CN111878571A - Planet carrier connecting structure - Google Patents

Abstract

The invention relates to the technical field of planetary gears, and discloses a planetary carrier connection structure for connecting the planetary carrier and the main shaft. The hole is sleeved on the connecting part, and the elastic modulus of the main shaft is set to be smaller than the elastic modulus of the connecting part; the abutting piece, the connecting part is provided with a resisting hole, and the resisting piece is placed in the resisting hole and abuts against the resisting part. On the inner wall of the holding hole, the connecting part is clamped between the main shaft and the abutting part; the locking disc is sleeved on the main shaft and presses the main shaft toward the connecting part. Through the above structure, the planet carrier connection structure can increase the contact pressure between the main shaft and the planet carrier, thereby improving the torque transmission capacity between the main shaft and the planet carrier.

Description

A planet carrier connection structure

technical field

The invention relates to the technical field of planetary gears, in particular to a planet carrier connection structure.

Background technique

In the planetary gearbox, in order to transmit the torque transmitted from the main shaft to the planet carrier, the planet carrier of the wind turbine gearbox and the main shaft are generally connected by a lock plate.

Usually, as shown in FIG. 1 , the position of the locking disk 1 ′ is located outside the connecting portion 2 ′ of the planet carrier, and the main shaft 3 ′ is located inside the connecting portion 2 ′ of the planet carrier, that is, the locking disk 1 ′ connects the planet carrier’s connecting portion 2 ′. The connecting portion 2' is tightened and pressed on the main shaft 3'. The pressure generated by the locking disc 1' will be transmitted to the contact surface of the main shaft 3' and the connection part 2' of the planet carrier through the connection part 2' of the planet carrier, so as to realize the connection between the main shaft 3' and the connection part 2' of the planet carrier, Thereby, the purpose of transmitting the torque of the main shaft 3' to the planet carrier is achieved.

At present, the commonly used material of the planet carrier is QT700, and the commonly used material of the main shaft 3' is steel or QT400. Since the elastic modulus of QT700 is higher than that of QT400, under the action of the pressure of the locking disc 1', the connecting part 2' of the planet carrier is not prone to radial deformation (because the stiffness of the planet carrier is large), while the main shaft 3' is prone to Radial deformation (because the rigidity of the main shaft 3' is small), so that the final pressure transmitted to the contact surface of the main shaft 3' and the connecting part 2' of the planet carrier is small, so that the connecting part of the main shaft 3' and the planet carrier is smaller The torque transfer ability between 2' is poor.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a planet carrier connection structure, which can increase the contact pressure between the main shaft and the planet carrier, thereby improving the torque transmission capacity between the main shaft and the planet carrier.

For this purpose, the present invention adopts the following technical solutions:

A planet carrier connection structure, which is used for connecting a planet carrier and a main shaft, comprising: a connecting part, the connecting part is arranged on the planet carrier, a connecting hole is opened on the main shaft, and the main shaft passes through the The connecting hole is sleeved on the connecting part, and the elastic modulus of the main shaft is smaller than the elastic modulus of the connecting part; the abutting piece is provided with a resisting hole on the connecting part, and the resisting piece is placed on the connecting part. the abutting hole is in and abutted on the inner wall of the abutting hole, so that the connecting part is clamped between the main shaft and the abutting piece; a locking plate, the locking plate is sleeved on the main shaft, and press the main shaft to the connecting part.

As a preferred solution of the planet carrier connection structure, the part where the main shaft is sleeved with the connecting part is provided with a plurality of axial grooves, and the plurality of axial grooves are evenly distributed at equal intervals along the circumference of the main shaft.

As a preferred solution of the planet carrier connecting structure, a step is formed on the outer peripheral wall of the connecting portion, and the connecting hole is sleeved on the small diameter section of the step.

As a preferred solution of the planet carrier connection structure, the abutting member is located at the small diameter section of the step, and is directly opposite to the main shaft and the socket portion of the connection portion.

As a preferred solution of the planet carrier connection structure, the axial length of the abutting member is equal to the length of the main shaft and the socket portion of the connection portion.

As a preferred solution of the planet carrier connection structure, the resisting member is provided in a cylindrical shape, and the outer peripheral wall surface of the resisting member abuts on the inner wall of the resisting hole.

As a preferred solution of the planet carrier connection structure, the abutting member is provided with a weight reduction hole, and the central axis of the weight reduction hole is set to coincide with the central axis of the connecting portion.

As a preferred solution of the planet carrier connection structure, the locking disk includes an outer disk and an inner disk, the inner disk is axially slidably arranged on the inner ring surface of the outer disk, and the cross-sectional shape of the inner disk is wedge-shaped. When the inner disk is inserted between the outer disk and the main shaft, the locking disk can squeeze and lock the main shaft. As a preferred solution of the planet carrier connection structure, the inner ring surface of the outer disk is set as an inclined surface and is parallel to the wedge-shaped surface of the inner disk.

As a preferred solution of the planet carrier connection structure, the inner disk is provided with a connection table, and the connection table is axially connected to the end face of the outer disk through bolts.

Beneficial effects of the present invention:

The invention provides a planet carrier connection structure, which is used to connect the planet carrier with the main shaft. The planet carrier connection structure includes a connection part, a resisting member and a locking disc. The connection part is arranged on the planet carrier, and the main shaft is opened There is a connecting hole, the main shaft is sleeved on the connecting part through the connecting hole, the elastic modulus of the main shaft is set to be smaller than the elastic modulus of the connecting part, the connecting part is provided with a resisting hole, and the resisting piece is placed in the resisting hole and abutting It is held on the inner wall of the abutting hole, so that the connecting part is clamped between the main shaft and the abutting part, and the locking disc is sleeved on the main shaft and the main shaft is locked and squeezed towards the connecting part, so that the main shaft is tightly pressed against the connection part. on the upper part, so as to realize the torque transmission between the main shaft and the planet carrier. In the above structure, since the elastic modulus of the main shaft is smaller than the elastic modulus of the connecting part of the planet carrier, when the main shaft is squeezed by the lock plate, it will deform and press the connecting part of the planet carrier, and the connecting part between the main shaft and the planet carrier is increased. The contact pressure between the main shaft and the planet carrier improves the torque transmission capacity between the main shaft and the planet carrier.

Description of drawings

Fig. 1 is the schematic diagram of the planet carrier connection structure in the prior art;

2 is a schematic diagram of a planet carrier connection structure according to a specific embodiment of the present invention;

FIG. 3 is a schematic diagram of the main shaft in the planet carrier connection structure according to the specific embodiment of the present invention.

In Figure 1:

1', the locking disc; 2', the connecting part; 3', the main shaft.

In Figure 2-Figure 3:

1. Connecting part; 12. Resisting hole; 14. Step; 2. Resisting piece; 21. Weight reduction hole; 3. Locking disc; 31. Outer disc; 32. Inner disc; 100. Spindle; 101. Connecting hole; 102. Axial groove.

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only the present invention. Some examples, but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, unless otherwise expressly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

The technical solution of the planet carrier connection structure provided by the present invention will be described below with reference to the accompanying drawings and through specific embodiments.

This embodiment provides a planet carrier connection structure, which is used to connect the planet carrier and the main shaft 100. As shown in FIG. 2, the planet carrier connection structure includes a connection part 1 and a locking disk 3 arranged on the planet carrier, The main shaft 100 is provided with a connection hole 101, the main shaft 100 is sleeved on the connection part 1 through the connection hole 101, the elastic modulus of the main shaft 100 is smaller than the elastic modulus of the connection part 1, and the locking disk 3 is sleeved on the main shaft 100, and The main shaft 100 is locked and squeezed toward the connection part 1, so that the main shaft 100 is pressed against the connection part 1, so as to realize the torque transmission between the main shaft 100 and the planet carrier. With the above structure, since the elastic modulus of the main shaft 100 is smaller than the elastic modulus of the connecting portion 1 of the planet carrier, when the main shaft 100 is pressed by the locking plate 3, it will deform and press the connecting portion 1 of the planet carrier, which is beneficial to increase the The contact pressure between the main shaft 100 and the connecting portion 1 of the planet carrier can improve the torque transmission capability between the main shaft 100 and the planet carrier.

As shown in FIG. 3 , preferably, the part where the main shaft 100 is sleeved with the connecting part 1 is provided with an axial groove 102 . It is easy to produce radial deformation and squeeze the connecting part 1, thereby increasing the contact pressure between the main shaft 100 and the connecting part 1, which is beneficial to improve the torque transmission capacity between the main shaft 100 and the planet carrier. More preferably, a plurality of axial grooves 102 are provided, and the plurality of axial grooves 102 are evenly distributed at equal intervals along the circumferential direction of the main shaft 100, so that the rigidity of the part where the main shaft 100 is sleeved with the connecting portion 1 can be uniformly reduced, so that the main shaft 100 can be uniformly reduced. The contact pressure between 100 and the connecting portion 1 is uniformly distributed along the circumferential direction of the main shaft 100 .

In this embodiment, a step 14 is formed on the outer peripheral wall of the connecting portion 1 , and the connecting hole 101 is sleeved on the small diameter section of the step 14 . When the main shaft 100 is connected to the connecting portion 1 , the main shaft 100 can touch the Positioning on the stepped surface is helpful for the connection and positioning of the main shaft 100 and the connecting portion 1 .

Preferably, the connecting portion 1 is made of QT700, that is, the connecting portion 1 is made of QT700, so that the planet carrier has a high elastic modulus and high rigidity, and is not easily deformed when subjected to external forces. The main shaft 100 is made of QT400, that is, the main shaft 100 is made of QT400, so that the main shaft 100 has a small elastic modulus and low rigidity, and is easily deformed when subjected to external forces. When the main shaft 100 is sleeved on the connecting part 1 , under the locking action of the locking plate 3 , the main shaft 100 is pressed by the locking plate 3 towards the connecting part 1 and deformed, so that the main shaft 100 is tightly pressed on the connecting part 1 . , which is beneficial to increase the contact pressure between the main shaft 100 and the connecting portion 1 , thereby improving the torque transmission capability of the planet carrier connection structure.

In this embodiment, the planet carrier connecting structure further includes a resisting member 2 , a resisting hole 12 is formed on the connecting portion 1 , and the resisting member 2 is placed in the resisting hole 12 and resists the inner wall of the resisting hole 12 , so that the connecting part 1 is clamped between the main shaft 100 and the abutting member 2, and the abutting member 2 is used to support the abutting hole 12 of the connecting part 1, which further improves the rigidity of the connecting part 1 so that it is not easily deformed, thereby ensuring the main shaft. 100 and the contact pressure between the connecting part 1.

Preferably, the abutting member 2 is located at the small diameter section of the step 14 and is directly opposite the main shaft 100 and the socket part of the connecting part 1, and the abutting member 2 is directly opposite to the main shaft 100 and the socket part of the connecting part 1, so that the main shaft 100 and the socket part of the connecting part 1 are directly opposite 100 and the socket part of the connecting part 1 are clamped by the locking plate 3 and the abutting member 2 , which further ensures the contact pressure between the main shaft 100 and the connecting part 1 . More preferably, the axial length of the abutting member 2 is equal to the length of the main shaft 100 and the sleeved portion of the connecting portion 1 , so that the abutting member 2 can support all the sleeved portions of the main shaft 100 and the connecting portion 1 . , which is beneficial to ensure the stability of the contact pressure between the main shaft 100 and the connecting portion 1 and improve the stability of the torque transmission between the main shaft 100 and the planet carrier.

In this embodiment, the resisting member 2 is set in a cylindrical shape, and the outer peripheral wall surface of the resisting member 2 abuts on the inner wall of the resisting hole 12 , which increases the abutting area between the resisting member 2 and the resisting hole 12 . The stability of the contact pressure between the main shaft 100 and the connecting portion 1 is further ensured, and the stability of the torque transmission between the main shaft 100 and the planet carrier is improved.

Preferably, a weight-reducing hole 21 is formed on the resisting member 2, and the weight-reducing hole 21 is set as a through hole, which can remove part of the material on the resisting member 2, which is not only conducive to reducing the weight of the resisting member 2, but also reducing the resistance Manufacturing cost of holder 2. Specifically, the central axis of the weight-reducing hole 21 is set to coincide with the central axis of the connecting portion 1, so that the mass of the abutting member 2 can be evenly distributed around its own central axis (ie, the central axis of the connecting portion 1). It is beneficial to avoid the uneven moment of inertia that affects the transmission of torque. In other embodiments, the weight reduction holes 21 may also be provided in multiple numbers, and the multiple weight reduction holes 21 are evenly distributed on the same circumferential surface with the central axis of the connecting portion 1 as the center, so that the mass of the abutting member 2 can be equal to The central axis of itself (ie the central axis of the connecting portion 1 ) is evenly distributed at the center, which can also avoid the generation of uneven rotational inertia and affect the transmission of torque.

More preferably, the resisting member 2 is set as a steel member, that is, the resisting member 2 is made of metal steel, so that the resisting member 2 has a strong supporting capacity. It can be understood that the specific model of the steel used for the abutting member 2 is not limited in this embodiment, and those skilled in the art can select according to actual needs.

In this embodiment, the locking disc 3 includes an outer disc 31 and an inner disc 32, the outer disc 31 and the inner disc 32 are both arranged in a ring shape, the inner disc 32 is slidably arranged on the inner ring surface of the outer disc 31, and the inner disc 32 is axially connected to the outer disc 31 through bolts. on the outer disk 31, and can slide axially along the inner ring surface of the outer disk 31 under the action of the bolt. The cross-sectional shape of the inner disk 32 is wedge-shaped. When the inner disk 32 is inserted into the inner ring of the outer disk 31 in the axial direction under the action of the bolt, the inner diameter of the locking disk 3 will be reduced, so that the locking disk 3 is locked and squeezes the main shaft 100, so that the main shaft is locked. 100 deforms and squeezes the connecting portion 1 , so that contact pressure is generated between the main shaft 100 and the connecting portion 1 for connection, and finally the torque transmission between the main shaft 100 and the planet carrier is realized.

Preferably, the inner disk 32 is provided with a connecting table 321, and the connecting table 321 is axially connected to the end surface of the outer disk 31 through bolts, so that the inner disk 32 can slide axially under the action of the connecting table 321 and the bolts and be inserted into the inner surface of the outer disk 31. The ring locks the locking disc 3 and squeezes the main shaft 100 to realize the locking function.

More preferably, the inner ring surface of the outer disk 31 is set as an inclined surface and is parallel to the wedge-shaped surface of the inner disk 32, which is beneficial to avoid a gap between the inner disk 32 and the outer disk 31 when the inner disk 32 is inserted into the inner ring of the outer disk 31, which is conducive to improving the performance of the inner disk 31. The locking strength of the locking disc 3 .

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the embodiments of the present invention. For those of ordinary skill in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. There is no need and cannot be exhaustive of all implementations here. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (10)

1. A planet carrier connection structure for connecting the planet carrier and the main shaft (100), characterized in that, comprising: A connecting part (1), the connecting part (1) is arranged on the planet carrier, a connecting hole (101) is opened on the main shaft (100), and the main shaft (100) passes through the connecting hole (101) sleeved on the connecting portion (1), the elastic modulus of the main shaft (100) is smaller than the elastic modulus of the connecting portion (1); A resisting piece (2), a resisting hole (12) is formed on the connecting portion (1), and the resisting piece (2) is placed in the resisting hole (12) and resists against the resisting piece on the inner wall of the holding hole (12), so that the connecting portion (1) is clamped between the main shaft (100) and the abutting member (2); A locking disc (3) is sleeved on the main shaft (100), and the main shaft (100) is pressed towards the connecting part (1). 2 . The planet carrier connection structure according to claim 1 , wherein a plurality of axial grooves ( 102 ) are provided in the part where the main shaft ( 100 ) is sleeved with the connecting portion ( 1 ), and a plurality of The axial grooves (102) are evenly distributed at equal intervals along the circumference of the main shaft (100). 3 . The planet carrier connection structure according to claim 1 , wherein a step ( 14 ) is formed on the outer peripheral wall of the connection portion ( 1 ), and the connection hole ( 101 ) is sleeved on the step ( 3 . 14) on the small diameter section. 4. The planet carrier connection structure according to claim 3, wherein the abutting member (2) is located at the small diameter section of the step (14), and is connected to the main shaft (100) and the connection The socket part of the part (1) is facing. 5 . The planet carrier connection structure according to claim 1 , wherein the axial length of the abutting member ( 2 ) is the same as the length of the main shaft ( 100 ) and the socket portion of the connecting portion ( 1 ). 6 . equal length. 6 . The planet carrier connection structure according to claim 1 , wherein the resisting member ( 2 ) is provided in a cylindrical shape, and the outer peripheral wall surface of the resisting member ( 2 ) resists the resisting hole. 7 . (12) on the inner wall. 7 . The planet carrier connection structure according to claim 1 , wherein a weight-reducing hole ( 21 ) is provided on the abutting member ( 2 ), and the central axis of the weight-reducing hole ( 21 ) is set to align with the The central axes of the connecting parts (1) are coincident. 8 . The planet carrier connection structure according to claim 1 , wherein the locking disk ( 3 ) comprises an outer disk ( 31 ) and an inner disk ( 32 ), and the inner disk ( 32 ) is axially slidably arranged on the On the inner ring surface of the outer disk (31), the cross-sectional shape of the inner disk (32) is wedge-shaped, and when the inner disk (32) is inserted between the outer disk (31) and the main shaft (100), the lock The shrink disk (3) can squeeze and lock the main shaft (100). 9 . The planet carrier connection structure according to claim 8 , wherein the inner ring surface of the outer disk ( 31 ) is set as an inclined surface and is parallel to the wedge-shaped surface of the inner disk ( 32 ). 10 . 10 . The planet carrier connection structure according to claim 8 , wherein a connecting platform ( 321 ) is provided on the inner disk ( 32 ), and the connecting platform ( 321 ) is axially connected to the outer disk ( 10 . 10 . 31) of the end face.

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