Bearing state detection device

Abstract

The utility model discloses a bearing state detection device, a bearing comprises an inner ring, an outer ring and a rolling part arranged between the inner ring and the outer ring, and the end part of the inner wall of the outer ring is provided with an annular clamping groove; the bearing state detection device comprises an outer retaining ring which is located at the end of a bearing, the outer retaining ring is provided with an axial through notch so that the outer retaining ring can be elastically contracted and expanded in the radial direction, the outer retaining ring is provided with a ring wall, and the inner end of the ring wall of the outer retaining ring is provided with an annular clamping protrusion; the inner end of the annular wall extends into the outer ring through elastic scaling, and the annular clamping bulge is clamped in the annular clamping groove; the inner end of the inner retaining ring is arranged on the outer peripheral surface of the inner ring in a sleeving manner; the detection module comprises a detection unit and a reference ring, the reference ring is arranged on the inner retaining ring in a sleeving mode, the detection unit is arranged on the outer retaining ring and faces the reference ring, and the reference ring of the detection unit measures the radial runout amount and the axial movement amount of the inner ring relative to the outer ring.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission equipment, in particular to a bearing state detection device. Background Art

[0002] Traditional bearings typically consist of an inner ring, an outer ring positioned outside the inner ring, and rolling elements positioned between the two rings. In some bearing types, a sealing ring is installed between the inner and outer rings to prevent foreign matter from entering the rolling elements through the gap between the inner and outer rings. The specific installation structure of the sealing ring is as follows: For bearings with a fixed outer ring and a rotating inner ring, an annular groove is defined on the inner wall of the outer ring, into which the outer edge of the sealing ring fits.

[0003] Bearings with sealing rings are typically precision bearings, typically required to exhibit high transmission accuracy and smooth operation. Consequently, devices for online testing of these bearings have emerged in the prior art. These devices are typically used to measure radial runout and axial play. However, the components of these online testing devices are typically mounted on the bearing seat and / or drive shaft, using the bearing seat and / or drive shaft as the measurement reference. This can easily lead to significant measurement errors and consumes excessive installation space. Utility Model Content

[0004] In view of the above technical problems existing in the prior art, the utility model provides a bearing state detection device.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A bearing state detection device, wherein the bearing comprises an inner ring, an outer ring, and a rolling member disposed between the inner ring and the outer ring; the outer ring is mounted in a mounting hole of a bearing seat to serve as a fixed ring; the end of a transmission shaft is mounted in an inner hole of the inner ring; the inner ring serves as a rotating ring; the inner wall of the outer ring has an annular groove at an axial position near both ends; the bearing state detection device comprises:

[0007] an outer retaining ring, located at an end of the bearing, having an axially extending notch to enable radial elastic expansion and contraction of the outer retaining ring; and an annular wall having an annular projection disposed at an inner end thereof. The inner end of the annular wall extends into the outer ring through elastic expansion and contraction, and the annular projection is engaged in the annular groove;

[0008] an inner retaining ring, the inner end of which is sleeved on the outer circumference of the inner ring;

[0009] The detection module includes a detection unit and a reference ring, wherein the reference ring is sleeved on the inner retaining ring, the detection unit is arranged on the outer retaining ring and faces the reference ring, and the detection unit reference ring measures the radial runout and axial movement of the inner ring relative to the outer ring.

[0010] Preferably,

[0011] A first reflective layer is arranged on the outer circumference of the reference ring, and a second reflective layer is arranged on the side wall of the reference ring.

[0012] The outer end of the outer retaining ring has an end wall, and the detection unit includes a first infrared sensor radially penetrating the ring wall of the outer retaining ring and facing the first reflective layer, and a second infrared sensor axially penetrating the end wall of the outer retaining ring and facing the second reflective layer.

[0013] Preferably, a sealing component is installed on the inner side of the inner edge of the end wall.

[0014] Preferably, the inner retaining ring is configured with a stepped portion, the radial dimension of the outer side of the stepped portion is smaller than the radial dimension of the inner side of the stepped portion, and the reference ring is positioned on the stepped portion and locked by a lock nut.

[0015] Preferably, a through hole is opened on the inner side of the inner retaining ring, and a first temporary welding point is arranged on the area of ​​the outer circumferential surface of the outer ring opposite to the through hole.

[0016] Preferably, a notch is arranged on the ring wall of the outer retaining ring, and a second temporary welding point is arranged in a region of the end face of the outer ring opposite to the notch.

[0017] Preferably, the bearing detection device further comprises a pressure cover, the outer edge of the pressure cover is attached and fixed to the end face of the bearing seat, and the inner edge of the pressure cover is pressed against the end face of the outer ring.

[0018] Compared with the prior art, the bearing status detection device disclosed in the present invention has the following beneficial effects:

[0019] The detection device provided by the present invention is installed on the bearing rather than on the bearing seat and the transmission shaft, so the measurement error is small and the space occupied is small. Moreover, when the bearing, the bearing seat and the transmission shaft are disassembled, the detection device is prevented from being disassembled as well.

[0020] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention.

[0021] The overview of various implementations or examples of the technology described in this utility model is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar components. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the description and claims, serve to illustrate the embodiments of the utility model. Where appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

[0023] Figure 1 This is a main sectional view of a bearing status detection device provided in an embodiment of the present utility model.

[0024] Figure 2 This is a right side view of the bearing status detection device provided in an embodiment of the present utility model.

[0025] Figure 3 This is a main cross-sectional view of the bearing status detection device provided in an embodiment of the present invention, in cooperation with the bearing seat and the transmission shaft.

[0026] Figure 4 for Figure 3 An enlarged view of detail A.

[0027] Figure 5 for Figure 3 An enlarged view of detail B.

[0028] Reference numerals:

[0029] 100-detection device; 10-outer retaining ring; 11-ring wall; 111-annular retaining protrusion; 112-notch; 20-inner retaining ring; 12-end wall; 13-notch; 21-step portion; 22-through hole; 31-first infrared sensor; 32-second infrared sensor; 33-reference ring; 331-first reflective layer; 332-second reflective layer; 40-sealing component; 50-pressure cover; 61-first temporary welding point; 62-second temporary welding point; 70-lock nut; 200-bearing; 201-outer ring; 2011-annular retaining groove; 202-inner ring; 203-rolling component; 204-sphere; 205-retaining frame; 206-sealing ring; 300-bearing seat; 400-drive shaft. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the usual meanings understood by persons of ordinary skill in the field to which this utility model belongs. The words "first", "second" and similar terms used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0032] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0033] like Figure 1 and Figure 3 As shown, an embodiment of the present invention discloses a bearing condition detection device 100 for detecting radial runout and axial play of a bearing 200 having a sealing ring 206. The bearing 200 comprises an inner ring 202, an outer ring 201, and a rolling element 203 disposed between the inner and outer rings 202 and 201. The rolling element 203 comprises a retainer 205 and circumferentially arranged balls 204 mounted within the retainer 205. Annular grooves 2011 are defined at both axial ends of the inner wall of the outer ring 201. Seal rings 206 are located at both ends of the bearing 200, with their outer edges retained in the annular grooves 2011. Before installing the bearing 200, the seal rings 206 at the axial outer ends of the bearing 200 are removed to facilitate installation of the detection device 100. The bearing 200 is installed as follows: the outer ring 201 is installed in the installation hole of the bearing seat 300, and the end of the transmission shaft 400 extends into the inner ring 202. In this way, the outer ring 201 serves as a fixed ring and the inner ring 202 serves as a rotating ring.

[0034] like Figures 1 to 5As shown, the detection device 100 includes: an outer retaining ring 10, an inner retaining ring 20, a detection module, and a sealing component 40. The outer retaining ring 10 has a notch 13 to enable elastic expansion and contraction. The outer retaining ring 10 includes an annular wall 11 and an end wall 12 located at the axial outer end of the annular wall 11. The annular wall 11 and the end wall 12 are integrally formed. The inner end of the annular wall 11 is machined with an annular retaining protrusion 111. When the outer retaining ring 10 is kept in a retracted state, the inner end of the annular wall 11 extends into the inner wall of the outer ring 201. When the outer retaining ring 10 is released, the annular retaining protrusion 111 is retained in the annular retaining groove 2011, thereby achieving assembly with the outer ring 201 of the bearing 200. The inner retaining ring 20 has a stepped portion 21 in the middle. The radial dimension of the inner side of the stepped portion 21 is larger than the radial dimension of the outer side of the stepped portion 21. The inner retaining ring 20 on the inner side of the stepped portion 21 is sleeved onto the outer circumferential surface of the inner ring 202, thereby achieving axial assembly with the inner ring 202. To prevent the end wall 12 of the outer retaining ring 10 from interfering with the installation of the inner retaining ring 20 and the installation of related components of the inspection module, the inner retaining ring 20 must be installed first.

[0035] A through hole 22 is pre-opened on the inner retaining ring 20 on the inner side of the step portion 21. After the inner end of the inner retaining ring 20 is sleeved on the outer circumferential surface of the inner ring 202, a welding gun is inserted into the through hole 22 and a first temporary weld 61 is applied to the outer circumferential surface of the inner ring 202 opposite to the through hole 22 (the so-called temporary weld is a weld with a certain bonding strength and is easy to be removed). In this way, the inner retaining ring 20 is positioned circumferentially and axially; a notch 112 is opened on the annular wall 11 of the outer retaining ring 10, and the notch 112 is opposite to the end face of the outer ring 201. By welding, the notch 112 is inserted into the notch 112 and a second temporary weld 62 is applied to the end face of the outer ring 201 opposite to the notch 112. In this way, the outer retaining ring is circumferentially positioned by the second temporary weld 62, and the outer retaining ring 10 is axially positioned by the cooperation of the annular retaining protrusion 111 and the annular retaining groove 2011. It should be noted that the stepped portion 21 allows the outer side of the inner retaining ring 20 to fully avoid the welding gun, so that the welding gun can easily enter the gap between the outer ring 201 and the inner ring 202 and extend into the through hole 22 of the inner retaining ring 20 .

[0036] The detection module includes: a first infrared sensor 31, a second infrared sensor 32 and a reference ring 33; the reference ring 33 is sleeved on the inner retaining ring 20 and positioned at the step 21, and is locked by a lock nut 70. A first reflective layer 331 is arranged on the outer peripheral surface of the reference ring 33, and a second reflective layer 332 is arranged on the outer wall of the reference ring 33. The first infrared sensor 31 radially penetrates the ring wall 11 of the outer retaining ring 10 and faces the first reflective layer 331. The second infrared sensor 32 axially penetrates the end wall 12 of the outer retaining ring and faces the second reflective layer 332. When the bearing 200 is running, the first infrared sensor 31 emits infrared rays to the first reflective layer 331 to measure the radial runout of the reference ring 33, and then measures the radial runout of the inner ring 202. The second infrared sensor 32 emits infrared rays to the second reflective layer 332 to measure the axial runout of the reference ring 33, and then measures the axial runout of the inner ring 202.

[0037] The end wall 12 of the outer retaining ring 10 is opposite to the outer side wall of the reference ring 33. The annular sealing component 40 is attached and fixed to the inner side of the end wall 12 and is located between the end wall 12 and the reference ring 33. The sealing component 40 is used to prevent external impurities from entering between the outer ring 201 and the inner ring 202. The sealing component 40 is used to replace the removed original sealing ring 206 and plays the same role as the sealing ring 206.

[0038] In response to the requirement that the outer ring 201 needs to be limited in both directions, the detection device 100 also includes a pressure cover 50, the outer edge of which is attached to the end face of the bearing seat 300 and fixed to the end face of the bearing seat 300 by fasteners, and the inner edge of the pressure cover 50 is pressed against the end face of the outer ring 201 of the bearing 200, thereby utilizing the bearing seat 300 and the pressure cover 50 to achieve bidirectional limitation of the outer ring 201.

[0039] Furthermore, although exemplary embodiments have been described herein, the scope of the present invention includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., solutions that intersect various embodiments), adaptations, or changes. The elements of the claims are to be interpreted broadly based on the language employed in the claims and are not limited to the examples described in this specification or during the prosecution of this application, which examples are to be construed as non-exclusive. Therefore, it is intended that this specification and examples be considered merely as examples, with the true scope and spirit being indicated by the following claims and their full scope of equivalents.

[0040] The above description is intended to be illustrative and not restrictive. For example, the above examples (or one or more of their embodiments) may be used in combination with each other. For example, a person of ordinary skill in the art may use other embodiments when reading the above description. In addition, in the above detailed description, various features may be grouped together to simplify the present invention. This should not be interpreted as an intention that a disclosed feature that is not claimed for protection is necessary for any claim. On the contrary, the subject matter of the present invention may have less than all the features of a particular disclosed embodiment. Therefore, the following claims are incorporated herein into the detailed description as examples or embodiments, with each claim independently serving as a separate embodiment, and it is contemplated that these embodiments may be combined with each other in various combinations or arrangements. The scope of the present invention should be determined with reference to the appended claims and the full scope of equivalents to which these claims are entitled.

[0041] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the spirit and scope of protection of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present invention.

Claims

1. A bearing condition detection device, wherein the bearing comprises an inner ring, an outer ring, and a rolling element disposed between the inner ring and the outer ring; the outer ring is mounted in a mounting hole of a bearing seat as a fixed ring; the end of a transmission shaft is mounted in an inner hole of the inner ring; the inner ring serves as a rotating ring; the inner wall of the outer ring has an annular groove near both ends of the axial position, characterized in that: The bearing state detection device comprises: an outer retaining ring, located at an end of the bearing, having an axially extending notch to enable radial elastic expansion and contraction of the outer retaining ring; and an annular wall having an annular projection disposed at an inner end thereof. The inner end of the annular wall extends into the outer ring through elastic expansion and contraction, and the annular projection is engaged in the annular groove; an inner retaining ring, the inner end of which is sleeved on the outer circumference of the inner ring; The detection module includes a detection unit and a reference ring, wherein the reference ring is sleeved on the inner retaining ring, the detection unit is arranged on the outer retaining ring and faces the reference ring, and the detection unit reference ring measures the radial runout and axial movement of the inner ring relative to the outer ring.

2. The bearing state detection device according to claim 1, characterized in that: A first reflective layer is arranged on the outer circumference of the reference ring, and a second reflective layer is arranged on the side wall of the reference ring. The outer end of the outer retaining ring has an end wall, and the detection unit includes a first infrared sensor radially penetrating the ring wall of the outer retaining ring and facing the first reflective layer, and a second infrared sensor axially penetrating the end wall of the outer retaining ring and facing the second reflective layer.

3. The bearing state detection device according to claim 2, characterized in that: A sealing component is installed on the inner side of the inner edge of the end wall.

4. The bearing state detection device according to claim 2, characterized in that: The inner retaining ring is configured with a stepped portion, the radial dimension of the outer side of the stepped portion is smaller than the radial dimension of the inner side of the stepped portion, and the reference ring is positioned on the stepped portion and locked by a lock nut.

5. The bearing state detection device according to claim 1, characterized in that: A through hole is formed on the inner side of the inner retaining ring, and a first temporary welding point is arranged on the outer peripheral surface of the outer ring in an area opposite to the through hole.

6. The bearing state detection device according to claim 1, characterized in that: A notch is arranged on the ring wall of the outer retaining ring, and a second temporary welding point is arranged in an area of ​​the end surface of the outer ring opposite to the notch.

7. The bearing state detection device according to claim 1, characterized in that: The bearing detection device further comprises a pressure cover, the outer edge of the pressure cover is attached and fixed to the end face of the bearing seat, and the inner edge of the pressure cover is pressed against the end face of the outer ring.

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