Device for measuring force in the rolling bearing by means of a sensor layer

Abstract

A measurement bearing is provided. The measurement bearing has a rolling bearing, at least one force-introducing ring and a space for at least one sensor layer, the space being surrounded by the at least one force-introducing ring and at least one other adjacent component of the measurement bearing.

Claims

1. A measurement bearing, comprising a rolling bearing, at least one force introducing ring and an installation space for at least one sensor layer, the installation space is surrounded by the at least one force introducing ring and at least one other adjacent component of the measurement bearing, the rolling bearing including a rolling bearing cage, an outer ring, and an inner ring, with the rolling bearing cage with rolling bodies being arranged between the outer ring and the inner ring, the outer ring or the inner ring is provided as the at least one other adjacent component, either the force introducing ring is arranged along an inner lateral surface of the inner ring, and the installation space is surrounded by the force introducing ring and the inner ring and the at least one sensor layer is arranged on the inner ring or the force introducing ring, or the force introducing ring is arranged along an outer lateral surface of the outer ring, and the installation space is surrounded by the force introducing ring and the outer ring, and the at least one sensor layer is arranged on the outer ring or the force introducing ring, and an additional force introducing ring is arranged along a side edge of the outer ring, and an additional installation space is surrounded by the additional force introducing ring and the side edge of the outer ring, and at least one additional sensor layer is arranged on the side edge of the outer ring or on the additional force introducing ring.

2. The measurement bearing according to claim 1, wherein the sensor layer has at least one layer formed as a thin film.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) The invention is now shown by figures using examples. Shown herein are

(2) FIG. 1 a schematic view of a section through a measurement bearing not according to the invention,

(3) FIG. 2 a schematic view of a section through a chamber of the measurement bearing from FIG. 1,

(4) FIG. 3 a schematic view of a section through another alternative chamber of the measurement bearing from FIG. 1,

(5) FIG. 4 a schematic view of a section through another alternative chamber of the measurement bearing from FIG. 1,

(6) FIG. 5 a schematic view of a section through another measurement bearing not according to the invention, and

(7) FIG. 6 a schematic view of a section through another alternative measurement bearing from FIG. 5, and

(8) FIG. 7 a schematic view of a section through a measurement bearing according to the invention originating from the construction according to FIG. 5.

DETAILED DESCRIPTION OF THE DRAWING

(9) In FIG. 1, a schematic view of a section through a measurement bearing not according to the invention is shown.

(10) The measurement bearing 20 has a rolling bearing 10. The rolling bearing 10 is constructed as an axial cylinder roller bearing. The rolling bearing 10 has a housing plate 1, rolling bodies 2, a shaft washer 3, and a rolling bearing cage 4. The housing plate 1, the rolling bodies 2, the shaft washer 3, and the rolling bearing cage 4 form the rolling bearing 10. The rolling bodies 2 are supported so that they can rotate in the rolling bearing cage 4. The rolling bearing cage 4 and the rolling bodies 2 are bounded by the housing plate 1 and the shaft washer 3.

(11) Furthermore, the measurement bearing 20 has a chamber. The chamber has a cover plate 5, an installation space 6 for multiple sensor layers 6′, and two force introducing rings 7 and 7′. The installation space 6 for the sensor layers 6′ is arranged between the shaft washer 3 and the cover plate 5 and is bounded on two sides by the force introducing rings 7 and 7′.

(12) The sensor layers 6′ are applied on the cover plate 5 in the installation space 6.

(13) After successful installation of the measurement bearing 20 in a device, the load is introduced via the force introducing rings into the shaft washer. Due to this load, strain occurs in the chamber, especially in the installation space 6 and on the force introducing rings 7 and 7′, as well as the shaft ring 3. This strain can now be detected by means of the sensor layers 6′ and transmitted to a corresponding device (not shown) for evaluation by means of sensor lines that are provided in a channel in the force introducing ring 7.

(14) In FIG. 2, a schematic view of a section through a chamber of the measurement bearing from FIG. 1 is shown.

(15) The rolling bearing (not shown) can have the same structure as already described under FIG. 1.

(16) The chamber connects to the rolling bearing. The chamber has two cover plates 5 and 5′, an installation space 6 for the sensor layers 6′, and two force introducing rings 7 and 7′. The installation space 6 for the sensor layers 6′ is arranged between the two cover plates 5 and 5′ and is bounded on two sides by the force introducing rings 7 and 7′.

(17) The installation space 6 has one or more sensor layers 6′. The sensor layers 6′ are applied on the lower cover plate 5 in the installation space 6 at the farthest from the housing, but could also be applied on the opposite cover plate.

(18) After successful installation of the measurement bearing 20 in a device, loads are guided via the walls of the chamber. Due to these loads, strain occurs in the chamber, especially in the installation space 6 and on the force introducing rings 7 and 7′. This strain can now be detected by means of the sensor layers 6′.

(19) In FIG. 3, a schematic view of a section through another alternative chamber of the measurement bearing from FIG. 1 is shown.

(20) The rolling bearing (not shown) can have the same structure as already described under FIG. 1.

(21) The chamber connects to the rolling bearing. The chamber has a cover plate 5, an installation space 6 for the sensor layers 6′, and a force introducing ring 7 with a U-shaped cross section. The installation space 6 for the sensor layers 6′ is arranged between the cover plate 5 and the force introducing ring 7.

(22) The installation space 6 has several sensor layers 6′. The sensor layers 6′ are applied on the cover plate 5 in the installation space 6, but could also be applied on the cover plate 5.

(23) In this way, the chamber can be positioned relative to the rolling bearing 10 so that either the cover plate 5 or the force introducing ring 7 points toward the rolling bearing 10.

(24) After successful installation of the measurement bearing 20 in a device, the rolling bearing 10 presses on the chamber. Due to this pressure, strain occurs in the chamber, especially in the installation space 6 and on the force introducing ring 7 or the cover plate 5. This strain can now be detected by means of the sensor layers 6′.

(25) In FIG. 4, a schematic view of a section through another alternative chamber of the measurement bearing from FIG. 1 is shown.

(26) The rolling bearing (not shown) can have the same structure as already described under FIG. 1.

(27) The chamber connects to the rolling bearing. The chamber has two cover plates 5 and 5′, an installation space 6 for the sensor layers 6′, and two force introducing rings 7 and 7′. The installation space 6 for the sensor layers 6′ is arranged between the two cover plates 5 and 5′ and is bounded on two sides by the force introducing rings 7 and 7′. The lower cover plate 5 has a shorter design than the upper cover plate 5′.

(28) The installation space 6 has one or more sensor layers 6′. The sensor layers 6′ are applied on one of the cover plates 5 or 5′ in the installation space 6 for the sensor layers 6′. In this way, the chamber can be positioned relative to the rolling bearing 10 so that either the cover plate 5 or 5′ points toward the rolling bearing 10.

(29) After successful installation of the measurement bearing 20 in a device, the rolling bearing 10 presses on the chamber. Due to this pressure, strain occurs in the chamber, especially in the installation space 6 and on the force introducing rings 7 and 7′. This strain can now be detected by means of the sensor layers 6′.

(30) In FIG. 5, a schematic view of a section through another measurement bearing not according to the invention is shown.

(31) The measurement bearing 20 has a rolling bearing 10. The rolling bearing 10 is constructed as a grooved ball bearing. The rolling bearing 10 has rolling bodies 2, a rolling bearing cage 4, an outer ring 8, and an inner ring 9.

(32) The outer ring 8, the inner ring 9, the rolling bearing cage 4, and the rolling bodies 2 form the rolling bearing 10. The rolling bodies 2 are supported in the rolling bearing cage 4 so that they can rotate. The outer ring 8 and the inner ring 9 bound the rolling bearing cage 4 and the rolling bodies 2.

(33) A chamber that is arranged on the outer lateral surface of the outer ring 8 connects to the rolling bearing 10. The chamber has the installation space 6 for the sensor layers 6′ and a force introducing ring 7 with a U-shaped cross section. The installation space 6 for the sensor layers 6′ is arranged between the outer ring 8 and the force introducing ring 7.

(34) The installation space 6 has one or more sensor layers 6′. The sensor layers 6′ are applied on the outer ring 8 or on the force introducing ring 7 in the installation space 6.

(35) After successful installation of the measurement bearing 20 in a device, the rolling bearing 10 presses on the chamber. Due to this pressure, strain occurs in the chamber, especially in the installation space 6 and on the force introducing ring 7. This strain can now be detected by means of the sensor layers 6′ and transmitted to a corresponding device (not shown) for evaluation by means of sensor lines that are provided in a channel in the force introducing ring 7.

(36) In FIG. 6, a schematic view of a section through another alternative measurement bearing from FIG. 5 is shown.

(37) The measurement bearing 20 has a rolling bearing 10. The rolling bearing 10 is constructed as a grooved ball bearing. The rolling bearing 10 has rolling bodies 2, a rolling bearing cage 4, an outer ring 8, and an inner ring 9.

(38) The outer ring 8, the inner ring 9, the rolling bearing cage 4, and the rolling bodies 2 form the rolling bearing 10. The rolling bodies 2 are supported in the rolling bearing cage 4 so that they can rotate. The outer ring 8 and the inner ring 9 bound the rolling bearing cage 4 and the rolling bodies 2.

(39) A chamber that is arranged on the inner lateral surface of the inner ring 9 connects to the rolling bearing 10. The chamber has the installation space 6 for the sensor layers 6′ and a force introducing ring 7 with a U-shaped cross section. The installation space 6 for the sensor layers 6′ is arranged between the outer ring 8 and the force introducing ring 7.

(40) The installation space 6 has one or more sensor layers 6′. The sensor layers 6′ are applied on the outer ring 8 or the force introducing ring 7 in the installation space 6.

(41) After successful installation of the measurement bearing 20 in a device, the rolling bearing 10 presses on the chamber. Due to this pressure, strain occurs in the chamber, especially in the installation space 6 and on the force introducing ring 7. This strain can now be detected by means of the sensor layers 6′.

(42) In FIG. 7, a schematic view of a section through another alternative measurement bearing according to the invention originating from the construction according to FIG. 5 is shown.

(43) In contrast to FIG. 5, an additional chamber is provided in FIG. 7. The chamber extends along the round circular right side edge of the outer ring 8, that is, along the right end side 11 of the outer ring 8 (compare with FIG. 5).

(44) The chamber has an additional installation space 6 for the sensor layers 6′ and an additional force introducing ring 7″ with a U-shaped cross section. The additional installation space 6 for the sensor layers 6′ is arranged between the outer ring 8 and the additional force introducing ring 7″.

(45) Each installation space 6 has one or more sensor layers 6′. The sensor layers 6′ are applied on the outer ring 8 or the force introducing rings 7, 7″ in the installation space 6.

(46) After successful installation of the measurement bearing 20 in a device, the rolling bearing 10 also presses on the additional chamber. Due to this pressure, strain occurs in the chambers, especially in the respective installation space 6 and on the respective force introducing ring 7, 7″. This strain can now be detected by means of the sensor layers 6′. The force introducing ring 7 is decisively suitable for detecting radial loads. The force introducing ring 7″ is decisively suitable for detecting axial loads.

(47) In this way, a measurement bearing 20 can be created with a rolling bearing 10, in which the sensor layers are arranged protected within the measurement bearing 20 and this is also in the position, in addition to its ability to transfer loads, to determine the loads that occur without requiring additional maintenance on the rolling bearing 10 and allowing costs to be saved.

(48) With the measurement bearing 20, the quality and functionality are increased, as well as the safety of systems and machines.

LIST OF REFERENCE NUMBERS

(49) 1 Housing plate

(50) 2 Rolling body

(51) 3 Shaft washer

(52) 4 Rolling bearing cage

(53) 5 Cover plate

(54) 5′ Cover plate

(55) 6 Installation space

(56) 6′ Sensor layer

(57) 7 Force introducing ring

(58) 7′ Force introducing ring

(59) 7″ Force introducing ring

(60) 8 Outer ring

(61) 9 Inner ring

(62) 10 Rolling bearing

(63) 11 Side edge (end side of the outer ring)

(64) 20 Measurement bearing