Motor housing structure for heat dissipation

Abstract

The invention discloses a motor casing structure which is convenient for heat dissipation, and relates to the technical field of motors, comprising a casing, wherein an even number of axial straight grooves are evenly arranged on the outer surface of the casing wall, and a direct current channel 1 and a direct current channel 2 which penetrate axially are respectively arranged on the casing wall, the direct current channel 1 is correspondingly arranged on the inner side of the bottom of the straight groove, the direct current channel 2 is arranged between adjacent direct current channels 1, heat dissipation fins are installed on the straight grooves, and circulation drainage end covers are installed at both ends of the casing, the heat dissipation fins comprise a concave shell installed on the straight grooves, a shell cover is installed on the notch of the concave shell, a heat dissipation cavity is formed between the shell cover and the concave shell, a spacer bar 2 which extends into the heat dissipation cavity and faces the bottom of the concave shell is provided on the shell cover, a column cavity is provided on the spacer bar 2, and a branch hole corresponding to the column cavity is provided at the bottom of the concave shell; through the structural arrangement of the heat dissipation fins, the circulation flow stroke of the coolant can be shortened, so that the flow stroke efficiency of the coolant is maximized, thereby improving the cooling efficiency of the casing.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a motor housing structure that is convenient for heat dissipation. Background Art

[0002] With the rapid development of modern industrial technology, motors are core components of various mechanical equipment, and their performance stability and reliability are directly related to the operating efficiency and safety of the entire equipment. However, motors generate a lot of heat during operation. If the heat cannot be dissipated in a timely and effective manner, it will not only cause the motor temperature to rise, affecting its working efficiency and service life, but may even cause safety accidents.

[0003] In the design of the motor's cooling system, the cooling channel affects the maximum heat dissipation efficiency of the motor. At present, the design of cooling channels is mainly divided into two types: spiral and straight slot. The spiral cooling channel can make more effective use of space, achieve uniform distribution of heat and rapid heat dissipation. However, this design also brings complexity to the production process. Due to the tortuous structure of the spiral channel, the inner and outer rings of the motor housing need to be processed separately and welded after processing. This process is not only time-consuming and labor-intensive, but also increases production costs. In addition, due to the presence of welding points, the strength of the outer ring of the housing may be affected to a certain extent, resulting in it being unable to withstand large radial forces.

[0004] Therefore, it is necessary to provide a motor housing structure that is convenient for heat dissipation to solve the problems raised in the above background technology. Summary of the invention

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a motor housing structure that is convenient for heat dissipation, comprising a housing, an outer surface of the housing wall of which is evenly provided with an even number of axial straight grooves, the housing wall of which is respectively provided with a direct current channel one and a direct current channel two that penetrate axially, the direct current channel one being correspondingly arranged on the inner side of the bottom of the straight groove, the direct current channel two being arranged between adjacent direct current channels one, cooling fins being installed on the straight grooves, the cooling fins comprising a concave shell installed on the straight grooves, a shell cover being installed on the notch of the concave shell, a heat dissipation cavity being formed between the shell cover and the concave shell, a partition bar two extending into the heat dissipation cavity and facing the bottom of the concave shell being provided on the shell cover, a column cavity being provided on the partition bar two, a branch hole corresponding to the column cavity being provided at the bottom of the concave shell, an automatic control component for controlling the branch hole being installed on the column cavity, a through hole for connecting the branch hole with the direct current channel one being provided at the bottom of the straight groove, and circulating drainage end covers being installed at both ends of the housing.

[0006] As a preferred technical solution of the present invention, the second partition bar is perpendicular to the bottom of the concave shell and a plurality of the partition bars are arranged in parallel.

[0007] As a preferred technical solution of the present invention, a partition bar 1 is installed at the bottom of the concave shell, which extends into the heat dissipation cavity and faces the shell cover. The partition bar 1 is arranged parallel to the partition bar 2, and the partition bar 1 and the partition bar 2 are arranged alternately. The partition bar 1 and the partition bar 2 separate the heat dissipation cavity to form an S-shaped flow channel.

[0008] As a preferred technical solution of the present invention, a sealing gasket is provided between the circulation drainage end cover and the end of the casing.

[0009] As a preferred technical solution of the present invention, the automatic control component includes a column, a sealing ring is sleeved on the outer side of the upper end of the column, the outer surface of the sealing ring is in close contact with the wall of the column cavity, the upper end of the column is connected to the bottom of the column cavity by a tension spring, and the shell cover is provided with an injection cap connected to the bottom of the column cavity, and the column cavity at the upper end of the column is injected with a mixed gas and liquid that expands and contracts with heat through the injection cap, and the lower end of the column is equipped with a plug that cooperates with the branch hole.

[0010] As a preferred technical solution of the present invention, when the plug is in the initial state, the plug is separated from the branch hole, and the thermal expansion and contraction mixed gas-liquid can expand due to heat to push the column to drive the plug close to the branch hole.

[0011] As a preferred technical solution of the present invention, the branch hole and the plug are both in an inverted cone structure.

[0012] As a preferred technical solution of the present invention, the circulation drainage end covers at both ends are rotated and staggered by an angle between adjacent straight grooves, and the circulation drainage end covers include ring cover 1, ring cover 2, ring cover 3 and ring cover 4 which are stacked in sequence;

[0013] The ring cover 1 is provided with a drainage port 1, a drainage port 2, a drainage port 3 and a drainage port 4, the number of the drainage ports 1, the drainage port 2, the drainage port 3 and the drainage port 4 are respectively arranged in the same manner, the number of the drainage port 1 is half of the number of the straight grooves, the drainage port 1 and the drainage port 3 are respectively used to connect with the heat dissipation cavity, and the drainage port 1 and the drainage port 3 are alternately arranged, and the drainage port 3 is also connected with the direct current channel 1 at its corresponding position, the drainage port 2 and the drainage port 4 are respectively used to connect with the direct current channel 2, and the drainage port 2 and the drainage port 4 are alternately arranged, and the drainage port 2 is also used to connect with the direct current channel 1 at the corresponding position of the drainage port 1;

[0014] The second ring cover is sealed on the side of the first ring cover, and the second ring cover is provided with the same number of through-ports 1 and 2, the number of through-ports 1 is half of the number of straight grooves, the first through-port is used to communicate with the first drainage port, and the second through-port is used to communicate with the fourth drainage port;

[0015] The ring cover 3 is sealed on the side of the ring cover 2, and the ring cover 3 is provided with the same number of through-ports 3 and 4, the number of through-ports 3 is half of the number of straight grooves, the through-port 3 is connected with the through-port 1, and the through-port 4 is used to connect the through-port 2 with the through-port 3;

[0016] The ring cover 4 is sealed on the side of the ring cover 2.

[0017] As a preferred technical solution of the present invention, one of the openings in the ring cover is blocked with a blocking plate, the drainage port 1 at the corresponding position of the blocking plate is connected to the inlet, and the opening 3 at the corresponding position of the blocking plate is connected to the outlet.

[0018] Compared with the prior art, the present invention provides a motor housing structure that is easy to dissipate heat and has the following beneficial effects:

[0019] In the present invention, the cross-sections of DC channel 1 and DC channel 2 are both arranged in an arc-shaped structure. The structural arrangement of DC channel 1 and DC channel 2 can enable the coolant to more comprehensively cover the casing and efficiently absorb the heat of the casing. The partition ridges on the casing between adjacent DC channels 1 and 2 can effectively ensure the structural strength of the casing. DC channel 1 and DC channel 2 are mainly arranged to absorb the heat of the casing, and the heat dissipation fins are mainly arranged to dissipate the heat of the coolant, so that when the coolant passes through DC channel 1 and DC channel 2, after absorbing the heat of the casing, it flows into the heat dissipation fins to dissipate the heat, and through the action of the circulating drainage end cover, the coolant continuously circulates between DC channel 1 and DC channel 2 to absorb and dissipate the heat of the casing.

[0020] In the present invention, when the casing is prepared, the structural designs of the straight groove, direct current channel one and direct current channel two on the casing are all in a straight line form, which is convenient for one-piece molding, making the preparation of the casing more efficient. Ring cover one, ring cover two, ring cover three and ring cover four can all be directly stamped out and assembled in sequence, making the preparation simpler and more efficient.

[0021] In the present invention, the opening and closing of the branch holes are automatically controlled by the cooperation of the self-control component in the heat dissipation fins and the coolant, so that when the coolant flows in the heat dissipation cavity, if the temperature of the coolant reaches the preset value required to absorb heat from the casing, the branch holes can be automatically controlled to open. At this time, the local coolant flowing to the branch hole area in the heat dissipation cavity can be merged into the direct flow channel 1 through the branch holes, thereby shortening the circulation flow of the coolant and improving the cooling efficiency of the casing. When the temperature of the coolant does not reach the preset value required to absorb heat from the casing, the branch holes can be automatically controlled to close. At this time, the circulation flow of the coolant in the heat dissipation cavity reaches a maximum value, and the coolant is fully dissipated through the heat dissipation fins. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the motor housing structure of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the casing in the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the heat dissipation fins in the present invention;

[0025] Figure 4 It is a structural schematic diagram of the automatic control component in the present invention;

[0026] Figure 5 It is a structural schematic diagram of the circulation drainage end cover in the present invention;

[0027] Figure 6 It is a structural schematic diagram of the ring cover 1 in the present invention;

[0028] Figure 7 It is a structural schematic diagram of the ring cover 2 in the present invention;

[0029] Figure 8 It is a structural schematic diagram of the ring cover three in the present invention;

[0030] Fig. 9 Schematic diagram of the structure of the ring cover 4 in the present invention;

[0031] Fig.10 It is a schematic diagram of the local structure of the sealing gasket and the local circulation flow of the circulation drainage end cover in the present invention;

[0032] In the figure: 1, housing; 2, heat sink fins; 3, circulation drainage end cover; 4, sealing gasket; 5, inlet; 6, blocking plate; 7, outlet; 11, direct current channel 1; 12, direct current channel 2; 13, straight groove; 131, through hole; 21, concave shell; 22, shell cover; 23, automatic control component; 24, heat dissipation cavity; 211, spacer bar 1; 212, branch hole; 221, spacer bar 2; 222, column cavity; 231, column; 232. Sealing ring; 233. Tension spring; 234. Plug; 235. Thermal expansion and contraction of mixed gas and liquid; 236. Injection cap; 31. Ring cover one; 32. Ring cover two; 33. Ring cover three; 34. Ring cover four; 311. Drainage port one; 312. Drainage port two; 313. Drainage port three; 314. Drainage port four; 321. Through port one; 322. Through port two; 331. Through port three; 332. Through port four. DETAILED DESCRIPTION

[0033] Reference Figure 1-Figure 10The present invention provides a technical solution: a motor housing structure that is convenient for heat dissipation, comprising a housing 1, wherein an even number of axial straight grooves 13 are evenly arranged on the outer surface of the housing wall of the housing 1, and a direct current channel 11 and a direct current channel 2 12 are respectively arranged on the housing wall of the housing 1, wherein the direct current channel 11 is correspondingly arranged on the inner side of the bottom of the straight groove 13, and the direct current channel 2 12 is arranged between adjacent direct current channels 11, and a heat dissipation fin 2 is installed on the straight groove 13, and the heat dissipation fin 2 comprises a concave shell 21 installed on the straight groove 13, and a shell cover 22 is installed on the notch of the concave shell 21, and a heat dissipation cavity 24 is formed between the shell cover 22 and the concave shell 21, and a partition bar 221 extending into the heat dissipation cavity 24 and facing the bottom of the concave shell 21 is provided on the shell cover 22, and a column cavity 222 is provided on the partition bar 221, and the concave shell 21 is provided with a column cavity 222. The bottom of the shell 21 is provided with a branch hole 212 corresponding to the column cavity 222, and the column cavity 222 is installed with an automatic control component 23 for controlling the branch hole 212. The bottom of the straight groove 13 is provided with a through hole 131 for connecting the branch hole 212 with the direct current channel 1 11, and the two ends of the shell 1 are installed with circulating drainage end covers 3; wherein, the cross-sections of the direct current channel 1 11 and the direct current channel 2 12 are both arranged in an arc-shaped structure, and the structural arrangement of the direct current channel 1 11 and the direct current channel 2 12 can make the coolant more comprehensively cover the shell 1, and can efficiently absorb the heat of the shell 1; the partition ridges on the shell 1 between the adjacent direct current channels 11 and 12 can effectively ensure the structural strength of the shell 1; and when the shell 1 is prepared, for the shell 1 The structural designs of the straight groove 13, the direct current channel 1 11 and the direct current channel 2 12 are all in a straight line form, which is convenient for one-piece molding, making the preparation of the casing 1 more efficient; it should be noted that the direct current channel 1 11 and the direct current channel 2 12 are mainly used to absorb the heat of the casing 1, and the heat dissipation fins 2 are mainly used to dissipate the heat of the coolant, so that when the coolant passes through the direct current channel 1 11 and the direct current channel 2 12, after absorbing the heat of the casing 1, it flows into the heat dissipation fins 2 for heat dissipation, and through the action of the circulation drainage end cover 3, the coolant continues to circulate between the direct current channel 1 11 and the direct current channel 2 12, so as to absorb and dissipate the heat of the casing 1; in addition, through the automatic control component 23 in the heat dissipation fin 2 and the cooling With the cooperation of the coolant, the opening and closing of the branch hole 212 are automatically controlled, so that when the coolant flows in the heat dissipation cavity 24, if the temperature of the coolant reaches the preset value required to absorb the heat of the casing 1, the branch hole 212 can be automatically controlled to open. At this time, the local coolant flowing to the branch hole 212 area in the heat dissipation cavity 24 can be merged into the direct flow channel 11 through the branch hole 212, thereby shortening the coolant circulation flow stroke and improving the cooling efficiency of the casing 1. When the temperature of the coolant does not reach the preset value required to absorb the heat of the casing 1, the branch hole 212 can be automatically controlled to close. At this time, the circulation flow of the coolant in the heat dissipation cavity 24 reaches the maximum value, and the coolant is fully dissipated through the heat dissipation fins 2.

[0034] In this embodiment, the second partition bar 221 is vertically oriented toward the bottom of the concave shell 21, and multiple partition bars are arranged in parallel, so that the coolant flowing in the heat dissipation cavity 24 has a setting formed by multi-stage shortening of the coolant circulation flow, thereby making the coolant absorb the heat of the casing 1 more timely.

[0035] In this embodiment, a partition bar 211 extending into the heat dissipation cavity 24 and facing the shell cover 22 is installed at the bottom of the concave shell 21. The partition bar 211 and the partition bar 221 are arranged in parallel, and the partition bar 211 and the partition bar 221 are arranged alternately. The partition bar 211 and the partition bar 221 separate the heat dissipation cavity 24 to form an S-shaped flow channel.

[0036] In this embodiment, a sealing gasket 4 is provided between the circulation drainage end cover 3 and the end of the casing 1 .

[0037] In this embodiment, the automatic control component 23 includes a column 231, and a sealing ring 232 is sleeved on the outer side of the upper end of the column 231. The outer surface of the sealing ring 232 is in close contact with the wall of the column cavity 222. The upper end of the column 231 is connected to the bottom of the column cavity 222 through a tension spring 233. The shell cover 22 is provided with an injection cap 236 connected to the bottom of the column cavity 222. The column cavity 222 at the upper end of the column 231 is injected with a thermal expansion and contraction mixed gas-liquid 235 through the injection cap 236. The lower end of the column 231 is installed with a plug 234 that cooperates with the branch hole 212. In this embodiment, the thermal expansion and contraction mixed gas-liquid 235 sealed by the injection and the tension spring 233 make the thermal expansion and contraction mixed gas-liquid 235 in a compressed state. When the thermal expansion and contraction mixed gas-liquid 235 is heated by heat transfer, the thermal expansion and contraction mixed gas-liquid 235 can expand in volume. When the force of the volume expansion can overcome When the tension of the stretching spring 233 is overcome, the column 231 can be pushed. When the force of the volume expansion fails to overcome the tension of the stretching spring 233, the column 231 maintains its original position. Since there are different operating modes of driving force when the motor is running, the heat generated by the motor and the heat transferred to the casing 1 will also change accordingly. Therefore, when the coolant flows in the heat dissipation cavity 24, when the coolant passes through the automatic control component 23, if the temperature of the coolant has been cooled by the heat dissipation fins 2 to the preset value required to cool the casing 1, the plug 234 in the automatic control component 23 here will be separated from the branch hole 212. If the temperature of the coolant has not been cooled by the heat dissipation fins 2 to the preset value required to cool the casing 1, the plug 234 in the automatic control component 23 here will be in contact with the branch hole 212 and blocked, so that the heat generated by the motor and transferred to the casing 1 can be automatically controlled to improve the heat dissipation efficiency of the casing 1.

[0038] In the present embodiment, when the plug 234 is in the initial state, the plug 234 is separated from the branch hole 212, and the thermal expansion and contraction mixed gas-liquid 235 can be expanded by heat to push the column 231 to drive the plug 234 close to the branch hole 212, wherein the preparation of the thermal expansion and contraction mixed gas-liquid 235, such as the solution can be a salt solution of an aqueous solution and a gas, and the gas can be air, carbon dioxide and other gases, and is debugged according to the stress of the tension spring 233 and the specific heat transfer gradient of the casing 1, so as to obtain the compression setting of the column cavity 222 where the thermal expansion and contraction mixed gas-liquid 235 is located when the coolant is cooled to the preset value required to cool the casing 1.

[0039] In this embodiment, the branch hole 212 and the plug 234 are both inverted cone structures, so that the thermal expansion and contraction mixed gas-liquid 235 and the tension spring 233 are set in coordination, so that the coolant is cooled to a preset value of the required cooling shell 1 and presents a set range. The lower the preset value of the coolant cooled to the required cooling shell 1, the greater the flow rate of the branch hole 212 opened by the plug 234. The higher the preset value of the coolant cooled to the required cooling shell 1, the smaller the flow rate of the branch hole 212 opened by the plug 234, thereby further improving the heat dissipation efficiency of the shell 1.

[0040] In this embodiment, the circulation drainage end covers 3 at both ends are rotated and staggered by an angle between adjacent straight grooves 13, and the circulation drainage end covers 3 include a ring cover 1 31, a ring cover 2 32, a ring cover 3 33 and a ring cover 4 34 which are stacked in sequence;

[0041] The ring cover 1 31 is provided with a drainage port 1 311, a drainage port 2 312, a drainage port 313 and a drainage port 4 314. The number of the drainage port 1 311, the drainage port 2 312, the drainage port 3 313 and the drainage port 4 314 are respectively arranged in the same manner. The number of the drainage port 1 311 is half of the number of the straight grooves 13. The drainage port 1 311 and the drainage port 3 313 are respectively used to connect to the heat dissipation cavity 24, and the drainage port 1 311 and the drainage port 3 313 are alternately arranged. The drainage port 3 313 is also connected to the direct current channel 1 11 at its corresponding position. The drainage port 2 312 and the drainage port 4 314 are respectively used to connect to the direct current channel 2 12, and the drainage port 2 312 and the drainage port 4 314 are alternately arranged. The drainage port 2 312 is also used to connect to the direct current channel 11 at the corresponding position of the drainage port 1 311.

[0042] The second ring cover 32 blocks the side of the first ring cover 31, and the second ring cover 32 is provided with the same number of through-ports 1 321 and through-ports 2 322, the number of through-ports 1 321 is half of the number of straight grooves 13, the first through-port 321 is used to communicate with the first drainage port 311, and the second through-port 322 is used to communicate with the fourth drainage port 314;

[0043] The third ring cover 33 blocks the side of the second ring cover 32, and the third ring cover 33 is provided with the same number of third openings 331 and fourth openings 332. The number of the third openings 331 is half of the number of the straight grooves 13. The third opening 331 is connected with the first opening 321, and the fourth opening 332 is used to connect the second opening 322 with the third opening 331.

[0044] The ring cover 4 34 is sealed on the side of the ring cover 2 32;

[0045] In this embodiment, the ring cover 1 31 , the ring cover 2 32 , the ring cover 33 and the ring cover 4 34 can all be obtained by direct stamping and are sequentially stacked and assembled, making the preparation simpler and more efficient.

[0046] In this embodiment, a through-port 1 321 in the ring cover 2 32 is blocked with a blocking plate 6, a drainage port 1 311 at a position corresponding to the blocking plate 6 is connected to an inlet 5, and a through-port 3 331 at a position corresponding to the blocking plate 6 is connected to an outlet 7. In this embodiment, for example, the number of straight grooves 13 is set to 12, so that the two circulation drainage end covers 3 and the housing 1 form an S-shaped overall circulation heat dissipation flow channel, and the overall circulation heat dissipation flow channel has 6 repeated circulation branch heat dissipation flow channels, and the flow trajectory of one circulation branch heat dissipation flow channel in one circulation drainage end cover 3 is as follows: Fig.10 As shown by the blank arrow in the figure, the other circulation drainage end cap 3 is connected to Fig.10 The circulation drainage end cover 3 shown is rotated and staggered by an angle between two adjacent straight grooves 13, and the flow track in the other circulation drainage end cover 3 is not shown. Fig.10 For example, by setting the blocking plate 6, the inlet 5 and the outlet 7, the coolant can be driven to circulate in the overall circulating heat dissipation channel.

[0047] In specific implementation, it includes the following steps:

[0048] Step 1: As the heat transfer of the housing 1 made of different materials is different, the housing 1, the heat dissipation fins 2, the circulation drainage end cover 3 and the sealing gasket 4 are assembled;

[0049] Step 2: inject the thermal expansion and contraction gas-liquid mixture 235, and monitor the temperature of the local area of ​​the heat dissipation cavity 24 corresponding to each thermal expansion and contraction gas-liquid mixture 235, and monitor the displacement of each column 231;

[0050] Step 3: performing a heating simulation on the housing 1 and starting the circulation of the coolant;

[0051] Step 4, obtain the temperature value of the coolant in each area corresponding to the thermal expansion and contraction mixed gas-liquid 235 and the displacement of the column 231, and determine whether the monitored temperature of the coolant reaches the required temperature to cool the casing 1 when the displacement of the column 231 changes; if not, adjust the compression degree of the column cavity 222 where the thermal expansion and contraction mixed gas-liquid 235 is located, and perform step 3 again until the monitored temperature of the coolant reaches the required temperature to cool the casing 1, completing the adjustment of the compression degree of the column cavity 222 where the thermal expansion and contraction mixed gas-liquid 235 is located when the coolant reaches the preset value required to cool the casing 1.

[0052] The above description is only a preferred specific implementation manner of the invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the invention, which should be covered by the protection scope of the present invention.

Claims

1. A motor housing structure that facilitates heat dissipation, comprising a housing (1), characterized in that: An even number of axial straight grooves (13) are evenly arranged on the outer surface of the shell wall of the casing (1), and a first direct current channel (11) and a second direct current channel (12) are respectively arranged on the shell wall of the casing (1) so as to penetrate axially. The first direct current channel (11) is arranged on the inner side of the bottom of the straight groove (13), and the second direct current channel (12) is arranged between adjacent first direct current channels (11). A heat dissipation fin (2) is installed on the straight groove (13), and the heat dissipation fin (2) comprises a concave shell (21) installed on the straight groove (13), and a shell cover (22) is installed on the notch of the concave shell (21), and the shell cover (22) and the concave shell (21) are connected. A heat dissipation cavity (24) is formed between the housing (22), a second partition bar (221) extending into the heat dissipation cavity (24) and facing the bottom of the concave housing (21) is provided on the housing cover (22), a column cavity (222) is provided on the second partition bar (221), a branch hole (212) corresponding to the column cavity (222) is provided at the bottom of the concave housing (21), an automatic control component (23) for controlling the branch hole (212) is installed on the column cavity (222), a through hole (131) for connecting the branch hole (212) with the first direct current channel (11) is provided at the bottom of the straight groove (13), and circulation drainage end covers (3) are installed at both ends of the housing (1); The automatic control component (23) comprises a column (231), the upper end of the column (231) is covered with a sealing ring (232) on the outer side, the outer surface of the sealing ring (232) is in close contact with the wall of the column cavity (222), the upper end of the column (231) is connected to the bottom of the column cavity (222) via a tension spring (233), the shell cover (22) is provided with an injection cap (236) connected to the bottom of the column cavity (222), the column cavity (222) at the upper end of the column (231) is injected with a thermal expansion and contraction mixed gas and liquid (235) via the injection cap (236), and the lower end of the column (231) is provided with a plug (234) that cooperates with the branch hole (212).

2. A motor housing structure that facilitates heat dissipation according to claim 1, characterized in that: The second partition bar (221) is vertically oriented toward the bottom of the concave shell (21), and a plurality of partition bars are arranged in parallel.

3. The motor housing structure for facilitating heat dissipation according to claim 1, characterized in that: The bottom of the concave shell (21) is provided with a partition bar 1 (211) extending into the heat dissipation cavity (24) and facing the shell cover (22); the partition bar 1 (211) and the partition bar 2 (221) are arranged in parallel, and the partition bar 1 (211) and the partition bar 2 (221) are arranged alternately; the partition bar 1 (211) and the partition bar 2 (221) separate the heat dissipation cavity (24) to form an S-shaped flow channel.

4. The motor housing structure for facilitating heat dissipation according to claim 1, characterized in that: A sealing gasket (4) is provided between the circulation drainage end cover (3) and the end of the casing (1).

5. The motor housing structure for facilitating heat dissipation according to claim 1, characterized in that: When the plug (234) is in the initial state, the plug (234) is separated from the branch hole (212), and the thermally expanding and contracting mixed gas-liquid (235) can expand due to heat to push the column (231) to drive the plug (234) close to the branch hole (212).

6. The motor housing structure for facilitating heat dissipation according to claim 1, characterized in that: The branch hole (212) and the plug (234) both have an inverted cone structure.

7. The motor housing structure for facilitating heat dissipation according to claim 1, characterized in that: The circulation drainage end covers (3) at both ends are rotated and offset by an angle between adjacent straight grooves (13), and the circulation drainage end covers (3) include a ring cover 1 (31), a ring cover 2 (32), a ring cover 3 (33) and a ring cover 4 (34) which are sequentially stacked. The ring cover 1 (31) is provided with a drainage port 1 (311), a drainage port 2 (312), a drainage port 3 (313) and a drainage port 4 (314). The number of the drainage port 1 (311), the drainage port 2 (312), the drainage port 3 (313) and the drainage port 4 (314) are respectively arranged in the same manner. The number of the drainage port 1 (311) is half of the number of the straight grooves (13). The drainage port 1 (311) and the drainage port 3 (313) are respectively used to connect the heat dissipation The cavity (24) is provided with drainage port 1 (311) and drainage port 3 (313) alternately, drainage port 3 (313) is also connected to direct flow channel 1 (11) at its corresponding position, drainage port 2 (312) and drainage port 4 (314) are respectively used to connect to direct flow channel 2 (12), and drainage port 2 (312) and drainage port 4 (314) are alternately provided, and drainage port 2 (312) is also used to connect to direct flow channel 1 (11) at the corresponding position of drainage port 1 (311); The second ring cover (32) blocks the side of the first ring cover (31), and the second ring cover (32) is provided with the same number of first openings (321) and second openings (322), the number of first openings (321) is half the number of straight grooves (13), the first openings (321) are used to communicate with the first drainage port (311), and the second openings (322) are used to communicate with the fourth drainage port (314); The ring cover three (33) blocks the side of the ring cover two (32), and the ring cover three (33) is provided with the same number of through openings three (331) and through openings four (332), the number of through openings three (331) is half the number of straight grooves (13), the through opening three (331) is communicated with the through opening one (321), and the through opening four (332) is used to connect the through opening two (322) with the through opening three (331); The ring cover four (34) seals the side of the ring cover two (32).

8. The motor housing structure for facilitating heat dissipation according to claim 7, characterized in that: A blocking plate (6) is provided on a through-port 1 (321) in the second ring cover (32), a flow inlet 1 (311) at a position corresponding to the blocking plate (6) is connected to a flow inlet (5), and a through-port 3 (331) at a position corresponding to the blocking plate (6) is connected to a flow outlet (7).

Images