Torque transmission device, gearbox and wind power generation equipment

Abstract

The utility model relates to the technical field of transmission, and provides a torque transmission device, a gearbox and wind power generation equipment. The torque transmission device comprises a first transmission element and a second transmission element which are connected to transmit torque, the second transmission element is provided with a connecting part, and the connecting part is sleeved with the first transmission element; the radial fastener is in fastening connection with the first transmission element and the first end of the connecting part; the axial fastener is in fastening connection with the first transmission element and the second end of the connecting part; the multiple radial fasteners and the multiple axial fasteners are distributed in the circumferential direction at intervals. The first transmission element is fixedly connected with the two ends of the connecting part through the radial fastening piece and the axial fastening piece respectively, so that torque transmission between the first transmission element and the second transmission element is effectively transmitted through the radial fastening piece and the axial fastening piece in two paths respectively, and spline connecting sections do not need to be arranged on the two transmission elements. The material of the transmission element can be effectively reduced, the size of the transmission element is reduced, and the processing cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to transmission technical field, concretely relates to torque transmission device, gear box and wind power equipment. BACKGROUND

[0002] Torque transmission device is used for transmitting torque, and is widely used in various mechanical systems. For example, in wind power equipment, the power generated by a wind wheel under the action of wind is transmitted to a generator through a torque transmission device, so that the generator reaches the speed requirement.

[0003] At present, the connection between transmission elements in the torque transmission device usually adopts spline connection. For example, in the torque transmission device applied to wind power equipment, the connection mode between the upper-stage sun gear and the lower-stage planet carrier is that the end of the upper-stage sun gear extends a section of outer spline, which is inserted into the inner spline of the lower-stage planet carrier to form spline connection. The spline connection causes the transmission elements to use more materials, especially the sun gear shaft material is wasted, the weight is large, and the cost is high.

[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the utility model, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. CONTENT OF THE UTILITY MODEL

[0005] Therefore, the utility model provides a torque transmission device, a gear box and wind power equipment, which can reduce the cost and realize the rigid connection between transmission elements to transmit torque.

[0006] According to one aspect of the utility model, a torque transmission device is provided, which comprises first and second transmission elements connected to transmit torque, wherein the second transmission element is provided with a connecting part, the first transmission element is sleeved on the connecting part, the torque transmission device further comprises a radial fastener fastening the first end of the first transmission element and the first end of the connecting part, and an axial fastener fastening the second end of the first transmission element and the second end of the connecting part, wherein the radial fastener and the axial fastener respectively comprise a plurality of circumferentially spaced.

[0007] In some embodiments, the radial fastener passes through the first end of the first transmission element and extends into the first end of the connecting part.

[0008] In some embodiments, the radial fastener is a pin.

[0009] In some embodiments, the axial fastener passes through the second end of the connecting part and extends into the second end of the first transmission element.

[0010] In some embodiments, the axial fastener is a screw.

[0011] In some embodiments, a friction pad is arranged between the axial fastener and the mating end face.

[0012] In some embodiments, the axial fastener and the radial fastener are respectively uniformly distributed in the circumferential direction.

[0013] In some embodiments, a middle section of the first transmission element is transitionally connected with a middle section of the connecting part; wherein the middle section of the first transmission element is located between a first end and a second end of the first transmission element, and the middle section of the connecting part is located between a first end and a second end of the connecting part.

[0014] In some embodiments, the first transmission element is a sun gear of an upper planetary gear train, and the second transmission element is a planet carrier of a lower planetary gear train.

[0015] In some embodiments, the first end of the first transmission element and the first end of the connecting part are close to a power input side or a low speed side of the torque transmission device, and the second end of the first transmission element and the second end of the connecting part are close to a power output side or a high speed side of the torque transmission device.

[0016] According to another aspect of the present application, a gear box is provided, which is configured with the torque transmission device according to any of the above embodiments.

[0017] According to another aspect of the present application, a wind power generation device is provided, which is configured with the torque transmission device according to any of the above embodiments, and the torque transmission device is connected between a wind wheel and a generator; or the wind power generation device is configured with the gear box according to the above embodiments, and the gear box is connected between the wind wheel and the generator.

[0018] The present application has at least the following beneficial effects compared with the prior art:

[0019] The first transmission element is sleeved on the connecting portion of the second transmission element, and the first transmission element is supported by the connecting portion, thereby improving rigidity. The first transmission element is fastened to the two ends of the connecting portion through radial fasteners and axial fasteners, respectively, so that torque transmission between the first transmission element and the second transmission element is realized through two paths, i.e., the radial fasteners and the axial fasteners. Through the radial fasteners, torsional deformation between the first transmission element and the second transmission element can be avoided. Through the axial fasteners, axial contact between the first transmission element and the second transmission element can be increased to facilitate torque transmission. The rigid connection between the transmission elements is realized through the radial fasteners and the axial fasteners to transmit torque, without the need to provide a spline connecting section on the two transmission elements, so that the material of the transmission elements can be effectively reduced, the volume of the transmission elements can be reduced, and the processing cost can be reduced.

[0020] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings incorporated by reference in the specification and forming a part thereof illustrate embodiments consistent with the present utility model and together with the description serve to explain the principles of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0022] Fig. 1 And Fig. 2 A cross-sectional structure schematic diagram of a torque transmission device in an embodiment of the present utility model is shown.

[0023] Fig. 3 A three-dimensional structure schematic diagram of a torque transmission device in an embodiment of the present utility model is shown. DETAILED DESCRIPTION

[0024] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations, however, can be implemented in many different forms and should not be construed as limited to the implementations set forth herein. Rather, these implementations are provided as example implementations so that this present utility model will be thorough and complete, and will fully convey the spirit of example implementations to those skilled in the art.

[0025] The accompanying drawings are merely illustrative and are not necessarily drawn to scale. Like reference numerals in the drawings denote like or similar structures, so repeated description thereof will be omitted.

[0026] The terms "first", "second", and similar terms used in the description are not intended to denote any order, quantity, or importance, but are only used to distinguish different components. The term "a plurality of" means two or more, unless otherwise explicitly specified and limited. In addition, in the description of the present application, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium.

[0027] It should be noted that the features of the embodiments of the present application and different embodiments can be combined with each other without conflict.

[0028] Fig. 1 And Fig. 2 The cross-sectional structure of the torque transmission device is shown, Fig. 3 The three-dimensional structure of the torque transmission device is shown. In combination with Figs. 1 to 3 The torque transmission device provided by the embodiments of the present application comprises:

[0029] The first transmission element 100 and the second transmission element 200 are connected to transmit torque, the second transmission element 200 is provided with a connecting portion 210, and the first transmission element 100 is sleeved on the connecting portion 210; a radial fastener 300 is used to fasten and connect the first end 100a of the first transmission element 100 and the first end 210a of the connecting portion 210; an axial fastener 400 is used to fasten and connect the second end 100b of the first transmission element 100 and the second end 210b of the connecting portion 210; wherein the radial fastener 300 and the axial fastener 400 respectively comprise a plurality of.

[0030] The connecting portion 210 can be a flange portion, or other suitable structure for sleeving the first transmission element 100, capable of bearing mechanical load and achieving connection strength. The first transmission element 100 is sleeved on the connecting portion 210 and supported by the connecting portion 210, thereby improving rigidity.

[0031] The first transmission element 100 is fastened to both ends of the connecting part 210 through the radial fastener 300 and the axial fastener 400, respectively, so that the torque transmission between the first transmission element 100 and the second transmission element 200 is realized through two paths, i.e., the radial fastener 300 and the axial fastener 400. The load of each torque transmission path can be adjusted by the matching parameters of the radial fastener 300 / axial fastener 400 and the first transmission element 100 and the connecting part 210. For example, the torque transmission capacity between the first transmission element 100 and the second transmission element 200 through the radial fastener 300 is adjusted by adjusting the diameter, distribution, matching tightness, friction coefficient and other parameters between the radial fastener 300 and the first transmission element 100 and the connecting part 210. Similarly, the torque transmission capacity between the first transmission element 100 and the second transmission element 200 through the axial fastener 400 is adjusted by adjusting the length, distribution, matching tightness, friction coefficient and other parameters between the axial fastener 400 and the first transmission element 100 and the connecting part 210.

[0032] Through the radial fastener 300, torsional deformation between the first transmission element 100 and the second transmission element 200 can be avoided; through the axial fastener 400, axial contact between the first transmission element 100 and the second transmission element 200 can be increased to facilitate torque transmission.

[0033] The rigid connection between the transmission elements is realized by the radial fastener 300 and the axial fastener 400 to transmit torque, without the need to provide a spline connection section on the two transmission elements, which can effectively reduce the material of the transmission elements, reduce the volume of the transmission elements, and reduce the processing cost. In actual products, the first transmission element 100 in the torque transmission device is a gear piece, which is usually a forged piece made of alloy steel; the second transmission element 200 is usually a cast iron piece, and the cost of the first transmission element 100 is higher than that of the second transmission element 200. The rigid connection between the transmission elements is realized by the radial fastener 300 and the axial fastener 400 to transmit torque, which can effectively reduce the material of the first transmission element 100 to reduce the overall cost of the torque transmission device by significantly reducing the weight of the high-cost piece.

[0034] In some embodiments, the first end 100a of the first transmission element 100 is sleeved outside the first end 210a of the connecting part 210, the radial fastener 300 passes through the first end 100a of the first transmission element 100 and extends into the first end 210a of the connecting part 210, so as to achieve the fastening connection between the first end 100a of the first transmission element 100 and the first end 210a of the connecting part 210. The radial fastener 300 can be a pin, for example, a cylindrical pin, but is not limited thereto. In other implementations, the radial fastener 300 can also be a rivet or other suitable component capable of achieving fastening connection.

[0035] In some embodiments, the second end 210b of the connecting part 210 protrudes in the radial direction relative to the first end 210a thereof, so that the end face of the second end 100b of the first transmission element 100 abuts against the end face of the second end 210b of the connecting part 210, achieving positioning support of the first transmission element 100 and facilitating the arrangement of the axial fastener 400. The axial fastener 400 can pass through the second end 210b of the connecting part 210 and extend into the second end 100b of the first transmission element 100, achieving the fastening connection between the second end 100b of the first transmission element 100 and the second end 210b of the connecting part 210. In some implementations, according to different design requirements, corresponding structures can also be arranged at the second end 100b of the first transmission element 100 to enable the axial fastener 400 to pass through the second end 100b of the first transmission element 100 and extend into the second end 210b of the connecting part 210 to achieve fastening connection. The axial fastener 400 can be a threaded member, for example, a bolt or a stud, but is not limited thereto. In other implementations, the axial fastener 400 can also be a rivet or other suitable component capable of achieving fastening connection. In the case where the axial fastener 400 is a threaded member, in order to increase friction and facilitate torque transmission, a friction gasket can be arranged between the axial fastener 400 and the mating end face, specifically, a friction gasket can be arranged between the axial fastener 400 and the end face of the second end 210b of the connecting part 210.

[0036] It should be noted that the first end 100a and the second end 100b of the first transmission element 100 can refer to the opposite two ends of the first transmission element 100; or the first transmission element 100 can be provided with a connecting section cooperating with the connecting part 210, and the first end 100a and the second end 100b can refer to the opposite two ends of the connecting section.

[0037] In some embodiments, the axial fasteners 400 and the radial fasteners 300 are uniformly distributed in the circumferential direction, so that the stress is uniformly distributed, achieving stable torque transmission between the first transmission element 100 and the second transmission element 200. The specific number and distribution interval of the axial fasteners 400 and the radial fasteners 300 can be set as required.

[0038] In some embodiments, the middle section of the first transmission element 100 (between the first end 100a and the second end 100b of the first transmission element 100) and the middle section of the connecting portion 210 (between the first end 210a and the second end 210b of the connecting portion 210) are transitionally fitted. The transitional fit can be a clearance transition fit, an interference transition fit, or between the clearance transition fit and the interference transition fit, which can be set according to design needs. In a preferred case, the middle section of the first transmission element 100 and the middle section of the connecting portion 210 are slightly interference fitted to achieve radial support of the first transmission element 100 through the connecting portion 210.

[0039] In some embodiments, the first transmission element 100 is a sun gear of an upper planetary gear train, and the second transmission element 200 is a planet carrier of a lower planetary gear train. The transmission connection between the upper sun gear and the lower planet carrier is achieved by the radial fastener 300 and the axial fastener 400, which can effectively reduce the material usage of the sun gear shaft, simplify the structure and manufacturing process of the sun gear and the planet carrier, and reduce the volume and weight, thereby saving costs.

[0040] In other embodiments, the torque transmission device can also be applied to the transmission structure between the gear and the transmission shaft.

[0041] In some embodiments, the first transmission element 100 and the second transmission element 200 can be cast iron pieces, but are not limited thereto.

[0042] In the above embodiments, the first end 100a of the first transmission element 100 and the first end 210a of the connecting portion 210 are close to the power input side or the low speed side of the torque transmission device, and the second end 100b of the first transmission element 100 and the second end 210b of the connecting portion 210 are close to the power output side or the high speed side of the torque transmission device. The torque transmission device can be one-way transmission or bidirectional transmission. The connection area of the radial fastener 300 is arranged close to the power input side / low speed side of the torque transmission device, which effectively avoids torsional deformation, and the connection area of the axial fastener 400 is arranged close to the power output side / high speed side of the torque transmission device, which achieves efficient transmission of torque.

[0043] In other implementations, according to design needs, the first end 100a of the first transmission element 100 and the first end 210a of the connecting portion 210 can also be close to the power output side / high speed side of the torque transmission device, and correspondingly, the second end 100b of the first transmission element 100 and the second end 210b of the connecting portion 210 can be close to the power input side / low speed side of the torque transmission device.

[0044] The utility model embodiment further provides a gear box, the gear box is provided with the torque transmission device as any of the above described embodiments. In addition to the form of the gear box, in other embodiments, the torque transmission device can also be formed in other forms, such as integrated in the applied transmission system.

[0045] The utility model embodiment further provides a wind power generation equipment, the wind power generation equipment is provided with the torque transmission device as any of the above described embodiments, and the torque transmission device is integrated in the shell of the wind power generation equipment and is connected between the wind wheel and the generator. Alternatively, the wind power generation equipment is provided with the gear box as described in the above embodiment, and the gear box is connected between the wind wheel and the generator.

[0046] The end of the first transmission element 100 and the second transmission element 200 connected by the radial fastener 300 can be close to the side of the wind wheel to accurately transmit the torque from the wind wheel; the end of the first transmission element 100 and the second transmission element 200 connected by the axial fastener 400 can be close to the side of the generator to realize efficient transmission of torque to the generator.

[0047] The wind power generation equipment connects the first transmission element 100 and the second transmission element 200 by the radial fastener 300 and the axial fastener 400, so that the torque transmission between the first transmission element 100 and the second transmission element 200 is realized by the radial fastener 300 and the axial fastener 400 in two paths, and the torsional deformation is avoided, thereby realizing effective torque transmission between the wind wheel and the generator. The radial fastener 300 and the axial fastener 400 are used to realize the rigid connection between the transmission elements to transmit torque, without the need to set the spline connection section on the two transmission elements, which can effectively reduce the material of the transmission element, reduce the volume of the transmission element and the wind power generation equipment, and reduce the processing cost.

[0048] In a specific implementation, the wind wheel and the generator of the wind power generation equipment can be connected by a multi-stage planetary gear train, wherein the planet carrier of the first-stage planetary gear train is connected to the wind wheel as input, the sun gear of the second-stage planetary gear train is connected to the generator as output or through a parallel output shaft, the sun gear of the first-stage planetary gear train is the first transmission element 100, the planet carrier of the second-stage planetary gear train is the second transmission element 200, and the gear rings of the first-stage planetary gear train and the second-stage planetary gear train are fixed.

[0049] The torque transmission device / gear box of the utility model can also be applied to other transmission systems to realize power transmission, speed change and torque change. For example, it can also be applied to machine tools, vehicles, hydroelectric power generation systems, etc., and can be connected by the radial fastener 300 and the axial fastener 400 to realize stable rigid connection to transmit torque and effectively reduce cost.

[0050] The above is a further detailed description of the present application in combination with specific preferred embodiments, and cannot be deemed to limit the specific implementation of the present application to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, some simple deductions or substitutions can be made without departing from the concept of the present application, and all of them shall be deemed to fall within the protection scope of the present application.

Claims

1. A torque transmission device comprising a first transmission element and a second transmission element connected to transmit torque, characterized in that: the second transmission element is provided with a connecting portion, the first transmission element is sleeved on the connecting portion, and the torque transmission device further comprises: radial fasteners fastening a first end of the first transmission element and a first end of the connecting portion; axial fasteners fastening a second end of the first transmission element and a second end of the connecting portion; wherein the radial fasteners and the axial fasteners are respectively comprised of a plurality of circumferentially spaced ones.

2. The torque transmission device of claim 1, wherein The radial fasteners pass through the first end of the first transmission element and extend into the first end of the connecting portion.

3. The torque transmission device of claim 1, wherein The radial fasteners are pins.

4. The torque transmission device of claim 1, wherein The axial fasteners pass through the second end of the connecting portion and extend into the second end of the first transmission element.

5. The torque transmission device of claim 1, wherein The axial fasteners are threaded members.

6. The torque transmission device of claim 5, wherein A friction pad is provided between the axial fasteners and the mating end faces.

7. The torque transmission device of claim 1, wherein The axial fasteners and the radial fasteners are respectively uniformly distributed in the circumferential direction.

8. The torque transmission device of claim 1, wherein The middle section of the first transmission element is transitionally fitted with the middle section of the connecting portion; wherein the middle section of the first transmission element is located between the first end and the second end of the first transmission element, and the middle section of the connecting portion is located between the first end and the second end of the connecting portion.

9. The torque transmission device of claim 1, wherein The first transmission element is a sun gear of an upper-stage planetary gear train, and the second transmission element is a planet carrier of a lower-stage planetary gear train.

10. A torque transmission device according to any one of claims 1 to 9, characterised in that, The first end of the first transmission element and the first end of the connecting portion are close to the power input side or the low-speed side of the torque transmission device, and the second end of the first transmission element and the second end of the connecting portion are close to the power output side or the high-speed side of the torque transmission device.

11. A gear box characterized in that, The gear box is configured with the torque transmission device according to any one of claims 1-10.

12. A wind power plant, characterized in that The wind power generation device is configured with the torque transmission device according to any one of claims 1-10, which is connected between the wind wheel and the generator. Alternatively, the wind power generation device is configured with the gear box according to claim 11, which is connected between the wind wheel and the generator.

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