A brushed motor welding inverter heat dissipation structure

Abstract

This utility model relates to the field of motor heat dissipation technology, and discloses a heat dissipation structure for a brushed motor welded inverter. It includes a housing, with a heat dissipation mechanism installed at the rear end of the housing for cooling the brushed motor. A shielding mechanism is installed at the rear end of the outer wall of the housing to block dust. The heat dissipation mechanism includes a base plate installed at the rear end of the housing. Multiple threaded rods are installed at the top outer side of the base plate, and a threaded bracket is installed on the outer side of the base plate. In this utility model, the threaded bracket moves back and forth along the axial diameter of the threaded rods under the action of the threads, driving two top cooling fans to move, thus achieving mechanical heat dissipation of the brushed motor inverter welded structure. This solves the problem that when using mineral oil liquid cooling, an additional heating device is needed to maintain viscosity; otherwise, insufficient flow can easily lead to overheating of the device during startup.

Description

Technical Field

[0001] This utility model relates to the field of motor heat dissipation technology, and in particular to a brushed motor welding inverter heat dissipation structure. Background Technology

[0002] A brushed motor is a rotary electric motor that converts electrical energy from an external DC power source into mechanical energy through brushes contacting a commutator. Its structure includes a stator (permanent magnet or excitation winding), a rotor (armature winding), brushes, and a commutator. During operation, the brushes and commutator work together to continuously change the direction of the current in the rotor winding, causing the rotor to rotate under continuous force in the stator's magnetic field. It features high starting torque, simple control circuit, and low cost, and is widely used in power tools, toys, and small electric vehicles.

[0003] The welded inverter heat dissipation structure of a brushed motor is a functional combination structure that achieves reliable electrical connection of power devices in the inverter circuit through welding process and uses heat dissipation mechanism to dissipate heat to ensure stable operation of the motor drive system. Existing brushed motors use welding process to tightly connect power devices to heat sinks, and with forced liquid cooling system, the heat generated by the switching loss of power devices during the operation of the inverter circuit is quickly dissipated to ensure that the device temperature is maintained within a safe range and the system operates stably. However, the heat dissipation capacity of the coolant will decrease due to evaporation, and the aging of seals over a long period of use will cause water leakage, resulting in the risk of short circuit. Existing technology replaces water-based medium with non-conductive coolant and uses mineral oil for liquid cooling. However, mineral oil has a very high viscosity at low temperature and its fluidity will decrease sharply. During use, an additional heating device is required to maintain the viscosity. Otherwise, the device will overheat due to insufficient flow during startup. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a brushed motor welding inverter heat dissipation structure, which aims to improve the problem that when mineral oil is used for liquid cooling in the prior art, the viscosity of mineral oil is very high at low temperatures and the fluidity will drop sharply. Therefore, an additional heating device is required to maintain the viscosity during use. Otherwise, the device will overheat due to insufficient flow during startup.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a brushed motor welded inverter heat dissipation structure, comprising a housing, a heat dissipation mechanism installed at the rear end of the housing for dissipating heat from the brushed motor, and a shielding mechanism installed at the rear end of the outer wall of the housing for shielding dust; the heat dissipation mechanism includes a base plate installed at the rear end of the housing, a plurality of threaded rods installed at the top outer side of the base plate, a threaded frame installed on the outer side of the base plate, the outer walls of the plurality of threaded rods being threadedly connected to the inner wall of the bottom end of the threaded frame, cooling fans being fixedly connected to the top left and right sides of the outer wall of the threaded frame, and a drive assembly installed at the left outer end of the base plate.

[0006] As a further description of the above technical solution:

[0007] The drive assembly includes a servo motor, which is mounted on the outer left side of the base plate. The output end of the servo motor is fixedly connected to a drive shaft. The outer wall of the drive shaft is rotatably connected to the left end of the housing. Multiple bevel gears are fixedly connected to the outer wall of the drive shaft. Bevel gears are mounted on the rear side of the outer wall of each bevel gear. The rear side of the outer wall of the bevel gear is meshed with the left side of the outer wall of the bevel gear. The rear side of the outer wall of the bevel gear is fixedly connected to the front end of the outer wall of the threaded rod.

[0008] As a further description of the above technical solution:

[0009] The shielding mechanism includes a base, which is installed on the rear end of the outer wall of the housing. Supports are fixedly connected to both the left and right sides of the outer wall of the base. A rotating shaft is rotatably connected to the top of the outer wall of each support on the opposite side. Gear teeth are fixedly connected to the middle of the outer walls of multiple rotating shafts. A triangular knob is fixedly connected to the opposite end of the outer walls of multiple rotating shafts. A rack is installed at the bottom of the outer wall of each gear tooth, meshing with the top of the outer wall of the rack. The outer wall of the rack is slidably connected to the interior of the support. A fixing frame is fixedly connected to the rear end of the outer wall of the rack, and a baffle is fixedly connected to the outer wall of the fixing frame.

[0010] As a further description of the above technical solution:

[0011] Support plates are installed at both the front and rear ends of the outer wall of the threaded rod. The bottom of the outer wall of the multiple support plates is fixedly connected to the top of the outer wall of the base plate. The upper middle inner wall of the support plate is rotatably connected to the outer wall of the threaded rod.

[0012] As a further description of the above technical solution:

[0013] A bracket is installed on the left end of the outer wall of the housing, and the top of the outer wall of the bracket is fixedly connected to the bottom of the outer wall of the servo motor.

[0014] As a further description of the above technical solution:

[0015] The housing is fixedly connected to a heat dissipation fin, which is installed on the outer front end of the heat dissipation mechanism.

[0016] As a further description of the above technical solution:

[0017] A heat dissipation cover is fixedly connected to the rear end of the outer wall of the housing, and the heat dissipation cover is installed on the outer rear end of the heat dissipation mechanism.

[0018] As a further description of the above technical solution:

[0019] A load-bearing plate is installed on the bottom of the outer wall of the housing, and multiple screws are installed at equal intervals around the bottom of the housing. The housing is fixedly connected to the top of the load-bearing plate through the outer wall of the multiple screws.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the second bevel gear drives the threaded rod to rotate. Due to the rotational restriction of the threaded frame by the two threaded rods, the threaded frame moves back and forth along the axial diameter of the threaded rod under the action of the thread, which drives the two cooling fans at the top to move, thereby realizing mechanical heat dissipation of the brushed motor inverter welding structure. This solves the problem that when using mineral oil liquid cooling, the viscosity of mineral oil increases greatly at low temperatures and the fluidity decreases, requiring an additional heating device to maintain the viscosity. Otherwise, the device may overheat due to insufficient flow during startup.

[0022] 2. In this utility model, a fixing frame is welded to the rear end of the rack, and the outer side of the fixing frame is welded to the baffle. When the rack moves, the baffle moves back and forth under the stable support of the internal space of the bracket through the connecting action of the fixing frame. When the brushed motor stops running, the baffle is moved to the rear side of the heat dissipation cover, effectively blocking dust from entering the brushed motor through the internal space of the heat dissipation cover, preventing dust from accumulating and settling on the surface of the internal heat dissipation fins, and avoiding the temperature of the internal electronic components of the brushed motor from rising due to heat dissipation obstruction, thereby affecting its service life. Attached Figure Description

[0023] Figure 1 This is a front view of a brushed motor welding inverter heat dissipation structure proposed in this utility model;

[0024] Figure 2 This is a perspective view of a brushed motor welding inverter heat dissipation structure proposed in this utility model.

[0025] Figure 3 This is a side view of a brushed motor welding inverter heat dissipation structure proposed in this utility model;

[0026] Figure 4This is a structural exploded view of a brushed motor welding inverter heat dissipation structure proposed in this utility model;

[0027] Figure 5 This is a diagram illustrating the heat dissipation mechanism of a brushed motor welded inverter heat dissipation structure proposed in this utility model.

[0028] Figure 6 This is a schematic diagram of the shielding mechanism for a brushed motor welding inverter heat dissipation structure proposed in this utility model.

[0029] Legend:

[0030] 1. Housing; 2. Heat dissipation mechanism; 201. Base plate; 202. Support plate; 203. Threaded rod; 204. Threaded bracket; 205. Cooling fan; 206. Drive assembly; 2061. Servo motor; 2062. Bracket; 2063. Bevel gear one; 2064. Bevel gear two; 2065. Drive shaft; 3. Shielding mechanism; 301. Base; 302. Bracket; 303. Rack; 304. Gear teeth; 305. Fixing bracket; 306. Baffle; 307. Triangular knob; 308. Rotating shaft; 4. Heat dissipation cover; 5. Heat dissipation fins; 6. Load-bearing plate; 7. Screw. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1 , Figure 4 and Figure 5This utility model provides an embodiment of a brushed motor welding inverter heat dissipation structure, including a housing 1. A heat dissipation mechanism 2 is installed at the rear end of the housing 1 to dissipate heat from the brushed motor. A shielding mechanism 3 is installed at the rear end of the outer wall of the housing 1 to shield against dust. The heat dissipation mechanism 2 includes a base plate 201, which is installed at the rear end of the housing 1. Multiple threaded rods 203 are installed at the top outer side of the base plate 201, and a threaded bracket 204 is installed on the outer side of the base plate 201. The outer walls of the multiple threaded rods 203 are threadedly connected to the inner wall of the bottom end of the threaded bracket 204. Cooling fans 205 are fixedly connected to the left and right sides of the top of the outer wall of the threaded bracket 204. A drive assembly 206, including a servo motor 2061, is installed at the left outer side of the base plate 201. The output end of the servo motor 2061 is fixedly connected to a drive shaft 2065. The outer wall of the drive shaft 2065 is rotatably connected to the left end of the housing 1. Multiple bevel gears 1 2063 are fixedly connected to the outer wall of the drive shaft 2065. Bevel gears 2 2064 are installed on the rear side of the outer wall of each of the multiple bevel gears 1 2063. The rear side of the outer wall of the bevel gears 1 2063 meshes with the left side of the outer wall of the bevel gears 2 2064. The rear side of the outer wall of the bevel gears 2 2064 is fixedly connected to the front end of the outer wall of the threaded rod 203. Support plates 202 are installed on the front and rear ends of the outer wall of the threaded rod 203. The bottom of the outer wall of the multiple support plates 202 is fixedly connected to the top of the outer wall of the base plate 201. The upper middle inner wall of the support plate 202 is rotatably connected to the outer wall of the threaded rod 203. A bracket 2062 is installed on the left end of the outer wall of the housing 1. The top of the outer wall of the bracket 2062 is fixedly connected to the bottom of the outer wall of the servo motor 2061.

[0033] Specifically, the output end of the servo motor 2061 is firmly welded to the drive shaft 2065. Multiple bevel gears 2063 are evenly welded to the outer side of the drive shaft 2065. The bracket 2062 welded to the bottom of the servo motor 2061 is connected to the load-bearing plate 6, providing stable support for the servo motor 2061 during operation. When the servo motor 2061 starts, power is transmitted through the drive shaft 2065 to each bevel gear 2063, driving the bevel gear 2064 that meshes tightly with it to rotate. Each bevel gear 2064 has a threaded rod 203 welded to its rear side. The outer wall of the threaded rod 203 is connected to the threaded frame 204 via threads. The support plates 202 installed at both ends provide stable support for the rotation of the threaded rod 203 in place and also restrict the threaded frame. The limited range of movement of 204 allows it to move only outside the threaded rod 203. When the bevel gear 2064 drives the threaded rod 203 to rotate, the two threaded rods 203 restrict the rotation of the threaded frame 204. Under the action of the threads, the threaded frame 204 moves back and forth along the axial diameter of the threaded rod 203, driving the two cooling fans 205 mounted on the top to move synchronously. This achieves mechanical heat dissipation of the brushed motor inverter welding structure. The arrangement of the two cooling fans 205 promotes air convection inside the brushed motor, further improving heat dissipation efficiency. This solves the problem that when using mineral oil liquid cooling, the viscosity of mineral oil increases sharply at low temperatures and its fluidity decreases, requiring an additional heating device to maintain the viscosity. Otherwise, the device may overheat due to insufficient flow during startup.

[0034] Reference Figure 2 , Figure 3 and Figure 6 The shielding mechanism 3 includes a base 301, which is installed on the rear end of the outer wall of the housing 1. The base 301 is fixedly connected to the left and right sides of the outer wall of the base 301. The top of the outer wall of the bracket 302 on the side away from each other is rotatably connected to a rotating shaft 308. The middle of the outer wall of the multiple rotating shafts 308 is fixedly connected to a gear tooth 304. The outer wall of the multiple rotating shafts 308 on the side away from each other is fixedly connected to a triangular knob 307. A rack 303 is installed on the bottom of the outer wall of the gear tooth 304. The bottom of the outer wall of the gear tooth 304 meshes with the top of the outer wall of the rack 303. The outer wall of the rack 303 is slidably connected to the inside of the bracket 302. A fixing frame 305 is fixedly connected to the rear end of the outer wall of the rack 303. A baffle 306 is fixedly connected to the outer wall of the fixing frame 305.

[0035] Specifically, brackets 302 are symmetrically welded on both sides of the base 301. A rotating shaft 308 is installed on the outer side of the bracket 302, allowing the shaft 308 to rotate in place at the top of the bracket 302. A gear 304 is fixedly installed in the middle of the rotating shaft 308, and a triangular knob 307 is welded to the other end. When the triangular knob 307 is manually rotated, power is transmitted to the gear 304 through the rotating shaft 308, driving the gear 304 to rotate. The gear 304 meshes tightly with the rack 303, and the rotation of the gear 304 in turn drives the rack 303 to move. The internal structure of the bracket 302 is reasonably designed, providing space for the rack 303 to slide back and forth, ensuring the movement of the rack 303. To ensure stability during operation, a fixing bracket 305 is welded to the rear end of the rack 303. The outer side of the fixing bracket 305 is welded to the baffle 306. When the rack 303 moves, the baffle 306 can move back and forth under the support of the internal space of the bracket 302 through the connecting action of the fixing bracket 305. When the brushed motor stops running, the baffle 306 can be moved to the rear side of the heat sink 4, effectively preventing dust from entering the brushed motor through the internal space of the heat sink 4 and settling down. This avoids dust accumulation on the surface of the heat sink fins 5 inside the brushed motor, preventing the temperature of the internal electronic components from rising due to obstructed heat dissipation, thereby effectively protecting the service life of the brushed motor.

[0036] Reference Figure 1 , Figure 2 and Figure 3 The housing 1 has heat dissipation fins 5 fixedly connected inside. The heat dissipation fins 5 are installed on the outer front end of the heat dissipation mechanism 2. The heat dissipation fins 5 are connected to the heating element inside the brushed motor. The shape of the outer fins can increase the heat dissipation area and improve the heat dissipation efficiency. The outer rear end of the housing 1 has a heat dissipation cover 4 fixedly connected. The heat dissipation cover 4 is installed on the outer rear end of the heat dissipation mechanism 2. The bottom of the outer wall of the housing 1 has a load-bearing plate 6 installed. Multiple screws 7 are installed at equal intervals around the bottom of the housing 1. The housing 1 is fixedly connected to the top of the load-bearing plate 6 through the outer wall of the multiple screws 7. This can effectively reduce the impact force on the ground when the brushed motor is running.

[0037] Specifically, in the internal structure of the entire device, heat dissipation fins 5 are fixedly connected inside the housing 1. The heat dissipation fins 5 are precisely installed at the outer front end of the heat dissipation mechanism 2. The heat dissipation fins 5 are directly connected to the heating element inside the brushed motor. Its unique outer fin design can significantly improve heat dissipation efficiency by increasing the contact area with air. At the rear end of the outer wall of the housing 1, a heat dissipation cover 4 is fixedly connected. The heat dissipation cover 4 is installed at the outer rear end of the heat dissipation mechanism 2 and works in conjunction with the heat dissipation fins 5 to ensure the heat dissipation of the brushed motor. A load-bearing plate 6 is installed at the bottom of the outer wall of the housing 1. Multiple screws 7 are installed at equal intervals around the bottom of the housing 1. The housing 1 is fixedly connected to the top of the load-bearing plate 6 through the outer wall of these screws 7. This connection method is not only stable, but also effectively reduces the impact force on the ground generated during the operation of the brushed motor, ensuring the stability and safety of the device during operation.

[0038] Working principle: By turning on the servo motor 2061, the cooling fan 205 dissipates heat from the brushed motor. Since the output end of the servo motor 2061 is welded to the drive shaft 2065, and multiple bevel gears 2063 are welded to its outer side, the bracket 2062 welded to the bottom of the servo motor 2061 is attached to the load-bearing plate 6, providing stable support for the servo motor 2061 during operation. When the servo motor 2061 starts, its power is transmitted through the drive shaft 2065 to each bevel gear 2063, thereby driving the bevel gear 2064, which meshes tightly with it, to rotate. Each bevel gear 2064 has a threaded rod 203 welded to its rear side, and its outer wall is connected to the threaded frame 204 via threads. Support plates 202 are installed at both ends of the threaded rod 203, providing stable support and limiting the rotation of the threaded rod 203 in place. The movement range of the threaded bracket 204 is limited so that it can only move outside the threaded rod 203. When the bevel gear 2064 drives the threaded rod 203 to rotate, the rotation of the threaded bracket 204 is restricted by the two threaded rods 203, so that the threaded bracket 204 can only move back and forth along the axial diameter of the threaded rod 203 under the action of the thread. This drives the two cooling fans 205 mounted on its top to move, thereby realizing the dissipation of mechanical energy of the inverter welding structure of the brushed motor. At the same time, the design of the two cooling fans 205 can form air convection in the internal space of the brushed motor, further improving the heat dissipation efficiency of the brushed motor. This solves the problem that when using mineral oil for liquid cooling, the viscosity of mineral oil is very high at low temperatures, and the fluidity will drop sharply. During use, an additional heating device is required to maintain the viscosity. Otherwise, the device will overheat due to insufficient flow during startup.

[0039] Rotating the triangular knob 307 moves the baffle 306, thus blocking dust. Because brackets 302 are welded to both sides of the base 301, and their outer sides can rotate in place at the top of the bracket 302 via a rotating shaft 308, a gear 304 is installed in the middle of the rotating shaft 308, and the triangular knob 307 is welded to the other end. Therefore, when the triangular knob 307 is rotated, its power is transmitted through the rotating shaft 308 to the gear 304, causing it to rotate. This, in turn, drives the rack 303, which meshes tightly with the gear 304, to move. The interior of the bracket 302 allows the rack 303 to slide back and forth, facilitating the movement of the rack 303. The rack 303 is equipped with a fixed bracket 305 welded to its rear end, and the outer side of the bracket 305 is welded to the baffle 306. Therefore, when the rack 303 moves, the baffle 306 can be moved back and forth through the connection of the fixed bracket 305 and under the stable support provided by the internal space of the bracket 302. This allows the baffle 306 to be moved to the rear side of the heat sink 4 when the brushed motor stops running, preventing dust from entering the brushed motor through the internal space of the heat sink 4 and settling inside. This solves the problem of dust accumulating and settling on the surface of the heat sink fins 5 inside the brushed motor, which causes the temperature of the electronic components inside the brushed motor to rise and affects its service life.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A brushed motor welding inverter heat dissipation structure, comprising a housing (1), characterized in that: A heat dissipation mechanism (2) is installed at the rear end of the inner side of the housing (1). The heat dissipation mechanism (2) is used to dissipate heat from the brushed motor. A shielding mechanism (3) is installed at the rear end of the outer wall of the housing (1). The shielding mechanism (3) is used to shield dust. The heat dissipation mechanism (2) includes a base plate (201), which is installed inside the rear end of the housing (1). Multiple threaded rods (203) are installed on the top outer side of the base plate (201), and a threaded frame (204) is installed on the outer side of the base plate (201). The outer walls of the multiple threaded rods (203) are threaded to the inner bottom wall of the threaded frame (204). Cooling fans (205) are fixedly connected to the top left and right sides of the outer wall of the threaded frame (204), and a drive assembly (206) is installed on the left outer side of the base plate (201).

2. The brushed motor welding inverter heat dissipation structure according to claim 1, characterized in that: The drive assembly (206) includes a servo motor (2061), which is mounted on the outer left side of the base plate (201). The output end of the servo motor (2061) is fixedly connected to a drive shaft (2065). The outer wall of the drive shaft (2065) is rotatably connected to the left end of the housing (1). Multiple bevel gears (2063) are fixedly connected to the outer wall of the drive shaft (2065). Bevel gears (2064) are installed on the rear side of the outer wall of each of the multiple bevel gears (2063). The rear side of the outer wall of the bevel gears (2063) meshes with the left side of the outer wall of the bevel gears (2064). The rear side of the outer wall of the bevel gears (2064) is fixedly connected to the front end of the outer wall of the threaded rod (203).

3. The brushed motor welding inverter heat dissipation structure according to claim 1, characterized in that: The shielding mechanism (3) includes a base (301), which is installed on the rear end of the outer wall of the housing (1). The base (301) is fixedly connected to the left and right sides of the outer wall of the base (301). The top of the outer wall of the support (302) on the opposite side is rotatably connected to a rotating shaft (308). The middle of the outer wall of the multiple rotating shafts (308) is fixedly connected to a gear tooth (304). The opposite end of the outer wall of the multiple rotating shafts (308) is fixedly connected to a triangular knob (307). A rack (303) is installed on the bottom of the outer wall of the gear tooth (304). The bottom of the outer wall of the gear tooth (304) meshes with the top of the outer wall of the rack (303). The outer wall of the rack (303) is slidably connected to the inside of the support (302). A fixing frame (305) is fixedly connected to the rear end of the outer wall of the rack (303). A baffle (306) is fixedly connected to the outer wall of the fixing frame (305).

4. The brushed motor welding inverter heat dissipation structure according to claim 2, characterized in that: Support plates (202) are installed on the front and rear ends of the outer wall of the threaded rod (203). The bottom of the outer wall of the multiple support plates (202) is fixedly connected to the top of the outer wall of the base plate (201). The upper middle inner wall of the support plate (202) is rotatably connected to the outer wall of the threaded rod (203).

5. The brushed motor welding inverter heat dissipation structure according to claim 2, characterized in that: A bracket (2062) is installed on the left end of the outer wall of the housing (1), and the top of the outer wall of the bracket (2062) is fixedly connected to the bottom of the outer wall of the servo motor (2061).

6. The brushed motor welding inverter heat dissipation structure according to claim 1, characterized in that: The heat dissipation fins (5) are fixedly connected inside the housing (1), and the heat dissipation fins (5) are installed on the outer front end of the heat dissipation mechanism (2).

7. The brushed motor welding inverter heat dissipation structure according to claim 1, characterized in that: A heat dissipation cover (4) is fixedly connected to the rear end of the outer wall of the housing (1), and the heat dissipation cover (4) is installed on the outer rear end of the heat dissipation mechanism (2).

8. The brushed motor welding inverter heat dissipation structure according to claim 1, characterized in that: A load-bearing plate (6) is installed on the bottom of the outer wall of the housing (1). Multiple screws (7) are installed at equal intervals around the bottom of the housing (1). The housing (1) is fixedly connected to the top of the load-bearing plate (6) through the outer wall of the multiple screws (7).

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