CN219721895U - Bamboo dragonfly presentation device - Google Patents

Abstract

The utility model belongs to the technical field of scientific education and exhibition, and particularly relates to a dragonfly demonstration device. The utility model comprises a wing panel component with a vertically arranged axis and a meshing component positioned below the wing panel component, wherein the meshing component is driven by a driving component so as to drive a blade at the wing panel component to rotate and lift, and the utility model is characterized in that: the driving assembly comprises an axle which is rotationally matched with the frame, the output end of the axle is coaxially and fixedly connected with the input shaft of the commutator, and the output shaft of the commutator is coaxially matched with the input port of the speed increaser; the output port of the speed increaser is coaxially fixed with the occluding component, so that the occluding component is driven to rotate. The utility model can obviously reduce the operation damping sense of the participators, and enable the blades to quickly reach the initial speed required by the lift action, thereby improving the operation experience sense and the participation sense, and being particularly suitable for children with smaller hand strength.

Description

Bamboo dragonfly presentation device

Technical Field

The utility model belongs to the technical field of scientific education and exhibition, and particularly relates to a dragonfly demonstration device.

Background

When the helicopter flies, the blades of the rotor form a large cone with a certain taper and upward bottom surface, and the large cone is called a rotor cone. The pulling force of the rotor wing is vertical to the bottom surface of the rotor wing cone; when the upward tension is greater than the dead weight of the helicopter, the helicopter ascends; the helicopter descends when the dead weight of the helicopter is smaller than the dead weight of the helicopter; just equal, the helicopter hovers.

The action mode of the bamboo dragonfly in daily life is similar to the action mode, the bamboo dragonfly is generally provided with a straight rod, a pair of blades are arranged at the tail end of the straight rod, and after a user rotates the straight rod by two hands, the bamboo dragonfly can fly for a certain distance automatically. Later, patent publication No. CN106512433A discloses an improved bamboo dragonfly, namely, a spiral flying disc, a central shaft, a handle and a driving device arranged in the handle; the central connector of the spiral flying disc is sleeved on the upper part of the central shaft, and the central connector and the central shaft are in movable fit and adopt opposite-plug connection transmission; the lower end face of the central connector is fixed with an annular iron sheet, an annular permanent magnet is fixed on a central shaft of the position of the annular iron sheet, and the spiral flying disc is supported on the annular permanent magnet; the driving device consists of a rocker mechanism, a gear rack mechanism, a ratchet mechanism, a gear speed increasing mechanism and a gear turning mechanism. When the device works, the rocker mechanism is used for driving the ratchet mechanism, the gear speed increasing mechanism is driven to act, and then the driving force is changed to the rear through the gear direction changing mechanism, so that the spiral flying disc, namely the wing panel, is driven to generate lift motion.

The bamboo dragonfly with the speed increasing and the direction changing is a common design scheme for demonstrating or using the current bamboo dragonfly as a toy, but the following problems exist: the traditional speed increasing mechanisms all rely on gear engagement and then convert the high-speed low torque of an input shaft into the low-speed high torque of an output shaft; the speed increasing mechanism of the current bamboo dragonfly is close to the operation end, so that the operation damping sense of a participant is very strong due to the speed increasing effect, the operation damping sense is visually represented as being more laborious, and the blade can reach the initial speed required by the lift action, so that the bamboo dragonfly is very unfriendly especially for children with smaller hand strength, and the operation experience sense and the participation sense are seriously reduced. Therefore, a solution is needed.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, and provides the bamboo dragonfly demonstration device which can remarkably reduce the operation damping sense of participants and enable the blades to rapidly reach the initial speed required by the lift action, thereby improving the operation experience sense and the participation sense, and being particularly suitable for children with smaller hand strength.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a bamboo dragonfly presentation device, includes the wing piece subassembly that the axis plumbed to be arranged and lies in the interlock subassembly of wing piece subassembly below, thereby the interlock subassembly passes through the drive assembly drive and drives wing piece subassembly department blade and produce gyration and lift action, its characterized in that: the driving assembly comprises an axle which is rotationally matched with the frame, the output end of the axle is coaxially and fixedly connected with the input shaft of the commutator, and the output shaft of the commutator is coaxially matched with the input port of the speed increaser; the output port of the speed increaser is coaxially fixed with the occluding component, so that the occluding component is driven to rotate.

Preferably, the device further comprises a guide rod, wherein the axis of the guide rod is vertically arranged and used for guiding the advancing direction of the fin component, the top end of the guide rod is fixed at the positioning plate, the bottom end of the guide rod extends downwards and penetrates into the sleeve cavity of the positioning sleeve rod, and the bottom end of the guide rod and the positioning sleeve rod form rotary fit; the bottom end of the positioning sleeve rod is fixedly connected with an output port of the speed increaser; the blade of the fin component is sleeved at the guide rod, and the bottom end of the fin component and the top end of the positioning sleeve rod form gear engagement or magnetic force engagement.

Preferably, the positioning sleeve rod comprises a shaft body and a cylinder mouth with an upward opening coaxially arranged at the top end of the shaft body, a mounting hole is vertically penetrated through the working table surface of the machine frame, and the shaft body coaxially penetrates through the mounting hole and is matched with the outer wall of the speed increaser through a bearing; a first wear-resistant bushing is clamped between the cylinder cavity wall of the cylinder opening and the outer wall of the guide rod.

Preferably, the engaging component comprises lower engaging teeth and upper engaging teeth matched with the tooth shape of the lower engaging teeth, the shape of the lower engaging teeth is single tooth shape protruding upwards along the axis of the positioning sleeve rod, the tooth shape of the lower engaging teeth is inclined tooth shape inclined towards the rotation direction of the blade, the bottom ends of the lower engaging teeth extend downwards, and the lower engaging teeth are fixed between the first wear-resistant lining and the cylinder cavity wall of the cylinder opening through fastening screws; the upper biting teeth are secured at the bottom end of the airfoil assembly.

Preferably, the fin assembly comprises an outer sleeve coaxially sleeved outside the guide rod, the top end of the outer sleeve is used for fixing the blades through an upper locating ring, and the bottom end of the outer sleeve is used for fixing the lower engaging teeth through a lower locating ring.

Preferably, the inner annular surfaces of the upper positioning ring and the lower positioning ring are respectively provided with a second wear-resistant bushing.

Preferably, the device further comprises an opaque inner cover for shielding the mounting hole.

Preferably, the top ends of the guide rods are connected with the positioning plates through range extending installation frames.

Preferably, the device further comprises a transparent outer cover body made of acrylic material, the outer shape of the outer cover body is in a straight cylinder shape coaxial with the axis of the guide rod, and the bottom of the outer cover body is fixed on the workbench surface of the machine frame.

Preferably, the wheel axle horizontally penetrates through two bearing seats at the bottom of the workbench surface at the machine frame, so that a rotary structure is formed, and a hand wheel convenient to operate is arranged at the input end of the wheel axle.

The utility model has the beneficial effects that:

1) The structure is felt by large damping brought by the traditional structure of 'steering before steering', and the reverse design thought of 'steering before steering' is adopted instead, so that the aim of keeping away from an operation end is fulfilled by arranging the gear speed increasing mechanism behind, the force required for driving the wheel shaft to rotate can be effectively reduced, the operation handfeel is improved, and the operation is more labor-saving. Therefore, the utility model can obviously reduce the operation damping sense of the participators, and enable the blades to quickly reach the initial speed required by the lift action, thereby improving the operation experience sense and the participation sense, and is particularly suitable for children with smaller hand strength.

2) As a further preferred version of the above, the present utility model is directed more to repeatability of operation and accuracy of action for demonstration purposes. Therefore, on one hand, the utility model relies on the guide rod, thereby realizing the accurate positioning effect on the action direction of the fin component; on the other hand, by means of gear engagement or magnetic force fit, when the blade is in later-stage force loss and descends, the positioning sleeve rod can be naturally matched again, so that basic assurance is provided for the next re-driving rotation and lift generation action.

3) The presence of the positioning loop bar serves the function of a good transition drive assembly, a snap-in assembly and a guide bar. On one hand, the bottom end of the positioning sleeve rod is a shaft body, so that the positioning sleeve rod can be naturally matched with a speed increaser; the top end of the positioning sleeve rod is a cylinder body, so that the bottom end of the guide rod is oriented, and the guide rod cannot be interfered to normally install and work due to the rotation of the positioning sleeve rod. On the other hand, the positioning sleeve rod also forms a matching part of the lower meshing teeth, thereby playing a role in matching with the upper meshing teeth, and the whole structure is compact and reasonable, so that multiple purposes are achieved.

4) The utility model preferably adopts a gear meshing mode to realize the driving effect of the blade; of course, in actual operation, the driving function can be realized by adopting a magnetic adsorption mode. When the gears are meshed, the purpose of rigidly driving the upper meshing teeth and even the wing plate component to work can be achieved by means of the inclined tooth shape of the lower meshing teeth, and the action is very accurate and reliable.

5) The wing plate component is a growing structure in fact and is used for lifting the blade, so that participants can observe the initial position of the blade quickly, and the participation of the whole process is improved; meanwhile, the outer sleeve serving as the extension tube also enables the occluding component to be deeply buried in the inner cover body, so that the simplicity of the appearance of the device is ensured. In addition, the longer outer sleeve also makes the cooperation area of fin subassembly and guide bar longer, and the action of blade is also more stable, and the effect is showing.

6) The use of the first wear-resistant lining and the second wear-resistant lining not only plays a wear-resistant effect, but also can play a role in reducing friction force of a contact area by finely machining the inner wall of the corresponding wear-resistant lining.

7) The transparent acrylic outer cover body has the function of safety protection. For the wheel shaft, the wheel shaft is driven by a hand wheel and is of a horizontal structure; of course, in practical design, the axle is of an axis inclined structure, and can be used, only the purchased type of the commutator is needed to be noted, and the description is omitted here.

Drawings

FIG. 1 is a cross-sectional view of the present utility model;

FIG. 2 is an enlarged partial view of section I of FIG. 1;

FIG. 3 is a mating state diagram of the guide rod, vane assembly and positioning sleeve rod;

FIG. 4 is a right side view of FIG. 1;

FIG. 5 is a top view of FIG. 4;

fig. 6 is a schematic perspective view of the lower teeth.

The actual correspondence between each label and the component name of the utility model is as follows:

10-airfoil assembly; 11-leaf; 12-upper positioning ring; 13-a lower positioning ring; 14-an outer sleeve;

a 20-bite assembly; 21-lower biting teeth; 22-upper biting teeth;

30-a drive assembly; 31-wheel axle; 32-a commutator; 33-speed increaser; 34-a hand wheel;

40-a frame; 41-a working table; 50-a guide rod; 61-positioning plates; 62-range-extending mounting rack;

70-positioning a loop bar; 71-shaft body; 72-a cylinder opening;

81-a first wear-resistant bushing; 82-a second wear-resistant bushing;

91-an inner housing; 92-housing.

Detailed Description

For ease of understanding, the specific structure and operation of the present utility model will be further described herein with reference to FIGS. 1-6:

1-5, the main structure of the concrete implementation structure of the utility model comprises a frame 40, a working table surface 41 made of artificial stone is paved on the frame 40, and a transparent outer cover 92 made of acrylic is covered on the working table surface 41; the housing 92 defines a viewing area therein. Wherein:

as shown in fig. 2-3, a guide rod 50 is coaxially arranged in the observation area, the top end of the guide rod 50 is fixed on a positioning plate 61 through a range-extending mounting frame 62, and the positioning plate 61 can be a floor slab or the like; the bottom end of the guide rod 50 then extends into the barrel cavity of the nozzle 72 of the positioning sleeve 70 after passing through the outer sleeve 14 of the fin assembly 10. A first wear bushing 81 is sandwiched between the barrel wall of the barrel port 72 and the outer wall of the guide rod 50.

At this time, it should be noted that the guide bar 50 is a fixed member, and the positioning sleeve 70 is controlled by the speed increaser 33 through the shaft 71 to form a movable member, so that there is a fit gap between the guide bar 50 and the positioning sleeve 70, that is, the rotation of the positioning sleeve 70 is fitted outside the guide bar 50.

For the drive assembly 30, it is shown with reference to fig. 1-2, which includes a hand wheel 34, an axle 31, a commutator 32, and a speed increaser 33 arranged in order along the force transmission direction. At this time, the wheel shaft 31 is horizontally rotatably fitted under the table 41 through the bearing housing, and the hand wheel 34 is fixed to the input end, i.e., the operation end, of the wheel shaft 31. The output end of the wheel shaft 31 is coaxially and fixedly connected with the input shaft of the commutator 32, the output shaft of the commutator 32 is coaxially matched with the input port of the speed increaser 33, and the output port of the speed increaser 33 is coaxially fixed with the engagement assembly 20, so that the engagement assembly 20 is driven to generate a rotation motion, and the whole fin assembly 10 is driven to generate a rotation or even a lift motion. The commutator 32 and the speed increaser 33 are commercially available components, and will not be described in detail here.

For the biting assembly 20, it includes an upper biting tooth 22 and a lower biting tooth 21, which are engaged with each other, so that the teeth are engaged. In design, the two engaging teeth can be simply straight gear structures protruding axially, and more preferably have inclined teeth structures with teeth inclined to one side. Of course, the lower teeth 21 are most preferably angled to one side as shown with reference to FIG. 6, while the mating surfaces also present a concave trough-like configuration to accommodate the corresponding convex surfaces at the upper teeth 22 to ensure a mating effect therebetween, ultimately ensuring a sustained pivoting action of the airfoil assembly 10 upon application of force. When the rotational speed of the lower teeth 21 is lower than that of the upper teeth 22, the lift force set at this time reaches the set value again, and the upper teeth 22 will naturally disengage from the lower teeth 21, thereby completing the lift function of the airfoil assembly 10. Of course, the use of the aforementioned magnetic actuation structure is also possible.

For the airfoil assembly 10, as shown in FIGS. 2-3, it includes an upper retaining ring 12 for securing the blades 11, a lower retaining ring 13 for securing the upper snap teeth 22, and an outer sleeve 14 connecting the upper retaining ring 12 and the lower retaining ring 13. The outer sleeve 14 is coaxially sleeved outside the guide rod 50 and depends on the second wear-resistant bush 82 to achieve the wear-resistant and friction-reducing effects of the corresponding guide ring.

In the structure shown in fig. 2, an inner cover 91 of opaque material is also arranged, the purpose of which is to conceal the upper and lower biting teeth 22 and 21, thereby ensuring the cleanliness of the overall appearance. A cushion layer may be disposed at the top end of the inner cover 91.

In actual operation, a participant can drive the bamboo dragonfly, i.e., the wing assembly 10, to rotate through the wheel shaft 31, the reverser 32, the speed increaser 33 and the engagement assembly 20 by rotating the hand wheel 34 beside the device. The rotation of the bamboo dragonfly forms a lifting force; when the rotation speed of the lower engaging teeth 21 is lower than that of the upper engaging teeth 22, the set lifting force reaches the set value, the upper engaging teeth 22 and the lower engaging teeth 21 are disjointed, and the bamboo dragonfly ascends along a vertical track, namely the guide rod 50, so that the lifting action is realized. When the bamboo dragonfly rises to the high altitude, the rotation speed gradually slows down, and falls back to the initial position under the action of gravity.

It will be understood by those skilled in the art that the present utility model is not limited to the details of the foregoing exemplary embodiments, but includes other specific forms of the same or similar structures that may be embodied without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

The technology, shape, and construction parts of the present utility model, which are not described in detail, are known in the art.

Claims (10)

1. The utility model provides a bamboo dragonfly presentation device, includes wing piece subassembly (10) that the axis plumbed arrangement and is located interlock subassembly (20) of wing piece subassembly (10) below, thereby interlock subassembly (20) are through drive assembly (30) drive wing piece subassembly (10) department blade (11) produce gyration and lift action, its characterized in that: the driving assembly (30) comprises an axle (31) which is rotatably matched with the frame (40), the output end of the axle (31) is coaxially and fixedly connected with the input shaft of the commutator (32), and the output shaft of the commutator (32) is coaxially matched with the input port of the speed increaser (33); the output port of the speed increaser (33) is coaxially fixed with the occluding component (20), so that the occluding component (20) is driven to rotate.

2. The bamboo dragonfly presentation device of claim 1, wherein: the device also comprises a guide rod (50) with a plumb axis and used for guiding the advancing direction of the wing panel component (10), wherein the top end of the guide rod (50) is fixed at the positioning plate (61), the bottom end of the guide rod extends downwards and penetrates into a sleeve cavity of the positioning sleeve rod (70), and a rotary fit is formed between the bottom end of the guide rod (50) and the positioning sleeve rod (70); the bottom end of the positioning sleeve rod (70) is fixedly connected with an output port of the speed increaser (33); the vane (11) of the vane component (10) is sleeved at the guide rod (50), and the bottom end of the vane component (10) and the top end of the positioning sleeve rod form gear engagement or magnetic force engagement.

3. The bamboo dragonfly presentation device of claim 2, wherein: the positioning sleeve rod (70) comprises a shaft body (71) and a cylinder opening (72) which is coaxially arranged at the top end of the shaft body (71) and is provided with an upward opening, a mounting hole is vertically penetrated through the working table (41) of the stand (40), and the shaft body (71) coaxially penetrates through the mounting hole and is in bearing fit with the outer wall of the speed increaser (33); a first wear-resistant bushing (81) is clamped between the cylinder cavity wall of the cylinder opening (72) and the outer wall of the guide rod (50).

4. A bamboo dragonfly demonstrating device as claimed in claim 3 wherein: the occlusion component (20) comprises lower occlusion teeth (21) and upper occlusion teeth (22) which are in tooth-shaped fit with the lower occlusion teeth (21), the lower occlusion teeth (21) are single-tooth-shaped protruding upwards along the axis of the positioning sleeve rod (70), and the teeth of the lower occlusion teeth (21) are helical teeth which incline towards the rotation direction of the blade (11); the bottom ends of the lower engaging teeth (21) extend downwards and are fixed between the first wear-resistant bushing (81) and the cylinder cavity wall of the cylinder opening (72) through fastening screws; an upper biting tooth (22) is secured to the airfoil assembly (10) at the bottom end thereof.

5. The device for demonstrating a bamboo dragonfly as claimed in claim 4, wherein: the wing panel assembly (10) comprises an outer sleeve (14) coaxially sleeved outside the guide rod (50), the top end of the outer sleeve (14) is used for fixing the blade (11) through an upper locating ring (12), and the bottom end of the outer sleeve (14) is used for fixing the lower occlusion teeth (21) through a lower locating ring (13).

6. The device for demonstrating bamboo dragonfly as claimed in claim 5, wherein: and the inner annular surfaces of the upper positioning ring (12) and the lower positioning ring (13) are respectively provided with a second wear-resistant bushing (82).

7. A bamboo dragonfly presentation device as claimed in claim 3, 4 or 5, wherein: the device further comprises an opaque inner cover (91) for shielding the mounting hole.

8. A bamboo dragonfly presentation device as claimed in claim 2 or 3 or 4 or 5, wherein: the top end of the guide rod (50) is connected with the positioning plate (61) through a range-extending mounting frame (62).

9. A bamboo dragonfly presentation device as claimed in claim 2 or 3 or 4 or 5, wherein: the device also comprises a transparent outer cover body (92) made of acrylic material, wherein the outer cover body (92) is in a straight cylinder shape coaxial with the axis of the guide rod (50), and the bottom of the outer cover body (92) is fixed on a workbench surface (41) of the frame (40).

10. A bamboo dragonfly presentation device as claimed in claim 1 or 2 or 3 or 4 or 5, wherein: the wheel axle (31) horizontally penetrates through two bearing seats at the bottom of the workbench surface (41) at the stand (40), so that a rotary structure is formed, and a hand wheel (34) convenient to operate is arranged at the input end of the wheel axle (31).