A brush holder assembly for a cooling fan of a new energy vehicle

Abstract

The utility model discloses a new energy automobile cooling fan is with brush holder assembly for assembling, through change the structure of compression spring, reduce the space of compression spring, increase the length of brush, improve the life of brush, adopt the split type inductance to the inductance one, and in the middle with soldering tin fixed, through the angle of inductance and soldering tin's tin content to control inductance fusing time, when motor block rotation, heat protection inductance disconnects first, forms open circuit, effectively prevents motor combustion risk.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicles, specifically to a brush holder assembly for a cooling fan in a new energy vehicle. Background Technology

[0002] With the development of new energy vehicles, they will gradually replace fuel vehicles. Since new energy vehicles do not have internal combustion engines, they cannot provide heat for the air conditioning system and require a heat pump system to provide heat for the air conditioning system. When the heat pump system is working, the cooling fan needs to work, which means that the fan runs for a longer time. The cooling fan also needs to work when the battery is charging, which greatly increases the working time of the cooling fan. The brushed motor of the traditional cooling fan no longer meets the lifespan requirements. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a brush holder assembly for a cooling fan in new energy vehicles. By changing the structure of the compression spring, reducing the space of the compression spring, increasing the length of the brush, and improving the life of the brush, the inductor adopts a split inductor, dividing the inductor into two parts and fixing them in the middle with solder. By controlling the angle of the inductor and the amount of solder, the melting time of the inductor is controlled. When the motor stalls, the thermal protection inductor disconnects first, forming an open circuit, effectively eliminating the risk of motor combustion.

[0004] The technical solution of this utility model is: a brush holder assembly for a cooling fan of a new energy vehicle, including a brush basin base plate, an inductor, a capacitor and a varistor;

[0005] Each of the four corners of the brush basin base plate is equipped with a set of electric brush holder assemblies; each set of electric brush holder assemblies includes a brush holder, an electric brush and a constant pressure spring.

[0006] The brush holder is integrally composed of an upper side, a lower side, a left side, and a right side, and the electric brush can be nested inside the brush holder;

[0007] The brush holder has an elongated through hole along its length on its upper side, and the electrical connection wire of the brush passes through the through hole.

[0008] The constant pressure spring is a stainless steel spring made of 0.06mm stainless steel strip, including a left drum, a right drum and a middle connecting plate. When the middle connecting plate is pulled, the left drum and the right drum will rotate under force and release the stainless steel strip from the outer ring, thereby extending the length of the middle connecting plate.

[0009] The left and right front ends of the brush holder each have a constant pressure spring support plate extending outwards. The inner surfaces of the left and right sides of the brush holder each have a recessed middle connecting piece groove facing outwards. The left roller is placed on the constant pressure spring support plate at the front end of the left side of the brush holder, and the right roller is placed on the constant pressure spring support plate at the front end of the right side of the brush holder. The tail end of the brush contacts the middle connecting piece of the constant pressure spring. When the brush is installed and inserted into the brush holder, it drives the middle connecting piece to extend and move towards the tail end of the brush holder.

[0010] Furthermore, it also includes a thermal protection inductor;

[0011] The thermal protection inductor includes a central magnetic core rod. The outer surface of the magnetic core rod is formed by two enameled wires wound in opposite directions. One end of each enameled wire is joined together at the middle of the magnetic core rod and then fixed together by solder to form a structure that is inclined upward relative to the bottom plate of the brush basin. This reduces electromagnetic interference to the commutation sparks of the intermediate commutator.

[0012] Furthermore, one end of each of the two enameled wires is joined together at the middle of the magnetic core rod and then tilted upwards at a 60-degree angle relative to the bottom plate of the brush basin.

[0013] Furthermore, one end of the magnetic core rod is machined into a semi-cylindrical limiting structure. This can fix the position of the thermal protection inductor and prevent rotation.

[0014] The beneficial effects of this invention are as follows: Existing traditional brushed motor cooling fans use helical springs for the pressure springs, while this brush holder assembly uses constant pressure springs. The constant pressure spring is installed inside the brush holder, occupying little space and allowing for increased brush length. The constant pressure spring ensures the brush is under constant force control throughout its effective lifespan, which is beneficial for brush wear life. The thermally fused inductor is located in the main circuit; compared to conventional inductors, the thermal fuse can protect the motor from combustion. Attached Figure Description

[0015] Figure 1 A schematic diagram of the assembly structure of the brush holder for cooling fans in new energy vehicles;

[0016] Figure 2 This is a schematic diagram of a constant pressure spring structure;

[0017] Figure 3 This is a schematic diagram of the brush structure;

[0018] Figure 4 This is a schematic diagram of the brush grip structure;

[0019] Figure 5 Assembly drawing for brush and brush holder;

[0020] Figure 6 Assembly drawing for brush, brush holder and constant pressure spring;

[0021] Figure 7 Assembly drawing for brush, brush holder and constant pressure spring;

[0022] Figure 8 for Figure 7 Sectional view along the AA direction;

[0023] Figure 9 This is a schematic diagram of the thermal protection inductor structure;

[0024] Figure 10 This is an assembly diagram for a thermal protection inductor.

[0025] In the diagram: 1 is the brush basin base plate, 2 is the brush holder, 3 is the brush, 4 is the constant force spring, 5 is the inductor, 6 is the thermally fused inductor, 7 is the capacitor, 8 is the varistor, 21 is the through hole, 22 is the electrical connection wire, 23 is the constant pressure spring support plate, 41 is the left drum, 42 is the right drum, 43 is the middle connecting piece, 61 is the magnetic core rod, and 62 is the enameled wire. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] like Figure 1 As shown, a brush holder assembly for a cooling fan in a new energy vehicle includes a brush basin base plate 1, an inductor 5, a thermal protection inductor 6, a capacitor 7, and a varistor 8.

[0028] A set of electric brush holder assemblies is installed at each of the four corners of the brush basin base plate 1. For example... Figure 2-8 As shown, each brush holder assembly includes a... Figure 4 The brush holder shown is 2, one as shown. Figure 3 The brush 3 shown and a brush such as Figure 2The constant pressure spring 4 is shown. The brush holder 2 is integrally composed of an upper side, a lower side, a left side, and a right side, and the brush 3 can be nested inside the brush holder 2. The upper side of the brush holder 2 has an elongated through hole 21 along its length, and the electrical connection wire 22 of the brush 3 passes through the through hole 21. The constant pressure spring 4 is a stainless steel spring made of 0.06mm stainless steel strip, including a left drum 41, a right drum 42, and a middle connecting piece 43. Pulling the middle connecting piece 43 will cause the left drum 41 and the right drum 42 to rotate under force, releasing the stainless steel strip from the outer ring, thereby extending the length of the middle connecting piece 43. The left and right front ends of the brush holder 2 each have a constant pressure spring support plate 23 extending outwards. The inner surfaces of both the left and right sides of the brush holder 2 have recessed middle connecting piece grooves facing outwards. The left-side roller 41 is placed on the constant pressure spring support plate at the front end of the left side of the brush holder 2, and the right-side roller 42 is placed on the constant pressure spring support plate at the front end of the right side of the brush holder 2. The tail end of the brush 3 contacts the middle connecting piece 43 of the constant pressure spring 4. When the brush 3 is inserted into the brush holder 2, it causes the middle connecting piece 43 to extend and move towards the tail end of the brush holder 2. By changing the structure of the pressure spring, reducing the space of the pressure spring, increasing the brush length, and improving the brush lifespan.

[0029] like Figure 9 As shown, the thermal protection inductor 6 includes a central magnetic core rod 61. The outer surface of the magnetic core rod 61 is formed by two enameled wires 62 wound in opposite directions. One end of each of the two enameled wires 62 is joined together at the middle of the magnetic core rod 61 and then fixed together by solder to form a 60-degree upward tilt relative to the brush basin base plate 1. This reduces electromagnetic interference to the commutation sparks of the intermediate commutator. Furthermore, one end of the magnetic core rod 61 is machined into a semi-cylindrical limiting structure, which can fix the position of the thermal protection inductor and prevent rotation.

[0030] The inductor is a split type, which is divided into two parts and fixed in the middle with solder. The inductor melting time is controlled by controlling the inductor angle and the amount of solder. When the motor stalls, the thermal protection inductor disconnects first, forming an open circuit, effectively eliminating the risk of motor combustion.

[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A brush holder assembly for a cooling fan in a new energy vehicle, comprising a brush holder base plate (1), an inductor (5), a capacitor (7), and a varistor (8). characterized in that A set of electric brush holder assemblies is provided at each of the four corners of the brush basin base plate (1); each set of electric brush holder assemblies includes a brush holder (2), an electric brush (3) and a constant pressure spring (4). The brush holder (2) is integrally composed of an upper side, a lower side, a left side and a right side, and the electric brush (3) can be nested inside the brush holder (2); The brush holder (2) has a long through hole (21) along its length on its upper side, and the electrical connection wire (22) of the brush (3) passes through the through hole (21). The constant pressure spring (4) is a stainless steel spring made of 0.06mm stainless steel strip, including a left drum (41), a right drum (42) and a middle connecting piece (43). When the middle connecting piece (43) is pulled, the left drum (41) and the right drum (42) will be rotated by force to release the stainless steel strip from the outer ring, thereby extending the length of the middle connecting piece (43). The left and right front ends of the brush holder (2) are respectively extended outward by a constant pressure spring support plate (23). The inner surfaces of the left and right sides of the brush holder (2) are recessed outward by a middle connecting piece movable groove. The left roller (41) is placed on the constant pressure spring support plate at the front end of the left side of the brush holder (2), and the right roller (42) is placed on the constant pressure spring support plate at the front end of the right side of the brush holder (2). The tail end of the brush (3) contacts the middle connecting piece (43) of the constant pressure spring (4). When the brush (3) is installed and inserted into the brush holder (2), it drives the middle connecting piece (43) to extend and move towards the tail end of the brush holder (2).

2. The brush holder assembly for a cooling fan of a new energy vehicle according to claim 1, characterized in that: It also includes a thermal protection inductor (6); The thermal protection inductor (6) includes a central magnetic core rod (61). The outer surface of the magnetic core rod (61) is formed by two enameled wires (62) wound in opposite directions. One end of the two enameled wires (62) is joined together in the middle of the magnetic core rod (61) and then fixed together by solder to form a structure that is inclined upward relative to the bottom plate (1) of the brush basin.

3. The brush holder assembly for a cooling fan of a new energy vehicle according to claim 2, characterized in that: One end of the two enameled wires (62) is joined together at the middle of the magnetic core rod (61) and then tilted upward at 60 degrees relative to the bottom plate (1) of the brush basin.

4. The brush holder assembly for a cooling fan of a new energy vehicle according to claim 2, characterized in that: One end of the magnetic core rod (61) is machined into a semi-cylindrical limiting structure.

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