Planet wheel pin shaft fixing structure of planetary reducer

Abstract

The utility model discloses a planet gear pin shaft fixing structure of a planetary reducer, which comprises a planet carrier, a planet gear pin shaft is arranged on the planet carrier, a fixing groove is arranged on the planet gear pin shaft, a threaded hole is arranged on the planet carrier, a fastening screw is in threaded connection with the inside of the threaded hole, and the fastening screw is in threaded connection with the fixing groove. The end face of the fastening screw stretches into the fixing groove and makes contact with the bottom face of the fixing groove, the fastening screw stretches into the outer circumferential face of the fixing groove and makes contact with the inner wall of the fixing groove, axial and circumferential wriggling and moving generated after the planet wheel pin shaft is stressed can be effectively prevented, and fixing reliability and stability are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of speed reducer, more specifically relates to a planetary gear reducer's planetary gear pin shaft fixed structure. BACKGROUND

[0002] The planetary gear reducer is widely used in industrial field, and the fixing mode of the planetary gear pin shaft is one of the key technologies, currently common fixing mode is that the planetary gear pin shaft is in interference or transition fit with the planet carrier, and riveting pin shaft or elastic pin shaft is simultaneously used to prevent the axial movement and circumferential rotation of the pin shaft.

[0003] However, riveting mode is easy to cause the pin shaft to produce micro deformation, influence the form tolerance, and the riveting size is difficult to control, and the cleanliness is poor, the elastic pin fixing can prevent movement, but the installation process also has the cleanliness problem, and the installation quality is difficult to control, if quality and cleanliness are to be ensured, the elastic pin installation equipment cost is higher. UTILITY MODEL CONTENTS

[0004] In view of the defects of the prior art, the utility model provides a planetary gear reducer's planetary gear pin shaft fixed structure, and the fixing effect of the planetary gear pin shaft is good.

[0005] To achieve the above object, the utility model provides the following technical scheme: a planetary gear reducer's planetary gear pin shaft fixed structure, including planet carrier, the planet carrier is provided with planetary gear pin shaft, the planetary gear pin shaft is provided with fixed slot, the planet carrier is provided with screw hole, the screw hole is connected with the fastening screw in screw thread, the end surface of fastening screw stretches into fixed slot, and the bottom surface of fixed slot is contacted, the outer circumferential surface of fastening screw that stretches into fixed slot is contacted with the inner wall of fixed slot.

[0006] Further, the fixed slot is a strip slot, and the bottom surface is a plane.

[0007] Further, the fastening screw is coated with thread glue on the screw thread.

[0008] Further, the fastening screw is provided with a plurality of in the circumferential direction of planetary gear pin shaft.

[0009] Further, the fastening screw is provided with an internal hexagonal groove at one end.

[0010] Further, the surface of the planet carrier is provided with a counterbore corresponding to the screw hole.

[0011] Compared with the prior art, the planet wheel pin shaft is fixed in the form of the fastening screw and the thread locking glue, axial and circumferential creep and movement of the planet wheel pin shaft after force is effectively prevented, the fixing reliability and stability are improved, the fixing quality and consistency of the fixing mode are good, the cleanliness is easy to control, the cleanliness problems of the riveted pin shaft and the elastic pin shaft in the prior art are avoided, the equipment cost is low, no additional limiting assembly and load sharing structure are needed, the manufacturing cost is reduced, the structure is simple, the installation is convenient, and the assembly and maintenance of the planetary reducer are facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is an appearance structure schematic view of a planet carrier in the planetary reducer of the utility model;

[0013] Figure 2 It is an appearance structure schematic view of a planet carrier in the planetary reducer of the utility model; Figure 1 It is an A-A direction section view schematic view in the utility model;

[0014] Figure 3 It is a structure schematic view of a planet wheel pin shaft in the planet wheel pin shaft fixing structure of the planetary reducer of the utility model;

[0015] Figure 4 It is a structure schematic view of a fastening screw in the planet wheel pin shaft fixing structure of the planetary reducer of the utility model.

[0016] The planet carrier 1, the planet wheel pin shaft 2, the fixing groove 3, the threaded hole 4, the fastening screw 5, the counterbore 6 and the mounting hole 7. DETAILED DESCRIPTION

[0017] In the description of the utility model, it needs to be explained that for the orientation words, if the terms "center", "transverse (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, and cannot be understood as limiting the specific protection scope of the utility model.

[0018] In addition, if the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the "first", "second" features can be explicitly or implicitly included one or more features, and the meaning of "several", "several" in the description of the utility model is two or more than two, unless otherwise explicitly specified.

[0019] Referring to Figures 1 to 4 Further described in the utility model.

[0020] A planet wheel pin shaft fixing structure of a planetary reducer, comprising a planet carrier 1, a planet wheel pin shaft 2 is arranged on the planet carrier 1, a fixing groove 3 is arranged on the planet wheel pin shaft 2, a threaded hole 4 is arranged on the planet carrier 1, a fastening screw 5 is threadedly connected in the threaded hole 4, the end face of the fastening screw 5 extends into the fixing groove 3 and is in contact with the bottom face of the fixing groove 3, and the outer circumferential face of the fastening screw 5 extending into the fixing groove 3 is in contact with the inner wall of the fixing groove 3.

[0021] Specifically, the planet wheel pin shaft 2 is in transition fit with the mounting hole 7 on the planet carrier 1.

[0022] Specifically, when the threaded hole 4 and the fixing groove 3 are machined, the installation position and angle of the fastening screw 5 can be determined through CAE analysis in advance, so as to further improve the anti-loosening capability of the fastening screw 5.

[0023] As shown in the figure, preferably in the present example, the fixing groove 3 is a strip-shaped groove, and the bottom face is a plane. Figure 3

[0024] Preferably in the present example, the thread of the fastening screw 5 is coated with thread glue, the thread glue is applied on the thread of the fastening screw 5 before the fastening screw 5 is screwed into the threaded hole 4, so as to improve the anti-loosening capability of the fastening screw 5.

[0025] Preferably in the present example, a plurality of fastening screws 5 are arranged in the circumferential direction of the planet wheel pin shaft 2.

[0026] Specifically, the angle and position of the plurality of fastening screws 5 are determined through CAE analysis.

[0027] As shown in the figure, preferably in the present example, one end of the fastening screw 5 is provided with an internal hexagonal groove, so that the fastening screw 5 is completely immersed in the threaded hole 4. Figure 4

[0028] As shown in the figure, preferably in the present example, a counter-bore 6 corresponding to the threaded hole 4 is arranged on the surface of the planet carrier 1. Figure 2

[0029] As shown in the figure, preferably in the present example, a counter-bore 6 corresponding to the threaded hole 4 is arranged on the surface of the planet carrier 1. Figures 1 to 4 ​​​As shown, the planet wheel pin shaft 2 is fixed in the form of fastening screw 5 and thread locking glue, which can effectively prevent the planet wheel pin shaft 2 from producing axial, circumferential creep and movement after force, improve the reliability and stability of the fixation, the fixation quality and consistency of the fixation mode are good, and the cleanliness is easy to control, avoiding the cleanliness problem existing in the riveting pin shaft and elastic pin shaft in the prior art; the fixation mode has low equipment cost, without additional limiting components and uniform load structure, reducing the manufacturing cost; the fixation mode has simple structure and is convenient to install, which is beneficial to the assembly and maintenance of the planetary reducer.

[0030] The preferred embodiments of the present application are described above, the protection scope of the present application is not limited to the above-mentioned embodiments, any technical solutions falling within the idea of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled in the art, some improvements and refinements without departing from the principles of the present application, these improvements and refinements shall be considered as the protection scope of the present application.

Claims

1. A planetary gear pin shaft fixing structure of a planetary reducer, characterized by: The planet carrier is provided with planet wheel pin shafts, the planet wheel pin shafts are provided with fixing grooves, the planet carrier is provided with threaded holes, the threaded holes are threadedly connected with fastening screws, the end surface of the fastening screw extends into the fixing groove and is in contact with the bottom surface of the fixing groove, and the outer circumferential surface of the fastening screw extending into the fixing groove is in contact with the inner wall of the fixing groove.

2. The planetary gear pin shaft fixing structure of the planetary decelerator according to claim 1, characterized by: The fixing groove is a strip-shaped groove, and the bottom surface is a plane.

3. The planetary gear pin shaft fixing structure of the planetary decelerator according to claim 1, characterized by: Threaded glue is coated on the thread of the fastening screw.

4. The planetary gear pin shaft fixing structure of the planetary decelerator according to claim 1, characterized by: A plurality of fastening screws are arranged in the circumferential direction of the planet wheel pin shaft.

5. The planetary gear pin shaft fixing structure of the planetary decelerator according to claim 1, characterized by: One end of the fastening screw is provided with an internal hexagonal groove.

6. The planetary gear pin shaft fixing structure of the planetary decelerator according to claim 1, characterized by: The surface of the planet carrier is provided with counter bored holes corresponding to the threaded holes.

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