WO2018137390A1

WO2018137390A1 - Bearing housing assembly

Info

Publication number: WO2018137390A1
Application number: PCT/CN2017/111909
Authority: WO
Inventors: 夏光辉; 郭瑞水; 余欣锋; 邓益明; 余卫权
Original assignee: 珠海格力电器股份有限公司
Priority date: 2017-01-25
Filing date: 2017-11-20
Publication date: 2018-08-02
Also published as: CN208123115U; CN108343633A; CN108343631A

Abstract

The present invention relates to the technical field of air conditioning. Provided is a bearing housing assembly. The bearing housing assembly comprises a supporting bearing sleeve (332) and a housing frame (331). An inner ring surface of the supporting bearing sleeve (332) is provided on an external surface of a motor-rotated impeller shaft (321). The housing frame (331) is fixedly connected to the supporting bearing sleeve (332) to install the bearing housing assembly onto a fan housing (311). The supporting bearing sleeve (332) has a degree of flexibility. In the event of misalignment when the impeller shaft (321) first connects to the motor, the flexibility of the supporting bearing sleeve (332) allows adjustment according to the position of the impeller shaft (321) and an output shaft of the motor. The invention thereby reduces frictional wear on the impeller shaft (321) and the output shaft during misalignment and improves the service life of the impeller shaft (321) and a product thereof.

Description

Housing assembly

Technical field

The invention relates to a bearing seat assembly and belongs to the technical field of air conditioners.

Background technique

As a commonly used household appliance, air conditioners, the air duct and the waterway system and the bottom shell as a whole, are first assembled and fixed as the basic parts. If it is necessary to remove and wash, the professional parts of the air conditioner are required. It is extremely inconvenient to remove it after cleaning.

In the long-term use of air conditioners, dust and other debris entering the air duct and water channel from the air inlet make the entire air duct and waterway system seriously polluted. If not cleaned in time, it will cause harm to the environment during the operation of the air conditioner. It is of great significance to the health of users.

In order to solve the above technical problem, the Chinese patent document CN202792451U discloses a wall-mounted air conditioner indoor unit casing which is easy to be removed and washed, and includes a casing and a frame which are mutually interlocked, and the frame is separated, and the casing is first unloaded during cleaning. , remove the fixing screws between the upper frame and the lower frame, then remove the lower frame, then remove the fixing screws of the impeller and the impeller motor shaft, and continue to remove the upper and lower reinforcing rings of one side support frame, which can be easily Remove the impeller. That is to say, in the prior art, the lower frame needs to be removed first, and the impeller and the impeller motor are fixedly mounted on the lower frame. Therefore, the impeller and the impeller motor are also removed together with the lower frame, and then the impeller is removed. The screw between the impeller motor and the impeller and the motor is complicated to disassemble. In addition, in the prior art, one end of the impeller is rotatably disposed on the lower frame, and the other end is fixedly connected to the impeller motor shaft by a fixing screw, and the impeller motor is fixed on the lower frame.

In order to solve the above-mentioned complicated technical problem of disassembly, Chinese Patent No. CN2823621Y discloses a fan device for a household appliance, which includes a coupling device including an impeller nesting and fixing embedded in the center of the other end surface of the fan. a motor bushing mounted on a main shaft of the drive motor, wherein the impeller nest is provided with one or more mounting slots, and the motor bushing is provided with one or more mounting cards, when the fan needs to be removed for cleaning, only It is necessary to move the fan a certain distance in the direction of the fan end shaft, so that the fan can be easily taken out. That is, the above prior art impeller and The impeller motor is first removed together with the lower frame, and then the fan is moved to separate the fan from the motor to remove the fan. Because the one end of the impeller in the prior art is connected to the motor through the coupling device, the other end is rotatably disposed on the bottom casing, that is, the impeller bushing is suspendedly connected to the motor bushing. After the impeller is moved along the axis to separate the impeller bushing from the motor bushing, the impeller bushing has no support points, which causes the impeller to be skewed and dropped, which may cause damage to the impeller blade. Moreover, when the impeller bushing is assembled with the motor shaft, it is difficult to ensure that the impeller shaft and the motor shaft are collinear, thereby accelerating the wear of the impeller shaft and the motor shaft, only by adjusting the centering of the connecting faces of the two bushings.

Summary of the invention

The technical problem to be solved by the present invention is that the impeller bushing and the motor bushing are suspended and connected in the fan device of the prior art, and the separation of the impeller and the motor easily leads to the problem that the impeller disassembly process is dropped, thereby proposing a support for the support. Housing assembly for impeller bushings.

A bearing housing assembly provided by the present invention includes:

Supporting the sleeve, the inner annular surface is sleeved on the outer surface of the impeller shaft, and the impeller shaft is drivingly connected with the motor output shaft;

The seat bracket is fixedly connected with the support sleeve, and is fixedly mounted on the fan support.

Preferably, the support sleeve is an elastic sleeve.

Preferably, the seat bracket is sleeved on the outer side of the support sleeve.

Preferably, an impeller bearing is further disposed between the inner annulus of the support sleeve and the impeller shaft.

Preferably, the inner wall of the impeller bearing is formed with an oil groove.

Preferably, the support sleeve is a steel apron or a rubber apron or a plastic apron.

Preferably, the seat bracket is fixed to a side wall of the support sleeve axial direction and has an axially extending curved portion.

Preferably, the support sleeve and the seat bracket are integrally formed.

Preferably, the support sleeve is a self-lubricating rubber ring.

Preferably, the fan support is formed on the bottom case; the base support is provided with a branch that cooperates with the bottom case Rack connector.

Preferably, the bracket insertion portion includes: a bracket limiting portion for defining a depth of insertion of the bottom case, and a bracket guiding portion for mating with the guiding structure on the side wall of the bottom case.

Preferably, the bracket limiting portion has a plate structure, is symmetrically formed on the base body bracket and extends radially; the bracket limiting portion is perpendicular to the bracket guiding portion; and the bracket guiding portion is formed on the lower surface of the bracket limiting portion.

Preferably, the bracket insertion portion further includes a bracket barb that is hooked to the through hole of the side wall of the bottom case.

Preferably, the bracket insertion portion has a triangular flange structure corresponding to the inverted triangular groove at the edge of the bottom case; the bracket limiting portion is a root portion of the triangular flange structure; and the bracket guiding portion is formed in the triangular flange structure The strip-shaped grooves on the sides correspond to the strip-shaped projections in the inverted triangular grooves.

The present invention has the following advantages over the prior art:

1. The present invention provides a bearing housing assembly comprising a support bushing and a seat bracket. The inner ring surface of the support bushing is sleeved on the outer surface of the rotating shaft driven by the motor, and the seat bracket is fixedly connected with the support bushing. The impeller bearing block assembly is mounted on the fan support and disposed at the end of the impeller close to the motor, which solves the problem that the impeller bushing and the motor bushing are suspended and connected, and is used for setting the support point for the impeller bushing when the impeller is disassembled or assembled. Avoid damage to the impeller if it is skewed or dropped.

2. An impeller bearing block assembly provided by the present invention, the support bushing is an elastic bushing having a certain elasticity. When the rotating shaft and the motor are initially misaligned, the elastic condition of the supporting bushing can be The position of the rotating shaft and the output shaft of the motor is adaptively adjusted to offset the misalignment, reduce the wear on the rotating shaft and the output shaft, and improve the life of the rotating shaft and its products.

3. An impeller bearing block assembly provided by the present invention, the seat bracket is sleeved on the outer side of the support sleeve, that is, does not interfere with the rotating shaft on the inner ring surface of the support sleeve, and the sleeve connection also makes the support sleeve relatively The seat bracket does not shift.

4. An impeller bearing block assembly provided by the present invention, an impeller bearing is further disposed between the inner ring surface of the support bushing and the rotating shaft of the impeller, and the friction force between the impeller bearing and the rotating shaft is small, so that the rotating shaft is in the impeller bearing seat The resistance during rotation within the assembly is further reduced and the drive is smoother and smoother.

5. An impeller bearing block assembly provided by the present invention, wherein an oil groove is formed on an inner wall of the impeller bearing, so that The inner wall of the impeller bearing and the outer wall of the rotating shaft can be filled with lubricating oil, which reduces the friction between the two relative movements and improves the rotation efficiency.

6. The invention provides an impeller bearing block assembly, wherein the support sleeve is a steel sleeve or a rubber sleeve or a plastic sleeve. The steel bushing has a long life and the rubber bushing has good elasticity, and the plastic bushing is located between the two. In actual use, select different bushing materials as needed.

7. An impeller bearing block assembly provided by the present invention, wherein a support portion is disposed between the inner annular surface and the outer annular surface of the support bushing to support the inner annular surface and the outer annular surface of the support sleeve to prevent it from being squeezed Distorted, resulting in a rotational fit with the rotating shaft of the impeller. The seat bracket is fixed on a side wall of the support sleeve axial direction and has an axially extending curved portion, so that the impeller bearing seat assembly is effectively supported in the axial direction, avoiding between the rotating shaft and the rubber seat assembly The deflection of the angle also reduces the degree of wear of the rotating shaft.

8. The invention provides an impeller bearing seat assembly, wherein the supporting bushing and the seat bracket are integrally injection molded parts, thereby reducing the number of parts and simplifying the assembly process of the product.

9. An impeller bearing block assembly provided by the present invention, the support bushing being a self-lubricating bushing such that the friction between the bushing and the rotating shaft is small.

10. An impeller bearing block assembly provided by the present invention, the fan support is formed on the bottom case; the base support is provided with a bracket insertion portion that cooperates with the bottom case, that is, the seat bracket is fixed to the bottom case by quick plugging. On, to achieve a quick installation.

11. An impeller bearing block assembly provided by the present invention, the bracket insertion portion comprising: a bracket limiting portion for defining a depth of insertion of the bottom case, and a bracket guiding portion for mating with the guiding structure on the side wall of the bottom case. The bracket limiting portion limits the insertion position of the seat bracket, and the bracket guiding portion realizes the plug guiding, and the limiting position and the guiding combination accurately position and mount the seat bracket to realize accurate assembly of the impeller bearing seat assembly.

12. An impeller bearing block assembly provided by the present invention, the bracket limiting portion has a plate structure, is symmetrically formed on the base body bracket and extends radially to abut the edge of the fan support on the bottom case (ie The edge of the opening) is used to achieve the limit. The bracket guiding portion is formed on the lower surface of the bracket limiting portion, that is, the guiding position is first guided after the plugging process. The bracket limiting portion is perpendicular to the bracket guiding portion, so that the force on the bracket limiting portion is uniform, and the seat bracket is less inclined.

13. An impeller bearing block assembly according to the present invention, the bracket insertion portion further comprising a bracket barb hooked to the through hole of the side wall of the bottom case, thereby preventing the seat frame from being vibrated to escape the bottom case.

14. An impeller bearing block assembly provided by the present invention, the bracket insertion portion is a triangular flange structure corresponding to an inverted triangular groove at the edge of the bottom case (ie, the opening edge), and the triangular flange is inserted into the inverted triangular concave The slot connects the support sleeve to the bottom case. The bracket limiting portion is a root portion of the triangular flange; the bracket guiding portion is a strip-shaped groove formed on a side of the triangular flange, corresponding to the strip-shaped protrusion in the inverted triangular groove, guided by the bracket limiting portion and the bracket The part accurately positions the bearing block assembly on the bottom case.

DRAWINGS

In order to more clearly illustrate the specific embodiments of the invention or the technical solutions in the prior art, the drawings used in the specific embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the invention, and other drawings can be obtained from those skilled in the art without any creative work.

Figure 1 is an exploded view of the air conditioner of the present invention;

2 is a schematic structural view of an air duct assembly according to an embodiment of the present invention;

3 is a schematic structural view of a bearing housing assembly according to an embodiment of the present invention;

Figure 4 is an exploded view of the bearing housing assembly of the present invention;

Figure 5 is a schematic view showing the assembly structure of the support sleeve and the bottom case;

Figure 6 is a schematic structural view of another embodiment of the bearing housing assembly of the present invention;

Figure 7 is a schematic view showing the assembly structure of another support sleeve and a bottom case;

Figure 8 is a schematic structural view of still another embodiment of the bearing housing assembly of the present invention;

FIG. 9 is a schematic view showing the assembly structure of another support bushing and a bottom case.

Description of the reference signs:

100, base module; 101, base member; 141, fan motor; 142, output shaft; 200, heat exchange module; 220, heat exchanger; 300, air duct module; 310, bottom shell; Edge; 3102, guiding structure; 3103, through hole; 3104, inverted triangular groove; 3105, strip protrusion; 311, fan support; 320, impeller; 321, impeller shaft; 330, bearing block assembly; Body bracket; 3310, bracket insertion portion; 3311, bracket limit portion; 3312, bracket guide portion; 3313, bracket barb; 332, support sleeve; 334, impeller bearing; 400, appearance module.

detailed description

The technical solutions of the present invention will be clearly and completely described in the following with reference to the accompanying drawings. It is obvious that the described embodiments are a part of the embodiments of the invention, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the invention without departing from the inventive scope are the scope of the invention.

1 shows a modular air conditioner indoor unit according to the present invention, including a base module 100, a heat exchange module 200, a wind water module 300, and an appearance module 400. Wherein, the base module 100 includes a base member 101, and the heat exchange module 200 includes a heat exchanger 220.

The damper module 300 includes a duct assembly 301. As shown in FIG. 2, the duct assembly has a bottom casing 310. The bottom casing 310 is provided with a fan support 311; between the fan support 311 and the impeller shaft 321 of the impeller 320. A centering device is provided, the centering device being a bearing block assembly 330. An impeller 320 is mounted on the fan support 311, on the side of the impeller shaft 321 near the fan motor 141, and on the fan support 311 of the bottom casing 310 through the bearing block assembly 330, as shown in Figs. 3 and 4 to 9.

The impeller assembly in the air duct assembly 301, as shown in FIGS. 2 and 4 to 9, includes an impeller 320 having an impeller shaft 321 that is coupled to the fan motor 141 at one end of the fan motor 141 and the impeller shaft 321 One end is rotatably disposed on the bottom case 310. The impeller shaft 321 is adjacent to the end of the fan motor 141 and further has a bearing block assembly 330. The bearing block assembly 330 is adapted to be fixed to the bottom case 310. The bearing block assembly 330 of the embodiment includes: a support sleeve 332 and a seat bracket 331. The inner sleeve surface of the support sleeve 332 is sleeved on the outer surface of the impeller shaft 321 , and the rotating shaft and the fan motor 141 output shaft The transmission base is fixedly connected to the support sleeve 332 and is fixedly mounted on the support. An impeller bearing 334 is also disposed between the inner annular surface of the support sleeve 332 and the impeller shaft 321 of the impeller. The support sleeve 332 and the seat bracket 331 are integrally formed. The support bushing is a self-lubricating rubber ring. The seat bracket 331 is provided with a bracket insertion portion 3310 that cooperates with the bottom case 310. The bracket insertion portion 3310 includes a bracket limiting portion 3311 for defining a depth of insertion of the bottom case 310, and a bracket guiding portion 3312 for engaging with the guiding structure 3102 on the side wall of the bottom case 310. The support sleeve 332 is a self-lubricating elastic apron. An impeller bearing 334 and an impeller bearing 334 are further disposed in the support sleeve 332. Rotating cooperation with the impeller shaft 321 . The bottom case 310 has a side facing the heat exchange module 200, on which a water tank that receives and discharges condensed water from the heat exchange module 200 is formed. After the impeller 320 is mounted on the fan support 311, it is in the water tank.

In the above-described bearing block assembly 330, the bearing block assembly 330 is mounted on the support, which is disposed at one end of the impeller 320 near the fan motor 141, and solves the problem that the impeller shaft and the motor output shaft are suspended. In the prior art, when the impeller 320 is disassembled and the impeller 320 is moved away from the fan motor 141, the bearing block assembly 330 provided in this embodiment is used to support the impeller bushing near the end of the fan motor 141 to prevent the impeller 320 from being disassembled. Or the impeller 320 is damaged or dropped during assembly or damage. That is, after the operator pushes the impeller 320 away from the fan motor 141 before the impeller 320 needs to be removed for cleaning, the impeller 320 can be supported by the bearing block assembly 330. After the impeller 320 is cleaned, the impeller 320 is centered with the fan motor 141 by the bearing block assembly 330 before the impeller 320 is mated with the fan motor 141. The support sleeve 332 is an elastic sleeve and has a certain elasticity. When the rotation shaft and the fan motor 141 are initially misaligned, the elasticity of the support sleeve 332 can be adjusted according to the rotation axis and the output shaft of the fan motor 141. The position is adjusted adaptively to offset the misalignment, reduce the wear on the rotating shaft and the output shaft, and improve the life of the rotating shaft and its products. The seat bracket 331 is sleeved on the outer side of the support sleeve 332, that is, does not interfere with the rotating shaft on the inner ring surface of the support sleeve 332, and the sleeve connection also makes the support sleeve 332 not displaced relative to the seat bracket 331. . The inner wall of the impeller bearing 334 is formed with an oil groove, so that the inner wall of the impeller bearing 334 and the outer wall of the rotating shaft can be filled with lubricating oil, thereby reducing the friction between the two relative movements and improving the rotation efficiency. The seat bracket 331 is fixed on a side wall of the support sleeve 332 in the axial direction, and has an axially extending curved portion, so that the bearing block assembly 330 is effectively supported in the axial direction to avoid the rotating shaft and the rubber seat assembly. The deflection between the angles reduces the degree of wear of the rotating shaft.

The base bracket 331 is provided with a bracket insertion portion 3310 that cooperates with the bottom casing 310. The bracket insertion portion 3310 includes a bracket limiting portion 3311 for defining a depth of insertion with the bottom casing 310, and a sidewall of the bottom casing 310. The upper guiding structure 3102 is fitted with a bracket guiding portion 3312. The bracket limiting portion 3311 limits the insertion position of the seat bracket 331 , and the bracket guiding portion 3312 realizes the plug guiding. The limiting and guiding combination combines the seat bracket 331 to accurately position and mount, thereby realizing the precision of the bearing seat assembly 330 . assembly.

The bracket limiting portion 3311 has a plate structure and is symmetrically formed on the base bracket 331 and extends radially to abut against the lip 3101 on the fan support 311 of the bottom casing 310 to achieve the limit. Bracket guide The 3312 is formed on the lower surface of the bracket limiting portion 3311, that is, the first guiding rear limit position during the plugging process. The bracket limiting portion 3311 is perpendicular to the bracket guiding portion 3312, so that the force on the bracket limiting portion 3311 is uniform, and the seat bracket 331 is less inclined. The bracket insertion portion 3310 further includes a bracket barb 3313 that is hooked to the through hole 3103 of the side wall of the bottom case 310, thereby preventing the seat bracket 331 from being shaken to come out of the bottom case 310.

As a changeable embodiment, the bearing block assembly 330 of the present embodiment, as shown in FIG. 3 and FIG. 4 to FIG. 9 , includes: a support sleeve 332 having an inner annular surface sleeved on the outer surface of the impeller shaft 321 . The rotating shaft is connected to the output shaft 142 of the fan motor 141. The base bracket 331 is fixedly connected to the support sleeve 332 and is fixedly mounted on the support.

The bearing block assembly 330 is mounted on the support, which is disposed at an end of the impeller 320 near the fan motor 141, which solves the problem that the impeller bushing is suspended from the motor bushing. In the prior art, when the impeller 320 is disassembled and the impeller 320 is moved away from the fan motor 141, the bearing block assembly 330 provided in this embodiment is used to support the impeller bushing near the end of the fan motor 141 to prevent the impeller 320 from being disassembled. The impeller 320 is damaged or dropped during the process. That is, after the operator pushes the impeller 320 away from the fan motor 141 before the impeller 320 needs to be removed for cleaning, the impeller 320 can be supported by the bearing block assembly 330. After the impeller 320 is cleaned, the impeller 320 is centered with the fan motor 141 by the bearing block assembly 330 before the impeller 320 is mated with the fan motor 141.

A support portion is disposed between the inner annular surface and the outer annular surface of the support sleeve 332 to support the inner annular surface and the outer annular surface of the support sleeve to prevent it from being squeezed and twisted, so that the rotation shaft of the impeller 320 cannot be rotated and matched. . The seat bracket 331 is fixed on a side wall of the support sleeve 332 in the axial direction, and has an axially extending curved portion, so that the bearing block assembly 330 is effectively supported in the axial direction to avoid the rotating shaft and the rubber seat assembly. The deflection between the angles reduces the degree of wear of the rotating shaft.

As shown in FIG. 6, the support sleeve 332 and the seat bracket 331 are integrally molded, thereby reducing the number of parts and simplifying the product assembly process.

The support bushing 332 is a self-lubricating bushing so that the friction between it and the rotating shaft can be made small. The bearing block assembly 330 is formed on the bottom case 310. The base frame 331 is provided with a bracket insertion portion 3310 that cooperates with the bottom case 310. The seat frame 331 is fastened to the bottom case 310 by means of quick insertion. Achieve quick installation.

As shown in FIG. 7, the bracket insertion portion 3310 is the same as the bracket insertion portion 3310 described above, and includes: a bracket limiting portion 3311 for defining a depth of insertion with the bottom case 310, and a sidewall of the bottom case 310. The guide structure 3102 is fitted with a bracket guide portion 3312.

As a changeable embodiment, a bearing block assembly 330 of the present embodiment, as shown in FIG. 8, includes a support bushing 332 and a seat bracket 331. The inner ring surface of the support bushing 332 is sleeved outside the impeller shaft 321 On the surface, the rotating shaft is connected to the output shaft of the fan motor 141; the base bracket 331 is fixedly connected to the supporting sleeve 332 and is fixedly mounted on the support. The bearing block assembly 330 is mounted on the support, which is disposed at an end of the impeller 320 near the fan motor 141, which solves the problem that the impeller bushing is suspended from the motor bushing. In the prior art, when the impeller 320 is disassembled and the impeller 320 is moved away from the fan motor 141, the bearing housing assembly 330 provided in the embodiment is used to support the impeller bushing near the end of the fan motor 141 to prevent the impeller 320 from being disassembled. The impeller 320 is damaged or dropped during the loading process.

As shown in FIG. 8, the bracket insertion portion 3310 has a triangular flange structure corresponding to the inverted triangular groove 3104 at the lip 3101 of the bottom case 310, and the triangular flange is inserted into the inverted triangular groove 3104 so that the support sleeve 332 is The bottom case 310 is connected. The bracket limiting portion 3311 is a root portion of the triangular flange structure; the bracket guiding portion 3312 is a strip-shaped groove formed on a side of the triangular flange structure, corresponding to the strip-shaped protrusion 3105 in the inverted triangular groove 3104, through the bracket The limiting portion 3311 and the bracket guiding portion 3312 accurately position and fix the bearing housing assembly 330 on the bottom case 310.

It is apparent that the above-described embodiments are merely illustrative of the examples, and are not intended to limit the embodiments. Other variations or modifications of the various forms may be made by those skilled in the art in light of the above description. There is no need and no way to exhaust all of the implementations. Obvious changes or variations resulting therefrom are still within the scope of the invention.

Claims

A bearing block assembly, comprising:

a support sleeve (332), the inner annular surface is sleeved on the outer surface of the impeller shaft (321), and the impeller shaft (321) is drivingly connected with the motor output shaft;

The seat bracket (331) is fixedly connected to the support bushing (332) and is fixedly mounted on the fan support (311).
The bearing block assembly of claim 1 wherein said support bushing (332) is an elastomeric bushing.
The bearing block assembly of claim 2 wherein said seat bracket (331) is sleeved outside said support sleeve (332).
The bearing block assembly of claim 3 wherein an impeller bearing (334) is disposed between the inner annulus of the support bushing (332) and the impeller shaft (321) of the impeller.
The bearing block assembly of claim 4 wherein the inner wall of the impeller bearing (334) is formed with an oil groove.
The bearing block assembly of claim 4 wherein the support sleeve is a steel apron or a rubber apron or a plastic apron.
The bearing block assembly according to any one of claims 1 to 6, wherein the seat bracket (331) is fixed to a side wall of the support bushing (332) and has an axial extension. The curved part.
The bearing block assembly of claim 7 wherein said support bushing (332) integrally formed with the seat bracket (331).
The bearing block assembly of claim 8 wherein said support bushing is a self-lubricating rubber ring.
The bearing block assembly according to any one of claims 1 to 9, wherein the fan holder (311) is formed on the bottom case (310); the seat holder (331) is provided with a bottom A bracket (310) mating with the housing (310).
The bearing block assembly according to claim 10, wherein the bracket insertion portion (3310) comprises: a bracket limiting portion (3311) for defining a depth of insertion with the bottom case (310), and a bottom portion A guide guide (3312) that cooperates with the guide structure (3102) on the side wall of the shell (310).
The bearing block assembly according to claim 11, wherein the bracket limiting portion (3311) has a plate structure symmetrically formed on the seat bracket (331) and extends radially; the bracket is limited The portion (3311) is perpendicular to the bracket guiding portion (3312); the bracket guiding portion (3312) is formed on the lower surface of the bracket limiting portion (3311).
The bearing block assembly of claim 12, wherein the bracket insertion portion (3310) further comprises a bracket barb (3313) that is hooked to the through hole (3103) of the side wall of the bottom case (310).
The bearing block assembly according to claim 11, wherein the bracket insertion portion (3310) has a triangular flange structure corresponding to an inverted triangular recess at the lip (3101) of the bottom case (310) a groove (3104); the bracket limiting portion (3311) is a root portion of the triangular flange structure; the bracket guiding portion (3312) is a strip groove formed on a side of the triangular flange structure, Corresponding to the strip-shaped protrusions (3105) in the inverted triangular groove (3104).