The utility model provides a trilateral orthographic projection teaching aid of characteristics such as maneuverability is strong, the space expression power is good, visual degree is high, convenient to carry.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a trilateral orthographic projection teaching aid of point, includes three projection boards that can two liang mutually perpendicular, still includes:

the limiting blocks are arranged on the projection surface of the projection plate in a matrix manner, the limiting blocks which are distributed transversely and longitudinally form a grid-shaped groove body which is orthogonal transversely and longitudinally, and coordinate lines for positioning points are arranged in the grid-shaped groove body;

the telescopic rods can be vertically clamped at the intersection points of the latticed groove bodies; and

converge the ball, three telescopic link is kept away from projection board one end on the projection board and can be converged in this ball that converges.

Preferably, the three projection plates are divided into a V projection plate, a W projection plate and an H projection plate, two adjacent side edges of the V projection plate are provided with a first sleeve, and the side edges of the W projection plate and the H projection plate are provided with a second sleeve matched with the first sleeve; the sleeve I and the sleeve II between the V projection plate and the H projection plate are connected through a rotating shaft rod I, and the sleeve I and the sleeve II between the V projection plate and the W projection plate are connected through a rotating shaft rod II.

Preferably, the end parts of the first rotating shaft rod and the second rotating shaft rod, which are close to each other, are provided with external threads and threaded holes which are matched with each other for use.

Preferably, the telescopic link includes the base that can the block in latticed cell body, hangs down the fixed sleeve and the hollow pin of multistage that the one end can follow the flexible displacement of fixed sleeve inner chamber of establishing on the base, and this hollow pin of multistage is kept away from fixed sleeve one end and is equipped with the solid pin that can follow the hollow pin axial displacement of terminal.

Preferably, the multi-section hollow slender rod comprises a plurality of pipe sections sleeved end to end, and the inner pipe section can axially stretch and displace along the outer pipe section.

Preferably, a clamping plate for enabling the W projection plate and the H projection plate to form an angle of 90 degrees is further arranged between the W projection plate and the H projection plate.

Preferably, the coordinate lines include a transverse scale line and a longitudinal scale line orthogonal to the transverse scale line.

Preferably, the bottom of the base is provided with a clamping block, the limiting block is arranged above the projection plate through the cushion block, and a clamping groove used for accommodating the clamping block is arranged between the limiting block and the projection plate.

Preferably, the converging ball is provided with a blind hole for inserting the solid slender rod.

The utility model also discloses a method for using of the trilateral orthographic projection teaching aid of point, including following step:

s1: firstly, realizing the rotating connection of three projection plates through a first rotating shaft rod and a second rotating shaft rod, and rotating the three projection plates to be vertically distributed in pairs to form a three-dimensional space coordinate system;

s2: respectively placing the three telescopic rods on the three projection plates, finally enabling the three telescopic rods to be converged at one point by utilizing the movement of the base along the latticed groove bodies and the telescopic movement of the telescopic rods, installing a converging ball at the intersection of the three telescopic rods, and recording the three-dimensional coordinates of the ball;

s3: taking the confluence ball, fixing one of the projection plates to be immobile, sequentially unfolding the other two projection plates to finally unfold the three projection plates into a plane, further respectively installing the three balls on the three telescopic rods, and recording two-dimensional coordinates of the confluence ball on the three projection plates respectively;

s4: by comparing the quantity relationship between the three two-dimensional coordinates and the three-dimensional coordinates, the measurement relationship of the three-side orthographic projection of the point is visually displayed.

According to the technical solution provided by the utility model, the utility model discloses following beneficial effect has:

1. the utility model discloses in, through two liang of vertical distributions of three projection boards in order to form three-dimensional space coordinate system to confirm through the three-dimensional coordinate of the space point of telescopic link in this three-dimensional coordinate system, then expand to the plane through three projection boards, and record three telescopic link two-dimensional coordinate on projection board separately, through comparing the relation between two-dimensional coordinate and the three-dimensional coordinate, thereby obtain the measurement relation that has between the trilateral orthographic projection of point, with the trilateral orthographic projection law of audio-visual revelation point.

2. In the utility model, the limiting blocks distributed in a matrix are arranged on the projection plate, and a grid-shaped groove body is formed between the limiting blocks distributed in the transverse direction and the longitudinal direction, so that on one hand, the groove body can be used for setting coordinate lines, thereby being convenient for recording the projection coordinates of points; on the other hand, the grid-shaped groove bodies are favorable for realizing the movement of the telescopic rods along the projection plate, so that the positions of the space points can be freely moved according to teaching requirements.

Drawings

Fig. 1 is a schematic diagram of a three-dimensional space coordinate system formed by three projection plates according to the present invention;

FIG. 2 is a schematic view of the three projection panels of FIG. 1 shown in an expanded configuration;

FIG. 3 is a schematic view of a V projection plate;

FIG. 4 is a schematic view of a W projection plate;

FIG. 5 is a schematic view of the H projection plate;

FIG. 6 is a schematic view of the telescoping rod;

FIG. 7 is a schematic view of a base;

FIG. 8 is a schematic view of a hollow wand;

FIG. 9 is a cross-sectional view of a hollow shaft;

FIG. 10 is a schematic view of a solid pin;

FIG. 11 is a schematic view of a splint;

FIG. 12 is a schematic view of a converging sphere;

FIG. 13 is a schematic view of the connection between the first shaft lever and the second shaft lever;

FIG. 14 is a schematic view of a first hinge lever;

FIG. 15 is a schematic view of a second shaft;

fig. 16 is a partial cross-sectional view of a projection plate.

In the figure: 10. projection board, 11, sleeve one, 12, sleeve two, 13, pivot pole one, 14, pivot pole two, 15, splint, 151, spacing groove, 20, stopper, 21, latticed cell body, 22, draw-in groove, 30, coordinate line, 40, telescopic link, 41, base, 411, fixture block, 42, fixed sleeve, 43, hollow slender rod, 44, solid slender rod, 50, converge the ball, 51, blind hole.

Detailed Description

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

Example (b):

referring to fig. 1-2, a three-sided orthographic projection teaching aid of point includes three projection boards 10 that can two liang of mutually perpendicular, still includes:

the limiting blocks 20 are arranged on the projection surface of the projection plate in a matrix manner, the limiting blocks which are distributed transversely and longitudinally form a grid-shaped groove body 21 which is orthogonal transversely and longitudinally, and coordinate lines 30 for positioning points are arranged in the grid-shaped groove body;

the telescopic rods 40 can be vertically clamped at the intersection points of the latticed groove bodies; and

join ball 50, the telescopic link is kept away from projection board one end and can be crossed in this ball that joins on three projection boards, the utility model discloses three projection boards 10 of accessible form two liang of vertically three-dimensional space coordinate systems, and then make the telescopic link on the three projection board cross in a bit, and note the three-dimensional space coordinate of this point through the coordinate line, then expand into the plane with three projection boards, and note the two-dimensional coordinate of telescopic link on projection face separately respectively, through comparing the measurement relation between the trilateral orthographic projection of deriving the point, thereby can follow directly perceived to the relation between the trilateral orthographic projection of student show point.

Referring to fig. 3-5, as a preferred technical solution of the present invention, three projection plates are divided into a V projection plate, a W projection plate and an H projection plate, wherein a first sleeve 11 is disposed on two adjacent side edges of the V projection plate, and a second sleeve 12 matched with the first sleeve is disposed on the side edges of the W projection plate and the H projection plate; wherein, sleeve one between V projection board and the H projection board passes through pivot pole one 13 with the sleeve two, sleeve one between V projection board and the W projection board passes through pivot pole two 14 with the sleeve two and links to each other, during the use, pivot pole one 13 passes sleeve one and sleeve two uses in realizing that the rotation between V projection board and the H projection board links to each other, pivot pole two 14 passes sleeve one and sleeve two uses in realizing that the rotation of V projection board and W projection board links to each other to realize the structure of this three-dimensional space coordinate system when V, W and H projection board are two liang of vertical distributions.

Referring to fig. 13-15, further, the end portions of the first rotating shaft rod 13 and the second rotating shaft rod 14, which are close to each other, are provided with external threads and threaded holes, which are used in a matched manner, specifically, the external threads may be arranged on the second rotating shaft rod, and the threaded holes are arranged on the first rotating shaft rod, so that the threads at the end portions of the second rotating shaft rod 14 are screwed into the threaded holes of the first rotating shaft rod 13, thereby facilitating the vertical distribution of three projection plates in pairs.

Referring to fig. 6-10, as the preferred technical scheme of the utility model, telescopic link 40 is including the base 41 that can block in latticed cell body, hang down the hollow pin 43 of the multistage that fixed sleeve 42 and one end on the base can follow the flexible displacement of fixed sleeve inner chamber, this hollow pin of multistage is kept away from fixed sleeve one end and is equipped with the solid pin 44 that can follow terminal hollow pin axial displacement, specifically, the hollow pin of multistage includes the pipeline section that a plurality of head and the tail covers were established, and the flexible displacement of outside pipeline section axis can be followed to inboard pipeline section, thereby the flexible removal of usable hollow pin of this multistage, so that the telescopic link on three projection boards assembles in a space point department, so as to confirm three-dimensional coordinate.

Referring to fig. 11, in order to improve the stability of the vertical distribution between the W projection plate and the H projection plate, a clamping plate 15 for 90 ° between the W projection plate and the H projection plate may be provided, and the clamping plate may be L-shaped and provided with a position-limiting groove 151 for 90 ° distribution for placing the W projection plate and the H projection plate.

As the utility model discloses preferred technical scheme, coordinate line 30 includes horizontal scale mark and the vertical scale mark of this horizontal scale mark quadrature, utilizes this horizontal scale mark and vertical scale mark, can take notes the three-dimensional coordinate of counter point in three-dimensional coordinate space system, and can be when three projection panels expand, and the two-dimensional coordinate of counter point takes notes to the measurement relation between the trilateral orthographic projection of a certain point.

Referring to fig. 16, further, the bottom of the base 41 is provided with a fixture block 411, the limiting block 20 is arranged above the projection plate through a cushion block, a clamping groove 22 for accommodating the fixture block is arranged between the limiting block and the projection plate, the bottom of four adjacent limiting blocks can be arranged in the fixture block during use, the base is arranged above the limiting block, so that the telescopic rod is fixed in the grid-shaped groove body 21, and the coordinates of the converging ball on the telescopic rod 40 can be recorded according to the coordinate line.

Furthermore, the utility model discloses a base can be along latticed cell body horizontal, longitudinal movement to can remove the position of telescopic link as required by the teaching.

Referring to fig. 12, as a preferred embodiment of the present invention, the converging ball 50 is provided with a blind hole for inserting the solid thin rod.

The working principle is as follows: the three projection plates 10 are connected in a rotating mode through the first rotating shaft rod 13 and the second rotating shaft rod 14, and the three projection plates are vertically distributed in pairs to form a three-dimensional space coordinate system;

the three telescopic rods 40 are respectively arranged on the three projection plates 10, the three telescopic rods are finally converged at one point by utilizing the movement of the base 41 along the grid-shaped groove body 21 and the telescopic movement of the telescopic rods, the converging ball 50 is arranged at the intersection of the three telescopic rods, and the coordinates (x, y and z) of the ball are recorded, specifically, the intersecting axis of the V projection plate and the H projection plate is taken as an x axis, the intersecting axis of the W projection plate and the V projection plate is taken as a z axis, and the intersecting axis of the W projection plate and the H projection plate is taken as a y axis;

the converging ball 50 is taken off, the V projection plate is fixed to be immobile, the W projection plate and the H projection plate are sequentially unfolded, finally, three projection plates are unfolded to form a plane, the three balls are further respectively installed on the three telescopic rods 40, and coordinates of the converging ball on the V projection plate, the W projection plate and the H projection plate are recorded to be (x, z), (y, z) and (x, y), so that the distance from the projection of a point on the H projection plate to the x axis is intuitively equal to the distance from the projection of the point on the W projection plate to the z axis; the projection of the point on the V projection plate to the x axis is equal to the projection of the point on the w projection plate to the y axis; the distance from the projection of the point on the H projection plate to the y axis is equal to the distance from the projection of the point on the V projection plate to the z axis;

further, the following metric relationship can be obtained between the three orthogonal projections of the point: the projection x coordinates of the points on the V projection plate and the projection z coordinates of the points on the W projection plate are the same, and the projection y coordinates of the points on the H projection plate and the projection y coordinates of the points on the W projection plate are the same, so that the points are simplified into length alignment, height leveling and width equality.

The above-mentioned embodiments are only to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims (9)

1. The utility model provides a trilateral orthographic projection teaching aid of point, includes three projection boards (10) that can two liang of mutually perpendicular, its characterized in that still includes:

the limiting blocks (20) are arranged on the projection surface of the projection plate in a matrix manner, the limiting blocks which are distributed transversely and longitudinally form a grid-shaped groove body (21) which is orthogonal transversely and longitudinally, and coordinate lines (30) for positioning points are arranged in the grid-shaped groove body;

the telescopic rods (40) can be vertically clamped at the intersection points of the latticed groove bodies; and

converge ball (50), three the telescopic link is gone up to the projection board and is kept away from projection board one end and can meet in this ball that converges.

2. The teaching aid of claim 1, wherein the three projection plates are divided into a V projection plate, a W projection plate and an H projection plate, a first sleeve (11) is arranged on two adjacent sides of the V projection plate, and a second sleeve (12) matched with the first sleeve is arranged on the sides of the W projection plate and the H projection plate; the sleeve I and the sleeve II between the V projection plate and the H projection plate are connected through a rotating shaft rod I (13), and the sleeve I and the sleeve II between the V projection plate and the W projection plate are connected through a rotating shaft rod II (14).

3. A teaching aid as claimed in claim 2, wherein the ends of the first (13) and second (14) shafts adjacent to each other are provided with co-operating external and threaded holes.

4. A teaching aid as claimed in claim 3, wherein the telescopic rod (40) comprises a base (41) which can be engaged in the grid-like groove, a fixing sleeve (42) which hangs down on the base, and a multi-section hollow slender rod (43) of which one end can be telescopically displaced along the inner cavity of the fixing sleeve, and a solid slender rod (44) of which one end which is far away from the fixing sleeve can be axially displaced along the hollow slender rod at the tail end is arranged on the end of the multi-section hollow slender rod.

5. A teaching aid as claimed in claim 4, wherein the multi-section hollow pin (43) comprises a plurality of tube sections sleeved end to end, and the inner tube section can be telescopically displaced axially along the outer tube section.

6. A teaching aid as claimed in claim 4, wherein a clamping plate (15) is provided between the W and H projection plates for 90 ° of rotation therebetween.

7. A teaching aid as claimed in claim 6, wherein the coordinate lines (30) comprise transverse scale lines and longitudinal scale lines orthogonal to the transverse scale lines.

8. The teaching aid of claim 4, wherein a clamping block (411) is arranged at the bottom of the base (41), the limiting block (20) is arranged above the projection plate through a cushion block, and a clamping groove (22) for accommodating the clamping block is arranged between the limiting block and the projection plate.

9. A teaching aid as claimed in claim 8, wherein the ball (50) is provided with a blind hole (51) for insertion of a solid pin (44).

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