Piercing type connecting structure of stator enameled wire and connecting method thereof
By twisting the lead wire core into a twisted shape, and connecting the lead wire and enameled wire to the puncture terminals in groups, the problems of poor connection of enameled wires and various puncture terminals in the prior art are solved, and efficient and stable electrical connections and production efficiency are achieved.
Patent Information
- Application Number
- CN202411816850.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-03-25
AI Technical Summary
In the prior art, when the enameled wire is connected in a puncture type, it is easy to cause poor connection due to loose wire cores or multiple wires clamped together. The cross-sectional area of the wrapping wires of different motors varies greatly, and multiple puncture terminals are required, resulting in limited production and application.
By twisting the lead wire core into a twisted shape along the circumferential direction, and grouping the lead wires and enameled wires, each group is connected to a puncture terminal, conducting electricity using a conductive connection block, and at the same time, adapting to wires of different sizes by inverted enameled wires or wire cores of the lead wires as compensation fill lines.
The electrical connection quality of the enameled wire is improved, the poor connection is avoided, the application range is expanded, the number of required puncture terminal crimping machines is reduced, and the production efficiency is improved.
Smart Images
Figure CN119695533A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of motors, and in particular to a piercing connection structure of a stator enameled wire and a connection method thereof. Background Art
[0002] At present, the use of piercing terminals to achieve electrical connection of the enameled wire of the motor stator is a relatively mature technology. This technology uses sharp thorns to pierce the paint coating of the enameled wire to achieve electrical connection. There is no need for a separate process to remove the paint coating, and the production process is simple.
[0003] However, this connection method is subject to the following limitations, which restricts its application scope.
[0004] 1. The core of the power cord is loose after the insulation layer is stripped off, and the enameled wire is easily wrapped in the middle of the core, resulting in the insulation layer cannot be pierced, causing poor connection.
[0005] 2. A piercing terminal can generally only pierce three enameled wires. If a piercing terminal can pierce more than three enameled wires, some enameled wires will be sandwiched in the middle, resulting in the risk of failure to pierce the paint and achieve electrical connection. The application of this terminal is limited for motors with multiple wires wound in parallel.
[0006] 3. There are upper and lower limits on the cross-sectional area of the enameled wire or power cord that a piercing terminal is suitable for. When the cross-sectional area of the wire wrapped in a motor varies greatly, piercing terminals of different sizes are required for connection. When a motor is wired and produced at the same time, multiple piercing terminal crimping machines are required for wiring, which greatly restricts production applications.
[0007] The present invention is made based on the above situation. Summary of the invention
[0008] The present invention overcomes the shortcomings of the prior art and provides a piercing connection structure of a stator enameled wire and a connection method thereof which can improve the quality and efficiency of the electrical connection of the enameled wire.
[0009] The present invention is achieved through the following technical solutions:
[0010] A piercing connection structure for stator enameled wires, comprising a conductive terminal strip and a wire group, wherein the wire group consists of a lead wire core and an enameled wire or a plurality of enameled wires, the terminal strip consists of at least one piercing terminal, the piercing terminal comprises a clamping portion, and the inner side wall of the clamping portion is provided with piercing teeth for piercing the insulating layer of the enameled wire; the number of wire groups is the same as the number of piercing terminals in the terminal strip, when the number of wire groups is 1, the terminal strip consists of one piercing terminal, and the piercing terminal clamps the wire group; when the number of wire groups is greater than or equal to 2, two adjacent piercing terminals are connected by a conductive connecting block, and each piercing terminal clamps a group of wire groups respectively.
[0011] In the stator enameled wire piercing connection structure as described above, the lead wire core is twisted into a twist shape along the circumferential direction, and the number of enameled wires in the wire group is less than or equal to three.
[0012] In the stator enameled wire piercing connection structure as described above, the connection end of one or more enameled wires in the wire group is provided with a first folded portion, and the piercing terminal clamps the wire group connection end and the first folded portion.
[0013] In the stator enameled wire piercing connection structure as described above, the lead wire core connection end in the wire group is provided with a second folded portion, and the piercing terminal clamps the lead wire core connection end, the second folded portion and the enameled wire connection end.
[0014] A connection method for the above-mentioned stator enameled wire piercing connection structure, the specific steps are as follows:
[0015] S1. When the lead wire has only one core, directly proceed to step S2 for processing; when the lead wire has two or more cores, twist the cores of the lead wire into a twist shape along the circumferential direction, and then proceed to step S2 for processing;
[0016] S2. When the total number of enameled wires is not more than three, directly proceed to step S3 for processing; when the total number of enameled wires is more than three, directly proceed to step S4 for processing;
[0017] S3, placing the connecting end of the wire group into the inner side of the clamping part, curling the clamping part inwards by the piercing terminal crimping machine, piercing the insulating layer of the enameled wire to connect with the conductive core of the enameled wire, and the side knife of the piercing terminal crimping machine cuts off the conductive connection block between the piercing terminal and the adjacent piercing terminal;
[0018] S4. Group the lead wires and enameled wires. The number of groups is the total number of enameled wires divided by three. When the calculated result is not an integer, round up. Put the connecting end of the first group into the inner side of the first piercing terminal at the output end of the terminal strip. Use the piercing terminal crimping machine to make the clamping part curl inwards, and the piercing teeth pierce the insulation layer of the enameled wire of this group. Put the connecting end of the next group into the inner side of the next piercing terminal. Use the piercing terminal crimping machine to make the clamping part curl inwards, and the piercing teeth pierce the insulation layer of the enameled wire of this group, until the enameled wire of the last group is pierced and connected by the piercing terminal. The side knife of the piercing terminal crimping machine cuts off the conductive connecting block between the piercing terminal and the next piercing terminal.
[0019] In the connection method of the stator enameled wire piercing connection structure as described above, when in step S2, the sum of the cross-sectional areas of the lead wire core and the enameled wire is less than a preset value, the connection ends of one or more of the enameled wires are folded back, and then the process proceeds to step 3.
[0020] In the connection method of the stator enameled wire piercing connection structure as described above, when in step S2, the sum of the cross-sectional areas of the lead wire core and the enameled wire is less than a preset value, the lead wire core is folded back and twisted into a twist shape along the circumferential direction, and then the process proceeds to step 3.
[0021] In the connection method of the stator enameled wire piercing connection structure as described above, the piercing terminal and the conductive connection block are an integrated structure.
[0022] In the connection method of the stator enameled wire piercing connection structure as described above, the piercing teeth are formed by drawing or stamping.
[0023] In the connection method of the stator enameled wire piercing connection structure as described above, the lead wire includes a power line.
[0024] Compared with the prior art, the present invention has the following advantages:
[0025] In this case, before the piercing terminal is crimped, the wire core of the lead wire is twisted into a twist shape in the circumferential direction, thereby avoiding the enameled wire being wrapped in the wire core during the piercing terminal crimping, resulting in poor connection of the enameled wire.
[0026] The lead wires and enameled wires are grouped, and each group of lead wires and enameled wires are connected to a piercing terminal respectively. The lead wires and enameled wires between different groups are conductively connected through conductive connecting blocks, which solves the problem that the piercing terminal cannot connect more than three enameled wires, thereby improving production efficiency and expanding the scope of application.
[0027] In this case, the core of the enameled wire or lead wire is folded back to act as a compensating filling wire, thereby changing the cross-sectional area of the wire wrapped in the piercing terminal, so that wires of different sizes can adapt to a piercing terminal of one specification, avoiding the problem of using multiple piercing terminals for one motor, reducing the number of piercing terminal crimping machines required, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:
[0029] Figure 1 It is a schematic diagram of the structure of the terminal material strip in the present invention;
[0030] Figure 2 It is a schematic diagram of the connection between the lead wire core and a single enameled wire in the present invention;
[0031] Figure 3 It is a schematic diagram of the grouped connection of the lead wire core and the enameled wire in the present invention;
[0032] Figure 4 This is a schematic diagram of the enameled wire being folded back for connection in the present invention;
[0033] Figure 5 It is a schematic diagram of the lead wire core being folded back and twisted into a twist shape in the present invention. DETAILED DESCRIPTION
[0034] The present invention will be further described below in conjunction with the accompanying drawings:
[0035] like Figures 1 to 5 A piercing connection structure of a stator enameled wire is shown, comprising a conductive terminal strip 1 and a wire group, wherein the wire group is composed of a lead wire core 20 and an enameled wire 30 or a plurality of enameled wires, the terminal strip 1 is composed of at least one piercing terminal 11, the piercing terminal 11 comprises a clamping portion 111, and the inner side wall of the clamping portion 111 is provided with piercing teeth 112 for piercing the insulating layer of the enameled wire 30; the number of wire groups is the same as the number of piercing terminals 11 in the terminal strip 1, when the number of wire groups is 1, the terminal strip 1 is composed of one piercing terminal 11, and the piercing terminal 11 clamps the wire group; when the number of wire groups is greater than or equal to 2, two adjacent piercing terminals 11 are connected by a conductive connecting block 12, and each piercing terminal 11 clamps a group of wire groups respectively.
[0036] The lead wires and enameled wires 30 are grouped, and each group of lead wires and enameled wires 30 is connected to a piercing terminal 11 respectively. The lead wires and enameled wires 30 between different groups are conductively connected through the conductive connecting block 12, which solves the problem that the piercing terminal 11 cannot connect more than three enameled wires 30, thereby improving production efficiency and expanding the scope of application.
[0037] In one embodiment, the lead wire core 20 is twisted into a twist shape along the circumferential direction, and the number of enameled wires 30 in the wire group is less than or equal to three. The lead wire core 20 is twisted into a twist shape along the circumferential direction, thereby avoiding the enameled wire 30 being wrapped in the wire core 20 when the terminal 11 is crimped and pierced, resulting in a poor connection of the enameled wire 30.
[0038] In one embodiment, the connection end of one or more enameled wires 30 in the wire group is provided with a first inflection portion 300, and the piercing terminal 11 clamps the connection end of the wire group and the first inflection portion 300. The first inflection portion 300 acts as a compensating filling wire, which changes the cross-sectional area of the wire wrapped in the piercing terminal 11, so that wires of different sizes can adapt to a piercing terminal 11 of one specification, avoiding the problem that one motor needs to use piercing terminals of multiple specifications, reducing the number of piercing terminal crimping machines required, and improving production efficiency.
[0039] In one embodiment, the connection end of the lead wire core 20 in the wire group is provided with a second inflected portion 200, and the piercing terminal 11 clamps the connection end of the lead wire core 20, the second inflected portion 200, and the connection end of the enameled wire 30. The second inflected portion 200 acts as a compensating filling wire, changing the cross-sectional area of the wire wrapped in the piercing terminal 11, so that wires of different sizes can adapt to a piercing terminal 11 of one specification, avoiding the problem that one motor needs to use piercing terminals of multiple specifications, reducing the number of piercing terminal crimping machines required, and improving production efficiency.
[0040] A connection method of the above-mentioned stator enameled wire piercing connection structure, the specific steps are as follows:
[0041] S1, when the lead wire has only one wire core 20, directly proceed to step S2 for processing; when the lead wire has two or more wire cores 20, twist the wire core 20 of the lead wire into a twist shape along the circumferential direction, so as to avoid the enameled wire 30 being wrapped in the wire core 20 during the puncture of the terminal crimping, resulting in poor connection of the enameled wire 30, and then proceed to step S2 for processing;
[0042] S2. When the total number of the enameled wires 30 is not more than three, directly proceed to step S3 for processing; when the total number of the enameled wires 30 is more than three, directly proceed to step S4 for processing;
[0043] S3, put the wire group connection end into the inner side of the clamping part 111, and use the piercing terminal crimping machine to make the clamping part 111 curl inward, so that the piercing teeth 112 pierce the insulation layer of the enameled wire 30 to connect with the conductive core of the enameled wire 30, and the side knife of the piercing terminal crimping machine cuts off the conductive connection block 12 between the piercing terminal 11 and the adjacent piercing terminal 11;
[0044] S4. Group the lead wires and the enameled wires 30. The grouping mentioned here does not mean separating the lead wires and the enameled wires 30, but putting the lead wires and the enameled wires 30 together and then grouping them according to the total number. The number of groups is the total number of the enameled wires 30 divided by three. When the calculated result is not an integer, round up. Put the connecting end of the first group into the inner side of the first piercing terminal 11 at the output end of the terminal strip 1, and use the piercing terminal crimping machine to make the clamping part 111 curl inward, and the piercing teeth 112 pierce the insulation layer of the group of enameled wires 30. Put the connecting end of the next group into the inner side of the next piercing terminal 11, and use the piercing terminal crimping machine to make the clamping part 111 curl inward, and the piercing teeth 112 pierce the insulation layer of the group of enameled wires 30, until the last group of enameled wires 30 are pierced and connected by the piercing terminal 11, and the side knife of the piercing terminal crimping machine cuts off the conductive connecting block 12 between the piercing terminal 11 and the next piercing terminal 11.
[0045] The lead wire core 20 is the bare wire core 20 after the insulation layer of the lead wire connection end is stripped off.
[0046] In this case, the lead wires and enameled wires 30 are grouped, and each group of lead wires and enameled wires 30 is connected to a piercing terminal 11 respectively. The lead wires and enameled wires 30 between different groups are electrically conductive through the conductive connecting block 12, thereby solving the problem that the piercing terminal 11 cannot connect more than three enameled wires 30, thereby improving production efficiency and expanding the scope of application.
[0047] In one embodiment, the above-mentioned piercing terminal crimping machine can be an APT-5A terminal crimping machine or an APT-5E terminal crimping machine, and of course it can also be other types of terminal crimping machines.
[0048] Specifically, the piercing terminal 11 and the conductive connecting block 12 are an integrated structure. The terminal strip 1 is made of a whole strip of conductive material, and the piercing teeth 112 are made by drawing or stamping.
[0049] In some embodiments, when the sum of the cross-sectional areas of the lead wire core 20 and the enameled wire 30 is less than a preset value in step S2, the connecting ends of one or more enameled wires 30 are folded back, and then the process proceeds to step 3. The sum of the cross-sectional areas mentioned here should be understood as the cross-sectional area of a single enameled wire 30 multiplied by the number of enameled wires 30 plus the cross-sectional area of the lead wire core 20. The preset value mentioned here is determined by the size of the piercing terminal 11, and it should be ensured that the piercing terminal 11 can compress the lead wire core 20 and the enameled wire 30 after being rolled inward.
[0050] In the present case, one or more enameled wires 30 are folded back to act as compensating filling wires, thereby changing the cross-sectional area of the wire wrapped in the piercing terminal 11, so that wires of different sizes can adapt to one specification of piercing terminal 11, avoiding the problem of one motor needing to use piercing terminals of various specifications, reducing the number of piercing terminal crimping machines required, and improving production efficiency.
[0051] In some embodiments, when the sum of the cross-sectional areas of the lead wire core 20 and the enameled wire 30 is less than a preset value in step S2, the lead wire core 20 is folded back and twisted into a twist shape along the circumferential direction, and then step 3 is entered. The sum of the cross-sectional areas mentioned here should be understood as the cross-sectional area of a single enameled wire 30 multiplied by the number of enameled wires 30 plus the cross-sectional area of the lead wire core 20. The preset value mentioned here is determined by the size of the piercing terminal 11, and it should be ensured that the piercing terminal 11 can compress the lead wire core 20 and the enameled wire 30 after being rolled inward. The lead wire core 20 is folded back only when the length of the exposed wire core 20 after the insulation layer of the lead wire connection end is stripped is greater than twice the length of the piercing terminal 11. By folding the lead wire core 20 to act as a compensating filling wire, the cross-sectional area of the wire wrapped in the piercing terminal 11 is changed, so that wires of different sizes can adapt to one specification of piercing terminal 11, avoiding the problem of one motor needing to use piercing terminals of multiple specifications, reducing the number of piercing terminal crimping machines required, and improving production efficiency.
[0052] In one embodiment, the lead wire may be a power wire or other conductive wires.
Claims
1. A puncture connection structure for stator enameled wire, characterized in that: The invention comprises a conductive terminal strip (1) and a wire group, wherein the wire group is composed of a lead wire core (20) and an enameled wire (30) or a plurality of enameled wires, wherein the terminal strip (1) is composed of at least one piercing terminal (11), wherein the piercing terminal (11) comprises a clamping portion (111), and the inner side wall of the clamping portion (111) is provided with piercing teeth (112) for piercing the insulating layer of the enameled wire (30); the number of wire groups is the same as the number of piercing terminals (11) in the terminal strip (1), and when the number of wire groups is 1, the terminal strip (1) is composed of one piercing terminal (11), and the piercing terminal (11) clamps the wire group; when the number of wire groups is greater than or equal to 2, two adjacent piercing terminals (11) are connected via a conductive connecting block (12), and each piercing terminal (11) clamps a group of wire groups.
2. The stator enameled wire piercing connection structure according to claim 1, characterized in that: The lead wire core (20) is twisted into a twist shape along the circumferential direction, and the number of enameled wires (30) in the wire group is less than or equal to three.
3. The stator enameled wire piercing connection structure according to claim 1, characterized in that: The connection end of one or more enameled wires (30) in the wire group is provided with a first folded portion (300), and the piercing terminal (11) clamps the connection end of the wire group and the first folded portion (300).
4. The stator enameled wire piercing connection structure according to claim 1, characterized in that: The connection end of the lead wire core (20) in the wire group is provided with a second folded portion (200), and the piercing terminal (11) clamps the connection end of the lead wire core (20), the second folded portion (200) and the connection end of the enameled wire (30).
5. A method for connecting the stator enameled wire piercing connection structure of claim 1, characterized in that: The specific steps are as follows: S1, when the lead wire has only one wire core (20), directly proceed to step S2 for processing; when the lead wire has two or more wire cores (20), twist the wire cores (20) of the lead wire into a twist shape along the circumferential direction, and then proceed to step S2 for processing; S2. When the total number of the enameled wires (30) is not greater than three, directly proceed to step S3 for processing; when the total number of the enameled wires (30) is greater than three, directly proceed to step S4 for processing; S3, placing the connection end of the wire group inside the clamping portion (111), curling the clamping portion (111) inwardly by using a piercing terminal crimping machine, piercing the insulating layer of the enameled wire (30) by the piercing teeth (112) to connect with the conductive core of the enameled wire (30), and the side knife of the piercing terminal crimping machine cuts off the conductive connection block (12) between the piercing terminal (11) and the adjacent piercing terminal (11); S4. Group the lead wires and enameled wires (30), the number of groups being the total number of enameled wires (30) divided by three. When the calculated result is not an integer, round up the number. Place the connecting end of the first group inside the first piercing terminal (11) at the output end of the terminal strip (1), use a piercing terminal crimping machine to make the clamping portion (111) curl inward, and use the piercing teeth (112) to pierce the insulation layer of the enameled wire (30) of this group. Place the connecting end of the next group inside the next piercing terminal (11), use a piercing terminal crimping machine to make the clamping portion (111) curl inward, and use the piercing teeth (112) to pierce the insulation layer of the enameled wire (30) of this group, until the enameled wire (30) of the last group is pierced and connected by the piercing terminal (11), and the side knife of the piercing terminal crimping machine cuts off the conductive connection block (12) between the piercing terminal (11) and the next piercing terminal (11).
6. The connection method of the stator enameled wire piercing connection structure according to claim 5, characterized in that: When in step S2, the sum of the cross-sectional areas of the lead wire core (20) and the enameled wire (30) is less than a preset value, the connection ends of one or more enameled wires (30) are folded back, and then the process proceeds to step 3.
7. The connection method of the stator enameled wire piercing connection structure according to claim 5, characterized in that: When in step S2, the sum of the cross-sectional areas of the lead wire core (20) and the enameled wire (30) is less than a preset value, the lead wire core (20) is folded back and twisted circumferentially into a twisted shape, and then the process proceeds to step 3.
8. The connection method of the stator enameled wire piercing connection structure according to claim 5, characterized in that: The piercing terminal (11) and the conductive connecting block (12) are an integrated structure.
9. The connection method of the stator enameled wire piercing connection structure according to claim 5, characterized in that: The piercing teeth (112) are formed by drawing or stamping.
10. The connection method of the stator enameled wire piercing connection structure according to claim 5, characterized in that: The leads include power lines.