Large momentum conservation exhibition device

Abstract

The invention discloses a large momentum conservation exhibition device which is provided with a bottom plate and a top plate which are oppositely arranged in the gravity direction, the large momentum conservation exhibition device further comprises a plurality of steel balls, a plurality of sets of connecting ropes, a mechanical arm and a shifting piece, and the steel balls are sequentially arranged in the first direction in an attached mode; the plurality of groups of connecting ropes are in one-to-one correspondence with the plurality of steel balls and are connected with the corresponding steel balls and the top plate, so that the corresponding steel balls are hung between the top plate and the bottom plate; the mechanical arm is arranged on the side, facing the top plate, of the bottom plate, the mechanical arm is provided with a movable end, the movable end has the freedom degree of moving in a movement plane, and the movement plane is a plane formed by the first direction and the gravity direction; the shifting piece is arranged at the movable end of the mechanical arm and responds to the driving force of the mechanical arm to shift the steel ball to swing in the motion plane. According to the large momentum conservation exhibition device, large steel balls can be adopted for exhibition, numerous audiences in an exhibition hall can observe, emulate and understand more conveniently, and the science popularization effect is better.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of science popularization devices, and particularly relates to a large momentum conservation exhibition device. BACKGROUND

[0002] Science popularization exhibits are products for displaying science and popularizing scientific knowledge. Science popularization exhibits are scientific and lively, and can display scientific knowledge vividly and visually.

[0003] If a system is not subjected to external forces or the vector sum of the external forces acting on the system is zero, then the total momentum of the system remains unchanged, and this conclusion is called the law of conservation of momentum. The law of conservation of momentum is one of the most important and most universal conservation laws in nature, which applies to both macroscopic objects and microscopic particles, and to both low-speed moving objects and high-speed moving objects.

[0004] At present, in the field of science popularization device design and the field of teaching aid technology, there is no large science popularization device for demonstrating the law of conservation of momentum. Visitors in the exhibition hall can usually only understand the law of conservation of momentum through abstract documents and course lectures, and it is difficult to intuitively understand the law of conservation of momentum. SUMMARY

[0005] The main purpose of the present application is to provide a large momentum conservation exhibition device, which aims to solve the problem that there is no large science popularization device for demonstrating the law of conservation of momentum in the traditional scheme.

[0006] To achieve the above-mentioned purpose, the present application provides a large momentum conservation exhibition device, which has a bottom plate and a top plate arranged opposite in the direction of gravity. The large momentum conservation exhibition device further comprises a plurality of steel balls, a plurality of groups of connecting ropes, a mechanical arm and a poking piece. The plurality of steel balls are arranged in sequence with the first direction abutting against each other, and the first direction is parallel to the horizontal plane. A plurality of groups of connecting ropes correspond to the plurality of steel balls one by one and connect the corresponding steel balls and the top plate to hang the corresponding steel balls between the top plate and the bottom plate, wherein each steel ball naturally hangs down. The mechanical arm is arranged on the side of the bottom plate facing the top plate, and the mechanical arm has a movable end with a degree of freedom of movement in the movement plane, and the movement plane is the plane formed by the first direction and the direction of gravity. The poking piece is arranged on the movable end of the mechanical arm, and the poking piece swings the steel ball in the movement plane in response to the driving force of the mechanical arm.

[0007] Optionally, the connecting rope comprises two steel wires, the two steel wires are oppositely arranged in a second direction, the second direction is perpendicular to the first direction and parallel to the horizontal plane, each of the steel wires is connected with the corresponding steel ball at one end and connected with the top plate at the other end; wherein, in the second direction, the distance between the two steel wires and the corresponding steel ball at one end is a, the distance between the two steel wires and the top plate at one end is b, and a < b.

[0008] Optionally, the angle between the two steel wires is c, and 40° ≤ c ≤ 60°.

[0009] Optionally, the large momentum conservation exhibition device further comprises a connecting assembly for connecting the steel wire and the steel ball, the connecting assembly comprises a lifting ring and a lifting hook matched with each other, any one of the lifting ring and the lifting hook is arranged on the steel ball, and the other one of the lifting ring and the lifting hook is arranged at the end of the steel wire.

[0010] Optionally, the push piece is in U shape and has a closed end and an open end, the closed end of the push piece is connected with the mechanical arm, and the push piece is symmetrical on both sides of the movement plane; wherein, when the push piece is pushed between two adjacent steel balls, the open end of the push piece avoids the contact area of the adjacent steel balls.

[0011] Optionally, in the first direction, the mechanical arm is arranged on one side of the steel ball; the large momentum conservation exhibition device further comprises a soft pad arranged on one side of the push piece, and when the push piece is located on one side of each steel ball in the first direction, the soft pad is located on the side of the push piece away from each steel ball.

[0012] Optionally, the large momentum conservation exhibition device further comprises an outer wall arranged around the gravity direction and connected with the bottom plate, the outer wall is a high-transmittance material; wherein, the steel ball and the mechanical arm are located in the space surrounded by the outer wall and the bottom plate.

[0013] Optionally, the large momentum conservation exhibition device further comprises a top frame body and two connecting pipes, the top frame body is fixed with the top plate; the two connecting pipes are arranged on the top frame body, the two connecting pipes are arranged in the second direction and axially parallel to the first direction; wherein, the two steel wires connected with the same steel ball are respectively connected with a connecting pipe, and the connection positions are opposite in the second direction.

[0014] Optionally, the large momentum conservation exhibition device further comprises a control console electrically connected with the mechanical arm.

[0015] Optionally, the steel ball has seven.

[0016] The large momentum conservation exhibition device provided by the embodiment of the application is used. The mechanical arm drives the poking piece to move in the movement plane, so that the poking piece pokes up the steel ball. Then the mechanical arm drives the poking piece to retract. The poked-up steel ball falls and hits other steel balls, so as to display the momentum conservation. The mechanical arm drives the poking piece to move to poke the steel ball. Therefore, large steel balls can be used for exhibition, which is more convenient for many visitors in the exhibition hall to observe and understand, and the popular science effect is better. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the prior art and the application, the drawings needed in the description of the prior art and the embodiment of the application will be briefly introduced. Obviously, the drawings in the following description are only exemplary. For those skilled in the art, other drawings can be derived from the provided drawings without creative labor.

[0018] The structures, proportions, sizes and the like shown in the specification are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the limiting conditions of the implementation of the application. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effect and purpose that can be achieved by the application, should still fall within the scope of the technical content disclosed by the application.

[0019] Figure 1 The overall structure of the large momentum conservation exhibition device provided by the embodiment of the application is shown in the figure Figure 1 ; Figure 2 The structure of another view of the embodiment in the figure is shown Figure 1 Figure 3 The structure of another view of the embodiment in the figure is shown Figure 1 The overall structure of the large momentum conservation exhibition device provided by the embodiment of the application is shown in the figure Figure 4 Figure 2 The structure of the top frame body of the embodiment of the application is shown in the figure Figure 5 The structure of the operating rod of the embodiment of the application is shown in the figure. Figure 6 The structure of the operating rod of the embodiment of the application is shown in the figure.

[0020] In the figure: 1, steel ball; 2, steel wire rope; 3, mechanical arm; 4, poking piece; 5, outer wall; 61, top frame body; 62, connecting pipe; 7, control console.

[0021] ​​The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 Schematic diagram of the overall structure of a large momentum conservation exhibition device proposed in this application embodiment Figure 1 ; Figure 2 forFigure 1 Structural schematic diagram of another perspective of the embodiment; Figure 3 As Figure 1 Structural schematic diagram of still another perspective of the embodiment; Figure 4 Structural schematic diagram of the whole large momentum conservation exhibition device Figure 2 ; Figure 5 Structural schematic diagram of the top frame body of the embodiment.

[0028] With reference to Figures 1 to 5 , the embodiment of the present application provides a large momentum conservation exhibition device, which has a bottom plate and a top plate arranged oppositely in the direction of gravity. The large momentum conservation exhibition device can further include a plurality of steel balls 1, a plurality of groups of connecting ropes, a mechanical arm 3 and a poking piece 4. The plurality of steel balls 1 are arranged in sequence with the first direction abutting against each other, and the first direction is parallel to the horizontal plane. The plurality of groups of connecting ropes correspond to the plurality of steel balls 1 one by one and connect the corresponding steel balls 1 and the top plate, so as to hang the corresponding steel balls 1 between the top plate and the bottom plate, wherein each steel ball 1 naturally droops. The mechanical arm 3 is arranged on the side of the bottom plate facing the top plate, and the mechanical arm 3 has a movable end with a degree of freedom of movement in the movement plane, and the movement plane is the plane formed by the first direction and the direction of gravity. The poking piece 4 is arranged on the movable end of the mechanical arm 3, and the poking piece 4 swings the steel ball 1 in the movement plane in response to the driving force of the mechanical arm 3.

[0029] The large momentum conservation exhibition device proposed in the embodiment of the present application, when in use, drives the poking piece 4 to move in the movement plane through the mechanical arm 3, so that the poking piece 4 pokes up the steel ball 1, and then the mechanical arm 3 drives the poking piece 4 to retract, and the poked-up steel ball 1 falls and hits other steel balls 1, so as to demonstrate the law of conservation of momentum. By driving the poking piece 4 to move through the mechanical arm 3 to poke the steel ball 1, a larger steel ball 1 can be used for exhibition, which is more convenient for a large number of visitors in the exhibition hall to observe and understand, and the popular science effect is better.

[0030] It should be noted that, taking the state of the steel ball 1 shown in Figure 2 as an example, the steel ball 1 can be two left and right, when the left steel ball 1 is poked up, the left steel ball 1 falls and swings to hit the right steel ball 1 in a stationary state, so that the left steel ball 1 stops swinging, and the right steel ball 1 is hit up and starts to swing, so as to circulate and demonstrate the law of conservation of momentum, until the energy loss caused by air resistance, friction and other factors makes all the steel balls 1 stop moving.

[0031] For example, also taking the state of the steel ball 1 shown in Figure 2 as an example, when the steel ball 1 is three, the leftmost steel ball 1 will hit the middle steel ball 1 when it is poked, so that the rightmost steel ball 1 starts to swing.

[0032] The steel ball 1 is a hollow circular ball made of stainless steel with a diameter of 200 mm and a thickness of 8 mm. The mechanical arm 3 can be an imported ABB industrial robot IRB2400 with a maximum load of 20 kg, high grabbing precision, high power, stable performance, and other characteristics. The mechanical arm 3 can also be a new Song robot SR20A.

[0033] As shown in Figure 1 , the first direction is the X direction, parallel to the horizontal plane, and the first direction is also the direction of the center line of the plurality of steel balls 1.

[0034] It should be understood that the plurality of steel balls 1 are arranged in sequence in the first direction, and each steel ball 1 naturally droops, that is, there is no interaction between adjacent steel balls 1.

[0035] In addition, as shown in Figure 2 , the mechanical arm 3 should be below the steel ball 1 in the direction of gravity, as shown in Figure 3 , the mechanical arm 3 and the steel ball 1 are both in the first direction, that is, "coaxial", which facilitates the mechanical arm 3 driving the push piece 4 to swing the steel ball 1 in the movement plane.

[0036] It should be noted that the top plate and the bottom plate should be understood as a relative concept. The bottom plate is mainly used to support the mechanical arm 3, and the top plate is used to suspend the steel ball 1. In actual use, the floor of the exhibition hall can be used as the bottom plate, and the ceiling of the exhibition hall can be used as the top plate. Of course, a separate plate can also be provided on the floor of the exhibition hall as the bottom plate. That is, the plate used to support the mechanical arm 3 can be regarded as the bottom plate, and the plate used to suspend the steel ball 1 can be regarded as the top plate.

[0037] Referring to Figure 1 and Figure 3 , in an exemplary embodiment, the connecting rope can include two steel wires 2, which are oppositely arranged in the second direction, which is perpendicular to the first direction and parallel to the horizontal plane. Each steel wire 2 is connected to the corresponding steel ball 1 at one end and to the top plate at the other end. In the second direction, the distance between the two ends of the two steel wires 2 connected to the corresponding steel ball 1 is a, and the distance between the two ends of the two steel wires 2 connected to the top plate is b, and a < b.

[0038] Specifically, as shown in Figure 1 and Figure 3As shown, the distance between the end of the two steel wires 2 connected with the corresponding steel ball 1 is a, the distance between the end of the two steel wires 2 connected with the top plate is b, and a < b; in other words, taking one steel ball 1 as an example, the two steel wires 2 connected with the steel ball 1 are arranged at an angle; thus when the steel ball 1 has a tendency to swing in the second direction, it will always be subjected to the counteracting force applied to the steel ball 1 by one of the two steel wires 2 to prevent the steel ball 1 from swinging in the second direction, thereby further enabling the steel ball 1 to swing only in the movement plane, ensuring the accuracy of the momentum conservation demonstration.

[0039] In the present embodiment, the diameter of the steel wire 2 can be 2 mm to ensure the stability of the connection.

[0040] It should be understood that, as Figure 3 shown, the connection areas of the two steel wires 2 with the corresponding steel ball 1 are different, and the connection areas are opposite in the second direction.

[0041] In addition, when the steel ball 1 can only swing in the movement plane, the mechanical arm 3 can move more steel balls 1 at one time to demonstrate the momentum conservation.

[0042] In the exemplary embodiment, as Figure 2 shown, the steel balls 1 are seven, and for the sake of illustration, the left and right numbers will be used to represent the steel balls 1 hereinafter, for example, left three represents Figure 2 the three leftmost steel balls 1; if the mechanical arm 3 moves left one, then left one and right one swing in a cycle; if the mechanical arm 3 moves left two, then left two and right two swing in a cycle; if the mechanical arm 3 moves left three, then left three and right three swing in a cycle; if the mechanical arm 3 moves left four, then the middle steel ball 1 will swing with left three and right three, that is, right four swings after the middle steel ball 1 is hit by left four and falls on right three.

[0043] In the exemplary embodiment, the angle between the two steel wires 2 is c, and 40° ≤ c ≤ 60°, and specifically c can be 40°, 45°, 50°, 55°, 60°, etc.; the larger the value of c, the better the effect of preventing the steel ball 1 from swinging in the second direction, but the smaller the amplitude of the steel ball 1 swinging in the first direction, and the larger the space occupied by the steel wire 2, and in the preferred embodiment.

[0044] In the exemplary embodiment, the large-scale momentum conservation exhibition device can further comprise a connecting assembly to connect the steel wire 2 with the steel ball 1, and the connecting assembly can comprise a lifting ring and a lifting hook that cooperate with each other, either of the two is arranged on the steel ball 1, and the other is arranged at the end of the steel wire 2.

[0045] Specifically, the quick disassembly, replacement and use of the steel ball 1 can be realized by the matched lifting ring and hook, and the matched lifting ring and hook have many existing components, which will not be described here.

[0046] Reference Figure 1 With Figure 4 In the example embodiment, the toggle piece 4 is in U shape and has a closed end and an open end, the closed end of the toggle piece 4 is connected with the mechanical arm 3, and the toggle piece 4 is symmetrical on both sides of the movement plane; wherein, when the toggle piece 4 is toggled between the adjacent two steel balls 1, the open end of the toggle piece 4 avoids the contact area of the adjacent steel balls 1.

[0047] In the example embodiment, the toggle piece 4 is in U shape and has a closed end and an open end, the closed end of the toggle piece 4 is connected with the mechanical arm 3, and the toggle piece 4 is symmetrical on both sides of the movement plane; wherein, when the toggle piece 4 is toggled between the adjacent two steel balls 1, the open end of the toggle piece 4 avoids the contact area of the adjacent steel balls 1.

[0048] In addition, the toggle piece 4 is symmetrical on both sides of the movement plane, that is, the two sheet structures at the open end of the toggle piece 4 simultaneously contact and push the steel ball 1 to move, which further ensures that the steel ball 1 will not swing in the second direction.

[0049] Reference Figure 2 In the example embodiment, in the first direction, the mechanical arm 3 is arranged on one side of the steel ball 1; the large momentum conservation exhibition device can further include a soft pad, the soft pad is arranged on one side of the toggle piece 4, and when the toggle piece 4 is located on one side of each steel ball 1 in the first direction, the soft pad is located on the side of the toggle piece 4 away from each steel ball 1.

[0050] Specifically, as shown in Figure 2 The mechanical arm 3 only needs to toggle the first to fourth steel balls 1 on the left or the first to fourth steel balls 1 on the right, that is, the various swing states of the seven steel balls 1 can be displayed, and for the convenience of the unilateral toggle of the mechanical arm 3, the mechanical arm 3 and the toggle piece 4 can be arranged on the left or right side of the multiple steel balls 1 in the first direction, so as to facilitate the toggle of the steel balls 1 by the mechanical arm 3 and the toggle piece 4.

[0051] Further, the soft pad is arranged on one side of the toggle piece 4, and when the toggle piece 4 is located on one side of each steel ball 1 in the first direction, the soft pad is located on the side of the toggle piece 4 away from each steel ball 1; for example, as shown in Figure 2As shown, if the mechanical arm 3 is arranged on the left side of the plurality of steel balls 1, the soft pad is arranged on the left side of the poking piece 4, so that when the poking piece 4 pokes the steel ball 1 to the left, the soft pad first contacts the steel ball 1, thereby protecting the steel ball 1, preventing scratches on the steel ball 1 due to the poking of the poking piece 4, affecting the aesthetic level of the steel ball 1, and thereby ensuring the exhibition effect.

[0052] Reference Figure 1 and 2 In an exemplary embodiment, the large momentum conservation exhibition device can further include an outer wall 5, the outer wall 5 is arranged around the gravity direction and connected with the bottom plate, the outer wall 5 is a high light transmission material; wherein the steel ball 1 and the mechanical arm 3 are located in the space surrounded by the outer wall 5 and the bottom plate.

[0053] Specifically, the outer wall 5 can be tempered glass, such as Figure 1 As shown, the steel ball 1 and the mechanical arm 3 are located in the space surrounded by the outer wall 5 and the bottom plate.

[0054] In the embodiment of the present application, the bottom plate is not a floor, but a separate plate arranged on the floor, so when installing the glass, a frame can be welded first, the bottom plate is connected to the bottom of the frame, and the glass is connected to the side of the frame.

[0055] Wherein, the frame size can be 5500mm long, 1500mm wide, and 2400mm high, and is welded by square tubes, the bottom plate is made of 15mm thick anti-beetle plate, and the glass is made of 10mm thick tempered glass.

[0056] Reference Figure 4 and Figure 5 In an exemplary embodiment, the large momentum conservation exhibition device can further include a top frame body 61 and two connecting pipes 62, the top frame body 61 is fixed with the top plate; the two connecting pipes 62 are arranged on the top frame body 61, and the two connecting pipes 62 are arranged in the second direction and axially parallel to the first direction; wherein the two steel wires 2 connected with the same steel ball 1 are respectively connected with a connecting pipe 62, and the connection positions are opposite in the second direction.

[0057] Specifically, the steel ball 1 swings around the connection area of the steel wire 2 and the connecting pipe 62, such as Figure 4 and Figure 5 As shown, the two connecting pipes 62 are axially parallel to the first direction, and the two steel wires 2 connected with the same steel ball 1 are respectively connected with a connecting pipe 62, and the connection positions are opposite in the second direction, so as to ensure that the arrangement of each steel ball 1 and the corresponding connecting rope is consistent, that is, the consistency of the swing of each steel ball 1 is high.

[0058] The top frame body 61 refers to other pipes not connected with the steel wire rope 2, and the top frame body 61 and the connecting pipe 62 are both square pipe structures and are welded with each other, and the top frame body 61 can be connected with the top plate through bolts.

[0059] It should be noted that the steel wire rope 2 and the connecting pipe 62 can also be connected through mutually matched hooks and lifting rings, and one of the hooks and the lifting rings is arranged on the connecting pipe 62, and the other of the hooks and the lifting rings is arranged at the end of the steel wire rope 2.

[0060] Reference Figure 1 In the example embodiment, the large momentum conservation exhibition device can further include a control console 7 electrically connected with the mechanical arm 3.

[0061] Specifically, the control console 7 can be arranged on the outer periphery of the outer wall 5, and an operator can control the mechanical arm 3 to move the steel balls 1 for display through the control console 7.

[0062] Among them, the control console 7 can be provided with labels to record related graphic instructions of the law of conservation of momentum, in addition, as shown in the state Figure 2 , the control console 7 is located at the middle position of the large momentum conservation exhibition device in the first direction, so as to facilitate observation.

[0063] Specifically, as shown in Figure 1 and Figure 2 , the control console 7 can be composed of a bottom cabinet, a table top, an operating rod and a start button, and the table top is made of 12mm artificial stone material; the operating rod on the table top has a plurality of operating rods, wherein the plurality of operating rods can be divided into a fixed operating rod part and a movable operating rod part arranged in the first direction in sequence, and the operating rod in the movable operating rod part can move along the first direction, so as to Figure 2 , the mechanical arm 3 is located on the left side of the plurality of steel balls 1, and the steel balls 1 have seven as an example for description, at this time, the operating rod also has seven, the four operating rods located on the leftmost side have the freedom of sliding along the first direction, and the overall sliding range to the left is the position occupied by one operating rod, and when the seven operating rods are arranged closely, the position is the initial position, as shown in Figure 2 , at this time, the seven operating rods can be divided into two parts, one part close to the left side contains three operating rods, and one part close to the right side contains four operating rods, which is equivalent to sliding the three operating rods close to the left side to the left under the initial position; then at this time, the start button is pressed, and the mechanical arm 3 will move the three steel balls 1 on the leftmost side to swing, that is, the number of steel balls 1 moved by the mechanical arm 3 is the same as the number of operating rods close to the left side when the start button is pressed.

[0064] It should be understood that if the seven operating rods are arranged closely as one whole, then at this time, the start button is pressed, and the mechanical arm 3 does not move.

[0065] As shown in Figure 6 , that is, seven operating rods, the four operating rods on the left side can slide to the left by one operating rod position; wherein the arrows represent the light signals of the photoelectric sensors; that is, four photoelectric sensors can be installed on the console 7, and the light signals of the photoelectric sensors are all blocked by the four slidable operating rods in the initial position, as shown in Figure 6 , the four photoelectric sensors can be numbered as No. 1 sensor to No. 4 sensor from left to right; wherein, if three operating rods are pulled to the left from the initial position (i.e. the operating rod position shown in Figure 6 ), the light signal of No. 3 sensor is not blocked at this time, then the start button is pressed at this time, and the controller can control the mechanical arm 3 to pull the three steel balls 1 on the left side to swing based on the signal of No. 3 sensor; similarly, if one operating rod is pulled back to the initial position on the basis of pulling three operating rods, it is equivalent to pulling two operating rods to the left from the initial position at this time, then the light signal of No. 2 sensor is not blocked at this time, the start button is pressed, and the controller can control the mechanical arm 3 to pull the two steel balls 1 on the left side to swing based on the signal of No. 2 sensor.

[0066] It should be understood that the number of photoelectric sensors is the same as the number of operating rods in the movable operating rod part and is set one-to-one.

[0067] Wherein, the controller is electrically connected with the start button, the mechanical arm 3 and each photoelectric sensor; in addition, taking the four slidable operating rods in the above seven operating rods and the four photoelectric sensors as an example, the controller should be pre-set with four signals corresponding to the signals sent to the mechanical arm 3 to control the mechanical arm 3 to pull one to four steel balls 1; wherein, the signal for controlling the mechanical arm 3 to pull one steel ball 1 corresponds to No. 1 sensor, and the rest are the same.

[0068] The above is only a preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the contents of the specification and drawings, or direct or indirect application in other related technical fields, are all included in the patent protection scope of the present application.

Claims

1. A large momentum conservation exhibition device, characterized in that: The large-scale momentum conservation exhibition device comprises a bottom plate and a top plate arranged opposite to each other in the direction of gravity, and further comprises: A plurality of steel balls (1) are arranged in sequence in a close relationship in a first direction, wherein the first direction is parallel to a horizontal plane; A plurality of connecting ropes corresponding to the plurality of steel balls (1) and connecting the corresponding steel balls (1) and the top plate so as to suspend the corresponding steel balls (1) between the top plate and the bottom plate, wherein each of the steel balls (1) droops naturally; A mechanical arm (3) is arranged on a side of the bottom plate facing the top plate, the mechanical arm (3) having a movable end, the movable end having a degree of freedom to move within a motion plane, the motion plane being a plane formed by the first direction and the direction of gravity; A paddle (4) is provided at the movable end of the mechanical arm (3), and the paddle (4) paddles the steel ball (1) to swing within the motion plane in response to the driving force of the mechanical arm (3).

2. The large-scale momentum conservation exhibition device according to claim 1, characterized in that: The connecting rope comprises two steel wire ropes (2), the two steel wire ropes (2) are arranged opposite to each other in a second direction, the second direction is perpendicular to the first direction and parallel to the horizontal plane, and each of the steel wire ropes (2) is connected to the corresponding steel ball (1) at one end and to the top plate at the other end; Wherein, in the second direction, the distance between the ends of the two steel wire ropes (2) connected to the corresponding steel balls (1) is a, the distance between the ends of the two steel wire ropes (2) connected to the top plate is b, and a<b.

3. The large-scale momentum conservation exhibition device according to claim 2, characterized in that: The angle between the two steel wire ropes (2) is c, and 40°≤c≤60°.

4. The large-scale momentum conservation exhibition device according to claim 2, characterized in that: The large-scale momentum conservation exhibition device further comprises a connecting assembly for connecting the steel wire rope (2) and the steel ball (1), wherein the connecting assembly comprises a lifting ring and a lifting hook that cooperate with each other, wherein either the lifting ring or the lifting hook is arranged on the steel ball (1), and the other of the lifting ring and the lifting hook is arranged at the end of the steel wire rope (2).

5. The large-scale momentum conservation exhibition device according to claim 1, characterized in that: The toggle piece (4) is U-shaped and has a closed end and an open end. The closed end of the toggle piece (4) is connected to the mechanical arm (3). The toggle piece (4) is symmetrical on both sides of the motion plane. When the paddle (4) is paddled between two adjacent steel balls (1), the open end of the paddle (4) avoids the contact area of ​​the adjacent steel balls (1).

6. The large-scale momentum conservation exhibition device according to claim 5, characterized in that: In the first direction, the mechanical arm (3) is arranged on one side of the steel ball (1); the large-scale momentum conservation exhibition device further comprises: A soft pad is provided on one side of the toggle piece (4), and when the toggle piece (4) is located on one side of each of the steel balls (1) in the first direction, the soft pad is located on the side of the toggle piece (4) facing away from each of the steel balls (1).

7. The large-scale momentum conservation exhibition device according to claim 1, characterized in that: The large-scale momentum conservation exhibition device also includes: An outer wall (5) is arranged around the direction of gravity and connected to the bottom plate, and the outer wall (5) is made of a highly light-transmitting material; The steel ball (1) and the robotic arm (3) are both located in a space enclosed by the outer wall (5) and the bottom plate.

8. The large-scale momentum conservation exhibition device according to claim 2, characterized in that: The large-scale momentum conservation exhibition device also includes: A top frame body (61) is fixed to the top plate; Two connecting pipes (62) are both arranged on the top frame body (61), and the two connecting pipes (62) are spaced apart in the second direction and their axial directions are both parallel to the first direction; The two steel wire ropes (2) connected to the same steel ball (1) are respectively connected to one connecting pipe (62), and the connection positions are opposite in the second direction.

9. The large-scale momentum conservation exhibition device according to claim 1, characterized in that: The large-scale momentum conservation exhibition device also includes: The control console (7) is electrically connected to the robotic arm (3).

10. The large-scale momentum conservation exhibition device according to claim 1, characterized in that: There are seven steel balls (1).

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