Mounting rod, ignition coil, engine and vehicle

Abstract

The utility model discloses a mounting rod, an ignition coil, an engine and a vehicle. The number of the limiting protrusions is multiple, and the multiple limiting protrusions are arranged on the outer wall of the rod body. Therefore, the multiple limiting protrusions are arranged on the outer wall of the rod body, so that interference fit between the limiting protrusions and the inner wall of the mounting hole of the engine can be achieved, supporting of the mounting rod is increased, the modality of the mounting state of the mounting rod is improved, vibration excitation generated in the operation process of the engine can be restrained, the mounting rod is prevented from being abraded, and the service life of the engine is prolonged. The spark plug screw in contact with the spring is prevented from being abraded, and the service life of the ignition coil and the spark plug can be prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially is related to a mounting rod, ignition coil, engine and vehicle. BACKGROUND

[0002] With the development of science and technology and the improvement of user living standards, vehicles become indispensable means of transport for people. The ignition coil is arranged in the vehicle, which can convert the low-voltage current of the vehicle power supply into the high-voltage current required by the spark plug to generate sufficient electric sparks to ignite the mixed gas in the engine, which can ensure the normal starting and stable operation of the engine.

[0003] In the related art, due to the material characteristics of the ignition coil mounting rod, the modal of the mounting rod is low, and in the actual operation process of the engine, the mounting rod drives the spring to move along the radial and axial directions of the mounting rod, the spring and the spark plug screw head generate relative motion to produce wear, and the metal powder generated by the wear of the spark plug screw head head will fall between the mounting rod and the spark plug ceramic body, thereby generating a surface flashover risk. SUMMARY

[0004] The utility model aims at at least solves one of the prior art technical problems. For this purpose, one object of the utility model is to provide a mounting rod, which can not only improve the modal of the mounting rod, but also avoid wear of the mounting rod and the spark plug screw and other structures.

[0005] The utility model further provides an ignition coil.

[0006] The utility model further provides an engine.

[0007] The utility model still further provides a vehicle.

[0008] According to the mounting rod of the utility model, including: the rod body, the limiting protrusion, the limiting protrusion is multiple, multiple The limiting protrusion is set up in the outer wall of the rod body.

[0009] Therefore, by setting multiple limiting protrusions on the outer wall of the rod body, the limiting protrusions can not only be in interference fit with the inner wall of the mounting hole of the engine to increase the support of the mounting rod and improve the modal of the mounting rod in the installed state, but also can suppress the vibration excitation generated during the operation of the engine, avoid wear of the mounting rod, avoid wear of the spark plug screw in contact with the spring, and prolong the service life of the ignition coil and the spark plug.

[0010] In some examples of the utility model, multiple limiting protrusions form at least one limiting protrusion group, and each limiting protrusion group includes multiple circumferentially arranged limiting protrusions.

[0011] In some examples of the present application, the plurality of limiting protrusions are arranged axially.

[0012] In some examples of the present application, the plurality of limiting protrusions are helical in shape.

[0013] In some examples of the present application, the limiting protrusions and the rod body are integrally formed.

[0014] In some examples of the present application, an annular sealing lip is further included, which is circumferentially arranged on the outer wall of the rod body.

[0015] In some examples of the present application, the annular sealing lip is arranged at one axial end of the rod body and axially spaced apart from the plurality of limiting protrusions.

[0016] In some examples of the present application, the annular sealing lip is arranged at one axial end of the rod body and axially spaced apart from the plurality of limiting protrusions.

[0017] According to the ignition coil of the present application, the mounting rod is provided.

[0018] In some examples of the present application, the ignition coil further includes a high-voltage pack arranged at one axial end of the mounting rod, a spring member arranged in the mounting rod, one end of the spring member electrically connected to the high-voltage pack, and the other end adapted to be in contact with the spark plug of the engine.

[0019] According to the engine of the present application, the mounting rod is arranged in the mounting hole, and the interference amount between the limiting protrusion and the inner wall of the mounting hole is a, which satisfies the relationship: 0.1mm≤a≤0.5mm.

[0020] In some examples of the present application, the mounting rod is provided with an annular sealing lip, and the single-sided interference amount between the annular sealing lip and the inner wall of the mounting hole is b, which satisfies the relationship: 0≤b≤0.95mm.

[0021] According to the vehicle of the present application, the engine is provided.

[0022] Additional aspects and advantages of the present application will be given in part in the following description, and will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the references to the following drawings, of which:

[0024] Figure 1 is a schematic diagram of the ignition coil according to an embodiment of the present application;

[0025] Figure 2 is a schematic diagram of the ignition coil according to an embodiment of the present application;

[0026] Figure 3 is a schematic diagram of the ignition coil according to an embodiment of the present application;

[0027] Figure 4 is a partial cross-sectional view of the engine according to an embodiment of the present application;

[0028] Figure 5 is a partial schematic diagram of the mounting rod according to an embodiment of the present application;

[0029] Figure 6 is a cross-sectional view of the mounting rod according to an embodiment of the present application;

[0030] Figure 7 is a schematic diagram of the ignition coil after being sheathed according to an embodiment of the present application;

[0031] Figure 8 is a modal lifting scheme simulation result schematic diagram of the ignition coil according to an embodiment of the present application;

[0032] Figure 9 is a pull-out force simulation result schematic diagram of the mounting rod during assembly according to an embodiment of the present application;

[0033] Figure 10 is a pull-out force calculation result schematic diagram of the mounting rod during assembly according to an embodiment of the present application.

[0034] Reference signs:

[0035] 100, ignition coil;

[0036] 200, engine; 300, engine body;

[0037] 10, high-voltage package;

[0038] 20, mounting rod; 201, spring member; 202, limiting protrusion; 203, limiting protrusion group; 204, sheath; 205, rod body;

[0039] 2021, limiting protrusion one; 2022, limiting protrusion two; 2023, limiting protrusion three;

[0040] 30, spark plug;

[0041] 40. annular sealing lip;

[0042] 50. mounting hole. DETAILED DESCRIPTION

[0043] The embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described with reference to the accompanying drawings are exemplary, and the embodiments of the present application are described in detail below.

[0044] The following refers to Figures 1-10 The mounting rod 20 according to the embodiments of the present application is described below, which can be used to constitute the ignition coil 100, and the ignition coil 100 can be mounted in the engine 200, which can be applied to a vehicle.

[0045] In combination Figures 1-10 As shown in the drawings, the mounting rod 20 according to the embodiments of the present application can mainly include: a rod body 205 and a limiting protrusion 202. Among them, the rod body 205 of the mounting rod 20 mainly plays a supporting and fixing role, which can not only ensure the structural strength and stability of the mounting rod 20 itself, but also ensure that the ignition coil 100 can be stably mounted on the engine cylinder head or other appropriate positions, and can prevent the ignition coil 100 from loosening or shifting during the operation of the engine 200.

[0046] Further, the inside of the rod body 205 is usually designed with a channel or cavity to conduct the high-voltage current generated from the ignition coil 100 to the spark plug 30, which can ensure that the high-voltage current generated by the ignition coil 100 can be smoothly and efficiently transmitted to the spark plug 30, thereby triggering the ignition process to ensure the normal driving of the vehicle.

[0047] Further, the limiting protrusions 202 are multiple, and the multiple limiting protrusions 202 are arranged on the outer wall of the rod body 205, which can form multiple fixing points or supporting points on the outer wall of the rod body 205, and can make the limiting protrusions 202 and the inner wall of the mounting hole 50 of the engine 200 tightly combined and generate a certain pressure, thereby inhibiting the mounting rod 20 from shaking or deviating, and making the mounting rod 20 more stable. In addition, the multiple limiting protrusions 202 can also disperse the force received by the mounting rod 20, avoid the problem of stress concentration in the local part of the mounting rod 20, further improve the structural strength and durability of the mounting rod 20, and improve the stability and reliability of the mounting rod 20.

[0048] Further, the gap between the ignition coil mounting rod 20 and the cylinder head is not increased by the structure of the limiting protrusion 202, and in the case of an excessively long mounting rod 20, the mounting rod 20 is prone to resonance during operation of the engine 200; after the limiting protrusion 202 is added, the limiting protrusion 202 structure of the mounting rod 20 is in interference fit with the inner wall of the cylinder head hole, the rigidity of the structure and the natural frequency of the structure are significantly improved, and resonance caused by a large amount of low-frequency vibration input of the engine 200 can be avoided, so that the vibration response and impact response of the mounting rod 20 can be greatly reduced during operation of the engine 200.

[0049] In addition, due to the structural design of the engine 200, the distance between the engine cylinder head cover and the spark plug mounting hole is large, which causes the length of the ignition coil mounting rod 20 to be too long. By providing a limiting protrusion 202 on the outer peripheral wall of the mounting rod 20 and making the limiting protrusion 202 suitable for interference fit with the inner wall of the mounting hole 50 of the engine 200, the ignition coil 100 can be matched with mounting rods 20 of different lengths, and the stability of the ignition coil 100 can be ensured when the ignition coil 100 is matched with mounting rods 20 of different lengths. The flexibility and reliability of the structure of the ignition coil 100 can be improved, and the scale of the change of the mounting rod 20 is small, the mold change is small, and the cost change is also small.

[0050] Therefore, by providing a limiting protrusion 202 on the outer peripheral wall of the mounting rod 20 and making the limiting protrusion 202 suitable for interference fit with the inner wall of the mounting hole 50 of the engine 200, the support for the mounting rod 20 and the mounting hole 50 of the engine 200 can be increased to improve the modal value of the mounting state of the mounting rod 20, and the vibration excitation generated during the operation of the engine 200 can be suppressed to avoid wear of the mounting rod 20 and wear of the spark plug screw in contact with the spring. The service life of the ignition coil 100 and the spark plug 30 can be prolonged.

[0051] In some embodiments of the present application, the material of the rod body 205 can be rubber, which has elasticity, insulation and other properties. It not only plays a role in buffering and shock absorption, reducing the influence of vibration on the ignition coil mounting rod 20 and its connecting parts, but also effectively prevents current leakage and short circuit, and improves the stability and reliability of the ignition system.

[0052] In some embodiments of the present application, the limiting protrusion 202 can be made of rubber, which has elasticity, insulation and other properties. Using rubber material not only provides more stable connection and support and maintains the integrity of the shape and function of the limiting protrusion 202, but also prevents the limiting protrusion 202 part of the mounting rod 20 from leaking electricity, and improves the stability and reliability of the ignition coil 100.

[0053] In some embodiments of the utility model, the design of mounting rod 20 makes it applicable to different models and specifications of engine 200. By adjusting the length and shape of mounting rod 20, it can be matched with the mounting hole 50 of different engines, so that the applicability of ignition coil 100 can be improved.

[0054] Combining Figure 1 , Figure 5 and Figure 6 , a plurality of limiting protrusions 202 form at least one limiting protrusion group 203, and each limiting protrusion group 203 includes a plurality of circumferentially arranged limiting protrusions 202. Specifically, by a plurality of circumferentially spaced limiting protrusions 202 jointly forming a limiting protrusion group 203, and the spacing between each adjacent two limiting protrusions 202 is equal, a plurality of limiting protrusions 202 in a limiting protrusion group 203 are uniformly distributed along the outer peripheral wall of the rod body 205, which can ensure the rationality and reliability of the structure of the mounting rod 20, effectively prevent the mounting rod 20 from shaking or tilting after installation, and improve the stability of the mounting rod 20 after installation. In addition, the setting of the limiting protrusion group 203 can also suppress the vibration excitation generated during the operation of the engine 200, can avoid the wear of the mounting rod 20 and the spark plug screw of the ignition coil 100, can improve the safety and reliability of the ignition coil 100, and prolong the service life of the ignition coil 100.

[0055] In some embodiments of the utility model, the number and structure size of the limiting protrusions 202 in a limiting protrusion group 203 can be adjusted according to the specific size and structure of the mounting rod 20.

[0056] Combining Figure 1 , Figure 5 and Figure 6 , the limiting protrusion group 203 is a plurality of limiting protrusion groups 203 arranged axially. Specifically, by arranging a plurality of limiting protrusion groups 203 axially, and providing a fixing point or a support point by a plurality of limiting protrusion groups 203, the modal value of the mounting rod 20 can be further improved, the inhibitory effect on the vibration excitation generated during the operation of the engine 200 can be further enhanced, the fixing or limiting effect on the mounting rod 20 can be further improved, and the wear of the mounting rod 20 and the spark plug screw can be more effectively avoided, which can improve the stability and reliability of the ignition coil 100.

[0057] It should be noted that a plurality of limiting protrusions one 2021 are uniformly and circumferentially spaced to form a limiting protrusion group 203, a plurality of limiting protrusions two 2022 are uniformly and circumferentially spaced to form a limiting protrusion group 203, and a plurality of limiting protrusions three 2023 are uniformly and circumferentially spaced to form a limiting protrusion group 203.

[0058] In some embodiments of the utility model, the limiting protrusion group 203 can also be any one or any two of the three limiting protrusion groups 203 to meet the assembly requirements of the vehicle structure.

[0059] In some embodiments of the utility model, the number of limiting protrusion groups 203 can be more than three, and can be increased to four or more. The specific number and specific position of the limiting protrusion group 203 can be adjusted according to the specific size and structure of the mounting rod 20.

[0060] In combination with the drawings shown in Figure 1 , Figure 2 and Figure 5 , the plurality of limiting protrusions 202 can be spiral-shaped as a whole. Specifically, by setting the plurality of limiting protrusions 202 as a whole in a spiral shape, not only can the mounting rod 20 be provided with multi-directional support force or force points, better preventing the mounting rod 20 and other components from producing relative sliding in various directions, but also can disperse stress to make the stress of the mounting rod 20 more uniform, can avoid the problem of local stress concentration of the mounting rod 20, can make the mounting rod 20 more stable after installation, further, can improve the modal value of the mounting rod 20, improve the reliability and durability of the mounting rod 20, can inhibit the relative movement of the components and the spark plug 30 of the mounting rod 20 during the operation of the engine 200, to prevent the screw rod of the mounting rod 20 and the spark plug 30 from being worn, can improve the stability and reliability of the ignition system.

[0061] In combination with the drawings shown in Figure 1 , Figure 4 and Figure 5 , the limiting protrusion 202 and the rod body 205 are an integral structure. Specifically, by setting the limiting protrusion 202 and the rod body 205 as an integral structure, not only can the connection structure between the limiting protrusion 202 and the rod body 205 be simple and direct, stable and reliable, can effectively prevent the limiting protrusion 202 from separating from the mounting rod 20, but also can simplify the structure of the mounting rod 20, reduce the number of parts, and reduce the modification of the mounting rod 20 mold, can reduce the production cost of the mounting rod 20.

[0062] In combination with the drawings shown in Figure 1 , Figure 2 and Figure 4As shown, the mounting rod 20 further comprises an annular sealing lip 40 circumferentially arranged on the outer wall of the rod body 205. Specifically, by arranging the annular sealing lip 40 on the mounting rod 20 and circumferentially arranging the annular sealing lip 40 on the outer wall of the rod body 205, the annular sealing lip 40 can be in interference fit with the inner wall of the mounting hole 50 of the engine 200, and the annular sealing lip 40 can be tightly combined with the inner wall of the mounting hole 50 of the engine 200 and generate a certain pressure, thereby not only increasing the support of the mounting rod 20 and the mounting hole 50 of the engine 200, but also improving the modal state of the mounting rod 20, and suppressing the vibration excitation generated during the operation of the engine 200, effectively solving the wear problem of the mounting rod 20 and the spark plug screw rod, prolonging the service life of the ignition coil 100 and the spark plug 30, and additionally, the added annular sealing lip 40 is ingenious and easy to implement, and the cost of parts changes little.

[0063] In some embodiments of the present application, the annular sealing lip 40 can be made of rubber material. Rubber has the characteristics of elasticity and insulation, and the use of rubber material not only provides more stable connection and support, maintains the integrity of the shape and function of the annular sealing lip 40, but also prevents the annular sealing lip 40 of the mounting rod 20 from leaking, and improves the stability and reliability of the ignition coil 100.

[0064] As shown in Figure 1 , Figure 2 and Figure 4 , the annular sealing lip 40 is located at one axial end of the rod body 205 and is axially spaced apart from the plurality of limiting protrusions 202. Specifically, by locating the annular sealing lip 40 at one axial end of the rod body 205 and axially spacing apart from the plurality of limiting protrusions 202, the rationality of the structure of the mounting rod 20 can be ensured, and the installation and fixation of the mounting rod 20 can be facilitated.

[0065] Further, the limiting protrusion 202 and the annular sealing lip 40 can mutually assist and jointly act. Both the limiting protrusion 202 and the annular sealing lip 40 can provide a force point, which not only ensures the stability and reliability of the mounting rod 20 during installation, effectively prevents the mounting rod 20 from deviating or wearing due to local stress concentration during installation, but also ensures the stability and firmness of the mounting rod 20 after installation, and suppresses the vibration excitation transmitted to the ignition coil 100. Therefore, the joint action of the limiting protrusion 202 and the annular sealing lip 40 can effectively improve the modal state of the mounting rod 20 in the installed state, effectively solve the wear problem of the mounting rod 20 and the spark plug screw rod, and more effectively improve the stability and reliability of the ignition coil 100.

[0066] As shown in Figure 1 , Figure 2 andFigure 4 As shown in the figures, the annular sealing lips 40 are multiple, and the multiple annular sealing lips 40 are arranged in the axial direction of the rod body 205. Specifically, by arranging the multiple annular sealing lips 40 in the axial direction of the rod body 205, the effect of buffering can be achieved, the influence of the vibration or impact in the ignition coil 100 on the mounting rod 20 can be weakened, the loosening or damage of the connection between the mounting rod 20 and other components caused by vibration and impact can be prevented, the reliability of the ignition system can be improved. In addition, the support to the mounting rod 20 and the mounting hole 50 of the engine 200 can be further increased, the installation state of the mounting rod 20 can be further improved, the suppression effect of the vibration excitation generated during the operation of the engine 200 can be further enhanced, the wear problem of the mounting rod 20 and the spark plug screw can be more effectively solved, and the stability and reliability of the ignition coil 100 can be further improved.

[0067] In some embodiments of the present application, the specific number, specific size and installation position of the annular sealing lips 40 can be appropriately adjusted according to the assembly requirements of the vehicle structure.

[0068] In combination with Figure 1 , Figure 2 and Figure 4 , the ignition coil 100 according to the present application can mainly include the above-mentioned mounting rod 20. Specifically, since the modal value of the mounting rod 20 is higher and has good working performance and stability, the application of the mounting rod 20 to the ignition coil 100 can suppress the vibration excitation generated during the operation of the engine 200, avoid the wear of the mounting rod 20 and the spark plug screw, prolong the service life of the ignition coil 100 and the spark plug 30, and improve the working performance of the ignition coil 100.

[0069] In combination with Figure 1 , Figure 2 and Figure 4 , the ignition coil 100 further includes a high-voltage pack 10, the high-voltage pack 10 is arranged at one end in the axial direction of the mounting rod 20, a spring member 201 is arranged in the mounting rod 20, one end of the spring member 201 is electrically connected with the high-voltage pack 10, and the other end is adapted to be in contact with the spark plug 30 of the engine 200 for electrical connection.

[0070] Specifically, the structure of the ignition coil 100 further includes the high-voltage pack 10, the high-voltage pack 10 is arranged at one end in the axial direction of the mounting rod 20, and the high-voltage pack 10 can transmit the high voltage generated by the ignition coil 100 to the spark plug 30, thereby triggering the ignition process. This can ensure the accurate transmission of ignition energy, ensure the rationality and reliability of the structure of the ignition coil 100, and ensure the normal driving of the vehicle.

[0071] Further, the mounting rod 20 is provided with a spring member 201, one end of the spring member 201 is electrically connected with the high-voltage pack 10, and the other end is adapted to be in contact with the spark plug 30 of the engine 200 for electrically connecting, so that the spring member 201 can not only serve as a conductive medium to effectively transmit the high-voltage electricity generated by the ignition coil 100 to the spark plug 30 to ensure the normal work of the spark plug 30, but also can adaptively adjust its shape and position during installation to ensure accurate alignment with the spark plug 30, so that poor contact or contact failure caused by assembly error can be avoided. In addition, during the driving process of the vehicle, the spring member 201 can adapt to the vibration excitation transmitted to the mounting rod 20 due to its elastic properties, so as to ensure the stable connection between the high-voltage pack 10 and the spark plug 30, and improve the stability and reliability of the ignition coil 100.

[0072] In combination with the figures shown in Figure 1 , Figure 2 and Figure 4 , the engine 200 according to the present application can mainly include: an engine body 300, the engine body 300 is provided with a mounting hole 50; the above-mentioned ignition coil 100, the mounting rod 20 is arranged in the mounting hole 50, and the interference amount of the limiting protrusion 202 and the inner wall of the mounting hole 50 is a, which satisfies the relationship: 0.1mm≤a≤0.5mm.

[0073] Specifically, by arranging the mounting hole 50 on the engine body 300, the positioning and installation of the mounting rod 20 and other internal components of the engine 200 can be facilitated, the installation of the internal components of the engine 200 can be simplified, the accuracy of the installation of the internal components of the engine 200 can be improved, and the normal working performance of the engine 200 can be ensured.

[0074] Further, by arranging the mounting rod 20 in the mounting hole 50 of the engine body 300, not only can the ignition coil 100 be stably and accurately connected to the engine 200 to realize effective ignition function and ensure the normal operation of the engine 200, but also the accurate positioning of the ignition coil 100 on the engine 200 can be realized, the installation of the ignition coil 100 can be simplified, and the installation cost and difficulty can be reduced.

[0075] Further, the interference amount of the limiting protrusion 202 and the inner wall of the mounting hole 50 is a, which satisfies the relationship: 0.1mm≤a≤0.5mm. Specifically, according to the specific structure of the ignition coil 100, the size of the mounting rod limiting protrusion 202 is Φb, and the size of the mounting hole 50 of the engine 200 is Φa, wherein Φa=23±0.1mm, Φb=23.6±0.3mm, and the calculated radial single-side interference amount of the limiting protrusion 202 and the mounting hole 50 of the engine 200 is 0.1mm-0.5mm.

[0076] Because the above size uses interference fit, the assembly force needs to be evaluated during assembly. As shown in Figure 1 、 Figure 2 and Figure 4 , the friction coefficient between rubber and aluminum alloy inner wall is 0.1-0.5, the interference amount is set to 0.3mm, the assembly force simulation calculation is carried out for different friction coefficients and the number of limiting protrusions, and the calculation results are shown in Table 1.

[0077] It should be noted that the assembly force includes insertion force and pulling-out force, and the insertion force and the pulling-out force are comparable in actual assembly process.

[0078] From the calculation results, it can be concluded that when 1 circle of limiting protrusions 202 is used, the pulling-out force is 0.69N-3.5N; when 2 circles of limiting protrusions 202 are used, the pulling-out force is 1.42N-6.61N; and when 3 circles of limiting protrusions 202 are used, the pulling-out force is 2.07N-8.94N.

[0079] It should be noted that #1 in Table 1 and Table 2 represents the limiting protrusion group 203 composed of limiting protrusion one 2021, #2 represents the limiting protrusion group 203 composed of limiting protrusion two 2022, and #3 represents the limiting protrusion group 203 composed of limiting protrusion three 2023. In addition, Figure 8 , protrusion 2 represents one circle of limiting protrusion two 2022 arranged circumferentially along the mounting rod 20, protrusion 13 represents one circle of limiting protrusion one 2021 and one circle of limiting protrusion three 2023 arranged circumferentially along the mounting rod 20, and protrusion 123 represents one circle of limiting protrusion one 2021, one circle of limiting protrusion two 2022, and one circle of limiting protrusion three 2023 arranged circumferentially along the mounting rod 20.

[0080] Table 1 Pulling-out force calculation results of different friction coefficients and different number of limiting protrusions

[0081]

[0082] Further, the number of different limiting protrusions 202 has different modal improvement effects, modal simulation is carried out for different numbers of limiting protrusions 202, and the simulation and calculation results are shown in Table 2. From the calculation results, it can be seen that when 3 circles of limiting protrusions 202 are used, the modal improvement is the largest, and the modal value is increased from 85.8Hz to 301.8Hz without limiting protrusions 202; when 1 circle of limiting protrusions 202 is used, the modal can also be improved (the modal value can be increased to 196.2Hz); and when 2 circles of limiting protrusions 202 are used, the modal also has a large improvement (the modal value can be increased to 268.7Hz).

[0083] Table 2 Modal calculation results corresponding to different numbers of limiting protrusions

[0084]

[0085] In some embodiments of the utility model, the structure effect of the limiting protrusion 202 of the mounting rod 20 of different lengths can also be given according to simulation reference direction.

[0086] Further, since the ignition coil 100 has higher structural strength and good working performance and stability, the application of the ignition coil 100 to the engine 200 can effectively improve the working performance of the engine 200, improve the stability and reliability of the engine 200, and prolong the service life of the engine 200.

[0087] In combination with the figures shown in Figure 9 , Figure 10 and Figure 10 , according to the engine 200 of the utility model, the mounting rod 20 is provided with an annular sealing lip 40, the single-side interference amount of the annular sealing lip 40 and the inner wall of the mounting hole 50 is b, and b satisfies the relationship: 0≤b≤0.95mm.

[0088] Specifically, by simultaneously adding the limiting protrusion 202 and the annular sealing lip 40 on the mounting rod 20, the support to the mounting rod 20 and the mounting hole 50 of the engine 200 can be increased, the rigidity of the structure and the natural frequency of the structure can be significantly improved, and the resonance caused by a large number of low-frequency vibration inputs of the engine 200 can be avoided. Therefore, in the working of the engine 200, the structural design proposed by the utility model can greatly reduce the vibration response and impact response of the mounting rod 20, and the strength design is mainly improved from the following three aspects: first, the addition of the limiting protrusion 202 and the annular sealing lip 40 can avoid the wear caused by the contact of the cylinder wall surface at the middle part of the connecting pipe; second, the addition of the limiting protrusion 202 and the annular sealing lip 40 can significantly reduce the wear of the spark plug screw produced by the contact of the end region of the structure and the spring, and can prolong the service life of the ignition coil 100 and the spark plug 30; third, the addition of the limiting protrusion 202 and the annular sealing lip 40 can also significantly improve the fatigue life of the mounting rod 20, and provide more safety margin for the cost reduction design.

[0089] Further, the single-side interference amount of the annular sealing lip 40 and the inner wall of the mounting hole 50 is b, and b satisfies the relationship: 0≤b≤0.95mm. Specifically, according to the specific structure of the ignition coil 100, the size of the annular sealing lip 40 of the mounting rod 20 is Φd, and the size of the mounting hole 50 of the engine 200 is Φc, wherein Φc=24±0.1mm, and Φd=23.8 +20mm, and the calculated radial single-side interference amount of the annular sealing lip 40 and the mounting hole 50 of the engine 200 is -0.15mm~0.95mm, in the embodiment of the utility model, in order to ensure that the annular sealing lip 40 and the mounting hole 50 of the engine 200 are stably and reliably interference-fitted, the range of the single-side interference amount b between the annular sealing lip 40 and the inner wall of the mounting hole 50 of the engine 200 is set as: 0≤b≤0.95mm.

[0090] Further, different friction coefficients (0.1 and 0.3) are used to simulate the insertion force for different interference amounts (radial single-side) of the annular sealing lip 40 on the mounting rod 20, and the simulation results are shown in Table 3. From the simulation results, it can be concluded that the insertion force of the last annular sealing lip 40 is the smallest, and the insertion force is 17.8N under the condition of single-side 700μm and friction coefficient 0.3.

[0091] Table 3 Sealing lip insertion force simulation

[0092]

[0093] In actual use, a reasonable number of annular sealing lips 40 and the positions of the annular sealing lips 40 can be selected according to the acceptable range of assembly force, and a reasonable number of limiting protrusions and the interference amount of the limiting protrusions can be selected.

[0094] Since the length or thickness of rubber will change significantly during assembly, the mechanical simulation method of rubber assembly can better understand the assembly mechanical behavior of rubber parts, so as to optimize the structure design and obtain more accurate size chain.

[0095] In the actual verification process of the utility model, the last annular sealing lip 40 and 3 limiting protrusions 202 are selected, and the single-side interference amount of the limiting protrusion 202 and the inner wall of the mounting hole 50 of the engine 200 is 0.3mm. Through factory physical assembly test, the assembly force is acceptable.

[0096] At the same time, the physical object has passed the bench durability verification, and there is no metal abrasion on the ceramic corrugated part, and there is no wear mark on the spark plug screw rod, which proves that the interference limiting protrusion 202 and the annular sealing lip 40 of the mounting rod 20 can effectively solve the wear problem of the spark plug screw rod.

[0097] Combining Figure 1 And Figure 2 Figure 4 Figure 1 Figure 7As shown, the outer sleeve of the mounting rod 20 is sleeved with a sheath 204, the rigidity of the sheath 204 is greater than the rigidity of the mounting rod 20. Specifically, by setting the sheath 204 on the outer sleeve of the mounting rod 20, and making the rigidity of the sheath 204 greater than the rigidity of the mounting rod 20, the mounting rod 20 mode can be improved by improving the rigidity of the whole mounting rod 20, so as to suppress vibration, effectively avoid the wear problem of the spark plug screw head during the operation of the engine 200, and further improve the stability and reliability of the ignition coil 100.

[0098] The vehicle according to the present application can mainly comprise the above-mentioned engine 200. Specifically, since the structure of the engine 200 is more stable and reliable, and has good working performance, the application of the engine 200 to the vehicle can ensure the normal driving of the vehicle, and improve the stability and reliability of the vehicle during driving.

[0099] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0100] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0101] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A mounting bar, characterized by Comprising: a rod body (205); a plurality of limiting protrusions (202) disposed on the outer wall of the rod body (205); a plurality of annular sealing lips (40) circumferentially disposed on the outer wall of the rod body (205).

2. The mounting bar of claim 1, wherein The plurality of limiting protrusions (202) form at least one limiting protrusion group (203), and each limiting protrusion group (203) comprises a plurality of circumferentially arranged limiting protrusions (202).

3. The mounting bar of claim 2, wherein The plurality of limiting protrusion groups (203) are axially arranged.

4. The mounting bar of claim 1, wherein The plurality of limiting protrusions (202) are helical as a whole.

5. The mounting bar of claim 1, wherein The limiting protrusion (202) and the rod body (205) are an integral structure.

6. The mounting bar of claim 1, wherein The annular sealing lip (40) is located at one axial end of the rod body (205) and is axially spaced from the plurality of limiting protrusions (202).

7. The mounting bar of claim 1, wherein The plurality of annular sealing lips (40) are axially spaced on the rod body (205).

8. An ignition coil characterized by, Comprising: The mounting rod (20) of any one of claims 1-7.

9. The ignition coil of claim 8, wherein, Further comprising a high-voltage pack (10) disposed at one axial end of the mounting rod (20), wherein a spring member (201) is disposed in the mounting rod (20), one end of the spring member (201) is electrically connected to the high-voltage pack (10), and the other end is adapted to be in contact with a spark plug (30) of an engine (200).

10. An engine characterized by, Comprising: An engine body (300) having a mounting hole (50) disposed thereon; The ignition coil (100) of claim 8 or 9, wherein the mounting rod (20) is disposed in the mounting hole (50), and the interference amount between the limiting protrusion (202) and the inner wall of the mounting hole (50) is a, which satisfies the relationship: 0.1mm≤a≤0.5mm.

11. The engine of claim 10, wherein The mounting rod (20) is provided with an annular sealing lip (40), and the single-sided interference amount between the annular sealing lip (40) and the inner wall of the mounting hole (50) is b, which satisfies the relationship: 0≤b≤0.95mm.

12. A vehicle characterized by comprising: Comprising: The engine (200) of claim 10 or 11.

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