Planetary transmission structure and wind turbine gearbox

Abstract

The utility model relates to a wind power gear box technical field, specifically disclose a kind of planetary transmission structure and wind power gear box. Planet carrier is provided with jack and first recess, first recess is set in the side of jack axial and parallel to the axis of jack extension;Pin shaft is inserted into jack, and the axial one end of pin shaft is provided with second recess, second recess has first side wall and second side wall, and first side wall is parallel with the axis of pin shaft;Limiting piece includes the first connecting portion and second connecting portion of fixed connection, the first connecting portion is inserted into first recess, and the second connecting portion is inserted into second recess and with first side wall and second side wall abut;Threaded fastener is provided with at least two, and the first connecting portion is fixed with planet carrier by threaded fastener. When pin shaft has the tendency of rotating relative to planet carrier, planet carrier gives limiting piece reverse force, to limit the tendency of pin shaft moving relative to planet carrier.

Description

Technical Field

[0001] This utility model relates to the field of wind power gearbox technology, and in particular to a planetary transmission structure and a wind power gearbox. Background Technology

[0002] In wind turbine gearboxes, preventing circumferential rotation and axial movement of the pins during operation has always been a difficult problem. One reason is that currently, preventing relative rotation between the pins and planetary carriers usually involves increasing the interference fit between them. While this reduces the risk of relative rotation to some extent, it increases the difficulty of pin assembly, reduces assembly efficiency, and affects later disassembly and maintenance. Another reason is that to prevent axial movement of the pins, a flexible retaining ring is usually added to the tail of the pin for axial positioning and anti-dislodgement. This requires ensuring a precise fit between the retaining ring and the ring groove to prevent loosening and failure, and also ensuring that the retaining ring material has high performance and stability to prevent deformation and breakage during operation. These two factors increase the processing cost and reduce the efficiency of the planetary carrier and retaining ring.

[0003] Therefore, there is an urgent need for a planetary transmission structure and a wind turbine gearbox to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a planetary transmission structure and a wind power gearbox to solve the problem of circumferential rotation and axial movement of the pin relative to the planet carrier.

[0005] This utility model provides a planetary transmission structure, which includes:

[0006] The planetary carrier has a socket and a first groove, wherein the first groove is located on one side of the axial direction of the socket and extends parallel to the axis of the socket.

[0007] A pin is inserted into the aforementioned insertion hole. A second groove is provided at one axial end of the pin. The second groove has a first sidewall and a second sidewall. The first sidewall is parallel to the axis of the pin.

[0008] The limiting member includes a first connecting part and a second connecting part that are fixed together. The first connecting part is inserted into the first groove, and the second connecting part is inserted into the second groove and abuts against the first sidewall and the second sidewall.

[0009] At least two threaded fasteners are provided, and the first connecting part and the planetary carrier are fixed by the threaded fasteners.

[0010] As a preferred embodiment of the above-mentioned planetary transmission structure, the inner peripheral wall of the first groove includes a first contact surface and a second contact surface, the first contact surface and the second contact surface are disposed opposite to each other, and the first connecting portion abuts against the first contact surface or the second contact surface.

[0011] As a preferred embodiment of the above-mentioned planetary transmission structure, the inner peripheral wall of the second groove includes a third side wall and a fourth side wall. The third side wall is disposed on one side of the first side wall, and the fourth side wall is disposed on the other side of the first side wall. When the pin has a rotational tendency, the second connecting part abuts against the third side wall or the fourth side wall.

[0012] As a preferred embodiment of the aforementioned planetary transmission structure, the first groove is connected to the aforementioned socket in the radial direction of the socket.

[0013] As a preferred embodiment of the aforementioned planetary transmission structure, the second groove penetrates the outer peripheral wall of the pin in the radial direction of the pin.

[0014] As a preferred embodiment of the above-mentioned planetary transmission structure, the axial end face of the pin is coplanar with the axial end face of the insertion hole.

[0015] As a preferred embodiment of the aforementioned planetary transmission structure, the aforementioned threaded fastener is inserted into the aforementioned limiting member and the aforementioned planetary carrier along the axis of the aforementioned insertion hole.

[0016] As a preferred embodiment of the aforementioned planetary transmission structure, a gasket is provided between the aforementioned threaded fastener and the aforementioned limiting member.

[0017] As a preferred embodiment of the aforementioned planetary transmission structure, the first sidewall and the second sidewall are arranged perpendicularly.

[0018] A wind turbine gearbox includes the aforementioned planetary transmission structure.

[0019] The planetary transmission structure provided by this utility model has at least the following beneficial effects:

[0020] This utility model provides a planetary transmission structure and a wind turbine gearbox. The planetary transmission structure includes a planetary carrier, a pin, a limiting member, and threaded fasteners. The planetary carrier has an insertion hole and a first groove. The first groove is located on one side of the insertion hole's axial direction and extends parallel to the hole's axis. The pin is inserted into the insertion hole, and a second groove is formed at one axial end of the pin. The second groove has a first sidewall and a second sidewall, with the first sidewall parallel to the pin's axis. The limiting member includes a first connecting part and a second connecting part fixedly connected together. The first connecting part is inserted into the first groove, and the second connecting part is inserted into the second groove and abuts against the first and second sidewalls. At least two threaded fasteners are provided, and the first connecting part is fixed to the planetary carrier by the threaded fasteners.

[0021] The planetary carrier has a through hole and a first groove. The through hole extends through both sides of the planetary carrier. The first groove is located on one axial end face of the through hole, and its depth direction is parallel to the axial direction of the through hole. A pin is inserted axially into the through hole. One end of the pin passes through the through hole and is used to mount a planetary gear. The other end has a second groove, the depth direction of which is parallel to the axial direction of the through hole. The second groove includes a first sidewall and a second sidewall, with the first sidewall parallel to the axial direction of the through hole. The pin is fixed to the planetary carrier by a limiting member, which includes a first connecting part and a second connecting part that are fixed to each other. The first connecting part is inserted into the first groove and fixed to the planetary carrier by at least two threaded fasteners. The second connecting part is inserted into the second groove and includes a first abutting surface and a bottom surface. The first abutting surface fits against the first sidewall of the second groove, and the bottom surface fits against the second sidewall. When the pin tends to rotate relative to the planet carrier, the first sidewall abuts against the first contact surface, and the second connecting part transmits the force to the peripheral sidewall of the planet carrier through the first connecting part, generating a reaction force to limit the tendency of the pin to move relative to the planet carrier. The limiting member and the pin, as well as the limiting member and the planet carrier, all adopt surface contact, which has a large contact area, stable support effect, and can avoid stress concentration. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the planetary transmission structure in an embodiment of this utility model;

[0023] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0024] Figure 3 This is a front view of the planetary transmission structure in an embodiment of this utility model;

[0025] Figure 4 for Figure 3 A magnified view of a portion of the image;

[0026] Figure 5 This is a partial enlarged view of the planetary carrier in an embodiment of this utility model;

[0027] Figure 6 This is a schematic diagram of the pin structure in one embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the pin structure in another embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the limiting component in an embodiment of the present utility model.

[0030] In the picture:

[0031] 1. Planetary carrier; 11. Socket; 12. First groove; 121. First contact surface; 122. Second contact surface;

[0032] 2. Pin; 21. Second groove; 211. First sidewall; 212. Second sidewall; 213. Third sidewall; 214. Fourth sidewall;

[0033] 3. Limiting component; 31. First connecting part; 311. Second abutting surface; 312. Third abutting surface; 32. Second connecting part; 321. First abutting surface;

[0034] 4. Threaded fasteners. Detailed Implementation

[0035] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0039] like Figures 1 to 8 As shown, this utility model provides a planetary transmission structure, including a planet carrier 1, a pin 2, a limiting member 3, and threaded fasteners 4. The planet carrier 1 has an insertion hole 11 and a first groove 12. The first groove 12 is located on one side of the insertion hole 11 along its axial direction and extends parallel to the axis of the insertion hole 11. The pin 2 is inserted into the insertion hole 11, and a second groove 21 is formed at one axial end of the pin 2. The second groove 21 has a first sidewall 211 and a second sidewall 212, with the first sidewall 211 parallel to the axis of the pin 2. The limiting member 3 includes a first connecting part 31 and a second connecting part 32 fixedly connected together. The first connecting part 31 is inserted into the first groove 12, and the second connecting part 32 is inserted into the second groove 21 and abuts against the first sidewall 211 and the second sidewall 212. At least two threaded fasteners 4 are provided, and the first connecting part 31 is fixed to the planet carrier 1 by the threaded fasteners 4.

[0040] For example, the planetary carrier 1 has a socket 11 and a first groove 12. The socket 11 is a through hole that passes through both sides of the planetary carrier 1. The first groove 12 is formed on one axial end face of the socket 11. The depth direction of the first groove 12 is parallel to the axial direction of the socket 11. The pin 2 is inserted into the socket 11 along the axial direction. One end of the pin 2 passes through the socket 11 and is used to install the planetary gear. The other end has a second groove 21. The depth direction of the second groove 21 is parallel to the axial direction of the socket 11. The second groove 21 includes a first sidewall 211 and a second sidewall 212. The first sidewall 211 is parallel to the axial direction of the socket 11. The pin 2 is fixed to the planet carrier 1 by a limiting member 3. The limiting member 3 includes a first connecting part 31 and a second connecting part 32 that are fixed to each other. The first connecting part 31 is inserted into the first groove 12 and fixed to the planet carrier 1 by at least two threaded fasteners 4. The second connecting part 32 is inserted into the second groove 21 and includes a first abutting surface 321 and a bottom surface. The first abutting surface 321 fits against the first sidewall 211 of the second groove 21, and the bottom surface fits against the second sidewall 212. When the pin 2 has a tendency to rotate relative to the planet carrier 1, the first sidewall 211 abuts against the first abutting surface 321, and the second connecting part 32 transmits the force to the peripheral sidewall of the planet carrier 1 through the first connecting part 31, generating a reaction force to limit the tendency of the pin 2 to move relative to the planet carrier 1. The limiting member 3 and the pin 2, as well as the limiting member 3 and the planet carrier 1, all have surface contact, which has a large contact area, stable support effect, and can avoid stress concentration.

[0041] Furthermore, multiple threaded fasteners 4 can distribute the total clamping force to multiple points, forming a larger, more uniform clamping area, thereby reducing surface pressure and preventing the surfaces of the connected parts from being crushed or permanently deformed. Furthermore, multiple threaded fasteners 4 can work together to form a strong couple and support points, thus resisting overturning torque. Under the action of torque, one side of the threaded fastener 4 is under tension, while the other side's threaded fastener 4 ensures that the mating surfaces do not separate and withstands pressure through preload. Furthermore, the symmetrical arrangement of multiple threaded fasteners 4 can limit the movement and deflection of the limiting member 3 in all directions, improving the rigidity and stability of the entire assembly.

[0042] Optionally, the inner peripheral wall of the first groove 12 includes a first contact surface 121 and a second contact surface 122, the first contact surface 121 and the second contact surface 122 are disposed opposite to each other, and the first connecting part 31 abuts against the first contact surface 121 or the second contact surface 122.

[0043] For example, the first contact surface 121 and the second contact surface 122 are located on the rotation trajectory of the pin 2. The limiting member 3 also includes a second abutting surface 311 and a third abutting surface 312. When the limiting member 3 is inserted into the first groove 12, the second abutting surface 311 is in close contact with the first contact surface 121, and the third abutting surface 312 is in close contact with the second contact surface 122. When the pin 2 has a rotation tendency, the limiting member 3 also has a deflection tendency. The limiting member 3 abuts against the first contact surface 121 and the second contact surface 122 on the corresponding side according to the rotation direction of the pin 2 to obtain support for the planetary carrier 1.

[0044] Optionally, the inner peripheral wall of the second groove 21 includes a third side wall 213 and a fourth side wall 214. The third side wall 213 is disposed on one side of the first side wall 211, and the fourth side wall 214 is disposed on the other side of the first side wall 211. When the pin 2 has a rotational tendency, the second connecting part 32 abuts against the third side wall 213 or the fourth side wall 214.

[0045] For example, the second groove 21 is U-shaped when projected along the axial direction of the pin 2. When the pin 2 has a tendency to rotate, the third sidewall 213 and the fourth sidewall 214 constrain the second connecting portion 32, thereby preventing the pin 2 from rotating.

[0046] Optionally, in the radial direction of the pin 2, the second groove 21 penetrates the outer peripheral wall of the pin 2.

[0047] Optionally, in the radial direction of the pin 2, the second groove 21 penetrates the outer peripheral wall of the pin 2.

[0048] For example, the first groove 12 forms a first opening in the radial direction of the insertion hole 11, and the second groove 21 forms a second opening in the radial direction of the pin 2. The first opening and the second opening can communicate with each other, so that the first groove 12 and the second groove 21 form a cavity, and the limiting member 3 can be directly inserted into the cavity. In this way, the structure of the limiting member 3 can be simplified, for example, it can be a plate.

[0049] Optionally, along the axial direction of the insertion hole 11, the depth dimension of the first groove 12 is greater than or equal to the thickness dimension of the first connecting portion 31, and along the axial direction of the pin 2, the depth dimension of the second groove 21 is greater than or equal to the thickness dimension of the second connecting portion 32.

[0050] For example, the depth of the first groove 12 is greater than or equal to the thickness of the first connecting part 31. Thus, when the first connecting part 31 is inserted into the first groove 12, the end face of the first connecting part 31 facing away from the bottom of the first groove 12 does not protrude from the end face of the first groove 12, maintaining the aesthetics of the structure, reducing axial space occupation, and increasing the contact area between the first connecting part 31 and the inner wall of the first groove 12. Similarly, the depth of the second groove 21 is greater than or equal to the thickness of the second connecting part 32. Thus, when the second connecting part 32 is inserted into the second groove 21, the end face of the second connecting part 32 facing away from the bottom of the second groove 21 does not protrude from the end face of the second groove 21, maintaining the aesthetics of the structure, reducing axial space occupation, and increasing the contact area between the second connecting part 32 and the inner wall of the second groove 21.

[0051] Preferably, the axial end face of the pin 2 is coplanar with the axial end face of the insertion hole 11.

[0052] Optionally, the threaded fastener 4 is inserted into the limiting member 3 and the planetary carrier 1 along the axis of the insertion hole 11.

[0053] For example, the first connecting portion 31 of the limiting member 3 is inserted into the first groove 12 along the axis of the insertion hole 11, and the second connecting portion 32 is inserted into the second groove 21 along the axis of the insertion hole 11. The first connecting portion 31 has a smooth hole along the axis of the insertion hole 11, and the bottom wall of the first groove 12 has a threaded hole along the axis of the insertion hole 11. The threaded fastener 4 includes a screw portion and a nut portion, which are fixedly connected. The nut portion is located on the side of the first connecting portion 31 opposite to the first groove 12. After the screw portion is inserted into the first connecting portion 31, it is threadedly connected to the planetary carrier 1.

[0054] When the pin 2 has a tendency to rotate, it acts on the limiting member 3, causing the limiting member 3 to also have a tendency to rotate relative to the planet carrier 1. Since the limiting member 3 and the planet carrier 1 are connected by a threaded fastener 4, the threaded fastener 4 also has a tendency to rotate, thereby causing the threaded fastener 4 to loosen. For this purpose, optionally, a gasket is provided between the threaded fastener 4 and the limiting member 3.

[0055] For example, a gasket is sandwiched between the nut portion of the threaded fastener 4 and the first connecting portion 31 of the limiting member 3. The gasket is made of rubber and can increase the frictional resistance of the nut portion of the threaded fastener 4, thereby suppressing the rotation tendency of the threaded fastener 4 and preventing the threaded fastener 4 from loosening.

[0056] Optionally, the first sidewall 211 and the second sidewall 212 are arranged vertically. This arrangement facilitates processing and the alignment and installation of the limiting member 3.

[0057] A wind turbine gearbox includes the aforementioned planetary transmission structure.

[0058] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A planetary transmission structure, characterized in that, include: Planetary carrier (1) has a socket (11) and a first groove (12), the first groove (12) is located on one side of the axial direction of the socket (11) and extends parallel to the axis of the socket (11); A pin (2) is inserted into the insertion hole (11). A second groove (21) is provided at one axial end of the pin (2). The second groove (21) has a first sidewall (211) and a second sidewall (212). The first sidewall (211) is parallel to the axis of the pin (2). The limiting member (3) includes a first connecting part (31) and a second connecting part (32) fixedly connected. The first connecting part (31) is inserted into the first groove (12), and the second connecting part (32) is inserted into the second groove (21) and abuts against the first side wall (211) and the second side wall (212). At least two threaded fasteners (4) are provided, and the first connecting part (31) is fixed to the planetary carrier (1) by the threaded fasteners (4).

2. The planetary transmission structure according to claim 1, characterized in that, The inner peripheral wall of the first groove (12) includes a first contact surface (121) and a second contact surface (122). The first contact surface (121) and the second contact surface (122) are disposed opposite to each other, and the first connecting part (31) abuts against the first contact surface (121) or the second contact surface (122).

3. The planetary transmission structure according to claim 1, characterized in that, The inner peripheral wall of the second groove (21) includes a third side wall (213) and a fourth side wall (214). The third side wall (213) is disposed on one side of the first side wall (211), and the fourth side wall (214) is disposed on the other side of the first side wall (211). When the pin (2) has a rotational tendency, the second connecting part (32) abuts against the third side wall (213) or the fourth side wall (214).

4. The planetary transmission structure according to claim 1, characterized in that, In the radial direction of the socket (11), the first groove (12) communicates with the socket (11).

5. The planetary transmission structure according to claim 1, characterized in that, In the radial direction of the pin (2), the second groove (21) penetrates the outer peripheral wall of the pin (2).

6. The planetary transmission structure according to claim 1, characterized in that, The axial end face of the pin (2) is coplanar with the axial end face of the insertion hole (11).

7. The planetary transmission structure according to claim 1, characterized in that, The threaded fastener (4) is inserted into the limiting member (3) and the planetary carrier (1) along the axis of the insertion hole (11).

8. The planetary transmission structure according to claim 1, characterized in that, A gasket is provided between the threaded fastener (4) and the limiting member (3).

9. The planetary transmission structure according to claim 1, characterized in that, The first sidewall (211) and the second sidewall (212) are arranged vertically.

10. A wind turbine gearbox, characterized in that, Includes the planetary transmission structure as described in any one of claims 1-9.

Images