CN209232257U - A kind of automatic hill climbing experiment teaching aid of cone for demonstrating position of centre of gravity variation - Google Patents

Abstract

The utility model discloses the automatic hill climbing experiment teaching aids of cone that one kind can demonstrate position of centre of gravity variation, including left side brackets, right side bracket, track, bicone.The bracket is made of bottom plate and riser with groove respectively.The track is made of two smooth rigid bars, and both ends are respectively placed in the riser groove of described two brackets, and left end gauge and height are adjustable.The bicone passes through two conical tips along axis rigidity homogeneous thin bar by two identical hollow homogeneous circular cones and one and is connected and fixed, and described two conical surfaces are smooth, and bottom surface is opposite, and there is slight distance in centre, about the thin bar central symmetry.The center of gravity of the bicone is the center along axis thin bar, can identify and measure.The utility model can visually demonstrate the variation of height of C.G. when bicone is climbed automatically and bicone in the influence of the height of C.G. difference to its grade climbing performance at track both ends, be easy to draw materials, production, installation and removal and carrying, be suitble to demonstration and probe into.

Description

A kind of automatic hill climbing experiment teaching aid of cone for demonstrating position of centre of gravity variation

Technical field

The utility model relates to a kind of automatic hill climbing experiment teaching aids of cone.

Background technique

The automatic hill climbing experiment teaching aid of cone in the prior art, the position of centre of gravity of bicone are intuitively to show or survey Amount, on the other hand the principle on the one hand causing student that readily understood bicone is not allowed to climb automatically can not judge bicone not With the grade climbing performance on the track of the gradient and different subtended angles, do not give full play to that the automatic hill climbing experiment teaching aid of cone is due to be probed into Function.

The automatic hill climbing experiment teaching aid of cone in the prior art, the cost is relatively high, and bulky, heavy, once After laboratory apparatus is installed, it is difficult to dismantle, not Portable belt, be not suitable for teacher and flow demonstration.

Summary of the invention

The utility model is mainly solving the technical problems that providing a kind of can visually demonstrate center of gravity when bicone is climbed automatically The experiment teaching aid of height change, and materials are convenient, cost is relatively low, are easily assembled to, dismantle and carry.

In order to solve the above technical problems, the technical solution that the utility model uses is: center of gravity can be demonstrated by providing one kind The automatic hill climbing experiment teaching aid of the cone of change in location, including bracket, track, bicone.

The bracket includes left side brackets and right side bracket, and every side stand is made of bottom plate and riser respectively.The left side The riser setting number of bracket arranges the groove being parallel to each other, and two grooves of a row are arranged on the riser of the right side bracket, all recessed Slot specification is identical.The bottom groove location of the left side brackets riser is slightly above the groove on the right side bracket riser.

The track is made of two smooth rigid bars, and one end is placed in the riser groove of the right side bracket, another End is placed in a certain layer groove of the left side brackets riser.By adjusting two smooth rigid bars in the position of left side brackets It sets, different track grade and subtended angle can be showed.

The bicone passes through two circular cones along axis rigidity homogeneous thin bar by two identical hollow homogeneous circular cones and one Vertex is connected and fixed, and described two conical surfaces are smooth, and bottom surface is opposite, and there is slight distance in centre, about in the thin bar The heart is symmetrical.The center of gravity of the bicone is that can identify along the center of axis thin bar, when it is placed on the track, be can measure Its position of centre of gravity height.

Compared with prior art, the automatic hill climbing experiment teaching aid of cone described in the utility model can visually demonstrate bicone When the variation of its height of C.G. and track are in different gradient and subtended angle when automatic climbing, weight of the bicone at track both ends Influence of the heart difference in height to its grade climbing performance, hill climbing experiment teaching aid more automatic than traditional cone have more intuitive and novelty.Together When, the utility model is drawn materials and is easy to make, and cost is relatively low, and installation and removal are convenient, and teacher, student is suitble to select suitable material Self-control and flowing demonstration.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of a preferred embodiment of the utility model.

Fig. 2 is the top view of embodiment in Fig. 1.

Fig. 3 is the structural schematic diagram of left side brackets 1 in Fig. 1.

Fig. 4 is the structural schematic diagram of right side bracket 2 in Fig. 1.

Specific embodiment

Refering to fig. 1 to Fig. 4, the technical solution of one preferred embodiment of the utility model is described in detail below.

In Fig. 1, a kind of automatic hill climbing experiment teaching aid of cone of measurable position of centre of gravity variation, including left side brackets 1, right side Bracket 2, track 3, bicone 4.The bottom plate 11 of the left side brackets 1 and the bottom plate 21 of right side bracket 2 are separated towards inside On a smooth table top.

In Fig. 2, the track 3 is made of two identical rigid smooth round bars 31 and 32, and the track is close to bracket 1 One end is known as the end A, and one end close to right side bracket 2 is known as the end B.A, the both ends B and the bracket contact position can do coarse processing To prevent track from sliding.

In Fig. 2, the bicone 4 is worn by two identical hollow homogeneous circular cones 41 and one along axis rigidity homogeneous thin bar 42 Described two conical tips to be crossed to be connected and fixed, described two conical surfaces are smooth, and bottom surface is opposite, and there is slight distance in centre, It is symmetrical about the thin bar center 43.The center of gravity of the bicone is the center 43 of the thin bar, uses color identifier.

In Fig. 3, the groove of three-layer parallel is provided on the riser 12 of the left side brackets 1, every layer of groove is same by several The equidistant semi-circular recesses 13 of specification form, and the center line 15 about riser 12 is symmetrical, and pass through 14 phase of transverse groove Even, in order to adjust the gauge at the end the track A.In two edge semi-circular recesses of the every layer of groove of the left side brackets 1 In the heart away from the length along axis thin bar 42 for being slightly less than the bicone 4, the bottom groove distance bottom plate 11 of the left side brackets 1 Height be slightly larger than bicone bottom surface radius, the bicone will not take off at the end track A when guaranteeing track subtended angle maximum It leaves the right or normal track, and bottom will not contact base plate 11.

In Fig. 4, two semi-circular recesses 23 of a row are set on the riser 22 of the right side bracket 2, are connected by transverse groove 24 It connects, identical as 13 specification of groove of the left side brackets riser 12, size is advisable with that can accommodate any smooth round bar. 22 position of groove is slightly below the bottom groove of the bracket 1, tilts track upwards from right to left.

One end of two smooth round bars 31 and 32 is put into two semi-circular recesses of right side bracket 2, the other end can be with Selection is put into 1 any one layer of left side brackets 15 symmetrical two semi-circular recesses of center line about riser 12, to be formed The Symmetry Orbitals of certain slope and subtended angle.By adjusting groove of the smooth round bar 31 and 32 in left side brackets 1 in same layer Position, thus it is possible to vary the gauge at the end track A, to change the subtended angle of track；By adjusting smooth round bar 31 and 32 left side it The groove number of plies on frame 1, thus it is possible to vary the height at the end track A, to change the gradient of track.

By adjusting the end the A gauge and height of the track 3, when can demonstrate errant 3 and being in different subtended angles and the gradient Height of C.G. difference influence to its grade climbing performance of the bicone 4 at track both ends.By being measured with ruler, when the bicone When 4 position of centre of gravitys for being located at the end track B are located at the position of centre of gravity at the end track A higher than it, it may be observed that cone is climbed automatically to A End；When the bicone 4 is located at the position of centre of gravity at the end track B lower than it at the end track A, but it is higher than it between track AB When a certain position, can also be observed that cone climb automatically phenomenon but climbing distance it is shorter；When the bicone 4 is located at the end track B Position of centre of gravity when being lower than its any position between track AB, it is impossible to there is automatic climbing phenomenon.

In conclusion the cone automatic hill climbing experiment teaching aid described in the utility model for demonstrating position of centre of gravity variation, it can With when visually demonstrating that the variation of height of C.G. and track are in different gradient and subtended angle when bicone is climbed automatically, bicone Influence of the height of C.G. difference to its grade climbing performance at track both ends.The utility model is drawn materials and is easy to make, and cost is relatively low, easily In installation, disassembly and carrying, teacher's demonstration and student is suitble to probe into and be used.

The foregoing is merely one embodiment of the utility model, and therefore it does not limit the scope of the patent of the utility model, All approximate, deformations or simple change done with the utility model specification and Detailed description of the invention, belong to the utility model In scope of patent protection.

Claims (3)

1. one kind can demonstrate the automatic hill climbing experiment teaching aid of cone of position of centre of gravity variation, including left side brackets, right side bracket, rail Road, bicone, which is characterized in that the bracket is made of bottom plate and riser respectively, and the riser of the left side brackets is respectively set There is number to arrange the groove being parallel to each other, two grooves of a row are set on the riser of the right side bracket.

2. the cone automatic hill climbing experiment teaching aid according to claim 1 for demonstrating position of centre of gravity variation, which is characterized in that The track is made of two smooth rigid bars, and both ends are respectively placed in the riser groove of described two brackets, left end rail Away from and height it is adjustable, different track grade and subtended angle is presented.

3. the cone automatic hill climbing experiment teaching aid according to claim 1 for demonstrating position of centre of gravity variation, which is characterized in that The bicone passes through two conical tip connections along axis rigidity homogeneous thin bar by two identical hollow homogeneous circular cones and one Fixation forms, and described two conical surfaces are smooth, and bottom surface is opposite, and there is a slight distance in centre, and about the thin bar central symmetry, The center of gravity of the bicone is the center of the thin bar, can identify, can measure its position height.