Motor grounding connecting piece and mounting structure thereof

Abstract

The utility model provides a motor grounding connecting piece, which comprises a substrate, a clamping end head connected with a first side edge of the substrate and a grounding end head connected with a second side edge of the substrate, and is characterized in that the clamping end head comprises a clamping part which is vertically arranged towards one side of a lower base surface of the substrate and a corner part which is in transition connection with the clamping part and the substrate; the grounding terminal is provided with a through wire connecting hole. According to the utility model, the grounding connecting piece can be connected with the motor through the clamping end, and the grounding end arranged on the grounding connecting piece is connected with the ground wire, so that the grounding of the motor is realized, and the clamping end is inserted and fixed with the stator iron core in the direction perpendicular to the substrate, so that the substrate cannot move in the radial direction of the stator iron core, and the installation stability is strong; in addition, alignment operation between holes is not needed, the requirement for installation precision is low, screws are not needed in the installation process, and the assembling efficiency of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to a motor grounding connector. Background Art

[0002] The function of grounding is to connect the conductive parts of the equipment that should not be charged directly to the earth through wires. On the one hand, it can prevent people from electric shock and improve the safety of the equipment. On the other hand, it can eliminate the interference of static electricity on the operation of the equipment and improve the stability of the equipment operation. It is usually necessary in equipment such as motors where there is induced voltage. In the traditional method, when connecting the grounding wire to the motor, it is necessary to tap the motor end cover to form a screw hole, and then use the screws installed in the screw hole to connect the grounding wire to the motor end cover. This method has low work efficiency and high scrap rate of tapping. It also usually requires the addition of gaskets and other components to improve the connection stability, which increases the manufacturing cost of the motor.

[0003] The patent document with publication number CN208924048U discloses a connection structure between a motor grounding wire and an end cover. In the connection structure, the end cover is provided with a protruding connection column, and a grounding terminal for connecting the grounding wire is sleeved on the connection column, eliminating the tapping step in the traditional method. However, after the grounding terminal is sleeved on the connecting column, the upper end of the connecting column needs to be riveted to form a limiting structure to prevent the grounding terminal from falling out. There is still a problem of complicated operating procedures.

[0004] The patent document with publication number CN219287326U discloses a grounding plate structure for a motor BMC end cover. The grounding plate is plugged and fixed on the cover body, and its clearance hole is docked with the mounting hole of the cover body. When the cover body is subsequently installed on the motor structure, the grounding plate can be limited by screws passing through the mounting hole and the clearance hole, and the grounding plate can be crimped and fixed from both sides by using the cover body and the motor. The technical solution has a relatively simple process and does not require additional equipment to fix the grounding piece. However, when the grounding plate is plugged into the cover body, the clearance hole and the mounting hole must be aligned with a high accuracy to ensure the normal installation of the subsequent screws. Before the cover body is installed on the motor structure, the grounding plate can be restricted in movement under vibration, which may affect the subsequent installation. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a motor grounding connector, which is easy to install, has strong connection stability, has low requirements on operation accuracy, and improves the motor assembly efficiency.

[0006] In order to achieve the above purpose, the utility model adopts the following technical means:

[0007] A motor grounding connector comprises a substrate, a clamping terminal connected to a first side of the substrate and a grounding terminal connected to a second side of the substrate, wherein the clamping terminal comprises a clamping portion vertically arranged toward a lower base surface of the substrate and a corner portion transitionally connecting the clamping portion and the substrate, and the grounding terminal is provided with a through wire connection hole.

[0008] Furthermore, the first side edge of the substrate includes a first abutment surface and two outer protrusions arranged on the first abutment surface, the two outer protrusions are located on both sides of the clamping end and have a distance between them, the extended end of the outer protrusion forms a second abutment surface parallel to the first abutment surface, and the corner portion is connected to the first abutment surface.

[0009] Furthermore, an extension distance of the outer protrusion relative to the connection end surface is smaller than an extension distance of the corner portion relative to the connection end surface.

[0010] Furthermore, the second side of the substrate has an inner recess, which includes an inner recess bottom surface and an inner recess side surface vertically connected to the inner recess bottom surface, and the ground terminal is connected to the inner recess side surface, with a spacing between the ground terminal and the inner recess side surface.

[0011] Furthermore, the first side edge is adjacent to the second side edge, and the inner notch is arranged at the junction of the first side edge and the second side edge.

[0012] Furthermore, the extension distance of the ground terminal on the substrate plane does not exceed the length of the concave side surface.

[0013] Furthermore, the edge of the substrate is provided with a rounded flange, and the rounded flange is turned toward the lower base surface of the substrate.

[0014] Furthermore, the rounded flange is arranged on the second side and the third side opposite to the first side, and a positioning bayonet is arranged on the flange.

[0015] Furthermore, the ground terminal is bent and extended toward one side of the lower base surface of the substrate.

[0016] Another object of the utility model is to provide an installation structure of the above-mentioned motor grounding connector, which includes a grounding connector and a stator core, wherein the stator core includes an outer ring portion, a winding bracket connected to the inner side of the outer ring portion, and an inner ring portion connected to the inner end of the winding bracket, and a radially recessed clamping groove is provided on the outer side surface of the outer ring portion, and the clamping groove extends in the axial direction of the stator core and passes through the upper end surface and the lower end surface of the outer ring portion, and a limiting portion is formed at the notch of the clamping groove; the clamping end of the grounding connector is clamped into the clamping groove from the upper end surface or the lower end surface of the outer ring portion, and the width of the limiting portion is smaller than the width of the clamping portion.

[0017] The application of the utility model can achieve the following beneficial effects:

[0018] 1. The utility model can connect the grounding connector to the stator core of the motor through a clamping terminal, and connect the grounding terminal arranged on the grounding connector to the ground wire to achieve grounding of the motor. The clamping terminal is plugged and fixed to the stator core in a direction perpendicular to the substrate, so that the substrate cannot move in the radial direction of the stator core, and the installation stability is strong.

[0019] 2. The utility model does not require alignment operations between holes, has low installation accuracy requirements, and does not require the use of screws during the installation process, which is beneficial to improving the assembly efficiency of the motor.

[0020] 3. In some implementations of the utility model, the projection of the ground terminal on the substrate is located in the inner recess, so that the ground terminal is protected by the main frame of the substrate and is not easily deformed due to collision.

[0021] 4. In some embodiments of the present invention, the edge of the substrate is also provided with a rounded flange, which can reduce collision damage to the edge of the substrate and enhance the bending strength of the substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of a grounding connector in an embodiment;

[0023] Figure 2 A schematic diagram of the installation structure of the grounding connector in the embodiment;

[0024] In the figure, 1-substrate, 11-first abutting surface, 12-external convex portion, 121-second abutting surface, 13-inner recess, 131-inner recess bottom surface, 132-inner recess side surface, 14-lower base surface, 2-clamping terminal, 21-clamping portion, 22-corner portion, 3-grounding terminal, 31-wire connection hole, 4-rounded flange, 41-positioning clamping port, 5-stator core, 51-outer ring portion, 511-outer ring arc surface, 512-outer ring plane, 52-winding bracket, 53-inner ring portion, 54-clamping groove, 541-limiting portion, L1-first side edge, L2-second side edge, L3-third side edge. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0026] like Figure 1As shown, this embodiment provides a grounding connector for a motor, which includes a substrate 1 with a substantially rectangular structure, a clamping terminal 2 arranged on a first side L1 of the substrate, and a grounding terminal 3 arranged on a second side L2 of the substrate, wherein the clamping terminal 2 is used to be fixedly connected to the motor structure, and the grounding terminal 3 is used to be connected to a grounding wire. The grounding connector is made of a metal material with good electrical conductivity to achieve the transfer of charge from the clamping terminal to the grounding terminal and introduce it into the earth through the grounding wire; the first side L1 is provided with a first abutting surface 1 perpendicular to the plane of the substrate 1, two convex parts 12 are arranged on the first abutting surface and extend outwardly relative to the first abutting surface, the convex parts are arranged flush with the substrate body, and the convex ends of the convex parts are formed on the second abutting surface 121 parallel to the first abutting surface 11, the clamping end head 2 is connected to the middle part of the first abutting surface 11, and a spacing is left between the clamping end head and the convex parts 12 on both sides; the clamping end head includes a clamping part 21 extending toward one side of the lower base surface 14 of the substrate and a corner part 22 transitionally connecting the substrate and the clamping part, the corner part is an arc-shaped structure, and the steering angle of the corner part The angle is 90°, so that the extending direction of the clamping portion is perpendicular to the substrate; the second side L2 is provided with an inner recess 13, and the inner recess has an inner recess bottom surface 131 and an inner recess side surface 132. In this embodiment, since the inner recess 13 is arranged at the junction of the first side L1 and the second side L2, the inner recess has only one inner recess side surface 132. In other embodiments, the inner recess can also be arranged in the middle of the second side. In this case, the inner recess will have two inner recess side surfaces located on both sides; the grounding terminal 3 is connected to the inner recess bottom surface 131, and the side of the grounding terminal is connected to the inner recess bottom surface 131. There is a spacing between the concave side surfaces, and the grounding terminal extends obliquely toward the lower base surface 14 of the substrate and forms an angle with the substrate. The projection of the grounding terminal on the lower base surface relative to the extension distance of the concave bottom surface 131 is less than the length of the concave side surface 132, so that when the second side L2 of the grounding connector is horizontally impacted, the impact force will not be applied to the grounding terminal 3, thereby avoiding bending and deformation of the grounding terminal. At the same time, the angle structure between the grounding terminal and the substrate can facilitate the installation of the grounding wire. A wire connection hole 31 is provided on the grounding terminal to improve the stability of the wire installation. In order to enhance the structural strength of the substrate and reduce collision losses, a rounded flange 4 can also be provided at the edge of the substrate. Preferably, the rounded flange is folded toward the lower base surface so that the upper base surface of the substrate is a planar structure, which is convenient for fitting with other components. Since the flange structure has a high physical strength, a positioning bayonet 41 can also be provided on the flange structure to engage with other components. In order to facilitate the coordination between different components in the motor structure, some corresponding shape clearance holes can also be provided on the substrate, such as Figure 1 As shown, a first evacuation hole with an irregular polygonal structure is arranged in the middle of the substrate, and a circular second evacuation hole is arranged at the second side L2 of the substrate.

[0027] Figure 2 Provided Figure 1 The mounting structure of the grounding connector shown in the figure includes a stator core 5 of the motor and the grounding connector installed on the stator core. The stator core includes an outer ring portion 51, a winding bracket 52 connected to the inner side of the outer ring portion, and an inner ring portion connected to the inner end of the winding bracket 52. A radially recessed clamping groove 54 is provided on the outer side of the outer ring portion. The clamping groove extends in the axial direction of the stator core and passes through the upper and lower end surfaces of the outer ring portion. The clamping end 2 of the grounding connector is inserted into the clamping groove 54 from the upper end surface of the outer ring portion, so that the clamping portion 21 is matched and fixed with the clamping groove, and the corner portion 22 is used to make the substrate 1 is located on the radial outer side of the stator core, and the width of the clamping groove gradually decreases in the opening direction, so that a limiting portion 541 is formed at the groove position, and the width of the clamping portion is greater than the width of the limiting portion to prevent the clamping portion from radially escaping; an outer ring arc surface 511 with a convex structure is formed in the middle of the outer side surface of the outer ring portion, and outer ring planes 512 are formed on both sides of the outer ring arc surface, the first abutting surface 11 is connected to the outer ring arc surface, and the second abutting surface 121 is matched with the outer ring plane, and the spacing between the first abutting surface and the second abutting surface is large enough to accommodate the convex structure of the outer ring arc surface 511 between the two outer convex portions 12. Figure 2 Only the positioning and installation structure of the grounding connector on the stator core is shown. In actual application, it is not limited to the stator core. It only needs to be provided with a shape and a shape on the basic component used to install the grounding connector. Figure 2 A card slot with a similar structure in the middle can be used.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A motor grounding connector, characterized in that: It includes a base plate, a clamping terminal connected to the first side of the base plate and a grounding terminal connected to the second side of the base plate. The clamping terminal includes a clamping portion vertically arranged toward the lower base surface of the base plate and a corner portion transitionally connecting the clamping portion and the base plate. The grounding terminal is provided with a through wire connection hole.

2. The motor grounding connector according to claim 1, characterized in that: The first side edge of the substrate includes a first abutment surface and two external protrusions arranged on the first abutment surface, the two external protrusions are located on both sides of the clamping end and have a distance between them, the extended end of the external protrusion forms a second abutment surface parallel to the first abutment surface, and the corner portion is connected to the first abutment surface.

3. A motor grounding connector according to claim 2, characterized in that: An extension distance of the outer protrusion relative to the connection end surface is smaller than an extension distance of the corner portion relative to the connection end surface.

4. The motor grounding connector according to claim 1, characterized in that: The second side of the substrate has an inner recess, which includes an inner recess bottom surface and an inner recess side surface vertically connected to the inner recess bottom surface. The ground terminal is connected to the inner recess side surface, and a distance is left between the ground terminal and the inner recess side surface.

5. The motor grounding connector according to claim 4, characterized in that: The first side edge is adjacent to the second side edge, and the inner notch is arranged at the junction of the first side edge and the second side edge.

6. The motor grounding connector according to claim 4, characterized in that: The extension distance of the ground terminal on the substrate plane does not exceed the length of the concave side surface.

7. The motor grounding connector according to claim 1, characterized in that: The edge of the substrate is provided with a rounded flange, and the rounded flange is turned toward the lower base surface of the substrate.

8. The motor grounding connector according to claim 7, characterized in that: The rounded flange is arranged on the second side and the third side opposite to the first side, and a positioning bayonet is arranged on the flange.

9. The motor grounding connector according to claim 1, characterized in that: The ground terminal is bent and extended toward one side of the lower base surface of the substrate.

10. A motor grounding connector installation structure, characterized in that: It comprises a stator core and a grounding connector as claimed in any one of claims 1 to 9 installed on the stator core, wherein the stator core comprises an outer ring portion, a winding bracket connected to the inner side of the outer ring portion and an inner ring portion connected to the inner end of the winding bracket, a radially recessed snap-in groove is provided on the outer side surface of the outer ring portion, the snap-in groove extends in the axial direction of the stator core and passes through the upper end surface and the lower end surface of the outer ring portion, and a limiting portion is formed at the notch of the snap-in groove; the snap-in end of the grounding connector is snapped into the snap-in groove from the upper end surface or the lower end surface of the outer ring portion, and the width of the limiting portion is smaller than the width of the snap-in portion.

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