A water-cooled housing for a direct-drive motor and the direct-drive motor itself.

Abstract

A water-cooled housing for a direct-drive motor includes a water-cooling jacket, multiple elastic seals, and two end caps. The water-cooling jacket has internal flow channels that extend axially and penetrate both ends of the water-cooling jacket. Multiple internal flow channels are spaced circumferentially. Each internal flow channel includes an input channel, an output channel, and multiple intermediate channels located between the input and output channels. Each intermediate channel has connecting grooves at both ends that communicate with two adjacent internal flow channels. The openings of these connecting grooves are located on the end faces of the water-cooling jacket. The openings of each connecting groove, the input channel, and the output channel, away from their connecting grooves, are radially expanded outwards to form receiving grooves. Each receiving groove is sealed with an elastic seal. The two end caps respectively cover both ends of the water-cooling jacket and abut against the corresponding elastic seals on the end faces. This invention also provides a direct-drive motor using the above-described water-cooled housing. Compared with the prior art, the water-cooled housing of this invention is easier to process and has a better sealing effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of water-cooled housing for direct drive motors, specifically relating to a water-cooled housing for a direct drive motor and a direct drive motor using the water-cooled housing. Background Technology

[0002] During motor operation, significant heat is generated internally at high speeds, which severely impacts the motor's electromagnetic performance and lifespan. To cool the motor, a water-cooled direct-drive motor, as disclosed in publication CN117895698A, is used. This motor features a water-cooling jacket with an S-shaped flow channel on its outer wall, allowing water to flow along the channel and cool the motor. However, this S-shaped structure is difficult to manufacture and requires a seal with the housing, demanding high precision in the fit between the water-cooling jacket and the housing. Furthermore, conventional assembly methods require heating and expanding the housing to fit over the water-cooling jacket, then allowing it to cool and shrink before tightening it to ensure a seal. This assembly method is cumbersome, time-consuming, and inefficient. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a water-cooled housing for a direct-drive motor.

[0004] To achieve the above objectives, this utility model discloses a water-cooled housing for a direct-drive motor, comprising a water-cooled jacket, multiple elastic seals, and two end caps;

[0005] The water cooling jacket is provided with an inner flow channel, which extends axially and passes through both ends of the water cooling jacket. There are multiple inner flow channels, which are spaced apart circumferentially.

[0006] The multiple inner flow channels include an input flow channel, an output flow channel, and multiple intermediate flow channels located between the input flow channel and the output flow channel. Each intermediate flow channel has a connecting groove at both ends that communicates with two adjacent inner flow channels. The opening of the connecting groove is located on the end face of the water cooling jacket. The opening of each connecting groove, the port of the input flow channel and the output flow channel away from their connecting groove are radially expanded outward to form a receiving groove. Each receiving groove is sealed with an elastic sealing element.

[0007] The two end caps respectively cover the two ends of the water-cooling jacket and abut against the elastic seals on the corresponding end faces.

[0008] Furthermore, the outer wall of the water-cooling jacket is provided with an inlet and an outlet, which are respectively connected to the input flow channel and the output flow channel.

[0009] Furthermore, both the input port and the output port are connected to connectors.

[0010] Furthermore, the input port and the output port are spaced apart circumferentially, and a clearance area is formed between them.

[0011] Furthermore, the multiple internal flow channels also include avoidance flow channels, which are opposite to the avoidance area.

[0012] Furthermore, the end cap includes a cover plate and an annular pressing member, one end of which is connected to the end cap, and the other end of which covers the end face of the water cooling jacket and abuts against the elastic seal of the end face.

[0013] Furthermore, the bottom inner side of the annular pressing component is provided with an annular locking block, which is locked inside the water cooling jacket and abuts against the inner wall of the water cooling jacket.

[0014] Furthermore, the bottom of the annular pressing member is provided with an annular groove, the annular groove is located inside the elastic seal, and a sealing ring is provided in the annular groove.

[0015] This invention also provides a direct drive motor using the water-cooled housing of the aforementioned direct drive motor.

[0016] A direct drive motor includes a housing, a stator disposed within the housing, a rotating shaft, and a rotor core disposed on the rotating shaft, wherein the housing is a water-cooled housing of the direct drive motor described in any of the preceding claims.

[0017] Furthermore, the stator is interference-fitted into the water-cooling jacket.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] The internal flow channel inside the water-cooling jacket extends axially, which is simpler in structure and easier to process compared to the traditional S-shaped flow channel on the outer wall (curved surface).

[0020] Each connecting slot, the inlet of the inlet channel, and the outlet channel of the outlet channel are radially expanded outward to form a receiving slot. Each receiving slot is sealed with an elastic seal. When the end cap is closed on the end face of the water cooling jacket, the end cap presses against the elastic seal, thereby completely sealing both ends of the inner channel and ensuring the sealing performance of the inner channel.

[0021] By setting a receiving groove on the water cooling jacket, installing a seal in the receiving groove, and achieving a seal under the action of the end cap, the sealing performance can be guaranteed. On the other hand, compared with the sealing structure of setting a seal on the end cap and fixing it to the receiving groove, the end cap structure is simpler and easier to process. Moreover, when the sealing performance is reduced, the elastic seal can be replaced, thus improving the long-term reliability of the sealing performance. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the water-cooled housing of the direct-drive motor in an embodiment.

[0023] Figure 2 for Figure 1 A top view of the water-cooled housing of a direct-drive motor;

[0024] Figure 3 for Figure 2 A cross-sectional view of the AA plane;

[0025] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle;

[0026] Figure 5 A three-dimensional exploded view of the water-cooling jacket and elastic seal;

[0027] Figure 6 This is a top view of the water-cooling jacket;

[0028] Figure 7 for Figure 6 A magnified view of a portion of point B in the middle;

[0029] Figure 8 This is a three-dimensional structural diagram of the end cap;

[0030] Water cooling jacket 100; inner flow channel 110; inlet flow channel 111; outlet flow channel 112; intermediate flow channel 113; clearance flow channel 114; connecting groove 120; receiving groove 130; inlet port 140; outlet port 150; clearance area 160; clearance opening 161;

[0031] 200 elastic seals;

[0032] End cap 300; cover plate 310; annular pressing part 320; annular locking block 321; annular groove 322;

[0033] Connector 400;

[0034] 500 sealing ring;

[0035] Stator 610; Shaft 620; Rotor core 630. Detailed Implementation

[0036] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] A water-cooled housing for a direct-drive motor, see [link / reference] Figures 1-8 It includes a cylindrical water cooling jacket 100, multiple sheet-like elastic seals 200 (e.g., seals made of resin material) and two end caps 300.

[0038] The water-cooling jacket 100 is provided with an inner flow channel 110, which extends axially and passes through both ends of the water-cooling jacket 100. The axial direction refers to the axis of the water-cooling jacket 100, and the following axial direction refers to the circumferential direction of the water-cooling jacket 100. There are multiple inner flow channels 110, which are arranged at intervals along the circumference. The multiple inner flow channels 110 include an input flow channel 111, an output flow channel 112, and multiple intermediate flow channels 113 located between the input flow channel 111 and the output flow channel 112. Each intermediate flow channel 113 has a connecting groove 120 at both ends, and the connecting groove 120 at both ends of each inner flow channel 110 is connected to two adjacent inner flow channels 110 respectively. Specifically, the inner flow channel 110 located in the middle position has two adjacent flow channels 113. The intermediate flow channel 113 adjacent to the input flow channel 111 and the output flow channel 112 has two adjacent inner flow channels 110: the intermediate flow channel 113 and the input flow channel 111 / output flow channel 112. The ends of the input flow channel 111 and the output flow channel 112 away from their connecting groove 120 are blocked, and these ends do not communicate with other inner flow channels 110. In this embodiment, an input port 140 and an output port 150 are provided on the outer wall of the water cooling jacket 100. The input port 140 and the output port 150 are respectively connected to the input flow channel 111 and the output flow channel 112, ultimately forming a circulation loop. The opening of the connecting groove 120 is located on the end face of the water cooling jacket 100, a position convenient for machining the connecting groove 120. Each connecting groove 120 has its opening radially expanded outward to form a receiving groove 130. The ports of the input flow channel 111 and the output flow channel 112, away from their connecting groove 120, also radially expand outward to form receiving grooves 130. Each receiving groove is internally sealed with an elastic sealing element 200, thereby sealing and blocking both ends of the inner flow channel 110. Two end caps 300 respectively cover both ends of the water cooling jacket 100 and abut against the elastic sealing elements 200 on the corresponding end faces.

[0039] In the above-described water-cooled housing, the inner flow channel 110 within the water-cooling jacket 100 extends axially. Compared to the traditional S-shaped flow channel on the outer wall (curved surface), this structure is simpler and easier to manufacture. By providing a receiving groove 130 on the water-cooling jacket 100, a sealing element is installed in the receiving groove 130, and a seal is achieved under the action of the end cap 300. This ensures sealing performance. Furthermore, compared to a sealing structure where the end cap 300 has a seal clipped into the receiving groove 130, the end cap 300 structure is simpler and easier to manufacture. Moreover, when the sealing performance deteriorates, the elastic seal can be replaced, improving the long-term reliability of the sealing performance. The inlet 140 and outlet 150 are located on the outer wall of the water-cooling jacket 100, which avoids affecting the sealing performance of the inner flow channel 110 ports due to their placement on the end face.

[0040] In this embodiment, both the inlet 140 and the outlet 150 are connected to connectors 400, which facilitates connection to external water pipes. The connectors 400 and the water-cooling jacket 100 are sealed with sealant or similar materials.

[0041] In this embodiment, the input port 140 and the output port 150 are arranged circumferentially and a clearance area 160 is formed between them. When interference occurs during the assembly of the motor, the clearance area 160 can be cut to form a clearance opening 161 to facilitate installation.

[0042] In practice, the water-cooling jacket 100 is formed by extrusion molding, then cut to size, and further processed on the end face to create structures such as the connecting groove 120, receiving groove 130, inlet 140, and outlet 150. The internal flow channel 110 within the water-cooling jacket 100 is pre-designed, so when cutting is required in the clearance area 160, it can be cut to the internal clearance flow channel 114. Since the ports of the inlet flow channel 111 and the outlet flow channel 112 far from their connecting groove 120 are sealed, cutting out the clearance port 161 will not affect the water-cooled flow channels.

[0043] In this embodiment, the two end caps 300 have identical structures. Taking one as an example: the end cap 300 includes a cover plate 310 and an annular pressing member 320. The cover plate 310 is a flat plate, and one end of the annular pressing member 320 is connected to the end cap 300. Specifically, the annular pressing member 320 and the cover plate 310 bracket are fixed to the end face of the water cooling jacket 100 by screws. The other end cap 300 of the annular pressing member 320 fits into the end face of the water cooling jacket 100 and abuts against the elastic sealing member 200 of that end face.

[0044] Among them, the bottom inner side of the annular pressing component 320 is provided with an annular locking block 321. The annular locking block 321 is locked inside the water cooling jacket 100 and abuts against the inner wall of the water cooling jacket 100. This not only improves the connection stability and reliability of the annular pressing component 320, but also further improves the sealing effect between the water cooling jacket 100 and the pressing component.

[0045] Furthermore, the bottom of the annular pressing member 320 is provided with an annular groove 322, which is located inside the elastic seal 200. A sealing ring 500 is provided inside the annular groove 322. This further improves the sealing effect and greatly prevents cooling water from flowing into the water cooling jacket 100 (inside the motor). No sealing structure is provided on the bottom surface of the annular pressing member 320 outside the elastic seal 200 because the elastic seal 200 already provides sufficient sealing performance. Moreover, since this position is on the outside, even if a very small amount of cooling water leaks out, it will not affect the use of the motor. This saves on sealing structures, reduces costs, and also facilitates the processing of the annular pressing member 320.

[0046] This embodiment provides a direct drive motor using the water-cooled housing of the above-mentioned direct drive motor, including a housing and a stator 610, a rotating shaft 620 and a rotor core 630 disposed within the housing, the housing being the water-cooled housing of the above-mentioned direct drive motor.

[0047] The stator is interference-fitted into the water-cooling jacket 100, so that the heat generated by the stator can be transferred to the water-cooling jacket 100, thereby improving the cooling effect.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A water-cooled housing for a direct-drive motor, characterized in that: Includes a water-cooling jacket, multiple flexible seals, and two end caps; The water cooling jacket is provided with an inner flow channel, which extends axially and passes through both ends of the water cooling jacket. There are multiple inner flow channels, which are spaced apart circumferentially. The multiple inner flow channels include an input flow channel, an output flow channel, and multiple intermediate flow channels located between the input flow channel and the output flow channel. Each intermediate flow channel has a connecting groove at both ends that communicates with two adjacent inner flow channels. The opening of the connecting groove is located on the end face of the water cooling jacket. The opening of each connecting groove, the port of the input flow channel and the output flow channel away from their connecting groove are radially expanded outward to form a receiving groove. Each receiving groove is sealed with an elastic sealing element. The two end caps respectively cover the two ends of the water-cooling jacket and abut against the elastic seals on the corresponding end faces.

2. The water-cooled housing of the direct-drive motor according to claim 1, characterized in that: The outer wall of the water-cooling jacket is provided with an inlet and an outlet, which are respectively connected to the input flow channel and the output flow channel.

3. The water-cooled housing of the direct-drive motor according to claim 2, characterized in that: Both the input port and the output port are connected to connectors.

4. The water-cooled housing of the direct-drive motor according to claim 2, characterized in that: The input port and output port are spaced apart circumferentially, and a clearance area is formed between them.

5. The water-cooled housing of the direct-drive motor according to claim 4, characterized in that: The multiple internal flow channels also include a clearance flow channel, which is opposite to the clearance area.

6. The water-cooled housing of the direct-drive motor according to claim 1, characterized in that: The end cap includes a cover plate and an annular pressing member. One end of the annular pressing member is connected to the end cap, and the other end of the annular pressing member covers the end face of the water cooling jacket and abuts against the elastic seal of the end face.

7. The water-cooled housing of the direct-drive motor according to claim 6, characterized in that: The bottom inner side of the annular pressing component is provided with an annular locking block, which is locked inside the water cooling jacket and abuts against the inner wall of the water cooling jacket.

8. The water-cooled housing of the direct-drive motor according to claim 6, characterized in that: The bottom of the annular pressing member is provided with an annular groove, which is located inside the elastic seal and a sealing ring is provided inside the annular groove.

9. A direct-drive motor, comprising a housing, a stator disposed within the housing, a shaft, and a rotor core disposed on the shaft, characterized in that: The housing is the water-cooled housing of the direct-drive motor as described in any one of claims 1-8.

10. The direct-drive motor according to claim 9, characterized in that: The stator is interference-fitted inside the water-cooling jacket.

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