Insulation junction box for traction motor

Abstract

The utility model discloses an insulating junction box for a traction motor, which comprises a junction box main body and a cover body, and the junction box main body is provided with a motor lead hole and a cable hole; the connection box main body and the cover body are both made of insulating materials, the connection box main body is provided with a first embedded body and a second embedded body, the first embedded body is located at the edge of the connection box main body, and the first embedded body is provided with a first inner screw hole used for installing the cover body; the second embedded body is arranged corresponding to the inner cavity of the connecting box main body, and the second embedded body is provided with a second inner screw hole; and the first embedded body, the second embedded body and the connecting box main body are integrally formed. According to the utility model, the junction box is made of an insulating material, thereby avoiding the large size of the junction box caused by the electrical clearance requirement of a metal junction box, and achieving the small size and light weight design; the first embedding body, the second embedding body, the third embedding body and the connecting box main body are integrally formed, so that a complicated assembling process is avoided, the labor intensity is reduced, and the motor assembling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to an insulating junction box for a traction motor, belonging to the technical field of traction motors for rail transportation. Background Art

[0002] The design of the traction motor junction box for rail vehicles is affected by the following factors. First, the junction box is mounted on the bottom of the vehicle through the bogie suspension. However, the space under the vehicle is limited, so the design size of the traction motor is small. The space size is often restricted, and the size of the traction motor junction box is therefore limited. Second, the traction voltage level is high. If the motor junction box material is a conductor, the motor junction box design needs to meet the electrical clearance requirements. Third, the traction motor is installed on the train bogie, which will cause large vibrations during the train's operation. Therefore, the strength of the motor junction box needs to meet the vibration requirements. Fourth, the motor junction box needs to meet the sealing requirements to prevent water, iron powder, coal powder and other conductive media in the operating environment from entering the junction box.

[0003] To meet the above requirements, at present, the traction motor junction box is generally a metal junction box to ensure the strength requirements. Due to the electrical clearance requirements, it is generally large in size and cannot meet the requirements of a small installation space. The use of wire insulation wrapping requires the consumption of insulating materials and a complex insulation treatment process; at the same time, the assembly process of many assembly parts such as the motor terminal block and cable connector is complicated; a sealing gasket is often used to seal the junction box cover and the junction box body. The sealing gasket is provided with a through hole for the bolt to pass through. Under the action of the bolt tightening force, it is easy to cause local sealing failure of the sealing ring around the bolt. Utility Model Content

[0004] In order to overcome the problems existing in the prior art, the utility model provides an insulating junction box for a traction motor, and the specific technical solution is as follows.

[0005] An insulating junction box for a traction motor, comprising a connection box body and a cover body, wherein the connection box body is provided with a motor lead hole and a cable hole; characterized in that: the connection box body and the cover body are both made of insulating material, the connection box body is provided with a first embedded body and a second embedded body, the first embedded body is located at the edge of the connection box body, the first embedded body has a first internal screw hole for installing the cover body; the second embedded body is arranged corresponding to the inner cavity of the connection box body, the second embedded body has a second internal screw hole; the first embedded body and the second embedded body are integrally formed with the connection box body.

[0006] The above technical solution insulates the entire junction box, avoiding the bulky junction box required by the electrical clearance requirements of metal junction boxes and achieving a compact and lightweight design. Furthermore, the first embedded body with a first internal threaded hole facilitates securing the cover to the junction box body, while the second embedded body with a second internal threaded hole facilitates securing the motor leads within the inner cavity of the junction box body, enabling wiring operations. The first and second embedded bodies are embedded into the junction box body during its molding process, eliminating complex assembly processes, reducing labor intensity, and improving motor assembly efficiency.

[0007] Furthermore, the connection box body and the cover are both made of a resin material. Preferably, both are made of a basalt fiber-reinforced resin material. Basalt fiber-reinforced resin materials have excellent mechanical properties and can meet the high impact and insulation requirements of locomotive bogies for traction motors.

[0008] Preferably, the first embedded body and the second embedded body are both made of metal. Metal embedded bodies have high strength and good durability.

[0009] Furthermore, the connection box body is further provided with a third embedded body having the cable hole and a first internal screw hole for mounting the cover. The third embedded body provides a cable hole for securing the cable, and also helps to enhance the structural strength of the entire connection box body and the reliability of the connection between the cover and the connection box body. Preferably, the third embedded body is made of metal.

[0010] Furthermore, the cover is provided with a sealing groove opening toward the connection box body, within which a sealing ring is disposed. Furthermore, the cover is provided with a mounting hole corresponding to the first internal threaded hole, the mounting hole avoiding the sealing groove. Providing the sealing groove on the cover, while avoiding the mounting hole, helps improve the overall force uniformity of the sealing ring compared to existing technologies.

[0011] Compared with the prior art, the present invention has the following beneficial effects.

[0012] 1. The junction box is made of basalt fiber reinforced resin material with good mechanical properties, which can meet the high impact requirements of the locomotive bogie on the traction motor.

[0013] 2. The junction box is made of insulating material, which avoids the large size of the junction box caused by the electrical clearance requirements of the metal junction box, and achieves a small and lightweight design.

[0014] 3. The first embedded body, the second embedded body, the third embedded body and the connection box body are integrally formed, which avoids a complicated assembly process, reduces labor intensity and improves motor assembly efficiency.

[0015] 4. A sealing groove is provided on the cover body, and the sealing gasket is filled in the sealing groove during assembly. This can prevent the sealing ring at local positions close to the bolts of the junction box cover from being squeezed and deformed more seriously than at other positions when the bolts of the junction box cover are tightened. The sealing gaskets at these local positions are prone to failure, causing the motor junction box to fail due to sealing. The sealing ring of the utility model is a circular sealing ring in the sealing groove, and the overall force is more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the connection box body of the insulating junction box of the present utility model;

[0017] Figure 2 yes Figure 1 Schematic diagram of the middle AA section;

[0018] Figure 3 yes Figure 1 Schematic diagram of the middle BB section;

[0019] Figure 4 yes Figure 1 Schematic diagram of the middle CC section;

[0020] Figure 5 is a schematic diagram of the cover;

[0021] Figure 6 It is a cross-sectional schematic diagram of the cover body.

[0022] In the figure: connection box body 1, mounting hole 1.1, cover body 2, mounting through hole 2.1, motor lead hole 3, cable hole 4, first embedded body 5, second embedded body 6, third embedded body 7, first inner screw hole 8, second inner screw hole 9, inner cavity 10, sealing groove 11, sealing ring 12. DETAILED DESCRIPTION

[0023] The present invention is described in further detail below with reference to the accompanying drawings.

[0024] See also Figures 1-6 An insulating junction box for a traction motor comprises a junction box body 1 and a cover body 2, the junction box body 1 being provided with a motor lead hole 3 and a cable hole 4; the junction box body 1 and the cover body 2 are both made of insulating material, preferably, the junction box body 1 and the cover body 2 are both made of resin material, further preferably, the junction box body 1 and the cover body 2 are both made of basalt fiber reinforced resin material; the basalt fiber reinforced resin material has good mechanical properties and can meet the high impact and insulation requirements of the locomotive bogie for the traction motor.

[0025] The connection box body 1 is provided with a first embedded body 5, a second embedded body 6, and a third embedded body 7. The first embedded body 5 is located at the edge of the connection box body 1 and has a first internal screw hole 8 for installing the cover body 2; the second embedded body 6 is arranged corresponding to the inner cavity of the connection box body 1 and has a second internal screw hole 9; the third embedded body 7 has a cable hole 4 and a first internal screw hole 8 for installing the cover body 2. The first embedded body 5 with the first internal screw hole 8 facilitates fixing the cover body 2 on the connection box body 1; the second embedded body 6 with the second internal screw hole 9 facilitates fixing the motor lead (not shown) in the inner cavity 10 of the connection box body 1 to realize the wiring operation. The third embedded body 7 provides a cable hole 4 for fixing the cable (not shown). At the same time, the third embedded body 7 also helps to improve the structural strength of the entire connection box body 1 and also helps to enhance the connection reliability between the cover body 2 and the connection box body 1.

[0026] Preferably, the first embedded body 5, the second embedded body 6, and the third embedded body 7 are all made of metal. Metal embedded bodies have high strength and good durability. The first embedded body 5, the second embedded body 6, and the third embedded body 7 are integrally formed with the connection box body 1. That is, the first embedded body 5, the second embedded body 6, and the third embedded body 7 are embedded in the connection box body 1 during the molding process. This helps avoid complex assembly processes, reduces labor intensity, and improves motor assembly efficiency.

[0027] Preferably, the cover 2 is provided with a sealing groove 11 opening toward the connection box body 1, and a sealing ring 12 is disposed within the sealing groove 11. The cover 2 is also provided with a mounting through-hole 2.1 corresponding to the first internal threaded hole 8, which avoids the sealing groove 11. Providing the sealing groove 11 on the cover 2 and avoiding the mounting through-hole 2.1 helps improve the overall force uniformity of the sealing ring 12 compared to the prior art.

[0028] The wiring method of the junction box is as follows: the connection box body 1 is fixed to the bogie (not shown) through the mounting hole 1.1, the end of the motor lead of the traction motor (not shown) is fixed in the second embedded body 6 through the motor lead hole 3, and the end of the external cable is fixed in the second embedded body 6 through the cable hole 4, thereby realizing the wiring operation. At the same time, the external cable is firmly positioned in the cable hole 4 through the sealing joint (not shown).

[0029] The embodiments of the present invention are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other. The present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative and not restrictive. Under the guidance of the present invention, those skilled in the art can make many forms without departing from the scope of protection of the present invention and the scope of the claims, all of which fall within the scope of protection of the present invention.

Claims

1. An insulating junction box for a traction motor, comprising a junction box body (1) and a cover (2), wherein the junction box body (1) is provided with a motor lead hole (3) and a cable hole (4); characterized in that: The connection box body (1) and the cover body (2) are both made of insulating material. The connection box body (1) is provided with a first embedded body (5) and a second embedded body (6). The first embedded body (5) is located at the edge of the connection box body (1). The first embedded body (5) has a first internal screw hole (8) for installing the cover body (2); the second embedded body (6) is arranged corresponding to the inner cavity of the connection box body (1), and the second embedded body (6) has a second internal screw hole (9); the first embedded body (5) and the second embedded body (6) are integrally formed with the connection box body (1).

2. The insulating junction box for a traction motor according to claim 1, characterized in that: The connection box body (1) and the cover body (2) are both made of resin material.

3. The insulating junction box for a traction motor according to claim 2, characterized in that: The connection box body (1) and the cover body (2) are both made of basalt fiber reinforced resin material.

4. The insulating junction box for a traction motor according to claim 1, characterized in that: The first embedded body (5) and the second embedded body (6) are both made of metal.

5. The insulating junction box for a traction motor according to claim 1, characterized in that: The connection box body (1) is further provided with a third embedded body (7), and the third embedded body (7) has the cable hole (4) and a first internal screw hole (8) for mounting the cover body (2).

6. The insulating junction box for a traction motor according to claim 5, characterized in that: The third embedded body (7) is made of metal.

7. The insulating junction box for a traction motor according to claim 1, characterized in that: The cover body (2) is provided with a sealing groove (11) with an opening toward the connection box body (1), and a sealing ring (12) is provided in the sealing groove (11); the cover body (2) is provided with a mounting through hole (2.1) corresponding to the first internal screw hole (8), and the mounting through hole (2.1) avoids the sealing groove (11).

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