Compact carbon brush holder and corresponding window lift motor

Abstract

The utility model relates to a compact carbon brush holder, including installation platform and containing main part, the central region of installation platform is provided with shaft hole, containing main part has the outer casing and is enclosed by the inner chamber formed by outer casing, the outer casing extends downward from the lower surface of installation platform and downward extends the preset length, the inner chamber is provided with carbon brush mounting seat and several electronic components fixed seat, the edge between outer casing and installation platform is ladder -like, make compact carbon brush holder when installing on motor shell, the outer casing is located the inside of motor shell while the installation platform is located the outside of motor shell. The utility model also provides corresponding car window lifting motor. Based on the specific design of installation platform and containing main part of carbon brush holder, carbon brush sinks, saves the axial space, carbon brush holder and motor shell cooperation length increase, are favorable to the promotion product stability, carbon brush and commutator cooperation place in motor shell metal cavity, are favorable to the improvement product's EMC performance.

Description

Technical Field

[0001] This utility model belongs to the field of automotive technology, specifically relating to a compact carbon brush holder and a corresponding window lift motor. Background Technology

[0002] With the trend of miniaturization and lightweighting in the automotive industry, motors used in automotive window regulators are also facing the same problem: how to reduce the size of the motor as much as possible while maintaining existing performance has become a direction that the industry is constantly exploring.

[0003] Traditional carbon brush holders are mostly installed on the outside of the stator housing. The carbon brush holder needs to be installed with an interference fit with the stator housing. There is an unused cavity between the carbon brush holder and the stator magnet, which wastes axial space and is not conducive to shortening the axial length of the motor. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a compact carbon brush holder that reduces the space occupied by the motor and a corresponding window lift motor.

[0005] To solve the above-mentioned technical problems, the first aspect of this utility model provides a compact carbon brush holder, the main features of which are: a mounting platform and a receiving body; a shaft hole is provided in the central area of ​​the mounting platform; the receiving body has an outer shell and an inner cavity formed by the outer shell; the outer shell extends downward from the lower surface of the mounting platform by a predetermined length; a carbon brush mounting seat for mounting carbon brushes and several electronic component fixing seats are provided in the inner cavity; the edges of the outer shell and the mounting platform are stepped, so that when the compact carbon brush holder is mounted on a motor housing, the outer shell is located inside the motor housing while the mounting platform is located outside the motor housing.

[0006] Preferably, the carbon brush mounting base is symmetrically distributed around the shaft hole, but it can also be distributed asymmetrically.

[0007] Preferably, the upper surface of the mounting platform is provided with a cylindrical body extending upward around the shaft hole.

[0008] Preferably, a varistor is provided on the upper surface of the mounting platform.

[0009] Preferably, the electronic components include one or more of resistors, inductors, capacitors, PTCs, PCBs, and pins.

[0010] The second aspect of this utility model provides a car window lift motor, characterized in that it includes a motor housing and a compact carbon brush holder, a motor assembly is disposed inside the motor housing, the motor assembly includes a motor shaft and a commutator mounted on the motor shaft, the mounting platform is located outside the motor housing, the motor shaft passes through the shaft hole of the compact carbon brush holder, and the outer shell of the carbon brush holder is located inside the motor housing, such that the carbon brushes in the inner cavity of the receiving body contact the commutator inside the motor housing.

[0011] Preferably, the motor housing is a metal motor housing.

[0012] The compact carbon brush holder and corresponding window lift motor of this utility model, based on the specific design of the carbon brush holder mounting platform and housing body, allow the carbon brushes and the commutator that matches the carbon brushes to sink, thereby saving axial space; at the same time, the increased mating length between the carbon brush holder and the motor housing helps to improve the stability of the product; in addition, the carbon brushes and commutator mating are located in the metal cavity of the motor housing, which helps to improve the EMC performance of the product. Attached Figure Description

[0013] Figure 1 This is a front structural diagram of the compact carbon brush holder of this utility model.

[0014] Figure 2 This is a schematic diagram of the reverse side structure of the compact carbon brush holder of this utility model.

[0015] Figure 3 This is a partial structural diagram of the compact carbon brush holder of this utility model after it is installed on the window lift motor. Detailed Implementation

[0016] To make the technical problem solved by this utility model clearer, the present utility model is further described below with reference to embodiments and accompanying drawings. The specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model.

[0017] like Figures 1 to 2 The image shows an embodiment of the compact carbon brush holder 1 of this utility model. The compact carbon brush holder 1 includes a mounting platform 2 and a housing body 3, as shown... Figure 2 As shown, the central area of ​​the mounting platform 2 is provided with a shaft hole 10 for mounting a motor shaft, and the upper surface of the mounting platform 2 is provided with a cylindrical body 9 extending upward around the shaft hole 10.

[0018] like Figure 2As shown, the receiving body 3 has an outer shell 12 and an inner cavity formed by the outer shell 12. The outer shell 12 extends downward from the lower surface of the mounting platform 2 by a predetermined length. The inner cavity is provided with a carbon brush mounting seat for mounting the carbon brush 6 and several electronic component fixing seats. The carbon brush mounting seat can constrain the movement of the carbon brush. The edges of the outer shell 12 and the mounting platform 2 are stepped, so that when the compact carbon brush holder 1 is mounted on the motor housing, the outer shell 12 is located inside the motor housing while the mounting platform 2 is located outside the motor housing.

[0019] Based on this utility model, the carbon brush holder can achieve carbon brush sinking, freeing up the space in the upper part of the carbon brush holder, saving axial space, and enabling the expansion of more functions. At the same time, it requires minimal modification to the carbon brush holder structure, which is conducive to product platformization. The main body 3 of the carbon brush holder is inserted into the motor housing 13, increasing the length of the mating with the motor housing and improving product stability. Meanwhile, since both the carbon brush and the commutator are located inside the motor metal housing, the electromagnetic radiation generated by the friction of the carbon brush and the commutator during operation will be reflected by the motor metal housing, achieving the purpose of radiation shielding and optimizing the product's EMC.

[0020] like Figure 2 As shown, the carbon brush mounting base is used to install the carbon brush 6, and the carbon brush holders are symmetrically distributed around the shaft hole 10.

[0021] like Figure 1 As shown, a varistor 7 is provided on the upper surface of the mounting platform 2.

[0022] Several electronic components include one or more of the following: resistor, inductor, capacitor, PTC, PCB, and pins, such as Figure 2 As shown, not all of the components described are listed in the embodiments of this utility model; the required electronic components can be selected as needed. All electronic components are loose, with no excess metal sheets, and are connected only by welding hooks to the power supply metal sheet 11.

[0023] like Figure 3The image shows a specific embodiment of the window lift motor of this utility model. The window lift motor includes a motor housing 13 and the aforementioned compact brush holder 1. A motor assembly is housed within the motor housing. The motor assembly includes a motor shaft 14 and a commutator 15 mounted on the motor shaft. The mounting platform 2 is located outside the motor housing. The motor shaft passes through the shaft hole 10 of the compact brush holder 1 via a bearing 8. The outer shell 12 of the brush holder 1 is located inside the motor housing 13, such that the carbon brushes within the inner cavity of the housing 3 contact the commutator 15 inside the motor housing. The motor housing is a metal motor housing. Therefore, the compact brush motor of this utility model can be used with the motor housing and commutator to integrate various electronic components.

[0024] The compact carbon brush holder and corresponding window lift motor of this utility model, based on the specific design of the carbon brush holder mounting platform and housing body, allow the carbon brushes and the commutator that matches the carbon brushes to sink, thereby saving axial space; at the same time, the increased mating length between the carbon brush holder and the motor housing is beneficial to improving product stability; in addition, the carbon brushes and commutator mating within the metal cavity of the motor housing is beneficial to improving the product's EMC performance.

[0025] The above descriptions are specific embodiments of this utility model and do not constitute a limitation on the scope of protection of this utility model. Any modifications and variations made to the technical concept of this utility model should be included within the scope of protection of this utility model.

Claims

1. A compact carbon brush holder characterized by, The device includes a mounting platform and a housing. The mounting platform has a central hole. The housing has an outer shell and an inner cavity formed by the outer shell. The outer shell extends downward from the lower surface of the mounting platform by a predetermined length. The inner cavity is provided with a carbon brush mounting base for mounting carbon brushes and several electronic component mounting bases. The edges of the outer shell and the mounting platform are stepped, so that when the compact carbon brush holder is mounted on the motor housing, the outer shell is located inside the motor housing while the mounting platform is located outside the motor housing.

2. The compact carbon brush holder of claim 1, wherein, The upper surface of the mounting platform is provided with a cylindrical body extending upward around the shaft hole.

3. The compact carbon brush holder of claim 1, wherein, A varistor is provided on the upper surface of the installation platform.

4. The compact carbon brush holder of claim 1, wherein, Several electronic components include one or more of the following: resistor, inductor, capacitor, PTC, PCB, and pins.

5. A window lift motor characterized by, The invention includes a motor housing and a compact brush holder according to any one of claims 1 to 4, wherein a motor assembly is disposed within the motor housing, the motor assembly includes a motor shaft and a commutator mounted on the motor shaft, the mounting platform is located outside the motor housing, the motor shaft passes through the shaft hole of the compact brush holder, and the outer shell of the brush holder is located inside the motor housing, such that the carbon brushes within the inner cavity of the receiving body contact the commutator inside the motor housing.

6. The window lift motor according to claim 5, characterized in that, The motor housing is a metal motor housing.

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