CN210920038U - Gear box with bearing pre-tightening structure - Google Patents
Gear box with bearing pre-tightening structure Download PDFInfo
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- CN210920038U CN210920038U CN201922000711.XU CN201922000711U CN210920038U CN 210920038 U CN210920038 U CN 210920038U CN 201922000711 U CN201922000711 U CN 201922000711U CN 210920038 U CN210920038 U CN 210920038U
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- bearing
- stop washer
- output shaft
- gasket
- tightening
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Abstract
The utility model discloses a gear box of tape bearing pretension structure belongs to gear box technical field. The gear box includes: the box body, the output shaft and the bearing; the length of a bearing hole in the box body is greater than the axial width of the bearing; the gasket is arranged on the output shaft and is abutted against the front end of the bearing, and when the bearing is not pre-tightened, the distance between the front end of the bearing and the front end surface of the bearing hole is smaller than the thickness of the gasket; the stop washer is arranged on the output shaft and is abutted against the front end of the gasket, and the maximum outer diameter of the stop washer is larger than the diameter of the bearing hole; and the locking nut is arranged on the output shaft and is abutted against the front end of the stop washer, the bearing can be pre-tightened by screwing the locking nut, and the stop washer is contacted with the front end surface of the bearing hole when pre-tightening is finished. The utility model discloses a set up gasket and the lock washer that the external diameter is bigger than the dead eye diameter, can realize carrying out accurate pretension to the bearing.
Description
Technical Field
The utility model relates to a gear box technical field especially relates to a gear box of tape bearing pretension structure.
Background
Yaw pitch gearboxes are gearboxes used in wind power generation, mainly for changing rotor orientation and blade angle. Because the yaw variable pitch gear box is mostly arranged on the gobi of the high mountain, the environment is severe, the maintenance is inconvenient, the maintenance cost is high, and the quality requirement on the gear box is higher.
In a traditional yaw variable pitch gearbox, two cone bearings are generally arranged back to back at an output end, please refer to fig. 1, and in order to improve the rigidity of a bearing and prolong the service life of the bearing, the bearing needs to be pre-tightened. As shown in fig. 1, a pretensioning manner of a lock nut 1 ' (generally, a round nut) and a lock washer 2 ' is generally adopted in the prior art, pretensioning of a bearing is realized by tightening the lock nut 1 ', due to the influence of various factors such as tolerance of thread and part processing, difference of friction coefficients of parts surfaces, difference of external environments and the like, the pretensioning manner cannot accurately reach a required pretensioning amount, has large deviation, and the pretensioning manner cannot intuitively observe whether the pretensioning amount reaches a standard, cannot accurately control the pretensioning amount of the bearing, and the service life and reliability of the bearing can be reduced if the pretensioning amount of the bearing does not reach the standard.
Accordingly, the prior art is yet to be improved and developed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a gear box of tape bearing pretension structure to solve among the prior art driftage become bearing pretension volume of oar gear box can not accurate control, lead to the problem that the bearing life-span reduces.
To achieve the purpose, the utility model adopts the following technical proposal:
a gearbox with a bearing pretension structure, comprising:
the output shaft is arranged on the box body through the bearing; the length of a bearing hole in the box body is greater than the axial width of the bearing;
the gasket is arranged on the output shaft and is abutted against the front end of the bearing, and when the bearing is not pre-tightened, the distance between the front end of the bearing and the front end surface of the bearing hole is smaller than the thickness of the gasket;
the stop washer is arranged on the output shaft and is abutted against the front end of the gasket, and the maximum outer diameter of the stop washer is larger than the diameter of the bearing hole;
and the locking nut is arranged on the output shaft and is abutted against the front end of the stop washer, the bearing can be pre-tightened by screwing the locking nut, and the stop washer is contacted with the front end surface of the bearing hole when pre-tightening is finished.
Optionally, when the bearing is not pre-tightened, the distance between the front end of the bearing and the front end face of the bearing hole is μ1The pre-tightening amount of the bearing is delta, and the thickness of the gasket is mu2＝μ1+δ。
Optionally, the edge of the stop washer is provided with a protrusion extending in a radial direction of the stop washer.
Optionally, the length of the bearing hole is 1-4mm greater than the axial width of the bearing.
Optionally, the bearing is a tapered roller bearing.
Optionally, the gasket is made of steel.
The utility model has the advantages that:
the utility model discloses a length with the dead eye sets up to be greater than the axial width of bearing, sets up the gasket pad between bearing and lock washer, and lock washer's maximum outer diameter is greater than the dead eye diameter, when screwing up lock nut and carrying out the pretension to the bearing, when lock washer contacts the dead eye terminal surface, has reached the pretension volume of settlement promptly, through observing whether lock washer contacts the dead eye terminal surface and judges whether reach the pretension volume of settlement, the pretension volume that reaches that can be accurate.
Drawings
FIG. 1 is a schematic view of a yaw pitch gearbox according to the prior art;
FIG. 2 is a schematic structural view of an embodiment of the gear box of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2 according to the present invention;
fig. 4 is a schematic structural view of an embodiment of a stop washer according to the present invention.
In the figure:
1', 1-locking nut; 2', 2-stop washer; 3, a box body; 4-an output shaft; 5-a bearing; 6-a gasket;
11-chamfering surface; 21-bulge; 31-bearing bore.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. 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 present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
The utility model provides a gear box of tape spool bearing pretension structure, figure 2 is the utility model discloses the structural schematic diagram of gear box embodiment, the utility model discloses the improvement part of gear box mainly is the improvement to the bearing pretension mode of driftage change oar gear box output, as shown in figure 2, the utility model discloses the gear box includes box 3, output shaft 4, bearing 5, gasket 6, lock washer 2, lock nut 1. The output shaft 4 is mounted on the case 3 through a bearing 5.
Fig. 3 is an enlarged view of a portion a in fig. 2 of the present invention, as shown in fig. 3, a bearing hole 31 is formed in the case 3, the bearing 5 is disposed in the bearing hole 31, and a length L of the bearing hole 31 is greater than an axial width d of the bearing 5, so that whether the preload is in place can be determined by using a front end surface of the bearing 5.
A spacer 6 is provided on the output shaft 4 and abuts against the front end of the inner ring of the bearing 5, and when the bearing 5 is not pre-tightened, the distance μ between the front end of the bearing 5 and the front end face of the bearing hole 311Less than the thickness mu of the shim 62So that the bearing 5 has a pre-tightening space.
The stop washer 2 is arranged on the output shaft 4, the stop washer 2 is abutted against the front end of the gasket 6, and the maximum outer diameter of the stop washer 2 is larger than the diameter of the bearing hole 31, so that the outermost ring of the stop washer 2 can be contacted with the end face of the bearing hole 31 when the lock nut 1 is screwed down, and whether pre-tightening is in place or not is judged by the contact of the stop washer 2 and the end face of the bearing hole 31.
The lock nut 1 is arranged on the output shaft 4, generally a round nut, the lock nut 1 is abutted against the front end of the stop washer 2, of course, the output shaft 4 is in threaded fit with the lock nut 1, the bearing 5 can be pre-tightened by screwing the lock nut 1, and when pre-tightening is completed, the stop washer 2 is in contact with the front end face of the bearing hole 31.
As shown in FIG. 3, when the lock nut 1 is not tightened, the thickness μ of the washer 6 is increased2Is larger than the distance mu between the front end of the bearing 5 and the front end surface of the bearing hole 311Therefore, the stop washer 2 is away from the front end face of the bearing hole 31 and does not contact with the front end face of the bearing hole 31, the inner ring of the bearing 5 is pushed axially along with the tightening of the lock nut 1 to realize pre-tightening, the stop washer 2 and the gasket 6 also move axially, the distance between the stop washer 2 and the front end face of the bearing hole 31 is gradually reduced, and when the stop washer 2 contacts with the front end face of the bearing hole 31, the pre-tightening is in place. Therefore, whether pre-tightening is in place or not is judged by the contact of the stop washer 2 and the front end face of the bearing hole 31, accurate pre-tightening can be realized, and the prior art does not have a mode for intuitively judging whether pre-tightening is in place or not, so that accurate pre-tightening cannot be realized.
In one embodiment, as shown in fig. 3, when the bearing 5 is not preloaded, the distance between the front end of the bearing 5 and the front end surface of the bearing hole 31 is set to μ1The preload of the bearing 5 is delta and the thickness mu of the shim 62＝μ1+ δ and the preload δ of the bearing 5 are artificially defined amounts, and are specifically set as needed, and the shim 6 having an appropriate thickness is selected according to the preload δ needed.
Furthermore, a protrusion 21 may be disposed on the edge of the lock washer 2, as shown in fig. 4, the protrusion 21 extends along the radial direction of the lock washer 2, when the protrusion 21 contacts with the front end surface of the bearing hole 31, it indicates that the pre-tightening is completed, and after the pre-tightening is completed, the protrusion 21 may be bent onto the lock nut 1, so that the diameter of the lock washer 2 may be reduced without affecting the operation of the whole machine. The protrusion 21 is arranged, so that the contact between the front end face of the lock washer 2 and the front end face of the bearing 5 can be realized, the problem that the whole lock washer 2 needs to be in a large outer diameter and wastes materials can be avoided, the protrusion 21 can be bent after pre-tightening is completed conveniently, and the problem that the outermost ring of the lock washer 2 is too large to influence other parts is avoided.
Preferably, the gasket 6 is made of steel.
In one embodiment, the length L of the bearing bore 31 is 1-4mm, preferably 2-3mm, greater than the axial width d of the bearing 5, so that both the pretension is ensured and the provision of too thick spacers 6 is avoided.
In one embodiment, the bearing 5 is a tapered roller bearing.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (6)
1. A gear box with a bearing pre-tightening structure is characterized by comprising:
the device comprises a box body (3), an output shaft (4) and a bearing (5), wherein the output shaft (4) is arranged on the box body (3) through the bearing (5); the length of a bearing hole (31) on the box body (3) is larger than the axial width of the bearing (5);
the gasket (6) is arranged on the output shaft (4) and is abutted against the front end of the bearing (5), and when the bearing (5) is not pre-tightened, the distance between the front end of the bearing (5) and the front end surface of the bearing hole (31) is smaller than the thickness of the gasket (6);
the stop washer (2) is arranged on the output shaft (4) and is abutted against the front end of the gasket (6), and the maximum outer diameter of the stop washer (2) is larger than the diameter of the bearing hole (31);
the locking nut (1) is arranged on the output shaft (4) and abutted against the front end of the stop washer (2), the bearing (5) can be pre-tightened by tightening the locking nut (1), and the stop washer (2) is contacted with the front end face of the bearing hole (31) when pre-tightening is completed.
2. Gearbox with bearing preload structure as claimed in claim 1, characterized in that the distance between the front end of the bearing (5) and the front end face of the bearing hole (31) is μ when the bearing (5) is not preloaded1The pre-tightening amount of the bearing (5) is delta, and the thickness mu of the gasket (6)2＝μ1+δ。
3. Gearbox with bearing preload configuration according to claim 1, characterized in that the edge of the stop washer (2) is provided with a protrusion (21), said protrusion (21) extending in the radial direction of the stop washer (2).
4. Gearbox with bearing preload construction according to claim 1, characterized in that the length of the bearing bore (31) is 1-4mm greater than the axial width of the bearing (5).
5. Gearbox with bearing preload construction according to claim 1, characterized in that the bearing (5) is a tapered roller bearing.
6. Gearbox with bearing preload construction according to claim 1, characterized in that said spacer (6) is steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922000711.XU CN210920038U8 (en) | 2019-11-19 | 2019-11-19 | Gear box with bearing pre-tightening structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922000711.XU CN210920038U8 (en) | 2019-11-19 | 2019-11-19 | Gear box with bearing pre-tightening structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN210920038U true CN210920038U (en) | 2020-07-03 |
| CN210920038U8 CN210920038U8 (en) | 2023-03-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922000711.XU Active CN210920038U8 (en) | 2019-11-19 | 2019-11-19 | Gear box with bearing pre-tightening structure |
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| Country | Link |
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| CN (1) | CN210920038U8 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112524222A (en) * | 2020-11-27 | 2021-03-19 | 南京高精轨道交通设备有限公司 | Bearing clearance adjusting method, gear box and prefabricated gasket |
-
2019
- 2019-11-19 CN CN201922000711.XU patent/CN210920038U8/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112524222A (en) * | 2020-11-27 | 2021-03-19 | 南京高精轨道交通设备有限公司 | Bearing clearance adjusting method, gear box and prefabricated gasket |
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| Publication number | Publication date |
|---|---|
| CN210920038U8 (en) | 2023-03-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CU01 | Correction of utility model |
Correction item: Patentee|Address Correct: NANJING HIGH-SPEED & ACCURATE GEAR GROUP Co.,Ltd.|No. 79, Jianheng Road, Jiangning District, Nanjing City, Jiangsu Province, 210012 False: NANJING HIGH SPEED GEAR MANUFACTURING Co.,Ltd.|No.30, Houjiao Road, gaoxinyuan, Jiangning District, Nanjing City, Jiangsu Province Number: 27-02 Page: The title page Volume: 36 Correction item: Patentee|Address Correct: NANJING HIGH-SPEED & ACCURATE GEAR GROUP Co.,Ltd.|No. 79, Jianheng Road, Jiangning District, Nanjing City, Jiangsu Province, 210012 False: NANJING HIGH SPEED GEAR MANUFACTURING Co.,Ltd.|No.30, Houjiao Road, gaoxinyuan, Jiangning District, Nanjing City, Jiangsu Province Number: 27-02 Volume: 36 |
|
| CU01 | Correction of utility model | ||
| OR01 | Other related matters | ||
| OR01 | Other related matters |