Mechanical transmission device with frequency conversion control

Abstract

The utility model discloses a mechanical transmission device with frequency conversion control, and belongs to the technical field of mechanical transmission equipment. The device comprises a variable frequency motor, an output shaft, a driving synchronous wheel, a driven wheel, a synchronous belt and a supporting plate. A mounting seat with a built-in heat dissipation air duct is arranged on the supporting plate, and the variable frequency motor is arranged in the heat dissipation air duct; a cooling fan is arranged at the end, close to the motor, of the output shaft. The two sides of the front end of the supporting plate are rotationally connected with a driving synchronous wheel and a driven wheel, and the two wheels are sleeved with a synchronous belt. The air inlet end of the heat dissipation air channel is provided with a flow guide cover which is internally provided with spiral flow deflectors with increasing screw pitches. The tensioning mechanism is composed of a rotating motor, a rotating swing arm and a tensioning wheel, and the rotating motor drives the swing arm to drive the tensioning wheel to press the synchronous belt. According to the utility model, heat dissipation is optimized through forced air cooling circulation and spiral airflow, so that the heat dissipation efficiency and stability of the variable frequency motor are obviously improved; the looseness of the synchronous belt is compensated in real time through the automatic tensioning mechanism, and the transmission precision and reliability are guaranteed.

Description

Technical Field

[0001] This utility model relates to mechanical transmission devices, specifically to a mechanical transmission device with frequency conversion control. Background Technology

[0002] Traditional mechanical transmission devices typically use electric motors as the power source, transmitting power via belts or gears. With the increasing level of industrial automation, variable frequency motors (VFMs) are widely used due to their wide speed range and energy-saving advantages. However, VFMs generate a significant amount of heat during operation, especially at low speeds, heavy loads, or high frequencies, making heat dissipation a particularly prominent issue. Existing motor cooling methods mostly involve built-in fans or external cooling, but these methods may suffer from low heat dissipation efficiency, high noise levels, and large space requirements, affecting the stability and lifespan of the transmission device. Furthermore, for synchronous belt drives, long-term operation may lead to loosening, affecting transmission accuracy and efficiency; existing tensioning mechanisms may be complex in structure or inconvenient to adjust.

[0003] Therefore, how to improve the heat dissipation efficiency of variable frequency motors, extend their service life, and achieve effective tension in synchronous belt drives are urgent problems to be solved in the design of current mechanical transmission devices. Utility Model Content

[0004] To address the issues of low heat dissipation efficiency, reduced stability, and shorter lifespan of existing variable frequency motors in mechanical transmission devices, as well as the potential slack in synchronous belt drives, a mechanical transmission device with variable frequency control that features a compact structure, high heat dissipation efficiency, and automatic tensioning function is provided.

[0005] The technical solution adopted by this utility model is: a mechanical transmission device with frequency conversion control, including a frequency conversion motor, an output shaft, a driving synchronous pulley, a driven pulley, a synchronous belt, and a support plate. The support plate is characterized by having a mounting base with a heat dissipation duct on the mounting base, the frequency conversion motor being disposed within the heat dissipation duct, a cooling fan being disposed on the output shaft near the frequency conversion motor, the driving synchronous pulley being connected to the output end of the frequency conversion motor via the output shaft, and the driving synchronous pulley and driven pulley being rotatably connected on both sides of the front end of the support plate, with the synchronous belt tensioned and sleeved on the driving synchronous pulley and driven pulley.

[0006] Preferably, the mechanical transmission device with frequency conversion control is characterized in that: it further includes a tensioning mechanism, which consists of a rotary motor, a rotary swing arm and a tensioning wheel. The rotary motor is mounted on a support plate and located between the driving synchronous wheel and the driven wheel. The output end of the rotary motor is fixedly connected to one end of the rotary swing arm, and the other end of the rotary swing arm is rotatably connected to the tensioning wheel. The tensioning wheel is pressed against the synchronous belt.

[0007] Preferably, the mechanical transmission device with frequency conversion control is characterized in that: the air inlet end of the heat dissipation duct is provided with a guide shroud.

[0008] Preferably, the mechanical transmission device with frequency conversion control is characterized in that: a spiral guide vane is provided in the heat dissipation duct, and the axial length of the spiral guide vane matches the length of the frequency conversion motor.

[0009] Preferably, the mechanical transmission device with frequency conversion control is characterized in that the pitch of the spiral guide vane increases along the airflow direction.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. By embedding the variable frequency motor inside the heat dissipation duct and using the output shaft to drive the cooling fan to draw air, a forced air cooling cycle is formed, which greatly improves the heat dissipation efficiency. At the same time, the compact structure effectively reduces noise and ensures the stable operation and service life of the variable frequency motor under various working conditions.

[0012] 2. A guide shroud is installed at the air inlet of the cooling duct to effectively guide external air into the duct, reduce turbulence, and improve air intake efficiency. Spiral guide vanes are installed inside the cooling duct to create a spiral airflow, increasing the contact area and time between the airflow and the motor housing, thus improving heat exchange efficiency. The pitch of the spiral guide vanes increases along the airflow direction, which helps to achieve more uniform heat dissipation along the entire length of the motor and avoid localized overheating.

[0013] 3. The added tensioning mechanism uses a rotary motor to drive a rotating swing arm and tensioning wheel to press the synchronous belt, achieving precise tensioning of the synchronous belt. This avoids the decrease in transmission accuracy and efficiency caused by the loosening of the synchronous belt during long-term operation, extends the service life of the synchronous belt, and improves the reliability of the transmission device. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a top view of the present invention;

[0017] Figure 3 This is a schematic diagram of the internal structure of the heat dissipation duct.

[0018] In the diagram: 1-Variable frequency motor; 2-Output shaft; 3-Driving synchronous pulley; 4-Driven pulley; 5-Synchronous belt; 6-Support plate; 7-Mounting base; 8-Heat dissipation duct; 9-Heat dissipation fan; 10-Rotating motor; 11-Rotating swing arm; 12-Tensioning pulley; 13-Guide shroud; 14-Helical guide vane. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] like Figures 1-3 As shown, the mechanical transmission device with frequency conversion control provided by this utility model mainly includes a frequency conversion motor 1, an output shaft 2, a driving synchronous pulley 3, a driven pulley 4, a synchronous belt 5, and a support plate 6.

[0021] The support plate 6 serves as the base of the device, supporting and securing the various components. A mounting base 7 is provided on the support plate 6; the mounting base 7 is box-shaped, with a hollow interior forming a heat dissipation duct 8. The variable frequency motor 1 is tightly disposed inside the heat dissipation duct 8. This design ensures that the variable frequency motor 1 is surrounded by the heat dissipation duct 8, facilitating heat dissipation.

[0022] The output end of the variable frequency motor 1 is connected to an output shaft 2. A cooling fan 9 is installed on the output shaft 2 near the variable frequency motor 1, i.e. inside the heat dissipation duct 8. When the variable frequency motor 1 is running, the output shaft 2 rotates synchronously, driving the cooling fan 9 to rotate at high speed, forming a strong airflow in the heat dissipation duct 8, which quickly carries away the heat generated by the variable frequency motor 1 and discharges it through the duct.

[0023] The output shaft 2 extends out of the heat dissipation duct 8 and is fixedly connected to the active synchronous wheel 3, so that the active synchronous wheel 3 can rotate with the rotation of the variable frequency motor 1.

[0024] The support plate 6 has a driving synchronous pulley 3 and a driven pulley 4 rotatably connected on both sides of its front end. The driving synchronous pulley 3 and the driven pulley 4 are connected by a synchronous belt 5, which is tensioned and sleeved on the driving synchronous pulley 3 and the driven pulley 4 to form a highly efficient and reliable synchronous transmission.

[0025] In a preferred embodiment of this invention, the device further includes a tensioning mechanism. This tensioning mechanism comprises a rotary motor 10, a rotary swing arm 11, and a tensioning wheel 12. The rotary motor 10 is mounted on the support plate 6 and located in the area between the driving synchronous pulley 3 and the driven pulley 4. The output end of the rotary motor 10 is fixedly connected to one end of the rotary swing arm 11, while the other end of the rotary swing arm 11 is rotatably connected to the tensioning wheel 12. The tensioning wheel 12 presses against the outside of the synchronous belt 5. The angle of the rotary swing arm 11 is adjusted by the rotation of the rotary motor 10, thereby applying appropriate pressure to the synchronous belt 5, maintaining the tension of the synchronous belt 5, preventing it from loosening during long-term operation, and ensuring transmission accuracy and efficiency.

[0026] To further improve heat dissipation efficiency, a guide shroud 13 is provided at the air inlet end of the heat dissipation duct 8. The guide shroud 13 is funnel-shaped, which can effectively collect the surrounding air and guide it smoothly into the heat dissipation duct 8, reducing air intake resistance and increasing the air intake volume of the cooling fan 9.

[0027] To utilize the airflow within the cooling duct 8 more efficiently, a spiral guide vane 14 is provided inside the cooling duct 8, surrounding the outer wall of the variable frequency motor 1. The axial length of the spiral guide vane 14 matches the length of the variable frequency motor 1, ensuring effective cooling of the entire motor body. The presence of the spiral guide vane 14 allows the airflow to form a spiral shape as it passes through the cooling duct 8, increasing the contact area and contact time between the airflow and the casing of the variable frequency motor 1, thereby significantly improving heat transfer efficiency.

[0028] Furthermore, to achieve a more uniform heat dissipation effect, the pitch of the spiral guide vane 14 increases gradually along the airflow direction. This means that the pitch is smaller at the air duct inlet and the airflow speed is faster, while the pitch gradually increases at the air duct outlet, making the airflow more evenly distributed along the entire length of the variable frequency motor 1, avoiding local overheating, and ensuring the overall cooling effect of the variable frequency motor 1.

[0029] When this invention is in operation, the variable frequency motor 1 adjusts its speed according to the control signal, driving the output shaft 2 and the active synchronous pulley 3 to rotate, which in turn drives the driven pulley 4 through the synchronous belt 5 to achieve mechanical transmission. Simultaneously, the cooling fan 9 on the output shaft 2 rotates, drawing in air from the outside through the guide shroud 13. The air, guided by the spiral guide vanes 14 within the cooling duct 8, forms a spiral airflow, efficiently carrying away the heat dissipated by the variable frequency motor 1. The tensioning mechanism adjusts the pressure of the tensioning pulley 12 on the synchronous belt 5 in real time or as needed, ensuring that the transmission is always in optimal condition.

Claims

1. A mechanical transmission device with frequency conversion control, comprising a frequency conversion motor (1), an output shaft (2), a driving synchronous pulley (3), a driven pulley (4), a synchronous belt (5), and a support plate (6), characterized in that: The support plate (6) is provided with a mounting base (7), the mounting base (7) is provided with a heat dissipation duct (8), the variable frequency motor (1) is located in the heat dissipation duct (8), the output shaft (2) is provided with a cooling fan (9) on the side near the variable frequency motor (1), the active synchronous pulley (3) is connected to the output end of the variable frequency motor (1) through the output shaft (2), the active synchronous pulley (3) and the driven pulley (4) are rotatably connected on both sides of the front end of the support plate (6), and the synchronous belt (5) is tensioned and sleeved on the active synchronous pulley (3) and the driven pulley (4).

2. The mechanical transmission device with frequency conversion control according to claim 1, characterized in that: It also includes a tensioning mechanism, which consists of a rotary motor (10), a rotary swing arm (11), and a tensioning wheel (12). The rotary motor (10) is mounted on the support plate (6) and located between the driving synchronous wheel (3) and the driven wheel (4). The output end of the rotary motor (10) is fixedly connected to one end of the rotary swing arm (11), and the other end of the rotary swing arm (11) is rotatably connected to the tensioning wheel (12). The tensioning wheel (12) is pressed against the synchronous belt (5).

3. The mechanical transmission device with frequency conversion control according to claim 1, characterized in that: The air inlet end of the heat dissipation duct (8) is provided with a guide shroud (13).

4. A mechanical transmission device with frequency conversion control according to claim 1, characterized in that: The heat dissipation duct (8) is provided with a spiral guide vane (14), and the axial length of the spiral guide vane (14) matches the length of the variable frequency motor (1).

5. A mechanical transmission device with frequency conversion control according to claim 4, characterized in that: The pitch of the spiral guide vane (14) increases along the airflow direction.

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