Novel three-line pendulum experiment instrument

Abstract

The utility model discloses a novel three-line pendulum experiment instrument, which belongs to the technical field of experiment instruments and comprises a frame body assembly, an installation assembly is fixedly installed at the upper end of the frame body assembly and comprises an installation plate, one end of the installation plate is fixed on the frame body assembly, and an upper disc is rotatably installed at the other end of the installation plate. Three adjusting shafts are rotationally installed on the upper disc in a circumferential array mode, stay wires are fixedly installed on the adjusting shafts in a winding mode, a lower disc assembly with the adjustable size is fixedly installed between the lower ends of the stay wires, the lower disc assembly comprises a disc body, and an adjusting disc is rotationally installed in the middle of the interior of the disc body; the outer side of the disc body is slidably clamped with the expansion sheets in a circumferential array, through the adjusting disc and the expansion sheets, the extension length of the expansion sheets can be conveniently adjusted according to the size of a to-be-measured object during use, the applicability is high, and through the split type design, the frame body assembly and the mounting assembly can be conveniently disassembled, and carrying, storage and use are convenient.

Description

Technical Field

[0001] The utility model relates to a novel three-wire pendulum experimental instrument, belonging to the technical field of experimental instruments. Background Art

[0002] In university physics experiments, the three-wire pendulum experiment is a common method to measure the moment of inertia of an object. It is mainly used to study the motion laws of objects under force, especially the motion laws of dynamics and statics. The principle is to use two identical simple harmonic vibrations to make a particle perform circular motion under a state of force balance on the line. When conducting the experiment, a three-wire pendulum tester is needed.

[0003] For example, a three-wire pendulum experimental instrument disclosed in the Chinese utility model patent with announcement number: CN207663632U includes a bracket and a three-wire pendulum. The three-wire pendulum is composed of an upper disc, a lower disc and three suspension wires of equal length connecting the upper disc and the lower disc; the base is connected to the upper bracket through three vertical rods, and the rotation axis of the upper disc is vertically fixed on the crossbeam of the upper bracket to make the device stable; the center position of the upper bracket is connected to the winding shaft and the top wire through a connecting shaft; one end of the suspension wire is connected to the winding shaft, and the other end is connected to the lower disc, which is convenient for adjusting the pendulum length of the three-wire pendulum and avoiding shaking during the swing of the three-wire pendulum. A fixed pointer is installed on the base, and a circular angle scale bar is engraved on the circumference of the lower disc. The angle is marked from 0 to 360 degrees with an accuracy of 0.1 degrees. The pointer and the scale bar scale lines are adjusted to be parallel to each other. When the lower disc is rotated, the angle value of the pointer passing through the scale can be observed, and the rotation angle can be accurately controlled to be less than 5 degrees.

[0004] However, when in use, the chassis of the traditional three-wire pendulum tester is of a fixed shape and is only suitable for objects of specific shapes and sizes. When objects of different shapes and sizes need to be measured, the experimenter often needs to manually replace the chassis or adjust the experimental device, which not only increases the complexity and time cost of the experiment, but also easily leads to measurement errors, affecting the accuracy of the experimental results. In addition, when not in use, the overall size is large, which makes it inconvenient to carry and store. Utility Model Content

[0005] The purpose of the utility model is to provide a novel three-wire pendulum tester to solve the above problems, which can conveniently adjust the size of the chassis according to the size of the object to be tested and is easy to carry and store when not in use.

[0006] The present utility model realizes the above object through the following technical solutions. A new type of three-wire pendulum experiment instrument includes a frame assembly. An installation assembly is fixedly installed at the upper end of the frame assembly. The installation assembly includes an installation plate. One end of the installation plate is fixed on the frame assembly, and the other end of the installation plate is rotatably installed with an upper disk. Three adjusting shafts are rotatably installed on the upper disk in a circumferential array. A stay wire is wound and fixedly installed on the adjusting shaft. A lower disk assembly with adjustable size is fixedly installed between the lower ends of the stay wires.

[0007] Preferably, in order to facilitate placement and adjust the levelness of the upper disk, the frame assembly includes a placement rack with adjustable placement foot height, and the placement rack is of a V-shaped structure. An expansion rod is fixedly installed above one end of the placement rack. The upper end of the expansion rod is fixedly installed with a connection head. One end of the installation plate is fixedly installed on the connection head.

[0008] Preferably, in order to facilitate the installation of the installation assembly, a blind hole with a square structure is provided at the upper end of the connection head. A plug with a square structure is fixedly installed at one end of the installation plate. A connection bolt is vertically threadedly connected to the plug, and one end of the connection bolt is threadedly connected to the lower end inside the blind hole.

[0009] Preferably, in order to facilitate data collection of the size of an object and adjust the size of the lower disk assembly, a collection module is fixedly installed at the middle position of the lower surface of the upper disk. The collection module uses a ccd camera. A processor is fixedly installed on the upper surface of the installation plate, and the processor is wirelessly signal-connected to the lower disk assembly.

[0010] Preferably, in order to facilitate size adjustment, the lower disk assembly includes a disk body. An adjusting disk is rotatably installed at the middle position inside the disk body. Expansion pieces are slidably clamped in a circumferential array on the outer side of the disk body. The stay wire is fixedly installed at the upper end of one side of the expansion piece. The adjusting disk is clamped with the expansion piece.

[0011] Preferably, in order to facilitate the movement of the expansion piece, plugging holes are evenly provided on the outer side of the disk body. A chute is provided at the lower end inside the plugging hole. The expansion piece is plugged inside the plugging hole, and a slider that coincides with the chute is fixedly installed at the lower end of the expansion piece.

[0012] Preferably, in order to facilitate the installation of the adjusting disk, a groove is provided inside the disk body between the plugging holes. The adjusting disk is rotatably installed inside the groove. A driving motor with a storage battery is fixedly installed at the middle position of the lower end of the disk body. The output end of the driving motor is fixedly connected to the adjusting disk.

[0013] Preferably, in order to facilitate the adjustment disk to push the expansion piece, the adjustment disk is provided with arc holes in a circular array, and an insertion rod is fixedly installed on the lower side of one end of the expansion piece, and the insertion rod is inserted into the inside of the arc hole.

[0014] The beneficial effects of the utility model are as follows: through the adjustment disk and the expansion piece, when in use, it is convenient to adjust the extended length of the expansion piece according to the size of the object to be measured, and the applicability is strong. Through the split design, it is convenient to separate the frame component and the installation component, which is convenient to carry and store, and convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is a structural schematic diagram of the frame assembly in the utility model.

[0017] Figure 3 It is a structural schematic diagram of the installation position of components in the utility model.

[0018] Figure 4 It is a structural schematic diagram of the lower disc assembly in the utility model.

[0019] Figure 5 It is a partial structural diagram of the lower disc assembly in the utility model.

[0020] Figure 6 It is a schematic diagram of the structure of the lower disc assembly after explosion in the utility model.

[0021] Figure 7 It is a schematic structural diagram of the utility model after the middle plate body is cut open.

[0022] In the figure: 1. frame assembly; 101. placement rack; 102. telescopic rod; 103. connector; 104. blind hole; 2. installation assembly; 201. installation plate; 202. upper disc; 203. adjustment shaft; 204. plug-in block; 205. connecting bolt; 206. acquisition module; 207. processor; 3. pull wire; 4. lower disc assembly; 401. disc body; 402. adjustment disc; 403. expansion piece; 404. plug-in hole; 405. slide groove; 406. slider; 407. groove; 408. drive motor; 409. arc hole; 4010. plug-in rod. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figures 1 - 7 As shown, a new type of three-wire pendulum experiment instrument includes a frame assembly 1. An installation assembly 2 is fixedly installed at the upper end of the frame assembly 1. The installation assembly 2 includes an installation plate 201. One end of the installation plate 201 is fixed on the frame assembly 1, and the other end of the installation plate 201 is rotatably installed with an upper disc 202. Three adjusting shafts 203 are rotatably installed on the upper disc 202 in a circumferential array. A pulling wire 3 is fixedly installed around the adjusting shaft 203. A lower disc assembly 4 with an adjustable size is fixedly installed between the lower ends of the pulling wire 3. When in use, the installation assembly 2 is installed on the frame assembly 1, and the height of the frame assembly 1 is adjusted so that the lower disc assembly 4 is suspended by the pulling wire 3, and the levelness of the upper disc 202 is adjusted through the frame assembly 1. Then, the length of the pulling wire 3 is adjusted through the adjusting shaft 203 to adjust the levelness of the lower disc assembly 4. After the adjustment is completed, it is fixed. The object to be measured is placed on the lower disc assembly 4, and the size of the lower disc assembly 4 is adjusted according to the size of the object to be measured. It has strong applicability and is convenient to use. When carrying or storing, the installation assembly 2 and the frame assembly 1 are separated, and the height of the frame assembly 1 is adjusted to adjust the lower disc assembly 4 to the smallest state, which is convenient for carrying and storage.

[0025] As a technical optimization solution of the present utility model, as Figure 2 shown, the frame assembly 1 includes a placement rack 101 with adjustable placement foot height, and the placement rack 101 is of a V-shaped structure. An expansion rod 102 is fixedly installed above one end of the placement rack 101. The upper end of the expansion rod 102 is fixedly installed with a connection head 103. One end of the installation plate 201 is fixedly installed on the connection head 103. By adjusting the placement feet at the lower end of the placement rack 101, it is convenient to adjust the levelness of the upper disc 202, and through the expansion rod 102, it is convenient to adjust the height of the installation assembly 2, and through the connection head 103, it is convenient to install the installation assembly 2 on the frame assembly 1.

[0026] As a technical optimization solution of the present utility model, as Figure 3As shown, a blind hole 104 with a square structure starts from the upper end of the connector 103. One end of the mounting plate 201 is fixedly installed with an insert block 204 with a square structure. A connecting bolt 205 is vertically threadedly connected to the insert block 204, and one end of the connecting bolt 205 is threadedly connected to the lower end inside the blind hole 104. A collection module 206 is fixedly installed at the middle position of the lower surface of the upper disk 202. The collection module 206 uses a ccd camera. A processor 207 is fixedly installed on the upper surface of the mounting plate 201, and the processor 207 is wirelessly signal-connected to the lower disk assembly 4. Through the collection module 206, it is convenient to collect the size of the object to be measured. It is convenient to send an adjustment signal to the drive motor 408 through the processor 207, so that the lower disk assembly 4 is adjusted in size, with strong applicability. And through the insert block 204 and the blind hole 104, when connecting the mounting assembly 2 and the frame assembly 1, the insert block 204 is inserted into the inside of the blind hole 104, and the connecting bolt 205 is screwed, so that the connecting bolt 205 is threadedly connected to the connector 103, improving the firmness during assembly and facilitating installation.

[0027] As a technical optimization scheme of the present utility model, as Figures 4 to 7As shown in the figure, the lower disc assembly 4 includes a disc body 401. An adjusting disc 402 is rotatably installed at the middle position inside the disc body 401. And expansion pieces 403 are slidably clamped in a circumferential array on the outer side of the disc body 401. One end of the pull wire 3 is fixedly installed at the upper side of one side of the expansion piece 403. The adjusting disc 402 is clamped with the expansion piece 403. Insertion holes 404 are evenly formed on the outer side of the disc body 401. A chute 405 is formed at the lower end inside the insertion hole 404. The expansion piece 403 is inserted inside the insertion hole 404. And a slider 406 that coincides with the chute 405 is fixedly installed at the lower end of the expansion piece 403. Grooves 407 are formed inside the disc body 401 between the insertion holes 404. The adjusting disc 402 is rotatably installed inside the grooves 407. A driving motor 408 with a storage battery is fixedly installed at the middle position of the lower end of the disc body 401. The control chip of the driving motor 408 is wirelessly signal-connected to the processor 207 on the installation component 2. The output end of the driving motor 408 is fixedly connected to the adjusting disc 402. Arc-shaped holes 409 are formed in a circumferential array on the adjusting disc 402. And a plug rod 4010 is fixedly installed at the lower side of one end of the expansion piece 403. The plug rod 4010 is inserted inside the arc-shaped hole 409. When adjusting the size of the lower disc assembly 4, the driving motor 408 drives the adjusting disc 402 to rotate. When the adjusting disc 402 rotates, since one end of the expansion piece 403 is inserted inside the arc-shaped hole 409 on the adjusting disc 402 through the plug rod 4010, one end of the expansion piece 403 is pushed by the arc-shaped hole 409, so that the expansion piece 403 moves outward along the chute 405 inside the insertion hole 404. And one end of the pull wire 3 is fixed on the expansion piece 403. Thus, the distance between the lower ends of the pull wire 3 is adjusted, achieving the effect of adjusting the size of the space for placing the item to be measured.

[0028] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0029] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A new type of three-wire pendulum experiment instrument, characterized in that: It includes a frame assembly (1), an installation assembly (2) is fixedly installed at the upper end of the frame assembly (1). The installation assembly (2) includes an installation plate (201), one end of the installation plate (201) is fixed on the frame assembly (1), and the other end of the installation plate (201) is rotatably installed with an upper disc (202). Three adjusting shafts (203) are rotatably installed on the upper disc (202) in a circumferential array. A stay wire (3) is fixedly installed around the adjusting shaft (203). A lower disc assembly (4) with adjustable size is fixedly installed between the lower ends of the stay wires (3).

2. The novel three-wire pendulum experiment instrument according to claim 1, wherein: The frame assembly (1) includes a placing rack (101) with adjustable placing foot height, and the placing rack (101) is of a V-shaped structure. An expansion rod (102) is fixedly installed above one end of the placing rack (101). The upper end of the expansion rod (102) is fixedly installed with a connecting head (103). One end of the installation plate (201) is fixedly installed on the connecting head (103).

3. The novel three-wire pendulum experiment instrument according to claim 2, characterized in that: A blind hole (104) with a square structure is opened at the upper end of the connecting head (103). A plug (204) with a square structure is fixedly installed at one end of the installation plate (201). A connecting bolt (205) is vertically threadedly connected to the plug (204), and one end of the connecting bolt (205) is threadedly connected to the lower end inside the blind hole (104).

4. The novel three-wire pendulum experiment instrument according to claim 1, wherein: A collection module (206) is fixedly installed at the middle position of the lower surface of the upper disc (202). The collection module (206) uses a ccd camera. A processor (207) is fixedly installed on the upper surface of the installation plate (201), and the processor (207) is wirelessly signal-connected to the lower disc assembly (4).

5. The novel three-wire pendulum experiment instrument according to claim 1, wherein: The lower disc assembly (4) includes a disc body (401). An adjusting disc (402) is rotatably installed at the middle position inside the disc body (401). Expansion pieces (403) are slidably clamped in a circumferential array on the outer side of the disc body (401). The stay wire (3) is fixedly installed at the upper end of one side of the expansion piece (403). The adjusting disc (402) is clamped with the expansion piece (403).

6. The novel three-wire pendulum experiment instrument according to claim 5, wherein: Insertion holes (404) are evenly opened on the outer side of the disc body (401). A chute (405) is opened at the lower end inside the insertion hole (404). The expansion piece (403) is inserted into the insertion hole (404), and a slider (406) that coincides with the chute (405) is fixedly installed at the lower end of the expansion piece (403).

7. The novel three-wire pendulum experiment instrument according to claim 6, wherein: Grooves (407) are opened inside the disc body (401) between the insertion holes (404). The adjusting disc (402) is rotatably installed inside the grooves (407). A driving motor (408) with a storage battery is fixedly installed at the middle position of the lower end of the disc body (401). The output end of the driving motor (408) is fixedly connected to the adjusting disc (402).

8. The novel three-wire pendulum experiment instrument according to claim 7, wherein: The adjusting disc (402) is provided with arc-shaped holes (409) arranged in a circumferential array, and a plug rod (4010) is fixedly installed on the lower side of one end of the extension piece (403), and the plug rod (4010) is inserted into the arc-shaped holes (409).

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