CN113058272A

CN113058272A - Amusement rotary table

Info

Publication number: CN113058272A
Application number: CN202110369929.1A
Authority: CN
Inventors: 李新亚
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-07-02
Anticipated expiration: 2041-04-02
Also published as: CN113058272B

Abstract

The invention relates to a recreation turntable, which comprises a pit (18), a turntable, a wheelchair, a traction device and a power transmission system. The amusement turntable can enable children and teenagers to obtain multi-aspect physical perceptual knowledge, and the physical perceptual knowledge is obtained in an easy and pleasant amusement process, is impressive and firm in memory, and lays a good foundation for learning physics in the future; the amusement turntable can enable a plurality of amusement persons to play simultaneously, and has high economic benefit and social benefit; the amusement turntable is convenient and fast for an amusement player to go up and down the turntable (2); the amusement turntable has no potential safety hazard, can prevent an amusement player from separating from a wheelchair, can prevent the wheelchair from separating from the turntable (2), and can prevent the wheelchairs from colliding with each other; the amusement turntable can also enable the middle-aged and the old to experience physical miraculous experience, obtain joyful enjoyment in amusement and improve scientific literacy.

Description

Amusement rotary table

Technical Field

The invention relates to a recreation turntable, in particular to a recreation turntable which can enable children and teenagers to obtain a plurality of physical perceptual knowledge in recreation.

Background

Many middle school students, especially high school students, do not want to learn physics, fear learning physics. Have to learn physics, have low mood and lag in performance.

The physics is not difficult to learn, and the root cause is that students lack the physical and perceptual knowledge.

When the children and the teenagers enter the middle school or university to learn physics, the emotional feeling, the interest, the enthusiasm and the comprehension are different with the physical perceptual knowledge and without the physical perceptual knowledge.

Amusement equipment is manufactured according to physical laws and is one of the sources for acquiring physical perceptual knowledge. Children who do not play the slide even do not know that the gliding speed is higher and higher; when children playing the slide and learning the motion rule of objects on the inclined plane, the children are not only interested but also easy to understand.

Unfortunately, the amusement equipment is not of various types and is not popularized, and many children and teenagers never experience the amusement equipment, so that the physical perceptual knowledge is extremely poor.

Therefore, more people can learn good physics, more amusement equipment needs to be developed urgently at present, and more children and teenagers can obtain more comprehensive physical perceptual knowledge as soon as possible.

Disclosure of Invention

The invention aims to solve the technical problem of providing an amusement turntable which can enable children and teenagers to obtain a plurality of physical perceptual knowledge in amusement.

In order to solve the technical problem, the technical scheme of the invention is as follows:

a recreation turntable comprises a pit, a turntable, a wheelchair, a traction device and a power transmission system.

The amusement turntable can enable children and teenagers to obtain a plurality of physical perceptual knowledge in amusement, stimulate the desire to learn, cultivate physical interest and improve the enthusiasm of exploration; the middle-aged and the old can enjoy the fun brought by the application of the physical law admittedly.

The pit is positioned below the horizontal ground, is a cylindrical cavity, has an inner diameter far larger than the height, has a vertical axis, and is provided with a base below the bottom surface of the horizontal pit.

The base is cylindrical and is of a reinforced cement structure, the axis of the base is superposed with the axis of the pit, the outer diameter of the base is smaller than the inner diameter of the pit, the upper surface of the base is flush with the bottom surface of the pit, and k vertical bolts are fixedly installed in the base; the k bolts are uniformly distributed on the same circumference around the axis of the base, the radius of the circumference is r, and the upper ends of the k bolts vertically extend upwards from the upper surface of the base.

The turntable comprises upright columns, a turntable, a sleeve, a main bearing, a bottom plate, an auxiliary bearing, a baffle plate, a cushion pad and an intermittent driving device.

The bottom plate is a horizontal thick circular plate, the axis of the bottom plate is superposed with the axis of the base, and k vertical bolt holes are formed in the bottom plate; the k bolt holes are uniformly distributed on the same circumference around the axis of the bottom plate, and the radius of the circumference is r; the k bolt holes on the bottom plate are respectively sleeved on the k bolts on the base, and k nuts are respectively screwed on the k bolts to fixedly connect the bottom plate on the upper surface of the base.

The vertical column is a vertical cylinder, the axis of the vertical column coincides with the axis of the bottom plate, the axial height of the vertical column is greater than the depth of the pit, and the lower end face of the vertical column is fixedly connected with the upper surface of the bottom plate at the corresponding position.

The axis of the turntable is superposed with the axis of the upright column, the length of the outer diameter of the turntable is close to the length of the inner diameter of the pit but smaller than the length of the inner diameter of the pit, the center of the turntable is provided with a disc hole, the upper surface of the turntable is provided with n pairs of disc grooves, and n is an even number; the axis of the disc hole is superposed with the axis of the rotary disc, and the inner diameter of the disc hole is larger than the outer diameter of the upright post; the two disc grooves of each pair of disc grooves are straight grooves which are parallel to each other, wherein the central line is in the radial direction of the turntable; the n pairs of disk slots are evenly distributed on the turntable so that any pair of disk slots must have another pair of disk slots symmetrical to it.

The axial line of the sleeve is superposed with the axial line of the upright post, the axial height of the sleeve is less than the depth of the pit but greater than the thickness of the turntable, the inner diameter of the sleeve is greater than the outer diameter of the upright post, the outer diameter of the sleeve is greater than the inner diameter of the upper disc hole of the turntable, the upper end of the sleeve is forcibly inserted into the disc hole of the turntable and is fixedly connected with the turntable, and the upper end face of the sleeve is flush with the upper surface of the turntable.

The outer circumferential surfaces of the outer rings of the two main bearings are fixedly connected with the inner circumferential surfaces of the sleeves at corresponding positions respectively, the inner circumferential surfaces of the inner rings of the two main bearings are fixedly connected with the outer circumferential surfaces of the upright columns at corresponding positions respectively, and the axes of the two main bearings are superposed with the axes of the upright columns; one main bearing is positioned at the upper port of the sleeve, and the other main bearing is positioned at the lower port of the sleeve; the upper surface of the turntable is flush with the ground of the pithead of the pit.

Two auxiliary bearings, which are both positioned above the sleeve, wherein the inner circumferential surfaces of the inner rings of the two auxiliary bearings are respectively fixedly connected with the outer circumferential surfaces of the upright posts at corresponding positions; one of the two secondary bearings is located close to the sleeve and the other is located at the upper end of the upright.

The baffle is rectangular in outline, the inner surface and the outer surface of the baffle are both arc surfaces, and the axes of the inner surface and the outer surface of the baffle are both superposed with the axis of the turntable; n baffles are uniformly distributed and vertically arranged on the disk surface at the edge of the rotating disk, are respectively and positively opposite to n pairs of disk grooves on the adjacent rotating disk along the radial direction, and the lower end surfaces of the baffles are respectively and fixedly connected with the upper surface of the rotating disk at the corresponding position.

The shape of the outline of the buffer pad is the same as that of the outline of the baffle, the area of the outline of the buffer pad is equal to that of the outline of the baffle, the inner surface of the buffer pad is a vertical plane, the outer surface of the buffer pad is an arc surface, and the axis of the outer surface of the buffer pad is superposed with the axis of the turntable; the outer surfaces of the n cushion pads are fixedly connected with the inner surfaces of the n baffles respectively.

The intermittent driving device comprises a ratchet wheel, a pawl shaft, an elastic sheet and an intermittent bearing.

The ratchet wheel is in a ring shape, the axis of the ratchet wheel is superposed with the axis of the sleeve, and ratchet wheel teeth extending inwards are arranged on the inner edge of the lower end of the ratchet wheel; the tooth tips of the ratchet teeth are positioned on the same circumference, the axis of the circumference is coincident with the axis of the ratchet, and the diameter of the circumference is smaller than the inner diameter of the ratchet but larger than the outer diameter of the sleeve.

The outer circumferential surface of the outer ring of the intermittent bearing is fixedly connected with the inner circumferential surface of the ratchet wheel, and the inner circumferential surface of the inner ring of the intermittent bearing is fixedly connected with the outer circumferential surface of the lower end of the sleeve; the tooth tips of the ratchet teeth on the ratchet wheel are close to the lower end surface of the sleeve.

The upper ends of the two pawl shafts are respectively and vertically and fixedly connected to the cylinder wall of the lower end surface of the sleeve, and the connecting line of the two pawl shafts is orthogonal to the axis of the sleeve.

And the two pawls are respectively sleeved on the two pawl shafts, can rotate on a horizontal plane around the corresponding pawl shafts, and cannot move along the axial direction.

One end of each elastic sheet is fixedly connected to the cylinder wall of the lower end face of the sleeve beside the two pawls, and the other end of each elastic sheet is pressed on the two pawls, so that the two pawls are respectively inserted into tooth grooves of ratchet teeth on the ratchet wheel at corresponding positions.

Looking up at the ratchet wheel, when the ratchet wheel rotates along the anticlockwise direction, the ratchet wheel teeth on the ratchet wheel push the two pawls, and then the sleeve is driven to synchronously rotate along the anticlockwise direction; when the ratchet is at rest, the pawls do not affect the rotation of the sleeve in the counterclockwise direction.

The wheelchair comprises a flat car and a chair.

The flat car consists of a flat plate, step wheels and wheel shafts.

The flat plate is a horizontal rectangular plate, and the longitudinal length of the flat plate is greater than the transverse width of the flat plate.

Two wheel shafts which are respectively transversely and fixedly connected with the flat plate in tandem, and the two ends of each wheel shaft extend outwards from the two sides of the flat plate.

The step wheel is combined by a side wheel and a track wheel into a coaxial whole, the outer diameter of the side wheel is larger than that of the track wheel, and the side wheel is positioned on the outer side of the track wheel; four step wheels are arranged on the flat plate, two of the four step wheels are respectively sleeved on two extending ends of the front wheel shaft of the flat plate, the other two step wheels are respectively sleeved on two extending ends of the rear wheel shaft of the flat plate, and the four step wheels can freely rotate on a vertical plane around respective axes but cannot move along the axial direction.

n flat cars are respectively placed on the n pairs of disc grooves of the turntable; among the four step wheels on each flat car, the side wheels on the two step wheels on the same side are inserted into the disc grooves on the corresponding sides of the corresponding pair of disc grooves, the side wheels on the other two step wheels on the other side are inserted into the disc grooves on the other side of the pair of disc grooves, the rail wheels on the four step wheels are in movable contact with the upper surface of the rotary disc at the corresponding positions, and when the rail wheels on the four step wheels roll along the same direction of the upper surface of the rotary disc 2, the flat car 9 can only move along the radial direction and cannot move along the tangential direction relative to the rotary disc 2.

The chair is provided with a safety belt, one side of the chair is hung with a ball frame, and a plurality of soft balls are placed in the ball frame.

The n chairs are respectively and fixedly connected to the flat plates of the n flat cars, and when n players respectively sit on the n chairs, the n players all face the upright post.

The traction device comprises a rope and a spring.

One end of each of the n ropes is fixedly connected with the outer circumferential surface of the auxiliary bearing outer ring at the corresponding position and positioned at the upper end of the upright post, and the other end of each of the n ropes extends to the n chairs along the radial direction and is placed in the corresponding ball frame for later use.

One end of each of the n springs is fixedly connected with the outer circumferential surface of the auxiliary bearing outer ring close to the sleeve at the corresponding position, and the other end of each of the n springs extends to the n flatbeds along the radial direction and is movably hooked with the front ends of the flat plates on the n flatbeds.

The power transmission system includes an electric motor, an output pulley, and a belt.

The output wheel is fixedly sleeved on the output shaft of the motor.

The belt is sleeved on the output wheel and the ratchet wheel of the intermittent driving device.

Looking up at the intermittent driving device, when the motor works, the motor drives the ratchet wheel to rotate along the anticlockwise direction through the transmission of the belt, the ratchet wheel pushes the two pawls on the sleeve barrel through the ratchet wheel teeth on the ratchet wheel, so that the sleeve barrel synchronously rotates along the anticlockwise direction, and the sleeve barrel drives the turntable to synchronously rotate along the anticlockwise direction; when the motor stops working, the two pawls do not prevent the sleeve from rotating in the counterclockwise direction, so that the rotating disc is connected to enable the sleeve to continue to rotate in the counterclockwise direction due to inertia; the turntable has larger moment of inertia, so the turntable has larger rotational kinetic energy and small frictional resistance, and the turntable can rotate for a longer time according to the law of energy conservation, so that n players respectively sitting on n chairs can have enough time to play.

The amusement turntable can lead children and teenagers to obtain a plurality of physical perceptual knowledge in the amusement, stimulate the desire to learn, cultivate physical interest and improve the enthusiasm of exploration.

After n players respectively sit on n chairs, the safety belts are firmly tied, and then the players begin to play; the following physical and sensory recognition can be obtained in the game:

firstly, a spring is separated from a corresponding flat car, a player on the flat car pulls a corresponding rope tightly by a hand to ensure that the position of the flat car relative to a turntable is unchanged, then a motor drives the turntable to rotate slowly and quickly, and the player feels that the force of a rope handle is gradually increased; when the rotating speed of the turntable is constant, the player is connected to form the flat car to slowly get away from the upright post, and the force of the rope handle is larger.

The player obtains the perceptual knowledge of Newton's third law through the in-person feeling, obtains the perceptual knowledge of centripetal force, obtains the perceptual knowledge that the centripetal force increases with the increase of the angular velocity under the condition that the circular motion radius is not changed and the mass is not changed, and obtains the perceptual knowledge that the centripetal force increases with the increase of the circular motion radius under the condition that the angular velocity is not changed and the mass is not changed.

Secondly, the rope is idle, the spring is hooked with the corresponding flat car, and the motor drives the turntable to rotate slowly and acceleratively; the spring is gradually extended only when the flat car is gradually separated from the upright.

The player obtains the perceptual knowledge that the spring can provide centripetal force through the in-person feeling, and obtains the perceptual knowledge that the elastic force of the spring is increased along with the increase of the elongation of the spring.

Thirdly, the rope is idle, the spring is hooked with the corresponding flat car, after the motor drives the turntable to rotate, the back of the player on the flat car is tightly pressed on the back plate of the corresponding chair, and the upper body is difficult to tilt forwards; the higher the rotating speed of the turntable is, the more difficult the upper body is to tilt forwards; if one wants to lean forward, one needs to pull the chair backward with hand force, unlike the case of sitting on a stool at home.

The amusement player obtains the perceptual knowledge that the centripetal force is required for the circular motion of any object (such as the above object) through the in-person feeling, obtains the perceptual knowledge that various methods provide the centripetal force, and obtains the perceptual knowledge of Newton's third law.

Fourthly, n ropes are idle, n springs are respectively hooked with n flatbeds, and the motor drives the turntable to rotate at a constant rotating speed; when the n flat cars are kept relatively still relative to the turntable, some players are farthest away from the upright post and some players are closest to the upright post; it was observed that the players furthest from the post were fat or tall and the players closest to the post were lean or short.

The player obtains a feeling recognition that the larger the mass of the object is, the larger the centripetal force is required to be, when the angular velocity is the same, the circular motion object is made by the personal feeling.

Fifthly, the rope is idle, the spring is hooked with the corresponding flat car, and the motor drives the turntable to rotate at a constant rotating speed; the player on the flat car throws the soft ball vertically upwards, but the thrown soft ball does not fall back into the hand, but flies away to the left of the throwing point, unlike the situation of throwing the soft ball standing on the ground.

The player obtains the perceptual knowledge of inertia and the speed direction of the circular motion object as the tangential direction through the in-person feeling.

Sixthly, the rope is idle, the spring is hooked with the corresponding flat car, and the motor drives the turntable to rotate at a constant rotating speed; the player on the flat car throws the soft balls horizontally to the left and to the right at the same hand-out speed, respectively, and the player finds that the soft balls thrown to the left fly far and the soft balls thrown to the right fly close.

The player obtains the perceptual knowledge of the speed division and the speed combination through the personal feeling, and obtains the perceptual knowledge of the speed combination on the same straight line.

Seventhly, two ropes which are symmetrical to each other are idle, two springs which are symmetrical to each other are respectively hooked with the corresponding flat car, and the motor drives the turntable to rotate at a constant rotating speed; two mutually symmetrical amusement persons mutually transmit soft balls, and the soft balls cannot be transmitted to the other side according to a ball transmission mode on the ground, so that a rough method is finally realized through continuous exploration.

The player obtains the perceptual knowledge of the synthesis of two speeds forming angles with each other through the personal feeling.

Eight springs are respectively hooked with n flat cars, the motor stops working, and when the turntable rotates, n players respectively pull respective ropes simultaneously to enable the n flat cars to approach the stand column.

The amusement player obtains the perceptual knowledge of the rotational inertia through the in-person feeling, and obtains the perceptual knowledge of the conservation of the angular momentum of the system under the condition that the resultant external force moment of the system is zero or can be ignored.

The amusement turntable enables children and teenagers participating in amusement to obtain a large amount of physical perceptual knowledge, and lays a good foundation for the children and the teenagers to learn physics in the future.

After the structure is adopted, the amusement turntable can provide various amusement contents for the amusement, so that the amusement can obtain various physical and perceptual knowledge, although the amusement can not be understood at the moment and a question is left, the question is a big good thing, the question can be converted into physical learning power in the future, and the question is solved and then converted into interest.

With this structure, since the sensory recognition is obtained during the light and pleasant amusement, the sensory recognition is impressive and the memory is firm.

After the structure is adopted, the traction device of the flat car can be a rope or a spring, so that the amusement turntable can enable an amusement player to obtain more physical perception.

After the structure is adopted, due to the arrangement of the intermittent driving device and the arrangement of the two main bearings, the two auxiliary bearings and the intermittent bearing, the friction resistance is greatly reduced, so that after the motor stops working, the turntable can rotate for a long enough time, and an amusement player can obtain the perceptual knowledge of the rotational inertia and the system angular momentum conservation.

After the structure is adopted, the amusement turntable can enable n amusement persons to play simultaneously, so that the economic benefit is improved, and the social benefit is also improved.

After adopting such structure, because the upper surface of carousel flushes with the pithead ground of pit, the player goes up the carousel very convenient and fast from top to bottom.

After the structure is adopted, due to the arrangement of the safety belt, the arrangement of the baffle and the buffer pad and the arrangement of the step wheels and the plate grooves, not only can the amusement person be prevented from separating from the wheelchair, but also the wheelchair can be prevented from separating from the rotary plate, the mutual collision between the wheelchairs can be prevented, and the potential safety hazard of the amusement rotary plate is eliminated.

After the structure is adopted, although the invention aims to make children and teenagers obtain physical perceptual knowledge in relaxed and joyful amusement, the invention can also make middle-aged and elderly people experience physical magical, obtain fun in amusement and improve scientific literacy.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic vertical section of an amusement turntable, on which section the vertical axis of the column is located.

Fig. 2 is a schematic vertical section of the turntable, on which section the axis of an axle on a flat car is located.

Fig. 3 is a schematic top view of the amusement turntable, but the chair, rope and secondary bearings at the upper end of the uprights are not shown.

Fig. 4 is a schematic bottom view of the intermittent drive but with the intermittent bearing mostly hidden by the ratchet teeth of the ratchet and the column and main bearing not shown.

Detailed Description

As shown in each of fig. 1 to 4, an amusement turntable comprises a pit 18, a turntable, a wheelchair, a traction device and a power transmission system.

The amusement turntable can enable children and teenagers to obtain a plurality of physical perceptual knowledge in amusement, stimulate the desire to learn, cultivate physical interest and improve the enthusiasm of exploration. The middle-aged and the old can enjoy the fun brought by the application of the physical law admittedly.

As shown in fig. 1, the pit 18, which is located below the horizontal ground, is a cylindrical cavity with an inner diameter much larger than the height, and its axis is vertical, and there is a base 7 below the bottom of the horizontal pit.

As shown in fig. 1, the base 7, which is cylindrical and has a reinforced concrete structure, has an axis coinciding with the axis of the pit 18, an outer diameter smaller than the inner diameter of the pit 18, an upper surface flush with the bottom surface of the pit 18, and k vertical bolts 8 fixedly mounted inside. The k bolts 8 are uniformly distributed on the same circumference around the axis of the base 7, and the circumference has a radius r, and the upper ends of the k bolts vertically protrude upward from the upper surface of the base 7.

As shown in each of fig. 1 to 4, the turntable includes a column 1, a turntable 2, a sleeve 3, a main bearing 4, a bottom plate 6, a sub-bearing 14, a baffle plate 19, a cushion pad 20, and an intermittent drive device.

As shown in fig. 1, the bottom plate 6 is a horizontal thick circular plate, the axis of which coincides with the axis of the base 7, and is provided with k vertical bolt holes 6 a. The k bolt holes 6a are evenly distributed on the same circumference around the axis of the base plate 6, and the radius of the circumference is r. The k bolt holes 6a on the bottom plate 6 are respectively sleeved on the k bolts 8 on the base 7, and k nuts are respectively screwed on the k bolts 8 to fixedly connect the bottom plate 6 on the upper surface of the base 7.

As shown in fig. 1, the column 1, which is a vertical cylinder, has an axis coinciding with the axis of the bottom plate 6, an axial height greater than the depth of the pit 18, and a lower end surface fixedly connected to the upper surface of the bottom plate 6 at a corresponding position.

As shown in fig. 1 and 3, the axis of the turntable 2 coincides with the axis of the column 1, the outer diameter of the turntable has a length close to the length of the inner diameter of the pit 18 but less than the length of the inner diameter of the pit 18, the center of the turntable has a disc hole 1a, and the upper surface of the turntable has n pairs of disc grooves 1b, wherein n is an even number. The axis of the disc hole 1a coincides with the axis of the rotating disc 2, and the inner diameter thereof is larger than the outer diameter of the upright post 1. The two disc grooves 1b of each pair of disc grooves 1b, which are straight grooves, are parallel to each other with their median line in the radial direction of the turntable 2. The n pairs of disc slots 1b are evenly distributed on the turntable 2 so that any pair of disc slots 1b must have another pair of disc slots 1b symmetrical thereto.

As shown in fig. 1, the axial line of the sleeve 3 coincides with the axial line of the column 1, the axial height of the sleeve is smaller than the depth of the pit 18 but larger than the thickness of the turntable 2, the inner diameter of the sleeve is larger than the outer diameter of the column 1, the outer diameter of the sleeve is larger than the inner diameter of the disc hole 1a on the turntable 2, the upper end of the sleeve is forcibly inserted into the disc hole 1a of the turntable 2 and is fixedly connected with the turntable 2, and the upper end face of the sleeve is flush with the upper surface of the turntable 2.

As shown in fig. 1, the outer circumferential surfaces of the outer rings of the two main bearings 4 are fixedly connected to the inner circumferential surfaces of the sleeves 3 at the corresponding positions, respectively, and the inner circumferential surfaces of the inner rings thereof are fixedly connected to the outer circumferential surfaces of the columns 1 at the corresponding positions, respectively, and the axes thereof are coincident with the axis of the column 1. Of these main bearings 4, one main bearing 4 is located at the upper port of the sleeve 3, and the other main bearing 4 is located at the lower port of the sleeve 3. The upper surface of the turntable 2 is flush with the crater floor of the pit 18.

As shown in fig. 1, two pairs of bearings 14, each of which is located above the sleeve 3, have inner circumferential surfaces fixedly connected to outer circumferential surfaces of the column 1 at corresponding positions, respectively. Of these two secondary bearings 14, one secondary bearing 14 is located close to the sleeve 3 and the other secondary bearing 14 is located at the upper end of the column 1.

As shown in fig. 1 and 3, the baffle plate 19 has a rectangular outline, and has circular arc surfaces on both inner and outer surfaces, and the axes of both the inner and outer surfaces coincide with the axis of the turntable 2. n baffles 19 are uniformly distributed and erected on the disk surface at the edge of the rotating disk 2, are respectively and directly opposite to n pairs of disk slots 1b on the adjacent rotating disk 2 along the radial direction, and are respectively and fixedly connected with the upper surface of the rotating disk 2 at the corresponding position on the lower end surface.

As shown in fig. 1 and 3, the cushion pad 20 has a contour having the same shape and the same area as the contour of the baffle 19, an inner surface thereof being a vertical plane, an outer surface thereof being a circular arc surface, and an axis of the outer surface thereof coinciding with an axis of the turntable 2. The outer surfaces of the n cushions 20 are fixedly connected to the inner surfaces of the n baffles 19, respectively.

As shown in fig. 1 and 4, the intermittent drive device includes a ratchet 5, a pawl 22, a pawl shaft 15, a spring piece 23, and an intermittent bearing 24.

As shown in fig. 1 and 4, the ratchet 5 is circular, and has an axis coinciding with the axis of the sleeve 3, and has inwardly extending ratchet teeth 5a on the inner edge of the lower end thereof. The tips of the ratchet teeth 5a are located on the same circumference whose axis coincides with the axis of the ratchet 5, and the diameter of the circumference is smaller than the inner diameter of the ratchet 5 but larger than the outer diameter of the sleeve 3.

As shown in fig. 1, the intermittent bearing 24 has an outer circumferential surface of an outer ring fixedly coupled to an inner circumferential surface of the ratchet 5 and an inner circumferential surface of an inner ring fixedly coupled to an outer circumferential surface of a lower end of the sleeve 3. The tips of the ratchet teeth 5a on the ratchet 5 approach the lower end surface of the sleeve 3.

As shown in fig. 1 and 4, the upper ends of the two pawl shafts 15 are respectively vertically and fixedly connected to the cylinder wall of the lower end surface of the sleeve 3, and the line connecting the two pawl shafts 15 is orthogonal to the axis of the sleeve 3.

As shown in fig. 1 and 4, the two pawls 22, which are respectively fitted around the two pawl shafts 15, are rotatable on a horizontal plane about the respective pawl shafts 15, but are not movable in the axial direction.

As shown in fig. 4, one end of each of the two resilient pieces 23 is fixedly connected to the wall of the lower end surface of the sleeve 3 adjacent to the two pawls 22, and the other end of each of the resilient pieces presses against the two pawls 22, so that the two pawls 22 are inserted into the tooth grooves of the ratchet teeth 5a of the ratchet 5 at the corresponding positions.

As shown in FIG. 4, looking down on the ratchet wheel 5, when the ratchet wheel 5 rotates in the counterclockwise direction, the ratchet teeth 5a of the ratchet wheel 5 push the two pawls 22, thereby driving the sleeve 3 to rotate synchronously in the counterclockwise direction. When the ratchet 5 is at rest, the pawls 22 do not affect the rotation of the sleeve 3 in the counter-clockwise direction.

As shown in fig. 1, the wheelchair comprises a flat bed 9 and a chair 12.

As shown in fig. 1, 2 and 3, the flat car 9 is composed of a flat plate 10, a step wheel 11 and an axle 21.

As shown in fig. 1 and 3, the flat plate 10 is a horizontal rectangular plate, and the longitudinal length of the flat plate is greater than the transverse width of the flat plate.

As shown in fig. 1 and 2, two axles 21 are transversely and fixedly connected to the plate 10 in tandem, and both ends of the axles extend outward from both sides of the plate 10.

As shown in fig. 1 and 2, the stepped pulley 11 is formed by combining a side pulley 11a and a track pulley 11b into a coaxial unit, the outside diameter of the side pulley 11a is larger than that of the track pulley 11b, and the side pulley 11a is located outside the track pulley 11 b. Four step wheels 11 are installed on the flat plate 10, of the four step wheels 11, two step wheels 11 are respectively sleeved on two extending ends of a front wheel shaft 21 of the flat plate 10, the other two step wheels 11 are respectively sleeved on two extending ends of a rear wheel shaft 21 of the flat plate 10, and the four step wheels 11 can freely rotate on a vertical plane around respective axes but cannot move along the axial direction.

As shown in fig. 3, n flat cars 9 are placed on the n pairs of tray grooves 1b of the turntable 2, respectively; of the four step wheels 11 on each flat car 9, the side wheels 11a on the two step wheels 11 on the same side are inserted into the disc grooves 1b on the corresponding side of the corresponding pair of disc grooves 1b, the side wheels 11a on the other two step wheels 11 on the other side are inserted into the disc grooves 1b on the other side of the pair of disc grooves 1b, the rail wheels 11b on the four step wheels 11 are in movable contact with the upper surface of the rotary disc 2 at the corresponding positions, and when the rail wheels 11b on the four step wheels 11 roll in the same direction along the upper surface of the rotary disc 2, the flat car 9 can move only in the radial direction and can not move in the tangential direction relative to the rotary disc 2.

As shown in FIG. 1, the chair 12 is equipped with a safety belt 13, and one side of the chair is hung with a ball frame in which a plurality of soft balls are placed.

As shown in fig. 1, n chairs 12 are fixedly connected to the plates 10 of the n platforms 9, respectively, and when n players sit on the n chairs 12, respectively, the n players face the upright 1.

As shown in fig. 1 and 3, the traction device comprises a rope 16 and a spring 17.

As shown in fig. 1, one ends of the n ropes are fixedly connected to the outer circumferential surface of the outer ring of the auxiliary bearing 14 at the upper end of the upright 1, and the other ends of the ropes extend to the n chairs 12 in the radial direction and are placed in the corresponding ball frames for standby.

As shown in fig. 1 and 3, the n springs 17 are fixedly connected at one ends thereof to the outer circumferential surfaces of the outer rings of the auxiliary bearings 14 at the corresponding positions near the sleeve 3, respectively, and extend at the other ends thereof to the n dollies 9 in the radial direction, respectively, and are movably hooked to the front ends of the plates 10 on the n dollies 9, respectively.

The output wheel is fixedly sleeved on the output shaft of the motor.

The belt is fitted over the output wheel and the ratchet wheel 5 of the intermittent drive.

As shown in fig. 1 and 4, when the intermittent driving device is viewed from the bottom, the motor is driven by the belt to rotate the ratchet wheel 5 in the counterclockwise direction, the ratchet wheel 5 pushes the two pawls 22 on the sleeve 3 through the ratchet teeth 5a on the ratchet wheel 5, so that the sleeve 3 rotates in the counterclockwise direction synchronously, and the sleeve 3 drives the turntable 2 to rotate in the counterclockwise direction synchronously. When the motor stops, the pawls 22 do not prevent the sleeve 3 from rotating counterclockwise, so that the turntable 2 is connected such that the sleeve 3 continues to rotate counterclockwise due to inertia. The turntable 2 has a large moment of inertia, so that the turntable 2 has a large kinetic energy of rotation and a small frictional resistance, and according to the law of conservation of energy, the turntable 2 can rotate for a long time, so that n players sitting on n chairs 12 respectively have sufficient time to play.

After the n players respectively sit on the n chairs 12, the safety belts 13 are firmly fastened, and then the amusement is started. The following physical and sensory recognition can be obtained in the game:

first, as shown in fig. 1, spring 17 is disengaged from corresponding carriage 9, and a player on carriage 9 pulls corresponding rope 16 with his/her hand to maintain the position of carriage 9 relative to turntable 2, and then the motor drives turntable 2 to rotate at a slow acceleration, and the player feels the force of pulling rope 16 to increase gradually. When the rotating speed of the turntable 2 is constant, the player can be connected to make the flat car 9 slowly move away from the upright post 1, and feel that the force of the rope 16 pulling the handle is larger.

Secondly, as shown in fig. 1 and 3, the rope 16 is idle, the spring 17 is hooked with the corresponding flat car 9, and the motor drives the turntable 2 to rotate slowly and acceleratively. Only when the platform wagon 9 is gradually moved away from the upright 1, the spring 17 is gradually extended.

The player obtains a feeling that the spring 17 can provide the centripetal force by feeling in person, and obtains a feeling that the elastic force of the spring 17 increases with the increase of the elongation thereof.

Thirdly, as shown in fig. 1, the rope 16 is idle, the spring 17 is hooked with the corresponding flat car 9, and after the motor drives the rotating disc 2 to rotate, the back of the player on the flat car 9 is tightly pressed on the back plate of the corresponding chair 12, and the upper body is difficult to tilt forwards. The higher the rotating speed of the turntable 2 is, the more difficult the upper body is to tilt forwards; if one wants to lean forward, one needs to pull the chair 12 backward with hand force, unlike a home stool.

Fourthly, as shown in fig. 1, n ropes 16 are idle, n springs 17 are hooked with n flatbeds 9, respectively, and the motor drives the turntable 2 to rotate at a constant rotation speed. When the n flatbeds 9 are kept relatively still with respect to the carrousel 2, there are those players which are furthest from the upright 1 and those players which are closest to the upright 1. It was observed that the players furthest from the post 1 were fat or tall and the players closest to the post 1 were lean or short.

Fifthly, as shown in fig. 1, the rope 16 is idle, the spring 17 is hooked with the corresponding flat car 9, and the motor drives the turntable 2 to rotate at a constant rotating speed. The player on the flat car 9 throws the soft ball vertically upward, but the upward thrown soft ball does not fall back into the hand, but flies away to the left of the throwing point, unlike the case of throwing the soft ball standing on the ground.

Sixthly, as shown in fig. 1 and 3, the rope 16 is idle, the spring 17 is hooked with the corresponding flat car 9, and the motor drives the turntable 2 to rotate at a constant speed. The player who has shot the soft balls horizontally at the same hand-out speed to the left and right sides on the flat car 9 finds that the soft balls shot to the left fly far and the soft balls shot to the right fly near.

Seventhly, as shown in fig. 1 and 3, two ropes 16 which are symmetrical to each other are idle, two springs 17 which are symmetrical to each other are respectively hooked with the corresponding flat car 9, and the motor drives the turntable 2 to rotate at a constant rotating speed. Two mutually symmetrical amusement persons mutually transmit soft balls, and the soft balls cannot be transmitted to the other side according to a ball transmission mode on the ground, so that a rough method is finally realized through continuous exploration.

Eighthly, as shown in fig. 1 and 3, n springs 17 are respectively hooked with n flat cars 9, the motor stops working, and when the rotary disc 2 rotates, n players respectively pull the ropes 16 of the n flat cars to enable the n flat cars 9 to approach the upright post 1, and unexpected conditions occur, and the rotating speed of the rotary disc 2 is increased.

The embodiments of the present invention are described in detail above with reference to the accompanying drawings. The present invention is not limited to the above-described embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Variations that do not depart from the gist of the invention are intended to be within the scope of the invention.

Claims

1. An amusement turntable is characterized in that:

the amusement turntable comprises a pit (18), a turntable, a wheelchair, a traction device and a power transmission system;

the amusement turntable can enable children and teenagers to obtain a plurality of physical perceptual knowledge in amusement, stimulate the desire to learn, cultivate physical interest and improve the enthusiasm of exploration; the middle-aged and the old can enjoy the fun brought by the application of the physical law;

the pit (18) is positioned below the horizontal ground, is a cylindrical cavity, has an inner diameter far larger than the height, has a vertical axis, and is provided with a base (7) below the bottom surface of the horizontal pit;

the base (7) is cylindrical and is of a reinforced concrete structure, the axis of the base coincides with the axis of the pit (18), the outer diameter of the base is smaller than the inner diameter of the pit (18), the upper surface of the base is flush with the bottom surface of the pit (18), and k vertical bolts (8) are fixedly installed in the base; the k bolts (8) are uniformly distributed on the same circumference around the axis of the base (7), the radius of the circumference is r, and the upper ends of the k bolts vertically extend upwards from the upper surface of the base (7);

the turntable comprises an upright post (1), a turntable (2), a sleeve (3), a main bearing (4), a bottom plate (6), an auxiliary bearing (14), a baffle (19), a cushion pad (20) and an intermittent driving device;

the bottom plate (6) is a horizontal thick circular plate, the axis of the bottom plate is superposed with the axis of the base (7), and k vertical bolt holes (6a) are formed in the bottom plate; the k bolt holes (6a) are uniformly distributed on the same circumference around the axis of the bottom plate (6), and the radius of the circumference is r; the k bolt holes (6a) in the bottom plate (6) are respectively sleeved on the k bolts (8) on the base (7), k nuts are respectively screwed on the k bolts (8), and the bottom plate (6) is fixedly connected to the upper surface of the base (7);

the upright column (1) is a vertical cylinder, the axis of the upright column coincides with the axis of the bottom plate (6), the axial height of the upright column is greater than the depth of the pit (18), and the lower end face of the upright column is fixedly connected with the upper surface of the bottom plate (6) at a corresponding position;

the axis of the rotating disc (2) is coincident with the axis of the upright post (1), the length of the outer diameter of the rotating disc is close to the length of the inner diameter of the pit (18) but smaller than the length of the inner diameter of the pit (18), the center of the rotating disc is provided with a disc hole (1a), the upper surface of the rotating disc is provided with n pairs of disc grooves (1b), and n is an even number; the axis of the disc hole (1a) is coincident with the axis of the rotary disc (2), and the inner diameter of the disc hole is larger than the outer diameter of the upright post (1); two disc slots (1b) of each pair of disc slots (1b), which are straight slots, which are parallel to each other, wherein the line is in the radial direction of the turntable (2); the n pairs of disc slots (1b) are uniformly distributed on the rotating disc (2), so that any pair of disc slots (1b) must have another pair of disc slots (1b) which are symmetrical with the disc slots;

the axis of the sleeve (3) is coincident with the axis of the upright post (1), the axial height of the sleeve is less than the depth of the pit (18) but greater than the thickness of the rotary table (2), the inner diameter of the sleeve is greater than the outer diameter of the upright post (1), the outer diameter of the sleeve is greater than the inner diameter of a disc hole (1a) on the rotary table (2), the upper end of the sleeve is forcibly inserted into the disc hole (1a) of the rotary table (2) and is fixedly connected with the rotary table (2), and the upper end surface of the sleeve is flush with the upper surface of the rotary table (2);

the outer circumferential surfaces of the outer rings of the two main bearings (4) are fixedly connected with the inner circumferential surfaces of the sleeves (3) at corresponding positions respectively, the inner circumferential surfaces of the inner rings of the two main bearings are fixedly connected with the outer circumferential surfaces of the columns (1) at corresponding positions respectively, and the axes of the two main bearings are superposed with the axis of the column (1); one main bearing (4) of the two main bearings (4) is positioned at the upper port of the sleeve (3), and the other main bearing (4) is positioned at the lower port of the sleeve (3); the upper surface of the rotary disc (2) is flush with the ground of the pithead of the pit (18);

two auxiliary bearings (14) which are both positioned above the sleeve (3), and the inner circumferential surfaces of the inner rings of the two auxiliary bearings are fixedly connected with the outer circumferential surfaces of the upright posts (1) at corresponding positions respectively; one (14) of the two secondary bearings (14) is close to the sleeve (3), and the other (14) is positioned at the upper end of the upright post (1);

the baffle (19) is rectangular in outline, the inner surface and the outer surface of the baffle are both arc surfaces, and the axes of the inner surface and the outer surface of the baffle are both superposed with the axis of the turntable (2); n baffles (19) which are uniformly distributed and vertically arranged on the disk surface at the edge of the rotating disk (2), are respectively and positively opposite to n pairs of disk grooves (1b) on the adjacent rotating disk (2) along the radial direction, and are respectively and fixedly connected with the upper surface of the rotating disk (2) at the corresponding position on the lower end surface;

the shape of the outline of the buffer pad (20) is the same as that of the outline of the baffle (19), the area of the outline of the buffer pad is equal to that of the outline of the baffle (19), the inner surface of the buffer pad is a vertical plane, the outer surface of the buffer pad is an arc surface, and the axis of the outer surface of the buffer pad is superposed with the axis of the turntable (2); the outer surfaces of the n cushion pads (20) are respectively fixedly connected with the inner surfaces of the n baffles (19);

the intermittent driving device comprises a ratchet wheel (5), a pawl (22), a pawl shaft (15), an elastic sheet (23) and an intermittent bearing (24);

the ratchet wheel (5) is annular, the axis of the ratchet wheel is overlapped with the axis of the sleeve (3), and ratchet wheel teeth (5a) extending inwards are arranged on the inner edge of the lower end of the ratchet wheel; the tooth tips of the ratchet teeth (5a) are positioned on the same circumference, the axis of the circumference is coincident with the axis of the ratchet (5), and the diameter of the circumference is smaller than the inner diameter of the ratchet (5) but larger than the outer diameter of the sleeve (3);

the intermittent bearing (24) is fixedly connected with the outer circumferential surface of the outer ring of the intermittent bearing and the inner circumferential surface of the ratchet wheel (5), and is fixedly connected with the outer circumferential surface of the lower end of the sleeve (3); the tooth tips of the ratchet teeth (5a) on the ratchet (5) are close to the lower end surface of the sleeve (3);

the upper ends of the two pawl shafts (15) are respectively and vertically and fixedly connected to the cylinder wall of the lower end surface of the sleeve (3), and the connecting line of the two pawl shafts (15) is orthogonal to the axis of the sleeve (3);

the two pawls (22) are respectively sleeved on the two pawl shafts (15), can rotate on a horizontal plane around the corresponding pawl shafts (15), and cannot move along the axial direction;

one end of each elastic sheet (23) is fixedly connected to the cylinder wall of the lower end face of the sleeve (3) beside the two pawls (22), and the other end of each elastic sheet is pressed on the two pawls (22) respectively, so that the two pawls (22) are inserted into tooth grooves of ratchet teeth (5a) on the ratchet wheel (5) at corresponding positions respectively;

looking down at the ratchet wheel (5), when the ratchet wheel (5) rotates in the anticlockwise direction, the ratchet wheel teeth (5a) on the ratchet wheel (5) push the two pawls (22), and further the sleeve (3) is driven to synchronously rotate in the anticlockwise direction; when the ratchet wheel (5) is static, the two pawls (22) do not influence the rotation of the sleeve (3) along the anticlockwise direction;

the wheelchair comprises a flat car (9) and a chair (12);

the flat car (9) consists of a flat plate (10), a step wheel (11) and a wheel shaft (21);

the flat plate (10) is a horizontal rectangular plate, and the longitudinal length of the flat plate is greater than the transverse width of the flat plate;

two wheel shafts (21) which are transversely and fixedly connected to the flat plate (10) in tandem respectively, and two ends of each wheel shaft extend outwards from two sides of the flat plate (10) towards the surface;

the step wheel (11) is formed by combining a side wheel (11a) and a track wheel (11b) into a coaxial whole, the outer diameter of the side wheel (11a) is larger than that of the track wheel (11b), and the side wheel (11a) is positioned on the outer side of the track wheel (11 b); four step wheels (11) are arranged on the flat plate (10), two step wheels (11) of the four step wheels (11) are respectively sleeved on two extending ends of a front wheel shaft (21) of the flat plate (10), the other two step wheels (11) are respectively sleeved on two extending ends of a rear wheel shaft (21) of the flat plate (10), and the four step wheels (11) can freely rotate on a vertical plane around respective axes but cannot move along the axial direction;

n flat cars (9) are respectively placed on n pairs of disc grooves (1b) of the rotary disc (2); among the four step wheels (11) on each flat car (9), the side wheels (11a) on the two step wheels (11) positioned on the same side are inserted into the disc grooves (1b) on the corresponding sides of the corresponding pair of disc grooves (1b), the side wheels (11a) on the other two step wheels (11) positioned on the other side are inserted into the disc grooves (1b) on the other sides of the pair of disc grooves (1b), the rail wheels (11b) on the four step wheels (11) are in movable contact with the upper surface of the rotary disc (2) at corresponding positions, and when the rail wheels (11b) on the four step wheels (11) roll along the same direction of the upper surface of the rotary disc (2), the flat car (9) can only move along the radial direction and cannot move along the tangential direction relative to the rotary disc (2);

the chair (12) is provided with a safety belt (13), one side of the chair is hung with a ball frame, and a plurality of soft balls are placed in the ball frame;

the n chairs (12) are respectively and fixedly connected to the flat plates (10) of the n flat cars (9), and when n players respectively sit on the n chairs (12), the n players all face the upright posts (1);

the traction device comprises a rope (16) and a spring (17);

one end of each of n ropes is fixedly connected with the outer circumferential surface of the outer ring of the auxiliary bearing (14) positioned at the upper end of the upright post (1) at the corresponding position, and the other end of each rope extends to the n chairs (12) along the radial direction and is placed in the corresponding ball frame for later use;

one end of each of n springs (17) is fixedly connected with the outer circumferential surface of the outer ring of the auxiliary bearing (14) close to the sleeve (3) at the corresponding position, and the other end of each spring extends to the n flat cars (9) along the radial direction and is movably hooked with the front ends of the flat plates (10) on the n flat cars (9);

the power transmission system comprises a motor, an output wheel and a belt;

the output wheel is fixedly sleeved on an output shaft of the motor;

the belt is sleeved on the output wheel and a ratchet wheel (5) of the intermittent driving device;

looking up at the intermittent driving device, when the motor works, the ratchet wheel (5) is driven to rotate along the anticlockwise direction through the belt transmission, the ratchet wheel (5) pushes two pawls (22) on the sleeve (3) through ratchet wheel teeth (5a) on the ratchet wheel, so that the sleeve (3) synchronously rotates along the anticlockwise direction, and the sleeve (3) drives the rotary table (2) to synchronously rotate along the anticlockwise direction; when the motor stops working, the two pawls (22) do not block the counterclockwise rotation of the sleeve (3), so that the rotating disc (2) is connected to enable the sleeve (3) to continue to rotate in the counterclockwise direction due to inertia; the rotary plate (2) has larger moment of inertia, so that the rotary plate (2) has larger rotary kinetic energy and small frictional resistance, and the rotary plate (2) can rotate for a longer time according to the law of energy conservation, so that n players sitting on n chairs (12) respectively have enough time to play the amusement activities.

2. The amusement turntable of claim 1, wherein:

the amusement turntable can enable children and teenagers to obtain a plurality of physical perceptual knowledge in amusement, stimulate the desire to learn, cultivate physical interest and improve the enthusiasm of exploration;

after n players respectively sit on n chairs (12), the safety belts (13) are firmly tied, and then the players start to play; the following physical and sensory recognition can be obtained in the game:

firstly, a spring (17) is separated from a corresponding flat car (9), a player on the flat car (9) pulls a corresponding rope (16) by hands to keep the position of the flat car (9) relative to a rotating disc (2) unchanged, then a motor drives the rotating disc (2) to rotate at a slow acceleration speed, and the player feels that the force of pulling the rope (16) is gradually increased; when the rotating speed of the turntable (2) is constant, the player is connected to enable the flat car (9) to be slowly far away from the upright post (1), and the force for pulling the rope (16) is larger;

the amusement player obtains the perceptual knowledge of Newton's third law through the in-person feeling, obtains the perceptual knowledge of centripetal force, obtains the perceptual knowledge that the centripetal force increases along with the increase of the angular velocity under the condition that the radius of the circular motion is not changed and the quality is not changed, and obtains the perceptual knowledge that the centripetal force increases along with the increase of the radius of the circular motion under the condition that the angular velocity is not changed and the quality is not changed;

secondly, the rope (16) is idle, the spring (17) is hooked with the corresponding flat car (9), and the motor drives the turntable (2) to rotate slowly and acceleratively; only when the flat car (9) is gradually separated from the upright post (1), the spring (17) is gradually extended;

the amusement player obtains the perceptual knowledge that the spring (17) can provide centripetal force through the in-person feeling, and obtains the perceptual knowledge that the elastic force of the spring (17) is increased along with the increase of the elongation;

thirdly, the rope (16) is idle, the spring (17) is hooked with the corresponding flat car (9), after the motor drives the turntable (2) to rotate, the back of the person on the upper stream of the flat car (9) is tightly pressed on the back plate of the corresponding chair (12), and the upper body is difficult to tilt forwards; the higher the rotating speed of the turntable (2), the more difficult the upper body is to tilt forwards; if the user wants to lean forward, the user needs to pull the chair (12) backwards with hand force, which is different from the situation of sitting on a stool at home;

the amusement persons obtain the perceptual knowledge that the circumferential motion of any object (such as the above object) needs centripetal force through the in-person feeling, obtain the perceptual knowledge that various methods provide the centripetal force, and obtain the perceptual knowledge of Newton's third law;

fourthly, n ropes (16) are idle, n springs (17) are respectively hooked with n flatbeds (9), and the motor drives the turntable (2) to rotate at a constant rotating speed; when the n flatbeds (9) are kept relatively still relative to the rotating disc (2), some players are farthest away from the upright post (1), and some players are nearest to the upright post (1); observing that the player farthest from the upright (1) is a fat player or a tall player, and the player closest to the upright (1) is a lean player or a short player;

the amusement person obtains a perceptual knowledge that the larger the mass of the object is, the larger the centripetal force is, the larger the object mass is, the circular motion object is made by the personal feeling;

fifthly, the rope (16) is idle, the spring (17) is hooked with the corresponding flat car (9), and the motor drives the turntable (2) to rotate at a constant rotating speed; the player on the upper stream of the flat car (9) throws the soft ball vertically, but the thrown soft ball does not fall back into the hand, but flies away to the left of the throwing point, which is different from the situation of throwing the soft ball standing on the ground;

the amusement player obtains the perceptual knowledge of inertia and the perceptual knowledge that the speed direction of the circular motion object is the tangential direction through the in-person feeling;

sixthly, the rope (16) is idle, the spring (17) is hooked with the corresponding flat car (9), and the motor drives the turntable (2) to rotate at a constant rotating speed; the player on the upper stream of the flat car (9) throws the soft balls horizontally to the left side and the right side at the same hand-out speed respectively, and the player finds that the soft balls thrown to the left side fly far and the soft balls thrown to the right side fly near;

the player obtains perceptual knowledge of the sub-speed and the resultant speed through personal feeling, and obtains perceptual knowledge of speed synthesis on the same straight line;

seventhly, two ropes (16) which are symmetrical to each other are idle, two springs (17) which are symmetrical to each other are respectively hooked with the corresponding flat car (9), and the motor drives the turntable (2) to rotate at a constant rotating speed; two mutually symmetrical amusement players mutually transmit soft balls, the soft balls cannot be transmitted to the other player according to a ball transmission mode on the ground, and a rough method is finally realized through continuous exploration;

the player obtains the perceptual knowledge of the synthesis of two speeds forming angles with each other through the personal feeling;

eighthly, n springs (17) are respectively hooked with n flat cars (9), the motor stops working, when the turntable (2) rotates, n players pull respective ropes (16) simultaneously, the n flat cars (9) approach the upright post (1), unexpected conditions occur, and the rotating speed of the turntable (2) is accelerated;

the amusement player obtains the perceptual knowledge of the rotational inertia through the personal feeling, and obtains the perceptual knowledge of the conservation of the angular momentum of the system under the condition that the resultant external force moment of the system is zero or can be ignored;

the amusement turntable enables children and teenagers participating in amusement to obtain a large amount of physical perceptual knowledge, and lays a good foundation for physical learning of the children and the teenagers in the future.