CN201241148Y - Automatic positioning and clamping mechanism of culture dish - Google Patents

Abstract

The utility model relates to a Culture dish automatic positioning and clamping mechanism. At present, a culture dish filled with chemical reagent is generally placed at a central position of an experimental platform manually and is lightly clamped. The automatic positioning and clamping mechanism comprises a central gear and three satellite gears that are meshed with the central gear and are in uniformly-spaced distribution along the circumference of the central gear. A bearing disk is arranged above the central gear and the satellite gears, chutes are disposed on the disk face corresponding to the satellite gears, and clamp pins respectively penetrate through the chutes. The clamp pins are respectively vertically fixed at corresponding eccentric positions of the satellite gears. One end of a locating spring is fixed on a gantry, and the other end thereof is fixed at the eccentric position of the central gear. The utility model realizes centralized positioning through the four gears and the clamp pins, and has advantages of simple structure, convenient use and easy realization. A glass ware can be clamped under the function of the locating spring, and will not be crushed easily.

Description

Petri dish automatic positioning and clamping mechanism

technical field

The utility model belongs to the technical field of biochemical instruments and scientific instruments, in particular to an automatic positioning and clamping mechanism for a culture dish.

Background technique

In all kinds of biochemical instruments and scientific instruments, it is often necessary to place some glass petri dishes filled with chemical reagents on a certain center position on the experimental platform and gently clamp them. Then perform various possible rotations, reagent loading, etc. Glassware will vary in diameter. At this time, it is required that the central position of the containers with different diameters remains unchanged, and that they can be gently clamped, so as not to crush the containers, but also to prevent them from sliding or falling off.

Because it is used in biochemical instruments or scientific instruments, the device is required to be simple and easy to use, which can realize automatic operation by motor or manual operation by manual operation.

Contents of the invention

The purpose of the utility model is to provide a device for automatic centering and light card positioning of circular petri dishes in various biochemical instruments and scientific instruments.

The utility model comprises a central gear and three satellite gears engaged with the central gear, and the three satellite gears are distributed at equal intervals along the circumference of the central gear. The center of the sun gear is connected with the platform through the central shaft, and the satellite gear is connected with the platform through the rotating shaft. The carrying disk is arranged above the central gear and the satellite gear, and its center is connected with the central shaft. There are three slide slots corresponding to the positions of the three satellite gears on the surface of the bearing disc, and the three bayonet pins pass through the three slide slots respectively, and the three bayonet pins are respectively movably sleeved with ferrule sleeves. The three bayonet pins are vertically fixed on the three corresponding satellite gears respectively, and are arranged eccentrically on the satellite gears, with the same distance from the center of circle of the corresponding satellite gears. One end of the positioning spring is fixed on the stand, and the other end is fixed on the eccentric position of the sun gear.

The utility model constitutes center positioning through four gears and bayonet pins, has simple structure, is convenient to use, and is easy to realize. And the Petri dish is firmly clamped by the action of the positioning spring, so it is not easy to crush.

Description of drawings

Fig. 1 is the structure schematic diagram of looking up of the utility model;

Fig. 2 is a schematic diagram of the top view structure of the utility model.

Detailed ways

As shown in FIGS. 1 and 2 , the culture dish automatic positioning and clamping mechanism includes a central gear 5 and three satellite gears 2 meshing with the central gear 5 . The two ends of positioning spring 1 are fixed on the circumference of stand and sun gear 5 respectively. Three satellite gears 2 are distributed at equal intervals along the circumference of the central gear 5, and the connecting line between their centers is an equilateral triangle. The center of the central gear 5 is connected with the platform through the central axis 4, and can rotate freely around the central axis 4; the satellite gear 2 is connected with the platform through the rotating shaft 3, and can freely rotate around the rotating axis 3. The carrying disk 6 is arranged above the central gear 5 and the satellite gear 2 , and its center is connected with the central shaft 4 and can rotate around the central shaft 4 . There are three chutes 8 on the surface of the carrying disc 6 corresponding to the positions of the three satellite gears 2, and the three bayonet pins 7 are set through the three chute 8 respectively. Move in a centripetal or centrifugal direction. The three bayonet pins 7 are respectively movably sleeved with ferrules 9, and the ferrule 9 can rotate freely outside the bayonet pins 7 to reduce the friction when the bayonet pins 7 move in the chute 8. The three bayonet pins 7 are respectively fixed vertically on the three corresponding satellite gears 2 , and are arranged eccentrically on the satellite gears 2 , and have the same distance from the center of circle of the corresponding satellite gears 2 .

When placing a round petri dish, pull one bayonet outward, the corresponding satellite gear drives the central gear to rotate, and then drives the other two satellite gears to rotate synchronously, so that the three bayonets move outwards at the same time, and the three bayonets position expanded. After the culture dish is placed, loosen the bayonet, and under the action of the positioning spring, the center gear will do a reset rotation, driving the three satellite gears to rotate in the opposite direction, so that the three bayonets will be retracted towards the center of the carrying disc, and the center gear will be placed on the carrying disk. The circular petri dish on the disc is stuck in the center of the carrying disc to complete the positioning and clamping of the petri dish.

Claims (1)

1, the automatic positioning and clamping of culture dish mechanism, comprise a sun-wheel and three satellite gears that mesh with sun-wheel, three satellite gears are spacedly distributed along the circumference of sun-wheel, the center of sun-wheel is connected with stand by central shaft, satellite gear is connected with stand by rotating shaft, it is characterized in that: the carrying disk is arranged on sun-wheel and satellite gear top, and its center is connected with central shaft; Corresponding three satellite gear positions have three chutes on the card of carrying disk, and three bayonet locks pass three chute settings respectively, three bayonet locks outward respectively movable sleeve be equipped with cutting ferrule; Described three bayonet locks are vertically fixed on respectively on the satellite gear of three correspondences, and on satellite gear eccentric the setting, its distance with the center of circle of corresponding satellite gear is identical; One end of retainer spring is fixed on the stand, and the other end is fixed on the eccentric position of sun-wheel.

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