A starter with temperature protection function

Abstract

The utility model provides a kind of starter with temperature protection function, including brush holder bottom plate, several brush boxes being set on the brush holder bottom plate and cover being set on the brush box, electric brush is installed in the brush box, temperature switch corresponding with any brush box is installed on the back 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 stop working;Any brush box is recessed to form limit recess in the end towards the back cover, one end of the temperature switch passes through the back cover and is placed in the limit recess, and the temperature switch temperature sensing surface is close to the outer surface of the electric brush;A kind of starter with temperature protection function provided by the utility model overcomes the defect that existing starter lacks temperature protection function, leading 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 function. 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 with temperature protection function, overcoming the defect of existing starters that lack temperature protection function and are therefore prone to damage.

[0007] (II) Technical Solution

[0008] To solve the aforementioned technical problem, this utility model provides a starter with temperature protection function, including a brush holder base plate, a plurality of brush boxes disposed on the brush holder base plate, and a rear cover covering the brush boxes. Each brush box contains an electric brush, and the rear cover is equipped with a temperature switch corresponding to any brush box. The temperature switch is connected to the starter control and is used to control the starter to stop working when the temperature of the electric brush reaches a preset first threshold. Each brush box has a recessed end facing the rear cover forming a limiting groove. One end of the temperature switch passes through the rear cover and is placed within the limiting groove, with the temperature-sensing surface of the temperature switch close to the outer surface of the electric brush.

[0009] In some embodiments, the bottom of the limiting groove is symmetrically provided with support plates at intervals, a temperature-sensing gap is formed between the two support plates, and the temperature-sensing surface abuts against the support plates.

[0010] In some embodiments, the temperature switch is fitted with a sealing plug, which is fixed to the rear cover.

[0011] In some embodiments, the sealing plug is provided with an annular groove, and the rear cover is provided with an annular locking portion that engages with the annular groove.

[0012] In some embodiments, the annular card portion has a perforation inside, and the sealing plug has a tapered portion on one side of the annular card slot to facilitate its passage through the perforation.

[0013] In some embodiments, lead posts are symmetrically arranged on the outer end of the tapered portion, and the connecting wire of the temperature switch passes through the lead posts and is led out to the outside of the rear cover.

[0014] In some embodiments, the system further includes a stator assembly and a rotor assembly rotatably mounted within the stator assembly, wherein the brush holder base plate and the rear cover are 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, with the temperature sensing surface of the switch close to the outer surface of the brush. This allows for accurate and rapid monitoring of the brush temperature. When the temperature reaches the first threshold, the starter motor is promptly stopped to prevent problems such as insulation material failure, short circuits, and starter motor burnout caused by excessive heat. This effectively extends the starter motor's lifespan and reduces maintenance costs. When the brush temperature drops to the second threshold, the temperature switch controls the starter motor to restart, ensuring that the starter motor can continue to be used after the temperature returns to normal, without affecting the vehicle's normal starting needs. This improves the convenience and stability of the starter motor.

[0020] 2) The limiting groove on the brush box provides precise positioning for the temperature switch. The support plate and temperature sensing gap design at the bottom ensure that the temperature sensing surface is stably pressed against the support plate, which not only ensures that the temperature switch is firmly installed, but also optimizes the temperature sensing effect and ensures the accuracy and reliability of temperature monitoring.

[0021] 3) The temperature switch outer sleeve is sealed and engages with the annular part of the rear cover through the annular groove, which effectively prevents external dust, moisture and other substances from entering the starter, avoiding affecting the performance of the temperature switch or causing damage to the internal components of the starter, thus enhancing the overall protection performance of the starter.

[0022] 4) The difference between the first threshold and the second threshold can preferably be 20°C, so that the recovery time will not be long due to the high temperature of the installation environment, which will affect the use and make it highly practical. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a perspective view of the connection between the brush box and the temperature switch in a starter motor with temperature protection function according to this utility model.

[0025] Figure 2 This is a schematic diagram of the connection between the brush box and the temperature switch in a starter motor with temperature protection function according to this utility model;

[0026] Figure 3 This is an exploded view of the connection between the brush box and the temperature switch in a starter motor with temperature protection function according to this utility model.

[0027] Figure 4 This is a perspective view of the connection between the temperature switch and the sealing plug in a starter motor with temperature protection function according to this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of a starter motor with temperature protection function according to this utility model;

[0029] Figure 6 This is a schematic diagram of the structure of a starter motor with temperature protection function from another perspective according to this utility model;

[0030] Figure 7 This is a simplified schematic diagram of a starter circuit control system with temperature protection function according to this utility model.

[0031] The component names corresponding to the various labels in the figure are as follows: 1. Brush holder base plate; 101. Limiting groove; 102. Support plate; 103. Temperature sensing gap; 2. Brush box; 3. Rear cover; 301. Annular retaining part; 4. Brush; 5. Temperature switch; 501. Temperature sensing surface; 502. Connecting wire; 6. Sealing plug; 601. Annular retaining groove; 602. Conical part; 603. Lead post; 7. Stator assembly; 701. Housing; 8. Rotor assembly; 9. Fastening screw; 10. Relay; 11. Electromagnetic switch; 12. Starter; 13. Battery; 14. Main switch; 15. Vehicle switch. 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 1-7 As shown, this utility model provides a starter with temperature protection function, including a brush holder base plate 1, several brush boxes 2 disposed on the brush holder base plate 1, and a rear cover 3 covering the brush boxes 2. There are four brush boxes 2, which are evenly spaced along the circumference on the brush holder base plate 1. Each brush box 2 is equipped with an electric brush 4. A temperature switch 5 corresponding to any brush box 2 is installed on the rear cover 3. The temperature switch 5 is connected to the starter control and is used to control the starter to stop working when the temperature of the electric brush 4 reaches a preset first threshold. A limiting groove 201 is formed by recessing one end of any brush box 2 facing the rear cover 3. The limiting groove 201 is circular and matches the outer contour of the temperature switch 5. One end of the temperature switch 5 passes through the rear cover 3 and is placed in the limiting groove 201, and the temperature sensing surface 501 of the temperature switch 5 is close to the outer surface of the electric brush 4.

[0038] This structure features a temperature switch installed at the brush location, where the starter motor generates the most and fastest heat. The temperature sensor surface of the switch is close to the outer surface of the brush, enabling precise and rapid monitoring of the brush temperature. When the temperature reaches the first threshold, the starter motor is promptly stopped, preventing problems such as insulation material failure, short circuits, and starter motor burnout caused by excessive temperature. This effectively extends the starter motor's service life and reduces maintenance costs.

[0039] In some embodiments, such as Figure 2 and Figure 3As shown, the bottom of the limiting groove 201 is symmetrically and spaced apart with support plates 202, which are integral with the brush box 2. A temperature sensing gap 203 is formed between the two support plates 202, the width of which is adapted to the width of the brush 4. The temperature sensing surface 501 rests against the support plate 202 and faces the brush 4. In this structure, the limiting groove on the brush box provides precise positioning for the temperature switch, and the design of the support plate and temperature sensing gap at the bottom ensures that the temperature sensing surface is stably pressed against the support plate. This ensures that the temperature switch is firmly installed and optimizes the temperature sensing effect, ensuring the accuracy, timeliness, and reliability of temperature monitoring.

[0040] In some embodiments, such as Figure 1 , Figure 3 and Figure 5 As shown, a sealing plug 6 is fitted over the temperature switch 5, and the sealing plug 6 is fixed to the rear cover 3. The sealing plug 6 has an annular groove 601, and the rear cover 3 has an annular locking part 301 that engages with the annular groove 601. In this structure, the sealing plug fits over the temperature switch and engages with the annular locking part of the rear cover through the annular groove, thereby limiting the temperature switch 5 so that it is firmly pressed against the limiting groove 201, ensuring a secure and stable installation. Furthermore, the sealing plug 6 effectively prevents external dust, moisture, etc., from entering the starter motor, avoiding these factors from affecting the performance of the temperature switch or causing damage to internal starter components, thus enhancing the overall protective performance of the starter motor.

[0041] In some embodiments, such as Figures 3 to 5 As shown, the annular locking part 301 has a perforation inside, and the sealing plug 6 has a tapered part 602 on one side of the annular locking groove 601 to facilitate its passage through the perforation. The sealing plug 6 is made of rubber, and the tapered part 602 facilitates the sealing plug 6 to pass through the back cover 3 and allows the annular locking part 301 to be engaged in the annular locking groove 601, thus facilitating the installation of the sealing plug 6.

[0042] In some embodiments, such as Figures 3 to 5 As shown, lead posts 603 are symmetrically arranged on the outer end of the tapered part 602. The connecting wire 502 of the temperature switch 5 passes through the lead post 603 and is led out to the outside of the rear cover 3.

[0043] In some embodiments, such as Figures 3 to 6 As shown, the starter also includes a stator assembly 7 and a rotor assembly 8 rotatably mounted within the stator assembly 7. Both the stator assembly 7 and the rotor assembly 8 are existing technologies and will not be described in detail in this embodiment. The brush holder base plate 1 and the rear cover 3 are located at the rear end of the stator assembly 7; the rear cover 3 is fixedly connected to the housing 701 of the stator assembly 7 by a plurality of fastening screws 9.

[0044] In some embodiments, such as Figures 5 to 7As shown, a relay 10 and an electromagnetic switch 11 are installed on the housing 701. The electromagnetic switch 11 is used to control the starter motor to work or stop. The relay 10 and the temperature switch 5 work together to control the electromagnetic switch 11 to close or open.

[0045] like Figure 7 As shown, the battery 13, main switch 14, and solenoid switch 11 are connected in series in the main circuit. Relay 10 is connected in series in the control circuit of solenoid switch 11. Temperature switch 5 and vehicle switch 15 are connected in series in the control circuit of relay 10. Under normal operating conditions, when main switch 14, vehicle switch 15, and temperature switch 5 are closed, relay 10 is closed, which in turn controls solenoid switch 11 to close, and starter 12 begins to work. When temperature switch 5 detects that the temperature of brush 4 reaches a preset first threshold, temperature switch 5 is opened, the control circuit of relay 10 is disconnected, relay 10 is disconnected, and the control circuit of solenoid switch 11 is disconnected, solenoid switch 11 is disconnected, and starter 12 stops working.

[0046] In some embodiments, when the temperature of the brush 4 drops to a preset second threshold, the temperature switch 5 controls the starter motor to start working; both the first and second thresholds are fixed values ​​that can be selected and set according to actual needs. With this structure, when the brush temperature drops to the second threshold, the temperature switch controls the starter motor to restart, ensuring that the starter motor can continue to be used after the temperature returns to normal, without affecting the normal starting needs 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 time due to high ambient temperature affecting usability, thus demonstrating high practicality.

[0047] 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.

[0048] 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 function, comprising a brush holder base plate (1), a plurality of brush boxes (2) disposed on the brush holder base plate (1), and a rear cover (3) covering the brush boxes (2), wherein brushes (4) are installed inside the brush boxes (2), characterized in that: A temperature switch (5) corresponding to any brush box (2) is installed on the rear cover (3). The temperature switch (5) is connected to the starter control and is used to control the starter to stop working when the temperature of the brush (4) reaches a preset first threshold. One end of any brush box (2) facing the rear cover (3) is recessed to form a limiting groove (201). One end of the temperature switch (5) passes through the rear cover (3) and is placed in the limiting groove (201). The temperature sensing surface (501) of the temperature switch (5) is close to the outer surface of the brush (4).

2. The starter motor with temperature protection function according to claim 1, characterized in that: The bottom of the limiting groove (201) is symmetrically provided with support plates (202) at intervals, and a temperature sensing gap (203) is formed between the two support plates (202). The temperature sensing surface (501) abuts against the support plate (202).

3. The starter motor with temperature protection function according to claim 1, characterized in that: The temperature switch (5) is covered with a sealing plug (6), which is fixed to the rear cover (3).

4. The starter motor with temperature protection function according to claim 3, characterized in that: The sealing plug (6) is provided with an annular groove (601), and the rear cover (3) is provided with an annular locking part (301) that engages with the annular groove (601).

5. The starter motor with temperature protection function according to claim 4, characterized in that: The annular card portion (301) has a perforation inside, and the sealing plug (6) has a tapered portion (602) on one side of the annular card groove (601) to facilitate its passage through the perforation.

6. The starter motor with temperature protection function according to claim 5, characterized in that: The outer end of the tapered part (602) is symmetrically provided with lead posts (603), and the connecting wire (502) of the temperature switch (5) passes through the lead post (603) and is led out to the outside of the rear cover (3).

7. The starter motor with temperature protection function according to claim 1, characterized in that: It also includes a stator assembly (7) and a rotor assembly (8) rotatably mounted in the stator assembly (7), the brush holder base plate (1) and the rear cover (3) being located at the rear end of the stator assembly (7); the rear cover (3) is fixedly connected to the housing (701) of the stator assembly (7) by a plurality of fastening screws (9).

8. The starter motor with temperature protection function according to claim 7, characterized in that: A relay (10) and an electromagnetic switch (11) are installed on the housing (701). The electromagnetic switch (11) is used to control the starter to work or stop. The relay (10) and the temperature switch (5) cooperate to control the electromagnetic switch (11) to close or open.

9. The starter motor with temperature protection function according to claim 1, characterized in that: When the temperature of the brush (4) drops to a preset second threshold, the temperature switch (5) controls the starter to start working.

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