End cap assembly and motor

Abstract

This utility model relates to an end cap assembly and a motor. The end cap assembly includes: an end cap, a motor terminal and a PCBA assembly mounted on the end cap, and a power cord assembly; the end cap includes a first end facing the inside of the motor and a second end facing the outside of the motor, the motor terminal is mounted on the first end and passes through the end cap from the first end to be electrically connected to the power cord assembly at the second end; the end cap has a snap fastener at the second end, the PCBA assembly includes a PCBA board and Hall effect wires soldered to the PCBA board, the PCBA board is fixed to the end cap by the snap fastener; the outer contour of the PCBA board is a symmetrical convex polygon. The end cap assembly of this utility model can reduce soldering processes and optimize PCBA structure, simplify the installation process, reduce PCBA material usage and waste, and save costs.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to an end cap assembly and a motor. Background Technology

[0002] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. Its main function is to generate driving torque, serving as a power source for electrical appliances or various machines. Electric motors are classified into DC motors and AC motors based on the type of current they use.

[0003] A DC motor is a motor that converts direct current into mechanical energy. The structure of a DC motor typically includes a housing with one end open, a stator assembly and a rotor assembly housed inside the housing, and an end cover assembly mounted on the open end of the housing. One end of the rotor assembly extends out of the housing to output mechanical energy. The end cover assembly integrates a PCBA (Printed Circuit Board Assembly) assembly that connects to the controller and power supply.

[0004] In the prior art, the PCBA assembly of a DC motor typically includes a PCBA board, power lines, and Hall effect wires. The power lines and Hall effect wires are usually directly soldered onto the PCBA board, which is then fixed to the motor end cover by solder points or screws. Furthermore, the PCBA board also needs to be soldered to the motor terminals to achieve electrical connection between the power lines and the motor terminals. These types of PCBA components have the following problems: 1. Since the power lines are directly soldered to the PCBA board, the quality requirements for the solder joints are high. Furthermore, the insulation of the power lines shrinks due to heat during soldering, easily exposing the wire core and posing a short circuit risk. 2. The wire bonding process is quite delicate, with high requirements for soldering time, temperature, and location. For example, insufficient soldering time can lead to cold solder joints, thus requiring a high level of operator skill. 3. When defective products require rework, the solder joints must be completely removed before the PCBA board can be removed, making the operation complex. 4. Using screws to fix the PCBA board increases process and material costs. Moreover, self-tapping screws are typically used for installation; if disassembly is required, the end caps will have already suffered irreversible damage, making them unusable and increasing the scrap rate. Additionally, see [link to relevant documentation]. Figure 1The diagram shows the layout of a PCBA board in the prior art. In the prior art, the PCBA board 131' needs to be equipped with solder points 1311' for soldering Hall lines, solder points 1312' for fixing PCBA components to the end cover, and solder points 1313' for soldering power lines to the PCBA board. In addition, a certain amount of space needs to be left between each solder point to avoid short circuits. Therefore, the area required for the PCBA board 131' is relatively large. Since the motor end cover is usually circular, the PCBA board 131' in the prior art is usually designed to be circular to obtain a larger area. However, during the layout of the PCBA board, there is a lot of wasted area between the circles, resulting in a lot of scrap material and material waste.

[0005] Therefore, there is an urgent need to design an end cap assembly structure that can reduce soldering processes, optimize PCBA structure, and simplify the installation process. Summary of the Invention

[0006] Therefore, the purpose of this utility model is to provide an end cap assembly that can reduce soldering processes, optimize PCBA structure, simplify installation process, reduce PCBA material usage and waste, and save costs.

[0007] The purpose of this utility model is also to provide a motor whose end cover assembly structure can reduce soldering processes and optimize PCBA structure, simplify installation process, reduce PCBA material usage and waste, and save costs.

[0008] To achieve the above objectives, this utility model provides an end cap assembly, comprising: an end cap, a motor terminal and a PCBA assembly mounted on the end cap, and a power cord assembly; the end cap includes a first end facing the inside of the motor and a second end facing the outside of the motor, the motor terminal is mounted on the first end and passes through the end cap from the first end to be electrically connected to the power cord assembly at the second end; the end cap is provided with a buckle at the second end, the PCBA assembly includes a PCBA board and Hall effect wires soldered to the PCBA board, the PCBA board is fixed to the end cap by the buckle; the outer contour of the PCBA board is a symmetrical convex polygon.

[0009] The buckle includes a fixed buckle and a movable buckle.

[0010] The outer contour of the PCBA board is an axially symmetric hexagon formed by a pair of parallel long sides and short sides, a pair of side sides extending perpendicularly from the long sides to the short sides, and a pair of hypotenuses connecting the side sides and the short sides.

[0011] The long side is installed in conjunction with the fixed buckle, and the short side is installed in conjunction with the movable buckle.

[0012] The number of fixed buckles is 2, and the number of movable buckles is 1.

[0013] The end cap assembly also includes a sensing magnetic ring, which is installed between the end cap and the PCBA assembly.

[0014] This utility model also provides an electric motor, including a housing with one open end, an end cover assembly installed at the open end of the housing, and a stator assembly and a rotor assembly disposed within the housing. One end of the rotor assembly extends out of the housing to output mechanical energy. The end cover assembly comprises: an end cover, motor terminals and a PCBA assembly installed on the end cover, and a power cord assembly. The end cover includes a first end facing the inside of the motor and a second end facing the outside of the motor. The motor terminals are installed at the first end, pass through the end cover from the first end, and are electrically connected to the power cord assembly at the second end. The end cover has a snap fastener at the second end. The PCBA assembly includes a PCBA board and Hall effect wires soldered onto the PCBA board. The PCBA board is fixed to the end cover by the snap fastener. The outer contour of the PCBA board is a symmetrical convex polygon.

[0015] The buckle includes a fixed buckle and a movable buckle.

[0016] The outer contour of the PCBA board is an axially symmetric hexagon formed by a pair of parallel long sides and short sides, a pair of side sides extending perpendicularly from the long sides to the short sides, and a pair of hypotenuses connecting the side sides and the short sides.

[0017] The long side is installed in conjunction with the fixed buckle, and the short side is installed in conjunction with the movable buckle.

[0018] The buckle includes two fixed buckles and one movable buckle.

[0019] The end cap assembly also includes a sensing magnetic ring, which is installed between the end cap and the PCBA assembly.

[0020] The beneficial effects of this utility model are as follows: The end cap assembly and motor of this utility model use a buckle on the end cap to fix the PCBA assembly instead of soldering, reducing the soldering process, avoiding damage to other components due to the high temperature during soldering, reducing process complexity, enabling rapid disassembly of the PCBA assembly without causing irreversible damage, and allowing the components to be reused, reducing waste; the PCBA board of this utility model reduces the number of solder points used to fix the PCBA assembly to the end cap, reduces the space required to integrate power lines on the PCBA board, and the area of ​​the PCBA board can be made smaller, reducing material usage and saving costs. Furthermore, this utility model adopts a symmetrical convex polygon design, which allows for more compact arrangement of symmetrical convex polygons during material layout, reducing substrate area waste and thus reducing material waste. Attached Figure Description

[0021] The technical solution and other beneficial effects of this utility model will become apparent from the following detailed description of specific embodiments, in conjunction with the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of PCBA board layout in the existing technology;

[0023] Figure 2 This is an exploded view of an end cap assembly according to an embodiment of the present invention;

[0024] Figure 3 for Figure 2 A three-dimensional schematic diagram of the end cap assembly;

[0025] Figure 4 for Figure 2 Another perspective view of the end cap assembly;

[0026] Figure 5 for Figure 2 A cross-sectional schematic diagram of the end cap assembly;

[0027] Figure 6 for Figure 2 A front view of the second end of the end cap assembly;

[0028] Figure 7 This is a schematic diagram of the PCBA board layout in this application;

[0029] Figure 8 This is a three-dimensional schematic diagram of a motor according to an embodiment of the present utility model;

[0030] Figure 9 for Figure 8 A 3D schematic diagram of the motor without the end cover assembly installed;

[0031] Figure 10 for Figure 8 A partial cross-sectional schematic diagram of the motor;

[0032] Figure 11 for Figure 8 A flowchart of the motor assembly PCBA board assembly;

[0033] Figure 12 for Figure 11 A partial cross-sectional schematic diagram. Detailed Implementation

[0034] To further illustrate the technical means and effects of this utility model, the following detailed description is provided in conjunction with the preferred embodiments of this utility model and their accompanying drawings.

[0035] See Figure 2-6This utility model provides an end cap assembly 1, including: an end cap 11, a motor terminal 12 and a PCBA assembly 13 mounted on the end cap 11, and a power cord assembly 14; the end cap 11 includes a first end 112 facing the inside of the motor and a second end 113 facing the outside of the motor, the motor terminal 12 is mounted on the first end 112 and passes through the end cap 11 from the first end 112 and is electrically connected to the power cord assembly 14 at the second end 113; the end cap 11 is provided with a buckle 111 at the second end 113, the PCBA assembly 13 includes a PCBA board 131 and Hall wires 132 soldered on the PCBA board 131, the PCBA board 131 is fixed to the end cap 11 by the buckle 111; the outer contour of the PCBA board 131 is a symmetrical convex polygon.

[0036] When assembling the end cover assembly 1 of this utility model, the components installed at the first end 112, such as the motor terminal 12, are first installed on the end cover 11, and the Hall wire 132 is soldered on the PCBA board 131 to obtain the PCBA assembly 13. Then, the PCBA assembly 13 and the power cord assembly 14 are installed on the second end 113 of the end cover 11.

[0037] See Figure 1 and Figure 7 , Figure 1 This is a schematic diagram of PCBA board layout in the existing technology. Figure 7 This is a schematic diagram of the PCBA board layout of this application. Compared with the prior art, the PCBA board 131 of this application only needs to be provided with solder points 1311 for soldering Hall lines. Furthermore, this utility model adopts a convex polygon design with a symmetrical outer contour. During layout, the convex polygons can be arranged by inlay.

[0038] In summary, the end cap assembly of this utility model reduces soldering steps by using clips to fix PCBA components on the end cap instead of soldering, thus avoiding damage to other components due to the high temperatures during soldering, reducing process complexity, enabling rapid disassembly of PCBA components without causing irreversible damage, allowing components to be reused, and reducing waste. The PCBA board of this utility model reduces the number of solder points used to fix PCBA components to the end cap, reduces the space required to integrate power lines on the PCBA board, and allows for a smaller PCBA board area, reducing material usage and saving costs. Furthermore, the utility model adopts a symmetrical convex polygon design, allowing for more compact arrangement of symmetrical convex polygons during material layout, reducing substrate area waste and thus reducing material waste.

[0039] Preferably, the motor terminal 12 includes a insert 121. The motor terminal 12 extends from the first end 112 through the end cover 11 and then protrudes from the insert 121 at the second end 113. The power cord assembly 14 includes a quick-connect terminal 141. The power cord assembly 14 achieves electrical connection and fixation with the motor terminal 12 through the insertion of the quick-connect terminal 141 and the insert 121. The power cord of this invention is not integrated into the PCBA assembly, but is connected to the motor terminal through a quick-connect structure. This eliminates the need for soldering, reducing the risk of short circuits caused by exposed wire cores due to heat shrinkage of the insulation.

[0040] Preferably, the quick-connect terminal 141 is a cold-pressed quick-connect terminal.

[0041] Preferably, the buckle 111 includes a fixed buckle 1111 and a movable buckle 1112. (See reference...) Figure 11-12 When the PCBA assembly 13 is installed onto the end cap 11, first, one end of the PCBA board 131 is tilted and fastened into the fixing clip 1111. Then, the movable clip 1112 is pulled outward while pressing down on the PCBA board 131 until the PCBA board 131 is flat. After that, the movable clip 1112 is released, and the movable clip 1112 engages with the edge of the PCBA board 131, thus fixing the PCBA assembly 13. When it is necessary to disassemble the PCBA assembly 13, simply pull the movable clip 1112 outward, lift one end of the PCBA board 131, and remove the PCBA assembly 13. This utility model, through the cooperation of the fixing clip and the movable clip, enables convenient installation and disassembly of the PCBA assembly.

[0042] Preferably, as shown in the appendix Figure 2-6 In the preferred embodiment, the outer contour of the PCBA board 131 is an axisymmetric hexagon formed by a pair of parallel long sides 1312 and short sides 1313, a pair of side sides 1314 extending perpendicularly from the long sides 1312 to the short sides 1313, and a pair of hypotenuses 1315 connecting the side sides 1314 and the short sides 1313. (See reference) Figure 7 The PCBA outline shape of this invention enables more compact material layout, reducing substrate area waste and thus reducing material waste. (Reference) Figure 6 In this preferred embodiment, the power cord assembly 14 is disposed between the inclined side 1315 of the PCBA board 131 and the end cap 11, so as to make the most compact use of the surface area of ​​the end cap 11.

[0043] Optionally, the long side 1312 is installed in conjunction with the fixed buckle 1111, and the short side 1313 is installed in conjunction with the movable buckle 1112.

[0044] Preferably, the buckle 111 includes two fixed buckles 1111 and one movable buckle 1112.

[0045] Furthermore, the end cap assembly 1 of this utility model also includes a sensing magnetic ring 15, which is installed between the end cap 11 and the PCBA assembly 13.

[0046] See Figure 2-10 This utility model also provides a motor, comprising a housing 2 with one open end, an end cover assembly 1 installed at the open end of the housing 2, and a stator assembly 3 and a rotor assembly 4 disposed within the housing 2. One end of the rotor assembly 4 is connected to the end cover assembly 1, and the other end extends out of the housing 2 to output mechanical energy. The end cover assembly 1 includes: an end cover 11, motor terminals 12 and PCBA assembly 13 installed on the end cover 11, and a power cord assembly 14. The end cover 11 includes a first end 112 facing the inside of the motor and a second end 112 facing the outside of the motor. 13. The motor terminal 12 is installed at the first end 112 and passes through the end cover 11 from the first end 112 to the second end 113 and is electrically connected to the power cord assembly 14. The end cover 11 is provided with a buckle 111 at the second end 113. The PCBA assembly 13 includes a PCBA board 131 and Hall wires 132 soldered on the PCBA board 131. The PCBA board 131 is fixed to the end cover 11 by the buckle 111. The outer contour of the PCBA board 131 is a symmetrical convex polygon.

[0047] The motor end cover assembly of this utility model uses a snap-fit ​​design on the end cover to fix the PCBA assembly instead of soldering, reducing the soldering process, preventing damage to other components due to the high temperature during soldering, reducing process complexity, enabling quick disassembly of the PCBA assembly without causing irreversible damage, and allowing the components to be reused, reducing waste. The PCBA board of this utility model reduces the number of solder points used to fix the PCBA assembly to the end cover, reduces the space required to integrate power lines on the PCBA board, and allows the PCBA board area to be made smaller, reducing material usage and saving costs. Furthermore, this utility model adopts a symmetrical convex polygon design, which allows for more compact arrangement of symmetrical convex polygons during material layout, reducing substrate area waste and thus reducing material waste.

[0048] See Figure 11-12 When assembling the motor of this utility model, the components installed at the first end 112, such as the motor terminal 12, are first installed on the end cover 11. The Hall wire 132 is soldered onto the PCBA board 131 to obtain the PCBA assembly 13. Then, the end cover 11 is installed on the housing 2. Finally, the PCBA assembly 13 and the power cord assembly 14 are installed on the second end 113 of the end cover 11 to complete the motor installation.

[0049] Preferably, the motor terminal 12 includes a insert 121. The motor terminal 12 extends from the first end 112 through the end cover 11 and then protrudes from the insert 121 at the second end 113. The power cord assembly 14 includes a quick-connect terminal 141. The power cord assembly 14 achieves electrical connection and fixation with the motor terminal 12 through the insertion of the quick-connect terminal 141 and the insert 121. The power cord of this invention is not integrated into the PCBA assembly, but is connected to the motor terminal through a quick-connect structure. This eliminates the need for soldering, reducing the risk of short circuits caused by exposed wire cores due to heat shrinkage of the insulation.

[0050] Preferably, the buckle 111 includes a fixed buckle 1111 and a movable buckle 1112.

[0051] Preferably, as shown in the appendix Figure 2-12 In the preferred embodiment, the outer contour of the PCBA board 131 is an axisymmetric hexagon formed by a pair of parallel long sides 1312 and short sides 1313, a pair of side sides 1314 extending perpendicularly from the long sides 1312 to the short sides 1313, and a pair of hypotenuses 1315 connecting the side sides 1314 and the short sides 1313. (See reference) Figure 7 The PCBA outline shape of this utility model enables more compact material layout, reduces substrate area waste, and thus reduces material waste.

[0052] Optionally, the long side 1312 is fitted with the fixed buckle 1111, and the short side 1313 is fitted with the movable buckle 1112. (See attached diagram) Figure 6 , 11 -12, In this embodiment, the end cap 11 has a circular outline, the long side 1312 is fixed in the middle of the circle, the short side 1313 is fixed in the edge of the circle, and the power cord assembly 14 is disposed between the inclined side 1315 of the PCBA board 131 and the end cap 11, so as to make the most compact use of the surface area of ​​the end cap 11.

[0053] Preferably, the buckle 111 includes two fixed buckles 1111 and one movable buckle 1112. (See attached diagram) Figure 6 In this embodiment, two fixing buckles 1111 are symmetrically arranged at both ends of the long side 1312.

[0054] Furthermore, the end cap assembly 1 of this utility model also includes an induction magnetic ring 15, which is installed between the end cap 11 and the PCBA assembly 13. One end of the rotor assembly 4 extends out of the housing 2 to output mechanical energy, and the other end passes through the end cap 11 and is connected to the induction magnetic ring 15.

[0055] The end cap assembly structure of this utility model is applicable to brushed motors, but is not limited to brushed motors.

[0056] In summary, the end cap assembly and motor of this utility model, by setting a buckle on the end cap to fix the PCBA assembly instead of soldering, reduce the soldering process, avoid damage to other components due to the high temperature during soldering, reduce process complexity, enable quick disassembly of PCBA assembly without causing irreversible damage, and allow the components to be reused, reducing waste. The PCBA board of this utility model reduces the solder points used to fix the PCBA assembly to the end cap, reduces the space required to integrate power lines on the PCBA board, and the area of ​​the PCBA board can be made smaller, which can reduce material usage and save costs. Furthermore, this utility model adopts a symmetrical convex polygon design, and the symmetrical convex polygons can be interlocked during material arrangement, making the arrangement more compact and reducing substrate area waste, thereby reducing material waste.

[0057] As described above, those skilled in the art can make various other corresponding changes and modifications based on the technical solution and concept of this utility model, and all such changes and modifications should fall within the protection scope of the appended claims of this utility model.

Claims

1. An end cap assembly (1) characterised in that, include: The end cover (11), motor terminals (12) mounted on the end cover (11), PCBA assembly (13), and power cord assembly (14) are provided. The end cover (11) includes a first end (112) facing the inside of the motor and a second end (113) facing the outside of the motor. The motor terminals (12) are mounted on the first end (112) and pass through the end cover (11) from the first end (112) and are electrically connected to the power cord assembly (14) at the second end (113). The end cover (11) is provided with a buckle (111) at the second end (113). The PCBA assembly (13) includes a PCBA board (131) and Hall wires (132) soldered on the PCBA board (131). The PCBA board (131) is fixed on the end cover (11) by the buckle (111). The outer contour of the PCBA board (131) is a symmetrical convex polygon.

2. The end cap assembly (1) as claimed in claim 1, characterized in that, The buckle (111) includes a fixed buckle (1111) and a movable buckle (1112).

3. An end cap assembly (1) as claimed in claim 2, characterised in that, The outer contour of the PCBA board (131) is an axisymmetric hexagon formed by a pair of parallel long sides (1312) and short sides (1313), a pair of side sides (1314) extending perpendicularly from the long side (1312) to the short side (1313), and a pair of hypotenuses (1315) connecting the side sides (1314) and the short side (1313).

4. An end cap assembly (1) as claimed in claim 3, characterised in that, The long side (1312) is installed in conjunction with the fixed buckle (1111), and the short side (1313) is installed in conjunction with the movable buckle (1112); there are 2 fixed buckles (1111) and 1 movable buckle (1112).

5. An end cap assembly (1) as claimed in claim 1, characterized in that The end cap assembly (1) further includes a sensing magnetic ring (15), which is installed between the end cap (11) and the PCBA assembly (13).

6. An electric machine comprising a housing (2) having an open end, an end cap assembly (1) mounted to the open end of the housing (2), and a stator assembly (3) and a rotor assembly (4) disposed within the housing (2), the rotor assembly (4) extending out of the housing (2) at one end to output mechanical energy; characterized by, The end cap assembly (1) includes: an end cap (11), a motor terminal (12) mounted on the end cap (11), a PCBA assembly (13), and a power cord assembly (14); the end cap (11) includes a first end (112) facing the inside of the motor and a second end (113) facing the outside of the motor, the motor terminal (12) is mounted on the first end (112) and passes through the end cap (11) from the first end (112) and is electrically connected to the power cord assembly (14) at the second end (113); the end cap (11) is provided with a buckle (111) at the second end (113), the PCBA assembly (13) includes a PCBA board (131) and Hall wires (132) soldered on the PCBA board (131), the PCBA board (131) is fixed on the end cap (11) by the buckle (111); the outer contour of the PCBA board (131) is a symmetrical convex polygon.

7. The electric machine of claim 6, wherein, The buckle (111) includes a fixed buckle (1111) and a movable buckle (1112).

8. The electric machine of claim 7, wherein, The outer contour of the PCBA board (131) is an axisymmetric hexagon formed by a pair of parallel long sides (1312) and short sides (1313), a pair of side sides (1314) extending perpendicularly from the long side (1312) to the short side (1313), and a pair of hypotenuses (1315) connecting the side sides (1314) and the short side (1313).

9. The electric machine of claim 8, wherein, The long side (1312) is installed in conjunction with the fixed buckle (1111), and the short side (1313) is installed in conjunction with the movable buckle (1112). The buckle (111) includes two fixed buckles (1111) and one movable buckle (1112).

10. The electric machine of claim 6, wherein, The end cap assembly (1) further includes a sensing magnetic ring (15), which is installed between the end cap (11) and the PCBA assembly (13).

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