An electric machine

Abstract

The utility model discloses a motor belongs to motor cooling technical field, including the casing, be provided with stator subassembly and rotor subassembly in the casing, be provided with the terminal box on the casing, the cavity of casing with terminal box is provided with the heat pipe, the first end of heat pipe is located the inner chamber of casing, the tail end stretches into the inner chamber of terminal box, the outer wall of terminal box is provided with the radiator, and the heat in the motor of this design is conducted to the terminal box through the heat pipe, and finally is radiated through the radiator of terminal box outer wall, thereby reducing the temperature in the motor inner chamber and the terminal box, and the heat pipe cooling is as the supplementary cooling, and effectively fills up the place of water cooling structure deficiency, improves the whole machine cooling efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of motor cooling technology, and specifically relates to a motor. Background Technology

[0002] Traditional water-cooled motors are cooled by a housing assembly with a water jacket and a stator assembly. The heat generated by the windings during motor operation is transferred to the stator core and then to the inner wall of the housing through the interference fit between the stator assembly and the inner wall of the housing. The heat is then carried away by the water flowing through the water jacket. The entire machine only dissipates heat from the stator assembly and cannot dissipate heat from the junction box and the motor cavity. The overall cooling efficiency is limited, and the components inside the junction box are prone to failure due to overheating. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a motor that can efficiently conduct heat from the motor and junction box to the heat dissipation device, thereby improving the overall cooling efficiency, in order to address the shortcomings of the existing technology.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] An electric motor includes a housing, a stator assembly and a rotor assembly disposed within the housing, a junction box disposed on the housing, a heat pipe disposed within the cavity of the housing and the junction box, the first end of the heat pipe being located in the inner cavity of the housing and the tail end extending into the inner cavity of the junction box, and a heat dissipation device disposed on the outer wall of the junction box.

[0006] Furthermore, the first end of the heat pipe is located on the front side of the stator assembly or the rotor assembly.

[0007] Furthermore, the tail end of the heat pipe extends from below the front end of the junction box to the inner edge of the rear end of the junction box.

[0008] Furthermore, a terminal block is provided inside the junction box, and the heat pipe is connected and fixed to the terminal block.

[0009] Furthermore, the terminal block has a mounting hole, the extension direction of which is consistent with the axial direction of the motor, and the heat pipe passes through the mounting hole.

[0010] Furthermore, the terminal block is provided with a plurality of threaded holes for installing terminal bolts, and each threaded hole has mounting holes on both sides, and the heat pipe is provided in a plurality of such holes and passes through the mounting holes respectively.

[0011] Furthermore, the mounting hole is located near the upper surface of the terminal block.

[0012] Furthermore, the heat dissipation device is a heat sink, which is detachably mounted to the outer wall of the junction box by fasteners.

[0013] Furthermore, the heat sink has multiple heat dissipation fins spaced apart on the side away from the junction box.

[0014] Furthermore, the heat dissipation fins are parallel to the direction of travel of the vehicle in which the motor is mounted.

[0015] After adopting the above technical solution, the beneficial effects of this utility model are:

[0016] In the motor disclosed in this utility model, the heat inside the motor is conducted to the junction box through heat pipes, and finally dissipated through the heat dissipation device on the outer wall of the junction box, thereby reducing the temperature inside the motor cavity and the junction box. Heat pipe cooling serves as supplementary cooling, effectively filling the gaps in the water cooling structure, improving the overall cooling efficiency, with a simple structure, reliable operation, no moving parts, and low cost.

[0017] In this invention, heat pipes pass through both sides of the threaded hole on the terminal block and are located near the upper end face of the terminal block. This can effectively reduce the temperature rise caused by the heat generated by the contact resistance between the stator harness terminals and the external harness terminals in the terminal block, resulting in good heat dissipation for the terminal block.

[0018] In this invention, the heat dissipation fins are parallel to the direction of travel of the vehicle on which the motor is mounted. When the vehicle moves forward, the airflow carries away heat through the gaps between the heat dissipation fins, which is conducive to heat dissipation without the need for additional forced airflow. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the internal structure of the motor of this utility model (along the direction of the heat pipe extension);

[0020] Figure 2 It is a cross-sectional view along the extension direction of the stator wire harness;

[0021] Figure 3 This is a schematic diagram of the terminal block structure;

[0022] Figure 4 This is a sectional view of the terminal block section;

[0023] Figure 5 This is a schematic diagram of the external structure of the motor of this utility model;

[0024] Figure 6 This is an assembly diagram of the heat sink;

[0025] In the diagram, 1-motor, 11-housing, 12-stator assembly, 121-stator wiring harness, 13-rotor assembly, 2-junction box, 21-terminal base, 211-threaded hole, 212-mounting hole, 213-connection bolt, 22-heat pipe, 221-start end, 222-end end, 23-heat sink, 231-heat sink fins, 24-mounting bolt. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the textual part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0027] It should be noted that in this application, "front" refers to the output side of motor 1, i.e. Figure 1 On the right side of the middle section, "rear" refers to the non-output side of motor 1, i.e. Figure 1 On the left side.

[0028] like Figure 1 and Figure 5 As shown, an electric motor includes a housing 11, within which a stator assembly 12 and a rotor assembly 13 are disposed. A junction box 2 is mounted on the housing 11. A heat pipe 22 is disposed within the cavities of the housing 11 and the junction box 2. The first end 221 of the heat pipe 22 is located within the inner cavity of the housing 11, and the second end 222 extends into the inner cavity of the junction box 2. A heat dissipation device is disposed on the outer wall of the junction box 2. Heat from inside the motor 1 is conducted to the junction box 2 through the heat pipe 22 and finally dissipated through the heat dissipation device on the outer wall of the junction box 2, thereby reducing the temperature inside the motor 1 and the junction box 2.

[0029] like Figure 1 As shown, the first end 221 of the heat pipe 22 is located on the front side of the stator assembly 12 or the rotor assembly 13, and the specific installation position can be set as needed. The last end 222 of the heat pipe 22 extends from the lower front end of the junction box 2 to the inner edge of the rear end of the junction box 2, covering the inner cavity of the junction box 2. At this time, the heat pipe 22 forms a U-shaped structure with one side longer than the other. The specific length and shape of the heat pipe 22 can also be set according to requirements; this application only shows one example.

[0030] A junction box 2 contains a terminal block 21. Preferably, in this application, the heat pipe 22 is connected and fixed to the terminal block 21. Figure 2It is known that existing terminal blocks 21 generally have several threaded holes 211 for installing terminal bolts 213 (achieved by injection molding nuts into the terminal block 21). The terminals of the stator harness 121 connected to the stator assembly 12 and the external harness terminals are fixed in the threaded holes 211 by the terminal bolts 213. The contact resistance formed between the terminals of the stator harness 121 and the external harness terminals will generate heat, causing the terminal block 21 to experience a temperature rise.

[0031] Therefore, in this application, the terminal block 21 is provided with a mounting hole 212. The extension direction of the mounting hole 212 is consistent with the axial direction of the motor 1. The opening direction of the mounting hole 212 is specifically consistent with the axial direction of the motor 1. The heat pipe 22 passes through the mounting hole 212 and is fixed in the mounting hole 212, which can absorb the heat in the terminal block 21.

[0032] To ensure heat absorption in the terminal block 21 and reduce costs, the number of heat pipes 22 installed can be set as needed.

[0033] In this application, such as Figure 3 and Figure 4 As shown, each threaded hole 211 has mounting holes 212 on both sides. Multiple heat pipes 22 are provided and pass through the mounting holes 212 one by one, which can improve the heat absorption effect in the terminal block 21. Furthermore, the mounting holes 212 are located near the upper end face of the terminal block 21, and the heat pipes 22 pass near the bottom of the wiring bolts 213, which can better absorb the heat generated by the contact resistance between the terminals of the stator harness 121 and the external harness terminals.

[0034] like Figure 5 and Figure 6 As shown, the heat dissipation device is a heat sink 23, which is detachably mounted to the outer wall of the junction box 2 by fasteners, such as mounting bolts 24. Multiple heat dissipation fins 231 are spaced apart on the side of the heat sink 23 away from the junction box 2, resulting in a large heat dissipation area and thus good heat dissipation effect.

[0035] When the motor 1 is used in vehicles such as cars and trucks, the heat dissipation fins 231 are parallel to the direction of travel of the vehicle in which the motor 1 is mounted. When the vehicle moves forward, the airflow carries away the heat through the gaps between the heat dissipation fins 231, thereby using the airflow to dissipate heat. There is no need to provide additional forced airflow, so there is no need to add components such as fans, thereby reducing costs.

[0036] In this application, heat sinks 23 are installed only on the left and right sides of junction box 2. To improve the heat dissipation effect, heat sinks 23 can also be installed on the top and front end of junction box 2. Heat can also be dissipated by the airflow when the vehicle moves forward, which is not shown in the figure of this scheme.

[0037] The motor of this invention has a heat pipe installed in the cavity connecting the motor housing and the junction box. The heat inside the motor is conducted to the junction box through the heat pipe and finally dissipated through the heat dissipation device on the outer wall of the junction box, thereby reducing the temperature inside the motor cavity and the junction box. The heat pipe cooling serves as a supplementary cooling method, effectively filling the gaps in the water cooling structure, improving the overall cooling efficiency, and features a simple structure, reliable operation, no moving parts, and low cost.

[0038] In this specification, the terms "several" and similar expressions mean one or more. "More than" means at least two, such as two, three, etc., unless otherwise explicitly specified. Unless otherwise explicitly specified, terms such as "set," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of these terms in this utility model based on the specific content of the technical solution.

[0039] While specific embodiments of this utility model have been described above, those skilled in the art should understand that the described embodiments are merely some, not all, embodiments of this utility model. These are merely illustrative examples, and the scope of protection of this utility model is defined by the claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model and without any inventive effort, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. An electric machine comprising a casing (11) in which a stator assembly (12) and a rotor assembly (13) are arranged, and a terminal box (2) arranged on the casing (11), characterized in that, A heat pipe (22) is installed inside the cavity of the casing (11) and the junction box (2). The first end (221) of the heat pipe (22) is located in the inner cavity of the casing (11), and the last end (222) extends into the inner cavity of the junction box (2). A heat dissipation device is installed on the outer wall of the junction box (2).

2. The electric machine of claim 1, wherein, The first end (221) of the heat pipe (22) is located on the front side of the stator assembly (12) or the rotor assembly (13).

3. The electric machine of claim 2, wherein, The tail end (222) of the heat pipe (22) extends from the bottom of the front end of the junction box (2) to the inner edge of the rear end of the junction box (2).

4. The electric machine of claim 3, wherein, A junction box (2) is provided with a junction box (21), and the heat pipe (22) is connected and fixed to the junction box (21).

5. The electric machine of claim 4, wherein, The terminal block (21) has a mounting hole (212) extending in the same direction as the axial direction of the motor (1), and the heat pipe (22) passes through the mounting hole (212).

6. The electric machine of claim 5, wherein, The terminal block (21) is provided with several threaded holes (211) for installing the terminal bolts (213). Each threaded hole (211) has mounting holes (212) on both sides. The heat pipe (22) is provided with multiple holes and passes through the mounting holes (212) one by one.

7. The electric machine of claim 6, wherein, The mounting hole (212) is located near the upper surface of the terminal block (21).

8. The electric machine of any one of claims 1 to 7, characterized in that The heat dissipation device is a heat sink (23), which is detachably installed on the outer wall of the junction box (2) by fasteners.

9. The electric machine of claim 8, wherein, Multiple heat dissipation fins (231) are arranged at intervals on the side of the heat sink (23) away from the junction box (2).

10. The electric machine of claim 9, wherein, The heat dissipation fins (231) are parallel to the direction of travel of the vehicle on which the motor (1) is mounted.

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