CN201000681Y

CN201000681Y - Compound pendulum instrument

Info

Publication number: CN201000681Y
Application number: CNU2007200783647U
Authority: CN
Inventors: 代伟; 蔡世全; 陈太红
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-01-29
Filing date: 2007-01-29
Publication date: 2008-01-02
Anticipated expiration: 2017-01-29

Abstract

The utility model relates to a compound pendulum instrument, which comprises a bottom seat, an upright column (3) with one end fixed on the bottom seat, a base seat (4) supporting an elongated pendulum bar (7) fixed on the upright column (3), a photo-electric device (11) cooperating with the lower end of the pendulum bar (7), a sliding seat (12) mounting the photo-electric device (11) actively cooperating with the column body of the upright column (3), wherein the pendulum bar (7) is supported by an axle (6) with a bearing, and the upright column (3) cooperating with the sliding seat (12) is provided with a guiding and positioning component. Compared with the prior art, the pendulum bar mounting positioning of the utility model becomes reliable, the tightening is firm, and the photo-electric components are easy to adjust.

Description

The physical pendulum instrument

Affiliated field

The utility model relates generally to a kind of physical test instrument, particularly a kind of physical pendulum instrument.

Background technology

The physical pendulum instrument is a kind of physical test instrument; be mainly used in the basic physics student of universities and colleges and test usefulness; hunting period and axis of swing position relation for the research compound pendulum; ask conjugate points and the equivalent single armed of surveying compound pendulum long; measure acceleration of gravity or the like subject; experiment content is abundant, is a kind of physical test instrument commonly used.Known physical pendulum instrument comprises base, and an end is fixed on the column on the base, is fixed with the pedestal of a support one strip fork in the column upper end, and the lower end of fork cooperates with an electrooptical device, and the slide that electrooptical device is installed cooperates with the shaft of column is movable.The J-LD23 type physical pendulum instrument produced of Xi'an Educational Instrument Factory for example, mainly form by said structure, but known physical pendulum instrument has not enough place, what for example support the suspension of strip fork is the axle of a band edge of a knife, with back edge of a knife wearing and tearing often cause the position of fork uncertain, influence measuring accuracy, the slide of installation electrooptical device and the position of column are uncertain, cause the position of electrooptical device to be not easy to harmonize, can produce the high measuring error of 1cm the most for a long time, and the column of original device is too short, because the length of column must be placed in instrument a limit inadequately, photogate is placed on the stool and could measures hunting period when the hitch point of fork is up mobile gradually; Do not have the balance indicating device on the pedestal of former instrument, the adjustment instrument is very inconvenient or the like, owing to there is not angle indicating device, the angle of pivot angle can't be measured in the measurement.In order to overcome the shortcoming of known physical pendulum instrument, it is done some improvement be necessary.

The utility model content

The purpose of this utility model is to provide one can overcome the known technology shortcoming, regulates more conveniently, measures physical pendulum instrument more accurately and reliably.For achieving the above object, scheme of the present utility model is: the axle supporting that described fork is held by a tape spool, the column that cooperates with slide is provided with guiding and setting element.

Further scheme comprises, the part that described axle cooperates with the fork hole has elastic opening.

Adopt such scheme, the installation of fork becomes the location reliably, tightens up firmly, and the wearing and tearing that bring to instrument in use reduce, and the photovalve that is installed on the slide also is easy to regulate, thereby has realized the purpose of this utility model.

Below in conjunction with diagram and embodiment scheme is described in more detail.

Description of drawings

Fig. 1 is the front view of physical pendulum instrument;

Fig. 2 is the right view of Fig. 1;

Fig. 3 is the vertical view of Fig. 1.

Embodiment

As shown in Figure 1, the physical pendulum instrument of this programme comprises base 1, be distributed with the screw 2 of regulating base 1 horizontal level on the base 1 equably, column 3 is fixed on the position that base 1 is in balance, and pedestal 4 is fixed on the upper end of column 3, and pedestal 4 upper supports one tape spool holds 5 axle 6, fork 7 is by axle 6 supportings, the part that the end of axle 6 cooperates with the fork hole has elastic opening 8, also is provided with the fan-shaped label 9 that is carved with angle on the pedestal 4, as shown in Figure 2.

Fork 7 is a strip rigid body, and present embodiment is 6 * 20 (mm) ²The section bar of sectional area constitutes, therefrom light to two ends difference scale 30～0～30 (cm) in the front, minimum calibration is 1mm, 60 of Φ 8mm swing axis holes are arranged on the bar, and respectively there are a fine-tuning nut 23 and light blocking needle 10 in the two ends of fork 7, as previously mentioned, fork 7 is to cooperate with the elastic ends of axle 6 by the hole that is located at the upper end to be suspended on the pedestal 4 that is supported by column 3, guarantee the kinematic accuracy of fork 7, must guarantee the installation accuracy of axle 6, this is self-evident.

The lower end of fork 7 is provided with light blocking needle 10, described light blocking needle 10 cooperates with an electrooptical device 11, electrooptical device links to each other with an electronic device, electrooptical device 11 is installed on the photogate slide 12, photogate slide 12 is installed on the column 3, photogate slide part comprises locking ball 13, holddown spring 14, the bolt 15 that cooperates with spring 14, the column periphery upper edge axis that cooperates with slide 12 has gathering sill 16 and pilot hole 17, the bolt 18 that cooperates with locating slot 16, pilot hole 17 are that the spacing of each aperture of present embodiment is 1cm at the uniform aperture of upper edge, face of cylinder axis.

Base 1 be shaped as circular arc, as shown in Figure 3, level meter 19 is installed on base 1, be convenient to adjust the horizontal level of bases by the footing screw 2 of regulating pedestal.

Footing screw 2 adopts fine thread, is fixed with a plastics handwheel 20 on the key of screw 2, and the end of screw 2 is placed on the base cushion block 21, does not slide on the table with the assurance instrument, and regulates accurately.

Regulate for convenient, the column 3 of present embodiment is longer than the column of known technology.

The installation of instrument is undertaken by diagram.

1, the installation of photogate bearing: earlier the photogate back up pad is fixed on the slide 12 with the double clamping screw 22 in location, uses screw 15 with bead 13 again, spring 14 is pressed in the pilot hole and fixes, and then whole parts is inserted in the column 3 along fixing orientation.

2, the installation of base: earlier column 3 is installed in the mounting hole of circular arc base.Use nut lock.Pedestal 4 is installed on the upper end of column, screws acorn nut then.

3, the installation of fork: fine-tuning nut is installed in the two ends of fork, earlier screw is screwed in about 4 millimeters deep in the screw of fork end during installation, with nut bolt is locked again, make it and to become flexible.

4, other annexes are installed respectively when doing experiment.

Claims

1, a kind of physical pendulum instrument, the physical pendulum instrument comprises base, one end is fixed on the column (3) on the base, be fixed with the pedestal (4) of a support one strip fork (7) in column (3) upper end, the lower end of fork (7) cooperates with an electrooptical device (11), the slide (12) that electrooptical device (11) is installed cooperates with the shaft of column (3) is movable, it is characterized in that: axle (6) supporting that described fork (7) is held by a tape spool, the column (3) that cooperates with slide (12) is provided with guiding and setting element.

2, physical pendulum instrument according to claim 1 is characterized in that: the part that described axle (6) cooperates with the fork hole has elastic opening (8).

3, physical pendulum instrument according to claim 1 is characterized in that: also be provided with the fan-shaped label (9) that is carved with angle on the pedestal (4).

4, physical pendulum instrument according to claim 1 is characterized in that: level meter (19) is installed on base (1).

5, physical pendulum instrument according to claim 1 is characterized in that: have long column (3).

6, physical pendulum instrument according to claim 1 is characterized in that: column (3) the periphery upper edge axis that cooperates with slide (12) has gathering sill (16) and pilot hole (17).