Two-stage transmission structure and walking machine thereof

Abstract

According to the two-stage transmission structure, a fixing frame provided with a driving motor mounting hole position and a transmission shaft mounting sliding groove is arranged, a driving motor drives a driven belt wheel with an integrated transmission part and an output part through a transmission synchronous belt, and a transmission shaft horizontally slides through a position adjusting mechanism so as to adjust tensioning of a transmission belt. And an orthogonal two-way adjusting system is formed by matching with the horizontal strip-shaped hole of the fixing frame. The outer diameter of the transmission part of the driven belt wheel is larger than that of the driving belt wheel and the output part, non-equal-ratio two-stage speed change is formed, and the output part drives a walking machine roller through an output synchronous belt. The transmission shaft adjusting mechanism and the movable fixing frame are integrated through modular design, three-dimensional space compression and multi-model adaptation of the transmission system are achieved, the technical effects that the size is remarkably reduced, the maintenance efficiency is greatly improved, and the transmission system is compatible with various motor powers are achieved, and the technical problems that a traditional transmission structure is large in size, high in maintenance cost and poor in model adaptability are solved.

Description

Technical Field

[0001] This application relates to the field of fitness equipment technology, specifically to a two-stage transmission structure and its walking machine. Background Technology

[0002] With the increasing popularity of fitness equipment, machines such as walking machines and treadmills place higher demands on the compactness, ease of maintenance, and compatibility with multiple models of their power transmission systems. Traditional transmission structures often employ a one-piece design, which has the following drawbacks:

[0003] 1. Low space utilization: The fixed installation of the drive shaft and motor leads to structural redundancy, especially the large size of multi-stage transmission systems, which is difficult to adapt to the miniaturization trend of modern fitness equipment;

[0004] 2. High maintenance costs: The tension adjustment of the transmission belt relies on a single mechanical locking mechanism. Replacing parts requires complete disassembly, which takes 1-2 hours. Frequent disassembly and assembly can easily lead to wear on the mounting holes.

[0005] 3. Poor compatibility: The fixed architecture cannot adapt to motors of different power (such as 800W to 1500W), and equipment upgrades require redesigning the transmission layout, increasing manufacturing costs;

[0006] 4. Rapid decline in transmission efficiency: Traditional single-axis adjustment makes it difficult to achieve dynamic tension matching of multi-stage transmission belts, which can easily lead to problems such as belt slippage and excessive noise (>60dB).

[0007] To address the aforementioned issues, existing technologies have attempted to optimize transmission by adding auxiliary tensioners or improving belt materials, but these methods have failed to fundamentally resolve the contradiction between bulky structures and complex maintenance. Therefore, a transmission solution that combines compact modular design, multi-dimensional dynamic adjustment, and wide power adaptability is urgently needed. Utility Model Content

[0008] The purpose of this application is to address the aforementioned problems in the prior art by providing a two-stage transmission structure and a walking machine thereof.

[0009] To achieve the above-mentioned objectives, this application adopts the following technical solution: A two-stage transmission structure includes:

[0010] The mounting bracket has a drive motor mounting hole at one end and a drive shaft mounting groove at the other end.

[0011] The drive motor has a drive pulley mounted on its output shaft, which is connected to the driven pulley via a transmission synchronous belt.

[0012] The driven pulley is equipped with a transmission part and an output part. The outer diameter of the transmission part is larger than that of the driving pulley and the output part. The transmission part is driven and connected to the transmission synchronous belt. The output part and the transmission part are integrated into one structure so that power can be output through the output synchronous belt.

[0013] A drive shaft is rotatably connected to a driven pulley and is used to mount the driven pulley onto a drive shaft mounting groove. The drive shaft is provided with a position adjustment mechanism, which adjusts the horizontal position of the drive shaft in the drive shaft mounting groove and prevents the drive shaft from tilting.

[0014] The locking element is installed at the end of the drive shaft away from the drive unit and is used to lock and fix the drive shaft to the mounting bracket.

[0015] Furthermore, the mounting bracket is also provided with a horizontal strip hole, through which the horizontal position of the mounting bracket can be adjusted to guide the mounting bracket.

[0016] Furthermore, the position adjustment mechanism includes a limiting through hole on the drive shaft, a threaded hole on the fixed frame, a fulcrum structure, and an anti-tilting screw that is screwed into the threaded hole. The fulcrum structure serves as the fulcrum of the drive shaft and works with the anti-tilting screw to prevent the drive shaft from tilting.

[0017] Furthermore, the drive shaft mounting groove is also equipped with a limiting groove inside, which cooperates with the slider on the drive shaft to restrict the rotational freedom of the drive shaft.

[0018] Furthermore, the mounting bracket is also provided with a horizontal connecting hole, which is equipped with a tensioning screw, and the tension of the output timing belt is adjusted by the tensioning screw.

[0019] Furthermore, the outer diameter of the output section is larger than the outer diameter of the drive pulley.

[0020] Furthermore, the thickness at the connection between the fixed frame and the drive motor is less than the thickness at the connection between the fixed frame and the transmission shaft.

[0021] Furthermore, the mounting bracket has reinforcing ribs in the area between the drive motor and the transmission shaft.

[0022] A walking machine includes the aforementioned two-stage transmission structure, wherein the fixed frame of the two-stage transmission structure is detachably connected to the frame of the walking machine, and the output synchronous belt of the two-stage transmission structure is connected to the drive roller of the walking machine.

[0023] Furthermore, a cooling fan is provided for the drive motor of the two-stage transmission structure to dissipate heat.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. Compact and Innovative Structural Design: Traditional multi-stage transmission devices often require multiple independent components to achieve multi-stage transmission, resulting in a bulky size. This invention integrates the transmission and output parts into the driven pulley, completing two-stage transmission with only one synchronous belt system. This not only reduces the number of components but also significantly reduces the overall module's volume, decreasing the size by more than 30% compared to traditional structures, making miniaturization of the equipment possible. Furthermore, the mounting frame employs a differentiated thickness design, with a thinner section at the motor mounting and a thicker section at the drive shaft mounting, and reinforcing ribs in key areas. This reduces material consumption while enhancing the mounting frame's load-bearing capacity, achieving a balance between lightweight design and high strength.

[0026] 2. Convenient Adjustment Function: Existing tension adjustment methods are mostly single-adjustment, which cannot meet the different tension requirements of synchronous belts in two-stage transmissions. This utility model creatively adopts a dual tension adjustment system. The drive shaft achieves horizontal adjustment by limiting the sliding groove; the fixing bracket achieves horizontal adjustment through horizontal strip holes and tensioning screws. This design enables the synchronous belt tension adjustment accuracy to reach ±0.5N, and the adjustment efficiency is 3 times higher than that of traditional single adjustment mechanisms, ensuring that the synchronous belt is always in the optimal working state and extending the service life of the synchronous belt.

[0027] 3. Excellent adaptability: Traditional transmission structures and equipment frames are mostly fixed connections, resulting in poor motor compatibility and difficulties in upgrading and replacing motors. This utility model uses a standardized, detachable connection between the mounting bracket and the equipment frame, and the transmission shaft adjustment range can cover different motor models with diameter differences within 20mm. This means that without replacing the mounting bracket, it can easily adapt to various motors, making it suitable not only for fitness equipment such as walking machines and treadmills, but also significantly reducing upgrade costs when upgrading equipment, with compatibility far exceeding similar products.

[0028] 4. Excellent economic performance: The modular design of this invention supports independent production and assembly, reducing production steps and lowering production costs. Its two-stage reduction transmission can achieve a transmission ratio of 1.5-2.5, allowing the use of a smaller motor to achieve the same torque output, reducing motor power requirements by 25% and further lowering equipment costs. Furthermore, the cooling fan extends motor life, and the detachable modular design shortens maintenance time, significantly reducing the total lifespan cost of the equipment. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the two-stage transmission structure of this application;

[0030] Figure 2 This is a schematic diagram of the two-stage transmission structure of this application without the output synchronous belt;

[0031] Figure 3 yes Figure 2 Another perspective view;

[0032] Figure 4 This is a schematic diagram of the two-stage transmission structure of the walking machine described in this application;

[0033] Figure 5 This is a schematic diagram of the walking machine part of the two-stage transmission structure of this application;

[0034] Figure 6 This is a schematic diagram of the installation of the two-stage transmission structure of this application.

[0035] In the diagram, 100 is the two-stage transmission structure; 200 is the treadmill; 1 is the fixed frame; 2 is the drive motor; 3 is the driven pulley; 4 is the transmission shaft; 5 is the locking element; 6 is the transmission synchronous belt; 8 is the output synchronous belt; 201 is the cooling fan; 202 is the drive roller; 203 is the frame; 12 is the transmission shaft mounting groove; 121 is the limit groove; 13 is the horizontal strip hole; 14 is the tension screw; 15 is the threaded hole; 16 is the connecting hole; 17 is the fulcrum structure; 21 is the drive pulley; 41 is the transmission part; 42 is the output part; 43 is the slider; 71 is the limit through hole; and 72 is the anti-tilt screw. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0037] Those skilled in the art should understand that, in the disclosure of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this application.

[0038] Example 1

[0039] like Figure 1-3As shown, the two-stage transmission structure 100 of this utility model mainly includes a fixed frame 1, a drive motor 2, a driven pulley 3, a transmission shaft 4, and a locking component 5. The fixed frame 1 can be integrally die-cast from aluminum alloy (or injection molded from high-strength plastic), and is provided with drive motor mounting holes and transmission shaft mounting grooves 12. The mounting end of the drive motor 2 is thinner, while the mounting end of the transmission shaft 4 is thicker, and reinforcing ribs are provided in the middle area to improve structural strength. The output shaft of the drive motor 2 is equipped with a drive pulley 21, which drives the driven pulley 3 through a synchronous belt 6. The driven pulley 3 is integrally machined, and has a transmission part 41 with a larger diameter and an output part 42 with a smaller diameter. The surface of the transmission shaft 4 is specially treated and is provided with limiting through holes 71 for installing an adjustment mechanism.

[0040] In this system, the driving pulley 21 is connected to the transmission part 41 of the driven pulley 3 via the transmission timing belt 6, forming the first stage of transmission. When the drive motor 2 starts, the driving pulley 21 rotates, driving the transmission part 41 of the driven pulley 3 to rotate via the transmission timing belt 6. The output part 42 of the driven pulley 3 then outputs power through the output timing belt 8, realizing the second stage of transmission. During this process, if the transmission timing belt 6 or the output timing belt 8 is found to be loose, the position adjustment mechanism on the drive shaft 4 can be operated.

[0041] In this embodiment, the position of the drive shaft 4 is adjusted as follows:

[0042] The drive shaft 4 engages with the limiting groove 121 of the fixed frame 1 via the slider 43, enabling precise horizontal movement. The specific arrangement of the drive shaft 4 and the drive shaft mounting groove 121 is not limited; any structure that provides a guiding function should be considered within the scope of this solution. The anti-tilt screw 72 can be screwed into the threaded hole 15 on the limiting groove 121. The fulcrum structure 17 (parallel to the threaded hole 15; it can be a set screw mounted on the fixed frame 1 or other parts; any component achieving the same function should be considered within the scope of this solution) serves as the fulcrum for the drive shaft 4. The anti-tilt screw 72, on the other side, effectively uses a lever principle to fix the drive shaft 4, preventing tilting due to the cantilever moving away. The other end of the drive shaft 4 is limited by a clamp. This design ensures both adjustment accuracy and operational stability.

[0043] In this embodiment, the horizontal adjustment of the fixing frame 1 is as follows:

[0044] A horizontal slot 13 is provided at the bottom of the mounting bracket 1, which is connected to the equipment frame 203 by bolts. After loosening the bolts, the mounting bracket 1 can be moved horizontally along the horizontal slot 13, thereby achieving horizontal guidance for the mounting bracket 1. Preferably, there are two horizontal slots 13 to ensure that the mounting bracket 1 will not be tilted. This design greatly improves the compatibility of the equipment with different models. Preferably, the mounting bracket 1 is also provided with a horizontal connecting hole 16, on which a tensioning screw 14 is provided. The tensioning screw 14 passes through the equipment frame 203 and is screwed into the connecting hole 16. The tension of the output synchronous belt 8 can be further adjusted by adjusting the tensioning screw 14. Structures that use other forms, such as pushing or force-pushing, to adjust the tension of the output synchronous belt 8 should be considered to fall within the protection scope of this solution.

[0045] In this embodiment, the synchronous belt can be replaced with a chain, belt, or other transmission component, but a synchronous belt is preferred due to its higher precision and lower noise. Other similar transmission methods should also be considered within the scope of protection of this application.

[0046] Example 2

[0047] like Figure 4-6 As shown, this two-stage transmission structure 100 is applied to a walking machine 200 (or a treadmill or similar fitness equipment). The fixing frame 1 of the two-stage transmission structure 100 is detachably connected to the frame 203 of the walking machine 200 by two screws, and then fixed with tension screws 14. The output synchronous belt 8 of the two-stage transmission structure 100 is driven and connected to the drive roller 202 of the walking machine 200. When the drive motor 2 runs, the power is transmitted to the drive roller 202 through the two-stage transmission, driving the conveyor belt of the walking machine 200 to run.

[0048] To dissipate heat from the drive motor 2, a cooling fan 201, model DF-12025, is installed next to the drive motor 2. This fan has an airflow of 150m³ / h. 3 / h can effectively reduce the operating temperature of the drive motor 2, extend the service life of the motor, and ensure the stable operation of the treadmill 200.

[0049] The parts not described in detail in this application are prior art, and therefore are not described in detail in this application.

[0050] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0051] Although this document uses a significant amount of technical terminology, the possibility of using other terms is not excluded. These terms are used merely to facilitate the description and explanation of the nature of this application; interpreting them as any additional limitation would be contrary to the spirit of this application.

[0052] This application is not limited to the above-described preferred embodiments. Anyone can derive other products in various forms under the guidance of this application. However, regardless of any changes made to their shape or structure, any technical solution that is the same as or similar to that of this application falls within the protection scope of this application.

Claims

1. A two-stage transmission structure, characterized in that, include: The fixed frame (1) has a drive motor (2) mounting hole at one end and a drive shaft mounting groove (12) at the other end; The drive motor (2) has a drive pulley (21) mounted on its output shaft. The drive pulley (21) is connected to the driven pulley (3) via a transmission synchronous belt (6). The driven pulley (3) is provided with a transmission part (41) and an output part (42). The outer diameter of the transmission part (41) is larger than that of the driving pulley (21) and the output part (42). The transmission part (41) is driven and connected to the transmission synchronous belt (6). The output part (42) and the transmission part (41) are an integral structure so that power can be output through the output synchronous belt (8). A drive shaft (4) is rotatably connected to the driven pulley (3) for mounting the driven pulley (3) on the drive shaft mounting groove (12). The drive shaft (4) is provided with a position adjustment mechanism, which adjusts the horizontal position of the drive shaft (4) on the drive shaft mounting groove (12) and prevents the drive shaft (4) from tilting. A locking member (5) is installed at one end of the drive shaft (4) away from the drive part (41) to lock and fix the drive shaft (4) to the fixing frame (1).

2. The two-stage transmission structure according to claim 1, characterized in that, The fixing frame (1) is also provided with a horizontal strip hole (13), through which the horizontal position of the fixing frame (1) can be adjusted to guide the fixing frame (1).

3. The two-stage transmission structure according to claim 1, characterized in that, The position adjustment mechanism includes a limiting through hole (71) on the drive shaft (4), a threaded hole (15) on the fixing frame (1), a fulcrum structure (17), and an anti-tilting screw (72) screwed into the threaded hole (15). The fulcrum structure (17) serves as the fulcrum of the drive shaft (4) and works with the anti-tilting screw (72) to prevent the drive shaft (4) from tilting.

4. The two-stage transmission structure according to claim 3, characterized in that, The drive shaft mounting groove (12) is also provided with a limiting groove (121), which cooperates with the slider (43) on the drive shaft (4).

5. A two-stage transmission structure according to claim 2, characterized in that, The fixing frame (1) is also provided with a horizontal connecting hole (16), and a tensioning screw (14) is provided on the connecting hole (16) to adjust the tension of the output synchronous belt (8).

6. The two-stage transmission structure according to claim 1, characterized in that, The outer diameter of the output section (42) is larger than the outer diameter of the drive pulley (21).

7. A two-stage transmission structure according to any one of claims 1-6, characterized in that, The thickness of the connection between the fixed frame (1) and the drive motor (2) is less than the thickness of the connection between the fixed frame (1) and the transmission shaft (4).

8. A two-stage transmission structure according to claim 7, characterized in that, The fixing frame (1) is provided with reinforcing ribs in the area between the drive motor (2) and the transmission shaft (4).

9. A walking machine, characterized in that, The invention includes a two-stage transmission structure as described in any one of claims 1-8, wherein the fixed frame (1) of the two-stage transmission structure is detachably connected to the frame (203) of the treadmill, and the output synchronous belt (8) of the two-stage transmission structure is drivenly connected to the drive roller (202) of the treadmill.

10. A treadmill according to claim 9, characterized in that, It also includes a cooling fan (201) for cooling the drive motor (2) of the secondary transmission structure.

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