Automatic switching device for bottom-loading balance weights

An automatic exchange and dish-loading technology, which is applied to measuring devices, instruments, weighing, etc., to achieve the effect of reducing errors, reducing labor intensity, and avoiding manual exchange of weights

CN101893473BActive Publication Date: 2012-01-25BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2012-01-25

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Abstract

The invention discloses an automatic switching device for bottom-loading balance weights. The device comprises a rotary disc rotating shaft, a balance scale pan, a rotary disc, a lug boss and a weigh beam, wherein the two ends of the rotary disc are provided with circular discs with grooves and the middle parts of the circular discs are connected through a rectangular block so as to form a symmetric structure; a cylindrical rotary disc rotating shaft capable of lifting and rotating is connected below the symmetric centre of the rotary disc; the balance scale pan is positioned below one circular disc end of the rotary disc and provided with the lug boss which passes through the grooves on the circular discs of the rotary disc; the height of the lug boss is slightly greater than the thickness of the rotary disc; and the balance scale pan is connected with the weigh beam. Because the device realizes automatic switching during the measurement, the operation such as manual switching of weights, opening and closing of a balance housing and the like are prevented and the measurement accuracy is greatly improved; and by using the balance with automatically switched weights, the number of division reaches 2*10<7>.
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Description

technical field

[0001] The invention relates to the field of mass measurement, in particular to a device for automatically exchanging weights of a dish-down balance. Background technique

[0002] The present invention is only directed to under-dish balances for mass transfer.

[0003] In the field of quality transmission, the repeatability of the balance is the most concerned, and the smaller the repeatability, the better. In the process of mass value transfer, the weight is the main standard, and the weight is a physical measuring tool subordinate to the balance. The balance is mainly used to reproduce the mass value of the weight. Therefore, the weighing performance of the balance is an important part of the mass transfer capability. With high-accuracy weights, high-accuracy balances must be matched to build high-accuracy weight standard devices.

[0004] According to the provisions of "JJG99-2006 Weight Verification Regulations", all mass transmissions adopt the subst...

Examples

Embodiment Construction

[0019] like figure 1 , 2 , Shown in 3 and 4, a kind of dish type balance weight automatic exchanging device of the present invention comprises turntable shaft 1, balance weighing pan 2, turntable 3, boss 4 and weighing beam 5. Turning disk 3 is a rectangular stainless steel symmetrical structure in the middle of the same disc at both ends. Below the center of symmetry of the turntable 3 is fixed a cylindrical stainless steel turntable shaft 1 with a smooth exterior. The lower part of the turntable shaft 1 is connected to a hydraulic drive device driven by a micro motor. Driven by the drive device, the turntable shaft 1 can slowly move up and down. Sliding, free and slow turning. Both ends of the turntable 3 are provided with seven rectangular through slots 6 of different sizes. Below a round end of the turntable 3 is a balance weighing pan 2, which is connected to an arm of the balance through a weighing beam 5. , the balance weighing pan 2 is provided with 7 bosses 4 matc...