Bearing structure, motor assembly and holder

Abstract

The utility model belongs to the technical field of bearings, and particularly relates to a bearing structure, a motor assembly and a holder. The bearing comprises an outer ring, an inner ring and a plurality of rolling pieces, and at least two circles of first connecting parts used for fastening connection are formed on the outer ring; the inner ring is rotationally connected to the inner side of the outer ring around the axis of the outer ring, and a second connecting part for fastening connection is formed on the inner side of the inner ring; the rolling pieces are in rolling connection between the inner side face of the outer ring and the outer side face of the inner ring. The bearing is used for solving the problem that a conventional bearing is difficult to assemble. The outer ring and the inner ring are fixedly connected with the outside through the first connecting part and the second connecting part respectively, the mode that the outer ring and the inner ring are fixedly connected with the outside through a fastener is changed, only bolt connection is needed, and meanwhile the connection stability is better than that of press-fitting connection.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings, and in particular relates to a bearing structure, a motor component and a pan / tilt platform. Background Art

[0002] Bearings are one of the key components in mechanical equipment. Their performance and quality directly affect the operating efficiency and reliability of the equipment. With the continuous development of industrial technology, the requirements for bearings are getting higher and higher.

[0003] At present, bearings are usually installed on shafts by heat installation, cold installation or press installation. These installation methods are usually difficult to operate. Usually, the inner ring of the bearing and the shaft are interference fit, and the interference fit needs to be reasonably selected based on the interference between the motor shaft and the inner ring of the bearing, and between the motor housing and the outer ring of the bearing. The interference fit needs to be reasonably selected based on factors such as the power, speed, and load of the motor. Inappropriate interference fit may cause the bearing to loosen during rotation, affecting the motor performance, or may cause installation difficulties or damage the bearing. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a bearing structure, a motor assembly and a pan / tilt platform, which are used to solve the problem of difficulty in assembling conventional bearings.

[0005] In the first aspect, the technical solution of the utility model to solve the above technical problems is as follows: a bearing structure, comprising:

[0006] An outer ring, on which at least two circles of first connecting parts for fastening connection are formed;

[0007] An inner ring, the inner ring is rotatably connected to the inner side of the outer ring around the axis of the outer ring, and a second connecting portion for fastening is formed on the inner side of the inner ring;

[0008] A plurality of rolling elements are rollingly connected between the inner side surface of the outer ring and the outer side surface of the inner ring.

[0009] Compared with the prior art, the above technical solution has the following beneficial effects:

[0010] The outer ring and the inner ring are fastened to the outside through the first connecting part and the second connecting part respectively, so that the installation method of the bearing is changed from the more complicated press-fitting method in the past to the method of connecting and fixing with fasteners, which only needs to be connected by bolts. At the same time, the stability of the connection is better than that of the press-fitting connection.

[0011] Based on the above technical solution, the embodiment of the present application can also be improved as follows:

[0012] In one embodiment, the first connection portion is provided on an end surface of the outer ring that is different from the inner side surface thereof, and a plurality of first mounting holes are provided on the first connection portion at intervals along the circumferential direction.

[0013] In one embodiment, the first connection portion is provided on the outer side surface of the outer ring, and a plurality of second mounting holes are provided on the first connection portion at intervals along the circumferential direction.

[0014] In one embodiment, the second connection portion is disposed on the inner side of the inner ring, the second connection portion and the inner ring form a stepped structure, and a plurality of third mounting holes are opened on the second connection portion along the circumferential direction.

[0015] In one embodiment, a convex stop for limiting is provided on the outer side of the first connection portion where the second mounting hole is formed.

[0016] In a second aspect, the utility model further discloses a motor assembly, which comprises: the bearing structure as described above;

[0017] A rotating shaft, firmly connected to the second connecting portion of the inner ring;

[0018] The motor comprises a motor stator which is tightly connected to the first connecting portion of the outer ring, and a motor rotor which is tightly connected to the rotating shaft.

[0019] In one embodiment, the motor assembly includes a fixing plate, and the fixing plate is fastened to the first connecting portion of the outer ring via a stud.

[0020] In one embodiment, the motor assembly further includes an encoder, and the encoder includes an encoder rotor and an encoder stator that are matched with each other, the encoder stator is fastened to the fixing plate, and the encoder rotor is fastened to the rotating shaft.

[0021] In a third aspect, the utility model further discloses a pan head, which comprises: a housing;

[0022] As the motor assembly mentioned above, the motor assembly is disposed in the housing to provide an axial rotational power.

[0023] In one embodiment, the gimbal further comprises a U-shaped frame, the middle portion of the U-shaped frame is connected to the output shaft of the motor assembly in the housing, and the two distal ends of the U-shaped frame are respectively mounted with relatively arranged motor assemblies as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the utility model.

[0026] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure.

[0027] Figure 3 This is a schematic cross-sectional view of Example 2 of the utility model.

[0028] Figure 4 This is a schematic cross-sectional view of Example 3 of the utility model.

[0029] Figure 5 for Figure 4 Schematic diagram of the overall structure.

[0030] Reference numerals:

[0031] 1. Outer ring; 2. First connecting portion; 3. First mounting hole; 4. Second mounting hole;

[0032] 5. Inner ring; 6. Second connecting portion; 7. Third mounting hole; 8. Convex stopper;

[0033] 9. Rotating shaft; 10. Motor stator; 11. Motor rotor; 12. Fixing plate; 13. Encoder stator; 14. Encoder rotor;

[0034] 15. Shell; 16. U-shaped frame. DETAILED DESCRIPTION

[0035] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0036] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0037] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 should not be understood as a limitation on the present invention.

[0038] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically limited.

[0039] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0040] Example 1

[0041] like Figure 1-2 As shown, the utility model provides a bearing structure, which includes: an outer ring 1, an inner ring 5 and a plurality of rolling elements.

[0042] At least two circles of first connecting parts 2 for fastening connection are formed on the outer ring 1, that is, the first connecting part 2 is located on two circles of different radii on the outer ring 1, the inner ring 5 is connected to the inner side of the outer ring 1 by rotation around the axis of the outer ring 1, the axis of the inner ring 5 and the outer ring 1 are located on the same straight line, that is, the axis line of the inner ring 5 and the outer ring 1 is consistent, and a second connecting part 6 for fastening connection is formed on the inner side of the inner ring 5, and a number of rolling elements are rollingly connected between the inner side surface of the outer ring 1 and the outer side surface of the inner ring 5. The outer side surface of the inner ring 5 or the inner side surface of the outer ring 1 may be provided with a limiting groove for accommodating the rolling elements, or the limiting groove is partially opened on the outer side surface of the inner ring 5 and the inner side surface of the outer ring 1. The rolling elements can be realized by balls, etc. In this embodiment, the rolling elements are not shown in the figure.

[0043] The outer ring 1 and the inner ring 5 are fastened to the outside through the first connecting part 2 and the second connecting part 6 respectively, so that the installation method of the bearing is changed from the more complicated press-fitting method in the past to the method of connecting and fixing with fasteners, which only needs to be connected by bolts. At the same time, the stability of the connection is better than that of the press-fitting connection.

[0044] In one embodiment, the first connection portion 2 is provided on the end face of the outer ring 1 which is different from the inner side face thereof. The first connection portion 2 may be annular or a protrusion arranged in an annular shape. When the first connection portion 2 is provided on the end face of the outer ring 1, a plurality of first mounting holes 3 are provided on the first connection portion 2 at intervals along the circumferential direction. The first mounting holes 3 may be arranged at intervals around the annular first connection portion 2, or may be correspondingly arranged on the protrusion arranged in an annular shape. The axis of the first mounting hole 3 is arranged parallel to the axial direction of the outer ring 1, and a plurality of mounting holes are arranged at intervals along the circumference of the annular first mounting portion on the end face of the annular first connection portion 2.

[0045] In another embodiment, the first connection portion 2 is provided on the outer surface of the outer ring 1. In this case, the first connection portion 2 may be a ring-shaped or ring-shaped protrusion. In this embodiment, the first connection portion 2 located on the outer side of the outer ring 1 is a ring-shaped protrusion, that is, the first connection portion 2 is provided on the outer peripheral surface of the outer ring 1, and each protrusion forms a step-like structure with the outer ring 1. A plurality of second mounting holes 4 are provided on the first connection portion 2 at intervals along the circumferential direction. The second mounting holes 4 are correspondingly arranged in the protrusions located on the outer side of the outer ring 1. The axial direction of the second mounting hole 4 is arranged parallel to the axial direction of the outer ring 1, and the second mounting hole 4 is a through hole that penetrates the second mounting portion.

[0046] In one embodiment, a first mounting portion may be provided on both the end face and the outer side face of the outer ring 1, and a plurality of first mounting holes 3 and second mounting holes 4 are respectively provided on the two mounting portions on the outer side face and the end face of the outer ring 1, so that the outer ring 1 can be fixed and fastened to different external devices.

[0047] The second connecting portion 6 is provided on the inner side of the inner ring 5. The second connecting portion 6 can be an annular structure integrally formed with the inner ring 5 or a plurality of protrusions arranged in an annular shape. In the present embodiment, the second connecting portion 6 is an annular structure. At this time, the second connecting portion 6 and the inner ring 5 form a stepped structure. A plurality of third mounting holes 7 are opened in the circumferential direction on the second connecting portion 6. The axial direction of the third mounting hole 7 is parallel to the axial centerline direction of the inner ring 5. The inner ring 5 can be fastened and fixed with other components by fasteners such as bolts passing through the third connecting holes.

[0048] A convex stop 8 for limiting is arranged on the outer side of the first connecting portion 2 with the second mounting hole 4. The convex stop 8 is located at the periphery of the second mounting hole 4 and surrounds the second mounting hole 4. The convex stop 8 can limit the components connected to the second mounting hole 4.

[0049] Example 2

[0050] like Figure 3 As shown, the utility model further discloses a motor assembly, which comprises: a bearing structure as in Example 1, a rotating shaft 9 and a motor, wherein the motor comprises a motor stator 10 and a motor rotor 11 .

[0051] The rotating shaft 9 is fastened to the second connecting portion 6 of the inner ring 5. Specifically, the rotating shaft 9 is sleeved inside the inner ring 5, and the outer periphery of the rotating shaft 9 is fastened to the second connecting portion 6 on the inner ring 5 by fasteners such as bolts. When the rotating shaft 9 rotates, it can drive the inner ring 5 to rotate through the second connecting portion 6.

[0052] The motor stator 10 in the motor is fastened to the first connecting portion 2 of the outer ring 1, and the motor rotor 11 is fastened to the rotating shaft 9. Specifically, the motor rotor 11 is fastened to the rotating shaft 9, and the motor stator 10 is fastened to the first connecting portion 2 on the outer ring 1 through long bolts; it is connected to the motor stator 10 through the outer ring 1, specifically, the motor stator 10 is fastened to the first mounting hole 3 in the first connecting portion 2 on the end face of the outer ring 1, the inner ring 5 is connected to the motor rotor 11 on the inner side, and the rotating shaft 9 is connected and fixed to the motor rotor 11 and the inner ring 5 at the same time. The bearing structure formed by the inner ring 5 and the outer ring 1 can play a role of rotational connection, and can also be fastened and fixed by bolts to ensure a tight connection.

[0053] In this embodiment, the motor assembly includes a fixing plate 12, which is fastened to the second mounting hole 4 in the first connecting portion 2 on the outside of the outer ring 1 through studs, and the first mounting hole 3 and the second mounting hole 4 on the outer ring 1 can be connected and fastened to different components respectively.

[0054] Furthermore, the motor assembly also includes an encoder, and the encoder includes an encoder rotor 14 and an encoder stator 13 that are matched with each other. The encoder stator 13 is fastened to the fixing plate 12 , and the encoder rotor 14 is fastened to the rotating shaft 9 .

[0055] Example 3

[0056] like Figure 4 , 5 As shown, the utility model also discloses a pan / tilt head, which comprises: a housing 15;

[0057] As in the motor assembly of Embodiment 2, the motor assembly is disposed in the housing 15 for providing an axial rotational power, and the output end and the rotating shaft 9 of the motor assembly extend out of the housing 15 for providing rotational power.

[0058] Furthermore, the gimbal also includes a U-shaped frame 16, the middle portion of the U-shaped frame 16 is connected to the output shaft of the motor assembly in the shell 15, that is, the U-shaped frame 16 is fixedly connected to the end of the rotating shaft 9 of the motor assembly in the shell 15, and the two distal ends of the U-shaped frame 16 are respectively installed with relatively arranged motor assemblies as described above, and the output end of the motor assembly located in the distal support arm of the U-shaped frame 16 is used to be fastened to both sides of the load to drive the load to rotate, and the motor assembly in the shell 15 can also drive the U-shaped frame 16 to rotate around another axis to achieve multi-dimensional rotation control, wherein the rotation is connected through the bearing structure in Example 1, and its beneficial effects are the same as those in Example 1 and Example 2, which will not be repeated here

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A bearing structure, characterized in that: include: An outer ring, on which at least two circles of first connecting parts for fastening connection are formed; An inner ring, the inner ring is rotatably connected to the inner side of the outer ring around the axis of the outer ring, and a second connecting portion for fastening is formed on the inner side of the inner ring; A plurality of rolling elements are rollingly connected between the inner side surface of the outer ring and the outer side surface of the inner ring.

2. The bearing structure according to claim 1, characterized in that: The first connection portion is arranged on an end surface of the outer ring which is different from the inner side surface thereof, and a plurality of first mounting holes are arranged on the first connection portion at intervals along the circumferential direction.

3. The bearing structure according to claim 1, characterized in that: The first connecting portion is arranged on the outer side surface of the outer ring, and a plurality of second mounting holes are arranged at intervals along the circumferential direction on the first connecting portion.

4. The bearing structure according to claim 1, characterized in that: The second connection portion is arranged on the inner side of the inner ring, the second connection portion and the inner ring form a stepped structure, and a plurality of third mounting holes are opened on the second connection portion along the circumferential direction.

5. The bearing structure according to claim 3, characterized in that: A convex stop for limiting is arranged on the outer side of the first connecting portion where the second mounting hole is formed.

6. A motor assembly, characterized in that: include: The bearing structure according to claim 1; A rotating shaft, firmly connected to the second connecting portion of the inner ring; The motor comprises a motor stator which is tightly connected to the first connecting portion of the outer ring, and a motor rotor which is tightly connected to the rotating shaft.

7. The motor assembly according to claim 6, characterized in that The motor assembly includes a fixing plate, and the fixing plate is fastened to the first connecting portion of the outer ring via a stud.

8. The motor assembly according to claim 7, characterized in that The motor assembly also includes an encoder, which includes an encoder rotor and an encoder stator that are matched with each other, the encoder stator is tightly connected to the fixing plate, and the encoder rotor is tightly connected to the rotating shaft.

9. A pan / tilt head, characterized in that: include: case; The motor assembly as claimed in claim 6 is arranged in the housing to provide an axial rotational power.

10. The pan / tilt head according to claim 9, characterized in that: The gimbal further comprises a U-shaped frame, the middle portion of the U-shaped frame is connected to the output shaft of the motor assembly in the housing, and the two far ends of the U-shaped frame are respectively mounted with the motor assemblies as claimed in claim 6 arranged opposite to each other.

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