Reduction transmission mechanism, reduction gear box and electric skateboard

Abstract

The utility model discloses a speed reduction transmission mechanism, a speed reduction gear box and an electric skateboard, and particularly discloses a speed reduction transmission mechanism which comprises a driving gear and a driven gear, the driving gear is connected with the driving end of a driving motor and used for driving the driven gear to rotate, and the driven gear rotates to drive the electric skateboard to move. The transmission device further comprises a secondary reduction gear which is respectively connected with the driving gear and the driven gear in a meshed mode, and it can be understood that the secondary reduction gear is additionally arranged between the driving gear and the driven gear to reduce the number of gear teeth of the driven gear, so that the outer diameter of the driven gear is reduced, and the service life of the transmission device is prolonged. The overall dimension of the reduction gear box is reduced, the ground clearance of the reduction gear box is increased, and the trafficability of the sliding plate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric skateboard transmission mechanisms, in particular to a reduction transmission mechanism, a reduction gear box and an electric skateboard. Background Art

[0002] At present, the common transmission structures of electric skateboards on the market include belt drive, gear drive, and direct drive (hub motor). Belt drive and gear drive are both primary drive. It is understandable that in order to increase the torque during use, the electric skateboard needs to increase the reduction ratio. When the number of driving gears is constant, the number of driven teeth needs to be greatly increased, which leads to an increase in the overall dimensions of the reduction gear box and a reduction in the clearance of the reduction gear box from the ground, which seriously affects the passability of the skateboard. Utility Model Content

[0003] The purpose of the utility model is to address the technical problems existing in the background technology and to propose a reduction transmission mechanism, including a driving gear and a driven gear. The driving gear is connected to the driving end of the driving motor and is used to drive the driven gear to rotate. The driven gear rotates to drive the electric skateboard to move. The utility model also includes a secondary reduction gear, which is respectively meshed and connected with the driving gear and the driven gear.

[0004] Furthermore, the secondary reduction gear includes a first gear unit and a second gear unit, the first gear unit is meshed and connected with the driving gear, and the second gear unit is meshed and connected with the driven gear.

[0005] Further, the second gear unit is arranged at one side of the first gear unit and rotates coaxially with the first gear unit.

[0006] Further, the number of gear teeth of the first gear unit is greater than the number of gear teeth of the second gear unit.

[0007] Further, an outer diameter of the first gear unit is greater than an outer diameter of the second gear unit.

[0008] Furthermore, the number of teeth of the driven gear is greater than the number of teeth of the driving gear.

[0009] Further, the outer diameter of the driven gear is greater than the outer diameter of the driving gear.

[0010] Furthermore, the utility model also provides a reduction gear box, comprising the reduction transmission mechanism of the utility model.

[0011] Furthermore, the utility model also provides an electric skateboard, comprising a reduction gear box of the utility model.

[0012] Compared with the prior art, the utility model has the following beneficial technical effects: the transmission mechanism of the utility model reduces the number of teeth of the driven gear by adding a secondary reduction gear between the driving gear and the driven gear, thereby reducing the outer diameter of the driven gear, thereby reducing the overall dimensions of the reduction gear box, increasing the ground clearance of the reduction gear box, and improving the passability of the skateboard. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a connection diagram between the reduction transmission mechanism, the reduction gear box, and the electric skateboard;

[0014] Figure 2 This is a diagram showing the connection relationship between the components of the reduction transmission mechanism. DETAILED DESCRIPTION

[0015] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0016] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or a specific connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0018] The specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0019] like Figure 1-Figure 2As shown, the utility model proposes a reduction transmission mechanism, including a driving gear 11 and a driven gear 12. The driving gear 11 is arranged at the driving end of the driving motor 13, and the driven gear 12 is connected to the transmission shaft 21 of the electric skateboard 2. The driven gear 12 rotates to drive the driven gear 12 to rotate, so as to drive the electric skateboard 2 to move. Furthermore, in this embodiment, the outer diameter of the driven gear 12 is greater than the outer diameter of the driving gear 11, and the number of teeth of the driven gear 12 is greater than the number of teeth of the driving gear 11, so as to improve the reduction ratio of the reduction transmission mechanism and increase the torque of the electric skateboard.

[0020] Furthermore, the reduction transmission mechanism of the present embodiment further includes a secondary reduction gear 14 , which is disposed between the driving gear 11 and the driven gear 12 , and is meshedly connected with the driving gear 11 and the driven gear 12 , respectively.

[0021] It can be understood that the transmission mechanism of this embodiment reduces the number of teeth of the driven gear 12 by adding a secondary reduction gear 14 between the driving gear 11 and the driven gear 12, thereby reducing the outer diameter of the driven gear 12, thereby reducing the overall dimensions of the reduction gear box, increasing the ground clearance of the reduction gear box, and improving the passability of the skateboard.

[0022] Furthermore, in this embodiment, the secondary reduction gear 14 includes a first gear unit 141 and a second gear unit 142. The second gear unit 142 is arranged on one side of the first gear unit 141 and rotates coaxially with the first gear unit 141. The first gear unit 141 is meshed and connected with the driving gear 11, and the second gear unit 142 is meshed and connected with the driven gear 12.

[0023] Specifically, in this embodiment, the number of gear teeth of the first gear unit 141 is greater than the number of gear teeth of the second gear unit 142 , and the outer diameter of the first gear unit 141 is greater than the outer diameter of the second gear unit 142 .

[0024] Through the above-mentioned structural setting, the first gear unit 141 can achieve a first-stage deceleration of the driving gear 11. When the first gear unit 141 rotates, it will synchronously drive the second gear unit 142 to rotate. The rotating second gear unit 142 can achieve a second-stage deceleration of the driven gear 12. It can be understood that according to the formula of the second-stage gear reduction ratio, it can be obtained that: the total reduction ratio is equal to the product of the front and rear two-stage reduction ratios. Under the condition of achieving the same reduction ratio, this embodiment can greatly reduce the outer diameter and the number of teeth of the driven gear 12 by setting the second-stage reduction gear 14, so as to reduce the volume of the reduction gear box. It should be noted that the reduction in the outer diameter and the number of teeth of the driven gear 12 depends on the ratio of the number of teeth of the first gear unit 141 to the number of teeth of the second gear unit 142. In actual application, the designer can flexibly set the ratio of the number of teeth of the first gear unit 141 to the number of teeth of the second gear unit 142 according to user needs to adapt to different application environments.

[0025] Furthermore, this embodiment also provides a reduction gearbox 22, including the reduction transmission mechanism of this embodiment. It can be understood that the reduction transmission mechanism of this embodiment can greatly reduce the number of teeth and the outer diameter of the driven gear 12, thereby reducing the overall dimensions of the reduction gearbox 22.

[0026] Furthermore, the present embodiment also provides an electric skateboard, including the reduction gearbox of the present embodiment. It can be understood that because the reduction gearbox 22 of the present embodiment has a smaller volume when providing the same torque or reduction ratio, the passability of the skateboard is greatly improved.

[0027] The above are one or more implementation methods provided in combination with specific content, and it is not intended that the specific implementation of the utility model is limited to these descriptions. Any method, structure, etc. similar to or identical to the method, structure, etc. of the utility model, or any technical deduction or replacement based on the concept of the utility model, shall be deemed to be within the protection scope of the utility model.

Claims

1. A reduction transmission mechanism, comprising a driving gear (11) and a driven gear (12), wherein the driving gear (11) is connected to a driving end of a driving motor (13) and is used to drive the driven gear (12) to rotate, and the driven gear (12) rotates to drive the electric skateboard to move, characterized in that: It also includes a secondary reduction gear (14), which is meshedly connected with the driving gear (11) and the driven gear (12) respectively.

2. A reduction transmission mechanism according to claim 1, characterized in that: The secondary reduction gear (14) comprises a first gear unit (141) and a second gear unit (142); the first gear unit (141) is meshedly connected to the driving gear (11); and the second gear unit (142) is meshedly connected to the driven gear (12).

3. A reduction transmission mechanism according to claim 2, characterized in that: The second gear unit (142) is disposed on one side of the first gear unit (141) and rotates coaxially with the first gear unit (141).

4. A reduction transmission mechanism according to claim 2, characterized in that: The number of gear teeth of the first gear unit (141) is greater than the number of gear teeth of the second gear unit (142).

5. A reduction transmission mechanism according to claim 2, characterized in that: The outer diameter of the first gear unit (141) is greater than the outer diameter of the second gear unit (142).

6. A reduction transmission mechanism according to claim 1, characterized in that: The number of teeth of the driven gear (12) is greater than the number of teeth of the driving gear (11).

7. A reduction transmission mechanism according to claim 1, characterized in that: The outer diameter of the driven gear (12) is greater than the outer diameter of the driving gear (11).

8. A reduction gearbox, characterized in that: It comprises a reduction transmission mechanism as claimed in any one of the preceding claims.

9. An electric skateboard, characterized in that: A reduction gear box comprising the reduction gear box as claimed in claim 8.

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