Motor heat dissipation structure

Abstract

The utility model provides a motor heat radiation structure comprising a motor main body, a housing sleeved on the motor main body, and a first heat radiation part and a second heat radiation part respectively arranged at two ends of the housing. The first heat dissipation part comprises a mounting frame arranged at one end of the shell and a heat dissipation groove formed in the mounting frame, a plurality of first heat dissipation holes distributed in the circumferential direction of the heat dissipation groove are formed in the heat dissipation groove, and an air inlet assembly is arranged on the heat dissipation groove; the second heat dissipation part comprises a boss arranged at the other end of the shell, and a plurality of second heat dissipation holes are formed in the boss in the circumferential direction of the boss; working gas can flow through the first heat dissipation holes through the gas inlet assembly, exchanges heat with the motor body and then flows out through the second heat dissipation holes. The heat dissipation structure of the motor is beneficial for improving the heat dissipation effect of the motor, thereby ensuring the normal operation of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and particularly relates to a motor heat dissipation structure. Background Technique

[0002] A motor can be used as an electric motor or an engine. Its working principle is that an energized coil rotates in a magnetic field to drive the rotor to rotate. The motor has the characteristics of compact structure, high efficiency and reliable operation, and is widely used. With the continuous increase of the motor power, the temperature rise of the motor also increases. Generally, the temperature rise of the motor is caused by the heat generated by the winding. Overheating of the motor will affect its performance.

[0003] At present, motors usually use a metal shell for heat dissipation, and the heat generated is conducted to the air through the outer shell surface. However, the heat dissipation path of traditional motors is relatively fixed and it is not easy to discharge heat. Therefore, under long-term high-load operation, heat accumulation may cause the motor to overheat, which is not conducive to ensuring the normal operation of the motor. Content of the Utility Model

[0004] In view of this, the utility model aims to propose a motor heat dissipation structure to facilitate ensuring the normal operation of the motor.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A motor heat dissipation structure includes a motor main body, a housing sleeved on the motor main body, and a first heat dissipation part and a second heat dissipation part respectively arranged at both ends of the housing;

[0007] The first heat dissipation part includes a mounting bracket arranged at one end of the housing, and heat dissipation grooves arranged on the mounting bracket. A plurality of first heat dissipation holes are arranged along the circumferential direction of the heat dissipation grooves, and an air intake assembly is buckled on the heat dissipation grooves; the second heat dissipation part includes a boss arranged at the other end of the housing, and a plurality of second heat dissipation holes arranged along the circumferential direction of the boss;

[0008] Working gas can flow through each of the first heat dissipation holes through the air intake assembly, exchange heat with the motor main body, and then flow out through each of the second heat dissipation holes.

[0009] Further, the air intake assembly includes a dust-proof cover arranged in the heat dissipation groove, and an air intake nozzle extending outward along the end of the dust-proof cover. The dust-proof cover is used to cover each of the first heat dissipation holes.

[0010] Further, the motor main body includes a rotating shaft, a rotor sleeved on the rotating shaft, and a stator arranged on the inner wall of the housing. The stator is used to drive the rotor to rotate;

[0011] The rotor includes a rotor body, and a gas flow passage is formed between the rotor body and the stator, and the gas flow passage is arranged to extend along the axial direction of the housing.

[0012] Further, a crankshaft is sleeved on one end of the rotating shaft close to the boss, and a balance member and a first bearing are sequentially sleeved on the crankshaft from top to bottom, and the balance member is used to eliminate the dynamic unbalance state of the motor.

[0013] Further, the stator includes a plurality of magnets arranged at circumferential intervals along the rotor body, and a fixing clip is provided between two adjacent magnets, and the fixing clip is used to fix the corresponding magnet.

[0014] Further, the boss includes a connecting portion that is in interference fit with the housing, a large-diameter groove provided on the connecting portion and extending along the height direction of the housing, and a small-diameter groove provided at the bottom of the large-diameter groove and extending along the height direction of the housing, and the small-diameter groove is used to fix the first bearing.

[0015] Further, a plurality of the second heat dissipation holes are provided at the bottom of the large-diameter groove, and when the balance member rotates around the crankshaft in the large-diameter groove, part of the second heat dissipation holes can be blocked.

[0016] Further, a first central hole that is in fit and inserted with the rotating shaft is provided at the central position of the mounting bracket; and / or,

[0017] A second central hole that is in fit and inserted with the crankshaft is provided at the central position of the small-diameter groove.

[0018] Further, a sealing member is provided between the dust-proof cover and the heat dissipation groove, and the sealing member is used to prevent the working gas from leaking out.

[0019] Further, a second bearing is sleeved on the end of the rotating shaft away from the crankshaft, and a bearing cavity is provided at the bottom of the mounting bracket, and the second bearing is in interference connection in the bearing cavity.

[0020] Compared with the prior art, the present utility model has the following advantages:

[0021] In the motor heat dissipation structure of the present utility model, through the cooperation setting among the first heat dissipation holes in the first heat dissipation part, the air intake assembly, and the second heat dissipation holes in the second heat dissipation part, the working gas can flow through the inside of the motor and exchange heat with the inside of the motor, thereby effectively improving the heat dissipation effect inside the motor and ensuring the normal operation of the motor.

[0022] Secondly, the dust cover can prevent external debris from entering the motor through the first heat dissipation holes, ensuring the normal operation of the motor. The gas flow path formed between the rotor main body and the stator facilitates the flow of the working gas, thereby facilitating heat exchange with the rotor main body. By providing a crankshaft, the stability and efficiency of the motor operation can be improved, and a balancing member is sleeved on the crankshaft, which helps to eliminate the dynamic unbalance state of the motor, thus prolonging the service life of the motor.

[0023] Furthermore, the stator consists of a magnet and a fixing clip, with a simple structure. Under the magnetic tendency of the magnet, the stable rotation of the rotor can be achieved. At the same time, under the action of the fixing clip, the stability of the magnet can be enhanced. The interference fit between the connecting part and the housing enables the convenient installation between the boss and the housing, with a simple structure and easy design and implementation. At the same time, through the setting of the small-diameter groove, the first bearing can be fixed to prevent the first bearing from disengaging.

[0024] Moreover, the balancing member is rotatably arranged in the large-diameter groove, which can block part of the second heat dissipation holes, thereby enhancing the flow rate of the working gas. Through the setting of the first central hole and the second central hole, it is conducive to the insertion of the rotating shaft and the crankshaft. A sealing member is arranged between the dust cover and the heat dissipation groove, facilitating the sealing of the heat dissipation groove and preventing the working gas from flowing out from the connection between the dust cover and the heat dissipation groove. By providing a bearing cavity, the second bearing is fixed to the bearing cavity through interference fit, effectively preventing the second bearing from disengaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0026] Figure 1 is a schematic diagram of the overall structure of the motor heat dissipation structure according to the embodiment of the present utility model;

[0027] Figure 2 is Figure 1 a cross-sectional view taken along the line A-A in

[0028] Figure 3 is Figure 2 an enlarged view of part B in

[0029] Figure 4 is a schematic diagram of a partial structure of the motor heat dissipation structure according to the embodiment of the present utility model;

[0030] Figure 5 is a schematic diagram of the structure of the stator according to the embodiment of the present utility model;

[0031] Figure 6Schematic structural diagram of the balancing member according to an embodiment of the present utility model;

[0032] Figure 7 Exploded view of the mounting bracket and the intake assembly according to an embodiment of the present utility model;

[0033] Figure 8 Schematic structural diagram of the mounting bracket according to an embodiment of the present utility model;

[0034] Figure 9 is Figure 8 Schematic structural diagram of the structure shown in another perspective;

[0035] Figure 10 Schematic structural diagram of the boss according to an embodiment of the present utility model;

[0036] Explanation of reference numerals:

[0037] 1. Motor main body; 11. Rotating shaft; 111. Crankshaft; 1111. Balancing member; 1112. First bearing; 12. Rotor; 121. Rotor main body; 1211. Iron core; 1212. Iron core pad; 1213. Coil; 13. Stator; 131. Magnet; 132. Fixed clamp; 14. Gas flow channel;

[0038] 2. Housing;

[0039] 3. First heat dissipation part; 31. Mounting bracket; 311. First central hole; 312. Bearing cavity; 3121. Second bearing; 313. Wiring terminal; 314. Carbon brush holder assembly; 32. Heat dissipation groove; 321. First heat dissipation hole; 322. Sealing member; 33. Intake assembly; 331. Dust cover; 332. Intake nozzle;

[0040] 4. Second heat dissipation part; 41. Boss; 411. Connecting part; 412. Large-diameter groove; 4121. Second heat dissipation hole; 413. Small-diameter groove; 4131. Second central hole. Detailed implementation manners

[0041] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other.

[0042] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, if terms such as "first" and "second" appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0043] Taking the motor heat dissipation structure described in the present utility model as an example, the orientation words such as "upper, lower, left, right, front, and back" used in the embodiments are based on Figure 1 the up-down direction (also known as the height direction or the overall Z direction), the left-right direction (also known as the width direction or the overall Y direction), and the front-back direction (also known as the length direction or the overall X direction) in the state shown.

[0044] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0045] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0046] Embodiment 1

[0047] This embodiment relates to a motor heat dissipation structure, which is beneficial to improving the heat dissipation effect of the motor, thereby ensuring the normal operation of the motor. In terms of the overall structure, as Figures 1 to 10 shown in the figure, the motor heat dissipation structure of this embodiment includes a motor main body 1, a housing 2 sleeved on the motor main body 1, and a first heat dissipation part 3 and a second heat dissipation part 4 respectively arranged at both ends of the housing 2.

[0048] Among them, as Figure 8 and Figure 10 shown in the figure, the first heat dissipation part 3 includes a mounting frame 31 arranged at one end of the housing 2, and heat dissipation grooves 32 arranged on the mounting frame 31. A plurality of first heat dissipation holes 321 are arranged along the circumferential direction of the heat dissipation grooves 32, and an air intake component 33 is buckled on the heat dissipation grooves 32. The second heat dissipation part 4 includes a boss 41 arranged at the other end of the housing 2, and a plurality of second heat dissipation holes 4121 arranged along the circumferential direction of the boss 41.

[0049] The working gas can flow through each first heat dissipation hole 321 through the air intake component 33, exchange heat with the motor main body 1, and then flow out through each second heat dissipation hole 4121.

[0050] At this time, with the above settings, through the cooperation of the first heat dissipation holes 321 in the first heat dissipation part 3, the air intake component 33, and the second heat dissipation holes 4121 in the second heat dissipation part 4, the working gas can flow through the motor interior and exchange heat with the motor interior, thereby effectively improving the heat dissipation effect inside the motor and ensuring the normal operation of the motor.

[0051] Here, the number of the first heat dissipation holes 321 in this embodiment can be set to four, and the number of the second heat dissipation holes 4121 can be set to eight. Of course, the specific numbers of the first heat dissipation holes 321 and the second heat dissipation holes 4121 can also be designed and adjusted according to the actual heat dissipation requirements of the motor. For example, the number of the first heat dissipation holes 321 can also be set to three or five, etc., and the number of the second heat dissipation holes 4121 can also be set to seven or nine, etc.

[0052] It is worth mentioning that the working gas in this embodiment can adopt cooling gases well-known to those skilled in the art, such as air, carbon dioxide, etc.

[0053] Based on the above overall introduction, in this embodiment, as a preferred implementation form, referring to Figure 1 and Figure 7 as shown, the air intake assembly 33 includes a dust-proof cover 331 disposed in the heat dissipation groove 32, and an air intake nozzle 332 extending outward along the end of the dust-proof cover 331. The dust-proof cover 331 is used to cover each of the first heat dissipation holes 321. Here, the arrangement of the dust-proof cover 331 can prevent foreign matters from entering the motor through the first heat dissipation holes 321, ensuring the normal operation of the motor.

[0054] Specifically, in this embodiment, as a preferred implementation form, as Figure 2 and Figure 4 shown, the motor main body 1 includes a rotating shaft 11, a rotor 12 sleeved on the rotating shaft 11, and a stator 13 disposed on the inner wall of the housing 2. The stator 13 is used to drive the rotor 12 to rotate.

[0055] Meanwhile, referring to Figure 2 and Figure 3 as shown, the rotor 12 includes a rotor main body 121. A gas flow channel 14 is formed between the rotor main body 121 and the stator 13, and the gas flow channel 14 extends along the axial direction of the housing 2. Thus, through the arrangement of the gas flow channel 14 formed between the rotor main body 121 and the stator 13, it is convenient for the working gas to flow through, and thus it is beneficial to perform heat exchange on the rotor main body 121.

[0056] During specific implementation, the working gas can enter the heat dissipation groove 32 from the air intake nozzle 332, pass through each of the first heat dissipation holes 321 and flow into the gas flow channel 14, perform heat exchange on the rotor main body 121, and after the heat exchange is completed, flow out from each of the second heat dissipation holes 4121 to complete the cooling and heat dissipation of the rotor main body 121, so as to ensure the normal operation of the motor.

[0057] It is worth mentioning that the rotor body 121 in this embodiment can refer to the rotor body structure in the prior art. For example, it includes a plurality of iron cores 1211 sleeved on the rotating shaft 11, an iron core pad 1212 for pressing the plurality of iron cores 1211, and a wire coil 1213 for fastening the iron core pad 1212 and the iron cores 1211.

[0058] In addition, in this embodiment, as a preferred implementation form, referring to Figure 2 As shown in [reference], a crankshaft 111 is sleeved on one end of the rotating shaft 11 close to the boss 41, and a balance weight 1111 and a first bearing 1112 are sequentially sleeved on the crankshaft 111 from top to bottom. The balance weight 1111 is used to eliminate the dynamic unbalance state of the motor.

[0059] The advantage of such a setting is that by setting the crankshaft 111, the stability and efficiency of the motor operation can be improved, and by sleeving the balance weight 1111 on the crankshaft 111, it is beneficial to eliminate the dynamic unbalance state of the motor, thereby facilitating the extension of the service life of the motor.

[0060] As Figure 5 As shown in [reference], as a preferred implementation form, in this embodiment, the stator 13 includes a plurality of magnets 131 arranged at circumferential intervals along the rotor body 121, and a fixing clip 132 is provided between two adjacent magnets 131. The fixing clip 132 is used to fix the corresponding magnet 131.

[0061] It can be understood that the stator 13 is composed of the magnet 131 and the fixing clip 132, with a simple structure. And under the magnetic tendency of the magnet 131, the stable rotation of the rotor body 121 can be realized. At the same time, under the action of the fixing clip 132, the stability of the magnet 131 can be improved.

[0062] Moreover, the stator 13 and the inner wall of the housing 2 can be connected by an adhesive method. Of course, in addition to the adhesive method, other common connection methods can also be used.

[0063] Meanwhile, it is still worth noting that the magnet 131 in this embodiment can adopt magnet products well-known to those skilled in the art, such as permanent magnets, etc. And the number of the magnets 131 can preferably be set to two. Of course, the specific number of the magnets 131 can also be designed and adjusted according to actual needs. For example, it can be set to three or four, as long as the stable rotation of the rotor body 121 can be realized.

[0064] Moreover, considering the convenient installation between the boss 41 and the housing 2, in this embodiment, as Figure 2 and Figure 10As shown in the figure, the boss 41 includes a connecting portion 411 that is in interference fit with the housing 2, a large-diameter groove 412 provided on the connecting portion 411 and extending along the height direction of the housing 2, and a small-diameter groove 413 provided at the bottom of the large-diameter groove 412 and extending along the height direction of the housing 2. The small-diameter groove 413 is used to fix the first bearing 1112.

[0065] With this setting, the connecting portion 411 is in interference fit with the housing 2, which can achieve the convenient installation between the boss 41 and the housing 2. The structure is simple and easy to design and implement. At the same time, through the setting of the small-diameter groove 413, the first bearing 1112 can be fixed to prevent the first bearing 1112 from detaching.

[0066] In the specific structure, as Figure 2 shown in the figure, the diameter dimension of the connecting portion 411 is larger than the diameter dimension of the large-diameter groove 412, the diameter dimension of the housing 2 is larger than the diameter dimension of the connecting portion 411, and a protrusion is provided at one end of the housing 2 where it is connected to the connecting portion 411. After the connecting portion 411 extends into the housing 2 and abuts against the protrusion, due to the restoring force of the material of the housing 2, the housing 2 will generate a tightening force on the connecting portion 411, thereby connecting the housing 2 and the connecting portion 411 together.

[0067] At the same time, in this embodiment, as a preferred implementation form, continue to refer to Figure 2 and Figure 10 shown in the figure, a plurality of second heat dissipation holes 4121 are provided at the bottom of the large-diameter groove 412, and the balance member 1111 rotates around the crankshaft 111 in the large-diameter groove 412 and can block part of the second heat dissipation holes 4121. Here, the balance member 1111 is rotatably arranged in the large-diameter groove 412, which can block part of the second heat dissipation holes 4121, thereby facilitating the enhancement of the flow rate of the working gas.

[0068] During specific implementation, the crankshaft 111 receives external drive and rotates. At this time, due to the limitation of its structure, a certain unbalanced force will be generated, which will cause the motor to vibrate during operation. At this time, the crankshaft 111 will drive the balance member 1111 to rotate to overcome the unbalanced force.

[0069] Moreover, as Figure 6 shown in the figure, the balance member 1111 is fan-shaped. By rotating it, part of the second heat dissipation holes 4121 are blocked. As a result, part of the working gas outflow will be blocked, leading to the accumulation of the working gas, thereby increasing the gas pressure and causing it to flow out from the unblocked second heat dissipation holes 4121. At this time, the flow rate of the working gas will increase after accumulation, which is convenient for removing the dust falling into the second heat dissipation holes 4121.

[0070] In addition, in this embodiment, as a preferred implementation form, as Figure 9 and Figure 10As shown in the figure, a first central hole 311 that is adapted to be inserted through the rotating shaft 11 is provided at the central position of the mounting bracket 31. At the same time, a second central hole 4131 that is adapted to be inserted through the crankshaft 111 is provided at the central position of the small-diameter groove 413. Here, through the settings of the first central hole 311 and the second central hole 4131, it is beneficial for the rotating shaft 11 and the crankshaft 111 to be inserted through.

[0071] In this embodiment, as a preferred implementation form, as Figure 8 As shown in the figure, a seal 322 is provided between the dust cover 331 and the heat dissipation groove 32. The seal 322 is used to prevent the working gas from leaking. With this setting, it is convenient to form a seal for the heat dissipation groove 32 and avoid the working gas from flowing out from the connection between the dust cover 331 and the heat dissipation groove 32.

[0072] In addition, in this embodiment, as a preferred implementation form, as Figure 2 and Figure 4 As shown in the figure, a second bearing 3121 is sleeved on one end of the rotating shaft 11 away from the crankshaft 111, and a bearing cavity 312 is provided at the bottom of the mounting bracket 31. The second bearing 3121 is press-fitted into the bearing cavity 312. Here, by providing the bearing cavity 312, the second bearing 3121 and the bearing cavity 312 are fixed by interference fit, which can effectively prevent the second bearing 3121 from coming off.

[0073] It should be noted that for the relevant structural parts not mentioned in the motor heat dissipation structure of this embodiment, reference can be made to the various structures of the motor in the prior art, such as the wire insertion end 313 inserted on the mounting bracket 31, and the carbon brush holder assembly 314 screwed to the bottom of the mounting bracket 31.

[0074] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A motor heat dissipation structure, characterized in that: It includes a motor main body (1), a housing (2) sleeved on the motor main body (1), and a first heat dissipation part (3) and a second heat dissipation part (4) respectively arranged at both ends of the housing (2); The first heat dissipation part (3) includes a mounting frame (31) arranged at one end of the housing (2), and a heat dissipation groove (32) arranged on the mounting frame (31). A plurality of first heat dissipation holes (321) are arranged along the circumferential direction of the heat dissipation groove (32), and an air inlet assembly (33) is buckled on the heat dissipation groove (32); The second heat dissipation part (4) includes a boss (41) arranged at the other end of the housing (2), and a plurality of second heat dissipation holes (4121) arranged along the circumferential direction of the boss (41); The working gas can flow through each of the first heat dissipation holes (321) through the air inlet assembly (33), exchange heat with the motor main body (1), and then flow out through each of the second heat dissipation holes (4121).

2. The motor heat dissipation structure according to claim 1, characterized in that: The air inlet assembly (33) includes a dust-proof cover (331) arranged in the heat dissipation groove (32), and an air inlet nozzle (332) extending outward along the end of the dust-proof cover (331). The dust-proof cover (331) is used to cover each of the first heat dissipation holes (321).

3. The motor heat dissipation structure according to claim 1, characterized in that: The motor main body (1) includes a rotating shaft (11), a rotor (12) sleeved on the rotating shaft (11), and a stator (13) arranged on the inner wall of the housing (2). The stator (13) is used to drive the rotor (12) to rotate; The rotor (12) includes a rotor main body (121). A gas flow channel (14) is formed between the rotor main body (121) and the stator (13), and the gas flow channel (14) extends along the axial direction of the housing (2).

4. The motor heat dissipation structure according to claim 3, characterized in that: A crankshaft (111) is sleeved on one end of the rotating shaft (11) close to the boss (41), and a balance weight (1111) and a first bearing (1112) are sequentially sleeved on the crankshaft (111) from top to bottom. The balance weight (1111) is used to eliminate the dynamic unbalance state of the motor.

5. The motor heat dissipation structure according to claim 3, characterized in that: The stator (13) includes a plurality of magnets (131) arranged at circumferential intervals along the rotor main body (121), and a fixing clip (132) is arranged between two adjacent magnets (131). The fixing clip (132) is used to fix the corresponding magnet (131).

6. The motor heat dissipation structure according to claim 4, characterized in that: The boss (41) includes a connecting portion (411) that is in interference fit with the housing (2), a large-diameter groove (412) provided on the connecting portion (411) and extending along the height direction of the housing (2), and a small-diameter groove (413) provided at the bottom of the large-diameter groove (412) and extending along the height direction of the housing (2), and the small-diameter groove (413) is used to fix the first bearing (1112).

7. The motor heat dissipation structure according to claim 6, wherein: A plurality of the second heat dissipation holes (4121) are provided at the bottom of the large-diameter groove (412), and when the balance member (1111) rotates around the crankshaft (111) in the large-diameter groove (412), it can block part of the second heat dissipation holes (4121).

8. The motor heat dissipation structure according to claim 6, wherein: A first central hole (311) that is in fit and inserted with the rotating shaft (11) is provided at the central position of the mounting bracket (31); and / or, A second central hole (4131) that is in fit and inserted with the crankshaft (111) is provided at the central position of the small-diameter groove (413).

9. The motor heat dissipation structure according to claim 2, wherein: A seal (322) is provided between the dust cover (331) and the heat dissipation groove (32), and the seal (322) is used to prevent the working gas from leaking out.

10. The motor heat dissipation structure according to claim 4, wherein: A second bearing (3121) is sleeved on one end of the rotating shaft (11) away from the crankshaft (111), and a bearing cavity (312) is provided at the bottom of the mounting bracket (31), and the second bearing (3121) is in interference connection in the bearing cavity (312).

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