Bearing assembly and shield pump

Abstract

The utility model discloses a bearing assembly and a shield pump. The utility model relates to a bearing assembly which comprises a bearing, a mounting seat and a pressing piece, the mounting base is provided with a containing cavity used for containing the bearing and the center shaft. The pressing piece is movably connected to the mounting base and provided with a first abutting face, and the first abutting face and the bottom wall of the containing cavity are oppositely arranged. When the bearing is in the first state, the bottom wall of the containing cavity and the first abutting face jointly abut against the end faces of the two sides of the bearing in the axial direction, and when the bearing is in the second state, the first abutting face is separated from the bearing, and the bearing can enter and exit from the containing cavity in the axial direction. The pressing piece is additionally arranged on the mounting seat, the mounting seat can be fixedly mounted relative to the central shaft, then the bearing is placed in the mounting seat and arranged on the central shaft in a sleeving manner, and the bearing is pressed by the pressing piece and the mounting seat together, so that the bearing is fixed in the accommodating cavity of the mounting seat, a threaded hole does not need to be formed in the bearing due to the design; the bearing life can be effectively prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing technical field, specifically designs a bearing assembly and shielded pump. BACKGROUND

[0002] In the bearing assembly technical field, in order to ensure the stable cooperation between bearing and rotating shaft, the conventional scheme usually adopts interference fit to realize the rigid connection of inner ring and shaft. However, in the working condition of low speed and light load or frequent maintenance, the clearance fit scheme is often used in engineering practice to reduce the assembly difficulty, but the bearing with clearance fit will produce a certain looseness. In the prior art, in order to make the position of bearing relative to shaft more stable, the bearing is installed in the bearing seat, and the bearing and the bearing seat are tightly connected by using bolts. However, the bearing designed in this way is provided with a threaded hole, which is easy to produce stress concentration and thus more easily damaged in the process of multiple disassembly and assembly. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in the prior art. To this end, the utility model provides a bearing assembly, which can improve the service life of the bearing.

[0004] The utility model further provides a shielded pump with the above bearing assembly.

[0005] According to the bearing assembly of the first aspect embodiment of the utility model, the bearing can move along the axial direction to be in the first state and the second state. The mounting seat is provided with a receiving cavity for accommodating the bearing and the central shaft. The compression piece is movably connected to the mounting seat, and the compression piece has a first abutting surface, which is arranged opposite to the bottom wall of the receiving cavity. When the bearing is in the first state, the bottom wall of the receiving cavity and the first abutting surface jointly abut the two side end faces of the bearing along the axial direction, so as to fix the bearing in the receiving cavity. When the bearing is in the second state, the first abutting surface is separated from the bearing, and the bearing can enter and exit the receiving cavity along the axial direction.

[0006] According to the bearing assembly of the utility model, at least the following beneficial effects are obtained: the bearing assembly of the utility model embodiment adds a compression piece to the mounting seat. The mounting seat does not need to be frequently disassembled, so it can be fixedly installed relative to the central shaft. Then the bearing is placed in the mounting seat and is sleeved on the central shaft. At this time, the bearing is compressed by the compression piece and the mounting seat, and is fixed in the receiving cavity of the mounting seat to be in the first state, that is, fixed relative to the central shaft. When the bearing needs to be disassembled, the first abutting surface of the compression piece is separated from the bearing. This design does not need to open a threaded hole on the bearing, which can effectively improve the service life of the bearing.

[0007] According to some embodiments of the utility model, the mounting seat includes fixed part and movable part, the fixed part can move along the axial direction relative to the movable part, part of the fixed part is located in the accommodating cavity, the compression part includes first section, second section and third section which are connected in sequence, the second section extends along the axial direction of the mounting seat, the first abutting surface is located in the first section, the second section is movably connected with the fixed part, the third section is oppositely arranged with the first section, when the bearing is in the second state, the third section is relatively closer to the central axis of the mounting seat than the first section.

[0008] According to some embodiments of the utility model, the bearing assembly further includes a clamping part, the clamping part is installed on the fixed part, when the bearing is in the first state, the clamping part is detachably connected with the second section, so that the compression part is fixed relative to the mounting seat.

[0009] According to some embodiments of the utility model, the clamping part includes a pin, two groups of clamping blocks which are symmetrically arranged along the central axis of the pin and elastic members, the pin is installed on the fixed part, one end of the clamping block is rotatably connected with the pin, the other end of the clamping block is used for clamping the second section, the two ends of the elastic member are respectively connected with the other end of the clamping block and the fixed part, and the elastic force of the elastic member is used to drive the clamping block to rotate towards the central axis of the pin.

[0010] According to some embodiments of the utility model, when the bearing is in the second state, the end of the clamping block away from the pin abuts against the second section, so that the third section is relatively closer to the central axis of the mounting seat than the first section.

[0011] According to some embodiments of the utility model, the side surface of the clamping block used for abutting against the second section is a concave arc surface, and the outer surface of the second section is a circumferential surface.

[0012] According to some embodiments of the utility model, the movable part includes a bolt and a connecting plate, the shank of the bolt is arranged through the fixed part, the head of the bolt is arranged in the accommodating cavity, and the end of the bolt away from the head is threadedly connected with the connecting plate.

[0013] According to some embodiments of the utility model, the third section has straight second abutting surface and third abutting surface, the second abutting surface is inclined to the third abutting surface, when the bearing is in the first state, the second abutting surface is in abutment with the movable part, when the bearing is in the second state, the third abutting surface is in abutment with the movable part.

[0014] According to some embodiments of the utility model, the bearing is a graphite bearing.

[0015] According to the shielding pump of the second aspect embodiment of the utility model, the bearing assembly of any one of the first aspect embodiment and the rotating shaft are provided.

[0016] According to the shielding pump of the utility model embodiment, at least has following beneficial effect: shielding pump is a kind of sealless pump, pump and driving motor are sealed in a pressure vessel filled with pumped medium, realize completely leakless pump by static seal.Bearing in shielding pump and rotating shaft generally use gap fit, bearing does not need to be tightly installed on rotating shaft, therefore, by adding a compression member on mounting seat, mounting seat usually does not need to be frequently disassembled, it can be fixedly installed relative to central shaft, then bearing is placed in mounting seat and is set on rotating shaft, at this time, bearing is compressed by using compression member and mounting seat together, it is fixed in the accommodating cavity of mounting seat to be in first state, i.e. fixed relative to rotating shaft, when bearing needs to be disassembled, the first abutting surface of compression member is separated from bearing, so design does not need to open thread hole on bearing, not only can effectively improve bearing life, but also facilitate disassembly and assembly.

[0017] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further explained in connection with the drawings and embodiments, wherein:

[0019] Figure 1 It is the first perspective drawing of the bearing assembly in an embodiment of the utility model;

[0020] Figure 2 It is the first embodiment sectional view of the bearing assembly in an embodiment of the utility model;

[0021] Figure 3 It is the second embodiment sectional view of the bearing assembly in an embodiment of the utility model;

[0022] Figure 4 It is the perspective drawing of the mounting seat in an embodiment of the utility model;

[0023] Figure 5 This is a second perspective view of a bearing assembly in one embodiment of the present invention.

[0024] Reference numerals: bearing assembly 100, bearing 101, mounting base 102, fixing part 103, moving part 104, clamping part 105, receiving cavity 106, bolt 107, snap-fit ​​part 108, pin 109, snap block 110, elastic element 111, first section 201, second section 202, third section 203, first abutting surface 204, second abutting surface 205, third abutting surface 206, connecting plate 207, rotating shaft 501. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0028] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0029] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] refer to Figures 1 to 3 According to a first aspect embodiment of the present invention, a bearing assembly 100 includes a bearing 101, a mounting base 102, and a clamping member 105. The bearing 101 is axially movable to be in a first state ( Figure 3 The state shown) and the second state ( Figure 2 (As shown in the diagram). The mounting base 102 has a receiving cavity 106 for accommodating the bearing 101 and the central shaft. The clamping member 105 is movably connected to the mounting base 102 and has a first abutment surface 204, which faces the bottom wall of the receiving cavity 106. When the bearing 101 is in the first state, the bottom wall of the receiving cavity 106 and the first abutment surface 204 abut against the two axially upward end faces of the bearing 101, so that the bearing 101 is fixed in the receiving cavity 106. When the bearing 101 is in the second state, the first abutment surface 204 disengages from the bearing 101, and the bearing 101 can move in and out of the receiving cavity 106 axially. The bearing assembly 100 of this utility model embodiment adds a clamping member 105 to the mounting base 102. Since the mounting base 102 typically does not require frequent disassembly and assembly, it can be fixedly installed relative to the central shaft. Then, the bearing 101 is placed inside the mounting base 102 and fitted onto the central shaft. At this point, the clamping member 105 and the mounting base 102 together clamp the bearing 101, fixing it within the receiving cavity 106 of the mounting base 102 in a first state, i.e., fixed relative to the central shaft. When it is necessary to disassemble the bearing 101, the first abutment surface 204 of the clamping member 105 is disengaged from the bearing 101. This design eliminates the need for threaded holes in the bearing 101, effectively improving the bearing 101's lifespan. Figure 3 It can be seen that when the bearing 101 is in the first state, the clamping member 105 clamps the bearing 101 into the receiving cavity 106 of the mounting base 102. Since the mounting base 102 is fixedly installed relative to the central shaft, the bearing 101 is also fixedly installed relative to the central shaft. It does not need to be fixedly connected to the central shaft and can be installed by clearance fit or other methods.

[0031] refer to Figures 1 to 3In some embodiments of this utility model, the mounting base 102 includes a fixed part 103 and a movable part 104. The fixed part 103 can move axially relative to the movable part 104. A portion of the fixed part 103 is located in the receiving cavity 106. The clamping member 105 includes a first segment 201, a second segment 202 and a third segment 203 connected in sequence. The second segment 202 extends axially along the mounting base 102. The first abutment surface 204 is located on the first segment 201. The second segment 202 is movably connected to the fixed part 103. The third segment 203 is arranged facing the first segment 201. When the bearing 101 is in the second state, the third segment 203 is closer to the central axis of the mounting base 102 relative to the first segment 201. When bearing 101 enters receiving cavity 106, bearing 101 pushes movable part 104 to move axially, thereby causing movable part 104 to abut against third section 203 and causing second section 202 to rotate relative to fixed part 103, thereby causing first abutment surface 204 to approach and abut against the side end face of bearing 101 away from movable part 104, so that bearing 101 is in the first state. The specific movement process is as follows: First, bearing 101 as Figure 2 As shown in the second state, the two clamping members 105 open from bottom to top, allowing the bearing 101 to freely enter and exit the receiving cavity 106. When the bearing 101 moves downward, its lower end face abuts against the movable part 104, specifically against the head of the bolt 107 in this illustrated embodiment, causing the entire movable part 104 to move downward. The lower end face of the fixing part 103 abuts against the third segment 203 of the clamping member 105, causing the clamping member 105 to rotate around the position where the second segment 202 connects to the fixing part 103. The third segment 203 moves away from the central axis of the mounting base 102, while the first segment 201 moves close to the central axis of the mounting base 102, causing the first abutting surface 204 of the first segment 201 to abut against the upper end face of the bearing 101. At this time, the bearing 101 also enters the receiving cavity 106 and its lower end face abuts against the bottom wall of the receiving cavity 106, thus fixing the bearing 101 even when it is in the first state. This design simplifies the fixing of the bearing 101. Simply place the bearing 101 into the receiving cavity 106 along the axial direction. The installation is convenient and efficient, and there is no need to perform processes such as drilling holes in the bearing 101.

[0032] It should be noted that, in some embodiments of this utility model, the clamping member 105, in addition to using Figure 2The structure shown can also be designed in other shapes. For example, the clamping member 105 can be slidably connected to the fixing part 103, opening when sliding upwards and closing when sliding downwards, thus fixing the bearing 101. Alternatively, the movable part 104 can be omitted; instead, after placing the bearing 101 into the receiving cavity 106, the state of the clamping member 105 can be manually adjusted to clamp the bearing 101. Furthermore, the clamping member 105 can be made detachable; after placing the bearing 101 into the receiving cavity 106, the clamping member 105 can be fixedly installed on the mounting base 102, simultaneously providing abutment and clamping action for the bearing 101.

[0033] refer to Figure 1 , Figure 3 and Figure 4 In some embodiments of this utility model, the bearing assembly 100 further includes a snap-fit ​​portion 108, which is mounted on the fixing portion 103. When the bearing 101 is in the first state, the snap-fit ​​portion 108 is detachably connected to the second section 202 to fix the clamping member 105 relative to the mounting base 102. The snap-fit ​​portion 108 allows the clamping member 105 to better clamp the bearing 101, preventing the clamping member 105 from loosening itself when the bearing 101 is in the first state, thus improving structural stability.

[0034] refer to Figure 1 , Figure 3 and Figure 4 In some embodiments of this utility model, the locking part 108 includes a pin 109, two sets of locking blocks 110 symmetrically arranged along the central axis of the pin 109, and an elastic member 111. The pin 109 is installed on the fixing part 103. One end of the locking block 110 is rotatably connected to the pin 109, and the other end of the locking block 110 is used to clamp the second segment 202. The two ends of the elastic member 111 are respectively connected to the other end of the locking block 110 and the fixing part 103. The elastic force of the elastic member 111 is used to drive the locking block 110 to rotate toward the central axis of the pin 109. With this design, when the bearing 101 pushes the movable part 104 to move, thereby causing the clamping member 105 to rotate, the outer peripheral surface of the second segment 202 abuts against the locking block 110, thereby squeezing both locking blocks 110 and causing them to rotate around the pin 109. When the second segment 202 is as Figure 3In the indicated state, all the locking blocks 110, rotatably connected around the same pin 109, are engaged with the outer circumferential surface of the second segment 202. The elastic element 111, due to compression deformation when the second segment 202 presses against the locking blocks 110, also possesses a restoring force. This restoring force allows the locking blocks 110 to more forcefully engage the second segment 202, thereby fixing the second segment 202 relative to the mounting base 102 and preventing the clamping element 105 from loosening. This design not only facilitates the installation of the bearing 101 but also its disassembly. The engagement of the locking blocks 110 with the clamping element 105 is achieved by the restoring force of the elastic element 111; therefore, simply manually rotating the clamping element 105 disengages it from the locking blocks 110, thus transforming the bearing into its normal position. Figure 2 In the state shown, the locking block 110 itself changes under the elastic force of the elastic element 111. Figure 4 As shown in the two close-to-each-other states, the bearing 101 is easy to assemble and disassemble.

[0035] It should be noted that in some embodiments of this utility model, the snap-fit ​​part 108 can also be designed as a snap-fit, with a snap-fit ​​protrusion provided on one of the clamping member 105 or the fixing part 103, and a snap-fit ​​groove provided on the other. When the clamping member 105 is in the position of the snap-fit ​​part, the snap-fit ​​part 108 can be designed as a snap-fit ​​part. Figure 3 When the position shown is such that the clamping member 105 is directly engaged with the fixing part 103, the same technical effect can be achieved. The connection position between the clamping member 105 and the fixing part 103 is not limited to the second segment 202, and can be set in the third segment 203 or the first segment 201, or adjusted according to the specific shape of the clamping member 105. As mentioned above, the shape of the clamping member 105 is not limited to a three-segment structure.

[0036] refer to Figure 1 and Figure 2 In some embodiments of this utility model, when the bearing 101 is in the second state, the end of the locking block 110 away from the pin 109 abuts against the second section 202, so that the third section 203 is closer to the central axis of the mounting base 102 relative to the first section 201. This allows the movable part 104 to abut against the third section 203 more quickly when it moves downward, and the open form of the first section 201 also makes it easier for the bearing 101 to enter and exit. The locking block 110 abutting against the second section 202 allows the bearing 101 to be placed into the receiving cavity 106 and installed and fixed at any time without having to manually pry open the clamping member 105, making it more convenient to use.

[0037] refer to Figure 1 and Figure 4In some embodiments of this utility model, the locking block 110 is used to abut against one side of the second segment 202, which is a concave arc surface, and the outer surface of the second segment 202 is a circumferential surface. This design makes the process of the second segment 202 being inserted between the two locking blocks 110 smoother, preventing jamming during the rotation of the clamping member 105 and improving its rotational stability. Furthermore, in some embodiments of this utility model, the arc length of the locking block 110 does not exceed half the circumference of the second segment 202. This allows the second segment 202 to be easily pried open using external force after it is engaged between the locking blocks 110, without making the disassembly of the bearing 101 too difficult.

[0038] refer to Figures 1 to 3 In some embodiments of this utility model, the movable part 104 includes a bolt 107 and a connecting plate 207. The shank of the bolt 107 passes through the fixed part 103, and the head of the bolt 107 is disposed in the receiving cavity 106. The end of the bolt 107 away from the head is threadedly connected to the connecting plate 207. The design of the bolt 107 simplifies the installation and relative movement of the movable part 104 and the fixed part 103. A through hole is opened in the receiving cavity 106, the shank of the bolt 107 is inserted therein, and then the threaded end is threadedly connected to the connecting plate 207. This makes the assembly and disassembly of the movable part 104 more convenient. Further, refer to... Figures 1 to 3 In some embodiments of this utility model, a countersunk hole is also provided in the receiving cavity 106, so that when the head of the bolt 107 moves downward to the lowest point, such as Figure 3 As shown, the head of the bolt 107 is flush with the bottom wall of the receiving cavity 106, so that the receiving cavity 106 can better prevent the bearing 101 from being affected by the bolt 107, and the countersunk hole can also play a limiting role to prevent the bolt 107 from falling too low.

[0039] refer to Figure 2 and Figure 3In some embodiments of this utility model, the third segment 203 has a flat second abutment surface 205 and a third abutment surface 206. The second abutment surface 205 is inclined relative to the third abutment surface 206. When the bearing 101 is in the first state, the second abutment surface 205 abuts against the movable part 104. When the bearing 101 is in the second state, the third abutment surface 206 abuts against the movable part 104. Providing two abutment surfaces on the third segment 203 ensures sufficient contact area between the third segment 203 and the movable part 104 regardless of whether the bearing 101 is in the first or second state. In particular, the design of the third abutment surface 206 prevents the corners of the third segment 203 from abutting against the movable part 104, thus preventing wear on both the third segment 203 and the movable part 104. Furthermore, designing a smooth transition at the connection between the second abutment surface 205 and the third abutment surface 206 further reduces wear on the lower end face of the connecting plate 207 caused by the third segment 203 when the clamping member 105 rotates.

[0040] In some embodiments of this utility model, the bearing 101 is a graphite bearing. Graphite bearings have natural lubrication properties and can operate under oil-free or low-oil conditions. They can maintain good lubrication even in high-temperature, high-pressure, or corrosive environments. Due to their self-lubricating properties, high-temperature resistance, corrosion resistance, and low coefficient of friction, they can be clearance-fitted with the central shaft. Therefore, it is only necessary to place the bearing 101 into the mounting base 102, without fixing the bearing 101 to the central shaft.

[0041] refer to Figure 1 and Figure 5 The canned motor pump according to a second aspect embodiment of the present invention includes a bearing assembly 100 and a rotating shaft 501 as described in any of the first aspect embodiments, with the bearing assembly 100 sleeved on the outer periphery of the rotating shaft 501. The canned motor pump is a seal-free pump in which the pump and drive motor are sealed within a pressure vessel filled with the pumped medium, achieving a completely leak-free pump through a static seal. The bearing 101 in the canned motor pump and the rotating shaft 501 usually use a clearance fit, and the bearing 101 does not need to be tightly installed on the rotating shaft 501. Therefore, by adding a clamping member 105 to the mounting base 102, the mounting base 102 usually does not need to be frequently disassembled and can be fixedly installed relative to the central shaft. Then, the bearing 101 is placed in the mounting base 102 and sleeved on the rotating shaft 501. At this time, the bearing 101 is pressed together by the clamping member 105 and the mounting base 102, so that it is fixed in the receiving cavity 106 of the mounting base 102 in the first state, that is, fixed relative to the rotating shaft 501. When it is necessary to disassemble the bearing 101, the first abutting surface 204 of the clamping member 105 can be disengaged from the bearing 101. This design does not require the opening of a threaded hole on the bearing 101, which can not only effectively improve the service life of the bearing 101, but also facilitate disassembly and assembly.

[0042] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A bearing assembly, characterized by, The application relates to a bearing assembly. The bearing assembly comprises a bearing, a mounting base, a pressing part and a clamping part. The bearing is movable along an axial direction to be in a first state and a second state. The mounting base is provided with a receiving cavity for accommodating the bearing and a central shaft. The pressing part is movably connected to the mounting base.

2. The bearing assembly of claim 1, wherein, The pressing part has a first abutting surface which is oppositely arranged to a bottom wall of the receiving cavity. When the bearing is in the first state, the bottom wall of the receiving cavity and the first abutting surface jointly abut two end surfaces of the bearing along the axial direction, so that the bearing is fixed in the receiving cavity. When the bearing is in the second state, the first abutting surface is separated from the bearing, and the bearing can enter or exit the receiving cavity along the axial direction.

3. The bearing assembly of claim 2, wherein, The mounting base comprises a fixed part and a movable part.

4. The bearing assembly of claim 3, wherein, The fixed part is movable along the axial direction relative to the movable part.

5. The bearing assembly of claim 4, wherein, A part of the fixed part is located in the receiving cavity.

6. The bearing assembly of claim 5, wherein, The pressing part comprises a first section, a second section and a third section which are sequentially connected.

7. The bearing assembly of claim 2, wherein, The second section extends along the axial direction of the mounting base.

8. The bearing assembly of claim 2, wherein, The first abutting surface is located in the first section. The second section is movably connected to the fixed part. The third section is oppositely arranged to the first section. When the bearing is in the second state, the third section is closer to a central axis of the mounting base relative to the first section. When the bearing enters the receiving cavity, the bearing pushes the movable part to move along the axial direction, so that the movable part abuts the third section and the second section rotates relative to the fixed part. The first abutting surface is close to and abuts an end surface of the bearing which is away from the movable part, so that the bearing is in the first state. The bearing assembly further comprises the clamping part which is mounted on the fixed part. When the bearing is in the first state, the clamping part is detachably connected to the second section, so that the pressing part is fixed relative to the mounting base. The clamping part comprises a pin, two groups of clamping blocks which are symmetrically arranged along a central axis of the pin and an elastic member. The pin is mounted on the fixed part. One end of the clamping block is rotatably connected to the pin. The other end of the clamping block is used for clamping the second section. Two ends of the elastic member are respectively connected to the other end of the clamping block and the fixed part. The elastic force of the elastic member is used for driving the clamping block to rotate towards the central axis of the pin. When the bearing is in the second state, the other end of the clamping block which is away from the pin abuts the second section, so that the third section is closer to the central axis of the mounting base relative to the first section. The side surface of the clamping block which is used for abutting the second section is an inner concave arc surface. The outer surface of the second section is a circumferential surface. The movable part comprises a bolt and a connecting plate. The rod part of the bolt penetrates through the fixed part. The head part of the bolt is arranged in the receiving cavity. The end of the bolt which is away from the head part is threadedly connected to the connecting plate. The third section has a flat second abutting surface and a third abutting surface. The second abutting surface is inclined relative to the third abutting surface. When the bearing is in the first state, the second abutting surface abuts the movable part. When the bearing is in the second state, the third abutting surface abuts the movable part.

9. The bearing assembly of claim 1, wherein, The bearing is a graphite bearing.

10. A canned pump characterized by The canned pump comprises the bearing assembly according to any one of claims 1-9 and a rotating shaft, the bearing assembly being sleeved outside the rotating shaft.

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