Patent Description:
Now people are becoming more and more lazy, and sub-health is becoming more and more serious, which will seriously affect our health for a long time. In fitness exercises, running is a better way of exercise, and a treadmill is good fitness equipment to realize running indoors. Body builders hope that the treadmill can simulate various road conditions, so the slope adjusting function can become the standard of most treadmills. Most of existing slope adjusting functions are driven by a motor, and the shortcomings are that the motor and the matched assemblies are high in cost, resulting in the increasing overall cost of the treadmill. In addition, since the mechanical and circuit structures of the electrical lifting structure are relatively complicated, the later maintenance and repair costs are also relatively high.

<CIT> discloses a compact structure for a treadmill. The compact structure for a treadmill includes an improved mechanism for adjusting the slope of the treadmill and an improved arrangement for transmitting power to the tread belt. A snap connection is provided between the handrail and control unit support so that those two elements can be quickly disconnected and folded down when the treadmill is to be stored or moved.

An objective of the present invention is to provide a treadmill capable of adjusting slope rising and falling by a screw rod, thereby overcoming the shortcomings in the prior art.

To achieve the above objective, the present invention provides the following technical solution.

A treadmill capable of adjusting slope rising and falling by a screw rod includes a running platform, a running frame, a lifting frame, and a driving mechanism. The running frame is configured to bear the running platform. The lifting frame is arranged below the running frame and including a side arm and one end of the side arm being pivoted to the running frame. The driving mechanism includes a lead screw, the lead screw being in sleeving connection with a screw sleeve in a matching manner, and an outer side of the screw sleeve being rotatably connected to a supporting arm. The driving mechanism is arranged between the running frame and the lifting frame, the screw sleeve is driven by rotating the lead screw to move on the lead screw, and the supporting arm is driven to drive the lifting frame to adjust the slope of the treadmill. The free end of the supporting arm is rotatably connected to a rotating shaft base through a second rotating shaft, and the rotating shaft base is rotatably connected to the lifting frame or the running frame through a first rotating shaft; and the first rotating shaft and the second rotating shaft are perpendicular to each other.

In some embodiments, the running frame includes a first border and a second border; and the side arm includes a first side arm and a second side arm, one end of the first side arm being pivoted to the first border, and one end of the second side arm being pivoted to the second border.

In some embodiments, the running frame is provided with a pivoting base, and the first side arm and the second arm are jointly pivoted to the pivoting base.

In some embodiments, the lead screw includes a forward thread section and a reverse thread section, the forward thread section is in sleeving connection with a first screw sleeve, and the reverse thread section is in sleeving connection with a second screw sleeve; and the supporting arm includes a first supporting arm and a second supporting arm, the first supporting arm is pivoted to the first screw sleeve, and the second supporting arm is pivoted to the second screw sleeve.

In some embodiments, the lead screw is rotatably arranged between the first border and the second border, the free end of the first supporting arm is pivoted to the first side arm, and the free end of the second supporting arm is pivoted to the second side arm.

In some embodiments, a cross beam is arranged between the first side arm and the second side arm, the lead screw is rotatably arranged between the first border and the second border, and the free end of the first supporting arm and the free end of the second supporting arm are pivoted to the cross beam.

In some embodiments, the lead screw is rotatably arranged between the first side arm and the second side arm, the free end of the first supporting arm is pivoted to the first border, and the free end of the second supporting arm is pivoted to the second border.

In some embodiments, the lead screw includes a thread section, the thread section is in sleeving connection with a screw sleeve, and the supporting arm is pivoted to the screw sleeve.

In some embodiments, a cross beam is arranged between the first side arm and the second side arm, the lead screw is rotatably arranged between the first border and the second border, and the free end of the supporting arm is pivoted to the cross beam.

In some embodiments, a cross frame is arranged between the first border and the second border, the lead screw is rotatably arranged between the first side arm and the second side arm, and the free end of the supporting arm is pivoted to the cross frame.

In some embodiments, a crank is arranged at a first end of the lead screw.

In some embodiments, a moving wheel is arranged at an end part of the side arm.

In some embodiments, several bottom feet are arranged at the bottom of the running frame.

Compared with the prior art, the present application has the following advantages: the lifting structure of the present application adopts a manually driven mechanical structure and is simple in structure and low in cost, and the later maintenance and repair costs are lower than those of an electric lifting structure; secondly, the selling price can be reduced on the premise of reducing the manufacturing cost; and the driving mechanism in the present application drives the treadmill in a cooperative manner of the lead screw and the screw sleeve to adjust the slope, and the cooperation between the lead screw and the screw sleeve in the present application has a self-locking ability, so that the treadmill is safer during use.

The accompany drawings constituting a part of this application provide further understanding of the present invention. The schematic embodiments of the present invention and description thereof are intended to be illustrative of the present invention and do not constitute an undue limitation of the present invention.

Description of reference numerals: <NUM>-running platform; <NUM>-running belt; <NUM>-roller; <NUM>-running motor; <NUM>-running frame; <NUM>-first border; <NUM>-second border; <NUM>-cross frame; <NUM>-bottom foot; <NUM>-lifting frame; <NUM>-first side arm; <NUM>-second side arm; <NUM>-cross beam; <NUM>-moving wheel; <NUM>-driving mechanism; <NUM>-lead screw; <NUM>-forward thread section; <NUM>-reverse thread section; <NUM>-thread section; <NUM>-screw sleeve; <NUM>-first screw sleeve; <NUM>-second screw sleeve; <NUM>-supporting arm; <NUM>-first supporting arm; <NUM>-second supporting arm; <NUM>-crank; <NUM>-rotating shaft base.

The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Various examples are provided <NUM> by way of interpretation of the present invention and are not intended to limit the present invention. Indeed, it will be apparent to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope of the present invention. For example, features shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present invention includes such modifications and variations falling within the scope of the appended claims.

In the description of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like denote orientation or positional relationships based on those shown in the drawings and are intended for ease of description only and not to require that the present invention is necessarily constructed and operated in a particular orientation and therefore cannot be construed as limiting to the present invention. The terms "connection", "connect" and "set" used in the present invention should be understood in a broad sense, for example, which may refer to a fixed connection or a detachable connection; which may refer to a direct connection or an indirect connection through intermediate components; which may refer to a wired electrical connection, a radio connection, or a wireless communication signal connection, and the specific meanings of the above terms may be understood by those of ordinary skill in the art according to a specific situation.

One or more examples of the present invention are shown in the accompanying drawings. The detailed description uses numeric and letter marks to refer to features in the drawings. Similar or like reference signs in the drawings and descriptions have been used to refer to similar or like parts of the present invention. As used herein, the terms "first", "second" and "third" and the like are used interchangeably to distinguish one member from another and are not intended to denote the location or importance of individual members.

As shown in <FIG> and <FIG>, according to an embodiment of the present invention, a treadmill capable of adjusting slope rising and falling by a screw rod is provided and includes a running platform <NUM> and a running frame <NUM>. The running platform <NUM> is provided with a running belt <NUM>, rollers <NUM> arranged at two ends of the running belt <NUM>, and at least one running motor <NUM> for providing a driving force to at least one roller <NUM>. The running frame <NUM> is a carrier of the running platform <NUM> and supports the running platform <NUM>. The running frame <NUM> is arranged on a side surface of the running platform <NUM>. A lifting frame <NUM> is arranged below the running frame <NUM>. According to the present application, the slope of the treadmill is adjusted by the lifting frame <NUM>. In this embodiment, the lifting frame <NUM> includes a side wall, and one end of the side arm is pivoted to the running frame <NUM>. A driving mechanism <NUM> of the lifting frame <NUM> includes a lead screw <NUM>, a screw sleeve <NUM> with teeth is mounted on the lead screw <NUM> in a matching manner, and the screw sleeve <NUM> can reciprocate on the lead screw <NUM> through the rotation of the lead screw <NUM>. The driving mechanism <NUM> is connected to the lifting frame <NUM> through the supporting arm <NUM>, and the lifting frame <NUM> is driven by the supporting arm <NUM> to move up and down so as to adjust the slope of the treadmill.

Specifically, in Embodiment <NUM>, in this embodiment, the running frame <NUM> includes a first border <NUM> and a second border <NUM>; the first border <NUM> and the second border <NUM> are arranged on two sides of the running platform <NUM>, respectively; and the first border <NUM> and the second border <NUM> are arranged in parallel. The side wall of the lifting frame <NUM> is provided with a first side arm <NUM> and a second side arm <NUM>, respectively; one end of the first side arm <NUM> is pivoted to the first border <NUM>; and one end of the second side arm <NUM> is pivoted to the second border <NUM>. The lead screw <NUM> is a bidirectional lead screw <NUM>; the lead screw <NUM> is rotatably arranged between the first border <NUM> and the second border <NUM>, and includes a forward thread section <NUM> and a reverse thread section <NUM>; and the forward thread section <NUM> is in sleeving connection with a first screw sleeve <NUM>, and the reverse thread section <NUM> is in sleeving connection with a second screw sleeve <NUM>. The first screw sleeve <NUM> is connected to the first side arm <NUM> through the first supporting arm <NUM>, and the second screw sleeve <NUM> is connected to the second side arm <NUM> through the second supporting arm. A crank <NUM> is arranged at one end, close to the first border <NUM>, of the lead screw <NUM>, the lead screw <NUM> is rotated by shaking the crank <NUM>, and the first screw sleeve <NUM> and the second screw sleeve <NUM> are driven to reciprocate on the lead screw <NUM>, so that the first side arm <NUM> and the second side arm <NUM> are driven by the first supporting arm <NUM> and the second supporting arm <NUM> to adjust the slope of the treadmill. To prevent a force interference between the first supporting arm <NUM> or the second supporting arm <NUM> and the first side arm <NUM> or the second side arm <NUM> during movement, the first supporting arm <NUM> and the second supporting arm <NUM> are connected to the first side arm <NUM> and the second side arm <NUM> respectively through the rotating shaft base <NUM>. The rotating shaft base <NUM> is rotatably connected to the side arm through the first rotating shaft, and is rotatably connected to the supporting arm <NUM> through the second rotating shaft. The first rotating shaft and the second rotating shaft are perpendicular to each other.

Embodiment <NUM>, based on Embodiment <NUM>, is different from Embodiment <NUM> in that a cross beam <NUM> is arranged between the first side arm <NUM> and the second side arm <NUM>, and the cross beam <NUM> and the lead screw <NUM> are parallel to each other. One ends, away from the lead screw <NUM>, of the first supporting arm <NUM> and the second supporting arm <NUM> are rotatably connected to the cross beam <NUM>, and of course, may be connected to the cross beam <NUM> through the rotating shaft base <NUM>.

Embodiment <NUM>, as shown in <FIG>, based on Embodiment <NUM> and Embodiment <NUM>, is different from the above embodiment in that only one supporting arm <NUM> is provided, the lead screw <NUM> is provided with a thread section <NUM> in only one direction, and the lead screw <NUM> is in sleeving connection with only one screw sleeve <NUM>. Preferably, one end of the supporting arm <NUM> is rotatably mounted in the middle of the cross beam <NUM> in Embodiment <NUM>. Similarly, the thread section <NUM> of the lead screw <NUM> is arranged in a middle area of the first border <NUM> and the second border <NUM>.

Embodiment <NUM>, not shown in the figure, based on the above embodiments, is different from the above embodiments in that the first side arm <NUM> and the second side arm <NUM> share a pivoting end with the running frame <NUM>. Specifically, a cross frame <NUM> is arranged between the first border <NUM> and the second border <NUM>, the cross frame is provided with a pivoting base, and the first side arm <NUM> and the second side arm <NUM> are jointly pivoted to the pivoting base. Of course, the first side arm <NUM> and the second side arm <NUM> may be combined into one single arm. Further, the cross beam <NUM> may be arranged at the tail end of the single arm, and the driving mechanism <NUM> is the same as the above embodiments.

In the above embodiments, a connection relationship between the driving mechanism <NUM> and the running frame <NUM> and a connection relationship between the driving mechanism and the lifting frame <NUM> may be changed adaptively.

For example, taking Embodiment <NUM> as an example, the lead screw <NUM> is rotatably arranged between the first side arm <NUM> and the second side arm <NUM>, the free end of the first supporting arm <NUM> is rotatably connected to the first border <NUM>, and the free end of the second supporting arm <NUM> is rotatably connected to the second border <NUM>.

For another example, taking Embodiment <NUM> as an example, the lead screw <NUM> is rotatably arranged between the first side warm <NUM> and the second side arm <NUM>; and correspondingly, a cross frame <NUM> is arranged between the first border <NUM> and the second border <NUM>. In Embodiment <NUM>, the cross beam <NUM> is provided. Here, the cross beam <NUM> can reduce a twisting force generated by the first side arm <NUM> and the second side arm <NUM> on the lead screw <NUM>. The free end of the first supporting arm <NUM> and the free end of the second supporting arm <NUM> are rotatably connected to the cross frame <NUM>.

In some embodiments, a moving wheel <NUM> is arranged at the end part of the side arm in the above embodiments, thereby facilitating the movement of the treadmill.

In some embodiments, several bottom feet <NUM> are arranged at the bottom of the running frame <NUM> in the above embodiments.

Claim 1:
A treadmill capable of adjusting slope rising and falling by a screw rod, comprising a running platform (<NUM>), and further comprising:
a running frame (<NUM>), configured to bear the running platform (<NUM>);
a lifting frame (<NUM>), arranged below the running frame (<NUM>) and comprising a side arm, one end of the side arm being pivoted to the running frame (<NUM>);
a driving mechanism (<NUM>), comprising a lead screw (<NUM>), the lead screw (<NUM>) being in sleeving connection with a screw sleeve (<NUM>) in a matching manner, and an outer side of the screw sleeve (<NUM>) being rotatably connected to a supporting arm (<NUM>),
the driving mechanism (<NUM>) is arranged between the running frame (<NUM>) and the lifting frame (<NUM>), the screw sleeve (<NUM>) is driven by rotating the lead screw (<NUM>) to move on the lead screw (<NUM>), and the supporting arm (<NUM>) is driven to drive the lifting frame (<NUM>) to adjust the slope of the treadmill;
characterized in that the free end of the supporting arm (<NUM>) is rotatably connected to a rotating shaft base (<NUM>) through a second rotating shaft, and the rotating shaft base (<NUM>) is rotatably connected to the lifting frame (<NUM>) or the running frame (<NUM>) through a first rotating shaft; and
the first rotating shaft and the second rotating shaft are perpendicular to each other.