Outer rotor cross-flow wind wheel with shock absorption structure and assembly process of outer rotor cross-flow wind wheel

Abstract

The invention relates to the technical field of cross-flow wind wheels, in particular to an outer rotor cross-flow wind wheel with a damping structure and an assembling technology of the outer rotor cross-flow wind wheel. The outer rotor cross-flow wind wheel comprises wind wheel fan blades, a connecting part and a damping part, and the connecting part is arranged on one side of the wind wheel fan blades and connected with the damping part; the damping part extends and is embedded in the inner wall of the connecting part and is used for connecting the motor rotor with the connecting part; the damping part comprises an abutting part and an extending part, the abutting part is arranged on the side wall of the connecting part and abuts against the side wall of the motor rotor, and the extending part penetrates into the connecting part and the motor rotor and positions and supports the abutting part. According to the cross-flow wind wheel, the operation noise after the cross-flow wind wheel is assembled with the outer rotor motor can be effectively reduced, and meanwhile application and popularization of the outer rotor motor in production and assembly of the cross-flow wind wheel are facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of crossflow wind wheels, and in particular to an outer rotor crossflow wind wheel with a shock absorbing structure and an assembly process thereof. Background Art

[0002] A crossflow fan, also known as a crossflow fan or a crossflow fan, is a ventilation device with a multi-blade, long cylindrical impeller. It is mainly composed of three parts: an impeller, an air duct, and a motor. It can effectively promote air circulation and maintain the freshness of indoor air and the appropriate temperature and humidity. It is now widely used in ventilation systems, refrigeration systems, and air circulation systems.

[0003] At present, the motors used in crossflow impellers are generally divided into inner rotor motors and outer rotor motors. In order to reduce the operating noise of the crossflow separation, rubber parts are generally installed at the connection between the inner rotor motor and the impeller for vibration reduction. When the outer rotor motor is connected to the impeller, the setting of the rubber parts at the connection between the two will cause the rotor to deflect and produce scraping edges, and the operating noise of the crossflow impeller will be aggravated, resulting in the difficulty of the smaller outer rotor motor to be widely used in the production and assembly of the crossflow impeller. Summary of the invention

[0004] In order to effectively improve the efficiency of existing pipeline construction in narrow spaces such as tunnels, the present application provides an outer rotor crossflow impeller with a shock-absorbing structure and an assembly process thereof.

[0005] The present application provides an outer rotor crossflow impeller with a shock absorbing structure and an assembly process thereof, which adopts the following technical solutions: In order to effectively reduce the operating noise of a crossflow wind wheel after assembling an outer rotor motor, and at the same time facilitate the promotion and application of outer rotor motors in the production and assembly of crossflow wind wheels, the present application provides an outer rotor crossflow wind wheel with a shock absorbing structure.

[0006] The outer rotor crossflow impeller with a shock absorbing structure provided in the present application adopts the following technical solution: An outer rotor crossflow wind wheel with a shock absorbing structure comprises: a wind wheel blade, a connecting portion and a shock absorbing portion, wherein the connecting portion is arranged on one side of the wind wheel blade and connected to the shock absorbing portion, and the shock absorbing portion extends and is embedded in the inner wall of the connecting portion and is used to connect the motor rotor to the connecting portion; The shock absorbing part comprises: an abutment member and an extension member, wherein the abutment member is arranged on the side wall of the connecting part and abuts against the side wall of the motor rotor, and the extension member penetrates into the interior of the connecting part and the motor rotor and positions and supports the abutment member.

[0007] By adopting the above technical solution, the connecting portion can connect the wind rotor blades to the motor rotor of the outer rotor motor, and the rigid connection between the motor rotor and the wind rotor blades can be reduced by providing a shock absorbing member between the connecting portion and the motor rotor, thereby effectively reducing the direct transmission of vibration between the motor rotor and the wind rotor blades. In addition, compared with the existing outer rotor cross-flow fan, the present application has an abutment piece between the connecting part and the motor rotor, and the two sides of the abutment piece are embedded into the inner side of the connecting part and the motor rotor through extension pieces, which can effectively reduce the shaking of the motor rotor during operation. While reducing the vibration transmission between the motor rotor and the connecting part, it can also better improve the running smoothness of the motor rotor, thereby achieving the purpose of reducing the running noise of the outer rotor cross-flow fan.

[0008] Optionally, the connecting part includes: a supporting member and a linkage member, wherein the supporting member is arranged on one side of the wind wheel blade and is connected to the abutment member through an extension member, and the linkage member is arranged through the inner wall of the supporting member and is used to be connected to the motor shaft.

[0009] By adopting the above technical solution, the supporting member can support and position the abutment member by connecting with the extension member. At the same time, it is connected to the motor shaft through a linkage member to facilitate the positioning and installation of the outer rotor motor on one side of the wind wheel blade, thereby improving the operating stability of the outer rotor motor.

[0010] Optionally, the connecting portion further includes: an assembly part, which is arranged on the side wall of the motor rotor and connected to the abutment part through an extension part.

[0011] By adopting the above technical solution, the assembly can be connected to the side wall of the motor rotor, so that the extension part located on one side of the abutment can be connected to the motor rotor by penetrating and embedding in the inner side of the assembly, thereby better improving the connection stability between the motor rotor and the abutment, and achieving the purpose of further improving the running stability of the external rotor motor.

[0012] Optionally, a plurality of the extension members are provided, and the plurality of extension members all penetrate into the interior of the support member and the assembly member.

[0013] By adopting the above technical solution, the multiple extension parts can better enhance the connection area between the abutment parts, the support parts and the assembly parts, thereby effectively improving the connection stability between the wind wheel blades and the motor rotor, thereby improving the transmission efficiency of the motor rotor and better reducing the noise generated by the vibration of the motor rotor during operation.

[0014] Optionally, the shock absorbing part further includes: a first positioning member, which is arranged on the side wall of the extending member and abuts against the inner wall of the supporting member and the assembly member.

[0015] By adopting the above technical solution, the first positioning member can better increase the connection area between the extension member and the support member and the assembly member, which can help to improve the connection strength of the abutment member inside the support member and the assembly member, and then more effectively enhance the shock absorbing effect of the shock absorbing member of the present application between the motor rotor and the wind wheel blades.

[0016] Optionally, the shock absorbing part further includes: a second positioning member, which is arranged at the end of the extending member and abuts against a side of the supporting member close to the wind wheel blades.

[0017] By adopting the above technical solution, the second positioning member can enhance the clamping effect of the abutting member on the other side of the supporting member by abutting against the side of the supporting member close to the wind wheel blades, so that the abutting member can simultaneously clamp and dampen both sides of the supporting member, further enhancing the shock-absorbing and noise-reducing effect between the motor rotor and the wind wheel blades.

[0018] Optionally, an output member connected to the linkage member is disposed inside the support member, and a plurality of output members are disposed at positions corresponding to the extension member, and the plurality of output members are respectively connected to the extension members at corresponding positions.

[0019] By adopting the above technical solution, the guide piece can disperse the vibration generated during the operation of the motor shaft and guide it to the extension piece through the connection between the extension piece and the motor shaft, thereby better enhancing the shock-absorbing effect of the shock-absorbing part of the present application on the outer rotor motor installed on one side of the cross-flow impeller, and further effectively reducing the noise generated by the outer rotor motor when operating on one side of the cross-flow impeller.

[0020] Optionally, a mounting member is provided on the side wall of the support member, and the mounting member corresponds to the position of the outlet member and is respectively connected to the outlet member and the motor shaft.

[0021] By adopting the above technical solution, the mounting part facilitates the connection setting of the outlet part inside the supporting part. At the same time, the mounting part is respectively connected with the outlet part and the motor shaft, which can effectively reduce the vibration transmitted to the supporting part by the motor shaft, thereby achieving the purpose of reducing the operating noise of the outer rotor crossflow impeller.

[0022] On the other hand, the present application also provides an assembly process of an outer rotor crossflow wind wheel with a shock absorbing structure, comprising the following steps: Align the outer rotor motor to one side of the wind wheel blades; Insert the motor shaft into the center of the fan blades; An abutment piece is integrally injection molded between the connection part and the motor rotor, so that the extension pieces on both sides of the abutment piece are respectively penetrated and embedded into the connection part and the motor rotor, thereby completing the assembly of the outer rotor crossflow impeller with a shock absorbing structure.

[0023] By adopting the above technical solution, the wind wheel blades and the motor rotor can be effectively damped by the damping part, and the connection stability between the wind wheel blades and the motor rotor can be better enhanced, thereby achieving the purpose of better reducing the noise generated by the existing wind wheel blades during operation.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The connecting part can connect the wind wheel blades with the motor rotor of the outer rotor motor, and reduce the rigid connection between the motor rotor and the wind wheel blades by setting a shock-absorbing member between the connecting part and the motor rotor, thereby effectively reducing the direct transmission of vibration between the motor rotor and the wind wheel blades; in addition, compared with the existing outer rotor crossflow wind wheel, the present application can effectively reduce the shaking of the motor rotor during operation by abutting the connecting part and the motor rotor with abutting members, and making the two sides of the abutting members penetrate and embed into the inner side of the connecting part and the motor rotor through the extension members, thereby reducing the vibration transmission between the motor rotor and the connecting part, and better improving the running stability of the motor rotor, so as to achieve the purpose of reducing the running noise of the outer rotor crossflow wind wheel; 2. By providing a supporting member, the abutting member can be supported and positioned by connecting with the extension member, and at the same time, the supporting member can be connected with the motor shaft through the linkage member, so as to facilitate the positioning and installation of the outer rotor motor on one side of the wind wheel blade, thereby improving the operating stability of the outer rotor motor; 3. By providing the first positioning member, the connection area between the extension member and the support member and the assembly member can be better improved, so as to help improve the connection strength of the abutment member inside the support member and the assembly member, thereby more effectively enhancing the shock absorbing effect of the shock absorbing member of the present application between the motor rotor and the wind wheel blades; 4. By setting up the output piece, it is possible to connect with both the extension piece and the motor shaft at the same time, which is beneficial to disperse the vibration generated during the operation of the motor shaft and output it to the extension piece, thereby better enhancing the shock-absorbing effect of the shock-absorbing part of the present application on the outer rotor motor installed on one side of the cross-flow impeller, and further effectively reducing the noise generated by the outer rotor motor when it is running on one side of the cross-flow impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of an outer rotor crossflow wind wheel according to a first embodiment of the present application; Figure 2 is a schematic cross-sectional view of a partial structure of an outer rotor crossflow impeller according to a first embodiment of the present application; Figure 3 is a cross-sectional schematic diagram of an outer rotor motor, a damping part and a connecting part in a first embodiment of the present application; Figure 4This is a schematic diagram of the structure of a support member, an assembly member and a linkage member in Embodiment 1 of the present application; Figure 5 This is a schematic structural diagram of an outer rotor motor, a damping part and a connecting part according to a second embodiment of the present application; Figure 6 is a cross-sectional schematic diagram of an outer rotor motor, a damping part and a connecting part according to a second embodiment of the present application; Figure 7 This is a schematic diagram of the internal structure of the support member of the second embodiment of the present application; Figure 8 yes Figure 7 A magnified view of part A; Fig. 9 This is a schematic diagram of the structure of the export component and the installation component of the second embodiment of the present application; Fig.10 It is a schematic diagram of the exploded structure of the export component and the mounting component of the second embodiment of the present application.

[0026] Description of the accompanying drawings: 1, wind wheel blade; 2, connecting part; 21, supporting member; 211, coupling hole; 212, fitting hole; 213, outlet hole; 214, clearance groove; 215, arc-shaped convex strip; 22, linkage member; 23, assembly member; 24, outlet member; 241, connecting strip; 242, top support block; 243, arc-shaped matching groove; 244, spring; 245, ejector block; 245a, second inclined surface; 25, mounting member; 251, Limiting strip; 251a, locking block; 251b, locking screw; 252, tightening strip; 253, slide groove; 254, guide groove; 255, slider; 255a, first inclined surface; 256, storage groove; 257, accommodating groove; 258, ball bearing; 259, groove; 3, shock absorbing part; 31, abutment member; 32, extension member; 33, first positioning member; 34, second positioning member; 35, connecting member; 4, motor rotor; 5, motor shaft. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-10 This application is described in further detail.

[0028] Embodiment 1 The embodiment of the present application discloses an outer rotor crossflow wind wheel with a shock absorbing structure. Figure 1-2 The outer rotor crossflow wind wheel comprises a wind wheel blade 1, a connecting portion 2 and a shock absorbing portion 3. The connecting portion 2 is arranged on one side of the wind wheel blade 1, and the shock absorbing portion 3 is arranged on the other side of the connecting portion 2 and is used to connect with the motor rotor 4 of the outer rotor motor.

[0029] At the same time, a mounting part 23 is provided on one side of the outer rotor motor close to the output end of the motor shaft 5, the inner wall of one side of the mounting part 23 is connected to the outer wall of the motor rotor 4, and the other side of the mounting part 23 is abutted against the side wall of the shock absorbing part 3. In this embodiment, the mounting part 23 can be selected as an inner flange, and in another embodiment, the mounting part 23 can be selected as an outer flange.

[0030] Reference Figure 2-4 In this embodiment, the connection part 2 includes a support member 21 and a linkage member 22. The support member 21 is arranged on the side wall of the wind wheel blade 1 and connected to the shock absorbing part 3. At the same time, a coupling hole 211 is opened at the center of the support member 21, and the linkage member 22 is arranged on the side of the support member 21 close to the outer rotor motor and extends to the inside of the coupling hole 211. In this embodiment, the support member 21 can be made of plastic material, and in another embodiment, the support member 21 can be made of metal material.

[0031] In addition, in this embodiment, the shock absorbing part 3 includes an abutment member 31 and an extension member 32. Among them, a plurality of fitting holes 212 are evenly opened on the surface of the support member 21, the abutment member 31 is arranged on the side of the support member 21 close to the outer rotor motor, and a plurality of extension members 32 are arranged and evenly distributed on both sides of the abutment member 31. At the same time, the extension members 32 located on both sides of the abutment member 31 are respectively penetrated and embedded in the fitting hole 212 and the flange hole of the assembly member 23.

[0032] In addition, refer to Figure 2-4 In order to better improve the connection stability between the shock absorbing part 3 and the assembly part 23, a plurality of arc-shaped strip holes distributed in a circumferential array are provided on the inner wall of the assembly part 23, and the plurality of arc-shaped strip holes are connected to the flange center hole of the assembly part 23. At the same time, a plurality of connecting members 35 are provided on the side wall of the abutting member 31, which are respectively inserted into the arc-shaped strip holes at corresponding positions. In this embodiment, the abutting member 31, the extension member 32 and the connecting member 35 are all selected to be rubber.

[0033] On the other hand, an embodiment of the present application further provides an assembly process of an outer rotor crossflow wind wheel with a shock absorbing structure, comprising the following steps: Step 1: Install one side of the motor shaft of the outer rotor motor on one side of the wind wheel blade 1, so that the center line positions of the assembly part 23 and the support part 21 are aligned; Step 2: Insert the motor shaft 5 into the coupling hole 211 at the center of the support member 21 and rotate it with the linkage member 22; Step three: An abutment member 31 is integrally injection molded between the support member 21 and the assembly member 23, so that the extension members 32 on both sides of the abutment member 31 are respectively penetrated and embedded in the embedding hole 212 and the flange hole of the assembly member 23, and at the same time, multiple connecting members 35 are respectively penetrated and embedded in the arc-shaped strip holes at the corresponding positions of the assembly member 23, so that the motor rotor 4 is injection-molded and connected to one side of the wind wheel blade 1 by means of integral injection molding of rubber, thereby completing the assembly of the outer rotor cross-flow wind wheel with a shock-absorbing structure of the present application.

[0034] Embodiment 2 The difference between the second embodiment and the first embodiment is that, referring to Figure 5-7 In this embodiment, the shock absorbing part 3 also includes a first positioning member 33 and a second positioning member 34. Among them, the inner walls of the support member 21 and the assembly member 23 corresponding to the position of the extension member 32 are symmetrically provided with two clearance grooves 214, and both ends of each clearance groove 214 are through-set. At the same time, there are two first positioning members 33, and the two first positioning members 33 are respectively arranged on both sides of the extension member 32 and embedded in the clearance grooves 214 at the corresponding positions of the support member 21 and the assembly member 23. In addition, a plurality of arc-shaped convex strips 215 are arranged on the inner wall of each embedding hole 212 and on the edge of one side close to the wind wheel blade 1, and the second positioning member 34 is arranged on the side of the arc-shaped convex strip 215 close to the wind wheel blade 1 and connected to the end of the extension member 32 at the corresponding position. In this embodiment, the first positioning member 33 and the second positioning member 34 can be selected as rubber.

[0035] Reference Figure 6-8 In order to further enhance the shock absorbing effect of the shock absorbing part 3, an outlet member 24 is provided inside the support member 21 and at a position corresponding to each extension member 32. At the same time, both ends of the outlet member 24 are respectively connected to the fitting hole 212 and the coupling hole 211.

[0036] Reference Figure 8-10 In this embodiment, the guide member 24 includes a connecting strip 241 and a top support block 242. Among them, a guide hole 213 is opened inside the support member 21, and the two ends of the guide hole 213 are respectively connected with the fitting hole 212 and the coupling hole 211, and the side of the guide hole 213 away from the wind wheel blade 1 is through-set. At the same time, the connecting strip 241 is slidably set inside the guide hole 213, and one end of the connecting strip 241 is set as a semicircular head and abuts against the motor shaft 5. In addition, an arc-shaped matching groove 243 is opened at the other end of the connecting strip 241, and a spring 244 is arranged in the arc-shaped matching groove 243, and the top support block 242 is slidably set in the arc-shaped matching groove 243 and connected to the other end of the spring 244.

[0037] Reference Figure 7 and 8-10, in order to improve the stability of the connecting strip 241 in the outlet hole 213, a mounting member 25 is embedded and arranged on the side of the outlet hole 213 close to the outer rotor motor. And in this embodiment, the mounting member 25 includes a limiting strip 251 and a tightening strip 252. Among them, the limiting strip 251 is slidably inserted into the interior of the outlet hole 213 and abuts against the side wall of the connecting strip 241. At the same time, a slide groove 253 is provided on the side of the limiting strip 251 away from the connecting strip 241, and guide grooves 254 perpendicular to the length direction of the limiting strip 251 are provided on the groove walls on both sides of the slide groove 253. In addition, a slider 255 is provided in the slide groove 253, and the two sides of the slider 255 are respectively slidably connected with the two guide grooves 254 in the slide groove 253. In addition, a receiving groove 256 is provided on the side of the limiting strip 251 corresponding to the slide groove 253 close to the coupling hole 211, and one end of the tightening strip 252 is hinged in the receiving groove 257 provided at the bottom of the slider 255 and is engaged with the receiving groove 256, and the end of the tightening strip 252 away from the slider 255 is set as an arc surface, and a plurality of balls 258 are provided at one end of the arc surface of the tightening strip 252 to abut against the outer wall of the motor shaft 5.

[0038] Meanwhile, a first inclined surface 255a is provided at the bottom of the slider 255 near the connecting strip 241, and an ejection block 245 is provided at the side wall of the connecting strip 241, and a second inclined surface 245a is provided on the top surface of the ejection block 245 away from the connecting strip 241, which is in contact with the first inclined surface 255a on one side of the slider 255. In addition, in order to facilitate the movement of the locking block 251a in the slide groove 253, a groove 259 is provided on the bottom surface of the slide groove 253 near the connecting strip 241.

[0039] In addition, refer to Figure 6 and 9 -10. In order to achieve the positioning of the limiting strip 251, a locking block 251a is provided on one side of the limiting strip 251, and a locking screw 251b is provided through the locking block 251a. At the same time, a locking groove engaged with the locking block 251a is provided on the side of the support 21 close to the outer rotor motor, so that the limiting strip 251 can be positioned and installed in the outlet hole 213 by embedding the locking block 251a in the locking groove and then cooperating with the thread of the locking groove through the locking screw 251b.

[0040] Working principle: First, slide the connecting strip 241 and the supporting block 242 as a whole into the outlet hole 213, so that the supporting block 242 is close to the hole wall of the fitting hole 212, and at the same time, the other end of the connecting strip 241 extends into the coupling hole 211, then slide the limiting strip 251 into the outlet hole 213, and limit the position of the limiting strip 251 by the threaded cooperation of the locking screw 251b and the locking groove, and then assemble the motor shaft 5 into the coupling hole 211, at which time the connecting strip 241 will be pushed by the motor shaft 5 The top support block 242 is made flush with the hole wall of the fitting hole 212. At the same time, the end of the tightening strip 252 away from the slider 255 will be against the outer wall of the motor shaft 5 through a plurality of balls 258 arranged on the arc surface. Finally, the assembly part 23 and the support part 21 are integrally injection molded, so that the first positioning part 33 and the second positioning part 34 are respectively formed on the side wall and the end position of the extension part 32, thereby effectively improving the shock absorbing effect between the assembly part 23 and the support part 21, thereby achieving the purpose of reducing the operating noise of the existing cross-flow impeller.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An outer rotor crossflow wind wheel with a shock absorbing structure, characterized in that: include: A wind wheel blade (1), a connecting portion (2) and a shock absorbing portion (3), wherein the connecting portion (2) is arranged on one side of the wind wheel blade (1) and is connected to the shock absorbing portion (3), and the shock absorbing portion (3) extends and is embedded in the inner wall of the connecting portion (2) and is used to connect the motor rotor (4) to the connecting portion (2); The shock absorbing part (3) comprises: an abutment member (31) and an extension member (32); the abutment member (31) is arranged on a side wall of the connecting part (2) and abuts against a side wall of the motor rotor (4); the extension member (32) penetrates into the interior of the connecting part (2) and the motor rotor (4) and positions and supports the abutment member (31).

2. The outer rotor crossflow impeller with a shock absorbing structure according to claim 1, characterized in that: The connecting portion (2) comprises: a supporting member (21) and a linkage member (22); the supporting member (21) is arranged on one side of the wind wheel blade (1) and is connected to the abutment member (31) via an extension member (32); the linkage member (22) is arranged through the inner wall of the supporting member (21) and is used to be connected to the motor shaft (5).

3. The outer rotor crossflow impeller with a shock absorbing structure according to claim 2, characterized in that: The connecting portion (2) further comprises: an assembly part (23), wherein the assembly part (23) is arranged on the side wall of the motor rotor (4) and is connected to the abutment part (31) via an extension part (32).

4. The outer rotor crossflow impeller with a shock absorbing structure according to claim 3, characterized in that: A plurality of the extension pieces (32) are provided, and the plurality of the extension pieces (32) all penetrate into the interior of the support piece (21) and the assembly piece (23).

5. The outer rotor crossflow impeller with a shock absorbing structure according to claim 3, characterized in that: The shock absorbing part (3) further comprises: a first positioning member (33), wherein the first positioning member (33) is arranged on a side wall of the extension member (32) and abuts against inner walls of the support member (21) and the assembly member (23).

6. The outer rotor crossflow impeller with a shock absorbing structure according to claim 5, characterized in that: The shock absorbing part (3) further comprises: a second positioning member (34), the second positioning member (34) being arranged at an end of the extending member (32) and abutting against a side of the supporting member (21) close to the wind wheel blade (1).

7. The outer rotor crossflow impeller with a shock absorbing structure according to claim 6, characterized in that: An output member (24) connected to the linkage member (22) is arranged inside the support member (21), and a plurality of output members (24) are arranged at positions corresponding to the extension member (32), and the plurality of output members (24) are respectively connected to the extension members (32) at corresponding positions.

8. The outer rotor crossflow impeller with a shock absorbing structure according to claim 7, characterized in that: A mounting member (25) is provided on the side wall of the support member (21); the mounting member (25) corresponds to the position of the outlet member (24) and is respectively connected to the outlet member (24) and the motor shaft (5).

9. An assembly process of an outer rotor crossflow wind wheel with a shock absorbing structure, used for an outer rotor crossflow wind wheel with a shock absorbing structure as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: Align the outer rotor motor to one side of the wind wheel blade (1); Insert the motor shaft (5) into the center of the wind wheel blade (1) accordingly; An abutment piece (31) is integrally injection-molded between the connection portion (2) and the motor rotor (4), so that the extension pieces (32) on both sides of the abutment piece (31) respectively penetrate and engage into the interior of the motor rotor (4) and the connection portion (2), thereby completing the assembly of the outer rotor crossflow impeller with a shock-absorbing structure.

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