CN118008947A - Ball bearing and computer tomograph frame - Google Patents

Abstract

The present disclosure relates to a ball bearing and an electronic computer tomography gantry, the ball bearing comprising: an outer race (10), an inner race (20), and balls (30) located between the outer race (10) and the inner race (20); the outer ring (10) is of a sectional structure formed by one or more arc-shaped sections along the circumferential direction (W) of the ball bearing. The outer ring of sectional type structure for the outer ring no longer is complete annular structure in circumference, the production and the equipment of outer ring on the one hand of being convenient for, on the other hand can set up the length of the section number, the material strength or the different sections of outer ring according to the position area and the size of load, and application scope is wide, and adaptability is strong, can also reduce the material cost of outer ring production.

Description

Ball bearing and computer tomograph frame

Technical Field

The invention relates to the technical field of bearings, in particular to a ball bearing and an electronic computer tomography machine frame.

Background

In the related art, an electronic computed tomography (Computer Tomography, abbreviated as CT) includes a Gantry (also called a Gantry), which has a rotating member, in which a large ball bearing is generally disposed, so that the rotating member can rotate, thereby realizing tomography or scanning of a human body.

The ball bearing comprises an outer ring, an inner ring and balls, however, the ball bearing applied to CT Gantry has larger diameter and relatively narrower width, is not easy to produce and assemble, has different bearing capacities, and has the problems of easy deformation and the like.

Disclosure of Invention

To overcome the problems in the related art, the present disclosure provides a ball bearing and an electronic computer tomography gantry.

According to a first aspect of embodiments of the present disclosure, the present disclosure provides a ball bearing comprising: an outer race, an inner race, and balls located between the outer race and the inner race; the outer ring is of a sectional structure formed by one or more arc-shaped sections along the circumferential direction of the ball bearing.

In some embodiments, the ball bearing comprises: a loaded region and an unloaded region, the outer race comprising: a load portion corresponding to the load region of the ball bearing; a non-load portion corresponding to the non-load region of the ball bearing; wherein the material strength of the loading portion is greater than the material strength of the unloading portion.

In some embodiments, the arc length of the loaded portion is greater than or equal to the arc length of the unloaded portion.

In some embodiments, the outer wall of the non-load carrying portion is provided with a coating having the same strength as the material strength of the load carrying portion.

In some embodiments, the load portion includes one or more first arcuate segments; and/or the non-load portion comprises one or more second arcuate segments.

In some embodiments, the load portion comprises two symmetrically disposed first arcuate segments; and/or the non-load part comprises two symmetrically arranged second arc-shaped sections.

In some embodiments, the load portion and the non-load portion are integrally formed, and a gap is provided at the non-load portion.

In some embodiments, the ball bearing is a ball bearing or a roller bearing.

According to a second aspect of embodiments of the present disclosure, the present disclosure provides a computer tomography gantry comprising: the ball bearing of the first aspect; an outer bearing housing in torsional connection with the outer race of the ball bearing; and an inner bearing housing in torsional connection with the inner race of the ball bearing.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: the outer ring of sectional type structure for the outer ring no longer is complete annular structure in circumference, the production and the equipment of outer ring on the one hand of being convenient for, on the other hand can set up the length of the section number, the material strength or the different sections of outer ring according to the position area and the size of load, and application scope is wide, and adaptability is strong, can also reduce material cost.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a cross-sectional view of a computed tomography gantry shown according to an exemplary embodiment;

Fig. 2 is a schematic view of an outer race of a ball bearing according to a first exemplary embodiment;

FIG. 3 is a schematic view of a portion of the outer race of FIG. 2;

FIG. 4 is a schematic view of an outer race of a ball bearing according to a second exemplary embodiment;

fig. 5 is a partial schematic view of an outer race of a ball bearing according to a third exemplary embodiment.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

In the present invention, unless otherwise specified, the axial direction, the radial direction R, and the circumferential direction W refer to the axial direction, the radial direction R, and the circumferential direction W of the ball bearing, respectively; the upper side is the upper end in the gravitational direction (upper side shown in fig. 1 and 2), and the lower side is the lower end in the gravitational direction (upper side shown in fig. 1 and 2). In addition, the term "torsionally connected" means that torque can be transferred between two components and the manner in which the torsionally connected can be achieved can include interference fit, as well as bolting, etc.

The present disclosure provides a ball bearing adapted to be mounted in a computer tomography gantry. Wherein, as shown in fig. 1, the computer tomography stand comprises an outer bearing housing 40, an inner bearing housing 50, and a ball bearing between the outer bearing housing 40 and the inner bearing housing 50; the outer bearing seat 40 is in torsion-resistant connection with the outer ring 10 of the ball bearing; the inner bearing housing 50 is connected in a rotationally fixed manner to the inner ring 20 of the ball bearing. The inner bearing housing 50 is rotatable relative to the outer bearing housing 40 by rotation of the ball bearing inner race 20 and outer race 10.

As further shown in fig. 1, the ball bearing includes an outer race 10, an inner race 20, and balls 30 located between the outer race 10 and the inner race 20. Since the computer tomograph requires the accommodation of the bed, the ball bearings used in the computer tomograph have a large diameter and a relatively narrow width, and the outer ring 10 or the inner ring 20 of the ball bearings having a large diameter are not easy to manufacture and assemble.

In addition, since the middle part of the computer tomograph frame needs to be provided with a bed body which can pass through the inside of the frame, the load born by the whole ball bearing in the circumferential direction W is different, and the weight born by the lower part of the ball bearing in the gravity direction is larger than that born by the upper part, so that the deformation of the lower part of the ball bearing is easy to cause.

In order to avoid deformation, the outer ring 10 of the entire ball bearing is made of the same strength material, which not only results in a heavy weight of the computer tomograph frame, but also is disadvantageous in terms of cost reduction.

To this end, as shown in fig. 2 to 5, the outer ring 10 of the ball bearing provided in the present disclosure has a segmented structure, and the outer ring 10 includes one or more arc-shaped segments (as shown in fig. 3 and 4) along the circumferential direction W of the ball bearing.

The outer ring 10 of sectional type structure for the outer ring 10 no longer is complete annular structure in circumference W, is mutually independent between the multistage arc section, so, need not to produce whole annular outer ring 10, has reduced the technology degree of difficulty of production and the rejection rate of production. In addition, when the multi-segment arc segments are installed on the outer bearing seat 40 in a segmented manner, the installation difficulty is reduced, and the installation efficiency and the yield are improved.

In addition, a gap is formed between the end parts of the adjacent arc-shaped sections, the arc-shaped sections can be elastically deformed within a certain range, and the radial R gap between the outer ring 10 and the outer bearing seat 40 can be automatically adjusted through the elastic deformation and the gap of the arc-shaped sections, so that the outer wall of the outer ring 10 can be better attached to the inner wall of the outer bearing seat 40, and the outer ring 10 is prevented from being separated from the outer bearing seat 40 under the action of the inner ring 20 and the balls 30.

Further, in some embodiments, the ball bearing includes a loaded region and an unloaded region. From the above, it is clear that the load area, i.e., the lower side of the ball bearing in the gravity direction is used for bearing the weight of the bed body and the human body, and the non-load area, i.e., the upper side of the ball bearing in the gravity direction.

In the disclosed embodiment, the outer race 10 includes a load portion 11 and a non-load portion 12. The load portion 11 corresponds to a load region of the ball bearing; the unloaded portion 12 corresponds to an unloaded region of the ball bearing. Wherein the material strength of the loading part 11 is greater than that of the unloading part 12.

In this embodiment, the material of the load portion 11 and the material of the non-load portion 12 may be different, so that a material with high cost and high strength may be applied to the load portion 11, and a material with relatively low cost and low strength may be applied to the non-load portion 12, so that the outer ring 10 composed of multiple arc segments is divided into the load portion 11 and the non-load portion 12, which not only satisfies the load requirement of the ball bearing in the load region, but also reduces the cost of the ball bearing.

Further, in some embodiments, when the material of the load portion 11 and the material of the non-load portion 12 are the same, the arc length of the load portion 11 is greater than the arc length of the non-load portion 12 (as shown in fig. 2), thereby increasing the material strength and load capacity of the load portion 11. Or when the material of the load portion 11 and the material of the non-load portion 12 are different, the arc length of the load portion 11 may be greater than or equal to the arc length of the non-load portion 12 (as shown in fig. 4), thereby further increasing the load capacity of the load portion 11 and avoiding deformation of the outer ring 10 at the load portion 11.

In the present embodiment, the load portion 11 is located at the lower side in the gravitational direction, and the non-load portion 12 is located at the upper side in the gravitational direction, which are merely exemplary. In other embodiments, the load portion 11 and the non-load portion 12 of the outer race 10 may be provided according to the location area of the load, for example, the non-load portion 12 may be located on the lower side, the load portion 11 may be located on the upper side, or the non-load portion 12 may be located on the left side, and the load portion 11 may be located on the right side. The load portion 11 and the non-load portion 12 may be provided in plural numbers, and may be provided at intervals or non-intervals depending on the position of the load.

Therefore, the outer ring 10 composed of the plurality of arc-shaped sections can be used for setting the positions of the load part 11 or the non-load part 12 of the outer ring 10 by setting the number of sections, the material strength or the lengths of different sections of the outer ring 10 according to the position area and the size of the load, is not only suitable for the computer tomography rack, but also can be used in other equipment according to the different load positions, and has wide application range, strong adaptability and low cost.

In some embodiments, the outer wall of the non-load portion 12 is provided with a coating. As is clear from the above, although the load capacity of the non-load portion 12 is smaller than that of the load portion 11, the non-load portion 12 still needs to provide a raceway for the balls 30 to support the rotation of the balls 30, and by providing a coating on the outer wall of the load portion 11, friction of the balls 30 against the raceway of the outer ring 10 can be avoided, and the service life of the outer ring 10 can be prolonged.

Further, the strength of the coating layer is the same as that of the material of the loading part 11, the kinds of materials used are reduced, and the anti-friction force of the outer wall of the non-loading part 12 is increased on the basis of the limited materials.

In the disclosed embodiment, the load portion 11 includes one (as shown in fig. 4) or a plurality of first arcuate segments 111 (as shown in fig. 2); and/or the unloaded portion 12 includes one (as shown in fig. 4) or a plurality of second arcuate segments (as shown in fig. 2).

Specifically, in some embodiments, the load portion 11 may be formed by a first arc-shaped segment 111, while the non-load portion 12 is also formed by an arc-shaped segment, where the arc length of the first arc-shaped segment 111 may be the same as (as shown in fig. 2) or may be different from the arc length of the second arc-shaped segment, which is not specifically limited herein.

In other embodiments, as shown in fig. 4, the load portion 11 includes two symmetrically disposed first arc segments 111; and/or the unloaded portion 12 comprises two symmetrically arranged second arc segments 121.

Specifically, the arc lengths of the two symmetrical first arc-shaped sections 111 are the same, and the arc lengths of the two symmetrical second arc-shaped sections 121 are also the same. The first arc-shaped section 111 and the second arc-shaped section 121 are symmetrically arranged along a longitudinal line in the gravity direction. In this way, the load portion 11 and the non-load portion 12 of the outer ring 10 can be more uniformly stressed, and the installation, the replacement and the maintenance are facilitated.

In some embodiments, the load portion 11 and the non-load portion 12 are integrally formed, and the gap 122 is provided at the non-load portion 12. As shown in fig. 5, in a third embodiment of the present disclosure, the outer ring 10 is formed of an arc-shaped section, and the entire outer ring 10 is integrally formed, but a gap 122 is provided at the non-load portion 12 of the outer ring 10. When the outer ring 10 is mounted in the outer bearing shaft, due to the existence of the gap 122, the diameter of the outer ring 10 can be reduced appropriately so as to facilitate the mounting of the outer ring 10, and after the outer ring 10 is mounted, the outer ring 10 returns to the original diameter so as to meet the radial R gap requirement between the outer wall of the outer ring 10 and the outer bearing seat 40.

In addition, in the present embodiment, the same material may be used for the load portion 11 and the non-load portion 12, but the non-load portion 12 has a material strength smaller than that of the load portion 11 due to the existence of the gap 122, but the arrangement of the gap 122 is not only convenient for the production and installation of the outer ring 10, but also can meet the requirement of the radial R gap between the outer wall of the outer ring 10 and the outer bearing seat 40.

In some embodiments, the ball bearing is a ball bearing or a roller bearing. The ball bearings and other bearings can be set according to different use environments, and the ball bearings are wide in optional types and range and convenient to produce and manufacture.

In summary, the outer ring 10 with the sectional structure makes the outer ring 10 no longer have a complete annular structure in the circumferential direction W, which is convenient for the production and assembly of the outer ring 10 on one hand, and on the other hand, the number of the arc segments, the material strength or the lengths of different segments can be set according to the position area and the size of the load, so that the application range is wide, the adaptability is strong, and the material cost can be reduced.

Based on the same inventive concept, the present disclosure provides a computer tomography gantry comprising: ball bearings, outer bearing housing 40 and inner bearing housing 50 as described above; the outer bearing seat 40 is in torsion-resistant connection with the outer ring 10 of the ball bearing; and the inner bearing housing 50 is in torsional connection with the inner race 20 of the ball bearing.

The inner bearing housing 50 rotates to drive the inner race 20 to rotate, and the inner bearing housing 50 and the inner race 20 are rotated relative to the outer race 10 and the outer bearing housing 40 by the balls 30.

As shown in fig. 1, a bed (not shown in the figure) may be disposed at the lower side of fig. 1, and the bed and the self gravity of the human body located on the bed may press the load area of the lower side of the ball bearing. Through setting up ball bearing's outer lane segmentation, can set up the segmentation number of arc section, material strength or the length of different sections according to the position area and the size of load, the range of application is wide, and adaptability is strong, can also reduce material cost.

The specific manner in which the functions implemented in the computer tomograph of the above embodiments have been described in detail in connection with the embodiments of the ball bearing, will not be explained in detail here.

It is understood that the term "plurality" in this disclosure means two or more, and other adjectives are similar thereto. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. The singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It is further understood that the terms "not," "not," and the like are used to describe various structures, but these structures should not be limited to these terms. These terms are only used to distinguish one type of structure from another and do not indicate a particular order or importance. Indeed, the expressions "not", "not" and the like are entirely interchangeable. For example, an unstructured may also be referred to as an unstructured, and similarly, an unstructured may also be referred to as an unstructured, without departing from the scope of the present disclosure.

It will be further understood that the terms "center," "longitudinal," "transverse," "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience in describing the present embodiments and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation.

It will be further understood that "connected" includes both direct connection where no other member is present and indirect connection where other element is present, unless specifically stated otherwise.

It will be further understood that although operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims (9)

1.A ball bearing, comprising:

an outer race (10), an inner race (20), and balls (30) located between the outer race (10) and the inner race (20);

The outer ring (10) is of a sectional structure formed by one or more arc-shaped sections along the circumferential direction (W) of the ball bearing.

2. The ball bearing of claim 1 wherein the ball bearing is configured to rotate about a rotational axis,

The ball bearing includes: a load region and a non-load region,

The outer ring (10) comprises: a load portion (11) corresponding to the load region of the ball bearing; an unloaded portion (12) corresponding to the unloaded region of the ball bearing;

Wherein the material strength of the loading part (11) is greater than the material strength of the unloading part (12).

3. The ball bearing of claim 2 wherein the ball bearing is configured to rotate about a rotational axis,

The arc length of the load part (11) is greater than or equal to the arc length of the non-load part (12).

4. The ball bearing of claim 3 wherein the ball bearing is,

The outer wall of the non-load part (12) is provided with a coating, and the strength of the coating is the same as the material strength of the load part (11).

5. The ball bearing of claim 2 wherein the ball bearing is configured to rotate about a rotational axis,

The load portion (11) comprises one or more first arcuate segments (111); and/or

The non-load portion (12) comprises one or more second arcuate segments (121).

6. The ball bearing of claim 5 wherein the ball bearing is configured to rotate about a rotational axis,

The load part (11) comprises two symmetrically arranged first arc-shaped sections (111); and/or

The non-load portion (12) comprises two symmetrically arranged second arc-shaped segments (121).

7. The ball bearing of claim 2 wherein the ball bearing is configured to rotate about a rotational axis,

The load part (11) and the non-load part (12) are integrally formed, and a gap (122) is formed in the non-load part (12).

8. The ball bearing of claim 1 wherein the ball bearing is configured to rotate about a rotational axis,

The ball bearing is a ball bearing or a roller bearing.

9. An electronic computer tomography gantry, comprising:

The ball bearing of any one of claims 1 to 8;

An outer bearing block (40) which is connected to the outer ring (10) of the ball bearing in a rotationally fixed manner; and

An inner bearing block (50) is connected in a rotationally fixed manner to the inner ring (20) of the ball bearing.