Experimental counter balance

Abstract

The utility model relates to the technical field of balances, in particular to a counter balance for experiments, which comprises a balance body, trays are arranged on tray racks on two sides of the balance body, arc-shaped rails are fixedly mounted on the tray racks and positioned on the bottom sides of the trays, and the middles of the arc-shaped rails are fixed with the bottom walls of the trays through bumps. The outer wall of the tray is a hemispherical surface, the corresponding circle center of the arc-shaped rail coincides with the corresponding sphere center of the outer wall of the tray, meanwhile, a first arc-shaped plate and a second arc-shaped plate are symmetrically arranged on the portions, located on the two sides of the protruding block, of the arc-shaped rail in a sliding mode, and the first arc-shaped plate and the second arc-shaped plate are located on the left side and the right side of the tray respectively. And the first arc-shaped plate and the second arc-shaped plate are pushed to be away from the protruding block and move upwards to the lateral upper portion of the tray, and anti-falling protection is conducted on the tray in the shaking process.

Description

Technical Field

[0001] The utility model relates to the technical field of balances, in particular to a tray balance for experiments. Background Art

[0002] A tray balance is a commonly used weighing device in laboratories. When objects that are easy to roll are stacked on the tray of the tray balance, the balance will shake during the leveling process, causing the objects to roll in the tray or even roll out of the tray.

[0003] Therefore, this solution provides a tray balance for an experiment, which uses a special structural setting to make the tray have a certain object protection function. Utility Model Content

[0004] The utility model aims at least to solve the problem that the tray in the prior art lacks an anti-rolling structure.

[0005] The present invention provides a tray balance for experiments, which is achieved by the following specific technical means: comprising a balance body, trays are arranged on tray racks on both sides of the balance body, arc rails are fixedly mounted on the tray racks, the middle part of the arc rails is fixed to the bottom wall of the tray by a protrusion, the tray has an outer wall of a hemispherical surface, and at the same time, arc plates 1 and 2 are symmetrically slidably located on both sides of the protrusion on the arc rails, and when anti-drop protection is needed, arc plates 1 and 2 are pushed up to the upper side of the tray to provide anti-drop protection for the shaking tray.

[0006] Preferred technical solution 1: Sliders are fixed on both the arc plate 1 and the arc plate 2, and the two groups of sliders slide on the arc rails, forming a hemispherical cover located outside the tray when the arc plate 1 and the arc plate 2 are in contact with each other at the bottom side of the tray.

[0007] Preferred technical solution two: Notches are provided on the tops of the arc plate one and the arc plate two. When the arc plate one and the arc plate two are moved to the top of the tray and docked again to form a hemispherical cover arranged at the top of the tray, the two sets of notches dock to form a circular hole for materials to be placed in.

[0008] Preferred technical solution three: a fixed frame is fixed on the top of the arc rail and the slider, a connecting plate is rotatably installed in the fixed frame, an adjusting screw is rotatably installed on the connecting plate at the end of the arc rail, and the adjusting screw at one end of the arc rail passes through a threaded hole opened on a connecting plate of a group of sliders near the end of the arc rail.

[0009] Preferred technical solution four: a threaded column is fixed on the protrusion, and a threaded hole is opened at the center of the bottom of the tray. The tray is screwed onto the threaded column through the threaded hole to realize the detachable assembly of the protrusion and the tray.

[0010] The above structure enables this solution to have the following beneficial effects:

[0011] 1. When necessary, the arc plate 1 and the arc plate 2 can be moved from the bottom side of the pallet to the top side of the pallet to block and protect the top of the pallet, so as to prevent the easy-to-roll objects stacked in the pallet from falling during the leveling and shaking;

[0012] 2. The notches on the arc plate 1 and the arc plate 2 can first protect the top of the tray, and then use the reserved round holes to put the items in;

[0013] 3. When the arc plate 1 and the arc plate 2 are sealed at the top of the pallet, the effective load-bearing capacity of the pallet can be increased to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this scheme;

[0016] Figure 2 This is a schematic diagram of the structure of the curved track of this scheme;

[0017] Figure 3 This is a schematic diagram of the structure of the pallet of this solution;

[0018] Figure 4 This is a schematic diagram of the structure of the curved plate 1 and the curved plate 2 of this scheme;

[0019] Figure 5 This is a cross-sectional view of the tray of this solution.

[0020] Among them, 1. balance body, 101. tray rack, 2. tray, 3. arc rail, 301. protrusion, 4. arc plate 1, 5. arc plate 2, 6. slider, 7. notch, 8. fixing frame, 9. connecting plate, 10. adjusting screw, 11. threaded column. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 5The experimental tray balance comprises a balance body 1, a tray 2 is arranged on a tray rack 101 on both sides of the balance body 1, and an arc rail 3 is fixedly installed on the tray rack 101, the arc rail 3 is located on the bottom side of the tray 2, and the middle part of the arc rail 3 is fixed to the tray rack 101 through a fixed protrusion 301, and a threaded column 11 is fixed on the protrusion 301. At the same time, a threaded hole is opened at the center of the bottom of the tray 2, and the tray 2 is screwed on the threaded column 11 through the threaded hole to realize the detachable assembly of the protrusion 301 and the tray 2. The outer wall of the tray 2 is a hemispherical surface, and the corresponding center of the arc rail 3 coincides with the corresponding spherical center of the outer wall of the tray 2. At the same time, an arc plate 1 4 and an arc plate 2 5 are symmetrically slidably on both sides of the protrusion 301 on the arc rail 3, and the arc rail 3 is located at the bottom of the tray 2. On the outside of the arc plate 1 4 and the arc plate 2 5, the arc plate 1 4 and the arc plate 2 5 are respectively located on the left and right sides of the tray 2, and the inner walls of the arc plate 1 4 and the arc plate 2 5 slide against the outer wall of the tray 2 to avoid a large gap between the two. Sliders 6 are fixed on the arc plate 1 4 and the arc plate 2 5, and the two groups of sliders 6 slide on the arc rail 3. When the arc plate 1 4 and the arc plate 2 5 are docked and contacted on the bottom side of the tray 2, a hemispherical cover located on the outside of the tray 2 and surrounding the threaded column 11 is formed. At this time, the two groups of sliders 6 are respectively in contact with the two sides of the protrusion 301. When anti-drop protection is needed, the arc plate 1 4 and the arc plate 2 5 are pushed away from the protrusion 301 and moved up to the upper side of the tray 2 to prevent the shaking tray 2 from falling.

[0023] See also Figure 4 , experimental tray balance, the top of the arc plate 1 4 and the arc plate 2 5 are both provided with a notch 7, when the arc plate 1 4 and the arc plate 2 5 move to the top of the tray 2 and dock again to form a hemispherical cover arranged at the top of the tray 2, the two sets of notches 7 dock to form a round hole for materials to be placed in, which can not only protect the moving and rolling objects, but also increase the loading capacity of the tray 2. At this time, the slider 6 is located at the top of the arc rail 3.

[0024] See also Figure 2 , an experimental tray balance, a fixing frame 8 is fixed on the top of the arc rail and the slider 6, a connecting plate 9 is rotatably installed in the fixing frame 8, an adjusting screw 10 is rotatably installed on the connecting plate 9 at the end of the arc rail 3, the adjusting screw 10 located at one end of the arc rail 3 passes through a threaded hole opened on a connecting plate 9 of a group of sliders 6 near the end of the arc rail 3, and a threaded connection is realized between the adjusting screw 10 and the connecting plate 9 on the slider 6, and the position of the slider 6 on the arc rail 3 can be controlled by turning the adjusting screw 10, that is, the relative position between the arc plate 1 4 and the arc plate 2 5 and the tray 2 is controlled.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tray balance for experiment, characterized in that: The invention comprises a balance body (1), a tray (2) is arranged on a tray frame (101) on both sides of the balance body (1), an arc rail (3) is fixedly mounted on the tray frame (101), the arc rail (3) is located on the bottom side of the tray (2), the middle part of the arc rail (3) is fixed to the bottom wall of the tray (2) through a protrusion (301), the outer wall of the tray (2) is a hemispherical surface, the corresponding center of the arc rail (3) coincides with the corresponding center of the sphere of the outer wall of the tray (2), and at the same time, an arc plate 1 (4) and an arc plate 2 (5) are symmetrically slidably arranged on both sides of the protrusion (301) on the arc rail (3).

2. The experimental tray balance according to claim 1, characterized in that: The arc-shaped plate 1 (4) and the arc-shaped plate 2 (5) are respectively located on the left and right sides of the tray (2), and the arc-shaped rail (3) is located on the outer sides of the arc-shaped plate 1 (4) and the arc-shaped plate 2 (5).

3. The experimental tray balance according to claim 2, characterized in that: The inner walls of the arc-shaped plate 1 (4) and the arc-shaped plate 2 (5) slide in contact with the outer wall of the tray (2).

4. The experimental pan balance according to claim 1, characterized in that: A threaded column (11) is fixed on the protrusion (301), and a threaded hole is provided at the center of the bottom of the tray (2), and the tray (2) is screwed onto the threaded column (11) through the threaded hole.

5. The experimental tray balance according to claim 3, characterized in that: Slide blocks (6) are fixed on both the arc plate 1 (4) and the arc plate 2 (5). The two groups of slide blocks (6) slide on the arc rail (3). When the arc plate 1 (4) and the arc plate 2 (5) are in contact with each other at the bottom side of the tray (2), a hemispherical cover is formed on the outside of the tray (2); when the arc plate 1 (4) and the arc plate 2 (5) are in contact with each other at the top side of the tray (2), a hemispherical cover is formed on the upper side of the tray (2).

6. The experimental pan balance according to claim 5, characterized in that: The tops of the arc-shaped plate 1 (4) and the arc-shaped plate 2 (5) are both provided with notches (7). When the arc-shaped plate 1 (4) and the arc-shaped plate 2 (5) are moved to the top of the tray (2) and docked again to form a hemispherical cover arranged at the top of the tray (2), the two groups of notches (7) dock to form a round hole for placing articles.

7. The experimental pan balance according to claim 5, characterized in that: A fixing frame (8) is fixed on the top of the arc rail (3) and the slider (6), a connecting plate (9) is rotatably mounted in the fixing frame (8), an adjusting screw (10) is rotatably mounted on the connecting plate (9) at the end of the arc rail (3), and the adjusting screw (10) at one end of the arc rail (3) passes through a threaded hole provided on the connecting plate (9) of a group of sliders (6) close to the end of the arc rail (3).

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