Motor shell

Abstract

The utility model discloses a motor shell, which solves the problems of high replacement cost and the like caused by integral molding of a motor shell. The fan comprises a main machine shell, a control box and a fan cover which are arranged in a split mode, and the control box is detachably and fixedly connected with the main machine shell and located on the radial outer side of the main machine shell. The interior of the control box is used for installing various connecting wires and circuit boards, and the top of the control box is provided with a control panel. And mutually matched positioning structures are arranged between the control box and the fan cover. Maintenance personnel can conveniently take out the control box and directly maintain or replace internal fault components, meanwhile, only the control box needs to be replaced or transformed, the whole main body shell does not need to be replaced, high shell replacement cost caused by structural change of the control box is avoided, and enterprises can flexibly optimize and upgrade the control box according to actual requirements; in addition, positioning structures matched with each other are arranged between the control box and the fan cover, so that the overall operation stability of the motor is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of motor, especially a motor casing. BACKGROUND

[0002] Traditional motor often integrates motor main body and control part in a relatively closed overall casing. This integrated design can meet basic operation demand in early simple application scene. However, with the development of technology, the disadvantages are increasingly apparent. On the one hand, when the connection line or circuit board inside the motor needs to be repaired or replaced, since it is closed in the narrow overall casing space, the maintenance personnel is extremely inconvenient to operate, needs to spend a lot of time to disassemble many components to reach the fault position, which undoubtedly increases the maintenance cost and downtime, seriously affects the production efficiency.

[0003] On the other hand, due to the popularity of intelligence, the upgrading and optimization of motor focus on the expansion and fine control of control function. This makes the difference between different types of motors mainly reflected in the control box part, and the structure, circuit layout and control module carried are not the same. But due to the reason of traditional integrated design, when the control box structure changes due to upgrading or adaptation to special needs, the enterprise often has to replace the whole main body shell, which will inevitably increase the shell replacement cost.

[0004] In addition, the connection structure of the fan cover and the casing of the previous motor is simple, and only relies on the conventional connection mode. When used for a long time or subjected to a certain external impact, the fan cover is easy to displace, affecting the heat dissipation effect, and further affecting the overall performance and service life of the motor. SUMMARY

[0005] The utility model discloses a motor casing, which solves the problems of inconvenient maintenance and high replacement cost caused by the integrated forming of the motor casing.

[0006] The utility model discloses a technical scheme, which comprises a main body casing, a control box and a fan cover arranged in a split mode. The control box is detachably fixedly connected with the main body casing and located on the radial outer side of the main body casing. The control box is internally provided with various connection lines and circuit boards, and a control panel is arranged on the top of the control box. The control box and the fan cover are provided with a positioning structure matched with each other.

[0007] According to the technical scheme, the control box is arranged separately from the main body shell, so that maintenance personnel can conveniently take out the control box to directly maintain or replace internal faulty components, and only the control box needs to be replaced or modified, without the need to replace the entire main body shell, thereby avoiding high shell replacement costs caused by changes in the structure of the control box, and enterprises can flexibly optimize and upgrade the control box according to actual needs to adapt to diversified intelligent market application scenarios. In addition, the positioning structure arranged between the control box and the fan cover effectively prevents displacement of the fan cover during long-term use or under external force impact, thereby improving the stability of overall operation of the motor.

[0008] In a possible design, the positioning structure includes a recess and a protrusion that cooperate with each other, the recess is arranged on one of the control box or the fan cover, and the protrusion is arranged on the other one of the fan cover or the control box.

[0009] According to the above design, the control box and the fan cover are quickly positioned, the operator can quickly find the connection position during assembly, the assembly efficiency is improved, and displacement caused by vibration of the fan cover during operation of the motor is effectively prevented.

[0010] In a possible design, the protrusion is arranged on the outer surface of the control box, an installation groove is formed in the control box at the position of the protrusion, and a power capacitor is installed in the installation groove.

[0011] According to the above design, the space structure of the protrusion on the outer surface of the control box is fully utilized to form an installation groove in the control box to install a power capacitor, so that the internal space layout of the control box is reasonably optimized, the electronic components are more compact and orderly distributed, and problems such as line entanglement and poor heat dissipation caused by space congestion are avoided.

[0012] In a possible design, the bottom of the control box is arranged in a spaced-apart manner from the main body shell, and a plurality of regularly arranged heat dissipation fins are integrally formed at the bottom of the control box.

[0013] According to the above design, the spaced-apart arrangement is beneficial to air circulation, prevents the control box from accumulating heat and being unable to dissipate due to long-term close contact with the main body shell, the heat dissipation fins greatly increase the contact area of the control box and air, and the heat dissipation effect is strengthened, so that the electronic components in the control box can work in a suitable temperature environment, and the probability of damage of the components due to overheating is reduced.

[0014] In a possible design, the control box includes a box seat and a top cover, the top cover is installed on the box seat, a control panel is installed on the top cover, at least two layers of circuit boards are installed in the box seat, the circuit boards at least include a control circuit board on an upper layer and a driving circuit board on a lower layer, and a power capacitor is installed on the bottom surface of the driving circuit board.

[0015] The above design facilitates the classification, layout, and management of circuits, allowing circuits with different functions to be connected in an orderly manner between the two circuit boards, reducing the difficulty of troubleshooting circuit faults. On the other hand, when a circuit board on a certain layer fails, the corresponding part can be opened for repair without having to completely disassemble the entire control box.

[0016] In one possible design, the main housing and the control box are fixedly connected by bolts, and the fan cover is fixedly connected to both the main housing and the control box by bolts.

[0017] The bolted connection method, as described above, has the advantages of being stable and reliable, and can withstand the vibration generated during motor operation, ensuring that the components will not loosen or detach due to vibration. Attached Figure Description

[0018] Fig. 1 This is a schematic diagram of the external structure of a specific embodiment of the present utility model;

[0019] Fig. 2 This is a perspective sectional view of a specific embodiment of the present utility model;

[0020] Fig. 3 This is a cross-sectional view of the control box of this utility model;

[0021] The components include: 1. Main casing; 2. Control box; 21. Control panel; 22. Heat sink; 23. Box base; 24. Top cover; 25. Control circuit board; 26. Drive circuit board; 27. Power capacitor; 3. Fan cover; 4. Positioning structure; 41. Groove; 42. Protrusion; 43. Mounting slot. Detailed Implementation

[0022] like Figs. 1-3 The electric motor housing shown includes a separate main housing 1, a control box 2, and a fan shroud 3. The main housing 1, as the core supporting component of the electric motor, is cast from a high-strength metal material with good heat dissipation properties, such as aluminum alloy, to ensure it can withstand the mechanical stress of the electric motor during operation and effectively dissipate internal heat. The control box 2 is located radially outward of the main housing 1 and is detachably fixed to the main housing 1 by bolts. Threaded holes are pre-machined at the corresponding connection points between the main housing 1 and the control box 2. Bolts are passed through the bottom surface of the control box 2 and screwed into the threaded holes of the main housing 1, tightened, and the connection is secure. The control box 2 has pre-designed slots and mounting brackets for installing various connecting wires and circuit boards. The connecting wires are routed in an orderly manner according to the electrical schematic, connecting the windings, sensors, and other components inside the electric motor to the circuit boards inside the control box 2. The circuit boards are fixed in the slots with screws to prevent them from shaking during operation. A control panel 21 is mounted on the top of the control box 2 by embedded installation or screw fastening.

[0023] The control box 2 and the fan cover 3 are provided with a positioning structure 4 matched with each other, and the positioning structure 4 is matched with a groove 41 and a protrusion 42. Taking the protrusion 42 located at the control box 2 as an example, a protrusion 42 with a cross-section shape of an inverted trapezoid or a rectangle is integrally formed on the bottom surface of the control box 2 during the injection molding process, and the height of the protrusion 42 is designed according to the thickness of the fan cover 3 and the connection strength requirement, and is generally between 5-10 mm. The groove 41 is inwardly punched at the corresponding position during the stamping forming of the fan cover 3, and a groove 41 structure matched with the protrusion 42 is formed, and the depth of the groove 41 is slightly greater than the height of the protrusion 42, so that the protrusion 42 can be smoothly embedded in the groove 41 and will not easily fall off. During assembly, the operator aligns the protrusion 42 of the control box 2 with the groove 41 of the fan cover 3, and gently pushes it in, so that quick and accurate positioning can be realized, and then bolt connection and fixation are performed, so that displacement of the fan cover 3 under the vibration of the motor operation or external force impact is effectively prevented.

[0024] When the protrusion 42 is located on the outer surface of the control box 2, an installation groove 43 structure is constructed in the internal space of the protrusion 42 on the bottom surface of the control box 2. The installation groove 43 is used to install the power capacitor 27 which occupies a large internal space, and the shape of the installation groove 43 is designed according to the contour of the power capacitor 27, and is generally a cuboid groove 41 with a depth capable of accommodating the power capacitor 27, and a rubber buffer pad is arranged in the groove to prevent the power capacitor 27 from being damaged due to vibration and collision with the groove wall during operation.

[0025] The bottom of the control box 2 is arranged at a distance from the main body shell 1, and the distance is kept between 10-20 mm. During the forming process, a plurality of regularly arranged heat dissipation fins 22 are integrally formed on the bottom of the control box 2, and the thickness of the heat dissipation fins 22 is generally between 2-5 mm, the height is between 10-30 mm, and the distance between adjacent fins is between 5-10 mm, so that the air can flow smoothly. Similarly, the heat dissipation fins 22 are also arranged on the main body shell 1. During the operation of the motor, hot air will flow into the gap between the bottom of the control box 2 and the main body shell 1, and when passing through the heat dissipation fins 22, the heat is quickly transferred to the heat dissipation fins 22, and then taken away by the flowing air, so that the heat dissipation effect is strengthened, the working temperature of the electronic components in the control box 2 is stably kept within the appropriate range, and the influence of the heating of the main body shell 1 on the electronic components in the control box 2 is reduced.

[0026] The control box 2 comprises a box seat 23 and a top cover 24, which are tightly covered by buckles or screws. In the box seat 23, the lower driving circuit board 26 is first installed, which is fixed on the upper surface of the box seat 23 by screws to ensure its horizontal stability. The power capacitor 27 is installed in the bottom mounting groove 43 of the driving circuit board 26 and fixed in the above manner. Then, the control circuit board 25 is installed on the upper layer of the driving circuit board 26, which is connected with the driving circuit board 26 by a wire or a connector to realize the electrical signal transmission.

Claims

1. An electric motor housing characterized by: Including split main body shell (1), control box (2) and fan cover (3), control box (2) and main body shell (1) are detachably fixedly connected, and are located on the radial outside of main body shell (1);The inside of control box (2) is installed with various connecting wires and circuit boards, and the top of control box (2) is provided with control panel (21);The control box (2) and fan cover (3) are provided with mutually matched positioning structure (4).

2. The electric motor housing of claim 1, wherein: The positioning structure (4) includes recess (41) and protruding block (42) matched with each other, recess (41) is located in one of control box (2) or fan cover (3), and protruding block (42) is located in the other of fan cover (3) or control box (2).

3. The electric motor housing of claim 2, wherein: The protruding block (42) is located on the outer surface of control box (2), and the mounting groove (43) is formed in control box (2) at the position of protruding block (42), and the power capacitor (27) is installed in mounting groove (43).

4. The electric motor housing of claim 1 or 2, wherein: The bottom of control box (2) is spaced apart from main body shell (1), and the bottom of control box (2) is integrally formed with a plurality of regularly arranged heat dissipation fins (22).

5. The electric motor housing of claim 3, wherein: The control box (2) includes box seat (23) and top cover (24), the top cover (24) is installed on the box seat (23), the control panel (21) is located at the top cover (24), and the box seat (23) is installed with at least two layers of circuit boards, the circuit boards at least include control circuit board (25) located in the upper layer and driving circuit board (26) located in the lower layer, and the power capacitor (27) is installed on the bottom surface of driving circuit board (26).

6. The electric motor housing of claim 1 or 2, wherein: The main body shell (1) and control box (2) are fixedly connected by bolts, and the fan cover (3) is fixedly connected with main body shell (1) and control box (2) by bolts respectively.

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