A bearing motor

Abstract

An embodiment of the present invention discloses a bearing motor, which relates to the technical field of motors; the bearing motor includes a stator assembly and a rotor assembly; wherein, a bearing ring is arranged on the inner ring of the stator assembly; the circumferential edge of the rotor assembly is slidably matched with the bearing ring through a plurality of friction posts arranged at intervals to rotate relative to the stator assembly. This bearing motor can directly transmit power to the rotor assembly to drive the rotor assembly to rotate relative to the stator assembly, eliminating the use of multiple components for power transmission, saving costs and ensuring transmission accuracy; at the same time, the rotor assembly is directly matched with the bearing ring through friction posts, which can replace small bearings with short service lives, effectively improving the reliability and service life, and having lower requirements for machining accuracy, thereby effectively ensuring the stability and service life of the entire bearing motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular, to a bearing motor. Background Art

[0002] At present, in traditional rotating motors, there is basically air between the stator and the rotor, and then they are connected by the front and rear end covers, which are the third components. The rotor rotates through the bearings assembled in the front and rear end covers. In order to ensure that the air gap between the stator and the rotor is uniform and there is no scraping, it is necessary to require that the machining precision of the supporting parts (housing) of the stator, the supporting parts (rotating shaft) of the rotor, and their connecting parts, the front and rear end covers, reaches a certain requirement. However, due to the tolerance accumulation of multiple components, it is very difficult to truly meet the design requirements of a uniform air gap.

[0003] At the same time, the unbalance caused by component machining, uneven material, and assembly, the radial inertia, axial inertia of the rotor rotation, and other additional forces all act on the precision-machined balls, needles, etc. inside the bearings. It can be imagined that once the balls or needles are damaged, the entire motor will enter a vicious cycle. This also makes the small and delicate bearings that are easy to be damaged by machining need to bear a rotor that is many times heavier than it, and bear the eccentric impact force brought by high-speed rotation, thus being more prone to damage and affect its service life. Summary of the Invention

[0004] The purpose of the present invention is to provide a bearing motor, which can directly drive the rotor assembly to rotate relative to the stator assembly, eliminating the use of multiple components for power transmission, saving costs, and ensuring transmission accuracy. At the same time, the rotor assembly directly cooperates with the bearing ring through the friction columns, which can replace the small and short-lived bearings, effectively improving the reliability and service life, and having lower requirements for machining precision, thereby effectively ensuring the stability and service life of the entire bearing motor.

[0005] The embodiments of the present invention are implemented as follows:

[0006] The present invention provides a bearing motor, including: a stator assembly and a rotor assembly;

[0007] A bearing ring is arranged on the inner ring of the stator assembly;

[0008] The circumferential edge of the rotor assembly is slidably mated with the bearing ring through a plurality of friction columns arranged at intervals to rotate relative to the stator assembly.

[0009] In an alternative embodiment, the rotor assembly includes a first rotor core, and a plurality of mating grooves corresponding to the plurality of friction columns are formed on the first rotor core. Each friction column is inserted and mated with the mating groove at the corresponding position; and each friction column has a sliding portion extending from the mating groove, and the sliding portion is used for slidably mating with the bearing ring.

[0010] In an alternative embodiment, a groove is formed in one of each mating groove and the friction post at the corresponding position, and a protrusion is provided on the other of each mating groove and the friction post at the corresponding position, and the protrusion is inserted into and engaged with the groove.

[0011] In an alternative embodiment, the groove is formed in the groove wall of the mating groove, and the protrusion is correspondingly provided on the side wall of the friction post.

[0012] In an alternative embodiment, the number of grooves is two, and the two grooves are respectively formed in two opposite groove walls of the mating groove, and each groove communicates with the mating groove; two protrusions are provided on each friction post, and the two protrusions respectively protrude from two sides of the friction post to be respectively inserted into and engaged with the two grooves at the corresponding positions one by one.

[0013] In an alternative embodiment, an elastic member is provided in the mating groove, and the elastic member is configured to make the friction post have a tendency to move into contact with the bearing ring.

[0014] In an alternative embodiment, the elastic member is a strip spring, and the strip spring is provided between the bottom of the mating groove and the friction post;

[0015] Or,

[0016] The elastic member is a tubular spring, the elastic member is sleeved outside the friction post, and one end of the elastic member is engaged with the bottom of the mating groove, and the other end is engaged with the friction post.

[0017] In an alternative embodiment, the rotor assembly further includes a second rotor core, the second rotor core is coaxially arranged with the first rotor core, and has a first mating portion and a second mating portion located at two ends of the first rotor core, and the first mating portion and the second mating portion are used to jointly limit the axial movement of the friction post.

[0018] In an alternative embodiment, the stator assembly includes a stator core and a winding assembly, the winding assembly includes a coil and a stator skeleton, the coil is wound around the stator skeleton, and the stator skeleton is used to cooperate with the stator core.

[0019] In an alternative embodiment, a plurality of protrusion portions are provided on the inner side edge of the stator core, the stator skeleton includes a plurality of skeletons corresponding to the plurality of protrusion portions one by one, each skeleton is inserted into and engaged with the corresponding protrusion portion one by one, and the plurality of skeletons are connected end to end in sequence, and a coil is wound around the outside of each skeleton.

[0020] The embodiments of the present invention at least have the following advantages or beneficial effects:

[0021] An embodiment of the present invention provides a bearing motor, which includes a stator assembly and a rotor assembly; wherein, a bearing ring is arranged on the inner ring of the stator assembly; the circumferential edge of the rotor assembly is in sliding fit with the bearing ring through a plurality of friction columns arranged at intervals to rotate relative to the stator assembly. This bearing motor can directly transmit power to the rotor assembly to drive the rotor assembly to rotate relative to the stator assembly, eliminating the use of multiple components for power transmission, saving costs, and ensuring transmission accuracy; at the same time, the rotor assembly is directly matched with the bearing ring through friction columns, which can replace small and short-lived bearings, effectively improving reliability and service life, and having lower requirements for machining accuracy, thereby effectively ensuring the stability and service life of the entire bearing motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0023] Figure 1 Structural schematic diagram of the bearing motor provided by the embodiment of the present invention;

[0024] Figure 2 Structural schematic diagram of a rotor assembly of the bearing motor provided by the embodiment of the present invention;

[0025] Figure 3 Cross-sectional schematic diagram of a rotor assembly of the bearing motor provided by the embodiment of the present invention;

[0026] Figure 4 Structural schematic diagram of the first rotor core of the bearing motor provided by the embodiment of the present invention;

[0027] Figure 5 For Figure 4 Local enlarged view of I in;

[0028] Figure 6 Structural schematic diagram of the support column of the bearing motor provided by the embodiment of the present invention;

[0029] Figure 7 Structural schematic diagram of the second rotor core of the bearing motor provided by the embodiment of the present invention;

[0030] Figure 8 Structural schematic diagram of another rotor assembly of the bearing motor provided by the embodiment of the present invention;

[0031] Figure 9Structural schematic of the stator assembly of the bearing motor provided by the embodiment of the present invention Figure 1 ;

[0032] Figure 10 Structural schematic of the stator assembly of the bearing motor provided by the embodiment of the present invention Figure 2 ;

[0033] Figure 11 Structural schematic diagram of the stator core of the bearing motor provided by the embodiment of the present invention;

[0034] Figure 12 Structural schematic diagram of the skeleton wound with coils of the bearing motor provided by the embodiment of the present invention;

[0035] Figure 13 Structural schematic diagram of the skeleton of the bearing motor provided by the embodiment of the present invention.

[0036] Icon: 10 - Bearing motor; 101 - Stator assembly; 103 - Rotor assembly; 105 - Bearing ring; 107 - Friction column; 109 - First rotor core; 111 - Fitting groove; 113 - Sliding part; 115 - Groove; 117 - Protrusion; 121 - Band spring; 123 - Tubular spring; 125 - Second rotor core; 127 - Magnet; 129 - Mounting groove; 131 - First fitting part; 133 - Second fitting part; 135 - Stator core; 137 - Winding assembly; 139 - Coil; 141 - Stator skeleton; 143 - Skeleton; 145 - Protrusion part; 147 - Main body; 149 - First frame body; 151 - Second frame body. Detailed implementation manners

[0037] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0039] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0040] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0041] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0042] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" 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 directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0043] In the related art, the rotor of a traditional rotating motor usually rotates through bearings assembled in the front and rear end covers. It is difficult to guarantee the precision, and since the balls or needles of the bearings are easily damaged or impaired, it seriously affects the stability and service life of the motor.

[0044] In view of this, this embodiment provides a bearing motor that directly drives the rotor assembly to rotate, eliminating the intermediate components for transmitting power, which can save costs and ensure the transmission precision; at the same time, by using friction columns in cooperation with bearing rings, it can replace the bearings that are small and have a short service life, and can effectively ensure the stability and service life of the entire bearing motor. The structure and working principle of this bearing motor will be introduced in detail below.

[0045] Figure 1 is a schematic structural diagram of the bearing motor 10 provided in this embodiment; Figure 2 is a schematic structural diagram of a rotor assembly 103 of the bearing motor 10 provided in this embodiment; Figure 3 is a sectional view of a rotor assembly 103 of the bearing motor 10 provided in this embodiment. Please refer to Figures 1 to 3, in this embodiment, the bearing motor 10 mainly includes a stator assembly 101 and a rotor assembly 103.

[0046] Specifically, please refer back to Figures 1 to 3 , in this embodiment, a bearing ring 105 is provided on the inner ring of the stator assembly 101. Among them, through the setting of the bearing ring 105, the rotor assembly 103 can rotate relative to the stator assembly 101, which is beneficial to directly drive the movement of the rotor assembly 103. It should be noted that in this embodiment, the bearing ring 105 is prepared by powder metallurgy, and its material is a copper and iron powder assembly, and lubricating oil can be added inside it according to design requirements. Due to its low density and gaps between the powders, it forms a function equivalent to that of capillaries, so that the oil seeps out to lubricate the inner surface of the bearing ring 105 in the hot state, playing a lubricating role to ensure the smooth rotation of the rotor assembly 103. At the same time, when the bearing motor 10 cools to a certain temperature, the oil is absorbed back into the gaps of the powder metallurgy of the bearing ring 105 to ensure the cleanliness and safety of the bearing motor 10.

[0047] Specifically, please refer back to Figures 1 to 3 , in this embodiment, the circumferential edge of the rotor assembly 103 is in sliding fit with the bearing ring 105 through a plurality of friction posts 107 arranged at intervals to rotate relative to the stator assembly 101. The number of friction posts 107 is multiple. For example, in this embodiment, specifically eight support posts are selected and arranged at intervals along the axis edge of the rotor assembly 103. By setting like this, on the one hand, the bearing motor 10 can directly transmit power to the rotor assembly 103 to drive the rotor assembly 103 to rotate, saving the use of multiple parts for power transmission, which can save costs and ensure the transmission accuracy; on the other hand, since the rotor assembly 103 is directly in contact with the bearing ring 105 through the friction posts 107, it can also replace small bearings with short service lives, effectively improving the reliability and service life of the rotor assembly 103, and having lower requirements for processing accuracy, thereby effectively ensuring the stability and service life of the entire bearing motor 10. Of course, in other embodiments, the number of support posts can also be selected and adjusted according to needs, which is not limited in this embodiment.

[0048] Figure 4 is a schematic structural diagram of the first rotor core 109 of the bearing motor 10 provided in this embodiment;

[0049] Figure 5 is Figure 4 a partial enlarged view of part I of Figure 6 is a schematic structural diagram of the support post of the bearing motor 10 provided in this embodiment. Please refer to Figures 4 to 6, in this embodiment, the rotor assembly 103 includes a first rotor core 109. A plurality of fitting grooves 111 corresponding to the plurality of friction posts 107 one by one are formed in the first rotor core 109, that is, eight fitting grooves 111 are formed. The eight fitting grooves 111 are arranged in a circular array so that each friction post 107 is inserted and fitted with the fitting groove 111 at the corresponding position. At the same time, each friction post 107 has a strip-shaped structure, and a sliding portion 113 extending out of the fitting groove 111 is provided at the end of each friction post 107. The sliding portion 113 is used for slidingly fitting with the bearing ring 105, so as to directly drive the rotor assembly 103 to rotate relative to the stator assembly 101.

[0050] At the same time, by such an arrangement, on the one hand, most of the structure of the friction post 107 can be accommodated in the fitting groove 111, so as to ensure the stability and reliability of the friction post 107 during the rotation of the rotor assembly 103, and further ensure the stability and reliability of the entire bearing motor 10; on the other hand, since the sliding portion 113 of the friction post 107 can extend out of the fitting groove 111, it is also convenient for it to cooperate with the bearing ring 105, thereby replacing the cooperation process between the bearing and the ball or needle roller in the prior art, ensuring the cooperation precision and strength, reducing the probability of damage or wear of the bearing motor 10, and thus ensuring the service life of the bearing motor 10.

[0051] As an alternative solution, please refer to again Figures 4 to 6 , in this embodiment, a groove 115 is formed on one of each fitting groove 111 and the friction post 107 at the corresponding position, and a protrusion 117 is provided on the other of each fitting groove 111 and the friction post 107 at the corresponding position. The protrusion 117 is inserted and fitted with the groove 115. By such an arrangement, when the friction post 107 is fitted with the fitting groove 111, the protrusion 117 can also be fitted with the groove 115, so as to further ensure the stability and reliability of the friction post 107, thereby ensuring the stability of the rotation process of the rotor assembly 103 relative to the stator assembly 101, and further ensuring the reliability of the operation of the bearing motor 10.

[0052] Specifically, in this embodiment, the groove 115 is formed on the groove wall of the fitting groove 111, and the protrusion 117 is correspondingly provided on the side wall of the friction post 107. Forming the groove 115 on the groove wall of the fitting groove 111 enables the groove 115 to be used for lateral and radial positioning of the friction post 107 to fully ensure the stability of the friction post 107.

[0053] More specifically, the number of the grooves 115 is two, and the two grooves 115 are respectively formed on two opposite groove walls of the mating groove 111, and each groove 115 communicates with the mating groove 111. Correspondingly, two protrusions 117 are provided on each friction post 107, and the two protrusions 117 protrude from two sides of the friction post 107 respectively, so as to be inserted and matched with the two grooves 115 at corresponding positions one by one. Through the one-to-one insertion and matching of the two protrusions 117 and the two grooves 115, the radial position of the friction post 107 can be effectively limited, so that it is not easy to escape from the mating groove 111, and the stability and reliability of its contact with the bearing ring 105 can be effectively ensured, thereby ensuring the reliability and stability of the bearing motor 10. Of course, in other embodiments, the number of the grooves 115 and the protrusions 117 can also be selected and adjusted according to requirements; at the same time, in this embodiment, a protrusion ring can also be provided on the outer circumference of the friction post 107, and two ends of the protrusion ring respectively form two protrusions 117, which is not limited in this embodiment.

[0054] Figure 7 This is a schematic structural view of the second rotor core 125 of the bearing motor 10 provided in this embodiment. Please refer to Figure 1 With Figure 7 , in this embodiment, the rotor assembly 103 further includes a second rotor core 125. The second rotor core 125 is coaxially arranged with the first rotor core 109, and has a first mating portion 131 and a second mating portion 133 located at both ends of the first rotor core 109. The shapes and sizes of the first mating portion 131 and the second mating portion 133 are adapted to the shapes and sizes of the first rotor core 109, and are used to jointly limit the axial movement of the friction post 107. That is, through the cooperation of the first rotor core 109 and the second rotor core 125, both ends of the friction post 107 can be respectively abutted and matched with the first mating portion 131 and the second mating portion 133, so as to fully limit and enclose its axial movement, thereby further ensuring the stability and reliability of the friction post 107 during the operation of the rotor assembly 103.

[0055] It should be noted that in this embodiment, the rotor assembly 103 further includes a permanent magnet 127. Installation grooves 129 are provided on both the first rotor core 109 and the second rotor core 125. The permanent magnet 127 can be installed in the installation grooves 129. Both the first rotor core 109 and the second rotor core 125 can participate in the electromagnetic action and can also cooperate to limit the position of the friction post 107. Since no substantial improvement has been made to the permanent magnet 127, the structure thereof will not be described in detail in this embodiment.

[0056] Please refer to again Figure 2 With Figure 3, in this embodiment, an elastic member is provided in the mating groove 111. The elastic member is configured to make the friction post 107 have a tendency to move into contact with the bearing ring 105, so that the friction post 107 can always stably contact the bearing ring 105. At the same time, during the specific use process, before assembly, grease can be applied to the friction post 107 first. After being assembled into the stator assembly 101, the sliding portion 113 of the friction post 107 contacts and mates with the bearing ring 105 on the inner ring of the stator assembly 101. When the sliding portion 113 of the friction post 107 is worn, through the adjustment of the elastic member, it can still ensure reliable and uniform contact with the bearing ring 105 on the inner ring of the stator assembly 101, thereby ensuring the reliability and stability of the operation of the bearing motor 10.

[0057] Specifically, please refer again to Figure 2 and Figure 3 , in this embodiment, the elastic member is a strip spring 121. The strip spring 121 is arranged between the bottom of the mating groove 111 and the friction post 107. Through the arrangement of the strip spring 121, when the sliding portion 113 of the friction post 107 is worn, by adjusting the strip spring 121, it can ensure the stable mating of the sliding portion 113 of the friction post 107 with the bearing ring 105.

[0058] Figure 8 is a schematic structural diagram of another rotor assembly 103 of the bearing motor 10 provided in this embodiment. Please refer to Figure 8 , in this embodiment, the elastic member is a tubular spring 123, such as a compression spring or a tension spring. The elastic member is sleeved outside the friction post 107, and one end of the elastic member is mated with the bottom of the mating groove 111, and the other end is mated with the friction post 107, so that when the sliding portion 113 of the friction post 107 is worn, by adjusting the tubular spring 123, it can ensure the stable mating of the sliding portion 113 of the friction post 107 with the bearing ring 105. Of course, in other embodiments, a leaf spring structure can also be used to ensure that the friction post 107 can stably contact the bearing ring 105. This embodiment does not make any limitations.

[0059] Figure 9 is a schematic structure of the stator assembly 101 of the bearing motor 10 provided in this embodiment Figure 1 ; Figure 10 is a schematic structure of the stator assembly 101 of the bearing motor 10 provided in this embodiment Figure 2 ; Figure 11 is a schematic structural diagram of the stator core 135 of the bearing motor 10 provided in this embodiment. Please refer to Figure 1 , Figure 9 , Figure 10 and Figure 11, in this embodiment, the stator assembly 101 includes a stator core 135 and a winding assembly 137. The winding assembly 137 includes a coil 139 and a stator skeleton 141. The coil 139 is wound around the stator skeleton 141, and the stator skeleton 141 is used to cooperate with the stator core 135. By setting it in this way, after the coil 139 is wound, it can be very easily and quickly placed into the stator core 135, thereby greatly improving the winding production speed, simplifying the winding production process, improving productivity, reducing the job threshold, and greatly reducing the failure rate.

[0060] Specifically, Figure 12 is a schematic structural diagram of the skeleton 143 around which the coil 139 is wound in the bearing motor 10 provided in this embodiment; Figure 13 is a schematic structural diagram of the skeleton 143 of the bearing motor 10 provided in this embodiment. Please refer to Figures 10 to 13 , in this embodiment, a plurality of convex portions 145 are provided on the inner edge of the stator core 135. Correspondingly, the stator skeleton 141 includes a plurality of skeletons 143 provided in one-to-one correspondence with the plurality of convex portions 145. Each skeleton 143 is inserted and cooperated with the corresponding convex portion 145 in one-to-one correspondence, and the plurality of skeletons 143 are sequentially connected end to end. A coil 139 is wound around the outside of each skeleton 143. By dividing the stator skeleton 141 into a plurality of skeletons 143, each skeleton 143 can complete winding independently, so as to facilitate quick assembly with the convex portion 145 at the corresponding position, making the assembly process of the stator core 135 and the winding assembly 137 simpler and more convenient, and reducing the failure rate.

[0061] Specifically, please refer to again Figure 13 , in this implementation, each skeleton 143 includes a main body 147, a first frame body 149, and a second frame body 151. The first frame body 149, the main body 147, and the second frame body 151 can be integrally formed. The main body 147 is used to be assembled with the convex portion 145 at the corresponding position. The first frame body 149 and the second frame body 151 are respectively arranged at both ends of the main body 147, and both are arc-shaped and concentrically arranged. The first frame bodies 149 of the plurality of skeletons 143 are sequentially connected end to end to form the inner ring of the stator assembly 101 to cooperate with the bearing ring 105, and the second frame bodies 151 of the plurality of skeletons 143 are sequentially connected end to end to form the outer ring of the stator assembly 101. By setting it in this way, after the plurality of skeletons 143 are sequentially connected end to end, a winding assembly 137 can be formed, which is convenient for cooperating with the stator core 135, thereby ensuring the compactness and stability of the entire bearing motor 10 and reducing its failure rate.

[0062] Next, the installation process, working principle, and beneficial effects of the bearing motor 10 provided in the embodiments of the present invention will be introduced in detail:

[0063] When assembling the above-mentioned bearing motor 10, first assemble the rotor assembly 103 and the stator assembly 101 separately, and then assemble the two together; among them, when assembling the rotor assembly 103, the strip spring 121 can be first placed in the fitting groove 111 of the first rotor core 109, and then the friction posts 107 are placed in each fitting groove 111, so that the lower end of the friction post 107 is inserted and matched with the fitting groove 111, and the protrusion 117 on the friction post 107 is inserted and matched with the groove 115 opened on the fitting groove 111, so that the sliding part 113 of the friction post 107 extends out of the fitting groove 111. Then, the first fitting part 131 and the second fitting part 133 of the second rotor core 125 are fitted on both sides of the first rotor core 109 to close the axial ends of the first rotor core 109; when assembling the stator assembly 101, the coil 139 can be first wound around the outside of the skeleton 143, and then a plurality of skeletons 143 are arranged on the protruding part 145 of the stator core 135 and connected end to end in sequence.

[0064] When the above-mentioned bearing motor 10 is running, the rotor assembly 103 can be directly driven to rotate relative to the stator assembly 101. During this process, since the bearing motor 10 can directly transmit power to the rotor assembly 103 to drive the rotor assembly 103 to rotate, the use of multiple parts for power transmission is saved, the cost can be saved, and the transmission accuracy can be guaranteed; at the same time, since the rotor assembly 103 is directly matched with the bearing ring 105 through the friction posts 107, it can also replace small bearings with short service lives, effectively improving the reliability and service life of the rotor assembly 103, and having lower requirements for machining accuracy, thereby effectively ensuring the stability and service life of the entire bearing motor 10.

[0065] In summary, the embodiment of the present invention provides a bearing motor 10 with low cost, high reliability, high stability, high precision, and long service life.

[0066] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bearing motor, characterized in that, it includes: a stator assembly, a bearing ring is arranged on the inner ring of the stator assembly; a rotor assembly, the circumferential edge of the rotor assembly is in sliding fit with the bearing ring through a plurality of friction posts arranged at intervals to rotate relative to the stator assembly; the rotor assembly includes a first rotor core, a plurality of fitting grooves corresponding to the plurality of friction posts are formed on the first rotor core, each friction post is in plug-in fit with the fitting groove at the corresponding position; and each friction post has a sliding portion extending from the fitting groove, and the sliding portion is used for sliding fit with the bearing ring; a groove is formed on one of each fitting groove and the friction post at the corresponding position, and a protrusion is arranged on the other of each fitting groove and the friction post at the corresponding position, and the protrusion is in plug-in fit with the groove; an elastic member is arranged in the fitting groove, and the elastic member is configured to make the friction post have a tendency of moving into contact with the bearing ring.

2. The bearing motor according to claim 1, characterized in that: the groove is formed on the groove wall of the fitting groove, and the protrusion is correspondingly arranged on the side wall of the friction post.

3. The bearing motor according to claim 2, characterized in that: the number of the grooves is two, and the two grooves are respectively formed on the two opposite groove walls of the fitting groove, and each groove communicates with the fitting groove; two protrusions are arranged on each friction post, and the two protrusions respectively protrude from both sides of the friction post to be in plug-in fit with the two grooves at the corresponding positions one by one.

4. The bearing motor according to claim 1, characterized in that: the elastic member is a strip spring, and the strip spring is arranged between the bottom of the fitting groove and the friction post; or, the elastic member is a tubular spring, the elastic member is sleeved outside the friction post, and one end of the elastic member is in fit with the bottom of the fitting groove, and the other end is in fit with the friction post.

5. The bearing motor according to claim 1, characterized in that: the rotor assembly further includes a second rotor core, the second rotor core is coaxially arranged with the first rotor core, and has a first fitting portion and a second fitting portion located at both ends of the first rotor core, and the first fitting portion and the second fitting portion are used to jointly limit the axial movement of the friction post.

6. The bearing motor according to any one of claims 1 to 5, characterized in that: the stator assembly includes a stator core and a winding assembly, the winding assembly includes a coil and a stator skeleton, the coil is wound on the stator skeleton, and the stator skeleton is used to cooperate with the stator core.

7. The bearing motor according to claim 6, characterized in that: a plurality of protrusion portions are arranged on the inner side edge of the stator core, the stator skeleton includes a plurality of the skeletons corresponding to the plurality of protrusion portions one by one, each skeleton is in plug-in fit with the protrusion portion at the corresponding position one by one, and the plurality of skeletons are connected end to end in sequence, and the coil is wound on the outside of each skeleton.

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