CN102645677B - Wriggle-free compound pendulum consisting of metal ring and strip clamp slot - Google Patents

Abstract

The non-twisting compound pendulum composed of metal rings and bar-shaped slots relates to the field of compound pendulums, in particular to the manufacture of non-twisting compound pendulum pendulum rods used in the experiment of measuring the acceleration of gravity with the compound pendulum. Most of the complex pendulum pendant and the pendant are in line contact and are prone to twisting; some patents use knife-edge contact, and the durability of the pendant and pendant is poor. In order to overcome the deficiencies of the ordinary compound pendulum being easy to twist and the knife-edge contact being easily damaged, the present invention uses metal rings to form a compound pendulum swing bar. A ring with a diameter of 10mm made of stainless steel or high-hardness aluminum alloy is close together to form a complex pendulum pendulum. The ring is clamped by stainless steel or high-hardness aluminum alloy slots on both sides of the ring, and then the ring is fixed in the slot by spot welding. Among them, the pendant of the compound pendulum is a stainless steel or high-hardness aluminum alloy cylinder with a diameter of 3mm. The point contact can effectively avoid the twisting of the double pendulum swing bar; the point contact is not a knife-edge contact, which improves the durability of the double pendulum swing bar and the pendant.

Description

Twist-free compound pendulum composed of metal ring and bar-shaped slot

technical field

The invention relates to the field of compound pendulums, in particular to the manufacture of swing rods for non-twisting compound pendulums used in the experiment of measuring the acceleration of gravity with compound pendulums.

Background technique

Most of the pendant pendant is in line contact with the pendant. Due to the unevenness of the pendant, the pendant pendant is prone to twisting, and it takes a long time to adjust the level of the pendant. There are patents that use knife-edge contact. The knife-edge is point contact, which can Effectively avoid twisting, but the sharper the knife edge is, the closer it is to point contact, and the sharper the knife edge will damage the pendant, and the knife edge itself will gradually wear out, making the pendant and the swing bar less durable.

Contents of the invention

In order to overcome the deficiencies of the ordinary compound pendulum being easy to twist and the knife-edge contact being easily damaged, the present invention uses metal rings to form a compound pendulum swing bar.

The technical solution adopted by the present invention to solve the technical problem is: use a metal ring with an outer diameter of 10 mm and an inner diameter of 6 mm to form a complex pendulum pendulum swing rod, the cross section of which is a circle with a diameter of 2 mm, and the material is a harder stainless steel Or aluminum alloy, on both sides of the ring, the ring is clamped by stainless steel or high-hardness aluminum alloy slots. The slots on both sides have through holes with a diameter of 2mm at equal distances, and the distance is 10mm from the outer diameter of the ring. The circular ring is welded in the draw-in grooves on the left and right sides by spot welding on both sides. The pendant of the compound pendulum is a stainless steel or high-hardness aluminum alloy cylinder with a diameter of 3mm.

The beneficial effects of the present invention are: point contact is realized between the double pendulum swing rod and the pendant, which can effectively avoid the twisting of the double pendulum swing rod; the point contact is not knife-edge contact, the contact point is not sharp, and the pressure can realize the reaction through slight deformation, thereby Ensure the peaceful coexistence of the swing rod and the pendant, and improve the durability of the swing rod and the pendant.

Description of drawings

Figure 1 is a schematic diagram of a compound pendulum pendulum.

Wherein, 1, compound pendulum swing bar, 2, metal ring, 3, through hole.

Detailed ways

There are two card slots, the width of the card slot is 3mm, and the depth of the slot body is 2mm. The card slot has through holes 3 at equal distances. The diameter of the through hole is 2mm. The through hole is located in the middle of the card slot in the left and right directions. The distance between the through holes is 10mm.

The swing rod 1 of the complex pendulum is composed of 99 metal rings with a diameter of 10mm. The metal rings are made of stainless steel or high-hardness aluminum alloy. The cross section of the ring is a circle with a diameter of 2mm. Clamp 99 rings with card slots to ensure that all rings are in close contact, and the connection lines of the contact points between all rings pass through the center of each ring, and the card slots on the left and right sides have equidistant through holes 3 , the metal ring can be seen at the position of the through hole, and the metal ring is welded in the card slots on the left and right sides by double-sided spot welding at the position of the through hole, and the swing bar of the compound pendulum is completed.

The pendant of the compound pendulum is a stainless steel or high-hardness aluminum alloy cylinder with a diameter of 3mm.

Claims (1)

1. the twistless compound pendulum of metal ring and strip-shaped clamp groove composition, comprise fork and suspension member, it is characterized in that: the metal ring head and the tail of use external diameter 10mm, internal diameter 6mm are drawn close and formed physical pendulum fork, and annulus xsect is the circle of a diameter 2mm, and material is stainless steel or the aluminium alloy that hardness is larger; Block annulus on annulus both sides by the draw-in groove of stainless steel or high hardness aluminium alloy, all annulus all between close contact, all annulus the line of contact point all cross the center of circle of each annulus, the draw-in groove on both sides has equidistant diameter 2mm through hole, its distance is the external diameter 10mm of annulus, makes annulus be welded in the draw-in groove of the right and left at lead to the hole site by direct welding; The suspension member of physical pendulum is stainless steel or the high hardness aluminium alloy right cylinder of diameter 3mm.