Fool-proof ignition coil

Abstract

The utility model relates to the field of ignition coils, and discloses a fool-proof ignition coil which comprises an ignition coil body, a secondary connecting piece arranged in the ignition coil body and a high-voltage sheath, one end of the high-voltage sheath is connected with the ignition coil body, the high-voltage sheath is internally communicated with the ignition coil body, and a high-voltage bolt used for conducting the secondary connecting piece is inserted in the high-voltage sheath. An inserting piece is arranged at the end, close to the secondary connecting piece, of the high-voltage plug pin, a protruding part is arranged on the inserting piece, the protruding part is electrically connected with the secondary connecting piece through a wire, and a guiding part for guiding when the high-voltage plug pin is inserted into the high-voltage sheath is arranged between the high-voltage sheath and the high-voltage plug pin. The guide part comprises a guide block and a guide slot, the guide block is convexly arranged on the outer wall of the high-voltage bolt, the guide slot is arranged in the high-voltage sheath along the axial direction of the high-voltage sheath, and the guide block can be inserted in the guide slot in a guide manner. Therefore, the probability that the ignition coil cannot be normally used due to the displacement of the high-voltage bolt is reduced.

Description

Technical Field

[0001] The utility model relates to the field of ignition coils, in particular to a fool-proof ignition coil. Background Art

[0002] In an automotive engine ignition system, an ignition coil is an actuator that provides ignition energy for igniting an air-fuel mixture in an engine cylinder.

[0003] A Chinese patent with the publication number CN211258866U discloses an anti-interference ignition coil, which includes a housing, a high-voltage sheath, and a cylinder head cover sealing ring disposed between the housing and the high-voltage sheath. A secondary connecting piece is inserted through the inner cavity of the cylinder head sealing ring. A high-voltage pin is inserted into the top of the inner cavity of the high-voltage sheath, and the top of the high-voltage pin is in contact and conduction with the secondary connecting piece.

[0004] In the above structure, the high-voltage pin is installed in the high-voltage sheath and connected to the secondary connecting piece in the cylinder head sealing ring to be in contact with each other, so as to achieve conduction between the two. However, the conduction stability between the high-voltage pin and the secondary connecting piece is poor only by the contact method. If a gap is generated between the high-voltage pin and the secondary connecting piece, the ignition coil cannot be used normally at this time. Summary of the Utility Model

[0005] Aiming at the disadvantages that the conduction stability between the high-voltage pin and the secondary connecting piece is poor only by the contact method in the prior art, and if a gap is generated between the high-voltage pin and the secondary connecting piece, the ignition coil cannot be used normally at this time, the utility model provides a fool-proof ignition coil that can improve the stability between the pressure pin and the secondary connecting piece.

[0006] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0007] A fool-proof ignition coil includes an ignition coil body, a secondary connecting piece disposed in the ignition coil body, and a high-voltage sheath that is connected to the ignition coil body at one end and is internally interconnected. A high-voltage pin for conducting the secondary connecting piece is inserted into the high-voltage sheath. A plug piece is disposed at one end of the high-voltage pin close to the secondary connecting piece, and a raised portion is disposed on the plug piece. The raised portion is electrically connected to the secondary connecting piece through a wire. A guiding member for guiding when the high-voltage pin is inserted into the high-voltage sheath is disposed between the high-voltage sheath and the high-voltage pin. The guiding member includes a guiding block protruding from the outer wall of the high-voltage pin and a guiding slot axially disposed in the high-voltage sheath for guiding the guiding block to be inserted.

[0008] With the above solution, the guide block provided on the high-voltage plug and the guide slot provided on the high-voltage sheath can be used for guiding when the high-voltage plug is inserted into the high-voltage sheath. Thus, when the high-voltage plug with the insert is inserted into the high-voltage sheath, the protruding parts on the insert are in the same orientation, which is convenient for subsequent workers to connect it to the secondary connecting piece through a wire. Since the high-voltage plug and the secondary connecting piece are connected to each other through a wire, even when the distance between the high-voltage plug and the secondary connecting piece changes due to vibrations or other situations, the secondary connecting piece can still be electrically connected to the high-voltage plug, making the connection between the high-voltage plug and the secondary connecting piece more stable.

[0009] Preferably, a plurality of the guide blocks are circumferentially and spacedly arranged along the outer wall of the high-voltage plug, and the plurality of guide blocks are unevenly arranged on the outer wall of the guide block. The number of the guide slots is the same as that of the guide blocks and their positions correspond one by one.

[0010] With the above solution, setting a plurality of guide blocks outside the high-voltage plug can be used for guiding when the high-voltage plug is inserted into the high-voltage sheath. At the same time, when the high-voltage plug inside the high-voltage sheath is deflected by an external force, the plurality of guide blocks are stressed together, thereby reducing the probability of the high-voltage plug being damaged by rotation due to the external force.

[0011] Preferably, a limiting member for limiting the high-voltage plug inserted into the high-voltage sheath is provided at one end of the high-voltage sheath away from the ignition coil body.

[0012] Preferably, the limiting member includes a limiting sleeve partially rotatably sleeved on the high-voltage sheath away from the ignition coil body. A plugging slot is provided in the limiting sleeve, which is aligned with the guide slot after the limiting sleeve rotates for the high-voltage plug to be inserted into the high-voltage sheath, or is misaligned with the guide slot after the limiting sleeve rotates to limit the high-voltage plug inserted into the high-voltage sheath. An anti-detachment member for reducing the probability of the limiting sleeve falling off the high-voltage sheath and a damping member for increasing the damping when the limiting sleeve rotates outside the high-voltage sheath are provided between the limiting sleeve and the high-voltage sheath.

[0013] With the above solution, the provided anti-detachment member can reduce the probability of the limiting sleeve sleeved on the high-voltage sheath detaching from the high-voltage sheath, and the provided damping member can increase the damping when the limiting sleeve rotates outside the high-voltage sheath, thereby reducing the probability of the high-voltage plug detaching due to the automatic rotation of the limiting sleeve. The plugging slot provided in the limiting sleeve can be rotated to a state aligned with the guide slot when the high-voltage plug needs to be installed into the installation slot, and at this time the high-voltage plug can be inserted into the high-voltage sheath; when the high-voltage plug is inserted into the high-voltage sheath, the limiting sleeve can be rotated again to misalign the plugging slot with the guide slot, and at this time the limiting sleeve can limit the high-voltage plug in the high-voltage sheath, thereby reducing the probability of it coming out of the high-voltage sheath.

[0014] Preferably, the limiting sleeve is made of plastic material, and the anti-slip component includes an anti-slip ring arranged on the outer wall of the high-voltage sleeve away from the ignition coil body, an anti-slip ring groove for inserting the anti-slip ring is arranged in the limiting sleeve, and an introduction slope is arranged on the anti-slip ring to facilitate the deformation of the limiting sleeve when the limiting sleeve is inserted onto the high-voltage sleeve, and the introduction slope increases in inclination from the end away from the ignition coil body to the end close to the ignition coil body.

[0015] By adopting the above scheme, a limit sleeve made of plastic material is selected so that the limit sleeve can undergo elastic deformation when it is mounted outside the high-voltage sheath, thereby facilitating the anti-slip ring arranged on the high-voltage sheath to be inserted into the anti-slip ring groove inside the limit sleeve, and the provided introduction slope can squeeze the limit sleeve when the limit sleeve is mounted outside the high-voltage sheath, thereby driving the limit sleeve to partially deform, thereby facilitating the anti-slip ring to be inserted into the anti-slip ring groove, and when the anti-slip ring is inserted into the anti-slip ring groove, the position of the limit sleeve can be limited, thereby reducing the probability of its detachment from the high-voltage sheath.

[0016] Preferably, an annular groove is provided at one end of the high-voltage sheath away from the ignition coil body for the limiting sleeve to be partially mounted on its outer wall, the anti-slip ring is arranged on the annular groove, and the outer wall of the limiting sleeve is flush with the outer wall of the high-voltage sheath.

[0017] By adopting the above solution, an annular groove is provided on the high-voltage sheath so that the limiting sleeve is partially sleeved thereon, and the outer wall of the limiting sleeve sleeved in the annular groove is flush with the outer wall of the high-voltage sheath, making the high-voltage sheath more beautiful after the limiting sleeve is sleeved.

[0018] Preferably, the damping component includes a plurality of damping blocks which are circumferentially arranged above the inlet inclined surface and above the anti-slip ring, a pressing inclined surface is arranged on the damping block, a pressing plate which abuts against the pressing inclined surface when the limiting sleeve is arranged outside the high-pressure sleeve is arranged in the anti-slip ring groove, a gap is provided between the pressing plate and the bottom of the anti-slip ring groove, and a connecting plate which is respectively connected to the pressing plate and the anti-slip ring groove at both ends is provided between the pressing plate and the anti-slip ring groove.

[0019] By adopting the above scheme, the pressure plate arranged in the anti-slip ring groove can squeeze the pressure inclined surfaces above the anti-slip ring against each other when the limit sleeve rotates, thereby increasing the damping of the limit sleeve during rotation, thereby reducing the probability of the high-voltage pin falling out of the high-voltage sleeve due to automatic rotation of the limit sleeve arranged outside the high-voltage sleeve, and the arranged connecting plate can create a gap between the pressure plate and the anti-slip ring groove, thereby facilitating the pressure plate to deform when it is squeezed against the pressure inclined surfaces.

[0020] Due to the adoption of the above technical solutions, the utility model has remarkable technical effects: the guide block provided on the high-voltage plug and the guide slot provided on the high-voltage sheath can guide when the high-voltage plug is inserted into the high-voltage sheath, so that when the high-voltage plug with the insertion piece is inserted into the high-voltage sheath, the convex portions on the insertion piece are in the same direction, which is convenient for subsequent workers to connect it with the secondary connection piece through a wire. Since the high-voltage plug and the secondary connection piece are connected to each other through a wire, even when the distance between the high-voltage plug and the secondary connection piece changes due to vibration or other conditions, the secondary connection piece can still be electrically connected to the high-voltage plug, making the connection between the high-voltage plug and the secondary connection piece more stable. Description of the Drawings

[0021] Figure 1 is the top view of an anti-fooling ignition coil in Embodiment 1;

[0022] Figure 2 is Figure 1 the enlarged view of part A in

[0023] Figure 3 is the right view of an anti-fooling ignition coil in Embodiment 1;

[0024] Figure 4 is the cross-sectional view when the high-voltage sheath is equipped with the high-voltage plug in Embodiment 1;

[0025] Figure 5 is the axonometric view of the high-voltage plug in Embodiment 1;

[0026] Figure 6 is the bottom view when the high-voltage sheath is equipped with the high-voltage plug in Embodiment 2;

[0027] Figure 7 is Figure 6 the cross-sectional view at B-B in

[0028] Figure 8 is Figure 7 the enlarged view of part C in

[0029] Figure 9 is the axonometric view of the high-voltage sheath in Embodiment 2;

[0030] Figure 10 is Figure 9 the enlarged view of part D in

[0031] Figure 11 is the front view of the limit sleeve in Embodiment 2;

[0032] Figure 12 is Figure 11 the cross-sectional view at E-E in

[0033] Figure 13Yes Figure 12 The enlarged view at position F in the figure;

[0034] Figure 14 It is an axonometric view when the limit sleeve rotates to limit the high-voltage plug in Embodiment 2 of the present invention.

[0035] The names of the parts referred to by each digital label in the above drawings are as follows: 1. Ignition coil body; 2. Secondary connecting piece; 3. High-voltage sheath; 4. High-voltage plug; 5. Insert piece; 6. Guide block; 7. Guide slot; 8. Limit sleeve; 9. Insertion slot; 10. Anti-detachment ring; 11. Anti-detachment ring groove; 12. Introduction inclined surface; 13. Annular groove; 14. Damping block; 15. Pressing inclined surface; 16. Pressing plate; 17. Connecting plate; 18. Protrusion. Specific embodiments

[0036] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0037] Embodiment 1

[0038] An anti-fooling ignition coil, referring to Figures 1 - 5 , includes an ignition coil body 1, a secondary connecting piece 2 disposed in the ignition coil body 1, and a high-voltage sheath 3 having one end connected to the ignition coil body 1 and internally communicating with each other. A high-voltage plug 4 for conducting the secondary connecting piece 2 is inserted in the high-voltage sheath 3. An insert piece 5 is provided at one end of the high-voltage plug 4 close to the secondary connecting piece 2. A protrusion 18 is provided on the insert piece 5. The protrusion 18 is electrically connected to the secondary connecting piece 2 through a wire (not shown in the figure). A guiding member for guiding when the high-voltage plug 4 is inserted into the high-voltage sheath 3 is provided between the high-voltage sheath 3 and the high-voltage plug 4. The guiding member includes a guiding block 6 protruding from the outer wall of the high-voltage plug 4 and a guiding slot 7 axially provided in the high-voltage sheath 3 for the guiding block 6 to be inserted and guided.

[0039] A plurality of guiding blocks 6 are circumferentially and spacedly arranged along the outer wall of the high-voltage plug 4, and the plurality of guiding blocks 6 are non-uniformly arranged on the outer wall of the guiding block 6. The number of guiding slots 7 is the same as that of the guiding blocks 6 and the positions correspond one by one. In this embodiment, the guiding block 6 and the guiding plug are respectively provided with 3.

[0040] Embodiment 2

[0041] The difference between this embodiment and Embodiment 1 is that, referring to Figures 6 - 14, a limiting component for limiting the high-voltage pin 4 inserted into the high-voltage sheath 3 is provided at one end of the high-voltage sheath 3 away from the ignition coil body 1. The limiting component includes a limiting sleeve 8 partially rotatably sleeved on the high-voltage sheath 3 away from the ignition coil body 1. A plugging slot 9 is provided in the limiting sleeve 8, which is aligned with the guiding slot 7 after the limiting sleeve 8 rotates for the high-voltage pin 4 to be inserted into the high-voltage sheath 3, or is misaligned with the guiding slot 7 after the limiting sleeve 8 rotates to limit the high-voltage pin 4 inserted into the high-voltage sheath 3. An anti-detachment component for reducing the probability of the limiting sleeve 8 falling off from the high-voltage sheath 3 and a damping component for increasing the damping when the limiting sleeve 8 rotates outside the high-voltage sheath 3 are provided between the limiting sleeve 8 and the high-voltage sheath 3.

[0042] The limiting sleeve 8 is made of plastic material. The anti-detachment component includes an anti-detachment ring 10 provided at the outer wall of the high-voltage sheath 3 away from the ignition coil body 1. An anti-detachment ring groove 11 for inserting the anti-detachment ring 10 is provided in the limiting sleeve 8. An introduction inclined surface 12 for facilitating the deformation of the limiting sleeve 8 when the limiting sleeve 8 is sleeved on the high-voltage sheath 3 is provided on the anti-detachment ring 10. The introduction inclined surface 12 inclines and increases from the end away from the ignition coil body 1 to the end close to the ignition coil body 1. An annular groove 13 for the limiting sleeve 8 to be partially sleeved on its outer wall is provided at the end of the high-voltage sheath 3 away from the ignition coil body 1. The anti-detachment ring 10 is provided on the annular groove 13, and the outer wall of the limiting sleeve 8 is flush with the outer wall of the high-voltage sheath 3.

[0043] The damping component includes a plurality of damping blocks 14 circumferentially and evenly arranged above the introduction inclined surface 12 and above the anti-detachment ring 10. A pressing inclined surface 15 is provided on the damping block 14. A pressing plate 16 that abuts against the pressing inclined surface 15 when the limiting sleeve 8 is sleeved outside the high-voltage sheath 3 is provided in the anti-detachment ring groove 11. There is a gap between the pressing plate 16 and the bottom of the anti-detachment ring groove 11, and a connecting plate 17 with both ends respectively connected to the two is provided between the pressing plate 16 and the anti-detachment ring groove 11.

[0044] The specific installation process of the high-voltage pin 4: When the high-voltage pin 4 needs to be installed into the high-voltage sheath 3, first rotate the limiting sleeve 8 to align the plugging slot 9 on the limiting sleeve 8 with the guiding slot 7 in the high-voltage sheath 3. At this time, rotate the high-voltage pin 4 so that the guiding block 6 on the high-voltage pin 4 is aligned with the plugging slot 9. At this time, the high-voltage pin 4 can be inserted into the high-voltage sheath 3. After the high-voltage pin 4 is inserted into the high-voltage sheath 3, the convex portion 18 on the insert piece 5 of the high-voltage pin 4 can be connected to the secondary connecting piece 2 in the ignition coil body 1 through a wire; after the high-voltage pin 4 is inserted into the high-voltage sheath 3, at this time, the limiting sleeve 8 can be rotated again to misalign the plugging slot 9 on the limiting sleeve 8 with the guiding slot 7 in the high-voltage sheath 3. At this time, the inner wall of the limiting sleeve 8 will limit the high-voltage pin 4 inserted into the high-voltage sheath 3, thereby reducing the probability of it falling out of the high-voltage sheath 3.

[0045] The above are only the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present utility model should also be regarded as within the protection scope of the present utility model.

Claims

1. A foolproof ignition coil, comprising an ignition coil body (1), a secondary connecting piece (2) arranged in the ignition coil body (1), and a high-voltage sheath (3) connected to the ignition coil body (1) at one end and internally interpenetrating therewith, wherein a high-voltage plug (4) for conducting the secondary connecting piece (2) is inserted in the high-voltage sheath (3), characterized in that: An inserting piece (5) is arranged at one end of the high-voltage plug (4) close to the secondary connecting piece (2), and a protrusion (18) is arranged on the inserting piece (5), and the protrusion (18) is electrically connected to the secondary connecting piece (2) through a wire. A guide component is arranged between the high-voltage sheath (3) and the high-voltage plug (4) for guiding the high-voltage plug (4) when it is inserted into the high-voltage sheath (3), and the guide component comprises a guide block (6) protruding from the outer wall of the high-voltage plug (4) and a guide slot (7) arranged in the high-voltage sheath (3) along the axial direction of the high-voltage sheath (3) for guiding the guide block (6) to be inserted.

2. The foolproof ignition coil according to claim 1, characterized in that: A plurality of guide blocks (6) are arranged at intervals along the circumferential direction of the outer wall of the high-voltage plug (4), and the plurality of guide blocks (6) are arranged unevenly on the outer wall of the guide block (6). The number of the guide slots (7) is the same as that of the guide blocks (6) and their positions correspond one to one.

3. The foolproof ignition coil according to claim 1, characterized in that: A limiting component for limiting the position of a high-voltage plug (4) inserted into the high-voltage sheath (3) is provided at one end of the high-voltage sheath (3) away from the ignition coil body (1).

4. The foolproof ignition coil according to claim 3, characterized in that: The limiting component comprises a limiting sleeve (8) which is partially rotatably sleeved on the high-voltage sleeve (3) away from the ignition coil body (1); a plug-in slot (9) is arranged in the limiting sleeve (8) so that the high-voltage plug pin (4) can be inserted into the high-voltage sleeve (3) when the limiting sleeve (8) rotates, or the high-voltage plug pin (4) can be inserted into the high-voltage sleeve (3) when the limiting sleeve (8) rotates and is misaligned with the guide slot (7) when the limiting sleeve (8) rotates, and an anti-dropping component for reducing the probability of the limiting sleeve (8) falling off the high-voltage sleeve (3) and a damping component for increasing the damping of the limiting sleeve (8) when it rotates outside the high-voltage sleeve (3) are arranged between the limiting sleeve (8) and the high-voltage sleeve (3).

5. The foolproof ignition coil according to claim 4, characterized in that: The limiting sleeve (8) is made of plastic material, and the anti-slip component comprises an anti-slip ring (10) arranged on the outer wall of the high-voltage sleeve (3) away from the ignition coil body (1), an anti-slip ring groove (11) for inserting the anti-slip ring (10) is arranged in the limiting sleeve (8), and an introduction slope (12) is arranged on the anti-slip ring (10) to facilitate the deformation of the limiting sleeve (8) when the limiting sleeve (8) is inserted onto the high-voltage sleeve (3), and the introduction slope (12) is inclined and increased from an end away from the ignition coil body (1) to an end close to the ignition coil body (1).

6. The foolproof ignition coil according to claim 5, characterized in that: An annular groove (13) is provided at one end of the high-voltage sheath (3) away from the ignition coil body (1) for the limiting sleeve (8) to be partially sleeved on its outer wall, the anti-slip ring (10) is arranged on the annular groove (13), and the outer wall of the limiting sleeve (8) is flush with the outer wall of the high-voltage sheath (3).

7. The foolproof ignition coil according to claim 5, characterized in that: The damping component comprises a plurality of damping blocks (14) which are arranged circumferentially above the introduction inclined surface (12) and above the anti-slip ring (10); a pressing inclined surface (15) is arranged on the damping block (14); a pressing plate (16) is arranged in the anti-slip ring groove (11) and abuts against the pressing inclined surface (15) when the limit sleeve (8) is sleeved outside the high-voltage sleeve (3); a gap exists between the pressing plate (16) and the bottom of the anti-slip ring groove (11); and a connecting plate (17) is arranged between the pressing plate (16) and the anti-slip ring groove (11) with two ends respectively connected to the two.

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