A gear adjustment mechanism and an exercise apparatus having the same

Abstract

The utility model provides a gear adjusting mechanism and fitness equipment with the adjusting mechanism, include: gear base, have a plurality of continuous on -off gear hole, adjusting end has a knob screw rod that can pass to the knob screw rod of one side to gear hole other side, adjusting knob, along the axial sliding is equipped in the one side of knob screw rod and passes out gear hole, has a gear fixed structure with gear hole limit cooperation and a positioner structure with knob screw rod cooperation to make gear fixed structure fixed in the gear hole of corresponding position, the utility model discloses through operating adjusting knob, makes it switch under the limit cooperation of gear hole with different position and the state of separation, to make the adjusting end of output side can conveniently realize the switching of different gear position.

Description

Technical Field

[0001] This utility model relates to the technical field of gear adjustment mechanisms, and in particular to a gear adjustment mechanism and fitness equipment having the adjustment mechanism. Background Technology

[0002] In the field of sports and fitness equipment technology, existing traditional fitness equipment is usually equipped with a variety of adjustment mechanisms. Taking common treadmills and exercise bikes as examples, they are generally equipped with resistance adjustment devices, seat height adjustment structures or running belt speed control systems. Through mechanical knobs, electronic touch controls and other adjustment methods, users of different ages, body types and exercise levels can make personalized adjustments to parameters such as exercise intensity and posture angles, thereby meeting diverse fitness needs.

[0003] Specifically, for elliptical trainers, the current mainstream products generally employ a fixed stride length and fixed stride arc transmission scheme in their mechanical structure design. This scheme, through welding or bolting, fixes the motion trajectory parameters of the pedal linkage mechanism, resulting in the inability to dynamically adjust the stride length (i.e., the maximum lateral distance the left and right pedals extend during movement) and stride arc (the radius of curvature of the pedal's motion trajectory). However, in real-world usage scenarios, different users have significantly different body parameters; for example, height can range from 150cm to 200cm, and leg length ratios, joint mobility, and exercise habits also vary.

[0004] For taller users, a fixed small stride can restrict the range of motion of the lower limbs and cause tension in the thigh muscles; while for shorter users, using a fixed large stride elliptical machine may increase the pressure on the knee joint due to excessive joint extension.

[0005] Furthermore, different exercise goals, such as fat loss training, muscle endurance training, or rehabilitation training, have different requirements for the dynamic changes in stride length and stride arc. Existing elliptical trainers with fixed parameters cannot provide a comfortable exercise trajectory for users' personalized needs, resulting in low exercise efficiency and increased risk of joint injury, making it difficult to meet the modern fitness market's demand for precise and humanized exercise equipment.

[0006] Therefore, it is still necessary to design a mechanism that facilitates gear adjustment to address the aforementioned adjustment requirements.

[0007] In view of this, the inventor has specifically designed a gear adjustment mechanism and a fitness equipment having the adjustment mechanism, which leads to this invention. Utility Model Content

[0008] To solve the above problems, one of the technical solutions of this utility model is as follows:

[0009] A gear adjustment mechanism, comprising:

[0010] The gear shift base has several continuously connected gear shift holes;

[0011] The adjustment end has a knob screw that can pass through one side to the other side of the gear hole;

[0012] The adjustment knob is slidably disposed on one side of the knob screw that protrudes from the gear position hole along the axial direction. It has a gear position fixing structure that is limited and matched with the gear position hole, and a positioning structure that is matched with the knob screw to fix the gear position fixing structure in the gear position hole at the corresponding position.

[0013] Preferably, the gear base has two opposing walls, a plurality of gear holes are disposed on one of the walls, and a continuously distributed connecting groove is provided between the two walls, the connecting groove being connected to each gear hole.

[0014] Preferably, the distance between the two sides of the connecting groove is smaller than the inner diameter of the stop hole.

[0015] Preferably, the knob screw is detachably connected to the adjustment end.

[0016] Preferably, the method further includes an elastic element disposed between the knob screw and the adjusting knob, for generating an elastic force so that the gear fixing structure moves toward the gear hole.

[0017] Preferably, the adjustment knob has a first cavity and a second cavity with gradually increasing inner diameter along the axial direction, the knob screw includes a connecting section and a guide section that are respectively clearance-fitted with the first cavity and the second cavity, and the elastic element is a spring and is located between the connection position of the connecting section and the guide section and the connection position of the first cavity and the second cavity.

[0018] Preferably, the adjustment knob includes a knob body and a linkage sleeve axially embedded in the knob body, one end of the linkage sleeve forming a bushing-shaped gear fixing structure that engages with the gear hole.

[0019] Preferably, the knob body has a mounting hole extending through it along its axial direction, one end of the mounting hole narrows inward to form a stop hole that is clearance-fitted with the end of the knob screw, and the end of the knob screw is provided with a nut portion that is limited and fitted with the stop hole.

[0020] Preferably, the end of the linkage sleeve away from the gear fixing structure and the side of the mounting hole close to the stop hole have a rotation limiting structure to limit the circumferential rotation of the linkage sleeve.

[0021] The second technical solution of this utility model is as follows:

[0022] A fitness device comprising the aforementioned gear adjustment mechanism.

[0023] The beneficial effects of this utility model are as follows:

[0024] This invention allows for easy switching between different gear positions by simply operating the adjustment knob, which switches between being engaged with and disengaged from different position holes.

[0025] In addition, the elastic element generates a spring force on the adjustment knob, keeping it moving close to the gear position hole. This allows the limiting structure to automatically insert into the nearest gear position hole below it during adjustment, preventing the adjustment knob from falling off and causing an accident. Attached Figure Description

[0026] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0027] in:

[0028] Figure 1 This is an exploded structural diagram of Embodiment 1 of this utility model;

[0029] Figure 2 This is a partial exploded and cross-sectional structural diagram of Embodiment 1 of this utility model;

[0030] Figure 3 This is a cross-sectional structural schematic diagram of Embodiment 1 of this utility model;

[0031] Figure 4 This is a partial exploded view of the adjustment knob in Embodiment 1 of this utility model;

[0032] Figure 5 This is a partial exploded and cross-sectional structural diagram highlighting the adjustment knob in Embodiment 1 of this utility model;

[0033] Figure 6 This is a partial exploded structural diagram of Embodiment 2 of this utility model.

[0034] Label Explanation:

[0035] 100. Gear base; 110. Gear hole; 120. Guide slope; 130. Wall; 140. Connecting groove; 200. Adjusting end; 210. Bearing component; 220. Fixed shaft; 230. Bearing spacer; 300. Adjusting knob; 310. Knob body; 311. Mounting hole; 312. Stop hole; 313. Mounting groove; 314. Mating groove; 320. Linkage sleeve; 321. First cavity; 322. Second cavity; 323. Rotation limit structure; 330. Gear fixing structure; 400. Knob screw; 410. Nut part; 420. Connecting section; 421. Positioning end; 422. Connecting end; 430. Guide section; 500. Elastic element; 600. Protective pad cover; 700. Body; 710. Flywheel; 720. Handlebar; 730. Pedal linkage assembly. Detailed Implementation

[0036] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer and more understandable, 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 only used to explain this utility model and are not intended to limit this utility model. Example 1

[0037] Please see Figures 1 to 5 This is a gear adjustment mechanism, which is the preferred embodiment of the present utility model. It includes a gear base 100, an adjustment end 200, and an adjustment knob 300, as detailed below:

[0038] like Figure 1 As shown, the gear base 100 is integrally mounted on the handlebar of the elliptical machine and is hinged to the pedal linkage 730 of the elliptical machine, thus serving as the motion structure base of the entire elliptical machine. It has several continuously connected gear holes 110. In addition, an inclined guide slope 120 is provided around the outer side of the gear hole 110 to facilitate the insertion of the gear fixing structure 330 on the adjustment knob 300.

[0039] In this embodiment, the gear base 100 is generally square tube shaped, with two opposite and parallel wall surfaces 130. The gear holes 110 are round holes and are continuously distributed in a straight line on one of the wall surfaces 130. A straight-line distributed connecting groove 140 is provided between the two wall surfaces 130, and the connecting groove 140 connects each gear hole 110.

[0040] In this embodiment, the distance between the two sides of the connecting groove 140 is smaller than the inner diameter of the stop hole 110.

[0041] like Figure 1 , 2As shown in Figure 3, the adjustment end 200 serves as the connection base to the pedal linkage assembly 730 of the elliptical machine. It is fixedly connected to the pedal linkage and is in the shape of a sleeve. It has a knob screw 400 that can pass through one side to the other side of the gear hole 110.

[0042] Specifically, such as Figure 2 , 3 As shown, the knob screw 400 is detachably connected to the adjustment end 200. The adjustment end 200 is axially hinged to a fixed shaft 220 via a bearing component 210. The end face of the adjustment end 200 is in contact with the wall surface 130 of the gear base 100 via a bearing spacer 230. One end of the fixed shaft 220 extends into the space between the two walls 130. The axial end of the knob screw 400 is threadedly connected to the end of the fixed shaft 220. Based on this, the other end of the fixed shaft 220 passes through the connecting groove 140 or the gear hole 110 to the outside of the wall surface 130, serving as the mounting base for the adjustment knob 300.

[0043] like Figure 3 , 4 As shown in Figure 5, the adjustment knob 300 is slidably disposed on one side of the knob screw 400 that protrudes from the gear position hole 110. It has a gear position fixing structure 330 that is limited and cooperates with the gear position hole 110, and a positioning structure (not shown in the figure) that cooperates with the knob screw 400 to fix the gear position fixing structure 330 in the gear position hole 110 at the corresponding position.

[0044] Specifically, the adjustment knob 300 includes a knob body 310 and a linkage sleeve 320 axially embedded in the knob body 310. One end of the linkage sleeve 320 forms a bushing-shaped gear fixing structure 330 that fits into the gear hole 110. In this embodiment, the gear fixing structure 330 is a circular sleeve and is adapted to the shape of the gear hole 110.

[0045] Specifically, in combination Figure 4 , 5 The knob body 310 has a mounting hole 311 extending through it along its axial direction. The end of the mounting hole 311 located inside the knob body 310 tapers inward to form a stop hole 312 that is clearance-fitted with the end of the knob screw 400. The end of the knob screw 400 is provided with a nut portion 410 that is limited and fitted with the stop hole 312. The other side of the knob body 310 located at the stop hole 312 forms a mounting groove 313, and the nut portion 410 is limited within the mounting groove 313.

[0046] In addition, combined Figure 3 , 5The linkage sleeve 320 is provided with a first cavity 321 and a second cavity 322 with gradually increasing inner diameter along the axial direction. The knob screw 400 includes a connecting section 420 and a guide section 430 that are respectively clearance-fitted with the first cavity 321 and the second cavity 322. An elastic element 500 is also movably sleeved on the periphery of the connecting section 420. The elastic element 500 is specifically a spring, and its end is movably abutted against the connection position between the connecting section 420 and the guide section 430.

[0047] The diameter of the second cavity 322 is the same as the diameter of the stop hole 312, so that the guide section 430 of the knob screw 400 can smoothly pass through the second cavity 322 and the stop hole 312 in sequence. In order to prevent the linkage sleeve 320 from rotating synchronously with the knob body 310 when the knob body 310 is operated, the end of the linkage sleeve 320 away from the gear fixing structure 330 and the side of the mounting hole 311 close to the stop hole 312 have a rotation limiting structure 323 to limit the circumferential rotation of the linkage sleeve 320. In this embodiment, the limiting structure is set in the linkage. Several limiting surfaces are provided on the periphery of the end of the sleeve 320. The mounting hole 311 is provided with a mating groove 314 that is limited and matched with the limiting surface at the position near the stop hole 312. The mating groove 314 is connected to the mounting hole 311 and the stop hole 312 on both sides. Thus, when the linkage sleeve 320 is inserted into the knob body 310 along the opening of the mounting hole 311, the limiting surface and the mating surface form a limit, which prevents the linkage sleeve 320 from rotating circumferentially relative to the knob body 310. This makes it easier to operate the knob body 310 and control the entire adjustment knob 300.

[0048] During installation, first, the spring is fitted onto the connecting section 420. Then, the entire knob screw 400 is inserted into the stop hole 312 along the mounting groove 313 until the nut 410 and the stop hole 312 are in a limiting position. Next, the linkage sleeve 320 is inserted along one side of the connecting section 420 of the knob screw 400, so that the connecting section 420 is finally fitted into the first cavity 321 and the two ends of the spring abut against the connection position of the first cavity 321 and the second cavity 322, and the connection position of the connecting section 420 and the guide section 430, respectively. Finally, the entire knob screw 400 is passed through the position hole in sequence. The connecting groove 140 on the other wall 110 and the other wall 130 is finally threaded to the end of the fixed shaft 220. The entire adjusting knob 300 can be fixed relative to the gear base 100 by relying on the adjusting end 200 and the knob screw 400. By pushing and pulling the knob body 310 along the axis, the sleeve-shaped gear fixing structure 330 can enter the gear hole 110 for limiting or disengage from the gear hole 110 to release the limiting. Thus, the entire adjusting end 200 can be switched between multiple gear holes 110 under the control of the adjusting knob 300, so as to conveniently realize the gear adjustment.

[0049] The width of the connecting groove 140, which connects multiple gear holes 110, should be adapted to the outer diameter of the connecting section 420 of the knob screw 400, so that after the gear fixing structure 330 is disengaged from the gear hole 110, the entire knob screw 400 can slide along the connecting groove 140.

[0050] Furthermore, in combination Figure 4 , 5 As shown, the connecting section 420 is divided into a positioning end 421 that is threadedly connected to the first cavity 321 and a connecting end 422 that is threadedly connected to the fixed shaft 220. A threaded structure is provided between the positioning end 421 and the first cavity 321, which constitutes the aforementioned positioning structure to fix the position of the adjusting knob 300 on the knob screw 400. Under normal conditions, the positioning end 421 is threadedly connected to the first cavity 321, and the gear fixing structure 330 on the linkage sleeve 320 is located in the gear hole 110, and the adjusting end 200 cannot be adjusted. When the gear is to be adjusted, firstly, by rotating the knob body 310, the linkage sleeve 320 is rotated, and the first cavity 321 of the linkage sleeve 320 is unscrewed from the positioning end 421. At this time, the entire adjusting knob 300 can be adjusted along the knob screw. The axial direction of the adjustment knob 400 is slid away from the gear position hole 110. After the gear position fixing structure 330 is pulled out of the gear position hole 110, the adjustment end 200 can be moved to the position of another gear position hole 110 along the connecting groove 140. During this process, as the adjustment knob 300 moves along the axial direction of the knob screw 400, the spring is compressed and in an energy storage state. After reaching the position of the next gear position hole 110, if the knob body 310 is released, under the action of the spring, the knob body 310 and the linkage sleeve 320 are synchronously pushed towards the gear position hole 110. The gear position fixing structure 330 re-enters the new gear position hole 110 for limiting. Finally, the knob body 310 is tightened so that the positioning end 421 and the first cavity 321 are re-threaded, thereby fixing the position of the adjustment end 200.

[0051] In particular, in this embodiment, the linkage sleeve 320 and the knob body 310 are locked together, that is, they will not separate from each other along the axial direction of the linkage sleeve 320, thereby enabling the knob body 310 and the linkage sleeve 320 to move synchronously.

[0052] In addition, a protective gasket 600 is fitted on the knob screw 400 near the nut part 410 to prevent the nut part 410 from directly contacting the knob body 310 and causing the knob body 310 to wear too quickly. Example 2

[0053] Please see Figures 1 to 5 This is a fitness equipment as an embodiment 2 of the present utility model, which includes a gear adjustment mechanism.

[0054] Specifically, in this embodiment, the fitness equipment includes a body 700, a flywheel 710 mounted on the body 700, handlebars 720 mounted on both sides of the body 700, and a pedal linkage assembly 730. The pedal linkage assembly 730 whose position needs to be adjusted has an adjustment end 200 at its end, and a gear base 100 is mounted on the handlebars 720. Thus, by adjusting the gear adjustment mechanism, the position of the pedal linkage assembly 730 on the handlebars 720 is adjusted, thereby changing the step distance and stride of the pedal operation.

[0055] The interconnections between the flywheel 710, the body 700, the handlebars 720, and the pedal linkage 730 are common structures in elliptical trainers, and their principles and connections are common knowledge, so they will not be elaborated here.

[0056] The beneficial effects of this utility model are as follows:

[0057] This utility model allows the adjustment knob 300 to switch between different positions by operating it and engaging or disengaging with the position holes 110, thereby enabling the adjustment end 200, which serves as the output side, to easily switch between different positions.

[0058] In addition, the elastic element 500 generates a spring force on the adjustment knob 300, keeping it moving close to the gear position hole 110. Thus, during the adjustment process, the limiting structure can automatically insert into the nearest gear position hole 110 below it, preventing the adjustment knob 300 from falling off and causing an accident.

[0059] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A gear adjustment mechanism, characterized in that, include: The gear base (100) has several continuously connected gear holes (110). The adjustment end (200) has a knob screw (400) that can pass through one side to the other side of the gear hole (110). The adjustment knob (300) is slidably disposed on the side of the knob screw (400) that protrudes from the gear position hole (110) along the axis. It has a gear position fixing structure (330) that is limited and matched with the gear position hole (110) and a positioning structure that is matched with the knob screw (400) to fix the gear position fixing structure (330) in the gear position hole (110) at the corresponding position.

2. The gear adjustment mechanism according to claim 1, characterized in that, The gear base (100) has two opposing walls (130), and a plurality of gear holes (110) are provided on one of the walls (130). A continuously distributed connecting groove (140) is provided between the two walls (130), and the connecting groove (140) connects each gear hole (110).

3. The gear adjustment mechanism according to claim 2, characterized in that, The distance between the two sides of the connecting groove (140) is smaller than the inner diameter of the stop hole (110).

4. The gear adjustment mechanism according to claim 1, characterized in that, The knob screw (400) is detachably connected to the adjustment end (200).

5. The gear adjustment mechanism according to claim 1, characterized in that, The device also includes an elastic element (500) disposed between the knob screw (400) and the adjustment knob (300) for generating an elastic force so that the gear fixing structure (330) moves toward the gear hole (110).

6. The gear adjustment mechanism according to claim 5, characterized in that, The adjustment knob (300) is provided with a first cavity (321) and a second cavity (322) with gradually increasing inner diameter along the axial direction. The knob screw (400) includes a connecting section (420) and a guide section (430) that are respectively clearance-fitted with the first cavity (321) and the second cavity (322). The elastic element (500) is a spring and is located between the connection position of the connecting section (420) and the guide section (430) and the connection position of the first cavity (321) and the second cavity (322).

7. The gear adjustment mechanism according to claim 1, characterized in that, The adjustment knob (300) includes a knob body (310) and a linkage sleeve (320) axially embedded in the knob body (310). One end of the linkage sleeve (320) forms a bushing-shaped gear fixing structure (330) that engages with the gear hole (110).

8. The gear adjustment mechanism according to claim 7, characterized in that, The knob body (310) has a mounting hole (311) extending through it along its axial direction. One end of the mounting hole (311) is recessed inward to form a stop hole (312) that is clearance-fitted with the end of the knob screw (400). The end of the knob screw (400) is provided with a nut part (410) that is limited and fitted with the stop hole (312).

9. A gear adjustment mechanism according to claim 8, characterized in that, The end of the linkage sleeve (320) away from the gear fixing structure (330) and the side of the mounting hole (311) close to the stop hole (312) have a rotation limiting structure (323) that limits the circumferential rotation of the linkage sleeve (320).

10. A fitness equipment, characterized in that, It includes the gear adjustment mechanism as described in claim 1.

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