Axial limiting structure of planet carrier

Abstract

The utility model discloses a planet carrier axial limiting structure which comprises a planet carrier body, a spline sleeve is formed on one side of the planet carrier body, and a spline hole of the spline sleeve is communicated with the inner side of the planet carrier body. Two limiting clamping strips are arranged at the end, close to the planet carrier body, of the inner wall of the spline sleeve, and a gap is formed between the two limiting clamping strips. The planet carrier further comprises a limiting plate, two limiting clamping grooves are formed in the positions, corresponding to the limiting clamping strips, of one side of the limiting plate, and the side, provided with the limiting clamping grooves, of the limiting plate extends into the spline hole from the end, close to the planet carrier body, of the spline hole and is clamped on the limiting clamping strips through the limiting clamping grooves, so that the limiting plate and the planet carrier body are fastened together. Two-way limiting of the planet carrier can be achieved only through one limiting component, disassembly and assembly are convenient, the assembling and overhauling efficiency of the gear box is improved, larger axial force can be borne, stability is better, and reliability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of gear boxes, in particular to an axial limiting structure of a planetary frame. Background Art

[0002] The planetary carrier is a key component of planetary gear transmissions and is widely used in large equipment gearboxes and high-torque transmission gearboxes. Currently, the planetary carrier and planetary axle are typically connected using an interference fit, but this method fails to achieve axial position restraint, resulting in low stability and reliability. This is particularly true during transportation, installation, and operation. For example, wind turbine gearboxes require hoisting during installation. After assembly, the input side of the gearbox is slightly higher than the output side, causing the gearbox to tilt. This can easily cause axial movement of the planetary carrier over extended periods of operation, potentially causing gears to mesh incorrectly or interfere with other components, leading to gearbox damage. Furthermore, the planetary carrier can easily fall off when subjected to excessive axial force, causing axial restraint failure and damage to the gearbox. To address this issue, a common method is to install axial retaining rings on both sides of the planetary carrier. However, this approach makes gearbox assembly inconvenient and reduces efficiency. Furthermore, it is difficult to disassemble the gearbox when it is damaged and requires repair. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to solve the problems of poor reliability of the existing planetary carrier axial limit, inconvenient disassembly and assembly of the limit structure, and impact on the assembly and maintenance efficiency of the gear box. A planetary carrier axial limit structure is provided, which can achieve bidirectional limit of the planetary carrier through only one limit component, is easy to disassemble and assemble, thereby improving the assembly and maintenance efficiency of the gear box, and can withstand greater axial forces, with better stability and higher reliability.

[0004] To solve the above technical problems, the present invention adopts the following technical solution: a planetary carrier axial limit structure, comprising a planetary carrier body, a spline sleeve formed on one side of the planetary carrier body, the spline sleeve being coaxially arranged with the planetary carrier body, and a spline hole of the spline sleeve communicating with the inner side of the planetary carrier body; the present invention is characterized in that two limit clips are symmetrically provided along the circumferential direction of the spline hole on the inner wall of the spline sleeve, near one end of the planetary carrier body, and a spacing is provided between the two limit clips;

[0005] It also includes a limit plate, which has two limit slots on one side corresponding to the position of the limit strip. The side of the limit plate with the limit slot extends into the spline hole from the end of the spline hole close to the planetary frame body, and is clamped on the limit strip through the limit slot to achieve fastening with the planetary frame body.

[0006] Furthermore, the limit plate includes a circular base plate, the diameter of which is larger than the diameter of the circle on which the inner sides of the two limit strips are located; a circular boss is provided coaxially on one side of the base plate, the diameter of the boss is less than or equal to the diameter of the circle on which the inner sides of the two limit strips are located; a rib is provided on both sides of the boss at the position corresponding to the limit strips, the rib is parallel to the base plate, and there is a spacing between the rib and the base plate to form a limit slot, and the spacing is consistent with the thickness of the limit strip.

[0007] Furthermore, the outer edge of the rib is arc-shaped, and the diameter of the circle where the outer edges of the two ribs are located is greater than the diameter of the circle where the inner sides of the two limit strips are located and is less than or equal to the diameter of the spline hole; and there is a spacing between the two ribs, and the arc corresponding to the spacing is less than or equal to the arc corresponding to the spacing between the two limit strips; the boss extends into the spline hole from one end of the spline sleeve close to the planetary carrier body, and is clamped on the limit strip through the limit groove formed by the rib and the base plate, and fastened together.

[0008] Furthermore, two limit bars are provided on the inner wall of the spline hole along the circumference of the spline hole, and the two limit bars are connected to the corresponding ends of the two limit clips, wherein the inner side surface of the limit bar and the inner side surface of the limit clip are located on the same cylindrical surface, and one side thereof close to the planetary carrier body is flush with the side surface of the limit clip close to the planetary carrier body, and the other side protrudes from the limit clip; there is a spacing between the limit bar and the other limit clip, and the arc corresponding to the spacing is greater than or equal to the arc corresponding to the retaining edge.

[0009] Furthermore, a section of the limit clip strip away from the limit stop strip has a side surface close to the retaining edge that is an inclined surface, and a thickness thereof gradually increases from the end away from the limit stop strip to the end close to the limit stop strip.

[0010] Furthermore, the diameter of the base plate is consistent with the inner diameter of the spline hole.

[0011] Compared with the existing technology, the utility model has the following advantages: simple structure, through the cooperation of the limit plate and the limit clip, it can be quickly assembled and disassembled, and after assembly, it can achieve two-way axial limitation of the planetary carrier, thereby improving the assembly and maintenance efficiency of the gear box, and can withstand greater axial force, better stability and higher reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the present utility model.

[0013] Figure 2 It is a cross-sectional view of the present invention.

[0014] Figure 3 This is a structural diagram of the planet carrier body.

[0015] Figure 4Schematic diagram of the structure of the limiting plate.

[0016] In the figure: 1 - planet carrier body, 2 - spline sleeve, 3 - spline hole, 4 - limit clip, 5 - limit plate, 6 - bottom plate, 7 - boss, 8 - rib, 9 - limit strip. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it does not require further definition or explanation in subsequent figures. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the figures, or the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and are therefore not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and are not to be construed as indicating or implying relative importance. Furthermore, terms such as "horizontal" and "vertical" do not imply that a component must be absolutely horizontal or overhanging, but rather may be slightly tilted. For example, "horizontal" simply refers to a direction that is more horizontal than "vertical," and does not imply that the structure must be completely horizontal, but rather may be slightly tilted. In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0020] Example: See Figures 1 to 4 A planetary carrier axial limiting structure includes a planetary carrier body 1. During actual assembly, multiple planetary gears are assembled on the planetary carrier body 1, and a sun gear is installed inside the planetary carrier body 1, and the sun gear is simultaneously engaged with each planetary gear. A spline sleeve 2 is formed on one side of the planetary carrier body 1. The spline sleeve 2 is arranged coaxially with the planetary carrier body 1, and the spline sleeve 2 has a spline hole 3 arranged coaxially with the planetary carrier body 1, and the spline hole 3 is connected to the inside of the planetary carrier body 1. On the inner wall of the spline sleeve 2, near one end of the planetary carrier body 1, two limiting clips 4 are symmetrically provided along the circumferential direction of the spline hole 3, and there is a gap between the two limiting clips 4; that is, there is a gap between the two ends of the two limiting clips 4.

[0021] A limit plate 5 is also included. Two limit slots are provided on one side of the limit plate 5, corresponding to the positions of the limit clip 4. The side of the limit plate 5 with the limit slots extends from the end of the spline hole 3 closest to the planet carrier body 1 into the spline hole 3. The limit plate 5 is secured to the limit clip 4 via the limit slots, thereby securing the planet carrier body 1. During assembly, the limit plate 5 can contact the sun gear to reduce the clearance between the sun gear and the limit plate 5, thereby preventing the sun gear from moving toward the limit plate 5.

[0022] The limiting plate 5 includes a circular bottom plate 6, the diameter of which is larger than the diameter of the circle on which the inner sides of the two limiting clips 4 are located. Preferably, the diameter of the bottom plate 6 is consistent with the inner diameter of the spline hole 3, so as to better limit the limiting plate 5. A circular boss 7 is provided on one side of the bottom plate 6 coaxially, and the diameter of the boss 7 is less than or equal to the diameter of the circle on which the inner sides of the two limiting clips 4 are located. A rib 8 is provided on both sides of the boss 7 at the position corresponding to the limiting clip 4. The rib 8 is parallel to the bottom plate 6, and there is a distance between the rib 8 and the bottom plate 6 to form a limiting slot; the distance is consistent with the thickness of the limiting clip 4.

[0023] The outer edges of the ribs 8 are arc-shaped, and the diameter of the circle encompassing the outer edges of the two ribs 8 is greater than the diameter of the circle encompassing the inner sides of the two limit bars 4 and is less than or equal to the diameter of the spline hole 3. Furthermore, there is a spacing between the two ribs 8, and the arc corresponding to this spacing is less than or equal to the arc corresponding to the spacing between the two limit bars 4. The boss 7 extends from the end of the spline sleeve 2 closest to the planetary carrier body 1 into the spline hole 3 and is secured to the limit bar 4 through the limit slot formed by the ribs 8 and the base plate 6, and secured together.

[0024] Two limit bars 9 are also provided along the inner wall of the spline hole 3 along its circumference. These bars 9 are connected to the corresponding ends of the two limit bars 4. The inner side of the limit bar 9 and the inner side of the limit bar 4 are located on the same cylindrical surface. The side of the limit bar 9 that is closest to the planetary carrier body 1 is flush with the side of the limit bar 4 that is closest to the planetary carrier body 1, while the other side protrudes beyond the limit bar 4. A spacing exists between the limit bar 9 and the other limit bar 4, and the arc corresponding to this spacing is greater than or equal to the arc corresponding to the retaining edge 8. In one embodiment, the front ends of the two limit bars 9 are connected to the clockwise or counterclockwise tail ends of the two limit bars 4, respectively.

[0025] In a specific implementation, the side surface of the limit clip 4, distal to the limit stop bar 9 and proximal to the retaining edge 8, is inclined, with its thickness gradually increasing from the end distal to the limit stop bar 9 to the end proximal to the limit stop bar 9. Preferably, the inclined section of the limit clip 4 extends at least to the middle of the limit clip 4. The mating surface of the limit clip 4 and the retaining edge 8 has a certain degree of taper, which can better guide the limit plate 5 during rotation. Furthermore, during the rotation of the limit plate 5, the retaining edge 8 and the limit clip 4 are gradually pressed together, thereby achieving axial compression.

[0026] During assembly of this solution, the retaining edge 8 on the boss 7 of the limit plate 5 is aligned and passes through the gap between the limit clip 4 and the limit stop bar 9, so that one side of the base plate 6 rests on the limit stop bar 9; then, the limit plate 5 is rotated clockwise or counterclockwise. During rotation, the limit clip 4 enters the limit slot, and its two sides are respectively fastened to the base plate 6 and the retaining edge 8 to form axial positioning; the limit plate 5 can be rotated until the end face of the retaining edge 8 is in contact with the end face of the limit stop bar 9 to avoid excessive rotation.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A planet carrier axial limit structure, comprising a planet carrier body, a spline sleeve formed on one side of the planet carrier body, the spline sleeve being coaxially arranged with the planet carrier body, and a spline hole of the spline sleeve communicating with the inner side of the planet carrier body; characterized in that: On the inner wall of the spline sleeve, close to one end of the planet carrier body, two limit clamping strips are symmetrically provided along the circumferential direction of the spline hole, and there is a distance between the two limit clamping strips; It also includes a limit plate, which has two limit slots on one side corresponding to the position of the limit strip. The side of the limit plate with the limit slot extends into the spline hole from the end of the spline hole close to the planetary frame body, and is clamped on the limit strip through the limit slot to achieve fastening with the planetary frame body.

2. The planet carrier axial limiting structure according to claim 1, characterized in that: The limiting plate includes a circular base plate, the diameter of which is larger than the diameter of the circle on which the inner sides of the two limiting strips are located; a circular boss is provided coaxially on one side of the base plate, the diameter of which is less than or equal to the diameter of the circle on which the inner sides of the two limiting strips are located; a rib is provided on both sides of the boss at the position corresponding to the limiting strips, the rib is parallel to the base plate, and there is a spacing between the rib and the base plate to form a limiting slot, and the spacing is consistent with the thickness of the limiting strip.

3. The planet carrier axial limiting structure according to claim 2, characterized in that: The outer edge of the rib is arc-shaped, and the diameter of the circle where the outer edges of the two ribs are located is greater than the diameter of the circle where the inner sides of the two limit strips are located and is less than or equal to the diameter of the spline hole; and there is a spacing between the two ribs, and the arc corresponding to the spacing is less than or equal to the arc corresponding to the spacing between the two limit strips; the boss extends into the spline hole from one end of the spline sleeve close to the planetary carrier body, and is clamped on the limit strip through the limit groove formed by the rib and the base plate, and fastened together.

4. The planet carrier axial limiting structure according to claim 2, characterized in that: Two limit stops are also provided on the inner wall of the spline hole along the circumference of the spline hole, and the two limit stops are connected to the corresponding ends of the two limit clips, wherein the inner side surface of the limit stop and the inner side surface of the limit clip are located on the same cylindrical surface, and one side close to the planetary carrier body is flush with the side surface of the limit clip close to the planetary carrier body, and the other side protrudes from the limit clip; there is a spacing between the limit stop and the other limit clip, and the arc corresponding to the spacing is greater than or equal to the arc corresponding to the retaining edge.

5. The planet carrier axial limiting structure according to claim 2, characterized in that: The side surface of the limit clip strip, which is away from the limit stop strip and close to the retaining edge, is an inclined surface, and the thickness thereof gradually increases from the end away from the limit stop strip to the end close to the limit stop strip.

6. The planet carrier axial limiting structure according to claim 2, characterized in that: The diameter of the base plate is consistent with the inner diameter of the spline hole.

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