Electromagnetic switch and starter
By introducing the coordination of the adjusting cylinder and the spring into the electromagnetic switch, the spring is pre-deformed to increase the rebound force, which solves the problem of insufficient initial velocity of the moving iron core, realizes rapid disengagement, avoids gear damage and electromagnetic switch failure, and enhances the reliability of the electromagnetic switch.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-03-20
AI Technical Summary
When the existing electromagnetic switch drives the starter gear to mesh with the engine gear, the initial velocity of the moving iron core is insufficient, resulting in delayed disengagement and easy occurrence of gear chipping or wear.
By introducing the cooperation of the adjusting cylinder and the spring in the electromagnetic switch, the spring is deformed in advance by rotating the adjusting cylinder, which increases the deformation of the spring and enhances the rebound force of the moving iron core, thereby increasing its initial velocity when disengaging. The sealing ring prevents external substances from entering the housing.
This effectively avoids gear breakage caused by slow disengagement speed of the drive gear, protects the gear, and prevents electromagnetic switch failure due to environmental factors, thus improving reliability and durability.
Smart Images
Figure CN224020694U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of starters, and more particularly to electromagnetic switches and starters. Background Technology
[0002] The starter motor, also called a motor, converts electrical energy from the battery into mechanical energy to drive the engine gears to rotate and start the engine. The solenoid switch, a crucial component of the starter motor, engages the starter motor's drive gear with the engine gears and then disengages it after the engine has started. However, because the engine rotates rapidly after starting, it's essential to quickly disengage the starter motor's drive gear to prevent gear grinding or increased wear due to delayed disengagement.
[0003] In existing electromagnetic switches, when the starter gear meshes with the engine gear, the movable iron core is driven by the energized coil to compress the spring. At this time, the force on the spring is small, and the deformation of the spring is also small. Therefore, when the coil is not activated, the initial velocity of the movable iron core when it disengages from the engine gear due to the spring's rebound force is also small. This results in the starter's drive gear not disengaging from the engine gear in time, causing tooth knocking between the starter and the engine gear. Utility Model Content
[0004] One advantage of this invention is that it provides an electromagnetic switch and a starter motor. The cooperation between the spring and the adjusting cylinder allows the spring to deform to a certain extent before the electromagnetic switch is activated by rotating the adjusting cylinder. Then, the electromagnetic component is activated and the movable iron core moves, causing the spring to continue to deform. This increases the degree of spring deformation and ultimately increases the initial velocity of the movable iron core when it disengages from the engine gear due to the spring's rebound force. This avoids gear breakage caused by a slow disengagement speed of the drive gear, thus preventing damage to the drive gear due to gear breakage.
[0005] Another advantage of this invention is that it provides an electromagnetic switch and a starter, wherein one end of the spring abuts against the adjusting cylinder and the other end abuts against the movable iron core, and the deformation of the spring changes with the position of the adjusting cylinder relative to the housing. This invention can change the deformation of the spring by stretching or compressing it, and further, it can achieve the speed of spring reset by increasing the deformation of the spring.
[0006] The other advantage of the utility model lies in providing electromagnetic switch and starter, the sealing ring that each setting between the shell and the adjusting cylinder and between the escape hole and the iron core shaft can seal the shell inside, thereby avoid the liquid or dust of outside to enter the shell inside, further avoid the liquid or dust of outside to cause the damage of coil or other components, and avoid the movable iron core from rusting due to the internal environment damp, finally lead to the situation of the electromagnetic switch from failing to work due to the fault.
[0007] In order to achieve the above at least one advantage of the utility model, the utility model provides electromagnetic switch, including:
[0008] A shell;
[0009] An adjusting cylinder, the adjusting cylinder is movably arranged in the shell along the axial direction of the shell;
[0010] A movable iron core, the movable iron core is movably arranged in the shell along the axial direction of the shell, and one end of the movable iron core is inserted into the adjusting cylinder;
[0011] A spring, one end of the spring is in abutment with the adjusting cylinder, and the other end is in abutment with the movable iron core, and the deformation amount of the spring changes with the position change of the adjusting cylinder relative to the shell;
[0012] An electromagnetic assembly, the electromagnetic assembly is arranged in the shell to drive the movement of the movable iron core.
[0013] According to the above electromagnetic switch, the movable iron core includes an iron core shaft and an iron core boss, and the iron core boss is arranged at one end of the iron core shaft towards the adjusting cylinder.
[0014] According to the above electromagnetic switch, the adjusting cylinder forms a containing cavity along the axial direction thereof, and the containing cavity has an opening and a plane side wall.
[0015] According to the above electromagnetic switch, one end of the spring is in abutment with the opening of the containing cavity, and the other end is in abutment with one end of the iron core boss towards the opening of the containing cavity.
[0016] According to the above electromagnetic switch, one end of the spring is in abutment with the plane side wall of the containing cavity, and the other end is in abutment with one end of the iron core boss towards the plane side wall of the containing cavity.
[0017] According to the above electromagnetic switch, the electromagnetic assembly includes two coils, and the two coils are arranged in the containing cavity and cover the movable iron core, and the axis of the coil is collinear with the axis of the movable iron core.
[0018] According to the electromagnetic switch, the adjusting cylinder and the shell are threadedly connected, the outer edge surface of the adjusting cylinder is formed with a screw thread, and the shell is formed with a thread groove matched with the screw thread.
[0019] According to the electromagnetic switch, the shell is formed with an avoiding hole communicated with the inside of the shell at each end in the axial direction.
[0020] According to the electromagnetic switch, the shell and the adjusting cylinder are provided with a sealing ring, and the avoiding hole is also provided with a sealing ring between the hole wall and the core shaft.
[0021] Meanwhile, the utility model also provides a starter, including any one of the above-mentioned electromagnetic switch. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 It is the axonometric view of the utility model.
[0023] Figure 2 It is the full section axonometric view of the utility model.
[0024] Figure 3 It is the utility model Figure 2 The enlarged view of A in the utility model. DETAILED DESCRIPTION
[0025] The following description is used to disclose the utility model so that those skilled in the art can realize the utility model. The preferred embodiments in the following description are only as examples, and other obvious modifications can be thought by those skilled in the art. The basic principles defined in the following description can be applied to other implementation, modification, improvement, equivalent and other technical solutions without departing from the spirit and scope of the utility model.
[0026] Those skilled in the art should understand that, in the disclosure of the utility model, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation of the utility model.
[0027] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.
[0028] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection or can intercommunication;Can be direct connection, also can indirectly connect through intermediate medium, can be two element internal communication or two element mutual action relation. For ordinary skilled person in the art, the above terms can be understood according to the specific meaning in the utility model.
[0029] According to the accompanying Figure 1 to the accompanying Figure 3 As shown in the electromagnetic switch and starter of a preferred embodiment of the utility model will be described in detail below, wherein the electromagnetic switch includes a housing 10, an adjusting cylinder 20, a movable iron core 30, a spring 40 and an electromagnetic assembly 50.
[0030] Specifically, the housing 10 forms a mounting cavity 101 along the extension direction of its axis.
[0031] Specifically, the adjusting cylinder 20 is movably arranged in the mounting cavity 101 along the axis direction of the housing 10.
[0032] Specifically, the movable iron core 30 is movably arranged in the mounting cavity 101 along the axis direction of the housing 10, and one end of the movable iron core 30 is inserted into the adjusting cylinder 20.
[0033] Specifically, the movable iron core 30 includes an iron core shaft 31 and an iron core boss 32, and the iron core boss 32 is arranged at one end of the iron core shaft 31 towards the adjusting cylinder 20.
[0034] Preferably, the iron core shaft 31 and the housing 10 are in sliding connection.
[0035] Specifically, the adjusting cylinder 20 forms an accommodating cavity 201 along its axis direction, and the accommodating cavity 201 has an opening 20101 and a planar side wall 2011.
[0036] Specifically, one end of the spring 40 abuts against the adjusting cylinder 20, and the other end abuts against the movable iron core 30, and the deformation amount of the spring 40 changes with the position change of the adjusting cylinder 20 relative to the housing 10.
[0037] Preferably, one end of the spring 40 abuts against the opening 20101 of the accommodating cavity 201, and the other end abuts against one end of the iron core boss 32 towards the opening 20101 of the accommodating cavity 201.
[0038] Preferably, one end of the spring 40 abuts against the planar side wall 2011 of the accommodating cavity 201, and the other end abuts against one end of the planar side wall 2011 of the accommodating cavity 201 facing the core boss 32.
[0039] It is understood by those skilled in the art that the spring 40 can be in a stretched state or in a compressed state to increase the elastic force of the spring 40 on the movable core 30 in the initial state.
[0040] When the spring 40 is in a stretched state, the spring 40 is located between the opening 20101 and the core boss 32, so that, during adjustment, only the distance between the opening 20101 of the adjusting cylinder 20 and the core boss 32 needs to be increased to make the spring 40 located between the opening 20101 and the core boss 32 in a stretched state, thereby increasing the elastic force of the spring 40 on the movable core 30 in the initial state, and increasing the rebound speed of the movable core 30 after the spring 40 is further stretched.
[0041] When the spring 40 is in a compressed state, the spring 40 is located between the core boss 32 and the planar side wall 2011, so that, during adjustment, only the distance between the opening 20101 of the adjusting cylinder 20 and the core boss 32 needs to be reduced to make the spring 40 located between the opening 20101 and the core boss 32 in a compressed state, thereby increasing the elastic force of the spring 40 on the movable core 30 in the initial state, and increasing the initial speed of the movable core 30 driven by the elastic force of the spring 40 to disengage from the engine gear.
[0042] Preferably, the material of the movable core 30 is a magnet compatible with the electromagnetic assembly 50.
[0043] Specifically, the electromagnetic assembly 50 is arranged in the mounting cavity 101 to drive the movement of the core shaft 31 in the movable core 30.
[0044] More specifically, the electromagnetic assembly 50 comprises two coils 51, which are arranged in the accommodating cavity 201 and cover the movable iron core 30, and the axis of the coils 51 is in line with the axis of the movable iron core 30. Preferably, the two coils 51 can be arranged as holding coils and pulling coils respectively. It can be understood by those skilled in the art that when the two coils 51 generate forces in the same direction after being energized, the movable iron core 30 moves and gradually extends into the adjusting cylinder 20, and the movable iron core 30 extends into the adjusting cylinder 20 to stretch or compress the spring 40 again, so that the spring 40 is deformed again, and at the same time, the movable iron core 30 starts the engine through other components.
[0045] When the two coils 51 generate forces in opposite directions and cancel each other out after being energized, the movable iron core 30 is only subjected to the action of the spring 40, so the movable iron core 30 is quickly pulled back to the original position under the reaction force of the deformed spring 40. It can be understood that before the coils 51 are energized, the spring 40 has already deformed a certain amount under the rotation of the adjusting cylinder 20, so after the two coils 51 drive the movable iron core 30 to continue deforming the spring 40 by a certain amount, the deformation of the spring 40 is greatly improved compared with existing electromagnetic switches, so after the two coils 51 no longer drive the movable iron core 30 to move, the spring 40 can pull the movable iron core 30 back to the original position at a faster speed.
[0046] Specifically, the iron core shaft 31 extends out of the avoiding hole at the end away from the iron core boss 32 and is connected with the driving component 60 of the starter.
[0047] Specifically, the driving component 60 comprises a driving motor 61, a one-way clutch 62, a driving gear 63 and a yoke 64. The driving motor 61 is arranged on the lower side of the shell 10 and connected with the shell 10. The one-way clutch 62 is arranged on the output end of the driving motor 61 in a relatively slidable manner. The driving gear 63 is arranged at the end of the one-way clutch 62 away from the driving motor 61. The yoke 64 is connected with the end of the iron core shaft 31 extending out of the avoiding hole in a slidable manner, the lower end of the yoke 64 is connected with the one-way clutch 62 or the driving gear 63 in a slidable manner, and the middle part of the yoke 64 is hinged to the shell 10.
[0048] The skilled in the art can understand that when the iron core shaft 31 is deformed by the coil 51, the adjusting cylinder 20 drives the upper end of the yoke 64 to swing towards the adjusting cylinder 20, thereby driving the lower end of the yoke 64 to swing away from the adjusting cylinder 20, and further driving the drive gear 63 to move away from the adjusting cylinder 20 until the drive gear 63 is engaged with the gear on the engine. At this time, the drive motor 61 rotates at a slow speed, and the drive gear 63 also rotates at a slow speed, so that the engagement of the drive gear 63 and the engine gear is smooth, reducing gear impact and wear. Then, the drive motor 61 increases in speed and finally starts the engine.
[0049] After the engine is started, the drive gear 63 needs to be disengaged from the engagement with the engine gear in time. At this time, the actions of the two coils 51 on the iron core shaft 31 cancel each other out, and the iron core shaft 31 is only subjected to the reaction force of the spring 40. At this time, the deformation amount of the spring 40 is greatly improved compared with the existing electromagnetic switch, so that the spring 40 can quickly drive the drive gear 63 to disengage from the engagement with the high-speed rotating engine gear through the movable iron core 30, thereby avoiding the tooth impact of the drive gear 63 due to the slow disengagement speed, and further avoiding the damage of the drive gear 63 due to the tooth impact.
[0050] Preferably, the housing 10 is provided with two escape holes at both ends of the axis direction, which are communicated with the mounting cavity 101. More preferably, the housing 10 and the adjusting cylinder 20 are provided with sealing rings, and the hole wall of the escape hole and the iron core shaft 31 are also provided with sealing rings. That is, the sealing rings can improve the airtightness between the housing 10 and the adjusting cylinder 20, thereby avoiding the entry of external liquid or dust into the housing 10, and further avoiding the damage of the coil 51 or other components caused by the external liquid or dust, and avoiding the rusting of the movable iron core 30 due to the humid internal environment, and finally avoiding the failure of the electromagnetic switch due to the rusting.
[0051] Preferably, the relative movement between the adjusting cylinder 20 and the shell 10 can be one of screw connection, oil cylinder or air cylinder. As an example, the adjusting cylinder 20 and the shell 10 are screw connected, the outer edge surface of the adjusting cylinder 20 is formed with screw thread, and the mounting cavity 101 of the shell 10 is formed with thread groove matched with the screw thread. Those skilled in the art can understand that the screw connection not only facilitates the user to adjust the relative position of the adjusting cylinder 20 and the shell 10 by rotating, thereby adjusting the deformation amount of the spring 40, so as to improve the elastic force of the movable iron core 30 in the initial state, but also has self-locking function, so as to realize the relative fixation of the adjusting cylinder 20 and the shell 10, and prevent the relative position of the adjusting cylinder 20 and the shell 10 from being displaced.
[0052] Further preferably, the end of the adjusting cylinder 20 away from the opening 20101 extends out of the avoiding hole and forms an adjusting part, and the adjusting part is formed with a plurality of anti-skid grooves distributed along the circumferential direction of the adjusting cylinder 20. Those skilled in the art can understand that the anti-skid grooves can improve the friction between the user's hand and the adjusting cylinder 20, thereby improving the convenience of the user's adjustment.
[0053] Those skilled in the art should understand that the above description and the embodiments of the utility model shown in the drawings are only examples and do not limit the utility model. The advantages of the utility model have been completely and effectively realized. The function and structural principle of the utility model have been shown and explained in the embodiments, and the embodiments of the utility model can be deformed or modified in any way without departing from the principle.
Claims
1. An electromagnetic switch, characterized in that, include: A shell; An adjusting cylinder is disposed on the housing and is movable relative to the housing along the axial direction of the housing. A movable iron core is disposed on the housing in a way that allows it to move relative to the housing axis, and one end of the movable iron core is inserted into the adjusting cylinder; A spring, one end of which abuts against the adjusting cylinder and the other end of which abuts against the movable iron core, wherein the deformation of the spring changes with the position of the adjusting cylinder relative to the housing; An electromagnetic component is disposed in the housing to drive the movement of the movable iron core.
2. The electromagnetic switch according to claim 1, characterized in that, The movable iron core includes an iron core shaft and an iron core boss, with the iron core boss located at the end of the iron core shaft facing the adjusting cylinder.
3. The electromagnetic switch according to claim 1, characterized in that, The regulating cylinder forms a receiving cavity along its axial direction, the receiving cavity having an opening and a planar sidewall.
4. The electromagnetic switch according to claim 3, characterized in that, One end of the spring abuts against the opening of the receiving cavity, and the other end abuts against the end of the iron core boss facing the opening of the receiving cavity.
5. The electromagnetic switch according to claim 3, characterized in that, One end of the spring abuts against the planar sidewall of the receiving cavity, and the other end abuts against the end of the iron core boss facing the planar sidewall of the receiving cavity.
6. The electromagnetic switch according to claim 1, characterized in that, The electromagnetic component includes two coils, which are disposed within a receiving cavity and cover the movable iron core. The axis of the coils and the axis of the movable iron core are collinear.
7. The electromagnetic switch according to claim 1, characterized in that, The adjusting cylinder and the housing are threadedly connected, with threads formed on the outer edge of the adjusting cylinder and a threaded groove formed inside the housing that mates with the threads.
8. The electromagnetic switch according to claim 1, characterized in that, Each end of the housing along its axial direction forms a clearance hole that communicates with its interior.
9. The electromagnetic switch according to claim 2, characterized in that, A sealing ring is provided between the housing and the adjusting cylinder, and a sealing ring is also provided between the wall of the clearance hole and the iron core shaft.
10. A starter motor, characterized in that, include: The electromagnetic switch as described in any one of claims 1-9.