CN205984034U

CN205984034U - Appearance is probed to lever balance condition

Info

Publication number: CN205984034U
Application number: CN201620452214.7U
Authority: CN
Inventors: 权亮; 裴会明
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-05-12
Filing date: 2016-05-12
Publication date: 2017-02-22
Anticipated expiration: 2026-05-12

Abstract

The utility model provides an appearance is probed to lever balance condition, characterized by: during the base recess on the base was fixed to vertical support one end, the horizontal level of arm of force scale was fixed at vertical support waist, and vertical support top has the right angle sector. The light is hung cover, light line, is caught hold of the sign indicating number with a hook and connects in order. The change lever has flexible change lever conversion end. The change lever has balanced nut with the both ends of change lever conversion end. Lever hole, vertical bracket aperture, limit are changeed the hole and are concatenated with balanced pivot in order. The light is hung to overlap to be connected in order to hang to get wantonly on the change lever with the hook sign indicating number with light line and is moved. The beneficial effects are that, the design of the right and wrong lever of change is used, can probe the equilibrium condition of straight lever and bent lever in proper order conveniently, reachs the conclusion that has the universality.

Description

Lever equilibrium condition exploring instrument

Technical field

This utility model is related to a kind of physics teaching in secondary school instrument, especially relates to a kind of spy for lever equilibrium condition Study carefully instrument.

Background technology

At present, there is some deficiency following in known students in middle and primary schools' lever balance experiment equipment：One is that it is only capable of studying Straight lever does not have universality in the equilibrium condition of horizontal level, the conclusion drawing；Secondly, he understands lever balance meeting to student There is different degrees of impact, partial students think that lever is exactly to balance, when other positions are static just when horizontal level is static Uneven；3rd, because its arm of force scale is on lever, student is understood that the arm of force can produce deviation, has partial students total Think the arm of force just on lever, also can make confirmatory the having a surplus of experiment and inquiry is not enough, because student's previewing before experiment, Probably it has been aware of lever equilibrium condition, when testing movable hook code, can feel and unconsciously hook code be moved on lever Corresponding graduation position.4th, former experiment equipment does not limit the use turning device, and the stability of experiment is bad.

Utility model content

There is no universality thick stick is understood to student in the conclusion that draws of equilibrium condition of horizontal level to solve straight lever Bar balance has different degrees of impact and the single deficiency of former experiment equipment structure function, and this utility model provides a kind of thick stick Bar equilibrium condition exploring instrument.

This utility model solves its technical problem and be employed technical scheme comprise that a kind of lever equilibrium condition exploring instrument, including Base, vertical rack, change lever, limit turn device, arm of force scale, balanced pointers, lightweight hanging sleeve, light line, hook code, it is characterized in that： Described vertical rack one end is fixed in the base groove on base, and described arm of force scale transverse horizontal is fixed on vertical rack waist Portion, described vertical rack top has right angle covering of the fan, and described lightweight hanging sleeve, light line, hook code are sequentially connected with.Described change lever tool There is flexible change lever end of convert.Described change lever has balance nut with the two ends of change lever end of convert.Described Lever hole, vertical rack hole, limit turn hole are sequentially concatenated with balance shaft.Described lightweight hanging sleeve and light line and hook code are sequentially connected with permissible Change lever arbitrarily hangs and takes and moves.

The beneficial effects of the utility model are the design uses of change lever, change lever end of convert, can be more easily Probe into straight lever and the equilibrium condition of bent lever successively, draw the conclusion with universality.Arm of force scale design application so that Lever separates with the arm of force, can correct partial students and always consider deviation all on lever for the arm of force moreover it is possible to accurately measure the arm of force. The design of balanced pointers and right angle covering of the fan uses, and can not only definitely indicate static (balance) position of lever moreover it is possible to help learn What life is better understood from is lever balance, can also attract the attention of student simultaneously, allow experimenter to have no time to focus first on the arm of force Size so that experiment becomes inquiry experiment truly.Limit turns the design of device with so that testing safer, stream Smooth and stable.The effect of balance nut is changed into adjusting lever diverse location static (balance).

Brief description

With reference to the accompanying drawings and examples this utility model is further illustrated.

Fig. 1 is positive structure schematic of the present utility model.

Fig. 2 is structure schematic diagram of the present utility model.

Fig. 3 is vertical rack schematic diagram of the present utility model.

Fig. 4 is arm of force scale schematic diagram of the present utility model.

Fig. 5 is balance rotating shaft schematic diagram of the present utility model.

Fig. 6 is that limit of the present utility model turns device schematic diagram.

Fig. 7 is base schematic diagram of the present utility model.

Fig. 8 is change lever positive structure schematic of the present utility model.

Fig. 9 is change lever reverse structure schematic of the present utility model.

Figure 10 is change lever end of convert positive structure schematic of the present utility model.

Figure 11 is change lever end of convert reverse structure schematic of the present utility model.

Figure 12 is lightweight hanging sleeve of the present utility model, light line, hook code component diagram.

Figure 13 is experiment schematic diagram of the present utility model.

Figure 14 is experiment schematic diagram of the present utility model.

Figure 15 is experiment schematic diagram of the present utility model.

Figure 16 is experiment schematic diagram of the present utility model.

In figure 1. right angle covering of the fan, 2. limits and turns device, 3. change lever, 4. change lever end of convert, 5. balance nut, 6. lightweight Hanging sleeve, 7. light line, 8. hook code, 9. arm of force scale, 10. base, 11. balanced pointers, 12. lever holes, 13. vertical racks, 14. bottoms Seat groove, 15. balance rotating shafts, 16. limit turn holes, 17. vertical rack holes.

Specific embodiment

In in figure, a kind of lever equilibrium condition exploring instrument, turn device including base 10, vertical rack 13, change lever 3, limit 2nd, arm of force scale 9, balanced pointers 11, lightweight hanging sleeve 6, light line 7, hook code 8, is characterized in that：Described vertical rack 13 one end is fixed In the base groove 14 on base 10, described arm of force scale 9 transverse horizontal is fixed on vertical rack 13 waist, described vertical Frame 13 top has right angle covering of the fan 1, and described lightweight hanging sleeve 6, light line 7, hook code 8 are sequentially connected with.Described change lever 3 has bendable Bent change lever end of convert 4.Described change lever 3 has balance nut 5 with the two ends of change lever end of convert 4.Described thick stick Rod aperture 12, vertical rack hole 17, limit turn hole 16 are sequentially concatenated with balance shaft 15.Described lightweight hanging sleeve 6 is suitable with light line 7 and hook code 8 Secondary connection can arbitrarily hang and take and move with change lever end of convert 4 on change lever 3.

Laboratory operating procedures and operational approach.

First, change lever 3 and change lever end of convert 4 are tuned into straight lever, then use balance shaft 15 by lever hole 12 with Vertical rack hole phase concatenation, makes the light line 7 vertically stretching just contact with arm of force scale 9.Carry lightweight at straight lever two ends The light line 7 of hanging sleeve 6.

Second, adjustment nut 5, so that balanced pointers 11 is referred on 0 ° of groove, now change lever 3 is in horizontal position horizontalization Weighing apparatus.Again two limits are turned device 2 and just touch lever fixing limit turn to both sides turn.

3rd, hang up an appropriate number of hook code 8, catch the lightweight hanging sleeve 6 on the left side with left hand, draw limit in the right hand and turn device 2. Move the hook code 8 on both sides again with left and right two handss respectively, eyes rooted balanced pointers 11, when balanced pointers 11 point to 0 ° again When, decontrol both hands, the value of power arm and resistance arm is read on arm of force scale 9, and together with hook code 8 number record in the table.

4th, take off hook code 8, adjustment nut 5, make balanced pointers 11 indicate at another groove (as 5 ° of grooves), Now change lever 3 is to tilt static (balance), then repeats aforesaid operations, so that balanced pointers 11 is referred to again in 5 ° of grooves Place.Read arm of force value again, record in the table together with hook code 8 number scale.Change lever 3 can be probed into stretch any position static The equilibrium condition of (balance).

5th, take off hook code 8, change lever end of convert 4 is tuned into curved, then repeat aforesaid operations, and record data. The equilibrium condition that change lever end of convert 4 is tuned into curved static at an arbitrary position (balance) can be probed into.

Claims

1. a kind of lever equilibrium condition exploring instrument, including base (10), vertical rack (13), change lever (3), limit turn device (2), Arm of force scale (9), balanced pointers (11), lightweight hanging sleeve (6), light line (7), hook code (8), is characterized in that：Described vertical rack (13) one end is fixed in the base groove (14) on base (10), and described arm of force scale (9) transverse horizontal is fixed on vertically props up Frame (13) waist, described vertical rack (13) top has right angle covering of the fan (1), described lightweight hanging sleeve (6), light line (7), hook code (8) it is sequentially connected with.

2. a kind of lever equilibrium condition exploring instrument according to claim 1, is characterized in that：Described change lever (3) has Flexible change lever end of convert (4).

3. a kind of lever equilibrium condition exploring instrument according to claim 1, is characterized in that：Described change lever (3) with mutually The two ends becoming lever end of convert (4) have balance nut (5).

4. a kind of lever equilibrium condition exploring instrument according to claim 1, is characterized in that：Described lever hole (12), vertically Bracket holes (17), limit turn hole (16) are sequentially with balance rotating shaft (15) concatenation.

5. a kind of lever equilibrium condition exploring instrument according to claim 1, is characterized in that：Described lightweight hanging sleeve (6) with light Line (7) and hook code (8) are sequentially connected with arbitrarily to hang and take on change lever (3) and move.