CN206451432U

CN206451432U - A kind of high school physicses friction force demonstration device

Info

Publication number: CN206451432U
Application number: CN201720110736.3U
Authority: CN
Inventors: 刘力铭
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-02-06
Filing date: 2017-02-06
Publication date: 2017-08-29
Anticipated expiration: 2027-02-06

Abstract

The utility model is related to teaching aid technical field, and disclose a kind of high school physicses friction force demonstration device, including base, the bottom surface of the base is fixedly connected with supporting leg, the upper surface of the base, which is from left to right fixedly connected sequentially, support bar and installing plate, and the top of the support bar is fixedly connected with wrap-up, and the upper surface of the installing plate has been bolted to connection dynamometer, the connect band of the dynamometer is wound with hook, and the surface wrap of the hook has the first rope.The high school physicses friction force demonstration device, by setting dynamometer, movable block and wrap-up, rotating rocker, wrap-up gets up the winding of the second rope, so as to pull movable block lateral movement to the left, so as to pull dynamometer to measure frictional force, it is simple in construction, it is easy to operate, while dynamometer, movable block and wrap-up are located at same straight line, and the intervention without external force, it is more accurate to detect.

Description

A kind of high school physicses friction force demonstration device

Technical field

The utility model is related to teaching aid technical field, specially a kind of high school physicses friction force demonstration device.

Background technology

Frictional force is a kind of power of critical nature, exercise of the high school student in study frictional force knowledge and analysis direction In, most students feel to have certain difficult teacher during the explanation of frictional force force analysis, can not be vivid say Solution is clear, therefore can use friction force demonstration device mostly, and friction force demonstration device can be straight by the size and Orientation of frictional force Show with seeing, the study and correct thinking for being beneficial to student are formed.

A kind of physics teaching is provided in the U of Chinese patent CN 250609072 with friction force demonstration device is probed into, by surveying Power meter, fixed pulley, slider box guide wheel are isostructural to be coordinated, and the plane of various degree of roughness can be simulated in presentation process, to visit The problem of studying carefully frictional force size, while the size of pressure can be changed to probe into the size of frictional force；Dynamometer in the patent Right angle setting, changes the direction of rope by fixed pulley, so as to realize sliding block transverse shifting to determine frictional force size；But The power of dynamometer vertical direction causes power to be decomposed to easily occurring direction deflection during transverse conversion, has measurement result inaccurate Situation occurs, while the presence of fixed pulley has certain friction with rope, can also make measurement result inaccurate.

Utility model content

(1) technical problem solved

In view of the shortcomings of the prior art, the utility model provides a kind of high school physicses friction force demonstration device, solves The problem of friction force demonstration measurement device result is inaccurate.

(2) technical scheme

To achieve the above object, the utility model provides following technical scheme：A kind of high school physicses friction force demonstration device, Including base, the bottom surface of the base is fixedly connected with supporting leg, and the upper surface of the base is from left to right fixedly connected sequentially There are support bar and installing plate, the top of the support bar is fixedly connected with wrap-up, and the upper surface of the installing plate passes through spiral shell Bolt is fixedly connected with dynamometer, and the connect band of the dynamometer is wound with hook, and the surface wrap of the hook has the first rope, One ends wound of first rope away from hook has retainer ring, and the two ends of the retainer ring are consolidated with the middle part of movable block right flank The second rope, the described one end of second rope away from movable block are fixedly connected with the middle part of fixed connection, the movable block left surface It is wrapped on the spool of wrap-up.

It is preferred that, the quantity of the supporting leg is four, and fixed plate, four fixations are mounted between adjacent support legs The top surface of plate is fixedly connected with the bottom surface of base.

It is preferred that, the upper surface of the movable block offers article putting groove, and the quantity of the article putting groove is two.

It is preferred that, the front of the wrap-up is provided with rocking bar.

It is preferred that, the two ends of the dynamometer indicator are overlapped with the scale end of dynamometer respectively.

(3) beneficial effect

Compared with prior art, the utility model provides a kind of high school physicses friction force demonstration device, and possessing following has Beneficial effect：

1st, the high school physicses friction force demonstration device, by setting dynamometer, movable block and wrap-up, rotating rocker, Wrap-up gets up the winding of the second rope, so that movable block lateral movement to the left is pulled, so that pull dynamometer to measure frictional force, It is simple in construction, it is easy to operate, while dynamometer, movable block and wrap-up are located at same straight line, and the intervention without external force, inspection It is more accurate to survey.

2nd, the high school physicses friction force demonstration device, by setting fixed plate, places apparatus for demonstrating more steady, passes through Article putting groove is set, gravity block or counterweight can be placed, changes the size of pressure to probe into the size of frictional force, is shaken by setting Bar, uses wrap-up more convenient, take-up is more steady, makes to probe into more accurate, by the restriction to dynamometer indicator, subtracts Few detection error, makes detection more accurate.

Brief description of the drawings

Fig. 1 is the utility model structure front view；

Fig. 2 is the utility model structure top view.

In figure：1 base, 2 supporting legs, 3 fixed plates, 4 support bars, 5 installing plates, 6 wrap-ups, 7 bolts, 8 dynamometers, 9 Hook, 10 first ropes, 11 retainer rings, 12 movable blocks, 13 article putting grooves, 14 second ropes, 15 rocking bars.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belongs to the scope of the utility model protection.

Fig. 1-2, a kind of high school physicses friction force demonstration device, including base 1 are referred to, the bottom surface of base 1 is fixedly connected Have a supporting leg 2, the quantity of supporting leg 2 to be mounted on fixed plate 3 between four, and adjacent support legs 2, four fixed plates 3 Bottom surface of the top surface with base 1 is fixedly connected, by setting fixed plate 3, make apparatus for demonstrating place it is more steady, base 1 it is upper Surface, which is from left to right fixedly connected sequentially, support bar 4 and installing plate 5, and the top of support bar 4 is fixedly connected with wrap-up 6, The upper surface of installing plate 5 is fixedly connected with dynamometer 8 by bolt 7, the two ends of the indicator of dynamometer 8 respectively with dynamometer 8 Scale end is overlapped, and under the spring nature of dynamometer 8, the two ends of indicator are located at the zero graduation line of dynamometer 8, pass through Restriction to the indicator of dynamometer 8, reduces detection error, makes detection more accurate, the connect band of dynamometer 8 is wound with hook 9, The surface wrap of hook 9 has the first rope 10, and the first one ends wound of the rope 10 away from hook 9 has retainer ring 11, retainer ring 11 Two ends with being fixedly connected in the middle part of the right flank of movable block 12, dynamometer 8, movable block 12 and wrap-up 6 be located at same straight line, By setting dynamometer 8, movable block 12 and wrap-up 6, rotating rocker 15, wrap-up 6 gets up the winding of the second rope 14, So as to pull the lateral movement to the left of movable block 12, so that pull dynamometer 8 to measure frictional force, it is simple in construction, it is easy to operate, survey simultaneously Power meter 8, movable block 12 and wrap-up 6 are located at same straight line, and the intervention without external force, detect more accurate, movable block 12 Upper surface offer article putting groove 13, the quantity of article putting groove 13 is two, by setting article putting groove 13, can place gravity block or Person's counterweight, the size for changing pressure is fixedly connected with the second rope to probe into the middle part of the size of frictional force, the left surface of movable block 12 Rope 14, the second one ends wound of the rope 14 away from movable block 12 is on the spool of wrap-up 6, the front installation of wrap-up 6 There is rocking bar 15, by setting rocking bar 15, use wrap-up 6 more convenient, take-up is more steady, makes to probe into more accurate.

The electric elements occurred in this article are electrically connected with extraneous main controller and 220V civil powers, and main controller can be meter Calculation machine etc. plays the conventionally known equipment of control.

In summary, high school physicses friction force demonstration device, by setting dynamometer 8, movable block 12 and wrap-up 6, rotating rocker 15, wrap-up 6 gets up the winding of the second rope 14, so that the lateral movement to the left of movable block 12 is pulled, so as to draw The dynamic measurement of dynamometer 8 frictional force, it is simple in construction, it is easy to operate, while dynamometer 8, movable block 12 and wrap-up 6 are positioned at same Straight line, and the intervention without external force, it is more accurate to detect, solves the problem of friction force demonstration measurement device result is inaccurate.

It should be noted that herein, such as first and second or the like relational terms are used merely to a reality Body or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or deposited between operating In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to Nonexcludability is included, so that process, method, article or equipment including a series of key elements not only will including those Element, but also other key elements including being not expressly set out, or also include being this process, method, article or equipment Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that Also there is other identical element in process, method, article or equipment including the key element.

While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art, It is appreciated that these embodiments can be carried out in the case where not departing from principle of the present utility model and spirit a variety of changes, repaiies Change, replace and modification, scope of the present utility model is defined by the appended claims and the equivalents thereof.

Claims

1. a kind of high school physicses friction force demonstration device, including base (1), it is characterised in that：The bottom surface of the base (1) is fixed Supporting leg (2) is connected with, the upper surface of the base (1) is from left to right fixedly connected sequentially and has support bar (4) and installing plate (5), the top of the support bar (4) is fixedly connected with wrap-up (6), and the upper surface of the installing plate (5) passes through bolt (7) Dynamometer (8) is fixedly connected with, the connect band of the dynamometer (8) is wound with hook (9), the surface wrap of the hook (9) There is the first rope (10), one ends wound of first rope (10) away from hook (9) has retainer ring (11), the retainer ring (11) two ends are fixedly connected with being fixedly connected in the middle part of movable block (12) right flank in the middle part of movable block (12) left surface There is the second rope (14), one ends wound of second rope (14) away from movable block (12) is on the spool of wrap-up (6).

2. a kind of high school physicses friction force demonstration device according to claim 1, it is characterised in that：The supporting leg (2) Quantity to be mounted on fixed plate (3) between four, and adjacent support legs (2), the top surface of four fixed plates (3) is and base (1) bottom surface is fixedly connected.

3. a kind of high school physicses friction force demonstration device according to claim 1, it is characterised in that：The movable block (12) Upper surface offer article putting groove (13), the quantity of the article putting groove (13) is two.

4. a kind of high school physicses friction force demonstration device according to claim 1, it is characterised in that：The wrap-up (6) front is provided with rocking bar (15).

5. a kind of high school physicses friction force demonstration device according to claim 1, it is characterised in that：The dynamometer (8) The two ends of indicator are overlapped with the scale end of dynamometer (8) respectively.