A passive cooling gearbox

Abstract

This utility model discloses a passive cooling gearbox, mainly relating to the field of remote control car gearbox technology. It includes a cooling motor frame, a transition drive shaft protective cover, and a secondary transmission fixing frame arranged sequentially from top to bottom. A transition drive shaft is located inside the transition drive shaft protective cover. A blower-type cooling wheel is located at the top of the transition drive shaft. A motor is mounted on the cooling motor frame, and a drive wheel is mounted on the motor shaft. An output shaft is mounted on the secondary transmission fixing frame. A transition wheel is located at the bottom of the transition drive shaft, and a driven wheel is located at the bottom of the output shaft, with the driven wheel and transition wheel being connected in a driving connection. A fixed mounting bracket is located on one side of the transition drive shaft protective cover. Both the cooling motor frame and the secondary transmission fixing bracket are hinged to the fixed mounting bracket via the output shaft. This utility model can improve the heat dissipation effect of the motor, reduce the risk of wire entanglement, and extend its service life.

Description

Technical Field

[0001] This utility model relates to the field of remote control car gearbox technology, specifically a passive cooling gearbox. Background Technology

[0002] Currently, most remote control car gearboxes use gear / pulley gearboxes, which often lack passive cooling design. Remote control cars require high motor speeds and bear heavy loads when drifting. Gearboxes without passive cooling design cannot stably dissipate motor temperature, preventing the motor from running at full power continuously and potentially damaging surrounding components due to high temperatures. In addition, gearboxes without protective covers pose a significant safety hazard as there is a high risk of wires getting tangled in them. Furthermore, the lack of bearing assembly design optimized for rotating object loads also reduces lifespan. Summary of the Invention

[0003] The main purpose of this invention is to ensure the stability of the gearbox at high speeds in remote-controlled cars by providing a passive cooling gearbox that can improve the heat dissipation of the motor, reduce the risk of wires getting tangled, and extend the service life.

[0004] To achieve the above objectives, this utility model employs the following technical solution:

[0005] A passively cooled gearbox includes, from top to bottom, a cooling motor frame, a transition drive shaft protective cover, and a secondary transmission fixing frame. A transition drive shaft is located inside the transition drive shaft protective cover. The top end of the transition drive shaft extends upwards from and is rotatably connected to the cooling motor frame, while the bottom end extends downwards from and is rotatably connected to the secondary transmission fixing frame. A blower-type cooling wheel is located at the top of the transition drive shaft, with several vertically penetrating vents on the blower-type cooling wheel. Several blades are located at the bottom of the blower-type cooling wheel. A motor is mounted on the cooling motor frame, with its motor shaft parallel to the transition drive shaft. A drive mechanism is mounted on the motor shaft. The drive wheel is connected to the blower-type cooling wheel; the secondary transmission mounting bracket has an output shaft, the top end of which is rotatably connected to the cooling motor frame, and the bottom end of which is rotatably connected to the secondary transmission mounting bracket; the bottom of the transition transmission shaft has a transition wheel, and the bottom end of the output shaft has a driven wheel, which is connected to the transition wheel; the transmission ratio between the drive wheel and the blower-type cooling wheel and / or the transmission ratio between the driven wheel and the transition wheel is adjustable; a fixed mounting bracket is provided on one side of the protective cover of the transition transmission shaft; the cooling motor frame and the secondary transmission mounting bracket are both hinged to the fixed mounting bracket via the output shaft, and a locking mechanism is provided between the fixed mounting bracket and the cooling motor frame and / or between the fixed mounting bracket and the secondary transmission mounting bracket.

[0006] Preferably, an electronic device mounting bracket is provided on one side of the transition drive shaft protective cover, and the electronic device mounting bracket is detachably connected to the transition drive shaft protective cover.

[0007] Preferably, the upper and lower ends of the transition drive shaft protective cover are provided with first locking screws, and the heat dissipation motor frame and the secondary transmission fixing frame are provided with first arc-shaped holes adapted to the first locking screws.

[0008] Preferably, the outer wall of the transition drive shaft protective cover is provided with a spiral groove for accommodating cables.

[0009] Preferably, both the drive wheel and the blower-type cooling wheel are gears, and the drive wheel meshes with the blower-type cooling wheel. The drive wheel is detachably connected to the motor shaft of the motor, and the distance between the motor and the protective cover of the transition transmission shaft is adjustable.

[0010] Preferably, the drive wheel and the blower-type cooling wheel are both sprockets or belt pulleys.

[0011] Preferably, the driven wheel and the transition wheel are both gears, sprockets, or belt pulleys.

[0012] Preferably, the locking mechanism includes a second locking screw, a screw hole adapted to the second locking screw is provided on the fixed mounting bracket, and a second arc-shaped hole adapted to the second locking screw is provided on the heat dissipation motor bracket and / or the secondary transmission fixed bracket.

[0013] Preferably, the upper and lower ends of the heat dissipation motor frame are provided with first bearing positions adapted to the transition transmission shaft, the top end of the secondary transmission fixing frame is provided with a second bearing position adapted to the transition transmission shaft, and the upper and lower ends of the secondary transmission fixing frame are provided with third bearing positions adapted to the output shaft.

[0014] Preferably, both the heat dissipation motor frame and the secondary transmission fixing frame are equipped with protective covers.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model is installed on the vehicle frame by a fixed mounting bracket. When the locking mechanism is released, the whole consisting of the cooling motor bracket, the transition drive shaft protective cover, and the secondary transmission fixing bracket can rotate around the axis of the output shaft. The position of the motor can be adjusted to change the vehicle's center of gravity and the position of the force of the rotational output shaft effect, thereby changing the vehicle's handling. After the position is adjusted, it can be locked by the locking mechanism.

[0017] 2. Loosen the first locking screw and rotate the transition drive shaft protective cover. It can provide a variety of electronic equipment mounting bracket installation methods, allowing for more ways to place electronic equipment (such as front, middle, rear, etc. with stepless adjustment); at the same time, the transition drive shaft protective cover also serves to reinforce the gearbox and reduce the possible deformation of the gearbox under high load.

[0018] 3. The outer contour of the transition transmission protective cover adopts a groove design with a recess, in which cables can be wrapped or passed directly to reduce the difficulty of cable management; the transition transmission protective cover adopts a closed design, which can reduce the foreign objects from being caught in the transmission shaft and increase service life.

[0019] 4. The motor rotation drives the blower-type cooling wheel to rotate. When the blower-type cooling wheel rotates, the blades on the back agitate the air, and together with the protective cover of the cooling motor frame, they form a blower area, which efficiently blows the airflow to the cooling fin area, improving the heat dissipation efficiency.

[0020] 5. The load at the bottom of the transition drive shaft is relatively small, so using a single bearing can save space; the bottom of the output shaft and the top of the transition drive shaft have a large shaft effect, so using double bearings to fix them can increase the load capacity and life.

[0021] 6. Protective covers are provided on the heat dissipation motor frame and the secondary transmission fixing frame to reduce the risk of foreign objects being entangled and improve the overall service life. Attached Figure Description

[0022] Figure 1 This is one of the structural schematic diagrams of this utility model.

[0023] Figure 2 This is the second structural schematic diagram of this utility model.

[0024] Figure 3 This is the third structural schematic diagram of this utility model.

[0025] Figure 4 This is the fourth structural schematic diagram of this utility model.

[0026] The following are the reference numerals in the attached diagram: 1. Heat dissipation motor bracket; 11. Motor; 12. Drive wheel; 2. Transition drive shaft protective cover; 21. Transition drive shaft; 22. Blower-type heat dissipation wheel; 23. Vent hole; 24. Blade; 25. Transition wheel; 26. First locking screw; 27. Groove; 3. Secondary transmission fixing bracket; 31. Output shaft; 32. Driven wheel; 4. Fixed mounting bracket; 5. Locking mechanism; 51. Second locking screw; 52. Second arc-shaped hole; 6. Electronic equipment mounting bracket; 7. First arc-shaped hole. Detailed Implementation

[0027] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0028] Example: As attached Figure 1-4 As shown, this utility model describes a passive cooling gearbox, comprising a cooling motor frame 1, a transition drive shaft protective cover 2, and a secondary transmission fixing frame 3 arranged sequentially from top to bottom. A transition drive shaft 21 is provided inside the transition drive shaft protective cover 2. The top end of the transition drive shaft 21 extends upward from the cooling motor frame 1 and is rotatably connected to it. The bottom end of the transition drive shaft 21 extends downward from the secondary transmission fixing frame 3 and is rotatably connected to it. Preferably, both the upper and lower ends of the cooling motor frame 1 are provided with first bearing positions adapted to the transition drive shaft 21, and the top end of the secondary transmission fixing frame 3 is provided with a second bearing position adapted to the transition drive shaft 21. Bearings adapted to the transition drive shaft 21 are installed in both the first and second bearing positions. The load at the bottom end of the transition drive shaft 21 is relatively small, and using a single bearing saves space. Since the top end of the transition drive shaft 21 has a larger shaft effect, using double bearings for fixing increases load capacity and lifespan.

[0029] The top of the transition drive shaft 21 is provided with a blower-type heat dissipation wheel 22. The blower-type heat dissipation wheel 22 is provided with several vertically penetrating vent holes 23. The bottom of the blower-type heat dissipation wheel 22 is provided with several blades 24. When the blower-type heat dissipation wheel 22 rotates, it drives the blades 24 to rotate around the axis of the transition drive shaft 21, which enables the heat on the heat dissipation motor frame 1 to be dissipated quickly.

[0030] The heat dissipation motor frame 1 is equipped with a motor 11. The motor shaft of the motor 11 is parallel to the transition transmission shaft 21. The motor shaft of the motor 11 is equipped with a drive wheel 12. The drive wheel 12 is connected to the blower-type heat dissipation wheel 22 and is driven by the motor 11 to rotate the transition transmission shaft 21.

[0031] The heat dissipation motor frame 1 can use high thermal conductivity materials such as aluminum alloy, brass, or pure copper, and the heat dissipation fins are machined in one piece to improve heat dissipation efficiency. Bearings can be installed on both sides to improve the bearing load capacity and reduce the load on a single bearing.

[0032] The secondary transmission mounting bracket 3 is equipped with an output shaft 31. The top end of the output shaft 31 is rotatably connected to the cooling motor bracket 1, and the bottom end is rotatably connected to the secondary transmission mounting bracket 3. Preferably, both the upper and lower ends of the secondary transmission mounting bracket 3 are provided with third bearing positions adapted to the output shaft 31. Bearings adapted to the output shaft 31 are installed in the third bearing positions. Due to its large shaft effect, the bottom end of the output shaft 31 is fixed with double bearings, which can increase its load capacity and lifespan. The output shaft 31 is connected to the mounting shaft of the remote control car wheel through a transmission mechanism. Gears, sprockets, pulleys, etc., can be installed on the output shaft 31 for power output.

[0033] The bottom of the transition drive shaft 21 is provided with a transition wheel 25, and the bottom end of the output shaft 31 is provided with a driven wheel 32, which is connected to the transition wheel 25 in a transmission manner.

[0034] The transmission ratio between the drive wheel 12 and the blower-type cooling wheel 22, and / or the transmission ratio between the driven wheel 32 and the transition wheel 25, is adjustable. To facilitate transmission ratio adjustment, the drive wheel 12 is detachably connected to the motor shaft of the motor 11, allowing for transmission ratio adjustment by replacing the drive wheel 12. Similarly, the driven wheel 32 can be detachably connected to the output shaft 31, allowing for transmission ratio adjustment by replacing the driven wheel 32.

[0035] The drive wheel 12, the blower-type cooling wheel 22, the driven wheel 32, and the transition wheel 25 can be gears, sprockets, or pulleys. When the drive wheel 12 and the blower-type cooling wheel 22 are gears, the drive wheel 12 meshes with the blower-type cooling wheel 22. The drive wheel 12 is detachably connected to the motor shaft of the motor 11. The transmission ratio can be adjusted by replacing the drive wheel 12. Since different sizes of drive wheels need to be replaced, the distance between the motor 11 and the transition drive shaft protective cover 2 needs to be adjustable to meet the installation requirements. Specifically, the cooling motor frame 1 is provided with a U-shaped opening that is adapted to the motor shaft of the motor 11. The motor shaft is located in the U-shaped opening. On both sides of the U-shaped opening on the cooling motor frame 1, there are waist-shaped holes. Screws for fixing the motor 11 to the cooling motor frame 1 are provided in the waist-shaped holes. The distance between the motor 11 and the transition drive shaft protective cover 2 can be adjusted by adjusting the position of the screws in the waist-shaped holes. When the drive wheel 12 and the blower-type cooling wheel 2 are sprockets, they are driven by a chain. The transmission ratio can be adjusted by replacing the drive wheel 12 and the chain. When the drive wheel 12 and the blower-type cooling wheel 22 are pulleys, they are driven by a belt. The transmission ratio can be adjusted by replacing the drive wheel 12 and the belt. When the driven wheel 32 and the transition wheel 25 are gears, they mesh. The transmission ratio can be adjusted by swapping the driven wheel 32 and the transition wheel 25. When the driven wheel 32 and the transition wheel 25 are sprockets, they are driven by a chain. The transmission ratio can be adjusted by replacing the driven wheel 32 and the chain. When the driven wheel 32 and the transition wheel 25 are pulleys, they are driven by a belt. The transmission ratio can be adjusted by replacing the driven wheel 32 and the belt.

[0036] A fixed mounting bracket 4 is provided on one side of the transition drive shaft protective cover 2. The fixed mounting bracket 4 has several screw mounting holes. The cooling motor bracket 1 and the secondary transmission fixed bracket 3 are both hinged to the fixed mounting bracket 4 via the output shaft 31. A locking mechanism 5 is provided between the fixed mounting bracket 4 and the cooling motor bracket 1 and / or between the fixed mounting bracket 4 and the secondary transmission fixed bracket 3. The present invention is installed on the vehicle frame via the fixed mounting bracket 4. After releasing the locking mechanism 5, the entire assembly consisting of the cooling motor bracket 1, the transition drive shaft protective cover 2, and the secondary transmission fixed bracket 3 can rotate around the axis of the output shaft 31. This allows adjustment of the position of the motor 11 to change the vehicle's center of gravity and the position of the force exerted by the rotating output shaft, thereby changing the vehicle's handling. After the position adjustment is completed, the entire assembly consisting of the cooling motor bracket 1, the transition drive shaft protective cover 2, and the secondary transmission fixed bracket 3 is locked by the locking mechanism. The fact that the cooling motor bracket 1 and the secondary transmission fixed bracket 3 are both hinged to the fixed mounting bracket 4 via the output shaft 31 ensures that the relative position of the output shaft 31 and the vehicle frame remains unchanged, guaranteeing output stability.

[0037] By replacing the transition transmission protective cover 2 with one made of a different material (copper / stainless steel / tungsten steel / aluminum alloy, etc.), the counterweight can be changed, increasing / decreasing the change in center of gravity caused by changing the motor angle.

[0038] The locking mechanism 5 includes a second locking screw 51, and the fixed mounting bracket 4 is provided with a screw hole adapted to the second locking screw 51. The heat dissipation motor bracket 1 and / or the secondary transmission fixed bracket 3 are provided with a second arc-shaped hole 52 adapted to the second locking screw 51.

[0039] Preferably, an electronic device mounting bracket 6 is provided on one side of the transition drive shaft protective cover 2. The electronic device mounting bracket 6 is detachably connected to the transition drive shaft protective cover 2 and can be fixed to the transition drive shaft protective cover 2 with screws.

[0040] Preferably, the transition drive shaft protective cover 2 is provided with first locking screws 26 at both the upper and lower ends, and the heat dissipation motor bracket 1 and the secondary transmission fixing bracket 3 are provided with first arc-shaped holes 7 that are adapted to the first locking screws 26. Loosening the first locking screws 26 and rotating the transition drive shaft protective cover 2 can provide a variety of installation methods for the electronic equipment mounting bracket 6, allowing for more ways to place the electronic equipment (such as stepless adjustment such as front, middle, and rear placement).

[0041] Preferably, the outer wall of the transition drive shaft protective cover 2 is provided with a spiral groove 27 for accommodating cables. The outer contour of the transition drive protective cover 2 adopts a grooved design with groove 27, in which cables can be wrapped or passed directly, reducing the difficulty of cable management; the transition drive protective cover adopts a closed design, which can reduce the ingress of foreign objects into the drive shaft and increase its service life.

[0042] Preferably, both the heat dissipation motor frame 1 and the secondary transmission fixing frame 3 are equipped with protective covers, which can reduce the risk of foreign objects being entangled and improve the overall lifespan.

Claims

1. A passively cooled transmission, characterized by: The system includes, from top to bottom, a heat dissipation motor frame (1), a transition drive shaft protective cover (2), and a secondary transmission fixing frame (3). The inner side of the transition drive shaft protective cover (2) has a transition drive shaft (21). The top end of the transition drive shaft (21) extends upwards from the heat dissipation motor frame (1) and is rotatably connected to it. The bottom end of the transition drive shaft (21) extends downwards from the secondary transmission fixing frame (3) and is rotatably connected to it. The top of the transition drive shaft (21) has a blower-type heat dissipation wheel (22), which has several vertically penetrating ventilation holes (23). The bottom of the blower-type heat dissipation wheel (22) has several blades (24). The heat dissipation motor frame (1) has a motor (11), whose motor shaft is parallel to the transition drive shaft (21). The motor shaft of the motor (11) has a drive wheel (12). The drive wheel (12) is connected to the blower-type heat sink (22) via transmission; the secondary transmission fixing frame (3) is provided with an output shaft (31), the top end of the output shaft (31) is rotatably connected to the heat sink motor frame (1), and the bottom end is rotatably connected to the secondary transmission fixing frame (3); the bottom of the transition transmission shaft (21) is provided with a transition wheel (25), and the bottom end of the output shaft (31) is provided with a driven wheel (32), which is connected to the transition wheel (25) via transmission; the drive wheel (12) is connected to the blower-type heat sink. The transmission ratio between the wheels (22) and / or the transmission ratio between the driven wheel (32) and the transition wheel (25) is adjustable; a fixed mounting bracket (4) is provided on one side of the protective cover (2) of the transition transmission shaft, and the heat dissipation motor bracket (1) and the secondary transmission fixed bracket (3) are both hinged to the fixed mounting bracket (4) through the output shaft (31), and a locking mechanism (5) is provided between the fixed mounting bracket (4) and the heat dissipation motor bracket (1) and / or between the fixed mounting bracket (4) and the secondary transmission fixed bracket (3).

2. A passive heat sink transmission according to claim 1 wherein: An electronic device mounting bracket (6) is provided on one side of the transition drive shaft protective cover (2), and the electronic device mounting bracket (6) is detachably connected to the transition drive shaft protective cover (2).

3. The passive cooling gearbox according to claim 1, characterized in that: The upper and lower ends of the transition drive shaft protective cover (2) are provided with first locking screws (26), and the heat dissipation motor bracket (1) and the secondary transmission fixing bracket (3) are provided with first arc-shaped holes (7) that are adapted to the first locking screws (26).

4. A passively cooled transmission according to claim 1, characterized in that: The outer wall of the transition drive shaft protective cover (2) is provided with a spiral groove (27) for accommodating cables.

5. A passively cooled transmission according to claim 1, characterized in that: The drive wheel (12) and the blower-type heat sink wheel (22) are both gears, and the drive wheel (12) meshes with the blower-type heat sink wheel (22). The drive wheel (12) is detachably connected to the motor shaft of the motor (11), and the distance between the motor (11) and the transition transmission shaft protective cover (2) is adjustable.

6. A passively cooled transmission according to claim 1, characterized in that: The drive wheel (12) and the blower-type cooling wheel (22) are both sprockets or belt pulleys.

7. A passively cooled transmission according to claim 1, characterized in that: The driven wheel (32) and the transition wheel (25) are both gears, sprockets, or belt pulleys.

8. A passively cooled transmission according to claim 1, characterized in that: The locking mechanism (5) includes a second locking screw (51), and a screw hole adapted to the second locking screw (51) is provided on the fixed mounting bracket (4), and a second arc-shaped hole (52) adapted to the second locking screw (51) is provided on the heat dissipation motor bracket (1) and / or the secondary transmission fixed bracket (3).

9. A passively cooled transmission according to claim 1, characterized in that: The upper and lower ends of the heat dissipation motor frame (1) are provided with a first bearing position adapted to the transition transmission shaft (21), the top end of the secondary transmission fixing frame (3) is provided with a second bearing position adapted to the transition transmission shaft (21), and the upper and lower ends of the secondary transmission fixing frame (3) are provided with a third bearing position adapted to the output shaft (31).

10. A passively cooled transmission according to claim 1, characterized in that: Protective covers are provided on both the heat dissipation motor frame (1) and the secondary transmission fixing frame (3).

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