Single-input double-output reducing mechanism and planetary gear box

Abstract

The invention provides a single-input and double-output speed reducing mechanism and a planetary gearbox, and the single-input and double-output speed reducing mechanism comprises an input shaft, a first output shaft and a second output shaft; the input shaft is used for being driven to drive the first output shaft to rotate forwards through the first transmission mechanism and to drive the second output shaft to rotate backwards through the second transmission mechanism. According to the technical scheme, the input shaft is matched with the first transmission mechanism and the second transmission mechanism, output of the first output shaft and the second output shaft in the opposite directions can be achieved, and therefore the double-output device can be applied to some application occasions needing double output in the opposite directions, such as the occasion where two independent driving wheels are driven to rotate in the opposite directions. In addition, due to the fact that the efficiency of the planetary gearbox is high, the design is very effective in the aspects of power transmission and energy conservation.

Description

Technical Field

[0001] The present invention belongs to the technical field of speed reducers, and in particular relates to a single-input dual-output speed reduction mechanism and a planetary gearbox. Background Art

[0002] Existing planetary gearboxes typically implement a single-input, single-output transmission scheme, or a single-input, dual-output (same direction) transmission scheme. However, in some applications, dual outputs in opposite directions are required, such as driving two independent drive wheels. Therefore, it is necessary to develop a planetary gearbox with a single-input, dual-output transmission scheme in opposite directions. Summary of the Invention

[0003] Therefore, the present invention provides a single-input dual-output reduction mechanism and a planetary gearbox, the main technical problem to be solved is: how to achieve dual-output reduction transmission in opposite directions.

[0004] In order to solve the above problems, the present invention provides a single-input dual-output speed reduction mechanism, which includes an input shaft, a first output shaft and a second output shaft;

[0005] The input shaft is used to be driven to drive the first output shaft to rotate forward through the first transmission mechanism, and to drive the second output shaft to rotate reversely through the second transmission mechanism.

[0006] In some embodiments, the first output shaft and the second output shaft are configured to rotate synchronously driven by the input shaft.

[0007] In some embodiments, the axes of the first output shaft and the second output shaft coincide with each other.

[0008] In some embodiments, the first output shaft and the second output shaft both rotate at the same speed.

[0009] In some embodiments, the first transmission mechanism includes a first sun gear, a first planetary gear, and a first ring gear; the input shaft is used to drive the first sun gear to rotate, and the input shaft is connected to the first transmission mechanism through the first sun gear;

[0010] Among them, the first planetary gear is engaged between the first sun gear and the first inner ring gear, and the first sun gear drives the first inner ring gear to rotate through the first planetary gear; the first output shaft is connected to the first inner ring gear to rotate forward under the drive of the first inner ring gear.

[0011] In some embodiments, the first output shaft is fixedly connected to the first inner gear ring, and the axes of the two coincide with each other.

[0012] In some embodiments, the second transmission mechanism includes a second sun gear, second planetary gears, a second inner ring gear, and an output planet carrier, the input shaft is used to drive the second sun gear to rotate, and the input shaft is connected to the second transmission mechanism through the second sun gear;

[0013] The second planetary gear has an axle, and the second planetary gear is rotatably arranged on the output planetary carrier via the axle; the second inner ring gear is a fixed component, and the second planetary gear is meshed between the second sun gear and the second inner ring gear. When the second sun gear rotates, it drives the second planetary gear to revolve around the axis of the second sun gear, so that the second planetary gear drives the output planetary carrier to rotate via the axle;

[0014] The second output shaft is connected to the output planet carrier to rotate reversely under the drive of the output planet carrier.

[0015] In some embodiments, the second output shaft is fixedly connected to the output planet carrier.

[0016] In some embodiments, when the first transmission mechanism includes a first sun gear, the first sun gear and the second sun gear are different shaft segments of the same sun gear, and are both integrally formed on the input shaft.

[0017] The present invention also provides a planetary gearbox comprising any one of the single-input and dual-output reduction mechanisms described above.

[0018] The single-input dual-output reduction mechanism and planetary gearbox provided by the present invention have the following beneficial effects:

[0019] 1. The input shaft cooperates with the first and second transmission mechanisms to achieve opposite-direction outputs from the first and second output shafts. This allows for applications requiring dual outputs in opposite directions, such as driving two independent drive wheels in opposite directions. Furthermore, due to the high efficiency of planetary gearboxes, this design is highly effective in terms of power transmission and energy conservation.

[0020] 2. The first planetary gears and the first internal gear ring are both rotating parts. The input shaft drives the first sun gear to rotate, the first sun gear drives the first planetary gears to rotate, the first planetary gears drive the first internal gear ring to rotate, and the first internal gear ring drives the first output shaft to rotate, and the first output shaft rotates forward.

[0021] 3. The second inner ring gear is a fixed part. Under the action of the second inner ring gear, when the second sun gear rotates, it drives the second planetary gears to revolve around the axis of the second sun gear. When the second planetary gears revolve around the axis of the second sun gear, they drive the output planetary carrier to rotate through the wheel axle, and the output planetary carrier drives the second output shaft to reverse. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. The drawings described below are merely exemplary. Those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0023] Figure 1 It is a structural schematic diagram of the planetary gearbox of the present invention;

[0024] Figure 2 This is a schematic structural diagram of the planetary gearbox of the present invention from another perspective;

[0025] Figure 3 is a cross-sectional view of the planetary gearbox of the present invention;

[0026] Figure 4 is a schematic diagram reflecting the first transmission mechanism;

[0027] Figure 5 It is a schematic diagram reflecting the second transmission mechanism.

[0028] The accompanying drawings are:

[0029] 1. Fixed seat; 2. Housing; 3. Input shaft; 4. First output shaft; 5. Second output shaft; 6. First sun gear; 7. First planetary gears; 8. First inner ring gear; 9. Second sun gear; 10. Second planetary gears; 11. Second inner ring gear; 12. Output planet carrier; 13. Planet mounting frame; 41. Annular flange; 101. Axle. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0032] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0033] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0034] See also Figure 1-5 As shown, according to an embodiment of the present invention, a single-input dual-output reduction mechanism is provided, which includes an input shaft 3, a first output shaft 4, and a second output shaft 5. The input shaft 3 is driven to drive the first output shaft 4 to rotate forward through a first transmission mechanism, and to drive the second output shaft 5 to rotate counterclockwise through a second transmission mechanism.

[0035] In the above example, the input shaft 3 cooperates with the first transmission mechanism and the second transmission mechanism to realize output in opposite directions of the first output shaft 4 and the second output shaft 5, so that it can be used in certain applications that require dual output in opposite directions, such as driving two independent drive wheels to rotate in opposite directions.

[0036] It should be noted that the aforementioned forward rotation can refer to either clockwise or counterclockwise rotation. When forward rotation refers to clockwise rotation, counterclockwise rotation is equivalent to counterclockwise rotation. Similarly, when forward rotation refers to counterclockwise rotation, counterclockwise rotation is equivalent to clockwise rotation. In short, the first output shaft 4 and the second output shaft 5 rotate in opposite directions.

[0037] In some embodiments, the first output shaft 4 and the second output shaft 5 are configured to rotate synchronously with the input shaft 3. The axes of the first output shaft 4 and the second output shaft 5 may coincide to accommodate certain applications requiring coaxial transmission. The first output shaft 4 and the second output shaft 5 may have the same rotational speed.

[0038] In order to realize the function of the aforementioned first transmission mechanism, as Figure 3 and Figure 4 As shown, the aforementioned first transmission mechanism may include a first sun gear 6, first planetary gears 7, and a first internal gear ring 8. The aforementioned input shaft 3 is used to drive the first sun gear 6 to rotate, and the input shaft 3 is connected to the first transmission mechanism via the first sun gear 6. It should be noted that the first sun gear 6, the first planetary gears 7, and the first internal gear ring 8 are each capable of rotating.

[0039] The first planetary gears 7 are meshed between the first sun gear 6 and the first inner ring gear 8. The first sun gear 6 drives the first inner ring gear 8 to rotate via the first planetary gears 7. The first output shaft 4 is connected to the first inner ring gear 8 to rotate forwardly under the drive of the first inner ring gear 8.

[0040] In the above example, the first planetary gear 7 and the first inner ring gear 8 are both rotating parts. The input shaft 3 drives the first sun gear 6 to rotate, the first sun gear 6 drives the first planetary gear 7 to rotate, the first planetary gear 7 drives the first inner ring gear 8 to rotate, the first inner ring gear 8 drives the first output shaft 4 to rotate, and the first output shaft 4 rotates in the positive direction.

[0041] It should be noted here that: Figure 3 As shown, the aforementioned single-input, dual-output reduction mechanism may include a fixed base 1 and a planetary mounting frame 13. The aforementioned first planetary gear 7 is rotatably mounted on the planetary mounting frame 13, and the planetary mounting frame 13 is fixed to the fixed base 1. A housing 2 is provided on the fixed base 1, and the aforementioned first inner ring gear 8 is rotatably disposed within the housing 2. The housing 2 provides protection for the first inner ring gear 8. The first inner ring gear 8 may be rotatably mounted on the fixed base 1 via a bearing.

[0042] like Figure 4As shown, the number of the first planetary gears 7 can be more than two, and the first planetary gears 7 can be evenly distributed circumferentially around the axis of the first sun gear 6. This can improve the transmission stability between the first sun gear 6 and the first inner ring gear 8. In a specific application example, the number of the first planetary gears 7 can be three.

[0043] In some embodiments, as Figure 3 As shown, the aforementioned first output shaft 4 is fixedly connected to the first inner gear ring 8, and their axes coincide. Specifically, an annular flange 41 may be provided at one end of the first output shaft 4. This annular flange 41 is used to securely connect the first output shaft 4 to one end of the first inner gear ring 8, allowing the first inner gear ring 8 to drive the first output shaft 4 in rotation via the annular flange 41.

[0044] In order to realize the function of the aforementioned second transmission mechanism, as Figure 3 and Figure 5 As shown, the aforementioned second transmission mechanism may include a second sun gear 9, second planetary gears 10, a second inner ring gear 11 and an output planetary carrier 12. The input shaft 3 is used to drive the second sun gear 9 to rotate, and the input shaft 3 is connected to the second transmission mechanism through the second sun gear 9. Among them, the second planetary gear 10 has an axle 101, and the second planetary gear 10 is rotatably arranged on the output planetary carrier 12 through the axle 101. The second planetary gear 10 can rotate on the output planetary carrier 12 through the axle 101. The second inner ring gear 11 is a fixed component, and the second inner ring gear 11 can be fixed on the aforementioned fixed seat 1. Specifically, the second inner ring gear 11 can be fixed on the aforementioned planetary mounting frame 13. The second inner ring gear 11 is kept relatively fixed with the aforementioned fixed seat 1 through the planetary mounting frame 13.

[0045] The aforementioned second planetary gears 10 mesh between the second sun gear 9 and the second internal ring gear 11. When the second sun gear 9 rotates, it drives the second planetary gears 10 to revolve around the axis of the second sun gear 9, causing the second planetary gears 10 to rotate the output planetary carrier 12 via the axle 101. The aforementioned second output shaft 5 is connected to the output planetary carrier 12 so that it can rotate reversely when driven by the output planetary carrier 12.

[0046] In the above example, the second inner ring gear 11 is a fixed part. Under the action of the second inner ring gear 11, when the second sun gear 9 rotates, it drives the second planetary gear 10 to revolve around the axis of the second sun gear 9. When the second planetary gear 10 revolves around the axis of the second sun gear 9, it drives the output planetary carrier 12 to rotate through the axle 101, and the output planetary carrier 12 drives the second output shaft 5 to reverse.

[0047] like Figure 3 and Figure 5As shown, one end of the axle 101 of the second planetary gear 10 is mounted on the output planetary carrier 12, and the second planetary gear 10 can rotate on the output planetary carrier 12 via its axle 101. The other end of the axle 101 of the second planetary gear 10 can be supported on the aforementioned planetary mounting frame 13, with the other end of the axle 101 of the second planetary gear 10 slidingly engaged with the planetary mounting frame 13. The planetary mounting frame 13 provides support for the second planetary gear 10 and the output planetary carrier 12 via the axle 101 of the second planetary gear 10.

[0048] In some embodiments, as Figure 3 and Figure 5 As shown, the second output shaft 5 is fixedly connected to the output planetary carrier 12. The axis of the second output shaft 5 coincides with the axis of the second sun gear 9. The number of the second planetary gears 10 can be two or more, and the second planetary gears 10 are evenly distributed around the axis of the second sun gear 9. In a specific application example, the number of the second planetary gears 10 is three.

[0049] When the first transmission mechanism includes the first sun gear 6, as shown in FIG. Figure 3 and Figure 5 As shown, the first sun gear 6 and the second sun gear 9 can be different shaft sections of the same sun gear, and are both integrally formed on the input shaft 3. This can improve the connection stability between the input shaft 3 and the first sun gear 6 and the second sun gear 9, making it easier for the input shaft 3 to drive the first sun gear 6 and the second sun gear 9 to rotate.

[0050] It should be noted that the axes of the aforementioned input shaft 3, first sun gear 6, and second sun gear 9 coincide. The aforementioned second output shaft 5 is sleeved within the inner bore of the first output shaft 4. A bearing may be provided between the inner bores of the second output shaft 5 and the first output shaft 4. The aforementioned second inner ring gear 11 is sleeved within the inner side of the first inner ring gear 8, making the overall structure more compact.

[0051] The present invention further provides a planetary gearbox, which may include any of the single-input, dual-output reduction mechanisms described above. Because the planetary gearbox utilizes the aforementioned single-input, dual-output reduction mechanism, the input shaft 3 cooperates with the first transmission mechanism and the second transmission mechanism to achieve opposite outputs from the first output shaft 4 and the second output shaft 5. This allows for application in certain applications requiring dual outputs in opposite directions, such as driving two independent drive wheels in opposite directions.

[0052] In order to realize the function of the above-mentioned single-input dual-output reduction mechanism, the internal design of the planetary gearbox needs to meet the following conditions:

[0053] a. The design of the first planetary gears 7 should allow them to rotate freely (autorotate) on the planetary mounting frame 13, while keeping the first planetary gears 7 engaged between the first sun gear 6 and the first inner ring gear 8, so that the first sun gear 6 can drive the first inner ring gear 8 to rotate via the first planetary gears 7.

[0054] b. The design of the output planet carriers 12 should ensure that they can rotate independently (rotate on their own) and have sufficient strength to withstand the force and torque from the second planetary gears 10.

[0055] c. The design of the first output shaft 4 and the second output shaft 5 should allow them to rotate independently and have sufficient rigidity to transmit torque to external mechanical components.

[0056] The advantage of this planetary gearbox is that it can distribute the power of a single input shaft 3 to two output shafts (i.e., the aforementioned first output shaft 4 and second output shaft 5), thereby achieving two independent mechanical functions. In addition, due to the high efficiency of planetary gearboxes, this design is also very effective in terms of power transmission and energy conservation.

[0057] It is easy for those skilled in the art to understand that, under the premise of no conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A single-input dual-output speed reduction mechanism, characterized in that: It comprises an input shaft (3), a first output shaft (4) and a second output shaft (5); The input shaft (3) is used to be driven to drive the first output shaft (4) to rotate forward through the first transmission mechanism, and to drive the second output shaft (5) to rotate reversely through the second transmission mechanism.

2. The single-input dual-output speed reduction mechanism according to claim 1, characterized in that: The first output shaft (4) and the second output shaft (5) are both used for synchronous rotation driven by the input shaft (3).

3. The single-input dual-output speed reduction mechanism according to claim 1, characterized in that: The axes of the first output shaft (4) and the second output shaft (5) coincide with each other.

4. The single-input dual-output speed reduction mechanism according to claim 1, characterized in that: The first output shaft (4) and the second output shaft (5) both have the same rotational speed.

5. The single-input dual-output speed reduction mechanism according to claim 1, characterized in that: The first transmission mechanism comprises a first sun gear (6), a first planetary gear (7) and a first inner ring gear (8); the input shaft (3) is used to drive the first sun gear (6) to rotate, and the input shaft (3) is connected to the first transmission mechanism through the first sun gear (6); The first planetary gear (7) is meshed between the first sun gear (6) and the first inner ring gear (8), and the first sun gear (6) drives the first inner ring gear (8) to rotate through the first planetary gear (7); the first output shaft (4) is connected to the first inner ring gear (8) to rotate forward under the drive of the first inner ring gear (8).

6. The single-input dual-output speed reduction mechanism according to claim 5, characterized in that: The first output shaft (4) is fixedly connected to the first inner gear ring (8), and the axes of the two coincide with each other.

7. The single-input dual-output speed reduction mechanism according to any one of claims 1 to 6, characterized in that: The second transmission mechanism comprises a second sun gear (9), a second planetary gear (10), a second inner ring gear (11) and an output planetary carrier (12); the input shaft (3) is used to drive the second sun gear (9) to rotate, and the input shaft (3) is connected to the second transmission mechanism through the second sun gear (9); The second planetary gear (10) has a wheel shaft (101), and the second planetary gear (10) is rotatably arranged on the output planetary carrier (12) through the wheel shaft (101); the second inner gear ring (11) is a fixed component, and the second planetary gear (10) is engaged between the second sun gear (9) and the second inner gear ring (11); the second sun gear (9) is used to drive the second planetary gear (10) to revolve around the axis of the second sun gear (9) when rotating, so that the second planetary gear (10) drives the output planetary carrier (12) to rotate through the wheel shaft (101); The second output shaft (5) is connected to the output planetary carrier (12) so as to be driven by the output planetary carrier (12) to rotate reversely.

8. The single-input dual-output speed reduction mechanism according to claim 7, characterized in that: The second output shaft (5) is fixedly connected to the output planet carrier (12).

9. The single-input dual-output speed reduction mechanism according to claim 7, characterized in that: When the first transmission mechanism includes a first sun gear (6), the first sun gear (6) and the second sun gear (9) are different shaft sections of the same sun gear and are both integrally formed on the input shaft (3).

10. A planetary gearbox, characterized in that: It comprises the single-input dual-output reduction mechanism according to any one of claims 1 to 9.

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