Motor air guide structure

Abstract

The utility model relates to motor structure field especially relates to a motor air -guide structure, including rear end cover, the air -guide hood of setting in the rear end cover outside, air -guide hood sets up the side wall one and side wall two of tubular structure, one end of side wall one is connected with side wall two through transition surface, the other end is provided with the wind -proof surface, the wind -proof surface extends from side wall one end department to the axis of air -guide hood, forms the air inlet, the periphery of side wall two is provided with a plurality of bayonet, the periphery of rear end cover is provided with a plurality of wedge -shaped clamping blocks. Through setting up a plurality of wedge -shaped clamping blocks on the rear end cover and setting up the bayonet matched with it on the air -guide hood, combining the limiting boss, when installing, the end face of rear end cover and limiting boss abut, the clamping block and bayonet are engaged, realize both firm and reliable installation, through setting up a plurality of deep, shallow open slot on the open end of air -guide hood, combining the chamfer of open end, when installing air -guide hood, rely on the elastic deformation and prop open air -guide hood, close and tightly clamp after installing in place, the tight package prevents the air leakage.

Description

Technical Field

[0001] This utility model relates to the field of motor structure, and in particular to a motor air guide structure. Background Technology

[0002] An electric motor is a common device that converts electrical energy into mechanical energy, widely used in industry, household appliances, transportation, and other fields. With the rapid development of industrial automation, new energy, and electric vehicles, higher demands are placed on the structural design of electric motors, requiring continuous optimization in areas such as reliability, efficiency, simplicity, lightweight design, heat dissipation management, and intelligent operation. In some motor structures, a fan cover is installed over the rear end cover to protect the fan blades and ensure efficient heat dissipation.

[0003] Utility model patent with patent number 201920459124.4 discloses a fan cover mounting structure for an electric motor, including a rear end cover and a fan cover fitted together. The connection between the two is achieved by engaging the locking blocks and connecting seats on the rear end cover with the locking grooves on the inner wall of the fan cover. However, due to the high rigidity of the fan cover, this installation method is not easy in practice. Utility Model Content

[0004] Technical objective: In order to overcome the shortcomings of the existing technology, this utility model provides a motor air guide structure that is simple in structure, easy to install, and provides efficient heat dissipation.

[0005] Technical Solution: To achieve the above objectives, this utility model discloses an electric motor air guide structure, including a rear end cover, an air guide shroud sleeved on the outside of the rear end cover, and a fan blade disposed between the air guide shroud and the rear end cover. The air guide shroud is provided with a cylindrical side wall one and a side wall two. One end of the side wall one is connected to the side wall two through a transition surface, and the other end is provided with a windproof surface. The windproof surface extends from the end of the side wall one towards the axis of the air guide shroud to form an air inlet. The side wall two is provided with a plurality of slots circumferentially, and the rear end cover is provided with a plurality of wedge-shaped blocks circumferentially. When the rear end cover and the air guide shroud are sleeved and connected, the slots engage with the blocks, and the rear end cover is limited by the transition surface and the slots.

[0006] Furthermore, a limiting boss is provided on the inner side of the second sidewall. The upper end face of the limiting boss is connected to the transition surface. When the rear end cover is sleeved and connected to the air guide cover, the end face of the rear end cover abuts against the lower end face of the limiting boss, and the rear end cover is limited by the buckle and the limiting boss.

[0007] Furthermore, the second sidewall is also provided with a plurality of opening slots, which extend axially from the opening end of the second sidewall.

[0008] Furthermore, the opening slot includes several shallow slots and several deep slots. The axial length of the shallow slots is less than that of the sidewall of the rear end cover, and the axial length of the deep slots is greater than that of the sidewall of the rear end cover. The portion of the deep slots longer than the sidewall of the rear end cover can fit and press against the motor lead wire after it is led out.

[0009] Furthermore, the inner circumferential side of the two opening ends of the sidewall is provided with a chamfer that facilitates fitting with the rear end cover.

[0010] Furthermore, the rear end cover has a shaft hole at the center of its end face for the rotor shaft to pass through, and the rear end cover also has several ventilation holes that penetrate the end face and side wall. The rear end cover also has several outward protrusions on its side wall, and the outward protrusions have bolt holes for screwing into the stator core.

[0011] Furthermore, the second sidewall is provided with an outer flange that is adapted to the outer protrusion.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This utility model's air guide structure, through the inclusion of several wedge-shaped locking blocks on the rear end cover and corresponding locking slots on the air guide shroud, combined with a limiting boss, ensures a secure and reliable installation during installation. Furthermore, the air guide shroud's opening end features several deep and shallow grooves, along with a chamfered opening. During installation, the air guide shroud expands due to elastic deformation and closes tightly after installation, preventing air leakage. The deep grooves also conform to and press against the motor wires after they are led out, forming a closed enclosure and reducing lateral air leakage. This air guide structure guarantees excellent ventilation, is simple in structure, and is easy to install. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the air guide shroud structure;

[0015] Figure 2 This is a schematic diagram of the rear end cover structure;

[0016] Figure 3 Top view showing the fit between the air guide cover and the rear end cover;

[0017] Figure 4 for Figure 3 Sectional view of AA;

[0018] Figure 5 This is a schematic diagram of the structure where the rear end cover is installed on the motor.

[0019] In the diagram, 1. air guide cover; 2. rear end cover; 3. fan blade; 4. side wall one; 5. side wall two; 6. transition surface; 7. windproof surface; 8. air inlet; 9. bayonet; 10. locking block; 11. limiting block; 12. opening groove; 13. chamfer; 14. shaft hole; 15. ventilation hole; 16. outward protrusion; 17. bolt hole; 18. outward flange. Detailed Implementation

[0020] The following is in conjunction with the appendix Figure 1 To be continued Figure 5 The principles and features of this utility model are described, and the examples given are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0021] An electric motor air guide structure includes an air guide shroud 1, a rear end cover 2, and a fan blade 3 arranged coaxially. The air guide shroud 1 is sleeved on the outside of the rear end cover 2, the rear end cover 2 is fixedly installed on the stator core, and the fan blade 3 is arranged between the air guide shroud and the rear end cover.

[0022] The air guide shroud 1 is provided with a cylindrical side wall 4 and a cylindrical side wall 5. One end of the cylindrical side wall 4 is connected to the cylindrical side wall 5 through a transition surface 6, and the other end is provided with a windproof surface 7. The windproof surface 7 extends from the end of the cylindrical side wall 4 to the axis of the air guide shroud 1, forming an air inlet 8. The air guide shroud 1 adopts a small-diameter air inlet structure, that is, the windproof surface 7 is an elongated anti-backdraft baffle, so that the wind blown by the fan blade 3 onto the windproof surface 7 forms a vortex, which will not blow out of the air inlet 8 and form backdraft turbulence that affects the air intake effect, ensuring the ventilation effect of the motor, improving the motor temperature rise, and extending the motor life.

[0023] The rear end cover 2 is a cover-shaped structure. The center of the end face is provided with a shaft hole 14 for the rotor shaft to pass through. The rear end cover 2 is also provided with several ventilation holes 15 that penetrate the end face and side wall. The side wall of the rear end cover 2 is also provided with several protrusions 16. The cross-section of the protrusions 16 is arc-shaped or semi-circular and extends along the axial direction of the rear end cover 2. The protrusions 16 are provided with bolt holes 17 for screwing with the stator core. The side wall 2 is provided with an outer flange 18 that matches the protrusions 16. After the rear end cover 2 is screwed with the stator, the air guide shroud 1 is fitted on the outside of the rear end cover 2. At this time, the outer flange 18 is fitted on the outer protrusions 16, and the screws are not exposed, which is simple and beautiful.

[0024] The air guide shroud 1 and the rear end cover 2 are axially positioned through a positioning and snap-fit ​​structure. Specifically, the positioning and snap-fit ​​structure consists of several slots 9 on the side wall 2 5 and several wedge-shaped blocks 10 on the rear end cover 2. The bottom surface of each wedge-shaped block 10 faces the opening of the rear end cover 2. Each slot 9 corresponds to a block 10. Specifically, there are three slots 9 evenly distributed circumferentially on the side wall 2 5, and similarly, three blocks 10 evenly distributed circumferentially on the outer side wall of the rear end cover 2. When the rear end cover 2 is fitted and connected to the air guide shroud 1, the end face of the rear end cover 2 abuts against the transition surface 6, and the slots 9 and blocks 10 snap together, thus limiting the rear end cover 2's position. In one embodiment, a limiting boss is provided on the inner side of sidewall 2 5. The upper end face of the limiting boss is connected to the transition surface 6. When the rear end cover 2 is sleeved and connected to the air guide shroud 1, the end face of the rear end cover 2 abuts against the lower end face of the limiting boss, and the rear end cover 2 is limited by the snap 9 and the limiting boss. The limiting boss can be a block-shaped limiting block 11 or a boss extending circumferentially along sidewall 2 5. Specifically, there are 6 limiting blocks 11, arranged in pairs with intervals within each pair, and the three pairs are evenly arranged on the inner side of sidewall 2 5. By setting the limiting boss, a certain accommodating space can be formed between the transition surface 6 and the end face of the rear end cover 2, which not only facilitates heat dissipation but also accommodates the screw head connecting the rear end cover 2 to the stator. The radial positioning of the air guide shroud 1 and the rear end cover 2 is achieved by the mutually cooperating inner diameter of the air guide shroud 1 and the outer diameter of the rear end cover 2. This technical feature belongs to the prior art and will not be described again.

[0025] The air guide shroud 1 and the rear end cover 2 are fully enclosed. The side wall 2 5 has several opening slots 12, extending axially from the opening end of the side wall 2 5. Each opening slot 12 includes several shallow slots and several deep slots. The axial length of the shallow slots is less than the axial length of the side wall of the rear end cover 2, while the axial length of the deep slots is greater than the axial length of the side wall of the rear end cover 2. The portion of the deep slots longer than the side wall of the rear end cover 2 can fit snugly against the motor lead wire after it is led out, forming a closed enclosure, reducing side air leakage and ensuring the ventilation effect of the motor. In one embodiment, six opening slots 12 are provided, including three deep slots and three shallow slots. By providing the opening slots 12, the air guide shroud 1 is elastically deformed and opened during installation, and can be closed and tightened after installation, providing a tight enclosure and preventing air leakage. In one embodiment, a chamfer 13 is provided on the inner circumferential side of the opening end of the side wall 2 5 to facilitate fitting with the rear end cover 2.

[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A motor air guide structure, comprising a rear end cover (2), characterized in that, It also includes an air guide shroud (1) sleeved on the outside of the rear end cover (2) and a fan blade (3) disposed between the air guide shroud (1) and the rear end cover (2). The air guide shroud (1) is provided with a cylindrical side wall one (4) and a side wall two (5). One end of the side wall one (4) is connected to the side wall two (5) through a transition surface (6), and the other end is provided with a windproof surface (7). The windproof surface (7) extends from the end of the side wall one (4) toward the axis of the air guide shroud (1) to form an air inlet (8). The side wall two (5) is provided with a plurality of slots (9) circumferentially, and the rear end cover (2) is provided with a plurality of wedge-shaped blocks (10) circumferentially. When the rear end cover (2) is sleeved and connected to the air guide shroud (1), the slots (9) engage with the blocks (10), and the rear end cover (2) is limited by the transition surface (6) and the slots (9).

2. The motor air guide structure according to claim 1, characterized in that, A limiting boss is provided on the inner side of the second side wall (5). The upper end face of the limiting boss is connected to the transition surface (6). When the rear end cover (2) is sleeved and connected to the air guide cover (1), the end face of the rear end cover (2) abuts against the lower end face of the limiting boss, and the rear end cover (2) is limited by the buckle (9) and the limiting boss.

3. The motor air guide structure according to claim 2, characterized in that, The second sidewall (5) is also provided with a plurality of opening grooves (12), which extend axially from the opening end of the second sidewall (5).

4. The motor air guide structure according to claim 3, characterized in that, The opening slot (12) includes several shallow slots and several deep slots. The length of the shallow slot along the axial direction is less than that of the side wall of the rear end cover (2). The length of the deep slot along the axial direction is greater than that of the side wall of the rear end cover (2). The part of the deep slot that is longer than the side wall of the rear end cover (2) can fit and press against the lead wire after the motor lead wire is led out.

5. The motor air guide structure according to claim 3, characterized in that, The inner circumferential side of the opening end of the second side wall (5) is provided with a chamfer (13) which is conducive to fitting with the rear end cover (2).

6. The motor air guide structure according to claim 2, characterized in that, The rear end cover (2) has a shaft hole (14) at the center of its end face for the rotor shaft to pass through. The rear end cover (2) also has several ventilation holes (15) that penetrate the end face and side wall. The rear end cover (2) also has several protrusions (16) on its side wall. The protrusions (16) have bolt holes (17) for screwing with the stator core.

7. The motor air guide structure according to claim 6, characterized in that, The second sidewall (5) is provided with an outer flange (18) that is adapted to the outer protrusion (16).

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