Dual output differential speed reducer

Abstract

The utility model provides a kind of double output differential reducer, it is related to the technical field of speed reducer, comprising: input shaft;Transmission flange, it is connected to the input shaft by first bearing drive;Planetary transmission subassembly, it is connected with the input shaft, the planetary transmission subassembly includes sun gear, multiple planetary gears and output shaft, the sun gear and the input shaft are connected, with the transmission flange is engaged drive by multiple planetary gears.This utility model has the beneficial effect: on the basis of common gear ring and flange integrated inner tooth engagement increase a kind of outer engagement function, if fixed output flange, its inner tooth realizes normal planetary gear train in internal engagement, output shaft speed ratio is X;If fixed output shaft, then outer tooth can realize and outer gear in external engagement, output flange speed ratio is X-1, to obtain differential ratio, compared with traditional differential ratio by two speed reducers can be saved in space while saving cost, with high performance-price ratio characteristics.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, and in particular to a dual-output differential speed reducer. Background Technology

[0002] In industrial production and various mechanical transmission scenarios, speed reducers play a crucial role as key power transmission components. Common speed reducers mainly include two typical structural forms: one with a fixed outer ring, allowing the planetary carrier to rotate; the other with a fixed planetary carrier, allowing the outer ring to rotate to complete power transmission and speed regulation. Both structural forms can meet certain basic transmission requirements and are widely used in the market.

[0003] However, existing single-speed-ratio reducers have many limitations, causing numerous inconveniences in practical applications. Firstly, when a speed ratio differential mode is required, companies often face a dilemma: one is to purchase two reducers with different speed ratios, which undoubtedly increases equipment procurement costs and subsequent maintenance and management costs; the other is to frequently disassemble the motor to replace the corresponding reducer, which is cumbersome, increases the risk of equipment failure, and affects production efficiency; or to add another motor to match different reducers to achieve the speed ratio differential, which not only creates equipment redundancy but also further increases costs, including equipment purchase, installation space, and energy consumption. Therefore, a reducer capable of achieving two speed ratios is needed to solve the aforementioned technical problems. Utility Model Content

[0004] In view of this, the embodiments of this utility model provide a dual-output differential speed reducer to solve the technical problem that common speed reducers in the prior art can only achieve one speed ratio and cannot achieve dual-speed ratios at both ends.

[0005] An embodiment of this utility model provides a dual-output differential speed reducer, comprising:

[0006] Input axis;

[0007] A transmission flange is connected to the input shaft via a first bearing. The inner wall of the transmission flange is provided with an internal gear ring, and the outer wall is provided with an external gear ring.

[0008] A planetary transmission assembly is connected to the input shaft. The planetary transmission assembly includes a sun gear, multiple planet gears, and an output shaft. The sun gear is connected to the input shaft and drives the transmission flange through the multiple planet gears. Each planet gear is rotatably connected to the output shaft and meshes with the tooth profile of the internal gear ring of the transmission flange.

[0009] An external gear meshes with the external gear ring of the transmission flange. The external gear and the output shaft serve as the two ends of the reducer. By fixing either the external gear or the output shaft, one speed ratio can be output with the other end as the output end, thus generating two speed ratios.

[0010] Furthermore, the transmission flange includes an input flange and an output flange, which are axially connected by screws.

[0011] Furthermore, the inner ring of the first bearing is connected to the input shaft, and the outer ring of the first bearing is connected to the input flange.

[0012] Furthermore, a second bearing is provided between the output flange and the output shaft, and both the first bearing and the second bearing are provided with seals to prevent grease leakage.

[0013] Furthermore, the end of the output shaft facing the input shaft is flange-shaped, and the planetary gears are arranged circumferentially on the flange end of the output shaft via pins.

[0014] Furthermore, the output shaft is provided with a keyway for keyed connection.

[0015] Furthermore, the input shaft and the output shaft are provided with a protective cover structure, which includes an input end protective cover, an output end protective cover and an intermediate protective cover, and the intermediate protective cover is connected to the input end protective cover and the output end protective cover.

[0016] Furthermore, a connecting bearing is provided between the input end protective cover and the input shaft, as well as between the output end protective cover and the output shaft.

[0017] Furthermore, the intermediate protective cover is provided with an arc-shaped skylight to provide space for the external gear to mesh with the external gear ring.

[0018] Furthermore, the input protective cover is connected to the motor and is used to connect the reducer and the motor.

[0019] The beneficial effects of the technical solution provided by the embodiments of this utility model are as follows: The dual-output differential reducer of this utility model, by setting the output flange of the reducer to have internal and external teeth, compared with the conventional design method where the output flange does not have internal teeth and requires a separate internal gear ring for connection, this integrated form of the gear ring and flange greatly reduces the error caused by the two parts during processing or installation connection, and has the characteristics of high precision and compactness; on the basis of the common integrated gear ring and flange internal gear meshing, an external meshing function is added. If the output flange is fixed, its internal teeth achieve normal planetary gear train internal meshing, and the output shaft speed ratio is X; if the output shaft is fixed, the external teeth can achieve external meshing with the external gear, and the output flange speed ratio is X-1, thereby obtaining the differential ratio. Compared with the traditional method of achieving the differential ratio through two reducers, it can save space and cost, and has the characteristics of high cost performance. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the overall structure of the dual-output differential speed reducer of this utility model;

[0021] Figure 2 This is an enlarged view of the structure at point A in the dual-output differential speed reducer of this utility model.

[0022] In the diagram: 1. Input shaft; 2. Input flange; 3. First bearing; 4. Output flange; 5. Screw; 6. Sun gear; 7. Output shaft; 8. Planetary gears; 9. Pin; 10. External gear ring; 11. External gear; 12. Second bearing; 13. Input end protective cover; 14. Output end protective cover; 15. Intermediate protective cover; 16. Connecting bearing; 17. Seal; 100. Planetary transmission assembly; 200. Protective cover structure. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be further described below with reference to the accompanying drawings. The following description presents a preferred embodiment of several possible embodiments of this utility model, intended to provide a basic understanding of the utility model, but not intended to identify the key or decisive elements of the utility model or to limit the scope of protection sought.

[0024] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0025] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures. Also, it should be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale.

[0027] In the description of this utility model, it should be noted that the circuits, electronic components and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated. The content protected by this utility model does not involve any improvement to the internal structure and method.

[0028] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Please refer to Figure 1-2 The present invention provides a dual-output differential speed reducer, including an input shaft 1, a transmission flange, a planetary transmission assembly 100, and an external gear 11.

[0030] The transmission flange consists of an input flange 2 and an output flange 4, which are axially connected by screws 5. The inner ring of the first bearing 3 is connected to the input shaft 1, and the outer ring is connected to the input flange 2, thereby stably transmitting the power of the input shaft 1 to the input flange 2.

[0031] In this embodiment, the planetary transmission assembly 100 includes a sun gear 6, a plurality of planet gears 8 and an output shaft 7. One end of the input shaft 1 is used to connect to the drive shaft of the motor, and the other end is connected to the shank of the sun gear 6. The plurality of planet gears 8 are distributed around the sun gear 6 and mesh with the sun gear 6.

[0032] Specifically, the planetary gears 8 are arranged circumferentially on the flange end of the output shaft 7 via pins 9. The end of the output shaft 7 facing the input shaft 1 is flange-shaped. This structure allows the planetary gears 8 to be stably mounted on the output shaft 7 and to drive the output shaft 7 to rotate as the planetary gears 8 rotate.

[0033] In one specific embodiment, four planetary gears 8 are selected, and four center holes are opened along the circumference on the flange end of the output shaft 7. The four planetary gears 8 are evenly distributed on the output shaft 7 through four pins 9 and small washers.

[0034] At the same time, the planetary gear 8 meshes with the transmission flange (i.e., the whole consisting of the input flange 2 and the output flange 4) to realize the transmission of power from the transmission flange to the planetary gear 8 and then to the output shaft 7, forming a speed ratio X. This speed ratio X depends on the number of internal gear rings of the planetary gear 8 and the output flange 4.

[0035] In this embodiment, the external gear 11 meshes with the external gear ring 10 of the transmission flange. The external gear ring 10 is located outside the output flange 4, so that the power is transmitted from the transmission flange to the external gear 11 to form another speed ratio X-1. This speed ratio depends on the number of gear rings of the external gear ring 10 and the external gear 11.

[0036] In practical implementation, when different speed ratios are required, it can be achieved by fixing one of the external gear 11 or the output shaft 7, and then using the other end as the output end. For example, when the external gear 11 is fixed, the power is transmitted to the planetary gear 8 through the transmission flange, and the planetary gear 8 drives the output shaft 7 to rotate. At this time, the output shaft 7 outputs a speed ratio X. When the output shaft 7 is fixed, the power is transmitted to the external gear 11 through the transmission flange, and the external gear 11 outputs another speed ratio X-1 as the output end.

[0037] To ensure the normal operation and service life of the reducer, a second bearing 12 is provided between the output flange 4 and the output shaft 7. At the same time, both the first bearing 3 and the second bearing 12 are provided with seals 17 to effectively prevent grease leakage and ensure internal lubrication.

[0038] Specifically, both the first bearing 3 and the second bearing 12 are ball bearings with sealing properties, which can seal grease.

[0039] In an optional embodiment, the input shaft 1 and the output shaft 7 are provided with a protective cover structure 200, including an input end protective cover 13, an output end protective cover 14 and an intermediate protective cover 15. The intermediate protective cover 15 is locked to the input end protective cover 13 and the output end protective cover 14 by ten bolts, which can achieve the protection functions of dust prevention, corrosion prevention and rust prevention.

[0040] Connecting bearings 16 are provided between the input end protective cover 13 and the input shaft 1, and between the output end protective cover 14 and the output shaft 7, so that the protective cover structure 200 can remain relatively stable when the shaft rotates and reduce friction.

[0041] An arc-shaped skylight is provided on the middle protective cover 15. The arc-shaped skylight is 80° open. The arc-shaped skylight provides the necessary space for the meshing of the external gear 11 and the external gear ring 10. At the same time, the input protective cover (referring to the input end protective cover 13) is connected to the motor, which facilitates the docking of the reducer and the motor and enhances the stability between the motor and the reducer.

[0042] The working principle of the above embodiments is as follows:

[0043] When the reducer is working, the fixed output flange 4 is driven by the motor to rotate the input shaft 1. The input shaft 1 drives the sun gear 6 fixed to it to rotate. The sun gear 6 meshes with multiple planet gears 8 for transmission. The multiple planet gears 8 simultaneously mesh with the internal teeth of the output flange 4. At this time, the planet gears 8 rotate outside the pin shaft 9 and drive the output shaft 7 to rotate. The speed ratio of the output shaft 7 is X. The fixed output shaft 7 is driven by the motor to rotate the input shaft 1. The input shaft 1 drives the sun gear 6 fixed to it to rotate. The sun gear 6 meshes with multiple planet gears 8 for transmission. The multiple planet gears 8 simultaneously mesh with the internal teeth of the output flange 4. At this time, the planet gears 8 rotate outside the pin shaft 9, thereby driving the output flange 4 to rotate. The output flange 4 meshes with the external gear ring 10 and the external gear 11, driving the external gear 11 to rotate. The external gear 11 outputs a speed ratio of X-1, forming a differential speed ratio.

[0044] In this document, the directional terms such as front, back, top, and bottom are defined based on the position of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that these are relative concepts and can vary depending on different methods of use and placement; the use of these directional terms should not limit the scope of protection claimed in this application.

[0045] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-output differential speed reducer, characterized in that, include: Input axis (1); A transmission flange is connected to the input shaft (1) via a first bearing (3). The inner wall of the transmission flange is provided with an inner gear ring (18), and the outer wall is provided with an outer gear ring (10). A planetary transmission assembly (100) is connected to the input shaft (1). The planetary transmission assembly (100) includes a sun gear (6), a plurality of planet gears (8), and an output shaft (7). The sun gear (6) is connected to the input shaft (1) and is driven by the transmission flange through the plurality of planet gears (8). Each planet gear (8) is rotatably connected to the output shaft (7) and meshes with the tooth profile of the internal gear ring (18) of the transmission flange. An external gear (11) meshes with the tooth profile of the external gear ring (10) of the transmission flange. The external gear (11) and the output shaft (7) serve as the two ends of the reducer. By fixing one of the external gear (11) or the output shaft (7), the other end can be used as the output end to output a speed ratio, thereby generating two speed ratios.

2. The dual-output differential speed reducer as described in claim 1, characterized in that: The transmission flange includes an input flange (2) and an output flange (4), which are axially connected by screws (5).

3. The dual-output differential speed reducer as described in claim 2, characterized in that: The inner ring of the first bearing (3) is connected to the input shaft (1), and the outer ring of the first bearing (3) is connected to the input flange (2).

4. The dual-output differential speed reducer as described in claim 3, characterized in that: A second bearing (12) is provided between the output flange (4) and the output shaft (7). Both the first bearing (3) and the second bearing (12) are provided with seals (17) to prevent grease leakage.

5. The dual-output differential speed reducer as described in claim 1, characterized in that: The output shaft (7) is flange-shaped at one end facing the input shaft (1), and the planetary gears (8) are arranged circumferentially at the flange end of the output shaft (7) via pins (9).

6. The dual-output differential speed reducer as described in claim 2, characterized in that: The output shaft (7) is provided with a keyway for key connection.

7. The dual-output differential speed reducer as described in claim 1, characterized in that: The input shaft (1) and the output shaft (7) are provided with a protective cover structure (200). The protective cover structure (200) includes an input end protective cover (13), an output end protective cover (14) and an intermediate protective cover (15). The intermediate protective cover (15) is connected to the input end protective cover (13) and the output end protective cover (14).

8. The dual-output differential speed reducer as described in claim 7, characterized in that: A connecting bearing (16) is provided between the input end protective cover (13) and the input shaft (1), as well as between the output end protective cover (14) and the output shaft (7).

9. The dual-output differential speed reducer as described in claim 7, characterized in that: The intermediate protective cover (15) has an arc-shaped skylight to provide space for the external gear (11) to mesh with the external gear ring (10).

10. The dual-output differential speed reducer as described in claim 7, characterized in that: The input end protective cover (13) is connected to the motor and is used to connect the reducer and the motor.

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