阅读说明：本技术 载荷元件 (Load cell ) 是由 拉斐尔·冈萨雷斯·盖乐葛斯 于 2018-02-20 设计创作，主要内容包括：一种载荷元件,其是从悬挂带状电缆上可拆卸的,并承受因悬挂负载而产生的拉力,包括：具有矩形平行六面体配置的元件主体(12),其中元件主体(12)的长度大于宽度；至少一个第一突片(13)、第二突片(14)和第三突片(15),其从元件主体(12)的长纵向边缘突出,并且被配置为与悬挂带状电缆机械耦合；和至少一个应变计,其被配置为设置在元件主体(12)的长边的中间区域(18,19)的上方；使得第一突片(13)、第二突片(14)和第三突片(15)沿着元件主体(12)的长纵向边缘均匀分布,并且第一突片(13)和第三突片(15)位于平行于元件主体(12)的长纵向边缘的远端平面上；第一突片(13)和第三突片(15)具有突起(16),其防止元件从带状电缆移位或脱离。(A load cell that is removable from a suspension ribbon cable and that is subject to tension forces resulting from a suspended load, comprising: an element body (12) having a rectangular parallelepiped configuration, wherein the length of the element body (12) is greater than the width; at least one first tab (13), second tab (14) and third tab (15) protruding from a long longitudinal edge of the element body (12) and configured to mechanically couple with a hanging ribbon cable; and at least one strain gauge configured to be disposed above a middle region (18, 19) of the long side of the element main body (12); such that the first tab (13), the second tab (14) and the third tab (15) are evenly distributed along the long longitudinal edge of the element body (12) and the first tab (13) and the third tab (15) lie on a distal plane parallel to the long longitudinal edge of the element body (12); the first tab (13) and the third tab (15) have a protrusion (16) which prevents the element from being displaced or detached from the ribbon cable.)

1. A load cell which is detachable from a suspension flat cable and which receives a tensile force due to a suspension load; characterized in that the load element comprises: an element body (12) having a rectangular parallelepiped configuration, wherein the length of the element body (12) is greater than the width; at least one first tab (13), second tab (14) and third tab (15) protruding from a long longitudinal edge of the element body (12) and configured to mechanically couple with the hanging ribbon cable; and at least one strain gauge configured to be located above a middle region (18, 19) of a long side of the element body (12) such that the first, second and third tabs (13, 14, 15) are evenly distributed along the long longitudinal edge of the element body (12) and the first and third tabs (13, 15) are located on a distal plane parallel to the long longitudinal edge of the element body (12).

2. The element according to claim 1, characterized in that said second tab (14) protrudes from the same long longitudinal edge of said element body (12).

3. The element according to claim 1, characterized in that said first tab (13) and said third tab (15) protrude from a short transverse end edge of said element body (12).

4. The element according to claim 1, characterized in that said first tab (13), said second tab (14) and said third tab (15) are staggered along said long longitudinal edges of said element body (12).

5. The element according to claim 1, characterized in that said element body (12) is made in one piece with said first tab (13), said second tab (14) and said third tab (15) and has a configuration that can be performed with thin flat sheet metal.

6. An element according to claim 5, characterized in that the load element (11) has a right angleE shape.

7. The element according to claim 1, characterized in that the middle region (18, 19) of the long side of the element body (12) is located between the first tab (13), the second tab (14) or the third tab (15) and the second tab (14).

8. The element according to claim 1, characterized in that said first tab (13) and said third tab (15) comprise respective retaining projections (16, 17) to prevent the load element (11) from moving out of the working position.

9. The element according to claim 8, characterized in that said retaining projections (16, 17) are located in the inner corners of said first tab (13) and said third tab (15) close to said second tab (14).

10. Element according to claim 9, characterized in that the retaining projections (16, 17) have a hook shape, extending in a plane parallel to the long sides of the element body (12).

11. The element according to claim 9, characterized in that the retaining projections (16, 17) are shaped like tabs bent parallel to the long sides of the element body (12) in or outside the long sides.

Technical Field

The invention relates to a load cell for a suspension ribbon cable of a component which is subjected to a load of the type generated by a car of a hoisting device for objects or persons.

Background

Load elements for suspension cables of lifting devices, such as elevators, freight elevators, etc., which are usually used for lifting persons, objects, loads individually or simultaneously, are well known in the art.

The load cell includes: an element body having a rectangular parallelepiped shape and having at least three through holes respectively spaced from a longitudinal axis of the body; at least three rods, such that each rod is inserted into a respective hole; and a cavity in which a strain gauge is disposed.

The rods are cylindrical so that the distal ends protrude from the upper longitudinal surface of the parallelepiped and the other ends are flush with the lower side of the body, the rods being staggered with respect to the longitudinal axis of the body from which they protrude or project.

A load cell is a device mechanically connected to each suspension member of the hoisting car, i.e. to the suspension cables to constantly measure the load each suspension cable is subjected to during normal car operation.

The tension variations of the suspension cable are transmitted to the element body through the cylindrical rod, and the strain gauges convert the measured deformations into electrical signals that are transmitted to the control component, providing a warning or alarm signal in response to the electrical signals received when the total load in the car exceeds a predetermined threshold.

Disclosure of Invention

The present invention aims to solve one or more of the drawbacks encountered in practice by means of a load cell as defined in the claims.

A load cell removable from the suspension ribbon cable that is subject to stress from the suspension load; the method comprises the following steps: a rectangular parallelepiped-configured element body, the length of the element body itself being greater than the width; at least one first, second and third tab projecting from the long longitudinal edge of the element body and configured to mechanically engage the ribbon cable; and at least one strain gauge configured to be placed in the element body such that the first, second and third tabs are evenly distributed along the long longitudinal edge of the element body, the first and third tabs lying in a distal plane parallel to the long longitudinal edge of the element body without coinciding with the same long longitudinal edge of the element body.

The strain gauge is provided in an intermediate region of one of the long sides of the element main body between the first tab and the second tab or between the third tab and the second tab.

The load cell is manufactured in one piece and has a construction that can be performed with thin flat sheet metal. The load member is made from a single piece of sheet metal that is bent such that the member body forms a 90 ° angle with the first, second and third tabs. Thus, the load cell has an E-shape at right angles ".

The first tab, the second tab, and the third tab are evenly distributed along the longitudinal edge of the member body. The first and third tabs occupy positions close to the short transverse edge of the element body, and furthermore the first and third tabs are arranged according to a distal plane parallel to the long longitudinal edge of the element body, and not aligned with the proximal plane of the long longitudinal edge of the element body of the second tab, i.e. the first, second and third tabs are staggered along the long longitudinal edge of the element body.

The first and third tabs each include a retention projection to prevent movement of the load element from its operating position, the retention projections being secured to the suspension ribbon cable to ensure wire integrity of the strain gage. The flat cable is located between the element body and the holding projection.

The retaining protrusions are located on distal inside corners of the first and third tabs, respectively.

Drawings

A more detailed explanation of the device according to an embodiment of the invention is given in the following description based on the accompanying drawings, in which:

fig. 1 is a side view of a load cell.

Fig. 2 is a perspective view of a load cell.

Fig. 3 is another perspective view of the load cell.

Fig. 4 is a plan view of the load cell.

Fig. 5 is another side view of the load cell.

Fig. 6 is a profile view of a load cell.

Detailed Description

With reference to fig. 1 to 6, which show a load cell 11 detachable from a ribbon cable, which is subjected to a tensile force caused by a suspended load of the type generated by a car of a hoisting device for objects or persons, the load cell 11 comprises: an element body 12 having a rectangular parallelepiped configuration, wherein the length of the element body 12 is greater than the width; at least one first tab 13, second tab 14 and third tab 15 protruding from the long longitudinal edge of the element body 12 and configured to mechanically couple with a hanging ribbon cable; and at least one strain gauge configured to be located over a middle region 18, 19 of the long side of the element body 12 between the second tab 14 and the tab 13, 15 located on one of the short transverse edges; so that the load element 11 can be detached from the suspension cable which is subjected to the tensile forces generated by the type of suspension load generated by the car of the hoisting device of the object or person.

The first tab 13, the second tab 14 and the third tab 15 are evenly distributed along the long longitudinal edge of the element body 12; the first tab 13 and the third tab 15 occupy a position close to the short transverse edge of the element body 12, and moreover the first tab 13 and the third tab 15 are arranged according to a distal plane parallel to the long longitudinal edge of the element body 12, and not aligned with the proximal plane of the long longitudinal edge of the element body 12 of the second tab 14. That is, the first tab 13, the second tab 14, and the third tab 15 are staggered along the longitudinal edge of the element body 12.

The first tab 13 and the third tab 15 comprise a retaining projection 16, 17, respectively, to prevent the load member 11 from being accidentally moved out of the working position, i.e. the retaining projections 16, 17 are fixed to the suspension cable such that the suspension ribbon cable is located between the member body 12 and the retaining projections 16, 17 of the first and third tabs 13.

The retaining projections 16, 17 are located on the inner corners of the first tab 13 and the third tab 15, respectively, adjacent to the second tab 14. Alternatively, they may be moved away from each other and outwardly.

Alternatively, the holding projections 16, 17 have a hook shape extending in a plane parallel to the long sides of the element main body 12; that is, the holding projections 16, 17 are

Shaped and having tabs extending parallel to the long sides of the element body 12.

The load member 11 is made in one piece and has a configuration that can be performed from a single thin flat sheet of metal, which is bent so that the member body 12 forms an angle of 90 ° with the first tab 13, the second tab 14 and the third tab 15, wherein the first tab 13 and the third tab 15 are located at opposite ends of the long longitudinal edge of the member body 12, and the second tab 14 is located between the first tab 13 and the third tab 15 in the central region of the long longitudinal edge of the member body 12.

Thus, the load cell has an E-shape at right angles ", with the first tab 13, the second tab 14 and the third tab 15 being disposed along the long longitudinal edges of the cell body 12 to form right angles.

The element body 12 may include at least two intermediate regions 19, 18 where strain gauges are located; the intermediate areas 19, 18 are located on the long sides of the element body 12 between the first tab 13 and the second tab 14 or the third tab 15 and the second tab 14, so that the strain gauges are oriented perpendicularly to the first tab 13, the second tab 14 and the third tab 15, wherein the tabs 13, 14, 15 provide three support points for the suspension ribbon cable, through which changes in the tension of the suspension ribbon cable are transmitted to the element body 12 for measurement.

The load element 11 can be detached from the suspension cable so that the load element 11 in its working position protects the suspension cable between the inner sides of the first and third tabs 13, 15 and the outer side of the second tab, slightly deforming the suspension flat cable (which forms an angle different from 180 °), so that when a pulling force is applied to the suspension flat cable or a load is placed in the hoisting car, this causes the element body 12 to deform slightly and the suspension cable tends to form an angle of 180 ° (in side view).

In the operative position of the load cell 11, the retaining projections 16, 17 mechanically work with the cell body 11 to retain the suspension ribbon cable between the three tabs 13, 14, 15; the suspension ribbon cable is guided perpendicular to the long side of the element body 12.

The length of the three tabs 13, 14, 15 is thus similar to the width of the suspension ribbon cable, wherein the tabs 13 and 15 extend through the protrusions to prevent the load element 11 from moving along the suspension ribbon cable during operation of the hoisting car.

A strain gauge may be mounted on the element body 12 and may be configured to measure deformation of the element body 12 between each tab 13, 14, 15.

The size and material of the load cell 11 is selected to provide maximum bending of the load cell body 12 in accordance with the tension of the suspended ribbon cable, but also to provide sufficient strength to ensure the physical integrity of the load cell 11.