Universal ball bearing and movable assembly

Abstract

The utility model relates to a universal ball bearing and a movable assembly, and relates to the technical field of bearings. The universal ball bearing comprises a first ball body, at least one ball assembly and a base, all the ball assemblies are sequentially arranged on the outer side of the first ball body in a sleeving mode, the first ball body is wrapped in the ball assembly on the innermost side, and at least part of the first ball body is kept to be exposed to the outer side of the ball assembly where the first ball body is located currently. The ball assemblies can rotate relative to the current ball assemblies under the action of external force; the base covers the peripheral side of the ball assembly on the outermost side and can rotate relative to the ball assembly under the action of external force; each ball assembly comprises an inner support and a plurality of second balls, each inner support is provided with a first containing cavity and a plurality of first through holes distributed in the circumferential side of the first containing cavity, the first balls are installed in the first containing cavity of the ball assembly on the innermost side, each first through hole communicates with the first containing cavity, and one second ball is correspondingly installed in the first through hole in a rotating mode. The sliding friction force of the universal ball bearing can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of bearings, and in particular to a universal ball bearing and a movable assembly. Background Art

[0002] Universal ball bearings can achieve various specified movements by rolling a large ball and a number of balls against each other. In the related art, the balls in universal ball bearings are generally close to each other and tend to gather together when subjected to eccentric force, affecting the rolling of the large ball in the universal ball bearing and increasing the friction coefficient. Summary of the invention

[0003] Based on this, it is necessary to provide a universal ball bearing and a movable assembly to address the problem in the related art that the balls are easily gathered together when subjected to eccentric force.

[0004] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0005] In a first aspect, an embodiment of the present application provides a universal ball bearing, comprising:

[0006] First Sphere;

[0007] At least one ball assembly, all of which are sequentially sleeved on the outside of the first sphere, the first sphere is covered by the innermost ball assembly and remains at least partially exposed to the outside of the current ball assembly, and can rotate relative to the current ball assembly under the action of external force;

[0008] A base, the base covering the outermost peripheral side of the ball assembly and being capable of rotating relative to the ball assembly under the action of an external force;

[0009] Among them, the ball assemblies all include an inner bracket and a plurality of second spheres, the inner bracket is provided with a first accommodating cavity and a plurality of first through holes distributed around the first accommodating cavity, the first sphere is installed in the first accommodating cavity of the innermost ball assembly, each of the first through holes is connected to the first accommodating cavity, and a corresponding second sphere is rotatably installed.

[0010] In one embodiment of the first aspect, at least part of the ball assembly further comprises a restriction layer, wherein the restriction layer is coated on the outer side of the inner bracket;

[0011] The restriction layer is provided with a second through hole corresponding to the first through hole, and the second through hole is penetrated on a side of the second sphere away from the first sphere. The restriction layer is used to limit an exposed area of ​​the side of the second sphere away from the first sphere.

[0012] In one of the embodiments of the first aspect, the ball assembly provided with the restriction layer also includes a plurality of connecting columns, one end of each of the connecting columns is connected to the inner bracket, the restriction layer is provided with a plurality of third through holes, and the connecting columns pass through the third through holes.

[0013] In one of the embodiments of the first aspect, the restriction layer includes a plurality of first restriction plates located on the peripheral side of the inner bracket and a second restriction plate located on the bottom side of the inner bracket, all of the first restriction plates are spliced ​​in sequence to form a ring structure, and the second restriction plates are spliced ​​with the bottom sides of each of the first restriction plates.

[0014] In one embodiment of the first aspect, the universal ball bearing further includes an end cover, and the end cover is installed on a side of the base that exposes the first sphere.

[0015] In one embodiment of the first aspect, all the first through holes of each inner bracket are arranged in layers along the axial direction of the base, and the distance between two adjacent first through holes in each layer is the same.

[0016] In one embodiment of the first aspect, each of the inner brackets is in a hemispherical structure, the base is correspondingly provided with a second accommodating cavity with a spherical structure, and the inner bracket of the outermost ball assembly is rotatably installed in the second accommodating cavity.

[0017] In one embodiment of the first aspect, the ball assemblies are provided in plurality, and two adjacent ball assemblies are rotatably engaged with each other.

[0018] In one embodiment of the first aspect, an outer diameter of the first sphere is greater than an outer diameter of the second sphere.

[0019] In a second aspect, an embodiment of the present application further provides a movable component, comprising the universal ball bearing described in any of the above embodiments.

[0020] Compared with the related art, the beneficial effect of the present application is as follows: the present application provides a universal ball bearing and a movable assembly, which can be used in various mechanical rotating parts. The universal ball bearing includes a first sphere, a ball assembly and a base, wherein the ball assembly includes an inner bracket and a plurality of second spheres, the first sphere is installed in the first accommodating cavity of the inner bracket of the innermost ball assembly, and the second sphere is installed in the first through hole of the inner bracket and abuts against the first sphere. In this way, during the operation of the universal ball bearing, the first sphere and the second sphere can roll relative to each other, and the second sphere will not be concentrated in one place under the restriction of the first through hole, so that the rolling of the second sphere is utilized to realize the rotation of the first sphere relative to the inner bracket, thereby reducing the sliding friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the shaft side structure of a universal ball bearing in some embodiments of the present application;

[0023] Figure 2 A schematic diagram of a top view of a universal ball bearing in some embodiments of the present application;

[0024] Figure 3 In some embodiments of this application Figure 2 AA cross-sectional structural diagram;

[0025] Figure 4 In some other embodiments of this application Figure 2 A`-A` cross-sectional structural diagram;

[0026] Figure 5 This is a schematic diagram of the structure of the ball assembly in some embodiments of the present application;

[0027] Figure 6 It is a schematic diagram of the structure of the ball assembly in some other embodiments of the present application;

[0028] Figure 7 This is a schematic diagram of the structure of the inner bracket in some embodiments of the present application;

[0029] Figure 8 This is a schematic diagram of the structure of the inner bracket in other embodiments of the present application;

[0030] Fig. 9 This is a schematic diagram of the structure of the restriction layer in some embodiments of the present application;

[0031] Fig.10 This is a schematic diagram of the structure of the first limiting plate and the second limiting plate in some embodiments of the present application.

[0032] Description of reference numerals:

[0033] 100, universal ball bearing; 110, first sphere; 120, ball assembly; 121, inner bracket; 1211, first accommodating cavity; 1212, first through hole; 122, second sphere; 123, restriction layer; 1231, first restriction plate; 1232, second restriction plate; 1233, second through hole; 1234, third through hole; 124, connecting column; 130, base; 131, second accommodating cavity; 140, end cover. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0036] In addition, if the term "and / or" appears, "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the objects associated before and after are in an "or" relationship. If the terms "first" and "second" appear, these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0038] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0040] In the related art, the balls in the universal ball bearing are mostly close to each other due to lack of restrictions. During operation, due to the influence of eccentric force, the balls are easily gathered together and cannot rotate, which increases the friction coefficient of the large ball in the middle, making it unable to rotate normally and causing serious wear.

[0041] To this end, the present application provides a universal ball bearing that can be used in various mechanical rotating parts. The universal ball bearing provided by the present application can limit the relative position between the balls and reduce the sliding friction of the large ball.

[0042] See also Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the universal ball bearing 100 includes a first sphere 110, at least one ball assembly 120 and a base 130. All ball assemblies 120 are sequentially sleeved on the outside of the first sphere 110, the first sphere 110 is covered in the innermost ball assembly 120, and remains at least partially exposed to the outside of the current ball assembly 120, and can rotate relative to the current ball assembly 120 under the action of external force. The base 130 is covered on the peripheral side of the outermost ball assembly 120, and can rotate relative to the ball assembly 120 under the action of external force.

[0043] See also Figure 5 and Figure 7As shown, the ball assembly 120 includes an inner bracket 121 and a plurality of second spheres 122. The inner bracket 121 is provided with a first accommodating cavity 1211 and a plurality of first through holes 1212 distributed around the first accommodating cavity 1211. The first sphere 110 is installed in the first accommodating cavity 1211 of the innermost ball assembly, and each first through hole 1212 is connected to the first accommodating cavity 1211 and has a second sphere 122 rotatably installed thereon.

[0044] Exemplarily, the first sphere 110 can be a metal ball. By installing the first sphere 110 in the first accommodating cavity 1211, the first sphere 110 can be freely rotated in the first accommodating cavity 1211, realizing the universal rotation function and performing steering in multiple directions. The number of ball assemblies 120 can be one, two, three, etc., which can be set according to actual needs. It can be understood that when multiple ball assemblies 120 are set, the multiple ball assemblies 120 are sequentially sleeved on the outside of the first sphere 110, and two adjacent ball assemblies 120 form a sliding fit through their respective second spheres 122. A ball assembly 120 in contact with the first sphere 110 is the innermost ball assembly 120, and a ball assembly 120 in contact with the base 130 is the outermost ball assembly 120.

[0045] In this embodiment, an example is given in which the number of the ball assembly 120 is one.

[0046] The second sphere 122 is what is referred to as a ball in the related art, and it can be a metal ball. The second sphere 122 is arranged in a one-to-one correspondence with the first through hole 1212, and a portion of the surface of the second sphere 122 is located in the first through hole 1212 and abuts against the first sphere 110, while a portion of the surface of the second sphere 122 on the side away from the first sphere 110 is exposed to the outside of the first through hole 1212 and abuts against the base 130. In this way, the second sphere 122 is confined between the first sphere 110 and the base 130 to prevent the second sphere 122 from falling off from the first through hole 1212, and the second sphere 122 can still roll relative to the first sphere 110 and the base 130.

[0047] The working principle of the universal ball bearing 100 provided in the present application is as follows: the two workpieces that are movably connected are respectively connected to the base 130 and the exposed outer portion of the first sphere 110, and during the relative rotation of the two workpieces, the first sphere 110 can perform a corresponding rotation operation. At this time, due to the abutment of the second sphere 122 with the first sphere 110, during the rotation of the first sphere 110, the second sphere 122 rolls synchronously, thereby reducing the friction of the first sphere 110 and improving the rotation accuracy of the workpiece, and the direct abutment and sliding of the first sphere 110 and the inner bracket 121 are replaced by the rolling of the second sphere 122.

[0048] See also Figure 4 and Figure 6 As shown, in some embodiments, at least part of the ball assembly 120 further includes a restriction layer 123, and the restriction layer 123 is coated on the outer side of the inner bracket 121. The restriction layer 123 is provided with a second through hole 1233 corresponding to the first through hole 1212, and the second through hole 1233 is penetrated on the side of the second sphere 122 away from the first sphere 110, and the restriction layer 123 is used to limit the exposed area of ​​the second sphere 122 away from the first sphere 110.

[0049] Exemplarily, the second through hole 1233 is arranged in a one-to-one correspondence with the first through hole 1212, and the correspondingly arranged second sphere 122 is located in both the first through hole 1212 and the second through hole 1233, and a portion of the surface of the second sphere 122 is exposed outside the second through hole 1233. On the basis of the inner bracket 121, the limiting layer 123 with a certain thickness can further block the surface of the second sphere 122, thereby limiting the contact area between the second sphere 122 and the base 130, adjusting the rolling rate of the second sphere 122, and thus adjusting the rotation accuracy of the first sphere 110.

[0050] See also Figure 6 and Figure 8 As shown, in some embodiments, the ball assembly 120 provided with a restriction layer 123 also includes a plurality of connecting columns 124, one end of each connecting column 124 is connected to the inner bracket 121, the restriction layer 123 is provided with a plurality of third through holes 1234, and the connecting columns 124 pass through the third through holes 1234.

[0051] For example, the number of the connecting posts 124 and the third through holes 1234 can be two, three, four, five, etc., which can be set according to actual needs. During the plug-in matching process between the connecting posts 124 and the third through holes 1234, the connecting posts 124 should be fully inserted into the third through holes 1234 to firmly install the restriction layer 123 on the outside of the inner bracket 121.

[0052] See also Fig. 9 and Fig.10 As shown, in some embodiments, the restriction layer 123 includes a plurality of first restriction plates 1231 located on the peripheral side of the inner bracket 121 and a second restriction plate 1232 located on the bottom side of the inner bracket 121. All the first restriction plates 1231 are spliced ​​in sequence to form a ring structure, and the second restriction plates 1232 are spliced ​​with the bottom sides of each first restriction plate 1231.

[0053] Exemplarily, the number of the first limiting plates 1231 may be two, three, four, five, etc., which may be set according to actual conditions. All the first limiting plates 1231 are spliced ​​in sequence to form an annular structure to cover the circumference of the inner bracket 121, and the second limiting plates 1232 are spliced ​​with the bottom side of the first limiting plates 1231 to cover the bottom side of the inner bracket 121. The first limiting plates 1231 and the second limiting plates 1232 are correspondingly provided with second through holes 1233 and third through holes 1234 to meet the requirements of limiting the second sphere 122 and assembling the limiting layer 123.

[0054] See also Figure 1 and Figure 2 As shown, in some embodiments, the universal ball bearing 100 further includes an end cover 140 , which is mounted on a side of the base 130 where the first sphere 110 is exposed.

[0055] See also Figure 3 and Figure 4 As shown, illustratively, after the first sphere 110 and the ball assembly 120 are placed in the base 130, the end cover 140 can be installed on the peripheral side of the first sphere 110, and the ball assembly 120 and the first sphere 110 are restricted by the end cover 140 to prevent the first sphere 110 and the ball assembly 120 from falling out of the base 130.

[0056] See also Figure 5 and Figure 6 As shown, in some embodiments, all the first through holes 1212 of each inner bracket 121 are arranged in layers along the axial direction of the base 130, and the intervals between two adjacent first through holes 1212 in each layer are the same.

[0057] For example, for ease of understanding, the present application may define the direction in which the first sphere 110 is exposed to the outside as the upper direction, and the direction in which the first sphere 110 is located inside the base 130 as the lower direction. The first through holes 1212 are arranged in layers along the up and down directions of the axis of the base 130, and in two adjacent layers, the number of the first through holes 1212 located in the upper layer is greater than the number of the first through holes 1212 in the lower layer. Through the layered arrangement of the first through holes 1212, the second sphere 122 completely covers the surface of the first sphere 110 located inside the base 130, and the second spheres 122 arranged at equal distances in each layer rotate at a synchronized rate, thereby improving the rotation accuracy of the first sphere 110.

[0058] See also Figure 3 and Figure 4 As shown, in some embodiments, each inner bracket 121 is a hemispherical structure, the base 130 is correspondingly provided with a second accommodating cavity 131 with a spherical structure, and the inner bracket 121 of the outermost ball assembly 120 is rotatably installed in the second accommodating cavity 131 .

[0059] Exemplarily, half of the first sphere 110 is located in the first accommodating cavity 1211, and the inner bracket 121 is correspondingly set to a hemispherical structure to cover half of the surface of the first sphere 110. After the second sphere 122 is installed in the first through hole 1212, the second sphere 122 abuts against the surface of the first sphere 110. Correspondingly, the bottom is correspondingly provided with a second accommodating cavity 131 with a hemispherical structure, so that the inner bracket 121 is installed in the second accommodating cavity 131, and at the same time, the side of the second sphere 122 away from the first sphere 110 abuts against the inner wall surface of the second accommodating cavity 131, so that the second sphere 122 can roll freely. The rolling of the second sphere 122 reduces the sliding friction of the first sphere 110.

[0060] In some embodiments, a plurality of ball assemblies 120 are provided, and two adjacent ball assemblies 120 are rotatably matched.

[0061] For example, the rotation accuracy of the universal ball bearing 100 can be further adjusted by providing a plurality of ball assemblies 120 , wherein the ball assemblies 120 are arranged in sequence, and two adjacent ball assemblies 120 achieve relative rotation between the ball assemblies 120 through the rolling of their respective second spheres 122 .

[0062] See also Figure 3 and Figure 4 As shown, in some embodiments, the outer diameter of the first sphere 110 is greater than the outer diameter of the second sphere 122 .

[0063] Exemplarily, the size of the second sphere 122 is smaller than that of the first sphere 110, so that during the rotation of the first sphere 110, the second sphere 122 has a higher rotation speed, reducing sliding friction. When the size of the second sphere 122 is smaller, the rotation speed of the bearing can be increased, but the corresponding load-bearing capacity is reduced. In actual situations, the size ratio of the first sphere 110 to the second sphere 122 can be adjusted accordingly.

[0064] The embodiment of the present application further provides a movable assembly, comprising the universal ball bearing 100 in any of the above embodiments.

[0065] Exemplarily, the movable components may be movable parts in auxiliary equipment such as a transmission system, a feeding system, a processing system, a processing machine, and a packaging machine, such as joints of various robots.

[0066] This embodiment has the universal ball bearing 100 in any of the above embodiments, and therefore has all the beneficial effects of the universal ball bearing 100 in any of the above embodiments, which will not be described in detail here.

[0067] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A universal ball bearing, characterized in that: include: First Sphere; At least one ball assembly, all of which are sequentially sleeved on the outside of the first sphere, the first sphere is covered by the innermost ball assembly and remains at least partially exposed to the outside of the current ball assembly, and can rotate relative to the current ball assembly under the action of external force; A base, the base covering the outermost peripheral side of the ball assembly and being capable of rotating relative to the ball assembly under the action of an external force; Among them, the ball assemblies all include an inner bracket and a plurality of second spheres, the inner bracket is provided with a first accommodating cavity and a plurality of first through holes distributed around the first accommodating cavity, the first sphere is installed in the first accommodating cavity of the innermost ball assembly, each of the first through holes is connected to the first accommodating cavity, and a corresponding second sphere is rotatably installed.

2. The universal ball bearing according to claim 1, characterized in that: At least part of the ball assembly further comprises a restriction layer, wherein the restriction layer is coated on the outer side of the inner bracket; The restriction layer is provided with a second through hole corresponding to the first through hole, and the second through hole is penetrated on a side of the second sphere away from the first sphere. The restriction layer is used to limit an exposed area of ​​the side of the second sphere away from the first sphere.

3. The universal ball bearing according to claim 2, characterized in that: The ball assembly provided with the restriction layer further includes a plurality of connecting columns, one end of each of the connecting columns is connected to the inner bracket, the restriction layer is provided with a plurality of third through holes, and the connecting columns pass through the third through holes.

4. The universal ball bearing according to claim 2, characterized in that: The restriction layer includes a plurality of first restriction plates located on the peripheral side of the inner bracket and a second restriction plate located on the bottom side of the inner bracket. All the first restriction plates are spliced ​​in sequence to form a ring structure, and the second restriction plates are spliced ​​with the bottom sides of each of the first restriction plates.

5. The universal ball bearing according to claim 1, characterized in that: The universal ball bearing further comprises an end cover, and the end cover is mounted on a side of the base exposing the first sphere.

6. The universal ball bearing according to claim 1, characterized in that: All the first through holes of each inner bracket are arranged in layers along the axial direction of the base, and the distance between two adjacent first through holes in each layer is the same.

7. The universal ball bearing according to claim 1, characterized in that: Each of the inner brackets is in a hemispherical structure, and the base is correspondingly provided with a second accommodating cavity with a spherical structure, and the inner bracket of the outermost ball assembly is rotatably installed in the second accommodating cavity.

8. The universal ball bearing according to claim 1, characterized in that: The ball assemblies are provided in plurality, and two adjacent ball assemblies are rotatably matched.

9. The universal ball bearing according to claim 1, characterized in that: The outer diameter of the first sphere is greater than the outer diameter of the second sphere.

10. An active component, characterized in that: The invention comprises a universal ball bearing as claimed in any one of claims 1 to 9.

Images