Planetary small-tooth-difference speed reducer
By designing a planetary reducer with a small tooth difference, the problems of complex planetary reducer design and easy damage to eccentric balance wheels are solved, achieving high precision, large transmission ratio, and simple structure, thus improving the overall performance of the reducer.
Patent Information
- Application Number
- CN202511283614.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-09
- Publication Date
- 2025-11-21
AI Technical Summary
Existing planetary reducers are complex in design, have high assembly requirements, are prone to damage to eccentric balance wheels, and are difficult to achieve large transmission ratios.
The planetary gear reducer with low tooth difference adopts a structure where the tooth difference between the internal gear ring A and the internal gear ring B is an integer equal to the number of planetary gears. The planetary gears serve as the power input, and the planetary carrier serves as the power output, which simplifies the design and assembly.
It achieves high-precision transmission, large transmission ratio, simple structure, easy manufacturing and assembly, and stable overall performance of the reducer.
Smart Images
Figure CN120991059A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of speed reducer, in particular to a planetary few-tooth-difference speed reducer. BACKGROUND
[0002] In order to achieve large transmission ratio, the common gear reducer needs to use multi-stage transmission, which inevitably makes the speed reducer structure heavy and large in size. The planetary reducer breaks through the limitation of fixed shaft transmission, and the planetary gear makes a revolution, which makes it easy to achieve small size and large reduction ratio. The few-tooth-difference reducer, as a special form of planetary reducer, uses the tooth difference between two internal gears to achieve large transmission ratio. For involute few-tooth-difference reducer, in order to avoid interference between the internal meshing tooth pairs, complex modification calculation is needed, and non-standard short-tooth gears are used. The design is complex, the assembly requirement is high, and a slight mistake in design or installation may cause interference between the addendum and dedendum fillets of the internal and external gears, involute interference of the internal gear pair, tooth profile overlap interference, and radial interference in processing and manufacturing, etc., and a part of the eccentric pendulum of the planetary reducer is easy to be damaged. SUMMARY
[0003] The purpose of the present application is to provide a planetary few-tooth-difference speed reducer, which solves the problems of complex design, high assembly requirement, and easy damage of eccentric pendulum.
[0004] To achieve the above purpose, the present application provides the following technical scheme: A planetary few-tooth-difference speed reducer, comprising a sun gear, a planet gear, a planet carrier, an inner ring A, and an inner ring B, wherein the speed reducer is provided with the sun gear in the middle, the outer side of the sun gear is provided with the planet gear which is externally meshed with the sun gear and the planet carrier which is externally meshed with the planet gear, the upper side of the planet gear is meshed with the inner ring A and the inner ring B, the lower side of the planet carrier is meshed with the inner ring A and the inner ring B, there is a tooth difference between the inner ring A and the inner ring B, and the outer side of the inner ring B is meshed with a bearing.
[0005] Further, the value of the tooth difference number of the inner ring A and the inner ring B / the number of planet gears is an integer.
[0006] Further, the planet gear is used as power input, and the planet carrier is used as power output.
[0007] The present application has the advantages that the whole speed reducer meets the same output torque and transmission ratio, has large transmission ratio, high transmission precision, long precision maintenance time, simple structure, and simple manufacturing and assembly compared with the existing planetary gear reducer.
[0008] The above description is only a summary of the technical scheme of the present application. In order to make the technical means of the present application more clearly understood and implemented according to the content of the description, the preferred embodiments of the present application are described in detail as follows with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS
[0009] Figure 1 The schematic diagram of the overall structure of an embodiment of the present application.
[0010] Figure 2 The schematic diagram of the transmission of an embodiment of the present application.
[0011] Reference signs: 1, sun gear; 2, planet gear; 3, planet carrier; 4, inner ring A; 5, inner ring B. DETAILED DESCRIPTION
[0012] The technical scheme of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.
[0013] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0014] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0015] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.
[0016] Please refer to Figure 1The planetary few-tooth difference speed reducer shown in a preferred embodiment of the application comprises a sun gear 1, a planet gear 2, a planet carrier 3, an inner gear A 4, and an inner gear B 5. The speed reducer is provided with the sun gear 1 in the middle, the planet gear 2 is provided outside the sun gear 1 and meshes with the planet gear 2, and the planet carrier 3 meshes with the planet gear 2 outside. The upper side of the planet gear 2 is provided with the inner gear A 4 and the inner gear B 5, and the lower side of the planet carrier 3 is provided with the inner gear A 4 and the inner gear B 5. There is a tooth difference between the inner gear A 4 and the inner gear B 5, and the outer side of the inner gear B 5 is provided with a bearing.
[0017] The number of tooth differences of the inner gear A 4 and the inner gear B 5 / the number of planet gears 2 is an integer.
[0018] The planet gear 2 is the power input, and the planet carrier 3 is the power output.
[0019] In summary, the application provides a planetary few-tooth difference speed reducer. The device makes the whole speed reducer meet the same output torque and transmission ratio, has a large transmission ratio, high transmission precision, long precision maintenance time, simple structure, and simple manufacturing and assembly.
[0020] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present application.
[0021] The above-described embodiments only express the implementation of the application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent. It should be noted that for ordinary skilled in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the patent of the present application should be subject to the appended claims.
Claims
1. A planetary reducer with low tooth difference, characterized in that, The reducer includes a sun gear (1), planet gears (2), a planet carrier (3), an internal gear ring A (4), and an internal gear ring B (5). The sun gear (1) is located in the middle of the reducer. The planet gear (2) and the planet carrier (3) are located on the outside of the sun gear (1) and mesh with the sun gear (1). The internal gear ring A (4) and the internal gear ring B (5) are meshed on the upper side of the planet gear (2). The internal gear ring A (4) and the internal gear ring B (5) are meshed on the lower side of the planet carrier (3). There is a tooth difference between the internal gear ring A (4) and the internal gear ring B (5). A bearing is meshed on the outside of the internal gear ring B (5).
2. The planetary low-tooth-difference reducer as described in claim 1, characterized in that, The difference in tooth length between the internal gear ring A (4) and the internal gear ring B (5) / the number of planetary gears (2) is an integer.
3. A planetary low-tooth-difference reducer as described in claim 1, characterized in that, The planetary gear (2) serves as the power input, and the planetary carrier (3) serves as the power output.