CN218882747U - Positioning nut anti-loosening structure for yaw variable pitch gearbox and yaw variable pitch gearbox - Google Patents

Abstract

The anti-loosening structure comprises an output shaft body, a positioning nut and an anti-loosening body, wherein an external thread is arranged on the peripheral surface of the output shaft body, the positioning nut is provided with a threaded hole and a concave part communicated with the threaded hole, and the threaded hole is fixed with the external thread in a threaded manner; the locking body is inserted in the depressed part, and the locking body extrudes the external screw thread and forms a concave-convex matching structure with the output shaft body, so that the positioning nut is fixed relative to the output shaft body in the circumferential direction of the output shaft body through the locking body. The anti-loose structure of the positioning nut can simplify the processing technology, reduce the manufacturing cost and improve the bearing pre-tightening reliability.

Description

Positioning nut anti-loosening structure for yaw variable pitch gearbox and yaw variable pitch gearbox

Technical Field

The utility model relates to a transmission structure field particularly, relates to a driftage becomes oar positioning nut anti loosening structure and driftage to become oar gear box for gear box.

Background

As an important component department of a wind turbine generator, a yaw variable pitch gear box plays an important role in the running process of a fan, and the fan is mostly arranged on the gobi of high mountains and even on the sea and is mostly located in the severe environment, so that higher requirements are put forward on the reliability of the gear box. The tapered roller bearing is used as an important part at the output end of the yawing variable pitch gearbox, the looseness prevention mode of the pretightening force of the tapered roller bearing is particularly important, and how to maintain the pretightening force of the bearing in the designed service life has important influence on the strength and the service life of the bearing. In the prior art, the yaw variable pitch gearbox is mainly pre-tightened by using a round nut 001, and anti-loosening design is performed by using a form of a lock washer 002 and a key groove 003, as shown in fig. 1, the lock washer 002 is clamped into the key groove 003 at a specific position by processing the key groove 003 on a shaft 004, so that the anti-loosening purpose is achieved.

The inventor researches and discovers that the existing nut anti-loose structure has the following defects:

1. the key groove machining efficiency is low, the machining cost is high, and therefore the market competitiveness of the product is weakened; 2. the key slot and the tool withdrawal groove structure mean that a plurality of stress concentration parts are added on the shaft, so that the strength of the shaft is influenced, and quality risks are formed; 3. the key groove and the stop washer can only be clamped at a specific position, and the round nut cannot be positioned according to the required pretightening force.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a driftage becomes oar set nut locking structure for gear box and driftage to become oar gear box, it can simplify processing technology, reduces manufacturing cost, and improves bearing pretension reliability.

The embodiment of the utility model is realized like this:

in a first aspect, the utility model provides a driftage becomes positioning nut anti loosening structure for oar gear box, include:

the anti-loosening device comprises an output shaft body, a positioning nut and a loosening-preventing body, wherein an external thread is arranged on the outer peripheral surface of the output shaft body, the positioning nut is provided with a threaded hole and a concave part communicated with the threaded hole, and the threaded hole is fixed with the external thread in a threaded manner; the anti-loosening body is inserted into the concave part, extrudes the external thread and forms a concave-convex matching structure with the output shaft body, so that the positioning nut is fixed relative to the output shaft body in the circumferential direction of the output shaft body through the anti-loosening body.

In an alternative embodiment, the recess is provided as a groove, and the anti-loose body is embedded in the groove.

In an alternative embodiment, the groove is provided on a hole wall of the threaded hole of the positioning nut, and at least one end of the groove extends to an axial end face of the positioning nut.

In an optional embodiment, the recessed portion is provided as a positioning through hole, the positioning through hole penetrates through the outer circumferential surface and the inner circumferential surface of the positioning nut, and the anti-loose body is inserted into the positioning through hole.

In an alternative embodiment, the axis of the positioning through hole is arranged at an acute or obtuse angle to the axis of the positioning nut.

In an alternative embodiment, the number of the concave portions is plural, and one of the anti-loosening bodies is arranged in each of the concave portions.

In an alternative embodiment, the positioning nut has a first end and a second end in the axial direction, and the end face of the first end is used for abutting against an inner ring of a tapered roller bearing sleeved on the output shaft; the second end is provided with the joint body, the joint physical stamina produce under the exogenic action deformation in order with spline groove joint cooperation on the output shaft.

In an optional embodiment, the number of the clamping bodies is multiple, and the plurality of clamping bodies are arranged at intervals in the circumferential direction of the positioning nut.

In an alternative embodiment, the clamping body is provided as a ring-shaped body.

In a second aspect, the utility model provides a driftage becomes oar gear box, driftage becomes oar gear box includes:

the locknut structure for the yaw variable pitch gearbox in any one of the previous embodiments.

The embodiment of the utility model provides a beneficial effect is:

in summary, the anti-loose structure for the positioning nut for the yaw pitch-variable gearbox provided by the embodiment is characterized in that after the tapered roller bearing is sleeved on the output shaft, the positioning nut is sleeved outside the output shaft and is screwed with the external thread on the output shaft through the threaded hole, in the rotating process, the positioning nut is tightly abutted to the inner ring of the tapered roller bearing by applying torque, and the position of the concave part does not need to be considered, so that the abutting force between the positioning nut and the inner ring can be effectively ensured, and the position of the tapered roller bearing on the output shaft is firm and reliable. After the set nut screw in suitable position, peg graft the locking body in the depressed part again, because depressed part and screw hole intercommunication, make the external screw thread of locking physical stamina enough extrusion and screw hole spiro union, make the external screw thread produce deformation, the locking body has formed unsmooth cooperation structure with the external screw thread, also the locking body passes through the depressed part and realizes the joint with set nut, realize the joint through unsmooth cooperation structure and output shaft again, thus, it is spacing with the circumference of output shaft to have realized set nut through the locking body, set nut can not rotate around the output shaft, and then has played set nut's the locking effect of preventing moving back. The locking body realizes the joint cooperation through the extrusion output shaft, need not set up the joint groove on the output shaft in advance, can not restrict set nut's position, consequently, can guarantee including the reliable butt of set nut circles, the pretension is effectual.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a round nut anti-loosening structure in the prior art;

FIG. 2 is a schematic structural view of a locknut structure for a yaw pitch-variable gearbox according to an embodiment of the present invention;

fig. 3 is a structural schematic view of a deformation of the locknut structure for the yawing and pitching gearbox according to the embodiment of the present invention;

fig. 4 is a schematic structural view of another variation of the locknut structure for the yawing and pitching gearbox according to the embodiment of the present invention;

fig. 5 is a schematic structural view of another variation of the locknut anti-loosening structure for the yawing variable pitch gearbox according to the embodiment of the present invention.

Icon:

01-tapered roller bearings; 100-output shaft body; 110-a first shaft; 120-a second shaft; 130-spline grooves; 200-a positioning nut; 201-a threaded hole; 210-a recess; 220-a clamping body; 300-anti-loose body.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the prior art, the locking washer is used for preventing the circular nut from moving back and preventing the circular nut from locking, during assembly, a key groove needs to be machined outside a shaft body, a clamping groove is machined in the circular nut, then the locking washer is installed between the circular nut and the inner ring of the tapered roller bearing 01, the locking washer is clamped with the key groove and the clamping groove at the same time, and the positions of the key groove and the clamping groove need to be matched, so that the position of the circular nut is limited, and the pre-tightening force applied to the inner ring by the circular nut cannot be well guaranteed. In addition, a key groove needs to be machined on the shaft body, and the process is complicated.

In view of this, the designer provides a positioning nut anti-loosening structure for a yaw variable pitch gearbox, which can simplify the processing technology, reduce the cost, and effectively ensure the pretightening force applied by the positioning nut 200 on the bearing.

Referring to fig. 2 to 5, in the present embodiment, the locknut structure for a yaw pitch gearbox includes an output shaft 100, a locknut 200, and a locknut 300, wherein an external thread is disposed on an outer circumferential surface of the output shaft 100, the locknut 200 is provided with a threaded hole 201 and a recess 210 communicating with the threaded hole 201, and the threaded hole 201 is screwed and fixed with the external thread; the anti-loose body 300 is inserted into the recess 210, and the anti-loose body 300 extrudes the external thread and forms a concave-convex matching structure with the output shaft 100, so that the positioning nut 200 is fixed relative to the output shaft 100 in the circumferential direction of the output shaft 100 by the anti-loose body 300.

The assembly method of the locknut anti-loose structure for the yawing variable pitch gearbox provided by the embodiment is as follows:

after the tapered roller bearing 01 is sleeved on the output shaft, the positioning nut 200 is sleeved outside the output shaft and is in threaded connection with the external thread on the output shaft through the threaded hole 201, in the process of rotating the positioning nut 200, the positioning nut 200 can be abutted against the inner ring of the tapered roller bearing 01, the position of the concave part 210 does not need to be considered, the abutting force between the positioning nut 200 and the inner ring can be effectively guaranteed, and the position of the tapered roller bearing 01 on the output shaft is firm and reliable. After positioning nut 200 screw in suitable position, peg graft locking body 300 in depressed part 210 again, because depressed part 210 and screw hole 201 intercommunication, make locking body 300 can extrude the external screw thread with screw hole 201 spiro union, make the external screw thread produce deformation, locking body 300 and external screw thread have formed unsmooth cooperation structure, also promptly locking body 300 realizes the joint through depressed part 210 and positioning nut 200, realize the joint through unsmooth cooperation structure and output shaft again, so, positioning nut 200 has been realized through locking body 300 that the circumference of positioning nut 200 and output shaft is spacing, positioning nut 200 can not rotate around the output shaft, and then has played positioning nut 200's locking effect of preventing moving back. The locking body 300 realizes the joint cooperation through the extrusion output shaft, need not set up the joint groove on the output shaft in advance, can not restrict set nut 200's position, consequently, can guarantee including the reliable butt of set nut 200 circle, pretension is effectual.

In this embodiment, it should be noted that the output shaft is a stepped shaft, the output shaft has a first shaft body 110 and a second shaft body 120 which are coaxial, an outer diameter of the first shaft body 110 is larger than an outer diameter of the second shaft body 120, and an annular abutting surface is formed at a connection position of the first shaft body 110 and the second shaft body 120. The inner ring of the tapered roller bearing 01 is sleeved on the second shaft body 120 of the output shaft, and the inner ring of the tapered roller bearing 01 can abut against the annular abutting surface, so that the limit in the first direction is realized through the annular abutting surface. The external thread is arranged on the second shaft body 120, after the positioning nut 200 is screwed with the second shaft body 120, the positioning nut 200 is abutted to one end face of the inner ring far away from the annular abutting face, and the positioning nut 200 is used for limiting the conical roller bearing 01 in a second direction opposite to the first direction.

Referring to fig. 2, in this embodiment, optionally, the recessed portion 210 may be a groove, the groove is a through groove, the groove is disposed on a hole wall of the threaded hole 201 of the positioning nut 200 and extends along an axis of the threaded hole 201, and two ends of the groove in the length direction respectively extend to two axial end faces of the positioning nut 200. Specifically, the positioning nut 200 has a first end and a second end in the axial direction thereof, and two ends of the groove extend to end faces of the first end and the second end, respectively. The end face where the first end is located can abut against the inner race of the tapered roller bearing 01. The check body 300 may be inserted into the groove from the second end, and in the process of inserting the check body 300, a part of the outer circumferential surface of the check body 300 is located outside the groove, and the part of the outer circumferential surface can extrude the external thread to deform the external thread.

In addition, in other embodiments, a groove may be provided on the outer circumferential surface of the output shaft body 100, and the locking body 300 is inserted into the groove of the output shaft body 100. Alternatively, in other embodiments, grooves may be provided on both the output shaft 100 and the positioning nut 200, and the locking body 300 is positioned by the two grooves.

Referring to fig. 3 or 4, in other embodiments, optionally, the recess 210 may be a positioning through hole, the positioning through hole penetrates through the outer circumferential surface and the inner circumferential surface of the positioning nut 200, the anti-loose body 300 is inserted into the positioning through hole, and one end of the anti-loose body 300 can penetrate through the positioning through hole and abut against the outer surface of the output shaft, so that the outer surface of the output shaft deforms under the extrusion force.

Optionally, positioning hole's axis is acute angle or obtuse angle setting with set nut 200's axis, and so the design, the area of contact of the outer peripheral face of locking body 300 and output shaft is little, can make the outer peripheral face of output shaft change production deformation to realize unsmooth cooperation structure. Obviously, the axis of the positioning through hole may be perpendicular to the axis of the positioning nut 200, i.e., the axes of the two are disposed at 90 °.

It should be noted that, the number of the recessed portions 210 may be multiple, the plurality of recessed portions 210 may be uniformly arranged at intervals in the circumferential direction of the positioning nut 200, correspondingly, the number of the locking bodies 300 is multiple, the number of the locking bodies 300 is equal to that of the recessed portions 210, and the locking bodies 300 are in one-to-one correspondence, and each locking body 300 is inserted into a corresponding recessed portion 210, so that the stability of the positioning nut 200 can be improved.

Referring to fig. 5, in other embodiments, optionally, the second end of the positioning nut 200 is provided with a clamping body 220, and the clamping body 220 can deform under the action of an external force to be clamped and matched with the spline groove 130 on the output shaft. The joint body 220 can set up to the ring body, and the joint body 220 can be with set nut 200 integral type shaping, and the joint body 220 is metal construction, can produce deformation and intensity height, is difficult for being damaged. When the clamping body 220 is an annular body, the clamping body 220 and the positioning nut 200 are coaxially arranged, and the clamping body 220 can be clamped into the spline groove 130 corresponding to the position of the spline groove 130, so that a plurality of clamping matched structures are formed around the positioning nut 200, and the stability of the positioning nut 200 is improved.

According to the anti-loose structure of the positioning nut for the yawing variable-pitch gearbox, the processing of a key groove on an output shaft is cancelled, the cost is reduced, the reliability is improved, the position of the positioning nut 200 is not influenced by other structures, the positioning nut 200 can be better abutted against the inner ring of the tapered roller bearing 01, the bearing pre-tightening torque is accurate, and the service life of the bearing is prolonged; meanwhile, a tool withdrawal groove is eliminated, the cost is reduced, and the reliability is improved.

The embodiment also provides a yawing variable pitch gearbox, which comprises the positioning nut anti-loosening structure for the yawing variable pitch gearbox.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a driftage becomes for oar gear box set nut anti loosening structure which characterized in that includes:

the anti-loosening device comprises an output shaft body, a positioning nut and a loosening-preventing body, wherein an external thread is arranged on the outer peripheral surface of the output shaft body, the positioning nut is provided with a threaded hole and a concave part communicated with the threaded hole, and the threaded hole is fixedly connected with the external thread in a threaded manner; the anti-loosening body is inserted into the concave part, extrudes the external thread and forms a concave-convex matching structure with the output shaft body, so that the positioning nut is fixed relative to the output shaft body in the circumferential direction of the output shaft body through the anti-loosening body.

2. The locknut structure for the yaw variable pitch gearbox according to claim 1, wherein:

the depressed part sets up to the recess, locking body inlays to be located in the recess.

3. The locknut structure for the yaw variable pitch gearbox according to claim 2, wherein:

the groove is formed in the hole wall of the threaded hole of the positioning nut, and at least one end of the groove extends to the axial end face of the positioning nut.

4. The locknut structure for the yaw variable pitch gearbox according to claim 1, wherein:

the sunken part is provided with a positioning through hole which penetrates through the outer peripheral surface and the inner peripheral surface of the positioning nut, and the anti-loosening body is inserted into the positioning through hole.

5. The locknut structure for the yaw variable pitch gearbox according to claim 4, wherein:

the axis of the positioning through hole and the axis of the positioning nut are arranged in an acute angle or an obtuse angle.

6. The locknut structure for the yaw variable pitch gearbox according to any one of claims 1 to 5, wherein:

the quantity of depressed part is a plurality of, every all dispose one in the depressed part locking body.

7. The locknut structure for the yaw variable pitch gearbox according to any one of claims 1 to 5, wherein:

the positioning nut is provided with a first end and a second end in the axial direction, and the end face where the first end is located is used for being abutted to an inner ring of a tapered roller bearing sleeved on the output shaft; the second end is provided with the joint body, the joint physical stamina produce under the exogenic action deformation in order with spline groove joint cooperation on the output shaft.

8. The locknut structure for the yaw variable pitch gearbox according to claim 7, wherein:

the quantity of the joint body is a plurality of, and is a plurality of the joint body is in positioning nut's interval is arranged in the circumference.

9. The locknut structure for the yaw variable pitch gearbox according to claim 7, wherein:

the clamping body is an annular body.

10. A yaw pitch gearbox, comprising:

the locknut arrangement for a yaw pitch gearbox of any one of claims 1-9.

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