A built-in structure of motor grounding terminal

Abstract

The present invention relates to the field of motor technology, and more particularly to a built-in structure for a motor grounding terminal, comprising a housing and a brush holder connected to the housing, wherein a first terminal and a second terminal are respectively provided on either side of the brush holder, a grounding terminal is provided on the side of the brush holder proximate to the first terminal, one end of the grounding terminal abuts the first terminal, and the other end of the grounding terminal abuts the housing, and an end cap is provided on the end of the housing proximate to the brush holder. The present invention utilizes a built-in grounding terminal, eliminating the need for conventional welding operations. The grounding terminal maintains stable and reliable contact with the housing and the terminal, is less likely to loosen or fall off, is easy to operate, and has a simple and aesthetically pleasing appearance.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a built-in structure of a motor grounding terminal. Background Art

[0002] Motors, especially those with brushes, generate a lot of noise when running at high speeds. To meet the requirements of electromagnetic compatibility standards, this noise must be reduced. Noise reduction generally requires the installation of a grounding terminal to form a low-resistance path for high-frequency interference signals, thereby suppressing high-frequency interference and reducing the noise generated by the motor. Existing grounding terminals are fixed to the housing by welding, which is cumbersome and complicated to operate, with high production costs. In addition, the grounding terminal is prone to falling off, resulting in performance failure. Summary of the Invention

[0003] The purpose of the present invention is to address the deficiencies of the existing technology and provide a built-in structure for a motor grounding terminal. The use of a built-in grounding terminal can eliminate the traditional welding operation. The grounding terminal is in stable and reliable contact with the casing and the terminal, is not prone to loosening or falling off, is easy to operate, and has a simple and beautiful appearance.

[0004] To achieve the above-mentioned purpose, the present invention provides a built-in structure of a motor grounding terminal, including a casing and a brush holder connected to the casing, wherein a first terminal and a second terminal are respectively provided on both sides of the brush holder, and a grounding terminal is provided on the side of the brush holder close to the first terminal, one end of the grounding terminal abuts against the first terminal, and the other end of the grounding terminal abuts against the casing, and an end cover is provided on the end of the casing close to the brush holder.

[0005] Preferably, the grounding terminal includes an integrally formed fixing plate, a first elastic arm and a second elastic arm, the end of the first elastic arm is bent to form an abutment portion, the abutment portion includes a first convex abutment surface, a first inward abutment surface, a second convex abutment surface and a second inward abutment surface connected in sequence into a wave shape, the first convex abutment surface and the second convex abutment surface are both abutted against the casing, the first inward abutment surface and the second inward abutment surface are both abutted against the brush holder, and the outer side wall of the second elastic arm is provided with a protrusion.

[0006] Preferably, the inner side wall of the first terminal is provided with a groove, and the protrusion is accommodated in the groove.

[0007] Preferably, the first terminal and the second terminal are connected to the first brush arm and the second brush arm respectively, and the first terminal and the second terminal are arranged perpendicular to the first brush arm and the second brush arm respectively. The ends of the first terminal and the second terminal are respectively provided with a first connecting column and a second connecting column, and the end of the first brush arm is provided with a first connecting hole connected to the first connecting column, and the end of the second brush arm is provided with a second connecting hole connected to the second connecting column.

[0008] Preferably, a first insertion cavity and a second insertion cavity are respectively provided on both sides of the brush holder, the first terminal and the first brush arm are both inserted into the first insertion cavity, two first abutting columns are arranged at intervals on one side of the first insertion cavity, and two second abutting columns are arranged at intervals on the other side of the first insertion cavity, an insertion groove for inserting the second elastic arm is provided between the two first abutting columns, the two second abutting columns are both abutted against the first brush arm, an accommodating groove for accommodating the first elastic arm is provided on the outer side of the brush holder, and the second terminal and the second brush arm are both inserted into the second insertion cavity.

[0009] Preferably, the end cover includes an integrally formed shell bottom end, shell middle end, shell top end and shell inner cavity, the shell bottom end is provided with a plurality of positioning holes, the shell middle end is connected between the shell bottom end and the shell top end, the shell top end protrudes outward from the shell middle end, and the shell inner cavity is arranged inside the end cover and is used to place bearings and rotating shafts.

[0010] Preferably, the end surface of the brush holder is provided with a plurality of positioning columns matching the positioning holes, and the first terminal and the second terminal pass through the positioning holes and protrude out of the end cover.

[0011] Preferably, an embedding edge for embedding the end cover is provided circumferentially on the inner wall of the casing.

[0012] Beneficial effects of the present invention: A built-in structure of a motor grounding terminal includes a casing and a brush holder connected to the casing, a first terminal and a second terminal are respectively provided on both sides of the brush holder, a grounding terminal is provided on the side of the brush holder close to the first terminal, one end of the grounding terminal abuts against the first terminal, and the other end of the grounding terminal abuts against the casing, and an end cover is provided on the end of the casing close to the brush holder.

[0013] The brush holder is mounted in a matching manner within the housing, and the end cap is assembled to the bottom of the housing and covers the brush holder. The first terminal and the second terminal are respectively mounted on either side of the brush holder. The ground terminal is stably mounted on the brush holder, and both ends of the ground terminal respectively contact and fit with the first terminal and the housing to ensure good contact and prevent loosening and falling off. The ground terminal is installed inside the motor, taking up little space and having an attractive appearance. It can effectively protect the motor from external electromagnetic interference. Since the ground terminal forms a low-resistance path for high-frequency interference signals, it can suppress high-frequency interference, ensure the safe operation of the motor, reduce motor noise, thereby increasing the service life of the motor and meeting the requirements of electromagnetic compatibility standards. The present invention adopts a built-in ground terminal method, which can eliminate traditional welding operations. The ground terminal has stable and reliable contact with the housing and the terminal, is not prone to loosening and falling off, is easy to operate, and has a simple and attractive appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention.

[0015] Figure 2 It is a schematic diagram of the cross-sectional structure inside the present invention.

[0016] Figure 3 It is a schematic diagram of the decomposition structure of the present invention.

[0017] Figure 4 This is a schematic diagram of the decomposition structure from another angle of the present invention.

[0018] Figure 5 Schematic diagram of the structure of the grounding terminal of the present invention.

[0019] Reference numerals include:

[0020] 1——housing 11——embedded edge

[0021] 2——Brush holder 21——First insertion cavity 22——Second insertion cavity

[0022] 23——first abutment column 24——second abutment column 25——insertion slot

[0023] 26——Accommodation groove 27——Positioning column

[0024] 3——First terminal 31——Groove 32——First connecting column

[0025] 4——Second terminal 41——Second connecting column

[0026] 5 - ground terminal 51 - fixed plate 52 - first elastic arm

[0027] 53 - second elastic arm 54 - contact portion 55 - first convex contact surface

[0028] 56 - first inward convex contact surface 57 - second outward convex contact surface 58 - second inward convex contact surface

[0029] 59——Bump

[0030] 6——end cover 61——bottom end of shell 62——middle end of shell

[0031] 63 - Shell top 64 - Shell cavity 65 - Positioning hole

[0032] 7——First brush arm 71——First connection hole

[0033] 8——Second brush arm 81——Second connecting hole. DETAILED DESCRIPTION

[0034] The present invention is described in detail below with reference to the accompanying drawings.

[0035] like Figures 1 to 5 As shown, a built-in structure of a motor grounding terminal of the present invention includes a housing 1 and a brush holder 2 connected to the housing 1, a first terminal 3 and a second terminal 4 are respectively provided on both sides of the brush holder 2, a grounding terminal 5 is provided on the side of the brush holder 2 close to the first terminal 3, one end of the grounding terminal 5 abuts against the first terminal 3, and the other end of the grounding terminal 5 abuts against the housing 1, and an end cover 6 is provided on the end of the housing 1 close to the brush holder 2.

[0036] The brush holder 2 is mounted in a matching manner within the housing 1. The end cap 6 is assembled at the bottom of the housing 1 and covers the brush holder 2. The first terminal 3 and the second terminal 4 are respectively mounted on either side of the brush holder 2. The ground terminal 5 is stably mounted on the brush holder 2. The two ends of the ground terminal 5 are respectively in contact with the first terminal 3 and the housing 1, ensuring good contact to prevent loosening and falling off. The ground terminal 5 is installed inside the motor, taking up little space and having an attractive appearance. It can effectively protect the motor from external electromagnetic interference. Since the ground terminal 5 forms a low-resistance path for high-frequency interference signals, it can suppress high-frequency interference, ensure the safe operation of the motor, reduce motor noise, thereby increasing the service life of the motor and meeting the requirements of electromagnetic compatibility standards. The present invention adopts a built-in ground terminal 5, which can eliminate the traditional welding operation. The ground terminal 5 is in stable and reliable contact with the housing 1 and the terminal, is not prone to loosening and falling off, is easy to operate, and has a simple and attractive appearance.

[0037] like Figure 1 、 Figure 2 and Figure 5 As shown, the grounding terminal 5 of this embodiment includes an integrally formed fixing plate 51, a first elastic arm 52 and a second elastic arm 53. The end of the first elastic arm 52 is bent to form an abutment portion 54. The abutment portion 54 includes a first convex abutment surface 55, a first inward abutment surface 56, a second convex abutment surface 57 and a second inward abutment surface 58 connected in sequence into a wave shape. The first convex abutment surface 55 and the second convex abutment surface 57 are both in abutment with the housing 1, and the first inward abutment surface 56 and the second inward abutment surface 58 are both in abutment with the brush holder 2. The outer side wall of the second elastic arm 53 is provided with a protrusion 59. Specifically, the integrally formed fixing plate 51, the first elastic arm 52 and the second elastic arm 53 have a compact and stable structure and are simple and convenient to manufacture. The first convex contact surface 55 and the second convex contact surface 57 are both in contact with the housing 1, and the first inward convex contact surface 56 and the second inward convex contact surface 58 are both in contact with the brush holder 2, which effectively prevents accidental failure of one contact point and ensures contact stability, making it less likely for the grounding terminal 5 to loosen and fall off.

[0038] like Figure 2 、 Figure 3 and Figure 4As shown, the inner side wall of the first terminal 3 of this embodiment is recessed with a groove 31, and the protrusion 59 is accommodated in the groove 31. Specifically, the outer side wall of the second elastic arm 53 is recessed with a protrusion 59, and the inner side wall of the first terminal 3 is recessed with a groove 31. There are two protrusions 59 and two grooves 31, respectively, and the protrusions 59 are correspondingly inserted into the groove 31, which has a simple structure, good positioning effect, and convenient assembly and disassembly.

[0039] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, in this embodiment, the first terminal 3 and the second terminal 4 are connected to the first brush arm 7 and the second brush arm 8, respectively. The first terminal 3 and the second terminal 4 are arranged perpendicular to the first brush arm 7 and the second brush arm 8, respectively. The ends of the first terminal 3 and the second terminal 4 are provided with a first connecting post 32 and a second connecting post 41, respectively. The end of the first brush arm 7 is provided with a first connecting hole 71 connected to the first connecting post 32, and the end of the second brush arm 8 is provided with a second connecting hole 81 connected to the second connecting post 41. Specifically, the first terminal 3 is connected to the first connecting hole 71 via the first connecting post 32, and the second terminal 4 is connected to the second connecting hole 81 via the second connecting post 41. This achieves the perpendicular arrangement of the first terminal 3 and the second terminal 4 with the first brush arm 7 and the second brush arm 8, respectively. This facilitates assembly and ensures a secure and stable assembly, ensuring excellent performance.

[0040] like Figure 1 、 Figure 3 and Figure 4As shown, the brush holder 2 of this embodiment has a first insertion cavity 21 and a second insertion cavity 22 on both sides respectively, the first terminal 3 and the first brush arm 7 are both inserted into the first insertion cavity 21, two first abutting columns 23 are arranged at intervals on one side of the first insertion cavity 21, and two second abutting columns 24 are arranged at intervals on the other side of the first insertion cavity 21, an insertion groove 25 for inserting the second elastic arm 53 is provided between the two first abutting columns 23, the two second abutting columns 24 are both in abutment with the first brush arm 7, and an accommodating groove 26 for accommodating the first elastic arm 52 is provided on the outer side of the brush holder 2, and the second terminal 4 and the second brush arm 8 are both inserted into the second insertion cavity 22. Specifically, the first terminal 3 and the first brush arm 7 are both inserted into the first insertion cavity 21, and two first abutting columns 23 are arranged at intervals on one side of the first insertion cavity 21, and an insertion groove 25 is opened between the two first abutting columns 23, so that the second elastic arm 53 of the grounding terminal 5 is stably inserted into the insertion groove 25, so that the second elastic arm 53 is in abutment with the first terminal 3, and the contact is stable and good. The first elastic arm 52 of the grounding terminal 5 is stably accommodated in the accommodating groove 26, so that the first elastic arm 52 is in abutment with the housing 1, and the contact area is large and stable. Two second abutting columns 24 are arranged at intervals on the other side of the first insertion cavity 21, and the two second abutting columns 24 are in abutment with the first brush arm 7, so as to better fix the assembly position of the first brush arm 7 in the brush holder 2. The second terminal 4 and the second brush arm 8 are both stably inserted into the second insertion cavity 22, so that the first brush arm 7 and the second brush arm 8 are fixedly assembled on both sides of the brush holder 2, with a compact structure and a reasonable design.

[0041] like Figure 3 and Figure 4 As shown, the end cover 6 of this embodiment includes an integrally formed shell bottom end 61, a shell middle end 62, a shell top end 63, and a shell inner cavity 64. The shell bottom end 61 is provided with a plurality of positioning holes 65. The shell middle end 62 is connected between the shell bottom end 61 and the shell top end 63. The shell top end 63 protrudes outward from the shell middle end 62. The shell inner cavity 64 is provided inside the end cover 6 and is used to place bearings and rotating shafts. Specifically, the integrally formed shell bottom end 61, the shell middle end 62, the shell top end 63, and the shell inner cavity 64 form the end cover 6. The shell top end 63 protrudes outward from the shell middle end 62. The shell inner cavity 64 is provided inside the end cover 6 to accommodate the bearings and rotating shaft. The end cover 6 is covered on the housing 1, which can effectively utilize space, while improving the working stability of the motor and reducing the energy consumption of the motor.

[0042] like Figure 2 、 Figure 3 and Figure 4As shown, the end surface of the brush holder 2 of this embodiment is provided with a plurality of positioning posts 27 that mate with positioning holes 65. The first terminals 3 and the second terminals 4 extend through the positioning holes 65 and protrude out of the end cover 6. Specifically, the brush holder 2 is connected via the plurality of positioning posts 27 corresponding to the plurality of positioning holes 65, allowing the end cover 6 to be stably fitted to the housing 1. The first terminals 3 and the second terminals 4 extend through the positioning holes 65 and protrude out of the end cover 6 to facilitate connection to an external circuit.

[0043] like Figure 3 and Figure 4 As shown, the inner wall of the housing 1 of this embodiment is circumferentially provided with an embedding edge 11 for the end cover 6 to embed. Specifically, the housing 1 is matched with the end cover 6 through the embedding edge 11, so that the end cover 6 can seal the motor structure, effectively reducing the safety hazard of foreign matter from the outside entering the motor.

[0044] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A built-in structure of a motor grounding terminal, characterized by: The electric motor of claim 1, wherein the first terminal and the second terminal are respectively provided on both sides of the brush holder, and a grounding terminal is provided on the side of the brush holder close to the first terminal, one end of the grounding terminal abuts the first terminal, and the other end of the grounding terminal abuts the housing, and an end cover is provided on the end of the housing close to the brush holder, and the grounding terminal comprises an integrally formed fixing plate, a first elastic arm and a second elastic arm, the end of the first elastic arm is bent to form an abutting portion, and the abutting portion comprises a first convex abutting surface, a first inward abutting surface, a second convex abutting surface and a second inward abutting surface connected in sequence into a wavy shape, the first convex abutting surface and the second convex abutting surface both abut against the housing, and the first inward abutting surface and the second inward abutting surface both abut against the brush holder, the outer wall of the second elastic arm is convexly provided with a protrusion, the inner side wall of the first terminal is concavely provided with a groove, the protrusion abuts against the groove, and the inner wall of the housing is circumferentially provided with an embedding edge for embedding the end cover.

2. The built-in structure of the motor grounding terminal according to claim 1, characterized in that: The first terminal and the second terminal are connected to the first brush arm and the second brush arm respectively. The first terminal and the second terminal are arranged perpendicular to the first brush arm and the second brush arm respectively. The ends of the first terminal and the second terminal are respectively provided with a first connecting column and a second connecting column. The end of the first brush arm is provided with a first connecting hole connected to the first connecting column, and the end of the second brush arm is provided with a second connecting hole connected to the second connecting column.

3. The built-in structure of the motor grounding terminal according to claim 2, characterized in that: A first insertion cavity and a second insertion cavity are respectively provided on both sides of the brush holder, the first terminal and the first brush arm are both inserted into the first insertion cavity, two first abutting columns are arranged at intervals on one side of the first insertion cavity, and two second abutting columns are arranged at intervals on the other side of the first insertion cavity, an insertion groove for inserting the second elastic arm is provided between the two first abutting columns, the two second abutting columns are both abutted against the first brush arm, an accommodating groove for accommodating the first elastic arm is provided on the outer side of the brush holder, and the second terminal and the second brush arm are both inserted into the second insertion cavity.

4. The built-in structure of a motor grounding terminal according to claim 1, characterized in that: The end cover includes an integrally formed shell bottom end, shell middle end, shell top end and shell inner cavity. The shell bottom end is provided with a plurality of positioning holes. The shell middle end is connected between the shell bottom end and the shell top end. The shell top end protrudes outward from the shell middle end. The shell inner cavity is arranged inside the end cover and is used to place bearings and rotating shafts.

5. The built-in structure of the motor grounding terminal according to claim 4, characterized in that: The end surface of the brush holder is provided with a plurality of positioning posts matching the positioning holes, and the first terminal and the second terminal pass through the positioning holes and protrude out of the end cover.

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