Annular motor, mill and positioning device for annular motor

Abstract

The utility model relates to an annular motor, which comprises a stator assembly with an annular structure, a rotor assembly with an annular structure and a plurality of positioning devices, the stator assembly is arranged outside the rotor assembly along the radial direction of the annular motor, and each positioning device comprises a positioning base, a rotor assembly and a rotor assembly, the positioning piece is arranged on the positioning base; wherein the positioning base is installed on a stator assembly of the annular motor, so that the positioning device can be at least switched between a working posture and a dismounting posture and / or a lifting posture, and in the working posture, the positioning piece is positioned in a guide groove in a rotor assembly of the annular motor; in the dismounting posture, the positioning device is dismounted from the annular motor; and in the lifting posture, the positioning piece is lifted from the guide groove. In addition, the utility model also relates to a mill and a positioning device for the annular motor.

Description

Technical Field

[0001] The utility model relates to a ring-shaped motor, a grinder and a positioning device for the ring-shaped motor. Background Art

[0002] When in use, a mill requires an electric motor to drive the mill barrel. A traditional mill drive system consists of a drive motor, a reduction gear, a pinion shaft, and a large gear. During operation, the drive motor drives the reduction gear, which in turn drives the pinion shaft, which in turn drives the large gear, which in turn drives the mill barrel to rotate and achieve grinding. This drive system involves numerous transmission links, each of which consumes energy, machinery, lubrication, and space. This results in low energy utilization and transmission efficiency for the entire drive system, significantly increasing energy, machinery, and lubrication consumption.

[0003] As an improvement, there is a ring motor that can directly drive the mill barrel to rotate. However, the stator and rotor of the existing ring motor are large in size and weight, which makes the assembly process inconvenient. In addition, due to the high requirements for the assembly accuracy of the ring motor, the centering needs to be repeatedly adjusted during the assembly process. Utility Model Content

[0004] In response to the above problems, according to a first aspect of the present invention, a ring-shaped motor is proposed, comprising a stator assembly in a ring structure, a rotor assembly in a ring structure, and a plurality of positioning devices, wherein the stator assembly is arranged outside the rotor assembly in a radial direction of the ring-shaped motor, and each positioning device comprises:

[0005] Positioning base; and

[0006] A positioning member arranged on the positioning base;

[0007] Wherein, the positioning base is mounted on the stator assembly of the annular motor, so that the positioning device can be transformed at least between a working posture and a disassembly posture and / or a lifting posture. In the working posture, the positioning member is positioned in a guide groove on the rotor assembly of the annular motor; in the disassembly posture, the positioning device is removed from the annular motor; in the lifting posture, the positioning member is lifted from the guide groove.

[0008] According to the present invention, the positioning device can be adjusted between multiple positions, allowing it to flexibly adopt a working position, a disassembly position, or an elevated position according to usage requirements. For example, during the assembly of the stator and rotor assemblies, the positioning device in its working position is connected to the stator assembly and acts on the rotor assembly, thereby ensuring accurate axial positioning between the stator and rotor assemblies. After the assembly process is completed, the positioning device can be removed as needed, placing it in the disassembly position; or it can be moved to an elevated position without affecting the normal operation of the rotor assembly due to friction with the guide groove.

[0009] According to one embodiment, the positioning base includes a positioning fixture mounted on the stator assembly, a positioning bracket for supporting the positioning member, and an elastic arm connected between the positioning fixture and the positioning bracket. This provides the positioning base with elastic deformation capabilities. In this case, even if the stator or rotor assembly has minor imperfections in roundness, or if the multiple positioning devices themselves are not precisely mounted along a circular path on the stator assembly, the positioning base can compensate for the roundness errors through its corresponding elastic deformation, thereby ensuring smooth assembly and reducing assembly difficulty.

[0010] According to one embodiment, the positioning and fixing portion includes at least one mounting point, and the positioning device is transformed between a working posture and a lifting posture by rotating the positioning and fixing portion around the mounting point.

[0011] Alternatively, the positioning and fixing portion includes a plurality of mounting points, wherein the plurality of mounting points are arranged rotationally symmetrically, and by means of the mounting points, the positioning and fixing portion can be mounted on the stator assembly at different angular positions, thereby enabling the positioning device to be transformed between a working posture and a lifting posture.

[0012] When space is limited, a single mounting point can be provided on the positioning fixture. By rotating the fixture slightly about this mounting point, the positioning device can be switched between the working and elevated positions. When the ring motor provides relatively large radial space, multiple mounting points can be provided, preferably arranged rotationally symmetrically. This allows the positioning device to be rotated through at least 180° using the existing mounting points, enabling the device to switch between the working and elevated positions while securely maintaining the position.

[0013] According to one embodiment, the positioning and fixing portion is detachably connected to the stator assembly by means of a threaded connection. Alternatively, a detachable connection method such as a snap-fit connection may also be considered.

[0014] According to one embodiment, the positioning and fixing portion includes a positioning portion recess that is recessed inward from a surface of the positioning and fixing portion, thereby achieving a lightweight design of the positioning device.

[0015] According to one embodiment, the positioning member is configured as a positioning wheel. Accordingly, the positioning bracket includes a rotation axis extending axially along the ring motor, wherein the positioning wheel is rotatable about the rotation axis. This provides the positioning device with greater freedom of movement, making it adaptable to diverse assembly processes and simplifying assembly.

[0016] Alternatively, the positioning element can also be configured as a non-rotatable positioning pin.

[0017] According to one embodiment, the elastic arm is curved, with one end connected to the positioning fixture and the other end connected to the positioning bracket. This allows the elastic arm to elastically deform in the radial direction of the ring motor when the positioning member is subjected to an external force. This effectively compensates for roundness errors between the stator and rotor assemblies, simplifying the assembly process.

[0018] According to one embodiment, the elastic arm is constructed in a C-shaped manner. In this embodiment, the positioning base is deformable by a simple shape design. As an alternative, the elastic arm can also be constructed in a shape different from the C-shaped shape, for example, with an S-shaped shape.

[0019] According to one embodiment, the rotor assembly extends beyond an end face of the stator assembly in the axial direction of the ring-shaped electric machine.

[0020] According to one embodiment, a plurality of positioning devices are arranged on the stator assembly at uniform angular distances along the circumference of the ring motor, thereby achieving uniform force distribution along the circumference during assembly through the plurality of positioning devices.

[0021] According to one embodiment, the positioning base of the positioning device is detachably fixed to the end surface of the stator assembly.

[0022] According to one embodiment, a guide groove is provided on the radial outer surface of the rotor assembly facing the stator assembly, wherein the positioning member of the positioning device can be guided along the guide groove. This arrangement maximizes the use of existing space conditions and forms a compact structure.

[0023] According to one embodiment, the width of the guide groove is consistent with the axial dimension of the positioning member of the ring motor. The matching of the axial dimensions of the guide groove and the positioning member ensures accurate axial positioning between the stator assembly and the rotor assembly.

[0024] According to a second aspect of the present invention, a grinding mill is provided, which includes a grinding mill cylinder and the above-mentioned ring motor.

[0025] According to a third aspect of the present invention, a positioning device for a ring motor is proposed, which includes an elastic positioning base and a positioning member arranged on the positioning base.

[0026] According to one embodiment, the positioning base includes a positioning fixing portion, a positioning bracket for supporting the positioning member, and an elastic arm connected between the positioning fixing portion and the positioning bracket.

[0027] According to one embodiment, the elastic arm is curved, wherein one end of the elastic arm is connected to the positioning fixing portion and the other end is connected to the positioning bracket, so that the elastic arm can be elastically deformed when the positioning member is subjected to external force.

[0028] According to one embodiment, the spring arms are C-shaped.

[0029] According to one embodiment, the positioning element is configured as a positioning wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings of the embodiments of the present invention. The drawings are only used to illustrate some embodiments of the present invention, and are not intended to limit all embodiments of the present invention to these drawings.

[0031] Figure 1 A perspective view schematically shows a ring motor according to the present invention;

[0032] Figure 2 A partial side view schematically shows a stator assembly of a ring motor according to the present invention together with a positioning device arranged thereon;

[0033] Figure 3 Schematically shows a partial enlarged view of a stator assembly according to the present utility model;

[0034] Figure 4 A schematic diagram schematically shows a stator core installation structure according to a preferred embodiment of the present utility model;

[0035] Figure 5A and Figure 5B Schematically shows a first shield and a second shield of a ring motor according to a preferred embodiment of the present utility model;

[0036] Figure 6 A partial perspective view schematically shows a rotor assembly of a ring-shaped motor according to the present invention;

[0037] Figure 7 Schematically shown Figure 6 A partial perspective view of the rotor assembly from another angle;

[0038] Figure 8 Schematically shown Figure 6 a side view of the rotor assembly shown;

[0039] Figure 9 Schematically shown Figure 6 a partial side view of the rotor assembly shown;

[0040] Figure 10 A partial perspective view schematically shows a rotor mounting portion according to the present invention;

[0041] Figure 11 A partial perspective view schematically shows a ring motor according to the present invention; and

[0042] Figure 12 The figure schematically shows a mill according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar terms used in the specification and claims of the present utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0045] The present invention will be described in detail below by describing exemplary embodiments.

[0046] Figure 1A perspective view of a ring motor 100 according to the present invention is schematically shown, which may be configured as a ring permanent magnet motor.

[0047] like Figure 1 As shown, the ring motor 100 includes a stator assembly 2 in an annular structure and a rotor assembly 3 in an annular structure, wherein the stator assembly 2 is arranged radially outside the rotor assembly 3 .

[0048] like Figures 2 to 4 As shown, the stator assembly 2 includes a stator housing having an annular configuration and having an inner circumferential surface 20, an outer circumferential surface 22, and two end surfaces 21 connected to the inner circumferential surface 20 and the outer circumferential surface 22. The inner circumferential surface 20, the outer circumferential surface 22, and the two end surfaces 21 collectively define an inner cavity of the stator housing. Furthermore, a reinforcement plate may be provided within the inner cavity of the stator housing to provide support for the stator housing. The reinforcement plate may have any suitable structure and form, as long as it provides structural support for the stator housing in an appropriate orientation. As needed, the reinforcement plate may be fixedly connected to various surfaces of the stator housing (e.g., by welding).

[0049] Especially Figure 3 As shown in the example, the reinforcement plate may include a first circumferential reinforcement plate 26 and a second circumferential reinforcement plate 27, located between the outer circumferential surface 22 and the inner circumferential surface 20 and extending circumferentially. Both of these plates provide strong radial support for the stator housing. The stator housing may also include a closing plate 24, disposed between the first circumferential reinforcement plate 26 and the second circumferential reinforcement plate 27 and spaced apart from the inner circumferential surface 20. The closing plate 24 has an arcuate shape extending circumferentially, so that the first circumferential reinforcement plate 26, the second circumferential reinforcement plate 27, the inner circumferential surface 20, and the closing plate 24 form a cooling channel 28. Thus, by forming the cooling channel 28 using a portion of the first circumferential reinforcement plate 26 and the second circumferential reinforcement plate 27, which are used to provide support for the stator housing, the structure of the cooling channel 28 is simplified, making installation more convenient.

[0050] The stator assembly 2 also includes a stator core 23, which is secured to the inner circumferential surface 20 by a securing member 29 extending through the inner circumferential surface 20. The stator core 23 may be integrally formed from a suitable magnetic material, or may be formed by stacking stator laminations, as described below. It should be understood that the securing member may be any suitable device or apparatus that secures the stator core 23 to the inner circumferential surface 20 on the side opposite the stator housing.

[0051] Any suitable coolant, such as water or oil, can flow through cooling channel 28. Because cooling channel 28 is located adjacent to and directly opposite stator core 23, heat from stator core 22 is directly transferred to the coolant within cooling channel 28 via inner circumferential surface 20, thereby achieving optimal cooling of stator core 23. Furthermore, cooling channel 28 can be formed in any suitable manner. According to a simple preferred embodiment, the cooling channel can be formed by welding C-shaped steel to inner circumferential surface 20.

[0052] Stator assembly 2 may further include at least one stator rib 25 disposed in cooling channel 28 for guiding coolant flow. The at least one stator rib 25 divides cooling channel 28 into a plurality of sub-channels. Preferably, the coolant flow directions in adjacent sub-channels are opposite, i.e., the fluid in the sub-channels flows along a serpentine path. Stator rib 25 may be secured to cooling channel 28, for example, by welding.

[0053] By arranging the stator ribs 25 in the cooling channel 28, not only can sufficient structural support be provided for the cooling channel 28, but also because the coolant flow directions in adjacent sub-channels are opposite, the coolant can flow through the inner circumferential surface 20 along a winding path, greatly improving the cooling efficiency and increasing the cooling effect.

[0054] According to a preferred embodiment, as viewed from the opposite axial direction of the ring motor Figure 5A and 5B As shown, the annular motor may further include a first shield 71 and a second shield 72, respectively disposed on the outside of the two end surfaces 21, to at least partially cover the stator assembly 2 and rotor assembly 3 of the annular motor. It should be understood that when the stator housing is composed of multiple sub-housing segments, the first shield 71 and the second shield 72 can also be configured in a segmented form for each sub-housing; or a single annular shield can be provided for all sub-housings. Furthermore, a gap space is formed by the stator assembly 2, the rotor assembly 3, the first shield 71, and the second shield 72. A fan 9 can be provided on the outer peripheral surface 22 to blow cooling air into the inner cavity formed by the stator housing, and the inner peripheral surface 20 also includes exhaust holes to connect the inner cavity with the gap space.

[0055] like Figures 6 to 10 As shown, the rotor assembly 3 is arranged inside the stator assembly 2 in the radial direction of the ring-shaped motor 100 and extends axially beyond the end surface 21 of the stator assembly 2. The rotor assembly 3 includes a rotor mounting portion 30 and a plurality of mounting ribs 35.

[0056] The rotor mounting portion 30 may be annular, such as Figure 10As shown, it includes a radial outer surface 31 of annular structure facing the stator assembly 2 and a radial inner surface 32 opposite thereto. The rotor core 36 and the magnetic shoe 361 mounted on the rotor core 36 are arranged on the radial outer surface 31. The rotor mounting portion 30 includes an intermediate mounting section 33 arranged on the radial inner surface 32, and the intermediate mounting section 33 extends perpendicularly to the radial outer surface 31 and the radial inner surface 32, so that the cross section of the rotor mounting portion 30 is T-shaped. Preferably, the intermediate mounting section 33 is provided with a plurality of axial through holes spaced apart from each other in the axial direction. Fasteners such as bolts can pass through the axial through holes to fix the driven member (such as the mill cylinder described later) to the intermediate mounting section 33 of the rotor mounting portion 30.

[0057] Therefore, the rotor mounting portion 30 is used not only to mount the rotor core but also to mount the driven component. It should be understood that the rotor mounting portion 30 may also have other structures and forms according to the specific structure and requirements of the driven component.

[0058] A plurality of axially extending mounting strip grooves 34 are provided on the radial outer surface 31 and spaced apart from each other in the circumferential direction. Each of the plurality of mounting ribs 35 includes a first rib portion received in the mounting strip groove 34 and a second rib portion received in the core strip groove 37 on the radial inner surface of the rotor core 36. Furthermore, both the mounting strip groove 34 and the core strip groove 37 have stoppers that restrict radial movement of the mounting rib 35, thereby limiting radial movement of the rotor core 36 and ensuring more stable operation of the ring-shaped motor. To this end, the mounting ribs 35 are preferably ribs with an I-shaped cross-section.

[0059] Furthermore, due to the large size of the ring motor's rotor assembly, the magnetic attraction between it and the stator is also extremely strong during installation, making installation very difficult and potentially posing a safety hazard. Therefore, the rotor core 36 can be slid to its mounting position on the rotor mounting portion 30 by means of the sliding movement of the mounting ribs 35, enabling convenient and efficient sliding assembly.

[0060] Preferably, if Figures 7 to 9 As shown, multiple mounting ribs 35 are used as one of the mounting members for mounting the rotor core 36 to the rotor mounting portion 30. The mounting ribs 35 are fixedly connected to the rotor core 36. Furthermore, the relevant structure is configured such that during assembly of the rotor assembly, the multiple rotor cores 36 can be moved to their installed positions on the rotor mounting portion 30 by means of the mounting ribs 35 sliding within the mounting portion strip slots 34. A specific method for achieving the fixed connection between the mounting ribs 35 and the rotor core 36 is to have a second rib portion received in and fixed relative to the core strip slots 37. However, in embodiments not shown, the mounting ribs 35 and the rotor core 36 may be fixed in other ways.

[0061] In order to hold the ring motor 100, a support base assembly 5 is provided, wherein the support base assembly 5 comprises two support bases 50 respectively arranged on both sides of the stator assembly 2 and the rotor assembly 3, and a support base crossbeam 51 connected between the two support bases 50. In order to improve the support stability, the support base 50 can be as follows Figure 1 As shown, a base plate 501 is provided at its lower portion. Depending on the application, the base plate 501 of the support base 50 can be directly fixed to the ground or to other equipment using fixings (not shown), such as screws or anchor bolts. The support base assembly 5 also includes a support diagonal beam 52, which is arranged at the top of each support base 50. One end of the support diagonal beam is fixedly connected to the support base 50, and the other end is fixedly connected to the outer peripheral surface 22 of the stator assembly 2.

[0062] The various components of the support base assembly 5, such as Figure 1 The support base 50 and its base plate 501 , support base cross beam 51 and support oblique beam 52 shown can be constructed in a separate manner and fixedly connected to each other, or can be constructed in an integral manner, for example, by casting.

[0063] Thus, the ring motor 100 is fixed above the ground by means of the support base assembly 5 , wherein the support base assembly 5 is fixedly connected to the stator assembly 2 of the ring motor 100 without affecting the rotational operation of the rotor assembly 3 thereof.

[0064] To ensure the rotational stability of the rotor assembly 3 during operation of the ring motor 100, a rotor support device (not specifically shown in the figure) is also configured for the rotor assembly 3. The rotor assembly 3 is rotatably supported on the rotor support device, and the rotor support device is fixed relative to the stator assembly 2 and the support base assembly 5.

[0065] The stator assembly 2 and the rotor assembly 3 should maintain a stable position relative to each other in the axial direction. Therefore, the stator assembly 2 and the rotor assembly 3 need to be accurately positioned in the axial direction during the assembly process. To this end, the ring motor 100 is provided with a plurality of positioning devices 4. Figure 1 As shown, for example, a total of 16 positioning devices 4 are provided, wherein the positioning devices 4 are arranged on the stator component 2 at uniform angular distances along the circumference of the ring motor 100 .

[0066] Each positioning device 4 includes a positioning base 41 and a positioning member 42. Figure 2As shown, the custom base 41 includes a positioning and fixing portion 410, a positioning bracket 411, and an elastic arm 412. To achieve a lightweight design, the positioning and fixing portion 410 may not be solid, but may instead have a centrally positioned positioning recess 410a. Furthermore, the positioning and fixing portion 410 includes at least one mounting point 410b, which secures the positioning base 41 to the end surface 21 of the stator assembly 2. Mounting point 410b may be configured as a threaded hole through which a corresponding bolt passes, thereby achieving a removable connection of the positioning base 41 to the stator assembly 2.

[0067] For example, Figure 2 In the embodiment shown, the positioning portion cavity 410a surrounding the positioning fixing portion 410 is provided with mounting points 410b at the four corners of the positioning fixing portion 410, i.e., a total of four mounting points 410b. These four mounting points 410b can be arranged rotationally symmetrically, so that the entire positioning device 4 can be rotated relative to the positioning device 4 without adding mounting points or changing the positions of the mounting points. Figure 2 Turn the angular position of 180 ° and install. As an alternative, only one, two, three or more installation points can be set.

[0068] In this embodiment, the positioning member 42 is configured as a positioning wheel. Accordingly, the positioning bracket 411 includes a rotating shaft 411a extending along the axial direction of the ring motor 100. The positioning member 42 configured as a positioning wheel is supported on the positioning bracket 411 and can rotate around the rotating shaft 411a.

[0069] However, in an embodiment not shown, the positioning member 42 may also be configured in other forms, such as a positioning pin.

[0070] The elastic arm 412 is constructed in a curved manner and extends between the positioning and fixing portion 410 and the positioning bracket 411, wherein one end of the elastic arm 412 is connected to the lower side of the positioning and fixing portion 410 and the other end is connected to the upper side of the positioning bracket 411. The elastic arm 412 can be manufactured integrally with the positioning and fixing portion 410 and the positioning bracket 411 using the same material, wherein the elastic arm 412 itself is constructed in a C-shape, thereby having better elastic deformation performance through this shape. Of course, the elastic arm 412 can also have other shapes, such as an S-shape. During the assembly process of the stator assembly 2 and the rotor assembly 3, when the positioning member 42 is subjected to an external force, the elastic arm 412 is squeezed and has a deformation component in the radial direction of the ring motor 100. Through this radial elastic deformability, the roundness error between the stator assembly 2 and the rotor assembly 3 is effectively compensated, greatly simplifying the assembly process.

[0071] As mentioned above, the stator assembly 2 and the rotor assembly 3 should be accurately positioned along the axial direction of the ring motor 100. Figure 3As shown, a guide groove 38 is provided on the radial outer surface 31 of the rotor assembly 3 in an area axially extending beyond the end surface 21 of the stator assembly 2. The width of the guide groove 38 corresponds to the axial dimension of the positioning member 42 along the ring motor 100, thereby providing relatively high positioning accuracy. For example, if the positioning member 42 is configured as a positioning wheel, the width of the guide groove 38 corresponds to the width of the positioning wheel. The guide groove 38 can extend along the entire circumference of the radial outer surface 31 of the rotor assembly 3, thereby forming a complete annular guide groove. Alternatively, the guide groove 38 can extend only in sections, that is, multiple guide grooves 38 can be formed in sections on the radial outer surface 31 of the rotor assembly 3. However, when multiple guide grooves 38 are configured, the guide grooves 38 and the virtual connecting lines between the guide grooves 38 still form a complete annular trajectory, thereby ensuring accurate axial positioning of the stator assembly 2 and the rotor assembly 3.

[0072] The positioning device 4 can be changed at least between a working posture and a disassembly posture and / or a lifting posture. Figure 1 、 Figure 2 and Figure 4 In the illustrated working position, the positioning device 4 is fixedly connected to the end surface 21 of the stator assembly 2 by its positioning and fixing portion 410, wherein the positioning base 41 is arranged close to the rotor assembly 3 so that the positioning member 42 of the positioning device 4 can be inserted into the guide groove 38 of the rotor assembly 3. As a result, the rotor assembly 3 can rotate circumferentially relative to the stator assembly 2, but maintain a relatively fixed relative position in the axial direction of the ring motor 100. During the assembly process, if the gap between the stator assembly 2 and / or the rotor assembly 3 is uneven due to roundness defects, an external force will act on the positioning member 42, which will transmit this force to the elastic arm 412, resulting in an elastic deformation component of the elastic arm 412 in the radial direction of the ring motor 100, thereby compensating for the roundness error and ensuring that the assembly operation can continue.

[0073] When the stator assembly 2 and the rotor assembly 3 are assembled, the positioning device 4 can be transferred to its removal posture by removing the connection at the fixing point 410 b of the positioning fixing portion 410 , thereby removing the positioning device 4 from the ring motor 100 .

[0074] Alternatively, after the stator assembly 2 and the rotor assembly 3 are assembled, the positioning device 4 can be moved to its raised position. For example, if only one fixing point 410b is provided, the connection at the fixing point 410b can be first loosened, and then the positioning base 41 can be rotated about the fixing point 410b to lift the positioning member 42 from the guide slot 38. Finally, the fixing point 410b can be used to achieve a fixed connection between the positioning base 41 and the stator assembly 2. In the case where multiple fixing points 410b are provided, if these fixing points 410b are not arranged rotationally symmetrically, the connection at the fixing point 410b can also be first released, and then the positioning base 41 can be rotated around an angle to lift the positioning member 42 from the guide groove 38, and finally, the positioning base 41 can be re-fixed to the stator assembly 2 using at least one of the fixing points 410b. If these fixing points 410b are not arranged rotationally symmetrically, in particular, after the connection at the fixing point 410b is released, the positioning base 41 can be rotated 180°, and finally, the positioning base 41 can be re-fixed to the stator assembly 2 using the existing fixing points 410b. In the raised position, the positioning device 4 does not need to be completely removed from the ring motor 100, but can continue to be fixedly connected to the stator assembly 2, without affecting the normal operation of the rotor assembly 3 relative to the stator assembly 2.

[0075] As another aspect of the present invention, a grinding mill is also provided. Figure 12 The exemplary embodiment shown includes a mill barrel 300 and the aforementioned ring-shaped motor 100. The mill barrel 300 should be fixedly connected to the rotor assembly 3 and mounted radially inwardly of the rotor assembly 3. For example, the mill barrel 300 can be mounted on the middle mounting section 33 of the rotor mounting portion 30 by bolts. Although not shown, it should be understood that the mill barrel 300 can be supported at its axial ends by structures consisting of necessary bearings, brackets, etc., so that the mill barrel 300 and the rotor assembly 3 can rotate stably together.

[0076] Certain features, structures or characteristics in one or more embodiments of the present application may be appropriately combined.

[0077] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which this invention belongs. It should also be understood that terms such as those defined in common dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0078] The above is an illustration of the present invention and should not be considered as limiting thereof. Although several exemplary embodiments of the present invention have been described, those skilled in the art will readily appreciate that many modifications may be made to the exemplary embodiments without departing from the novel teachings and advantages of the present invention. Therefore, all such modifications are intended to be included within the scope of the present invention as defined by the claims. It should be understood that the above is an illustration of the present invention and the present invention should not be considered as limited to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the present invention.

Claims

1. A ring-shaped motor (100), comprising a stator assembly (2) in a ring-shaped configuration, a rotor assembly (3) in a ring-shaped configuration, and a plurality of positioning devices (4), wherein: The stator assembly (2) is arranged outside the rotor assembly (3) along the radial direction of the ring-shaped motor (100), and is characterized in that each positioning device (4) comprises: a positioning base (41); and a positioning member (42) arranged on the positioning base (41); The positioning base (41) is mounted on the stator assembly (2) of the ring-shaped motor (100), so that the positioning device (4) can be transformed at least between a working posture and a disassembly posture and / or a lifting posture. In the working posture, the positioning member (42) is positioned in a guide groove on the rotor assembly (3) of the ring-shaped motor (100); in the disassembly posture, the positioning device (4) is removed from the ring-shaped motor (100); and in the lifting posture, the positioning member (42) is lifted from the guide groove.

2. The ring motor (100) according to claim 1, characterized in that The positioning base (41) comprises a positioning fixing portion (410) mounted on the stator assembly (2), a positioning bracket (411) for supporting the positioning member, and an elastic arm (412) connected between the positioning fixing portion (410) and the positioning bracket (411).

3. The ring motor (100) according to claim 2, characterized in that The positioning fixing portion (410) includes at least one mounting point, and the positioning device (4) is transformed between a working posture and a lifting posture by rotating the positioning fixing portion (410) around the mounting point.

4. The ring motor (100) according to claim 2, characterized in that The positioning fixing portion (410) includes a plurality of mounting points, wherein the plurality of mounting points are arranged rotationally symmetrically. With the aid of the mounting points, the positioning fixing portion (410) can be mounted on the stator assembly (2) at different angular positions, thereby enabling the positioning device (4) to be transformed between a working posture and a lifting posture.

5. The ring motor (100) according to claim 2, characterized in that The positioning fixing portion (410) is detachably connected to the stator assembly (2) by means of a threaded connection.

6. The ring motor (100) according to claim 2, characterized in that The positioning and fixing portion (410) comprises a positioning portion recess (410a) recessed inwardly from a surface of the positioning and fixing portion.

7. The ring motor (100) according to claim 2, characterized in that The positioning element (42) is configured as a positioning wheel.

8. The ring motor (100) according to claim 7, characterized in that The positioning bracket (411) comprises a rotating shaft (411a) extending along the axial direction of the ring-shaped motor (100), wherein the positioning wheel is capable of rotating around the rotating shaft (411a).

9. The ring motor (100) according to claim 2, characterized in that The elastic arm (412) is constructed in a curved manner, wherein one end of the elastic arm (412) is connected to the positioning fixing portion (410), and the other end is connected to the positioning bracket (411), so that the elastic arm (412) can be elastically deformed along the radial direction of the ring motor (100) when the positioning member (42) is subjected to an external force.

10. The ring motor (100) according to claim 9, characterized in that The elastic arm (412) is designed in a C-shaped manner.

11. The ring motor (100) according to claim 1, characterized in that The rotor assembly (3) extends in the axial direction of the ring-shaped motor (100) beyond the end surface (21) of the stator assembly (2).

12. The ring motor (100) according to claim 1, characterized in that A plurality of positioning devices (4) are arranged on the stator assembly (2) at uniform angular distances along the circumference of the ring-shaped motor (100).

13. The ring motor (100) according to claim 11, characterized in that The positioning base (41) of the positioning device (4) is detachably fixed on the end surface (21) of the stator assembly (2).

14. The ring motor (100) according to claim 11, characterized in that A guide groove (38) is provided on a radial outer surface (31) of the rotor assembly (3) facing the stator assembly (2), wherein a positioning member (42) of the positioning device (4) can be guided along the guide groove (38).

15. The ring motor (100) according to claim 14, characterized in that The width of the guide groove (38) is consistent with the dimension of the positioning member (42) along the axial direction of the ring motor (100).

16. A grinding mill, characterized in that: The mill comprises a mill cylinder and a ring-shaped motor (100) according to any one of claims 1 to 15.

17. A positioning device (4) for a ring motor (100), characterized in that: The positioning device (4) comprises an elastically constructed positioning base (41) and a positioning member (42) arranged on the positioning base (41).

18. The positioning device (4) according to claim 17, characterized in that The positioning base (41) comprises a positioning fixing portion (410), a positioning bracket (411) for supporting the positioning member (42), and an elastic arm (412) connected between the positioning fixing portion (410) and the positioning bracket (411).

19. The positioning device (4) according to claim 18, characterized in that The elastic arm (412) is constructed in a curved manner, wherein one end of the elastic arm (412) is connected to the positioning fixing portion (410), and the other end is connected to the positioning bracket (411), so that the elastic arm (412) can be elastically deformed when the positioning member is subjected to an external force.

20. The positioning device (4) according to claim 19, characterized in that The elastic arm (412) is designed in a C-shaped manner.

21. The positioning device (4) according to claim 17, characterized in that The positioning element (42) is configured as a positioning wheel.

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