Weighing device with multiple weighing sensors

Patent metadata

Field	Value
Publication number	US-11054299-B2
Application number	US-201916456786-A
Country	US
Kind code	B2
Filing date	Jun 28, 2019
Priority date	Jun 29, 2018
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

A weighing device (1) has a load-bearing portion (10) that supports an object being weighed, a plurality of transition portions (20), and a separation portion (30). The transition portions are positioned on the separation portion, and the load-bearing portion is positioned on the transition portions, with the transition portions connected to the load-bearing portion and the separation portion. A plurality of weighing sensors (40) are provided at a bottom of the separation portion. A support portion (50) is below the weighing sensors to provide support therefor. The weighing device simplifies the loading condition of weighing sensors and isolates the horizontal mechanical deformation/distortion of the weighing load-bearing mechanism. It also reduces the influence of mechanical deformation/distortion, thereby improving the weighing performance and the effectiveness of the weighing device.

First claim

What is claimed is:

1. A device for weighing an object, comprising:
a load-bearing portion to support an object being weighed;
a support portion;
a plurality of weighing sensors, supported by the support portion;
a separation portion, positioned to bear upon the plurality of weighing sensors; and
a plurality of transition portions, located between, and connected to, both the load bearing portion and the separation portion.

2. The device of claim 1 , wherein there are at least three weighing sensors.

3. The device of claim 1 , wherein the transition portions are made of an elastic material.

4. The device of claim 1 , wherein the transition portions are fixedly connected to the load-bearing portion and the separation portion.

5. The device of claim 1 , wherein the transition portions are configured as a movable mechanism comprising:
an upper movable portion that is fixedly connected to a bottom of the load-bearing portion, with a lower end surface of the upper movable portion comprising a concave surface; and
a lower movable portion that is fixedly connected to a top of the separation portion, with an upper end surface of the lower movable portion comprising a spherical surface, with the spherical surface matched with the concave surface are matched with each other, so that a relative motion between the load-bearing portion and the separation portion is formed by means of the upper movable portion and the lower movable portion through a relative motion between the spherical surface and the concave surface.

6. The device of claim 1 , wherein the transition portions are configured as a movable mechanism comprising:
an upper connection portion that is fixedly connected to a bottom of the load-bearing portion;
a lower connection portion that is fixedly connected to a top of the separation portion; and
a movable portion that is interposed between the upper connection portion and the lower connection portion, and the movable portion being in a rolling connection with each of the upper and lower connection portions, establishing a relative movement between the load-bearing portion and the separation portion.

7. The device of claim 6 , wherein:
a first groove is provided on a lower end surface of the upper connection portion; a second groove is provided on an upper end surface of the lower connection portion; and
the movable portion is configured as a first cylinder having upper and lower end surfaces are first arc-shaped surfaces that correspond to the respective first and second grooves.

8. The device of claim 6 , wherein:
a first arc-shaped groove is provided on a lower end surface of the upper connection portion;
a first flat surface is provided on an upper end surface of the lower connection portion; and
the movable portion is configured as a second cylinder, an upper end surface of which is configured to be a second arc-shaped surface and a lower end surface of which is configured to be a second flat surface, so that the second arc-shaped surface correspondingly matches the first arc-shaped groove, and the second flat surface correspondingly matches the first flat surface.

9. The device of claim 6 , wherein:
an inner second arc-shaped groove is provided on a lower end surface of the upper connection portion;
a third arc-shaped groove is provided on an upper end surface of the lower connection portion; and
the movable portion is configured as a spherical body, so that the spherical body correspondingly matches the inner second arc-shaped groove and the third arc-shaped groove.

10. The device of claim 1 , wherein the separation portion is polygonal.

11. The device of claim 1 , wherein the separation portion is circular, and the plurality of transition portions are evenly distributed on the separation portion near an outer edge thereof.

12. The device of claim 1 , wherein the transition portions are located above stress points of the weighing sensors.

13. The device of claim 1 , wherein the separation portion is of a hollow frame structure.

14. The device of claim 13 , wherein each side of the frame structure is provided with an inwardly-recessed curved portion.

15. The device of claim 2 , wherein the transition portions are fixedly connected to the load-bearing portion and the separation portion.

16. The device of claim 2 , wherein the transition portions are configured as a movable mechanism comprising:
an upper movable portion that is fixedly connected to a bottom of the load-bearing portion, with a lower end surface of the upper movable portion comprising a concave surface; and
a lower movable portion that is fixedly connected to a top of the separation portion, with an upper end surface of the lower movable portion comprising a spherical surface, with the spherical surface matched with the concave surface are matched with each other, so that a relative motion between the load-bearing portion and the separation portion is formed by means of the upper movable portion and the lower movable portion through a relative motion between the spherical surface and the concave surface.

17. The device of claim 2 , wherein the transition portions are configured as a movable mechanism comprising:
an upper connection portion that is fixedly connected to a bottom of the load-bearing portion;
a lower connection portion that is fixedly connected to a top of the separation portion; and
a movable portion that is interposed between the upper connection portion and the lower connection portion, and the movable portion being in a rolling connection with each of the upper and lower connection portions, establishing a relative movement between the load-bearing portion and the separation portion.

18. The device of claim 2 , wherein the transition portions are located above stress points of the weighing sensors.

Assignees

• Mettler Toledo Changzhou Prec Instruments Co Ltd
• Mettler Toledo Changzhou Measurement Tech Co Ltd
• Mettler Toledo Int Trading Shanghai Co Ltd

Inventors

• Shenhui Wang
• Dengyou Chen
• Song Zhang
• Qin Sun

Classifications

• G01G21/23 Primary

  Support or suspension of weighing platforms (G01G21/24 takes precedence) · CPC title

• G01G21/02

  Arrangements of bearings (bearings per se F16C) · CPC title

• G01G21/28

  Frames, Housings · CPC title

• G01G23/005 Primary

  Means for preventing overload · CPC title