Lightweight start-stop starter switch

Abstract

The utility model discloses a light-weight start-stop starter switch, which comprises a switch main body and a movable iron core assembly, the switch main body comprises a switch cover and a switch shell connected with the switch cover; the switch cover is connected with a first contact bolt and a second contact bolt, and a coil is arranged in the switch shell. The movable iron core assembly comprises an integrally-formed movable iron core, one end of the movable iron core is connected with a push rod, the other end of the movable iron core is connected with a pull rod, and the push rod is connected with a contact copper plate. The movable iron core is movably arranged on the switch shell, and one end of the movable iron core extends out of the outer side of the switch shell; an annular flange is arranged on the outer side of the movable iron core, the reset spring is connected to the movable iron core in a sleeving mode and located on the outer side of the switch shell, one end of the reset spring abuts against the outer wall of the switch shell, and the other end of the reset spring abuts against the annular flange. According to the utility model, the axial length of the switch main body is reduced, the light weight requirement of the starter switch is met, and the reliability and the service life of the starter switch are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of starter switch, specifically relates to a lightweight start-stop starter switch. BACKGROUND

[0002] As the core control component of the automobile starter system, the performance and the rationality of the structure design of the starter switch are directly related to the reliability, stability and service life of the starter. In the prior art, there are many problems to be solved in the structure design of the starter switch, especially the problems of excessive length of axial size and insufficient reliability, which have been difficult to meet the development requirements of lightweight, miniaturization and high reliability of the starter switch in the current automobile industry.

[0003] The typical structure of the existing starter switch is shown in the patent scheme with the publication number CN222507380U, and the return spring is arranged in the switch shell. Although this layout can realize the basic switch function, the return spring occupies a long axial position, resulting in excessive length of the axial length of the starter switch. In the current situation of increasingly compact overall space layout of the automobile, the excessive axial size not only increases the installation difficulty of the starter switch in the engine compartment, but also limits the layout of the surrounding components, which is not conducive to the miniaturization and lightweight design of the automobile as a whole.

[0004] With the development of the automobile industry, the demand for lightweight of the starter switch is increasingly urgent. However, due to the structure limitation of the built-in return spring, the existing starter switch is difficult to realize effective reduction of the axial size, and cannot meet the development requirements of lightweight.

[0005] In addition, as shown in the related design of the external return spring, Figure 2 In order to limit the stroke of the return spring, the general practice is to design a baffle welded with the moving iron core. However, in the actual working process of the starter switch, the moving iron core will be subjected to frequent electromagnetic attraction and return spring force, and will produce reciprocating motion. This motion will cause the welding point to be subjected to a large impact tension, and the welding point is prone to fatigue fracture under long-term action. Once the welding point is broken, the stroke of the return spring will be out of control, which will cause the moving iron core to fail to reset accurately, and further affect the normal work of the starter switch. UTILITY MODEL CONTENTS

[0006] The utility model aims at the problems existing in the prior art, and provides a lightweight start-stop starter switch, which reduces the axial length of the switch main body, meets the demand of lightweight of the starter switch, and improves the reliability and service life of the starter switch.

[0007] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of:

[0008] A kind of lightweight start-stop starter switch, including switch main body and moving iron core assembly;The switch main body includes switch cover and the switch shell connected with the switch cover;The switch cover is connected with contact bolt one and contact bolt two, and the switch shell is equipped with coil;The moving iron core assembly includes moving iron core, push rod connected with one end of the moving iron core, pull rod connected with the other end of the moving iron core, and the push rod is connected with contact copper plate;The moving iron core is movably arranged in the switch shell, and one end extends outside the switch shell;The outside of the moving iron core is equipped with annular flange, the reset spring is sleeved on the moving iron core and located outside the switch shell, one end of the reset spring abuts against the outer wall of the switch shell, and the other end abuts against the annular flange.

[0009] Further, one end of the moving iron core is provided with a cavity, a limit ring is fixedly arranged at the port of the cavity, and the pull rod is arranged in the cavity, one end of the pull rod passes through the limit ring and is coaxially movable relative to the moving iron core;The pull rod is sleeved with engagement spring, one end of the engagement spring abuts against the baffle of the pull rod, and the other end abuts against the limit ring.

[0010] Further, the switch cover, the switch shell, the limit ring and the port of the cavity, and the coil and the switch shell are fixed by riveting.

[0011] Further, the contact copper plate is axially movable along the push rod, the push rod is sleeved with overtravel spring outside, one end of the overtravel spring is connected with the contact copper plate, and the other end is connected with the moving iron core.

[0012] Further, the contact copper plate is connected with an insulating bushing, and the contact copper plate is axially movably connected with the push rod through the insulating bushing;The end of the push rod is connected with an insulating gasket, and the insulating gasket abuts against the insulating bushing to limit the maximum stroke of the overtravel spring.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] The design of the external reset spring avoids setting additional installation space in the switch shell, thereby effectively reducing the axial length of the switch main body, meeting the lightweight demand of the starter switch, helping to reduce the volume of the entire starter switch and improve the space utilization rate.

[0015] By designing the annular flange and the moving iron core as an integral molding structure, the use of welding points is avoided, the risk of welding point fatigue fracture is fundamentally eliminated, the reliability and service life of the starter switch are improved, and the failure rate caused by welding point fracture is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0017] Figure 1 It is a sectional structure schematic view of the start-stop starter switch in an embodiment of the present application.

[0018] Figure 2 It is a sectional structure schematic view of the prior art in an embodiment of the present application.

[0019] In the figure: 1, contact bolt one; 2, contact bolt two; 3, switch cover; 4, insulating gasket; 5, contact copper plate; 6, insulating bushing; 7, switch shell; 8, overtravel spring; 9, push rod; 10, coil; 11, moving iron core; 12, engagement spring; 13, pull rod; 14, return spring; 15, limit ring. DETAILED DESCRIPTION

[0020] The technical solutions of the present application will be described clearly and completely in the following with reference to the drawings in the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0021] In the description of the present application, it should be explained that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, 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 indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0022] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0023] In the description of the utility model, it also needs to be explained that, unless there is clear provision and limitation, the terms "arrange", "install", "connect" and "connect" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements, for the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] The typical structure of the existing starter switch is shown in the patent scheme with the publication number CN222507380U, and the reset spring is arranged in the switch shell. Although this layout can realize the basic switch function, the reset spring occupies a long axial position, resulting in the excessive length of the axial dimension of the starter switch. In the current situation of increasingly compact overall space layout of the automobile, the excessive axial dimension not only increases the installation difficulty of the starter switch in the engine compartment, but also limits the layout of the surrounding components, which is not conducive to the miniaturization and lightweight design of the automobile as a whole.

[0025] With the development of the automobile industry, the demand for lightweight of the starter switch is increasingly urgent. However, due to the structure limitation of the built-in reset spring, the existing starter switch is difficult to realize effective reduction of the axial dimension, and cannot meet the development requirement of lightweight.

[0026] In addition, as shown in the related design of the external reset spring, Figure 2 In order to limit the stroke of the reset spring, the general method is to design a baffle welded with the moving iron core. However, in the actual working process of the starter switch, the moving iron core will be subjected to frequent electromagnetic attraction and reset spring force, and will produce reciprocating motion. This motion will cause the welding point to be subjected to a large impact tension, and the welding point is prone to fatigue fracture under long-term action. Once the welding point is broken, the stroke of the reset spring will lose the limitation, which will cause the moving iron core to fail to reset accurately, and further affect the normal work of the starter switch.

[0027] In view of the above technical problems, as shown in the Figure 1 The utility model discloses a kind of lightweight start-stop starter switches of embodiment, including switch main body and moving iron core component;Switch main body includes switch cover 3 and the switch shell 7 connected with switch cover 3;Switch cover 3 is connected with contact bolt one 1 and contact bolt two 2, and coil 10 is provided in switch shell 7;Moving iron core component includes integrally formed moving iron core 11, one end of moving iron core 11 is connected push rod 9, the other end is connected pull rod 13, and push rod 9 is connected contact copper plate 5;Moving iron core 11 is movably arranged in switch shell 7, and one end extends outside switch shell 7;The outside of moving iron core 11 is provided with annular flange, reset spring 14 is sleeved on moving iron core 11, and located outside switch shell 7, one end of reset spring 14 abuts the outer wall of switch shell 7, and the other end abuts annular flange.

[0028] When no power is applied, the return spring 14 is in its natural state, and its elastic force acts on the annular flange of the moving iron core 11, keeping the moving iron core 11 in its initial position. At this time, the push rod 9 and the contact copper plate 5 are separated from the contact bolt 1 and the contact bolt 2, and the pull rod 13 does not exert any pulling action on the starter transmission mechanism, so the entire switch is in the open state.

[0029] When coil 10 is energized, it generates a strong electromagnetic attraction. This electromagnetic attraction acts on the moving iron core 11, overcoming the spring force of the return spring 14, causing the moving iron core 11 to move closer to coil 10. Since one end of the moving iron core 11 is connected to push rod 9 and the other end is connected to pull rod 13, the movement of the moving iron core 11 will drive push rod 9 and pull rod 13 to move synchronously. Push rod 9 pushes contact copper plate 5 to contact contact bolt 1 and contact bolt 2, thereby making them conductive and realizing the circuit connection. At the same time, pull rod 13 pulls the starter transmission mechanism, causing the starter to start working.

[0030] When coil 10 is de-energized, the electromagnetic attraction disappears, and the spring force of return spring 14 begins to function. One end of return spring 14 abuts against the outer wall of switch housing 7, and the other end abuts against the annular flange of moving iron core 11. Under the action of the spring force, it pushes moving iron core 11 to move away from coil 10, returning it to its initial position. When moving iron core 11 moves, it drives push rod 9 and pull rod 13 to move synchronously. Push rod 9 separates from contact copper plate 5, contact bolt 1 and contact bolt 2, breaking the circuit. Pull rod 13 also stops pulling on the starter transmission mechanism, and the starter stops working.

[0031] In the prior art, the reset spring 14 is disposed inside the switch housing 7, occupying a relatively long axial position, resulting in an excessively long axial length of the starter switch. However, in this embodiment, the reset spring 14 is sleeved on the moving iron core 11 and located outside the switch housing 7, such as... Figure 1 As shown. The external design avoids setting up additional installation space inside the switch housing 7, thereby effectively reducing the axial length of the switch body, meeting the requirements for lightweight starter switches, helping to reduce the overall size of the starter switch and improve space utilization.

[0032] After the return spring 14 is externally mounted, its travel needs to be limited. The general procedure is as follows: Figure 2 As shown, the baffle is welded to the moving iron core, but the weld joint is susceptible to impact and tensile forces during operation, posing a risk of fatigue fracture. In this embodiment, however, the annular flange and the moving iron core 11 are designed as a single integral structure, with one end of the return spring 14 abutting against the annular flange. This integral design eliminates the need for weld joints, fundamentally removing the risk of fatigue fracture, improving the reliability and service life of the starter switch, and reducing the failure rate caused by weld joint breakage.

[0033] In some embodiments, one end of the moving iron core 11 is provided with a cavity, and a limiting ring 15 is fixedly provided at the port of the cavity. A pull rod 13 is provided in the cavity, one end of which passes through the limiting ring 15 and moves coaxially relative to the moving iron core 11. A meshing spring 12 is sleeved on the pull rod 13, one end of which abuts against the baffle of the pull rod 13, and the other end abuts against the limiting ring 15.

[0034] When the resistance of the starter transmission mechanism is high, the pull rod 13 will encounter significant resistance during the pulling process, at which point the engagement spring 12 will be compressed. Since the pull rod 13 can move axially relative to the moving iron core 11, the compression of the engagement spring 12 will not hinder the continued upward movement of the moving iron core 11. Under the action of electromagnetic attraction, the moving iron core 11 continues to move upward until the push rod 9 pushes the contact copper plate 5 to reliably connect with contact bolts 1 and 2, ensuring circuit continuity. This structural design allows the starter switch to adapt to different starter transmission mechanism resistance conditions, ensuring reliable circuit continuity even under high transmission mechanism resistance, enabling the starter to start normally.

[0035] On the other hand, during the lightweight design of the starter switch, the overall axial dimension of the switch is shortened due to the external placement of the reset spring 14. In this embodiment, the pull rod 13 can move axially relative to the moving iron core 11. When the moving iron core 11 moves under the action of electromagnetic attraction, the pull rod 13 can be axially displaced relative to the moving iron core 11 according to the actual situation, thereby compensating for the impact of the shortened overall axial dimension of the starter switch, ensuring that the pull rod 13 can effectively pull the starter transmission mechanism and ensure the normal operation of the starter.

[0036] In some embodiments, the switch cover 3 and the switch housing 7, the limit ring 15 and the port of the cavity, and the coil 10 and the switch housing 7 are all fixed by riveting.

[0037] The riveting and fixing between the switch cover 3 and the switch housing 7, the limit ring 15 and the cavity port, and the coil 10 and the switch housing 7 can significantly improve the connection strength between these components, form a good sealing structure, prevent dust, moisture and other impurities from entering the switch, and ensure the electrical sealing of the switch.

[0038] In some embodiments, the contact copper plate 5 moves axially along the push rod 9, and an overtravel spring 8 is sleeved on the outside of the push rod 9. One end of the overtravel spring 8 is connected to the contact copper plate 5, and the other end is connected to the moving iron core 11.

[0039] The moving iron core 11 drives the push rod 9 to move together. The push rod 9 pushes the contact copper plate 5 to move axially against the elastic force of the overtravel spring 8, so that the contact copper plate 5 contacts the contact bolt 1 and the contact bolt 2, thus realizing the conduction of the circuit. The overtravel spring 8 can absorb the impact force of the moving iron core 11 on the contact copper plate 5 when it moves, reducing the wear between the contact copper plate 5 and the contact bolts; on the other hand, the elastic potential energy stored in the overtravel spring 8 can be released when the switch is subsequently opened, pushing the contact copper plate 5 to move in the opposite direction along the axial direction of the push rod 9.

[0040] In some embodiments, the contact copper plate 5 is connected to the insulating bushing 6, and the contact copper plate 5 is axially movably connected to the push rod 9 through the insulating bushing 6; the end of the push rod 9 is connected to the insulating gasket 4, and the insulating gasket 4 abuts against the insulating bushing 6 to limit the maximum stroke of the overtravel spring 8.

[0041] The insulating bushing 6 isolates the contact copper plate 5 and the push rod 9, preventing potential electrical short circuits between them. Furthermore, it allows the contact copper plate 5 to move axially relative to the push rod 9, ensuring that the contact copper plate 5 can flexibly contact and separate from the contact bolt under the force of the overtravel spring 8.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lightweight starter switch, characterized in that, Includes the switch body and the moving iron core assembly; The switch body includes a switch cover (3) and a switch housing (7) connected to the switch cover (3); the switch cover (3) is connected with a contact bolt one (1) and a contact bolt two (2), and a coil (10) is provided inside the switch housing (7); The moving iron core assembly includes a moving iron core (11), a push rod (9) connected to one end of the moving iron core (11), and a pull rod (13) connected to the other end of the moving iron core (11). The push rod (9) is connected to a contact copper plate (5). The moving iron core (11) is movably disposed on the switch housing (7), and one end extends out of the outside of the switch housing (7); the outside of the moving iron core (11) is provided with an annular flange integrally formed therewith; the return spring (14) is sleeved on the moving iron core (11) and located outside the switch housing (7); one end of the return spring (14) abuts against the outer wall of the switch housing (7), and the other end abuts against the annular flange.

2. The lightweight starter switch according to claim 1, characterized in that, One end of the moving iron core (11) is provided with a cavity, and a limiting ring (15) is fixedly provided at the port of the cavity. The pull rod (13) is provided in the cavity, and one end of the pull rod passes through the limiting ring (15) and moves coaxially relative to the moving iron core (11). The pull rod (13) is fitted with a meshing spring (12), one end of the meshing spring (12) abuts against the baffle of the pull rod (13), and the other end abuts against the limiting ring (15).

3. A lightweight starter switch according to claim 2, characterized in that, The switch cover (3) and the switch housing (7), the limiting ring (15) and the port of the cavity, and the coil (10) and the switch housing (7) are all fixed by riveting.

4. A lightweight starter switch according to claim 1, characterized in that, The contact copper plate (5) moves axially along the push rod (9). An overtravel spring (8) is sleeved on the outside of the push rod (9). One end of the overtravel spring (8) is connected to the contact copper plate (5), and the other end is connected to the moving iron core (11).

5. A lightweight starter switch according to claim 4, characterized in that, The contact copper plate (5) is connected to the insulating bushing (6), and the contact copper plate (5) is axially connected to the push rod (9) through the insulating bushing (6); the end of the push rod (9) is connected to the insulating pad (4), and the insulating pad (4) abuts against the insulating bushing (6) to limit the maximum stroke of the overtravel spring (8).

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