A terminal box support structure for an electric machine

Abstract

The application relates to the field of motor terminal box installation, in particular to a terminal box supporting structure of a motor, which comprises a motor shell, a supporting plate, a mounting frame and a supporting rod, the outer wall of the motor shell is provided with a mounting port, the supporting plate is fixedly connected to the inner wall of the mounting port, a wire passing port is arranged between the supporting plate and the inner wall of the mounting port, the mounting frame is fixedly connected to the outer wall of the motor shell, the mounting frame is arranged at the outer periphery of the mounting port, one end of the supporting rod is fixedly connected to the inner wall of the mounting port, the supporting rod is fixedly connected to the supporting plate, and the supporting rod divides the wire passing port into two wire passing ports. The supporting plate is fixed in the inner wall of the mounting port of the motor shell and forms a firm internal framework with the supporting rod, so that the load of the mounting frame and the cable is transferred from the originally weak motor shell wall to the rigid frame, and the reliability of connection, the anti-vibration capability and the structural stability of the whole motor assembly are remarkably improved.

Description

Technical Field

[0001] This application relates to the field of motor junction box installation, and more particularly to a motor junction box support structure. Background Technology

[0002] As a core power device that converts electrical energy into mechanical energy, the structural integrity and operational reliability of the electric motor are of paramount importance. Among the components of the motor, the junction box plays a crucial role, providing a cavity for connecting and protecting the internal power lines with the external power source.

[0003] The installation of junction boxes generally adopts a design scheme that directly attaches to the motor housing. That is, a wire pass-through port is opened in the motor housing wall for the wire harness to pass through, and a mounting hole is opened to fix the junction box. The mounting hole is located on the outer periphery of the wire pass-through port. The entire weight of the junction box, its internal components, cables, and external loads are borne solely by the motor housing wall.

[0004] However, the casing wall has insufficient support strength and rigidity, and is prone to deformation under long-term vibration or heavy load, affecting the reliability of the connection. Utility Model Content

[0005] In order to improve the connection strength between the junction box and the motor housing, this application provides a junction box support structure for a motor.

[0006] The junction box support structure for a motor provided in this application adopts the following technical solution: A junction box support structure for an electric motor includes a motor housing, a support plate, a mounting frame, and a support rod. The outer wall of the motor housing has a mounting opening. The support plate is fixedly connected to the inner wall of the mounting opening. A wire passage is provided between the support plate and the inner wall of the mounting opening. The mounting frame is fixedly connected to the outer wall of the motor housing and is located on the outer periphery of the mounting opening. One end of the support rod is fixedly connected to the inner wall of the mounting opening and is fixedly connected to the support plate. The support rod divides the wire passage into two wire insertion ports.

[0007] By adopting the above technical solution, the support plate is fixed to the inner wall of the mounting port of the motor housing, and together with the support rod, they form a solid internal frame. This transfers the load of the mounting frame and its cable from the originally weak housing wall to this rigid frame. While reinforcing the overall structure, the support rod also scientifically divides the cable passage into two cable entry points, effectively dispersing the concentrated stress and torque generated when the cable is introduced, preventing it from acting directly on the connection point between the mounting frame and the housing. This significantly improves the reliability of the connection, the vibration resistance, and the structural stability of the entire motor assembly.

[0008] Preferably, the reinforcing rib is fixedly connected to the outer wall of the motor housing, and one end of the reinforcing rib is fixedly connected to the outer wall of the mounting frame.

[0009] By adopting the above technical solution, the reinforcing rib can effectively transfer and distribute the load borne by the mounting frame, especially the unavoidable lateral torque, to a larger area of ​​the motor housing wall. This significantly enhances the local rigidity and deformation resistance of the area around the mounting opening, completely solving the problem that the connection between the mounting frame and the housing in traditional structures is prone to tearing or loosening due to stress concentration. Ultimately, this achieves the ultimate reliability and durability of the junction box support structure under long-term harsh working conditions.

[0010] Preferably, it also includes a heat dissipation strip, which is fixedly connected to the outer wall of the motor housing, and one end of the heat dissipation strip is fixedly connected to the outer wall of the mounting frame.

[0011] By adopting the above technical solution, the heat dissipation strip further consolidates the overall rigidity and can continuously conduct the heat generated by the electrical components inside the junction box to the huge natural heat sink of the motor housing through the mounting frame and heat dissipation strip. This fundamentally solves the problem of insufficient local support strength and vibration resistance of the housing wall, while significantly reducing the operating temperature inside the junction box and simultaneously improving the mechanical reliability, electrical safety and service life of the motor connection.

[0012] Preferably, there are multiple heat dissipation strips, which are spaced apart along the circumference of the motor housing.

[0013] By adopting the above technical solution, the external reinforcing ribs parallel to the length of the motor housing and the multiple heat dissipation strips spaced apart along the circumference of the motor housing together form a composite reinforcing frame, which evenly distributes the complex load on the mounting frame to a larger area of ​​the motor housing wall, thereby greatly improving local rigidity and vibration resistance.

[0014] Preferably, it also includes a cover, which is detachably connected to the side of the mounting frame away from the motor housing.

[0015] By adopting the above technical solution, the detachable cover ensures the system's sealing and protection performance while greatly facilitating the installation, inspection, and maintenance of components inside the junction box.

[0016] Preferably, it also includes screws. The mounting frame has a fixing groove on the side away from the motor housing. There are multiple fixing grooves, which are arranged along the edge of the mounting frame. The cover has a fixing opening, which is also provided in multiple ways. The fixing openings correspond one-to-one with the fixing grooves. The screw passes through the fixing opening and is threaded to the groove wall of the fixing groove.

[0017] By adopting the above technical solution, and through the cooperation of multiple screws evenly distributed along the edge of the mounting frame and the fixing groove, a reliable and uniform clamping force is achieved between the cover and the mounting frame. This not only ensures the convenience of cover disassembly and maintenance, but more importantly, it ensures the sealing protection level of the junction box joint surface under all working conditions, effectively preventing moisture and dust intrusion. Thus, the reliability, safety and service life of the motor product are comprehensively improved in four dimensions: mechanical strength, heat dissipation efficiency, ease of use and environmental adaptability.

[0018] Preferably, it also includes a positioning post, and the end of the support rod away from the motor housing is provided with a positioning groove. The positioning post is fixedly connected to one side of the cover, and the positioning groove is used for the positioning post to extend into.

[0019] By adopting the above technical solution, the positioning pin extends into the positioning groove, which improves the connection strength between the cover and the support rod, and also improves the connection strength between the junction box and the motor housing.

[0020] Preferably, there are multiple positioning slots, which are spaced apart along the length of the support rod, and multiple positioning posts, which are arranged in a one-to-one correspondence with the positioning slots.

[0021] By adopting the above technical solution, multiple positioning grooves and positioning posts work together to ensure that the fixing opening of the cover is aligned with the fixing groove, which facilitates the installation of the cover.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The support plate is fixed to the inner wall of the mounting opening of the motor housing, forming a robust internal frame with the support rod. This transfers the load of the mounting frame and its cables from the originally weak housing wall to this rigid frame. While reinforcing the overall structure, the support rod also scientifically divides the cable entry point into two channels, effectively dispersing the concentrated stress and torque generated during cable introduction and preventing them from directly acting on the connection point between the mounting frame and the housing. This significantly improves the reliability of the connection, vibration resistance, and the structural stability of the entire motor assembly. ... 2. The heat dissipation strip further strengthens the overall rigidity and can continuously conduct the heat generated by the electrical components inside the junction box to the huge natural heat sink of the motor housing through the mounting frame and heat dissipation strip. This fundamentally solves the problem of insufficient local support strength and vibration resistance of the housing wall, while significantly reducing the operating temperature inside the junction box and simultaneously improving the mechanical reliability, electrical safety and service life of the motor connection. 3. The positioning pin extends into the positioning groove, which improves the connection strength between the cover and the support rod, and also improves the connection strength between the junction box and the motor housing. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the overall structure of a junction box support structure for an electric motor.

[0024] Figure 2 It is a schematic diagram of the overall structure of the motor housing, support plate, mounting frame, support rod, reinforcing ribs and heat dissipation strips.

[0025] Figure 3 This is a schematic diagram of the overall structure of the cover and the positioning post.

[0026] Explanation of reference numerals in the attached drawings: 1. Motor housing; 11. Mounting port; 2. Support plate; 21. Wire passage port; 211. Wire threading port; 3. Mounting frame; 31. Fixing groove; 4. Support rod; 41. Positioning groove; 5. Reinforcing rib; 6. Heat dissipation strip; 7. Cover; 71. Fixing port; 8. Screw; 9. Positioning post. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0028] This application discloses a junction box support structure for a motor. (Refer to...) Figure 1 and Figure 2 A junction box support structure for an electric motor includes a motor housing 1, a support plate 2, a mounting frame 3, a support rod 4, a reinforcing rib 5, a heat dissipation strip 6, a cover 7, and screws 8.

[0029] Reference Figure 2 The outer wall of the motor housing 1 is provided with a mounting opening 11. The support plate 2 is fixedly connected to the inner wall of the mounting opening 11. A wire passage 21 is provided between the support plate 2 and the inner wall of the mounting opening 11. The mounting frame 3 is fixedly connected to the outer wall of the motor housing 1 and is located on the outer periphery of the mounting opening 11. One end of the support rod 4 is fixedly connected to the inner wall of the mounting opening 11. The support rod 4 is fixedly connected to the side of the support plate 2 facing the mounting frame 3. The length direction of the support rod 4 is parallel to the length direction of the motor housing 1. The support rod 4 divides the wire passage 21 into two equal wire passages 211.

[0030] A reinforcing rib 5 is located on the side of the support plate 2 away from the cable outlet 21. The reinforcing rib 5 is fixedly connected to the outer wall of the motor housing 1. The length direction of the reinforcing rib 5 is collinear with the length direction of the support rod 4. One end of the reinforcing rib 5 is fixedly connected to the outer wall of the mounting frame 3. A heat dissipation strip 6 is fixedly connected to the outer wall of the motor housing 1. One end of the heat dissipation strip 6 is fixedly connected to the outer wall of the mounting frame 3. Multiple heat dissipation strips 6 are provided, and multiple heat dissipation strips 6 are respectively located on both sides of the reinforcing rib 5. The multiple heat dissipation strips 6 are evenly spaced along the circumference of the motor housing 1.

[0031] Reference Figure 1 and Figure 2The cover 7 is detachably connected to the side of the mounting frame 3 away from the motor housing 1. The side of the mounting frame 3 away from the motor housing 1 is provided with a fixing groove 31. There are four fixing grooves 31. The four fixing grooves 31 are set along the edge of the mounting frame 3. The four fixing grooves 31 are respectively close to the four corners of the mounting frame 3. The cover 7 is provided with a fixing opening 71. There are four fixing openings 71. The fixing openings 71 are set one-to-one with the fixing grooves 31. The screw 8 passes through the fixing opening 71 and is threaded to the groove wall of the fixing groove 31.

[0032] Reference Figure 2 and Figure 3 A junction box support structure for a motor also includes positioning posts 9. A positioning groove 41 is provided at the end of the support rod 4 facing away from the motor housing 1. One end of the positioning post 9 is fixedly connected to one side of the cover 7. The axis of the positioning post 9 is perpendicular to the cover 7. The positioning groove 41 is used for the positioning post 9 to extend into, and the positioning post 9 is slidably connected to the groove wall of the positioning groove 41. Two positioning grooves 41 are provided, spaced apart along the length of the support rod 4. Two positioning posts 9 are provided, and each positioning post 9 corresponds to one positioning groove 41.

[0033] The implementation principle of the junction box support structure of a motor in this application embodiment is as follows: the support plate 2, support rod 4, reinforcing rib 5 and heat dissipation strip 6 all improve the connection strength between the mounting frame 3 and the motor housing 1. After the positioning post 9 is aligned with the positioning groove 41, the positioning post 9 slides into the positioning groove 41. At this time, the fixing port 71 is aligned with the fixing groove 31. The screw 8 is installed to complete the installation of the cover 7.

[0034] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A junction box support structure for an electric motor, characterized in that: The device includes a motor housing (1), a support plate (2), a mounting frame (3), and a support rod (4). The outer wall of the motor housing (1) is provided with a mounting opening (11). The support plate (2) is fixedly connected to the inner wall of the mounting opening (11). A wire passage opening (21) is provided between the support plate (2) and the inner wall of the mounting opening (11). The mounting frame (3) is fixedly connected to the outer wall of the motor housing (1) and is located on the outer periphery of the mounting opening (11). One end of the support rod (4) is fixedly connected to the inner wall of the mounting opening (11). The support rod (4) is fixedly connected to the support plate (2). The support rod (4) divides the wire passage opening (21) into two wire through openings (211).

2. The junction box support structure for a motor according to claim 1, characterized in that: It also includes a reinforcing rib (5), which is fixedly connected to the outer wall of the motor housing (1), and one end of the reinforcing rib (5) is fixedly connected to the outer wall of the mounting frame (3).

3. The junction box support structure for a motor according to claim 1, characterized in that: It also includes a heat sink (6), which is fixedly connected to the outer wall of the motor housing (1), and one end of the heat sink (6) is fixedly connected to the outer wall of the mounting frame (3).

4. The junction box support structure for a motor according to claim 3, characterized in that: The heat dissipation strips (6) are provided in multiples, and the multiple heat dissipation strips (6) are arranged at intervals along the circumference of the motor housing (1).

5. The junction box support structure for a motor according to claim 1, characterized in that: It also includes a cover (7), which is detachably connected to the side of the mounting frame (3) away from the motor housing (1).

6. The junction box support structure for a motor according to claim 5, characterized in that: It also includes screws (8). The mounting frame (3) is provided with a fixing groove (31) on the side away from the motor housing (1). There are multiple fixing grooves (31) and multiple fixing grooves (31) are provided along the edge of the mounting frame (3). The cover (7) is provided with fixing openings (71). There are multiple fixing openings (71) and fixing grooves (31) are provided one to one. The screws (8) pass through the fixing openings (71) and are threaded to the groove wall of the fixing groove (31).

7. The junction box support structure for a motor according to claim 1, characterized in that: It also includes a positioning post (9), and the support rod (4) has a positioning groove (41) at one end away from the motor housing (1). The positioning post (9) is fixedly connected to one side of the cover (7), and the positioning groove (41) is used for the positioning post (9) to extend into.

8. The junction box support structure for a motor according to claim 7, characterized in that: The positioning groove (41) is provided in multiple ways, and the multiple positioning grooves (41) are spaced apart along the length direction of the support rod (4). The positioning column (9) is provided in multiple ways, and the positioning column (9) is provided in a one-to-one correspondence with the positioning groove (41).

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