A bicycle harmonic reduction drive

Abstract

The utility model discloses a bicycle harmonic reduction drive arrangement relates to harmonic reducer technical field, including rigid wheel, the wave generator of being established in the flexible wheel in rigid wheel and being established in the flexible wheel, and the fixed connection of wave generator has the pivot, be equipped with the cooling assembly for the heat dissipation protection of flexible wheel in the flexible wheel, and the cooling assembly includes the several cooling fins of being established in fixed mounting in the flexible wheel, and the impeller of fixed mounting has on the pivot, be equipped with the hollow area for storing coolant in the flexible wheel. The utility model discloses through setting cooling assembly can make bicycle in the operation process, the pivot keeps on rotating, drives the rotation of impeller, and the coolant in the first cavity is made by impeller under centrifugal force and energy conversion effect through the connecting groove and enters the second cavity and absorbs heat, and through the liquid inlet, enters the pivot, and then through the liquid outlet, is affected by impeller again, thereby reaches the circulation of coolant, and the heat of coolant is absorbed and spreads outwards after the contact of coolant and cooling fin.

Description

Technical Field

[0001] This utility model relates to the field of harmonic reducer technology, and in particular to a bicycle harmonic reducer drive device. Background Technology

[0002] The bicycle harmonic reduction drive is an innovative mid-drive system. Through the deep integration of the harmonic reducer with the high-speed motor and sensors, it achieves a comprehensive upgrade in power transmission efficiency, structural compactness, and riding experience. The harmonic reducer in the bicycle harmonic reduction drive consists of three core components: a wave generator, a flexible wheel, and a rigid wheel.

[0003] Harmonic reducers have a small internal space and tightly packed components. While this structure achieves high-precision transmission, it restricts airflow, causing heat to accumulate inside and leading to temperature increases. Friction between components also contributes to the temperature rise. Since the flex wheel generates a lot of heat due to meshing friction, it is a key component that requires attention to heat dissipation. Relying on its own heat dissipation is ineffective and can easily lead to fatigue damage to parts and decreased precision over time.

[0004] Therefore, a bicycle harmonic deceleration drive device is proposed. Utility Model Content

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A bicycle harmonic deceleration drive device includes a rigid wheel, a flexible wheel disposed in the rigid wheel, and a wave generator disposed in the flexible wheel. A rotating shaft is fixedly connected to the wave generator. The flexible wheel is provided with a cooling component for heat dissipation protection. The cooling component includes a plurality of heat sinks fixedly installed in the flexible wheel. An impeller is fixedly installed on the rotating shaft. The flexible wheel is provided with a hollow area for storing coolant.

[0007] Preferably, the central control area includes a first cavity and a second cavity, and a plurality of connecting grooves are provided between the first cavity and the second cavity.

[0008] Preferably, the flexible wheel is rotatably connected to the shaft, and the heat sink is in contact with the coolant in the first cavity to absorb heat from the coolant.

[0009] Preferably, the rotating shaft is hollow and has several liquid outlets that are connected to the inner cavity of the rotating shaft.

[0010] Preferably, the rotating shaft has a plurality of drain ports, and the drain ports are connected to the inner cavity of the impeller.

[0011] Preferably, a plurality of stirring blades for enhancing the flow of coolant in the second cavity are fixedly connected to the rotating shaft, and the stirring blades are provided with notches and grooves.

[0012] Preferably, the flexible wheel is provided with a coolant filling port.

[0013] The beneficial effects of this utility model are:

[0014] This invention, by incorporating a cooling component, enables the bicycle's shaft to rotate continuously during operation, driving the impeller to rotate. The impeller causes the coolant in the first chamber to enter the second chamber through the connecting groove under the action of centrifugal force and energy conversion, absorbing heat. The coolant then enters the shaft through the outlet and is subsequently acted upon by the impeller again through the drain outlet, thus achieving coolant circulation. When the coolant comes into contact with the heat sink, the heat of the coolant is absorbed and dissipated outwards. Therefore, the flexible impeller achieves heat dissipation by absorbing heat through coolant circulation, thereby protecting the flexible impeller from overheating and damage. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a bicycle harmonic deceleration drive device according to an embodiment of the present invention;

[0016] Figure 2 This is a cross-sectional view of the rigid wheel structure of a bicycle harmonic deceleration drive device according to an embodiment of the present invention;

[0017] Figure 3 This invention relates to a bicycle harmonic reduction drive device. Figure 2 Enlarged structural diagram at point A in the middle;

[0018] Figure 4 This is a schematic diagram of the flexible wheel structure of a bicycle harmonic deceleration drive device according to an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of the shaft structure of a bicycle harmonic deceleration drive device according to an embodiment of the present invention.

[0020] The following are marked in the diagram: 1. Rigid wheel; 2. Flexible wheel; 3. Wave generator; 4. Shaft; 5. Heat sink; 6. Impeller; 7. First cavity; 8. Second cavity; 9. Connecting groove; 10. Flow port; 11. Drain port; 12. Stirring blade; 13. Notch groove; 14. Filling port. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to embodiments:

[0022] This utility model discloses a harmonic reduction drive device for bicycles. (Refer to...) Figure 1-4The system includes a rigid wheel 1, a flexible wheel 2 disposed within the rigid wheel 1, and a wave generator 3 disposed within the flexible wheel 2. A rotating shaft 4 is fixedly connected to the wave generator 3. The flexible wheel 2 is equipped with a cooling component for heat dissipation protection, which includes several heat sinks 5 fixedly installed within the flexible wheel 2. An impeller 6 is fixedly installed on the rotating shaft 4. The flexible wheel 2 has a hollow area for storing coolant.

[0023] By adopting the above technical solution, the heat generated by the flexible wheel 2 during use can be dissipated in time by setting up a cooling component, thereby reducing its own temperature and avoiding continuous high temperature that accelerates fatigue damage and affects the normal use of the entire device.

[0024] Reference Figure 1-5 The central control area includes a first cavity 7 and a second cavity 8. Several connecting grooves 9 are provided between the first cavity 7 and the second cavity 8. The flexible wheel 2 is rotatably connected to the rotating shaft 4. The heat sink 5 is in contact with the coolant in the first cavity 7 to absorb the heat in the coolant. When the entire device is in use, the flexible wheel 2 itself will generate a lot of heat. By setting coolant inside the first cavity 7 and the second cavity 8, the heat generated by the flexible wheel 2 can be absorbed by the coolant. And due to the setting of the heat sink 5, the heat sink 5 is in contact with the coolant, thereby absorbing the heat in the heat sink 5. Here, the material of the heat sink 5 is selected with high thermal conductivity and easy heat absorption, which is the prior art. Since a part of the heat sink 5 extends to the outside of the flexible wheel 2, it can contact the outside air and dissipate the heat to the outside, thereby achieving the purpose of heat dissipation and thus achieving the purpose of cooling the coolant.

[0025] Reference Figure 1-5The rotating shaft 4 is hollow and has several flow ports 10 connected to its inner cavity. It also has several drain ports 11 connected to the inner cavity of the impeller 6. The entire device is used on a bicycle. During use, while the bicycle is in motion, the rotating shaft 4 rotates continuously, driving the impeller 6 to rotate. The impeller 6, in its rotating state, continuously provides kinetic energy to the coolant in the first cavity 7, allowing it to enter the second cavity 8 through the connecting groove 9. The rotation of impeller 6 drives the movement of coolant through centrifugal force and energy conversion. Impeller 6 consists of multiple curved blades and is fixed on the rotating shaft 4. When impeller 6 rotates, the coolant between the blades is subjected to outward centrifugal force due to inertia and is thrown towards the outer edge of impeller 6. Under the action of centrifugal force, the coolant accelerates along the blade surface and flows from the middle of impeller 6 to the outer edge, significantly increasing its speed. This allows the coolant to obtain driving force to move. The coolant entering the second cavity 8 can enter the interior of the rotating shaft 4 through the outlet 10, and then enter the impeller 6 through the drain outlet 11 to obtain driving force again and move, thus achieving circulation.

[0026] Reference Figure 1-5 In the aforementioned circulating circulation, the coolant continuously absorbs heat from the flexible impeller 2, thereby cooling the impeller 2. After absorbing heat, the coolant comes into contact with the heat sink 5 during circulation, achieving the purpose of cooling down according to the aforementioned principle. Several stirring blades 12 are fixedly connected to the rotating shaft 4 to enhance the flow of coolant in the second cavity 8. The stirring blades 12 have notched grooves 13. During rotation, the rotating shaft 4 drives the stirring blades 12 to rotate, thus stirring the coolant in the second cavity 8 and enhancing its fluidity, resulting in better cooling. The coolant in the second cavity 8 contacts the flexible wheel 2 and absorbs heat. The notch 13 allows the coolant in the second cavity 8 to smoothly enter the outlet 10 and reach the inner cavity of the shaft 4. The flexible wheel 2 is provided with a coolant filling port 14, which facilitates the addition of coolant to the flexible wheel 2. During the operation of the bicycle, the rotation of the shaft 4 is powered by the pedals. The rotation of the shaft 4 causes the wave generator 3 to rotate, which in turn causes the flexible wheel 2 to rotate. The flexible wheel 2 drives the heat sink 5 to rotate. During the rotation, the heat sink 5 has better contact with the external airflow, and the air circulation around the heat sink 5 is better, which is conducive to its heat dissipation.

[0027] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0028] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bicycle harmonic deceleration drive device, comprising a rigid wheel (1), a flexible wheel (2) disposed in the rigid wheel (1), and a wave generator (3) disposed in the flexible wheel (2), characterized in that, A rotating shaft (4) is fixedly connected in the wave generator (3). The flexible wheel (2) is provided with a cooling component for heat dissipation protection of the flexible wheel (2). The cooling component includes several heat sinks (5) fixedly installed in the flexible wheel (2). An impeller (6) is fixedly installed on the rotating shaft (4). The flexible wheel (2) is provided with a hollow area for storing coolant.

2. The bicycle harmonic reduction drive device according to claim 1, characterized in that, The central control area includes a first cavity (7) and a second cavity (8), and a plurality of connecting grooves (9) are provided between the first cavity (7) and the second cavity (8).

3. The bicycle harmonic reduction drive device according to claim 1, characterized in that, The flexible wheel (2) is rotatably connected to the shaft (4), and the heat sink (5) is in contact with the coolant in the first cavity (7) to absorb heat from the coolant.

4. A bicycle harmonic reduction drive device according to claim 1, characterized in that, The rotating shaft (4) is hollow and has several liquid outlets (10) on it, and the liquid outlets (10) are connected to the inner cavity of the rotating shaft (4).

5. A bicycle harmonic reduction drive device according to claim 1, characterized in that, The rotating shaft (4) has several drain ports (11), and the drain ports (11) are connected to the inner cavity of the impeller (6).

6. A bicycle harmonic reduction drive device according to claim 1, characterized in that, A number of stirring blades (12) for enhancing the flow of coolant in the second cavity (8) are fixedly connected to the rotating shaft (4). The stirring blades (12) are provided with notches and grooves (13).

7. A bicycle harmonic reduction drive device according to claim 1, characterized in that, The flexible wheel (2) is provided with a coolant filling port (14).

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