JPH10227681A - Bearing with load cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rationalize installation of a load cell to measure a load applied to a machine or the like. SOLUTION: A load cell mounting hole 3 is opened at a lower center of a bearing hole 2 of a bearing body 1. A arc-like groove 6 is opened via a predetermined thickness part 5 along a lower half of the hole 2. A suspending groove 7 is connected to a lower part of the groove 6 via the hole 3. A load cell 4 is set to a load cell mounting hole wall. And, the hole 3 is opened at the lower center in parallel with the hole 1 of the body 1, and the cell 4 is set to the hole 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine for handling heavy objects, and more particularly to a bearing with a load cell for detecting a load of the heavy object at a bearing portion.

[0002]

2. Description of the Related Art Conventionally, when a load applied to a shaft is measured by a bearing, a structure in which a load cell is interposed between the bearing and a base plate has been generally used.

[0003]

In the above-mentioned conventional structure, practical demands could be solved. However, when a load cell is interposed between a bearing and a base plate, a full load is applied to the load cell. Large, and at least 4 per bearing
Load cells were required. In addition, since the measurement conditions are different depending on the shape of the bearing, the flatness of the load cell, the nature of the load, and the like, there is a possibility that the measurement accuracy may be reduced unless the correction is made individually.

[0004] In the case of a crane, the club frame has a two-story structure, and four load cells are interposed therebetween to detect the load. Therefore, the installation height of the crane increases, and construction costs and other costs increase. Not only costs much but also the load cell head may be damaged.

[0005]

However, according to the present invention, since the load cell is incorporated in the bearing, the load cell can be reduced in size and the installation place can be unified, thereby solving the above-mentioned conventional problems.

That is, according to the present invention, a load cell mounting hole is formed at the center lower portion of the bearing hole of the bearing body,
An arc-shaped groove is formed along the lower half of the bearing hole and through a predetermined thick portion, and a drooping groove is continuously formed below the arc-shaped groove with the load cell mounting hole interposed therebetween. A bearing with a load cell, wherein a load cell is set on a hole wall. Further, the load cell is characterized in that a plurality of the load cells are adhered to the upper portion of the inner wall of the mounting hole, and on both side walls at the center of the bearing hole, the upper end of the arc-shaped groove and a predetermined thick portion, A horizontal groove is formed in a direction parallel to the horizontal axis of the bearing hole.

Another aspect of the present invention is a bearing with a load cell, wherein a load cell mounting hole is formed in the center lower portion of the bearing body in parallel with the bearing hole, and a load cell is set in the load cell mounting hole. is there.

In the above invention, since the bearing is distorted by the load applied to the bearing, the amount of this distortion is measured by a load cell to calculate the total load. Therefore, the size of the load cell can be reduced, and there are few factors affecting the measured value, so that a highly accurate measured value can be expected.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a load cell mounting hole is formed below a shaft hole of a bearing, and a load cell is set in the mounting hole. In order to increase the amount of distortion of the load cell mounting hole, a relief groove is formed in order to increase the amount of elastic deformation of the bearing hole wall.

[0010]

[Embodiment 1] A mounting hole 3 for a cylindrical load cell 4 is provided parallel to the bearing hole 2 of the bearing body 1 and below the bearing hole 2.
Are formed in a cylindrical shape, and the load cells 4 and 4 are attached to the upper portion of the inner wall of the bearing hole 3. Next, arc-shaped grooves 6, 6 are formed through the lower half wall of the bearing hole 2 and a predetermined thick portion 5, and the load cells 4 are formed at the lower ends of the arc-shaped grooves 6, 6.
The vertical hanging grooves 7, 7 are continuously provided so as to sandwich the mounting hole 3 of the bearing hole 3, and lateral grooves 8, 8 reaching directly above the arc-shaped grooves 6, 6 are formed on the left and right inner walls at the center of the bearing hole 2. In the figure, reference numerals 9 and 9 denote metal that abuts against the inner wall of the bearing hole 2,
10 is a cover, 11 is a cover fixing bolt, 12 is a load cell cable, and 13 is a shaft.

In the above embodiment, when a load is applied to the shaft 13, the inner wall of the bearing hole 2 is pressed through the bearing 14 as shown by an arrow 15 (shown in FIGS. 1 and 2). Correspondingly, the thick portion 5 is deformed, and the mounting hole 3 of the load cell 4 (which is easily deformed by the arc-shaped groove) is also deformed. And input to a measuring instrument (not shown). Then, in the measuring instrument, the load is corrected by a predetermined correction value and displayed as a load (numerical value or pointer) applied to the machine. If the output of the measuring device is input to a controller (not shown), the overload of a machine or the like can be automatically controlled.

[0012]

Embodiment 2 Another embodiment of the present invention will be described with reference to FIG. An arc-shaped groove 16 is formed in the lower center of the bearing body 1 in parallel with the lower wall of the bearing hole 2 through a thick portion 17, and the load cells 4, 4 are attached to the upper inner wall of the arc-shaped groove 16. is there. In the above embodiment, when a load is applied to the shaft, the load is also applied to the bearing hole 2 as indicated by an arrow 18, so that the thick portion 17 is also deformed in proportion to the load. Then, a pressing force is applied to the load cell in accordance with the deformation amount, and the load cell outputs the load in proportion to the magnitude. Therefore, this output is measured by a measuring device (not shown).
, The load applied to the machine can be known with appropriate correction.

[0013]

According to the present invention, the load cell is set at the lower part of the bearing hole via the predetermined thick portion, so that the load on the shaft (or the load applied to the machine) is generated by the output of the load cell due to the distortion of the bearing hole. Has the effect of being able to immediately know the load.

According to the present invention, since the load cell can be installed in the bearing, it is small and can be installed irrespective of other objects, and the measurement accuracy can be improved.

[Brief description of the drawings]

FIG. 1 is a front view in which a part of an embodiment of the present invention is omitted.

FIG. 2 is a vertical sectional side view of the same.

FIG. 3 is a sectional view taken along the line AA in FIG. 1;

FIG. 4 is a front view in which a part of the other embodiment is omitted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bearing main body 2 Bearing hole 3 Mounting hole 4 Load cell 5 Thick part 6 Arc groove 7 Hanging groove 8 Side groove 9 Metal 10 Cover 11 Cover mounting bolt 12 Cable 13 Shaft 14 Bearing 16 Arc groove 17 Thick part

Claims (4)

[Claims] 1. To a lower part of a center of a bearing hole of a bearing body,
Along with the load cell mounting hole, an arc-shaped groove is formed along the lower half of the bearing hole and through a predetermined thick portion, and a lower portion of the arc-shaped groove is interposed with the load cell mounting hole interposed therebetween. A bearing having a load cell, wherein a groove is continuously provided, and a load cell is set on a wall of the load cell mounting hole. 2. The bearing with a load cell according to claim 1, wherein a plurality of load cells are bonded to an upper portion of an inner wall of the mounting hole. 3. A lateral groove is formed on both side walls of a central portion of the bearing hole through an upper end of the arc-shaped groove and a predetermined thick portion in a direction parallel to a horizontal axis of the bearing hole. The bearing with a load cell according to claim 1. 4. A bearing with a load cell, wherein a load cell mounting hole is formed in a lower portion of the center of the bearing body in parallel with the bearing hole, and a load cell is set in the load cell mounting hole.