Novel radial spherical plain bearing

Abstract

The utility model discloses a novel radial spherical plain bearing which comprises a graphite inner ring, a graphite sleeve tile, an outer ring structure, a retaining ring and a locking sleeve piece, the graphite inner ring is provided with an outer spherical surface, and the graphite sleeve tile is provided with an inner spherical surface; the graphite inner ring is arranged in the graphite sleeve tile; the outer spherical surface of the graphite inner ring is matched with the inner spherical surface of the graphite sleeve tile; the outer ring structure comprises a bottom plate and an outer ring; the lower end of the outer ring is fixed on the bottom plate, and the outer ring and the bottom plate are coaxially arranged; the graphite sleeve tile is arranged on the bottom plate on the inner side of the outer ring; the outer peripheral surface of the graphite sleeve tile is in contact with the inner peripheral surface of the outer ring; the retaining ring is arranged on the upper end surface of the graphite sleeve tile; and the outer side of the outer ring is detachably connected with the locking sleeve piece. The graphite bearing has the advantages that the graphite inner ring and the graphite sleeve tile are designed, a self-lubricating graphite film is formed in the fit clearance of the graphite inner ring and the graphite sleeve tile, lubricating oil does not need to be filled or a solid lubricating coating does not need to be plated, and the service life is long.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a novel radial spherical bearing. Background Art

[0002] The radial spherical plain bearing is a kind of sliding bearing, which is mainly used to bear radial load. This kind of bearing can rotate and swing at any angle, and has the characteristics of simple structure, strong bearing capacity, impact resistance, wear resistance, self-aligning, etc. Moreover, since the sliding surface is spherical, it can also make tilting movement within a certain angle range, that is, self-aligning movement. It can still work normally when the supporting shaft and the shaft shell hole are not concentric. In addition, the coated self-lubricating radial spherical plain bearing is based on the traditional radial spherical plain bearing. It uses advanced surface engineering technology to plate a solid lubricating coating on the spherical outer surface and (or) spherical inner surface that are in contact with each other, and is a self-lubricating bearing as a lubricating medium.

[0003] At present, the existing radial spherical plain bearing has a simple structure, mainly consisting of an inner ring with an outer spherical surface and an outer ring with an inner spherical surface, and the inner and outer contact surfaces are plated with a solid lubricating coating. However, the coating will peel off during use, which will lead to the failure of the bearing due to adhesive wear, thus affecting the service life of the bearing. In addition, the existing radial spherical plain bearing forms a fit between the inner and outer rings through metal extrusion deformation, which is not suitable for metallurgy, optical fiber, semiconductor and various chemical corrosion and high temperature occasions.

[0004] Therefore, it is necessary to improve the prior art. Summary of the invention

[0005] The utility model aims to provide a novel radial spherical bearing to improve the service life in view of the deficiencies in the prior art.

[0006] The technical solution adopted by the utility model is: a new type of radial spherical bearing, including a graphite inner ring, a graphite bushing, an outer ring structure, a retaining ring and a locking kit;

[0007] The graphite inner ring is provided with an outer spherical surface, and the graphite bushing is provided with an inner spherical surface;

[0008] The graphite inner ring is arranged inside the graphite bushing;

[0009] The outer spherical surface of the graphite inner ring is adapted to the inner spherical surface of the graphite bushing;

[0010] The outer ring structure includes a bottom plate and an outer ring; the lower end of the outer ring is fixed on the bottom plate, and the two are coaxially arranged; the graphite bushing is arranged on the bottom plate inside the outer ring, and the outer peripheral surface of the graphite bushing contacts the inner peripheral surface of the outer ring; the retaining ring is arranged on the upper end surface of the graphite bushing;

[0011] The outer side of the outer ring is detachably connected to the locking kit, and the locking kit is pressed tightly against the retaining ring;

[0012] The graphite inner ring, the graphite bushing and the outer ring are coaxially arranged.

[0013] According to the above scheme, a sliding gap is maintained between the graphite inner ring and the graphite bushing, and the graphite bushing is pressed tightly against the outer ring.

[0014] According to the above solution, a sink groove is provided on the upper end surface of the graphite bushing, and the retaining ring is arranged in the sink groove.

[0015] According to the above solution, the outer peripheral surface of the retaining ring is an inclined surface that is radially inclined inward, and the inner groove surface of the sink groove is an inclined surface that is matched with the outer peripheral surface of the retaining ring.

[0016] According to the above solution, the graphite bushing includes at least two bushing units, and the bushing units are spliced ​​in sequence to form the graphite bushing.

[0017] According to the above scheme, the locking kit includes a locking sleeve and a clamping plate; the locking sleeve is connected to the outer ring; the clamping plate is an annular structure, the clamping plate is arranged at the upper port of the locking sleeve, and the lower surface of the clamping plate is pressed against the upper surface of the retaining ring.

[0018] According to the above solution, the locking sleeve is threadedly connected to the outer ring.

[0019] According to the above solution, the locking kit, retaining ring and outer ring structure can all be made of graphite material.

[0020] The beneficial effects of the utility model are as follows: the utility model designs a graphite inner ring and a graphite bushing, and the graphite inner ring and the graphite bushing cooperate with each other to form a self-lubricating graphite film to realize the bearing function. Compared with the prior art, there is no need to fill lubricating oil or plate a solid lubricating coating, and no adhesive wear will occur, and the service life is long. The utility model has the characteristics of high temperature resistance and stable chemical properties, and has a wide range of applications; it is not easy to crack when subjected to impact or drastic temperature changes. The utility model designs an outer ring structure and a locking kit for fixing, and the outer ring structure and the locking kit are detachably connected, which is convenient for replacing the internal bushing and inner ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a specific embodiment of the utility model.

[0022] Figure 2 Schematic diagram of the disassembly of this embodiment.

[0023] Among them: 1. Graphite inner ring; 2. Graphite bushing; 2.1. Sink; 3. Outer ring; 4. Retaining ring; 5. Locking sleeve; 6. Pressing plate; 7. Bottom plate. DETAILED DESCRIPTION

[0024] In order to better understand the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] like Figure 1 and Figure 2 A novel radial spherical plain bearing shown includes a graphite inner ring 1, a graphite bushing 2, an outer ring structure, a retaining ring 4 and a locking kit;

[0026] The graphite inner ring 1 is provided with an outer spherical surface, and the graphite bushing 2 is provided with an inner spherical surface;

[0027] The graphite inner ring 1 is arranged inside the graphite bushing 2;

[0028] The outer spherical surface of the graphite inner ring 1 is adapted to the inner spherical surface of the graphite bushing 2;

[0029] The outer ring structure includes a bottom plate 7 and an outer ring 3; the lower end of the outer ring 3 is fixed on the bottom plate 7, and the two are coaxially arranged; the graphite bushing 2 is arranged on the bottom plate 7 inside the outer ring 3, and the outer peripheral surface of the graphite bushing 2 is in contact with the inner peripheral surface of the outer ring 3; the retaining ring 4 is arranged on the upper end surface of the graphite bushing 2;

[0030] The outer side of the outer ring 3 is detachably connected to the locking kit, and the locking kit is pressed tightly against the retaining ring 4;

[0031] The graphite inner ring 1, the graphite bushing 2 and the outer ring 3 are coaxially arranged.

[0032] In the utility model, a sliding gap is maintained between the graphite inner ring 1 and the graphite bushing 2, and the graphite bushing 2 and the outer ring 3 are pressed tightly.

[0033] In the present invention, the bottom plate 7 and the outer ring 3 are an integral structure.

[0034] Preferably, a recessed groove 2.1 is formed on the upper end surface of the graphite bushing 2, and the retaining ring 4 is arranged in the recessed groove 2.1. The locking assembly presses the retaining ring 4.

[0035] Preferably, the outer peripheral surface of the retaining ring 4 is a sloped surface that is radially inclined inward, and correspondingly, the inner groove surface of the sink 2.1 is an inclined surface that matches the outer peripheral surface of the retaining ring 4. In the present invention, the design of the inclined surface is conducive to the assembly and compression of the retaining ring 4.

[0036] In the present invention, the graphite bushing 2 is a segmented structure, including at least two bushing units, and each bushing unit is sequentially spliced ​​to form the graphite bushing 2.

[0037] Preferably, the locking kit includes a locking sleeve 5 and a pressing plate 6; the locking sleeve 5 is connected to the outer ring 3; the pressing plate 6 is an annular structure, the pressing plate 6 is arranged at the upper port of the locking sleeve 5, and the lower surface of the pressing plate 6 is pressed against the upper surface of the retaining ring 4.

[0038] In the present invention, the locking sleeve 5 is threadedly connected to the outer ring 3, and the lower end of the locking sleeve 5 can contact the bottom plate 7 of the outer ring structure. Specifically, the locking sleeve 5 is provided with an internal thread, and the outer ring 3 is provided with an external thread adapted to the internal thread.

[0039] In the present invention, the locking sleeve 5 and the pressing plate 6 are an integrated structure.

[0040] In the utility model, the locking kit, the retaining ring 4 and the outer ring structure can all be made of graphite material.

[0041] The graphite inner ring 1 is assembled in the graphite bushing 2, so that the graphite bushing 2 and the graphite inner ring 1 maintain a sliding gap, and then the two are installed as a whole on the bottom plate 7 of the outer ring structure, so that the graphite bushing 2 and the outer ring 3 are pressed tightly; the retaining ring 4 is assembled in the sink 2.1 on the top of the graphite bushing 2; finally, the locking kit is threadedly connected to the outer ring 3 of the outer ring structure, and the clamping plate 6 of the locking kit is pressed to the retaining ring 4. The workpiece is connected to the graphite inner ring 1, and the rotation between the graphite inner ring 1 and the graphite bushing 2 allows the workpiece to swing freely and slowly within a certain angle.

[0042] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0043] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of radial spherical plain bearing, characterized in that: Includes graphite inner ring, graphite bushing, outer ring structure, retaining ring and locking kit; The graphite inner ring is provided with an outer spherical surface, and the graphite bushing is provided with an inner spherical surface; The graphite inner ring is arranged inside the graphite bushing; The outer spherical surface of the graphite inner ring is adapted to the inner spherical surface of the graphite bushing; The outer ring structure includes a bottom plate and an outer ring; the lower end of the outer ring is fixed on the bottom plate, and the two are coaxially arranged; the graphite bushing is arranged on the bottom plate inside the outer ring, and the outer peripheral surface of the graphite bushing contacts the inner peripheral surface of the outer ring; the retaining ring is arranged on the upper end surface of the graphite bushing; The outer side of the outer ring is detachably connected to the locking kit, and the locking kit is pressed tightly against the retaining ring; The graphite inner ring, the graphite bushing and the outer ring are coaxially arranged.

2. The new radial spherical plain bearing according to claim 1 is characterized in that: A sliding gap is maintained between the graphite inner ring and the graphite bushing, and the graphite bushing is pressed tightly against the outer ring.

3. The new radial spherical plain bearing according to claim 1 is characterized in that: The upper end surface of the graphite bushing is provided with a sinking groove, and the retaining ring is arranged in the sinking groove.

4. The new radial spherical plain bearing according to claim 3 is characterized in that: The outer peripheral surface of the retaining ring is an inclined surface that is radially inclined inward, and the inner groove surface of the sink groove is an inclined surface that is adapted to the outer peripheral surface of the retaining ring.

5. The new radial spherical plain bearing according to claim 3 is characterized in that: The graphite bushing comprises at least two bushing units, and the bushing units are spliced ​​in sequence to form a graphite bushing.

6. The new radial spherical plain bearing according to claim 3 is characterized in that: The locking kit includes a locking sleeve and a clamping plate; the locking sleeve is connected to the outer ring; the clamping plate is an annular structure, the clamping plate is arranged at the upper end of the locking sleeve, and the lower surface of the clamping plate is pressed against the upper surface of the retaining ring.

7. The new radial spherical plain bearing according to claim 6 is characterized in that: The locking sleeve is threadedly connected to the outer ring.

8. The new radial spherical plain bearing according to claim 1 is characterized in that: The locking kit, retaining ring and outer ring structure can all be made of graphite material.

Images