Test system for testing durability of weighing apparatus
A test system and durability technology, applied in the direction of weighing equipment testing/calibration, etc., can solve the problems of low test accuracy and inaccurate loading, etc., to save test time, ensure accuracy, and improve work efficiency.
Inactive Publication Date: 2011-06-22
NAT INST OF METROLOGY CHINA
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Problems solved by technology
[0004] In order to solve the technical problems of low test accuracy and inaccurate loading in the prior art, the present invention develops a test system for testing the durability of weighing instruments
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[0034] In the specific implementation process, such as Figure 1-3As shown, a 1.5*1.5m, 20mm thick 304 stainless steel plate 20 is used, and the four corners are fixed by anchor bolts. There are four 1.2m high vertical support rods 11 on both sides of the steel plate 20, and the upper ends of the support rods 11 are square beams 12 , there are two short vertical support rods on the same two sides as the vertical support rods 11 on the crossbeam 12, respectively grafted by short support rods 13 on the support rods, and a bearing seat 7 is respectively arranged on the two short support rods 13 on both sides, The loading frame 5 is above the short support rod 13 , and the two shaft rods 6 at both ends of the loading frame 5 pass through the bearings, and the bearing frame is on the bearing seat 7 of the short support rod 13 .
[0035] The other two sides of the loading frame 5 are respectively connected to two loading connecting rods 9, each of the lower ends of the loading conne...
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The invention relates to a weighing apparatus durability test machine for testing the durability of a weighing apparatus, which comprises: a motor, a support frame, a reduction unit, loading connecting rods, a variable frequency control device, a loading frame, a linear bearing and a weight support. A rigid bottom plate is fixedly connected to the ground and is provided with the support frame thereon, two axles at both ends of the loading frame penetrate through the bearing, and a bearing rack is positioned on the bearing support on the support frame. Two sides of the loading frame are provided with loading connecting rods, the lower end of each of which is rigidly connected with the weight support, the rigid bottom plate is provided with an alternating servo motor thereon which drives a crank link mechanism to further drive the loading frame to move, and the variable frequency control device is electrically connected with the alternating servo motor. The system can accurately place the weights at target area and has the advantages of high precision of adjusting loading speed, good shock absorption effect, small load impact on loader and precise testing result, multi-station test can be realized with only one apparatus, in addition, the system can also adapt to the measurement demands of the weighing apparatus with different thicknesses and simultaneously achieves small floor area and low cost.
Description
technical field [0001] The invention belongs to the field of weighing instruments measurement, and in particular relates to a test system for testing the durability of weighing instruments, especially for weighing instruments of class II, III, and IV whose weighing range is below 100 kg in the existing type evaluation tests of weighing instruments Durability testing machine used for durability test. Background technique [0002] In the prior art, a conventional durability testing machine is composed of a motor, a belt, a pulley, a wire rope, a sandbag and a crank linkage mechanism. Among them, the sandbag plays the role of replacing the physical weight. In actual work, the motor rotates to drive the pulley, pulls the wire, and drives the sandbag to move vertically up and down. The sandbag repeatedly falls on the weighing device carrier, realizing the test of the durability of the weighing device. However, since sandbags are used instead of weights, and it is not allowed to ...
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IPC IPC(8): G01G23/01
Inventor 王健钟瑞麟蔡常青姚弘丁京鞍张跃张强
Owner NAT INST OF METROLOGY CHINA