Semi-open type solid self-lubricating knuckle bearing

Abstract

The utility model provides a semi-open type solid self-lubricating knuckle bearing. The semi-open type solid self-lubricating knuckle bearing comprises a bearing inner ring, a first outer ring and a second outer ring, a through hole penetrating through the bearing inner ring is formed in the bearing inner ring, and a solid self-lubricating material is embedded in the through hole; the first outer ring is arranged on the outer side of the bearing inner ring, and the contact surface between the inner surface of the first outer ring and the outer surface of the bearing inner ring is a cylindrical curved surface; the second outer ring is arranged on the outer side of the first outer ring, and the contact surface between the outer surface of the first outer ring and the inner surface of the second outer ring is a spherical surface; the two ends of the bearing inner ring, the first outer ring and the second outer ring in the circumferential direction of the knuckle bearing are each provided with an opening, the openings are semicircular, and the inner surface of the bearing inner ring and the outer surface of the second outer ring are cylindrical curved surfaces. According to the knuckle bearing provided by the embodiment of the invention, the structure of the knuckle bearing can be simplified, the knuckle bearing is convenient to mount and maintain, and the maintenance cost of the knuckle bearing is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of bearings, and more specifically, to a semi-open solid self-lubricating spherical bearing. Background Art

[0002] Spherical plain bearings are a type of spherical sliding bearings, generally consisting of an outer ring with an inner spherical surface, an inner ring with an outer spherical surface, and a lubricating pad between the outer and inner rings. Under the lubrication of the lubricating pad, the inner and outer rings of the spherical plain bearing can rotate and swing relative to each other within a certain angle range, thereby playing a self-aligning role in mechanical equipment.

[0003] During the use of spherical bearings, the lubricating pads will be damaged and worn under the action of the inner and outer rings of the spherical bearings, thus affecting the performance of the spherical bearings. Therefore, during the use of spherical bearings, it takes a lot of manpower and time to regularly disassemble and maintain the spherical bearings, such as replacing the lubricating pads, which increases the maintenance cost of the spherical bearings. Utility Model Content

[0004] The present application provides a semi-open solid self-lubricating spherical plain bearing, which can simplify the structure of the spherical plain bearing, facilitate the installation and maintenance of the spherical plain bearing, and reduce the maintenance cost of the spherical plain bearing.

[0005] In a first aspect, a semi-open solid self-lubricating spherical bearing is provided, comprising: a bearing inner ring, the bearing inner ring is provided with at least one through hole penetrating the inner and outer surfaces of the bearing inner ring, and a solid self-lubricating material is embedded in the through hole; a first outer ring, the first outer ring is arranged on the outer side of the bearing inner ring, and the contact surface between the inner surface of the first outer ring and the outer surface of the bearing inner ring is a cylindrical surface; a solid self-lubricating material is arranged between the outer surface of the first outer ring and the inner surface of the second outer ring; a second outer ring, the second outer ring is arranged on the outer side of the first outer ring, and the outer surface of the first outer ring and the inner surface of the second outer ring The contact surface between them is a spherical surface; the bearing inner ring, the first outer ring and the second outer ring are respectively provided with openings at both ends along the circumference of the joint bearing, and the openings are used to fix the joint bearing on the bearing seat through a pressure block. The outer contour of the joint bearing along the circumference of the joint bearing is a semicircular arc shape, and the middle of the two ends of the joint bearing along the circumference is respectively provided with openings, and the projection of the opening on the target plane is a semicircle. The target plane is parallel to the tangent planes at both ends of the inner surface of the bearing inner ring along the circumference or the tangent planes at both ends of the outer surface of the second outer ring along the circumference. The inner surface of the bearing inner ring and the outer surface of the second outer ring are cylindrical surfaces.

[0006] In the embodiment of the present application, by embedding a solid self-lubricating material in the through hole of the inner ring of the bearing, a stable protective film can be formed on the sliding contact surface during the relative movement of the inner ring of the bearing and the second outer ring to achieve a lubricating effect. Compared with the lubrication method of setting a lubricating pad between the inner ring of the bearing and the second outer ring, the structure of the spherical bearing can be simplified, the installation and maintenance of the spherical bearing can be facilitated, and the maintenance cost of the spherical bearing can be reduced.

[0007] On the other hand, by designing the spherical bearings, especially large spherical bearings such as spherical bearings with an inner diameter greater than 200.0 mm, as semicircular rings, the weight of the spherical bearings can be greatly reduced while ensuring the functions of the spherical bearings, such as the self-aligning function, which facilitates the installation and maintenance of the spherical bearings and also reduces the cost of the spherical bearings.

[0008] In combination with the first aspect, in certain implementations of the first aspect, a solid self-lubricating material is arranged between the outer surface of the first outer ring and the inner surface of the second outer ring (120), including: a through hole or a blind hole is arranged on the outer surface of the first outer ring, and a solid self-lubricating material is arranged in the through hole or the blind hole.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the spherical bearing also includes a third outer ring, which is arranged on the outside of the second outer ring, the contact surface between the inner surface of the third outer ring and the outer surface of the second outer ring is a cylindrical surface, the outer surface of the third outer ring is a spherical surface, and the outer surface of the third outer ring is provided with a through hole or a blind hole, and a solid self-lubricating material is provided in the through hole or the blind hole.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the through holes are arranged along the radial direction of the spherical surface, and the sum of the areas of the through holes is greater than 20% of the inner surface area of ​​the bearing inner ring.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the first outer ring includes a first main body and a first protrusion, and the first protrusion is arranged at both ends of the first main body along the radial direction of the joint bearing and protrudes from the inner surface of the first main body, so that when the bearing inner ring is installed, the bearing inner ring is pushed and installed to the inner surface of the first outer ring along the circumferential direction, and both ends of the bearing inner ring along the radial direction of the joint bearing are at least partially in contact with the first protrusion to limit the axial movement of the bearing inner ring in the joint bearing.

[0012] In combination with the first aspect, in certain implementations of the first aspect, a width B of the bearing inner ring along the spherical bearing is 50.0 mm to 250.0 mm.

[0013] In combination with the first aspect, in certain implementations of the first aspect, a width C1 of the first outer ring is 60.0 mm to 260.0 mm, and a width C4 of the first protrusion is 5.0 mm to 10.0 mm.

[0014] In combination with the first aspect, in certain implementations of the first aspect, a width C2 of the second outer ring is 85.0 mm to 150.0 mm.

[0015] In combination with the first aspect, in certain implementations of the first aspect, a width C3 of the third outer ring is 95.0 mm to 260.0 mm.

[0016] In combination with the first aspect, in certain implementations of the first aspect, the diameter of the cylindrical curved surface of the inner surface of the bearing inner ring is 150.0 mm-600.0 mm, and the thickness of the bearing inner ring is 10.0 mm-30.0 mm.

[0017] In combination with the first aspect, in certain implementations of the first aspect, the ball diameter of the outer surface of the first outer ring and the ball diameter of the inner surface of the second outer ring are both 200.0 mm-500.0 mm.

[0018] In combination with the first aspect, in certain implementations of the first aspect, the diameter of the cylindrical curved surface of the outer surface of the second outer ring is 300.0 mm-700.0 mm.

[0019] In combination with the first aspect, in certain implementations of the first aspect, the diameter of the semicircular opening is 60.0 mm-150.0 mm.

[0020] In combination with the first aspect, in certain implementations of the first aspect, a maximum value of an inclination angle α generated by sliding of the first outer ring relative to the second outer ring is in a range of 5° to 70°. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a semi-open solid self-lubricating spherical plain bearing provided in one embodiment of the present application.

[0022] Figure 2 It is a schematic diagram of the partial structure of one radial end of a semi-open solid self-lubricating spherical plain bearing provided in one embodiment of the present application.

[0023] Figure 3 It is a structural schematic diagram of a semi-open solid self-lubricating spherical plain bearing provided in another embodiment of the present application.

[0024] Figure 4 It is a schematic diagram of the partial structure of one radial end of a semi-open solid self-lubricating spherical plain bearing provided in another embodiment of the present application.

[0025] Figure 5 yes Figure 3 A cross-sectional view of the BB' surface of the spherical plain bearing is provided.

[0026] Figure 6 yes Figure 3Provided are cross-sectional views of the A-A' and BB' surfaces of the inner ring of the spherical plain bearing.

[0027] Figure 7 yes Figure 3 Cross-sectional views of the AA' surface and the BB' surface of the first outer ring of the spherical plain bearing are provided.

[0028] Figure 8 yes Figure 3 Cross-sectional views of the A-A' surface and the BB' surface of the second outer ring of the spherical plain bearing are provided.

[0029] Fig. 9 yes Figure 3 Cross-sectional views of the A-A' surface and the BB' surface of the third outer ring of the spherical plain bearing are provided.

[0030] Reference numerals:

[0031] Bearing inner ring: 112, second outer ring: 120, opening: 130, through hole: 111, bearing inner ring: 112, first outer ring: 113, first body: 1131, first protrusion: 1132, third outer ring: 140, second body: 141, second protrusion: 142. DETAILED DESCRIPTION

[0032] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0033] In the description of the embodiments of the present application, "at least one" means one or more, and "plurality" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or C2 can represent: a, b, C2, ab, a-C2, b-C2, or ab-C2, where a, b, and C2 can be single or multiple.

[0034] The prefixes such as "first" and "second" used in the embodiments of the present application are only used to distinguish different description objects, and have no limiting effect on the position, order, priority, quantity or content of the described objects. The use of prefixes such as ordinal numbers used to distinguish description objects in the embodiments of the present application does not constitute a limitation on the described objects. For the statement of the described objects, please refer to the description in the context of the claims or embodiments, and the use of such prefixes should not constitute an unnecessary limitation.

[0035] Spherical plain bearings are a type of spherical sliding bearings, generally consisting of an outer ring with an inner spherical surface, an inner ring with an outer spherical surface, and a lubricating pad between the outer and inner rings. Under the lubrication of the lubricating pad, the inner and outer rings of the spherical plain bearing can rotate and swing relative to each other within a certain angle range, thereby playing a self-aligning role in mechanical equipment.

[0036] During the use of spherical bearings, the lubricating pads will be damaged and worn under the action of the inner and outer rings of the spherical bearings, thus affecting the performance of the spherical bearings. Therefore, during the use of spherical bearings, it takes a lot of manpower and time to regularly disassemble and maintain the spherical bearings, such as replacing the lubricating pads, which increases the maintenance cost of the spherical bearings.

[0037] In response to the above problems, the present application provides a semi-open solid self-lubricating spherical bearing, which includes: a bearing inner ring, the bearing inner ring is provided with at least one through hole penetrating the inner and outer surfaces of the bearing inner ring, and solid self-lubricating material is inlaid in the through hole; a second outer ring, the second outer ring is arranged on the outside of the bearing inner ring, and the contact surface between the outer surface of the bearing inner ring and the inner surface of the second outer ring is a spherical surface; the outer contour of the spherical bearing along the circumference of the spherical bearing is a semicircular arc, and the middle parts of the two ends of the spherical bearing along the circumference are respectively provided with openings, and the projection of the openings on the target plane is a semicircle, and the target plane is parallel to the cross-sections of the inner surface of the bearing inner ring at both ends along the circumference or the cross-sections of the outer surface of the second outer ring at both ends along the circumference, and the inner surface of the bearing inner ring and the outer surface of the second outer ring are cylindrical surfaces.

[0038] The semi-open solid self-lubricating spherical plain bearing provided in the embodiment of the present application can simplify the structure of the spherical plain bearing, facilitate the installation and maintenance of the spherical plain bearing, and reduce the maintenance cost of the spherical plain bearing. Figure 1 A schematic diagram of a semi-open solid self-lubricating spherical plain bearing provided in an embodiment of the application.

[0039] The spherical plain bearing comprises a bearing inner ring 112 , a first outer ring 113 and a second outer ring 120 .

[0040] The bearing inner ring 112 is provided with at least one through hole 111 penetrating the inner and outer surfaces of the bearing inner ring, and the through hole 111 is inlaid with solid self-lubricating material; the first outer ring 113 is arranged on the outer side of the bearing inner ring 112, and the contact surface between the inner surface of the first outer ring 113 and the outer surface of the bearing inner ring 112 is a cylindrical surface; the second outer ring 120 is arranged on the outer side of the first outer ring 113, and the contact surface between the outer surface of the first outer ring 113 and the inner surface of the second outer ring 120 is a spherical surface. The outer contour of the spherical bearing along the circumference of the spherical bearing is a semicircular arc. Openings 130 are respectively provided in the middle of the two ends of the spherical bearing along the circumference. The openings 130 are used to fix the spherical bearing on the bearing seat (not shown in the figure) through a pressure block. The projection of the opening 130 on the target plane is a semicircle. The target plane is parallel to the cross-sections of the inner surface of the bearing inner ring 112 at both ends along the circumference or the cross-sections of the outer surface of the second outer ring 120 at both ends along the circumference. The inner surface of the bearing inner ring 112 and the outer surface of the second outer ring 120 are cylindrical surfaces.

[0041] In some embodiments, the solid self-lubricating material may include molybdenum disulfide (MoS 2 ).

[0042] In some embodiments, the solid self-lubricating material may also include one or more of hexagonal boron nitride, graphite, or polytetrafluoroethylene.

[0043] For example, the solid self-lubricating material may include MoS 2 , hexagonal boron nitride, graphite and polytetrafluoroethylene. In this way, the stability, temperature resistance, plasticity, toughness and anti-water absorption properties of the solid self-lubricating material can be improved.

[0044] The sliding contact surface of the spherical bearing is the contact surface between the outer spherical surface of the first outer ring 113 and the inner spherical surface of the second outer ring 120. The solid self-lubricating material is embedded in the through hole 111 of the bearing inner ring 112, and the solid self-lubricating material is arranged between the outer surface of the first outer ring 113 and the inner surface of the second outer ring 120. For example, the outer surface of the first outer ring 113 is provided with a through hole or a blind hole, and the solid self-lubricating material is arranged in the through hole or the blind hole. During the process of the bearing inner ring 112 being installed on the first outer ring 113, and during the relative movement of the first outer ring 113 and the second outer ring 120, a stable protective film can be formed on the sliding contact surface, thereby reducing the relative sliding friction coefficient and reducing the wear of the bearing inner ring 112 and the first outer ring 113 and the first outer ring and the second outer ring 120 during the relative sliding process.

[0045] Solid self-lubricating material is embedded in the through hole 111 of the bearing inner ring 112. Compared with the traditional lubrication method of setting a lubricating pad on the outer surface of the bearing inner ring 112, it can further simplify the structure of the spherical bearing, facilitate the installation and maintenance of the spherical bearing, and reduce the maintenance cost of the spherical bearing.

[0046] The solid self-lubricating material may be disposed between the outer surface of the first outer ring 113 and the inner surface of the second outer ring 120 , or the solid self-lubricating material may be plated on the outer surface of the first outer ring 113 by using a plating method.

[0047] Exemplarily, the inclination angle α at which the outer spherical surface of the first outer ring 113 and the inner spherical surface of the second outer ring 120 slide relative to each other may be in the range of 0° to 90°. Furthermore, the maximum value of the inclination angle α may be in the range of 5° to 70°.

[0048] In some embodiments, the through holes 111 may be disposed along the radial direction of the cylindrical surface of the bearing inner ring 112 .

[0049] Exemplarily, the through hole 111 may be a circular hole. Alternatively, the through hole 111 may be a square hole.

[0050] Of course, the through hole 111 may also be in other shapes, and the embodiment of the present application does not limit the shape of the through hole 111.

[0051] Optionally, the sum of the areas of the through holes 111 is greater than or equal to 20% of the inner surface area of ​​the bearing inner ring 112 .

[0052] Optionally, in the embodiment of the present application, a blind hole may be used to replace the through hole 111. That is, at least one blind hole may be provided on the outer surface of the bearing inner ring 112, and a solid self-lubricating material may be embedded in the blind hole.

[0053] The blind hole may be a circular hole, a square hole, or a hole of other irregular shapes. The present application does not limit the shape of the blind hole.

[0054] The outer contour of the spherical bearing along the circumference of the spherical bearing is a semicircular arc. That is, in this embodiment, the projection of the spherical bearing on a plane perpendicular to its axial direction can be a semicircular ring or an irregular semicircular ring (such as having chamfers at both ends of the semicircular ring).

[0055] By designing spherical bearings, especially large spherical bearings such as spherical bearings with an inner diameter greater than 200.0 mm, as semicircular rings, the weight of the spherical bearings can be greatly reduced while ensuring the functions of the spherical bearings, such as the self-aligning function, making it easier to carry and install the spherical bearings, and also reducing the cost of the spherical bearings.

[0056] In this embodiment, the inner surface of the bearing inner ring 112, the outer surface of the bearing inner ring 112, the inner surface of the first outer ring 113 and the outer surface of the second outer ring 120 can be cylindrical surfaces, and the outer surface of the first outer ring 113 and the inner surface of the second outer ring 120 are spherical surfaces.

[0057] For example, Figure 1 As shown, along the circumference of the spherical bearing, the spherical bearing forms a semicircular ring, and the inner surface of the bearing inner ring 112, the outer surface of the bearing inner ring 112, the inner surface of the first outer ring 113 and the outer surface of the second outer ring 120 are nearly half of a cylindrical curved surface.

[0058] The middle parts of both ends of the spherical plain bearing along the circumferential direction are respectively provided with openings 130. That is, in this embodiment, the bearing inner ring 112, the first outer ring 113 and the second outer ring 120 may all be provided with openings 130.

[0059] The opening 130 can be used to nest the bearing seat. For example, the bearing seat can be provided with a protrusion that matches the size of the opening 130, and the spherical bearing and the bearing seat are combined together through the protrusion to achieve the fixation of the spherical bearing and the bearing seat, thereby facilitating the installation of the spherical bearing-bearing seat assembly on the mechanical equipment.

[0060] In some embodiments, the bearing inner ring 112 is a single-layer structure. The material of the single-layer bearing inner ring 112 may include copper alloy.

[0061] Exemplarily, the material of the bearing inner ring 112 may include a ZQAl9-4 copper alloy.

[0062] For example, the material of the bearing inner ring 112 may include ZQAl9-4 copper alloy, and the contents of manganese and iron are increased on the basis of ZQAl9-4 copper alloy, so that the strength, toughness, impact resistance and wear resistance of the bearing inner ring 112 can be improved.

[0063] For example, the material of the bearing inner ring 112 may include other metal or non-metal materials, such as high-strength organic materials.

[0064] In some embodiments, the bearing inner ring 112 and the first outer ring 113 are both provided with through holes 111, and the through holes 111 can penetrate from the inner surface of the bearing inner ring 112 to the outer surface of the first outer ring 113. For example, the bearing inner ring 112 is provided with a through hole, and the first outer ring 113 is also provided with a through hole. The positions of the through holes on the bearing inner ring 112 and the first outer ring 113 are correspondingly arranged, so that the through holes can penetrate from the inner surface of the bearing inner ring 112 to the outer surface of the first outer ring 113, and extend along the contact spherical surface between the first outer ring 113 and the second outer ring 120.

[0065] The material of the first outer ring 113 includes stainless steel.

[0066] Exemplarily, the material of the first outer ring 113 may include carbon-free austenitic stainless steel.

[0067] For example, the material of the first outer ring 113 may include a wear-resistant and corrosion-resistant coating material in addition to austenitic stainless steel. Carbon-free austenitic stainless steel may be used as the base material of the first outer ring 113, and then a wear-resistant and corrosion-resistant coating such as a cobalt-nickel alloy coating may be added to the outer layer of the base material of the first outer ring 113. In this way, a corrosion-resistant, wear-resistant and high-temperature resistant metal-based composite second outer ring 120 may be obtained, which may be suitable for working conditions with higher requirements for corrosion-resistant, wear-resistant and high-temperature resistance.

[0068] In some embodiments, the material of the second outer ring 120 may include stainless steel.

[0069] The content of the material of the second outer ring 120 can refer to the relevant description of the material of the first outer ring 113 mentioned above, and this application will not elaborate on it here.

[0070] In the embodiment of the present application, the material of the second outer ring 120 and the first outer ring 113 may be the same or different, and the present application does not limit this.

[0071] In some embodiments, for example, Figure 3 As shown, the spherical bearing may further include a third outer ring 140, which is arranged outside the second outer ring 120, the contact surface between the inner surface of the third outer ring 140 and the outer surface of the second outer ring 120 is a cylindrical surface, and the outer surface of the third outer ring 140 is a spherical surface.

[0072] The spherical surface of the outer surface of the third outer ring 140 can be used to contact the bearing seat to achieve relative sliding between the spherical bearing as a whole and the bearing seat.

[0073] Exemplarily, the outer surface of the third outer ring 140 may be provided with a solid self-lubricating material. For example, the outer surface of the third outer ring 140 is provided with a through hole or a blind hole, and the solid self-lubricating material is provided in the through hole or the blind hole.

[0074] In some embodiments, the material of the third outer ring 140 may include stainless steel.

[0075] The content of the material of the third outer ring 140 can refer to the relevant description of the material of the first outer ring 113 mentioned above, and this application will not elaborate on it here.

[0076] In the embodiment of the present application, the material of the third outer ring 140 and the first outer ring 113 may be the same or different, and the present application does not limit this. Figure 2 and Figures 4 to 7 The spherical bearing provided in the embodiment of the present application is further introduced. Among them, Figure 2 for Figure 1 A partial enlarged view of one end of the spherical plain bearing along its circumference. Figure 4 for Figure 3A partial enlarged view of one end of a spherical plain bearing along its circumferential direction. Figure 5 for Figure 3 Cross-sectional view of the B-B' surface of the spherical plain bearing. Figure 6 , Figure 7 , Figure 8 and Fig. 9 They are Figure 3 Cross-sectional views of the AA′ plane and the BB′ plane of the bearing inner ring 112 , the first outer ring 113 , the second outer ring 120 , and the third outer ring 140 of the central spherical bearing.

[0077] In some embodiments, the first outer ring 113 includes a first main body 1131 and a first protrusion 1132, wherein the first protrusion 1132 is disposed at both ends of the first main body 1131 along the axial direction of the spherical bearing and protrudes from the inner surface of the first main body 1131, so that when the bearing inner ring 112 is installed, the bearing inner ring 112 is pushed and installed along the circumferential direction to the inner surface of the first outer ring 113. Both ends of the bearing inner ring 112 along the axial direction of the spherical bearing are at least partially in contact with the first protrusion 1132, so that the first protrusion 1132 limits the movement of the bearing inner ring 112 in the axial direction of the spherical bearing.

[0078] Exemplarily, the inner surface of the first protrusion 1132 may be recessed from the inner surface of the bearing inner ring 112. For example, the diameter φ5 of the cylindrical curved surface of the inner surface of the first protrusion 1132 is greater than the diameter φ1 of the cylindrical curved surface of the inner surface of the bearing inner ring 112 and less than the diameter φ2 of the cylindrical curved surface of the outer surface of the bearing inner ring 112. Alternatively, the inner surface of the first protrusion 1132 may be flush with the inner surface of the bearing inner ring 112, for example, the diameter φ5 of the cylindrical curved surface of the inner surface of the second protrusion 1132 is the same as the diameter size φ1 of the cylindrical curved surface of the inner surface of the bearing inner ring 112.

[0079] The first body 1131 and the first protrusion 1132 may be an integrated structure, or may be combined together in the form of a mechanical connection.

[0080] In some embodiments, Figures 2 to 4 ,and Figure 6 As shown, at one end of the axial direction of the spherical bearing, the first protrusion 1132 can be continuously arranged and protruded from the inner surface of the first body 1131. Alternatively, the first protrusion 1132 can also include a plurality of sub-first protrusions, which are arranged at intervals and protruded from the inner surface of the first body 1131.

[0081] It should be understood that in the embodiments of the present application, the inner surface refers to the surface facing the axis of the spherical bearing, and the outer surface refers to the surface away from the axis of the spherical bearing or the surface opposite to the inner surface. The axis of the spherical bearing is the straight line where the central axis of the circumference of the spherical bearing is located.

[0082] For example, the inner surface of the bearing inner ring 112 is a cylindrical surface of the bearing inner ring 112 facing the axis of the spherical bearing, and the outer surface of the bearing inner ring 112 is a cylindrical surface of the bearing inner ring 112 away from the axis of the spherical bearing or a surface opposite to the inner surface of the bearing inner ring 112.

[0083] In some embodiments, along the axial direction of the spherical plain bearing, the distance between the first protrusions 1132 disposed at both ends of the spherical plain bearing may be equal to the width B of the bearing inner ring 112 .

[0084] For example, Figures 1 to 4 As shown, the distance between the first protrusions 1132 at both ends along the axial direction of the spherical plain bearing, i.e., the width of the first protrusion 1132, is equal to the width B of the bearing inner ring 112. That is, along the axial direction of the spherical plain bearing, the width of the first body 1131 is the sum of the size of the first protrusions 1132 at both ends and the width B of the bearing inner ring 112.

[0085] In some embodiments, along the axial direction of the spherical plain bearing, the width C2 of the second outer ring 120 may be smaller than the width B of the bearing inner ring 112 and smaller than the width of the first body 1131 of the first outer ring 113 .

[0086] In some embodiments, the third outer ring 140 may include a second main body 141 and a second protrusion 142, the second protrusion 142 is arranged at both ends of the second main body 141 along the axial direction of the joint bearing and protrudes from the inner surface of the second main body 141, and the two ends of the second outer ring 120 along the axial direction are at least partially in contact with the second protrusion 142 to limit the axial movement of the second outer ring 120 in the joint bearing.

[0087] Exemplarily, the inner surface of the second protrusion 142 is a cylindrical surface, and the diameter of the cylindrical surface of the inner surface of the second protrusion 142 is larger than the diameter of the spherical surface of the inner surface of the second outer ring 120 and smaller than the diameter of the cylindrical surface of the outer surface of the second outer ring 120 .

[0088] In this embodiment, the width of the first body 1131 may also be referred to as the width C1 of the first outer ring 113 .

[0089] Exemplarily, the width B of the bearing inner ring 112 is 50.0 mm to 250.0 mm.

[0090] Exemplarily, the width C1 of the first outer ring 113 is 60.0 mm to 260.0 mm.

[0091] Exemplarily, along one axial end of the spherical plain bearing, a width C4 of the first protrusion 1132 is 5.0 mm to 10.0 mm.

[0092] Exemplarily, the width C2 of the second outer ring 120 is 85.0 mm to 150.0 mm.

[0093] Exemplarily, the width C3 of the third outer ring 140 is 95.0 mm to 260.0 mm.

[0094] In this embodiment, from the inside to the outside of the spherical bearing, the inner surface and outer surface of the bearing inner ring 112 and the inner surface of the first outer ring 113 and the first body 1131 are all cylindrical surfaces, the outer surface of the first outer ring 113 and the first body 1131 and the inner surface of the second outer ring 120 are spherical surfaces, and the outer surface of the second outer ring 120 is a cylindrical surface.

[0095] The outer surface of the bearing inner ring 112 contacts the inner surface of the first main body 1131 of the first outer ring 113, and the outer surface of the first main body 1131 of the first outer ring 113 contacts the inner surface of the second outer ring 120. Therefore, it can be considered that the outer surface of the bearing inner ring 112 and the inner surface of the first main body 1131 of the first outer ring 113 have the same cylindrical curved surface diameter, and the outer surface of the first main body 1131 of the first outer ring 113 and the inner surface of the second outer ring 120 have the same spherical diameter.

[0096] Exemplarily, the cylindrical curved surface diameter φ1 of the inner surface of the bearing inner ring 112 is 150.0 mm-600.0 mm.

[0097] Exemplarily, the thickness of the bearing inner ring 112 is 10.0 mm-30.0 mm.

[0098] Exemplarily, the cylindrical curved surface diameter φ2 of the outer surface of the bearing inner ring 112 is 160.0 mm to 630.0 mm.

[0099] Exemplarily, the diameter φ3 of the cylindrical curved surface of the inner surface of the first body 1131 is 160.0 mm to 630.0 mm.

[0100] Exemplarily, the spherical diameter Sφ1 of the outer surface of the first body 1131 is 200.0 mm-500.0 mm.

[0101] Exemplarily, the ball diameter Sφ2 of the inner surface of the second outer ring 120 is 200.0 mm-500.0 mm.

[0102] Exemplarily, the diameter φ4 of the cylindrical curved surface of the outer surface of the second outer ring is 300.0 mm-700.0 mm.

[0103] Exemplarily, the cylindrical curved surface diameter φ5 of the inner surface of the first protrusion 1132 is 60.0 mm-150.0 mm.

[0104] For example, for a semicircular spherical bearing, the width B of the bearing inner ring 112 is 150.0 mm, the width C1 of the first main body 1131 of the first outer ring 113 is 160.0 mm, the width C4 of the first protrusion 1132 is 5 mm, the width C2 of the second outer ring 120 is 95.0 mm, and the width C3 of the third outer ring 140 is 105 mm.

[0105] The cylindrical curved surface diameter φ1 of the inner surface of the bearing inner ring 112 is 300 mm, the cylindrical curved surface diameter φ2 of the outer surface of the bearing inner ring 112 and the cylindrical curved surface diameter φ3 of the inner surface of the first body 1131 are 320.0 mm, the spherical diameter Sφ1 of the outer surface of the first body 1131 and the spherical diameter Sφ2 of the inner surface of the second outer ring 120 are 390.0 mm, and the cylindrical curved surface diameter φ4 of the outer surface of the second outer ring is 420.0 mm. Among them, the cylindrical curved surface diameter φ4 of the inner surface of the first protrusion 1132 is 305 mm.

[0106] In some embodiments, in the middle of both ends of the semicircular spherical plain bearing, the diameter R1 of the opening 130 is 70.0 mm to 155.0 mm.

[0107] For example, the diameter R1 of the semicircular opening 130 is 90 mm.

[0108] In some embodiments, the number of the through holes 111 on the semicircular spherical plain bearing is 35 to 55.

[0109] In some embodiments, on the semicircular spherical plain bearing, the diameter of the through hole 111 is 10.0 mm to 20.0 mm.

[0110] In some embodiments, in a semicircular spherical plain bearing, the area of ​​the through hole 111 accounts for more than 20% of the inner surface area of ​​the bearing inner ring 112 .

[0111] For example, on a semicircular spherical bearing, the number of through holes 111 may be 50, and the diameter of the through holes 111 may be 16 mm. The through holes 111 may be arranged in a row of 5 and a row of 4 along the axial direction of the spherical bearing. The area of ​​the through holes 111 accounts for 25% of the inner surface area of ​​the bearing inner ring 112.

[0112] In the embodiment of the present application, the sizes of the various parts of the spherical bearing that are in contact with each other are equal, and there should be a certain amount of assembly tolerance, etc., to facilitate the assembly of the spherical bearing. For example, the outer surface of the bearing inner ring 112 and the cylindrical curved surface diameter size of the inner surface of the first body 1131 of the first outer ring 113 are equal, and there is a certain amount of assembly tolerance between the two, so that the bearing inner ring 112 is assembled to the inner side of the first outer ring 113.

[0113] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A semi-open solid self-lubricating spherical bearing, characterized in that: include: A bearing inner ring (112), wherein the bearing inner ring (112) is provided with at least one through hole (111) penetrating the inner and outer surfaces of the bearing inner ring (112), and a solid self-lubricating material is embedded in the through hole (111); A first outer ring (113), the first outer ring (113) being arranged outside the bearing inner ring (112), and a contact surface between an inner surface of the first outer ring (113) and an outer surface of the bearing inner ring (112) being a cylindrical curved surface; a second outer ring (120), wherein the second outer ring (120) is arranged outside the first outer ring (113), and a contact surface between an outer surface of the first outer ring (113) and an inner surface of the second outer ring (120) is a spherical surface; and a solid self-lubricating material is arranged between the outer surface of the first outer ring (113) and the inner surface of the second outer ring (120); The bearing inner ring (112), the first outer ring (113) and the second outer ring (120) are respectively provided with openings (130) at both ends of the circumference of the spherical bearing. The openings (130) are used to fix the spherical bearing on the bearing seat through a pressing block. The projection of the openings (130) on the target plane is semicircular. The target plane is parallel to the cross-sections of the inner surface of the bearing inner ring (112) at both ends of the circumference or the cross-sections of the outer surface of the second outer ring (120) at both ends of the circumference. The inner surface of the bearing inner ring (112) and the outer surface of the second outer ring (120) are cylindrical surfaces.

2. The spherical plain bearing according to claim 1, characterized in that: A solid self-lubricating material is provided between the outer surface of the first outer ring (113) and the inner surface of the second outer ring (120), comprising: The outer surface of the first outer ring (113) is provided with a through hole or a blind hole, and the solid self-lubricating material is arranged in the through hole or the blind hole.

3. The spherical plain bearing according to claim 1, characterized in that: The spherical bearing also includes: A third outer ring (140), wherein the third outer ring (140) is arranged on the outer side of the second outer ring (120), the contact surface between the inner surface of the third outer ring (140) and the outer surface of the second outer ring (120) is a cylindrical surface, the outer surface of the third outer ring (140) is a spherical surface, the outer surface of the third outer ring (140) is provided with a through hole or a blind hole, and a solid self-lubricating material is provided in the through hole or the blind hole.

4. The spherical plain bearing according to any one of claims 1 to 3, characterized in that: The through holes (111) are arranged along the radial direction of the spherical surface, and the sum of the areas of the through holes (111) is greater than or equal to 20% of the inner surface area of ​​the bearing inner ring (112).

5. The spherical plain bearing according to any one of claims 1 to 3, characterized in that: The first outer ring (113) includes a first main body (1131) and a first protrusion (1132), wherein the first protrusion (1132) is arranged at both ends of the first main body (1131) along the axial direction of the spherical bearing and protrudes from the inner surface of the first main body (1131), so that when the bearing inner ring (112) is installed, the bearing inner ring (112) is pushed and installed to the inner surface of the first outer ring (113) along the circumferential direction, and the two ends of the bearing inner ring (112) along the axial direction are at least partially in contact with the first protrusion (1132), so that the first protrusion (1132) limits the axial movement of the bearing inner ring (112) in the spherical bearing.

6. The spherical plain bearing according to any one of claims 1 to 3, characterized in that: The width B of the bearing inner ring (112) is 50.0 mm to 250.0 mm.

7. The spherical plain bearing according to claim 5, characterized in that: The width C1 of the first outer ring (113) is 60.0 mm to 260.0 mm, and the width C4 of the first protruding portion (1132) is 5.0 mm to 10.0 mm.

8. The spherical plain bearing according to any one of claims 1 to 3, characterized in that: The width C2 of the second outer ring (120) is 85.0 mm to 150.0 mm.

9. The spherical plain bearing according to claim 3, characterized in that: The width C3 of the third outer ring (140) is 95.0 mm to 260.0 mm.

10. The spherical plain bearing according to any one of claims 1 to 3, characterized in that: The diameter of the cylindrical curved surface of the inner surface of the bearing inner ring (112) is 150.0 mm-600.0 mm, and the thickness of the bearing inner ring (112) is 10.0 mm-30.0 mm.

11. The spherical plain bearing according to claim 8, characterized in that: The spherical diameter of the outer surface of the first outer ring (113) and the spherical diameter of the inner surface of the second outer ring (120) are both 200.0 mm-500.0 mm.

12. The spherical plain bearing according to any one of claims 1 to 3, characterized in that: The diameter of the cylindrical curved surface of the outer surface of the second outer ring (120) is 300.0 mm-700.0 mm.

13. The spherical plain bearing according to any one of claims 1 to 3, characterized in that: The semicircular diameter of the opening (130) is 60.0 mm-150.0 mm.

14. The spherical plain bearing according to claim 1, characterized in that: The maximum value of the inclination angle α generated by the sliding of the first outer ring (113) relative to the second outer ring (120) is in the range of 5° to 70°.

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