High-low voltage combined coil assembly

Abstract

The invention discloses a high-voltage and low-voltage combined coil assembly which comprises a high-voltage coil, a low-voltage coil and a hollow coil holder, the hollow coil holder comprises multiple groups of high-voltage and low-voltage combined coil holders, and the high-voltage and low-voltage combined coil holders comprise multiple low-voltage coil frameworks and high-voltage coil frameworks which are axially arranged at intervals; two low-voltage needles are arranged on an end plate of the low-voltage coil framework at the starting end of the winding, and the low-voltage needles are in lap joint with the circuit board; a plurality of low-voltage wire passing groove groups are arranged on the front and rear end plates of the high-voltage coil framework; the low-voltage coil is wound on the low-voltage coil framework after being wired through the low-voltage wire passing groove group, and the two ends of the low-voltage coil are wound on the two low-voltage needles respectively; high-voltage terminals are arranged on a front end plate and a rear end plate of the high-voltage coil framework, and the high-voltage terminals on the front end plate and the rear end plate are distributed diagonally; and the high-voltage coil is wound on the high-voltage coil framework. The high-voltage coil and the low-voltage coil are integrated on one coil holder and are coupled in a distributed manner, so that high-voltage value output is more uniform, and product consistency is improved.

Description

Technical Field

[0001] The present invention relates to the field of pulse igniters, and particularly to a high-low voltage combined coil assembly. Background Art

[0002] In traditional pulse igniters, the high-voltage coil and the low-voltage coil are two independent components. The high-voltage coil consists of a high-voltage skeleton and a secondary winding wound around the high-voltage coil, and the low-voltage coil consists of a magnetic rod and a primary winding wound around the magnetic rod. The low-voltage coil is sleeved into the high-voltage coil, and then the wire ends of the two low-voltage coils are separated by hand and wound around the power terminals, or the wire ends of the low-voltage coil are electrically welded to the power pads on the PCBA board by hand.

[0003] In the prior art, a patent document with the application number (202310759277.1) discloses an ignition coil manufacturing process and a pulse igniter with tinning-free treatment for the secondary coil, belonging to the technical field of ignition coil manufacturing. It mainly includes processes such as preparing the low-voltage component, preparing the high-voltage component, potting the high-low voltage components, generating an alternating potential at both ends of the primary coil, removing the paint on the secondary enameled wire on the high-voltage pin, tinning treatment, and electrically conducting the high-voltage pin and the secondary enameled wire, so that the high-voltage pin outputs high voltage. In this document, the low-voltage coil is still wound around the magnetic rod, and it needs to be fixed during the winding process of the low-voltage coil, which easily makes the high-voltage value output by the high-voltage terminal uneven and the consistency poor.

[0004] A patent document with the application number (CN 202123198151.7) discloses a high-low voltage coil assembly convenient for automatic batch production, mainly including a high-voltage coil sub-assembly and a low-voltage coil sub-assembly; the high-voltage coil sub-assembly includes a high-voltage coil skeleton with a hollow structure and a high-voltage coil wound around the high-voltage coil skeleton, and a low-voltage winding post is fixedly arranged at one end of the high-voltage coil skeleton, and the low-voltage coil sub-assembly penetrates through the high-voltage coil skeleton; the low-voltage coil sub-assembly includes a magnetic rod and a low-voltage coil, and the two ends of the low-voltage coil are respectively wound around two different low-voltage winding posts. In this document, it is disclosed that after the two free ends of the low-voltage coil are wound around the low-voltage winding posts, the entire high-low voltage coil assembly is directly embedded into the shell of the pulse igniter as a whole; when embedding, the pads on the PCBA board of the pulse igniter are close to the low-voltage coil wound around the low-voltage winding post, and the two free ends of the low-voltage coil are directly soldered and electrically connected to the pads on the PCBA board by using an automatic soldering machine. In this document, not only is the low-voltage coil wound around the magnetic rod; at the same time, the low-voltage coil is wound around the low-voltage post, and when connecting to the circuit board, two lead wires still need to be led out, the lead wires still need to be sheared, and then tinned separately, resulting in low production efficiency.

[0005] In summary, the prior art has the following deficiencies: 1) It is impossible to achieve fully automated production. The two free ends of the low-voltage coil are soft wires, and their positions are random and uncertain. It is necessary to manually solder the two free ends to the two low-voltage pads on the PCBA board respectively, and after soldering, it is necessary to manually cut off the excess lead wires. This process involves high-difficulty actions such as the identification, grasping, pressing, and wire cutting of the free ends. Even a customized high-end intelligent robot is difficult to achieve. Moreover, as a traditional and mature product, the ignition coil has a limited profit margin. When considering full automation production, the factor of production cost has to be taken into account. 2) The traditional process has a potential risk of product failure. During the shearing process of the lead wire, it is inevitable that it will splash and fall into the ignition coil housing. If not discovered and processed in time, this product will be mixed into the large batch of goods. During subsequent testing or subsequent use, the residual lead wire will cause the high-voltage coil to break down and lead to product scrapping. 3) The traditional process has a fixed process. Adding processes results in poor consistency. 4) There are many processes. The lead of the low-voltage coil needs to be tinned separately and cannot be tinned synchronously with the high-voltage coil. Summary of the Invention

[0006] The object of the present invention is to overcome the defects of the prior art and provide a high-low voltage combined coil assembly, including multiple groups of high-low voltage combined wire frames. The low-voltage coil runs suspended above the high-voltage coil, integrating the high-low voltage coils on one wire frame. At the same time, the high-low voltage coils are distributed and coupled (low voltage - high voltage - low voltage - high voltage - low voltage) to make the high-voltage value output more uniform and improve the consistency of the product.

[0007] The object of the present invention is achieved as follows: A high-low voltage combined coil assembly includes a high-voltage coil, a low-voltage coil, and a hollow wire frame. The hollow wire frame includes multiple groups of high-low voltage combined wire frames. The high-low voltage combined wire frame includes multiple low-voltage coil skeletons and high-voltage coil skeletons arranged at axial intervals; two low-voltage pins are provided on the end plate of the low-voltage coil skeleton at the starting end of winding, and the low-voltage pins are lapped with the circuit board; multiple groups of low-voltage wire grooves are provided on the front and rear end plates of the high-voltage coil skeleton; the low-voltage coil passes through the low-voltage wire groove groups and then winds around the low-voltage coil skeleton, and the two ends of the low-voltage coil are respectively wound around the two low-voltage pins; high-voltage terminals are provided on the front and rear end plates of the high-voltage coil skeleton, and the high-voltage terminals on the front and rear end plates are diagonally distributed; the high-voltage coil winds around the high-voltage coil skeleton.

[0008] In order to avoid the phenomenon that the low-voltage winding on the magnetic rod is prone to short circuit in the past and ensure the safety distance; the low-voltage wire groove groups are arranged at the upper ends of the front and rear end plates of the high-voltage coil skeleton, and the distance between the low-voltage coil during wiring and the high-voltage coil wound around the high-voltage coil skeleton is greater than 1.5 mm.

[0009] In order to prevent the magnetic rod from moving and reserve an exhaust passage for the air inside the combined wire holder, a limiting baffle is provided on the end plate of the low-voltage coil skeleton at the starting end of the winding, so that one end of the hollow wire holder is in a semi-closed structure.

[0010] In order to exhaust air better, through holes are provided on the front end plate of the high-voltage coil skeleton from top to bottom.

[0011] In order to enhance the insulation performance of the high-voltage package of the pulse igniter and improve the durability of the product, the through holes are filled with epoxy.

[0012] In order to better overlap with the circuit board, two fixing blocks are provided on the end plate of the low-voltage coil skeleton at the starting end of the winding, and the low-voltage pins are inserted on the fixing blocks.

[0013] In order to be applicable to pulse igniters of different specifications, the hollow wire holder includes at least three groups of windings wound around the high-low voltage combined wire holder; the arrangement of the three groups of windings is low-voltage coil, high-voltage coil, low-voltage coil.

[0014] The present invention adopts the above technical solutions. Compared with the prior art, the beneficial effects are as follows: The present invention adopts a combined wire holder. The high-low voltage combined wire holder is composed of a plurality of low-voltage coil skeletons and high-voltage coil skeletons arranged at axial intervals. A low-voltage wire routing groove group is provided on the high-voltage coil skeleton. After the low-voltage coil passes through the low-voltage wire groove group for routing, it is wound around the low-voltage coil skeleton. The low-voltage coil and the high-voltage coil are distributed and coupled (low-voltage - high-voltage - low-voltage - high-voltage - low-voltage). The low-voltage coil is routed in suspension above the high-voltage coil, ensuring a safe distance.

[0015] In terms of process, the winding machine first winds the high-voltage wire on the wire holder and then continues to wind the low-voltage wire on the wire holder, avoiding high-low voltage breakdown and having good safety. Using the structure of the present invention for high-low voltage winding eliminates the process of separately tinning the wire ends of the low-voltage coil in the traditional process, improving production efficiency.

[0016] Compared with the previous situation where the low-voltage coil is wound on the magnetic rod, short-circuit phenomena are likely to occur. At the same time, the low-voltage coil needs to be fixed on the magnetic rod, and the flatness of the low-voltage coil is not good, affecting the uniformity of the output high-voltage value. The present invention integrates the winding of the low-voltage coil and the high-voltage coil on one wire holder, making the flatness of the low-voltage coil better, the energy output more uniform, the output of the high-voltage value more uniform, the error from the standard value smaller, and the consistency of the product better; two low-voltage pins are provided on the end plate of the low-voltage coil skeleton at the starting end of the winding. The two ends of the low-voltage coil are wound around the low-voltage pins. When connecting to the low-voltage solder pad of the circuit board later, there is no need to lead out two wires at the ends. Only by overlapping the low-voltage lead pins wound with the ends of the low-voltage coil with the circuit board can electrical connection be achieved, realizing automated production in the process of connecting to the low-voltage solder pad of the circuit board. Description of the Drawings

[0017] Figure 1 Schematic diagram of the hollow wire rack structure of Embodiment 1 of the present invention Figure 1 。

[0018] Figure 2 Schematic diagram of the hollow wire rack structure of Embodiment 1 of the present invention Figure 2 。

[0019] Figure 3 Schematic diagram of the hollow wire rack structure of Embodiment 1 of the present invention Figure 3 。

[0020] Figure 4 Side view of the hollow wire rack structure of Embodiment 1 of the present invention.

[0021] Figure 5 Schematic diagram of the lap joint between the hollow wire rack and the circuit board of Embodiment 1 of the present invention

[0022] Figure 6 Schematic diagram of the hollow wire rack structure of Embodiment 2 of the present invention

[0023] Figure 7 Side view of the hollow wire rack structure of Embodiment 2 of the present invention

[0024] Wherein, 1 is the first low-voltage coil skeleton, 1-1 is the first low-voltage pin, 1-2 is the second low-voltage pin; 2 is the first high-voltage coil skeleton, 2-1 is the first low-voltage wire groove group, 2-2 is the second low-voltage wire groove group, 2-3 is the first high-voltage terminal, 2-4 is the second high-voltage terminal, 3 is the second low-voltage coil skeleton, 4 is the second high-voltage coil skeleton, 4-1 is the third low-voltage wire groove group, 4-2 is the fourth low-voltage wire groove group, 4-3 is the third high-voltage terminal, 4-4 is the fourth high-voltage terminal; 5 is the third low-voltage coil skeleton, 6 is the third high-voltage coil skeleton, 6-1 is the fifth low-voltage wire groove group, 6-2 is the sixth low-voltage wire groove group, 6-3 is the fifth high-voltage terminal, 6-4 is the sixth high-voltage terminal; 7 is the fourth low-voltage coil skeleton, 8 is the limit baffle, 9 is the fixed block, 10 is the circuit board, 11 is the through hole. Specific embodiments

[0025] Embodiment 1: The hollow wire rack is two sets of high-low voltage combined wire racks; Such as Figures 1-5A high-low voltage combined coil assembly as shown includes a high-voltage coil, a low-voltage coil and a hollow wire frame. The hollow wire frame includes two sets of high-low voltage combined wire frames, and each high-low voltage combined wire frame includes a plurality of low-voltage coil skeletons and high-voltage coil skeletons arranged at axial intervals; specifically, it includes a first low-voltage coil skeleton 1, a first high-voltage coil skeleton 2, a second low-voltage coil skeleton 3, a second high-voltage coil skeleton 4 and a third low-voltage coil skeleton 5; on the end plate of the first low-voltage coil skeleton 1 at the wire winding starting end, there are a first low-voltage pin 1-1 and a second low-voltage pin 1-2. On the end plate of the first low-voltage coil skeleton 1 at the wire winding starting end, there are two fixing blocks 9, and the two low-voltage pins are inserted into the fixing blocks 9, and the low-voltage pins are lapped with the circuit board 10; On the front and rear end plates of the high-voltage coil skeleton, there are a plurality of groups of low-voltage wire grooves; specifically, on the front and rear end plates of the first high-voltage coil skeleton 2, there are a first group of low-voltage wire grooves 2-1 and a second group of low-voltage wire grooves 2-2; on the front and rear end plates of the second high-voltage coil skeleton 4, there are a third group of low-voltage wire grooves 4-1 and a fourth group of low-voltage wire grooves 4-2; After the low-voltage coil passes through the groups of low-voltage wire grooves, it is wound around the low-voltage coil skeleton, and the two ends of the low-voltage coil are respectively wound around the two low-voltage pins; specifically, the low-voltage coil starts winding at the first low-voltage pin 1-1, winds around the wire groove on the first low-voltage coil skeleton 1, then enters the wire groove of the second low-voltage coil skeleton 3 through the first group of low-voltage wire grooves 2-1 for winding, and then enters the low-voltage wire groove of the third low-voltage coil skeleton 5 through the third group of low-voltage wire grooves 4-1 for winding. After that, it passes through the fourth group of low-voltage wire grooves 4-2 and the second group of low-voltage wire grooves 2-2 to end at the second low-voltage pin 1-2; On the front and rear end plates of the high-voltage coil skeleton, there are high-voltage terminals, and the high-voltage terminals on the front and rear end plates are diagonally distributed; the high-voltage coil is wound around the high-voltage coil skeleton; specifically, on the front and rear end plates of the first high-voltage coil skeleton 2, there are a first high-voltage terminal 2-3 and a second high-voltage terminal 2-4; on the front and rear end plates of the second high-voltage coil skeleton 4, there are a third high-voltage terminal 4-3 and a fourth high-voltage terminal 4-4, and the two high-voltage terminals on the front and rear end plates are diagonally distributed; the high-voltage coil on the first high-voltage coil skeleton 2 starts winding from the first high-voltage terminal 2-3, and then winds around the three wire grooves on the first high-voltage coil skeleton 2 and ends at the second high-voltage terminal 2-4; the high-voltage coil on the second high-voltage coil skeleton 4 starts winding from the third high-voltage terminal 4-3, and then winds around the three wire grooves on the second high-voltage coil skeleton 4 and ends at the fourth high-voltage terminal 4-4.

[0026] The common specifications of pulse igniters include two - head type, three - head type, four - head type, five - head type, and six - head type. The coils after high - and low - voltage winding are applicable to the four - head type pulse igniter. If it is required to be applicable to the two - head type pulse igniter, the low - voltage coil only needs to be wound on the first low - voltage coil skeleton 1 and the second low - voltage coil skeleton 3, and the high - voltage coil only needs to be wound on the first high - voltage coil skeleton 2. If it is required to be applicable to the three - head type pulse igniter, the high - voltage coil does not need to be wound at the high - voltage terminal four 4 - 4.

[0027] Embodiment 2: The hollow wire frame is a three - group high - and low - voltage combined wire frame; As Figures 6-7 A high - and low - voltage combined coil assembly shown includes a high - voltage coil, a low - voltage coil, and a hollow wire frame. The hollow wire frame includes two groups of high - and low - voltage combined wire frames. The high - and low - voltage combined wire frame includes a plurality of low - voltage coil skeletons and high - voltage coil skeletons arranged at axial intervals; specifically, it includes a first low - voltage coil skeleton 1, a first high - voltage coil skeleton 2, a second low - voltage coil skeleton 3, a second high - voltage coil skeleton 4, a third low - voltage coil skeleton 5, a third high - voltage coil skeleton 6, and a fourth low - voltage coil skeleton 7. On the end plate of the first low - voltage coil skeleton 1 at the winding starting end, there are a low - voltage pin one 1 - 1 and a low - voltage pin two 1 - 2. On the end plate of the first low - voltage coil skeleton 1 at the winding starting end, there are two fixing blocks 9, and the two low - voltage pins are inserted into the fixing blocks 9, and the low - voltage pins are lapped with the circuit board 10.

[0028] On the front and rear end plates of the high - voltage coil skeleton, there are a plurality of low - voltage wire groove groups; specifically, on the front and rear end plates of the first high - voltage coil skeleton 2, there are a low - voltage wire groove group one 2 - 1 and a low - voltage wire groove group two 2 - 2; on the front and rear end plates of the second high - voltage coil skeleton 4, there are a low - voltage wire groove group three 4 - 1 and a low - voltage wire groove group four 4 - 2; on the front and rear end plates of the second high - voltage coil skeleton 6, there are a low - voltage wire groove group five 6 - 1 and a low - voltage wire groove group six 6 - 2; The low - voltage coil is wound on the low - voltage coil skeleton after passing through the low - voltage wire groove group, and the two ends of the low - voltage coil are respectively wound on the two low - voltage pins; specifically, the low - voltage coil starts winding at the low - voltage lead pin one 1 - 1, winds around the wire groove on the first low - voltage coil skeleton 1, then enters the wire groove of the second low - voltage coil skeleton 3 through the low - voltage wire groove group one 2 - 1 for winding, then enters the low - voltage winding wire groove of the third low - voltage coil skeleton 5 through the low - voltage coil wire groove group three 4 - 1 for winding, and finally enters the low - voltage winding wire groove of the fourth low - voltage coil skeleton 7 through the low - voltage wire groove group five 6 - 1 for winding. After passing through the low - voltage wire groove group six 6 - 2, the low - voltage coil wire groove group four 4 - 2, and the low - voltage coil wire groove group two 2 - 2, it ends at the low - voltage lead pin two 1 - 2; High-voltage terminals are provided on the front and rear end plates of the high-voltage coil skeleton, and the high-voltage terminals on the front and rear end plates are diagonally distributed; the high-voltage coil is wound around the high-voltage coil skeleton; specifically, high-voltage terminal one 2-3 and high-voltage terminal two 2-4 are provided on the front and rear end plates of the first high-voltage coil skeleton 2; high-voltage terminal three 4-3 and high-voltage terminal four 4-4 are provided on the front and rear end plates of the second high-voltage coil skeleton 4, and the two high-voltage terminals on the front and rear end plates are diagonally distributed; high-voltage terminal five 6-3 and high-voltage terminal six 6-4 are provided on the front and rear end plates of the third high-voltage coil skeleton 6, and the two high-voltage terminals on the front and rear end plates are diagonally distributed; the high-voltage coil on the first high-voltage coil skeleton 2 starts winding from high-voltage terminal one 2-3, then winds around the three winding grooves on the first high-voltage coil skeleton 2, and ends at high-voltage terminal two 2-4; the high-voltage coil on the second high-voltage coil skeleton 4 starts winding from high-voltage terminal three 4-3, then winds around the three winding grooves on the second high-voltage coil skeleton 4, and ends at high-voltage terminal four 4-4; the high-voltage coil on the third high-voltage coil skeleton 6 starts winding from high-voltage terminal five 6-3, then winds around the three winding grooves on the third high-voltage coil skeleton 6, and ends at high-voltage terminal six 6-4.

[0029] The coils after high- and low-voltage winding are applicable to the six-head type pulse igniter. If it is required to be applicable to the five-head type pulse igniter, no winding is needed at high-voltage terminal six 6-4 of the high-voltage coil.

[0030] The low-voltage wire groove group is arranged at the upper end of the front and rear end plates of the high-voltage coil skeleton. There is a certain safety distance between the low-voltage coil during wire routing and the high-voltage coil wound around the high-voltage coil skeleton. The safety distance is greater than 1.5 mm; the high- and low-voltage coils are separated. The low-voltage wire routing adopts a bracket and suspended method to ensure the safety distance and avoid high- and low-voltage breakdown, with good safety performance.

[0031] A limit baffle 8 is provided on the end plate of the first low-voltage coil skeleton 1 at the wire-winding starting end, so that one end of the hollow wire frame is in a semi-closed structure; when the magnetic rod is installed, it enters from the side of the non-limit baffle of the middle cavity, which can not only prevent the magnetic rod from moving, but also reserve an exhaust channel for the air inside the combined wire frame. Through holes 11 are opened from top to bottom on the front end plate of the high-voltage coil skeleton for exhaust. The through holes 11 are filled with epoxy, which can enhance the insulation performance of the high-voltage package of the pulse igniter and improve the durability of the product.

[0032] The present invention provides a high-low voltage combined coil assembly. By winding and integrating the low-voltage coil and the high-voltage coil on a coil holder, the flatness of the low-voltage coil is better, the energy output is uniform, and the high-voltage value output is also more uniform. Conventionally, when the low-voltage coil is wound around a magnetic rod, the output high-voltage value is the standard value ±3 kV. When using the combined coil holder of the present invention for winding, with the low-voltage coil running above the high-voltage coil, the output high-voltage value is the standard value ±1 kV, with a smaller error, making the performance of the pulse igniter more stable and capable of maintaining a relatively consistent ignition effect under various working conditions; this can not only improve the ignition success rate, but also extend the service life of the igniter, reducing equipment damage and maintenance costs caused by frequent ignition failures.

[0033] The present invention is not limited to the above embodiments. Based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and deformations to some of the technical features without creative labor according to the disclosed technical content, and these substitutions and deformations are all within the protection scope of the present invention.

Claims

1. A high-low voltage combined coil assembly, comprising a high-voltage coil, a low-voltage coil and a hollow wire frame, characterized in that: The hollow wire frame includes multiple groups of high- and low-voltage combined wire frames, and the high- and low-voltage combined wire frame includes multiple low-voltage coil skeletons and high-voltage coil skeletons arranged axially at intervals; two low-voltage pins are arranged on the end plate of the low-voltage coil skeleton at the starting end of winding, and the low-voltage pins are overlapped with the circuit board; multiple low-voltage wire slot groups are arranged on the front and rear end plates of the high-voltage coil skeleton; the low-voltage coil is wound on the low-voltage coil skeleton after being routed through the low-voltage wire slot group, and the two ends of the low-voltage coil are respectively wound on the two low-voltage pins; high-voltage terminals are arranged on the front and rear end plates of the high-voltage coil skeleton, and the high-voltage terminals on the front and rear end plates are diagonally distributed; the high-voltage coil is wound on the high-voltage coil skeleton.

2. A high and low voltage combined coil assembly according to claim 1, characterized in that: The low-voltage wire-passing slot group is arranged at the upper ends of the front and rear end plates of the high-voltage coil skeleton, and the distance between the low-voltage coil and the high-voltage coil wound on the high-voltage coil skeleton during wiring is greater than 1.5 mm.

3. A high and low voltage combined coil assembly according to claim 1, characterized in that: A limit baffle is arranged on the end plate of the low-voltage coil frame at the starting end of the winding, so that one end of the hollow wire frame is in a semi-closed structure.

4. A high and low voltage combined coil assembly according to claim 1, characterized in that: A through hole is provided on the front end plate of the high voltage coil skeleton from top to bottom.

5. A high and low voltage combined coil assembly according to claim 4, characterized in that: The through holes are filled with epoxy.

6. A high and low voltage combined coil assembly according to claim 1, characterized in that: Two fixing blocks are arranged on the end plate of the low-voltage coil frame at the starting end of the winding, and the low-voltage needle is plugged into the fixing blocks.

7. A high and low voltage combined coil assembly according to claim 1, characterized in that: The hollow wire rack includes at least three groups of windings wound on a high-low voltage combined wire rack; the three groups of windings are arranged in a low-voltage coil, a high-voltage coil, and a low-voltage coil.

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