KR20230089993A - Step fitness equipment with drop prevention and stable operation - Google Patents

Abstract

The present invention relates to a stair movement mechanism capable of preventing falling and stably driving, a frame including support side walls spaced apart from each other in the left and right directions, and a pair of sprockets rotatably coupled to upper and lower ends of the support side wall. And, a power transmission member coupled to the pair of sprockets and rotating in an endless orbit, one side coupled to one side of the power transmission member, and a plurality of steps that move downward when the power transmission member rotates, the A power unit connected to a rotational shaft of any one of a pair of sprockets and providing rotational force to the sprocket at a preset speed; Formed or coupled to one side of the rotational axis of the motor, connected to a worm having a certain lead angle and the rotational axis of any one of the pair of sprockets, characterized in that it comprises a worm wheel whose outer surface is gearedly coupled to the worm Provides a stair exercise device capable of preventing fall and stably driving.
According to the present invention as described above, the worm formed on the rotating shaft of the motor and the worm wheel coupled to the sprocket are combined, but the friction angle of the worm is formed larger than the lead angle to prevent force from being transmitted from the worm to the motor due to the user's load When the user steps on the step or wants to stop the movement, the position of the step can be stably fixed, and the manufacturing cost increase can be minimized by being formed in a simple structure.

Description

Step fitness equipment with drop prevention and stable operation}

The present invention relates to a stair exercise device capable of preventing falls and being stably driven, and more particularly, it is composed of a simple structure as well as preventing safety accidents such as a user falling due to a sudden descent of a step by a user's load. It relates to a stair movement mechanism capable of preventing falling and stably driving, which can minimize an increase in manufacturing cost.

Recently, interest in leisure life and interest in health have increased significantly, and various outdoor activities such as sports and mountain climbing have been performed. People who enjoy exercising in a place equipped with exercise equipment such as, and those who do not have enough space usually buy exercise equipment for various exercise purposes and exercise at home.

As interest in indoor exercise has also increased, recently, indoor exercise equipment capable of assisting not only strength training but also aerobic exercise mainly performed outdoors has been developed and sold.

As an example of indoor exercise equipment that can assist aerobic exercise, a treadmill that assists running or walking exercise and a stair exercise machine that can similarly perform stair exercise have been developed and sold. It is widely used as a strength exercise equipment in facilities such as health clubs because it can perform strength exercise together with aerobic exercise. Stair exercise equipment is an inclined exercise machine unlike a treadmill, which is a flat exercise machine, so a braking device is required for user safety. do. Illustratively, US Patent No. 8702571 discloses a braking device disposed next to a flywheel. It is disclosed that the braking device is controlled by a control signal transmitted by the controller. Here, it is disclosed that the braking device can be adjusted so that the amount of braking force is increased or decreased by a controller. As a result, the flywheel rotates, and the braking device provides an opposing torque to the flywheel to slow the flywheel's rotational speed and step speed.

The braking device of the conventional stair treadmill is generally operated by electronic control, and the resistance of the braking device is controlled by the controller. There is a problem that causes a failure or a safety hazard situation to the user.

As a technique for solving this problem, US Patent Registration No. 10596409 as shown in FIG. 1 has been proposed.

The stair movement mechanism 100 of the US registered patent is composed of a frame 110, a pulley 121, and a chain 122 disposed obliquely on the frame 110, and a driving unit in which the chain 122 rotates in an endless orbit ( 120) and a step 130 in which one side of the chain 122 is coupled with a predetermined step and moves downward when the chain 122 rotates.

The brake unit 140 is rotatably installed on one side of the frame 110 and the flywheel 141 connected to the pulley 121 and the center area is rotatable on one side of the frame 110 to stop the rotation of the flywheel 141. A brake unit 142 having a brake block 142a coupled together, a first electromagnet 143 on the flywheel 141 side, a second electromagnet 144 on the brake unit side, and a frame 110 and a brake block 142a ) It is composed of a spring 145 interposed between the upper ends and providing elastic force to the upper end of the brake block 142a in the direction of the flywheel 141.

Therefore, in the conventional stair exercise device 100, when the second electromagnet 144 is energized during exercise, the second electromagnet 144 moves along the pulley 121 due to the attractive force between the first electromagnet 143 and the second electromagnet 144. direction, and presses the lower end of the brake block 142a in the direction of the flywheel 141 so that the flywheel 141 rotates freely, and when the user steps on the step 130 or stops the movement, the second electromagnet (144) is turned off. Accordingly, the upper end of the brake block 142a is pressed by the spring 145 to temporarily fix the position of the step 130 by regulating the rotation of the pulley 121 connected thereto while in contact with the flywheel 141.

However, the braking structure of the conventional stair movement mechanism 100 requires many parts such as a flywheel 141, a spring 145, a pair of electromagnets 143 and 144, and a brake block 142a, and the braking method is complicated, resulting in high manufacturing cost. There is a problem that greatly increases and the device becomes large.

Unlike the above-described technologies, a technology in which a step rotates along an endless track in a form similar to a conventional treadmill using electric rotational force by a motor connected to a rotation shaft of a pulley is proposed in Korean Patent Registration No. 2141008. However, even in the electric rotary type, a braking device is required, and accordingly, a technology for preventing human accidents due to power failure is required.

Accordingly, Korean Patent Registration No. 2141008 includes three braking means (first to third braking units), and the electromagnet controls the three braking means according to power supply and loss, so that appropriate braking control is performed in normal and power failure conditions. making it happen

As such, in the conventional stair movement mechanism, a braking device having a complicated structure is required regardless of a manual rotation method and an automatic rotation method by a motor, which is a factor in increasing cost and increasing the size of the device.

1. US Patent No. 8702571 "Stair exerciser apparatus" 2. US Patent No. 10596409 "Stair exerciser apparatus" 3. Korean Patent No. 2141008 "Stair Treadmill"

The present invention has been made to solve the above problems, and an object of the present invention is to significantly improve safety by stably fixing the position of a step when a user steps on a step or stops an exercise while taking a simple structure. It is to provide a stair movement mechanism capable of preventing falling and stably driving.

According to one aspect of the present invention for achieving the above object, a frame formed to have a certain inclination angle, a first rotational shaft installed at the upper end of the frame and a second rotational shaft installed at the lower end of the frame are coupled to an infinite orbit A rotating power transmission member, one side coupled to one side of the power transmission member, a plurality of steps that are moved together when the power transmission member rotates, and are connected to the first or second rotational shaft to provide rotational force to the rotational shaft It includes a power unit and a controller for controlling driving of the power unit, wherein the power unit provides power and has a motor having a power shaft, formed on an outer surface of the power shaft of the motor or coupled to one side of the power shaft of the motor, and a constant lead It provides a stair movement mechanism capable of preventing falling and driving stably, characterized in that it comprises a worm having an angle and a worm wheel connected to the first or second rotation shaft and having one side of an outer surface geared to the worm.

Also, it is preferable that the friction angle of the worm is larger than the lead angle.

In addition, the motor may be directly connected to the first or second rotation shaft.

In addition, the controller preferably applies counter-electromotive force to the motor when torque applied from the worm toward the motor is detected.

According to the present invention as described above, the worm formed on the rotating shaft of the motor and the worm wheel coupled to the sprocket are combined, but the friction angle of the worm is formed larger than the lead angle to prevent force from being transmitted from the worm to the motor due to the user's load When the user steps on the step or wants to stop the movement, the position of the step can be stably fixed, and the manufacturing cost increase can be minimized by being formed in a simple structure.

In addition, in the present invention, when an additional force is applied to the step in addition to the user's load and the power is transmitted from the worm wheel to the worm to rotate the power shaft of the motor, the controller applies counter-electromotive force to the motor to more stably fix the position of the step. There are possible effects.

1 is a view showing a conventional stair movement mechanism
Figure 2 is a perspective view of a stair movement mechanism capable of preventing falling and stably driving according to an embodiment of the present invention;
3 is a side view of a stair movement mechanism capable of preventing falling and stably driving according to an embodiment of the present invention;
Figure 4 is a perspective view showing a power shaft of a motor in which a worm wheel and a worm are formed according to an embodiment of the present invention;
5 is a view showing a state in which a user steps on a step according to an embodiment of the present invention;
6 is a view showing a state in which a user's load is prevented from being transferred from a worm wheel to a worm according to an embodiment of the present invention;
7 is a view showing a stair movement mechanism capable of preventing falling and being stably driven according to another embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view of a stair movement mechanism capable of preventing falling and stably driving according to an embodiment of the present invention, Figure 3 is a side view of a stair movement mechanism capable of preventing falling and stably driving according to an embodiment of the present invention, 4 is a perspective view showing a power shaft of a motor in which a worm wheel and a worm are formed according to an embodiment of the present invention.

As shown in FIGS. 2 to 4, the stair movement mechanism 1 capable of preventing falling and stably driving according to an embodiment of the present invention includes a frame 10, a pair of sprockets 20, and a power transmission member ( 30), a plurality of steps 40, a power unit 50, and a controller 60.

The frame 10 may include a pair of side walls 11 disposed at a predetermined interval in the left and right directions, and a plurality of connecting rods 12 having both ends coupled to inner surfaces of the pair of side walls 11, respectively. there is.

The frame 10 is disposed in the area to be installed, and serves to support the installation area as well as to provide an installation area for each configuration to be described later.

The sprocket 20 is for providing rotational force to the step 40 through the power transmission member 30, and each pair has a first rotational shaft 21 and a second rotational shaft 22, and the upper end of the frame 10 And are rotatably coupled to the lower end, respectively.

The power transmission member 30 is coupled to the outer circumference of the sprocket 20 disposed on the upper and lower sides and rotates together in an infinite orbit when the sprocket 20 rotates to transmit rotational force to the step 40 to be described later, and a general chain can be used

Here, the sprocket 20 and the power transmission member 30 are each installed at a position corresponding to the inner surface of the pair of side walls 11, and are disposed inclined upward toward the rear in a vertical direction between a plurality of steps 40 to be described later. It is installed so that a step difference is formed.

On the other hand, it is obvious that the chain, which is the sprocket 20 and the power transmission member 30, is known enough to purchase and use commercially supplied ones to those skilled in the art, and detailed configuration description should be omitted.

Step 40 is a platform 41 in which a support surface for supporting the user's feet is formed and both rear end portions are rotatably coupled to one side of the chain, and one end portion is rotatably coupled to one side of the front end of the platform 41 and the other The end portion is configured to include a riser 42 rotatably coupled to the other side of the power transmission member 30. (Nos. 41 and 42 in the drawing)

These steps 40 provide a support area where the user's feet are supported, and when the power transmission member 30 rotates, it serves to provide an experience similar to climbing stairs to the user while moving downward.

The power unit 50 includes a motor 51 having a power shaft 51a, a worm 52 formed to have a predetermined lead angle on the outer surface of the power shaft 51a, and a central region of the first rotational axis of the sprocket 20 ( 21) and includes a worm wheel 53 having one side of the outer surface geared to the worm 52 and serves to provide rotational force to the sprocket 20.

A general step motor 51 may be used as the motor 51, and a power shaft 51a for transmitting power to the outside is formed on one side.

The worm 52 is formed to have a certain lead angle on the outer surface of the power shaft 51a of the motor 51, and when the motor 51 is driven by gear coupling with the worm wheel 53 described later, the sprocket through the worm wheel 53 ( 20) to provide rotational force.

Meanwhile, in this embodiment, the worm 52 is described as being formed on the outer surface of the power shaft 51a of the motor, but the present invention is not necessarily limited thereto, and the worm 52 is formed to have a separate body and the motor It may be configured to be coupled to the power shaft (51a) of.

The worm wheel 53 is formed in a substantially wheel shape, its center is connected to the sprocket 20, and a gear having a shape corresponding to the worm 52 is formed on one side of the outer surface to be geared to the worm 51aa, and the motor The driving force of (51) is transmitted to the sprocket (20).

Meanwhile, in this embodiment, the friction angle of the worm 52 is greater than the lead angle to prevent power from being transmitted to the motor 51 through the power shaft 51a. In other words, when the user's load is applied to the step 40 and the load is transmitted to the motor 51 through the sprocket 20, the worm wheel 53 and the worm 52, the worm wheel 53 and the worm 52 ), it is possible to prevent the user from falling due to the rapid descent of the step 40 by preventing the rotation of the motor 51 in advance, the principle of which will be described in detail in the following operation description.

In addition, the power unit 50 according to the present embodiment is preferably directly connected to the sprocket 20. When the power unit 50 and the sprocket 20 are connected by the power transmission member 30, the fixed step ( This is to prevent the occurrence of shaking in 40) so that the user can more stably step on or come down from the step 40.

The controller 60 is electrically connected to the power unit 50 and serves to control driving of the power unit 50 .

Figure 5 is a view showing a state in which a user climbs on a step according to an embodiment of the present invention, Figure 6 is a state in which the user's load is prevented from being transferred from the worm wheel to the worm according to an embodiment of the present invention It is an illustrated drawing.

The operation of the stair movement mechanism 1 capable of preventing falling and stably driving according to an embodiment of the present invention having such a configuration will be described with reference to FIGS. 5 and 6 attached thereto.

As shown in FIG. 5, in a state in which the driving of the motor 51 is stopped, the user steps on the step 40 and climbs onto the step 40.

Next, when the motor 51 rotates at a predetermined speed, the driving force of the motor 51 is transmitted to the worm wheel 53 through the power shaft 51a of the motor 51, that is, the worm 52, and the force is again It is transmitted to the sprocket 20 and the chain, which is the power transmission member 30, through the worm wheel 53, and the chain rotates in an endless track.

In addition, the plurality of steps 40 coupled to the chain move downward according to the rotational motion of the chain, and the user performs a climbing exercise while stepping on the downwardly moving steps 40 in order.

Thereafter, when the exercise is to be ended, driving of the motor 51 is stopped and the user descends from the step 40 .

On the other hand, in the existing stair exercise equipment, when the user stands on the step 40 while the motor 51 is stopped, that is, when the user steps on the step 40 to start the exercise or to end the exercise, the motor In the state in which (51) is stopped, the user's load is transmitted to the power shaft 51a of the motor 51 through the power transmission member 30, the sprocket 20, the worm wheel 53 and the worm 52 and transmitted As the power shaft 51a of the motor 51 is rotated by force and the step 40 rapidly descends, a user positioned on the step 40 may fall from the step 40 and be injured.

At this time, looking at the case of rotating the power shaft 51a on which the worm 51aa is formed through the worm wheel 53, the rotational force F ₁ is given to the worm 51aa so that the rotational force F ₂ is generated in the worm wheel 53 , the rotational torque T of the power shaft 51a on which the worm 51aa is formed is as follows.

[Equation 1]

(Dw = diameter of pitch circle of worm, β = friction angle of worm, ρ = lead angle of worm)

Therefore, the efficiency η of the worm is

[Equation 2]

Substituting this into T again,

[Equation 3]

It can be seen that this

And, when trying to drive the worm wheel 53 to rotate the power shaft 51a of the motor 51 on which the worm 51aa is formed, the energy given to the worm wheel 53 is F ₂ l, and the motor on which the worm 51aa is formed The work that the power shaft 51a of (51) rotates is 2πT'. At this time, since the power shaft 51a rotates in the opposite direction, the direction of the frictional force is reversed, and the efficiency η of the motor power shaft 51a rotating in the opposite direction is as follows.

[Equation 4]

(η = Efficiency of the motor power shaft, T = Torque of the motor power shaft, F ₂ = Energy given to the worm wheel, β = Friction angle of the worm, ρ = Lead angle of the worm)

Referring to the above equation, in order to rotate the power shaft 51a on which the worm 52 is formed using the worm wheel 53 as a driving shaft, the efficiency must be positive, and if η'>0, β>ρ'.

However, in the stair movement device 1 capable of preventing falling and stably driving according to the present embodiment, the friction angle of the worm 52 is larger than the lead angle (ρ'≥β), so when the worm wheel 53 is used as a driving shaft As shown in FIG. 8, the power shaft 51a does not rotate.

Therefore, in the stair exercise device 1 capable of preventing falling and driving stably according to the present embodiment, the user steps on the step 40 or descends from the step 40 in a state in which the driving of the motor 51 is stopped. When sleeping, the power shaft 51a of the motor 51 is not rotated by the user's load and the step 40 can firmly support the user at the corresponding position, so the user can stably climb on the step 40 or step It has features that can be descended from (40).

7 is a view showing a stair movement device capable of preventing falling and being stably driven according to another embodiment of the present invention.

The basic configuration of the embodiment of FIG. 7 is the same as that of the embodiments of FIGS. 2 to 6, but the user's load is applied from the worm 52 to the motor 51 to more reliably prevent the power shaft 51a from rotating It is formed in a structure that has

In the previous embodiment, when the user's load is applied to the step 40 and transmitted to the worm wheel 53 through the sprocket 20, the efficiency of the worm 52 is formed to be 0 or less, so that the user's load is transferred from the worm wheel 53 It consists of a structure that prevents transmission to the worm 52, but changes occur in the set efficiency due to the user's movement or the inertia of the power transmission member 30, and the user's load from the worm wheel 53 to the worm 52 This transmission may occur when the power shaft 51a rotates.

Accordingly, in this embodiment, as shown in FIG. 7, when the controller 60 for controlling the driving of the motor 51 detects the torque applied from the worm 52 in the direction of the motor 51, the preset magnitude or the detected torque A counter electromotive force corresponding to the torque is applied to the motor 51 .

Therefore, in the motor 51, a reverse rotational force opposing the torque applied to the motor 51 is generated to resist the torque transmitted from the worm 52, even if the user's load from the worm 51 to the motor 51 is partially Even if applied, rotation of the power shaft 51a can be stably prevented.

Since other structures are the same as those of the above-described basic embodiment, the rest of the description will be omitted.

Although the present invention has been described with respect to the preferred embodiments mentioned above, various modifications and variations are possible without departing from the spirit and scope of the invention. Accordingly, the scope of the appended claims will include such modifications and variations as fall within the scope of this invention.

10: frame 11: side wall
12: connecting rod 20: sprocket
30: power transmission member 40: step
41: platform 42: riser
50: power unit 51: motor
51a: power shaft 51aa: worm
53: worm wheel 60: controller

Claims (4)

a frame formed to have a predetermined inclination angle;
a power transmission member coupled to a first rotational shaft installed at an upper end of the frame and a second rotational shaft installed at a lower end of the frame to rotate in an endless orbit;
a plurality of steps, one side of which is coupled to one side of the power transmission member and moves together when the power transmission member rotates;
a power unit connected to the first or second rotational shaft to provide rotational force to the rotational shaft; and
And a controller for controlling the driving of the power unit,
the power unit
a motor providing power and having a power shaft;
A worm formed on an outer surface of the power shaft of the motor or coupled to one side of the power shaft of the motor and having a predetermined lead angle; and
A stair movement mechanism capable of preventing falling and stably driving, characterized in that it comprises a worm wheel connected to the first or second rotation shaft and having one side of the outer surface geared to the worm.
According to claim 1,
A stair movement mechanism capable of preventing falling and stably driving, characterized in that the friction angle of the worm is formed larger than the lead angle.
According to claim 1,
The motor is a stair movement mechanism capable of preventing falling and stably driving, characterized in that directly connected to the first or second rotation shaft.
According to claim 1,
Wherein the controller applies counter-electromotive force to the motor when torque applied from the worm toward the motor is detected.

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