CN-122029369-A - Eccentric swing type gear device

Abstract

The eccentric oscillation gear device (100) is provided with eccentric bodies (31, 32), a 1 st external gear (14) and a 2 nd external gear (15) that oscillate by a prescribed amount of eccentricity through the eccentric bodies (31, 32), a carrier (35) that is provided on the opposite side of the 1 st external gear (14) from the 2 nd external gear (15) in the axial direction, and a plurality of internal pins (48) that are integrated by the carrier (35) and that penetrate the 1 st external gear (14) and the 2 nd external gear (15). In the eccentric swing gear device (100), the eccentric amount of a 2 nd eccentric body (32) corresponding to a 2 nd external gear (15) is larger than the eccentric amount of a 1 st eccentric body (31) corresponding to a 1 st external gear (14).

Inventors

• Yamanaka Tanimurakunikoro

Assignees

• 住友重机械工业株式会社

Dates

Publication Date

20260512

Application Date

20241007

Priority Date

20231019

Claims (4)

1. 1. An eccentric oscillation type gear device is provided with an eccentric body, a1 st external gear and a2 nd external gear which oscillate by a prescribed eccentric amount through the eccentric body, a carrier which is provided on the opposite side of the 2 nd external gear with respect to the 1 st external gear in the axial direction, and a plurality of internal pins which are integrated by the carrier and penetrate the 1 st external gear and the 2 nd external gear, The eccentric amount of the 2 nd eccentric body corresponding to the 2 nd external gear is greater than the eccentric amount of the 1 st eccentric body corresponding to the 1 st external gear.
2. 2. The eccentric oscillating type gear device according to claim 1, wherein, The plurality of inner pins are cantilevered by the bracket.
3. 3. The eccentric oscillating gear apparatus as claimed in claim 1 or 2, wherein, The eccentric body has an eccentric part formed at the outer periphery of the shaft body, and an eccentric body bearing arranged at the outer periphery of the eccentric part, The eccentric amount of the eccentric part of the 2 nd eccentric body is larger than that of the eccentric part of the 1 st eccentric body.
4. 4. The eccentric oscillating type gear apparatus as claimed in any one of claims 1 to 3, wherein, The eccentric body has an eccentric part formed at the outer periphery of the shaft body, and an eccentric body bearing arranged at the outer periphery of the eccentric part, The diameter of the rolling element of the eccentric body bearing of the 2 nd eccentric body is larger than that of the rolling element of the eccentric body bearing of the 1 st eccentric body.

Description

Eccentric swing type gear device Technical Field The present disclosure relates to an eccentric oscillating gear device. Background A reduction gear is known which reduces the rotation input from an input shaft and outputs the reduced rotation. For example, patent document 1 discloses a reduction gear including an external gear, an internal gear, a plurality of carrier pins that internally rotates in carrier pin holes of the external gear, and a carrier having an output shaft that outputs rotation of a rotation component of the external gear via the carrier pins. In this device, the bracket has a support portion to which a plurality of bracket pins are coupled, and one end of each bracket pin is fixed to the support portion and is cantilever-supported by the support portion. Technical literature of the prior art Patent literature Patent document 1 Japanese patent application laid-open No. 2022-170831 Disclosure of Invention Technical problem to be solved by the invention The inventors have obtained the following new knowledge regarding an eccentric oscillating gear device. In the reduction gear described in patent document 1, the carrier pin is supported by a carrier cantilever on the output side. The bracket pin is closer to the root of the side of the bracket that supports it than the end of the side that is farther from the bracket. Therefore, the output torque generated by the carrier cannot be uniformly shared between the output side external gear close to the carrier and the input side external gear far from the carrier, and it is considered that the influence exerted by the respective external gear sliding portions is uneven. Based on the above-described knowledge, the inventors believe that it is important to further improve the structure related to the influence of the load from the output side on the gear in the reduction gear described in patent document 1. The present disclosure has been made in view of the above-described problems, and an object thereof is to provide an eccentric oscillating gear device capable of improving an influence of a load from an output side on a sliding portion of a gear. Means for solving the technical problems In order to solve the above problems, an eccentric oscillating gear device according to one embodiment of the present disclosure includes an eccentric body, a1 st external gear and a 2 nd external gear oscillating by a predetermined eccentric amount through the eccentric body, a carrier provided on the opposite side of the 1 st external gear with respect to the 2 nd external gear in the axial direction, and a plurality of inner pins integrated by the carrier and penetrating the 1 st external gear and the 2 nd external gear. In this eccentric oscillating gear device, the amount of eccentricity of the 2 nd eccentric body corresponding to the 2 nd external gear is larger than the amount of eccentricity of the 1 st eccentric body corresponding to the 1 st external gear. Any combination of the above components or a scheme in which the components or expression of the present disclosure are replaced with each other between methods, systems, and the like is also effective as an embodiment of the present disclosure. Effects of the invention According to the present disclosure, an eccentric oscillating gear device capable of improving the influence of a load from an output side on a sliding portion of a gear can be provided. Drawings Fig. 1 is a side sectional view schematically showing an eccentric oscillating gear device according to an embodiment. Fig. 2 is a front view schematically showing the eccentric oscillating gear apparatus of fig. 1. Fig. 3 is a sectional view showing the periphery of an eccentric body of the eccentric oscillating gear apparatus of fig. 1 in an enlarged manner. Detailed Description The present disclosure will be described below based on preferred embodiments with reference to the accompanying drawings. In the embodiment and the modification, the same or equivalent constituent elements and components are denoted by the same reference numerals, and overlapping description thereof is omitted as appropriate. Also, in the drawings, the sizes of the illustrated components are appropriately enlarged or reduced for the convenience of understanding. In the drawings, parts not essential to the description of the embodiments are omitted. The terms including ordinal numbers 1 and 2 are used to describe various components, but the terms are used only for the purpose of distinguishing one component from other components, and are not limited to the components. Embodiment(s) First, an overall configuration of an eccentric oscillating gear device 100 (hereinafter, sometimes referred to as "gear device 100") according to an embodiment will be described with reference to fig. 1 to 3. Fig. 1 is a side cross-sectional view showing an example of a gear device 100. Fig. 2 is a front view of the gear device 100, showing the internal structure thereof in a manner to