Disc type motor structure
By employing a combination of fixed and floating bearings in a disc motor, the bearing positions within the housing are optimized, solving the problem of unoptimized installation space in existing bearing configurations and achieving a reduction in axial dimensions and improved performance.
Patent Information
- Application Number
- CN202422548901.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-10-21
AI Technical Summary
In existing disc motors, the bearing arrangement fails to effectively optimize the installation space inside the housing, resulting in the inability to further reduce the axial dimension.
The first bearing is fixed in the axial direction and the second bearing floats in the axial direction. The fixing and floating of the bearings are achieved through a limiting structure, which optimizes the position of the bearings in the housing and reduces the axial length.
By effectively utilizing the internal space of the housing and optimizing the installation space, the axial dimension of the disc motor structure has been reduced, improving installation and usage performance.
Smart Images
Figure CN223613140U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motor technical field, especially a disc type motor structure. BACKGROUND
[0002] The disc type motor is also called the disc type motor, has the characteristics of small volume, light weight, high efficiency. The disc type motor is characterized by small size in the axial direction, which can be applied to scenes with limited axial installation space. In the prior art, the setting mode of the pair of bearings in the disc type motor for supporting the rotating shaft cannot optimize the installation space inside the shell well, resulting in that the axial size of the disc type motor cannot be further reduced. Therefore, it is necessary to improve the prior art to overcome the defects in the prior art. SUMMARY
[0003] The utility model discloses a disc type motor structure with smaller axial size.
[0004] The utility model discloses a disc type motor structure with smaller axial size.
[0005] A disc type motor structure, comprising: a shell comprising a first shell part and a second shell part; a stator assembly fixedly arranged in the shell; a rotor assembly comprising a rotor disc corresponding to the stator assembly and a rotating shaft mechanically connected to the rotor disc; a first bearing and a second bearing sleeved on the rotating shaft, the rotating shaft being supported by the shell through the first bearing and the second bearing, and the first shell part being provided with a first through hole for the rotating shaft to extend to the outside of the shell.
[0006] Preferably, the first bearing is fixed in the axial direction, and the second bearing is arranged in the axial direction in a floating manner, and the first bearing is distributed close to the main output end of the rotating shaft.
[0007] Preferably, the axial length of the first bearing is L1, the axial length of the second bearing is L2, and the axial length between the first bearing and the second bearing is L3; the stator assembly and the rotor disc distributed adjacent in the axial direction form a stator-rotor region in the axial direction, and the length of the stator-rotor region in the axial direction is L4, and L1+L2+L3≤L4.
[0008] Preferably, the first bearing and the second bearing are located in the stator-rotor region; or,
[0009] The second bearing is located in the stator-rotor region, and the first bearing is partially located in the stator-rotor region and partially axially exceeds the stator-rotor region, wherein the length of the part of the first bearing exceeding the stator-rotor region in the axial direction is in the range of 0.5mm to 1.5mm.
[0010] Preferably, the number of rotor discs is two, and the two rotor discs are symmetrically distributed on opposite sides of the stator assembly to form a single-stator double-rotor distribution form.
[0011] Preferably, the inner wall of the first shell portion is recessed in the axial direction to form a first bearing chamber, and the first bearing is accommodated in the first bearing chamber; the inner wall of the second shell portion is recessed in the axial direction to form a second bearing chamber, and the second bearing is accommodated in the second bearing chamber.
[0012] The first bearing chamber is further provided with a first nest, and the first nest is nested on the outer periphery of the first bearing; the second bearing chamber is further provided with a second nest, and the second nest is nested on the outer periphery of the second bearing.
[0013] Preferably, the first bearing is fixed in the axial direction by a first limiting structure.
[0014] The first limiting structure includes the first bearing chamber, a bearing pressing plate cooperating with the first bearing chamber to limit the first bearing in the first bearing chamber, a first shaft shoulder provided on the rotating shaft, and a clamping groove provided with a clamping spring.
[0015] The first shaft shoulder and the clamping spring are configured to limit the inner ring of the first bearing in the axial direction, and the first bearing chamber and the bearing pressing plate are configured to limit the outer ring of the first bearing in the axial direction.
[0016] Preferably, the second bearing is arranged to be floating in the axial direction by a second limiting structure.
[0017] The second limiting structure includes the second bearing chamber, an elastic member provided in the second bearing chamber, and a second shaft shoulder formed on the rotating shaft, wherein one end of the second bearing abuts against the elastic member, and the other end abuts against the second shaft shoulder.
[0018] Preferably, the rotating shaft includes a central shaft portion, an outer ring portion annularly arranged on the outer periphery of the central shaft portion, and a connecting portion connecting the central shaft portion and the outer ring portion, wherein the first bearing and the second bearing are nested on the central shaft portion and located on opposite sides of the connecting portion, and the rotor disc is arranged on the outer ring portion and vertically distributed with the central shaft portion.
[0019] The connecting portion divides the internal space of the outer ring portion into a first recess cavity and a second recess cavity in the axial direction, and the first bearing is at least partially located in the first recess cavity, and the second bearing is at least partially located in the second recess cavity.
[0020] Preferably, the end side of the central shaft portion close to the second bearing is further provided with a secondary output end, and the secondary output end is in driving connection with a pump.
[0021] Preferably, the first bearing is a double-row angular contact bearing, and the second bearing is a deep groove ball bearing.
[0022] Compared with the prior art, the disc motor structure has the beneficial effects that: by limiting the distribution mode of the first bearing and the second bearing, the internal installation space of the disc motor structure is optimized, so that the axial size of the disc motor structure is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 is a perspective structural schematic view of the disc motor structure provided by the utility model.
[0024] Figure 2 is a cross-sectional structural schematic view of the disc motor structure provided by the utility model.
[0025] Figure 3 is a schematic view of the axial length of the first bearing, the axial length of the second bearing, the axial length between the first bearing and the second bearing, and the length of the stator-rotor region in the axial direction.
[0026] Figure 4 is a schematic view of the positional relationship among the rotating shaft, the first bearing and the second bearing.
[0027] Figure 5 is a cross-sectional structural schematic view of Figure 4 .
[0028] Figure 6 is a cross-sectional structural schematic view of the first shell part.
[0029] Figure 7 is a cross-sectional structural schematic view of the second shell part. DETAILED DESCRIPTION
[0030] In order to make the above objectives, features and advantages of the present application more apparent and understandable, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0031] The terms "comprising" and "having" and any variations thereof herein are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a list of steps or units is not necessarily limited to the listed steps or units, but can optionally further include additional steps or units not listed, or can optionally further include other steps or units inherent to such process, method, product, or apparatus.
[0032] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated in to other embodiments.
[0033] The utility model provides a kind of disc motor structure, as shown in Figures 1 to 5 The disc motor structure includes a housing 100, a stator assembly 200, a rotor assembly 300, and the stator assembly 200 and the rotor assembly 300 are arranged in the housing 100. In order to facilitate the installation of the stator assembly 200 and the rotor assembly 300 in the housing 100, the housing 100 is split.
[0034] Specifically, the housing 100 is split in the axial direction of the rotor assembly 300, including a first housing part 110 and a second housing part 120 that cooperate. The "cooperation" means that the first housing part 110 and the second housing part 120 can be detachably installed together through mechanical connection. The detachable installation methods include bolts, buckles, etc. When installing, first arrange the stator assembly 200 and the rotor assembly 300 on one of the first housing part 110 and the second housing part 120, and then assemble the other one, which has the advantage of convenient installation. It is worth noting that the first housing part 110 and the second housing part 120 can also be split in the radial direction. The split method can be determined according to the actual use environment.
[0035] As shown in Figure 2 and Figure 3 The stator assembly 200 is fixedly arranged in the housing 100. The rotor assembly 300 includes a rotor disc 310 corresponding to the stator assembly 200 and a rotating shaft 320 mechanically connected to the rotor disc 310. The mechanical connection can be bolted connection, welding, or other types of mechanical fixation. It is worth noting that the "axial direction" in this specification refers to the axial direction of the rotor assembly 300, which can also be understood as the axial direction of the rotating shaft 320.
[0036] In an embodiment, the number of rotor disks 310 is two, and the two rotor disks 310 are symmetrically distributed on opposite sides of the stator assembly 200, forming a single-stator double-rotor distribution form. Of course, the disk motor structure is not limited to the single-stator double-rotor form, but can also be in the form of a single-rotor double-stator or a single-rotor single-stator.
[0037] As shown in Figure 6 The first shell part 110 is provided with a first through hole 112 for the extension of the rotating shaft 320 to the outside of the shell 100. The part of the rotating shaft 320 extending to the outside of the first shell part 110 is the main output end of the rotating shaft 320, which is used to connect with an external load (not shown in the figure) to provide rotary drive. The main output end 327 is provided with a spline for connection with the external load. An oil seal 900 is arranged between the main output end 327 and the first through hole 112.
[0038] The rotor assembly 300 rotates relative to the stator assembly 200 and the shell 100 during operation. In order to realize the rotary motion of the rotor assembly 300, the rotating shaft 320 is supported on the shell 100 by at least the first bearing 400 and the second bearing 500, wherein the first bearing 400 and the second bearing 500 are respectively sleeved on the rotating shaft 320.
[0039] Considering that the axial size of the disk motor structure is mainly affected by the distribution mode of the first bearing 400 and the second bearing 500, the distribution mode of the first bearing 400 and the second bearing 500 is optimized in the embodiment to reduce the axial size of the disk motor structure as much as possible.
[0040] In the embodiment, the first bearing 400 is fixed in the axial direction, and the second bearing 500 is arranged in the axial direction in a floating manner. Preferably, the first bearing 400 is a double-row angular contact bearing, and the second bearing 500 is a deep groove ball bearing. The above-mentioned distribution mode of the first bearing 400 and the second bearing 500 not only can effectively utilize the internal space of the shell 100, optimize the installation space inside the shell 100, and reduce the axial length, but also can make the rotating shaft 320 have a floating space in the axial direction, and has good installation and use performance.
[0041] Specifically, the inner wall of the first shell part 110 is recessed in the axial direction to form a first bearing chamber 111, and the first bearing 400 is accommodated in the first bearing chamber 111. The inner wall of the second shell part 120 is recessed in the axial direction to form a second bearing chamber 121, and the second bearing 500 is accommodated in the second bearing chamber 121.
[0042] As shown in Figure 2 and Figure 6As shown, the first bearing chamber 111 is provided with a first nesting 420, which is sleeved on the outer periphery of the first bearing 400. Figure 2 and Figure 7 As shown, the second bearing chamber 121 is provided with a second nesting 520, which is sleeved on the outer periphery of the second bearing 500. The purpose of the first nesting 420 and the second nesting 520 is to make different types of bearings applicable. Different types of bearings can be installed in the bearing chamber through the nesting, and the versatility is better.
[0043] Regarding the limiting of the first bearing 400, since the first bearing 400 is fixed in the axial direction, both the inner ring and the outer ring of the first bearing 400 need to be limited to achieve the fixation of the first bearing 400 in the axial direction. In this embodiment, the first bearing 400 is fixed in the axial direction by the first limiting structure.
[0044] As shown, Figure 2 and Figure 5 The first limiting structure includes the first bearing chamber 111, a bearing pressing plate 410 cooperating with the first bearing chamber 111 to limit the first bearing 400 in the first bearing chamber 111, a first shaft shoulder 3211 and a clamping groove 3212 provided on the shaft 320, wherein the clamping groove 3212 is used for limiting the limit of the snap spring, and the inner ring of the snap spring is clamped in the clamping groove 3212.
[0045] The first shaft shoulder 3211 and the snap spring are used to limit the inner ring of the first bearing 400 in the axial direction, and the first bearing chamber 111 and the bearing pressing plate 410 are used to limit the outer ring of the first bearing 400 in the axial direction. After installation is completed, one end of the inner ring of the first bearing 400 abuts against the first shaft shoulder 3211, and the other end of the inner ring abuts against the snap spring. One end of the outer ring of the first bearing 400 abuts against the bearing pressing plate 410, and the other end of the outer ring abuts against the chamber wall of the first bearing chamber 111. Thus, the inner ring and the outer ring of the first bearing 400 are limited in the axial direction, thereby achieving the fixation of the first bearing 400 in the axial direction.
[0046] Regarding the limiting of the second bearing 500, the second bearing 500 is provided with the second limiting structure to achieve the floating setting in the axial direction. The second limiting structure includes the second bearing chamber 121, an elastic member 510 provided in the second bearing chamber 121, and a second shaft shoulder 3213 formed on the shaft 320, wherein one end of the second bearing 500 abuts against the elastic member 510, and the other end abuts against the second shaft shoulder 3213.
[0047] The elastic member 510 functions to provide floating amount for the second bearing 500 in the axial direction. The elastic member 510 is preferably a wave spring, but can also be a compression spring, a rubber spring, etc., as long as it can realize floating of the second bearing 500 in the axial direction.
[0048] As shown in Figs. 1 and 2, the shaft 320 comprises a central shaft portion 321, an outer ring portion 322 arranged around the outer periphery of the central shaft portion 321, and a connecting portion 323 connecting the central shaft portion 321 and the outer ring portion 322, wherein the central shaft portion 321 is internally hollow. Figure 4 Figure 5 As shown in Figs. 1 and 2, the shaft 320 comprises a central shaft portion 321, an outer ring portion 322 arranged around the outer periphery of the central shaft portion 321, and a connecting portion 323 connecting the central shaft portion 321 and the outer ring portion 322, wherein the central shaft portion 321 is internally hollow.
[0049] The connecting portion 323 is in the form of a plate, and the connecting portion 323 divides the internal space of the outer ring portion 322 into a first recessed cavity 324 and a second recessed cavity 325 in the axial direction, and the first bearing 400 is at least partially located in the first recessed cavity 324, and the second bearing 500 is at least partially located in the second recessed cavity 325. The distribution mode that the first bearing 400 partially overlaps the first recessed cavity 324 in the axial direction and the second bearing 500 partially overlaps the second recessed cavity 325 in the axial direction can effectively utilize the space in the axial direction, and reduce the length in the axial direction, thereby facilitating miniaturization of the axial dimension of the disc motor structure.
[0050] The bearing pressing plate 410 is located in the first recessed cavity 324, so that the bearing pressing plate 410 does not need to additionally occupy the dimension in the axial direction, and to some extent, helps to reduce the dimension of the disc motor structure in the axial direction. Further, the first bearing chamber 111 partially overlaps the first recessed cavity 324 in the axial direction, and the second bearing chamber 121 partially overlaps the second recessed cavity 325 in the axial direction, so that the axial dimension of the disc motor structure can be effectively reduced. In the present embodiment, the first recessed cavity 324 and the second recessed cavity 325 optimize the internal installation space of the disc motor structure, and can effectively reduce the axial dimension of the disc motor structure.
[0051] In the present embodiment, the central shaft portion 321 further comprises a secondary output end 326 located at the end side close to the second bearing 500, and the secondary output end 326 is in driving connection with the pump 600. The secondary output end 326 is used to transmit power to the pump 600, and the pump 600 is used to drive the cooling medium to flow inside and outside the disc motor structure, so as to realize heat dissipation and cooling of the stator assembly 200 and the rotor assembly 300.
[0052] As shown in Figure 3 , the axially adjacent distributed stator assembly 200 and the rotor disc 310 form a stator-rotor region in the axial direction, and the length of the stator-rotor region in the axial direction is L4. The axial length of the first bearing 400 is L1, the axial length of the second bearing 500 is L2, and the axial length between the first bearing 400 and the second bearing 500 is L3, wherein L1+L2+L3≤L4.
[0053] In order to meet L1+L2+L3≤L4, the first bearing 400 and the second bearing 500 are located in the stator-rotor region; or the second bearing 500 is located in the stator-rotor region, and the first bearing 400 is partially located in the stator-rotor region and partially axially exceeds the stator-rotor region, wherein the length of the part of the first bearing 400 exceeding the stator-rotor region in the axial direction is in the range of 0.5mm to 1.5mm.
[0054] That is, by limiting the axial size relationship between the first bearing 400, the second bearing 500, the stator assembly 200, and the rotor assembly 300, the positions of the first bearing 400 and the second bearing 500 in the housing 100 can be limited to a certain extent, the internal installation space of the disc motor structure is optimized, and the purpose of reducing the axial size of the disc motor structure is achieved.
[0055] As shown in Figure 3 , the center shaft part 321 is further provided with a rotary transformer 700, and the rotary transformer 700 includes a movable part 710 and a fixed part 720, and the fixed part 720 overlaps the movable part 710 in the axial direction. The movable part 710 is arranged on the center shaft part 321 and rotates synchronously with the center shaft part 321. The center shaft part 321 is provided with a third shaft shoulder 3214 matched with the movable part 710, and the third shaft shoulder 3214 is located in the second recess cavity 325 and between the second shaft shoulder 3213 and the connecting part 323. The center shaft part 321 is further provided with a compression ring 800 for limiting the axial position of the movable part 710, and the compression ring 800 is located between the second bearing 500 and the movable part 710, and the movable part 710 is clamped between the compression ring 800 and the third shaft shoulder 3214. During installation, the movable part 710 is sleeved on the center shaft part 321 and abuts against the third shaft shoulder 3214, and then the compression ring 800 is sleeved on the center shaft part 321 and abuts against the movable part 710, thereby achieving the installation of the movable part 710.
[0056] Further, as shown in Figure 7As shown, the second shell part 120 has a second protruding part 122 extending into the second recessed cavity 325, which is provided with the second bearing chamber 121 and a receiving cavity 123 for receiving the fixing member 720. The receiving cavity 123 is in communication with the second bearing chamber 121 and is distributed closer to the first bearing 400 than the second bearing chamber 121. As known from the above, the resolver 700 is also located in the second recessed cavity 325, and the overall structure is compact and occupies a small axial space.
[0057] The above description is merely illustrative of the embodiments of the present application and is not in any way intended to limit the patent scope of the present application. Any equivalent structures or equivalent process transformations made by using the content of the present application specification and drawings, or directly or indirectly applied to other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. A disc motor structure, characterized by, The application relates to a motor, comprising: a shell (100) comprising a first shell part (110) and a second shell part (120) matched with each other; a stator assembly (200) fixed in the shell (100); a rotor assembly (300) comprising a rotor disc (310) corresponding to the stator assembly (200) and a rotating shaft (320) mechanically connected with the rotor disc (310); a first bearing (400) and a second bearing (500) sleeved on the rotating shaft (320), the rotating shaft (320) being supported on the shell (100) through the first bearing (400) and the second bearing (500), and the first shell part (110) being provided with a first through hole (112) for the rotating shaft (320) to extend to the outside of the shell (100). The first bearing (400) is fixed in the axial direction, and the second bearing (500) is arranged in the axial direction in a floating mode, wherein the first bearing (400) is distributed close to the main output end of the rotating shaft (320).
2. The disc motor structure of claim 1, wherein The axial length of the first bearing (400) is L1, the axial length of the second bearing (500) is L2, and the axial length between the first bearing (400) and the second bearing (500) is L3. The stator assembly (200) and the rotor disc (310) axially adjacent to each other form a stator-rotor region in the axial direction, and the length of the stator-rotor region in the axial direction is L4, and L1+L2+L3<=L4.
3. The disc motor structure of claim 2, wherein The first bearing (400) and the second bearing (500) are located in the stator-rotor region; or The second bearing (500) is located in the stator-rotor region, and the first bearing (400) is partially located in the stator-rotor region and partially axially exceeds the stator-rotor region, wherein the length of the part of the first bearing (400) exceeding the stator-rotor region in the axial direction is 0.5mm-1.5mm.
4. The disc motor structure of claim 1, wherein The number of the rotor discs (310) is two, and the two rotor discs (310) are symmetrically distributed on the opposite sides of the stator assembly (200) to form a single-stator double-rotor distribution mode.
5. The disc motor structure of claim 1, wherein The inner wall of the first shell part (110) is recessed in the axial direction to form a first bearing chamber (111), the first bearing (400) is accommodated in the first bearing chamber (111), the inner wall of the second shell part (120) is recessed in the axial direction to form a second bearing chamber (121), and the second bearing (500) is accommodated in the second bearing chamber (121). The first bearing chamber (111) is further provided with a first nest (420) sleeved on the outer periphery of the first bearing (400), and the second bearing chamber (121) is further provided with a second nest (520) sleeved on the outer periphery of the second bearing (500).
6. The disc motor structure of claim 5, wherein The first bearing (400) is fixed in the axial direction through a first limiting structure. The first limiting structure comprises the first bearing chamber (111), a bearing pressing plate (410) cooperating with the first bearing chamber (111) to limit the first bearing (400) in the first bearing chamber (111), a first shaft shoulder (3211) and a clamping groove (3212) provided on the rotating shaft (320), and a clamping spring provided in the clamping groove (3212). The first shaft shoulder (3211) and the clamping spring are configured to limit the inner ring of the first bearing (400) in the axial direction, and the first bearing chamber (111) and the bearing pressing plate (410) are configured to limit the outer ring of the first bearing (400) in the axial direction.
7. The disc motor structure of claim 5, wherein The second bearing (500) is arranged in the axial direction by a second limiting structure. The second limiting structure comprises the second bearing chamber (121), an elastic member (510) provided in the second bearing chamber (121), and a second shaft shoulder (3213) formed on the rotating shaft (320), wherein one end of the second bearing (500) abuts against the elastic member (510), and the other end abuts against the second shaft shoulder (3213).
8. The disc motor structure of claim 1, wherein The rotating shaft (320) comprises a central shaft portion (321), an outer ring portion (322) annularly arranged outside the central shaft portion (321), and a connecting portion (323) connecting the central shaft portion (321) and the outer ring portion (322), wherein the first bearing (400) and the second bearing (500) are sleeved on the central shaft portion (321) and located on opposite sides of the connecting portion (323), and the rotor disc (310) is arranged on the outer ring portion (322) and vertically distributed with the central shaft portion (321). The connecting portion (323) divides the internal space of the outer ring portion (322) into a first recess (324) and a second recess (325) in the axial direction, the first bearing (400) is at least partially located in the first recess (324), and the second bearing (500) is at least partially located in the second recess (325).
9. A disc motor structure according to claim 8, characterised in that The central shaft portion (321) is further provided with a secondary output end (326) on the end side close to the second bearing (500), and the secondary output end (326) is drivingly connected with a pump (600).
10. The disc motor structure of claim 1, wherein The first bearing (400) is a double-row angular contact bearing, and the second bearing (500) is a deep groove ball bearing.