Heat dissipation device of treadmill motor and intelligent heat dissipation method thereof

Abstract

The invention discloses a heat dissipation device for a treadmill motor and an intelligent heat dissipation method, and aims to solve the technical problems that in the prior art, the heat dissipation effect and dustproof protection cannot be considered at the same time, an external power supply is needed for driving, response lags and the like. The heat dissipation device comprises an energy collection and conversion structure, a transmission execution mechanism and a heat dissipation assembly. The energy collection and conversion structure collects mechanical vibration during running of the treadmill through an air blowing lever and converts the vibration into air pressure energy through an energy conversion air pump. The transmission executing mechanism transmits air pressure energy to the executing air cylinder through an air pipeline, and the executing air cylinder drives the sliding connecting rod to generate linear motion. The heat dissipation assembly comprises a heat dissipation protection cover installed on the outer wall of the motor in a sliding mode, and accurate alignment or tight sealing of the heat dissipation protection cover and strip-shaped heat dissipation holes of the motor is achieved through driving of a sliding connecting rod. According to the device, vibration energy generated during running of the running machine is used for driving the heat dissipation protection cover to be opened and closed, and intelligent switching between motor heat dissipation and dustproof protection is achieved.

Description

Technical Field

[0001] This invention relates to the field of fitness equipment technology, and in particular to a heat dissipation device for a treadmill motor and its intelligent heat dissipation method. Background Technology

[0002] Currently, treadmill motor cooling mainly employs two methods: passive cooling and active cooling. Passive cooling increases the heat dissipation area by installing heat dissipation fins or vents on the motor casing. While simple in structure, its cooling effect is limited, and the vents' constant openness allows dust to easily enter the motor. Active cooling uses forced convection via fans, offering better cooling performance but suffers from high energy consumption, high noise levels, and poor reliability.

[0003] Chinese utility model patent CN216774529U discloses a motor cooling device for treadmills, including a mounting housing, an electric push rod, and a baffle. The electric push rod drives the baffle to move, controlling the opening and closing of ventilation holes to switch between heat dissipation and dust prevention. This solution resolves the contradiction between heat dissipation and dust prevention to some extent, but it still has the following shortcomings: Energy consumption issue: The electric linear actuator requires continuous power supply to drive it, which increases the system's power consumption.

[0004] Response lag: It relies on the electrical control system to determine heat dissipation needs and cannot achieve real-time response.

[0005] Complex control: It requires additional control circuits and sensors, which increases system complexity and the risk of failure.

[0006] Lack of intelligence: It cannot control heat dissipation based on the actual operating status and load of the motor.

[0007] In summary, the core problem facing existing heat dissipation technologies is the contradiction between heat dissipation requirements and dust protection, as well as the inability to intelligently adjust the heat dissipation effect according to the actual operating conditions of the motor. With increasing demands for energy conservation and environmental protection, and rising expectations for user experience, there is a need to develop a new heat dissipation technology that can utilize the treadmill's own operating energy, achieve intelligent switching between heat dissipation and dust protection, require no external power supply, and has a rapid response. Summary of the Invention

[0008] To address the dual needs of existing treadmill motors—requiring sufficient heat dissipation during operation and dust protection when not in use—as well as the technical problems of traditional heat dissipation devices requiring external power supply and being unable to intelligently adjust heat dissipation based on the actual operating status of the motor, this invention provides a heat dissipation device for treadmill motors and its intelligent heat dissipation method.

[0009] To address the aforementioned problems, the present invention provides a heat dissipation device for a treadmill motor, comprising an energy harvesting and conversion structure, a transmission actuator, and a heat dissipation component.

[0010] The energy harvesting and conversion structure includes an air lever for collecting mechanical vibrations and an energy conversion pump for converting vibrations into air pressure. One end of the air lever is hinged to the frame shell of the treadmill, and the other end is hinged to the energy conversion pump, realizing the conversion of mechanical vibrations into air pressure energy when the treadmill is running.

[0011] The transmission actuator includes a gas pipe for transmitting pneumatic energy, an actuator cylinder for converting pneumatic energy into mechanical thrust, and a sliding link for transmitting the thrust to the heat dissipation assembly.

[0012] The heat dissipation assembly includes two heat dissipation protective covers. The heat dissipation protective covers are connected to the sliding connecting rod and slidably installed on the outer wall of the motor. The heat dissipation protective covers are provided with a first heat dissipation through hole. The sliding connecting rod drives the cover to align with or seal the strip heat dissipation hole of the motor.

[0013] The above structure utilizes the vibration energy generated during treadmill operation to automatically drive the opening and closing of the heat dissipation protective cover, achieving intelligent switching between motor heat dissipation and dust protection. It can adaptively adjust the heat dissipation effect according to the motor's operating status without the need for an external power source.

[0014] Preferably, the transmission actuator further includes a delay control structure, which is integrated inside the actuator cylinder. This delay control structure includes two independent air pressure chambers: a front air chamber and a rear air chamber. The preset air pressure of the front air chamber is controlled by a gas injection valve. When the accumulated air pressure of the rear air chamber is greater than the preset air pressure of the front air chamber, the piston rod of the actuator cylinder is pushed to move.

[0015] Preferably, the delay time of the delay control structure can be adjusted according to the preset air pressure of the front airbag, and the delay time range is 30 seconds to 5 minutes.

[0016] Preferably, the gas injection valve is a pilot-operated electromagnetic pulse valve, which is associated with the speed sensor signal of the treadmill through the PLC controller. When the motor speed is detected to exceed the set value, the PLC automatically closes the gas injection valve to put the system into the instant heat dissipation mode; when the speed is lower than the set value, the gas injection valve is opened to enter the delayed heat dissipation mode.

[0017] Preferably, an electrically controlled two-way valve and a pressure regulating valve are provided in the air path between the energy conversion air pump and the rear airbag. The electrically controlled two-way valve adopts a normally closed design and is used to control the air intake and degassing of the rear airbag.

[0018] Preferably, the present invention also provides an intelligent heat dissipation method for a treadmill motor based on the above-mentioned heat dissipation device, including a usage status identification step and a multi-level heat dissipation opening control step. The usage status identification step identifies the treadmill's usage status through multi-parameter fusion, sets a piezoelectric sensor below the treadmill deck to collect vibration signals and performs frequency analysis, adds a current detection module to the motor drive circuit to monitor the operating current in real time, and sets a temperature sensor array on the outer wall of the motor to monitor temperature changes. The vibration frequency, load coefficient, and temperature gradient are input into a decision matrix to generate a motor operating status score S-value. The multi-level heat dissipation opening control step uses a dual-cylinder differential control structure to achieve five levels of heat dissipation opening control, establishing a piecewise mapping relationship between the S-value and the heat dissipation opening.

[0019] Preferably, in the multi-level heat dissipation opening control step, the heat dissipation opening is divided into five levels: 0%, 25%, 50%, 75%, and 100%. The mapping relationship between the S value and the heat dissipation opening is as follows: S∈[0,30] corresponds to 0% opening, S∈(30,50] corresponds to 25% opening, S∈(50,70] corresponds to 50% opening, S∈(70,90] corresponds to 75% opening, and S∈(90,100] corresponds to 100% opening.

[0020] Preferably, it also includes energy harvesting optimization steps: improving the air blower lever to a multi-point acquisition array to achieve bidirectional energy harvesting, adding a miniature pneumatic storage tank with a volume of 80ml and a working pressure of 0.5MPa, and setting an adaptive pressure regulating valve to dynamically adjust the release pressure of the energy storage tank according to the motor temperature and S value.

[0021] Preferably, it also includes intelligent dust protection steps: a dust concentration sensor is added inside the frame housing to adaptively adjust the sealing pressure of the heat dissipation protective cover according to the dust concentration; after the treadmill is not used, the system automatically executes the cleaning procedure of the heat dissipation protective cover.

[0022] Preferably, in the usage status recognition step, the vibration signal frequency analysis includes: distinguishing the frequency range of 1-2Hz for walking mode, the frequency range of 2-3Hz for jogging mode, and the frequency range of 3-5Hz for running mode; forcibly executing 100% opening for heat dissipation when the motor temperature exceeds 85℃; and setting a hysteresis threshold of ±5 to avoid frequent switching of heat dissipation opening.

[0023] Compared with the prior art, the heat dissipation device and intelligent heat dissipation method for the treadmill motor provided by the present invention have the following beneficial effects: This invention achieves fully automated control of the treadmill motor cooling system through vibration energy harvesting and air pressure conversion technology. The core technology involves converting the mechanical vibrations generated by user movement into air pressure energy via a lever amplification mechanism, and then intelligently adjusting the cooling timing based on the actual operating status of the motor using a dual-airbag delay control structure. This system solves the problems commonly found in traditional motor cooling solutions, such as high energy consumption, slow response, and inability to simultaneously provide dust protection.

[0024] In terms of technical implementation, this invention employs a three-level energy conversion mechanism (vibration energy → air pressure energy → mechanical displacement), coupled with a multi-parameter fusion state recognition algorithm, to accurately distinguish between different movement modes of the user, such as walking, jogging, and running, and generate a motor operating status score accordingly, achieving five-level control of heat dissipation opening. By setting an adjustable delay control from 30 seconds to 5 minutes, the system can avoid unnecessary heat dissipation when the motor is running under low load, activating the heat dissipation channel only when the motor temperature rises above 40°C, achieving energy savings of approximately 25% compared to traditional solutions.

[0025] In terms of reliability, this invention incorporates a comprehensive safety protection mechanism, including automatic gas release function of the electrically controlled two-way valve, pressure protection of the pressure regulating valve, and forced heat dissipation when the temperature exceeds the limit, among other safety measures, to ensure stable operation of the system under various working conditions. The miniature air pressure storage tank solves the matching problem between instantaneous high energy input and continuous heat dissipation requirements, enabling the system to adapt to a full range of exercise loads, from light walking to high-intensity running. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the intelligent heat dissipation device applied to a treadmill in Example 1; Figure 2 This is a schematic diagram of the bottom structure of the intelligent heat dissipation device in Example 1 when it is applied to a treadmill; Figure 3 This is a partial cross-sectional view of the intelligent heat dissipation device applied to a treadmill in Example 1; Figure 4 This is a partial structural diagram of the intelligent heat dissipation device applied to a treadmill in Example 1; Figure 5 This is a schematic diagram of the intelligent heat dissipation device in Example 1; Figure 6 for Figure 5 A magnified view of a section at point I; Figure 7 This is a disassembly diagram of the intelligent heat dissipation device in Example 1; Figure 8 The overall control system architecture for the automatic intelligent cooling device for treadmill motors; Figure 9 A complete workflow for intelligent heat dissipation methods for treadmill motors; Figure 10 The internal structure and signal flow of a multi-level heat dissipation control system; Figure 11 This is a schematic diagram of the automatic mode switching of the PLC control system. Figure 12 This is a schematic diagram of an intelligent dust protection system.

[0027] Reference numerals: Frame housing 10, Support frame part 101, Frame part 102, Energy harvesting and conversion structure 20, Transmission actuator 30, Heat dissipation assembly 40, Tension adjustment device 50, Motor 11, Belt 12, Blower lever 21, Energy conversion air pump 22, Gas pipe 31, Actuation cylinder 32, Sliding connecting rod 33, Delay control structure 34, Heat dissipation protective cover 41, Fixed clamping plate 51, Tension adjustment structure 52, Support movable structure 53, Strip-shaped heat dissipation hole 111, Front airbag 341, Rear airbag 342, First heat dissipation through hole 411, Second heat dissipation through hole 511, Connection fixing hole 512, Adjusting screw 521, T-shaped adjusting nut 522, Adjusting adaptation plate 523, Adjusting hinge assembly 531, Connecting plate 532, Movable hole 5231, Hinge seat 5311, Hinge sleeve 5312. Detailed Implementation

[0028] Example 1: This embodiment provides an automatic intelligent heat dissipation device and method for treadmill motors. Addressing the dual needs of existing treadmill motors—requiring sufficient heat dissipation during operation and dust protection when not in use—this device utilizes the vibration energy generated by the user exercising on the treadmill. Through lever amplification and air pressure conversion technology, the mechanical vibration energy is converted into air pressure energy, which then drives the opening and closing of the heat dissipation protective cover. This device not only achieves automatic switching between motor heat dissipation and dust protection but also intelligently adjusts the heat dissipation timing based on motor speed and load status through a delay control structure in a dual air pressure control loop, avoiding unnecessary heat dissipation during low-load operation.

[0029] refer to Figures 1-7 The automatic intelligent heat dissipation device is installed inside the frame housing 10 of the treadmill and is designed for a motor 11 whose housing has strip-shaped heat dissipation holes 111 (such as...). Figure 7 (As shown). Unlike conventional motor housings that have side-mounted heat dissipation holes or use protruding fins to expand the heat dissipation area, this motor housing features a strip-shaped heat dissipation hole design with a length-to-width ratio of 8:1 to 12:1. The opening and closing of these strip-shaped heat dissipation holes can be controlled by sliding the heat dissipation protective cover. This design offers better dustproof sealing compared to traditional finned structures, while avoiding the problems of dust accumulation and cleaning difficulties associated with finned structures in operating environments.

[0030] The device employs a three-stage energy conversion mechanism—vibration energy → air pressure energy → mechanical displacement—to achieve intelligent control. This intelligent control is realized through the energy harvesting and conversion structure 20, the transmission actuator 30, and the heat dissipation component 40. The system is designed with a dual air pressure control loop. The main loop is responsible for driving the opening and closing of the heat sink, while the auxiliary loop implements a delay control function. The two loops work independently yet in coordination, ensuring reliable response under different operating conditions. The specific design of each component structure is as follows: First, the energy harvesting and conversion structure 20 collects running vibrations via an air-blowing lever 21. One end of the air-blowing lever 21 is hinged to the ground-mounted support frame portion 101 of the frame housing 10, and this hinge point serves as a fixed fulcrum for stability. The other end of the air-blowing lever 21 is connected to the piston rod of the energy conversion air pump 22 via a movable hinge, which has a certain range of motion to accommodate the swing amplitude of the lever. When the user exercises on the treadmill, the frame portion 102 (or deck) where the running belt is installed vibrates up and down. This vibration causes the frame portion 102 to contact a position near the air pump connection end on the air-blowing lever 21, converting the up-and-down amplitude generated during running into the reciprocating up-and-down motion of the piston rod inside the energy conversion air pump 22 through lever transmission, thereby converting mechanical vibration energy into air pressure energy. See [link to relevant documentation]. Figure 3 .

[0031] Secondly, the transmission actuator 30 includes a gas pipe 31, an actuator cylinder 32, and a sliding connecting rod 33. The gas pipe 31 connects the energy conversion air pump 22 and the actuator cylinder 32 (only the part of the gas pipe connected to the actuator cylinder is shown in the figure; the rest is not shown). The actuator cylinder 32 is connected to the sliding connecting rod 33 via its piston rod, converting air pressure energy into linear motion. See [reference needed] Figure 4 Furthermore, the actuator cylinder 32 can be a double-acting design, for example, with a stroke of 30mm, capable of driving the heat dissipation shield to switch between fully closed and fully open. The sliding linkage 33 is made of stainless steel to ensure durability in humid environments within the rack housing.

[0032] Finally, the heat dissipation assembly 40 consists of two heat dissipation protective covers 41. Both heat dissipation protective covers 41 are connected to the sliding connecting rod 33 and are slidably installed on the outer wall of the motor 11. A first heat dissipation through hole 411 is provided on it. Through the driving of the sliding connecting rod 33, the cover is aligned with or tightly sealed with the strip heat dissipation hole 111 of the motor 11.

[0033] The delay control structure 34, as a key component of the transmission actuator 30, includes a front airbag 341, a rear airbag 342, and an actuator cylinder 32. These three components are connected via air lines to form a complete delay control system. Specifically, the front airbag 341 controls a preset air pressure via a gas injection valve and communicates with the front chamber of the actuator cylinder 32 via a connecting pipe, creating backward resistance on the piston. The rear airbag 342 receives compressed gas from the energy conversion pump 22 and communicates with the rear chamber of the actuator cylinder 32 via a connecting pipe, used to accumulate pushing air pressure. The front chamber of the actuator cylinder 32 is connected to the front airbag 341 to maintain the preset resistance, and the rear chamber is connected to the rear airbag 342 to receive pushing air pressure. The piston rod is connected to the sliding connecting rod 33 to output linear motion. When the accumulated air pressure in the rear airbag 342 exceeds the preset air pressure of the front airbag 341, the pressure difference pushes the piston rod of the actuator cylinder 32 to move, causing the heat dissipation shield 41 to open. This air pressure accumulation process achieves time delay control from the start of the motor 11 to the opening of the heat dissipation shield. The delay time can be adjusted according to the preset air pressure of the front airbag 341, for example, in the range of 30 seconds to 5 minutes.

[0034] The purpose of this delay control structure 34 is to intelligently control the timing of heat dissipation based on the actual operating state and load of the motor 11. When the motor 11 is running at low speed or idling, the heat generation is small (temperature rise less than 20°C), so the system does not open the heat dissipation channel to avoid unnecessary opening of the dust cover; only when the motor 11 generates more heat (temperature rise exceeds 40°C) under high speed and continuous load operation will the heat dissipation channel be opened in a timely manner, thereby achieving heat dissipation on demand and improving the rationality of system response and energy saving effect.

[0035] Reference Figure 11 In this embodiment, the gas injection valve can be a pilot-operated electromagnetic pulse valve, which is associated with the treadmill's speed sensor signal through a PLC controller to automatically determine the speed threshold. When the motor speed exceeds the set value (e.g., 1200 rpm), the PLC automatically closes the gas injection valve, putting the system into an immediate cooling mode; when the speed is lower than the set value, the gas injection valve opens to enter a delayed cooling mode. The gas injection valve uses an internal self-supplying gas source, with a pre-installed compressed gas tank with a capacity of 200 ml and a working pressure of 0.2 MPa, allowing for more than 500 continuous operations, meeting the long-term use requirements of the treadmill.

[0036] Furthermore, to ensure the ease of use and safety of the automatic intelligent heat dissipation device, an electrically controlled two-way valve and a pressure regulating valve (neither of which are shown in the figure) are installed in the air path between the energy conversion air pump 22 and the rear airbag 342. The electrically controlled two-way valve adopts a normally closed design and is used to control the air intake and exhaust of the rear airbag 342. When the treadmill is not used for more than 10 minutes, the electrically controlled two-way valve automatically opens the exhaust function, causing the heat dissipation protective cover 41 to return to the closed state, ensuring dust protection for the motor 11. The pressure regulating valve is set with a safety threshold to ensure that the air pressure in the air path does not exceed the system's safe tolerance value, thereby avoiding damage to pneumatic components due to excessive intake pressure caused by prolonged or strenuous exercise. A pressure gauge is also included for easy pressure monitoring during maintenance.

[0037] Furthermore, to ensure sufficient heat dissipation for the motor 11 when needed, the first heat dissipation through-hole 411 is designed in a strip shape, with dimensions of 40mm in length and 5mm in width. Its effective heat dissipation area is 15% larger than that of the strip-shaped heat dissipation hole 111 of the motor 11, ensuring that the heat dissipated from the motor 11 through the strip-shaped heat dissipation hole 111 can be completely discharged through the first heat dissipation through-hole 411. In addition, a 1-2mm alignment tolerance is designed between the first heat dissipation through-hole 411 and the strip-shaped heat dissipation hole 111, ensuring good heat dissipation channel connectivity even under slight installation errors or thermal expansion and contraction. The sliding stroke of the heat dissipation protective cover 41 is calculated to ensure complete overlap between the first heat dissipation through-hole 411 and the strip-shaped heat dissipation hole 111 in the open state, and 100% coverage in the closed state.

[0038] refer to Figure 4 , Figures 6-7 In this embodiment, the motor 11 transmits power to the running belt via the belt 12. To ensure the stability of force transmission, a tension adjustment device 50 is provided. It is worth noting that the automatic intelligent heat dissipation device in this embodiment is closely related to the stable operation of the motor 11, because the operating state of the motor 11 directly affects the heat dissipation requirements and the operating frequency of the heat dissipation device. When the belt is slack, it may cause uneven motor operation under load, with speed fluctuations exceeding ±5%, which in turn affects the stability and frequency consistency of the vibration collected by the air blower lever 21.

[0039] The tension adjustment device 50 includes two fixed clamping plates 51, a tension adjustment structure 52, and a supporting movable structure 53. The tension adjustment structure 52 drives the motor 11 to move slightly around the supporting movable structure, thereby tensioning the belt. The specific structure is as follows: Two fixed clamping plates 51 serve as connecting transition parts for the tension adjustment device 50, connecting and fixing the motor 11, tension adjustment structure 52, and support movable structure 53 together. The two fixed clamping plates 51 are assembled and wrapped around the outer wall of the motor 11. Both fixed clamping plates 51 are provided with connecting and fixing holes 512 to realize the connection and fixing of the two fixed clamping plates 51. The tension adjustment structure 52 includes an adjustment screw 521, a T-shaped adjustment nut 522, and an adjustment adaptation plate 523. One end of the T-shaped adjustment nut 522 is detachably connected to the two connecting fixing holes 512 by bolts, and the other end is movably connected to the adjustment screw 521 by threads. The adjustment adaptation plate 523 is connected to the frame housing 10 and is provided with a movable hole 5231. The adjustment screw 521 with a screw head passes through the movable hole 5231 to realize the support of the adjustment adaptation plate 523 for the adjustment screw 521, and at the same time, the adjustment screw 521 can move within the movable hole 5231 with thread adjustment. The supporting movable structure 53 includes an adjustable hinge assembly 531 and a connecting plate 532. The adjustable hinge assembly 531 includes a hinge seat 5311 with a hinge shaft and a hinge sleeve 5312 movably sleeved on the hinge shaft. The hinge seat 5311 is connected to the frame housing 10. The hinge sleeve 5312 and the connecting plate 532 are fixedly connected by welding. The connecting plate 532 is formed on one of the fixed clamping pieces 51.

[0040] The working process of the above-mentioned tension adjustment device 50 is as follows: The adjusting screw 521 is passed through the movable hole 5231 and threadedly connected to the T-shaped adjusting nut 522. At the same time, the two fixed clamping plates 51 are spliced ​​and installed on the outer wall of the motor 11. During assembly, the second heat dissipation through hole 511 on the fixed clamping plate 51 corresponds one-to-one with the strip heat dissipation hole 111 on the motor 11. Then, the T-shaped adjusting nut 522 is connected and fixed to the two connecting fixing holes 512 by bolts, so as to realize the connection and fixation of the two fixed clamping plates 51, the motor 11 and the tension adjustment structure 52. Then, the adjusting screw 521 is rotated to pull the motor 11. The motor 11 rotates slightly around the hinge axis through the connecting plate 532 and the hinge sleeve 5312, so as to realize the movement of the motor 11, thereby tensioning the belt 12 used to transmit the power of the motor 11.

[0041] To ensure that the installation of the two fixed clamping plates 51 does not affect the heat dissipation of the motor 11, each of the two fixed clamping plates 51 has multiple strip-shaped second heat dissipation through holes 511. When the two fixed clamping plates 51 are installed, the second heat dissipation through holes 511 on them correspond one-to-one with the strip-shaped heat dissipation holes 111 on both sides of the motor 11. The two heat dissipation protective covers 41 are slidably connected to the two fixed clamping plates 51. The size of the second heat dissipation through holes 511 matches that of the first heat dissipation through holes 411. As the heat dissipation protective cover 41 slides, the first heat dissipation through holes 411 gradually becomes fully connected with the second heat dissipation through holes 511 and the strip-shaped through holes of the motor 11, thereby achieving heat dissipation.

[0042] The specific working process and heat dissipation method of the automatic intelligent heat dissipation device in this embodiment are as follows: When the treadmill is not in use, the gas injection valve is closed, there is no pre-filled gas in the front airbag 341, the air passage connected to the rear end of the actuator cylinder 32 is open, and there is no pre-filled gas at the rear end of the actuator cylinder 32. At this time, the air pressure at the front and rear ends of the actuator cylinder 32 is the same. When the motor 11 rotates at a high speed and requires immediate heat dissipation after it is turned on, the gas injection valve is still closed to keep the air pressure at the front and rear ends of the actuator cylinder 32 consistent. Therefore, when the user runs on the treadmill and generates vibration, the vibration causes the blower lever 21 to rotate slightly up and down repeatedly, thereby causing the blower lever 21 to drive the piston rod of the energy conversion pump 22 to move up and down, compressing the gas. The gas is delivered to the rear end of the actuator cylinder 32 through the gas pipe 31, making the air pressure at the rear end of the actuator cylinder 32 greater than the air pressure at the front end, thereby pushing the piston rod of the actuator cylinder 32 to move. The piston rod drives the sliding connecting rod 33 to move, and the sliding connecting rod 33 drives the heat dissipation protective cover 41 to move, so that the second heat dissipation through hole 511 on it is aligned with the first heat dissipation through hole 411 and the strip heat dissipation hole 111 of the motor 11, thereby achieving heat dissipation of the motor 11. When the motor 11 rotates at a low speed, it can delay heat dissipation. At this time, the gas injection valve is opened to fill the pre-installed gas into the front airbag 341, so that the front airbag 341, i.e. the front end of the actuator cylinder 32, has a certain air pressure. Therefore, when the vibration generated by the user running is converted into gas and delivered to the rear airbag 342, and only when the air pressure accumulated in the rear airbag 342 is greater than the air pressure in the front airbag can the piston rod of the actuator cylinder 32 be pushed to move. The piston rod drives the heat dissipation protective cover 41 to move through the sliding connecting rod 33 to open the strip heat dissipation hole 111, thereby achieving heat dissipation of the motor 11.

[0043] Example 2: This embodiment provides an intelligent heat dissipation method for treadmill motors. Based on the automatic intelligent heat dissipation device of Embodiment 1, this method further optimizes the control logic and working mode of the heat dissipation device, realizing more accurate perception of the treadmill's usage status and more efficient heat dissipation control.

[0044] refer to Figures 8-10 The intelligent heat dissipation method in this embodiment includes the following steps: 1. Using state recognition steps The treadmill's usage status is identified through multi-parameter fusion: a piezoelectric sensor is placed below the treadmill deck to collect vibration signals and perform frequency analysis to distinguish between walking mode (1-2Hz), jogging mode (2-3Hz), and running mode (3-5Hz); a current detection module is added to the motor drive circuit to monitor the operating current in real time and calculate the load factor; a temperature sensor array is set on the outer wall of the motor to monitor the absolute temperature and temperature change gradient dT / dt; the vibration frequency, load factor, and temperature gradient are input into the decision matrix to generate a motor operating status score S value (S∈[0,100]).

[0045] 2. Multi-stage heat dissipation opening control steps A dual-cylinder differential control structure is used to achieve five levels of heat dissipation opening control (0%, 25%, 50%, 75%, 100%). A piecewise mapping relationship between the S value and the heat dissipation opening is established: S∈[0,30] corresponds to 0% opening, S∈(30,50] corresponds to 25% opening, S∈(50,70] corresponds to 50% opening, S∈(70,90] corresponds to 75% opening, and S∈(90,100] corresponds to 100% opening. A hysteresis threshold of ±5 is set to avoid frequent switching. When the motor temperature exceeds 85℃, 100% opening for heat dissipation is forcibly executed.

[0046] 3. Energy Harvesting Optimization Steps The air-blowing lever was improved into a multi-point acquisition array to achieve bidirectional energy harvesting; a miniature pneumatic storage tank with a volume of 80ml and a working pressure of 0.5MPa was added to store energy during instantaneous high energy input and release it during peak demand periods; an adaptive pressure regulating valve was set to dynamically adjust the energy storage tank release pressure according to the motor temperature and S value.

[0047] 4. Intelligent dust protection procedures refer to Figure 12 A laser scattering dust concentration sensor is added 200mm from the motor inside the frame housing. This sensor uses an infrared laser diode as the light source and determines the dust concentration by detecting the intensity of scattered light from dust particles with a diameter of 0.3-10μm. The detection accuracy reaches 1μg / m³. The sensor is connected to a gas injection valve in the delay control structure, which adaptively adjusts the sealing pressure of the heat dissipation protective cover according to the dust concentration: when the detected dust concentration exceeds 50μg / m³, the system automatically increases the preset air pressure of the front airbag by 0.05MPa to improve the sealing pressure. When the dust concentration is below 20μg / m³, the preset air pressure is appropriately reduced by 0.02MPa to reduce sealing resistance while ensuring dust prevention. After the treadmill is stopped, the system automatically executes the cleaning program of the heat dissipation protective cover after a 30-second delay. This includes three opening and closing cycles, each lasting 2 seconds. First, the preset air pressure of the front airbag is released to loosen the heat dissipation protective cover. Then, the heat dissipation protective cover is fully opened for 0.5 seconds and fully closed for 0.5 seconds through rapid inflation and deflation. The vibration and airflow generated during the opening and closing process effectively remove the dust accumulated around the heat dissipation holes.

[0048] 5. Energy-saving optimization steps A micro turbine generator is added to the exhaust end of the cylinder to convert exhaust energy into electrical energy for the control circuit; intelligent sleep control is set up, and the system enters a low-power mode when no use is detected for 30 consecutive minutes; the optimal heat dissipation start time is automatically calculated based on the ambient temperature to achieve coordinated control of preheating and heat dissipation.

[0049] Through the above-described intelligent heat dissipation method, this embodiment achieves a high degree of intelligence in heat dissipation control, which can be adjusted according to the actual working state of the motor and environmental conditions, thereby optimizing energy utilization efficiency and extending the service life of the motor.

Claims

1. A heat dissipation device for a treadmill motor, characterized in that, include: The energy harvesting and conversion structure (20) includes an air lever (21) for harvesting mechanical vibrations and an energy conversion pump (22) for converting vibrations into air pressure. One end of the air lever (21) is hinged to the frame housing (10) of the treadmill, and the other end is hinged to the energy conversion pump (22). The transmission actuator (30) includes a gas pipe (31) for transmitting pneumatic energy, an actuator cylinder (32) for converting pneumatic energy into mechanical thrust, and a sliding link (33) for transmitting thrust to a heat dissipation assembly. The heat dissipation assembly (40) includes two heat dissipation protective covers (41). The heat dissipation protective covers (41) are connected to the sliding connecting rod (33) and slidably installed on the outer wall of the motor (11). The heat dissipation protective covers (41) are provided with a first heat dissipation through hole (411). The sliding connecting rod (33) drives the precise alignment or tight sealing with the strip heat dissipation hole (111) of the motor (11). The above structure utilizes the vibration energy generated during treadmill operation to automatically drive the opening and closing of the heat dissipation protective cover, achieving intelligent switching between motor heat dissipation and dust protection.

2. The heat dissipation device for a treadmill motor according to claim 1, characterized in that, The transmission actuator (30) also includes a delay control structure (34), which is integrated inside the actuator cylinder (32). The delay control structure (34) includes two independent air pressure chambers: a front airbag (341) and a rear airbag (342). The preset air pressure of the front airbag (341) is controlled by a gas injection valve. When the air pressure accumulated in the rear airbag (342) is greater than the preset air pressure at the front, the piston rod of the actuator cylinder (32) is pushed to move.

3. The heat dissipation device for a treadmill motor according to claim 2, characterized in that, The delay time of the delay control structure (34) can be adjusted according to the preset air pressure of the front airbag (341), and the delay time range is 30 seconds to 5 minutes.

4. The heat dissipation device for a treadmill motor according to claim 2, characterized in that, The gas injection valve is a pilot-operated electromagnetic pulse valve, which is associated with the speed sensor signal of the treadmill through the PLC controller. When the motor speed is detected to exceed the set value, the PLC automatically closes the gas injection valve to put the system into the instant heat dissipation mode; when the speed is lower than the set value, the gas injection valve is opened to enter the delayed heat dissipation mode.

5. The heat dissipation device for a treadmill motor according to claim 1, characterized in that, An electrically controlled two-way valve and a pressure regulating valve are provided in the air path between the energy conversion air pump (22) and the rear airbag (342). The electrically controlled two-way valve adopts a normally closed design and is used to control the air intake and air release of the rear airbag (342).

6. A method for intelligent heat dissipation of a treadmill motor based on the heat dissipation device for a treadmill motor as described in claim 1, characterized in that, Includes the following steps: Usage status recognition steps: The treadmill usage status is identified by multi-parameter fusion. A piezoelectric sensor is set under the treadmill deck to collect vibration signals and perform frequency analysis. A current detection module is added to the motor drive circuit to monitor the working current in real time. A temperature sensor array is set on the outer wall of the motor to monitor temperature changes. The three parameters of vibration frequency, load coefficient and temperature gradient are input into the decision matrix to generate the motor working status score S value. Multi-level heat dissipation opening control steps: A dual-cylinder differential control structure is adopted to achieve five-level precise control of the heat dissipation opening, and a segmented mapping relationship between the S value and the heat dissipation opening is established.

7. The intelligent heat dissipation method for a treadmill motor according to claim 6, characterized in that, In the multi-level heat dissipation opening control step, the heat dissipation opening is divided into five levels: 0%, 25%, 50%, 75%, and 100%. The mapping relationship between the S value and the heat dissipation opening is as follows: S∈[0,30] corresponds to 0% opening, S∈(30,50] corresponds to 25% opening, S∈(50,70] corresponds to 50% opening, S∈(70,90] corresponds to 75% opening, and S∈(90,100] corresponds to 100% opening.

8. The intelligent heat dissipation method for a treadmill motor according to claim 6, characterized in that, It also includes energy harvesting optimization steps: improving the air blower lever to a multi-point acquisition array to achieve bidirectional energy harvesting, adding a miniature pneumatic storage tank with a volume of 80ml and a working pressure of 0.5MPa, and setting an adaptive pressure regulating valve to dynamically adjust the energy storage tank release pressure according to the motor temperature and S value.

9. The intelligent heat dissipation method for a treadmill motor according to claim 6, characterized in that, It also includes intelligent dust protection steps: a dust concentration sensor is added inside the frame housing to adaptively adjust the sealing pressure of the heat dissipation protective cover according to the dust concentration; after the treadmill is not used, the system automatically executes the cleaning procedure of the heat dissipation protective cover.

10. The intelligent heat dissipation method for a treadmill motor according to claim 6, characterized in that, In the usage status identification step, the vibration signal frequency analysis includes: distinguishing the frequency range of 1-2Hz for walking mode, the frequency range of 2-3Hz for jogging mode, and the frequency range of 3-5Hz for running mode; forcibly executing 100% opening for heat dissipation when the motor temperature exceeds 85℃; and setting a hysteresis threshold of ±5 to avoid frequent switching of heat dissipation opening.

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