Automobile starter capable of preventing coil electric leakage
By introducing an insulating guard into the excitation winding of the car starter, the magnetic poles are prevented from directly pressing on the coil winding, the problem of coil leakage is solved and the rationality of the installation structure of the starter is improved.
Patent Information
- Application Number
- CN202422068891.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-26
AI Technical Summary
During the assembly process of a car starter, the magnetic poles are easily crushed when locked by screws, causing the coil to leak and affecting the normal operation of the motor.
An excitation winding structure including an insulating guard plate is designed, and the magnetic poles pass through the insulating guard plate through screws rather than directly pressing on the coil winding, thereby avoiding the risk of crushing the insulating thin skin.
It effectively prevents coil leakage, improves the rationality of the installation structure of the starter, and even if the magnetic pole crushes the insulating protective plate, it will not affect the coil winding.
Smart Images
Figure CN223039742U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a motor starter for an automobile, in particular to a motor starter for an automobile that prevents coil leakage. Background Art
[0002] When an automobile engine starts, it needs to be driven by a DC motor. If a large torque output is required, a planetary gear assembly will be configured on the starter. Subsequently, an electromagnetic switch drives a fork to push a one-way clutch to output torque and drive the engine to operate. Generally, the electromagnetic switch is independently arranged on one side of the motor and is arranged parallel to the motor side by side. The motor structure consists of a casing, a stator, and a rotor. The stator includes an exciting winding and magnetic poles. The exciting winding is mainly composed of a copper coil wound in a spiral shape to form a coil winding in a runway shape. An insulating thin skin is provided on the outer wall of the copper coil for insulation between the copper coils. The magnetic poles are pressed on the coil winding by screws and are screwed to the casing. During the assembly process, when the magnetic poles are tightened by screwing, there is a situation where the insulating thin skin on the outer wall of the coil is broken, which causes coil leakage and affects the normal operation of the motor. Content of the Utility Model
[0003] To solve the above problems, the utility model provides a motor starter for an automobile that prevents coil leakage, aiming to avoid breaking the insulating thin skin of the coil when installing the magnetic poles and prevent coil leakage.
[0004] To achieve the above purpose, the utility model provides the following technical solution: A motor starter for an automobile that prevents coil leakage, including a housing, a motor, an electromagnetic component, a fork, a one-way clutch, and a planetary reducer are arranged inside the housing. The motor includes a casing, a stator, and a rotor. The stator includes an exciting winding and magnetic poles. The exciting winding includes a bracket and a coil winding formed by winding a copper coil in a spiral shape to form a coil winding in a runway shape. The coil windings are symmetrically installed in pairs on the bracket. An insulating thin skin is provided on the outer wall of the copper coil. Insulating shims are respectively attached to both sides of the end face of the coil winding. After the magnetic poles are pressed on the insulating shims, screws pass through the coil winding and are screwed to the casing.
[0005] The magnetic pole includes an arc-shaped pressing plate, and a positioning platform protrudes from the middle of the pressing plate. The coil winding is sleeved on the positioning platform, and the insulating shim is arranged between the coil winding sleeve and the pressing plate.
[0006] There are four coil windings, which are symmetrically installed in pairs on the bracket. A wire is installed on the bracket, and the wire is connected to the coil winding.
[0007] It further includes a planetary reducer. The motor shaft of the motor is in transmission connection with the planetary reducer. A one-way clutch is arranged on the output shaft of the planetary reducer. An output gear is arranged at the end of the one-way clutch. The inner hole wall of the one-way clutch and the output shaft of the planetary reducer are in slidable transmission connection through helical teeth. A limiting rubber sleeve is also arranged at the end of the output shaft of the planetary reducer.
[0008] The beneficial effect of the utility model is that since the magnetic pole presses on the insulating gasket and then is screwed to the machine shell through the screw passing through the coil winding, when the magnetic pole is installed, it will not directly press on the coil winding. In this way, it avoids damaging the insulating sheet on the coil winding during installation, resulting in its leakage. And even if the magnetic pole damages the insulating gasket, it will not affect the coil winding. In this way, the structural rationality of the starter installation is improved.
[0009] The following further describes the present utility model in conjunction with the drawings and specific embodiments. Description of the Drawings
[0010] Figure 1 It is a structural diagram of the specific embodiment of the present utility model;
[0011] Figure 2 It is a partial exploded view of the specific embodiment of the present utility model;
[0012] Figure 3 It is a developed view of the exciting winding in the specific embodiment of the present utility model;
[0013] Figure 4 It is a structural diagram of the installation state of the insulating gasket in the specific embodiment of the present utility model. Specific Embodiments
[0014] The following specifically describes the present utility model through examples, which are only used to further illustrate the present utility model and cannot be construed as a limitation on the protection scope of the present utility model.
[0015] Such as Figure 1 — Figure 4As shown in the figure, this embodiment discloses a car starter for preventing coil leakage, which includes a housing 1. Inside the housing 1, there are a motor 2, an electromagnetic assembly 3, a fork 4, a one-way clutch 5, and a planetary reducer 6. The electromagnetic assembly 3 drives the fork 4 to push the one-way clutch 5 for output. The motor 2 drives the planetary reducer 6 to reduce the speed and increase the torque to supply power to the one-way clutch for output. The motor 2 includes a motor housing 21, a stator 22, and a rotor 23. The stator 22 includes an exciting winding 7 and magnetic poles 8. The exciting winding 7 includes a bracket 71 and a coil winding 72 which is spirally wound by a copper coil into a runway shape. The coil windings 72 are symmetrically installed in pairs on the bracket 71. An insulating thin skin is provided on the outer wall of the copper coil. Insulating shims 9 are respectively pasted on both sides of the end face of the coil winding 72. After the magnetic poles 8 are pressed on the insulating shims 9, screws pass through the coil winding 72 and are screwed to the motor housing 21.
[0016] The magnetic poles 8 include an arc-shaped pressing plate 81. A positioning platform 82 protrudes from the middle of the pressing plate 81. The positioning boss matches the inner circle of the coil winding 72. The coil winding 72 is sleeved on the positioning platform 82 for positioning. The insulating shim 9 is arranged between the coil winding 72 sleeve and the pressing plate 81. This structure can ensure the reliable positioning of the coil winding 72, effectively prevent its position from moving, and improve the reliability of the structure.
[0017] There are four coil windings 72, which are symmetrically installed in pairs on the bracket 71. A wire is installed on the bracket 71 and is connected to the coil winding 72, thus forming a circle, making the magnetic field generated after power-on more balanced and improving the reliability of the rotor rotation.
[0018] It also includes a planetary reducer 6. The motor shaft of the motor 2 is in transmission connection with the planetary reducer 6. A one-way clutch 5 is configured on the output shaft 61 of the planetary reducer. An output gear 51 is arranged at the end of the one-way clutch 5. The inner hole wall of the one-way clutch 5 and the output shaft 61 of the planetary reducer are slidably connected by helical teeth. A limiting rubber sleeve 9 is also configured at the end of the output shaft 61 of the planetary reducer. The limiting rubber sleeve 9 has a certain elastic expansion and contraction. Through the limiting rubber sleeve 9, the fork 4 is limited when pushing the one-way clutch 5, so that the output gear 51 on the one-way clutch 5 can contact the large gear on the engine in a rotational output manner. If there is a collision with the large gear at the moment of contact, the small gear can obtain a certain path and rotation angle by squeezing the limiting rubber sleeve 9, making it better align with the tooth groove of the engine large gear and insert into the engagement.
[0019] With the above technical solution, since the magnetic pole 8 is pressed against the insulating gasket 9 and then screwed to the machine housing 21 through the screw passing through the coil winding 72, when the magnetic pole 8 is installed, it will not directly press on the coil winding 72. In this way, it is avoided that the insulating sheet on the coil winding 72 is damaged by the installation pressure, resulting in its leakage of electricity. And even if the magnetic pole 8 damages the insulating gasket 9, it will not affect the coil winding 72. In this way, the structural rationality of the starter installation is improved.
[0020] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For a person skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or essential characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.
[0021] In addition, it should be understood that although this specification is described according to the embodiments, not each embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. A person skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by a person skilled in the art.
Claims
1. An automobile starter for preventing coil leakage, comprising a housing, a motor is arranged in the housing, the motor comprises a housing, a stator, and a rotor, and is characterized in that: The stator includes an excitation winding and a magnetic pole. The excitation winding includes a bracket and a coil winding formed by spirally winding a copper coil in a runway shape. The coil windings are symmetrically installed in pairs on the bracket. An insulating thin skin is provided on the outer wall of the copper coil. Insulating protective sheets are respectively attached to both sides of the end surface of the coil winding. The magnetic pole is pressed on the insulating protective sheet and then screwed through the coil winding to the casing.
2. The automobile starter for preventing coil leakage according to claim 1, characterized in that: The magnetic pole comprises an arc-shaped pressing plate, a positioning platform is protruded in the middle of the pressing plate, the coil winding sleeve is arranged on the positioning platform, and the insulating protective sheet is arranged between the coil winding sleeve and the pressing plate.
3. The automobile starter with coil leakage prevention according to claim 1, characterized in that: There are four coil windings, which are symmetrically installed on the bracket in pairs. A wire is installed on the bracket, and the wire is connected to the coil windings.
4. The automobile starter for preventing coil leakage according to claim 1, characterized in that: It also includes a planetary reducer, the motor shaft of the motor is connected to the planetary reducer in driving connection, a one-way clutch is arranged on the output shaft of the planetary reducer, an output gear is arranged at the end of the one-way clutch, the inner hole wall of the one-way clutch and the output shaft of the planetary reducer are connected in a slidable manner through helical teeth, and a limiting rubber sleeve is also arranged at the end of the output shaft of the planetary reducer.