LIFTING STRUCTURE FOR TREADMILL

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority of Chinese Patent Application No. 202420202792.X, filed on Jan. 26, 2024, the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present invention relates to the technical field of treadmills, and more particularly to a lifting structure for a treadmill.

BACKGROUND

With the development of the fitness industry and the increasing prosperity of the domestic fitness equipment market, a treadmill as an important aerobic exercise apparatus, has higher requirements in terms of functionality and user experience. The slope regulation function (i.e. the lifting function) of the treadmill is one of the key features to enhance the exercise effect and simulate outdoor terrain changes.

A lifting structure of the existing treadmill is generally complex, usually including constituent parts such as an electric lifting mechanism, a linkage transmission system and a related control system. For example, some front-mounted power treadmills adopt a lifting arm hinged with a base frame to drive the lifting structure by a motor to adjust an inclination angle of a treadmill platform; and in the design of rear-mounted power lifting, it may involve a multi-stage linkage transmission device and a complex mechanical structure to achieve the lifting action. These conventional structures are often associated with high manufacturing costs, increased maintenance difficulties and high energy consumption when diversified slope adjustments are achieved; and at the same time, due to the complexity of the structure, it may affect the overall stability and convenience of equipment.

Therefore, improvements are made in the present invention.

SUMMARY

Aiming at the shortcomings in the prior art, the present invention is intended to provide a lifting structure for a treadmill with a simple structure, easy operation, high efficiency and energy saving, to solve a series of problems caused by the complexity of the lifting mechanism for the treadmill in the current market and to improve the overall performance and user friendliness of equipment.

In order to solve the above technical problems, the present invention provides the following technical solutions.

A lifting structure for a treadmill includes:

• • a positioning unit, fixedly mounted on a treadmill frame, including a plurality of positioning holes;
  • a strut unit, rotatably arranged on the positioning unit or the treadmill frame, having a first folded state and a second unfolded state for lifting a height of a front end of the treadmill; and
  • a positioning pin, movably arranged on the strut unit for cooperating with the positioning holes to position the strut unit.

In the above solution, preferably, one end of the strut unit is rotatably connected to the positioning unit or the treadmill frame, and the other end is mounted with a support wheel.

In the above solution, preferably, a fixing shaft is fixed on a side of the treadmill frame, the positioning unit is fixedly mounted on the fixing shaft, and the strut unit is rotatably mounted on the fixing shaft.

In the above solution, preferably, the fixing shaft is fixedly mounted on the positioning unit, and the strut unit is rotatably mounted on the fixing shaft.

In the above solution, preferably, an outer end of the fixing shaft includes an internally threaded hole, and the strut unit is rotatably arranged on the fixing shaft and transversely limited by a fastener in threaded engagement with the fixing shaft.

In the above solution, preferably, an internally threaded sleeve passes through the strut unit, and the positioning pin passes through the internally threaded sleeve and is in threaded engagement with the internally threaded sleeve.

In the above solution, preferably, the positioning pin includes a threaded section in threaded engagement with the internally threaded sleeve and a rod section in engagement with the positioning hole.

In the above solution, preferably, the positioning unit is arranged with a limiting block I and a limiting block II for limiting a movable range of the strut unit, the limiting block I being arranged at an upper edge of the positioning unit, and the limiting block II being arranged at a lower edge of the positioning unit.

In the above solution, preferably, an inclination angle of the limiting block I is arranged that a lower side wall of the limiting block I is parallel to or tends to be parallel to an upper side wall of the strut unit at the minimum rotation angle, and an inclination angle of the limiting block II is arranged that an upper side wall of the limiting block II is parallel to or tends to be parallel to a lower side wall of the strut unit at the maximum rotation angle.

In the above solution, preferably, all positioning holes are arranged on a movement path of the positioning pin, and when an inner end of the positioning pin is inserted into the corresponding positioning hole, the strut unit is positioned. The present invention has the following advantageous effects.

According to the present invention, by merely cooperating the positioning pin with the positioning holes at different positions, the inclination angle of the strut unit can be adjusted to change a lifting height of the treadmill. The present invention has a simple overall structure, convenient operation and high support stability.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of the present invention mounted on a treadmill.

FIG. 2 is a schematic diagram of the present invention.

FIG. 3 is a schematic diagram of the present invention from another perspective.

FIG. 4 is a schematic diagram of the present invention in an exploded state.

DETAILED DESCRIPTION

The present invention is further described in detail with the attached drawings and specific implementations.

Referring to FIGS. 1-4, a lifting structure for a treadmill includes a positioning unit 1, a strut unit 2 and a positioning pin 3. The positioning unit 1 is fixedly mounted on a treadmill frame 4, and a plurality of positioning holes 11 are designed on the positioning unit 1 for cooperating with the positioning pin 3 to lock a position of the strut unit 2.

The strut unit 2 is designed to be rotatably arranged on the positioning unit 1 or the treadmill frame 4. In the example, one end of the strut unit 2 is rotatably mounted on the positioning unit 1, and the other end is mounted with a support wheel 21. The support wheel 21 is used for contacting the ground after the treadmill is lifted, that is, a front end of the treadmill is lifted by turning the strut unit 2 to lift the treadmill, and the strut unit 2 can be positioned by the positioning pin 3 after being turned.

In the example, the positioning unit 1 is fixedly arranged with a fixing shaft 12, and the fixing shaft 12 can pass through the positioning unit 1 and then be fixedly connected to the treadmill frame 4 to improve the overall firmness. The strut unit 2 is rotatably arranged at the fixing shaft 12. After the strut unit 2 forms a rotary connection with the fixing shaft 12, the strut unit 2 needs to be limited transversely. As an alternative, an outer end of the fixing shaft 12 includes an internally threaded hole, the fixing shaft 12 passes through the strut unit 2, and the strut unit 2 is limited transversely via a fastener 13 in threaded engagement with the fixing shaft 12.

With regard to the cooperation between the positioning pin 3 and the strut unit 2, in the example, an internally threaded sleeve 22 passes through and is fixed on the strut unit 2, and the positioning pin 3 passes through and is in threaded engagement with the internally threaded sleeve 22. Specifically, the positioning pin 3 includes a threaded section 31 in threaded engagement with the internally threaded sleeve 22 and a rod section 32 in threaded engagement with the positioning hole 11.

The positioning holes 11 are arranged on a movement path of the positioning pin 3, as shown in FIG. 3. All positioning holes 11 are arranged circumferentially at a rotation connection point of the strut unit 2. During the rotation of the positioning pin 3 with the strut unit 2, an inner end of the positioning pin 3 can pass through all the positioning holes 11 and can effectively penetrate into the positioning holes 11 when passing through so that the two can achieve a plug-in engagement. After the engagement, the strut unit 2 is effectively positioned to form a reliable support.

In order to limit a movable range of the strut unit 2, two limiting blocks are further arranged on the positioning unit 1, namely, a limiting block I 51 and a limiting block II 52. The limiting block I 51 is located at an upper edge of the positioning unit 1, and when the strut unit 2 is at the minimum rotation angle, a lower side wall of the limiting block I 51 is parallel or tends to be parallel to an upper side wall of the strut unit 2, to effectively prevent over-folding. The limiting block II 52 is located at a lower edge of the positioning unit 1, and when the strut unit 2 reaches the maximum rotation angle, an upper side wall of the limiting block II 52 is parallel or tends to be parallel to a lower side wall of the strut unit 2, playing a role of upper limit and avoiding the excessive lifting.

The strut unit 2 has a first folded state and a second unfolded state for lifting a height of a front end of the treadmill. FIG. 2 is a schematic diagram of the strut unit 2 in the first state and at the minimum rotation angle. When the strut unit 2 is positioned at the other positioning holes 11, the front end of the treadmill is lifted to different heights, which is the second state of the strut unit 2 after the front end of the treadmill is lifted.

The above examples are only used to illustrate the technical solutions of the present invention, but not to limit this. Although the present invention has been described in detail with reference to the foregoing examples, the technical solutions described in the foregoing examples can still be modified, or some technical features can be replaced by equivalents, while these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of various examples of the present invention.