Abstract

A high precision stretching force sensor has a column body (C). The middle part of the column body (C) is provided with two symmetrical blind holes (11, 12). At the length direction, the column body (C) is provided with symmetrical neck parts (21, 22) relative to the blind holes (11, 12). At the out side of the neck parts (21, 22), the column body (C) is provided with symmetrical or asymmetrical connecting parts (41-1, 41-2) relative to the blind holes (11, 12). The size of the neck parts (21, 22) is lesser than the diameter of the blind holes (11, 12) along the width direction of the column body (C). With the combination of the blind holes (11, 12) and the neck parts (21, 22), a stretching force can be transferred to the outside of the blind holes (11, 12) through the neck parts (21, 22) when the sensor is stretched. The bottom of the middle blind holes (11, 12) is stretched longitudinally and compressed transversely under the deformation of the outside thereof, thus providing an ideal stretching and compression stress distribution for a strain gauge. The above sensor has the advantages of higher sensitivity than a conventional stretching plate force sensor, which is 3mV/V or above, a low total height, a light weight, and an overload coefficient above 400%. The above sensor also accords with the C3 authentication of the OIML.

IPC Classes  ?

• G01G 3/12 - Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
• G01G 21/28 - Frames; Housings
• G01L 1/04 - Measuring force or stress, in general by measuring elastic deformation of gauges, e.g. of springs

Abstract

A pull-type weighing module comprises a pull-type sensing body (1,210), a base plate (2,220), a pressure seat, a first pin (4,420), and a second pin (5,250), wherein the first pin (4,420) is parallel with the second pin (5,250). A left bracket (21,221) and a right bracket (22,222) are set on the base plate (2,220), and the first pin (4,240) is supported on the left bracket (21,221) and the right bracket (22,222). The left bracket (21,221) and the right bracket (22,222) are provided on the left side and the right side of the sensing body (1,210) respectively. A left supporting arm (31,231) and a right supporting arm (32,232) are set on the pressure seat, and the second pin (5,250) is supported on the left supporting arm (31,231) and the right supporting arm (32,232). The left supporting arm (31,231) and the right supporting arm (32,232) are provided on the left and right side of the sensing body (1,210) respectively. A first through-hole (11,211), which the first pin (4,240) passes through, is provided on the upper part of the sensing body (1,210). A second through-hole (12,212), which the second pin (5,250) passes through, is provided on the lower part of the sensing body (1,210).

IPC Classes  ?

• G01G 21/28 - Frames; Housings
• G01G 3/00 - Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
• G01G 3/12 - Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
• G01G 21/06 - Arrangements of bearings of ball or roller bearings
• G01G 21/16 - Beams of composite construction; Connections between different beams
• G01G 21/18 - Link connections between the beam and the weigh pan

Abstract

A pull-type weighing module comprises a pull-type sensing body (1,210), a base plate (2,220), a pressure seat, a first pin (4,420), and a second pin (5,250), wherein the first pin (4,420) is parallel with the second pin (5,250). A left bracket (21,221) and a right bracket (22,222) are set on the base plate (2,220), and the first pin (4,240) is supported on the left bracket (21,221) and the right bracket (22,222). The left bracket (21,221) and the right bracket (22,222) are provided on the left side and the right side of the sensing body (1,210) respectively. A left supporting arm (31,231) and a right supporting arm (32,232) are set on the pressure seat, and the second pin (5,250) is supported on the left supporting arm (31,231) and the right supporting arm (32,232). The left supporting arm (31,231) and the right supporting arm (32,232) are provided on the left and right side of the sensing body (1,210) respectively. A first through-hole (11,211), which the first pin (4,240) passes through, is provided on the upper part of the sensing body (1,210). A second through-hole (12,212), which the second pin (5,250) passes through, is provided on the lower part of the sensing body (1,210).

IPC Classes  ?

• G01G 21/28 - Frames; Housings
• G01G 3/00 - Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances