Anti-rotation structure for planetary pin shaft

Abstract

The utility model belongs to planetary pin shaft anti -rotation technical field discloses a kind of anti -rotation structure for planetary pin shaft, including anti -rotation baffle, planetary pin shaft, planetary row flange and planet carrier, planetary row flange is installed on the surface of planet carrier, several planetary pin shafts are installed in the hole of planetary row flange and planet carrier, first anti -rotation structure is provided on planetary pin shaft, second anti -rotation structure is provided on anti -rotation baffle, anti -rotation baffle is installed on planetary row flange by second anti -rotation structure cooperation first anti -rotation structure;The utility model can be realized anti -rotation by first anti -rotation structure cooperation second anti -rotation structure, improves the stability and reliability of entire planetary transmission system, saves the structure of the original planetary pin shaft and planetary row flange between by installing multiple elastic cylindrical pin to prevent rotation, reduces process difficulty and assembly complexity, and reduce cost, while due to not need to punch on pin shaft and planetary row flange, improve the strength of planetary row flange.

Description

Technical Field

[0001] This utility model relates to the field of planetary pin anti-rotation technology, specifically to an anti-rotation structure for planetary pins. Background Technology

[0002] In the design and manufacturing of high-end agricultural machinery gearboxes, planetary gear trains are an indispensable key structure to accurately meet the complex and ever-changing speed ratio requirements. Common planetary gear trains are of two types: single-row and double-row. Although they differ in structural layout, both contain the core component of planetary pin structures.

[0003] Planetary pins play a crucial role in planetary gear trains. They need to be precisely assembled with planetary set flanges and planetary carriers. Currently, the industry commonly uses a method to prevent rotation by installing flexible cylindrical pins at the corresponding positions of the planetary pins and planetary set flanges. However, this traditional method faces many challenges in actual operation.

[0004] From a manufacturing process perspective, precise drilling is required on both the planetary pin shaft and the planetary set flange, ensuring accurate hole positioning on both parts. This places extremely high demands on the processing equipment and technical expertise, as even slight deviations can affect subsequent assembly. During assembly, the holes on the two parts must be accurately aligned before the flexible cylindrical pin is hammered in. More importantly, during the actual operation of the gearbox, the flexible cylindrical pin is subjected to various forces, making it prone to loosening and causing the anti-rotation function to fail. Once the anti-rotation function fails, it will not only affect the normal operating performance of the gearbox, but in severe cases, it may even cause the gearbox to malfunction or be damaged, resulting in huge losses to agricultural production.

[0005] Therefore, it is urgent to develop a more reliable and efficient anti-rotation technology for planetary pins. Utility Model Content

[0006] The purpose of this invention is to provide an anti-rotation structure for planetary pins to overcome the problems existing in the prior art. This invention can achieve anti-rotation by combining a first anti-rotation structure with a second anti-rotation structure, thereby improving the stability and reliability of the entire planetary transmission system.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] An anti-rotation structure for a planetary pin includes an anti-rotation baffle, a planetary pin, a planetary set flange, and a planet carrier;

[0009] The planetary set flange is installed on the surface of the planetary carrier, and several planetary pins are installed in the holes of the planetary set flange and the planetary carrier. A first anti-rotation structure is provided on the planetary pins, and a second anti-rotation structure is provided on the anti-rotation baffle. The anti-rotation baffle is installed on the planetary set flange through the cooperation of the second anti-rotation structure and the first anti-rotation structure.

[0010] Furthermore, the first anti-rotation structure includes an anti-rotation notch at one corner of the planetary pin shaft for installation in conjunction with the second anti-rotation structure. One corner of the anti-rotation notch has an assembly guide angle for guiding the anti-rotation baffle during installation.

[0011] Furthermore, the number of anti-rotation notches is equal to the number of assembly guide angles;

[0012] Furthermore, the assembly guide angle is 30°~45°;

[0013] Furthermore, the second anti-rotation structure includes several anti-rotation chamfers provided on the anti-rotation baffle, the anti-rotation chamfers matching the anti-rotation notch for installation in conjunction with the anti-rotation notch;

[0014] Furthermore, the number of anti-rotation chamfers is equal to the number of planetary pins;

[0015] Furthermore, the anti-rotation baffle is a rectangular baffle;

[0016] Furthermore, the anti-rotation chamfer includes a first anti-rotation chamfer, a second anti-rotation chamfer, a third anti-rotation chamfer, and a fourth anti-rotation chamfer respectively disposed at the four corners of the anti-rotation baffle, and the first anti-rotation chamfer, the second anti-rotation chamfer, the third anti-rotation chamfer, and the fourth anti-rotation chamfer are respectively matched with the anti-rotation notch;

[0017] Furthermore, the anti-rotation baffle is mounted on the planetary gear set flange using fasteners;

[0018] Furthermore, the fastener includes a screw.

[0019] The above technical solution has the following advantages or beneficial effects:

[0020] This invention provides an anti-rotation structure for planetary pins. Anti-rotation is achieved by using an anti-rotation baffle with a second anti-rotation structure and a planetary pin with a first anti-rotation structure. The anti-rotation baffle is machined to fit the first anti-rotation structure of the planetary pin, and then fixed to the planetary set flange to achieve anti-rotation. The anti-rotation baffle can be directly stamped out, and the notch in the planetary pin can be directly milled, making the process easy to implement. This structure eliminates the need for multiple elastic cylindrical pins between the planetary pin and the planetary set flange, reducing manufacturing difficulty and assembly complexity, and lowering costs. Furthermore, since drilling is not required on the pin and planetary set flange, the strength of the planetary set flange is improved.

[0021] Furthermore, the clever design of the anti-rotation notch allows for seamless installation with the second anti-rotation structure, effectively preventing the planetary pin from rotating during operation. This enhances the stability and reliability of the entire planetary transmission system, reduces wear and vibration caused by pin rotation, and extends equipment lifespan. The addition of the assembly guide angle greatly facilitates the installation of the anti-rotation baffle, making the installation process smoother and more precise, reducing installation difficulty and time costs, improving assembly efficiency, ensuring the anti-rotation structure can be installed quickly and accurately, and guaranteeing the normal functioning of the planetary pin's anti-rotation function.

[0022] Furthermore, the design that the number of anti-rotation notches and assembly guide angles are equal ensures that the two can be perfectly matched during installation. Each anti-rotation notch has a corresponding assembly guide angle for precise guidance, which guarantees the consistency and stability of the installation and effectively avoids installation deviations or interference caused by mismatch in quantity, thereby improving the installation quality.

[0023] Furthermore, setting the assembly guide angle within the range of 30° to 45° provides sufficient guidance during installation, allowing the anti-rotation baffle to slide smoothly into the anti-rotation notch, while avoiding the structural strength being affected by an excessively large angle or the guiding effect being poor due to an excessively small angle.

[0024] Furthermore, the anti-rotation baffle is equipped with several anti-rotation chamfers that match the anti-rotation notches, thus achieving the anti-rotation function. When the anti-rotation baffle is installed with the planetary pin, the anti-rotation chamfers are precisely embedded in the anti-rotation notches, and the two work closely together to effectively prevent the planetary pin from rotating. This greatly improves the stability of the planetary transmission system, reduces vibration, noise, and component wear caused by pin rotation, and extends the service life of the equipment. Moreover, it makes the installation process smoother, allows for quick and accurate positioning, reduces installation difficulty and time costs, improves assembly efficiency, and ensures the reliability and practicality of the planetary pin anti-rotation structure.

[0025] Furthermore, the number of anti-rotation chamfers is equal to the number of planetary pins, ensuring that each pin has a corresponding anti-rotation chamfer for precise matching, achieving a comprehensive and stable anti-rotation effect, effectively preventing individual pins from rotating due to lack of effective restraint, and improving the stability and reliability of the entire transmission system.

[0026] Furthermore, the rectangular baffle design has a simple structure, is easy to process and manufacture, reduces production costs, and is convenient to position during installation.

[0027] Furthermore, anti-rotation chamfers are set at the four corners of the baffle and matched with the anti-rotation notches. This layout is reasonable and can make full use of the baffle space. During installation, the chamfers and notches can be quickly and accurately connected, which improves assembly efficiency, ensures stable operation of the planetary pin shaft in complex working environments, reduces wear and failure, and extends the service life of the equipment.

[0028] Furthermore, by fixing the anti-rotation baffle to the planetary set flange with screws, the original structure of installing multiple elastic cylindrical pins between the planetary pin shaft and the planetary set flange to prevent rotation is eliminated, reducing the difficulty of the process and the complexity of assembly, and reducing costs; at the same time, it also improves the strength of the planetary set flange and has no limitation on the wall thickness of the planetary set flange. Attached Figure Description

[0029] Figure 1 This is a front view of an anti-rotation structure for a planetary pin according to the present invention;

[0030] Figure 2 This is a cross-sectional view of an anti-rotation structure for a planetary pin according to the present invention.

[0031] Figure 3 This is a schematic diagram of an anti-rotation baffle structure for an anti-rotation structure of a planetary pin according to the present invention;

[0032] Figure 4 This is a schematic diagram of a planetary pin structure for an anti-rotation structure of a planetary pin according to the present invention.

[0033] In the diagram, 1. Anti-rotation baffle; 11. First anti-rotation chamfer; 12. Second anti-rotation chamfer; 13. Third anti-rotation chamfer; 14. Fourth anti-rotation chamfer; 2. Planetary pin; 21. Anti-rotation notch; 22. Assembly guide angle; 3. Screw; 4. Planetary set flange; 5. Planetary carrier. Detailed Implementation

[0034] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] See Figure 1 and Figure 2 This utility model provides an anti-rotation structure for a planetary pin, including an anti-rotation baffle 1, a planetary pin 2, a first anti-rotation structure, a second anti-rotation structure, a planetary set flange 4, and a planetary carrier 5; the first anti-rotation structure includes an anti-rotation notch 21 and an assembly guide angle 22; the second anti-rotation structure includes an anti-rotation chamfer; the anti-rotation chamfer includes a first anti-rotation chamfer 11, a second anti-rotation chamfer 12, a third anti-rotation chamfer 13, and a fourth anti-rotation chamfer 14;

[0041] The planetary set flange 4 is mounted on the surface of the planetary carrier 5. Several planetary pins 2 are mounted in the holes of the planetary set flange 4 and the planetary carrier 5. The planetary pins 2 are provided with a first anti-rotation structure, and the anti-rotation baffle 1 is provided with a second anti-rotation structure. The anti-rotation baffle 1 is mounted on the planetary set flange 4 through the cooperation of the second anti-rotation structure and the first anti-rotation structure.

[0042] See Figure 4 The first anti-rotation structure includes an anti-rotation notch 21 located at one corner of the planetary pin 2, which is used to cooperate with the second anti-rotation structure for installation. An assembly guide angle 22 is provided at one corner of the anti-rotation notch 21 for guiding the anti-rotation baffle 1 during installation. The number of anti-rotation notches 21 is equal to the number of assembly guide angles 22.

[0043] See Figure 3 The second anti-rotation structure includes several anti-rotation chamfers on the anti-rotation baffle 1. The number of anti-rotation chamfers is equal to the number of planetary pins 2. The anti-rotation chamfers match the anti-rotation notches 21 and are used to cooperate with the anti-rotation notches 21 for installation. In use, the anti-rotation baffle 1 is guided by several assembly guide angles 22 during installation. The anti-rotation chamfers cooperate with the anti-rotation notches 21, and then the anti-rotation baffle 1 is installed on the planetary set flange 4 by fasteners.

[0044] Preferably, the assembly guide angle 22 is 30°~45°, wherein the anti-rotation chamfer angle can be 30°, 35°, 40° and 45°, or any other angle between 30° and 45° that can cooperate with the anti-rotation baffle 1;

[0045] Preferably, the anti-rotation baffle 1 is a rectangular baffle, and the anti-rotation chamfer includes a first anti-rotation chamfer 11, a second anti-rotation chamfer 12, a third anti-rotation chamfer 13 and a fourth anti-rotation chamfer 14 respectively provided at the four corners of the anti-rotation baffle 1. The first anti-rotation chamfer 11, the second anti-rotation chamfer 12, the third anti-rotation chamfer 13 and the fourth anti-rotation chamfer 14 are respectively matched with the anti-rotation notch 21;

[0046] Preferably, the fastener can be a screw, bolt, washer, or other fasteners that can achieve fastening.

[0047] The structure and working principle of this utility model will be further explained below:

[0048] The purpose of this utility model is to provide an anti-rotation structure for planetary pins. When using this device, the anti-rotation baffle 1 is a stamped part, and the anti-rotation baffle 1 is provided with a first anti-rotation chamfer 11, a second anti-rotation chamfer 12, a third anti-rotation chamfer 13 and a fourth anti-rotation chamfer 14, for a total of four anti-rotation chamfers. The planetary pin 2 is provided with an anti-rotation notch 21 for cooperating with the four anti-rotation chamfers on the anti-rotation baffle 1. The planetary pin 2 is also provided with an assembly guide angle 22 for guiding the anti-rotation baffle 1 during installation. This anti-rotation structure is mainly used to prevent the planetary pins in planetary gear trains from rotating. In use, the planetary pin 2 is installed into the holes of the planet carrier 5 and the planetary set flange 4, and then the anti-rotation baffle 1 is installed onto the planetary set flange 4 with screws 3. During installation, the four anti-rotation chamfers of the anti-rotation baffle 1 are aligned with the four anti-rotation notches 21 respectively, and the assembly guide angle 22 is used to install the anti-rotation baffle 1 into place.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications made to the technical solutions based on the technical concept proposed by this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. An anti-rotation structure for a planetary pin, characterized in that, It includes an anti-rotation baffle (1), a planetary pin (2), a planetary set flange (4), and a planetary carrier (5); The planetary set flange (4) is installed on the surface of the planetary carrier (5), and several planetary pins (2) are installed in the holes of the planetary set flange (4) and the planetary carrier (5). The planetary pins (2) are provided with a first anti-rotation structure, and the anti-rotation baffle (1) is provided with a second anti-rotation structure. The anti-rotation baffle (1) is installed on the planetary set flange (4) through the cooperation of the second anti-rotation structure and the first anti-rotation structure.

2. The anti-rotation structure for a planetary pin according to claim 1, characterized in that, The first anti-rotation structure includes an anti-rotation notch (21) set at one corner of the planetary pin (2) for installation in conjunction with the second anti-rotation structure. An assembly guide angle (22) is provided at one corner of the anti-rotation notch (21) for guiding the anti-rotation baffle (1) during installation.

3. The anti-rotation structure for a planetary pin according to claim 2, characterized in that, The number of anti-rotation notches (21) is equal to the number of assembly guide angles (22).

4. The anti-rotation structure for a planetary pin according to claim 2, characterized in that, The assembly guide angle (22) is 30°~45°.

5. The anti-rotation structure for a planetary pin according to claim 2, characterized in that, The second anti-rotation structure includes several anti-rotation chamfers set on the anti-rotation baffle (1), which are matched with the anti-rotation notch (21) and are used to cooperate with the anti-rotation notch (21) for installation.

6. The anti-rotation structure for a planetary pin according to claim 5, characterized in that, The number of anti-rotation chamfers is equal to the number of planetary pins (2).

7. The anti-rotation structure for a planetary pin according to claim 6, characterized in that, The anti-rotation baffle (1) is a rectangular baffle.

8. The anti-rotation structure for a planetary pin according to claim 7, characterized in that, The anti-rotation chamfers include a first anti-rotation chamfer (11), a second anti-rotation chamfer (12), a third anti-rotation chamfer (13), and a fourth anti-rotation chamfer (14) respectively set at the four corners of the anti-rotation baffle (1). The first anti-rotation chamfer (11), the second anti-rotation chamfer (12), the third anti-rotation chamfer (13), and the fourth anti-rotation chamfer (14) are respectively matched with the anti-rotation notch (21).

9. The anti-rotation structure for a planetary pin according to claim 1, characterized in that, The anti-rotation baffle (1) is installed on the planetary gear flange (4) by fasteners.

10. The anti-rotation structure for a planetary pin according to claim 9, characterized in that, The fasteners include screws (3).

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