Scale in which at least one bearing plate has a high stiffness geometric shape

Abstract

A scale includes a scale pan for supporting goods to be weighed, and upper and lower bearing plates, wherein the scale pan is arranged above an upper bearing plate, and a weighing cell is arranged between the upper bearing plate and the lower bearing plate, wherein at least three feet are attached to the lower bearing plate, which are supported on a fixed area, wherein the lower bearing plate has a U-shaped cross-section, wherein, contiguous to respective stiffened areas of the U-shaped cross-section, there is a further region, which extends in parallel to a trough bottom, wherein the trough bottom is arranged between the two stiffened areas, and the trough bottom has a trapezoidal geometry.

Claims

1. A scale, comprising a scale pan for supporting goods to be weighed, and upper and lower bearing plates, wherein the scale pan is arranged above the upper bearing plate, and a weighing cell is arranged between the upper bearing plate and the lower bearing plate, wherein at least three feet are attached to the lower bearing plate, which are supported on a fixed area, wherein the lower bearing plate has a U-shaped cross-section, wherein, contiguous to respective stiffened areas of the U-shaped cross-section, there is a further region, which extends in parallel to a trough bottom, wherein the trough bottom is arranged between the two stiffened areas, and the trough bottom has a trapezoidal geometry.

2. The scale according to claim 1, wherein the stiffened areas are bent in an axis-symmetrical manner.

3. The scale according to claim 1, wherein the stiffened areas are at an angle (α) to the trough bottom that is smaller than 90° and larger than 20°.

4. The scale according to claim 1, wherein the angle (β) between a base of the trapezoid-shaped trough bottom and at least one leg of the trapezoid-shaped trough bottom is between 40° and 87°.

5. The scale according to claim 1, wherein at least one attachment point of the weighing cell to the lower bearing plate is arranged near a shorter base of the trapezoidal trough bottom.

6. The scale according to claim 5, wherein the distances from the corner regions, which are arranged at an end of the upper bearing plate and/or the lower bearing plate, which are situated on the side of the shorter base of the trapezoidal trough bottom, to the respective stiffened area that is arranged closer to the respective corner region are larger than the distances between the corner regions that are situated at an opposite end of the upper bearing plate and/or lower bearing plate and the respective closest stiffened area.

7. The scale according to claim 5, wherein the lower bearing plate has the same geometry as the upper bearing plate, wherein the shorter base of the trough bottom of the upper bearing plate and the shorter base of the trough bottom of the lower bearing plate are arranged to face in opposite directions.

8. The scale according to claim 7, wherein at least one attachment point of the weighing cell to the upper bearing plate is arranged near the shorter base of the trapezoidal trough bottom.

9. The scale according to claim 1, wherein a load receiver of the weighing cell is connected to the upper bearing plate in an eccentric fashion.

10. The scale according to claim 1, wherein a mechanical ground of the weighing cell is connected to the lower bearing plate in an eccentric fashion.

11. The scale according to claim 1, wherein dampening load receiving elements between the scale pan and the upper bearing plate are arranged at least at all four corner regions of the upper bearing plate.

12. The scale according to claim 11, wherein the load receiving elements are electrostatically dissipating.

13. The scale according to claim 1, wherein the upper bearing plate and/or the lower bearing plate are formed of the same material.

14. The scale according to claim 1, wherein at least two overload stops are arranged between the upper bearing plate and the lower bearing plate.

15. The scale according to claim 14, wherein the overload stops comprise a stud bolt including an external thread at least at one end and having both ends covered by a domed nut.

16. The scale according to claim 1, wherein the feet have a decagonal geometry.

17. The scale according to claim 2, wherein the stiffened areas are at an angle (α) to the trough bottom that is smaller than 90° and larger than 20°.

18. The scale according to claim 2, wherein the angle (β) between a base of the trapezoid-shaped trough bottom and at least one leg of the trapezoid-shaped trough bottom is between 40° and 87°.

19. The scale according to claim 6, wherein the lower bearing plate has the same geometry as the upper bearing plate, wherein the shorter base of the trough bottom of the upper bearing plate and the shorter base of the trough bottom of the lower bearing plate are arranged to face in opposite directions.

20. The scale according to claim 19, wherein at least one attachment point of the weighing cell to the upper bearing plate is arranged near the shorter base of the trapezoidal trough bottom.

Description

SHORT DESCRIPTION OF THE DRAWINGS

(1) Further advantageous aspects can be derived from the following description of preferred exemplary embodiments with reference to the drawings, wherein:

(2) FIG. 1 schematically shows the scale;

(3) FIG. 2 also schematically shows the scale; and

(4) FIG. 3 shows the scale fitted with a load pan.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

(5) FIG. 1 shows a scale 1, comprising an upper bearing plate 2 and a lower bearing plate 3, at least three feet 4 and at least two overload stops 5. Furthermore, a circular spirit level 6 is arranged at the lower bearing plate 3. The scale pad 28 is not shown in FIG. 1.

(6) The upper bearing plate 2 has a U-shaped cross-section, wherein the legs 7 of the U-shaped cross-section form stiffened areas 7, wherein, to each of these stiffened areas 7, a further region 8 is contiguous, which extends in parallel to the trough bottom 9, wherein the trough bottom 9 is arranged between the two stiffened areas 7 and the trough bottom 9 has a trapezoidal geometry, wherein the trapezoidal geometry is preferably an isosceles trapezoid. The stiffened areas 7 are bent in an axis-symmetrical fashion. The stiffened areas 7 are at an angle α to the trough bottom 9 that is smaller than 90° and larger than 20°. Furthermore, the angle β between a base 12, 14, 25 of the trapezoid-shaped trough bottom 9 and at least one leg 27 of the trapezoid-shaped trough bottom 9 is between 40° and 87°, preferably between 60° and 87°, particularly preferably between 75° and 87°.

(7) The attachment points 10, or the attachment screws 10 of the weighing cell 11 to the upper bearing plate 2 are arranged near a shorter base 12 of the trapezoidal trough bottom 9. The attachment points 10 for the load receiver 13 of the weighing cell 11 are therefore eccentrically connected to the upper bearing plate 2.

(8) The lower bearing plate 3 has the same geometry and the same cross-section as the upper bearing plate 2, wherein the shorter base 12 of the trough bottom 9 of the upper bearing plate 2 and a shorter base 14 of the trough bottom 15 of the lower bearing plate 3 face in opposite directions, or the lower bearing plate 3 is assembled in an alignment that is rotated by 180°. The attachment points 10 for the load receiver 13 and for the mechanical ground 16 are thus arranged at the same position on each of the trough bottoms 9, 15. The attachment points 10 of the mechanical ground 16 to the lower bearing plate 3 are thus arranged near the shorter base 14 of the trapezoidal trough bottom 15 of the lower bearing plate 3.

(9) The feet 4 have a decagonal geometry and are attached to the lower bearing plate 3. The feet comprise a stud bolt which is passed through a through hole and/or threaded in a threaded hole in the lower bearing plate 3. Subsequently, the end of the stud bolt, which was threaded, in particular, through the through hole, is covered by an optional domed nut 24. The end of the stud bolt and the domed nut 24 are therefore on an upper surface of the lower bearing plate 3.

(10) The upper bearing plate 2 and the lower bearing plate 3 each have four corner regions 20-23, wherein two front corner regions 20, 21 are on the same line as the shorter base 12 of the trapezoidal trough bottom 9 of the upper bearing plate 2, and as the shorter base 14 of the trapezoidal trough bottom 15 of the lower bearing plate 3, respectively, and two back corner regions 22, 23, which are on the same line as the longer base 25 of the trapezoidal trough bottom 9, 15 of the upper bearing plate 2 and the lower bearing plate 3, respectively. The distance between the front corner regions 20, 21 and the respective stiffened areas 7 that are closer to the front corner regions 20, 21, is larger than the distance between the back corner regions 22, 23, which are arranged at an opposite end, or on the same line as the longer base 25 of the trapezoidal trough bottom 9, 15 of the upper bearing plate 2 and/or the lower bearing plate 3, respectively, and the respective stiffened area 7.

(11) Additionally, at the four corner regions 20-23 of the upper bearing plate 2, indentations 26 are provided, at which dampening load receiving elements can be arranged. Preferably the load receiving elements are electrostatically dissipating.

(12) Furthermore, the angle γ between the stiffened area 7 and an imaginary line extending between the at least one of the attachment points 10 and the back corner region 23, is between 5° and 50°, preferably between 10° and 40°, particularly preferably between 15° and 35°. In particular, the imaginary line extends to the center point of the corner region 23.

(13) FIG. 2 shows a further schematic representation of the scale 1, wherein the weighing cell 11, the overload stops 5 and the upper bearing plate 2 and the lower bearing plate 3 are shown. Furthermore, it can be seen that the load receiver 13 is eccentrically attached to the upper bearing plate 2, and the mechanical ground 16 is also eccentrically attached to the lower bearing plate 3, and each of the attachment points 10 is arranged near the shorter base 12, 14.

(14) The four overload stops 5 are arranged between the upper bearing plate 2 and the lower bearing plate 3. They comprise a stud bolt 17 threaded into the lower bearing plate 3 and a domed nut 18 arranged on each end of the stud bolt 17. The stud bolt 17 only has an external thread at both ends. The middle region of the stud bolt 17 is not provided with a thread. Furthermore, below the top domed nut 18, a locking nut 19 is arranged, which is only partially provided with an internal thread.

(15) FIG. 3 shows the scale 1 in the assembled state provided with the scale pan 28. The feet 4 and the lower bearing plate 3, in particular the trough bottom 15 of the lower bearing plate 3, are not fully hidden by the scale pan 28.

List of Reference Numerals

(16) 1 scale

(17) 2 upper bearing plate

(18) 3 lower bearing plate

(19) 4 foot

(20) 5 overload stop

(21) 6 circular spirit level

(22) 7 leg/stiffened area

(23) 8 further region

(24) 9 trough bottom of upper bearing plate

(25) 10 attachment point

(26) 11 weighing cell

(27) 12 shorter base of upper bearing plate

(28) 13 load receiver

(29) 14 shorter base of lower bearing plate

(30) 15 trough bottom of lower bearing plate

(31) 16 mechanical ground

(32) 17 stud bolt

(33) 18 domed nut of overload stop

(34) 19 locking nut

(35) 20 front corner region

(36) 21 front corner region

(37) 22 back corner region

(38) 23 back corner region

(39) 24 domed nut of foot

(40) 25 longer base

(41) 26 indentation

(42) 27 leg of the trapezoid-shaped trough bottom

(43) 28 scale pan