Coil support for motor

Abstract

The utility model discloses a coil support for a motor. The coil support comprises a connector receiving device, a coil holder and a wiring PCB, wherein the interior of the connector receiving device is cylindrical and hollow; the coil holder is arranged in the hollow part of the connector receiving device; a plurality of connecting cable containing grooves are formed in the surface of the connector receiving device along the edge of the connector receiving device, a plurality of coil containing grooves used for containing coils are formed in the side, away from the connector receiving device, of the coil holder, the PCB is located below the coil holder, and input wire pins and output wire pins on the coils are correspondingly welded to the connecting PCB. The wiring PCB is connected with a plurality of external cables through a three-phase lead. The coil supporting device is used for accurately positioning and supporting a plurality of coils, wiring interconnection between an input wire and an output wire of a coil wire and an external cable is simplified, and the coils and the cable are prevented from being damaged when the coils are assembled.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field especially relates to a coil support for motor. BACKGROUND

[0002] At present, coil support is generally used in motor as the fixing of the upper wire coil, and the positioning of the coil will affect the performance of the motor. Therefore, the accurate positioning of the coil relative to the coil support is the most important. In addition, the input and output lines of the coil need to be connected to the cable in order to provide current for the coil. For small size motor, the difficulty for the operator is to connect the input and output lines of the coil with the corresponding cable, and to put all the wires and cables in a very limited space.

[0003] After assembling all the components (coil support, coil, cable and sensor) and completing all the electrical connections, the whole needs to be put into a suitable sealed shell, and epoxy resin is poured into the sealed shell to fix the coil in the corresponding coil accommodating groove. The assembly operation is a sensitive program, because the operator must ensure that all the wires and cables are closed and kept in a specific area to prevent any damage to the cables and wires when the epoxy resin is injected into the shell. In addition, regulatory standards require a creepage distance of solid insulating material on the surface of two conductive parts, which is difficult to achieve in a very limited space.

[0004] Therefore, it is necessary to provide a coil support for motor to solve the above problems. SUMMARY

[0005] In order to overcome the above-mentioned defects, the purpose of the utility model is to provide a coil support for motor, which is used for accurate positioning and supporting multiple coils, simplifying the wiring interconnection between the input and output lines of the coil and the cable, and preventing the coil and cable from being damaged during assembly.

[0006] In order to achieve the above purpose, the utility model adopts the technical scheme: a coil support for motor, comprising a connector receiving device with a hollow cylindrical interior, a coil holder installed in the hollow part, and a wiring PCB board; a plurality of connection cable accommodating grooves are opened on the surface of the connector receiving device along the edge thereof, a plurality of coil accommodating grooves for placing coils are opened on the side of the coil holder away from the connector receiving device, the wiring PCB board is located below the coil holder, the input and output line pins on the coil are correspondingly welded to the wiring PCB board, and the wiring PCB board is interconnected with a plurality of external cables through three-phase leads.

[0007] Further, the coil holder is provided with a plurality of groups of plug holes corresponding to the coil accommodating grooves along the height direction of the coil holder. Each group of plug holes includes a coil input wire through hole and a coil output wire through hole. The input wire and the output wire of each coil can pass through the coil input wire through hole and the coil output wire through hole from top to bottom and be welded to the corresponding position on the connecting PCB board. This ensures that the positions of the input wire and the output wire of each coil will not be disordered, effectively improving the working efficiency of the wire and cable interconnection, and avoiding damage to the cable and the wire.

[0008] Further, the connecting PCB board is provided with a plurality of welding holes corresponding to the plug hole groups and three three-phase lead holes. After a plurality of coils are welded on the connecting PCB board, three three-phase leads are drawn out of the connecting PCB board. One end of each three-phase lead is fixed in the three-phase lead hole, and the other end is connected to three external cables. In this way, the interconnection of a plurality of coils and external cables is realized, and the number of interconnected cables is small. Compared with connecting a plurality of coils to external cables one by one, the connection method of the present application is more simple and beautiful.

[0009] Further, the coil holder is annular, and a plurality of coil accommodating grooves are provided on the coil holder from top to bottom. The plurality of coil accommodating grooves are arranged along the circumference of the center line of the coil holder. The circumferential array of the coil accommodating grooves makes the placement of the plurality of coils more orderly, facilitating the subsequent welding of the pins of the coils to the welding holes on the corresponding connecting PCB board.

[0010] The provision of the cylindrical wall can increase the creepage distance between the three-phase lead and the corresponding cable, thereby increasing the insulation strength of the connecting PCB board. The outer periphery of the coil holder is in contact with the inner circle of the connector receiving device.

[0011] Further, the two adjacent coil accommodating grooves are separated by a partition wall. The partition wall includes a left wall surface and a right wall surface, and the left wall surface and the right wall surface converge and connect at one end close to the center of the coil holder. The partition wall gradually converges from the side close to the connector receiving device to the center of the coil holder, so that its occupied area gradually decreases, making it more convenient for coil placement and saving production costs.

[0012] Further, the connecting PCB board is annular and is in contact with the hollow inner wall of the connector receiving device. The connecting PCB board is used to integrate the signals of a plurality of coils thereon, so that only three three-phase leads on the connecting PCB board need to be connected to external cables to realize the interconnection of the cables and the coils.

[0013] Further, the thickness of the connecting PCB board is greater than 0.8 mm. In some embodiments, the thickness of the connecting PCB board is 1 mm.

[0014] Further, the connection cable accommodating grooves are grouped into three, and three groups of the connector receiving devices are arranged on the connector receiving devices, and a plurality of threaded mounting holes are arranged on the connector receiving devices to fix the coil support on the mounting surface by locking screws. The three groups of connection cable accommodating grooves can be used to interconnect a plurality of three-phase lead wires and corresponding cables, and then the three-phase lead wires and the cables are inserted and placed to ensure that the wire harnesses are not messy, and the three-phase lead wires and the cables do not interfere with each other after being connected.

[0015] The utility model discloses the beneficial effects of:

[0016] The connector receiving device, the coil holder, the connection cable accommodating groove, the coil accommodating groove and the wiring PCB board in the utility model are matched with each other, the coil accommodating groove is used for accurately positioning and supporting a plurality of coils to prevent the coil from being damaged during assembly with the cable, and a plurality of coils, wiring PCB boards and external cables are sequentially and electrically connected, so that the wiring interconnection between the input line and the output line of the coil wire and the external cable is effectively simplified. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is the overall structure axial side view of an embodiment of the utility model;

[0018] Fig. 2 It is the partial structure axial side view of an embodiment of the utility model;

[0019] Fig. 3 It is the overall structure axial side view of the wiring PCB board of an embodiment of the utility model;

[0020] In the drawing: 1, connector receiving device; 2, coil holder; 3, wiring PCB board; 31, welding hole; 32, three-phase lead hole; 4, threaded mounting hole; 5, connection cable accommodating groove; 6, coil accommodating groove; 7, partition wall; 71, left wall surface; 72, right wall surface; 8, coil input line through hole; 9, coil output line through hole. DETAILED DESCRIPTION

[0021] The preferred embodiments of the utility model are described in detail below with reference to the drawings, so that the advantages and characteristics of the utility model can be more easily understood by those skilled in the art, and the protection scope of the utility model can be more clearly and explicitly defined.

[0022] Referring to the drawings Figs. 1 to 3As shown, the coil support for the motor in the embodiment comprises a connector receiving device 1 with a hollow cylindrical interior, a coil holder 2 installed in the hollow part, and a wiring PCB board 3; the surface of the connector receiving device 1 is provided with a plurality of connecting cable accommodating grooves 5 along the edge thereof, and the side of the coil holder 2 away from the connector receiving device 1 is provided with a plurality of coil accommodating grooves 6 for placing coils, the plurality of coil accommodating grooves 6 are used for accurately positioning and supporting a plurality of coils, specifically, a single coil is fixed in the corresponding coil accommodating groove 6 by welding, and one coil is placed in each coil accommodating groove 6, and the coils do not interfere with each other.

[0023] The wiring PCB board 3 is located below the coil holder 2, the input and output line pins on the coil are welded to the wiring PCB board 3, and the wiring PCB board is interconnected with a plurality of external cables through three-phase leads. The pin ends of the input and output lines on each coil are welded to the PCB board below to lead the signals on the plurality of coils to the wiring PCB board 3, without connecting the input and output lines on the plurality of coils with the external cables one by one, which reduces the labor intensity of the workers and also reduces the wiring caused by the interconnection of the coils and the external cables, making the wiring between the cables more convenient and avoiding the disorder caused by too many cables.

[0024] Specifically, the connector receiving device 1 and the coil holder 2 are integrally formed.

[0025] A plurality of wire insertion hole groups corresponding one-to-one to the coil accommodating grooves 6 are provided on the coil holder 2 along the height direction thereof, and each wire insertion hole group comprises a coil input line through hole 8 and a coil output line through hole 9. The input and output lines on each coil can be passed from the coil input line through hole 8 and the coil output line through hole 9 from top to bottom and welded to the corresponding position on the wiring PCB board 3, which ensures that the positions of the input and output lines on each coil do not appear staggered and disordered, effectively improves the work efficiency of the interconnection of the wires and cables, and also avoids damage to the cables and wires.

[0026] A plurality of welding holes 31 corresponding to the wire insertion hole groups and three three-phase lead holes 32 are provided on the wiring PCB board 3. After a plurality of coils are welded to the wiring PCB board 3, three three-phase leads are led out from the wiring PCB board 3, wherein one end of each three-phase lead is fixed at the three-phase lead hole 32, and the other end is connected with three external cables respectively, thereby realizing the interconnection of the plurality of coils and the external cables, and the number of interconnected cables is small, and compared with connecting the plurality of coils with the external cables one by one, the connection method of the present application is more simple and beautiful.

[0027] Specifically, when welding the connecting PCB board 3 and the coil, the input and output lines on each coil pass through the corresponding coil input line through hole 8 and coil output line through hole 9 and move downward until just passing through the welding hole 31, and then the pins of the input and output lines on the coil are directly welded at the welding hole 31 of the connecting PCB board 3 by a welding machine, realizing the electrical connection between the coil and the connecting PCB board 3.

[0028] The one-to-one corresponding position design of the coil wire and the cable can also simplify the wiring interconnection between the two, facilitating the operation of the staff.

[0029] The coil holder 2 is annular, and a plurality of coil accommodating grooves 6 are arranged through from top to bottom on the coil holder 2, and the plurality of coil accommodating grooves 6 are arranged in a circumferential array along the center line of the coil holder 2. The circumferential array of the coil accommodating grooves 6 makes the placement of the plurality of coils more orderly, facilitating the subsequent welding of the pins of the coils and the corresponding welding holes 31 on the connecting PCB board 3.

[0030] In some embodiments, the upper surface and the lower surface of the coil holder 2 are both left with a gap between the upper and lower surfaces of the connector receiving device 1, and the connecting PCB board 3 is arranged in the gap left between the lower surface of the coil holder 2 and the lower surface of the connector receiving device 1. The gap is a cylindrical wall, and the height of the cylindrical wall is greater than 5 mm. Specifically, the height of the cylindrical wall is between 6-7 mm.

[0031] The provision of the above-mentioned cylindrical wall can increase the creepage distance between the three-phase lead and the corresponding cable, thereby increasing the insulation strength of the connecting PCB board 3. The outer periphery of the coil holder 2 is in contact with the inner circle of the connector receiving device 1.

[0032] The two adjacent coil accommodating grooves 6 are separated by a partition wall 7, and the partition wall 7 includes a left wall surface 71 and a right wall surface 72, which converge and connect at one end close to the center of the coil holder 2. The partition wall 7 gradually converges towards the center of the coil holder 2 from the side close to the connector receiving device, so that its occupied area gradually decreases, making it more convenient for coil placement, and also saving production costs.

[0033] The connecting PCB board 3 is annularly arranged, and its periphery is in contact with the hollow inner wall of the connector receiving device 1. The connecting PCB board 3 is arranged for integrating the signals of a plurality of coils thereon, so that only three three-phase leads thereon need to be connected with external cables, thereby realizing the interconnection between the cables and the coils.

[0034] In some embodiments, the radial thickness of the connecting PCB board 3 covers at least the coils, which can support the coils on one hand, and ensure that each coil is always located in the limited space formed by the connecting PCB and the single coil accommodating groove 6 during subsequent pouring of epoxy resin to fix the coils, so that the coils will not be damaged.

[0035] The thickness of the connecting PCB board 3 is greater than 0.8 mm. In some embodiments, the thickness of the connecting PCB board 3 is 1 mm.

[0036] The connecting cable accommodating grooves 5 are arranged in groups of three, and three groups of the connecting cable accommodating grooves 5 are arranged on the connector receiving device 1. The connector receiving device 1 is also provided with a plurality of threaded mounting holes 4 to fix the coil support on the mounting surface by locking screws. The arrangement of three groups of connecting cable accommodating grooves 5 can accommodate a plurality of groups of three-phase leads and corresponding cables after interconnection, so as to ensure that the wiring harnesses will not be messy, and the plurality of groups of three-phase leads and cables will not interfere with each other after connection.

[0037] The connecting cable accommodating grooves 5 are used to position the new cables formed by the connected cables and three-phase leads after welding and interconnection. The new cables can be stored in separate spaces while protecting the cables and wires on the coils, so as to avoid damage to the cables and wires when the coil support is installed in the sealed shell and the epoxy resin is injected into the sealed shell to fix the coils compared to the position of the coil holder 2. It should be noted that the epoxy resin can also ensure that the coil support has good insulation.

[0038] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A coil support for an electric machine, characterized by: The connector receiving device is internally hollow in a cylindrical shape, the coil holder is installed in the hollow part, and the wiring PCB board is provided; a plurality of connecting cable accommodation grooves are formed along the edge of the surface of the connector receiving device, a plurality of coil accommodation grooves for placing coils are formed on the side of the coil holder away from the connector receiving device, the wiring PCB board is located below the coil holder, the input and output line pins on the coil are correspondingly welded to the wiring PCB board, and the wiring PCB board is interconnected with a plurality of external cables through three-phase leads.

2. A coil support for an electric machine according to claim 1, characterized in that: A plurality of wire insertion hole groups corresponding to the positions of the coil accommodation grooves are formed through the coil holder along the height direction of the coil holder, each of the wire insertion hole groups includes a coil input line through hole and a coil output line through hole.

3. A coil support for an electrical machine according to claim 2, characterised in that: A plurality of welding holes corresponding to the positions of the wire insertion hole groups and three three-phase lead holes are formed on the wiring PCB board.

4. The coil support for an electric machine according to claim 1, characterized in that: The coil holder is annular, a plurality of coil accommodation grooves are arranged through the coil holder from top to bottom, and the plurality of coil accommodation grooves are arranged in a circular array along the center line of the coil holder.

5. A coil support for an electrical machine according to claim 4, characterised in that: Two adjacent coil accommodation grooves are separated by a partition wall, the partition wall includes a left wall surface and a right wall surface, and the left wall surface and the right wall surface converge and connect at one end close to the center of the coil holder.

6. The coil support for an electric machine according to claim 1, characterized in that: The wiring PCB board is annular, and the periphery of the wiring PCB board is in contact with the hollow inner wall of the connector receiving device.

7. A coil support for an electrical machine according to claim 6, characterised in that: The thickness of the wiring PCB board is greater than 0.8 mm.

8. The coil support for an electric machine according to claim 1, characterized in that: Every three connecting cable accommodation grooves form a group, and three groups of connecting cable accommodation grooves are arranged on the connector receiving device, a plurality of threaded mounting holes are arranged on the connector receiving device, and the coil support is fixed on the mounting surface by locking screws.

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