Structure for reducing idle stroke of cam of leg trainer

Abstract

The utility model discloses a cam idle stroke reducing structure of a leg training device, the structure is applied to the leg training device, the structure comprises a limiting mechanism, a kicking mechanism and a cam aluminum disc, the limiting mechanism is arranged on the leg training device and is provided with a rotating part, the kicking mechanism is provided with a kicking arm and a positioning pin, and the cam aluminum disc is arranged on the rotating part. The kicking arm and the cam aluminum disc are coaxially and rotationally installed on the rotating part, the positioning pin is arranged on the kicking arm, the angle of the kicking arm is positioned through insertion of the positioning pin and the cam aluminum disc, and the stroke of the kicking arm is adjusted. The structural design that the idle stroke of the cam can be effectively reduced is achieved, so that the strength transmission efficiency and the exercise effect of a user are improved.

Description

A structure for reducing cam idle travel in a leg trainer Technical Field

[0001] This utility model relates to the field of fitness equipment technology, and in particular to a structure for reducing the idle travel of a cam in a leg trainer. Background Technology

[0002] The integrated leg extension and retraction function is a common feature in portable home fitness equipment, utilizing a cam mechanism to transmit force and convert motion. However, existing cam mechanisms suffer from a free travel problem, where the input motion in the movement system is not effectively transmitted to the output end, resulting in ineffective displacement. The core characteristic of free travel is the interruption of energy transfer or lack of resistance, leading to reduced user efficiency. Currently, there is a lack of convenient and effective solutions to reduce this free travel, thus limiting the performance of fitness equipment and the user experience. Therefore, there is an urgent need for a structural design that can effectively reduce cam free travel to improve force transmission efficiency and user training effectiveness. Summary of the Invention

[0003] The purpose of this invention is to provide a structure for a leg trainer that reduces the idle travel of the cam.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A structure for reducing the idle stroke of a cam in a leg trainer is disclosed. This structure, applied to a leg trainer, includes a limiting mechanism, a kicking mechanism, and a cam aluminum disc. The limiting mechanism is mounted on the leg trainer and has a rotating part. The kicking mechanism has a kicking arm and a positioning pin. The kicking arm and the cam aluminum disc are coaxially rotatably mounted on the rotating part. The positioning pin is located on the kicking arm and its angle is positioned by engaging with the cam aluminum disc, thereby adjusting the stroke size.

[0006] Furthermore, the limiting mechanism is provided with a limiting arm and a pulley assembly. One end of the limiting arm is connected to the leg trainer, and the other end has a rotating hole and an internal rotating shaft to form a rotating part. The cam aluminum disc and the kick arm have openings that align with the rotating hole and are rotatably mounted on the same rotating shaft. The pulley assembly is rotatably disposed inside the limiting arm through the pulley shaft and has a steel wire rope inside that connects the cam aluminum disc and the counterweight of the leg trainer.

[0007] Furthermore, the bottom of the cam aluminum disk is provided with a mounting part for installing a steel wire rope, and its side wall is provided with multiple positioning holes for engaging with positioning pins for positioning.

[0008] Furthermore, the bottom of the limiting arm is provided with a limiting member, and the kick arm is provided with a stop that cooperates with the limiting member. When the kick arm approaches the limiting arm, the stop abuts against the limiting member to prevent the kick arm from colliding with the limiting arm.

[0009] Furthermore, the kick arm is provided with a pin seat and an adjusting handle. The positioning pin is movably mounted on the pin seat, and the adjusting handle is connected to the positioning pin. The positioning pin is moved by pulling the adjusting handle to control its movement in and out of the positioning hole.

[0010] Furthermore, the pin seat is provided with an elastic element installed on the positioning pin. The elastic element is sleeved on the positioning pin and pushes it to engage with the positioning hole.

[0011] Furthermore, the kick arm consists of two symmetrically arranged plates connected by a connecting block.

[0012] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0013] 1. The kicking mechanism and limiting mechanism of this utility model, by engaging the cam aluminum disc with the positioning pin, thereby positioning its angle and limiting it to a specified position, can effectively reduce the idle stroke generated during the kicking movement during training, improve the efficiency of force transmission, reduce ineffective displacement, and improve training effect and user experience.

[0014] 2. The limiting mechanism of this utility model is equipped with a limiting component, and the kick arm is equipped with a stop component that cooperates with it. The two work together, resulting in a simple structure and high reliability. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 is a schematic diagram of this utility model from another angle;

[0017] Figure 3 is an exploded structural diagram of this utility model.

[0018] Explanation of reference numerals in the attached figures:

[0019] Limiting mechanism 1; kicking mechanism 2; cam aluminum disc 3; rotating part 11; limiting arm 12; pulley block 13; kicking arm 21; positioning pin 22; limiting component 23; stop component 24; pin seat 25; adjusting handle 26; mounting part 31; positioning hole 32. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] It should be noted that in this utility model, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element of this utility model must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Example

[0023] As shown in Figures 1 to 3, this utility model discloses a structure for reducing the idle stroke of a leg trainer. This structure, applied to a leg trainer, includes a limiting mechanism 1, a kicking mechanism 2, and a cam aluminum disk 3. The limiting mechanism 1 is mounted on the leg trainer and has a rotating part 11. The kicking mechanism 2 has a kicking arm 21 and a positioning pin 22. The kicking arm 21 and the cam aluminum disk 3 are coaxially rotatably mounted on the rotating part 11. The positioning pin 22 is mounted on the kicking arm 21. The cam aluminum disk 3 is positioned by the positioning pin 22 engaging with it to fix its angle and adjust its stroke.

[0024] The connection and installation method between the limiting mechanism 1 and the leg trainer in this embodiment is the prior art. This embodiment does not limit it and it can be fixed by screws.

[0025] The kicking mechanism 2 and the limiting mechanism 1 engage the cam aluminum disc 3 through the positioning pin 22 to position its angle and limit it to a specified position. This can effectively reduce the idle stroke generated during the kicking movement during training, improve the efficiency of force transmission, reduce ineffective displacement, and improve training effect and user experience.

[0026] The limiting mechanism 1 is provided with a limiting arm 12 and a pulley assembly 13. One end of the limiting arm 12 is connected to the leg trainer, and the other end has a rotating hole and a rotating shaft to form a rotating part 11. The cam aluminum disk 3 and the kick arm 212 have openings that align with the rotating hole and are rotatably mounted on the same rotating shaft. The pulley assembly 13 is rotatably mounted inside the limiting arm 12 through the pulley shaft and has a steel wire rope inside that connects the cam aluminum disk 3 and the counterweight of the leg trainer. The steel wire rope is existing technology and is not limited in this embodiment.

[0027] The limiting arm 12 is preferably composed of two symmetrical plates and is connected and fixed by a connecting block.

[0028] The bottom of the cam aluminum disc 3 is provided with a mounting part 31 for mounting the wire rope, and its side wall is provided with multiple positioning holes 32 for engaging and positioning with positioning pins 22. The connection and fixing method between the mounting part 31 and the wire rope is existing technology, which can be snap-fit, locking or clamping by locking components, and this embodiment is not limited.

[0029] The bottom of the limiting arm 21 is provided with a limiting member 23, and the kick arm 21 is provided with a stop 24 that cooperates with the limiting member 23. The stop 24 can be a block, a tube, or a gasket. When the kick arm 21 approaches the limiting arm 12, the stop 24 abuts against the limiting member 23, preventing the kick arm 21 from colliding with the limiting arm 12. The limiting mechanism 1 is provided with a limiting member 23, and the kick arm 21 is provided with a stop 23 that cooperates with it. The two work together, resulting in a simple structure and high reliability.

[0030] The kick arm 21 is provided with a pin seat 25 and an adjusting handle 26. The positioning pin 22 is movably mounted on the pin seat 25. The adjusting handle 26 is connected to the positioning pin 22. The positioning pin 22 is moved by the adjusting handle 26 to control its movement in and out of the positioning hole 32.

[0031] The pin seat 25 is provided with an elastic element installed on the positioning pin 22. The elastic element is sleeved on the positioning pin 22 and pushes it to engage with the positioning hole 32.

[0032] The kick arm 21 consists of two symmetrically arranged plates connected by a connecting block.

[0033] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A structure for reducing the idle travel of a cam in a leg trainer, the structure being applied to a leg trainer, characterized in that: It includes a limiting mechanism, a kicking mechanism, and a cam aluminum disc. The limiting mechanism is installed on the leg trainer and has a rotating part. The kicking mechanism has a kicking arm and a positioning pin. The kicking arm and the cam aluminum disc are coaxially rotatably mounted on the rotating part. The positioning pin is installed on the kicking arm and its angle is positioned by interlocking with the cam aluminum disc to adjust its stroke.

2. The structure for reducing the cam idle stroke of a leg trainer according to claim 1, wherein: The limiting mechanism includes a limiting arm and a pulley assembly. One end of the limiting arm is connected to the leg trainer, and the other end has a rotating hole and an internal rotating shaft to form a rotating part. The cam aluminum disc and the kick arm have openings that align with the rotating hole and are rotatably mounted on the same rotating shaft. The pulley assembly is rotatably mounted inside the limiting arm via the pulley shaft and has a steel wire rope inside that connects the cam aluminum disc and the counterweight of the leg trainer.

3. The structure for reducing the cam idle stroke of a leg trainer according to claim 2, wherein: The bottom of the cam aluminum disk is provided with a mounting part for installing a steel wire rope, and its side wall is provided with multiple positioning holes for engaging with positioning pins for positioning.

4. The structure for reducing cam idle travel in a leg trainer as described in claim 2, characterized in that: The bottom of the limiting arm is provided with a limiting member, and the kick arm is provided with a stop that cooperates with the limiting member. When the kick arm approaches the limiting arm, the stop abuts against the limiting member to prevent the kick arm from colliding with the limiting arm.

5. The structure for reducing cam idle travel in a leg trainer as described in claim 3, characterized in that: The kick arm is equipped with a pin seat and an adjusting handle. The positioning pin is movably mounted on the pin seat, and the adjusting handle is connected to the positioning pin. The positioning pin is moved by pulling the adjusting handle to control its movement in and out of the positioning hole.

6. The structure for reducing the cam idle stroke of a leg trainer according to claim 5, wherein: The pin seat is provided with an elastic element installed on the positioning pin. The elastic element is sleeved on the positioning pin and pushes it to engage with the positioning hole.

7. The structure for reducing the cam idle stroke of a leg trainer according to claim 1, wherein: The kick arm consists of two symmetrically arranged plates connected by a connecting block.

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