A planet carrier connection structure

Abstract

The present invention relates to the technical field of planetary gears, and discloses a planetary carrier connection structure for connecting a planetary carrier and a main shaft, comprising: a connection part, the connection part is arranged on the planetary carrier, a connection hole is provided on the main shaft, the main shaft is sleeved on the connection part through the connection hole, and the elastic modulus of the main shaft is set to be smaller than the elastic modulus of the connection part; a supporting member, the connection part is provided with a supporting hole, the supporting member is placed in the supporting hole and abuts against the inner wall of the supporting hole, so that the connection part is clamped between the main shaft and the supporting member; a locking disk, the locking disk is sleeved on the main shaft, and presses the main shaft toward the connection part. Through the above structure, the planetary carrier connection structure can increase the contact pressure between the main shaft and the planetary carrier, thereby improving the torque transmission capacity between the main shaft and the planetary carrier.

Description

Technical Field

[0001] The present invention relates to the technical field of planetary gears, and in particular to a planetary carrier connection structure. Background Art

[0002] In a planetary gearbox, in order to transmit the torque transmitted from the main shaft to the planet carrier, the planet carrier and the main shaft of the wind power gearbox are generally connected through a locking disk.

[0003] Usually, if Figure 1 As shown, the locking plate 1' is located outside the connection part 2' of the planet carrier, and the main shaft 3' is located inside the connection part 2' of the planet carrier, that is, the locking plate 1' tightens the connection part 2' of the planet carrier and presses it onto the main shaft 3'. The pressure generated by the locking plate 1' will be transmitted to the contact surface between 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 achieve the connection between the main shaft 3' and the connection part 2' of the planet carrier, thereby achieving the purpose of transmitting the torque of the main shaft 3' to the planet carrier.

[0004] At present, the commonly used material for the planetary carrier is QT700, and the commonly used material for the main shaft 3' is steel or QT400. Since the elastic modulus of QT700 is higher than that of QT400, under the pressure of the locking plate 1', the connecting portion 2' of the planetary carrier is not easy to deform radially (because the rigidity of the planetary carrier is relatively large), while the main shaft 3' is easy to deform radially (because the rigidity of the main shaft 3' is relatively small), which will eventually cause the pressure transmitted to the contact surface of the connecting portion 2' of the main shaft 3' and the planetary carrier to be relatively small, resulting in poor torque transmission capacity between the main shaft 3' and the connecting portion 2' of the planetary carrier. Summary of the invention

[0005] An object 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.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A planetary carrier connection structure, which is used to connect the planetary carrier and the main shaft, comprises: a connecting part, which is arranged on the planetary carrier, and a connecting hole is opened on the main shaft, and the main shaft is sleeved on the connecting part through the connecting hole, and the elastic modulus of the main shaft is smaller than the elastic modulus of the connecting part; a supporting member, which is opened on the connecting part, and the supporting member is placed in the supporting hole and abuts against the inner wall of the supporting hole, so that the connecting part is clamped between the main shaft and the supporting member; a locking disk, which is sleeved on the main shaft and presses the main shaft toward the connecting part.

[0008] As a preferred solution of the planet carrier connection structure, a portion where the main shaft and the connection portion are sleeved 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.

[0009] As a preferred solution of the planet carrier connection structure, a step is provided on the outer peripheral wall surface of the connection portion, and the connection hole is sleeved on the small diameter section of the step.

[0010] As a preferred solution of the planet carrier connection structure, the abutment is located at the small diameter section of the step and is directly opposite to the sleeve connection part of the main shaft and the connection part.

[0011] As a preferred solution of the planet carrier connection structure, the axial length of the abutment member is equal to the length of the sleeve connection portion of the main shaft and the connection portion.

[0012] As a preferred solution of the planet carrier connection structure, the abutment member is configured to be cylindrical, and the outer peripheral wall surface of the abutment member abuts against the inner wall of the abutment hole.

[0013] As a preferred solution of the planet carrier connection structure, a weight-reducing hole is provided on the supporting member, and a central axis of the weight-reducing hole is arranged to coincide with a central axis of the connecting portion.

[0014] As a preferred solution of the planet carrier connection structure, the locking plate comprises an outer plate and an inner plate, the inner plate is axially slidably arranged on the inner ring surface of the outer plate, the cross-sectional shape of the inner plate is wedge-shaped, and when the inner plate is inserted between the outer plate and the main shaft, the locking plate can squeeze and lock the main shaft. As a preferred solution of the planet carrier connection structure, the inner ring surface of the outer plate is set as an inclined surface and is parallel to the wedge-shaped surface of the inner plate.

[0015] As a preferred solution of the planet carrier connection structure, a connecting platform is provided on the inner disk, and the connecting platform is axially connected to the end surface of the outer disk by bolts.

[0016] Beneficial effects of the present invention:

[0017] The present invention provides a planetary carrier connection structure, which is used to connect the planetary carrier with the main shaft. The planetary carrier connection structure includes a connection part, a support part and a locking disk. The connection part is arranged on the planetary carrier, a connection hole is provided on the main shaft, the main shaft is sleeved on the connection part through the connection hole, the elastic modulus of the main shaft is set to be smaller than the elastic modulus of the connection part, a support hole is provided on the connection part, the support part is placed in the support hole and is supported on the inner wall of the support hole, so that the connection part is clamped between the main shaft and the support part, the locking disk is sleeved on the main shaft and locks and squeezes the main shaft in the direction of the connection part, so that the main shaft is pressed against the connection part, thereby realizing the torque transmission between the main shaft and the planetary carrier. In the above structure, since the elastic modulus of the main shaft is smaller than the elastic modulus of the connection part of the planetary carrier, when the main shaft is squeezed by the locking disk, it will deform and press the connection part of the planetary carrier, increasing the contact pressure between the connection part of the main shaft and the planetary carrier, thereby improving the torque transmission capacity between the main shaft and the planetary carrier. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a planet carrier connection structure in the prior art;

[0019] Figure 2 is a schematic diagram of a planet carrier connection structure according to a specific embodiment of the present invention;

[0020] Figure 3 It is a schematic diagram of the main shaft in the planetary carrier connection structure described in the specific embodiment of the present invention.

[0021] Figure 1 middle:

[0022] 1', locking disc; 2', connecting part; 3', main shaft.

[0023] Figure 2-Figure 3 middle:

[0024] 1. Connecting part; 12. Supporting hole; 14. Step; 2. Supporting piece; 21. Lightening hole; 3. Locking plate; 31. Outer plate; 32. Inner plate; 100. Main shaft; 101. Connecting hole; 102. Axial groove. DETAILED DESCRIPTION

[0025] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] The technical solution of the planet carrier connection structure provided by the present invention is described below with reference to the accompanying drawings and through specific embodiments.

[0029] This embodiment provides a planet carrier connection structure, which is used to connect the planet carrier and the main shaft 100. Figure 2 As shown, the planet carrier connection structure includes a connection part 1 and a locking plate 3 arranged on the planet carrier, a connection hole 101 is opened on the main shaft 100, and 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. The locking plate 3 is sleeved on the main shaft 100, and the main shaft 100 is locked and squeezed in the direction of the connection part 1, so that the main shaft 100 is pressed against the connection part 1, thereby realizing the torque transmission between the main shaft 100 and the planet carrier. Through the above structure, since the elastic modulus of the main shaft 100 is smaller than the elastic modulus of the connection part 1 of the planet carrier, when the main shaft 100 is squeezed by the locking plate 3, it will deform and press the connection part 1 of the planet carrier, which is conducive to increasing the contact pressure between the main shaft 100 and the connection part 1 of the planet carrier, and can improve the torque transmission capacity between the main shaft 100 and the planet carrier.

[0030] like Figure 3As shown, preferably, the portion where the main shaft 100 and the connecting portion 1 are sleeved is provided with an axial groove 102, and the axial groove 102 is used to reduce the radial stiffness of the main shaft 100, so that the main shaft 100 is easily deformed radially when being squeezed by the locking disk 3 and squeezes the connecting portion 1, thereby increasing the contact pressure between the main shaft 100 and the connecting portion 1, which is beneficial to improving the torque transmission capacity between the main shaft 100 and the planetary 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 circumference of the main shaft 100, so that the stiffness of the portion where the main shaft 100 and the connecting portion 1 are sleeved can be evenly reduced, so that the contact pressure between the main shaft 100 and the connecting portion 1 is evenly distributed along the circumference of the main shaft 100.

[0031] In this embodiment, a step 14 is provided on the outer wall surface of the connecting part 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 part 1, the main shaft 100 can be positioned by abutting its end against the step surface, which helps to connect and position the main shaft 100 with the connecting part 1.

[0032] Preferably, the connecting part 1 is a QT700 part, that is, the connecting part 1 is made of QT700, so that the elastic modulus of the planetary frame is high, the rigidity is large, and it is not easy to deform when subjected to external forces. The main shaft 100 is a QT400 part, that is, the main shaft 100 is made of QT400, so that the elastic modulus of the main shaft 100 is small, the rigidity is small, and it is easy to deform when subjected to external forces. When the main shaft 100 is sleeved on the connecting part 1, under the locking action of the locking disk 3, the main shaft 100 is pressed by the locking disk 3 toward the connecting part 1 and deformed, so that the main shaft 100 is pressed tightly against the connecting part 1, which is conducive to increasing the contact pressure between the main shaft 100 and the connecting part 1, thereby improving the torque transmission capacity of the planetary frame connection structure.

[0033] In this embodiment, the planetary carrier connection structure also includes a supporting member 2, and a supporting hole 12 is opened on the connecting part 1. The supporting member 2 is placed in the supporting hole 12 and is supported on the inner wall of the supporting hole 12, so that the connecting part 1 is clamped between the main shaft 100 and the supporting member 2. The supporting member 2 is used to support the supporting hole 12 of the connecting part 1, further improving the rigidity of the connecting part 1 so that it is not easy to deform, thereby ensuring the contact pressure between the main shaft 100 and the connecting part 1.

[0034] Preferably, the abutment 2 is located at the small diameter section of the step 14 and is directly opposite to the sleeve connection portion of the main shaft 100 and the connection portion 1. The abutment 2 is directly opposite to the sleeve connection portion of the main shaft 100 and the connection portion 1, so that the sleeve connection portion of the main shaft 100 and the connection portion 1 is clamped by the locking plate 3 and the abutment 2, further ensuring the contact pressure between the main shaft 100 and the connection portion 1. More preferably, the axial length of the abutment 2 is equal to the length of the sleeve connection portion of the main shaft 100 and the connection portion 1, so that the abutment 2 can support the entire sleeve connection portion of the main shaft 100 and the connection portion 1, which is conducive to ensuring the stability of the contact pressure between the main shaft 100 and the connection portion 1 and improving the stability of the torque transmission between the main shaft 100 and the planetary carrier.

[0035] In this embodiment, the supporting member 2 is set to be cylindrical, and the outer peripheral wall of the supporting member 2 is supported on the inner wall of the supporting hole 12, which increases the supporting area between the supporting member 2 and the supporting hole 12, can further ensure the stability of the contact pressure between the main shaft 100 and the connecting part 1, and improve the stability of the torque transmission between the main shaft 100 and the planetary carrier.

[0036] Preferably, a weight-reducing hole 21 is provided on the supporting member 2, and the weight-reducing hole 21 is set as a through hole, which can remove part of the material on the supporting member 2, which is not only conducive to reducing the weight of the supporting member 2, but also can reduce the manufacturing cost of the supporting member 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 supporting member 2 itself can be evenly distributed around its own central axis (i.e., the central axis of the connecting portion 1), which is conducive to avoiding the generation of uneven moment of inertia and affecting the transmission of torque. In other embodiments, the weight-reducing hole 21 can also be set to be multiple, and the multiple weight-reducing holes 21 are evenly distributed on the same circumferential surface around the central axis of the connecting portion 1, so that the mass of the supporting member 2 itself can be evenly distributed around its own central axis (i.e., the central axis of the connecting portion 1), which can also avoid the generation of uneven moment of inertia and affect the transmission of torque.

[0037] More preferably, the abutment 2 is configured as a steel member, that is, the abutment 2 is made of metal steel, so that the supporting capacity of the abutment 2 is strong. It is understandable that the specific type of steel used for the abutment 2 is not limited in this embodiment, and those skilled in the art can select it according to actual needs.

[0038] In this embodiment, the locking disk 3 includes an outer disk 31 and an inner disk 32, both of which are set in an annular shape, and the inner disk 32 is slidably set on the inner ring surface of the outer disk 31. The inner disk 32 is axially connected to the outer disk 31 by bolts, and can slide axially along the inner ring surface of the outer disk 31 under the action of the bolts. The cross-sectional shape of the inner disk 32 is a wedge shape. When the inner disk 32 is axially inserted into the inner ring of the outer disk 31 under the action of the bolts, the inner diameter of the locking disk 3 will be reduced, so that the locking disk 3 locks and squeezes the main shaft 100, so that the main shaft 100 is deformed and squeezes the connecting part 1, so that the contact pressure is generated between the main shaft 100 and the connecting part 1 to connect, and finally the torque transmission between the main shaft 100 and the planet carrier is realized.

[0039] Preferably, a connecting platform 321 is provided on the inner disk 32, and the connecting platform 321 is axially connected to the end surface of the outer disk 31 by bolts, so that the inner disk 32 can slide axially under the action of the connecting platform 321 and the bolts and be inserted into the inner ring of the outer disk 31 so that the locking disk 3 is locked and squeezes the main shaft 100, thereby realizing the locking function.

[0040] 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 the formation of 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, and is beneficial to improve the locking strength of the locking disk 3.

[0041] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A planet carrier connection structure, used for connecting a planet carrier and a main shaft (100), characterized in that: include: A connecting portion (1), the connecting portion (1) being arranged on the planet carrier, the main shaft (100) being provided with a connecting hole (101), the main shaft (100) being sleeved on the connecting portion (1) through the connecting hole (101), and the elastic modulus of the main shaft (100) being smaller than the elastic modulus of the connecting portion (1); A supporting member (2), wherein the connecting portion (1) is provided with a supporting hole (12), and the supporting member (2) is placed in the supporting hole (12) and is supported on the inner wall of the supporting hole (12), so that the connecting portion (1) is sandwiched between the main shaft (100) and the supporting member (2); A locking disk (3), wherein the locking disk (3) is sleeved on the main shaft (100) and presses the main shaft (100) toward the connecting portion (1); The axial length of the abutment member (2) is equal to the length of the sleeve connection portion between the main shaft (100) and the connection portion (1).

2. The planet carrier connection structure according to claim 1, characterized in that: The portion where the main shaft (100) and the connecting portion (1) are sleeved is provided with a plurality of axial grooves (102), and the plurality of 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, characterized in that: A step (14) is provided on the outer peripheral wall surface of the connecting portion (1), and the connecting hole (101) is sleeved on the small diameter section of the step (14).

4. The planet carrier connection structure according to claim 3, characterized in that: The abutment member (2) is located at the small diameter section of the step (14) and is directly opposite to the sleeve connection portion of the main shaft (100) and the connection portion (1).

5. The planet carrier connection structure according to claim 1, characterized in that: The abutting piece (2) is configured to be cylindrical, and the outer peripheral wall surface of the abutting piece (2) abuts against the inner wall of the abutting hole (12).

6. The planet carrier connection structure according to claim 1, characterized in that: The supporting member (2) is provided with a weight-reducing hole (21), and the central axis of the weight-reducing hole (21) is arranged to coincide with the central axis of the connecting portion (1).

7. The planet carrier connection structure according to claim 1, characterized in that: The locking disk (3) comprises an outer disk (31) and an inner disk (32); the inner disk (32) is axially slidably arranged on the inner ring surface of the outer disk (31); the cross-sectional shape of the inner disk (32) is wedge-shaped; when the inner disk (32) is inserted between the outer disk (31) and the main shaft (100), the locking disk (3) can squeeze and lock the main shaft (100).

8. The planet carrier connection structure according to claim 7, characterized in that: The inner ring surface of the outer disk (31) is arranged as an inclined surface and is parallel to the wedge-shaped surface of the inner disk (32).

9. The planet carrier connection structure according to claim 7, characterized in that: A connecting platform (321) is provided on the inner disk (32), and the connecting platform (321) is axially connected to the end surface of the outer disk (31) via bolts.

Images