A welding joint fixing frame and external plate DC motor

Abstract

The present invention discloses a welding port fixing frame and an external plate DC motor, which relate to the technical field of motors, and solve the technical problem of the complicated process flow required for using a terminal block to lead out the three-phase winding of a DC motor in the prior art. The welding port fixing frame includes a base plate and a welding port fixing portion, the base plate is fixed on the stator frame, the welding port fixing portion is arranged on the base plate, and the welding port fixing portion is used to fix the welding port of the enameled wire and the power line. Using the welding port fixing frame of the present invention, only one welding step is required, namely the welding of the enameled wire and the power line. Compared with the prior art process of using a terminal block to lead out the three-phase winding of a DC motor, which requires at least two welding steps, the welding port fixing frame of the present invention has the advantage of simplifying the production process of the external plate DC motor.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a weld fixing frame and an external plate DC motor. Background Art

[0002] Most of the current DC motors have the control board and the load power board built together, which means that the DC motor only needs to lead out the three wires of the winding and connect them directly to the load control board. The external board DC motor is a three-phase motor, and the three-phase winding needs to be connected to three power lines when it is led out. Now the market basically uses a wiring board as a transition board for the DC three-phase enameled wire to be led out. The wiring board in the prior art is generally a PCB circuit board; the welding process is to weld the winding enameled wire to one end of the wiring board, and then weld the power line to the other end of the wiring board, and the three-phase winding of the DC motor is led out through two welding processes.

[0003] However, the applicant has found that the prior art of using PCB circuit boards as terminal blocks has at least the following defects: the three-phase winding requires the enameled wire to be welded to the terminal board first, and then the power line is welded to the terminal board to achieve the lead-out of the three-phase winding, that is, the process requires at least two welding steps and the process flow is complicated; on the other hand, the use of PCB circuit boards is costly, resulting in high motor production costs. Summary of the invention

[0004] One of the purposes of the present invention is to provide a welding joint fixing frame, which solves the technical problem of the complicated process flow required for leading out the three-phase winding of a DC motor using a terminal block in the prior art. The many technical effects that can be produced by the preferred technical solution of the present invention are described in detail below.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The weld joint fixing frame of the present invention comprises a base plate and a weld joint fixing portion, wherein the base plate is fixed on the stator frame, the weld joint fixing portion is arranged on the base plate, and the weld joint fixing portion is used to fix the weld joint between the enameled wire and the power line.

[0007] According to a preferred embodiment, the welding port fixing portion includes three fixing components, and the positions of the three fixing components correspond to the positions of the enameled wire outlets, so that the welding ports of the three enameled wires and the corresponding power lines are fixed respectively by the three fixing components.

[0008] According to a preferred embodiment, each of the fixing components includes at least one fixing foot, and the fixing foot is a slot structure, so as to fix the welding joint between the enameled wire and the power line through the slot structure.

[0009] According to a preferred embodiment, each of the fixing components comprises two fixing feet.

[0010] According to a preferred embodiment, a fixing portion is provided on the bottom plate, and the fixing portion is used to be connected to the stator frame, so that the bottom plate is fixed to the stator frame through the connection between the fixing portion and the stator frame.

[0011] According to a preferred embodiment, the fixing portion includes an avoidance groove located at the outer edge of the base plate and corresponding to the position of the stator frame fixed hook, so as to limit the movement of the base plate in the axial direction through the buckling between the avoidance groove and the fixed hook.

[0012] According to a preferred embodiment, the fixing portion includes a circular hole located on the bottom plate and corresponding to the boss of the stator frame, so as to limit the movement of the bottom plate in the radial direction through the engagement between the circular hole and the boss.

[0013] According to a preferred embodiment, the bottom plate is made of plastic injection molding or die casting, and the thickness of the bottom plate is 2 to 3 mm.

[0014] According to a preferred embodiment, the bottom plate is a semicircular or circular structure.

[0015] According to a preferred embodiment, the weld fixing frame further includes an enameled wire through hole, which is located at the outer edge of the base plate and is integrally formed with the base plate, so that the enameled wire passes through the base plate through the enameled wire through hole and is welded to the power line.

[0016] According to a preferred embodiment, the number of the enameled wire through holes is three, and the three enameled wire through holes are arc-shaped structures, and the positions of the three enameled wire through holes respectively correspond to the positions of the enameled wire outlets.

[0017] According to a preferred embodiment, the weld fixing frame further includes a power line through hole, which is located on the bottom plate and is integrally formed with the bottom plate, so that the power line passes through the bottom plate through the power line through hole and is welded to the enameled wire.

[0018] According to a preferred embodiment, the power cord through hole includes a first power cord through hole and a second power cord through hole, and three power cords pass through the first power cord through hole through the upper surface of the base plate, and then pass through the second power cord through hole through the lower surface of the base plate and are welded to the corresponding enameled wire.

[0019] According to a preferred embodiment, the weld fixing frame further comprises a wire clamp, which is located on the bottom plate and is integrally formed with the bottom plate, and is used to fix the power cord.

[0020] According to a preferred embodiment, the wire clamp is a slot structure, so as to fix the power cord through the slot structure.

[0021] According to a preferred embodiment, the wire clamp includes a first wire clamp and a second wire clamp, and the first wire clamp and the second wire clamp are respectively located between two adjacent fixing components, wherein the first wire clamp is used to fix a power wire away from the enameled wire outlet; and the second wire clamp is used to fix two power wires close to the enameled wire outlet.

[0022] Another aspect of the present invention provides an external plate DC motor. The external plate DC motor of the present invention comprises a weld joint fixing frame as described in any technical solution of the present invention.

[0023] The weld fixing frame and the external plate DC motor provided by the present invention have at least the following beneficial technical effects:

[0024] The welding port fixing frame of the present invention comprises a bottom plate and a welding port fixing part, the bottom plate is fixed on the stator frame, the welding port fixing part is arranged on the bottom plate, so that the welding port fixing part is fixed on the stator frame by fixing between the bottom plate and the stator frame, and the welding port fixing part of the present invention is used to fix the welding port of the enameled wire and the power line, that is, the enameled wire and the power line are directly fastened to the welding port fixing part after being welded and wrapped. Using the welding port fixing frame of the present invention only requires one welding step, that is, welding the enameled wire and the power line. Compared with the prior art process of using a terminal block to lead out the three-phase winding of a DC motor, which requires at least two welding steps, the welding port fixing frame of the present invention has the advantage of simplifying the production process of the external board DC motor.

[0025] In addition, the preferred technical solution of the present invention also has the following beneficial technical effects:

[0026] The preferred technical solution of the present invention adopts a solder joint fixing frame made of plastic material to replace the expensive PCB terminal board, which can reduce the cost price of the terminal board by 80%, thereby solving the problem of high cost of the external board of the DC motor, improving the motor production cost, and increasing corporate profits. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 is a schematic diagram of a first preferred embodiment of a weld fixing frame of the present invention;

[0029] Figure 2 It is a schematic diagram of a second preferred embodiment of the weld fixing frame of the present invention.

[0030] In the figure, 1-bottom plate; 2-fixing assembly; 3-fixing foot; 4-enameled wire through hole; 5-first power line through hole; 6-second power line through hole; 7-first wire clamp; 8-second wire clamp; 9-avoidance groove; 10-round hole; 31-fixing plate; 32-inverted structure. DETAILED DESCRIPTION

[0031] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0032] The following is attached to the instruction manual Figure 1 and 2 The weld fixing frame and the external plate DC motor of this embodiment are described in detail.

[0033] The weld joint fixing frame of the present embodiment includes a base plate 1 and a weld joint fixing portion. The base plate 1 is fixed on the stator frame, the weld joint fixing portion is arranged on the base plate 1, and the weld joint fixing portion is used to fix the weld joint between the enameled wire and the power line. The weld joint fixing frame of the present embodiment includes a base plate 1 and a weld joint fixing portion, the base plate 1 is fixed on the stator frame, the weld joint fixing portion is arranged on the base plate 1, so that the weld joint fixing portion is fixed on the stator frame by fixing between the base plate 1 and the stator frame, and the weld joint fixing portion of the present embodiment is used to fix the weld joint between the enameled wire and the power line, that is, the enameled wire and the power line are directly fastened to the weld joint fixing portion after welding and wrapping. Using the weld joint fixing frame of the present embodiment, only one welding step is required, that is, the welding of the enameled wire and the power line. Compared with the prior art process of using a terminal block to lead out the three-phase winding of a DC motor, which requires at least two welding steps, the weld joint fixing frame of the present embodiment has the advantage of simplifying the production process of an external board DC motor.

[0034] According to a preferred embodiment, the welding port fixing part includes three fixing components 2, such as Figure 1 or Figure 2 As shown. Preferably, the positions of the three fixing components 2 correspond to the positions of the enameled wire outlets, so that the welding joints of the three enameled wires and the corresponding power lines can be fixed by the three fixing components 2. Preferably, the positions of the three fixing components 2 correspond to the positions of the three enameled wire outlets, and after the three enameled wires are welded and wrapped with the corresponding power lines, they are directly fixed to the corresponding fixing components so that the welding joints are fixed and not loose, thereby ensuring the stability of the motor and simplifying the production process of the external board DC motor.

[0035] According to a preferred embodiment, each fixing assembly 2 includes at least one fixing foot 3, and the fixing foot 3 is a slot structure, so as to fix the welding joint between the enameled wire and the power line through the slot structure. Preferably, the fixing foot 3 and the base plate 1 are an integrally formed structure. Figure 1 or Figure 2 The fixed foot 3 includes two fixed plates 31, and an inverted structure 32 is provided at the end of the fixed plate 31 away from the base plate 1. The two fixed plates 31 are arranged opposite to each other to form a slot structure, and the opening size of the slot structure away from the base plate 1 is smaller than the opening size close to the base plate 1, so that the enameled wire and the power line welding port can be fixed by the slot structure.

[0036] According to a preferred embodiment, each fixing assembly 2 includes two fixing feet 3, such as Figure 1 or Figure 2 As shown. Preferably, each fixing component 2 includes a fixing foot 3, which can realize the fixing of the welding port of the enameled wire and the power line, that is, three fixing feet 3 are set on the bottom plate 1. For the stability of the motor, four fixing feet 3 can be set on the bottom plate 1 in this embodiment. Specifically, the two fixing components 2 far from the enameled wire outlet include one fixing foot 3, and the fixing components 2 close to the enameled wire outlet include two fixing feet 3. More preferably, each fixing component 2 in this embodiment includes two fixing feet 3.

[0037] According to a preferred embodiment, a fixing portion is provided on the bottom plate 1, and the fixing portion is used to connect with the stator frame, so that the bottom plate 1 is fixed to the stator frame through the connection between the fixing portion and the stator frame. Preferably, the fixing portion includes an avoidance groove 9 located at the outer edge of the bottom plate 1 and corresponding to the position of the stator frame fixed hook, so as to limit the movement of the bottom plate 1 in the axial direction through the buckling between the avoidance groove 9 and the fixed hook. The structure of the avoidance groove 9 is as follows: Figure 1 or Figure 2 Preferably, the fixing portion further includes a circular hole 10 located on the bottom plate 1 and corresponding to the boss of the stator frame, so as to limit the movement of the bottom plate 1 in the radial direction through the engagement between the circular hole 10 and the boss. The structure of the circular hole 10 is as shown in FIG. Figure 1 or Figure 2 shown.

[0038] The preferred technical solution of this embodiment can achieve axial and radial fixation of the bottom plate 1 through the fixing part. Specifically, the stator frame generally has four fixing hooks, and the bottom plate 1 is provided with avoidance grooves at the corresponding fixed hook positions, so that the bottom plate can be pressed into the stator frame and fixed to the stator frame by fastening the avoidance grooves 9 through the fixed hooks, thereby preventing the bottom plate 1 from axial loosening. On the other hand, the bottom plate 1 is also provided with a circular hole 10 for connecting with the boss of the stator frame. When the boss passes through the circular hole 10, the radial fixation of the bottom plate 1 is achieved.

[0039] According to a preferred embodiment, the bottom plate 1 is made of plastic injection molding or die casting, and the thickness of the bottom plate 1 is 2 to 3 mm. The bottom plate 1 of the preferred technical solution of this embodiment is made of plastic injection molding or die casting, and the thickness of the bottom plate 1 is 2 to 3 mm, so as to ensure that the entire weld fixing frame will not bend, be fragile, and other abnormalities. On the other hand, the mold used for injection molding is simple, and the weld fixing frame is highly versatile. Hundreds of external board DC motors in the same series can use the same weld fixing frame.

[0040] Plastic material is a common material in the prior art, and has the advantages of being easy to obtain and low in price compared to PCB circuit boards. The preferred technical solution of this embodiment uses a solder joint fixing frame made of plastic material to replace the expensive PCB wiring board, which can reduce the cost price of the wiring board by 80%, thereby solving the problem of high cost of the external board of the DC motor, improving the production cost of the motor, and increasing the profit of the enterprise.

[0041] According to a preferred embodiment, the bottom plate 1 is a semicircular or circular structure. Figure 1 The schematic diagram of the weld fixing frame with a semicircular bottom plate is shown. Figure 2 The schematic diagram of the welding port fixing frame with a circular bottom plate is shown. Generally, a semicircular bottom plate 1 can meet the requirements of fixing the welding port, but based on the requirements of various manufacturers, the bottom plate 1 can also be set to a circular shape. Figure 1 and Figure 2 It can be seen that the weld fixing frame with a circular bottom plate only has an avoidance groove 9 added at a position corresponding to the fixed hook on the bottom plate, and a circular hole 10 added at a position corresponding to the boss, and the rest of the structure is the same as the structure with a semicircular bottom plate.

[0042] According to a preferred embodiment, the weld fixing frame further includes an enameled wire through hole 4, such as Figure 1 or Figure 2 As shown. Preferably, the enameled wire through hole 4 is located at the outer edge of the bottom plate 1 and is integrally formed with the bottom plate 1, so that the enameled wire passes through the bottom plate 1 through the enameled wire through hole 4 and is welded to the power line. More preferably, the number of the enameled wire through holes 4 is three, and the three enameled wire through holes 4 are arc-shaped structures, and the positions of the three enameled wire through holes 4 correspond to the positions of the enameled wire outlets, respectively. The enameled wire through hole 4 of the preferred technical solution of this embodiment is used for the enameled wire to pass through the bottom plate 1 and be welded to the power line, and the enameled wire through hole 4 is an arc-shaped structure, preferably a superior arc, so that the enameled wire passing through can be clamped in the through hole.

[0043] According to a preferred embodiment, the welding port fixing frame further includes a power line through hole, which is located on the bottom plate 1 and is integrally formed with the bottom plate 1, so that the power line passes through the bottom plate 1 through the power line through hole and is welded with the enameled wire. Preferably, the power line through hole includes a first power line through hole 5 and a second power line through hole 6. Figure 1 or Figure 2As shown. After the three power lines pass through the first power line through hole 5 on the upper surface of the bottom plate 1, they pass through the second power line through hole 6 on the lower surface of the bottom plate 1 and are welded to the corresponding enameled wires. The power line through hole of the preferred technical solution of this embodiment is used to prevent the welding joint from loosening during the pulling of the power line. After the three power lines pass through the first power line through hole 5 in a top-down manner, they pass through the second power line through hole 6, and after being welded and wrapped with each enameled wire respectively, each welding joint is pressed and fixed on each fixing component 2.

[0044] According to a preferred embodiment, the weld fixing frame further includes a wire clamp, which is located on the bottom plate 1 and is integrally formed with the bottom plate 1, and is used to fix the power cord. The preferred technical solution of this embodiment fixes the power cord by the wire clamp to prevent the longer power cord from moving and hitting the rotor, resulting in poor rotor edge rubbing.

[0045] Preferably, the wire clamp is a slot structure, so as to fix the power cord through the slot structure. Figure 1 or Figure 2 As shown, the wire clamp is a slot structure buckled on the side, and the size of the slot structure opening is smaller than the size at the bottom, so that the power cord passing through can be clamped.

[0046] Preferably, the wire clamp includes a first wire clamp 7 and a second wire clamp 8, and the first wire clamp 7 and the second wire clamp 8 are respectively located between two adjacent fixing components 2. Figure 1 or Figure 2 As shown. More preferably, the first wire clamp 7 is used to fix a power line far from the enameled wire outlet; the second wire clamp 8 is used to fix two power lines close to the enameled wire outlet. After the welding joints of the enameled wire and the power line are pressed and fixed on each fixing component 2, the power line farthest from the enameled wire outlet needs to be fixed through the first wire clamp 7, and the other two power lines can be fixed through the second wire clamp 8 at the same time.

[0047] Another aspect of the present embodiment further provides an external board DC motor. The external board DC motor of the present embodiment includes a solder joint fixing frame of any technical solution of the present embodiment. The external board DC motor of the present embodiment uses a solder joint fixing frame to replace the PCB wiring board in the prior art, which has the advantages of simplifying the production process of the external board DC motor and reducing the production cost of the motor.

[0048] Preferably, the manufacturing process of the external board DC motor of the preferred technical solution of this embodiment is: the DC core is first covered with upper and lower frames, and winding is performed. After winding, the enameled wire is formed into a stator, and the entire weld fixing frame is pressed into the stator by hand, and the fixed bent hook on the stator frame clamps the avoidance groove 9 on the weld fixing frame, and then the power cord is directly welded to the stator enameled wire interface and wrapped, and then the entire weld is pressed into the fixing component 2.

[0049] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A weld fixing frame, characterized in that: It comprises a base plate (1) and a welding port fixing portion, wherein the base plate (1) is fixed on a stator frame, the welding port fixing portion is arranged on the base plate (1), and the welding port fixing portion is used to fix the welding port of the enameled wire and the power line; The bottom plate (1) is provided with a fixing portion, and the fixing portion is used to be connected to the stator frame, so that the bottom plate (1) is fixed to the stator frame through the connection between the fixing portion and the stator frame; The fixing portion comprises an avoidance groove (9) located at the outer edge of the bottom plate (1) and corresponding to the position of the stator frame fixing hook, so as to limit the movement of the bottom plate (1) in the axial direction through the buckling between the avoidance groove (9) and the fixing hook; The fixing portion comprises a circular hole (10) located on the bottom plate (1) and corresponding to the boss of the stator frame, so as to limit the movement of the bottom plate (1) in the radial direction through the engagement between the circular hole (10) and the boss; It also comprises a wire clamp, which is located on the bottom plate (1) and is formed integrally with the bottom plate (1), and is used to fix the power cord; The wire clamp is a slot structure, so as to fix the power wire through the slot structure; The wire clip is a slot structure that is buckled on the side.

2. The weld fixing frame according to claim 1, characterized in that: The welding port fixing portion comprises three fixing components (2), and the positions of the three fixing components (2) respectively correspond to the positions of the enameled wire outlets, so that the welding ports of the three enameled wires and the corresponding power lines are respectively fixed by the three fixing components (2).

3. The weld fixing frame according to claim 2, characterized in that: Each of the fixing components (2) comprises at least one fixing foot (3), and the fixing foot (3) is a slot structure, so as to fix the welding joint between the enameled wire and the power line through the slot structure.

4. The weld fixing frame according to claim 3, characterized in that: Each of the fixing components (2) comprises two fixing legs (3).

5. The weld fixing frame according to claim 1, characterized in that: The bottom plate (1) is made of plastic injection molding or die casting, and the thickness of the bottom plate (1) is 2 to 3 mm.

6. The weld fixing frame according to claim 1, characterized in that: The bottom plate (1) is a semicircular or circular structure.

7. The weld fixing frame according to claim 1, characterized in that: It also includes an enameled wire through hole (4), which is located at the outer edge of the base plate (1) and is integrally formed with the base plate (1), so that the enameled wire can pass through the base plate (1) through the enameled wire through hole (4) and be welded to the power line.

8. The weld fixing frame according to claim 7, characterized in that: The number of the enameled wire through holes (4) is three, and the three enameled wire through holes (4) are arc-shaped structures, and the positions of the three enameled wire through holes (4) respectively correspond to the positions of the enameled wire outlets.

9. The weld fixing frame according to claim 1, characterized in that: It also comprises a power line through hole, which is located on the bottom plate (1) and is formed integrally with the bottom plate (1), so that the power line passes through the bottom plate (1) through the power line through hole and is welded to the enameled wire.

10. The weld fixing frame according to claim 9, characterized in that: The power line through hole comprises a first power line through hole (5) and a second power line through hole (6), and the three power lines are inserted into the first power line through hole (5) through the upper surface of the bottom plate (1), and then passed through the second power line through hole (6) through the lower surface of the bottom plate (1) and welded to the corresponding enameled wire.

11. The weld fixing frame according to claim 1, characterized in that: The wire clamp comprises a first wire clamp (7) and a second wire clamp (8), and the first wire clamp (7) and the second wire clamp (8) are respectively located between two adjacent fixing components (2), wherein: The first wire clamp (7) is used to fix a power wire away from the enameled wire outlet; The second wire clamp (8) is used to fix two power wires close to the enameled wire outlet.

12. An external board DC motor, characterized in that: It comprises the weld fixing frame as claimed in any one of claims 1 to 11.

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