Automobile direct current motor carbon brush

Abstract

The utility model discloses a car DC motor carbon brush relates to the field of car motor. The car DC motor carbon brush includes carbon brush body, and carbon brush body outside sleeve joint carbon brush holder, and carbon brush holder one side swing joint fixed cover. The inner side of fixed cover is equipped with the joint groove, and the both sides of joint groove have the insertion piece and are inserted in carbon brush holder, and the end of insertion piece has the clamping block and carbon brush holder joint. Carbon brush body one side is equipped with connecting column, spring and insert piece, and insert piece is inserted in joint groove, and carbon brush holder one side is equipped with the insertion groove with the notching, and insertion piece is inserted in insertion groove, and clamping block is jointed in the notching. The car DC motor carbon brush can take out spring and carbon brush body simultaneously through the separation of clamping block from the notching and insertion groove, and can replace spring alone through the rotation of connecting column from carbon brush body and the extraction of insert piece from joint groove, and does not need to disassemble a large number of components, greatly simplifies the replacement process, and reduces the maintenance difficulty and cost.

Description

Technical Field

[0001] This utility model relates to the field of automotive motors, and in particular to carbon brushes for automotive DC motors. Background Technology

[0002] In automotive DC motors, carbon brushes are one of the key components, responsible for introducing current into the rotating armature windings and ensuring the motor can operate continuously and stably. Existing automotive DC motor carbon brush structures typically involve mounting the brush body on a brush holder and using springs to provide appropriate pressure, ensuring good contact between the brush and the commutator.

[0003] However, in actual use, springs will gradually fail due to prolonged operation, frequent extension and contraction, and environmental factors. Once the spring fails, the contact pressure between the carbon brush and the commutator cannot be effectively guaranteed, leading to problems such as poor contact and increased electrical sparking, which in turn affects the performance and lifespan of the motor.

[0004] However, existing carbon brush designs often make spring replacement extremely difficult, typically requiring the disassembly of numerous components, sometimes even replacing the undamaged carbon brush itself along with the brush. The spring cannot be replaced separately, which not only increases maintenance costs and time but can also lead to new problems due to improper maintenance. Therefore, developing a carbon brush for automotive DC motors that can effectively solve these problems is of significant practical importance. Utility Model Content

[0005] The purpose of this invention is to provide carbon brushes for automotive DC motors, in order to solve the problem that the existing carbon brush structure design often makes the replacement of the spring extremely difficult. It usually requires the disassembly of a large number of parts, and may even require the replacement of the undamaged carbon brush body together, rather than replacing the spring separately, which increases maintenance costs and time.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An automotive DC motor carbon brush includes a carbon brush body, a carbon brush holder is sleeved on the outer side of the carbon brush body, a fixed cover is movably connected to one side of the carbon brush holder, a snap-fit ​​groove is provided on the inner side of the fixed cover for installing the carbon brush body, and insertion blocks are fixedly connected to both sides of the snap-fit ​​groove, the insertion blocks are inserted into the carbon brush holder, and a locking block is fixedly connected to the end of the insertion block, the locking block engaging with the carbon brush holder.

[0007] Preferably, a connecting post is threaded onto one side of the carbon brush body.

[0008] Preferably, a spring is provided on one side of the connecting post, and one end of the spring is fixedly connected to the connecting post.

[0009] Preferably, the other end of the spring is fixedly connected to a insert, which is inserted into a snap-fit ​​groove.

[0010] Preferably, the carbon brush holder has a insertion groove on one side, and a notch is provided at the end of the insertion groove.

[0011] Preferably, the plug block is inserted into the plug slot.

[0012] Preferably, the locking block abuts against the insertion slot, and the locking block engages with the notch.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. When the carbon brush of this automotive DC motor fails, simply operate the fixing cover to disengage the clip from the notch and the insertion slot, remove the fixing cover, and the spring and carbon brush body can be pulled out simultaneously. By unscrewing the connecting post from the carbon brush body and pulling the insert out of the insertion slot, the spring can be replaced separately without disassembling a large number of parts, greatly simplifying the replacement process and reducing maintenance difficulty and cost.

[0015] 2. The carbon brush for the automotive DC motor has a fixed cover that is securely connected to the carbon brush holder via a plug and a clip. The clip slot can accurately install the carbon brush body. The spring is reasonably connected to the carbon brush body and the fixed cover via a connecting post and a insert. The overall structure is compact and stable, and can work normally in the complex working environment of the car, ensuring the normal function of the carbon brush. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the connection structure between the carbon brush body and the fixing cover of this utility model;

[0019] Figure 3 This is a schematic diagram of the carbon brush holder structure of this utility model.

[0020] In the diagram: 1. Carbon brush body; 11. Connecting post; 12. Spring; 13. Insert; 2. Carbon brush holder; 21. Insertion slot; 22. Notch; 3. Fixing cover; 31. Snap-fit ​​slot; 32. Insertion block; 33. Snap-fit ​​block. Detailed Implementation

[0021] 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.

[0022] Example 1: This utility model provides the following... Figures 1-3 The carbon brush for the automotive DC motor shown includes a carbon brush body 1, a carbon brush holder 2 sleeved on the outside of the carbon brush body 1, a fixing cover 3 movably connected to one side of the carbon brush holder 2, a snap-fit ​​groove 31 provided on the inner side of the fixing cover 3, the snap-fit ​​groove 31 is used to install the carbon brush body 1, and plug-in blocks 32 are fixedly connected to both sides of the snap-fit ​​groove 31 respectively, the plug-in blocks 32 are inserted into the carbon brush holder 2, and a locking block 33 is fixedly connected to the end of the plug-in block 32, the locking block 33 is engaged with the carbon brush holder 2.

[0023] Furthermore, a connecting post 11 is threaded onto one side of the carbon brush body 1.

[0024] Furthermore, a spring 12 is provided on one side of the connecting post 11, and one end of the spring 12 is fixedly connected to the connecting post 11.

[0025] Furthermore, the other end of the spring 12 is fixedly connected to a insert 13, which is inserted into the snap-fit ​​groove 31. When the spring 12 fails, simply operate the fixing cover 3 to disengage the snap-fit ​​block 33 from the notch 22 and the snap-fit ​​groove 21, remove the fixing cover 3, and simultaneously pull out the spring 12 and the carbon brush body 1. By unscrewing the connecting post 11 from the carbon brush body 1 and pulling out the insert 13 from the snap-fit ​​groove 31, the spring 12 can be replaced separately without disassembling a large number of parts, greatly simplifying the replacement process and reducing maintenance difficulty and cost.

[0026] Example 2: This utility model provides the following... Figures 1-3 The carbon brush for the automotive DC motor shown includes a carbon brush body 1, a carbon brush holder 2 sleeved on the outside of the carbon brush body 1, a fixing cover 3 movably connected to one side of the carbon brush holder 2, a snap-fit ​​groove 31 provided on the inner side of the fixing cover 3, the snap-fit ​​groove 31 is used to install the carbon brush body 1, and plug-in blocks 32 are fixedly connected to both sides of the snap-fit ​​groove 31 respectively, the plug-in blocks 32 are inserted into the carbon brush holder 2, and a locking block 33 is fixedly connected to the end of the plug-in block 32, the locking block 33 is engaged with the carbon brush holder 2.

[0027] Furthermore, a insertion groove 21 is provided on one side of the carbon brush holder 2, and a notch 22 is provided at the end of the insertion groove 21.

[0028] Furthermore, the plug block 32 is plugged into the plug slot 21.

[0029] Furthermore, the locking block 33 movably abuts against the insertion slot 21, and the locking block 33 is engaged with the notch 22. The fixing cover 3 is securely connected to the carbon brush holder 2 through the insertion block 32 and the locking block 33. The locking slot 31 can accurately install the carbon brush body 1. The spring 12 is reasonably connected to the carbon brush body 1 and the fixing cover 3 through the connecting post 11 and the insert 13. The overall structure is compact and stable, and can work normally in the complex working environment of the car, ensuring the normal function of the carbon brush.

[0030] When the automotive DC motor is running normally, the spring 12 is in a normal compressed state, applying a certain pressure to the carbon brush body 1 through the connecting post 11, so that the carbon brush body 1 is tightly attached to the commutator, ensuring that the current can be stably transmitted from the carbon brush to the armature winding, realizing the normal operation of the motor. The fixing cover 3 is inserted into the insertion slot 21 of the carbon brush holder 2 through the insertion block 32, and the locking block 33 is locked at the notch 22, which firmly fixes the fixing cover 3 on the carbon brush holder 2. The locking slot 31 accurately fixes the carbon brush body 1 in the appropriate position, and the insert 13 is inserted into the locking slot 31, working together with the spring 12 and the connecting post 11 to maintain the stability of the entire carbon brush structure.

[0031] When spring 12 fails due to prolonged use or other reasons, the pressure it provides is insufficient to meet the contact requirements between the carbon brush and the commutator. In this case, maintenance personnel can apply external force by operating the fixing cover 3 to disengage the locking block 33 from the notch 22, then pull the insertion block 32 out of the insertion slot 21 and remove the fixing cover 3. Simultaneously, spring 12 and carbon brush body 1 can be pulled out. By unscrewing the connecting post 11 from the carbon brush body 1 and pulling the insert 13 out of the locking slot 31, the connection between spring 12 and carbon brush body 1 is broken, allowing for easy replacement of spring 12. After replacing the spring 12, follow the reverse steps to tighten the connecting post 11 of the new spring 12 onto the carbon brush body 1, reinsert the insert 13 into the snap-fit ​​groove 31, and then align the insert block 32 of the fixing cover 3 with the snap-fit ​​groove 21 and insert it. At the same time, the carbon brush body 1 slides into the carbon brush holder 2, ensuring that the snap-fit ​​block 33 is engaged with the notch 22. This completes the installation of the fixing cover 3, restoring the carbon brush to its normal working state and continuing to provide stable current transmission to the automotive DC motor.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A carbon brush for an automotive DC motor, comprising a carbon brush body (1), wherein a carbon brush holder (2) is sleeved on the outer side of the carbon brush body (1), characterized in that, A fixed cover (3) is movably connected to one side of the carbon brush holder (2). A snap-fit ​​groove (31) is provided on the inner side of the fixed cover (3). The snap-fit ​​groove (31) is used to install the carbon brush body (1). Insertion blocks (32) are fixedly connected to both sides of the snap-fit ​​groove (31). The insertion blocks (32) are inserted into the carbon brush holder (2). A locking block (33) is fixedly connected to the end of the insertion block (32). The locking block (33) is snapped into the carbon brush holder (2).

2. The automotive DC motor carbon brush according to claim 1, characterized in that, A connecting post (11) is threaded onto one side of the carbon brush body (1).

3. The automotive DC motor carbon brush according to claim 2, characterized in that, A spring (12) is provided on one side of the connecting post (11), and one end of the spring (12) is fixedly connected to the connecting post (11).

4. The automotive DC motor carbon brush according to claim 3, characterized in that, The other end of the spring (12) is fixedly connected to a insert (13), which is inserted into the snap-fit ​​groove (31).

5. The automotive DC motor carbon brush according to claim 1, characterized in that, The carbon brush holder (2) has a insertion groove (21) on one side, and a notch (22) is provided at the end of the insertion groove (21).

6. The automotive DC motor carbon brush according to claim 5, characterized in that, The plug block (32) is inserted into the plug slot (21).

7. The automotive DC motor carbon brush according to claim 5, characterized in that, The locking block (33) is in contact with the insertion slot (21), and the locking block (33) is engaged in the notch (22).

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