Conductive Brush, Conductive Ring, Motor, Automobile and Preparation Method of the Conductive Brush

Abstract

The present invention relates to a conductive brush, a slip ring, a motor, an automobile and a preparation method of the conductive brush, and belongs to the technical field of bearing protection. The conductive brush includes a conductive fiber bundle and a fixing member for fixing the conductive fiber bundle, and the conductive fiber bundle is folded and placed in the fixing member. By folding the conductive fiber bundle and fixing the folded conductive fiber bundle, first, the contact area between the conductive fiber bundle and the fixing member is increased, and second, the conductive fiber bundles are wound around each other, thereby improving the stability of the conductive fiber bundle in the fixing member and preventing the conductive fiber bundle from being pulled out.

Description

Technical Field

[0001] The invention relates to a conductive brush, a conductive ring, a motor, an automobile and a method for preparing the conductive brush, and belongs to the technical field of bearing protection. Background Art

[0002] When the motor is changing frequency, the voltage on the shaft will increase. This is because the shaft voltage of the variable frequency motor is caused by the drive of the frequency converter. The current output by the frequency converter generates an induced voltage on the motor shaft due to the high-frequency switch. The generated shaft voltage will be released through the current through the bearing. During the current release, as the static charge accumulates, once the induced voltage on the motor shaft accumulates to a level sufficient to break through the oil film between the bearing balls, it will be discharged through the circuit with the smallest resistance, causing the surface of the bearing race, bearing balls and track to be corroded by electricity. This corrosion process is slow. In addition, during this process, it will be obvious that the power of the motor is getting smaller and smaller. When it stops working, the motor bearing is already damaged, which is manifested by black grease, electrical corrosion pits on the surface of the bearing race and balls, and the particles of the electrical corrosion pit layer are sealed in the bearing by the closed bearing. These reasons ultimately accelerate the shortening of the motor bearing life.

[0003] In order to prevent the occurrence of the above-mentioned electrical corrosion phenomenon, it is necessary to add a conductive device to the motor shaft. However, the conductive fiber bundle of the existing conductive brush is directly inserted into the metal sleeve, and then the metal sleeve is flattened by extrusion to be fixed by the conductive fiber bundle. Chinese patent application No. 201611177757.3 discloses the above solution. However, the conductive fiber bundle in this structure has poor stability and is easily pulled out of the copper sleeve. Summary of the invention

[0004] The object of the present invention is to provide a conductive brush which can prevent a conductive fiber bundle from being pulled out.

[0005] To achieve the above object, the present invention provides the following technical solution: a conductive brush, comprising a conductive fiber bundle and a fixing member for fixing the conductive fiber bundle, wherein the conductive fiber bundle is folded and placed in the fixing member.

[0006] Furthermore, the conductive fiber bundle includes a first folded portion and a second folded portion formed by folding, and the first folded portion and the second folded portion are arranged side by side in the width direction of the fixing member or are stacked in the thickness direction of the fixing member.

[0007] Furthermore, the conductive fiber bundle includes a first folding portion and a second folding portion formed after being folded, and the fixing member includes a first fixing portion for fixing the first folding portion and a second fixing portion for fixing the second folding portion, and the first fixing portion and the second fixing portion are stacked in the thickness direction of the fixing member.

[0008] Further, at least one of the first fixing part and the second fixing part is a collar.

[0009] Further, at least one of the first fixing part and the second fixing part is a covering member, and the covering member has an unfolded state and a folded state; the conductive fiber bundle is placed on the covering member in the unfolded state, and the conductive fiber bundle is fixed by the covering member in the folded state.

[0010] Further, the covering member includes a bearing part for placing the conductive fiber bundle and bending parts extending outward from both sides of the bearing part.

[0011] Further, the bending parts on both sides of the bearing part are arranged in a staggered manner.

[0012] Further, the fixing member further includes a folding part connecting the first fixing part and the second fixing part.

[0013] The present invention also provides a conductive ring, including a fixing cover and the above-mentioned conductive brush installed in the fixing cover.

[0014] The present invention also provides a motor, including the above-mentioned conductive ring installed on a bearing of the motor.

[0015] The present invention also provides an automobile, including the above-mentioned motor.

[0016] The present invention also provides a preparation method of a conductive brush, including:

[0017] Cutting the conductive fiber bundle;

[0018] Folding the conductive fiber bundle;

[0019] Fixing the folded conductive fiber bundle with a fixing member.

[0020] Further, the "fixing the folded conductive fiber bundle with a fixing member" specifically includes:

[0021] Installing the folded conductive fiber bundle on the fixing member, wherein the end of the conductive fiber bundle is not located inside the fixing member;

[0022] Squeezing / bending / bending the fixing member to clamp and fix the conductive fiber bundle.

[0023] Further, the folded conductive fiber bundles are arranged side by side in the width direction of the fixing member / stacked in the thickness direction of the fixing member.

[0024] The present invention also provides a preparation method of a conductive brush, including:

[0025] Cutting the conductive fiber bundle;

[0026] Provided is a fixing member, which includes a first fixing portion and a second fixing portion;

[0027] The conductive fiber bundle is fixed on the first fixing portion and the second fixing portion, wherein both ends of the conductive fiber bundle respectively extend beyond the first fixing portion and the second fixing portion;

[0028] Fold the fixing member with the conductive fiber bundle fixed thereon, so that the conductive fiber bundles are stacked in the thickness direction of the fixing member, and at least part of the first fixing portion and the second fixing portion are stacked or arranged in a staggered manner.

[0029] Further, the first fixing portion and the second fixing portion are collar rings, and the preparation method includes:

[0030] Thread the conductive fiber bundle through the first fixing portion and the second fixing portion in sequence, wherein both ends of the conductive fiber bundle respectively extend beyond the first fixing portion and the second fixing portion;

[0031] Extrude the first fixing portion and the second fixing portion to clamp the conductive fiber bundle;

[0032] Fold the conductive fiber bundle in the thickness direction of the fixing member, so that at least part of the first fixing portion and the second fixing portion overlap or are arranged in a staggered manner.

[0033] Further, the first fixing portion and the second fixing portion are covering members, and each covering member includes a bearing portion and bending portions extending outward from both sides of the bearing portion;

[0034] The preparation method includes:

[0035] Place the conductive fiber bundle on the bearing portion of the first fixing portion and the bearing portion of the second fixing portion, and the longitudinal direction of the conductive fiber bundle is the same as the longitudinal direction of the bearing portion, wherein both ends of the conductive fiber bundle respectively extend beyond the two bearing portions;

[0036] Fold the two bending portions above the conductive fiber bundle to fix the conductive fiber bundle on the bearing portion;

[0037] Fold the conductive fiber bundle in the thickness direction of the fixing member, so that at least part of the first fixing portion and the second fixing portion overlap or are arranged in a staggered manner.

[0038] The beneficial effects of the present invention are as follows: By folding the conductive fiber bundle and fixing the folded conductive fiber bundle through the fixing member, first, the contact area between the conductive fiber bundle and the fixing member is increased, and second, the conductive fiber bundles are wound around each other, thereby improving the stability of the conductive fiber bundle in the fixing member and preventing the conductive fiber bundle from being pulled out.

[0039] The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and implement it according to the content of the specification, the following describes the preferred embodiments of the present invention in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 Schematic structural diagram of a slip ring shown in an embodiment of the present invention;

[0041] Figure 2 For Figure 2 Partial schematic structural diagram of the shown conducting brush;

[0042] Figure 3 For Figure 1 Schematic structural diagram of the conducting brush combination in ;

[0043] Figures 4 to 7 For Figure 3 Schematic folding process diagram of the fixing member in ;

[0044] Figure 8 Schematic structural diagram of the second type of conducting brush in the present invention;

[0045] Figure 9 For Figure 8 Schematic structural diagram of the conducting brush after expansion shown in ;

[0046] Figure 10 Schematic expansion diagram of the third type of conducting brush of the present invention;

[0047] Figure 11 For Figure 9 Or Figure 10 Schematic expansion diagram after connection of multiple fixing members used in ;

[0048] Figure 12 Schematic diagram of the fourth type of conducting brush of the present invention;

[0049] Figure 13 Schematic diagram of the fifth type of conducting brush of the present invention;

[0050] Figure 14 Cross-sectional view of another fixing cover that can be used in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0051] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0052] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0053] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "coupled" should be understood in a broad sense. 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0055] Please refer to Figures 1 to 3 , the slip ring 100 of the present application includes a conductive brush 10 and a fixing cover 20 for installing the conductive brush 10. The conductive brush 10 includes a conductive fiber bundle 2 and a fixing member 11 for fixing the conductive fiber bundle 2. The arrangement of the conductive fiber bundle 2 can adopt a laminated arrangement or a side-by-side arrangement. Specifically, for example, the conductive fiber bundle 2 includes a first folded portion 21 and a second folded portion 22 after being folded. The first folded portion 21 and the second folded portion 22 are laminated in the thickness direction of the fixing member 11 (see Figure 8 the direction indicated by arrow a-a in Figure 13 ), or the first folded portion 21 and the second folded portion 22 are arranged side by side in the width direction of the fixing member 11 (see

[0056] the direction indicated by arrow b-b in

[0057] By folding the conductive fiber bundle 2 and fixing the folded conductive fiber bundle 2 through the fixing member 11, first, the contact area between the conductive fiber bundle 2 and the fixing member 11 is increased, and second, the conductive fiber bundles 2 are wound around each other, thereby improving the stability of the conductive fiber bundle 2 in the fixing member 11 and preventing the conductive fiber bundle 2 from being pulled out. Figure 1 andFigure 8 As shown, the conductive fiber bundle 2 can also be folded first and then installed in the fixing member 11, such as Figure 12 and Figure 13 shown.

[0058] Specifically, in one embodiment, please refer to Figure 3 and Figure 8 . The fixing member 11 includes a first fixing portion 111 for fixing the first folded portion 21 and a second fixing portion 112 for fixing the second folded portion 22. The first fixing portion 111 and the second fixing portion 112 are stacked in the thickness direction of the fixing member 11. The first fixing portion 111 and the second fixing portion 112 can have the same structure or different structures. By fixing the first folded portion 21 and the second folded portion 22 with the first fixing portion 111 and the second fixing portion 112 respectively, the stability of the conductive fiber bundle 2 in the fixing member 11 can be further improved.

[0059] It should be noted that the first fixing portion 111 and the second fixing portion 112 can overlap, or at least partially overlap, or be arranged in a front-back offset manner. However, regardless of whether the first fixing portion 111 and the second fixing portion 112 overlap, the first folded portion 21 and the second folded portion 22 of the conductive fiber bundle 2 overlap.

[0060] As described above, the first fixing portion 111 and the second fixing portion 112 can have the same structure or different structures. In the following two embodiments, the first fixing portion 111 and the second fixing portion 112 have the same structure and are symmetrically arranged.

[0061] Please refer to Figures 1 to 3 . In an alternative solution, the first fixing portion 111 and the second fixing portion 112 are both covering members. Specifically, the covering is a folding member. The covering members 111 and 112 have an unfolded state and a folded state; the conductive fiber bundle 2 is placed on the covering members 111 and 112 in the unfolded state, and the conductive fiber bundle 2 is fixed by the covering members 111 and 112 in the folded state.

[0062] In this embodiment, please refer to Figure 3 and Figure 4 . The covering members 111 and 112 include a bearing portion 113 for placing the conductive fiber bundle 2 and a bending portion 114 extending outward from both sides of the bearing portion 113. The bending portions 114 on both sides of the bearing portion 113 are arranged in an offset manner. By arranging the two bending portions 114 in an offset manner, the bending portions 114 are equivalent to fixing the conductive fiber bundle twice after folding, so as to improve the fixing strength. In other embodiments, the bending portion 114 can also be one or more. Similarly, if two bending portions 114 are provided, the two bending portions 114 can also be symmetrically arranged on both sides of the bearing portion 113.

[0063] For the convenience of assembly, the fixing member 11 further includes a folding portion 115 connecting the first fixing portion 111 and the second fixing portion 112. In this way, it is beneficial to the stamping forming of the fixing member 11. Of course, in other embodiments, the first fixing portion 111 and the second fixing portion 112 may also be two independent components, that is, there is no folding portion 115 provided between the first fixing member 11 and the second fixing member 112.

[0064] In this embodiment, the assembly method of the conductive fiber bundle 2 is as follows: Figure 4 When the first fixing portion 111 and the second fixing portion 112 are in the unfolded state, in this state, the conductive fiber bundle 2 is placed flat on the bearing portion 113 of the first fixing portion 111 and the bearing portion 113 of the second fixing member 11. Specifically, the first folding portion 21 of the conductive fiber bundle 2 is placed on the bearing portion 113 of the first fixing portion 111, the second folding portion 22 is placed on the bearing portion 113 of the second fixing portion 112, and both ends of the conductive fiber bundle 2 extend out of the first bearing portion 113 and the second bearing portion 113 respectively; the folding portion 115 is folded, that is, from Figure 4 state to Figure 5 the state shown, and then to Figure 6 the state shown. Figure 6 When the first fixing portion 111 and the second fixing portion 112 are in the folded state, at this time, the first folding portion 21 and the second folding portion 22 of the conductive fiber bundle 2 are respectively fixed by the corresponding first fixing portion 111 and the second fixing portion 112; then the first fixing portion 111 and the second fixing portion 112 in the folded state are folded by the folding portion 115 so that the two overlap in the thickness direction of the fixing member 11, as shown in Figure 7 and Figure 3 .

[0065] It should be noted that, as described in the background art, in the prior art, the assembly method of the conductive fiber bundle 2 and the metal sleeve is as follows: the conductive fiber bundle 2 is inserted into the metal sleeve. However, the process brought by this structure has the following problems. Since the diameter of the metal sleeve is usually less than 5 mm and the conductive fiber bundle 2 is soft, when the conductive fiber bundle 2 is inserted into the metal sleeve, the required alignment accuracy is very high, so the conventional automated assembly equipment cannot achieve it. In the existing production, the conductive fiber bundle 2 is manually inserted into the metal sleeve. However, compared with the automated equipment, the efficiency is greatly reduced. However, if a high-precision automated assembly equipment is used, the cost of the conductive brush 10 will be greatly increased, which is quite different from the industry positioning of the conductive brush 10. In this regard, in the above embodiments, by setting the first fixing portion 111 and the second fixing portion 112 of the fixing member 11 as covering members, especially folding members, the positioning accuracy problem in the prior art can be effectively solved, so that the conductive brush 10 can achieve automated production without increasing the production cost, and the production efficiency is improved.

[0066] It should also be noted that in other embodiments, the covering member may also be of other shapes. For example, the covering member finally forms a column-like structure. Specifically, when it is in the unfolded state, it can be a sheet-like body, and this sheet-like body can be bent. When the two ends of this sheet state are closed, it changes from the unfolded state to the covering state. When it is in the covering state, it clamps the conductive fiber bundle located therein.

[0067] Please refer to Figure 8 and Figure 9 , in another alternative embodiment, both the first fixing portion 111 and the second fixing portion 112 are collar rings. In this embodiment, the first fixing portion 111 and the second fixing portion 112 are two independent collar rings. In other embodiments, it is also possible to use a similar folding portion 115 as in Figure 4 to connect, so that the first fixing portion 111 and the second fixing portion 112 become an integral part, thereby facilitating the control of the distance between the first fixing portion 111 and the second fixing portion 112 during subsequent assembly, so that the entire conductive brush has a unified specification, as shown in Figure 11 .

[0068] The assembly method of the conductive fiber bundle 2 in this embodiment is as follows: as shown in Figure 9 , the conductive fiber bundle 2 penetrates into the first fixing member 11 and the second fixing member 11, and both ends of the conductive fiber bundle 2 extend out of the first fixing member 11 and the second fixing member 11 respectively; then the first fixing member 11 and the second fixing member 11 are overlapped and arranged in the thickness direction b-b of the fixing member 11, as shown in Figure 8 .

[0069] In the above embodiment, the conductive fiber bundles 2 fixed by the fixing member 11 are all one layer. In other embodiments, the conductive fiber bundles 2 can also be two layers or more. For example, in Figure 10 , the conductive fiber bundles 2 fixed by the fixing member 11 are three layers.

[0070] By setting the first fixing portion 111 and the second fixing portion 112 as collar rings, there is no need to change the existing process, which reduces the replacement cost of the manufacturing process. And in the above solution, when the first fixing member 11 and the second fixing member 11 are two independent collar rings, the existing collar ring structure can be directly used, so there is no need to replace the manufacturing equipment of the collar rings, which helps to reduce the replacement cost.

[0071] In the above embodiment, the conductive fiber bundle 2 is first fixed by the first fixing member 11 and the second fixing member 11, and then folded. In this way, the first folding portion 21 and the second folding portion 22 of the conductive fiber bundle 2 will be fixed twice, making the fixing of the conductive fiber bundle 2 more firm. Of course, in other embodiments, the conductive fiber bundle 2 can also be folded first and then installed into the fixing member 11, such as in Figure 12 andFigure 13 As shown. Specifically:

[0072] Please combine Figure 12 The fixing member 11 is a ring, the first folded portion 21 and the second folded portion 22 of the conductive fiber bundle 2 overlap along the thickness direction of the fixing member 11, the free end 23 of the conductive fiber bundle 2 after overlapping is located outside the fixing member 11, and the other end (the end is called the folded end 24) is fixed to the fixing member 11. The assembly method between the conductive fiber bundle 2 and the fixing member 11 of this embodiment is: first insert the folded end 24 of the folded conductive fiber bundle 2 into the ring 11, and then flatten the ring 11 to fix the folded end 24.

[0073] Please combine Figure 13 , this embodiment and Figure 12 The embodiments shown are substantially the same, except that the first folded portion 21 and the second folded portion 22 of the conductive fiber bundle 2 are arranged along the width direction ( Figure 13 The two devices are arranged side by side (in the direction indicated by the arrow bb in the middle).

[0074] It should be noted that Figure 12 and Figure 13 The fixing member 11 shown is a collar. Of course, in other embodiments, the fixing member 11 may also be other structures, such as a covering member. Figure 12 or Figure 13 The conductive fiber bundle 2 and Figure 7 or Figure 8 Specifically, the conductive fiber bundle 2 is folded and mounted on the first fixing portion 111 and the second fixing portion 112 of the fixing portion 11 respectively.

[0075] When the conductive fiber bundle 2 is folded and fixed in the fixing part 11, the individual conductive fibers in the conductive fiber bundle 2 will be entangled when it is folded, which increases the relative friction between the individual conductive fibers, thereby helping to prevent the individual conductive fibers from being pulled out. Moreover, in this structure, since the conductive fiber bundle is folded, it is equivalent to twisting it into a strand, which increases the hardness of the conductive fiber bundle during assembly, which helps to install it to the fixing part 11, especially when the fixing part 11 is a ring.

[0076] In the above-mentioned embodiments, the conductive fiber bundle is directly fixed by the fixing member. In other embodiments, an adhesive may be added between the fixing member and the conductive fiber bundle to improve the firmness of the fixing.

[0077] The conductive brush 10 is installed inside the fixed cover 20. The structure and fixing method of the fixed cover 20 in the above embodiment can adopt those in the prior art. Specifically, for example, the fixed cover 20 is of an annular structure, and a plurality of conductive brush grooves for installing the conductive brush 10 are formed on its inner side wall. A fastener (not shown) is installed on the fixed cover 20, and the conductive brush 10 is pressed or locked on the fixed cover 20 by using the fastener.

[0078] Please refer to Figures 1 to 3 , in this embodiment, in order to improve the convenience of assembly, a receiving groove 201 for receiving at least part of the fixing member 11 is formed inside the fixed cover 20. The fixed cover 20 is annular, and the receiving groove 201 is an annular through groove 201 extending along the circumferential direction of the fixed cover 20. The inner side surface 202 of the annular cover forms the opening of the annular through groove 201. A plurality of conductive brushes 10 are installed in the receiving groove 201.

[0079] Please refer to again Figure 3 and Figure 11 , the conductive brush 10 includes a plurality of conductive fiber bundles 2 and a plurality of fixing members 11. The conductive fiber bundles 2 and the fixing members 11 are arranged in a one-to-one manner. Adjacent two fixing members 11 are connected by a connecting portion 12. Specifically, the connecting portion 12 connects the folding portions 115 of adjacent two fixing members 11. Of course, in other embodiments, the connecting portion 12 can also connect other positions of adjacent two fixing members 11, such as connecting the first fixing member 111 or the second fixing member 112 of adjacent two fixing members 11. By arranging like this, the conductive brush 10 is integrated, and further improves the assembly efficiency between the conductive brush 10 and the fixed cover 20. And, most importantly, by connecting a plurality of fixing members 11 through the connecting portion 12, it also helps to simplify the assembly process of the conductive brush 10, reduce costs, and achieve mass production.

[0080] Please see Figure 3 , in this embodiment, during production, a plurality of fixing members 11 and the connecting portion 12 connecting the plurality of fixing members 11 are formed into a component that can be formed by stamping, and the structure formed after stamping is as Figure 4 shown. By adopting this component, it is beneficial to subsequent automated production.

[0081] The connecting portion 12 has a certain elasticity and can be bent. It is usually made of the same material as the fixing member 11, such as a metal material like copper. After connecting a number of fixing members 11, during assembly, the conducting brush 10 is bent into an annular structure, and then the conducting brush 10 is installed in the annular through groove 201. It should be noted that in design, the diameter of the conducting brush 10 can be designed to be slightly larger than the inner diameter of the annular through groove 201. In this way, when it is assembled into the annular through groove 201 of the fixing cover 20, the connecting portion 12 can be appropriately bent to utilize the elasticity after bending of the connecting portion 12, so that the conducting brush 10 has an outward expansion in the radial direction, so that it can abut against the side wall (not shown) of the annular through groove 201 in the radial direction. In this way, fewer fasteners (such as rivets, etc.) can be used.

[0082] In order to improve the applicability of the conducting brush 10, that is, to make it adaptable to fixing covers 20 of different specifications, in an alternative embodiment, the connecting portion 12 is a bendable strip structure / sheet structure. In this way, according to the inner diameter of the fixing cover 20 of different specifications, the bending depth and the number of bends of the connecting portion 12 can be adjusted to control the diameter of the conducting brush 10 to adapt to fixing covers 20 of different specifications. Moreover, by setting the connecting portion 12 as a bendable structure, the elasticity after bending can also be utilized to further increase the abutting force of the fixing member 11 against the side wall of the annular through groove 201 in the radial direction.

[0083] In addition, by adjusting the bending depth and the number of bends of the connecting portion 12, the distance between two adjacent fixing members 11 can be adjusted in the circumferential direction, so that the number of conducting brushes 10 in the fixing cover of the same specification can be adjusted according to the design requirements.

[0084] Of course, in other embodiments, the connecting portion 12 can also be a strip structure / sheet structure with a straight shape.

[0085] In other embodiments, two or more annular through grooves 201 can be provided on the fixing cover 20, as shown in Figure 14 , the accommodating groove includes a first annular through groove 2011 and a second annular through groove 2012 arranged along the thickness direction of the fixing cover 20 ( Figure 14 the direction indicated by the arrow a-a in the figure. When the fixing member is installed in the accommodating groove, the thickness direction of the fixing member is the same as the thickness direction of the fixing groove).

[0086] As described above, fasteners are provided on the fixing cover 20 in the prior art. In this embodiment, in order to reduce the use of components, there is a stamping portion (not shown) on the end surface of the fixing cover 20, and the stamping portion abuts against the fixing member 11 in the thickness direction of the fixing cover 20.

[0087] Specifically, the fixed cover 20 includes a wall body 203 forming an end face. Thin wall portions are formed at intervals on the wall body 203, and the thickness of the thin wall portions is less than the thickness of other areas of the wall body 203. The stamping portion is formed within the range of the thin wall portions.

[0088] In this embodiment, the fixed cover 20 includes a base 204 and a cover body 205 fixed on the base 204. The cover body 205 and the base 204 enclose to form a receiving groove 201. Of course, in other embodiments, the fixed cover 20 can also be integrally formed.

[0089] The motor shown in a preferred embodiment of the present application includes a housing, a stator and a rotor disposed in the housing, and a conductive ring 100 mounted on the end cover of the motor. The free ends of the conductive fiber bundles of the conductive ring 100 are in contact with the motor shaft. The structure of the conductive ring 100 can adopt any one of the above, and its assembly method on the bearing can adopt the prior art, and will not be described in detail herein.

[0090] The vehicle shown in a preferred embodiment of the present application includes a vehicle body, a traveling assembly disposed on the vehicle body, a driving assembly disposed in the vehicle body, a control assembly disposed in the vehicle body, and a vehicle seat disposed in the vehicle body, etc. The driving assembly includes a motor adopting any one of the structures in the above embodiment, and the other structures of the vehicle can adopt the prior art, and will not be described in detail herein.

[0091] Please refer to Figure 12 and Figure 13 , the preparation method of the conductive brush 10 shown in a preferred embodiment of the present application includes:

[0092] Cut the conductive fiber bundle 2;

[0093] Fold the conductive fiber bundle 2;

[0094] The fixing member 11 fixes the folded conductive fiber bundle 2.

[0095] In this embodiment, the conductive fiber bundle 2 can be folded up and down or bent and folded. For the convenience of understanding, the folded conductive fiber bundle 2 is now divided into a first folding portion 21 and a second folding portion 22. When the conductive fiber bundle 2, in addition, in the arrangement direction of the conductive fiber bundle 2, it has a thickness direction and a width direction. The conductive fiber bundle 2 can be folded along the thickness direction, so as to realize the first folding portion 21 and the second folding portion 22 being stacked in the thickness direction, see Figure 12 ; or, the conductive fiber bundle 2 can be folded along the width direction, so as to realize the first folding portion 21 and the second folding portion 22 being arranged side by side in the width direction, see Figure 13 .

[0096] It should be noted that after the conductive fiber bundle 2 is installed in the fixing member 11, the thickness direction of the conductive fiber bundle 2 is the same as that of the fixing member 11, and its width direction is the same as that of the fixing member 11.

[0097] Please refer to Figure 12 and Figure 13 , after the conductive fiber bundle 2 is folded, it has a free end 23 and a bent end 24. After the conductive ring 100 is installed on the bearing of the motor, the free end 23 contacts the output shaft of the motor.

[0098] In this embodiment, the fixing member 11 is a collar. The specific process of "the fixing member 11 fixing the folded conductive fiber bundle 2" includes:

[0099] The bent end 24 of the folded conductive fiber bundle 2 is inserted into the fixing member 11, and the free end 23 of the conductive fiber bundle 2 is not inserted into the fixing member 11.

[0100] The fixing member 11 is squeezed to clamp and fix the conductive fiber bundle 2.

[0101] In other embodiments, the structure of the fixing member 11 can also adopt the structure of the first fixing portion 111 shown in Figure 6 . When the structure of the fixing member is a covering member (specifically, a folding member), the specific process of "the fixing member fixing the folded conductive fiber bundle" includes:

[0102] The bent end of the folded conductive fiber bundle is placed on the bearing portion of the fixing member, and the free end of the conductive fiber bundle is not placed on the bearing portion.

[0103] The first folding portion and the second folding portion of the folding fixing member are folded to clamp and fix the conductive fiber bundle.

[0104] Of course, the covering member can also be a columnar-like structure that can fix the conductive fiber bundle after being bent and closed. When it is such a covering member, the difference from the above steps is the last step. Its last step becomes: bending the covering member so that its two ends are closed and clamping and fixing the conductive fiber after its closure. In addition, in other embodiments, the fixing member can also be of other structures as long as it can finally fix the conductive fiber bundle.

[0105] In this embodiment, there is one fixing member 11. In other embodiments, the fixing member can also include two parts. The structures of the two parts can be the same, such as both being collars / covering members, or different, such as one being a collar and the other being a covering member.

[0106] Please refer to Figure 3 and Figure 8 , the preparation method of the conductive brush 10 shown in another preferred embodiment of the present invention includes:

[0107] Cut the conductive fiber bundle 2;

[0108] Provide a fixing member 11, which includes a first fixing portion 111 and a second fixing portion 112;

[0109] The conductive fiber bundle 2 is fixed on the first fixing portion 111 and the second fixing portion 112, and both ends of the conductive fiber bundle 2 respectively extend beyond the first fixing portion 111 and the second fixing portion 112;

[0110] Fold the fixing member 11 with the conductive fiber bundle 2 fixed thereon, so that the conductive fiber bundles 2 are stacked in the thickness direction of the fixing member 11, and the first fixing portion 111 and the second fixing portion 112 are at least partially stacked or arranged in a staggered manner.

[0111] The structures of the first fixing portion 111 and the second fixing portion 112 may be the same or different. Specifically, please refer to Figure 3 and Figure 4 , in an alternative embodiment, the first fixing portion 111 and the second fixing portion 112 are collar rings.

[0112] Its preparation method includes:

[0113] Thread the conductive fiber bundle 2 through the first fixing portion 111 and the second fixing portion 112 in sequence. Among them, a part of the first folding portion 21 of the conductive fiber bundle 2 is located inside the first fixing portion 111, a part of the second folding portion 22 is located inside the second fixing portion 112, and both ends of the conductive fiber bundle 2 respectively extend beyond the first fixing portion 111 and the second fixing portion 112;

[0114] Extrude the first fixing portion 111 and the second fixing portion 112 to clamp the conductive fiber bundle 2;

[0115] Fold the conductive fiber bundle 2 in the thickness direction of the fixing member 11, so that the first fixing portion 111 and the second fixing portion 112 overlap. At this time, the first folding portion 21 and the second folding portion 22 overlap. Of course, in other embodiments, the first fixing portion 111 and the second fixing portion 112 may also be partially overlapped or staggered.

[0116] Please refer to Figure 8 and Figure 9 , in another alternative embodiment, the first fixing portion 111 and the second fixing portion 112 are covering members 111 and 112, specifically folding members. Each covering member 111 and 112 includes a bearing portion 113 and a bending portion 114 extending outward from the bearing portion 113 toward both sides.

[0117] Its preparation method includes:

[0118] Place the portions of the first folding part 21 and the second folding part 22 of the conductive fiber bundle 2 on the bearing parts 113 of the first fixing part 111 and the second fixing part 112. The longitudinal direction of the conductive fiber bundle 2 is the same as the longitudinal direction of the bearing part 113, and both ends of the conductive fiber bundle 2 extend beyond the two bearing parts 113 respectively.

[0119] Fold the two bending parts 114 above the conductive fiber bundle 2 to fix the conductive fiber bundle 2 on the bearing part 113.

[0120] In the thickness direction of the fixing member 11, fold the conductive fiber bundle 2 so that the first fixing part 111 and the second fixing part 112 overlap. At this time, the first folding part 21 and the second folding part 22 overlap in the thickness direction of the fixing member 11. Similarly, the first fixing part 111 and the second fixing part 112 may also at least partially overlap or be misaligned.

[0121] Similarly, the covering member may also be a columnar-like structure that can fix the conductive fiber bundle after being bent and closed. The method of bending and fixing the conductive fiber bundle is the same as the foregoing, and will not be described in detail herein. In other embodiments, the fixing member may also be other structures, as long as the conductive fiber bundle can be fixed finally.

[0122] As described above, by using the covering member to fix the conductive fiber bundle, the positioning accuracy problem in the prior art can be effectively solved, so that the conductive brush can realize automatic production without increasing the production cost, and the production efficiency is improved.

[0123] In another alternative embodiment, the first fixing member is a collar, and the second fixing part is a covering member. Its preparation method includes:

[0124] Push the conductive fiber bundle through the collar and continue to push forward until the first folding part of the conductive fiber bundle is on the bearing part and the second folding part is inside the collar.

[0125] Squeeze the collar to fix the second folding part; fold the bending part of the covering member to fix the second folding part.

[0126] Fold the conductive fiber bundle so that the collar and the covering member overlap. At this time, the first folding part and the second folding part overlap in the thickness direction of the fixing member. Similarly, the collar and the covering member may also partially overlap or be misaligned.

[0127] As described above, please refer to Figure 6 、 Figure 7 and Figure 11 , the fixing member 11 may further include a folding part 115 for connecting the first fixing member 11 and the second fixing member 11, and adjacent fixing members 11 are connected by a connecting part 12.

[0128] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0129] The above embodiments only express several implementation manners of the present invention, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A conductive brush, characterized in that: It comprises a conductive fiber bundle and a fixing member for fixing the conductive fiber bundle, wherein the conductive fiber bundle is folded and placed in the fixing member; The conductive fiber bundle includes a first folded portion and a second folded portion formed by folding, the fixing member includes a first fixing portion for fixing the first folded portion and a second fixing portion for fixing the second folded portion, and the first fixing portion and the second fixing portion are stacked in a thickness direction of the fixing member; At least one of the first fixing part and the second fixing part is a covering member, and the covering member has an unfolded state and a folded state; the conductive fiber bundle is placed on the covering member in the unfolded state, and the conductive fiber bundle is fixed by the covering member in the folded state.

2. The conductive brush according to claim 1, characterized in that The covering member comprises a bearing portion for placing the conductive fiber bundle and a bending portion extending outwardly from the bearing portion toward two sides.

3. The conductive brush according to claim 2, characterized in that: The bending parts on both sides of the bearing part are staggered.

4. The conductive brush according to claim 1, characterized in that: The fixing member further includes a folding portion connecting the first fixing portion and the second fixing portion.

5. A conductive ring, characterized in that: The invention comprises a fixing cover and a conductive brush as claimed in any one of claims 1 to 4 installed in the fixing cover.

6. A motor, characterized in that: The electric machine comprises a conductive ring as claimed in claim 5 mounted on a bearing of the electric machine.

7. A car, characterized in that: Comprising the motor as claimed in claim 6.

8. A method for preparing a conductive brush, characterized in that: include: cutting the conductive fiber bundle; Providing a fixing member, the fixing member comprising a first fixing portion and a second fixing portion; The conductive fiber bundle is fixed on the first fixing portion and the second fixing portion, wherein two ends of the conductive fiber bundle extend beyond the first fixing portion and the second fixing portion respectively; Folding the fixing member to which the conductive fiber bundle is fixed, so that the conductive fiber bundle is stacked in the thickness direction of the fixing member, and the first fixing portion and the second fixing portion are at least partially stacked or staggered; The first fixing part and the second fixing part are rings, and the preparation method includes: Inserting the conductive fiber bundle into the first fixing portion and the second fixing portion in sequence, wherein two ends of the conductive fiber bundle extend beyond the first fixing portion and the second fixing portion respectively; squeezing the first fixing portion and the second fixing portion to clamp the conductive fiber bundle; The conductive fiber bundle is folded in the thickness direction of the fixing member so that the first fixing portion and the second fixing portion are at least partially overlapped or staggered.

9. A method for preparing a conductive brush, characterized in that: include: cutting the conductive fiber bundle; Providing a fixing member, the fixing member comprising a first fixing portion and a second fixing portion; The conductive fiber bundle is fixed on the first fixing portion and the second fixing portion, wherein two ends of the conductive fiber bundle extend beyond the first fixing portion and the second fixing portion respectively; Folding the fixing member to which the conductive fiber bundle is fixed, so that the conductive fiber bundle is stacked in the thickness direction of the fixing member, and the first fixing portion and the second fixing portion are at least partially stacked or staggered; The first fixing portion and the second fixing portion are covering parts, and each of the covering parts comprises a bearing part and a bending part extending outward from the bearing part toward both sides; The preparation method comprises: Placing the conductive fiber bundle on the bearing part of the first fixing part and the bearing part of the second fixing part, wherein the longitudinal direction of the conductive fiber bundle is the same as the longitudinal direction of the bearing part, and two ends of the conductive fiber bundle respectively extend beyond the two bearing parts; Folding the two bent portions over the conductive fiber bundle to fix the conductive fiber bundle on the supporting portion; The conductive fiber bundle is folded in the thickness direction of the fixing member so that the first fixing portion and the second fixing portion are at least partially overlapped or staggered.

Images