TWI569853B - The active transmission structure of the treadmill - Google Patents

Description

Active transmission structure of treadmill

The invention relates to a device for a treadmill, in particular to an active transmission structure of a treadmill.

At present, there are a variety of treadmills, one of which has a stepping treadmill that only uses the inertia wheel to take the reverse thrust of the running belt, and the inertia wheel assists the running belt to rotate. The faster the turning speed is, that is, the runner's running speed. The faster, but the inertia wheel's gravitational acceleration due to the rotation of the breeding, so that the runner wants to stop during the running, will not be able to quickly stop the running of the running belt, and the runner will stop the running movement at this time, which will cause the throwing Danger.

In order to eliminate the aforementioned, an electric treadmill has been developed. The power of the conventional electric treadmill adopts a single motor and a single steering as a power source, and the traction belt of the treadmill is used, and the power source is nothing more than a DC motor. Or AC variable frequency motor. However, it is known that the DC motor can provide a limited range of rotational speed and cannot be expanded indefinitely. Although the AC variable frequency motor has a wide dynamic range, at very low frequencies (low speed), the rotor flux of the motor is extremely saturated, resulting in AC variable frequency motors are difficult to control and may even burn. Therefore, when the AC variable frequency motor is used at a low frequency, the inverter will automatically reduce the voltage applied to the motor, so that the torque will be greatly reduced. For the AC variable frequency motor, 120HZ or less is applied to the "fixed torque", and 120Hz or more is applied to the "fixed power". Therefore, when the frequency is higher than 120HZ, the motor cannot maintain the high liquid quasi-torque output. This limits the range of speed output to a considerable extent.

Therefore, the treadmill power source, whether using a DC motor or an AC variable frequency motor, has to make a trade-off. For example, the very low speeds used in rehabilitation use, the power source must abandon the high-speed implementation, and exclude the use group of high-speed running. Conversely, if you want to implement high-speed output, you must abandon the low-speed rehabilitation group. In order to reduce the limitations derived from the above situation, the treadmills used in rehabilitation use will use AC variable frequency motors with a wide range of speed output to meet the extremely low speed requirements for rehabilitation and the high speed requirements for fitness. .

Since the above-mentioned treadmills must be driven by a motor, power is required, which is not only energy-saving and environmentally friendly, but also limited by the venue; further, the electric treadmill can only regulate the running belt rotation. The speed of the runners, the runners running at the speed of regulation, therefore, can only train their cardiopulmonary function, can not balance the muscle strength of training the feet, but also its shortcomings.

Due to the aforementioned two treadmills, one level treadmill is dangerous, and the other electric treadmill only has cardiopulmonary training, and requires a circuit board, a control panel and a motor, which are relatively high in cost; A magnetic control treadmill; the magnetic control treadmill uses a magnetically controlled wheel as a resistance regulation, but cannot control the speed of the speed, and the training muscle strength can not be arbitrary, and the operation is also quite inconvenient, because it cannot be adjusted according to the needs of the runner. Resistance for muscle strength training.

In order to solve the above problems, the present invention provides an active transmission structure of a treadmill. Since the vertical position of the second rotating shaft is lower than the vertical position of the first rotating shaft, the side view of the running belt is front high, low, and concave. The structure of the arc allows the user to use his own gravity and the aforementioned structure of the front high and then low and concave arc during running, which can automatically slide down and then pass through The first rotating shaft drives the inertia wheel to rotate inertially, and when the user slows down, the inertia wheel can be decelerated by the resistance of the damping unit, and the motor drive can be omitted, and no power is needed, thereby achieving environmental protection and safety. The efficacy is not limited by the venues that must have electricity supply, and the dual benefits of both cardio and muscle training.

In order to achieve the above object, the present invention provides an active transmission structure for a treadmill, comprising a first rotating shaft having a first end and a second end; and an inertia wheel fixed to the first end of the first rotating shaft or Either end of the second end; and a damping unit fixed to either end of the second end or the first end of the first rotating shaft.

The transmission structure further includes a second rotating shaft disposed parallel to and spaced apart from the first rotating shaft, and wrapping the first rotating shaft and the second rotating shaft by a running belt.

The transmission structure further includes a buffer plate disposed between the first rotating shaft and the second rotating shaft, and disposed in the wound running belt, so that the runner brings the frictional thrust generated by the running belt to the first The two rotating shafts rotate synchronously to synchronously drive the inertia wheel and the damping unit to rotate.

In some embodiments, the damping unit is a blower fan.

The aforementioned blower fan provides a wind blower for the blades of the blower fan, so that the running running belt can naturally stop rotating when the runner stops running to improve the safety of the runner.

In the foregoing fan fan, liquid or sand may be filled to make the blades of the blower fan move liquid or sand to enhance the damping effect.

In some embodiments, the damper unit is a pulley, a linkage belt, and a blower fan. The pulley is pivotally connected to the second end of the first rotating shaft, and the blower fan and the pulley are spaced apart from each other. The linkage belt is disposed around the pulley and the blower fan such that the pulley is interlocked with the blower fan.

In some embodiments, the vertical position of the second shaft is lower than the vertical position of the first shaft.

100‧‧‧Active drive structure for treadmills

10‧‧‧ bracket

1‧‧‧First shaft

11‧‧‧ first end

12‧‧‧ second end

2‧‧‧Inertial wheel

3‧‧‧second shaft

4‧‧‧Bubble board

5‧‧‧Blowing fan

50‧‧‧Synchronous pulley

51‧‧‧ blades

52‧‧‧Liquid

53‧‧‧ sand

6‧‧‧ pulley

7‧‧‧ linkage belt

8‧‧‧ running belt

Fig. 1 is a perspective view showing the first embodiment of the active transmission structure of the treadmill of the present invention.

Fig. 2 is a perspective perspective view showing the treadmill of the active transmission structure of the present invention.

Fig. 3 is a view showing the operation of the inertia wheel when the active transmission structure of the treadmill of the present invention is used.

Fig. 4 is a schematic view showing the operation of the blower fan when the active transmission structure of the treadmill is used.

Fig. 5 is a view showing the appearance of a second embodiment of the active transmission structure of the treadmill of the present invention.

Figure 6 is a view showing a second embodiment of the damper unit of the active transmission structure of the treadmill of the present invention.

Figure 7 is a view showing a third embodiment of the damper unit of the active transmission structure of the treadmill of the present invention.

Figure 8 is a perspective view showing a third embodiment of the active transmission structure of the treadmill of the present invention.

Fig. 9 is a view showing the appearance of a fourth embodiment of the active transmission structure of the treadmill of the present invention.

Fig. 10 is a schematic view showing the appearance of an equivalent structure derived from the fourth embodiment.

Please refer to FIG. 1 to FIG. 10, the active transmission structure 100 of the treadmill of the present invention includes a first rotating shaft 1, a inertia wheel 2, a damping unit, a second rotating shaft 3, and a buffer plate 4; The aforementioned components are all disposed on a bracket 10.

The first rotating shaft 1 has a first end 11 and a second end 12.

The inertia wheel 2 is fixed at least at either end of the first end 11 and the second end of the first rotating shaft 1, and is interlocked with the damping unit.

The damping unit is fixed at least at either end of the first end and the second end 12 of the first rotating shaft 1 and is interlocked with the first rotating shaft 1.

The damping unit may be a blower fan 5 (as shown in FIG. 1), or the damping unit is a pulley 6, a linkage belt 7, and a blower fan 5 (as shown in FIG. 5). The axis of the shaft 5 is coaxial with the movable pulley 50, and the pulley 6 is fixed to the second end 12 of the first rotating shaft 1, and the movable pulley 50 of the blower fan 5 and the pulley 6 are spaced apart from each other, and the interlocking belt 7 is wound around The pulley 6 and the movable pulley 50 are connected to each other so that the pulley 6 and the blower fan 5 are interlocked.

The aforementioned pulley 6 has a diameter equal to or smaller than the diameter of the movable pulley 50, so that the pulley 6 provides the rotational speed of the blower fan 5 at least at a lower rotational speed of the pulley 6 at any rotational speed of the running belt 8, to enhance the damping effect.

The second rotating shaft 3 is spaced apart from the first rotating shaft 1 in parallel, and the first rotating shaft 1 and the second rotating shaft 3 are wound by a running belt 8; the vertical position of the second rotating shaft 3 is lower than the vertical position of the first rotating shaft 1 .

A buffer plate 4 is disposed between the first rotating shaft 1 and the second rotating shaft 3, and is disposed in the wound running belt 8, and follows the front height and the rear of the running belt 8, and the buffering plate 4 is also set to the front height. low.

The aforementioned blower fan 5, which provides the blade 51 of the blower fan 5, is subjected to wind resistance during rotation, so that the running running belt 8 can naturally stop rotating rapidly when the runner stops running to improve the safety of the runner.

In the foregoing fan fan 5, the liquid 52 (such as FIG. 6) or the sand 53 (as shown in FIG. 7) may be filled, so that the blade 51 of the blower fan 5 is moved by the liquid 52 (as shown in FIG. 6) or the sand 53 (eg, the seventh). Figure) to enhance the damping effect.

Referring to FIG. 8 , in this embodiment, at least one end of the first end 11 and the second end 12 of the first rotating shaft 1 is provided with an inertia wheel 2 and a blower fan 5; A damper unit of a flywheel 2 and a blower fan 5 may be disposed at both the first end 11 and the second end 12.

Referring to FIGS. 9 and 10 , in this embodiment, at least one of the first end 11 and the second end 12 of the first rotating shaft 1 is provided with at least one inertia wheel 2 and one pulley 6 , and the blower fan 5 is coaxial. The movable pulley 50 and the pulley 6 are spaced apart from each other, and the linkage belt 7 is used to interlock the pulley 6 with the blower fan 5; therefore, the inertia wheel 2 and the pulley 6 are disposed at both the first end 11 and the second end 12 And the symmetry of the same movable pulley 50 and the blower fan 5, and the blower fan 5 can be disposed between the two sides of the movable pulley 50, and coaxial with the same movable pulley 50, all driven by the interlocking belt 7, not only can run The muscle strength training and rotation speed can balance the load on both sides of the treadmill 100.

With the above structure, since the vertical position of the second rotating shaft 3 is lower than the vertical position of the first rotating shaft 1, the side view of the running belt 8 is presented in a front high, low, and concave arc structure, so that the user is running. Using its own gravity and the aforementioned structure of front high and low and concave arc, The foot thrust can be automatically slid to train the muscle strength of the foot, and then the inertia wheel 2 is driven to rotate by the first rotating shaft 1. When the running speed of the runner is faster, the running speed of the running belt 8 is further pushed back by the foot. Fast to train cardiopulmonary function; when the user slows down, the resistance of the damping unit can be used to decelerate the inertia wheel 2 and when the runner stops running, the running belt 8 also stops rotating rapidly to prevent the runner from being thrown, It has a safety function, does not require the use of a motor drive, does not require the use of electricity, achieves environmental protection and safety, and is not limited by the venue where power supply is necessary.

100‧‧‧Active drive structure for treadmills

10‧‧‧ bracket

1‧‧‧First shaft

2‧‧‧Inertial wheel

3‧‧‧second shaft

4‧‧‧Bubble board

5‧‧‧Blowing fan

51‧‧‧ blades

8‧‧‧ running belt

Claims (8)

An active transmission structure of a treadmill is characterized in that a running belt is wrapped between a first rotating shaft and a second rotating shaft, and the running belt is wound on the first and second rotating shafts, and a buffer plate is arranged in the running belt. And being disposed on a bracket to form a treadmill; the system includes: a first rotating shaft having a first end and a second end; and an inertia wheel fixed to the first end and the first end of the first rotating shaft And a damper unit is disposed at least at any one of the first end and the second end of the first rotating shaft, and is coupled to the inertia wheel; wherein the damper unit is a pulley, a linkage belt, and a drum fan, the axis of the drum fan is coaxial with a movable pulley, and the pulley is fixed to the second end of the first rotating shaft, and the same moving pulley of the blower fan is spaced apart from the pulley, and the connecting belt is disposed around the pulley and the movable pulley On the top, make the pulley and the blower fan interlock. The active transmission structure of the treadmill according to claim 1, wherein the vertical position of the second rotating shaft is lower than the vertical position of the first rotating shaft. The active transmission structure of the treadmill according to claim 2, wherein the buffer plate is set to be high and low according to the front height and the rear of the running belt. The active transmission structure of the treadmill according to claim 1, wherein the first end and the second end of the first rotating shaft are respectively provided with an inertia wheel and a blower fan. The active transmission structure of the treadmill of claim 4, wherein the blower fan is filled with liquid. The active transmission structure of the treadmill of claim 4, wherein the blower fan is filled with sand. The active transmission structure of the treadmill according to claim 1, wherein the first rotating shaft The inertia wheel and the pulley are disposed on the first end and the second end, and the synchronous pulley and the blower fan are disposed at intervals. The active transmission structure of the treadmill according to claim 7, wherein the blower fan is disposed between the two side movable pulleys and coaxial with the same movable pulley.