Physical experiment demonstration pulley support

Abstract

The utility model discloses a physical experiment demonstration pulley support, which relates to the field of physical experiment teaching and comprises a fixing plate, a supporting rod vertically arranged on the fixing plate, a cross beam detachably arranged at the top of the supporting rod, a hook assembly transversely arranged on the cross beam, and an indicating assembly parallel to the cross beam and capable of vertically moving on the supporting rod. According to the physical experiment demonstration pulley support, data such as the moving distance of a weight and the moving distance of a pulley block tension acting point can be measured conveniently, and therefore the accuracy of experiment results and the efficiency of experiment teaching are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of physical experiment teaching, concretely is a physical experiment demonstration pulley support. BACKGROUND

[0002] In the physical teaching process, pulley experiment is the important content of mechanics teaching. Through the experiment demonstration pulley's working characteristic, can help the student more intuitively understand its working principle, grasps the relevant physical knowledge. In the demonstration process, sometimes need to measure the heavy object moving distance, pulley group tension point moving distance etc. Data, thereby facilitate the student to understand the relevant principle.

[0003] However, the existing pulley experiment device lacks effective auxiliary measuring tool. Usually only relies on the ruler simple measuring tool to carry out manual measurement, not only measurement process is tedious, and because of the measurement position is difficult to accurately determine, leads to the measurement error to be bigger. This not only influences the accuracy of experimental result, also reduces the efficiency of experimental teaching. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of physical experiment demonstration pulley support, the physical experiment demonstration pulley support of this kind facilitates the measurement heavy object moving distance, pulley group tension point moving distance etc. Data, to improve the accuracy of experimental result, the efficiency of experimental teaching.

[0005] The above-mentioned optimization structure of the utility model is realized by the following technical solutions: a kind of physical experiment demonstration pulley support, including fixed plate;

[0006] Supporting rod, the supporting rod is vertically arranged on the fixed plate;

[0007] Crossbeam, the crossbeam is detachably arranged on the top of the supporting rod;

[0008] Hook assembly, the hook assembly is transversely arranged on the crossbeam;

[0009] Indication component, the indication component is arranged in parallel with the crossbeam and can be vertically moved on the supporting rod.

[0010] In some embodiments, the supporting rod includes a rod body, and the rod body is vertically arranged on the fixed plate;

[0011] Slide groove, the slide groove is arranged on the surface of one end of the rod body, and the slide groove is provided with the indication component;

[0012] Strip tooth, the strip tooth is arranged on the side wall of the slide groove.

[0013] In some embodiments, the indication component includes a sliding block, and the sliding block is slidably arranged in the slide groove.

[0014] A rotating groove is arranged on the side of the sliding block close to the rack;

[0015] A gear is rotatably arranged in the rotating groove and engaged with the rack;

[0016] An adjusting member is connected with the gear;

[0017] An indicating rod is transversely arranged on the sliding block and outside the rod body;

[0018] A scale is vertically arranged on the surface of the rod body close to the indicating rod.

[0019] In some embodiments, the adjusting member comprises a rotating shaft, one end of which is rotatably connected with the inner wall of the rotating groove, the other end of which protrudes from the sliding groove, and the gear is coaxially arranged on the rotating shaft;

[0020] A ratchet wheel is coaxially arranged on the rotating shaft;

[0021] A pawl is rotatably arranged on the sliding block and engaged with the ratchet wheel.

[0022] In some embodiments, the adjusting member further comprises an adjusting handle fixedly connected with the pawl.

[0023] In some embodiments, the indicating assembly further comprises a connecting block arranged on the sliding block and protruding from the sliding groove;

[0024] A connecting groove transversely penetrates the connecting block, and the indicating rod is inserted into the connecting groove;

[0025] At least two connecting bolts penetrate the bottom of the connecting block and press the bottom surface of the indicating rod, and the connecting bolts are screw-connected with the connecting block.

[0026] In some embodiments, the cross section of the sliding groove is H-shaped.

[0027] In summary, the present application has the following advantages:

[0028] The physical experiment demonstration pulley support can adjust the position of the indicating rod on the supporting rod through the sliding of the sliding block in the sliding groove, so that the indicating rod accurately points to the experimental object, and the scale on the rod body can accurately measure the experimental data such as the moving distance of the heavy object and the moving distance of the action point of the pulley set, effectively reduces the measurement error, and improves the accuracy of the experimental results and the efficiency of the experimental teaching. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structure schematic view of the utility model;

[0030] Figure 2 is a front view of the utility model;

[0031] Figure 3 is a section schematic view of the utility model support rod;

[0032] Figure 4 is a structure schematic view of the utility model indicating assembly.

[0033] In the drawing: 1, fixed plate; 2, support rod; 21, rod body; 22, sliding groove; 23, strip tooth; 3, crossbeam; 4, hook assembly; 5, indicating assembly; 51, sliding block; 52, rotating groove; 53, gear; 54, adjusting piece; 541, rotating shaft; 542, ratchet wheel; 543, pawl; 55, indicating rod; 56, connecting block; 57, connecting bolt. DETAILED DESCRIPTION

[0034] The technical schemes in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0035] Reference Figures 1-4The utility model provides a physical experiment demonstration pulley support, including fixed plate 1, support rod 2, crossbeam 3, hook assembly 4, indicating assembly 5, fixed plate 1 can be placed on the experiment table top, can place weight on fixed plate 1 to ensure that the support does not shift during the experiment. Support rod 2 is vertically arranged on fixed plate 1, and can provide installation base for crossbeam and indicating assembly, support rod 2 and fixed plate 1 can be detachably connected through bolts, crossbeam 3 is detachably arranged on the top of support rod 2, and can be detachably connected through bolts, facilitating the installation and dismounting of crossbeam 3 and support rod 2, so that the pulley support can be stored after the experiment, hook assembly 4 is transversely arranged on crossbeam 3, and is used for suspending pulleys, weights and other experimental equipment, the number and spacing of hooks can be adjusted according to the experimental requirements to facilitate the suspension of pulleys and weights of different quantities and specifications, hook assembly 4 can be hooks arranged at the bottom of crossbeam 3, which is prior art, and will not be described here, indicating assembly 5 is arranged in parallel with crossbeam 3 and can move vertically on support rod 2, can accurately measure the moving distance of the weight, the moving distance of the action point of pulley set tension and other experimental data, effectively reduces the measurement error and improves the accuracy of experimental results. Indicating assembly 5 and crossbeam 3 are arranged at both ends of support rod 2, can realize the separation of indicating assembly 5 and hook assembly 4, so as to avoid the influence of indicating assembly 5 on the movement of pulleys and weights, and can avoid the gravity center of pulley support from being deviated to one end, and improve the stability of pulley support.

[0036] In some embodiments, the support rod 2 includes a rod body 21, a sliding groove 22 and a strip tooth 23, the rod body 21 is vertically arranged on the fixed plate 1, the sliding groove 22 is arranged on one end surface of the rod body 21, and the indicating assembly 5 is arranged in the sliding groove 22, which can realize the stable sliding of the indicating assembly 5, the strip tooth 23 is arranged on one side wall of the sliding groove 22, and can be matched with the gear 53 in the indicating assembly 5, to realize the accurate movement and positioning of the indicating assembly 5 in the sliding groove 22.

[0037] In some embodiments, the indicating assembly 5 includes a sliding block 51, a rotating groove 52, a gear 53, an adjusting piece 54, an indicating rod 55, a scale, a connecting block 56, a connecting groove and a connecting bolt 57, the sliding block 51 is slidably arranged in the sliding groove 22, the rotating groove 52 is arranged on one side of the sliding block 51 close to the strip tooth 23, the gear 53 is rotatably arranged in the rotating groove 52 and is engaged with the strip tooth 23, through the engagement with the strip tooth 23, the sliding of the sliding block 51 in the sliding groove 22 is realized, the adjusting piece 54 is connected with the gear 53, can control the rotation of the gear 53, so as to adjust the position of the indicating assembly 5, the indicating rod 55 is transversely arranged on the sliding block 51 and is arranged outside the rod body 21, and is used for indicating the measurement position, the scale is vertically arranged on one end surface of the rod body 21 close to the indicating rod 55, the scale can be laser engraved, to ensure the accuracy and durability of the scale, and can be matched with the indicating rod to realize the accurate measurement of experimental data.

[0038] In some embodiments, the adjusting member 54 comprises a rotating shaft 541, a ratchet wheel 542, and a pawl 543. One end of the rotating shaft 541 is rotatably connected to the inner wall of the rotating groove 52, and the other end protrudes into the sliding groove 22. A gear 53 is coaxially arranged on the rotating shaft 541. The ratchet wheel 542 is coaxially arranged on the rotating shaft 541. The pawl 543 is rotatably arranged on the sliding block 51 and is engaged with the ratchet wheel 542. By adjusting the rotation of the pawl 543, the engagement and disengagement of the pawl 543 and the ratchet wheel 542 are controlled, thereby realizing the locking and unlocking of the rotation of the gear 53, and further adjusting the position of the indicating assembly 5.

[0039] In some embodiments, the adjusting member 54 further comprises an adjusting handle fixedly connected with the pawl 543, facilitating the adjustment of the pawl 543 and realizing the adjusting effect of the adjusting member 54.

[0040] In some embodiments, the indicating assembly 5 further comprises a connecting block 56, a connecting groove, and at least two connecting bolts 57. The connecting block 56 is arranged on the sliding block 51 and protrudes into the sliding groove 22. The connecting groove transversely penetrates through the connecting block 56, and the indicating rod 55 is inserted into the connecting groove. The top of the two connecting bolts 57 penetrates through the bottom of the connecting block 56 and is pressed against the bottom surface of the indicating rod 55. The connecting bolts 57 are screw-connected with the connecting block 56. By adjusting the tightening degree of the connecting bolts, the extension length of the indicating rod 55 can be conveniently adjusted to meet the measurement requirements of different experiments.

[0041] In some embodiments, the cross section of the sliding groove 22 is H-shaped, which can increase the contact area of the sliding block 51 and the sliding groove 22, provide a stable track for the sliding of the sliding block 51, and prevent the indicating assembly 5 from shaking or disengaging during the sliding process.

[0042] The specific working principle is as follows:

[0043] In specific use, the fixed plate 1 is placed on the experimental bench, the support rod 2 is fixed on the fixed plate 1, the cross beam 3 is installed on the top of the support rod 2, the hook assembly 4 is fixed on the cross beam 3 according to actual needs, the indicating rod 55 is inserted into the connecting groove, and the indicating rod 55 is fixed on the sliding block 51 by the connecting bolts 57, thereby completing the installation of the experimental device.

[0044] During the experiment, according to the experimental requirements, the pulleys and weights required are hung on the hook assembly 4 so that they are in the initial position. The pawl 543 is adjusted to disengage the pawl 543 from the ratchet wheel 542, thereby releasing the locking of the rotation of the gear 53. The sliding block 51 is moved to slide in the rotating groove 52, the indicating rod 55 is aligned with the experimental measurement position, the initial position is read by the scale, and then the pawl 543 is rotated to engage the pawl 543 with the ratchet wheel 542.

[0045] During the experiment, according to the experimental requirements, the position of the pulley and the weight is adjusted to be in the final state. The pawl 543 is adjusted to be separated from the ratchet wheel 542, the indicating rod 55 is aligned with the experimental measurement position, the final position is read through the scale, and thus the distance of the weight movement is accurately obtained.

[0046] End stage of the experiment: after the experiment, the experimental equipment is disassembled, and each part of the support is stored for next use.

[0047] The above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A physical demonstration pulley stand for experiments, characterized in that: It comprises a fixed plate (1); A support rod (2) is vertically arranged on the fixed plate (1); A crossbeam (3) is detachably arranged on the top of the support rod (2); A hook assembly (4) is transversely arranged on the crossbeam (3); An indicating assembly (5) is arranged in parallel with the crossbeam (3) and can vertically move on the support rod (2).

2. The physical experiment demonstration pulley support according to claim 1, characterized in that: The support rod (2) comprises a rod body (21) vertically arranged on the fixed plate (1); A sliding groove (22) is arranged on the surface of one end of the rod body (21), and the indicating assembly (5) is arranged in the sliding groove (22); A strip tooth (23) is arranged on one side wall of the sliding groove (22).

3. The physical experiment demonstration pulley support according to claim 2, characterized in that: The indicating assembly (5) comprises a sliding block (51) slidably arranged in the sliding groove (22); A rotating groove (52) is arranged on the side of the sliding block (51) close to the strip tooth (23); A gear (53) is rotatably arranged in the rotating groove (52) and engaged with the strip tooth (23); An adjusting part (54) is connected with the gear (53); An indicating rod (55) is transversely arranged on the sliding block (51) and outside the rod body (21); A scale is vertically arranged on the surface of one end of the rod body (21) close to the indicating rod (55).

4. The physical experiment demonstration pulley support according to claim 3, characterized in that: The adjusting part (54) comprises a rotating shaft (541) rotatably connected with the inner wall of the rotating groove (52) at one end and protruding from the sliding groove (22) at the other end, and the gear (53) is coaxially arranged on the rotating shaft (541); A ratchet wheel (542) is coaxially sleeved on the rotating shaft (541); A pawl (543) is rotatably arranged on the sliding block (51) and engaged with the ratchet wheel (542).

5. The physical experiment demonstration pulley support according to claim 4, characterized in that: The adjusting part (54) further comprises an adjusting handle fixedly connected with the pawl (543).

6. The physical experiment demonstration pulley support according to claim 3, characterized in that: The indicating assembly (5) further comprises a connecting block (56) arranged on the sliding block (51) and protruding from the sliding groove (22); A connecting groove transversely penetrates the connecting block (56), and the indicating rod (55) is inserted into the connecting groove; At least two connecting bolts (57) penetrate the bottom of the connecting block (56) at the top and are pressed against the bottom surface of the indicating rod (55), and the connecting bolts (57) are screw-connected with the connecting block (56).

7. The physical experiment demonstration pulley support according to claim 2, characterized in that: The cross section of the sliding groove (22) is H-shaped.

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