The bearing assembly of the linear motor and the linear motor

Abstract

This invention discloses a bearing assembly for a linear motor and the linear motor itself. The bearing assembly includes: bearing balls; a bearing mounting component with bearing mounting holes, wherein the bearing balls are radially movable within the bearing mounting holes; a bearing bush, at least a portion of which is disposed within the bearing mounting component; and an elastic component disposed on the outer periphery of the bearing balls, which undergoes radial elastic deformation when the bearing balls are subjected to radial force. When the guide rod bears a small load, the bearing balls and guide rod undergo rolling friction, resulting in a small contact area and low friction between the bearing assembly and the guide rod. When the guide rod bears a large load, the bearing bush and guide rod undergo sliding friction. By changing the friction mode between the guide rod and the bearing assembly, different loads can be addressed, thereby improving the service life of the bearing assembly. Furthermore, since rolling friction is predominant between the guide rod and the bearing assembly, the stick-slip effect is significantly reduced, thereby decreasing vibration and noise in the linear motor.

Description

Technical Field

[0001] This invention relates to the field of linear motor technology, and in particular to a bearing assembly for a linear motor and the linear motor itself. Background Technology

[0002] In related technologies, a linear motor includes a primary component, a secondary component, and a bearing assembly. The secondary component is movable relative to the primary component along the axial direction of the secondary component. The bearing assembly includes a bushing and bearing balls. The bushing is disposed between the primary component and the secondary component, and the bearing balls are rotatably disposed in the bushing.

[0003] However, existing linear motor bearing assemblies also have significant drawbacks: the bearing balls are mounted on bushings, and the bearing assembly is fixed to the motor housing. In this case, the radial pressure on the bearing balls is relatively large. When the guide rod moves linearly, it will oscillate radially, and the balls will be at risk of breaking or falling off due to the radial pressure. When the guide rod bears a larger load, the bearing assembly and the guide rod cannot slide and rub against each other, which affects the service life of the bearing assembly. Moreover, when it is radially fixed, the rolling of the bearing balls is restricted, the rolling friction is large, and the stick-slip effect cannot be reduced, resulting in greater vibration and noise in the linear motor. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a bearing assembly for a linear motor, which can greatly reduce the stick-slip effect and reduce the vibration and noise of the linear motor.

[0005] The present invention further proposes a linear motor.

[0006] The bearing assembly of the linear motor according to the present invention includes: bearing balls; a bearing mounting member having a bearing mounting hole, wherein the bearing balls are radially movably disposed in the bearing mounting hole; a bearing bush, at least a portion of which is disposed inside the bearing mounting member, wherein the bearing balls protrude inwardly from the inner surface of the bearing bush in the radial direction; and an elastic component disposed on the outer periphery of the bearing balls, wherein when the bearing balls are subjected to radial force, the bearing balls press against the elastic component, and the elastic component undergoes elastic deformation in the radial direction.

[0007] According to the bearing assembly of the linear motor of the present invention, when the guide rod bears a small load, the bearing balls and the guide rod undergo rolling friction, resulting in a small contact area and low friction between the bearing assembly and the guide rod. When the guide rod bears a large load, the bearing bush and the guide rod undergo sliding friction. By changing the friction mode between the guide rod and the bearing assembly, different loads can be handled, and the service life of the bearing assembly can be improved. Moreover, since the friction between the guide rod and the bearing assembly is mainly rolling friction, the stick-slip effect can be greatly reduced, thereby reducing the vibration and noise of the linear motor.

[0008] In some examples of the present invention, the elastic component includes a guide rail and an elastic element, the guide rail being disposed inside the elastic element and covering the radially outer side of the bearing balls.

[0009] In some examples of the present invention, the upper end of the bearing mounting component is provided with a first oil storage cavity, the first oil storage cavity is connected to the interior of the bearing mounting component, the bearing mounting component is provided with an oil channel, and the lower end of the elastic member is provided with an oil inlet, the oil inlet being connected to the first oil storage cavity through the oil channel.

[0010] In some examples of the present invention, the lower end of the elastic element is further provided with an air outlet, which is connected to the first oil storage cavity.

[0011] In some examples of the present invention, the elastic component further includes: a first sealing member and a second sealing member, wherein the first sealing member is used to seal the oil inlet and the second sealing member is used to seal the air outlet.

[0012] In some examples of the present invention, a second oil reservoir is provided at the lower end of the bearing mounting component, the second oil reservoir is in communication with the interior of the bearing mounting component, and a connecting channel is provided inside the bearing mounting component, through which the first oil reservoir is in communication with the second oil reservoir.

[0013] In some examples of the present invention, the bearing assembly of the linear motor further includes a limiting member, which is sleeved on the outside of the bearing mounting member and is used to limit the elastic component in the axial direction.

[0014] In some examples of the present invention, the bearing mounting member has a plurality of bosses on its inner side, the plurality of bosses being spaced apart in the circumferential direction, and the plurality of bosses abutting the radial outer side of the bearing bush.

[0015] In some examples of the present invention, the bearing bush is a copper-tin alloy structural component, a PTFE structural component, or a PEEK structural component.

[0016] The linear motor according to the present invention includes: the bearing assembly of the linear motor described above.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1This is a first structural schematic diagram of the bearing assembly of a linear motor according to an embodiment of the present invention; Figure 2 This is a first cross-sectional view of the bearing assembly of a linear motor according to an embodiment of the present invention; Figure 3 This is a second cross-sectional view of the bearing assembly of a linear motor according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the first part of the bearing assembly of a linear motor according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the second part of the bearing assembly of a linear motor according to an embodiment of the present invention; Figure 6 This is a second structural schematic diagram of the bearing assembly of a linear motor according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of a linear motor according to another embodiment of the present invention; Figure 8 This is a first cross-sectional view of a linear motor according to another embodiment of the present invention; Figure 9 This is a second sectional view of a linear motor according to another embodiment of the present invention; Figure 10 This is a third sectional view of a linear motor according to another embodiment of the present invention; Figure 11 This is a fourth sectional view of a linear motor according to another embodiment of the present invention; Figure 12 This is a fifth cross-sectional view of a linear motor according to another embodiment of the present invention.

[0019] Figure label: 1. Bearing assembly; 10. Bearing ball; 20. Bearing mounting component; 200. Bearing mounting hole; 201. First oil reservoir; 202. Second oil reservoir; 203. Boss; 30. Bearing bush; 40. Elastic component; 400. Guide rail; 401. Elastic component; 402. Oil inlet; 403. Air outlet; 404. First sealing component; 405. Second sealing component; 50. Limiting component; 2. Linear motor; 600. Three-phase connector; 601. Tower top; 602. Air spring bladder; 603. Dust cover; 604. Housing; 605. Low-voltage wiring harness; 606. Fork arm; 607. Spindle; 608. Magnet; 609. Stator core; 610. Electromagnetic air gap; 611. Stator winding; 612. Upper bearing; 613. Coolant flow channel; 614. Guide rod. Detailed Implementation

[0020] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0021] The following is for reference. Figures 1-12 A bearing assembly 1 of a linear motor according to an embodiment of the present invention is described.

[0022] like Figure 1 , Figure 6 and Figures 10-12 As shown, the bearing assembly 1 of the linear motor according to an embodiment of the present invention includes: bearing balls 10, bearing mounting parts 20, bearing bushes 30, and elastic components 40. The bearing balls 10 can achieve low-friction, high-precision linear motion; the bearing mounting parts 20 can be used to install other components; the bearing bushes 30 can form a low-friction, high-load-bearing sliding contact surface between the guide rod 614 and the bearing assembly; and the elastic components 40 can play a vibration damping and buffering role.

[0023] like Figure 2 As shown, the bearing mounting component 20 is provided with a bearing mounting hole 200, and the bearing ball 10 is radially movable and disposed in the bearing mounting hole 200. The bearing mounting hole 200 serves a mounting function and can be used to install the bearing ball 10. The contact surface between the bearing mounting hole 200 and the bearing ball 10 is curved, which reduces the rolling friction of the bearing ball 10 and limits the minimum inner diameter of the bearing ball 10's movement. The bearing ball 10 is radially movable and disposed in the bearing mounting hole 200, at which time the bearing ball 10 can roll and rub against the surface of the guide rod 614. The contact area between the bearing assembly and the surface of the guide rod 614 is small, resulting in low friction.

[0024] like Figure 1 and Figure 6 As shown, at least a portion of the bearing bush 30 is disposed inside the bearing mounting member 20. In the radial direction, the bearing balls 10 protrude inward from the inner surface of the bearing bush 30. The fact that at least a portion of the bearing bush 30 is disposed inside the bearing mounting member 20 allows the bearing bush 30 to slide against the surface of the guide rod 614. The bearing balls 10 protrude inward from the inner surface of the bearing bush 30 in the radial direction allows them to roll against the surface of the guide rod 614. When the guide rod 614 is subjected to radial force, vibration, or displacement, the bearing balls 10 can be adjusted by pressure. The sliding friction between the guide rod 614 and the surface of the bearing bush 30 prevents the bearing balls 10 from falling off or breaking, thereby improving the service life of the bearing assembly.

[0025] The elastic component 40 is disposed on the outer periphery of the bearing ball 10. When the bearing ball 10 is subjected to radial force, the bearing ball 10 presses against the elastic component 40, and the elastic component 40 undergoes elastic deformation in the radial direction. That is to say, when the guide rod 614 moves, the bearing ball 10 is subjected to radial force and moves outward in the radial direction. At this time, the bearing ball 10 will squeeze the elastic component 40, and the elastic component 40 can undergo elastic deformation, which can play a role in vibration damping and buffering.

[0026] Therefore, when the guide rod 614 bears a small load, the bearing balls 10 and the guide rod 614 undergo rolling friction, resulting in a small contact area and low friction between the bearing assembly and the guide rod 614. When the guide rod 614 bears a large load, the bearing bush 30 and the guide rod 614 undergo sliding friction. By changing the friction mode between the guide rod 614 and the bearing assembly, different loads can be handled, and the service life of the bearing assembly can be improved. Moreover, since the friction between the guide rod 614 and the bearing assembly is mainly rolling friction, the stick-slip effect can be greatly reduced, thereby reducing the vibration and noise of the linear motor 2.

[0027] Specifically, such as Figures 1-3 , Figure 5 , Figure 6 , Figure 10 and Figure 12 As shown, the elastic component 40 includes a guide rail 400 and an elastic element 401. The guide rail 400 is disposed inside the elastic element 401 and covers the radially outer side of the bearing balls 10. The guide rail 400 and the elastic element 401 are components of the elastic component 40. The guide rail 400 can support the rolling of the bearing balls 10, and the elastic element 401 can dampen and buffer. The guide rail 400 is disposed inside the elastic element 401 and covers the radially outer side of the bearing balls 10. That is, the guide rail 400 is disposed on the radially outer side of the bearing balls 10, and the elastic element 401 is disposed on the radially outer side of the guide rail 400. When the guide rod 614 moves, the bearing balls 10 are subjected to radial force and move outward in the radial direction. At this time, the bearing balls 10 will squeeze the guide rail 400. The elastic element 401 is compressed, and the elastic element 401 can undergo elastic deformation, which can play a role in vibration damping and buffering. It can ensure the radial load-bearing capacity of the bearing assembly while having load self-adaptive capability. When the radial load is large, the elastic element 401 is compressed and the gap decreases, the bearing shell 30 can contact the guide rail 400, and the radial contact load is borne by sliding friction. This can prevent the bearing balls 10 from damaging the sliding surface of the guide rod 614 when the radial load is too large. When the bearing assembly is subjected to a large radial load, the elastic element 401 is compressed and absorbs energy, and the gap between the bearing assembly and the guide rod 614 achieves self-adjustment, which can reduce the vibration and noise of the motor movement.

[0028] Among them, such as Figures 3-6 , Figure 10 and Figure 11 As shown, a first oil reservoir 201 is provided at the upper end of the bearing mounting component 20, and the first oil reservoir 201 is connected to the interior of the bearing mounting component 20. The first oil reservoir can lubricate the bearing balls 10 and the sliding friction surface, resulting in better durability. Since the first oil reservoir 201 is connected to the interior of the bearing mounting component 20, the oil in the first oil reservoir 201 can adhere to the surface of the bearing balls 10 through surface tension, achieving sufficient lubrication during the rolling of the bearing balls 10. The first oil reservoir 201 is located at the upper end of the bearing mounting component 20, where the oil can supply lubrication to the bearing balls 10 under the combined action of gravity and capillary force. This eliminates the need for components such as hydraulic pumps and overflow valves, resulting in a simple structure suitable for linear motors 2. It should be noted that compared to lubrication methods such as graphite and grease, oil coverage is more uniform, surface friction is lower, and motion noise is reduced. Furthermore, the amount of oil is adjustable, leading to better durability of the bearing assembly and extending its service life.

[0029] like Figure 1 , Figure 2 and Figure 10 As shown, an oil channel is provided inside the bearing mounting component 20, and an oil inlet 402 is provided at the lower end of the elastic element 401. The oil inlet 402 is connected to the first oil storage chamber 201 through the oil channel. The oil channel can be used for oil flow, and oil or heated and melted grease can be injected into the oil inlet 402. The oil inlet 402 is connected to the first oil storage chamber 201 through the oil channel. At this time, the oil or heated and melted grease can enter the first oil storage chamber 201 through the oil channel. Then, the oil adheres to the surface of the bearing ball 10 through surface tension, which can achieve sufficient lubrication when the bearing ball 10 rolls. The oil inlet 402 is located at the bottom of the bearing assembly, so the inlet needs to be inverted when adding oil or grease. Depending on the actual needs, it can be liquid oil or semi-solid grease. It should be noted that, since the linear motor 2 operates under normal conditions with low radial load and low speed, low frictional heat generation and low temperature rise, the lubrication requirement is low. At this time, it can be set to grease at normal temperature. Due to its high viscosity, the oil supply is small under the action of gravity and capillary force, which can achieve low loss. When the linear motor 2 is under high-speed load for a long time, the frictional heat generation increases and the temperature rise of the bearing assembly increases. The grease is heated and its viscosity decreases. Under the action of gravity and capillary force, the oil supply increases, which can achieve adaptive supply when the load increases.

[0030] Furthermore, such as Figure 1 , Figure 2 and Figure 10As shown, the lower end of the elastic element 401 is also provided with an air outlet 403, which is connected to the first oil reservoir 201. The air outlet 403 can play a role in venting air. Since the air outlet 403 is connected to the first oil reservoir 201, the air in the first oil reservoir 201 can be discharged through the air outlet 403, thereby maintaining the pressure balance of the first oil reservoir 201 and ensuring the normal operation of the lubrication system.

[0031] In addition, such as Figure 1 , Figure 4 and Figure 6 As shown, the elastic component 40 also includes a first sealing member 404 and a second sealing member 405. The first sealing member 404 is used to seal the oil inlet 402, and the second sealing member 405 is used to seal the vent 403. The first sealing member 404 and the second sealing member 405 are components of the elastic component 40 and both can play a sealing role. The first sealing member 404 is used to seal the oil inlet 402, which can prevent dust, moisture, impurities, etc. from entering the first oil storage chamber 201 through the oil channel, thus avoiding contamination of the oil or damage to precision surfaces. Secondly, it can prevent oil from overflowing from the oil inlet 402. In addition, it can maintain the cleanliness and sealing integrity of the bearing assembly. The second sealing member 405 is used to seal the vent 403, which can prevent the intake of moisture, dust, salt spray, etc., thereby preventing oil emulsification or component corrosion. In addition, it can prevent oil droplets carried by oil vapor in the first oil storage chamber 201 from escaping from the vent 403, thus reducing losses.

[0032] It should be noted that, as Figure 6 As shown, a second oil reservoir 202 is provided at the lower end of the bearing mounting component 20. The second oil reservoir 202 is connected to the interior of the bearing mounting component 20. A connecting channel is provided inside the bearing mounting component 20, through which the first oil reservoir 201 is connected to the second oil reservoir 202. The second oil reservoir 202 can increase the oil storage capacity. Since the second oil reservoir 202 is connected to the interior of the bearing mounting component 20, when the oil in the first oil reservoir 201 is depleted, the oil in the second oil reservoir 202 can be driven by the lowest bearing ball 10 to cover the sliding surface of the guide rod 614 to achieve a lubrication effect. The connecting channel within the bearing mounting component 20 serves as a connection, allowing the first oil reservoir 201 to connect with the second oil reservoir 202. This enables better lubrication and improves the service life of the bearing assembly.

[0033] In addition, such as Figure 1 and Figure 10As shown, the bearing assembly 1 of the linear motor also includes a limiting member 50, which is sleeved on the outside of the bearing mounting member 20. Axially, the limiting member 50 is used to limit the elastic component 40. The limiting member 50 functions as a limiter; sleeved on the outside of the bearing mounting member 20, it axially limits and fixes the elastic component 40, preventing it from falling off and thus improving the service life of the bearing assembly.

[0034] Optionally, such as Figure 2 and Figure 5 As shown, the bearing mounting component 20 has multiple bosses 203 on its inner side. These bosses 203 are spaced apart circumferentially and abut against the radially outer side of the bearing bush 30. The bosses 203 provide support. The circumferential spacing of the bosses 203 prevents interference between them and allows for a wider distribution, thus improving their support effect. The abutments against the radially outer side of the bearing bush 30 provide support, ensuring that at least a portion of the bearing bush 30 is positioned inside the bearing mounting component 20.

[0035] In addition, such as Figure 1 and Figure 6 As shown, the bearing bush 30 is a copper-tin alloy structural component, a PTFE structural component, or a PEEK structural component. Copper-tin alloy structural components have high load-bearing capacity and can quickly dissipate frictional heat, preventing local overheating that could lead to seizing or damage to the bearing bush 30. They can accommodate minute impurities in the oil and form a stable oil film on the surface. PTFE (polytetrafluoroethylene) structural components have an extremely low coefficient of friction, achieving self-lubrication even in oil-free conditions. They also have excellent chemical stability, are not prone to foreign matter adhesion, and are insulating. PEEK (polyetheretherketone) structural components have high strength and rigidity, excellent overall temperature resistance, good self-lubrication, corrosion resistance, and are lightweight. By using one of the copper-tin alloy, PTFE, or PEEK structural components for the bearing bush 30, it better meets the actual working conditions, exhibiting good wear resistance and a low coefficient of friction. When the guide rod 614 is subjected to radial force, vibration, or offset, the bearing balls 10 can be adjusted under pressure. The guide rod 614 contacts the surface of the bearing bush 30 for sliding friction, which can prevent the bearing balls 10 from falling off or breaking, thereby improving the service life of the bearing assembly. It should be noted that the bearing bush 30 can also be made of composite materials. The inner sliding surface of the bearing bush 30 can be covered with a wear-resistant coating, a low coefficient of friction, or a self-lubricating coating. This can reduce its coefficient of friction and extend its service life.

[0036] The linear motor 2 according to an embodiment of the present invention includes: the bearing assembly 1 of the linear motor described in the above embodiments.

[0037] It should be noted that, as Figures 7-12 As shown, the linear motor 2 also includes a three-phase connector 600, a tower top 601, a spring jacket 602, a dust cover 603, a housing 604, a low-voltage wiring harness 605, a fork arm 606, a spindle 607, a magnet 608, a stator core 609, an electromagnetic air gap 610, a stator winding 611, an upper bearing 612, a coolant flow channel 613, and a guide rod 614. The bearing is divided into an upper bearing 612 that contacts the spindle 607 and a bearing assembly that contacts the guide rod 614. The spindle 607 of the linear motor 2 is a relatively fixed component. The upper bearing 612 is fixed to the housing 604 assembly by a positioning spring. The magnet 608 is installed inside the housing 604 assembly. The stator core 609 and the winding coil are installed at the lower end of the spindle 607. Under the action of current, electromagnetic force is generated, which drives the linear motor 2. The housing 604 assembly and others move linearly up and down along the spindle 607. The bearing assembly is fixed inside the spindle 607 by a positioning snap ring and contacts the guide rod 614 fixed at the bottom of the housing 604 assembly. The spindle 607 is provided with a coolant channel 613 to remove the heat generated by the motor stator core 609, winding coil, bearing assembly and upper bearing 612. When the linear motor 2 is working, the upper bearing 612 moves with the housing 604 assembly. The inner surface of the upper bearing 612 rubs against the outer surface of the spindle 607, and the inner surface of the bearing assembly rubs against the outer surface of the guide rod 614 moving with the housing 604 assembly. The bearing assembly can bear the axial and radial forces when the linear motor 2 moves, and the low friction of the contact surface can reduce the noise when the linear motor 2 moves.

[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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 invention.

[0039] In the description of this invention, "first feature" and "second feature" may include one or more of the features. In the description of this invention, "a plurality of" means two or more. In the description of this invention, "above" or "below" the second feature may include direct contact between the first and second features, or it may include contact between the first and second features not being in direct contact but through another feature between them. In the description of this invention, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0040] In the description of this specification, references to terms such as "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 the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0041] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A bearing assembly (1) for a linear motor, characterized in that, include: Bearing balls (10); The bearing mounting component (20) is provided with a bearing mounting hole (200), and the bearing ball (10) is radially movable in the bearing mounting hole (200). The bearing bush (30), at least a portion of the bearing bush (30) is disposed inside the bearing mount (20), and in the radial direction, the bearing balls (10) protrude inwardly from the inner surface of the bearing bush (30); An elastic component (40) is disposed on the outer periphery of the bearing ball (10). When the bearing ball (10) is subjected to radial force, the bearing ball (10) presses against the elastic component (40), and the elastic component (40) undergoes elastic deformation in the radial direction.

2. The bearing assembly (1) of the linear motor according to claim 1, characterized in that, The elastic component (40) includes a guide rail (400) and an elastic element (401), wherein the guide rail (400) is disposed inside the elastic element (401) and the guide rail (400) covers the radially outer side of the bearing ball (10).

3. The bearing assembly (1) of the linear motor according to claim 2, characterized in that, The upper end of the bearing mounting component (20) is provided with a first oil storage chamber (201), which is connected to the interior of the bearing mounting component (20). The bearing mounting component (20) is provided with an oil channel, and the lower end of the elastic element (401) is provided with an oil inlet (402). The oil inlet (402) is connected to the first oil storage chamber (201) through the oil channel.

4. The bearing assembly (1) of the linear motor according to claim 3, characterized in that, The lower end of the elastic element (401) is also provided with an air outlet (403), which is connected to the first oil storage chamber (201).

5. The bearing assembly (1) of the linear motor according to claim 4, characterized in that, The elastic component (40) further includes: a first sealing member (404) and a second sealing member (405), wherein the first sealing member (404) is used to seal the oil inlet (402) and the second sealing member (405) is used to seal the air outlet (403).

6. The bearing assembly (1) of the linear motor according to claim 3, characterized in that, The lower end of the bearing mounting component (20) is provided with a second oil storage chamber (202), which is connected to the interior of the bearing mounting component (20). The bearing mounting component (20) is provided with a connecting channel, and the first oil storage chamber (201) is connected to the second oil storage chamber (202) through the connecting channel.

7. The bearing assembly (1) of the linear motor according to claim 1, characterized in that, Also includes: A limiting member (50) is sleeved on the outside of the bearing mounting member (20). In the axial direction, the limiting member (50) is used to limit the elastic component (40).

8. The bearing assembly (1) of the linear motor according to claim 1, characterized in that, The bearing mounting component (20) has a plurality of bosses (203) on its inner side. The plurality of bosses (203) are spaced apart in the circumferential direction, and the plurality of bosses (203) abut against the radial outer side of the bearing bush (30).

9. The bearing assembly (1) of the linear motor according to claim 1, characterized in that, The bearing bush (30) is a copper-tin alloy structural component, a PTFE structural component, or a PEEK structural component.

10. A linear motor (2), characterized in that, include: The bearing assembly (1) of the linear motor according to any one of claims 1-9.

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