Radial spherical plain bearing
By designing an annular limiting groove and an adjustable limiting component in the radial joint bearing, the problem of the inability to adjust the rotational degrees of freedom in the prior art is solved, and the rotational degrees of freedom can be flexibly adjusted to meet the needs of different working conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2026-03-27
AI Technical Summary
Existing radial joint bearings cannot adjust the number of rotational degrees of freedom, lack flexibility, and cannot adapt to the needs of different working conditions.
A radial spherical bearing was designed. By opening an annular limiting groove on the outer spherical surface of the inner ring and equipping it with an adjustable limiting component, the limiting component can switch between two states: being engaged in and disengaged from the annular limiting groove, thereby adjusting the rotational degrees of freedom of the inner ring.
It enables flexible adjustment of the rotational degrees of freedom of the radial joint bearing, which can adapt to the needs of different working conditions and improve its applicability.
Smart Images
Figure CN121739007A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of bearings, in particular to a radial spherical plain bearing. BACKGROUND
[0002] The radial spherical plain bearing is a key component in mechanical equipment, which mainly realizes that the component has multiple rotational degrees of freedom while bearing load, and can rotate or swing around different shafts. However, in some special application conditions, the component only needs two rotational degrees of freedom, and the remaining rotational degrees of freedom need to be limited. However, the existing ordinary radial spherical plain bearing cannot adjust the number of rotational degrees of freedom, and lacks flexibility in adjusting the number of rotational degrees of freedom. SUMMARY
[0003] In view of the defects of the prior art, the present application provides a radial spherical plain bearing, which mainly solves the technical problem that the number of rotational degrees of freedom of the existing radial spherical plain bearing cannot be adjusted.
[0004] To achieve the above-mentioned purpose, the present application is realized by the following technical scheme: A radial spherical plain bearing, comprising an inner ring and an outer ring which are matched with each other, a ring-shaped limiting groove is formed on the outer spherical surface of the inner ring, and a limiting piece is movably arranged on the outer ring to cooperate with the ring-shaped limiting groove of the inner ring to adjust the number of rotational degrees of freedom of the inner ring relative to the outer ring. The limiting piece is configured to be switched and adjusted between a first state position of being clamped into the ring-shaped limiting groove and a second state position of being withdrawn from the ring-shaped limiting groove, and the number of rotational degrees of freedom of the inner ring relative to the outer ring is adjusted by clamping the limiting piece into the ring-shaped limiting groove to form a limiting cooperation.
[0005] Further, at least part of the limiting piece clamped into the ring-shaped limiting groove is in a cylindrical structure, and the central axis A of the cylindrical structure part of the limiting piece is configured to pass through the spherical center of the inner spherical surface of the outer ring and be perpendicular to the central axis B of the inner spherical surface of the outer ring, so that when the limiting piece is adjusted to the first state position relative to the outer ring and is clamped into the ring-shaped limiting groove of the inner ring, the inner ring can only rotate around the central axis A of the cylindrical structure part of the limiting piece and rotate around the central axis B of the inner spherical surface of the outer ring under the limiting cooperation of the limiting piece and the ring-shaped limiting groove.
[0006] Further, a radial through hole is formed at the peripheral surface of the outer ring, the limiting member is movably embedded in the through hole, and a communication hole is formed at the end surface of the outer ring and communicates with the through hole, a positioning pin is installed in the communication hole, and the limiting member is formed with a first limiting portion and a second limiting portion for limiting cooperation with the positioning pin, so that when the positioning pin and the first limiting portion of the limiting member form limiting cooperation, the limiting member is positioned relative to the outer ring in the first state position of being clamped into the annular limiting groove, and when the positioning pin and the second limiting portion of the limiting member form limiting cooperation, the limiting member is positioned relative to the outer ring in the second state position of being withdrawn from the annular limiting groove.
[0007] Further, a positioning groove is formed at the peripheral surface of the limiting member, and the positioning groove forms a second limiting portion for limiting cooperation with the positioning pin to position the limiting member in the second state position.
[0008] Further, the outer end surface of the limiting member forms a first limiting portion for limiting cooperation of the positioning pin to position the limiting member in the first state position.
[0009] Further, the positioning pin includes a connecting section matched with the communication hole and a positioning head provided at the head of the connecting section for limiting cooperation with the first limiting portion or the second limiting portion of the limiting member.
[0010] Further, the communication hole is a threaded hole structure, the connecting section is a threaded column structure, and the connecting section and the communication hole are screwed together.
[0011] Further, the positioning groove is an annular groove structure, the annular limiting groove is formed at the equatorial line position of the outer spherical surface of the inner ring, two limiting members are provided on the outer ring, and the two limiting members are arranged in a central symmetric manner on the outer ring.
[0012] Further, the annular limiting groove is provided with a slope for ejecting the limiting member, the highest side of the slope extends to the outer spherical surface of the inner ring, and the lowest side of the slope extends to the groove bottom surface of the annular limiting groove.
[0013] Further, the annular limiting groove is provided with two oppositely arranged slopes, and the highest sides of the two slopes are connected together.
[0014] The above technical solution has the following advantages or beneficial effects:
[0015] When the limiting piece is adjusted and positioned to the first state position of clamping into the annular limiting groove, the rotation freedom number of the inner ring relative to the outer ring is limited and adjusted by the limiting fit formed by the limiting piece clamping into the annular limiting groove, and when the limiting piece is adjusted and positioned to the second state position of exiting the annular limiting groove, the radial joint bearing can rotate or swing around different shafts like the common radial joint bearing, so that the radial joint bearing can produce the effect of flexible adjustment of the rotation freedom number, so as to better adapt to different use conditions. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a three-dimensional structural schematic view of the radial joint bearing of the embodiment of the present application.
[0017] Figure 2 is an exploded three-dimensional structural schematic view of the radial joint bearing of the embodiment of the present application.
[0018] Figure 3 is a structural cross-sectional view of the limiting piece relative to the outer ring in the first state position.
[0019] Figure 4 is a structural cross-sectional view of the limiting piece relative to the outer ring in the second state position.
[0020] REFERENCE NUMERALS:
[0021] 1, inner ring, 2, outer ring, 3, limiting piece, 4, positioning pin, 11, annular limiting groove, 12, inclined surface, 21, through hole, 22, communication hole, 31, positioning groove, 32, outer end face, 41, connecting section, 42, positioning head. DETAILED DESCRIPTION
[0022] The present application will be further described below in conjunction with the drawings and embodiments.
[0023] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0024] Please refer to the drawings Figure 1 to the drawings Figure 4In an embodiment of the present application, a radial joint bearing is provided, which comprises an inner ring 1 and an outer ring 2 matched with each other, a ring-shaped limiting groove 11 is formed on the outer spherical surface of the inner ring 1, and a limiting member 3 is movably arranged on the outer ring 2 and is configured to cooperate with the ring-shaped limiting groove 11 of the inner ring 1 to adjust the number of rotational degrees of freedom of the inner ring 1 relative to the outer ring 2. The limiting member 3 is configured to be switched and adjusted between a first state position of being clamped into the ring-shaped limiting groove 11 and a second state position of being withdrawn from the ring-shaped limiting groove 11. The limiting member 3 is clamped into the ring-shaped limiting groove 11 to form a limiting cooperation, thereby adjusting the number of rotational degrees of freedom of the inner ring 1 relative to the outer ring 2. It can be understood that, in the present embodiment, when the limiting member 3 is adjusted and positioned to the first state position of being clamped into the ring-shaped limiting groove 11, the limiting cooperation formed by the limiting member 3 clamped into the ring-shaped limiting groove 11 limits and adjusts the number of rotational degrees of freedom of the inner ring 1 relative to the outer ring 2 accordingly. When the limiting member 3 is adjusted and positioned to the second state position of being withdrawn from the ring-shaped limiting groove 11, the radial joint bearing can perform rotational movement or swinging movement around different axes, respectively, like a common radial joint bearing. In this way, the radial joint bearing can produce a good effect of flexible adjustment of the number of rotational degrees of freedom, so as to better adapt to different use conditions.
[0025] Please refer to the accompanying drawings Figure 1 to the accompanying drawings Figure 4 In a preferred embodiment, the limiting member 3 is at least in a cylindrical structure at the part clamped into the ring-shaped limiting groove 11. Preferably, in the present embodiment, the limiting member 3 is in a cylindrical structure as a whole, and the central axis A of the cylindrical structure part of the limiting member 3 is configured to pass through the spherical center of the inner spherical surface of the outer ring 2 and be perpendicular to the central axis B of the inner spherical surface of the outer ring 2. When the limiting member 3 is adjusted to the first state position relative to the outer ring 2 and is clamped into the ring-shaped limiting groove 11 of the inner ring 1, the inner ring 1 can only rotate around the central axis A of the cylindrical structure part of the limiting member 3 and the central axis B of the inner spherical surface of the outer ring 2 under the limiting cooperation of the limiting member 3 and the ring-shaped limiting groove 11. That is, through the limiting cooperation of the limiting member 3 and the ring-shaped limiting groove 11 of the inner ring 1, the inner ring 1 can only perform axial rotational movement around the central axis B of the inner spherical surface of the outer ring 2 and the central axis A of the cylindrical structure part of the limiting member 3 perpendicular to the central axis B of the inner spherical surface of the outer ring 2, and the number of rotational degrees of freedom of the joint bearing is adjusted to two.
[0026] Please refer to the accompanying drawings Figure 1 to the accompanying drawings Figure 4In one preferred embodiment, a radial through hole 21 is formed on the peripheral surface of the outer ring 2, and the limiting member 3 is movably embedded in the through hole 21. A communication hole 22 is formed on the end surface of the outer ring 2 and is in communication with the through hole 21. A positioning pin 4 is installed in the communication hole 22. The limiting member 3 is provided with a first limiting portion and a second limiting portion for limiting cooperation with the positioning pin 4. When the positioning pin 4 is in limiting cooperation with the first limiting portion of the limiting member 3, the limiting member 3 is positioned at the first state position of being clamped into the annular limiting groove 11 relative to the outer ring 2. When the positioning pin 4 is in limiting cooperation with the second limiting portion of the limiting member 3, the limiting member 3 is positioned at the second state position of being withdrawn from the annular limiting groove 11 relative to the outer ring 2. Preferably, a positioning groove 31 is formed on the peripheral surface of the limiting member 3, which forms the second limiting portion for limiting cooperation with the positioning pin 4 to position the limiting member 3 at the second state position. In one preferred embodiment, the outer end surface 32 of the limiting member 3 forms the first limiting portion for limiting cooperation with the positioning pin 4 to position the limiting member 3 at the first state position. However, those skilled in the art should understand that in other embodiments, two positioning groove structures corresponding to the first state position and the second state position can be formed on the peripheral surface of the limiting member 3, and the limiting member 3 is positioned at the first state position or the second state position through limiting cooperation of the corresponding positioning groove structure.
[0027] Please refer to the accompanying drawings Figure 1 to the accompanying drawings Figure 4 In one preferred embodiment, the positioning pin 4 includes a connecting segment 41 matched with the communication hole 22 and a positioning head 42 provided on the head of the connecting segment 41 for limiting cooperation with the first limiting portion or the second limiting portion of the limiting member 3. Preferably, the communication hole 22 is a threaded hole structure, and the connecting segment 41 is a threaded column structure. The connecting segment 41 is screwed and matched with the communication hole 22. The positioning groove 31 is an annular groove structure, and the annular limiting groove 11 is formed on the equatorial line position of the outer spherical surface of the inner ring 1. However, those skilled in the art should understand that in other embodiments, two limiting members 3 can be provided on the outer ring 2, and the two limiting members 3 are arranged in a central symmetric manner on the outer ring 2 and correspond to the annular limiting groove 11.
[0028] Please refer to the accompanying drawings Figure 1 In one preferred embodiment, the annular limiting groove 11 is provided with a slope 12 for ejecting the limiting member 3. The highest side of the slope 12 extends to the outer spherical surface of the inner ring 1, and the lowest side of the slope 12 extends to the groove bottom surface of the annular limiting groove 11. Further, the annular limiting groove 11 is provided with two oppositely arranged slopes 12, and the highest sides of the two slopes 12 are connected together. In this way, no matter the inner ring 1 is rotated to the highest side of the slope 12 in the forward direction or in the reverse direction, the limiting member 3 clamped into the annular limiting groove 11 can be ejected to contact the limiting member 3 to limit the number of rotation degrees of the inner ring.
[0029] The above description is only used to illustrate the technical solutions of the present application, and is not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent ones; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, so all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.
Claims
1. A radial spherical plain bearing, comprising an inner ring (1) and an outer ring (2) that are adapted to each other, characterized in that: An annular limiting groove (11) is provided on the outer spherical surface of the inner ring (1), and a limiting member (3) is provided on the outer ring (2) to cooperate with the annular limiting groove (11) of the inner ring (1) to adjust the rotational degree of freedom of the inner ring (1) relative to the outer ring (2).
2. The radial spherical bearing according to claim 1, characterized in that: The limiting member (3) is configured to switch between a first state position in which it is engaged with the annular limiting groove (11) and a second state position in which it is disengaged from the annular limiting groove (11) relative to the outer ring (2). The limiting member (3) is engaged with the annular limiting groove (11) to form a limiting fit, thereby adjusting the rotational degrees of freedom of the inner ring (1) relative to the outer ring (2).
3. The radial spherical bearing according to claim 2, characterized in that: The limiting member (3) has a cylindrical structure at least in the part that is inserted into the annular limiting groove (11), and the central axis A of the cylindrical part of the limiting member (3) is configured to pass through the center of the inner sphere of the outer ring (2) and be perpendicular to the central axis B of the inner sphere of the outer ring (2). When the limiting member (3) is adjusted to the first state position relative to the outer ring (2) and fits into the annular limiting groove (11) of the inner ring (1), the inner ring (1) can only rotate relative to the outer ring (2) around the central axis A of the cylindrical part of the limiting member (3) and rotate around the central axis B of the inner sphere of the outer ring (2) under the limiting cooperation of the limiting member (3) and the annular limiting groove (11).
4. The radial spherical bearing according to claim 2, characterized in that: A radial through hole (21) is provided on the circumferential surface of the outer ring (2). The limiting member (3) is movably embedded in the through hole (21). A connecting hole (22) connected to the through hole (21) is provided on the end face of the outer ring (2). A positioning pin (4) is installed in the connecting hole (22). The limiting member (3) has a first limiting part and a second limiting part for limiting engagement with the positioning pin (4). When the positioning pin (4) and the first limiting part of the limiting member (3) form a limiting engagement, the limiting member (3) is positioned relative to the outer ring (2) in the first state position of being inserted into the annular limiting groove (11). When the positioning pin (4) and the second limiting part of the limiting member (3) form a limiting engagement, the limiting member (3) is positioned relative to the outer ring (2) in the second state position of being removed from the annular limiting groove (11).
5. The radial joint bearing according to claim 4, characterized in that: A positioning groove (31) is provided on the circumferential surface of the limiting member (3). The positioning groove (31) forms a second limiting part for limiting cooperation with the positioning pin (4) to position the limiting member (3) in the second state position. The outer end face (32) of the limiting member (3) forms a first limiting part for limiting cooperation with the positioning pin (4) to position the limiting member (3) in the first state position.
6. The radial spherical bearing according to claim 5, characterized in that: The positioning pin (4) includes a connecting section (41) that mates with the connecting hole (22) and a positioning head (42) located at the head of the connecting section (41) for positioning engagement with the first or second limiting part of the limiting member (3).
7. The radial spherical bearing according to claim 6, characterized in that: The connecting hole (22) is a screw hole structure, and the connecting section (41) is a stud structure. The connecting section (41) and the connecting hole (22) are screwed together.
8. The radial spherical bearing according to claim 1, characterized in that: The annular limiting groove (11) is located at the equator of the outer spherical surface of the inner ring (1); Preferably, two limiting members (3) are provided on the outer ring (2), and the two limiting members (3) are arranged in a centrally symmetrical manner on the outer ring (2).
9. The radial spherical plain bearing according to any one of claims 1 to 8, characterized in that: The annular limiting groove (11) is provided with an inclined surface (12) for ejecting the limiting member (3). The highest side of the inclined surface (12) extends to the outer spherical surface of the inner ring (1), and the lowest side of the inclined surface (12) extends to the bottom surface of the annular limiting groove (11).
10. The radial spherical bearing according to claim 9, characterized in that: The annular limiting groove (11) has two oppositely arranged inclined surfaces (12), and the highest side of the two inclined surfaces (12) is connected together.