A starter with temperature protection

Abstract

The utility model provides a kind of starter with temperature protection, including rear cover and the brush holder bottom plate fixed in the rear cover, the brush holder bottom plate side away from the rear cover is equipped with several electric brushes, temperature switch corresponding to any electric brush is installed between the other side of the brush holder bottom plate and the rear cover, the temperature switch is connected with starter control, for when the temperature of the electric brush reaches preset first threshold value, control the starter stops working;The inner wall of the rear cover is concave and is formed with the limiting groove corresponding to the temperature switch, one end of the temperature switch is placed in the limiting groove, and the temperature sensing surface at the other end is placed on the wall surface of the brush holder bottom plate;The utility model provides a kind of starter with temperature protection, overcomes the defect that existing starter lacks temperature protection function and leads to starter easy to damage.

Description

Technical Field

[0001] This utility model relates to the field of starter technology, specifically to a starter with temperature protection. Background Technology

[0002] As a core component of the automotive engine starting system, the starter motor is responsible for converting the electrical energy from the battery into mechanical energy, thereby driving the engine crankshaft to rotate and achieving the crucial task of starting the engine. Because the starter motor is a short-duty device, under normal circumstances, each start-up operation lasts for a short period, and the heat generated by the starter motor can be dissipated quickly without seriously affecting its performance and lifespan.

[0003] However, in actual use, many external factors may interfere with the normal working mode of the starter motor. For example, in cold weather, the viscosity of the engine oil increases, and the starting resistance increases. Users may need to try to start the starter motor multiple times or for a long time to successfully start the car. Or, when the engine malfunctions, users may repeatedly start the starter motor to try to troubleshoot the problem, which may cause the starter motor to remain in working condition for a long time.

[0004] Prolonged operation of a starter motor causes its temperature to rise rapidly. The starter motor contains a large amount of insulating material, whose physical and chemical properties gradually deteriorate under high temperatures, eventually leading to insulation failure. Once the insulation fails, a short circuit can easily occur in the starter motor's internal circuitry. This short circuit further exacerbates abnormal current flow, generating a large amount of heat, which may ultimately burn out the starter motor. This not only severely affects the normal use of the vehicle and increases repair costs, but also may cause other safety problems due to starter motor failure, bringing great inconvenience and potential risks to the user. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of this, the present invention provides a starter motor with temperature protection, overcoming the defect of existing starter motors lacking temperature protection function, which leads to easy damage to the starter motor.

[0007] (II) Technical Solution

[0008] To solve the aforementioned technical problem, this utility model provides a starter motor with temperature protection, including a rear cover and a brush holder base plate fixed inside the rear cover. A plurality of brushes are mounted on the side of the brush holder base plate opposite to the rear cover. A temperature switch corresponding to any one of the brushes is mounted between the other side of the brush holder base plate and the rear cover. The temperature switch is connected to the starter motor control and is used to control the starter motor to stop working when the temperature of the brush reaches a preset first threshold. A limiting groove corresponding to the temperature switch is formed recessed in the inner wall of the rear cover. One end of the temperature switch is placed in the limiting groove, and the temperature-sensing surface of its other end abuts against the wall surface of the brush holder base plate.

[0009] In some embodiments, the temperature switch is fitted with a fixing seat that is adapted to the limiting groove, and the fixing seat is placed inside the limiting groove.

[0010] In some embodiments, one end of the temperature switch is provided with a limiting part, and the fixing base is provided with a contour groove adapted to the limiting part; the lower end and both sides of the contour groove are provided with openings.

[0011] In some embodiments, the limiting part is provided with a limiting body and lugs symmetrically arranged on both sides of the limiting body, and the fixing seat includes a cylindrical body that can be fitted onto the limiting body and protrusions symmetrically arranged on both sides of the cylindrical body, the protrusions being fitted onto the lugs.

[0012] In some embodiments, the cylindrical body and the protrusion are an integral structure.

[0013] In some embodiments, the brush holder base plate is fixedly connected to the rear cover by a plurality of fastening screws, and a plurality of brush boxes are arranged in a ring at equal intervals on the brush holder base plate, and the electric brush is installed in the corresponding brush box; one end of the electric brush abuts against the brush holder base plate.

[0014] In some embodiments, the system further includes a stator assembly and a rotor assembly rotatably mounted within the stator assembly, with the rear cover and the brush holder base plate located at the rear end of the stator assembly; the rear cover is fixedly connected to the housing of the stator assembly by a plurality of fastening screws.

[0015] In some embodiments, a relay and an electromagnetic switch are installed on the housing. The electromagnetic switch is used to control the starter motor to work or stop. The relay and the temperature switch cooperate to control the electromagnetic switch to close or open.

[0016] In some embodiments, when the temperature of the brush drops to a preset second threshold, the temperature switch controls the starter to start working.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least:

[0019] 1) A temperature switch is installed at the brush location, where the starter motor generates the most and fastest heat. The temperature switch is positioned between the brush holder base plate and the rear cover, corresponding to the brush. The temperature sensing surface rests against the wall of the brush holder base plate, allowing for precise and rapid sensing of the brush temperature. When the temperature reaches the first threshold, the starter motor is stopped to prevent insulation failure and short circuits caused by excessive heat, which could burn out the starter motor. This effectively protects the starter motor, extends its service life, and reduces automotive maintenance costs. When the brush temperature drops to the second threshold, the temperature switch restarts the starter motor, ensuring it can continue to be used after the temperature returns to normal, without affecting the vehicle's normal starting needs. This improves the stability and convenience of starter motor use.

[0020] 2) The temperature switch is fitted with a mounting bracket, which is placed in the limiting groove, so that the temperature switch can be stably limited at the brush. The temperature switch has good installation stability and can still accurately sense the temperature in the vibration environment during the starter operation.

[0021] 3) The difference between the first threshold and the second threshold can preferably be 20°C, so that the long recovery time caused by the high temperature of the installation environment will not affect the use, and the practicality is high. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a perspective view of the connection between the rear cover and the brush holder base plate in a starter motor with temperature protection according to this utility model.

[0024] Figure 2 This is an exploded view of the rear cover, brush holder base plate, and temperature switch of a starter motor with temperature protection according to this utility model.

[0025] Figure 3 This is a perspective view of the connection between the rear cover, the mounting base, and the temperature switch in a starter motor with temperature protection according to this utility model.

[0026] Figure 4 This is a cross-sectional view of the connection between the rear cover, fixing seat, temperature switch and brush holder base plate in a starter motor with temperature protection according to this utility model.

[0027] Figure 5This is a perspective view of the connection between the brush, brush holder base plate and temperature switch in a starter motor with temperature protection according to this utility model.

[0028] Figure 6 This is a perspective view of the connection between the temperature switch and the mounting base in a starter motor with temperature protection according to this utility model.

[0029] Figure 7 This is an exploded view of the temperature switch and mounting base in a starter motor with temperature protection according to this utility model.

[0030] Figure 8 This is a simplified schematic diagram of the starter circuit control with temperature protection according to this utility model.

[0031] The component names corresponding to the various labels in the attached figures are: 1. Rear cover; 101. Limiting groove; 2. Brush holder base plate; 3. Brush; 4. Temperature switch; 401. Temperature sensing surface; 402. Limiting part; 403. Limiting body; 404. Lug; 5. Fixing base; 501. Contouring groove; 502. Columnar body; 503. Protrusion; 6. Brush box; 7. Relay; 8. Electromagnetic switch; 9. Battery; 10. Main switch; 11. Vehicle switch; 12. Starter motor. Detailed Implementation

[0032] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0033] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0035] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0036] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0037] Combination Figures 1-8 As shown, this utility model provides a starter motor with temperature protection, including a rear cover 1 and a brush holder base plate 2 fixed inside the rear cover 1. A plurality of brushes 3 are installed on the side of the brush holder base plate 2 away from the rear cover 1. A temperature switch 4 corresponding to any brush 3 is installed between the other side of the brush holder base plate 2 and the rear cover 1. The temperature switch 4 is connected to the starter motor control and is used to control the starter motor to stop working when the temperature of the brush 3 reaches a preset first threshold, thereby protecting the starter motor.

[0038] See Figure 2 , Figure 3 and Figure 5 The inner wall of the back cover 1 has a recessed groove 101 corresponding to the temperature switch 4. One end of the temperature switch 4 is placed in the recess 101, and the temperature sensing surface 401 of the other end of the temperature switch 4 abuts against the wall of the brush holder base plate 2.

[0039] This structure features a temperature switch installed at the brush location, where the starter motor generates the most and fastest heat. The temperature switch 4 is installed between the brush holder base plate 2 and the rear cover 1, with the temperature sensing surface 401 resting against the wall of the brush holder base plate 2, close to the brush 3. This allows for precise and rapid sensing of the brush 3's temperature. When the temperature reaches the first threshold, the starter motor can be stopped in time, preventing insulation material failure and short circuits due to excessive temperature, which could burn out the starter motor. This effectively protects the starter motor, extends its service life, and reduces automotive maintenance costs.

[0040] In some embodiments, such as Figure 3 and Figure 4 As shown, the temperature switch 4 is fitted with a mounting base 5 that matches the limiting groove 101, and the mounting base 5 is placed inside the limiting groove 101. In this structure, the temperature switch 4 is fitted with a mounting base 5 that matches the limiting groove 101. The limiting groove 101 and the mounting base 5 provide a stable limit for the temperature switch 4, allowing it to be firmly positioned at the brush. This results in good installation stability for the temperature switch, ensuring accurate temperature sensing even under vibration conditions during starter operation.

[0041] In some embodiments, such as Figure 6 and Figure 7 As shown, one end of the temperature switch 4 is provided with a limiting part 402, and the fixing base 5 is provided with a contoured groove 501 adapted to the limiting part 402. The contoured groove 501 has openings at its lower end and on both sides, through which the limiting part 402 can be inserted into the contoured groove 501. The limiting part 402 is provided with a limiting body 403 and lugs 404 symmetrically arranged on both sides of the limiting body 403. The fixing base 5 includes a cylindrical body 502 that can be fitted onto the limiting body 403 and protrusions 503 symmetrically arranged on both sides of the cylindrical body 502. The protrusions 503 can be fitted onto the lugs 404. This structure not only facilitates the installation of the temperature switch 4 and the fixing base 5, but also provides stable limiting for the temperature switch 4, ensuring its accurate position and improving the reliability and stability of temperature monitoring.

[0042] In some embodiments, such as Figure 7 As shown, the cylindrical body 502 and the protrusion 503 are an integral structure. This structure reduces the number of parts, improves the overall strength and stability of the mounting base 5, and reduces the risk of the temperature switch 4 being affected by loose parts.

[0043] In some embodiments, such as Figure 1 and Figure 2 As shown, the brush holder base plate 2 is fixedly connected to the rear cover 1 by multiple fastening screws, ensuring a stable and reliable connection. Multiple brush boxes 6 are arranged in a ring at equal intervals on the brush holder base plate 2, and electric brushes 3 are installed in the corresponding brush boxes 6; one end of the electric brush 3 rests against the brush holder base plate 2.

[0044] In some embodiments, the system further includes a stator assembly and a rotor assembly rotatably mounted within the stator assembly, with the rear cover 1 and brush holder base plate 2 located at the rear end of the stator assembly; the rear cover 1 is fixedly connected to the housing of the stator assembly by a plurality of fastening screws. Both the stator assembly and the rotor assembly are prior art and will not be described further in this embodiment.

[0045] In some embodiments, such as Figure 8As shown, a relay 7 and an electromagnetic switch 8 are installed on the housing. The electromagnetic switch 8 is used to control the starter motor to work or stop. The relay 7 and the temperature switch 4 work together to control the electromagnetic switch 8 to close or open. This structure makes the starter motor's temperature protection mechanism more scientific and reasonable, enabling it to respond to temperature changes in a timely and accurate manner, ensuring that the starter motor operates within a safe temperature range.

[0046] like Figure 8 As shown, the battery 9, main switch 10, and solenoid switch 8 are connected in series in the main circuit. Relay 7 is connected in series in the control circuit of solenoid switch 8, and temperature switch 4 and vehicle switch 11 are connected in series in the control circuit of relay 7. Under normal operating conditions, when main switch 10, vehicle switch 11, and temperature switch 4 are closed, relay 7 is closed, which in turn controls solenoid switch 8 to close, and starter 12 begins to work. When temperature switch 4 detects that the temperature of brush 3 reaches a preset first threshold, temperature switch 4 is opened, the control circuit of relay 7 is disconnected, relay 7 is disconnected, and the control circuit of solenoid switch 8 is disconnected, solenoid switch 8 is disconnected, and starter 12 stops working.

[0047] In some embodiments, when the temperature of the brush 3 drops to a preset second threshold, the temperature switch 4 controls the starter motor to start working. Both the first and second thresholds are fixed values ​​and can be selected and set according to actual needs. This structure ensures that the starter motor can continue to be used after the temperature returns to normal, without affecting the normal starting requirements of the vehicle, thus improving the convenience and stability of the starter motor. The difference between the first and second thresholds is preferably 20°C, avoiding the problem of long recovery times due to high ambient temperatures affecting usability, thus demonstrating high practicality.

[0048] In this specification, the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the descriptions of the embodiments described later are relatively simple, and relevant parts can be referred to the descriptions of the foregoing embodiments.

[0049] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A starter motor with temperature protection, comprising a rear cover (1) and a brush holder base plate (2) fixed inside the rear cover (1), wherein a plurality of brushes (3) are mounted on the side of the brush holder base plate (2) opposite to the rear cover (1), characterized in that: A temperature switch (4) corresponding to any brush (3) is installed between the other side of the brush holder base plate (2) and the rear cover (1). The temperature switch (4) is connected to the starter control and is used to control the starter to stop working when the temperature of the brush (3) reaches a preset first threshold. A limiting groove (101) corresponding to the temperature switch (4) is formed in the inner wall of the rear cover (1). One end of the temperature switch (4) is placed in the limiting groove (101), and the temperature sensing surface (401) of the other end abuts against the wall surface of the brush holder base plate (2).

2. The temperature-protected starter of claim 1, wherein: The temperature switch (4) is fitted with a fixing seat (5) that is compatible with the limiting groove (101), and the fixing seat (5) is placed inside the limiting groove (101).

3. The temperature-protected starter of claim 2, wherein: One end of the temperature switch (4) is provided with a limiting part (402), and the fixing seat (5) is provided with a contour groove (501) adapted to the limiting part (402); the lower end and both sides of the contour groove (501) are provided with openings.

4. The starter motor with temperature protection according to claim 3, characterized in that: The limiting part (402) is provided with a limiting body (403) and lugs (404) symmetrically arranged on both sides of the limiting body (403). The fixing seat (5) includes a cylindrical body (502) that can be fitted onto the limiting body (403) and protrusions (503) symmetrically arranged on both sides of the cylindrical body (502). The protrusions (503) can be fitted onto the lugs (404).

5. The starter motor with temperature protection according to claim 4, characterized in that: The cylindrical body (502) and the protrusion (503) are an integral structure.

6. The starter motor with temperature protection according to claim 1, characterized in that: The brush holder base plate (2) is fixedly connected to the rear cover (1) by multiple fastening screws. Multiple brush boxes (6) are arranged in a ring at equal intervals on the brush holder base plate (2). The electric brush (3) is installed in the corresponding brush box (6). One end of the electric brush (3) abuts against the brush holder base plate (2).

7. The starter motor with temperature protection according to claim 1, characterized in that: It also includes a stator assembly and a rotor assembly rotatably mounted within the stator assembly, wherein the rear cover (1) and the brush holder base plate (2) are located at the rear end of the stator assembly; the rear cover (1) is fixedly connected to the housing of the stator assembly by a plurality of fastening screws.

8. The starter motor with temperature protection according to claim 7, characterized in that: The housing is equipped with a relay (7) and an electromagnetic switch (8). The electromagnetic switch (8) is used to control the starter motor to work or stop. The relay (7) and the temperature switch (4) work together to control the electromagnetic switch (8) to close or open.

9. The starter motor with temperature protection according to claim 1, characterized in that: When the temperature of the brush (3) drops to a preset second threshold, the temperature switch (4) controls the starter to start working.

Images