Plug-in brush holder and brush box and installation method thereof

Abstract

The present invention discloses a plug-in brush holder and a method for installing the same, relating to the field of motor brush holders and boxes. The brush holder comprises a brush box, a brush holder, and a brush rack. The inner wall of the brush box is fixedly connected to a plurality of groups of connecting feet, each of which is provided with a connecting groove. Two opposing groups of connecting grooves are evenly arranged on opposite surfaces of the inner wall and are provided with temperature-increasing deformation chambers. A hollow fixed column is fixedly connected to the top of the inner wall of the brush holder cavity. A top column is slidably connected to the lower end of the fixed column. The bottom end of the top column is connected to the top of a carbon brush holder movably provided in the brush holder cavity. An adjustment spring is provided at the top of the top column within the fixed column. The top end of the adjustment spring contacts the bottom foot of a screw, which is threadedly connected to the top of the brush holder and extends out of the brush holder. The present invention greatly improves the efficiency of replacing carbon brushes, ensures that the brush box and the brush holder can be in stable contact when the motor is operating, and achieves the purpose of conveniently increasing or decreasing the pressure between the carbon brush and the collector ring.

Description

Technical Field

[0001] The invention relates to the field of motor brush holders and brush boxes, in particular to a plug-in brush holder and brush box and an installation method thereof. Background Art

[0002] During the operation of the generator, the excitation device rectifies the AC power obtained from the generator outlet into DC power with the required parameters. The DC power is sent to the generator rotor winding through the sliding contact between the carbon brushes and the slip rings to establish the internal magnetic field of the generator. The carbon brushes are installed in the brush holder, so the entire operating condition of the brush holder affects the operating effect of the carbon brushes.

[0003] The existing motor brush holder and brush box are mostly fixed to the brush rack by bolts. Gaps are easily generated at the connection between the brush holder and the brush box, which causes the brush holder to vibrate in the brush box when the motor is working, resulting in uneven wear of the carbon rod and loud noise. Since the brush holder is fixed in the brush box, it is troublesome to remove the brush holder when the carbon brushes in the brush holder need to be replaced. After replacing the carbon brushes, the brush holder needs to be fastened to the brush box by bolts, which is time-consuming and labor-intensive. Replacing the carbon brushes is more troublesome. At the same time, the pressure between the carbon brushes and the slip rings cannot be conveniently controlled according to the amount of wear of the carbon brushes, and it is easy for the pressure to be too small or too fast, resulting in the carbon brushes wearing too quickly or having poor contact. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide a plug-in brush holder and brush box and its installation method to solve the technical problems that gaps are easily generated at the connection between the brush holder and the brush box of the existing motor brush holder and brush box, it is troublesome to replace the carbon brush, and it is not possible to conveniently control the pressure between the carbon brush and the collector ring.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a plug-in brush holder and a brush box, comprising a brush box, a brush holder and a brush holder, wherein the inner wall of the brush box is fixedly connected to multiple groups of connecting feet, and a connecting groove is provided in the connecting feet, and the connecting groove vertically passes to the bottom end of the brush box, and the projection of the connecting groove is a convex shape. The edge of the brush holder is provided with a convex strip that matches the multiple groups of connecting grooves, and the two opposite groups of connecting grooves are evenly arranged on the opposite surfaces of the inner wall and are provided with a temperature-increasing deformation bin, and a temperature-increasing deformation metal strip that expands due to temperature increase is provided in the temperature-increasing deformation bin, and the connecting groove is fixedly connected to a limiting outer ring at the top end of the brush holder, and the limiting outer ring is movably connected to a limiting head toward the multiple groups of connecting grooves, and the limiting head is connected to the top end of the brush holder at the bottom end of the limiting outer ring. When touched, the inner wall of the connecting foot is inserted, and the limiting inner ring is slidably connected to the limiting inner ring. The limiting inner ring cannot be deformed, and a cavity is provided inside the brush holder, and a carbon brush extending downward from the brush box is slidably connected. The top of the inner wall of the brush holder cavity is fixedly connected with a hollow fixing column, and the lower end of the fixing column is slidably connected with a top column, and the bottom end of the top column is connected to the top of the carbon brush holder movably arranged in the brush holder cavity. An adjusting spring is provided in the fixing column at the top of the top column, and the top of the adjusting spring contacts the bottom foot of the screw, and the screw is threadedly connected to the top of the brush holder and the upper part extends out of the brush holder. A conductive spring is provided in the brush holder cavity, and the bottom end of the conductive spring contacts the carbon brush holder, and the top end contacts the top of the brush holder cavity.

[0006] By adopting the above technical solution, the efficiency of replacing carbon brushes is greatly improved, ensuring that the brush box and the brush holder can be in stable contact when the motor is working, thereby achieving the purpose of conveniently increasing or reducing the pressure between the carbon brush and the slip ring.

[0007] The present invention is further configured such that the top end of the carbon brush is fixedly connected to the bottom end of the carbon brush holder.

[0008] By adopting the above technical solution, the conductive spring is prevented from directly contacting the carbon brush, which causes uneven force on the bottom end of the carbon brush.

[0009] The present invention is further configured such that a power connection ear is provided at the top end of the brush holder.

[0010] By adopting the above technical solution, the circuit is connected through the power connection ear.

[0011] The present invention is further configured such that the outer wall of the brush box is fixedly connected to a plurality of groups of mounting feet, and the mounting feet are provided with mounting holes.

[0012] By adopting the above technical solution, the brush box is fixed on the brush holder by connecting bolts and fitting the mounting holes on the mounting feet.

[0013] The present invention is further configured such that a plurality of groups of inner limiting ring ears are fixedly connected to the inner side of the inner limiting ring.

[0014] By adopting the above technical solution, the limiting inner ring can be conveniently removed through the limiting inner ring ear.

[0015] The present invention is further configured such that the carbon brush holder is a conical structure, and a limit platform having the same taper as that of the carbon brush holder is provided at the bottom end of the brush holder cavity.

[0016] By adopting the above technical solution, the carbon brush inside the brush holder is prevented from sliding out of the brush holder.

[0017] The present invention is further configured such that the gap between the inner wall of the brush box and the outer wall of the brush holder is filled with thermally conductive silicone grease.

[0018] By adopting the above technical solution, the heat generated by the working motor is conducted, so that the multiple groups of heated and deformed metal strips can be better deformed and squeezed to form the convex strips on the outer wall of the brush holder.

[0019] The present invention is further configured such that the top end of the screw is connected to a knob.

[0020] By adopting the above technical solution, the extension and retraction of the screw can be conveniently controlled by turning the knob.

[0021] The present invention also proposes a method for installing a plug-in brush holder and a brush box, comprising the following steps:

[0022] Step 1: Use the fixing bolts and mounting feet to secure the brush box to the brush holder.

[0023] Step 2: Fit the protrusion on the edge of the brush holder into the connecting groove on the inner wall of the brush box and slide the brush holder into the brush box;

[0024] Step 3: Align the limit head on the edge of the limit outer ring with the connection groove, press the limit outer ring toward the brush handle, and connect the limit inner ring to the limit outer ring;

[0025] Step 4: Turn the adjustment knob to adjust the length of the screw into the brush holder;

[0026] Step 5: Connect the wires to the power connector.

[0027] The present invention is further configured such that the cooperation mode between the limiting inner ring and the limiting outer ring in step three is an interference fit.

[0028] By adopting the above technical solution, the stability of the cooperation between the limiting outer ring and the limiting inner ring is guaranteed.

[0029] In summary, the present invention mainly has the following beneficial effects:

[0030] 1. The present invention fixes the brush box to the brush holder, provides a brush holder that is slidably inserted into the brush box, and arranges carbon brushes in the brush holder. When the carbon brushes need to be replaced, only the brush holder needs to be pulled out, which greatly facilitates the replacement of the carbon brushes in the brush holder and greatly improves the efficiency of replacing carbon brushes.

[0031] 2. The present invention arranges multiple sets of temperature-increasing deformable metal strips between the brush box and the brush holder. When the motor is operating, the temperature rises. After the heat is transferred to the deformable metal strips through the heat-conducting medium, the deformable metal strips deform and squeeze the connecting surface between the brush box and the brush holder. This ensures that the brush box and the brush holder can maintain stable contact when the motor is operating, avoiding vibration that affects the service life of the carbon brushes or generates noise.

[0032] 3. The present invention sets a fixed column in the brush holder toward the carbon brush seat, sets a top column in the fixed column, sets an adjusting spring at the top of the sliding column, sets a top plate at the top of the adjusting spring and connects the adjusting knob on the outside of the brush holder through a screw. By turning the adjusting knob, the elongation of the adjusting spring can be conveniently controlled, thereby controlling the pressure of the top column on the carbon brush seat, thereby achieving the purpose of conveniently increasing or decreasing the pressure between the carbon brush and the slip ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a front view of the interior of the present invention;

[0034] Figure 2 For the present invention Figure 1 A magnified view of middle A;

[0035] Figure 3 This is a front view of the interior of the brush box of the present invention;

[0036] Figure 4 For the present invention Figure 3 Enlarged view of middle B;

[0037] Figure 5 This is a top view of the interior of the brush box of the present invention;

[0038] Figure 6 For the present invention Figure 5 Enlarged view of middle C;

[0039] Figure 7 A top view of the present invention;

[0040] Figure 8 For the present invention Figure 7 Enlarged view of middle D;

[0041] Figure 9 This is a front view of the interior of the fixing post of the present invention;

[0042] Figure 10 It is a front view of the present invention;

[0043] Figure 11 This is a side view and an interior view of the heating deformation chamber of the present invention.

[0044] In the figure: 1. Brush box; 2. Brush holder; 3. Connecting foot; 4. Connecting slot; 5. Knob; 6. Screw; 7. Fixing column; 8. Adjusting spring; 9. Top column; 10. Conductive spring; 11. Carbon brush holder; 12. Carbon brush; 13. Electrical connection ear; 14. Limit outer ring; 15. Limit head; 16. Limit inner ring; 17. Limit inner ring ear; 18. Temperature-increasing deformation chamber; 19. Temperature-increasing deformation metal strip; 20. Thermal grease; 21. Mounting foot. DETAILED DESCRIPTION

[0045] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0046] The following describes an embodiment of the present invention based on its overall structure.

[0047] A plug-in brush holder and brush box, such as Figure 1-11 As shown, it includes a brush box 1, a brush holder 2 and a brush holder. The inner wall of the brush box 1 is fixedly connected to multiple groups of connecting feet 3. The connecting feet 3 are provided with connecting grooves 4. The connecting grooves 4 vertically pass to the bottom end of the brush box 1. The projection of the connecting grooves 4 is a convex shape. The edge of the brush holder 2 is provided with convex strips that cooperate with the multiple groups of connecting grooves 4. The brush holder 2 and the brush box are connected through the connecting grooves 4 cooperating with the bosses on the outer wall edges of the brush holder 2. The two opposite groups of connecting grooves 4 are evenly arranged on the opposite surfaces of the inner wall and are provided with temperature-increasing deformation bins 18. The temperature-increasing deformation bins 18 are provided with temperature-increasing deformation metal strips 19 that expand upon temperature. After the motor is working, the temperature-increasing deformation metal strips 19 are deformed and squeezed against the bosses on the outer wall of the brush holder 2 to ensure that the brush holder 2 is in firm contact with the brush box 1. The connecting grooves 4 are fixedly connected to the limiting outer ring 14 at the top of the brush holder 2. The limiting outer ring 14 is movably connected to the limiting head 15 toward the multiple groups of connecting grooves 4. The limiting head 15 is at the bottom of the limiting outer ring 14 and is connected to the limiting head 15. When the top of the brush holder 2 contacts, it is inserted into the inner wall of the connecting foot 3, and the limiting outer ring 14 is inserted into the inner wall of the connecting foot 3 through the limiting head 15 to limit the brush holder 2. The limiting inner ring 16 is slidably connected inside the limiting outer ring 14, and the limiting inner ring 16 cannot be deformed. A cavity is provided inside the brush holder 2, and a carbon brush 12 extending downward from the brush box 1 is slidably connected. The top of the inner wall of the brush holder 2 cavity is fixedly connected with a hollow fixed column 7, and the lower end of the fixed column 7 is slidably connected with a top column 9. The bottom end of the top column 9 is connected to the top of the carbon brush holder 11 movably arranged in the cavity of the brush holder 2. An adjusting spring 8 is provided at the top of the top column 9 in the fixed column 7. The top of the adjusting spring 8 contacts the bottom foot of the screw 6. The screw 6 is threadedly connected to the top of the brush holder 2 and the upper part extends out of the brush holder 2. A conductive spring 10 is provided in the cavity of the brush holder 2. The bottom end of the conductive spring 10 contacts the carbon brush holder 11, and the top contacts the top of the cavity of the brush holder 2.

[0048] See also Figure 1 The top of the carbon brush 12 is fixedly connected to the bottom end of the carbon brush holder 11 to prevent the conductive spring 10 from directly contacting the carbon brush 12 and causing uneven force on the bottom end of the carbon brush 12. The outer wall of the brush box 1 is fixedly connected to multiple sets of mounting feet 21. The mounting feet 21 are provided with mounting holes. The brush box 1 is fixed to the brush holder by connecting bolts and the mounting holes on the mounting feet 21. The carbon brush holder 11 is a conical structure. The bottom end of the cavity of the brush holder 2 is provided with a limit platform with the same taper as the carbon brush holder 11 to prevent the carbon brush 12 inside the brush holder 2 from slipping out of the brush holder 2. The top of the screw 6 is connected to the knob 5. By turning the knob 5, the extension and retraction of the screw 6 can be conveniently controlled.

[0049] See also Figure 2 The top of the brush holder 2 is provided with an electrical connection ear 13, through which the circuit is connected. The inner side of the limiting inner ring 16 is fixedly connected with multiple groups of limiting inner ring ears 17, through which the limiting inner ring 16 can be easily removed.

[0050] See also Figure 5 The gap between the inner wall of the brush box 1 and the outer wall of the brush holder 2 is filled with thermal grease 20 to conduct the heat generated by the motor so that the multiple groups of heated deformed metal strips 19 can better deform and squeeze the convex strips on the outer wall of the brush holder 2.

[0051] A plug-in brush holder and brush box installation method, such as Figure 1-11 As shown, the following steps are included:

[0052] Step 1: Fix the brush box 1 to the brush holder by using the fixing bolts and the mounting feet 21;

[0053] Step 2: Fit the protrusion on the edge of the brush holder 2 with the connecting groove 4 on the connecting foot 3 on the inner wall of the brush box 1 to slide the brush holder 2 into the brush box 1. The protrusion on the edge of the brush holder 2 fits with the connecting groove 4 of the brush box 1 to connect the brush holder 2 to the brush box 1.

[0054] Step 3: Align the limiting head 15 on the edge of the limiting outer ring 14 with the connecting groove 4, press the limiting outer ring 14 toward the brush handle 2, and at the same time connect the limiting inner ring 16 to the limiting outer ring 14. The non-deformable limiting inner ring 16 is stuck in the limiting outer ring 14 to prevent the limiting outer ring 14 from deforming and causing the head of the limiting head 15 to break away from the slot on the connecting foot 3. In step 3, the matching mode of the limiting inner ring 16 and the limiting outer ring 14 is an interference fit, which ensures the stability of the matching between the limiting outer ring 14 and the limiting inner ring 16;

[0055] Step 4: Turn the adjusting knob 5 to adjust the length of the screw 6 entering the brush holder 2 to ensure that the appropriate contact pressure is maintained between the carbon brush 12 and the slip ring;

[0056] Step 5: Connect the wires to the electrical connector 13.

[0057] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiment without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A plug-in brush holder and brush box, comprising a brush box (1), a brush holder (2) and a brush holder, characterized in that: The inner wall of the brush box (1) is fixedly connected to a plurality of connecting feet (3), and a connecting groove (4) is provided in the connecting feet (3). The connecting groove (4) extends vertically to the bottom end of the brush box (1), and the projection of the connecting groove (4) is a convex shape. The edge of the brush holder (2) is provided with convex strips that match the plurality of connecting grooves (4). Two opposite groups of the connecting grooves (4) are evenly arranged on opposite surfaces of the inner wall and are provided with heating deformation chambers (18). The heating deformation chambers (18) are provided with heating deformation chambers (18). The temperature-expanding, temperature-deformable metal strip (19) is fixedly connected to a limiting outer ring (14) at the top of the brush holder (2) in the connection groove (4). The limiting outer ring (14) is movably connected to a limiting head (15) toward the plurality of connection grooves (4). The limiting head (15) is inserted into the inner wall of the connecting foot (3) when the bottom end of the limiting outer ring (14) contacts the top of the brush holder (2). The limiting inner ring (16) is slidably connected to the limiting outer ring (14). The limiting inner ring (16) is non-deformable. The brush holder (2) is provided with a cavity inside and is slidably connected to a carbon brush (12) extending downward from the brush box (1); the top end of the inner wall of the cavity of the brush holder (2) is fixedly connected to a hollow fixed column (7); the lower end of the fixed column (7) is slidably connected to a top column (9); the bottom end of the top column (9) is connected to the top end of a carbon brush seat (11) movably provided in the cavity of the brush holder (2); the top end of the top column (9) is provided with an adjustment spring (8) in the fixed column (7); the adjustment spring The top end of the brush holder (8) contacts the bottom foot of the screw (6), the screw (6) is threadedly connected to the top end of the brush holder (2) and the upper part extends out of the brush holder (2), a conductive spring (10) is provided in the cavity of the brush holder (2), the bottom end of the conductive spring (10) contacts the carbon brush holder (11), and the top end contacts the top end of the cavity of the brush holder (2), the top end of the brush holder (2) is provided with an electrical connection ear (13), and a plurality of groups of limiting inner ring ears (17) are fixedly connected to the inner side of the limiting inner ring (16).

2. The plug-in brush holder and brush box according to claim 1, characterized in that: The top end of the carbon brush (12) is fixedly connected to the bottom end of the carbon brush holder (11).

3. The plug-in brush holder and brush box according to claim 1, characterized in that: Multiple groups of mounting feet (21) are fixedly connected to the outer wall of the brush box (1), and mounting holes are provided on the mounting feet (21).

4. The plug-in brush holder and brush box according to claim 1, characterized in that: The carbon brush holder (11) is a conical structure, and a limit platform having the same taper as that of the carbon brush holder (11) is provided at the bottom end of the cavity of the brush holder (2).

5. The plug-in brush holder and brush box according to claim 1, characterized in that: The gap between the inner wall of the brush box (1) and the outer wall of the brush holder (2) is filled with thermal conductive silicone grease (20).

6. The plug-in brush holder and brush box according to claim 1, characterized in that: The top end of the screw rod (6) is connected to a knob (5).

7. A method for installing a plug-in brush holder and brush box, characterized in that: The plug-in brush holder and brush box according to any one of claims 1 to 6 comprises the following steps: Step 1: Fix the brush box (1) to the brush holder by using fixing bolts and mounting feet (21); Step 2: Slide the brush holder (2) into the brush box (1) by aligning the protrusion on the edge of the brush holder (2) with the connecting groove (4) on the connecting foot (3) on the inner wall of the brush box (1); Step 3: Align the limiting head (15) on the edge of the limiting outer ring (14) with the connecting groove (4), press the limiting outer ring (14) toward the brush holder (2), and simultaneously connect the limiting inner ring (16) to the limiting outer ring (14); Step 4: Turn the adjustment knob (5) to adjust the length of the screw (6) entering the brush holder (2); Step 5: Connect the wire to the power ear (13).

8. The method for installing a plug-in brush holder and brush box according to claim 7, characterized in that: In step three, the inner limiting ring (16) and the outer limiting ring (14) are fitted in an interference fit.

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