An auxiliary cooling system for automotive starter motors

Abstract

This invention discloses an auxiliary cooling system for an automotive starter motor, comprising a starter motor body, a fixed base externally connected to the starter motor body, a sleeve internally fixedly connected to the fixed base, and a first heat sink rotatably connected to the sleeve. This belongs to the technical field of automotive starter motors. In this auxiliary cooling system, when a servo motor starts rotating forward, an annular brush moves from one side of the first heat sink to the other, automatically cleaning the outer side of the first heat sink to prevent dust from affecting the cooling effect. Subsequently, the first and second heat sinks unfold, and the servo motor starts rotating in reverse, causing the first heat sink to rotate and retract, covering the outside of the starter motor body, preventing dust and mud from adhering. Then, the annular brush returns to its initial position, automatically cleaning the outer side of the first heat sink again to prevent excessive dust and mud from affecting the cooling effect.

Description

Technical Field

[0001] This invention relates to the field of automotive starter motor technology, and more specifically, to an auxiliary cooling system for automotive starter motors. Background Technology

[0002] The car starter motor, or "starter motor" for short, is the core component of the car engine starting system. Its function is to convert the electrical energy of the battery into mechanical energy, which drives the engine flywheel to rotate through the drive gear, thus enabling the engine to ignite and start.

[0003] The starter motor is a key component in starting an engine. During operation, it uses a high-speed electric motor to rotate the engine crankshaft, generating a significant amount of heat. Because its operation is short, typically lasting only a few seconds per start, its cooling design differs from that of a continuously operating motor. Traditional starter motors often use cast iron or aluminum alloy housings, materials with good thermal conductivity, allowing the heat generated during operation to be directly dissipated into the surrounding air. The housing surface also features simple heat sinks to increase the contact area with the air and accelerate heat dissipation. However, since these heat sinks are integrally molded with the starter motor housing, dust and dirt can easily accumulate in the gaps between the heat sinks due to the starter motor's operating environment, gradually blocking airflow and ultimately reducing the heat dissipation effect of the heat sinks. Therefore, we provide an auxiliary cooling system for automotive starter motors. Summary of the Invention

[0004] The purpose of this invention is to provide an auxiliary cooling system for automotive starter motors to solve the problems mentioned in the background section.

[0005] In some traditional starter motors, the heat sink and the starter motor housing are integrally molded. Due to the influence of the starter motor's working environment, dust, mud, and water can easily adhere to the gaps in the heat sink, gradually blocking the airflow channels and ultimately causing the heat sink to lose its heat dissipation effect.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An auxiliary cooling system for an automotive starter motor includes a starter motor body. A fixed base is fixedly connected to the outside of the starter motor body. A sleeve is fixedly connected inside the fixed base. A first heat sink is fitted onto the outside of the sleeve and is rotatably connected to the sleeve. A cleaning mechanism is provided outside the first heat sink to automatically clean it. A storage groove is provided inside the first heat sink, and a second heat sink is slidably connected inside the storage groove. A rotating rod is rotatably connected inside the sleeve. Rotating plates are fixedly connected to the outside of the rotating rod on both sides of the second heat sink. A connecting shaft is rotatably connected to the inside of the rotating plate away from the rotating rod and is fixedly connected to the second heat sink. A housing is fixedly connected to the outside of the starter motor body, and a transmission mechanism is provided inside the housing.

[0008] Preferably, the first heat sink, the storage slot, and the second heat sink are all arc-shaped structures. The arc-shaped first heat sink and the second heat sink can fit more closely to the starter motor body after being folded up, and multiple first heat sinks and second heat sinks can cover the outside of the starter motor body.

[0009] Preferably, the cleaning mechanism includes an annular mounting plate, which is sleeved on the outside of the starter motor body and fixedly connected to the starter motor body. An annular brush plate is sleeved on the outside of the starter motor body and between the annular mounting plate and the housing. The annular brush plate is used in conjunction with the first heat sink. A lead screw is rotatably connected to the outside of the annular mounting plate near the annular brush plate. There are two lead screws, which are symmetrically distributed. The lead screws penetrate the annular brush plate vertically and extend into the interior of the housing. The lead screws are rotatably connected to the housing. The annular brush plate is threadedly connected to the lead screws. The annular brush plate can automatically clean the retracted first heat sink.

[0010] Preferably, the annular brush plate is slidably connected to a guide rod inside. One end of the guide rod is fixedly connected to the annular mounting plate, and the other end of the guide rod is fixedly connected to the housing. There are four guide rods in total, which are symmetrically distributed and limit the position of the annular brush plate.

[0011] Preferably, the transmission mechanism includes a servo motor, which is fixedly connected to the housing. The output shaft of the servo motor passes vertically through the housing and extends into the interior of the housing. The output shaft of the servo motor is rotatably connected to the housing. A first gear is fixedly connected to the output end of the servo motor. A second gear is fixedly connected to the outer side of the lead screw near the first gear. A third gear is rotatably connected inside the housing and located between the second gear and the first gear. Both the first gear and the second gear are meshed with the third gear. The two lead screws are symmetrically distributed about the axis of the housing. When the servo motor drives the first gear to rotate, the first gear can drive the two lead screws to rotate synchronously through the third gear and the second gear. The two synchronously rotating lead screws drive the annular brush plate to move.

[0012] Preferably, a fourth gear is rotatably connected inside the housing, and a fifth gear is fixedly connected to the outer end of the rotating rod near the fourth gear. The fifth gear meshes with the fourth gear. A rotating shaft is rotatably connected inside the housing, and a swing plate is fixedly connected to the outer side of the rotating shaft away from the fourth gear. A sector gear is fixedly connected to the outer side of the rotating shaft near the fourth gear. An internal gear ring is fixedly connected inside the fourth gear, and the internal gear ring meshes with the sector gear. When the fourth gear rotates, it can drive the rotating rod to rotate through the fifth gear.

[0013] Preferably, a transmission plate is fixedly connected to the outside of the swing plate, and a sliding groove is opened inside the transmission plate. A sliding rod is slidably connected inside the sliding groove. One of the third gears is fixedly connected to the sliding rod. When the third gear rotates, it will drive the sliding rod to make a circular motion. When the sliding rod begins to press against the inner wall of the sliding groove, the sliding rod will drive the sector gear to rotate through the transmission plate and the swing plate.

[0014] Preferably, both the transmission plate and the slide groove are arc-shaped structures. The center of the arc-shaped transmission plate can coincide with the center of one of the third gears. When the third gear drives the slide rod to rotate, the slide rod will only slide inside the slide groove and will not squeeze the inner wall of the slide groove. The outer wall of the slide rod is in contact with the inner wall of the slide groove. The slide rod and the slide groove reduce the gap through tight contact, ensuring that the slide rod slides stably along a fixed trajectory inside the slide groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1) When this automotive starter motor auxiliary cooling system is in use, the servo motor starts rotating forward, driving the first gear to rotate. The first gear drives the lead screw to rotate through the third and second gears. The lead screw drives the annular brush plate to move, so that the annular brush plate moves from one side of the first heat sink to the other side. The annular brush plate automatically cleans the outside of the first heat sink to prevent dust from affecting the heat dissipation effect. Then the first and second heat sinks unfold to dissipate heat from the starter motor body. After the heat dissipation is completed, the servo motor starts rotating in reverse, so that the second heat sink retracts into the first heat sink. At the same time, it drives the first heat sink to rotate and retract. Multiple sets of first heat sinks cover the outside of the starter motor body, eliminating the gaps between the first heat sinks and preventing dust and mud from adhering. Then the annular brush plate also returns to its initial position and automatically cleans the outside of the first heat sink again to prevent excessive dust and mud from affecting the heat dissipation effect.

[0017] 2) When this automotive starter motor auxiliary cooling system is in use, the rotation of the third gear will drive the slide bar from one end of the slide groove to the other end. The slide bar will press against the inner wall of the slide groove, and through the transmission plate and the swing plate, it will drive the sector gear to rotate. The sector gear will drive the fourth gear to rotate through the internal gear ring. The fourth gear will drive the rotating rod to rotate through the fifth gear. The rotating rod will drive the rotating plate to rotate. The rotating plate will drive the first heat sink to rotate and unfold through the fixed connecting shaft. At the same time, it will drive the second heat sink to extend out from the first heat sink, increasing the contact area with the air and improving the heat dissipation effect. Under the action of the first heat sink and the second heat sink, the starter motor body will be cooled.

[0018] 3) When this automotive starter motor auxiliary cooling system is in use, there are two lead screws that drive the annular brush plate to move. These two lead screws are symmetrically distributed about the axis of the housing. The servo motor drives the first gear to rotate, and the first gear can drive the two lead screws to rotate synchronously through the third gear and the second gear. The two synchronously rotating lead screws drive the annular brush plate to move, preventing the annular brush plate from jamming due to uneven force. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the first heat sink of the present invention when it is unfolded;

[0020] Figure 2 This is a schematic diagram of the servo motor of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the first heat sink of the present invention when it is retracted;

[0022] Figure 4 This is a schematic diagram of the structure of the third gear of the present invention;

[0023] Figure 5This is a schematic diagram of the transmission plate of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the annular mounting plate of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of the annular brush plate of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of the first heat sink of the present invention.

[0027] The following are the labeling instructions in the diagram: 1. Starter motor body; 2. Fixed base; 3. Sleeve; 4. First heat sink; 5. Storage slot; 6. Second heat sink; 7. Rotating rod; 8. Rotating plate; 9. Connecting shaft; 10. Housing; 11. Transmission mechanism; 1101. Servo motor; 1102. First gear; 1103. Second gear; 1104. Third gear; 1105. Fourth gear; 1106. Fifth gear; 1107. Rotating shaft; 1108. Swing plate; 1109. Sector gear; 1110. Internal gear ring; 1111. Transmission plate; 1112. Slide groove; 1113. Slide rod; 12. Cleaning mechanism; 1201. Annular mounting plate; 1202. Annular brush plate; 1203. Lead screw; 1204. Guide rod. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1 to 8An auxiliary cooling system for an automotive starter motor includes a starter motor body 1, a fixed base 2 externally connected to the starter motor body 1, a sleeve 3 internally fixedly connected to the fixed base 2, a first heat sink 4 externally fitted to the sleeve 3, the first heat sink 4 rotatably connected to the sleeve 3, a cleaning mechanism 12 externally provided for cleaning the first heat sink 4, a storage groove 5 internally provided for the first heat sink 4, a second heat sink 6 slidably connected to the storage groove 5, a rotating rod 7 rotatably connected internally to the sleeve 3, rotating plates 8 fixedly connected externally to the rotating rod 7 on both sides of the second heat sink 6, a connecting shaft 9 rotatably connected to the side of the rotating plate 8 away from the rotating rod 7, the connecting shaft 9 fixedly connected to the second heat sink 6, and a housing 10 externally fixedly connected to the starter motor body 1, a transmission mechanism 11 internally provided for controlling the unfolding and retraction of the first heat sink 4 and the second heat sink 6.

[0030] Furthermore, the first heat sink 4, the storage groove 5, and the second heat sink 6 are all arc-shaped structures. The arc-shaped first heat sink 4 and the second heat sink 6 can fit more closely to the starter motor body 1 after being folded up. Multiple first heat sinks 4 and second heat sinks 6 can cover the outside of the starter motor body 1 to prevent dust from directly adhering to the starter motor body 1. If necessary, a ring-shaped protective mesh can be installed on the outside of the second heat sink 6 to prevent foreign objects (such as internal automotive cables) from touching the second heat sink 6.

[0031] Furthermore, the cleaning mechanism 12 includes an annular mounting plate 1201, which is sleeved on the outside of the starter motor body 1 and fixedly connected to the starter motor body 1. An annular brush plate 1202 is sleeved on the outside of the starter motor body 1 and located between the annular mounting plate 1201 and the housing 10. The annular brush plate 1202 is used in conjunction with the first heat sink 4. A lead screw 1203 is rotatably connected to the outside of the annular mounting plate 1201 near the annular brush plate 1202. There are two lead screws 1203, which are symmetrically distributed. The lead screws 1203 vertically penetrate the annular brush plate 1202 and extend into the inside of the housing 10. The lead screws 1203 are rotatably connected to the housing 10. The annular brush plate 1202 is threadedly connected to the lead screws 1203. The annular brush plate 1202 can automatically clean the retracted first heat sink 4 to prevent excessive dust from adhering to the outside of the first heat sink 4 and affecting the heat dissipation effect.

[0032] Furthermore, a guide rod 1204 is slidably connected inside the annular brush plate 1202. One end of the guide rod 1204 is fixedly connected to the annular mounting plate 1201, and the other end of the guide rod 1204 is fixedly connected to the housing 10. There are four guide rods 1204 in total, which are symmetrically distributed. The guide rods 1204 limit the movement of the annular brush plate 1202, making the movement of the annular brush plate 1202 more stable.

[0033] Furthermore, the transmission mechanism 11 includes a servo motor 1101, which is fixedly connected to the housing 10. The output shaft of the servo motor 1101 vertically penetrates the housing 10 and extends into the interior of the housing 10. The output shaft of the servo motor 1101 is rotatably connected to the housing 10. A first gear 1102 is fixedly connected to the output end of the servo motor 1101. A second gear 1103 is fixedly connected to the outer side of the lead screw 1203 near the first gear 1102. The second gear 1103 is rotatably connected inside the housing 10 and located between the second gear 1103 and the first gear 1102. There is a third gear 1104, and the first gear 1102 and the second gear 1103 are both meshed with the third gear 1104. The two lead screws 1203 are distributed symmetrically about the axis of the housing 10. When the servo motor 1101 drives the first gear 1102 to rotate, the first gear 1102 can drive the two lead screws 1203 to rotate synchronously through the third gear 1104 and the second gear 1103. The two synchronously rotating lead screws 1203 drive the annular brush plate 1202 to move, preventing the annular brush plate 1202 from jamming due to uneven force.

[0034] Furthermore, a fourth gear 1105 is rotatably connected inside the housing 10, and a fifth gear 1106 is fixedly connected to the outer end of the rotating rod 7 near the fourth gear 1105. The fifth gear 1106 meshes with the fourth gear 1105. A rotating shaft 1107 is rotatably connected inside the housing 10, and a swing plate 1108 is fixedly connected to the outer side of the rotating shaft 1107 away from the fourth gear 1105. A sector gear 1109 is fixedly connected to the outer side of the rotating shaft 1107 near the fourth gear 1105. An internal gear ring 1110 is fixedly connected inside the fourth gear 1105, and the internal gear ring 1110 meshes with the sector gear 1109. When the fourth gear 1105 rotates, it can drive the rotating rod 7 to rotate through the fifth gear 1106. The rotating rod 7 then drives the first heat sink 4 to automatically unfold or retract through the rotating plate 8.

[0035] Furthermore, a transmission plate 1111 is fixedly connected to the outside of the swing plate 1108. A sliding groove 1112 is provided inside the transmission plate 1111. A sliding rod 1113 is slidably connected inside the sliding groove 1112. One of the third gears 1104 is fixedly connected to the sliding rod 1113. When the third gear 1104 rotates, it will drive the sliding rod 1113 to make a circular motion. When the sliding rod 1113 begins to press against the inner wall of the sliding groove 1112, the sliding rod 1113 will drive the sector gear 1109 to rotate through the transmission plate 1111 and the swing plate 1108, so that the sector gear 1109 will drive the fourth gear 1105 to rotate through the internal gear ring 1110.

[0036] Furthermore, both the transmission plate 1111 and the slide groove 1112 are arc-shaped structures. The center of the arc-shaped transmission plate 1111 can coincide with the center of one of the third gears 1104. When the third gear 1104 drives the slide rod 1113 to rotate, the slide rod 1113 will only slide inside the slide groove 1112 and will not squeeze the inner wall of the slide groove 1112. The outer wall of the slide rod 1113 fits against the inner wall of the slide groove 1112. The close fit between the slide rod 1113 and the slide groove 1112 reduces the gap, ensuring that the slide rod 1113 slides stably along a fixed trajectory in the slide groove 1112, avoiding shaking or deviation. At the same time, the contact surface can transmit force more evenly.

[0037] The usage steps of this invention are as follows: When the automotive starter motor auxiliary cooling system is in use, the servo motor 1101 starts rotating forward, driving the first gear 1102 to rotate. The first gear 1102 drives the lead screw 1203 to rotate through the third gear 1104 and the second gear 1103. The lead screw 1203 drives the annular brush plate 1202 to move, so that the annular brush plate 1202 moves from one side of the first heat sink 4 to the other side, and automatically cleans the outer side of the first heat sink 4 through the annular brush plate 1202 to prevent dust from affecting the heat dissipation effect. During the rotation of the third gear 1104, it drives the slide rod 1113 to perform a circular motion until the slide rod 1113 moves from one end of the slide groove 1112 to the other end. At this time, the slide rod 1113 begins to press the inner wall of the slide groove 1112, thereby driving the sector gear 1109 to rotate through the transmission plate 1111 and the swing plate 1108. The sector gear 1109 drives the fourth gear 1105 to rotate via the internal gear ring 1110. The fourth gear 1105 drives the rotating rod 7 to rotate via the fifth gear 1106. The rotating rod 7 drives the rotating plate 8 to rotate. The rotating plate 8 drives the first heat sink 4 to rotate and unfold via the fixed connecting shaft 9. At the same time, it drives the second heat sink 6 to extend from the first heat sink 4, increasing the contact area with the air and improving the heat dissipation effect. Under the action of the first heat sink 4 and the second heat sink 6, the starter motor body 1 is cooled. After the cooling is completed, the servo motor 1101 starts to reverse, so that the second heat sink 6 retracts into the first heat sink 4. At the same time, it drives the first heat sink 4 to rotate and retract. Multiple sets of first heat sinks 4 cover the outside of the starter motor body 1. Then the annular brush plate 1202 also returns to the initial position and automatically cleans the outside of the first heat sink 4 again.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary cooling system for an automotive starter motor, comprising a starter motor body (1), wherein a mounting base (2) is fixedly connected to the outside of the starter motor body (1), characterized in that: The fixed base (2) is fixedly connected to the inside of the sleeve (3), and the outside of the sleeve (3) is fitted with a first heat sink (4). The first heat sink (4) is rotatably connected to the sleeve (3). A cleaning mechanism (12) is provided outside the first heat sink (4). A storage groove (5) is opened inside the first heat sink (4). A second heat sink (6) is slidably connected inside the storage groove (5). A rotating rod (7) is rotatably connected inside the sleeve (3). A rotating plate (8) is fixedly connected to the outside of the rotating rod (7) and to the corresponding two sides of the second heat sink (6). A connecting shaft (9) is rotatably connected to the inside of the rotating plate (8) on the side away from the rotating rod (7). The connecting shaft (9) is fixedly connected to the second heat sink (6). A housing (10) is fixedly connected to the outside of the starter motor body (1). A transmission mechanism (11) is provided inside the housing (10). The cleaning mechanism (12) includes an annular mounting plate (1201), which is sleeved on the outside of the starter motor body (1). The annular mounting plate (1201) is fixedly connected to the starter motor body (1). An annular brush plate (1202) is sleeved on the outside of the starter motor body (1) and between the annular mounting plate (1201) and the housing (10). The annular brush plate (1202) is used in conjunction with the first heat sink (4). A lead screw (1203) is rotatably connected to the outer side of the mounting plate (1201) near the annular brush plate (1202). There are two lead screws (1203), which are symmetrically distributed. The lead screw (1203) vertically penetrates the annular brush plate (1202) and extends into the interior of the housing (10). The lead screw (1203) is rotatably connected to the housing (10), and the annular brush plate (1202) is threadedly connected to the lead screw (1203). The transmission mechanism (11) includes a servo motor (1101), which is fixedly connected to the housing (10). The output shaft of the servo motor (1101) passes vertically through the housing (10) and extends into the interior of the housing (10). The output shaft of the servo motor (1101) is rotatably connected to the housing (10). A first gear (1102) is fixedly connected to the output end of the servo motor (1101). A second gear (1103) is fixedly connected to the outside of the lead screw (1203) on the side close to the first gear (1102). A third gear (1104) is rotatably connected inside the housing (10) and between the second gear (1103) and the first gear (1102). The first gear (1102) and the second gear (1103) are both meshed with the third gear (1104).

2. The auxiliary cooling system for an automotive starter motor according to claim 1, characterized in that: The first heat sink (4), the storage slot (5), and the second heat sink (6) are all arc-shaped structures.

3. The auxiliary cooling system for an automotive starter motor according to claim 1, characterized in that: The annular brush plate (1202) is internally slidably connected with a guide rod (1204). One end of the guide rod (1204) is fixedly connected to the annular mounting plate (1201), and the other end of the guide rod (1204) is fixedly connected to the housing (10). There are four guide rods (1204) in total, and the four guide rods (1204) are symmetrically distributed.

4. The auxiliary cooling system for an automotive starter motor according to claim 1, characterized in that: The housing (10) is rotatably connected to a fourth gear (1105). The outer end of the rotating rod (7) near the fourth gear (1105) is fixedly connected to a fifth gear (1106). The fifth gear (1106) meshes with the fourth gear (1105). The housing (10) is rotatably connected to a rotating shaft (1107). The outer side of the rotating shaft (1107) away from the fourth gear (1105) is fixedly connected to a swing plate (1108). The outer side of the rotating shaft (1107) near the fourth gear (1105) is fixedly connected to a sector gear (1109). The fourth gear (1105) is fixedly connected to an internal gear ring (1110). The internal gear ring (1110) meshes with the sector gear (1109).

5. The auxiliary cooling system for an automotive starter motor according to claim 4, characterized in that: The swing plate (1108) is externally fixedly connected to a transmission plate (1111), and the transmission plate (1111) has a sliding groove (1112) inside. A sliding rod (1113) is slidably connected inside the sliding groove (1112), and one of the third gears (1104) is fixedly connected to the sliding rod (1113).

6. The auxiliary cooling system for an automotive starter motor according to claim 5, characterized in that: The transmission plate (1111) and the slide groove (1112) are both arc-shaped structures, and the outer wall of the slide rod (1113) is in contact with the inner wall of the slide groove (1112).

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