High-strength low-deformation slot commutator

Abstract

This utility model discloses a high-strength, low-deformation slotted commutator, relating to the field of commutator technology. Specifically, it includes an integrally injection-molded bakelite powder matrix and slotted commutator segments arranged circumferentially on the outer circumference of the bakelite powder matrix. Interval slots with an insulating layer attached to the inner surface are provided between adjacent slotted commutator segments. A deformable elliptical box is installed on the inner side of each slotted commutator segment, and the elliptical box is inserted into the outer circumference of the bakelite powder matrix. A suspended cooling box is provided inside the elliptical box, which stores non-conductive coolant. The cooling box can melt and rupture when overheated, allowing the non-conductive coolant to flow out, thus accelerating heat exchange efficiency. Multiple spiral-shaped hot-melt wires are installed between the outer side of the cooling box and the inner wall of the elliptical box. A ventilation slot penetrating the bakelite powder matrix is ​​provided on the outer side of the elliptical box away from the slotted commutator segments, and a heat sink is provided within the ventilation slot to cool the elliptical box.

Description

Technical Field

[0001] This utility model relates to the field of commutator technology, specifically a high-strength, low-deformation slot-type commutator. Background Technology

[0002] The slot commutator is a key component in DC motors and some AC commutator motors. It is used to achieve directional commutation of armature winding current and ensure continuous motor operation.

[0003] The utility model patent with publication number "CN210926566U" discloses a high-strength, low-deformation slotted steering gear, comprising an integrally injection-molded bakelite powder matrix and slotted commutator segments arranged circumferentially on the outer circumference of the bakelite powder matrix. Adjacent slotted commutator segments are insulated from each other by inter-segment slots. The key feature is that, except for the top outer circumference where the welding wire step is set, the remaining portion of the slotted commutator segment has the same radial thickness along its entire height. Slots are provided on the left and right sides of the slotted commutator segment near the inner side, extending through the entire height of the slotted commutator segment. The slots are positioned parallel to the axial direction of the slotted commutator. A sleeve is provided on the inner side of the slotted commutator segment, with the outer circumference of the sleeve abutting against the inner side of the slotted commutator segment. A connector extends outward from the outer circumference of the sleeve at the midpoint between two adjacent slotted commutator segments, and the opposing slots of the two adjacent slotted commutator segments are inserted into the sides of the connector.

[0004] The device has shortcomings in use. Due to the limited deformation of the bushing, it cannot make the cylindrical surface of the slot commutator reach the standard circular shape when the slot commutator segment is severely deformed due to overheating. Moreover, it must be stopped from use in time after overheating, otherwise it will cause irreversible damage to the slot commutator segment, reduce the efficiency and increase the cost of use. To address these issues, we propose a high-strength, low-deformation slot commutator. Utility Model Content

[0005] This invention provides a high-strength, low-deformation slot-type commutator, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A high-strength, low-deformation slotted commutator includes an integrally injection-molded bakelite powder matrix and slotted commutator segments arranged circumferentially on the outer circumference of the bakelite powder matrix. Interval slots with an insulating layer attached to the inner surface are provided between adjacent slotted commutator segments. A deformable elliptical box is installed on the inner side of the slotted commutator segments, and the elliptical box is inserted into the outer circumference of the bakelite powder matrix.

[0008] The elliptical box contains a suspended cooling box, which stores non-conductive coolant and is designed to melt and crack if overheated.

[0009] Multiple spiral-shaped hot fuses are installed between the outer side of the cooling box and the inner wall of the elliptical box.

[0010] The bakelite powder matrix has ventilation holes and slots that penetrate the bakelite powder matrix on the outer side of the elliptical box away from the slotted commutator segment.

[0011] The ventilation slots are equipped with heat sinks to cool the elliptical box.

[0012] Preferably, the groove is in the shape of a spiral with a certain angle.

[0013] Preferably, the interior of the elliptical box is a vacuum, and the elliptical box is a discontinuous elliptical cylinder. The break in the elliptical box is installed inside the slotted commutator segment, forming a closed space between it and the slotted commutator segment.

[0014] Preferably, the ventilation slot is arc-shaped.

[0015] Preferably, the heat sink is provided in multiple and is vertically mounted on the outer wall of the elliptical box, and is located in the ventilation slot.

[0016] Preferably, the inner wall of the elliptical box is provided with a capillary adsorption layer that allows capillary action to occur.

[0017] Preferably, the force generated by the elastic deformation of the hot melt wire is perpendicular to the tangent of the inner sidewall of the elliptical box.

[0018] This utility model has the following beneficial effects:

[0019] 1. This high-strength, low-deformation slot commutator features an elliptical box installed inside the slot commutator segments. When the slot commutator segments overheat and deform, the elliptical box bends inward, maintaining the cylindrical shape of the slot commutator. The elliptical box is made of a thermally conductive material, which transfers the heat generated by the slot commutator segments to the heat sink on the outside of the elliptical box. The heat sink is connected to the ventilation slot, and the airflow in the ventilation slot carries away the heat from the heat sink, reducing deformation of the slot commutator segments due to overheating and thus improving efficiency.

[0020] 2. This high-strength, low-deformation slotted commutator, through the structure of the slots, allows the arc of the slot surface to accelerate airflow when the bakelite matrix rotates. This can carry away the carbon powder generated when the carbon brush contacts the slotted commutator segment, thereby reducing wear between the carbon brush and the slotted commutator segment. In addition, the flowing air can also cool the slotted commutator segment and prevent it from deforming.

[0021] 3. This high-strength, low-deformation slotted commutator uses the melting of the hot fuse when the temperature is too high to allow the cooling box to contact the bottom surface of the elliptical box. The excessively high temperature causes the cooling box to melt, releasing the non-conductive coolant stored inside. Under the action of the capillary adsorption layer provided inside the elliptical box, the heat exchange efficiency is accelerated, resulting in better heat dissipation. Attached Figure Description

[0022] Figure 1 This is a top view of the structure of this utility model;

[0023] Figure 2 This is a side view of the structure of this utility model;

[0024] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0025] Figure 4 This utility model Figure 3 A schematic diagram of the structure at point A.

[0026] In the diagram: 1. Bakelite powder matrix; 2. Groove; 3. Ventilation slot; 4. Heat sink; 5. Groove commutator; 6. Hot melt wire; 7. Cooling box; 8. Elliptical box; 9. Capillary adsorption layer. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1 to 3 A high-strength, low-deformation slotted commutator includes an integrally injection-molded bakelite powder matrix 1 and slotted commutator segments 5 arranged circumferentially on the outer circumference of the bakelite powder matrix 1. Interval slots 2 with an insulating layer attached to the inner surface are provided between adjacent slotted commutator segments 5. The key feature is that a deformable elliptical box 8 is installed on the inner side of each slotted commutator segment 5, and the elliptical box 8 is inserted into the outer circumference of the bakelite powder matrix 1. The elliptical box 8 has good thermal conductivity, allowing heat to be conducted to the elliptical box 8 when the slotted commutator segments 5 are hot. The elliptical box 8 dissipates heat through heat sinks 4 installed on its outer side. When the slotted commutator segments 5 deform due to heat, they compress the elliptical box 8, causing deformation and maintaining the cylindrical shape of the slotted commutator, thus reducing carbon brush wear and noise.

[0029] The elliptical box 8 is equipped with a suspended cooling box 7, which stores non-conductive coolant. The cooling box 7 can melt and crack when overheated. After the cooling box 7 melts and cracks, the non-conductive coolant flows out. The non-conductive coolant (such as fluorocarbon-based liquid, Sanhu New Material SH-IE-03 / SH-IE-08, waterless cooling oil, etc.) can directly contact the slotted commutator segment 5 and carry away the heat of the slotted commutator segment 5.

[0030] Multiple spiral hot-melt wires 6 are installed between the outer side of the cooling box 7 and the inner wall of the elliptical box 8. The spiral hot-melt wires 6 can generate elasticity and apply pressure to the elliptical box 8 to increase the friction between the elliptical box 8 and the bakelite powder substrate 1, thereby making its installation more stable and allowing the cooling box 7 to float inside the elliptical box 8. When the hot-melt wire 6 melts, the elliptical box 8 does not come into contact with the cooling box 7, thus providing a certain safety effect and producing a better heat dissipation effect when it overheats.

[0031] The bakelite powder matrix 1 has ventilation holes and slots 3 extending through it on the outer side of the elliptical box 8 away from the slotted commutator segment 5. The air flowing in the ventilation holes and slots 3 can carry away the heat from the elliptical box 8, cooling the elliptical box 8 and the slotted commutator segment 5. It can also form hot and cold ends with the slotted commutator segment 5, allowing the non-conductive coolant to achieve evaporation and condensation.

[0032] The ventilation slot 3 is equipped with heat sink 4 that can cool the elliptical box 8. The heat sink 4 is installed on the outside of the elliptical box 8 and can absorb the heat of the elliptical box 8. The heat exchange area is increased through the ventilation slot 3, thereby making the heat dissipation effect better and enabling a larger temperature difference between the hot end and the cold end.

[0033] Please see Figures 1 to 2 The slot 2 is in the shape of a spiral with a certain angle. When the bakelite powder matrix 1 rotates, the structure of the slot 2 itself can cause air convection, forming a guided airflow that carries away the carbon powder left by the carbon brush on the outer surface of the slot-shaped commutator 5. The flowing air can also carry away the heat of the slot-shaped commutator 5.

[0034] Please see Figures 1 to 4 The elliptical box 8 is a vacuum inside and is a discontinuous elliptical cylinder. The break in the elliptical box 8 is installed inside the slotted commutator segment 5, forming a closed space between it and the slotted commutator segment 5. The elliptical box 8 is elastic and can be squeezed inward by the deformation force generated when the slotted commutator segment 5 is overheated, so that the cylindrical surface of the slotted commutator is a standard circle. The vacuum inside the elliptical box 8 lowers the boiling point of the non-conductive coolant evaporation, thereby improving the heat exchange effect.

[0035] Please see Figures 1 to 4The ventilation slot 3 is arc-shaped, and the ventilation slot 3 can cool the heat sink 4 inside.

[0036] Please see Figures 1 to 4 The heat sink 4 is provided in multiple and is vertically installed on the outer wall of the elliptical box 8 and is located in the ventilation slot 3. The heat sink 4 installed on the outer wall of the elliptical box 8 can absorb the heat of the elliptical box 8. The temperature of the heat sink 4 is carried away by the air flow in the ventilation slot 3, thereby cooling the elliptical box 8.

[0037] Please see Figures 1 to 4 The inner wall of the elliptical box 8 is provided with a capillary adsorption layer 9 that can produce capillary phenomena. The temperature on the side where the heat sink 4 is located is lower than that on the side where the slotted commutator 5 is located. The capillary adsorption effect generated by the capillary adsorption layer 9 draws back the non-conductive coolant on the side of the elliptical box 8 near the heat sink 4, so that it can return to the hot end in a liquid state. The condensed non-conductive coolant can continue to vaporize and cool the slotted commutator 5.

[0038] Please see Figures 1 to 4 The force generated by the elastic deformation of the hot melt wire 6 is perpendicular to the tangent of the inner wall of the elliptical box 8, thereby making the elastic force of the hot melt wire 6 completely converted into pressure on the elliptical box 8 and the bakelite powder matrix 1, thus making its friction greater and more stable.

[0039] In summary, this high-strength, low-deformation slotted commutator, during use, accelerates airflow under the structural guidance of the slot 2 as the bakelite powder matrix 1 rotates at high speed. This airflow blows away the carbon powder left by the friction between the carbon brush and the slotted commutator segment 5, and also cools the slotted commutator segment 5. As the slotted commutator segment 5 continues to heat up, the elliptical box 8 in contact with it absorbs heat and transfers it to the heat sink 4 on one side of the elliptical box 8, where it is cooled through the ventilation slots 3. As the heat continues to rise, the slotted commutator segment 5 deforms, compressing the elliptical box 8. This deformation of the elliptical box 8 maintains the cylindrical shape of the slotted commutator. The circular shape reduces premature wear of the carbon brushes and noise generated when the carbon brushes rub against the slotted commutator 5. When the temperature inside the slotted commutator 5 continues to rise, the hot fuse 6 melts due to excessive temperature, causing the cooling box 7 to come into contact with the inner surface of the elliptical box 8. The cooling box 7 melts, causing the non-conductive coolant inside to flow out, cooling the elliptical box 8 and the slotted commutator 5. The temperature on the side where the heat sink 4 is located inside the elliptical box 8 is lower than the temperature on the side where the slotted commutator 5 is located. The capillary adsorption layer 9 can capillarily adsorb the coolant on the side of the heat sink 4, allowing the coolant to return to the slotted commutator 5 for vaporization, thus achieving cyclic cooling.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-strength low-deformation slot commutator, comprising an electric wood powder base (1) integrally pressure-injection molded and slot commutator segments (5) arranged in a circle on the outer circle of the electric wood powder base (1), and an inter-slot (2) with an insulating layer attached to the inner surface between adjacent slot commutator segments (5), characterized in that: The slotted commutator (5) is fitted with a deformable elliptical box (8) on its inner side, and the elliptical box (8) is inserted into the outer circumference of the bakelite powder substrate (1). The elliptical box (8) is provided with a suspended cooling box (7), which contains non-conductive coolant and can melt and crack if overheated. Multiple spiral-shaped hot fuses (6) are installed between the outer side of the cooling box (7) and the inner wall of the elliptical box (8); The bakelite powder substrate (1) is provided with a ventilation slot (3) through the bakelite powder substrate (1) on the outer side of the elliptical box (8) away from the slotted commutator (5). The ventilation slot (3) is provided with a heat sink (4) to cool the elliptical box (8).

2. The high-strength, low-deformation slot commutator according to claim 1, characterized in that: The groove (2) is in the shape of a spiral with a certain angle.

3. The high-strength, low-deformation slot commutator according to claim 2, characterized in that: The interior of the elliptical box (8) is a vacuum, and the elliptical box (8) is a discontinuous elliptical cylinder. The break point of the elliptical box (8) is installed inside the slotted commutator segment (5), forming a closed space between it and the slotted commutator segment (5).

4. The high-strength, low-deformation slot commutator according to claim 3, characterized in that: The ventilation slot (3) is arc-shaped.

5. The high-strength, low-deformation slot commutator according to claim 4, characterized in that: The heat sink (4) is provided in multiple and is vertically installed on the outer wall of the elliptical box (8), and is located in the ventilation slot (3).

6. The high-strength, low-deformation slot commutator according to claim 5, characterized in that: The inner wall of the elliptical box (8) is provided with a capillary adsorption layer (9) that can produce capillary action.

7. The high-strength, low-deformation slot commutator according to claim 6, characterized in that: The force generated by the elastic deformation of the hot melt wire (6) is perpendicular to the tangent of the inner wall of the elliptical box (8).

Images